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[deliverable/linux.git] / drivers / isdn / gigaset / usb-gigaset.c
1 /*
2 * USB driver for Gigaset 307x directly or using M105 Data.
3 *
4 * Copyright (c) 2001 by Stefan Eilers
5 * and Hansjoerg Lipp <hjlipp@web.de>.
6 *
7 * This driver was derived from the USB skeleton driver by
8 * Greg Kroah-Hartman <greg@kroah.com>
9 *
10 * =====================================================================
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License as
13 * published by the Free Software Foundation; either version 2 of
14 * the License, or (at your option) any later version.
15 * =====================================================================
16 */
17
18 #include "gigaset.h"
19 #include <linux/usb.h>
20 #include <linux/module.h>
21 #include <linux/moduleparam.h>
22
23 /* Version Information */
24 #define DRIVER_AUTHOR "Hansjoerg Lipp <hjlipp@web.de>, Stefan Eilers"
25 #define DRIVER_DESC "USB Driver for Gigaset 307x using M105"
26
27 /* Module parameters */
28
29 static int startmode = SM_ISDN;
30 static int cidmode = 1;
31
32 module_param(startmode, int, S_IRUGO);
33 module_param(cidmode, int, S_IRUGO);
34 MODULE_PARM_DESC(startmode, "start in isdn4linux mode");
35 MODULE_PARM_DESC(cidmode, "Call-ID mode");
36
37 #define GIGASET_MINORS 1
38 #define GIGASET_MINOR 8
39 #define GIGASET_MODULENAME "usb_gigaset"
40 #define GIGASET_DEVNAME "ttyGU"
41
42 /* length limit according to Siemens 3070usb-protokoll.doc ch. 2.1 */
43 #define IF_WRITEBUF 264
44
45 /* Values for the Gigaset M105 Data */
46 #define USB_M105_VENDOR_ID 0x0681
47 #define USB_M105_PRODUCT_ID 0x0009
48
49 /* table of devices that work with this driver */
50 static const struct usb_device_id gigaset_table[] = {
51 { USB_DEVICE(USB_M105_VENDOR_ID, USB_M105_PRODUCT_ID) },
52 { } /* Terminating entry */
53 };
54
55 MODULE_DEVICE_TABLE(usb, gigaset_table);
56
57 /*
58 * Control requests (empty fields: 00)
59 *
60 * RT|RQ|VALUE|INDEX|LEN |DATA
61 * In:
62 * C1 08 01
63 * Get flags (1 byte). Bits: 0=dtr,1=rts,3-7:?
64 * C1 0F ll ll
65 * Get device information/status (llll: 0x200 and 0x40 seen).
66 * Real size: I only saw MIN(llll,0x64).
67 * Contents: seems to be always the same...
68 * offset 0x00: Length of this structure (0x64) (len: 1,2,3 bytes)
69 * offset 0x3c: String (16 bit chars): "MCCI USB Serial V2.0"
70 * rest: ?
71 * Out:
72 * 41 11
73 * Initialize/reset device ?
74 * 41 00 xx 00
75 * ? (xx=00 or 01; 01 on start, 00 on close)
76 * 41 07 vv mm
77 * Set/clear flags vv=value, mm=mask (see RQ 08)
78 * 41 12 xx
79 * Used before the following configuration requests are issued
80 * (with xx=0x0f). I've seen other values<0xf, though.
81 * 41 01 xx xx
82 * Set baud rate. xxxx=ceil(0x384000/rate)=trunc(0x383fff/rate)+1.
83 * 41 03 ps bb
84 * Set byte size and parity. p: 0x20=even,0x10=odd,0x00=no parity
85 * [ 0x30: m, 0x40: s ]
86 * [s: 0: 1 stop bit; 1: 1.5; 2: 2]
87 * bb: bits/byte (seen 7 and 8)
88 * 41 13 -- -- -- -- 10 00 ww 00 00 00 xx 00 00 00 yy 00 00 00 zz 00 00 00
89 * ??
90 * Initialization: 01, 40, 00, 00
91 * Open device: 00 40, 00, 00
92 * yy and zz seem to be equal, either 0x00 or 0x0a
93 * (ww,xx) pairs seen: (00,00), (00,40), (01,40), (09,80), (19,80)
94 * 41 19 -- -- -- -- 06 00 00 00 00 xx 11 13
95 * Used after every "configuration sequence" (RQ 12, RQs 01/03/13).
