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 /* 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");
31 /* driver state flags */
32 #define VALID_MINOR 0x01
35 void gigaset_dbg_buffer(enum debuglevel level
, const unsigned char *msg
,
36 size_t len
, const unsigned char *buf
)
38 unsigned char outbuf
[80];
40 size_t space
= sizeof outbuf
- 1;
41 unsigned char *out
= outbuf
;
46 if (c
== '~' || c
== '^' || c
== '\\') {
57 if (c
< 0x20 || c
== 0x7f) {
69 gig_dbg(level
, "%s (%u bytes): %s", msg
, (unsigned) len
, outbuf
);
71 EXPORT_SYMBOL_GPL(gigaset_dbg_buffer
);
73 static int setflags(struct cardstate
*cs
, unsigned flags
, unsigned delay
)
77 r
= cs
->ops
->set_modem_ctrl(cs
, cs
->control_state
, flags
);
78 cs
->control_state
= flags
;
83 set_current_state(TASK_INTERRUPTIBLE
);
84 schedule_timeout(delay
* HZ
/ 1000);
90 int gigaset_enterconfigmode(struct cardstate
*cs
)
94 cs
->control_state
= TIOCM_RTS
; //FIXME
96 r
= setflags(cs
, TIOCM_DTR
, 200);
99 r
= setflags(cs
, 0, 200);
102 for (i
= 0; i
< 5; ++i
) {
103 r
= setflags(cs
, TIOCM_RTS
, 100);
106 r
= setflags(cs
, 0, 100);
110 r
= setflags(cs
, TIOCM_RTS
|TIOCM_DTR
, 800);
117 dev_err(cs
->dev
, "error %d on setuartbits\n", -r
);
118 cs
->control_state
= TIOCM_RTS
|TIOCM_DTR
; // FIXME is this a good value?
119 cs
->ops
->set_modem_ctrl(cs
, 0, TIOCM_RTS
|TIOCM_DTR
);
124 static int test_timeout(struct at_state_t
*at_state
)
126 if (!at_state
->timer_expires
)
129 if (--at_state
->timer_expires
) {
130 gig_dbg(DEBUG_MCMD
, "decreased timer of %p to %lu",
131 at_state
, at_state
->timer_expires
);
135 if (!gigaset_add_event(at_state
->cs
, at_state
, EV_TIMEOUT
, NULL
,
136 at_state
->timer_index
, NULL
)) {
137 //FIXME what should we do?
143 static void timer_tick(unsigned long data
)
145 struct cardstate
*cs
= (struct cardstate
*) data
;
148 struct at_state_t
*at_state
;
151 spin_lock_irqsave(&cs
->lock
, flags
);
153 for (channel
= 0; channel
< cs
->channels
; ++channel
)
154 if (test_timeout(&cs
->bcs
[channel
].at_state
))
157 if (test_timeout(&cs
->at_state
))
160 list_for_each_entry(at_state
, &cs
->temp_at_states
, list
)
161 if (test_timeout(at_state
))
165 mod_timer(&cs
->timer
, jiffies
+ msecs_to_jiffies(GIG_TICK
));
167 gig_dbg(DEBUG_CMD
, "scheduling timeout");
168 tasklet_schedule(&cs
->event_tasklet
);
172 spin_unlock_irqrestore(&cs
->lock
, flags
);
175 int gigaset_get_channel(struct bc_state
*bcs
)
179 spin_lock_irqsave(&bcs
->cs
->lock
, flags
);
180 if (bcs
->use_count
|| !try_module_get(bcs
->cs
->driver
->owner
)) {
181 gig_dbg(DEBUG_ANY
, "could not allocate channel %d",
183 spin_unlock_irqrestore(&bcs
->cs
->lock
, flags
);
188 gig_dbg(DEBUG_ANY
, "allocated channel %d", bcs
->channel
);
189 spin_unlock_irqrestore(&bcs
->cs
->lock
