diff options
author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 18:20:36 -0400 |
---|---|---|
committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 18:20:36 -0400 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/char/epca.c |
Linux-2.6.12-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/char/epca.c')
-rw-r--r-- | drivers/char/epca.c | 3789 |
1 files changed, 3789 insertions, 0 deletions
diff --git a/drivers/char/epca.c b/drivers/char/epca.c new file mode 100644 index 00000000000..6025e1866c7 --- /dev/null +++ b/drivers/char/epca.c | |||
@@ -0,0 +1,3789 @@ | |||
1 | /* | ||
2 | |||
3 | |||
4 | Copyright (C) 1996 Digi International. | ||
5 | |||
6 | For technical support please email digiLinux@dgii.com or | ||
7 | call Digi tech support at (612) 912-3456 | ||
8 | |||
9 | Much of this design and code came from epca.c which was | ||
10 | copyright (C) 1994, 1995 Troy De Jongh, and subsquently | ||
11 | modified by David Nugent, Christoph Lameter, Mike McLagan. | ||
12 | |||
13 | This program is free software; you can redistribute it and/or modify | ||
14 | it under the terms of the GNU General Public License as published by | ||
15 | the Free Software Foundation; either version 2 of the License, or | ||
16 | (at your option) any later version. | ||
17 | |||
18 | This program is distributed in the hope that it will be useful, | ||
19 | but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
20 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
21 | GNU General Public License for more details. | ||
22 | |||
23 | You should have received a copy of the GNU General Public License | ||
24 | along with this program; if not, write to the Free Software | ||
25 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | ||
26 | |||
27 | --------------------------------------------------------------------------- */ | ||
28 | /* See README.epca for change history --DAT*/ | ||
29 | |||
30 | |||
31 | #include <linux/config.h> | ||
32 | #include <linux/module.h> | ||
33 | #include <linux/kernel.h> | ||
34 | #include <linux/types.h> | ||
35 | #include <linux/init.h> | ||
36 | #include <linux/serial.h> | ||
37 | #include <linux/delay.h> | ||
38 | #include <linux/ctype.h> | ||
39 | #include <linux/tty.h> | ||
40 | #include <linux/tty_flip.h> | ||
41 | #include <linux/slab.h> | ||
42 | #include <linux/ioport.h> | ||
43 | #include <linux/interrupt.h> | ||
44 | #include <asm/uaccess.h> | ||
45 | #include <asm/io.h> | ||
46 | |||
47 | #ifdef CONFIG_PCI | ||
48 | #define ENABLE_PCI | ||
49 | #endif /* CONFIG_PCI */ | ||
50 | |||
51 | #define putUser(arg1, arg2) put_user(arg1, (unsigned long __user *)arg2) | ||
52 | #define getUser(arg1, arg2) get_user(arg1, (unsigned __user *)arg2) | ||
53 | |||
54 | #ifdef ENABLE_PCI | ||
55 | #include <linux/pci.h> | ||
56 | #include "digiPCI.h" | ||
57 | #endif /* ENABLE_PCI */ | ||
58 | |||
59 | #include "digi1.h" | ||
60 | #include "digiFep1.h" | ||
61 | #include "epca.h" | ||
62 | #include "epcaconfig.h" | ||
63 | |||
64 | #if BITS_PER_LONG != 32 | ||
65 | # error FIXME: this driver only works on 32-bit platforms | ||
66 | #endif | ||
67 | |||
68 | /* ---------------------- Begin defines ------------------------ */ | ||
69 | |||
70 | #define VERSION "1.3.0.1-LK" | ||
71 | |||
72 | /* This major needs to be submitted to Linux to join the majors list */ | ||
73 | |||
74 | #define DIGIINFOMAJOR 35 /* For Digi specific ioctl */ | ||
75 | |||
76 | |||
77 | #define MAXCARDS 7 | ||
78 | #define epcaassert(x, msg) if (!(x)) epca_error(__LINE__, msg) | ||
79 | |||
80 | #define PFX "epca: " | ||
81 | |||
82 | /* ----------------- Begin global definitions ------------------- */ | ||
83 | |||
84 | static char mesg[100]; | ||
85 | static int nbdevs, num_cards, liloconfig; | ||
86 | static int digi_poller_inhibited = 1 ; | ||
87 | |||
88 | static int setup_error_code; | ||
89 | static int invalid_lilo_config; | ||
90 | |||
91 | /* ----------------------------------------------------------------------- | ||
92 | MAXBOARDS is typically 12, but ISA and EISA cards are restricted to | ||
93 | 7 below. | ||
94 | --------------------------------------------------------------------------*/ | ||
95 | static struct board_info boards[MAXBOARDS]; | ||
96 | |||
97 | |||
98 | /* ------------- Begin structures used for driver registeration ---------- */ | ||
99 | |||
100 | static struct tty_driver *pc_driver; | ||
101 | static struct tty_driver *pc_info; | ||
102 | |||
103 | /* ------------------ Begin Digi specific structures -------------------- */ | ||
104 | |||
105 | /* ------------------------------------------------------------------------ | ||
106 | digi_channels represents an array of structures that keep track of | ||
107 | each channel of the Digi product. Information such as transmit and | ||
108 | receive pointers, termio data, and signal definitions (DTR, CTS, etc ...) | ||
109 | are stored here. This structure is NOT used to overlay the cards | ||
110 | physical channel structure. | ||
111 | -------------------------------------------------------------------------- */ | ||
112 | |||
113 | static struct channel digi_channels[MAX_ALLOC]; | ||
114 | |||
115 | /* ------------------------------------------------------------------------ | ||
116 | card_ptr is an array used to hold the address of the | ||
117 | first channel structure of each card. This array will hold | ||
118 | the addresses of various channels located in digi_channels. | ||
119 | -------------------------------------------------------------------------- */ | ||
120 | static struct channel *card_ptr[MAXCARDS]; | ||
121 | |||
122 | static struct timer_list epca_timer; | ||
123 | |||
124 | /* ---------------------- Begin function prototypes --------------------- */ | ||
125 | |||
126 | /* ---------------------------------------------------------------------- | ||
127 | Begin generic memory functions. These functions will be alias | ||
128 | (point at) more specific functions dependent on the board being | ||
129 | configured. | ||
130 | ----------------------------------------------------------------------- */ | ||
131 | |||
132 | static inline void memwinon(struct board_info *b, unsigned int win); | ||
133 | static inline void memwinoff(struct board_info *b, unsigned int win); | ||
134 | static inline void globalwinon(struct channel *ch); | ||
135 | static inline void rxwinon(struct channel *ch); | ||
136 | static inline void txwinon(struct channel *ch); | ||
137 | static inline void memoff(struct channel *ch); | ||
138 | static inline void assertgwinon(struct channel *ch); | ||
139 | static inline void assertmemoff(struct channel *ch); | ||
140 | |||
141 | /* ---- Begin more 'specific' memory functions for cx_like products --- */ | ||
142 | |||
143 | static inline void pcxem_memwinon(struct board_info *b, unsigned int win); | ||
144 | static inline void pcxem_memwinoff(struct board_info *b, unsigned int win); | ||
145 | static inline void pcxem_globalwinon(struct channel *ch); | ||
146 | static inline void pcxem_rxwinon(struct channel *ch); | ||
147 | static inline void pcxem_txwinon(struct channel *ch); | ||
148 | static inline void pcxem_memoff(struct channel *ch); | ||
149 | |||
150 | /* ------ Begin more 'specific' memory functions for the pcxe ------- */ | ||
151 | |||
152 | static inline void pcxe_memwinon(struct board_info *b, unsigned int win); | ||
153 | static inline void pcxe_memwinoff(struct board_info *b, unsigned int win); | ||
154 | static inline void pcxe_globalwinon(struct channel *ch); | ||
155 | static inline void pcxe_rxwinon(struct channel *ch); | ||
156 | static inline void pcxe_txwinon(struct channel *ch); | ||
157 | static inline void pcxe_memoff(struct channel *ch); | ||
158 | |||
159 | /* ---- Begin more 'specific' memory functions for the pc64xe and pcxi ---- */ | ||
160 | /* Note : pc64xe and pcxi share the same windowing routines */ | ||
161 | |||
162 | static inline void pcxi_memwinon(struct board_info *b, unsigned int win); | ||
163 | static inline void pcxi_memwinoff(struct board_info *b, unsigned int win); | ||
164 | static inline void pcxi_globalwinon(struct channel *ch); | ||
165 | static inline void pcxi_rxwinon(struct channel *ch); | ||
166 | static inline void pcxi_txwinon(struct channel *ch); | ||
167 | static inline void pcxi_memoff(struct channel *ch); | ||
168 | |||
169 | /* - Begin 'specific' do nothing memory functions needed for some cards - */ | ||
170 | |||
171 | static inline void dummy_memwinon(struct board_info *b, unsigned int win); | ||
172 | static inline void dummy_memwinoff(struct board_info *b, unsigned int win); | ||
173 | static inline void dummy_globalwinon(struct channel *ch); | ||
174 | static inline void dummy_rxwinon(struct channel *ch); | ||
175 | static inline void dummy_txwinon(struct channel *ch); | ||
176 | static inline void dummy_memoff(struct channel *ch); | ||
177 | static inline void dummy_assertgwinon(struct channel *ch); | ||
178 | static inline void dummy_assertmemoff(struct channel *ch); | ||
179 | |||
180 | /* ------------------- Begin declare functions ----------------------- */ | ||
181 | |||
182 | static inline struct channel *verifyChannel(register struct tty_struct *); | ||
183 | static inline void pc_sched_event(struct channel *, int); | ||
184 | static void epca_error(int, char *); | ||
185 | static void pc_close(struct tty_struct *, struct file *); | ||
186 | static void shutdown(struct channel *); | ||
187 | static void pc_hangup(struct tty_struct *); | ||
188 | static void pc_put_char(struct tty_struct *, unsigned char); | ||
189 | static int pc_write_room(struct tty_struct *); | ||
190 | static int pc_chars_in_buffer(struct tty_struct *); | ||
191 | static void pc_flush_buffer(struct tty_struct *); | ||
192 | static void pc_flush_chars(struct tty_struct *); | ||
193 | static int block_til_ready(struct tty_struct *, struct file *, | ||
194 | struct channel *); | ||
195 | static int pc_open(struct tty_struct *, struct file *); | ||
196 | static void post_fep_init(unsigned int crd); | ||
197 | static void epcapoll(unsigned long); | ||
198 | static void doevent(int); | ||
199 | static void fepcmd(struct channel *, int, int, int, int, int); | ||
200 | static unsigned termios2digi_h(struct channel *ch, unsigned); | ||
201 | static unsigned termios2digi_i(struct channel *ch, unsigned); | ||
202 | static unsigned termios2digi_c(struct channel *ch, unsigned); | ||
203 | static void epcaparam(struct tty_struct *, struct channel *); | ||
204 | static void receive_data(struct channel *); | ||
205 | static int pc_ioctl(struct tty_struct *, struct file *, | ||
206 | unsigned int, unsigned long); | ||
207 | static int info_ioctl(struct tty_struct *, struct file *, | ||
208 | unsigned int, unsigned long); | ||
209 | static void pc_set_termios(struct tty_struct *, struct termios *); | ||
210 | static void do_softint(void *); | ||
211 | static void pc_stop(struct tty_struct *); | ||
212 | static void pc_start(struct tty_struct *); | ||
213 | static void pc_throttle(struct tty_struct * tty); | ||
214 | static void pc_unthrottle(struct tty_struct *tty); | ||
215 | static void digi_send_break(struct channel *ch, int msec); | ||
216 | static void setup_empty_event(struct tty_struct *tty, struct channel *ch); | ||
217 | void epca_setup(char *, int *); | ||
218 | void console_print(const char *); | ||
219 | |||
220 | static int get_termio(struct tty_struct *, struct termio __user *); | ||
221 | static int pc_write(struct tty_struct *, const unsigned char *, int); | ||
222 | int pc_init(void); | ||
223 | |||
224 | #ifdef ENABLE_PCI | ||
225 | static int init_PCI(void); | ||
226 | #endif /* ENABLE_PCI */ | ||
227 | |||
228 | |||
229 | /* ------------------------------------------------------------------ | ||
230 | Table of functions for each board to handle memory. Mantaining | ||
231 | parallelism is a *very* good idea here. The idea is for the | ||
232 | runtime code to blindly call these functions, not knowing/caring | ||
233 | about the underlying hardware. This stuff should contain no | ||
234 | conditionals; if more functionality is needed a different entry | ||
235 | should be established. These calls are the interface calls and | ||
236 | are the only functions that should be accessed. Anyone caught | ||
237 | making direct calls deserves what they get. | ||
238 | -------------------------------------------------------------------- */ | ||
239 | |||
240 | static inline void memwinon(struct board_info *b, unsigned int win) | ||
241 | { | ||
242 | (b->memwinon)(b, win); | ||
243 | } | ||
244 | |||
245 | static inline void memwinoff(struct board_info *b, unsigned int win) | ||
246 | { | ||
247 | (b->memwinoff)(b, win); | ||
248 | } | ||
249 | |||
250 | static inline void globalwinon(struct channel *ch) | ||
251 | { | ||
252 | (ch->board->globalwinon)(ch); | ||
253 | } | ||
254 | |||
255 | static inline void rxwinon(struct channel *ch) | ||
256 | { | ||
257 | (ch->board->rxwinon)(ch); | ||
258 | } | ||
259 | |||
260 | static inline void txwinon(struct channel *ch) | ||
261 | { | ||
262 | (ch->board->txwinon)(ch); | ||
263 | } | ||
264 | |||
265 | static inline void memoff(struct channel *ch) | ||
266 | { | ||
267 | (ch->board->memoff)(ch); | ||
268 | } | ||
269 | static inline void assertgwinon(struct channel *ch) | ||
270 | { | ||
271 | (ch->board->assertgwinon)(ch); | ||
272 | } | ||
273 | |||
274 | static inline void assertmemoff(struct channel *ch) | ||
275 | { | ||
276 | (ch->board->assertmemoff)(ch); | ||
277 | } | ||
278 | |||
279 | /* --------------------------------------------------------- | ||
280 | PCXEM windowing is the same as that used in the PCXR | ||
281 | and CX series cards. | ||
282 | ------------------------------------------------------------ */ | ||
283 | |||
284 | static inline void pcxem_memwinon(struct board_info *b, unsigned int win) | ||
285 | { | ||
286 | outb_p(FEPWIN|win, (int)b->port + 1); | ||
287 | } | ||
288 | |||
289 | static inline void pcxem_memwinoff(struct board_info *b, unsigned int win) | ||
290 | { | ||
291 | outb_p(0, (int)b->port + 1); | ||
292 | } | ||
293 | |||
294 | static inline void pcxem_globalwinon(struct channel *ch) | ||
295 | { | ||
296 | outb_p( FEPWIN, (int)ch->board->port + 1); | ||
297 | } | ||
298 | |||
299 | static inline void pcxem_rxwinon(struct channel *ch) | ||
300 | { | ||
301 | outb_p(ch->rxwin, (int)ch->board->port + 1); | ||
302 | } | ||
303 | |||
304 | static inline void pcxem_txwinon(struct channel *ch) | ||
305 | { | ||
306 | outb_p(ch->txwin, (int)ch->board->port + 1); | ||
307 | } | ||
308 | |||
309 | static inline void pcxem_memoff(struct channel *ch) | ||
310 | { | ||
311 | outb_p(0, (int)ch->board->port + 1); | ||
312 | } | ||
313 | |||
314 | /* ----------------- Begin pcxe memory window stuff ------------------ */ | ||
315 | |||
316 | static inline void pcxe_memwinon(struct board_info *b, unsigned int win) | ||
317 | { | ||
318 | outb_p(FEPWIN | win, (int)b->port + 1); | ||
319 | } | ||
320 | |||
321 | static inline void pcxe_memwinoff(struct board_info *b, unsigned int win) | ||
322 | { | ||
323 | outb_p(inb((int)b->port) & ~FEPMEM, | ||
324 | (int)b->port + 1); | ||
325 | outb_p(0, (int)b->port + 1); | ||
326 | } | ||
327 | |||
328 | static inline void pcxe_globalwinon(struct channel *ch) | ||
329 | { | ||
330 | outb_p( FEPWIN, (int)ch->board->port + 1); | ||
331 | } | ||
332 | |||
333 | static inline void pcxe_rxwinon(struct channel *ch) | ||
334 | { | ||
335 | outb_p(ch->rxwin, (int)ch->board->port + 1); | ||
336 | } | ||
337 | |||
338 | static inline void pcxe_txwinon(struct channel *ch) | ||
339 | { | ||
340 | outb_p(ch->txwin, (int)ch->board->port + 1); | ||
341 | } | ||
342 | |||
343 | static inline void pcxe_memoff(struct channel *ch) | ||
344 | { | ||
345 | outb_p(0, (int)ch->board->port); | ||
346 | outb_p(0, (int)ch->board->port + 1); | ||
347 | } | ||
348 | |||
349 | /* ------------- Begin pc64xe and pcxi memory window stuff -------------- */ | ||
350 | |||
351 | static inline void pcxi_memwinon(struct board_info *b, unsigned int win) | ||
352 | { | ||
353 | outb_p(inb((int)b->port) | FEPMEM, (int)b->port); | ||
354 | } | ||
355 | |||
356 | static inline void pcxi_memwinoff(struct board_info *b, unsigned int win) | ||
357 | { | ||
358 | outb_p(inb((int)b->port) & ~FEPMEM, (int)b->port); | ||
359 | } | ||
360 | |||
361 | static inline void pcxi_globalwinon(struct channel *ch) | ||
362 | { | ||
363 | outb_p(FEPMEM, (int)ch->board->port); | ||
364 | } | ||
365 | |||
366 | static inline void pcxi_rxwinon(struct channel *ch) | ||
367 | { | ||
368 | outb_p(FEPMEM, (int)ch->board->port); | ||
369 | } | ||
370 | |||
371 | static inline void pcxi_txwinon(struct channel *ch) | ||
372 | { | ||
373 | outb_p(FEPMEM, (int)ch->board->port); | ||
374 | } | ||
375 | |||
376 | static inline void pcxi_memoff(struct channel *ch) | ||
377 | { | ||
378 | outb_p(0, (int)ch->board->port); | ||
379 | } | ||
380 | |||
381 | static inline void pcxi_assertgwinon(struct channel *ch) | ||
382 | { | ||
383 | epcaassert(inb((int)ch->board->port) & FEPMEM, "Global memory off"); | ||
384 | } | ||
385 | |||
386 | static inline void pcxi_assertmemoff(struct channel *ch) | ||
387 | { | ||
388 | epcaassert(!(inb((int)ch->board->port) & FEPMEM), "Memory on"); | ||
389 | } | ||
390 | |||
391 | |||
392 | /* ---------------------------------------------------------------------- | ||
393 | Not all of the cards need specific memory windowing routines. Some | ||
394 | cards (Such as PCI) needs no windowing routines at all. We provide | ||
395 | these do nothing routines so that the same code base can be used. | ||
396 | The driver will ALWAYS call a windowing routine if it thinks it needs | ||
