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authorJiri Slaby <jirislaby@gmail.com>2009-09-19 16:13:14 -0400
committerLive-CD User <linux@linux.site>2009-09-19 16:13:14 -0400
commitebdb513596c0eb1dcb3bad8f53865964a2207ca9 (patch)
treefcd3b533f80fbd65483574d35ec84f4c3d59edf6 /drivers/char
parent23342262964722b41c7d06cfadc215039e48881b (diff)
cyclades: overall cleanup
- remove changelog from the file. we don't care about ancient history - update copyright year - update version - constify some stuff - empty lines removal - unused variables and macros removal - remove some asm/ includes, they are sucked by linux/ variants Signed-off-by: Jiri Slaby <jirislaby@gmail.com> Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/char')
-rw-r--r--drivers/char/cyclades.c598
1 files changed, 12 insertions, 586 deletions
diff --git a/drivers/char/cyclades.c b/drivers/char/cyclades.c
index 87a40bc75646..3884ea439935 100644
--- a/drivers/char/cyclades.c
+++ b/drivers/char/cyclades.c
@@ -11,7 +11,7 @@
11 * Initially written by Randolph Bentson <bentson@grieg.seaslug.org>. 11 * Initially written by Randolph Bentson <bentson@grieg.seaslug.org>.
12 * Modified and maintained by Marcio Saito <marcio@cyclades.com>. 12 * Modified and maintained by Marcio Saito <marcio@cyclades.com>.
13 * 13 *
14 * Copyright (C) 2007 Jiri Slaby <jirislaby@gmail.com> 14 * Copyright (C) 2007-2009 Jiri Slaby <jirislaby@gmail.com>
15 * 15 *
16 * Much of the design and some of the code came from serial.c 16 * Much of the design and some of the code came from serial.c
17 * which was copyright (C) 1991, 1992 Linus Torvalds. It was 17 * which was copyright (C) 1991, 1992 Linus Torvalds. It was
@@ -19,577 +19,9 @@
19 * and then fixed as suggested by Michael K. Johnson 12/12/92. 19 * and then fixed as suggested by Michael K. Johnson 12/12/92.
20 * Converted to pci probing and cleaned up by Jiri Slaby. 20 * Converted to pci probing and cleaned up by Jiri Slaby.
21 * 21 *
22 * This version supports shared IRQ's (only for PCI boards).
23 *
24 * Prevent users from opening non-existing Z ports.
25 *
26 * Revision 2.3.2.8 2000/07/06 18:14:16 ivan
27 * Fixed the PCI detection function to work properly on Alpha systems.
28 * Implemented support for TIOCSERGETLSR ioctl.
29 * Implemented full support for non-standard baud rates.
30 *
31 * Revision 2.3.2.7 2000/06/01 18:26:34 ivan
32 * Request PLX I/O region, although driver doesn't use it, to avoid
33 * problems with other drivers accessing it.
34 * Removed count for on-board buffer characters in cy_chars_in_buffer
35 * (Cyclades-Z only).
36 *
37 * Revision 2.3.2.6 2000/05/05 13:56:05 ivan
38 * Driver now reports physical instead of virtual memory addresses.
39 * Masks were added to some Cyclades-Z read accesses.
40 * Implemented workaround for PLX9050 bug that would cause a system lockup
41 * in certain systems, depending on the MMIO addresses allocated to the
42 * board.
43 * Changed the Tx interrupt programming in the CD1400 chips to boost up
44 * performance (Cyclom-Y only).
45 * Code is now compliant with the new module interface (module_[init|exit]).
46 * Make use of the PCI helper functions to access PCI resources.
47 * Did some code "housekeeping".
48 *
49 * Revision 2.3.2.5 2000/01/19 14:35:33 ivan
50 * Fixed bug in cy_set_termios on CRTSCTS flag turnoff.
51 *
52 * Revision 2.3.2.4 2000/01/17 09:19:40 ivan
53 * Fixed SMP locking in Cyclom-Y interrupt handler.
