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Commit | Line | Data |
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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 | ||
f2cf8e25 AC |
9 | ** This driver is no longer supported by Digi ** |
10 | ||
1da177e4 LT |
11 | Much of this design and code came from epca.c which was |
12 | copyright (C) 1994, 1995 Troy De Jongh, and subsquently | |
13 | modified by David Nugent, Christoph Lameter, Mike McLagan. | |
14 | ||
15 | This program is free software; you can redistribute it and/or modify | |
16 | it under the terms of the GNU General Public License as published by | |
17 | the Free Software Foundation; either version 2 of the License, or | |
18 | (at your option) any later version. | |
19 | ||
20 | This program is distributed in the hope that it will be useful, | |
21 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
22 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
23 | GNU General Public License for more details. | |
24 | ||
25 | You should have received a copy of the GNU General Public License | |
26 | along with this program; if not, write to the Free Software | |
27 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
28 | ||
29 | --------------------------------------------------------------------------- */ | |
30 | /* See README.epca for change history --DAT*/ | |
31 | ||
32 | ||
33 | #include <linux/config.h> | |
34 | #include <linux/module.h> | |
35 | #include <linux/kernel.h> | |
36 | #include <linux/types.h> | |
37 | #include <linux/init.h> | |
38 | #include <linux/serial.h> | |
39 | #include <linux/delay.h> | |
40 | #include <linux/ctype.h> | |
41 | #include <linux/tty.h> | |
42 | #include <linux/tty_flip.h> | |
43 | #include <linux/slab.h> | |
44 | #include <linux/ioport.h> | |
45 | #include <linux/interrupt.h> | |
46 | #include <asm/uaccess.h> | |
47 | #include <asm/io.h> | |
f2cf8e25 | 48 | #include <linux/spinlock.h> |
1da177e4 LT |
49 | #include <linux/pci.h> |
50 | #include "digiPCI.h" | |
f2cf8e25 | 51 | |
1da177e4 LT |
52 | |
53 | #include "digi1.h" | |
54 | #include "digiFep1.h" | |
55 | #include "epca.h" | |
56 | #include "epcaconfig.h" | |
57 | ||
1da177e4 LT |
58 | /* ---------------------- Begin defines ------------------------ */ |
59 | ||
f2cf8e25 | 60 | #define VERSION "1.3.0.1-LK2.6" |
1da177e4 LT |
61 | |
62 | /* This major needs to be submitted to Linux to join the majors list */ | |
63 | ||
64 | #define DIGIINFOMAJOR 35 /* For Digi specific ioctl */ | |
65 | ||
66 | ||
67 | #define MAXCARDS 7 | |
68 | #define epcaassert(x, msg) if (!(x)) epca_error(__LINE__, msg) | |
69 | ||
70 | #define PFX "epca: " | |
71 | ||
72 | /* ----------------- Begin global definitions ------------------- */ | |
73 | ||
1da177e4 LT |
74 | static int nbdevs, num_cards, liloconfig; |
75 | static int digi_poller_inhibited = 1 ; | |
76 | ||
77 | static int setup_error_code; | |
78 | static int invalid_lilo_config; | |
79 | ||
f2cf8e25 AC |
80 | /* The ISA boards do window flipping into the same spaces so its only sane |
81 | with a single lock. It's still pretty efficient */ | |
82 | ||
83 | static spinlock_t epca_lock = SPIN_LOCK_UNLOCKED; | |
84 | ||
1da177e4 LT |
85 | /* ----------------------------------------------------------------------- |
86 | MAXBOARDS is typically 12, but ISA and EISA cards are restricted to | |
87 | 7 below. | |
88 | --------------------------------------------------------------------------*/ | |
89 | static struct board_info boards[MAXBOARDS]; | |
90 | ||
91 | ||
92 | /* ------------- Begin structures used for driver registeration ---------- */ | |
93 | ||
94 | static struct tty_driver *pc_driver; | |
95 | static struct tty_driver *pc_info; | |
96 | ||
97 | /* ------------------ Begin Digi specific structures -------------------- */ | |
98 | ||
99 | /* ------------------------------------------------------------------------ | |
100 | digi_channels represents an array of structures that keep track of | |
101 | each channel of the Digi product. Information such as transmit and | |
102 | receive pointers, termio data, and signal definitions (DTR, CTS, etc ...) | |
103 | are stored here. This structure is NOT used to overlay the cards | |
104 | physical channel structure. | |
105 | -------------------------------------------------------------------------- */ | |
106 | ||
107 | static struct channel digi_channels[MAX_ALLOC]; | |
108 | ||
109 | /* ------------------------------------------------------------------------ | |
110 | card_ptr is an array used to hold the address of the | |
111 | first channel structure of each card. This array will hold | |
112 | the addresses of various channels located in digi_channels. | |
113 | -------------------------------------------------------------------------- */ | |
114 | static struct channel *card_ptr[MAXCARDS]; | |
115 | ||
116 | static struct timer_list epca_timer; | |
117 | ||
118 | /* ---------------------- Begin function prototypes --------------------- */ | |
119 | ||
120 | /* ---------------------------------------------------------------------- | |
121 | Begin generic memory functions. These functions will be alias | |
122 | (point at) more specific functions dependent on the board being | |
123 | configured. | |
124 | ----------------------------------------------------------------------- */ | |
125 | ||
f2cf8e25 AC |
126 | static void memwinon(struct board_info *b, unsigned int win); |
127 | static void memwinoff(struct board_info *b, unsigned int win); | |
128 | static void globalwinon(struct channel *ch); | |
129 | static void rxwinon(struct channel *ch); | |
130 | static void txwinon(struct channel *ch); | |
131 | static void memoff(struct channel *ch); | |
132 | static void assertgwinon(struct channel *ch); | |
133 | static void assertmemoff(struct channel *ch); | |
1da177e4 LT |
134 | |
135 | /* ---- Begin more 'specific' memory functions for cx_like products --- */ | |
136 | ||
f2cf8e25 AC |
137 | static void pcxem_memwinon(struct board_info *b, unsigned int win); |
138 | static void pcxem_memwinoff(struct board_info *b, unsigned int win); | |
139 | static void pcxem_globalwinon(struct channel *ch); | |
140 | static void pcxem_rxwinon(struct channel *ch); | |
141 | static void pcxem_txwinon(struct channel *ch); | |
142 | static void pcxem_memoff(struct channel *ch); | |
1da177e4 LT |
143 | |
144 | /* ------ Begin more 'specific' memory functions for the pcxe ------- */ | |
145 | ||
f2cf8e25 AC |
146 | static void pcxe_memwinon(struct board_info *b, unsigned int win); |
147 | static void pcxe_memwinoff(struct board_info *b, unsigned int win); | |
148 | static void pcxe_globalwinon(struct channel *ch); | |
149 | static void pcxe_rxwinon(struct channel *ch); | |
150 | static void pcxe_txwinon(struct channel *ch); | |
151 | static void pcxe_memoff(struct channel *ch); | |
1da177e4 LT |
152 | |
153 | /* ---- Begin more 'specific' memory functions for the pc64xe and pcxi ---- */ | |
154 | /* Note : pc64xe and pcxi share the same windowing routines */ | |
155 | ||
f2cf8e25 AC |
156 | static void pcxi_memwinon(struct board_info *b, unsigned int win); |
157 | static void pcxi_memwinoff(struct board_info *b, unsigned int win); | |
158 | static void pcxi_globalwinon(struct channel *ch); | |
159 | static void pcxi_rxwinon(struct channel *ch); | |
160 | static void pcxi_txwinon(struct channel *ch); | |
161 | static void pcxi_memoff(struct channel *ch); | |
1da177e4 LT |
162 | |
163 | /* - Begin 'specific' do nothing memory functions needed for some cards - */ | |
164 | ||
f2cf8e25 AC |
165 | static void dummy_memwinon(struct board_info *b, unsigned int win); |
166 | static void dummy_memwinoff(struct board_info *b, unsigned int win); | |
167 | static void dummy_globalwinon(struct channel *ch); | |
168 | static void dummy_rxwinon(struct channel *ch); | |
169 | static void dummy_txwinon(struct channel *ch); | |
170 | static void dummy_memoff(struct channel *ch); | |
171 | static void dummy_assertgwinon(struct channel *ch); | |
172 | static void dummy_assertmemoff(struct channel *ch); | |
1da177e4 LT |
173 | |
174 | /* ------------------- Begin declare functions ----------------------- */ | |
175 | ||
f2cf8e25 AC |
176 | static struct channel *verifyChannel(struct tty_struct *); |
177 | static void pc_sched_event(struct channel *, int); | |
1da177e4 LT |
178 | static void epca_error(int, char *); |
179 | static void pc_close(struct tty_struct *, struct file *); | |
180 | static void shutdown(struct channel *); | |
181 | static void pc_hangup(struct tty_struct *); | |
182 | static void pc_put_char(struct tty_struct *, unsigned char); | |
183 | static int pc_write_room(struct tty_struct *); | |
184 | static int pc_chars_in_buffer(struct tty_struct *); | |
185 | static void pc_flush_buffer(struct tty_struct *); | |
186 | static void pc_flush_chars(struct tty_struct *); | |
187 | static int block_til_ready(struct tty_struct *, struct file *, | |
188 | struct channel *); | |
189 | static int pc_open(struct tty_struct *, struct file *); | |
190 | static void post_fep_init(unsigned int crd); | |
191 | static void epcapoll(unsigned long); | |
192 | static void doevent(int); | |
193 | static void fepcmd(struct channel *, int, int, int, int, int); | |
194 | static unsigned termios2digi_h(struct channel *ch, unsigned); | |
195 | static unsigned termios2digi_i(struct channel *ch, unsigned); | |
196 | static unsigned termios2digi_c(struct channel *ch, unsigned); | |
197 | static void epcaparam(struct tty_struct *, struct channel *); | |
198 | static void receive_data(struct channel *); | |
199 | static int pc_ioctl(struct tty_struct *, struct file *, | |
200 | unsigned int, unsigned long); | |
201 | static int info_ioctl(struct tty_struct *, struct file *, | |
202 | unsigned int, unsigned long); | |
203 | static void pc_set_termios(struct tty_struct *, struct termios *); | |
204 | static void do_softint(void *); | |
205 | static void pc_stop(struct tty_struct *); | |
206 | static void pc_start(struct tty_struct *); | |
207 | static void pc_throttle(struct tty_struct * tty); | |
208 | static void pc_unthrottle(struct tty_struct *tty); | |
209 | static void digi_send_break(struct channel *ch, int msec); | |
210 | static void setup_empty_event(struct tty_struct *tty, struct channel *ch); | |
211 | void epca_setup(char *, int *); | |
1da177e4 LT |
212 | |
213 | static int get_termio(struct tty_struct *, struct termio __user *); | |
214 | static int pc_write(struct tty_struct *, const unsigned char *, int); | |
f2cf8e25 | 215 | static int pc_init(void); |
1da177e4 | 216 | static int init_PCI(void); |
1da177e4 LT |
217 | |
218 | ||
219 | /* ------------------------------------------------------------------ | |
220 | Table of functions for each board to handle memory. Mantaining | |
221 | parallelism is a *very* good idea here. The idea is for the | |
222 | runtime code to blindly call these functions, not knowing/caring | |
223 | about the underlying hardware. This stuff should contain no | |
224 | conditionals; if more functionality is needed a different entry | |
225 | should be established. These calls are the interface calls and | |
226 | are the only functions that should be accessed. Anyone caught | |
227 | making direct calls deserves what they get. | |
228 | -------------------------------------------------------------------- */ | |
229 | ||
f2cf8e25 | 230 | static void memwinon(struct board_info *b, unsigned int win) |
1da177e4 LT |
231 | { |
232 | (b->memwinon)(b, win); | |
233 | } | |
234 | ||
f2cf8e25 | 235 | static void memwinoff(struct board_info *b, unsigned int win) |
1da177e4 LT |
236 | { |
237 | (b->memwinoff)(b, win); | |
238 | } | |
239 | ||
f2cf8e25 | 240 | static void globalwinon(struct channel *ch) |
1da177e4 LT |
241 | { |
242 | (ch->board->globalwinon)(ch); | |
243 | } | |
244 | ||
f2cf8e25 | 245 | static void rxwinon(struct channel *ch) |
1da177e4 LT |
246 | { |
247 | (ch->board->rxwinon)(ch); | |
248 | } | |
249 | ||
f2cf8e25 | 250 | static void txwinon(struct channel *ch) |
1da177e4 LT |
251 | { |
252 | (ch->board->txwinon)(ch); | |
253 | } | |
254 | ||
f2cf8e25 | 255 | static void memoff(struct channel *ch) |
1da177e4 LT |
256 | { |
257 | (ch->board->memoff)(ch); | |
258 | } | |
f2cf8e25 | 259 | static void assertgwinon(struct channel *ch) |
1da177e4 LT |
260 | { |
261 | (ch->board->assertgwinon)(ch); | |
262 | } | |
263 | ||
f2cf8e25 | 264 | static void assertmemoff(struct channel *ch) |
1da177e4 LT |
265 | { |
266 | (ch->board->assertmemoff)(ch); | |
267 | } | |
268 | ||
269 | /* --------------------------------------------------------- | |
270 | PCXEM windowing is the same as that used in the PCXR | |
271 | and CX series cards. | |
272 | ------------------------------------------------------------ */ | |
273 | ||
f2cf8e25 | 274 | static void pcxem_memwinon(struct board_info *b, unsigned int win) |
1da177e4 | 275 | { |
f2cf8e25 | 276 | outb_p(FEPWIN|win, b->port + 1); |
1da177e4 LT |
277 | } |
278 | ||
f2cf8e25 | 279 | static void pcxem_memwinoff(struct board_info *b, unsigned int win) |
1da177e4 | 280 | { |
f2cf8e25 | 281 | outb_p(0, b->port + 1); |
1da177e4 LT |
282 | } |
283 | ||
f2cf8e25 | 284 | static void pcxem_globalwinon(struct channel *ch) |
1da177e4 LT |
285 | { |
286 | outb_p( FEPWIN, (int)ch->board->port + 1); | |
287 | } | |
288 | ||
f2cf8e25 | 289 | static void pcxem_rxwinon(struct channel *ch) |
1da177e4 LT |
290 | { |
291 | outb_p(ch->rxwin, (int)ch->board->port + 1); | |
292 | } | |
293 | ||
f2cf8e25 | 294 | static void pcxem_txwinon(struct channel *ch) |
1da177e4 LT |
295 | { |
296 | outb_p(ch->txwin, (int)ch->board->port + 1); | |
297 | } | |
298 | ||
f2cf8e25 | 299 | static void pcxem_memoff(struct channel *ch) |
1da177e4 LT |
300 | { |
301 | outb_p(0, (int)ch->board->port + 1); | |
302 | } | |
303 | ||
304 | /* ----------------- Begin pcxe memory window stuff ------------------ */ | |
305 | ||
f2cf8e25 | 306 | static void pcxe_memwinon(struct board_info *b, unsigned int win) |
1da177e4 | 307 | { |
f2cf8e25 | 308 | outb_p(FEPWIN | win, b->port + 1); |
1da177e4 LT |
309 | } |
310 | ||
f2cf8e25 | 311 | static void pcxe_memwinoff(struct board_info *b, unsigned int win) |
1da177e4 | 312 | { |
f2cf8e25 AC |
313 | outb_p(inb(b->port) & ~FEPMEM, |
314 | b->port + 1); | |
315 | outb_p(0, b->port + 1); | |
1da177e4 LT |
316 | } |
317 | ||
f2cf8e25 | 318 | static void pcxe_globalwinon(struct channel *ch) |
1da177e4 LT |
319 | { |
320 | outb_p( FEPWIN, (int)ch->board->port + 1); | |
321 | } | |
322 | ||
f2cf8e25 | 323 | static void pcxe_rxwinon(struct channel *ch) |
1da177e4 LT |
324 | { |
325 | outb_p(ch->rxwin, (int)ch->board->port + 1); | |
326 | } | |
327 | ||
f2cf8e25 | 328 | static void pcxe_txwinon(struct channel *ch) |
1da177e4 LT |
329 | { |
330 | outb_p(ch->txwin, (int)ch->board->port + 1); | |
331 | } | |
332 | ||
f2cf8e25 | 333 | static void pcxe_memoff(struct channel *ch) |
1da177e4 LT |
334 | { |
335 | outb_p(0, (int)ch->board->port); | |
336 | outb_p(0, (int)ch->board->port + 1); | |
337 | } | |
338 | ||
339 | /* ------------- Begin pc64xe and pcxi memory window stuff -------------- */ | |
340 | ||
f2cf8e25 | 341 | static void pcxi_memwinon(struct board_info *b, unsigned int win) |
1da177e4 | 342 | { |
f2cf8e25 | 343 | outb_p(inb(b->port) | FEPMEM, b->port); |
1da177e4 LT |
344 | } |
345 | ||
f2cf8e25 | 346 | static void pcxi_memwinoff(struct board_info *b, unsigned int win) |
1da177e4 | 347 | { |
f2cf8e25 | 348 | outb_p(inb(b->port) & ~FEPMEM, b->port); |
1da177e4 LT |
349 | } |
350 | ||
f2cf8e25 | 351 | static void pcxi_globalwinon(struct channel *ch) |
1da177e4 | 352 | { |
f2cf8e25 | 353 | outb_p(FEPMEM, ch->board->port); |
1da177e4 LT |
354 | } |
355 | ||
f2cf8e25 | 356 | static void pcxi_rxwinon(struct channel *ch) |
1da177e4 | 357 | { |
f2cf8e25 | 358 | outb_p(FEPMEM, ch->board->port); |
1da177e4 LT |
359 | } |
360 | ||
f2cf8e25 | 361 | static void pcxi_txwinon(struct channel *ch) |
1da177e4 | 362 | { |
f2cf8e25 | 363 | outb_p(FEPMEM, ch->board->port); |
1da177e4 LT |
364 | } |
365 | ||
f2cf8e25 | 366 | static void pcxi_memoff(struct channel *ch) |
1da177e4 | 367 | { |
f2cf8e25 | 368 | outb_p(0, ch->board->port); |
1da177e4 LT |
369 | } |
370 | ||
f2cf8e25 | 371 | static void pcxi_assertgwinon(struct channel *ch) |
1da177e4 | 372 | { |
f2cf8e25 | 373 | epcaassert(inb(ch->board->port) & FEPMEM, "Global memory off"); |
1da177e4 LT |
374 | } |
375 | ||
f2cf8e25 | 376 | static void pcxi_assertmemoff(struct channel *ch) |
1da177e4 | 377 | { |
f2cf8e25 | 378 | epcaassert(!(inb(ch->board->port) & FEPMEM), "Memory on"); |
1da177e4 LT |
379 | } |
380 | ||
381 | ||
382 | /* ---------------------------------------------------------------------- | |
383 | Not all of the cards need specific memory windowing routines. Some | |
384 | cards (Such as PCI) needs no windowing routines at all. We provide | |
385 | these do nothing routines so that the same code base can be used. | |
386 | The driver will ALWAYS call a windowing routine if it thinks it needs | |
387 | to; regardless of the card. However, dependent on the card the routine | |
388 | may or may not do anything. | |
