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Commit | Line | Data |
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6fd5ea63 HL |
1 | /* |
2 | * Stuff used by all variants of the driver | |
3 | * | |
4 | * Copyright (c) 2001 by Stefan Eilers <Eilers.Stefan@epost.de>, | |
5 | * Hansjoerg Lipp <hjlipp@web.de>, | |
6 | * Tilman Schmidt <tilman@imap.cc>. | |
7 | * | |
8 | * ===================================================================== | |
9 | * This program is free software; you can redistribute it and/or | |
10 | * modify it under the terms of the GNU General Public License as | |
11 | * published by the Free Software Foundation; either version 2 of | |
12 | * the License, or (at your option) any later version. | |
13 | * ===================================================================== | |
6fd5ea63 HL |
14 | */ |
15 | ||
16 | #include "gigaset.h" | |
17 | #include <linux/ctype.h> | |
18 | #include <linux/module.h> | |
19 | #include <linux/moduleparam.h> | |
20 | ||
21 | /* Version Information */ | |
22 | #define DRIVER_AUTHOR "Hansjoerg Lipp <hjlipp@web.de>, Tilman Schmidt <tilman@imap.cc>, Stefan Eilers <Eilers.Stefan@epost.de>" | |
23 | #define DRIVER_DESC "Driver for Gigaset 307x" | |
24 | ||
25 | /* Module parameters */ | |
26 | int gigaset_debuglevel = DEBUG_DEFAULT; | |
27 | EXPORT_SYMBOL_GPL(gigaset_debuglevel); | |
28 | module_param_named(debug, gigaset_debuglevel, int, S_IRUGO|S_IWUSR); | |
29 | MODULE_PARM_DESC(debug, "debug level"); | |
30 | ||
31 | /*====================================================================== | |
32 | Prototypes of internal functions | |
33 | */ | |
34 | ||
6fd5ea63 HL |
35 | static struct cardstate *alloc_cs(struct gigaset_driver *drv); |
36 | static void free_cs(struct cardstate *cs); | |
37 | static void make_valid(struct cardstate *cs, unsigned mask); | |
38 | static void make_invalid(struct cardstate *cs, unsigned mask); | |
39 | ||
784d5858 TS |
40 | #define VALID_MINOR 0x01 |
41 | #define VALID_ID 0x02 | |
42 | #define ASSIGNED 0x04 | |
6fd5ea63 HL |
43 | |
44 | /* bitwise byte inversion table */ | |
45 | __u8 gigaset_invtab[256] = { | |
46 | 0x00, 0x80, 0x40, 0xc0, 0x20, 0xa0, 0x60, 0xe0, | |
47 | 0x10, 0x90, 0x50, 0xd0, 0x30, 0xb0, 0x70, 0xf0, | |
48 | 0x08, 0x88, 0x48, 0xc8, 0x28, 0xa8, 0x68, 0xe8, | |
49 | 0x18, 0x98, 0x58, 0xd8, 0x38, 0xb8, 0x78, 0xf8, | |
50 | 0x04, 0x84, 0x44, 0xc4, 0x24, 0xa4, 0x64, 0xe4, | |
51 | 0x14, 0x94, 0x54, 0xd4, 0x34, 0xb4, 0x74, 0xf4, | |
52 | 0x0c, 0x8c, 0x4c, 0xcc, 0x2c, 0xac, 0x6c, 0xec, | |
53 | 0x1c, 0x9c, 0x5c, 0xdc, 0x3c, 0xbc, 0x7c, 0xfc, | |
54 | 0x02, 0x82, 0x42, 0xc2, 0x22, 0xa2, 0x62, 0xe2, | |
55 | 0x12, 0x92, 0x52, 0xd2, 0x32, 0xb2, 0x72, 0xf2, | |
56 | 0x0a, 0x8a, 0x4a, 0xca, 0x2a, 0xaa, 0x6a, 0xea, | |
57 | 0x1a, 0x9a, 0x5a, 0xda, 0x3a, 0xba, 0x7a, 0xfa, | |
58 | 0x06, 0x86, 0x46, 0xc6, 0x26, 0xa6, 0x66, 0xe6, | |
59 | 0x16, 0x96, 0x56, 0xd6, 0x36, 0xb6, 0x76, 0xf6, | |
60 | 0x0e, 0x8e, 0x4e, 0xce, 0x2e, 0xae, 0x6e, 0xee, | |
61 | 0x1e, 0x9e, 0x5e, 0xde, 0x3e, 0xbe, 0x7e, 0xfe, | |
62 | 0x01, 0x81, 0x41, 0xc1, 0x21, 0xa1, 0x61, 0xe1, | |
63 | 0x11, 0x91, 0x51, 0xd1, 0x31, 0xb1, 0x71, 0xf1, | |
64 | 0x09, 0x89, 0x49, 0xc9, 0x29, 0xa9, 0x69, 0xe9, | |
65 | 0x19, 0x99, 0x59, 0xd9, 0x39, 0xb9, 0x79, 0xf9, | |
66 | 0x05, 0x85, 0x45, 0xc5, 0x25, 0xa5, 0x65, 0xe5, | |
67 | 0x15, 0x95, 0x55, 0xd5, 0x35, 0xb5, 0x75, 0xf5, | |
68 | 0x0d, 0x8d, 0x4d, 0xcd, 0x2d, 0xad, 0x6d, 0xed, | |
69 | 0x1d, 0x9d, 0x5d, 0xdd, 0x3d, 0xbd, 0x7d, 0xfd, | |
70 | 0x03, 0x83, 0x43, 0xc3, 0x23, 0xa3, 0x63, 0xe3, | |
71 | 0x13, 0x93, 0x53, 0xd3, 0x33, 0xb3, 0x73, 0xf3, | |
72 | 0x0b, 0x8b, 0x4b, 0xcb, 0x2b, 0xab, 0x6b, 0xeb, | |
73 | 0x1b, 0x9b, 0x5b, 0xdb, 0x3b, 0xbb, 0x7b, 0xfb, | |
74 | 0x07, 0x87, 0x47, 0xc7, 0x27, 0xa7, 0x67, 0xe7, | |
75 | 0x17, 0x97, 0x57, 0xd7, 0x37, 0xb7, 0x77, 0xf7, | |
76 | 0x0f, 0x8f, 0x4f, 0xcf, 0x2f, 0xaf, 0x6f, 0xef, | |
77 | 0x1f, 0x9f, 0x5f, 0xdf, 0x3f, 0xbf, 0x7f, 0xff | |
78 | }; | |
79 | EXPORT_SYMBOL_GPL(gigaset_invtab); | |
80 | ||
81 | void gigaset_dbg_buffer(enum debuglevel level, const unsigned char *msg, | |
01371500 | 82 | size_t len, const unsigned char *buf) |
6fd5ea63 HL |
83 | { |
84 | unsigned char outbuf[80]; | |
784d5858 | 85 | unsigned char c; |
6fd5ea63 HL |
86 | size_t space = sizeof outbuf - 1; |
87 | unsigned char *out = outbuf; | |
01371500 | 88 | size_t numin = len; |
6fd5ea63 | 89 | |
01371500 | 90 | while (numin--) { |
784d5858 TS |
91 | c = *buf++; |
92 | if (c == '~' || c == '^' || c == '\\') { | |
01371500 | 93 | if (!space--) |
784d5858 TS |
94 | break; |
95 | *out++ = '\\'; | |
96 | } | |
97 | if (c & 0x80) { | |
01371500 | 98 | if (!space--) |
784d5858 TS |
99 | break; |
100 | *out++ = '~'; | |
101 | c ^= 0x80; | |
102 | } | |
103 | if (c < 0x20 || c == 0x7f) { | |
01371500 | 104 | if (!space--) |
784d5858 | 105 | break; |
6fd5ea63 | 106 | *out++ = '^'; |
784d5858 | 107 | c ^= 0x40; |
6fd5ea63 | 108 | } |
01371500 | 109 | if (!space--) |
784d5858 TS |
110 | break; |
111 | *out++ = c; | |
6fd5ea63 HL |
112 | } |
113 | *out = 0; | |
114 | ||
784d5858 | 115 | gig_dbg(level, "%s (%u bytes): %s", msg, (unsigned) len, outbuf); |
6fd5ea63 HL |
116 | } |
117 | EXPORT_SYMBOL_GPL(gigaset_dbg_buffer); | |
118 | ||
119 | static int setflags(struct cardstate *cs, unsigned flags, unsigned delay) | |
