2 * Stuff used by all variants of the driver
4 * Copyright (c) 2001 by Stefan Eilers <Eilers.Stefan@epost.de>,
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 <Eilers.Stefan@epost.de>"
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 /*======================================================================
32 Prototypes of internal functions
35 static struct cardstate
*alloc_cs(struct gigaset_driver
*drv
);
36 static void free_cs(struct cardstate
*cs
);
37 static void make_valid(struct cardstate
*cs
, unsigned mask
);
38 static void make_invalid(struct cardstate
*cs
, unsigned mask
);
40 #define VALID_MINOR 0x01
44 /* bitwise byte inversion table */
45 __u8 gigaset_invtab
[256] = {
46 0x00, 0x80, 0x40, 0xc0, 0x20, 0xa0, 0x60, 0xe0,
47 0x10, 0x90, 0x50, 0xd0, 0x30, 0xb0, 0x70, 0xf0,
48 0x08, 0x88, 0x48, 0xc8, 0x28, 0xa8, 0x68, 0xe8,
49 0x18, 0x98, 0x58, 0xd8, 0x38, 0xb8, 0x78, 0xf8,
50 0x04, 0x84, 0x44, 0xc4, 0x24, 0xa4, 0x64, 0xe4,
51 0x14, 0x94, 0x54, 0xd4, 0x34, 0xb4, 0x74, 0xf4,
52 0x0c, 0x8c, 0x4c, 0xcc, 0x2c, 0xac, 0x6c, 0xec,
53 0x1c, 0x9c, 0x5c, 0xdc, 0x3c, 0xbc, 0x7c, 0xfc,
54 0x02, 0x82, 0x42, 0xc2, 0x22, 0xa2, 0x62, 0xe2,
55 0x12, 0x92, 0x52, 0xd2, 0x32, 0xb2, 0x72, 0xf2,
56 0x0a, 0x8a, 0x4a, 0xca, 0x2a, 0xaa, 0x6a, 0xea,
57 0x1a, 0x9a, 0x5a, 0xda, 0x3a, 0xba, 0x7a, 0xfa,
58 0x06, 0x86, 0x46, 0xc6, 0x26, 0xa6, 0x66, 0xe6,
59 0x16, 0x96, 0x56, 0xd6, 0x36, 0xb6, 0x76, 0xf6,
60 0x0e, 0x8e, 0x4e, 0xce, 0x2e, 0xae, 0x6e, 0xee,
61 0x1e, 0x9e, 0x5e, 0xde, 0x3e, 0xbe, 0x7e, 0xfe,
62 0x01, 0x81, 0x41, 0xc1, 0x21, 0xa1, 0x61, 0xe1,
63 0x11, 0x91, 0x51, 0xd1, 0x31, 0xb1, 0x71, 0xf1,
64 0x09, 0x89, 0x49, 0xc9, 0x29, 0xa9, 0x69, 0xe9,
65 0x19, 0x99, 0x59, 0xd9, 0x39, 0xb9, 0x79, 0xf9,
66 0x05, 0x85, 0x45, 0xc5, 0x25, 0xa5, 0x65, 0xe5,
67 0x15, 0x95, 0x55, 0xd5, 0x35, 0xb5, 0x75, 0xf5,
68 0x0d, 0x8d, 0x4d, 0xcd, 0x2d, 0xad, 0x6d, 0xed,
69 0x1d, 0x9d, 0x5d, 0xdd, 0x3d, 0xbd, 0x7d, 0xfd,
70 0x03, 0x83, 0x43, 0xc3, 0x23, 0xa3, 0x63, 0xe3,
71 0x13, 0x93, 0x53, 0xd3, 0x33, 0xb3, 0x73, 0xf3,
72 0x0b, 0x8b, 0x4b, 0xcb, 0x2b, 0xab, 0x6b, 0xeb,
73 0x1b, 0x9b, 0x5b, 0xdb, 0x3b, 0xbb, 0x7b, 0xfb,
74 0x07, 0x87, 0x47, 0xc7, 0x27, 0xa7, 0x67, 0xe7,
75 0x17, 0x97, 0x57, 0xd7, 0x37, 0xb7, 0x77, 0xf7,
76 0x0f, 0x8f, 0x4f, 0xcf, 0x2f, 0xaf, 0x6f, 0xef,
77 0x1f, 0x9f, 0x5f, 0xdf, 0x3f, 0xbf, 0x7f, 0xff
79 EXPORT_SYMBOL_GPL(gigaset_invtab
);
81 void gigaset_dbg_buffer(enum debuglevel level
, const unsigned char *msg
,
82 size_t len
, const unsigned char *buf
, int from_user
)
84 unsigned char outbuf
[80];
85 unsigned char inbuf
[80 - 1];
88 const unsigned char *in
;
89 size_t space
= sizeof outbuf
- 1;
90 unsigned char *out
= outbuf
;
96 numin
= len
< sizeof inbuf
? len
: sizeof inbuf
;
98 if (copy_from_user(inbuf
, (const unsigned char __user
*) buf
,
100 gig_dbg(level
, "%s (%u bytes) - copy_from_user failed",
101 msg
, (unsigned) len
);
106 while (numin
-- > 0) {
108 if (c
== '~' || c
== '^' || c
== '\\') {
119 if (c
< 0x20 || c
== 0x7f) {
131 gig_dbg(level
, "%s (%u bytes): %s", msg
