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Commit | Line | Data |
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6fd5ea63 HL |
1 | /* |
2 | * Stuff used by all variants of the driver | |
3 | * | |
70440cf2 | 4 | * Copyright (c) 2001 by Stefan Eilers, |
6fd5ea63 HL |
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 */ | |
70440cf2 | 22 | #define DRIVER_AUTHOR "Hansjoerg Lipp <hjlipp@web.de>, Tilman Schmidt <tilman@imap.cc>, Stefan Eilers" |
6fd5ea63 HL |
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 | ||
70440cf2 | 31 | /* driver state flags */ |
784d5858 TS |
32 | #define VALID_MINOR 0x01 |
33 | #define VALID_ID 0x02 | |
34 | #define ASSIGNED 0x04 | |
6fd5ea63 HL |
35 | |
36 | /* bitwise byte inversion table */ | |
37 | __u8 gigaset_invtab[256] = { | |
38 | 0x00, 0x80, 0x40, 0xc0, 0x20, 0xa0, 0x60, 0xe0, | |
39 | 0x10, 0x90, 0x50, 0xd0, 0x30, 0xb0, 0x70, 0xf0, | |
40 | 0x08, 0x88, 0x48, 0xc8, 0x28, 0xa8, 0x68, 0xe8, | |
41 | 0x18, 0x98, 0x58, 0xd8, 0x38, 0xb8, 0x78, 0xf8, | |
42 | 0x04, 0x84, 0x44, 0xc4, 0x24, 0xa4, 0x64, 0xe4, | |
43 | 0x14, 0x94, 0x54, 0xd4, 0x34, 0xb4, 0x74, 0xf4, | |
44 | 0x0c, 0x8c, 0x4c, 0xcc, 0x2c, 0xac, 0x6c, 0xec, | |
45 | 0x1c, 0x9c, 0x5c, 0xdc, 0x3c, 0xbc, 0x7c, 0xfc, | |
46 | 0x02, 0x82, 0x42, 0xc2, 0x22, 0xa2, 0x62, 0xe2, | |
47 | 0x12, 0x92, 0x52, 0xd2, 0x32, 0xb2, 0x72, 0xf2, | |
48 | 0x0a, 0x8a, 0x4a, 0xca, 0x2a, 0xaa, 0x6a, 0xea, | |
49 | 0x1a, 0x9a, 0x5a, 0xda, 0x3a, 0xba, 0x7a, 0xfa, | |
50 | 0x06, 0x86, 0x46, 0xc6, 0x26, 0xa6, 0x66, 0xe6, | |
51 | 0x16, 0x96, 0x56, 0xd6, 0x36, 0xb6, 0x76, 0xf6, | |
52 | 0x0e, 0x8e, 0x4e, 0xce, 0x2e, 0xae, 0x6e, 0xee, | |
53 | 0x1e, 0x9e, 0x5e, 0xde, 0x3e, 0xbe, 0x7e, 0xfe, | |
54 | 0x01, 0x81, 0x41, 0xc1, 0x21, 0xa1, 0x61, 0xe1, | |
55 | 0x11, 0x91, 0x51, 0xd1, 0x31, 0xb1, 0x71, 0xf1, | |
56 | 0x09, 0x89, 0x49, 0xc9, 0x29, 0xa9, 0x69, 0xe9, | |
57 | 0x19, 0x99, 0x59, 0xd9, 0x39, 0xb9, 0x79, 0xf9, | |
58 | 0x05, 0x85, 0x45, 0xc5, 0x25, 0xa5, 0x65, 0xe5, | |
59 | 0x15, 0x95, 0x55, 0xd5, 0x35, 0xb5, 0x75, 0xf5, | |
60 | 0x0d, 0x8d, 0x4d, 0xcd, 0x2d, 0xad, 0x6d, 0xed, | |
61 | 0x1d, 0x9d, 0x5d, 0xdd, 0x3d, 0xbd, 0x7d, 0xfd, | |
62 | 0x03, 0x83, 0x43, 0xc3, 0x23, 0xa3, 0x63, 0xe3, | |
63 | 0x13, 0x93, 0x53, 0xd3, 0x33, 0xb3, 0x73, 0xf3, | |
64 | 0x0b, 0x8b, 0x4b, 0xcb, 0x2b, 0xab, 0x6b, 0xeb, | |
65 | 0x1b, 0x9b, 0x5b, 0xdb, 0x3b, 0xbb, 0x7b, 0xfb, | |
66 | 0x07, 0x87, 0x47, 0xc7, 0x27, 0xa7, 0x67, 0xe7, | |
67 | 0x17, 0x97, 0x57, 0xd7, 0x37, 0xb7, 0x77, 0xf7, | |
68 | 0x0f, 0x8f, 0x4f, 0xcf, 0x2f, 0xaf, 0x6f, 0xef, | |
69 | 0x1f, 0x9f, 0x5f, 0xdf, 0x3f, 0xbf, 0x7f, 0xff | |
70 | }; | |
71 | EXPORT_SYMBOL_GPL(gigaset_invtab); | |
72 | ||
73 | void gigaset_dbg_buffer(enum debuglevel level, const unsigned char *msg, | |
01371500 | 74 | size_t len, const unsigned char *buf) |
6fd5ea63 HL |
75 | { |
76 | unsigned char outbuf[80]; | |
784d5858 | 77 | unsigned char c; |
6fd5ea63 HL |
78 | size_t space = sizeof outbuf - 1; |
79 | unsigned char *out = outbuf; | |
01371500 | 80 | size_t numin = len; |
6fd5ea63 | 81 | |
01371500 | 82 | while (numin--) { |
784d5858 TS |
83 | c = *buf++; |
84 | if (c == '~' || c == '^' || c == '\\') { | |
01371500 | 85 | if (!space--) |
784d5858 TS |
86 | break; |
87 | *out++ = '\\'; | |
88 | } | |
89 | if (c & 0x80) { | |
01371500 | 90 | if (!space--) |
784d5858 TS |
91 | break; |
92 | *out++ = '~'; | |
93 | c ^= 0x80; | |
94 | } | |
95 | if (c < 0x20 || c == 0x7f) { | |
01371500 | 96 | if (!space--) |
784d5858 | 97 | break; |
6fd5ea63 | 98 | *out++ = '^'; |
784d5858 | 99 | c ^= 0x40; |
6fd5ea63 | 100 | } |
01371500 | 101 | if (!space--) |
784d5858 TS |
102 | break; |
103 | *out++ = c; | |
6fd5ea63 HL |
104 | } |
105 | *out = 0; | |
106 | ||
784d5858 | 107 | gig_dbg(level, "%s (%u bytes): %s", msg, (unsigned) len, outbuf); |
6fd5ea63 HL |
108 | } |
109 | EXPORT_SYMBOL_GPL(gigaset_dbg_buffer); | |
110 | ||
111 | static int setflags(struct cardstate *cs, unsigned flags, unsigned delay) | |
112 | { | |
113 | int r; | |
114 | ||
115 | r = cs->ops->set_modem_ctrl(cs, cs->control_state, flags); | |
116 | cs->control_state = flags; | |
117 | if (r < 0) | |
118 | return r; | |
119 | ||
120 | if (delay) { | |
121 | set_current_state(TASK_INTERRUPTIBLE); | |
122 | schedule_timeout(delay * HZ / 1000); | |
123 | } | |
124 | ||
125 | return 0; | |
126 | } | |
127 | ||
128 | int gigaset_enterconfigmode(struct cardstate *cs) | |
129 | { | |
130 | int i, r; | |
131 | ||
6fd5ea63 HL |
132 | cs->control_state = TIOCM_RTS; //FIXME |
133 | ||
134 | r = setflags(cs, TIOCM_DTR, 200); | |
135 | if (r < 0) | |
136 | goto error; | |
137 | r = setflags(cs, 0, 200); | |
138 | if (r < 0) | |
139 | goto error; | |
140 | for (i = 0; i < 5; ++i) { | |
141 | r = setflags(cs, TIOCM_RTS, 100); | |
142 | if (r < 0) | |
143 | goto error; | |
144 | r = setflags(cs, 0, 100); | |
145 | if (r < 0) | |
146 | goto error; | |
147 | } | |
148 | r = setflags(cs, TIOCM_RTS|TIOCM_DTR, 800); | |
149 | if (r < 0) | |
150 | goto error; | |
151 | ||
152 | return 0; | |
153 | ||
154 | error: | |
784d5858 | 155 | dev_err(cs->dev, "error %d on setuartbits\n", -r); |
6fd5ea63 HL |
156 | cs->control_state = TIOCM_RTS|TIOCM_DTR; // FIXME is this a good value? |