120 | { | |
121 | int r; | |
122 | ||
123 | r = cs->ops->set_modem_ctrl(cs, cs->control_state, flags); | |
124 | cs->control_state = flags; | |
125 | if (r < 0) | |
126 | return r; | |
127 | ||
128 | if (delay) { | |
129 | set_current_state(TASK_INTERRUPTIBLE); | |
130 | schedule_timeout(delay * HZ / 1000); | |
131 | } | |
132 | ||
133 | return 0; | |
134 | } | |
135 | ||
136 | int gigaset_enterconfigmode(struct cardstate *cs) | |
137 | { | |
138 | int i, r; | |
139 | ||
140 | if (!atomic_read(&cs->connected)) { | |
141 | err("not connected!"); | |
142 | return -1; | |
143 | } | |
144 | ||
145 | cs->control_state = TIOCM_RTS; //FIXME | |
146 | ||
147 | r = setflags(cs, TIOCM_DTR, 200); | |
148 | if (r < 0) | |
149 | goto error; | |
150 | r = setflags(cs, 0, 200); | |
151 | if (r < 0) | |
152 | goto error; | |
153 | for (i = 0; i < 5; ++i) { | |
154 | r = setflags(cs, TIOCM_RTS, 100); | |
155 | if (r < 0) | |
156 | goto error; | |
157 | r = setflags(cs, 0, 100); | |
158 | if (r < 0) | |
159 | goto error; | |
160 | } | |
161 | r = setflags(cs, TIOCM_RTS|TIOCM_DTR, 800); | |
162 | if (r < 0) | |
163 | goto error; | |
164 | ||
165 | return 0; | |
166 | ||
167 | error: | |
784d5858 | 168 | dev_err(cs->dev, "error %d on setuartbits\n", -r); |
6fd5ea63 HL |
169 | cs->control_state = TIOCM_RTS|TIOCM_DTR; // FIXME is this a good value? |
170 | cs->ops->set_modem_ctrl(cs, 0, TIOCM_RTS|TIOCM_DTR); | |
171 | ||
172 | return -1; //r | |
173 | } | |
174 | ||
175 | static int test_timeout(struct at_state_t *at_state) | |
176 | { | |
177 | if (!at_state->timer_expires) | |
178 | return 0; | |
179 | ||
180 | if (--at_state->timer_expires) { | |
784d5858 TS |
181 | gig_dbg(DEBUG_MCMD, "decreased timer of %p to %lu", |
182 | at_state, at_state->timer_expires); | |
6fd5ea63 HL |
183 | return 0; |
184 | } | |
185 | ||
186 | if (!gigaset_add_event(at_state->cs, at_state, EV_TIMEOUT, NULL, | |
784d5858 | 187 | atomic_read(&at_state->timer_index), NULL)) { |
6fd5ea63 HL |
188 | //FIXME what should we do? |
189 | } | |
190 | ||
191 | return 1; | |
192 | } | |
193 | ||
194 | static void timer_tick(unsigned long data) | |
195 | { | |
196 | struct cardstate *cs = (struct cardstate *) data; | |
197 | unsigned long flags; | |
198 | unsigned channel; | |
199 | struct at_state_t *at_state; | |
200 | int timeout = 0; | |
201 | ||
202 | spin_lock_irqsave(&cs->lock, flags); | |
203 | ||
204 | for (channel = 0; channel < cs->channels; ++channel) | |
205 | if (test_timeout(&cs->bcs[channel].at_state)) | |
206 | timeout = 1; | |
207 | ||
208 | if (test_timeout(&cs->at_state)) | |
209 | timeout = 1; | |
210 | ||
211 | list_for_each_entry(at_state, &cs->temp_at_states, list) | |
212 | if (test_timeout(at_state)) | |
213 | timeout = 1; | |
214 | ||
215 | if (atomic_read(&cs->running)) { | |
ec81b5e6 | 216 | mod_timer(&cs->timer, jiffies + msecs_to_jiffies(GIG_TICK)); |
6fd5ea63 | 217 | if (timeout) { |
784d5858 | 218 | gig_dbg(DEBUG_CMD, "scheduling timeout"); |
6fd5ea63 HL |
219 | tasklet_schedule(&cs->event_tasklet); |
220 | } | |
221 | } | |
222 | ||
223 | spin_unlock_irqrestore(&cs->lock, flags); | |
224 | } | |
225 | ||
226 | int gigaset_get_channel(struct bc_state *bcs) | |
227 | { | |
228 | unsigned long flags; | |
229 | ||
230 | spin_lock_irqsave(&bcs->cs->lock, flags); | |
231 | if (bcs->use_count) { | |
784d5858 TS |
232 | gig_dbg(DEBUG_ANY, "could not allocate channel %d", |
233 | bcs->channel); | |
6fd5ea63 HL |
234 | spin_unlock_irqrestore(&bcs->cs->lock, flags); |
235 | return 0; | |
236 | } | |
237 | ++bcs->use_count; | |
238 | bcs->busy = 1; | |
784d5858 | 239 | gig_dbg(DEBUG_ANY, "allocated channel %d", bcs->channel); |
6fd5ea63 HL |
240 | spin_unlock_irqrestore(&bcs->cs->lock, flags); |
241 | return 1; | |
242 | } | |
243 | ||
244 | void gigaset_free_channel(struct bc_state *bcs) | |
245 | { | |
246 | unsigned long flags; | |
247 | ||
248 | spin_lock_irqsave(&bcs->cs->lock, flags); | |
249 | if (!bcs->busy) { | |
784d5858 | 250 | gig_dbg(DEBUG_ANY, "could not free channel %d", bcs->channel); |
6fd5ea63 HL |
251 | spin_unlock_irqrestore(&bcs->cs->lock, flags); |
252 | return; | |
253 | } | |
254 | --bcs->use_count; | |
255 | bcs->busy = 0; | |
784d5858 | 256 | gig_dbg(DEBUG_ANY, "freed channel %d", bcs->channel); |
6fd5ea63 HL |
257 | spin_unlock_irqrestore(&bcs->cs->lock, flags); |
258 | } | |
259 | ||
260 | int gigaset_get_channels(struct cardstate *cs) | |
261 | { | |
262 | unsigned long flags; | |
263 | int i; | |
264 | ||
265 | spin_lock_irqsave(&cs->lock, flags); | |
266 | for (i = 0; i < cs->channels; ++i) | |
267 | if (cs->bcs[i].use_count) { | |
268 | spin_unlock_irqrestore(&cs->lock, flags); | |
784d5858 | 269 | gig_dbg(DEBUG_ANY, "could not allocate all channels"); |
6fd5ea63 HL |
270 | return 0; |
271 | } | |
272 | for (i = 0; i < cs->channels; ++i) | |
273 | ++cs->bcs[i].use_count; | |
274 | spin_unlock_irqrestore(&cs->lock, flags); | |
275 | ||
784d5858 | 276 | gig_dbg(DEBUG_ANY, "allocated all channels"); |
6fd5ea63 HL |
277 | |
278 | return 1; | |
279 | } | |
280 | ||
281 | void gigaset_free_channels(struct cardstate *cs) | |
282 | { | |
283 | unsigned long flags; | |
284 | int i; | |
285 | ||
784d5858 | 286 | gig_dbg(DEBUG_ANY, "unblocking all channels"); |
6fd5ea63 HL |
287 | spin_lock_irqsave(&cs->lock, flags); |
288 | for (i = 0; i < cs->channels; ++i) | |
