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 | ||
1da177e4 LT |
33 | #include <linux/module.h> |
34 | #include <linux/kernel.h> | |
35 | #include <linux/types.h> | |
36 | #include <linux/init.h> | |
37 | #include <linux/serial.h> | |
38 | #include <linux/delay.h> | |
39 | #include <linux/ctype.h> | |
40 | #include <linux/tty.h> | |
41 | #include <linux/tty_flip.h> | |
42 | #include <linux/slab.h> | |
43 | #include <linux/ioport.h> | |
44 | #include <linux/interrupt.h> | |
45 | #include <asm/uaccess.h> | |
46 | #include <asm/io.h> | |
f2cf8e25 | 47 | #include <linux/spinlock.h> |
1da177e4 LT |
48 | #include <linux/pci.h> |
49 | #include "digiPCI.h" | |
f2cf8e25 | 50 | |
1da177e4 LT |
51 | |
52 | #include "digi1.h" | |
53 | #include "digiFep1.h" | |
54 | #include "epca.h" | |
55 | #include "epcaconfig.h" | |
56 | ||
1da177e4 LT |
57 | /* ---------------------- Begin defines ------------------------ */ |
58 | ||
f2cf8e25 | 59 | #define VERSION "1.3.0.1-LK2.6" |
1da177e4 LT |
60 | |
61 | /* This major needs to be submitted to Linux to join the majors list */ | |
62 | ||
63 | #define DIGIINFOMAJOR 35 /* For Digi specific ioctl */ | |
64 | ||
65 | ||
66 | #define MAXCARDS 7 | |
67 | #define epcaassert(x, msg) if (!(x)) epca_error(__LINE__, msg) | |
68 | ||
69 | #define PFX "epca: " | |
70 | ||
71 | /* ----------------- Begin global definitions ------------------- */ | |
72 | ||
1da177e4 LT |
73 | static int nbdevs, num_cards, liloconfig; |
74 | static int digi_poller_inhibited = 1 ; | |
75 | ||
76 | static int setup_error_code; | |
77 | static int invalid_lilo_config; | |
78 | ||
f2cf8e25 AC |
79 | /* The ISA boards do window flipping into the same spaces so its only sane |
80 | with a single lock. It's still pretty efficient */ | |
81 | ||
34af946a | 82 | static DEFINE_SPINLOCK(epca_lock); |
f2cf8e25 | 83 | |
1da177e4 LT |
84 | /* ----------------------------------------------------------------------- |
85 | MAXBOARDS is typically 12, but ISA and EISA cards are restricted to | |
86 | 7 below. | |
87 | --------------------------------------------------------------------------*/ | |
88 | static struct board_info boards[MAXBOARDS]; | |
89 | ||
90 | ||
91 | /* ------------- Begin structures used for driver registeration ---------- */ | |
92 | ||
93 | static struct tty_driver *pc_driver; | |
94 | static struct tty_driver *pc_info; | |
95 | ||
96 | /* ------------------ Begin Digi specific structures -------------------- */ | |
97 | ||
98 | /* ------------------------------------------------------------------------ | |
99 | digi_channels represents an array of structures that keep track of | |
100 | each channel of the Digi product. Information such as transmit and | |
101 | receive pointers, termio data, and signal definitions (DTR, CTS, etc ...) | |
102 | are stored here. This structure is NOT used to overlay the cards | |
103 | physical channel structure. | |
104 | -------------------------------------------------------------------------- */ | |
105 | ||
106 | static struct channel digi_channels[MAX_ALLOC]; | |
107 | ||
108 | /* ------------------------------------------------------------------------ | |
109 | card_ptr is an array used to hold the address of the | |
110 | first channel structure of each card. This array will hold | |
111 | the addresses of various channels located in digi_channels. | |
112 | -------------------------------------------------------------------------- */ | |
113 | static struct channel *card_ptr[MAXCARDS]; | |
114 | ||
115 | static struct timer_list epca_timer; | |
116 | ||
117 | /* ---------------------- Begin function prototypes --------------------- */ | |
118 | ||
119 | /* ---------------------------------------------------------------------- | |
120 | Begin generic memory functions. These functions will be alias | |
121 | (point at) more specific functions dependent on the board being | |
122 | configured. | |
123 | ----------------------------------------------------------------------- */ | |
124 | ||
f2cf8e25 AC |
125 | static void memwinon(struct board_info *b, unsigned int win); |
126 | static void memwinoff(struct board_info *b, unsigned int win); | |
127 | static void globalwinon(struct channel *ch); | |
128 | static void rxwinon(struct channel *ch); | |
129 | static void txwinon(struct channel *ch); | |
130 | static void memoff(struct channel *ch); | |
131 | static void assertgwinon(struct channel *ch); | |
132 | static void assertmemoff(struct channel *ch); | |
1da177e4 LT |
133 | |
134 | /* ---- Begin more 'specific' memory functions for cx_like products --- */ | |
135 | ||
f2cf8e25 AC |
136 | static void pcxem_memwinon(struct board_info *b, unsigned int win); |
137 | static void pcxem_memwinoff(struct board_info *b, unsigned int win); | |
138 | static void pcxem_globalwinon(struct channel *ch); | |
139 | static void pcxem_rxwinon(struct channel *ch); | |
140 | static void pcxem_txwinon(struct channel *ch); | |
141 | static void pcxem_memoff(struct channel *ch); | |
1da177e4 LT |
142 | |
143 | /* ------ Begin more 'specific' memory functions for the pcxe ------- */ | |
144 | ||
f2cf8e25 AC |
145 | static void pcxe_memwinon(struct board_info *b, unsigned int win); |
146 | static void pcxe_memwinoff(struct board_info *b, unsigned int win); | |
147 | static void pcxe_globalwinon(struct channel *ch); | |
148 | static void pcxe_rxwinon(struct channel *ch); | |
149 | static void pcxe_txwinon(struct channel *ch); | |
150 | static void pcxe_memoff(struct channel *ch); | |
1da177e4 LT |
151 | |
152 | /* ---- Begin more 'specific' memory functions for the pc64xe and pcxi ---- */ | |
153 | /* Note : pc64xe and pcxi share the same windowing routines */ | |
154 | ||
f2cf8e25 AC |
155 | static void pcxi_memwinon(struct board_info *b, unsigned int win); |
156 | static void pcxi_memwinoff(struct board_info *b, unsigned int win); | |
157 | static void pcxi_globalwinon(struct channel *ch); | |
158 | static void pcxi_rxwinon(struct channel *ch); | |
159 | static void pcxi_txwinon(struct channel *ch); | |
160 | static void pcxi_memoff(struct channel *ch); | |
1da177e4 LT |
161 | |
162 | /* - Begin 'specific' do nothing memory functions needed for some cards - */ | |
163 | ||
f2cf8e25 AC |
164 | static void dummy_memwinon(struct board_info *b, unsigned int win); |
165 | static void dummy_memwinoff(struct board_info *b, unsigned int win); | |
166 | static void dummy_globalwinon(struct channel *ch); | |
167 | static void dummy_rxwinon(struct channel *ch); | |
168 | static void dummy_txwinon(struct channel *ch); | |
169 | static void dummy_memoff(struct channel *ch); | |
170 | static void dummy_assertgwinon(struct channel *ch); | |
171 | static void dummy_assertmemoff(struct channel *ch); | |
1da177e4 LT |
172 | |
173 | /* ------------------- Begin declare functions ----------------------- */ | |
174 | ||
f2cf8e25 AC |
175 | static struct channel *verifyChannel(struct tty_struct *); |
176 | static void pc_sched_event(struct channel *, int); | |
1da177e4 LT |
177 | static void epca_error(int, char *); |
178 | static void pc_close(struct tty_struct *, struct file *); | |
179 | static void shutdown(struct channel *); | |
180 | static void pc_hangup(struct tty_struct *); | |
181 | static void pc_put_char(struct tty_struct *, unsigned char); | |
182 | static int pc_write_room(struct tty_struct *); | |
183 | static int pc_chars_in_buffer(struct tty_struct *); | |
184 | static void pc_flush_buffer(struct tty_struct *); | |
185 | static void pc_flush_chars(struct tty_struct *); | |
186 | static int block_til_ready(struct tty_struct *, struct file *, | |
187 | struct channel *); | |
188 | static int pc_open(struct tty_struct *, struct file *); | |
189 | static void post_fep_init(unsigned int crd); | |
190 | static void epcapoll(unsigned long); | |
191 | static void doevent(int); | |
192 | static void fepcmd(struct channel *, int, int, int, int, int); | |
193 | static unsigned termios2digi_h(struct channel *ch, unsigned); | |
194 | static unsigned termios2digi_i(struct channel *ch, unsigned); | |
195 | static unsigned termios2digi_c(struct channel *ch, unsigned); | |
196 | static void epcaparam(struct tty_struct *, struct channel *); | |
197 | static void receive_data(struct channel *); | |
198 | static int pc_ioctl(struct tty_struct *, struct file *, | |
199 | unsigned int, unsigned long); | |
200 | static int info_ioctl(struct tty_struct *, struct file *, | |
201 | unsigned int, unsigned long); | |
606d099c | 202 | static void pc_set_termios(struct tty_struct *, struct ktermios *); |
c4028958 | 203 | static void do_softint(struct work_struct *work); |
1da177e4 LT |
204 | static void pc_stop(struct tty_struct *); |
205 | static void pc_start(struct tty_struct *); | |
206 | static void pc_throttle(struct tty_struct * tty); | |
207 | static void pc_unthrottle(struct tty_struct *tty); | |
208 | static void digi_send_break(struct channel *ch, int msec); | |
209 | static void setup_empty_event(struct tty_struct *tty, struct channel *ch); | |
210 | void epca_setup(char *, int *); | |
1da177e4 | 211 | |
1da177e4 | 212 | static int pc_write(struct tty_struct *, const unsigned char *, int); |
f2cf8e25 | 213 | static int pc_init(void); |
1da177e4 | 214 | static int init_PCI(void); |
1da177e4 LT |
215 | |
216 | ||
217 | /* ------------------------------------------------------------------ | |
218 | Table of functions for each board to handle memory. Mantaining | |
219 | parallelism is a *very* good idea here. The idea is for the | |
220 | runtime code to blindly call these functions, not knowing/caring | |
221 | about the underlying hardware. This stuff should contain no | |
222 | conditionals; if more functionality is needed a different entry | |
223 | should be established. These calls are the interface calls and | |
224 | are the only functions that should be accessed. Anyone caught | |
225 | making direct calls deserves what they get. | |
226 | -------------------------------------------------------------------- */ | |
227 | ||
f2cf8e25 | 228 | static void memwinon(struct board_info *b, unsigned int win) |
1da177e4 LT |
229 | { |
230 | (b->memwinon)(b, win); | |
231 | } | |
232 | ||
f2cf8e25 | 233 | static void memwinoff(struct board_info *b, unsigned int win) |
1da177e4 LT |
234 | { |
235 | (b->memwinoff)(b, win); | |
236 | } | |
237 | ||
f2cf8e25 | 238 | static void globalwinon(struct channel *ch) |
1da177e4 LT |
239 | { |
240 | (ch->board->globalwinon)(ch); | |
241 | } | |
242 | ||
f2cf8e25 | 243 | static void rxwinon(struct channel *ch) |
1da177e4 LT |
244 | { |
245 | (ch->board->rxwinon)(ch); | |
246 | } | |
247 | ||
f2cf8e25 | 248 | static void txwinon(struct channel *ch) |
1da177e4 LT |
249 | { |
250 | (ch->board->txwinon)(ch); | |
251 | } | |
252 | ||
f2cf8e25 | 253 | static void memoff(struct channel *ch) |
1da177e4 LT |
254 | { |
255 | (ch->board->memoff)(ch); | |
256 | } | |
f2cf8e25 | 257 | static void assertgwinon(struct channel *ch) |
1da177e4 LT |
258 | { |
259 | (ch->board->assertgwinon)(ch); | |
260 | } | |
261 | ||
f2cf8e25 | 262 | static void assertmemoff(struct channel *ch) |
1da177e4 LT |
263 | { |
264 | (ch->board->assertmemoff)(ch); | |
265 | } | |
266 | ||
267 | /* --------------------------------------------------------- | |
268 | PCXEM windowing is the same as that used in the PCXR | |
269 | and CX series cards. | |
270 | ------------------------------------------------------------ */ | |
271 | ||
f2cf8e25 | 272 | static void pcxem_memwinon(struct board_info *b, unsigned int win) |
1da177e4 | 273 | { |
f2cf8e25 | 274 | outb_p(FEPWIN|win, b->port + 1); |
1da177e4 LT |
275 | } |
276 | ||
f2cf8e25 | 277 | static void pcxem_memwinoff(struct board_info *b, unsigned int win) |
1da177e4 | 278 | { |
f2cf8e25 | 279 | outb_p(0, b->port + 1); |
1da177e4 LT |
280 | } |
281 | ||
f2cf8e25 | 282 | static void pcxem_globalwinon(struct channel *ch) |
1da177e4 LT |
283 | { |
284 | outb_p( FEPWIN, (int)ch->board->port + 1); | |
285 | } | |
286 | ||
f2cf8e25 | 287 | static void pcxem_rxwinon(struct channel *ch) |
1da177e4 LT |
288 | { |
289 | outb_p(ch->rxwin, (int)ch->board->port + 1); | |
290 | } | |
291 | ||
f2cf8e25 | 292 | static void pcxem_txwinon(struct channel *ch) |
1da177e4 LT |
293 | { |
294 | outb_p(ch->txwin, (int)ch->board->port + 1); | |
295 | } | |
296 | ||
f2cf8e25 | 297 | static void pcxem_memoff(struct channel *ch) |
1da177e4 LT |
298 | { |
299 | outb_p(0, (int)ch->board->port + 1); | |
300 | } | |
301 | ||
302 | /* ----------------- Begin pcxe memory window stuff ------------------ */ | |
303 | ||
f2cf8e25 | 304 | static void pcxe_memwinon(struct board_info *b, unsigned int win) |
1da177e4 | 305 | { |
f2cf8e25 | 306 | outb_p(FEPWIN | win, b->port + 1); |
1da177e4 LT |
307 | } |
308 | ||
f2cf8e25 | 309 | static void pcxe_memwinoff(struct board_info *b, unsigned int win) |
1da177e4 | 310 | { |
f2cf8e25 AC |
311 | outb_p(inb(b->port) & ~FEPMEM, |
312 | b->port + 1); | |
313 | outb_p(0, b->port + 1); | |
1da177e4 LT |
314 | } |
315 | ||
f2cf8e25 | 316 | static void pcxe_globalwinon(struct channel *ch) |
1da177e4 LT |
317 | { |
318 | outb_p( FEPWIN, (int)ch->board->port + 1); | |
319 | } | |
320 | ||
f2cf8e25 | 321 | static void pcxe_rxwinon(struct channel *ch) |
1da177e4 LT |
322 | { |
323 | outb_p(ch->rxwin, (int)ch->board->port + 1); | |
324 | } | |
325 | ||
f2cf8e25 | 326 | static void pcxe_txwinon(struct channel *ch) |
1da177e4 LT |
327 | { |
328 | outb_p(ch->txwin, (int)ch->board->port + 1); | |
329 | } | |
330 | ||
f2cf8e25 | 331 | static void pcxe_memoff(struct channel *ch) |
1da177e4 LT |
332 | { |
333 | outb_p(0, (int)ch->board->port); | |
334 | outb_p(0, (int)ch->board->port + 1); | |
335 | } | |
336 | ||
337 | /* ------------- Begin pc64xe and pcxi memory window stuff -------------- */ | |
338 | ||
f2cf8e25 | 339 | static void pcxi_memwinon(struct board_info *b, unsigned int win) |
1da177e4 | 340 | { |
f2cf8e25 | 341 | outb_p(inb(b->port) | FEPMEM, b->port); |
1da177e4 LT |
342 | } |
343 | ||
f2cf8e25 | 344 | static void pcxi_memwinoff(struct board_info *b, unsigned int win) |
1da177e4 | 345 | { |
f2cf8e25 | 346 | outb_p(inb(b->port) & ~FEPMEM, b->port); |
1da177e4 LT |
347 | } |
348 | ||
f2cf8e25 | 349 | static void pcxi_globalwinon(struct channel *ch) |
1da177e4 | 350 | { |
f2cf8e25 | 351 | outb_p(FEPMEM, ch->board->port); |
1da177e4 LT |
352 | } |
353 | ||
f2cf8e25 | 354 | static void pcxi_rxwinon(struct channel *ch) |
1da177e4 | 355 | { |
f2cf8e25 | 356 | outb_p(FEPMEM, ch->board->port); |
1da177e4 LT |
357 | } |
358 | ||
f2cf8e25 | 359 | static void pcxi_txwinon(struct channel *ch) |
1da177e4 | 360 | { |
f2cf8e25 | 361 | outb_p(FEPMEM, ch->board->port); |
1da177e4 LT |
362 | } |
363 | ||
f2cf8e25 | 364 | static void pcxi_memoff(struct channel *ch) |
1da177e4 | 365 | { |
f2cf8e25 | 366 | outb_p(0, ch->board->port); |
1da177e4 LT |
367 | } |
368 | ||
f2cf8e25 | 369 | static void pcxi_assertgwinon(struct channel *ch) |
1da177e4 | 370 | { |
f2cf8e25 | 371 | epcaassert(inb(ch->board->port) & FEPMEM, "Global memory off"); |
1da177e4 LT |
372 | } |
373 | ||
f2cf8e25 | 374 | static void pcxi_assertmemoff(struct channel *ch) |
1da177e4 | 375 | { |
f2cf8e25 | 376 | epcaassert(!(inb(ch->board->port) & FEPMEM), "Memory on"); |
1da177e4 LT |
377 | } |
378 | ||
379 | ||
380 | /* ---------------------------------------------------------------------- | |
381 | Not all of the cards need specific memory windowing routines. Some | |
382 | cards (Such as PCI) needs no windowing routines at all. We provide | |
383 | these do nothing routines so that the same code base can be used. | |
384 | The driver will ALWAYS call a windowing routine if it thinks it needs | |
385 | to; regardless of the card. However, dependent on the card the routine | |
386 | may or may not do anything. | |
387 | ---------------------------------------------------------------------------*/ | |
388 | ||
f2cf8e25 | 389 | static void dummy_memwinon(struct board_info *b, unsigned int win) |
1da177e4 LT |
390 | { |
391 | } | |
392 | ||
f2cf8e25 | 393 | static void dummy_memwinoff(struct board_info *b, unsigned int win) |
1da177e4 LT |
394 | { |
395 | } | |
396 | ||
f2cf8e25 | 397 | static void dummy_globalwinon(struct channel *ch) |
1da177e4 LT |
398 | { |
399 | } | |
400 | ||
f2cf8e25 | 401 | static void dummy_rxwinon(struct channel *ch) |
1da177e4 LT |
402 | { |
403 | } | |
404 | ||
f2cf8e25 | 405 | static void dummy_txwinon(struct channel *ch) |
1da177e4 LT |
406 | { |
407 | } | |
408 | ||
f2cf8e25 | 409 | static void dummy_memoff(struct channel *ch) |
1da177e4 LT |
410 | { |
411 | } | |
412 | ||
f2cf8e25 | 413 | static void dummy_assertgwinon(struct channel *ch) |
1da177e4 LT |
414 | { |
415 | } | |
416 | ||
f2cf8e25 | 417 | static void dummy_assertmemoff(struct channel *ch) |
1da177e4 LT |
418 | { |
419 | } | |
420 | ||
421 | /* ----------------- Begin verifyChannel function ----------------------- */ | |