397 | to; regardless of the card. However, dependent on the card the routine | ||
398 | may or may not do anything. | ||
399 | ---------------------------------------------------------------------------*/ | ||
400 | |||
401 | static inline void dummy_memwinon(struct board_info *b, unsigned int win) | ||
402 | { | ||
403 | } | ||
404 | |||
405 | static inline void dummy_memwinoff(struct board_info *b, unsigned int win) | ||
406 | { | ||
407 | } | ||
408 | |||
409 | static inline void dummy_globalwinon(struct channel *ch) | ||
410 | { | ||
411 | } | ||
412 | |||
413 | static inline void dummy_rxwinon(struct channel *ch) | ||
414 | { | ||
415 | } | ||
416 | |||
417 | static inline void dummy_txwinon(struct channel *ch) | ||
418 | { | ||
419 | } | ||
420 | |||
421 | static inline void dummy_memoff(struct channel *ch) | ||
422 | { | ||
423 | } | ||
424 | |||
425 | static inline void dummy_assertgwinon(struct channel *ch) | ||
426 | { | ||
427 | } | ||
428 | |||
429 | static inline void dummy_assertmemoff(struct channel *ch) | ||
430 | { | ||
431 | } | ||
432 | |||
433 | /* ----------------- Begin verifyChannel function ----------------------- */ | ||
434 | static inline struct channel *verifyChannel(register struct tty_struct *tty) | ||
435 | { /* Begin verifyChannel */ | ||
436 | |||
437 | /* -------------------------------------------------------------------- | ||
438 | This routine basically provides a sanity check. It insures that | ||
439 | the channel returned is within the proper range of addresses as | ||
440 | well as properly initialized. If some bogus info gets passed in | ||
441 | through tty->driver_data this should catch it. | ||
442 | --------------------------------------------------------------------- */ | ||
443 | |||
444 | if (tty) | ||
445 | { /* Begin if tty */ | ||
446 | |||
447 | register struct channel *ch = (struct channel *)tty->driver_data; | ||
448 | |||
449 | if ((ch >= &digi_channels[0]) && (ch < &digi_channels[nbdevs])) | ||
450 | { | ||
451 | if (ch->magic == EPCA_MAGIC) | ||
452 | return ch; | ||
453 | } | ||
454 | |||
455 | } /* End if tty */ | ||
456 | |||
457 | /* Else return a NULL for invalid */ | ||
458 | return NULL; | ||
459 | |||
460 | } /* End verifyChannel */ | ||
461 | |||
462 | /* ------------------ Begin pc_sched_event ------------------------- */ | ||
463 | |||
464 | static inline void pc_sched_event(struct channel *ch, int event) | ||
465 | { /* Begin pc_sched_event */ | ||
466 | |||
467 | |||
468 | /* ---------------------------------------------------------------------- | ||
469 | We call this to schedule interrupt processing on some event. The | ||
470 | kernel sees our request and calls the related routine in OUR driver. | ||
471 | -------------------------------------------------------------------------*/ | ||
472 | |||
473 | ch->event |= 1 << event; | ||
474 | schedule_work(&ch->tqueue); | ||
475 | |||
476 | |||
477 | } /* End pc_sched_event */ | ||
478 | |||
479 | /* ------------------ Begin epca_error ------------------------- */ | ||
480 | |||
481 | static void epca_error(int line, char *msg) | ||
482 | { /* Begin epca_error */ | ||
483 | |||
484 | printk(KERN_ERR "epca_error (Digi): line = %d %s\n",line,msg); | ||
485 | return; | ||
486 | |||
487 | } /* End epca_error */ | ||
488 | |||
489 | /* ------------------ Begin pc_close ------------------------- */ | ||
490 | static void pc_close(struct tty_struct * tty, struct file * filp) | ||
491 | { /* Begin pc_close */ | ||
492 | |||
493 | struct channel *ch; | ||
494 | unsigned long flags; | ||
495 | |||
496 | /* --------------------------------------------------------- | ||
497 | verifyChannel returns the channel from the tty struct | ||
498 | if it is valid. This serves as a sanity check. | ||
499 | ------------------------------------------------------------- */ | ||
500 | |||
501 | if ((ch = verifyChannel(tty)) != NULL) | ||
502 | { /* Begin if ch != NULL */ | ||
503 | |||
504 | save_flags(flags); | ||
505 | cli(); | ||
506 | |||
507 | if (tty_hung_up_p(filp)) | ||
508 | { | ||
509 | restore_flags(flags); | ||
510 | return; | ||
511 | } | ||
512 | |||
513 | /* Check to see if the channel is open more than once */ | ||
514 | if (ch->count-- > 1) | ||
515 | { /* Begin channel is open more than once */ | ||
516 | |||
517 | /* ------------------------------------------------------------- | ||
518 | Return without doing anything. Someone might still be using | ||
519 | the channel. | ||
520 | ---------------------------------------------------------------- */ | ||
521 | |||
522 | restore_flags(flags); | ||
523 | return; | ||
524 | } /* End channel is open more than once */ | ||
525 | |||
526 | /* Port open only once go ahead with shutdown & reset */ | ||
527 | |||
528 | if (ch->count < 0) | ||
529 | { | ||
530 | ch->count = 0; | ||
531 | } | ||
532 | |||
533 | /* --------------------------------------------------------------- | ||
534 | Let the rest of the driver know the channel is being closed. | ||
535 | This becomes important if an open is attempted before close | ||
536 | is finished. | ||
537 | ------------------------------------------------------------------ */ | ||
538 | |||
539 | ch->asyncflags |= ASYNC_CLOSING; | ||
540 | |||
541 | tty->closing = 1; | ||
542 | |||
543 | if (ch->asyncflags & ASYNC_INITIALIZED) | ||
544 | { | ||
545 | /* Setup an event to indicate when the transmit buffer empties */ | ||
546 | setup_empty_event(tty, ch); | ||
547 | tty_wait_until_sent(tty, 3000); /* 30 seconds timeout */ | ||
548 | } | ||
549 | |||
550 | if (tty->driver->flush_buffer) | ||
551 | tty->driver->flush_buffer(tty); | ||
552 | |||
553 | tty_ldisc_flush(tty); | ||
554 | shutdown(ch); | ||
555 | tty->closing = 0; | ||
556 | ch->event = 0; | ||
557 | ch->tty = NULL; | ||
558 | |||
559 | if (ch->blocked_open) | ||
560 | { /* Begin if blocked_open */ | ||
561 | |||
562 | if (ch->close_delay) | ||
563 | { | ||
564 | msleep_interruptible(jiffies_to_msecs(ch->close_delay)); | ||
565 | } | ||
566 | |||
567 | wake_up_interruptible(&ch->open_wait); | ||
568 | |||
569 | } /* End if blocked_open */ | ||
570 | |||
571 | ch->asyncflags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_INITIALIZED | | ||
572 | ASYNC_CLOSING); | ||
573 | wake_up_interruptible(&ch->close_wait); | ||
574 | |||
575 | |||
576 | restore_flags(flags); | ||
577 | |||
578 | } /* End if ch != NULL */ | ||
579 | |||
580 | } /* End pc_close */ | ||
581 | |||
582 | /* ------------------ Begin shutdown ------------------------- */ | ||
583 | |||
584 | static void shutdown(struct channel *ch) | ||
585 | { /* Begin shutdown */ | ||
586 | |||
587 | unsigned long flags; | ||
588 | struct tty_struct *tty; | ||
589 | volatile struct board_chan *bc; | ||
590 | |||
591 | if (!(ch->asyncflags & ASYNC_INITIALIZED)) | ||
592 | return; | ||
593 | |||
594 | save_flags(flags); | ||
595 | cli(); | ||
596 | globalwinon(ch); | ||
597 | |||
598 | bc = ch->brdchan; | ||
599 | |||
600 | /* ------------------------------------------------------------------ | ||
601 | In order for an event to be generated on the receipt of data the | ||
602 | idata flag must be set. Since we are shutting down, this is not | ||
603 | necessary clear this flag. | ||
604 | --------------------------------------------------------------------- */ | ||
605 | |||
606 | if (bc) | ||
607 | bc->idata = 0; | ||
608 | |||
609 | tty = ch->tty; | ||
610 | |||
611 | /* ---------------------------------------------------------------- | ||
612 | If we're a modem control device and HUPCL is on, drop RTS & DTR. | ||
613 | ------------------------------------------------------------------ */ | ||
614 | |||
615 | if (tty->termios->c_cflag & HUPCL) | ||
616 | { | ||
617 | ch->omodem &= ~(ch->m_rts | ch->m_dtr); | ||
618 | fepcmd(ch, SETMODEM, 0, ch->m_dtr | ch->m_rts, 10, 1); | ||
619 | } | ||
620 | |||
621 | memoff(ch); | ||
622 | |||
623 | /* ------------------------------------------------------------------ | ||
624 | The channel has officialy been closed. The next time it is opened | ||
625 | it will have to reinitialized. Set a flag to indicate this. | ||
626 | ---------------------------------------------------------------------- */ | ||
627 | |||
628 | /* Prevent future Digi programmed interrupts from coming active */ | ||
629 | |||
630 | ch->asyncflags &= ~ASYNC_INITIALIZED; | ||
631 | restore_flags(flags); | ||
632 | |||
633 | } /* End shutdown */ | ||
634 | |||
635 | /* ------------------ Begin pc_hangup ------------------------- */ | ||
636 | |||
637 | static void pc_hangup(struct tty_struct *tty) | ||
638 | { /* Begin pc_hangup */ | ||
639 | |||
640 | struct channel *ch; | ||
641 | |||
642 | /* --------------------------------------------------------- | ||
643 | verifyChannel returns the channel from the tty struct | ||
644 | if it is valid. This serves as a sanity check. | ||
645 | ------------------------------------------------------------- */ | ||
646 | |||
647 | if ((ch = verifyChannel(tty)) != NULL) | ||
648 | { /* Begin if ch != NULL */ | ||
649 | |||
650 | unsigned long flags; | ||
651 | |||
652 | save_flags(flags); | ||
653 | cli(); | ||
654 | if (tty->driver->flush_buffer) | ||
655 | tty->driver->flush_buffer(tty); | ||
656 | tty_ldisc_flush(tty); | ||
657 | shutdown(ch); | ||
658 | |||
659 | ch->tty = NULL; | ||
660 | ch->event = 0; | ||
661 | ch->count = 0; | ||
662 | restore_flags(flags); | ||
663 | ch->asyncflags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_INITIALIZED); | ||
664 | wake_up_interruptible(&ch->open_wait); | ||
665 | |||
666 | } /* End if ch != NULL */ | ||
667 | |||
668 | } /* End pc_hangup */ | ||
669 | |||
670 | /* ------------------ Begin pc_write ------------------------- */ | ||
671 | |||
672 | static int pc_write(struct tty_struct * tty, | ||
673 | const unsigned char *buf, int bytesAvailable) | ||
674 | { /* Begin pc_write */ | ||
675 | |||
676 | register unsigned int head, tail; | ||
677 | register int dataLen; | ||
678 | register int size; | ||
679 | register int amountCopied; | ||
680 | |||
681 | |||
682 | struct channel *ch; | ||
683 | unsigned long flags; | ||
684 | int remain; | ||
685 | volatile struct board_chan *bc; | ||
686 | |||
687 | |||
688 | /* ---------------------------------------------------------------- | ||
689 | pc_write is primarily called directly by the kernel routine | ||
690 | tty_write (Though it can also be called by put_char) found in | ||
691 | tty_io.c. pc_write is passed a line discipline buffer where | ||
692 | the data to be written out is stored. The line discipline | ||
693 | implementation itself is done at the kernel level and is not | ||
694 | brought into the driver. | ||
695 | ------------------------------------------------------------------- */ | ||
696 | |||
697 | /* --------------------------------------------------------- | ||
698 | verifyChannel returns the channel from the tty struct | ||
699 | if it is valid. This serves as a sanity check. | ||
700 | ------------------------------------------------------------- */ | ||
701 | |||
702 | if ((ch = verifyChannel(tty)) == NULL) | ||
703 | return 0; | ||
704 | |||
705 | /* Make a pointer to the channel data structure found on the board. */ | ||
706 | |||
707 | bc = ch->brdchan; | ||
708 | size = ch->txbufsize; | ||
709 | |||
710 | amountCopied = 0; | ||
711 | save_flags(flags); | ||
712 | cli(); | ||
713 | |||
714 | globalwinon(ch); | ||
715 | |||
716 | head = bc->tin & (size - 1); | ||
717 | tail = bc->tout; | ||
718 | |||
719 | if (tail != bc->tout) | ||
720 | tail = bc->tout; | ||
721 | tail &= (size - 1); | ||
722 | |||
723 | /* If head >= tail, head has not wrapped around. */ | ||
724 | if (head >= tail) | ||
725 | { /* Begin head has not wrapped */ | ||
726 | |||
727 | /* --------------------------------------------------------------- | ||
728 | remain (much like dataLen above) represents the total amount of | ||
729 | space available on the card for data. Here dataLen represents | ||
730 | the space existing between the head pointer and the end of | ||
731 | buffer. This is important because a memcpy cannot be told to | ||
732 | automatically wrap around when it hits the buffer end. | ||
733 | ------------------------------------------------------------------ */ | ||
734 | |||
735 | dataLen = size - head; | ||
736 | remain = size - (head - tail) - 1; | ||
737 | |||
738 | } /* End head has not wrapped */ | ||
739 | else | ||
740 | { /* Begin head has wrapped around */ | ||
741 | |||
742 | remain = tail - head - 1; | ||
743 | dataLen = remain; | ||
744 | |||
745 | } /* End head has wrapped around */ | ||
746 | |||
747 | /* ------------------------------------------------------------------- | ||
748 | Check the space on the card. If we have more data than | ||
749 | space; reduce the amount of data to fit the space. | ||
750 | ---------------------------------------------------------------------- */ | ||
751 | |||
752 | bytesAvailable = min(remain, bytesAvailable); | ||
753 | |||
754 | txwinon(ch); | ||
755 | while (bytesAvailable > 0) | ||
756 | { /* Begin while there is data to copy onto card */ | ||
757 | |||
758 | /* ----------------------------------------------------------------- | ||
759 | If head is not wrapped, the below will make sure the first | ||
760 | data copy fills to the end of card buffer. | ||
761 | ------------------------------------------------------------------- */ | ||
762 | |||
763 | dataLen = min(bytesAvailable, dataLen); | ||
764 | memcpy(ch->txptr + head, buf, dataLen); | ||
765 | buf += dataLen; | ||
766 | head += dataLen; | ||
767 | amountCopied += dataLen; | ||
768 | bytesAvailable -= dataLen; | ||
769 | |||
770 | if (head >= size) | ||
771 | { | ||
772 | head = 0; | ||
773 | dataLen = tail; | ||
774 | } | ||
775 | |||
776 | } /* End while there is data to copy onto card */ | ||
777 | |||
778 | ch->statusflags |= TXBUSY; | ||
779 | globalwinon(ch); | ||
780 | bc->tin = head; | ||
781 | |||
782 | if ((ch->statusflags & LOWWAIT) == 0) | ||
783 | { | ||
784 | ch->statusflags |= LOWWAIT; | ||
785 | bc->ilow = 1; | ||
786 | } | ||
787 | memoff(ch); | ||
788 | restore_flags(flags); | ||
789 | |||
790 | return(amountCopied); | ||
791 | |||
792 | } /* End pc_write */ | ||
793 | |||
794 | /* ------------------ Begin pc_put_char ------------------------- */ | ||
795 | |||
796 | static void pc_put_char(struct tty_struct *tty, unsigned char c) | ||
797 | { /* Begin pc_put_char */ | ||
798 | |||
799 | |||
800 | pc_write(tty, &c, 1); | ||
801 | return; | ||
802 | |||
803 | } /* End pc_put_char */ | ||
804 | |||
805 | /* ------------------ Begin pc_write_room ------------------------- */ | ||
806 | |||
807 | static int pc_write_room(struct tty_struct *tty) | ||
808 | { /* Begin pc_write_room */ | ||
809 | |||
810 | int remain; | ||
811 | struct channel *ch; | ||
812 | unsigned long flags; | ||
813 | unsigned int head, tail; | ||
814 | volatile struct board_chan *bc; | ||
815 | |||
816 | remain = 0; | ||
817 | |||
818 | /* --------------------------------------------------------- | ||
819 | verifyChannel returns the channel from the tty struct | ||
820 | if it is valid. This serves as a sanity check. | ||
821 | ------------------------------------------------------------- */ | ||
822 | |||
823 | if ((ch = verifyChannel(tty)) != NULL) | ||
824 | { | ||
825 | save_flags(flags); | ||
826 | cli(); | ||
827 | globalwinon(ch); | ||
828 | |||
829 | bc = ch->brdchan; | ||
830 | head = bc->tin & (ch->txbufsize - 1); | ||
831 | tail = bc->tout; | ||
832 | |||
833 | if (tail != bc->tout) | ||
834 | tail = bc->tout; | ||
835 | /* Wrap tail if necessary */ | ||
836 | tail &= (ch->txbufsize - 1); | ||
837 | |||
838 | if ((remain = tail - head - 1) < 0 ) | ||
839 | remain += ch->txbufsize; | ||
840 | |||
841 | if (remain && (ch->statusflags & LOWWAIT) == 0) | ||
842 | { | ||
843 | ch->statusflags |= LOWWAIT; | ||
844 | bc->ilow = 1; | ||
845 | } | ||
846 | memoff(ch); | ||
847 | restore_flags(flags); | ||
848 | } | ||
849 | |||
850 | /* Return how much room is left on card */ | ||
851 | return remain; | ||
852 | |||
853 | } /* End pc_write_room */ | ||
854 | |||
855 | /* ------------------ Begin pc_chars_in_buffer ---------------------- */ | ||
856 | |||
857 | static int pc_chars_in_buffer(struct tty_struct *tty) | ||
858 | { /* Begin pc_chars_in_buffer */ | ||
859 | |||
860 | int chars; | ||
861 | unsigned int ctail, head, tail; | ||
862 | int remain; | ||
863 | unsigned long flags; | ||
864 | struct channel *ch; | ||
865 | volatile struct board_chan *bc; | ||
866 | |||
867 | |||
868 | /* --------------------------------------------------------- | ||
869 | verifyChannel returns the channel from the tty struct | ||
870 | if it is valid. This serves as a sanity check. | ||
871 | ------------------------------------------------------------- */ | ||
872 | |||
873 | if ((ch = verifyChannel(tty)) == NULL) | ||
874 | return(0); | ||
875 | |||
876 | save_flags(flags); | ||
877 | cli(); | ||
878 | globalwinon(ch); | ||
879 | |||
880 | bc = ch->brdchan; | ||
881 | tail = bc->tout; | ||
882 | head = bc->tin; | ||
883 | ctail = ch->mailbox->cout; | ||
884 | |||
885 | if (tail == head && ch->mailbox->cin == ctail && bc->tbusy == 0) | ||
886 | chars = 0; | ||
887 | else | ||
888 | { /* Begin if some space on the card has been used */ | ||
889 | |||
890 | head = bc->tin & (ch->txbufsize - 1); | ||
891 | tail &= (ch->txbufsize - 1); | ||
892 | |||
893 | /* -------------------------------------------------------------- | ||
894 | The logic here is basically opposite of the above pc_write_room | ||
895 | here we are finding the amount of bytes in the buffer filled. | ||
896 | Not the amount of bytes empty. | ||
897 | ------------------------------------------------------------------- */ | ||
898 | |||
