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 = DEBUG_DEFAULT;
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; //FIXME
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; // FIXME is this a good value?
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 //FIXME what should we do?
160 static void timer_tick(unsigned long data)
162 struct cardstate *cs = (struct cardstate *) data;
165 struct at_state_t *at_state;
168 spin_lock_irqsave(&cs->lock, flags);
170 for (channel = 0; channel < cs->channels; ++channel)
171 if (test_timeout(&cs->bcs[channel].at_state))
174 if (test_timeout(&cs->at_state))
177 list_for_each_entry(at_state, &cs->temp_at_states, list)
178 if (test_timeout(at_state))
182 mod_timer(&cs->timer, jiffies + msecs_to_jiffies(GIG_TICK));
184 gig_dbg(DEBUG_CMD, "scheduling timeout");
185 tasklet_schedule(&cs->event_tasklet);
189 spin_unlock_irqrestore(&cs->lock, flags);
192 int gigaset_get_channel(struct bc_state *bcs)
196 spin_lock_irqsave(&bcs->cs->lock, flags);
197 if (bcs->use_count || !try_module_get(bcs->cs->driver->owner)) {
198 gig_dbg(DEBUG_ANY, "could not allocate channel %d",
200 spin_unlock_irqrestore(&bcs->cs->lock, flags);
205 gig_dbg(DEBUG_ANY, "allocated channel %d", bcs->channel);
206 spin_unlock_irqrestore(&bcs->cs->lock, flags);
210 struct bc_state *gigaset_get_free_channel(struct cardstate *cs)
215 spin_lock_irqsave(&cs->lock, flags);
216 if (!try_module_get(cs->driver->owner)) {
218 "could not get module for allocating channel");
219 spin_unlock_irqrestore(&cs->lock, flags);
222 for (i = 0; i < cs->channels; ++i)
223 if (!cs->bcs[i].use_count) {
224 ++cs->bcs[i].use_count;
226 spin_unlock_irqrestore(&cs->lock, flags);
227 gig_dbg(DEBUG_ANY, "allocated channel %d", i);
230 module_put(cs->driver->owner);
231 spin_unlock_irqrestore(&cs->lock, flags);
232 gig_dbg(DEBUG_ANY, "no free channel");
236 void gigaset_free_channel(struct bc_state *bcs)
240 spin_lock_irqsave(&bcs->cs->lock, flags);
242 gig_dbg(DEBUG_ANY, "could not free channel %d", bcs->channel);
243 spin_unlock_irqrestore(&bcs->cs->lock, flags);
248 module_put(bcs->cs->driver->owner);
249 gig_dbg(DEBUG_ANY, "freed channel %d", bcs->channel);
250 spin_unlock_irqrestore(&bcs->cs->lock, flags);
253 int gigaset_get_channels(struct cardstate *cs)
258 spin_lock_irqsave(&cs->lock, flags);
259 for (i = 0; i < cs->channels; ++i)
260 if (cs->bcs[i].use_count) {
261 spin_unlock_irqrestore(&cs->lock, flags);
262 gig_dbg(DEBUG_ANY, "could not allocate all channels");
265 for (i = 0; i < cs->channels; ++i)
266 ++cs->bcs[i].use_count;
267 spin_unlock_irqrestore(&cs->lock, flags);
269 gig_dbg(DEBUG_ANY, "allocated all channels");
274 void gigaset_free_channels(struct cardstate *cs)
279 gig_dbg(DEBUG_ANY, "unblocking all channels");
280 spin_lock_irqsave(&cs->lock, flags);
281 for (i = 0; i < cs->channels; ++i)
282 --cs->bcs[i].use_count;
283 spin_unlock_irqrestore(&cs->lock, flags);
286 void gigaset_block_channels(struct cardstate *cs)
291 gig_dbg(DEBUG_ANY, "blocking all channels");
292 spin_lock_irqsave(&cs->lock, flags);
293 for (i = 0; i < cs->channels; ++i)
294 ++cs->bcs[i].use_count;
295 spin_unlock_irqrestore(&cs->lock, flags);
298 static void clear_events(struct cardstate *cs)
304 spin_lock_irqsave(&cs->ev_lock, flags);
309 while (tail != head) {
310 ev = cs->events + head;
312 head = (head + 1) % MAX_EVENTS;
317 spin_unlock_irqrestore(&cs->ev_lock, flags);
321 * gigaset_add_event() - add event to device event queue
322 * @cs: device descriptor structure.