54 *
55 * Revision 2.3.2.3 1999/12/28 12:11:39 ivan
56 * Added a new cyclades_card field called nports to allow the driver to
57 * know the exact number of ports found by the Z firmware after its load;
58 * RX buffer contention prevention logic on interrupt op mode revisited
59 * (Cyclades-Z only);
60 * Revisited printk's for Z debug;
61 * Driver now makes sure that the constant SERIAL_XMIT_SIZE is defined;
62 *
63 * Revision 2.3.2.2 1999/10/01 11:27:43 ivan
64 * Fixed bug in cyz_poll that would make all ports but port 0
65 * unable to transmit/receive data (Cyclades-Z only);
66 * Implemented logic to prevent the RX buffer from being stuck with data
67 * due to a driver / firmware race condition in interrupt op mode
68 * (Cyclades-Z only);
69 * Fixed bug in block_til_ready logic that would lead to a system crash;
70 * Revisited cy_close spinlock usage;
71 *
72 * Revision 2.3.2.1 1999/09/28 11:01:22 ivan
73 * Revisited CONFIG_PCI conditional compilation for PCI board support;
74 * Implemented TIOCGICOUNT and TIOCMIWAIT ioctl support;
75 * _Major_ cleanup on the Cyclades-Z interrupt support code / logic;
76 * Removed CTS handling from the driver -- this is now completely handled
77 * by the firmware (Cyclades-Z only);
78 * Flush RX on-board buffers on a port open (Cyclades-Z only);
79 * Fixed handling of ASYNC_SPD_* TTY flags;
80 * Module unload now unmaps all memory area allocated by ioremap;
81 *
82 * Revision 2.3.1.1 1999/07/15 16:45:53 ivan
83 * Removed CY_PROC conditional compilation;
84 * Implemented SMP-awareness for the driver;
85 * Implemented a new ISA IRQ autoprobe that uses the irq_probe_[on|off]
86 * functions;
87 * The driver now accepts memory addresses (maddr=0xMMMMM) and IRQs
88 * (irq=NN) as parameters (only for ISA boards);
89 * Fixed bug in set_line_char that would prevent the Cyclades-Z
90 * ports from being configured at speeds above 115.2Kbps;
91 * Fixed bug in cy_set_termios that would prevent XON/XOFF flow control
92 * switching from working properly;
93 * The driver now only prints IRQ info for the Cyclades-Z if it's
94 * configured to work in interrupt mode;
95 *
96 * Revision 2.2.2.3 1999/06/28 11:13:29 ivan
97 * Added support for interrupt mode operation for the Z cards;
98 * Removed the driver inactivity control for the Z;
99 * Added a missing MOD_DEC_USE_COUNT in the cy_open function for when
100 * the Z firmware is not loaded yet;
101 * Replaced the "manual" Z Tx flush buffer by a call to a FW command of
102 * same functionality;
103 * Implemented workaround for IRQ setting loss on the PCI configuration
104 * registers after a PCI bridge EEPROM reload (affects PLX9060 only);
105 *
106 * Revision 2.2.2.2 1999/05/14 17:18:15 ivan
107 * /proc entry location changed to /proc/tty/driver/cyclades;
108 * Added support to shared IRQ's (only for PCI boards);
109 * Added support for Cobalt Qube2 systems;
110 * IRQ [de]allocation scheme revisited;
111 * BREAK implementation changed in order to make use of the 'break_ctl'
112 * TTY facility;
113 * Fixed typo in TTY structure field 'driver_name';
114 * Included a PCI bridge reset and EEPROM reload in the board
115 * initialization code (for both Y and Z series).
116 *
117 * Revision 2.2.2.1 1999/04/08 16:17:43 ivan
118 * Fixed a bug in cy_wait_until_sent that was preventing the port to be
119 * closed properly after a SIGINT;
120 * Module usage counter scheme revisited;
121 * Added support to the upcoming Y PCI boards (i.e., support to additional
122 * PCI Device ID's).
123 *
124 * Revision 2.2.1.10 1999/01/20 16:14:29 ivan
125 * Removed all unnecessary page-alignement operations in ioremap calls
126 * (ioremap is currently safe for these operations).
127 *
128 * Revision 2.2.1.9 1998/12/30 18:18:30 ivan
129 * Changed access to PLX PCI bridge registers from I/O to MMIO, in
130 * order to make PLX9050-based boards work with certain motherboards.
131 *
132 * Revision 2.2.1.8 1998/11/13 12:46:20 ivan
133 * cy_close function now resets (correctly) the tty->closing flag;
134 * JIFFIES_DIFF macro fixed.
135 *
136 * Revision 2.2.1.7 1998/09/03 12:07:28 ivan
137 * Fixed bug in cy_close function, which was not informing HW of
138 * which port should have the reception disabled before doing so;
139 * fixed Cyclom-8YoP hardware detection bug.
140 *
141 * Revision 2.2.1.6 1998/08/20 17:15:39 ivan
142 * Fixed bug in cy_close function, which causes malfunction
143 * of one of the first 4 ports when a higher port is closed
144 * (Cyclom-Y only).
145 *
146 * Revision 2.2.1.5 1998/08/10 18:10:28 ivan
147 * Fixed Cyclom-4Yo hardware detection bug.
148 *
149 * Revision 2.2.1.4 1998/08/04 11:02:50 ivan
150 * /proc/cyclades implementation with great collaboration of
151 * Marc Lewis <marc@blarg.net>;
152 * cyy_interrupt was changed to avoid occurrence of kernel oopses
153 * during PPP operation.
154 *
155 * Revision 2.2.1.3 1998/06/01 12:09:10 ivan
156 * General code review in order to comply with 2.1 kernel standards;
157 * data loss prevention for slow devices revisited (cy_wait_until_sent
158 * was created);
159 * removed conditional compilation for new/old PCI structure support
160 * (now the driver only supports the new PCI structure).