f2cf8e25 | 422 | static struct channel *verifyChannel(struct tty_struct *tty) |
1da177e4 | 423 | { /* Begin verifyChannel */ |
1da177e4 LT |
424 | /* -------------------------------------------------------------------- |
425 | This routine basically provides a sanity check. It insures that | |
426 | the channel returned is within the proper range of addresses as | |
427 | well as properly initialized. If some bogus info gets passed in | |
428 | through tty->driver_data this should catch it. | |
f2cf8e25 AC |
429 | --------------------------------------------------------------------- */ |
430 | if (tty) { | |
431 | struct channel *ch = (struct channel *)tty->driver_data; | |
432 | if ((ch >= &digi_channels[0]) && (ch < &digi_channels[nbdevs])) { | |
1da177e4 LT |
433 | if (ch->magic == EPCA_MAGIC) |
434 | return ch; | |
435 | } | |
f2cf8e25 | 436 | } |
1da177e4 LT |
437 | return NULL; |
438 | ||
439 | } /* End verifyChannel */ | |
440 | ||
441 | /* ------------------ Begin pc_sched_event ------------------------- */ | |
442 | ||
f2cf8e25 AC |
443 | static void pc_sched_event(struct channel *ch, int event) |
444 | { | |
1da177e4 LT |
445 | /* ---------------------------------------------------------------------- |
446 | We call this to schedule interrupt processing on some event. The | |
447 | kernel sees our request and calls the related routine in OUR driver. | |
448 | -------------------------------------------------------------------------*/ | |
1da177e4 LT |
449 | ch->event |= 1 << event; |
450 | schedule_work(&ch->tqueue); | |
1da177e4 LT |
451 | } /* End pc_sched_event */ |
452 | ||
453 | /* ------------------ Begin epca_error ------------------------- */ | |
454 | ||
455 | static void epca_error(int line, char *msg) | |
f2cf8e25 | 456 | { |
1da177e4 | 457 | printk(KERN_ERR "epca_error (Digi): line = %d %s\n",line,msg); |
f2cf8e25 | 458 | } |
1da177e4 LT |
459 | |
460 | /* ------------------ Begin pc_close ------------------------- */ | |
461 | static void pc_close(struct tty_struct * tty, struct file * filp) | |
f2cf8e25 | 462 | { |
1da177e4 LT |
463 | struct channel *ch; |
464 | unsigned long flags; | |
1da177e4 LT |
465 | /* --------------------------------------------------------- |
466 | verifyChannel returns the channel from the tty struct | |
467 | if it is valid. This serves as a sanity check. | |
468 | ------------------------------------------------------------- */ | |
f2cf8e25 AC |
469 | if ((ch = verifyChannel(tty)) != NULL) { /* Begin if ch != NULL */ |
470 | spin_lock_irqsave(&epca_lock, flags); | |
471 | if (tty_hung_up_p(filp)) { | |
472 | spin_unlock_irqrestore(&epca_lock, flags); | |
1da177e4 LT |
473 | return; |
474 | } | |
1da177e4 | 475 | /* Check to see if the channel is open more than once */ |
f2cf8e25 AC |
476 | if (ch->count-- > 1) { |
477 | /* Begin channel is open more than once */ | |
1da177e4 LT |
478 | /* ------------------------------------------------------------- |
479 | Return without doing anything. Someone might still be using | |
480 | the channel. | |
481 | ---------------------------------------------------------------- */ | |
f2cf8e25 | 482 | spin_unlock_irqrestore(&epca_lock, flags); |
1da177e4 LT |
483 | return; |
484 | } /* End channel is open more than once */ | |
485 | ||
486 | /* Port open only once go ahead with shutdown & reset */ | |
56ee4827 | 487 | BUG_ON(ch->count < 0); |
1da177e4 LT |
488 | |
489 | /* --------------------------------------------------------------- | |
490 | Let the rest of the driver know the channel is being closed. | |
491 | This becomes important if an open is attempted before close | |
492 | is finished. | |
493 | ------------------------------------------------------------------ */ | |
1da177e4 | 494 | ch->asyncflags |= ASYNC_CLOSING; |
1da177e4 LT |
495 | tty->closing = 1; |
496 | ||
f2cf8e25 AC |
497 | spin_unlock_irqrestore(&epca_lock, flags); |
498 | ||
499 | if (ch->asyncflags & ASYNC_INITIALIZED) { | |
1da177e4 LT |
500 | /* Setup an event to indicate when the transmit buffer empties */ |
501 | setup_empty_event(tty, ch); | |
502 | tty_wait_until_sent(tty, 3000); /* 30 seconds timeout */ | |
503 | } | |
1da177e4 LT |
504 | if (tty->driver->flush_buffer) |
505 | tty->driver->flush_buffer(tty); | |
506 | ||
507 | tty_ldisc_flush(tty); | |
508 | shutdown(ch); | |
f2cf8e25 AC |
509 | |
510 | spin_lock_irqsave(&epca_lock, flags); | |
1da177e4 LT |
511 | tty->closing = 0; |
512 | ch->event = 0; | |
513 | ch->tty = NULL; | |
f2cf8e25 | 514 | spin_unlock_irqrestore(&epca_lock, flags); |
1da177e4 | 515 | |
f2cf8e25 | 516 | if (ch->blocked_open) { /* Begin if blocked_open */ |
1da177e4 | 517 | if (ch->close_delay) |
1da177e4 | 518 | msleep_interruptible(jiffies_to_msecs(ch->close_delay)); |
1da177e4 | 519 | wake_up_interruptible(&ch->open_wait); |
1da177e4 | 520 | } /* End if blocked_open */ |
1da177e4 LT |
521 | ch->asyncflags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_INITIALIZED | |
522 | ASYNC_CLOSING); | |
523 | wake_up_interruptible(&ch->close_wait); | |
1da177e4 | 524 | } /* End if ch != NULL */ |
1da177e4 LT |
525 | } /* End pc_close */ |
526 | ||
527 | /* ------------------ Begin shutdown ------------------------- */ | |
528 | ||
529 | static void shutdown(struct channel *ch) | |
530 | { /* Begin shutdown */ | |
531 | ||
532 | unsigned long flags; | |
533 | struct tty_struct *tty; | |
bc9a5154 | 534 | struct board_chan __iomem *bc; |
1da177e4 LT |
535 | |
536 | if (!(ch->asyncflags & ASYNC_INITIALIZED)) | |
537 | return; | |
538 | ||
f2cf8e25 | 539 | spin_lock_irqsave(&epca_lock, flags); |
1da177e4 | 540 | |
f2cf8e25 | 541 | globalwinon(ch); |
1da177e4 LT |
542 | bc = ch->brdchan; |
543 | ||
544 | /* ------------------------------------------------------------------ | |
545 | In order for an event to be generated on the receipt of data the | |
546 | idata flag must be set. Since we are shutting down, this is not | |
547 | necessary clear this flag. | |
548 | --------------------------------------------------------------------- */ | |
549 | ||
550 | if (bc) | |
f2cf8e25 | 551 | writeb(0, &bc->idata); |
1da177e4 LT |
552 | tty = ch->tty; |
553 | ||
554 | /* ---------------------------------------------------------------- | |
555 | If we're a modem control device and HUPCL is on, drop RTS & DTR. | |
556 | ------------------------------------------------------------------ */ | |
557 | ||
f2cf8e25 | 558 | if (tty->termios->c_cflag & HUPCL) { |
1da177e4 LT |
559 | ch->omodem &= ~(ch->m_rts | ch->m_dtr); |
560 | fepcmd(ch, SETMODEM, 0, ch->m_dtr | ch->m_rts, 10, 1); | |
561 | } | |
1da177e4 LT |
562 | memoff(ch); |
563 | ||
564 | /* ------------------------------------------------------------------ | |
565 | The channel has officialy been closed. The next time it is opened | |
566 | it will have to reinitialized. Set a flag to indicate this. | |
567 | ---------------------------------------------------------------------- */ | |
568 | ||
569 | /* Prevent future Digi programmed interrupts from coming active */ | |
570 | ||
571 | ch->asyncflags &= ~ASYNC_INITIALIZED; | |
f2cf8e25 | 572 | spin_unlock_irqrestore(&epca_lock, flags); |
1da177e4 LT |
573 | |
574 | } /* End shutdown */ | |
575 | ||
576 | /* ------------------ Begin pc_hangup ------------------------- */ | |
577 | ||
578 | static void pc_hangup(struct tty_struct *tty) | |
579 | { /* Begin pc_hangup */ | |
1da177e4 LT |
580 | struct channel *ch; |
581 | ||
582 | /* --------------------------------------------------------- | |
583 | verifyChannel returns the channel from the tty struct | |
584 | if it is valid. This serves as a sanity check. | |
585 | ------------------------------------------------------------- */ | |
586 | ||
f2cf8e25 | 587 | if ((ch = verifyChannel(tty)) != NULL) { /* Begin if ch != NULL */ |
1da177e4 LT |
588 | unsigned long flags; |
589 | ||
1da177e4 LT |
590 | if (tty->driver->flush_buffer) |
591 | tty->driver->flush_buffer(tty); | |
592 | tty_ldisc_flush(tty); | |
593 | shutdown(ch); | |
594 | ||
f2cf8e25 | 595 | spin_lock_irqsave(&epca_lock, flags); |
1da177e4 LT |
596 | ch->tty = NULL; |
597 | ch->event = 0; | |
598 | ch->count = 0; | |
1da177e4 | 599 | ch->asyncflags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_INITIALIZED); |
f2cf8e25 | 600 | spin_unlock_irqrestore(&epca_lock, flags); |
1da177e4 | 601 | wake_up_interruptible(&ch->open_wait); |
1da177e4 LT |
602 | } /* End if ch != NULL */ |
603 | ||
604 | } /* End pc_hangup */ | |
605 | ||
606 | /* ------------------ Begin pc_write ------------------------- */ | |
607 | ||
608 | static int pc_write(struct tty_struct * tty, | |
609 | const unsigned char *buf, int bytesAvailable) | |
610 | { /* Begin pc_write */ | |
f2cf8e25 AC |
611 | unsigned int head, tail; |
612 | int dataLen; | |
613 | int size; | |
614 | int amountCopied; | |
1da177e4 LT |
615 | struct channel *ch; |
616 | unsigned long flags; | |
617 | int remain; | |
bc9a5154 | 618 | struct board_chan __iomem *bc; |
1da177e4 LT |
619 | |
620 | /* ---------------------------------------------------------------- | |
621 | pc_write is primarily called directly by the kernel routine | |
622 | tty_write (Though it can also be called by put_char) found in | |
623 | tty_io.c. pc_write is passed a line discipline buffer where | |
624 | the data to be written out is stored. The line discipline | |
625 | implementation itself is done at the kernel level and is not | |
626 | brought into the driver. | |
627 | ------------------------------------------------------------------- */ | |
628 | ||
629 | /* --------------------------------------------------------- | |
630 | verifyChannel returns the channel from the tty struct | |
631 | if it is valid. This serves as a sanity check. | |
632 | ------------------------------------------------------------- */ | |
633 | ||
634 | if ((ch = verifyChannel(tty)) == NULL) | |
635 | return 0; | |
636 | ||
637 | /* Make a pointer to the channel data structure found on the board. */ | |
638 | ||
639 | bc = ch->brdchan; | |
640 | size = ch->txbufsize; | |
1da177e4 | 641 | amountCopied = 0; |
1da177e4 | 642 | |
f2cf8e25 | 643 | spin_lock_irqsave(&epca_lock, flags); |
1da177e4 LT |
644 | globalwinon(ch); |
645 | ||
f2cf8e25 AC |
646 | head = readw(&bc->tin) & (size - 1); |
647 | tail = readw(&bc->tout); | |
1da177e4 | 648 | |
f2cf8e25 AC |
649 | if (tail != readw(&bc->tout)) |
650 | tail = readw(&bc->tout); | |
1da177e4 LT |
651 | tail &= (size - 1); |
652 | ||
653 | /* If head >= tail, head has not wrapped around. */ | |
f2cf8e25 | 654 | if (head >= tail) { /* Begin head has not wrapped */ |
1da177e4 LT |
655 | /* --------------------------------------------------------------- |
656 | remain (much like dataLen above) represents the total amount of | |
657 | space available on the card for data. Here dataLen represents | |
658 | the space existing between the head pointer and the end of | |
659 | buffer. This is important because a memcpy cannot be told to | |
660 | automatically wrap around when it hits the buffer end. | |
661 | ------------------------------------------------------------------ */ | |
1da177e4 LT |
662 | dataLen = size - head; |
663 | remain = size - (head - tail) - 1; | |
f2cf8e25 | 664 | } else { /* Begin head has wrapped around */ |
1da177e4 LT |
665 | |
666 | remain = tail - head - 1; | |
667 | dataLen = remain; | |
668 | ||
669 | } /* End head has wrapped around */ | |
1da177e4 LT |
670 | /* ------------------------------------------------------------------- |
671 | Check the space on the card. If we have more data than | |
672 | space; reduce the amount of data to fit the space. | |
673 | ---------------------------------------------------------------------- */ | |
1da177e4 | 674 | bytesAvailable = min(remain, bytesAvailable); |
1da177e4 LT |
675 | txwinon(ch); |
676 | while (bytesAvailable > 0) | |
677 | { /* Begin while there is data to copy onto card */ | |
678 | ||
679 | /* ----------------------------------------------------------------- | |
680 | If head is not wrapped, the below will make sure the first | |
681 | data copy fills to the end of card buffer. | |
682 | ------------------------------------------------------------------- */ | |
683 | ||
684 | dataLen = min(bytesAvailable, dataLen); | |
bc9a5154 | 685 | memcpy_toio(ch->txptr + head, buf, dataLen); |
1da177e4 LT |
686 | buf += dataLen; |
687 | head += dataLen; | |
688 | amountCopied += dataLen; | |
689 | bytesAvailable -= dataLen; | |
690 | ||
f2cf8e25 | 691 | if (head >= size) { |
1da177e4 LT |
692 | head = 0; |
693 | dataLen = tail; | |
694 | } | |
1da177e4 | 695 | } /* End while there is data to copy onto card */ |
1da177e4 LT |
696 | ch->statusflags |= TXBUSY; |
697 | globalwinon(ch); | |
f2cf8e25 | 698 | writew(head, &bc->tin); |
1da177e4 | 699 | |
f2cf8e25 | 700 | if ((ch->statusflags & LOWWAIT) == 0) { |
1da177e4 | 701 | ch->statusflags |= LOWWAIT; |
f2cf8e25 | 702 | writeb(1, &bc->ilow); |
1da177e4 LT |
703 | } |
704 | memoff(ch); | |
f2cf8e25 | 705 | spin_unlock_irqrestore(&epca_lock, flags); |
1da177e4 LT |
706 | return(amountCopied); |
707 | ||
708 | } /* End pc_write */ | |
709 | ||
710 | /* ------------------ Begin pc_put_char ------------------------- */ | |
711 | ||
712 | static void pc_put_char(struct tty_struct *tty, unsigned char c) | |
713 | { /* Begin pc_put_char */ | |
1da177e4 | 714 | pc_write(tty, &c, 1); |
1da177e4 LT |
715 | } /* End pc_put_char */ |
716 | ||
717 | /* ------------------ Begin pc_write_room ------------------------- */ | |
718 | ||
719 | static int pc_write_room(struct tty_struct *tty) | |
720 | { /* Begin pc_write_room */ | |
721 | ||
722 | int remain; | |
723 | struct channel *ch; | |
724 | unsigned long flags; | |
725 | unsigned int head, tail; | |
bc9a5154 | 726 | struct board_chan __iomem *bc; |
1da177e4 LT |
727 | |
728 | remain = 0; | |
729 | ||
730 | /* --------------------------------------------------------- | |
731 | verifyChannel returns the channel from the tty struct | |
732 | if it is valid. This serves as a sanity check. | |
733 | ------------------------------------------------------------- */ | |
734 | ||
f2cf8e25 AC |
735 | if ((ch = verifyChannel(tty)) != NULL) { |
736 | spin_lock_irqsave(&epca_lock, flags); | |
1da177e4 LT |
737 | globalwinon(ch); |
738 | ||
739 | bc = ch->brdchan; | |
f2cf8e25 AC |
740 | head = readw(&bc->tin) & (ch->txbufsize - 1); |
741 | tail = readw(&bc->tout); | |
1da177e4 | 742 | |
f2cf8e25 AC |
743 | if (tail != readw(&bc->tout)) |
744 | tail = readw(&bc->tout); | |
1da177e4 LT |
745 | /* Wrap tail if necessary */ |
746 | tail &= (ch->txbufsize - 1); | |
747 | ||
748 | if ((remain = tail - head - 1) < 0 ) | |
749 | remain += ch->txbufsize; | |
750 | ||
f2cf8e25 | 751 | if (remain && (ch->statusflags & LOWWAIT) == 0) { |
1da177e4 | 752 | ch->statusflags |= LOWWAIT; |
f2cf8e25 | 753 | writeb(1, &bc->ilow); |
1da177e4 LT |
754 | } |
755 | memoff(ch); | |
f2cf8e25 | 756 | spin_unlock_irqrestore(&epca_lock, flags); |
1da177e4 | 757 | } |
1da177e4 LT |
758 | /* Return how much room is left on card */ |
759 | return remain; | |
760 | ||
761 | } /* End pc_write_room */ | |
762 | ||
763 | /* ------------------ Begin pc_chars_in_buffer ---------------------- */ | |
764 | ||
765 | static int pc_chars_in_buffer(struct tty_struct *tty) | |
766 | { /* Begin pc_chars_in_buffer */ | |
767 | ||
768 | int chars; | |
769 | unsigned int ctail, head, tail; | |
770 | int remain; | |
771 | unsigned long flags; | |
772 | struct channel *ch; | |
bc9a5154 | 773 | struct board_chan __iomem *bc; |
1da177e4 LT |
774 | |
775 | /* --------------------------------------------------------- | |
776 | verifyChannel returns the channel from the tty struct | |
777 | if it is valid. This serves as a sanity check. | |
778 | ------------------------------------------------------------- */ | |
779 | ||
780 | if ((ch = verifyChannel(tty)) == NULL) | |
781 | return(0); | |
782 | ||
f2cf8e25 | 783 | spin_lock_irqsave(&epca_lock, flags); |
1da177e4 LT |
784 | globalwinon(ch); |
785 | ||
786 | bc = ch->brdchan; | |
f2cf8e25 AC |
787 | tail = readw(&bc->tout); |
788 | head = readw(&bc->tin); | |
789 | ctail = readw(&ch->mailbox->cout); | |
1da177e4 | 790 | |
f2cf8e25 | 791 | if (tail == head && readw(&ch->mailbox->cin) == ctail && readb(&bc->tbusy) == 0) |
1da177e4 | 792 | chars = 0; |
f2cf8e25 AC |
793 | else { /* Begin if some space on the card has been used */ |
794 | head = readw(&bc->tin) & (ch->txbufsize - 1); | |
1da177e4 | 795 | tail &= (ch->txbufsize - 1); |
1da177e4 LT |
796 | /* -------------------------------------------------------------- |
797 | The logic here is basically opposite of the above pc_write_room | |
798 | here we are finding the amount of bytes in the buffer filled. | |
799 | Not the amount of bytes empty. | |
800 | ------------------------------------------------------------------- */ | |
1da177e4 LT |
801 | if ((remain = tail - head - 1) < 0 ) |
