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GUI: Fix Tomato RAF theme for all builds. Compilation typo.
[tomato.git] / release / src-rt-6.x.4708 / linux / linux-2.6.36 / drivers / isdn / gigaset / bas-gigaset.c
blobfe08292fd666ac646ef1d68e726b78b945ae4e12
1 /*
2 * USB driver for Gigaset 307x base via direct USB connection.
3 *
4 * Copyright (c) 2001 by Hansjoerg Lipp <hjlipp@web.de>,
5 * Tilman Schmidt <tilman@imap.cc>,
6 * Stefan Eilers.
7 *
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 * =====================================================================
14 */
15
16 #include "gigaset.h"
17 #include <linux/usb.h>
18 #include <linux/module.h>
19 #include <linux/moduleparam.h>
20
21 /* Version Information */
22 #define DRIVER_AUTHOR "Tilman Schmidt <tilman@imap.cc>, Hansjoerg Lipp <hjlipp@web.de>, Stefan Eilers"
23 #define DRIVER_DESC "USB Driver for Gigaset 307x"
24
25
26 /* Module parameters */
27
28 static int startmode = SM_ISDN;
29 static int cidmode = 1;
30
31 module_param(startmode, int, S_IRUGO);
32 module_param(cidmode, int, S_IRUGO);
33 MODULE_PARM_DESC(startmode, "start in isdn4linux mode");
34 MODULE_PARM_DESC(cidmode, "Call-ID mode");
35
36 #define GIGASET_MINORS 1
37 #define GIGASET_MINOR 16
38 #define GIGASET_MODULENAME "bas_gigaset"
39 #define GIGASET_DEVNAME "ttyGB"
40
41 /* length limit according to Siemens 3070usb-protokoll.doc ch. 2.1 */
42 #define IF_WRITEBUF 264
43
44 /* interrupt pipe message size according to ibid. ch. 2.2 */
45 #define IP_MSGSIZE 3
46
47 /* Values for the Gigaset 307x */
48 #define USB_GIGA_VENDOR_ID 0x0681
49 #define USB_3070_PRODUCT_ID 0x0001
50 #define USB_3075_PRODUCT_ID 0x0002
51 #define USB_SX303_PRODUCT_ID 0x0021
52 #define USB_SX353_PRODUCT_ID 0x0022
53
54 /* table of devices that work with this driver */
55 static const struct usb_device_id gigaset_table[] = {
56 { USB_DEVICE(USB_GIGA_VENDOR_ID, USB_3070_PRODUCT_ID) },
57 { USB_DEVICE(USB_GIGA_VENDOR_ID, USB_3075_PRODUCT_ID) },
58 { USB_DEVICE(USB_GIGA_VENDOR_ID, USB_SX303_PRODUCT_ID) },
59 { USB_DEVICE(USB_GIGA_VENDOR_ID, USB_SX353_PRODUCT_ID) },
60 { } /* Terminating entry */
61 };
62
63 MODULE_DEVICE_TABLE(usb, gigaset_table);
64
65 /*======================= local function prototypes ==========================*/
66
67 /* function called if a new device belonging to this driver is connected */
68 static int gigaset_probe(struct usb_interface *interface,
69 const struct usb_device_id *id);
70
71 /* Function will be called if the device is unplugged */
72 static void gigaset_disconnect(struct usb_interface *interface);
73
74 /* functions called before/after suspend */
75 static int gigaset_suspend(struct usb_interface *intf, pm_message_t message);
76 static int gigaset_resume(struct usb_interface *intf);
77
78 /* functions called before/after device reset */
79 static int gigaset_pre_reset(struct usb_interface *intf);
80 static int gigaset_post_reset(struct usb_interface *intf);
81
82 static int atread_submit(struct cardstate *, int);
83 static void stopurbs(struct bas_bc_state *);
84 static int req_submit(struct bc_state *, int, int, int);
85 static int atwrite_submit(struct cardstate *, unsigned char *, int);
86 static int start_cbsend(struct cardstate *);
87
88 /*============================================================================*/
89
90 struct bas_cardstate {
91 struct usb_device *udev; /* USB device pointer */
92 struct usb_interface *interface; /* interface for this device */
93 unsigned char minor; /* starting minor number */
94
95 struct urb *urb_ctrl; /* control pipe default URB */
96 struct usb_ctrlrequest dr_ctrl;
97 struct timer_list timer_ctrl; /* control request timeout */
98 int retry_ctrl;
99
100 struct timer_list timer_atrdy; /* AT command ready timeout */
101 struct urb *urb_cmd_out; /* for sending AT commands */
102 struct usb_ctrlrequest dr_cmd_out;
103 int retry_cmd_out;
104
105 struct urb *urb_cmd_in; /* for receiving AT replies */
106 struct usb_ctrlrequest dr_cmd_in;
107 struct timer_list timer_cmd_in; /* receive request timeout */
108 unsigned char *rcvbuf; /* AT reply receive buffer */
109
110 struct urb *urb_int_in; /* URB for interrupt pipe */
111 unsigned char *int_in_buf;
112
113 spinlock_t lock; /* locks all following */
114 int basstate; /* bitmap (BS_*) */
115 int pending; /* uncompleted base request */
116 wait_queue_head_t waitqueue;
117 int rcvbuf_size; /* size of AT receive buffer */
118 /* 0: no receive in progress */
119 int retry_cmd_in; /* receive req retry count */
120 };
121
122 /* status of direct USB connection to 307x base (bits in basstate) */
123 #define BS_ATOPEN 0x001 /* AT channel open */
124 #define BS_B1OPEN 0x002 /* B channel 1 open */
125 #define BS_B2OPEN 0x004 /* B channel 2 open */
126 #define BS_ATREADY 0x008 /* base ready for AT command */
127 #define BS_INIT 0x010 /* base has signalled INIT_OK */
128 #define BS_ATTIMER 0x020 /* waiting for HD_READY_SEND_ATDATA */
129 #define BS_ATRDPEND 0x040 /* urb_cmd_in in use */
130 #define BS_ATWRPEND 0x080 /* urb_cmd_out in use */
131 #define BS_SUSPEND 0x100 /* USB port suspended */
132 #define BS_RESETTING 0x200 /* waiting for HD_RESET_INTERRUPT_PIPE_ACK */
133
134
135 static struct gigaset_driver *driver;
136
137 /* usb specific object needed to register this driver with the usb subsystem */
138 static struct usb_driver gigaset_usb_driver = {
139 .name = GIGASET_MODULENAME,
140 .probe = gigaset_probe,
141 .disconnect = gigaset_disconnect,
142 .id_table = gigaset_table,
143 .suspend = gigaset_suspend,
144 .resume = gigaset_resume,
145 .reset_resume = gigaset_post_reset,
146 .pre_reset = gigaset_pre_reset,
147 .post_reset = gigaset_post_reset,
148 };
149
150 /* get message text for usb_submit_urb return code
151 */
152 static char *get_usb_rcmsg(int rc)
153 {
154 static char unkmsg[28];
155
156 switch (rc) {
157 case 0:
158 return "success";
159 case -ENOMEM:
160 return "out of memory";
161 case -ENODEV:
162 return "device not present";
163 case -ENOENT:
164 return "endpoint not present";
165 case -ENXIO:
166 return "URB type not supported";
167 case -EINVAL:
168 return "invalid argument";
169 case -EAGAIN:
170 return "start frame too early or too much scheduled";
171 case -EFBIG:
172 return "too many isochronous frames requested";
173 case -EPIPE:
174 return "endpoint stalled";
175 case -EMSGSIZE:
176 return "invalid packet size";
177 case -ENOSPC:
178 return "would overcommit USB bandwidth";
179 case -ESHUTDOWN:
180 return "device shut down";
181 case -EPERM:
182 return "reject flag set";
183 case -EHOSTUNREACH:
184 return "device suspended";
185 default:
186 snprintf(unkmsg, sizeof(unkmsg), "unknown error %d", rc);
187 return unkmsg;
188 }
189 }
190
191 /* get message text for USB status code
192 */
193 static char *get_usb_statmsg(int status)
194 {
195 static char unkmsg[28];
196
197 switch (status) {
198 case 0:
199 return "success";
200 case -ENOENT:
201 return "unlinked (sync)";
202 case -EINPROGRESS:
203 return "pending";
204 case -EPROTO:
205 return "bit stuffing error, timeout, or unknown USB error";
206 case -EILSEQ:
207 return "CRC mismatch, timeout, or unknown USB error";
208 case -ETIME:
209 return "timed out";
210 case -EPIPE:
211 return "endpoint stalled";
212 case -ECOMM:
213 return "IN buffer overrun";
214 case -ENOSR:
215 return "OUT buffer underrun";
216 case -EOVERFLOW:
217 return "too much data";
218 case -EREMOTEIO:
219 return "short packet detected";
220 case -ENODEV:
221 return "device removed";
222 case -EXDEV:
223 return "partial isochronous transfer";
224 case -EINVAL:
225 return "invalid argument";
226 case -ECONNRESET:
227 return "unlinked (async)";
228 case -ESHUTDOWN:
229 return "device shut down";
230 default:
231 snprintf(unkmsg, sizeof(unkmsg), "unknown status %d", status);
232 return unkmsg;
233 }
234 }
235
236 /* usb_pipetype_str
237 * retrieve string representation of USB pipe type
238 */
239 static inline char *usb_pipetype_str(int pipe)
240 {
241 if (usb_pipeisoc(pipe))
242 return "Isoc";
243 if (usb_pipeint(pipe))
244 return "Int";
245 if (usb_pipecontrol(pipe))
246 return "Ctrl";
247 if (usb_pipebulk(pipe))
248 return "Bulk";
249 return "?";
250 }
251
252 /* dump_urb
253 * write content of URB to syslog for debugging
254 */
255 static inline void dump_urb(enum debuglevel level, const char *tag,
256 struct urb *urb)
257 {
258 #ifdef CONFIG_GIGASET_DEBUG
259 int i;
260 gig_dbg(level, "%s urb(0x%08lx)->{", tag, (unsigned long) urb);
261 if (urb) {
262 gig_dbg(level,
263 " dev=0x%08lx, pipe=%s:EP%d/DV%d:%s, "
264 "hcpriv=0x%08lx, transfer_flags=0x%x,",
265 (unsigned long) urb->dev,
266 usb_pipetype_str(urb->pipe),
267 usb_pipeendpoint(urb->pipe), usb_pipedevice(urb->pipe),
268 usb_pipein(urb->pipe) ? "in" : "out",
269 (unsigned long) urb->hcpriv,
270 urb->transfer_flags);
271 gig_dbg(level,
272 " transfer_buffer=0x%08lx[%d], actual_length=%d, "
273 "setup_packet=0x%08lx,",
274 (unsigned long) urb->transfer_buffer,
275 urb->transfer_buffer_length, urb->actual_length,
276 (unsigned long) urb->setup_packet);
277 gig_dbg(level,
278 " start_frame=%d, number_of_packets=%d, interval=%d, "
279 "error_count=%d,",
280 urb->start_frame, urb->number_of_packets, urb->interval,
281 urb->error_count);
282 gig_dbg(level,
283 " context=0x%08lx, complete=0x%08lx, "
284 "iso_frame_desc[]={",
285 (unsigned long) urb->context,
286 (unsigned long) urb->complete);
287 for (i = 0; i < urb->number_of_packets; i++) {
288 struct usb_iso_packet_descriptor *pifd
289 = &urb->iso_frame_desc[i];
290 gig_dbg(level,
291 " {offset=%u, length=%u, actual_length=%u, "
292 "status=%u}",
293 pifd->offset, pifd->length, pifd->actual_length,
294 pifd->status);
295 }
296 }
297 gig_dbg(level, "}}");
298 #endif
299 }
300
301 /* read/set modem control bits etc. (m10x only) */
302 static int gigaset_set_modem_ctrl(struct cardstate *cs, unsigned old_state,
303 unsigned new_state)
304 {
305 return -EINVAL;
306 }
307
308 static int gigaset_baud_rate(struct cardstate *cs, unsigned cflag)
309 {
310 return -EINVAL;
311 }
312
313 static int gigaset_set_line_ctrl(struct cardstate *cs, unsigned cflag)
314 {
315 return -EINVAL;
316 }
317
318 /* set/clear bits in base connection state, return previous state
319 */
320 static inline int update_basstate(struct bas_cardstate *ucs,
321 int set, int clear)
322 {
323 unsigned long flags;
324 int state;
325
326 spin_lock_irqsave(&ucs->lock, flags);
327 state = ucs->basstate;
328 ucs->basstate = (state & ~clear) | set;
329 spin_unlock_irqrestore(&ucs->lock, flags);
330 return state;
331 }
332
333 /* error_hangup
334 * hang up any existing connection because of an unrecoverable error
335 * This function may be called from any context and takes care of scheduling
336 * the necessary actions for execution outside of interrupt context.