, flags
);
193 void gigaset_free_channel(struct bc_state
*bcs
)
197 spin_lock_irqsave(&bcs
->cs
->lock
, flags
);
199 gig_dbg(DEBUG_ANY
, "could not free channel %d", bcs
->channel
);
200 spin_unlock_irqrestore(&bcs
->cs
->lock
, flags
);
205 module_put(bcs
->cs
->driver
->owner
);
206 gig_dbg(DEBUG_ANY
, "freed channel %d", bcs
->channel
);
207 spin_unlock_irqrestore(&bcs
->cs
->lock
, flags
);
210 int gigaset_get_channels(struct cardstate
*cs
)
215 spin_lock_irqsave(&cs
->lock
, flags
);
216 for (i
= 0; i
< cs
->channels
; ++i
)
217 if (cs
->bcs
[i
].use_count
) {
218 spin_unlock_irqrestore(&cs
->lock
, flags
);
219 gig_dbg(DEBUG_ANY
, "could not allocate all channels");
222 for (i
= 0; i
< cs
->channels
; ++i
)
223 ++cs
->bcs
[i
].use_count
;
224 spin_unlock_irqrestore(&cs
->lock
, flags
);
226 gig_dbg(DEBUG_ANY
, "allocated all channels");
231 void gigaset_free_channels(struct cardstate
*cs
)
236 gig_dbg(DEBUG_ANY
, "unblocking all channels");
237 spin_lock_irqsave(&cs
->lock
, flags
);
238 for (i
= 0; i
< cs
->channels
; ++i
)
239 --cs
->bcs
[i
].use_count
;
240 spin_unlock_irqrestore(&cs
->lock
, flags
);
243 void gigaset_block_channels(struct cardstate
*cs
)
248 gig_dbg(DEBUG_ANY
, "blocking all channels");
249 spin_lock_irqsave(&cs
->lock
, flags
);
250 for (i
= 0; i
< cs
->channels
; ++i
)
251 ++cs
->bcs
[i
].use_count
;
252 spin_unlock_irqrestore(&cs
->lock
, flags
);
255 static void clear_events(struct cardstate
*cs
)
261 spin_lock_irqsave(&cs
->ev_lock
, flags
);
266 while (tail
!= head
) {
267 ev
= cs
->events
+ head
;
269 head
= (head
+ 1) % MAX_EVENTS
;
274 spin_unlock_irqrestore(&cs
->ev_lock
, flags
);
277 struct event_t
*gigaset_add_event(struct cardstate
*cs
,
278 struct at_state_t
*at_state
, int type
,
279 void *ptr
, int parameter
, void *arg
)
283 struct event_t
*event
= NULL
;
285 spin_lock_irqsave(&cs
->ev_lock
, flags
);
288 next
= (tail
+ 1) % MAX_EVENTS
;
289 if (unlikely(next
== cs
->ev_head
))
290 dev_err(cs
->dev
, "event queue full\n");
292 event
= cs
->events
+ tail
;
294 event
->at_state
= at_state
;
298 event
->parameter
= parameter
;
302 spin_unlock_irqrestore(&cs
->ev_lock
, flags
);
306 EXPORT_SYMBOL_GPL(gigaset_add_event
);
308 static void free_strings(struct at_state_t
*at_state
)
312 for (i
= 0; i
< STR_NUM
; ++i
) {
313 kfree(at_state
->str_var
[i
]);
314 at_state
->str_var
[i
] = NULL
;
318 static void clear_at_state(struct at_state_t
*at_state
)
320 free_strings(at_state
);
323 static void dealloc_at_states(struct cardstate
*cs
)
325 struct at_state_t
*cur
, *next
;
327 list_for_each_entry_safe(cur
, next
, &cs
->temp_at_states
, list
) {
328 list_del(&cur
->list
);
334 static void gigaset_freebcs(struct bc_state
*bcs
)
338 gig_dbg(DEBUG_INIT
, "freeing bcs[%d]->hw", bcs
->channel
);