899 | if ((remain = tail - head - 1) < 0 ) | ||
900 | remain += ch->txbufsize; | ||
901 | |||
902 | chars = (int)(ch->txbufsize - remain); | ||
903 | |||
904 | /* ------------------------------------------------------------- | ||
905 | Make it possible to wakeup anything waiting for output | ||
906 | in tty_ioctl.c, etc. | ||
907 | |||
908 | If not already set. Setup an event to indicate when the | ||
909 | transmit buffer empties | ||
910 | ----------------------------------------------------------------- */ | ||
911 | |||
912 | if (!(ch->statusflags & EMPTYWAIT)) | ||
913 | setup_empty_event(tty,ch); | ||
914 | |||
915 | } /* End if some space on the card has been used */ | ||
916 | |||
917 | memoff(ch); | ||
918 | restore_flags(flags); | ||
919 | |||
920 | /* Return number of characters residing on card. */ | ||
921 | return(chars); | ||
922 | |||
923 | } /* End pc_chars_in_buffer */ | ||
924 | |||
925 | /* ------------------ Begin pc_flush_buffer ---------------------- */ | ||
926 | |||
927 | static void pc_flush_buffer(struct tty_struct *tty) | ||
928 | { /* Begin pc_flush_buffer */ | ||
929 | |||
930 | unsigned int tail; | ||
931 | unsigned long flags; | ||
932 | struct channel *ch; | ||
933 | volatile struct board_chan *bc; | ||
934 | |||
935 | |||
936 | /* --------------------------------------------------------- | ||
937 | verifyChannel returns the channel from the tty struct | ||
938 | if it is valid. This serves as a sanity check. | ||
939 | ------------------------------------------------------------- */ | ||
940 | |||
941 | if ((ch = verifyChannel(tty)) == NULL) | ||
942 | return; | ||
943 | |||
944 | save_flags(flags); | ||
945 | cli(); | ||
946 | |||
947 | globalwinon(ch); | ||
948 | |||
949 | bc = ch->brdchan; | ||
950 | tail = bc->tout; | ||
951 | |||
952 | /* Have FEP move tout pointer; effectively flushing transmit buffer */ | ||
953 | |||
954 | fepcmd(ch, STOUT, (unsigned) tail, 0, 0, 0); | ||
955 | |||
956 | memoff(ch); | ||
957 | restore_flags(flags); | ||
958 | |||
959 | wake_up_interruptible(&tty->write_wait); | ||
960 | tty_wakeup(tty); | ||
961 | |||
962 | } /* End pc_flush_buffer */ | ||
963 | |||
964 | /* ------------------ Begin pc_flush_chars ---------------------- */ | ||
965 | |||
966 | static void pc_flush_chars(struct tty_struct *tty) | ||
967 | { /* Begin pc_flush_chars */ | ||
968 | |||
969 | struct channel * ch; | ||
970 | |||
971 | /* --------------------------------------------------------- | ||
972 | verifyChannel returns the channel from the tty struct | ||
973 | if it is valid. This serves as a sanity check. | ||
974 | ------------------------------------------------------------- */ | ||
975 | |||
976 | if ((ch = verifyChannel(tty)) != NULL) | ||
977 | { | ||
978 | unsigned long flags; | ||
979 | |||
980 | save_flags(flags); | ||
981 | cli(); | ||
982 | |||
983 | /* ---------------------------------------------------------------- | ||
984 | If not already set and the transmitter is busy setup an event | ||
985 | to indicate when the transmit empties. | ||
986 | ------------------------------------------------------------------- */ | ||
987 | |||
988 | if ((ch->statusflags & TXBUSY) && !(ch->statusflags & EMPTYWAIT)) | ||
989 | setup_empty_event(tty,ch); | ||
990 | |||
991 | restore_flags(flags); | ||
992 | } | ||
993 | |||
994 | } /* End pc_flush_chars */ | ||
995 | |||
996 | /* ------------------ Begin block_til_ready ---------------------- */ | ||
997 | |||
998 | static int block_til_ready(struct tty_struct *tty, | ||
999 | struct file *filp, struct channel *ch) | ||
1000 | { /* Begin block_til_ready */ | ||
1001 | |||
1002 | DECLARE_WAITQUEUE(wait,current); | ||
1003 | int retval, do_clocal = 0; | ||
1004 | unsigned long flags; | ||
1005 | |||
1006 | |||
1007 | if (tty_hung_up_p(filp)) | ||
1008 | { | ||
1009 | if (ch->asyncflags & ASYNC_HUP_NOTIFY) | ||
1010 | retval = -EAGAIN; | ||
1011 | else | ||
1012 | retval = -ERESTARTSYS; | ||
1013 | return(retval); | ||
1014 | } | ||
1015 | |||
1016 | /* ----------------------------------------------------------------- | ||
1017 | If the device is in the middle of being closed, then block | ||
1018 | until it's done, and then try again. | ||
1019 | -------------------------------------------------------------------- */ | ||
1020 | if (ch->asyncflags & ASYNC_CLOSING) | ||
1021 | { | ||
1022 | interruptible_sleep_on(&ch->close_wait); | ||
1023 | |||
1024 | if (ch->asyncflags & ASYNC_HUP_NOTIFY) | ||
1025 | return -EAGAIN; | ||
1026 | else | ||
1027 | return -ERESTARTSYS; | ||
1028 | } | ||
1029 | |||
1030 | if (filp->f_flags & O_NONBLOCK) | ||
1031 | { | ||
1032 | /* ----------------------------------------------------------------- | ||
1033 | If non-blocking mode is set, then make the check up front | ||
1034 | and then exit. | ||
1035 | -------------------------------------------------------------------- */ | ||
1036 | |||
1037 | ch->asyncflags |= ASYNC_NORMAL_ACTIVE; | ||
1038 | |||
1039 | return 0; | ||
1040 | } | ||
1041 | |||
1042 | |||
1043 | if (tty->termios->c_cflag & CLOCAL) | ||
1044 | do_clocal = 1; | ||
1045 | |||
1046 | /* Block waiting for the carrier detect and the line to become free */ | ||
1047 | |||
1048 | retval = 0; | ||
1049 | add_wait_queue(&ch->open_wait, &wait); | ||
1050 | save_flags(flags); | ||
1051 | cli(); | ||
1052 | |||
1053 | |||
1054 | /* We dec count so that pc_close will know when to free things */ | ||
1055 | if (!tty_hung_up_p(filp)) | ||
1056 | ch->count--; | ||
1057 | |||
1058 | restore_flags(flags); | ||
1059 | |||
1060 | ch->blocked_open++; | ||
1061 | |||
1062 | while(1) | ||
1063 | { /* Begin forever while */ | ||
1064 | |||
1065 | set_current_state(TASK_INTERRUPTIBLE); | ||
1066 | |||
1067 | if (tty_hung_up_p(filp) || | ||
1068 | !(ch->asyncflags & ASYNC_INITIALIZED)) | ||
1069 | { | ||
1070 | if (ch->asyncflags & ASYNC_HUP_NOTIFY) | ||
1071 | retval = -EAGAIN; | ||
1072 | else | ||
1073 | retval = -ERESTARTSYS; | ||
1074 | break; | ||
1075 | } | ||
1076 | |||
1077 | if (!(ch->asyncflags & ASYNC_CLOSING) && | ||
1078 | (do_clocal || (ch->imodem & ch->dcd))) | ||
1079 | break; | ||
1080 | |||
1081 | if (signal_pending(current)) | ||
1082 | { | ||
1083 | retval = -ERESTARTSYS; | ||
1084 | break; | ||
1085 | } | ||
1086 | |||
1087 | /* --------------------------------------------------------------- | ||
1088 | Allow someone else to be scheduled. We will occasionally go | ||
1089 | through this loop until one of the above conditions change. | ||
1090 | The below schedule call will allow other processes to enter and | ||
1091 | prevent this loop from hogging the cpu. | ||
1092 | ------------------------------------------------------------------ */ | ||
1093 | schedule(); | ||
1094 | |||
1095 | } /* End forever while */ | ||
1096 | |||
1097 | current->state = TASK_RUNNING; | ||
1098 | remove_wait_queue(&ch->open_wait, &wait); | ||
1099 | cli(); | ||
1100 | if (!tty_hung_up_p(filp)) | ||
1101 | ch->count++; | ||
1102 | restore_flags(flags); | ||
1103 | |||
1104 | ch->blocked_open--; | ||
1105 | |||
1106 | if (retval) | ||
1107 | return retval; | ||
1108 | |||
1109 | ch->asyncflags |= ASYNC_NORMAL_ACTIVE; | ||
1110 | |||
1111 | return 0; | ||
1112 | |||
1113 | } /* End block_til_ready */ | ||
1114 | |||
1115 | /* ------------------ Begin pc_open ---------------------- */ | ||
1116 | |||
1117 | static int pc_open(struct tty_struct *tty, struct file * filp) | ||
1118 | { /* Begin pc_open */ | ||
1119 | |||
1120 | struct channel *ch; | ||
1121 | unsigned long flags; | ||
1122 | int line, retval, boardnum; | ||
1123 | volatile struct board_chan *bc; | ||
1124 | volatile unsigned int head; | ||
1125 | |||
1126 | line = tty->index; | ||
1127 | if (line < 0 || line >= nbdevs) | ||
1128 | { | ||
1129 | printk(KERN_ERR "<Error> - pc_open : line out of range in pc_open\n"); | ||
1130 | tty->driver_data = NULL; | ||
1131 | return(-ENODEV); | ||
1132 | } | ||
1133 | |||
1134 | |||
1135 | ch = &digi_channels[line]; | ||
1136 | boardnum = ch->boardnum; | ||
1137 | |||
1138 | /* Check status of board configured in system. */ | ||
1139 | |||
1140 | /* ----------------------------------------------------------------- | ||
1141 | I check to see if the epca_setup routine detected an user error. | ||
1142 | It might be better to put this in pc_init, but for the moment it | ||
1143 | goes here. | ||
1144 | ---------------------------------------------------------------------- */ | ||
1145 | |||
1146 | if (invalid_lilo_config) | ||
1147 | { | ||
1148 | if (setup_error_code & INVALID_BOARD_TYPE) | ||
1149 | printk(KERN_ERR "<Error> - pc_open: Invalid board type specified in LILO command\n"); | ||
1150 | |||
1151 | if (setup_error_code & INVALID_NUM_PORTS) | ||
1152 | printk(KERN_ERR "<Error> - pc_open: Invalid number of ports specified in LILO command\n"); | ||
1153 | |||
1154 | if (setup_error_code & INVALID_MEM_BASE) | ||
1155 | printk(KERN_ERR "<Error> - pc_open: Invalid board memory address specified in LILO command\n"); | ||
1156 | |||
1157 | if (setup_error_code & INVALID_PORT_BASE) | ||
1158 | printk(KERN_ERR "<Error> - pc_open: Invalid board port address specified in LILO command\n"); | ||
1159 | |||
1160 | if (setup_error_code & INVALID_BOARD_STATUS) | ||
1161 | printk(KERN_ERR "<Error> - pc_open: Invalid board status specified in LILO command\n"); | ||
1162 | |||
1163 | if (setup_error_code & INVALID_ALTPIN) | ||
1164 | printk(KERN_ERR "<Error> - pc_open: Invalid board altpin specified in LILO command\n"); | ||
1165 | |||
1166 | tty->driver_data = NULL; /* Mark this device as 'down' */ | ||
1167 | return(-ENODEV); | ||
1168 | } | ||
1169 | |||
1170 | if ((boardnum >= num_cards) || (boards[boardnum].status == DISABLED)) | ||
1171 | { | ||
1172 | tty->driver_data = NULL; /* Mark this device as 'down' */ | ||
1173 | return(-ENODEV); | ||
1174 | } | ||
1175 | |||
1176 | if (( bc = ch->brdchan) == 0) | ||
1177 | { | ||
1178 | tty->driver_data = NULL; | ||
1179 | return(-ENODEV); | ||
1180 | } | ||
1181 | |||
1182 | /* ------------------------------------------------------------------ | ||
1183 | Every time a channel is opened, increment a counter. This is | ||
1184 | necessary because we do not wish to flush and shutdown the channel | ||
1185 | until the last app holding the channel open, closes it. | ||
1186 | --------------------------------------------------------------------- */ | ||
1187 | |||
1188 | ch->count++; | ||
1189 | |||
1190 | /* ---------------------------------------------------------------- | ||
1191 | Set a kernel structures pointer to our local channel | ||
1192 | structure. This way we can get to it when passed only | ||
1193 | a tty struct. | ||
1194 | ------------------------------------------------------------------ */ | ||
1195 | |||
1196 | tty->driver_data = ch; | ||
1197 | |||
1198 | /* ---------------------------------------------------------------- | ||
1199 | If this is the first time the channel has been opened, initialize | ||
1200 | the tty->termios struct otherwise let pc_close handle it. | ||
1201 | -------------------------------------------------------------------- */ | ||
1202 | |||
1203 | save_flags(flags); | ||
1204 | cli(); | ||
1205 | |||
1206 | globalwinon(ch); | ||
1207 | ch->statusflags = 0; | ||
1208 | |||
1209 | /* Save boards current modem status */ | ||
1210 | ch->imodem = bc->mstat; | ||
1211 | |||
1212 | /* ---------------------------------------------------------------- | ||
1213 | Set receive head and tail ptrs to each other. This indicates | ||
1214 | no data available to read. | ||
1215 | ----------------------------------------------------------------- */ | ||
1216 | head = bc->rin; | ||
1217 | bc->rout = head; | ||
1218 | |||
1219 | /* Set the channels associated tty structure */ | ||
1220 | ch->tty = tty; | ||
1221 | |||
1222 | /* ----------------------------------------------------------------- | ||
1223 | The below routine generally sets up parity, baud, flow control | ||
1224 | issues, etc.... It effect both control flags and input flags. | ||
1225 | -------------------------------------------------------------------- */ | ||
1226 | epcaparam(tty,ch); | ||
1227 | |||
1228 | ch->asyncflags |= ASYNC_INITIALIZED; | ||
1229 | memoff(ch); | ||
1230 | |||
1231 | restore_flags(flags); | ||
1232 | |||
1233 | retval = block_til_ready(tty, filp, ch); | ||
1234 | if (retval) | ||
1235 | { | ||
1236 | return retval; | ||
1237 | } | ||
1238 | |||
1239 | /* ------------------------------------------------------------- | ||
1240 | Set this again in case a hangup set it to zero while this | ||
1241 | open() was waiting for the line... | ||
1242 | --------------------------------------------------------------- */ | ||
1243 | ch->tty = tty; | ||
1244 | |||
1245 | save_flags(flags); | ||
1246 | cli(); | ||
1247 | globalwinon(ch); | ||
1248 | |||
1249 | /* Enable Digi Data events */ | ||
1250 | bc->idata = 1; | ||
1251 | |||
1252 | memoff(ch); | ||
1253 | restore_flags(flags); | ||
1254 | |||
1255 | return 0; | ||
1256 | |||
1257 | } /* End pc_open */ | ||
1258 | |||
1259 | #ifdef MODULE | ||
1260 | static int __init epca_module_init(void) | ||
1261 | { /* Begin init_module */ | ||
1262 | |||
1263 | unsigned long flags; | ||
1264 | |||
1265 | save_flags(flags); | ||
1266 | cli(); | ||
1267 | |||
1268 | pc_init(); | ||
1269 | |||
1270 | restore_flags(flags); | ||
1271 | |||
1272 | return(0); | ||
1273 | } | ||
1274 | |||
1275 | module_init(epca_module_init); | ||
1276 | #endif | ||
1277 | |||
1278 | #ifdef ENABLE_PCI | ||
1279 | static struct pci_driver epca_driver; | ||
1280 | #endif | ||
1281 | |||
1282 | #ifdef MODULE | ||
1283 | /* -------------------- Begin cleanup_module ---------------------- */ | ||
1284 | |||
1285 | static void __exit epca_module_exit(void) | ||
1286 | { | ||
1287 | |||
1288 | int count, crd; | ||
1289 | struct board_info *bd; | ||
1290 | struct channel *ch; | ||
1291 | unsigned long flags; | ||
1292 | |||
1293 | del_timer_sync(&epca_timer); | ||
1294 | |||
1295 | save_flags(flags); | ||
1296 | cli(); | ||
1297 | |||
1298 | if ((tty_unregister_driver(pc_driver)) || | ||
1299 | (tty_unregister_driver(pc_info))) | ||
1300 | { | ||
1301 | printk(KERN_WARNING "<Error> - DIGI : cleanup_module failed to un-register tty driver\n"); | ||
1302 | restore_flags(flags); | ||
1303 | return; | ||
1304 | } | ||
1305 | put_tty_driver(pc_driver); | ||
1306 | put_tty_driver(pc_info); | ||
1307 | |||
1308 | for (crd = 0; crd < num_cards; crd++) | ||
1309 | { /* Begin for each card */ | ||
1310 | |||
1311 | bd = &boards[crd]; | ||
1312 | |||
1313 | if (!bd) | ||
1314 | { /* Begin sanity check */ | ||
1315 | printk(KERN_ERR "<Error> - Digi : cleanup_module failed\n"); | ||
1316 | return; | ||
1317 | } /* End sanity check */ | ||
1318 | |||
1319 | ch = card_ptr[crd]; | ||
1320 | |||
1321 | for (count = 0; count < bd->numports; count++, ch++) | ||
1322 | { /* Begin for each port */ | ||
1323 | |||
1324 | if (ch) | ||
1325 | { | ||
1326 | if (ch->tty) | ||
1327 | tty_hangup(ch->tty); | ||
1328 | kfree(ch->tmp_buf); | ||
1329 | } | ||
1330 | |||
1331 | } /* End for each port */ | ||
1332 | } /* End for each card */ | ||
1333 | |||
1334 | #ifdef ENABLE_PCI | ||
1335 | pci_unregister_driver (&epca_driver); | ||
1336 | #endif | ||
1337 | |||
1338 | restore_flags(flags); | ||
1339 | |||
1340 | } | ||
1341 | module_exit(epca_module_exit); | ||
1342 | #endif /* MODULE */ | ||
1343 | |||
1344 | static struct tty_operations pc_ops = { | ||
1345 | .open = pc_open, | ||
1346 | .close = pc_close, | ||
1347 | .write = pc_write, | ||
1348 | .write_room = pc_write_room, | ||
1349 | .flush_buffer = pc_flush_buffer, | ||
1350 | .chars_in_buffer = pc_chars_in_buffer, | ||
1351 | .flush_chars = pc_flush_chars, | ||
1352 | .put_char = pc_put_char, | ||
1353 | .ioctl = pc_ioctl, | ||
1354 | .set_termios = pc_set_termios, | ||
1355 | .stop = pc_stop, | ||
1356 | .start = pc_start, | ||
1357 | .throttle = pc_throttle, | ||
1358 | .unthrottle = pc_unthrottle, | ||
1359 | .hangup = pc_hangup, | ||
1360 | }; | ||
1361 | |||
1362 | static int info_open(struct tty_struct *tty, struct file * filp) | ||
1363 | { | ||
1364 | return 0; | ||
1365 | } | ||
1366 | |||
1367 | static struct tty_operations info_ops = { | ||
1368 | .open = info_open, | ||
1369 | .ioctl = info_ioctl, | ||
1370 | }; | ||
1371 | |||
1372 | /* ------------------ Begin pc_init ---------------------- */ | ||
1373 | |||
1374 | int __init pc_init(void) | ||
1375 | { /* Begin pc_init */ | ||
1376 | |||
1377 | /* ---------------------------------------------------------------- | ||
1378 | pc_init is called by the operating system during boot up prior to | ||
1379 | any open calls being made. In the older versions of Linux (Prior | ||
1380 | to 2.0.0) an entry is made into tty_io.c. A pointer to the last | ||
1381 | memory location (from kernel space) used (kmem_start) is passed | ||
1382 | to pc_init. It is pc_inits responsibility to modify this value | ||
1383 | for any memory that the Digi driver might need and then return | ||
1384 | this value to the operating system. For example if the driver | ||
1385 | wishes to allocate 1K of kernel memory, pc_init would return | ||
1386 | (kmem_start + 1024). This memory (Between kmem_start and kmem_start | ||
1387 | + 1024) would then be available for use exclusively by the driver. | ||
1388 | In this case our driver does not allocate any of this kernel | ||
1389 | memory. | ||
1390 | ------------------------------------------------------------------*/ | ||
1391 | |||
1392 | ulong flags; | ||
1393 | int crd; | ||
1394 | struct board_info *bd; | ||
1395 | unsigned char board_id = 0; | ||
1396 | |||
1397 | #ifdef ENABLE_PCI | ||
1398 | int pci_boards_found, pci_count; | ||
1399 | |||
1400 | pci_count = 0; | ||
