Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | ||
3 | ||
4 | Copyright (C) 1996 Digi International. | |
5 | ||
6 | For technical support please email digiLinux@dgii.com or | |
7 | call Digi tech support at (612) 912-3456 | |
8 | ||
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 LT |
211 | |
212 | static int get_termio(struct tty_struct *, struct termio __user *); | |
213 | static int pc_write(struct tty_struct *, const unsigned char *, int); | |
f2cf8e25 | 214 | static int pc_init(void); |
1da177e4 | 215 | static int init_PCI(void); |
1da177e4 LT |
216 | |
217 | ||
218 | /* ------------------------------------------------------------------ | |
219 | Table of functions for each board to handle memory. Mantaining | |
220 | parallelism is a *very* good idea here. The idea is for the | |
221 | runtime code to blindly call these functions, not knowing/caring | |
222 | about the underlying hardware. This stuff should contain no | |
223 | conditionals; if more functionality is needed a different entry | |
224 | should be established. These calls are the interface calls and | |
225 | are the only functions that should be accessed. Anyone caught | |
226 | making direct calls deserves what they get. | |
227 | -------------------------------------------------------------------- */ | |
228 | ||
f2cf8e25 | 229 | static void memwinon(struct board_info *b, unsigned int win) |
1da177e4 LT |
230 | { |
231 | (b->memwinon)(b, win); | |
232 | } | |
233 | ||
f2cf8e25 | 234 | static void memwinoff(struct board_info *b, unsigned int win) |
1da177e4 LT |
235 | { |
236 | (b->memwinoff)(b, win); | |
237 | } | |
238 | ||
f2cf8e25 | 239 | static void globalwinon(struct channel *ch) |
1da177e4 LT |
240 | { |
241 | (ch->board->globalwinon)(ch); | |
242 | } | |
243 | ||
f2cf8e25 | 244 | static void rxwinon(struct channel *ch) |
1da177e4 LT |
245 | { |
246 | (ch->board->rxwinon)(ch); | |
247 | } | |
248 | ||
f2cf8e25 | 249 | static void txwinon(struct channel *ch) |
1da177e4 LT |
250 | { |
251 | (ch->board->txwinon)(ch); | |
252 | } | |
253 | ||
f2cf8e25 | 254 | static void memoff(struct channel *ch) |
1da177e4 LT |
255 | { |
256 | (ch->board->memoff)(ch); | |
257 | } | |
f2cf8e25 | 258 | static void assertgwinon(struct channel *ch) |
1da177e4 LT |
259 | { |
260 | (ch->board->assertgwinon)(ch); | |
261 | } | |
262 | ||
f2cf8e25 | 263 | static void assertmemoff(struct channel *ch) |
1da177e4 LT |
264 | { |
265 | (ch->board->assertmemoff)(ch); | |
266 | } | |
267 | ||
268 | /* --------------------------------------------------------- | |
269 | PCXEM windowing is the same as that used in the PCXR | |
270 | and CX series cards. | |
271 | ------------------------------------------------------------ */ | |
272 | ||
f2cf8e25 | 273 | static void pcxem_memwinon(struct board_info *b, unsigned int win) |
1da177e4 | 274 | { |
f2cf8e25 | 275 | outb_p(FEPWIN|win, b->port + 1); |
1da177e4 LT |
276 | } |
277 | ||
f2cf8e25 | 278 | static void pcxem_memwinoff(struct board_info *b, unsigned int win) |
1da177e4 | 279 | { |
f2cf8e25 | 280 | outb_p(0, b->port + 1); |
1da177e4 LT |
281 | } |
282 | ||
f2cf8e25 | 283 | static void pcxem_globalwinon(struct channel *ch) |
1da177e4 LT |
284 | { |
285 | outb_p( FEPWIN, (int)ch->board->port + 1); | |
286 | } | |
287 | ||
f2cf8e25 | 288 | static void pcxem_rxwinon(struct channel *ch) |
1da177e4 LT |
289 | { |
290 | outb_p(ch->rxwin, (int)ch->board->port + 1); | |
291 | } | |
292 | ||
f2cf8e25 | 293 | static void pcxem_txwinon(struct channel *ch) |
1da177e4 LT |
294 | { |
295 | outb_p(ch->txwin, (int)ch->board->port + 1); | |
296 | } | |
297 | ||
f2cf8e25 | 298 | static void pcxem_memoff(struct channel *ch) |
1da177e4 LT |
299 | { |
300 | outb_p(0, (int)ch->board->port + 1); | |
301 | } | |
302 | ||
303 | /* ----------------- Begin pcxe memory window stuff ------------------ */ | |
304 | ||
f2cf8e25 | 305 | static void pcxe_memwinon(struct board_info *b, unsigned int win) |
1da177e4 | 306 | { |
f2cf8e25 | 307 | outb_p(FEPWIN | win, b->port + 1); |
1da177e4 LT |
308 | } |
309 | ||
f2cf8e25 | 310 | static void pcxe_memwinoff(struct board_info *b, unsigned int win) |
1da177e4 | 311 | { |
f2cf8e25 AC |
312 | outb_p(inb(b->port) & ~FEPMEM, |
313 | b->port + 1); | |
314 | outb_p(0, b->port + 1); | |
1da177e4 LT |
315 | } |
316 | ||
f2cf8e25 | 317 | static void pcxe_globalwinon(struct channel *ch) |
1da177e4 LT |
318 | { |
319 | outb_p( FEPWIN, (int)ch->board->port + 1); | |
320 | } | |
321 | ||
f2cf8e25 | 322 | static void pcxe_rxwinon(struct channel *ch) |
1da177e4 LT |
323 | { |
324 | outb_p(ch->rxwin, (int)ch->board->port + 1); | |
325 | } | |
326 | ||
f2cf8e25 | 327 | static void pcxe_txwinon(struct channel *ch) |
1da177e4 LT |
328 | { |
329 | outb_p(ch->txwin, (int)ch->board->port + 1); | |
330 | } | |
331 | ||
f2cf8e25 | 332 | static void pcxe_memoff(struct channel *ch) |
1da177e4 LT |
333 | { |
334 | outb_p(0, (int)ch->board->port); | |
335 | outb_p(0, (int)ch->board->port + 1); | |
336 | } | |
337 | ||
338 | /* ------------- Begin pc64xe and pcxi memory window stuff -------------- */ | |
339 | ||
f2cf8e25 | 340 | static void pcxi_memwinon(struct board_info *b, unsigned int win) |
1da177e4 | 341 | { |
f2cf8e25 | 342 | outb_p(inb(b->port) | FEPMEM, b->port); |
1da177e4 LT |
343 | } |
344 | ||
f2cf8e25 | 345 | static void pcxi_memwinoff(struct board_info *b, unsigned int win) |
1da177e4 | 346 | { |
f2cf8e25 | 347 | outb_p(inb(b->port) & ~FEPMEM, b->port); |
1da177e4 LT |
348 | } |
349 | ||
f2cf8e25 | 350 | static void pcxi_globalwinon(struct channel *ch) |
1da177e4 | 351 | { |
f2cf8e25 | 352 | outb_p(FEPMEM, ch->board->port); |
1da177e4 LT |
353 | } |
354 | ||
f2cf8e25 | 355 | static void pcxi_rxwinon(struct channel *ch) |
1da177e4 | 356 | { |
f2cf8e25 | 357 | outb_p(FEPMEM, ch->board->port); |
1da177e4 LT |
358 | } |
359 | ||
f2cf8e25 | 360 | static void pcxi_txwinon(struct channel *ch) |
1da177e4 | 361 | { |
f2cf8e25 | 362 | outb_p(FEPMEM, ch->board->port); |
1da177e4 LT |
363 | } |
364 | ||
f2cf8e25 | 365 | static void pcxi_memoff(struct channel *ch) |
1da177e4 | 366 | { |
f2cf8e25 | 367 | outb_p(0, ch->board->port); |
1da177e4 LT |
368 | } |
369 | ||
f2cf8e25 | 370 | static void pcxi_assertgwinon(struct channel *ch) |
1da177e4 | 371 | { |
f2cf8e25 | 372 | epcaassert(inb(ch->board->port) & FEPMEM, "Global memory off"); |
1da177e4 LT |
373 | } |
374 | ||
f2cf8e25 | 375 | static void pcxi_assertmemoff(struct channel *ch) |
1da177e4 | 376 | { |
f2cf8e25 | 377 | epcaassert(!(inb(ch->board->port) & FEPMEM), "Memory on"); |
1da177e4 LT |
378 | } |
379 | ||
380 | ||
381 | /* ---------------------------------------------------------------------- | |
382 | Not all of the cards need specific memory windowing routines. Some | |
383 | cards (Such as PCI) needs no windowing routines at all. We provide | |
384 | these do nothing routines so that the same code base can be used. | |
385 | The driver will ALWAYS call a windowing routine if it thinks it needs | |
386 | to; regardless of the card. However, dependent on the card the routine | |
387 | may or may not do anything. | |
388 | ---------------------------------------------------------------------------*/ | |
389 | ||
f2cf8e25 | 390 | static void dummy_memwinon(struct board_info *b, unsigned int win) |
1da177e4 LT |
391 | { |
392 | } | |
393 | ||
f2cf8e25 | 394 | static void dummy_memwinoff(struct board_info *b, unsigned int win) |
1da177e4 LT |
395 | { |
396 | } | |
397 | ||
f2cf8e25 | 398 | static void dummy_globalwinon(struct channel *ch) |
1da177e4 LT |
399 | { |
400 | } | |
401 | ||
f2cf8e25 | 402 | static void dummy_rxwinon(struct channel *ch) |
1da177e4 LT |
403 | { |
404 | } | |
405 | ||
f2cf8e25 | 406 | static void dummy_txwinon(struct channel *ch) |
1da177e4 LT |
407 | { |
408 | } | |
409 | ||
f2cf8e25 | 410 | static void dummy_memoff(struct channel *ch) |
1da177e4 LT |
411 | { |
412 | } | |
413 | ||
f2cf8e25 | 414 | static void dummy_assertgwinon(struct channel *ch) |
1da177e4 LT |
415 | { |
416 | } | |
417 | ||
f2cf8e25 | 418 | static void dummy_assertmemoff(struct channel *ch) |
1da177e4 LT |
419 | { |
420 | } | |
421 | ||
422 | /* ----------------- Begin verifyChannel function ----------------------- */ | |
f2cf8e25 | 423 | static struct channel *verifyChannel(struct tty_struct *tty) |
1da177e4 | 424 | { /* Begin verifyChannel */ |
1da177e4 LT |
425 | /* -------------------------------------------------------------------- |
426 | This routine basically provides a sanity check. It insures that | |
427 | the channel returned is within the proper range of addresses as | |
428 | well as properly initialized. If some bogus info gets passed in | |
429 | through tty->driver_data this should catch it. | |
f2cf8e25 AC |
430 | --------------------------------------------------------------------- */ |
431 | if (tty) { | |
432 | struct channel *ch = (struct channel *)tty->driver_data; | |
433 | if ((ch >= &digi_channels[0]) && (ch < &digi_channels[nbdevs])) { | |
1da177e4 LT |
434 | if (ch->magic == EPCA_MAGIC) |
435 | return ch; | |
436 | } | |
f2cf8e25 | 437 | } |
1da177e4 LT |
438 | return NULL; |
439 | ||
440 | } /* End verifyChannel */ | |
441 | ||
442 | /* ------------------ Begin pc_sched_event ------------------------- */ | |
443 | ||
f2cf8e25 AC |
444 | static void pc_sched_event(struct channel *ch, int event) |
445 | { | |
1da177e4 LT |
446 | /* ---------------------------------------------------------------------- |
447 | We call this to schedule interrupt processing on some event. The | |
448 | kernel sees our request and calls the related routine in OUR driver. | |
449 | -------------------------------------------------------------------------*/ | |
1da177e4 LT |
450 | ch->event |= 1 << event; |
451 | schedule_work(&ch->tqueue); | |
1da177e4 LT |
452 | } /* End pc_sched_event */ |
453 | ||
454 | /* ------------------ Begin epca_error ------------------------- */ | |
455 | ||
456 | static void epca_error(int line, char *msg) | |
f2cf8e25 | 457 | { |
1da177e4 | 458 | printk(KERN_ERR "epca_error (Digi): line = %d %s\n",line,msg); |
f2cf8e25 | 459 | } |
1da177e4 LT |
460 | |
461 | /* ------------------ Begin pc_close ------------------------- */ | |
462 | static void pc_close(struct tty_struct * tty, struct file * filp) | |
f2cf8e25 | 463 | { |
1da177e4 LT |
464 | struct channel *ch; |
465 | unsigned long flags; | |
1da177e4 LT |
466 | /* --------------------------------------------------------- |
467 | verifyChannel returns the channel from the tty struct | |
468 | if it is valid. This serves as a sanity check. | |
469 | ------------------------------------------------------------- */ | |
f2cf8e25 AC |
470 | if ((ch = verifyChannel(tty)) != NULL) { /* Begin if ch != NULL */ |
471 | spin_lock_irqsave(&epca_lock, flags); | |
472 | if (tty_hung_up_p(filp)) { | |
473 | spin_unlock_irqrestore(&epca_lock, flags); | |
1da177e4 LT |
474 | return; |
475 | } | |
1da177e4 | 476 | /* Check to see if the channel is open more than once */ |
f2cf8e25 AC |
477 | if (ch->count-- > 1) { |
478 | /* Begin channel is open more than once */ | |
1da177e4 LT |
479 | /* ------------------------------------------------------------- |
480 | Return without doing anything. Someone might still be using | |
481 | the channel. | |
482 | ---------------------------------------------------------------- */ | |
f2cf8e25 | 483 | spin_unlock_irqrestore(&epca_lock, flags); |
1da177e4 LT |
484 | return; |
485 | } /* End channel is open more than once */ | |
486 | ||
487 | /* Port open only once go ahead with shutdown & reset */ | |
56ee4827 | 488 | BUG_ON(ch->count < 0); |
1da177e4 LT |
489 | |
490 | /* --------------------------------------------------------------- | |
491 | Let the rest of the driver know the channel is being closed. | |
492 | This becomes important if an open is attempted before close | |
493 | is finished. | |
494 | ------------------------------------------------------------------ */ | |
1da177e4 | 495 | ch->asyncflags |= ASYNC_CLOSING; |
1da177e4 LT |
496 | tty->closing = 1; |
497 | ||
f2cf8e25 AC |
498 | spin_unlock_irqrestore(&epca_lock, flags); |
499 | ||
500 | if (ch->asyncflags & ASYNC_INITIALIZED) { | |
1da177e4 LT |
501 | /* Setup an event to indicate when the transmit buffer empties */ |
502 | setup_empty_event(tty, ch); | |
503 | tty_wait_until_sent(tty, 3000); /* 30 seconds timeout */ | |
504 | } | |
1da177e4 LT |
505 | if (tty->driver->flush_buffer) |
506 | tty->driver->flush_buffer(tty); | |
507 | ||
508 | tty_ldisc_flush(tty); | |
509 | shutdown(ch); | |
f2cf8e25 AC |
510 | |
511 | spin_lock_irqsave(&epca_lock, flags); | |
1da177e4 LT |
512 | tty->closing = 0; |
513 | ch->event = 0; | |
514 | ch->tty = NULL; | |
f2cf8e25 | 515 | spin_unlock_irqrestore(&epca_lock, flags); |
1da177e4 | 516 | |
f2cf8e25 | 517 | if (ch->blocked_open) { /* Begin if blocked_open */ |
1da177e4 | 518 | if (ch->close_delay) |
1da177e4 | 519 | msleep_interruptible(jiffies_to_msecs(ch->close_delay)); |
1da177e4 | 520 | wake_up_interruptible(&ch->open_wait); |
1da177e4 | 521 | } /* End if blocked_open */ |
1da177e4 LT |
522 | ch->asyncflags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_INITIALIZED | |
523 | ASYNC_CLOSING); | |
524 | wake_up_interruptible(&ch->close_wait); | |
1da177e4 | 525 | } /* End if ch != NULL */ |
1da177e4 LT |
526 | } /* End pc_close */ |
527 | ||
528 | /* ------------------ Begin shutdown ------------------------- */ | |
529 | ||
530 | static void shutdown(struct channel *ch) | |
531 | { /* Begin shutdown */ | |
532 | ||
533 | unsigned long flags; | |
534 | struct tty_struct *tty; | |
bc9a5154 | 535 | struct board_chan __iomem *bc; |
1da177e4 LT |
536 | |
537 | if (!(ch->asyncflags & ASYNC_INITIALIZED)) | |
538 | return; | |
539 | ||
f2cf8e25 | 540 | spin_lock_irqsave(&epca_lock, flags); |
1da177e4 | 541 | |
f2cf8e25 | 542 | globalwinon(ch); |
1da177e4 LT |
543 | bc = ch->brdchan; |
544 | ||
545 | /* ------------------------------------------------------------------ | |
546 | In order for an event to be generated on the receipt of data the | |
547 | idata flag must be set. Since we are shutting down, this is not | |
548 | necessary clear this flag. | |
549 | --------------------------------------------------------------------- */ | |
550 | ||
551 | if (bc) | |
f2cf8e25 | 552 | writeb(0, &bc->idata); |
1da177e4 LT |
553 | tty = ch->tty; |
554 | ||
555 | /* ---------------------------------------------------------------- | |
556 | If we're a modem control device and HUPCL is on, drop RTS & DTR. | |
557 | ------------------------------------------------------------------ */ | |
558 | ||
f2cf8e25 | 559 | if (tty->termios->c_cflag & HUPCL) { |
1da177e4 LT |
560 | ch->omodem &= ~(ch->m_rts | ch->m_dtr); |
561 | fepcmd(ch, SETMODEM, 0, ch->m_dtr | ch->m_rts, 10, 1); | |
562 | } | |
1da177e4 LT |
563 | memoff(ch); |
564 | ||
565 | /* ------------------------------------------------------------------ | |
566 | The channel has officialy been closed. The next time it is opened | |
567 | it will have to reinitialized. Set a flag to indicate this. | |
568 | ---------------------------------------------------------------------- */ | |
569 | ||
570 | /* Prevent future Digi programmed interrupts from coming active */ | |
571 | ||
572 | ch->asyncflags &= ~ASYNC_INITIALIZED; | |
f2cf8e25 | 573 | spin_unlock_irqrestore(&epca_lock, flags); |
1da177e4 LT |
574 | |
575 | } /* End shutdown */ | |
576 | ||
577 | /* ------------------ Begin pc_hangup ------------------------- */ | |
578 | ||
579 | static void pc_hangup(struct tty_struct *tty) | |
580 | { /* Begin pc_hangup */ | |
1da177e4 LT |
581 | struct channel *ch; |
582 | ||
583 | /* --------------------------------------------------------- | |
584 | verifyChannel returns the channel from the tty struct | |
585 | if it is valid. This serves as a sanity check. | |
586 | ------------------------------------------------------------- */ | |
587 | ||
