2 * Stuff used by all variants of the driver
4 * Copyright (c) 2001 by Stefan Eilers,
5 * Hansjoerg Lipp <hjlipp@web.de>,
6 * Tilman Schmidt <tilman@imap.cc>.
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 * =====================================================================
17 #include <linux/ctype.h>
18 #include <linux/module.h>
19 #include <linux/moduleparam.h>
21 /* Version Information */
22 #define DRIVER_AUTHOR "Hansjoerg Lipp <hjlipp@web.de>, Tilman Schmidt <tilman@imap.cc>, Stefan Eilers"
23 #define DRIVER_DESC "Driver for Gigaset 307x"
25 #ifdef CONFIG_GIGASET_DEBUG
26 #define DRIVER_DESC_DEBUG " (debug build)"
28 #define DRIVER_DESC_DEBUG ""
31 /* Module parameters */
32 int gigaset_debuglevel;
33 EXPORT_SYMBOL_GPL(gigaset_debuglevel);
34 module_param_named(debug, gigaset_debuglevel, int, S_IRUGO|S_IWUSR);
35 MODULE_PARM_DESC(debug, "debug level");
37 /* driver state flags */
38 #define VALID_MINOR 0x01
42 * gigaset_dbg_buffer() - dump data in ASCII and hex for debugging
43 * @level: debugging level.
44 * @msg: message prefix.
45 * @len: number of bytes to dump.
48 * If the current debugging level includes one of the bits set in @level,
49 * @len bytes starting at @buf are logged to dmesg at KERN_DEBUG prio,
50 * prefixed by the text @msg.
52 void gigaset_dbg_buffer(enum debuglevel level, const unsigned char *msg,
53 size_t len, const unsigned char *buf)
55 unsigned char outbuf[80];
57 size_t space = sizeof outbuf - 1;
58 unsigned char *out = outbuf;
63 if (c == '~' || c == '^' || c == '\\') {
74 if (c < 0x20 || c == 0x7f) {
86 gig_dbg(level, "%s (%u bytes): %s", msg, (unsigned) len, outbuf);
88 EXPORT_SYMBOL_GPL(gigaset_dbg_buffer);
90 static int setflags(struct cardstate *cs, unsigned flags, unsigned delay)
94 r = cs->ops->set_modem_ctrl(cs, cs->control_state, flags);
95 cs->control_state = flags;
100 set_current_state(TASK_INTERRUPTIBLE);
101 schedule_timeout(delay * HZ / 1000);
107 int gigaset_enterconfigmode(struct cardstate *cs)
111 cs->control_state = TIOCM_RTS;
113 r = setflags(cs, TIOCM_DTR, 200);
116 r = setflags(cs, 0, 200);
119 for (i = 0; i < 5; ++i) {
120 r = setflags(cs, TIOCM_RTS, 100);
123 r = setflags(cs, 0, 100);
127 r = setflags(cs, TIOCM_RTS|TIOCM_DTR, 800);
134 dev_err(cs->dev, "error %d on setuartbits\n", -r);
135 cs->control_state = TIOCM_RTS|TIOCM_DTR;
136 cs->ops->set_modem_ctrl(cs, 0, TIOCM_RTS|TIOCM_DTR);
141 static int test_timeout(struct at_state_t *at_state)
143 if (!at_state->timer_expires)
146 if (--at_state->timer_expires) {
147 gig_dbg(DEBUG_MCMD, "decreased timer of %p to %lu",
148 at_state, at_state->timer_expires);
152 if (!gigaset_add_event(at_state->cs, at_state, EV_TIMEOUT, NULL,
153 at_state->timer_index, NULL))
154 dev_err(at_state->cs->dev, "%s: out of memory\n",
159 static void timer_tick(unsigned long data)
161 struct cardstate *cs = (struct cardstate *) data;
164 struct at_state_t *at_state;
167 spin_lock_irqsave(&cs->lock, flags);
169 for (channel = 0; channel < cs->channels; ++channel)
