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>
20 #include <linux/slab.h>
22 /* Version Information */
23 #define DRIVER_AUTHOR "Hansjoerg Lipp <hjlipp@web.de>, Tilman Schmidt <tilman@imap.cc>, Stefan Eilers"
24 #define DRIVER_DESC "Driver for Gigaset 307x"
26 #ifdef CONFIG_GIGASET_DEBUG
27 #define DRIVER_DESC_DEBUG " (debug build)"
29 #define DRIVER_DESC_DEBUG ""
32 /* Module parameters */
33 int gigaset_debuglevel
;
34 EXPORT_SYMBOL_GPL(gigaset_debuglevel
);
35 module_param_named(debug
, gigaset_debuglevel
, int, S_IRUGO
|S_IWUSR
);
36 MODULE_PARM_DESC(debug
, "debug level");
38 /* driver state flags */
39 #define VALID_MINOR 0x01
43 * gigaset_dbg_buffer() - dump data in ASCII and hex for debugging
44 * @level: debugging level.
45 * @msg: message prefix.
46 * @len: number of bytes to dump.
49 * If the current debugging level includes one of the bits set in @level,
50 * @len bytes starting at @buf are logged to dmesg at KERN_DEBUG prio,
51 * prefixed by the text @msg.
53 void gigaset_dbg_buffer(enum debuglevel level
, const unsigned char *msg
,
54 size_t len
, const unsigned char *buf
)
56 unsigned char outbuf
[80];
58 size_t space
= sizeof outbuf
- 1;
59 unsigned char *out
= outbuf
;
64 if (c
== '~' || c
== '^' || c
== '\\') {
75 if (c
< 0x20 || c
== 0x7f) {
87 gig_dbg(level
, "%s (%u bytes): %s", msg
, (unsigned) len
, outbuf
);
89 EXPORT_SYMBOL_GPL(gigaset_dbg_buffer
);
91 static int setflags(struct cardstate
*cs
, unsigned flags
, unsigned delay
)
95 r
= cs
->ops
->set_modem_ctrl(cs
, cs
->control_state
, flags
);
96 cs
->control_state
= flags
;
101 set_current_state(TASK_INTERRUPTIBLE
);
102 schedule_timeout(delay
* HZ
/ 1000);
108 int gigaset_enterconfigmode(struct cardstate
*cs
)
112 cs
->control_state
= TIOCM_RTS
;
114 r
= setflags(cs
, TIOCM_DTR
, 200);
117 r
= setflags(cs
, 0, 200);
120 for (i
= 0; i
< 5; ++i
) {
121 r
= setflags(cs
, TIOCM_RTS
, 100);
124 r
= setflags(cs
, 0, 100);
128 r
= setflags(cs
, TIOCM_RTS
|TIOCM_DTR
, 800);
135 dev_err(cs
->dev
, "error %d on setuartbits\n", -r
);
136 cs
->control_state
= TIOCM_RTS
|TIOCM_DTR
;
137 cs
->ops
->set_modem_ctrl(cs
, 0, TIOCM_RTS
|TIOCM_DTR
);
142 static int test_timeout(struct at_state_t
*at_state
)
144 if (!at_state
->timer_expires
)
147 if (--at_state
->timer_expires
) {
148 gig_dbg(DEBUG_MCMD
, "decreased timer of %p to %lu",
149 at_state
, at_state
->timer_expires
);
153 gigaset_add_event(at_state
->cs
, at_state
, EV_TIMEOUT
, NULL
,
154 at_state
->timer_index
, NULL
);
158 static void timer_tick(unsigned long data
)
160 struct cardstate
*cs
= (struct cardstate
*) data
;
163 struct at_state_t
*at_state
;
166 spin_lock_irqsave(&cs
->lock
, flags
);
168 for (channel
= 0; channel
< cs
->channels
; ++channel
)
169 if (test_timeout(&cs
->bcs
[channel
].at_state
))
172 if (test_timeout(&cs
->at_state
))
175 list_for_each_entry(at_state
, &cs