337 * cs->lock must not be held.
338 * argument:
339 * B channel control structure
340 */
341 static inline void error_hangup(struct bc_state *bcs)
342 {
343 struct cardstate *cs = bcs->cs;
344
345 gigaset_add_event(cs, &bcs->at_state, EV_HUP, NULL, 0, NULL);
346 gigaset_schedule_event(cs);
347 }
348
349 /* error_reset
350 * reset Gigaset device because of an unrecoverable error
351 * This function may be called from any context, and takes care of
352 * scheduling the necessary actions for execution outside of interrupt context.
353 * cs->lock must not be held.
354 * argument:
355 * controller state structure
356 */
357 static inline void error_reset(struct cardstate *cs)
358 {
359 /* reset interrupt pipe to recover (ignore errors) */
360 update_basstate(cs->hw.bas, BS_RESETTING, 0);
361 req_submit(cs->bcs, HD_RESET_INTERRUPT_PIPE, 0, BAS_TIMEOUT);
362 }
363
364 /* check_pending
365 * check for completion of pending control request
366 * parameter:
367 * ucs hardware specific controller state structure
368 */
369 static void check_pending(struct bas_cardstate *ucs)
370 {
371 unsigned long flags;
372
373 spin_lock_irqsave(&ucs->lock, flags);
374 switch (ucs->pending) {
375 case 0:
376 break;
377 case HD_OPEN_ATCHANNEL:
378 if (ucs->basstate & BS_ATOPEN)
379 ucs->pending = 0;
380 break;
381 case HD_OPEN_B1CHANNEL:
382 if (ucs->basstate & BS_B1OPEN)
383 ucs->pending = 0;
384 break;
385 case HD_OPEN_B2CHANNEL:
386 if (ucs->basstate & BS_B2OPEN)
387 ucs->pending = 0;
388 break;
389 case HD_CLOSE_ATCHANNEL:
390 if (!(ucs->basstate & BS_ATOPEN))
391 ucs->pending = 0;
392 break;
393 case HD_CLOSE_B1CHANNEL:
394 if (!(ucs->basstate & BS_B1OPEN))
395 ucs->pending = 0;
396 break;
397 case HD_CLOSE_B2CHANNEL:
398 if (!(ucs->basstate & BS_B2OPEN))
399 ucs->pending = 0;
400 break;
401 case HD_DEVICE_INIT_ACK: /* no reply expected */
402 ucs->pending = 0;
403 break;
404 case HD_RESET_INTERRUPT_PIPE:
405 if (!(ucs->basstate & BS_RESETTING))
406 ucs->pending = 0;
407 break;
408 /*
409 * HD_READ_ATMESSAGE and HD_WRITE_ATMESSAGE are handled separately
410 * and should never end up here
411 */
412 default:
413 dev_warn(&ucs->interface->dev,
414 "unknown pending request 0x%02x cleared\n",
415 ucs->pending);
416 ucs->pending = 0;
417 }
418
419 if (!ucs->pending)
420 del_timer(&ucs->timer_ctrl);
421
422 spin_unlock_irqrestore(&ucs->lock, flags);
423 }
424
425 /* cmd_in_timeout
426 * timeout routine for command input request
427 * argument:
428 * controller state structure
429 */
430 static void cmd_in_timeout(unsigned long data)
431 {
432 struct cardstate *cs = (struct cardstate *) data;
433 struct bas_cardstate *ucs = cs->hw.bas;
434 int rc;
435
436 if (!ucs->rcvbuf_size) {
437 gig_dbg(DEBUG_USBREQ, "%s: no receive in progress", __func__);
438 return;
439 }
440
441 if (ucs->retry_cmd_in++ >= BAS_RETRY) {
442 dev_err(cs->dev,
443 "control read: timeout, giving up after %d tries\n",
444 ucs->retry_cmd_in);
445 kfree(ucs->rcvbuf);
446 ucs->rcvbuf = NULL;
447 ucs->rcvbuf_size = 0;
448 error_reset(cs);
449 return;
450 }
451
452 gig_dbg(DEBUG_USBREQ, "%s: timeout, retry %d",
453 __func__, ucs->retry_cmd_in);
454 rc = atread_submit(cs, BAS_TIMEOUT);
455 if (rc < 0) {
456 kfree(ucs->rcvbuf);
457 ucs->rcvbuf = NULL;
458 ucs->rcvbuf_size = 0;
459 if (rc != -ENODEV)
460 error_reset(cs);
461 }
462 }
463
464 /* read_ctrl_callback
465 * USB completion handler for control pipe input
466 * called by the USB subsystem in interrupt context
467 * parameter:
468 * urb USB request block
469 * urb->context = inbuf structure for controller state
470 */
471 static void read_ctrl_callback(struct urb *urb)
472 {
473 struct inbuf_t *inbuf = urb->context;
474 struct cardstate *cs = inbuf->cs;
475 struct bas_cardstate *ucs = cs->hw.bas;
476 int status = urb->status;
477 unsigned numbytes;
478 int rc;
479
480 update_basstate(ucs, 0, BS_ATRDPEND);
481 wake_up(&ucs->waitqueue);
482 del_timer(&ucs->timer_cmd_in);
483
484 switch (status) {
485 case 0: /* normal completion */
486 numbytes = urb->actual_length;
487 if (unlikely(numbytes != ucs->rcvbuf_size)) {
488 dev_warn(cs->dev,
489 "control read: received %d chars, expected %d\n",
490 numbytes, ucs->rcvbuf_size);
491 if (numbytes > ucs->rcvbuf_size)
492 numbytes = ucs->rcvbuf_size;
493 }
494
495 /* copy received bytes to inbuf, notify event layer */
496 if (gigaset_fill_inbuf(inbuf, ucs->rcvbuf, numbytes)) {
497 gig_dbg(DEBUG_INTR, "%s-->BH", __func__);
498 gigaset_schedule_event(cs);
499 }
500 break;
501
502 case -ENOENT: /* cancelled */
503 case -ECONNRESET: /* cancelled (async) */
504 case -EINPROGRESS: /* pending */
505 case -ENODEV: /* device removed */
506 case -ESHUTDOWN: /* device shut down */
507 /* no further action necessary */
508 gig_dbg(DEBUG_USBREQ, "%s: %s",
509 __func__, get_usb_statmsg(status));
510 break;
511
512 default: /* other errors: retry */
513 if (ucs->retry_cmd_in++ < BAS_RETRY) {
514 gig_dbg(DEBUG_USBREQ, "%s: %s, retry %d", __func__,
515 get_usb_statmsg(status), ucs->retry_cmd_in);
516 rc = atread_submit(cs, BAS_TIMEOUT);
517 if (rc >= 0)
518 /* successfully resubmitted, skip freeing */
519 return;
520 if (rc == -ENODEV)
521 /* disconnect, no further action necessary */
522 break;
523 }
524 dev_err(cs->dev, "control read: %s, giving up after %d tries\n",
525 get_usb_statmsg(status), ucs->retry_cmd_in);
526 error_reset(cs);
527 }
528
529 /* read finished, free buffer */
530 kfree(ucs->rcvbuf);
531 ucs->rcvbuf = NULL;
532 ucs->rcvbuf_size = 0;
533 }
534
535 /* atread_submit
536 * submit an HD_READ_ATMESSAGE command URB and optionally start a timeout
537 * parameters:
538 * cs controller state structure
539 * timeout timeout in 1/10 sec., 0: none
540 * return value:
541 * 0 on success
542 * -EBUSY if another request is pending
543 * any URB submission error code
544 */
545 static int atread_submit(struct cardstate *cs, int timeout)
546 {
547 struct bas_cardstate *ucs = cs->hw.bas;
548 int basstate;
549 int ret;
550
551 gig_dbg(DEBUG_USBREQ, "-------> HD_READ_ATMESSAGE (%d)",
552 ucs->rcvbuf_size);
553
554 basstate = update_basstate(ucs, BS_ATRDPEND, 0);
555 if (basstate & BS_ATRDPEND) {
556 dev_err(cs->dev,
557 "could not submit HD_READ_ATMESSAGE: URB busy\n");
558 return -EBUSY;
559 }
560
561 if (basstate & BS_SUSPEND) {
562 dev_notice(cs->dev,
563 "HD_READ_ATMESSAGE not submitted, "
564 "suspend in progress\n");
565 update_basstate(ucs, 0, BS_ATRDPEND);
566 /* treat like disconnect */
567 return -ENODEV;
568 }
569
570 ucs->dr_cmd_in.bRequestType = IN_VENDOR_REQ;
571 ucs->dr_cmd_in.bRequest = HD_READ_ATMESSAGE;
572 ucs->dr_cmd_in.wValue = 0;
573 ucs->dr_cmd_in.wIndex = 0;
574 ucs->dr_cmd_in.wLength = cpu_to_le16(ucs->rcvbuf_size);
575 usb_fill_control_urb(ucs->urb_cmd_in, ucs->udev,
576 usb_rcvctrlpipe(ucs->udev, 0),
577 (unsigned char *) &ucs->dr_cmd_in,
578 ucs->rcvbuf, ucs->rcvbuf_size,
579 read_ctrl_callback, cs->inbuf);
580
581 ret = usb_submit_urb(ucs->urb_cmd_in, GFP_ATOMIC);
582 if (ret != 0) {
583 update_basstate(ucs, 0, BS_ATRDPEND);
584 dev_err(cs->dev, "could not submit HD_READ_ATMESSAGE: %s\n",
585 get_usb_rcmsg(ret));
586 return ret;
587 }
588
589 if (timeout > 0) {
590 gig_dbg(DEBUG_USBREQ, "setting timeout of %d/10 secs", timeout);
591 ucs->timer_cmd_in.expires = jiffies + timeout * HZ / 10;
592 ucs->timer_cmd_in.data = (unsigned long) cs;
593 ucs->timer_cmd_in.function = cmd_in_timeout;
594 add_timer(&ucs->timer_cmd_in);
595 }
596 return 0;
597 }
598
599 /* read_int_callback
600 * USB completion handler for interrupt pipe input
601 * called by the USB subsystem in interrupt context
602 * parameter:
603 * urb USB request block
604 * urb->context = controller state structure
605 */
606 static void read_int_callback(struct urb *urb)
607 {
608 struct cardstate *cs = urb->context;
609 struct bas_cardstate *ucs = cs->hw.bas;
610 struct bc_state *bcs;
611 int status = urb->status;
612 unsigned long flags;
613 int rc;
614 unsigned l;
615 int channel;
616
617 switch (status) {
618 case 0: /* success */
619 break;
620 case -ENOENT: /* cancelled */
621 case -ECONNRESET: /* cancelled (async) */
622 case -EINPROGRESS: /* pending */
623 /* ignore silently */
624 gig_dbg(DEBUG_USBREQ, "%s: %s",
625 __func__, get_usb_statmsg(status));
626 return;
627 case -ENODEV: /* device removed */
628 case -ESHUTDOWN: /* device shut down */
629 gig_dbg(DEBUG_USBREQ, "%s: device disconnected", __func__);
630 return;
631 default: /* severe trouble */
632 dev_warn(cs->dev, "interrupt read: %s\n",
633 get_usb_statmsg(status));
634 goto resubmit;
635 }
636
637 /* drop incomplete packets even if the missing bytes wouldn't matter */
638 if (unlikely(urb->actual_length < IP_MSGSIZE)) {
639 dev_warn(cs->dev, "incomplete interrupt packet (%d bytes)\n",
640 urb->actual_length);
641 goto resubmit;
642 }
643
644 l = (unsigned) ucs->int_in_buf[1] +
645 (((unsigned) ucs->int_in_buf[2]) << 8);
646
647 gig_dbg(DEBUG_USBREQ, "<-------%d: 0x%02x (%u [0x%02x 0x%02x])",
648 urb->actual_length, (int)ucs->int_in_buf[0], l,
649 (int)ucs->int_in_buf[1], (int)ucs->int_in_buf[2]);
650
651 channel = 0;
652
653 switch (ucs->int_in_buf[0]) {
654 case HD_DEVICE_INIT_OK:
655 update_basstate(ucs, BS_INIT, 0);
656 break;
657
658 case HD_READY_SEND_ATDATA:
659 del_timer(&ucs->timer_atrdy);
660 update_basstate(ucs, BS_ATREADY, BS_ATTIMER);