289 | --cs->bcs[i].use_count; | |
290 | spin_unlock_irqrestore(&cs->lock, flags); | |
291 | } | |
292 | ||
293 | void gigaset_block_channels(struct cardstate *cs) | |
294 | { | |
295 | unsigned long flags; | |
296 | int i; | |
297 | ||
784d5858 | 298 | gig_dbg(DEBUG_ANY, "blocking all channels"); |
6fd5ea63 HL |
299 | spin_lock_irqsave(&cs->lock, flags); |
300 | for (i = 0; i < cs->channels; ++i) | |
301 | ++cs->bcs[i].use_count; | |
302 | spin_unlock_irqrestore(&cs->lock, flags); | |
303 | } | |
304 | ||
305 | static void clear_events(struct cardstate *cs) | |
306 | { | |
307 | struct event_t *ev; | |
308 | unsigned head, tail; | |
309 | ||
310 | /* no locking needed (no reader/writer allowed) */ | |
311 | ||
312 | head = atomic_read(&cs->ev_head); | |
313 | tail = atomic_read(&cs->ev_tail); | |
314 | ||
315 | while (tail != head) { | |
316 | ev = cs->events + head; | |
317 | kfree(ev->ptr); | |
318 | ||
319 | head = (head + 1) % MAX_EVENTS; | |
320 | } | |
321 | ||
322 | atomic_set(&cs->ev_head, tail); | |
323 | } | |
324 | ||
325 | struct event_t *gigaset_add_event(struct cardstate *cs, | |
784d5858 TS |
326 | struct at_state_t *at_state, int type, |
327 | void *ptr, int parameter, void *arg) | |
6fd5ea63 HL |
328 | { |
329 | unsigned long flags; | |
330 | unsigned next, tail; | |
331 | struct event_t *event = NULL; | |
332 | ||
333 | spin_lock_irqsave(&cs->ev_lock, flags); | |
334 | ||
335 | tail = atomic_read(&cs->ev_tail); | |
336 | next = (tail + 1) % MAX_EVENTS; | |
337 | if (unlikely(next == atomic_read(&cs->ev_head))) | |
338 | err("event queue full"); | |
339 | else { | |
340 | event = cs->events + tail; | |
341 | event->type = type; | |
342 | event->at_state = at_state; | |
343 | event->cid = -1; | |
344 | event->ptr = ptr; | |
345 | event->arg = arg; | |
346 | event->parameter = parameter; | |
347 | atomic_set(&cs->ev_tail, next); | |
348 | } | |
349 | ||
350 | spin_unlock_irqrestore(&cs->ev_lock, flags); | |
351 | ||
352 | return event; | |
353 | } | |
354 | EXPORT_SYMBOL_GPL(gigaset_add_event); | |
355 | ||
356 | static void free_strings(struct at_state_t *at_state) | |
357 | { | |
358 | int i; | |
359 | ||
360 | for (i = 0; i < STR_NUM; ++i) { | |
361 | kfree(at_state->str_var[i]); | |
362 | at_state->str_var[i] = NULL; | |
363 | } | |
364 | } | |
365 | ||
366 | static void clear_at_state(struct at_state_t *at_state) | |
367 | { | |
368 | free_strings(at_state); | |
369 | } | |
370 | ||
371 | static void dealloc_at_states(struct cardstate *cs) | |
372 | { | |
373 | struct at_state_t *cur, *next; | |
374 | ||
375 | list_for_each_entry_safe(cur, next, &cs->temp_at_states, list) { | |
376 | list_del(&cur->list); | |
377 | free_strings(cur); | |
378 | kfree(cur); | |
379 | } | |
380 | } | |
381 | ||
382 | static void gigaset_freebcs(struct bc_state *bcs) | |
383 | { | |
384 | int i; | |
385 | ||
784d5858 | 386 | gig_dbg(DEBUG_INIT, "freeing bcs[%d]->hw", bcs->channel); |
6fd5ea63 | 387 | if (!bcs->cs->ops->freebcshw(bcs)) { |
784d5858 | 388 | gig_dbg(DEBUG_INIT, "failed"); |
6fd5ea63 HL |
389 | } |
390 | ||
784d5858 | 391 | gig_dbg(DEBUG_INIT, "clearing bcs[%d]->at_state", bcs->channel); |
6fd5ea63 | 392 | clear_at_state(&bcs->at_state); |
784d5858 | 393 | gig_dbg(DEBUG_INIT, "freeing bcs[%d]->skb", bcs->channel); |
6fd5ea63 HL |
394 | |
395 | if (bcs->skb) | |
396 | dev_kfree_skb(bcs->skb); | |
397 | for (i = 0; i < AT_NUM; ++i) { | |
398 | kfree(bcs->commands[i]); | |
399 | bcs->commands[i] = NULL; | |
400 | } | |
401 | } | |
402 | ||
403 | void gigaset_freecs(struct cardstate *cs) | |
404 | { | |
405 | int i; | |
406 | unsigned long flags; | |
407 | ||
408 | if (!cs) | |
409 | return; | |
410 | ||
abfd1dc7 | 411 | mutex_lock(&cs->mutex); |
6fd5ea63 HL |
412 | |
413 | if (!cs->bcs) | |
414 | goto f_cs; | |
415 | if (!cs->inbuf) | |
416 | goto f_bcs; | |
417 | ||
418 | spin_lock_irqsave(&cs->lock, flags); | |
419 | atomic_set(&cs->running, 0); | |
917f5085 TS |
420 | spin_unlock_irqrestore(&cs->lock, flags); /* event handler and timer are |
421 | not rescheduled below */ | |
6fd5ea63 HL |
422 | |
423 | tasklet_kill(&cs->event_tasklet); | |
424 | del_timer_sync(&cs->timer); | |
425 | ||
426 | switch (cs->cs_init) { | |
427 | default: | |
428 | gigaset_if_free(cs); | |
429 | ||
784d5858 | 430 | gig_dbg(DEBUG_INIT, "clearing hw"); |
6fd5ea63 HL |
431 | cs->ops->freecshw(cs); |
432 | ||
433 | //FIXME cmdbuf | |
434 | ||
435 | /* fall through */ | |
436 | case 2: /* error in initcshw */ | |
437 | /* Deregister from LL */ | |
438 | make_invalid(cs, VALID_ID); | |
784d5858 | 439 | gig_dbg(DEBUG_INIT, "clearing iif"); |
6fd5ea63 HL |
440 | gigaset_i4l_cmd(cs, ISDN_STAT_UNLOAD); |
441 | ||
442 | /* fall through */ | |
443 | case 1: /* error when regestering to LL */ | |
784d5858 | 444 | gig_dbg(DEBUG_INIT, "clearing at_state"); |
6fd5ea63 HL |
445 | clear_at_state(&cs->at_state); |
446 | dealloc_at_states(cs); | |
447 | ||
448 | /* fall through */ | |
449 | case 0: /* error in one call to initbcs */ | |
450 | for (i = 0; i < cs->channels; ++i) { | |
784d5858 | 451 | gig_dbg(DEBUG_INIT, "clearing bcs[%d]", i); |
6fd5ea63 HL |
452 | gigaset_freebcs(cs->bcs + i); |
453 | } | |
454 | ||
455 | clear_events(cs); | |
784d5858 | 456 | gig_dbg(DEBUG_INIT, "freeing inbuf"); |
6fd5ea63 HL |
457 | kfree(cs->inbuf); |
458 | } | |