f2cf8e25 | 588 | if ((ch = verifyChannel(tty)) != NULL) { /* Begin if ch != NULL */ |
1da177e4 LT |
589 | unsigned long flags; |
590 | ||
1da177e4 LT |
591 | if (tty->driver->flush_buffer) |
592 | tty->driver->flush_buffer(tty); | |
593 | tty_ldisc_flush(tty); | |
594 | shutdown(ch); | |
595 | ||
f2cf8e25 | 596 | spin_lock_irqsave(&epca_lock, flags); |
1da177e4 LT |
597 | ch->tty = NULL; |
598 | ch->event = 0; | |
599 | ch->count = 0; | |
1da177e4 | 600 | ch->asyncflags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_INITIALIZED); |
f2cf8e25 | 601 | spin_unlock_irqrestore(&epca_lock, flags); |
1da177e4 | 602 | wake_up_interruptible(&ch->open_wait); |
1da177e4 LT |
603 | } /* End if ch != NULL */ |
604 | ||
605 | } /* End pc_hangup */ | |
606 | ||
607 | /* ------------------ Begin pc_write ------------------------- */ | |
608 | ||
609 | static int pc_write(struct tty_struct * tty, | |
610 | const unsigned char *buf, int bytesAvailable) | |
611 | { /* Begin pc_write */ | |
f2cf8e25 AC |
612 | unsigned int head, tail; |
613 | int dataLen; | |
614 | int size; | |
615 | int amountCopied; | |
1da177e4 LT |
616 | struct channel *ch; |
617 | unsigned long flags; | |
618 | int remain; | |
bc9a5154 | 619 | struct board_chan __iomem *bc; |
1da177e4 LT |
620 | |
621 | /* ---------------------------------------------------------------- | |
622 | pc_write is primarily called directly by the kernel routine | |
623 | tty_write (Though it can also be called by put_char) found in | |
624 | tty_io.c. pc_write is passed a line discipline buffer where | |
625 | the data to be written out is stored. The line discipline | |
626 | implementation itself is done at the kernel level and is not | |
627 | brought into the driver. | |
628 | ------------------------------------------------------------------- */ | |
629 | ||
630 | /* --------------------------------------------------------- | |
631 | verifyChannel returns the channel from the tty struct | |
632 | if it is valid. This serves as a sanity check. | |
633 | ------------------------------------------------------------- */ | |
634 | ||
635 | if ((ch = verifyChannel(tty)) == NULL) | |
636 | return 0; | |
637 | ||
638 | /* Make a pointer to the channel data structure found on the board. */ | |
639 | ||
640 | bc = ch->brdchan; | |
641 | size = ch->txbufsize; | |
1da177e4 | 642 | amountCopied = 0; |
1da177e4 | 643 | |
f2cf8e25 | 644 | spin_lock_irqsave(&epca_lock, flags); |
1da177e4 LT |
645 | globalwinon(ch); |
646 | ||
f2cf8e25 AC |
647 | head = readw(&bc->tin) & (size - 1); |
648 | tail = readw(&bc->tout); | |
1da177e4 | 649 | |
f2cf8e25 AC |
650 | if (tail != readw(&bc->tout)) |
651 | tail = readw(&bc->tout); | |
1da177e4 LT |
652 | tail &= (size - 1); |
653 | ||
654 | /* If head >= tail, head has not wrapped around. */ | |
f2cf8e25 | 655 | if (head >= tail) { /* Begin head has not wrapped */ |
1da177e4 LT |
656 | /* --------------------------------------------------------------- |
657 | remain (much like dataLen above) represents the total amount of | |
658 | space available on the card for data. Here dataLen represents | |
659 | the space existing between the head pointer and the end of | |
660 | buffer. This is important because a memcpy cannot be told to | |
661 | automatically wrap around when it hits the buffer end. | |
662 | ------------------------------------------------------------------ */ | |
1da177e4 LT |
663 | dataLen = size - head; |
664 | remain = size - (head - tail) - 1; | |
f2cf8e25 | 665 | } else { /* Begin head has wrapped around */ |
1da177e4 LT |
666 | |
667 | remain = tail - head - 1; | |
668 | dataLen = remain; | |
669 | ||
670 | } /* End head has wrapped around */ | |
1da177e4 LT |
671 | /* ------------------------------------------------------------------- |
672 | Check the space on the card. If we have more data than | |
673 | space; reduce the amount of data to fit the space. | |
674 | ---------------------------------------------------------------------- */ | |
1da177e4 | 675 | bytesAvailable = min(remain, bytesAvailable); |
1da177e4 LT |
676 | txwinon(ch); |
677 | while (bytesAvailable > 0) | |
678 | { /* Begin while there is data to copy onto card */ | |
679 | ||
680 | /* ----------------------------------------------------------------- | |
681 | If head is not wrapped, the below will make sure the first | |
682 | data copy fills to the end of card buffer. | |
683 | ------------------------------------------------------------------- */ | |
684 | ||
685 | dataLen = min(bytesAvailable, dataLen); | |
bc9a5154 | 686 | memcpy_toio(ch->txptr + head, buf, dataLen); |
1da177e4 LT |
687 | buf += dataLen; |
688 | head += dataLen; | |
689 | amountCopied += dataLen; | |
690 | bytesAvailable -= dataLen; | |
691 | ||
f2cf8e25 | 692 | if (head >= size) { |
1da177e4 LT |
693 | head = 0; |
694 | dataLen = tail; | |
695 | } | |
1da177e4 | 696 | } /* End while there is data to copy onto card */ |
1da177e4 LT |
697 | ch->statusflags |= TXBUSY; |
698 | globalwinon(ch); | |
f2cf8e25 | 699 | writew(head, &bc->tin); |
1da177e4 | 700 | |
f2cf8e25 | 701 | if ((ch->statusflags & LOWWAIT) == 0) { |
1da177e4 | 702 | ch->statusflags |= LOWWAIT; |
f2cf8e25 | 703 | writeb(1, &bc->ilow); |
1da177e4 LT |
704 | } |
705 | memoff(ch); | |
f2cf8e25 | 706 | spin_unlock_irqrestore(&epca_lock, flags); |
1da177e4 LT |
707 | return(amountCopied); |
708 | ||
709 | } /* End pc_write */ | |
710 | ||
711 | /* ------------------ Begin pc_put_char ------------------------- */ | |
712 | ||
713 | static void pc_put_char(struct tty_struct *tty, unsigned char c) | |
714 | { /* Begin pc_put_char */ | |
1da177e4 | 715 | pc_write(tty, &c, 1); |
1da177e4 LT |
716 | } /* End pc_put_char */ |
717 | ||
718 | /* ------------------ Begin pc_write_room ------------------------- */ | |
719 | ||
720 | static int pc_write_room(struct tty_struct *tty) | |
721 | { /* Begin pc_write_room */ | |
722 | ||
723 | int remain; | |
724 | struct channel *ch; | |
725 | unsigned long flags; | |
726 | unsigned int head, tail; | |
bc9a5154 | 727 | struct board_chan __iomem *bc; |
1da177e4 LT |
728 | |
729 | remain = 0; | |
730 | ||
731 | /* --------------------------------------------------------- | |
732 | verifyChannel returns the channel from the tty struct | |
733 | if it is valid. This serves as a sanity check. | |
734 | ------------------------------------------------------------- */ | |
735 | ||
f2cf8e25 AC |
736 | if ((ch = verifyChannel(tty)) != NULL) { |
737 | spin_lock_irqsave(&epca_lock, flags); | |
1da177e4 LT |
738 | globalwinon(ch); |
739 | ||
740 | bc = ch->brdchan; | |
f2cf8e25 AC |
741 | head = readw(&bc->tin) & (ch->txbufsize - 1); |
742 | tail = readw(&bc->tout); | |
1da177e4 | 743 | |
f2cf8e25 AC |
744 | if (tail != readw(&bc->tout)) |
745 | tail = readw(&bc->tout); | |
1da177e4 LT |
746 | /* Wrap tail if necessary */ |
747 | tail &= (ch->txbufsize - 1); | |
748 | ||
749 | if ((remain = tail - head - 1) < 0 ) | |
750 | remain += ch->txbufsize; | |
751 | ||
f2cf8e25 | 752 | if (remain && (ch->statusflags & LOWWAIT) == 0) { |
1da177e4 | 753 | ch->statusflags |= LOWWAIT; |
f2cf8e25 | 754 | writeb(1, &bc->ilow); |
1da177e4 LT |
755 | } |
756 | memoff(ch); | |
f2cf8e25 | 757 | spin_unlock_irqrestore(&epca_lock, flags); |
1da177e4 | 758 | } |
1da177e4 LT |
759 | /* Return how much room is left on card */ |
760 | return remain; | |
761 | ||
762 | } /* End pc_write_room */ | |
763 | ||
764 | /* ------------------ Begin pc_chars_in_buffer ---------------------- */ | |
765 | ||
766 | static int pc_chars_in_buffer(struct tty_struct *tty) | |
767 | { /* Begin pc_chars_in_buffer */ | |
768 | ||
769 | int chars; | |
770 | unsigned int ctail, head, tail; | |
771 | int remain; | |
772 | unsigned long flags; | |
773 | struct channel *ch; | |
bc9a5154 | 774 | struct board_chan __iomem *bc; |
1da177e4 LT |
775 | |
776 | /* --------------------------------------------------------- | |
777 | verifyChannel returns the channel from the tty struct | |
778 | if it is valid. This serves as a sanity check. | |
779 | ------------------------------------------------------------- */ | |
780 | ||
781 | if ((ch = verifyChannel(tty)) == NULL) | |
782 | return(0); | |
783 | ||
f2cf8e25 | 784 | spin_lock_irqsave(&epca_lock, flags); |
1da177e4 LT |
785 | globalwinon(ch); |
786 | ||
787 | bc = ch->brdchan; | |
f2cf8e25 AC |
788 | tail = readw(&bc->tout); |
789 | head = readw(&bc->tin); | |
790 | ctail = readw(&ch->mailbox->cout); | |
1da177e4 | 791 | |
f2cf8e25 | 792 | if (tail == head && readw(&ch->mailbox->cin) == ctail && readb(&bc->tbusy) == 0) |
1da177e4 | 793 | chars = 0; |
f2cf8e25 AC |
794 | else { /* Begin if some space on the card has been used */ |
795 | head = readw(&bc->tin) & (ch->txbufsize - 1); | |
1da177e4 | 796 | tail &= (ch->txbufsize - 1); |
1da177e4 LT |
797 | /* -------------------------------------------------------------- |
798 | The logic here is basically opposite of the above pc_write_room | |
799 | here we are finding the amount of bytes in the buffer filled. | |
800 | Not the amount of bytes empty. | |
801 | ------------------------------------------------------------------- */ | |
1da177e4 LT |
802 | if ((remain = tail - head - 1) < 0 ) |
803 | remain += ch->txbufsize; | |
1da177e4 | 804 | chars = (int)(ch->txbufsize - remain); |
1da177e4 LT |
805 | /* ------------------------------------------------------------- |
806 | Make it possible to wakeup anything waiting for output | |
807 | in tty_ioctl.c, etc. | |
808 | ||
809 | If not already set. Setup an event to indicate when the | |
810 | transmit buffer empties | |
811 | ----------------------------------------------------------------- */ | |
1da177e4 LT |
812 | if (!(ch->statusflags & EMPTYWAIT)) |
813 | setup_empty_event(tty,ch); | |
814 | ||
815 | } /* End if some space on the card has been used */ | |
1da177e4 | 816 | memoff(ch); |
f2cf8e25 | 817 | spin_unlock_irqrestore(&epca_lock, flags); |
1da177e4 LT |
818 | /* Return number of characters residing on card. */ |
819 | return(chars); | |
820 | ||
821 | } /* End pc_chars_in_buffer */ | |
822 | ||
823 | /* ------------------ Begin pc_flush_buffer ---------------------- */ | |
824 | ||
825 | static void pc_flush_buffer(struct tty_struct *tty) | |
826 | { /* Begin pc_flush_buffer */ | |
827 | ||
828 | unsigned int tail; | |
829 | unsigned long flags; | |
830 | struct channel *ch; | |
bc9a5154 | 831 | struct board_chan __iomem *bc; |
1da177e4 LT |
832 | /* --------------------------------------------------------- |
833 | verifyChannel returns the channel from the tty struct | |
834 | if it is valid. This serves as a sanity check. | |
835 | ------------------------------------------------------------- */ | |
1da177e4 LT |
836 | if ((ch = verifyChannel(tty)) == NULL) |
837 | return; | |
838 | ||
f2cf8e25 | 839 | spin_lock_irqsave(&epca_lock, flags); |
1da177e4 | 840 | globalwinon(ch); |
1da177e4 | 841 | bc = ch->brdchan; |
f2cf8e25 | 842 | tail = readw(&bc->tout); |
1da177e4 | 843 | /* Have FEP move tout pointer; effectively flushing transmit buffer */ |
1da177e4 | 844 | fepcmd(ch, STOUT, (unsigned) tail, 0, 0, 0); |
1da177e4 | 845 | memoff(ch); |
f2cf8e25 | 846 | spin_unlock_irqrestore(&epca_lock, flags); |
1da177e4 LT |
847 | wake_up_interruptible(&tty->write_wait); |
848 | tty_wakeup(tty); | |
1da177e4 LT |
849 | } /* End pc_flush_buffer */ |
850 | ||
851 | /* ------------------ Begin pc_flush_chars ---------------------- */ | |
852 | ||
853 | static void pc_flush_chars(struct tty_struct *tty) | |
854 | { /* Begin pc_flush_chars */ | |
1da177e4 | 855 | struct channel * ch; |
1da177e4 LT |
856 | /* --------------------------------------------------------- |
857 | verifyChannel returns the channel from the tty struct | |
858 | if it is valid. This serves as a sanity check. | |
859 | ------------------------------------------------------------- */ | |
f2cf8e25 | 860 | if ((ch = verifyChannel(tty)) != NULL) { |
1da177e4 | 861 | unsigned long flags; |
f2cf8e25 | 862 | spin_lock_irqsave(&epca_lock, flags); |
1da177e4 LT |
863 | /* ---------------------------------------------------------------- |
864 | If not already set and the transmitter is busy setup an event | |
865 | to indicate when the transmit empties. | |
866 | ------------------------------------------------------------------- */ | |
1da177e4 LT |
867 | if ((ch->statusflags & TXBUSY) && !(ch->statusflags & EMPTYWAIT)) |
868 | setup_empty_event(tty,ch); | |
f2cf8e25 | 869 | spin_unlock_irqrestore(&epca_lock, flags); |
1da177e4 | 870 | } |
1da177e4 LT |
871 | } /* End pc_flush_chars */ |
872 | ||
873 | /* ------------------ Begin block_til_ready ---------------------- */ | |
874 | ||
875 | static int block_til_ready(struct tty_struct *tty, | |
876 | struct file *filp, struct channel *ch) | |
877 | { /* Begin block_til_ready */ | |
1da177e4 LT |
878 | DECLARE_WAITQUEUE(wait,current); |
879 | int retval, do_clocal = 0; | |
880 | unsigned long flags; | |
881 | ||
f2cf8e25 | 882 | if (tty_hung_up_p(filp)) { |
1da177e4 LT |
883 | if (ch->asyncflags & ASYNC_HUP_NOTIFY) |
884 | retval = -EAGAIN; | |
885 | else | |
886 | retval = -ERESTARTSYS; | |
887 | return(retval); | |
888 | } | |
889 | ||
890 | /* ----------------------------------------------------------------- | |
891 | If the device is in the middle of being closed, then block | |
892 | until it's done, and then try again. | |
893 | -------------------------------------------------------------------- */ | |
f2cf8e25 | 894 | if (ch->asyncflags & ASYNC_CLOSING) { |
1da177e4 LT |
895 | interruptible_sleep_on(&ch->close_wait); |
896 | ||
897 | if (ch->asyncflags & ASYNC_HUP_NOTIFY) | |
898 | return -EAGAIN; | |
899 | else | |
900 | return -ERESTARTSYS; | |
901 | } | |
902 | ||
f2cf8e25 | 903 | if (filp->f_flags & O_NONBLOCK) { |
1da177e4 LT |
904 | /* ----------------------------------------------------------------- |
905 | If non-blocking mode is set, then make the check up front | |
906 | and then exit. | |
907 | -------------------------------------------------------------------- */ | |
1da177e4 | 908 | ch->asyncflags |= ASYNC_NORMAL_ACTIVE; |
1da177e4 LT |
909 | return 0; |
910 | } | |
1da177e4 LT |
911 | if (tty->termios->c_cflag & CLOCAL) |
912 | do_clocal = 1; | |
f2cf8e25 | 913 | /* Block waiting for the carrier detect and the line to become free */ |
1da177e4 LT |
914 | |
915 | retval = 0; | |
916 | add_wait_queue(&ch->open_wait, &wait); | |
1da177e4 | 917 | |
f2cf8e25 | 918 | spin_lock_irqsave(&epca_lock, flags); |
1da177e4 LT |
919 | /* We dec count so that pc_close will know when to free things */ |
920 | if (!tty_hung_up_p(filp)) | |
921 | ch->count--; | |
1da177e4 | 922 | ch->blocked_open++; |
1da177e4 LT |
923 | while(1) |
924 | { /* Begin forever while */ | |
1da177e4 | 925 | set_current_state(TASK_INTERRUPTIBLE); |
1da177e4 LT |
926 | if (tty_hung_up_p(filp) || |
927 | !(ch->asyncflags & ASYNC_INITIALIZED)) | |
928 | { | |
929 | if (ch->asyncflags & ASYNC_HUP_NOTIFY) | |
930 | retval = -EAGAIN; | |
931 | else | |
932 | retval = -ERESTARTSYS; | |
933 | break; | |
934 | } | |
1da177e4 LT |
935 | if (!(ch->asyncflags & ASYNC_CLOSING) && |
936 | (do_clocal || (ch->imodem & ch->dcd))) | |
937 | break; | |
f2cf8e25 | 938 | if (signal_pending(current)) { |
1da177e4 LT |
939 | retval = -ERESTARTSYS; |
940 | break; | |
941 | } | |
f2cf8e25 | 942 | spin_unlock_irqrestore(&epca_lock, flags); |
1da177e4 LT |
943 | /* --------------------------------------------------------------- |
944 | Allow someone else to be scheduled. We will occasionally go | |
945 | through this loop until one of the above conditions change. | |
946 | The below schedule call will allow other processes to enter and | |
947 | prevent this loop from hogging the cpu. | |
948 | ------------------------------------------------------------------ */ | |
949 | schedule(); | |
f2cf8e25 | 950 | spin_lock_irqsave(&epca_lock, flags); |
1da177e4 LT |
951 | |
952 | } /* End forever while */ | |
953 | ||
954 | current->state = TASK_RUNNING; | |