->temp_at_states
, list
)
176 if (test_timeout(at_state
))
180 mod_timer(&cs
->timer
, jiffies
+ msecs_to_jiffies(GIG_TICK
));
182 gig_dbg(DEBUG_EVENT
, "scheduling timeout");
183 tasklet_schedule(&cs
->event_tasklet
);
187 spin_unlock_irqrestore(&cs
->lock
, flags
);
190 int gigaset_get_channel(struct bc_state
*bcs
)
194 spin_lock_irqsave(&bcs
->cs
->lock
, flags
);
195 if (bcs
->use_count
|| !try_module_get(bcs
->cs
->driver
->owner
)) {
196 gig_dbg(DEBUG_CHANNEL
, "could not allocate channel %d",
198 spin_unlock_irqrestore(&bcs
->cs
->lock
, flags
);
203 gig_dbg(DEBUG_CHANNEL
, "allocated channel %d", bcs
->channel
);
204 spin_unlock_irqrestore(&bcs
->cs
->lock
, flags
);
208 struct bc_state
*gigaset_get_free_channel(struct cardstate
*cs
)
213 spin_lock_irqsave(&cs
->lock
, flags
);
214 if (!try_module_get(cs
->driver
->owner
)) {
215 gig_dbg(DEBUG_CHANNEL
,
216 "could not get module for allocating channel");
217 spin_unlock_irqrestore(&cs
->lock
, flags
);
220 for (i
= 0; i
< cs
->channels
; ++i
)
221 if (!cs
->bcs
[i
].use_count
) {
222 ++cs
->bcs
[i
].use_count
;
224 spin_unlock_irqrestore(&cs
->lock
, flags
);
225 gig_dbg(DEBUG_CHANNEL
, "allocated channel %d", i
);
228 module_put(cs
->driver
->owner
);
229 spin_unlock_irqrestore(&cs
->lock
, flags
);
230 gig_dbg(DEBUG_CHANNEL
, "no free channel");
234 void gigaset_free_channel(struct bc_state
*bcs
)
238 spin_lock_irqsave(&bcs
->cs
->lock
, flags
);
240 gig_dbg(DEBUG_CHANNEL
, "could not free channel %d",
242 spin_unlock_irqrestore(&bcs
->cs
->lock
, flags
);
247 module_put(bcs
->cs
->driver
->owner
);
248 gig_dbg(DEBUG_CHANNEL
, "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_CHANNEL
,
262 "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_CHANNEL
, "allocated all channels");
274 void gigaset_free_channels(struct cardstate
*cs
)
279 gig_dbg(DEBUG_CHANNEL
, "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_CHANNEL
, "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 gig_dbg(DEBUG_EVENT
, "queueing event %d", type
);
344 spin_lock_irqsave(&cs
->ev_lock
, flags
);
347 next
= (tail
+ 1) % MAX_EVENTS
;
348 if (unlikely(next
== cs
->ev_head
))
349 dev_err(cs
->dev
, "event queue full\n");
351 event
= cs
->events
+ tail
;
353 event
->at_state
= at_state
;
357 event
->parameter
= parameter
;
361 spin_unlock_irqrestore(&cs
->ev_lock
, flags
);
365 EXPORT_SYMBOL_GPL(gigaset_add_event
);
367 static void free_strings(struct at_state_t
*at_state
)
371 for (i
= 0; i
< STR_NUM
; ++i
) {
372 kfree(at_state
->str_var
[i
]);
373 at_state
->str_var
[i
] = NULL
;
377 static void clear_at_state(struct at_state_t
*at_state
)
379 free_strings(at_state
);
382 static void dealloc_at_states(struct cardstate
*cs
)
384 struct at_state_t
*cur
, *next
;
386 list_for_each_entry_safe(cur
, next
, &cs
->temp_at_states
, list
) {
387 list_del(&cur
->list
);