784d5858 | 459 | f_bcs: gig_dbg(DEBUG_INIT, "freeing bcs[]"); |
6fd5ea63 | 460 | kfree(cs->bcs); |
784d5858 | 461 | f_cs: gig_dbg(DEBUG_INIT, "freeing cs"); |
abfd1dc7 | 462 | mutex_unlock(&cs->mutex); |
6fd5ea63 HL |
463 | free_cs(cs); |
464 | } | |
465 | EXPORT_SYMBOL_GPL(gigaset_freecs); | |
466 | ||
467 | void gigaset_at_init(struct at_state_t *at_state, struct bc_state *bcs, | |
784d5858 | 468 | struct cardstate *cs, int cid) |
6fd5ea63 HL |
469 | { |
470 | int i; | |
471 | ||
472 | INIT_LIST_HEAD(&at_state->list); | |
473 | at_state->waiting = 0; | |
474 | at_state->getstring = 0; | |
475 | at_state->pending_commands = 0; | |
476 | at_state->timer_expires = 0; | |
477 | at_state->timer_active = 0; | |
478 | atomic_set(&at_state->timer_index, 0); | |
479 | atomic_set(&at_state->seq_index, 0); | |
480 | at_state->ConState = 0; | |
481 | for (i = 0; i < STR_NUM; ++i) | |
482 | at_state->str_var[i] = NULL; | |
483 | at_state->int_var[VAR_ZDLE] = 0; | |
484 | at_state->int_var[VAR_ZCTP] = -1; | |
485 | at_state->int_var[VAR_ZSAU] = ZSAU_NULL; | |
486 | at_state->cs = cs; | |
487 | at_state->bcs = bcs; | |
488 | at_state->cid = cid; | |
489 | if (!cid) | |
490 | at_state->replystruct = cs->tabnocid; | |
491 | else | |
492 | at_state->replystruct = cs->tabcid; | |
493 | } | |
494 | ||
495 | ||
496 | static void gigaset_inbuf_init(struct inbuf_t *inbuf, struct bc_state *bcs, | |
784d5858 | 497 | struct cardstate *cs, int inputstate) |
6fd5ea63 HL |
498 | /* inbuf->read must be allocated before! */ |
499 | { | |
500 | atomic_set(&inbuf->head, 0); | |
501 | atomic_set(&inbuf->tail, 0); | |
502 | inbuf->cs = cs; | |
503 | inbuf->bcs = bcs; /*base driver: NULL*/ | |
504 | inbuf->rcvbuf = NULL; //FIXME | |
505 | inbuf->inputstate = inputstate; | |
506 | } | |
507 | ||
714e8236 TS |
508 | /* append received bytes to inbuf */ |
509 | int gigaset_fill_inbuf(struct inbuf_t *inbuf, const unsigned char *src, | |
510 | unsigned numbytes) | |
511 | { | |
512 | unsigned n, head, tail, bytesleft; | |
513 | ||
514 | gig_dbg(DEBUG_INTR, "received %u bytes", numbytes); | |
515 | ||
516 | if (!numbytes) | |
517 | return 0; | |
518 | ||
519 | bytesleft = numbytes; | |
520 | tail = atomic_read(&inbuf->tail); | |
521 | head = atomic_read(&inbuf->head); | |
522 | gig_dbg(DEBUG_INTR, "buffer state: %u -> %u", head, tail); | |
523 | ||
524 | while (bytesleft) { | |
525 | if (head > tail) | |
526 | n = head - 1 - tail; | |
527 | else if (head == 0) | |
528 | n = (RBUFSIZE-1) - tail; | |
529 | else | |
530 | n = RBUFSIZE - tail; | |
531 | if (!n) { | |
532 | dev_err(inbuf->cs->dev, | |
533 | "buffer overflow (%u bytes lost)", bytesleft); | |
534 | break; | |
535 | } | |
536 | if (n > bytesleft) | |
537 | n = bytesleft; | |
538 | memcpy(inbuf->data + tail, src, n); | |
539 | bytesleft -= n; | |
540 | tail = (tail + n) % RBUFSIZE; | |
541 | src += n; | |
542 | } | |
543 | gig_dbg(DEBUG_INTR, "setting tail to %u", tail); | |
544 | atomic_set(&inbuf->tail, tail); | |
545 | return numbytes != bytesleft; | |
546 | } | |
547 | EXPORT_SYMBOL_GPL(gigaset_fill_inbuf); | |
548 | ||
6fd5ea63 HL |
549 | /* Initialize the b-channel structure */ |
550 | static struct bc_state *gigaset_initbcs(struct bc_state *bcs, | |
784d5858 | 551 | struct cardstate *cs, int channel) |
6fd5ea63 HL |
552 | { |
553 | int i; | |
554 | ||
555 | bcs->tx_skb = NULL; //FIXME -> hw part | |
556 | ||
557 | skb_queue_head_init(&bcs->squeue); | |
558 | ||
559 | bcs->corrupted = 0; | |
560 | bcs->trans_down = 0; | |
561 | bcs->trans_up = 0; | |
562 | ||
784d5858 | 563 | gig_dbg(DEBUG_INIT, "setting up bcs[%d]->at_state", channel); |
6fd5ea63 HL |
564 | gigaset_at_init(&bcs->at_state, bcs, cs, -1); |
565 | ||
566 | bcs->rcvbytes = 0; | |
567 | ||
568 | #ifdef CONFIG_GIGASET_DEBUG | |
569 | bcs->emptycount = 0; | |
570 | #endif | |
571 | ||
784d5858 | 572 | gig_dbg(DEBUG_INIT, "allocating bcs[%d]->skb", channel); |
6fd5ea63 HL |
573 | bcs->fcs = PPP_INITFCS; |
574 | bcs->inputstate = 0; | |
575 | if (cs->ignoreframes) { | |
576 | bcs->inputstate |= INS_skip_frame; | |
577 | bcs->skb = NULL; | |
578 | } else if ((bcs->skb = dev_alloc_skb(SBUFSIZE + HW_HDR_LEN)) != NULL) | |
579 | skb_reserve(bcs->skb, HW_HDR_LEN); | |
580 | else { | |
784d5858 | 581 | dev_warn(cs->dev, "could not allocate skb\n"); |
6fd5ea63 HL |
582 | bcs->inputstate |= INS_skip_frame; |
583 | } | |
584 | ||
585 | bcs->channel = channel; | |
586 | bcs->cs = cs; | |
587 | ||
588 | bcs->chstate = 0; | |
589 | bcs->use_count = 1; | |
590 | bcs->busy = 0; | |
591 | bcs->ignore = cs->ignoreframes; | |
592 | ||
593 | for (i = 0; i < AT_NUM; ++i) | |
594 | bcs->commands[i] = NULL; | |
595 | ||
784d5858 | 596 | gig_dbg(DEBUG_INIT, " setting up bcs[%d]->hw", channel); |
6fd5ea63 HL |
597 | if (cs->ops->initbcshw(bcs)) |
598 | return bcs; | |
599 | ||
784d5858 | 600 | gig_dbg(DEBUG_INIT, " failed"); |
6fd5ea63 | 601 | |
784d5858 | 602 | gig_dbg(DEBUG_INIT, " freeing bcs[%d]->skb", channel); |
6fd5ea63 HL |
603 | if (bcs->skb) |
604 | dev_kfree_skb(bcs->skb); | |
605 | ||
606 | return NULL; | |
607 | } | |
608 | ||
609 | /* gigaset_initcs | |
610 | * Allocate and initialize cardstate structure for Gigaset driver | |
611 | * Calls hardware dependent gigaset_initcshw() function | |
612 | * Calls B channel initialization function gigaset_initbcs() for each B channel | |