157 | cs->ops->set_modem_ctrl(cs, 0, TIOCM_RTS|TIOCM_DTR); | |
158 | ||
159 | return -1; //r | |
160 | } | |
161 | ||
162 | static int test_timeout(struct at_state_t *at_state) | |
163 | { | |
164 | if (!at_state->timer_expires) | |
165 | return 0; | |
166 | ||
167 | if (--at_state->timer_expires) { | |
784d5858 TS |
168 | gig_dbg(DEBUG_MCMD, "decreased timer of %p to %lu", |
169 | at_state, at_state->timer_expires); | |
6fd5ea63 HL |
170 | return 0; |
171 | } | |
172 | ||
173 | if (!gigaset_add_event(at_state->cs, at_state, EV_TIMEOUT, NULL, | |
69049cc8 | 174 | at_state->timer_index, NULL)) { |
6fd5ea63 HL |
175 | //FIXME what should we do? |
176 | } | |
177 | ||
178 | return 1; | |
179 | } | |
180 | ||
181 | static void timer_tick(unsigned long data) | |
182 | { | |
183 | struct cardstate *cs = (struct cardstate *) data; | |
184 | unsigned long flags; | |
185 | unsigned channel; | |
186 | struct at_state_t *at_state; | |
187 | int timeout = 0; | |
188 | ||
189 | spin_lock_irqsave(&cs->lock, flags); | |
190 | ||
191 | for (channel = 0; channel < cs->channels; ++channel) | |
192 | if (test_timeout(&cs->bcs[channel].at_state)) | |
193 | timeout = 1; | |
194 | ||
195 | if (test_timeout(&cs->at_state)) | |
196 | timeout = 1; | |
197 | ||
198 | list_for_each_entry(at_state, &cs->temp_at_states, list) | |
199 | if (test_timeout(at_state)) | |
200 | timeout = 1; | |
201 | ||
69049cc8 | 202 | if (cs->running) { |
ec81b5e6 | 203 | mod_timer(&cs->timer, jiffies + msecs_to_jiffies(GIG_TICK)); |
6fd5ea63 | 204 | if (timeout) { |
784d5858 | 205 | gig_dbg(DEBUG_CMD, "scheduling timeout"); |
6fd5ea63 HL |
206 | tasklet_schedule(&cs->event_tasklet); |
207 | } | |
208 | } | |
209 | ||
210 | spin_unlock_irqrestore(&cs->lock, flags); | |
211 | } | |
212 | ||
213 | int gigaset_get_channel(struct bc_state *bcs) | |
214 | { | |
215 | unsigned long flags; | |
216 | ||
217 | spin_lock_irqsave(&bcs->cs->lock, flags); | |
218 | if (bcs->use_count) { | |
784d5858 TS |
219 | gig_dbg(DEBUG_ANY, "could not allocate channel %d", |
220 | bcs->channel); | |
6fd5ea63 HL |
221 | spin_unlock_irqrestore(&bcs->cs->lock, flags); |
222 | return 0; | |
223 | } | |
224 | ++bcs->use_count; | |
225 | bcs->busy = 1; | |
784d5858 | 226 | gig_dbg(DEBUG_ANY, "allocated channel %d", bcs->channel); |
6fd5ea63 HL |
227 | spin_unlock_irqrestore(&bcs->cs->lock, flags); |
228 | return 1; | |
229 | } | |
230 | ||
231 | void gigaset_free_channel(struct bc_state *bcs) | |
232 | { | |
233 | unsigned long flags; | |
234 | ||
235 | spin_lock_irqsave(&bcs->cs->lock, flags); | |
236 | if (!bcs->busy) { | |
784d5858 | 237 | gig_dbg(DEBUG_ANY, "could not free channel %d", bcs->channel); |
6fd5ea63 HL |
238 | spin_unlock_irqrestore(&bcs->cs->lock, flags); |
239 | return; | |
240 | } | |
241 | --bcs->use_count; | |
242 | bcs->busy = 0; | |
784d5858 | 243 | gig_dbg(DEBUG_ANY, "freed channel %d", bcs->channel); |
6fd5ea63 HL |
244 | spin_unlock_irqrestore(&bcs->cs->lock, flags); |
245 | } | |
246 | ||
247 | int gigaset_get_channels(struct cardstate *cs) | |
248 | { | |
249 | unsigned long flags; | |
250 | int i; | |
251 | ||
252 | spin_lock_irqsave(&cs->lock, flags); | |
253 | for (i = 0; i < cs->channels; ++i) | |
254 | if (cs->bcs[i].use_count) { | |
255 | spin_unlock_irqrestore(&cs->lock, flags); | |
784d5858 | 256 | gig_dbg(DEBUG_ANY, "could not allocate all channels"); |
6fd5ea63 HL |
257 | return 0; |
258 | } | |
259 | for (i = 0; i < cs->channels; ++i) | |
260 | ++cs->bcs[i].use_count; | |
261 | spin_unlock_irqrestore(&cs->lock, flags); | |
262 | ||
784d5858 | 263 | gig_dbg(DEBUG_ANY, "allocated all channels"); |
6fd5ea63 HL |
264 | |
265 | return 1; | |
266 | } | |
267 | ||
268 | void gigaset_free_channels(struct cardstate *cs) | |
269 | { | |
270 | unsigned long flags; | |
271 | int i; | |
272 | ||
784d5858 | 273 | gig_dbg(DEBUG_ANY, "unblocking all channels"); |
6fd5ea63 HL |
274 | spin_lock_irqsave(&cs->lock, flags); |
275 | for (i = 0; i < cs->channels; ++i) | |
276 | --cs->bcs[i].use_count; | |
277 | spin_unlock_irqrestore(&cs->lock, flags); | |
278 | } | |
279 | ||
280 | void gigaset_block_channels(struct cardstate *cs) | |
281 | { | |
282 | unsigned long flags; | |
283 | int i; | |
284 | ||
784d5858 | 285 | gig_dbg(DEBUG_ANY, "blocking all channels"); |
6fd5ea63 HL |
286 | spin_lock_irqsave(&cs->lock, flags); |
287 | for (i = 0; i < cs->channels; ++i) | |
288 | ++cs->bcs[i].use_count; | |
289 | spin_unlock_irqrestore(&cs->lock, flags); | |
290 | } | |
291 | ||
292 | static void clear_events(struct cardstate *cs) | |
293 | { | |
294 | struct event_t *ev; | |
295 | unsigned head, tail; | |
69049cc8 | 296 | unsigned long flags; |
6fd5ea63 | 297 | |
69049cc8 | 298 | spin_lock_irqsave(&cs->ev_lock, flags); |
6fd5ea63 | 299 | |
69049cc8 TS |
300 | head = cs->ev_head; |
301 | tail = cs->ev_tail; | |
6fd5ea63 HL |
302 | |
303 | while (tail != head) { | |
304 | ev = cs->events + head; | |
305 | kfree(ev->ptr); | |
6fd5ea63 HL |
306 | head = (head + 1) % MAX_EVENTS; |
307 | } | |
308 | ||
69049cc8 TS |
309 | cs->ev_head = tail; |
310 | ||
311 | spin_unlock_irqrestore(&cs->ev_lock, flags); | |
6fd5ea63 HL |
312 | } |
313 | ||
314 | struct event_t *gigaset_add_event(struct cardstate *cs, | |