323 * @at_state: connection state structure.
325 * @ptr: pointer parameter for event.
326 * @parameter: integer parameter for event.
327 * @arg: pointer parameter for event.
329 * Allocate an event queue entry from the device's event queue, and set it up
330 * with the parameters given.
332 * Return value: added event
334 struct event_t *gigaset_add_event(struct cardstate *cs,
335 struct at_state_t *at_state, int type,
336 void *ptr, int parameter, void *arg)
340 struct event_t *event = NULL;
342 spin_lock_irqsave(&cs->ev_lock, flags);
345 next = (tail + 1) % MAX_EVENTS;
346 if (unlikely(next == cs->ev_head))
347 dev_err(cs->dev, "event queue full\n");
349 event = cs->events + tail;
351 event->at_state = at_state;
355 event->parameter = parameter;
359 spin_unlock_irqrestore(&cs->ev_lock, flags);
363 EXPORT_SYMBOL_GPL(gigaset_add_event);
365 static void free_strings(struct at_state_t *at_state)
369 for (i = 0; i < STR_NUM; ++i) {
370 kfree(at_state->str_var[i]);
371 at_state->str_var[i] = NULL;
375 static void clear_at_state(struct at_state_t *at_state)
377 free_strings(at_state);
380 static void dealloc_at_states(struct cardstate *cs)
382 struct at_state_t *cur, *next;
384 list_for_each_entry_safe(cur, next, &cs->temp_at_states, list) {
385 list_del(&cur->list);
391 static void gigaset_freebcs(struct bc_state *bcs)
395 gig_dbg(DEBUG_INIT, "freeing bcs[%d]->hw", bcs->channel);
396 if (!bcs->cs->ops->freebcshw(bcs)) {
397 gig_dbg(DEBUG_INIT, "failed");
400 gig_dbg(DEBUG_INIT, "clearing bcs[%d]->at_state", bcs->channel);
401 clear_at_state(&bcs->at_state);
402 gig_dbg(DEBUG_INIT, "freeing bcs[%d]->skb", bcs->channel);
405 dev_kfree_skb(bcs->skb);
406 for (i = 0; i < AT_NUM; ++i) {
407 kfree(bcs->commands[i]);
408 bcs->commands[i] = NULL;
412 static struct cardstate *alloc_cs(struct gigaset_driver *drv)
416 struct cardstate *cs;
417 struct cardstate *ret = NULL;
419 spin_lock_irqsave(&drv->lock, flags);
422 for (i = 0; i < drv->minors; ++i) {
424 if (!(cs->flags & VALID_MINOR)) {
425 cs->flags = VALID_MINOR;
431 spin_unlock_irqrestore(&drv->lock, flags);
435 static void free_cs(struct cardstate *cs)
440 static void make_valid(struct cardstate *cs, unsigned mask)
443 struct gigaset_driver *drv = cs->driver;
444 spin_lock_irqsave(&drv->lock, flags);
446 spin_unlock_irqrestore(&drv->lock, flags);
449 static void make_invalid(struct cardstate *cs, unsigned mask)
452 struct gigaset_driver *drv = cs->driver;
453 spin_lock_irqsave(&drv->lock, flags);
455 spin_unlock_irqrestore(&drv->lock, flags);
459 * gigaset_freecs() - free all associated ressources of a device
460 * @cs: device descriptor structure.
462 * Stops all tasklets and timers, unregisters the device from all
463 * subsystems it was registered to, deallocates the device structure
464 * @cs and all structures referenced from it.
465 * Operations on the device should be stopped before calling this.