661 start_cbsend(cs);
662 break;
663
664 case HD_OPEN_B2CHANNEL_ACK:
665 ++channel;
666 case HD_OPEN_B1CHANNEL_ACK:
667 bcs = cs->bcs + channel;
668 update_basstate(ucs, BS_B1OPEN << channel, 0);
669 gigaset_bchannel_up(bcs);
670 break;
671
672 case HD_OPEN_ATCHANNEL_ACK:
673 update_basstate(ucs, BS_ATOPEN, 0);
674 start_cbsend(cs);
675 break;
676
677 case HD_CLOSE_B2CHANNEL_ACK:
678 ++channel;
679 case HD_CLOSE_B1CHANNEL_ACK:
680 bcs = cs->bcs + channel;
681 update_basstate(ucs, 0, BS_B1OPEN << channel);
682 stopurbs(bcs->hw.bas);
683 gigaset_bchannel_down(bcs);
684 break;
685
686 case HD_CLOSE_ATCHANNEL_ACK:
687 update_basstate(ucs, 0, BS_ATOPEN);
688 break;
689
690 case HD_B2_FLOW_CONTROL:
691 ++channel;
692 case HD_B1_FLOW_CONTROL:
693 bcs = cs->bcs + channel;
694 atomic_add((l - BAS_NORMFRAME) * BAS_CORRFRAMES,
695 &bcs->hw.bas->corrbytes);
696 gig_dbg(DEBUG_ISO,
697 "Flow control (channel %d, sub %d): 0x%02x => %d",
698 channel, bcs->hw.bas->numsub, l,
699 atomic_read(&bcs->hw.bas->corrbytes));
700 break;
701
702 case HD_RECEIVEATDATA_ACK: /* AT response ready to be received */
703 if (!l) {
704 dev_warn(cs->dev,
705 "HD_RECEIVEATDATA_ACK with length 0 ignored\n");
706 break;
707 }
708 spin_lock_irqsave(&cs->lock, flags);
709 if (ucs->rcvbuf_size) {
710 /* throw away previous buffer - we have no queue */
711 dev_err(cs->dev,
712 "receive AT data overrun, %d bytes lost\n",
713 ucs->rcvbuf_size);
714 kfree(ucs->rcvbuf);
715 ucs->rcvbuf_size = 0;
716 }
717 ucs->rcvbuf = kmalloc(l, GFP_ATOMIC);
718 if (ucs->rcvbuf == NULL) {
719 spin_unlock_irqrestore(&cs->lock, flags);
720 dev_err(cs->dev, "out of memory receiving AT data\n");
721 error_reset(cs);
722 break;
723 }
724 ucs->rcvbuf_size = l;
725 ucs->retry_cmd_in = 0;
726 rc = atread_submit(cs, BAS_TIMEOUT);
727 if (rc < 0) {
728 kfree(ucs->rcvbuf);
729 ucs->rcvbuf = NULL;
730 ucs->rcvbuf_size = 0;
731 if (rc != -ENODEV) {
732 spin_unlock_irqrestore(&cs->lock, flags);
733 error_reset(cs);
734 break;
735 }
736 }
737 spin_unlock_irqrestore(&cs->lock, flags);
738 break;
739
740 case HD_RESET_INTERRUPT_PIPE_ACK:
741 update_basstate(ucs, 0, BS_RESETTING);
742 dev_notice(cs->dev, "interrupt pipe reset\n");
743 break;
744
745 case HD_SUSPEND_END:
746 gig_dbg(DEBUG_USBREQ, "HD_SUSPEND_END");
747 break;
748
749 default:
750 dev_warn(cs->dev,
751 "unknown Gigaset signal 0x%02x (%u) ignored\n",
752 (int) ucs->int_in_buf[0], l);
753 }
754
755 check_pending(ucs);
756 wake_up(&ucs->waitqueue);
757
758 resubmit:
759 rc = usb_submit_urb(urb, GFP_ATOMIC);
760 if (unlikely(rc != 0 && rc != -ENODEV)) {
761 dev_err(cs->dev, "could not resubmit interrupt URB: %s\n",
762 get_usb_rcmsg(rc));
763 error_reset(cs);
764 }
765 }
766
767 /* read_iso_callback
768 * USB completion handler for B channel isochronous input
769 * called by the USB subsystem in interrupt context
770 * parameter:
771 * urb USB request block of completed request
772 * urb->context = bc_state structure
773 */
774 static void read_iso_callback(struct urb *urb)
775 {
776 struct bc_state *bcs;
777 struct bas_bc_state *ubc;
778 int status = urb->status;
779 unsigned long flags;
780 int i, rc;
781
782 /* status codes not worth bothering the tasklet with */
783 if (unlikely(status == -ENOENT ||
784 status == -ECONNRESET ||
785 status == -EINPROGRESS ||
786 status == -ENODEV ||
787 status == -ESHUTDOWN)) {
788 gig_dbg(DEBUG_ISO, "%s: %s",
789 __func__, get_usb_statmsg(status));
790 return;
791 }
792
793 bcs = urb->context;
794 ubc = bcs->hw.bas;
795
796 spin_lock_irqsave(&ubc->isoinlock, flags);
797 if (likely(ubc->isoindone == NULL)) {
798 /* pass URB to tasklet */
799 ubc->isoindone = urb;
800 ubc->isoinstatus = status;
801 tasklet_hi_schedule(&ubc->rcvd_tasklet);
802 } else {
803 /* tasklet still busy, drop data and resubmit URB */
804 ubc->loststatus = status;
805 for (i = 0; i < BAS_NUMFRAMES; i++) {
806 ubc->isoinlost += urb->iso_frame_desc[i].actual_length;
807 if (unlikely(urb->iso_frame_desc[i].status != 0 &&
808 urb->iso_frame_desc[i].status !=
809 -EINPROGRESS))
810 ubc->loststatus = urb->iso_frame_desc[i].status;
811 urb->iso_frame_desc[i].status = 0;
812 urb->iso_frame_desc[i].actual_length = 0;
813 }
814 if (likely(ubc->running)) {
815 /* urb->dev is clobbered by USB subsystem */
816 urb->dev = bcs->cs->hw.bas->udev;
817 urb->transfer_flags = URB_ISO_ASAP;
818 urb->number_of_packets = BAS_NUMFRAMES;
819 gig_dbg(DEBUG_ISO, "%s: isoc read overrun/resubmit",
820 __func__);
821 rc = usb_submit_urb(urb, GFP_ATOMIC);
822 if (unlikely(rc != 0 && rc != -ENODEV)) {
823 dev_err(bcs->cs->dev,
824 "could not resubmit isochronous read "
825 "URB: %s\n", get_usb_rcmsg(rc));
826 dump_urb(DEBUG_ISO, "isoc read", urb);
827 error_hangup(bcs);
828 }
829 }
830 }
831 spin_unlock_irqrestore(&ubc->isoinlock, flags);
832 }
833
834 /* write_iso_callback
835 * USB completion handler for B channel isochronous output
836 * called by the USB subsystem in interrupt context
837 * parameter:
838 * urb USB request block of completed request
839 * urb->context = isow_urbctx_t structure
840 */
841 static void write_iso_callback(struct urb *urb)
842 {
843 struct isow_urbctx_t *ucx;
844 struct bas_bc_state *ubc;
845 int status = urb->status;
846 unsigned long flags;
847
848 /* status codes not worth bothering the tasklet with */
849 if (unlikely(status == -ENOENT ||
850 status == -ECONNRESET ||
851 status == -EINPROGRESS ||
852 status == -ENODEV ||
853 status == -ESHUTDOWN)) {
854 gig_dbg(DEBUG_ISO, "%s: %s",
855 __func__, get_usb_statmsg(status));
856 return;
857 }
858
859 /* pass URB context to tasklet */
860 ucx = urb->context;
861 ubc = ucx->bcs->hw.bas;
862 ucx->status = status;
863
864 spin_lock_irqsave(&ubc->isooutlock, flags);
865 ubc->isooutovfl = ubc->isooutdone;
866 ubc->isooutdone = ucx;
867 spin_unlock_irqrestore(&ubc->isooutlock, flags);
868 tasklet_hi_schedule(&ubc->sent_tasklet);
869 }
870
871 /* starturbs
872 * prepare and submit USB request blocks for isochronous input and output
873 * argument:
874 * B channel control structure
875 * return value:
876 * 0 on success
877 * < 0 on error (no URBs submitted)
878 */
879 static int starturbs(struct bc_state *bcs)
880 {
881 struct bas_bc_state *ubc = bcs->hw.bas;
882 struct urb *urb;
883 int j, k;
884 int rc;
885
886 /* initialize L2 reception */
887 if (bcs->proto2 == L2_HDLC)
888 bcs->inputstate |= INS_flag_hunt;
889
890 /* submit all isochronous input URBs */
891 ubc->running = 1;
892 for (k = 0; k < BAS_INURBS; k++) {
893 urb = ubc->isoinurbs[k];
894 if (!urb) {
895 rc = -EFAULT;
896 goto error;
897 }
898
899 urb->dev = bcs->cs->hw.bas->udev;
900 urb->pipe = usb_rcvisocpipe(urb->dev, 3 + 2 * bcs->channel);
901 urb->transfer_flags = URB_ISO_ASAP;
902 urb->transfer_buffer = ubc->isoinbuf + k * BAS_INBUFSIZE;
903 urb->transfer_buffer_length = BAS_INBUFSIZE;
904 urb->number_of_packets = BAS_NUMFRAMES;
905 urb->interval = BAS_FRAMETIME;
906 urb->complete = read_iso_callback;
907 urb->context = bcs;
908 for (j = 0; j < BAS_NUMFRAMES; j++) {
909 urb->iso_frame_desc[j].offset = j * BAS_MAXFRAME;
910 urb->iso_frame_desc[j].length = BAS_MAXFRAME;
911 urb->iso_frame_desc[j].status = 0;
912 urb->iso_frame_desc[j].actual_length = 0;
913 }
914
915 dump_urb(DEBUG_ISO, "Initial isoc read", urb);
916 rc = usb_submit_urb(urb, GFP_ATOMIC);
917 if (rc != 0)
918 goto error;
919 }
920
921 /* initialize L2 transmission */
922 gigaset_isowbuf_init(ubc->isooutbuf, PPP_FLAG);
923
924 /* set up isochronous output URBs for flag idling */
925 for (k = 0; k < BAS_OUTURBS; ++k) {
926 urb = ubc->isoouturbs[k].urb;
927 if (!urb) {
928 rc = -EFAULT;
929 goto error;
930 }
931 urb->dev = bcs->cs->hw.bas->udev;
932 urb->pipe = usb_sndisocpipe(urb->dev, 4 + 2 * bcs->channel);
933 urb->transfer_flags = URB_ISO_ASAP;
934 urb->transfer_buffer = ubc->isooutbuf->data;
935 urb->transfer_buffer_length = sizeof(ubc->isooutbuf->data);
936 urb->number_of_packets = BAS_NUMFRAMES;
937 urb->interval = BAS_FRAMETIME;
938 urb->complete = write_iso_callback;
939 urb->context = &ubc->isoouturbs[k];
940 for (j = 0; j < BAS_NUMFRAMES; ++j) {
941 urb->iso_frame_desc[j].offset = BAS_OUTBUFSIZE;
942 urb->iso_frame_desc[j].length = BAS_NORMFRAME;
943 urb->iso_frame_desc[j].status = 0;
944 urb->iso_frame_desc[j].actual_length = 0;
945 }
946 ubc->isoouturbs[k].limit = -1;
947 }
948
949 /* keep one URB free, submit the others */
950 for (k = 0; k < BAS_OUTURBS-1; ++k) {
951 dump_urb(DEBUG_ISO, "Initial isoc write", urb);
952 rc = usb_submit_urb(ubc->isoouturbs[k].urb, GFP_ATOMIC);
953 if (rc != 0)
954 goto error;
955 }
956 dump_urb(DEBUG_ISO, "Initial isoc write (free)", urb);
957 ubc->isooutfree = &ubc->isoouturbs[BAS_OUTURBS-1];
958 ubc->isooutdone = ubc->isooutovfl = NULL;
959 return 0;
960 error:
961 stopurbs(ubc);
962 return rc;
963 }
964
965 /* stopurbs
966 * cancel the USB request blocks for isochronous input and output
967 * errors are silently ignored
968 * argument:
969 * B channel control structure
970 */
971 static void stopurbs(struct bas_bc_state *ubc)
972 {
973 int k, rc;
974
975 ubc->running = 0;
976
977 for (k = 0; k < BAS_INURBS; ++k) {
978 rc = usb_unlink_urb(ubc->isoinurbs[k]);
979 gig_dbg(DEBUG_ISO,
980 "%s: isoc input URB %d unlinked, result = %s",
981 __func__, k, get_usb_rcmsg(rc));
982 }
983
984 for (k = 0; k < BAS_OUTURBS; ++k) {