784d5858 TS |
315 | struct at_state_t *at_state, int type, |
316 | void *ptr, int parameter, void *arg) | |
6fd5ea63 HL |
317 | { |
318 | unsigned long flags; | |
319 | unsigned next, tail; | |
320 | struct event_t *event = NULL; | |
321 | ||
322 | spin_lock_irqsave(&cs->ev_lock, flags); | |
323 | ||
69049cc8 | 324 | tail = cs->ev_tail; |
6fd5ea63 | 325 | next = (tail + 1) % MAX_EVENTS; |
69049cc8 | 326 | if (unlikely(next == cs->ev_head)) |
6fd5ea63 HL |
327 | err("event queue full"); |
328 | else { | |
329 | event = cs->events + tail; | |
330 | event->type = type; | |
331 | event->at_state = at_state; | |
332 | event->cid = -1; | |
333 | event->ptr = ptr; | |
334 | event->arg = arg; | |
335 | event->parameter = parameter; | |
69049cc8 | 336 | cs->ev_tail = next; |
6fd5ea63 HL |
337 | } |
338 | ||
339 | spin_unlock_irqrestore(&cs->ev_lock, flags); | |
340 | ||
341 | return event; | |
342 | } | |
343 | EXPORT_SYMBOL_GPL(gigaset_add_event); | |
344 | ||
345 | static void free_strings(struct at_state_t *at_state) | |
346 | { | |
347 | int i; | |
348 | ||
349 | for (i = 0; i < STR_NUM; ++i) { | |
350 | kfree(at_state->str_var[i]); | |
351 | at_state->str_var[i] = NULL; | |
352 | } | |
353 | } | |
354 | ||
355 | static void clear_at_state(struct at_state_t *at_state) | |
356 | { | |
357 | free_strings(at_state); | |
358 | } | |
359 | ||
360 | static void dealloc_at_states(struct cardstate *cs) | |
361 | { | |
362 | struct at_state_t *cur, *next; | |
363 | ||
364 | list_for_each_entry_safe(cur, next, &cs->temp_at_states, list) { | |
365 | list_del(&cur->list); | |
366 | free_strings(cur); | |
367 | kfree(cur); | |
368 | } | |
369 | } | |
370 | ||
371 | static void gigaset_freebcs(struct bc_state *bcs) | |
372 | { | |
373 | int i; | |
374 | ||
784d5858 | 375 | gig_dbg(DEBUG_INIT, "freeing bcs[%d]->hw", bcs->channel); |
6fd5ea63 | 376 | if (!bcs->cs->ops->freebcshw(bcs)) { |
784d5858 | 377 | gig_dbg(DEBUG_INIT, "failed"); |
6fd5ea63 HL |
378 | } |
379 | ||
784d5858 | 380 | gig_dbg(DEBUG_INIT, "clearing bcs[%d]->at_state", bcs->channel); |
6fd5ea63 | 381 | clear_at_state(&bcs->at_state); |
784d5858 | 382 | gig_dbg(DEBUG_INIT, "freeing bcs[%d]->skb", bcs->channel); |
6fd5ea63 HL |
383 | |
384 | if (bcs->skb) | |
385 | dev_kfree_skb(bcs->skb); | |
386 | for (i = 0; i < AT_NUM; ++i) { | |
387 | kfree(bcs->commands[i]); | |
388 | bcs->commands[i] = NULL; | |
389 | } | |
390 | } | |
391 | ||
70440cf2 TS |
392 | static struct cardstate *alloc_cs(struct gigaset_driver *drv) |
393 | { | |
394 | unsigned long flags; | |
395 | unsigned i; | |
396 | static struct cardstate *ret = NULL; | |
397 | ||
398 | spin_lock_irqsave(&drv->lock, flags); | |
399 | for (i = 0; i < drv->minors; ++i) { | |
400 | if (!(drv->flags[i] & VALID_MINOR)) { | |
401 | drv->flags[i] = VALID_MINOR; | |
402 | ret = drv->cs + i; | |
403 | } | |
404 | if (ret) | |
405 | break; | |
406 | } | |
407 | spin_unlock_irqrestore(&drv->lock, flags); | |
408 | return ret; | |
409 | } | |
410 | ||
411 | static void free_cs(struct cardstate *cs) | |
412 | { | |
413 | unsigned long flags; | |
414 | struct gigaset_driver *drv = cs->driver; | |
415 | spin_lock_irqsave(&drv->lock, flags); | |
416 | drv->flags[cs->minor_index] = 0; | |
417 | spin_unlock_irqrestore(&drv->lock, flags); | |
418 | } | |
419 | ||
420 | static void make_valid(struct cardstate *cs, unsigned mask) | |
421 | { | |
422 | unsigned long flags; | |
423 | struct gigaset_driver *drv = cs->driver; | |
424 | spin_lock_irqsave(&drv->lock, flags); | |
425 | drv->flags[cs->minor_index] |= mask; | |
426 | spin_unlock_irqrestore(&drv->lock, flags); | |
427 | } | |
428 | ||
429 | static void make_invalid(struct cardstate *cs, unsigned mask) | |
430 | { | |
431 | unsigned long flags; | |
432 | struct gigaset_driver *drv = cs->driver; | |
433 | spin_lock_irqsave(&drv->lock, flags); | |
434 | drv->flags[cs->minor_index] &= ~mask; | |
435 | spin_unlock_irqrestore(&drv->lock, flags); | |
436 | } | |
437 | ||
6fd5ea63 HL |
438 | void gigaset_freecs(struct cardstate *cs) |
439 | { | |
440 | int i; | |
441 | unsigned long flags; | |
442 | ||
443 | if (!cs) | |
444 | return; | |
445 | ||
abfd1dc7 | 446 | mutex_lock(&cs->mutex); |
6fd5ea63 HL |
447 | |
448 | if (!cs->bcs) | |
449 | goto f_cs; | |
450 | if (!cs->inbuf) | |
451 | goto f_bcs; | |
452 | ||
453 | spin_lock_irqsave(&cs->lock, flags); | |
69049cc8 | 454 | cs->running = 0; |
917f5085 TS |
455 | spin_unlock_irqrestore(&cs->lock, flags); /* event handler and timer are |
456 | not rescheduled below */ | |
6fd5ea63 HL |
457 | |
458 | tasklet_kill(&cs->event_tasklet); | |
459 | del_timer_sync(&cs->timer); | |
460 | ||
461 | switch (cs->cs_init) { | |
462 | default: | |
463 | gigaset_if_free(cs); | |
464 | ||
784d5858 | 465 | gig_dbg(DEBUG_INIT, "clearing hw"); |
6fd5ea63 HL |
466 | cs->ops->freecshw(cs); |
467 | ||
468 | //FIXME cmdbuf | |
469 | ||
470 | /* fall through */ | |
471 | case 2: /* error in initcshw */ | |
472 | /* Deregister from LL */ | |
473 | make_invalid(cs, VALID_ID); | |
784d5858 | 474 | gig_dbg(DEBUG_INIT, "clearing iif"); |
6fd5ea63 HL |
475 | gigaset_i4l_cmd(cs, ISDN_STAT_UNLOAD); |
476 | ||
477 | /* fall through */ | |