1401 | #endif /* ENABLE_PCI */ | ||
1402 | |||
1403 | pc_driver = alloc_tty_driver(MAX_ALLOC); | ||
1404 | if (!pc_driver) | ||
1405 | return -ENOMEM; | ||
1406 | |||
1407 | pc_info = alloc_tty_driver(MAX_ALLOC); | ||
1408 | if (!pc_info) { | ||
1409 | put_tty_driver(pc_driver); | ||
1410 | return -ENOMEM; | ||
1411 | } | ||
1412 | |||
1413 | /* ----------------------------------------------------------------------- | ||
1414 | If epca_setup has not been ran by LILO set num_cards to defaults; copy | ||
1415 | board structure defined by digiConfig into drivers board structure. | ||
1416 | Note : If LILO has ran epca_setup then epca_setup will handle defining | ||
1417 | num_cards as well as copying the data into the board structure. | ||
1418 | -------------------------------------------------------------------------- */ | ||
1419 | if (!liloconfig) | ||
1420 | { /* Begin driver has been configured via. epcaconfig */ | ||
1421 | |||
1422 | nbdevs = NBDEVS; | ||
1423 | num_cards = NUMCARDS; | ||
1424 | memcpy((void *)&boards, (void *)&static_boards, | ||
1425 | (sizeof(struct board_info) * NUMCARDS)); | ||
1426 | } /* End driver has been configured via. epcaconfig */ | ||
1427 | |||
1428 | /* ----------------------------------------------------------------- | ||
1429 | Note : If lilo was used to configure the driver and the | ||
1430 | ignore epcaconfig option was choosen (digiepca=2) then | ||
1431 | nbdevs and num_cards will equal 0 at this point. This is | ||
1432 | okay; PCI cards will still be picked up if detected. | ||
1433 | --------------------------------------------------------------------- */ | ||
1434 | |||
1435 | /* ----------------------------------------------------------- | ||
1436 | Set up interrupt, we will worry about memory allocation in | ||
1437 | post_fep_init. | ||
1438 | --------------------------------------------------------------- */ | ||
1439 | |||
1440 | |||
1441 | printk(KERN_INFO "DIGI epca driver version %s loaded.\n",VERSION); | ||
1442 | |||
1443 | #ifdef ENABLE_PCI | ||
1444 | |||
1445 | /* ------------------------------------------------------------------ | ||
1446 | NOTE : This code assumes that the number of ports found in | ||
1447 | the boards array is correct. This could be wrong if | ||
1448 | the card in question is PCI (And therefore has no ports | ||
1449 | entry in the boards structure.) The rest of the | ||
1450 | information will be valid for PCI because the beginning | ||
1451 | of pc_init scans for PCI and determines i/o and base | ||
1452 | memory addresses. I am not sure if it is possible to | ||
1453 | read the number of ports supported by the card prior to | ||
1454 | it being booted (Since that is the state it is in when | ||
1455 | pc_init is run). Because it is not possible to query the | ||
1456 | number of supported ports until after the card has booted; | ||
1457 | we are required to calculate the card_ptrs as the card is | ||
1458 | is initialized (Inside post_fep_init). The negative thing | ||
1459 | about this approach is that digiDload's call to GET_INFO | ||
1460 | will have a bad port value. (Since this is called prior | ||
1461 | to post_fep_init.) | ||
1462 | |||
1463 | --------------------------------------------------------------------- */ | ||
1464 | |||
1465 | pci_boards_found = 0; | ||
1466 | if(num_cards < MAXBOARDS) | ||
1467 | pci_boards_found += init_PCI(); | ||
1468 | num_cards += pci_boards_found; | ||
1469 | |||
1470 | #endif /* ENABLE_PCI */ | ||
1471 | |||
1472 | pc_driver->owner = THIS_MODULE; | ||
1473 | pc_driver->name = "ttyD"; | ||
1474 | pc_driver->devfs_name = "tts/D"; | ||
1475 | pc_driver->major = DIGI_MAJOR; | ||
1476 | pc_driver->minor_start = 0; | ||
1477 | pc_driver->type = TTY_DRIVER_TYPE_SERIAL; | ||
1478 | pc_driver->subtype = SERIAL_TYPE_NORMAL; | ||
1479 | pc_driver->init_termios = tty_std_termios; | ||
1480 | pc_driver->init_termios.c_iflag = 0; | ||
1481 | pc_driver->init_termios.c_oflag = 0; | ||
1482 | pc_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL; | ||
1483 | pc_driver->init_termios.c_lflag = 0; | ||
1484 | pc_driver->flags = TTY_DRIVER_REAL_RAW; | ||
1485 | tty_set_operations(pc_driver, &pc_ops); | ||
1486 | |||
1487 | pc_info->owner = THIS_MODULE; | ||
1488 | pc_info->name = "digi_ctl"; | ||
1489 | pc_info->major = DIGIINFOMAJOR; | ||
1490 | pc_info->minor_start = 0; | ||
1491 | pc_info->type = TTY_DRIVER_TYPE_SERIAL; | ||
1492 | pc_info->subtype = SERIAL_TYPE_INFO; | ||
1493 | pc_info->init_termios = tty_std_termios; | ||
1494 | pc_info->init_termios.c_iflag = 0; | ||
1495 | pc_info->init_termios.c_oflag = 0; | ||
1496 | pc_info->init_termios.c_lflag = 0; | ||
1497 | pc_info->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL; | ||
1498 | pc_info->flags = TTY_DRIVER_REAL_RAW; | ||
1499 | tty_set_operations(pc_info, &info_ops); | ||
1500 | |||
1501 | |||
1502 | save_flags(flags); | ||
1503 | cli(); | ||
1504 | |||
1505 | for (crd = 0; crd < num_cards; crd++) | ||
1506 | { /* Begin for each card */ | ||
1507 | |||
1508 | /* ------------------------------------------------------------------ | ||
1509 | This is where the appropriate memory handlers for the hardware is | ||
1510 | set. Everything at runtime blindly jumps through these vectors. | ||
1511 | ---------------------------------------------------------------------- */ | ||
1512 | |||
1513 | /* defined in epcaconfig.h */ | ||
1514 | bd = &boards[crd]; | ||
1515 | |||
1516 | switch (bd->type) | ||
1517 | { /* Begin switch on bd->type {board type} */ | ||
1518 | case PCXEM: | ||
1519 | case EISAXEM: | ||
1520 | bd->memwinon = pcxem_memwinon ; | ||
1521 | bd->memwinoff = pcxem_memwinoff ; | ||
1522 | bd->globalwinon = pcxem_globalwinon ; | ||
1523 | bd->txwinon = pcxem_txwinon ; | ||
1524 | bd->rxwinon = pcxem_rxwinon ; | ||
1525 | bd->memoff = pcxem_memoff ; | ||
1526 | bd->assertgwinon = dummy_assertgwinon; | ||
1527 | bd->assertmemoff = dummy_assertmemoff; | ||
1528 | break; | ||
1529 | |||
1530 | case PCIXEM: | ||
1531 | case PCIXRJ: | ||
1532 | case PCIXR: | ||
1533 | bd->memwinon = dummy_memwinon; | ||
1534 | bd->memwinoff = dummy_memwinoff; | ||
1535 | bd->globalwinon = dummy_globalwinon; | ||
1536 | bd->txwinon = dummy_txwinon; | ||
1537 | bd->rxwinon = dummy_rxwinon; | ||
1538 | bd->memoff = dummy_memoff; | ||
1539 | bd->assertgwinon = dummy_assertgwinon; | ||
1540 | bd->assertmemoff = dummy_assertmemoff; | ||
1541 | break; | ||
1542 | |||
1543 | case PCXE: | ||
1544 | case PCXEVE: | ||
1545 | |||
1546 | bd->memwinon = pcxe_memwinon; | ||
1547 | bd->memwinoff = pcxe_memwinoff; | ||
1548 | bd->globalwinon = pcxe_globalwinon; | ||
1549 | bd->txwinon = pcxe_txwinon; | ||
1550 | bd->rxwinon = pcxe_rxwinon; | ||
1551 | bd->memoff = pcxe_memoff; | ||
1552 | bd->assertgwinon = dummy_assertgwinon; | ||
1553 | bd->assertmemoff = dummy_assertmemoff; | ||
1554 | break; | ||
1555 | |||
1556 | case PCXI: | ||
1557 | case PC64XE: | ||
1558 | |||
1559 | bd->memwinon = pcxi_memwinon; | ||
1560 | bd->memwinoff = pcxi_memwinoff; | ||
1561 | bd->globalwinon = pcxi_globalwinon; | ||
1562 | bd->txwinon = pcxi_txwinon; | ||
1563 | bd->rxwinon = pcxi_rxwinon; | ||
1564 | bd->memoff = pcxi_memoff; | ||
1565 | bd->assertgwinon = pcxi_assertgwinon; | ||
1566 | bd->assertmemoff = pcxi_assertmemoff; | ||
1567 | break; | ||
1568 | |||
1569 | default: | ||
1570 | break; | ||
1571 | |||
1572 | } /* End switch on bd->type */ | ||
1573 | |||
1574 | /* --------------------------------------------------------------- | ||
1575 | Some cards need a memory segment to be defined for use in | ||
1576 | transmit and receive windowing operations. These boards | ||
1577 | are listed in the below switch. In the case of the XI the | ||
1578 | amount of memory on the board is variable so the memory_seg | ||
1579 | is also variable. This code determines what they segment | ||
1580 | should be. | ||
1581 | ----------------------------------------------------------------- */ | ||
1582 | |||
1583 | switch (bd->type) | ||
1584 | { /* Begin switch on bd->type {board type} */ | ||
1585 | |||
1586 | case PCXE: | ||
1587 | case PCXEVE: | ||
1588 | case PC64XE: | ||
1589 | bd->memory_seg = 0xf000; | ||
1590 | break; | ||
1591 | |||
1592 | case PCXI: | ||
1593 | board_id = inb((int)bd->port); | ||
1594 | if ((board_id & 0x1) == 0x1) | ||
1595 | { /* Begin it's an XI card */ | ||
1596 | |||
1597 | /* Is it a 64K board */ | ||
1598 | if ((board_id & 0x30) == 0) | ||
1599 | bd->memory_seg = 0xf000; | ||
1600 | |||
1601 | /* Is it a 128K board */ | ||
1602 | if ((board_id & 0x30) == 0x10) | ||
1603 | bd->memory_seg = 0xe000; | ||
1604 | |||
1605 | /* Is is a 256K board */ | ||
1606 | if ((board_id & 0x30) == 0x20) | ||
1607 | bd->memory_seg = 0xc000; | ||
1608 | |||
1609 | /* Is it a 512K board */ | ||
1610 | if ((board_id & 0x30) == 0x30) | ||
1611 | bd->memory_seg = 0x8000; | ||
1612 | |||
1613 | } /* End it is an XI card */ | ||
1614 | else | ||
1615 | { | ||
1616 | printk(KERN_ERR "<Error> - Board at 0x%x doesn't appear to be an XI\n",(int)bd->port); | ||
1617 | } | ||
1618 | break; | ||
1619 | |||
1620 | } /* End switch on bd->type */ | ||
1621 | |||
1622 | } /* End for each card */ | ||
1623 | |||
1624 | if (tty_register_driver(pc_driver)) | ||
1625 | panic("Couldn't register Digi PC/ driver"); | ||
1626 | |||
1627 | if (tty_register_driver(pc_info)) | ||
1628 | panic("Couldn't register Digi PC/ info "); | ||
1629 | |||
1630 | /* ------------------------------------------------------------------- | ||
1631 | Start up the poller to check for events on all enabled boards | ||
1632 | ---------------------------------------------------------------------- */ | ||
1633 | |||
1634 | init_timer(&epca_timer); | ||
1635 | epca_timer.function = epcapoll; | ||
1636 | mod_timer(&epca_timer, jiffies + HZ/25); | ||
1637 | |||
1638 | restore_flags(flags); | ||
1639 | |||
1640 | return 0; | ||
1641 | |||
1642 | } /* End pc_init */ | ||
1643 | |||
1644 | /* ------------------ Begin post_fep_init ---------------------- */ | ||
1645 | |||
1646 | static void post_fep_init(unsigned int crd) | ||
1647 | { /* Begin post_fep_init */ | ||
1648 | |||
1649 | int i; | ||
1650 | unchar *memaddr; | ||
1651 | volatile struct global_data *gd; | ||
1652 | struct board_info *bd; | ||
1653 | volatile struct board_chan *bc; | ||
1654 | struct channel *ch; | ||
1655 | int shrinkmem = 0, lowwater ; | ||
1656 | |||
1657 | /* ------------------------------------------------------------- | ||
1658 | This call is made by the user via. the ioctl call DIGI_INIT. | ||
1659 | It is responsible for setting up all the card specific stuff. | ||
1660 | ---------------------------------------------------------------- */ | ||
1661 | bd = &boards[crd]; | ||
1662 | |||
1663 | /* ----------------------------------------------------------------- | ||
1664 | If this is a PCI board, get the port info. Remember PCI cards | ||
1665 | do not have entries into the epcaconfig.h file, so we can't get | ||
1666 | the number of ports from it. Unfortunetly, this means that anyone | ||
1667 | doing a DIGI_GETINFO before the board has booted will get an invalid | ||
1668 | number of ports returned (It should return 0). Calls to DIGI_GETINFO | ||
1669 | after DIGI_INIT has been called will return the proper values. | ||
1670 | ------------------------------------------------------------------- */ | ||
1671 | |||
1672 | if (bd->type >= PCIXEM) /* If the board in question is PCI */ | ||
1673 | { /* Begin get PCI number of ports */ | ||
1674 | |||
1675 | /* -------------------------------------------------------------------- | ||
1676 | Below we use XEMPORTS as a memory offset regardless of which PCI | ||
1677 | card it is. This is because all of the supported PCI cards have | ||
1678 | the same memory offset for the channel data. This will have to be | ||
1679 | changed if we ever develop a PCI/XE card. NOTE : The FEP manual | ||
1680 | states that the port offset is 0xC22 as opposed to 0xC02. This is | ||
1681 | only true for PC/XE, and PC/XI cards; not for the XEM, or CX series. | ||
1682 | On the PCI cards the number of ports is determined by reading a | ||
1683 | ID PROM located in the box attached to the card. The card can then | ||
1684 | determine the index the id to determine the number of ports available. | ||
1685 | (FYI - The id should be located at 0x1ac (And may use up to 4 bytes | ||
1686 | if the box in question is a XEM or CX)). | ||
1687 | ------------------------------------------------------------------------ */ | ||
1688 | |||
1689 | bd->numports = (unsigned short)*(unsigned char *)bus_to_virt((unsigned long) | ||
1690 | (bd->re_map_membase + XEMPORTS)); | ||
1691 | |||
1692 | |||
1693 | epcaassert(bd->numports <= 64,"PCI returned a invalid number of ports"); | ||
1694 | nbdevs += (bd->numports); | ||
1695 | |||
1696 | } /* End get PCI number of ports */ | ||
1697 | |||
1698 | if (crd != 0) | ||
1699 | card_ptr[crd] = card_ptr[crd-1] + boards[crd-1].numports; | ||
1700 | else | ||
1701 | card_ptr[crd] = &digi_channels[crd]; /* <- For card 0 only */ | ||
1702 | |||
1703 | ch = card_ptr[crd]; | ||
1704 | |||
1705 | |||
1706 | epcaassert(ch <= &digi_channels[nbdevs - 1], "ch out of range"); | ||
1707 | |||
1708 | memaddr = (unchar *)bd->re_map_membase; | ||
1709 | |||
1710 | /* | ||
1711 | The below command is necessary because newer kernels (2.1.x and | ||
1712 | up) do not have a 1:1 virtual to physical mapping. The below | ||
1713 | call adjust for that. | ||
1714 | */ | ||
1715 | |||
1716 | memaddr = (unsigned char *)bus_to_virt((unsigned long)memaddr); | ||
1717 | |||
1718 | /* ----------------------------------------------------------------- | ||
1719 | The below assignment will set bc to point at the BEGINING of | ||
1720 | the cards channel structures. For 1 card there will be between | ||
1721 | 8 and 64 of these structures. | ||
1722 | -------------------------------------------------------------------- */ | ||
1723 | |||
1724 | bc = (volatile struct board_chan *)((ulong)memaddr + CHANSTRUCT); | ||
1725 | |||
1726 | /* ------------------------------------------------------------------- | ||
1727 | The below assignment will set gd to point at the BEGINING of | ||
1728 | global memory address 0xc00. The first data in that global | ||
1729 | memory actually starts at address 0xc1a. The command in | ||
1730 | pointer begins at 0xd10. | ||
1731 | ---------------------------------------------------------------------- */ | ||
1732 | |||
1733 | gd = (volatile struct global_data *)((ulong)memaddr + GLOBAL); | ||
1734 | |||
1735 | /* -------------------------------------------------------------------- | ||
1736 | XEPORTS (address 0xc22) points at the number of channels the | ||
1737 | card supports. (For 64XE, XI, XEM, and XR use 0xc02) | ||
1738 | ----------------------------------------------------------------------- */ | ||
1739 | |||
1740 | if (((bd->type == PCXEVE) | (bd->type == PCXE)) && | ||
1741 | (*(ushort *)((ulong)memaddr + XEPORTS) < 3)) | ||
1742 | shrinkmem = 1; | ||
1743 | if (bd->type < PCIXEM) | ||
1744 | if (!request_region((int)bd->port, 4, board_desc[bd->type])) | ||
1745 | return; | ||
1746 | |||
1747 | memwinon(bd, 0); | ||
1748 | |||
1749 | /* -------------------------------------------------------------------- | ||
1750 | Remember ch is the main drivers channels structure, while bc is | ||
1751 | the cards channel structure. | ||
1752 | ------------------------------------------------------------------------ */ | ||
1753 | |||
1754 | /* For every port on the card do ..... */ | ||
1755 | |||
1756 | for (i = 0; i < bd->numports; i++, ch++, bc++) | ||
1757 | { /* Begin for each port */ | ||
1758 | |||
1759 | ch->brdchan = bc; | ||
1760 | ch->mailbox = gd; | ||
1761 | INIT_WORK(&ch->tqueue, do_softint, ch); | ||
1762 | ch->board = &boards[crd]; | ||
1763 | |||
1764 | switch (bd->type) | ||
1765 | { /* Begin switch bd->type */ | ||
1766 | |||
1767 | /* ---------------------------------------------------------------- | ||
1768 | Since some of the boards use different bitmaps for their | ||
1769 | control signals we cannot hard code these values and retain | ||
1770 | portability. We virtualize this data here. | ||
1771 | ------------------------------------------------------------------- */ | ||
1772 | case EISAXEM: | ||
1773 | case PCXEM: | ||
1774 | case PCIXEM: | ||
1775 | case PCIXRJ: | ||
1776 | case PCIXR: | ||
1777 | ch->m_rts = 0x02 ; | ||
1778 | ch->m_dcd = 0x80 ; | ||
1779 | ch->m_dsr = 0x20 ; | ||
1780 | ch->m_cts = 0x10 ; | ||
1781 | ch->m_ri = 0x40 ; | ||
1782 | ch->m_dtr = 0x01 ; | ||
1783 | break; | ||
1784 | |||
1785 | case PCXE: | ||
1786 | case PCXEVE: | ||
1787 | case PCXI: | ||
1788 | case PC64XE: | ||
1789 | ch->m_rts = 0x02 ; | ||
1790 | ch->m_dcd = 0x08 ; | ||
1791 | ch->m_dsr = 0x10 ; | ||
1792 | ch->m_cts = 0x20 ; | ||
1793 | ch->m_ri = 0x40 ; | ||
1794 | ch->m_dtr = 0x80 ; | ||
1795 | break; | ||
1796 | |||
1797 | } /* End switch bd->type */ | ||
1798 | |||
1799 | if (boards[crd].altpin) | ||
1800 | { | ||
1801 | ch->dsr = ch->m_dcd; | ||
1802 | ch->dcd = ch->m_dsr; | ||
1803 | ch->digiext.digi_flags |= DIGI_ALTPIN; | ||
1804 | } | ||
1805 | else | ||
1806 | { | ||
1807 | ch->dcd = ch->m_dcd; | ||
1808 | ch->dsr = ch->m_dsr; | ||
1809 | } | ||
1810 | |||
1811 | ch->boardnum = crd; | ||
1812 | ch->channelnum = i; | ||
1813 | ch->magic = EPCA_MAGIC; | ||
1814 | ch->tty = NULL; | ||
1815 | |||
1816 | if (shrinkmem) | ||
1817 | { | ||
1818 | fepcmd(ch, SETBUFFER, 32, 0, 0, 0); | ||
1819 | shrinkmem = 0; | ||
1820 | } | ||
1821 | |||
1822 | switch (bd->type) | ||
1823 | { /* Begin switch bd->type */ | ||
1824 | |||
1825 | case PCIXEM: | ||
1826 | case PCIXRJ: | ||
1827 | case PCIXR: | ||