802 | remain += ch->txbufsize; | |
1da177e4 | 803 | chars = (int)(ch->txbufsize - remain); |
1da177e4 LT |
804 | /* ------------------------------------------------------------- |
805 | Make it possible to wakeup anything waiting for output | |
806 | in tty_ioctl.c, etc. | |
807 | ||
808 | If not already set. Setup an event to indicate when the | |
809 | transmit buffer empties | |
810 | ----------------------------------------------------------------- */ | |
1da177e4 LT |
811 | if (!(ch->statusflags & EMPTYWAIT)) |
812 | setup_empty_event(tty,ch); | |
813 | ||
814 | } /* End if some space on the card has been used */ | |
1da177e4 | 815 | memoff(ch); |
f2cf8e25 | 816 | spin_unlock_irqrestore(&epca_lock, flags); |
1da177e4 LT |
817 | /* Return number of characters residing on card. */ |
818 | return(chars); | |
819 | ||
820 | } /* End pc_chars_in_buffer */ | |
821 | ||
822 | /* ------------------ Begin pc_flush_buffer ---------------------- */ | |
823 | ||
824 | static void pc_flush_buffer(struct tty_struct *tty) | |
825 | { /* Begin pc_flush_buffer */ | |
826 | ||
827 | unsigned int tail; | |
828 | unsigned long flags; | |
829 | struct channel *ch; | |
bc9a5154 | 830 | struct board_chan __iomem *bc; |
1da177e4 LT |
831 | /* --------------------------------------------------------- |
832 | verifyChannel returns the channel from the tty struct | |
833 | if it is valid. This serves as a sanity check. | |
834 | ------------------------------------------------------------- */ | |
1da177e4 LT |
835 | if ((ch = verifyChannel(tty)) == NULL) |
836 | return; | |
837 | ||
f2cf8e25 | 838 | spin_lock_irqsave(&epca_lock, flags); |
1da177e4 | 839 | globalwinon(ch); |
1da177e4 | 840 | bc = ch->brdchan; |
f2cf8e25 | 841 | tail = readw(&bc->tout); |
1da177e4 | 842 | /* Have FEP move tout pointer; effectively flushing transmit buffer */ |
1da177e4 | 843 | fepcmd(ch, STOUT, (unsigned) tail, 0, 0, 0); |
1da177e4 | 844 | memoff(ch); |
f2cf8e25 | 845 | spin_unlock_irqrestore(&epca_lock, flags); |
1da177e4 | 846 | tty_wakeup(tty); |
1da177e4 LT |
847 | } /* End pc_flush_buffer */ |
848 | ||
849 | /* ------------------ Begin pc_flush_chars ---------------------- */ | |
850 | ||
851 | static void pc_flush_chars(struct tty_struct *tty) | |
852 | { /* Begin pc_flush_chars */ | |
1da177e4 | 853 | struct channel * ch; |
1da177e4 LT |
854 | /* --------------------------------------------------------- |
855 | verifyChannel returns the channel from the tty struct | |
856 | if it is valid. This serves as a sanity check. | |
857 | ------------------------------------------------------------- */ | |
f2cf8e25 | 858 | if ((ch = verifyChannel(tty)) != NULL) { |
1da177e4 | 859 | unsigned long flags; |
f2cf8e25 | 860 | spin_lock_irqsave(&epca_lock, flags); |
1da177e4 LT |
861 | /* ---------------------------------------------------------------- |
862 | If not already set and the transmitter is busy setup an event | |
863 | to indicate when the transmit empties. | |
864 | ------------------------------------------------------------------- */ | |
1da177e4 LT |
865 | if ((ch->statusflags & TXBUSY) && !(ch->statusflags & EMPTYWAIT)) |
866 | setup_empty_event(tty,ch); | |
f2cf8e25 | 867 | spin_unlock_irqrestore(&epca_lock, flags); |
1da177e4 | 868 | } |
1da177e4 LT |
869 | } /* End pc_flush_chars */ |
870 | ||
871 | /* ------------------ Begin block_til_ready ---------------------- */ | |
872 | ||
873 | static int block_til_ready(struct tty_struct *tty, | |
874 | struct file *filp, struct channel *ch) | |
875 | { /* Begin block_til_ready */ | |
1da177e4 LT |
876 | DECLARE_WAITQUEUE(wait,current); |
877 | int retval, do_clocal = 0; | |
878 | unsigned long flags; | |
879 | ||
f2cf8e25 | 880 | if (tty_hung_up_p(filp)) { |
1da177e4 LT |
881 | if (ch->asyncflags & ASYNC_HUP_NOTIFY) |
882 | retval = -EAGAIN; | |
883 | else | |
884 | retval = -ERESTARTSYS; | |
885 | return(retval); | |
886 | } | |
887 | ||
888 | /* ----------------------------------------------------------------- | |
889 | If the device is in the middle of being closed, then block | |
890 | until it's done, and then try again. | |
891 | -------------------------------------------------------------------- */ | |
f2cf8e25 | 892 | if (ch->asyncflags & ASYNC_CLOSING) { |
1da177e4 LT |
893 | interruptible_sleep_on(&ch->close_wait); |
894 | ||
895 | if (ch->asyncflags & ASYNC_HUP_NOTIFY) | |
896 | return -EAGAIN; | |
897 | else | |
898 | return -ERESTARTSYS; | |
899 | } | |
900 | ||
f2cf8e25 | 901 | if (filp->f_flags & O_NONBLOCK) { |
1da177e4 LT |
902 | /* ----------------------------------------------------------------- |
903 | If non-blocking mode is set, then make the check up front | |
904 | and then exit. | |
905 | -------------------------------------------------------------------- */ | |
1da177e4 | 906 | ch->asyncflags |= ASYNC_NORMAL_ACTIVE; |
1da177e4 LT |
907 | return 0; |
908 | } | |
1da177e4 LT |
909 | if (tty->termios->c_cflag & CLOCAL) |
910 | do_clocal = 1; | |
f2cf8e25 | 911 | /* Block waiting for the carrier detect and the line to become free */ |
1da177e4 LT |
912 | |
913 | retval = 0; | |
914 | add_wait_queue(&ch->open_wait, &wait); | |
1da177e4 | 915 | |
f2cf8e25 | 916 | spin_lock_irqsave(&epca_lock, flags); |
1da177e4 LT |
917 | /* We dec count so that pc_close will know when to free things */ |
918 | if (!tty_hung_up_p(filp)) | |
919 | ch->count--; | |
1da177e4 | 920 | ch->blocked_open++; |
1da177e4 LT |
921 | while(1) |
922 | { /* Begin forever while */ | |
1da177e4 | 923 | set_current_state(TASK_INTERRUPTIBLE); |
1da177e4 LT |
924 | if (tty_hung_up_p(filp) || |
925 | !(ch->asyncflags & ASYNC_INITIALIZED)) | |
926 | { | |
927 | if (ch->asyncflags & ASYNC_HUP_NOTIFY) | |
928 | retval = -EAGAIN; | |
929 | else | |
930 | retval = -ERESTARTSYS; | |
931 | break; | |
932 | } | |
1da177e4 LT |
933 | if (!(ch->asyncflags & ASYNC_CLOSING) && |
934 | (do_clocal || (ch->imodem & ch->dcd))) | |
935 | break; | |
f2cf8e25 | 936 | if (signal_pending(current)) { |
1da177e4 LT |
937 | retval = -ERESTARTSYS; |
938 | break; | |
939 | } | |
f2cf8e25 | 940 | spin_unlock_irqrestore(&epca_lock, flags); |
1da177e4 LT |
941 | /* --------------------------------------------------------------- |
942 | Allow someone else to be scheduled. We will occasionally go | |
943 | through this loop until one of the above conditions change. | |
944 | The below schedule call will allow other processes to enter and | |
945 | prevent this loop from hogging the cpu. | |
946 | ------------------------------------------------------------------ */ | |
947 | schedule(); | |
f2cf8e25 | 948 | spin_lock_irqsave(&epca_lock, flags); |
1da177e4 LT |
949 | |
950 | } /* End forever while */ | |
951 | ||
cc0a8fbb | 952 | __set_current_state(TASK_RUNNING); |
1da177e4 | 953 | remove_wait_queue(&ch->open_wait, &wait); |
1da177e4 LT |
954 | if (!tty_hung_up_p(filp)) |
955 | ch->count++; | |
1da177e4 LT |
956 | ch->blocked_open--; |
957 | ||
f2cf8e25 AC |
958 | spin_unlock_irqrestore(&epca_lock, flags); |
959 | ||
1da177e4 LT |
960 | if (retval) |
961 | return retval; | |
962 | ||
963 | ch->asyncflags |= ASYNC_NORMAL_ACTIVE; | |
1da177e4 | 964 | return 0; |
1da177e4 LT |
965 | } /* End block_til_ready */ |
966 | ||
967 | /* ------------------ Begin pc_open ---------------------- */ | |
968 | ||
969 | static int pc_open(struct tty_struct *tty, struct file * filp) | |
970 | { /* Begin pc_open */ | |
971 | ||
972 | struct channel *ch; | |
973 | unsigned long flags; | |
974 | int line, retval, boardnum; | |
bc9a5154 | 975 | struct board_chan __iomem *bc; |
f2cf8e25 | 976 | unsigned int head; |
1da177e4 LT |
977 | |
978 | line = tty->index; | |
f2cf8e25 AC |
979 | if (line < 0 || line >= nbdevs) |
980 | return -ENODEV; | |
1da177e4 LT |
981 | |
982 | ch = &digi_channels[line]; | |
983 | boardnum = ch->boardnum; | |
984 | ||
985 | /* Check status of board configured in system. */ | |
986 | ||
987 | /* ----------------------------------------------------------------- | |
988 | I check to see if the epca_setup routine detected an user error. | |
989 | It might be better to put this in pc_init, but for the moment it | |
990 | goes here. | |
991 | ---------------------------------------------------------------------- */ | |
992 | ||
f2cf8e25 | 993 | if (invalid_lilo_config) { |
1da177e4 | 994 | if (setup_error_code & INVALID_BOARD_TYPE) |
f2cf8e25 | 995 | printk(KERN_ERR "epca: pc_open: Invalid board type specified in kernel options.\n"); |
1da177e4 | 996 | if (setup_error_code & INVALID_NUM_PORTS) |
f2cf8e25 | 997 | printk(KERN_ERR "epca: pc_open: Invalid number of ports specified in kernel options.\n"); |
1da177e4 | 998 | if (setup_error_code & INVALID_MEM_BASE) |
f2cf8e25 | 999 | printk(KERN_ERR "epca: pc_open: Invalid board memory address specified in kernel options.\n"); |
1da177e4 | 1000 | if (setup_error_code & INVALID_PORT_BASE) |
f2cf8e25 | 1001 | printk(KERN_ERR "epca; pc_open: Invalid board port address specified in kernel options.\n"); |
1da177e4 | 1002 | if (setup_error_code & INVALID_BOARD_STATUS) |
f2cf8e25 | 1003 | printk(KERN_ERR "epca: pc_open: Invalid board status specified in kernel options.\n"); |
1da177e4 | 1004 | if (setup_error_code & INVALID_ALTPIN) |
f2cf8e25 | 1005 | printk(KERN_ERR "epca: pc_open: Invalid board altpin specified in kernel options;\n"); |
1da177e4 | 1006 | tty->driver_data = NULL; /* Mark this device as 'down' */ |
f2cf8e25 | 1007 | return -ENODEV; |
1da177e4 | 1008 | } |
f2cf8e25 | 1009 | if (boardnum >= num_cards || boards[boardnum].status == DISABLED) { |
1da177e4 LT |
1010 | tty->driver_data = NULL; /* Mark this device as 'down' */ |
1011 | return(-ENODEV); | |
1012 | } | |
1013 | ||
f2cf8e25 | 1014 | if ((bc = ch->brdchan) == 0) { |
1da177e4 | 1015 | tty->driver_data = NULL; |
f2cf8e25 | 1016 | return -ENODEV; |
1da177e4 LT |
1017 | } |
1018 | ||
f2cf8e25 | 1019 | spin_lock_irqsave(&epca_lock, flags); |
1da177e4 LT |
1020 | /* ------------------------------------------------------------------ |
1021 | Every time a channel is opened, increment a counter. This is | |
1022 | necessary because we do not wish to flush and shutdown the channel | |
1023 | until the last app holding the channel open, closes it. | |
1024 | --------------------------------------------------------------------- */ | |
1da177e4 | 1025 | ch->count++; |
1da177e4 LT |
1026 | /* ---------------------------------------------------------------- |
1027 | Set a kernel structures pointer to our local channel | |
1028 | structure. This way we can get to it when passed only | |
1029 | a tty struct. | |
1030 | ------------------------------------------------------------------ */ | |
1da177e4 | 1031 | tty->driver_data = ch; |
1da177e4 LT |
1032 | /* ---------------------------------------------------------------- |
1033 | If this is the first time the channel has been opened, initialize | |
1034 | the tty->termios struct otherwise let pc_close handle it. | |
1035 | -------------------------------------------------------------------- */ | |
1da177e4 LT |
1036 | globalwinon(ch); |
1037 | ch->statusflags = 0; | |
1038 | ||
1039 | /* Save boards current modem status */ | |
bc9a5154 | 1040 | ch->imodem = readb(&bc->mstat); |
1da177e4 LT |
1041 | |
1042 | /* ---------------------------------------------------------------- | |
1043 | Set receive head and tail ptrs to each other. This indicates | |
1044 | no data available to read. | |
1045 | ----------------------------------------------------------------- */ | |
f2cf8e25 AC |
1046 | head = readw(&bc->rin); |
1047 | writew(head, &bc->rout); | |
1da177e4 LT |
1048 | |
1049 | /* Set the channels associated tty structure */ | |
1050 | ch->tty = tty; | |
1051 | ||
1052 | /* ----------------------------------------------------------------- | |
1053 | The below routine generally sets up parity, baud, flow control | |
1054 | issues, etc.... It effect both control flags and input flags. | |
1055 | -------------------------------------------------------------------- */ | |
1056 | epcaparam(tty,ch); | |
1da177e4 LT |
1057 | ch->asyncflags |= ASYNC_INITIALIZED; |
1058 | memoff(ch); | |
f2cf8e25 | 1059 | spin_unlock_irqrestore(&epca_lock, flags); |
1da177e4 LT |
1060 | |
1061 | retval = block_til_ready(tty, filp, ch); | |
1062 | if (retval) | |
1da177e4 | 1063 | return retval; |
1da177e4 LT |
1064 | /* ------------------------------------------------------------- |
1065 | Set this again in case a hangup set it to zero while this | |
1066 | open() was waiting for the line... | |
1067 | --------------------------------------------------------------- */ | |
f2cf8e25 | 1068 | spin_lock_irqsave(&epca_lock, flags); |
1da177e4 | 1069 | ch->tty = tty; |
1da177e4 | 1070 | globalwinon(ch); |
1da177e4 | 1071 | /* Enable Digi Data events */ |
f2cf8e25 | 1072 | writeb(1, &bc->idata); |
1da177e4 | 1073 | memoff(ch); |
f2cf8e25 | 1074 | spin_unlock_irqrestore(&epca_lock, flags); |
1da177e4 | 1075 | return 0; |
1da177e4 LT |
1076 | } /* End pc_open */ |
1077 | ||
1da177e4 LT |
1078 | static int __init epca_module_init(void) |
1079 | { /* Begin init_module */ | |
f2cf8e25 | 1080 | return pc_init(); |
1da177e4 LT |
1081 | } |
1082 | ||
1083 | module_init(epca_module_init); | |
1da177e4 | 1084 | |
1da177e4 | 1085 | static struct pci_driver epca_driver; |
1da177e4 LT |
1086 | |
1087 | static void __exit epca_module_exit(void) | |
1088 | { | |
1da177e4 LT |
1089 | int count, crd; |
1090 | struct board_info *bd; | |
1091 | struct channel *ch; | |
1da177e4 LT |
1092 | |
1093 | del_timer_sync(&epca_timer); | |
1094 | ||
1da177e4 LT |
1095 | if ((tty_unregister_driver(pc_driver)) || |
1096 | (tty_unregister_driver(pc_info))) | |
1097 | { | |
f2cf8e25 | 1098 | printk(KERN_WARNING "epca: cleanup_module failed to un-register tty driver\n"); |
1da177e4 LT |
1099 | return; |
1100 | } | |
1101 | put_tty_driver(pc_driver); | |
1102 | put_tty_driver(pc_info); | |
1103 | ||
f2cf8e25 | 1104 | for (crd = 0; crd < num_cards; crd++) { /* Begin for each card */ |
1da177e4 | 1105 | bd = &boards[crd]; |
1da177e4 LT |
1106 | if (!bd) |
1107 | { /* Begin sanity check */ | |
1108 | printk(KERN_ERR "<Error> - Digi : cleanup_module failed\n"); | |
1109 | return; | |
1110 | } /* End sanity check */ | |
f2cf8e25 | 1111 | ch = card_ptr[crd]; |
1da177e4 LT |
1112 | for (count = 0; count < bd->numports; count++, ch++) |
1113 | { /* Begin for each port */ | |
b3218a79 JS |
1114 | if (ch && ch->tty) |
1115 | tty_hangup(ch->tty); | |
1da177e4 LT |
1116 | } /* End for each port */ |
1117 | } /* End for each card */ | |
1da177e4 | 1118 | pci_unregister_driver (&epca_driver); |
1da177e4 | 1119 | } |
f2cf8e25 | 1120 | |
1da177e4 | 1121 | module_exit(epca_module_exit); |
1da177e4 | 1122 | |
b68e31d0 | 1123 | static const struct tty_operations pc_ops = { |
1da177e4 LT |
1124 | .open = pc_open, |
1125 | .close = pc_close, | |
1126 | .write = pc_write, | |
1127 | .write_room = pc_write_room, | |
1128 | .flush_buffer = pc_flush_buffer, | |
1129 | .chars_in_buffer = pc_chars_in_buffer, | |
1130 | .flush_chars = pc_flush_chars, | |
1131 | .put_char = pc_put_char, | |
1132 | .ioctl = pc_ioctl, | |
1133 | .set_termios = pc_set_termios, | |
1134 | .stop = pc_stop, | |
1135 | .start = pc_start, | |
1136 | .throttle = pc_throttle, | |
1137 | .unthrottle = pc_unthrottle, | |
1138 | .hangup = pc_hangup, | |
1139 | }; | |
1140 | ||
1141 | static int info_open(struct tty_struct *tty, struct file * filp) | |
1142 | { | |
1143 | return 0; | |
1144 | } | |
1145 | ||
1146 | static struct tty_operations info_ops = { | |
1147 | .open = info_open, | |
1148 | .ioctl = info_ioctl, | |
1149 | }; | |
1150 | ||
1151 | /* ------------------ Begin pc_init ---------------------- */ | |
1152 | ||
f2cf8e25 | 1153 | static int __init pc_init(void) |
1da177e4 | 1154 | { /* Begin pc_init */ |
1da177e4 LT |
1155 | int crd; |
1156 | struct board_info *bd; | |
1157 | unsigned char board_id = 0; | |
dabad056 | 1158 | int err = -ENOMEM; |
1da177e4 | 1159 | |
1da177e4 LT |
1160 | int pci_boards_found, pci_count; |
1161 | ||
1162 | pci_count = 0; | |
1da177e4 LT |
1163 | |
1164 | pc_driver = alloc_tty_driver(MAX_ALLOC); | |
1165 | if (!pc_driver) | |
dabad056 | 1166 | goto out1; |
1da177e4 LT |
1167 | |
1168 | pc_info = alloc_tty_driver(MAX_ALLOC); | |
dabad056 AM |
1169 | if (!pc_info) |
1170 | goto out2; | |
1da177e4 LT |
1171 | |
1172 | /* ----------------------------------------------------------------------- | |
1173 | If epca_setup has not been ran by LILO set num_cards to defaults; copy | |
1174 | board structure defined by digiConfig into drivers board structure. | |
1175 | Note : If LILO has ran epca_setup then epca_setup will handle defining | |
1176 | num_cards as well as copying the data into the board structure. | |
1177 | -------------------------------------------------------------------------- */ | |
f2cf8e25 | 1178 | if (!liloconfig) { /* Begin driver has been configured via. epcaconfig */ |
1da177e4 LT |