96 * xx is usually 0x00 but was 0x7e before starting data transfer
97 * in unimodem mode. So, this might be an array of characters that
98 * need special treatment ("commit all bufferd data"?), 11=^Q, 13=^S.
99 *
100 * Unimodem mode: use "modprobe ppp_async flag_time=0" as the device _needs_ two
101 * flags per packet.
102 */
103
104 /* functions called if a device of this driver is connected/disconnected */
105 static int gigaset_probe(struct usb_interface *interface,
106 const struct usb_device_id *id);
107 static void gigaset_disconnect(struct usb_interface *interface);
108
109 /* functions called before/after suspend */
110 static int gigaset_suspend(struct usb_interface *intf, pm_message_t message);
111 static int gigaset_resume(struct usb_interface *intf);
112 static int gigaset_pre_reset(struct usb_interface *intf);
113
114 static struct gigaset_driver *driver;
115
116 /* usb specific object needed to register this driver with the usb subsystem */
117 static struct usb_driver gigaset_usb_driver = {
118 .name = GIGASET_MODULENAME,
119 .probe = gigaset_probe,
120 .disconnect = gigaset_disconnect,
121 .id_table = gigaset_table,
122 .suspend = gigaset_suspend,
123 .resume = gigaset_resume,
124 .reset_resume = gigaset_resume,
125 .pre_reset = gigaset_pre_reset,
126 .post_reset = gigaset_resume,
127 };
128
129 struct usb_cardstate {
130 struct usb_device *udev; /* usb device pointer */
131 struct usb_interface *interface; /* interface for this device */
132 int busy; /* bulk output in progress */
133
134 /* Output buffer */
135 unsigned char *bulk_out_buffer;
136 int bulk_out_size;
137 __u8 bulk_out_endpointAddr;
138 struct urb *bulk_out_urb;
139
140 /* Input buffer */
141 unsigned char *rcvbuf;
142 int rcvbuf_size;
143 struct urb *read_urb;
144 __u8 int_in_endpointAddr;
145
146 char bchars[6]; /* for request 0x19 */
147 };
148
149 static inline unsigned tiocm_to_gigaset(unsigned state)
150 {
151 return ((state & TIOCM_DTR) ? 1 : 0) | ((state & TIOCM_RTS) ? 2 : 0);
152 }
153
154 static int gigaset_set_modem_ctrl(struct cardstate *cs, unsigned old_state,
155 unsigned new_state)
156 {
157 struct usb_device *udev = cs->hw.usb->udev;
158 unsigned mask, val;
159 int r;
160
161 mask = tiocm_to_gigaset(old_state ^ new_state);
162 val = tiocm_to_gigaset(new_state);
163
164 gig_dbg(DEBUG_USBREQ, "set flags 0x%02x with mask 0x%02x", val, mask);
165 r = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 7, 0x41,
166 (val & 0xff) | ((mask & 0xff) << 8), 0,
167 NULL, 0, 2000 /* timeout? */);
168 if (r < 0)
169 return r;
170 return 0;
171 }
172
173 /*
174 * Set M105 configuration value
175 * using undocumented device commands reverse engineered from USB traces
176 * of the Siemens Windows driver
177 */
178 static int set_value(struct cardstate *cs, u8 req, u16 val)
179 {
180 struct usb_device *udev = cs->hw.usb->udev;
181 int r, r2;
182
183 gig_dbg(DEBUG_USBREQ, "request %02x (%04x)",
184 (unsigned)req, (unsigned)val);
185 r = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x12, 0x41,
186 0xf /*?*/, 0, NULL, 0, 2000 /*?*/);
187 /* no idea what this does */
188 if (r < 0) {
189 dev_err(&udev->dev, "error %d on request 0x12\n", -r);
190 return r;
191 }
192
193 r = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), req, 0x41,
194 val, 0, NULL, 0, 2000 /*?*/);
195 if (r < 0)
196 dev_err(&udev->dev, "error %d on request 0x%02x\n",
197 -r, (unsigned)req);
198
199 r2 = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x19, 0x41,
200 0, 0, cs->hw.usb->bchars, 6, 2000 /*?*/);
201 if (r2 < 0)
202 dev_err(&udev->dev, "error %d on request 0x19\n", -r2);