393 static void gigaset_freebcs(struct bc_state
*bcs
)
397 gig_dbg(DEBUG_INIT
, "freeing bcs[%d]->hw", bcs
->channel
);
398 if (!bcs
->cs
->ops
->freebcshw(bcs
))
399 gig_dbg(DEBUG_INIT
, "failed");
401 gig_dbg(DEBUG_INIT
, "clearing bcs[%d]->at_state", bcs
->channel
);
402 clear_at_state(&bcs
->at_state
);
403 gig_dbg(DEBUG_INIT
, "freeing bcs[%d]->skb", bcs
->channel
);
404 dev_kfree_skb(bcs
->skb
);
407 for (i
= 0; i
< AT_NUM
; ++i
) {
408 kfree(bcs
->commands
[i
]);
409 bcs
->commands
[i
] = NULL
;
413 static struct cardstate
*alloc_cs(struct gigaset_driver
*drv
)
417 struct cardstate
*cs
;
418 struct cardstate
*ret
= NULL
;
420 spin_lock_irqsave(&drv
->lock
, flags
);
423 for (i
= 0; i
< drv
->minors
; ++i
) {
425 if (!(cs
->flags
& VALID_MINOR
)) {
426 cs
->flags
= VALID_MINOR
;
432 spin_unlock_irqrestore(&drv
->lock
, flags
);
436 static void free_cs(struct cardstate
*cs
)
441 static void make_valid(struct cardstate
*cs
, unsigned mask
)
444 struct gigaset_driver
*drv
= cs
->driver
;
445 spin_lock_irqsave(&drv
->lock
, flags
);
447 spin_unlock_irqrestore(&drv
->lock
, flags
);
450 static void make_invalid(struct cardstate
*cs
, unsigned mask
)
453 struct gigaset_driver
*drv
= cs
->driver
;
454 spin_lock_irqsave(&drv
->lock
, flags
);
456 spin_unlock_irqrestore(&drv
->lock
, flags
);
460 * gigaset_freecs() - free all associated ressources of a device
461 * @cs: device descriptor structure.
463 * Stops all tasklets and timers, unregisters the device from all
464 * subsystems it was registered to, deallocates the device structure
465 * @cs and all structures referenced from it.
466 * Operations on the device should be stopped before calling this.
468 void gigaset_freecs(struct cardstate
*cs
)
476 mutex_lock(&cs
->mutex
);
483 spin_lock_irqsave(&cs
->lock
, flags
);
485 spin_unlock_irqrestore(&cs
->lock
, flags
); /* event handler and timer are
486 not rescheduled below */
488 tasklet_kill(&cs
->event_tasklet
);
489 del_timer_sync(&cs
->timer
);
491 switch (cs
->cs_init
) {
493 /* clear B channel structures */
494 for (i
= 0; i
< cs
->channels
; ++i
) {
495 gig_dbg(DEBUG_INIT
, "clearing bcs[%d]", i
);
496 gigaset_freebcs(cs
->bcs
+ i
);
499 /* clear device sysfs */
500 gigaset_free_dev_sysfs(cs
);
504 gig_dbg(DEBUG_INIT
, "clearing hw");
505 cs
->ops
->freecshw(cs
);
508 case 2: /* error in initcshw */
509 /* Deregister from LL */
510 make_invalid(cs
, VALID_ID
);
511 gigaset_isdn_unregdev(cs
);
514 case 1: /* error when registering to LL */
515 gig_dbg(DEBUG_INIT
, "clearing at_state");
516 clear_at_state(&cs
->at_state
);
517 dealloc_at_states(cs
);
520 case 0: /* error in basic setup */
522 gig_dbg(DEBUG_INIT
, "freeing inbuf");
525 f_bcs
: gig_dbg(DEBUG_INIT
, "freeing bcs[]");
527 f_cs
: gig_dbg(DEBUG_INIT
, "freeing cs");
528 mutex_unlock(&cs
->mutex
);
531 EXPORT_SYMBOL_GPL(gigaset_freecs
);
533 void gigaset_at_init(struct at_state_t