613 | * parameters: | |
784d5858 | 614 | * drv hardware driver the device belongs to |
6fd5ea63 | 615 | * channels number of B channels supported by device |
917f5085 TS |
616 | * onechannel !=0: B channel data and AT commands share one |
617 | * communication channel | |
6fd5ea63 HL |
618 | * ==0: B channels have separate communication channels |
619 | * ignoreframes number of frames to ignore after setting up B channel | |
620 | * cidmode !=0: start in CallID mode | |
621 | * modulename name of driver module (used for I4L registration) | |
622 | * return value: | |
623 | * pointer to cardstate structure | |
624 | */ | |
625 | struct cardstate *gigaset_initcs(struct gigaset_driver *drv, int channels, | |
626 | int onechannel, int ignoreframes, | |
627 | int cidmode, const char *modulename) | |
628 | { | |
629 | struct cardstate *cs = NULL; | |
630 | int i; | |
631 | ||
784d5858 | 632 | gig_dbg(DEBUG_INIT, "allocating cs"); |
6fd5ea63 HL |
633 | cs = alloc_cs(drv); |
634 | if (!cs) | |
635 | goto error; | |
784d5858 | 636 | gig_dbg(DEBUG_INIT, "allocating bcs[0..%d]", channels - 1); |
6fd5ea63 HL |
637 | cs->bcs = kmalloc(channels * sizeof(struct bc_state), GFP_KERNEL); |
638 | if (!cs->bcs) | |
639 | goto error; | |
784d5858 | 640 | gig_dbg(DEBUG_INIT, "allocating inbuf"); |
6fd5ea63 HL |
641 | cs->inbuf = kmalloc(sizeof(struct inbuf_t), GFP_KERNEL); |
642 | if (!cs->inbuf) | |
643 | goto error; | |
644 | ||
645 | cs->cs_init = 0; | |
646 | cs->channels = channels; | |
647 | cs->onechannel = onechannel; | |
648 | cs->ignoreframes = ignoreframes; | |
649 | INIT_LIST_HEAD(&cs->temp_at_states); | |
650 | atomic_set(&cs->running, 0); | |
651 | init_timer(&cs->timer); /* clear next & prev */ | |
652 | spin_lock_init(&cs->ev_lock); | |
653 | atomic_set(&cs->ev_tail, 0); | |
654 | atomic_set(&cs->ev_head, 0); | |
abfd1dc7 TS |
655 | mutex_init(&cs->mutex); |
656 | mutex_lock(&cs->mutex); | |
657 | ||
917f5085 TS |
658 | tasklet_init(&cs->event_tasklet, &gigaset_handle_event, |
659 | (unsigned long) cs); | |
6fd5ea63 HL |
660 | atomic_set(&cs->commands_pending, 0); |
661 | cs->cur_at_seq = 0; | |
662 | cs->gotfwver = -1; | |
663 | cs->open_count = 0; | |
784d5858 | 664 | cs->dev = NULL; |
6fd5ea63 HL |
665 | cs->tty = NULL; |
666 | atomic_set(&cs->cidmode, cidmode != 0); | |
667 | ||
668 | //if(onechannel) { //FIXME | |
669 | cs->tabnocid = gigaset_tab_nocid_m10x; | |
670 | cs->tabcid = gigaset_tab_cid_m10x; | |
671 | //} else { | |
672 | // cs->tabnocid = gigaset_tab_nocid; | |
673 | // cs->tabcid = gigaset_tab_cid; | |
674 | //} | |
675 | ||
676 | init_waitqueue_head(&cs->waitqueue); | |
677 | cs->waiting = 0; | |
678 | ||
679 | atomic_set(&cs->mode, M_UNKNOWN); | |
680 | atomic_set(&cs->mstate, MS_UNINITIALIZED); | |
681 | ||
682 | for (i = 0; i < channels; ++i) { | |
784d5858 | 683 | gig_dbg(DEBUG_INIT, "setting up bcs[%d].read", i); |
6fd5ea63 HL |
684 | if (!gigaset_initbcs(cs->bcs + i, cs, i)) |
685 | goto error; | |
686 | } | |
687 | ||
688 | ++cs->cs_init; | |
689 | ||
784d5858 | 690 | gig_dbg(DEBUG_INIT, "setting up at_state"); |
6fd5ea63 HL |
691 | spin_lock_init(&cs->lock); |
692 | gigaset_at_init(&cs->at_state, NULL, cs, 0); | |
693 | cs->dle = 0; | |
694 | cs->cbytes = 0; | |
695 | ||
784d5858 | 696 | gig_dbg(DEBUG_INIT, "setting up inbuf"); |
6fd5ea63 HL |
697 | if (onechannel) { //FIXME distinction necessary? |
698 | gigaset_inbuf_init(cs->inbuf, cs->bcs, cs, INS_command); | |
699 | } else | |
700 | gigaset_inbuf_init(cs->inbuf, NULL, cs, INS_command); | |
701 | ||
702 | atomic_set(&cs->connected, 0); | |
703 | ||
784d5858 | 704 | gig_dbg(DEBUG_INIT, "setting up cmdbuf"); |
6fd5ea63 HL |
705 | cs->cmdbuf = cs->lastcmdbuf = NULL; |
706 | spin_lock_init(&cs->cmdlock); | |
707 | cs->curlen = 0; | |
708 | cs->cmdbytes = 0; | |
709 | ||
784d5858 | 710 | gig_dbg(DEBUG_INIT, "setting up iif"); |
6fd5ea63 | 711 | if (!gigaset_register_to_LL(cs, modulename)) { |
784d5858 | 712 | err("register_isdn failed"); |
6fd5ea63 HL |
713 | goto error; |
714 | } | |
715 | ||
716 | make_valid(cs, VALID_ID); | |
717 | ++cs->cs_init; | |
784d5858 | 718 | gig_dbg(DEBUG_INIT, "setting up hw"); |
6fd5ea63 HL |
719 | if (!cs->ops->initcshw(cs)) |
720 | goto error; | |
721 | ||
722 | ++cs->cs_init; | |
723 | ||
724 | gigaset_if_init(cs); | |
725 | ||
726 | atomic_set(&cs->running, 1); | |
ec81b5e6 TS |
727 | setup_timer(&cs->timer, timer_tick, (unsigned long) cs); |
728 | cs->timer.expires = jiffies + msecs_to_jiffies(GIG_TICK); | |
6fd5ea63 HL |
729 | /* FIXME: can jiffies increase too much until the timer is added? |
730 | * Same problem(?) with mod_timer() in timer_tick(). */ | |
731 | add_timer(&cs->timer); | |
732 | ||
784d5858 | 733 | gig_dbg(DEBUG_INIT, "cs initialized"); |
abfd1dc7 | 734 | mutex_unlock(&cs->mutex); |
6fd5ea63 HL |
735 | return cs; |
736 | ||
737 | error: if (cs) | |
abfd1dc7 | 738 | mutex_unlock(&cs->mutex); |
784d5858 | 739 | gig_dbg(DEBUG_INIT, "failed"); |
6fd5ea63 HL |
740 | gigaset_freecs(cs); |
741 | return NULL; | |
742 | } | |
743 | EXPORT_SYMBOL_GPL(gigaset_initcs); | |
744 | ||
917f5085 TS |
745 | /* ReInitialize the b-channel structure */ |
746 | /* e.g. called on hangup, disconnect */ | |
6fd5ea63 HL |
747 | void gigaset_bcs_reinit(struct bc_state *bcs) |
748 | { | |
749 | struct sk_buff *skb; | |