467 void gigaset_freecs(struct cardstate *cs)
475 mutex_lock(&cs->mutex);
482 spin_lock_irqsave(&cs->lock, flags);
484 spin_unlock_irqrestore(&cs->lock, flags); /* event handler and timer are
485 not rescheduled below */
487 tasklet_kill(&cs->event_tasklet);
488 del_timer_sync(&cs->timer);
490 switch (cs->cs_init) {
492 /* clear B channel structures */
493 for (i = 0; i < cs->channels; ++i) {
494 gig_dbg(DEBUG_INIT, "clearing bcs[%d]", i);
495 gigaset_freebcs(cs->bcs + i);
498 /* clear device sysfs */
499 gigaset_free_dev_sysfs(cs);
503 gig_dbg(DEBUG_INIT, "clearing hw");
504 cs->ops->freecshw(cs);
509 case 2: /* error in initcshw */
510 /* Deregister from LL */
511 make_invalid(cs, VALID_ID);
512 gigaset_isdn_unregister(cs);
515 case 1: /* error when registering to LL */
516 gig_dbg(DEBUG_INIT, "clearing at_state");
517 clear_at_state(&cs->at_state);
518 dealloc_at_states(cs);
521 case 0: /* error in basic setup */
523 gig_dbg(DEBUG_INIT, "freeing inbuf");
526 f_bcs: gig_dbg(DEBUG_INIT, "freeing bcs[]");
528 f_cs: gig_dbg(DEBUG_INIT, "freeing cs");
529 mutex_unlock(&cs->mutex);
532 EXPORT_SYMBOL_GPL(gigaset_freecs);
534 void gigaset_at_init(struct at_state_t *at_state, struct bc_state *bcs,
535 struct cardstate *cs, int cid)
539 INIT_LIST_HEAD(&at_state->list);
540 at_state->waiting = 0;
541 at_state->getstring = 0;
542 at_state->pending_commands = 0;
543 at_state->timer_expires = 0;
544 at_state->timer_active = 0;
545 at_state->timer_index = 0;
546 at_state->seq_index = 0;
547 at_state->ConState = 0;
548 for (i = 0; i < STR_NUM; ++i)
549 at_state->str_var[i] = NULL;
550 at_state->int_var[VAR_ZDLE] = 0;
551 at_state->int_var[VAR_ZCTP] = -1;
552 at_state->int_var[VAR_ZSAU] = ZSAU_NULL;
557 at_state->replystruct = cs->tabnocid;
559 at_state->replystruct = cs->tabcid;
563 static void gigaset_inbuf_init(struct inbuf_t *inbuf, struct bc_state *bcs,
564 struct cardstate *cs, int inputstate)
565 /* inbuf->read must be allocated before! */
570 inbuf->bcs = bcs; /*base driver: NULL*/
571 inbuf->rcvbuf = NULL;
572 inbuf->inputstate = inputstate;
576 * gigaset_fill_inbuf() - append received data to input buffer
577 * @inbuf: buffer structure.
578 * @src: received data.
579 * @numbytes: number of bytes received.
581 int gigaset_fill_inbuf(struct inbuf_t *inbuf, const unsigned char *src,
584 unsigned n, head, tail, bytesleft;
586 gig_dbg(DEBUG_INTR, "received %u bytes", numbytes);
591 bytesleft = numbytes;
594 gig_dbg(DEBUG_INTR, "buffer state: %u -> %u", head, tail);
600 n = (RBUFSIZE-1) - tail;
604 dev_err(inbuf->cs->dev,
605 "buffer overflow (%u bytes lost)\n",
611 memcpy(inbuf->data + tail, src, n);
613 tail = (tail + n) % RBUFSIZE;
616 gig_dbg(DEBUG_INTR, "setting tail to %u", tail);
618 return numbytes != bytesleft;
620 EXPORT_SYMBOL_GPL(gigaset_fill_inbuf);
622 /* Initialize the b-channel structure */
623 static struct bc_state *gigaset_initbcs(struct bc_state *bcs,
624 struct cardstate *cs, int channel)
628 bcs->tx_skb = NULL; //FIXME -> hw part