*at_state
, struct bc_state
*bcs
,
534 struct cardstate
*cs
, int cid
)
538 INIT_LIST_HEAD(&at_state
->list
);
539 at_state
->waiting
= 0;
540 at_state
->getstring
= 0;
541 at_state
->pending_commands
= 0;
542 at_state
->timer_expires
= 0;
543 at_state
->timer_active
= 0;
544 at_state
->timer_index
= 0;
545 at_state
->seq_index
= 0;
546 at_state
->ConState
= 0;
547 for (i
= 0; i
< STR_NUM
; ++i
)
548 at_state
->str_var
[i
] = NULL
;
549 at_state
->int_var
[VAR_ZDLE
] = 0;
550 at_state
->int_var
[VAR_ZCTP
] = -1;
551 at_state
->int_var
[VAR_ZSAU
] = ZSAU_NULL
;
556 at_state
->replystruct
= cs
->tabnocid
;
558 at_state
->replystruct
= cs
->tabcid
;
562 static void gigaset_inbuf_init(struct inbuf_t
*inbuf
, struct cardstate
*cs
)
563 /* inbuf->read must be allocated before! */
568 inbuf
->inputstate
= INS_command
;
572 * gigaset_fill_inbuf() - append received data to input buffer
573 * @inbuf: buffer structure.
574 * @src: received data.
575 * @numbytes: number of bytes received.
577 int gigaset_fill_inbuf(struct inbuf_t
*inbuf
, const unsigned char *src
,
580 unsigned n
, head
, tail
, bytesleft
;
582 gig_dbg(DEBUG_INTR
, "received %u bytes", numbytes
);
587 bytesleft
= numbytes
;
590 gig_dbg(DEBUG_INTR
, "buffer state: %u -> %u", head
, tail
);
596 n
= (RBUFSIZE
-1) - tail
;
600 dev_err(inbuf
->cs
->dev
,
601 "buffer overflow (%u bytes lost)\n",
607 memcpy(inbuf
->data
+ tail
, src
, n
);
609 tail
= (tail
+ n
) % RBUFSIZE
;
612 gig_dbg(DEBUG_INTR
, "setting tail to %u", tail
);
614 return numbytes
!= bytesleft
;
616 EXPORT_SYMBOL_GPL(gigaset_fill_inbuf
);
618 /* Initialize the b-channel structure */
619 static struct bc_state
*gigaset_initbcs(struct bc_state
*bcs
,
620 struct cardstate
*cs
, int channel
)
626 skb_queue_head_init(&bcs
->squeue
);
632 gig_dbg(DEBUG_INIT
, "setting up bcs[%d]->at_state", channel
);
633 gigaset_at_init(&bcs
->at_state
, bcs
, cs
, -1);
635 #ifdef CONFIG_GIGASET_DEBUG
639 gig_dbg(DEBUG_INIT
, "allocating bcs[%d]->skb", channel
);
640 bcs
->fcs
= PPP_INITFCS
;
642 if (cs
->ignoreframes
) {
645 bcs
->skb
= dev_alloc_skb(SBUFSIZE
+ cs
->hw_hdr_len
);
646 if (bcs
->skb
!= NULL
)
647 skb_reserve(bcs
->skb
, cs
->hw_hdr_len
);
649 pr_err("out of memory\n");
652 bcs
->channel
= channel
;
658 bcs
->ignore
= cs
->ignoreframes
;
660 for (i
= 0; i
< AT_NUM
; ++i
)
661 bcs
->commands
[i
] = NULL
;
663 gig_dbg(DEBUG_INIT
, " setting up bcs[%d]->hw", channel
);
664 if (cs
->ops
->initbcshw(bcs
))
667 gig_dbg(DEBUG_INIT
, " failed");
669 gig_dbg(DEBUG_INIT
, " freeing bcs[%d]->skb", channel
);
670 dev_kfree_skb(bcs
->skb
);
677 * gigaset_initcs() - initialize device structure
678 * @drv: hardware driver the device belongs to
679 * @channels: number of B channels supported by device
680 * @onechannel: !=0 if B channel data and AT commands share one
681 * communication channel (M10x),