1828 | /* Cover all the 2MEG cards */ | ||
1829 | ch->txptr = memaddr + (((bc->tseg) << 4) & 0x1fffff); | ||
1830 | ch->rxptr = memaddr + (((bc->rseg) << 4) & 0x1fffff); | ||
1831 | ch->txwin = FEPWIN | ((bc->tseg) >> 11); | ||
1832 | ch->rxwin = FEPWIN | ((bc->rseg) >> 11); | ||
1833 | break; | ||
1834 | |||
1835 | case PCXEM: | ||
1836 | case EISAXEM: | ||
1837 | /* Cover all the 32K windowed cards */ | ||
1838 | /* Mask equal to window size - 1 */ | ||
1839 | ch->txptr = memaddr + (((bc->tseg) << 4) & 0x7fff); | ||
1840 | ch->rxptr = memaddr + (((bc->rseg) << 4) & 0x7fff); | ||
1841 | ch->txwin = FEPWIN | ((bc->tseg) >> 11); | ||
1842 | ch->rxwin = FEPWIN | ((bc->rseg) >> 11); | ||
1843 | break; | ||
1844 | |||
1845 | case PCXEVE: | ||
1846 | case PCXE: | ||
1847 | ch->txptr = memaddr + (((bc->tseg - bd->memory_seg) << 4) & 0x1fff); | ||
1848 | ch->txwin = FEPWIN | ((bc->tseg - bd->memory_seg) >> 9); | ||
1849 | ch->rxptr = memaddr + (((bc->rseg - bd->memory_seg) << 4) & 0x1fff); | ||
1850 | ch->rxwin = FEPWIN | ((bc->rseg - bd->memory_seg) >>9 ); | ||
1851 | break; | ||
1852 | |||
1853 | case PCXI: | ||
1854 | case PC64XE: | ||
1855 | ch->txptr = memaddr + ((bc->tseg - bd->memory_seg) << 4); | ||
1856 | ch->rxptr = memaddr + ((bc->rseg - bd->memory_seg) << 4); | ||
1857 | ch->txwin = ch->rxwin = 0; | ||
1858 | break; | ||
1859 | |||
1860 | } /* End switch bd->type */ | ||
1861 | |||
1862 | ch->txbufhead = 0; | ||
1863 | ch->txbufsize = bc->tmax + 1; | ||
1864 | |||
1865 | ch->rxbufhead = 0; | ||
1866 | ch->rxbufsize = bc->rmax + 1; | ||
1867 | |||
1868 | lowwater = ch->txbufsize >= 2000 ? 1024 : (ch->txbufsize / 2); | ||
1869 | |||
1870 | /* Set transmitter low water mark */ | ||
1871 | fepcmd(ch, STXLWATER, lowwater, 0, 10, 0); | ||
1872 | |||
1873 | /* Set receiver low water mark */ | ||
1874 | |||
1875 | fepcmd(ch, SRXLWATER, (ch->rxbufsize / 4), 0, 10, 0); | ||
1876 | |||
1877 | /* Set receiver high water mark */ | ||
1878 | |||
1879 | fepcmd(ch, SRXHWATER, (3 * ch->rxbufsize / 4), 0, 10, 0); | ||
1880 | |||
1881 | bc->edelay = 100; | ||
1882 | bc->idata = 1; | ||
1883 | |||
1884 | ch->startc = bc->startc; | ||
1885 | ch->stopc = bc->stopc; | ||
1886 | ch->startca = bc->startca; | ||
1887 | ch->stopca = bc->stopca; | ||
1888 | |||
1889 | ch->fepcflag = 0; | ||
1890 | ch->fepiflag = 0; | ||
1891 | ch->fepoflag = 0; | ||
1892 | ch->fepstartc = 0; | ||
1893 | ch->fepstopc = 0; | ||
1894 | ch->fepstartca = 0; | ||
1895 | ch->fepstopca = 0; | ||
1896 | |||
1897 | ch->close_delay = 50; | ||
1898 | ch->count = 0; | ||
1899 | ch->blocked_open = 0; | ||
1900 | init_waitqueue_head(&ch->open_wait); | ||
1901 | init_waitqueue_head(&ch->close_wait); | ||
1902 | ch->tmp_buf = kmalloc(ch->txbufsize,GFP_KERNEL); | ||
1903 | if (!(ch->tmp_buf)) | ||
1904 | { | ||
1905 | printk(KERN_ERR "POST FEP INIT : kmalloc failed for port 0x%x\n",i); | ||
1906 | release_region((int)bd->port, 4); | ||
1907 | while(i-- > 0) | ||
1908 | kfree((ch--)->tmp_buf); | ||
1909 | return; | ||
1910 | } | ||
1911 | else | ||
1912 | memset((void *)ch->tmp_buf,0,ch->txbufsize); | ||
1913 | } /* End for each port */ | ||
1914 | |||
1915 | printk(KERN_INFO | ||
1916 | "Digi PC/Xx Driver V%s: %s I/O = 0x%lx Mem = 0x%lx Ports = %d\n", | ||
1917 | VERSION, board_desc[bd->type], (long)bd->port, (long)bd->membase, bd->numports); | ||
1918 | sprintf(mesg, | ||
1919 | "Digi PC/Xx Driver V%s: %s I/O = 0x%lx Mem = 0x%lx Ports = %d\n", | ||
1920 | VERSION, board_desc[bd->type], (long)bd->port, (long)bd->membase, bd->numports); | ||
1921 | console_print(mesg); | ||
1922 | |||
1923 | memwinoff(bd, 0); | ||
1924 | |||
1925 | } /* End post_fep_init */ | ||
1926 | |||
1927 | /* --------------------- Begin epcapoll ------------------------ */ | ||
1928 | |||
1929 | static void epcapoll(unsigned long ignored) | ||
1930 | { /* Begin epcapoll */ | ||
1931 | |||
1932 | unsigned long flags; | ||
1933 | int crd; | ||
1934 | volatile unsigned int head, tail; | ||
1935 | struct channel *ch; | ||
1936 | struct board_info *bd; | ||
1937 | |||
1938 | /* ------------------------------------------------------------------- | ||
1939 | This routine is called upon every timer interrupt. Even though | ||
1940 | the Digi series cards are capable of generating interrupts this | ||
1941 | method of non-looping polling is more efficient. This routine | ||
1942 | checks for card generated events (Such as receive data, are transmit | ||
1943 | buffer empty) and acts on those events. | ||
1944 | ----------------------------------------------------------------------- */ | ||
1945 | |||
1946 | save_flags(flags); | ||
1947 | cli(); | ||
1948 | |||
1949 | for (crd = 0; crd < num_cards; crd++) | ||
1950 | { /* Begin for each card */ | ||
1951 | |||
1952 | bd = &boards[crd]; | ||
1953 | ch = card_ptr[crd]; | ||
1954 | |||
1955 | if ((bd->status == DISABLED) || digi_poller_inhibited) | ||
1956 | continue; /* Begin loop next interation */ | ||
1957 | |||
1958 | /* ----------------------------------------------------------- | ||
1959 | assertmemoff is not needed here; indeed it is an empty subroutine. | ||
1960 | It is being kept because future boards may need this as well as | ||
1961 | some legacy boards. | ||
1962 | ---------------------------------------------------------------- */ | ||
1963 | |||
1964 | assertmemoff(ch); | ||
1965 | |||
1966 | globalwinon(ch); | ||
1967 | |||
1968 | /* --------------------------------------------------------------- | ||
1969 | In this case head and tail actually refer to the event queue not | ||
1970 | the transmit or receive queue. | ||
1971 | ------------------------------------------------------------------- */ | ||
1972 | |||
1973 | head = ch->mailbox->ein; | ||
1974 | tail = ch->mailbox->eout; | ||
1975 | |||
1976 | /* If head isn't equal to tail we have an event */ | ||
1977 | |||
1978 | if (head != tail) | ||
1979 | doevent(crd); | ||
1980 | |||
1981 | memoff(ch); | ||
1982 | |||
1983 | } /* End for each card */ | ||
1984 | |||
1985 | mod_timer(&epca_timer, jiffies + (HZ / 25)); | ||
1986 | |||
1987 | restore_flags(flags); | ||
1988 | } /* End epcapoll */ | ||
1989 | |||
1990 | /* --------------------- Begin doevent ------------------------ */ | ||
1991 | |||
1992 | static void doevent(int crd) | ||
1993 | { /* Begin doevent */ | ||
1994 | |||
1995 | volatile unchar *eventbuf; | ||
1996 | struct channel *ch, *chan0; | ||
1997 | static struct tty_struct *tty; | ||
1998 | volatile struct board_info *bd; | ||
1999 | volatile struct board_chan *bc; | ||
2000 | register volatile unsigned int tail, head; | ||
2001 | register int event, channel; | ||
2002 | register int mstat, lstat; | ||
2003 | |||
2004 | /* ------------------------------------------------------------------- | ||
2005 | This subroutine is called by epcapoll when an event is detected | ||
2006 | in the event queue. This routine responds to those events. | ||
2007 | --------------------------------------------------------------------- */ | ||
2008 | |||
2009 | bd = &boards[crd]; | ||
2010 | |||
2011 | chan0 = card_ptr[crd]; | ||
2012 | epcaassert(chan0 <= &digi_channels[nbdevs - 1], "ch out of range"); | ||
2013 | |||
2014 | assertgwinon(chan0); | ||
2015 | |||
2016 | while ((tail = chan0->mailbox->eout) != (head = chan0->mailbox->ein)) | ||
2017 | { /* Begin while something in event queue */ | ||
2018 | |||
2019 | assertgwinon(chan0); | ||
2020 | |||
2021 | eventbuf = (volatile unchar *)bus_to_virt((ulong)(bd->re_map_membase + tail + ISTART)); | ||
2022 | |||
2023 | /* Get the channel the event occurred on */ | ||
2024 | channel = eventbuf[0]; | ||
2025 | |||
2026 | /* Get the actual event code that occurred */ | ||
2027 | event = eventbuf[1]; | ||
2028 | |||
2029 | /* ---------------------------------------------------------------- | ||
2030 | The two assignments below get the current modem status (mstat) | ||
2031 | and the previous modem status (lstat). These are useful becuase | ||
2032 | an event could signal a change in modem signals itself. | ||
2033 | ------------------------------------------------------------------- */ | ||
2034 | |||
2035 | mstat = eventbuf[2]; | ||
2036 | lstat = eventbuf[3]; | ||
2037 | |||
2038 | ch = chan0 + channel; | ||
2039 | |||
2040 | if ((unsigned)channel >= bd->numports || !ch) | ||
2041 | { | ||
2042 | if (channel >= bd->numports) | ||
2043 | ch = chan0; | ||
2044 | bc = ch->brdchan; | ||
2045 | goto next; | ||
2046 | } | ||
2047 | |||
2048 | if ((bc = ch->brdchan) == NULL) | ||
2049 | goto next; | ||
2050 | |||
2051 | if (event & DATA_IND) | ||
2052 | { /* Begin DATA_IND */ | ||
2053 | |||
2054 | receive_data(ch); | ||
2055 | assertgwinon(ch); | ||
2056 | |||
2057 | } /* End DATA_IND */ | ||
2058 | /* else *//* Fix for DCD transition missed bug */ | ||
2059 | if (event & MODEMCHG_IND) | ||
2060 | { /* Begin MODEMCHG_IND */ | ||
2061 | |||
2062 | /* A modem signal change has been indicated */ | ||
2063 | |||
2064 | ch->imodem = mstat; | ||
2065 | |||
2066 | if (ch->asyncflags & ASYNC_CHECK_CD) | ||
2067 | { | ||
2068 | if (mstat & ch->dcd) /* We are now receiving dcd */ | ||
2069 | wake_up_interruptible(&ch->open_wait); | ||
2070 | else | ||
2071 | pc_sched_event(ch, EPCA_EVENT_HANGUP); /* No dcd; hangup */ | ||
2072 | } | ||
2073 | |||
2074 | } /* End MODEMCHG_IND */ | ||
2075 | |||
2076 | tty = ch->tty; | ||
2077 | if (tty) | ||
2078 | { /* Begin if valid tty */ | ||
2079 | |||
2080 | if (event & BREAK_IND) | ||
2081 | { /* Begin if BREAK_IND */ | ||
2082 | |||
2083 | /* A break has been indicated */ | ||
2084 | |||
2085 | tty->flip.count++; | ||
2086 | *tty->flip.flag_buf_ptr++ = TTY_BREAK; | ||
2087 | |||
2088 | *tty->flip.char_buf_ptr++ = 0; | ||
2089 | |||
2090 | tty_schedule_flip(tty); | ||
2091 | |||
2092 | } /* End if BREAK_IND */ | ||
2093 | else | ||
2094 | if (event & LOWTX_IND) | ||
2095 | { /* Begin LOWTX_IND */ | ||
2096 | |||
2097 | if (ch->statusflags & LOWWAIT) | ||
2098 | { /* Begin if LOWWAIT */ | ||
2099 | |||
2100 | ch->statusflags &= ~LOWWAIT; | ||
2101 | tty_wakeup(tty); | ||
2102 | wake_up_interruptible(&tty->write_wait); | ||
2103 | |||
2104 | } /* End if LOWWAIT */ | ||
2105 | |||
2106 | } /* End LOWTX_IND */ | ||
2107 | else | ||
2108 | if (event & EMPTYTX_IND) | ||
2109 | { /* Begin EMPTYTX_IND */ | ||
2110 | |||
2111 | /* This event is generated by setup_empty_event */ | ||
2112 | |||
2113 | ch->statusflags &= ~TXBUSY; | ||
2114 | if (ch->statusflags & EMPTYWAIT) | ||
2115 | { /* Begin if EMPTYWAIT */ | ||
2116 | |||
2117 | ch->statusflags &= ~EMPTYWAIT; | ||
2118 | tty_wakeup(tty); | ||
2119 | |||
2120 | wake_up_interruptible(&tty->write_wait); | ||
2121 | |||
2122 | } /* End if EMPTYWAIT */ | ||
2123 | |||
2124 | } /* End EMPTYTX_IND */ | ||
2125 | |||
2126 | } /* End if valid tty */ | ||
2127 | |||
2128 | |||
2129 | next: | ||
2130 | globalwinon(ch); | ||
2131 | |||
2132 | if (!bc) | ||
2133 | printk(KERN_ERR "<Error> - bc == NULL in doevent!\n"); | ||
2134 | else | ||
2135 | bc->idata = 1; | ||
2136 | |||
2137 | chan0->mailbox->eout = (tail + 4) & (IMAX - ISTART - 4); | ||
2138 | globalwinon(chan0); | ||
2139 | |||
2140 | } /* End while something in event queue */ | ||
2141 | |||
2142 | } /* End doevent */ | ||
2143 | |||
2144 | /* --------------------- Begin fepcmd ------------------------ */ | ||
2145 | |||
2146 | static void fepcmd(struct channel *ch, int cmd, int word_or_byte, | ||
2147 | int byte2, int ncmds, int bytecmd) | ||
2148 | { /* Begin fepcmd */ | ||
2149 | |||
2150 | unchar *memaddr; | ||
2151 | unsigned int head, cmdTail, cmdStart, cmdMax; | ||
2152 | long count; | ||
2153 | int n; | ||
2154 | |||
2155 | /* This is the routine in which commands may be passed to the card. */ | ||
2156 | |||
2157 | if (ch->board->status == DISABLED) | ||
2158 | { | ||
2159 | return; | ||
2160 | } | ||
2161 | |||
2162 | assertgwinon(ch); | ||
2163 | |||
2164 | /* Remember head (As well as max) is just an offset not a base addr */ | ||
2165 | head = ch->mailbox->cin; | ||
2166 | |||
2167 | /* cmdStart is a base address */ | ||
2168 | cmdStart = ch->mailbox->cstart; | ||
2169 | |||
2170 | /* ------------------------------------------------------------------ | ||
2171 | We do the addition below because we do not want a max pointer | ||
2172 | relative to cmdStart. We want a max pointer that points at the | ||
2173 | physical end of the command queue. | ||
2174 | -------------------------------------------------------------------- */ | ||
2175 | |||
2176 | cmdMax = (cmdStart + 4 + (ch->mailbox->cmax)); | ||
2177 | |||
2178 | memaddr = ch->board->re_map_membase; | ||
2179 | |||
2180 | /* | ||
2181 | The below command is necessary because newer kernels (2.1.x and | ||
2182 | up) do not have a 1:1 virtual to physical mapping. The below | ||
2183 | call adjust for that. | ||
2184 | */ | ||
2185 | |||
2186 | memaddr = (unsigned char *)bus_to_virt((unsigned long)memaddr); | ||
2187 | |||
2188 | if (head >= (cmdMax - cmdStart) || (head & 03)) | ||
2189 | { | ||
2190 | printk(KERN_ERR "line %d: Out of range, cmd = %x, head = %x\n", __LINE__, | ||
2191 | cmd, head); | ||
2192 | printk(KERN_ERR "line %d: Out of range, cmdMax = %x, cmdStart = %x\n", __LINE__, | ||
2193 | cmdMax, cmdStart); | ||
2194 | return; | ||
2195 | } | ||
2196 | |||
2197 | if (bytecmd) | ||
2198 | { | ||
2199 | *(volatile unchar *)(memaddr + head + cmdStart + 0) = (unchar)cmd; | ||
2200 | |||
2201 | *(volatile unchar *)(memaddr + head + cmdStart + 1) = (unchar)ch->channelnum; | ||
2202 | /* Below word_or_byte is bits to set */ | ||
2203 | *(volatile unchar *)(memaddr + head + cmdStart + 2) = (unchar)word_or_byte; | ||
2204 | /* Below byte2 is bits to reset */ | ||
2205 | *(volatile unchar *)(memaddr + head + cmdStart + 3) = (unchar)byte2; | ||
2206 | |||
2207 | } | ||
2208 | else | ||
2209 | { | ||
2210 | *(volatile unchar *)(memaddr + head + cmdStart + 0) = (unchar)cmd; | ||
2211 | *(volatile unchar *)(memaddr + head + cmdStart + 1) = (unchar)ch->channelnum; | ||
2212 | *(volatile ushort*)(memaddr + head + cmdStart + 2) = (ushort)word_or_byte; | ||
2213 | } | ||
2214 | |||
2215 | head = (head + 4) & (cmdMax - cmdStart - 4); | ||
2216 | ch->mailbox->cin = head; | ||
2217 | |||
2218 | count = FEPTIMEOUT; | ||
2219 | |||
2220 | for (;;) | ||
2221 | { /* Begin forever loop */ | ||
2222 | |||
2223 | count--; | ||
2224 | if (count == 0) | ||
2225 | { | ||
2226 | printk(KERN_ERR "<Error> - Fep not responding in fepcmd()\n"); | ||
2227 | return; | ||
2228 | } | ||
2229 | |||
2230 | head = ch->mailbox->cin; | ||
2231 | cmdTail = ch->mailbox->cout; | ||
2232 | |||
2233 | n = (head - cmdTail) & (cmdMax - cmdStart - 4); | ||
2234 | |||
2235 | /* ---------------------------------------------------------- | ||
2236 | Basically this will break when the FEP acknowledges the | ||
2237 | command by incrementing cmdTail (Making it equal to head). | ||
2238 | ------------------------------------------------------------- */ | ||
2239 | |||
2240 | if (n <= ncmds * (sizeof(short) * 4)) | ||
2241 | break; /* Well nearly forever :-) */ | ||
2242 | |||
2243 | } /* End forever loop */ | ||
2244 | |||
2245 | } /* End fepcmd */ | ||
2246 | |||
2247 | /* --------------------------------------------------------------------- | ||
2248 | Digi products use fields in their channels structures that are very | ||
2249 | similar to the c_cflag and c_iflag fields typically found in UNIX | ||
2250 | termios structures. The below three routines allow mappings | ||
2251 | between these hardware "flags" and their respective Linux flags. | ||
2252 | ------------------------------------------------------------------------- */ | ||
2253 | |||
2254 | /* --------------------- Begin termios2digi_h -------------------- */ | ||
2255 | |||
2256 | static unsigned termios2digi_h(struct channel *ch, unsigned cflag) | ||
2257 | { /* Begin termios2digi_h */ | ||
2258 | |||
2259 | unsigned res = 0; | ||
2260 | |||
2261 | if (cflag & CRTSCTS) | ||
2262 | { | ||
2263 | ch->digiext.digi_flags |= (RTSPACE | CTSPACE); | ||
2264 | res |= ((ch->m_cts) | (ch->m_rts)); | ||
2265 | } | ||
2266 | |||
2267 | if (ch->digiext.digi_flags & RTSPACE) | ||
2268 | res |= ch->m_rts; | ||
2269 | |||
2270 | if (ch->digiext.digi_flags & DTRPACE) | ||
2271 | res |= ch->m_dtr; | ||
2272 | |||
2273 | if (ch->digiext.digi_flags & CTSPACE) | ||
2274 | res |= ch->m_cts; | ||
2275 | |||
2276 | if (ch->digiext.digi_flags & DSRPACE) | ||
2277 | res |= ch->dsr; | ||
2278 | |||
2279 | if (ch->digiext.digi_flags & DCDPACE) | ||
2280 | res |= ch->dcd; | ||
2281 | |||
2282 | if (res & (ch->m_rts)) | ||
2283 | ch->digiext.digi_flags |= RTSPACE; | ||
2284 | |||
2285 | if (res & (ch->m_cts)) | ||
2286 | ch->digiext.digi_flags |= CTSPACE; | ||
2287 | |||
2288 | return res; | ||
2289 | |||
2290 | } /* End termios2digi_h */ | ||
2291 | |||
2292 | /* --------------------- Begin termios2digi_i -------------------- */ | ||
2293 | static unsigned termios2digi_i(struct channel *ch, unsigned iflag) | ||
2294 | { /* Begin termios2digi_i */ | ||
2295 | |||
2296 | unsigned res = iflag & (IGNBRK | BRKINT | IGNPAR | PARMRK | | ||
2297 | INPCK | ISTRIP|IXON|IXANY|IXOFF); | ||
2298 | |||
2299 | if (ch->digiext.digi_flags & DIGI_AIXON) | ||
2300 | res |= IAIXON; | ||
2301 | return res; | ||
2302 | |||
2303 | } /* End termios2digi_i */ | ||
2304 | |||
2305 | /* --------------------- Begin termios2digi_c -------------------- */ | ||
2306 | |||
2307 | static unsigned termios2digi_c(struct channel *ch, unsigned cflag) | ||
2308 | { /* Begin termios2digi_c */ | ||
2309 | |||
2310 | unsigned res = 0; | ||
2311 | |||
2312 | #ifdef SPEED_HACK | ||
2313 | /* CL: HACK to force 115200 at 38400 and 57600 at 19200 Baud */ | ||
2314 | if ((cflag & CBAUD)== B38400) cflag=cflag - B38400 + B115200; | ||