, (unsigned) len
, outbuf
);
133 EXPORT_SYMBOL_GPL(gigaset_dbg_buffer
);
135 static int setflags(struct cardstate
*cs
, unsigned flags
, unsigned delay
)
139 r
= cs
->ops
->set_modem_ctrl(cs
, cs
->control_state
, flags
);
140 cs
->control_state
= flags
;
145 set_current_state(TASK_INTERRUPTIBLE
);
146 schedule_timeout(delay
* HZ
/ 1000);
152 int gigaset_enterconfigmode(struct cardstate
*cs
)
156 if (!atomic_read(&cs
->connected
)) {
157 err("not connected!");
161 cs
->control_state
= TIOCM_RTS
; //FIXME
163 r
= setflags(cs
, TIOCM_DTR
, 200);
166 r
= setflags(cs
, 0, 200);
169 for (i
= 0; i
< 5; ++i
) {
170 r
= setflags(cs
, TIOCM_RTS
, 100);
173 r
= setflags(cs
, 0, 100);
177 r
= setflags(cs
, TIOCM_RTS
|TIOCM_DTR
, 800);
184 dev_err(cs
->dev
, "error %d on setuartbits\n", -r
);
185 cs
->control_state
= TIOCM_RTS
|TIOCM_DTR
; // FIXME is this a good value?
186 cs
->ops
->set_modem_ctrl(cs
, 0, TIOCM_RTS
|TIOCM_DTR
);
191 static int test_timeout(struct at_state_t
*at_state
)
193 if (!at_state
->timer_expires
)
196 if (--at_state
->timer_expires
) {
197 gig_dbg(DEBUG_MCMD
, "decreased timer of %p to %lu",
198 at_state
, at_state
->timer_expires
);
202 if (!gigaset_add_event(at_state
->cs
, at_state
, EV_TIMEOUT
, NULL
,
203 atomic_read(&at_state
->timer_index
), NULL
)) {
204 //FIXME what should we do?
210 static void timer_tick(unsigned long data
)
212 struct cardstate
*cs
= (struct cardstate
*) data
;
215 struct at_state_t
*at_state
;
218 spin_lock_irqsave(&cs
->lock
, flags
);
220 for (channel
= 0; channel
< cs
->channels
; ++channel
)
221 if (test_timeout(&cs
->bcs
[channel
].at_state
))
224 if (test_timeout(&cs
->at_state
))
227 list_for_each_entry(at_state
, &cs
->temp_at_states
, list
)
228 if (test_timeout(at_state
))
231 if (atomic_read(&cs
->running
)) {
232 mod_timer(&cs
->timer
, jiffies
+ msecs_to_jiffies(GIG_TICK
));
234 gig_dbg(DEBUG_CMD
, "scheduling timeout");
235 tasklet_schedule(&cs
->event_tasklet
);
239 spin_unlock_irqrestore(&cs
->lock
, flags
);
242 int gigaset_get_channel(struct bc_state
*bcs
)
246 spin_lock_irqsave(&bcs
->cs
->lock
, flags
);
247 if (bcs
->use_count
) {
248 gig_dbg(DEBUG_ANY
, "could not allocate channel %d",
250 spin_unlock_irqrestore(&bcs
->cs
->lock
, flags
);
255 gig_dbg(DEBUG_ANY
, "allocated channel %d", bcs
->channel
);
256 spin_unlock_irqrestore(&bcs
->cs
->lock
, flags
);
260 void gigaset_free_channel(struct bc_state
*bcs
)
264 spin_lock_irqsave(&bcs
->cs
->lock
, flags
);
266 gig_dbg(DEBUG_ANY
, "could not free channel %d", bcs
->channel
);
267 spin_unlock_irqrestore(&bcs
->cs
->lock
, flags
);
272 gig_dbg(DEBUG_ANY
, "freed channel %d", bcs
->channel
);
273 spin_unlock_irqrestore(&bcs
->cs
->lock
, flags
);
276 int gigaset_get_channels(struct cardstate
*cs
)
281 spin_lock_irqsave(&cs
->lock
, flags
);
282 for (i
= 0; i
< cs
->channels
; ++i
)
283 if (cs
->bcs
[i
].use_count
) {
284 spin_unlock_irqrestore(&cs
->lock
, flags
);
285 gig_dbg(DEBUG_ANY
, "could not allocate all channels");
288 for (i
= 0; i
< cs
->channels
; ++i
)
289 ++cs