955 | remove_wait_queue(&ch->open_wait, &wait); | |
1da177e4 LT |
956 | if (!tty_hung_up_p(filp)) |
957 | ch->count++; | |
1da177e4 LT |
958 | ch->blocked_open--; |
959 | ||
f2cf8e25 AC |
960 | spin_unlock_irqrestore(&epca_lock, flags); |
961 | ||
1da177e4 LT |
962 | if (retval) |
963 | return retval; | |
964 | ||
965 | ch->asyncflags |= ASYNC_NORMAL_ACTIVE; | |
1da177e4 | 966 | return 0; |
1da177e4 LT |
967 | } /* End block_til_ready */ |
968 | ||
969 | /* ------------------ Begin pc_open ---------------------- */ | |
970 | ||
971 | static int pc_open(struct tty_struct *tty, struct file * filp) | |
972 | { /* Begin pc_open */ | |
973 | ||
974 | struct channel *ch; | |
975 | unsigned long flags; | |
976 | int line, retval, boardnum; | |
bc9a5154 | 977 | struct board_chan __iomem *bc; |
f2cf8e25 | 978 | unsigned int head; |
1da177e4 LT |
979 | |
980 | line = tty->index; | |
f2cf8e25 AC |
981 | if (line < 0 || line >= nbdevs) |
982 | return -ENODEV; | |
1da177e4 LT |
983 | |
984 | ch = &digi_channels[line]; | |
985 | boardnum = ch->boardnum; | |
986 | ||
987 | /* Check status of board configured in system. */ | |
988 | ||
989 | /* ----------------------------------------------------------------- | |
990 | I check to see if the epca_setup routine detected an user error. | |
991 | It might be better to put this in pc_init, but for the moment it | |
992 | goes here. | |
993 | ---------------------------------------------------------------------- */ | |
994 | ||
f2cf8e25 | 995 | if (invalid_lilo_config) { |
1da177e4 | 996 | if (setup_error_code & INVALID_BOARD_TYPE) |
f2cf8e25 | 997 | printk(KERN_ERR "epca: pc_open: Invalid board type specified in kernel options.\n"); |
1da177e4 | 998 | if (setup_error_code & INVALID_NUM_PORTS) |
f2cf8e25 | 999 | printk(KERN_ERR "epca: pc_open: Invalid number of ports specified in kernel options.\n"); |
1da177e4 | 1000 | if (setup_error_code & INVALID_MEM_BASE) |
f2cf8e25 | 1001 | printk(KERN_ERR "epca: pc_open: Invalid board memory address specified in kernel options.\n"); |
1da177e4 | 1002 | if (setup_error_code & INVALID_PORT_BASE) |
f2cf8e25 | 1003 | printk(KERN_ERR "epca; pc_open: Invalid board port address specified in kernel options.\n"); |
1da177e4 | 1004 | if (setup_error_code & INVALID_BOARD_STATUS) |
f2cf8e25 | 1005 | printk(KERN_ERR "epca: pc_open: Invalid board status specified in kernel options.\n"); |
1da177e4 | 1006 | if (setup_error_code & INVALID_ALTPIN) |
f2cf8e25 | 1007 | printk(KERN_ERR "epca: pc_open: Invalid board altpin specified in kernel options;\n"); |
1da177e4 | 1008 | tty->driver_data = NULL; /* Mark this device as 'down' */ |
f2cf8e25 | 1009 | return -ENODEV; |
1da177e4 | 1010 | } |
f2cf8e25 | 1011 | if (boardnum >= num_cards || boards[boardnum].status == DISABLED) { |
1da177e4 LT |
1012 | tty->driver_data = NULL; /* Mark this device as 'down' */ |
1013 | return(-ENODEV); | |
1014 | } | |
1015 | ||
f2cf8e25 | 1016 | if ((bc = ch->brdchan) == 0) { |
1da177e4 | 1017 | tty->driver_data = NULL; |
f2cf8e25 | 1018 | return -ENODEV; |
1da177e4 LT |
1019 | } |
1020 | ||
f2cf8e25 | 1021 | spin_lock_irqsave(&epca_lock, flags); |
1da177e4 LT |
1022 | /* ------------------------------------------------------------------ |
1023 | Every time a channel is opened, increment a counter. This is | |
1024 | necessary because we do not wish to flush and shutdown the channel | |
1025 | until the last app holding the channel open, closes it. | |
1026 | --------------------------------------------------------------------- */ | |
1da177e4 | 1027 | ch->count++; |
1da177e4 LT |
1028 | /* ---------------------------------------------------------------- |
1029 | Set a kernel structures pointer to our local channel | |
1030 | structure. This way we can get to it when passed only | |
1031 | a tty struct. | |
1032 | ------------------------------------------------------------------ */ | |
1da177e4 | 1033 | tty->driver_data = ch; |
1da177e4 LT |
1034 | /* ---------------------------------------------------------------- |
1035 | If this is the first time the channel has been opened, initialize | |
1036 | the tty->termios struct otherwise let pc_close handle it. | |
1037 | -------------------------------------------------------------------- */ | |
1da177e4 LT |
1038 | globalwinon(ch); |
1039 | ch->statusflags = 0; | |
1040 | ||
1041 | /* Save boards current modem status */ | |
bc9a5154 | 1042 | ch->imodem = readb(&bc->mstat); |
1da177e4 LT |
1043 | |
1044 | /* ---------------------------------------------------------------- | |
1045 | Set receive head and tail ptrs to each other. This indicates | |
1046 | no data available to read. | |
1047 | ----------------------------------------------------------------- */ | |
f2cf8e25 AC |
1048 | head = readw(&bc->rin); |
1049 | writew(head, &bc->rout); | |
1da177e4 LT |
1050 | |
1051 | /* Set the channels associated tty structure */ | |
1052 | ch->tty = tty; | |
1053 | ||
1054 | /* ----------------------------------------------------------------- | |
1055 | The below routine generally sets up parity, baud, flow control | |
1056 | issues, etc.... It effect both control flags and input flags. | |
1057 | -------------------------------------------------------------------- */ | |
1058 | epcaparam(tty,ch); | |
1da177e4 LT |
1059 | ch->asyncflags |= ASYNC_INITIALIZED; |
1060 | memoff(ch); | |
f2cf8e25 | 1061 | spin_unlock_irqrestore(&epca_lock, flags); |
1da177e4 LT |
1062 | |
1063 | retval = block_til_ready(tty, filp, ch); | |
1064 | if (retval) | |
1da177e4 | 1065 | return retval; |
1da177e4 LT |
1066 | /* ------------------------------------------------------------- |
1067 | Set this again in case a hangup set it to zero while this | |
1068 | open() was waiting for the line... | |
1069 | --------------------------------------------------------------- */ | |
f2cf8e25 | 1070 | spin_lock_irqsave(&epca_lock, flags); |
1da177e4 | 1071 | ch->tty = tty; |
1da177e4 | 1072 | globalwinon(ch); |
1da177e4 | 1073 | /* Enable Digi Data events */ |
f2cf8e25 | 1074 | writeb(1, &bc->idata); |
1da177e4 | 1075 | memoff(ch); |
f2cf8e25 | 1076 | spin_unlock_irqrestore(&epca_lock, flags); |
1da177e4 | 1077 | return 0; |
1da177e4 LT |
1078 | } /* End pc_open */ |
1079 | ||
1da177e4 LT |
1080 | static int __init epca_module_init(void) |
1081 | { /* Begin init_module */ | |
f2cf8e25 | 1082 | return pc_init(); |
1da177e4 LT |
1083 | } |
1084 | ||
1085 | module_init(epca_module_init); | |
1da177e4 | 1086 | |
1da177e4 | 1087 | static struct pci_driver epca_driver; |
1da177e4 LT |
1088 | |
1089 | static void __exit epca_module_exit(void) | |
1090 | { | |
1da177e4 LT |
1091 | int count, crd; |
1092 | struct board_info *bd; | |
1093 | struct channel *ch; | |
1da177e4 LT |
1094 | |
1095 | del_timer_sync(&epca_timer); | |
1096 | ||
1da177e4 LT |
1097 | if ((tty_unregister_driver(pc_driver)) || |
1098 | (tty_unregister_driver(pc_info))) | |
1099 | { | |
f2cf8e25 | 1100 | printk(KERN_WARNING "epca: cleanup_module failed to un-register tty driver\n"); |
1da177e4 LT |
1101 | return; |
1102 | } | |
1103 | put_tty_driver(pc_driver); | |
1104 | put_tty_driver(pc_info); | |
1105 | ||
f2cf8e25 | 1106 | for (crd = 0; crd < num_cards; crd++) { /* Begin for each card */ |
1da177e4 | 1107 | bd = &boards[crd]; |
1da177e4 LT |
1108 | if (!bd) |
1109 | { /* Begin sanity check */ | |
1110 | printk(KERN_ERR "<Error> - Digi : cleanup_module failed\n"); | |
1111 | return; | |
1112 | } /* End sanity check */ | |
f2cf8e25 | 1113 | ch = card_ptr[crd]; |
1da177e4 LT |
1114 | for (count = 0; count < bd->numports; count++, ch++) |
1115 | { /* Begin for each port */ | |
b3218a79 JS |
1116 | if (ch && ch->tty) |
1117 | tty_hangup(ch->tty); | |
1da177e4 LT |
1118 | } /* End for each port */ |
1119 | } /* End for each card */ | |
1da177e4 | 1120 | pci_unregister_driver (&epca_driver); |
1da177e4 | 1121 | } |
f2cf8e25 | 1122 | |
1da177e4 | 1123 | module_exit(epca_module_exit); |
1da177e4 | 1124 | |
b68e31d0 | 1125 | static const struct tty_operations pc_ops = { |
1da177e4 LT |
1126 | .open = pc_open, |
1127 | .close = pc_close, | |
1128 | .write = pc_write, | |
1129 | .write_room = pc_write_room, | |
1130 | .flush_buffer = pc_flush_buffer, | |
1131 | .chars_in_buffer = pc_chars_in_buffer, | |
1132 | .flush_chars = pc_flush_chars, | |
1133 | .put_char = pc_put_char, | |
1134 | .ioctl = pc_ioctl, | |
1135 | .set_termios = pc_set_termios, | |
1136 | .stop = pc_stop, | |
1137 | .start = pc_start, | |
1138 | .throttle = pc_throttle, | |
1139 | .unthrottle = pc_unthrottle, | |
1140 | .hangup = pc_hangup, | |
1141 | }; | |
1142 | ||
1143 | static int info_open(struct tty_struct *tty, struct file * filp) | |
1144 | { | |
1145 | return 0; | |
1146 | } | |
1147 | ||
1148 | static struct tty_operations info_ops = { | |
1149 | .open = info_open, | |
1150 | .ioctl = info_ioctl, | |
1151 | }; | |
1152 | ||
1153 | /* ------------------ Begin pc_init ---------------------- */ | |
1154 | ||
f2cf8e25 | 1155 | static int __init pc_init(void) |
1da177e4 | 1156 | { /* Begin pc_init */ |
1da177e4 LT |
1157 | int crd; |
1158 | struct board_info *bd; | |
1159 | unsigned char board_id = 0; | |
dabad056 | 1160 | int err = -ENOMEM; |
1da177e4 | 1161 | |
1da177e4 LT |
1162 | int pci_boards_found, pci_count; |
1163 | ||
1164 | pci_count = 0; | |
1da177e4 LT |
1165 | |
1166 | pc_driver = alloc_tty_driver(MAX_ALLOC); | |
1167 | if (!pc_driver) | |
dabad056 | 1168 | goto out1; |
1da177e4 LT |
1169 | |
1170 | pc_info = alloc_tty_driver(MAX_ALLOC); | |
dabad056 AM |
1171 | if (!pc_info) |
1172 | goto out2; | |
1da177e4 LT |
1173 | |
1174 | /* ----------------------------------------------------------------------- | |
1175 | If epca_setup has not been ran by LILO set num_cards to defaults; copy | |
1176 | board structure defined by digiConfig into drivers board structure. | |
1177 | Note : If LILO has ran epca_setup then epca_setup will handle defining | |
1178 | num_cards as well as copying the data into the board structure. | |
1179 | -------------------------------------------------------------------------- */ | |
f2cf8e25 | 1180 | if (!liloconfig) { /* Begin driver has been configured via. epcaconfig */ |
1da177e4 LT |
1181 | |
1182 | nbdevs = NBDEVS; | |
1183 | num_cards = NUMCARDS; | |
1184 | memcpy((void *)&boards, (void *)&static_boards, | |
1185 | (sizeof(struct board_info) * NUMCARDS)); | |
1186 | } /* End driver has been configured via. epcaconfig */ | |
1187 | ||
1188 | /* ----------------------------------------------------------------- | |
1189 | Note : If lilo was used to configure the driver and the | |
1190 | ignore epcaconfig option was choosen (digiepca=2) then | |
1191 | nbdevs and num_cards will equal 0 at this point. This is | |
1192 | okay; PCI cards will still be picked up if detected. | |
1193 | --------------------------------------------------------------------- */ | |
1194 | ||
1195 | /* ----------------------------------------------------------- | |
1196 | Set up interrupt, we will worry about memory allocation in | |
1197 | post_fep_init. | |
1198 | --------------------------------------------------------------- */ | |
1199 | ||
1200 | ||
1201 | printk(KERN_INFO "DIGI epca driver version %s loaded.\n",VERSION); | |
1202 | ||
1da177e4 LT |
1203 | /* ------------------------------------------------------------------ |
1204 | NOTE : This code assumes that the number of ports found in | |
1205 | the boards array is correct. This could be wrong if | |
1206 | the card in question is PCI (And therefore has no ports | |
1207 | entry in the boards structure.) The rest of the | |
1208 | information will be valid for PCI because the beginning | |
1209 | of pc_init scans for PCI and determines i/o and base | |
1210 | memory addresses. I am not sure if it is possible to | |
1211 | read the number of ports supported by the card prior to | |
1212 | it being booted (Since that is the state it is in when | |
1213 | pc_init is run). Because it is not possible to query the | |
1214 | number of supported ports until after the card has booted; | |
1215 | we are required to calculate the card_ptrs as the card is | |
1216 | is initialized (Inside post_fep_init). The negative thing | |
1217 | about this approach is that digiDload's call to GET_INFO | |
1218 | will have a bad port value. (Since this is called prior | |
1219 | to post_fep_init.) | |
1220 | ||
1221 | --------------------------------------------------------------------- */ | |
1222 | ||
1223 | pci_boards_found = 0; | |
1224 | if(num_cards < MAXBOARDS) | |
1225 | pci_boards_found += init_PCI(); | |
1226 | num_cards += pci_boards_found; | |
1227 | ||
1da177e4 LT |
1228 | pc_driver->owner = THIS_MODULE; |
1229 | pc_driver->name = "ttyD"; | |
1da177e4 LT |
1230 | pc_driver->major = DIGI_MAJOR; |
1231 | pc_driver->minor_start = 0; | |
1232 | pc_driver->type = TTY_DRIVER_TYPE_SERIAL; | |
1233 | pc_driver->subtype = SERIAL_TYPE_NORMAL; | |
1234 | pc_driver->init_termios = tty_std_termios; | |
1235 | pc_driver->init_termios.c_iflag = 0; | |
1236 | pc_driver->init_termios.c_oflag = 0; | |
1237 | pc_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL; | |
1238 | pc_driver->init_termios.c_lflag = 0; | |
606d099c AC |
1239 | pc_driver->init_termios.c_ispeed = 9600; |
1240 | pc_driver->init_termios.c_ospeed = 9600; | |
1da177e4 LT |
1241 | pc_driver->flags = TTY_DRIVER_REAL_RAW; |
1242 | tty_set_operations(pc_driver, &pc_ops); | |
1243 | ||
1244 | pc_info->owner = THIS_MODULE; | |
1245 | pc_info->name = "digi_ctl"; | |
1246 | pc_info->major = DIGIINFOMAJOR; | |
1247 | pc_info->minor_start = 0; | |
1248 | pc_info->type = TTY_DRIVER_TYPE_SERIAL; | |
1249 | pc_info->subtype = SERIAL_TYPE_INFO; | |
1250 | pc_info->init_termios = tty_std_termios; | |
1251 | pc_info->init_termios.c_iflag = 0; | |
1252 | pc_info->init_termios.c_oflag = 0; | |
1253 | pc_info->init_termios.c_lflag = 0; | |
1254 | pc_info->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL; | |
606d099c AC |
1255 | pc_info->init_termios.c_ispeed = 9600; |
1256 | pc_info->init_termios.c_ospeed = 9600; | |
1da177e4 LT |
1257 | pc_info->flags = TTY_DRIVER_REAL_RAW; |
1258 | tty_set_operations(pc_info, &info_ops); | |
1259 | ||
1260 | ||
1da177e4 LT |
1261 | for (crd = 0; crd < num_cards; crd++) |
1262 | { /* Begin for each card */ | |
1263 | ||
1264 | /* ------------------------------------------------------------------ | |
1265 | This is where the appropriate memory handlers for the hardware is | |
1266 | set. Everything at runtime blindly jumps through these vectors. | |
1267 | ---------------------------------------------------------------------- */ | |
1268 | ||
1269 | /* defined in epcaconfig.h */ | |
1270 | bd = &boards[crd]; | |
1271 | ||
1272 | switch (bd->type) | |
1273 | { /* Begin switch on bd->type {board type} */ | |
1274 | case PCXEM: | |
1275 | case EISAXEM: | |
1276 | bd->memwinon = pcxem_memwinon ; | |
1277 | bd->memwinoff = pcxem_memwinoff ; | |
1278 | bd->globalwinon = pcxem_globalwinon ; | |
1279 | bd->txwinon = pcxem_txwinon ; | |
1280 | bd->rxwinon = pcxem_rxwinon ; | |
1281 | bd->memoff = pcxem_memoff ; | |
1282 | bd->assertgwinon = dummy_assertgwinon; | |
1283 | bd->assertmemoff = dummy_assertmemoff; | |
1284 | break; | |
1285 | ||
1286 | case PCIXEM: | |
1287 | case PCIXRJ: | |
1288 | case PCIXR: | |
1289 | bd->memwinon = dummy_memwinon; | |
1290 | bd->memwinoff = dummy_memwinoff; | |
1291 | bd->globalwinon = dummy_globalwinon; | |
1292 | bd->txwinon = dummy_txwinon; | |
1293 | bd->rxwinon = dummy_rxwinon; | |
1294 | bd->memoff = dummy_memoff; | |
1295 | bd->assertgwinon = dummy_assertgwinon; | |
1296 | bd->assertmemoff = dummy_assertmemoff; | |
1297 | break; | |
1298 | ||
1299 | case PCXE: | |
1300 | case PCXEVE: | |
1301 | ||
1302 | bd->memwinon = pcxe_memwinon; | |
1303 | bd->memwinoff = pcxe_memwinoff; | |
1304 | bd->globalwinon = pcxe_globalwinon; | |
1305 | bd->txwinon = pcxe_txwinon; | |
1306 | bd->rxwinon = pcxe_rxwinon; | |