203
204 return r < 0 ? r : (r2 < 0 ? r2 : 0);
205 }
206
207 /*
208 * set the baud rate on the internal serial adapter
209 * using the undocumented parameter setting command
210 */
211 static int gigaset_baud_rate(struct cardstate *cs, unsigned cflag)
212 {
213 u16 val;
214 u32 rate;
215
216 cflag &= CBAUD;
217
218 switch (cflag) {
219 case B300: rate = 300; break;
220 case B600: rate = 600; break;
221 case B1200: rate = 1200; break;
222 case B2400: rate = 2400; break;
223 case B4800: rate = 4800; break;
224 case B9600: rate = 9600; break;
225 case B19200: rate = 19200; break;
226 case B38400: rate = 38400; break;
227 case B57600: rate = 57600; break;
228 case B115200: rate = 115200; break;
229 default:
230 rate = 9600;
231 dev_err(cs->dev, "unsupported baudrate request 0x%x,"
232 " using default of B9600\n", cflag);
233 }
234
235 val = 0x383fff / rate + 1;
236
237 return set_value(cs, 1, val);
238 }
239
240 /*
241 * set the line format on the internal serial adapter
242 * using the undocumented parameter setting command
243 */
244 static int gigaset_set_line_ctrl(struct cardstate *cs, unsigned cflag)
245 {
246 u16 val = 0;
247
248 /* set the parity */
249 if (cflag & PARENB)
250 val |= (cflag & PARODD) ? 0x10 : 0x20;
251
252 /* set the number of data bits */
253 switch (cflag & CSIZE) {
254 case CS5:
255 val |= 5 << 8; break;
256 case CS6:
257 val |= 6 << 8; break;
258 case CS7:
259 val |= 7 << 8; break;
260 case CS8:
261 val |= 8 << 8; break;
262 default:
263 dev_err(cs->dev, "CSIZE was not CS5-CS8, using default of 8\n");
264 val |= 8 << 8;
265 break;
266 }
267
268 /* set the number of stop bits */
269 if (cflag & CSTOPB) {
270 if ((cflag & CSIZE) == CS5)
271 val |= 1; /* 1.5 stop bits */
272 else
273 val |= 2; /* 2 stop bits */
274 }
275
276 return set_value(cs, 3, val);
277 }
278
279
280 /*============================================================================*/
281 static int gigaset_init_bchannel(struct bc_state *bcs)
282 {
283 /* nothing to do for M10x */
284 gigaset_bchannel_up(bcs);
285 return 0;
286 }
287
288 static int gigaset_close_bchannel(struct bc_state *bcs)
289 {
290 /* nothing to do for M10x */
291 gigaset_bchannel_down(bcs);
292 return 0;
293 }
294
295 static int write_modem(struct cardstate *cs);
296 static int send_cb(struct cardstate *cs, struct cmdbuf_t *cb);
297
298
299 /* Write tasklet handler: Continue sending current skb, or send command, or
300 * start sending an skb from the send queue.
301 */
302 static void gigaset_modem_fill(unsigned long data)
303 {
304 struct cardstate *cs = (struct cardstate *) data;
305 struct bc_state *bcs = &cs->bcs[0]; /* only one channel */
306 struct cmdbuf_t *cb;
307 int again;
308
309 gig_dbg(DEBUG_OUTPUT, "modem_fill");
310
311 if (cs->hw.usb->busy) {
312 gig_dbg(DEBUG_OUTPUT, "modem_fill: busy");
313 return;
314 }
315
316 do {
317 again = 0;
318 if (!bcs->tx_skb) { /* no skb is being sent */
319 cb = cs->cmdbuf;
320 if (cb) { /* commands to send? */
321 gig_dbg(DEBUG_OUTPUT, "modem_fill: cb");
322 if (send_cb(cs, cb) < 0) {
323 gig_dbg(DEBUG_OUTPUT,
324 "modem_fill: send_cb failed");
325 again = 1; /* no callback will be
326 called! */
327 }
328 } else { /* skbs to send? */
329 bcs->tx_skb = skb_dequeue(&bcs->squeue);
330 if (bcs->tx_skb)
331 gig_dbg(DEBUG_INTR,
332 "Dequeued skb (Adr: %lx)!",
333 (unsigned long) bcs->tx_skb);
334 }
335 }
336
337 if (bcs->tx_skb) {
338 gig_dbg(DEBUG_OUTPUT, "modem_fill: tx_skb");
339 if (write_modem(cs) < 0) {
340 gig_dbg(DEBUG_OUTPUT,
341 "modem_fill: write_modem failed");
342 again = 1; /* no callback will be called! */