->bcs
[i
].use_count
;
290 spin_unlock_irqrestore(&cs
->lock
, flags
);
292 gig_dbg(DEBUG_ANY
, "allocated all channels");
297 void gigaset_free_channels(struct cardstate
*cs
)
302 gig_dbg(DEBUG_ANY
, "unblocking all channels");
303 spin_lock_irqsave(&cs
->lock
, flags
);
304 for (i
= 0; i
< cs
->channels
; ++i
)
305 --cs
->bcs
[i
].use_count
;
306 spin_unlock_irqrestore(&cs
->lock
, flags
);
309 void gigaset_block_channels(struct cardstate
*cs
)
314 gig_dbg(DEBUG_ANY
, "blocking all channels");
315 spin_lock_irqsave(&cs
->lock
, flags
);
316 for (i
= 0; i
< cs
->channels
; ++i
)
317 ++cs
->bcs
[i
].use_count
;
318 spin_unlock_irqrestore(&cs
->lock
, flags
);
321 static void clear_events(struct cardstate
*cs
)
326 /* no locking needed (no reader/writer allowed) */
328 head
= atomic_read(&cs
->ev_head
);
329 tail
= atomic_read(&cs
->ev_tail
);
331 while (tail
!= head
) {
332 ev
= cs
->events
+ head
;
335 head
= (head
+ 1) % MAX_EVENTS
;
338 atomic_set(&cs
->ev_head
, tail
);
341 struct event_t
*gigaset_add_event(struct cardstate
*cs
,
342 struct at_state_t
*at_state
, int type
,
343 void *ptr
, int parameter
, void *arg
)
347 struct event_t
*event
= NULL
;
349 spin_lock_irqsave(&cs
->ev_lock
, flags
);
351 tail
= atomic_read(&cs
->ev_tail
);
352 next
= (tail
+ 1) % MAX_EVENTS
;
353 if (unlikely(next
== atomic_read(&cs
->ev_head
)))
354 err("event queue full");
356 event
= cs
->events
+ tail
;
358 event
->at_state
= at_state
;
362 event
->parameter
= parameter
;
363 atomic_set(&cs
->ev_tail
, next
);
366 spin_unlock_irqrestore(&cs
->ev_lock
, flags
);
370 EXPORT_SYMBOL_GPL(gigaset_add_event
);
372 static void free_strings(struct at_state_t
*at_state
)
376 for (i
= 0; i
< STR_NUM
; ++i
) {
377 kfree(at_state
->str_var
[i
]);
378 at_state
->str_var
[i
] = NULL
;
382 static void clear_at_state(struct at_state_t
*at_state
)
384 free_strings(at_state
);
387 static void dealloc_at_states(struct cardstate
*cs
)
389 struct at_state_t
*cur
, *next
;
391 list_for_each_entry_safe(cur
, next
, &cs
->temp_at_states
, list
) {
392 list_del(&cur
->list
);
398 static void gigaset_freebcs(struct bc_state
*bcs
)
402 gig_dbg(DEBUG_INIT
, "freeing bcs[%d]->hw", bcs
->channel
);
403 if (!bcs
->cs
->ops
->freebcshw(bcs
)) {
404 gig_dbg(DEBUG_INIT
, "failed");
407 gig_dbg(DEBUG_INIT
, "clearing bcs[%d]->at_state", bcs
->channel
);
408 clear_at_state(&bcs
->at_state
);
409 gig_dbg(DEBUG_INIT
, "freeing bcs[%d]->skb", bcs
->channel
);
412 dev_kfree_skb(bcs
->skb
);
413 for (i
= 0; i
< AT_NUM
; ++i
) {
414 kfree(bcs
->commands
[i
]);
415 bcs
->commands
[i
] = NULL
;
419 void gigaset_freecs(struct cardstate
*cs
)
434 spin_lock_irqsave(&cs
->lock
, flags
);
435 atomic_set(&cs
->running
, 0);
436 spin_unlock_irqrestore(&cs
->lock
, flags
); /* event handler and timer are
437 not rescheduled below */
439 tasklet_kill(&cs
->event_tasklet
);
440 del_timer_sync(&cs
->timer
);
442 switch (cs
->cs_init
) {
446 gig_dbg(DEBUG_INIT
, "clearing hw");
447 cs
->ops
->freecshw(cs
);
452 case 2: /* error in initcshw */
