]>
git.proxmox.com Git - mirror_ubuntu-jammy-kernel.git/blob - drivers/isdn/gigaset/common.c
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
36 void gigaset_dbg_buffer(enum debuglevel level
, const unsigned char *msg
,
37 size_t len
, const unsigned char *buf
)
39 unsigned char outbuf
[80];
41 size_t space
= sizeof outbuf
- 1;
42 unsigned char *out
= outbuf
;
47 if (c
== '~' || c
== '^' || c
== '\\') {
58 if (c
< 0x20 || c
== 0x7f) {
70 gig_dbg(level
, "%s (%u bytes): %s", msg
, (unsigned) len
, outbuf
);
72 EXPORT_SYMBOL_GPL(gigaset_dbg_buffer
);
74 static int setflags(struct cardstate
*cs
, unsigned flags
, unsigned delay
)
78 r
= cs
->ops
->set_modem_ctrl(cs
, cs
->control_state
, flags
);
79 cs
->control_state
= flags
;
84 set_current_state(TASK_INTERRUPTIBLE
);
85 schedule_timeout(delay
* HZ
/ 1000);
91 int gigaset_enterconfigmode(struct cardstate
*cs
)
95 cs
->control_state
= TIOCM_RTS
; //FIXME
97 r
= setflags(cs
, TIOCM_DTR
, 200);
100 r
= setflags(cs
, 0, 200);
103 for (i
= 0; i
< 5; ++i
) {
104 r
= setflags(cs
, TIOCM_RTS
, 100);
107 r
= setflags(cs
, 0, 100);
111 r
= setflags(cs
, TIOCM_RTS
|TIOCM_DTR
, 800);
118 dev_err(cs
->dev
, "error %d on setuartbits\n", -r
);
119 cs
->control_state
= TIOCM_RTS
|TIOCM_DTR
; // FIXME is this a good value?
120 cs
->ops
->set_modem_ctrl(cs
, 0, TIOCM_RTS
|TIOCM_DTR
);
125 static int test_timeout(struct at_state_t
*at_state
)
127 if (!at_state
->timer_expires
)
130 if (--at_state
->timer_expires
) {
131 gig_dbg(DEBUG_MCMD
, "decreased timer of %p to %lu",
132 at_state
, at_state
->timer_expires
);
136 if (!gigaset_add_event(at_state
->cs
, at_state
, EV_TIMEOUT
, NULL
,
137 at_state
->timer_index
, NULL
)) {
138 //FIXME what should we do?
144 static void timer_tick(unsigned long data
)
146 struct cardstate
*cs
= (struct cardstate
*) data
;
149 struct at_state_t
*at_state
;
152 spin_lock_irqsave(&cs
->lock
, flags
);
154 for (channel
= 0; channel
< cs
->channels
; ++channel
)
155 if (test_timeout(&cs
->bcs
[channel
].at_state
))
158 if (test_timeout(&cs
->at_state
))
161 list_for_each_entry(at_state
, &cs
->temp_at_states
, list
)
162 if (test_timeout(at_state
))
166 mod_timer(&cs
->timer
, jiffies
+ msecs_to_jiffies(GIG_TICK
));
168 gig_dbg(DEBUG_CMD
, "scheduling timeout");
169 tasklet_schedule(&cs
->event_tasklet
);
173 spin_unlock_irqrestore(&cs
->lock
, flags
);
176 int gigaset_get_channel(struct bc_state
*bcs
)
180 spin_lock_irqsave(&bcs
->cs
->lock
, flags
);
181 if (bcs
->use_count
) {
182 gig_dbg(DEBUG_ANY
, "could not allocate channel %d",
184 spin_unlock_irqrestore(&bcs
->cs
->lock
, flags
);
189 gig_dbg(DEBUG_ANY
, "allocated channel %d", bcs
->channel
);
190 spin_unlock_irqrestore(&bcs
->cs
->lock
, flags
);
194 void gigaset_free_channel(struct bc_state
*bcs
)
198 spin_lock_irqsave(&bcs
->cs
->lock
, flags
);
200 gig_dbg(DEBUG_ANY
, "could not free channel %d", bcs
->channel
);
201 spin_unlock_irqrestore(&bcs
->cs