343 }
344 }
345 } while (again);
346 }
347
348 /*
349 * Interrupt Input URB completion routine
350 */
351 static void gigaset_read_int_callback(struct urb *urb)
352 {
353 struct cardstate *cs = urb->context;
354 struct inbuf_t *inbuf = cs->inbuf;
355 int status = urb->status;
356 int r;
357 unsigned numbytes;
358 unsigned char *src;
359 unsigned long flags;
360
361 if (!status) {
362 numbytes = urb->actual_length;
363
364 if (numbytes) {
365 src = cs->hw.usb->rcvbuf;
366 if (unlikely(*src))
367 dev_warn(cs->dev,
368 "%s: There was no leading 0, but 0x%02x!\n",
369 __func__, (unsigned) *src);
370 ++src; /* skip leading 0x00 */
371 --numbytes;
372 if (gigaset_fill_inbuf(inbuf, src, numbytes)) {
373 gig_dbg(DEBUG_INTR, "%s-->BH", __func__);
374 gigaset_schedule_event(inbuf->cs);
375 }
376 } else
377 gig_dbg(DEBUG_INTR, "Received zero block length");
378 } else {
379 /* The urb might have been killed. */
380 gig_dbg(DEBUG_ANY, "%s - nonzero status received: %d",
381 __func__, status);
382 if (status == -ENOENT || status == -ESHUTDOWN)
383 /* killed or endpoint shutdown: don't resubmit */
384 return;
385 }
386
387 /* resubmit URB */
388 spin_lock_irqsave(&cs->lock, flags);
389 if (!cs->connected) {
390 spin_unlock_irqrestore(&cs->lock, flags);
391 pr_err("%s: disconnected\n", __func__);
392 return;
393 }
394 r = usb_submit_urb(urb, GFP_ATOMIC);
395 spin_unlock_irqrestore(&cs->lock, flags);
396 if (r)
397 dev_err(cs->dev, "error %d resubmitting URB\n", -r);
398 }
399
400
401 /* This callback routine is called when data was transmitted to the device. */
402 static void gigaset_write_bulk_callback(struct urb *urb)
403 {
404 struct cardstate *cs = urb->context;
405 int status = urb->status;
406 unsigned long flags;
407
408 switch (status) {
409 case 0: /* normal completion */
410 break;
411 case -ENOENT: /* killed */
412 gig_dbg(DEBUG_ANY, "%s: killed", __func__);
413 cs->hw.usb->busy = 0;
414 return;
415 default:
416 dev_err(cs->dev, "bulk transfer failed (status %d)\n",
417 -status);
418 /* That's all we can do. Communication problems
419 are handled by timeouts or network protocols. */
420 }
421
422 spin_lock_irqsave(&cs->lock, flags);
423 if (!cs->connected) {
424 pr_err("%s: disconnected\n", __func__);
425 } else {
426 cs->hw.usb->busy = 0;
427 tasklet_schedule(&cs->write_tasklet);
428 }
429 spin_unlock_irqrestore(&cs->lock, flags);
430 }
431
432 static int send_cb(struct cardstate *cs, struct cmdbuf_t *cb)
433 {
434 struct cmdbuf_t *tcb;
435 unsigned long flags;
436 int count;
437 int status = -ENOENT;
438 struct usb_cardstate *ucs = cs->hw.usb;
439
440 do {
441 if (!cb->len) {
442 tcb = cb;
443
444 spin_lock_irqsave(&cs->cmdlock, flags);
445 cs->cmdbytes -= cs->curlen;
446 gig_dbg(DEBUG_OUTPUT, "send_cb: sent %u bytes, %u left",
447 cs->curlen, cs->cmdbytes);
448 cs->cmdbuf = cb = cb->next;
449 if (cb) {
450 cb->prev = NULL;
451 cs->curlen = cb->len;
452 } else {
453 cs->lastcmdbuf = NULL;
454 cs->curlen = 0;
455 }
456 spin_unlock_irqrestore(&cs->cmdlock, flags);
457
458 if (tcb->wake_tasklet)
459 tasklet_schedule(tcb->wake_tasklet);
460 kfree(tcb);
461 }
462 if (cb) {
463 count = min(cb->len, ucs->bulk_out_size);
464 gig_dbg(DEBUG_OUTPUT, "send_cb: send %d bytes", count);
465
466 usb_fill_bulk_urb(ucs->bulk_out_urb, ucs->udev,
467 usb_sndbulkpipe(ucs->udev,
468 ucs->bulk_out_endpointAddr & 0x0f),
469 cb->buf + cb->offset, count,
470 gigaset_write_bulk_callback, cs);
471
472 cb->offset += count;
473 cb->len -= count;
474 ucs->busy = 1;
475
476 spin_lock_irqsave(&cs->lock, flags);
477 status = cs->connected ?