630 skb_queue_head_init(&bcs->squeue);
636 gig_dbg(DEBUG_INIT, "setting up bcs[%d]->at_state", channel);
637 gigaset_at_init(&bcs->at_state, bcs, cs, -1);
639 #ifdef CONFIG_GIGASET_DEBUG
643 gig_dbg(DEBUG_INIT, "allocating bcs[%d]->skb", channel);
644 bcs->fcs = PPP_INITFCS;
646 if (cs->ignoreframes) {
647 bcs->inputstate |= INS_skip_frame;
650 bcs->skb = dev_alloc_skb(SBUFSIZE + cs->hw_hdr_len);
651 if (bcs->skb != NULL)
652 skb_reserve(bcs->skb, cs->hw_hdr_len);
654 pr_err("out of memory\n");
655 bcs->inputstate |= INS_skip_frame;
659 bcs->channel = channel;
665 bcs->ignore = cs->ignoreframes;
667 for (i = 0; i < AT_NUM; ++i)
668 bcs->commands[i] = NULL;
670 gig_dbg(DEBUG_INIT, " setting up bcs[%d]->hw", channel);
671 if (cs->ops->initbcshw(bcs))
674 gig_dbg(DEBUG_INIT, " failed");
676 gig_dbg(DEBUG_INIT, " freeing bcs[%d]->skb", channel);
678 dev_kfree_skb(bcs->skb);
684 * gigaset_initcs() - initialize device structure
685 * @drv: hardware driver the device belongs to
686 * @channels: number of B channels supported by device
687 * @onechannel: !=0 if B channel data and AT commands share one
688 * communication channel (M10x),
689 * ==0 if B channels have separate communication channels (base)
690 * @ignoreframes: number of frames to ignore after setting up B channel
691 * @cidmode: !=0: start in CallID mode
692 * @modulename: name of driver module for LL registration
694 * Allocate and initialize cardstate structure for Gigaset driver
695 * Calls hardware dependent gigaset_initcshw() function
696 * Calls B channel initialization function gigaset_initbcs() for each B channel
699 * pointer to cardstate structure
701 struct cardstate *gigaset_initcs(struct gigaset_driver *drv, int channels,
702 int onechannel, int ignoreframes,
703 int cidmode, const char *modulename)
705 struct cardstate *cs = NULL;
709 gig_dbg(DEBUG_INIT, "allocating cs");
710 if (!(cs = alloc_cs(drv))) {
711 pr_err("maximum number of devices exceeded\n");
715 gig_dbg(DEBUG_INIT, "allocating bcs[0..%d]", channels - 1);
716 cs->bcs = kmalloc(channels * sizeof(struct bc_state), GFP_KERNEL);
718 pr_err("out of memory\n");
721 gig_dbg(DEBUG_INIT, "allocating inbuf");
722 cs->inbuf = kmalloc(sizeof(struct inbuf_t), GFP_KERNEL);
724 pr_err("out of memory\n");
729 cs->channels = channels;
730 cs->onechannel = onechannel;
731 cs->ignoreframes = ignoreframes;
732 INIT_LIST_HEAD(&cs->temp_at_states);
734 init_timer(&cs->timer); /* clear next & prev */
735 spin_lock_init(&cs->ev_lock);
739 tasklet_init(&cs->event_tasklet, &gigaset_handle_event,
741 cs->commands_pending = 0;
748 cs->cidmode = cidmode != 0;
749 cs->tabnocid = gigaset_tab_nocid;
750 cs->tabcid = gigaset_tab_cid;
752 init_waitqueue_head(&cs->waitqueue);
755 cs->mode = M_UNKNOWN;
756 cs->mstate = MS_UNINITIALIZED;
760 gig_dbg(DEBUG_INIT, "setting up at_state");
761 spin_lock_init(&cs->lock);
762 gigaset_at_init(&cs->at_state, NULL, cs, 0);
766 gig_dbg(DEBUG_INIT, "setting up inbuf");
767 if (onechannel) { //FIXME distinction necessary?