161 *
162 * Revision 2.2.1.1 1998/03/19 16:43:12 ivan
163 * added conditional compilation for new/old PCI structure support;
164 * removed kernel series (2.0.x / 2.1.x) conditional compilation.
165 *
166 * Revision 2.1.1.3 1998/03/16 18:01:12 ivan
167 * cleaned up the data loss fix;
168 * fixed XON/XOFF handling once more (Cyclades-Z);
169 * general review of the driver routines;
170 * introduction of a mechanism to prevent data loss with slow
171 * printers, by forcing a delay before closing the port.
172 *
173 * Revision 2.1.1.2 1998/02/17 16:50:00 ivan
174 * fixed detection/handling of new CD1400 in Ye boards;
175 * fixed XON/XOFF handling (Cyclades-Z);
176 * fixed data loss caused by a premature port close;
177 * introduction of a flag that holds the CD1400 version ID per port
178 * (used by the CYGETCD1400VER new ioctl).
179 *
180 * Revision 2.1.1.1 1997/12/03 17:31:19 ivan
181 * Code review for the module cleanup routine;
182 * fixed RTS and DTR status report for new CD1400's in get_modem_info;
183 * includes anonymous changes regarding signal_pending.
184 *
185 * Revision 2.1 1997/11/01 17:42:41 ivan
186 * Changes in the driver to support Alpha systems (except 8Zo V_1);
187 * BREAK fix for the Cyclades-Z boards;
188 * driver inactivity control by FW implemented;
189 * introduction of flag that allows driver to take advantage of
190 * a special CD1400 feature related to HW flow control;
191 * added support for the CD1400 rev. J (Cyclom-Y boards);
192 * introduction of ioctls to:
193 * - control the rtsdtr_inv flag (Cyclom-Y);
194 * - control the rflow flag (Cyclom-Y);
195 * - adjust the polling interval (Cyclades-Z);
196 *
197 * Revision 1.36.4.33 1997/06/27 19:00:00 ivan
198 * Fixes related to kernel version conditional
199 * compilation.
200 *
201 * Revision 1.36.4.32 1997/06/14 19:30:00 ivan
202 * Compatibility issues between kernels 2.0.x and
203 * 2.1.x (mainly related to clear_bit function).
204 *
205 * Revision 1.36.4.31 1997/06/03 15:30:00 ivan
206 * Changes to define the memory window according to the
207 * board type.
208 *
209 * Revision 1.36.4.30 1997/05/16 15:30:00 daniel
210 * Changes to support new cycladesZ boards.
211 *
212 * Revision 1.36.4.29 1997/05/12 11:30:00 daniel
213 * Merge of Bentson's and Daniel's version 1.36.4.28.
214 * Corrects bug in cy_detect_pci: check if there are more
215 * ports than the number of static structs allocated.
216 * Warning message during initialization if this driver is
217 * used with the new generation of cycladesZ boards. Those
218 * will be supported only in next release of the driver.
219 * Corrects bug in cy_detect_pci and cy_detect_isa that
220 * returned wrong number of VALID boards, when a cyclomY
221 * was found with no serial modules connected.
222 * Changes to use current (2.1.x) kernel subroutine names
223 * and created macros for compilation with 2.0.x kernel,
224 * instead of the other way around.
225 *
226 * Revision 1.36.4.28 1997/05/?? ??:00:00 bentson
227 * Change queue_task_irq_off to queue_task_irq.
228 * The inline function queue_task_irq_off (tqueue.h)
229 * was removed from latest releases of 2.1.x kernel.
230 * Use of macro __init to mark the initialization
231 * routines, so memory can be reused.
232 * Also incorporate implementation of critical region
233 * in function cleanup_module() created by anonymous
234 * linuxer.
235 *
236 * Revision 1.36.4.28 1997/04/25 16:00:00 daniel
237 * Change to support new firmware that solves DCD problem:
238 * application could fail to receive SIGHUP signal when DCD
239 * varying too fast.
240 *
241 * Revision 1.36.4.27 1997/03/26 10:30:00 daniel
242 * Changed for support linux versions 2.1.X.
243 * Backward compatible with linux versions 2.0.X.
244 * Corrected illegal use of filler field in
245 * CH_CTRL struct.
246 * Deleted some debug messages.
247 *
248 * Revision 1.36.4.26 1997/02/27 12:00:00 daniel
249 * Included check for NULL tty pointer in cyz_poll.
250 *
251 * Revision 1.36.4.25 1997/02/26 16:28:30 bentson
252 * Bill Foster at Blarg! Online services noticed that
253 * some of the switch elements of -Z modem control
254 * lacked a closing "break;"
255 *
256 * Revision 1.36.4.24 1997/02/24 11:00:00 daniel
257 * Changed low water threshold for buffer xmit_buf
258 *
259 * Revision 1.36.4.23 1996/12/02 21:50:16 bentson
260 * Marcio provided fix to modem status fetch for -Z
261 *
262 * Revision 1.36.4.22 1996/10/28 22:41:17 bentson
263 * improve mapping of -Z control page (thanks to Steve
264 * Price <stevep@fa.tdktca.com> for help on this)
265 *
266 * Revision 1.36.4.21 1996/09/10 17:00:10 bentson
267 * shift from CPU-bound to memcopy in cyz_polling operation
268 *
269 * Revision 1.36.4.20 1996/09/09 18:30:32 Bentson
270 * Added support to set and report higher speeds.