2315 | if ((cflag & CBAUD)== B19200) cflag=cflag - B19200 + B57600; | ||
2316 | #endif /* SPEED_HACK */ | ||
2317 | |||
2318 | if (cflag & CBAUDEX) | ||
2319 | { /* Begin detected CBAUDEX */ | ||
2320 | |||
2321 | ch->digiext.digi_flags |= DIGI_FAST; | ||
2322 | |||
2323 | /* ------------------------------------------------------------- | ||
2324 | HUPCL bit is used by FEP to indicate fast baud | ||
2325 | table is to be used. | ||
2326 | ----------------------------------------------------------------- */ | ||
2327 | |||
2328 | res |= FEP_HUPCL; | ||
2329 | |||
2330 | } /* End detected CBAUDEX */ | ||
2331 | else ch->digiext.digi_flags &= ~DIGI_FAST; | ||
2332 | |||
2333 | /* ------------------------------------------------------------------- | ||
2334 | CBAUD has bit position 0x1000 set these days to indicate Linux | ||
2335 | baud rate remap. Digi hardware can't handle the bit assignment. | ||
2336 | (We use a different bit assignment for high speed.). Clear this | ||
2337 | bit out. | ||
2338 | ---------------------------------------------------------------------- */ | ||
2339 | res |= cflag & ((CBAUD ^ CBAUDEX) | PARODD | PARENB | CSTOPB | CSIZE); | ||
2340 | |||
2341 | /* ------------------------------------------------------------- | ||
2342 | This gets a little confusing. The Digi cards have their own | ||
2343 | representation of c_cflags controling baud rate. For the most | ||
2344 | part this is identical to the Linux implementation. However; | ||
2345 | Digi supports one rate (76800) that Linux doesn't. This means | ||
2346 | that the c_cflag entry that would normally mean 76800 for Digi | ||
2347 | actually means 115200 under Linux. Without the below mapping, | ||
2348 | a stty 115200 would only drive the board at 76800. Since | ||
2349 | the rate 230400 is also found after 76800, the same problem afflicts | ||
2350 | us when we choose a rate of 230400. Without the below modificiation | ||
2351 | stty 230400 would actually give us 115200. | ||
2352 | |||
2353 | There are two additional differences. The Linux value for CLOCAL | ||
2354 | (0x800; 0004000) has no meaning to the Digi hardware. Also in | ||
2355 | later releases of Linux; the CBAUD define has CBAUDEX (0x1000; | ||
2356 | 0010000) ored into it (CBAUD = 0x100f as opposed to 0xf). CBAUDEX | ||
2357 | should be checked for a screened out prior to termios2digi_c | ||
2358 | returning. Since CLOCAL isn't used by the board this can be | ||
2359 | ignored as long as the returned value is used only by Digi hardware. | ||
2360 | ----------------------------------------------------------------- */ | ||
2361 | |||
2362 | if (cflag & CBAUDEX) | ||
2363 | { | ||
2364 | /* ------------------------------------------------------------- | ||
2365 | The below code is trying to guarantee that only baud rates | ||
2366 | 115200 and 230400 are remapped. We use exclusive or because | ||
2367 | the various baud rates share common bit positions and therefore | ||
2368 | can't be tested for easily. | ||
2369 | ----------------------------------------------------------------- */ | ||
2370 | |||
2371 | |||
2372 | if ((!((cflag & 0x7) ^ (B115200 & ~CBAUDEX))) || | ||
2373 | (!((cflag & 0x7) ^ (B230400 & ~CBAUDEX)))) | ||
2374 | { | ||
2375 | res += 1; | ||
2376 | } | ||
2377 | } | ||
2378 | |||
2379 | return res; | ||
2380 | |||
2381 | } /* End termios2digi_c */ | ||
2382 | |||
2383 | /* --------------------- Begin epcaparam ----------------------- */ | ||
2384 | |||
2385 | static void epcaparam(struct tty_struct *tty, struct channel *ch) | ||
2386 | { /* Begin epcaparam */ | ||
2387 | |||
2388 | unsigned int cmdHead; | ||
2389 | struct termios *ts; | ||
2390 | volatile struct board_chan *bc; | ||
2391 | unsigned mval, hflow, cflag, iflag; | ||
2392 | |||
2393 | bc = ch->brdchan; | ||
2394 | epcaassert(bc !=0, "bc out of range"); | ||
2395 | |||
2396 | assertgwinon(ch); | ||
2397 | |||
2398 | ts = tty->termios; | ||
2399 | |||
2400 | if ((ts->c_cflag & CBAUD) == 0) | ||
2401 | { /* Begin CBAUD detected */ | ||
2402 | |||
2403 | cmdHead = bc->rin; | ||
2404 | bc->rout = cmdHead; | ||
2405 | cmdHead = bc->tin; | ||
2406 | |||
2407 | /* Changing baud in mid-stream transmission can be wonderful */ | ||
2408 | /* --------------------------------------------------------------- | ||
2409 | Flush current transmit buffer by setting cmdTail pointer (tout) | ||
2410 | to cmdHead pointer (tin). Hopefully the transmit buffer is empty. | ||
2411 | ----------------------------------------------------------------- */ | ||
2412 | |||
2413 | fepcmd(ch, STOUT, (unsigned) cmdHead, 0, 0, 0); | ||
2414 | mval = 0; | ||
2415 | |||
2416 | } /* End CBAUD detected */ | ||
2417 | else | ||
2418 | { /* Begin CBAUD not detected */ | ||
2419 | |||
2420 | /* ------------------------------------------------------------------- | ||
2421 | c_cflags have changed but that change had nothing to do with BAUD. | ||
2422 | Propagate the change to the card. | ||
2423 | ---------------------------------------------------------------------- */ | ||
2424 | |||
2425 | cflag = termios2digi_c(ch, ts->c_cflag); | ||
2426 | |||
2427 | if (cflag != ch->fepcflag) | ||
2428 | { | ||
2429 | ch->fepcflag = cflag; | ||
2430 | /* Set baud rate, char size, stop bits, parity */ | ||
2431 | fepcmd(ch, SETCTRLFLAGS, (unsigned) cflag, 0, 0, 0); | ||
2432 | } | ||
2433 | |||
2434 | |||
2435 | /* ---------------------------------------------------------------- | ||
2436 | If the user has not forced CLOCAL and if the device is not a | ||
2437 | CALLOUT device (Which is always CLOCAL) we set flags such that | ||
2438 | the driver will wait on carrier detect. | ||
2439 | ------------------------------------------------------------------- */ | ||
2440 | |||
2441 | if (ts->c_cflag & CLOCAL) | ||
2442 | { /* Begin it is a cud device or a ttyD device with CLOCAL on */ | ||
2443 | ch->asyncflags &= ~ASYNC_CHECK_CD; | ||
2444 | } /* End it is a cud device or a ttyD device with CLOCAL on */ | ||
2445 | else | ||
2446 | { /* Begin it is a ttyD device */ | ||
2447 | ch->asyncflags |= ASYNC_CHECK_CD; | ||
2448 | } /* End it is a ttyD device */ | ||
2449 | |||
2450 | mval = ch->m_dtr | ch->m_rts; | ||
2451 | |||
2452 | } /* End CBAUD not detected */ | ||
2453 | |||
2454 | iflag = termios2digi_i(ch, ts->c_iflag); | ||
2455 | |||
2456 | /* Check input mode flags */ | ||
2457 | |||
2458 | if (iflag != ch->fepiflag) | ||
2459 | { | ||
2460 | ch->fepiflag = iflag; | ||
2461 | |||
2462 | /* --------------------------------------------------------------- | ||
2463 | Command sets channels iflag structure on the board. Such things | ||
2464 | as input soft flow control, handling of parity errors, and | ||
2465 | break handling are all set here. | ||
2466 | ------------------------------------------------------------------- */ | ||
2467 | |||
2468 | /* break handling, parity handling, input stripping, flow control chars */ | ||
2469 | fepcmd(ch, SETIFLAGS, (unsigned int) ch->fepiflag, 0, 0, 0); | ||
2470 | } | ||
2471 | |||
2472 | /* --------------------------------------------------------------- | ||
2473 | Set the board mint value for this channel. This will cause hardware | ||
2474 | events to be generated each time the DCD signal (Described in mint) | ||
2475 | changes. | ||
2476 | ------------------------------------------------------------------- */ | ||
2477 | bc->mint = ch->dcd; | ||
2478 | |||
2479 | if ((ts->c_cflag & CLOCAL) || (ch->digiext.digi_flags & DIGI_FORCEDCD)) | ||
2480 | if (ch->digiext.digi_flags & DIGI_FORCEDCD) | ||
2481 | bc->mint = 0; | ||
2482 | |||
2483 | ch->imodem = bc->mstat; | ||
2484 | |||
2485 | hflow = termios2digi_h(ch, ts->c_cflag); | ||
2486 | |||
2487 | if (hflow != ch->hflow) | ||
2488 | { | ||
2489 | ch->hflow = hflow; | ||
2490 | |||
2491 | /* -------------------------------------------------------------- | ||
2492 | Hard flow control has been selected but the board is not | ||
2493 | using it. Activate hard flow control now. | ||
2494 | ----------------------------------------------------------------- */ | ||
2495 | |||
2496 | fepcmd(ch, SETHFLOW, hflow, 0xff, 0, 1); | ||
2497 | } | ||
2498 | |||
2499 | |||
2500 | mval ^= ch->modemfake & (mval ^ ch->modem); | ||
2501 | |||
2502 | if (ch->omodem ^ mval) | ||
2503 | { | ||
2504 | ch->omodem = mval; | ||
2505 | |||
2506 | /* -------------------------------------------------------------- | ||
2507 | The below command sets the DTR and RTS mstat structure. If | ||
2508 | hard flow control is NOT active these changes will drive the | ||
2509 | output of the actual DTR and RTS lines. If hard flow control | ||
2510 | is active, the changes will be saved in the mstat structure and | ||
2511 | only asserted when hard flow control is turned off. | ||
2512 | ----------------------------------------------------------------- */ | ||
2513 | |||
2514 | /* First reset DTR & RTS; then set them */ | ||
2515 | fepcmd(ch, SETMODEM, 0, ((ch->m_dtr)|(ch->m_rts)), 0, 1); | ||
2516 | fepcmd(ch, SETMODEM, mval, 0, 0, 1); | ||
2517 | |||
2518 | } | ||
2519 | |||
2520 | if (ch->startc != ch->fepstartc || ch->stopc != ch->fepstopc) | ||
2521 | { | ||
2522 | ch->fepstartc = ch->startc; | ||
2523 | ch->fepstopc = ch->stopc; | ||
2524 | |||
2525 | /* ------------------------------------------------------------ | ||
2526 | The XON / XOFF characters have changed; propagate these | ||
2527 | changes to the card. | ||
2528 | --------------------------------------------------------------- */ | ||
2529 | |||
2530 | fepcmd(ch, SONOFFC, ch->fepstartc, ch->fepstopc, 0, 1); | ||
2531 | } | ||
2532 | |||
2533 | if (ch->startca != ch->fepstartca || ch->stopca != ch->fepstopca) | ||
2534 | { | ||
2535 | ch->fepstartca = ch->startca; | ||
2536 | ch->fepstopca = ch->stopca; | ||
2537 | |||
2538 | /* --------------------------------------------------------------- | ||
2539 | Similar to the above, this time the auxilarly XON / XOFF | ||
2540 | characters have changed; propagate these changes to the card. | ||
2541 | ------------------------------------------------------------------ */ | ||
2542 | |||
2543 | fepcmd(ch, SAUXONOFFC, ch->fepstartca, ch->fepstopca, 0, 1); | ||
2544 | } | ||
2545 | |||
2546 | } /* End epcaparam */ | ||
2547 | |||
2548 | /* --------------------- Begin receive_data ----------------------- */ | ||
2549 | |||
2550 | static void receive_data(struct channel *ch) | ||
2551 | { /* Begin receive_data */ | ||
2552 | |||
2553 | unchar *rptr; | ||
2554 | struct termios *ts = NULL; | ||
2555 | struct tty_struct *tty; | ||
2556 | volatile struct board_chan *bc; | ||
2557 | register int dataToRead, wrapgap, bytesAvailable; | ||
2558 | register unsigned int tail, head; | ||
2559 | unsigned int wrapmask; | ||
2560 | int rc; | ||
2561 | |||
2562 | |||
2563 | /* --------------------------------------------------------------- | ||
2564 | This routine is called by doint when a receive data event | ||
2565 | has taken place. | ||
2566 | ------------------------------------------------------------------- */ | ||
2567 | |||
2568 | globalwinon(ch); | ||
2569 | |||
2570 | if (ch->statusflags & RXSTOPPED) | ||
2571 | return; | ||
2572 | |||
2573 | tty = ch->tty; | ||
2574 | if (tty) | ||
2575 | ts = tty->termios; | ||
2576 | |||
2577 | bc = ch->brdchan; | ||
2578 | |||
2579 | if (!bc) | ||
2580 | { | ||
2581 | printk(KERN_ERR "<Error> - bc is NULL in receive_data!\n"); | ||
2582 | return; | ||
2583 | } | ||
2584 | |||
2585 | wrapmask = ch->rxbufsize - 1; | ||
2586 | |||
2587 | /* --------------------------------------------------------------------- | ||
2588 | Get the head and tail pointers to the receiver queue. Wrap the | ||
2589 | head pointer if it has reached the end of the buffer. | ||
2590 | ------------------------------------------------------------------------ */ | ||
2591 | |||
2592 | head = bc->rin; | ||
2593 | head &= wrapmask; | ||
2594 | tail = bc->rout & wrapmask; | ||
2595 | |||
2596 | bytesAvailable = (head - tail) & wrapmask; | ||
2597 | |||
2598 | if (bytesAvailable == 0) | ||
2599 | return; | ||
2600 | |||
2601 | /* ------------------------------------------------------------------ | ||
2602 | If CREAD bit is off or device not open, set TX tail to head | ||
2603 | --------------------------------------------------------------------- */ | ||
2604 | |||
2605 | if (!tty || !ts || !(ts->c_cflag & CREAD)) | ||
2606 | { | ||
2607 | bc->rout = head; | ||
2608 | return; | ||
2609 | } | ||
2610 | |||
2611 | if (tty->flip.count == TTY_FLIPBUF_SIZE) | ||
2612 | return; | ||
2613 | |||
2614 | if (bc->orun) | ||
2615 | { | ||
2616 | bc->orun = 0; | ||
2617 | printk(KERN_WARNING "overrun! DigiBoard device %s\n",tty->name); | ||
2618 | } | ||
2619 | |||
2620 | rxwinon(ch); | ||
2621 | rptr = tty->flip.char_buf_ptr; | ||
2622 | rc = tty->flip.count; | ||
2623 | |||
2624 | while (bytesAvailable > 0) | ||
2625 | { /* Begin while there is data on the card */ | ||
2626 | |||
2627 | wrapgap = (head >= tail) ? head - tail : ch->rxbufsize - tail; | ||
2628 | |||
2629 | /* --------------------------------------------------------------- | ||
2630 | Even if head has wrapped around only report the amount of | ||
2631 | data to be equal to the size - tail. Remember memcpy can't | ||
2632 | automaticly wrap around the receive buffer. | ||
2633 | ----------------------------------------------------------------- */ | ||
2634 | |||
2635 | dataToRead = (wrapgap < bytesAvailable) ? wrapgap : bytesAvailable; | ||
2636 | |||
2637 | /* -------------------------------------------------------------- | ||
2638 | Make sure we don't overflow the buffer | ||
2639 | ----------------------------------------------------------------- */ | ||
2640 | |||
2641 | if ((rc + dataToRead) > TTY_FLIPBUF_SIZE) | ||
2642 | dataToRead = TTY_FLIPBUF_SIZE - rc; | ||
2643 | |||
2644 | if (dataToRead == 0) | ||
2645 | break; | ||
2646 | |||
2647 | /* --------------------------------------------------------------- | ||
2648 | Move data read from our card into the line disciplines buffer | ||
2649 | for translation if necessary. | ||
2650 | ------------------------------------------------------------------ */ | ||
2651 | |||
2652 | if ((memcpy(rptr, ch->rxptr + tail, dataToRead)) != rptr) | ||
2653 | printk(KERN_ERR "<Error> - receive_data : memcpy failed\n"); | ||
2654 | |||
2655 | rc += dataToRead; | ||
2656 | rptr += dataToRead; | ||
2657 | tail = (tail + dataToRead) & wrapmask; | ||
2658 | bytesAvailable -= dataToRead; | ||
2659 | |||
2660 | } /* End while there is data on the card */ | ||
2661 | |||
2662 | |||
2663 | tty->flip.count = rc; | ||
2664 | tty->flip.char_buf_ptr = rptr; | ||
2665 | globalwinon(ch); | ||
2666 | bc->rout = tail; | ||
2667 | |||
2668 | /* Must be called with global data */ | ||
2669 | tty_schedule_flip(ch->tty); | ||
2670 | return; | ||
2671 | |||
2672 | } /* End receive_data */ | ||
2673 | |||
2674 | static int info_ioctl(struct tty_struct *tty, struct file * file, | ||
2675 | unsigned int cmd, unsigned long arg) | ||
2676 | { | ||
2677 | switch (cmd) | ||
2678 | { /* Begin switch cmd */ | ||
2679 | |||
2680 | case DIGI_GETINFO: | ||
2681 | { /* Begin case DIGI_GETINFO */ | ||
2682 | |||
2683 | struct digi_info di ; | ||
2684 | int brd; | ||
2685 | |||
2686 | getUser(brd, (unsigned int __user *)arg); | ||
2687 | |||
2688 | if ((brd < 0) || (brd >= num_cards) || (num_cards == 0)) | ||
2689 | return (-ENODEV); | ||
2690 | |||
2691 | memset(&di, 0, sizeof(di)); | ||
2692 | |||
2693 | di.board = brd ; | ||
2694 | di.status = boards[brd].status; | ||
2695 | di.type = boards[brd].type ; | ||
2696 | di.numports = boards[brd].numports ; | ||
2697 | di.port = boards[brd].port ; | ||
2698 | di.membase = boards[brd].membase ; | ||
2699 | |||
2700 | if (copy_to_user((void __user *)arg, &di, sizeof (di))) | ||
2701 | return -EFAULT; | ||
2702 | break; | ||
2703 | |||
2704 | } /* End case DIGI_GETINFO */ | ||
2705 | |||
2706 | case DIGI_POLLER: | ||
2707 | { /* Begin case DIGI_POLLER */ | ||
2708 | |||
2709 | int brd = arg & 0xff000000 >> 16 ; | ||
2710 | unsigned char state = arg & 0xff ; | ||
2711 | |||
2712 | if ((brd < 0) || (brd >= num_cards)) | ||
2713 | { | ||
2714 | printk(KERN_ERR "<Error> - DIGI POLLER : brd not valid!\n"); | ||
2715 | return (-ENODEV); | ||
2716 | } | ||
2717 | |||
2718 | digi_poller_inhibited = state ; | ||
2719 | break ; | ||
2720 | |||
2721 | } /* End case DIGI_POLLER */ | ||
2722 | |||
2723 | case DIGI_INIT: | ||
2724 | { /* Begin case DIGI_INIT */ | ||
2725 | |||
2726 | /* ------------------------------------------------------------ | ||
2727 | This call is made by the apps to complete the initilization | ||
2728 | of the board(s). This routine is responsible for setting | ||
2729 | the card to its initial state and setting the drivers control | ||
2730 | fields to the sutianle settings for the card in question. | ||
2731 | ---------------------------------------------------------------- */ | ||
2732 | |||
2733 | int crd ; | ||
2734 | for (crd = 0; crd < num_cards; crd++) | ||
2735 | post_fep_init (crd); | ||
2736 | |||
2737 | break ; | ||
2738 | |||
2739 | } /* End case DIGI_INIT */ | ||
2740 | |||
2741 | |||
2742 | default: | ||
2743 | return -ENOIOCTLCMD; | ||
2744 | |||
2745 | } /* End switch cmd */ | ||
2746 | return (0) ; | ||
2747 | } | ||
2748 | /* --------------------- Begin pc_ioctl ----------------------- */ | ||
2749 | |||
2750 | static int pc_tiocmget(struct tty_struct *tty, struct file *file) | ||
2751 | { | ||
2752 | struct channel *ch = (struct channel *) tty->driver_data; | ||
2753 | volatile struct board_chan *bc; | ||
2754 | unsigned int mstat, mflag = 0; | ||
2755 | unsigned long flags; | ||
2756 | |||
2757 | if (ch) | ||
2758 | bc = ch->brdchan; | ||
2759 | else | ||
2760 | { | ||