682 * ==0 if B channels have separate communication channels (base)
683 * @ignoreframes: number of frames to ignore after setting up B channel
684 * @cidmode: !=0: start in CallID mode
685 * @modulename: name of driver module for LL registration
687 * Allocate and initialize cardstate structure for Gigaset driver
688 * Calls hardware dependent gigaset_initcshw() function
689 * Calls B channel initialization function gigaset_initbcs() for each B channel
692 * pointer to cardstate structure
694 struct cardstate
*gigaset_initcs(struct gigaset_driver
*drv
, int channels
,
695 int onechannel
, int ignoreframes
,
696 int cidmode
, const char *modulename
)
698 struct cardstate
*cs
;
702 gig_dbg(DEBUG_INIT
, "allocating cs");
705 pr_err("maximum number of devices exceeded\n");
709 gig_dbg(DEBUG_INIT
, "allocating bcs[0..%d]", channels
- 1);
710 cs
->bcs
= kmalloc(channels
* sizeof(struct bc_state
), GFP_KERNEL
);
712 pr_err("out of memory\n");
715 gig_dbg(DEBUG_INIT
, "allocating inbuf");
716 cs
->inbuf
= kmalloc(sizeof(struct inbuf_t
), GFP_KERNEL
);
718 pr_err("out of memory\n");
723 cs
->channels
= channels
;
724 cs
->onechannel
= onechannel
;
725 cs
->ignoreframes
= ignoreframes
;
726 INIT_LIST_HEAD(&cs
->temp_at_states
);
728 init_timer(&cs
->timer
); /* clear next & prev */
729 spin_lock_init(&cs
->ev_lock
);
733 tasklet_init(&cs
->event_tasklet
, gigaset_handle_event
,
735 cs
->commands_pending
= 0;
742 cs
->cidmode
= cidmode
!= 0;
743 cs
->tabnocid
= gigaset_tab_nocid
;
744 cs
->tabcid
= gigaset_tab_cid
;
746 init_waitqueue_head(&cs
->waitqueue
);
749 cs
->mode
= M_UNKNOWN
;
750 cs
->mstate
= MS_UNINITIALIZED
;
754 gig_dbg(DEBUG_INIT
, "setting up at_state");
755 spin_lock_init(&cs
->lock
);
756 gigaset_at_init(&cs
->at_state
, NULL
, cs
, 0);
760 gig_dbg(DEBUG_INIT
, "setting up inbuf");
761 gigaset_inbuf_init(cs
->inbuf
, cs
);
766 gig_dbg(DEBUG_INIT
, "setting up cmdbuf");
767 cs
->cmdbuf
= cs
->lastcmdbuf
= NULL
;
768 spin_lock_init(&cs
->cmdlock
);
772 gig_dbg(DEBUG_INIT
, "setting up iif");
773 if (!gigaset_isdn_regdev(cs
, modulename
)) {
774 pr_err("error registering ISDN device\n");
778 make_valid(cs
, VALID_ID
);
780 gig_dbg(DEBUG_INIT
, "setting up hw");
781 if (!cs
->ops
->initcshw(cs
))
786 /* set up character device */
789 /* set up device sysfs */
790 gigaset_init_dev_sysfs(cs
);
792 /* set up channel data structures */
793 for (i
= 0; i
< channels
; ++i
) {
794 gig_dbg(DEBUG_INIT
, "setting up bcs[%d]", i
);
795 if (!gigaset_initbcs(cs
->bcs
+ i
, cs
, i
)) {
796 pr_err("could not allocate channel %d data\n", i
);
801 spin_lock_irqsave(&cs
->lock
, flags
);
803 spin_unlock_irqrestore(&cs
->lock
, flags
);
804 setup_timer(&cs
->timer
, timer_tick
, (unsigned long) cs
);
805 cs
->timer
.expires
= jiffies
+ msecs_to_jiffies(GIG_TICK
);
806 /* FIXME: can jiffies increase too much until the timer is added?