478 | case 1: /* error when regestering to LL */ | |
784d5858 | 479 | gig_dbg(DEBUG_INIT, "clearing at_state"); |
6fd5ea63 HL |
480 | clear_at_state(&cs->at_state); |
481 | dealloc_at_states(cs); | |
482 | ||
483 | /* fall through */ | |
484 | case 0: /* error in one call to initbcs */ | |
485 | for (i = 0; i < cs->channels; ++i) { | |
784d5858 | 486 | gig_dbg(DEBUG_INIT, "clearing bcs[%d]", i); |
6fd5ea63 HL |
487 | gigaset_freebcs(cs->bcs + i); |
488 | } | |
489 | ||
490 | clear_events(cs); | |
784d5858 | 491 | gig_dbg(DEBUG_INIT, "freeing inbuf"); |
6fd5ea63 HL |
492 | kfree(cs->inbuf); |
493 | } | |
784d5858 | 494 | f_bcs: gig_dbg(DEBUG_INIT, "freeing bcs[]"); |
6fd5ea63 | 495 | kfree(cs->bcs); |
784d5858 | 496 | f_cs: gig_dbg(DEBUG_INIT, "freeing cs"); |
abfd1dc7 | 497 | mutex_unlock(&cs->mutex); |
6fd5ea63 HL |
498 | free_cs(cs); |
499 | } | |
500 | EXPORT_SYMBOL_GPL(gigaset_freecs); | |
501 | ||
502 | void gigaset_at_init(struct at_state_t *at_state, struct bc_state *bcs, | |
784d5858 | 503 | struct cardstate *cs, int cid) |
6fd5ea63 HL |
504 | { |
505 | int i; | |
506 | ||
507 | INIT_LIST_HEAD(&at_state->list); | |
508 | at_state->waiting = 0; | |
509 | at_state->getstring = 0; | |
510 | at_state->pending_commands = 0; | |
511 | at_state->timer_expires = 0; | |
512 | at_state->timer_active = 0; | |
69049cc8 TS |
513 | at_state->timer_index = 0; |
514 | at_state->seq_index = 0; | |
6fd5ea63 HL |
515 | at_state->ConState = 0; |
516 | for (i = 0; i < STR_NUM; ++i) | |
517 | at_state->str_var[i] = NULL; | |
518 | at_state->int_var[VAR_ZDLE] = 0; | |
519 | at_state->int_var[VAR_ZCTP] = -1; | |
520 | at_state->int_var[VAR_ZSAU] = ZSAU_NULL; | |
521 | at_state->cs = cs; | |
522 | at_state->bcs = bcs; | |
523 | at_state->cid = cid; | |
524 | if (!cid) | |
525 | at_state->replystruct = cs->tabnocid; | |
526 | else | |
527 | at_state->replystruct = cs->tabcid; | |
528 | } | |
529 | ||
530 | ||
531 | static void gigaset_inbuf_init(struct inbuf_t *inbuf, struct bc_state *bcs, | |
784d5858 | 532 | struct cardstate *cs, int inputstate) |
6fd5ea63 HL |
533 | /* inbuf->read must be allocated before! */ |
534 | { | |
535 | atomic_set(&inbuf->head, 0); | |
536 | atomic_set(&inbuf->tail, 0); | |
537 | inbuf->cs = cs; | |
538 | inbuf->bcs = bcs; /*base driver: NULL*/ | |
539 | inbuf->rcvbuf = NULL; //FIXME | |
540 | inbuf->inputstate = inputstate; | |
541 | } | |
542 | ||
714e8236 TS |
543 | /* append received bytes to inbuf */ |
544 | int gigaset_fill_inbuf(struct inbuf_t *inbuf, const unsigned char *src, | |
545 | unsigned numbytes) | |
546 | { | |
547 | unsigned n, head, tail, bytesleft; | |
548 | ||
549 | gig_dbg(DEBUG_INTR, "received %u bytes", numbytes); | |
550 | ||
551 | if (!numbytes) | |
552 | return 0; | |
553 | ||
554 | bytesleft = numbytes; | |
555 | tail = atomic_read(&inbuf->tail); | |
556 | head = atomic_read(&inbuf->head); | |
557 | gig_dbg(DEBUG_INTR, "buffer state: %u -> %u", head, tail); | |
558 | ||
559 | while (bytesleft) { | |
560 | if (head > tail) | |
561 | n = head - 1 - tail; | |
562 | else if (head == 0) | |
563 | n = (RBUFSIZE-1) - tail; | |
564 | else | |
565 | n = RBUFSIZE - tail; | |
566 | if (!n) { | |
567 | dev_err(inbuf->cs->dev, | |
568 | "buffer overflow (%u bytes lost)", bytesleft); | |
569 | break; | |
570 | } | |
571 | if (n > bytesleft) | |
572 | n = bytesleft; | |
573 | memcpy(inbuf->data + tail, src, n); | |
574 | bytesleft -= n; | |
575 | tail = (tail + n) % RBUFSIZE; | |
576 | src += n; | |
577 | } | |
578 | gig_dbg(DEBUG_INTR, "setting tail to %u", tail); | |
579 | atomic_set(&inbuf->tail, tail); | |
580 | return numbytes != bytesleft; | |
581 | } | |
582 | EXPORT_SYMBOL_GPL(gigaset_fill_inbuf); | |
583 | ||
6fd5ea63 HL |
584 | /* Initialize the b-channel structure */ |
585 | static struct bc_state *gigaset_initbcs(struct bc_state *bcs, | |
784d5858 | 586 | struct cardstate *cs, int channel) |
6fd5ea63 HL |
587 | { |
588 | int i; | |
589 | ||
590 | bcs->tx_skb = NULL; //FIXME -> hw part | |
591 | ||
592 | skb_queue_head_init(&bcs->squeue); | |
593 | ||
594 | bcs->corrupted = 0; | |
595 | bcs->trans_down = 0; | |
596 | bcs->trans_up = 0; | |
597 | ||
784d5858 | 598 | gig_dbg(DEBUG_INIT, "setting up bcs[%d]->at_state", channel); |
6fd5ea63 HL |
599 | gigaset_at_init(&bcs->at_state, bcs, cs, -1); |
600 | ||
601 | bcs->rcvbytes = 0; | |
602 | ||
603 | #ifdef CONFIG_GIGASET_DEBUG | |
604 | bcs->emptycount = 0; | |
605 | #endif | |
606 | ||
784d5858 | 607 | gig_dbg(DEBUG_INIT, "allocating bcs[%d]->skb", channel); |
6fd5ea63 HL |
608 | bcs->fcs = PPP_INITFCS; |
609 | bcs->inputstate = 0; | |
610 | if (cs->ignoreframes) { | |
611 | bcs->inputstate |= INS_skip_frame; | |
612 | bcs->skb = NULL; | |
613 | } else if ((bcs->skb = dev_alloc_skb(SBUFSIZE + HW_HDR_LEN)) != NULL) | |
614 | skb_reserve(bcs->skb, HW_HDR_LEN); | |
615 | else { | |
784d5858 | 616 | dev_warn(cs->dev, "could not allocate skb\n"); |
6fd5ea63 HL |
617 | bcs->inputstate |= INS_skip_frame; |
618 | } | |
619 | ||
620 | bcs->channel = channel; | |
621 | bcs->cs = cs; | |
622 | ||
623 | bcs->chstate = 0; | |
624 | bcs->use_count = 1; | |
625 | bcs->busy = 0; | |
626 | bcs->ignore = cs->ignoreframes; | |
627 | ||
628 | for (i = 0; i < AT_NUM; ++i) | |