->lock
, flags
);
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 err("event queue full");
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
*ret
= NULL
;
361 spin_lock_irqsave(&drv
->lock
, flags
);
362 for (i
= 0; i
< drv
->minors
; ++i
) {
363 if (!(drv
->flags
[i
] & VALID_MINOR
)) {
364 if (try_module_get(drv
->owner
)) {
365 drv
->flags
[i
] = VALID_MINOR
;
371 spin_unlock_irqrestore(&drv
->lock
, flags
);
375 static void free_cs(struct cardstate
*cs
)
378 struct gigaset_driver
*drv
= cs
->driver
;
379 spin_lock_irqsave(&drv
->lock
, flags
);
380 if (drv
->flags
[cs
->minor_index
] & VALID_MINOR
)
381 module_put(drv
->owner
);
382 drv
->flags
[cs
->minor_index
] = 0;
383 spin_unlock_irqrestore(&drv
->lock
, flags
);
386 static void make_valid(struct cardstate
*cs
, unsigned mask
)
389 struct gigaset_driver
*drv
= cs
->driver
;
390 spin_lock_irqsave(&drv
->lock
, flags
);
391 drv
->flags
[cs
->minor_index
] |= mask
;
392 spin_unlock_irqrestore(&drv
->lock
, flags
);
395 static void make_invalid(struct cardstate
*cs
, unsigned mask
)
398 struct gigaset_driver
*drv
= cs
->driver
;
399 spin_lock_irqsave(&drv
->lock
, flags
);
400 drv
->flags
[cs
->minor_index
] &= ~mask
;
401 spin_unlock_irqrestore(&drv
->lock
, flags
);
404 void gigaset_freecs(struct cardstate
*cs
)
412 mutex_lock(&cs
->mutex
);
419 spin_lock_irqsave(&cs
->lock
, flags
);
421 spin_unlock_irqrestore(&cs
->lock
, flags
); /* event handler and timer are
422 not rescheduled below */
424 tasklet_kill(&cs
->event_tasklet
);
425 del_timer_sync(&cs
->timer
);
427 switch (cs
->cs_init
) {
429 /* clear device sysfs */
430 gigaset_free_dev_sysfs(cs
);
434 gig_dbg(DEBUG_INIT
, "clearing hw");
435 cs
->ops
->freecshw(cs
);
440 case 2: /* error in initcshw */
441 /* Deregister from LL */
442 make_invalid(cs
, VALID_ID
);
443 gig_dbg(DEBUG_INIT
, "clearing iif");
444 gigaset_i4l_cmd(cs
, ISDN_STAT_UNLOAD
);
447 case 1: /* error when regestering to LL */
448 gig_dbg(DEBUG_INIT
, "clearing at_state");
449 clear_at_state(&cs
->at_state
);
450 dealloc_at_states(cs
);
453 case 0: /* error in one call to initbcs */
454 for (i
= 0; i
< cs
->channels
; ++i
) {
455 gig_dbg(DEBUG_INIT
, "clearing bcs[%d]", i
);
456 gigaset_freebcs(cs
->bcs
+ i
);
460 gig_dbg(DEBUG_INIT
, "freeing inbuf");
463 f_bcs
: gig_dbg(DEBUG_INIT
, "freeing bcs[]");
465 f_cs
: gig_dbg(DEBUG_INIT
, "freeing cs");
466 mutex_unlock(&cs
->mutex
);
469 EXPORT_SYMBOL_GPL(gigaset_freecs
);
471 void gigaset_at_init(struct at_state_t
*at_state
, struct bc_state
*bcs
,
472 struct cardstate
*cs
, int cid
)
476 INIT_LIST_HEAD(&at_state
->list
);
477 at_state
->waiting
= 0;
478 at_state
->getstring
= 0;
479 at_state
->pending_commands
= 0;
480 at_state
->timer_expires
= 0;
481 at_state
->timer_active
= 0;
482 at_state
->timer_index
= 0;
483 at_state
->seq_index
= 0;
484 at_state
->ConState
= 0;
485 for (i
= 0; i
< STR_NUM
; ++i
)
486 at_state
->str_var
[i
] = NULL
;