271 *
272 * Revision 1.36.4.19c 1996/08/09 10:00:00 Marcio Saito
273 * Some fixes in the HW flow control for the BETA release.
274 * Don't try to register the IRQ.
275 *
276 * Revision 1.36.4.19 1996/08/08 16:23:18 Bentson
277 * make sure "cyc" appears in all kernel messages; all soft interrupts
278 * handled by same routine; recognize out-of-band reception; comment
279 * out some diagnostic messages; leave RTS/CTS flow control to hardware;
280 * fix race condition in -Z buffer management; only -Y needs to explicitly
281 * flush chars; tidy up some startup messages;
282 *
283 * Revision 1.36.4.18 1996/07/25 18:57:31 bentson
284 * shift MOD_INC_USE_COUNT location to match
285 * serial.c; purge some diagnostic messages;
286 *
287 * Revision 1.36.4.17 1996/07/25 18:01:08 bentson
288 * enable modem status messages and fetch & process them; note
289 * time of last activity type for each port; set_line_char now
290 * supports more than line 0 and treats 0 baud correctly;
291 * get_modem_info senses rs_status;
292 *
293 * Revision 1.36.4.16 1996/07/20 08:43:15 bentson
294 * barely works--now's time to turn on
295 * more features 'til it breaks
296 *
297 * Revision 1.36.4.15 1996/07/19 22:30:06 bentson
298 * check more -Z board status; shorten boot message
299 *
300 * Revision 1.36.4.14 1996/07/19 22:20:37 bentson
301 * fix reference to ch_ctrl in startup; verify return
302 * values from cyz_issue_cmd and cyz_update_channel;
303 * more stuff to get modem control correct;
304 *
305 * Revision 1.36.4.13 1996/07/11 19:53:33 bentson
306 * more -Z stuff folded in; re-order changes to put -Z stuff
307 * after -Y stuff (to make changes clearer)
308 *
309 * Revision 1.36.4.12 1996/07/11 15:40:55 bentson
310 * Add code to poll Cyclades-Z. Add code to get & set RS-232 control.
311 * Add code to send break. Clear firmware ID word at startup (so
312 * that other code won't talk to inactive board).
313 *
314 * Revision 1.36.4.11 1996/07/09 05:28:29 bentson
315 * add code for -Z in set_line_char
316 *
317 * Revision 1.36.4.10 1996/07/08 19:28:37 bentson
318 * fold more -Z stuff (or in some cases, error messages)
319 * into driver; add text to "don't know what to do" messages.
320 *
321 * Revision 1.36.4.9 1996/07/08 18:38:38 bentson
322 * moved compile-time flags near top of file; cosmetic changes
323 * to narrow text (to allow 2-up printing); changed many declarations
324 * to "static" to limit external symbols; shuffled code order to
325 * coalesce -Y and -Z specific code, also to put internal functions
326 * in order of tty_driver structure; added code to recognize -Z
327 * ports (and for moment, do nothing or report error); add cy_startup
328 * to parse boot command line for extra base addresses for ISA probes;
329 *
330 * Revision 1.36.4.8 1996/06/25 17:40:19 bentson
331 * reorder some code, fix types of some vars (int vs. long),
332 * add cy_setup to support user declared ISA addresses
333 *
334 * Revision 1.36.4.7 1996/06/21 23:06:18 bentson
335 * dump ioctl based firmware load (it's now a user level
336 * program); ensure uninitialzed ports cannot be used
337 *
338 * Revision 1.36.4.6 1996/06/20 23:17:19 bentson
339 * rename vars and restructure some code
340 *
341 * Revision 1.36.4.5 1996/06/14 15:09:44 bentson
342 * get right status back after boot load
343 *
344 * Revision 1.36.4.4 1996/06/13 19:51:44 bentson
345 * successfully loads firmware
346 *
347 * Revision 1.36.4.3 1996/06/13 06:08:33 bentson
348 * add more of the code for the boot/load ioctls
349 *
350 * Revision 1.36.4.2 1996/06/11 21:00:51 bentson
351 * start to add Z functionality--starting with ioctl
352 * for loading firmware
353 *
354 * Revision 1.36.4.1 1996/06/10 18:03:02 bentson
355 * added code to recognize Z/PCI card at initialization; report
356 * presence, but card is not initialized (because firmware needs
357 * to be loaded)
358 *
359 * Revision 1.36.3.8 1996/06/07 16:29:00 bentson
360 * starting minor number at zero; added missing verify_area
361 * as noted by Heiko Eißfeldt <heiko@colossus.escape.de>
362 *
363 * Revision 1.36.3.7 1996/04/19 21:06:18 bentson
364 * remove unneeded boot message & fix CLOCAL hardware flow
365 * control (Miquel van Smoorenburg <miquels@Q.cistron.nl>);
366 * remove unused diagnostic statements; minor 0 is first;
367 *
368 * Revision 1.36.3.6 1996/03/13 13:21:17 marcio
369 * The kernel function vremap (available only in later 1.3.xx kernels)
370 * allows the access to memory addresses above the RAM. This revision
371 * of the driver supports PCI boards below 1Mb (device id 0x100) and
372 * above 1Mb (device id 0x101).