339 if (!bcs
->cs
->ops
->freebcshw(bcs
)) {
340 gig_dbg(DEBUG_INIT
, "failed");
343 gig_dbg(DEBUG_INIT
, "clearing bcs[%d]->at_state", bcs
->channel
);
344 clear_at_state(&bcs
->at_state
);
345 gig_dbg(DEBUG_INIT
, "freeing bcs[%d]->skb", bcs
->channel
);
348 dev_kfree_skb(bcs
->skb
);
349 for (i
= 0; i
< AT_NUM
; ++i
) {
350 kfree(bcs
->commands
[i
]);
351 bcs
->commands
[i
] = NULL
;
355 static struct cardstate
*alloc_cs(struct gigaset_driver
*drv
)
359 struct cardstate
*cs
;
360 struct cardstate
*ret
= NULL
;
362 spin_lock_irqsave(&drv
->lock
, flags
);
365 for (i
= 0; i
< drv
->minors
; ++i
) {
367 if (!(cs
->flags
& VALID_MINOR
)) {
368 cs
->flags
= VALID_MINOR
;
374 spin_unlock_irqrestore(&drv
->lock
, flags
);
378 static void free_cs(struct cardstate
*cs
)
383 static void make_valid(struct cardstate
*cs
, unsigned mask
)
386 struct gigaset_driver
*drv
= cs
->driver
;
387 spin_lock_irqsave(&drv
->lock
, flags
);
389 spin_unlock_irqrestore(&drv
->lock
, flags
);
392 static void make_invalid(struct cardstate
*cs
, unsigned mask
)
395 struct gigaset_driver
*drv
= cs
->driver
;
396 spin_lock_irqsave(&drv
->lock
, flags
);
398 spin_unlock_irqrestore(&drv
->lock
, flags
);
401 void gigaset_freecs(struct cardstate
*cs
)
409 mutex_lock(&cs
->mutex
);
416 spin_lock_irqsave(&cs
->lock
, flags
);
418 spin_unlock_irqrestore(&cs
->lock
, flags
); /* event handler and timer are
419 not rescheduled below */
421 tasklet_kill(&cs
->event_tasklet
);
422 del_timer_sync(&cs
->timer
);
424 switch (cs
->cs_init
) {
426 /* clear device sysfs */
427 gigaset_free_dev_sysfs(cs
);
431 gig_dbg(DEBUG_INIT
, "clearing hw");
432 cs
->ops
->freecshw(cs
);
437 case 2: /* error in initcshw */
438 /* Deregister from LL */
439 make_invalid(cs
, VALID_ID
);
440 gig_dbg(DEBUG_INIT
, "clearing iif");
441 gigaset_i4l_cmd(cs
, ISDN_STAT_UNLOAD
);
444 case 1: /* error when regestering to LL */
445 gig_dbg(DEBUG_INIT
, "clearing at_state");
446 clear_at_state(&cs
->at_state
);
447 dealloc_at_states(cs
);
450 case 0: /* error in one call to initbcs */
451 for (i
= 0; i
< cs
->channels
; ++i
) {
452 gig_dbg(DEBUG_INIT
, "clearing bcs[%d]", i
);
453 gigaset_freebcs(cs
->bcs
+ i
);
457 gig_dbg(DEBUG_INIT
, "freeing inbuf");
460 f_bcs
: gig_dbg(DEBUG_INIT
, "freeing bcs[]");
462 f_cs
: gig_dbg(DEBUG_INIT
, "freeing cs");
463 mutex_unlock(&cs
->mutex
);
466 EXPORT_SYMBOL_GPL(gigaset_freecs
);
468 void gigaset_at_init(struct at_state_t
*at_state
, struct bc_state
*bcs
,
469 struct cardstate
*cs
, int cid
)
473 INIT_LIST_HEAD(&at_state
->list
);
474 at_state
->waiting
= 0;
475 at_state
->getstring
= 0;
476 at_state
->pending_commands
= 0;
477 at_state
->timer_expires
= 0;
478 at_state
->timer_active
= 0;
479 at_state
->timer_index
= 0;
480 at_state
->seq_index
= 0;