629 | bcs->commands[i] = NULL; | |
630 | ||
784d5858 | 631 | gig_dbg(DEBUG_INIT, " setting up bcs[%d]->hw", channel); |
6fd5ea63 HL |
632 | if (cs->ops->initbcshw(bcs)) |
633 | return bcs; | |
634 | ||
784d5858 | 635 | gig_dbg(DEBUG_INIT, " failed"); |
6fd5ea63 | 636 | |
784d5858 | 637 | gig_dbg(DEBUG_INIT, " freeing bcs[%d]->skb", channel); |
6fd5ea63 HL |
638 | if (bcs->skb) |
639 | dev_kfree_skb(bcs->skb); | |
640 | ||
641 | return NULL; | |
642 | } | |
643 | ||
644 | /* gigaset_initcs | |
645 | * Allocate and initialize cardstate structure for Gigaset driver | |
646 | * Calls hardware dependent gigaset_initcshw() function | |
647 | * Calls B channel initialization function gigaset_initbcs() for each B channel | |
648 | * parameters: | |
784d5858 | 649 | * drv hardware driver the device belongs to |
6fd5ea63 | 650 | * channels number of B channels supported by device |
917f5085 TS |
651 | * onechannel !=0: B channel data and AT commands share one |
652 | * communication channel | |
6fd5ea63 HL |
653 | * ==0: B channels have separate communication channels |
654 | * ignoreframes number of frames to ignore after setting up B channel | |
655 | * cidmode !=0: start in CallID mode | |
656 | * modulename name of driver module (used for I4L registration) | |
657 | * return value: | |
658 | * pointer to cardstate structure | |
659 | */ | |
660 | struct cardstate *gigaset_initcs(struct gigaset_driver *drv, int channels, | |
661 | int onechannel, int ignoreframes, | |
662 | int cidmode, const char *modulename) | |
663 | { | |
664 | struct cardstate *cs = NULL; | |
69049cc8 | 665 | unsigned long flags; |
6fd5ea63 HL |
666 | int i; |
667 | ||
784d5858 | 668 | gig_dbg(DEBUG_INIT, "allocating cs"); |
6fd5ea63 HL |
669 | cs = alloc_cs(drv); |
670 | if (!cs) | |
671 | goto error; | |
784d5858 | 672 | gig_dbg(DEBUG_INIT, "allocating bcs[0..%d]", channels - 1); |
6fd5ea63 HL |
673 | cs->bcs = kmalloc(channels * sizeof(struct bc_state), GFP_KERNEL); |
674 | if (!cs->bcs) | |
675 | goto error; | |
784d5858 | 676 | gig_dbg(DEBUG_INIT, "allocating inbuf"); |
6fd5ea63 HL |
677 | cs->inbuf = kmalloc(sizeof(struct inbuf_t), GFP_KERNEL); |
678 | if (!cs->inbuf) | |
679 | goto error; | |
680 | ||
681 | cs->cs_init = 0; | |
682 | cs->channels = channels; | |
683 | cs->onechannel = onechannel; | |
684 | cs->ignoreframes = ignoreframes; | |
685 | INIT_LIST_HEAD(&cs->temp_at_states); | |
69049cc8 | 686 | cs->running = 0; |
6fd5ea63 HL |
687 | init_timer(&cs->timer); /* clear next & prev */ |
688 | spin_lock_init(&cs->ev_lock); | |
69049cc8 TS |
689 | cs->ev_tail = 0; |
690 | cs->ev_head = 0; | |
abfd1dc7 TS |
691 | mutex_init(&cs->mutex); |
692 | mutex_lock(&cs->mutex); | |
693 | ||
917f5085 TS |
694 | tasklet_init(&cs->event_tasklet, &gigaset_handle_event, |
695 | (unsigned long) cs); | |
6fd5ea63 HL |
696 | atomic_set(&cs->commands_pending, 0); |
697 | cs->cur_at_seq = 0; | |
698 | cs->gotfwver = -1; | |
699 | cs->open_count = 0; | |
784d5858 | 700 | cs->dev = NULL; |
6fd5ea63 | 701 | cs->tty = NULL; |
69049cc8 | 702 | cs->cidmode = cidmode != 0; |
6fd5ea63 HL |
703 | |
704 | //if(onechannel) { //FIXME | |
705 | cs->tabnocid = gigaset_tab_nocid_m10x; | |
706 | cs->tabcid = gigaset_tab_cid_m10x; | |
707 | //} else { | |
708 | // cs->tabnocid = gigaset_tab_nocid; | |
709 | // cs->tabcid = gigaset_tab_cid; | |
710 | //} | |
711 | ||
712 | init_waitqueue_head(&cs->waitqueue); | |
713 | cs->waiting = 0; | |
714 | ||
715 | atomic_set(&cs->mode, M_UNKNOWN); | |
716 | atomic_set(&cs->mstate, MS_UNINITIALIZED); | |
717 | ||
718 | for (i = 0; i < channels; ++i) { | |
784d5858 | 719 | gig_dbg(DEBUG_INIT, "setting up bcs[%d].read", i); |
6fd5ea63 HL |
720 | if (!gigaset_initbcs(cs->bcs + i, cs, i)) |
721 | goto error; | |
722 | } | |
723 | ||
724 | ++cs->cs_init; | |
725 | ||
784d5858 | 726 | gig_dbg(DEBUG_INIT, "setting up at_state"); |
6fd5ea63 HL |
727 | spin_lock_init(&cs->lock); |
728 | gigaset_at_init(&cs->at_state, NULL, cs, 0); | |
729 | cs->dle = 0; | |
730 | cs->cbytes = 0; | |
731 | ||
784d5858 | 732 | gig_dbg(DEBUG_INIT, "setting up inbuf"); |
6fd5ea63 HL |
733 | if (onechannel) { //FIXME distinction necessary? |
734 | gigaset_inbuf_init(cs->inbuf, cs->bcs, cs, INS_command); | |
735 | } else | |
736 | gigaset_inbuf_init(cs->inbuf, NULL, cs, INS_command); | |
737 | ||
69049cc8 TS |
738 | cs->connected = 0; |
739 | cs->isdn_up = 0; | |
6fd5ea63 | 740 | |
784d5858 | 741 | gig_dbg(DEBUG_INIT, "setting up cmdbuf"); |
6fd5ea63 HL |
742 | cs->cmdbuf = cs->lastcmdbuf = NULL; |
743 | spin_lock_init(&cs->cmdlock); | |
744 | cs->curlen = 0; | |
745 | cs->cmdbytes = 0; | |
746 | ||
784d5858 | 747 | gig_dbg(DEBUG_INIT, "setting up iif"); |
6fd5ea63 | 748 | if (!gigaset_register_to_LL(cs, modulename)) { |
784d5858 | 749 | err("register_isdn failed"); |
6fd5ea63 HL |
750 | goto error; |
751 | } | |
752 | ||
753 | make_valid(cs, VALID_ID); | |
754 | ++cs->cs_init; | |
784d5858 | 755 | gig_dbg(DEBUG_INIT, "setting up hw"); |
6fd5ea63 HL |
756 | if (!cs->ops->initcshw(cs)) |
757 | goto error; | |
758 | ||
759 | ++cs->cs_init; | |
760 | ||
761 | gigaset_if_init(cs); | |
762 | ||
69049cc8 TS |
763 | spin_lock_irqsave(&cs->lock, flags); |
764 | cs->running = 1; | |
