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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/parport
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'drivers/parport')
-rw-r--r--drivers/parport/BUGS-parport9
-rw-r--r--drivers/parport/ChangeLog583
-rw-r--r--drivers/parport/Kconfig145
-rw-r--r--drivers/parport/Makefile19
-rw-r--r--drivers/parport/TODO-parport20
-rw-r--r--drivers/parport/daisy.c512
-rw-r--r--drivers/parport/ieee1284.c819
-rw-r--r--drivers/parport/ieee1284_ops.c921
-rw-r--r--drivers/parport/multiface.h20
-rw-r--r--drivers/parport/parport_amiga.c293
-rw-r--r--drivers/parport/parport_arc.c139
-rw-r--r--drivers/parport/parport_atari.c240
-rw-r--r--drivers/parport/parport_cs.c397
-rw-r--r--drivers/parport/parport_gsc.c437
-rw-r--r--drivers/parport/parport_gsc.h222
-rw-r--r--drivers/parport/parport_mfc3.c404
-rw-r--r--drivers/parport/parport_pc.c3415
-rw-r--r--drivers/parport/parport_serial.c485
-rw-r--r--drivers/parport/parport_sunbpp.c412
-rw-r--r--drivers/parport/probe.c224
-rw-r--r--drivers/parport/procfs.c533
-rw-r--r--drivers/parport/share.c1014
22 files changed, 11263 insertions, 0 deletions
diff --git a/drivers/parport/BUGS-parport b/drivers/parport/BUGS-parport
new file mode 100644
index 000000000000..622ca3cc7fa0
--- /dev/null
+++ b/drivers/parport/BUGS-parport
@@ -0,0 +1,9 @@
1Currently known (or at least suspected) bugs in parport:
2
3o lp doesn't allow you to read status while printing is in progress (is
4 this still true?).
5
6o parport_pc_ecp_read_block_pio() is broken. parport will revert to the
7 software-driven mode in ieee1284_ops.c
8
9See <URL:http://people.redhat.com/twaugh/parport/>.
diff --git a/drivers/parport/ChangeLog b/drivers/parport/ChangeLog
new file mode 100644
index 000000000000..db717c1d62a5
--- /dev/null
+++ b/drivers/parport/ChangeLog
@@ -0,0 +1,583 @@
12001-10-11 Tim Waugh <twaugh@redhat.com>
2 * parport_pc.c, parport_serial.c: Support for NetMos cards.
3 + Patch originally from Michael Reinelt <reinelt@eunet.at>.
4
52002-04-25 Tim Waugh <twaugh@redhat.com>
6
7 * parport_serial.c, parport_pc.c: Move some SIIG cards around.
8 Patch from Andrey Panin.
9
102002-01-20 Tim Waugh <twaugh@redhat.com>
11
12 * parport_pc.c (parport_pc_compat_write_block_pio,
13 parport_pc_ecp_write_block_pio, parport_pc_ecp_read_block_pio):
14 Use the default implementations if the caller wants to use
15 O_NONBLOCK.
16
172002-02-25 Tim Waugh <twaugh@redhat.com>
18
19 * parport_pc.c: Make sure that priv->ctr_writable includes IntEn
20 even if IRQ is given as a parameter.
21
222002-01-21 Tim Waugh <twaugh@redhat.com>
23
24 * daisy.c: Apply patch from Max Vorobiev to make parport_daisy_select
25 work for ECP/EPP modes.
26
272002-01-13 Niels Kristian Bech Jensen <nkbj@image.dk>
28
29 * parport_pc.c: Change some occurrences of frob_set_mode to
30 ECR_WRITE. This fixes PLIP.
31
322002-01-04 Tim Waugh <twaugh@redhat.com>
33
34 * share.c (parport_claim_or_block): Sleep interruptibly to prevent
35 a possible deadlock.
36
372001-12-07 Damian Gruszka <damian.gruszka@VisionSystems.de>
38
39 * parport_pc.c (ECR_WRITE): Define. If there are forbidden bits
40 in the ECR register for some chips, this will be a useful place to
41 put that knowledge.
42 (change_mode): Use ECR_WRITE.
43 (parport_pc_restore_state): Likewise.
44 (parport_ECPPS2_supported): Likewise.
45 (parport_ECPEPP_supported): Likewise.
46 (irq_probe_EPP): Likewise.
47 (programmable_irq_support): Likewise.
48 (programmable_dma_support): Likewise.
49 (parport_pc_probe_port): Likewise.
50
51 (frob_set_mode): New function. Set the mode bits of the ECR.
52 (get_fifo_residue): Use frob_set_mode.
53 (parport_pc_ecpepp_read_data): Likewise.
54 (parport_pc_ecpepp_write_data): Likewise.
55 (parport_pc_ecpepp_read_addr): Likewise.
56 (parport_pc_ecpepp_write_addr): Likewise.
57 (parport_pc_compat_write_block_pio): Likewise.
58 (parport_pc_ecp_write_block_pio): Likewise.
59 (parport_ECR_present): Likewise.
60 (parport_ECP_supported): Likewise.
61 (parport_EPP_supported): Likewise.
62 (parport_ECPEPP_supported): Likewise.
63 (programmable_irq_support): Likewise.
64 (irq_probe_ECP): Likewise.
65 (programmable_dma_support): Likewise.
66
67 (parport_pc_enable_irq): Only enable interrupts if we know which
68 IRQ line they will come from.
69 (parport_pc_init_state): Set nErrIntrEn at initialisation.
70 (parport_pc_restore_state): Only write writable bits of CTR.
71 (parport_irq_probe): If no IRQ is found, take ackIntEn out of the
72 writable bit set.
73
742001-12-07 Tim Waugh <twaugh@redhat.com>
75
76 * parport_pc.c (parport_pc_fifo_write_block_pio): Correct typo.
77 (parport_pc_init_state): Only set ackIntEn if we know which IRQ
78 line the interrupts will come from.
79
802001-12-07 Tim Waugh <twaugh@redhat.com>
81
82 * ieee1284_ops.c (parport_ieee1284_epp_write_addr,
83 parport_ieee1284_epp_read_addr): Actually do something useful.
84
852001-12-07 Tim Waugh <twaugh@redhat.com>
86
87 * parport_pc.c (dmaval): Don't use DMA by default. It seems to be
88 too buggy at the moment. Use 'dma=auto' to restore the previous
89 behaviour.
90
912001-12-07 Tim Waugh <twaugh@redhat.com>
92
93 * daisy.c (DEBUG): Undefine.
94
952001-12-06 Tim Waugh <twaugh@redhat.com>
96
97 * ieee1284_ops.c (parport_ieee1284_ecp_read_data): Mask off
98 PARPORT_CONTROL_AUTOFD as well. Bug spotted by Joe
99 <joeja@mindspring.com>.
100
1012001-12-03 Rich Liu <Rich.Liu@ite.com.tw>
102
103 * parport_pc.c (sio_ite_8872_probe): ITE8873 is a single-port
104 serial board, not a serial+parallel.
105
1062001-11-30 Niels Kristian Bech Jensen <nkbj@image.dk>
107
108 * parport_pc.c: Fix compiler warning.
109
1102001-11-14 Tim Waugh <twaugh@redhat.com>
111
112 * parport_pc.c (parport_pc_pci_probe): Hooks for PCI cards before
113 and after probing for ports.
114 * parport_serial.c (parport_register): Likewise.
115
1162001-11-12 Tim Waugh <twaugh@redhat.com>
117
118 * parport_pc.c (init_module): Warn when parameters are ignored.
119
1202001-11-01 Damian Gruszka <damian.gruszka@VisionSystems.de>
121
122 * parport_serial.c (serial_register): Set base_baud before
123 calling register_serial.
124
1252001-10-26 Tim Waugh <twaugh@redhat.com>
126
127 * parport_pc.c (parport_irq_probe): When ECR programmable IRQ
128 support fails, generate interrupts using the FIFO even if we don't
129 want to use the FIFO for real data transfers.
130 (parport_pc_probe_port): Display the ECR address if we have an
131 ECR, not just if we will use the FIFO.
132
1332001-10-24 Dave Strauss <D.Strauss@motorola.com>
134
135 * parport_pc.c (parport_pc_compat_write_block_pio,
136 parport_pc_ecp_write_block_pio): Allow a few seconds for an ECP
137 transfer to finish up.
138
1392001-10-11 Tim Waugh <twaugh@redhat.com>
140
141 * parport_pc (sio_ite_8872_probe): New function, submitted by Rich
142 Liu from ITE. Cleaned up, removed bogus phys_to_virt calls.
143
1442001-10-24 Tim Waugh <twaugh@redhat.com>
145
146 * parport_pc.c: Support for AKS AladdinCARD. Patch from
147 Aladdin Knowledge Systems (Christian Groessler).
148
1492001-10-24 Tim Waugh <twaugh@redhat.com>
150
151 * ieee1284_ops.c (parport_ieee1284_ecp_read_data): Try to minimise
152 turnaround time.
153
154 * ieee1284.c (parport_poll_peripheral): Try a couple of times
155 first without delaying.
156
1572001-10-10 Tim Waugh <twaugh@redhat.com>
158
159 * parport_pc.c: Support for OX16PCI954 PCI card.
160
1612001-10-10 Tim Waugh <twaugh@redhat.com>
162
163 * parport_pc.c: Support for OX12PCI840 PCI card (reported by
164 mk@daveg.com). Lock-ups diagnosed by Ronnie Arosa (and now we
165 just don't trust its ECR).
166
1672001-10-10 Gunther Mayer <gunther.mayer@braunschweig.okersurf.de>
168
169 * parport_pc.c: Support for AVLAB cards.
170
1712001-10-10 Tim Waugh <twaugh@redhat.com>
172
173 * ieee1284_ops.c (ecp_forward_to_reverse, ecp_reverse_to_forward):
174 Remember to retry direction switch if it fails. Patch from David
175 Lambert.
176
1772001-10-08 David C. Hansen <haveblue@us.ibm.com>
178
179 * share.c: Make driverlist_lock and parportlist_lock static.
180
1812001-10-08 Philip Blundell <philb@gnu.org>
182
183 * parport_pc.c: New modular parameter verbose_logging.
184 Make port->modes indicate the modes that we are prepared to use,
185 rather than the modes that are available.
186
1872001-10-07 Tim Waugh <twaugh@redhat.com>
188
189 * parport_pc.c (parport_pc_probe_port): Fix memory leak spotted by
190 Kipp Cannon.
191
1922001-10-07 Tim Waugh <twaugh@redhat.com>
193
194 * parport_serial.c: Remove NetMos support, since it causes problems
195 for some people.
196
1972001-08-30 Tim Waugh <twaugh@redhat.com>
198
199 * parport_serial.c (parport_serial_pci_probe): Clean-up on partial
200 registration failure.
201
2022001-08-14 Tim Waugh <twaugh@redhat.com>
203
204 * parport_pc.c (parport_pc_init_superio): Allow for more than one
205 SuperIO device. Patch from Rich Lio (ITE).
206
2072001-08-11 Tim Waugh <twaugh@redhat.com>
208
209 * parport_pc.c: Support for Titan Electronics cards.
210
2112001-08-08 Tim Waugh <twaugh@redhat.com>
212
213 * share.c (parport_unregister_device): Remove device from wait list
214 too.
215
2162001-06-20 Tim Waugh <twaugh@redhat.com>
217
218 * parport_pc.c: Make 'io_hi=0' work.
219
2202001-05-31 Tim Waugh <twaugh@redhat.com>
221
222 * parport_serial.c: New file.
223
2242001-06-05 Tim Waugh <twaugh@redhat.com>
225
226 * parport_pc.c (parport_pc_unregister_port): New exported function.
227 Do the opposite of parport_pc_probe_port.
228 (cleanup_module): Use it.
229
2302001-05-22 Juan Quintela <quintela@mandrakesoft.com>
231
232 * parport_amiga.c: Set printk levels.
233 * parport_gsc.c: Likewise.
234 * parport_mfc3.c: Likewise.
235 * parport_pc.c: Likewise.
236 * parport_sunbpp.c: Likewise.
237 * probe.c: Likewise.
238 * share.c: Likewise.
239
2402001-05-10 Fred Barnes <frmb2@ukc.ac.uk>
241
242 * parport_pc.c (parport_pc_epp_read_data): added support for
243 reading from a w91284pic peripheral, flag is PARPORT_W91284PIC.
244
2452001-05-07 Fred Barnes <frmb2@ukc.ac.uk>
246
247 * parport_pc.c (parport_pc_epp_read_data,
248 parport_pc_epp_write_data, parport_pc_epp_read_addr,
249 parport_pc_epp_write_addr): support for fast reads/writes using
250 the PARPORT_EPP_FAST flag.
251
252 * ieee1284.c (parport_read, parport_write): added code to handle
253 software EPP mode (IEEE1284_MODE_EPPSWE). Added code to allow
254 BYTE mode reverse transfers (previously always went for NIBBLE
255 mode).
256
257 * ieee1284_ops.c (parport_ieee1284_epp_read_data,
258 parport_ieee1284_epp_write_data): fixed various polarity problems.
259 Also (theoretically) fixed address versions (.._addr), but no
260 hardware to test this on.
261
262 * parport_pc.h: added parport_dump_state() function for debugging.
263 Needs to have DEBUG_PARPORT to be defined for it to be included.
264
2652001-05-03 Tim Waugh <twaugh@redhat.com>
266
267 * parport_pc.c: Fix the compile problem I introduce from the last
268 change.
269
2702001-04-20 Paul Gortmaker <p_gortmaker@yahoo.com>
271
272 * parport_pc.c: Cut down the size quite a bit (more than 4k off
273 the object, about 1k off the zImage) for the older non-PCI
274 machines which are typically resource starved anyway...
275
2762001-03-26 R Horn <rjh@world.std.com>
277
278 * parport_pc.c: Some commentary changes.
279
2802001-04-19 Tim Waugh <twaugh@redhat.com>
281
282 * parport_pc.c (parport_pc_probe_port): Remove __devinit
283 attribute. Export unconditionally.
284
2852001-04-14 Jeff Garzik <jgarzik@pobox.com>
286
287 Merged: 2001-03-30 Tim Waugh <twaugh@redhat.com>
288
289 * drivers/parport/parport_pc.c: Make Via SuperIO chipsets behave
290 like everything else with respect to irq= and dma= parameters.
291
2922001-04-08 Tim Waugh <twaugh@redhat.com>
293
294 * parport_pc.c (parport_pc_save_state): Read from the soft copy of
295 the control port.
296 (parport_pc_restore_state): Update the soft copy of the control
297 port.
298
2992001-03-26 Tim Waugh <twaugh@redhat.com>
300
301 * share.c (parport_find_number, parport_find_base): Trigger
302 a lowlevel driver load if there are no ports yet.
303
3042001-03-26 Tim Waugh <twaugh@redhat.com>
305
306 * parport_pc.c (parport_ECP_supported): Remove the IRQ conflict
307 check since it seems totally unreliable.
308
3092001-03-02 Tim Waugh <twaugh@redhat.com>
310
311 * ieee1284_ops.c (parport_ieee1284_read_nibble): Reset nAutoFd
312 on timeout. Matches 2.2.x behaviour.
313
3142001-03-02 Andrew Morton <andrewm@uow.edu.au>
315
316 * parport_pc.c (registered_parport): New static variable.
317 (parport_pc_find_ports): Set it when we register PCI driver.
318 (init_module): Unregister PCI driver if necessary when we
319 fail.
320
3212001-03-02 Tim Waugh <twaugh@redhat.com>
322
323 * ieee1284_ops.c (parport_ieee1284_write_compat): Don't use
324 down_trylock to reset the IRQ count. Don't even use sema_init,
325 because it's not even necessary to reset the count. I can't
326 remember why we ever did.
327
3282001-01-04 Peter Osterlund <peter.osterlund@mailbox.swipnet.se>
329
330 * ieee1284.c (parport_negotiate): Fix missing printk argument.
331
3322001-01-03 Paul Schleger <Paul.Schleger@t-online.de>
333
334 * probe.c (parse_data): Get rid of trailing blanks in values.
335 Needed for XEROX XJ8C printer.
336
3372001-01-03 Tim Waugh <twaugh@redhat.com>
338
339 * parport_pc.c (parport_pc_probe_port): Say something when probes
340 are omitted.
341
3422001-01-03 Tim Waugh <twaugh@redhat.com>
343
344 * parport_pc.c (sio_via_686a_probe): Correct dma=255 fix.
345
3462000-11-21 Tim Waugh <twaugh@redhat.com>
347
348 * parport_pc.c (parport_pc_ecp_write_block_pio): Fix
349 reverse-to-forward logic. Spotted by Roland Kuck
350 <rci@cityweb.de>.
351
3522000-09-16 Cesar Eduardo Barros <cesarb@nitnet.com.br>
353
354 * parport_pc.c (sio_via_686a_probe): Handle case
355 where hardware returns 255 for IRQ or DMA.
356
3572000-07-20 Eddie C. Dost <ecd@skynet.be>
358
359 * share.c (attach_driver_chain): attach[i](port) needs to be
360 replaced by attach[count](port).
361
3622000-07-20 Eddie C. Dost <ecd@skynet.be>
363
364 * daisy.c (add_dev): kmalloc args are in wrong order.
365
3662000-07-12 Tim Waugh <twaugh@redhat.com>
367
368 * share.c: Documentation for parport_{get,port}_port,
369 parport_find_{number,base}.
370
3712000-07-12 Tim Waugh <twaugh@redhat.com>
372
373 * share.c (parport_unregister_device): Remove unneeded locking
374 (test cad==dev).
375 (parport_claim): Likewise.
376 (parport_find_number): New function.
377
3782000-07-12 Tim Waugh <twaugh@redhat.com>
379
380 * share.c (parport_register_port): Hold the parportlist_lock while
381 looking for a free parport number.
382 (parport_register_driver): Make sure that attach can block.
383 (attach_driver_chain): Likewise.
384
3852000-07-12 Tim Waugh <twaugh@redhat.com>
386
387 * share.c (call_driver_chain): Do reference counting things.
388 (parport_get_port): New function.
389 (parport_put_port): New function.
390 (parport_register_port): Initialise reference count to zero.
391 (parport_unregister_port): Check reference count rather than
392 driver list to see if we can free the port.
393
3942000-07-12 Tim Waugh <twaugh@redhat.com>
395
396 * share.c: Clarifications in doc comments.
397
3982000-07-12 Tim Waugh <twaugh@redhat.com>
399
400 * share.c (parport_unregister_port): Fix typo in comment.
401
4022000-07-11 Gunther Mayer <gunther.mayer@braunschweig.okersurf.de>
403
404 * parport_pc.c: Support for the full range of Timedia cards.
405
4062000-07-08 Tim Waugh <twaugh@redhat.com>
407
408 * daisy.c: License block comments as part of parportbook.
409 * ieee1284.c: Likewise.
410 * share.c: Likewise.
411
4122000-06-30 Petr Vandrovec <vandrove@vc.cvut.cz>
413
414 * procfs.c (do_hardware_modes): Generated string can be up to 34
415 chars long.
416
4172000-06-20 Gunther Mayer <gunther.mayer@braunschweig.okersurf.de>
418
419 * parport_pc.c (parport_pc_compat_write_block_pio): Warn about
420 change_mode failures.
421 (parport_pc_ecp_write_block_pio): Likewise.
422 (parport_pc_ecp_read_block_pio): Likewise.
423
4242000-06-20 Gunther Mayer <gunther.mayer@braunschweig.okersurf.de>
425
426 * parport_pc.c (parport_SPP_supported): Warn more about possibly
427 incorrect parameters.
428
4292000-06-15 Tim Waugh <twaugh@redhat.com>
430
431 * parport_pc.c (parport_ECP_supported): Set PARPORT_MODE_COMPAT
432 for ECP ports, since they can all do hardware accelerated
433 compatibility mode (I assume).
434
4352000-06-13 Tim Waugh <twaugh@redhat.com>
436
437 * parport_pc.c (cleanup_module): Remark about possible bugs.
438
4392000-06-13 Tim Waugh <twaugh@redhat.com>
440
441 * procfs.c: Break 'hardware' out into separate files.
442
4432000-05-28 Gunther Mayer <gunther.mayer@braunschweig.okersurf.de>
444
445 * Fix PCI ID printk for non-superio PCI cards.
446
4472000-05-28 Tim Waugh <twaugh@redhat.com>
448
449 * share.c (call_driver_chain): Get the driverlist_lock.
450 (parport_register_device): Make sure that port->devices always
451 looks consistent.
452 (parport_register_driver): Ensure that parport drivers are given
453 parameters that are valid for the duration of the callback by
454 locking the portlist against changes.
455 (parport_unregister_driver): Likewise.
456 (parport_claim): Don't overwrite flags.
457
4582000-05-28 Tim Waugh <twaugh@redhat.com>
459
460 * daisy.c (assign_addrs): Avoid double-probing daisy-chain devices
461 if the first probe succeeds.
462
4632000-05-16 Tim Waugh <twaugh@redhat.com>
464
465 * share.c (parport_claim): Fix SMP race.
466
4672000-05-15 Gunther Mayer <gunther.mayer@braunschweig.okersurf.de>
468
469 * parport_pc.c (parport_pc_compat_write_block_pio): Check for
470 timeouts.
471 (parport_pc_ecp_write_block_pio): Likewise.
472 (parport_pc_ecp_read_block_pio): Likewise.
473
4742000-05-02 Gunther Mayer <gunther.mayer@braunschweig.okersurf.de>
475
476 * parport_pc.c: PCI SYBA patch and verbose PCI detection.
477
4782000-05-02 Gunther Mayer <gunther.mayer@braunschweig.okersurf.de>
479
480 * parport_pc.c (decode_smsc): Fix SMSC 665/666 identification.
481
4822000-04-28 Tim Waugh <twaugh@redhat.com>
483
484 * ieee1284.c: Short function descriptions can't be multiline.
485
486 * daisy.c: Short function descriptions can't be multiline.
487
4882000-04-19 Tim Waugh <twaugh@redhat.com>
489
490 * parport_pc.c (parport_pc_fifo_write_block_dma): Make maxlen
491 calculation a bit clearer.
492
493 * ieee1284.c (parport_negotiate): Turn on data line drivers.
494
495 * ieee1284_ops.c (parport_ieee1284_read_byte): Turn off data line
496 drivers.
497 (parport_ieee1284_write_compat): Turn on data line drivers.
498
499 * daisy.c (assign_addrs): Turn on data line drivers.
500 (cpp_mux): Likewise.
501 (cpp_daisy): Likewise.
502
5032000-04-04 Tim Waugh <twaugh@redhat.com>
504
505 * parport_pc.c: Add support for another PCI card.
506
5072000-04-04 Tim Waugh <twaugh@redhat.com>
508
509 * daisy.c: Documentation in kernel-doc format.
510
511 * ieee1284.c: Likewise.
512
513 * share.c: Likewise.
514
5152000-04-01 Tim Waugh <twaugh@redhat.com>
516
517 * share.c (parport_register_device): Need to hold the module
518 reference counts before sleeping.
519
5202000-03-27 Tim Waugh <twaugh@redhat.com>
521
522 * parport_pc.c (parport_pc_ecp_read_block_pio): Correct operation
523 when peripheral is trying to send data when we stop listening.
524
5252000-03-22 Tim Waugh <twaugh@redhat.com>
526
527 * init.c (parport_setup): Fix return value.
528
5292000-03-21 Tim Waugh <twaugh@redhat.com>
530
531 * parport_pc.c (parport_pc_pci_probe): Fix return value; call
532 pci_enable_device.
533
5342000-03-16 Tim Waugh <twaugh@redhat.com>
535
536 * parport_pc.c (parport_ECP_supported): This seems to trigger on
537 machines that don't have an IRQ conflict; toned down the warning
538 message accordingly.
539
5402000-03-16 Gunther Mayer <gunther.mayer@braunschweig.netsurf.de>
541
542 * parport_pc.c (show_parconfig_smsc37c669): Fix typo.
543 (decode_winbond): More IDs.
544 (winbond_check): Protect against false positives.
545 (winbond_check2): Likewise.
546 (smsc_check): Likewise.
547
5482000-03-15 Tim Waugh <twaugh@redhat.com>
549
550 * parport_pc.c (cleanup_module): Don't call pci_unregister_driver
551 if we didn't call pci_register_driver first.
552
5532000-03-13 Tim Waugh <twaugh@redhat.com>
554
555 * parport_pc.c (parport_pc_init): Moved from asm/parport.h.
556
557 * Config.in: CONFIG_PARPORT_PC_SUPERIO: new option.
558
559 * parport_pc.c (show_parconfig_smsc37c669): Make __devinit.
560 (show_parconfig_winbond): Likewise.
561 (decode_winbond): Likewise.
562 (decode_smsc): Likewise.
563 (winbond_check): Likewise.
564 (winbond_check2): Likewise.
565 (smsc_check): Likewise.
566 (detect_and_report_winbond): Likewise.
567 (detect_and_report_smsc): Likewise.
568 (get_superio_dma): Likewise.
569 (get_superio_irq): Likewise.
570 (parport_pc_find_isa_ports): New function.
571 (parport_pc_find_ports): New function.
572 (init_module): Make superio a config option, not a parameter.
573
5742000-03-10 Tim Waugh <twaugh@redhat.com>
575
576 * parport_pc.c (decode_winbond): Use correct 83877ATF chip ID.
577 (decode_winbond): Fix typo.
578
5792000-03-09 Tim Waugh <twaugh@redhat.com>
580
581 * parport_pc.c: Integrate SuperIO PCI probe with normal PCI card
582 probe, so that the MODULE_DEVICE_TABLE is complete.
583
diff --git a/drivers/parport/Kconfig b/drivers/parport/Kconfig
new file mode 100644
index 000000000000..731010e0e6f6
--- /dev/null
+++ b/drivers/parport/Kconfig
@@ -0,0 +1,145 @@
1#
2# For a description of the syntax of this configuration file,
3# see Documentation/kbuild/kconfig-language.txt.
4#
5# Parport configuration.
6#
7
8menu "Parallel port support"
9
10config PARPORT
11 tristate "Parallel port support"
12 ---help---
13 If you want to use devices connected to your machine's parallel port
14 (the connector at the computer with 25 holes), e.g. printer, ZIP
15 drive, PLIP link (Parallel Line Internet Protocol is mainly used to
16 create a mini network by connecting the parallel ports of two local
17 machines) etc., then you need to say Y here; please read
18 <file:Documentation/parport.txt> and
19 <file:drivers/parport/BUGS-parport>.
20
21 For extensive information about drivers for many devices attaching
22 to the parallel port see <http://www.torque.net/linux-pp.html> on
23 the WWW.
24
25 It is possible to share a single parallel port among several devices
26 and it is safe to compile all the corresponding drivers into the
27 kernel. To compile parallel port support as a module, choose M here:
28 the module will be called parport.
29 If you have more than one parallel port and want to specify which
30 port and IRQ to be used by this driver at module load time, take a
31 look at <file:Documentation/parport.txt>.
32
33 If unsure, say Y.
34
35config PARPORT_PC
36 tristate "PC-style hardware"
37 depends on PARPORT && (!SPARC64 || PCI) && (!SPARC32 || BROKEN)
38 ---help---
39 You should say Y here if you have a PC-style parallel port. All
40 IBM PC compatible computers and some Alphas have PC-style
41 parallel ports. PA-RISC owners should only say Y here if they
42 have a SuperIO parallel port.
43
44 To compile this driver as a module, choose M here: the
45 module will be called parport_pc.
46
47 If unsure, say Y.
48
49config PARPORT_SERIAL
50 tristate "Multi-IO cards (parallel and serial)"
51 depends on SERIAL_8250 && PARPORT_PC && PCI
52 help
53 This adds support for multi-IO PCI cards that have parallel and
54 serial ports. You should say Y or M here. If you say M, the module
55 will be called parport_serial.
56
57config PARPORT_PC_FIFO
58 bool "Use FIFO/DMA if available (EXPERIMENTAL)"
59 depends on PARPORT_PC && EXPERIMENTAL
60 help
61 Many parallel port chipsets provide hardware that can speed up
62 printing. Say Y here if you want to take advantage of that.
63
64 As well as actually having a FIFO, or DMA capability, the kernel
65 will need to know which IRQ the parallel port has. By default,
66 parallel port interrupts will not be used, and so neither will the
67 FIFO. See <file:Documentation/parport.txt> to find out how to
68 specify which IRQ/DMA to use.
69
70config PARPORT_PC_SUPERIO
71 bool "SuperIO chipset support (EXPERIMENTAL)"
72 depends on PARPORT_PC && EXPERIMENTAL
73 help
74 Saying Y here enables some probes for Super-IO chipsets in order to
75 find out things like base addresses, IRQ lines and DMA channels. It
76 is safe to say N.
77
78config PARPORT_PC_PCMCIA
79 tristate "Support for PCMCIA management for PC-style ports"
80 depends on PARPORT!=n && (PCMCIA!=n && PARPORT_PC=m && PARPORT_PC || PARPORT_PC=y && PCMCIA)
81 help
82 Say Y here if you need PCMCIA support for your PC-style parallel
83 ports. If unsure, say N.
84
85config PARPORT_NOT_PC
86 bool
87
88config PARPORT_ARC
89 tristate "Archimedes hardware"
90 depends on ARM && PARPORT
91 select PARPORT_NOT_PC
92
93config PARPORT_AMIGA
94 tristate "Amiga builtin port"
95 depends on AMIGA && PARPORT
96 select PARPORT_NOT_PC
97 help
98 Say Y here if you need support for the parallel port hardware on
99 Amiga machines. This code is also available as a module (say M),
100 called parport_amiga. If in doubt, saying N is the safe plan.
101
102config PARPORT_MFC3
103 tristate "Multiface III parallel port"
104 depends on ZORRO && PARPORT
105 select PARPORT_NOT_PC
106 help
107 Say Y here if you need parallel port support for the MFC3 card.
108 This code is also available as a module (say M), called
109 parport_mfc3. If in doubt, saying N is the safe plan.
110
111config PARPORT_ATARI
112 tristate "Atari hardware"
113 depends on ATARI && PARPORT
114 select PARPORT_NOT_PC
115 help
116 Say Y here if you need support for the parallel port hardware on
117 Atari machines. This code is also available as a module (say M),
118 called parport_atari. If in doubt, saying N is the safe plan.
119
120config PARPORT_GSC
121 tristate
122 default GSC
123 depends on PARPORT
124
125config PARPORT_SUNBPP
126 tristate "Sparc hardware (EXPERIMENTAL)"
127 depends on SBUS && PARPORT && EXPERIMENTAL
128 select PARPORT_NOT_PC
129 help
130 This driver provides support for the bidirectional parallel port
131 found on many Sun machines. Note that many of the newer Ultras
132 actually have pc style hardware instead.
133
134config PARPORT_1284
135 bool "IEEE 1284 transfer modes"
136 depends on PARPORT
137 help
138 If you have a printer that supports status readback or device ID, or
139 want to use a device that uses enhanced parallel port transfer modes
140 such as EPP and ECP, say Y here to enable advanced IEEE 1284
141 transfer modes. Also say Y if you want device ID information to
142 appear in /proc/sys/dev/parport/*/autoprobe*. It is safe to say N.
143
144endmenu
145
diff --git a/drivers/parport/Makefile b/drivers/parport/Makefile
new file mode 100644
index 000000000000..5372212bb9d9
--- /dev/null
+++ b/drivers/parport/Makefile
@@ -0,0 +1,19 @@
1#
2# Makefile for the kernel Parallel port device drivers.
3#
4
5parport-objs := share.o ieee1284.o ieee1284_ops.o procfs.o
6
7ifeq ($(CONFIG_PARPORT_1284),y)
8 parport-objs += daisy.o probe.o
9endif
10
11obj-$(CONFIG_PARPORT) += parport.o
12obj-$(CONFIG_PARPORT_PC) += parport_pc.o
13obj-$(CONFIG_PARPORT_SERIAL) += parport_serial.o
14obj-$(CONFIG_PARPORT_PC_PCMCIA) += parport_cs.o
15obj-$(CONFIG_PARPORT_AMIGA) += parport_amiga.o
16obj-$(CONFIG_PARPORT_MFC3) += parport_mfc3.o
17obj-$(CONFIG_PARPORT_ATARI) += parport_atari.o
18obj-$(CONFIG_PARPORT_SUNBPP) += parport_sunbpp.o
19obj-$(CONFIG_PARPORT_GSC) += parport_gsc.o
diff --git a/drivers/parport/TODO-parport b/drivers/parport/TODO-parport
new file mode 100644
index 000000000000..089b14ee446f
--- /dev/null
+++ b/drivers/parport/TODO-parport
@@ -0,0 +1,20 @@
1Things to be done.
2
30. Fix the bugs (see BUGS-parport).
4
51. Proper documentation.
6
72. A better lp.c:
8
9 a) ECP support would be nice. This can only work if both the port and
10 the printer support it.
11
12 b) Handle status readback automatically. IEEE1284 printers can post status
13 bits when they have something to say. We should read out and deal
14 with (maybe just log) whatever the printer wants to tell the world.
15
163. Support more hardware (eg m68k, Sun bpp).
17
184. A better PLIP (make use of bidirectional/ECP/EPP ports).
19
20See <URL:http://people.redhat.com/twaugh/parport/>.
diff --git a/drivers/parport/daisy.c b/drivers/parport/daisy.c
new file mode 100644
index 000000000000..075c7eb5c85d
--- /dev/null
+++ b/drivers/parport/daisy.c
@@ -0,0 +1,512 @@
1/*
2 * IEEE 1284.3 Parallel port daisy chain and multiplexor code
3 *
4 * Copyright (C) 1999, 2000 Tim Waugh <tim@cyberelk.demon.co.uk>
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
10 *
11 * ??-12-1998: Initial implementation.
12 * 31-01-1999: Make port-cloning transparent.
13 * 13-02-1999: Move DeviceID technique from parport_probe.
14 * 13-03-1999: Get DeviceID from non-IEEE 1284.3 devices too.
15 * 22-02-2000: Count devices that are actually detected.
16 *
17 * Any part of this program may be used in documents licensed under
18 * the GNU Free Documentation License, Version 1.1 or any later version
19 * published by the Free Software Foundation.
20 */
21
22#include <linux/module.h>
23#include <linux/parport.h>
24#include <linux/delay.h>
25#include <linux/sched.h>
26
27#include <asm/current.h>
28#include <asm/uaccess.h>
29
30#undef DEBUG
31
32#ifdef DEBUG
33#define DPRINTK(stuff...) printk (stuff)
34#else
35#define DPRINTK(stuff...)
36#endif
37
38static struct daisydev {
39 struct daisydev *next;
40 struct parport *port;
41 int daisy;
42 int devnum;
43} *topology = NULL;
44static DEFINE_SPINLOCK(topology_lock);
45
46static int numdevs = 0;
47
48/* Forward-declaration of lower-level functions. */
49static int mux_present (struct parport *port);
50static int num_mux_ports (struct parport *port);
51static int select_port (struct parport *port);
52static int assign_addrs (struct parport *port);
53
54/* Add a device to the discovered topology. */
55static void add_dev (int devnum, struct parport *port, int daisy)
56{
57 struct daisydev *newdev, **p;
58 newdev = kmalloc (sizeof (struct daisydev), GFP_KERNEL);
59 if (newdev) {
60 newdev->port = port;
61 newdev->daisy = daisy;
62 newdev->devnum = devnum;
63 spin_lock(&topology_lock);
64 for (p = &topology; *p && (*p)->devnum<devnum; p = &(*p)->next)
65 ;
66 newdev->next = *p;
67 *p = newdev;
68 spin_unlock(&topology_lock);
69 }
70}
71
72/* Clone a parport (actually, make an alias). */
73static struct parport *clone_parport (struct parport *real, int muxport)
74{
75 struct parport *extra = parport_register_port (real->base,
76 real->irq,
77 real->dma,
78 real->ops);
79 if (extra) {
80 extra->portnum = real->portnum;
81 extra->physport = real;
82 extra->muxport = muxport;
83 real->slaves[muxport-1] = extra;
84 }
85
86 return extra;
87}
88
89/* Discover the IEEE1284.3 topology on a port -- muxes and daisy chains.
90 * Return value is number of devices actually detected. */
91int parport_daisy_init (struct parport *port)
92{
93 int detected = 0;
94 char *deviceid;
95 static const char *th[] = { /*0*/"th", "st", "nd", "rd", "th" };
96 int num_ports;
97 int i;
98 int last_try = 0;
99
100again:
101 /* Because this is called before any other devices exist,
102 * we don't have to claim exclusive access. */
103
104 /* If mux present on normal port, need to create new
105 * parports for each extra port. */
106 if (port->muxport < 0 && mux_present (port) &&
107 /* don't be fooled: a mux must have 2 or 4 ports. */
108 ((num_ports = num_mux_ports (port)) == 2 || num_ports == 4)) {
109 /* Leave original as port zero. */
110 port->muxport = 0;
111 printk (KERN_INFO
112 "%s: 1st (default) port of %d-way multiplexor\n",
113 port->name, num_ports);
114 for (i = 1; i < num_ports; i++) {
115 /* Clone the port. */
116 struct parport *extra = clone_parport (port, i);
117 if (!extra) {
118 if (signal_pending (current))
119 break;
120
121 schedule ();
122 continue;
123 }
124
125 printk (KERN_INFO
126 "%s: %d%s port of %d-way multiplexor on %s\n",
127 extra->name, i + 1, th[i + 1], num_ports,
128 port->name);
129
130 /* Analyse that port too. We won't recurse
131 forever because of the 'port->muxport < 0'
132 test above. */
133 parport_daisy_init(extra);
134 }
135 }
136
137 if (port->muxport >= 0)
138 select_port (port);
139
140 parport_daisy_deselect_all (port);
141 detected += assign_addrs (port);
142
143 /* Count the potential legacy device at the end. */
144 add_dev (numdevs++, port, -1);
145
146 /* Find out the legacy device's IEEE 1284 device ID. */
147 deviceid = kmalloc (1000, GFP_KERNEL);
148 if (deviceid) {
149 if (parport_device_id (numdevs - 1, deviceid, 1000) > 2)
150 detected++;
151
152 kfree (deviceid);
153 }
154
155 if (!detected && !last_try) {
156 /* No devices were detected. Perhaps they are in some
157 funny state; let's try to reset them and see if
158 they wake up. */
159 parport_daisy_fini (port);
160 parport_write_control (port, PARPORT_CONTROL_SELECT);
161 udelay (50);
162 parport_write_control (port,
163 PARPORT_CONTROL_SELECT |
164 PARPORT_CONTROL_INIT);
165 udelay (50);
166 last_try = 1;
167 goto again;
168 }
169
170 return detected;
171}
172
173/* Forget about devices on a physical port. */
174void parport_daisy_fini (struct parport *port)
175{
176 struct daisydev **p;
177
178 spin_lock(&topology_lock);
179 p = &topology;
180 while (*p) {
181 struct daisydev *dev = *p;
182 if (dev->port != port) {
183 p = &dev->next;
184 continue;
185 }
186 *p = dev->next;
187 kfree(dev);
188 }
189
190 /* Gaps in the numbering could be handled better. How should
191 someone enumerate through all IEEE1284.3 devices in the
192 topology?. */
193 if (!topology) numdevs = 0;
194 spin_unlock(&topology_lock);
195 return;
196}
197
198/**
199 * parport_open - find a device by canonical device number
200 * @devnum: canonical device number
201 * @name: name to associate with the device
202 * @pf: preemption callback
203 * @kf: kick callback
204 * @irqf: interrupt handler
205 * @flags: registration flags
206 * @handle: driver data
207 *
208 * This function is similar to parport_register_device(), except
209 * that it locates a device by its number rather than by the port
210 * it is attached to.
211 *
212 * All parameters except for @devnum are the same as for
213 * parport_register_device(). The return value is the same as
214 * for parport_register_device().
215 **/
216
217struct pardevice *parport_open (int devnum, const char *name,
218 int (*pf) (void *), void (*kf) (void *),
219 void (*irqf) (int, void *, struct pt_regs *),
220 int flags, void *handle)
221{
222 struct daisydev *p = topology;
223 struct parport *port;
224 struct pardevice *dev;
225 int daisy;
226
227 spin_lock(&topology_lock);
228 while (p && p->devnum != devnum)
229 p = p->next;
230
231 if (!p) {
232 spin_unlock(&topology_lock);
233 return NULL;
234 }
235
236 daisy = p->daisy;
237 port = parport_get_port(p->port);
238 spin_unlock(&topology_lock);
239
240 dev = parport_register_device (port, name, pf, kf,
241 irqf, flags, handle);
242 parport_put_port(port);
243 if (!dev)
244 return NULL;
245
246 dev->daisy = daisy;
247
248 /* Check that there really is a device to select. */
249 if (daisy >= 0) {
250 int selected;
251 parport_claim_or_block (dev);
252 selected = port->daisy;
253 parport_release (dev);
254
255 if (selected != port->daisy) {
256 /* No corresponding device. */
257 parport_unregister_device (dev);
258 return NULL;
259 }
260 }
261
262 return dev;
263}
264
265/**
266 * parport_close - close a device opened with parport_open()
267 * @dev: device to close
268 *
269 * This is to parport_open() as parport_unregister_device() is to
270 * parport_register_device().
271 **/
272
273void parport_close (struct pardevice *dev)
274{
275 parport_unregister_device (dev);
276}
277
278/**
279 * parport_device_num - convert device coordinates
280 * @parport: parallel port number
281 * @mux: multiplexor port number (-1 for no multiplexor)
282 * @daisy: daisy chain address (-1 for no daisy chain address)
283 *
284 * This tries to locate a device on the given parallel port,
285 * multiplexor port and daisy chain address, and returns its
286 * device number or -NXIO if no device with those coordinates
287 * exists.
288 **/
289
290int parport_device_num (int parport, int mux, int daisy)
291{
292 int res = -ENXIO;
293 struct daisydev *dev;
294
295 spin_lock(&topology_lock);
296 dev = topology;
297 while (dev && dev->port->portnum != parport &&
298 dev->port->muxport != mux && dev->daisy != daisy)
299 dev = dev->next;
300 if (dev)
301 res = dev->devnum;
302 spin_unlock(&topology_lock);
303
304 return res;
305}
306
307/* Send a daisy-chain-style CPP command packet. */
308static int cpp_daisy (struct parport *port, int cmd)
309{
310 unsigned char s;
311
312 parport_data_forward (port);
313 parport_write_data (port, 0xaa); udelay (2);
314 parport_write_data (port, 0x55); udelay (2);
315 parport_write_data (port, 0x00); udelay (2);
316 parport_write_data (port, 0xff); udelay (2);
317 s = parport_read_status (port) & (PARPORT_STATUS_BUSY
318 | PARPORT_STATUS_PAPEROUT
319 | PARPORT_STATUS_SELECT
320 | PARPORT_STATUS_ERROR);
321 if (s != (PARPORT_STATUS_BUSY
322 | PARPORT_STATUS_PAPEROUT
323 | PARPORT_STATUS_SELECT
324 | PARPORT_STATUS_ERROR)) {
325 DPRINTK (KERN_DEBUG "%s: cpp_daisy: aa5500ff(%02x)\n",
326 port->name, s);
327 return -ENXIO;
328 }
329
330 parport_write_data (port, 0x87); udelay (2);
331 s = parport_read_status (port) & (PARPORT_STATUS_BUSY
332 | PARPORT_STATUS_PAPEROUT
333 | PARPORT_STATUS_SELECT
334 | PARPORT_STATUS_ERROR);
335 if (s != (PARPORT_STATUS_SELECT | PARPORT_STATUS_ERROR)) {
336 DPRINTK (KERN_DEBUG "%s: cpp_daisy: aa5500ff87(%02x)\n",
337 port->name, s);
338 return -ENXIO;
339 }
340
341 parport_write_data (port, 0x78); udelay (2);
342 parport_write_data (port, cmd); udelay (2);
343 parport_frob_control (port,
344 PARPORT_CONTROL_STROBE,
345 PARPORT_CONTROL_STROBE);
346 udelay (1);
347 parport_frob_control (port, PARPORT_CONTROL_STROBE, 0);
348 udelay (1);
349 s = parport_read_status (port);
350 parport_write_data (port, 0xff); udelay (2);
351
352 return s;
353}
354
355/* Send a mux-style CPP command packet. */
356static int cpp_mux (struct parport *port, int cmd)
357{
358 unsigned char s;
359 int rc;
360
361 parport_data_forward (port);
362 parport_write_data (port, 0xaa); udelay (2);
363 parport_write_data (port, 0x55); udelay (2);
364 parport_write_data (port, 0xf0); udelay (2);
365 parport_write_data (port, 0x0f); udelay (2);
366 parport_write_data (port, 0x52); udelay (2);
367 parport_write_data (port, 0xad); udelay (2);
368 parport_write_data (port, cmd); udelay (2);
369
370 s = parport_read_status (port);
371 if (!(s & PARPORT_STATUS_ACK)) {
372 DPRINTK (KERN_DEBUG "%s: cpp_mux: aa55f00f52ad%02x(%02x)\n",
373 port->name, cmd, s);
374 return -EIO;
375 }
376
377 rc = (((s & PARPORT_STATUS_SELECT ? 1 : 0) << 0) |
378 ((s & PARPORT_STATUS_PAPEROUT ? 1 : 0) << 1) |
379 ((s & PARPORT_STATUS_BUSY ? 0 : 1) << 2) |
380 ((s & PARPORT_STATUS_ERROR ? 0 : 1) << 3));
381
382 return rc;
383}
384
385void parport_daisy_deselect_all (struct parport *port)
386{
387 cpp_daisy (port, 0x30);
388}
389
390int parport_daisy_select (struct parport *port, int daisy, int mode)
391{
392 switch (mode)
393 {
394 // For these modes we should switch to EPP mode:
395 case IEEE1284_MODE_EPP:
396 case IEEE1284_MODE_EPPSL:
397 case IEEE1284_MODE_EPPSWE:
398 return (cpp_daisy (port, 0x20 + daisy) &
399 PARPORT_STATUS_ERROR);
400
401 // For these modes we should switch to ECP mode:
402 case IEEE1284_MODE_ECP:
403 case IEEE1284_MODE_ECPRLE:
404 case IEEE1284_MODE_ECPSWE:
405 return (cpp_daisy (port, 0xd0 + daisy) &
406 PARPORT_STATUS_ERROR);
407
408 // Nothing was told for BECP in Daisy chain specification.
409 // May be it's wise to use ECP?
410 case IEEE1284_MODE_BECP:
411 // Others use compat mode
412 case IEEE1284_MODE_NIBBLE:
413 case IEEE1284_MODE_BYTE:
414 case IEEE1284_MODE_COMPAT:
415 default:
416 return (cpp_daisy (port, 0xe0 + daisy) &
417 PARPORT_STATUS_ERROR);
418 }
419}
420
421static int mux_present (struct parport *port)
422{
423 return cpp_mux (port, 0x51) == 3;
424}
425
426static int num_mux_ports (struct parport *port)
427{
428 return cpp_mux (port, 0x58);
429}
430
431static int select_port (struct parport *port)
432{
433 int muxport = port->muxport;
434 return cpp_mux (port, 0x60 + muxport) == muxport;
435}
436
437static int assign_addrs (struct parport *port)
438{
439 unsigned char s, last_dev;
440 unsigned char daisy;
441 int thisdev = numdevs;
442 int detected;
443 char *deviceid;
444
445 parport_data_forward (port);
446 parport_write_data (port, 0xaa); udelay (2);
447 parport_write_data (port, 0x55); udelay (2);
448 parport_write_data (port, 0x00); udelay (2);
449 parport_write_data (port, 0xff); udelay (2);
450 s = parport_read_status (port) & (PARPORT_STATUS_BUSY
451 | PARPORT_STATUS_PAPEROUT
452 | PARPORT_STATUS_SELECT
453 | PARPORT_STATUS_ERROR);
454 if (s != (PARPORT_STATUS_BUSY
455 | PARPORT_STATUS_PAPEROUT
456 | PARPORT_STATUS_SELECT
457 | PARPORT_STATUS_ERROR)) {
458 DPRINTK (KERN_DEBUG "%s: assign_addrs: aa5500ff(%02x)\n",
459 port->name, s);
460 return 0;
461 }
462
463 parport_write_data (port, 0x87); udelay (2);
464 s = parport_read_status (port) & (PARPORT_STATUS_BUSY
465 | PARPORT_STATUS_PAPEROUT
466 | PARPORT_STATUS_SELECT
467 | PARPORT_STATUS_ERROR);
468 if (s != (PARPORT_STATUS_SELECT | PARPORT_STATUS_ERROR)) {
469 DPRINTK (KERN_DEBUG "%s: assign_addrs: aa5500ff87(%02x)\n",
470 port->name, s);
471 return 0;
472 }
473
474 parport_write_data (port, 0x78); udelay (2);
475 last_dev = 0; /* We've just been speaking to a device, so we
476 know there must be at least _one_ out there. */
477
478 for (daisy = 0; daisy < 4; daisy++) {
479 parport_write_data (port, daisy);
480 udelay (2);
481 parport_frob_control (port,
482 PARPORT_CONTROL_STROBE,
483 PARPORT_CONTROL_STROBE);
484 udelay (1);
485 parport_frob_control (port, PARPORT_CONTROL_STROBE, 0);
486 udelay (1);
487
488 if (last_dev)
489 /* No more devices. */
490 break;
491
492 last_dev = !(parport_read_status (port)
493 & PARPORT_STATUS_BUSY);
494
495 add_dev (numdevs++, port, daisy);
496 }
497
498 parport_write_data (port, 0xff); udelay (2);
499 detected = numdevs - thisdev;
500 DPRINTK (KERN_DEBUG "%s: Found %d daisy-chained devices\n", port->name,
501 detected);
502
503 /* Ask the new devices to introduce themselves. */
504 deviceid = kmalloc (1000, GFP_KERNEL);
505 if (!deviceid) return 0;
506
507 for (daisy = 0; thisdev < numdevs; thisdev++, daisy++)
508 parport_device_id (thisdev, deviceid, 1000);
509
510 kfree (deviceid);
511 return detected;
512}
diff --git a/drivers/parport/ieee1284.c b/drivers/parport/ieee1284.c
new file mode 100644
index 000000000000..694bae162fed
--- /dev/null
+++ b/drivers/parport/ieee1284.c
@@ -0,0 +1,819 @@
1/* $Id: parport_ieee1284.c,v 1.4 1997/10/19 21:37:21 philip Exp $
2 * IEEE-1284 implementation for parport.
3 *
4 * Authors: Phil Blundell <philb@gnu.org>
5 * Carsten Gross <carsten@sol.wohnheim.uni-ulm.de>
6 * Jose Renau <renau@acm.org>
7 * Tim Waugh <tim@cyberelk.demon.co.uk> (largely rewritten)
8 *
9 * This file is responsible for IEEE 1284 negotiation, and for handing
10 * read/write requests to low-level drivers.
11 *
12 * Any part of this program may be used in documents licensed under
13 * the GNU Free Documentation License, Version 1.1 or any later version
14 * published by the Free Software Foundation.
15 *
16 * Various hacks, Fred Barnes <frmb2@ukc.ac.uk>, 04/2000
17 */
18
19#include <linux/config.h>
20#include <linux/module.h>
21#include <linux/threads.h>
22#include <linux/parport.h>
23#include <linux/delay.h>
24#include <linux/kernel.h>
25#include <linux/interrupt.h>
26#include <linux/timer.h>
27#include <linux/sched.h>
28
29#undef DEBUG /* undef me for production */
30
31#ifdef CONFIG_LP_CONSOLE
32#undef DEBUG /* Don't want a garbled console */
33#endif
34
35#ifdef DEBUG
36#define DPRINTK(stuff...) printk (stuff)
37#else
38#define DPRINTK(stuff...)
39#endif
40
41/* Make parport_wait_peripheral wake up.
