Commit | Line | Data |
---|---|---|
1da177e4 LT |
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"); |