768 gigaset_inbuf_init(cs->inbuf, cs->bcs, cs, INS_command);
770 gigaset_inbuf_init(cs->inbuf, NULL, cs, INS_command);
775 gig_dbg(DEBUG_INIT, "setting up cmdbuf");
776 cs->cmdbuf = cs->lastcmdbuf = NULL;
777 spin_lock_init(&cs->cmdlock);
781 gig_dbg(DEBUG_INIT, "setting up iif");
782 if (!gigaset_isdn_register(cs, modulename)) {
783 pr_err("error registering ISDN device\n");
787 make_valid(cs, VALID_ID);
789 gig_dbg(DEBUG_INIT, "setting up hw");
790 if (!cs->ops->initcshw(cs))
795 /* set up character device */
798 /* set up device sysfs */
799 gigaset_init_dev_sysfs(cs);
801 /* set up channel data structures */
802 for (i = 0; i < channels; ++i) {
803 gig_dbg(DEBUG_INIT, "setting up bcs[%d]", i);
804 if (!gigaset_initbcs(cs->bcs + i, cs, i)) {
805 pr_err("could not allocate channel %d data\n", i);
810 spin_lock_irqsave(&cs->lock, flags);
812 spin_unlock_irqrestore(&cs->lock, flags);
813 setup_timer(&cs->timer, timer_tick, (unsigned long) cs);
814 cs->timer.expires = jiffies + msecs_to_jiffies(GIG_TICK);
815 /* FIXME: can jiffies increase too much until the timer is added?
816 * Same problem(?) with mod_timer() in timer_tick(). */
817 add_timer(&cs->timer);
819 gig_dbg(DEBUG_INIT, "cs initialized");
823 gig_dbg(DEBUG_INIT, "failed");
827 EXPORT_SYMBOL_GPL(gigaset_initcs);
829 /* ReInitialize the b-channel structure on hangup */
830 void gigaset_bcs_reinit(struct bc_state *bcs)
833 struct cardstate *cs = bcs->cs;
836 while ((skb = skb_dequeue(&bcs->squeue)) != NULL)
839 spin_lock_irqsave(&cs->lock, flags);
840 clear_at_state(&bcs->at_state);
841 bcs->at_state.ConState = 0;
842 bcs->at_state.timer_active = 0;
843 bcs->at_state.timer_expires = 0;
844 bcs->at_state.cid = -1; /* No CID defined */
845 spin_unlock_irqrestore(&cs->lock, flags);
849 #ifdef CONFIG_GIGASET_DEBUG
853 bcs->fcs = PPP_INITFCS;
856 bcs->ignore = cs->ignoreframes;
858 bcs->inputstate |= INS_skip_frame;
861 cs->ops->reinitbcshw(bcs);
864 static void cleanup_cs(struct cardstate *cs)
866 struct cmdbuf_t *cb, *tcb;
870 spin_lock_irqsave(&cs->lock, flags);
872 cs->mode = M_UNKNOWN;
873 cs->mstate = MS_UNINITIALIZED;
875 clear_at_state(&cs->at_state);
876 dealloc_at_states(cs);
877 free_strings(&cs->at_state);
878 gigaset_at_init(&cs->at_state, NULL, cs, 0);
880 kfree(cs->inbuf->rcvbuf);
881 cs->inbuf->rcvbuf = NULL;
882 cs->inbuf->inputstate = INS_command;
892 cs->cmdbuf = cs->lastcmdbuf = NULL;
898 cs->commands_pending = 0;
901 spin_unlock_irqrestore(&cs->lock, flags);
903 for (i = 0; i < cs->channels; ++i) {
904 gigaset_freebcs(cs->bcs + i);
905 if (!gigaset_initbcs(cs->bcs + i, cs, i))
906 pr_err("could not allocate channel %d data\n", i);
910 cs->cmd_result = -ENODEV;
912 wake_up_interruptible(&cs->waitqueue);
918 * gigaset_start() - start device operations
919 * @cs: device descriptor structure.
921 * Prepares the device for use by setting up communication parameters,
922 * scheduling an EV_START event to initiate device initialization, and
923 * waiting for completion of the initialization.
926 * 1 - success, 0 - error
928 int gigaset_start(struct cardstate *cs)
932 if (mutex_lock_interruptible(&cs->mutex))
935 spin_lock_irqsave(&cs->lock, flags);
937 spin_unlock_irqrestore(&cs->lock, flags);
939 if (cs->mstate != MS_LOCKED) {
940 cs->ops->set_modem_ctrl(cs, 0, TIOCM_DTR|TIOCM_RTS);
941 cs->ops->baud_rate(cs, B115200);
942 cs->ops->set_line_ctrl(cs, CS8);
943 cs->control_state = TIOCM_DTR|TIOCM_RTS;
945 //FIXME use some saved values?