373 *
374 * Revision 1.36.3.5 1996/03/07 15:20:17 bentson
375 * Some global changes to interrupt handling spilled into
376 * this driver--mostly unused arguments in system function
377 * calls. Also added change by Marcio Saito which should
378 * reduce lost interrupts at startup by fast processors.
379 *
380 * Revision 1.36.3.4 1995/11/13 20:45:10 bentson
381 * Changes by Corey Minyard <minyard@wf-rch.cirr.com> distributed
382 * in 1.3.41 kernel to remove a possible race condition, extend
383 * some error messages, and let the driver run as a loadable module
384 * Change by Alan Wendt <alan@ez0.ezlink.com> to remove a
385 * possible race condition.
386 * Change by Marcio Saito <marcio@cyclades.com> to fix PCI addressing.
387 *
388 * Revision 1.36.3.3 1995/11/13 19:44:48 bentson
389 * Changes by Linus Torvalds in 1.3.33 kernel distribution
390 * required due to reordering of driver initialization.
391 * Drivers are now initialized *after* memory management.
392 *
393 * Revision 1.36.3.2 1995/09/08 22:07:14 bentson
394 * remove printk from ISR; fix typo
395 *
396 * Revision 1.36.3.1 1995/09/01 12:00:42 marcio
397 * Minor fixes in the PCI board support. PCI function calls in
398 * conditional compilation (CONFIG_PCI). Thanks to Jim Duncan
399 * <duncan@okay.com>. "bad serial count" message removed.
400 *
401 * Revision 1.36.3 1995/08/22 09:19:42 marcio
402 * Cyclom-Y/PCI support added. Changes in the cy_init routine and
403 * board initialization. Changes in the boot messages. The driver
404 * supports up to 4 boards and 64 ports by default.
405 *
406 * Revision 1.36.1.4 1995/03/29 06:14:14 bentson
407 * disambiguate between Cyclom-16Y and Cyclom-32Ye;
408 *
409 * Revision 1.36.1.3 1995/03/23 22:15:35 bentson
410 * add missing break in modem control block in ioctl switch statement
411 * (discovered by Michael Edward Chastain <mec@jobe.shell.portal.com>);
412 *
413 * Revision 1.36.1.2 1995/03/22 19:16:22 bentson
414 * make sure CTS flow control is set as soon as possible (thanks
415 * to note from David Lambert <lambert@chesapeake.rps.slb.com>);
416 *
417 * Revision 1.36.1.1 1995/03/13 15:44:43 bentson
418 * initialize defaults for receive threshold and stale data timeout;
419 * cosmetic changes;
420 *
421 * Revision 1.36 1995/03/10 23:33:53 bentson
422 * added support of chips 4-7 in 32 port Cyclom-Ye;
423 * fix cy_interrupt pointer dereference problem
424 * (Joe Portman <baron@aa.net>);
425 * give better error response if open is attempted on non-existent port
426 * (Zachariah Vaum <jchryslr@netcom.com>);
427 * correct command timeout (Kenneth Lerman <lerman@@seltd.newnet.com>);
428 * conditional compilation for -16Y on systems with fast, noisy bus;
429 * comment out diagnostic print function;
430 * cleaned up table of base addresses;
431 * set receiver time-out period register to correct value,
432 * set receive threshold to better default values,
433 * set chip timer to more accurate 200 Hz ticking,
434 * add code to monitor and modify receive parameters
435 * (Rik Faith <faith@cs.unc.edu> Nick Simicich
436 * <njs@scifi.emi.net>);
437 *
438 * Revision 1.35 1994/12/16 13:54:18 steffen
439 * additional patch by Marcio Saito for board detection
440 * Accidently left out in 1.34
441 *
442 * Revision 1.34 1994/12/10 12:37:12 steffen
443 * This is the corrected version as suggested by Marcio Saito
444 *
445 * Revision 1.33 1994/12/01 22:41:18 bentson
446 * add hooks to support more high speeds directly; add tytso
447 * patch regarding CLOCAL wakeups
448 *
449 * Revision 1.32 1994/11/23 19:50:04 bentson
450 * allow direct kernel control of higher signalling rates;
451 * look for cards at additional locations
452 *
453 * Revision 1.31 1994/11/16 04:33:28 bentson
454 * ANOTHER fix from Corey Minyard, minyard@wf-rch.cirr.com--
455 * a problem in chars_in_buffer has been resolved by some
456 * small changes; this should yield smoother output
457 *
458 * Revision 1.30 1994/11/16 04:28:05 bentson
459 * Fix from Corey Minyard, Internet: minyard@metronet.com,
460 * UUCP: minyard@wf-rch.cirr.com, WORK: minyardbnr.ca, to
461 * cy_hangup that appears to clear up much (all?) of the
462 * DTR glitches; also he's added/cleaned-up diagnostic messages
463 *
464 * Revision 1.29 1994/11/16 04:16:07 bentson
465 * add change proposed by Ralph Sims, ralphs@halcyon.com, to
466 * operate higher speeds in same way as other serial ports;
467 * add more serial ports (for up to two 16-port muxes).