750 | struct cardstate *cs = bcs->cs; | |
751 | unsigned long flags; | |
752 | ||
753 | while ((skb = skb_dequeue(&bcs->squeue)) != NULL) | |
754 | dev_kfree_skb(skb); | |
755 | ||
917f5085 | 756 | spin_lock_irqsave(&cs->lock, flags); |
6fd5ea63 HL |
757 | clear_at_state(&bcs->at_state); |
758 | bcs->at_state.ConState = 0; | |
759 | bcs->at_state.timer_active = 0; | |
760 | bcs->at_state.timer_expires = 0; | |
784d5858 | 761 | bcs->at_state.cid = -1; /* No CID defined */ |
6fd5ea63 HL |
762 | spin_unlock_irqrestore(&cs->lock, flags); |
763 | ||
764 | bcs->inputstate = 0; | |
765 | ||
766 | #ifdef CONFIG_GIGASET_DEBUG | |
767 | bcs->emptycount = 0; | |
768 | #endif | |
769 | ||
770 | bcs->fcs = PPP_INITFCS; | |
771 | bcs->chstate = 0; | |
772 | ||
773 | bcs->ignore = cs->ignoreframes; | |
774 | if (bcs->ignore) | |
775 | bcs->inputstate |= INS_skip_frame; | |
776 | ||
777 | ||
778 | cs->ops->reinitbcshw(bcs); | |
779 | } | |
780 | ||
781 | static void cleanup_cs(struct cardstate *cs) | |
782 | { | |
783 | struct cmdbuf_t *cb, *tcb; | |
784 | int i; | |
785 | unsigned long flags; | |
786 | ||
787 | spin_lock_irqsave(&cs->lock, flags); | |
788 | ||
789 | atomic_set(&cs->mode, M_UNKNOWN); | |
790 | atomic_set(&cs->mstate, MS_UNINITIALIZED); | |
791 | ||
792 | clear_at_state(&cs->at_state); | |
793 | dealloc_at_states(cs); | |
794 | free_strings(&cs->at_state); | |
795 | gigaset_at_init(&cs->at_state, NULL, cs, 0); | |
796 | ||
797 | kfree(cs->inbuf->rcvbuf); | |
798 | cs->inbuf->rcvbuf = NULL; | |
799 | cs->inbuf->inputstate = INS_command; | |
800 | atomic_set(&cs->inbuf->head, 0); | |
801 | atomic_set(&cs->inbuf->tail, 0); | |
802 | ||
803 | cb = cs->cmdbuf; | |
804 | while (cb) { | |
805 | tcb = cb; | |
806 | cb = cb->next; | |
807 | kfree(tcb); | |
808 | } | |
809 | cs->cmdbuf = cs->lastcmdbuf = NULL; | |
810 | cs->curlen = 0; | |
811 | cs->cmdbytes = 0; | |
812 | cs->gotfwver = -1; | |
813 | cs->dle = 0; | |
814 | cs->cur_at_seq = 0; | |
815 | atomic_set(&cs->commands_pending, 0); | |
816 | cs->cbytes = 0; | |
817 | ||
818 | spin_unlock_irqrestore(&cs->lock, flags); | |
819 | ||
820 | for (i = 0; i < cs->channels; ++i) { | |
821 | gigaset_freebcs(cs->bcs + i); | |
822 | if (!gigaset_initbcs(cs->bcs + i, cs, i)) | |
823 | break; //FIXME error handling | |
824 | } | |
825 | ||
826 | if (cs->waiting) { | |
827 | cs->cmd_result = -ENODEV; | |
828 | cs->waiting = 0; | |
829 | wake_up_interruptible(&cs->waitqueue); | |
830 | } | |
831 | } | |
832 | ||
833 | ||
834 | int gigaset_start(struct cardstate *cs) | |
835 | { | |
abfd1dc7 | 836 | if (mutex_lock_interruptible(&cs->mutex)) |
6fd5ea63 | 837 | return 0; |
6fd5ea63 HL |
838 | |
839 | atomic_set(&cs->connected, 1); | |
840 | ||
841 | if (atomic_read(&cs->mstate) != MS_LOCKED) { | |
842 | cs->ops->set_modem_ctrl(cs, 0, TIOCM_DTR|TIOCM_RTS); | |
843 | cs->ops->baud_rate(cs, B115200); | |
844 | cs->ops->set_line_ctrl(cs, CS8); | |
845 | cs->control_state = TIOCM_DTR|TIOCM_RTS; | |
846 | } else { | |
847 | //FIXME use some saved values? | |
848 | } | |
849 | ||
850 | cs->waiting = 1; | |
851 | ||
852 | if (!gigaset_add_event(cs, &cs->at_state, EV_START, NULL, 0, NULL)) { | |
853 | cs->waiting = 0; | |
854 | //FIXME what should we do? | |
855 | goto error; | |
856 | } | |
857 | ||
784d5858 | 858 | gig_dbg(DEBUG_CMD, "scheduling START"); |
6fd5ea63 HL |
859 | gigaset_schedule_event(cs); |
860 | ||
861 | wait_event(cs->waitqueue, !cs->waiting); | |
862 | ||
b1d47464 TS |
863 | /* set up device sysfs */ |
864 | gigaset_init_dev_sysfs(cs); | |
865 | ||
abfd1dc7 | 866 | mutex_unlock(&cs->mutex); |
6fd5ea63 HL |
867 | return 1; |
868 | ||
869 | error: | |
abfd1dc7 | 870 | mutex_unlock(&cs->mutex); |
6fd5ea63 HL |
871 | return 0; |
872 | } | |
873 | EXPORT_SYMBOL_GPL(gigaset_start); | |
874 | ||
875 | void gigaset_shutdown(struct cardstate *cs) | |
876 | { | |
abfd1dc7 | 877 | mutex_lock(&cs->mutex); |
6fd5ea63 HL |
878 | |
879 | cs->waiting = 1; | |
880 | ||
881 | if (!gigaset_add_event(cs, &cs->at_state, EV_SHUTDOWN, NULL, 0, NULL)) { | |
882 | //FIXME what should we do? | |
883 | goto exit; | |
884 | } | |
885 | ||
784d5858 | 886 | gig_dbg(DEBUG_CMD, "scheduling SHUTDOWN"); |
6fd5ea63 HL |
887 | gigaset_schedule_event(cs); |
888 | ||
889 | if (wait_event_interruptible(cs->waitqueue, !cs->waiting)) { | |
784d5858 | 890 | warn("%s: aborted", __func__); |
6fd5ea63 HL |
891 | //FIXME |
892 | } | |
893 | ||
894 | if (atomic_read(&cs->mstate) != MS_LOCKED) { | |
895 | //FIXME? | |
896 | //gigaset_baud_rate(cs, B115200); | |
897 | //gigaset_set_line_ctrl(cs, CS8); | |
898 | //gigaset_set_modem_ctrl(cs, TIOCM_DTR|TIOCM_RTS, 0); | |
899 | //cs->control_state = 0; | |
900 | } else { | |
901 | //FIXME use some saved values? | |
902 | } | |
903 | ||
904 | cleanup_cs(cs); | |
905 | ||
906 | exit: | |
abfd1dc7 | 907 | mutex_unlock(&cs->mutex); |
6fd5ea63 HL |
908 | } |
909 | EXPORT_SYMBOL_GPL(gigaset_shutdown); | |
910 | ||
911 | void gigaset_stop(struct cardstate *cs) | |
912 | { | |
abfd1dc7 | 913 | mutex_lock(&cs->mutex); |
6fd5ea63 | 914 | |
b1d47464 TS |
915 | /* clear device sysfs */ |
916 | gigaset_free_dev_sysfs(cs); | |
917 | ||
6fd5ea63 HL |
918 | atomic_set(&cs->connected, 0); |
919 | ||
920 | cs->waiting = 1; | |
921 | ||
922 | if (!gigaset_add_event(cs, &cs->at_state, EV_STOP, NULL, 0, NULL)) { | |