478 usb_submit_urb(ucs->bulk_out_urb, GFP_ATOMIC) :
479 -ENODEV;
480 spin_unlock_irqrestore(&cs->lock, flags);
481
482 if (status) {
483 ucs->busy = 0;
484 dev_err(cs->dev,
485 "could not submit urb (error %d)\n",
486 -status);
487 cb->len = 0; /* skip urb => remove cb+wakeup
488 in next loop cycle */
489 }
490 }
491 } while (cb && status); /* next command on error */
492
493 return status;
494 }
495
496 /* Send command to device. */
497 static int gigaset_write_cmd(struct cardstate *cs, struct cmdbuf_t *cb)
498 {
499 unsigned long flags;
500
501 gigaset_dbg_buffer(cs->mstate != MS_LOCKED ?
502 DEBUG_TRANSCMD : DEBUG_LOCKCMD,
503 "CMD Transmit", cb->len, cb->buf);
504
505 spin_lock_irqsave(&cs->cmdlock, flags);
506 cb->prev = cs->lastcmdbuf;
507 if (cs->lastcmdbuf)
508 cs->lastcmdbuf->next = cb;
509 else {
510 cs->cmdbuf = cb;
511 cs->curlen = cb->len;
512 }
513 cs->cmdbytes += cb->len;
514 cs->lastcmdbuf = cb;
515 spin_unlock_irqrestore(&cs->cmdlock, flags);
516
517 spin_lock_irqsave(&cs->lock, flags);
518 if (cs->connected)
519 tasklet_schedule(&cs->write_tasklet);
520 spin_unlock_irqrestore(&cs->lock, flags);
521 return cb->len;
522 }
523
524 static int gigaset_write_room(struct cardstate *cs)
525 {
526 unsigned bytes;
527
528 bytes = cs->cmdbytes;
529 return bytes < IF_WRITEBUF ? IF_WRITEBUF - bytes : 0;
530 }
531
532 static int gigaset_chars_in_buffer(struct cardstate *cs)
533 {
534 return cs->cmdbytes;
535 }
536
537 /*
538 * set the break characters on the internal serial adapter
539 * using undocumented device commands reverse engineered from USB traces
540 * of the Siemens Windows driver
541 */
542 static int gigaset_brkchars(struct cardstate *cs, const unsigned char buf[6])
543 {
544 struct usb_device *udev = cs->hw.usb->udev;
545
546 gigaset_dbg_buffer(DEBUG_USBREQ, "brkchars", 6, buf);
547 memcpy(cs->hw.usb->bchars, buf, 6);
548 return usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x19, 0x41,
549 0, 0, &buf, 6, 2000);
550 }
551
552 static int gigaset_freebcshw(struct bc_state *bcs)
553 {
554 /* unused */
555 return 1;
556 }
557
558 /* Initialize the b-channel structure */
559 static int gigaset_initbcshw(struct bc_state *bcs)
560 {
561 /* unused */
562 bcs->hw.usb = NULL;
563 return 1;
564 }
565
566 static void gigaset_reinitbcshw(struct bc_state *bcs)
567 {
568 /* nothing to do for M10x */
569 }
570
571 static void gigaset_freecshw(struct cardstate *cs)
572 {
573 tasklet_kill(&cs->write_tasklet);
574 kfree(cs->hw.usb);
575 }
576
577 static int gigaset_initcshw(struct cardstate *cs)
578 {
579 struct usb_cardstate *ucs;
580
581 cs->hw.usb = ucs =
582 kmalloc(sizeof(struct usb_cardstate), GFP_KERNEL);
583 if (!ucs) {
584 pr_err("out of memory\n");
585 return 0;
586 }
587
588 ucs->bchars[0] = 0;
589 ucs->bchars[1] = 0;
590 ucs->bchars[2] = 0;
591 ucs->bchars[3] = 0;
592 ucs->bchars[4] = 0x11;
593 ucs->bchars[5] = 0x13;
594 ucs->bulk_out_buffer = NULL;
595 ucs->bulk_out_urb = NULL;
596 ucs->read_urb = NULL;
597 tasklet_init(&cs->write_tasklet,
598 gigaset_modem_fill, (unsigned long) cs);
599
600 return 1;
601 }
602
603 /* Send data from current skb to the device. */
604 static int write_modem(struct cardstate *cs)
605 {
606 int ret = 0;
607 int count;