487 at_state
->int_var
[VAR_ZDLE
] = 0;
488 at_state
->int_var
[VAR_ZCTP
] = -1;
489 at_state
->int_var
[VAR_ZSAU
] = ZSAU_NULL
;
494 at_state
->replystruct
= cs
->tabnocid
;
496 at_state
->replystruct
= cs
->tabcid
;
500 static void gigaset_inbuf_init(struct inbuf_t
*inbuf
, struct bc_state
*bcs
,
501 struct cardstate
*cs
, int inputstate
)
502 /* inbuf->read must be allocated before! */
504 atomic_set(&inbuf
->head
, 0);
505 atomic_set(&inbuf
->tail
, 0);
507 inbuf
->bcs
= bcs
; /*base driver: NULL*/
508 inbuf
->rcvbuf
= NULL
; //FIXME
509 inbuf
->inputstate
= inputstate
;
512 /* append received bytes to inbuf */
513 int gigaset_fill_inbuf(struct inbuf_t
*inbuf
, const unsigned char *src
,
516 unsigned n
, head
, tail
, bytesleft
;
518 gig_dbg(DEBUG_INTR
, "received %u bytes", numbytes
);
523 bytesleft
= numbytes
;
524 tail
= atomic_read(&inbuf
->tail
);
525 head
= atomic_read(&inbuf
->head
);
526 gig_dbg(DEBUG_INTR
, "buffer state: %u -> %u", head
, tail
);
532 n
= (RBUFSIZE
-1) - tail
;
536 dev_err(inbuf
->cs
->dev
,
537 "buffer overflow (%u bytes lost)\n",
543 memcpy(inbuf
->data
+ tail
, src
, n
);
545 tail
= (tail
+ n
) % RBUFSIZE
;
548 gig_dbg(DEBUG_INTR
, "setting tail to %u", tail
);
549 atomic_set(&inbuf
->tail
, tail
);
550 return numbytes
!= bytesleft
;
552 EXPORT_SYMBOL_GPL(gigaset_fill_inbuf
);
554 /* Initialize the b-channel structure */
555 static struct bc_state
*gigaset_initbcs(struct bc_state
*bcs
,
556 struct cardstate
*cs
, int channel
)
560 bcs
->tx_skb
= NULL
; //FIXME -> hw part
562 skb_queue_head_init(&bcs
->squeue
);
568 gig_dbg(DEBUG_INIT
, "setting up bcs[%d]->at_state", channel
);
569 gigaset_at_init(&bcs
->at_state
, bcs
, cs
, -1);
573 #ifdef CONFIG_GIGASET_DEBUG
577 gig_dbg(DEBUG_INIT
, "allocating bcs[%d]->skb", channel
);
578 bcs
->fcs
= PPP_INITFCS
;
580 if (cs
->ignoreframes
) {
581 bcs
->inputstate
|= INS_skip_frame
;
583 } else if ((bcs
->skb
= dev_alloc_skb(SBUFSIZE
+ HW_HDR_LEN
)) != NULL
)
584 skb_reserve(bcs
->skb
, HW_HDR_LEN
);
586 warn("could not allocate skb");
587 bcs
->inputstate
|= INS_skip_frame
;
590 bcs
->channel
= channel
;
596 bcs
->ignore
= cs
->ignoreframes
;
598 for (i
= 0; i
< AT_NUM
; ++i
)
599 bcs
->commands
[i
] = NULL
;
601 gig_dbg(DEBUG_INIT
, " setting up bcs[%d]->hw", channel
);
602 if (cs
->ops
->initbcshw(bcs
))
605 gig_dbg(DEBUG_INIT
, " failed");
607 gig_dbg(DEBUG_INIT
, " freeing bcs[%d]->skb", channel
);
609 dev_kfree_skb(bcs
->skb
);
615 * Allocate and initialize cardstate structure for Gigaset driver
616 * Calls hardware dependent gigaset_initcshw() function
617 * Calls B channel initialization function gigaset_initbcs() for each B channel
619 * drv hardware driver the device belongs to
620 * channels number of B channels supported by device
621 * onechannel !=0: B channel data and AT commands share one
622 * communication channel
623 * ==0: B channels have separate communication channels