468 *
469 * Revision 1.28 1994/11/04 00:13:16 root
470 * turn off diagnostic messages
471 *
472 * Revision 1.27 1994/11/03 23:46:37 root
473 * bunch of changes to bring driver into greater conformance
474 * with the serial.c driver (looking for missed fixes)
475 *
476 * Revision 1.26 1994/11/03 22:40:36 root
477 * automatic interrupt probing fixed.
478 *
479 * Revision 1.25 1994/11/03 20:17:02 root
480 * start to implement auto-irq
481 *
482 * Revision 1.24 1994/11/03 18:01:55 root
483 * still working on modem signals--trying not to drop DTR
484 * during the getty/login processes
485 *
486 * Revision 1.23 1994/11/03 17:51:36 root
487 * extend baud rate support; set receive threshold as function
488 * of baud rate; fix some problems with RTS/CTS;
489 *
490 * Revision 1.22 1994/11/02 18:05:35 root
491 * changed arguments to udelay to type long to get
492 * delays to be of correct duration
493 *
494 * Revision 1.21 1994/11/02 17:37:30 root
495 * employ udelay (after calibrating loops_per_second earlier
496 * in init/main.c) instead of using home-grown delay routines
497 *
498 * Revision 1.20 1994/11/02 03:11:38 root
499 * cy_chars_in_buffer forces a return value of 0 to let
500 * login work (don't know why it does); some functions
501 * that were returning EFAULT, now executes the code;
502 * more work on deciding when to disable xmit interrupts;
503 *
504 * Revision 1.19 1994/11/01 20:10:14 root
505 * define routine to start transmission interrupts (by enabling
506 * transmit interrupts); directly enable/disable modem interrupts;
507 *
508 * Revision 1.18 1994/11/01 18:40:45 bentson
509 * Don't always enable transmit interrupts in startup; interrupt on
510 * TxMpty instead of TxRdy to help characters get out before shutdown;
511 * restructure xmit interrupt to check for chars first and quit if
512 * none are ready to go; modem status (MXVRx) is upright, _not_ inverted
513 * (to my view);
514 *
515 * Revision 1.17 1994/10/30 04:39:45 bentson
516 * rename serial_driver and callout_driver to cy_serial_driver and
517 * cy_callout_driver to avoid linkage interference; initialize
518 * info->type to PORT_CIRRUS; ruggedize paranoia test; elide ->port
519 * from cyclades_port structure; add paranoia check to cy_close;
520 *
521 * Revision 1.16 1994/10/30 01:14:33 bentson
522 * change major numbers; add some _early_ return statements;
523 *
524 * Revision 1.15 1994/10/29 06:43:15 bentson
525 * final tidying up for clean compile; enable some error reporting
526 *
527 * Revision 1.14 1994/10/28 20:30:22 Bentson
528 * lots of changes to drag the driver towards the new tty_io
529 * structures and operation. not expected to work, but may
530 * compile cleanly.