923 | //FIXME what should we do? | |
924 | goto exit; | |
925 | } | |
926 | ||
784d5858 | 927 | gig_dbg(DEBUG_CMD, "scheduling STOP"); |
6fd5ea63 HL |
928 | gigaset_schedule_event(cs); |
929 | ||
930 | if (wait_event_interruptible(cs->waitqueue, !cs->waiting)) { | |
784d5858 | 931 | warn("%s: aborted", __func__); |
6fd5ea63 HL |
932 | //FIXME |
933 | } | |
934 | ||
935 | /* Tell the LL that the device is not available .. */ | |
936 | gigaset_i4l_cmd(cs, ISDN_STAT_STOP); // FIXME move to event layer? | |
937 | ||
938 | cleanup_cs(cs); | |
939 | ||
940 | exit: | |
abfd1dc7 | 941 | mutex_unlock(&cs->mutex); |
6fd5ea63 HL |
942 | } |
943 | EXPORT_SYMBOL_GPL(gigaset_stop); | |
944 | ||
945 | static LIST_HEAD(drivers); | |
946 | static spinlock_t driver_lock = SPIN_LOCK_UNLOCKED; | |
947 | ||
948 | struct cardstate *gigaset_get_cs_by_id(int id) | |
949 | { | |
950 | unsigned long flags; | |
951 | static struct cardstate *ret = NULL; | |
952 | static struct cardstate *cs; | |
953 | struct gigaset_driver *drv; | |
954 | unsigned i; | |
955 | ||
956 | spin_lock_irqsave(&driver_lock, flags); | |
957 | list_for_each_entry(drv, &drivers, list) { | |
958 | spin_lock(&drv->lock); | |
959 | for (i = 0; i < drv->minors; ++i) { | |
960 | if (drv->flags[i] & VALID_ID) { | |
961 | cs = drv->cs + i; | |
962 | if (cs->myid == id) | |
963 | ret = cs; | |
964 | } | |
965 | if (ret) | |
966 | break; | |
967 | } | |
968 | spin_unlock(&drv->lock); | |
969 | if (ret) | |
970 | break; | |
971 | } | |
972 | spin_unlock_irqrestore(&driver_lock, flags); | |
973 | return ret; | |
974 | } | |
975 | ||
976 | void gigaset_debugdrivers(void) | |
977 | { | |
978 | unsigned long flags; | |
979 | static struct cardstate *cs; | |
980 | struct gigaset_driver *drv; | |
981 | unsigned i; | |
982 | ||
983 | spin_lock_irqsave(&driver_lock, flags); | |
984 | list_for_each_entry(drv, &drivers, list) { | |
784d5858 | 985 | gig_dbg(DEBUG_DRIVER, "driver %p", drv); |
6fd5ea63 HL |
986 | spin_lock(&drv->lock); |
987 | for (i = 0; i < drv->minors; ++i) { | |
784d5858 TS |
988 | gig_dbg(DEBUG_DRIVER, " index %u", i); |
989 | gig_dbg(DEBUG_DRIVER, " flags 0x%02x", | |
990 | drv->flags[i]); | |
6fd5ea63 | 991 | cs = drv->cs + i; |
784d5858 TS |
992 | gig_dbg(DEBUG_DRIVER, " cardstate %p", cs); |
993 | gig_dbg(DEBUG_DRIVER, " minor_index %u", | |
994 | cs->minor_index); | |
995 | gig_dbg(DEBUG_DRIVER, " driver %p", cs->driver); | |
996 | gig_dbg(DEBUG_DRIVER, " i4l id %d", cs->myid); | |
6fd5ea63 HL |
997 | } |
998 | spin_unlock(&drv->lock); | |
999 | } | |
1000 | spin_unlock_irqrestore(&driver_lock, flags); | |
1001 | } | |
1002 | EXPORT_SYMBOL_GPL(gigaset_debugdrivers); | |
1003 | ||
1004 | struct cardstate *gigaset_get_cs_by_tty(struct tty_struct *tty) | |
1005 | { | |
1006 | if (tty->index < 0 || tty->index >= tty->driver->num) | |
1007 | return NULL; | |
1008 | return gigaset_get_cs_by_minor(tty->index + tty->driver->minor_start); | |
1009 | } | |
1010 | ||
1011 | struct cardstate *gigaset_get_cs_by_minor(unsigned minor) | |
1012 | { | |
1013 | unsigned long flags; | |
1014 | static struct cardstate *ret = NULL; | |
1015 | struct gigaset_driver *drv; | |
1016 | unsigned index; | |
1017 | ||
1018 | spin_lock_irqsave(&driver_lock, flags); | |
1019 | list_for_each_entry(drv, &drivers, list) { | |
1020 | if (minor < drv->minor || minor >= drv->minor + drv->minors) | |
1021 | continue; | |
1022 | index = minor - drv->minor; | |
1023 | spin_lock(&drv->lock); | |
1024 | if (drv->flags[index] & VALID_MINOR) | |
1025 | ret = drv->cs + index; | |
1026 | spin_unlock(&drv->lock); | |
1027 | if (ret) | |
1028 | break; | |
1029 | } | |
1030 | spin_unlock_irqrestore(&driver_lock, flags); | |
1031 | return ret; | |
1032 | } | |
1033 | ||
1034 | void gigaset_freedriver(struct gigaset_driver *drv) | |
1035 | { | |
1036 | unsigned long flags; | |
1037 | ||
1038 | spin_lock_irqsave(&driver_lock, flags); | |
1039 | list_del(&drv->list); | |
1040 | spin_unlock_irqrestore(&driver_lock, flags); | |
1041 | ||
1042 | gigaset_if_freedriver(drv); | |
1043 | module_put(drv->owner); | |
1044 | ||
1045 | kfree(drv->cs); | |
1046 | kfree(drv->flags); | |
1047 | kfree(drv); | |
1048 | } | |
1049 | EXPORT_SYMBOL_GPL(gigaset_freedriver); | |
1050 | ||
1051 | /* gigaset_initdriver | |
1052 | * Allocate and initialize gigaset_driver structure. Initialize interface. | |
1053 | * parameters: | |
784d5858 TS |
1054 | * minor First minor number |
1055 | * minors Number of minors this driver can handle | |
1056 | * procname Name of the driver | |
1057 | * devname Name of the device files (prefix without minor number) | |
1058 | * devfsname Devfs name of the device files without %d | |
6fd5ea63 | 1059 | * return value: |
784d5858 | 1060 | * Pointer to the gigaset_driver structure on success, NULL on failure. |
6fd5ea63 HL |
1061 | */ |
1062 | struct gigaset_driver *gigaset_initdriver(unsigned minor, unsigned minors, | |
784d5858 TS |
1063 | const char *procname, |
1064 | const char *devname, | |
1065 | const char *devfsname, | |
1066 | const struct gigaset_ops *ops, | |
1067 | struct module *owner) | |
6fd5ea63 HL |
1068 | { |
1069 | struct gigaset_driver *drv; | |
1070 | unsigned long flags; | |
1071 | unsigned i; | |
1072 | ||
1073 | drv = kmalloc(sizeof *drv, GFP_KERNEL); | |
1074 | if (!drv) | |
1075 | return NULL; | |