985 rc = usb_unlink_urb(ubc->isoouturbs[k].urb);
986 gig_dbg(DEBUG_ISO,
987 "%s: isoc output URB %d unlinked, result = %s",
988 __func__, k, get_usb_rcmsg(rc));
989 }
990 }
991
992 /* Isochronous Write - Bottom Half */
993 /* =============================== */
994
995 /* submit_iso_write_urb
996 * fill and submit the next isochronous write URB
997 * parameters:
998 * ucx context structure containing URB
999 * return value:
1000 * number of frames submitted in URB
1001 * 0 if URB not submitted because no data available (isooutbuf busy)
1002 * error code < 0 on error
1003 */
1004 static int submit_iso_write_urb(struct isow_urbctx_t *ucx)
1005 {
1006 struct urb *urb = ucx->urb;
1007 struct bas_bc_state *ubc = ucx->bcs->hw.bas;
1008 struct usb_iso_packet_descriptor *ifd;
1009 int corrbytes, nframe, rc;
1010
1011 /* urb->dev is clobbered by USB subsystem */
1012 urb->dev = ucx->bcs->cs->hw.bas->udev;
1013 urb->transfer_flags = URB_ISO_ASAP;
1014 urb->transfer_buffer = ubc->isooutbuf->data;
1015 urb->transfer_buffer_length = sizeof(ubc->isooutbuf->data);
1016
1017 for (nframe = 0; nframe < BAS_NUMFRAMES; nframe++) {
1018 ifd = &urb->iso_frame_desc[nframe];
1019
1020 /* compute frame length according to flow control */
1021 ifd->length = BAS_NORMFRAME;
1022 corrbytes = atomic_read(&ubc->corrbytes);
1023 if (corrbytes != 0) {
1024 gig_dbg(DEBUG_ISO, "%s: corrbytes=%d",
1025 __func__, corrbytes);
1026 if (corrbytes > BAS_HIGHFRAME - BAS_NORMFRAME)
1027 corrbytes = BAS_HIGHFRAME - BAS_NORMFRAME;
1028 else if (corrbytes < BAS_LOWFRAME - BAS_NORMFRAME)
1029 corrbytes = BAS_LOWFRAME - BAS_NORMFRAME;
1030 ifd->length += corrbytes;
1031 atomic_add(-corrbytes, &ubc->corrbytes);
1032 }
1033
1034 /* retrieve block of data to send */
1035 rc = gigaset_isowbuf_getbytes(ubc->isooutbuf, ifd->length);
1036 if (rc < 0) {
1037 if (rc == -EBUSY) {
1038 gig_dbg(DEBUG_ISO,
1039 "%s: buffer busy at frame %d",
1040 __func__, nframe);
1041 /* tasklet will be restarted from
1042 gigaset_isoc_send_skb() */
1043 } else {
1044 dev_err(ucx->bcs->cs->dev,
1045 "%s: buffer error %d at frame %d\n",
1046 __func__, rc, nframe);
1047 return rc;
1048 }
1049 break;
1050 }
1051 ifd->offset = rc;
1052 ucx->limit = ubc->isooutbuf->nextread;
1053 ifd->status = 0;
1054 ifd->actual_length = 0;
1055 }
1056 if (unlikely(nframe == 0))
1057 return 0; /* no data to send */
1058 urb->number_of_packets = nframe;
1059
1060 rc = usb_submit_urb(urb, GFP_ATOMIC);
1061 if (unlikely(rc)) {
1062 if (rc == -ENODEV)
1063 /* device removed - give up silently */
1064 gig_dbg(DEBUG_ISO, "%s: disconnected", __func__);
1065 else
1066 dev_err(ucx->bcs->cs->dev,
1067 "could not submit isochronous write URB: %s\n",
1068 get_usb_rcmsg(rc));
1069 return rc;
1070 }
1071 ++ubc->numsub;
1072 return nframe;
1073 }
1074
1075 /* write_iso_tasklet
1076 * tasklet scheduled when an isochronous output URB from the Gigaset device
1077 * has completed
1078 * parameter:
1079 * data B channel state structure
1080 */
1081 static void write_iso_tasklet(unsigned long data)
1082 {
1083 struct bc_state *bcs = (struct bc_state *) data;
1084 struct bas_bc_state *ubc = bcs->hw.bas;
1085 struct cardstate *cs = bcs->cs;
1086 struct isow_urbctx_t *done, *next, *ovfl;
1087 struct urb *urb;
1088 int status;
1089 struct usb_iso_packet_descriptor *ifd;
1090 int offset;
1091 unsigned long flags;
1092 int i;
1093 struct sk_buff *skb;
1094 int len;
1095 int rc;
1096
1097 /* loop while completed URBs arrive in time */
1098 for (;;) {
1099 if (unlikely(!(ubc->running))) {
1100 gig_dbg(DEBUG_ISO, "%s: not running", __func__);
1101 return;
1102 }
1103
1104 /* retrieve completed URBs */
1105 spin_lock_irqsave(&ubc->isooutlock, flags);
1106 done = ubc->isooutdone;
1107 ubc->isooutdone = NULL;
1108 ovfl = ubc->isooutovfl;
1109 ubc->isooutovfl = NULL;
1110 spin_unlock_irqrestore(&ubc->isooutlock, flags);
1111 if (ovfl) {
1112 dev_err(cs->dev, "isochronous write buffer underrun\n");
1113 error_hangup(bcs);
1114 break;
1115 }
1116 if (!done)
1117 break;
1118
1119 /* submit free URB if available */
1120 spin_lock_irqsave(&ubc->isooutlock, flags);
1121 next = ubc->isooutfree;
1122 ubc->isooutfree = NULL;
1123 spin_unlock_irqrestore(&ubc->isooutlock, flags);
1124 if (next) {
1125 rc = submit_iso_write_urb(next);
1126 if (unlikely(rc <= 0 && rc != -ENODEV)) {
1127 /* could not submit URB, put it back */
1128 spin_lock_irqsave(&ubc->isooutlock, flags);
1129 if (ubc->isooutfree == NULL) {
1130 ubc->isooutfree = next;
1131 next = NULL;
1132 }
1133 spin_unlock_irqrestore(&ubc->isooutlock, flags);
1134 if (next) {
1135 /* couldn't put it back */
1136 dev_err(cs->dev,
1137 "losing isochronous write URB\n");
1138 error_hangup(bcs);
1139 }
1140 }
1141 }
1142
1143 /* process completed URB */
1144 urb = done->urb;
1145 status = done->status;
1146 switch (status) {
1147 case -EXDEV: /* partial completion */
1148 gig_dbg(DEBUG_ISO, "%s: URB partially completed",
1149 __func__);
1150 /* fall through - what's the difference anyway? */
1151 case 0: /* normal completion */
1152 /* inspect individual frames
1153 * assumptions (for lack of documentation):
1154 * - actual_length bytes of first frame in error are
1155 * successfully sent
1156 * - all following frames are not sent at all
1157 */
1158 offset = done->limit; /* default (no error) */
1159 for (i = 0; i < BAS_NUMFRAMES; i++) {
1160 ifd = &urb->iso_frame_desc[i];
1161 if (ifd->status ||
1162 ifd->actual_length != ifd->length) {
1163 dev_warn(cs->dev,
1164 "isochronous write: frame %d: %s, "
1165 "only %d of %d bytes sent\n",
1166 i, get_usb_statmsg(ifd->status),
1167 ifd->actual_length, ifd->length);
1168 offset = (ifd->offset +
1169 ifd->actual_length)
1170 % BAS_OUTBUFSIZE;
1171 break;
1172 }
1173 }
1174 break;
1175 case -EPIPE: /* stall - probably underrun */
1176 dev_err(cs->dev, "isochronous write stalled\n");
1177 error_hangup(bcs);
1178 break;
1179 default: /* severe trouble */
1180 dev_warn(cs->dev, "isochronous write: %s\n",
1181 get_usb_statmsg(status));
1182 }
1183
1184 /* mark the write buffer area covered by this URB as free */
1185 if (done->limit >= 0)
1186 ubc->isooutbuf->read = done->limit;
1187
1188 /* mark URB as free */
1189 spin_lock_irqsave(&ubc->isooutlock, flags);
1190 next = ubc->isooutfree;
1191 ubc->isooutfree = done;
1192 spin_unlock_irqrestore(&ubc->isooutlock, flags);
1193 if (next) {
1194 /* only one URB still active - resubmit one */
1195 rc = submit_iso_write_urb(next);
1196 if (unlikely(rc <= 0 && rc != -ENODEV)) {
1197 /* couldn't submit */
1198 error_hangup(bcs);
1199 }
1200 }
1201 }
1202
1203 /* process queued SKBs */
1204 while ((skb = skb_dequeue(&bcs->squeue))) {
1205 /* copy to output buffer, doing L2 encapsulation */
1206 len = skb->len;
1207 if (gigaset_isoc_buildframe(bcs, skb->data, len) == -EAGAIN) {
1208 /* insufficient buffer space, push back onto queue */
1209 skb_queue_head(&bcs->squeue, skb);
1210 gig_dbg(DEBUG_ISO, "%s: skb requeued, qlen=%d",
1211 __func__, skb_queue_len(&bcs->squeue));
1212 break;
1213 }
1214 skb_pull(skb, len);
1215 gigaset_skb_sent(bcs, skb);
1216 dev_kfree_skb_any(skb);
1217 }
1218 }
1219
1220 /* Isochronous Read - Bottom Half */
1221 /* ============================== */
1222
1223 /* read_iso_tasklet
1224 * tasklet scheduled when an isochronous input URB from the Gigaset device
1225 * has completed
1226 * parameter:
1227 * data B channel state structure
1228 */
1229 static void read_iso_tasklet(unsigned long data)
1230 {
1231 struct bc_state *bcs = (struct bc_state *) data;
1232 struct bas_bc_state *ubc = bcs->hw.bas;
1233 struct cardstate *cs = bcs->cs;
1234 struct urb *urb;
1235 int status;
1236 char *rcvbuf;
1237 unsigned long flags;
1238 int totleft, numbytes, offset, frame, rc;
1239
1240 /* loop while more completed URBs arrive in the meantime */
1241 for (;;) {
1242 /* retrieve URB */
1243 spin_lock_irqsave(&ubc->isoinlock, flags);
1244 urb = ubc->isoindone;
1245 if (!urb) {
1246 spin_unlock_irqrestore(&ubc->isoinlock, flags);
1247 return;
1248 }
1249 status = ubc->isoinstatus;
1250 ubc->isoindone = NULL;
1251 if (unlikely(ubc->loststatus != -EINPROGRESS)) {
1252 dev_warn(cs->dev,
1253 "isochronous read overrun, "
1254 "dropped URB with status: %s, %d bytes lost\n",
1255 get_usb_statmsg(ubc->loststatus),
1256 ubc->isoinlost);
1257 ubc->loststatus = -EINPROGRESS;
1258 }
1259 spin_unlock_irqrestore(&ubc->isoinlock, flags);
1260
1261 if (unlikely(!(ubc->running))) {
1262 gig_dbg(DEBUG_ISO,
1263 "%s: channel not running, "
1264 "dropped URB with status: %s",
1265 __func__, get_usb_statmsg(status));
1266 return;
1267 }
1268
1269 switch (status) {
1270 case 0: /* normal completion */
1271 break;
1272 case -EXDEV: /* inspect individual frames
1273 (we do that anyway) */
1274 gig_dbg(DEBUG_ISO, "%s: URB partially completed",
1275 __func__);
1276 break;
1277 case -ENOENT:
1278 case -ECONNRESET:
1279 case -EINPROGRESS:
1280 gig_dbg(DEBUG_ISO, "%s: %s",
1281 __func__, get_usb_statmsg(status));
1282 continue; /* -> skip */
1283 case -EPIPE:
1284 dev_err(cs->dev, "isochronous read stalled\n");
1285 error_hangup(bcs);
1286 continue; /* -> skip */
1287 default: /* severe trouble */
1288 dev_warn(cs->dev, "isochronous read: %s\n",
1289 get_usb_statmsg(status));
1290 goto error;
1291 }
1292
1293 rcvbuf = urb->transfer_buffer;