624 * ignoreframes number of frames to ignore after setting up B channel
625 * cidmode !=0: start in CallID mode
626 * modulename name of driver module (used for I4L registration)
628 * pointer to cardstate structure
630 struct cardstate
*gigaset_initcs(struct gigaset_driver
*drv
, int channels
,
631 int onechannel
, int ignoreframes
,
632 int cidmode
, const char *modulename
)
634 struct cardstate
*cs
= NULL
;
638 gig_dbg(DEBUG_INIT
, "allocating cs");
639 if (!(cs
= alloc_cs(drv
))) {
640 err("maximum number of devices exceeded");
643 mutex_init(&cs
->mutex
);
645 gig_dbg(DEBUG_INIT
, "allocating bcs[0..%d]", channels
- 1);
646 cs
->bcs
= kmalloc(channels
* sizeof(struct bc_state
), GFP_KERNEL
);
648 err("out of memory");
651 gig_dbg(DEBUG_INIT
, "allocating inbuf");
652 cs
->inbuf
= kmalloc(sizeof(struct inbuf_t
), GFP_KERNEL
);
654 err("out of memory");
659 cs
->channels
= channels
;
660 cs
->onechannel
= onechannel
;
661 cs
->ignoreframes
= ignoreframes
;
662 INIT_LIST_HEAD(&cs
->temp_at_states
);
664 init_timer(&cs
->timer
); /* clear next & prev */
665 spin_lock_init(&cs
->ev_lock
);
669 tasklet_init(&cs
->event_tasklet
, &gigaset_handle_event
,
671 atomic_set(&cs
->commands_pending
, 0);
678 cs
->cidmode
= cidmode
!= 0;
680 //if(onechannel) { //FIXME
681 cs
->tabnocid
= gigaset_tab_nocid_m10x
;
682 cs
->tabcid
= gigaset_tab_cid_m10x
;
684 // cs->tabnocid = gigaset_tab_nocid;
685 // cs->tabcid = gigaset_tab_cid;
688 init_waitqueue_head(&cs
->waitqueue
);
691 atomic_set(&cs
->mode
, M_UNKNOWN
);
692 atomic_set(&cs
->mstate
, MS_UNINITIALIZED
);
694 for (i
= 0; i
< channels
; ++i
) {
695 gig_dbg(DEBUG_INIT
, "setting up bcs[%d].read", i
);
696 if (!gigaset_initbcs(cs
->bcs
+ i
, cs
, i
)) {
697 err("could not allocate channel %d data", i
);
704 gig_dbg(DEBUG_INIT
, "setting up at_state");
705 spin_lock_init(&cs
->lock
);
706 gigaset_at_init(&cs
->at_state
, NULL
, cs
, 0);
710 gig_dbg(DEBUG_INIT
, "setting up inbuf");
711 if (onechannel
) { //FIXME distinction necessary?
712 gigaset_inbuf_init(cs
->inbuf
, cs
->bcs
, cs
, INS_command
);
714 gigaset_inbuf_init(cs
->inbuf
, NULL
, cs
, INS_command
);
719 gig_dbg(DEBUG_INIT
, "setting up cmdbuf");
720 cs
->cmdbuf
= cs
->lastcmdbuf
= NULL
;
721 spin_lock_init(&cs
->cmdlock
);
725 gig_dbg(DEBUG_INIT
, "setting up iif");
726 if (!gigaset_register_to_LL(cs
, modulename
)) {
727 err("register_isdn failed");
731 make_valid(cs
, VALID_ID
);
733 gig_dbg(DEBUG_INIT
, "setting up hw");
734 if (!cs
->ops
->initcshw(cs
)) {
735 err("could not allocate device specific data");
741 /* set up character device */
744 /* set up device sysfs */
745 gigaset_init_dev_sysfs(cs
);
747 spin_lock_irqsave(&cs
->lock
, flags
);
749 spin_unlock_irqrestore(&cs
->lock
, flags
);
750 setup_timer(&cs
->timer
, timer_tick
, (unsigned long) cs
);
751 cs
->timer
.expires
= jiffies
+ msecs_to_jiffies(GIG_TICK
);
752 /* FIXME: can jiffies increase too much until the timer is added?