608 struct bc_state *bcs = &cs->bcs[0]; /* only one channel */
609 struct usb_cardstate *ucs = cs->hw.usb;
610 unsigned long flags;
611
612 gig_dbg(DEBUG_OUTPUT, "len: %d...", bcs->tx_skb->len);
613
614 if (!bcs->tx_skb->len) {
615 dev_kfree_skb_any(bcs->tx_skb);
616 bcs->tx_skb = NULL;
617 return -EINVAL;
618 }
619
620 /* Copy data to bulk out buffer and transmit data */
621 count = min(bcs->tx_skb->len, (unsigned) ucs->bulk_out_size);
622 skb_copy_from_linear_data(bcs->tx_skb, ucs->bulk_out_buffer, count);
623 skb_pull(bcs->tx_skb, count);
624 ucs->busy = 1;
625 gig_dbg(DEBUG_OUTPUT, "write_modem: send %d bytes", count);
626
627 spin_lock_irqsave(&cs->lock, flags);
628 if (cs->connected) {
629 usb_fill_bulk_urb(ucs->bulk_out_urb, ucs->udev,
630 usb_sndbulkpipe(ucs->udev,
631 ucs->bulk_out_endpointAddr &
632 0x0f),
633 ucs->bulk_out_buffer, count,
634 gigaset_write_bulk_callback, cs);
635 ret = usb_submit_urb(ucs->bulk_out_urb, GFP_ATOMIC);
636 } else {
637 ret = -ENODEV;
638 }
639 spin_unlock_irqrestore(&cs->lock, flags);
640
641 if (ret) {
642 dev_err(cs->dev, "could not submit urb (error %d)\n", -ret);
643 ucs->busy = 0;
644 }
645
646 if (!bcs->tx_skb->len) {
647 /* skb sent completely */
648 gigaset_skb_sent(bcs, bcs->tx_skb);
649
650 gig_dbg(DEBUG_INTR, "kfree skb (Adr: %lx)!",
651 (unsigned long) bcs->tx_skb);
652 dev_kfree_skb_any(bcs->tx_skb);
653 bcs->tx_skb = NULL;
654 }
655
656 return ret;
657 }
658
659 static int gigaset_probe(struct usb_interface *interface,
660 const struct usb_device_id *id)
661 {
662 int retval;
663 struct usb_device *udev = interface_to_usbdev(interface);
664 struct usb_host_interface *hostif = interface->cur_altsetting;
665 struct cardstate *cs = NULL;
666 struct usb_cardstate *ucs = NULL;
667 struct usb_endpoint_descriptor *endpoint;
668 int buffer_size;
669
670 gig_dbg(DEBUG_ANY, "%s: Check if device matches ...", __func__);
671
672 /* See if the device offered us matches what we can accept */
673 if ((le16_to_cpu(udev->descriptor.idVendor) != USB_M105_VENDOR_ID) ||
674 (le16_to_cpu(udev->descriptor.idProduct) != USB_M105_PRODUCT_ID)) {
675 gig_dbg(DEBUG_ANY, "device ID (0x%x, 0x%x) not for me - skip",
676 le16_to_cpu(udev->descriptor.idVendor),
677 le16_to_cpu(udev->descriptor.idProduct));
678 return -ENODEV;
679 }
680 if (hostif->desc.bInterfaceNumber != 0) {
681 gig_dbg(DEBUG_ANY, "interface %d not for me - skip",
682 hostif->desc.bInterfaceNumber);
683 return -ENODEV;
684 }
685 if (hostif->desc.bAlternateSetting != 0) {
686 dev_notice(&udev->dev, "unsupported altsetting %d - skip",
687 hostif->desc.bAlternateSetting);
688 return -ENODEV;
689 }
690 if (hostif->desc.bInterfaceClass != 255) {
691 dev_notice(&udev->dev, "unsupported interface class %d - skip",
692 hostif->desc.bInterfaceClass);
693 return -ENODEV;
694 }
695
696 dev_info(&udev->dev, "%s: Device matched ... !\n", __func__);
697
698 /* allocate memory for our device state and initialize it */
699 cs = gigaset_initcs(driver, 1, 1, 0, cidmode, GIGASET_MODULENAME);
700 if (!cs)
701 return -ENODEV;
702 ucs = cs->hw.usb;
703
704 /* save off device structure ptrs for later use */
705 usb_get_dev(udev);
706 ucs->udev = udev;
707 ucs->interface = interface;
708 cs->dev = &interface->dev;
709