531 *
532 * Revision 1.13 1994/07/21 23:08:57 Bentson
533 * add some diagnostic cruft; support 24 lines (for testing
534 * both -8Y and -16Y cards; be more thorough in servicing all
535 * chips during interrupt; add "volatile" a few places to
536 * circumvent compiler optimizations; fix base & offset
537 * computations in block_til_ready (was causing chip 0 to
538 * stop operation)
539 *
540 * Revision 1.12 1994/07/19 16:42:11 Bentson
541 * add some hackery for kernel version 1.1.8; expand
542 * error messages; refine timing for delay loops and
543 * declare loop params volatile
544 *
545 * Revision 1.11 1994/06/11 21:53:10 bentson
546 * get use of save_car right in transmit interrupt service
547 *
548 * Revision 1.10.1.1 1994/06/11 21:31:18 bentson
549 * add some diagnostic printing; try to fix save_car stuff
550 *
551 * Revision 1.10 1994/06/11 20:36:08 bentson
552 * clean up compiler warnings
553 *
554 * Revision 1.9 1994/06/11 19:42:46 bentson
555 * added a bunch of code to support modem signalling
556 *
557 * Revision 1.8 1994/06/11 17:57:07 bentson
558 * recognize break & parity error
559 *
560 * Revision 1.7 1994/06/05 05:51:34 bentson
561 * Reorder baud table to be monotonic; add cli to CP; discard
562 * incoming characters and status if the line isn't open; start to
563 * fold code into cy_throttle; start to port get_serial_info,
564 * set_serial_info, get_modem_info, set_modem_info, and send_break
565 * from serial.c; expand cy_ioctl; relocate and expand config_setup;
566 * get flow control characters from tty struct; invalidate ports w/o
567 * hardware;
568 *
569 * Revision 1.6 1994/05/31 18:42:21 bentson
570 * add a loop-breaker in the interrupt service routine;
571 * note when port is initialized so that it can be shut
572 * down under the right conditions; receive works without
573 * any obvious errors
574 *
575 * Revision 1.5 1994/05/30 00:55:02 bentson
576 * transmit works without obvious errors
577 *
578 * Revision 1.4 1994/05/27 18:46:27 bentson
579 * incorporated more code from lib_y.c; can now print short
580 * strings under interrupt control to port zero; seems to
581 * select ports/channels/lines correctly
582 *
583 * Revision 1.3 1994/05/25 22:12:44 bentson
584 * shifting from multi-port on a card to proper multiplexor
585 * data structures; added skeletons of most routines
586 *
587 * Revision 1.2 1994/05/19 13:21:43 bentson
588 * start to crib from other sources
589 *
590 */ 22 */
591 23
592#define CY_VERSION "2.5" 24#define CY_VERSION "2.6"
593 25
594/* If you need to install more boards than NR_CARDS, change the constant 26/* If you need to install more boards than NR_CARDS, change the constant
595 in the definition below. No other change is necessary to support up to 27 in the definition below. No other change is necessary to support up to
@@ -648,9 +80,7 @@
648#include <linux/firmware.h> 80#include <linux/firmware.h>
649#include <linux/device.h> 81#include <linux/device.h>
650 82
651#include <asm/system.h>
652#include <linux/io.h> 83#include <linux/io.h>
653#include <asm/irq.h>
654#include <linux/uaccess.h> 84#include <linux/uaccess.h>
655 85
656#include <linux/kernel.h> 86#include <linux/kernel.h>
@@ -666,7 +96,6 @@ static void cy_send_xchar(struct tty_struct *tty, char ch);
666#ifndef SERIAL_XMIT_SIZE 96#ifndef SERIAL_XMIT_SIZE
667#define SERIAL_XMIT_SIZE (min(PAGE_SIZE, 4096)) 97#define SERIAL_XMIT_SIZE (min(PAGE_SIZE, 4096))
668#endif 98#endif
669#define WAKEUP_CHARS 256
670 99
671#define STD_COM_FLAGS (0) 100#define STD_COM_FLAGS (0)
672 101
@@ -756,25 +185,25 @@ static int cy_next_channel; /* next minor available */
756 * HI VHI 185 * HI VHI
757 * 20 186 * 20
758 */ 187 */
759static int baud_table[] = { 188static const int baud_table[] = {
760 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, 189 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200,
761 1800, 2400, 4800, 9600, 19200, 38400, 57600, 76800, 115200, 150000, 190 1800, 2400, 4800, 9600, 19200, 38400, 57600, 76800, 115200, 150000,
762 230400, 0 191 230400, 0
763}; 192};
764 193
765static char baud_co_25[] = { /* 25 MHz clock option table */ 194static const char baud_co_25[] = { /* 25 MHz clock option table */
766 /* value => 00 01 02 03 04 */ 195 /* value => 00 01 02 03 04 */
767 /* divide by 8 32 128 512 2048 */ 196 /* divide by 8 32 128 512 2048 */
768 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03, 0x03, 0x02, 197 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03, 0x03, 0x02,
769 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 198 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
770}; 199};
771 200
772static char baud_bpr_25[] = { /* 25 MHz baud rate period table */ 201static const char baud_bpr_25[] = { /* 25 MHz baud rate period table */
773 0x00, 0xf5, 0xa3, 0x6f, 0x5c, 0x51, 0xf5, 0xa3, 0x51, 0xa3, 202 0x00, 0xf5, 0xa3, 0x6f, 0x5c, 0x51, 0xf5, 0xa3, 0x51, 0xa3,