170 if (test_timeout(&cs->bcs[channel].at_state))
173 if (test_timeout(&cs->at_state))
176 list_for_each_entry(at_state, &cs->temp_at_states, list)
177 if (test_timeout(at_state))
181 mod_timer(&cs->timer, jiffies + msecs_to_jiffies(GIG_TICK));
183 gig_dbg(DEBUG_CMD, "scheduling timeout");
184 tasklet_schedule(&cs->event_tasklet);
188 spin_unlock_irqrestore(&cs->lock, flags);
191 int gigaset_get_channel(struct bc_state *bcs)
195 spin_lock_irqsave(&bcs->cs->lock, flags);
196 if (bcs->use_count || !try_module_get(bcs->cs->driver->owner)) {
197 gig_dbg(DEBUG_ANY, "could not allocate channel %d",
199 spin_unlock_irqrestore(&bcs->cs->lock, flags);
204 gig_dbg(DEBUG_ANY, "allocated channel %d", bcs->channel);
205 spin_unlock_irqrestore(&bcs->cs->lock, flags);
209 struct bc_state *gigaset_get_free_channel(struct cardstate *cs)
214 spin_lock_irqsave(&cs->lock, flags);
215 if (!try_module_get(cs->driver->owner)) {
217 "could not get module for allocating channel");
218 spin_unlock_irqrestore(&cs->lock, flags);
221 for (i = 0; i < cs->channels; ++i)
222 if (!cs->bcs[i].use_count) {
223 ++cs->bcs[i].use_count;
225 spin_unlock_irqrestore(&cs->lock, flags);
226 gig_dbg(DEBUG_ANY, "allocated channel %d", i);
229 module_put(cs->driver->owner);
230 spin_unlock_irqrestore(&cs->lock, flags);
231 gig_dbg(DEBUG_ANY, "no free channel");
235 void gigaset_free_channel(struct bc_state *bcs)
239 spin_lock_irqsave(&bcs->cs->lock, flags);
241 gig_dbg(DEBUG_ANY, "could not free channel %d", bcs->channel);
242 spin_unlock_irqrestore(&bcs->cs->lock, flags);
247 module_put(bcs->cs->driver->owner);
248 gig_dbg(DEBUG_ANY, "freed channel %d", bcs->channel);
249 spin_unlock_irqrestore(&bcs->cs->lock, flags);
252 int gigaset_get_channels(struct cardstate *cs)
257 spin_lock_irqsave(&cs->lock, flags);
258 for (i = 0; i < cs->channels; ++i)
259 if (cs->bcs[i].use_count) {
260 spin_unlock_irqrestore(&cs->lock, flags);
261 gig_dbg(DEBUG_ANY, "could not allocate all channels");
264 for (i = 0; i < cs->channels; ++i)
265 ++cs->bcs[i].use_count;
266 spin_unlock_irqrestore(&cs->lock, flags);
268 gig_dbg(DEBUG_ANY, "allocated all channels");
273 void gigaset_free_channels(struct cardstate *cs)
278 gig_dbg(DEBUG_ANY, "unblocking all channels");
279 spin_lock_irqsave(&cs->lock, flags);
280 for (i = 0; i < cs->channels; ++i)
281 --cs->bcs[i].use_count;
282 spin_unlock_irqrestore(&cs->lock, flags);
285 void gigaset_block_channels(struct cardstate *cs)
290 gig_dbg(DEBUG_ANY, "blocking all channels");
291 spin_lock_irqsave(&cs->lock, flags);
292 for (i = 0; i < cs->channels; ++i)
293 ++cs->bcs[i].use_count;
294 spin_unlock_irqrestore(&cs->lock, flags);
297 static void clear_events(struct cardstate *cs)
303 spin_lock_irqsave(&cs->ev_lock, flags);
308 while (tail != head) {
309 ev = cs->events + head;
311 head = (head + 1) % MAX_EVENTS;
316 spin_unlock_irqrestore(&cs->ev_lock, flags);
320 * gigaset_add_event() - add event to device event queue
321 * @cs: device descriptor structure.
322 * @at_state: connection state structure.