481 at_state
->ConState
= 0;
482 for (i
= 0; i
< STR_NUM
; ++i
)
483 at_state
->str_var
[i
] = NULL
;
484 at_state
->int_var
[VAR_ZDLE
] = 0;
485 at_state
->int_var
[VAR_ZCTP
] = -1;
486 at_state
->int_var
[VAR_ZSAU
] = ZSAU_NULL
;
491 at_state
->replystruct
= cs
->tabnocid
;
493 at_state
->replystruct
= cs
->tabcid
;
497 static void gigaset_inbuf_init(struct inbuf_t
*inbuf
, struct bc_state
*bcs
,
498 struct cardstate
*cs
, int inputstate
)
499 /* inbuf->read must be allocated before! */
504 inbuf
->bcs
= bcs
; /*base driver: NULL*/
505 inbuf
->rcvbuf
= NULL
;
506 inbuf
->inputstate
= inputstate
;
509 /* append received bytes to inbuf */
510 int gigaset_fill_inbuf(struct inbuf_t
*inbuf
, const unsigned char *src
,
513 unsigned n
, head
, tail
, bytesleft
;
515 gig_dbg(DEBUG_INTR
, "received %u bytes", numbytes
);
520 bytesleft
= numbytes
;
523 gig_dbg(DEBUG_INTR
, "buffer state: %u -> %u", head
, tail
);
529 n
= (RBUFSIZE
-1) - tail
;
533 dev_err(inbuf
->cs
->dev
,
534 "buffer overflow (%u bytes lost)\n",
540 memcpy(inbuf
->data
+ tail
, src
, n
);
542 tail
= (tail
+ n
) % RBUFSIZE
;
545 gig_dbg(DEBUG_INTR
, "setting tail to %u", tail
);
547 return numbytes
!= bytesleft
;
549 EXPORT_SYMBOL_GPL(gigaset_fill_inbuf
);
551 /* Initialize the b-channel structure */
552 static struct bc_state
*gigaset_initbcs(struct bc_state
*bcs
,
553 struct cardstate
*cs
, int channel
)
557 bcs
->tx_skb
= NULL
; //FIXME -> hw part
559 skb_queue_head_init(&bcs
->squeue
);
565 gig_dbg(DEBUG_INIT
, "setting up bcs[%d]->at_state", channel
);
566 gigaset_at_init(&bcs
->at_state
, bcs
, cs
, -1);
568 #ifdef CONFIG_GIGASET_DEBUG
572 gig_dbg(DEBUG_INIT
, "allocating bcs[%d]->skb", channel
);
573 bcs
->fcs
= PPP_INITFCS
;
575 if (cs
->ignoreframes
) {
576 bcs
->inputstate
|= INS_skip_frame
;
578 } else if ((bcs
->skb
= dev_alloc_skb(SBUFSIZE
+ HW_HDR_LEN
)) != NULL
)
579 skb_reserve(bcs
->skb
, HW_HDR_LEN
);
581 pr_err("out of memory\n");
582 bcs
->inputstate
|= INS_skip_frame
;
585 bcs
->channel
= channel
;
591 bcs
->ignore
= cs
->ignoreframes
;
593 for (i
= 0; i
< AT_NUM
; ++i
)
594 bcs
->commands
[i
] = NULL
;
596 gig_dbg(DEBUG_INIT
, " setting up bcs[%d]->hw", channel
);
597 if (cs
->ops
->initbcshw(bcs
))
600 gig_dbg(DEBUG_INIT
, " failed");
602 gig_dbg(DEBUG_INIT
, " freeing bcs[%d]->skb", channel
);
604 dev_kfree_skb(bcs
->skb
);
610 * Allocate and initialize cardstate structure for Gigaset driver
611 * Calls hardware dependent gigaset_initcshw() function
612 * Calls B channel initialization function gigaset_initbcs() for each B channel
614 * drv hardware driver the device belongs to
615 * channels number of B channels supported by device
616 * onechannel !=0: B channel data and AT commands share one
617 * communication channel