950 if (!gigaset_add_event(cs, &cs->at_state, EV_START, NULL, 0, NULL)) {
952 //FIXME what should we do?
956 gig_dbg(DEBUG_CMD, "scheduling START");
957 gigaset_schedule_event(cs);
959 wait_event(cs->waitqueue, !cs->waiting);
961 mutex_unlock(&cs->mutex);
965 mutex_unlock(&cs->mutex);
968 EXPORT_SYMBOL_GPL(gigaset_start);
971 * gigaset_shutdown() - shut down device operations
972 * @cs: device descriptor structure.
974 * Deactivates the device by scheduling an EV_SHUTDOWN event and
975 * waiting for completion of the shutdown.
978 * 0 - success, -1 - error (no device associated)
980 int gigaset_shutdown(struct cardstate *cs)
982 mutex_lock(&cs->mutex);
984 if (!(cs->flags & VALID_MINOR)) {
985 mutex_unlock(&cs->mutex);
991 if (!gigaset_add_event(cs, &cs->at_state, EV_SHUTDOWN, NULL, 0, NULL)) {
992 //FIXME what should we do?
996 gig_dbg(DEBUG_CMD, "scheduling SHUTDOWN");
997 gigaset_schedule_event(cs);
999 wait_event(cs->waitqueue, !cs->waiting);
1004 mutex_unlock(&cs->mutex);
1007 EXPORT_SYMBOL_GPL(gigaset_shutdown);
1010 * gigaset_stop() - stop device operations
1011 * @cs: device descriptor structure.
1013 * Stops operations on the device by scheduling an EV_STOP event and
1014 * waiting for completion of the shutdown.
1016 void gigaset_stop(struct cardstate *cs)
1018 mutex_lock(&cs->mutex);
1022 if (!gigaset_add_event(cs, &cs->at_state, EV_STOP, NULL, 0, NULL)) {
1023 //FIXME what should we do?
1027 gig_dbg(DEBUG_CMD, "scheduling STOP");
1028 gigaset_schedule_event(cs);
1030 wait_event(cs->waitqueue, !cs->waiting);
1035 mutex_unlock(&cs->mutex);
1037 EXPORT_SYMBOL_GPL(gigaset_stop);
1039 static LIST_HEAD(drivers);
1040 static DEFINE_SPINLOCK(driver_lock);
1042 struct cardstate *gigaset_get_cs_by_id(int id)
1044 unsigned long flags;
1045 struct cardstate *ret = NULL;
1046 struct cardstate *cs;
1047 struct gigaset_driver *drv;
1050 spin_lock_irqsave(&driver_lock, flags);
1051 list_for_each_entry(drv, &drivers, list) {
1052 spin_lock(&drv->lock);
1053 for (i = 0; i < drv->minors; ++i) {
1055 if ((cs->flags & VALID_ID) && cs->myid == id) {
1060 spin_unlock(&drv->lock);
1064 spin_unlock_irqrestore(&driver_lock, flags);
1068 void gigaset_debugdrivers(void)
1070 unsigned long flags;
1071 static struct cardstate *cs;
1072 struct gigaset_driver *drv;
1075 spin_lock_irqsave(&driver_lock, flags);
1076 list_for_each_entry(drv, &drivers, list) {
1077 gig_dbg(DEBUG_DRIVER, "driver %p", drv);
1078 spin_lock(&drv->lock);
1079 for (i = 0; i < drv->minors; ++i) {
1080 gig_dbg(DEBUG_DRIVER, " index %u", i);
1082 gig_dbg(DEBUG_DRIVER, " cardstate %p", cs);
1083 gig_dbg(DEBUG_DRIVER, " flags 0x%02x", cs->flags);
1084 gig_dbg(DEBUG_DRIVER, " minor_index %u",
1086 gig_dbg(DEBUG_DRIVER, " driver %p", cs->driver);
1087 gig_dbg(DEBUG_DRIVER, " i4l id %d", cs->myid);
1089 spin_unlock(&drv->lock);
1091 spin_unlock_irqrestore(&driver_lock, flags);
1094 static struct cardstate *gigaset_get_cs_by_minor(unsigned minor)
1096 unsigned long flags;
1097 struct cardstate *ret = NULL;
1098 struct gigaset_driver *drv;
1101 spin_lock_irqsave(&driver_lock, flags);
1102 list_for_each_entry(drv, &drivers, list) {
1103 if (minor < drv->minor || minor >= drv->minor + drv->minors)
1105 index = minor - drv->minor;
1106 spin_lock(&drv->lock);
1107 if (drv->cs[index].flags & VALID_MINOR)
1108 ret = drv->cs + index;
1109 spin_unlock(&drv->lock);
1113 spin_unlock_irqrestore(&driver_lock, flags);
1117 struct cardstate *gigaset_get_cs_by_tty(struct tty_struct *tty)
1119 if (tty->index < 0 || tty->index >= tty->driver->num)
1121 return gigaset_get_cs_by_minor(tty->index + tty->driver->minor_start);
1125 * gigaset_freedriver() - free all associated ressources of a driver
1126 * @drv: driver descriptor structure.