453 /* Deregister from LL */
454 make_invalid(cs
, VALID_ID
);
455 gig_dbg(DEBUG_INIT
, "clearing iif");
456 gigaset_i4l_cmd(cs
, ISDN_STAT_UNLOAD
);
459 case 1: /* error when regestering to LL */
460 gig_dbg(DEBUG_INIT
, "clearing at_state");
461 clear_at_state(&cs
->at_state
);
462 dealloc_at_states(cs
);
465 case 0: /* error in one call to initbcs */
466 for (i
= 0; i
< cs
->channels
; ++i
) {
467 gig_dbg(DEBUG_INIT
, "clearing bcs[%d]", i
);
468 gigaset_freebcs(cs
->bcs
+ i
);
472 gig_dbg(DEBUG_INIT
, "freeing inbuf");
475 f_bcs
: gig_dbg(DEBUG_INIT
, "freeing bcs[]");
477 f_cs
: gig_dbg(DEBUG_INIT
, "freeing cs");
481 EXPORT_SYMBOL_GPL(gigaset_freecs
);
483 void gigaset_at_init(struct at_state_t
*at_state
, struct bc_state
*bcs
,
484 struct cardstate
*cs
, int cid
)
488 INIT_LIST_HEAD(&at_state
->list
);
489 at_state
->waiting
= 0;
490 at_state
->getstring
= 0;
491 at_state
->pending_commands
= 0;
492 at_state
->timer_expires
= 0;
493 at_state
->timer_active
= 0;
494 atomic_set(&at_state
->timer_index
, 0);
495 atomic_set(&at_state
->seq_index
, 0);
496 at_state
->ConState
= 0;
497 for (i
= 0; i
< STR_NUM
; ++i
)
498 at_state
->str_var
[i
] = NULL
;
499 at_state
->int_var
[VAR_ZDLE
] = 0;
500 at_state
->int_var
[VAR_ZCTP
] = -1;
501 at_state
->int_var
[VAR_ZSAU
] = ZSAU_NULL
;
506 at_state
->replystruct
= cs
->tabnocid
;
508 at_state
->replystruct
= cs
->tabcid
;
512 static void gigaset_inbuf_init(struct inbuf_t
*inbuf
, struct bc_state
*bcs
,
513 struct cardstate
*cs
, int inputstate
)
514 /* inbuf->read must be allocated before! */
516 atomic_set(&inbuf
->head
, 0);
517 atomic_set(&inbuf
->tail
, 0);
519 inbuf
->bcs
= bcs
; /*base driver: NULL*/
520 inbuf
->rcvbuf
= NULL
; //FIXME
521 inbuf
->inputstate
= inputstate
;
524 /* Initialize the b-channel structure */
525 static struct bc_state
*gigaset_initbcs(struct bc_state
*bcs
,
526 struct cardstate
*cs
, int channel
)
530 bcs
->tx_skb
= NULL
; //FIXME -> hw part
532 skb_queue_head_init(&bcs
->squeue
);
538 gig_dbg(DEBUG_INIT
, "setting up bcs[%d]->at_state", channel
);
539 gigaset_at_init(&bcs
->at_state
, bcs
, cs
, -1);
543 #ifdef CONFIG_GIGASET_DEBUG
547 gig_dbg(DEBUG_INIT
, "allocating bcs[%d]->skb", channel
);
548 bcs
->fcs
= PPP_INITFCS
;
550 if (cs
->ignoreframes
) {
551 bcs
->inputstate
|= INS_skip_frame
;
553 } else if ((bcs
->skb
= dev_alloc_skb(SBUFSIZE
+ HW_HDR_LEN
)) != NULL
)
554 skb_reserve(bcs
->skb
, HW_HDR_LEN
);
556 dev_warn(cs
->dev
, "could not allocate skb\n");
557 bcs
->inputstate
|= INS_skip_frame
;
560 bcs
->channel
= channel
;
566 bcs
->ignore
= cs
->ignoreframes
;
568 for (i
= 0; i
< AT_NUM
; ++i
)
569 bcs
->commands
[i
] = NULL
;
571 gig_dbg(DEBUG_INIT
, " setting up bcs[%d]->hw", channel
);
572 if (cs
->ops
->initbcshw(bcs
))
575 gig_dbg(DEBUG_INIT
, " failed");
577 gig_dbg(DEBUG_INIT
, " freeing bcs[%d]->skb", channel
);
579 dev_kfree_skb(bcs
->skb
);
585 * Allocate and initialize cardstate structure for Gigaset driver
586 * Calls hardware dependent gigaset_initcshw() function