618 * ==0: B channels have separate communication channels
619 * ignoreframes number of frames to ignore after setting up B channel
620 * cidmode !=0: start in CallID mode
621 * modulename name of driver module (used for I4L registration)
623 * pointer to cardstate structure
625 struct cardstate
*gigaset_initcs(struct gigaset_driver
*drv
, int channels
,
626 int onechannel
, int ignoreframes
,
627 int cidmode
, const char *modulename
)
629 struct cardstate
*cs
= NULL
;
633 gig_dbg(DEBUG_INIT
, "allocating cs");
634 if (!(cs
= alloc_cs(drv
))) {
635 pr_err("maximum number of devices exceeded\n");
639 gig_dbg(DEBUG_INIT
, "allocating bcs[0..%d]", channels
- 1);
640 cs
->bcs
= kmalloc(channels
* sizeof(struct bc_state
), GFP_KERNEL
);
642 pr_err("out of memory\n");
645 gig_dbg(DEBUG_INIT
, "allocating inbuf");
646 cs
->inbuf
= kmalloc(sizeof(struct inbuf_t
), GFP_KERNEL
);
648 pr_err("out of memory\n");
653 cs
->channels
= channels
;
654 cs
->onechannel
= onechannel
;
655 cs
->ignoreframes
= ignoreframes
;
656 INIT_LIST_HEAD(&cs
->temp_at_states
);
658 init_timer(&cs
->timer
); /* clear next & prev */
659 spin_lock_init(&cs
->ev_lock
);
663 tasklet_init(&cs
->event_tasklet
, &gigaset_handle_event
,
665 cs
->commands_pending
= 0;
672 cs
->cidmode
= cidmode
!= 0;
673 cs
->tabnocid
= gigaset_tab_nocid
;
674 cs
->tabcid
= gigaset_tab_cid
;
676 init_waitqueue_head(&cs
->waitqueue
);
679 cs
->mode
= M_UNKNOWN
;
680 cs
->mstate
= MS_UNINITIALIZED
;
682 for (i
= 0; i
< channels
; ++i
) {
683 gig_dbg(DEBUG_INIT
, "setting up bcs[%d].read", i
);
684 if (!gigaset_initbcs(cs
->bcs
+ i
, cs
, i
)) {
685 pr_err("could not allocate channel %d data\n", i
);
692 gig_dbg(DEBUG_INIT
, "setting up at_state");
693 spin_lock_init(&cs
->lock
);
694 gigaset_at_init(&cs
->at_state
, NULL
, cs
, 0);
698 gig_dbg(DEBUG_INIT
, "setting up inbuf");
699 if (onechannel
) { //FIXME distinction necessary?
700 gigaset_inbuf_init(cs
->inbuf
, cs
->bcs
, cs
, INS_command
);
702 gigaset_inbuf_init(cs
->inbuf
, NULL
, cs
, INS_command
);
707 gig_dbg(DEBUG_INIT
, "setting up cmdbuf");
708 cs
->cmdbuf
= cs
->lastcmdbuf
= NULL
;
709 spin_lock_init(&cs
->cmdlock
);
713 gig_dbg(DEBUG_INIT
, "setting up iif");
714 if (!gigaset_register_to_LL(cs
, modulename
)) {
715 pr_err("error registering ISDN device\n");
719 make_valid(cs
, VALID_ID
);
721 gig_dbg(DEBUG_INIT
, "setting up hw");
722 if (!cs
->ops
->initcshw(cs
))
727 /* set up character device */
730 /* set up device sysfs */
731 gigaset_init_dev_sysfs(cs
);
733 spin_lock_irqsave(&cs
->lock
, flags
);
735 spin_unlock_irqrestore(&cs
->lock
, flags
);
736 setup_timer(&cs
->timer
, timer_tick
, (unsigned long) cs
);
737 cs
->timer
.expires
= jiffies
+ msecs_to_jiffies(GIG_TICK
);
738 /* FIXME: can jiffies increase too much until the timer is added?