324 * @ptr: pointer parameter for event.
325 * @parameter: integer parameter for event.
326 * @arg: pointer parameter for event.
328 * Allocate an event queue entry from the device's event queue, and set it up
329 * with the parameters given.
331 * Return value: added event
333 struct event_t *gigaset_add_event(struct cardstate *cs,
334 struct at_state_t *at_state, int type,
335 void *ptr, int parameter, void *arg)
339 struct event_t *event = NULL;
341 spin_lock_irqsave(&cs->ev_lock, flags);
344 next = (tail + 1) % MAX_EVENTS;
345 if (unlikely(next == cs->ev_head))
346 dev_err(cs->dev, "event queue full\n");
348 event = cs->events + tail;
350 event->at_state = at_state;
354 event->parameter = parameter;
358 spin_unlock_irqrestore(&cs->ev_lock, flags);
362 EXPORT_SYMBOL_GPL(gigaset_add_event);
364 static void free_strings(struct at_state_t *at_state)
368 for (i = 0; i < STR_NUM; ++i) {
369 kfree(at_state->str_var[i]);
370 at_state->str_var[i] = NULL;
374 static void clear_at_state(struct at_state_t *at_state)
376 free_strings(at_state);
379 static void dealloc_at_states(struct cardstate *cs)
381 struct at_state_t *cur, *next;
383 list_for_each_entry_safe(cur, next, &cs->temp_at_states, list) {
384 list_del(&cur->list);
390 static void gigaset_freebcs(struct bc_state *bcs)
394 gig_dbg(DEBUG_INIT, "freeing bcs[%d]->hw", bcs->channel);
395 if (!bcs->cs->ops->freebcshw(bcs))
396 gig_dbg(DEBUG_INIT, "failed");
398 gig_dbg(DEBUG_INIT, "clearing bcs[%d]->at_state", bcs->channel);
399 clear_at_state(&bcs->at_state);
400 gig_dbg(DEBUG_INIT, "freeing bcs[%d]->skb", bcs->channel);
401 dev_kfree_skb(bcs->skb);
404 for (i = 0; i < AT_NUM; ++i) {
405 kfree(bcs->commands[i]);
406 bcs->commands[i] = NULL;
410 static struct cardstate *alloc_cs(struct gigaset_driver *drv)
414 struct cardstate *cs;
415 struct cardstate *ret = NULL;
417 spin_lock_irqsave(&drv->lock, flags);
420 for (i = 0; i < drv->minors; ++i) {
422 if (!(cs->flags & VALID_MINOR)) {
423 cs->flags = VALID_MINOR;
429 spin_unlock_irqrestore(&drv->lock, flags);
433 static void free_cs(struct cardstate *cs)
438 static void make_valid(struct cardstate *cs, unsigned mask)
441 struct gigaset_driver *drv = cs->driver;
442 spin_lock_irqsave(&drv->lock, flags);
444 spin_unlock_irqrestore(&drv->lock, flags);
447 static void make_invalid(struct cardstate *cs, unsigned mask)
450 struct gigaset_driver *drv = cs->driver;
451 spin_lock_irqsave(&drv->lock, flags);
453 spin_unlock_irqrestore(&drv->lock, flags);
457 * gigaset_freecs() - free all associated ressources of a device
458 * @cs: device descriptor structure.
460 * Stops all tasklets and timers, unregisters the device from all
461 * subsystems it was registered to, deallocates the device structure
462 * @cs and all structures referenced from it.
463 * Operations on the device should be stopped before calling this.