587 * Calls B channel initialization function gigaset_initbcs() for each B channel
589 * drv hardware driver the device belongs to
590 * channels number of B channels supported by device
591 * onechannel !=0: B channel data and AT commands share one
592 * communication channel
593 * ==0: B channels have separate communication channels
594 * ignoreframes number of frames to ignore after setting up B channel
595 * cidmode !=0: start in CallID mode
596 * modulename name of driver module (used for I4L registration)
598 * pointer to cardstate structure
600 struct cardstate
*gigaset_initcs(struct gigaset_driver
*drv
, int channels
,
601 int onechannel
, int ignoreframes
,
602 int cidmode
, const char *modulename
)
604 struct cardstate
*cs
= NULL
;
607 gig_dbg(DEBUG_INIT
, "allocating cs");
611 gig_dbg(DEBUG_INIT
, "allocating bcs[0..%d]", channels
- 1);
612 cs
->bcs
= kmalloc(channels
* sizeof(struct bc_state
), GFP_KERNEL
);
615 gig_dbg(DEBUG_INIT
, "allocating inbuf");
616 cs
->inbuf
= kmalloc(sizeof(struct inbuf_t
), GFP_KERNEL
);
621 cs
->channels
= channels
;
622 cs
->onechannel
= onechannel
;
623 cs
->ignoreframes
= ignoreframes
;
624 INIT_LIST_HEAD(&cs
->temp_at_states
);
625 atomic_set(&cs
->running
, 0);
626 init_timer(&cs
->timer
); /* clear next & prev */
627 spin_lock_init(&cs
->ev_lock
);
628 atomic_set(&cs
->ev_tail
, 0);
629 atomic_set(&cs
->ev_head
, 0);
630 init_MUTEX_LOCKED(&cs
->sem
);
631 tasklet_init(&cs
->event_tasklet
, &gigaset_handle_event
,
633 atomic_set(&cs
->commands_pending
, 0);
639 atomic_set(&cs
->cidmode
, cidmode
!= 0);
641 //if(onechannel) { //FIXME
642 cs
->tabnocid
= gigaset_tab_nocid_m10x
;
643 cs
->tabcid
= gigaset_tab_cid_m10x
;
645 // cs->tabnocid = gigaset_tab_nocid;
646 // cs->tabcid = gigaset_tab_cid;
649 init_waitqueue_head(&cs
->waitqueue
);
652 atomic_set(&cs
->mode
, M_UNKNOWN
);
653 atomic_set(&cs
->mstate
, MS_UNINITIALIZED
);
655 for (i
= 0; i
< channels
; ++i
) {
656 gig_dbg(DEBUG_INIT
, "setting up bcs[%d].read", i
);
657 if (!gigaset_initbcs(cs
->bcs
+ i
, cs
, i
))
663 gig_dbg(DEBUG_INIT
, "setting up at_state");
664 spin_lock_init(&cs
->lock
);
665 gigaset_at_init(&cs
->at_state
, NULL
, cs
, 0);
669 gig_dbg(DEBUG_INIT
, "setting up inbuf");
670 if (onechannel
) { //FIXME distinction necessary?
671 gigaset_inbuf_init(cs
->inbuf
, cs
->bcs
, cs
, INS_command
);
673 gigaset_inbuf_init(cs
->inbuf
, NULL
, cs
, INS_command
);
675 atomic_set(&cs
->connected
, 0);
677 gig_dbg(DEBUG_INIT
, "setting up cmdbuf");
678 cs
->cmdbuf
= cs
->lastcmdbuf
= NULL
;
679 spin_lock_init(&cs
->cmdlock
);
683 gig_dbg(DEBUG_INIT
, "setting up iif");
684 if (!gigaset_register_to_LL(cs
, modulename
)) {
685 err("register_isdn failed");
689 make_valid(cs
, VALID_ID
);
691 gig_dbg(DEBUG_INIT
, "setting up hw");
692 if (!cs
->ops
->initcshw(cs
))
699 atomic_set(&cs
->running
, 1);
700 setup_timer(&cs
->timer
, timer_tick
, (unsigned long) cs
);
701 cs
->timer
.expires
= jiffies
+ msecs_to_jiffies(GIG_TICK
);
702 /* FIXME: can jiffies increase too much until the timer is added?