807 * Same problem(?) with mod_timer() in timer_tick(). */
808 add_timer(&cs
->timer
);
810 gig_dbg(DEBUG_INIT
, "cs initialized");
814 gig_dbg(DEBUG_INIT
, "failed");
818 EXPORT_SYMBOL_GPL(gigaset_initcs
);
820 /* ReInitialize the b-channel structure on hangup */
821 void gigaset_bcs_reinit(struct bc_state
*bcs
)
824 struct cardstate
*cs
= bcs
->cs
;
827 while ((skb
= skb_dequeue(&bcs
->squeue
)) != NULL
)
830 spin_lock_irqsave(&cs
->lock
, flags
);
831 clear_at_state(&bcs
->at_state
);
832 bcs
->at_state
.ConState
= 0;
833 bcs
->at_state
.timer_active
= 0;
834 bcs
->at_state
.timer_expires
= 0;
835 bcs
->at_state
.cid
= -1; /* No CID defined */
836 spin_unlock_irqrestore(&cs
->lock
, flags
);
840 #ifdef CONFIG_GIGASET_DEBUG
844 bcs
->fcs
= PPP_INITFCS
;
847 bcs
->ignore
= cs
->ignoreframes
;
849 dev_kfree_skb(bcs
->skb
);
853 cs
->ops
->reinitbcshw(bcs
);
856 static void cleanup_cs(struct cardstate
*cs
)
858 struct cmdbuf_t
*cb
, *tcb
;
862 spin_lock_irqsave(&cs
->lock
, flags
);
864 cs
->mode
= M_UNKNOWN
;
865 cs
->mstate
= MS_UNINITIALIZED
;
867 clear_at_state(&cs
->at_state
);
868 dealloc_at_states(cs
);
869 free_strings(&cs
->at_state
);
870 gigaset_at_init(&cs
->at_state
, NULL
, cs
, 0);
872 cs
->inbuf
->inputstate
= INS_command
;
882 cs
->cmdbuf
= cs
->lastcmdbuf
= NULL
;
888 cs
->commands_pending
= 0;
891 spin_unlock_irqrestore(&cs
->lock
, flags
);
893 for (i
= 0; i
< cs
->channels
; ++i
) {
894 gigaset_freebcs(cs
->bcs
+ i
);
895 if (!gigaset_initbcs(cs
->bcs
+ i
, cs
, i
))
896 pr_err("could not allocate channel %d data\n", i
);
900 cs
->cmd_result
= -ENODEV
;
902 wake_up_interruptible(&cs
->waitqueue
);
908 * gigaset_start() - start device operations
909 * @cs: device descriptor structure.
911 * Prepares the device for use by setting up communication parameters,
912 * scheduling an EV_START event to initiate device initialization, and
913 * waiting for completion of the initialization.
916 * 1 - success, 0 - error
918 int gigaset_start(struct cardstate
*cs
)
922 if (mutex_lock_interruptible(&cs
->mutex
))
925 spin_lock_irqsave(&cs
->lock
, flags
);
927 spin_unlock_irqrestore(&cs
->lock
, flags
);
929 if (cs
->mstate
!= MS_LOCKED
) {
930 cs
->ops
->set_modem_ctrl(cs
, 0, TIOCM_DTR
|TIOCM_RTS
);
931 cs
->ops
->baud_rate(cs
, B115200
);
932 cs
->ops
->set_line_ctrl(cs
, CS8
);
933 cs
->control_state
= TIOCM_DTR
|TIOCM_RTS
;
938 if (!gigaset_add_event(cs
, &cs
->at_state
, EV_START
, NULL
, 0, NULL
)) {
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
))
978 gigaset_schedule_event(cs
);
980 wait_event(cs
->waitqueue
, !cs
->waiting
);
985 mutex_unlock(&cs
->mutex
);
988 EXPORT_SYMBOL_GPL(gigaset_shutdown
);
991 * gigaset_stop() - stop device operations
992 * @cs: device descriptor structure.