765 | spin_unlock_irqrestore(&cs->lock, flags); | |
ec81b5e6 TS |
766 | setup_timer(&cs->timer, timer_tick, (unsigned long) cs); |
767 | cs->timer.expires = jiffies + msecs_to_jiffies(GIG_TICK); | |
6fd5ea63 HL |
768 | /* FIXME: can jiffies increase too much until the timer is added? |
769 | * Same problem(?) with mod_timer() in timer_tick(). */ | |
770 | add_timer(&cs->timer); | |
771 | ||
784d5858 | 772 | gig_dbg(DEBUG_INIT, "cs initialized"); |
abfd1dc7 | 773 | mutex_unlock(&cs->mutex); |
6fd5ea63 HL |
774 | return cs; |
775 | ||
776 | error: if (cs) | |
abfd1dc7 | 777 | mutex_unlock(&cs->mutex); |
784d5858 | 778 | gig_dbg(DEBUG_INIT, "failed"); |
6fd5ea63 HL |
779 | gigaset_freecs(cs); |
780 | return NULL; | |
781 | } | |
782 | EXPORT_SYMBOL_GPL(gigaset_initcs); | |
783 | ||
917f5085 TS |
784 | /* ReInitialize the b-channel structure */ |
785 | /* e.g. called on hangup, disconnect */ | |
6fd5ea63 HL |
786 | void gigaset_bcs_reinit(struct bc_state *bcs) |
787 | { | |
788 | struct sk_buff *skb; | |
789 | struct cardstate *cs = bcs->cs; | |
790 | unsigned long flags; | |
791 | ||
792 | while ((skb = skb_dequeue(&bcs->squeue)) != NULL) | |
793 | dev_kfree_skb(skb); | |
794 | ||
917f5085 | 795 | spin_lock_irqsave(&cs->lock, flags); |
6fd5ea63 HL |
796 | clear_at_state(&bcs->at_state); |
797 | bcs->at_state.ConState = 0; | |
798 | bcs->at_state.timer_active = 0; | |
799 | bcs->at_state.timer_expires = 0; | |
784d5858 | 800 | bcs->at_state.cid = -1; /* No CID defined */ |
6fd5ea63 HL |
801 | spin_unlock_irqrestore(&cs->lock, flags); |
802 | ||
803 | bcs->inputstate = 0; | |
804 | ||
805 | #ifdef CONFIG_GIGASET_DEBUG | |
806 | bcs->emptycount = 0; | |
807 | #endif | |
808 | ||
809 | bcs->fcs = PPP_INITFCS; | |
810 | bcs->chstate = 0; | |
811 | ||
812 | bcs->ignore = cs->ignoreframes; | |
813 | if (bcs->ignore) | |
814 | bcs->inputstate |= INS_skip_frame; | |
815 | ||
816 | ||
817 | cs->ops->reinitbcshw(bcs); | |
818 | } | |
819 | ||
820 | static void cleanup_cs(struct cardstate *cs) | |
821 | { | |
822 | struct cmdbuf_t *cb, *tcb; | |
823 | int i; | |
824 | unsigned long flags; | |
825 | ||
826 | spin_lock_irqsave(&cs->lock, flags); | |
827 | ||
828 | atomic_set(&cs->mode, M_UNKNOWN); | |
829 | atomic_set(&cs->mstate, MS_UNINITIALIZED); | |
830 | ||
831 | clear_at_state(&cs->at_state); | |
832 | dealloc_at_states(cs); | |
833 | free_strings(&cs->at_state); | |
834 | gigaset_at_init(&cs->at_state, NULL, cs, 0); | |
835 | ||
836 | kfree(cs->inbuf->rcvbuf); | |
837 | cs->inbuf->rcvbuf = NULL; | |
838 | cs->inbuf->inputstate = INS_command; | |
839 | atomic_set(&cs->inbuf->head, 0); | |
840 | atomic_set(&cs->inbuf->tail, 0); | |
841 | ||
842 | cb = cs->cmdbuf; | |
843 | while (cb) { | |
844 | tcb = cb; | |
845 | cb = cb->next; | |
846 | kfree(tcb); | |
847 | } | |
848 | cs->cmdbuf = cs->lastcmdbuf = NULL; | |
849 | cs->curlen = 0; | |
850 | cs->cmdbytes = 0; | |
851 | cs->gotfwver = -1; | |
852 | cs->dle = 0; | |
853 | cs->cur_at_seq = 0; | |
854 | atomic_set(&cs->commands_pending, 0); | |
855 | cs->cbytes = 0; | |
856 | ||
857 | spin_unlock_irqrestore(&cs->lock, flags); | |
858 | ||
859 | for (i = 0; i < cs->channels; ++i) { | |
860 | gigaset_freebcs(cs->bcs + i); | |
861 | if (!gigaset_initbcs(cs->bcs + i, cs, i)) | |
862 | break; //FIXME error handling | |
863 | } | |
864 | ||
865 | if (cs->waiting) { | |
866 | cs->cmd_result = -ENODEV; | |
867 | cs->waiting = 0; | |
868 | wake_up_interruptible(&cs->waitqueue); | |
869 | } | |
870 | } | |
871 | ||
872 | ||
873 | int gigaset_start(struct cardstate *cs) | |
874 | { | |
69049cc8 TS |
875 | unsigned long flags; |
876 | ||
abfd1dc7 | 877 | if (mutex_lock_interruptible(&cs->mutex)) |
6fd5ea63 | 878 | return 0; |
6fd5ea63 | 879 | |
69049cc8 TS |
880 | spin_lock_irqsave(&cs->lock, flags); |
881 | cs->connected = 1; | |
882 | spin_unlock_irqrestore(&cs->lock, flags); | |
6fd5ea63 HL |
883 | |
884 | if (atomic_read(&cs->mstate) != MS_LOCKED) { | |
885 | cs->ops->set_modem_ctrl(cs, 0, TIOCM_DTR|TIOCM_RTS); | |
886 | cs->ops->baud_rate(cs, B115200); | |
887 | cs->ops->set_line_ctrl(cs, CS8); | |
888 | cs->control_state = TIOCM_DTR|TIOCM_RTS; | |
889 | } else { | |
890 | //FIXME use some saved values? | |
891 | } | |
892 | ||
893 | cs->waiting = 1; | |
894 | ||
895 | if (!gigaset_add_event(cs, &cs->at_state, EV_START, NULL, 0, NULL)) { | |
896 | cs->waiting = 0; | |
897 | //FIXME what should we do? | |
898 | goto error; | |
899 | } | |
900 | ||
784d5858 | 901 | gig_dbg(DEBUG_CMD, "scheduling START"); |
6fd5ea63 HL |
902 | gigaset_schedule_event(cs); |
903 | ||
904 | wait_event(cs->waitqueue, !cs->waiting); | |
905 | ||
b1d47464 TS |
906 | /* set up device sysfs */ |
907 | gigaset_init_dev_sysfs(cs); | |
908 | ||
abfd1dc7 | 909 | mutex_unlock(&cs->mutex); |
6fd5ea63 HL |
910 | return 1; |
911 | ||
912 | error: | |
abfd1dc7 | 913 | mutex_unlock(&cs->mutex); |
6fd5ea63 HL |
914 | return 0; |
915 | } | |
916 | EXPORT_SYMBOL_GPL(gigaset_start); | |
917 | ||
918 | void gigaset_shutdown(struct cardstate *cs) | |
919 | { | |
abfd1dc7 | 920 | mutex_lock(&cs->mutex); |
6fd5ea63 HL |
921 | |
922 | cs->waiting = 1; | |
923 | ||
924 | if (!gigaset_add_event(cs, &cs->at_state, EV_SHUTDOWN, NULL, 0, NULL)) { | |