703 * Same problem(?) with mod_timer() in timer_tick(). */
704 add_timer(&cs
->timer
);
706 gig_dbg(DEBUG_INIT
, "cs initialized");
712 gig_dbg(DEBUG_INIT
, "failed");
716 EXPORT_SYMBOL_GPL(gigaset_initcs
);
718 /* ReInitialize the b-channel structure */
719 /* e.g. called on hangup, disconnect */
720 void gigaset_bcs_reinit(struct bc_state
*bcs
)
723 struct cardstate
*cs
= bcs
->cs
;
726 while ((skb
= skb_dequeue(&bcs
->squeue
)) != NULL
)
729 spin_lock_irqsave(&cs
->lock
, flags
);
730 clear_at_state(&bcs
->at_state
);
731 bcs
->at_state
.ConState
= 0;
732 bcs
->at_state
.timer_active
= 0;
733 bcs
->at_state
.timer_expires
= 0;
734 bcs
->at_state
.cid
= -1; /* No CID defined */
735 spin_unlock_irqrestore(&cs
->lock
, flags
);
739 #ifdef CONFIG_GIGASET_DEBUG
743 bcs
->fcs
= PPP_INITFCS
;
746 bcs
->ignore
= cs
->ignoreframes
;
748 bcs
->inputstate
|= INS_skip_frame
;
751 cs
->ops
->reinitbcshw(bcs
);
754 static void cleanup_cs(struct cardstate
*cs
)
756 struct cmdbuf_t
*cb
, *tcb
;
760 spin_lock_irqsave(&cs
->lock
, flags
);
762 atomic_set(&cs
->mode
, M_UNKNOWN
);
763 atomic_set(&cs
->mstate
, MS_UNINITIALIZED
);
765 clear_at_state(&cs
->at_state
);
766 dealloc_at_states(cs
);
767 free_strings(&cs
->at_state
);
768 gigaset_at_init(&cs
->at_state
, NULL
, cs
, 0);
770 kfree(cs
->inbuf
->rcvbuf
);
771 cs
->inbuf
->rcvbuf
= NULL
;
772 cs
->inbuf
->inputstate
= INS_command
;
773 atomic_set(&cs
->inbuf
->head
, 0);
774 atomic_set(&cs
->inbuf
->tail
, 0);
782 cs
->cmdbuf
= cs
->lastcmdbuf
= NULL
;
788 atomic_set(&cs
->commands_pending
, 0);
791 spin_unlock_irqrestore(&cs
->lock
, flags
);
793 for (i
= 0; i
< cs
->channels
; ++i
) {
794 gigaset_freebcs(cs
->bcs
+ i
);
795 if (!gigaset_initbcs(cs
->bcs
+ i
, cs
, i
))
796 break; //FIXME error handling
800 cs
->cmd_result
= -ENODEV
;
802 wake_up_interruptible(&cs
->waitqueue
);
807 int gigaset_start(struct cardstate
*cs
)
809 if (down_interruptible(&cs
->sem
))
812 atomic_set(&cs
->connected
, 1);
814 if (atomic_read(&cs
->mstate
) != MS_LOCKED
) {
815 cs
->ops
->set_modem_ctrl(cs
, 0, TIOCM_DTR
|TIOCM_RTS
);
816 cs
->ops
->baud_rate(cs
, B115200
);
817 cs
->ops
->set_line_ctrl(cs
, CS8
);
818 cs
->control_state
= TIOCM_DTR
|TIOCM_RTS
;
820 //FIXME use some saved values?
825 if (!gigaset_add_event(cs
, &cs
->at_state
, EV_START
, NULL
, 0, NULL
)) {
827 //FIXME what should we do?
831 gig_dbg(DEBUG_CMD
, "scheduling START");
832 gigaset_schedule_event(cs
);
834 wait_event(cs
->waitqueue
, !cs
->waiting
);
836 /* set up device sysfs */
837 gigaset_init_dev_sysfs(cs
);
846 EXPORT_SYMBOL_GPL(gigaset_start
);
848 void gigaset_shutdown(struct cardstate
*cs
)
854 if (!gigaset_add_event(cs
, &cs
->at_state
, EV_SHUTDOWN
, NULL
, 0, NULL
)) {
855 //FIXME what should we do?
859 gig_dbg(DEBUG_CMD
, "scheduling SHUTDOWN");
860 gigaset_schedule_event(cs
);
862 if (wait_event_interruptible(cs
->waitqueue
, !cs
->waiting
)) {
863 warn("%s: aborted", __func__
);
867 if (atomic_read(&cs
->mstate
) != MS_LOCKED
) {
869 //gigaset_baud_rate(cs, B115200);
870 //gigaset_set_line_ctrl(cs, CS8);
871 //gigaset_set_modem_ctrl(cs, TIOCM_DTR|TIOCM_RTS, 0);
872 //cs->control_state = 0;
874 //FIXME use some saved values?
882 EXPORT_SYMBOL_GPL(gigaset_shutdown
);
884 void gigaset_stop(struct cardstate
*cs
)
888 /* clear device sysfs */
889 gigaset_free_dev_sysfs(cs
);
891 atomic_set(&cs
->connected
, 0);
895 if (!gigaset_add_event(cs
, &cs
->at_state
, EV_STOP
, NULL
, 0, NULL
)) {
896 //FIXME what should we do?
900 gig_dbg(DEBUG_CMD
, "scheduling STOP");
901 gigaset_schedule_event(cs
);
903 if (wait_event_interruptible(cs
->waitqueue
, !cs
->waiting
)) {
904 warn("%s: aborted", __func__
);
908 /* Tell the LL that the device is not available .. */
909 gigaset_i4l_cmd(cs
, ISDN_STAT_STOP
); // FIXME move to event layer?