389 | ---------------------------------------------------------------------------*/ | |
390 | ||
f2cf8e25 | 391 | static void dummy_memwinon(struct board_info *b, unsigned int win) |
1da177e4 LT |
392 | { |
393 | } | |
394 | ||
f2cf8e25 | 395 | static void dummy_memwinoff(struct board_info *b, unsigned int win) |
1da177e4 LT |
396 | { |
397 | } | |
398 | ||
f2cf8e25 | 399 | static void dummy_globalwinon(struct channel *ch) |
1da177e4 LT |
400 | { |
401 | } | |
402 | ||
f2cf8e25 | 403 | static void dummy_rxwinon(struct channel *ch) |
1da177e4 LT |
404 | { |
405 | } | |
406 | ||
f2cf8e25 | 407 | static void dummy_txwinon(struct channel *ch) |
1da177e4 LT |
408 | { |
409 | } | |
410 | ||
f2cf8e25 | 411 | static void dummy_memoff(struct channel *ch) |
1da177e4 LT |
412 | { |
413 | } | |
414 | ||
f2cf8e25 | 415 | static void dummy_assertgwinon(struct channel *ch) |
1da177e4 LT |
416 | { |
417 | } | |
418 | ||
f2cf8e25 | 419 | static void dummy_assertmemoff(struct channel *ch) |
1da177e4 LT |
420 | { |
421 | } | |
422 | ||
423 | /* ----------------- Begin verifyChannel function ----------------------- */ | |
f2cf8e25 | 424 | static struct channel *verifyChannel(struct tty_struct *tty) |
1da177e4 | 425 | { /* Begin verifyChannel */ |
1da177e4 LT |
426 | /* -------------------------------------------------------------------- |
427 | This routine basically provides a sanity check. It insures that | |
428 | the channel returned is within the proper range of addresses as | |
429 | well as properly initialized. If some bogus info gets passed in | |
430 | through tty->driver_data this should catch it. | |
f2cf8e25 AC |
431 | --------------------------------------------------------------------- */ |
432 | if (tty) { | |
433 | struct channel *ch = (struct channel *)tty->driver_data; | |
434 | if ((ch >= &digi_channels[0]) && (ch < &digi_channels[nbdevs])) { | |
1da177e4 LT |
435 | if (ch->magic == EPCA_MAGIC) |
436 | return ch; | |
437 | } | |
f2cf8e25 | 438 | } |
1da177e4 LT |
439 | return NULL; |
440 | ||
441 | } /* End verifyChannel */ | |
442 | ||
443 | /* ------------------ Begin pc_sched_event ------------------------- */ | |
444 | ||
f2cf8e25 AC |
445 | static void pc_sched_event(struct channel *ch, int event) |
446 | { | |
1da177e4 LT |
447 | /* ---------------------------------------------------------------------- |
448 | We call this to schedule interrupt processing on some event. The | |
449 | kernel sees our request and calls the related routine in OUR driver. | |
450 | -------------------------------------------------------------------------*/ | |
1da177e4 LT |
451 | ch->event |= 1 << event; |
452 | schedule_work(&ch->tqueue); | |
1da177e4 LT |
453 | } /* End pc_sched_event */ |
454 | ||
455 | /* ------------------ Begin epca_error ------------------------- */ | |
456 | ||
457 | static void epca_error(int line, char *msg) | |
f2cf8e25 | 458 | { |
1da177e4 | 459 | printk(KERN_ERR "epca_error (Digi): line = %d %s\n",line,msg); |
f2cf8e25 | 460 | } |
1da177e4 LT |
461 | |
462 | /* ------------------ Begin pc_close ------------------------- */ | |
463 | static void pc_close(struct tty_struct * tty, struct file * filp) | |
f2cf8e25 | 464 | { |
1da177e4 LT |
465 | struct channel *ch; |
466 | unsigned long flags; | |
1da177e4 LT |
467 | /* --------------------------------------------------------- |
468 | verifyChannel returns the channel from the tty struct | |
469 | if it is valid. This serves as a sanity check. | |
470 | ------------------------------------------------------------- */ | |
f2cf8e25 AC |
471 | if ((ch = verifyChannel(tty)) != NULL) { /* Begin if ch != NULL */ |
472 | spin_lock_irqsave(&epca_lock, flags); | |
473 | if (tty_hung_up_p(filp)) { | |
474 | spin_unlock_irqrestore(&epca_lock, flags); | |
1da177e4 LT |
475 | return; |
476 | } | |
1da177e4 | 477 | /* Check to see if the channel is open more than once */ |
f2cf8e25 AC |
478 | if (ch->count-- > 1) { |
479 | /* Begin channel is open more than once */ | |
1da177e4 LT |
480 | /* ------------------------------------------------------------- |
481 | Return without doing anything. Someone might still be using | |
482 | the channel. | |
483 | ---------------------------------------------------------------- */ | |
f2cf8e25 | 484 | spin_unlock_irqrestore(&epca_lock, flags); |
1da177e4 LT |
485 | return; |
486 | } /* End channel is open more than once */ | |
487 | ||
488 | /* Port open only once go ahead with shutdown & reset */ | |
56ee4827 | 489 | BUG_ON(ch->count < 0); |
1da177e4 LT |
490 | |
491 | /* --------------------------------------------------------------- | |
492 | Let the rest of the driver know the channel is being closed. | |
493 | This becomes important if an open is attempted before close | |
494 | is finished. | |
495 | ------------------------------------------------------------------ */ | |
1da177e4 | 496 | ch->asyncflags |= ASYNC_CLOSING; |
1da177e4 LT |
497 | tty->closing = 1; |
498 | ||
f2cf8e25 AC |
499 | spin_unlock_irqrestore(&epca_lock, flags); |
500 | ||
501 | if (ch->asyncflags & ASYNC_INITIALIZED) { | |
1da177e4 LT |
502 | /* Setup an event to indicate when the transmit buffer empties */ |
503 | setup_empty_event(tty, ch); | |
504 | tty_wait_until_sent(tty, 3000); /* 30 seconds timeout */ | |
505 | } | |
1da177e4 LT |
506 | if (tty->driver->flush_buffer) |
507 | tty->driver->flush_buffer(tty); | |
508 | ||
509 | tty_ldisc_flush(tty); | |
510 | shutdown(ch); | |
f2cf8e25 AC |
511 | |
512 | spin_lock_irqsave(&epca_lock, flags); | |
1da177e4 LT |
513 | tty->closing = 0; |
514 | ch->event = 0; | |
515 | ch->tty = NULL; | |
f2cf8e25 | 516 | spin_unlock_irqrestore(&epca_lock, flags); |
1da177e4 | 517 | |
f2cf8e25 | 518 | if (ch->blocked_open) { /* Begin if blocked_open */ |
1da177e4 | 519 | if (ch->close_delay) |
1da177e4 | 520 | msleep_interruptible(jiffies_to_msecs(ch->close_delay)); |
1da177e4 | 521 | wake_up_interruptible(&ch->open_wait); |
1da177e4 | 522 | } /* End if blocked_open */ |
1da177e4 LT |
523 | ch->asyncflags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_INITIALIZED | |
524 | ASYNC_CLOSING); | |
525 | wake_up_interruptible(&ch->close_wait); | |
1da177e4 | 526 | } /* End if ch != NULL */ |
1da177e4 LT |
527 | } /* End pc_close */ |
528 | ||
529 | /* ------------------ Begin shutdown ------------------------- */ | |
530 | ||
531 | static void shutdown(struct channel *ch) | |
532 | { /* Begin shutdown */ | |
533 | ||
534 | unsigned long flags; | |
535 | struct tty_struct *tty; | |
bc9a5154 | 536 | struct board_chan __iomem *bc; |
1da177e4 LT |
537 | |
538 | if (!(ch->asyncflags & ASYNC_INITIALIZED)) | |
539 | return; | |
540 | ||
f2cf8e25 | 541 | spin_lock_irqsave(&epca_lock, flags); |
1da177e4 | 542 | |
f2cf8e25 | 543 | globalwinon(ch); |
1da177e4 LT |
544 | bc = ch->brdchan; |
545 | ||
546 | /* ------------------------------------------------------------------ | |
547 | In order for an event to be generated on the receipt of data the | |
548 | idata flag must be set. Since we are shutting down, this is not | |
549 | necessary clear this flag. | |
550 | --------------------------------------------------------------------- */ | |
551 | ||
552 | if (bc) | |
f2cf8e25 | 553 | writeb(0, &bc->idata); |
1da177e4 LT |
554 | tty = ch->tty; |
555 | ||
556 | /* ---------------------------------------------------------------- | |
557 | If we're a modem control device and HUPCL is on, drop RTS & DTR. | |
558 | ------------------------------------------------------------------ */ | |
559 | ||
f2cf8e25 | 560 | if (tty->termios->c_cflag & HUPCL) { |
1da177e4 LT |
561 | ch->omodem &= ~(ch->m_rts | ch->m_dtr); |
562 | fepcmd(ch, SETMODEM, 0, ch->m_dtr | ch->m_rts, 10, 1); | |
563 | } | |
1da177e4 LT |
564 | memoff(ch); |
565 | ||
566 | /* ------------------------------------------------------------------ | |
567 | The channel has officialy been closed. The next time it is opened | |
568 | it will have to reinitialized. Set a flag to indicate this. | |
569 | ---------------------------------------------------------------------- */ | |
570 | ||
571 | /* Prevent future Digi programmed interrupts from coming active */ | |
572 | ||
573 | ch->asyncflags &= ~ASYNC_INITIALIZED; | |
f2cf8e25 | 574 | spin_unlock_irqrestore(&epca_lock, flags); |
1da177e4 LT |
575 | |
576 | } /* End shutdown */ | |
577 | ||
578 | /* ------------------ Begin pc_hangup ------------------------- */ | |
579 | ||
580 | static void pc_hangup(struct tty_struct *tty) | |
581 | { /* Begin pc_hangup */ | |
1da177e4 LT |
582 | struct channel *ch; |
583 | ||
584 | /* --------------------------------------------------------- | |
585 | verifyChannel returns the channel from the tty struct | |
586 | if it is valid. This serves as a sanity check. | |
587 | ------------------------------------------------------------- */ | |
588 | ||
f2cf8e25 | 589 | if ((ch = verifyChannel(tty)) != NULL) { /* Begin if ch != NULL */ |
1da177e4 LT |
590 | unsigned long flags; |
591 | ||
1da177e4 LT |
592 | if (tty->driver->flush_buffer) |
593 | tty->driver->flush_buffer(tty); | |
594 | tty_ldisc_flush(tty); | |
595 | shutdown(ch); | |
596 | ||
f2cf8e25 | 597 | spin_lock_irqsave(&epca_lock, flags); |
1da177e4 LT |
598 | ch->tty = NULL; |
599 | ch->event = 0; | |
600 | ch->count = 0; | |
1da177e4 | 601 | ch->asyncflags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_INITIALIZED); |
f2cf8e25 | 602 | spin_unlock_irqrestore(&epca_lock, flags); |
1da177e4 | 603 | wake_up_interruptible(&ch->open_wait); |
1da177e4 LT |
604 | } /* End if ch != NULL */ |
605 | ||
606 | } /* End pc_hangup */ | |
607 | ||
608 | /* ------------------ Begin pc_write ------------------------- */ | |
609 | ||
610 | static int pc_write(struct tty_struct * tty, | |
611 | const unsigned char *buf, int bytesAvailable) | |
612 | { /* Begin pc_write */ | |
f2cf8e25 AC |
613 | unsigned int head, tail; |
614 | int dataLen; | |
615 | int size; | |
616 | int amountCopied; | |
1da177e4 LT |
617 | struct channel *ch; |
618 | unsigned long flags; | |
619 | int remain; | |
bc9a5154 | 620 | struct board_chan __iomem *bc; |
1da177e4 LT |
621 | |
622 | /* ---------------------------------------------------------------- | |
623 | pc_write is primarily called directly by the kernel routine | |
624 | tty_write (Though it can also be called by put_char) found in | |
625 | tty_io.c. pc_write is passed a line discipline buffer where | |
626 | the data to be written out is stored. The line discipline | |
627 | implementation itself is done at the kernel level and is not | |
628 | brought into the driver. | |
629 | ------------------------------------------------------------------- */ | |
630 | ||
631 | /* --------------------------------------------------------- | |
632 | verifyChannel returns the channel from the tty struct | |
633 | if it is valid. This serves as a sanity check. | |
634 | ------------------------------------------------------------- */ | |
635 | ||
636 | if ((ch = verifyChannel(tty)) == NULL) | |
637 | return 0; | |
638 | ||
639 | /* Make a pointer to the channel data structure found on the board. */ | |
640 | ||
641 | bc = ch->brdchan; | |
642 | size = ch->txbufsize; | |
1da177e4 | 643 | amountCopied = 0; |
1da177e4 | 644 | |
f2cf8e25 | 645 | spin_lock_irqsave(&epca_lock, flags); |
1da177e4 LT |
646 | globalwinon(ch); |
647 | ||
f2cf8e25 AC |
648 | head = readw(&bc->tin) & (size - 1); |
649 | tail = readw(&bc->tout); | |
1da177e4 | 650 | |
f2cf8e25 AC |
651 | if (tail != readw(&bc->tout)) |
652 | tail = readw(&bc->tout); | |
1da177e4 LT |
653 | tail &= (size - 1); |
654 | ||
655 | /* If head >= tail, head has not wrapped around. */ | |
f2cf8e25 | 656 | if (head >= tail) { /* Begin head has not wrapped */ |
1da177e4 LT |
657 | /* --------------------------------------------------------------- |
658 | remain (much like dataLen above) represents the total amount of | |
659 | space available on the card for data. Here dataLen represents | |
660 | the space existing between the head pointer and the end of | |
661 | buffer. This is important because a memcpy cannot be told to | |
662 | automatically wrap around when it hits the buffer end. | |
663 | ------------------------------------------------------------------ */ | |
1da177e4 LT |
664 | dataLen = size - head; |
665 | remain = size - (head - tail) - 1; | |
f2cf8e25 | 666 | } else { /* Begin head has wrapped around */ |
1da177e4 LT |
667 | |
668 | remain = tail - head - 1; | |
669 | dataLen = remain; | |
670 | ||
671 | } /* End head has wrapped around */ | |
1da177e4 LT |
672 | /* ------------------------------------------------------------------- |
673 | Check the space on the card. If we have more data than | |
674 | space; reduce the amount of data to fit the space. | |
675 | ---------------------------------------------------------------------- */ | |
1da177e4 | 676 | bytesAvailable = min(remain, bytesAvailable); |
1da177e4 LT |
677 | txwinon(ch); |
678 | while (bytesAvailable > 0) | |
679 | { /* Begin while there is data to copy onto card */ | |
680 | ||
681 | /* ----------------------------------------------------------------- | |
682 | If head is not wrapped, the below will make sure the first | |
683 | data copy fills to the end of card buffer. | |
684 | ------------------------------------------------------------------- */ | |
685 | ||
686 | dataLen = min(bytesAvailable, dataLen); | |
bc9a5154 | 687 | memcpy_toio(ch->txptr + head, buf, dataLen); |
1da177e4 LT |
688 | buf += dataLen; |
689 | head += dataLen; | |
690 | amountCopied += dataLen; | |
691 | bytesAvailable -= dataLen; | |
692 | ||
f2cf8e25 | 693 | if (head >= size) { |
1da177e4 LT |
694 | head = 0; |
695 | dataLen = tail; | |
696 | } | |
1da177e4 | 697 | } /* End while there is data to copy onto card */ |
1da177e4 LT |
698 | ch->statusflags |= TXBUSY; |
699 | globalwinon(ch); | |
f2cf8e25 | 700 | writew(head, &bc->tin); |
1da177e4 | 701 | |
f2cf8e25 | 702 | if ((ch->statusflags & LOWWAIT) == 0) { |
1da177e4 | 703 | ch->statusflags |= LOWWAIT; |
f2cf8e25 | 704 | writeb(1, &bc->ilow); |
1da177e4 LT |
705 | } |
706 | memoff(ch); | |
f2cf8e25 | 707 | spin_unlock_irqrestore(&epca_lock, flags); |
1da177e4 LT |
708 | return(amountCopied); |
709 | ||
710 | } /* End pc_write */ | |
711 | ||
712 | /* ------------------ Begin pc_put_char ------------------------- */ | |
713 | ||
714 | static void pc_put_char(struct tty_struct *tty, unsigned char c) | |
715 | { /* Begin pc_put_char */ | |
1da177e4 | 716 | pc_write(tty, &c, 1); |
1da177e4 LT |
717 | } /* End pc_put_char */ |
718 | ||
719 | /* ------------------ Begin pc_write_room ------------------------- */ | |
720 | ||
721 | static int pc_write_room(struct tty_struct *tty) | |
722 | { /* Begin pc_write_room */ | |
723 | ||
724 | int remain; | |
725 | struct channel *ch; | |
726 | unsigned long flags; | |
727 | unsigned int head, tail; | |
bc9a5154 | 728 | struct board_chan __iomem *bc; |
1da177e4 LT |
729 | |
730 | remain = 0; | |
731 | ||
732 | /* --------------------------------------------------------- | |
733 | verifyChannel returns the channel from the tty struct | |
734 | if it is valid. This serves as a sanity check. | |
735 | ------------------------------------------------------------- */ | |
736 | ||
f2cf8e25 AC |
737 | if ((ch = verifyChannel(tty)) != NULL) { |
738 | spin_lock_irqsave(&epca_lock, flags); | |
1da177e4 LT |
739 | globalwinon(ch); |
740 | ||
741 | bc = ch->brdchan; | |
f2cf8e25 AC |
742 | head = readw(&bc->tin) & (ch->txbufsize - 1); |
743 | tail = readw(&bc->tout); | |
1da177e4 | 744 | |
f2cf8e25 AC |
745 | if (tail != readw(&bc->tout)) |
746 | tail = readw(&bc->tout); | |
1da177e4 LT |
747 | /* Wrap tail if necessary */ |
748 | tail &= (ch->txbufsize - 1); | |
749 | ||
750 | if ((remain = tail - head - 1) < 0 ) | |
751 | remain += ch->txbufsize; | |
752 | ||
f2cf8e25 | 753 | if (remain && (ch->statusflags & LOWWAIT) == 0) { |
1da177e4 | 754 | ch->statusflags |= LOWWAIT; |
f2cf8e25 | 755 | writeb(1, &bc->ilow); |
1da177e4 LT |
756 | } |
757 | memoff(ch); | |
f2cf8e25 | 758 | spin_unlock_irqrestore(&epca_lock, flags); |
1da177e4 | 759 | } |
1da177e4 LT |
760 | /* Return how much room is left on card */ |
761 | return remain; | |
762 | ||
763 | } /* End pc_write_room */ | |
764 | ||
765 | /* ------------------ Begin pc_chars_in_buffer ---------------------- */ | |
766 | ||
767 | static int pc_chars_in_buffer(struct tty_struct *tty) | |
768 | { /* Begin pc_chars_in_buffer */ | |
769 | ||
770 | int chars; | |
771 | unsigned int ctail, head, tail; | |
772 | int remain; | |
773 | unsigned long flags; | |
774 | struct channel *ch; | |
bc9a5154 | 775 | struct board_chan __iomem *bc; |
1da177e4 LT |
776 | |
777 | /* --------------------------------------------------------- | |
778 | verifyChannel returns the channel from the tty struct | |
779 | if it is valid. This serves as a sanity check. | |
780 | ------------------------------------------------------------- */ | |
781 | ||
782 | if ((ch = verifyChannel(tty)) == NULL) | |
783 | return(0); | |
784 | ||
f2cf8e25 | 785 | spin_lock_irqsave(&epca_lock, flags); |
1da177e4 LT |
786 | globalwinon(ch); |
787 | ||
788 | bc = ch->brdchan; | |
f2cf8e25 AC |
789 | tail = readw(&bc->tout); |