1076 | if (!try_module_get(owner)) | |
1077 | return NULL; | |
1078 | ||
1079 | drv->cs = NULL; | |
1080 | drv->have_tty = 0; | |
1081 | drv->minor = minor; | |
1082 | drv->minors = minors; | |
1083 | spin_lock_init(&drv->lock); | |
1084 | drv->blocked = 0; | |
1085 | drv->ops = ops; | |
1086 | drv->owner = owner; | |
1087 | INIT_LIST_HEAD(&drv->list); | |
1088 | ||
1089 | drv->cs = kmalloc(minors * sizeof *drv->cs, GFP_KERNEL); | |
1090 | if (!drv->cs) | |
1091 | goto out1; | |
1092 | drv->flags = kmalloc(minors * sizeof *drv->flags, GFP_KERNEL); | |
1093 | if (!drv->flags) | |
1094 | goto out2; | |
1095 | ||
1096 | for (i = 0; i < minors; ++i) { | |
1097 | drv->flags[i] = 0; | |
1098 | drv->cs[i].driver = drv; | |
1099 | drv->cs[i].ops = drv->ops; | |
1100 | drv->cs[i].minor_index = i; | |
1101 | } | |
1102 | ||
1103 | gigaset_if_initdriver(drv, procname, devname, devfsname); | |
1104 | ||
1105 | spin_lock_irqsave(&driver_lock, flags); | |
1106 | list_add(&drv->list, &drivers); | |
1107 | spin_unlock_irqrestore(&driver_lock, flags); | |
1108 | ||
1109 | return drv; | |
1110 | ||
1111 | out2: | |
1112 | kfree(drv->cs); | |
1113 | out1: | |
1114 | kfree(drv); | |
1115 | module_put(owner); | |
1116 | return NULL; | |
1117 | } | |
1118 | EXPORT_SYMBOL_GPL(gigaset_initdriver); | |
1119 | ||
1120 | static struct cardstate *alloc_cs(struct gigaset_driver *drv) | |
1121 | { | |
1122 | unsigned long flags; | |
1123 | unsigned i; | |
1124 | static struct cardstate *ret = NULL; | |
1125 | ||
1126 | spin_lock_irqsave(&drv->lock, flags); | |
1127 | for (i = 0; i < drv->minors; ++i) { | |
1128 | if (!(drv->flags[i] & VALID_MINOR)) { | |
1129 | drv->flags[i] = VALID_MINOR; | |
1130 | ret = drv->cs + i; | |
1131 | } | |
1132 | if (ret) | |
1133 | break; | |
1134 | } | |
1135 | spin_unlock_irqrestore(&drv->lock, flags); | |
1136 | return ret; | |
1137 | } | |
1138 | ||
1139 | static void free_cs(struct cardstate *cs) | |
1140 | { | |
1141 | unsigned long flags; | |
1142 | struct gigaset_driver *drv = cs->driver; | |
1143 | spin_lock_irqsave(&drv->lock, flags); | |
1144 | drv->flags[cs->minor_index] = 0; | |
1145 | spin_unlock_irqrestore(&drv->lock, flags); | |
1146 | } | |
1147 | ||
1148 | static void make_valid(struct cardstate *cs, unsigned mask) | |
1149 | { | |
1150 | unsigned long flags; | |
1151 | struct gigaset_driver *drv = cs->driver; | |
1152 | spin_lock_irqsave(&drv->lock, flags); | |
1153 | drv->flags[cs->minor_index] |= mask; | |
1154 | spin_unlock_irqrestore(&drv->lock, flags); | |
1155 | } | |
1156 | ||
1157 | static void make_invalid(struct cardstate *cs, unsigned mask) | |
1158 | { | |
1159 | unsigned long flags; | |
1160 | struct gigaset_driver *drv = cs->driver; | |
1161 | spin_lock_irqsave(&drv->lock, flags); | |
1162 | drv->flags[cs->minor_index] &= ~mask; | |
1163 | spin_unlock_irqrestore(&drv->lock, flags); | |
1164 | } | |
1165 | ||
1166 | /* For drivers without fixed assignment device<->cardstate (usb) */ | |
1167 | struct cardstate *gigaset_getunassignedcs(struct gigaset_driver *drv) | |
1168 | { | |
1169 | unsigned long flags; | |
1170 | struct cardstate *cs = NULL; | |
1171 | unsigned i; | |
1172 | ||
1173 | spin_lock_irqsave(&drv->lock, flags); | |
1174 | if (drv->blocked) | |
1175 | goto exit; | |
1176 | for (i = 0; i < drv->minors; ++i) { | |
1177 | if ((drv->flags[i] & VALID_MINOR) && | |
1178 | !(drv->flags[i] & ASSIGNED)) { | |
1179 | drv->flags[i] |= ASSIGNED; | |
1180 | cs = drv->cs + i; | |
1181 | break; | |
1182 | } | |
1183 | } | |
1184 | exit: | |
1185 | spin_unlock_irqrestore(&drv->lock, flags); | |
1186 | return cs; | |
1187 | } | |
1188 | EXPORT_SYMBOL_GPL(gigaset_getunassignedcs); | |
1189 | ||
1190 | void gigaset_unassign(struct cardstate *cs) | |
1191 | { | |
1192 | unsigned long flags; | |
1193 | unsigned *minor_flags; | |
1194 | struct gigaset_driver *drv; | |
1195 | ||
1196 | if (!cs) | |
1197 | return; | |
1198 | drv = cs->driver; | |
1199 | spin_lock_irqsave(&drv->lock, flags); | |
1200 | minor_flags = drv->flags + cs->minor_index; | |
1201 | if (*minor_flags & VALID_MINOR) | |
1202 | *minor_flags &= ~ASSIGNED; | |
1203 | spin_unlock_irqrestore(&drv->lock, flags); | |
1204 | } | |
1205 | EXPORT_SYMBOL_GPL(gigaset_unassign); | |
1206 | ||
1207 | void gigaset_blockdriver(struct gigaset_driver *drv) | |
1208 | { | |
1209 | unsigned long flags; | |
1210 | spin_lock_irqsave(&drv->lock, flags); | |
1211 | drv->blocked = 1; | |
1212 | spin_unlock_irqrestore(&drv->lock, flags); | |
1213 | } | |
1214 | EXPORT_SYMBOL_GPL(gigaset_blockdriver); | |
1215 | ||
1216 | static int __init gigaset_init_module(void) | |
1217 | { | |
1218 | /* in accordance with the principle of least astonishment, | |
1219 | * setting the 'debug' parameter to 1 activates a sensible | |
1220 | * set of default debug levels | |
1221 | */ | |
1222 | if (gigaset_debuglevel == 1) | |
1223 | gigaset_debuglevel = DEBUG_DEFAULT; | |
1224 | ||
1225 | info(DRIVER_AUTHOR); | |
1226 | info(DRIVER_DESC); | |
1227 | return 0; | |
1228 | } | |
1229 | ||
1230 | static void __exit gigaset_exit_module(void) | |
1231 | { | |
1232 | } | |
1233 | ||
1234 | module_init(gigaset_init_module); | |
1235 | module_exit(gigaset_exit_module); | |
1236 | ||
1237 | MODULE_AUTHOR(DRIVER_AUTHOR); | |
1238 | MODULE_DESCRIPTION(DRIVER_DESC); | |
1239 | ||
1240 | MODULE_LICENSE("GPL"); |