465 void gigaset_freecs(struct cardstate *cs)
473 mutex_lock(&cs->mutex);
480 spin_lock_irqsave(&cs->lock, flags);
482 spin_unlock_irqrestore(&cs->lock, flags); /* event handler and timer are
483 not rescheduled below */
485 tasklet_kill(&cs->event_tasklet);
486 del_timer_sync(&cs->timer);
488 switch (cs->cs_init) {
490 /* clear B channel structures */
491 for (i = 0; i < cs->channels; ++i) {
492 gig_dbg(DEBUG_INIT, "clearing bcs[%d]", i);
493 gigaset_freebcs(cs->bcs + i);
496 /* clear device sysfs */
497 gigaset_free_dev_sysfs(cs);
501 gig_dbg(DEBUG_INIT, "clearing hw");
502 cs->ops->freecshw(cs);
505 case 2: /* error in initcshw */
506 /* Deregister from LL */
507 make_invalid(cs, VALID_ID);
508 gigaset_isdn_unregister(cs);
511 case 1: /* error when registering to LL */
512 gig_dbg(DEBUG_INIT, "clearing at_state");
513 clear_at_state(&cs->at_state);
514 dealloc_at_states(cs);
517 case 0: /* error in basic setup */
519 gig_dbg(DEBUG_INIT, "freeing inbuf");
522 f_bcs: gig_dbg(DEBUG_INIT, "freeing bcs[]");
524 f_cs: gig_dbg(DEBUG_INIT, "freeing cs");
525 mutex_unlock(&cs->mutex);
528 EXPORT_SYMBOL_GPL(gigaset_freecs);
530 void gigaset_at_init(struct at_state_t *at_state, struct bc_state *bcs,
531 struct cardstate *cs, int cid)
535 INIT_LIST_HEAD(&at_state->list);
536 at_state->waiting = 0;
537 at_state->getstring = 0;
538 at_state->pending_commands = 0;
539 at_state->timer_expires = 0;
540 at_state->timer_active = 0;
541 at_state->timer_index = 0;
542 at_state->seq_index = 0;
543 at_state->ConState = 0;
544 for (i = 0; i < STR_NUM; ++i)
545 at_state->str_var[i] = NULL;
546 at_state->int_var[VAR_ZDLE] = 0;
547 at_state->int_var[VAR_ZCTP] = -1;
548 at_state->int_var[VAR_ZSAU] = ZSAU_NULL;
553 at_state->replystruct = cs->tabnocid;
555 at_state->replystruct = cs->tabcid;
559 static void gigaset_inbuf_init(struct inbuf_t *inbuf, struct cardstate *cs)
560 /* inbuf->read must be allocated before! */
565 inbuf->inputstate = INS_command;
569 * gigaset_fill_inbuf() - append received data to input buffer
570 * @inbuf: buffer structure.
571 * @src: received data.
572 * @numbytes: number of bytes received.
574 int gigaset_fill_inbuf(struct inbuf_t *inbuf, const unsigned char *src,
577 unsigned n, head, tail, bytesleft;
579 gig_dbg(DEBUG_INTR, "received %u bytes", numbytes);
584 bytesleft = numbytes;
587 gig_dbg(DEBUG_INTR, "buffer state: %u -> %u", head, tail);
593 n = (RBUFSIZE-1) - tail;
597 dev_err(inbuf->cs->dev,
598 "buffer overflow (%u bytes lost)\n",
604 memcpy(inbuf->data + tail, src, n);
606 tail = (tail + n) % RBUFSIZE;
609 gig_dbg(DEBUG_INTR, "setting tail to %u", tail);
611 return numbytes != bytesleft;
613 EXPORT_SYMBOL_GPL(gigaset_fill_inbuf);
615 /* Initialize the b-channel structure */
616 static struct bc_state *gigaset_initbcs(struct bc_state *bcs,
617 struct cardstate *cs, int channel)
623 skb_queue_head_init(&bcs->squeue);
629 gig_dbg(DEBUG_INIT, "setting up bcs[%d]->at_state", channel);
630 gigaset_at_init(&bcs->at_state, bcs, cs, -1);
632 #ifdef CONFIG_GIGASET_DEBUG
636 gig_dbg(DEBUG_INIT, "allocating bcs[%d]->skb", channel);
637 bcs->fcs = PPP_INITFCS;
639 if (cs->ignoreframes) {
642 bcs->skb = dev_alloc_skb(SBUFSIZE + cs->hw_hdr_len);
643 if (bcs->skb != NULL)
644 skb_reserve(bcs->skb, cs->hw_hdr_len);
646 pr_err("out of memory\n");
649 bcs->channel = channel;