790 | head = readw(&bc->tin); | |
791 | ctail = readw(&ch->mailbox->cout); | |
1da177e4 | 792 | |
f2cf8e25 | 793 | if (tail == head && readw(&ch->mailbox->cin) == ctail && readb(&bc->tbusy) == 0) |
1da177e4 | 794 | chars = 0; |
f2cf8e25 AC |
795 | else { /* Begin if some space on the card has been used */ |
796 | head = readw(&bc->tin) & (ch->txbufsize - 1); | |
1da177e4 | 797 | tail &= (ch->txbufsize - 1); |
1da177e4 LT |
798 | /* -------------------------------------------------------------- |
799 | The logic here is basically opposite of the above pc_write_room | |
800 | here we are finding the amount of bytes in the buffer filled. | |
801 | Not the amount of bytes empty. | |
802 | ------------------------------------------------------------------- */ | |
1da177e4 LT |
803 | if ((remain = tail - head - 1) < 0 ) |
804 | remain += ch->txbufsize; | |
1da177e4 | 805 | chars = (int)(ch->txbufsize - remain); |
1da177e4 LT |
806 | /* ------------------------------------------------------------- |
807 | Make it possible to wakeup anything waiting for output | |
808 | in tty_ioctl.c, etc. | |
809 | ||
810 | If not already set. Setup an event to indicate when the | |
811 | transmit buffer empties | |
812 | ----------------------------------------------------------------- */ | |
1da177e4 LT |
813 | if (!(ch->statusflags & EMPTYWAIT)) |
814 | setup_empty_event(tty,ch); | |
815 | ||
816 | } /* End if some space on the card has been used */ | |
1da177e4 | 817 | memoff(ch); |
f2cf8e25 | 818 | spin_unlock_irqrestore(&epca_lock, flags); |
1da177e4 LT |
819 | /* Return number of characters residing on card. */ |
820 | return(chars); | |
821 | ||
822 | } /* End pc_chars_in_buffer */ | |
823 | ||
824 | /* ------------------ Begin pc_flush_buffer ---------------------- */ | |
825 | ||
826 | static void pc_flush_buffer(struct tty_struct *tty) | |
827 | { /* Begin pc_flush_buffer */ | |
828 | ||
829 | unsigned int tail; | |
830 | unsigned long flags; | |
831 | struct channel *ch; | |
bc9a5154 | 832 | struct board_chan __iomem *bc; |
1da177e4 LT |
833 | /* --------------------------------------------------------- |
834 | verifyChannel returns the channel from the tty struct | |
835 | if it is valid. This serves as a sanity check. | |
836 | ------------------------------------------------------------- */ | |
1da177e4 LT |
837 | if ((ch = verifyChannel(tty)) == NULL) |
838 | return; | |
839 | ||
f2cf8e25 | 840 | spin_lock_irqsave(&epca_lock, flags); |
1da177e4 | 841 | globalwinon(ch); |
1da177e4 | 842 | bc = ch->brdchan; |
f2cf8e25 | 843 | tail = readw(&bc->tout); |
1da177e4 | 844 | /* Have FEP move tout pointer; effectively flushing transmit buffer */ |
1da177e4 | 845 | fepcmd(ch, STOUT, (unsigned) tail, 0, 0, 0); |
1da177e4 | 846 | memoff(ch); |
f2cf8e25 | 847 | spin_unlock_irqrestore(&epca_lock, flags); |
1da177e4 LT |
848 | wake_up_interruptible(&tty->write_wait); |
849 | tty_wakeup(tty); | |
1da177e4 LT |
850 | } /* End pc_flush_buffer */ |
851 | ||
852 | /* ------------------ Begin pc_flush_chars ---------------------- */ | |
853 | ||
854 | static void pc_flush_chars(struct tty_struct *tty) | |
855 | { /* Begin pc_flush_chars */ | |
1da177e4 | 856 | struct channel * ch; |
1da177e4 LT |
857 | /* --------------------------------------------------------- |
858 | verifyChannel returns the channel from the tty struct | |
859 | if it is valid. This serves as a sanity check. | |
860 | ------------------------------------------------------------- */ | |
f2cf8e25 | 861 | if ((ch = verifyChannel(tty)) != NULL) { |
1da177e4 | 862 | unsigned long flags; |
f2cf8e25 | 863 | spin_lock_irqsave(&epca_lock, flags); |
1da177e4 LT |
864 | /* ---------------------------------------------------------------- |
865 | If not already set and the transmitter is busy setup an event | |
866 | to indicate when the transmit empties. | |
867 | ------------------------------------------------------------------- */ | |
1da177e4 LT |
868 | if ((ch->statusflags & TXBUSY) && !(ch->statusflags & EMPTYWAIT)) |
869 | setup_empty_event(tty,ch); | |
f2cf8e25 | 870 | spin_unlock_irqrestore(&epca_lock, flags); |
1da177e4 | 871 | } |
1da177e4 LT |
872 | } /* End pc_flush_chars */ |
873 | ||
874 | /* ------------------ Begin block_til_ready ---------------------- */ | |
875 | ||
876 | static int block_til_ready(struct tty_struct *tty, | |
877 | struct file *filp, struct channel *ch) | |
878 | { /* Begin block_til_ready */ | |
1da177e4 LT |
879 | DECLARE_WAITQUEUE(wait,current); |
880 | int retval, do_clocal = 0; | |
881 | unsigned long flags; | |
882 | ||
f2cf8e25 | 883 | if (tty_hung_up_p(filp)) { |
1da177e4 LT |
884 | if (ch->asyncflags & ASYNC_HUP_NOTIFY) |
885 | retval = -EAGAIN; | |
886 | else | |
887 | retval = -ERESTARTSYS; | |
888 | return(retval); | |
889 | } | |
890 | ||
891 | /* ----------------------------------------------------------------- | |
892 | If the device is in the middle of being closed, then block | |
893 | until it's done, and then try again. | |
894 | -------------------------------------------------------------------- */ | |
f2cf8e25 | 895 | if (ch->asyncflags & ASYNC_CLOSING) { |
1da177e4 LT |
896 | interruptible_sleep_on(&ch->close_wait); |
897 | ||
898 | if (ch->asyncflags & ASYNC_HUP_NOTIFY) | |
899 | return -EAGAIN; | |
900 | else | |
901 | return -ERESTARTSYS; | |
902 | } | |
903 | ||
f2cf8e25 | 904 | if (filp->f_flags & O_NONBLOCK) { |
1da177e4 LT |
905 | /* ----------------------------------------------------------------- |
906 | If non-blocking mode is set, then make the check up front | |
907 | and then exit. | |
908 | -------------------------------------------------------------------- */ | |
1da177e4 | 909 | ch->asyncflags |= ASYNC_NORMAL_ACTIVE; |
1da177e4 LT |
910 | return 0; |
911 | } | |
1da177e4 LT |
912 | if (tty->termios->c_cflag & CLOCAL) |
913 | do_clocal = 1; | |
f2cf8e25 | 914 | /* Block waiting for the carrier detect and the line to become free */ |
1da177e4 LT |
915 | |
916 | retval = 0; | |
917 | add_wait_queue(&ch->open_wait, &wait); | |
1da177e4 | 918 | |
f2cf8e25 | 919 | spin_lock_irqsave(&epca_lock, flags); |
1da177e4 LT |
920 | /* We dec count so that pc_close will know when to free things */ |
921 | if (!tty_hung_up_p(filp)) | |
922 | ch->count--; | |
1da177e4 | 923 | ch->blocked_open++; |
1da177e4 LT |
924 | while(1) |
925 | { /* Begin forever while */ | |
1da177e4 | 926 | set_current_state(TASK_INTERRUPTIBLE); |
1da177e4 LT |
927 | if (tty_hung_up_p(filp) || |
928 | !(ch->asyncflags & ASYNC_INITIALIZED)) | |
929 | { | |
930 | if (ch->asyncflags & ASYNC_HUP_NOTIFY) | |
931 | retval = -EAGAIN; | |
932 | else | |
933 | retval = -ERESTARTSYS; | |
934 | break; | |
935 | } | |
1da177e4 LT |
936 | if (!(ch->asyncflags & ASYNC_CLOSING) && |
937 | (do_clocal || (ch->imodem & ch->dcd))) | |
938 | break; | |
f2cf8e25 | 939 | if (signal_pending(current)) { |
1da177e4 LT |
940 | retval = -ERESTARTSYS; |
941 | break; | |
942 | } | |
f2cf8e25 | 943 | spin_unlock_irqrestore(&epca_lock, flags); |
1da177e4 LT |
944 | /* --------------------------------------------------------------- |
945 | Allow someone else to be scheduled. We will occasionally go | |
946 | through this loop until one of the above conditions change. | |
947 | The below schedule call will allow other processes to enter and | |
948 | prevent this loop from hogging the cpu. | |
949 | ------------------------------------------------------------------ */ | |
950 | schedule(); | |
f2cf8e25 | 951 | spin_lock_irqsave(&epca_lock, flags); |
1da177e4 LT |
952 | |
953 | } /* End forever while */ | |
954 | ||
955 | current->state = TASK_RUNNING; | |
956 | remove_wait_queue(&ch->open_wait, &wait); | |
1da177e4 LT |
957 | if (!tty_hung_up_p(filp)) |
958 | ch->count++; | |
1da177e4 LT |
959 | ch->blocked_open--; |
960 | ||
f2cf8e25 AC |
961 | spin_unlock_irqrestore(&epca_lock, flags); |
962 | ||
1da177e4 LT |
963 | if (retval) |
964 | return retval; | |
965 | ||
966 | ch->asyncflags |= ASYNC_NORMAL_ACTIVE; | |
1da177e4 | 967 | return 0; |
1da177e4 LT |
968 | } /* End block_til_ready */ |
969 | ||
970 | /* ------------------ Begin pc_open ---------------------- */ | |
971 | ||
972 | static int pc_open(struct tty_struct *tty, struct file * filp) | |
973 | { /* Begin pc_open */ | |
974 | ||
975 | struct channel *ch; | |
976 | unsigned long flags; | |
977 | int line, retval, boardnum; | |
bc9a5154 | 978 | struct board_chan __iomem *bc; |
f2cf8e25 | 979 | unsigned int head; |
1da177e4 LT |
980 | |
981 | line = tty->index; | |
f2cf8e25 AC |
982 | if (line < 0 || line >= nbdevs) |
983 | return -ENODEV; | |
1da177e4 LT |
984 | |
985 | ch = &digi_channels[line]; | |
986 | boardnum = ch->boardnum; | |
987 | ||
988 | /* Check status of board configured in system. */ | |
989 | ||
990 | /* ----------------------------------------------------------------- | |
991 | I check to see if the epca_setup routine detected an user error. | |
992 | It might be better to put this in pc_init, but for the moment it | |
993 | goes here. | |
994 | ---------------------------------------------------------------------- */ | |
995 | ||
f2cf8e25 | 996 | if (invalid_lilo_config) { |
1da177e4 | 997 | if (setup_error_code & INVALID_BOARD_TYPE) |
f2cf8e25 | 998 | printk(KERN_ERR "epca: pc_open: Invalid board type specified in kernel options.\n"); |
1da177e4 | 999 | if (setup_error_code & INVALID_NUM_PORTS) |
f2cf8e25 | 1000 | printk(KERN_ERR "epca: pc_open: Invalid number of ports specified in kernel options.\n"); |
1da177e4 | 1001 | if (setup_error_code & INVALID_MEM_BASE) |
f2cf8e25 | 1002 | printk(KERN_ERR "epca: pc_open: Invalid board memory address specified in kernel options.\n"); |
1da177e4 | 1003 | if (setup_error_code & INVALID_PORT_BASE) |
f2cf8e25 | 1004 | printk(KERN_ERR "epca; pc_open: Invalid board port address specified in kernel options.\n"); |
1da177e4 | 1005 | if (setup_error_code & INVALID_BOARD_STATUS) |
f2cf8e25 | 1006 | printk(KERN_ERR "epca: pc_open: Invalid board status specified in kernel options.\n"); |
1da177e4 | 1007 | if (setup_error_code & INVALID_ALTPIN) |
f2cf8e25 | 1008 | printk(KERN_ERR "epca: pc_open: Invalid board altpin specified in kernel options;\n"); |
1da177e4 | 1009 | tty->driver_data = NULL; /* Mark this device as 'down' */ |
f2cf8e25 | 1010 | return -ENODEV; |
1da177e4 | 1011 | } |
f2cf8e25 | 1012 | if (boardnum >= num_cards || boards[boardnum].status == DISABLED) { |
1da177e4 LT |
1013 | tty->driver_data = NULL; /* Mark this device as 'down' */ |
1014 | return(-ENODEV); | |
1015 | } | |
1016 | ||
f2cf8e25 | 1017 | if ((bc = ch->brdchan) == 0) { |
1da177e4 | 1018 | tty->driver_data = NULL; |
f2cf8e25 | 1019 | return -ENODEV; |
1da177e4 LT |
1020 | } |
1021 | ||
f2cf8e25 | 1022 | spin_lock_irqsave(&epca_lock, flags); |
1da177e4 LT |
1023 | /* ------------------------------------------------------------------ |
1024 | Every time a channel is opened, increment a counter. This is | |
1025 | necessary because we do not wish to flush and shutdown the channel | |
1026 | until the last app holding the channel open, closes it. | |
1027 | --------------------------------------------------------------------- */ | |
1da177e4 | 1028 | ch->count++; |
1da177e4 LT |
1029 | /* ---------------------------------------------------------------- |
1030 | Set a kernel structures pointer to our local channel | |
1031 | structure. This way we can get to it when passed only | |
1032 | a tty struct. | |
1033 | ------------------------------------------------------------------ */ | |
1da177e4 | 1034 | tty->driver_data = ch; |
1da177e4 LT |
1035 | /* ---------------------------------------------------------------- |
1036 | If this is the first time the channel has been opened, initialize | |
1037 | the tty->termios struct otherwise let pc_close handle it. | |
1038 | -------------------------------------------------------------------- */ | |
1da177e4 LT |
1039 | globalwinon(ch); |
1040 | ch->statusflags = 0; | |
1041 | ||
1042 | /* Save boards current modem status */ | |
bc9a5154 | 1043 | ch->imodem = readb(&bc->mstat); |
1da177e4 LT |
1044 | |
1045 | /* ---------------------------------------------------------------- | |
1046 | Set receive head and tail ptrs to each other. This indicates | |
1047 | no data available to read. | |
1048 | ----------------------------------------------------------------- */ | |
f2cf8e25 AC |
1049 | head = readw(&bc->rin); |
1050 | writew(head, &bc->rout); | |
1da177e4 LT |
1051 | |
1052 | /* Set the channels associated tty structure */ | |
1053 | ch->tty = tty; | |
1054 | ||
1055 | /* ----------------------------------------------------------------- | |
1056 | The below routine generally sets up parity, baud, flow control | |
1057 | issues, etc.... It effect both control flags and input flags. | |
1058 | -------------------------------------------------------------------- */ | |
1059 | epcaparam(tty,ch); | |
1da177e4 LT |
1060 | ch->asyncflags |= ASYNC_INITIALIZED; |
1061 | memoff(ch); | |
f2cf8e25 | 1062 | spin_unlock_irqrestore(&epca_lock, flags); |
1da177e4 LT |
1063 | |
1064 | retval = block_til_ready(tty, filp, ch); | |
1065 | if (retval) | |
1da177e4 | 1066 | return retval; |
1da177e4 LT |
1067 | /* ------------------------------------------------------------- |
1068 | Set this again in case a hangup set it to zero while this | |
1069 | open() was waiting for the line... | |
1070 | --------------------------------------------------------------- */ | |
f2cf8e25 | 1071 | spin_lock_irqsave(&epca_lock, flags); |
1da177e4 | 1072 | ch->tty = tty; |
1da177e4 | 1073 | globalwinon(ch); |
1da177e4 | 1074 | /* Enable Digi Data events */ |
f2cf8e25 | 1075 | writeb(1, &bc->idata); |
1da177e4 | 1076 | memoff(ch); |
f2cf8e25 | 1077 | spin_unlock_irqrestore(&epca_lock, flags); |
1da177e4 | 1078 | return 0; |
1da177e4 LT |
1079 | } /* End pc_open */ |
1080 | ||
1da177e4 LT |
1081 | static int __init epca_module_init(void) |
1082 | { /* Begin init_module */ | |
f2cf8e25 | 1083 | return pc_init(); |
1da177e4 LT |
1084 | } |
1085 | ||
1086 | module_init(epca_module_init); | |
1da177e4 | 1087 | |
1da177e4 | 1088 | static struct pci_driver epca_driver; |
1da177e4 LT |
1089 | |
1090 | static void __exit epca_module_exit(void) | |
1091 | { | |
1da177e4 LT |
1092 | int count, crd; |
1093 | struct board_info *bd; | |
1094 | struct channel *ch; | |
1da177e4 LT |
1095 | |
1096 | del_timer_sync(&epca_timer); | |
1097 | ||
1da177e4 LT |
1098 | if ((tty_unregister_driver(pc_driver)) || |
1099 | (tty_unregister_driver(pc_info))) | |
1100 | { | |
f2cf8e25 | 1101 | printk(KERN_WARNING "epca: cleanup_module failed to un-register tty driver\n"); |
1da177e4 LT |
1102 | return; |
1103 | } | |
1104 | put_tty_driver(pc_driver); | |
1105 | put_tty_driver(pc_info); | |
1106 | ||
f2cf8e25 | 1107 | for (crd = 0; crd < num_cards; crd++) { /* Begin for each card */ |
1da177e4 | 1108 | bd = &boards[crd]; |
1da177e4 LT |
1109 | if (!bd) |
1110 | { /* Begin sanity check */ | |
1111 | printk(KERN_ERR "<Error> - Digi : cleanup_module failed\n"); | |
1112 | return; | |
1113 | } /* End sanity check */ | |
f2cf8e25 | 1114 | ch = card_ptr[crd]; |
1da177e4 LT |
1115 | for (count = 0; count < bd->numports; count++, ch++) |
1116 | { /* Begin for each port */ | |
f2cf8e25 | 1117 | if (ch) { |
1da177e4 LT |
1118 | if (ch->tty) |
1119 | tty_hangup(ch->tty); | |
1120 | kfree(ch->tmp_buf); | |
1121 | } | |
1da177e4 LT |
1122 | } /* End for each port */ |
1123 | } /* End for each card */ | |
1da177e4 | 1124 | pci_unregister_driver (&epca_driver); |
1da177e4 | 1125 | } |
f2cf8e25 | 1126 | |
1da177e4 | 1127 | module_exit(epca_module_exit); |
1da177e4 LT |
1128 | |
1129 | static struct tty_operations pc_ops = { | |
1130 | .open = pc_open, | |
1131 | .close = pc_close, | |
1132 | .write = pc_write, | |
1133 | .write_room = pc_write_room, | |
1134 | .flush_buffer = pc_flush_buffer, | |
1135 | .chars_in_buffer = pc_chars_in_buffer, | |
1136 | .flush_chars = pc_flush_chars, | |
1137 | .put_char = pc_put_char, | |
1138 | .ioctl = pc_ioctl, | |
1139 | .set_termios = pc_set_termios, | |
1140 | .stop = pc_stop, | |
1141 | .start = pc_start, | |
1142 | .throttle = pc_throttle, | |
1143 | .unthrottle = pc_unthrottle, | |
1144 | .hangup = pc_hangup, | |
1145 | }; | |
1146 | ||
1147 | static int info_open(struct tty_struct *tty, struct file * filp) | |
1148 | { | |
1149 | return 0; | |
1150 | } | |
1151 | ||
1152 | static struct tty_operations info_ops = { | |
1153 | .open = info_open, | |
1154 | .ioctl = info_ioctl, | |
1155 | }; | |
1156 | ||
1157 | /* ------------------ Begin pc_init ---------------------- */ | |
1158 | ||
f2cf8e25 | 1159 | static int __init pc_init(void) |
1da177e4 | 1160 | { /* Begin pc_init */ |
1da177e4 LT |
1161 | int crd; |
1162 | struct board_info *bd; | |
1163 | unsigned char board_id = 0; | |
1164 | ||
1da177e4 LT |
1165 | int pci_boards_found, pci_count; |
1166 | ||
1167 | pci_count = 0; | |
1da177e4 LT |
1168 | |
1169 | pc_driver = alloc_tty_driver(MAX_ALLOC); | |
1170 | if (!pc_driver) | |
1171 | return -ENOMEM; | |
1172 | ||
1173 | pc_info = alloc_tty_driver(MAX_ALLOC); | |
1174 | if (!pc_info) { | |
1175 | put_tty_driver(pc_driver); | |
1176 | return -ENOMEM; | |
1177 | } | |