2761 | printk(KERN_ERR "<Error> - ch is NULL in pc_tiocmget!\n"); | ||
2762 | return(-EINVAL); | ||
2763 | } | ||
2764 | |||
2765 | save_flags(flags); | ||
2766 | cli(); | ||
2767 | globalwinon(ch); | ||
2768 | mstat = bc->mstat; | ||
2769 | memoff(ch); | ||
2770 | restore_flags(flags); | ||
2771 | |||
2772 | if (mstat & ch->m_dtr) | ||
2773 | mflag |= TIOCM_DTR; | ||
2774 | |||
2775 | if (mstat & ch->m_rts) | ||
2776 | mflag |= TIOCM_RTS; | ||
2777 | |||
2778 | if (mstat & ch->m_cts) | ||
2779 | mflag |= TIOCM_CTS; | ||
2780 | |||
2781 | if (mstat & ch->dsr) | ||
2782 | mflag |= TIOCM_DSR; | ||
2783 | |||
2784 | if (mstat & ch->m_ri) | ||
2785 | mflag |= TIOCM_RI; | ||
2786 | |||
2787 | if (mstat & ch->dcd) | ||
2788 | mflag |= TIOCM_CD; | ||
2789 | |||
2790 | return mflag; | ||
2791 | } | ||
2792 | |||
2793 | static int pc_tiocmset(struct tty_struct *tty, struct file *file, | ||
2794 | unsigned int set, unsigned int clear) | ||
2795 | { | ||
2796 | struct channel *ch = (struct channel *) tty->driver_data; | ||
2797 | unsigned long flags; | ||
2798 | |||
2799 | if (!ch) { | ||
2800 | printk(KERN_ERR "<Error> - ch is NULL in pc_tiocmset!\n"); | ||
2801 | return(-EINVAL); | ||
2802 | } | ||
2803 | |||
2804 | save_flags(flags); | ||
2805 | cli(); | ||
2806 | /* | ||
2807 | * I think this modemfake stuff is broken. It doesn't | ||
2808 | * correctly reflect the behaviour desired by the TIOCM* | ||
2809 | * ioctls. Therefore this is probably broken. | ||
2810 | */ | ||
2811 | if (set & TIOCM_RTS) { | ||
2812 | ch->modemfake |= ch->m_rts; | ||
2813 | ch->modem |= ch->m_rts; | ||
2814 | } | ||
2815 | if (set & TIOCM_DTR) { | ||
2816 | ch->modemfake |= ch->m_dtr; | ||
2817 | ch->modem |= ch->m_dtr; | ||
2818 | } | ||
2819 | if (clear & TIOCM_RTS) { | ||
2820 | ch->modemfake |= ch->m_rts; | ||
2821 | ch->modem &= ~ch->m_rts; | ||
2822 | } | ||
2823 | if (clear & TIOCM_DTR) { | ||
2824 | ch->modemfake |= ch->m_dtr; | ||
2825 | ch->modem &= ~ch->m_dtr; | ||
2826 | } | ||
2827 | |||
2828 | globalwinon(ch); | ||
2829 | |||
2830 | /* -------------------------------------------------------------- | ||
2831 | The below routine generally sets up parity, baud, flow control | ||
2832 | issues, etc.... It effect both control flags and input flags. | ||
2833 | ------------------------------------------------------------------ */ | ||
2834 | |||
2835 | epcaparam(tty,ch); | ||
2836 | memoff(ch); | ||
2837 | restore_flags(flags); | ||
2838 | return 0; | ||
2839 | } | ||
2840 | |||
2841 | static int pc_ioctl(struct tty_struct *tty, struct file * file, | ||
2842 | unsigned int cmd, unsigned long arg) | ||
2843 | { /* Begin pc_ioctl */ | ||
2844 | |||
2845 | digiflow_t dflow; | ||
2846 | int retval; | ||
2847 | unsigned long flags; | ||
2848 | unsigned int mflag, mstat; | ||
2849 | unsigned char startc, stopc; | ||
2850 | volatile struct board_chan *bc; | ||
2851 | struct channel *ch = (struct channel *) tty->driver_data; | ||
2852 | void __user *argp = (void __user *)arg; | ||
2853 | |||
2854 | if (ch) | ||
2855 | bc = ch->brdchan; | ||
2856 | else | ||
2857 | { | ||
2858 | printk(KERN_ERR "<Error> - ch is NULL in pc_ioctl!\n"); | ||
2859 | return(-EINVAL); | ||
2860 | } | ||
2861 | |||
2862 | save_flags(flags); | ||
2863 | |||
2864 | /* ------------------------------------------------------------------- | ||
2865 | For POSIX compliance we need to add more ioctls. See tty_ioctl.c | ||
2866 | in /usr/src/linux/drivers/char for a good example. In particular | ||
2867 | think about adding TCSETAF, TCSETAW, TCSETA, TCSETSF, TCSETSW, TCSETS. | ||
2868 | ---------------------------------------------------------------------- */ | ||
2869 | |||
2870 | switch (cmd) | ||
2871 | { /* Begin switch cmd */ | ||
2872 | |||
2873 | case TCGETS: | ||
2874 | if (copy_to_user(argp, | ||
2875 | tty->termios, sizeof(struct termios))) | ||
2876 | return -EFAULT; | ||
2877 | return(0); | ||
2878 | |||
2879 | case TCGETA: | ||
2880 | return get_termio(tty, argp); | ||
2881 | |||
2882 | case TCSBRK: /* SVID version: non-zero arg --> no break */ | ||
2883 | |||
2884 | retval = tty_check_change(tty); | ||
2885 | if (retval) | ||
2886 | return retval; | ||
2887 | |||
2888 | /* Setup an event to indicate when the transmit buffer empties */ | ||
2889 | |||
2890 | setup_empty_event(tty,ch); | ||
2891 | tty_wait_until_sent(tty, 0); | ||
2892 | if (!arg) | ||
2893 | digi_send_break(ch, HZ/4); /* 1/4 second */ | ||
2894 | return 0; | ||
2895 | |||
2896 | case TCSBRKP: /* support for POSIX tcsendbreak() */ | ||
2897 | |||
2898 | retval = tty_check_change(tty); | ||
2899 | if (retval) | ||
2900 | return retval; | ||
2901 | |||
2902 | /* Setup an event to indicate when the transmit buffer empties */ | ||
2903 | |||
2904 | setup_empty_event(tty,ch); | ||
2905 | tty_wait_until_sent(tty, 0); | ||
2906 | digi_send_break(ch, arg ? arg*(HZ/10) : HZ/4); | ||
2907 | return 0; | ||
2908 | |||
2909 | case TIOCGSOFTCAR: | ||
2910 | if (put_user(C_CLOCAL(tty)?1:0, (unsigned long __user *)arg)) | ||
2911 | return -EFAULT; | ||
2912 | return 0; | ||
2913 | |||
2914 | case TIOCSSOFTCAR: | ||
2915 | { | ||
2916 | unsigned int value; | ||
2917 | |||
2918 | if (get_user(value, (unsigned __user *)argp)) | ||
2919 | return -EFAULT; | ||
2920 | tty->termios->c_cflag = | ||
2921 | ((tty->termios->c_cflag & ~CLOCAL) | | ||
2922 | (value ? CLOCAL : 0)); | ||
2923 | return 0; | ||
2924 | } | ||
2925 | |||
2926 | case TIOCMODG: | ||
2927 | mflag = pc_tiocmget(tty, file); | ||
2928 | if (put_user(mflag, (unsigned long __user *)argp)) | ||
2929 | return -EFAULT; | ||
2930 | break; | ||
2931 | |||
2932 | case TIOCMODS: | ||
2933 | if (get_user(mstat, (unsigned __user *)argp)) | ||
2934 | return -EFAULT; | ||
2935 | return pc_tiocmset(tty, file, mstat, ~mstat); | ||
2936 | |||
2937 | case TIOCSDTR: | ||
2938 | ch->omodem |= ch->m_dtr; | ||
2939 | cli(); | ||
2940 | globalwinon(ch); | ||
2941 | fepcmd(ch, SETMODEM, ch->m_dtr, 0, 10, 1); | ||
2942 | memoff(ch); | ||
2943 | restore_flags(flags); | ||
2944 | break; | ||
2945 | |||
2946 | case TIOCCDTR: | ||
2947 | ch->omodem &= ~ch->m_dtr; | ||
2948 | cli(); | ||
2949 | globalwinon(ch); | ||
2950 | fepcmd(ch, SETMODEM, 0, ch->m_dtr, 10, 1); | ||
2951 | memoff(ch); | ||
2952 | restore_flags(flags); | ||
2953 | break; | ||
2954 | |||
2955 | case DIGI_GETA: | ||
2956 | if (copy_to_user(argp, &ch->digiext, sizeof(digi_t))) | ||
2957 | return -EFAULT; | ||
2958 | break; | ||
2959 | |||
2960 | case DIGI_SETAW: | ||
2961 | case DIGI_SETAF: | ||
2962 | if ((cmd) == (DIGI_SETAW)) | ||
2963 | { | ||
2964 | /* Setup an event to indicate when the transmit buffer empties */ | ||
2965 | |||
2966 | setup_empty_event(tty,ch); | ||
2967 | tty_wait_until_sent(tty, 0); | ||
2968 | } | ||
2969 | else | ||
2970 | { | ||
2971 | /* ldisc lock already held in ioctl */ | ||
2972 | if (tty->ldisc.flush_buffer) | ||
2973 | tty->ldisc.flush_buffer(tty); | ||
2974 | } | ||
2975 | |||
2976 | /* Fall Thru */ | ||
2977 | |||
2978 | case DIGI_SETA: | ||
2979 | if (copy_from_user(&ch->digiext, argp, sizeof(digi_t))) | ||
2980 | return -EFAULT; | ||
2981 | |||
2982 | if (ch->digiext.digi_flags & DIGI_ALTPIN) | ||
2983 | { | ||
2984 | ch->dcd = ch->m_dsr; | ||
2985 | ch->dsr = ch->m_dcd; | ||
2986 | } | ||
2987 | else | ||
2988 | { | ||
2989 | ch->dcd = ch->m_dcd; | ||
2990 | ch->dsr = ch->m_dsr; | ||
2991 | } | ||
2992 | |||
2993 | cli(); | ||
2994 | globalwinon(ch); | ||
2995 | |||
2996 | /* ----------------------------------------------------------------- | ||
2997 | The below routine generally sets up parity, baud, flow control | ||
2998 | issues, etc.... It effect both control flags and input flags. | ||
2999 | ------------------------------------------------------------------- */ | ||
3000 | |||
3001 | epcaparam(tty,ch); | ||
3002 | memoff(ch); | ||
3003 | restore_flags(flags); | ||
3004 | break; | ||
3005 | |||
3006 | case DIGI_GETFLOW: | ||
3007 | case DIGI_GETAFLOW: | ||
3008 | cli(); | ||
3009 | globalwinon(ch); | ||
3010 | if ((cmd) == (DIGI_GETFLOW)) | ||
3011 | { | ||
3012 | dflow.startc = bc->startc; | ||
3013 | dflow.stopc = bc->stopc; | ||
3014 | } | ||
3015 | else | ||
3016 | { | ||
3017 | dflow.startc = bc->startca; | ||
3018 | dflow.stopc = bc->stopca; | ||
3019 | } | ||
3020 | memoff(ch); | ||
3021 | restore_flags(flags); | ||
3022 | |||
3023 | if (copy_to_user(argp, &dflow, sizeof(dflow))) | ||
3024 | return -EFAULT; | ||
3025 | break; | ||
3026 | |||
3027 | case DIGI_SETAFLOW: | ||
3028 | case DIGI_SETFLOW: | ||
3029 | if ((cmd) == (DIGI_SETFLOW)) | ||
3030 | { | ||
3031 | startc = ch->startc; | ||
3032 | stopc = ch->stopc; | ||
3033 | } | ||
3034 | else | ||
3035 | { | ||
3036 | startc = ch->startca; | ||
3037 | stopc = ch->stopca; | ||
3038 | } | ||
3039 | |||
3040 | if (copy_from_user(&dflow, argp, sizeof(dflow))) | ||
3041 | return -EFAULT; | ||
3042 | |||
3043 | if (dflow.startc != startc || dflow.stopc != stopc) | ||
3044 | { /* Begin if setflow toggled */ | ||
3045 | cli(); | ||
3046 | globalwinon(ch); | ||
3047 | |||
3048 | if ((cmd) == (DIGI_SETFLOW)) | ||
3049 | { | ||
3050 | ch->fepstartc = ch->startc = dflow.startc; | ||
3051 | ch->fepstopc = ch->stopc = dflow.stopc; | ||
3052 | fepcmd(ch, SONOFFC, ch->fepstartc, ch->fepstopc, 0, 1); | ||
3053 | } | ||
3054 | else | ||
3055 | { | ||
3056 | ch->fepstartca = ch->startca = dflow.startc; | ||
3057 | ch->fepstopca = ch->stopca = dflow.stopc; | ||
3058 | fepcmd(ch, SAUXONOFFC, ch->fepstartca, ch->fepstopca, 0, 1); | ||
3059 | } | ||
3060 | |||
3061 | if (ch->statusflags & TXSTOPPED) | ||
3062 | pc_start(tty); | ||
3063 | |||
3064 | memoff(ch); | ||
3065 | restore_flags(flags); | ||
3066 | |||
3067 | } /* End if setflow toggled */ | ||
3068 | break; | ||
3069 | |||
3070 | default: | ||
3071 | return -ENOIOCTLCMD; | ||
3072 | |||
3073 | } /* End switch cmd */ | ||
3074 | |||
3075 | return 0; | ||
3076 | |||
3077 | } /* End pc_ioctl */ | ||
3078 | |||
3079 | /* --------------------- Begin pc_set_termios ----------------------- */ | ||
3080 | |||
3081 | static void pc_set_termios(struct tty_struct *tty, struct termios *old_termios) | ||
3082 | { /* Begin pc_set_termios */ | ||
3083 | |||
3084 | struct channel *ch; | ||
3085 | unsigned long flags; | ||
3086 | |||
3087 | /* --------------------------------------------------------- | ||
3088 | verifyChannel returns the channel from the tty struct | ||
3089 | if it is valid. This serves as a sanity check. | ||
3090 | ------------------------------------------------------------- */ | ||
3091 | |||
3092 | if ((ch = verifyChannel(tty)) != NULL) | ||
3093 | { /* Begin if channel valid */ | ||
3094 | |||
3095 | save_flags(flags); | ||
3096 | cli(); | ||
3097 | globalwinon(ch); | ||
3098 | epcaparam(tty, ch); | ||
3099 | memoff(ch); | ||
3100 | |||
3101 | if ((old_termios->c_cflag & CRTSCTS) && | ||
3102 | ((tty->termios->c_cflag & CRTSCTS) == 0)) | ||
3103 | tty->hw_stopped = 0; | ||
3104 | |||
3105 | if (!(old_termios->c_cflag & CLOCAL) && | ||
3106 | (tty->termios->c_cflag & CLOCAL)) | ||
3107 | wake_up_interruptible(&ch->open_wait); | ||
3108 | |||
3109 | restore_flags(flags); | ||
3110 | |||
3111 | } /* End if channel valid */ | ||
3112 | |||
3113 | } /* End pc_set_termios */ | ||
3114 | |||
3115 | /* --------------------- Begin do_softint ----------------------- */ | ||
3116 | |||
3117 | static void do_softint(void *private_) | ||
3118 | { /* Begin do_softint */ | ||
3119 | |||
3120 | struct channel *ch = (struct channel *) private_; | ||
3121 | |||
3122 | |||
3123 | /* Called in response to a modem change event */ | ||
3124 | |||
3125 | if (ch && ch->magic == EPCA_MAGIC) | ||
3126 | { /* Begin EPCA_MAGIC */ | ||
3127 | |||
3128 | struct tty_struct *tty = ch->tty; | ||
3129 | |||
3130 | if (tty && tty->driver_data) | ||
3131 | { | ||
3132 | if (test_and_clear_bit(EPCA_EVENT_HANGUP, &ch->event)) | ||
3133 | { /* Begin if clear_bit */ | ||
3134 | |||
3135 | tty_hangup(tty); /* FIXME: module removal race here - AKPM */ | ||
3136 | wake_up_interruptible(&ch->open_wait); | ||
3137 | ch->asyncflags &= ~ASYNC_NORMAL_ACTIVE; | ||
3138 | |||
3139 | } /* End if clear_bit */ | ||
3140 | } | ||
3141 | |||
3142 | } /* End EPCA_MAGIC */ | ||
3143 | } /* End do_softint */ | ||
3144 | |||
3145 | /* ------------------------------------------------------------ | ||
3146 | pc_stop and pc_start provide software flow control to the | ||
3147 | routine and the pc_ioctl routine. | ||
3148 | ---------------------------------------------------------------- */ | ||
3149 | |||
3150 | /* --------------------- Begin pc_stop ----------------------- */ | ||
3151 | |||
3152 | static void pc_stop(struct tty_struct *tty) | ||
3153 | { /* Begin pc_stop */ | ||
3154 | |||
3155 | struct channel *ch; | ||
3156 | unsigned long flags; | ||
3157 | |||
3158 | /* --------------------------------------------------------- | ||
3159 | verifyChannel returns the channel from the tty struct | ||
3160 | if it is valid. This serves as a sanity check. | ||
3161 | ------------------------------------------------------------- */ | ||
3162 | |||
3163 | if ((ch = verifyChannel(tty)) != NULL) | ||
3164 | { /* Begin if valid channel */ | ||
3165 | |||
3166 | save_flags(flags); | ||
3167 | cli(); | ||
3168 | |||
3169 | if ((ch->statusflags & TXSTOPPED) == 0) | ||
3170 | { /* Begin if transmit stop requested */ | ||
3171 | |||
3172 | globalwinon(ch); | ||
3173 | |||
3174 | /* STOP transmitting now !! */ | ||
3175 | |||
3176 | fepcmd(ch, PAUSETX, 0, 0, 0, 0); | ||
3177 | |||
3178 | ch->statusflags |= TXSTOPPED; | ||
3179 | memoff(ch); | ||
3180 | |||
3181 | } /* End if transmit stop requested */ | ||
3182 | |||
3183 | restore_flags(flags); | ||
3184 | |||
3185 | } /* End if valid channel */ | ||
3186 | |||
3187 | } /* End pc_stop */ | ||
3188 | |||
3189 | /* --------------------- Begin pc_start ----------------------- */ | ||
3190 | |||
3191 | static void pc_start(struct tty_struct *tty) | ||
3192 | { /* Begin pc_start */ | ||
3193 | |||
3194 | struct channel *ch; | ||
3195 | |||
3196 | /* --------------------------------------------------------- | ||
3197 | verifyChannel returns the channel from the tty struct | ||
3198 | if it is valid. This serves as a sanity check. | ||
3199 | ------------------------------------------------------------- */ | ||
3200 | |||
3201 | if ((ch = verifyChannel(tty)) != NULL) | ||
3202 | { /* Begin if channel valid */ | ||
3203 | |||
3204 | unsigned long flags; | ||
3205 | |||
3206 | save_flags(flags); | ||
3207 | cli(); | ||
3208 | |||
3209 | /* Just in case output was resumed because of a change in Digi-flow */ | ||
3210 | if (ch->statusflags & TXSTOPPED) | ||
3211 | { /* Begin transmit resume requested */ | ||
3212 | |||
3213 | volatile struct board_chan *bc; | ||
3214 | |||
3215 | globalwinon(ch); | ||
3216 | bc = ch->brdchan; | ||
3217 | if (ch->statusflags & LOWWAIT) | ||
3218 | bc->ilow = 1; | ||
3219 | |||
3220 | /* Okay, you can start transmitting again... */ | ||
3221 | |||
3222 | fepcmd(ch, RESUMETX, 0, 0, 0, 0); | ||
3223 | |||
3224 | ch->statusflags &= ~TXSTOPPED; | ||
3225 | memoff(ch); | ||
3226 | |||
3227 | } /* End transmit resume requested */ | ||
3228 | |||
3229 | restore_flags(flags); | ||
3230 | |||
3231 | } /* End if channel valid */ | ||
3232 | |||
3233 | } /* End pc_start */ | ||
3234 | |||
3235 | /* ------------------------------------------------------------------ | ||
3236 | The below routines pc_throttle and pc_unthrottle are used | ||
3237 | to slow (And resume) the receipt of data into the kernels | ||
3238 | receive buffers. The exact occurrence of this depends on the | ||
3239 | size of the kernels receive buffer and what the 'watermarks' | ||
3240 | are set to for that buffer. See the n_ttys.c file for more | ||
3241 | details. | ||
3242 | ______________________________________________________________________ */ | ||
3243 | /* --------------------- Begin throttle ----------------------- */ | ||
3244 | |||
3245 | static void pc_throttle(struct tty_struct * tty) | ||
3246 | { /* Begin pc_throttle */ | ||
3247 | |||
3248 | struct channel *ch; | ||
3249 | unsigned long flags; | ||
3250 | |||
3251 | /* --------------------------------------------------------- | ||
3252 | verifyChannel returns the channel from the tty struct | ||
3253 | if it is valid. This serves as a sanity check. | ||
3254 | ------------------------------------------------------------- */ | ||
3255 | |||
3256 | if ((ch = verifyChannel(tty)) != NULL) | ||
3257 | { /* Begin if channel valid */ | ||
3258 | |||
3259 | |||
3260 | save_flags(flags); | ||
3261 | cli(); | ||
3262 | |||
3263 | if ((ch->statusflags & RXSTOPPED) == 0) | ||
3264 | { | ||
3265 | globalwinon(ch); | ||
3266 | fepcmd(ch, PAUSERX, 0, 0, 0, 0); | ||
3267 | |||
3268 | ch->statusflags |= RXSTOPPED; | ||
3269 | memoff(ch); | ||
3270 | } | ||
3271 | restore_flags(flags); | ||
3272 | |||
3273 | } /* End if channel valid */ | ||
3274 | |||
3275 | } /* End pc_throttle */ | ||
3276 | |||
3277 | /* --------------------- Begin unthrottle ----------------------- */ | ||
3278 | |||
3279 | static void pc_unthrottle(struct tty_struct *tty) | ||
3280 | { /* Begin pc_unthrottle */ | ||
3281 | |||
3282 | struct channel *ch; | ||
3283 | unsigned long flags; | ||
3284 | volatile struct board_chan *bc; | ||
3285 | |||
3286 | |||
3287 | /* --------------------------------------------------------- | ||
3288 | verifyChannel returns the channel from the tty struct | ||
3289 | if it is valid. This serves as a sanity check. | ||
3290 | ------------------------------------------------------------- */ | ||
3291 | |||
3292 | if ((ch = verifyChannel(tty)) != NULL) | ||
3293 | { /* Begin if channel valid */ | ||
3294 | |||
3295 | |||
3296 | /* Just in case output was resumed because of a change in Digi-flow */ | ||