655 bcs->ignore = cs->ignoreframes;
657 for (i = 0; i < AT_NUM; ++i)
658 bcs->commands[i] = NULL;
660 gig_dbg(DEBUG_INIT, " setting up bcs[%d]->hw", channel);
661 if (cs->ops->initbcshw(bcs))
664 gig_dbg(DEBUG_INIT, " failed");
666 gig_dbg(DEBUG_INIT, " freeing bcs[%d]->skb", channel);
667 dev_kfree_skb(bcs->skb);
674 * gigaset_initcs() - initialize device structure
675 * @drv: hardware driver the device belongs to
676 * @channels: number of B channels supported by device
677 * @onechannel: !=0 if B channel data and AT commands share one
678 * communication channel (M10x),
679 * ==0 if B channels have separate communication channels (base)
680 * @ignoreframes: number of frames to ignore after setting up B channel
681 * @cidmode: !=0: start in CallID mode
682 * @modulename: name of driver module for LL registration
684 * Allocate and initialize cardstate structure for Gigaset driver
685 * Calls hardware dependent gigaset_initcshw() function
686 * Calls B channel initialization function gigaset_initbcs() for each B channel
689 * pointer to cardstate structure
691 struct cardstate *gigaset_initcs(struct gigaset_driver *drv, int channels,
692 int onechannel, int ignoreframes,
693 int cidmode, const char *modulename)
695 struct cardstate *cs;
699 gig_dbg(DEBUG_INIT, "allocating cs");
702 pr_err("maximum number of devices exceeded\n");
706 gig_dbg(DEBUG_INIT, "allocating bcs[0..%d]", channels - 1);
707 cs->bcs = kmalloc(channels * sizeof(struct bc_state), GFP_KERNEL);
709 pr_err("out of memory\n");
712 gig_dbg(DEBUG_INIT, "allocating inbuf");
713 cs->inbuf = kmalloc(sizeof(struct inbuf_t), GFP_KERNEL);
715 pr_err("out of memory\n");
720 cs->channels = channels;
721 cs->onechannel = onechannel;
722 cs->ignoreframes = ignoreframes;
723 INIT_LIST_HEAD(&cs->temp_at_states);
725 init_timer(&cs->timer); /* clear next & prev */
726 spin_lock_init(&cs->ev_lock);
730 tasklet_init(&cs->event_tasklet, gigaset_handle_event,
732 cs->commands_pending = 0;
739 cs->cidmode = cidmode != 0;
740 cs->tabnocid = gigaset_tab_nocid;
741 cs->tabcid = gigaset_tab_cid;
743 init_waitqueue_head(&cs->waitqueue);
746 cs->mode = M_UNKNOWN;
747 cs->mstate = MS_UNINITIALIZED;
751 gig_dbg(DEBUG_INIT, "setting up at_state");
752 spin_lock_init(&cs->lock);
753 gigaset_at_init(&cs->at_state, NULL, cs, 0);
757 gig_dbg(DEBUG_INIT, "setting up inbuf");
758 gigaset_inbuf_init(cs->inbuf, cs);
763 gig_dbg(DEBUG_INIT, "setting up cmdbuf");
764 cs->cmdbuf = cs->lastcmdbuf = NULL;
765 spin_lock_init(&cs->cmdlock);
769 gig_dbg(DEBUG_INIT, "setting up iif");
770 if (!gigaset_isdn_register(cs, modulename)) {
771 pr_err("error registering ISDN device\n");
775 make_valid(cs, VALID_ID);
777 gig_dbg(DEBUG_INIT, "setting up hw");
778 if (!cs->ops->initcshw(cs))
783 /* set up character device */
786 /* set up device sysfs */
787 gigaset_init_dev_sysfs(cs);
789 /* set up channel data structures */
790 for (i = 0; i < channels; ++i) {
791 gig_dbg(DEBUG_INIT, "setting up bcs[%d]", i);
792 if (!gigaset_initbcs(cs->bcs + i, cs, i)) {
793 pr_err("could not allocate channel %d data\n", i);
798 spin_lock_irqsave(&cs->lock, flags);
800 spin_unlock_irqrestore(&cs->lock, flags);
801 setup_timer(&cs->timer, timer_tick, (unsigned long) cs);
802 cs->timer.expires = jiffies + msecs_to_jiffies(GIG_TICK);
803 /* FIXME: can jiffies increase too much until the timer is added?