1178 | ||
1179 | /* ----------------------------------------------------------------------- | |
1180 | If epca_setup has not been ran by LILO set num_cards to defaults; copy | |
1181 | board structure defined by digiConfig into drivers board structure. | |
1182 | Note : If LILO has ran epca_setup then epca_setup will handle defining | |
1183 | num_cards as well as copying the data into the board structure. | |
1184 | -------------------------------------------------------------------------- */ | |
f2cf8e25 | 1185 | if (!liloconfig) { /* Begin driver has been configured via. epcaconfig */ |
1da177e4 LT |
1186 | |
1187 | nbdevs = NBDEVS; | |
1188 | num_cards = NUMCARDS; | |
1189 | memcpy((void *)&boards, (void *)&static_boards, | |
1190 | (sizeof(struct board_info) * NUMCARDS)); | |
1191 | } /* End driver has been configured via. epcaconfig */ | |
1192 | ||
1193 | /* ----------------------------------------------------------------- | |
1194 | Note : If lilo was used to configure the driver and the | |
1195 | ignore epcaconfig option was choosen (digiepca=2) then | |
1196 | nbdevs and num_cards will equal 0 at this point. This is | |
1197 | okay; PCI cards will still be picked up if detected. | |
1198 | --------------------------------------------------------------------- */ | |
1199 | ||
1200 | /* ----------------------------------------------------------- | |
1201 | Set up interrupt, we will worry about memory allocation in | |
1202 | post_fep_init. | |
1203 | --------------------------------------------------------------- */ | |
1204 | ||
1205 | ||
1206 | printk(KERN_INFO "DIGI epca driver version %s loaded.\n",VERSION); | |
1207 | ||
1da177e4 LT |
1208 | /* ------------------------------------------------------------------ |
1209 | NOTE : This code assumes that the number of ports found in | |
1210 | the boards array is correct. This could be wrong if | |
1211 | the card in question is PCI (And therefore has no ports | |
1212 | entry in the boards structure.) The rest of the | |
1213 | information will be valid for PCI because the beginning | |
1214 | of pc_init scans for PCI and determines i/o and base | |
1215 | memory addresses. I am not sure if it is possible to | |
1216 | read the number of ports supported by the card prior to | |
1217 | it being booted (Since that is the state it is in when | |
1218 | pc_init is run). Because it is not possible to query the | |
1219 | number of supported ports until after the card has booted; | |
1220 | we are required to calculate the card_ptrs as the card is | |
1221 | is initialized (Inside post_fep_init). The negative thing | |
1222 | about this approach is that digiDload's call to GET_INFO | |
1223 | will have a bad port value. (Since this is called prior | |
1224 | to post_fep_init.) | |
1225 | ||
1226 | --------------------------------------------------------------------- */ | |
1227 | ||
1228 | pci_boards_found = 0; | |
1229 | if(num_cards < MAXBOARDS) | |
1230 | pci_boards_found += init_PCI(); | |
1231 | num_cards += pci_boards_found; | |
1232 | ||
1da177e4 LT |
1233 | pc_driver->owner = THIS_MODULE; |
1234 | pc_driver->name = "ttyD"; | |
1235 | pc_driver->devfs_name = "tts/D"; | |
1236 | pc_driver->major = DIGI_MAJOR; | |
1237 | pc_driver->minor_start = 0; | |
1238 | pc_driver->type = TTY_DRIVER_TYPE_SERIAL; | |
1239 | pc_driver->subtype = SERIAL_TYPE_NORMAL; | |
1240 | pc_driver->init_termios = tty_std_termios; | |
1241 | pc_driver->init_termios.c_iflag = 0; | |
1242 | pc_driver->init_termios.c_oflag = 0; | |
1243 | pc_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL; | |
1244 | pc_driver->init_termios.c_lflag = 0; | |
1245 | pc_driver->flags = TTY_DRIVER_REAL_RAW; | |
1246 | tty_set_operations(pc_driver, &pc_ops); | |
1247 | ||
1248 | pc_info->owner = THIS_MODULE; | |
1249 | pc_info->name = "digi_ctl"; | |
1250 | pc_info->major = DIGIINFOMAJOR; | |
1251 | pc_info->minor_start = 0; | |
1252 | pc_info->type = TTY_DRIVER_TYPE_SERIAL; | |
1253 | pc_info->subtype = SERIAL_TYPE_INFO; | |
1254 | pc_info->init_termios = tty_std_termios; | |
1255 | pc_info->init_termios.c_iflag = 0; | |
1256 | pc_info->init_termios.c_oflag = 0; | |
1257 | pc_info->init_termios.c_lflag = 0; | |
1258 | pc_info->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL; | |
1259 | pc_info->flags = TTY_DRIVER_REAL_RAW; | |
1260 | tty_set_operations(pc_info, &info_ops); | |
1261 | ||
1262 | ||
1da177e4 LT |
1263 | for (crd = 0; crd < num_cards; crd++) |
1264 | { /* Begin for each card */ | |
1265 | ||
1266 | /* ------------------------------------------------------------------ | |
1267 | This is where the appropriate memory handlers for the hardware is | |
1268 | set. Everything at runtime blindly jumps through these vectors. | |
1269 | ---------------------------------------------------------------------- */ | |
1270 | ||
1271 | /* defined in epcaconfig.h */ | |
1272 | bd = &boards[crd]; | |
1273 | ||
1274 | switch (bd->type) | |
1275 | { /* Begin switch on bd->type {board type} */ | |
1276 | case PCXEM: | |
1277 | case EISAXEM: | |
1278 | bd->memwinon = pcxem_memwinon ; | |
1279 | bd->memwinoff = pcxem_memwinoff ; | |
1280 | bd->globalwinon = pcxem_globalwinon ; | |
1281 | bd->txwinon = pcxem_txwinon ; | |
1282 | bd->rxwinon = pcxem_rxwinon ; | |
1283 | bd->memoff = pcxem_memoff ; | |
1284 | bd->assertgwinon = dummy_assertgwinon; | |
1285 | bd->assertmemoff = dummy_assertmemoff; | |
1286 | break; | |
1287 | ||
1288 | case PCIXEM: | |
1289 | case PCIXRJ: | |
1290 | case PCIXR: | |
1291 | bd->memwinon = dummy_memwinon; | |
1292 | bd->memwinoff = dummy_memwinoff; | |
1293 | bd->globalwinon = dummy_globalwinon; | |
1294 | bd->txwinon = dummy_txwinon; | |
1295 | bd->rxwinon = dummy_rxwinon; | |
1296 | bd->memoff = dummy_memoff; | |
1297 | bd->assertgwinon = dummy_assertgwinon; | |
1298 | bd->assertmemoff = dummy_assertmemoff; | |
1299 | break; | |
1300 | ||
1301 | case PCXE: | |
1302 | case PCXEVE: | |
1303 | ||
1304 | bd->memwinon = pcxe_memwinon; | |
1305 | bd->memwinoff = pcxe_memwinoff; | |
1306 | bd->globalwinon = pcxe_globalwinon; | |
1307 | bd->txwinon = pcxe_txwinon; | |
1308 | bd->rxwinon = pcxe_rxwinon; | |
1309 | bd->memoff = pcxe_memoff; | |
1310 | bd->assertgwinon = dummy_assertgwinon; | |
1311 | bd->assertmemoff = dummy_assertmemoff; | |
1312 | break; | |
1313 | ||
1314 | case PCXI: | |
1315 | case PC64XE: | |
1316 | ||
1317 | bd->memwinon = pcxi_memwinon; | |
1318 | bd->memwinoff = pcxi_memwinoff; | |
1319 | bd->globalwinon = pcxi_globalwinon; | |
1320 | bd->txwinon = pcxi_txwinon; | |
1321 | bd->rxwinon = pcxi_rxwinon; | |
1322 | bd->memoff = pcxi_memoff; | |
1323 | bd->assertgwinon = pcxi_assertgwinon; | |
1324 | bd->assertmemoff = pcxi_assertmemoff; | |
1325 | break; | |
1326 | ||
1327 | default: | |
1328 | break; | |
1329 | ||
1330 | } /* End switch on bd->type */ | |
1331 | ||
1332 | /* --------------------------------------------------------------- | |
1333 | Some cards need a memory segment to be defined for use in | |
1334 | transmit and receive windowing operations. These boards | |
1335 | are listed in the below switch. In the case of the XI the | |
1336 | amount of memory on the board is variable so the memory_seg | |
1337 | is also variable. This code determines what they segment | |
1338 | should be. | |
1339 | ----------------------------------------------------------------- */ | |
1340 | ||
1341 | switch (bd->type) | |
1342 | { /* Begin switch on bd->type {board type} */ | |
1343 | ||
1344 | case PCXE: | |
1345 | case PCXEVE: | |
1346 | case PC64XE: | |
1347 | bd->memory_seg = 0xf000; | |
1348 | break; | |
1349 | ||
1350 | case PCXI: | |
1351 | board_id = inb((int)bd->port); | |
1352 | if ((board_id & 0x1) == 0x1) | |
1353 | { /* Begin it's an XI card */ | |
1354 | ||
1355 | /* Is it a 64K board */ | |
1356 | if ((board_id & 0x30) == 0) | |
1357 | bd->memory_seg = 0xf000; | |
1358 | ||
1359 | /* Is it a 128K board */ | |
1360 | if ((board_id & 0x30) == 0x10) | |
1361 | bd->memory_seg = 0xe000; | |
1362 | ||
1363 | /* Is is a 256K board */ | |
1364 | if ((board_id & 0x30) == 0x20) | |
1365 | bd->memory_seg = 0xc000; | |
1366 | ||
1367 | /* Is it a 512K board */ | |
1368 | if ((board_id & 0x30) == 0x30) | |
1369 | bd->memory_seg = 0x8000; | |
1370 | ||
f2cf8e25 | 1371 | } else printk(KERN_ERR "epca: Board at 0x%x doesn't appear to be an XI\n",(int)bd->port); |
1da177e4 LT |
1372 | break; |
1373 | ||
1374 | } /* End switch on bd->type */ | |
1375 | ||
1376 | } /* End for each card */ | |
1377 | ||
1378 | if (tty_register_driver(pc_driver)) | |
1379 | panic("Couldn't register Digi PC/ driver"); | |
1380 | ||
1381 | if (tty_register_driver(pc_info)) | |
1382 | panic("Couldn't register Digi PC/ info "); | |
1383 | ||
1384 | /* ------------------------------------------------------------------- | |
1385 | Start up the poller to check for events on all enabled boards | |
1386 | ---------------------------------------------------------------------- */ | |
1387 | ||
1388 | init_timer(&epca_timer); | |
1389 | epca_timer.function = epcapoll; | |
1390 | mod_timer(&epca_timer, jiffies + HZ/25); | |
1da177e4 LT |
1391 | return 0; |
1392 | ||
1393 | } /* End pc_init */ | |
1394 | ||
1395 | /* ------------------ Begin post_fep_init ---------------------- */ | |
1396 | ||
1397 | static void post_fep_init(unsigned int crd) | |
1398 | { /* Begin post_fep_init */ | |
1399 | ||
1400 | int i; | |
bc9a5154 AV |
1401 | void __iomem *memaddr; |
1402 | struct global_data __iomem *gd; | |
1da177e4 | 1403 | struct board_info *bd; |
bc9a5154 | 1404 | struct board_chan __iomem *bc; |
1da177e4 LT |
1405 | struct channel *ch; |
1406 | int shrinkmem = 0, lowwater ; | |
1407 | ||
1408 | /* ------------------------------------------------------------- | |
1409 | This call is made by the user via. the ioctl call DIGI_INIT. | |
1410 | It is responsible for setting up all the card specific stuff. | |
1411 | ---------------------------------------------------------------- */ | |
1412 | bd = &boards[crd]; | |
1413 | ||
1414 | /* ----------------------------------------------------------------- | |
1415 | If this is a PCI board, get the port info. Remember PCI cards | |
1416 | do not have entries into the epcaconfig.h file, so we can't get | |
1417 | the number of ports from it. Unfortunetly, this means that anyone | |
1418 | doing a DIGI_GETINFO before the board has booted will get an invalid | |
1419 | number of ports returned (It should return 0). Calls to DIGI_GETINFO | |
1420 | after DIGI_INIT has been called will return the proper values. | |
1421 | ------------------------------------------------------------------- */ | |
1422 | ||
f2cf8e25 | 1423 | if (bd->type >= PCIXEM) { /* Begin get PCI number of ports */ |
1da177e4 LT |
1424 | /* -------------------------------------------------------------------- |
1425 | Below we use XEMPORTS as a memory offset regardless of which PCI | |
1426 | card it is. This is because all of the supported PCI cards have | |
1427 | the same memory offset for the channel data. This will have to be | |
1428 | changed if we ever develop a PCI/XE card. NOTE : The FEP manual | |
1429 | states that the port offset is 0xC22 as opposed to 0xC02. This is | |
1430 | only true for PC/XE, and PC/XI cards; not for the XEM, or CX series. | |
1431 | On the PCI cards the number of ports is determined by reading a | |
1432 | ID PROM located in the box attached to the card. The card can then | |
1433 | determine the index the id to determine the number of ports available. | |
1434 | (FYI - The id should be located at 0x1ac (And may use up to 4 bytes | |
1435 | if the box in question is a XEM or CX)). | |
1436 | ------------------------------------------------------------------------ */ | |
f2cf8e25 AC |
1437 | /* PCI cards are already remapped at this point ISA are not */ |
1438 | bd->numports = readw(bd->re_map_membase + XEMPORTS); | |
1da177e4 LT |
1439 | epcaassert(bd->numports <= 64,"PCI returned a invalid number of ports"); |
1440 | nbdevs += (bd->numports); | |
f2cf8e25 AC |
1441 | } else { |
1442 | /* Fix up the mappings for ISA/EISA etc */ | |
1443 | /* FIXME: 64K - can we be smarter ? */ | |
1444 | bd->re_map_membase = ioremap(bd->membase, 0x10000); | |
1445 | } | |
1da177e4 LT |
1446 | |
1447 | if (crd != 0) | |
1448 | card_ptr[crd] = card_ptr[crd-1] + boards[crd-1].numports; | |
1449 | else | |
1450 | card_ptr[crd] = &digi_channels[crd]; /* <- For card 0 only */ | |
1451 | ||
1452 | ch = card_ptr[crd]; | |
1da177e4 LT |
1453 | epcaassert(ch <= &digi_channels[nbdevs - 1], "ch out of range"); |
1454 | ||
f2cf8e25 | 1455 | memaddr = bd->re_map_membase; |
1da177e4 LT |
1456 | |
1457 | /* ----------------------------------------------------------------- | |
1458 | The below assignment will set bc to point at the BEGINING of | |
1459 | the cards channel structures. For 1 card there will be between | |
1460 | 8 and 64 of these structures. | |
1461 | -------------------------------------------------------------------- */ | |
1462 | ||
bc9a5154 | 1463 | bc = memaddr + CHANSTRUCT; |
1da177e4 LT |
1464 | |
1465 | /* ------------------------------------------------------------------- | |
1466 | The below assignment will set gd to point at the BEGINING of | |
1467 | global memory address 0xc00. The first data in that global | |
1468 | memory actually starts at address 0xc1a. The command in | |
1469 | pointer begins at 0xd10. | |
1470 | ---------------------------------------------------------------------- */ | |
1471 | ||
bc9a5154 | 1472 | gd = memaddr + GLOBAL; |
1da177e4 LT |
1473 | |
1474 | /* -------------------------------------------------------------------- | |
1475 | XEPORTS (address 0xc22) points at the number of channels the | |
1476 | card supports. (For 64XE, XI, XEM, and XR use 0xc02) | |
1477 | ----------------------------------------------------------------------- */ | |
1478 | ||
f2cf8e25 | 1479 | if ((bd->type == PCXEVE || bd->type == PCXE) && (readw(memaddr + XEPORTS) < 3)) |
1da177e4 LT |
1480 | shrinkmem = 1; |
1481 | if (bd->type < PCIXEM) | |
1482 | if (!request_region((int)bd->port, 4, board_desc[bd->type])) | |
1483 | return; | |
1da177e4 LT |
1484 | memwinon(bd, 0); |
1485 | ||
1486 | /* -------------------------------------------------------------------- | |
1487 | Remember ch is the main drivers channels structure, while bc is | |
1488 | the cards channel structure. | |
1489 | ------------------------------------------------------------------------ */ | |
1490 | ||
1491 | /* For every port on the card do ..... */ | |
1492 | ||
f2cf8e25 AC |
1493 | for (i = 0; i < bd->numports; i++, ch++, bc++) { /* Begin for each port */ |
1494 | unsigned long flags; | |
bc9a5154 | 1495 | u16 tseg, rseg; |
1da177e4 LT |
1496 | |
1497 | ch->brdchan = bc; | |
1498 | ch->mailbox = gd; | |
1499 | INIT_WORK(&ch->tqueue, do_softint, ch); | |
1500 | ch->board = &boards[crd]; | |
1501 | ||
f2cf8e25 AC |
1502 | spin_lock_irqsave(&epca_lock, flags); |
1503 | switch (bd->type) { | |
1da177e4 LT |
1504 | /* ---------------------------------------------------------------- |
1505 | Since some of the boards use different bitmaps for their | |
1506 | control signals we cannot hard code these values and retain | |
1507 | portability. We virtualize this data here. | |
1508 | ------------------------------------------------------------------- */ | |
1509 | case EISAXEM: | |
1510 | case PCXEM: | |
1511 | case PCIXEM: | |
1512 | case PCIXRJ: | |
1513 | case PCIXR: | |
1514 | ch->m_rts = 0x02 ; | |
1515 | ch->m_dcd = 0x80 ; | |
1516 | ch->m_dsr = 0x20 ; | |
1517 | ch->m_cts = 0x10 ; | |
1518 | ch->m_ri = 0x40 ; | |
1519 | ch->m_dtr = 0x01 ; | |
1520 | break; | |
1521 | ||
1522 | case PCXE: | |
1523 | case PCXEVE: | |
1524 | case PCXI: | |
1525 | case PC64XE: | |
1526 | ch->m_rts = 0x02 ; | |
1527 | ch->m_dcd = 0x08 ; | |
1528 | ch->m_dsr = 0x10 ; | |
1529 | ch->m_cts = 0x20 ; | |
1530 | ch->m_ri = 0x40 ; | |
1531 | ch->m_dtr = 0x80 ; | |
1532 | break; | |
1533 | ||
1534 | } /* End switch bd->type */ | |
1535 | ||
f2cf8e25 | 1536 | if (boards[crd].altpin) { |
1da177e4 LT |
1537 | ch->dsr = ch->m_dcd; |
1538 | ch->dcd = ch->m_dsr; | |
1539 | ch->digiext.digi_flags |= DIGI_ALTPIN; | |
1540 | } | |
f2cf8e25 | 1541 | else { |
1da177e4 LT |
1542 | ch->dcd = ch->m_dcd; |
1543 | ch->dsr = ch->m_dsr; | |
1544 | } | |
1545 | ||
1546 | ch->boardnum = crd; | |
1547 | ch->channelnum = i; | |
1548 | ch->magic = EPCA_MAGIC; | |
1549 | ch->tty = NULL; | |
1550 | ||
f2cf8e25 | 1551 | if (shrinkmem) { |
1da177e4 LT |
1552 | fepcmd(ch, SETBUFFER, 32, 0, 0, 0); |
1553 | shrinkmem = 0; | |
1554 | } | |
1555 | ||
bc9a5154 AV |
1556 | tseg = readw(&bc->tseg); |
1557 | rseg = readw(&bc->rseg); | |
1558 | ||
f2cf8e25 | 1559 | switch (bd->type) { |
1da177e4 LT |
1560 | |
1561 | case PCIXEM: | |
1562 | case PCIXRJ: | |
1563 | case PCIXR: | |
1564 | /* Cover all the 2MEG cards */ | |
bc9a5154 AV |
1565 | ch->txptr = memaddr + ((tseg << 4) & 0x1fffff); |
1566 | ch->rxptr = memaddr + ((rseg << 4) & 0x1fffff); | |
1567 | ch->txwin = FEPWIN | (tseg >> 11); | |
1568 | ch->rxwin = FEPWIN | (rseg >> 11); | |
1da177e4 LT |
1569 | break; |
1570 | ||
1571 | case PCXEM: | |
1572 | case EISAXEM: | |