1179 | |
1180 | nbdevs = NBDEVS; | |
1181 | num_cards = NUMCARDS; | |
1182 | memcpy((void *)&boards, (void *)&static_boards, | |
1183 | (sizeof(struct board_info) * NUMCARDS)); | |
1184 | } /* End driver has been configured via. epcaconfig */ | |
1185 | ||
1186 | /* ----------------------------------------------------------------- | |
1187 | Note : If lilo was used to configure the driver and the | |
1188 | ignore epcaconfig option was choosen (digiepca=2) then | |
1189 | nbdevs and num_cards will equal 0 at this point. This is | |
1190 | okay; PCI cards will still be picked up if detected. | |
1191 | --------------------------------------------------------------------- */ | |
1192 | ||
1193 | /* ----------------------------------------------------------- | |
1194 | Set up interrupt, we will worry about memory allocation in | |
1195 | post_fep_init. | |
1196 | --------------------------------------------------------------- */ | |
1197 | ||
1198 | ||
1199 | printk(KERN_INFO "DIGI epca driver version %s loaded.\n",VERSION); | |
1200 | ||
1da177e4 LT |
1201 | /* ------------------------------------------------------------------ |
1202 | NOTE : This code assumes that the number of ports found in | |
1203 | the boards array is correct. This could be wrong if | |
1204 | the card in question is PCI (And therefore has no ports | |
1205 | entry in the boards structure.) The rest of the | |
1206 | information will be valid for PCI because the beginning | |
1207 | of pc_init scans for PCI and determines i/o and base | |
1208 | memory addresses. I am not sure if it is possible to | |
1209 | read the number of ports supported by the card prior to | |
1210 | it being booted (Since that is the state it is in when | |
1211 | pc_init is run). Because it is not possible to query the | |
1212 | number of supported ports until after the card has booted; | |
1213 | we are required to calculate the card_ptrs as the card is | |
1214 | is initialized (Inside post_fep_init). The negative thing | |
1215 | about this approach is that digiDload's call to GET_INFO | |
1216 | will have a bad port value. (Since this is called prior | |
1217 | to post_fep_init.) | |
1218 | ||
1219 | --------------------------------------------------------------------- */ | |
1220 | ||
1221 | pci_boards_found = 0; | |
1222 | if(num_cards < MAXBOARDS) | |
1223 | pci_boards_found += init_PCI(); | |
1224 | num_cards += pci_boards_found; | |
1225 | ||
1da177e4 LT |
1226 | pc_driver->owner = THIS_MODULE; |
1227 | pc_driver->name = "ttyD"; | |
1da177e4 LT |
1228 | pc_driver->major = DIGI_MAJOR; |
1229 | pc_driver->minor_start = 0; | |
1230 | pc_driver->type = TTY_DRIVER_TYPE_SERIAL; | |
1231 | pc_driver->subtype = SERIAL_TYPE_NORMAL; | |
1232 | pc_driver->init_termios = tty_std_termios; | |
1233 | pc_driver->init_termios.c_iflag = 0; | |
1234 | pc_driver->init_termios.c_oflag = 0; | |
1235 | pc_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL; | |
1236 | pc_driver->init_termios.c_lflag = 0; | |
606d099c AC |
1237 | pc_driver->init_termios.c_ispeed = 9600; |
1238 | pc_driver->init_termios.c_ospeed = 9600; | |
1da177e4 LT |
1239 | pc_driver->flags = TTY_DRIVER_REAL_RAW; |
1240 | tty_set_operations(pc_driver, &pc_ops); | |
1241 | ||
1242 | pc_info->owner = THIS_MODULE; | |
1243 | pc_info->name = "digi_ctl"; | |
1244 | pc_info->major = DIGIINFOMAJOR; | |
1245 | pc_info->minor_start = 0; | |
1246 | pc_info->type = TTY_DRIVER_TYPE_SERIAL; | |
1247 | pc_info->subtype = SERIAL_TYPE_INFO; | |
1248 | pc_info->init_termios = tty_std_termios; | |
1249 | pc_info->init_termios.c_iflag = 0; | |
1250 | pc_info->init_termios.c_oflag = 0; | |
1251 | pc_info->init_termios.c_lflag = 0; | |
1252 | pc_info->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL; | |
606d099c AC |
1253 | pc_info->init_termios.c_ispeed = 9600; |
1254 | pc_info->init_termios.c_ospeed = 9600; | |
1da177e4 LT |
1255 | pc_info->flags = TTY_DRIVER_REAL_RAW; |
1256 | tty_set_operations(pc_info, &info_ops); | |
1257 | ||
1258 | ||
1da177e4 LT |
1259 | for (crd = 0; crd < num_cards; crd++) |
1260 | { /* Begin for each card */ | |
1261 | ||
1262 | /* ------------------------------------------------------------------ | |
1263 | This is where the appropriate memory handlers for the hardware is | |
1264 | set. Everything at runtime blindly jumps through these vectors. | |
1265 | ---------------------------------------------------------------------- */ | |
1266 | ||
1267 | /* defined in epcaconfig.h */ | |
1268 | bd = &boards[crd]; | |
1269 | ||
1270 | switch (bd->type) | |
1271 | { /* Begin switch on bd->type {board type} */ | |
1272 | case PCXEM: | |
1273 | case EISAXEM: | |
1274 | bd->memwinon = pcxem_memwinon ; | |
1275 | bd->memwinoff = pcxem_memwinoff ; | |
1276 | bd->globalwinon = pcxem_globalwinon ; | |
1277 | bd->txwinon = pcxem_txwinon ; | |
1278 | bd->rxwinon = pcxem_rxwinon ; | |
1279 | bd->memoff = pcxem_memoff ; | |
1280 | bd->assertgwinon = dummy_assertgwinon; | |
1281 | bd->assertmemoff = dummy_assertmemoff; | |
1282 | break; | |
1283 | ||
1284 | case PCIXEM: | |
1285 | case PCIXRJ: | |
1286 | case PCIXR: | |
1287 | bd->memwinon = dummy_memwinon; | |
1288 | bd->memwinoff = dummy_memwinoff; | |
1289 | bd->globalwinon = dummy_globalwinon; | |
1290 | bd->txwinon = dummy_txwinon; | |
1291 | bd->rxwinon = dummy_rxwinon; | |
1292 | bd->memoff = dummy_memoff; | |
1293 | bd->assertgwinon = dummy_assertgwinon; | |
1294 | bd->assertmemoff = dummy_assertmemoff; | |
1295 | break; | |
1296 | ||
1297 | case PCXE: | |
1298 | case PCXEVE: | |
1299 | ||
1300 | bd->memwinon = pcxe_memwinon; | |
1301 | bd->memwinoff = pcxe_memwinoff; | |
1302 | bd->globalwinon = pcxe_globalwinon; | |
1303 | bd->txwinon = pcxe_txwinon; | |
1304 | bd->rxwinon = pcxe_rxwinon; | |
1305 | bd->memoff = pcxe_memoff; | |
1306 | bd->assertgwinon = dummy_assertgwinon; | |
1307 | bd->assertmemoff = dummy_assertmemoff; | |
1308 | break; | |
1309 | ||
1310 | case PCXI: | |
1311 | case PC64XE: | |
1312 | ||
1313 | bd->memwinon = pcxi_memwinon; | |
1314 | bd->memwinoff = pcxi_memwinoff; | |
1315 | bd->globalwinon = pcxi_globalwinon; | |
1316 | bd->txwinon = pcxi_txwinon; | |
1317 | bd->rxwinon = pcxi_rxwinon; | |
1318 | bd->memoff = pcxi_memoff; | |
1319 | bd->assertgwinon = pcxi_assertgwinon; | |
1320 | bd->assertmemoff = pcxi_assertmemoff; | |
1321 | break; | |
1322 | ||
1323 | default: | |
1324 | break; | |
1325 | ||
1326 | } /* End switch on bd->type */ | |
1327 | ||
1328 | /* --------------------------------------------------------------- | |
1329 | Some cards need a memory segment to be defined for use in | |
1330 | transmit and receive windowing operations. These boards | |
1331 | are listed in the below switch. In the case of the XI the | |
1332 | amount of memory on the board is variable so the memory_seg | |
1333 | is also variable. This code determines what they segment | |
1334 | should be. | |
1335 | ----------------------------------------------------------------- */ | |
1336 | ||
1337 | switch (bd->type) | |
1338 | { /* Begin switch on bd->type {board type} */ | |
1339 | ||
1340 | case PCXE: | |
1341 | case PCXEVE: | |
1342 | case PC64XE: | |
1343 | bd->memory_seg = 0xf000; | |
1344 | break; | |
1345 | ||
1346 | case PCXI: | |
1347 | board_id = inb((int)bd->port); | |
1348 | if ((board_id & 0x1) == 0x1) | |
1349 | { /* Begin it's an XI card */ | |
1350 | ||
1351 | /* Is it a 64K board */ | |
1352 | if ((board_id & 0x30) == 0) | |
1353 | bd->memory_seg = 0xf000; | |
1354 | ||
1355 | /* Is it a 128K board */ | |
1356 | if ((board_id & 0x30) == 0x10) | |
1357 | bd->memory_seg = 0xe000; | |
1358 | ||
1359 | /* Is is a 256K board */ | |
1360 | if ((board_id & 0x30) == 0x20) | |
1361 | bd->memory_seg = 0xc000; | |
1362 | ||
1363 | /* Is it a 512K board */ | |
1364 | if ((board_id & 0x30) == 0x30) | |
1365 | bd->memory_seg = 0x8000; | |
1366 | ||
f2cf8e25 | 1367 | } else printk(KERN_ERR "epca: Board at 0x%x doesn't appear to be an XI\n",(int)bd->port); |
1da177e4 LT |
1368 | break; |
1369 | ||
1370 | } /* End switch on bd->type */ | |
1371 | ||
1372 | } /* End for each card */ | |
1373 | ||
dabad056 AM |
1374 | err = tty_register_driver(pc_driver); |
1375 | if (err) { | |
1376 | printk(KERN_ERR "Couldn't register Digi PC/ driver"); | |
1377 | goto out3; | |
1378 | } | |
1da177e4 | 1379 | |
dabad056 AM |
1380 | err = tty_register_driver(pc_info); |
1381 | if (err) { | |
1382 | printk(KERN_ERR "Couldn't register Digi PC/ info "); | |
1383 | goto out4; | |
1384 | } | |
1da177e4 LT |
1385 | |
1386 | /* ------------------------------------------------------------------- | |
1387 | Start up the poller to check for events on all enabled boards | |
1388 | ---------------------------------------------------------------------- */ | |
1389 | ||
1390 | init_timer(&epca_timer); | |
1391 | epca_timer.function = epcapoll; | |
1392 | mod_timer(&epca_timer, jiffies + HZ/25); | |
1da177e4 LT |
1393 | return 0; |
1394 | ||
dabad056 AM |
1395 | out4: |
1396 | tty_unregister_driver(pc_driver); | |
1397 | out3: | |
1398 | put_tty_driver(pc_info); | |
1399 | out2: | |
1400 | put_tty_driver(pc_driver); | |
1401 | out1: | |
1402 | return err; | |
1403 | ||
1da177e4 LT |
1404 | } /* End pc_init */ |
1405 | ||
1406 | /* ------------------ Begin post_fep_init ---------------------- */ | |
1407 | ||
1408 | static void post_fep_init(unsigned int crd) | |
1409 | { /* Begin post_fep_init */ | |
1410 | ||
1411 | int i; | |
bc9a5154 AV |
1412 | void __iomem *memaddr; |
1413 | struct global_data __iomem *gd; | |
1da177e4 | 1414 | struct board_info *bd; |
bc9a5154 | 1415 | struct board_chan __iomem *bc; |
1da177e4 LT |
1416 | struct channel *ch; |
1417 | int shrinkmem = 0, lowwater ; | |
1418 | ||
1419 | /* ------------------------------------------------------------- | |
1420 | This call is made by the user via. the ioctl call DIGI_INIT. | |
1421 | It is responsible for setting up all the card specific stuff. | |
1422 | ---------------------------------------------------------------- */ | |
1423 | bd = &boards[crd]; | |
1424 | ||
1425 | /* ----------------------------------------------------------------- | |
1426 | If this is a PCI board, get the port info. Remember PCI cards | |
1427 | do not have entries into the epcaconfig.h file, so we can't get | |
1428 | the number of ports from it. Unfortunetly, this means that anyone | |
1429 | doing a DIGI_GETINFO before the board has booted will get an invalid | |
1430 | number of ports returned (It should return 0). Calls to DIGI_GETINFO | |
1431 | after DIGI_INIT has been called will return the proper values. | |
1432 | ------------------------------------------------------------------- */ | |
1433 | ||
f2cf8e25 | 1434 | if (bd->type >= PCIXEM) { /* Begin get PCI number of ports */ |
1da177e4 LT |
1435 | /* -------------------------------------------------------------------- |
1436 | Below we use XEMPORTS as a memory offset regardless of which PCI | |
1437 | card it is. This is because all of the supported PCI cards have | |
1438 | the same memory offset for the channel data. This will have to be | |
1439 | changed if we ever develop a PCI/XE card. NOTE : The FEP manual | |
1440 | states that the port offset is 0xC22 as opposed to 0xC02. This is | |
1441 | only true for PC/XE, and PC/XI cards; not for the XEM, or CX series. | |
1442 | On the PCI cards the number of ports is determined by reading a | |
1443 | ID PROM located in the box attached to the card. The card can then | |
1444 | determine the index the id to determine the number of ports available. | |
1445 | (FYI - The id should be located at 0x1ac (And may use up to 4 bytes | |
1446 | if the box in question is a XEM or CX)). | |
1447 | ------------------------------------------------------------------------ */ | |
f2cf8e25 AC |
1448 | /* PCI cards are already remapped at this point ISA are not */ |
1449 | bd->numports = readw(bd->re_map_membase + XEMPORTS); | |
1da177e4 LT |
1450 | epcaassert(bd->numports <= 64,"PCI returned a invalid number of ports"); |
1451 | nbdevs += (bd->numports); | |
f2cf8e25 AC |
1452 | } else { |
1453 | /* Fix up the mappings for ISA/EISA etc */ | |
1454 | /* FIXME: 64K - can we be smarter ? */ | |
1455 | bd->re_map_membase = ioremap(bd->membase, 0x10000); | |
1456 | } | |
1da177e4 LT |
1457 | |
1458 | if (crd != 0) | |
1459 | card_ptr[crd] = card_ptr[crd-1] + boards[crd-1].numports; | |
1460 | else | |
1461 | card_ptr[crd] = &digi_channels[crd]; /* <- For card 0 only */ | |
1462 | ||
1463 | ch = card_ptr[crd]; | |
1da177e4 LT |
1464 | epcaassert(ch <= &digi_channels[nbdevs - 1], "ch out of range"); |
1465 | ||
f2cf8e25 | 1466 | memaddr = bd->re_map_membase; |
1da177e4 LT |
1467 | |
1468 | /* ----------------------------------------------------------------- | |
1469 | The below assignment will set bc to point at the BEGINING of | |
1470 | the cards channel structures. For 1 card there will be between | |
1471 | 8 and 64 of these structures. | |
1472 | -------------------------------------------------------------------- */ | |
1473 | ||
bc9a5154 | 1474 | bc = memaddr + CHANSTRUCT; |
1da177e4 LT |
1475 | |
1476 | /* ------------------------------------------------------------------- | |
1477 | The below assignment will set gd to point at the BEGINING of | |
1478 | global memory address 0xc00. The first data in that global | |
1479 | memory actually starts at address 0xc1a. The command in | |
1480 | pointer begins at 0xd10. | |
1481 | ---------------------------------------------------------------------- */ | |
1482 | ||
bc9a5154 | 1483 | gd = memaddr + GLOBAL; |
1da177e4 LT |
1484 | |
1485 | /* -------------------------------------------------------------------- | |
1486 | XEPORTS (address 0xc22) points at the number of channels the | |
1487 | card supports. (For 64XE, XI, XEM, and XR use 0xc02) | |
1488 | ----------------------------------------------------------------------- */ | |
1489 | ||
f2cf8e25 | 1490 | if ((bd->type == PCXEVE || bd->type == PCXE) && (readw(memaddr + XEPORTS) < 3)) |
1da177e4 LT |
1491 | shrinkmem = 1; |
1492 | if (bd->type < PCIXEM) | |
1493 | if (!request_region((int)bd->port, 4, board_desc[bd->type])) | |
1494 | return; | |
1da177e4 LT |
1495 | memwinon(bd, 0); |
1496 | ||
1497 | /* -------------------------------------------------------------------- | |
1498 | Remember ch is the main drivers channels structure, while bc is | |
1499 | the cards channel structure. | |
1500 | ------------------------------------------------------------------------ */ | |
1501 | ||
1502 | /* For every port on the card do ..... */ | |
1503 | ||
f2cf8e25 AC |
1504 | for (i = 0; i < bd->numports; i++, ch++, bc++) { /* Begin for each port */ |
1505 | unsigned long flags; | |
bc9a5154 | 1506 | u16 tseg, rseg; |
1da177e4 LT |
1507 | |
1508 | ch->brdchan = bc; | |
1509 | ch->mailbox = gd; | |
c4028958 | 1510 | INIT_WORK(&ch->tqueue, do_softint); |
1da177e4 LT |
1511 | ch->board = &boards[crd]; |
1512 | ||
f2cf8e25 AC |
1513 | spin_lock_irqsave(&epca_lock, flags); |
1514 | switch (bd->type) { | |
1da177e4 LT |
1515 | /* ---------------------------------------------------------------- |
1516 | Since some of the boards use different bitmaps for their | |
1517 | control signals we cannot hard code these values and retain | |
1518 | portability. We virtualize this data here. | |
1519 | ------------------------------------------------------------------- */ | |
1520 | case EISAXEM: | |
1521 | case PCXEM: | |
1522 | case PCIXEM: | |
1523 | case PCIXRJ: | |
1524 | case PCIXR: | |
1525 | ch->m_rts = 0x02 ; | |
1526 | ch->m_dcd = 0x80 ; | |
1527 | ch->m_dsr = 0x20 ; | |
1528 | ch->m_cts = 0x10 ; | |
1529 | ch->m_ri = 0x40 ; | |
1530 | ch->m_dtr = 0x01 ; | |
1531 | break; | |
1532 | ||
1533 | case PCXE: | |
1534 | case PCXEVE: | |
1535 | case PCXI: | |
1536 | case PC64XE: | |
1537 | ch->m_rts = 0x02 ; | |
1538 | ch->m_dcd = 0x08 ; | |
1539 | ch->m_dsr = 0x10 ; | |
1540 | ch->m_cts = 0x20 ; | |
1541 | ch->m_ri = 0x40 ; | |
1542 | ch->m_dtr = 0x80 ; | |
1543 | break; | |
1544 | ||
1545 | } /* End switch bd->type */ | |
1546 | ||
f2cf8e25 | 1547 | if (boards[crd].altpin) { |
1da177e4 LT |
1548 | ch->dsr = ch->m_dcd; |
1549 | ch->dcd = ch->m_dsr; | |
1550 | ch->digiext.digi_flags |= DIGI_ALTPIN; | |
1551 | } | |
f2cf8e25 | 1552 | else { |
1da177e4 LT |
1553 | ch->dcd = ch->m_dcd; |
1554 | ch->dsr = ch->m_dsr; | |
1555 | } | |
1556 | ||
1557 | ch->boardnum = crd; | |
1558 | ch->channelnum = i; | |
1559 | ch->magic = EPCA_MAGIC; | |
1560 | ch->tty = NULL; | |
1561 | ||
f2cf8e25 | 1562 | if (shrinkmem) { |
1da177e4 LT |
1563 | fepcmd(ch, SETBUFFER, 32, 0, 0, 0); |
1564 | shrinkmem = 0; | |
1565 | } | |
1566 | ||
bc9a5154 AV |
1567 | tseg = readw(&bc->tseg); |
1568 | rseg = readw(&bc->rseg); | |
1569 | ||
f2cf8e25 | 1570 | switch (bd->type) { |
1da177e4 LT |
1571 | |
1572 | case PCIXEM: | |
1573 | case PCIXRJ: | |
1574 | case PCIXR: | |
1575 | /* Cover all the 2MEG cards */ | |