42 * It will be useful to call this from an interrupt handler. */
43static void parport_ieee1284_wakeup (struct parport *port)
44{
45 up (&port->physport->ieee1284.irq);
46}
47
48static struct parport *port_from_cookie[PARPORT_MAX];
49static void timeout_waiting_on_port (unsigned long cookie)
50{
51 parport_ieee1284_wakeup (port_from_cookie[cookie % PARPORT_MAX]);
52}
53
54/**
55 * parport_wait_event - wait for an event on a parallel port
56 * @port: port to wait on
57 * @timeout: time to wait (in jiffies)
58 *
59 * This function waits for up to @timeout jiffies for an
60 * interrupt to occur on a parallel port. If the port timeout is
61 * set to zero, it returns immediately.
62 *
63 * If an interrupt occurs before the timeout period elapses, this
64 * function returns one immediately. If it times out, it returns
65 * a value greater than zero. An error code less than zero
66 * indicates an error (most likely a pending signal), and the
67 * calling code should finish what it's doing as soon as it can.
68 */
69
70int parport_wait_event (struct parport *port, signed long timeout)
71{
72 int ret;
73 struct timer_list timer;
74
75 if (!port->physport->cad->timeout)
76 /* Zero timeout is special, and we can't down() the
77 semaphore. */
78 return 1;
79
80 init_timer (&timer);
81 timer.expires = jiffies + timeout;
82 timer.function = timeout_waiting_on_port;
83 port_from_cookie[port->number % PARPORT_MAX] = port;
84 timer.data = port->number;
85
86 add_timer (&timer);
87 ret = down_interruptible (&port->physport->ieee1284.irq);
88 if (!del_timer (&timer) && !ret)
89 /* Timed out. */
90 ret = 1;
91
92 return ret;
93}
94
95/**
96 * parport_poll_peripheral - poll status lines
97 * @port: port to watch
98 * @mask: status lines to watch
99 * @result: desired values of chosen status lines
100 * @usec: timeout
101 *
102 * This function busy-waits until the masked status lines have
103 * the desired values, or until the timeout period elapses. The
104 * @mask and @result parameters are bitmasks, with the bits
105 * defined by the constants in parport.h: %PARPORT_STATUS_BUSY,
106 * and so on.
107 *
108 * This function does not call schedule(); instead it busy-waits
109 * using udelay(). It currently has a resolution of 5usec.
110 *
111 * If the status lines take on the desired values before the
112 * timeout period elapses, parport_poll_peripheral() returns zero
113 * immediately. A zero return value greater than zero indicates
114 * a timeout. An error code (less than zero) indicates an error,
115 * most likely a signal that arrived, and the caller should
116 * finish what it is doing as soon as possible.
117*/
118
119int parport_poll_peripheral(struct parport *port,
120 unsigned char mask,
121 unsigned char result,
122 int usec)
123{
124 /* Zero return code is success, >0 is timeout. */
125 int count = usec / 5 + 2;
126 int i;
127 unsigned char status;
128 for (i = 0; i < count; i++) {
129 status = parport_read_status (port);
130 if ((status & mask) == result)
131 return 0;
132 if (signal_pending (current))
133 return -EINTR;
134 if (need_resched())
135 break;
136 if (i >= 2)
137 udelay (5);
138 }
139
140 return 1;
141}
142
143/**
144 * parport_wait_peripheral - wait for status lines to change in 35ms
145 * @port: port to watch
146 * @mask: status lines to watch
147 * @result: desired values of chosen status lines
148 *
149 * This function waits until the masked status lines have the
150 * desired values, or until 35ms have elapsed (see IEEE 1284-1994
151 * page 24 to 25 for why this value in particular is hardcoded).
152 * The @mask and @result parameters are bitmasks, with the bits
153 * defined by the constants in parport.h: %PARPORT_STATUS_BUSY,
154 * and so on.
155 *
156 * The port is polled quickly to start off with, in anticipation
157 * of a fast response from the peripheral. This fast polling
158 * time is configurable (using /proc), and defaults to 500usec.
159 * If the timeout for this port (see parport_set_timeout()) is
160 * zero, the fast polling time is 35ms, and this function does
161 * not call schedule().
162 *
163 * If the timeout for this port is non-zero, after the fast
164 * polling fails it uses parport_wait_event() to wait for up to
165 * 10ms, waking up if an interrupt occurs.
166 */
167
168int parport_wait_peripheral(struct parport *port,
169 unsigned char mask,
170 unsigned char result)
171{
172 int ret;
173 int usec;
174 unsigned long deadline;
175 unsigned char status;
176
177 usec = port->physport->spintime; /* usecs of fast polling */
178 if (!port->physport->cad->timeout)
179 /* A zero timeout is "special": busy wait for the
180 entire 35ms. */
181 usec = 35000;
182
183 /* Fast polling.
184 *
185 * This should be adjustable.
186 * How about making a note (in the device structure) of how long
187 * it takes, so we know for next time?
188 */
189 ret = parport_poll_peripheral (port, mask, result, usec);
190 if (ret != 1)
191 return ret;
192
193 if (!port->physport->cad->timeout)
194 /* We may be in an interrupt handler, so we can't poll
195 * slowly anyway. */
196 return 1;
197
198 /* 40ms of slow polling. */
199 deadline = jiffies + (HZ + 24) / 25;
200 while (time_before (jiffies, deadline)) {
201 int ret;
202
203 if (signal_pending (current))
204 return -EINTR;
205
206 /* Wait for 10ms (or until an interrupt occurs if
207 * the handler is set) */
208 if ((ret = parport_wait_event (port, (HZ + 99) / 100)) < 0)
209 return ret;
210
211 status = parport_read_status (port);
212 if ((status & mask) == result)
213 return 0;
214
215 if (!ret) {
216 /* parport_wait_event didn't time out, but the
217 * peripheral wasn't actually ready either.
218 * Wait for another 10ms. */
219 __set_current_state (TASK_INTERRUPTIBLE);
220 schedule_timeout ((HZ+ 99) / 100);
221 }
222 }
223
224 return 1;
225}
226
227#ifdef CONFIG_PARPORT_1284
228/* Terminate a negotiated mode. */
229static void parport_ieee1284_terminate (struct parport *port)
230{
231 int r;
232 port = port->physport;
233
234 /* EPP terminates differently. */
235 switch (port->ieee1284.mode) {
236 case IEEE1284_MODE_EPP:
237 case IEEE1284_MODE_EPPSL:
238 case IEEE1284_MODE_EPPSWE:
239 /* Terminate from EPP mode. */
240
241 /* Event 68: Set nInit low */
242 parport_frob_control (port, PARPORT_CONTROL_INIT, 0);
243 udelay (50);
244
245 /* Event 69: Set nInit high, nSelectIn low */
246 parport_frob_control (port,
247 PARPORT_CONTROL_SELECT
248 | PARPORT_CONTROL_INIT,
249 PARPORT_CONTROL_SELECT
250 | PARPORT_CONTROL_INIT);
251 break;
252
253 case IEEE1284_MODE_ECP:
254 case IEEE1284_MODE_ECPRLE:
255 case IEEE1284_MODE_ECPSWE:
256 /* In ECP we can only terminate from fwd idle phase. */
257 if (port->ieee1284.phase != IEEE1284_PH_FWD_IDLE) {
258 /* Event 47: Set nInit high */
259 parport_frob_control (port,
260 PARPORT_CONTROL_INIT
261 | PARPORT_CONTROL_AUTOFD,
262 PARPORT_CONTROL_INIT
263 | PARPORT_CONTROL_AUTOFD);
264
265 /* Event 49: PError goes high */
266 r = parport_wait_peripheral (port,
267 PARPORT_STATUS_PAPEROUT,
268 PARPORT_STATUS_PAPEROUT);
269 if (r)
270 DPRINTK (KERN_INFO "%s: Timeout at event 49\n",
271 port->name);
272
273 parport_data_forward (port);
274 DPRINTK (KERN_DEBUG "%s: ECP direction: forward\n",
275 port->name);
276 port->ieee1284.phase = IEEE1284_PH_FWD_IDLE;
277 }
278
279 /* fall-though.. */
280
281 default:
282 /* Terminate from all other modes. */
283
284 /* Event 22: Set nSelectIn low, nAutoFd high */
285 parport_frob_control (port,
286 PARPORT_CONTROL_SELECT
287 | PARPORT_CONTROL_AUTOFD,
288 PARPORT_CONTROL_SELECT);
289
290 /* Event 24: nAck goes low */
291 r = parport_wait_peripheral (port, PARPORT_STATUS_ACK, 0);
292 if (r)
293 DPRINTK (KERN_INFO "%s: Timeout at event 24\n",
294 port->name);
295
296 /* Event 25: Set nAutoFd low */
297 parport_frob_control (port,
298 PARPORT_CONTROL_AUTOFD,
299 PARPORT_CONTROL_AUTOFD);
300
301 /* Event 27: nAck goes high */
302 r = parport_wait_peripheral (port,
303 PARPORT_STATUS_ACK,
304 PARPORT_STATUS_ACK);
305 if (r)
306 DPRINTK (KERN_INFO "%s: Timeout at event 27\n",
307 port->name);
308
309 /* Event 29: Set nAutoFd high */
310 parport_frob_control (port, PARPORT_CONTROL_AUTOFD, 0);
311 }
312
313 port->ieee1284.mode = IEEE1284_MODE_COMPAT;
314 port->ieee1284.phase = IEEE1284_PH_FWD_IDLE;
315
316 DPRINTK (KERN_DEBUG "%s: In compatibility (forward idle) mode\n",
317 port->name);
318}
319#endif /* IEEE1284 support */
320
321/**
322 * parport_negotiate - negotiate an IEEE 1284 mode
323 * @port: port to use
324 * @mode: mode to negotiate to
325 *
326 * Use this to negotiate to a particular IEEE 1284 transfer mode.
327 * The @mode parameter should be one of the constants in
328 * parport.h starting %IEEE1284_MODE_xxx.
329 *
330 * The return value is 0 if the peripheral has accepted the
331 * negotiation to the mode specified, -1 if the peripheral is not
332 * IEEE 1284 compliant (or not present), or 1 if the peripheral
333 * has rejected the negotiation.
334 */
335
336int parport_negotiate (struct parport *port, int mode)
337{
338#ifndef CONFIG_PARPORT_1284
339 if (mode == IEEE1284_MODE_COMPAT)
340 return 0;
341 printk (KERN_ERR "parport: IEEE1284 not supported in this kernel\n");
342 return -1;
343#else
344 int m = mode & ~IEEE1284_ADDR;
345 int r;
346 unsigned char xflag;
347
348 port = port->physport;
349
350 /* Is there anything to do? */
351 if (port->ieee1284.mode == mode)
352 return 0;
353
354 /* Is the difference just an address-or-not bit? */
355 if ((port->ieee1284.mode & ~IEEE1284_ADDR) == (mode & ~IEEE1284_ADDR)){
356 port->ieee1284.mode = mode;
357 return 0;
358 }
359
360 /* Go to compability forward idle mode */
361 if (port->ieee1284.mode != IEEE1284_MODE_COMPAT)
362 parport_ieee1284_terminate (port);
363
364 if (mode == IEEE1284_MODE_COMPAT)
365 /* Compatibility mode: no negotiation. */
366 return 0;
367
368 switch (mode) {
369 case IEEE1284_MODE_ECPSWE:
370 m = IEEE1284_MODE_ECP;
371 break;
372 case IEEE1284_MODE_EPPSL:
373 case IEEE1284_MODE_EPPSWE:
374 m = IEEE1284_MODE_EPP;
375 break;
376 case IEEE1284_MODE_BECP:
377 return -ENOSYS; /* FIXME (implement BECP) */
378 }
379
380 if (mode & IEEE1284_EXT_LINK)
381 m = 1<<7; /* request extensibility link */
382
383 port->ieee1284.phase = IEEE1284_PH_NEGOTIATION;
384
385 /* Start off with nStrobe and nAutoFd high, and nSelectIn low */
386 parport_frob_control (port,
387 PARPORT_CONTROL_STROBE
388 | PARPORT_CONTROL_AUTOFD
389 | PARPORT_CONTROL_SELECT,
390 PARPORT_CONTROL_SELECT);
391 udelay(1);
392
393 /* Event 0: Set data */
394 parport_data_forward (port);
395 parport_write_data (port, m);
396 udelay (400); /* Shouldn't need to wait this long. */
397
398 /* Event 1: Set nSelectIn high, nAutoFd low */
399 parport_frob_control (port,
400 PARPORT_CONTROL_SELECT
401 | PARPORT_CONTROL_AUTOFD,
402 PARPORT_CONTROL_AUTOFD);
403
404 /* Event 2: PError, Select, nFault go high, nAck goes low */
405 if (parport_wait_peripheral (port,
406 PARPORT_STATUS_ERROR
407 | PARPORT_STATUS_SELECT
408 | PARPORT_STATUS_PAPEROUT
409 | PARPORT_STATUS_ACK,
410 PARPORT_STATUS_ERROR
411 | PARPORT_STATUS_SELECT
412 | PARPORT_STATUS_PAPEROUT)) {
413 /* Timeout */
414 parport_frob_control (port,
415 PARPORT_CONTROL_SELECT
416 | PARPORT_CONTROL_AUTOFD,
417 PARPORT_CONTROL_SELECT);
418 DPRINTK (KERN_DEBUG
419 "%s: Peripheral not IEEE1284 compliant (0x%02X)\n",
420 port->name, parport_read_status (port));
421 port->ieee1284.phase = IEEE1284_PH_FWD_IDLE;
422 return -1; /* Not IEEE1284 compliant */
423 }
424
425 /* Event 3: Set nStrobe low */
426 parport_frob_control (port,
427 PARPORT_CONTROL_STROBE,
428 PARPORT_CONTROL_STROBE);
429
430 /* Event 4: Set nStrobe and nAutoFd high */
431 udelay (5);
432 parport_frob_control (port,
433 PARPORT_CONTROL_STROBE
434 | PARPORT_CONTROL_AUTOFD,
435 0);
436
437 /* Event 6: nAck goes high */
438 if (parport_wait_peripheral (port,
439 PARPORT_STATUS_ACK,
440 PARPORT_STATUS_ACK)) {
441 /* This shouldn't really happen with a compliant device. */
442 DPRINTK (KERN_DEBUG
443 "%s: Mode 0x%02x not supported? (0x%02x)\n",
444 port->name, mode, port->ops->read_status (port));
445 parport_ieee1284_terminate (port);
446 return 1;
447 }
448
449 xflag = parport_read_status (port) & PARPORT_STATUS_SELECT;
450
451 /* xflag should be high for all modes other than nibble (0). */
452 if (mode && !xflag) {
453 /* Mode not supported. */
454 DPRINTK (KERN_DEBUG "%s: Mode 0x%02x rejected by peripheral\n",
455 port->name, mode);
456 parport_ieee1284_terminate (port);
457 return 1;
458 }
459
460 /* More to do if we've requested extensibility link. */
461 if (mode & IEEE1284_EXT_LINK) {
462 m = mode & 0x7f;
463 udelay (1);
464 parport_write_data (port, m);
465 udelay (1);
466
467 /* Event 51: Set nStrobe low */
468 parport_frob_control (port,
469 PARPORT_CONTROL_STROBE,
470 PARPORT_CONTROL_STROBE);
471
472 /* Event 52: nAck goes low */
473 if (parport_wait_peripheral (port, PARPORT_STATUS_ACK, 0)) {
474 /* This peripheral is _very_ slow. */
475 DPRINTK (KERN_DEBUG
476 "%s: Event 52 didn't happen\n",
477 port->name);
478 parport_ieee1284_terminate (port);
479 return 1;
480 }
481
482 /* Event 53: Set nStrobe high */
483 parport_frob_control (port,
484 PARPORT_CONTROL_STROBE,
485 0);
486
487 /* Event 55: nAck goes high */
488 if (parport_wait_peripheral (port,
489 PARPORT_STATUS_ACK,
490 PARPORT_STATUS_ACK)) {
491 /* This shouldn't really happen with a compliant
492 * device. */
493 DPRINTK (KERN_DEBUG
494 "%s: Mode 0x%02x not supported? (0x%02x)\n",
495 port->name, mode,
496 port->ops->read_status (port));
497 parport_ieee1284_terminate (port);
498 return 1;
499 }
500
501 /* Event 54: Peripheral sets XFlag to reflect support */
502 xflag = parport_read_status (port) & PARPORT_STATUS_SELECT;
503
504 /* xflag should be high. */
505 if (!xflag) {
506 /* Extended mode not supported. */
507 DPRINTK (KERN_DEBUG "%s: Extended mode 0x%02x not "
508 "supported\n", port->name, mode);
509 parport_ieee1284_terminate (port);
510 return 1;
511 }
512
513 /* Any further setup is left to the caller. */
514 }
515
516 /* Mode is supported */
517 DPRINTK (KERN_DEBUG "%s: In mode 0x%02x\n", port->name, mode);
518 port->ieee1284.mode = mode;
519
520 /* But ECP is special */
521 if (!(mode & IEEE1284_EXT_LINK) && (m & IEEE1284_MODE_ECP)) {
522 port->ieee1284.phase = IEEE1284_PH_ECP_SETUP;
523
524 /* Event 30: Set nAutoFd low */
525 parport_frob_control (port,
526 PARPORT_CONTROL_AUTOFD,
527 PARPORT_CONTROL_AUTOFD);
528
529 /* Event 31: PError goes high. */
530 r = parport_wait_peripheral (port,
531 PARPORT_STATUS_PAPEROUT,
532 PARPORT_STATUS_PAPEROUT);
533 if (r) {
534 DPRINTK (KERN_INFO "%s: Timeout at event 31\n",
535 port->name);
536 }
537
538 port->ieee1284.phase = IEEE1284_PH_FWD_IDLE;
539 DPRINTK (KERN_DEBUG "%s: ECP direction: forward\n",
540 port->name);
541 } else switch (mode) {
542 case IEEE1284_MODE_NIBBLE:
543 case IEEE1284_MODE_BYTE:
544 port->ieee1284.phase = IEEE1284_PH_REV_IDLE;
545 break;
546 default:
547 port->ieee1284.phase = IEEE1284_PH_FWD_IDLE;
548 }
549
550
551 return 0;
552#endif /* IEEE1284 support */
553}
554
555/* Acknowledge that the peripheral has data available.
556 * Events 18-20, in order to get from Reverse Idle phase
557 * to Host Busy Data Available.
558 * This will most likely be called from an interrupt.
559 * Returns zero if data was available.
560 */
561#ifdef CONFIG_PARPORT_1284
562static int parport_ieee1284_ack_data_avail (struct parport *port)
563{
564 if (parport_read_status (port) & PARPORT_STATUS_ERROR)
565 /* Event 18 didn't happen. */
566 return -1;
567
568 /* Event 20: nAutoFd goes high. */
569 port->ops->frob_control (port, PARPORT_CONTROL_AUTOFD, 0);
570 port->ieee1284.phase = IEEE1284_PH_HBUSY_DAVAIL;
571 return 0;
572}
573#endif /* IEEE1284 support */
574
575/* Handle an interrupt. */
576void parport_ieee1284_interrupt (int which, void *handle, struct pt_regs *regs)
577{
578 struct parport *port = handle;
579 parport_ieee1284_wakeup (port);
580
581#ifdef CONFIG_PARPORT_1284
582 if (port->ieee1284.phase == IEEE1284_PH_REV_IDLE) {
583 /* An interrupt in this phase means that data
584 * is now available. */
585 DPRINTK (KERN_DEBUG "%s: Data available\n", port->name);
586 parport_ieee1284_ack_data_avail (port);
587 }
588#endif /* IEEE1284 support */
589}
590
591/**
592 * parport_write - write a block of data to a parallel port
593 * @port: port to write to
594 * @buffer: data buffer (in kernel space)
595 * @len: number of bytes of data to transfer
596 *
597 * This will write up to @len bytes of @buffer to the port
598 * specified, using the IEEE 1284 transfer mode most recently
599 * negotiated to (using parport_negotiate()), as long as that
600 * mode supports forward transfers (host to peripheral).
601 *
602 * It is the caller's responsibility to ensure that the first
603 * @len bytes of @buffer are valid.
604 *
605 * This function returns the number of bytes transferred (if zero
606 * or positive), or else an error code.
607 */
608
609ssize_t parport_write (struct parport *port, const void *buffer, size_t len)
610{
611#ifndef CONFIG_PARPORT_1284
612 return port->ops->compat_write_data (port, buffer, len, 0);
613#else
614 ssize_t retval;
615 int mode = port->ieee1284.mode;
616 int addr = mode & IEEE1284_ADDR;
617 size_t (*fn) (struct parport *, const void *, size_t, int);
618
619 /* Ignore the device-ID-request bit and the address bit. */
620 mode &= ~(IEEE1284_DEVICEID | IEEE1284_ADDR);
621
622 /* Use the mode we're in. */
623 switch (mode) {
624 case IEEE1284_MODE_NIBBLE:
625 case IEEE1284_MODE_BYTE:
626 parport_negotiate (port, IEEE1284_MODE_COMPAT);
627 case IEEE1284_MODE_COMPAT:
628 DPRINTK (KERN_DEBUG "%s: Using compatibility mode\n",
629 port->name);
630 fn = port->ops->compat_write_data;
631 break;
632
633 case IEEE1284_MODE_EPP:
634 DPRINTK (KERN_DEBUG "%s: Using EPP mode\n", port->name);
635 if (addr) {
636 fn = port->ops->epp_write_addr;
637 } else {
638 fn = port->ops->epp_write_data;
639 }
640 break;
641 case IEEE1284_MODE_EPPSWE:
642 DPRINTK (KERN_DEBUG "%s: Using software-emulated EPP mode\n",
643 port->name);
644 if (addr) {
645 fn = parport_ieee1284_epp_write_addr;
646 } else {
647 fn = parport_ieee1284_epp_write_data;
648 }
649 break;
650 case IEEE1284_MODE_ECP:
651 case IEEE1284_MODE_ECPRLE:
652 DPRINTK (KERN_DEBUG "%s: Using ECP mode\n", port->name);
653 if (addr) {
654 fn = port->ops->ecp_write_addr;
655 } else {
656 fn = port->ops->ecp_write_data;
657 }
658 break;
659
660 case IEEE1284_MODE_ECPSWE:
661 DPRINTK (KERN_DEBUG "%s: Using software-emulated ECP mode\n",
662 port->name);
663 /* The caller has specified that it must be emulated,
664 * even if we have ECP hardware! */
665 if (addr) {
666 fn = parport_ieee1284_ecp_write_addr;
667 } else {
668 fn = parport_ieee1284_ecp_write_data;
669 }
670 break;
671
672 default:
673 DPRINTK (KERN_DEBUG "%s: Unknown mode 0x%02x\n", port->name,
674 port->ieee1284.mode);
675 return -ENOSYS;
676 }
677
678 retval = (*fn) (port, buffer, len, 0);
679 DPRINTK (KERN_DEBUG "%s: wrote %d/%d bytes\n", port->name, retval, len);
680 return retval;
681#endif /* IEEE1284 support */
682}
683
684/**
685 * parport_read - read a block of data from a parallel port
686 * @port: port to read from
687 * @buffer: data buffer (in kernel space)
688 * @len: number of bytes of data to transfer
689 *
690 * This will read up to @len bytes of @buffer to the port
691 * specified, using the IEEE 1284 transfer mode most recently
692 * negotiated to (using parport_negotiate()), as long as that
693 * mode supports reverse transfers (peripheral to host).
694 *
695 * It is the caller's responsibility to ensure that the first
696 * @len bytes of @buffer are available to write to.
697 *
698 * This function returns the number of bytes transferred (if zero
699 * or positive), or else an error code.
700 */
701
702ssize_t parport_read (struct parport *port, void *buffer, size_t len)
703{
704#ifndef CONFIG_PARPORT_1284
705 printk (KERN_ERR "parport: IEEE1284 not supported in this kernel\n");
706 return -ENODEV;
707#else
708 int mode = port->physport->ieee1284.mode;
709 int addr = mode & IEEE1284_ADDR;
710 size_t (*fn) (struct parport *, void *, size_t, int);
711
712 /* Ignore the device-ID-request bit and the address bit. */
713 mode &= ~(IEEE1284_DEVICEID | IEEE1284_ADDR);
714
715 /* Use the mode we're in. */
716 switch (mode) {
717 case IEEE1284_MODE_COMPAT:
718 /* if we can tri-state use BYTE mode instead of NIBBLE mode,
719 * if that fails, revert to NIBBLE mode -- ought to store somewhere
720 * the device's ability to do BYTE mode reverse transfers, so we don't
721 * end up needlessly calling negotiate(BYTE) repeately.. (fb)
722 */
723 if ((port->physport->modes & PARPORT_MODE_TRISTATE) &&
724 !parport_negotiate (port, IEEE1284_MODE_BYTE)) {
725 /* got into BYTE mode OK */
726 DPRINTK (KERN_DEBUG "%s: Using byte mode\n", port->name);
727 fn = port->ops->byte_read_data;
728 break;
729 }
730 if (parport_negotiate (port, IEEE1284_MODE_NIBBLE)) {
731 return -EIO;
732 }
733 /* fall through to NIBBLE */
734 case IEEE1284_MODE_NIBBLE:
735 DPRINTK (KERN_DEBUG "%s: Using nibble mode\n", port->name);
736 fn = port->ops->nibble_read_data;
737 break;
738
739 case IEEE1284_MODE_BYTE:
740 DPRINTK (KERN_DEBUG "%s: Using byte mode\n", port->name);
741 fn = port->ops->byte_read_data;
742 break;
743
744 case IEEE1284_MODE_EPP:
745 DPRINTK (KERN_DEBUG "%s: Using EPP mode\n", port->name);
746 if (addr) {
747 fn = port->ops->epp_read_addr;
748 } else {
749 fn = port->ops->epp_read_data;
750 }
751 break;
752 case IEEE1284_MODE_EPPSWE:
753 DPRINTK (KERN_DEBUG "%s: Using software-emulated EPP mode\n",
754 port->name);
755 if (addr) {
756 fn = parport_ieee1284_epp_read_addr;
757 } else {
758 fn = parport_ieee1284_epp_read_data;
759 }
760 break;
761 case IEEE1284_MODE_ECP:
762 case IEEE1284_MODE_ECPRLE:
763 DPRINTK (KERN_DEBUG "%s: Using ECP mode\n", port->name);
764 fn = port->ops->ecp_read_data;
765 break;
766
767 case IEEE1284_MODE_ECPSWE:
768 DPRINTK (KERN_DEBUG "%s: Using software-emulated ECP mode\n",
769 port->name);
770 fn = parport_ieee1284_ecp_read_data;
771 break;
772
773 default:
774 DPRINTK (KERN_DEBUG "%s: Unknown mode 0x%02x\n", port->name,
775 port->physport->ieee1284.mode);
776 return -ENOSYS;
777 }
778
779 return (*fn) (port, buffer, len, 0);
780#endif /* IEEE1284 support */
781}
782
783/**
784 * parport_set_timeout - set the inactivity timeout for a device
785 * @dev: device on a port
786 * @inactivity: inactivity timeout (in jiffies)
787 *
788 * This sets the inactivity timeout for a particular device on a
789 * port. This affects functions like parport_wait_peripheral().
790 * The special value 0 means not to call schedule() while dealing
791 * with this device.
792 *
793 * The return value is the previous inactivity timeout.
794 *
795 * Any callers of parport_wait_event() for this device are woken
796 * up.
797 */
798
799long parport_set_timeout (struct pardevice *dev, long inactivity)
800{
801 long int old = dev->timeout;
802
803 dev->timeout = inactivity;
804
805 if (dev->port->physport->cad == dev)
806 parport_ieee1284_wakeup (dev->port);
807
808 return old;
809}
810
811/* Exported symbols for modules. */
812
813EXPORT_SYMBOL(parport_negotiate);
814EXPORT_SYMBOL(parport_write);
815EXPORT_SYMBOL(parport_read);
816EXPORT_SYMBOL(parport_wait_peripheral);
817EXPORT_SYMBOL(parport_wait_event);
818EXPORT_SYMBOL(parport_set_timeout);
819EXPORT_SYMBOL(parport_ieee1284_interrupt);
diff --git a/drivers/parport/ieee1284_ops.c b/drivers/parport/ieee1284_ops.c
new file mode 100644
index 000000000000..6624278c6ed8
--- /dev/null
+++ b/drivers/parport/ieee1284_ops.c
@@ -0,0 +1,921 @@
1/* IEEE-1284 operations for parport.
2 *
3 * This file is for generic IEEE 1284 operations. The idea is that
4 * they are used by the low-level drivers. If they have a special way
5 * of doing something, they can provide their own routines (and put
6 * the function pointers in port->ops); if not, they can just use these
7 * as a fallback.
8 *
9 * Note: Make no assumptions about hardware or architecture in this file!
10 *
11 * Author: Tim Waugh <tim@cyberelk.demon.co.uk>
12 * Fixed AUTOFD polarity in ecp_forward_to_reverse(). Fred Barnes, 1999
13 * Software emulated EPP fixes, Fred Barnes, 04/2001.
14 */
15
16
17#include <linux/config.h>
18#include <linux/module.h>
19#include <linux/parport.h>
20#include <linux/delay.h>
21#include <linux/sched.h>
22#include <asm/uaccess.h>
23
24#undef DEBUG /* undef me for production */
25
26#ifdef CONFIG_LP_CONSOLE
27#undef DEBUG /* Don't want a garbled console */
28#endif
29
30#ifdef DEBUG
31#define DPRINTK(stuff...) printk (stuff)
32#else
33#define DPRINTK(stuff...)
34#endif
35
36/*** *
37 * One-way data transfer functions. *
38 * ***/
39
40/* Compatibility mode. */
41size_t parport_ieee1284_write_compat (struct parport *port,
42 const void *buffer, size_t len,
43 int flags)
44{
45 int no_irq = 1;
46 ssize_t count = 0;
47 const unsigned char *addr = buffer;
48 unsigned char byte;
49 struct pardevice *dev = port->physport->cad;
50 unsigned char ctl = (PARPORT_CONTROL_SELECT
51 | PARPORT_CONTROL_INIT);
52
53 if (port->irq != PARPORT_IRQ_NONE) {
54 parport_enable_irq (port);
55 no_irq = 0;
56 }
57
58 port->physport->ieee1284.phase = IEEE1284_PH_FWD_DATA;
59 parport_write_control (port, ctl);
60 parport_data_forward (port);
61 while (count < len) {
62 unsigned long expire = jiffies + dev->timeout;
63 long wait = (HZ + 99) / 100;
64 unsigned char mask = (PARPORT_STATUS_ERROR
65 | PARPORT_STATUS_BUSY);
66 unsigned char val = (PARPORT_STATUS_ERROR
67 | PARPORT_STATUS_BUSY);
68
69 /* Wait until the peripheral's ready */
70 do {
71 /* Is the peripheral ready yet? */
72 if (!parport_wait_peripheral (port, mask, val))
73 /* Skip the loop */
74 goto ready;
75
76 /* Is the peripheral upset? */
77 if ((parport_read_status (port) &
78 (PARPORT_STATUS_PAPEROUT |
79 PARPORT_STATUS_SELECT |
80 PARPORT_STATUS_ERROR))
81 != (PARPORT_STATUS_SELECT |
82 PARPORT_STATUS_ERROR))
83 /* If nFault is asserted (i.e. no
84 * error) and PAPEROUT and SELECT are
85 * just red herrings, give the driver
86 * a chance to check it's happy with
87 * that before continuing. */
88 goto stop;
89
90 /* Have we run out of time? */
91 if (!time_before (jiffies, expire))
92 break;
93
94 /* Yield the port for a while. If this is the
95 first time around the loop, don't let go of
96 the port. This way, we find out if we have
97 our interrupt handler called. */
98 if (count && no_irq) {
99 parport_release (dev);
100 __set_current_state (TASK_INTERRUPTIBLE);
101 schedule_timeout (wait);
102 parport_claim_or_block (dev);
103 }
104 else
105 /* We must have the device claimed here */
106 parport_wait_event (port, wait);
107
108 /* Is there a signal pending? */
109 if (signal_pending (current))
110 break;
111
112 /* Wait longer next time. */
113 wait *= 2;
114 } while (time_before (jiffies, expire));
115
116 if (signal_pending (current))
117 break;
118
119 DPRINTK (KERN_DEBUG "%s: Timed out\n", port->name);
120 break;
121
122 ready:
123 /* Write the character to the data lines. */
124 byte = *addr++;
125 parport_write_data (port, byte);
126 udelay (1);
127
128 /* Pulse strobe. */
129 parport_write_control (port, ctl | PARPORT_CONTROL_STROBE);
130 udelay (1); /* strobe */
131
132 parport_write_control (port, ctl);
133 udelay (1); /* hold */
134
135 /* Assume the peripheral received it. */
136 count++;
137
138 /* Let another process run if it needs to. */
139 if (time_before (jiffies, expire))
140 if (!parport_yield_blocking (dev)
141 && need_resched())
142 schedule ();
143 }
144 stop:
145 port->physport->ieee1284.phase = IEEE1284_PH_FWD_IDLE;
146
147 return count;
148}
149
150/* Nibble mode. */
151size_t parport_ieee1284_read_nibble (struct parport *port,
152 void *buffer, size_t len,
153 int flags)
154{
155#ifndef CONFIG_PARPORT_1284
156 return 0;
157#else
158 unsigned char *buf = buffer;
159 int i;
160 unsigned char byte = 0;
161
162 len *= 2; /* in nibbles */
163 for (i=0; i < len; i++) {
164 unsigned char nibble;
165
166 /* Does the error line indicate end of data? */
167 if (((i & 1) == 0) &&
168 (parport_read_status(port) & PARPORT_STATUS_ERROR)) {
169 port->physport->ieee1284.phase = IEEE1284_PH_HBUSY_DNA;
170 DPRINTK (KERN_DEBUG
171 "%s: No more nibble data (%d bytes)\n",
172 port->name, i/2);
173
174 /* Go to reverse idle phase. */
175 parport_frob_control (port,
176 PARPORT_CONTROL_AUTOFD,
177 PARPORT_CONTROL_AUTOFD);
178 port->physport->ieee1284.phase = IEEE1284_PH_REV_IDLE;
179 break;
180 }
181
182 /* Event 7: Set nAutoFd low. */
183 parport_frob_control (port,
184 PARPORT_CONTROL_AUTOFD,
185 PARPORT_CONTROL_AUTOFD);
186
187 /* Event 9: nAck goes low. */
188 port->ieee1284.phase = IEEE1284_PH_REV_DATA;
189 if (parport_wait_peripheral (port,
190 PARPORT_STATUS_ACK, 0)) {
191 /* Timeout -- no more data? */
192 DPRINTK (KERN_DEBUG
193 "%s: Nibble timeout at event 9 (%d bytes)\n",
194 port->name, i/2);
195 parport_frob_control (port, PARPORT_CONTROL_AUTOFD, 0);
196 break;
197 }
198
199
200 /* Read a nibble. */
201 nibble = parport_read_status (port) >> 3;
202 nibble &= ~8;
203 if ((nibble & 0x10) == 0)
204 nibble |= 8;
205 nibble &= 0xf;
206
207 /* Event 10: Set nAutoFd high. */
208 parport_frob_control (port, PARPORT_CONTROL_AUTOFD, 0);
209
210 /* Event 11: nAck goes high. */
211 if (parport_wait_peripheral (port,
212 PARPORT_STATUS_ACK,
213 PARPORT_STATUS_ACK)) {
214 /* Timeout -- no more data? */
215 DPRINTK (KERN_DEBUG
216 "%s: Nibble timeout at event 11\n",
217 port->name);
218 break;
219 }
220
221 if (i & 1) {
222 /* Second nibble */
223 byte |= nibble << 4;
224 *buf++ = byte;
225 } else
226 byte = nibble;
227 }
228
229 i /= 2; /* i is now in bytes */
230
231 if (i == len) {
232 /* Read the last nibble without checking data avail. */
233 port = port->physport;
234 if (parport_read_status (port) & PARPORT_STATUS_ERROR)
235 port->ieee1284.phase = IEEE1284_PH_HBUSY_DNA;
236 else
237 port->ieee1284.phase = IEEE1284_PH_HBUSY_DAVAIL;
238 }
239
240 return i;
241#endif /* IEEE1284 support */
242}
243
244/* Byte mode. */
245size_t parport_ieee1284_read_byte (struct parport *port,
246 void *buffer, size_t len,
247 int flags)
248{
249#ifndef CONFIG_PARPORT_1284
250 return 0;
251#else
252 unsigned char *buf = buffer;
253 ssize_t count = 0;
254
255 for (count = 0; count < len; count++) {
256 unsigned char byte;
257
258 /* Data available? */
259 if (parport_read_status (port) & PARPORT_STATUS_ERROR) {
260 port->physport->ieee1284.phase = IEEE1284_PH_HBUSY_DNA;
261 DPRINTK (KERN_DEBUG
262 "%s: No more byte data (%Zd bytes)\n",
263 port->name, count);
264
265 /* Go to reverse idle phase. */
266 parport_frob_control (port,
267 PARPORT_CONTROL_AUTOFD,
268 PARPORT_CONTROL_AUTOFD);
269 port->physport->ieee1284.phase = IEEE1284_PH_REV_IDLE;
270 break;
271 }
272
273 /* Event 14: Place data bus in high impedance state. */
274 parport_data_reverse (port);
275
276 /* Event 7: Set nAutoFd low. */
277 parport_frob_control (port,
278 PARPORT_CONTROL_AUTOFD,
279 PARPORT_CONTROL_AUTOFD);
280
281 /* Event 9: nAck goes low. */
282 port->physport->ieee1284.phase = IEEE1284_PH_REV_DATA;
283 if (parport_wait_peripheral (port,
284 PARPORT_STATUS_ACK,
285 0)) {
286 /* Timeout -- no more data? */
287 parport_frob_control (port, PARPORT_CONTROL_AUTOFD,
288 0);
289 DPRINTK (KERN_DEBUG "%s: Byte timeout at event 9\n",
290 port->name);
291 break;
292 }
293
294 byte = parport_read_data (port);
295 *buf++ = byte;
296
297 /* Event 10: Set nAutoFd high */
298 parport_frob_control (port, PARPORT_CONTROL_AUTOFD, 0);
299
300 /* Event 11: nAck goes high. */
301 if (parport_wait_peripheral (port,
302 PARPORT_STATUS_ACK,
303 PARPORT_STATUS_ACK)) {
304 /* Timeout -- no more data? */
305 DPRINTK (KERN_DEBUG "%s: Byte timeout at event 11\n",
306 port->name);
307 break;
308 }
309
310 /* Event 16: Set nStrobe low. */
311 parport_frob_control (port,
312 PARPORT_CONTROL_STROBE,
313 PARPORT_CONTROL_STROBE);
314 udelay (5);
315
316 /* Event 17: Set nStrobe high. */
317 parport_frob_control (port, PARPORT_CONTROL_STROBE, 0);
318 }
319
320 if (count == len) {
321 /* Read the last byte without checking data avail. */
322 port = port->physport;
323 if (parport_read_status (port) & PARPORT_STATUS_ERROR)
324 port->ieee1284.phase = IEEE1284_PH_HBUSY_DNA;
325 else
326 port->ieee1284.phase = IEEE1284_PH_HBUSY_DAVAIL;
327 }
328
329 return count;
330#endif /* IEEE1284 support */
331}
332
333/*** *
334 * ECP Functions. *
335 * ***/
336
337#ifdef CONFIG_PARPORT_1284
338
339static inline
340int ecp_forward_to_reverse (struct parport *port)
341{
342 int retval;
343
344 /* Event 38: Set nAutoFd low */
345 parport_frob_control (port,
346 PARPORT_CONTROL_AUTOFD,
347 PARPORT_CONTROL_AUTOFD);
348 parport_data_reverse (port);
349 udelay (5);
350
351 /* Event 39: Set nInit low to initiate bus reversal */
352 parport_frob_control (port,
353 PARPORT_CONTROL_INIT,
354 0);
355
356 /* Event 40: PError goes low */
357 retval = parport_wait_peripheral (port,
358 PARPORT_STATUS_PAPEROUT, 0);
359
360 if (!retval) {
361 DPRINTK (KERN_DEBUG "%s: ECP direction: reverse\n",
362 port->name);
363 port->ieee1284.phase = IEEE1284_PH_REV_IDLE;
364 } else {
365 DPRINTK (KERN_DEBUG "%s: ECP direction: failed to reverse\n",
366 port->name);
367 port->ieee1284.phase = IEEE1284_PH_ECP_DIR_UNKNOWN;
368 }
369
370 return retval;
371}
372
373static inline
374int ecp_reverse_to_forward (struct parport *port)
375{
376 int retval;
377
378 /* Event 47: Set nInit high */
379 parport_frob_control (port,
380 PARPORT_CONTROL_INIT
381 | PARPORT_CONTROL_AUTOFD,
382 PARPORT_CONTROL_INIT
383 | PARPORT_CONTROL_AUTOFD);
384
385 /* Event 49: PError goes high */
386 retval = parport_wait_peripheral (port,
387 PARPORT_STATUS_PAPEROUT,
388 PARPORT_STATUS_PAPEROUT);
389
390 if (!retval) {
391 parport_data_forward (port);
392 DPRINTK (KERN_DEBUG "%s: ECP direction: forward\n",
393 port->name);
394 port->ieee1284.phase = IEEE1284_PH_FWD_IDLE;
395 } else {
396 DPRINTK (KERN_DEBUG
397 "%s: ECP direction: failed to switch forward\n",
398 port->name);
399 port->ieee1284.phase = IEEE1284_PH_ECP_DIR_UNKNOWN;
400 }
401
402
403 return retval;
404}
405
406#endif /* IEEE1284 support */
407
408/* ECP mode, forward channel, data. */
409size_t parport_ieee1284_ecp_write_data (struct parport *port,
410 const void *buffer, size_t len,
411 int flags)
412{
413#ifndef CONFIG_PARPORT_1284
414 return 0;
415#else
416 const unsigned char *buf = buffer;
417 size_t written;
418 int retry;
419
420 port = port->physport;
421
422 if (port->ieee1284.phase != IEEE1284_PH_FWD_IDLE)
423 if (ecp_reverse_to_forward (port))
424 return 0;
425
426 port->ieee1284.phase = IEEE1284_PH_FWD_DATA;
427
428 /* HostAck high (data, not command) */
429 parport_frob_control (port,
430 PARPORT_CONTROL_AUTOFD
431 | PARPORT_CONTROL_STROBE
432 | PARPORT_CONTROL_INIT,
433 PARPORT_CONTROL_INIT);
434 for (written = 0; written < len; written++, buf++) {
435 unsigned long expire = jiffies + port->cad->timeout;
436 unsigned char byte;
437
438 byte = *buf;
439 try_again:
440 parport_write_data (port, byte);
441 parport_frob_control (port, PARPORT_CONTROL_STROBE,
442 PARPORT_CONTROL_STROBE);
443 udelay (5);
444 for (retry = 0; retry < 100; retry++) {
445 if (!parport_wait_peripheral (port,
446 PARPORT_STATUS_BUSY, 0))
447 goto success;
448
449 if (signal_pending (current)) {
450 parport_frob_control (port,
451 PARPORT_CONTROL_STROBE,
452 0);
453 break;
454 }
455 }
456
457 /* Time for Host Transfer Recovery (page 41 of IEEE1284) */
458 DPRINTK (KERN_DEBUG "%s: ECP transfer stalled!\n", port->name);
459
460 parport_frob_control (port, PARPORT_CONTROL_INIT,
461 PARPORT_CONTROL_INIT);
462 udelay (50);
463 if (parport_read_status (port) & PARPORT_STATUS_PAPEROUT) {
464 /* It's buggered. */
465 parport_frob_control (port, PARPORT_CONTROL_INIT, 0);
466 break;
467 }
468
469 parport_frob_control (port, PARPORT_CONTROL_INIT, 0);
470 udelay (50);
471 if (!(parport_read_status (port) & PARPORT_STATUS_PAPEROUT))
472 break;
473
474 DPRINTK (KERN_DEBUG "%s: Host transfer recovered\n",
475 port->name);
476
477 if (time_after_eq (jiffies, expire)) break;
478 goto try_again;
479 success:
480 parport_frob_control (port, PARPORT_CONTROL_STROBE, 0);
481 udelay (5);
482 if (parport_wait_peripheral (port,
483 PARPORT_STATUS_BUSY,
484 PARPORT_STATUS_BUSY))
485 /* Peripheral hasn't accepted the data. */
486 break;
487 }
488
489 port->ieee1284.phase = IEEE1284_PH_FWD_IDLE;
490
491 return written;
492#endif /* IEEE1284 support */
493}
494
495/* ECP mode, reverse channel, data. */
496size_t parport_ieee1284_ecp_read_data (struct parport *port,
497 void *buffer, size_t len, int flags)
498{
499#ifndef CONFIG_PARPORT_1284
500 return 0;
501#else
502 struct pardevice *dev = port->cad;
503 unsigned char *buf = buffer;
504 int rle_count = 0; /* shut gcc up */
505 unsigned char ctl;
506 int rle = 0;
507 ssize_t count = 0;
508
509 port = port->physport;
510
511 if (port->ieee1284.phase != IEEE1284_PH_REV_IDLE)
512 if (ecp_forward_to_reverse (port))
513 return 0;
514
515 port->ieee1284.phase = IEEE1284_PH_REV_DATA;
516
517 /* Set HostAck low to start accepting data. */
518 ctl = parport_read_control (port);
519 ctl &= ~(PARPORT_CONTROL_STROBE | PARPORT_CONTROL_INIT |
520 PARPORT_CONTROL_AUTOFD);
521 parport_write_control (port,
522 ctl | PARPORT_CONTROL_AUTOFD);
523 while (count < len) {
524 unsigned long expire = jiffies + dev->timeout;
525 unsigned char byte;
526 int command;
527
528 /* Event 43: Peripheral sets nAck low. It can take as
529 long as it wants. */
530 while (parport_wait_peripheral (port, PARPORT_STATUS_ACK, 0)) {
531 /* The peripheral hasn't given us data in
532 35ms. If we have data to give back to the
533 caller, do it now. */
534 if (count)
535 goto out;
536
537 /* If we've used up all the time we were allowed,
538 give up altogether. */
539 if (!time_before (jiffies, expire))
540 goto out;
541
542 /* Yield the port for a while. */
543 if (count && dev->port->irq != PARPORT_IRQ_NONE) {
544 parport_release (dev);
545 __set_current_state (TASK_INTERRUPTIBLE);
546 schedule_timeout ((HZ + 24) / 25);
547 parport_claim_or_block (dev);
548 }
549 else
550 /* We must have the device claimed here. */
551 parport_wait_event (port, (HZ + 24) / 25);
552
553 /* Is there a signal pending? */
554 if (signal_pending (current))
555 goto out;
556 }
557
558 /* Is this a command? */
559 if (rle)
560 /* The last byte was a run-length count, so
561 this can't be as well. */
562 command = 0;
563 else
564 command = (parport_read_status (port) &
565 PARPORT_STATUS_BUSY) ? 1 : 0;
566
567 /* Read the data. */
568 byte = parport_read_data (port);
569
570 /* If this is a channel command, rather than an RLE
571 command or a normal data byte, don't accept it. */
572 if (command) {
573 if (byte & 0x80) {
574 DPRINTK (KERN_DEBUG "%s: stopping short at "
575 "channel command (%02x)\n",
576 port->name, byte);
577 goto out;
578 }
579 else if (port->ieee1284.mode != IEEE1284_MODE_ECPRLE)
580 DPRINTK (KERN_DEBUG "%s: device illegally "
581 "using RLE; accepting anyway\n",
582 port->name);
583
584 rle_count = byte + 1;
585
586 /* Are we allowed to read that many bytes? */
587 if (rle_count > (len - count)) {
588 DPRINTK (KERN_DEBUG "%s: leaving %d RLE bytes "
589 "for next time\n", port->name,
590 rle_count);
591 break;
592 }
593
594 rle = 1;
595 }
596
597 /* Event 44: Set HostAck high, acknowledging handshake. */
598 parport_write_control (port, ctl);
599
600 /* Event 45: The peripheral has 35ms to set nAck high. */
601 if (parport_wait_peripheral (port, PARPORT_STATUS_ACK,
602 PARPORT_STATUS_ACK)) {
603 /* It's gone wrong. Return what data we have
604 to the caller. */
605 DPRINTK (KERN_DEBUG "ECP read timed out at 45\n");
606
607 if (command)
608 printk (KERN_WARNING
609 "%s: command ignored (%02x)\n",
610 port->name, byte);
611
612 break;
613 }
614
615 /* Event 46: Set HostAck low and accept the data. */
616 parport_write_control (port,
617 ctl | PARPORT_CONTROL_AUTOFD);
618
619 /* If we just read a run-length count, fetch the data. */
620 if (command)
621 continue;
622
623 /* If this is the byte after a run-length count, decompress. */
624 if (rle) {
625 rle = 0;
626 memset (buf, byte, rle_count);
627 buf += rle_count;
628 count += rle_count;
629 DPRINTK (KERN_DEBUG "%s: decompressed to %d bytes\n",
630 port->name, rle_count);
631 } else {
632 /* Normal data byte. */
633 *buf = byte;
634 buf++, count++;
635 }
636 }
637
638 out:
639 port->ieee1284.phase = IEEE1284_PH_REV_IDLE;
640 return count;
641#endif /* IEEE1284 support */
642}
643
644/* ECP mode, forward channel, commands. */
645size_t parport_ieee1284_ecp_write_addr (struct parport *port,
646 const void *buffer, size_t len,
647 int flags)
648{
649#ifndef CONFIG_PARPORT_1284
650 return 0;
651#else
652 const unsigned char *buf = buffer;
653 size_t written;
654 int retry;
655
656 port = port->physport;
657
658 if (port->ieee1284.phase != IEEE1284_PH_FWD_IDLE)
659 if (ecp_reverse_to_forward (port))
660 return 0;
661
662 port->ieee1284.phase = IEEE1284_PH_FWD_DATA;
663
664 /* HostAck low (command, not data) */
665 parport_frob_control (port,
666 PARPORT_CONTROL_AUTOFD
667 | PARPORT_CONTROL_STROBE
668 | PARPORT_CONTROL_INIT,
669 PARPORT_CONTROL_AUTOFD
670 | PARPORT_CONTROL_INIT);
671 for (written = 0; written < len; written++, buf++) {
672 unsigned long expire = jiffies + port->cad->timeout;
673 unsigned char byte;
674
675 byte = *buf;
676 try_again:
677 parport_write_data (port, byte);
678 parport_frob_control (port, PARPORT_CONTROL_STROBE,
679 PARPORT_CONTROL_STROBE);
680 udelay (5);
681 for (retry = 0; retry < 100; retry++) {
682 if (!parport_wait_peripheral (port,
683 PARPORT_STATUS_BUSY, 0))
684 goto success;
685
686 if (signal_pending (current)) {
687 parport_frob_control (port,
688 PARPORT_CONTROL_STROBE,
689 0);
690 break;
691 }
692 }
693
694 /* Time for Host Transfer Recovery (page 41 of IEEE1284) */
695 DPRINTK (KERN_DEBUG "%s: ECP transfer stalled!\n", port->name);
696
697 parport_frob_control (port, PARPORT_CONTROL_INIT,
698 PARPORT_CONTROL_INIT);
699 udelay (50);
700 if (parport_read_status (port) & PARPORT_STATUS_PAPEROUT) {
701 /* It's buggered. */
702 parport_frob_control (port, PARPORT_CONTROL_INIT, 0);
703 break;
704 }
705
706 parport_frob_control (port, PARPORT_CONTROL_INIT, 0);
707 udelay (50);
708 if (!(parport_read_status (port) & PARPORT_STATUS_PAPEROUT))
709 break;
710
711 DPRINTK (KERN_DEBUG "%s: Host transfer recovered\n",
712 port->name);
713
714 if (time_after_eq (jiffies, expire)) break;
715 goto try_again;
716 success:
717 parport_frob_control (port, PARPORT_CONTROL_STROBE, 0);
718 udelay (5);
719 if (parport_wait_peripheral (port,
720 PARPORT_STATUS_BUSY,
721 PARPORT_STATUS_BUSY))
722 /* Peripheral hasn't accepted the data. */
723 break;
724 }
725
726 port->ieee1284.phase = IEEE1284_PH_FWD_IDLE;
727
728 return written;
729#endif /* IEEE1284 support */
730}
731
732/*** *
733 * EPP functions. *
734 * ***/
735
736/* EPP mode, forward channel, data. */
737size_t parport_ieee1284_epp_write_data (struct parport *port,
738 const void *buffer, size_t len,
739 int flags)
740{
741 unsigned char *bp = (unsigned char *) buffer;
742 size_t ret = 0;
743
744 /* set EPP idle state (just to make sure) with strobe low */
745 parport_frob_control (port,
746 PARPORT_CONTROL_STROBE |
747 PARPORT_CONTROL_AUTOFD |
748 PARPORT_CONTROL_SELECT |
749 PARPORT_CONTROL_INIT,
750 PARPORT_CONTROL_STROBE |
751 PARPORT_CONTROL_INIT);
752 port->ops->data_forward (port);
753 for (; len > 0; len--, bp++) {
754 /* Event 62: Write data and set autofd low */
755 parport_write_data (port, *bp);
756 parport_frob_control (port, PARPORT_CONTROL_AUTOFD,
757 PARPORT_CONTROL_AUTOFD);
758
759 /* Event 58: wait for busy (nWait) to go high */
760 if (parport_poll_peripheral (port, PARPORT_STATUS_BUSY, 0, 10))
761 break;
762
763 /* Event 63: set nAutoFd (nDStrb) high */
764 parport_frob_control (port, PARPORT_CONTROL_AUTOFD, 0);
765
766 /* Event 60: wait for busy (nWait) to go low */
767 if (parport_poll_peripheral (port, PARPORT_STATUS_BUSY,
768 PARPORT_STATUS_BUSY, 5))
769 break;
770
771 ret++;
772 }
773
774 /* Event 61: set strobe (nWrite) high */
775 parport_frob_control (port, PARPORT_CONTROL_STROBE, 0);
776
777 return ret;
778}
779
780/* EPP mode, reverse channel, data. */
781size_t parport_ieee1284_epp_read_data (struct parport *port,
782 void *buffer, size_t len,
783 int flags)
784{
785 unsigned char *bp = (unsigned char *) buffer;
786 unsigned ret = 0;
787
788 /* set EPP idle state (just to make sure) with strobe high */
789 parport_frob_control (port,
790 PARPORT_CONTROL_STROBE |
791 PARPORT_CONTROL_AUTOFD |
792 PARPORT_CONTROL_SELECT |
793 PARPORT_CONTROL_INIT,
794 PARPORT_CONTROL_INIT);
795 port->ops->data_reverse (port);
796 for (; len > 0; len--, bp++) {
797 /* Event 67: set nAutoFd (nDStrb) low */
798 parport_frob_control (port,
799 PARPORT_CONTROL_AUTOFD,
800 PARPORT_CONTROL_AUTOFD);
801 /* Event 58: wait for Busy to go high */
802 if (parport_wait_peripheral (port, PARPORT_STATUS_BUSY, 0)) {
803 break;
804 }
805
806 *bp = parport_read_data (port);
807
808 /* Event 63: set nAutoFd (nDStrb) high */
809 parport_frob_control (port, PARPORT_CONTROL_AUTOFD, 0);
810
811 /* Event 60: wait for Busy to go low */
812 if (parport_poll_peripheral (port, PARPORT_STATUS_BUSY,
813 PARPORT_STATUS_BUSY, 5)) {
814 break;
815 }
816
817 ret++;
818 }
819 port->ops->data_forward (port);
820
821 return ret;
822}
823
824/* EPP mode, forward channel, addresses. */
825size_t parport_ieee1284_epp_write_addr (struct parport *port,
826 const void *buffer, size_t len,
827 int flags)
828{
829 unsigned char *bp = (unsigned char *) buffer;
830 size_t ret = 0;
831
832 /* set EPP idle state (just to make sure) with strobe low */
833 parport_frob_control (port,
834 PARPORT_CONTROL_STROBE |
835 PARPORT_CONTROL_AUTOFD |
836 PARPORT_CONTROL_SELECT |
837 PARPORT_CONTROL_INIT,
838 PARPORT_CONTROL_STROBE |
839 PARPORT_CONTROL_INIT);
840 port->ops->data_forward (port);
841 for (; len > 0; len--, bp++) {
842 /* Event 56: Write data and set nAStrb low. */
843 parport_write_data (port, *bp);
844 parport_frob_control (port, PARPORT_CONTROL_SELECT,
845 PARPORT_CONTROL_SELECT);
846
847 /* Event 58: wait for busy (nWait) to go high */
848 if (parport_poll_peripheral (port, PARPORT_STATUS_BUSY, 0, 10))
849 break;
850
851 /* Event 59: set nAStrb high */
852 parport_frob_control (port, PARPORT_CONTROL_SELECT, 0);
853
854 /* Event 60: wait for busy (nWait) to go low */
855 if (parport_poll_peripheral (port, PARPORT_STATUS_BUSY,
856 PARPORT_STATUS_BUSY, 5))
857 break;
858
859 ret++;
860 }
861
862 /* Event 61: set strobe (nWrite) high */
863 parport_frob_control (port, PARPORT_CONTROL_STROBE, 0);
864
865 return ret;
866}
867
868/* EPP mode, reverse channel, addresses. */
869size_t parport_ieee1284_epp_read_addr (struct parport *port,
870 void *buffer, size_t len,
871 int flags)
872{
873 unsigned char *bp = (unsigned char *) buffer;
874 unsigned ret = 0;
875
876 /* Set EPP idle state (just to make sure) with strobe high */
877 parport_frob_control (port,
878 PARPORT_CONTROL_STROBE |
879 PARPORT_CONTROL_AUTOFD |
880 PARPORT_CONTROL_SELECT |
881 PARPORT_CONTROL_INIT,
882 PARPORT_CONTROL_INIT);
883 port->ops->data_reverse (port);
884 for (; len > 0; len--, bp++) {
885 /* Event 64: set nSelectIn (nAStrb) low */
886 parport_frob_control (port, PARPORT_CONTROL_SELECT,
887 PARPORT_CONTROL_SELECT);
888
889 /* Event 58: wait for Busy to go high */
890 if (parport_wait_peripheral (port, PARPORT_STATUS_BUSY, 0)) {
891 break;
892 }
893
894 *bp = parport_read_data (port);
895
896 /* Event 59: set nSelectIn (nAStrb) high */
897 parport_frob_control (port, PARPORT_CONTROL_SELECT,
898 PARPORT_CONTROL_SELECT);
899
900 /* Event 60: wait for Busy to go low */
901 if (parport_poll_peripheral (port, PARPORT_STATUS_BUSY,
902 PARPORT_STATUS_BUSY, 5))
903 break;
904
905 ret++;
906 }
907 port->ops->data_forward (port);
908
909 return ret;
910}
911
912EXPORT_SYMBOL(parport_ieee1284_ecp_write_data);
913EXPORT_SYMBOL(parport_ieee1284_ecp_read_data);
914EXPORT_SYMBOL(parport_ieee1284_ecp_write_addr);
915EXPORT_SYMBOL(parport_ieee1284_write_compat);
916EXPORT_SYMBOL(parport_ieee1284_read_nibble);
917EXPORT_SYMBOL(parport_ieee1284_read_byte);
918EXPORT_SYMBOL(parport_ieee1284_epp_write_data);
919EXPORT_SYMBOL(parport_ieee1284_epp_read_data);
920EXPORT_SYMBOL(parport_ieee1284_epp_write_addr);
921EXPORT_SYMBOL(parport_ieee1284_epp_read_addr);
diff --git a/drivers/parport/multiface.h b/drivers/parport/multiface.h
new file mode 100644
index 000000000000..56769dd5d315
--- /dev/null
+++ b/drivers/parport/multiface.h
@@ -0,0 +1,20 @@
1#ifndef _MULTIFACE_H_
2#define _MULTIFACE_H_
3
4/*
5 * Defines for SerialMaster, Multiface Card II and Multiface Card III
6 * The addresses given below are offsets to the board base address
7 *
8 * 6.11.95 Joerg Dorchain (dorchain@mpi-sb.mpg.de)
9 *
10 */
11
12#define PIA_REG_PADWIDTH 255
13
14#define DUARTBASE 0x0000
15#define PITBASE 0x0100
16#define ROMBASE 0x0200
17#define PIABASE 0x4000
18
19#endif
20
diff --git a/drivers/parport/parport_amiga.c b/drivers/parport/parport_amiga.c
new file mode 100644
index 000000000000..5126e74ac2ec
--- /dev/null
+++ b/drivers/parport/parport_amiga.c
@@ -0,0 +1,293 @@
1/* Low-level parallel port routines for the Amiga built-in port
2 *
3 * Author: Joerg Dorchain <joerg@dorchain.net>
4 *
5 * This is a complete rewrite of the code, but based heaviy upon the old
6 * lp_intern. code.