1573 | /* Cover all the 32K windowed cards */ | |
1574 | /* Mask equal to window size - 1 */ | |
bc9a5154 AV |
1575 | ch->txptr = memaddr + ((tseg << 4) & 0x7fff); |
1576 | ch->rxptr = memaddr + ((rseg << 4) & 0x7fff); | |
1577 | ch->txwin = FEPWIN | (tseg >> 11); | |
1578 | ch->rxwin = FEPWIN | (rseg >> 11); | |
1da177e4 LT |
1579 | break; |
1580 | ||
1581 | case PCXEVE: | |
1582 | case PCXE: | |
bc9a5154 AV |
1583 | ch->txptr = memaddr + (((tseg - bd->memory_seg) << 4) & 0x1fff); |
1584 | ch->txwin = FEPWIN | ((tseg - bd->memory_seg) >> 9); | |
1585 | ch->rxptr = memaddr + (((rseg - bd->memory_seg) << 4) & 0x1fff); | |
1586 | ch->rxwin = FEPWIN | ((rseg - bd->memory_seg) >>9 ); | |
1da177e4 LT |
1587 | break; |
1588 | ||
1589 | case PCXI: | |
1590 | case PC64XE: | |
bc9a5154 AV |
1591 | ch->txptr = memaddr + ((tseg - bd->memory_seg) << 4); |
1592 | ch->rxptr = memaddr + ((rseg - bd->memory_seg) << 4); | |
1da177e4 LT |
1593 | ch->txwin = ch->rxwin = 0; |
1594 | break; | |
1595 | ||
1596 | } /* End switch bd->type */ | |
1597 | ||
1598 | ch->txbufhead = 0; | |
bc9a5154 | 1599 | ch->txbufsize = readw(&bc->tmax) + 1; |
1da177e4 LT |
1600 | |
1601 | ch->rxbufhead = 0; | |
bc9a5154 | 1602 | ch->rxbufsize = readw(&bc->rmax) + 1; |
1da177e4 LT |
1603 | |
1604 | lowwater = ch->txbufsize >= 2000 ? 1024 : (ch->txbufsize / 2); | |
1605 | ||
1606 | /* Set transmitter low water mark */ | |
1607 | fepcmd(ch, STXLWATER, lowwater, 0, 10, 0); | |
1608 | ||
1609 | /* Set receiver low water mark */ | |
1610 | ||
1611 | fepcmd(ch, SRXLWATER, (ch->rxbufsize / 4), 0, 10, 0); | |
1612 | ||
1613 | /* Set receiver high water mark */ | |
1614 | ||
1615 | fepcmd(ch, SRXHWATER, (3 * ch->rxbufsize / 4), 0, 10, 0); | |
1616 | ||
f2cf8e25 AC |
1617 | writew(100, &bc->edelay); |
1618 | writeb(1, &bc->idata); | |
1da177e4 | 1619 | |
f2cf8e25 AC |
1620 | ch->startc = readb(&bc->startc); |
1621 | ch->stopc = readb(&bc->stopc); | |
1622 | ch->startca = readb(&bc->startca); | |
1623 | ch->stopca = readb(&bc->stopca); | |
1da177e4 LT |
1624 | |
1625 | ch->fepcflag = 0; | |
1626 | ch->fepiflag = 0; | |
1627 | ch->fepoflag = 0; | |
1628 | ch->fepstartc = 0; | |
1629 | ch->fepstopc = 0; | |
1630 | ch->fepstartca = 0; | |
1631 | ch->fepstopca = 0; | |
1632 | ||
1633 | ch->close_delay = 50; | |
1634 | ch->count = 0; | |
1635 | ch->blocked_open = 0; | |
1636 | init_waitqueue_head(&ch->open_wait); | |
1637 | init_waitqueue_head(&ch->close_wait); | |
f2cf8e25 AC |
1638 | |
1639 | spin_unlock_irqrestore(&epca_lock, flags); | |
1640 | ||
1da177e4 | 1641 | ch->tmp_buf = kmalloc(ch->txbufsize,GFP_KERNEL); |
f2cf8e25 | 1642 | if (!ch->tmp_buf) { |
1da177e4 LT |
1643 | printk(KERN_ERR "POST FEP INIT : kmalloc failed for port 0x%x\n",i); |
1644 | release_region((int)bd->port, 4); | |
1645 | while(i-- > 0) | |
1646 | kfree((ch--)->tmp_buf); | |
1647 | return; | |
f2cf8e25 | 1648 | } else |
1da177e4 LT |
1649 | memset((void *)ch->tmp_buf,0,ch->txbufsize); |
1650 | } /* End for each port */ | |
1651 | ||
1652 | printk(KERN_INFO | |
1653 | "Digi PC/Xx Driver V%s: %s I/O = 0x%lx Mem = 0x%lx Ports = %d\n", | |
1654 | VERSION, board_desc[bd->type], (long)bd->port, (long)bd->membase, bd->numports); | |
1da177e4 LT |
1655 | memwinoff(bd, 0); |
1656 | ||
1657 | } /* End post_fep_init */ | |
1658 | ||
1659 | /* --------------------- Begin epcapoll ------------------------ */ | |
1660 | ||
1661 | static void epcapoll(unsigned long ignored) | |
1662 | { /* Begin epcapoll */ | |
1663 | ||
1664 | unsigned long flags; | |
1665 | int crd; | |
1666 | volatile unsigned int head, tail; | |
1667 | struct channel *ch; | |
1668 | struct board_info *bd; | |
1669 | ||
1670 | /* ------------------------------------------------------------------- | |
1671 | This routine is called upon every timer interrupt. Even though | |
1672 | the Digi series cards are capable of generating interrupts this | |
1673 | method of non-looping polling is more efficient. This routine | |
1674 | checks for card generated events (Such as receive data, are transmit | |
1675 | buffer empty) and acts on those events. | |
1676 | ----------------------------------------------------------------------- */ | |
1677 | ||
1da177e4 LT |
1678 | for (crd = 0; crd < num_cards; crd++) |
1679 | { /* Begin for each card */ | |
1680 | ||
1681 | bd = &boards[crd]; | |
1682 | ch = card_ptr[crd]; | |
1683 | ||
1684 | if ((bd->status == DISABLED) || digi_poller_inhibited) | |
1685 | continue; /* Begin loop next interation */ | |
1686 | ||
1687 | /* ----------------------------------------------------------- | |
1688 | assertmemoff is not needed here; indeed it is an empty subroutine. | |
1689 | It is being kept because future boards may need this as well as | |
1690 | some legacy boards. | |
1691 | ---------------------------------------------------------------- */ | |
1692 | ||
f2cf8e25 AC |
1693 | spin_lock_irqsave(&epca_lock, flags); |
1694 | ||
1da177e4 LT |
1695 | assertmemoff(ch); |
1696 | ||
1697 | globalwinon(ch); | |
1698 | ||
1699 | /* --------------------------------------------------------------- | |
1700 | In this case head and tail actually refer to the event queue not | |
1701 | the transmit or receive queue. | |
1702 | ------------------------------------------------------------------- */ | |
1703 | ||
f2cf8e25 AC |
1704 | head = readw(&ch->mailbox->ein); |
1705 | tail = readw(&ch->mailbox->eout); | |
1da177e4 LT |
1706 | |
1707 | /* If head isn't equal to tail we have an event */ | |
1708 | ||
1709 | if (head != tail) | |
1710 | doevent(crd); | |
1da177e4 LT |
1711 | memoff(ch); |
1712 | ||
f2cf8e25 | 1713 | spin_unlock_irqrestore(&epca_lock, flags); |
1da177e4 | 1714 | |
f2cf8e25 | 1715 | } /* End for each card */ |
1da177e4 | 1716 | mod_timer(&epca_timer, jiffies + (HZ / 25)); |
1da177e4 LT |
1717 | } /* End epcapoll */ |
1718 | ||
1719 | /* --------------------- Begin doevent ------------------------ */ | |
1720 | ||
1721 | static void doevent(int crd) | |
1722 | { /* Begin doevent */ | |
1723 | ||
bc9a5154 | 1724 | void __iomem *eventbuf; |
1da177e4 LT |
1725 | struct channel *ch, *chan0; |
1726 | static struct tty_struct *tty; | |
f2cf8e25 | 1727 | struct board_info *bd; |
bc9a5154 | 1728 | struct board_chan __iomem *bc; |
f2cf8e25 AC |
1729 | unsigned int tail, head; |
1730 | int event, channel; | |
1731 | int mstat, lstat; | |
1da177e4 LT |
1732 | |
1733 | /* ------------------------------------------------------------------- | |
1734 | This subroutine is called by epcapoll when an event is detected | |
1735 | in the event queue. This routine responds to those events. | |
1736 | --------------------------------------------------------------------- */ | |
1da177e4 LT |
1737 | bd = &boards[crd]; |
1738 | ||
1739 | chan0 = card_ptr[crd]; | |
1740 | epcaassert(chan0 <= &digi_channels[nbdevs - 1], "ch out of range"); | |
1da177e4 | 1741 | assertgwinon(chan0); |
f2cf8e25 | 1742 | while ((tail = readw(&chan0->mailbox->eout)) != (head = readw(&chan0->mailbox->ein))) |
1da177e4 | 1743 | { /* Begin while something in event queue */ |
1da177e4 | 1744 | assertgwinon(chan0); |
f2cf8e25 | 1745 | eventbuf = bd->re_map_membase + tail + ISTART; |
1da177e4 | 1746 | /* Get the channel the event occurred on */ |
f2cf8e25 | 1747 | channel = readb(eventbuf); |
1da177e4 | 1748 | /* Get the actual event code that occurred */ |
f2cf8e25 | 1749 | event = readb(eventbuf + 1); |
1da177e4 LT |
1750 | /* ---------------------------------------------------------------- |
1751 | The two assignments below get the current modem status (mstat) | |
1752 | and the previous modem status (lstat). These are useful becuase | |
1753 | an event could signal a change in modem signals itself. | |
1754 | ------------------------------------------------------------------- */ | |
f2cf8e25 AC |
1755 | mstat = readb(eventbuf + 2); |
1756 | lstat = readb(eventbuf + 3); | |
1da177e4 LT |
1757 | |
1758 | ch = chan0 + channel; | |
f2cf8e25 | 1759 | if ((unsigned)channel >= bd->numports || !ch) { |
1da177e4 LT |
1760 | if (channel >= bd->numports) |
1761 | ch = chan0; | |
1762 | bc = ch->brdchan; | |
1763 | goto next; | |
1764 | } | |
1765 | ||
1766 | if ((bc = ch->brdchan) == NULL) | |
1767 | goto next; | |
1768 | ||
f2cf8e25 | 1769 | if (event & DATA_IND) { /* Begin DATA_IND */ |
1da177e4 LT |
1770 | receive_data(ch); |
1771 | assertgwinon(ch); | |
1da177e4 LT |
1772 | } /* End DATA_IND */ |
1773 | /* else *//* Fix for DCD transition missed bug */ | |
f2cf8e25 | 1774 | if (event & MODEMCHG_IND) { /* Begin MODEMCHG_IND */ |
1da177e4 | 1775 | /* A modem signal change has been indicated */ |
1da177e4 | 1776 | ch->imodem = mstat; |
f2cf8e25 | 1777 | if (ch->asyncflags & ASYNC_CHECK_CD) { |
1da177e4 LT |
1778 | if (mstat & ch->dcd) /* We are now receiving dcd */ |
1779 | wake_up_interruptible(&ch->open_wait); | |
1780 | else | |
1781 | pc_sched_event(ch, EPCA_EVENT_HANGUP); /* No dcd; hangup */ | |
1782 | } | |
1da177e4 | 1783 | } /* End MODEMCHG_IND */ |
1da177e4 | 1784 | tty = ch->tty; |
f2cf8e25 AC |
1785 | if (tty) { /* Begin if valid tty */ |
1786 | if (event & BREAK_IND) { /* Begin if BREAK_IND */ | |
1da177e4 | 1787 | /* A break has been indicated */ |
33f0f88f | 1788 | tty_insert_flip_char(tty, 0, TTY_BREAK); |
1da177e4 | 1789 | tty_schedule_flip(tty); |
f2cf8e25 | 1790 | } else if (event & LOWTX_IND) { /* Begin LOWTX_IND */ |
1da177e4 LT |
1791 | if (ch->statusflags & LOWWAIT) |
1792 | { /* Begin if LOWWAIT */ | |
1da177e4 LT |
1793 | ch->statusflags &= ~LOWWAIT; |
1794 | tty_wakeup(tty); | |
1795 | wake_up_interruptible(&tty->write_wait); | |
1da177e4 | 1796 | } /* End if LOWWAIT */ |
f2cf8e25 | 1797 | } else if (event & EMPTYTX_IND) { /* Begin EMPTYTX_IND */ |
1da177e4 | 1798 | /* This event is generated by setup_empty_event */ |
1da177e4 | 1799 | ch->statusflags &= ~TXBUSY; |
f2cf8e25 | 1800 | if (ch->statusflags & EMPTYWAIT) { /* Begin if EMPTYWAIT */ |
1da177e4 LT |
1801 | ch->statusflags &= ~EMPTYWAIT; |
1802 | tty_wakeup(tty); | |
1da177e4 | 1803 | wake_up_interruptible(&tty->write_wait); |
1da177e4 | 1804 | } /* End if EMPTYWAIT */ |
1da177e4 | 1805 | } /* End EMPTYTX_IND */ |
1da177e4 | 1806 | } /* End if valid tty */ |
1da177e4 LT |
1807 | next: |
1808 | globalwinon(ch); | |
f2cf8e25 AC |
1809 | BUG_ON(!bc); |
1810 | writew(1, &bc->idata); | |
1811 | writew((tail + 4) & (IMAX - ISTART - 4), &chan0->mailbox->eout); | |
1da177e4 | 1812 | globalwinon(chan0); |
1da177e4 | 1813 | } /* End while something in event queue */ |
1da177e4 LT |
1814 | } /* End doevent */ |
1815 | ||
1816 | /* --------------------- Begin fepcmd ------------------------ */ | |
1817 | ||
1818 | static void fepcmd(struct channel *ch, int cmd, int word_or_byte, | |
1819 | int byte2, int ncmds, int bytecmd) | |
1820 | { /* Begin fepcmd */ | |
bc9a5154 | 1821 | unchar __iomem *memaddr; |
1da177e4 LT |
1822 | unsigned int head, cmdTail, cmdStart, cmdMax; |
1823 | long count; | |
1824 | int n; | |
1825 | ||
1826 | /* This is the routine in which commands may be passed to the card. */ | |
1827 | ||
1828 | if (ch->board->status == DISABLED) | |
1da177e4 | 1829 | return; |
1da177e4 | 1830 | assertgwinon(ch); |
1da177e4 | 1831 | /* Remember head (As well as max) is just an offset not a base addr */ |
f2cf8e25 | 1832 | head = readw(&ch->mailbox->cin); |
1da177e4 | 1833 | /* cmdStart is a base address */ |
f2cf8e25 | 1834 | cmdStart = readw(&ch->mailbox->cstart); |
1da177e4 LT |
1835 | /* ------------------------------------------------------------------ |
1836 | We do the addition below because we do not want a max pointer | |
1837 | relative to cmdStart. We want a max pointer that points at the | |
1838 | physical end of the command queue. | |
1839 | -------------------------------------------------------------------- */ | |
f2cf8e25 | 1840 | cmdMax = (cmdStart + 4 + readw(&ch->mailbox->cmax)); |
1da177e4 LT |
1841 | memaddr = ch->board->re_map_membase; |
1842 | ||
f2cf8e25 AC |
1843 | if (head >= (cmdMax - cmdStart) || (head & 03)) { |
1844 | printk(KERN_ERR "line %d: Out of range, cmd = %x, head = %x\n", __LINE__, cmd, head); | |
1845 | printk(KERN_ERR "line %d: Out of range, cmdMax = %x, cmdStart = %x\n", __LINE__, cmdMax, cmdStart); | |
1da177e4 LT |
1846 | return; |
1847 | } | |
f2cf8e25 AC |
1848 | if (bytecmd) { |
1849 | writeb(cmd, memaddr + head + cmdStart + 0); | |
1850 | writeb(ch->channelnum, memaddr + head + cmdStart + 1); | |
1da177e4 | 1851 | /* Below word_or_byte is bits to set */ |
f2cf8e25 | 1852 | writeb(word_or_byte, memaddr + head + cmdStart + 2); |
1da177e4 | 1853 | /* Below byte2 is bits to reset */ |
f2cf8e25 AC |
1854 | writeb(byte2, memaddr + head + cmdStart + 3); |
1855 | } else { | |
1856 | writeb(cmd, memaddr + head + cmdStart + 0); | |
1857 | writeb(ch->channelnum, memaddr + head + cmdStart + 1); | |
1858 | writeb(word_or_byte, memaddr + head + cmdStart + 2); | |
1da177e4 | 1859 | } |
1da177e4 | 1860 | head = (head + 4) & (cmdMax - cmdStart - 4); |
f2cf8e25 | 1861 | writew(head, &ch->mailbox->cin); |
1da177e4 LT |
1862 | count = FEPTIMEOUT; |
1863 | ||
f2cf8e25 | 1864 | for (;;) { /* Begin forever loop */ |
1da177e4 | 1865 | count--; |
f2cf8e25 | 1866 | if (count == 0) { |
1da177e4 LT |
1867 | printk(KERN_ERR "<Error> - Fep not responding in fepcmd()\n"); |
1868 | return; | |
1869 | } | |
f2cf8e25 AC |
1870 | head = readw(&ch->mailbox->cin); |
1871 | cmdTail = readw(&ch->mailbox->cout); | |
1da177e4 | 1872 | n = (head - cmdTail) & (cmdMax - cmdStart - 4); |
1da177e4 LT |
1873 | /* ---------------------------------------------------------- |
1874 | Basically this will break when the FEP acknowledges the | |
1875 | command by incrementing cmdTail (Making it equal to head). | |
1876 | ------------------------------------------------------------- */ | |
1da177e4 LT |
1877 | if (n <= ncmds * (sizeof(short) * 4)) |
1878 | break; /* Well nearly forever :-) */ | |
1da177e4 | 1879 | } /* End forever loop */ |
1da177e4 LT |
1880 | } /* End fepcmd */ |
1881 | ||
1882 | /* --------------------------------------------------------------------- | |
1883 | Digi products use fields in their channels structures that are very | |
1884 | similar to the c_cflag and c_iflag fields typically found in UNIX | |
1885 | termios structures. The below three routines allow mappings | |
1886 | between these hardware "flags" and their respective Linux flags. | |
1887 | ------------------------------------------------------------------------- */ | |
1888 | ||
1889 | /* --------------------- Begin termios2digi_h -------------------- */ | |
1890 | ||
1891 | static unsigned termios2digi_h(struct channel *ch, unsigned cflag) | |
1892 | { /* Begin termios2digi_h */ | |
1da177e4 LT |
1893 | unsigned res = 0; |
1894 | ||
f2cf8e25 | 1895 | if (cflag & CRTSCTS) { |
1da177e4 LT |
1896 | ch->digiext.digi_flags |= (RTSPACE | CTSPACE); |
1897 | res |= ((ch->m_cts) | (ch->m_rts)); | |
1898 | } | |
1899 | ||
1900 | if (ch->digiext.digi_flags & RTSPACE) | |
1901 | res |= ch->m_rts; | |
1902 | ||
1903 | if (ch->digiext.digi_flags & DTRPACE) | |
1904 | res |= ch->m_dtr; | |
1905 | ||
1906 | if (ch->digiext.digi_flags & CTSPACE) | |
1907 | res |= ch->m_cts; | |
1908 | ||
1909 | if (ch->digiext.digi_flags & DSRPACE) | |
1910 | res |= ch->dsr; | |
1911 | ||
1912 | if (ch->digiext.digi_flags & DCDPACE) | |
1913 | res |= ch->dcd; | |
1914 | ||
1915 | if (res & (ch->m_rts)) | |
1916 | ch->digiext.digi_flags |= RTSPACE; | |
1917 | ||
1918 | if (res & (ch->m_cts)) | |
1919 | ch->digiext.digi_flags |= CTSPACE; | |
1920 | ||
1921 | return res; | |
1922 | ||
1923 | } /* End termios2digi_h */ | |
1924 | ||
1925 | /* --------------------- Begin termios2digi_i -------------------- */ | |
1926 | static unsigned termios2digi_i(struct channel *ch, unsigned iflag) | |
1927 | { /* Begin termios2digi_i */ | |
1928 | ||
1929 | unsigned res = iflag & (IGNBRK | BRKINT | IGNPAR | PARMRK | | |
1930 | INPCK | ISTRIP|IXON|IXANY|IXOFF); | |
1da177e4 LT |
1931 | if (ch->digiext.digi_flags & DIGI_AIXON) |
1932 | res |= IAIXON; | |
1933 | return res; | |
1934 | ||
1935 | } /* End termios2digi_i */ | |
1936 | ||
1937 | /* --------------------- Begin termios2digi_c -------------------- */ | |
1938 | ||
1939 | static unsigned termios2digi_c(struct channel *ch, unsigned cflag) | |
1940 | { /* Begin termios2digi_c */ | |
1941 | ||
1942 | unsigned res = 0; | |
f2cf8e25 | 1943 | if (cflag & CBAUDEX) { /* Begin detected CBAUDEX */ |
1da177e4 | 1944 | ch->digiext.digi_flags |= DIGI_FAST; |
1da177e4 LT |
1945 | /* ------------------------------------------------------------- |
1946 | HUPCL bit is used by FEP to indicate fast baud | |
1947 | table is to be used. | |
1948 | ----------------------------------------------------------------- */ | |
1da177e4 | 1949 | res |= FEP_HUPCL; |
1da177e4 LT |
1950 | } /* End detected CBAUDEX */ |
1951 | else ch->digiext.digi_flags &= ~DIGI_FAST; | |
1da177e4 LT |
1952 | /* ------------------------------------------------------------------- |
1953 | CBAUD has bit position 0x1000 set these days to indicate Linux | |
1954 | baud rate remap. Digi hardware can't handle the bit assignment. | |
1955 | (We use a different bit assignment for high speed.). Clear this | |
1956 | bit out. | |