1307 | bd->memoff = pcxe_memoff; | |
1308 | bd->assertgwinon = dummy_assertgwinon; | |
1309 | bd->assertmemoff = dummy_assertmemoff; | |
1310 | break; | |
1311 | ||
1312 | case PCXI: | |
1313 | case PC64XE: | |
1314 | ||
1315 | bd->memwinon = pcxi_memwinon; | |
1316 | bd->memwinoff = pcxi_memwinoff; | |
1317 | bd->globalwinon = pcxi_globalwinon; | |
1318 | bd->txwinon = pcxi_txwinon; | |
1319 | bd->rxwinon = pcxi_rxwinon; | |
1320 | bd->memoff = pcxi_memoff; | |
1321 | bd->assertgwinon = pcxi_assertgwinon; | |
1322 | bd->assertmemoff = pcxi_assertmemoff; | |
1323 | break; | |
1324 | ||
1325 | default: | |
1326 | break; | |
1327 | ||
1328 | } /* End switch on bd->type */ | |
1329 | ||
1330 | /* --------------------------------------------------------------- | |
1331 | Some cards need a memory segment to be defined for use in | |
1332 | transmit and receive windowing operations. These boards | |
1333 | are listed in the below switch. In the case of the XI the | |
1334 | amount of memory on the board is variable so the memory_seg | |
1335 | is also variable. This code determines what they segment | |
1336 | should be. | |
1337 | ----------------------------------------------------------------- */ | |
1338 | ||
1339 | switch (bd->type) | |
1340 | { /* Begin switch on bd->type {board type} */ | |
1341 | ||
1342 | case PCXE: | |
1343 | case PCXEVE: | |
1344 | case PC64XE: | |
1345 | bd->memory_seg = 0xf000; | |
1346 | break; | |
1347 | ||
1348 | case PCXI: | |
1349 | board_id = inb((int)bd->port); | |
1350 | if ((board_id & 0x1) == 0x1) | |
1351 | { /* Begin it's an XI card */ | |
1352 | ||
1353 | /* Is it a 64K board */ | |
1354 | if ((board_id & 0x30) == 0) | |
1355 | bd->memory_seg = 0xf000; | |
1356 | ||
1357 | /* Is it a 128K board */ | |
1358 | if ((board_id & 0x30) == 0x10) | |
1359 | bd->memory_seg = 0xe000; | |
1360 | ||
1361 | /* Is is a 256K board */ | |
1362 | if ((board_id & 0x30) == 0x20) | |
1363 | bd->memory_seg = 0xc000; | |
1364 | ||
1365 | /* Is it a 512K board */ | |
1366 | if ((board_id & 0x30) == 0x30) | |
1367 | bd->memory_seg = 0x8000; | |
1368 | ||
f2cf8e25 | 1369 | } else printk(KERN_ERR "epca: Board at 0x%x doesn't appear to be an XI\n",(int)bd->port); |
1da177e4 LT |
1370 | break; |
1371 | ||
1372 | } /* End switch on bd->type */ | |
1373 | ||
1374 | } /* End for each card */ | |
1375 | ||
dabad056 AM |
1376 | err = tty_register_driver(pc_driver); |
1377 | if (err) { | |
1378 | printk(KERN_ERR "Couldn't register Digi PC/ driver"); | |
1379 | goto out3; | |
1380 | } | |
1da177e4 | 1381 | |
dabad056 AM |
1382 | err = tty_register_driver(pc_info); |
1383 | if (err) { | |
1384 | printk(KERN_ERR "Couldn't register Digi PC/ info "); | |
1385 | goto out4; | |
1386 | } | |
1da177e4 LT |
1387 | |
1388 | /* ------------------------------------------------------------------- | |
1389 | Start up the poller to check for events on all enabled boards | |
1390 | ---------------------------------------------------------------------- */ | |
1391 | ||
1392 | init_timer(&epca_timer); | |
1393 | epca_timer.function = epcapoll; | |
1394 | mod_timer(&epca_timer, jiffies + HZ/25); | |
1da177e4 LT |
1395 | return 0; |
1396 | ||
dabad056 AM |
1397 | out4: |
1398 | tty_unregister_driver(pc_driver); | |
1399 | out3: | |
1400 | put_tty_driver(pc_info); | |
1401 | out2: | |
1402 | put_tty_driver(pc_driver); | |
1403 | out1: | |
1404 | return err; | |
1405 | ||
1da177e4 LT |
1406 | } /* End pc_init */ |
1407 | ||
1408 | /* ------------------ Begin post_fep_init ---------------------- */ | |
1409 | ||
1410 | static void post_fep_init(unsigned int crd) | |
1411 | { /* Begin post_fep_init */ | |
1412 | ||
1413 | int i; | |
bc9a5154 AV |
1414 | void __iomem *memaddr; |
1415 | struct global_data __iomem *gd; | |
1da177e4 | 1416 | struct board_info *bd; |
bc9a5154 | 1417 | struct board_chan __iomem *bc; |
1da177e4 LT |
1418 | struct channel *ch; |
1419 | int shrinkmem = 0, lowwater ; | |
1420 | ||
1421 | /* ------------------------------------------------------------- | |
1422 | This call is made by the user via. the ioctl call DIGI_INIT. | |
1423 | It is responsible for setting up all the card specific stuff. | |
1424 | ---------------------------------------------------------------- */ | |
1425 | bd = &boards[crd]; | |
1426 | ||
1427 | /* ----------------------------------------------------------------- | |
1428 | If this is a PCI board, get the port info. Remember PCI cards | |
1429 | do not have entries into the epcaconfig.h file, so we can't get | |
1430 | the number of ports from it. Unfortunetly, this means that anyone | |
1431 | doing a DIGI_GETINFO before the board has booted will get an invalid | |
1432 | number of ports returned (It should return 0). Calls to DIGI_GETINFO | |
1433 | after DIGI_INIT has been called will return the proper values. | |
1434 | ------------------------------------------------------------------- */ | |
1435 | ||
f2cf8e25 | 1436 | if (bd->type >= PCIXEM) { /* Begin get PCI number of ports */ |
1da177e4 LT |
1437 | /* -------------------------------------------------------------------- |
1438 | Below we use XEMPORTS as a memory offset regardless of which PCI | |
1439 | card it is. This is because all of the supported PCI cards have | |
1440 | the same memory offset for the channel data. This will have to be | |
1441 | changed if we ever develop a PCI/XE card. NOTE : The FEP manual | |
1442 | states that the port offset is 0xC22 as opposed to 0xC02. This is | |
1443 | only true for PC/XE, and PC/XI cards; not for the XEM, or CX series. | |
1444 | On the PCI cards the number of ports is determined by reading a | |
1445 | ID PROM located in the box attached to the card. The card can then | |
1446 | determine the index the id to determine the number of ports available. | |
1447 | (FYI - The id should be located at 0x1ac (And may use up to 4 bytes | |
1448 | if the box in question is a XEM or CX)). | |
1449 | ------------------------------------------------------------------------ */ | |
f2cf8e25 AC |
1450 | /* PCI cards are already remapped at this point ISA are not */ |
1451 | bd->numports = readw(bd->re_map_membase + XEMPORTS); | |
1da177e4 LT |
1452 | epcaassert(bd->numports <= 64,"PCI returned a invalid number of ports"); |
1453 | nbdevs += (bd->numports); | |
f2cf8e25 AC |
1454 | } else { |
1455 | /* Fix up the mappings for ISA/EISA etc */ | |
1456 | /* FIXME: 64K - can we be smarter ? */ | |
1457 | bd->re_map_membase = ioremap(bd->membase, 0x10000); | |
1458 | } | |
1da177e4 LT |
1459 | |
1460 | if (crd != 0) | |
1461 | card_ptr[crd] = card_ptr[crd-1] + boards[crd-1].numports; | |
1462 | else | |
1463 | card_ptr[crd] = &digi_channels[crd]; /* <- For card 0 only */ | |
1464 | ||
1465 | ch = card_ptr[crd]; | |
1da177e4 LT |
1466 | epcaassert(ch <= &digi_channels[nbdevs - 1], "ch out of range"); |
1467 | ||
f2cf8e25 | 1468 | memaddr = bd->re_map_membase; |
1da177e4 LT |
1469 | |
1470 | /* ----------------------------------------------------------------- | |
1471 | The below assignment will set bc to point at the BEGINING of | |
1472 | the cards channel structures. For 1 card there will be between | |
1473 | 8 and 64 of these structures. | |
1474 | -------------------------------------------------------------------- */ | |
1475 | ||
bc9a5154 | 1476 | bc = memaddr + CHANSTRUCT; |
1da177e4 LT |
1477 | |
1478 | /* ------------------------------------------------------------------- | |
1479 | The below assignment will set gd to point at the BEGINING of | |
1480 | global memory address 0xc00. The first data in that global | |
1481 | memory actually starts at address 0xc1a. The command in | |
1482 | pointer begins at 0xd10. | |
1483 | ---------------------------------------------------------------------- */ | |
1484 | ||
bc9a5154 | 1485 | gd = memaddr + GLOBAL; |
1da177e4 LT |
1486 | |
1487 | /* -------------------------------------------------------------------- | |
1488 | XEPORTS (address 0xc22) points at the number of channels the | |
1489 | card supports. (For 64XE, XI, XEM, and XR use 0xc02) | |
1490 | ----------------------------------------------------------------------- */ | |
1491 | ||
f2cf8e25 | 1492 | if ((bd->type == PCXEVE || bd->type == PCXE) && (readw(memaddr + XEPORTS) < 3)) |
1da177e4 LT |
1493 | shrinkmem = 1; |
1494 | if (bd->type < PCIXEM) | |
1495 | if (!request_region((int)bd->port, 4, board_desc[bd->type])) | |
1496 | return; | |
1da177e4 LT |
1497 | memwinon(bd, 0); |
1498 | ||
1499 | /* -------------------------------------------------------------------- | |
1500 | Remember ch is the main drivers channels structure, while bc is | |
1501 | the cards channel structure. | |
1502 | ------------------------------------------------------------------------ */ | |
1503 | ||
1504 | /* For every port on the card do ..... */ | |
1505 | ||
f2cf8e25 AC |
1506 | for (i = 0; i < bd->numports; i++, ch++, bc++) { /* Begin for each port */ |
1507 | unsigned long flags; | |
bc9a5154 | 1508 | u16 tseg, rseg; |
1da177e4 LT |
1509 | |
1510 | ch->brdchan = bc; | |
1511 | ch->mailbox = gd; | |
c4028958 | 1512 | INIT_WORK(&ch->tqueue, do_softint); |
1da177e4 LT |
1513 | ch->board = &boards[crd]; |
1514 | ||
f2cf8e25 AC |
1515 | spin_lock_irqsave(&epca_lock, flags); |
1516 | switch (bd->type) { | |
1da177e4 LT |
1517 | /* ---------------------------------------------------------------- |
1518 | Since some of the boards use different bitmaps for their | |
1519 | control signals we cannot hard code these values and retain | |
1520 | portability. We virtualize this data here. | |
1521 | ------------------------------------------------------------------- */ | |
1522 | case EISAXEM: | |
1523 | case PCXEM: | |
1524 | case PCIXEM: | |
1525 | case PCIXRJ: | |
1526 | case PCIXR: | |
1527 | ch->m_rts = 0x02 ; | |
1528 | ch->m_dcd = 0x80 ; | |
1529 | ch->m_dsr = 0x20 ; | |
1530 | ch->m_cts = 0x10 ; | |
1531 | ch->m_ri = 0x40 ; | |
1532 | ch->m_dtr = 0x01 ; | |
1533 | break; | |
1534 | ||
1535 | case PCXE: | |
1536 | case PCXEVE: | |
1537 | case PCXI: | |
1538 | case PC64XE: | |
1539 | ch->m_rts = 0x02 ; | |
1540 | ch->m_dcd = 0x08 ; | |
1541 | ch->m_dsr = 0x10 ; | |
1542 | ch->m_cts = 0x20 ; | |
1543 | ch->m_ri = 0x40 ; | |
1544 | ch->m_dtr = 0x80 ; | |
1545 | break; | |
1546 | ||
1547 | } /* End switch bd->type */ | |
1548 | ||
f2cf8e25 | 1549 | if (boards[crd].altpin) { |
1da177e4 LT |
1550 | ch->dsr = ch->m_dcd; |
1551 | ch->dcd = ch->m_dsr; | |
1552 | ch->digiext.digi_flags |= DIGI_ALTPIN; | |
1553 | } | |
f2cf8e25 | 1554 | else { |
1da177e4 LT |
1555 | ch->dcd = ch->m_dcd; |
1556 | ch->dsr = ch->m_dsr; | |
1557 | } | |
1558 | ||
1559 | ch->boardnum = crd; | |
1560 | ch->channelnum = i; | |
1561 | ch->magic = EPCA_MAGIC; | |
1562 | ch->tty = NULL; | |
1563 | ||
f2cf8e25 | 1564 | if (shrinkmem) { |
1da177e4 LT |
1565 | fepcmd(ch, SETBUFFER, 32, 0, 0, 0); |
1566 | shrinkmem = 0; | |
1567 | } | |
1568 | ||
bc9a5154 AV |
1569 | tseg = readw(&bc->tseg); |
1570 | rseg = readw(&bc->rseg); | |
1571 | ||
f2cf8e25 | 1572 | switch (bd->type) { |
1da177e4 LT |
1573 | |
1574 | case PCIXEM: | |
1575 | case PCIXRJ: | |
1576 | case PCIXR: | |
1577 | /* Cover all the 2MEG cards */ | |
bc9a5154 AV |
1578 | ch->txptr = memaddr + ((tseg << 4) & 0x1fffff); |
1579 | ch->rxptr = memaddr + ((rseg << 4) & 0x1fffff); | |
1580 | ch->txwin = FEPWIN | (tseg >> 11); | |
1581 | ch->rxwin = FEPWIN | (rseg >> 11); | |
1da177e4 LT |
1582 | break; |
1583 | ||
1584 | case PCXEM: | |
1585 | case EISAXEM: | |
1586 | /* Cover all the 32K windowed cards */ | |
1587 | /* Mask equal to window size - 1 */ | |
bc9a5154 AV |
1588 | ch->txptr = memaddr + ((tseg << 4) & 0x7fff); |
1589 | ch->rxptr = memaddr + ((rseg << 4) & 0x7fff); | |
1590 | ch->txwin = FEPWIN | (tseg >> 11); | |
1591 | ch->rxwin = FEPWIN | (rseg >> 11); | |
1da177e4 LT |
1592 | break; |
1593 | ||
1594 | case PCXEVE: | |
1595 | case PCXE: | |
bc9a5154 AV |
1596 | ch->txptr = memaddr + (((tseg - bd->memory_seg) << 4) & 0x1fff); |
1597 | ch->txwin = FEPWIN | ((tseg - bd->memory_seg) >> 9); | |
1598 | ch->rxptr = memaddr + (((rseg - bd->memory_seg) << 4) & 0x1fff); | |
1599 | ch->rxwin = FEPWIN | ((rseg - bd->memory_seg) >>9 ); | |
1da177e4 LT |
1600 | break; |
1601 | ||
1602 | case PCXI: | |
1603 | case PC64XE: | |
bc9a5154 AV |
1604 | ch->txptr = memaddr + ((tseg - bd->memory_seg) << 4); |
1605 | ch->rxptr = memaddr + ((rseg - bd->memory_seg) << 4); | |
1da177e4 LT |
1606 | ch->txwin = ch->rxwin = 0; |
1607 | break; | |
1608 | ||
1609 | } /* End switch bd->type */ | |
1610 | ||
1611 | ch->txbufhead = 0; | |
bc9a5154 | 1612 | ch->txbufsize = readw(&bc->tmax) + 1; |
1da177e4 LT |
1613 | |
1614 | ch->rxbufhead = 0; | |
bc9a5154 | 1615 | ch->rxbufsize = readw(&bc->rmax) + 1; |
1da177e4 LT |
1616 | |
1617 | lowwater = ch->txbufsize >= 2000 ? 1024 : (ch->txbufsize / 2); | |
1618 | ||
1619 | /* Set transmitter low water mark */ | |
1620 | fepcmd(ch, STXLWATER, lowwater, 0, 10, 0); | |
1621 | ||
1622 | /* Set receiver low water mark */ | |
1623 | ||
1624 | fepcmd(ch, SRXLWATER, (ch->rxbufsize / 4), 0, 10, 0); | |
1625 | ||
1626 | /* Set receiver high water mark */ | |
1627 | ||
1628 | fepcmd(ch, SRXHWATER, (3 * ch->rxbufsize / 4), 0, 10, 0); | |
1629 | ||
f2cf8e25 AC |
1630 | writew(100, &bc->edelay); |
1631 | writeb(1, &bc->idata); | |
1da177e4 | 1632 | |
f2cf8e25 AC |
1633 | ch->startc = readb(&bc->startc); |
1634 | ch->stopc = readb(&bc->stopc); | |
1635 | ch->startca = readb(&bc->startca); | |
1636 | ch->stopca = readb(&bc->stopca); | |
1da177e4 LT |
1637 | |
1638 | ch->fepcflag = 0; | |
1639 | ch->fepiflag = 0; | |
1640 | ch->fepoflag = 0; | |
1641 | ch->fepstartc = 0; | |
1642 | ch->fepstopc = 0; | |
1643 | ch->fepstartca = 0; | |
1644 | ch->fepstopca = 0; | |
1645 | ||
1646 | ch->close_delay = 50; | |
1647 | ch->count = 0; | |
1648 | ch->blocked_open = 0; | |
1649 | init_waitqueue_head(&ch->open_wait); | |
1650 | init_waitqueue_head(&ch->close_wait); | |
f2cf8e25 AC |
1651 | |
1652 | spin_unlock_irqrestore(&epca_lock, flags); | |
1da177e4 LT |
1653 | } /* End for each port */ |
1654 | ||
1655 | printk(KERN_INFO | |
1656 | "Digi PC/Xx Driver V%s: %s I/O = 0x%lx Mem = 0x%lx Ports = %d\n", | |
1657 | VERSION, board_desc[bd->type], (long)bd->port, (long)bd->membase, bd->numports); | |
1da177e4 LT |
1658 | memwinoff(bd, 0); |
1659 | ||
1660 | } /* End post_fep_init */ | |
1661 | ||
1662 | /* --------------------- Begin epcapoll ------------------------ */ | |
1663 | ||
1664 | static void epcapoll(unsigned long ignored) | |
1665 | { /* Begin epcapoll */ | |
1666 | ||
1667 | unsigned long flags; | |
1668 | int crd; | |
1669 | volatile unsigned int head, tail; | |
1670 | struct channel *ch; | |
1671 | struct board_info *bd; | |
1672 | ||
1673 | /* ------------------------------------------------------------------- | |
1674 | This routine is called upon every timer interrupt. Even though | |
1675 | the Digi series cards are capable of generating interrupts this | |
1676 | method of non-looping polling is more efficient. This routine | |
1677 | checks for card generated events (Such as receive data, are transmit | |
1678 | buffer empty) and acts on those events. | |
1679 | ----------------------------------------------------------------------- */ | |
1680 | ||
1da177e4 LT |
1681 | for (crd = 0; crd < num_cards; crd++) |
1682 | { /* Begin for each card */ | |
1683 | ||
1684 | bd = &boards[crd]; | |
1685 | ch = card_ptr[crd]; | |
1686 | ||
1687 | if ((bd->status == DISABLED) || digi_poller_inhibited) | |
1688 | continue; /* Begin loop next interation */ | |
1689 | ||
1690 | /* ----------------------------------------------------------- | |
1691 | assertmemoff is not needed here; indeed it is an empty subroutine. | |
1692 | It is being kept because future boards may need this as well as | |
1693 | some legacy boards. | |
1694 | ---------------------------------------------------------------- */ | |
1695 | ||
f2cf8e25 AC |
1696 | spin_lock_irqsave(&epca_lock, flags); |