1294 totleft = urb->actual_length;
1295 for (frame = 0; totleft > 0 && frame < BAS_NUMFRAMES; frame++) {
1296 numbytes = urb->iso_frame_desc[frame].actual_length;
1297 if (unlikely(urb->iso_frame_desc[frame].status))
1298 dev_warn(cs->dev,
1299 "isochronous read: frame %d[%d]: %s\n",
1300 frame, numbytes,
1301 get_usb_statmsg(
1302 urb->iso_frame_desc[frame].status));
1303 if (unlikely(numbytes > BAS_MAXFRAME))
1304 dev_warn(cs->dev,
1305 "isochronous read: frame %d: "
1306 "numbytes (%d) > BAS_MAXFRAME\n",
1307 frame, numbytes);
1308 if (unlikely(numbytes > totleft)) {
1309 dev_warn(cs->dev,
1310 "isochronous read: frame %d: "
1311 "numbytes (%d) > totleft (%d)\n",
1312 frame, numbytes, totleft);
1313 numbytes = totleft;
1314 }
1315 offset = urb->iso_frame_desc[frame].offset;
1316 if (unlikely(offset + numbytes > BAS_INBUFSIZE)) {
1317 dev_warn(cs->dev,
1318 "isochronous read: frame %d: "
1319 "offset (%d) + numbytes (%d) "
1320 "> BAS_INBUFSIZE\n",
1321 frame, offset, numbytes);
1322 numbytes = BAS_INBUFSIZE - offset;
1323 }
1324 gigaset_isoc_receive(rcvbuf + offset, numbytes, bcs);
1325 totleft -= numbytes;
1326 }
1327 if (unlikely(totleft > 0))
1328 dev_warn(cs->dev,
1329 "isochronous read: %d data bytes missing\n",
1330 totleft);
1331
1332 error:
1333 /* URB processed, resubmit */
1334 for (frame = 0; frame < BAS_NUMFRAMES; frame++) {
1335 urb->iso_frame_desc[frame].status = 0;
1336 urb->iso_frame_desc[frame].actual_length = 0;
1337 }
1338 /* urb->dev is clobbered by USB subsystem */
1339 urb->dev = bcs->cs->hw.bas->udev;
1340 urb->transfer_flags = URB_ISO_ASAP;
1341 urb->number_of_packets = BAS_NUMFRAMES;
1342 rc = usb_submit_urb(urb, GFP_ATOMIC);
1343 if (unlikely(rc != 0 && rc != -ENODEV)) {
1344 dev_err(cs->dev,
1345 "could not resubmit isochronous read URB: %s\n",
1346 get_usb_rcmsg(rc));
1347 dump_urb(DEBUG_ISO, "resubmit iso read", urb);
1348 error_hangup(bcs);
1349 }
1350 }
1351 }
1352
1353 /* Channel Operations */
1354 /* ================== */
1355
1356 /* req_timeout
1357 * timeout routine for control output request
1358 * argument:
1359 * B channel control structure
1360 */
1361 static void req_timeout(unsigned long data)
1362 {
1363 struct bc_state *bcs = (struct bc_state *) data;
1364 struct bas_cardstate *ucs = bcs->cs->hw.bas;
1365 int pending;
1366 unsigned long flags;
1367
1368 check_pending(ucs);
1369
1370 spin_lock_irqsave(&ucs->lock, flags);
1371 pending = ucs->pending;
1372 ucs->pending = 0;
1373 spin_unlock_irqrestore(&ucs->lock, flags);
1374
1375 switch (pending) {
1376 case 0: /* no pending request */
1377 gig_dbg(DEBUG_USBREQ, "%s: no request pending", __func__);
1378 break;
1379
1380 case HD_OPEN_ATCHANNEL:
1381 dev_err(bcs->cs->dev, "timeout opening AT channel\n");
1382 error_reset(bcs->cs);
1383 break;
1384
1385 case HD_OPEN_B2CHANNEL:
1386 case HD_OPEN_B1CHANNEL:
1387 dev_err(bcs->cs->dev, "timeout opening channel %d\n",
1388 bcs->channel + 1);
1389 error_hangup(bcs);
1390 break;
1391
1392 case HD_CLOSE_ATCHANNEL:
1393 dev_err(bcs->cs->dev, "timeout closing AT channel\n");
1394 error_reset(bcs->cs);
1395 break;
1396
1397 case HD_CLOSE_B2CHANNEL:
1398 case HD_CLOSE_B1CHANNEL:
1399 dev_err(bcs->cs->dev, "timeout closing channel %d\n",
1400 bcs->channel + 1);
1401 error_reset(bcs->cs);
1402 break;
1403
1404 case HD_RESET_INTERRUPT_PIPE:
1405 /* error recovery escalation */
1406 dev_err(bcs->cs->dev,
1407 "reset interrupt pipe timeout, attempting USB reset\n");
1408 usb_queue_reset_device(bcs->cs->hw.bas->interface);
1409 break;
1410
1411 default:
1412 dev_warn(bcs->cs->dev, "request 0x%02x timed out, clearing\n",
1413 pending);
1414 }
1415
1416 wake_up(&ucs->waitqueue);
1417 }
1418
1419 /* write_ctrl_callback
1420 * USB completion handler for control pipe output
1421 * called by the USB subsystem in interrupt context
1422 * parameter:
1423 * urb USB request block of completed request
1424 * urb->context = hardware specific controller state structure
1425 */
1426 static void write_ctrl_callback(struct urb *urb)
1427 {
1428 struct bas_cardstate *ucs = urb->context;
1429 int status = urb->status;
1430 int rc;
1431 unsigned long flags;
1432
1433 /* check status */
1434 switch (status) {
1435 case 0: /* normal completion */
1436 spin_lock_irqsave(&ucs->lock, flags);
1437 switch (ucs->pending) {
1438 case HD_DEVICE_INIT_ACK: /* no reply expected */
1439 del_timer(&ucs->timer_ctrl);
1440 ucs->pending = 0;
1441 break;
1442 }
1443 spin_unlock_irqrestore(&ucs->lock, flags);
1444 return;
1445
1446 case -ENOENT: /* cancelled */
1447 case -ECONNRESET: /* cancelled (async) */
1448 case -EINPROGRESS: /* pending */
1449 case -ENODEV: /* device removed */
1450 case -ESHUTDOWN: /* device shut down */
1451 /* ignore silently */
1452 gig_dbg(DEBUG_USBREQ, "%s: %s",
1453 __func__, get_usb_statmsg(status));
1454 break;
1455
1456 default: /* any failure */
1457 /* don't retry if suspend requested */
1458 if (++ucs->retry_ctrl > BAS_RETRY ||
1459 (ucs->basstate & BS_SUSPEND)) {
1460 dev_err(&ucs->interface->dev,
1461 "control request 0x%02x failed: %s\n",
1462 ucs->dr_ctrl.bRequest,
1463 get_usb_statmsg(status));
1464 break; /* give up */
1465 }
1466 dev_notice(&ucs->interface->dev,
1467 "control request 0x%02x: %s, retry %d\n",
1468 ucs->dr_ctrl.bRequest, get_usb_statmsg(status),
1469 ucs->retry_ctrl);
1470 /* urb->dev is clobbered by USB subsystem */
1471 urb->dev = ucs->udev;
1472 rc = usb_submit_urb(urb, GFP_ATOMIC);
1473 if (unlikely(rc)) {
1474 dev_err(&ucs->interface->dev,
1475 "could not resubmit request 0x%02x: %s\n",
1476 ucs->dr_ctrl.bRequest, get_usb_rcmsg(rc));
1477 break;
1478 }
1479 /* resubmitted */
1480 return;
1481 }
1482
1483 /* failed, clear pending request */
1484 spin_lock_irqsave(&ucs->lock, flags);
1485 del_timer(&ucs->timer_ctrl);
1486 ucs->pending = 0;
1487 spin_unlock_irqrestore(&ucs->lock, flags);
1488 wake_up(&ucs->waitqueue);
1489 }
1490
1491 /* req_submit
1492 * submit a control output request without message buffer to the Gigaset base
1493 * and optionally start a timeout
1494 * parameters:
1495 * bcs B channel control structure
1496 * req control request code (HD_*)
1497 * val control request parameter value (set to 0 if unused)
1498 * timeout timeout in seconds (0: no timeout)
1499 * return value:
1500 * 0 on success
1501 * -EBUSY if another request is pending
1502 * any URB submission error code
1503 */
1504 static int req_submit(struct bc_state *bcs, int req, int val, int timeout)
1505 {
1506 struct bas_cardstate *ucs = bcs->cs->hw.bas;
1507 int ret;
1508 unsigned long flags;
1509
1510 gig_dbg(DEBUG_USBREQ, "-------> 0x%02x (%d)", req, val);
1511
1512 spin_lock_irqsave(&ucs->lock, flags);
1513 if (ucs->pending) {
1514 spin_unlock_irqrestore(&ucs->lock, flags);
1515 dev_err(bcs->cs->dev,
1516 "submission of request 0x%02x failed: "
1517 "request 0x%02x still pending\n",
1518 req, ucs->pending);
1519 return -EBUSY;
1520 }
1521
1522 ucs->dr_ctrl.bRequestType = OUT_VENDOR_REQ;
1523 ucs->dr_ctrl.bRequest = req;
1524 ucs->dr_ctrl.wValue = cpu_to_le16(val);
1525 ucs->dr_ctrl.wIndex = 0;
1526 ucs->dr_ctrl.wLength = 0;
1527 usb_fill_control_urb(ucs->urb_ctrl, ucs->udev,
1528 usb_sndctrlpipe(ucs->udev, 0),
1529 (unsigned char *) &ucs->dr_ctrl, NULL, 0,
1530 write_ctrl_callback, ucs);
1531 ucs->retry_ctrl = 0;
1532 ret = usb_submit_urb(ucs->urb_ctrl, GFP_ATOMIC);
1533 if (unlikely(ret)) {
1534 dev_err(bcs->cs->dev, "could not submit request 0x%02x: %s\n",
1535 req, get_usb_rcmsg(ret));
1536 spin_unlock_irqrestore(&ucs->lock, flags);
1537 return ret;
1538 }
1539 ucs->pending = req;
1540
1541 if (timeout > 0) {
1542 gig_dbg(DEBUG_USBREQ, "setting timeout of %d/10 secs", timeout);
1543 ucs->timer_ctrl.expires = jiffies + timeout * HZ / 10;
1544 ucs->timer_ctrl.data = (unsigned long) bcs;
1545 ucs->timer_ctrl.function = req_timeout;
1546 add_timer(&ucs->timer_ctrl);
1547 }
1548
1549 spin_unlock_irqrestore(&ucs->lock, flags);
1550 return 0;
1551 }
1552
1553 /* gigaset_init_bchannel
1554 * called by common.c to connect a B channel
1555 * initialize isochronous I/O and tell the Gigaset base to open the channel
1556 * argument:
1557 * B channel control structure
1558 * return value:
1559 * 0 on success, error code < 0 on error
1560 */
1561 static int gigaset_init_bchannel(struct bc_state *bcs)
1562 {
1563 struct cardstate *cs = bcs->cs;
1564 int req, ret;
1565 unsigned long flags;
1566
1567 spin_lock_irqsave(&cs->lock, flags);
1568 if (unlikely(!cs->connected)) {
1569 gig_dbg(DEBUG_USBREQ, "%s: not connected", __func__);
1570 spin_unlock_irqrestore(&cs->lock, flags);
1571 return -ENODEV;
1572 }
1573
1574 if (cs->hw.bas->basstate & BS_SUSPEND) {
1575 dev_notice(cs->dev,
1576 "not starting isochronous I/O, "
1577 "suspend in progress\n");
1578 spin_unlock_irqrestore(&cs->lock, flags);
1579 return -EHOSTUNREACH;
1580 }
1581
1582 ret = starturbs(bcs);
1583 if (ret < 0) {
1584 spin_unlock_irqrestore(&cs->lock, flags);
1585 dev_err(cs->dev,
1586 "could not start isochronous I/O for channel B%d: %s\n",
1587 bcs->channel + 1,
1588 ret == -EFAULT ? "null URB" : get_usb_rcmsg(ret));
1589 if (ret != -ENODEV)
1590 error_hangup(bcs);
1591 return ret;
1592 }
1593
1594 req = bcs->channel ? HD_OPEN_B2CHANNEL : HD_OPEN_B1CHANNEL;
1595 ret = req_submit(bcs, req, 0, BAS_TIMEOUT);
1596 if (ret < 0) {
1597 dev_err(cs->dev, "could not open channel B%d\n",