916 EXPORT_SYMBOL_GPL(gigaset_stop
);
918 static LIST_HEAD(drivers
);
919 static spinlock_t driver_lock
= SPIN_LOCK_UNLOCKED
;
921 struct cardstate
*gigaset_get_cs_by_id(int id
)
924 static struct cardstate
*ret
= NULL
;
925 static struct cardstate
*cs
;
926 struct gigaset_driver
*drv
;
929 spin_lock_irqsave(&driver_lock
, flags
);
930 list_for_each_entry(drv
, &drivers
, list
) {
931 spin_lock(&drv
->lock
);
932 for (i
= 0; i
< drv
->minors
; ++i
) {
933 if (drv
->flags
[i
] & VALID_ID
) {
941 spin_unlock(&drv
->lock
);
945 spin_unlock_irqrestore(&driver_lock
, flags
);
949 void gigaset_debugdrivers(void)
952 static struct cardstate
*cs
;
953 struct gigaset_driver
*drv
;
956 spin_lock_irqsave(&driver_lock
, flags
);
957 list_for_each_entry(drv
, &drivers
, list
) {
958 gig_dbg(DEBUG_DRIVER
, "driver %p", drv
);
959 spin_lock(&drv
->lock
);
960 for (i
= 0; i
< drv
->minors
; ++i
) {
961 gig_dbg(DEBUG_DRIVER
, " index %u", i
);
962 gig_dbg(DEBUG_DRIVER
, " flags 0x%02x",
965 gig_dbg(DEBUG_DRIVER
, " cardstate %p", cs
);
966 gig_dbg(DEBUG_DRIVER
, " minor_index %u",
968 gig_dbg(DEBUG_DRIVER
, " driver %p", cs
->driver
);
969 gig_dbg(DEBUG_DRIVER
, " i4l id %d", cs
->myid
);
971 spin_unlock(&drv
->lock
);
973 spin_unlock_irqrestore(&driver_lock
, flags
);
975 EXPORT_SYMBOL_GPL(gigaset_debugdrivers
);
977 struct cardstate
*gigaset_get_cs_by_tty(struct tty_struct
*tty
)
979 if (tty
->index
< 0 || tty
->index
>= tty
->driver
->num
)
981 return gigaset_get_cs_by_minor(tty
->index
+ tty
->driver
->minor_start
);
984 struct cardstate
*gigaset_get_cs_by_minor(unsigned minor
)
987 static struct cardstate
*ret
= NULL
;
988 struct gigaset_driver
*drv
;
991 spin_lock_irqsave(&driver_lock
, flags
);
992 list_for_each_entry(drv
, &drivers
, list
) {
993 if (minor
< drv
->minor
|| minor
>= drv
->minor
+ drv
->minors
)
995 index
= minor
- drv
->minor
;
996 spin_lock(&drv
->lock
);
997 if (drv
->flags
[index
] & VALID_MINOR
)
998 ret
= drv
->cs
+ index
;
999 spin_unlock(&drv
->lock
);
1003 spin_unlock_irqrestore(&driver_lock
, flags
);
1007 void gigaset_freedriver(struct gigaset_driver
*drv
)
1009 unsigned long flags
;
1011 spin_lock_irqsave(&driver_lock
, flags
);
1012 list_del(&drv
->list
);
1013 spin_unlock_irqrestore(&driver_lock
, flags
);
1015 gigaset_if_freedriver(drv
);
1016 module_put(drv
->owner
);
1022 EXPORT_SYMBOL_GPL(gigaset_freedriver
);
1024 /* gigaset_initdriver
1025 * Allocate and initialize gigaset_driver structure. Initialize interface.
1027 * minor First minor number
1028 * minors Number of minors this driver can handle
1029 * procname Name of the driver
1030 * devname Name of the device files (prefix without minor number)
1031 * devfsname Devfs name of the device files without %d
1033 * Pointer to the gigaset_driver structure on success, NULL on failure.