753 * Same problem(?) with mod_timer() in timer_tick(). */
754 add_timer(&cs
->timer
);
756 gig_dbg(DEBUG_INIT
, "cs initialized");
760 gig_dbg(DEBUG_INIT
, "failed");
764 EXPORT_SYMBOL_GPL(gigaset_initcs
);
766 /* ReInitialize the b-channel structure on hangup */
767 void gigaset_bcs_reinit(struct bc_state
*bcs
)
770 struct cardstate
*cs
= bcs
->cs
;
773 while ((skb
= skb_dequeue(&bcs
->squeue
)) != NULL
)
776 spin_lock_irqsave(&cs
->lock
, flags
);
777 clear_at_state(&bcs
->at_state
);
778 bcs
->at_state
.ConState
= 0;
779 bcs
->at_state
.timer_active
= 0;
780 bcs
->at_state
.timer_expires
= 0;
781 bcs
->at_state
.cid
= -1; /* No CID defined */
782 spin_unlock_irqrestore(&cs
->lock
, flags
);
786 #ifdef CONFIG_GIGASET_DEBUG
790 bcs
->fcs
= PPP_INITFCS
;
793 bcs
->ignore
= cs
->ignoreframes
;
795 bcs
->inputstate
|= INS_skip_frame
;
798 cs
->ops
->reinitbcshw(bcs
);
801 static void cleanup_cs(struct cardstate
*cs
)
803 struct cmdbuf_t
*cb
, *tcb
;
807 spin_lock_irqsave(&cs
->lock
, flags
);
809 atomic_set(&cs
->mode
, M_UNKNOWN
);
810 atomic_set(&cs
->mstate
, MS_UNINITIALIZED
);
812 clear_at_state(&cs
->at_state
);
813 dealloc_at_states(cs
);
814 free_strings(&cs
->at_state
);
815 gigaset_at_init(&cs
->at_state
, NULL
, cs
, 0);
817 kfree(cs
->inbuf
->rcvbuf
);
818 cs
->inbuf
->rcvbuf
= NULL
;
819 cs
->inbuf
->inputstate
= INS_command
;
820 atomic_set(&cs
->inbuf
->head
, 0);
821 atomic_set(&cs
->inbuf
->tail
, 0);
829 cs
->cmdbuf
= cs
->lastcmdbuf
= NULL
;
835 atomic_set(&cs
->commands_pending
, 0);
838 spin_unlock_irqrestore(&cs
->lock
, flags
);
840 for (i
= 0; i
< cs
->channels
; ++i
) {
841 gigaset_freebcs(cs
->bcs
+ i
);
842 if (!gigaset_initbcs(cs
->bcs
+ i
, cs
, i
))
843 break; //FIXME error handling
847 cs
->cmd_result
= -ENODEV
;
849 wake_up_interruptible(&cs
->waitqueue
);
854 int gigaset_start(struct cardstate
*cs
)
858 if (mutex_lock_interruptible(&cs
->mutex
))
861 spin_lock_irqsave(&cs
->lock
, flags
);
863 spin_unlock_irqrestore(&cs
->lock
, flags
);
865 if (atomic_read(&cs
->mstate
) != MS_LOCKED
) {
866 cs
->ops
->set_modem_ctrl(cs
, 0, TIOCM_DTR
|TIOCM_RTS
);
867 cs
->ops
->baud_rate(cs
, B115200
);
868 cs
->ops
->set_line_ctrl(cs
, CS8
);
869 cs
->control_state
= TIOCM_DTR
|TIOCM_RTS
;
871 //FIXME use some saved values?
876 if (!gigaset_add_event(cs
, &cs
->at_state
, EV_START
, NULL
, 0, NULL
)) {
878 //FIXME what should we do?
882 gig_dbg(DEBUG_CMD
, "scheduling START");
883 gigaset_schedule_event(cs
);
885 wait_event(cs
->waitqueue
, !cs
->waiting
);
887 mutex_unlock(&cs
->mutex
);
891 mutex_unlock(&cs
->mutex
);
894 EXPORT_SYMBOL_GPL(gigaset_start
);
896 void gigaset_shutdown(struct cardstate
*cs
)
898 mutex_lock(&cs
->mutex
);
902 if (!gigaset_add_event(cs
, &cs
->at_state
, EV_SHUTDOWN
, NULL
, 0, NULL
)) {
903 //FIXME what should we do?