1598 bcs->channel + 1);
1599 stopurbs(bcs->hw.bas);
1600 }
1601
1602 spin_unlock_irqrestore(&cs->lock, flags);
1603 if (ret < 0 && ret != -ENODEV)
1604 error_hangup(bcs);
1605 return ret;
1606 }
1607
1608 /* gigaset_close_bchannel
1609 * called by common.c to disconnect a B channel
1610 * tell the Gigaset base to close the channel
1611 * stopping isochronous I/O and LL notification will be done when the
1612 * acknowledgement for the close arrives
1613 * argument:
1614 * B channel control structure
1615 * return value:
1616 * 0 on success, error code < 0 on error
1617 */
1618 static int gigaset_close_bchannel(struct bc_state *bcs)
1619 {
1620 struct cardstate *cs = bcs->cs;
1621 int req, ret;
1622 unsigned long flags;
1623
1624 spin_lock_irqsave(&cs->lock, flags);
1625 if (unlikely(!cs->connected)) {
1626 spin_unlock_irqrestore(&cs->lock, flags);
1627 gig_dbg(DEBUG_USBREQ, "%s: not connected", __func__);
1628 return -ENODEV;
1629 }
1630
1631 if (!(cs->hw.bas->basstate & (bcs->channel ? BS_B2OPEN : BS_B1OPEN))) {
1632 /* channel not running: just signal common.c */
1633 spin_unlock_irqrestore(&cs->lock, flags);
1634 gigaset_bchannel_down(bcs);
1635 return 0;
1636 }
1637
1638 /* channel running: tell device to close it */
1639 req = bcs->channel ? HD_CLOSE_B2CHANNEL : HD_CLOSE_B1CHANNEL;
1640 ret = req_submit(bcs, req, 0, BAS_TIMEOUT);
1641 if (ret < 0)
1642 dev_err(cs->dev, "closing channel B%d failed\n",
1643 bcs->channel + 1);
1644
1645 spin_unlock_irqrestore(&cs->lock, flags);
1646 return ret;
1647 }
1648
1649 /* Device Operations */
1650 /* ================= */
1651
1652 /* complete_cb
1653 * unqueue first command buffer from queue, waking any sleepers
1654 * must be called with cs->cmdlock held
1655 * parameter:
1656 * cs controller state structure
1657 */
1658 static void complete_cb(struct cardstate *cs)
1659 {
1660 struct cmdbuf_t *cb = cs->cmdbuf;
1661
1662 /* unqueue completed buffer */
1663 cs->cmdbytes -= cs->curlen;
1664 gig_dbg(DEBUG_OUTPUT, "write_command: sent %u bytes, %u left",
1665 cs->curlen, cs->cmdbytes);
1666 if (cb->next != NULL) {
1667 cs->cmdbuf = cb->next;
1668 cs->cmdbuf->prev = NULL;
1669 cs->curlen = cs->cmdbuf->len;
1670 } else {
1671 cs->cmdbuf = NULL;
1672 cs->lastcmdbuf = NULL;
1673 cs->curlen = 0;
1674 }
1675
1676 if (cb->wake_tasklet)
1677 tasklet_schedule(cb->wake_tasklet);
1678
1679 kfree(cb);
1680 }
1681
1682 /* write_command_callback
1683 * USB completion handler for AT command transmission
1684 * called by the USB subsystem in interrupt context
1685 * parameter:
1686 * urb USB request block of completed request
1687 * urb->context = controller state structure
1688 */
1689 static void write_command_callback(struct urb *urb)
1690 {
1691 struct cardstate *cs = urb->context;
1692 struct bas_cardstate *ucs = cs->hw.bas;
1693 int status = urb->status;
1694 unsigned long flags;
1695
1696 update_basstate(ucs, 0, BS_ATWRPEND);
1697 wake_up(&ucs->waitqueue);
1698
1699 /* check status */
1700 switch (status) {
1701 case 0: /* normal completion */
1702 break;
1703 case -ENOENT: /* cancelled */
1704 case -ECONNRESET: /* cancelled (async) */
1705 case -EINPROGRESS: /* pending */
1706 case -ENODEV: /* device removed */
1707 case -ESHUTDOWN: /* device shut down */
1708 /* ignore silently */
1709 gig_dbg(DEBUG_USBREQ, "%s: %s",
1710 __func__, get_usb_statmsg(status));
1711 return;
1712 default: /* any failure */
1713 if (++ucs->retry_cmd_out > BAS_RETRY) {
1714 dev_warn(cs->dev,
1715 "command write: %s, "
1716 "giving up after %d retries\n",
1717 get_usb_statmsg(status),
1718 ucs->retry_cmd_out);
1719 break;
1720 }
1721 if (ucs->basstate & BS_SUSPEND) {
1722 dev_warn(cs->dev,
1723 "command write: %s, "
1724 "won't retry - suspend requested\n",
1725 get_usb_statmsg(status));
1726 break;
1727 }
1728 if (cs->cmdbuf == NULL) {
1729 dev_warn(cs->dev,
1730 "command write: %s, "
1731 "cannot retry - cmdbuf gone\n",
1732 get_usb_statmsg(status));
1733 break;
1734 }
1735 dev_notice(cs->dev, "command write: %s, retry %d\n",
1736 get_usb_statmsg(status), ucs->retry_cmd_out);
1737 if (atwrite_submit(cs, cs->cmdbuf->buf, cs->cmdbuf->len) >= 0)
1738 /* resubmitted - bypass regular exit block */
1739 return;
1740 /* command send failed, assume base still waiting */
1741 update_basstate(ucs, BS_ATREADY, 0);
1742 }
1743
1744 spin_lock_irqsave(&cs->cmdlock, flags);
1745 if (cs->cmdbuf != NULL)
1746 complete_cb(cs);
1747 spin_unlock_irqrestore(&cs->cmdlock, flags);
1748 }
1749
1750 /* atrdy_timeout
1751 * timeout routine for AT command transmission
1752 * argument:
1753 * controller state structure
1754 */
1755 static void atrdy_timeout(unsigned long data)
1756 {
1757 struct cardstate *cs = (struct cardstate *) data;
1758 struct bas_cardstate *ucs = cs->hw.bas;
1759
1760 dev_warn(cs->dev, "timeout waiting for HD_READY_SEND_ATDATA\n");
1761
1762 /* fake the missing signal - what else can I do? */
1763 update_basstate(ucs, BS_ATREADY, BS_ATTIMER);
1764 start_cbsend(cs);
1765 }
1766
1767 /* atwrite_submit
1768 * submit an HD_WRITE_ATMESSAGE command URB
1769 * parameters:
1770 * cs controller state structure
1771 * buf buffer containing command to send
1772 * len length of command to send
1773 * return value:
1774 * 0 on success
1775 * -EBUSY if another request is pending
1776 * any URB submission error code
1777 */
1778 static int atwrite_submit(struct cardstate *cs, unsigned char *buf, int len)
1779 {
1780 struct bas_cardstate *ucs = cs->hw.bas;
1781 int rc;
1782
1783 gig_dbg(DEBUG_USBREQ, "-------> HD_WRITE_ATMESSAGE (%d)", len);
1784
1785 if (update_basstate(ucs, BS_ATWRPEND, 0) & BS_ATWRPEND) {
1786 dev_err(cs->dev,
1787 "could not submit HD_WRITE_ATMESSAGE: URB busy\n");
1788 return -EBUSY;
1789 }
1790
1791 ucs->dr_cmd_out.bRequestType = OUT_VENDOR_REQ;
1792 ucs->dr_cmd_out.bRequest = HD_WRITE_ATMESSAGE;
1793 ucs->dr_cmd_out.wValue = 0;
1794 ucs->dr_cmd_out.wIndex = 0;
1795 ucs->dr_cmd_out.wLength = cpu_to_le16(len);
1796 usb_fill_control_urb(ucs->urb_cmd_out, ucs->udev,
1797 usb_sndctrlpipe(ucs->udev, 0),
1798 (unsigned char *) &ucs->dr_cmd_out, buf, len,
1799 write_command_callback, cs);
1800 rc = usb_submit_urb(ucs->urb_cmd_out, GFP_ATOMIC);
1801 if (unlikely(rc)) {
1802 update_basstate(ucs, 0, BS_ATWRPEND);
1803 dev_err(cs->dev, "could not submit HD_WRITE_ATMESSAGE: %s\n",
1804 get_usb_rcmsg(rc));
1805 return rc;
1806 }
1807
1808 /* submitted successfully, start timeout if necessary */
1809 if (!(update_basstate(ucs, BS_ATTIMER, BS_ATREADY) & BS_ATTIMER)) {
1810 gig_dbg(DEBUG_OUTPUT, "setting ATREADY timeout of %d/10 secs",
1811 ATRDY_TIMEOUT);
1812 ucs->timer_atrdy.expires = jiffies + ATRDY_TIMEOUT * HZ / 10;
1813 ucs->timer_atrdy.data = (unsigned long) cs;
1814 ucs->timer_atrdy.function = atrdy_timeout;
1815 add_timer(&ucs->timer_atrdy);
1816 }
1817 return 0;
1818 }
1819
1820 /* start_cbsend
1821 * start transmission of AT command queue if necessary
1822 * parameter:
1823 * cs controller state structure
1824 * return value:
1825 * 0 on success
1826 * error code < 0 on error
1827 */
1828 static int start_cbsend(struct cardstate *cs)
1829 {
1830 struct cmdbuf_t *cb;
1831 struct bas_cardstate *ucs = cs->hw.bas;
1832 unsigned long flags;
1833 int rc;
1834 int retval = 0;
1835
1836 /* check if suspend requested */
1837 if (ucs->basstate & BS_SUSPEND) {
1838 gig_dbg(DEBUG_OUTPUT, "suspending");
1839 return -EHOSTUNREACH;
1840 }
1841
1842 /* check if AT channel is open */
1843 if (!(ucs->basstate & BS_ATOPEN)) {
1844 gig_dbg(DEBUG_OUTPUT, "AT channel not open");
1845 rc = req_submit(cs->bcs, HD_OPEN_ATCHANNEL, 0, BAS_TIMEOUT);
1846 if (rc < 0) {
1847 /* flush command queue */
1848 spin_lock_irqsave(&cs->cmdlock, flags);
1849 while (cs->cmdbuf != NULL)
1850 complete_cb(cs);
1851 spin_unlock_irqrestore(&cs->cmdlock, flags);
1852 }
1853 return rc;
1854 }
1855
1856 /* try to send first command in queue */
1857 spin_lock_irqsave(&cs->cmdlock, flags);
1858
1859 while ((cb = cs->cmdbuf) != NULL && (ucs->basstate & BS_ATREADY)) {
1860 ucs->retry_cmd_out = 0;
1861 rc = atwrite_submit(cs, cb->buf, cb->len);
1862 if (unlikely(rc)) {
1863 retval = rc;
1864 complete_cb(cs);
1865 }
1866 }
1867
1868 spin_unlock_irqrestore(&cs->cmdlock, flags);
1869 return retval;
1870 }
1871
1872 /* gigaset_write_cmd
1873 * This function is called by the device independent part of the driver
1874 * to transmit an AT command string to the Gigaset device.
1875 * It encapsulates the device specific method for transmission over the
1876 * direct USB connection to the base.
1877 * The command string is added to the queue of commands to send, and
1878 * USB transmission is started if necessary.
1879 * parameters:
1880 * cs controller state structure
1881 * cb command buffer structure
1882 * return value:
1883 * number of bytes queued on success
1884 * error code < 0 on error
1885 */
1886 static int gigaset_write_cmd(struct cardstate *cs, struct cmdbuf_t *cb)
1887 {
1888 unsigned long flags;
1889 int rc;
1890
1891 gigaset_dbg_buffer(cs->mstate != MS_LOCKED ?
1892 DEBUG_TRANSCMD : DEBUG_LOCKCMD,
1893 "CMD Transmit", cb->len, cb->buf);
1894
1895 /* translate "+++" escape sequence sent as a single separate command
1896 * into "close AT channel" command for error recovery
1897 * The next command will reopen the AT channel automatically.