1697 | ||
1da177e4 LT |
1698 | assertmemoff(ch); |
1699 | ||
1700 | globalwinon(ch); | |
1701 | ||
1702 | /* --------------------------------------------------------------- | |
1703 | In this case head and tail actually refer to the event queue not | |
1704 | the transmit or receive queue. | |
1705 | ------------------------------------------------------------------- */ | |
1706 | ||
f2cf8e25 AC |
1707 | head = readw(&ch->mailbox->ein); |
1708 | tail = readw(&ch->mailbox->eout); | |
1da177e4 LT |
1709 | |
1710 | /* If head isn't equal to tail we have an event */ | |
1711 | ||
1712 | if (head != tail) | |
1713 | doevent(crd); | |
1da177e4 LT |
1714 | memoff(ch); |
1715 | ||
f2cf8e25 | 1716 | spin_unlock_irqrestore(&epca_lock, flags); |
1da177e4 | 1717 | |
f2cf8e25 | 1718 | } /* End for each card */ |
1da177e4 | 1719 | mod_timer(&epca_timer, jiffies + (HZ / 25)); |
1da177e4 LT |
1720 | } /* End epcapoll */ |
1721 | ||
1722 | /* --------------------- Begin doevent ------------------------ */ | |
1723 | ||
1724 | static void doevent(int crd) | |
1725 | { /* Begin doevent */ | |
1726 | ||
bc9a5154 | 1727 | void __iomem *eventbuf; |
1da177e4 LT |
1728 | struct channel *ch, *chan0; |
1729 | static struct tty_struct *tty; | |
f2cf8e25 | 1730 | struct board_info *bd; |
bc9a5154 | 1731 | struct board_chan __iomem *bc; |
f2cf8e25 AC |
1732 | unsigned int tail, head; |
1733 | int event, channel; | |
1734 | int mstat, lstat; | |
1da177e4 LT |
1735 | |
1736 | /* ------------------------------------------------------------------- | |
1737 | This subroutine is called by epcapoll when an event is detected | |
1738 | in the event queue. This routine responds to those events. | |
1739 | --------------------------------------------------------------------- */ | |
1da177e4 LT |
1740 | bd = &boards[crd]; |
1741 | ||
1742 | chan0 = card_ptr[crd]; | |
1743 | epcaassert(chan0 <= &digi_channels[nbdevs - 1], "ch out of range"); | |
1da177e4 | 1744 | assertgwinon(chan0); |
f2cf8e25 | 1745 | while ((tail = readw(&chan0->mailbox->eout)) != (head = readw(&chan0->mailbox->ein))) |
1da177e4 | 1746 | { /* Begin while something in event queue */ |
1da177e4 | 1747 | assertgwinon(chan0); |
f2cf8e25 | 1748 | eventbuf = bd->re_map_membase + tail + ISTART; |
1da177e4 | 1749 | /* Get the channel the event occurred on */ |
f2cf8e25 | 1750 | channel = readb(eventbuf); |
1da177e4 | 1751 | /* Get the actual event code that occurred */ |
f2cf8e25 | 1752 | event = readb(eventbuf + 1); |
1da177e4 LT |
1753 | /* ---------------------------------------------------------------- |
1754 | The two assignments below get the current modem status (mstat) | |
1755 | and the previous modem status (lstat). These are useful becuase | |
1756 | an event could signal a change in modem signals itself. | |
1757 | ------------------------------------------------------------------- */ | |
f2cf8e25 AC |
1758 | mstat = readb(eventbuf + 2); |
1759 | lstat = readb(eventbuf + 3); | |
1da177e4 LT |
1760 | |
1761 | ch = chan0 + channel; | |
f2cf8e25 | 1762 | if ((unsigned)channel >= bd->numports || !ch) { |
1da177e4 LT |
1763 | if (channel >= bd->numports) |
1764 | ch = chan0; | |
1765 | bc = ch->brdchan; | |
1766 | goto next; | |
1767 | } | |
1768 | ||
1769 | if ((bc = ch->brdchan) == NULL) | |
1770 | goto next; | |
1771 | ||
f2cf8e25 | 1772 | if (event & DATA_IND) { /* Begin DATA_IND */ |
1da177e4 LT |
1773 | receive_data(ch); |
1774 | assertgwinon(ch); | |
1da177e4 LT |
1775 | } /* End DATA_IND */ |
1776 | /* else *//* Fix for DCD transition missed bug */ | |
f2cf8e25 | 1777 | if (event & MODEMCHG_IND) { /* Begin MODEMCHG_IND */ |
1da177e4 | 1778 | /* A modem signal change has been indicated */ |
1da177e4 | 1779 | ch->imodem = mstat; |
f2cf8e25 | 1780 | if (ch->asyncflags & ASYNC_CHECK_CD) { |
1da177e4 LT |
1781 | if (mstat & ch->dcd) /* We are now receiving dcd */ |
1782 | wake_up_interruptible(&ch->open_wait); | |
1783 | else | |
1784 | pc_sched_event(ch, EPCA_EVENT_HANGUP); /* No dcd; hangup */ | |
1785 | } | |
1da177e4 | 1786 | } /* End MODEMCHG_IND */ |
1da177e4 | 1787 | tty = ch->tty; |
f2cf8e25 AC |
1788 | if (tty) { /* Begin if valid tty */ |
1789 | if (event & BREAK_IND) { /* Begin if BREAK_IND */ | |
1da177e4 | 1790 | /* A break has been indicated */ |
33f0f88f | 1791 | tty_insert_flip_char(tty, 0, TTY_BREAK); |
1da177e4 | 1792 | tty_schedule_flip(tty); |
f2cf8e25 | 1793 | } else if (event & LOWTX_IND) { /* Begin LOWTX_IND */ |
1da177e4 LT |
1794 | if (ch->statusflags & LOWWAIT) |
1795 | { /* Begin if LOWWAIT */ | |
1da177e4 LT |
1796 | ch->statusflags &= ~LOWWAIT; |
1797 | tty_wakeup(tty); | |
1798 | wake_up_interruptible(&tty->write_wait); | |
1da177e4 | 1799 | } /* End if LOWWAIT */ |
f2cf8e25 | 1800 | } else if (event & EMPTYTX_IND) { /* Begin EMPTYTX_IND */ |
1da177e4 | 1801 | /* This event is generated by setup_empty_event */ |
1da177e4 | 1802 | ch->statusflags &= ~TXBUSY; |
f2cf8e25 | 1803 | if (ch->statusflags & EMPTYWAIT) { /* Begin if EMPTYWAIT */ |
1da177e4 LT |
1804 | ch->statusflags &= ~EMPTYWAIT; |
1805 | tty_wakeup(tty); | |
1da177e4 | 1806 | wake_up_interruptible(&tty->write_wait); |
1da177e4 | 1807 | } /* End if EMPTYWAIT */ |
1da177e4 | 1808 | } /* End EMPTYTX_IND */ |
1da177e4 | 1809 | } /* End if valid tty */ |
1da177e4 LT |
1810 | next: |
1811 | globalwinon(ch); | |
f2cf8e25 AC |
1812 | BUG_ON(!bc); |
1813 | writew(1, &bc->idata); | |
1814 | writew((tail + 4) & (IMAX - ISTART - 4), &chan0->mailbox->eout); | |
1da177e4 | 1815 | globalwinon(chan0); |
1da177e4 | 1816 | } /* End while something in event queue */ |
1da177e4 LT |
1817 | } /* End doevent */ |
1818 | ||
1819 | /* --------------------- Begin fepcmd ------------------------ */ | |
1820 | ||
1821 | static void fepcmd(struct channel *ch, int cmd, int word_or_byte, | |
1822 | int byte2, int ncmds, int bytecmd) | |
1823 | { /* Begin fepcmd */ | |
bc9a5154 | 1824 | unchar __iomem *memaddr; |
1da177e4 LT |
1825 | unsigned int head, cmdTail, cmdStart, cmdMax; |
1826 | long count; | |
1827 | int n; | |
1828 | ||
1829 | /* This is the routine in which commands may be passed to the card. */ | |
1830 | ||
1831 | if (ch->board->status == DISABLED) | |
1da177e4 | 1832 | return; |
1da177e4 | 1833 | assertgwinon(ch); |
1da177e4 | 1834 | /* Remember head (As well as max) is just an offset not a base addr */ |
f2cf8e25 | 1835 | head = readw(&ch->mailbox->cin); |
1da177e4 | 1836 | /* cmdStart is a base address */ |
f2cf8e25 | 1837 | cmdStart = readw(&ch->mailbox->cstart); |
1da177e4 LT |
1838 | /* ------------------------------------------------------------------ |
1839 | We do the addition below because we do not want a max pointer | |
1840 | relative to cmdStart. We want a max pointer that points at the | |
1841 | physical end of the command queue. | |
1842 | -------------------------------------------------------------------- */ | |
f2cf8e25 | 1843 | cmdMax = (cmdStart + 4 + readw(&ch->mailbox->cmax)); |
1da177e4 LT |
1844 | memaddr = ch->board->re_map_membase; |
1845 | ||
f2cf8e25 AC |
1846 | if (head >= (cmdMax - cmdStart) || (head & 03)) { |
1847 | printk(KERN_ERR "line %d: Out of range, cmd = %x, head = %x\n", __LINE__, cmd, head); | |
1848 | printk(KERN_ERR "line %d: Out of range, cmdMax = %x, cmdStart = %x\n", __LINE__, cmdMax, cmdStart); | |
1da177e4 LT |
1849 | return; |
1850 | } | |
f2cf8e25 AC |
1851 | if (bytecmd) { |
1852 | writeb(cmd, memaddr + head + cmdStart + 0); | |
1853 | writeb(ch->channelnum, memaddr + head + cmdStart + 1); | |
1da177e4 | 1854 | /* Below word_or_byte is bits to set */ |
f2cf8e25 | 1855 | writeb(word_or_byte, memaddr + head + cmdStart + 2); |
1da177e4 | 1856 | /* Below byte2 is bits to reset */ |
f2cf8e25 AC |
1857 | writeb(byte2, memaddr + head + cmdStart + 3); |
1858 | } else { | |
1859 | writeb(cmd, memaddr + head + cmdStart + 0); | |
1860 | writeb(ch->channelnum, memaddr + head + cmdStart + 1); | |
1861 | writeb(word_or_byte, memaddr + head + cmdStart + 2); | |
1da177e4 | 1862 | } |
1da177e4 | 1863 | head = (head + 4) & (cmdMax - cmdStart - 4); |
f2cf8e25 | 1864 | writew(head, &ch->mailbox->cin); |
1da177e4 LT |
1865 | count = FEPTIMEOUT; |
1866 | ||
f2cf8e25 | 1867 | for (;;) { /* Begin forever loop */ |
1da177e4 | 1868 | count--; |
f2cf8e25 | 1869 | if (count == 0) { |
1da177e4 LT |
1870 | printk(KERN_ERR "<Error> - Fep not responding in fepcmd()\n"); |
1871 | return; | |
1872 | } | |
f2cf8e25 AC |
1873 | head = readw(&ch->mailbox->cin); |
1874 | cmdTail = readw(&ch->mailbox->cout); | |
1da177e4 | 1875 | n = (head - cmdTail) & (cmdMax - cmdStart - 4); |
1da177e4 LT |
1876 | /* ---------------------------------------------------------- |
1877 | Basically this will break when the FEP acknowledges the | |
1878 | command by incrementing cmdTail (Making it equal to head). | |
1879 | ------------------------------------------------------------- */ | |
1da177e4 LT |
1880 | if (n <= ncmds * (sizeof(short) * 4)) |
1881 | break; /* Well nearly forever :-) */ | |
1da177e4 | 1882 | } /* End forever loop */ |
1da177e4 LT |
1883 | } /* End fepcmd */ |
1884 | ||
1885 | /* --------------------------------------------------------------------- | |
1886 | Digi products use fields in their channels structures that are very | |
1887 | similar to the c_cflag and c_iflag fields typically found in UNIX | |
1888 | termios structures. The below three routines allow mappings | |
1889 | between these hardware "flags" and their respective Linux flags. | |
1890 | ------------------------------------------------------------------------- */ | |
1891 | ||
1892 | /* --------------------- Begin termios2digi_h -------------------- */ | |
1893 | ||
1894 | static unsigned termios2digi_h(struct channel *ch, unsigned cflag) | |
1895 | { /* Begin termios2digi_h */ | |
1da177e4 LT |
1896 | unsigned res = 0; |
1897 | ||
f2cf8e25 | 1898 | if (cflag & CRTSCTS) { |
1da177e4 LT |
1899 | ch->digiext.digi_flags |= (RTSPACE | CTSPACE); |
1900 | res |= ((ch->m_cts) | (ch->m_rts)); | |
1901 | } | |
1902 | ||
1903 | if (ch->digiext.digi_flags & RTSPACE) | |
1904 | res |= ch->m_rts; | |
1905 | ||
1906 | if (ch->digiext.digi_flags & DTRPACE) | |
1907 | res |= ch->m_dtr; | |
1908 | ||
1909 | if (ch->digiext.digi_flags & CTSPACE) | |
1910 | res |= ch->m_cts; | |
1911 | ||
1912 | if (ch->digiext.digi_flags & DSRPACE) | |
1913 | res |= ch->dsr; | |
1914 | ||
1915 | if (ch->digiext.digi_flags & DCDPACE) | |
1916 | res |= ch->dcd; | |
1917 | ||
1918 | if (res & (ch->m_rts)) | |
1919 | ch->digiext.digi_flags |= RTSPACE; | |
1920 | ||
1921 | if (res & (ch->m_cts)) | |
1922 | ch->digiext.digi_flags |= CTSPACE; | |
1923 | ||
1924 | return res; | |
1925 | ||
1926 | } /* End termios2digi_h */ | |
1927 | ||
1928 | /* --------------------- Begin termios2digi_i -------------------- */ | |
1929 | static unsigned termios2digi_i(struct channel *ch, unsigned iflag) | |
1930 | { /* Begin termios2digi_i */ | |
1931 | ||
1932 | unsigned res = iflag & (IGNBRK | BRKINT | IGNPAR | PARMRK | | |
1933 | INPCK | ISTRIP|IXON|IXANY|IXOFF); | |
1da177e4 LT |
1934 | if (ch->digiext.digi_flags & DIGI_AIXON) |
1935 | res |= IAIXON; | |
1936 | return res; | |
1937 | ||
1938 | } /* End termios2digi_i */ | |
1939 | ||
1940 | /* --------------------- Begin termios2digi_c -------------------- */ | |
1941 | ||
1942 | static unsigned termios2digi_c(struct channel *ch, unsigned cflag) | |
1943 | { /* Begin termios2digi_c */ | |
1944 | ||
1945 | unsigned res = 0; | |
f2cf8e25 | 1946 | if (cflag & CBAUDEX) { /* Begin detected CBAUDEX */ |
1da177e4 | 1947 | ch->digiext.digi_flags |= DIGI_FAST; |
1da177e4 LT |
1948 | /* ------------------------------------------------------------- |
1949 | HUPCL bit is used by FEP to indicate fast baud | |
1950 | table is to be used. | |
1951 | ----------------------------------------------------------------- */ | |
1da177e4 | 1952 | res |= FEP_HUPCL; |
1da177e4 LT |
1953 | } /* End detected CBAUDEX */ |
1954 | else ch->digiext.digi_flags &= ~DIGI_FAST; | |
1da177e4 LT |
1955 | /* ------------------------------------------------------------------- |
1956 | CBAUD has bit position 0x1000 set these days to indicate Linux | |
1957 | baud rate remap. Digi hardware can't handle the bit assignment. | |
1958 | (We use a different bit assignment for high speed.). Clear this | |
1959 | bit out. | |
1960 | ---------------------------------------------------------------------- */ | |
1961 | res |= cflag & ((CBAUD ^ CBAUDEX) | PARODD | PARENB | CSTOPB | CSIZE); | |
1da177e4 LT |
1962 | /* ------------------------------------------------------------- |
1963 | This gets a little confusing. The Digi cards have their own | |
1964 | representation of c_cflags controling baud rate. For the most | |
1965 | part this is identical to the Linux implementation. However; | |
1966 | Digi supports one rate (76800) that Linux doesn't. This means | |
1967 | that the c_cflag entry that would normally mean 76800 for Digi | |
1968 | actually means 115200 under Linux. Without the below mapping, | |
1969 | a stty 115200 would only drive the board at 76800. Since | |
1970 | the rate 230400 is also found after 76800, the same problem afflicts | |
1971 | us when we choose a rate of 230400. Without the below modificiation | |
1972 | stty 230400 would actually give us 115200. | |
1973 | ||
1974 | There are two additional differences. The Linux value for CLOCAL | |
1975 | (0x800; 0004000) has no meaning to the Digi hardware. Also in | |
1976 | later releases of Linux; the CBAUD define has CBAUDEX (0x1000; | |
1977 | 0010000) ored into it (CBAUD = 0x100f as opposed to 0xf). CBAUDEX | |
1978 | should be checked for a screened out prior to termios2digi_c | |
1979 | returning. Since CLOCAL isn't used by the board this can be | |
1980 | ignored as long as the returned value is used only by Digi hardware. | |
f2cf8e25 AC |
1981 | ----------------------------------------------------------------- */ |
1982 | if (cflag & CBAUDEX) { | |
1da177e4 LT |
1983 | /* ------------------------------------------------------------- |
1984 | The below code is trying to guarantee that only baud rates | |
1985 | 115200 and 230400 are remapped. We use exclusive or because | |
1986 | the various baud rates share common bit positions and therefore | |
1987 | can't be tested for easily. | |
1988 | ----------------------------------------------------------------- */ | |
1989 | ||
1990 | ||
1991 | if ((!((cflag & 0x7) ^ (B115200 & ~CBAUDEX))) || | |
1992 | (!((cflag & 0x7) ^ (B230400 & ~CBAUDEX)))) | |
1da177e4 | 1993 | res += 1; |
1da177e4 | 1994 | } |
1da177e4 LT |
1995 | return res; |
1996 | ||
1997 | } /* End termios2digi_c */ | |
1998 | ||
1999 | /* --------------------- Begin epcaparam ----------------------- */ | |
2000 | ||
f2cf8e25 | 2001 | /* Caller must hold the locks */ |
1da177e4 LT |
2002 | static void epcaparam(struct tty_struct *tty, struct channel *ch) |
2003 | { /* Begin epcaparam */ | |
2004 | ||
2005 | unsigned int cmdHead; | |
606d099c | 2006 | struct ktermios *ts; |
bc9a5154 | 2007 | struct board_chan __iomem *bc; |
1da177e4 LT |
2008 | unsigned mval, hflow, cflag, iflag; |
2009 | ||
2010 | bc = ch->brdchan; | |
2011 | epcaassert(bc !=0, "bc out of range"); | |
2012 | ||
2013 | assertgwinon(ch); | |
1da177e4 | 2014 | ts = tty->termios; |
f2cf8e25 AC |
2015 | if ((ts->c_cflag & CBAUD) == 0) { /* Begin CBAUD detected */ |
2016 | cmdHead = readw(&bc->rin); | |
bc9a5154 | 2017 | writew(cmdHead, &bc->rout); |
f2cf8e25 | 2018 | cmdHead = readw(&bc->tin); |
1da177e4 LT |
2019 | /* Changing baud in mid-stream transmission can be wonderful */ |
2020 | /* --------------------------------------------------------------- | |
2021 | Flush current transmit buffer by setting cmdTail pointer (tout) | |
2022 | to cmdHead pointer (tin). Hopefully the transmit buffer is empty. | |
2023 | ----------------------------------------------------------------- */ | |
1da177e4 LT |
2024 | fepcmd(ch, STOUT, (unsigned) cmdHead, 0, 0, 0); |