7 *
8 * The built-in Amiga parallel port provides one port at a fixed address
9 * with 8 bidirectional data lines (D0 - D7) and 3 bidirectional status
10 * lines (BUSY, POUT, SEL), 1 output control line /STROBE (raised automatically
11 * in hardware when the data register is accessed), and 1 input control line
12 * /ACK, able to cause an interrupt, but both not directly settable by
13 * software.
14 */
15
16#include <linux/module.h>
17#include <linux/init.h>
18#include <linux/parport.h>
19#include <linux/ioport.h>
20#include <linux/interrupt.h>
21#include <asm/setup.h>
22#include <asm/amigahw.h>
23#include <asm/irq.h>
24#include <asm/io.h>
25#include <asm/amigaints.h>
26
27#undef DEBUG
28#ifdef DEBUG
29#define DPRINTK printk
30#else
31#define DPRINTK(x...) do { } while (0)
32#endif
33
34static struct parport *this_port = NULL;
35
36static void amiga_write_data(struct parport *p, unsigned char data)
37{
38 DPRINTK(KERN_DEBUG "write_data %c\n",data);
39 /* Triggers also /STROBE. This behavior cannot be changed */
40 ciaa.prb = data;
41 mb();
42}
43
44static unsigned char amiga_read_data(struct parport *p)
45{
46 /* Triggers also /STROBE. This behavior cannot be changed */
47 return ciaa.prb;
48}
49
50#if 0
51static unsigned char control_pc_to_amiga(unsigned char control)
52{
53 unsigned char ret = 0;
54
55 if (control & PARPORT_CONTROL_SELECT) /* XXX: What is SELECP? */
56 ;
57 if (control & PARPORT_CONTROL_INIT) /* INITP */
58 /* reset connected to cpu reset pin */;
59 if (control & PARPORT_CONTROL_AUTOFD) /* AUTOLF */
60 /* Not connected */;
61 if (control & PARPORT_CONTROL_STROBE) /* Strobe */
62 /* Handled only directly by hardware */;
63 return ret;
64}
65#endif
66
67static unsigned char control_amiga_to_pc(unsigned char control)
68{
69 return PARPORT_CONTROL_SELECT |
70 PARPORT_CONTROL_AUTOFD | PARPORT_CONTROL_STROBE;
71 /* fake value: interrupt enable, select in, no reset,
72 no autolf, no strobe - seems to be closest the wiring diagram */
73}
74
75static void amiga_write_control(struct parport *p, unsigned char control)
76{
77 DPRINTK(KERN_DEBUG "write_control %02x\n",control);
78 /* No implementation possible */
79}
80
81static unsigned char amiga_read_control( struct parport *p)
82{
83 DPRINTK(KERN_DEBUG "read_control \n");
84 return control_amiga_to_pc(0);
85}
86
87static unsigned char amiga_frob_control( struct parport *p, unsigned char mask, unsigned char val)
88{
89 unsigned char old;
90
91 DPRINTK(KERN_DEBUG "frob_control mask %02x, value %02x\n",mask,val);
92 old = amiga_read_control(p);
93 amiga_write_control(p, (old & ~mask) ^ val);
94 return old;
95}
96
97#if 0 /* currently unused */
98static unsigned char status_pc_to_amiga(unsigned char status)
99{
100 unsigned char ret = 1;
101
102 if (status & PARPORT_STATUS_BUSY) /* Busy */
103 ret &= ~1;
104 if (status & PARPORT_STATUS_ACK) /* Ack */
105 /* handled in hardware */;
106 if (status & PARPORT_STATUS_PAPEROUT) /* PaperOut */
107 ret |= 2;
108 if (status & PARPORT_STATUS_SELECT) /* select */
109 ret |= 4;
110 if (status & PARPORT_STATUS_ERROR) /* error */
111 /* not connected */;
112 return ret;
113}
114#endif
115
116static unsigned char status_amiga_to_pc(unsigned char status)
117{
118 unsigned char ret = PARPORT_STATUS_BUSY | PARPORT_STATUS_ACK | PARPORT_STATUS_ERROR;
119
120 if (status & 1) /* Busy */
121 ret &= ~PARPORT_STATUS_BUSY;
122 if (status & 2) /* PaperOut */
123 ret |= PARPORT_STATUS_PAPEROUT;
124 if (status & 4) /* Selected */
125 ret |= PARPORT_STATUS_SELECT;
126 /* the rest is not connected or handled autonomously in hardware */
127
128 return ret;
129}
130
131static unsigned char amiga_read_status(struct parport *p)
132{
133 unsigned char status;
134
135 status = status_amiga_to_pc(ciab.pra & 7);
136 DPRINTK(KERN_DEBUG "read_status %02x\n", status);
137 return status;
138}
139
140/* as this ports irq handling is already done, we use a generic funktion */
141static irqreturn_t amiga_interrupt(int irq, void *dev_id, struct pt_regs *regs)
142{
143 parport_generic_irq(irq, (struct parport *) dev_id, regs);
144 return IRQ_HANDLED;
145}
146
147static void amiga_enable_irq(struct parport *p)
148{
149 enable_irq(IRQ_AMIGA_CIAA_FLG);
150}
151
152static void amiga_disable_irq(struct parport *p)
153{
154 disable_irq(IRQ_AMIGA_CIAA_FLG);
155}
156
157static void amiga_data_forward(struct parport *p)
158{
159 DPRINTK(KERN_DEBUG "forward\n");
160 ciaa.ddrb = 0xff; /* all pins output */
161 mb();
162}
163
164static void amiga_data_reverse(struct parport *p)
165{
166 DPRINTK(KERN_DEBUG "reverse\n");
167 ciaa.ddrb = 0; /* all pins input */
168 mb();
169}
170
171static void amiga_init_state(struct pardevice *dev, struct parport_state *s)
172{
173 s->u.amiga.data = 0;
174 s->u.amiga.datadir = 255;
175 s->u.amiga.status = 0;
176 s->u.amiga.statusdir = 0;
177}
178
179static void amiga_save_state(struct parport *p, struct parport_state *s)
180{
181 mb();
182 s->u.amiga.data = ciaa.prb;
183 s->u.amiga.datadir = ciaa.ddrb;
184 s->u.amiga.status = ciab.pra & 7;
185 s->u.amiga.statusdir = ciab.ddra & 7;
186 mb();
187}
188
189static void amiga_restore_state(struct parport *p, struct parport_state *s)
190{
191 mb();
192 ciaa.prb = s->u.amiga.data;
193 ciaa.ddrb = s->u.amiga.datadir;
194 ciab.pra |= (ciab.pra & 0xf8) | s->u.amiga.status;
195 ciab.ddra |= (ciab.ddra & 0xf8) | s->u.amiga.statusdir;
196 mb();
197}
198
199static struct parport_operations pp_amiga_ops = {
200 .write_data = amiga_write_data,
201 .read_data = amiga_read_data,
202
203 .write_control = amiga_write_control,
204 .read_control = amiga_read_control,
205 .frob_control = amiga_frob_control,
206
207 .read_status = amiga_read_status,
208
209 .enable_irq = amiga_enable_irq,
210 .disable_irq = amiga_disable_irq,
211
212 .data_forward = amiga_data_forward,
213 .data_reverse = amiga_data_reverse,
214
215 .init_state = amiga_init_state,
216 .save_state = amiga_save_state,
217 .restore_state = amiga_restore_state,
218
219 .epp_write_data = parport_ieee1284_epp_write_data,
220 .epp_read_data = parport_ieee1284_epp_read_data,
221 .epp_write_addr = parport_ieee1284_epp_write_addr,
222 .epp_read_addr = parport_ieee1284_epp_read_addr,
223
224 .ecp_write_data = parport_ieee1284_ecp_write_data,
225 .ecp_read_data = parport_ieee1284_ecp_read_data,
226 .ecp_write_addr = parport_ieee1284_ecp_write_addr,
227
228 .compat_write_data = parport_ieee1284_write_compat,
229 .nibble_read_data = parport_ieee1284_read_nibble,
230 .byte_read_data = parport_ieee1284_read_byte,
231
232 .owner = THIS_MODULE,
233};
234
235/* ----------- Initialisation code --------------------------------- */
236
237static int __init parport_amiga_init(void)
238{
239 struct parport *p;
240 int err;
241
242 if (!MACH_IS_AMIGA || !AMIGAHW_PRESENT(AMI_PARALLEL))
243 return -ENODEV;
244
245 err = -EBUSY;
246 if (!request_mem_region(CIAA_PHYSADDR-1+0x100, 0x100, "parallel"))
247 goto out_mem;
248
249 ciaa.ddrb = 0xff;
250 ciab.ddra &= 0xf8;
251 mb();
252
253 p = parport_register_port((unsigned long)&ciaa.prb, IRQ_AMIGA_CIAA_FLG,
254 PARPORT_DMA_NONE, &pp_amiga_ops);
255 if (!p)
256 goto out_port;
257
258 err = request_irq(IRQ_AMIGA_CIAA_FLG, amiga_interrupt, 0, p->name, p);
259 if (err)
260 goto out_irq;
261
262 this_port = p;
263 printk(KERN_INFO "%s: Amiga built-in port using irq\n", p->name);
264 /* XXX: set operating mode */
265 parport_announce_port(p);
266
267 return 0;
268
269out_irq:
270 parport_put_port(p);
271out_port:
272 release_mem_region(CIAA_PHYSADDR-1+0x100, 0x100);
273out_mem:
274 return err;
275}
276
277static void __exit parport_amiga_exit(void)
278{
279 parport_remove_port(this_port);
280 if (this_port->irq != PARPORT_IRQ_NONE)
281 free_irq(IRQ_AMIGA_CIAA_FLG, this_port);
282 parport_put_port(this_port);
283 release_mem_region(CIAA_PHYSADDR-1+0x100, 0x100);
284}
285
286
287MODULE_AUTHOR("Joerg Dorchain <joerg@dorchain.net>");
288MODULE_DESCRIPTION("Parport Driver for Amiga builtin Port");
289MODULE_SUPPORTED_DEVICE("Amiga builtin Parallel Port");
290MODULE_LICENSE("GPL");
291
292module_init(parport_amiga_init)
293module_exit(parport_amiga_exit)
diff --git a/drivers/parport/parport_arc.c b/drivers/parport/parport_arc.c
new file mode 100644
index 000000000000..b35bb4f48d62
--- /dev/null
+++ b/drivers/parport/parport_arc.c
@@ -0,0 +1,139 @@
1/* Low-level parallel port routines for Archimedes onboard hardware
2 *
3 * Author: Phil Blundell <philb@gnu.org>
4 */
5
6/* This driver is for the parallel port hardware found on Acorn's old
7 * range of Archimedes machines. The A5000 and newer systems have PC-style
8 * I/O hardware and should use the parport_pc driver instead.
9 *
10 * The Acorn printer port hardware is very simple. There is a single 8-bit
11 * write-only latch for the data port and control/status bits are handled
12 * with various auxilliary input and output lines. The port is not
13 * bidirectional, does not support any modes other than SPP, and has only
14 * a subset of the standard printer control lines connected.
15 */
16
17#include <linux/threads.h>
18#include <linux/delay.h>
19#include <linux/errno.h>
20#include <linux/interrupt.h>
21#include <linux/ioport.h>
22#include <linux/kernel.h>
23#include <linux/slab.h>
24#include <linux/parport.h>
25
26#include <asm/ptrace.h>
27#include <asm/io.h>
28#include <asm/arch/oldlatches.h>
29#include <asm/arch/irqs.h>
30
31#define DATA_ADDRESS 0x3350010
32
33/* This is equivalent to the above and only used for request_region. */
34#define PORT_BASE 0x80000000 | ((DATA_ADDRESS - IO_BASE) >> 2)
35
36/* The hardware can't read from the data latch, so we must use a soft
37 copy. */
38static unsigned char data_copy;
39
40/* These are pretty simple. We know the irq is never shared and the
41 kernel does all the magic that's required. */
42static void arc_enable_irq(struct parport *p)
43{
44 enable_irq(p->irq);
45}
46
47static void arc_disable_irq(struct parport *p)
48{
49 disable_irq(p->irq);
50}
51
52static void arc_interrupt(int irq, void *dev_id, struct pt_regs *regs)
53{
54 parport_generic_irq(irq, (struct parport *) dev_id, regs);
55}
56
57static void arc_write_data(struct parport *p, unsigned char data)
58{
59 data_copy = data;
60 outb_t(data, DATA_LATCH);
61}
62
63static unsigned char arc_read_data(struct parport *p)
64{
65 return data_copy;
66}
67
68static struct parport_operations parport_arc_ops =
69{
70 .write_data = arc_write_data,
71 .read_data = arc_read_data,
72
73 .write_control = arc_write_control,
74 .read_control = arc_read_control,
75 .frob_control = arc_frob_control,
76
77 .read_status = arc_read_status,
78
79 .enable_irq = arc_enable_irq,
80 .disable_irq = arc_disable_irq,
81
82 .data_forward = arc_data_forward,
83 .data_reverse = arc_data_reverse,
84
85 .init_state = arc_init_state,
86 .save_state = arc_save_state,
87 .restore_state = arc_restore_state,
88
89 .epp_write_data = parport_ieee1284_epp_write_data,
90 .epp_read_data = parport_ieee1284_epp_read_data,
91 .epp_write_addr = parport_ieee1284_epp_write_addr,
92 .epp_read_addr = parport_ieee1284_epp_read_addr,
93
94 .ecp_write_data = parport_ieee1284_ecp_write_data,
95 .ecp_read_data = parport_ieee1284_ecp_read_data,
96 .ecp_write_addr = parport_ieee1284_ecp_write_addr,
97
98 .compat_write_data = parport_ieee1284_write_compat,
99 .nibble_read_data = parport_ieee1284_read_nibble,
100 .byte_read_data = parport_ieee1284_read_byte,
101
102 .owner = THIS_MODULE,
103};
104
105/* --- Initialisation code -------------------------------- */
106
107static int parport_arc_init(void)
108{
109 /* Archimedes hardware provides only one port, at a fixed address */
110 struct parport *p;
111 struct resource res;
112 char *fake_name = "parport probe");
113
114 res = request_region(PORT_BASE, 1, fake_name);
115 if (res == NULL)
116 return 0;
117
118 p = parport_register_port (PORT_BASE, IRQ_PRINTERACK,
119 PARPORT_DMA_NONE, &parport_arc_ops);
120
121 if (!p) {
122 release_region(PORT_BASE, 1);
123 return 0;
124 }
125
126 p->modes = PARPORT_MODE_ARCSPP;
127 p->size = 1;
128 rename_region(res, p->name);
129
130 printk(KERN_INFO "%s: Archimedes on-board port, using irq %d\n",
131 p->irq);
132
133 /* Tell the high-level drivers about the port. */
134 parport_announce_port (p);
135
136 return 1;
137}
138
139module_init(parport_arc_init)
diff --git a/drivers/parport/parport_atari.c b/drivers/parport/parport_atari.c
new file mode 100644
index 000000000000..78c3f34108bc
--- /dev/null
+++ b/drivers/parport/parport_atari.c
@@ -0,0 +1,240 @@
1/* Low-level parallel port routines for the Atari builtin port
2 *
3 * Author: Andreas Schwab <schwab@issan.informatik.uni-dortmund.de>
4 *
5 * Based on parport_amiga.c.
6 *
7 * The built-in Atari parallel port provides one port at a fixed address
8 * with 8 output data lines (D0 - D7), 1 output control line (STROBE)
9 * and 1 input status line (BUSY) able to cause an interrupt.
10 */
11
12#include <linux/module.h>
13#include <linux/init.h>
14#include <linux/parport.h>
15#include <linux/interrupt.h>
16#include <asm/setup.h>
17#include <asm/atarihw.h>
18#include <asm/irq.h>
19#include <asm/atariints.h>
20
21static struct parport *this_port = NULL;
22
23static unsigned char
24parport_atari_read_data(struct parport *p)
25{
26 unsigned long flags;
27 unsigned char data;
28
29 local_irq_save(flags);
30 sound_ym.rd_data_reg_sel = 15;
31 data = sound_ym.rd_data_reg_sel;
32 local_irq_restore(flags);
33 return data;
34}
35
36static void
37parport_atari_write_data(struct parport *p, unsigned char data)
38{
39 unsigned long flags;
40
41 local_irq_save(flags);
42 sound_ym.rd_data_reg_sel = 15;
43 sound_ym.wd_data = data;
44 local_irq_restore(flags);
45}
46
47static unsigned char
48parport_atari_read_control(struct parport *p)
49{
50 unsigned long flags;
51 unsigned char control = 0;
52
53 local_irq_save(flags);
54 sound_ym.rd_data_reg_sel = 14;
55 if (!(sound_ym.rd_data_reg_sel & (1 << 5)))
56 control = PARPORT_CONTROL_STROBE;
57 local_irq_restore(flags);
58 return control;
59}
60
61static void
62parport_atari_write_control(struct parport *p, unsigned char control)
63{
64 unsigned long flags;
65
66 local_irq_save(flags);
67 sound_ym.rd_data_reg_sel = 14;
68 if (control & PARPORT_CONTROL_STROBE)
69 sound_ym.wd_data = sound_ym.rd_data_reg_sel & ~(1 << 5);
70 else
71 sound_ym.wd_data = sound_ym.rd_data_reg_sel | (1 << 5);
72 local_irq_restore(flags);
73}
74
75static unsigned char
76parport_atari_frob_control(struct parport *p, unsigned char mask,
77 unsigned char val)
78{
79 unsigned char old = parport_atari_read_control(p);
80 parport_atari_write_control(p, (old & ~mask) ^ val);
81 return old;
82}
83
84static unsigned char
85parport_atari_read_status(struct parport *p)
86{
87 return ((mfp.par_dt_reg & 1 ? 0 : PARPORT_STATUS_BUSY) |
88 PARPORT_STATUS_SELECT | PARPORT_STATUS_ERROR);
89}
90
91static void
92parport_atari_init_state(struct pardevice *d, struct parport_state *s)
93{
94}
95
96static void
97parport_atari_save_state(struct parport *p, struct parport_state *s)
98{
99}
100
101static void
102parport_atari_restore_state(struct parport *p, struct parport_state *s)
103{
104}
105
106static irqreturn_t
107parport_atari_interrupt(int irq, void *dev_id, struct pt_regs *regs)
108{
109 parport_generic_irq(irq, (struct parport *) dev_id, regs);
110 return IRQ_HANDLED;
111}
112
113static void
114parport_atari_enable_irq(struct parport *p)
115{
116 enable_irq(IRQ_MFP_BUSY);
117}
118
119static void
120parport_atari_disable_irq(struct parport *p)
121{
122 disable_irq(IRQ_MFP_BUSY);
123}
124
125static void
126parport_atari_data_forward(struct parport *p)
127{
128 unsigned long flags;
129
130 local_irq_save(flags);
131 /* Soundchip port B as output. */
132 sound_ym.rd_data_reg_sel = 7;
133 sound_ym.wd_data = sound_ym.rd_data_reg_sel | 0x40;
134 local_irq_restore(flags);
135}
136
137static void
138parport_atari_data_reverse(struct parport *p)
139{
140#if 0 /* too dangerous, can kill sound chip */
141 unsigned long flags;
142
143 local_irq_save(flags);
144 /* Soundchip port B as input. */
145 sound_ym.rd_data_reg_sel = 7;
146 sound_ym.wd_data = sound_ym.rd_data_reg_sel & ~0x40;
147 local_irq_restore(flags);
148#endif
149}
150
151static struct parport_operations parport_atari_ops = {
152 .write_data = parport_atari_write_data,
153 .read_data = parport_atari_read_data,
154
155 .write_control = parport_atari_write_control,
156 .read_control = parport_atari_read_control,
157 .frob_control = parport_atari_frob_control,
158
159 .read_status = parport_atari_read_status,
160
161 .enable_irq = parport_atari_enable_irq,
162 .disable_irq = parport_atari_disable_irq,
163
164 .data_forward = parport_atari_data_forward,
165 .data_reverse = parport_atari_data_reverse,
166
167 .init_state = parport_atari_init_state,
168 .save_state = parport_atari_save_state,
169 .restore_state = parport_atari_restore_state,
170
171 .epp_write_data = parport_ieee1284_epp_write_data,
172 .epp_read_data = parport_ieee1284_epp_read_data,
173 .epp_write_addr = parport_ieee1284_epp_write_addr,
174 .epp_read_addr = parport_ieee1284_epp_read_addr,
175
176 .ecp_write_data = parport_ieee1284_ecp_write_data,
177 .ecp_read_data = parport_ieee1284_ecp_read_data,
178 .ecp_write_addr = parport_ieee1284_ecp_write_addr,
179
180 .compat_write_data = parport_ieee1284_write_compat,
181 .nibble_read_data = parport_ieee1284_read_nibble,
182 .byte_read_data = parport_ieee1284_read_byte,
183
184 .owner = THIS_MODULE,
185};
186
187
188static int __init parport_atari_init(void)
189{
190 struct parport *p;
191 unsigned long flags;
192
193 if (MACH_IS_ATARI) {
194 local_irq_save(flags);
195 /* Soundchip port A/B as output. */
196 sound_ym.rd_data_reg_sel = 7;
197 sound_ym.wd_data = (sound_ym.rd_data_reg_sel & 0x3f) | 0xc0;
198 /* STROBE high. */
199 sound_ym.rd_data_reg_sel = 14;
200 sound_ym.wd_data = sound_ym.rd_data_reg_sel | (1 << 5);
201 local_irq_restore(flags);
202 /* MFP port I0 as input. */
203 mfp.data_dir &= ~1;
204 /* MFP port I0 interrupt on high->low edge. */
205 mfp.active_edge &= ~1;
206 p = parport_register_port((unsigned long)&sound_ym.wd_data,
207 IRQ_MFP_BUSY, PARPORT_DMA_NONE,
208 &parport_atari_ops);
209 if (!p)
210 return -ENODEV;
211 if (request_irq(IRQ_MFP_BUSY, parport_atari_interrupt,
212 IRQ_TYPE_SLOW, p->name, p)) {
213 parport_put_port (p);
214 return -ENODEV;
215 }
216
217 this_port = p;
218 printk(KERN_INFO "%s: Atari built-in port using irq\n", p->name);
219 parport_announce_port (p);
220
221 return 0;
222 }
223 return -ENODEV;
224}
225
226static void __exit parport_atari_exit(void)
227{
228 parport_remove_port(this_port);
229 if (this_port->irq != PARPORT_IRQ_NONE)
230 free_irq(IRQ_MFP_BUSY, this_port);
231 parport_put_port(this_port);
232}
233
234MODULE_AUTHOR("Andreas Schwab");
235MODULE_DESCRIPTION("Parport Driver for Atari builtin Port");
236MODULE_SUPPORTED_DEVICE("Atari builtin Parallel Port");
237MODULE_LICENSE("GPL");
238
239module_init(parport_atari_init)
240module_exit(parport_atari_exit)
diff --git a/drivers/parport/parport_cs.c b/drivers/parport/parport_cs.c
new file mode 100644
index 000000000000..a3fa8185af2a
--- /dev/null
+++ b/drivers/parport/parport_cs.c
@@ -0,0 +1,397 @@
1/*======================================================================
2
3 A driver for PCMCIA parallel port adapters
4
5 (specifically, for the Quatech SPP-100 EPP card: other cards will
6 probably require driver tweaks)
7
8 parport_cs.c 1.29 2002/10/11 06:57:41
9
10 The contents of this file are subject to the Mozilla Public
11 License Version 1.1 (the "License"); you may not use this file
12 except in compliance with the License. You may obtain a copy of
13 the License at http://www.mozilla.org/MPL/
14
15 Software distributed under the License is distributed on an "AS
16 IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
17 implied. See the License for the specific language governing
18 rights and limitations under the License.
19
20 The initial developer of the original code is David A. Hinds
21 <dahinds@users.sourceforge.net>. Portions created by David A. Hinds
22 are Copyright (C) 1999 David A. Hinds. All Rights Reserved.
23
24 Alternatively, the contents of this file may be used under the
25 terms of the GNU General Public License version 2 (the "GPL"), in
26 which case the provisions of the GPL are applicable instead of the
27 above. If you wish to allow the use of your version of this file
28 only under the terms of the GPL and not to allow others to use
29 your version of this file under the MPL, indicate your decision
30 by deleting the provisions above and replace them with the notice
31 and other provisions required by the GPL. If you do not delete
32 the provisions above, a recipient may use your version of this
33 file under either the MPL or the GPL.
34
35======================================================================*/
36
37#include <linux/kernel.h>
38#include <linux/module.h>
39#include <linux/init.h>
40#include <linux/sched.h>
41#include <linux/ptrace.h>
42#include <linux/slab.h>
43#include <linux/string.h>
44#include <linux/timer.h>
45#include <linux/ioport.h>
46#include <linux/major.h>
47
48#include <linux/parport.h>
49#include <linux/parport_pc.h>
50
51#include <pcmcia/version.h>
52#include <pcmcia/cs_types.h>
53#include <pcmcia/cs.h>
54#include <pcmcia/cistpl.h>
55#include <pcmcia/ds.h>
56#include <pcmcia/cisreg.h>
57#include <pcmcia/ciscode.h>
58
59/*====================================================================*/
60
61/* Module parameters */
62
63MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>");
64MODULE_DESCRIPTION("PCMCIA parallel port card driver");
65MODULE_LICENSE("Dual MPL/GPL");
66
67#define INT_MODULE_PARM(n, v) static int n = v; module_param(n, int, 0)
68
69INT_MODULE_PARM(epp_mode, 1);
70
71#ifdef PCMCIA_DEBUG
72INT_MODULE_PARM(pc_debug, PCMCIA_DEBUG);
73#define DEBUG(n, args...) if (pc_debug>(n)) printk(KERN_DEBUG args)
74static char *version =
75"parport_cs.c 1.29 2002/10/11 06:57:41 (David Hinds)";
76#else
77#define DEBUG(n, args...)
78#endif
79
80/*====================================================================*/
81
82#define FORCE_EPP_MODE 0x08
83
84typedef struct parport_info_t {
85 dev_link_t link;
86 int ndev;
87 dev_node_t node;
88 struct parport *port;
89} parport_info_t;
90
91static dev_link_t *parport_attach(void);
92static void parport_detach(dev_link_t *);
93static void parport_config(dev_link_t *link);
94static void parport_cs_release(dev_link_t *);
95static int parport_event(event_t event, int priority,
96 event_callback_args_t *args);
97
98static dev_info_t dev_info = "parport_cs";
99static dev_link_t *dev_list = NULL;
100
101/*======================================================================
102
103 parport_attach() creates an "instance" of the driver, allocating
104 local data structures for one device. The device is registered
105 with Card Services.
106
107======================================================================*/
108
109static dev_link_t *parport_attach(void)
110{
111 parport_info_t *info;
112 dev_link_t *link;
113 client_reg_t client_reg;
114 int ret;
115
116 DEBUG(0, "parport_attach()\n");
117
118 /* Create new parport device */
119 info = kmalloc(sizeof(*info), GFP_KERNEL);
120 if (!info) return NULL;
121 memset(info, 0, sizeof(*info));
122 link = &info->link; link->priv = info;
123
124 link->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
125 link->io.Attributes2 = IO_DATA_PATH_WIDTH_8;
126 link->irq.Attributes = IRQ_TYPE_EXCLUSIVE;
127 link->irq.IRQInfo1 = IRQ_LEVEL_ID;
128 link->conf.Attributes = CONF_ENABLE_IRQ;
129 link->conf.Vcc = 50;
130 link->conf.IntType = INT_MEMORY_AND_IO;
131
132 /* Register with Card Services */
133 link->next = dev_list;
134 dev_list = link;
135 client_reg.dev_info = &dev_info;
136 client_reg.EventMask =
137 CS_EVENT_CARD_INSERTION | CS_EVENT_CARD_REMOVAL |
138 CS_EVENT_RESET_PHYSICAL | CS_EVENT_CARD_RESET |
139 CS_EVENT_PM_SUSPEND | CS_EVENT_PM_RESUME;
140 client_reg.event_handler = &parport_event;
141 client_reg.Version = 0x0210;
142 client_reg.event_callback_args.client_data = link;
143 ret = pcmcia_register_client(&link->handle, &client_reg);
144 if (ret != CS_SUCCESS) {
145 cs_error(link->handle, RegisterClient, ret);
146 parport_detach(link);
147 return NULL;
148 }
149
150 return link;
151} /* parport_attach */
152
153/*======================================================================
154
155 This deletes a driver "instance". The device is de-registered
156 with Card Services. If it has been released, all local data
157 structures are freed. Otherwise, the structures will be freed
158 when the device is released.
159
160======================================================================*/
161
162static void parport_detach(dev_link_t *link)
163{
164 dev_link_t **linkp;
165 int ret;
166
167 DEBUG(0, "parport_detach(0x%p)\n", link);
168
169 /* Locate device structure */
170 for (linkp = &dev_list; *linkp; linkp = &(*linkp)->next)
171 if (*linkp == link) break;
172 if (*linkp == NULL)
173 return;
174
175 if (link->state & DEV_CONFIG)
176 parport_cs_release(link);
177
178 if (link->handle) {
179 ret = pcmcia_deregister_client(link->handle);
180 if (ret != CS_SUCCESS)
181 cs_error(link->handle, DeregisterClient, ret);
182 }
183
184 /* Unlink, free device structure */
185 *linkp = link->next;
186 kfree(link->priv);
187
188} /* parport_detach */
189
190/*======================================================================
191
192 parport_config() is scheduled to run after a CARD_INSERTION event
193 is received, to configure the PCMCIA socket, and to make the
194 parport device available to the system.
195
196======================================================================*/
197
198#define CS_CHECK(fn, ret) \
199do { last_fn = (fn); if ((last_ret = (ret)) != 0) goto cs_failed; } while (0)
200
201void parport_config(dev_link_t *link)
202{
203 client_handle_t handle = link->handle;
204 parport_info_t *info = link->priv;
205 tuple_t tuple;
206 u_short buf[128];
207 cisparse_t parse;
208 config_info_t conf;
209 cistpl_cftable_entry_t *cfg = &parse.cftable_entry;
210 cistpl_cftable_entry_t dflt = { 0 };
211 struct parport *p;
212 int last_ret, last_fn;
213
214 DEBUG(0, "parport_config(0x%p)\n", link);
215
216 tuple.TupleData = (cisdata_t *)buf;
217 tuple.TupleOffset = 0; tuple.TupleDataMax = 255;
218 tuple.Attributes = 0;
219 tuple.DesiredTuple = CISTPL_CONFIG;
220 CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(handle, &tuple));
221 CS_CHECK(GetTupleData, pcmcia_get_tuple_data(handle, &tuple));
222 CS_CHECK(ParseTuple, pcmcia_parse_tuple(handle, &tuple, &parse));
223 link->conf.ConfigBase = parse.config.base;
224 link->conf.Present = parse.config.rmask[0];
225
226 /* Configure card */
227 link->state |= DEV_CONFIG;
228
229 /* Not sure if this is right... look up the current Vcc */
230 CS_CHECK(GetConfigurationInfo, pcmcia_get_configuration_info(handle, &conf));
231
232 tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
233 tuple.Attributes = 0;
234 CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(handle, &tuple));
235 while (1) {
236 if (pcmcia_get_tuple_data(handle, &tuple) != 0 ||
237 pcmcia_parse_tuple(handle, &tuple, &parse) != 0)
238 goto next_entry;
239
240 if ((cfg->io.nwin > 0) || (dflt.io.nwin > 0)) {
241 cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt.io;
242 link->conf.ConfigIndex = cfg->index;
243 if (epp_mode)
244 link->conf.ConfigIndex |= FORCE_EPP_MODE;
245 link->io.BasePort1 = io->win[0].base;
246 link->io.NumPorts1 = io->win[0].len;
247 link->io.IOAddrLines = io->flags & CISTPL_IO_LINES_MASK;
248 if (io->nwin == 2) {
249 link->io.BasePort2 = io->win[1].base;
250 link->io.NumPorts2 = io->win[1].len;
251 }
252 if (pcmcia_request_io(link->handle, &link->io) != 0)
253 goto next_entry;
254 /* If we've got this far, we're done */
255 break;
256 }
257
258 next_entry:
259 if (cfg->flags & CISTPL_CFTABLE_DEFAULT) dflt = *cfg;
260 CS_CHECK(GetNextTuple, pcmcia_get_next_tuple(handle, &tuple));
261 }
262
263 CS_CHECK(RequestIRQ, pcmcia_request_irq(handle, &link->irq));
264 CS_CHECK(RequestConfiguration, pcmcia_request_configuration(handle, &link->conf));
265
266 release_region(link->io.BasePort1, link->io.NumPorts1);
267 if (link->io.NumPorts2)
268 release_region(link->io.BasePort2, link->io.NumPorts2);
269 p = parport_pc_probe_port(link->io.BasePort1, link->io.BasePort2,
270 link->irq.AssignedIRQ, PARPORT_DMA_NONE,
271 NULL);
272 if (p == NULL) {
273 printk(KERN_NOTICE "parport_cs: parport_pc_probe_port() at "
274 "0x%3x, irq %u failed\n", link->io.BasePort1,
275 link->irq.AssignedIRQ);
276 goto failed;
277 }
278
279 p->modes |= PARPORT_MODE_PCSPP;
280 if (epp_mode)
281 p->modes |= PARPORT_MODE_TRISTATE | PARPORT_MODE_EPP;
282 info->ndev = 1;
283 info->node.major = LP_MAJOR;
284 info->node.minor = p->number;
285 info->port = p;
286 strcpy(info->node.dev_name, p->name);
287 link->dev = &info->node;
288
289 link->state &= ~DEV_CONFIG_PENDING;
290 return;
291
292cs_failed:
293 cs_error(link->handle, last_fn, last_ret);
294failed:
295 parport_cs_release(link);
296 link->state &= ~DEV_CONFIG_PENDING;
297
298} /* parport_config */
299
300/*======================================================================
301
302 After a card is removed, parport_cs_release() will unregister the
303 device, and release the PCMCIA configuration. If the device is
304 still open, this will be postponed until it is closed.
305
306======================================================================*/
307
308void parport_cs_release(dev_link_t *link)
309{
310 parport_info_t *info = link->priv;
311
312 DEBUG(0, "parport_release(0x%p)\n", link);
313
314 if (info->ndev) {
315 struct parport *p = info->port;
316 parport_pc_unregister_port(p);
317 request_region(link->io.BasePort1, link->io.NumPorts1,
318 info->node.dev_name);
319 if (link->io.NumPorts2)
320 request_region(link->io.BasePort2, link->io.NumPorts2,
321 info->node.dev_name);
322 }
323 info->ndev = 0;
324 link->dev = NULL;
325
326 pcmcia_release_configuration(link->handle);
327 pcmcia_release_io(link->handle, &link->io);
328 pcmcia_release_irq(link->handle, &link->irq);
329
330 link->state &= ~DEV_CONFIG;
331
332} /* parport_cs_release */
333
334/*======================================================================
335
336 The card status event handler. Mostly, this schedules other
337 stuff to run after an event is received.
338
339======================================================================*/
340
341int parport_event(event_t event, int priority,
342 event_callback_args_t *args)
343{
344 dev_link_t *link = args->client_data;
345
346 DEBUG(1, "parport_event(0x%06x)\n", event);
347
348 switch (event) {
349 case CS_EVENT_CARD_REMOVAL:
350 link->state &= ~DEV_PRESENT;
351 if (link->state & DEV_CONFIG)
352 parport_cs_release(link);
353 break;
354 case CS_EVENT_CARD_INSERTION:
355 link->state |= DEV_PRESENT | DEV_CONFIG_PENDING;
356 parport_config(link);
357 break;
358 case CS_EVENT_PM_SUSPEND:
359 link->state |= DEV_SUSPEND;
360 /* Fall through... */
361 case CS_EVENT_RESET_PHYSICAL:
362 if (link->state & DEV_CONFIG)
363 pcmcia_release_configuration(link->handle);
364 break;
365 case CS_EVENT_PM_RESUME:
366 link->state &= ~DEV_SUSPEND;
367 /* Fall through... */
368 case CS_EVENT_CARD_RESET:
369 if (DEV_OK(link))
370 pcmcia_request_configuration(link->handle, &link->conf);
371 break;
372 }
373 return 0;
374} /* parport_event */
375
376static struct pcmcia_driver parport_cs_driver = {
377 .owner = THIS_MODULE,
378 .drv = {
379 .name = "parport_cs",
380 },
381 .attach = parport_attach,
382 .detach = parport_detach,
383};
384
385static int __init init_parport_cs(void)
386{
387 return pcmcia_register_driver(&parport_cs_driver);
388}
389
390static void __exit exit_parport_cs(void)
391{
392 pcmcia_unregister_driver(&parport_cs_driver);
393 BUG_ON(dev_list != NULL);
394}
395
396module_init(init_parport_cs);
397module_exit(exit_parport_cs);
diff --git a/drivers/parport/parport_gsc.c b/drivers/parport/parport_gsc.c
new file mode 100644
index 000000000000..02d72acd1c89
--- /dev/null
+++ b/drivers/parport/parport_gsc.c
@@ -0,0 +1,437 @@
1/*
2 * Low-level parallel-support for PC-style hardware integrated in the
3 * LASI-Controller (on GSC-Bus) for HP-PARISC Workstations
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 *
10 * (C) 1999-2001 by Helge Deller <deller@gmx.de>
11 *
12 *
13 * based on parport_pc.c by
14 * Grant Guenther <grant@torque.net>
15 * Phil Blundell <philb@gnu.org>
16 * Tim Waugh <tim@cyberelk.demon.co.uk>
17 * Jose Renau <renau@acm.org>
18 * David Campbell <campbell@torque.net>
19 * Andrea Arcangeli
20 */
21
22#undef DEBUG /* undef for production */
23
24#include <linux/module.h>
25#include <linux/init.h>
26#include <linux/sched.h>
27#include <linux/delay.h>
28#include <linux/errno.h>
29#include <linux/interrupt.h>
30#include <linux/ioport.h>
31#include <linux/kernel.h>
32#include <linux/slab.h>
33#include <linux/pci.h>
34#include <linux/sysctl.h>
35
36#include <asm/io.h>
37#include <asm/dma.h>
38#include <asm/uaccess.h>
39#include <asm/superio.h>
40
41#include <linux/parport.h>
42#include <asm/pdc.h>
43#include <asm/parisc-device.h>
44#include <asm/hardware.h>
45#include "parport_gsc.h"
46
47
48MODULE_AUTHOR("Helge Deller <deller@gmx.de>");
49MODULE_DESCRIPTION("HP-PARISC PC-style parallel port driver");
50MODULE_SUPPORTED_DEVICE("integrated PC-style parallel port");
51MODULE_LICENSE("GPL");
52
53
54/*
55 * Clear TIMEOUT BIT in EPP MODE
56 *
57 * This is also used in SPP detection.
58 */
59static int clear_epp_timeout(struct parport *pb)
60{
61 unsigned char r;
62
63 if (!(parport_gsc_read_status(pb) & 0x01))
64 return 1;
65
66 /* To clear timeout some chips require double read */
67 parport_gsc_read_status(pb);
68 r = parport_gsc_read_status(pb);
69 parport_writeb (r | 0x01, STATUS (pb)); /* Some reset by writing 1 */
70 parport_writeb (r & 0xfe, STATUS (pb)); /* Others by writing 0 */
71 r = parport_gsc_read_status(pb);
72
73 return !(r & 0x01);
74}
75
76/*
77 * Access functions.
78 *
79 * Most of these aren't static because they may be used by the
80 * parport_xxx_yyy macros. extern __inline__ versions of several
81 * of these are in parport_gsc.h.
82 */
83
84static irqreturn_t parport_gsc_interrupt(int irq, void *dev_id, struct pt_regs *regs)
85{
86 parport_generic_irq(irq, (struct parport *) dev_id, regs);
87 return IRQ_HANDLED;
88}
89
90void parport_gsc_init_state(struct pardevice *dev, struct parport_state *s)
91{
92 s->u.pc.ctr = 0xc | (dev->irq_func ? 0x10 : 0x0);
93}
94
95void parport_gsc_save_state(struct parport *p, struct parport_state *s)
96{
97 s->u.pc.ctr = parport_readb (CONTROL (p));
98}
99
100void parport_gsc_restore_state(struct parport *p, struct parport_state *s)
101{
102 parport_writeb (s->u.pc.ctr, CONTROL (p));
103}
104
105struct parport_operations parport_gsc_ops =
106{
107 .write_data = parport_gsc_write_data,
108 .read_data = parport_gsc_read_data,
109
110 .write_control = parport_gsc_write_control,
111 .read_control = parport_gsc_read_control,
112 .frob_control = parport_gsc_frob_control,
113
114 .read_status = parport_gsc_read_status,
115
116 .enable_irq = parport_gsc_enable_irq,
117 .disable_irq = parport_gsc_disable_irq,
118
119 .data_forward = parport_gsc_data_forward,
120 .data_reverse = parport_gsc_data_reverse,
121
122 .init_state = parport_gsc_init_state,
123 .save_state = parport_gsc_save_state,
124 .restore_state = parport_gsc_restore_state,
125
126 .epp_write_data = parport_ieee1284_epp_write_data,
127 .epp_read_data = parport_ieee1284_epp_read_data,
128 .epp_write_addr = parport_ieee1284_epp_write_addr,
129 .epp_read_addr = parport_ieee1284_epp_read_addr,
130
131 .ecp_write_data = parport_ieee1284_ecp_write_data,
132 .ecp_read_data = parport_ieee1284_ecp_read_data,
133 .ecp_write_addr = parport_ieee1284_ecp_write_addr,
134
135 .compat_write_data = parport_ieee1284_write_compat,
136 .nibble_read_data = parport_ieee1284_read_nibble,
137 .byte_read_data = parport_ieee1284_read_byte,
138
139 .owner = THIS_MODULE,
140};
141
142/* --- Mode detection ------------------------------------- */
143
144/*
145 * Checks for port existence, all ports support SPP MODE
146 */
147static int __devinit parport_SPP_supported(struct parport *pb)
148{
149 unsigned char r, w;
150
151 /*
152 * first clear an eventually pending EPP timeout
153 * I (sailer@ife.ee.ethz.ch) have an SMSC chipset
154 * that does not even respond to SPP cycles if an EPP
155 * timeout is pending
156 */
157 clear_epp_timeout(pb);
158
159 /* Do a simple read-write test to make sure the port exists. */
160 w = 0xc;
161 parport_writeb (w, CONTROL (pb));
162
163 /* Is there a control register that we can read from? Some
164 * ports don't allow reads, so read_control just returns a
165 * software copy. Some ports _do_ allow reads, so bypass the
166 * software copy here. In addition, some bits aren't
167 * writable. */
168 r = parport_readb (CONTROL (pb));
169 if ((r & 0xf) == w) {
170 w = 0xe;
171 parport_writeb (w, CONTROL (pb));
172 r = parport_readb (CONTROL (pb));
173 parport_writeb (0xc, CONTROL (pb));
174 if ((r & 0xf) == w)
175 return PARPORT_MODE_PCSPP;
176 }
177
178 /* Try the data register. The data lines aren't tri-stated at
179 * this stage, so we expect back what we wrote. */
180 w = 0xaa;
181 parport_gsc_write_data (pb, w);
182 r = parport_gsc_read_data (pb);
183 if (r == w) {
184 w = 0x55;
185 parport_gsc_write_data (pb, w);
186 r = parport_gsc_read_data (pb);
187 if (r == w)
188 return PARPORT_MODE_PCSPP;
189 }
190
191 return 0;
192}
193
194/* Detect PS/2 support.