804 * Same problem(?) with mod_timer() in timer_tick(). */
805 add_timer(&cs->timer);
807 gig_dbg(DEBUG_INIT, "cs initialized");
811 gig_dbg(DEBUG_INIT, "failed");
815 EXPORT_SYMBOL_GPL(gigaset_initcs);
817 /* ReInitialize the b-channel structure on hangup */
818 void gigaset_bcs_reinit(struct bc_state *bcs)
821 struct cardstate *cs = bcs->cs;
824 while ((skb = skb_dequeue(&bcs->squeue)) != NULL)
827 spin_lock_irqsave(&cs->lock, flags);
828 clear_at_state(&bcs->at_state);
829 bcs->at_state.ConState = 0;
830 bcs->at_state.timer_active = 0;
831 bcs->at_state.timer_expires = 0;
832 bcs->at_state.cid = -1; /* No CID defined */
833 spin_unlock_irqrestore(&cs->lock, flags);
837 #ifdef CONFIG_GIGASET_DEBUG
841 bcs->fcs = PPP_INITFCS;
844 bcs->ignore = cs->ignoreframes;
846 dev_kfree_skb(bcs->skb);
850 cs->ops->reinitbcshw(bcs);
853 static void cleanup_cs(struct cardstate *cs)
855 struct cmdbuf_t *cb, *tcb;
859 spin_lock_irqsave(&cs->lock, flags);
861 cs->mode = M_UNKNOWN;
862 cs->mstate = MS_UNINITIALIZED;
864 clear_at_state(&cs->at_state);
865 dealloc_at_states(cs);
866 free_strings(&cs->at_state);
867 gigaset_at_init(&cs->at_state, NULL, cs, 0);
869 cs->inbuf->inputstate = INS_command;
879 cs->cmdbuf = cs->lastcmdbuf = NULL;
885 cs->commands_pending = 0;
888 spin_unlock_irqrestore(&cs->lock, flags);
890 for (i = 0; i < cs->channels; ++i) {
891 gigaset_freebcs(cs->bcs + i);
892 if (!gigaset_initbcs(cs->bcs + i, cs, i))
893 pr_err("could not allocate channel %d data\n", i);
897 cs->cmd_result = -ENODEV;
899 wake_up_interruptible(&cs->waitqueue);
905 * gigaset_start() - start device operations
906 * @cs: device descriptor structure.
908 * Prepares the device for use by setting up communication parameters,
909 * scheduling an EV_START event to initiate device initialization, and
910 * waiting for completion of the initialization.
913 * 1 - success, 0 - error
915 int gigaset_start(struct cardstate *cs)
919 if (mutex_lock_interruptible(&cs->mutex))
922 spin_lock_irqsave(&cs->lock, flags);
924 spin_unlock_irqrestore(&cs->lock, flags);
926 if (cs->mstate != MS_LOCKED) {
927 cs->ops->set_modem_ctrl(cs, 0, TIOCM_DTR|TIOCM_RTS);
928 cs->ops->baud_rate(cs, B115200);
929 cs->ops->set_line_ctrl(cs, CS8);
930 cs->control_state = TIOCM_DTR|TIOCM_RTS;
935 if (!gigaset_add_event(cs, &cs->at_state, EV_START, NULL, 0, NULL)) {
937 dev_err(cs->dev, "%s: out of memory\n", __func__);
941 gig_dbg(DEBUG_CMD, "scheduling START");
942 gigaset_schedule_event(cs);
944 wait_event(cs->waitqueue, !cs->waiting);
946 mutex_unlock(&cs->mutex);
950 mutex_unlock(&cs->mutex);
953 EXPORT_SYMBOL_GPL(gigaset_start);
956 * gigaset_shutdown() - shut down device operations
957 * @cs: device descriptor structure.