bc9a5154 AV |
1576 | ch->txptr = memaddr + ((tseg << 4) & 0x1fffff); |
1577 | ch->rxptr = memaddr + ((rseg << 4) & 0x1fffff); | |
1578 | ch->txwin = FEPWIN | (tseg >> 11); | |
1579 | ch->rxwin = FEPWIN | (rseg >> 11); | |
1da177e4 LT |
1580 | break; |
1581 | ||
1582 | case PCXEM: | |
1583 | case EISAXEM: | |
1584 | /* Cover all the 32K windowed cards */ | |
1585 | /* Mask equal to window size - 1 */ | |
bc9a5154 AV |
1586 | ch->txptr = memaddr + ((tseg << 4) & 0x7fff); |
1587 | ch->rxptr = memaddr + ((rseg << 4) & 0x7fff); | |
1588 | ch->txwin = FEPWIN | (tseg >> 11); | |
1589 | ch->rxwin = FEPWIN | (rseg >> 11); | |
1da177e4 LT |
1590 | break; |
1591 | ||
1592 | case PCXEVE: | |
1593 | case PCXE: | |
bc9a5154 AV |
1594 | ch->txptr = memaddr + (((tseg - bd->memory_seg) << 4) & 0x1fff); |
1595 | ch->txwin = FEPWIN | ((tseg - bd->memory_seg) >> 9); | |
1596 | ch->rxptr = memaddr + (((rseg - bd->memory_seg) << 4) & 0x1fff); | |
1597 | ch->rxwin = FEPWIN | ((rseg - bd->memory_seg) >>9 ); | |
1da177e4 LT |
1598 | break; |
1599 | ||
1600 | case PCXI: | |
1601 | case PC64XE: | |
bc9a5154 AV |
1602 | ch->txptr = memaddr + ((tseg - bd->memory_seg) << 4); |
1603 | ch->rxptr = memaddr + ((rseg - bd->memory_seg) << 4); | |
1da177e4 LT |
1604 | ch->txwin = ch->rxwin = 0; |
1605 | break; | |
1606 | ||
1607 | } /* End switch bd->type */ | |
1608 | ||
1609 | ch->txbufhead = 0; | |
bc9a5154 | 1610 | ch->txbufsize = readw(&bc->tmax) + 1; |
1da177e4 LT |
1611 | |
1612 | ch->rxbufhead = 0; | |
bc9a5154 | 1613 | ch->rxbufsize = readw(&bc->rmax) + 1; |
1da177e4 LT |
1614 | |
1615 | lowwater = ch->txbufsize >= 2000 ? 1024 : (ch->txbufsize / 2); | |
1616 | ||
1617 | /* Set transmitter low water mark */ | |
1618 | fepcmd(ch, STXLWATER, lowwater, 0, 10, 0); | |
1619 | ||
1620 | /* Set receiver low water mark */ | |
1621 | ||
1622 | fepcmd(ch, SRXLWATER, (ch->rxbufsize / 4), 0, 10, 0); | |
1623 | ||
1624 | /* Set receiver high water mark */ | |
1625 | ||
1626 | fepcmd(ch, SRXHWATER, (3 * ch->rxbufsize / 4), 0, 10, 0); | |
1627 | ||
f2cf8e25 AC |
1628 | writew(100, &bc->edelay); |
1629 | writeb(1, &bc->idata); | |
1da177e4 | 1630 | |
f2cf8e25 AC |
1631 | ch->startc = readb(&bc->startc); |
1632 | ch->stopc = readb(&bc->stopc); | |
1633 | ch->startca = readb(&bc->startca); | |
1634 | ch->stopca = readb(&bc->stopca); | |
1da177e4 LT |
1635 | |
1636 | ch->fepcflag = 0; | |
1637 | ch->fepiflag = 0; | |
1638 | ch->fepoflag = 0; | |
1639 | ch->fepstartc = 0; | |
1640 | ch->fepstopc = 0; | |
1641 | ch->fepstartca = 0; | |
1642 | ch->fepstopca = 0; | |
1643 | ||
1644 | ch->close_delay = 50; | |
1645 | ch->count = 0; | |
1646 | ch->blocked_open = 0; | |
1647 | init_waitqueue_head(&ch->open_wait); | |
1648 | init_waitqueue_head(&ch->close_wait); | |
f2cf8e25 AC |
1649 | |
1650 | spin_unlock_irqrestore(&epca_lock, flags); | |
1da177e4 LT |
1651 | } /* End for each port */ |
1652 | ||
1653 | printk(KERN_INFO | |
1654 | "Digi PC/Xx Driver V%s: %s I/O = 0x%lx Mem = 0x%lx Ports = %d\n", | |
1655 | VERSION, board_desc[bd->type], (long)bd->port, (long)bd->membase, bd->numports); | |
1da177e4 LT |
1656 | memwinoff(bd, 0); |
1657 | ||
1658 | } /* End post_fep_init */ | |
1659 | ||
1660 | /* --------------------- Begin epcapoll ------------------------ */ | |
1661 | ||
1662 | static void epcapoll(unsigned long ignored) | |
1663 | { /* Begin epcapoll */ | |
1664 | ||
1665 | unsigned long flags; | |
1666 | int crd; | |
1667 | volatile unsigned int head, tail; | |
1668 | struct channel *ch; | |
1669 | struct board_info *bd; | |
1670 | ||
1671 | /* ------------------------------------------------------------------- | |
1672 | This routine is called upon every timer interrupt. Even though | |
1673 | the Digi series cards are capable of generating interrupts this | |
1674 | method of non-looping polling is more efficient. This routine | |
1675 | checks for card generated events (Such as receive data, are transmit | |
1676 | buffer empty) and acts on those events. | |
1677 | ----------------------------------------------------------------------- */ | |
1678 | ||
1da177e4 LT |
1679 | for (crd = 0; crd < num_cards; crd++) |
1680 | { /* Begin for each card */ | |
1681 | ||
1682 | bd = &boards[crd]; | |
1683 | ch = card_ptr[crd]; | |
1684 | ||
1685 | if ((bd->status == DISABLED) || digi_poller_inhibited) | |
1686 | continue; /* Begin loop next interation */ | |
1687 | ||
1688 | /* ----------------------------------------------------------- | |
1689 | assertmemoff is not needed here; indeed it is an empty subroutine. | |
1690 | It is being kept because future boards may need this as well as | |
1691 | some legacy boards. | |
1692 | ---------------------------------------------------------------- */ | |
1693 | ||
f2cf8e25 AC |
1694 | spin_lock_irqsave(&epca_lock, flags); |
1695 | ||
1da177e4 LT |
1696 | assertmemoff(ch); |
1697 | ||
1698 | globalwinon(ch); | |
1699 | ||
1700 | /* --------------------------------------------------------------- | |
1701 | In this case head and tail actually refer to the event queue not | |
1702 | the transmit or receive queue. | |
1703 | ------------------------------------------------------------------- */ | |
1704 | ||
f2cf8e25 AC |
1705 | head = readw(&ch->mailbox->ein); |
1706 | tail = readw(&ch->mailbox->eout); | |
1da177e4 LT |
1707 | |
1708 | /* If head isn't equal to tail we have an event */ | |
1709 | ||
1710 | if (head != tail) | |
1711 | doevent(crd); | |
1da177e4 LT |
1712 | memoff(ch); |
1713 | ||
f2cf8e25 | 1714 | spin_unlock_irqrestore(&epca_lock, flags); |
1da177e4 | 1715 | |
f2cf8e25 | 1716 | } /* End for each card */ |
1da177e4 | 1717 | mod_timer(&epca_timer, jiffies + (HZ / 25)); |
1da177e4 LT |
1718 | } /* End epcapoll */ |
1719 | ||
1720 | /* --------------------- Begin doevent ------------------------ */ | |
1721 | ||
1722 | static void doevent(int crd) | |
1723 | { /* Begin doevent */ | |
1724 | ||
bc9a5154 | 1725 | void __iomem *eventbuf; |
1da177e4 LT |
1726 | struct channel *ch, *chan0; |
1727 | static struct tty_struct *tty; | |
f2cf8e25 | 1728 | struct board_info *bd; |
bc9a5154 | 1729 | struct board_chan __iomem *bc; |
f2cf8e25 AC |
1730 | unsigned int tail, head; |
1731 | int event, channel; | |
1732 | int mstat, lstat; | |
1da177e4 LT |
1733 | |
1734 | /* ------------------------------------------------------------------- | |
1735 | This subroutine is called by epcapoll when an event is detected | |
1736 | in the event queue. This routine responds to those events. | |
1737 | --------------------------------------------------------------------- */ | |
1da177e4 LT |
1738 | bd = &boards[crd]; |
1739 | ||
1740 | chan0 = card_ptr[crd]; | |
1741 | epcaassert(chan0 <= &digi_channels[nbdevs - 1], "ch out of range"); | |
1da177e4 | 1742 | assertgwinon(chan0); |
f2cf8e25 | 1743 | while ((tail = readw(&chan0->mailbox->eout)) != (head = readw(&chan0->mailbox->ein))) |
1da177e4 | 1744 | { /* Begin while something in event queue */ |
1da177e4 | 1745 | assertgwinon(chan0); |
f2cf8e25 | 1746 | eventbuf = bd->re_map_membase + tail + ISTART; |
1da177e4 | 1747 | /* Get the channel the event occurred on */ |
f2cf8e25 | 1748 | channel = readb(eventbuf); |
1da177e4 | 1749 | /* Get the actual event code that occurred */ |
f2cf8e25 | 1750 | event = readb(eventbuf + 1); |
1da177e4 LT |
1751 | /* ---------------------------------------------------------------- |
1752 | The two assignments below get the current modem status (mstat) | |
1753 | and the previous modem status (lstat). These are useful becuase | |
1754 | an event could signal a change in modem signals itself. | |
1755 | ------------------------------------------------------------------- */ | |
f2cf8e25 AC |
1756 | mstat = readb(eventbuf + 2); |
1757 | lstat = readb(eventbuf + 3); | |
1da177e4 LT |
1758 | |
1759 | ch = chan0 + channel; | |
f2cf8e25 | 1760 | if ((unsigned)channel >= bd->numports || !ch) { |
1da177e4 LT |
1761 | if (channel >= bd->numports) |
1762 | ch = chan0; | |
1763 | bc = ch->brdchan; | |
1764 | goto next; | |
1765 | } | |
1766 | ||
1767 | if ((bc = ch->brdchan) == NULL) | |
1768 | goto next; | |
1769 | ||
f2cf8e25 | 1770 | if (event & DATA_IND) { /* Begin DATA_IND */ |
1da177e4 LT |
1771 | receive_data(ch); |
1772 | assertgwinon(ch); | |
1da177e4 LT |
1773 | } /* End DATA_IND */ |
1774 | /* else *//* Fix for DCD transition missed bug */ | |
f2cf8e25 | 1775 | if (event & MODEMCHG_IND) { /* Begin MODEMCHG_IND */ |
1da177e4 | 1776 | /* A modem signal change has been indicated */ |
1da177e4 | 1777 | ch->imodem = mstat; |
f2cf8e25 | 1778 | if (ch->asyncflags & ASYNC_CHECK_CD) { |
1da177e4 LT |
1779 | if (mstat & ch->dcd) /* We are now receiving dcd */ |
1780 | wake_up_interruptible(&ch->open_wait); | |
1781 | else | |
1782 | pc_sched_event(ch, EPCA_EVENT_HANGUP); /* No dcd; hangup */ | |
1783 | } | |
1da177e4 | 1784 | } /* End MODEMCHG_IND */ |
1da177e4 | 1785 | tty = ch->tty; |
f2cf8e25 AC |
1786 | if (tty) { /* Begin if valid tty */ |
1787 | if (event & BREAK_IND) { /* Begin if BREAK_IND */ | |
1da177e4 | 1788 | /* A break has been indicated */ |
33f0f88f | 1789 | tty_insert_flip_char(tty, 0, TTY_BREAK); |
1da177e4 | 1790 | tty_schedule_flip(tty); |
f2cf8e25 | 1791 | } else if (event & LOWTX_IND) { /* Begin LOWTX_IND */ |
1da177e4 LT |
1792 | if (ch->statusflags & LOWWAIT) |
1793 | { /* Begin if LOWWAIT */ | |
1da177e4 LT |
1794 | ch->statusflags &= ~LOWWAIT; |
1795 | tty_wakeup(tty); | |
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 | } /* End if EMPTYWAIT */ |
1da177e4 | 1804 | } /* End EMPTYTX_IND */ |
1da177e4 | 1805 | } /* End if valid tty */ |
1da177e4 LT |
1806 | next: |
1807 | globalwinon(ch); | |
f2cf8e25 AC |
1808 | BUG_ON(!bc); |
1809 | writew(1, &bc->idata); | |
1810 | writew((tail + 4) & (IMAX - ISTART - 4), &chan0->mailbox->eout); | |
1da177e4 | 1811 | globalwinon(chan0); |
1da177e4 | 1812 | } /* End while something in event queue */ |
1da177e4 LT |
1813 | } /* End doevent */ |
1814 | ||
1815 | /* --------------------- Begin fepcmd ------------------------ */ | |
1816 | ||
1817 | static void fepcmd(struct channel *ch, int cmd, int word_or_byte, | |
1818 | int byte2, int ncmds, int bytecmd) | |
1819 | { /* Begin fepcmd */ | |
bc9a5154 | 1820 | unchar __iomem *memaddr; |
1da177e4 LT |
1821 | unsigned int head, cmdTail, cmdStart, cmdMax; |
1822 | long count; | |
1823 | int n; | |
1824 | ||
1825 | /* This is the routine in which commands may be passed to the card. */ | |
1826 | ||
1827 | if (ch->board->status == DISABLED) | |
1da177e4 | 1828 | return; |
1da177e4 | 1829 | assertgwinon(ch); |
1da177e4 | 1830 | /* Remember head (As well as max) is just an offset not a base addr */ |
f2cf8e25 | 1831 | head = readw(&ch->mailbox->cin); |
1da177e4 | 1832 | /* cmdStart is a base address */ |
f2cf8e25 | 1833 | cmdStart = readw(&ch->mailbox->cstart); |
1da177e4 LT |
1834 | /* ------------------------------------------------------------------ |
1835 | We do the addition below because we do not want a max pointer | |
1836 | relative to cmdStart. We want a max pointer that points at the | |
1837 | physical end of the command queue. | |
1838 | -------------------------------------------------------------------- */ | |
f2cf8e25 | 1839 | cmdMax = (cmdStart + 4 + readw(&ch->mailbox->cmax)); |
1da177e4 LT |
1840 | memaddr = ch->board->re_map_membase; |
1841 | ||
f2cf8e25 AC |
1842 | if (head >= (cmdMax - cmdStart) || (head & 03)) { |
1843 | printk(KERN_ERR "line %d: Out of range, cmd = %x, head = %x\n", __LINE__, cmd, head); | |
1844 | printk(KERN_ERR "line %d: Out of range, cmdMax = %x, cmdStart = %x\n", __LINE__, cmdMax, cmdStart); | |
1da177e4 LT |
1845 | return; |
1846 | } | |
f2cf8e25 AC |
1847 | if (bytecmd) { |
1848 | writeb(cmd, memaddr + head + cmdStart + 0); | |
1849 | writeb(ch->channelnum, memaddr + head + cmdStart + 1); | |
1da177e4 | 1850 | /* Below word_or_byte is bits to set */ |
f2cf8e25 | 1851 | writeb(word_or_byte, memaddr + head + cmdStart + 2); |
1da177e4 | 1852 | /* Below byte2 is bits to reset */ |
f2cf8e25 AC |
1853 | writeb(byte2, memaddr + head + cmdStart + 3); |
1854 | } else { | |
1855 | writeb(cmd, memaddr + head + cmdStart + 0); | |
1856 | writeb(ch->channelnum, memaddr + head + cmdStart + 1); | |
1857 | writeb(word_or_byte, memaddr + head + cmdStart + 2); | |
1da177e4 | 1858 | } |
1da177e4 | 1859 | head = (head + 4) & (cmdMax - cmdStart - 4); |
f2cf8e25 | 1860 | writew(head, &ch->mailbox->cin); |
1da177e4 LT |
1861 | count = FEPTIMEOUT; |
1862 | ||
f2cf8e25 | 1863 | for (;;) { /* Begin forever loop */ |
1da177e4 | 1864 | count--; |
f2cf8e25 | 1865 | if (count == 0) { |
1da177e4 LT |
1866 | printk(KERN_ERR "<Error> - Fep not responding in fepcmd()\n"); |
1867 | return; | |
1868 | } | |
f2cf8e25 AC |
1869 | head = readw(&ch->mailbox->cin); |
1870 | cmdTail = readw(&ch->mailbox->cout); | |
1da177e4 | 1871 | n = (head - cmdTail) & (cmdMax - cmdStart - 4); |
1da177e4 LT |
1872 | /* ---------------------------------------------------------- |
1873 | Basically this will break when the FEP acknowledges the | |
1874 | command by incrementing cmdTail (Making it equal to head). | |
1875 | ------------------------------------------------------------- */ | |
1da177e4 LT |
1876 | if (n <= ncmds * (sizeof(short) * 4)) |
1877 | break; /* Well nearly forever :-) */ | |
1da177e4 | 1878 | } /* End forever loop */ |
1da177e4 LT |
1879 | } /* End fepcmd */ |
1880 | ||
1881 | /* --------------------------------------------------------------------- | |
1882 | Digi products use fields in their channels structures that are very | |
1883 | similar to the c_cflag and c_iflag fields typically found in UNIX | |
1884 | termios structures. The below three routines allow mappings | |
1885 | between these hardware "flags" and their respective Linux flags. | |
1886 | ------------------------------------------------------------------------- */ | |
1887 | ||
1888 | /* --------------------- Begin termios2digi_h -------------------- */ | |
1889 | ||
1890 | static unsigned termios2digi_h(struct channel *ch, unsigned cflag) | |
1891 | { /* Begin termios2digi_h */ | |
1da177e4 LT |
1892 | unsigned res = 0; |
1893 | ||
f2cf8e25 | 1894 | if (cflag & CRTSCTS) { |
1da177e4 LT |
1895 | ch->digiext.digi_flags |= (RTSPACE | CTSPACE); |
1896 | res |= ((ch->m_cts) | (ch->m_rts)); | |
1897 | } | |
1898 | ||
1899 | if (ch->digiext.digi_flags & RTSPACE) | |
1900 | res |= ch->m_rts; | |
1901 | ||
1902 | if (ch->digiext.digi_flags & DTRPACE) | |
1903 | res |= ch->m_dtr; | |
1904 | ||
1905 | if (ch->digiext.digi_flags & CTSPACE) | |
1906 | res |= ch->m_cts; | |
1907 | ||
1908 | if (ch->digiext.digi_flags & DSRPACE) | |
1909 | res |= ch->dsr; | |
1910 | ||
1911 | if (ch->digiext.digi_flags & DCDPACE) | |
1912 | res |= ch->dcd; | |
1913 | ||
1914 | if (res & (ch->m_rts)) | |
1915 | ch->digiext.digi_flags |= RTSPACE; | |
1916 | ||
1917 | if (res & (ch->m_cts)) | |
1918 | ch->digiext.digi_flags |= CTSPACE; | |
1919 | ||
1920 | return res; | |
1921 | ||
1922 | } /* End termios2digi_h */ | |
1923 | ||
1924 | /* --------------------- Begin termios2digi_i -------------------- */ | |
1925 | static unsigned termios2digi_i(struct channel *ch, unsigned iflag) | |
1926 | { /* Begin termios2digi_i */ | |
1927 | ||
1928 | unsigned res = iflag & (IGNBRK | BRKINT | IGNPAR | PARMRK | | |
1929 | INPCK | ISTRIP|IXON|IXANY|IXOFF); | |
1da177e4 LT |
1930 | if (ch->digiext.digi_flags & DIGI_AIXON) |
1931 | res |= IAIXON; | |
1932 | return res; | |
1933 | ||
1934 | } /* End termios2digi_i */ | |
1935 | ||
1936 | /* --------------------- Begin termios2digi_c -------------------- */ | |
1937 | ||
1938 | static unsigned termios2digi_c(struct channel *ch, unsigned cflag) | |
1939 | { /* Begin termios2digi_c */ | |
1940 | ||
1941 | unsigned res = 0; | |
f2cf8e25 | 1942 | if (cflag & CBAUDEX) { /* Begin detected CBAUDEX */ |
1da177e4 | 1943 | ch->digiext.digi_flags |= DIGI_FAST; |
1da177e4 LT |
1944 | /* ------------------------------------------------------------- |
1945 | HUPCL bit is used by FEP to indicate fast baud | |
1946 | table is to be used. | |
1947 | ----------------------------------------------------------------- */ | |
1da177e4 | 1948 | res |= FEP_HUPCL; |
1da177e4 LT |
1949 | } /* End detected CBAUDEX */ |
1950 | else ch->digiext.digi_flags &= ~DIGI_FAST; | |
1da177e4 LT |
1951 | /* ------------------------------------------------------------------- |
1952 | CBAUD has bit position 0x1000 set these days to indicate Linux | |
1953 | baud rate remap. Digi hardware can't handle the bit assignment. | |
1954 | (We use a different bit assignment for high speed.). Clear this | |
1955 | bit out. | |
1956 | ---------------------------------------------------------------------- */ | |
1957 | res |= cflag & ((CBAUD ^ CBAUDEX) | PARODD | PARENB | CSTOPB | CSIZE); | |
1da177e4 LT |
1958 | /* ------------------------------------------------------------- |
1959 | This gets a little confusing. The Digi cards have their own | |