195 *
196 * Bit 5 (0x20) sets the PS/2 data direction; setting this high
197 * allows us to read data from the data lines. In theory we would get back
198 * 0xff but any peripheral attached to the port may drag some or all of the
199 * lines down to zero. So if we get back anything that isn't the contents
200 * of the data register we deem PS/2 support to be present.
201 *
202 * Some SPP ports have "half PS/2" ability - you can't turn off the line
203 * drivers, but an external peripheral with sufficiently beefy drivers of
204 * its own can overpower them and assert its own levels onto the bus, from
205 * where they can then be read back as normal. Ports with this property
206 * and the right type of device attached are likely to fail the SPP test,
207 * (as they will appear to have stuck bits) and so the fact that they might
208 * be misdetected here is rather academic.
209 */
210
211static int __devinit parport_PS2_supported(struct parport *pb)
212{
213 int ok = 0;
214
215 clear_epp_timeout(pb);
216
217 /* try to tri-state the buffer */
218 parport_gsc_data_reverse (pb);
219
220 parport_gsc_write_data(pb, 0x55);
221 if (parport_gsc_read_data(pb) != 0x55) ok++;
222
223 parport_gsc_write_data(pb, 0xaa);
224 if (parport_gsc_read_data(pb) != 0xaa) ok++;
225
226 /* cancel input mode */
227 parport_gsc_data_forward (pb);
228
229 if (ok) {
230 pb->modes |= PARPORT_MODE_TRISTATE;
231 } else {
232 struct parport_gsc_private *priv = pb->private_data;
233 priv->ctr_writable &= ~0x20;
234 }
235
236 return ok;
237}
238
239
240/* --- Initialisation code -------------------------------- */
241
242struct parport *__devinit parport_gsc_probe_port (unsigned long base,
243 unsigned long base_hi,
244 int irq, int dma,
245 struct pci_dev *dev)
246{
247 struct parport_gsc_private *priv;
248 struct parport_operations *ops;
249 struct parport tmp;
250 struct parport *p = &tmp;
251
252 priv = kmalloc (sizeof (struct parport_gsc_private), GFP_KERNEL);
253 if (!priv) {
254 printk (KERN_DEBUG "parport (0x%lx): no memory!\n", base);
255 return NULL;
256 }
257 ops = kmalloc (sizeof (struct parport_operations), GFP_KERNEL);
258 if (!ops) {
259 printk (KERN_DEBUG "parport (0x%lx): no memory for ops!\n",
260 base);
261 kfree (priv);
262 return NULL;
263 }
264 memcpy (ops, &parport_gsc_ops, sizeof (struct parport_operations));
265 priv->ctr = 0xc;
266 priv->ctr_writable = 0xff;
267 priv->dma_buf = 0;
268 priv->dma_handle = 0;
269 priv->dev = dev;
270 p->base = base;
271 p->base_hi = base_hi;
272 p->irq = irq;
273 p->dma = dma;
274 p->modes = PARPORT_MODE_PCSPP | PARPORT_MODE_SAFEININT;
275 p->ops = ops;
276 p->private_data = priv;
277 p->physport = p;
278 if (!parport_SPP_supported (p)) {
279 /* No port. */
280 kfree (priv);
281 return NULL;
282 }
283 parport_PS2_supported (p);
284
285 if (!(p = parport_register_port(base, PARPORT_IRQ_NONE,
286 PARPORT_DMA_NONE, ops))) {
287 kfree (priv);
288 kfree (ops);
289 return NULL;
290 }
291
292 p->base_hi = base_hi;
293 p->modes = tmp.modes;
294 p->size = (p->modes & PARPORT_MODE_EPP)?8:3;
295 p->private_data = priv;
296
297 printk(KERN_INFO "%s: PC-style at 0x%lx", p->name, p->base);
298 p->irq = irq;
299 if (p->irq == PARPORT_IRQ_AUTO) {
300 p->irq = PARPORT_IRQ_NONE;
301 }
302 if (p->irq != PARPORT_IRQ_NONE) {
303 printk(", irq %d", p->irq);
304
305 if (p->dma == PARPORT_DMA_AUTO) {
306 p->dma = PARPORT_DMA_NONE;
307 }
308 }
309 if (p->dma == PARPORT_DMA_AUTO) /* To use DMA, giving the irq
310 is mandatory (see above) */
311 p->dma = PARPORT_DMA_NONE;
312
313 printk(" [");
314#define printmode(x) {if(p->modes&PARPORT_MODE_##x){printk("%s%s",f?",":"",#x);f++;}}
315 {
316 int f = 0;
317 printmode(PCSPP);
318 printmode(TRISTATE);
319 printmode(COMPAT)
320 printmode(EPP);
321// printmode(ECP);
322// printmode(DMA);
323 }
324#undef printmode
325 printk("]\n");
326
327 if (p->irq != PARPORT_IRQ_NONE) {
328 if (request_irq (p->irq, parport_gsc_interrupt,
329 0, p->name, p)) {
330 printk (KERN_WARNING "%s: irq %d in use, "
331 "resorting to polled operation\n",
332 p->name, p->irq);
333 p->irq = PARPORT_IRQ_NONE;
334 p->dma = PARPORT_DMA_NONE;
335 }
336 }
337
338 /* Done probing. Now put the port into a sensible start-up state. */
339
340 parport_gsc_write_data(p, 0);
341 parport_gsc_data_forward (p);
342
343 /* Now that we've told the sharing engine about the port, and
344 found out its characteristics, let the high-level drivers
345 know about it. */
346 parport_announce_port (p);
347
348 return p;
349}
350
351
352#define PARPORT_GSC_OFFSET 0x800
353
354static int __initdata parport_count;
355
356static int __devinit parport_init_chip(struct parisc_device *dev)
357{
358 struct parport *p;
359 unsigned long port;
360
361 if (!dev->irq) {
362 printk("IRQ not found for parallel device at 0x%lx\n", dev->hpa);
363 return -ENODEV;
364 }
365
366 port = dev->hpa + PARPORT_GSC_OFFSET;
367
368 /* some older machines with ASP-chip don't support
369 * the enhanced parport modes.
370 */
371 if (boot_cpu_data.cpu_type > pcxt && !pdc_add_valid(port+4)) {
372
373 /* Initialize bidirectional-mode (0x10) & data-tranfer-mode #1 (0x20) */
374 printk("%s: initialize bidirectional-mode.\n", __FUNCTION__);
375 parport_writeb ( (0x10 + 0x20), port + 4);
376
377 } else {
378 printk("%s: enhanced parport-modes not supported.\n", __FUNCTION__);
379 }
380
381 p = parport_gsc_probe_port(port, 0, dev->irq,
382 /* PARPORT_IRQ_NONE */ PARPORT_DMA_NONE, NULL);
383 if (p)
384 parport_count++;
385 dev->dev.driver_data = p;
386
387 return 0;
388}
389
390static int __devexit parport_remove_chip(struct parisc_device *dev)
391{
392 struct parport *p = dev->dev.driver_data;
393 if (p) {
394 struct parport_gsc_private *priv = p->private_data;
395 struct parport_operations *ops = p->ops;
396 parport_remove_port(p);
397 if (p->dma != PARPORT_DMA_NONE)
398 free_dma(p->dma);
399 if (p->irq != PARPORT_IRQ_NONE)
400 free_irq(p->irq, p);
401 if (priv->dma_buf)
402 pci_free_consistent(priv->dev, PAGE_SIZE,
403 priv->dma_buf,
404 priv->dma_handle);
405 kfree (p->private_data);
406 parport_put_port(p);
407 kfree (ops); /* hope no-one cached it */
408 }
409 return 0;
410}
411
412static struct parisc_device_id parport_tbl[] = {
413 { HPHW_FIO, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x74 },
414 { 0, }
415};
416
417MODULE_DEVICE_TABLE(parisc, parport_tbl);
418
419static struct parisc_driver parport_driver = {
420 .name = "Parallel",
421 .id_table = parport_tbl,
422 .probe = parport_init_chip,
423 .remove = __devexit_p(parport_remove_chip),
424};
425
426int __devinit parport_gsc_init(void)
427{
428 return register_parisc_driver(&parport_driver);
429}
430
431static void __devexit parport_gsc_exit(void)
432{
433 unregister_parisc_driver(&parport_driver);
434}
435
436module_init(parport_gsc_init);
437module_exit(parport_gsc_exit);
diff --git a/drivers/parport/parport_gsc.h b/drivers/parport/parport_gsc.h
new file mode 100644
index 000000000000..662f6c1fee5d
--- /dev/null
+++ b/drivers/parport/parport_gsc.h
@@ -0,0 +1,222 @@
1/*
2 * Low-level parallel-support for PC-style hardware integrated in the
3 * LASI-Controller (on GSC-Bus) for HP-PARISC Workstations
4 *
5 * (C) 1999-2001 by Helge Deller <deller@gmx.de>
6 *
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 *
22 * based on parport_pc.c by
23 * Grant Guenther <grant@torque.net>
24 * Phil Blundell <Philip.Blundell@pobox.com>
25 * Tim Waugh <tim@cyberelk.demon.co.uk>
26 * Jose Renau <renau@acm.org>
27 * David Campbell <campbell@torque.net>
28 * Andrea Arcangeli
29 */
30
31#ifndef __DRIVERS_PARPORT_PARPORT_GSC_H
32#define __DRIVERS_PARPORT_PARPORT_GSC_H
33
34#include <asm/io.h>
35#include <linux/delay.h>
36
37#undef DEBUG_PARPORT /* undefine for production */
38#define DELAY_TIME 0
39
40#if DELAY_TIME == 0
41#define parport_readb gsc_readb
42#define parport_writeb gsc_writeb
43#else
44static __inline__ unsigned char parport_readb( unsigned long port )
45{
46 udelay(DELAY_TIME);
47 return gsc_readb(port);
48}
49
50static __inline__ void parport_writeb( unsigned char value, unsigned long port )
51{
52 gsc_writeb(value,port);
53 udelay(DELAY_TIME);
54}
55#endif
56
57/* --- register definitions ------------------------------- */
58
59#define EPPDATA(p) ((p)->base + 0x4)
60#define EPPADDR(p) ((p)->base + 0x3)
61#define CONTROL(p) ((p)->base + 0x2)
62#define STATUS(p) ((p)->base + 0x1)
63#define DATA(p) ((p)->base + 0x0)
64
65struct parport_gsc_private {
66 /* Contents of CTR. */
67 unsigned char ctr;
68
69 /* Bitmask of writable CTR bits. */
70 unsigned char ctr_writable;
71
72 /* Number of bytes per portword. */
73 int pword;
74
75 /* Not used yet. */
76 int readIntrThreshold;
77 int writeIntrThreshold;
78
79 /* buffer suitable for DMA, if DMA enabled */
80 char *dma_buf;
81 dma_addr_t dma_handle;
82 struct pci_dev *dev;
83};
84
85static inline void parport_gsc_write_data(struct parport *p, unsigned char d)
86{
87#ifdef DEBUG_PARPORT
88 printk (KERN_DEBUG "parport_gsc_write_data(%p,0x%02x)\n", p, d);
89#endif
90 parport_writeb(d, DATA(p));
91}
92
93static inline unsigned char parport_gsc_read_data(struct parport *p)
94{
95 unsigned char val = parport_readb (DATA (p));
96#ifdef DEBUG_PARPORT
97 printk (KERN_DEBUG "parport_gsc_read_data(%p) = 0x%02x\n",
98 p, val);
99#endif
100 return val;
101}
102
103/* __parport_gsc_frob_control differs from parport_gsc_frob_control in that
104 * it doesn't do any extra masking. */
105static inline unsigned char __parport_gsc_frob_control(struct parport *p,
106 unsigned char mask,
107 unsigned char val)
108{
109 struct parport_gsc_private *priv = p->physport->private_data;
110 unsigned char ctr = priv->ctr;
111#ifdef DEBUG_PARPORT
112 printk (KERN_DEBUG
113 "__parport_gsc_frob_control(%02x,%02x): %02x -> %02x\n",
114 mask, val, ctr, ((ctr & ~mask) ^ val) & priv->ctr_writable);
115#endif
116 ctr = (ctr & ~mask) ^ val;
117 ctr &= priv->ctr_writable; /* only write writable bits. */
118 parport_writeb (ctr, CONTROL (p));
119 priv->ctr = ctr; /* Update soft copy */
120 return ctr;
121}
122
123static inline void parport_gsc_data_reverse(struct parport *p)
124{
125 __parport_gsc_frob_control (p, 0x20, 0x20);
126}
127
128static inline void parport_gsc_data_forward(struct parport *p)
129{
130 __parport_gsc_frob_control (p, 0x20, 0x00);
131}
132
133static inline void parport_gsc_write_control(struct parport *p,
134 unsigned char d)
135{
136 const unsigned char wm = (PARPORT_CONTROL_STROBE |
137 PARPORT_CONTROL_AUTOFD |
138 PARPORT_CONTROL_INIT |
139 PARPORT_CONTROL_SELECT);
140
141 /* Take this out when drivers have adapted to newer interface. */
142 if (d & 0x20) {
143 printk (KERN_DEBUG "%s (%s): use data_reverse for this!\n",
144 p->name, p->cad->name);
145 parport_gsc_data_reverse (p);
146 }
147
148 __parport_gsc_frob_control (p, wm, d & wm);
149}
150
151static inline unsigned char parport_gsc_read_control(struct parport *p)
152{
153 const unsigned char rm = (PARPORT_CONTROL_STROBE |
154 PARPORT_CONTROL_AUTOFD |
155 PARPORT_CONTROL_INIT |
156 PARPORT_CONTROL_SELECT);
157 const struct parport_gsc_private *priv = p->physport->private_data;
158 return priv->ctr & rm; /* Use soft copy */
159}
160
161static inline unsigned char parport_gsc_frob_control(struct parport *p,
162 unsigned char mask,
163 unsigned char val)
164{
165 const unsigned char wm = (PARPORT_CONTROL_STROBE |
166 PARPORT_CONTROL_AUTOFD |
167 PARPORT_CONTROL_INIT |
168 PARPORT_CONTROL_SELECT);
169
170 /* Take this out when drivers have adapted to newer interface. */
171 if (mask & 0x20) {
172 printk (KERN_DEBUG "%s (%s): use data_%s for this!\n",
173 p->name, p->cad->name,
174 (val & 0x20) ? "reverse" : "forward");
175 if (val & 0x20)
176 parport_gsc_data_reverse (p);
177 else
178 parport_gsc_data_forward (p);
179 }
180
181 /* Restrict mask and val to control lines. */
182 mask &= wm;
183 val &= wm;
184
185 return __parport_gsc_frob_control (p, mask, val);
186}
187
188static inline unsigned char parport_gsc_read_status(struct parport *p)
189{
190 return parport_readb (STATUS(p));
191}
192
193static inline void parport_gsc_disable_irq(struct parport *p)
194{
195 __parport_gsc_frob_control (p, 0x10, 0x00);
196}
197
198static inline void parport_gsc_enable_irq(struct parport *p)
199{
200 __parport_gsc_frob_control (p, 0x10, 0x10);
201}
202
203extern void parport_gsc_release_resources(struct parport *p);
204
205extern int parport_gsc_claim_resources(struct parport *p);
206
207extern void parport_gsc_init_state(struct pardevice *, struct parport_state *s);
208
209extern void parport_gsc_save_state(struct parport *p, struct parport_state *s);
210
211extern void parport_gsc_restore_state(struct parport *p, struct parport_state *s);
212
213extern void parport_gsc_inc_use_count(void);
214
215extern void parport_gsc_dec_use_count(void);
216
217extern struct parport *parport_gsc_probe_port(unsigned long base,
218 unsigned long base_hi,
219 int irq, int dma,
220 struct pci_dev *dev);
221
222#endif /* __DRIVERS_PARPORT_PARPORT_GSC_H */
diff --git a/drivers/parport/parport_mfc3.c b/drivers/parport/parport_mfc3.c
new file mode 100644
index 000000000000..c85364765ef8
--- /dev/null
+++ b/drivers/parport/parport_mfc3.c
@@ -0,0 +1,404 @@
1/* Low-level parallel port routines for the Multiface 3 card
2 *
3 * Author: Joerg Dorchain <joerg@dorchain.net>
4 *
5 * (C) The elitist m68k Users(TM)
6 *
7 * based on the existing parport_amiga and lp_mfc
8 *
9 *
10 * From the MFC3 documentation:
11 *
12 * Miscellaneous PIA Details
13 * -------------------------
14 *
15 * The two open-drain interrupt outputs /IRQA and /IRQB are routed to
16 * /INT2 of the Z2 bus.
17 *
18 * The CPU data bus of the PIA (D0-D7) is connected to D8-D15 on the Z2
19 * bus. This means that any PIA registers are accessed at even addresses.
20 *
21 * Centronics Pin Connections for the PIA
22 * --------------------------------------
23 *
24 * The following table shows the connections between the PIA and the
25 * Centronics interface connector. These connections implement a single, but
26 * very complete, Centronics type interface. The Pin column gives the pin
27 * numbers of the PIA. The Centronics pin numbers can be found in the section
28 * "Parallel Connectors".
29 *
30 *
31 * Pin | PIA | Dir | Centronics Names
32 * -------+-----+-----+---------------------------------------------------------
33 * 19 | CB2 | --> | /STROBE (aka /DRDY)
34 * 10-17 | PBx | <-> | DATA0 - DATA7
35 * 18 | CB1 | <-- | /ACK
36 * 40 | CA1 | <-- | BUSY
37 * 3 | PA1 | <-- | PAPER-OUT (aka POUT)
38 * 4 | PA2 | <-- | SELECTED (aka SEL)
39 * 9 | PA7 | --> | /INIT (aka /RESET or /INPUT-PRIME)
40 * 6 | PA4 | <-- | /ERROR (aka /FAULT)
41 * 7 | PA5 | --> | DIR (aka /SELECT-IN)
42 * 8 | PA6 | --> | /AUTO-FEED-XT
43 * 39 | CA2 | --> | open
44 * 5 | PA3 | <-- | /ACK (same as CB1!)
45 * 2 | PA0 | <-- | BUSY (same as CA1!)
46 * -------+-----+-----+---------------------------------------------------------
47 *
48 * Should be enough to understand some of the driver.
49 *
50 * Per convention for normal use the port registers are visible.
51 * If you need the data direction registers, restore the value in the
52 * control register.
53 */
54
55#include "multiface.h"
56#include <linux/module.h>
57#include <linux/init.h>
58#include <linux/parport.h>
59#include <linux/delay.h>
60#include <linux/mc6821.h>
61#include <linux/zorro.h>
62#include <linux/interrupt.h>
63#include <asm/setup.h>
64#include <asm/amigahw.h>
65#include <asm/irq.h>
66#include <asm/amigaints.h>
67
68/* Maximum Number of Cards supported */
69#define MAX_MFC 5
70
71#undef DEBUG
72#ifdef DEBUG
73#define DPRINTK printk
74#else
75static inline int DPRINTK(void *nothing, ...) {return 0;}
76#endif
77
78static struct parport *this_port[MAX_MFC] = {NULL, };
79static volatile int dummy; /* for trigger readds */
80
81#define pia(dev) ((struct pia *)(dev->base))
82static struct parport_operations pp_mfc3_ops;
83
84static void mfc3_write_data(struct parport *p, unsigned char data)
85{
86DPRINTK(KERN_DEBUG "write_data %c\n",data);
87
88 dummy = pia(p)->pprb; /* clears irq bit */
89 /* Triggers also /STROBE.*/
90 pia(p)->pprb = data;
91}
92
93static unsigned char mfc3_read_data(struct parport *p)
94{
95 /* clears interrupt bit. Triggers also /STROBE. */
96 return pia(p)->pprb;
97}
98
99static unsigned char control_pc_to_mfc3(unsigned char control)
100{
101 unsigned char ret = 32|64;
102
103 if (control & PARPORT_CONTROL_SELECT) /* XXX: What is SELECP? */
104 ret &= ~32; /* /SELECT_IN */
105 if (control & PARPORT_CONTROL_INIT) /* INITP */
106 ret |= 128;
107 if (control & PARPORT_CONTROL_AUTOFD) /* AUTOLF */
108 ret &= ~64;
109 if (control & PARPORT_CONTROL_STROBE) /* Strobe */
110 /* Handled directly by hardware */;
111 return ret;
112}
113
114static unsigned char control_mfc3_to_pc(unsigned char control)
115{
116 unsigned char ret = PARPORT_CONTROL_STROBE
117 | PARPORT_CONTROL_AUTOFD | PARPORT_CONTROL_SELECT;
118
119 if (control & 128) /* /INITP */
120 ret |= PARPORT_CONTROL_INIT;
121 if (control & 64) /* /AUTOLF */
122 ret &= ~PARPORT_CONTROL_AUTOFD;
123 if (control & 32) /* /SELECT_IN */
124 ret &= ~PARPORT_CONTROL_SELECT;
125 return ret;
126}
127
128static void mfc3_write_control(struct parport *p, unsigned char control)
129{
130DPRINTK(KERN_DEBUG "write_control %02x\n",control);
131 pia(p)->ppra = (pia(p)->ppra & 0x1f) | control_pc_to_mfc3(control);
132}
133
134static unsigned char mfc3_read_control( struct parport *p)
135{
136DPRINTK(KERN_DEBUG "read_control \n");
137 return control_mfc3_to_pc(pia(p)->ppra & 0xe0);
138}
139
140static unsigned char mfc3_frob_control( struct parport *p, unsigned char mask, unsigned char val)
141{
142 unsigned char old;
143
144DPRINTK(KERN_DEBUG "frob_control mask %02x, value %02x\n",mask,val);
145 old = mfc3_read_control(p);
146 mfc3_write_control(p, (old & ~mask) ^ val);
147 return old;
148}
149
150#if 0 /* currently unused */
151static unsigned char status_pc_to_mfc3(unsigned char status)
152{
153 unsigned char ret = 1;
154
155 if (status & PARPORT_STATUS_BUSY) /* Busy */
156 ret &= ~1;
157 if (status & PARPORT_STATUS_ACK) /* Ack */
158 ret |= 8;
159 if (status & PARPORT_STATUS_PAPEROUT) /* PaperOut */
160 ret |= 2;
161 if (status & PARPORT_STATUS_SELECT) /* select */
162 ret |= 4;
163 if (status & PARPORT_STATUS_ERROR) /* error */
164 ret |= 16;
165 return ret;
166}
167#endif
168
169static unsigned char status_mfc3_to_pc(unsigned char status)
170{
171 unsigned char ret = PARPORT_STATUS_BUSY;
172
173 if (status & 1) /* Busy */
174 ret &= ~PARPORT_STATUS_BUSY;
175 if (status & 2) /* PaperOut */
176 ret |= PARPORT_STATUS_PAPEROUT;
177 if (status & 4) /* Selected */
178 ret |= PARPORT_STATUS_SELECT;
179 if (status & 8) /* Ack */
180 ret |= PARPORT_STATUS_ACK;
181 if (status & 16) /* /ERROR */
182 ret |= PARPORT_STATUS_ERROR;
183
184 return ret;
185}
186
187#if 0 /* currently unused */
188static void mfc3_write_status( struct parport *p, unsigned char status)
189{
190DPRINTK(KERN_DEBUG "write_status %02x\n",status);
191 pia(p)->ppra = (pia(p)->ppra & 0xe0) | status_pc_to_mfc3(status);
192}
193#endif
194
195static unsigned char mfc3_read_status(struct parport *p)
196{
197 unsigned char status;
198
199 status = status_mfc3_to_pc(pia(p)->ppra & 0x1f);
200DPRINTK(KERN_DEBUG "read_status %02x\n", status);
201 return status;
202}
203
204#if 0 /* currently unused */
205static void mfc3_change_mode( struct parport *p, int m)
206{
207 /* XXX: This port only has one mode, and I am
208 not sure about the corresponding PC-style mode*/
209}
210#endif
211
212static int use_cnt = 0;
213
214static irqreturn_t mfc3_interrupt(int irq, void *dev_id, struct pt_regs *regs)
215{
216 int i;
217
218 for( i = 0; i < MAX_MFC; i++)
219 if (this_port[i] != NULL)
220 if (pia(this_port[i])->crb & 128) { /* Board caused interrupt */
221 dummy = pia(this_port[i])->pprb; /* clear irq bit */
222 parport_generic_irq(irq, this_port[i], regs);
223 }
224 return IRQ_HANDLED;
225}
226
227static void mfc3_enable_irq(struct parport *p)
228{
229 pia(p)->crb |= PIA_C1_ENABLE_IRQ;
230}
231
232static void mfc3_disable_irq(struct parport *p)
233{
234 pia(p)->crb &= ~PIA_C1_ENABLE_IRQ;
235}
236
237static void mfc3_data_forward(struct parport *p)
238{
239 DPRINTK(KERN_DEBUG "forward\n");
240 pia(p)->crb &= ~PIA_DDR; /* make data direction register visible */
241 pia(p)->pddrb = 255; /* all pins output */
242 pia(p)->crb |= PIA_DDR; /* make data register visible - default */
243}
244
245static void mfc3_data_reverse(struct parport *p)
246{
247 DPRINTK(KERN_DEBUG "reverse\n");
248 pia(p)->crb &= ~PIA_DDR; /* make data direction register visible */
249 pia(p)->pddrb = 0; /* all pins input */
250 pia(p)->crb |= PIA_DDR; /* make data register visible - default */
251}
252
253static void mfc3_init_state(struct pardevice *dev, struct parport_state *s)
254{
255 s->u.amiga.data = 0;
256 s->u.amiga.datadir = 255;
257 s->u.amiga.status = 0;
258 s->u.amiga.statusdir = 0xe0;
259}
260
261static void mfc3_save_state(struct parport *p, struct parport_state *s)
262{
263 s->u.amiga.data = pia(p)->pprb;
264 pia(p)->crb &= ~PIA_DDR;
265 s->u.amiga.datadir = pia(p)->pddrb;
266 pia(p)->crb |= PIA_DDR;
267 s->u.amiga.status = pia(p)->ppra;
268 pia(p)->cra &= ~PIA_DDR;
269 s->u.amiga.statusdir = pia(p)->pddrb;
270 pia(p)->cra |= PIA_DDR;
271}
272
273static void mfc3_restore_state(struct parport *p, struct parport_state *s)
274{
275 pia(p)->pprb = s->u.amiga.data;
276 pia(p)->crb &= ~PIA_DDR;
277 pia(p)->pddrb = s->u.amiga.datadir;
278 pia(p)->crb |= PIA_DDR;
279 pia(p)->ppra = s->u.amiga.status;
280 pia(p)->cra &= ~PIA_DDR;
281 pia(p)->pddrb = s->u.amiga.statusdir;
282 pia(p)->cra |= PIA_DDR;
283}
284
285static struct parport_operations pp_mfc3_ops = {
286 .write_data = mfc3_write_data,
287 .read_data = mfc3_read_data,
288
289 .write_control = mfc3_write_control,
290 .read_control = mfc3_read_control,
291 .frob_control = mfc3_frob_control,
292
293 .read_status = mfc3_read_status,
294
295 .enable_irq = mfc3_enable_irq,
296 .disable_irq = mfc3_disable_irq,
297
298 .data_forward = mfc3_data_forward,
299 .data_reverse = mfc3_data_reverse,
300
301 .init_state = mfc3_init_state,
302 .save_state = mfc3_save_state,
303 .restore_state = mfc3_restore_state,
304
305 .epp_write_data = parport_ieee1284_epp_write_data,
306 .epp_read_data = parport_ieee1284_epp_read_data,
307 .epp_write_addr = parport_ieee1284_epp_write_addr,
308 .epp_read_addr = parport_ieee1284_epp_read_addr,
309
310 .ecp_write_data = parport_ieee1284_ecp_write_data,
311 .ecp_read_data = parport_ieee1284_ecp_read_data,
312 .ecp_write_addr = parport_ieee1284_ecp_write_addr,
313
314 .compat_write_data = parport_ieee1284_write_compat,
315 .nibble_read_data = parport_ieee1284_read_nibble,
316 .byte_read_data = parport_ieee1284_read_byte,
317
318 .owner = THIS_MODULE,
319};
320
321/* ----------- Initialisation code --------------------------------- */
322
323static int __init parport_mfc3_init(void)
324{
325 struct parport *p;
326 int pias = 0;
327 struct pia *pp;
328 struct zorro_dev *z = NULL;
329
330 if (!MACH_IS_AMIGA)
331 return -ENODEV;
332
333 while ((z = zorro_find_device(ZORRO_PROD_BSC_MULTIFACE_III, z))) {
334 unsigned long piabase = z->resource.start+PIABASE;
335 if (!request_mem_region(piabase, sizeof(struct pia), "PIA"))
336 continue;
337
338 pp = (struct pia *)ZTWO_VADDR(piabase);
339 pp->crb = 0;
340 pp->pddrb = 255; /* all data pins output */
341 pp->crb = PIA_DDR|32|8;
342 dummy = pp->pddrb; /* reading clears interrupt */
343 pp->cra = 0;
344 pp->pddra = 0xe0; /* /RESET, /DIR ,/AUTO-FEED output */
345 pp->cra = PIA_DDR;
346 pp->ppra = 0; /* reset printer */
347 udelay(10);
348 pp->ppra = 128;
349 p = parport_register_port((unsigned long)pp, IRQ_AMIGA_PORTS,
350 PARPORT_DMA_NONE, &pp_mfc3_ops);
351 if (!p)
352 goto out_port;
353
354 if (p->irq != PARPORT_IRQ_NONE) {
355 if (use_cnt++ == 0)
356 if (request_irq(IRQ_AMIGA_PORTS, mfc3_interrupt, SA_SHIRQ, p->name, &pp_mfc3_ops))
357 goto out_irq;
358 }
359
360 this_port[pias++] = p;
361 printk(KERN_INFO "%s: Multiface III port using irq\n", p->name);
362 /* XXX: set operating mode */
363
364 p->private_data = (void *)piabase;
365 parport_announce_port (p);
366
367 if (pias >= MAX_MFC)
368 break;
369 continue;
370
371 out_irq:
372 parport_put_port(p);
373 out_port:
374 release_mem_region(piabase, sizeof(struct pia));
375 }
376
377 return pias ? 0 : -ENODEV;
378}
379
380static void __exit parport_mfc3_exit(void)
381{
382 int i;
383
384 for (i = 0; i < MAX_MFC; i++) {
385 if (!this_port[i])
386 continue;
387 parport_remove_port(this_port[i]);
388 if (!this_port[i]->irq != PARPORT_IRQ_NONE) {
389 if (--use_cnt == 0)
390 free_irq(IRQ_AMIGA_PORTS, &pp_mfc3_ops);
391 }
392 release_mem_region(ZTWO_PADDR(this_port[i]->private_data), sizeof(struct pia));
393 parport_put_port(this_port[i]);
394 }
395}
396
397
398MODULE_AUTHOR("Joerg Dorchain <joerg@dorchain.net>");
399MODULE_DESCRIPTION("Parport Driver for Multiface 3 expansion cards Paralllel Port");
400MODULE_SUPPORTED_DEVICE("Multiface 3 Parallel Port");
401MODULE_LICENSE("GPL");
402
403module_init(parport_mfc3_init)
404module_exit(parport_mfc3_exit)
diff --git a/drivers/parport/parport_pc.c b/drivers/parport/parport_pc.c
new file mode 100644
index 000000000000..c5774e7855d0
--- /dev/null
+++ b/drivers/parport/parport_pc.c
@@ -0,0 +1,3415 @@
1/* Low-level parallel-port routines for 8255-based PC-style hardware.
2 *
3 * Authors: Phil Blundell <philb@gnu.org>
4 * Tim Waugh <tim@cyberelk.demon.co.uk>
5 * Jose Renau <renau@acm.org>
6 * David Campbell <campbell@torque.net>
7 * Andrea Arcangeli
8 *
9 * based on work by Grant Guenther <grant@torque.net> and Phil Blundell.
10 *
11 * Cleaned up include files - Russell King <linux@arm.uk.linux.org>
12 * DMA support - Bert De Jonghe <bert@sophis.be>
13 * Many ECP bugs fixed. Fred Barnes & Jamie Lokier, 1999
14 * More PCI support now conditional on CONFIG_PCI, 03/2001, Paul G.
15 * Various hacks, Fred Barnes, 04/2001
16 * Updated probing logic - Adam Belay <ambx1@neo.rr.com>
17 */
18
19/* This driver should work with any hardware that is broadly compatible
20 * with that in the IBM PC. This applies to the majority of integrated
21 * I/O chipsets that are commonly available. The expected register
22 * layout is:
23 *
24 * base+0 data
25 * base+1 status
26 * base+2 control
27 *
28 * In addition, there are some optional registers:
29 *
30 * base+3 EPP address
31 * base+4 EPP data
32 * base+0x400 ECP config A
33 * base+0x401 ECP config B
34 * base+0x402 ECP control
35 *
36 * All registers are 8 bits wide and read/write. If your hardware differs
37 * only in register addresses (eg because your registers are on 32-bit
38 * word boundaries) then you can alter the constants in parport_pc.h to
39 * accommodate this.
40 *
41 * Note that the ECP registers may not start at offset 0x400 for PCI cards,
42 * but rather will start at port->base_hi.
43 */
44
45#include <linux/config.h>
46#include <linux/module.h>
47#include <linux/init.h>
48#include <linux/sched.h>
49#include <linux/delay.h>
50#include <linux/errno.h>
51#include <linux/interrupt.h>
52#include <linux/ioport.h>
53#include <linux/kernel.h>
54#include <linux/slab.h>
55#include <linux/pci.h>
56#include <linux/pnp.h>
57#include <linux/sysctl.h>
58
59#include <asm/io.h>
60#include <asm/dma.h>
61#include <asm/uaccess.h>
62
63#include <linux/parport.h>
64#include <linux/parport_pc.h>
65#include <linux/via.h>
66#include <asm/parport.h>
67
68#define PARPORT_PC_MAX_PORTS PARPORT_MAX
69
70/* ECR modes */
71#define ECR_SPP 00
72#define ECR_PS2 01
73#define ECR_PPF 02
74#define ECR_ECP 03
75#define ECR_EPP 04
76#define ECR_VND 05
77#define ECR_TST 06
78#define ECR_CNF 07
79#define ECR_MODE_MASK 0xe0
80#define ECR_WRITE(p,v) frob_econtrol((p),0xff,(v))
81
82#undef DEBUG
83
84#ifdef DEBUG
85#define DPRINTK printk
86#else
87#define DPRINTK(stuff...)
88#endif
89
90
91#define NR_SUPERIOS 3
92static struct superio_struct { /* For Super-IO chips autodetection */
93 int io;
94 int irq;
95 int dma;
96} superios[NR_SUPERIOS] __devinitdata = { {0,},};
97
98static int user_specified;
99#if defined(CONFIG_PARPORT_PC_SUPERIO) || \
100 (defined(CONFIG_PARPORT_1284) && defined(CONFIG_PARPORT_PC_FIFO))
101static int verbose_probing;
102#endif
103static int pci_registered_parport;
104static int pnp_registered_parport;
105
106/* frob_control, but for ECR */
107static void frob_econtrol (struct parport *pb, unsigned char m,
108 unsigned char v)
109{
110 unsigned char ectr = 0;
111
112 if (m != 0xff)
113 ectr = inb (ECONTROL (pb));
114
115 DPRINTK (KERN_DEBUG "frob_econtrol(%02x,%02x): %02x -> %02x\n",
116 m, v, ectr, (ectr & ~m) ^ v);
117
118 outb ((ectr & ~m) ^ v, ECONTROL (pb));
119}
120
121static __inline__ void frob_set_mode (struct parport *p, int mode)
122{
123 frob_econtrol (p, ECR_MODE_MASK, mode << 5);
124}
125
126#ifdef CONFIG_PARPORT_PC_FIFO
127/* Safely change the mode bits in the ECR
128 Returns:
129 0 : Success
130 -EBUSY: Could not drain FIFO in some finite amount of time,
131 mode not changed!
132 */
133static int change_mode(struct parport *p, int m)
134{
135 const struct parport_pc_private *priv = p->physport->private_data;
136 unsigned char oecr;
137 int mode;
138
139 DPRINTK(KERN_INFO "parport change_mode ECP-ISA to mode 0x%02x\n",m);
140
141 if (!priv->ecr) {
142 printk (KERN_DEBUG "change_mode: but there's no ECR!\n");
143 return 0;
144 }
145
146 /* Bits <7:5> contain the mode. */
147 oecr = inb (ECONTROL (p));
148 mode = (oecr >> 5) & 0x7;
149 if (mode == m) return 0;
150
151 if (mode >= 2 && !(priv->ctr & 0x20)) {
152 /* This mode resets the FIFO, so we may
153 * have to wait for it to drain first. */
154 unsigned long expire = jiffies + p->physport->cad->timeout;
155 int counter;
156 switch (mode) {
157 case ECR_PPF: /* Parallel Port FIFO mode */
158 case ECR_ECP: /* ECP Parallel Port mode */
159 /* Busy wait for 200us */
160 for (counter = 0; counter < 40; counter++) {
161 if (inb (ECONTROL (p)) & 0x01)
162 break;
163 if (signal_pending (current)) break;
164 udelay (5);
165 }
166
167 /* Poll slowly. */
168 while (!(inb (ECONTROL (p)) & 0x01)) {
169 if (time_after_eq (jiffies, expire))
170 /* The FIFO is stuck. */
171 return -EBUSY;
172 __set_current_state (TASK_INTERRUPTIBLE);
173 schedule_timeout ((HZ + 99) / 100);
174 if (signal_pending (current))
175 break;
176 }
177 }
178 }
179
180 if (mode >= 2 && m >= 2) {
181 /* We have to go through mode 001 */
182 oecr &= ~(7 << 5);
183 oecr |= ECR_PS2 << 5;
184 ECR_WRITE (p, oecr);
185 }
186
187 /* Set the mode. */
188 oecr &= ~(7 << 5);
189 oecr |= m << 5;
190 ECR_WRITE (p, oecr);
191 return 0;
192}
193
194#ifdef CONFIG_PARPORT_1284
195/* Find FIFO lossage; FIFO is reset */
196#if 0
197static int get_fifo_residue (struct parport *p)
198{
199 int residue;
200 int cnfga;
201 const struct parport_pc_private *priv = p->physport->private_data;
202
203 /* Adjust for the contents of the FIFO. */
204 for (residue = priv->fifo_depth; ; residue--) {
205 if (inb (ECONTROL (p)) & 0x2)
206 /* Full up. */
207 break;
208
209 outb (0, FIFO (p));
210 }
211
212 printk (KERN_DEBUG "%s: %d PWords were left in FIFO\n", p->name,
213 residue);
214
215 /* Reset the FIFO. */
216 frob_set_mode (p, ECR_PS2);
217
218 /* Now change to config mode and clean up. FIXME */
219 frob_set_mode (p, ECR_CNF);
220 cnfga = inb (CONFIGA (p));
221 printk (KERN_DEBUG "%s: cnfgA contains 0x%02x\n", p->name, cnfga);
222
223 if (!(cnfga & (1<<2))) {
224 printk (KERN_DEBUG "%s: Accounting for extra byte\n", p->name);
225 residue++;
226 }
227
228 /* Don't care about partial PWords until support is added for
229 * PWord != 1 byte. */
230
231 /* Back to PS2 mode. */
232 frob_set_mode (p, ECR_PS2);
233
234 DPRINTK (KERN_DEBUG "*** get_fifo_residue: done residue collecting (ecr = 0x%2.2x)\n", inb (ECONTROL (p)));
235 return residue;
236}
237#endif /* 0 */
238#endif /* IEEE 1284 support */
239#endif /* FIFO support */
240
241/*
242 * Clear TIMEOUT BIT in EPP MODE
243 *
244 * This is also used in SPP detection.
245 */
246static int clear_epp_timeout(struct parport *pb)
247{
248 unsigned char r;
249
250 if (!(parport_pc_read_status(pb) & 0x01))
251 return 1;
252
253 /* To clear timeout some chips require double read */
254 parport_pc_read_status(pb);
255 r = parport_pc_read_status(pb);
256 outb (r | 0x01, STATUS (pb)); /* Some reset by writing 1 */
257 outb (r & 0xfe, STATUS (pb)); /* Others by writing 0 */
258 r = parport_pc_read_status(pb);
259
260 return !(r & 0x01);
261}
262
263/*
264 * Access functions.
265 *
266 * Most of these aren't static because they may be used by the
267 * parport_xxx_yyy macros. extern __inline__ versions of several
268 * of these are in parport_pc.h.
269 */
270
271static irqreturn_t parport_pc_interrupt(int irq, void *dev_id, struct pt_regs *regs)
272{
273 parport_generic_irq(irq, (struct parport *) dev_id, regs);
274 /* FIXME! Was it really ours? */
275 return IRQ_HANDLED;
276}
277
278static void parport_pc_init_state(struct pardevice *dev, struct parport_state *s)
279{
280 s->u.pc.ctr = 0xc;
281 if (dev->irq_func &&
282 dev->port->irq != PARPORT_IRQ_NONE)
283 /* Set ackIntEn */
284 s->u.pc.ctr |= 0x10;
285
286 s->u.pc.ecr = 0x34; /* NetMos chip can cause problems 0x24;
287 * D.Gruszka VScom */
288}
289
290static void parport_pc_save_state(struct parport *p, struct parport_state *s)
291{
292 const struct parport_pc_private *priv = p->physport->private_data;
293 s->u.pc.ctr = priv->ctr;
294 if (priv->ecr)
295 s->u.pc.ecr = inb (ECONTROL (p));
296}
297
298static void parport_pc_restore_state(struct parport *p, struct parport_state *s)
299{
300 struct parport_pc_private *priv = p->physport->private_data;
301 register unsigned char c = s->u.pc.ctr & priv->ctr_writable;
302 outb (c, CONTROL (p));
303 priv->ctr = c;
304 if (priv->ecr)
305 ECR_WRITE (p, s->u.pc.ecr);
306}
307
308#ifdef CONFIG_PARPORT_1284
309static size_t parport_pc_epp_read_data (struct parport *port, void *buf,
310 size_t length, int flags)
311{
312 size_t got = 0;
313
314 if (flags & PARPORT_W91284PIC) {
315 unsigned char status;
316 size_t left = length;
317
318 /* use knowledge about data lines..:
319 * nFault is 0 if there is at least 1 byte in the Warp's FIFO
320 * pError is 1 if there are 16 bytes in the Warp's FIFO
321 */
322 status = inb (STATUS (port));
323
324 while (!(status & 0x08) && (got < length)) {
325 if ((left >= 16) && (status & 0x20) && !(status & 0x08)) {
326 /* can grab 16 bytes from warp fifo */
327 if (!((long)buf & 0x03)) {
328 insl (EPPDATA (port), buf, 4);
329 } else {
330 insb (EPPDATA (port), buf, 16);
331 }
332 buf += 16;
333 got += 16;
334 left -= 16;
335 } else {
336 /* grab single byte from the warp fifo */
337 *((char *)buf) = inb (EPPDATA (port));
338 buf++;
339 got++;
340 left--;
341 }
342 status = inb (STATUS (port));
343 if (status & 0x01) {
344 /* EPP timeout should never occur... */
345 printk (KERN_DEBUG "%s: EPP timeout occurred while talking to "
346 "w91284pic (should not have done)\n", port->name);
347 clear_epp_timeout (port);
348 }
349 }
350 return got;
351 }
352 if ((flags & PARPORT_EPP_FAST) && (length > 1)) {
353 if (!(((long)buf | length) & 0x03)) {
354 insl (EPPDATA (port), buf, (length >> 2));
355 } else {
356 insb (EPPDATA (port), buf, length);
357 }
358 if (inb (STATUS (port)) & 0x01) {
359 clear_epp_timeout (port);
360 return -EIO;
361 }
362 return length;
363 }
364 for (; got < length; got++) {
365 *((char*)buf) = inb (EPPDATA(port));
366 buf++;
367 if (inb (STATUS (port)) & 0x01) {
368 /* EPP timeout */
369 clear_epp_timeout (port);
370 break;
371 }
372 }
373
374 return got;
375}
376
377static size_t parport_pc_epp_write_data (struct parport *port, const void *buf,
378 size_t length, int flags)
379{
380 size_t written = 0;
381
382 if ((flags & PARPORT_EPP_FAST) && (length > 1)) {
383 if (!(((long)buf | length) & 0x03)) {
384 outsl (EPPDATA (port), buf, (length >> 2));
385 } else {
386 outsb (EPPDATA (port), buf, length);
387 }
388 if (inb (STATUS (port)) & 0x01) {
389 clear_epp_timeout (port);
390 return -EIO;
391 }
392 return length;
393 }
394 for (; written < length; written++) {
395 outb (*((char*)buf), EPPDATA(port));
396 buf++;
397 if (inb (STATUS(port)) & 0x01) {
398 clear_epp_timeout (port);
399 break;
400 }
401 }
402
403 return written;
404}
405
406static size_t parport_pc_epp_read_addr (struct parport *port, void *buf,
407 size_t length, int flags)
408{
409 size_t got = 0;
410
411 if ((flags & PARPORT_EPP_FAST) && (length > 1)) {
412 insb (EPPADDR (port), buf, length);
413 if (inb (STATUS (port)) & 0x01) {
414 clear_epp_timeout (port);
415 return -EIO;
416 }
417 return length;
418 }
419 for (; got < length; got++) {
420 *((char*)buf) = inb (EPPADDR (port));
421 buf++;
422 if (inb (STATUS (port)) & 0x01) {
423 clear_epp_timeout (port);
424 break;
425 }
426 }
427
428 return got;
429}
430
431static size_t parport_pc_epp_write_addr (struct parport *port,
432 const void *buf, size_t length,
433 int flags)
434{
435 size_t written = 0;
436
437 if ((flags & PARPORT_EPP_FAST) && (length > 1)) {
438 outsb (EPPADDR (port), buf, length);
439 if (inb (STATUS (port)) & 0x01) {
440 clear_epp_timeout (port);
441 return -EIO;
442 }
443 return length;
444 }
445 for (; written < length; written++) {
446 outb (*((char*)buf), EPPADDR (port));
447 buf++;
448 if (inb (STATUS (port)) & 0x01) {
449 clear_epp_timeout (port);
450 break;
451 }
452 }
453
454 return written;
455}
456
457static size_t parport_pc_ecpepp_read_data (struct parport *port, void *buf,
458 size_t length, int flags)
459{
460 size_t got;
461
462 frob_set_mode (port, ECR_EPP);
463 parport_pc_data_reverse (port);
464 parport_pc_write_control (port, 0x4);
465 got = parport_pc_epp_read_data (port, buf, length, flags);
466 frob_set_mode (port, ECR_PS2);
467
468 return got;
469}
470
471static size_t parport_pc_ecpepp_write_data (struct parport *port,
472 const void *buf, size_t length,
473 int flags)
474{
475 size_t written;
476
477 frob_set_mode (port, ECR_EPP);
478 parport_pc_write_control (port, 0x4);
479 parport_pc_data_forward (port);
480 written = parport_pc_epp_write_data (port, buf, length, flags);
481 frob_set_mode (port, ECR_PS2);
482
483 return written;
484}
485
486static size_t parport_pc_ecpepp_read_addr (struct parport *port, void *buf,
487 size_t length, int flags)
488{
489 size_t got;
490
491 frob_set_mode (port, ECR_EPP);
492 parport_pc_data_reverse (port);
493 parport_pc_write_control (port, 0x4);
494 got = parport_pc_epp_read_addr (port, buf, length, flags);
495 frob_set_mode (port, ECR_PS2);
496
497 return got;
498}
499
500static size_t parport_pc_ecpepp_write_addr (struct parport *port,
501 const void *buf, size_t length,
502 int flags)
503{
504 size_t written;
505
506 frob_set_mode (port, ECR_EPP);
507 parport_pc_write_control (port, 0x4);
508 parport_pc_data_forward (port);
509 written = parport_pc_epp_write_addr (port, buf, length, flags);
510 frob_set_mode (port, ECR_PS2);
511
512 return written;
513}
514#endif /* IEEE 1284 support */
515
516#ifdef CONFIG_PARPORT_PC_FIFO
517static size_t parport_pc_fifo_write_block_pio (struct parport *port,
518 const void *buf, size_t length)
519{
520 int ret = 0;
521 const unsigned char *bufp = buf;
522 size_t left = length;
523 unsigned long expire = jiffies + port->physport->cad->timeout;
524 const int fifo = FIFO (port);
525 int poll_for = 8; /* 80 usecs */
526 const struct parport_pc_private *priv = port->physport->private_data;
527 const int fifo_depth = priv->fifo_depth;
528
529 port = port->physport;
530
531 /* We don't want to be interrupted every character. */
532 parport_pc_disable_irq (port);
533 /* set nErrIntrEn and serviceIntr */
534 frob_econtrol (port, (1<<4) | (1<<2), (1<<4) | (1<<2));
535
536 /* Forward mode. */
537 parport_pc_data_forward (port); /* Must be in PS2 mode */
538
539 while (left) {
540 unsigned char byte;
541 unsigned char ecrval = inb (ECONTROL (port));
542 int i = 0;
543
544 if (need_resched() && time_before (jiffies, expire))
545 /* Can't yield the port. */
546 schedule ();
547
548 /* Anyone else waiting for the port? */
549 if (port->waithead) {
550 printk (KERN_DEBUG "Somebody wants the port\n");
551 break;
552 }
553
554 if (ecrval & 0x02) {
555 /* FIFO is full. Wait for interrupt. */
556
557 /* Clear serviceIntr */
558 ECR_WRITE (port, ecrval & ~(1<<2));
559 false_alarm:
560 ret = parport_wait_event (port, HZ);
561 if (ret < 0) break;
562 ret = 0;
563 if (!time_before (jiffies, expire)) {
564 /* Timed out. */
565 printk (KERN_DEBUG "FIFO write timed out\n");
566 break;
567 }
568 ecrval = inb (ECONTROL (port));
569 if (!(ecrval & (1<<2))) {
570 if (need_resched() &&
571 time_before (jiffies, expire))
572 schedule ();
573
574 goto false_alarm;
575 }
576
577 continue;
578 }
579
580 /* Can't fail now. */
581 expire = jiffies + port->cad->timeout;
582
583 poll:
584 if (signal_pending (current))
585 break;
586
587 if (ecrval & 0x01) {
588 /* FIFO is empty. Blast it full. */
589 const int n = left < fifo_depth ? left : fifo_depth;
590 outsb (fifo, bufp, n);
591 bufp += n;
592 left -= n;
593
594 /* Adjust the poll time. */
595 if (i < (poll_for - 2)) poll_for--;
596 continue;
597 } else if (i++ < poll_for) {
598 udelay (10);
599 ecrval = inb (ECONTROL (port));
600 goto poll;
601 }
602
603 /* Half-full (call me an optimist) */
604 byte = *bufp++;
605 outb (byte, fifo);
606 left--;
607 }
608
609dump_parport_state ("leave fifo_write_block_pio", port);
610 return length - left;
611}
612
613static size_t parport_pc_fifo_write_block_dma (struct parport *port,
614 const void *buf, size_t length)
615{
616 int ret = 0;
617 unsigned long dmaflag;
618 size_t left = length;
619 const struct parport_pc_private *priv = port->physport->private_data;
620 dma_addr_t dma_addr, dma_handle;
621 size_t maxlen = 0x10000; /* max 64k per DMA transfer */
622 unsigned long start = (unsigned long) buf;
623 unsigned long end = (unsigned long) buf + length - 1;
624
625dump_parport_state ("enter fifo_write_block_dma", port);
626 if (end < MAX_DMA_ADDRESS) {
627 /* If it would cross a 64k boundary, cap it at the end. */
628 if ((start ^ end) & ~0xffffUL)
629 maxlen = 0x10000 - (start & 0xffff);
630
631 dma_addr = dma_handle = pci_map_single(priv->dev, (void *)buf, length,
632 PCI_DMA_TODEVICE);
633 } else {
634 /* above 16 MB we use a bounce buffer as ISA-DMA is not possible */
635 maxlen = PAGE_SIZE; /* sizeof(priv->dma_buf) */
636 dma_addr = priv->dma_handle;
637 dma_handle = 0;
638 }
639
640 port = port->physport;
641
642 /* We don't want to be interrupted every character. */
643 parport_pc_disable_irq (port);
644 /* set nErrIntrEn and serviceIntr */
645 frob_econtrol (port, (1<<4) | (1<<2), (1<<4) | (1<<2));
646
647 /* Forward mode. */
648 parport_pc_data_forward (port); /* Must be in PS2 mode */
649
650 while (left) {
651 unsigned long expire = jiffies + port->physport->cad->timeout;
652
653 size_t count = left;
654
655 if (count > maxlen)
656 count = maxlen;
657
658 if (!dma_handle) /* bounce buffer ! */
659 memcpy(priv->dma_buf, buf, count);
660
661 dmaflag = claim_dma_lock();
662 disable_dma(port->dma);
663 clear_dma_ff(port->dma);
664 set_dma_mode(port->dma, DMA_MODE_WRITE);
665 set_dma_addr(port->dma, dma_addr);
666 set_dma_count(port->dma, count);
667
668 /* Set DMA mode */
669 frob_econtrol (port, 1<<3, 1<<3);
670
671 /* Clear serviceIntr */
672 frob_econtrol (port, 1<<2, 0);
673
674 enable_dma(port->dma);
675 release_dma_lock(dmaflag);
676
677 /* assume DMA will be successful */
678 left -= count;
679 buf += count;
680 if (dma_handle) dma_addr += count;
681
682 /* Wait for interrupt. */
683 false_alarm:
684 ret = parport_wait_event (port, HZ);
685 if (ret < 0) break;
686 ret = 0;
687 if (!time_before (jiffies, expire)) {
688 /* Timed out. */
689 printk (KERN_DEBUG "DMA write timed out\n");
690 break;
691 }
692 /* Is serviceIntr set? */
693 if (!(inb (ECONTROL (port)) & (1<<2))) {
694 cond_resched();
695
696 goto false_alarm;
697 }
698
699 dmaflag = claim_dma_lock();
700 disable_dma(port->dma);
701 clear_dma_ff(port->dma);
702 count = get_dma_residue(port->dma);
703 release_dma_lock(dmaflag);
704
705 cond_resched(); /* Can't yield the port. */
706
707 /* Anyone else waiting for the port? */
708 if (port->waithead) {
709 printk (KERN_DEBUG "Somebody wants the port\n");
710 break;
711 }
712
713 /* update for possible DMA residue ! */
714 buf -= count;
715 left += count;
716 if (dma_handle) dma_addr -= count;
717 }
718
719 /* Maybe got here through break, so adjust for DMA residue! */
720 dmaflag = claim_dma_lock();
721 disable_dma(port->dma);
722 clear_dma_ff(port->dma);
723 left += get_dma_residue(port->dma);
724 release_dma_lock(dmaflag);
725
726 /* Turn off DMA mode */
727 frob_econtrol (port, 1<<3, 0);
728
729 if (dma_handle)
730 pci_unmap_single(priv->dev, dma_handle, length, PCI_DMA_TODEVICE);
731
732dump_parport_state ("leave fifo_write_block_dma", port);
733 return length - left;
734}
735
736/* Parallel Port FIFO mode (ECP chipsets) */
737static size_t parport_pc_compat_write_block_pio (struct parport *port,
738 const void *buf, size_t length,
739 int flags)
740{
741 size_t written;
742 int r;
743 unsigned long expire;
744 const struct parport_pc_private *priv = port->physport->private_data;
745
746 /* Special case: a timeout of zero means we cannot call schedule().