959 * Deactivates the device by scheduling an EV_SHUTDOWN event and
960 * waiting for completion of the shutdown.
963 * 0 - success, -1 - error (no device associated)
965 int gigaset_shutdown(struct cardstate *cs)
967 mutex_lock(&cs->mutex);
969 if (!(cs->flags & VALID_MINOR)) {
970 mutex_unlock(&cs->mutex);
976 if (!gigaset_add_event(cs, &cs->at_state, EV_SHUTDOWN, NULL, 0, NULL)) {
977 dev_err(cs->dev, "%s: out of memory\n", __func__);
981 gig_dbg(DEBUG_CMD, "scheduling SHUTDOWN");
982 gigaset_schedule_event(cs);
984 wait_event(cs->waitqueue, !cs->waiting);
989 mutex_unlock(&cs->mutex);
992 EXPORT_SYMBOL_GPL(gigaset_shutdown);
995 * gigaset_stop() - stop device operations
996 * @cs: device descriptor structure.
998 * Stops operations on the device by scheduling an EV_STOP event and
999 * waiting for completion of the shutdown.
1001 void gigaset_stop(struct cardstate *cs)
1003 mutex_lock(&cs->mutex);
1007 if (!gigaset_add_event(cs, &cs->at_state, EV_STOP, NULL, 0, NULL)) {
1008 dev_err(cs->dev, "%s: out of memory\n", __func__);
1012 gig_dbg(DEBUG_CMD, "scheduling STOP");
1013 gigaset_schedule_event(cs);
1015 wait_event(cs->waitqueue, !cs->waiting);
1020 mutex_unlock(&cs->mutex);
1022 EXPORT_SYMBOL_GPL(gigaset_stop);
1024 static LIST_HEAD(drivers);
1025 static DEFINE_SPINLOCK(driver_lock);
1027 struct cardstate *gigaset_get_cs_by_id(int id)
1029 unsigned long flags;
1030 struct cardstate *ret = NULL;
1031 struct cardstate *cs;
1032 struct gigaset_driver *drv;
1035 spin_lock_irqsave(&driver_lock, flags);
1036 list_for_each_entry(drv, &drivers, list) {
1037 spin_lock(&drv->lock);
1038 for (i = 0; i < drv->minors; ++i) {
1040 if ((cs->flags & VALID_ID) && cs->myid == id) {
1045 spin_unlock(&drv->lock);
1049 spin_unlock_irqrestore(&driver_lock, flags);
1053 void gigaset_debugdrivers(void)
1055 unsigned long flags;
1056 static struct cardstate *cs;
1057 struct gigaset_driver *drv;
1060 spin_lock_irqsave(&driver_lock, flags);
1061 list_for_each_entry(drv, &drivers, list) {
1062 gig_dbg(DEBUG_DRIVER, "driver %p", drv);
1063 spin_lock(&drv->lock);
1064 for (i = 0; i < drv->minors; ++i) {
1065 gig_dbg(DEBUG_DRIVER, " index %u", i);
1067 gig_dbg(DEBUG_DRIVER, " cardstate %p", cs);
1068 gig_dbg(DEBUG_DRIVER, " flags 0x%02x", cs->flags);
1069 gig_dbg(DEBUG_DRIVER, " minor_index %u",
1071 gig_dbg(DEBUG_DRIVER, " driver %p", cs->driver);
1072 gig_dbg(DEBUG_DRIVER, " i4l id %d", cs->myid);
1074 spin_unlock(&drv->lock);
1076 spin_unlock_irqrestore(&driver_lock, flags);
1079 static struct cardstate *gigaset_get_cs_by_minor(unsigned minor)
1081 unsigned long flags;
1082 struct cardstate *ret = NULL;
1083 struct gigaset_driver *drv;
1086 spin_lock_irqsave(&driver_lock, flags);
1087 list_for_each_entry(drv, &drivers, list) {
1088 if (minor < drv->minor || minor >= drv->minor + drv->minors)
1090 index = minor - drv->minor;
1091 spin_lock(&drv->lock);
1092 if (drv->cs[index].flags & VALID_MINOR)
1093 ret = drv->cs + index;
1094 spin_unlock(&drv->lock);
1098 spin_unlock_irqrestore(&driver_lock, flags);
1102 struct cardstate *gigaset_get_cs_by_tty(struct tty_struct *tty)
1104 if (tty->index < 0 || tty->index >= tty->driver->num)
1106 return gigaset_get_cs_by_minor(tty->index + tty->driver->minor_start);
1110 * gigaset_freedriver() - free all associated ressources of a driver
1111 * @drv: driver descriptor structure.