1957 | ---------------------------------------------------------------------- */ | |
1958 | res |= cflag & ((CBAUD ^ CBAUDEX) | PARODD | PARENB | CSTOPB | CSIZE); | |
1da177e4 LT |
1959 | /* ------------------------------------------------------------- |
1960 | This gets a little confusing. The Digi cards have their own | |
1961 | representation of c_cflags controling baud rate. For the most | |
1962 | part this is identical to the Linux implementation. However; | |
1963 | Digi supports one rate (76800) that Linux doesn't. This means | |
1964 | that the c_cflag entry that would normally mean 76800 for Digi | |
1965 | actually means 115200 under Linux. Without the below mapping, | |
1966 | a stty 115200 would only drive the board at 76800. Since | |
1967 | the rate 230400 is also found after 76800, the same problem afflicts | |
1968 | us when we choose a rate of 230400. Without the below modificiation | |
1969 | stty 230400 would actually give us 115200. | |
1970 | ||
1971 | There are two additional differences. The Linux value for CLOCAL | |
1972 | (0x800; 0004000) has no meaning to the Digi hardware. Also in | |
1973 | later releases of Linux; the CBAUD define has CBAUDEX (0x1000; | |
1974 | 0010000) ored into it (CBAUD = 0x100f as opposed to 0xf). CBAUDEX | |
1975 | should be checked for a screened out prior to termios2digi_c | |
1976 | returning. Since CLOCAL isn't used by the board this can be | |
1977 | ignored as long as the returned value is used only by Digi hardware. | |
f2cf8e25 AC |
1978 | ----------------------------------------------------------------- */ |
1979 | if (cflag & CBAUDEX) { | |
1da177e4 LT |
1980 | /* ------------------------------------------------------------- |
1981 | The below code is trying to guarantee that only baud rates | |
1982 | 115200 and 230400 are remapped. We use exclusive or because | |
1983 | the various baud rates share common bit positions and therefore | |
1984 | can't be tested for easily. | |
1985 | ----------------------------------------------------------------- */ | |
1986 | ||
1987 | ||
1988 | if ((!((cflag & 0x7) ^ (B115200 & ~CBAUDEX))) || | |
1989 | (!((cflag & 0x7) ^ (B230400 & ~CBAUDEX)))) | |
1da177e4 | 1990 | res += 1; |
1da177e4 | 1991 | } |
1da177e4 LT |
1992 | return res; |
1993 | ||
1994 | } /* End termios2digi_c */ | |
1995 | ||
1996 | /* --------------------- Begin epcaparam ----------------------- */ | |
1997 | ||
f2cf8e25 | 1998 | /* Caller must hold the locks */ |
1da177e4 LT |
1999 | static void epcaparam(struct tty_struct *tty, struct channel *ch) |
2000 | { /* Begin epcaparam */ | |
2001 | ||
2002 | unsigned int cmdHead; | |
2003 | struct termios *ts; | |
bc9a5154 | 2004 | struct board_chan __iomem *bc; |
1da177e4 LT |
2005 | unsigned mval, hflow, cflag, iflag; |
2006 | ||
2007 | bc = ch->brdchan; | |
2008 | epcaassert(bc !=0, "bc out of range"); | |
2009 | ||
2010 | assertgwinon(ch); | |
1da177e4 | 2011 | ts = tty->termios; |
f2cf8e25 AC |
2012 | if ((ts->c_cflag & CBAUD) == 0) { /* Begin CBAUD detected */ |
2013 | cmdHead = readw(&bc->rin); | |
bc9a5154 | 2014 | writew(cmdHead, &bc->rout); |
f2cf8e25 | 2015 | cmdHead = readw(&bc->tin); |
1da177e4 LT |
2016 | /* Changing baud in mid-stream transmission can be wonderful */ |
2017 | /* --------------------------------------------------------------- | |
2018 | Flush current transmit buffer by setting cmdTail pointer (tout) | |
2019 | to cmdHead pointer (tin). Hopefully the transmit buffer is empty. | |
2020 | ----------------------------------------------------------------- */ | |
1da177e4 LT |
2021 | fepcmd(ch, STOUT, (unsigned) cmdHead, 0, 0, 0); |
2022 | mval = 0; | |
f2cf8e25 | 2023 | } else { /* Begin CBAUD not detected */ |
1da177e4 LT |
2024 | /* ------------------------------------------------------------------- |
2025 | c_cflags have changed but that change had nothing to do with BAUD. | |
2026 | Propagate the change to the card. | |
2027 | ---------------------------------------------------------------------- */ | |
1da177e4 | 2028 | cflag = termios2digi_c(ch, ts->c_cflag); |
f2cf8e25 | 2029 | if (cflag != ch->fepcflag) { |
1da177e4 LT |
2030 | ch->fepcflag = cflag; |
2031 | /* Set baud rate, char size, stop bits, parity */ | |
2032 | fepcmd(ch, SETCTRLFLAGS, (unsigned) cflag, 0, 0, 0); | |
2033 | } | |
1da177e4 LT |
2034 | /* ---------------------------------------------------------------- |
2035 | If the user has not forced CLOCAL and if the device is not a | |
2036 | CALLOUT device (Which is always CLOCAL) we set flags such that | |
2037 | the driver will wait on carrier detect. | |
2038 | ------------------------------------------------------------------- */ | |
1da177e4 | 2039 | if (ts->c_cflag & CLOCAL) |
1da177e4 | 2040 | ch->asyncflags &= ~ASYNC_CHECK_CD; |
1da177e4 | 2041 | else |
1da177e4 | 2042 | ch->asyncflags |= ASYNC_CHECK_CD; |
1da177e4 | 2043 | mval = ch->m_dtr | ch->m_rts; |
1da177e4 | 2044 | } /* End CBAUD not detected */ |
1da177e4 | 2045 | iflag = termios2digi_i(ch, ts->c_iflag); |
1da177e4 | 2046 | /* Check input mode flags */ |
f2cf8e25 | 2047 | if (iflag != ch->fepiflag) { |
1da177e4 | 2048 | ch->fepiflag = iflag; |
1da177e4 LT |
2049 | /* --------------------------------------------------------------- |
2050 | Command sets channels iflag structure on the board. Such things | |
2051 | as input soft flow control, handling of parity errors, and | |
2052 | break handling are all set here. | |
2053 | ------------------------------------------------------------------- */ | |
1da177e4 LT |
2054 | /* break handling, parity handling, input stripping, flow control chars */ |
2055 | fepcmd(ch, SETIFLAGS, (unsigned int) ch->fepiflag, 0, 0, 0); | |
2056 | } | |
1da177e4 LT |
2057 | /* --------------------------------------------------------------- |
2058 | Set the board mint value for this channel. This will cause hardware | |
2059 | events to be generated each time the DCD signal (Described in mint) | |
2060 | changes. | |
2061 | ------------------------------------------------------------------- */ | |
f2cf8e25 | 2062 | writeb(ch->dcd, &bc->mint); |
1da177e4 LT |
2063 | if ((ts->c_cflag & CLOCAL) || (ch->digiext.digi_flags & DIGI_FORCEDCD)) |
2064 | if (ch->digiext.digi_flags & DIGI_FORCEDCD) | |
f2cf8e25 AC |
2065 | writeb(0, &bc->mint); |
2066 | ch->imodem = readb(&bc->mstat); | |
1da177e4 | 2067 | hflow = termios2digi_h(ch, ts->c_cflag); |
f2cf8e25 | 2068 | if (hflow != ch->hflow) { |
1da177e4 | 2069 | ch->hflow = hflow; |
1da177e4 LT |
2070 | /* -------------------------------------------------------------- |
2071 | Hard flow control has been selected but the board is not | |
2072 | using it. Activate hard flow control now. | |
2073 | ----------------------------------------------------------------- */ | |
1da177e4 LT |
2074 | fepcmd(ch, SETHFLOW, hflow, 0xff, 0, 1); |
2075 | } | |
1da177e4 LT |
2076 | mval ^= ch->modemfake & (mval ^ ch->modem); |
2077 | ||
f2cf8e25 | 2078 | if (ch->omodem ^ mval) { |
1da177e4 | 2079 | ch->omodem = mval; |
1da177e4 LT |
2080 | /* -------------------------------------------------------------- |
2081 | The below command sets the DTR and RTS mstat structure. If | |
2082 | hard flow control is NOT active these changes will drive the | |
2083 | output of the actual DTR and RTS lines. If hard flow control | |
2084 | is active, the changes will be saved in the mstat structure and | |
2085 | only asserted when hard flow control is turned off. | |
2086 | ----------------------------------------------------------------- */ | |
2087 | ||
2088 | /* First reset DTR & RTS; then set them */ | |
2089 | fepcmd(ch, SETMODEM, 0, ((ch->m_dtr)|(ch->m_rts)), 0, 1); | |
2090 | fepcmd(ch, SETMODEM, mval, 0, 0, 1); | |
1da177e4 | 2091 | } |
f2cf8e25 | 2092 | if (ch->startc != ch->fepstartc || ch->stopc != ch->fepstopc) { |
1da177e4 LT |
2093 | ch->fepstartc = ch->startc; |
2094 | ch->fepstopc = ch->stopc; | |
1da177e4 LT |
2095 | /* ------------------------------------------------------------ |
2096 | The XON / XOFF characters have changed; propagate these | |
2097 | changes to the card. | |
2098 | --------------------------------------------------------------- */ | |
1da177e4 LT |
2099 | fepcmd(ch, SONOFFC, ch->fepstartc, ch->fepstopc, 0, 1); |
2100 | } | |
f2cf8e25 | 2101 | if (ch->startca != ch->fepstartca || ch->stopca != ch->fepstopca) { |
1da177e4 LT |
2102 | ch->fepstartca = ch->startca; |
2103 | ch->fepstopca = ch->stopca; | |
1da177e4 LT |
2104 | /* --------------------------------------------------------------- |
2105 | Similar to the above, this time the auxilarly XON / XOFF | |
2106 | characters have changed; propagate these changes to the card. | |
2107 | ------------------------------------------------------------------ */ | |
1da177e4 LT |
2108 | fepcmd(ch, SAUXONOFFC, ch->fepstartca, ch->fepstopca, 0, 1); |
2109 | } | |
1da177e4 LT |
2110 | } /* End epcaparam */ |
2111 | ||
2112 | /* --------------------- Begin receive_data ----------------------- */ | |
f2cf8e25 | 2113 | /* Caller holds lock */ |
1da177e4 LT |
2114 | static void receive_data(struct channel *ch) |
2115 | { /* Begin receive_data */ | |
2116 | ||
2117 | unchar *rptr; | |
2118 | struct termios *ts = NULL; | |
2119 | struct tty_struct *tty; | |
bc9a5154 | 2120 | struct board_chan __iomem *bc; |
f2cf8e25 AC |
2121 | int dataToRead, wrapgap, bytesAvailable; |
2122 | unsigned int tail, head; | |
1da177e4 | 2123 | unsigned int wrapmask; |
1da177e4 | 2124 | |
1da177e4 LT |
2125 | /* --------------------------------------------------------------- |
2126 | This routine is called by doint when a receive data event | |
2127 | has taken place. | |
2128 | ------------------------------------------------------------------- */ | |
2129 | ||
2130 | globalwinon(ch); | |
1da177e4 LT |
2131 | if (ch->statusflags & RXSTOPPED) |
2132 | return; | |
1da177e4 LT |
2133 | tty = ch->tty; |
2134 | if (tty) | |
2135 | ts = tty->termios; | |
1da177e4 | 2136 | bc = ch->brdchan; |
f2cf8e25 | 2137 | BUG_ON(!bc); |
1da177e4 LT |
2138 | wrapmask = ch->rxbufsize - 1; |
2139 | ||
2140 | /* --------------------------------------------------------------------- | |
2141 | Get the head and tail pointers to the receiver queue. Wrap the | |
2142 | head pointer if it has reached the end of the buffer. | |
2143 | ------------------------------------------------------------------------ */ | |
f2cf8e25 | 2144 | head = readw(&bc->rin); |
1da177e4 | 2145 | head &= wrapmask; |
f2cf8e25 | 2146 | tail = readw(&bc->rout) & wrapmask; |
1da177e4 LT |
2147 | |
2148 | bytesAvailable = (head - tail) & wrapmask; | |
1da177e4 LT |
2149 | if (bytesAvailable == 0) |
2150 | return; | |
2151 | ||
2152 | /* ------------------------------------------------------------------ | |
2153 | If CREAD bit is off or device not open, set TX tail to head | |
2154 | --------------------------------------------------------------------- */ | |
2155 | ||
f2cf8e25 | 2156 | if (!tty || !ts || !(ts->c_cflag & CREAD)) { |
bc9a5154 | 2157 | writew(head, &bc->rout); |
1da177e4 LT |
2158 | return; |
2159 | } | |
2160 | ||
33f0f88f | 2161 | if (tty_buffer_request_room(tty, bytesAvailable + 1) == 0) |
1da177e4 LT |
2162 | return; |
2163 | ||
f2cf8e25 AC |
2164 | if (readb(&bc->orun)) { |
2165 | writeb(0, &bc->orun); | |
2166 | printk(KERN_WARNING "epca; overrun! DigiBoard device %s\n",tty->name); | |
33f0f88f | 2167 | tty_insert_flip_char(tty, 0, TTY_OVERRUN); |
1da177e4 | 2168 | } |
1da177e4 | 2169 | rxwinon(ch); |
f2cf8e25 | 2170 | while (bytesAvailable > 0) { /* Begin while there is data on the card */ |
1da177e4 | 2171 | wrapgap = (head >= tail) ? head - tail : ch->rxbufsize - tail; |
1da177e4 LT |
2172 | /* --------------------------------------------------------------- |
2173 | Even if head has wrapped around only report the amount of | |
2174 | data to be equal to the size - tail. Remember memcpy can't | |
2175 | automaticly wrap around the receive buffer. | |
2176 | ----------------------------------------------------------------- */ | |
1da177e4 | 2177 | dataToRead = (wrapgap < bytesAvailable) ? wrapgap : bytesAvailable; |
1da177e4 LT |
2178 | /* -------------------------------------------------------------- |
2179 | Make sure we don't overflow the buffer | |
2180 | ----------------------------------------------------------------- */ | |
33f0f88f | 2181 | dataToRead = tty_prepare_flip_string(tty, &rptr, dataToRead); |
1da177e4 LT |
2182 | if (dataToRead == 0) |
2183 | break; | |
1da177e4 LT |
2184 | /* --------------------------------------------------------------- |
2185 | Move data read from our card into the line disciplines buffer | |
2186 | for translation if necessary. | |
2187 | ------------------------------------------------------------------ */ | |
f2cf8e25 | 2188 | memcpy_fromio(rptr, ch->rxptr + tail, dataToRead); |
1da177e4 LT |
2189 | tail = (tail + dataToRead) & wrapmask; |
2190 | bytesAvailable -= dataToRead; | |
1da177e4 | 2191 | } /* End while there is data on the card */ |
1da177e4 | 2192 | globalwinon(ch); |
f2cf8e25 | 2193 | writew(tail, &bc->rout); |
1da177e4 LT |
2194 | /* Must be called with global data */ |
2195 | tty_schedule_flip(ch->tty); | |
2196 | return; | |
1da177e4 LT |
2197 | } /* End receive_data */ |
2198 | ||
2199 | static int info_ioctl(struct tty_struct *tty, struct file * file, | |
2200 | unsigned int cmd, unsigned long arg) | |
2201 | { | |
2202 | switch (cmd) | |
2203 | { /* Begin switch cmd */ | |
1da177e4 LT |
2204 | case DIGI_GETINFO: |
2205 | { /* Begin case DIGI_GETINFO */ | |
1da177e4 LT |
2206 | struct digi_info di ; |
2207 | int brd; | |
2208 | ||
f2cf8e25 AC |
2209 | if(get_user(brd, (unsigned int __user *)arg)) |
2210 | return -EFAULT; | |
2211 | if (brd < 0 || brd >= num_cards || num_cards == 0) | |
2212 | return -ENODEV; | |
1da177e4 LT |
2213 | |
2214 | memset(&di, 0, sizeof(di)); | |
2215 | ||
2216 | di.board = brd ; | |
2217 | di.status = boards[brd].status; | |
2218 | di.type = boards[brd].type ; | |
2219 | di.numports = boards[brd].numports ; | |
f2cf8e25 AC |
2220 | /* Legacy fixups - just move along nothing to see */ |
2221 | di.port = (unsigned char *)boards[brd].port ; | |
2222 | di.membase = (unsigned char *)boards[brd].membase ; | |
1da177e4 LT |
2223 | |
2224 | if (copy_to_user((void __user *)arg, &di, sizeof (di))) | |
2225 | return -EFAULT; | |
2226 | break; | |
2227 | ||
2228 | } /* End case DIGI_GETINFO */ | |
2229 | ||
2230 | case DIGI_POLLER: | |
2231 | { /* Begin case DIGI_POLLER */ | |
2232 | ||
2233 | int brd = arg & 0xff000000 >> 16 ; | |
2234 | unsigned char state = arg & 0xff ; | |
2235 | ||
f2cf8e25 AC |
2236 | if (brd < 0 || brd >= num_cards) { |
2237 | printk(KERN_ERR "epca: DIGI POLLER : brd not valid!\n"); | |
1da177e4 LT |
2238 | return (-ENODEV); |
2239 | } | |
1da177e4 LT |
2240 | digi_poller_inhibited = state ; |
2241 | break ; | |
1da177e4 LT |
2242 | } /* End case DIGI_POLLER */ |
2243 | ||
2244 | case DIGI_INIT: | |
2245 | { /* Begin case DIGI_INIT */ | |
1da177e4 LT |
2246 | /* ------------------------------------------------------------ |
2247 | This call is made by the apps to complete the initilization | |
2248 | of the board(s). This routine is responsible for setting | |
2249 | the card to its initial state and setting the drivers control | |
2250 | fields to the sutianle settings for the card in question. | |
2251 | ---------------------------------------------------------------- */ | |
1da177e4 LT |
2252 | int crd ; |
2253 | for (crd = 0; crd < num_cards; crd++) | |
2254 | post_fep_init (crd); | |
1da177e4 | 2255 | break ; |
1da177e4 | 2256 | } /* End case DIGI_INIT */ |
1da177e4 | 2257 | default: |
f2cf8e25 | 2258 | return -ENOTTY; |
1da177e4 LT |
2259 | } /* End switch cmd */ |
2260 | return (0) ; | |
2261 | } | |
2262 | /* --------------------- Begin pc_ioctl ----------------------- */ | |
2263 | ||
2264 | static int pc_tiocmget(struct tty_struct *tty, struct file *file) | |
2265 | { | |
2266 | struct channel *ch = (struct channel *) tty->driver_data; | |
bc9a5154 | 2267 | struct board_chan __iomem *bc; |
1da177e4 LT |
2268 | unsigned int mstat, mflag = 0; |
2269 | unsigned long flags; | |
2270 | ||
2271 | if (ch) | |
2272 | bc = ch->brdchan; | |
2273 | else | |
f2cf8e25 | 2274 | return -EINVAL; |
1da177e4 | 2275 | |
f2cf8e25 | 2276 | spin_lock_irqsave(&epca_lock, flags); |
1da177e4 | 2277 | globalwinon(ch); |
f2cf8e25 | 2278 | mstat = readb(&bc->mstat); |
1da177e4 | 2279 | memoff(ch); |
f2cf8e25 | 2280 | spin_unlock_irqrestore(&epca_lock, flags); |
1da177e4 LT |
2281 | |
2282 | if (mstat & ch->m_dtr) | |
2283 | mflag |= TIOCM_DTR; | |
1da177e4 LT |
2284 | if (mstat & ch->m_rts) |
2285 | mflag |= TIOCM_RTS; | |
1da177e4 LT |
2286 | if (mstat & ch->m_cts) |
2287 | mflag |= TIOCM_CTS; | |
1da177e4 LT |
2288 | if (mstat & ch->dsr) |
2289 | mflag |= TIOCM_DSR; | |
1da177e4 LT |
2290 | if (mstat & ch->m_ri) |
2291 | mflag |= TIOCM_RI; | |
1da177e4 LT |
2292 | if (mstat & ch->dcd) |
2293 | mflag |= TIOCM_CD; | |
1da177e4 LT |
2294 | return mflag; |
2295 | } | |
2296 | ||
2297 | static int pc_tiocmset(struct tty_struct *tty, struct file *file, | |
2298 | unsigned int set, unsigned int clear) | |
2299 | { | |