1960 | representation of c_cflags controling baud rate. For the most | |
1961 | part this is identical to the Linux implementation. However; | |
1962 | Digi supports one rate (76800) that Linux doesn't. This means | |
1963 | that the c_cflag entry that would normally mean 76800 for Digi | |
1964 | actually means 115200 under Linux. Without the below mapping, | |
1965 | a stty 115200 would only drive the board at 76800. Since | |
1966 | the rate 230400 is also found after 76800, the same problem afflicts | |
1967 | us when we choose a rate of 230400. Without the below modificiation | |
1968 | stty 230400 would actually give us 115200. | |
1969 | ||
1970 | There are two additional differences. The Linux value for CLOCAL | |
1971 | (0x800; 0004000) has no meaning to the Digi hardware. Also in | |
1972 | later releases of Linux; the CBAUD define has CBAUDEX (0x1000; | |
1973 | 0010000) ored into it (CBAUD = 0x100f as opposed to 0xf). CBAUDEX | |
1974 | should be checked for a screened out prior to termios2digi_c | |
1975 | returning. Since CLOCAL isn't used by the board this can be | |
1976 | ignored as long as the returned value is used only by Digi hardware. | |
f2cf8e25 AC |
1977 | ----------------------------------------------------------------- */ |
1978 | if (cflag & CBAUDEX) { | |
1da177e4 LT |
1979 | /* ------------------------------------------------------------- |
1980 | The below code is trying to guarantee that only baud rates | |
1981 | 115200 and 230400 are remapped. We use exclusive or because | |
1982 | the various baud rates share common bit positions and therefore | |
1983 | can't be tested for easily. | |
1984 | ----------------------------------------------------------------- */ | |
1985 | ||
1986 | ||
1987 | if ((!((cflag & 0x7) ^ (B115200 & ~CBAUDEX))) || | |
1988 | (!((cflag & 0x7) ^ (B230400 & ~CBAUDEX)))) | |
1da177e4 | 1989 | res += 1; |
1da177e4 | 1990 | } |
1da177e4 LT |
1991 | return res; |
1992 | ||
1993 | } /* End termios2digi_c */ | |
1994 | ||
1995 | /* --------------------- Begin epcaparam ----------------------- */ | |
1996 | ||
f2cf8e25 | 1997 | /* Caller must hold the locks */ |
1da177e4 LT |
1998 | static void epcaparam(struct tty_struct *tty, struct channel *ch) |
1999 | { /* Begin epcaparam */ | |
2000 | ||
2001 | unsigned int cmdHead; | |
606d099c | 2002 | struct ktermios *ts; |
bc9a5154 | 2003 | struct board_chan __iomem *bc; |
1da177e4 LT |
2004 | unsigned mval, hflow, cflag, iflag; |
2005 | ||
2006 | bc = ch->brdchan; | |
2007 | epcaassert(bc !=0, "bc out of range"); | |
2008 | ||
2009 | assertgwinon(ch); | |
1da177e4 | 2010 | ts = tty->termios; |
f2cf8e25 AC |
2011 | if ((ts->c_cflag & CBAUD) == 0) { /* Begin CBAUD detected */ |
2012 | cmdHead = readw(&bc->rin); | |
bc9a5154 | 2013 | writew(cmdHead, &bc->rout); |
f2cf8e25 | 2014 | cmdHead = readw(&bc->tin); |
1da177e4 LT |
2015 | /* Changing baud in mid-stream transmission can be wonderful */ |
2016 | /* --------------------------------------------------------------- | |
2017 | Flush current transmit buffer by setting cmdTail pointer (tout) | |
2018 | to cmdHead pointer (tin). Hopefully the transmit buffer is empty. | |
2019 | ----------------------------------------------------------------- */ | |
1da177e4 LT |
2020 | fepcmd(ch, STOUT, (unsigned) cmdHead, 0, 0, 0); |
2021 | mval = 0; | |
f2cf8e25 | 2022 | } else { /* Begin CBAUD not detected */ |
1da177e4 LT |
2023 | /* ------------------------------------------------------------------- |
2024 | c_cflags have changed but that change had nothing to do with BAUD. | |
2025 | Propagate the change to the card. | |
2026 | ---------------------------------------------------------------------- */ | |
1da177e4 | 2027 | cflag = termios2digi_c(ch, ts->c_cflag); |
f2cf8e25 | 2028 | if (cflag != ch->fepcflag) { |
1da177e4 LT |
2029 | ch->fepcflag = cflag; |
2030 | /* Set baud rate, char size, stop bits, parity */ | |
2031 | fepcmd(ch, SETCTRLFLAGS, (unsigned) cflag, 0, 0, 0); | |
2032 | } | |
1da177e4 LT |
2033 | /* ---------------------------------------------------------------- |
2034 | If the user has not forced CLOCAL and if the device is not a | |
2035 | CALLOUT device (Which is always CLOCAL) we set flags such that | |
2036 | the driver will wait on carrier detect. | |
2037 | ------------------------------------------------------------------- */ | |
1da177e4 | 2038 | if (ts->c_cflag & CLOCAL) |
1da177e4 | 2039 | ch->asyncflags &= ~ASYNC_CHECK_CD; |
1da177e4 | 2040 | else |
1da177e4 | 2041 | ch->asyncflags |= ASYNC_CHECK_CD; |
1da177e4 | 2042 | mval = ch->m_dtr | ch->m_rts; |
1da177e4 | 2043 | } /* End CBAUD not detected */ |
1da177e4 | 2044 | iflag = termios2digi_i(ch, ts->c_iflag); |
1da177e4 | 2045 | /* Check input mode flags */ |
f2cf8e25 | 2046 | if (iflag != ch->fepiflag) { |
1da177e4 | 2047 | ch->fepiflag = iflag; |
1da177e4 LT |
2048 | /* --------------------------------------------------------------- |
2049 | Command sets channels iflag structure on the board. Such things | |
2050 | as input soft flow control, handling of parity errors, and | |
2051 | break handling are all set here. | |
2052 | ------------------------------------------------------------------- */ | |
1da177e4 LT |
2053 | /* break handling, parity handling, input stripping, flow control chars */ |
2054 | fepcmd(ch, SETIFLAGS, (unsigned int) ch->fepiflag, 0, 0, 0); | |
2055 | } | |
1da177e4 LT |
2056 | /* --------------------------------------------------------------- |
2057 | Set the board mint value for this channel. This will cause hardware | |
2058 | events to be generated each time the DCD signal (Described in mint) | |
2059 | changes. | |
2060 | ------------------------------------------------------------------- */ | |
f2cf8e25 | 2061 | writeb(ch->dcd, &bc->mint); |
1da177e4 LT |
2062 | if ((ts->c_cflag & CLOCAL) || (ch->digiext.digi_flags & DIGI_FORCEDCD)) |
2063 | if (ch->digiext.digi_flags & DIGI_FORCEDCD) | |
f2cf8e25 AC |
2064 | writeb(0, &bc->mint); |
2065 | ch->imodem = readb(&bc->mstat); | |
1da177e4 | 2066 | hflow = termios2digi_h(ch, ts->c_cflag); |
f2cf8e25 | 2067 | if (hflow != ch->hflow) { |
1da177e4 | 2068 | ch->hflow = hflow; |
1da177e4 LT |
2069 | /* -------------------------------------------------------------- |
2070 | Hard flow control has been selected but the board is not | |
2071 | using it. Activate hard flow control now. | |
2072 | ----------------------------------------------------------------- */ | |
1da177e4 LT |
2073 | fepcmd(ch, SETHFLOW, hflow, 0xff, 0, 1); |
2074 | } | |
1da177e4 LT |
2075 | mval ^= ch->modemfake & (mval ^ ch->modem); |
2076 | ||
f2cf8e25 | 2077 | if (ch->omodem ^ mval) { |
1da177e4 | 2078 | ch->omodem = mval; |
1da177e4 LT |
2079 | /* -------------------------------------------------------------- |
2080 | The below command sets the DTR and RTS mstat structure. If | |
2081 | hard flow control is NOT active these changes will drive the | |
2082 | output of the actual DTR and RTS lines. If hard flow control | |
2083 | is active, the changes will be saved in the mstat structure and | |
2084 | only asserted when hard flow control is turned off. | |
2085 | ----------------------------------------------------------------- */ | |
2086 | ||
2087 | /* First reset DTR & RTS; then set them */ | |
2088 | fepcmd(ch, SETMODEM, 0, ((ch->m_dtr)|(ch->m_rts)), 0, 1); | |
2089 | fepcmd(ch, SETMODEM, mval, 0, 0, 1); | |
1da177e4 | 2090 | } |
f2cf8e25 | 2091 | if (ch->startc != ch->fepstartc || ch->stopc != ch->fepstopc) { |
1da177e4 LT |
2092 | ch->fepstartc = ch->startc; |
2093 | ch->fepstopc = ch->stopc; | |
1da177e4 LT |
2094 | /* ------------------------------------------------------------ |
2095 | The XON / XOFF characters have changed; propagate these | |
2096 | changes to the card. | |
2097 | --------------------------------------------------------------- */ | |
1da177e4 LT |
2098 | fepcmd(ch, SONOFFC, ch->fepstartc, ch->fepstopc, 0, 1); |
2099 | } | |
f2cf8e25 | 2100 | if (ch->startca != ch->fepstartca || ch->stopca != ch->fepstopca) { |
1da177e4 LT |
2101 | ch->fepstartca = ch->startca; |
2102 | ch->fepstopca = ch->stopca; | |
1da177e4 LT |
2103 | /* --------------------------------------------------------------- |
2104 | Similar to the above, this time the auxilarly XON / XOFF | |
2105 | characters have changed; propagate these changes to the card. | |
2106 | ------------------------------------------------------------------ */ | |
1da177e4 LT |
2107 | fepcmd(ch, SAUXONOFFC, ch->fepstartca, ch->fepstopca, 0, 1); |
2108 | } | |
1da177e4 LT |
2109 | } /* End epcaparam */ |
2110 | ||
2111 | /* --------------------- Begin receive_data ----------------------- */ | |
f2cf8e25 | 2112 | /* Caller holds lock */ |
1da177e4 LT |
2113 | static void receive_data(struct channel *ch) |
2114 | { /* Begin receive_data */ | |
2115 | ||
2116 | unchar *rptr; | |
606d099c | 2117 | struct ktermios *ts = NULL; |
1da177e4 | 2118 | struct tty_struct *tty; |
bc9a5154 | 2119 | struct board_chan __iomem *bc; |
f2cf8e25 AC |
2120 | int dataToRead, wrapgap, bytesAvailable; |
2121 | unsigned int tail, head; | |
1da177e4 | 2122 | unsigned int wrapmask; |
1da177e4 | 2123 | |
1da177e4 LT |
2124 | /* --------------------------------------------------------------- |
2125 | This routine is called by doint when a receive data event | |
2126 | has taken place. | |
2127 | ------------------------------------------------------------------- */ | |
2128 | ||
2129 | globalwinon(ch); | |
1da177e4 LT |
2130 | if (ch->statusflags & RXSTOPPED) |
2131 | return; | |
1da177e4 LT |
2132 | tty = ch->tty; |
2133 | if (tty) | |
2134 | ts = tty->termios; | |
1da177e4 | 2135 | bc = ch->brdchan; |
f2cf8e25 | 2136 | BUG_ON(!bc); |
1da177e4 LT |
2137 | wrapmask = ch->rxbufsize - 1; |
2138 | ||
2139 | /* --------------------------------------------------------------------- | |
2140 | Get the head and tail pointers to the receiver queue. Wrap the | |
2141 | head pointer if it has reached the end of the buffer. | |
2142 | ------------------------------------------------------------------------ */ | |
f2cf8e25 | 2143 | head = readw(&bc->rin); |
1da177e4 | 2144 | head &= wrapmask; |
f2cf8e25 | 2145 | tail = readw(&bc->rout) & wrapmask; |
1da177e4 LT |
2146 | |
2147 | bytesAvailable = (head - tail) & wrapmask; | |
1da177e4 LT |
2148 | if (bytesAvailable == 0) |
2149 | return; | |
2150 | ||
2151 | /* ------------------------------------------------------------------ | |
2152 | If CREAD bit is off or device not open, set TX tail to head | |
2153 | --------------------------------------------------------------------- */ | |
2154 | ||
f2cf8e25 | 2155 | if (!tty || !ts || !(ts->c_cflag & CREAD)) { |
bc9a5154 | 2156 | writew(head, &bc->rout); |
1da177e4 LT |
2157 | return; |
2158 | } | |
2159 | ||
33f0f88f | 2160 | if (tty_buffer_request_room(tty, bytesAvailable + 1) == 0) |
1da177e4 LT |
2161 | return; |
2162 | ||
f2cf8e25 AC |
2163 | if (readb(&bc->orun)) { |
2164 | writeb(0, &bc->orun); | |
2165 | printk(KERN_WARNING "epca; overrun! DigiBoard device %s\n",tty->name); | |
33f0f88f | 2166 | tty_insert_flip_char(tty, 0, TTY_OVERRUN); |
1da177e4 | 2167 | } |
1da177e4 | 2168 | rxwinon(ch); |
f2cf8e25 | 2169 | while (bytesAvailable > 0) { /* Begin while there is data on the card */ |
1da177e4 | 2170 | wrapgap = (head >= tail) ? head - tail : ch->rxbufsize - tail; |
1da177e4 LT |
2171 | /* --------------------------------------------------------------- |
2172 | Even if head has wrapped around only report the amount of | |
2173 | data to be equal to the size - tail. Remember memcpy can't | |
2174 | automaticly wrap around the receive buffer. | |
2175 | ----------------------------------------------------------------- */ | |
1da177e4 | 2176 | dataToRead = (wrapgap < bytesAvailable) ? wrapgap : bytesAvailable; |
1da177e4 LT |
2177 | /* -------------------------------------------------------------- |
2178 | Make sure we don't overflow the buffer | |
2179 | ----------------------------------------------------------------- */ | |
33f0f88f | 2180 | dataToRead = tty_prepare_flip_string(tty, &rptr, dataToRead); |
1da177e4 LT |
2181 | if (dataToRead == 0) |
2182 | break; | |
1da177e4 LT |
2183 | /* --------------------------------------------------------------- |
2184 | Move data read from our card into the line disciplines buffer | |
2185 | for translation if necessary. | |
2186 | ------------------------------------------------------------------ */ | |
f2cf8e25 | 2187 | memcpy_fromio(rptr, ch->rxptr + tail, dataToRead); |
1da177e4 LT |
2188 | tail = (tail + dataToRead) & wrapmask; |
2189 | bytesAvailable -= dataToRead; | |
1da177e4 | 2190 | } /* End while there is data on the card */ |
1da177e4 | 2191 | globalwinon(ch); |
f2cf8e25 | 2192 | writew(tail, &bc->rout); |
1da177e4 LT |
2193 | /* Must be called with global data */ |
2194 | tty_schedule_flip(ch->tty); | |
2195 | return; | |
1da177e4 LT |
2196 | } /* End receive_data */ |
2197 | ||
2198 | static int info_ioctl(struct tty_struct *tty, struct file * file, | |
2199 | unsigned int cmd, unsigned long arg) | |
2200 | { | |
2201 | switch (cmd) | |
2202 | { /* Begin switch cmd */ | |
1da177e4 LT |
2203 | case DIGI_GETINFO: |
2204 | { /* Begin case DIGI_GETINFO */ | |
1da177e4 LT |
2205 | struct digi_info di ; |
2206 | int brd; | |
2207 | ||
f2cf8e25 AC |
2208 | if(get_user(brd, (unsigned int __user *)arg)) |
2209 | return -EFAULT; | |
2210 | if (brd < 0 || brd >= num_cards || num_cards == 0) | |
2211 | return -ENODEV; | |
1da177e4 LT |
2212 | |
2213 | memset(&di, 0, sizeof(di)); | |
2214 | ||
2215 | di.board = brd ; | |
2216 | di.status = boards[brd].status; | |
2217 | di.type = boards[brd].type ; | |
2218 | di.numports = boards[brd].numports ; | |
f2cf8e25 AC |
2219 | /* Legacy fixups - just move along nothing to see */ |
2220 | di.port = (unsigned char *)boards[brd].port ; | |
2221 | di.membase = (unsigned char *)boards[brd].membase ; | |
1da177e4 LT |
2222 | |
2223 | if (copy_to_user((void __user *)arg, &di, sizeof (di))) | |
2224 | return -EFAULT; | |
2225 | break; | |
2226 | ||
2227 | } /* End case DIGI_GETINFO */ | |
2228 | ||
2229 | case DIGI_POLLER: | |
2230 | { /* Begin case DIGI_POLLER */ | |
2231 | ||
2232 | int brd = arg & 0xff000000 >> 16 ; | |
2233 | unsigned char state = arg & 0xff ; | |
2234 | ||
f2cf8e25 AC |
2235 | if (brd < 0 || brd >= num_cards) { |
2236 | printk(KERN_ERR "epca: DIGI POLLER : brd not valid!\n"); | |
1da177e4 LT |
2237 | return (-ENODEV); |
2238 | } | |
1da177e4 LT |
2239 | digi_poller_inhibited = state ; |
2240 | break ; | |
1da177e4 LT |
2241 | } /* End case DIGI_POLLER */ |
2242 | ||
2243 | case DIGI_INIT: | |
2244 | { /* Begin case DIGI_INIT */ | |
1da177e4 LT |
2245 | /* ------------------------------------------------------------ |
2246 | This call is made by the apps to complete the initilization | |
2247 | of the board(s). This routine is responsible for setting | |
2248 | the card to its initial state and setting the drivers control | |
2249 | fields to the sutianle settings for the card in question. | |
2250 | ---------------------------------------------------------------- */ | |
1da177e4 LT |
2251 | int crd ; |
2252 | for (crd = 0; crd < num_cards; crd++) | |
2253 | post_fep_init (crd); | |
1da177e4 | 2254 | break ; |
1da177e4 | 2255 | } /* End case DIGI_INIT */ |
1da177e4 | 2256 | default: |
f2cf8e25 | 2257 | return -ENOTTY; |
1da177e4 LT |
2258 | } /* End switch cmd */ |
2259 | return (0) ; | |
2260 | } | |
2261 | /* --------------------- Begin pc_ioctl ----------------------- */ | |
2262 | ||
2263 | static int pc_tiocmget(struct tty_struct *tty, struct file *file) | |
2264 | { | |
2265 | struct channel *ch = (struct channel *) tty->driver_data; | |
bc9a5154 | 2266 | struct board_chan __iomem *bc; |
1da177e4 LT |
2267 | unsigned int mstat, mflag = 0; |
2268 | unsigned long flags; | |
2269 | ||
2270 | if (ch) | |
2271 | bc = ch->brdchan; | |
2272 | else | |
f2cf8e25 | 2273 | return -EINVAL; |
1da177e4 | 2274 | |
f2cf8e25 | 2275 | spin_lock_irqsave(&epca_lock, flags); |
1da177e4 | 2276 | globalwinon(ch); |
f2cf8e25 | 2277 | mstat = readb(&bc->mstat); |
1da177e4 | 2278 | memoff(ch); |
f2cf8e25 | 2279 | spin_unlock_irqrestore(&epca_lock, flags); |
1da177e4 LT |
2280 | |
2281 | if (mstat & ch->m_dtr) | |
2282 | mflag |= TIOCM_DTR; | |
1da177e4 LT |
2283 | if (mstat & ch->m_rts) |
2284 | mflag |= TIOCM_RTS; | |
1da177e4 LT |
2285 | if (mstat & ch->m_cts) |
2286 | mflag |= TIOCM_CTS; | |
1da177e4 LT |
2287 | if (mstat & ch->dsr) |
2288 | mflag |= TIOCM_DSR; | |
1da177e4 LT |
2289 | if (mstat & ch->m_ri) |
2290 | mflag |= TIOCM_RI; | |
1da177e4 LT |
2291 | if (mstat & ch->dcd) |
2292 | mflag |= TIOCM_CD; | |
1da177e4 LT |
2293 | return mflag; |
2294 | } | |
2295 | ||
2296 | static int pc_tiocmset(struct tty_struct *tty, struct file *file, | |
2297 | unsigned int set, unsigned int clear) | |
2298 | { | |