710 /* save address of controller structure */
711 usb_set_intfdata(interface, cs);
712
713 endpoint = &hostif->endpoint[0].desc;
714
715 buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
716 ucs->bulk_out_size = buffer_size;
717 ucs->bulk_out_endpointAddr = endpoint->bEndpointAddress;
718 ucs->bulk_out_buffer = kmalloc(buffer_size, GFP_KERNEL);
719 if (!ucs->bulk_out_buffer) {
720 dev_err(cs->dev, "Couldn't allocate bulk_out_buffer\n");
721 retval = -ENOMEM;
722 goto error;
723 }
724
725 ucs->bulk_out_urb = usb_alloc_urb(0, GFP_KERNEL);
726 if (!ucs->bulk_out_urb) {
727 dev_err(cs->dev, "Couldn't allocate bulk_out_urb\n");
728 retval = -ENOMEM;
729 goto error;
730 }
731
732 endpoint = &hostif->endpoint[1].desc;
733
734 ucs->busy = 0;
735
736 ucs->read_urb = usb_alloc_urb(0, GFP_KERNEL);
737 if (!ucs->read_urb) {
738 dev_err(cs->dev, "No free urbs available\n");
739 retval = -ENOMEM;
740 goto error;
741 }
742 buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
743 ucs->rcvbuf_size = buffer_size;
744 ucs->int_in_endpointAddr = endpoint->bEndpointAddress;
745 ucs->rcvbuf = kmalloc(buffer_size, GFP_KERNEL);
746 if (!ucs->rcvbuf) {
747 dev_err(cs->dev, "Couldn't allocate rcvbuf\n");
748 retval = -ENOMEM;
749 goto error;
750 }
751 /* Fill the interrupt urb and send it to the core */
752 usb_fill_int_urb(ucs->read_urb, udev,
753 usb_rcvintpipe(udev,
754 endpoint->bEndpointAddress & 0x0f),
755 ucs->rcvbuf, buffer_size,
756 gigaset_read_int_callback,
757 cs, endpoint->bInterval);
758
759 retval = usb_submit_urb(ucs->read_urb, GFP_KERNEL);
760 if (retval) {
761 dev_err(cs->dev, "Could not submit URB (error %d)\n", -retval);
762 goto error;
763 }
764
765 /* tell common part that the device is ready */
766 if (startmode == SM_LOCKED)
767 cs->mstate = MS_LOCKED;
768
769 if (!gigaset_start(cs)) {
770 tasklet_kill(&cs->write_tasklet);
771 retval = -ENODEV;
772 goto error;
773 }
774 return 0;
775
776 error:
777 usb_kill_urb(ucs->read_urb);
778 kfree(ucs->bulk_out_buffer);
779 usb_free_urb(ucs->bulk_out_urb);
780 kfree(ucs->rcvbuf);
781 usb_free_urb(ucs->read_urb);
782 usb_set_intfdata(interface, NULL);
783 ucs->read_urb = ucs->bulk_out_urb = NULL;
784 ucs->rcvbuf = ucs->bulk_out_buffer = NULL;
785 usb_put_dev(ucs->udev);
786 ucs->udev = NULL;
787 ucs->interface = NULL;
788 gigaset_freecs(cs);
789 return retval;
790 }
791
792 static void gigaset_disconnect(struct usb_interface *interface)
793 {
794 struct cardstate *cs;
795 struct usb_cardstate *ucs;
796
797 cs = usb_get_intfdata(interface);
798 ucs = cs->hw.usb;
799
800 dev_info(cs->dev, "disconnecting Gigaset USB adapter\n");
801
802 usb_kill_urb(ucs->read_urb);
803
804 gigaset_stop(cs);
805
806 usb_set_intfdata(interface, NULL);
807 tasklet_kill(&cs->write_tasklet);
808
809 usb_kill_urb(ucs->bulk_out_urb);
810
811 kfree(ucs->bulk_out_buffer);
812 usb_free_urb(ucs->bulk_out_urb);
813 kfree(ucs->rcvbuf);
814 usb_free_urb(ucs->read_urb);
815 ucs->read_urb = ucs->bulk_out_urb = NULL;
816 ucs->rcvbuf = ucs->bulk_out_buffer = NULL;
817
818 usb_put_dev(ucs->udev);
819 ucs->interface = NULL;
820 ucs->udev = NULL;
821 cs->dev = NULL;
822 gigaset_freecs(cs);
823 }
824
825 /* gigaset_suspend
826 * This function is called before the USB connection is suspended or reset.