747 * Also if O_NONBLOCK is set then use the default implementation. */
748 if (port->physport->cad->timeout <= PARPORT_INACTIVITY_O_NONBLOCK)
749 return parport_ieee1284_write_compat (port, buf,
750 length, flags);
751
752 /* Set up parallel port FIFO mode.*/
753 parport_pc_data_forward (port); /* Must be in PS2 mode */
754 parport_pc_frob_control (port, PARPORT_CONTROL_STROBE, 0);
755 r = change_mode (port, ECR_PPF); /* Parallel port FIFO */
756 if (r) printk (KERN_DEBUG "%s: Warning change_mode ECR_PPF failed\n", port->name);
757
758 port->physport->ieee1284.phase = IEEE1284_PH_FWD_DATA;
759
760 /* Write the data to the FIFO. */
761 if (port->dma != PARPORT_DMA_NONE)
762 written = parport_pc_fifo_write_block_dma (port, buf, length);
763 else
764 written = parport_pc_fifo_write_block_pio (port, buf, length);
765
766 /* Finish up. */
767 /* For some hardware we don't want to touch the mode until
768 * the FIFO is empty, so allow 4 seconds for each position
769 * in the fifo.
770 */
771 expire = jiffies + (priv->fifo_depth * HZ * 4);
772 do {
773 /* Wait for the FIFO to empty */
774 r = change_mode (port, ECR_PS2);
775 if (r != -EBUSY) {
776 break;
777 }
778 } while (time_before (jiffies, expire));
779 if (r == -EBUSY) {
780
781 printk (KERN_DEBUG "%s: FIFO is stuck\n", port->name);
782
783 /* Prevent further data transfer. */
784 frob_set_mode (port, ECR_TST);
785
786 /* Adjust for the contents of the FIFO. */
787 for (written -= priv->fifo_depth; ; written++) {
788 if (inb (ECONTROL (port)) & 0x2) {
789 /* Full up. */
790 break;
791 }
792 outb (0, FIFO (port));
793 }
794
795 /* Reset the FIFO and return to PS2 mode. */
796 frob_set_mode (port, ECR_PS2);
797 }
798
799 r = parport_wait_peripheral (port,
800 PARPORT_STATUS_BUSY,
801 PARPORT_STATUS_BUSY);
802 if (r)
803 printk (KERN_DEBUG
804 "%s: BUSY timeout (%d) in compat_write_block_pio\n",
805 port->name, r);
806
807 port->physport->ieee1284.phase = IEEE1284_PH_FWD_IDLE;
808
809 return written;
810}
811
812/* ECP */
813#ifdef CONFIG_PARPORT_1284
814static size_t parport_pc_ecp_write_block_pio (struct parport *port,
815 const void *buf, size_t length,
816 int flags)
817{
818 size_t written;
819 int r;
820 unsigned long expire;
821 const struct parport_pc_private *priv = port->physport->private_data;
822
823 /* Special case: a timeout of zero means we cannot call schedule().
824 * Also if O_NONBLOCK is set then use the default implementation. */
825 if (port->physport->cad->timeout <= PARPORT_INACTIVITY_O_NONBLOCK)
826 return parport_ieee1284_ecp_write_data (port, buf,
827 length, flags);
828
829 /* Switch to forward mode if necessary. */
830 if (port->physport->ieee1284.phase != IEEE1284_PH_FWD_IDLE) {
831 /* Event 47: Set nInit high. */
832 parport_frob_control (port,
833 PARPORT_CONTROL_INIT
834 | PARPORT_CONTROL_AUTOFD,
835 PARPORT_CONTROL_INIT
836 | PARPORT_CONTROL_AUTOFD);
837
838 /* Event 49: PError goes high. */
839 r = parport_wait_peripheral (port,
840 PARPORT_STATUS_PAPEROUT,
841 PARPORT_STATUS_PAPEROUT);
842 if (r) {
843 printk (KERN_DEBUG "%s: PError timeout (%d) "
844 "in ecp_write_block_pio\n", port->name, r);
845 }
846 }
847
848 /* Set up ECP parallel port mode.*/
849 parport_pc_data_forward (port); /* Must be in PS2 mode */
850 parport_pc_frob_control (port,
851 PARPORT_CONTROL_STROBE |
852 PARPORT_CONTROL_AUTOFD,
853 0);
854 r = change_mode (port, ECR_ECP); /* ECP FIFO */
855 if (r) printk (KERN_DEBUG "%s: Warning change_mode ECR_ECP failed\n", port->name);
856 port->physport->ieee1284.phase = IEEE1284_PH_FWD_DATA;
857
858 /* Write the data to the FIFO. */
859 if (port->dma != PARPORT_DMA_NONE)
860 written = parport_pc_fifo_write_block_dma (port, buf, length);
861 else
862 written = parport_pc_fifo_write_block_pio (port, buf, length);
863
864 /* Finish up. */
865 /* For some hardware we don't want to touch the mode until
866 * the FIFO is empty, so allow 4 seconds for each position
867 * in the fifo.
868 */
869 expire = jiffies + (priv->fifo_depth * (HZ * 4));
870 do {
871 /* Wait for the FIFO to empty */
872 r = change_mode (port, ECR_PS2);
873 if (r != -EBUSY) {
874 break;
875 }
876 } while (time_before (jiffies, expire));
877 if (r == -EBUSY) {
878
879 printk (KERN_DEBUG "%s: FIFO is stuck\n", port->name);
880
881 /* Prevent further data transfer. */
882 frob_set_mode (port, ECR_TST);
883
884 /* Adjust for the contents of the FIFO. */
885 for (written -= priv->fifo_depth; ; written++) {
886 if (inb (ECONTROL (port)) & 0x2) {
887 /* Full up. */
888 break;
889 }
890 outb (0, FIFO (port));
891 }
892
893 /* Reset the FIFO and return to PS2 mode. */
894 frob_set_mode (port, ECR_PS2);
895
896 /* Host transfer recovery. */
897 parport_pc_data_reverse (port); /* Must be in PS2 mode */
898 udelay (5);
899 parport_frob_control (port, PARPORT_CONTROL_INIT, 0);
900 r = parport_wait_peripheral (port, PARPORT_STATUS_PAPEROUT, 0);
901 if (r)
902 printk (KERN_DEBUG "%s: PE,1 timeout (%d) "
903 "in ecp_write_block_pio\n", port->name, r);
904
905 parport_frob_control (port,
906 PARPORT_CONTROL_INIT,
907 PARPORT_CONTROL_INIT);
908 r = parport_wait_peripheral (port,
909 PARPORT_STATUS_PAPEROUT,
910 PARPORT_STATUS_PAPEROUT);
911 if (r)
912 printk (KERN_DEBUG "%s: PE,2 timeout (%d) "
913 "in ecp_write_block_pio\n", port->name, r);
914 }
915
916 r = parport_wait_peripheral (port,
917 PARPORT_STATUS_BUSY,
918 PARPORT_STATUS_BUSY);
919 if(r)
920 printk (KERN_DEBUG
921 "%s: BUSY timeout (%d) in ecp_write_block_pio\n",
922 port->name, r);
923
924 port->physport->ieee1284.phase = IEEE1284_PH_FWD_IDLE;
925
926 return written;
927}
928
929#if 0
930static size_t parport_pc_ecp_read_block_pio (struct parport *port,
931 void *buf, size_t length,
932 int flags)
933{
934 size_t left = length;
935 size_t fifofull;
936 int r;
937 const int fifo = FIFO(port);
938 const struct parport_pc_private *priv = port->physport->private_data;
939 const int fifo_depth = priv->fifo_depth;
940 char *bufp = buf;
941
942 port = port->physport;
943DPRINTK (KERN_DEBUG "parport_pc: parport_pc_ecp_read_block_pio\n");
944dump_parport_state ("enter fcn", port);
945
946 /* Special case: a timeout of zero means we cannot call schedule().
947 * Also if O_NONBLOCK is set then use the default implementation. */
948 if (port->cad->timeout <= PARPORT_INACTIVITY_O_NONBLOCK)
949 return parport_ieee1284_ecp_read_data (port, buf,
950 length, flags);
951
952 if (port->ieee1284.mode == IEEE1284_MODE_ECPRLE) {
953 /* If the peripheral is allowed to send RLE compressed
954 * data, it is possible for a byte to expand to 128
955 * bytes in the FIFO. */
956 fifofull = 128;
957 } else {
958 fifofull = fifo_depth;
959 }
960
961 /* If the caller wants less than a full FIFO's worth of data,
962 * go through software emulation. Otherwise we may have to throw
963 * away data. */
964 if (length < fifofull)
965 return parport_ieee1284_ecp_read_data (port, buf,
966 length, flags);
967
968 if (port->ieee1284.phase != IEEE1284_PH_REV_IDLE) {
969 /* change to reverse-idle phase (must be in forward-idle) */
970
971 /* Event 38: Set nAutoFd low (also make sure nStrobe is high) */
972 parport_frob_control (port,
973 PARPORT_CONTROL_AUTOFD
974 | PARPORT_CONTROL_STROBE,
975 PARPORT_CONTROL_AUTOFD);
976 parport_pc_data_reverse (port); /* Must be in PS2 mode */
977 udelay (5);
978 /* Event 39: Set nInit low to initiate bus reversal */
979 parport_frob_control (port,
980 PARPORT_CONTROL_INIT,
981 0);
982 /* Event 40: Wait for nAckReverse (PError) to go low */
983 r = parport_wait_peripheral (port, PARPORT_STATUS_PAPEROUT, 0);
984 if (r) {
985 printk (KERN_DEBUG "%s: PE timeout Event 40 (%d) "
986 "in ecp_read_block_pio\n", port->name, r);
987 return 0;
988 }
989 }
990
991 /* Set up ECP FIFO mode.*/
992/* parport_pc_frob_control (port,
993 PARPORT_CONTROL_STROBE |
994 PARPORT_CONTROL_AUTOFD,
995 PARPORT_CONTROL_AUTOFD); */
996 r = change_mode (port, ECR_ECP); /* ECP FIFO */
997 if (r) printk (KERN_DEBUG "%s: Warning change_mode ECR_ECP failed\n", port->name);
998
999 port->ieee1284.phase = IEEE1284_PH_REV_DATA;
1000
1001 /* the first byte must be collected manually */
1002dump_parport_state ("pre 43", port);
1003 /* Event 43: Wait for nAck to go low */
1004 r = parport_wait_peripheral (port, PARPORT_STATUS_ACK, 0);
1005 if (r) {
1006 /* timed out while reading -- no data */
1007 printk (KERN_DEBUG "PIO read timed out (initial byte)\n");
1008 goto out_no_data;
1009 }
1010 /* read byte */
1011 *bufp++ = inb (DATA (port));
1012 left--;
1013dump_parport_state ("43-44", port);
1014 /* Event 44: nAutoFd (HostAck) goes high to acknowledge */
1015 parport_pc_frob_control (port,
1016 PARPORT_CONTROL_AUTOFD,
1017 0);
1018dump_parport_state ("pre 45", port);
1019 /* Event 45: Wait for nAck to go high */
1020/* r = parport_wait_peripheral (port, PARPORT_STATUS_ACK, PARPORT_STATUS_ACK); */
1021dump_parport_state ("post 45", port);
1022r = 0;
1023 if (r) {
1024 /* timed out while waiting for peripheral to respond to ack */
1025 printk (KERN_DEBUG "ECP PIO read timed out (waiting for nAck)\n");
1026
1027 /* keep hold of the byte we've got already */
1028 goto out_no_data;
1029 }
1030 /* Event 46: nAutoFd (HostAck) goes low to accept more data */
1031 parport_pc_frob_control (port,
1032 PARPORT_CONTROL_AUTOFD,
1033 PARPORT_CONTROL_AUTOFD);
1034
1035
1036dump_parport_state ("rev idle", port);
1037 /* Do the transfer. */
1038 while (left > fifofull) {
1039 int ret;
1040 unsigned long expire = jiffies + port->cad->timeout;
1041 unsigned char ecrval = inb (ECONTROL (port));
1042
1043 if (need_resched() && time_before (jiffies, expire))
1044 /* Can't yield the port. */
1045 schedule ();
1046
1047 /* At this point, the FIFO may already be full. In
1048 * that case ECP is already holding back the
1049 * peripheral (assuming proper design) with a delayed
1050 * handshake. Work fast to avoid a peripheral
1051 * timeout. */
1052
1053 if (ecrval & 0x01) {
1054 /* FIFO is empty. Wait for interrupt. */
1055dump_parport_state ("FIFO empty", port);
1056
1057 /* Anyone else waiting for the port? */
1058 if (port->waithead) {
1059 printk (KERN_DEBUG "Somebody wants the port\n");
1060 break;
1061 }
1062
1063 /* Clear serviceIntr */
1064 ECR_WRITE (port, ecrval & ~(1<<2));
1065 false_alarm:
1066dump_parport_state ("waiting", port);
1067 ret = parport_wait_event (port, HZ);
1068DPRINTK (KERN_DEBUG "parport_wait_event returned %d\n", ret);
1069 if (ret < 0)
1070 break;
1071 ret = 0;
1072 if (!time_before (jiffies, expire)) {
1073 /* Timed out. */
1074dump_parport_state ("timeout", port);
1075 printk (KERN_DEBUG "PIO read timed out\n");
1076 break;
1077 }
1078 ecrval = inb (ECONTROL (port));
1079 if (!(ecrval & (1<<2))) {
1080 if (need_resched() &&
1081 time_before (jiffies, expire)) {
1082 schedule ();
1083 }
1084 goto false_alarm;
1085 }
1086
1087 /* Depending on how the FIFO threshold was
1088 * set, how long interrupt service took, and
1089 * how fast the peripheral is, we might be
1090 * lucky and have a just filled FIFO. */
1091 continue;
1092 }
1093
1094 if (ecrval & 0x02) {
1095 /* FIFO is full. */
1096dump_parport_state ("FIFO full", port);
1097 insb (fifo, bufp, fifo_depth);
1098 bufp += fifo_depth;
1099 left -= fifo_depth;
1100 continue;
1101 }
1102
1103DPRINTK (KERN_DEBUG "*** ecp_read_block_pio: reading one byte from the FIFO\n");
1104
1105 /* FIFO not filled. We will cycle this loop for a while
1106 * and either the peripheral will fill it faster,
1107 * tripping a fast empty with insb, or we empty it. */
1108 *bufp++ = inb (fifo);
1109 left--;
1110 }
1111
1112 /* scoop up anything left in the FIFO */
1113 while (left && !(inb (ECONTROL (port) & 0x01))) {
1114 *bufp++ = inb (fifo);
1115 left--;
1116 }
1117
1118 port->ieee1284.phase = IEEE1284_PH_REV_IDLE;
1119dump_parport_state ("rev idle2", port);
1120
1121out_no_data:
1122
1123 /* Go to forward idle mode to shut the peripheral up (event 47). */
1124 parport_frob_control (port, PARPORT_CONTROL_INIT, PARPORT_CONTROL_INIT);
1125
1126 /* event 49: PError goes high */
1127 r = parport_wait_peripheral (port,
1128 PARPORT_STATUS_PAPEROUT,
1129 PARPORT_STATUS_PAPEROUT);
1130 if (r) {
1131 printk (KERN_DEBUG
1132 "%s: PE timeout FWDIDLE (%d) in ecp_read_block_pio\n",
1133 port->name, r);
1134 }
1135
1136 port->ieee1284.phase = IEEE1284_PH_FWD_IDLE;
1137
1138 /* Finish up. */
1139 {
1140 int lost = get_fifo_residue (port);
1141 if (lost)
1142 /* Shouldn't happen with compliant peripherals. */
1143 printk (KERN_DEBUG "%s: DATA LOSS (%d bytes)!\n",
1144 port->name, lost);
1145 }
1146
1147dump_parport_state ("fwd idle", port);
1148 return length - left;
1149}
1150#endif /* 0 */
1151#endif /* IEEE 1284 support */
1152#endif /* Allowed to use FIFO/DMA */
1153
1154
1155/*
1156 * ******************************************
1157 * INITIALISATION AND MODULE STUFF BELOW HERE
1158 * ******************************************
1159 */
1160
1161/* GCC is not inlining extern inline function later overwriten to non-inline,
1162 so we use outlined_ variants here. */
1163static struct parport_operations parport_pc_ops =
1164{
1165 .write_data = parport_pc_write_data,
1166 .read_data = parport_pc_read_data,
1167
1168 .write_control = parport_pc_write_control,
1169 .read_control = parport_pc_read_control,
1170 .frob_control = parport_pc_frob_control,
1171
1172 .read_status = parport_pc_read_status,
1173
1174 .enable_irq = parport_pc_enable_irq,
1175 .disable_irq = parport_pc_disable_irq,
1176
1177 .data_forward = parport_pc_data_forward,
1178 .data_reverse = parport_pc_data_reverse,
1179
1180 .init_state = parport_pc_init_state,
1181 .save_state = parport_pc_save_state,
1182 .restore_state = parport_pc_restore_state,
1183
1184 .epp_write_data = parport_ieee1284_epp_write_data,
1185 .epp_read_data = parport_ieee1284_epp_read_data,
1186 .epp_write_addr = parport_ieee1284_epp_write_addr,
1187 .epp_read_addr = parport_ieee1284_epp_read_addr,
1188
1189 .ecp_write_data = parport_ieee1284_ecp_write_data,
1190 .ecp_read_data = parport_ieee1284_ecp_read_data,
1191 .ecp_write_addr = parport_ieee1284_ecp_write_addr,
1192
1193 .compat_write_data = parport_ieee1284_write_compat,
1194 .nibble_read_data = parport_ieee1284_read_nibble,
1195 .byte_read_data = parport_ieee1284_read_byte,
1196
1197 .owner = THIS_MODULE,
1198};
1199
1200#ifdef CONFIG_PARPORT_PC_SUPERIO
1201/* Super-IO chipset detection, Winbond, SMSC */
1202static void __devinit show_parconfig_smsc37c669(int io, int key)
1203{
1204 int cr1,cr4,cra,cr23,cr26,cr27,i=0;
1205 static const char *modes[]={ "SPP and Bidirectional (PS/2)",
1206 "EPP and SPP",
1207 "ECP",
1208 "ECP and EPP" };
1209
1210 outb(key,io);
1211 outb(key,io);
1212 outb(1,io);
1213 cr1=inb(io+1);
1214 outb(4,io);
1215 cr4=inb(io+1);
1216 outb(0x0a,io);
1217 cra=inb(io+1);
1218 outb(0x23,io);
1219 cr23=inb(io+1);
1220 outb(0x26,io);
1221 cr26=inb(io+1);
1222 outb(0x27,io);
1223 cr27=inb(io+1);
1224 outb(0xaa,io);
1225
1226 if (verbose_probing) {
1227 printk (KERN_INFO "SMSC 37c669 LPT Config: cr_1=0x%02x, 4=0x%02x, "
1228 "A=0x%2x, 23=0x%02x, 26=0x%02x, 27=0x%02x\n",
1229 cr1,cr4,cra,cr23,cr26,cr27);
1230
1231 /* The documentation calls DMA and IRQ-Lines by letters, so
1232 the board maker can/will wire them
1233 appropriately/randomly... G=reserved H=IDE-irq, */
1234 printk (KERN_INFO "SMSC LPT Config: io=0x%04x, irq=%c, dma=%c, "
1235 "fifo threshold=%d\n", cr23*4,
1236 (cr27 &0x0f) ? 'A'-1+(cr27 &0x0f): '-',
1237 (cr26 &0x0f) ? 'A'-1+(cr26 &0x0f): '-', cra & 0x0f);
1238 printk(KERN_INFO "SMSC LPT Config: enabled=%s power=%s\n",
1239 (cr23*4 >=0x100) ?"yes":"no", (cr1 & 4) ? "yes" : "no");
1240 printk(KERN_INFO "SMSC LPT Config: Port mode=%s, EPP version =%s\n",
1241 (cr1 & 0x08 ) ? "Standard mode only (SPP)" : modes[cr4 & 0x03],
1242 (cr4 & 0x40) ? "1.7" : "1.9");
1243 }
1244
1245 /* Heuristics ! BIOS setup for this mainboard device limits
1246 the choices to standard settings, i.e. io-address and IRQ
1247 are related, however DMA can be 1 or 3, assume DMA_A=DMA1,
1248 DMA_C=DMA3 (this is true e.g. for TYAN 1564D Tomcat IV) */
1249 if(cr23*4 >=0x100) { /* if active */
1250 while((superios[i].io!= 0) && (i<NR_SUPERIOS))
1251 i++;
1252 if(i==NR_SUPERIOS)
1253 printk(KERN_INFO "Super-IO: too many chips!\n");
1254 else {
1255 int d;
1256 switch (cr23*4) {
1257 case 0x3bc:
1258 superios[i].io = 0x3bc;
1259 superios[i].irq = 7;
1260 break;
1261 case 0x378:
1262 superios[i].io = 0x378;
1263 superios[i].irq = 7;
1264 break;
1265 case 0x278:
1266 superios[i].io = 0x278;
1267 superios[i].irq = 5;
1268 }
1269 d=(cr26 &0x0f);
1270 if((d==1) || (d==3))
1271 superios[i].dma= d;
1272 else
1273 superios[i].dma= PARPORT_DMA_NONE;
1274 }
1275 }
1276}
1277
1278
1279static void __devinit show_parconfig_winbond(int io, int key)
1280{
1281 int cr30,cr60,cr61,cr70,cr74,crf0,i=0;
1282 static const char *modes[] = {
1283 "Standard (SPP) and Bidirectional(PS/2)", /* 0 */
1284 "EPP-1.9 and SPP",
1285 "ECP",
1286 "ECP and EPP-1.9",
1287 "Standard (SPP)",
1288 "EPP-1.7 and SPP", /* 5 */
1289 "undefined!",
1290 "ECP and EPP-1.7" };
1291 static char *irqtypes[] = { "pulsed low, high-Z", "follows nACK" };
1292
1293 /* The registers are called compatible-PnP because the
1294 register layout is modelled after ISA-PnP, the access
1295 method is just another ... */
1296 outb(key,io);
1297 outb(key,io);
1298 outb(0x07,io); /* Register 7: Select Logical Device */
1299 outb(0x01,io+1); /* LD1 is Parallel Port */
1300 outb(0x30,io);
1301 cr30=inb(io+1);
1302 outb(0x60,io);
1303 cr60=inb(io+1);
1304 outb(0x61,io);
1305 cr61=inb(io+1);
1306 outb(0x70,io);
1307 cr70=inb(io+1);
1308 outb(0x74,io);
1309 cr74=inb(io+1);
1310 outb(0xf0,io);
1311 crf0=inb(io+1);
1312 outb(0xaa,io);
1313
1314 if (verbose_probing) {
1315 printk(KERN_INFO "Winbond LPT Config: cr_30=%02x 60,61=%02x%02x "
1316 "70=%02x 74=%02x, f0=%02x\n", cr30,cr60,cr61,cr70,cr74,crf0);
1317 printk(KERN_INFO "Winbond LPT Config: active=%s, io=0x%02x%02x irq=%d, ",
1318 (cr30 & 0x01) ? "yes":"no", cr60,cr61,cr70&0x0f );
1319 if ((cr74 & 0x07) > 3)
1320 printk("dma=none\n");
1321 else
1322 printk("dma=%d\n",cr74 & 0x07);
1323 printk(KERN_INFO "Winbond LPT Config: irqtype=%s, ECP fifo threshold=%d\n",
1324 irqtypes[crf0>>7], (crf0>>3)&0x0f);
1325 printk(KERN_INFO "Winbond LPT Config: Port mode=%s\n", modes[crf0 & 0x07]);
1326 }
1327
1328 if(cr30 & 0x01) { /* the settings can be interrogated later ... */
1329 while((superios[i].io!= 0) && (i<NR_SUPERIOS))
1330 i++;
1331 if(i==NR_SUPERIOS)
1332 printk(KERN_INFO "Super-IO: too many chips!\n");
1333 else {
1334 superios[i].io = (cr60<<8)|cr61;
1335 superios[i].irq = cr70&0x0f;
1336 superios[i].dma = (((cr74 & 0x07) > 3) ?
1337 PARPORT_DMA_NONE : (cr74 & 0x07));
1338 }
1339 }
1340}
1341
1342static void __devinit decode_winbond(int efer, int key, int devid, int devrev, int oldid)
1343{
1344 const char *type = "unknown";
1345 int id,progif=2;
1346
1347 if (devid == devrev)
1348 /* simple heuristics, we happened to read some
1349 non-winbond register */
1350 return;
1351
1352 id=(devid<<8) | devrev;
1353
1354 /* Values are from public data sheets pdf files, I can just
1355 confirm 83977TF is correct :-) */
1356 if (id == 0x9771) type="83977F/AF";
1357 else if (id == 0x9773) type="83977TF / SMSC 97w33x/97w34x";
1358 else if (id == 0x9774) type="83977ATF";
1359 else if ((id & ~0x0f) == 0x5270) type="83977CTF / SMSC 97w36x";
1360 else if ((id & ~0x0f) == 0x52f0) type="83977EF / SMSC 97w35x";
1361 else if ((id & ~0x0f) == 0x5210) type="83627";
1362 else if ((id & ~0x0f) == 0x6010) type="83697HF";
1363 else if ((oldid &0x0f ) == 0x0a) { type="83877F"; progif=1;}
1364 else if ((oldid &0x0f ) == 0x0b) { type="83877AF"; progif=1;}
1365 else if ((oldid &0x0f ) == 0x0c) { type="83877TF"; progif=1;}
1366 else if ((oldid &0x0f ) == 0x0d) { type="83877ATF"; progif=1;}
1367 else progif=0;
1368
1369 if (verbose_probing)
1370 printk(KERN_INFO "Winbond chip at EFER=0x%x key=0x%02x "
1371 "devid=%02x devrev=%02x oldid=%02x type=%s\n",
1372 efer, key, devid, devrev, oldid, type);
1373
1374 if (progif == 2)
1375 show_parconfig_winbond(efer,key);
1376}
1377
1378static void __devinit decode_smsc(int efer, int key, int devid, int devrev)
1379{
1380 const char *type = "unknown";
1381 void (*func)(int io, int key);
1382 int id;
1383
1384 if (devid == devrev)
1385 /* simple heuristics, we happened to read some
1386 non-smsc register */
1387 return;
1388
1389 func=NULL;
1390 id=(devid<<8) | devrev;
1391
1392 if (id==0x0302) {type="37c669"; func=show_parconfig_smsc37c669;}
1393 else if (id==0x6582) type="37c665IR";
1394 else if (devid==0x65) type="37c665GT";
1395 else if (devid==0x66) type="37c666GT";
1396
1397 if (verbose_probing)
1398 printk(KERN_INFO "SMSC chip at EFER=0x%x "
1399 "key=0x%02x devid=%02x devrev=%02x type=%s\n",
1400 efer, key, devid, devrev, type);
1401
1402 if (func)
1403 func(efer,key);
1404}
1405
1406
1407static void __devinit winbond_check(int io, int key)
1408{
1409 int devid,devrev,oldid,x_devid,x_devrev,x_oldid;
1410
1411 if (!request_region(io, 3, __FUNCTION__))
1412 return;
1413
1414 /* First probe without key */
1415 outb(0x20,io);
1416 x_devid=inb(io+1);
1417 outb(0x21,io);
1418 x_devrev=inb(io+1);
1419 outb(0x09,io);
1420 x_oldid=inb(io+1);
1421
1422 outb(key,io);
1423 outb(key,io); /* Write Magic Sequence to EFER, extended
1424 funtion enable register */
1425 outb(0x20,io); /* Write EFIR, extended function index register */
1426 devid=inb(io+1); /* Read EFDR, extended function data register */
1427 outb(0x21,io);
1428 devrev=inb(io+1);
1429 outb(0x09,io);
1430 oldid=inb(io+1);
1431 outb(0xaa,io); /* Magic Seal */
1432
1433 if ((x_devid == devid) && (x_devrev == devrev) && (x_oldid == oldid))
1434 goto out; /* protection against false positives */
1435
1436 decode_winbond(io,key,devid,devrev,oldid);
1437out:
1438 release_region(io, 3);
1439}
1440
1441static void __devinit winbond_check2(int io,int key)
1442{
1443 int devid,devrev,oldid,x_devid,x_devrev,x_oldid;
1444
1445 if (!request_region(io, 3, __FUNCTION__))
1446 return;
1447
1448 /* First probe without the key */
1449 outb(0x20,io+2);
1450 x_devid=inb(io+2);
1451 outb(0x21,io+1);
1452 x_devrev=inb(io+2);
1453 outb(0x09,io+1);
1454 x_oldid=inb(io+2);
1455
1456 outb(key,io); /* Write Magic Byte to EFER, extended
1457 funtion enable register */
1458 outb(0x20,io+2); /* Write EFIR, extended function index register */
1459 devid=inb(io+2); /* Read EFDR, extended function data register */
1460 outb(0x21,io+1);
1461 devrev=inb(io+2);
1462 outb(0x09,io+1);
1463 oldid=inb(io+2);
1464 outb(0xaa,io); /* Magic Seal */
1465
1466 if ((x_devid == devid) && (x_devrev == devrev) && (x_oldid == oldid))
1467 goto out; /* protection against false positives */
1468
1469 decode_winbond(io,key,devid,devrev,oldid);
1470out:
1471 release_region(io, 3);
1472}
1473
1474static void __devinit smsc_check(int io, int key)
1475{
1476 int id,rev,oldid,oldrev,x_id,x_rev,x_oldid,x_oldrev;
1477
1478 if (!request_region(io, 3, __FUNCTION__))
1479 return;
1480
1481 /* First probe without the key */
1482 outb(0x0d,io);
1483 x_oldid=inb(io+1);
1484 outb(0x0e,io);
1485 x_oldrev=inb(io+1);
1486 outb(0x20,io);
1487 x_id=inb(io+1);
1488 outb(0x21,io);
1489 x_rev=inb(io+1);
1490
1491 outb(key,io);
1492 outb(key,io); /* Write Magic Sequence to EFER, extended
1493 funtion enable register */
1494 outb(0x0d,io); /* Write EFIR, extended function index register */
1495 oldid=inb(io+1); /* Read EFDR, extended function data register */
1496 outb(0x0e,io);
1497 oldrev=inb(io+1);
1498 outb(0x20,io);
1499 id=inb(io+1);
1500 outb(0x21,io);
1501 rev=inb(io+1);
1502 outb(0xaa,io); /* Magic Seal */
1503
1504 if ((x_id == id) && (x_oldrev == oldrev) &&
1505 (x_oldid == oldid) && (x_rev == rev))
1506 goto out; /* protection against false positives */
1507
1508 decode_smsc(io,key,oldid,oldrev);
1509out:
1510 release_region(io, 3);
1511}
1512
1513
1514static void __devinit detect_and_report_winbond (void)
1515{
1516 if (verbose_probing)
1517 printk(KERN_DEBUG "Winbond Super-IO detection, now testing ports 3F0,370,250,4E,2E ...\n");
1518 winbond_check(0x3f0,0x87);
1519 winbond_check(0x370,0x87);
1520 winbond_check(0x2e ,0x87);
1521 winbond_check(0x4e ,0x87);
1522 winbond_check(0x3f0,0x86);
1523 winbond_check2(0x250,0x88);
1524 winbond_check2(0x250,0x89);
1525}
1526
1527static void __devinit detect_and_report_smsc (void)
1528{
1529 if (verbose_probing)
1530 printk(KERN_DEBUG "SMSC Super-IO detection, now testing Ports 2F0, 370 ...\n");
1531 smsc_check(0x3f0,0x55);
1532 smsc_check(0x370,0x55);
1533 smsc_check(0x3f0,0x44);
1534 smsc_check(0x370,0x44);
1535}
1536#endif /* CONFIG_PARPORT_PC_SUPERIO */
1537
1538static int __devinit get_superio_dma (struct parport *p)
1539{
1540 int i=0;
1541 while( (superios[i].io != p->base) && (i<NR_SUPERIOS))
1542 i++;
1543 if (i!=NR_SUPERIOS)
1544 return superios[i].dma;
1545 return PARPORT_DMA_NONE;
1546}
1547
1548static int __devinit get_superio_irq (struct parport *p)
1549{
1550 int i=0;
1551 while( (superios[i].io != p->base) && (i<NR_SUPERIOS))
1552 i++;
1553 if (i!=NR_SUPERIOS)
1554 return superios[i].irq;
1555 return PARPORT_IRQ_NONE;
1556}
1557
1558
1559/* --- Mode detection ------------------------------------- */
1560
1561/*
1562 * Checks for port existence, all ports support SPP MODE
1563 * Returns:
1564 * 0 : No parallel port at this address
1565 * PARPORT_MODE_PCSPP : SPP port detected
1566 * (if the user specified an ioport himself,
1567 * this shall always be the case!)
1568 *
1569 */
1570static int __devinit parport_SPP_supported(struct parport *pb)
1571{
1572 unsigned char r, w;
1573
1574 /*
1575 * first clear an eventually pending EPP timeout
1576 * I (sailer@ife.ee.ethz.ch) have an SMSC chipset
1577 * that does not even respond to SPP cycles if an EPP
1578 * timeout is pending
1579 */
1580 clear_epp_timeout(pb);
1581
1582 /* Do a simple read-write test to make sure the port exists. */
1583 w = 0xc;
1584 outb (w, CONTROL (pb));
1585
1586 /* Is there a control register that we can read from? Some
1587 * ports don't allow reads, so read_control just returns a
1588 * software copy. Some ports _do_ allow reads, so bypass the
1589 * software copy here. In addition, some bits aren't
1590 * writable. */
1591 r = inb (CONTROL (pb));
1592 if ((r & 0xf) == w) {
1593 w = 0xe;
1594 outb (w, CONTROL (pb));
1595 r = inb (CONTROL (pb));
1596 outb (0xc, CONTROL (pb));
1597 if ((r & 0xf) == w)
1598 return PARPORT_MODE_PCSPP;
1599 }
1600
1601 if (user_specified)
1602 /* That didn't work, but the user thinks there's a
1603 * port here. */
1604 printk (KERN_INFO "parport 0x%lx (WARNING): CTR: "
1605 "wrote 0x%02x, read 0x%02x\n", pb->base, w, r);
1606
1607 /* Try the data register. The data lines aren't tri-stated at
1608 * this stage, so we expect back what we wrote. */
1609 w = 0xaa;
1610 parport_pc_write_data (pb, w);
1611 r = parport_pc_read_data (pb);
1612 if (r == w) {
1613 w = 0x55;
1614 parport_pc_write_data (pb, w);
1615 r = parport_pc_read_data (pb);
1616 if (r == w)
1617 return PARPORT_MODE_PCSPP;
1618 }
1619
1620 if (user_specified) {
1621 /* Didn't work, but the user is convinced this is the
1622 * place. */
1623 printk (KERN_INFO "parport 0x%lx (WARNING): DATA: "
1624 "wrote 0x%02x, read 0x%02x\n", pb->base, w, r);
1625 printk (KERN_INFO "parport 0x%lx: You gave this address, "
1626 "but there is probably no parallel port there!\n",
1627 pb->base);
1628 }
1629
1630 /* It's possible that we can't read the control register or
1631 * the data register. In that case just believe the user. */
1632 if (user_specified)
1633 return PARPORT_MODE_PCSPP;
1634
1635 return 0;
1636}
1637
1638/* Check for ECR
1639 *
1640 * Old style XT ports alias io ports every 0x400, hence accessing ECR
1641 * on these cards actually accesses the CTR.
1642 *
1643 * Modern cards don't do this but reading from ECR will return 0xff
1644 * regardless of what is written here if the card does NOT support
1645 * ECP.
1646 *
1647 * We first check to see if ECR is the same as CTR. If not, the low
1648 * two bits of ECR aren't writable, so we check by writing ECR and
1649 * reading it back to see if it's what we expect.
1650 */
1651static int __devinit parport_ECR_present(struct parport *pb)
1652{
1653 struct parport_pc_private *priv = pb->private_data;
1654 unsigned char r = 0xc;
1655
1656 outb (r, CONTROL (pb));
1657 if ((inb (ECONTROL (pb)) & 0x3) == (r & 0x3)) {
1658 outb (r ^ 0x2, CONTROL (pb)); /* Toggle bit 1 */
1659
1660 r = inb (CONTROL (pb));
1661 if ((inb (ECONTROL (pb)) & 0x2) == (r & 0x2))
1662 goto no_reg; /* Sure that no ECR register exists */
1663 }
1664
1665 if ((inb (ECONTROL (pb)) & 0x3 ) != 0x1)
1666 goto no_reg;
1667
1668 ECR_WRITE (pb, 0x34);
1669 if (inb (ECONTROL (pb)) != 0x35)
1670 goto no_reg;
1671
1672 priv->ecr = 1;
1673 outb (0xc, CONTROL (pb));
1674
1675 /* Go to mode 000 */
1676 frob_set_mode (pb, ECR_SPP);
1677
1678 return 1;
1679
1680 no_reg:
1681 outb (0xc, CONTROL (pb));
1682 return 0;
1683}
1684
1685#ifdef CONFIG_PARPORT_1284
1686/* Detect PS/2 support.
1687 *
1688 * Bit 5 (0x20) sets the PS/2 data direction; setting this high
1689 * allows us to read data from the data lines. In theory we would get back
1690 * 0xff but any peripheral attached to the port may drag some or all of the
1691 * lines down to zero. So if we get back anything that isn't the contents
1692 * of the data register we deem PS/2 support to be present.
1693 *
1694 * Some SPP ports have "half PS/2" ability - you can't turn off the line
1695 * drivers, but an external peripheral with sufficiently beefy drivers of
1696 * its own can overpower them and assert its own levels onto the bus, from
1697 * where they can then be read back as normal. Ports with this property
1698 * and the right type of device attached are likely to fail the SPP test,
1699 * (as they will appear to have stuck bits) and so the fact that they might
1700 * be misdetected here is rather academic.
1701 */
1702
1703static int __devinit parport_PS2_supported(struct parport *pb)
1704{
1705 int ok = 0;
1706
1707 clear_epp_timeout(pb);
1708
1709 /* try to tri-state the buffer */
1710 parport_pc_data_reverse (pb);
1711
1712 parport_pc_write_data(pb, 0x55);
1713 if (parport_pc_read_data(pb) != 0x55) ok++;
1714
1715 parport_pc_write_data(pb, 0xaa);
1716 if (parport_pc_read_data(pb) != 0xaa) ok++;
1717
1718 /* cancel input mode */
1719 parport_pc_data_forward (pb);
1720
1721 if (ok) {
1722 pb->modes |= PARPORT_MODE_TRISTATE;
1723 } else {
1724 struct parport_pc_private *priv = pb->private_data;
1725 priv->ctr_writable &= ~0x20;
1726 }
1727
1728 return ok;
1729}
1730
1731#ifdef CONFIG_PARPORT_PC_FIFO
1732static int __devinit parport_ECP_supported(struct parport *pb)
1733{
1734 int i;
1735 int config, configb;
1736 int pword;
1737 struct parport_pc_private *priv = pb->private_data;
1738 /* Translate ECP intrLine to ISA irq value */
1739 static const int intrline[]= { 0, 7, 9, 10, 11, 14, 15, 5 };
1740
1741 /* If there is no ECR, we have no hope of supporting ECP. */
1742 if (!priv->ecr)
1743 return 0;
1744
1745 /* Find out FIFO depth */
1746 ECR_WRITE (pb, ECR_SPP << 5); /* Reset FIFO */
1747 ECR_WRITE (pb, ECR_TST << 5); /* TEST FIFO */
1748 for (i=0; i < 1024 && !(inb (ECONTROL (pb)) & 0x02); i++)
1749 outb (0xaa, FIFO (pb));
1750
1751 /*
1752 * Using LGS chipset it uses ECR register, but
1753 * it doesn't support ECP or FIFO MODE
1754 */
1755 if (i == 1024) {
1756 ECR_WRITE (pb, ECR_SPP << 5);
1757 return 0;
1758 }
1759
1760 priv->fifo_depth = i;
1761 if (verbose_probing)
1762 printk (KERN_DEBUG "0x%lx: FIFO is %d bytes\n", pb->base, i);
1763
1764 /* Find out writeIntrThreshold */
1765 frob_econtrol (pb, 1<<2, 1<<2);
1766 frob_econtrol (pb, 1<<2, 0);
1767 for (i = 1; i <= priv->fifo_depth; i++) {
1768 inb (FIFO (pb));
1769 udelay (50);
1770 if (inb (ECONTROL (pb)) & (1<<2))
1771 break;
1772 }
1773
1774 if (i <= priv->fifo_depth) {
1775 if (verbose_probing)
1776 printk (KERN_DEBUG "0x%lx: writeIntrThreshold is %d\n",
1777 pb->base, i);
1778 } else
1779 /* Number of bytes we know we can write if we get an
1780 interrupt. */
1781 i = 0;
1782
1783 priv->writeIntrThreshold = i;
1784
1785 /* Find out readIntrThreshold */
1786 frob_set_mode (pb, ECR_PS2); /* Reset FIFO and enable PS2 */
1787 parport_pc_data_reverse (pb); /* Must be in PS2 mode */
1788 frob_set_mode (pb, ECR_TST); /* Test FIFO */
1789 frob_econtrol (pb, 1<<2, 1<<2);
1790 frob_econtrol (pb, 1<<2, 0);
1791 for (i = 1; i <= priv->fifo_depth; i++) {
1792 outb (0xaa, FIFO (pb));
1793 if (inb (ECONTROL (pb)) & (1<<2))
1794 break;
1795 }
1796
1797 if (i <= priv->fifo_depth) {
1798 if (verbose_probing)
1799 printk (KERN_INFO "0x%lx: readIntrThreshold is %d\n",
1800 pb->base, i);
1801 } else
1802 /* Number of bytes we can read if we get an interrupt. */
1803 i = 0;
1804
1805 priv->readIntrThreshold = i;
1806
1807 ECR_WRITE (pb, ECR_SPP << 5); /* Reset FIFO */
1808 ECR_WRITE (pb, 0xf4); /* Configuration mode */
1809 config = inb (CONFIGA (pb));
1810 pword = (config >> 4) & 0x7;
1811 switch (pword) {
1812 case 0:
1813 pword = 2;
1814 printk (KERN_WARNING "0x%lx: Unsupported pword size!\n",
1815 pb->base);
1816 break;
1817 case 2:
1818 pword = 4;
1819 printk (KERN_WARNING "0x%lx: Unsupported pword size!\n",
1820 pb->base);
1821 break;
1822 default:
1823 printk (KERN_WARNING "0x%lx: Unknown implementation ID\n",
1824 pb->base);
1825 /* Assume 1 */
1826 case 1:
1827 pword = 1;
1828 }
1829 priv->pword = pword;
1830
1831 if (verbose_probing) {
1832 printk (KERN_DEBUG "0x%lx: PWord is %d bits\n", pb->base, 8 * pword);
1833
1834 printk (KERN_DEBUG "0x%lx: Interrupts are ISA-%s\n", pb->base,
1835 config & 0x80 ? "Level" : "Pulses");
1836
1837 configb = inb (CONFIGB (pb));
1838 printk (KERN_DEBUG "0x%lx: ECP port cfgA=0x%02x cfgB=0x%02x\n",
1839 pb->base, config, configb);
1840 printk (KERN_DEBUG "0x%lx: ECP settings irq=", pb->base);
1841 if ((configb >>3) & 0x07)
1842 printk("%d",intrline[(configb >>3) & 0x07]);
1843 else
1844 printk("<none or set by other means>");
1845 printk (" dma=");
1846 if( (configb & 0x03 ) == 0x00)
1847 printk("<none or set by other means>\n");
1848 else
1849 printk("%d\n",configb & 0x07);
1850 }
1851
1852 /* Go back to mode 000 */
1853 frob_set_mode (pb, ECR_SPP);
1854
1855 return 1;
1856}
1857#endif
1858
1859static int __devinit parport_ECPPS2_supported(struct parport *pb)
1860{
1861 const struct parport_pc_private *priv = pb->private_data;
1862 int result;
1863 unsigned char oecr;
1864
1865 if (!priv->ecr)
1866 return 0;
1867
1868 oecr = inb (ECONTROL (pb));
1869 ECR_WRITE (pb, ECR_PS2 << 5);
1870 result = parport_PS2_supported(pb);
1871 ECR_WRITE (pb, oecr);
1872 return result;
1873}
1874
1875/* EPP mode detection */
1876
1877static int __devinit parport_EPP_supported(struct parport *pb)
1878{
1879 const struct parport_pc_private *priv = pb->private_data;
1880
1881 /*
1882 * Theory:
1883 * Bit 0 of STR is the EPP timeout bit, this bit is 0
1884 * when EPP is possible and is set high when an EPP timeout
1885 * occurs (EPP uses the HALT line to stop the CPU while it does
1886 * the byte transfer, an EPP timeout occurs if the attached
1887 * device fails to respond after 10 micro seconds).
1888 *
1889 * This bit is cleared by either reading it (National Semi)
1890 * or writing a 1 to the bit (SMC, UMC, WinBond), others ???
1891 * This bit is always high in non EPP modes.
1892 */
1893
1894 /* If EPP timeout bit clear then EPP available */
1895 if (!clear_epp_timeout(pb)) {
1896 return 0; /* No way to clear timeout */
1897 }
1898
1899 /* Check for Intel bug. */
1900 if (priv->ecr) {
1901 unsigned char i;
1902 for (i = 0x00; i < 0x80; i += 0x20) {
1903 ECR_WRITE (pb, i);
1904 if (clear_epp_timeout (pb)) {
1905 /* Phony EPP in ECP. */
1906 return 0;
1907 }
1908 }
1909 }
1910
1911 pb->modes |= PARPORT_MODE_EPP;
1912
1913 /* Set up access functions to use EPP hardware. */
1914 pb->ops->epp_read_data = parport_pc_epp_read_data;
1915 pb->ops->epp_write_data = parport_pc_epp_write_data;
1916 pb->ops->epp_read_addr = parport_pc_epp_read_addr;
1917 pb->ops->epp_write_addr = parport_pc_epp_write_addr;
1918
1919 return 1;
1920}
1921
1922static int __devinit parport_ECPEPP_supported(struct parport *pb)
1923{
1924 struct parport_pc_private *priv = pb->private_data;
1925 int result;
1926 unsigned char oecr;
1927
1928 if (!priv->ecr) {
1929 return 0;
1930 }
1931
1932 oecr = inb (ECONTROL (pb));
1933 /* Search for SMC style EPP+ECP mode */
1934 ECR_WRITE (pb, 0x80);
1935 outb (0x04, CONTROL (pb));
1936 result = parport_EPP_supported(pb);
1937
1938 ECR_WRITE (pb, oecr);
1939
1940 if (result) {
1941 /* Set up access functions to use ECP+EPP hardware. */
1942 pb->ops->epp_read_data = parport_pc_ecpepp_read_data;
1943 pb->ops->epp_write_data = parport_pc_ecpepp_write_data;
1944 pb->ops->epp_read_addr = parport_pc_ecpepp_read_addr;
1945 pb->ops->epp_write_addr = parport_pc_ecpepp_write_addr;
1946 }
1947
1948 return result;
1949}
1950
1951#else /* No IEEE 1284 support */
1952
1953/* Don't bother probing for modes we know we won't use. */
1954static int __devinit parport_PS2_supported(struct parport *pb) { return 0; }
1955#ifdef CONFIG_PARPORT_PC_FIFO
1956static int __devinit parport_ECP_supported(struct parport *pb) { return 0; }
1957#endif
1958static int __devinit parport_EPP_supported(struct parport *pb) { return 0; }
1959static int __devinit parport_ECPEPP_supported(struct parport *pb){return 0;}
1960static int __devinit parport_ECPPS2_supported(struct parport *pb){return 0;}
1961
1962#endif /* No IEEE 1284 support */
1963
1964/* --- IRQ detection -------------------------------------- */
1965
1966/* Only if supports ECP mode */
1967static int __devinit programmable_irq_support(struct parport *pb)
1968{
1969 int irq, intrLine;
1970 unsigned char oecr = inb (ECONTROL (pb));
1971 static const int lookup[8] = {
1972 PARPORT_IRQ_NONE, 7, 9, 10, 11, 14, 15, 5
1973 };
1974
1975 ECR_WRITE (pb, ECR_CNF << 5); /* Configuration MODE */
1976
1977 intrLine = (inb (CONFIGB (pb)) >> 3) & 0x07;
1978 irq = lookup[intrLine];
1979
1980 ECR_WRITE (pb, oecr);
1981 return irq;
1982}
1983
1984static int __devinit irq_probe_ECP(struct parport *pb)
1985{
1986 int i;
1987 unsigned long irqs;
1988
1989 irqs = probe_irq_on();
1990
1991 ECR_WRITE (pb, ECR_SPP << 5); /* Reset FIFO */
1992 ECR_WRITE (pb, (ECR_TST << 5) | 0x04);
1993 ECR_WRITE (pb, ECR_TST << 5);
1994
1995 /* If Full FIFO sure that writeIntrThreshold is generated */
1996 for (i=0; i < 1024 && !(inb (ECONTROL (pb)) & 0x02) ; i++)
1997 outb (0xaa, FIFO (pb));
1998
1999 pb->irq = probe_irq_off(irqs);
2000 ECR_WRITE (pb, ECR_SPP << 5);
2001
2002 if (pb->irq <= 0)
2003 pb->irq = PARPORT_IRQ_NONE;
2004
2005 return pb->irq;
2006}
2007
2008/*
2009 * This detection seems that only works in National Semiconductors
2010 * This doesn't work in SMC, LGS, and Winbond
2011 */
2012static int __devinit irq_probe_EPP(struct parport *pb)
2013{
2014#ifndef ADVANCED_DETECT
2015 return PARPORT_IRQ_NONE;
2016#else
2017 int irqs;
2018 unsigned char oecr;
2019
2020 if (pb->modes & PARPORT_MODE_PCECR)
2021 oecr = inb (ECONTROL (pb));
2022
2023 irqs = probe_irq_on();
2024
2025 if (pb->modes & PARPORT_MODE_PCECR)
2026 frob_econtrol (pb, 0x10, 0x10);
2027
2028 clear_epp_timeout(pb);
2029 parport_pc_frob_control (pb, 0x20, 0x20);
2030 parport_pc_frob_control (pb, 0x10, 0x10);
2031 clear_epp_timeout(pb);
2032
2033 /* Device isn't expecting an EPP read
2034 * and generates an IRQ.