739 * Same problem(?) with mod_timer() in timer_tick(). */
740 add_timer(&cs
->timer
);
742 gig_dbg(DEBUG_INIT
, "cs initialized");
746 gig_dbg(DEBUG_INIT
, "failed");
750 EXPORT_SYMBOL_GPL(gigaset_initcs
);
752 /* ReInitialize the b-channel structure on hangup */
753 void gigaset_bcs_reinit(struct bc_state
*bcs
)
756 struct cardstate
*cs
= bcs
->cs
;
759 while ((skb
= skb_dequeue(&bcs
->squeue
)) != NULL
)
762 spin_lock_irqsave(&cs
->lock
, flags
);
763 clear_at_state(&bcs
->at_state
);
764 bcs
->at_state
.ConState
= 0;
765 bcs
->at_state
.timer_active
= 0;
766 bcs
->at_state
.timer_expires
= 0;
767 bcs
->at_state
.cid
= -1; /* No CID defined */
768 spin_unlock_irqrestore(&cs
->lock
, flags
);
772 #ifdef CONFIG_GIGASET_DEBUG
776 bcs
->fcs
= PPP_INITFCS
;
779 bcs
->ignore
= cs
->ignoreframes
;
781 bcs
->inputstate
|= INS_skip_frame
;
784 cs
->ops
->reinitbcshw(bcs
);
787 static void cleanup_cs(struct cardstate
*cs
)
789 struct cmdbuf_t
*cb
, *tcb
;
793 spin_lock_irqsave(&cs
->lock
, flags
);
795 cs
->mode
= M_UNKNOWN
;
796 cs
->mstate
= MS_UNINITIALIZED
;
798 clear_at_state(&cs
->at_state
);
799 dealloc_at_states(cs
);
800 free_strings(&cs
->at_state
);
801 gigaset_at_init(&cs
->at_state
, NULL
, cs
, 0);
803 kfree(cs
->inbuf
->rcvbuf
);
804 cs
->inbuf
->rcvbuf
= NULL
;
805 cs
->inbuf
->inputstate
= INS_command
;
815 cs
->cmdbuf
= cs
->lastcmdbuf
= NULL
;
821 cs
->commands_pending
= 0;
824 spin_unlock_irqrestore(&cs
->lock
, flags
);
826 for (i
= 0; i
< cs
->channels
; ++i
) {
827 gigaset_freebcs(cs
->bcs
+ i
);
828 if (!gigaset_initbcs(cs
->bcs
+ i
, cs
, i
))
829 pr_err("could not allocate channel %d data\n", i
);
833 cs
->cmd_result
= -ENODEV
;
835 wake_up_interruptible(&cs
->waitqueue
);
840 int gigaset_start(struct cardstate
*cs
)
844 if (mutex_lock_interruptible(&cs
->mutex
))
847 spin_lock_irqsave(&cs
->lock
, flags
);
849 spin_unlock_irqrestore(&cs
->lock
, flags
);
851 if (cs
->mstate
!= MS_LOCKED
) {
852 cs
->ops
->set_modem_ctrl(cs
, 0, TIOCM_DTR
|TIOCM_RTS
);
853 cs
->ops
->baud_rate(cs
, B115200
);
854 cs
->ops
->set_line_ctrl(cs
, CS8
);
855 cs
->control_state
= TIOCM_DTR
|TIOCM_RTS
;
857 //FIXME use some saved values?
862 if (!gigaset_add_event(cs
, &cs
->at_state
, EV_START
, NULL
, 0, NULL
)) {
864 //FIXME what should we do?