925 | //FIXME what should we do? | |
926 | goto exit; | |
927 | } | |
928 | ||
784d5858 | 929 | gig_dbg(DEBUG_CMD, "scheduling SHUTDOWN"); |
6fd5ea63 HL |
930 | gigaset_schedule_event(cs); |
931 | ||
932 | if (wait_event_interruptible(cs->waitqueue, !cs->waiting)) { | |
784d5858 | 933 | warn("%s: aborted", __func__); |
6fd5ea63 HL |
934 | //FIXME |
935 | } | |
936 | ||
937 | if (atomic_read(&cs->mstate) != MS_LOCKED) { | |
938 | //FIXME? | |
939 | //gigaset_baud_rate(cs, B115200); | |
940 | //gigaset_set_line_ctrl(cs, CS8); | |
941 | //gigaset_set_modem_ctrl(cs, TIOCM_DTR|TIOCM_RTS, 0); | |
942 | //cs->control_state = 0; | |
943 | } else { | |
944 | //FIXME use some saved values? | |
945 | } | |
946 | ||
947 | cleanup_cs(cs); | |
948 | ||
949 | exit: | |
abfd1dc7 | 950 | mutex_unlock(&cs->mutex); |
6fd5ea63 HL |
951 | } |
952 | EXPORT_SYMBOL_GPL(gigaset_shutdown); | |
953 | ||
954 | void gigaset_stop(struct cardstate *cs) | |
955 | { | |
abfd1dc7 | 956 | mutex_lock(&cs->mutex); |
6fd5ea63 | 957 | |
6fd5ea63 HL |
958 | cs->waiting = 1; |
959 | ||
960 | if (!gigaset_add_event(cs, &cs->at_state, EV_STOP, NULL, 0, NULL)) { | |
961 | //FIXME what should we do? | |
962 | goto exit; | |
963 | } | |
964 | ||
784d5858 | 965 | gig_dbg(DEBUG_CMD, "scheduling STOP"); |
6fd5ea63 HL |
966 | gigaset_schedule_event(cs); |
967 | ||
968 | if (wait_event_interruptible(cs->waitqueue, !cs->waiting)) { | |
784d5858 | 969 | warn("%s: aborted", __func__); |
6fd5ea63 HL |
970 | //FIXME |
971 | } | |
972 | ||
69049cc8 TS |
973 | /* clear device sysfs */ |
974 | gigaset_free_dev_sysfs(cs); | |
6fd5ea63 HL |
975 | |
976 | cleanup_cs(cs); | |
977 | ||
978 | exit: | |
abfd1dc7 | 979 | mutex_unlock(&cs->mutex); |
6fd5ea63 HL |
980 | } |
981 | EXPORT_SYMBOL_GPL(gigaset_stop); | |
982 | ||
983 | static LIST_HEAD(drivers); | |
984 | static spinlock_t driver_lock = SPIN_LOCK_UNLOCKED; | |
985 | ||
986 | struct cardstate *gigaset_get_cs_by_id(int id) | |
987 | { | |
988 | unsigned long flags; | |
989 | static struct cardstate *ret = NULL; | |
990 | static struct cardstate *cs; | |
991 | struct gigaset_driver *drv; | |
992 | unsigned i; | |
993 | ||
994 | spin_lock_irqsave(&driver_lock, flags); | |
995 | list_for_each_entry(drv, &drivers, list) { | |
996 | spin_lock(&drv->lock); | |
997 | for (i = 0; i < drv->minors; ++i) { | |
998 | if (drv->flags[i] & VALID_ID) { | |
999 | cs = drv->cs + i; | |
1000 | if (cs->myid == id) | |
1001 | ret = cs; | |
1002 | } | |
1003 | if (ret) | |
1004 | break; | |
1005 | } | |
1006 | spin_unlock(&drv->lock); | |
1007 | if (ret) | |
1008 | break; | |
1009 | } | |
1010 | spin_unlock_irqrestore(&driver_lock, flags); | |
1011 | return ret; | |
1012 | } | |
1013 | ||
1014 | void gigaset_debugdrivers(void) | |
1015 | { | |
1016 | unsigned long flags; | |
1017 | static struct cardstate *cs; | |
1018 | struct gigaset_driver *drv; | |
1019 | unsigned i; | |
1020 | ||
1021 | spin_lock_irqsave(&driver_lock, flags); | |
1022 | list_for_each_entry(drv, &drivers, list) { | |
784d5858 | 1023 | gig_dbg(DEBUG_DRIVER, "driver %p", drv); |
6fd5ea63 HL |
1024 | spin_lock(&drv->lock); |
1025 | for (i = 0; i < drv->minors; ++i) { | |
784d5858 TS |
1026 | gig_dbg(DEBUG_DRIVER, " index %u", i); |
1027 | gig_dbg(DEBUG_DRIVER, " flags 0x%02x", | |
1028 | drv->flags[i]); | |
6fd5ea63 | 1029 | cs = drv->cs + i; |
784d5858 TS |
1030 | gig_dbg(DEBUG_DRIVER, " cardstate %p", cs); |
1031 | gig_dbg(DEBUG_DRIVER, " minor_index %u", | |
1032 | cs->minor_index); | |
1033 | gig_dbg(DEBUG_DRIVER, " driver %p", cs->driver); | |
1034 | gig_dbg(DEBUG_DRIVER, " i4l id %d", cs->myid); | |
6fd5ea63 HL |
1035 | } |
1036 | spin_unlock(&drv->lock); | |
1037 | } | |
1038 | spin_unlock_irqrestore(&driver_lock, flags); | |
1039 | } | |
6fd5ea63 | 1040 | |
8ca445df | 1041 | static struct cardstate *gigaset_get_cs_by_minor(unsigned minor) |
6fd5ea63 HL |
1042 | { |
1043 | unsigned long flags; | |
1044 | static struct cardstate *ret = NULL; | |
1045 | struct gigaset_driver *drv; | |
1046 | unsigned index; | |
1047 | ||
1048 | spin_lock_irqsave(&driver_lock, flags); | |
1049 | list_for_each_entry(drv, &drivers, list) { | |
1050 | if (minor < drv->minor || minor >= drv->minor + drv->minors) | |
1051 | continue; | |
1052 | index = minor - drv->minor; | |
1053 | spin_lock(&drv->lock); | |
1054 | if (drv->flags[index] & VALID_MINOR) | |
1055 | ret = drv->cs + index; | |
1056 | spin_unlock(&drv->lock); | |
1057 | if (ret) | |
1058 | break; | |
1059 | } | |
1060 | spin_unlock_irqrestore(&driver_lock, flags); | |
1061 | return ret; | |
1062 | } | |
1063 | ||
8ca445df AB |
1064 | struct cardstate *gigaset_get_cs_by_tty(struct tty_struct *tty) |
1065 | { | |
1066 | if (tty->index < 0 || tty->index >= tty->driver->num) | |
1067 | return NULL; | |
1068 | return gigaset_get_cs_by_minor(tty->index + tty->driver->minor_start); | |
1069 | } | |
1070 | ||
6fd5ea63 HL |
1071 | void gigaset_freedriver(struct gigaset_driver *drv) |
1072 | { | |
1073 | unsigned long flags; | |
1074 | ||
1075 | spin_lock_irqsave(&driver_lock, flags); | |
1076 | list_del(&drv->list); | |
1077 | spin_unlock_irqrestore(&driver_lock, flags); | |
1078 | ||
1079 | gigaset_if_freedriver(drv); | |
1080 | module_put(drv->owner); | |