2300 | struct channel *ch = (struct channel *) tty->driver_data; | |
2301 | unsigned long flags; | |
2302 | ||
f2cf8e25 AC |
2303 | if (!ch) |
2304 | return -EINVAL; | |
1da177e4 | 2305 | |
f2cf8e25 | 2306 | spin_lock_irqsave(&epca_lock, flags); |
1da177e4 LT |
2307 | /* |
2308 | * I think this modemfake stuff is broken. It doesn't | |
2309 | * correctly reflect the behaviour desired by the TIOCM* | |
2310 | * ioctls. Therefore this is probably broken. | |
2311 | */ | |
2312 | if (set & TIOCM_RTS) { | |
2313 | ch->modemfake |= ch->m_rts; | |
2314 | ch->modem |= ch->m_rts; | |
2315 | } | |
2316 | if (set & TIOCM_DTR) { | |
2317 | ch->modemfake |= ch->m_dtr; | |
2318 | ch->modem |= ch->m_dtr; | |
2319 | } | |
2320 | if (clear & TIOCM_RTS) { | |
2321 | ch->modemfake |= ch->m_rts; | |
2322 | ch->modem &= ~ch->m_rts; | |
2323 | } | |
2324 | if (clear & TIOCM_DTR) { | |
2325 | ch->modemfake |= ch->m_dtr; | |
2326 | ch->modem &= ~ch->m_dtr; | |
2327 | } | |
1da177e4 | 2328 | globalwinon(ch); |
1da177e4 LT |
2329 | /* -------------------------------------------------------------- |
2330 | The below routine generally sets up parity, baud, flow control | |
2331 | issues, etc.... It effect both control flags and input flags. | |
2332 | ------------------------------------------------------------------ */ | |
1da177e4 LT |
2333 | epcaparam(tty,ch); |
2334 | memoff(ch); | |
f2cf8e25 | 2335 | spin_unlock_irqrestore(&epca_lock, flags); |
1da177e4 LT |
2336 | return 0; |
2337 | } | |
2338 | ||
2339 | static int pc_ioctl(struct tty_struct *tty, struct file * file, | |
2340 | unsigned int cmd, unsigned long arg) | |
2341 | { /* Begin pc_ioctl */ | |
2342 | ||
2343 | digiflow_t dflow; | |
2344 | int retval; | |
2345 | unsigned long flags; | |
2346 | unsigned int mflag, mstat; | |
2347 | unsigned char startc, stopc; | |
bc9a5154 | 2348 | struct board_chan __iomem *bc; |
1da177e4 LT |
2349 | struct channel *ch = (struct channel *) tty->driver_data; |
2350 | void __user *argp = (void __user *)arg; | |
2351 | ||
2352 | if (ch) | |
2353 | bc = ch->brdchan; | |
2354 | else | |
f2cf8e25 | 2355 | return -EINVAL; |
1da177e4 LT |
2356 | |
2357 | /* ------------------------------------------------------------------- | |
2358 | For POSIX compliance we need to add more ioctls. See tty_ioctl.c | |
2359 | in /usr/src/linux/drivers/char for a good example. In particular | |
2360 | think about adding TCSETAF, TCSETAW, TCSETA, TCSETSF, TCSETSW, TCSETS. | |
2361 | ---------------------------------------------------------------------- */ | |
2362 | ||
2363 | switch (cmd) | |
2364 | { /* Begin switch cmd */ | |
2365 | ||
2366 | case TCGETS: | |
f2cf8e25 | 2367 | if (copy_to_user(argp, tty->termios, sizeof(struct termios))) |
1da177e4 | 2368 | return -EFAULT; |
f2cf8e25 | 2369 | return 0; |
1da177e4 LT |
2370 | case TCGETA: |
2371 | return get_termio(tty, argp); | |
1da177e4 | 2372 | case TCSBRK: /* SVID version: non-zero arg --> no break */ |
1da177e4 LT |
2373 | retval = tty_check_change(tty); |
2374 | if (retval) | |
2375 | return retval; | |
1da177e4 | 2376 | /* Setup an event to indicate when the transmit buffer empties */ |
f2cf8e25 | 2377 | spin_lock_irqsave(&epca_lock, flags); |
1da177e4 | 2378 | setup_empty_event(tty,ch); |
f2cf8e25 | 2379 | spin_unlock_irqrestore(&epca_lock, flags); |
1da177e4 LT |
2380 | tty_wait_until_sent(tty, 0); |
2381 | if (!arg) | |
2382 | digi_send_break(ch, HZ/4); /* 1/4 second */ | |
2383 | return 0; | |
1da177e4 | 2384 | case TCSBRKP: /* support for POSIX tcsendbreak() */ |
1da177e4 LT |
2385 | retval = tty_check_change(tty); |
2386 | if (retval) | |
2387 | return retval; | |
2388 | ||
2389 | /* Setup an event to indicate when the transmit buffer empties */ | |
f2cf8e25 | 2390 | spin_lock_irqsave(&epca_lock, flags); |
1da177e4 | 2391 | setup_empty_event(tty,ch); |
f2cf8e25 | 2392 | spin_unlock_irqrestore(&epca_lock, flags); |
1da177e4 LT |
2393 | tty_wait_until_sent(tty, 0); |
2394 | digi_send_break(ch, arg ? arg*(HZ/10) : HZ/4); | |
2395 | return 0; | |
1da177e4 LT |
2396 | case TIOCGSOFTCAR: |
2397 | if (put_user(C_CLOCAL(tty)?1:0, (unsigned long __user *)arg)) | |
2398 | return -EFAULT; | |
2399 | return 0; | |
1da177e4 LT |
2400 | case TIOCSSOFTCAR: |
2401 | { | |
2402 | unsigned int value; | |
2403 | ||
2404 | if (get_user(value, (unsigned __user *)argp)) | |
2405 | return -EFAULT; | |
2406 | tty->termios->c_cflag = | |
2407 | ((tty->termios->c_cflag & ~CLOCAL) | | |
2408 | (value ? CLOCAL : 0)); | |
2409 | return 0; | |
2410 | } | |
1da177e4 LT |
2411 | case TIOCMODG: |
2412 | mflag = pc_tiocmget(tty, file); | |
2413 | if (put_user(mflag, (unsigned long __user *)argp)) | |
2414 | return -EFAULT; | |
2415 | break; | |
1da177e4 LT |
2416 | case TIOCMODS: |
2417 | if (get_user(mstat, (unsigned __user *)argp)) | |
2418 | return -EFAULT; | |
2419 | return pc_tiocmset(tty, file, mstat, ~mstat); | |
1da177e4 | 2420 | case TIOCSDTR: |
f2cf8e25 | 2421 | spin_lock_irqsave(&epca_lock, flags); |
1da177e4 | 2422 | ch->omodem |= ch->m_dtr; |
1da177e4 LT |
2423 | globalwinon(ch); |
2424 | fepcmd(ch, SETMODEM, ch->m_dtr, 0, 10, 1); | |
2425 | memoff(ch); | |
f2cf8e25 | 2426 | spin_unlock_irqrestore(&epca_lock, flags); |
1da177e4 LT |
2427 | break; |
2428 | ||
2429 | case TIOCCDTR: | |
f2cf8e25 | 2430 | spin_lock_irqsave(&epca_lock, flags); |
1da177e4 | 2431 | ch->omodem &= ~ch->m_dtr; |
1da177e4 LT |
2432 | globalwinon(ch); |
2433 | fepcmd(ch, SETMODEM, 0, ch->m_dtr, 10, 1); | |
2434 | memoff(ch); | |
f2cf8e25 | 2435 | spin_unlock_irqrestore(&epca_lock, flags); |
1da177e4 | 2436 | break; |
1da177e4 LT |
2437 | case DIGI_GETA: |
2438 | if (copy_to_user(argp, &ch->digiext, sizeof(digi_t))) | |
2439 | return -EFAULT; | |
2440 | break; | |
1da177e4 LT |
2441 | case DIGI_SETAW: |
2442 | case DIGI_SETAF: | |
f2cf8e25 | 2443 | if (cmd == DIGI_SETAW) { |
1da177e4 | 2444 | /* Setup an event to indicate when the transmit buffer empties */ |
f2cf8e25 | 2445 | spin_lock_irqsave(&epca_lock, flags); |
1da177e4 | 2446 | setup_empty_event(tty,ch); |
f2cf8e25 | 2447 | spin_unlock_irqrestore(&epca_lock, flags); |
1da177e4 | 2448 | tty_wait_until_sent(tty, 0); |
f2cf8e25 | 2449 | } else { |
1da177e4 LT |
2450 | /* ldisc lock already held in ioctl */ |
2451 | if (tty->ldisc.flush_buffer) | |
2452 | tty->ldisc.flush_buffer(tty); | |
2453 | } | |
1da177e4 | 2454 | /* Fall Thru */ |
1da177e4 LT |
2455 | case DIGI_SETA: |
2456 | if (copy_from_user(&ch->digiext, argp, sizeof(digi_t))) | |
2457 | return -EFAULT; | |
2458 | ||
f2cf8e25 | 2459 | if (ch->digiext.digi_flags & DIGI_ALTPIN) { |
1da177e4 LT |
2460 | ch->dcd = ch->m_dsr; |
2461 | ch->dsr = ch->m_dcd; | |
f2cf8e25 | 2462 | } else { |
1da177e4 LT |
2463 | ch->dcd = ch->m_dcd; |
2464 | ch->dsr = ch->m_dsr; | |
2465 | } | |
2466 | ||
f2cf8e25 | 2467 | spin_lock_irqsave(&epca_lock, flags); |
1da177e4 LT |
2468 | globalwinon(ch); |
2469 | ||
2470 | /* ----------------------------------------------------------------- | |
2471 | The below routine generally sets up parity, baud, flow control | |
2472 | issues, etc.... It effect both control flags and input flags. | |
2473 | ------------------------------------------------------------------- */ | |
2474 | ||
2475 | epcaparam(tty,ch); | |
2476 | memoff(ch); | |
f2cf8e25 | 2477 | spin_unlock_irqrestore(&epca_lock, flags); |
1da177e4 LT |
2478 | break; |
2479 | ||
2480 | case DIGI_GETFLOW: | |
2481 | case DIGI_GETAFLOW: | |
f2cf8e25 | 2482 | spin_lock_irqsave(&epca_lock, flags); |
1da177e4 | 2483 | globalwinon(ch); |
f2cf8e25 AC |
2484 | if (cmd == DIGI_GETFLOW) { |
2485 | dflow.startc = readb(&bc->startc); | |
2486 | dflow.stopc = readb(&bc->stopc); | |
2487 | } else { | |
2488 | dflow.startc = readb(&bc->startca); | |
2489 | dflow.stopc = readb(&bc->stopca); | |
1da177e4 LT |
2490 | } |
2491 | memoff(ch); | |
f2cf8e25 | 2492 | spin_unlock_irqrestore(&epca_lock, flags); |
1da177e4 LT |
2493 | |
2494 | if (copy_to_user(argp, &dflow, sizeof(dflow))) | |
2495 | return -EFAULT; | |
2496 | break; | |
2497 | ||
2498 | case DIGI_SETAFLOW: | |
2499 | case DIGI_SETFLOW: | |
f2cf8e25 | 2500 | if (cmd == DIGI_SETFLOW) { |
1da177e4 LT |
2501 | startc = ch->startc; |
2502 | stopc = ch->stopc; | |
f2cf8e25 | 2503 | } else { |
1da177e4 LT |
2504 | startc = ch->startca; |
2505 | stopc = ch->stopca; | |
2506 | } | |
2507 | ||
2508 | if (copy_from_user(&dflow, argp, sizeof(dflow))) | |
2509 | return -EFAULT; | |
2510 | ||
f2cf8e25 AC |
2511 | if (dflow.startc != startc || dflow.stopc != stopc) { /* Begin if setflow toggled */ |
2512 | spin_lock_irqsave(&epca_lock, flags); | |
1da177e4 LT |
2513 | globalwinon(ch); |
2514 | ||
f2cf8e25 | 2515 | if (cmd == DIGI_SETFLOW) { |
1da177e4 LT |
2516 | ch->fepstartc = ch->startc = dflow.startc; |
2517 | ch->fepstopc = ch->stopc = dflow.stopc; | |
2518 | fepcmd(ch, SONOFFC, ch->fepstartc, ch->fepstopc, 0, 1); | |
f2cf8e25 | 2519 | } else { |
1da177e4 LT |
2520 | ch->fepstartca = ch->startca = dflow.startc; |
2521 | ch->fepstopca = ch->stopca = dflow.stopc; | |
2522 | fepcmd(ch, SAUXONOFFC, ch->fepstartca, ch->fepstopca, 0, 1); | |
2523 | } | |
2524 | ||
f2cf8e25 | 2525 | if (ch->statusflags & TXSTOPPED) |
1da177e4 LT |
2526 | pc_start(tty); |
2527 | ||
2528 | memoff(ch); | |
f2cf8e25 | 2529 | spin_unlock_irqrestore(&epca_lock, flags); |
1da177e4 LT |
2530 | } /* End if setflow toggled */ |
2531 | break; | |
1da177e4 LT |
2532 | default: |
2533 | return -ENOIOCTLCMD; | |
1da177e4 | 2534 | } /* End switch cmd */ |
1da177e4 | 2535 | return 0; |
1da177e4 LT |
2536 | } /* End pc_ioctl */ |
2537 | ||
2538 | /* --------------------- Begin pc_set_termios ----------------------- */ | |
2539 | ||
2540 | static void pc_set_termios(struct tty_struct *tty, struct termios *old_termios) | |
2541 | { /* Begin pc_set_termios */ | |
2542 | ||
2543 | struct channel *ch; | |
2544 | unsigned long flags; | |
1da177e4 LT |
2545 | /* --------------------------------------------------------- |
2546 | verifyChannel returns the channel from the tty struct | |
2547 | if it is valid. This serves as a sanity check. | |
2548 | ------------------------------------------------------------- */ | |
f2cf8e25 AC |
2549 | if ((ch = verifyChannel(tty)) != NULL) { /* Begin if channel valid */ |
2550 | spin_lock_irqsave(&epca_lock, flags); | |
1da177e4 LT |
2551 | globalwinon(ch); |
2552 | epcaparam(tty, ch); | |
2553 | memoff(ch); | |
f2cf8e25 | 2554 | spin_unlock_irqrestore(&epca_lock, flags); |
1da177e4 LT |
2555 | |
2556 | if ((old_termios->c_cflag & CRTSCTS) && | |
2557 | ((tty->termios->c_cflag & CRTSCTS) == 0)) | |
2558 | tty->hw_stopped = 0; | |
2559 | ||
2560 | if (!(old_termios->c_cflag & CLOCAL) && | |
2561 | (tty->termios->c_cflag & CLOCAL)) | |
2562 | wake_up_interruptible(&ch->open_wait); | |
2563 | ||
1da177e4 LT |
2564 | } /* End if channel valid */ |
2565 | ||
2566 | } /* End pc_set_termios */ | |
2567 | ||
2568 | /* --------------------- Begin do_softint ----------------------- */ | |
2569 | ||
2570 | static void do_softint(void *private_) | |
2571 | { /* Begin do_softint */ | |
1da177e4 | 2572 | struct channel *ch = (struct channel *) private_; |
1da177e4 | 2573 | /* Called in response to a modem change event */ |
f2cf8e25 | 2574 | if (ch && ch->magic == EPCA_MAGIC) { /* Begin EPCA_MAGIC */ |
1da177e4 LT |
2575 | struct tty_struct *tty = ch->tty; |
2576 | ||
f2cf8e25 AC |
2577 | if (tty && tty->driver_data) { |
2578 | if (test_and_clear_bit(EPCA_EVENT_HANGUP, &ch->event)) { /* Begin if clear_bit */ | |
1da177e4 LT |
2579 | tty_hangup(tty); /* FIXME: module removal race here - AKPM */ |
2580 | wake_up_interruptible(&ch->open_wait); | |
2581 | ch->asyncflags &= ~ASYNC_NORMAL_ACTIVE; | |
1da177e4 LT |
2582 | } /* End if clear_bit */ |
2583 | } | |
1da177e4 LT |
2584 | } /* End EPCA_MAGIC */ |
2585 | } /* End do_softint */ | |
2586 | ||
2587 | /* ------------------------------------------------------------ | |
2588 | pc_stop and pc_start provide software flow control to the | |
2589 | routine and the pc_ioctl routine. | |
2590 | ---------------------------------------------------------------- */ | |
2591 | ||
2592 | /* --------------------- Begin pc_stop ----------------------- */ | |
2593 | ||
2594 | static void pc_stop(struct tty_struct *tty) | |
2595 | { /* Begin pc_stop */ | |
2596 | ||
2597 | struct channel *ch; | |
2598 | unsigned long flags; | |
1da177e4 LT |
2599 | /* --------------------------------------------------------- |
2600 | verifyChannel returns the channel from the tty struct | |
2601 | if it is valid. This serves as a sanity check. | |
2602 | ------------------------------------------------------------- */ | |
f2cf8e25 AC |
2603 | if ((ch = verifyChannel(tty)) != NULL) { /* Begin if valid channel */ |
2604 | spin_lock_irqsave(&epca_lock, flags); | |
2605 | if ((ch->statusflags & TXSTOPPED) == 0) { /* Begin if transmit stop requested */ | |
1da177e4 | 2606 | globalwinon(ch); |
1da177e4 | 2607 | /* STOP transmitting now !! */ |
1da177e4 | 2608 | fepcmd(ch, PAUSETX, 0, 0, 0, 0); |
1da177e4 LT |
2609 | ch->statusflags |= TXSTOPPED; |
2610 | memoff(ch); | |
1da177e4 | 2611 | } /* End if transmit stop requested */ |
f2cf8e25 | 2612 | spin_unlock_irqrestore(&epca_lock, flags); |
1da177e4 | 2613 | } /* End if valid channel */ |
1da177e4 LT |
2614 | } /* End pc_stop */ |
2615 | ||
2616 | /* --------------------- Begin pc_start ----------------------- */ | |
2617 | ||
2618 | static void pc_start(struct tty_struct *tty) | |
2619 | { /* Begin pc_start */ | |
1da177e4 | 2620 | struct channel *ch; |
1da177e4 LT |
2621 | /* --------------------------------------------------------- |
2622 | verifyChannel returns the channel from the tty struct | |
2623 | if it is valid. This serves as a sanity check. | |
2624 | ------------------------------------------------------------- */ | |
f2cf8e25 | 2625 | if ((ch = verifyChannel(tty)) != NULL) { /* Begin if channel valid */ |
1da177e4 | 2626 | unsigned long flags; |
f2cf8e25 | 2627 | spin_lock_irqsave(&epca_lock, flags); |
1da177e4 | 2628 | /* Just in case output was resumed because of a change in Digi-flow */ |
f2cf8e25 | 2629 | if (ch->statusflags & TXSTOPPED) { /* Begin transmit resume requested */ |
bc9a5154 | 2630 | struct board_chan __iomem *bc; |
1da177e4 LT |
2631 | globalwinon(ch); |
2632 | bc = ch->brdchan; | |
2633 | if (ch->statusflags & LOWWAIT) | |
f2cf8e25 | 2634 | writeb(1, &bc->ilow); |
1da177e4 | 2635 | /* Okay, you can start transmitting again... */ |
1da177e4 | 2636 | fepcmd(ch, RESUMETX, 0, 0, 0, 0); |
1da177e4 LT |
2637 | ch->statusflags &= ~TXSTOPPED; |
2638 | memoff(ch); | |
1da177e4 | 2639 | } /* End transmit resume requested */ |
f2cf8e25 | 2640 | spin_unlock_irqrestore(&epca_lock, flags); |
1da177e4 | 2641 | } /* End if channel valid */ |
1da177e4 LT |
2642 | } /* End pc_start */ |
2643 | ||
2644 | /* ------------------------------------------------------------------ | |
2645 | The below routines pc_throttle and pc_unthrottle are used | |
2646 | to slow (And resume) the receipt of data into the kernels | |
2647 | receive buffers. The exact occurrence of this depends on the | |
2648 | size of the kernels receive buffer and what the 'watermarks' | |
2649 | are set to for that buffer. See the n_ttys.c file for more | |
2650 | details. | |
2651 | ______________________________________________________________________ */ | |
2652 | /* --------------------- Begin throttle ----------------------- */ | |
2653 | ||
2654 | static void pc_throttle(struct tty_struct * tty) | |
2655 | { /* Begin pc_throttle */ | |
1da177e4 LT |
2656 | struct channel *ch; |
2657 | unsigned long flags; | |
1da177e4 LT |
2658 | /* --------------------------------------------------------- |
2659 | verifyChannel returns the channel from the tty struct | |
2660 | if it is valid. This serves as a sanity check. | |
2661 | ------------------------------------------------------------- */ | |
f2cf8e25 AC |
2662 | if ((ch = verifyChannel(tty)) != NULL) { /* Begin if channel valid */ |
2663 | spin_lock_irqsave(&epca_lock, flags); | |
2664 | if ((ch->statusflags & RXSTOPPED) == 0) { | |
1da177e4 LT |
2665 | globalwinon(ch); |
2666 | fepcmd(ch, PAUSERX, 0, 0, 0, 0); | |
1da177e4 LT |
2667 | ch->statusflags |= RXSTOPPED; |
2668 | memoff(ch); | |
2669 | } | |
f2cf8e25 | 2670 | spin_unlock_irqrestore(&epca_lock, flags); |
1da177e4 | 2671 | } /* End if channel valid */ |
1da177e4 LT |
2672 | } /* End pc_throttle */ |
2673 | ||
2674 | /* --------------------- Begin unthrottle ----------------------- */ | |
2675 | ||
2676 | static void pc_unthrottle(struct tty_struct *tty) | |
2677 | { /* Begin pc_unthrottle */ | |
1da177e4 LT |
2678 | struct channel *ch; |
2679 | unsigned long flags; | |
1da177e4 LT |
2680 | /* --------------------------------------------------------- |
2681 | verifyChannel returns the channel from the tty struct | |
2682 | if it is valid. This serves as a sanity check. | |
2683 | ------------------------------------------------------------- */ | |
f2cf8e25 | 2684 | if ((ch = verifyChannel(tty)) != NULL) { /* Begin if channel valid */ |
1da177e4 | 2685 | /* Just in case output was resumed because of a change in Digi-flow */ |
f2cf8e25 AC |
2686 | spin_lock_irqsave(&epca_lock, flags); |