868 gig_dbg(DEBUG_CMD
, "scheduling START");
869 gigaset_schedule_event(cs
);
871 wait_event(cs
->waitqueue
, !cs
->waiting
);
873 mutex_unlock(&cs
->mutex
);
877 mutex_unlock(&cs
->mutex
);
880 EXPORT_SYMBOL_GPL(gigaset_start
);
883 * check if a device is associated to the cardstate structure and stop it
884 * return value: 0 if ok, -1 if no device was associated
886 int gigaset_shutdown(struct cardstate
*cs
)
888 mutex_lock(&cs
->mutex
);
890 if (!(cs
->flags
& VALID_MINOR
)) {
891 mutex_unlock(&cs
->mutex
);
897 if (!gigaset_add_event(cs
, &cs
->at_state
, EV_SHUTDOWN
, NULL
, 0, NULL
)) {
898 //FIXME what should we do?
902 gig_dbg(DEBUG_CMD
, "scheduling SHUTDOWN");
903 gigaset_schedule_event(cs
);
905 wait_event(cs
->waitqueue
, !cs
->waiting
);
910 mutex_unlock(&cs
->mutex
);
913 EXPORT_SYMBOL_GPL(gigaset_shutdown
);
915 void gigaset_stop(struct cardstate
*cs
)
917 mutex_lock(&cs
->mutex
);
921 if (!gigaset_add_event(cs
, &cs
->at_state
, EV_STOP
, NULL
, 0, NULL
)) {
922 //FIXME what should we do?
926 gig_dbg(DEBUG_CMD
, "scheduling STOP");
927 gigaset_schedule_event(cs
);
929 wait_event(cs
->waitqueue
, !cs
->waiting
);
934 mutex_unlock(&cs
->mutex
);
936 EXPORT_SYMBOL_GPL(gigaset_stop
);
938 static LIST_HEAD(drivers
);
939 static DEFINE_SPINLOCK(driver_lock
);
941 struct cardstate
*gigaset_get_cs_by_id(int id
)
944 struct cardstate
*ret
= NULL
;
945 struct cardstate
*cs
;
946 struct gigaset_driver
*drv
;
949 spin_lock_irqsave(&driver_lock
, flags
);
950 list_for_each_entry(drv
, &drivers
, list
) {
951 spin_lock(&drv
->lock
);
952 for (i
= 0; i
< drv
->minors
; ++i
) {
954 if ((cs
->flags
& VALID_ID
) && cs
->myid
== id
) {
959 spin_unlock(&drv
->lock
);
963 spin_unlock_irqrestore(&driver_lock
, flags
);
967 void gigaset_debugdrivers(void)
970 static struct cardstate
*cs
;
971 struct gigaset_driver
*drv
;
974 spin_lock_irqsave(&driver_lock
, flags
);
975 list_for_each_entry(drv
, &drivers
, list
) {
976 gig_dbg(DEBUG_DRIVER
, "driver %p", drv
);
977 spin_lock(&drv
->lock
);
978 for (i
= 0; i
< drv
->minors
; ++i
) {
979 gig_dbg(DEBUG_DRIVER
, " index %u", i
);
981 gig_dbg(DEBUG_DRIVER
, " cardstate %p", cs
);
982 gig_dbg(DEBUG_DRIVER
, " flags 0x%02x", cs
->flags
);
983 gig_dbg(DEBUG_DRIVER
, " minor_index %u",
985 gig_dbg(DEBUG_DRIVER
, " driver %p", cs
->driver
);
986 gig_dbg(DEBUG_DRIVER
, " i4l id %d", cs
->myid
);
988 spin_unlock(&drv
->lock
);
990 spin_unlock_irqrestore(&driver_lock
, flags
);
993 static struct cardstate
*gigaset_get_cs_by_minor(unsigned minor
)
996 struct cardstate
*ret
= NULL
;
997 struct gigaset_driver
*drv
;
1000 spin_lock_irqsave(&driver_lock
, flags
);
1001 list_for_each_entry(drv
, &drivers
, list
) {
1002 if (minor
< drv
->minor
|| minor
>= drv
->minor
+ drv
->minors