1081 | ||
1082 | kfree(drv->cs); | |
1083 | kfree(drv->flags); | |
1084 | kfree(drv); | |
1085 | } | |
1086 | EXPORT_SYMBOL_GPL(gigaset_freedriver); | |
1087 | ||
1088 | /* gigaset_initdriver | |
1089 | * Allocate and initialize gigaset_driver structure. Initialize interface. | |
1090 | * parameters: | |
784d5858 TS |
1091 | * minor First minor number |
1092 | * minors Number of minors this driver can handle | |
1093 | * procname Name of the driver | |
1094 | * devname Name of the device files (prefix without minor number) | |
1095 | * devfsname Devfs name of the device files without %d | |
6fd5ea63 | 1096 | * return value: |
784d5858 | 1097 | * Pointer to the gigaset_driver structure on success, NULL on failure. |
6fd5ea63 HL |
1098 | */ |
1099 | struct gigaset_driver *gigaset_initdriver(unsigned minor, unsigned minors, | |
784d5858 TS |
1100 | const char *procname, |
1101 | const char *devname, | |
1102 | const char *devfsname, | |
1103 | const struct gigaset_ops *ops, | |
1104 | struct module *owner) | |
6fd5ea63 HL |
1105 | { |
1106 | struct gigaset_driver *drv; | |
1107 | unsigned long flags; | |
1108 | unsigned i; | |
1109 | ||
1110 | drv = kmalloc(sizeof *drv, GFP_KERNEL); | |
1111 | if (!drv) | |
1112 | return NULL; | |
f4675c70 | 1113 | |
6fd5ea63 | 1114 | if (!try_module_get(owner)) |
f4675c70 | 1115 | goto out1; |
6fd5ea63 HL |
1116 | |
1117 | drv->cs = NULL; | |
1118 | drv->have_tty = 0; | |
1119 | drv->minor = minor; | |
1120 | drv->minors = minors; | |
1121 | spin_lock_init(&drv->lock); | |
1122 | drv->blocked = 0; | |
1123 | drv->ops = ops; | |
1124 | drv->owner = owner; | |
1125 | INIT_LIST_HEAD(&drv->list); | |
1126 | ||
1127 | drv->cs = kmalloc(minors * sizeof *drv->cs, GFP_KERNEL); | |
1128 | if (!drv->cs) | |
f4675c70 AB |
1129 | goto out2; |
1130 | ||
6fd5ea63 HL |
1131 | drv->flags = kmalloc(minors * sizeof *drv->flags, GFP_KERNEL); |
1132 | if (!drv->flags) | |
f4675c70 | 1133 | goto out3; |
6fd5ea63 HL |
1134 | |
1135 | for (i = 0; i < minors; ++i) { | |
1136 | drv->flags[i] = 0; | |
1137 | drv->cs[i].driver = drv; | |
1138 | drv->cs[i].ops = drv->ops; | |
1139 | drv->cs[i].minor_index = i; | |
1140 | } | |
1141 | ||
1142 | gigaset_if_initdriver(drv, procname, devname, devfsname); | |
1143 | ||
1144 | spin_lock_irqsave(&driver_lock, flags); | |
1145 | list_add(&drv->list, &drivers); | |
1146 | spin_unlock_irqrestore(&driver_lock, flags); | |
1147 | ||
1148 | return drv; | |
1149 | ||
f4675c70 | 1150 | out3: |
6fd5ea63 | 1151 | kfree(drv->cs); |
f4675c70 AB |
1152 | out2: |
1153 | module_put(owner); | |
6fd5ea63 HL |
1154 | out1: |
1155 | kfree(drv); | |
6fd5ea63 HL |
1156 | return NULL; |
1157 | } | |
1158 | EXPORT_SYMBOL_GPL(gigaset_initdriver); | |
1159 | ||
6fd5ea63 HL |
1160 | /* For drivers without fixed assignment device<->cardstate (usb) */ |
1161 | struct cardstate *gigaset_getunassignedcs(struct gigaset_driver *drv) | |
1162 | { | |
1163 | unsigned long flags; | |
1164 | struct cardstate *cs = NULL; | |
1165 | unsigned i; | |
1166 | ||
1167 | spin_lock_irqsave(&drv->lock, flags); | |
1168 | if (drv->blocked) | |
1169 | goto exit; | |
1170 | for (i = 0; i < drv->minors; ++i) { | |
1171 | if ((drv->flags[i] & VALID_MINOR) && | |
1172 | !(drv->flags[i] & ASSIGNED)) { | |
1173 | drv->flags[i] |= ASSIGNED; | |
1174 | cs = drv->cs + i; | |
1175 | break; | |
1176 | } | |
1177 | } | |
1178 | exit: | |
1179 | spin_unlock_irqrestore(&drv->lock, flags); | |
1180 | return cs; | |
1181 | } | |
1182 | EXPORT_SYMBOL_GPL(gigaset_getunassignedcs); | |
1183 | ||
1184 | void gigaset_unassign(struct cardstate *cs) | |
1185 | { | |
1186 | unsigned long flags; | |
1187 | unsigned *minor_flags; | |
1188 | struct gigaset_driver *drv; | |
1189 | ||
1190 | if (!cs) | |
1191 | return; | |
1192 | drv = cs->driver; | |
1193 | spin_lock_irqsave(&drv->lock, flags); | |
1194 | minor_flags = drv->flags + cs->minor_index; | |
1195 | if (*minor_flags & VALID_MINOR) | |
1196 | *minor_flags &= ~ASSIGNED; | |
1197 | spin_unlock_irqrestore(&drv->lock, flags); | |
1198 | } | |
1199 | EXPORT_SYMBOL_GPL(gigaset_unassign); | |
1200 | ||
1201 | void gigaset_blockdriver(struct gigaset_driver *drv) | |
1202 | { | |
1203 | unsigned long flags; | |
1204 | spin_lock_irqsave(&drv->lock, flags); | |
1205 | drv->blocked = 1; | |
1206 | spin_unlock_irqrestore(&drv->lock, flags); | |
1207 | } | |
1208 | EXPORT_SYMBOL_GPL(gigaset_blockdriver); | |
1209 | ||
1210 | static int __init gigaset_init_module(void) | |
1211 | { | |
1212 | /* in accordance with the principle of least astonishment, | |
1213 | * setting the 'debug' parameter to 1 activates a sensible | |
1214 | * set of default debug levels | |
1215 | */ | |
1216 | if (gigaset_debuglevel == 1) | |
1217 | gigaset_debuglevel = DEBUG_DEFAULT; | |
1218 | ||
1219 | info(DRIVER_AUTHOR); | |
1220 | info(DRIVER_DESC); | |
1221 | return 0; | |
1222 | } | |
1223 | ||
1224 | static void __exit gigaset_exit_module(void) | |
1225 | { | |
1226 | } | |
1227 | ||
1228 | module_init(gigaset_init_module); | |
1229 | module_exit(gigaset_exit_module); | |
1230 | ||
1231 | MODULE_AUTHOR(DRIVER_AUTHOR); | |
1232 | MODULE_DESCRIPTION(DRIVER_DESC); | |
1233 | ||
1234 | MODULE_LICENSE("GPL"); |