2299 | struct channel *ch = (struct channel *) tty->driver_data; | |
2300 | unsigned long flags; | |
2301 | ||
f2cf8e25 AC |
2302 | if (!ch) |
2303 | return -EINVAL; | |
1da177e4 | 2304 | |
f2cf8e25 | 2305 | spin_lock_irqsave(&epca_lock, flags); |
1da177e4 LT |
2306 | /* |
2307 | * I think this modemfake stuff is broken. It doesn't | |
2308 | * correctly reflect the behaviour desired by the TIOCM* | |
2309 | * ioctls. Therefore this is probably broken. | |
2310 | */ | |
2311 | if (set & TIOCM_RTS) { | |
2312 | ch->modemfake |= ch->m_rts; | |
2313 | ch->modem |= ch->m_rts; | |
2314 | } | |
2315 | if (set & TIOCM_DTR) { | |
2316 | ch->modemfake |= ch->m_dtr; | |
2317 | ch->modem |= ch->m_dtr; | |
2318 | } | |
2319 | if (clear & TIOCM_RTS) { | |
2320 | ch->modemfake |= ch->m_rts; | |
2321 | ch->modem &= ~ch->m_rts; | |
2322 | } | |
2323 | if (clear & TIOCM_DTR) { | |
2324 | ch->modemfake |= ch->m_dtr; | |
2325 | ch->modem &= ~ch->m_dtr; | |
2326 | } | |
1da177e4 | 2327 | globalwinon(ch); |
1da177e4 LT |
2328 | /* -------------------------------------------------------------- |
2329 | The below routine generally sets up parity, baud, flow control | |
2330 | issues, etc.... It effect both control flags and input flags. | |
2331 | ------------------------------------------------------------------ */ | |
1da177e4 LT |
2332 | epcaparam(tty,ch); |
2333 | memoff(ch); | |
f2cf8e25 | 2334 | spin_unlock_irqrestore(&epca_lock, flags); |
1da177e4 LT |
2335 | return 0; |
2336 | } | |
2337 | ||
2338 | static int pc_ioctl(struct tty_struct *tty, struct file * file, | |
2339 | unsigned int cmd, unsigned long arg) | |
2340 | { /* Begin pc_ioctl */ | |
2341 | ||
2342 | digiflow_t dflow; | |
2343 | int retval; | |
2344 | unsigned long flags; | |
2345 | unsigned int mflag, mstat; | |
2346 | unsigned char startc, stopc; | |
bc9a5154 | 2347 | struct board_chan __iomem *bc; |
1da177e4 LT |
2348 | struct channel *ch = (struct channel *) tty->driver_data; |
2349 | void __user *argp = (void __user *)arg; | |
2350 | ||
2351 | if (ch) | |
2352 | bc = ch->brdchan; | |
2353 | else | |
f2cf8e25 | 2354 | return -EINVAL; |
1da177e4 LT |
2355 | |
2356 | /* ------------------------------------------------------------------- | |
2357 | For POSIX compliance we need to add more ioctls. See tty_ioctl.c | |
2358 | in /usr/src/linux/drivers/char for a good example. In particular | |
2359 | think about adding TCSETAF, TCSETAW, TCSETA, TCSETSF, TCSETSW, TCSETS. | |
2360 | ---------------------------------------------------------------------- */ | |
2361 | ||
2362 | switch (cmd) | |
2363 | { /* Begin switch cmd */ | |
1da177e4 | 2364 | case TCSBRK: /* SVID version: non-zero arg --> no break */ |
1da177e4 LT |
2365 | retval = tty_check_change(tty); |
2366 | if (retval) | |
2367 | return retval; | |
1da177e4 | 2368 | /* Setup an event to indicate when the transmit buffer empties */ |
f2cf8e25 | 2369 | spin_lock_irqsave(&epca_lock, flags); |
1da177e4 | 2370 | setup_empty_event(tty,ch); |
f2cf8e25 | 2371 | spin_unlock_irqrestore(&epca_lock, flags); |
1da177e4 LT |
2372 | tty_wait_until_sent(tty, 0); |
2373 | if (!arg) | |
2374 | digi_send_break(ch, HZ/4); /* 1/4 second */ | |
2375 | return 0; | |
1da177e4 | 2376 | case TCSBRKP: /* support for POSIX tcsendbreak() */ |
1da177e4 LT |
2377 | retval = tty_check_change(tty); |
2378 | if (retval) | |
2379 | return retval; | |
2380 | ||
2381 | /* Setup an event to indicate when the transmit buffer empties */ | |
f2cf8e25 | 2382 | spin_lock_irqsave(&epca_lock, flags); |
1da177e4 | 2383 | setup_empty_event(tty,ch); |
f2cf8e25 | 2384 | spin_unlock_irqrestore(&epca_lock, flags); |
1da177e4 LT |
2385 | tty_wait_until_sent(tty, 0); |
2386 | digi_send_break(ch, arg ? arg*(HZ/10) : HZ/4); | |
2387 | return 0; | |
1da177e4 LT |
2388 | case TIOCGSOFTCAR: |
2389 | if (put_user(C_CLOCAL(tty)?1:0, (unsigned long __user *)arg)) | |
2390 | return -EFAULT; | |
2391 | return 0; | |
1da177e4 LT |
2392 | case TIOCSSOFTCAR: |
2393 | { | |
2394 | unsigned int value; | |
2395 | ||
2396 | if (get_user(value, (unsigned __user *)argp)) | |
2397 | return -EFAULT; | |
2398 | tty->termios->c_cflag = | |
2399 | ((tty->termios->c_cflag & ~CLOCAL) | | |
2400 | (value ? CLOCAL : 0)); | |
2401 | return 0; | |
2402 | } | |
1da177e4 LT |
2403 | case TIOCMODG: |
2404 | mflag = pc_tiocmget(tty, file); | |
2405 | if (put_user(mflag, (unsigned long __user *)argp)) | |
2406 | return -EFAULT; | |
2407 | break; | |
1da177e4 LT |
2408 | case TIOCMODS: |
2409 | if (get_user(mstat, (unsigned __user *)argp)) | |
2410 | return -EFAULT; | |
2411 | return pc_tiocmset(tty, file, mstat, ~mstat); | |
1da177e4 | 2412 | case TIOCSDTR: |
f2cf8e25 | 2413 | spin_lock_irqsave(&epca_lock, flags); |
1da177e4 | 2414 | ch->omodem |= ch->m_dtr; |
1da177e4 LT |
2415 | globalwinon(ch); |
2416 | fepcmd(ch, SETMODEM, ch->m_dtr, 0, 10, 1); | |
2417 | memoff(ch); | |
f2cf8e25 | 2418 | spin_unlock_irqrestore(&epca_lock, flags); |
1da177e4 LT |
2419 | break; |
2420 | ||
2421 | case TIOCCDTR: | |
f2cf8e25 | 2422 | spin_lock_irqsave(&epca_lock, flags); |
1da177e4 | 2423 | ch->omodem &= ~ch->m_dtr; |
1da177e4 LT |
2424 | globalwinon(ch); |
2425 | fepcmd(ch, SETMODEM, 0, ch->m_dtr, 10, 1); | |
2426 | memoff(ch); | |
f2cf8e25 | 2427 | spin_unlock_irqrestore(&epca_lock, flags); |
1da177e4 | 2428 | break; |
1da177e4 LT |
2429 | case DIGI_GETA: |
2430 | if (copy_to_user(argp, &ch->digiext, sizeof(digi_t))) | |
2431 | return -EFAULT; | |
2432 | break; | |
1da177e4 LT |
2433 | case DIGI_SETAW: |
2434 | case DIGI_SETAF: | |
f2cf8e25 | 2435 | if (cmd == DIGI_SETAW) { |
1da177e4 | 2436 | /* Setup an event to indicate when the transmit buffer empties */ |
f2cf8e25 | 2437 | spin_lock_irqsave(&epca_lock, flags); |
1da177e4 | 2438 | setup_empty_event(tty,ch); |
f2cf8e25 | 2439 | spin_unlock_irqrestore(&epca_lock, flags); |
1da177e4 | 2440 | tty_wait_until_sent(tty, 0); |
f2cf8e25 | 2441 | } else { |
1da177e4 LT |
2442 | /* ldisc lock already held in ioctl */ |
2443 | if (tty->ldisc.flush_buffer) | |
2444 | tty->ldisc.flush_buffer(tty); | |
2445 | } | |
1da177e4 | 2446 | /* Fall Thru */ |
1da177e4 LT |
2447 | case DIGI_SETA: |
2448 | if (copy_from_user(&ch->digiext, argp, sizeof(digi_t))) | |
2449 | return -EFAULT; | |
2450 | ||
f2cf8e25 | 2451 | if (ch->digiext.digi_flags & DIGI_ALTPIN) { |
1da177e4 LT |
2452 | ch->dcd = ch->m_dsr; |
2453 | ch->dsr = ch->m_dcd; | |
f2cf8e25 | 2454 | } else { |
1da177e4 LT |
2455 | ch->dcd = ch->m_dcd; |
2456 | ch->dsr = ch->m_dsr; | |
2457 | } | |
2458 | ||
f2cf8e25 | 2459 | spin_lock_irqsave(&epca_lock, flags); |
1da177e4 LT |
2460 | globalwinon(ch); |
2461 | ||
2462 | /* ----------------------------------------------------------------- | |
2463 | The below routine generally sets up parity, baud, flow control | |
2464 | issues, etc.... It effect both control flags and input flags. | |
2465 | ------------------------------------------------------------------- */ | |
2466 | ||
2467 | epcaparam(tty,ch); | |
2468 | memoff(ch); | |
f2cf8e25 | 2469 | spin_unlock_irqrestore(&epca_lock, flags); |
1da177e4 LT |
2470 | break; |
2471 | ||
2472 | case DIGI_GETFLOW: | |
2473 | case DIGI_GETAFLOW: | |
f2cf8e25 | 2474 | spin_lock_irqsave(&epca_lock, flags); |
1da177e4 | 2475 | globalwinon(ch); |
f2cf8e25 AC |
2476 | if (cmd == DIGI_GETFLOW) { |
2477 | dflow.startc = readb(&bc->startc); | |
2478 | dflow.stopc = readb(&bc->stopc); | |
2479 | } else { | |
2480 | dflow.startc = readb(&bc->startca); | |
2481 | dflow.stopc = readb(&bc->stopca); | |
1da177e4 LT |
2482 | } |
2483 | memoff(ch); | |
f2cf8e25 | 2484 | spin_unlock_irqrestore(&epca_lock, flags); |
1da177e4 LT |
2485 | |
2486 | if (copy_to_user(argp, &dflow, sizeof(dflow))) | |
2487 | return -EFAULT; | |
2488 | break; | |
2489 | ||
2490 | case DIGI_SETAFLOW: | |
2491 | case DIGI_SETFLOW: | |
f2cf8e25 | 2492 | if (cmd == DIGI_SETFLOW) { |
1da177e4 LT |
2493 | startc = ch->startc; |
2494 | stopc = ch->stopc; | |
f2cf8e25 | 2495 | } else { |
1da177e4 LT |
2496 | startc = ch->startca; |
2497 | stopc = ch->stopca; | |
2498 | } | |
2499 | ||
2500 | if (copy_from_user(&dflow, argp, sizeof(dflow))) | |
2501 | return -EFAULT; | |
2502 | ||
f2cf8e25 AC |
2503 | if (dflow.startc != startc || dflow.stopc != stopc) { /* Begin if setflow toggled */ |
2504 | spin_lock_irqsave(&epca_lock, flags); | |
1da177e4 LT |
2505 | globalwinon(ch); |
2506 | ||
f2cf8e25 | 2507 | if (cmd == DIGI_SETFLOW) { |
1da177e4 LT |
2508 | ch->fepstartc = ch->startc = dflow.startc; |
2509 | ch->fepstopc = ch->stopc = dflow.stopc; | |
2510 | fepcmd(ch, SONOFFC, ch->fepstartc, ch->fepstopc, 0, 1); | |
f2cf8e25 | 2511 | } else { |
1da177e4 LT |
2512 | ch->fepstartca = ch->startca = dflow.startc; |
2513 | ch->fepstopca = ch->stopca = dflow.stopc; | |
2514 | fepcmd(ch, SAUXONOFFC, ch->fepstartca, ch->fepstopca, 0, 1); | |
2515 | } | |
2516 | ||
f2cf8e25 | 2517 | if (ch->statusflags & TXSTOPPED) |
1da177e4 LT |
2518 | pc_start(tty); |
2519 | ||
2520 | memoff(ch); | |
f2cf8e25 | 2521 | spin_unlock_irqrestore(&epca_lock, flags); |
1da177e4 LT |
2522 | } /* End if setflow toggled */ |
2523 | break; | |
1da177e4 LT |
2524 | default: |
2525 | return -ENOIOCTLCMD; | |
1da177e4 | 2526 | } /* End switch cmd */ |
1da177e4 | 2527 | return 0; |
1da177e4 LT |
2528 | } /* End pc_ioctl */ |
2529 | ||
2530 | /* --------------------- Begin pc_set_termios ----------------------- */ | |
2531 | ||
606d099c | 2532 | static void pc_set_termios(struct tty_struct *tty, struct ktermios *old_termios) |
1da177e4 LT |
2533 | { /* Begin pc_set_termios */ |
2534 | ||
2535 | struct channel *ch; | |
2536 | unsigned long flags; | |
1da177e4 LT |
2537 | /* --------------------------------------------------------- |
2538 | verifyChannel returns the channel from the tty struct | |
2539 | if it is valid. This serves as a sanity check. | |
2540 | ------------------------------------------------------------- */ | |
f2cf8e25 AC |
2541 | if ((ch = verifyChannel(tty)) != NULL) { /* Begin if channel valid */ |
2542 | spin_lock_irqsave(&epca_lock, flags); | |
1da177e4 LT |
2543 | globalwinon(ch); |
2544 | epcaparam(tty, ch); | |
2545 | memoff(ch); | |
f2cf8e25 | 2546 | spin_unlock_irqrestore(&epca_lock, flags); |
1da177e4 LT |
2547 | |
2548 | if ((old_termios->c_cflag & CRTSCTS) && | |
2549 | ((tty->termios->c_cflag & CRTSCTS) == 0)) | |
2550 | tty->hw_stopped = 0; | |
2551 | ||
2552 | if (!(old_termios->c_cflag & CLOCAL) && | |
2553 | (tty->termios->c_cflag & CLOCAL)) | |
2554 | wake_up_interruptible(&ch->open_wait); | |
2555 | ||
1da177e4 LT |
2556 | } /* End if channel valid */ |
2557 | ||
2558 | } /* End pc_set_termios */ | |
2559 | ||
2560 | /* --------------------- Begin do_softint ----------------------- */ | |
2561 | ||
c4028958 | 2562 | static void do_softint(struct work_struct *work) |
1da177e4 | 2563 | { /* Begin do_softint */ |
c4028958 | 2564 | struct channel *ch = container_of(work, struct channel, tqueue); |
1da177e4 | 2565 | /* Called in response to a modem change event */ |
f2cf8e25 | 2566 | if (ch && ch->magic == EPCA_MAGIC) { /* Begin EPCA_MAGIC */ |
1da177e4 LT |
2567 | struct tty_struct *tty = ch->tty; |
2568 | ||
f2cf8e25 AC |
2569 | if (tty && tty->driver_data) { |
2570 | if (test_and_clear_bit(EPCA_EVENT_HANGUP, &ch->event)) { /* Begin if clear_bit */ | |
1da177e4 LT |
2571 | tty_hangup(tty); /* FIXME: module removal race here - AKPM */ |
2572 | wake_up_interruptible(&ch->open_wait); | |
2573 | ch->asyncflags &= ~ASYNC_NORMAL_ACTIVE; | |
1da177e4 LT |
2574 | } /* End if clear_bit */ |
2575 | } | |
1da177e4 LT |
2576 | } /* End EPCA_MAGIC */ |
2577 | } /* End do_softint */ | |
2578 | ||
2579 | /* ------------------------------------------------------------ | |
2580 | pc_stop and pc_start provide software flow control to the | |
2581 | routine and the pc_ioctl routine. | |
2582 | ---------------------------------------------------------------- */ | |
2583 | ||
2584 | /* --------------------- Begin pc_stop ----------------------- */ | |
2585 | ||
2586 | static void pc_stop(struct tty_struct *tty) | |
2587 | { /* Begin pc_stop */ | |
2588 | ||
2589 | struct channel *ch; | |
2590 | unsigned long flags; | |
1da177e4 LT |
2591 | /* --------------------------------------------------------- |
2592 | verifyChannel returns the channel from the tty struct | |
2593 | if it is valid. This serves as a sanity check. | |
2594 | ------------------------------------------------------------- */ | |
f2cf8e25 AC |
2595 | if ((ch = verifyChannel(tty)) != NULL) { /* Begin if valid channel */ |
2596 | spin_lock_irqsave(&epca_lock, flags); | |
2597 | if ((ch->statusflags & TXSTOPPED) == 0) { /* Begin if transmit stop requested */ | |
1da177e4 | 2598 | globalwinon(ch); |
1da177e4 | 2599 | /* STOP transmitting now !! */ |
1da177e4 | 2600 | fepcmd(ch, PAUSETX, 0, 0, 0, 0); |
1da177e4 LT |
2601 | ch->statusflags |= TXSTOPPED; |
2602 | memoff(ch); | |
1da177e4 | 2603 | } /* End if transmit stop requested */ |
f2cf8e25 | 2604 | spin_unlock_irqrestore(&epca_lock, flags); |
1da177e4 | 2605 | } /* End if valid channel */ |
1da177e4 LT |
2606 | } /* End pc_stop */ |
2607 | ||
2608 | /* --------------------- Begin pc_start ----------------------- */ | |
2609 | ||
2610 | static void pc_start(struct tty_struct *tty) | |
2611 | { /* Begin pc_start */ | |
1da177e4 | 2612 | struct channel *ch; |
1da177e4 LT |
2613 | /* --------------------------------------------------------- |
2614 | verifyChannel returns the channel from the tty struct | |
2615 | if it is valid. This serves as a sanity check. | |
2616 | ------------------------------------------------------------- */ | |
f2cf8e25 | 2617 | if ((ch = verifyChannel(tty)) != NULL) { /* Begin if channel valid */ |
1da177e4 | 2618 | unsigned long flags; |
f2cf8e25 | 2619 | spin_lock_irqsave(&epca_lock, flags); |
1da177e4 | 2620 | /* Just in case output was resumed because of a change in Digi-flow */ |
f2cf8e25 | 2621 | if (ch->statusflags & TXSTOPPED) { /* Begin transmit resume requested */ |
bc9a5154 | 2622 | struct board_chan __iomem *bc; |
1da177e4 LT |
2623 | globalwinon(ch); |
2624 | bc = ch->brdchan; | |
2625 | if (ch->statusflags & LOWWAIT) | |
f2cf8e25 | 2626 | writeb(1, &bc->ilow); |
1da177e4 | 2627 | /* Okay, you can start transmitting again... */ |
1da177e4 | 2628 | fepcmd(ch, RESUMETX, 0, 0, 0, 0); |
1da177e4 LT |
2629 | ch->statusflags &= ~TXSTOPPED; |
2630 | memoff(ch); | |
1da177e4 | 2631 | } /* End transmit resume requested */ |
f2cf8e25 | 2632 | spin_unlock_irqrestore(&epca_lock, flags); |
1da177e4 | 2633 | } /* End if channel valid */ |
1da177e4 LT |
2634 | } /* End pc_start */ |
2635 | ||
2636 | /* ------------------------------------------------------------------ | |
2637 | The below routines pc_throttle and pc_unthrottle are used | |
2638 | to slow (And resume) the receipt of data into the kernels | |
2639 | receive buffers. The exact occurrence of this depends on the | |
2640 | size of the kernels receive buffer and what the 'watermarks' | |
2641 | are set to for that buffer. See the n_ttys.c file for more | |
2642 | details. | |
2643 | ______________________________________________________________________ */ | |
2644 | /* --------------------- Begin throttle ----------------------- */ | |
2645 | ||
2646 | static void pc_throttle(struct tty_struct * tty) | |
2647 | { /* Begin pc_throttle */ | |
1da177e4 LT |
2648 | struct channel *ch; |
2649 | unsigned long flags; | |
1da177e4 LT |
2650 | /* --------------------------------------------------------- |
2651 | verifyChannel returns the channel from the tty struct | |
2652 | if it is valid. This serves as a sanity check. | |
2653 | ------------------------------------------------------------- */ | |
f2cf8e25 AC |
2654 | if ((ch = verifyChannel(tty)) != NULL) { /* Begin if channel valid */ |
2655 | spin_lock_irqsave(&epca_lock, flags); | |
2656 | if ((ch->statusflags & RXSTOPPED) == 0) { | |
1da177e4 LT |
2657 | globalwinon(ch); |
2658 | fepcmd(ch, PAUSERX, 0, 0, 0, 0); | |
1da177e4 LT |
2659 | ch->statusflags |= RXSTOPPED; |
2660 | memoff(ch); | |
2661 | } | |
f2cf8e25 | 2662 | spin_unlock_irqrestore(&epca_lock, flags); |
1da177e4 | 2663 | } /* End if channel valid */ |
1da177e4 LT |
2664 | } /* End pc_throttle */ |
2665 | ||
2666 | /* --------------------- Begin unthrottle ----------------------- */ | |
2667 | ||
2668 | static void pc_unthrottle(struct tty_struct *tty) | |
2669 | { /* Begin pc_unthrottle */ | |
1da177e4 LT |
2670 | struct channel *ch; |
2671 | unsigned long flags; | |
1da177e4 LT |
2672 | /* --------------------------------------------------------- |
2673 | verifyChannel returns the channel from the tty struct | |
2674 | if it is valid. This serves as a sanity check. | |
2675 | ------------------------------------------------------------- */ | |
f2cf8e25 | 2676 | if ((ch = verifyChannel(tty)) != NULL) { /* Begin if channel valid */ |
1da177e4 | 2677 | /* Just in case output was resumed because of a change in Digi-flow */ |