907 gig_dbg(DEBUG_CMD
, "scheduling SHUTDOWN");
908 gigaset_schedule_event(cs
);
910 wait_event(cs
->waitqueue
, !cs
->waiting
);
915 mutex_unlock(&cs
->mutex
);
917 EXPORT_SYMBOL_GPL(gigaset_shutdown
);
919 void gigaset_stop(struct cardstate
*cs
)
921 mutex_lock(&cs
->mutex
);
925 if (!gigaset_add_event(cs
, &cs
->at_state
, EV_STOP
, NULL
, 0, NULL
)) {
926 //FIXME what should we do?
930 gig_dbg(DEBUG_CMD
, "scheduling STOP");
931 gigaset_schedule_event(cs
);
933 wait_event(cs
->waitqueue
, !cs
->waiting
);
938 mutex_unlock(&cs
->mutex
);
940 EXPORT_SYMBOL_GPL(gigaset_stop
);
942 static LIST_HEAD(drivers
);
943 static DEFINE_SPINLOCK(driver_lock
);
945 struct cardstate
*gigaset_get_cs_by_id(int id
)
948 struct cardstate
*ret
= NULL
;
949 struct cardstate
*cs
;
950 struct gigaset_driver
*drv
;
953 spin_lock_irqsave(&driver_lock
, flags
);
954 list_for_each_entry(drv
, &drivers
, list
) {
955 spin_lock(&drv
->lock
);
956 for (i
= 0; i
< drv
->minors
; ++i
) {
957 if (drv
->flags
[i
] & VALID_ID
) {
965 spin_unlock(&drv
->lock
);
969 spin_unlock_irqrestore(&driver_lock
, flags
);
973 void gigaset_debugdrivers(void)
976 static struct cardstate
*cs
;
977 struct gigaset_driver
*drv
;
980 spin_lock_irqsave(&driver_lock
, flags
);
981 list_for_each_entry(drv
, &drivers
, list
) {
982 gig_dbg(DEBUG_DRIVER
, "driver %p", drv
);
983 spin_lock(&drv
->lock
);
984 for (i
= 0; i
< drv
->minors
; ++i
) {
985 gig_dbg(DEBUG_DRIVER
, " index %u", i
);
986 gig_dbg(DEBUG_DRIVER
, " flags 0x%02x",
989 gig_dbg(DEBUG_DRIVER
, " cardstate %p", cs
);
990 gig_dbg(DEBUG_DRIVER
, " minor_index %u",
992 gig_dbg(DEBUG_DRIVER
, " driver %p", cs
->driver
);
993 gig_dbg(DEBUG_DRIVER
, " i4l id %d", cs
->myid
);
995 spin_unlock(&drv
->lock
);
997 spin_unlock_irqrestore(&driver_lock
, flags
);
1000 static struct cardstate
*gigaset_get_cs_by_minor(unsigned minor
)
1002 unsigned long flags
;
1003 struct cardstate
*ret
= NULL
;
1004 struct gigaset_driver
*drv
;
1007 spin_lock_irqsave(&driver_lock
, flags
);
1008 list_for_each_entry(drv
, &drivers
, list
) {
1009 if (minor
< drv
->minor
|| minor
>= drv
->minor
+ drv
->minors
)
1011 index
= minor
- drv
->minor
;
1012 spin_lock(&drv
->lock
);
1013 if (drv
->flags
[index
] & VALID_MINOR
)
1014 ret
= drv
->cs
+ index
;
1015 spin_unlock(&drv
->lock
);
1019 spin_unlock_irqrestore(&driver_lock
, flags
);
1023 struct cardstate
*gigaset_get_cs_by_tty(struct tty_struct
*tty
)
1025 if (tty
->index
< 0 || tty
->index
>= tty
->driver
->num
)
1027 return gigaset_get_cs_by_minor(tty
->index
+ tty
->driver
->minor_start
);
1030 void gigaset_freedriver(struct gigaset_driver
*drv
)
1032 unsigned long flags
;
1034 spin_lock_irqsave(&driver_lock
, flags
);
1035 list_del(&drv
->list
);
1036 spin_unlock_irqrestore(&driver_lock
, flags
);
1038 gigaset_if_freedriver(drv
);
1044 EXPORT_SYMBOL_GPL(gigaset_freedriver
);
1046 /* gigaset_initdriver
1047 * Allocate and initialize gigaset_driver structure. Initialize interface.