1898 */
1899 if (cb->len == 3 && !memcmp(cb->buf, "+++", 3)) {
1900 rc = req_submit(cs->bcs, HD_CLOSE_ATCHANNEL, 0, BAS_TIMEOUT);
1901 if (cb->wake_tasklet)
1902 tasklet_schedule(cb->wake_tasklet);
1903 if (!rc)
1904 rc = cb->len;
1905 kfree(cb);
1906 return rc;
1907 }
1908
1909 spin_lock_irqsave(&cs->cmdlock, flags);
1910 cb->prev = cs->lastcmdbuf;
1911 if (cs->lastcmdbuf)
1912 cs->lastcmdbuf->next = cb;
1913 else {
1914 cs->cmdbuf = cb;
1915 cs->curlen = cb->len;
1916 }
1917 cs->cmdbytes += cb->len;
1918 cs->lastcmdbuf = cb;
1919 spin_unlock_irqrestore(&cs->cmdlock, flags);
1920
1921 spin_lock_irqsave(&cs->lock, flags);
1922 if (unlikely(!cs->connected)) {
1923 spin_unlock_irqrestore(&cs->lock, flags);
1924 gig_dbg(DEBUG_USBREQ, "%s: not connected", __func__);
1925 /* flush command queue */
1926 spin_lock_irqsave(&cs->cmdlock, flags);
1927 while (cs->cmdbuf != NULL)
1928 complete_cb(cs);
1929 spin_unlock_irqrestore(&cs->cmdlock, flags);
1930 return -ENODEV;
1931 }
1932 rc = start_cbsend(cs);
1933 spin_unlock_irqrestore(&cs->lock, flags);
1934 return rc < 0 ? rc : cb->len;
1935 }
1936
1937 /* gigaset_write_room
1938 * tty_driver.write_room interface routine
1939 * return number of characters the driver will accept to be written via
1940 * gigaset_write_cmd
1941 * parameter:
1942 * controller state structure
1943 * return value:
1944 * number of characters
1945 */
1946 static int gigaset_write_room(struct cardstate *cs)
1947 {
1948 return IF_WRITEBUF;
1949 }
1950
1951 /* gigaset_chars_in_buffer
1952 * tty_driver.chars_in_buffer interface routine
1953 * return number of characters waiting to be sent
1954 * parameter:
1955 * controller state structure
1956 * return value:
1957 * number of characters
1958 */
1959 static int gigaset_chars_in_buffer(struct cardstate *cs)
1960 {
1961 return cs->cmdbytes;
1962 }
1963
1964 /* gigaset_brkchars
1965 * implementation of ioctl(GIGASET_BRKCHARS)
1966 * parameter:
1967 * controller state structure
1968 * return value:
1969 * -EINVAL (unimplemented function)
1970 */
1971 static int gigaset_brkchars(struct cardstate *cs, const unsigned char buf[6])
1972 {
1973 return -EINVAL;
1974 }
1975
1976
1977 /* Device Initialization/Shutdown */
1978 /* ============================== */
1979
1980 /* Free hardware dependent part of the B channel structure
1981 * parameter:
1982 * bcs B channel structure
1983 * return value:
1984 * !=0 on success
1985 */
1986 static int gigaset_freebcshw(struct bc_state *bcs)
1987 {
1988 struct bas_bc_state *ubc = bcs->hw.bas;
1989 int i;
1990
1991 if (!ubc)
1992 return 0;
1993
1994 /* kill URBs and tasklets before freeing - better safe than sorry */
1995 ubc->running = 0;
1996 gig_dbg(DEBUG_INIT, "%s: killing iso URBs", __func__);
1997 for (i = 0; i < BAS_OUTURBS; ++i) {
1998 usb_kill_urb(ubc->isoouturbs[i].urb);
1999 usb_free_urb(ubc->isoouturbs[i].urb);
2000 }
2001 for (i = 0; i < BAS_INURBS; ++i) {
2002 usb_kill_urb(ubc->isoinurbs[i]);
2003 usb_free_urb(ubc->isoinurbs[i]);
2004 }
2005 tasklet_kill(&ubc->sent_tasklet);
2006 tasklet_kill(&ubc->rcvd_tasklet);
2007 kfree(ubc->isooutbuf);
2008 kfree(ubc);
2009 bcs->hw.bas = NULL;
2010 return 1;
2011 }
2012
2013 /* Initialize hardware dependent part of the B channel structure
2014 * parameter:
2015 * bcs B channel structure
2016 * return value:
2017 * !=0 on success
2018 */
2019 static int gigaset_initbcshw(struct bc_state *bcs)
2020 {
2021 int i;
2022 struct bas_bc_state *ubc;
2023
2024 bcs->hw.bas = ubc = kmalloc(sizeof(struct bas_bc_state), GFP_KERNEL);
2025 if (!ubc) {
2026 pr_err("out of memory\n");
2027 return 0;
2028 }
2029
2030 ubc->running = 0;
2031 atomic_set(&ubc->corrbytes, 0);
2032 spin_lock_init(&ubc->isooutlock);
2033 for (i = 0; i < BAS_OUTURBS; ++i) {
2034 ubc->isoouturbs[i].urb = NULL;
2035 ubc->isoouturbs[i].bcs = bcs;
2036 }
2037 ubc->isooutdone = ubc->isooutfree = ubc->isooutovfl = NULL;
2038 ubc->numsub = 0;
2039 ubc->isooutbuf = kmalloc(sizeof(struct isowbuf_t), GFP_KERNEL);
2040 if (!ubc->isooutbuf) {
2041 pr_err("out of memory\n");
2042 kfree(ubc);
2043 bcs->hw.bas = NULL;
2044 return 0;
2045 }
2046 tasklet_init(&ubc->sent_tasklet,
2047 write_iso_tasklet, (unsigned long) bcs);
2048
2049 spin_lock_init(&ubc->isoinlock);
2050 for (i = 0; i < BAS_INURBS; ++i)
2051 ubc->isoinurbs[i] = NULL;
2052 ubc->isoindone = NULL;
2053 ubc->loststatus = -EINPROGRESS;
2054 ubc->isoinlost = 0;
2055 ubc->seqlen = 0;
2056 ubc->inbyte = 0;
2057 ubc->inbits = 0;
2058 ubc->goodbytes = 0;
2059 ubc->alignerrs = 0;
2060 ubc->fcserrs = 0;
2061 ubc->frameerrs = 0;
2062 ubc->giants = 0;
2063 ubc->runts = 0;
2064 ubc->aborts = 0;
2065 ubc->shared0s = 0;
2066 ubc->stolen0s = 0;
2067 tasklet_init(&ubc->rcvd_tasklet,
2068 read_iso_tasklet, (unsigned long) bcs);
2069 return 1;
2070 }
2071
2072 static void gigaset_reinitbcshw(struct bc_state *bcs)
2073 {
2074 struct bas_bc_state *ubc = bcs->hw.bas;
2075
2076 bcs->hw.bas->running = 0;
2077 atomic_set(&bcs->hw.bas->corrbytes, 0);
2078 bcs->hw.bas->numsub = 0;
2079 spin_lock_init(&ubc->isooutlock);
2080 spin_lock_init(&ubc->isoinlock);
2081 ubc->loststatus = -EINPROGRESS;
2082 }
2083
2084 static void gigaset_freecshw(struct cardstate *cs)
2085 {
2086 /* timers, URBs and rcvbuf are disposed of in disconnect */
2087 kfree(cs->hw.bas->int_in_buf);
2088 kfree(cs->hw.bas);
2089 cs->hw.bas = NULL;
2090 }
2091
2092 static int gigaset_initcshw(struct cardstate *cs)
2093 {
2094 struct bas_cardstate *ucs;
2095
2096 cs->hw.bas = ucs = kmalloc(sizeof *ucs, GFP_KERNEL);
2097 if (!ucs) {
2098 pr_err("out of memory\n");
2099 return 0;
2100 }
2101 ucs->int_in_buf = kmalloc(IP_MSGSIZE, GFP_KERNEL);
2102 if (!ucs->int_in_buf) {
2103 kfree(ucs);
2104 pr_err("out of memory\n");
2105 return 0;
2106 }
2107
2108 ucs->urb_cmd_in = NULL;
2109 ucs->urb_cmd_out = NULL;
2110 ucs->rcvbuf = NULL;
2111 ucs->rcvbuf_size = 0;
2112
2113 spin_lock_init(&ucs->lock);
2114 ucs->pending = 0;
2115
2116 ucs->basstate = 0;
2117 init_timer(&ucs->timer_ctrl);
2118 init_timer(&ucs->timer_atrdy);
2119 init_timer(&ucs->timer_cmd_in);
2120 init_waitqueue_head(&ucs->waitqueue);
2121
2122 return 1;
2123 }
2124
2125 /* freeurbs
2126 * unlink and deallocate all URBs unconditionally
2127 * caller must make sure that no commands are still in progress
2128 * parameter:
2129 * cs controller state structure
2130 */
2131 static void freeurbs(struct cardstate *cs)
2132 {
2133 struct bas_cardstate *ucs = cs->hw.bas;
2134 struct bas_bc_state *ubc;
2135 int i, j;
2136
2137 gig_dbg(DEBUG_INIT, "%s: killing URBs", __func__);
2138 for (j = 0; j < BAS_CHANNELS; ++j) {
2139 ubc = cs->bcs[j].hw.bas;
2140 for (i = 0; i < BAS_OUTURBS; ++i) {
2141 usb_kill_urb(ubc->isoouturbs[i].urb);
2142 usb_free_urb(ubc->isoouturbs[i].urb);
2143 ubc->isoouturbs[i].urb = NULL;
2144 }
2145 for (i = 0; i < BAS_INURBS; ++i) {
2146 usb_kill_urb(ubc->isoinurbs[i]);
2147 usb_free_urb(ubc->isoinurbs[i]);
2148 ubc->isoinurbs[i] = NULL;
2149 }
2150 }
2151 usb_kill_urb(ucs->urb_int_in);
2152 usb_free_urb(ucs->urb_int_in);
2153 ucs->urb_int_in = NULL;
2154 usb_kill_urb(ucs->urb_cmd_out);
2155 usb_free_urb(ucs->urb_cmd_out);
2156 ucs->urb_cmd_out = NULL;
2157 usb_kill_urb(ucs->urb_cmd_in);
2158 usb_free_urb(ucs->urb_cmd_in);
2159 ucs->urb_cmd_in = NULL;
2160 usb_kill_urb(ucs->urb_ctrl);
2161 usb_free_urb(ucs->urb_ctrl);
2162 ucs->urb_ctrl = NULL;
2163 }
2164
2165 /* gigaset_probe
2166 * This function is called when a new USB device is connected.
2167 * It checks whether the new device is handled by this driver.
2168 */
2169 static int gigaset_probe(struct usb_interface *interface,
2170 const struct usb_device_id *id)
2171 {
2172 struct usb_host_interface *hostif;
2173 struct usb_device *udev = interface_to_usbdev(interface);
2174 struct cardstate *cs = NULL;
2175 struct bas_cardstate *ucs = NULL;
2176 struct bas_bc_state *ubc;
2177 struct usb_endpoint_descriptor *endpoint;
2178 int i, j;
2179 int rc;
2180
2181 gig_dbg(DEBUG_INIT,
2182 "%s: Check if device matches .. (Vendor: 0x%x, Product: 0x%x)",
2183 __func__, le16_to_cpu(udev->descriptor.idVendor),
2184 le16_to_cpu(udev->descriptor.idProduct));
2185
2186 /* set required alternate setting */
2187 hostif = interface->cur_altsetting;
2188 if (hostif->desc.bAlternateSetting != 3) {
2189 gig_dbg(DEBUG_INIT,
2190 "%s: wrong alternate setting %d - trying to switch",
2191 __func__, hostif->desc.bAlternateSetting);
2192 if (usb_set_interface(udev, hostif->desc.bInterfaceNumber, 3)
2193 < 0) {
2194 dev_warn(&udev->dev, "usb_set_interface failed, "
2195 "device %d interface %d altsetting %d\n",
2196 udev->devnum, hostif->desc.bInterfaceNumber,
2197 hostif->desc.bAlternateSetting);
2198 return -ENODEV;
2199 }
2200 hostif = interface->cur_altsetting;
2201 }
2202
2203 /* Reject application specific interfaces
2204 */
2205 if (hostif->desc.bInterfaceClass != 255) {
2206 dev_warn(&udev->dev, "%s: bInterfaceClass == %d\n",
2207 __func__, hostif->desc.bInterfaceClass);
2208 return -ENODEV;
2209 }
2210
2211 dev_info(&udev->dev,
2212 "%s: Device matched (Vendor: 0x%x, Product: 0x%x)\n",
2213 __func__, le16_to_cpu(udev->descriptor.idVendor),
2214 le16_to_cpu(udev->descriptor.idProduct));
2215
2216 /* allocate memory for our device state and intialize it */
2217 cs = gigaset_initcs(driver, BAS_CHANNELS, 0, 0, cidmode,
2218 GIGASET_MODULENAME);
2219 if (!cs)
2220 return -ENODEV;
2221 ucs = cs->hw.bas;
2222
2223 /* save off device structure ptrs for later use */
2224 usb_get_dev(udev);
2225 ucs->udev = udev;
2226 ucs->interface = interface;
2227 cs->dev = &interface->dev;
2228
2229 /* allocate URBs:
2230 * - one for the interrupt pipe
2231 * - three for the different uses of the default control pipe
2232 * - three for each isochronous pipe
2233 */
2234 if (!(ucs->urb_int_in = usb_alloc_urb(0, GFP_KERNEL)) ||
2235 !(ucs->urb_cmd_in = usb_alloc_urb(0, GFP_KERNEL)) ||
2236 !(ucs->urb_cmd_out = usb_alloc_urb(0, GFP_KERNEL)) ||
2237 !(ucs->urb_ctrl = usb_alloc_urb(0, GFP_KERNEL)))
2238 goto allocerr;
2239
2240 for (j = 0; j < BAS_CHANNELS; ++j) {
2241 ubc = cs->bcs[j].hw.bas;
2242 for (i = 0; i < BAS_OUTURBS; ++i)
2243 if (!(ubc->isoouturbs[i].urb =
2244 usb_alloc_urb(BAS_NUMFRAMES, GFP_KERNEL)))
2245 goto allocerr;
2246 for (i = 0; i < BAS_INURBS; ++i)
2247 if (!(ubc->isoinurbs[i] =
2248 usb_alloc_urb(BAS_NUMFRAMES, GFP_KERNEL)))
2249 goto allocerr;
2250 }
2251
2252 ucs->rcvbuf = NULL;
2253 ucs->rcvbuf_size = 0;
2254
2255 /* Fill the interrupt urb and send it to the core */
2256 endpoint = &hostif->endpoint[0].desc;
2257 usb_fill_int_urb(ucs->urb_int_in, udev,
2258 usb_rcvintpipe(udev,
2259 (endpoint->bEndpointAddress) & 0x0f),
2260 ucs->int_in_buf, IP_MSGSIZE, read_int_callback, cs,
2261 endpoint->bInterval);
2262 rc = usb_submit_urb(ucs->urb_int_in, GFP_KERNEL);
2263 if (rc != 0) {
2264 dev_err(cs->dev, "could not submit interrupt URB: %s\n",
2265 get_usb_rcmsg(rc));
2266 goto error;
2267 }
2268
2269 /* tell the device that the driver is ready */
2270 rc = req_submit(cs->bcs, HD_DEVICE_INIT_ACK, 0, 0);
2271 if (rc != 0)
2272 goto error;
2273
2274 /* tell common part that the device is ready */
2275 if (startmode == SM_LOCKED)
2276 cs->mstate = MS_LOCKED;
2277
2278 /* save address of controller structure */
2279 usb_set_intfdata(interface, cs);
2280
2281 if (!gigaset_start(cs))
2282 goto error;
2283
2284 return 0;
2285
2286 allocerr:
2287 dev_err(cs->dev, "could not allocate URBs\n");
2288 error:
2289 freeurbs(cs);
2290 usb_set_intfdata(interface, NULL);
2291 gigaset_freecs(cs);
2292 return -ENODEV;
2293 }
2294
2295 /* gigaset_disconnect
2296 * This function is called when the Gigaset base is unplugged.