f2cf8e25 AC |
2678 | spin_lock_irqsave(&epca_lock, flags); |
2679 | if (ch->statusflags & RXSTOPPED) { | |
1da177e4 | 2680 | globalwinon(ch); |
1da177e4 | 2681 | fepcmd(ch, RESUMERX, 0, 0, 0, 0); |
1da177e4 LT |
2682 | ch->statusflags &= ~RXSTOPPED; |
2683 | memoff(ch); | |
2684 | } | |
f2cf8e25 | 2685 | spin_unlock_irqrestore(&epca_lock, flags); |
1da177e4 | 2686 | } /* End if channel valid */ |
1da177e4 LT |
2687 | } /* End pc_unthrottle */ |
2688 | ||
2689 | /* --------------------- Begin digi_send_break ----------------------- */ | |
2690 | ||
2691 | void digi_send_break(struct channel *ch, int msec) | |
2692 | { /* Begin digi_send_break */ | |
1da177e4 LT |
2693 | unsigned long flags; |
2694 | ||
f2cf8e25 | 2695 | spin_lock_irqsave(&epca_lock, flags); |
1da177e4 | 2696 | globalwinon(ch); |
1da177e4 LT |
2697 | /* -------------------------------------------------------------------- |
2698 | Maybe I should send an infinite break here, schedule() for | |
2699 | msec amount of time, and then stop the break. This way, | |
2700 | the user can't screw up the FEP by causing digi_send_break() | |
2701 | to be called (i.e. via an ioctl()) more than once in msec amount | |
2702 | of time. Try this for now... | |
2703 | ------------------------------------------------------------------------ */ | |
1da177e4 LT |
2704 | fepcmd(ch, SENDBREAK, msec, 0, 10, 0); |
2705 | memoff(ch); | |
f2cf8e25 | 2706 | spin_unlock_irqrestore(&epca_lock, flags); |
1da177e4 LT |
2707 | } /* End digi_send_break */ |
2708 | ||
2709 | /* --------------------- Begin setup_empty_event ----------------------- */ | |
2710 | ||
f2cf8e25 AC |
2711 | /* Caller MUST hold the lock */ |
2712 | ||
1da177e4 LT |
2713 | static void setup_empty_event(struct tty_struct *tty, struct channel *ch) |
2714 | { /* Begin setup_empty_event */ | |
2715 | ||
bc9a5154 | 2716 | struct board_chan __iomem *bc = ch->brdchan; |
1da177e4 | 2717 | |
1da177e4 LT |
2718 | globalwinon(ch); |
2719 | ch->statusflags |= EMPTYWAIT; | |
1da177e4 LT |
2720 | /* ------------------------------------------------------------------ |
2721 | When set the iempty flag request a event to be generated when the | |
2722 | transmit buffer is empty (If there is no BREAK in progress). | |
2723 | --------------------------------------------------------------------- */ | |
f2cf8e25 | 2724 | writeb(1, &bc->iempty); |
1da177e4 | 2725 | memoff(ch); |
1da177e4 LT |
2726 | } /* End setup_empty_event */ |
2727 | ||
1da177e4 LT |
2728 | /* ---------------------- Begin epca_setup -------------------------- */ |
2729 | void epca_setup(char *str, int *ints) | |
2730 | { /* Begin epca_setup */ | |
1da177e4 LT |
2731 | struct board_info board; |
2732 | int index, loop, last; | |
2733 | char *temp, *t2; | |
2734 | unsigned len; | |
2735 | ||
2736 | /* ---------------------------------------------------------------------- | |
2737 | If this routine looks a little strange it is because it is only called | |
2738 | if a LILO append command is given to boot the kernel with parameters. | |
2739 | In this way, we can provide the user a method of changing his board | |
2740 | configuration without rebuilding the kernel. | |
2741 | ----------------------------------------------------------------------- */ | |
2742 | if (!liloconfig) | |
2743 | liloconfig = 1; | |
2744 | ||
2745 | memset(&board, 0, sizeof(board)); | |
2746 | ||
2747 | /* Assume the data is int first, later we can change it */ | |
2748 | /* I think that array position 0 of ints holds the number of args */ | |
2749 | for (last = 0, index = 1; index <= ints[0]; index++) | |
2750 | switch(index) | |
2751 | { /* Begin parse switch */ | |
1da177e4 LT |
2752 | case 1: |
2753 | board.status = ints[index]; | |
1da177e4 LT |
2754 | /* --------------------------------------------------------- |
2755 | We check for 2 (As opposed to 1; because 2 is a flag | |
2756 | instructing the driver to ignore epcaconfig.) For this | |
2757 | reason we check for 2. | |
2758 | ------------------------------------------------------------ */ | |
f2cf8e25 | 2759 | if (board.status == 2) { /* Begin ignore epcaconfig as well as lilo cmd line */ |
1da177e4 LT |
2760 | nbdevs = 0; |
2761 | num_cards = 0; | |
2762 | return; | |
2763 | } /* End ignore epcaconfig as well as lilo cmd line */ | |
2764 | ||
f2cf8e25 AC |
2765 | if (board.status > 2) { |
2766 | printk(KERN_ERR "epca_setup: Invalid board status 0x%x\n", board.status); | |
1da177e4 LT |
2767 | invalid_lilo_config = 1; |
2768 | setup_error_code |= INVALID_BOARD_STATUS; | |
2769 | return; | |
2770 | } | |
2771 | last = index; | |
2772 | break; | |
1da177e4 LT |
2773 | case 2: |
2774 | board.type = ints[index]; | |
f2cf8e25 AC |
2775 | if (board.type >= PCIXEM) { |
2776 | printk(KERN_ERR "epca_setup: Invalid board type 0x%x\n", board.type); | |
1da177e4 LT |
2777 | invalid_lilo_config = 1; |
2778 | setup_error_code |= INVALID_BOARD_TYPE; | |
2779 | return; | |
2780 | } | |
2781 | last = index; | |
2782 | break; | |
1da177e4 LT |
2783 | case 3: |
2784 | board.altpin = ints[index]; | |
f2cf8e25 AC |
2785 | if (board.altpin > 1) { |
2786 | printk(KERN_ERR "epca_setup: Invalid board altpin 0x%x\n", board.altpin); | |
1da177e4 LT |
2787 | invalid_lilo_config = 1; |
2788 | setup_error_code |= INVALID_ALTPIN; | |
2789 | return; | |
2790 | } | |
2791 | last = index; | |
2792 | break; | |
2793 | ||
2794 | case 4: | |
2795 | board.numports = ints[index]; | |
f2cf8e25 AC |
2796 | if (board.numports < 2 || board.numports > 256) { |
2797 | printk(KERN_ERR "epca_setup: Invalid board numports 0x%x\n", board.numports); | |
1da177e4 LT |
2798 | invalid_lilo_config = 1; |
2799 | setup_error_code |= INVALID_NUM_PORTS; | |
2800 | return; | |
2801 | } | |
2802 | nbdevs += board.numports; | |
2803 | last = index; | |
2804 | break; | |
2805 | ||
2806 | case 5: | |
f2cf8e25 AC |
2807 | board.port = ints[index]; |
2808 | if (ints[index] <= 0) { | |
2809 | printk(KERN_ERR "epca_setup: Invalid io port 0x%x\n", (unsigned int)board.port); | |
1da177e4 LT |
2810 | invalid_lilo_config = 1; |
2811 | setup_error_code |= INVALID_PORT_BASE; | |
2812 | return; | |
2813 | } | |
2814 | last = index; | |
2815 | break; | |
2816 | ||
2817 | case 6: | |
f2cf8e25 AC |
2818 | board.membase = ints[index]; |
2819 | if (ints[index] <= 0) { | |
2820 | printk(KERN_ERR "epca_setup: Invalid memory base 0x%x\n",(unsigned int)board.membase); | |
1da177e4 LT |
2821 | invalid_lilo_config = 1; |
2822 | setup_error_code |= INVALID_MEM_BASE; | |
2823 | return; | |
2824 | } | |
2825 | last = index; | |
2826 | break; | |
2827 | ||
2828 | default: | |
2829 | printk(KERN_ERR "<Error> - epca_setup: Too many integer parms\n"); | |
2830 | return; | |
2831 | ||
2832 | } /* End parse switch */ | |
2833 | ||
f2cf8e25 | 2834 | while (str && *str) { /* Begin while there is a string arg */ |
1da177e4 LT |
2835 | /* find the next comma or terminator */ |
2836 | temp = str; | |
1da177e4 LT |
2837 | /* While string is not null, and a comma hasn't been found */ |
2838 | while (*temp && (*temp != ',')) | |
2839 | temp++; | |
1da177e4 LT |
2840 | if (!*temp) |
2841 | temp = NULL; | |
2842 | else | |
2843 | *temp++ = 0; | |
1da177e4 LT |
2844 | /* Set index to the number of args + 1 */ |
2845 | index = last + 1; | |
2846 | ||
2847 | switch(index) | |
2848 | { | |
2849 | case 1: | |
2850 | len = strlen(str); | |
2851 | if (strncmp("Disable", str, len) == 0) | |
2852 | board.status = 0; | |
f2cf8e25 | 2853 | else if (strncmp("Enable", str, len) == 0) |
1da177e4 | 2854 | board.status = 1; |
f2cf8e25 AC |
2855 | else { |
2856 | printk(KERN_ERR "epca_setup: Invalid status %s\n", str); | |
1da177e4 LT |
2857 | invalid_lilo_config = 1; |
2858 | setup_error_code |= INVALID_BOARD_STATUS; | |
2859 | return; | |
2860 | } | |
2861 | last = index; | |
2862 | break; | |
2863 | ||
2864 | case 2: | |
1da177e4 LT |
2865 | for(loop = 0; loop < EPCA_NUM_TYPES; loop++) |
2866 | if (strcmp(board_desc[loop], str) == 0) | |
2867 | break; | |
1da177e4 LT |
2868 | /* --------------------------------------------------------------- |
2869 | If the index incremented above refers to a legitamate board | |
2870 | type set it here. | |
2871 | ------------------------------------------------------------------*/ | |
1da177e4 LT |
2872 | if (index < EPCA_NUM_TYPES) |
2873 | board.type = loop; | |
f2cf8e25 AC |
2874 | else { |
2875 | printk(KERN_ERR "epca_setup: Invalid board type: %s\n", str); | |
1da177e4 LT |
2876 | invalid_lilo_config = 1; |
2877 | setup_error_code |= INVALID_BOARD_TYPE; | |
2878 | return; | |
2879 | } | |
2880 | last = index; | |
2881 | break; | |
2882 | ||
2883 | case 3: | |
2884 | len = strlen(str); | |
2885 | if (strncmp("Disable", str, len) == 0) | |
2886 | board.altpin = 0; | |
f2cf8e25 | 2887 | else if (strncmp("Enable", str, len) == 0) |
1da177e4 | 2888 | board.altpin = 1; |
f2cf8e25 AC |
2889 | else { |
2890 | printk(KERN_ERR "epca_setup: Invalid altpin %s\n", str); | |
1da177e4 LT |
2891 | invalid_lilo_config = 1; |
2892 | setup_error_code |= INVALID_ALTPIN; | |
2893 | return; | |
2894 | } | |
2895 | last = index; | |
2896 | break; | |
2897 | ||
2898 | case 4: | |
2899 | t2 = str; | |
2900 | while (isdigit(*t2)) | |
2901 | t2++; | |
2902 | ||
f2cf8e25 AC |
2903 | if (*t2) { |
2904 | printk(KERN_ERR "epca_setup: Invalid port count %s\n", str); | |
1da177e4 LT |
2905 | invalid_lilo_config = 1; |
2906 | setup_error_code |= INVALID_NUM_PORTS; | |
2907 | return; | |
2908 | } | |
2909 | ||
2910 | /* ------------------------------------------------------------ | |
2911 | There is not a man page for simple_strtoul but the code can be | |
2912 | found in vsprintf.c. The first argument is the string to | |
2913 | translate (To an unsigned long obviously), the second argument | |
2914 | can be the address of any character variable or a NULL. If a | |
2915 | variable is given, the end pointer of the string will be stored | |
2916 | in that variable; if a NULL is given the end pointer will | |
2917 | not be returned. The last argument is the base to use. If | |
2918 | a 0 is indicated, the routine will attempt to determine the | |
2919 | proper base by looking at the values prefix (A '0' for octal, | |
2920 | a 'x' for hex, etc ... If a value is given it will use that | |
2921 | value as the base. | |
2922 | ---------------------------------------------------------------- */ | |
2923 | board.numports = simple_strtoul(str, NULL, 0); | |
2924 | nbdevs += board.numports; | |
2925 | last = index; | |
2926 | break; | |
2927 | ||
2928 | case 5: | |
2929 | t2 = str; | |
2930 | while (isxdigit(*t2)) | |
2931 | t2++; | |
2932 | ||
f2cf8e25 AC |
2933 | if (*t2) { |
2934 | printk(KERN_ERR "epca_setup: Invalid i/o address %s\n", str); | |
1da177e4 LT |
2935 | invalid_lilo_config = 1; |
2936 | setup_error_code |= INVALID_PORT_BASE; | |
2937 | return; | |
2938 | } | |
2939 | ||
f2cf8e25 | 2940 | board.port = simple_strtoul(str, NULL, 16); |
1da177e4 LT |
2941 | last = index; |
2942 | break; | |
2943 | ||
2944 | case 6: | |
2945 | t2 = str; | |
2946 | while (isxdigit(*t2)) | |
2947 | t2++; | |
2948 | ||
f2cf8e25 AC |
2949 | if (*t2) { |
2950 | printk(KERN_ERR "epca_setup: Invalid memory base %s\n",str); | |
1da177e4 LT |
2951 | invalid_lilo_config = 1; |
2952 | setup_error_code |= INVALID_MEM_BASE; | |
2953 | return; | |
2954 | } | |
f2cf8e25 | 2955 | board.membase = simple_strtoul(str, NULL, 16); |
1da177e4 LT |
2956 | last = index; |
2957 | break; | |
1da177e4 | 2958 | default: |
f2cf8e25 | 2959 | printk(KERN_ERR "epca: Too many string parms\n"); |
1da177e4 LT |
2960 | return; |
2961 | } | |
2962 | str = temp; | |
1da177e4 LT |
2963 | } /* End while there is a string arg */ |
2964 | ||
f2cf8e25 AC |
2965 | if (last < 6) { |
2966 | printk(KERN_ERR "epca: Insufficient parms specified\n"); | |
1da177e4 LT |
2967 | return; |
2968 | } | |
2969 | ||
2970 | /* I should REALLY validate the stuff here */ | |
1da177e4 LT |
2971 | /* Copies our local copy of board into boards */ |
2972 | memcpy((void *)&boards[num_cards],(void *)&board, sizeof(board)); | |
1da177e4 | 2973 | /* Does this get called once per lilo arg are what ? */ |
1da177e4 LT |
2974 | printk(KERN_INFO "PC/Xx: Added board %i, %s %i ports at 0x%4.4X base 0x%6.6X\n", |
2975 | num_cards, board_desc[board.type], | |
2976 | board.numports, (int)board.port, (unsigned int) board.membase); | |
1da177e4 | 2977 | num_cards++; |
1da177e4 LT |
2978 | } /* End epca_setup */ |
2979 | ||
2980 | ||
1da177e4 LT |
2981 | /* ------------------------ Begin init_PCI --------------------------- */ |
2982 | ||
2983 | enum epic_board_types { | |
2984 | brd_xr = 0, | |
2985 | brd_xem, | |
2986 | brd_cx, | |
2987 | brd_xrj, | |
2988 | }; | |
2989 | ||
2990 | ||
2991 | /* indexed directly by epic_board_types enum */ | |
2992 | static struct { | |
2993 | unsigned char board_type; | |
2994 | unsigned bar_idx; /* PCI base address region */ | |
2995 | } epca_info_tbl[] = { | |
2996 | { PCIXR, 0, }, | |
2997 | { PCIXEM, 0, }, | |
2998 | { PCICX, 0, }, | |
2999 | { PCIXRJ, 2, }, | |
3000 | }; | |
3001 | ||
1da177e4 LT |
3002 | static int __devinit epca_init_one (struct pci_dev *pdev, |
3003 | const struct pci_device_id *ent) | |
3004 | { | |
3005 | static int board_num = -1; | |
3006 | int board_idx, info_idx = ent->driver_data; | |
3007 | unsigned long addr; | |
3008 | ||
3009 | if (pci_enable_device(pdev)) | |
3010 | return -EIO; | |
3011 | ||
3012 | board_num++; | |
3013 | board_idx = board_num + num_cards; | |
3014 | if (board_idx >= MAXBOARDS) | |
3015 | goto err_out; | |
3016 | ||
3017 | addr = pci_resource_start (pdev, epca_info_tbl[info_idx].bar_idx); | |
3018 | if (!addr) { | |
3019 | printk (KERN_ERR PFX "PCI region #%d not available (size 0)\n", | |
3020 | epca_info_tbl[info_idx].bar_idx); | |
3021 | goto err_out; | |
3022 | } | |
3023 | ||
3024 | boards[board_idx].status = ENABLED; | |
3025 | boards[board_idx].type = epca_info_tbl[info_idx].board_type; | |
3026 | boards[board_idx].numports = 0x0; | |
f2cf8e25 AC |
3027 | boards[board_idx].port = addr + PCI_IO_OFFSET; |
3028 | boards[board_idx].membase = addr; | |
1da177e4 LT |
3029 | |
3030 | if (!request_mem_region (addr + PCI_IO_OFFSET, 0x200000, "epca")) { | |
3031 | printk (KERN_ERR PFX "resource 0x%x @ 0x%lx unavailable\n", | |
3032 | 0x200000, addr + PCI_IO_OFFSET); | |
3033 | goto err_out; | |
3034 | } | |
3035 | ||
3036 | boards[board_idx].re_map_port = ioremap(addr + PCI_IO_OFFSET, 0x200000); | |
3037 | if (!boards[board_idx].re_map_port) { | |
3038 | printk (KERN_ERR PFX "cannot map 0x%x @ 0x%lx\n", | |
3039 | 0x200000, addr + PCI_IO_OFFSET); | |
3040 | goto err_out_free_pciio; | |
3041 | } | |
3042 | ||
3043 | if (!request_mem_region (addr, 0x200000, "epca")) { | |
3044 | printk (KERN_ERR PFX "resource 0x%x @ 0x%lx unavailable\n", | |
3045 | 0x200000, addr); | |
3046 | goto err_out_free_iounmap; | |
3047 | } | |
3048 | ||
3049 | boards[board_idx].re_map_membase = ioremap(addr, 0x200000); | |
3050 | if (!boards[board_idx].re_map_membase) { | |
3051 | printk (KERN_ERR PFX "cannot map 0x%x @ 0x%lx\n", | |
3052 | 0x200000, addr + PCI_IO_OFFSET); | |
3053 | goto err_out_free_memregion; | |
3054 | } | |
3055 | ||
3056 | /* -------------------------------------------------------------- | |
3057 | I don't know what the below does, but the hardware guys say | |
3058 | its required on everything except PLX (In this case XRJ). | |
3059 | ---------------------------------------------------------------- */ | |
3060 | if (info_idx != brd_xrj) { | |
3061 | pci_write_config_byte(pdev, 0x40, 0); | |
3062 | pci_write_config_byte(pdev, 0x46, 0); | |
3063 | } | |
3064 | ||
3065 | return 0; | |
3066 | ||
3067 | err_out_free_memregion: | |
3068 | release_mem_region (addr, 0x200000); | |
3069 | err_out_free_iounmap: | |
3070 | iounmap (boards[board_idx].re_map_port); | |
3071 | err_out_free_pciio: | |
3072 | release_mem_region (addr + PCI_IO_OFFSET, 0x200000); | |
3073 | err_out: | |
3074 | return -ENODEV; | |
3075 | } | |
3076 | ||
3077 | ||
3078 | static struct pci_device_id epca_pci_tbl[] = { | |
3079 | { PCI_VENDOR_DIGI, PCI_DEVICE_XR, PCI_ANY_ID, PCI_ANY_ID, 0, 0, brd_xr }, | |
3080 | { PCI_VENDOR_DIGI, PCI_DEVICE_XEM, PCI_ANY_ID, PCI_ANY_ID, 0, 0, brd_xem }, | |
3081 | { PCI_VENDOR_DIGI, PCI_DEVICE_CX, PCI_ANY_ID, PCI_ANY_ID, 0, 0, brd_cx }, | |
3082 | { PCI_VENDOR_DIGI, PCI_DEVICE_XRJ, PCI_ANY_ID, PCI_ANY_ID, 0, 0, brd_xrj }, | |
3083 | { 0, } | |
3084 | }; | |
3085 | ||
3086 | MODULE_DEVICE_TABLE(pci, epca_pci_tbl); | |
3087 | ||
3088 | int __init init_PCI (void) | |
f2cf8e25 | 3089 | { /* Begin init_PCI */ |
1da177e4 LT |
3090 | memset (&epca_driver, 0, sizeof (epca_driver)); |
3091 | epca_driver.name = "epca"; | |
3092 | epca_driver.id_table = epca_pci_tbl; | |
3093 | epca_driver.probe = epca_init_one; | |
3094 | ||
3095 | return pci_register_driver(&epca_driver); | |
f2cf8e25 | 3096 | } |
1da177e4 LT |
3097 | |
3098 | MODULE_LICENSE("GPL"); |