2025 | mval = 0; | |
f2cf8e25 | 2026 | } else { /* Begin CBAUD not detected */ |
1da177e4 LT |
2027 | /* ------------------------------------------------------------------- |
2028 | c_cflags have changed but that change had nothing to do with BAUD. | |
2029 | Propagate the change to the card. | |
2030 | ---------------------------------------------------------------------- */ | |
1da177e4 | 2031 | cflag = termios2digi_c(ch, ts->c_cflag); |
f2cf8e25 | 2032 | if (cflag != ch->fepcflag) { |
1da177e4 LT |
2033 | ch->fepcflag = cflag; |
2034 | /* Set baud rate, char size, stop bits, parity */ | |
2035 | fepcmd(ch, SETCTRLFLAGS, (unsigned) cflag, 0, 0, 0); | |
2036 | } | |
1da177e4 LT |
2037 | /* ---------------------------------------------------------------- |
2038 | If the user has not forced CLOCAL and if the device is not a | |
2039 | CALLOUT device (Which is always CLOCAL) we set flags such that | |
2040 | the driver will wait on carrier detect. | |
2041 | ------------------------------------------------------------------- */ | |
1da177e4 | 2042 | if (ts->c_cflag & CLOCAL) |
1da177e4 | 2043 | ch->asyncflags &= ~ASYNC_CHECK_CD; |
1da177e4 | 2044 | else |
1da177e4 | 2045 | ch->asyncflags |= ASYNC_CHECK_CD; |
1da177e4 | 2046 | mval = ch->m_dtr | ch->m_rts; |
1da177e4 | 2047 | } /* End CBAUD not detected */ |
1da177e4 | 2048 | iflag = termios2digi_i(ch, ts->c_iflag); |
1da177e4 | 2049 | /* Check input mode flags */ |
f2cf8e25 | 2050 | if (iflag != ch->fepiflag) { |
1da177e4 | 2051 | ch->fepiflag = iflag; |
1da177e4 LT |
2052 | /* --------------------------------------------------------------- |
2053 | Command sets channels iflag structure on the board. Such things | |
2054 | as input soft flow control, handling of parity errors, and | |
2055 | break handling are all set here. | |
2056 | ------------------------------------------------------------------- */ | |
1da177e4 LT |
2057 | /* break handling, parity handling, input stripping, flow control chars */ |
2058 | fepcmd(ch, SETIFLAGS, (unsigned int) ch->fepiflag, 0, 0, 0); | |
2059 | } | |
1da177e4 LT |
2060 | /* --------------------------------------------------------------- |
2061 | Set the board mint value for this channel. This will cause hardware | |
2062 | events to be generated each time the DCD signal (Described in mint) | |
2063 | changes. | |
2064 | ------------------------------------------------------------------- */ | |
f2cf8e25 | 2065 | writeb(ch->dcd, &bc->mint); |
1da177e4 LT |
2066 | if ((ts->c_cflag & CLOCAL) || (ch->digiext.digi_flags & DIGI_FORCEDCD)) |
2067 | if (ch->digiext.digi_flags & DIGI_FORCEDCD) | |
f2cf8e25 AC |
2068 | writeb(0, &bc->mint); |
2069 | ch->imodem = readb(&bc->mstat); | |
1da177e4 | 2070 | hflow = termios2digi_h(ch, ts->c_cflag); |
f2cf8e25 | 2071 | if (hflow != ch->hflow) { |
1da177e4 | 2072 | ch->hflow = hflow; |
1da177e4 LT |
2073 | /* -------------------------------------------------------------- |
2074 | Hard flow control has been selected but the board is not | |
2075 | using it. Activate hard flow control now. | |
2076 | ----------------------------------------------------------------- */ | |
1da177e4 LT |
2077 | fepcmd(ch, SETHFLOW, hflow, 0xff, 0, 1); |
2078 | } | |
1da177e4 LT |
2079 | mval ^= ch->modemfake & (mval ^ ch->modem); |
2080 | ||
f2cf8e25 | 2081 | if (ch->omodem ^ mval) { |
1da177e4 | 2082 | ch->omodem = mval; |
1da177e4 LT |
2083 | /* -------------------------------------------------------------- |
2084 | The below command sets the DTR and RTS mstat structure. If | |
2085 | hard flow control is NOT active these changes will drive the | |
2086 | output of the actual DTR and RTS lines. If hard flow control | |
2087 | is active, the changes will be saved in the mstat structure and | |
2088 | only asserted when hard flow control is turned off. | |
2089 | ----------------------------------------------------------------- */ | |
2090 | ||
2091 | /* First reset DTR & RTS; then set them */ | |
2092 | fepcmd(ch, SETMODEM, 0, ((ch->m_dtr)|(ch->m_rts)), 0, 1); | |
2093 | fepcmd(ch, SETMODEM, mval, 0, 0, 1); | |
1da177e4 | 2094 | } |
f2cf8e25 | 2095 | if (ch->startc != ch->fepstartc || ch->stopc != ch->fepstopc) { |
1da177e4 LT |
2096 | ch->fepstartc = ch->startc; |
2097 | ch->fepstopc = ch->stopc; | |
1da177e4 LT |
2098 | /* ------------------------------------------------------------ |
2099 | The XON / XOFF characters have changed; propagate these | |
2100 | changes to the card. | |
2101 | --------------------------------------------------------------- */ | |
1da177e4 LT |
2102 | fepcmd(ch, SONOFFC, ch->fepstartc, ch->fepstopc, 0, 1); |
2103 | } | |
f2cf8e25 | 2104 | if (ch->startca != ch->fepstartca || ch->stopca != ch->fepstopca) { |
1da177e4 LT |
2105 | ch->fepstartca = ch->startca; |
2106 | ch->fepstopca = ch->stopca; | |
1da177e4 LT |
2107 | /* --------------------------------------------------------------- |
2108 | Similar to the above, this time the auxilarly XON / XOFF | |
2109 | characters have changed; propagate these changes to the card. | |
2110 | ------------------------------------------------------------------ */ | |
1da177e4 LT |
2111 | fepcmd(ch, SAUXONOFFC, ch->fepstartca, ch->fepstopca, 0, 1); |
2112 | } | |
1da177e4 LT |
2113 | } /* End epcaparam */ |
2114 | ||
2115 | /* --------------------- Begin receive_data ----------------------- */ | |
f2cf8e25 | 2116 | /* Caller holds lock */ |
1da177e4 LT |
2117 | static void receive_data(struct channel *ch) |
2118 | { /* Begin receive_data */ | |
2119 | ||
2120 | unchar *rptr; | |
606d099c | 2121 | struct ktermios *ts = NULL; |
1da177e4 | 2122 | struct tty_struct *tty; |
bc9a5154 | 2123 | struct board_chan __iomem *bc; |
f2cf8e25 AC |
2124 | int dataToRead, wrapgap, bytesAvailable; |
2125 | unsigned int tail, head; | |
1da177e4 | 2126 | unsigned int wrapmask; |
1da177e4 | 2127 | |
1da177e4 LT |
2128 | /* --------------------------------------------------------------- |
2129 | This routine is called by doint when a receive data event | |
2130 | has taken place. | |
2131 | ------------------------------------------------------------------- */ | |
2132 | ||
2133 | globalwinon(ch); | |
1da177e4 LT |
2134 | if (ch->statusflags & RXSTOPPED) |
2135 | return; | |
1da177e4 LT |
2136 | tty = ch->tty; |
2137 | if (tty) | |
2138 | ts = tty->termios; | |
1da177e4 | 2139 | bc = ch->brdchan; |
f2cf8e25 | 2140 | BUG_ON(!bc); |
1da177e4 LT |
2141 | wrapmask = ch->rxbufsize - 1; |
2142 | ||
2143 | /* --------------------------------------------------------------------- | |
2144 | Get the head and tail pointers to the receiver queue. Wrap the | |
2145 | head pointer if it has reached the end of the buffer. | |
2146 | ------------------------------------------------------------------------ */ | |
f2cf8e25 | 2147 | head = readw(&bc->rin); |
1da177e4 | 2148 | head &= wrapmask; |
f2cf8e25 | 2149 | tail = readw(&bc->rout) & wrapmask; |
1da177e4 LT |
2150 | |
2151 | bytesAvailable = (head - tail) & wrapmask; | |
1da177e4 LT |
2152 | if (bytesAvailable == 0) |
2153 | return; | |
2154 | ||
2155 | /* ------------------------------------------------------------------ | |
2156 | If CREAD bit is off or device not open, set TX tail to head | |
2157 | --------------------------------------------------------------------- */ | |
2158 | ||
f2cf8e25 | 2159 | if (!tty || !ts || !(ts->c_cflag & CREAD)) { |
bc9a5154 | 2160 | writew(head, &bc->rout); |
1da177e4 LT |
2161 | return; |
2162 | } | |
2163 | ||
33f0f88f | 2164 | if (tty_buffer_request_room(tty, bytesAvailable + 1) == 0) |
1da177e4 LT |
2165 | return; |
2166 | ||
f2cf8e25 AC |
2167 | if (readb(&bc->orun)) { |
2168 | writeb(0, &bc->orun); | |
2169 | printk(KERN_WARNING "epca; overrun! DigiBoard device %s\n",tty->name); | |
33f0f88f | 2170 | tty_insert_flip_char(tty, 0, TTY_OVERRUN); |
1da177e4 | 2171 | } |
1da177e4 | 2172 | rxwinon(ch); |
f2cf8e25 | 2173 | while (bytesAvailable > 0) { /* Begin while there is data on the card */ |
1da177e4 | 2174 | wrapgap = (head >= tail) ? head - tail : ch->rxbufsize - tail; |
1da177e4 LT |
2175 | /* --------------------------------------------------------------- |
2176 | Even if head has wrapped around only report the amount of | |
2177 | data to be equal to the size - tail. Remember memcpy can't | |
2178 | automaticly wrap around the receive buffer. | |
2179 | ----------------------------------------------------------------- */ | |
1da177e4 | 2180 | dataToRead = (wrapgap < bytesAvailable) ? wrapgap : bytesAvailable; |
1da177e4 LT |
2181 | /* -------------------------------------------------------------- |
2182 | Make sure we don't overflow the buffer | |
2183 | ----------------------------------------------------------------- */ | |
33f0f88f | 2184 | dataToRead = tty_prepare_flip_string(tty, &rptr, dataToRead); |
1da177e4 LT |
2185 | if (dataToRead == 0) |
2186 | break; | |
1da177e4 LT |
2187 | /* --------------------------------------------------------------- |
2188 | Move data read from our card into the line disciplines buffer | |
2189 | for translation if necessary. | |
2190 | ------------------------------------------------------------------ */ | |
f2cf8e25 | 2191 | memcpy_fromio(rptr, ch->rxptr + tail, dataToRead); |
1da177e4 LT |
2192 | tail = (tail + dataToRead) & wrapmask; |
2193 | bytesAvailable -= dataToRead; | |
1da177e4 | 2194 | } /* End while there is data on the card */ |
1da177e4 | 2195 | globalwinon(ch); |
f2cf8e25 | 2196 | writew(tail, &bc->rout); |
1da177e4 LT |
2197 | /* Must be called with global data */ |
2198 | tty_schedule_flip(ch->tty); | |
2199 | return; | |
1da177e4 LT |
2200 | } /* End receive_data */ |
2201 | ||
2202 | static int info_ioctl(struct tty_struct *tty, struct file * file, | |
2203 | unsigned int cmd, unsigned long arg) | |
2204 | { | |
2205 | switch (cmd) | |
2206 | { /* Begin switch cmd */ | |
1da177e4 LT |
2207 | case DIGI_GETINFO: |
2208 | { /* Begin case DIGI_GETINFO */ | |
1da177e4 LT |
2209 | struct digi_info di ; |
2210 | int brd; | |
2211 | ||
f2cf8e25 AC |
2212 | if(get_user(brd, (unsigned int __user *)arg)) |
2213 | return -EFAULT; | |
2214 | if (brd < 0 || brd >= num_cards || num_cards == 0) | |
2215 | return -ENODEV; | |
1da177e4 LT |
2216 | |
2217 | memset(&di, 0, sizeof(di)); | |
2218 | ||
2219 | di.board = brd ; | |
2220 | di.status = boards[brd].status; | |
2221 | di.type = boards[brd].type ; | |
2222 | di.numports = boards[brd].numports ; | |
f2cf8e25 AC |
2223 | /* Legacy fixups - just move along nothing to see */ |
2224 | di.port = (unsigned char *)boards[brd].port ; | |
2225 | di.membase = (unsigned char *)boards[brd].membase ; | |
1da177e4 LT |
2226 | |
2227 | if (copy_to_user((void __user *)arg, &di, sizeof (di))) | |
2228 | return -EFAULT; | |
2229 | break; | |
2230 | ||
2231 | } /* End case DIGI_GETINFO */ | |
2232 | ||
2233 | case DIGI_POLLER: | |
2234 | { /* Begin case DIGI_POLLER */ | |
2235 | ||
2236 | int brd = arg & 0xff000000 >> 16 ; | |
2237 | unsigned char state = arg & 0xff ; | |
2238 | ||
f2cf8e25 AC |
2239 | if (brd < 0 || brd >= num_cards) { |
2240 | printk(KERN_ERR "epca: DIGI POLLER : brd not valid!\n"); | |
1da177e4 LT |
2241 | return (-ENODEV); |
2242 | } | |
1da177e4 LT |
2243 | digi_poller_inhibited = state ; |
2244 | break ; | |
1da177e4 LT |
2245 | } /* End case DIGI_POLLER */ |
2246 | ||
2247 | case DIGI_INIT: | |
2248 | { /* Begin case DIGI_INIT */ | |
1da177e4 LT |
2249 | /* ------------------------------------------------------------ |
2250 | This call is made by the apps to complete the initilization | |
2251 | of the board(s). This routine is responsible for setting | |
2252 | the card to its initial state and setting the drivers control | |
2253 | fields to the sutianle settings for the card in question. | |
2254 | ---------------------------------------------------------------- */ | |
1da177e4 LT |
2255 | int crd ; |
2256 | for (crd = 0; crd < num_cards; crd++) | |
2257 | post_fep_init (crd); | |
1da177e4 | 2258 | break ; |
1da177e4 | 2259 | } /* End case DIGI_INIT */ |
1da177e4 | 2260 | default: |
f2cf8e25 | 2261 | return -ENOTTY; |
1da177e4 LT |
2262 | } /* End switch cmd */ |
2263 | return (0) ; | |
2264 | } | |
2265 | /* --------------------- Begin pc_ioctl ----------------------- */ | |
2266 | ||
2267 | static int pc_tiocmget(struct tty_struct *tty, struct file *file) | |
2268 | { | |
2269 | struct channel *ch = (struct channel *) tty->driver_data; | |
bc9a5154 | 2270 | struct board_chan __iomem *bc; |
1da177e4 LT |
2271 | unsigned int mstat, mflag = 0; |
2272 | unsigned long flags; | |
2273 | ||
2274 | if (ch) | |
2275 | bc = ch->brdchan; | |
2276 | else | |
f2cf8e25 | 2277 | return -EINVAL; |
1da177e4 | 2278 | |
f2cf8e25 | 2279 | spin_lock_irqsave(&epca_lock, flags); |
1da177e4 | 2280 | globalwinon(ch); |
f2cf8e25 | 2281 | mstat = readb(&bc->mstat); |
1da177e4 | 2282 | memoff(ch); |
f2cf8e25 | 2283 | spin_unlock_irqrestore(&epca_lock, flags); |
1da177e4 LT |
2284 | |
2285 | if (mstat & ch->m_dtr) | |
2286 | mflag |= TIOCM_DTR; | |
1da177e4 LT |
2287 | if (mstat & ch->m_rts) |
2288 | mflag |= TIOCM_RTS; | |
1da177e4 LT |
2289 | if (mstat & ch->m_cts) |
2290 | mflag |= TIOCM_CTS; | |
1da177e4 LT |
2291 | if (mstat & ch->dsr) |
2292 | mflag |= TIOCM_DSR; | |
1da177e4 LT |
2293 | if (mstat & ch->m_ri) |
2294 | mflag |= TIOCM_RI; | |
1da177e4 LT |
2295 | if (mstat & ch->dcd) |
2296 | mflag |= TIOCM_CD; | |
1da177e4 LT |
2297 | return mflag; |
2298 | } | |
2299 | ||
2300 | static int pc_tiocmset(struct tty_struct *tty, struct file *file, | |
2301 | unsigned int set, unsigned int clear) | |
2302 | { | |
2303 | struct channel *ch = (struct channel *) tty->driver_data; | |
2304 | unsigned long flags; | |
2305 | ||
f2cf8e25 AC |
2306 | if (!ch) |
2307 | return -EINVAL; | |
1da177e4 | 2308 | |
f2cf8e25 | 2309 | spin_lock_irqsave(&epca_lock, flags); |
1da177e4 LT |
2310 | /* |
2311 | * I think this modemfake stuff is broken. It doesn't | |
2312 | * correctly reflect the behaviour desired by the TIOCM* | |
2313 | * ioctls. Therefore this is probably broken. | |
2314 | */ | |
2315 | if (set & TIOCM_RTS) { | |
2316 | ch->modemfake |= ch->m_rts; | |
2317 | ch->modem |= ch->m_rts; | |
2318 | } | |
2319 | if (set & TIOCM_DTR) { | |
2320 | ch->modemfake |= ch->m_dtr; | |
2321 | ch->modem |= ch->m_dtr; | |
2322 | } | |
2323 | if (clear & TIOCM_RTS) { | |
2324 | ch->modemfake |= ch->m_rts; | |
2325 | ch->modem &= ~ch->m_rts; | |
2326 | } | |
2327 | if (clear & TIOCM_DTR) { | |
2328 | ch->modemfake |= ch->m_dtr; | |
2329 | ch->modem &= ~ch->m_dtr; | |
2330 | } | |
1da177e4 | 2331 | globalwinon(ch); |
1da177e4 LT |
2332 | /* -------------------------------------------------------------- |
2333 | The below routine generally sets up parity, baud, flow control | |
2334 | issues, etc.... It effect both control flags and input flags. | |
2335 | ------------------------------------------------------------------ */ | |
1da177e4 LT |
2336 | epcaparam(tty,ch); |
2337 | memoff(ch); | |
f2cf8e25 | 2338 | spin_unlock_irqrestore(&epca_lock, flags); |
1da177e4 LT |
2339 | return 0; |
2340 | } | |
2341 | ||
2342 | static int pc_ioctl(struct tty_struct *tty, struct file * file, | |
2343 | unsigned int cmd, unsigned long arg) | |
2344 | { /* Begin pc_ioctl */ | |
2345 | ||
2346 | digiflow_t dflow; | |
2347 | int retval; | |
2348 | unsigned long flags; | |
2349 | unsigned int mflag, mstat; | |
2350 | unsigned char startc, stopc; | |
bc9a5154 | 2351 | struct board_chan __iomem *bc; |
1da177e4 LT |
2352 | struct channel *ch = (struct channel *) tty->driver_data; |
2353 | void __user *argp = (void __user *)arg; | |
2354 | ||
2355 | if (ch) | |
2356 | bc = ch->brdchan; | |
2357 | else | |
f2cf8e25 | 2358 | return -EINVAL; |
1da177e4 LT |
2359 | |
2360 | /* ------------------------------------------------------------------- | |
2361 | For POSIX compliance we need to add more ioctls. See tty_ioctl.c | |
2362 | in /usr/src/linux/drivers/char for a good example. In particular | |