1049 * minor First minor number
1050 * minors Number of minors this driver can handle
1051 * procname Name of the driver
1052 * devname Name of the device files (prefix without minor number)
1054 * Pointer to the gigaset_driver structure on success, NULL on failure.
1056 struct gigaset_driver
*gigaset_initdriver(unsigned minor
, unsigned minors
,
1057 const char *procname
,
1058 const char *devname
,
1059 const struct gigaset_ops
*ops
,
1060 struct module
*owner
)
1062 struct gigaset_driver
*drv
;
1063 unsigned long flags
;
1066 drv
= kmalloc(sizeof *drv
, GFP_KERNEL
);
1072 drv
->minors
= minors
;
1073 spin_lock_init(&drv
->lock
);
1077 INIT_LIST_HEAD(&drv
->list
);
1079 drv
->cs
= kmalloc(minors
* sizeof *drv
->cs
, GFP_KERNEL
);
1083 drv
->flags
= kmalloc(minors
* sizeof *drv
->flags
, GFP_KERNEL
);
1087 for (i
= 0; i
< minors
; ++i
) {
1089 drv
->cs
[i
].driver
= drv
;
1090 drv
->cs
[i
].ops
= drv
->ops
;
1091 drv
->cs
[i
].minor_index
= i
;
1094 gigaset_if_initdriver(drv
, procname
, devname
);
1096 spin_lock_irqsave(&driver_lock
, flags
);
1097 list_add(&drv
->list
, &drivers
);
1098 spin_unlock_irqrestore(&driver_lock
, flags
);
1107 EXPORT_SYMBOL_GPL(gigaset_initdriver
);
1109 /* For drivers without fixed assignment device<->cardstate (usb) */
1110 struct cardstate
*gigaset_getunassignedcs(struct gigaset_driver
*drv
)
1112 unsigned long flags
;
1113 struct cardstate
*cs
= NULL
;
1116 spin_lock_irqsave(&drv
->lock
, flags
);
1119 for (i
= 0; i
< drv
->minors
; ++i
) {
1120 if ((drv
->flags
[i
] & VALID_MINOR
) &&
1121 !(drv
->flags
[i
] & ASSIGNED
)) {
1122 drv
->flags
[i
] |= ASSIGNED
;
1128 spin_unlock_irqrestore(&drv
->lock
, flags
);
1131 EXPORT_SYMBOL_GPL(gigaset_getunassignedcs
);
1133 void gigaset_unassign(struct cardstate
*cs
)
1135 unsigned long flags
;
1136 unsigned *minor_flags
;
1137 struct gigaset_driver
*drv
;
1142 spin_lock_irqsave(&drv
->lock
, flags
);
1143 minor_flags
= drv
->flags
+ cs
->minor_index
;
1144 if (*minor_flags
& VALID_MINOR
)
1145 *minor_flags
&= ~ASSIGNED
;
1146 spin_unlock_irqrestore(&drv
->lock
, flags
);
1148 EXPORT_SYMBOL_GPL(gigaset_unassign
);
1150 void gigaset_blockdriver(struct gigaset_driver
*drv
)
1152 unsigned long flags
;
1153 spin_lock_irqsave(&drv
->lock
, flags
);
1155 spin_unlock_irqrestore(&drv
->lock
, flags
);
1157 EXPORT_SYMBOL_GPL(gigaset_blockdriver
);
1159 static int __init
gigaset_init_module(void)
1161 /* in accordance with the principle of least astonishment,
1162 * setting the 'debug' parameter to 1 activates a sensible
1163 * set of default debug levels
1165 if (gigaset_debuglevel
== 1)
1166 gigaset_debuglevel
= DEBUG_DEFAULT
;
1168 info(DRIVER_AUTHOR
);
1173 static void __exit
gigaset_exit_module(void)
1177 module_init(gigaset_init_module
);
1178 module_exit(gigaset_exit_module
);
1180 MODULE_AUTHOR(DRIVER_AUTHOR
);
1181 MODULE_DESCRIPTION(DRIVER_DESC
);
1183 MODULE_LICENSE("GPL");