)
1004 index
= minor
- drv
->minor
;
1005 spin_lock(&drv
->lock
);
1006 if (drv
->cs
[index
].flags
& VALID_MINOR
)
1007 ret
= drv
->cs
+ index
;
1008 spin_unlock(&drv
->lock
);
1012 spin_unlock_irqrestore(&driver_lock
, flags
);
1016 struct cardstate
*gigaset_get_cs_by_tty(struct tty_struct
*tty
)
1018 if (tty
->index
< 0 || tty
->index
>= tty
->driver
->num
)
1020 return gigaset_get_cs_by_minor(tty
->index
+ tty
->driver
->minor_start
);
1023 void gigaset_freedriver(struct gigaset_driver
*drv
)
1025 unsigned long flags
;
1027 spin_lock_irqsave(&driver_lock
, flags
);
1028 list_del(&drv
->list
);
1029 spin_unlock_irqrestore(&driver_lock
, flags
);
1031 gigaset_if_freedriver(drv
);
1036 EXPORT_SYMBOL_GPL(gigaset_freedriver
);
1038 /* gigaset_initdriver
1039 * Allocate and initialize gigaset_driver structure. Initialize interface.
1041 * minor First minor number
1042 * minors Number of minors this driver can handle
1043 * procname Name of the driver
1044 * devname Name of the device files (prefix without minor number)
1046 * Pointer to the gigaset_driver structure on success, NULL on failure.
1048 struct gigaset_driver
*gigaset_initdriver(unsigned minor
, unsigned minors
,
1049 const char *procname
,
1050 const char *devname
,
1051 const struct gigaset_ops
*ops
,
1052 struct module
*owner
)
1054 struct gigaset_driver
*drv
;
1055 unsigned long flags
;
1058 drv
= kmalloc(sizeof *drv
, GFP_KERNEL
);
1064 drv
->minors
= minors
;
1065 spin_lock_init(&drv
->lock
);
1069 INIT_LIST_HEAD(&drv
->list
);
1071 drv
->cs
= kmalloc(minors
* sizeof *drv
->cs
, GFP_KERNEL
);
1075 for (i
= 0; i
< minors
; ++i
) {
1076 drv
->cs
[i
].flags
= 0;
1077 drv
->cs
[i
].driver
= drv
;
1078 drv
->cs
[i
].ops
= drv
->ops
;
1079 drv
->cs
[i
].minor_index
= i
;
1080 mutex_init(&drv
->cs
[i
].mutex
);
1083 gigaset_if_initdriver(drv
, procname
, devname
);
1085 spin_lock_irqsave(&driver_lock
, flags
);
1086 list_add(&drv
->list
, &drivers
);
1087 spin_unlock_irqrestore(&driver_lock
, flags
);
1096 EXPORT_SYMBOL_GPL(gigaset_initdriver
);
1098 void gigaset_blockdriver(struct gigaset_driver
*drv
)
1102 EXPORT_SYMBOL_GPL(gigaset_blockdriver
);
1104 static int __init
gigaset_init_module(void)
1106 /* in accordance with the principle of least astonishment,
1107 * setting the 'debug' parameter to 1 activates a sensible
1108 * set of default debug levels
1110 if (gigaset_debuglevel
== 1)
1111 gigaset_debuglevel
= DEBUG_DEFAULT
;
1113 pr_info(DRIVER_DESC
"\n");
1117 static void __exit
gigaset_exit_module(void)
1121 module_init(gigaset_init_module
);
1122 module_exit(gigaset_exit_module
);
1124 MODULE_AUTHOR(DRIVER_AUTHOR
);
1125 MODULE_DESCRIPTION(DRIVER_DESC
);
1127 MODULE_LICENSE("GPL");
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