1128 * Unregisters the driver from the system and deallocates the driver
1129 * structure @drv and all structures referenced from it.
1130 * All devices should be shut down before calling this.
1132 void gigaset_freedriver(struct gigaset_driver *drv)
1134 unsigned long flags;
1136 spin_lock_irqsave(&driver_lock, flags);
1137 list_del(&drv->list);
1138 spin_unlock_irqrestore(&driver_lock, flags);
1140 gigaset_if_freedriver(drv);
1145 EXPORT_SYMBOL_GPL(gigaset_freedriver);
1148 * gigaset_initdriver() - initialize driver structure
1149 * @minor: First minor number
1150 * @minors: Number of minors this driver can handle
1151 * @procname: Name of the driver
1152 * @devname: Name of the device files (prefix without minor number)
1154 * Allocate and initialize gigaset_driver structure. Initialize interface.
1157 * Pointer to the gigaset_driver structure on success, NULL on failure.
1159 struct gigaset_driver *gigaset_initdriver(unsigned minor, unsigned minors,
1160 const char *procname,
1161 const char *devname,
1162 const struct gigaset_ops *ops,
1163 struct module *owner)
1165 struct gigaset_driver *drv;
1166 unsigned long flags;
1169 drv = kmalloc(sizeof *drv, GFP_KERNEL);
1175 drv->minors = minors;
1176 spin_lock_init(&drv->lock);
1180 INIT_LIST_HEAD(&drv->list);
1182 drv->cs = kmalloc(minors * sizeof *drv->cs, GFP_KERNEL);
1186 for (i = 0; i < minors; ++i) {
1187 drv->cs[i].flags = 0;
1188 drv->cs[i].driver = drv;
1189 drv->cs[i].ops = drv->ops;
1190 drv->cs[i].minor_index = i;
1191 mutex_init(&drv->cs[i].mutex);
1194 gigaset_if_initdriver(drv, procname, devname);
1196 spin_lock_irqsave(&driver_lock, flags);
1197 list_add(&drv->list, &drivers);
1198 spin_unlock_irqrestore(&driver_lock, flags);
1207 EXPORT_SYMBOL_GPL(gigaset_initdriver);
1210 * gigaset_blockdriver() - block driver
1211 * @drv: driver descriptor structure.
1213 * Prevents the driver from attaching new devices, in preparation for
1216 void gigaset_blockdriver(struct gigaset_driver *drv)
1220 EXPORT_SYMBOL_GPL(gigaset_blockdriver);
1222 static int __init gigaset_init_module(void)
1224 /* in accordance with the principle of least astonishment,
1225 * setting the 'debug' parameter to 1 activates a sensible
1226 * set of default debug levels
1228 if (gigaset_debuglevel == 1)
1229 gigaset_debuglevel = DEBUG_DEFAULT;
1231 pr_info(DRIVER_DESC DRIVER_DESC_DEBUG "\n");
1235 static void __exit gigaset_exit_module(void)
1239 module_init(gigaset_init_module);
1240 module_exit(gigaset_exit_module);
1242 MODULE_AUTHOR(DRIVER_AUTHOR);
1243 MODULE_DESCRIPTION(DRIVER_DESC);
1245 MODULE_LICENSE("GPL");