1035 struct gigaset_driver
*gigaset_initdriver(unsigned minor
, unsigned minors
,
1036 const char *procname
,
1037 const char *devname
,
1038 const char *devfsname
,
1039 const struct gigaset_ops
*ops
,
1040 struct module
*owner
)
1042 struct gigaset_driver
*drv
;
1043 unsigned long flags
;
1046 drv
= kmalloc(sizeof *drv
, GFP_KERNEL
);
1049 if (!try_module_get(owner
))
1055 drv
->minors
= minors
;
1056 spin_lock_init(&drv
->lock
);
1060 INIT_LIST_HEAD(&drv
->list
);
1062 drv
->cs
= kmalloc(minors
* sizeof *drv
->cs
, GFP_KERNEL
);
1065 drv
->flags
= kmalloc(minors
* sizeof *drv
->flags
, GFP_KERNEL
);
1069 for (i
= 0; i
< minors
; ++i
) {
1071 drv
->cs
[i
].driver
= drv
;
1072 drv
->cs
[i
].ops
= drv
->ops
;
1073 drv
->cs
[i
].minor_index
= i
;
1076 gigaset_if_initdriver(drv
, procname
, devname
, devfsname
);
1078 spin_lock_irqsave(&driver_lock
, flags
);
1079 list_add(&drv
->list
, &drivers
);
1080 spin_unlock_irqrestore(&driver_lock
, flags
);
1091 EXPORT_SYMBOL_GPL(gigaset_initdriver
);
1093 static struct cardstate
*alloc_cs(struct gigaset_driver
*drv
)
1095 unsigned long flags
;
1097 static struct cardstate
*ret
= NULL
;
1099 spin_lock_irqsave(&drv
->lock
, flags
);
1100 for (i
= 0; i
< drv
->minors
; ++i
) {
1101 if (!(drv
->flags
[i
] & VALID_MINOR
)) {
1102 drv
->flags
[i
] = VALID_MINOR
;
1108 spin_unlock_irqrestore(&drv
->lock
, flags
);
1112 static void free_cs(struct cardstate
*cs
)
1114 unsigned long flags
;
1115 struct gigaset_driver
*drv
= cs
->driver
;
1116 spin_lock_irqsave(&drv
->lock
, flags
);
1117 drv
->flags
[cs
->minor_index
] = 0;
1118 spin_unlock_irqrestore(&drv
->lock
, flags
);
1121 static void make_valid(struct cardstate
*cs
, unsigned mask
)
1123 unsigned long flags
;
1124 struct gigaset_driver
*drv
= cs
->driver
;
1125 spin_lock_irqsave(&drv
->lock
, flags
);
1126 drv
->flags
[cs
->minor_index
] |= mask
;
1127 spin_unlock_irqrestore(&drv
->lock
, flags
);
1130 static void make_invalid(struct cardstate
*cs
, unsigned mask
)
1132 unsigned long flags
;
1133 struct gigaset_driver
*drv
= cs
->driver
;
1134 spin_lock_irqsave(&drv
->lock
, flags
);
1135 drv
->flags
[cs
->minor_index
] &= ~mask
;
1136 spin_unlock_irqrestore(&drv
->lock
, flags
);
1139 /* For drivers without fixed assignment device<->cardstate (usb) */
1140 struct cardstate
*gigaset_getunassignedcs(struct gigaset_driver
*drv
)
1142 unsigned long flags
;
1143 struct cardstate
*cs
= NULL
;
1146 spin_lock_irqsave(&drv
->lock
, flags
);
1149 for (i
= 0; i
< drv
->minors
; ++i
) {
1150 if ((drv
->flags
[i
] & VALID_MINOR
) &&
1151 !(drv
->flags
[i
] & ASSIGNED
)) {
1152 drv
->flags
[i
] |= ASSIGNED
;
1158 spin_unlock_irqrestore(&drv
->lock
, flags
);
1161 EXPORT_SYMBOL_GPL(gigaset_getunassignedcs
);
1163 void gigaset_unassign(struct cardstate
*cs
)
1165 unsigned long flags
;
1166 unsigned *minor_flags
;
1167 struct gigaset_driver
*drv
;
1172 spin_lock_irqsave(&drv
->lock
, flags
);
1173 minor_flags
= drv
->flags
+ cs
->minor_index
;
1174 if (*minor_flags
& VALID_MINOR
)
1175 *minor_flags
&= ~ASSIGNED
;
1176 spin_unlock_irqrestore(&drv
->lock
, flags
);
1178 EXPORT_SYMBOL_GPL(gigaset_unassign
);
1180 void gigaset_blockdriver(struct gigaset_driver
*drv
)
1182 unsigned long flags
;
1183 spin_lock_irqsave(&drv
->lock
, flags
);
1185 spin_unlock_irqrestore(&drv
->lock
, flags
);
1187 EXPORT_SYMBOL_GPL(gigaset_blockdriver
);
1189 static int __init
gigaset_init_module(void)
1191 /* in accordance with the principle of least astonishment,
1192 * setting the 'debug' parameter to 1 activates a sensible
1193 * set of default debug levels
1195 if (gigaset_debuglevel
== 1)
1196 gigaset_debuglevel
= DEBUG_DEFAULT
;
1198 info(DRIVER_AUTHOR
);
1203 static void __exit
gigaset_exit_module(void)
1207 module_init(gigaset_init_module
);
1208 module_exit(gigaset_exit_module
);
1210 MODULE_AUTHOR(DRIVER_AUTHOR
);
1211 MODULE_DESCRIPTION(DRIVER_DESC
);
1213 MODULE_LICENSE("GPL");
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