994 * Stops operations on the device by scheduling an EV_STOP event and
995 * waiting for completion of the shutdown.
997 void gigaset_stop(struct cardstate
*cs
)
999 mutex_lock(&cs
->mutex
);
1003 if (!gigaset_add_event(cs
, &cs
->at_state
, EV_STOP
, NULL
, 0, NULL
))
1005 gigaset_schedule_event(cs
);
1007 wait_event(cs
->waitqueue
, !cs
->waiting
);
1012 mutex_unlock(&cs
->mutex
);
1014 EXPORT_SYMBOL_GPL(gigaset_stop
);
1016 static LIST_HEAD(drivers
);
1017 static DEFINE_SPINLOCK(driver_lock
);
1019 struct cardstate
*gigaset_get_cs_by_id(int id
)
1021 unsigned long flags
;
1022 struct cardstate
*ret
= NULL
;
1023 struct cardstate
*cs
;
1024 struct gigaset_driver
*drv
;
1027 spin_lock_irqsave(&driver_lock
, flags
);
1028 list_for_each_entry(drv
, &drivers
, list
) {
1029 spin_lock(&drv
->lock
);
1030 for (i
= 0; i
< drv
->minors
; ++i
) {
1032 if ((cs
->flags
& VALID_ID
) && cs
->myid
== id
) {
1037 spin_unlock(&drv
->lock
);
1041 spin_unlock_irqrestore(&driver_lock
, flags
);
1045 void gigaset_debugdrivers(void)
1047 unsigned long flags
;
1048 static struct cardstate
*cs
;
1049 struct gigaset_driver
*drv
;
1052 spin_lock_irqsave(&driver_lock
, flags
);
1053 list_for_each_entry(drv
, &drivers
, list
) {
1054 gig_dbg(DEBUG_DRIVER
, "driver %p", drv
);
1055 spin_lock(&drv
->lock
);
1056 for (i
= 0; i
< drv
->minors
; ++i
) {
1057 gig_dbg(DEBUG_DRIVER
, " index %u", i
);
1059 gig_dbg(DEBUG_DRIVER
, " cardstate %p", cs
);
1060 gig_dbg(DEBUG_DRIVER
, " flags 0x%02x", cs
->flags
);
1061 gig_dbg(DEBUG_DRIVER
, " minor_index %u",
1063 gig_dbg(DEBUG_DRIVER
, " driver %p", cs
->driver
);
1064 gig_dbg(DEBUG_DRIVER
, " i4l id %d", cs
->myid
);
1066 spin_unlock(&drv
->lock
);
1068 spin_unlock_irqrestore(&driver_lock
, flags
);
1071 static struct cardstate
*gigaset_get_cs_by_minor(unsigned minor
)
1073 unsigned long flags
;
1074 struct cardstate
*ret
= NULL
;
1075 struct gigaset_driver
*drv
;
1078 spin_lock_irqsave(&driver_lock
, flags
);
1079 list_for_each_entry(drv
, &drivers
, list
) {
1080 if (minor
< drv
->minor
|| minor
>= drv
->minor
+ drv
->minors
)
1082 index
= minor
- drv
->minor
;
1083 spin_lock(&drv
->lock
);
1084 if (drv
->cs
[index
].flags
& VALID_MINOR
)
1085 ret
= drv
->cs
+ index
;
1086 spin_unlock(&drv
->lock
);
1090 spin_unlock_irqrestore(&driver_lock
, flags
);
1094 struct cardstate
*gigaset_get_cs_by_tty(struct tty_struct
*tty
)
1096 if (tty
->index
< 0 || tty
->index
>= tty
->driver
->num
)
1098 return gigaset_get_cs_by_minor(tty
->index
+ tty
->driver
->minor_start
);
1102 * gigaset_freedriver() - free all associated ressources of a driver
1103 * @drv: driver descriptor structure.