827 */
828 static int gigaset_suspend(struct usb_interface *intf, pm_message_t message)
829 {
830 struct cardstate *cs = usb_get_intfdata(intf);
831
832 /* stop activity */
833 cs->connected = 0; /* prevent rescheduling */
834 usb_kill_urb(cs->hw.usb->read_urb);
835 tasklet_kill(&cs->write_tasklet);
836 usb_kill_urb(cs->hw.usb->bulk_out_urb);
837
838 gig_dbg(DEBUG_SUSPEND, "suspend complete");
839 return 0;
840 }
841
842 /* gigaset_resume
843 * This function is called after the USB connection has been resumed or reset.
844 */
845 static int gigaset_resume(struct usb_interface *intf)
846 {
847 struct cardstate *cs = usb_get_intfdata(intf);
848 int rc;
849
850 /* resubmit interrupt URB */
851 cs->connected = 1;
852 rc = usb_submit_urb(cs->hw.usb->read_urb, GFP_KERNEL);
853 if (rc) {
854 dev_err(cs->dev, "Could not submit read URB (error %d)\n", -rc);
855 return rc;
856 }
857
858 gig_dbg(DEBUG_SUSPEND, "resume complete");
859 return 0;
860 }
861
862 /* gigaset_pre_reset
863 * This function is called before the USB connection is reset.
864 */
865 static int gigaset_pre_reset(struct usb_interface *intf)
866 {
867 /* same as suspend */
868 return gigaset_suspend(intf, PMSG_ON);
869 }
870
871 static const struct gigaset_ops ops = {
872 gigaset_write_cmd,
873 gigaset_write_room,
874 gigaset_chars_in_buffer,
875 gigaset_brkchars,
876 gigaset_init_bchannel,
877 gigaset_close_bchannel,
878 gigaset_initbcshw,
879 gigaset_freebcshw,
880 gigaset_reinitbcshw,
881 gigaset_initcshw,
882 gigaset_freecshw,
883 gigaset_set_modem_ctrl,
884 gigaset_baud_rate,
885 gigaset_set_line_ctrl,
886 gigaset_m10x_send_skb,
887 gigaset_m10x_input,
888 };
889
890 /*
891 * This function is called while kernel-module is loaded
892 */
893 static int __init usb_gigaset_init(void)
894 {
895 int result;
896
897 /* allocate memory for our driver state and initialize it */
898 driver = gigaset_initdriver(GIGASET_MINOR, GIGASET_MINORS,
899 GIGASET_MODULENAME, GIGASET_DEVNAME,
900 &ops, THIS_MODULE);
901 if (driver == NULL)
902 goto error;
903
904 /* register this driver with the USB subsystem */
905 result = usb_register(&gigaset_usb_driver);
906 if (result < 0) {
907 pr_err("error %d registering USB driver\n", -result);
908 goto error;
909 }
910
911 pr_info(DRIVER_DESC "\n");
912 return 0;
913
914 error:
915 if (driver)
916 gigaset_freedriver(driver);
917 driver = NULL;
918 return -1;
919 }
920
921 /*
922 * This function is called while unloading the kernel-module
923 */
924 static void __exit usb_gigaset_exit(void)
925 {
926 int i;
927
928 gigaset_blockdriver(driver); /* => probe will fail
929 * => no gigaset_start any more
930 */
931
932 /* stop all connected devices */
933 for (i = 0; i < driver->minors; i++)
934 gigaset_shutdown(driver->cs + i);
935
936 /* from now on, no isdn callback should be possible */
937
938 /* deregister this driver with the USB subsystem */
939 usb_deregister(&gigaset_usb_driver);
940 /* this will call the disconnect-callback */
941 /* from now on, no disconnect/probe callback should be running */
942
943 gigaset_freedriver(driver);
944 driver = NULL;
945 }
946
947
948 module_init(usb_gigaset_init);
949 module_exit(usb_gigaset_exit);
950
951 MODULE_AUTHOR(DRIVER_AUTHOR);
952 MODULE_DESCRIPTION(DRIVER_DESC);
953
954 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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