3297 | save_flags(flags); | ||
3298 | cli(); | ||
3299 | |||
3300 | if (ch->statusflags & RXSTOPPED) | ||
3301 | { | ||
3302 | |||
3303 | globalwinon(ch); | ||
3304 | bc = ch->brdchan; | ||
3305 | fepcmd(ch, RESUMERX, 0, 0, 0, 0); | ||
3306 | |||
3307 | ch->statusflags &= ~RXSTOPPED; | ||
3308 | memoff(ch); | ||
3309 | } | ||
3310 | restore_flags(flags); | ||
3311 | |||
3312 | } /* End if channel valid */ | ||
3313 | |||
3314 | } /* End pc_unthrottle */ | ||
3315 | |||
3316 | /* --------------------- Begin digi_send_break ----------------------- */ | ||
3317 | |||
3318 | void digi_send_break(struct channel *ch, int msec) | ||
3319 | { /* Begin digi_send_break */ | ||
3320 | |||
3321 | unsigned long flags; | ||
3322 | |||
3323 | save_flags(flags); | ||
3324 | cli(); | ||
3325 | globalwinon(ch); | ||
3326 | |||
3327 | /* -------------------------------------------------------------------- | ||
3328 | Maybe I should send an infinite break here, schedule() for | ||
3329 | msec amount of time, and then stop the break. This way, | ||
3330 | the user can't screw up the FEP by causing digi_send_break() | ||
3331 | to be called (i.e. via an ioctl()) more than once in msec amount | ||
3332 | of time. Try this for now... | ||
3333 | ------------------------------------------------------------------------ */ | ||
3334 | |||
3335 | fepcmd(ch, SENDBREAK, msec, 0, 10, 0); | ||
3336 | memoff(ch); | ||
3337 | |||
3338 | restore_flags(flags); | ||
3339 | |||
3340 | } /* End digi_send_break */ | ||
3341 | |||
3342 | /* --------------------- Begin setup_empty_event ----------------------- */ | ||
3343 | |||
3344 | static void setup_empty_event(struct tty_struct *tty, struct channel *ch) | ||
3345 | { /* Begin setup_empty_event */ | ||
3346 | |||
3347 | volatile struct board_chan *bc = ch->brdchan; | ||
3348 | unsigned long int flags; | ||
3349 | |||
3350 | save_flags(flags); | ||
3351 | cli(); | ||
3352 | globalwinon(ch); | ||
3353 | ch->statusflags |= EMPTYWAIT; | ||
3354 | |||
3355 | /* ------------------------------------------------------------------ | ||
3356 | When set the iempty flag request a event to be generated when the | ||
3357 | transmit buffer is empty (If there is no BREAK in progress). | ||
3358 | --------------------------------------------------------------------- */ | ||
3359 | |||
3360 | bc->iempty = 1; | ||
3361 | memoff(ch); | ||
3362 | restore_flags(flags); | ||
3363 | |||
3364 | } /* End setup_empty_event */ | ||
3365 | |||
3366 | /* --------------------- Begin get_termio ----------------------- */ | ||
3367 | |||
3368 | static int get_termio(struct tty_struct * tty, struct termio __user * termio) | ||
3369 | { /* Begin get_termio */ | ||
3370 | return kernel_termios_to_user_termio(termio, tty->termios); | ||
3371 | } /* End get_termio */ | ||
3372 | /* ---------------------- Begin epca_setup -------------------------- */ | ||
3373 | void epca_setup(char *str, int *ints) | ||
3374 | { /* Begin epca_setup */ | ||
3375 | |||
3376 | struct board_info board; | ||
3377 | int index, loop, last; | ||
3378 | char *temp, *t2; | ||
3379 | unsigned len; | ||
3380 | |||
3381 | /* ---------------------------------------------------------------------- | ||
3382 | If this routine looks a little strange it is because it is only called | ||
3383 | if a LILO append command is given to boot the kernel with parameters. | ||
3384 | In this way, we can provide the user a method of changing his board | ||
3385 | configuration without rebuilding the kernel. | ||
3386 | ----------------------------------------------------------------------- */ | ||
3387 | if (!liloconfig) | ||
3388 | liloconfig = 1; | ||
3389 | |||
3390 | memset(&board, 0, sizeof(board)); | ||
3391 | |||
3392 | /* Assume the data is int first, later we can change it */ | ||
3393 | /* I think that array position 0 of ints holds the number of args */ | ||
3394 | for (last = 0, index = 1; index <= ints[0]; index++) | ||
3395 | switch(index) | ||
3396 | { /* Begin parse switch */ | ||
3397 | |||
3398 | case 1: | ||
3399 | board.status = ints[index]; | ||
3400 | |||
3401 | /* --------------------------------------------------------- | ||
3402 | We check for 2 (As opposed to 1; because 2 is a flag | ||
3403 | instructing the driver to ignore epcaconfig.) For this | ||
3404 | reason we check for 2. | ||
3405 | ------------------------------------------------------------ */ | ||
3406 | if (board.status == 2) | ||
3407 | { /* Begin ignore epcaconfig as well as lilo cmd line */ | ||
3408 | nbdevs = 0; | ||
3409 | num_cards = 0; | ||
3410 | return; | ||
3411 | } /* End ignore epcaconfig as well as lilo cmd line */ | ||
3412 | |||
3413 | if (board.status > 2) | ||
3414 | { | ||
3415 | printk(KERN_ERR "<Error> - epca_setup: Invalid board status 0x%x\n", board.status); | ||
3416 | invalid_lilo_config = 1; | ||
3417 | setup_error_code |= INVALID_BOARD_STATUS; | ||
3418 | return; | ||
3419 | } | ||
3420 | last = index; | ||
3421 | break; | ||
3422 | |||
3423 | case 2: | ||
3424 | board.type = ints[index]; | ||
3425 | if (board.type >= PCIXEM) | ||
3426 | { | ||
3427 | printk(KERN_ERR "<Error> - epca_setup: Invalid board type 0x%x\n", board.type); | ||
3428 | invalid_lilo_config = 1; | ||
3429 | setup_error_code |= INVALID_BOARD_TYPE; | ||
3430 | return; | ||
3431 | } | ||
3432 | last = index; | ||
3433 | break; | ||
3434 | |||
3435 | case 3: | ||
3436 | board.altpin = ints[index]; | ||
3437 | if (board.altpin > 1) | ||
3438 | { | ||
3439 | printk(KERN_ERR "<Error> - epca_setup: Invalid board altpin 0x%x\n", board.altpin); | ||
3440 | invalid_lilo_config = 1; | ||
3441 | setup_error_code |= INVALID_ALTPIN; | ||
3442 | return; | ||
3443 | } | ||
3444 | last = index; | ||
3445 | break; | ||
3446 | |||
3447 | case 4: | ||
3448 | board.numports = ints[index]; | ||
3449 | if ((board.numports < 2) || (board.numports > 256)) | ||
3450 | { | ||
3451 | printk(KERN_ERR "<Error> - epca_setup: Invalid board numports 0x%x\n", board.numports); | ||
3452 | invalid_lilo_config = 1; | ||
3453 | setup_error_code |= INVALID_NUM_PORTS; | ||
3454 | return; | ||
3455 | } | ||
3456 | nbdevs += board.numports; | ||
3457 | last = index; | ||
3458 | break; | ||
3459 | |||
3460 | case 5: | ||
3461 | board.port = (unsigned char *)ints[index]; | ||
3462 | if (ints[index] <= 0) | ||
3463 | { | ||
3464 | printk(KERN_ERR "<Error> - epca_setup: Invalid io port 0x%x\n", (unsigned int)board.port); | ||
3465 | invalid_lilo_config = 1; | ||
3466 | setup_error_code |= INVALID_PORT_BASE; | ||
3467 | return; | ||
3468 | } | ||
3469 | last = index; | ||
3470 | break; | ||
3471 | |||
3472 | case 6: | ||
3473 | board.membase = (unsigned char *)ints[index]; | ||
3474 | if (ints[index] <= 0) | ||
3475 | { | ||
3476 | printk(KERN_ERR "<Error> - epca_setup: Invalid memory base 0x%x\n",(unsigned int)board.membase); | ||
3477 | invalid_lilo_config = 1; | ||
3478 | setup_error_code |= INVALID_MEM_BASE; | ||
3479 | return; | ||
3480 | } | ||
3481 | last = index; | ||
3482 | break; | ||
3483 | |||
3484 | default: | ||
3485 | printk(KERN_ERR "<Error> - epca_setup: Too many integer parms\n"); | ||
3486 | return; | ||
3487 | |||
3488 | } /* End parse switch */ | ||
3489 | |||
3490 | while (str && *str) | ||
3491 | { /* Begin while there is a string arg */ | ||
3492 | |||
3493 | /* find the next comma or terminator */ | ||
3494 | temp = str; | ||
3495 | |||
3496 | /* While string is not null, and a comma hasn't been found */ | ||
3497 | while (*temp && (*temp != ',')) | ||
3498 | temp++; | ||
3499 | |||
3500 | if (!*temp) | ||
3501 | temp = NULL; | ||
3502 | else | ||
3503 | *temp++ = 0; | ||
3504 | |||
3505 | /* Set index to the number of args + 1 */ | ||
3506 | index = last + 1; | ||
3507 | |||
3508 | switch(index) | ||
3509 | { | ||
3510 | case 1: | ||
3511 | len = strlen(str); | ||
3512 | if (strncmp("Disable", str, len) == 0) | ||
3513 | board.status = 0; | ||
3514 | else | ||
3515 | if (strncmp("Enable", str, len) == 0) | ||
3516 | board.status = 1; | ||
3517 | else | ||
3518 | { | ||
3519 | printk(KERN_ERR "<Error> - epca_setup: Invalid status %s\n", str); | ||
3520 | invalid_lilo_config = 1; | ||
3521 | setup_error_code |= INVALID_BOARD_STATUS; | ||
3522 | return; | ||
3523 | } | ||
3524 | last = index; | ||
3525 | break; | ||
3526 | |||
3527 | case 2: | ||
3528 | |||
3529 | for(loop = 0; loop < EPCA_NUM_TYPES; loop++) | ||
3530 | if (strcmp(board_desc[loop], str) == 0) | ||
3531 | break; | ||
3532 | |||
3533 | |||
3534 | /* --------------------------------------------------------------- | ||
3535 | If the index incremented above refers to a legitamate board | ||
3536 | type set it here. | ||
3537 | ------------------------------------------------------------------*/ | ||
3538 | |||
3539 | if (index < EPCA_NUM_TYPES) | ||
3540 | board.type = loop; | ||
3541 | else | ||
3542 | { | ||
3543 | printk(KERN_ERR "<Error> - epca_setup: Invalid board type: %s\n", str); | ||
3544 | invalid_lilo_config = 1; | ||
3545 | setup_error_code |= INVALID_BOARD_TYPE; | ||
3546 | return; | ||
3547 | } | ||
3548 | last = index; | ||
3549 | break; | ||
3550 | |||
3551 | case 3: | ||
3552 | len = strlen(str); | ||
3553 | if (strncmp("Disable", str, len) == 0) | ||
3554 | board.altpin = 0; | ||
3555 | else | ||
3556 | if (strncmp("Enable", str, len) == 0) | ||
3557 | board.altpin = 1; | ||
3558 | else | ||
3559 | { | ||
3560 | printk(KERN_ERR "<Error> - epca_setup: Invalid altpin %s\n", str); | ||
3561 | invalid_lilo_config = 1; | ||
3562 | setup_error_code |= INVALID_ALTPIN; | ||
3563 | return; | ||
3564 | } | ||
3565 | last = index; | ||
3566 | break; | ||
3567 | |||
3568 | case 4: | ||
3569 | t2 = str; | ||
3570 | while (isdigit(*t2)) | ||
3571 | t2++; | ||
3572 | |||
3573 | if (*t2) | ||
3574 | { | ||
3575 | printk(KERN_ERR "<Error> - epca_setup: Invalid port count %s\n", str); | ||
3576 | invalid_lilo_config = 1; | ||
3577 | setup_error_code |= INVALID_NUM_PORTS; | ||
3578 | return; | ||
3579 | } | ||
3580 | |||
3581 | /* ------------------------------------------------------------ | ||
3582 | There is not a man page for simple_strtoul but the code can be | ||
3583 | found in vsprintf.c. The first argument is the string to | ||
3584 | translate (To an unsigned long obviously), the second argument | ||
3585 | can be the address of any character variable or a NULL. If a | ||
3586 | variable is given, the end pointer of the string will be stored | ||
3587 | in that variable; if a NULL is given the end pointer will | ||
3588 | not be returned. The last argument is the base to use. If | ||
3589 | a 0 is indicated, the routine will attempt to determine the | ||
3590 | proper base by looking at the values prefix (A '0' for octal, | ||
3591 | a 'x' for hex, etc ... If a value is given it will use that | ||
3592 | value as the base. | ||
3593 | ---------------------------------------------------------------- */ | ||
3594 | board.numports = simple_strtoul(str, NULL, 0); | ||
3595 | nbdevs += board.numports; | ||
3596 | last = index; | ||
3597 | break; | ||
3598 | |||
3599 | case 5: | ||
3600 | t2 = str; | ||
3601 | while (isxdigit(*t2)) | ||
3602 | t2++; | ||
3603 | |||
3604 | if (*t2) | ||
3605 | { | ||
3606 | printk(KERN_ERR "<Error> - epca_setup: Invalid i/o address %s\n", str); | ||
3607 | invalid_lilo_config = 1; | ||
3608 | setup_error_code |= INVALID_PORT_BASE; | ||
3609 | return; | ||
3610 | } | ||
3611 | |||
3612 | board.port = (unsigned char *)simple_strtoul(str, NULL, 16); | ||
3613 | last = index; | ||
3614 | break; | ||
3615 | |||
3616 | case 6: | ||
3617 | t2 = str; | ||
3618 | while (isxdigit(*t2)) | ||
3619 | t2++; | ||
3620 | |||
3621 | if (*t2) | ||
3622 | { | ||
3623 | printk(KERN_ERR "<Error> - epca_setup: Invalid memory base %s\n",str); | ||
3624 | invalid_lilo_config = 1; | ||
3625 | setup_error_code |= INVALID_MEM_BASE; | ||
3626 | return; | ||
3627 | } | ||
3628 | |||
3629 | board.membase = (unsigned char *)simple_strtoul(str, NULL, 16); | ||
3630 | last = index; | ||
3631 | break; | ||
3632 | |||
3633 | default: | ||
3634 | printk(KERN_ERR "PC/Xx: Too many string parms\n"); | ||
3635 | return; | ||
3636 | } | ||
3637 | str = temp; | ||
3638 | |||
3639 | } /* End while there is a string arg */ | ||
3640 | |||
3641 | |||
3642 | if (last < 6) | ||
3643 | { | ||
3644 | printk(KERN_ERR "PC/Xx: Insufficient parms specified\n"); | ||
3645 | return; | ||
3646 | } | ||
3647 | |||
3648 | /* I should REALLY validate the stuff here */ | ||
3649 | |||
3650 | /* Copies our local copy of board into boards */ | ||
3651 | memcpy((void *)&boards[num_cards],(void *)&board, sizeof(board)); | ||
3652 | |||
3653 | |||
3654 | /* Does this get called once per lilo arg are what ? */ | ||
3655 | |||
3656 | printk(KERN_INFO "PC/Xx: Added board %i, %s %i ports at 0x%4.4X base 0x%6.6X\n", | ||
3657 | num_cards, board_desc[board.type], | ||
3658 | board.numports, (int)board.port, (unsigned int) board.membase); | ||
3659 | |||
3660 | num_cards++; | ||
3661 | |||
3662 | } /* End epca_setup */ | ||
3663 | |||
3664 | |||
3665 | |||
3666 | #ifdef ENABLE_PCI | ||
3667 | /* ------------------------ Begin init_PCI --------------------------- */ | ||
3668 | |||
3669 | enum epic_board_types { | ||
3670 | brd_xr = 0, | ||
3671 | brd_xem, | ||
3672 | brd_cx, | ||
3673 | brd_xrj, | ||
3674 | }; | ||
3675 | |||
3676 | |||
3677 | /* indexed directly by epic_board_types enum */ | ||
3678 | static struct { | ||
3679 | unsigned char board_type; | ||
3680 | unsigned bar_idx; /* PCI base address region */ | ||
3681 | } epca_info_tbl[] = { | ||
3682 | { PCIXR, 0, }, | ||
3683 | { PCIXEM, 0, }, | ||
3684 | { PCICX, 0, }, | ||
3685 | { PCIXRJ, 2, }, | ||
3686 | }; | ||
3687 | |||
3688 | |||
3689 | static int __devinit epca_init_one (struct pci_dev *pdev, | ||
3690 | const struct pci_device_id *ent) | ||
3691 | { | ||
3692 | static int board_num = -1; | ||
3693 | int board_idx, info_idx = ent->driver_data; | ||
3694 | unsigned long addr; | ||
3695 | |||
3696 | if (pci_enable_device(pdev)) | ||
3697 | return -EIO; | ||
3698 | |||
3699 | board_num++; | ||
3700 | board_idx = board_num + num_cards; | ||
3701 | if (board_idx >= MAXBOARDS) | ||
3702 | goto err_out; | ||
3703 | |||
3704 | addr = pci_resource_start (pdev, epca_info_tbl[info_idx].bar_idx); | ||
3705 | if (!addr) { | ||
3706 | printk (KERN_ERR PFX "PCI region #%d not available (size 0)\n", | ||
3707 | epca_info_tbl[info_idx].bar_idx); | ||
3708 | goto err_out; | ||
3709 | } | ||
3710 | |||
3711 | boards[board_idx].status = ENABLED; | ||
3712 | boards[board_idx].type = epca_info_tbl[info_idx].board_type; | ||
3713 | boards[board_idx].numports = 0x0; | ||
3714 | boards[board_idx].port = | ||
3715 | (unsigned char *)((char *) addr + PCI_IO_OFFSET); | ||
3716 | boards[board_idx].membase = | ||
3717 | (unsigned char *)((char *) addr); | ||
3718 | |||
3719 | if (!request_mem_region (addr + PCI_IO_OFFSET, 0x200000, "epca")) { | ||
3720 | printk (KERN_ERR PFX "resource 0x%x @ 0x%lx unavailable\n", | ||
3721 | 0x200000, addr + PCI_IO_OFFSET); | ||
3722 | goto err_out; | ||
3723 | } | ||
3724 | |||
3725 | boards[board_idx].re_map_port = ioremap(addr + PCI_IO_OFFSET, 0x200000); | ||
3726 | if (!boards[board_idx].re_map_port) { | ||
3727 | printk (KERN_ERR PFX "cannot map 0x%x @ 0x%lx\n", | ||
3728 | 0x200000, addr + PCI_IO_OFFSET); | ||
3729 | goto err_out_free_pciio; | ||
3730 | } | ||
3731 | |||
3732 | if (!request_mem_region (addr, 0x200000, "epca")) { | ||
3733 | printk (KERN_ERR PFX "resource 0x%x @ 0x%lx unavailable\n", | ||
3734 | 0x200000, addr); | ||
3735 | goto err_out_free_iounmap; | ||
3736 | } | ||
3737 | |||
3738 | boards[board_idx].re_map_membase = ioremap(addr, 0x200000); | ||
3739 | if (!boards[board_idx].re_map_membase) { | ||
3740 | printk (KERN_ERR PFX "cannot map 0x%x @ 0x%lx\n", | ||
3741 | 0x200000, addr + PCI_IO_OFFSET); | ||
3742 | goto err_out_free_memregion; | ||
3743 | } | ||
3744 | |||
3745 | /* -------------------------------------------------------------- | ||
3746 | I don't know what the below does, but the hardware guys say | ||
3747 | its required on everything except PLX (In this case XRJ). | ||
3748 | ---------------------------------------------------------------- */ | ||
3749 | if (info_idx != brd_xrj) { | ||
3750 | pci_write_config_byte(pdev, 0x40, 0); | ||
3751 | pci_write_config_byte(pdev, 0x46, 0); | ||
3752 | } | ||
3753 | |||
3754 | return 0; | ||
3755 | |||
3756 | err_out_free_memregion: | ||
3757 | release_mem_region (addr, 0x200000); | ||
3758 | err_out_free_iounmap: | ||
3759 | iounmap (boards[board_idx].re_map_port); | ||
3760 | err_out_free_pciio: | ||
3761 | release_mem_region (addr + PCI_IO_OFFSET, 0x200000); | ||
3762 | err_out: | ||
3763 | return -ENODEV; | ||
3764 | } | ||
3765 | |||
3766 | |||
3767 | static struct pci_device_id epca_pci_tbl[] = { | ||
3768 | { PCI_VENDOR_DIGI, PCI_DEVICE_XR, PCI_ANY_ID, PCI_ANY_ID, 0, 0, brd_xr }, | ||
3769 | { PCI_VENDOR_DIGI, PCI_DEVICE_XEM, PCI_ANY_ID, PCI_ANY_ID, 0, 0, brd_xem }, | ||
3770 | { PCI_VENDOR_DIGI, PCI_DEVICE_CX, PCI_ANY_ID, PCI_ANY_ID, 0, 0, brd_cx }, | ||
3771 | { PCI_VENDOR_DIGI, PCI_DEVICE_XRJ, PCI_ANY_ID, PCI_ANY_ID, 0, 0, brd_xrj }, | ||
3772 | { 0, } | ||
3773 | }; | ||
3774 | |||
3775 | MODULE_DEVICE_TABLE(pci, epca_pci_tbl); | ||
3776 | |||
3777 | int __init init_PCI (void) | ||
3778 | { /* Begin init_PCI */ | ||
3779 | memset (&epca_driver, 0, sizeof (epca_driver)); | ||
3780 | epca_driver.name = "epca"; | ||
3781 | epca_driver.id_table = epca_pci_tbl; | ||
3782 | epca_driver.probe = epca_init_one; | ||
3783 | |||
3784 | return pci_register_driver(&epca_driver); | ||
3785 | } /* End init_PCI */ | ||
3786 | |||
3787 | #endif /* ENABLE_PCI */ | ||
3788 | |||
3789 | MODULE_LICENSE("GPL"); | ||