2363 | think about adding TCSETAF, TCSETAW, TCSETA, TCSETSF, TCSETSW, TCSETS. | |
2364 | ---------------------------------------------------------------------- */ | |
2365 | ||
2366 | switch (cmd) | |
2367 | { /* Begin switch cmd */ | |
2368 | ||
606d099c | 2369 | #if 0 /* Handled by calling layer properly */ |
1da177e4 | 2370 | case TCGETS: |
606d099c | 2371 | if (copy_to_user(argp, tty->termios, sizeof(struct ktermios))) |
1da177e4 | 2372 | return -EFAULT; |
f2cf8e25 | 2373 | return 0; |
1da177e4 LT |
2374 | case TCGETA: |
2375 | return get_termio(tty, argp); | |
606d099c | 2376 | #endif |
1da177e4 | 2377 | case TCSBRK: /* SVID version: non-zero arg --> no break */ |
1da177e4 LT |
2378 | retval = tty_check_change(tty); |
2379 | if (retval) | |
2380 | return retval; | |
1da177e4 | 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 | if (!arg) | |
2387 | digi_send_break(ch, HZ/4); /* 1/4 second */ | |
2388 | return 0; | |
1da177e4 | 2389 | case TCSBRKP: /* support for POSIX tcsendbreak() */ |
1da177e4 LT |
2390 | retval = tty_check_change(tty); |
2391 | if (retval) | |
2392 | return retval; | |
2393 | ||
2394 | /* Setup an event to indicate when the transmit buffer empties */ | |
f2cf8e25 | 2395 | spin_lock_irqsave(&epca_lock, flags); |
1da177e4 | 2396 | setup_empty_event(tty,ch); |
f2cf8e25 | 2397 | spin_unlock_irqrestore(&epca_lock, flags); |
1da177e4 LT |
2398 | tty_wait_until_sent(tty, 0); |
2399 | digi_send_break(ch, arg ? arg*(HZ/10) : HZ/4); | |
2400 | return 0; | |
1da177e4 LT |
2401 | case TIOCGSOFTCAR: |
2402 | if (put_user(C_CLOCAL(tty)?1:0, (unsigned long __user *)arg)) | |
2403 | return -EFAULT; | |
2404 | return 0; | |
1da177e4 LT |
2405 | case TIOCSSOFTCAR: |
2406 | { | |
2407 | unsigned int value; | |
2408 | ||
2409 | if (get_user(value, (unsigned __user *)argp)) | |
2410 | return -EFAULT; | |
2411 | tty->termios->c_cflag = | |
2412 | ((tty->termios->c_cflag & ~CLOCAL) | | |
2413 | (value ? CLOCAL : 0)); | |
2414 | return 0; | |
2415 | } | |
1da177e4 LT |
2416 | case TIOCMODG: |
2417 | mflag = pc_tiocmget(tty, file); | |
2418 | if (put_user(mflag, (unsigned long __user *)argp)) | |
2419 | return -EFAULT; | |
2420 | break; | |
1da177e4 LT |
2421 | case TIOCMODS: |
2422 | if (get_user(mstat, (unsigned __user *)argp)) | |
2423 | return -EFAULT; | |
2424 | return pc_tiocmset(tty, file, mstat, ~mstat); | |
1da177e4 | 2425 | case TIOCSDTR: |
f2cf8e25 | 2426 | spin_lock_irqsave(&epca_lock, flags); |
1da177e4 | 2427 | ch->omodem |= ch->m_dtr; |
1da177e4 LT |
2428 | globalwinon(ch); |
2429 | fepcmd(ch, SETMODEM, ch->m_dtr, 0, 10, 1); | |
2430 | memoff(ch); | |
f2cf8e25 | 2431 | spin_unlock_irqrestore(&epca_lock, flags); |
1da177e4 LT |
2432 | break; |
2433 | ||
2434 | case TIOCCDTR: | |
f2cf8e25 | 2435 | spin_lock_irqsave(&epca_lock, flags); |
1da177e4 | 2436 | ch->omodem &= ~ch->m_dtr; |
1da177e4 LT |
2437 | globalwinon(ch); |
2438 | fepcmd(ch, SETMODEM, 0, ch->m_dtr, 10, 1); | |
2439 | memoff(ch); | |
f2cf8e25 | 2440 | spin_unlock_irqrestore(&epca_lock, flags); |
1da177e4 | 2441 | break; |
1da177e4 LT |
2442 | case DIGI_GETA: |
2443 | if (copy_to_user(argp, &ch->digiext, sizeof(digi_t))) | |
2444 | return -EFAULT; | |
2445 | break; | |
1da177e4 LT |
2446 | case DIGI_SETAW: |
2447 | case DIGI_SETAF: | |
f2cf8e25 | 2448 | if (cmd == DIGI_SETAW) { |
1da177e4 | 2449 | /* Setup an event to indicate when the transmit buffer empties */ |
f2cf8e25 | 2450 | spin_lock_irqsave(&epca_lock, flags); |
1da177e4 | 2451 | setup_empty_event(tty,ch); |
f2cf8e25 | 2452 | spin_unlock_irqrestore(&epca_lock, flags); |
1da177e4 | 2453 | tty_wait_until_sent(tty, 0); |
f2cf8e25 | 2454 | } else { |
1da177e4 LT |
2455 | /* ldisc lock already held in ioctl */ |
2456 | if (tty->ldisc.flush_buffer) | |
2457 | tty->ldisc.flush_buffer(tty); | |
2458 | } | |
1da177e4 | 2459 | /* Fall Thru */ |
1da177e4 LT |
2460 | case DIGI_SETA: |
2461 | if (copy_from_user(&ch->digiext, argp, sizeof(digi_t))) | |
2462 | return -EFAULT; | |
2463 | ||
f2cf8e25 | 2464 | if (ch->digiext.digi_flags & DIGI_ALTPIN) { |
1da177e4 LT |
2465 | ch->dcd = ch->m_dsr; |
2466 | ch->dsr = ch->m_dcd; | |
f2cf8e25 | 2467 | } else { |
1da177e4 LT |
2468 | ch->dcd = ch->m_dcd; |
2469 | ch->dsr = ch->m_dsr; | |
2470 | } | |
2471 | ||
f2cf8e25 | 2472 | spin_lock_irqsave(&epca_lock, flags); |
1da177e4 LT |
2473 | globalwinon(ch); |
2474 | ||
2475 | /* ----------------------------------------------------------------- | |
2476 | The below routine generally sets up parity, baud, flow control | |
2477 | issues, etc.... It effect both control flags and input flags. | |
2478 | ------------------------------------------------------------------- */ | |
2479 | ||
2480 | epcaparam(tty,ch); | |
2481 | memoff(ch); | |
f2cf8e25 | 2482 | spin_unlock_irqrestore(&epca_lock, flags); |
1da177e4 LT |
2483 | break; |
2484 | ||
2485 | case DIGI_GETFLOW: | |
2486 | case DIGI_GETAFLOW: | |
f2cf8e25 | 2487 | spin_lock_irqsave(&epca_lock, flags); |
1da177e4 | 2488 | globalwinon(ch); |
f2cf8e25 AC |
2489 | if (cmd == DIGI_GETFLOW) { |
2490 | dflow.startc = readb(&bc->startc); | |
2491 | dflow.stopc = readb(&bc->stopc); | |
2492 | } else { | |
2493 | dflow.startc = readb(&bc->startca); | |
2494 | dflow.stopc = readb(&bc->stopca); | |
1da177e4 LT |
2495 | } |
2496 | memoff(ch); | |
f2cf8e25 | 2497 | spin_unlock_irqrestore(&epca_lock, flags); |
1da177e4 LT |
2498 | |
2499 | if (copy_to_user(argp, &dflow, sizeof(dflow))) | |
2500 | return -EFAULT; | |
2501 | break; | |
2502 | ||
2503 | case DIGI_SETAFLOW: | |
2504 | case DIGI_SETFLOW: | |
f2cf8e25 | 2505 | if (cmd == DIGI_SETFLOW) { |
1da177e4 LT |
2506 | startc = ch->startc; |
2507 | stopc = ch->stopc; | |
f2cf8e25 | 2508 | } else { |
1da177e4 LT |
2509 | startc = ch->startca; |
2510 | stopc = ch->stopca; | |
2511 | } | |
2512 | ||
2513 | if (copy_from_user(&dflow, argp, sizeof(dflow))) | |
2514 | return -EFAULT; | |
2515 | ||
f2cf8e25 AC |
2516 | if (dflow.startc != startc || dflow.stopc != stopc) { /* Begin if setflow toggled */ |
2517 | spin_lock_irqsave(&epca_lock, flags); | |
1da177e4 LT |
2518 | globalwinon(ch); |
2519 | ||
f2cf8e25 | 2520 | if (cmd == DIGI_SETFLOW) { |
1da177e4 LT |
2521 | ch->fepstartc = ch->startc = dflow.startc; |
2522 | ch->fepstopc = ch->stopc = dflow.stopc; | |
2523 | fepcmd(ch, SONOFFC, ch->fepstartc, ch->fepstopc, 0, 1); | |
f2cf8e25 | 2524 | } else { |
1da177e4 LT |
2525 | ch->fepstartca = ch->startca = dflow.startc; |
2526 | ch->fepstopca = ch->stopca = dflow.stopc; | |
2527 | fepcmd(ch, SAUXONOFFC, ch->fepstartca, ch->fepstopca, 0, 1); | |
2528 | } | |
2529 | ||
f2cf8e25 | 2530 | if (ch->statusflags & TXSTOPPED) |
1da177e4 LT |
2531 | pc_start(tty); |
2532 | ||
2533 | memoff(ch); | |
f2cf8e25 | 2534 | spin_unlock_irqrestore(&epca_lock, flags); |
1da177e4 LT |
2535 | } /* End if setflow toggled */ |
2536 | break; | |
1da177e4 LT |
2537 | default: |
2538 | return -ENOIOCTLCMD; | |
1da177e4 | 2539 | } /* End switch cmd */ |
1da177e4 | 2540 | return 0; |
1da177e4 LT |
2541 | } /* End pc_ioctl */ |
2542 | ||
2543 | /* --------------------- Begin pc_set_termios ----------------------- */ | |
2544 | ||
606d099c | 2545 | static void pc_set_termios(struct tty_struct *tty, struct ktermios *old_termios) |
1da177e4 LT |
2546 | { /* Begin pc_set_termios */ |
2547 | ||
2548 | struct channel *ch; | |
2549 | unsigned long flags; | |
1da177e4 LT |
2550 | /* --------------------------------------------------------- |
2551 | verifyChannel returns the channel from the tty struct | |
2552 | if it is valid. This serves as a sanity check. | |
2553 | ------------------------------------------------------------- */ | |
f2cf8e25 AC |
2554 | if ((ch = verifyChannel(tty)) != NULL) { /* Begin if channel valid */ |
2555 | spin_lock_irqsave(&epca_lock, flags); | |
1da177e4 LT |
2556 | globalwinon(ch); |
2557 | epcaparam(tty, ch); | |
2558 | memoff(ch); | |
f2cf8e25 | 2559 | spin_unlock_irqrestore(&epca_lock, flags); |
1da177e4 LT |
2560 | |
2561 | if ((old_termios->c_cflag & CRTSCTS) && | |
2562 | ((tty->termios->c_cflag & CRTSCTS) == 0)) | |
2563 | tty->hw_stopped = 0; | |
2564 | ||
2565 | if (!(old_termios->c_cflag & CLOCAL) && | |
2566 | (tty->termios->c_cflag & CLOCAL)) | |
2567 | wake_up_interruptible(&ch->open_wait); | |
2568 | ||
1da177e4 LT |
2569 | } /* End if channel valid */ |
2570 | ||
2571 | } /* End pc_set_termios */ | |
2572 | ||
2573 | /* --------------------- Begin do_softint ----------------------- */ | |
2574 | ||
c4028958 | 2575 | static void do_softint(struct work_struct *work) |
1da177e4 | 2576 | { /* Begin do_softint */ |
c4028958 | 2577 | struct channel *ch = container_of(work, struct channel, tqueue); |
1da177e4 | 2578 | /* Called in response to a modem change event */ |
f2cf8e25 | 2579 | if (ch && ch->magic == EPCA_MAGIC) { /* Begin EPCA_MAGIC */ |
1da177e4 LT |
2580 | struct tty_struct *tty = ch->tty; |
2581 | ||
f2cf8e25 AC |
2582 | if (tty && tty->driver_data) { |
2583 | if (test_and_clear_bit(EPCA_EVENT_HANGUP, &ch->event)) { /* Begin if clear_bit */ | |
1da177e4 LT |
2584 | tty_hangup(tty); /* FIXME: module removal race here - AKPM */ |
2585 | wake_up_interruptible(&ch->open_wait); | |
2586 | ch->asyncflags &= ~ASYNC_NORMAL_ACTIVE; | |
1da177e4 LT |
2587 | } /* End if clear_bit */ |
2588 | } | |
1da177e4 LT |
2589 | } /* End EPCA_MAGIC */ |
2590 | } /* End do_softint */ | |
2591 | ||
2592 | /* ------------------------------------------------------------ | |
2593 | pc_stop and pc_start provide software flow control to the | |
2594 | routine and the pc_ioctl routine. | |
2595 | ---------------------------------------------------------------- */ | |
2596 | ||
2597 | /* --------------------- Begin pc_stop ----------------------- */ | |
2598 | ||
2599 | static void pc_stop(struct tty_struct *tty) | |
2600 | { /* Begin pc_stop */ | |
2601 | ||
2602 | struct channel *ch; | |
2603 | unsigned long flags; | |
1da177e4 LT |
2604 | /* --------------------------------------------------------- |
2605 | verifyChannel returns the channel from the tty struct | |
2606 | if it is valid. This serves as a sanity check. | |
2607 | ------------------------------------------------------------- */ | |
f2cf8e25 AC |
2608 | if ((ch = verifyChannel(tty)) != NULL) { /* Begin if valid channel */ |
2609 | spin_lock_irqsave(&epca_lock, flags); | |
2610 | if ((ch->statusflags & TXSTOPPED) == 0) { /* Begin if transmit stop requested */ | |
1da177e4 | 2611 | globalwinon(ch); |
1da177e4 | 2612 | /* STOP transmitting now !! */ |
1da177e4 | 2613 | fepcmd(ch, PAUSETX, 0, 0, 0, 0); |
1da177e4 LT |
2614 | ch->statusflags |= TXSTOPPED; |
2615 | memoff(ch); | |
1da177e4 | 2616 | } /* End if transmit stop requested */ |
f2cf8e25 | 2617 | spin_unlock_irqrestore(&epca_lock, flags); |
1da177e4 | 2618 | } /* End if valid channel */ |
1da177e4 LT |
2619 | } /* End pc_stop */ |
2620 | ||
2621 | /* --------------------- Begin pc_start ----------------------- */ | |
2622 | ||
2623 | static void pc_start(struct tty_struct *tty) | |
2624 | { /* Begin pc_start */ | |
1da177e4 | 2625 | struct channel *ch; |
1da177e4 LT |
2626 | /* --------------------------------------------------------- |
2627 | verifyChannel returns the channel from the tty struct | |
2628 | if it is valid. This serves as a sanity check. | |
2629 | ------------------------------------------------------------- */ | |
f2cf8e25 | 2630 | if ((ch = verifyChannel(tty)) != NULL) { /* Begin if channel valid */ |
1da177e4 | 2631 | unsigned long flags; |
f2cf8e25 | 2632 | spin_lock_irqsave(&epca_lock, flags); |
1da177e4 | 2633 | /* Just in case output was resumed because of a change in Digi-flow */ |
f2cf8e25 | 2634 | if (ch->statusflags & TXSTOPPED) { /* Begin transmit resume requested */ |
bc9a5154 | 2635 | struct board_chan __iomem *bc; |
1da177e4 LT |
2636 | globalwinon(ch); |
2637 | bc = ch->brdchan; | |
2638 | if (ch->statusflags & LOWWAIT) | |
f2cf8e25 | 2639 | writeb(1, &bc->ilow); |
1da177e4 | 2640 | /* Okay, you can start transmitting again... */ |
1da177e4 | 2641 | fepcmd(ch, RESUMETX, 0, 0, 0, 0); |
1da177e4 LT |
2642 | ch->statusflags &= ~TXSTOPPED; |
2643 | memoff(ch); | |
1da177e4 | 2644 | } /* End transmit resume requested */ |
f2cf8e25 | 2645 | spin_unlock_irqrestore(&epca_lock, flags); |
1da177e4 | 2646 | } /* End if channel valid */ |
1da177e4 LT |
2647 | } /* End pc_start */ |
2648 | ||
2649 | /* ------------------------------------------------------------------ | |
2650 | The below routines pc_throttle and pc_unthrottle are used | |
2651 | to slow (And resume) the receipt of data into the kernels | |
2652 | receive buffers. The exact occurrence of this depends on the | |
2653 | size of the kernels receive buffer and what the 'watermarks' | |
2654 | are set to for that buffer. See the n_ttys.c file for more | |
2655 | details. | |
2656 | ______________________________________________________________________ */ | |
2657 | /* --------------------- Begin throttle ----------------------- */ | |
2658 | ||
2659 | static void pc_throttle(struct tty_struct * tty) | |
2660 | { /* Begin pc_throttle */ | |
1da177e4 LT |
2661 | struct channel *ch; |
2662 | unsigned long flags; | |
1da177e4 LT |
2663 | /* --------------------------------------------------------- |
2664 | verifyChannel returns the channel from the tty struct | |
2665 | if it is valid. This serves as a sanity check. | |
2666 | ------------------------------------------------------------- */ | |
f2cf8e25 AC |
2667 | if ((ch = verifyChannel(tty)) != NULL) { /* Begin if channel valid */ |
2668 | spin_lock_irqsave(&epca_lock, flags); | |
2669 | if ((ch->statusflags & RXSTOPPED) == 0) { | |
1da177e4 LT |
2670 | globalwinon(ch); |
2671 | fepcmd(ch, PAUSERX, 0, 0, 0, 0); | |
1da177e4 LT |
2672 | ch->statusflags |= RXSTOPPED; |
2673 | memoff(ch); | |
2674 | } | |
f2cf8e25 | 2675 | spin_unlock_irqrestore(&epca_lock, flags); |
1da177e4 | 2676 | } /* End if channel valid */ |
1da177e4 LT |
2677 | } /* End pc_throttle */ |
2678 | ||
2679 | /* --------------------- Begin unthrottle ----------------------- */ | |
2680 | ||
2681 | static void pc_unthrottle(struct tty_struct *tty) | |
2682 | { /* Begin pc_unthrottle */ | |
1da177e4 LT |
2683 | struct channel *ch; |
2684 | unsigned long flags; | |
1da177e4 LT |
2685 | /* --------------------------------------------------------- |
2686 | verifyChannel returns the channel from the tty struct | |
2687 | if it is valid. This serves as a sanity check. | |
2688 | ------------------------------------------------------------- */ | |
f2cf8e25 | 2689 | if ((ch = verifyChannel(tty)) != NULL) { /* Begin if channel valid */ |
1da177e4 | 2690 | /* Just in case output was resumed because of a change in Digi-flow */ |
f2cf8e25 AC |
2691 | spin_lock_irqsave(&epca_lock, flags); |
2692 | if (ch->statusflags & RXSTOPPED) { | |
1da177e4 | 2693 | globalwinon(ch); |
1da177e4 | 2694 | fepcmd(ch, RESUMERX, 0, 0, 0, 0); |
1da177e4 LT |
2695 | ch->statusflags &= ~RXSTOPPED; |
2696 | memoff(ch); | |
2697 | } | |
f2cf8e25 | 2698 | spin_unlock_irqrestore(&epca_lock, flags); |
1da177e4 | 2699 | } /* End if channel valid */ |
1da177e4 LT |
2700 | } /* End pc_unthrottle */ |
2701 | ||
2702 | /* --------------------- Begin digi_send_break ----------------------- */ | |
2703 | ||
2704 | void digi_send_break(struct channel *ch, int msec) | |
2705 | { /* Begin digi_send_break */ | |
1da177e4 LT |
2706 | unsigned long flags; |
2707 | ||
f2cf8e25 | 2708 | spin_lock_irqsave(&epca_lock, flags); |
1da177e4 | 2709 | globalwinon(ch); |
1da177e4 LT |
2710 | /* -------------------------------------------------------------------- |
2711 | Maybe I should send an infinite break here, schedule() for | |
2712 | msec amount of time, and then stop the break. This way, | |
2713 | the user can't screw up the FEP by causing digi_send_break() | |
2714 | to be called (i.e. via an ioctl()) more than once in msec amount | |
2715 | of time. Try this for now... | |
2716 | ------------------------------------------------------------------------ */ | |