774 0x6d, 0x51, 0xa3, 0x51, 0xa3, 0x51, 0x36, 0x29, 0x1b, 0x15 203 0x6d, 0x51, 0xa3, 0x51, 0xa3, 0x51, 0x36, 0x29, 0x1b, 0x15
775}; 204};
776 205
777static char baud_co_60[] = { /* 60 MHz clock option table (CD1400 J) */ 206static const char baud_co_60[] = { /* 60 MHz clock option table (CD1400 J) */
778 /* value => 00 01 02 03 04 */ 207 /* value => 00 01 02 03 04 */
779 /* divide by 8 32 128 512 2048 */ 208 /* divide by 8 32 128 512 2048 */
780 0x00, 0x00, 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03, 209 0x00, 0x00, 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03,
@@ -782,13 +211,13 @@ static char baud_co_60[] = { /* 60 MHz clock option table (CD1400 J) */
782 0x00 211 0x00
783}; 212};
784 213
785static char baud_bpr_60[] = { /* 60 MHz baud rate period table (CD1400 J) */ 214static const char baud_bpr_60[] = { /* 60 MHz baud rate period table (CD1400 J) */
786 0x00, 0x82, 0x21, 0xff, 0xdb, 0xc3, 0x92, 0x62, 0xc3, 0x62, 215 0x00, 0x82, 0x21, 0xff, 0xdb, 0xc3, 0x92, 0x62, 0xc3, 0x62,
787 0x41, 0xc3, 0x62, 0xc3, 0x62, 0xc3, 0x82, 0x62, 0x41, 0x32, 216 0x41, 0xc3, 0x62, 0xc3, 0x62, 0xc3, 0x82, 0x62, 0x41, 0x32,
788 0x21 217 0x21
789}; 218};
790 219
791static char baud_cor3[] = { /* receive threshold */ 220static const char baud_cor3[] = { /* receive threshold */
792 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 221 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
793 0x0a, 0x0a, 0x0a, 0x09, 0x09, 0x08, 0x08, 0x08, 0x08, 0x07, 222 0x0a, 0x0a, 0x0a, 0x09, 0x09, 0x08, 0x08, 0x08, 0x08, 0x07,
794 0x07 223 0x07
@@ -805,7 +234,7 @@ static char baud_cor3[] = { /* receive threshold */
805 * cables. 234 * cables.
806 */ 235 */
807 236
808static char rflow_thr[] = { /* rflow threshold */ 237static const char rflow_thr[] = { /* rflow threshold */
809 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 238 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
810 0x00, 0x00, 0x00, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 239 0x00, 0x00, 0x00, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
811 0x0a 240 0x0a
@@ -827,7 +256,7 @@ static const unsigned int cy_chip_offset[] = { 0x0000,
827/* PCI related definitions */ 256/* PCI related definitions */
828 257
829#ifdef CONFIG_PCI 258#ifdef CONFIG_PCI
830static struct pci_device_id cy_pci_dev_id[] __devinitdata = { 259static const struct pci_device_id cy_pci_dev_id[] = {
831 /* PCI < 1Mb */ 260 /* PCI < 1Mb */
832 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Lo) }, 261 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Lo) },
833 /* PCI > 1Mb */ 262 /* PCI > 1Mb */
@@ -893,7 +322,7 @@ static inline bool cyz_is_loaded(struct cyclades_card *card)
893} 322}
894 323
895static inline int serial_paranoia_check(struct cyclades_port *info, 324static inline int serial_paranoia_check(struct cyclades_port *info,
896 char *name, const char *routine) 325 const char *name, const char *routine)
897{ 326{
898#ifdef SERIAL_PARANOIA_CHECK 327#ifdef SERIAL_PARANOIA_CHECK
899 if (!info) { 328 if (!info) {
@@ -909,7 +338,7 @@ static inline int serial_paranoia_check(struct cyclades_port *info,
909 } 338 }
910#endif 339#endif
911 return 0; 340 return 0;
912} /* serial_paranoia_check */ 341}
913 342
914/***********************************************************/ 343/***********************************************************/
915/********* Start of block of Cyclom-Y specific code ********/ 344/********* Start of block of Cyclom-Y specific code ********/
@@ -3030,11 +2459,9 @@ cy_set_serial_info(struct cyclades_port *info, struct tty_struct *tty,
3030 struct serial_struct __user *new_info) 2459 struct serial_struct __user *new_info)
3031{ 2460{
3032 struct serial_struct new_serial; 2461 struct serial_struct new_serial;
3033 struct cyclades_port old_info;
3034 2462
3035 if (copy_from_user(&new_serial, new_info, sizeof(new_serial))) 2463 if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
3036 return -EFAULT; 2464 return -EFAULT;
3037 old_info = *info;
3038 2465
3039 if (!capable(CAP_SYS_ADMIN)) { 2466 if (!capable(CAP_SYS_ADMIN)) {
3040 if (new_serial.close_delay != info->port.close_delay || 2467 if (new_serial.close_delay != info->port.close_delay ||
@@ -3376,7 +2803,6 @@ static int cy_break(struct tty_struct *tty, int break_state)
3376static int get_mon_info(struct cyclades_port *info, 2803static int get_mon_info(struct cyclades_port *info,
3377 struct cyclades_monitor __user *mon) 2804 struct cyclades_monitor __user *mon)
3378{ 2805{
3379
3380 if (copy_to_user(mon, &info->mon, sizeof(struct cyclades_monitor))) 2806 if (copy_to_user(mon, &info->mon, sizeof(struct cyclades_monitor)))
3381 return -EFAULT; 2807 return -EFAULT;
3382 info->mon.int_count = 0; 2808 info->mon.int_count = 0;
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-22 20:57:37 -0500