2035 */
2036 parport_pc_read_epp(pb);
2037 udelay(20);
2038
2039 pb->irq = probe_irq_off (irqs);
2040 if (pb->modes & PARPORT_MODE_PCECR)
2041 ECR_WRITE (pb, oecr);
2042 parport_pc_write_control(pb, 0xc);
2043
2044 if (pb->irq <= 0)
2045 pb->irq = PARPORT_IRQ_NONE;
2046
2047 return pb->irq;
2048#endif /* Advanced detection */
2049}
2050
2051static int __devinit irq_probe_SPP(struct parport *pb)
2052{
2053 /* Don't even try to do this. */
2054 return PARPORT_IRQ_NONE;
2055}
2056
2057/* We will attempt to share interrupt requests since other devices
2058 * such as sound cards and network cards seem to like using the
2059 * printer IRQs.
2060 *
2061 * When ECP is available we can autoprobe for IRQs.
2062 * NOTE: If we can autoprobe it, we can register the IRQ.
2063 */
2064static int __devinit parport_irq_probe(struct parport *pb)
2065{
2066 struct parport_pc_private *priv = pb->private_data;
2067
2068 if (priv->ecr) {
2069 pb->irq = programmable_irq_support(pb);
2070
2071 if (pb->irq == PARPORT_IRQ_NONE)
2072 pb->irq = irq_probe_ECP(pb);
2073 }
2074
2075 if ((pb->irq == PARPORT_IRQ_NONE) && priv->ecr &&
2076 (pb->modes & PARPORT_MODE_EPP))
2077 pb->irq = irq_probe_EPP(pb);
2078
2079 clear_epp_timeout(pb);
2080
2081 if (pb->irq == PARPORT_IRQ_NONE && (pb->modes & PARPORT_MODE_EPP))
2082 pb->irq = irq_probe_EPP(pb);
2083
2084 clear_epp_timeout(pb);
2085
2086 if (pb->irq == PARPORT_IRQ_NONE)
2087 pb->irq = irq_probe_SPP(pb);
2088
2089 if (pb->irq == PARPORT_IRQ_NONE)
2090 pb->irq = get_superio_irq(pb);
2091
2092 return pb->irq;
2093}
2094
2095/* --- DMA detection -------------------------------------- */
2096
2097/* Only if chipset conforms to ECP ISA Interface Standard */
2098static int __devinit programmable_dma_support (struct parport *p)
2099{
2100 unsigned char oecr = inb (ECONTROL (p));
2101 int dma;
2102
2103 frob_set_mode (p, ECR_CNF);
2104
2105 dma = inb (CONFIGB(p)) & 0x07;
2106 /* 000: Indicates jumpered 8-bit DMA if read-only.
2107 100: Indicates jumpered 16-bit DMA if read-only. */
2108 if ((dma & 0x03) == 0)
2109 dma = PARPORT_DMA_NONE;
2110
2111 ECR_WRITE (p, oecr);
2112 return dma;
2113}
2114
2115static int __devinit parport_dma_probe (struct parport *p)
2116{
2117 const struct parport_pc_private *priv = p->private_data;
2118 if (priv->ecr)
2119 p->dma = programmable_dma_support(p); /* ask ECP chipset first */
2120 if (p->dma == PARPORT_DMA_NONE) {
2121 /* ask known Super-IO chips proper, although these
2122 claim ECP compatible, some don't report their DMA
2123 conforming to ECP standards */
2124 p->dma = get_superio_dma(p);
2125 }
2126
2127 return p->dma;
2128}
2129
2130/* --- Initialisation code -------------------------------- */
2131
2132static LIST_HEAD(ports_list);
2133static DEFINE_SPINLOCK(ports_lock);
2134
2135struct parport *parport_pc_probe_port (unsigned long int base,
2136 unsigned long int base_hi,
2137 int irq, int dma,
2138 struct pci_dev *dev)
2139{
2140 struct parport_pc_private *priv;
2141 struct parport_operations *ops;
2142 struct parport *p;
2143 int probedirq = PARPORT_IRQ_NONE;
2144 struct resource *base_res;
2145 struct resource *ECR_res = NULL;
2146 struct resource *EPP_res = NULL;
2147
2148 ops = kmalloc(sizeof (struct parport_operations), GFP_KERNEL);
2149 if (!ops)
2150 goto out1;
2151
2152 priv = kmalloc (sizeof (struct parport_pc_private), GFP_KERNEL);
2153 if (!priv)
2154 goto out2;
2155
2156 /* a misnomer, actually - it's allocate and reserve parport number */
2157 p = parport_register_port(base, irq, dma, ops);
2158 if (!p)
2159 goto out3;
2160
2161 base_res = request_region(base, 3, p->name);
2162 if (!base_res)
2163 goto out4;
2164
2165 memcpy(ops, &parport_pc_ops, sizeof (struct parport_operations));
2166 priv->ctr = 0xc;
2167 priv->ctr_writable = ~0x10;
2168 priv->ecr = 0;
2169 priv->fifo_depth = 0;
2170 priv->dma_buf = NULL;
2171 priv->dma_handle = 0;
2172 priv->dev = dev;
2173 INIT_LIST_HEAD(&priv->list);
2174 priv->port = p;
2175 p->base_hi = base_hi;
2176 p->modes = PARPORT_MODE_PCSPP | PARPORT_MODE_SAFEININT;
2177 p->private_data = priv;
2178
2179 if (base_hi) {
2180 ECR_res = request_region(base_hi, 3, p->name);
2181 if (ECR_res)
2182 parport_ECR_present(p);
2183 }
2184
2185 if (base != 0x3bc) {
2186 EPP_res = request_region(base+0x3, 5, p->name);
2187 if (EPP_res)
2188 if (!parport_EPP_supported(p))
2189 parport_ECPEPP_supported(p);
2190 }
2191 if (!parport_SPP_supported (p))
2192 /* No port. */
2193 goto out5;
2194 if (priv->ecr)
2195 parport_ECPPS2_supported(p);
2196 else
2197 parport_PS2_supported(p);
2198
2199 p->size = (p->modes & PARPORT_MODE_EPP)?8:3;
2200
2201 printk(KERN_INFO "%s: PC-style at 0x%lx", p->name, p->base);
2202 if (p->base_hi && priv->ecr)
2203 printk(" (0x%lx)", p->base_hi);
2204 if (p->irq == PARPORT_IRQ_AUTO) {
2205 p->irq = PARPORT_IRQ_NONE;
2206 parport_irq_probe(p);
2207 } else if (p->irq == PARPORT_IRQ_PROBEONLY) {
2208 p->irq = PARPORT_IRQ_NONE;
2209 parport_irq_probe(p);
2210 probedirq = p->irq;
2211 p->irq = PARPORT_IRQ_NONE;
2212 }
2213 if (p->irq != PARPORT_IRQ_NONE) {
2214 printk(", irq %d", p->irq);
2215 priv->ctr_writable |= 0x10;
2216
2217 if (p->dma == PARPORT_DMA_AUTO) {
2218 p->dma = PARPORT_DMA_NONE;
2219 parport_dma_probe(p);
2220 }
2221 }
2222 if (p->dma == PARPORT_DMA_AUTO) /* To use DMA, giving the irq
2223 is mandatory (see above) */
2224 p->dma = PARPORT_DMA_NONE;
2225
2226#ifdef CONFIG_PARPORT_PC_FIFO
2227 if (parport_ECP_supported(p) &&
2228 p->dma != PARPORT_DMA_NOFIFO &&
2229 priv->fifo_depth > 0 && p->irq != PARPORT_IRQ_NONE) {
2230 p->modes |= PARPORT_MODE_ECP | PARPORT_MODE_COMPAT;
2231 p->ops->compat_write_data = parport_pc_compat_write_block_pio;
2232#ifdef CONFIG_PARPORT_1284
2233 p->ops->ecp_write_data = parport_pc_ecp_write_block_pio;
2234 /* currently broken, but working on it.. (FB) */
2235 /* p->ops->ecp_read_data = parport_pc_ecp_read_block_pio; */
2236#endif /* IEEE 1284 support */
2237 if (p->dma != PARPORT_DMA_NONE) {
2238 printk(", dma %d", p->dma);
2239 p->modes |= PARPORT_MODE_DMA;
2240 }
2241 else printk(", using FIFO");
2242 }
2243 else
2244 /* We can't use the DMA channel after all. */
2245 p->dma = PARPORT_DMA_NONE;
2246#endif /* Allowed to use FIFO/DMA */
2247
2248 printk(" [");
2249#define printmode(x) {if(p->modes&PARPORT_MODE_##x){printk("%s%s",f?",":"",#x);f++;}}
2250 {
2251 int f = 0;
2252 printmode(PCSPP);
2253 printmode(TRISTATE);
2254 printmode(COMPAT)
2255 printmode(EPP);
2256 printmode(ECP);
2257 printmode(DMA);
2258 }
2259#undef printmode
2260#ifndef CONFIG_PARPORT_1284
2261 printk ("(,...)");
2262#endif /* CONFIG_PARPORT_1284 */
2263 printk("]\n");
2264 if (probedirq != PARPORT_IRQ_NONE)
2265 printk(KERN_INFO "%s: irq %d detected\n", p->name, probedirq);
2266
2267 /* If No ECP release the ports grabbed above. */
2268 if (ECR_res && (p->modes & PARPORT_MODE_ECP) == 0) {
2269 release_region(base_hi, 3);
2270 ECR_res = NULL;
2271 }
2272 /* Likewise for EEP ports */
2273 if (EPP_res && (p->modes & PARPORT_MODE_EPP) == 0) {
2274 release_region(base+3, 5);
2275 EPP_res = NULL;
2276 }
2277 if (p->irq != PARPORT_IRQ_NONE) {
2278 if (request_irq (p->irq, parport_pc_interrupt,
2279 0, p->name, p)) {
2280 printk (KERN_WARNING "%s: irq %d in use, "
2281 "resorting to polled operation\n",
2282 p->name, p->irq);
2283 p->irq = PARPORT_IRQ_NONE;
2284 p->dma = PARPORT_DMA_NONE;
2285 }
2286
2287#ifdef CONFIG_PARPORT_PC_FIFO
2288 if (p->dma != PARPORT_DMA_NONE) {
2289 if (request_dma (p->dma, p->name)) {
2290 printk (KERN_WARNING "%s: dma %d in use, "
2291 "resorting to PIO operation\n",
2292 p->name, p->dma);
2293 p->dma = PARPORT_DMA_NONE;
2294 } else {
2295 priv->dma_buf =
2296 pci_alloc_consistent(priv->dev,
2297 PAGE_SIZE,
2298 &priv->dma_handle);
2299 if (! priv->dma_buf) {
2300 printk (KERN_WARNING "%s: "
2301 "cannot get buffer for DMA, "
2302 "resorting to PIO operation\n",
2303 p->name);
2304 free_dma(p->dma);
2305 p->dma = PARPORT_DMA_NONE;
2306 }
2307 }
2308 }
2309#endif /* CONFIG_PARPORT_PC_FIFO */
2310 }
2311
2312 /* Done probing. Now put the port into a sensible start-up state. */
2313 if (priv->ecr)
2314 /*
2315 * Put the ECP detected port in PS2 mode.
2316 * Do this also for ports that have ECR but don't do ECP.
2317 */
2318 ECR_WRITE (p, 0x34);
2319
2320 parport_pc_write_data(p, 0);
2321 parport_pc_data_forward (p);
2322
2323 /* Now that we've told the sharing engine about the port, and
2324 found out its characteristics, let the high-level drivers
2325 know about it. */
2326 spin_lock(&ports_lock);
2327 list_add(&priv->list, &ports_list);
2328 spin_unlock(&ports_lock);
2329 parport_announce_port (p);
2330
2331 return p;
2332
2333out5:
2334 if (ECR_res)
2335 release_region(base_hi, 3);
2336 if (EPP_res)
2337 release_region(base+0x3, 5);
2338 release_region(base, 3);
2339out4:
2340 parport_put_port(p);
2341out3:
2342 kfree (priv);
2343out2:
2344 kfree (ops);
2345out1:
2346 return NULL;
2347}
2348
2349EXPORT_SYMBOL (parport_pc_probe_port);
2350
2351void parport_pc_unregister_port (struct parport *p)
2352{
2353 struct parport_pc_private *priv = p->private_data;
2354 struct parport_operations *ops = p->ops;
2355
2356 parport_remove_port(p);
2357 spin_lock(&ports_lock);
2358 list_del_init(&priv->list);
2359 spin_unlock(&ports_lock);
2360 if (p->dma != PARPORT_DMA_NONE)
2361 free_dma(p->dma);
2362 if (p->irq != PARPORT_IRQ_NONE)
2363 free_irq(p->irq, p);
2364 release_region(p->base, 3);
2365 if (p->size > 3)
2366 release_region(p->base + 3, p->size - 3);
2367 if (p->modes & PARPORT_MODE_ECP)
2368 release_region(p->base_hi, 3);
2369#ifdef CONFIG_PARPORT_PC_FIFO
2370 if (priv->dma_buf)
2371 pci_free_consistent(priv->dev, PAGE_SIZE,
2372 priv->dma_buf,
2373 priv->dma_handle);
2374#endif /* CONFIG_PARPORT_PC_FIFO */
2375 kfree (p->private_data);
2376 parport_put_port(p);
2377 kfree (ops); /* hope no-one cached it */
2378}
2379
2380EXPORT_SYMBOL (parport_pc_unregister_port);
2381
2382#ifdef CONFIG_PCI
2383
2384/* ITE support maintained by Rich Liu <richliu@poorman.org> */
2385static int __devinit sio_ite_8872_probe (struct pci_dev *pdev, int autoirq,
2386 int autodma, struct parport_pc_via_data *via)
2387{
2388 short inta_addr[6] = { 0x2A0, 0x2C0, 0x220, 0x240, 0x1E0 };
2389 struct resource *base_res;
2390 u32 ite8872set;
2391 u32 ite8872_lpt, ite8872_lpthi;
2392 u8 ite8872_irq, type;
2393 char *fake_name = "parport probe";
2394 int irq;
2395 int i;
2396
2397 DPRINTK (KERN_DEBUG "sio_ite_8872_probe()\n");
2398
2399 // make sure which one chip
2400 for(i = 0; i < 5; i++) {
2401 base_res = request_region(inta_addr[i], 0x8, fake_name);
2402 if (base_res) {
2403 int test;
2404 pci_write_config_dword (pdev, 0x60,
2405 0xe7000000 | inta_addr[i]);
2406 pci_write_config_dword (pdev, 0x78,
2407 0x00000000 | inta_addr[i]);
2408 test = inb (inta_addr[i]);
2409 if (test != 0xff) break;
2410 release_region(inta_addr[i], 0x8);
2411 }
2412 }
2413 if(i >= 5) {
2414 printk (KERN_INFO "parport_pc: cannot find ITE8872 INTA\n");
2415 return 0;
2416 }
2417
2418 type = inb (inta_addr[i] + 0x18);
2419 type &= 0x0f;
2420
2421 switch (type) {
2422 case 0x2:
2423 printk (KERN_INFO "parport_pc: ITE8871 found (1P)\n");
2424 ite8872set = 0x64200000;
2425 break;
2426 case 0xa:
2427 printk (KERN_INFO "parport_pc: ITE8875 found (1P)\n");
2428 ite8872set = 0x64200000;
2429 break;
2430 case 0xe:
2431 printk (KERN_INFO "parport_pc: ITE8872 found (2S1P)\n");
2432 ite8872set = 0x64e00000;
2433 break;
2434 case 0x6:
2435 printk (KERN_INFO "parport_pc: ITE8873 found (1S)\n");
2436 return 0;
2437 case 0x8:
2438 DPRINTK (KERN_DEBUG "parport_pc: ITE8874 found (2S)\n");
2439 return 0;
2440 default:
2441 printk (KERN_INFO "parport_pc: unknown ITE887x\n");
2442 printk (KERN_INFO "parport_pc: please mail 'lspci -nvv' "
2443 "output to Rich.Liu@ite.com.tw\n");
2444 return 0;
2445 }
2446
2447 pci_read_config_byte (pdev, 0x3c, &ite8872_irq);
2448 pci_read_config_dword (pdev, 0x1c, &ite8872_lpt);
2449 ite8872_lpt &= 0x0000ff00;
2450 pci_read_config_dword (pdev, 0x20, &ite8872_lpthi);
2451 ite8872_lpthi &= 0x0000ff00;
2452 pci_write_config_dword (pdev, 0x6c, 0xe3000000 | ite8872_lpt);
2453 pci_write_config_dword (pdev, 0x70, 0xe3000000 | ite8872_lpthi);
2454 pci_write_config_dword (pdev, 0x80, (ite8872_lpthi<<16) | ite8872_lpt);
2455 // SET SPP&EPP , Parallel Port NO DMA , Enable All Function
2456 // SET Parallel IRQ
2457 pci_write_config_dword (pdev, 0x9c,
2458 ite8872set | (ite8872_irq * 0x11111));
2459
2460 DPRINTK (KERN_DEBUG "ITE887x: The IRQ is %d.\n", ite8872_irq);
2461 DPRINTK (KERN_DEBUG "ITE887x: The PARALLEL I/O port is 0x%x.\n",
2462 ite8872_lpt);
2463 DPRINTK (KERN_DEBUG "ITE887x: The PARALLEL I/O porthi is 0x%x.\n",
2464 ite8872_lpthi);
2465
2466 /* Let the user (or defaults) steer us away from interrupts */
2467 irq = ite8872_irq;
2468 if (autoirq != PARPORT_IRQ_AUTO)
2469 irq = PARPORT_IRQ_NONE;
2470
2471 /*
2472 * Release the resource so that parport_pc_probe_port can get it.
2473 */
2474 release_resource(base_res);
2475 if (parport_pc_probe_port (ite8872_lpt, ite8872_lpthi,
2476 irq, PARPORT_DMA_NONE, NULL)) {
2477 printk (KERN_INFO
2478 "parport_pc: ITE 8872 parallel port: io=0x%X",
2479 ite8872_lpt);
2480 if (irq != PARPORT_IRQ_NONE)
2481 printk (", irq=%d", irq);
2482 printk ("\n");
2483 return 1;
2484 }
2485
2486 return 0;
2487}
2488
2489/* VIA 8231 support by Pavel Fedin <sonic_amiga@rambler.ru>
2490 based on VIA 686a support code by Jeff Garzik <jgarzik@pobox.com> */
2491static int __devinitdata parport_init_mode = 0;
2492
2493/* Data for two known VIA chips */
2494static struct parport_pc_via_data via_686a_data __devinitdata = {
2495 0x51,
2496 0x50,
2497 0x85,
2498 0x02,
2499 0xE2,
2500 0xF0,
2501 0xE6
2502};
2503static struct parport_pc_via_data via_8231_data __devinitdata = {
2504 0x45,
2505 0x44,
2506 0x50,
2507 0x04,
2508 0xF2,
2509 0xFA,
2510 0xF6
2511};
2512
2513static int __devinit sio_via_probe (struct pci_dev *pdev, int autoirq,
2514 int autodma, struct parport_pc_via_data *via)
2515{
2516 u8 tmp, tmp2, siofunc;
2517 u8 ppcontrol = 0;
2518 int dma, irq;
2519 unsigned port1, port2;
2520 unsigned have_epp = 0;
2521
2522 printk(KERN_DEBUG "parport_pc: VIA 686A/8231 detected\n");
2523
2524 switch(parport_init_mode)
2525 {
2526 case 1:
2527 printk(KERN_DEBUG "parport_pc: setting SPP mode\n");
2528 siofunc = VIA_FUNCTION_PARPORT_SPP;
2529 break;
2530 case 2:
2531 printk(KERN_DEBUG "parport_pc: setting PS/2 mode\n");
2532 siofunc = VIA_FUNCTION_PARPORT_SPP;
2533 ppcontrol = VIA_PARPORT_BIDIR;
2534 break;
2535 case 3:
2536 printk(KERN_DEBUG "parport_pc: setting EPP mode\n");
2537 siofunc = VIA_FUNCTION_PARPORT_EPP;
2538 ppcontrol = VIA_PARPORT_BIDIR;
2539 have_epp = 1;
2540 break;
2541 case 4:
2542 printk(KERN_DEBUG "parport_pc: setting ECP mode\n");
2543 siofunc = VIA_FUNCTION_PARPORT_ECP;
2544 ppcontrol = VIA_PARPORT_BIDIR;
2545 break;
2546 case 5:
2547 printk(KERN_DEBUG "parport_pc: setting EPP+ECP mode\n");
2548 siofunc = VIA_FUNCTION_PARPORT_ECP;
2549 ppcontrol = VIA_PARPORT_BIDIR|VIA_PARPORT_ECPEPP;
2550 have_epp = 1;
2551 break;
2552 default:
2553 printk(KERN_DEBUG "parport_pc: probing current configuration\n");
2554 siofunc = VIA_FUNCTION_PROBE;
2555 break;
2556 }
2557 /*
2558 * unlock super i/o configuration
2559 */
2560 pci_read_config_byte(pdev, via->via_pci_superio_config_reg, &tmp);
2561 tmp |= via->via_pci_superio_config_data;
2562 pci_write_config_byte(pdev, via->via_pci_superio_config_reg, tmp);
2563
2564 /* Bits 1-0: Parallel Port Mode / Enable */
2565 outb(via->viacfg_function, VIA_CONFIG_INDEX);
2566 tmp = inb (VIA_CONFIG_DATA);
2567 /* Bit 5: EPP+ECP enable; bit 7: PS/2 bidirectional port enable */
2568 outb(via->viacfg_parport_control, VIA_CONFIG_INDEX);
2569 tmp2 = inb (VIA_CONFIG_DATA);
2570 if (siofunc == VIA_FUNCTION_PROBE)
2571 {
2572 siofunc = tmp & VIA_FUNCTION_PARPORT_DISABLE;
2573 ppcontrol = tmp2;
2574 }
2575 else
2576 {
2577 tmp &= ~VIA_FUNCTION_PARPORT_DISABLE;
2578 tmp |= siofunc;
2579 outb(via->viacfg_function, VIA_CONFIG_INDEX);
2580 outb(tmp, VIA_CONFIG_DATA);
2581 tmp2 &= ~(VIA_PARPORT_BIDIR|VIA_PARPORT_ECPEPP);
2582 tmp2 |= ppcontrol;
2583 outb(via->viacfg_parport_control, VIA_CONFIG_INDEX);
2584 outb(tmp2, VIA_CONFIG_DATA);
2585 }
2586
2587 /* Parallel Port I/O Base Address, bits 9-2 */
2588 outb(via->viacfg_parport_base, VIA_CONFIG_INDEX);
2589 port1 = inb(VIA_CONFIG_DATA) << 2;
2590
2591 printk (KERN_DEBUG "parport_pc: Current parallel port base: 0x%X\n",port1);
2592 if ((port1 == 0x3BC) && have_epp)
2593 {
2594 outb(via->viacfg_parport_base, VIA_CONFIG_INDEX);
2595 outb((0x378 >> 2), VIA_CONFIG_DATA);
2596 printk(KERN_DEBUG "parport_pc: Parallel port base changed to 0x378\n");
2597 port1 = 0x378;
2598 }
2599
2600 /*
2601 * lock super i/o configuration
2602 */
2603 pci_read_config_byte(pdev, via->via_pci_superio_config_reg, &tmp);
2604 tmp &= ~via->via_pci_superio_config_data;
2605 pci_write_config_byte(pdev, via->via_pci_superio_config_reg, tmp);
2606
2607 if (siofunc == VIA_FUNCTION_PARPORT_DISABLE) {
2608 printk(KERN_INFO "parport_pc: VIA parallel port disabled in BIOS\n");
2609 return 0;
2610 }
2611
2612 /* Bits 7-4: PnP Routing for Parallel Port IRQ */
2613 pci_read_config_byte(pdev, via->via_pci_parport_irq_reg, &tmp);
2614 irq = ((tmp & VIA_IRQCONTROL_PARALLEL) >> 4);
2615
2616 if (siofunc == VIA_FUNCTION_PARPORT_ECP)
2617 {
2618 /* Bits 3-2: PnP Routing for Parallel Port DMA */
2619 pci_read_config_byte(pdev, via->via_pci_parport_dma_reg, &tmp);
2620 dma = ((tmp & VIA_DMACONTROL_PARALLEL) >> 2);
2621 }
2622 else
2623 /* if ECP not enabled, DMA is not enabled, assumed bogus 'dma' value */
2624 dma = PARPORT_DMA_NONE;
2625
2626 /* Let the user (or defaults) steer us away from interrupts and DMA */
2627 if (autoirq == PARPORT_IRQ_NONE) {
2628 irq = PARPORT_IRQ_NONE;
2629 dma = PARPORT_DMA_NONE;
2630 }
2631 if (autodma == PARPORT_DMA_NONE)
2632 dma = PARPORT_DMA_NONE;
2633
2634 switch (port1) {
2635 case 0x3bc: port2 = 0x7bc; break;
2636 case 0x378: port2 = 0x778; break;
2637 case 0x278: port2 = 0x678; break;
2638 default:
2639 printk(KERN_INFO "parport_pc: Weird VIA parport base 0x%X, ignoring\n",
2640 port1);
2641 return 0;
2642 }
2643
2644 /* filter bogus IRQs */
2645 switch (irq) {
2646 case 0:
2647 case 2:
2648 case 8:
2649 case 13:
2650 irq = PARPORT_IRQ_NONE;
2651 break;
2652
2653 default: /* do nothing */
2654 break;
2655 }
2656
2657 /* finally, do the probe with values obtained */
2658 if (parport_pc_probe_port (port1, port2, irq, dma, NULL)) {
2659 printk (KERN_INFO
2660 "parport_pc: VIA parallel port: io=0x%X", port1);
2661 if (irq != PARPORT_IRQ_NONE)
2662 printk (", irq=%d", irq);
2663 if (dma != PARPORT_DMA_NONE)
2664 printk (", dma=%d", dma);
2665 printk ("\n");
2666 return 1;
2667 }
2668
2669 printk(KERN_WARNING "parport_pc: Strange, can't probe VIA parallel port: io=0x%X, irq=%d, dma=%d\n",
2670 port1, irq, dma);
2671 return 0;
2672}
2673
2674
2675enum parport_pc_sio_types {
2676 sio_via_686a = 0, /* Via VT82C686A motherboard Super I/O */
2677 sio_via_8231, /* Via VT8231 south bridge integrated Super IO */
2678 sio_ite_8872,
2679 last_sio
2680};
2681
2682/* each element directly indexed from enum list, above */
2683static struct parport_pc_superio {
2684 int (*probe) (struct pci_dev *pdev, int autoirq, int autodma, struct parport_pc_via_data *via);
2685 struct parport_pc_via_data *via;
2686} parport_pc_superio_info[] __devinitdata = {
2687 { sio_via_probe, &via_686a_data, },
2688 { sio_via_probe, &via_8231_data, },
2689 { sio_ite_8872_probe, NULL, },
2690};
2691
2692enum parport_pc_pci_cards {
2693 siig_1p_10x = last_sio,
2694 siig_2p_10x,
2695 siig_1p_20x,
2696 siig_2p_20x,
2697 lava_parallel,
2698 lava_parallel_dual_a,
2699 lava_parallel_dual_b,
2700 boca_ioppar,
2701 plx_9050,
2702 timedia_4078a,
2703 timedia_4079h,
2704 timedia_4085h,
2705 timedia_4088a,
2706 timedia_4089a,
2707 timedia_4095a,
2708 timedia_4096a,
2709 timedia_4078u,
2710 timedia_4079a,
2711 timedia_4085u,
2712 timedia_4079r,
2713 timedia_4079s,
2714 timedia_4079d,
2715 timedia_4079e,
2716 timedia_4079f,
2717 timedia_9079a,
2718 timedia_9079b,
2719 timedia_9079c,
2720 timedia_4006a,
2721 timedia_4014,
2722 timedia_4008a,
2723 timedia_4018,
2724 timedia_9018a,
2725 syba_2p_epp,
2726 syba_1p_ecp,
2727 titan_010l,
2728 titan_1284p2,
2729 avlab_1p,
2730 avlab_2p,
2731 oxsemi_954,
2732 oxsemi_840,
2733 aks_0100,
2734 mobility_pp,
2735 netmos_9705,
2736 netmos_9715,
2737 netmos_9755,
2738 netmos_9805,
2739 netmos_9815,
2740 netmos_9855,
2741};
2742
2743
2744/* each element directly indexed from enum list, above
2745 * (but offset by last_sio) */
2746static struct parport_pc_pci {
2747 int numports;
2748 struct { /* BAR (base address registers) numbers in the config
2749 space header */
2750 int lo;
2751 int hi; /* -1 if not there, >6 for offset-method (max
2752 BAR is 6) */
2753 } addr[4];
2754
2755 /* If set, this is called immediately after pci_enable_device.
2756 * If it returns non-zero, no probing will take place and the
2757 * ports will not be used. */
2758 int (*preinit_hook) (struct pci_dev *pdev, int autoirq, int autodma);
2759
2760 /* If set, this is called after probing for ports. If 'failed'
2761 * is non-zero we couldn't use any of the ports. */
2762 void (*postinit_hook) (struct pci_dev *pdev, int failed);
2763} cards[] __devinitdata = {
2764 /* siig_1p_10x */ { 1, { { 2, 3 }, } },
2765 /* siig_2p_10x */ { 2, { { 2, 3 }, { 4, 5 }, } },
2766 /* siig_1p_20x */ { 1, { { 0, 1 }, } },
2767 /* siig_2p_20x */ { 2, { { 0, 1 }, { 2, 3 }, } },
2768 /* lava_parallel */ { 1, { { 0, -1 }, } },
2769 /* lava_parallel_dual_a */ { 1, { { 0, -1 }, } },
2770 /* lava_parallel_dual_b */ { 1, { { 0, -1 }, } },
2771 /* boca_ioppar */ { 1, { { 0, -1 }, } },
2772 /* plx_9050 */ { 2, { { 4, -1 }, { 5, -1 }, } },
2773 /* timedia_4078a */ { 1, { { 2, -1 }, } },
2774 /* timedia_4079h */ { 1, { { 2, 3 }, } },
2775 /* timedia_4085h */ { 2, { { 2, -1 }, { 4, -1 }, } },
2776 /* timedia_4088a */ { 2, { { 2, 3 }, { 4, 5 }, } },
2777 /* timedia_4089a */ { 2, { { 2, 3 }, { 4, 5 }, } },
2778 /* timedia_4095a */ { 2, { { 2, 3 }, { 4, 5 }, } },
2779 /* timedia_4096a */ { 2, { { 2, 3 }, { 4, 5 }, } },
2780 /* timedia_4078u */ { 1, { { 2, -1 }, } },
2781 /* timedia_4079a */ { 1, { { 2, 3 }, } },
2782 /* timedia_4085u */ { 2, { { 2, -1 }, { 4, -1 }, } },
2783 /* timedia_4079r */ { 1, { { 2, 3 }, } },
2784 /* timedia_4079s */ { 1, { { 2, 3 }, } },
2785 /* timedia_4079d */ { 1, { { 2, 3 }, } },
2786 /* timedia_4079e */ { 1, { { 2, 3 }, } },
2787 /* timedia_4079f */ { 1, { { 2, 3 }, } },
2788 /* timedia_9079a */ { 1, { { 2, 3 }, } },
2789 /* timedia_9079b */ { 1, { { 2, 3 }, } },
2790 /* timedia_9079c */ { 1, { { 2, 3 }, } },
2791 /* timedia_4006a */ { 1, { { 0, -1 }, } },
2792 /* timedia_4014 */ { 2, { { 0, -1 }, { 2, -1 }, } },
2793 /* timedia_4008a */ { 1, { { 0, 1 }, } },
2794 /* timedia_4018 */ { 2, { { 0, 1 }, { 2, 3 }, } },
2795 /* timedia_9018a */ { 2, { { 0, 1 }, { 2, 3 }, } },
2796 /* SYBA uses fixed offsets in
2797 a 1K io window */
2798 /* syba_2p_epp AP138B */ { 2, { { 0, 0x078 }, { 0, 0x178 }, } },
2799 /* syba_1p_ecp W83787 */ { 1, { { 0, 0x078 }, } },
2800 /* titan_010l */ { 1, { { 3, -1 }, } },
2801 /* titan_1284p2 */ { 2, { { 0, 1 }, { 2, 3 }, } },
2802 /* avlab_1p */ { 1, { { 0, 1}, } },
2803 /* avlab_2p */ { 2, { { 0, 1}, { 2, 3 },} },
2804 /* The Oxford Semi cards are unusual: 954 doesn't support ECP,
2805 * and 840 locks up if you write 1 to bit 2! */
2806 /* oxsemi_954 */ { 1, { { 0, -1 }, } },
2807 /* oxsemi_840 */ { 1, { { 0, -1 }, } },
2808 /* aks_0100 */ { 1, { { 0, -1 }, } },
2809 /* mobility_pp */ { 1, { { 0, 1 }, } },
2810 /* netmos_9705 */ { 1, { { 0, -1 }, } }, /* untested */
2811 /* netmos_9715 */ { 2, { { 0, 1 }, { 2, 3 },} }, /* untested */
2812 /* netmos_9755 */ { 2, { { 0, 1 }, { 2, 3 },} }, /* untested */
2813 /* netmos_9805 */ { 1, { { 0, -1 }, } }, /* untested */
2814 /* netmos_9815 */ { 2, { { 0, -1 }, { 2, -1 }, } }, /* untested */
2815 /* netmos_9855 */ { 2, { { 0, -1 }, { 2, -1 }, } }, /* untested */
2816};
2817
2818static struct pci_device_id parport_pc_pci_tbl[] = {
2819 /* Super-IO onboard chips */
2820 { 0x1106, 0x0686, PCI_ANY_ID, PCI_ANY_ID, 0, 0, sio_via_686a },
2821 { 0x1106, 0x8231, PCI_ANY_ID, PCI_ANY_ID, 0, 0, sio_via_8231 },
2822 { PCI_VENDOR_ID_ITE, PCI_DEVICE_ID_ITE_8872,
2823 PCI_ANY_ID, PCI_ANY_ID, 0, 0, sio_ite_8872 },
2824
2825 /* PCI cards */
2826 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_1P_10x,
2827 PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_1p_10x },
2828 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_2P_10x,
2829 PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_2p_10x },
2830 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_1P_20x,
2831 PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_1p_20x },
2832 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_2P_20x,
2833 PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_2p_20x },
2834 { PCI_VENDOR_ID_LAVA, PCI_DEVICE_ID_LAVA_PARALLEL,
2835 PCI_ANY_ID, PCI_ANY_ID, 0, 0, lava_parallel },
2836 { PCI_VENDOR_ID_LAVA, PCI_DEVICE_ID_LAVA_DUAL_PAR_A,
2837 PCI_ANY_ID, PCI_ANY_ID, 0, 0, lava_parallel_dual_a },
2838 { PCI_VENDOR_ID_LAVA, PCI_DEVICE_ID_LAVA_DUAL_PAR_B,
2839 PCI_ANY_ID, PCI_ANY_ID, 0, 0, lava_parallel_dual_b },
2840 { PCI_VENDOR_ID_LAVA, PCI_DEVICE_ID_LAVA_BOCA_IOPPAR,
2841 PCI_ANY_ID, PCI_ANY_ID, 0, 0, boca_ioppar },
2842 { PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_9050,
2843 PCI_SUBVENDOR_ID_EXSYS, PCI_SUBDEVICE_ID_EXSYS_4014, 0,0, plx_9050 },
2844 /* PCI_VENDOR_ID_TIMEDIA/SUNIX has many differing cards ...*/
2845 { 0x1409, 0x7168, 0x1409, 0x4078, 0, 0, timedia_4078a },
2846 { 0x1409, 0x7168, 0x1409, 0x4079, 0, 0, timedia_4079h },
2847 { 0x1409, 0x7168, 0x1409, 0x4085, 0, 0, timedia_4085h },
2848 { 0x1409, 0x7168, 0x1409, 0x4088, 0, 0, timedia_4088a },
2849 { 0x1409, 0x7168, 0x1409, 0x4089, 0, 0, timedia_4089a },
2850 { 0x1409, 0x7168, 0x1409, 0x4095, 0, 0, timedia_4095a },
2851 { 0x1409, 0x7168, 0x1409, 0x4096, 0, 0, timedia_4096a },
2852 { 0x1409, 0x7168, 0x1409, 0x5078, 0, 0, timedia_4078u },
2853 { 0x1409, 0x7168, 0x1409, 0x5079, 0, 0, timedia_4079a },
2854 { 0x1409, 0x7168, 0x1409, 0x5085, 0, 0, timedia_4085u },
2855 { 0x1409, 0x7168, 0x1409, 0x6079, 0, 0, timedia_4079r },
2856 { 0x1409, 0x7168, 0x1409, 0x7079, 0, 0, timedia_4079s },
2857 { 0x1409, 0x7168, 0x1409, 0x8079, 0, 0, timedia_4079d },
2858 { 0x1409, 0x7168, 0x1409, 0x9079, 0, 0, timedia_4079e },
2859 { 0x1409, 0x7168, 0x1409, 0xa079, 0, 0, timedia_4079f },
2860 { 0x1409, 0x7168, 0x1409, 0xb079, 0, 0, timedia_9079a },
2861 { 0x1409, 0x7168, 0x1409, 0xc079, 0, 0, timedia_9079b },
2862 { 0x1409, 0x7168, 0x1409, 0xd079, 0, 0, timedia_9079c },
2863 { 0x1409, 0x7268, 0x1409, 0x0101, 0, 0, timedia_4006a },
2864 { 0x1409, 0x7268, 0x1409, 0x0102, 0, 0, timedia_4014 },
2865 { 0x1409, 0x7268, 0x1409, 0x0103, 0, 0, timedia_4008a },
2866 { 0x1409, 0x7268, 0x1409, 0x0104, 0, 0, timedia_4018 },
2867 { 0x1409, 0x7268, 0x1409, 0x9018, 0, 0, timedia_9018a },
2868 { 0x14f2, 0x0121, PCI_ANY_ID, PCI_ANY_ID, 0, 0, mobility_pp },
2869 { PCI_VENDOR_ID_SYBA, PCI_DEVICE_ID_SYBA_2P_EPP,
2870 PCI_ANY_ID, PCI_ANY_ID, 0, 0, syba_2p_epp },
2871 { PCI_VENDOR_ID_SYBA, PCI_DEVICE_ID_SYBA_1P_ECP,
2872 PCI_ANY_ID, PCI_ANY_ID, 0, 0, syba_1p_ecp },
2873 { PCI_VENDOR_ID_TITAN, PCI_DEVICE_ID_TITAN_010L,
2874 PCI_ANY_ID, PCI_ANY_ID, 0, 0, titan_010l },
2875 { 0x9710, 0x9815, 0x1000, 0x0020, 0, 0, titan_1284p2 },
2876 /* PCI_VENDOR_ID_AVLAB/Intek21 has another bunch of cards ...*/
2877 { 0x14db, 0x2120, PCI_ANY_ID, PCI_ANY_ID, 0, 0, avlab_1p}, /* AFAVLAB_TK9902 */
2878 { 0x14db, 0x2121, PCI_ANY_ID, PCI_ANY_ID, 0, 0, avlab_2p},
2879 { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_16PCI954PP,
2880 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_954 },
2881 { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_12PCI840,
2882 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_840 },
2883 { PCI_VENDOR_ID_AKS, PCI_DEVICE_ID_AKS_ALADDINCARD,
2884 PCI_ANY_ID, PCI_ANY_ID, 0, 0, aks_0100 },
2885 /* NetMos communication controllers */
2886 { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9705,
2887 PCI_ANY_ID, PCI_ANY_ID, 0, 0, netmos_9705 },
2888 { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9715,
2889 PCI_ANY_ID, PCI_ANY_ID, 0, 0, netmos_9715 },
2890 { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9755,
2891 PCI_ANY_ID, PCI_ANY_ID, 0, 0, netmos_9755 },
2892 { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9805,
2893 PCI_ANY_ID, PCI_ANY_ID, 0, 0, netmos_9805 },
2894 { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9815,
2895 PCI_ANY_ID, PCI_ANY_ID, 0, 0, netmos_9815 },
2896 { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9855,
2897 PCI_ANY_ID, PCI_ANY_ID, 0, 0, netmos_9855 },
2898 { 0, } /* terminate list */
2899};
2900MODULE_DEVICE_TABLE(pci,parport_pc_pci_tbl);
2901
2902struct pci_parport_data {
2903 int num;
2904 struct parport *ports[2];
2905};
2906
2907static int parport_pc_pci_probe (struct pci_dev *dev,
2908 const struct pci_device_id *id)
2909{
2910 int err, count, n, i = id->driver_data;
2911 struct pci_parport_data *data;
2912
2913 if (i < last_sio)
2914 /* This is an onboard Super-IO and has already been probed */
2915 return 0;
2916
2917 /* This is a PCI card */
2918 i -= last_sio;
2919 count = 0;
2920 if ((err = pci_enable_device (dev)) != 0)
2921 return err;
2922
2923 data = kmalloc(sizeof(struct pci_parport_data), GFP_KERNEL);
2924 if (!data)
2925 return -ENOMEM;
2926
2927 if (cards[i].preinit_hook &&
2928 cards[i].preinit_hook (dev, PARPORT_IRQ_NONE, PARPORT_DMA_NONE)) {
2929 kfree(data);
2930 return -ENODEV;
2931 }
2932
2933 for (n = 0; n < cards[i].numports; n++) {
2934 int lo = cards[i].addr[n].lo;
2935 int hi = cards[i].addr[n].hi;
2936 unsigned long io_lo, io_hi;
2937 io_lo = pci_resource_start (dev, lo);
2938 io_hi = 0;
2939 if ((hi >= 0) && (hi <= 6))
2940 io_hi = pci_resource_start (dev, hi);
2941 else if (hi > 6)
2942 io_lo += hi; /* Reinterpret the meaning of
2943 "hi" as an offset (see SYBA
2944 def.) */
2945 /* TODO: test if sharing interrupts works */
2946 printk (KERN_DEBUG "PCI parallel port detected: %04x:%04x, "
2947 "I/O at %#lx(%#lx)\n",
2948 parport_pc_pci_tbl[i + last_sio].vendor,
2949 parport_pc_pci_tbl[i + last_sio].device, io_lo, io_hi);
2950 data->ports[count] =
2951 parport_pc_probe_port (io_lo, io_hi, PARPORT_IRQ_NONE,
2952 PARPORT_DMA_NONE, dev);
2953 if (data->ports[count])
2954 count++;
2955 }
2956
2957 data->num = count;
2958
2959 if (cards[i].postinit_hook)
2960 cards[i].postinit_hook (dev, count == 0);
2961
2962 if (count) {
2963 pci_set_drvdata(dev, data);
2964 return 0;
2965 }
2966
2967 kfree(data);
2968
2969 return -ENODEV;
2970}
2971
2972static void __devexit parport_pc_pci_remove(struct pci_dev *dev)
2973{
2974 struct pci_parport_data *data = pci_get_drvdata(dev);
2975 int i;
2976
2977 pci_set_drvdata(dev, NULL);
2978
2979 if (data) {
2980 for (i = data->num - 1; i >= 0; i--)
2981 parport_pc_unregister_port(data->ports[i]);
2982
2983 kfree(data);
2984 }
2985}
2986
2987static struct pci_driver parport_pc_pci_driver = {
2988 .name = "parport_pc",
2989 .id_table = parport_pc_pci_tbl,
2990 .probe = parport_pc_pci_probe,
2991 .remove = __devexit_p(parport_pc_pci_remove),
2992};
2993
2994static int __init parport_pc_init_superio (int autoirq, int autodma)
2995{
2996 const struct pci_device_id *id;
2997 struct pci_dev *pdev = NULL;
2998 int ret = 0;
2999
3000 while ((pdev = pci_find_device(PCI_ANY_ID, PCI_ANY_ID, pdev)) != NULL) {
3001 id = pci_match_device (parport_pc_pci_tbl, pdev);
3002 if (id == NULL || id->driver_data >= last_sio)
3003 continue;
3004
3005 if (parport_pc_superio_info[id->driver_data].probe
3006 (pdev, autoirq, autodma,parport_pc_superio_info[id->driver_data].via)) {
3007 ret++;
3008 }
3009 }
3010
3011 return ret; /* number of devices found */
3012}
3013#else
3014static struct pci_driver parport_pc_pci_driver;
3015static int __init parport_pc_init_superio(int autoirq, int autodma) {return 0;}
3016#endif /* CONFIG_PCI */
3017
3018
3019static const struct pnp_device_id parport_pc_pnp_tbl[] = {
3020 /* Standard LPT Printer Port */
3021 {.id = "PNP0400", .driver_data = 0},
3022 /* ECP Printer Port */
3023 {.id = "PNP0401", .driver_data = 0},
3024 { }
3025};
3026
3027MODULE_DEVICE_TABLE(pnp,parport_pc_pnp_tbl);
3028
3029static int parport_pc_pnp_probe(struct pnp_dev *dev, const struct pnp_device_id *id)
3030{
3031 struct parport *pdata;
3032 unsigned long io_lo, io_hi;
3033 int dma, irq;
3034
3035 if (pnp_port_valid(dev,0) &&
3036 !(pnp_port_flags(dev,0) & IORESOURCE_DISABLED)) {
3037 io_lo = pnp_port_start(dev,0);
3038 } else
3039 return -EINVAL;
3040
3041 if (pnp_port_valid(dev,1) &&
3042 !(pnp_port_flags(dev,1) & IORESOURCE_DISABLED)) {
3043 io_hi = pnp_port_start(dev,1);
3044 } else
3045 io_hi = 0;
3046
3047 if (pnp_irq_valid(dev,0) &&
3048 !(pnp_irq_flags(dev,0) & IORESOURCE_DISABLED)) {
3049 irq = pnp_irq(dev,0);
3050 } else
3051 irq = PARPORT_IRQ_NONE;
3052
3053 if (pnp_dma_valid(dev,0) &&
3054 !(pnp_dma_flags(dev,0) & IORESOURCE_DISABLED)) {
3055 dma = pnp_dma(dev,0);
3056 } else
3057 dma = PARPORT_DMA_NONE;
3058
3059 printk(KERN_INFO "parport: PnPBIOS parport detected.\n");
3060 if (!(pdata = parport_pc_probe_port (io_lo, io_hi, irq, dma, NULL)))
3061 return -ENODEV;
3062
3063 pnp_set_drvdata(dev,pdata);
3064 return 0;
3065}
3066
3067static void parport_pc_pnp_remove(struct pnp_dev *dev)
3068{
3069 struct parport *pdata = (struct parport *)pnp_get_drvdata(dev);
3070 if (!pdata)
3071 return;
3072
3073 parport_pc_unregister_port(pdata);
3074}
3075
3076/* we only need the pnp layer to activate the device, at least for now */
3077static struct pnp_driver parport_pc_pnp_driver = {
3078 .name = "parport_pc",
3079 .id_table = parport_pc_pnp_tbl,
3080 .probe = parport_pc_pnp_probe,
3081 .remove = parport_pc_pnp_remove,
3082};
3083
3084
3085/* This is called by parport_pc_find_nonpci_ports (in asm/parport.h) */
3086static int __devinit __attribute__((unused))
3087parport_pc_find_isa_ports (int autoirq, int autodma)
3088{
3089 int count = 0;
3090
3091 if (parport_pc_probe_port(0x3bc, 0x7bc, autoirq, autodma, NULL))
3092 count++;
3093 if (parport_pc_probe_port(0x378, 0x778, autoirq, autodma, NULL))
3094 count++;
3095 if (parport_pc_probe_port(0x278, 0x678, autoirq, autodma, NULL))
3096 count++;
3097
3098 return count;
3099}
3100
3101/* This function is called by parport_pc_init if the user didn't
3102 * specify any ports to probe. Its job is to find some ports. Order
3103 * is important here -- we want ISA ports to be registered first,
3104 * followed by PCI cards (for least surprise), but before that we want
3105 * to do chipset-specific tests for some onboard ports that we know
3106 * about.
3107 *
3108 * autoirq is PARPORT_IRQ_NONE, PARPORT_IRQ_AUTO, or PARPORT_IRQ_PROBEONLY
3109 * autodma is PARPORT_DMA_NONE or PARPORT_DMA_AUTO
3110 */
3111static int __init parport_pc_find_ports (int autoirq, int autodma)
3112{
3113 int count = 0, r;
3114
3115#ifdef CONFIG_PARPORT_PC_SUPERIO
3116 detect_and_report_winbond ();
3117 detect_and_report_smsc ();
3118#endif
3119
3120 /* Onboard SuperIO chipsets that show themselves on the PCI bus. */
3121 count += parport_pc_init_superio (autoirq, autodma);
3122
3123 /* PnP ports, skip detection if SuperIO already found them */
3124 if (!count) {
3125 r = pnp_register_driver (&parport_pc_pnp_driver);
3126 if (r >= 0) {
3127 pnp_registered_parport = 1;
3128 count += r;
3129 }
3130 }
3131
3132 /* ISA ports and whatever (see asm/parport.h). */
3133 count += parport_pc_find_nonpci_ports (autoirq, autodma);
3134
3135 r = pci_register_driver (&parport_pc_pci_driver);
3136 if (r)
3137 return r;
3138 pci_registered_parport = 1;
3139 count += 1;
3140
3141 return count;
3142}
3143
3144/*
3145 * Piles of crap below pretend to be a parser for module and kernel
3146 * parameters. Say "thank you" to whoever had come up with that
3147 * syntax and keep in mind that code below is a cleaned up version.