2297 */
2298 static void gigaset_disconnect(struct usb_interface *interface)
2299 {
2300 struct cardstate *cs;
2301 struct bas_cardstate *ucs;
2302 int j;
2303
2304 cs = usb_get_intfdata(interface);
2305
2306 ucs = cs->hw.bas;
2307
2308 dev_info(cs->dev, "disconnecting Gigaset base\n");
2309
2310 /* mark base as not ready, all channels disconnected */
2311 ucs->basstate = 0;
2312
2313 /* tell LL all channels are down */
2314 for (j = 0; j < BAS_CHANNELS; ++j)
2315 gigaset_bchannel_down(cs->bcs + j);
2316
2317 /* stop driver (common part) */
2318 gigaset_stop(cs);
2319
2320 /* stop timers and URBs, free ressources */
2321 del_timer_sync(&ucs->timer_ctrl);
2322 del_timer_sync(&ucs->timer_atrdy);
2323 del_timer_sync(&ucs->timer_cmd_in);
2324 freeurbs(cs);
2325 usb_set_intfdata(interface, NULL);
2326 kfree(ucs->rcvbuf);
2327 ucs->rcvbuf = NULL;
2328 ucs->rcvbuf_size = 0;
2329 usb_put_dev(ucs->udev);
2330 ucs->interface = NULL;
2331 ucs->udev = NULL;
2332 cs->dev = NULL;
2333 gigaset_freecs(cs);
2334 }
2335
2336 /* gigaset_suspend
2337 * This function is called before the USB connection is suspended.
2338 */
2339 static int gigaset_suspend(struct usb_interface *intf, pm_message_t message)
2340 {
2341 struct cardstate *cs = usb_get_intfdata(intf);
2342 struct bas_cardstate *ucs = cs->hw.bas;
2343 int rc;
2344
2345 /* set suspend flag; this stops AT command/response traffic */
2346 if (update_basstate(ucs, BS_SUSPEND, 0) & BS_SUSPEND) {
2347 gig_dbg(DEBUG_SUSPEND, "already suspended");
2348 return 0;
2349 }
2350
2351 /* wait a bit for blocking conditions to go away */
2352 rc = wait_event_timeout(ucs->waitqueue,
2353 !(ucs->basstate &
2354 (BS_B1OPEN|BS_B2OPEN|BS_ATRDPEND|BS_ATWRPEND)),
2355 BAS_TIMEOUT*HZ/10);
2356 gig_dbg(DEBUG_SUSPEND, "wait_event_timeout() -> %d", rc);
2357
2358 /* check for conditions preventing suspend */
2359 if (ucs->basstate & (BS_B1OPEN|BS_B2OPEN|BS_ATRDPEND|BS_ATWRPEND)) {
2360 dev_warn(cs->dev, "cannot suspend:\n");
2361 if (ucs->basstate & BS_B1OPEN)
2362 dev_warn(cs->dev, " B channel 1 open\n");
2363 if (ucs->basstate & BS_B2OPEN)
2364 dev_warn(cs->dev, " B channel 2 open\n");
2365 if (ucs->basstate & BS_ATRDPEND)
2366 dev_warn(cs->dev, " receiving AT reply\n");
2367 if (ucs->basstate & BS_ATWRPEND)
2368 dev_warn(cs->dev, " sending AT command\n");
2369 update_basstate(ucs, 0, BS_SUSPEND);
2370 return -EBUSY;
2371 }
2372
2373 /* close AT channel if open */
2374 if (ucs->basstate & BS_ATOPEN) {
2375 gig_dbg(DEBUG_SUSPEND, "closing AT channel");
2376 rc = req_submit(cs->bcs, HD_CLOSE_ATCHANNEL, 0, 0);
2377 if (rc) {
2378 update_basstate(ucs, 0, BS_SUSPEND);
2379 return rc;
2380 }
2381 wait_event_timeout(ucs->waitqueue, !ucs->pending,
2382 BAS_TIMEOUT*HZ/10);
2383 /* in case of timeout, proceed anyway */
2384 }
2385
2386 /* kill all URBs and timers that might still be pending */
2387 usb_kill_urb(ucs->urb_ctrl);
2388 usb_kill_urb(ucs->urb_int_in);
2389 del_timer_sync(&ucs->timer_ctrl);
2390
2391 gig_dbg(DEBUG_SUSPEND, "suspend complete");
2392 return 0;
2393 }
2394
2395 /* gigaset_resume
2396 * This function is called after the USB connection has been resumed.
2397 */
2398 static int gigaset_resume(struct usb_interface *intf)
2399 {
2400 struct cardstate *cs = usb_get_intfdata(intf);
2401 struct bas_cardstate *ucs = cs->hw.bas;
2402 int rc;
2403
2404 /* resubmit interrupt URB for spontaneous messages from base */
2405 rc = usb_submit_urb(ucs->urb_int_in, GFP_KERNEL);
2406 if (rc) {
2407 dev_err(cs->dev, "could not resubmit interrupt URB: %s\n",
2408 get_usb_rcmsg(rc));
2409 return rc;
2410 }
2411
2412 /* clear suspend flag to reallow activity */
2413 update_basstate(ucs, 0, BS_SUSPEND);
2414
2415 gig_dbg(DEBUG_SUSPEND, "resume complete");
2416 return 0;
2417 }
2418
2419 /* gigaset_pre_reset
2420 * This function is called before the USB connection is reset.
2421 */
2422 static int gigaset_pre_reset(struct usb_interface *intf)
2423 {
2424 /* handle just like suspend */
2425 return gigaset_suspend(intf, PMSG_ON);
2426 }
2427
2428 /* gigaset_post_reset
2429 * This function is called after the USB connection has been reset.
2430 */
2431 static int gigaset_post_reset(struct usb_interface *intf)
2432 {
2433
2434 /* resume operations */
2435 return gigaset_resume(intf);
2436 }
2437
2438
2439 static const struct gigaset_ops gigops = {
2440 gigaset_write_cmd,
2441 gigaset_write_room,
2442 gigaset_chars_in_buffer,
2443 gigaset_brkchars,
2444 gigaset_init_bchannel,
2445 gigaset_close_bchannel,
2446 gigaset_initbcshw,
2447 gigaset_freebcshw,
2448 gigaset_reinitbcshw,
2449 gigaset_initcshw,
2450 gigaset_freecshw,
2451 gigaset_set_modem_ctrl,
2452 gigaset_baud_rate,
2453 gigaset_set_line_ctrl,
2454 gigaset_isoc_send_skb,
2455 gigaset_isoc_input,
2456 };
2457
2458 /* bas_gigaset_init
2459 * This function is called after the kernel module is loaded.
2460 */
2461 static int __init bas_gigaset_init(void)
2462 {
2463 int result;
2464
2465 /* allocate memory for our driver state and intialize it */
2466 driver = gigaset_initdriver(GIGASET_MINOR, GIGASET_MINORS,
2467 GIGASET_MODULENAME, GIGASET_DEVNAME,
2468 &gigops, THIS_MODULE);
2469 if (driver == NULL)
2470 goto error;
2471
2472 /* register this driver with the USB subsystem */
2473 result = usb_register(&gigaset_usb_driver);
2474 if (result < 0) {
2475 pr_err("error %d registering USB driver\n", -result);
2476 goto error;
2477 }
2478
2479 pr_info(DRIVER_DESC "\n");
2480 return 0;
2481
2482 error:
2483 if (driver)
2484 gigaset_freedriver(driver);
2485 driver = NULL;
2486 return -1;
2487 }
2488
2489 /* bas_gigaset_exit
2490 * This function is called before the kernel module is unloaded.
2491 */
2492 static void __exit bas_gigaset_exit(void)
2493 {
2494 struct bas_cardstate *ucs;
2495 int i;
2496
2497 gigaset_blockdriver(driver); /* => probe will fail
2498 * => no gigaset_start any more
2499 */
2500
2501 /* stop all connected devices */
2502 for (i = 0; i < driver->minors; i++) {
2503 if (gigaset_shutdown(driver->cs + i) < 0)
2504 continue; /* no device */
2505 /* from now on, no isdn callback should be possible */
2506
2507 /* close all still open channels */
2508 ucs = driver->cs[i].hw.bas;
2509 if (ucs->basstate & BS_B1OPEN) {
2510 gig_dbg(DEBUG_INIT, "closing B1 channel");
2511 usb_control_msg(ucs->udev,
2512 usb_sndctrlpipe(ucs->udev, 0),
2513 HD_CLOSE_B1CHANNEL, OUT_VENDOR_REQ,
2514 0, 0, NULL, 0, BAS_TIMEOUT);
2515 }
2516 if (ucs->basstate & BS_B2OPEN) {
2517 gig_dbg(DEBUG_INIT, "closing B2 channel");
2518 usb_control_msg(ucs->udev,
2519 usb_sndctrlpipe(ucs->udev, 0),
2520 HD_CLOSE_B2CHANNEL, OUT_VENDOR_REQ,
2521 0, 0, NULL, 0, BAS_TIMEOUT);
2522 }
2523 if (ucs->basstate & BS_ATOPEN) {
2524 gig_dbg(DEBUG_INIT, "closing AT channel");
2525 usb_control_msg(ucs->udev,
2526 usb_sndctrlpipe(ucs->udev, 0),
2527 HD_CLOSE_ATCHANNEL, OUT_VENDOR_REQ,
2528 0, 0, NULL, 0, BAS_TIMEOUT);
2529 }
2530 ucs->basstate = 0;
2531 }
2532
2533 /* deregister this driver with the USB subsystem */
2534 usb_deregister(&gigaset_usb_driver);
2535 /* this will call the disconnect-callback */
2536 /* from now on, no disconnect/probe callback should be running */
2537
2538 gigaset_freedriver(driver);
2539 driver = NULL;
2540 }
2541
2542
2543 module_init(bas_gigaset_init);
2544 module_exit(bas_gigaset_exit);
2545
2546 MODULE_AUTHOR(DRIVER_AUTHOR);
2547 MODULE_DESCRIPTION(DRIVER_DESC);
2548 MODULE_LICENSE("GPL");
Tomato firmware and modifications.