1105 * Unregisters the driver from the system and deallocates the driver
1106 * structure @drv and all structures referenced from it.
1107 * All devices should be shut down before calling this.
1109 void gigaset_freedriver(struct gigaset_driver
*drv
)
1111 unsigned long flags
;
1113 spin_lock_irqsave(&driver_lock
, flags
);
1114 list_del(&drv
->list
);
1115 spin_unlock_irqrestore(&driver_lock
, flags
);
1117 gigaset_if_freedriver(drv
);
1122 EXPORT_SYMBOL_GPL(gigaset_freedriver
);
1125 * gigaset_initdriver() - initialize driver structure
1126 * @minor: First minor number
1127 * @minors: Number of minors this driver can handle
1128 * @procname: Name of the driver
1129 * @devname: Name of the device files (prefix without minor number)
1131 * Allocate and initialize gigaset_driver structure. Initialize interface.
1134 * Pointer to the gigaset_driver structure on success, NULL on failure.
1136 struct gigaset_driver
*gigaset_initdriver(unsigned minor
, unsigned minors
,
1137 const char *procname
,
1138 const char *devname
,
1139 const struct gigaset_ops
*ops
,
1140 struct module
*owner
)
1142 struct gigaset_driver
*drv
;
1143 unsigned long flags
;
1146 drv
= kmalloc(sizeof *drv
, GFP_KERNEL
);
1152 drv
->minors
= minors
;
1153 spin_lock_init(&drv
->lock
);
1157 INIT_LIST_HEAD(&drv
->list
);
1159 drv
->cs
= kmalloc(minors
* sizeof *drv
->cs
, GFP_KERNEL
);
1163 for (i
= 0; i
< minors
; ++i
) {
1164 drv
->cs
[i
].flags
= 0;
1165 drv
->cs
[i
].driver
= drv
;
1166 drv
->cs
[i
].ops
= drv
->ops
;
1167 drv
->cs
[i
].minor_index
= i
;
1168 mutex_init(&drv
->cs
[i
].mutex
);
1171 gigaset_if_initdriver(drv
, procname
, devname
);
1173 spin_lock_irqsave(&driver_lock
, flags
);
1174 list_add(&drv
->list
, &drivers
);
1175 spin_unlock_irqrestore(&driver_lock
, flags
);
1184 EXPORT_SYMBOL_GPL(gigaset_initdriver
);
1187 * gigaset_blockdriver() - block driver
1188 * @drv: driver descriptor structure.
1190 * Prevents the driver from attaching new devices, in preparation for
1193 void gigaset_blockdriver(struct gigaset_driver
*drv
)
1197 EXPORT_SYMBOL_GPL(gigaset_blockdriver
);
1199 static int __init
gigaset_init_module(void)
1201 /* in accordance with the principle of least astonishment,
1202 * setting the 'debug' parameter to 1 activates a sensible
1203 * set of default debug levels
1205 if (gigaset_debuglevel
== 1)
1206 gigaset_debuglevel
= DEBUG_DEFAULT
;
1208 pr_info(DRIVER_DESC DRIVER_DESC_DEBUG
"\n");
1209 gigaset_isdn_regdrv();
1213 static void __exit
gigaset_exit_module(void)
1215 gigaset_isdn_unregdrv();
1218 module_init(gigaset_init_module
);
1219 module_exit(gigaset_exit_module
);
1221 MODULE_AUTHOR(DRIVER_AUTHOR
);
1222 MODULE_DESCRIPTION(DRIVER_DESC
);
1224 MODULE_LICENSE("GPL");