3148 */
3149
3150static int __initdata io[PARPORT_PC_MAX_PORTS+1] = { [0 ... PARPORT_PC_MAX_PORTS] = 0 };
3151static int __initdata io_hi[PARPORT_PC_MAX_PORTS+1] =
3152 { [0 ... PARPORT_PC_MAX_PORTS] = PARPORT_IOHI_AUTO };
3153static int __initdata dmaval[PARPORT_PC_MAX_PORTS] = { [0 ... PARPORT_PC_MAX_PORTS-1] = PARPORT_DMA_NONE };
3154static int __initdata irqval[PARPORT_PC_MAX_PORTS] = { [0 ... PARPORT_PC_MAX_PORTS-1] = PARPORT_IRQ_PROBEONLY };
3155
3156static int __init parport_parse_param(const char *s, int *val,
3157 int automatic, int none, int nofifo)
3158{
3159 if (!s)
3160 return 0;
3161 if (!strncmp(s, "auto", 4))
3162 *val = automatic;
3163 else if (!strncmp(s, "none", 4))
3164 *val = none;
3165 else if (nofifo && !strncmp(s, "nofifo", 4))
3166 *val = nofifo;
3167 else {
3168 char *ep;
3169 unsigned long r = simple_strtoul(s, &ep, 0);
3170 if (ep != s)
3171 *val = r;
3172 else {
3173 printk(KERN_ERR "parport: bad specifier `%s'\n", s);
3174 return -1;
3175 }
3176 }
3177 return 0;
3178}
3179
3180static int __init parport_parse_irq(const char *irqstr, int *val)
3181{
3182 return parport_parse_param(irqstr, val, PARPORT_IRQ_AUTO,
3183 PARPORT_IRQ_NONE, 0);
3184}
3185
3186static int __init parport_parse_dma(const char *dmastr, int *val)
3187{
3188 return parport_parse_param(dmastr, val, PARPORT_DMA_AUTO,
3189 PARPORT_DMA_NONE, PARPORT_DMA_NOFIFO);
3190}
3191
3192#ifdef CONFIG_PCI
3193static int __init parport_init_mode_setup(char *str)
3194{
3195 printk(KERN_DEBUG "parport_pc.c: Specified parameter parport_init_mode=%s\n", str);
3196
3197 if (!strcmp (str, "spp"))
3198 parport_init_mode=1;
3199 if (!strcmp (str, "ps2"))
3200 parport_init_mode=2;
3201 if (!strcmp (str, "epp"))
3202 parport_init_mode=3;
3203 if (!strcmp (str, "ecp"))
3204 parport_init_mode=4;
3205 if (!strcmp (str, "ecpepp"))
3206 parport_init_mode=5;
3207 return 1;
3208}
3209#endif
3210
3211#ifdef MODULE
3212static const char *irq[PARPORT_PC_MAX_PORTS];
3213static const char *dma[PARPORT_PC_MAX_PORTS];
3214
3215MODULE_PARM_DESC(io, "Base I/O address (SPP regs)");
3216module_param_array(io, int, NULL, 0);
3217MODULE_PARM_DESC(io_hi, "Base I/O address (ECR)");
3218module_param_array(io_hi, int, NULL, 0);
3219MODULE_PARM_DESC(irq, "IRQ line");
3220module_param_array(irq, charp, NULL, 0);
3221MODULE_PARM_DESC(dma, "DMA channel");
3222module_param_array(dma, charp, NULL, 0);
3223#if defined(CONFIG_PARPORT_PC_SUPERIO) || \
3224 (defined(CONFIG_PARPORT_1284) && defined(CONFIG_PARPORT_PC_FIFO))
3225MODULE_PARM_DESC(verbose_probing, "Log chit-chat during initialisation");
3226module_param(verbose_probing, int, 0644);
3227#endif
3228#ifdef CONFIG_PCI
3229static char *init_mode;
3230MODULE_PARM_DESC(init_mode, "Initialise mode for VIA VT8231 port (spp, ps2, epp, ecp or ecpepp)");
3231module_param(init_mode, charp, 0);
3232#endif
3233
3234static int __init parse_parport_params(void)
3235{
3236 unsigned int i;
3237 int val;
3238
3239#ifdef CONFIG_PCI
3240 if (init_mode)
3241 parport_init_mode_setup(init_mode);
3242#endif
3243
3244 for (i = 0; i < PARPORT_PC_MAX_PORTS && io[i]; i++) {
3245 if (parport_parse_irq(irq[i], &val))
3246 return 1;
3247 irqval[i] = val;
3248 if (parport_parse_dma(dma[i], &val))
3249 return 1;
3250 dmaval[i] = val;
3251 }
3252 if (!io[0]) {
3253 /* The user can make us use any IRQs or DMAs we find. */
3254 if (irq[0] && !parport_parse_irq(irq[0], &val))
3255 switch (val) {
3256 case PARPORT_IRQ_NONE:
3257 case PARPORT_IRQ_AUTO:
3258 irqval[0] = val;
3259 break;
3260 default:
3261 printk (KERN_WARNING
3262 "parport_pc: irq specified "
3263 "without base address. Use 'io=' "
3264 "to specify one\n");
3265 }
3266
3267 if (dma[0] && !parport_parse_dma(dma[0], &val))
3268 switch (val) {
3269 case PARPORT_DMA_NONE:
3270 case PARPORT_DMA_AUTO:
3271 dmaval[0] = val;
3272 break;
3273 default:
3274 printk (KERN_WARNING
3275 "parport_pc: dma specified "
3276 "without base address. Use 'io=' "
3277 "to specify one\n");
3278 }
3279 }
3280 return 0;
3281}
3282
3283#else
3284
3285static int parport_setup_ptr __initdata = 0;
3286
3287/*
3288 * Acceptable parameters:
3289 *
3290 * parport=0
3291 * parport=auto
3292 * parport=0xBASE[,IRQ[,DMA]]
3293 *
3294 * IRQ/DMA may be numeric or 'auto' or 'none'
3295 */
3296static int __init parport_setup (char *str)
3297{
3298 char *endptr;
3299 char *sep;
3300 int val;
3301
3302 if (!str || !*str || (*str == '0' && !*(str+1))) {
3303 /* Disable parport if "parport=0" in cmdline */
3304 io[0] = PARPORT_DISABLE;
3305 return 1;
3306 }
3307
3308 if (!strncmp (str, "auto", 4)) {
3309 irqval[0] = PARPORT_IRQ_AUTO;
3310 dmaval[0] = PARPORT_DMA_AUTO;
3311 return 1;
3312 }
3313
3314 val = simple_strtoul (str, &endptr, 0);
3315 if (endptr == str) {
3316 printk (KERN_WARNING "parport=%s not understood\n", str);
3317 return 1;
3318 }
3319
3320 if (parport_setup_ptr == PARPORT_PC_MAX_PORTS) {
3321 printk(KERN_ERR "parport=%s ignored, too many ports\n", str);
3322 return 1;
3323 }
3324
3325 io[parport_setup_ptr] = val;
3326 irqval[parport_setup_ptr] = PARPORT_IRQ_NONE;
3327 dmaval[parport_setup_ptr] = PARPORT_DMA_NONE;
3328
3329 sep = strchr(str, ',');
3330 if (sep++) {
3331 if (parport_parse_irq(sep, &val))
3332 return 1;
3333 irqval[parport_setup_ptr] = val;
3334 sep = strchr(sep, ',');
3335 if (sep++) {
3336 if (parport_parse_dma(sep, &val))
3337 return 1;
3338 dmaval[parport_setup_ptr] = val;
3339 }
3340 }
3341 parport_setup_ptr++;
3342 return 1;
3343}
3344
3345static int __init parse_parport_params(void)
3346{
3347 return io[0] == PARPORT_DISABLE;
3348}
3349
3350__setup ("parport=", parport_setup);
3351
3352/*
3353 * Acceptable parameters:
3354 *
3355 * parport_init_mode=[spp|ps2|epp|ecp|ecpepp]
3356 */
3357#ifdef CONFIG_PCI
3358__setup("parport_init_mode=",parport_init_mode_setup);
3359#endif
3360#endif
3361
3362/* "Parser" ends here */
3363
3364static int __init parport_pc_init(void)
3365{
3366 int count = 0;
3367
3368 if (parse_parport_params())
3369 return -EINVAL;
3370
3371 if (io[0]) {
3372 int i;
3373 /* Only probe the ports we were given. */
3374 user_specified = 1;
3375 for (i = 0; i < PARPORT_PC_MAX_PORTS; i++) {
3376 if (!io[i])
3377 break;
3378 if ((io_hi[i]) == PARPORT_IOHI_AUTO)
3379 io_hi[i] = 0x400 + io[i];
3380 if (parport_pc_probe_port(io[i], io_hi[i],
3381 irqval[i], dmaval[i], NULL))
3382 count++;
3383 }
3384 } else
3385 count += parport_pc_find_ports (irqval[0], dmaval[0]);
3386
3387 return 0;
3388}
3389
3390static void __exit parport_pc_exit(void)
3391{
3392 if (pci_registered_parport)
3393 pci_unregister_driver (&parport_pc_pci_driver);
3394 if (pnp_registered_parport)
3395 pnp_unregister_driver (&parport_pc_pnp_driver);
3396
3397 spin_lock(&ports_lock);
3398 while (!list_empty(&ports_list)) {
3399 struct parport_pc_private *priv;
3400 struct parport *port;
3401 priv = list_entry(ports_list.next,
3402 struct parport_pc_private, list);
3403 port = priv->port;
3404 spin_unlock(&ports_lock);
3405 parport_pc_unregister_port(port);
3406 spin_lock(&ports_lock);
3407 }
3408 spin_unlock(&ports_lock);
3409}
3410
3411MODULE_AUTHOR("Phil Blundell, Tim Waugh, others");
3412MODULE_DESCRIPTION("PC-style parallel port driver");
3413MODULE_LICENSE("GPL");
3414module_init(parport_pc_init)
3415module_exit(parport_pc_exit)
diff --git a/drivers/parport/parport_serial.c b/drivers/parport/parport_serial.c
new file mode 100644
index 000000000000..6715a17b5d0f
--- /dev/null
+++ b/drivers/parport/parport_serial.c
@@ -0,0 +1,485 @@
1/*
2 * Support for common PCI multi-I/O cards (which is most of them)
3 *
4 * Copyright (C) 2001 Tim Waugh <twaugh@redhat.com>
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
10 *
11 *
12 * Multi-function PCI cards are supposed to present separate logical
13 * devices on the bus. A common thing to do seems to be to just use
14 * one logical device with lots of base address registers for both
15 * parallel ports and serial ports. This driver is for dealing with
16 * that.
17 *
18 */
19
20#include <linux/types.h>
21#include <linux/module.h>
22#include <linux/init.h>
23#include <linux/pci.h>
24#include <linux/parport.h>
25#include <linux/parport_pc.h>
26#include <linux/serial.h>
27#include <linux/serialP.h>
28#include <linux/list.h>
29#include <linux/8250_pci.h>
30
31#include <asm/serial.h>
32
33enum parport_pc_pci_cards {
34 titan_110l = 0,
35 titan_210l,
36 netmos_9xx5_combo,
37 avlab_1s1p,
38 avlab_1s1p_650,
39 avlab_1s1p_850,
40 avlab_1s2p,
41 avlab_1s2p_650,
42 avlab_1s2p_850,
43 avlab_2s1p,
44 avlab_2s1p_650,
45 avlab_2s1p_850,
46 siig_1s1p_10x,
47 siig_2s1p_10x,
48 siig_2p1s_20x,
49 siig_1s1p_20x,
50 siig_2s1p_20x,
51};
52
53/* each element directly indexed from enum list, above */
54struct parport_pc_pci {
55 int numports;
56 struct { /* BAR (base address registers) numbers in the config
57 space header */
58 int lo;
59 int hi; /* -1 if not there, >6 for offset-method (max
60 BAR is 6) */
61 } addr[4];
62
63 /* If set, this is called immediately after pci_enable_device.
64 * If it returns non-zero, no probing will take place and the
65 * ports will not be used. */
66 int (*preinit_hook) (struct pci_dev *pdev, struct parport_pc_pci *card,
67 int autoirq, int autodma);
68
69 /* If set, this is called after probing for ports. If 'failed'
70 * is non-zero we couldn't use any of the ports. */
71 void (*postinit_hook) (struct pci_dev *pdev,
72 struct parport_pc_pci *card, int failed);
73};
74
75static int __devinit netmos_parallel_init(struct pci_dev *dev, struct parport_pc_pci *card, int autoirq, int autodma)
76{
77 /*
78 * Netmos uses the subdevice ID to indicate the number of parallel
79 * and serial ports. The form is 0x00PS, where <P> is the number of
80 * parallel ports and <S> is the number of serial ports.
81 */
82 card->numports = (dev->subsystem_device & 0xf0) >> 4;
83 return 0;
84}
85
86static struct parport_pc_pci cards[] __devinitdata = {
87 /* titan_110l */ { 1, { { 3, -1 }, } },
88 /* titan_210l */ { 1, { { 3, -1 }, } },
89 /* netmos_9xx5_combo */ { 1, { { 2, -1 }, }, netmos_parallel_init },
90 /* avlab_1s1p */ { 1, { { 1, 2}, } },
91 /* avlab_1s1p_650 */ { 1, { { 1, 2}, } },
92 /* avlab_1s1p_850 */ { 1, { { 1, 2}, } },
93 /* avlab_1s2p */ { 2, { { 1, 2}, { 3, 4 },} },
94 /* avlab_1s2p_650 */ { 2, { { 1, 2}, { 3, 4 },} },
95 /* avlab_1s2p_850 */ { 2, { { 1, 2}, { 3, 4 },} },
96 /* avlab_2s1p */ { 1, { { 2, 3}, } },
97 /* avlab_2s1p_650 */ { 1, { { 2, 3}, } },
98 /* avlab_2s1p_850 */ { 1, { { 2, 3}, } },
99 /* siig_1s1p_10x */ { 1, { { 3, 4 }, } },
100 /* siig_2s1p_10x */ { 1, { { 4, 5 }, } },
101 /* siig_2p1s_20x */ { 2, { { 1, 2 }, { 3, 4 }, } },
102 /* siig_1s1p_20x */ { 1, { { 1, 2 }, } },
103 /* siig_2s1p_20x */ { 1, { { 2, 3 }, } },
104};
105
106static struct pci_device_id parport_serial_pci_tbl[] = {
107 /* PCI cards */
108 { PCI_VENDOR_ID_TITAN, PCI_DEVICE_ID_TITAN_110L,
109 PCI_ANY_ID, PCI_ANY_ID, 0, 0, titan_110l },
110 { PCI_VENDOR_ID_TITAN, PCI_DEVICE_ID_TITAN_210L,
111 PCI_ANY_ID, PCI_ANY_ID, 0, 0, titan_210l },
112 { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9735,
113 PCI_ANY_ID, PCI_ANY_ID, 0, 0, netmos_9xx5_combo },
114 { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9745,
115 PCI_ANY_ID, PCI_ANY_ID, 0, 0, netmos_9xx5_combo },
116 { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9835,
117 PCI_ANY_ID, PCI_ANY_ID, 0, 0, netmos_9xx5_combo },
118 { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9835,
119 PCI_ANY_ID, PCI_ANY_ID, 0, 0, netmos_9xx5_combo },
120 { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9845,
121 PCI_ANY_ID, PCI_ANY_ID, 0, 0, netmos_9xx5_combo },
122 { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9855,
123 PCI_ANY_ID, PCI_ANY_ID, 0, 0, netmos_9xx5_combo },
124 /* PCI_VENDOR_ID_AVLAB/Intek21 has another bunch of cards ...*/
125 { 0x14db, 0x2110, PCI_ANY_ID, PCI_ANY_ID, 0, 0, avlab_1s1p},
126 { 0x14db, 0x2111, PCI_ANY_ID, PCI_ANY_ID, 0, 0, avlab_1s1p_650},
127 { 0x14db, 0x2112, PCI_ANY_ID, PCI_ANY_ID, 0, 0, avlab_1s1p_850},
128 { 0x14db, 0x2140, PCI_ANY_ID, PCI_ANY_ID, 0, 0, avlab_1s2p},
129 { 0x14db, 0x2141, PCI_ANY_ID, PCI_ANY_ID, 0, 0, avlab_1s2p_650},
130 { 0x14db, 0x2142, PCI_ANY_ID, PCI_ANY_ID, 0, 0, avlab_1s2p_850},
131 { 0x14db, 0x2160, PCI_ANY_ID, PCI_ANY_ID, 0, 0, avlab_2s1p},
132 { 0x14db, 0x2161, PCI_ANY_ID, PCI_ANY_ID, 0, 0, avlab_2s1p_650},
133 { 0x14db, 0x2162, PCI_ANY_ID, PCI_ANY_ID, 0, 0, avlab_2s1p_850},
134 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_1S1P_10x_550,
135 PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_1s1p_10x },
136 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_1S1P_10x_650,
137 PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_1s1p_10x },
138 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_1S1P_10x_850,
139 PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_1s1p_10x },
140 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_2S1P_10x_550,
141 PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_2s1p_10x },
142 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_2S1P_10x_650,
143 PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_2s1p_10x },
144 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_2S1P_10x_850,
145 PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_2s1p_10x },
146 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_2P1S_20x_550,
147 PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_2p1s_20x },
148 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_2P1S_20x_650,
149 PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_2p1s_20x },
150 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_2P1S_20x_850,
151 PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_2p1s_20x },
152 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_1S1P_20x_550,
153 PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_2s1p_20x },
154 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_1S1P_20x_650,
155 PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_1s1p_20x },
156 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_1S1P_20x_850,
157 PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_1s1p_20x },
158 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_2S1P_20x_550,
159 PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_2s1p_20x },
160 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_2S1P_20x_650,
161 PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_2s1p_20x },
162 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_2S1P_20x_850,
163 PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_2s1p_20x },
164
165 { 0, } /* terminate list */
166};
167MODULE_DEVICE_TABLE(pci,parport_serial_pci_tbl);
168
169struct pci_board_no_ids {
170 int flags;
171 int num_ports;
172 int base_baud;
173 int uart_offset;
174 int reg_shift;
175 int (*init_fn)(struct pci_dev *dev, struct pci_board_no_ids *board,
176 int enable);
177 int first_uart_offset;
178};
179
180static int __devinit siig10x_init_fn(struct pci_dev *dev, struct pci_board_no_ids *board, int enable)
181{
182 return pci_siig10x_fn(dev, enable);
183}
184
185static int __devinit siig20x_init_fn(struct pci_dev *dev, struct pci_board_no_ids *board, int enable)
186{
187 return pci_siig20x_fn(dev, enable);
188}
189
190static int __devinit netmos_serial_init(struct pci_dev *dev, struct pci_board_no_ids *board, int enable)
191{
192 board->num_ports = dev->subsystem_device & 0xf;
193 return 0;
194}
195
196static struct pci_board_no_ids pci_boards[] __devinitdata = {
197 /*
198 * PCI Flags, Number of Ports, Base (Maximum) Baud Rate,
199 * Offset to get to next UART's registers,
200 * Register shift to use for memory-mapped I/O,
201 * Initialization function, first UART offset
202 */
203
204// Cards not tested are marked n/t
205// If you have one of these cards and it works for you, please tell me..
206
207/* titan_110l */ { SPCI_FL_BASE1 | SPCI_FL_BASE_TABLE, 1, 921600 },
208/* titan_210l */ { SPCI_FL_BASE1 | SPCI_FL_BASE_TABLE, 2, 921600 },
209/* netmos_9xx5_combo */ { SPCI_FL_BASE0 | SPCI_FL_BASE_TABLE, 1, 115200, 0, 0, netmos_serial_init },
210/* avlab_1s1p (n/t) */ { SPCI_FL_BASE0 | SPCI_FL_BASE_TABLE, 1, 115200 },
211/* avlab_1s1p_650 (nt)*/{ SPCI_FL_BASE0 | SPCI_FL_BASE_TABLE, 1, 115200 },
212/* avlab_1s1p_850 (nt)*/{ SPCI_FL_BASE0 | SPCI_FL_BASE_TABLE, 1, 115200 },
213/* avlab_1s2p (n/t) */ { SPCI_FL_BASE0 | SPCI_FL_BASE_TABLE, 1, 115200 },
214/* avlab_1s2p_650 (nt)*/{ SPCI_FL_BASE0 | SPCI_FL_BASE_TABLE, 1, 115200 },
215/* avlab_1s2p_850 (nt)*/{ SPCI_FL_BASE0 | SPCI_FL_BASE_TABLE, 1, 115200 },
216/* avlab_2s1p (n/t) */ { SPCI_FL_BASE0 | SPCI_FL_BASE_TABLE, 2, 115200 },
217/* avlab_2s1p_650 (nt)*/{ SPCI_FL_BASE0 | SPCI_FL_BASE_TABLE, 2, 115200 },
218/* avlab_2s1p_850 (nt)*/{ SPCI_FL_BASE0 | SPCI_FL_BASE_TABLE, 2, 115200 },
219/* siig_1s1p_10x */ { SPCI_FL_BASE2, 1, 460800, 0, 0, siig10x_init_fn },
220/* siig_2s1p_10x */ { SPCI_FL_BASE2, 1, 921600, 0, 0, siig10x_init_fn },
221/* siig_2p1s_20x */ { SPCI_FL_BASE0, 1, 921600, 0, 0, siig20x_init_fn },
222/* siig_1s1p_20x */ { SPCI_FL_BASE0, 1, 921600, 0, 0, siig20x_init_fn },
223/* siig_2s1p_20x */ { SPCI_FL_BASE0, 1, 921600, 0, 0, siig20x_init_fn },
224};
225
226struct parport_serial_private {
227 int num_ser;
228 int line[20];
229 struct pci_board_no_ids ser;
230 int num_par;
231 struct parport *port[PARPORT_MAX];
232 struct parport_pc_pci par;
233};
234
235static int __devinit get_pci_port (struct pci_dev *dev,
236 struct pci_board_no_ids *board,
237 struct serial_struct *req,
238 int idx)
239{
240 unsigned long port;
241 int base_idx;
242 int max_port;
243 int offset;
244
245 base_idx = SPCI_FL_GET_BASE(board->flags);
246 if (board->flags & SPCI_FL_BASE_TABLE)
247 base_idx += idx;
248
249 if (board->flags & SPCI_FL_REGION_SZ_CAP) {
250 max_port = pci_resource_len(dev, base_idx) / 8;
251 if (idx >= max_port)
252 return 1;
253 }
254
255 offset = board->first_uart_offset;
256
257 /* Timedia/SUNIX uses a mixture of BARs and offsets */
258 /* Ugh, this is ugly as all hell --- TYT */
259 if(dev->vendor == PCI_VENDOR_ID_TIMEDIA ) /* 0x1409 */
260 switch(idx) {
261 case 0: base_idx=0;
262 break;
263 case 1: base_idx=0; offset=8;
264 break;
265 case 2: base_idx=1;
266 break;
267 case 3: base_idx=1; offset=8;
268 break;
269 case 4: /* BAR 2*/
270 case 5: /* BAR 3 */
271 case 6: /* BAR 4*/
272 case 7: base_idx=idx-2; /* BAR 5*/
273 }
274
275 port = pci_resource_start(dev, base_idx) + offset;
276
277 if ((board->flags & SPCI_FL_BASE_TABLE) == 0)
278 port += idx * (board->uart_offset ? board->uart_offset : 8);
279
280 if (pci_resource_flags (dev, base_idx) & IORESOURCE_IO) {
281 int high_bits_offset = ((sizeof(long)-sizeof(int))*8);
282 req->port = port;
283 if (high_bits_offset)
284 req->port_high = port >> high_bits_offset;
285 else
286 req->port_high = 0;
287 return 0;
288 }
289 req->io_type = SERIAL_IO_MEM;
290 req->iomem_base = ioremap(port, board->uart_offset);
291 req->iomem_reg_shift = board->reg_shift;
292 req->port = 0;
293 return req->iomem_base ? 0 : 1;
294}
295
296/* Register the serial port(s) of a PCI card. */
297static int __devinit serial_register (struct pci_dev *dev,
298 const struct pci_device_id *id)
299{
300 struct pci_board_no_ids *board;
301 struct parport_serial_private *priv = pci_get_drvdata (dev);
302 struct serial_struct serial_req;
303 int base_baud;
304 int k;
305 int success = 0;
306
307 priv->ser = pci_boards[id->driver_data];
308 board = &priv->ser;
309 if (board->init_fn && ((board->init_fn) (dev, board, 1) != 0))
310 return 1;
311
312 base_baud = board->base_baud;
313 if (!base_baud)
314 base_baud = BASE_BAUD;
315 memset (&serial_req, 0, sizeof (serial_req));
316
317 for (k = 0; k < board->num_ports; k++) {
318 int line;
319
320 if (priv->num_ser == ARRAY_SIZE (priv->line)) {
321 printk (KERN_WARNING
322 "parport_serial: %s: only %u serial lines "
323 "supported (%d reported)\n", pci_name (dev),
324 ARRAY_SIZE (priv->line), board->num_ports);
325 break;
326 }
327
328 serial_req.irq = dev->irq;
329 if (get_pci_port (dev, board, &serial_req, k))
330 break;
331 serial_req.flags = ASYNC_SKIP_TEST | ASYNC_AUTOPROBE;
332 serial_req.baud_base = base_baud;
333 line = register_serial (&serial_req);
334 if (line < 0) {
335 printk (KERN_DEBUG
336 "parport_serial: register_serial failed\n");
337 continue;
338 }
339 priv->line[priv->num_ser++] = line;
340 success = 1;
341 }
342
343 return success ? 0 : 1;
344}
345
346/* Register the parallel port(s) of a PCI card. */
347static int __devinit parport_register (struct pci_dev *dev,
348 const struct pci_device_id *id)
349{
350 struct parport_pc_pci *card;
351 struct parport_serial_private *priv = pci_get_drvdata (dev);
352 int i = id->driver_data, n;
353 int success = 0;
354
355 priv->par = cards[id->driver_data];
356 card = &priv->par;
357 if (card->preinit_hook &&
358 card->preinit_hook (dev, card, PARPORT_IRQ_NONE, PARPORT_DMA_NONE))
359 return -ENODEV;
360
361 for (n = 0; n < card->numports; n++) {
362 struct parport *port;
363 int lo = card->addr[n].lo;
364 int hi = card->addr[n].hi;
365 unsigned long io_lo, io_hi;
366
367 if (priv->num_par == ARRAY_SIZE (priv->port)) {
368 printk (KERN_WARNING
369 "parport_serial: %s: only %u parallel ports "
370 "supported (%d reported)\n", pci_name (dev),
371 ARRAY_SIZE (priv->port), card->numports);
372 break;
373 }
374
375 io_lo = pci_resource_start (dev, lo);
376 io_hi = 0;
377 if ((hi >= 0) && (hi <= 6))
378 io_hi = pci_resource_start (dev, hi);
379 else if (hi > 6)
380 io_lo += hi; /* Reinterpret the meaning of
381 "hi" as an offset (see SYBA
382 def.) */
383 /* TODO: test if sharing interrupts works */
384 printk (KERN_DEBUG "PCI parallel port detected: %04x:%04x, "
385 "I/O at %#lx(%#lx)\n",
386 parport_serial_pci_tbl[i].vendor,
387 parport_serial_pci_tbl[i].device, io_lo, io_hi);
388 port = parport_pc_probe_port (io_lo, io_hi, PARPORT_IRQ_NONE,
389 PARPORT_DMA_NONE, dev);
390 if (port) {
391 priv->port[priv->num_par++] = port;
392 success = 1;
393 }
394 }
395
396 if (card->postinit_hook)
397 card->postinit_hook (dev, card, !success);
398
399 return success ? 0 : 1;
400}
401
402static int __devinit parport_serial_pci_probe (struct pci_dev *dev,
403 const struct pci_device_id *id)
404{
405 struct parport_serial_private *priv;
406 int err;
407
408 priv = kmalloc (sizeof *priv, GFP_KERNEL);
409 if (!priv)
410 return -ENOMEM;
411 priv->num_ser = priv->num_par = 0;
412 pci_set_drvdata (dev, priv);
413
414 err = pci_enable_device (dev);
415 if (err) {
416 pci_set_drvdata (dev, NULL);
417 kfree (priv);
418 return err;
419 }
420
421 if (parport_register (dev, id)) {
422 pci_set_drvdata (dev, NULL);
423 kfree (priv);
424 return -ENODEV;
425 }
426
427 if (serial_register (dev, id)) {
428 int i;
429 for (i = 0; i < priv->num_par; i++)
430 parport_pc_unregister_port (priv->port[i]);
431 pci_set_drvdata (dev, NULL);
432 kfree (priv);
433 return -ENODEV;
434 }
435
436 return 0;
437}
438
439static void __devexit parport_serial_pci_remove (struct pci_dev *dev)
440{
441 struct parport_serial_private *priv = pci_get_drvdata (dev);
442 int i;
443
444 // Serial ports
445 for (i = 0; i < priv->num_ser; i++) {
446 unregister_serial (priv->line[i]);
447
448 if (priv->ser.init_fn)
449 (priv->ser.init_fn) (dev, &priv->ser, 0);
450 }
451 pci_set_drvdata (dev, NULL);
452
453 // Parallel ports
454 for (i = 0; i < priv->num_par; i++)
455 parport_pc_unregister_port (priv->port[i]);
456
457 kfree (priv);
458 return;
459}
460
461static struct pci_driver parport_serial_pci_driver = {
462 .name = "parport_serial",
463 .id_table = parport_serial_pci_tbl,
464 .probe = parport_serial_pci_probe,
465 .remove = __devexit_p(parport_serial_pci_remove),
466};
467
468
469static int __init parport_serial_init (void)
470{
471 return pci_module_init (&parport_serial_pci_driver);
472}
473
474static void __exit parport_serial_exit (void)
475{
476 pci_unregister_driver (&parport_serial_pci_driver);
477 return;
478}
479
480MODULE_AUTHOR("Tim Waugh <twaugh@redhat.com>");
481MODULE_DESCRIPTION("Driver for common parallel+serial multi-I/O PCI cards");
482MODULE_LICENSE("GPL");
483
484module_init(parport_serial_init);
485module_exit(parport_serial_exit);
diff --git a/drivers/parport/parport_sunbpp.c b/drivers/parport/parport_sunbpp.c
new file mode 100644
index 000000000000..36a1556e64c7
--- /dev/null
+++ b/drivers/parport/parport_sunbpp.c
@@ -0,0 +1,412 @@
1/* $Id: parport_sunbpp.c,v 1.12 2001/05/26 03:01:42 davem Exp $
2 * Parallel-port routines for Sun architecture
3 *
4 * Author: Derrick J. Brashear <shadow@dementia.org>
5 *
6 * based on work by:
7 * Phil Blundell <philb@gnu.org>
8 * Tim Waugh <tim@cyberelk.demon.co.uk>
9 * Jose Renau <renau@acm.org>
10 * David Campbell <campbell@tirian.che.curtin.edu.au>
11 * Grant Guenther <grant@torque.net>
12 * Eddie C. Dost <ecd@skynet.be>
13 * Stephen Williams (steve@icarus.com)
14 * Gus Baldauf (gbaldauf@ix.netcom.com)
15 * Peter Zaitcev
16 * Tom Dyas
17 */
18
19#include <linux/string.h>
20#include <linux/module.h>
21#include <linux/delay.h>
22#include <linux/errno.h>
23#include <linux/ioport.h>
24#include <linux/kernel.h>
25#include <linux/slab.h>
26#include <linux/init.h>
27
28#include <linux/parport.h>
29
30#include <asm/ptrace.h>
31#include <linux/interrupt.h>
32
33#include <asm/io.h>
34#include <asm/oplib.h> /* OpenProm Library */
35#include <asm/sbus.h>
36#include <asm/dma.h> /* BPP uses LSI 64854 for DMA */
37#include <asm/irq.h>
38#include <asm/sunbpp.h>
39
40#undef __SUNBPP_DEBUG
41#ifdef __SUNBPP_DEBUG
42#define dprintk(x) printk x
43#else
44#define dprintk(x)
45#endif
46
47static irqreturn_t parport_sunbpp_interrupt(int irq, void *dev_id, struct pt_regs *regs)
48{
49 parport_generic_irq(irq, (struct parport *) dev_id, regs);
50 return IRQ_HANDLED;
51}
52
53static void parport_sunbpp_disable_irq(struct parport *p)
54{
55 struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;
56 u32 tmp;
57
58 tmp = sbus_readl(&regs->p_csr);
59 tmp &= ~DMA_INT_ENAB;
60 sbus_writel(tmp, &regs->p_csr);
61}
62
63static void parport_sunbpp_enable_irq(struct parport *p)
64{
65 struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;
66 u32 tmp;
67
68 tmp = sbus_readl(&regs->p_csr);
69 tmp |= DMA_INT_ENAB;
70 sbus_writel(tmp, &regs->p_csr);
71}
72
73static void parport_sunbpp_write_data(struct parport *p, unsigned char d)
74{
75 struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;
76
77 sbus_writeb(d, &regs->p_dr);
78 dprintk((KERN_DEBUG "wrote 0x%x\n", d));
79}
80
81static unsigned char parport_sunbpp_read_data(struct parport *p)
82{
83 struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;
84
85 return sbus_readb(&regs->p_dr);
86}
87
88#if 0
89static void control_pc_to_sunbpp(struct parport *p, unsigned char status)
90{
91 struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;
92 unsigned char value_tcr = sbus_readb(&regs->p_tcr);
93 unsigned char value_or = sbus_readb(&regs->p_or);
94
95 if (status & PARPORT_CONTROL_STROBE)
96 value_tcr |= P_TCR_DS;
97 if (status & PARPORT_CONTROL_AUTOFD)
98 value_or |= P_OR_AFXN;
99 if (status & PARPORT_CONTROL_INIT)
100 value_or |= P_OR_INIT;
101 if (status & PARPORT_CONTROL_SELECT)
102 value_or |= P_OR_SLCT_IN;
103
104 sbus_writeb(value_or, &regs->p_or);
105 sbus_writeb(value_tcr, &regs->p_tcr);
106}
107#endif
108
109static unsigned char status_sunbpp_to_pc(struct parport *p)
110{
111 struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;
112 unsigned char bits = 0;
113 unsigned char value_tcr = sbus_readb(&regs->p_tcr);
114 unsigned char value_ir = sbus_readb(&regs->p_ir);
115
116 if (!(value_ir & P_IR_ERR))
117 bits |= PARPORT_STATUS_ERROR;
118 if (!(value_ir & P_IR_SLCT))
119 bits |= PARPORT_STATUS_SELECT;
120 if (!(value_ir & P_IR_PE))
121 bits |= PARPORT_STATUS_PAPEROUT;
122 if (value_tcr & P_TCR_ACK)
123 bits |= PARPORT_STATUS_ACK;
124 if (!(value_tcr & P_TCR_BUSY))
125 bits |= PARPORT_STATUS_BUSY;
126
127 dprintk((KERN_DEBUG "tcr 0x%x ir 0x%x\n", regs->p_tcr, regs->p_ir));
128 dprintk((KERN_DEBUG "read status 0x%x\n", bits));
129 return bits;
130}
131
132static unsigned char control_sunbpp_to_pc(struct parport *p)
133{
134 struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;
135 unsigned char bits = 0;
136 unsigned char value_tcr = sbus_readb(&regs->p_tcr);
137 unsigned char value_or = sbus_readb(&regs->p_or);
138
139 if (!(value_tcr & P_TCR_DS))
140 bits |= PARPORT_CONTROL_STROBE;
141 if (!(value_or & P_OR_AFXN))
142 bits |= PARPORT_CONTROL_AUTOFD;
143 if (!(value_or & P_OR_INIT))
144 bits |= PARPORT_CONTROL_INIT;
145 if (value_or & P_OR_SLCT_IN)
146 bits |= PARPORT_CONTROL_SELECT;
147
148 dprintk((KERN_DEBUG "tcr 0x%x or 0x%x\n", regs->p_tcr, regs->p_or));
149 dprintk((KERN_DEBUG "read control 0x%x\n", bits));
150 return bits;
151}
152
153static unsigned char parport_sunbpp_read_control(struct parport *p)
154{
155 return control_sunbpp_to_pc(p);
156}
157
158static unsigned char parport_sunbpp_frob_control(struct parport *p,
159 unsigned char mask,
160 unsigned char val)
161{
162 struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;
163 unsigned char value_tcr = sbus_readb(&regs->p_tcr);
164 unsigned char value_or = sbus_readb(&regs->p_or);
165
166 dprintk((KERN_DEBUG "frob1: tcr 0x%x or 0x%x\n", regs->p_tcr, regs->p_or));
167 if (mask & PARPORT_CONTROL_STROBE) {
168 if (val & PARPORT_CONTROL_STROBE) {
169 value_tcr &= ~P_TCR_DS;
170 } else {
171 value_tcr |= P_TCR_DS;
172 }
173 }
174 if (mask & PARPORT_CONTROL_AUTOFD) {
175 if (val & PARPORT_CONTROL_AUTOFD) {
176 value_or &= ~P_OR_AFXN;
177 } else {
178 value_or |= P_OR_AFXN;
179 }
180 }
181 if (mask & PARPORT_CONTROL_INIT) {
182 if (val & PARPORT_CONTROL_INIT) {
183 value_or &= ~P_OR_INIT;
184 } else {
185 value_or |= P_OR_INIT;
186 }
187 }
188 if (mask & PARPORT_CONTROL_SELECT) {
189 if (val & PARPORT_CONTROL_SELECT) {
190 value_or |= P_OR_SLCT_IN;
191 } else {
192 value_or &= ~P_OR_SLCT_IN;
193 }
194 }
195
196 sbus_writeb(value_or, &regs->p_or);
197 sbus_writeb(value_tcr, &regs->p_tcr);
198 dprintk((KERN_DEBUG "frob2: tcr 0x%x or 0x%x\n", regs->p_tcr, regs->p_or));
199 return parport_sunbpp_read_control(p);
200}
201
202static void parport_sunbpp_write_control(struct parport *p, unsigned char d)
203{
204 const unsigned char wm = (PARPORT_CONTROL_STROBE |
205 PARPORT_CONTROL_AUTOFD |
206 PARPORT_CONTROL_INIT |
207 PARPORT_CONTROL_SELECT);
208
209 parport_sunbpp_frob_control (p, wm, d & wm);
210}
211
212static unsigned char parport_sunbpp_read_status(struct parport *p)
213{
214 return status_sunbpp_to_pc(p);
215}
216
217static void parport_sunbpp_data_forward (struct parport *p)
218{
219 struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;
220 unsigned char value_tcr = sbus_readb(&regs->p_tcr);
221
222 dprintk((KERN_DEBUG "forward\n"));
223 value_tcr &= ~P_TCR_DIR;
224 sbus_writeb(value_tcr, &regs->p_tcr);
225}
226
227static void parport_sunbpp_data_reverse (struct parport *p)
228{
229 struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;
230 u8 val = sbus_readb(&regs->p_tcr);
231
232 dprintk((KERN_DEBUG "reverse\n"));
233 val |= P_TCR_DIR;
234 sbus_writeb(val, &regs->p_tcr);
235}
236
237static void parport_sunbpp_init_state(struct pardevice *dev, struct parport_state *s)
238{
239 s->u.pc.ctr = 0xc;
240 s->u.pc.ecr = 0x0;
241}
242
243static void parport_sunbpp_save_state(struct parport *p, struct parport_state *s)
244{
245 s->u.pc.ctr = parport_sunbpp_read_control(p);
246}
247
248static void parport_sunbpp_restore_state(struct parport *p, struct parport_state *s)
249{
250 parport_sunbpp_write_control(p, s->u.pc.ctr);
251}
252
253static struct parport_operations parport_sunbpp_ops =
254{
255 .write_data = parport_sunbpp_write_data,
256 .read_data = parport_sunbpp_read_data,
257
258 .write_control = parport_sunbpp_write_control,
259 .read_control = parport_sunbpp_read_control,
260 .frob_control = parport_sunbpp_frob_control,
261
262 .read_status = parport_sunbpp_read_status,
263
264 .enable_irq = parport_sunbpp_enable_irq,
265 .disable_irq = parport_sunbpp_disable_irq,
266
267 .data_forward = parport_sunbpp_data_forward,
268 .data_reverse = parport_sunbpp_data_reverse,
269
270 .init_state = parport_sunbpp_init_state,
271 .save_state = parport_sunbpp_save_state,
272 .restore_state = parport_sunbpp_restore_state,
273
274 .epp_write_data = parport_ieee1284_epp_write_data,
275 .epp_read_data = parport_ieee1284_epp_read_data,
276 .epp_write_addr = parport_ieee1284_epp_write_addr,
277 .epp_read_addr = parport_ieee1284_epp_read_addr,
278
279 .ecp_write_data = parport_ieee1284_ecp_write_data,
280 .ecp_read_data = parport_ieee1284_ecp_read_data,
281 .ecp_write_addr = parport_ieee1284_ecp_write_addr,
282
283 .compat_write_data = parport_ieee1284_write_compat,
284 .nibble_read_data = parport_ieee1284_read_nibble,
285 .byte_read_data = parport_ieee1284_read_byte,
286
287 .owner = THIS_MODULE,
288};
289
290typedef struct {
291 struct list_head list;
292 struct parport *port;
293} Node;
294/* no locks, everything's serialized */
295static LIST_HEAD(port_list);
296
297static int __init init_one_port(struct sbus_dev *sdev)
298{
299 struct parport *p;
300 /* at least in theory there may be a "we don't dma" case */
301 struct parport_operations *ops;
302 void __iomem *base;
303 int irq, dma, err = 0, size;
304 struct bpp_regs __iomem *regs;
305 unsigned char value_tcr;
306 Node *node;
307
308 dprintk((KERN_DEBUG "init_one_port(%p): ranges, alloc_io, ", sdev));
309 node = kmalloc(sizeof(Node), GFP_KERNEL);
310 if (!node)
311 goto out0;
312
313 irq = sdev->irqs[0];
314 base = sbus_ioremap(&sdev->resource[0], 0,
315 sdev->reg_addrs[0].reg_size,
316 "sunbpp");
317 if (!base)
318 goto out1;
319
320 size = sdev->reg_addrs[0].reg_size;
321 dma = PARPORT_DMA_NONE;
322
323 dprintk(("alloc(ppops), "));
324 ops = kmalloc (sizeof (struct parport_operations), GFP_KERNEL);
325 if (!ops)
326 goto out2;
327
328 memcpy (ops, &parport_sunbpp_ops, sizeof (struct parport_operations));
329
330 dprintk(("register_port\n"));
331 if (!(p = parport_register_port((unsigned long)base, irq, dma, ops)))
332 goto out3;
333
334 p->size = size;
335
336 dprintk((KERN_DEBUG "init_one_port: request_irq(%08x:%p:%x:%s:%p) ",
337 p->irq, parport_sunbpp_interrupt, SA_SHIRQ, p->name, p));
338 if ((err = request_irq(p->irq, parport_sunbpp_interrupt,
339 SA_SHIRQ, p->name, p)) != 0) {
340 dprintk(("ERROR %d\n", err));
341 goto out4;
342 }
343 dprintk(("OK\n"));
344 parport_sunbpp_enable_irq(p);
345
346 regs = (struct bpp_regs __iomem *)p->base;
347 dprintk((KERN_DEBUG "forward\n"));
348 value_tcr = sbus_readb(&regs->p_tcr);
349 value_tcr &= ~P_TCR_DIR;
350 sbus_writeb(value_tcr, &regs->p_tcr);
351
352 printk(KERN_INFO "%s: sunbpp at 0x%lx\n", p->name, p->base);
353 node->port = p;
354 list_add(&node->list, &port_list);
355 parport_announce_port (p);
356
357 return 1;
358
359out4:
360 parport_put_port(p);
361out3:
362 kfree(ops);
363out2:
364 sbus_iounmap(base, size);
365out1:
366 kfree(node);
367out0:
368 return err;
369}
370
371static int __init parport_sunbpp_init(void)
372{
373 struct sbus_bus *sbus;
374 struct sbus_dev *sdev;
375 int count = 0;
376
377 for_each_sbus(sbus) {
378 for_each_sbusdev(sdev, sbus) {
379 if (!strcmp(sdev->prom_name, "SUNW,bpp"))
380 count += init_one_port(sdev);
381 }
382 }
383 return count ? 0 : -ENODEV;
384}
385
386static void __exit parport_sunbpp_exit(void)
387{
388 while (!list_empty(&port_list)) {
389 Node *node = list_entry(port_list.next, Node, list);
390 struct parport *p = node->port;
391 struct parport_operations *ops = p->ops;
392 parport_remove_port(p);
393
394 if (p->irq != PARPORT_IRQ_NONE) {
395 parport_sunbpp_disable_irq(p);
396 free_irq(p->irq, p);
397 }
398 sbus_iounmap((void __iomem *)p->base, p->size);
399 parport_put_port(p);
400 kfree (ops);
401 list_del(&node->list);
402 kfree (node);
403 }
404}
405
406MODULE_AUTHOR("Derrick J Brashear");
407MODULE_DESCRIPTION("Parport Driver for Sparc bidirectional Port");
408MODULE_SUPPORTED_DEVICE("Sparc Bidirectional Parallel Port");
409MODULE_LICENSE("GPL");
410
411module_init(parport_sunbpp_init)
412module_exit(parport_sunbpp_exit)
diff --git a/drivers/parport/probe.c b/drivers/parport/probe.c
new file mode 100644
index 000000000000..c94963145e17
--- /dev/null
+++ b/drivers/parport/probe.c
@@ -0,0 +1,224 @@
1/* $Id: parport_probe.c,v 1.1 1999/07/03 08:56:17 davem Exp $
2 * Parallel port device probing code
3 *
4 * Authors: Carsten Gross, carsten@sol.wohnheim.uni-ulm.de
5 * Philip Blundell <philb@gnu.org>
6 */
7
8#include <linux/module.h>
9#include <linux/parport.h>
10#include <linux/ctype.h>
11#include <linux/string.h>
12#include <asm/uaccess.h>
13
14static struct {
15 char *token;
16 char *descr;
17} classes[] = {
18 { "", "Legacy device" },
19 { "PRINTER", "Printer" },
20 { "MODEM", "Modem" },
21 { "NET", "Network device" },
22 { "HDC", "Hard disk" },
23 { "PCMCIA", "PCMCIA" },
24 { "MEDIA", "Multimedia device" },
25 { "FDC", "Floppy disk" },
26 { "PORTS", "Ports" },
27 { "SCANNER", "Scanner" },
28 { "DIGICAM", "Digital camera" },
29 { "", "Unknown device" },
30 { "", "Unspecified" },
31 { "SCSIADAPTER", "SCSI adapter" },
32 { NULL, NULL }
33};
34
35static void pretty_print(struct parport *port, int device)
36{
37 struct parport_device_info *info = &port->probe_info[device + 1];
38
39 printk(KERN_INFO "%s", port->name);
40
41 if (device >= 0)
42 printk (" (addr %d)", device);
43
44 printk (": %s", classes[info->class].descr);
45 if (info->class)
46 printk(", %s %s", info->mfr, info->model);
47
48 printk("\n");
49}
50
51static char *strdup(char *str)
52{
53 int n = strlen(str)+1;
54 char *s = kmalloc(n, GFP_KERNEL);
55 if (!s) return NULL;
56 return strcpy(s, str);
57}
58
59static void parse_data(struct parport *port, int device, char *str)
60{
61 char *txt = kmalloc(strlen(str)+1, GFP_KERNEL);
62 char *p = txt, *q;
63 int guessed_class = PARPORT_CLASS_UNSPEC;
64 struct parport_device_info *info = &port->probe_info[device + 1];
65
66 if (!txt) {
67 printk(KERN_WARNING "%s probe: memory squeeze\n", port->name);
68 return;
69 }
70 strcpy(txt, str);
71 while (p) {
72 char *sep;
73 q = strchr(p, ';');
74 if (q) *q = 0;
75 sep = strchr(p, ':');
76 if (sep) {
77 char *u;
78 *(sep++) = 0;
79 /* Get rid of trailing blanks */
80 u = sep + strlen (sep) - 1;
81 while (u >= p && *u == ' ')
82 *u-- = '\0';
83 u = p;
84 while (*u) {
85 *u = toupper(*u);
86 u++;
87 }
88 if (!strcmp(p, "MFG") || !strcmp(p, "MANUFACTURER")) {
89 if (info->mfr)
90 kfree (info->mfr);
91 info->mfr = strdup(sep);
92 } else if (!strcmp(p, "MDL") || !strcmp(p, "MODEL")) {
93 if (info->model)
94 kfree (info->model);
95 info->model = strdup(sep);
96 } else if (!strcmp(p, "CLS") || !strcmp(p, "CLASS")) {
97 int i;
98 if (info->class_name)
99 kfree (info->class_name);
100 info->class_name = strdup(sep);
101 for (u = sep; *u; u++)
102 *u = toupper(*u);
103 for (i = 0; classes[i].token; i++) {
104 if (!strcmp(classes[i].token, sep)) {
105 info->class = i;
106 goto rock_on;
107 }
108 }
109 printk(KERN_WARNING "%s probe: warning, class '%s' not understood.\n", port->name, sep);
110 info->class = PARPORT_CLASS_OTHER;
111 } else if (!strcmp(p, "CMD") ||
112 !strcmp(p, "COMMAND SET")) {
113 if (info->cmdset)
114 kfree (info->cmdset);
115 info->cmdset = strdup(sep);
116 /* if it speaks printer language, it's
117 probably a printer */
118 if (strstr(sep, "PJL") || strstr(sep, "PCL"))
119 guessed_class = PARPORT_CLASS_PRINTER;
120 } else if (!strcmp(p, "DES") || !strcmp(p, "DESCRIPTION")) {
121 if (info->description)
122 kfree (info->description);
123 info->description = strdup(sep);
124 }
125 }
126 rock_on:
127 if (q) p = q+1; else p=NULL;
128 }
129
130 /* If the device didn't tell us its class, maybe we have managed to
131 guess one from the things it did say. */
132 if (info->class == PARPORT_CLASS_UNSPEC)
133 info->class = guessed_class;
134
135 pretty_print (port, device);
136
137 kfree(txt);
138}
139
140/* Get Std 1284 Device ID. */
141ssize_t parport_device_id (int devnum, char *buffer, size_t len)
142{
143 ssize_t retval = -ENXIO;
144 struct pardevice *dev = parport_open (devnum, "Device ID probe",
145 NULL, NULL, NULL, 0, NULL);
146 if (!dev)
147 return -ENXIO;
148
149 parport_claim_or_block (dev);
150
151 /* Negotiate to compatibility mode, and then to device ID mode.
152 * (This is in case we are already in device ID mode.) */
153 parport_negotiate (dev->port, IEEE1284_MODE_COMPAT);
154 retval = parport_negotiate (dev->port,
155 IEEE1284_MODE_NIBBLE | IEEE1284_DEVICEID);
156
157 if (!retval) {
158 int idlen;
159 unsigned char length[2];
160
161 /* First two bytes are MSB,LSB of inclusive length. */
162 retval = parport_read (dev->port, length, 2);
163
164 if (retval != 2) goto end_id;
165
166 idlen = (length[0] << 8) + length[1] - 2;
167 /*
168 * Check if the caller-allocated buffer is large enough
169 * otherwise bail out or there will be an at least off by one.
170 */
171 if (idlen + 1 < len)
172 len = idlen;
173 else {
174 retval = -EINVAL;
175 goto out;
176 }
177 retval = parport_read (dev->port, buffer, len);
178
179 if (retval != len)
180 printk (KERN_DEBUG "%s: only read %Zd of %Zd ID bytes\n",
181 dev->port->name, retval,
182 len);
183
184 /* Some printer manufacturers mistakenly believe that
185 the length field is supposed to be _exclusive_.