1da177e4 LT |
2717 | fepcmd(ch, SENDBREAK, msec, 0, 10, 0); |
2718 | memoff(ch); | |
f2cf8e25 | 2719 | spin_unlock_irqrestore(&epca_lock, flags); |
1da177e4 LT |
2720 | } /* End digi_send_break */ |
2721 | ||
2722 | /* --------------------- Begin setup_empty_event ----------------------- */ | |
2723 | ||
f2cf8e25 AC |
2724 | /* Caller MUST hold the lock */ |
2725 | ||
1da177e4 LT |
2726 | static void setup_empty_event(struct tty_struct *tty, struct channel *ch) |
2727 | { /* Begin setup_empty_event */ | |
2728 | ||
bc9a5154 | 2729 | struct board_chan __iomem *bc = ch->brdchan; |
1da177e4 | 2730 | |
1da177e4 LT |
2731 | globalwinon(ch); |
2732 | ch->statusflags |= EMPTYWAIT; | |
1da177e4 LT |
2733 | /* ------------------------------------------------------------------ |
2734 | When set the iempty flag request a event to be generated when the | |
2735 | transmit buffer is empty (If there is no BREAK in progress). | |
2736 | --------------------------------------------------------------------- */ | |
f2cf8e25 | 2737 | writeb(1, &bc->iempty); |
1da177e4 | 2738 | memoff(ch); |
1da177e4 LT |
2739 | } /* End setup_empty_event */ |
2740 | ||
2741 | /* --------------------- Begin get_termio ----------------------- */ | |
2742 | ||
2743 | static int get_termio(struct tty_struct * tty, struct termio __user * termio) | |
2744 | { /* Begin get_termio */ | |
2745 | return kernel_termios_to_user_termio(termio, tty->termios); | |
2746 | } /* End get_termio */ | |
f2cf8e25 | 2747 | |
1da177e4 LT |
2748 | /* ---------------------- Begin epca_setup -------------------------- */ |
2749 | void epca_setup(char *str, int *ints) | |
2750 | { /* Begin epca_setup */ | |
1da177e4 LT |
2751 | struct board_info board; |
2752 | int index, loop, last; | |
2753 | char *temp, *t2; | |
2754 | unsigned len; | |
2755 | ||
2756 | /* ---------------------------------------------------------------------- | |
2757 | If this routine looks a little strange it is because it is only called | |
2758 | if a LILO append command is given to boot the kernel with parameters. | |
2759 | In this way, we can provide the user a method of changing his board | |
2760 | configuration without rebuilding the kernel. | |
2761 | ----------------------------------------------------------------------- */ | |
2762 | if (!liloconfig) | |
2763 | liloconfig = 1; | |
2764 | ||
2765 | memset(&board, 0, sizeof(board)); | |
2766 | ||
2767 | /* Assume the data is int first, later we can change it */ | |
2768 | /* I think that array position 0 of ints holds the number of args */ | |
2769 | for (last = 0, index = 1; index <= ints[0]; index++) | |
2770 | switch(index) | |
2771 | { /* Begin parse switch */ | |
1da177e4 LT |
2772 | case 1: |
2773 | board.status = ints[index]; | |
1da177e4 LT |
2774 | /* --------------------------------------------------------- |
2775 | We check for 2 (As opposed to 1; because 2 is a flag | |
2776 | instructing the driver to ignore epcaconfig.) For this | |
2777 | reason we check for 2. | |
2778 | ------------------------------------------------------------ */ | |
f2cf8e25 | 2779 | if (board.status == 2) { /* Begin ignore epcaconfig as well as lilo cmd line */ |
1da177e4 LT |
2780 | nbdevs = 0; |
2781 | num_cards = 0; | |
2782 | return; | |
2783 | } /* End ignore epcaconfig as well as lilo cmd line */ | |
2784 | ||
f2cf8e25 AC |
2785 | if (board.status > 2) { |
2786 | printk(KERN_ERR "epca_setup: Invalid board status 0x%x\n", board.status); | |
1da177e4 LT |
2787 | invalid_lilo_config = 1; |
2788 | setup_error_code |= INVALID_BOARD_STATUS; | |
2789 | return; | |
2790 | } | |
2791 | last = index; | |
2792 | break; | |
1da177e4 LT |
2793 | case 2: |
2794 | board.type = ints[index]; | |
f2cf8e25 AC |
2795 | if (board.type >= PCIXEM) { |
2796 | printk(KERN_ERR "epca_setup: Invalid board type 0x%x\n", board.type); | |
1da177e4 LT |
2797 | invalid_lilo_config = 1; |
2798 | setup_error_code |= INVALID_BOARD_TYPE; | |
2799 | return; | |
2800 | } | |
2801 | last = index; | |
2802 | break; | |
1da177e4 LT |
2803 | case 3: |
2804 | board.altpin = ints[index]; | |
f2cf8e25 AC |
2805 | if (board.altpin > 1) { |
2806 | printk(KERN_ERR "epca_setup: Invalid board altpin 0x%x\n", board.altpin); | |
1da177e4 LT |
2807 | invalid_lilo_config = 1; |
2808 | setup_error_code |= INVALID_ALTPIN; | |
2809 | return; | |
2810 | } | |
2811 | last = index; | |
2812 | break; | |
2813 | ||
2814 | case 4: | |
2815 | board.numports = ints[index]; | |
f2cf8e25 AC |
2816 | if (board.numports < 2 || board.numports > 256) { |
2817 | printk(KERN_ERR "epca_setup: Invalid board numports 0x%x\n", board.numports); | |
1da177e4 LT |
2818 | invalid_lilo_config = 1; |
2819 | setup_error_code |= INVALID_NUM_PORTS; | |
2820 | return; | |
2821 | } | |
2822 | nbdevs += board.numports; | |
2823 | last = index; | |
2824 | break; | |
2825 | ||
2826 | case 5: | |
f2cf8e25 AC |
2827 | board.port = ints[index]; |
2828 | if (ints[index] <= 0) { | |
2829 | printk(KERN_ERR "epca_setup: Invalid io port 0x%x\n", (unsigned int)board.port); | |
1da177e4 LT |
2830 | invalid_lilo_config = 1; |
2831 | setup_error_code |= INVALID_PORT_BASE; | |
2832 | return; | |
2833 | } | |
2834 | last = index; | |
2835 | break; | |
2836 | ||
2837 | case 6: | |
f2cf8e25 AC |
2838 | board.membase = ints[index]; |
2839 | if (ints[index] <= 0) { | |
2840 | printk(KERN_ERR "epca_setup: Invalid memory base 0x%x\n",(unsigned int)board.membase); | |
1da177e4 LT |
2841 | invalid_lilo_config = 1; |
2842 | setup_error_code |= INVALID_MEM_BASE; | |
2843 | return; | |
2844 | } | |
2845 | last = index; | |
2846 | break; | |
2847 | ||
2848 | default: | |
2849 | printk(KERN_ERR "<Error> - epca_setup: Too many integer parms\n"); | |
2850 | return; | |
2851 | ||
2852 | } /* End parse switch */ | |
2853 | ||
f2cf8e25 | 2854 | while (str && *str) { /* Begin while there is a string arg */ |
1da177e4 LT |
2855 | /* find the next comma or terminator */ |
2856 | temp = str; | |
1da177e4 LT |
2857 | /* While string is not null, and a comma hasn't been found */ |
2858 | while (*temp && (*temp != ',')) | |
2859 | temp++; | |
1da177e4 LT |
2860 | if (!*temp) |
2861 | temp = NULL; | |
2862 | else | |
2863 | *temp++ = 0; | |
1da177e4 LT |
2864 | /* Set index to the number of args + 1 */ |
2865 | index = last + 1; | |
2866 | ||
2867 | switch(index) | |
2868 | { | |
2869 | case 1: | |
2870 | len = strlen(str); | |
2871 | if (strncmp("Disable", str, len) == 0) | |
2872 | board.status = 0; | |
f2cf8e25 | 2873 | else if (strncmp("Enable", str, len) == 0) |
1da177e4 | 2874 | board.status = 1; |
f2cf8e25 AC |
2875 | else { |
2876 | printk(KERN_ERR "epca_setup: Invalid status %s\n", str); | |
1da177e4 LT |
2877 | invalid_lilo_config = 1; |
2878 | setup_error_code |= INVALID_BOARD_STATUS; | |
2879 | return; | |
2880 | } | |
2881 | last = index; | |
2882 | break; | |
2883 | ||
2884 | case 2: | |
1da177e4 LT |
2885 | for(loop = 0; loop < EPCA_NUM_TYPES; loop++) |
2886 | if (strcmp(board_desc[loop], str) == 0) | |
2887 | break; | |
1da177e4 LT |
2888 | /* --------------------------------------------------------------- |
2889 | If the index incremented above refers to a legitamate board | |
2890 | type set it here. | |
2891 | ------------------------------------------------------------------*/ | |
1da177e4 LT |
2892 | if (index < EPCA_NUM_TYPES) |
2893 | board.type = loop; | |
f2cf8e25 AC |
2894 | else { |
2895 | printk(KERN_ERR "epca_setup: Invalid board type: %s\n", str); | |
1da177e4 LT |
2896 | invalid_lilo_config = 1; |
2897 | setup_error_code |= INVALID_BOARD_TYPE; | |
2898 | return; | |
2899 | } | |
2900 | last = index; | |
2901 | break; | |
2902 | ||
2903 | case 3: | |
2904 | len = strlen(str); | |
2905 | if (strncmp("Disable", str, len) == 0) | |
2906 | board.altpin = 0; | |
f2cf8e25 | 2907 | else if (strncmp("Enable", str, len) == 0) |
1da177e4 | 2908 | board.altpin = 1; |
f2cf8e25 AC |
2909 | else { |
2910 | printk(KERN_ERR "epca_setup: Invalid altpin %s\n", str); | |
1da177e4 LT |
2911 | invalid_lilo_config = 1; |
2912 | setup_error_code |= INVALID_ALTPIN; | |
2913 | return; | |
2914 | } | |
2915 | last = index; | |
2916 | break; | |
2917 | ||
2918 | case 4: | |
2919 | t2 = str; | |
2920 | while (isdigit(*t2)) | |
2921 | t2++; | |
2922 | ||
f2cf8e25 AC |
2923 | if (*t2) { |
2924 | printk(KERN_ERR "epca_setup: Invalid port count %s\n", str); | |
1da177e4 LT |
2925 | invalid_lilo_config = 1; |
2926 | setup_error_code |= INVALID_NUM_PORTS; | |
2927 | return; | |
2928 | } | |
2929 | ||
2930 | /* ------------------------------------------------------------ | |
2931 | There is not a man page for simple_strtoul but the code can be | |
2932 | found in vsprintf.c. The first argument is the string to | |
2933 | translate (To an unsigned long obviously), the second argument | |
2934 | can be the address of any character variable or a NULL. If a | |
2935 | variable is given, the end pointer of the string will be stored | |
2936 | in that variable; if a NULL is given the end pointer will | |
2937 | not be returned. The last argument is the base to use. If | |
2938 | a 0 is indicated, the routine will attempt to determine the | |
2939 | proper base by looking at the values prefix (A '0' for octal, | |
2940 | a 'x' for hex, etc ... If a value is given it will use that | |
2941 | value as the base. | |
2942 | ---------------------------------------------------------------- */ | |
2943 | board.numports = simple_strtoul(str, NULL, 0); | |
2944 | nbdevs += board.numports; | |
2945 | last = index; | |
2946 | break; | |
2947 | ||
2948 | case 5: | |
2949 | t2 = str; | |
2950 | while (isxdigit(*t2)) | |
2951 | t2++; | |
2952 | ||
f2cf8e25 AC |
2953 | if (*t2) { |
2954 | printk(KERN_ERR "epca_setup: Invalid i/o address %s\n", str); | |
1da177e4 LT |
2955 | invalid_lilo_config = 1; |
2956 | setup_error_code |= INVALID_PORT_BASE; | |
2957 | return; | |
2958 | } | |
2959 | ||
f2cf8e25 | 2960 | board.port = simple_strtoul(str, NULL, 16); |
1da177e4 LT |
2961 | last = index; |
2962 | break; | |
2963 | ||
2964 | case 6: | |
2965 | t2 = str; | |
2966 | while (isxdigit(*t2)) | |
2967 | t2++; | |
2968 | ||
f2cf8e25 AC |
2969 | if (*t2) { |
2970 | printk(KERN_ERR "epca_setup: Invalid memory base %s\n",str); | |
1da177e4 LT |
2971 | invalid_lilo_config = 1; |
2972 | setup_error_code |= INVALID_MEM_BASE; | |
2973 | return; | |
2974 | } | |
f2cf8e25 | 2975 | board.membase = simple_strtoul(str, NULL, 16); |
1da177e4 LT |
2976 | last = index; |
2977 | break; | |
1da177e4 | 2978 | default: |
f2cf8e25 | 2979 | printk(KERN_ERR "epca: Too many string parms\n"); |
1da177e4 LT |
2980 | return; |
2981 | } | |
2982 | str = temp; | |
1da177e4 LT |
2983 | } /* End while there is a string arg */ |
2984 | ||
f2cf8e25 AC |
2985 | if (last < 6) { |
2986 | printk(KERN_ERR "epca: Insufficient parms specified\n"); | |
1da177e4 LT |
2987 | return; |
2988 | } | |
2989 | ||
2990 | /* I should REALLY validate the stuff here */ | |
1da177e4 LT |
2991 | /* Copies our local copy of board into boards */ |
2992 | memcpy((void *)&boards[num_cards],(void *)&board, sizeof(board)); | |
1da177e4 | 2993 | /* Does this get called once per lilo arg are what ? */ |
1da177e4 LT |
2994 | printk(KERN_INFO "PC/Xx: Added board %i, %s %i ports at 0x%4.4X base 0x%6.6X\n", |
2995 | num_cards, board_desc[board.type], | |
2996 | board.numports, (int)board.port, (unsigned int) board.membase); | |
1da177e4 | 2997 | num_cards++; |
1da177e4 LT |
2998 | } /* End epca_setup */ |
2999 | ||
3000 | ||
1da177e4 LT |
3001 | /* ------------------------ Begin init_PCI --------------------------- */ |
3002 | ||
3003 | enum epic_board_types { | |
3004 | brd_xr = 0, | |
3005 | brd_xem, | |
3006 | brd_cx, | |
3007 | brd_xrj, | |
3008 | }; | |
3009 | ||
3010 | ||
3011 | /* indexed directly by epic_board_types enum */ | |
3012 | static struct { | |
3013 | unsigned char board_type; | |
3014 | unsigned bar_idx; /* PCI base address region */ | |
3015 | } epca_info_tbl[] = { | |
3016 | { PCIXR, 0, }, | |
3017 | { PCIXEM, 0, }, | |
3018 | { PCICX, 0, }, | |
3019 | { PCIXRJ, 2, }, | |
3020 | }; | |
3021 | ||
1da177e4 LT |
3022 | static int __devinit epca_init_one (struct pci_dev *pdev, |
3023 | const struct pci_device_id *ent) | |
3024 | { | |
3025 | static int board_num = -1; | |
3026 | int board_idx, info_idx = ent->driver_data; | |
3027 | unsigned long addr; | |
3028 | ||
3029 | if (pci_enable_device(pdev)) | |
3030 | return -EIO; | |
3031 | ||
3032 | board_num++; | |
3033 | board_idx = board_num + num_cards; | |
3034 | if (board_idx >= MAXBOARDS) | |
3035 | goto err_out; | |
3036 | ||
3037 | addr = pci_resource_start (pdev, epca_info_tbl[info_idx].bar_idx); | |
3038 | if (!addr) { | |
3039 | printk (KERN_ERR PFX "PCI region #%d not available (size 0)\n", | |
3040 | epca_info_tbl[info_idx].bar_idx); | |
3041 | goto err_out; | |
3042 | } | |
3043 | ||
3044 | boards[board_idx].status = ENABLED; | |
3045 | boards[board_idx].type = epca_info_tbl[info_idx].board_type; | |
3046 | boards[board_idx].numports = 0x0; | |
f2cf8e25 AC |
3047 | boards[board_idx].port = addr + PCI_IO_OFFSET; |
3048 | boards[board_idx].membase = addr; | |
1da177e4 LT |
3049 | |
3050 | if (!request_mem_region (addr + PCI_IO_OFFSET, 0x200000, "epca")) { | |
3051 | printk (KERN_ERR PFX "resource 0x%x @ 0x%lx unavailable\n", | |
3052 | 0x200000, addr + PCI_IO_OFFSET); | |
3053 | goto err_out; | |
3054 | } | |
3055 | ||
3056 | boards[board_idx].re_map_port = ioremap(addr + PCI_IO_OFFSET, 0x200000); | |
3057 | if (!boards[board_idx].re_map_port) { | |
3058 | printk (KERN_ERR PFX "cannot map 0x%x @ 0x%lx\n", | |
3059 | 0x200000, addr + PCI_IO_OFFSET); | |
3060 | goto err_out_free_pciio; | |
3061 | } | |
3062 | ||
3063 | if (!request_mem_region (addr, 0x200000, "epca")) { | |
3064 | printk (KERN_ERR PFX "resource 0x%x @ 0x%lx unavailable\n", | |
3065 | 0x200000, addr); | |
3066 | goto err_out_free_iounmap; | |
3067 | } | |
3068 | ||
3069 | boards[board_idx].re_map_membase = ioremap(addr, 0x200000); | |
3070 | if (!boards[board_idx].re_map_membase) { | |
3071 | printk (KERN_ERR PFX "cannot map 0x%x @ 0x%lx\n", | |
3072 | 0x200000, addr + PCI_IO_OFFSET); | |
3073 | goto err_out_free_memregion; | |
3074 | } | |
3075 | ||
3076 | /* -------------------------------------------------------------- | |
3077 | I don't know what the below does, but the hardware guys say | |
3078 | its required on everything except PLX (In this case XRJ). | |
3079 | ---------------------------------------------------------------- */ | |
3080 | if (info_idx != brd_xrj) { | |
3081 | pci_write_config_byte(pdev, 0x40, 0); | |
3082 | pci_write_config_byte(pdev, 0x46, 0); | |
3083 | } | |
3084 | ||
3085 | return 0; | |
3086 | ||
3087 | err_out_free_memregion: | |
3088 | release_mem_region (addr, 0x200000); | |
3089 | err_out_free_iounmap: | |
3090 | iounmap (boards[board_idx].re_map_port); | |
3091 | err_out_free_pciio: | |
3092 | release_mem_region (addr + PCI_IO_OFFSET, 0x200000); | |
3093 | err_out: | |
3094 | return -ENODEV; | |
3095 | } | |
3096 | ||
3097 | ||
3098 | static struct pci_device_id epca_pci_tbl[] = { | |
3099 | { PCI_VENDOR_DIGI, PCI_DEVICE_XR, PCI_ANY_ID, PCI_ANY_ID, 0, 0, brd_xr }, | |
3100 | { PCI_VENDOR_DIGI, PCI_DEVICE_XEM, PCI_ANY_ID, PCI_ANY_ID, 0, 0, brd_xem }, | |
3101 | { PCI_VENDOR_DIGI, PCI_DEVICE_CX, PCI_ANY_ID, PCI_ANY_ID, 0, 0, brd_cx }, | |
3102 | { PCI_VENDOR_DIGI, PCI_DEVICE_XRJ, PCI_ANY_ID, PCI_ANY_ID, 0, 0, brd_xrj }, | |
3103 | { 0, } | |
3104 | }; | |
3105 | ||
3106 | MODULE_DEVICE_TABLE(pci, epca_pci_tbl); | |
3107 | ||
3108 | int __init init_PCI (void) | |
f2cf8e25 | 3109 | { /* Begin init_PCI */ |
1da177e4 LT |
3110 | memset (&epca_driver, 0, sizeof (epca_driver)); |
3111 | epca_driver.name = "epca"; | |
3112 | epca_driver.id_table = epca_pci_tbl; | |
3113 | epca_driver.probe = epca_init_one; | |
3114 | ||
3115 | return pci_register_driver(&epca_driver); | |
f2cf8e25 | 3116 | } |
1da177e4 LT |
3117 | |
3118 | MODULE_LICENSE("GPL"); |