2687 | if (ch->statusflags & RXSTOPPED) { | |
1da177e4 | 2688 | globalwinon(ch); |
1da177e4 | 2689 | fepcmd(ch, RESUMERX, 0, 0, 0, 0); |
1da177e4 LT |
2690 | ch->statusflags &= ~RXSTOPPED; |
2691 | memoff(ch); | |
2692 | } | |
f2cf8e25 | 2693 | spin_unlock_irqrestore(&epca_lock, flags); |
1da177e4 | 2694 | } /* End if channel valid */ |
1da177e4 LT |
2695 | } /* End pc_unthrottle */ |
2696 | ||
2697 | /* --------------------- Begin digi_send_break ----------------------- */ | |
2698 | ||
2699 | void digi_send_break(struct channel *ch, int msec) | |
2700 | { /* Begin digi_send_break */ | |
1da177e4 LT |
2701 | unsigned long flags; |
2702 | ||
f2cf8e25 | 2703 | spin_lock_irqsave(&epca_lock, flags); |
1da177e4 | 2704 | globalwinon(ch); |
1da177e4 LT |
2705 | /* -------------------------------------------------------------------- |
2706 | Maybe I should send an infinite break here, schedule() for | |
2707 | msec amount of time, and then stop the break. This way, | |
2708 | the user can't screw up the FEP by causing digi_send_break() | |
2709 | to be called (i.e. via an ioctl()) more than once in msec amount | |
2710 | of time. Try this for now... | |
2711 | ------------------------------------------------------------------------ */ | |
1da177e4 LT |
2712 | fepcmd(ch, SENDBREAK, msec, 0, 10, 0); |
2713 | memoff(ch); | |
f2cf8e25 | 2714 | spin_unlock_irqrestore(&epca_lock, flags); |
1da177e4 LT |
2715 | } /* End digi_send_break */ |
2716 | ||
2717 | /* --------------------- Begin setup_empty_event ----------------------- */ | |
2718 | ||
f2cf8e25 AC |
2719 | /* Caller MUST hold the lock */ |
2720 | ||
1da177e4 LT |
2721 | static void setup_empty_event(struct tty_struct *tty, struct channel *ch) |
2722 | { /* Begin setup_empty_event */ | |
2723 | ||
bc9a5154 | 2724 | struct board_chan __iomem *bc = ch->brdchan; |
1da177e4 | 2725 | |
1da177e4 LT |
2726 | globalwinon(ch); |
2727 | ch->statusflags |= EMPTYWAIT; | |
1da177e4 LT |
2728 | /* ------------------------------------------------------------------ |
2729 | When set the iempty flag request a event to be generated when the | |
2730 | transmit buffer is empty (If there is no BREAK in progress). | |
2731 | --------------------------------------------------------------------- */ | |
f2cf8e25 | 2732 | writeb(1, &bc->iempty); |
1da177e4 | 2733 | memoff(ch); |
1da177e4 LT |
2734 | } /* End setup_empty_event */ |
2735 | ||
2736 | /* --------------------- Begin get_termio ----------------------- */ | |
2737 | ||
2738 | static int get_termio(struct tty_struct * tty, struct termio __user * termio) | |
2739 | { /* Begin get_termio */ | |
2740 | return kernel_termios_to_user_termio(termio, tty->termios); | |
2741 | } /* End get_termio */ | |
f2cf8e25 | 2742 | |
1da177e4 LT |
2743 | /* ---------------------- Begin epca_setup -------------------------- */ |
2744 | void epca_setup(char *str, int *ints) | |
2745 | { /* Begin epca_setup */ | |
1da177e4 LT |
2746 | struct board_info board; |
2747 | int index, loop, last; | |
2748 | char *temp, *t2; | |
2749 | unsigned len; | |
2750 | ||
2751 | /* ---------------------------------------------------------------------- | |
2752 | If this routine looks a little strange it is because it is only called | |
2753 | if a LILO append command is given to boot the kernel with parameters. | |
2754 | In this way, we can provide the user a method of changing his board | |
2755 | configuration without rebuilding the kernel. | |
2756 | ----------------------------------------------------------------------- */ | |
2757 | if (!liloconfig) | |
2758 | liloconfig = 1; | |
2759 | ||
2760 | memset(&board, 0, sizeof(board)); | |
2761 | ||
2762 | /* Assume the data is int first, later we can change it */ | |
2763 | /* I think that array position 0 of ints holds the number of args */ | |
2764 | for (last = 0, index = 1; index <= ints[0]; index++) | |
2765 | switch(index) | |
2766 | { /* Begin parse switch */ | |
1da177e4 LT |
2767 | case 1: |
2768 | board.status = ints[index]; | |
1da177e4 LT |
2769 | /* --------------------------------------------------------- |
2770 | We check for 2 (As opposed to 1; because 2 is a flag | |
2771 | instructing the driver to ignore epcaconfig.) For this | |
2772 | reason we check for 2. | |
2773 | ------------------------------------------------------------ */ | |
f2cf8e25 | 2774 | if (board.status == 2) { /* Begin ignore epcaconfig as well as lilo cmd line */ |
1da177e4 LT |
2775 | nbdevs = 0; |
2776 | num_cards = 0; | |
2777 | return; | |
2778 | } /* End ignore epcaconfig as well as lilo cmd line */ | |
2779 | ||
f2cf8e25 AC |
2780 | if (board.status > 2) { |
2781 | printk(KERN_ERR "epca_setup: Invalid board status 0x%x\n", board.status); | |
1da177e4 LT |
2782 | invalid_lilo_config = 1; |
2783 | setup_error_code |= INVALID_BOARD_STATUS; | |
2784 | return; | |
2785 | } | |
2786 | last = index; | |
2787 | break; | |
1da177e4 LT |
2788 | case 2: |
2789 | board.type = ints[index]; | |
f2cf8e25 AC |
2790 | if (board.type >= PCIXEM) { |
2791 | printk(KERN_ERR "epca_setup: Invalid board type 0x%x\n", board.type); | |
1da177e4 LT |
2792 | invalid_lilo_config = 1; |
2793 | setup_error_code |= INVALID_BOARD_TYPE; | |
2794 | return; | |
2795 | } | |
2796 | last = index; | |
2797 | break; | |
1da177e4 LT |
2798 | case 3: |
2799 | board.altpin = ints[index]; | |
f2cf8e25 AC |
2800 | if (board.altpin > 1) { |
2801 | printk(KERN_ERR "epca_setup: Invalid board altpin 0x%x\n", board.altpin); | |
1da177e4 LT |
2802 | invalid_lilo_config = 1; |
2803 | setup_error_code |= INVALID_ALTPIN; | |
2804 | return; | |
2805 | } | |
2806 | last = index; | |
2807 | break; | |
2808 | ||
2809 | case 4: | |
2810 | board.numports = ints[index]; | |
f2cf8e25 AC |
2811 | if (board.numports < 2 || board.numports > 256) { |
2812 | printk(KERN_ERR "epca_setup: Invalid board numports 0x%x\n", board.numports); | |
1da177e4 LT |
2813 | invalid_lilo_config = 1; |
2814 | setup_error_code |= INVALID_NUM_PORTS; | |
2815 | return; | |
2816 | } | |
2817 | nbdevs += board.numports; | |
2818 | last = index; | |
2819 | break; | |
2820 | ||
2821 | case 5: | |
f2cf8e25 AC |
2822 | board.port = ints[index]; |
2823 | if (ints[index] <= 0) { | |
2824 | printk(KERN_ERR "epca_setup: Invalid io port 0x%x\n", (unsigned int)board.port); | |
1da177e4 LT |
2825 | invalid_lilo_config = 1; |
2826 | setup_error_code |= INVALID_PORT_BASE; | |
2827 | return; | |
2828 | } | |
2829 | last = index; | |
2830 | break; | |
2831 | ||
2832 | case 6: | |
f2cf8e25 AC |
2833 | board.membase = ints[index]; |
2834 | if (ints[index] <= 0) { | |
2835 | printk(KERN_ERR "epca_setup: Invalid memory base 0x%x\n",(unsigned int)board.membase); | |
1da177e4 LT |
2836 | invalid_lilo_config = 1; |
2837 | setup_error_code |= INVALID_MEM_BASE; | |
2838 | return; | |
2839 | } | |
2840 | last = index; | |
2841 | break; | |
2842 | ||
2843 | default: | |
2844 | printk(KERN_ERR "<Error> - epca_setup: Too many integer parms\n"); | |
2845 | return; | |
2846 | ||
2847 | } /* End parse switch */ | |
2848 | ||
f2cf8e25 | 2849 | while (str && *str) { /* Begin while there is a string arg */ |
1da177e4 LT |
2850 | /* find the next comma or terminator */ |
2851 | temp = str; | |
1da177e4 LT |
2852 | /* While string is not null, and a comma hasn't been found */ |
2853 | while (*temp && (*temp != ',')) | |
2854 | temp++; | |
1da177e4 LT |
2855 | if (!*temp) |
2856 | temp = NULL; | |
2857 | else | |
2858 | *temp++ = 0; | |
1da177e4 LT |
2859 | /* Set index to the number of args + 1 */ |
2860 | index = last + 1; | |
2861 | ||
2862 | switch(index) | |
2863 | { | |
2864 | case 1: | |
2865 | len = strlen(str); | |
2866 | if (strncmp("Disable", str, len) == 0) | |
2867 | board.status = 0; | |
f2cf8e25 | 2868 | else if (strncmp("Enable", str, len) == 0) |
1da177e4 | 2869 | board.status = 1; |
f2cf8e25 AC |
2870 | else { |
2871 | printk(KERN_ERR "epca_setup: Invalid status %s\n", str); | |
1da177e4 LT |
2872 | invalid_lilo_config = 1; |
2873 | setup_error_code |= INVALID_BOARD_STATUS; | |
2874 | return; | |
2875 | } | |
2876 | last = index; | |
2877 | break; | |
2878 | ||
2879 | case 2: | |
1da177e4 LT |
2880 | for(loop = 0; loop < EPCA_NUM_TYPES; loop++) |
2881 | if (strcmp(board_desc[loop], str) == 0) | |
2882 | break; | |
1da177e4 LT |
2883 | /* --------------------------------------------------------------- |
2884 | If the index incremented above refers to a legitamate board | |
2885 | type set it here. | |
2886 | ------------------------------------------------------------------*/ | |
1da177e4 LT |
2887 | if (index < EPCA_NUM_TYPES) |
2888 | board.type = loop; | |
f2cf8e25 AC |
2889 | else { |
2890 | printk(KERN_ERR "epca_setup: Invalid board type: %s\n", str); | |
1da177e4 LT |
2891 | invalid_lilo_config = 1; |
2892 | setup_error_code |= INVALID_BOARD_TYPE; | |
2893 | return; | |
2894 | } | |
2895 | last = index; | |
2896 | break; | |
2897 | ||
2898 | case 3: | |
2899 | len = strlen(str); | |
2900 | if (strncmp("Disable", str, len) == 0) | |
2901 | board.altpin = 0; | |
f2cf8e25 | 2902 | else if (strncmp("Enable", str, len) == 0) |
1da177e4 | 2903 | board.altpin = 1; |
f2cf8e25 AC |
2904 | else { |
2905 | printk(KERN_ERR "epca_setup: Invalid altpin %s\n", str); | |
1da177e4 LT |
2906 | invalid_lilo_config = 1; |
2907 | setup_error_code |= INVALID_ALTPIN; | |
2908 | return; | |
2909 | } | |
2910 | last = index; | |
2911 | break; | |
2912 | ||
2913 | case 4: | |
2914 | t2 = str; | |
2915 | while (isdigit(*t2)) | |
2916 | t2++; | |
2917 | ||
f2cf8e25 AC |
2918 | if (*t2) { |
2919 | printk(KERN_ERR "epca_setup: Invalid port count %s\n", str); | |
1da177e4 LT |
2920 | invalid_lilo_config = 1; |
2921 | setup_error_code |= INVALID_NUM_PORTS; | |
2922 | return; | |
2923 | } | |
2924 | ||
2925 | /* ------------------------------------------------------------ | |
2926 | There is not a man page for simple_strtoul but the code can be | |
2927 | found in vsprintf.c. The first argument is the string to | |
2928 | translate (To an unsigned long obviously), the second argument | |
2929 | can be the address of any character variable or a NULL. If a | |
2930 | variable is given, the end pointer of the string will be stored | |
2931 | in that variable; if a NULL is given the end pointer will | |
2932 | not be returned. The last argument is the base to use. If | |
2933 | a 0 is indicated, the routine will attempt to determine the | |
2934 | proper base by looking at the values prefix (A '0' for octal, | |
2935 | a 'x' for hex, etc ... If a value is given it will use that | |
2936 | value as the base. | |
2937 | ---------------------------------------------------------------- */ | |
2938 | board.numports = simple_strtoul(str, NULL, 0); | |
2939 | nbdevs += board.numports; | |
2940 | last = index; | |
2941 | break; | |
2942 | ||
2943 | case 5: | |
2944 | t2 = str; | |
2945 | while (isxdigit(*t2)) | |
2946 | t2++; | |
2947 | ||
f2cf8e25 AC |
2948 | if (*t2) { |
2949 | printk(KERN_ERR "epca_setup: Invalid i/o address %s\n", str); | |
1da177e4 LT |
2950 | invalid_lilo_config = 1; |
2951 | setup_error_code |= INVALID_PORT_BASE; | |
2952 | return; | |
2953 | } | |
2954 | ||
f2cf8e25 | 2955 | board.port = simple_strtoul(str, NULL, 16); |
1da177e4 LT |
2956 | last = index; |
2957 | break; | |
2958 | ||
2959 | case 6: | |
2960 | t2 = str; | |
2961 | while (isxdigit(*t2)) | |
2962 | t2++; | |
2963 | ||
f2cf8e25 AC |
2964 | if (*t2) { |
2965 | printk(KERN_ERR "epca_setup: Invalid memory base %s\n",str); | |
1da177e4 LT |
2966 | invalid_lilo_config = 1; |
2967 | setup_error_code |= INVALID_MEM_BASE; | |
2968 | return; | |
2969 | } | |
f2cf8e25 | 2970 | board.membase = simple_strtoul(str, NULL, 16); |
1da177e4 LT |
2971 | last = index; |
2972 | break; | |
1da177e4 | 2973 | default: |
f2cf8e25 | 2974 | printk(KERN_ERR "epca: Too many string parms\n"); |
1da177e4 LT |
2975 | return; |
2976 | } | |
2977 | str = temp; | |
1da177e4 LT |
2978 | } /* End while there is a string arg */ |
2979 | ||
f2cf8e25 AC |
2980 | if (last < 6) { |
2981 | printk(KERN_ERR "epca: Insufficient parms specified\n"); | |
1da177e4 LT |
2982 | return; |
2983 | } | |
2984 | ||
2985 | /* I should REALLY validate the stuff here */ | |
1da177e4 LT |
2986 | /* Copies our local copy of board into boards */ |
2987 | memcpy((void *)&boards[num_cards],(void *)&board, sizeof(board)); | |
1da177e4 | 2988 | /* Does this get called once per lilo arg are what ? */ |
1da177e4 LT |
2989 | printk(KERN_INFO "PC/Xx: Added board %i, %s %i ports at 0x%4.4X base 0x%6.6X\n", |
2990 | num_cards, board_desc[board.type], | |
2991 | board.numports, (int)board.port, (unsigned int) board.membase); | |
1da177e4 | 2992 | num_cards++; |
1da177e4 LT |
2993 | } /* End epca_setup */ |
2994 | ||
2995 | ||
1da177e4 LT |
2996 | /* ------------------------ Begin init_PCI --------------------------- */ |
2997 | ||
2998 | enum epic_board_types { | |
2999 | brd_xr = 0, | |
3000 | brd_xem, | |
3001 | brd_cx, | |
3002 | brd_xrj, | |
3003 | }; | |
3004 | ||
3005 | ||
3006 | /* indexed directly by epic_board_types enum */ | |
3007 | static struct { | |
3008 | unsigned char board_type; | |
3009 | unsigned bar_idx; /* PCI base address region */ | |
3010 | } epca_info_tbl[] = { | |
3011 | { PCIXR, 0, }, | |
3012 | { PCIXEM, 0, }, | |
3013 | { PCICX, 0, }, | |
3014 | { PCIXRJ, 2, }, | |
3015 | }; | |
3016 | ||
1da177e4 LT |
3017 | static int __devinit epca_init_one (struct pci_dev *pdev, |
3018 | const struct pci_device_id *ent) | |
3019 | { | |
3020 | static int board_num = -1; | |
3021 | int board_idx, info_idx = ent->driver_data; | |
3022 | unsigned long addr; | |
3023 | ||
3024 | if (pci_enable_device(pdev)) | |
3025 | return -EIO; | |
3026 | ||
3027 | board_num++; | |
3028 | board_idx = board_num + num_cards; | |
3029 | if (board_idx >= MAXBOARDS) | |
3030 | goto err_out; | |
3031 | ||
3032 | addr = pci_resource_start (pdev, epca_info_tbl[info_idx].bar_idx); | |
3033 | if (!addr) { | |
3034 | printk (KERN_ERR PFX "PCI region #%d not available (size 0)\n", | |
3035 | epca_info_tbl[info_idx].bar_idx); | |
3036 | goto err_out; | |
3037 | } | |
3038 | ||
3039 | boards[board_idx].status = ENABLED; | |
3040 | boards[board_idx].type = epca_info_tbl[info_idx].board_type; | |
3041 | boards[board_idx].numports = 0x0; | |
f2cf8e25 AC |
3042 | boards[board_idx].port = addr + PCI_IO_OFFSET; |
3043 | boards[board_idx].membase = addr; | |
1da177e4 LT |
3044 | |
3045 | if (!request_mem_region (addr + PCI_IO_OFFSET, 0x200000, "epca")) { | |
3046 | printk (KERN_ERR PFX "resource 0x%x @ 0x%lx unavailable\n", | |
3047 | 0x200000, addr + PCI_IO_OFFSET); | |
3048 | goto err_out; | |
3049 | } | |
3050 | ||
3051 | boards[board_idx].re_map_port = ioremap(addr + PCI_IO_OFFSET, 0x200000); | |
3052 | if (!boards[board_idx].re_map_port) { | |
3053 | printk (KERN_ERR PFX "cannot map 0x%x @ 0x%lx\n", | |
3054 | 0x200000, addr + PCI_IO_OFFSET); | |
3055 | goto err_out_free_pciio; | |
3056 | } | |
3057 | ||
3058 | if (!request_mem_region (addr, 0x200000, "epca")) { | |
3059 | printk (KERN_ERR PFX "resource 0x%x @ 0x%lx unavailable\n", | |
3060 | 0x200000, addr); | |
3061 | goto err_out_free_iounmap; | |
3062 | } | |
3063 | ||
3064 | boards[board_idx].re_map_membase = ioremap(addr, 0x200000); | |
3065 | if (!boards[board_idx].re_map_membase) { | |
3066 | printk (KERN_ERR PFX "cannot map 0x%x @ 0x%lx\n", | |
3067 | 0x200000, addr + PCI_IO_OFFSET); | |
3068 | goto err_out_free_memregion; | |
3069 | } | |
3070 | ||
3071 | /* -------------------------------------------------------------- | |
3072 | I don't know what the below does, but the hardware guys say | |
3073 | its required on everything except PLX (In this case XRJ). | |
3074 | ---------------------------------------------------------------- */ | |
3075 | if (info_idx != brd_xrj) { | |
3076 | pci_write_config_byte(pdev, 0x40, 0); | |
3077 | pci_write_config_byte(pdev, 0x46, 0); | |
3078 | } | |
3079 | ||
3080 | return 0; | |
3081 | ||
3082 | err_out_free_memregion: | |
3083 | release_mem_region (addr, 0x200000); | |
3084 | err_out_free_iounmap: | |
3085 | iounmap (boards[board_idx].re_map_port); | |
3086 | err_out_free_pciio: | |
3087 | release_mem_region (addr + PCI_IO_OFFSET, 0x200000); | |
3088 | err_out: | |
3089 | return -ENODEV; | |
3090 | } | |
3091 | ||
3092 | ||
3093 | static struct pci_device_id epca_pci_tbl[] = { | |
3094 | { PCI_VENDOR_DIGI, PCI_DEVICE_XR, PCI_ANY_ID, PCI_ANY_ID, 0, 0, brd_xr }, | |
3095 | { PCI_VENDOR_DIGI, PCI_DEVICE_XEM, PCI_ANY_ID, PCI_ANY_ID, 0, 0, brd_xem }, | |
3096 | { PCI_VENDOR_DIGI, PCI_DEVICE_CX, PCI_ANY_ID, PCI_ANY_ID, 0, 0, brd_cx }, | |
3097 | { PCI_VENDOR_DIGI, PCI_DEVICE_XRJ, PCI_ANY_ID, PCI_ANY_ID, 0, 0, brd_xrj }, | |
3098 | { 0, } | |
3099 | }; | |
3100 | ||
3101 | MODULE_DEVICE_TABLE(pci, epca_pci_tbl); | |
3102 | ||
3103 | int __init init_PCI (void) | |
f2cf8e25 | 3104 | { /* Begin init_PCI */ |
1da177e4 LT |
3105 | memset (&epca_driver, 0, sizeof (epca_driver)); |
3106 | epca_driver.name = "epca"; | |
3107 | epca_driver.id_table = epca_pci_tbl; | |
3108 | epca_driver.probe = epca_init_one; | |
3109 | ||
3110 | return pci_register_driver(&epca_driver); | |
f2cf8e25 | 3111 | } |
1da177e4 LT |
3112 | |
3113 | MODULE_LICENSE("GPL"); |