186 In addition, there are broken devices out there
187 that don't even finish off with a semi-colon. */
188 if (buffer[len - 1] != ';') {
189 ssize_t diff;
190 diff = parport_read (dev->port, buffer + len, 2);
191 retval += diff;
192
193 if (diff)
194 printk (KERN_DEBUG
195 "%s: device reported incorrect "
196 "length field (%d, should be %Zd)\n",
197 dev->port->name, idlen, retval);
198 else {
199 /* One semi-colon short of a device ID. */
200 buffer[len++] = ';';
201 printk (KERN_DEBUG "%s: faking semi-colon\n",
202 dev->port->name);
203
204 /* If we get here, I don't think we
205 need to worry about the possible
206 standard violation of having read
207 more than we were told to. The
208 device is non-compliant anyhow. */
209 }
210 }
211
212 end_id:
213 buffer[len] = '\0';
214 parport_negotiate (dev->port, IEEE1284_MODE_COMPAT);
215 }
216
217 if (retval > 2)
218 parse_data (dev->port, dev->daisy, buffer);
219
220out:
221 parport_release (dev);
222 parport_close (dev);
223 return retval;
224}
diff --git a/drivers/parport/procfs.c b/drivers/parport/procfs.c
new file mode 100644
index 000000000000..cbe17184b9c7
--- /dev/null
+++ b/drivers/parport/procfs.c
@@ -0,0 +1,533 @@
1/* Sysctl interface for parport devices.
2 *
3 * Authors: David Campbell <campbell@torque.net>
4 * Tim Waugh <tim@cyberelk.demon.co.uk>
5 * Philip Blundell <philb@gnu.org>
6 * Andrea Arcangeli
7 * Riccardo Facchetti <fizban@tin.it>
8 *
9 * based on work by Grant Guenther <grant@torque.net>
10 * and Philip Blundell
11 *
12 * Cleaned up include files - Russell King <linux@arm.uk.linux.org>
13 */
14
15#include <linux/string.h>
16#include <linux/config.h>
17#include <linux/init.h>
18#include <linux/module.h>
19#include <linux/errno.h>
20#include <linux/kernel.h>
21#include <linux/slab.h>
22#include <linux/parport.h>
23#include <linux/ctype.h>
24#include <linux/sysctl.h>
25
26#include <asm/uaccess.h>
27
28#if defined(CONFIG_SYSCTL) && defined(CONFIG_PROC_FS)
29
30#define PARPORT_MIN_TIMESLICE_VALUE 1ul
31#define PARPORT_MAX_TIMESLICE_VALUE ((unsigned long) HZ)
32#define PARPORT_MIN_SPINTIME_VALUE 1
33#define PARPORT_MAX_SPINTIME_VALUE 1000
34
35static int do_active_device(ctl_table *table, int write, struct file *filp,
36 void __user *result, size_t *lenp, loff_t *ppos)
37{
38 struct parport *port = (struct parport *)table->extra1;
39 char buffer[256];
40 struct pardevice *dev;
41 int len = 0;
42
43 if (write) /* can't happen anyway */
44 return -EACCES;
45
46 if (*ppos) {
47 *lenp = 0;
48 return 0;
49 }
50
51 for (dev = port->devices; dev ; dev = dev->next) {
52 if(dev == port->cad) {
53 len += sprintf(buffer, "%s\n", dev->name);
54 }
55 }
56
57 if(!len) {
58 len += sprintf(buffer, "%s\n", "none");
59 }
60
61 if (len > *lenp)
62 len = *lenp;
63 else
64 *lenp = len;
65
66 *ppos += len;
67
68 return copy_to_user(result, buffer, len) ? -EFAULT : 0;
69}
70
71#ifdef CONFIG_PARPORT_1284
72static int do_autoprobe(ctl_table *table, int write, struct file *filp,
73 void __user *result, size_t *lenp, loff_t *ppos)
74{
75 struct parport_device_info *info = table->extra2;
76 const char *str;
77 char buffer[256];
78 int len = 0;
79
80 if (write) /* permissions stop this */
81 return -EACCES;
82
83 if (*ppos) {
84 *lenp = 0;
85 return 0;
86 }
87
88 if ((str = info->class_name) != NULL)
89 len += sprintf (buffer + len, "CLASS:%s;\n", str);
90
91 if ((str = info->model) != NULL)
92 len += sprintf (buffer + len, "MODEL:%s;\n", str);
93
94 if ((str = info->mfr) != NULL)
95 len += sprintf (buffer + len, "MANUFACTURER:%s;\n", str);
96
97 if ((str = info->description) != NULL)
98 len += sprintf (buffer + len, "DESCRIPTION:%s;\n", str);
99
100 if ((str = info->cmdset) != NULL)
101 len += sprintf (buffer + len, "COMMAND SET:%s;\n", str);
102
103 if (len > *lenp)
104 len = *lenp;
105 else
106 *lenp = len;
107
108 *ppos += len;
109
110 return copy_to_user (result, buffer, len) ? -EFAULT : 0;
111}
112#endif /* IEEE1284.3 support. */
113
114static int do_hardware_base_addr (ctl_table *table, int write,
115 struct file *filp, void __user *result,
116 size_t *lenp, loff_t *ppos)
117{
118 struct parport *port = (struct parport *)table->extra1;
119 char buffer[20];
120 int len = 0;
121
122 if (*ppos) {
123 *lenp = 0;
124 return 0;
125 }
126
127 if (write) /* permissions prevent this anyway */
128 return -EACCES;
129
130 len += sprintf (buffer, "%lu\t%lu\n", port->base, port->base_hi);
131
132 if (len > *lenp)
133 len = *lenp;
134 else
135 *lenp = len;
136
137 *ppos += len;
138
139 return copy_to_user(result, buffer, len) ? -EFAULT : 0;
140}
141
142static int do_hardware_irq (ctl_table *table, int write,
143 struct file *filp, void __user *result,
144 size_t *lenp, loff_t *ppos)
145{
146 struct parport *port = (struct parport *)table->extra1;
147 char buffer[20];
148 int len = 0;
149
150 if (*ppos) {
151 *lenp = 0;
152 return 0;
153 }
154
155 if (write) /* permissions prevent this anyway */
156 return -EACCES;
157
158 len += sprintf (buffer, "%d\n", port->irq);
159
160 if (len > *lenp)
161 len = *lenp;
162 else
163 *lenp = len;
164
165 *ppos += len;
166
167 return copy_to_user(result, buffer, len) ? -EFAULT : 0;
168}
169
170static int do_hardware_dma (ctl_table *table, int write,
171 struct file *filp, void __user *result,
172 size_t *lenp, loff_t *ppos)
173{
174 struct parport *port = (struct parport *)table->extra1;
175 char buffer[20];
176 int len = 0;
177
178 if (*ppos) {
179 *lenp = 0;
180 return 0;
181 }
182
183 if (write) /* permissions prevent this anyway */
184 return -EACCES;
185
186 len += sprintf (buffer, "%d\n", port->dma);
187
188 if (len > *lenp)
189 len = *lenp;
190 else
191 *lenp = len;
192
193 *ppos += len;
194
195 return copy_to_user(result, buffer, len) ? -EFAULT : 0;
196}
197
198static int do_hardware_modes (ctl_table *table, int write,
199 struct file *filp, void __user *result,
200 size_t *lenp, loff_t *ppos)
201{
202 struct parport *port = (struct parport *)table->extra1;
203 char buffer[40];
204 int len = 0;
205
206 if (*ppos) {
207 *lenp = 0;
208 return 0;
209 }
210
211 if (write) /* permissions prevent this anyway */
212 return -EACCES;
213
214 {
215#define printmode(x) {if(port->modes&PARPORT_MODE_##x){len+=sprintf(buffer+len,"%s%s",f?",":"",#x);f++;}}
216 int f = 0;
217 printmode(PCSPP);
218 printmode(TRISTATE);
219 printmode(COMPAT);
220 printmode(EPP);
221 printmode(ECP);
222 printmode(DMA);
223#undef printmode
224 }
225 buffer[len++] = '\n';
226
227 if (len > *lenp)
228 len = *lenp;
229 else
230 *lenp = len;
231
232 *ppos += len;
233
234 return copy_to_user(result, buffer, len) ? -EFAULT : 0;
235}
236
237#define PARPORT_PORT_DIR(child) { 0, NULL, NULL, 0, 0555, child }
238#define PARPORT_PARPORT_DIR(child) { DEV_PARPORT, "parport", \
239 NULL, 0, 0555, child }
240#define PARPORT_DEV_DIR(child) { CTL_DEV, "dev", NULL, 0, 0555, child }
241#define PARPORT_DEVICES_ROOT_DIR { DEV_PARPORT_DEVICES, "devices", \
242 NULL, 0, 0555, NULL }
243
244static const unsigned long parport_min_timeslice_value =
245PARPORT_MIN_TIMESLICE_VALUE;
246
247static const unsigned long parport_max_timeslice_value =
248PARPORT_MAX_TIMESLICE_VALUE;
249
250static const int parport_min_spintime_value =
251PARPORT_MIN_SPINTIME_VALUE;
252
253static const int parport_max_spintime_value =
254PARPORT_MAX_SPINTIME_VALUE;
255
256
257struct parport_sysctl_table {
258 struct ctl_table_header *sysctl_header;
259 ctl_table vars[12];
260 ctl_table device_dir[2];
261 ctl_table port_dir[2];
262 ctl_table parport_dir[2];
263 ctl_table dev_dir[2];
264};
265
266static const struct parport_sysctl_table parport_sysctl_template = {
267 NULL,
268 {
269 { DEV_PARPORT_SPINTIME, "spintime",
270 NULL, sizeof(int), 0644, NULL,
271 &proc_dointvec_minmax, NULL, NULL,
272 (void*) &parport_min_spintime_value,
273 (void*) &parport_max_spintime_value },
274 { DEV_PARPORT_BASE_ADDR, "base-addr",
275 NULL, 0, 0444, NULL,
276 &do_hardware_base_addr },
277 { DEV_PARPORT_IRQ, "irq",
278 NULL, 0, 0444, NULL,
279 &do_hardware_irq },
280 { DEV_PARPORT_DMA, "dma",
281 NULL, 0, 0444, NULL,
282 &do_hardware_dma },
283 { DEV_PARPORT_MODES, "modes",
284 NULL, 0, 0444, NULL,
285 &do_hardware_modes },
286 PARPORT_DEVICES_ROOT_DIR,
287#ifdef CONFIG_PARPORT_1284
288 { DEV_PARPORT_AUTOPROBE, "autoprobe",
289 NULL, 0, 0444, NULL,
290 &do_autoprobe },
291 { DEV_PARPORT_AUTOPROBE + 1, "autoprobe0",
292 NULL, 0, 0444, NULL,
293 &do_autoprobe },
294 { DEV_PARPORT_AUTOPROBE + 2, "autoprobe1",
295 NULL, 0, 0444, NULL,
296 &do_autoprobe },
297 { DEV_PARPORT_AUTOPROBE + 3, "autoprobe2",
298 NULL, 0, 0444, NULL,
299 &do_autoprobe },
300 { DEV_PARPORT_AUTOPROBE + 4, "autoprobe3",
301 NULL, 0, 0444, NULL,
302 &do_autoprobe },
303#endif /* IEEE 1284 support */
304 {0}
305 },
306 { {DEV_PARPORT_DEVICES_ACTIVE, "active", NULL, 0, 0444, NULL,
307 &do_active_device }, {0}},
308 { PARPORT_PORT_DIR(NULL), {0}},
309 { PARPORT_PARPORT_DIR(NULL), {0}},
310 { PARPORT_DEV_DIR(NULL), {0}}
311};
312
313struct parport_device_sysctl_table
314{
315 struct ctl_table_header *sysctl_header;
316 ctl_table vars[2];
317 ctl_table device_dir[2];
318 ctl_table devices_root_dir[2];
319 ctl_table port_dir[2];
320 ctl_table parport_dir[2];
321 ctl_table dev_dir[2];
322};
323
324static const struct parport_device_sysctl_table
325parport_device_sysctl_template = {
326 NULL,
327 {
328 { DEV_PARPORT_DEVICE_TIMESLICE, "timeslice",
329 NULL, sizeof(int), 0644, NULL,
330 &proc_doulongvec_ms_jiffies_minmax, NULL, NULL,
331 (void*) &parport_min_timeslice_value,
332 (void*) &parport_max_timeslice_value },
333 },
334 { {0, NULL, NULL, 0, 0555, NULL}, {0}},
335 { PARPORT_DEVICES_ROOT_DIR, {0}},
336 { PARPORT_PORT_DIR(NULL), {0}},
337 { PARPORT_PARPORT_DIR(NULL), {0}},
338 { PARPORT_DEV_DIR(NULL), {0}}
339};
340
341struct parport_default_sysctl_table
342{
343 struct ctl_table_header *sysctl_header;
344 ctl_table vars[3];
345 ctl_table default_dir[2];
346 ctl_table parport_dir[2];
347 ctl_table dev_dir[2];
348};
349
350extern unsigned long parport_default_timeslice;
351extern int parport_default_spintime;
352
353static struct parport_default_sysctl_table
354parport_default_sysctl_table = {
355 NULL,
356 {
357 { DEV_PARPORT_DEFAULT_TIMESLICE, "timeslice",
358 &parport_default_timeslice,
359 sizeof(parport_default_timeslice), 0644, NULL,
360 &proc_doulongvec_ms_jiffies_minmax, NULL, NULL,
361 (void*) &parport_min_timeslice_value,
362 (void*) &parport_max_timeslice_value },
363 { DEV_PARPORT_DEFAULT_SPINTIME, "spintime",
364 &parport_default_spintime,
365 sizeof(parport_default_spintime), 0644, NULL,
366 &proc_dointvec_minmax, NULL, NULL,
367 (void*) &parport_min_spintime_value,
368 (void*) &parport_max_spintime_value },
369 {0}
370 },
371 { { DEV_PARPORT_DEFAULT, "default", NULL, 0, 0555,
372 parport_default_sysctl_table.vars },{0}},
373 {
374 PARPORT_PARPORT_DIR(parport_default_sysctl_table.default_dir),
375 {0}},
376 { PARPORT_DEV_DIR(parport_default_sysctl_table.parport_dir), {0}}
377};
378
379
380int parport_proc_register(struct parport *port)
381{
382 struct parport_sysctl_table *t;
383 int i;
384
385 t = kmalloc(sizeof(*t), GFP_KERNEL);
386 if (t == NULL)
387 return -ENOMEM;
388 memcpy(t, &parport_sysctl_template, sizeof(*t));
389
390 t->device_dir[0].extra1 = port;
391
392 for (i = 0; i < 8; i++)
393 t->vars[i].extra1 = port;
394
395 t->vars[0].data = &port->spintime;
396 t->vars[5].child = t->device_dir;
397
398 for (i = 0; i < 5; i++)
399 t->vars[6 + i].extra2 = &port->probe_info[i];
400
401 t->port_dir[0].procname = port->name;
402 t->port_dir[0].ctl_name = port->number + 1; /* nb 0 isn't legal here */
403
404 t->port_dir[0].child = t->vars;
405 t->parport_dir[0].child = t->port_dir;
406 t->dev_dir[0].child = t->parport_dir;
407
408 t->sysctl_header = register_sysctl_table(t->dev_dir, 0);
409 if (t->sysctl_header == NULL) {
410 kfree(t);
411 t = NULL;
412 }
413 port->sysctl_table = t;
414 return 0;
415}
416
417int parport_proc_unregister(struct parport *port)
418{
419 if (port->sysctl_table) {
420 struct parport_sysctl_table *t = port->sysctl_table;
421 port->sysctl_table = NULL;
422 unregister_sysctl_table(t->sysctl_header);
423 kfree(t);
424 }
425 return 0;
426}
427
428int parport_device_proc_register(struct pardevice *device)
429{
430 struct parport_device_sysctl_table *t;
431 struct parport * port = device->port;
432
433 t = kmalloc(sizeof(*t), GFP_KERNEL);
434 if (t == NULL)
435 return -ENOMEM;
436 memcpy(t, &parport_device_sysctl_template, sizeof(*t));
437
438 t->dev_dir[0].child = t->parport_dir;
439 t->parport_dir[0].child = t->port_dir;
440 t->port_dir[0].procname = port->name;
441 t->port_dir[0].ctl_name = port->number + 1; /* nb 0 isn't legal here */
442 t->port_dir[0].child = t->devices_root_dir;
443 t->devices_root_dir[0].child = t->device_dir;
444
445#ifdef CONFIG_PARPORT_1284
446
447 t->device_dir[0].ctl_name =
448 parport_device_num(port->number, port->muxport,
449 device->daisy)
450 + 1; /* nb 0 isn't legal here */
451
452#else /* No IEEE 1284 support */
453
454 /* parport_device_num isn't available. */
455 t->device_dir[0].ctl_name = 1;
456
457#endif /* IEEE 1284 support or not */
458
459 t->device_dir[0].procname = device->name;
460 t->device_dir[0].extra1 = device;
461 t->device_dir[0].child = t->vars;
462 t->vars[0].data = &device->timeslice;
463
464 t->sysctl_header = register_sysctl_table(t->dev_dir, 0);
465 if (t->sysctl_header == NULL) {
466 kfree(t);
467 t = NULL;
468 }
469 device->sysctl_table = t;
470 return 0;
471}
472
473int parport_device_proc_unregister(struct pardevice *device)
474{
475 if (device->sysctl_table) {
476 struct parport_device_sysctl_table *t = device->sysctl_table;
477 device->sysctl_table = NULL;
478 unregister_sysctl_table(t->sysctl_header);
479 kfree(t);
480 }
481 return 0;
482}
483
484static int __init parport_default_proc_register(void)
485{
486 parport_default_sysctl_table.sysctl_header =
487 register_sysctl_table(parport_default_sysctl_table.dev_dir, 0);
488 return 0;
489}
490
491static void __exit parport_default_proc_unregister(void)
492{
493 if (parport_default_sysctl_table.sysctl_header) {
494 unregister_sysctl_table(parport_default_sysctl_table.
495 sysctl_header);
496 parport_default_sysctl_table.sysctl_header = NULL;
497 }
498}
499
500#else /* no sysctl or no procfs*/
501
502int parport_proc_register(struct parport *pp)
503{
504 return 0;
505}
506
507int parport_proc_unregister(struct parport *pp)
508{
509 return 0;
510}
511
512int parport_device_proc_register(struct pardevice *device)
513{
514 return 0;
515}
516
517int parport_device_proc_unregister(struct pardevice *device)
518{
519 return 0;
520}
521
522static int __init parport_default_proc_register (void)
523{
524 return 0;
525}
526
527static void __exit parport_default_proc_unregister (void)
528{
529}
530#endif
531
532module_init(parport_default_proc_register)
533module_exit(parport_default_proc_unregister)
diff --git a/drivers/parport/share.c b/drivers/parport/share.c
new file mode 100644
index 000000000000..ae7becf7efa5
--- /dev/null
+++ b/drivers/parport/share.c
@@ -0,0 +1,1014 @@
1/* $Id: parport_share.c,v 1.15 1998/01/11 12:06:17 philip Exp $
2 * Parallel-port resource manager code.
3 *
4 * Authors: David Campbell <campbell@tirian.che.curtin.edu.au>
5 * Tim Waugh <tim@cyberelk.demon.co.uk>
6 * Jose Renau <renau@acm.org>
7 * Philip Blundell <philb@gnu.org>
8 * Andrea Arcangeli
9 *
10 * based on work by Grant Guenther <grant@torque.net>
11 * and Philip Blundell
12 *
13 * Any part of this program may be used in documents licensed under
14 * the GNU Free Documentation License, Version 1.1 or any later version
15 * published by the Free Software Foundation.
16 */
17
18#undef PARPORT_DEBUG_SHARING /* undef for production */
19
20#include <linux/config.h>
21#include <linux/module.h>
22#include <linux/string.h>
23#include <linux/threads.h>
24#include <linux/parport.h>
25#include <linux/delay.h>
26#include <linux/errno.h>
27#include <linux/interrupt.h>
28#include <linux/ioport.h>
29#include <linux/kernel.h>
30#include <linux/slab.h>
31#include <linux/sched.h>
32#include <linux/kmod.h>
33
34#include <linux/spinlock.h>
35#include <asm/irq.h>
36
37#undef PARPORT_PARANOID
38
39#define PARPORT_DEFAULT_TIMESLICE (HZ/5)
40
41unsigned long parport_default_timeslice = PARPORT_DEFAULT_TIMESLICE;
42int parport_default_spintime = DEFAULT_SPIN_TIME;
43
44static LIST_HEAD(portlist);
45static DEFINE_SPINLOCK(parportlist_lock);
46
47/* list of all allocated ports, sorted by ->number */
48static LIST_HEAD(all_ports);
49static DEFINE_SPINLOCK(full_list_lock);
50
51static LIST_HEAD(drivers);
52
53static DECLARE_MUTEX(registration_lock);
54
55/* What you can do to a port that's gone away.. */
56static void dead_write_lines (struct parport *p, unsigned char b){}
57static unsigned char dead_read_lines (struct parport *p) { return 0; }
58static unsigned char dead_frob_lines (struct parport *p, unsigned char b,
59 unsigned char c) { return 0; }
60static void dead_onearg (struct parport *p){}
61static void dead_initstate (struct pardevice *d, struct parport_state *s) { }
62static void dead_state (struct parport *p, struct parport_state *s) { }
63static size_t dead_write (struct parport *p, const void *b, size_t l, int f)
64{ return 0; }
65static size_t dead_read (struct parport *p, void *b, size_t l, int f)
66{ return 0; }
67static struct parport_operations dead_ops = {
68 .write_data = dead_write_lines, /* data */
69 .read_data = dead_read_lines,
70
71 .write_control = dead_write_lines, /* control */
72 .read_control = dead_read_lines,
73 .frob_control = dead_frob_lines,
74
75 .read_status = dead_read_lines, /* status */
76
77 .enable_irq = dead_onearg, /* enable_irq */
78 .disable_irq = dead_onearg, /* disable_irq */
79
80 .data_forward = dead_onearg, /* data_forward */
81 .data_reverse = dead_onearg, /* data_reverse */
82
83 .init_state = dead_initstate, /* init_state */
84 .save_state = dead_state,
85 .restore_state = dead_state,
86
87 .epp_write_data = dead_write, /* epp */
88 .epp_read_data = dead_read,
89 .epp_write_addr = dead_write,
90 .epp_read_addr = dead_read,
91
92 .ecp_write_data = dead_write, /* ecp */
93 .ecp_read_data = dead_read,
94 .ecp_write_addr = dead_write,
95
96 .compat_write_data = dead_write, /* compat */
97 .nibble_read_data = dead_read, /* nibble */
98 .byte_read_data = dead_read, /* byte */
99
100 .owner = NULL,
101};
102
103/* Call attach(port) for each registered driver. */
104static void attach_driver_chain(struct parport *port)
105{
106 /* caller has exclusive registration_lock */
107 struct parport_driver *drv;
108 list_for_each_entry(drv, &drivers, list)
109 drv->attach(port);
110}
111
112/* Call detach(port) for each registered driver. */
113static void detach_driver_chain(struct parport *port)
114{
115 struct parport_driver *drv;
116 /* caller has exclusive registration_lock */
117 list_for_each_entry(drv, &drivers, list)
118 drv->detach (port);
119}
120
121/* Ask kmod for some lowlevel drivers. */
122static void get_lowlevel_driver (void)
123{
124 /* There is no actual module called this: you should set
125 * up an alias for modutils. */
126 request_module ("parport_lowlevel");
127}
128
129/**
130 * parport_register_driver - register a parallel port device driver
131 * @drv: structure describing the driver
132 *
133 * This can be called by a parallel port device driver in order
134 * to receive notifications about ports being found in the
135 * system, as well as ports no longer available.
136 *
137 * The @drv structure is allocated by the caller and must not be
138 * deallocated until after calling parport_unregister_driver().
139 *
140 * The driver's attach() function may block. The port that
141 * attach() is given will be valid for the duration of the
142 * callback, but if the driver wants to take a copy of the
143 * pointer it must call parport_get_port() to do so. Calling
144 * parport_register_device() on that port will do this for you.
145 *
146 * The driver's detach() function may block. The port that
147 * detach() is given will be valid for the duration of the
148 * callback, but if the driver wants to take a copy of the
149 * pointer it must call parport_get_port() to do so.
150 *
151 * Returns 0 on success. Currently it always succeeds.
152 **/
153
154int parport_register_driver (struct parport_driver *drv)
155{
156 struct parport *port;
157
158 if (list_empty(&portlist))
159 get_lowlevel_driver ();
160
161 down(&registration_lock);
162 list_for_each_entry(port, &portlist, list)
163 drv->attach(port);
164 list_add(&drv->list, &drivers);
165 up(&registration_lock);
166
167 return 0;
168}
169
170/**
171 * parport_unregister_driver - deregister a parallel port device driver
172 * @drv: structure describing the driver that was given to
173 * parport_register_driver()
174 *
175 * This should be called by a parallel port device driver that
176 * has registered itself using parport_register_driver() when it
177 * is about to be unloaded.
178 *
179 * When it returns, the driver's attach() routine will no longer
180 * be called, and for each port that attach() was called for, the
181 * detach() routine will have been called.
182 *
183 * All the driver's attach() and detach() calls are guaranteed to have
184 * finished by the time this function returns.
185 **/
186
187void parport_unregister_driver (struct parport_driver *drv)
188{
189 struct parport *port;
190
191 down(&registration_lock);
192 list_del_init(&drv->list);
193 list_for_each_entry(port, &portlist, list)
194 drv->detach(port);
195 up(&registration_lock);
196}
197
198static void free_port (struct parport *port)
199{
200 int d;
201 spin_lock(&full_list_lock);
202 list_del(&port->full_list);
203 spin_unlock(&full_list_lock);
204 for (d = 0; d < 5; d++) {
205 if (port->probe_info[d].class_name)
206 kfree (port->probe_info[d].class_name);
207 if (port->probe_info[d].mfr)
208 kfree (port->probe_info[d].mfr);
209 if (port->probe_info[d].model)
210 kfree (port->probe_info[d].model);
211 if (port->probe_info[d].cmdset)
212 kfree (port->probe_info[d].cmdset);
213 if (port->probe_info[d].description)
214 kfree (port->probe_info[d].description);
215 }
216
217 kfree(port->name);
218 kfree(port);
219}
220
221/**
222 * parport_get_port - increment a port's reference count
223 * @port: the port
224 *
225 * This ensure's that a struct parport pointer remains valid
226 * until the matching parport_put_port() call.
227 **/
228
229struct parport *parport_get_port (struct parport *port)
230{
231 atomic_inc (&port->ref_count);
232 return port;
233}
234
235/**
236 * parport_put_port - decrement a port's reference count
237 * @port: the port
238 *
239 * This should be called once for each call to parport_get_port(),
240 * once the port is no longer needed.
241 **/
242
243void parport_put_port (struct parport *port)
244{
245 if (atomic_dec_and_test (&port->ref_count))
246 /* Can destroy it now. */
247 free_port (port);
248
249 return;
250}
251
252/**
253 * parport_register_port - register a parallel port
254 * @base: base I/O address
255 * @irq: IRQ line
256 * @dma: DMA channel
257 * @ops: pointer to the port driver's port operations structure
258 *
259 * When a parallel port (lowlevel) driver finds a port that
260 * should be made available to parallel port device drivers, it
261 * should call parport_register_port(). The @base, @irq, and
262 * @dma parameters are for the convenience of port drivers, and
263 * for ports where they aren't meaningful needn't be set to
264 * anything special. They can be altered afterwards by adjusting
265 * the relevant members of the parport structure that is returned
266 * and represents the port. They should not be tampered with
267 * after calling parport_announce_port, however.
268 *
269 * If there are parallel port device drivers in the system that
270 * have registered themselves using parport_register_driver(),
271 * they are not told about the port at this time; that is done by
272 * parport_announce_port().
273 *
274 * The @ops structure is allocated by the caller, and must not be
275 * deallocated before calling parport_remove_port().
276 *
277 * If there is no memory to allocate a new parport structure,
278 * this function will return %NULL.
279 **/
280
281struct parport *parport_register_port(unsigned long base, int irq, int dma,
282 struct parport_operations *ops)
283{
284 struct list_head *l;
285 struct parport *tmp;
286 int num;
287 int device;
288 char *name;
289
290 tmp = kmalloc(sizeof(struct parport), GFP_KERNEL);
291 if (!tmp) {
292 printk(KERN_WARNING "parport: memory squeeze\n");
293 return NULL;
294 }
295
296 /* Init our structure */
297 memset(tmp, 0, sizeof(struct parport));
298 tmp->base = base;
299 tmp->irq = irq;
300 tmp->dma = dma;
301 tmp->muxport = tmp->daisy = tmp->muxsel = -1;
302 tmp->modes = 0;
303 INIT_LIST_HEAD(&tmp->list);
304 tmp->devices = tmp->cad = NULL;
305 tmp->flags = 0;
306 tmp->ops = ops;
307 tmp->physport = tmp;
308 memset (tmp->probe_info, 0, 5 * sizeof (struct parport_device_info));
309 rwlock_init(&tmp->cad_lock);
310 spin_lock_init(&tmp->waitlist_lock);
311 spin_lock_init(&tmp->pardevice_lock);
312 tmp->ieee1284.mode = IEEE1284_MODE_COMPAT;
313 tmp->ieee1284.phase = IEEE1284_PH_FWD_IDLE;
314 init_MUTEX_LOCKED (&tmp->ieee1284.irq); /* actually a semaphore at 0 */
315 tmp->spintime = parport_default_spintime;
316 atomic_set (&tmp->ref_count, 1);
317 INIT_LIST_HEAD(&tmp->full_list);
318
319 name = kmalloc(15, GFP_KERNEL);
320 if (!name) {
321 printk(KERN_ERR "parport: memory squeeze\n");
322 kfree(tmp);
323 return NULL;
324 }
325 /* Search for the lowest free parport number. */
326
327 spin_lock(&full_list_lock);
328 for (l = all_ports.next, num = 0; l != &all_ports; l = l->next, num++) {
329 struct parport *p = list_entry(l, struct parport, full_list);
330 if (p->number != num)
331 break;
332 }
333 tmp->portnum = tmp->number = num;
334 list_add_tail(&tmp->full_list, l);
335 spin_unlock(&full_list_lock);
336
337 /*
338 * Now that the portnum is known finish doing the Init.
339 */
340 sprintf(name, "parport%d", tmp->portnum = tmp->number);
341 tmp->name = name;
342
343 for (device = 0; device < 5; device++)
344 /* assume the worst */
345 tmp->probe_info[device].class = PARPORT_CLASS_LEGACY;
346
347 tmp->waithead = tmp->waittail = NULL;
348
349 return tmp;
350}
351
352/**
353 * parport_announce_port - tell device drivers about a parallel port
354 * @port: parallel port to announce
355 *
356 * After a port driver has registered a parallel port with
357 * parport_register_port, and performed any necessary
358 * initialisation or adjustments, it should call
359 * parport_announce_port() in order to notify all device drivers
360 * that have called parport_register_driver(). Their attach()
361 * functions will be called, with @port as the parameter.
362 **/
363
364void parport_announce_port (struct parport *port)
365{
366 int i;
367
368#ifdef CONFIG_PARPORT_1284
369 /* Analyse the IEEE1284.3 topology of the port. */
370 parport_daisy_init(port);
371#endif
372
373 parport_proc_register(port);
374 down(&registration_lock);
375 spin_lock_irq(&parportlist_lock);
376 list_add_tail(&port->list, &portlist);
377 for (i = 1; i < 3; i++) {
378 struct parport *slave = port->slaves[i-1];
379 if (slave)
380 list_add_tail(&slave->list, &portlist);
381 }
382 spin_unlock_irq(&parportlist_lock);
383
384 /* Let drivers know that new port(s) has arrived. */
385 attach_driver_chain (port);
386 for (i = 1; i < 3; i++) {
387 struct parport *slave = port->slaves[i-1];
388 if (slave)
389 attach_driver_chain(slave);
390 }
391 up(&registration_lock);
392}
393
394/**
395 * parport_remove_port - deregister a parallel port
396 * @port: parallel port to deregister
397 *
398 * When a parallel port driver is forcibly unloaded, or a
399 * parallel port becomes inaccessible, the port driver must call
400 * this function in order to deal with device drivers that still
401 * want to use it.
402 *
403 * The parport structure associated with the port has its
404 * operations structure replaced with one containing 'null'
405 * operations that return errors or just don't do anything.
406 *
407 * Any drivers that have registered themselves using
408 * parport_register_driver() are notified that the port is no
409 * longer accessible by having their detach() routines called
410 * with @port as the parameter.
411 **/
412
413void parport_remove_port(struct parport *port)
414{
415 int i;
416
417 down(&registration_lock);
418
419 /* Spread the word. */
420 detach_driver_chain (port);
421
422#ifdef CONFIG_PARPORT_1284
423 /* Forget the IEEE1284.3 topology of the port. */
424 parport_daisy_fini(port);
425 for (i = 1; i < 3; i++) {
426 struct parport *slave = port->slaves[i-1];
427 if (!slave)
428 continue;
429 detach_driver_chain(slave);
430 parport_daisy_fini(slave);
431 }
432#endif
433
434 port->ops = &dead_ops;
435 spin_lock(&parportlist_lock);
436 list_del_init(&port->list);
437 for (i = 1; i < 3; i++) {
438 struct parport *slave = port->slaves[i-1];
439 if (slave)
440 list_del_init(&slave->list);
441 }
442 spin_unlock(&parportlist_lock);
443
444 up(&registration_lock);
445
446 parport_proc_unregister(port);
447
448 for (i = 1; i < 3; i++) {
449 struct parport *slave = port->slaves[i-1];
450 if (slave)
451 parport_put_port(slave);
452 }
453}
454
455/**
456 * parport_register_device - register a device on a parallel port
457 * @port: port to which the device is attached
458 * @name: a name to refer to the device
459 * @pf: preemption callback
460 * @kf: kick callback (wake-up)
461 * @irq_func: interrupt handler
462 * @flags: registration flags
463 * @handle: data for callback functions
464 *
465 * This function, called by parallel port device drivers,
466 * declares that a device is connected to a port, and tells the
467 * system all it needs to know.
468 *
469 * The @name is allocated by the caller and must not be
470 * deallocated until the caller calls @parport_unregister_device
471 * for that device.
472 *
473 * The preemption callback function, @pf, is called when this
474 * device driver has claimed access to the port but another
475 * device driver wants to use it. It is given @handle as its
476 * parameter, and should return zero if it is willing for the
477 * system to release the port to another driver on its behalf.
478 * If it wants to keep control of the port it should return
479 * non-zero, and no action will be taken. It is good manners for
480 * the driver to try to release the port at the earliest
481 * opportunity after its preemption callback rejects a preemption
482 * attempt. Note that if a preemption callback is happy for
483 * preemption to go ahead, there is no need to release the port;
484 * it is done automatically. This function may not block, as it
485 * may be called from interrupt context. If the device driver
486 * does not support preemption, @pf can be %NULL.
487 *
488 * The wake-up ("kick") callback function, @kf, is called when
489 * the port is available to be claimed for exclusive access; that
490 * is, parport_claim() is guaranteed to succeed when called from
491 * inside the wake-up callback function. If the driver wants to
492 * claim the port it should do so; otherwise, it need not take
493 * any action. This function may not block, as it may be called
494 * from interrupt context. If the device driver does not want to
495 * be explicitly invited to claim the port in this way, @kf can
496 * be %NULL.
497 *
498 * The interrupt handler, @irq_func, is called when an interrupt
499 * arrives from the parallel port. Note that if a device driver
500 * wants to use interrupts it should use parport_enable_irq(),
501 * and can also check the irq member of the parport structure
502 * representing the port.
503 *
504 * The parallel port (lowlevel) driver is the one that has called
505 * request_irq() and whose interrupt handler is called first.
506 * This handler does whatever needs to be done to the hardware to
507 * acknowledge the interrupt (for PC-style ports there is nothing
508 * special to be done). It then tells the IEEE 1284 code about
509 * the interrupt, which may involve reacting to an IEEE 1284
510 * event depending on the current IEEE 1284 phase. After this,
511 * it calls @irq_func. Needless to say, @irq_func will be called
512 * from interrupt context, and may not block.
513 *
514 * The %PARPORT_DEV_EXCL flag is for preventing port sharing, and
515 * so should only be used when sharing the port with other device
516 * drivers is impossible and would lead to incorrect behaviour.
517 * Use it sparingly! Normally, @flags will be zero.
518 *
519 * This function returns a pointer to a structure that represents
520 * the device on the port, or %NULL if there is not enough memory
521 * to allocate space for that structure.
522 **/
523
524struct pardevice *
525parport_register_device(struct parport *port, const char *name,
526 int (*pf)(void *), void (*kf)(void *),
527 void (*irq_func)(int, void *, struct pt_regs *),
528 int flags, void *handle)
529{
530 struct pardevice *tmp;
531
532 if (port->physport->flags & PARPORT_FLAG_EXCL) {
533 /* An exclusive device is registered. */
534 printk (KERN_DEBUG "%s: no more devices allowed\n",
535 port->name);
536 return NULL;
537 }
538
539 if (flags & PARPORT_DEV_LURK) {
540 if (!pf || !kf) {
541 printk(KERN_INFO "%s: refused to register lurking device (%s) without callbacks\n", port->name, name);
542 return NULL;
543 }
544 }
545
546 /* We up our own module reference count, and that of the port
547 on which a device is to be registered, to ensure that
548 neither of us gets unloaded while we sleep in (e.g.)
549 kmalloc.
550 */
551 if (!try_module_get(port->ops->owner)) {
552 return NULL;
553 }
554
555 parport_get_port (port);
556
557 tmp = kmalloc(sizeof(struct pardevice), GFP_KERNEL);
558 if (tmp == NULL) {
559 printk(KERN_WARNING "%s: memory squeeze, couldn't register %s.\n", port->name, name);
560 goto out;
561 }
562
563 tmp->state = kmalloc(sizeof(struct parport_state), GFP_KERNEL);
564 if (tmp->state == NULL) {
565 printk(KERN_WARNING "%s: memory squeeze, couldn't register %s.\n", port->name, name);
566 goto out_free_pardevice;
567 }
568
569 tmp->name = name;
570 tmp->port = port;
571 tmp->daisy = -1;
572 tmp->preempt = pf;
573 tmp->wakeup = kf;
574 tmp->private = handle;
575 tmp->flags = flags;
576 tmp->irq_func = irq_func;
577 tmp->waiting = 0;
578 tmp->timeout = 5 * HZ;
579
580 /* Chain this onto the list */
581 tmp->prev = NULL;
582 /*
583 * This function must not run from an irq handler so we don' t need
584 * to clear irq on the local CPU. -arca
585 */
586 spin_lock(&port->physport->pardevice_lock);
587
588 if (flags & PARPORT_DEV_EXCL) {
589 if (port->physport->devices) {
590 spin_unlock (&port->physport->pardevice_lock);
591 printk (KERN_DEBUG
592 "%s: cannot grant exclusive access for "
593 "device %s\n", port->name, name);
594 goto out_free_all;
595 }
596 port->flags |= PARPORT_FLAG_EXCL;
597 }
598
599 tmp->next = port->physport->devices;
600 wmb(); /* Make sure that tmp->next is written before it's
601 added to the list; see comments marked 'no locking
602 required' */
603 if (port->physport->devices)
604 port->physport->devices->prev = tmp;
605 port->physport->devices = tmp;
606 spin_unlock(&port->physport->pardevice_lock);
607
608 init_waitqueue_head(&tmp->wait_q);
609 tmp->timeslice = parport_default_timeslice;
610 tmp->waitnext = tmp->waitprev = NULL;
611
612 /*
613 * This has to be run as last thing since init_state may need other
614 * pardevice fields. -arca
615 */
616 port->ops->init_state(tmp, tmp->state);
617 parport_device_proc_register(tmp);
618 return tmp;
619
620 out_free_all:
621 kfree (tmp->state);
622 out_free_pardevice:
623 kfree (tmp);
624 out:
625 parport_put_port (port);
626 module_put(port->ops->owner);
627
628 return NULL;
629}
630
631/**
632 * parport_unregister_device - deregister a device on a parallel port
633 * @dev: pointer to structure representing device
634 *
635 * This undoes the effect of parport_register_device().
636 **/
637
638void parport_unregister_device(struct pardevice *dev)
639{
640 struct parport *port;
641
642#ifdef PARPORT_PARANOID
643 if (dev == NULL) {
644 printk(KERN_ERR "parport_unregister_device: passed NULL\n");
645 return;
646 }
647#endif
648
649 parport_device_proc_unregister(dev);
650
651 port = dev->port->physport;
652
653 if (port->cad == dev) {
654 printk(KERN_DEBUG "%s: %s forgot to release port\n",
655 port->name, dev->name);
656 parport_release (dev);
657 }
658
659 spin_lock(&port->pardevice_lock);
660 if (dev->next)
661 dev->next->prev = dev->prev;
662 if (dev->prev)
663 dev->prev->next = dev->next;
664 else
665 port->devices = dev->next;
666
667 if (dev->flags & PARPORT_DEV_EXCL)
668 port->flags &= ~PARPORT_FLAG_EXCL;
669
670 spin_unlock(&port->pardevice_lock);
671
672 /* Make sure we haven't left any pointers around in the wait
673 * list. */
674 spin_lock (&port->waitlist_lock);
675 if (dev->waitprev || dev->waitnext || port->waithead == dev) {
676 if (dev->waitprev)
677 dev->waitprev->waitnext = dev->waitnext;
678 else
679 port->waithead = dev->waitnext;
680 if (dev->waitnext)
681 dev->waitnext->waitprev = dev->waitprev;
682 else
683 port->waittail = dev->waitprev;
684 }
685 spin_unlock (&port->waitlist_lock);
686
687 kfree(dev->state);
688 kfree(dev);
689
690 module_put(port->ops->owner);
691 parport_put_port (port);
692}
693
694/**
695 * parport_find_number - find a parallel port by number
696 * @number: parallel port number
697 *
698 * This returns the parallel port with the specified number, or
699 * %NULL if there is none.
700 *
701 * There is an implicit parport_get_port() done already; to throw
702 * away the reference to the port that parport_find_number()
703 * gives you, use parport_put_port().
704 */
705
706struct parport *parport_find_number (int number)
707{
708 struct parport *port, *result = NULL;
709
710 if (list_empty(&portlist))
711 get_lowlevel_driver ();
712
713 spin_lock (&parportlist_lock);
714 list_for_each_entry(port, &portlist, list) {
715 if (port->number == number) {
716 result = parport_get_port (port);
717 break;
718 }
719 }
720 spin_unlock (&parportlist_lock);
721 return result;
722}
723
724/**
725 * parport_find_base - find a parallel port by base address
726 * @base: base I/O address
727 *
728 * This returns the parallel port with the specified base
729 * address, or %NULL if there is none.
730 *
731 * There is an implicit parport_get_port() done already; to throw
732 * away the reference to the port that parport_find_base()
733 * gives you, use parport_put_port().
734 */
735
736struct parport *parport_find_base (unsigned long base)
737{
738 struct parport *port, *result = NULL;
739
740 if (list_empty(&portlist))
741 get_lowlevel_driver ();
742
743 spin_lock (&parportlist_lock);
744 list_for_each_entry(port, &portlist, list) {
745 if (port->base == base) {
746 result = parport_get_port (port);
747 break;
748 }
749 }
750 spin_unlock (&parportlist_lock);
751 return result;
752}
753
754/**
755 * parport_claim - claim access to a parallel port device
756 * @dev: pointer to structure representing a device on the port
757 *
758 * This function will not block and so can be used from interrupt
759 * context. If parport_claim() succeeds in claiming access to
760 * the port it returns zero and the port is available to use. It
761 * may fail (returning non-zero) if the port is in use by another
762 * driver and that driver is not willing to relinquish control of
763 * the port.
764 **/
765
766int parport_claim(struct pardevice *dev)
767{
768 struct pardevice *oldcad;
769 struct parport *port = dev->port->physport;
770 unsigned long flags;
771
772 if (port->cad == dev) {
773 printk(KERN_INFO "%s: %s already owner\n",
774 dev->port->name,dev->name);
775 return 0;
776 }
777
778 /* Preempt any current device */
779 write_lock_irqsave (&port->cad_lock, flags);
780 if ((oldcad = port->cad) != NULL) {
781 if (oldcad->preempt) {
782 if (oldcad->preempt(oldcad->private))
783 goto blocked;
784 port->ops->save_state(port, dev->state);
785 } else
786 goto blocked;
787
788 if (port->cad != oldcad) {
789 /* I think we'll actually deadlock rather than
790 get here, but just in case.. */
791 printk(KERN_WARNING
792 "%s: %s released port when preempted!\n",
793 port->name, oldcad->name);
794 if (port->cad)
795 goto blocked;
796 }
797 }
798
799 /* Can't fail from now on, so mark ourselves as no longer waiting. */
800 if (dev->waiting & 1) {
801 dev->waiting = 0;
802
803 /* Take ourselves out of the wait list again. */
804 spin_lock_irq (&port->waitlist_lock);
805 if (dev->waitprev)
806 dev->waitprev->waitnext = dev->waitnext;
807 else
808 port->waithead = dev->waitnext;
809 if (dev->waitnext)
810 dev->waitnext->waitprev = dev->waitprev;
811 else
812 port->waittail = dev->waitprev;
813 spin_unlock_irq (&port->waitlist_lock);
814 dev->waitprev = dev->waitnext = NULL;
815 }
816
817 /* Now we do the change of devices */
818 port->cad = dev;
819
820#ifdef CONFIG_PARPORT_1284
821 /* If it's a mux port, select it. */
822 if (dev->port->muxport >= 0) {
823 /* FIXME */
824 port->muxsel = dev->port->muxport;
825 }
826
827 /* If it's a daisy chain device, select it. */
828 if (dev->daisy >= 0) {
829 /* This could be lazier. */
830 if (!parport_daisy_select (port, dev->daisy,
831 IEEE1284_MODE_COMPAT))
832 port->daisy = dev->daisy;
833 }
834#endif /* IEEE1284.3 support */
835
836 /* Restore control registers */
837 port->ops->restore_state(port, dev->state);
838 write_unlock_irqrestore(&port->cad_lock, flags);
839 dev->time = jiffies;
840 return 0;
841
842blocked:
843 /* If this is the first time we tried to claim the port, register an
844 interest. This is only allowed for devices sleeping in
845 parport_claim_or_block(), or those with a wakeup function. */
846
847 /* The cad_lock is still held for writing here */
848 if (dev->waiting & 2 || dev->wakeup) {
849 spin_lock (&port->waitlist_lock);
850 if (test_and_set_bit(0, &dev->waiting) == 0) {
851 /* First add ourselves to the end of the wait list. */
852 dev->waitnext = NULL;
853 dev->waitprev = port->waittail;
854 if (port->waittail) {
855 port->waittail->waitnext = dev;
856 port->waittail = dev;
857 } else
858 port->waithead = port->waittail = dev;
859 }
860 spin_unlock (&port->waitlist_lock);
861 }
862 write_unlock_irqrestore (&port->cad_lock, flags);
863 return -EAGAIN;
864}
865
866/**
867 * parport_claim_or_block - claim access to a parallel port device
868 * @dev: pointer to structure representing a device on the port
869 *
870 * This behaves like parport_claim(), but will block if necessary
871 * to wait for the port to be free. A return value of 1
872 * indicates that it slept; 0 means that it succeeded without
873 * needing to sleep. A negative error code indicates failure.
874 **/
875
876int parport_claim_or_block(struct pardevice *dev)
877{
878 int r;
879
880 /* Signal to parport_claim() that we can wait even without a
881 wakeup function. */
882 dev->waiting = 2;
883
884 /* Try to claim the port. If this fails, we need to sleep. */
885 r = parport_claim(dev);
886 if (r == -EAGAIN) {
887#ifdef PARPORT_DEBUG_SHARING
888 printk(KERN_DEBUG "%s: parport_claim() returned -EAGAIN\n", dev->name);
889#endif
890 /*
891 * FIXME!!! Use the proper locking for dev->waiting,
892 * and make this use the "wait_event_interruptible()"
893 * interfaces. The cli/sti that used to be here
894 * did nothing.
895 *
896 * See also parport_release()
897 */
898
899 /* If dev->waiting is clear now, an interrupt
900 gave us the port and we would deadlock if we slept. */
901 if (dev->waiting) {
902 interruptible_sleep_on (&dev->wait_q);
903 if (signal_pending (current)) {
904 return -EINTR;
905 }
906 r = 1;
907 } else {
908 r = 0;
909#ifdef PARPORT_DEBUG_SHARING
910 printk(KERN_DEBUG "%s: didn't sleep in parport_claim_or_block()\n",
911 dev->name);
912#endif
913 }
914
915#ifdef PARPORT_DEBUG_SHARING
916 if (dev->port->physport->cad != dev)
917 printk(KERN_DEBUG "%s: exiting parport_claim_or_block "
918 "but %s owns port!\n", dev->name,
919 dev->port->physport->cad ?
920 dev->port->physport->cad->name:"nobody");
921#endif
922 }
923 dev->waiting = 0;
924 return r;
925}
926
927/**
928 * parport_release - give up access to a parallel port device
929 * @dev: pointer to structure representing parallel port device
930 *
931 * This function cannot fail, but it should not be called without
932 * the port claimed. Similarly, if the port is already claimed
933 * you should not try claiming it again.
934 **/
935
936void parport_release(struct pardevice *dev)
937{
938 struct parport *port = dev->port->physport;
939 struct pardevice *pd;
940 unsigned long flags;
941
942 /* Make sure that dev is the current device */
943 write_lock_irqsave(&port->cad_lock, flags);
944 if (port->cad != dev) {
945 write_unlock_irqrestore (&port->cad_lock, flags);
946 printk(KERN_WARNING "%s: %s tried to release parport "
947 "when not owner\n", port->name, dev->name);
948 return;
949 }
950
951#ifdef CONFIG_PARPORT_1284
952 /* If this is on a mux port, deselect it. */
953 if (dev->port->muxport >= 0) {
954 /* FIXME */
955 port->muxsel = -1;
956 }
957
958 /* If this is a daisy device, deselect it. */
959 if (dev->daisy >= 0) {
960 parport_daisy_deselect_all (port);
961 port->daisy = -1;
962 }
963#endif
964
965 port->cad = NULL;
966 write_unlock_irqrestore(&port->cad_lock, flags);
967
968 /* Save control registers */
969 port->ops->save_state(port, dev->state);
970
971 /* If anybody is waiting, find out who's been there longest and
972 then wake them up. (Note: no locking required) */
973 /* !!! LOCKING IS NEEDED HERE */
974 for (pd = port->waithead; pd; pd = pd->waitnext) {
975 if (pd->waiting & 2) { /* sleeping in claim_or_block */
976 parport_claim(pd);
977 if (waitqueue_active(&pd->wait_q))
978 wake_up_interruptible(&pd->wait_q);
979 return;
980 } else if (pd->wakeup) {
981 pd->wakeup(pd->private);
982 if (dev->port->cad) /* racy but no matter */
983 return;
984 } else {
985 printk(KERN_ERR "%s: don't know how to wake %s\n", port->name, pd->name);
986 }
987 }
988
989 /* Nobody was waiting, so walk the list to see if anyone is
990 interested in being woken up. (Note: no locking required) */
991 /* !!! LOCKING IS NEEDED HERE */
992 for (pd = port->devices; (port->cad == NULL) && pd; pd = pd->next) {
993 if (pd->wakeup && pd != dev)
994 pd->wakeup(pd->private);
995 }
996}
997
998/* Exported symbols for modules. */
999
1000EXPORT_SYMBOL(parport_claim);
1001EXPORT_SYMBOL(parport_claim_or_block);
1002EXPORT_SYMBOL(parport_release);
1003EXPORT_SYMBOL(parport_register_port);
1004EXPORT_SYMBOL(parport_announce_port);
1005EXPORT_SYMBOL(parport_remove_port);
1006EXPORT_SYMBOL(parport_register_driver);
1007EXPORT_SYMBOL(parport_unregister_driver);
1008EXPORT_SYMBOL(parport_register_device);
1009EXPORT_SYMBOL(parport_unregister_device);
1010EXPORT_SYMBOL(parport_put_port);
1011EXPORT_SYMBOL(parport_find_number);
1012EXPORT_SYMBOL(parport_find_base);
1013
1014MODULE_LICENSE("GPL");
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-11 19:43:29 -0500