1113 * Unregisters the driver from the system and deallocates the driver
1114 * structure @drv and all structures referenced from it.
1115 * All devices should be shut down before calling this.
1117 void gigaset_freedriver(struct gigaset_driver *drv)
1119 unsigned long flags;
1121 spin_lock_irqsave(&driver_lock, flags);
1122 list_del(&drv->list);
1123 spin_unlock_irqrestore(&driver_lock, flags);
1125 gigaset_if_freedriver(drv);
1130 EXPORT_SYMBOL_GPL(gigaset_freedriver);
1133 * gigaset_initdriver() - initialize driver structure
1134 * @minor: First minor number
1135 * @minors: Number of minors this driver can handle
1136 * @procname: Name of the driver
1137 * @devname: Name of the device files (prefix without minor number)
1139 * Allocate and initialize gigaset_driver structure. Initialize interface.
1142 * Pointer to the gigaset_driver structure on success, NULL on failure.
1144 struct gigaset_driver *gigaset_initdriver(unsigned minor, unsigned minors,
1145 const char *procname,
1146 const char *devname,
1147 const struct gigaset_ops *ops,
1148 struct module *owner)
1150 struct gigaset_driver *drv;
1151 unsigned long flags;
1154 drv = kmalloc(sizeof *drv, GFP_KERNEL);
1160 drv->minors = minors;
1161 spin_lock_init(&drv->lock);
1165 INIT_LIST_HEAD(&drv->list);
1167 drv->cs = kmalloc(minors * sizeof *drv->cs, GFP_KERNEL);
1171 for (i = 0; i < minors; ++i) {
1172 drv->cs[i].flags = 0;
1173 drv->cs[i].driver = drv;
1174 drv->cs[i].ops = drv->ops;
1175 drv->cs[i].minor_index = i;
1176 mutex_init(&drv->cs[i].mutex);
1179 gigaset_if_initdriver(drv, procname, devname);
1181 spin_lock_irqsave(&driver_lock, flags);
1182 list_add(&drv->list, &drivers);
1183 spin_unlock_irqrestore(&driver_lock, flags);
1192 EXPORT_SYMBOL_GPL(gigaset_initdriver);
1195 * gigaset_blockdriver() - block driver
1196 * @drv: driver descriptor structure.
1198 * Prevents the driver from attaching new devices, in preparation for
1201 void gigaset_blockdriver(struct gigaset_driver *drv)
1205 EXPORT_SYMBOL_GPL(gigaset_blockdriver);
1207 static int __init gigaset_init_module(void)
1209 /* in accordance with the principle of least astonishment,
1210 * setting the 'debug' parameter to 1 activates a sensible
1211 * set of default debug levels
1213 if (gigaset_debuglevel == 1)
1214 gigaset_debuglevel = DEBUG_DEFAULT;
1216 pr_info(DRIVER_DESC DRIVER_DESC_DEBUG "\n");
1220 static void __exit gigaset_exit_module(void)
1224 module_init(gigaset_init_module);
1225 module_exit(gigaset_exit_module);
1227 MODULE_AUTHOR(DRIVER_AUTHOR);
1228 MODULE_DESCRIPTION(DRIVER_DESC);
1230 MODULE_LICENSE("GPL");