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Linux 2.6.34-rc3
[pohmelfs.git] / drivers / isdn / gigaset / usb-gigaset.c
blob9430a2bbb523b138fac9dceb95dc369d47b892f9
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
20 #include <linux/errno.h>
21 #include <linux/init.h>
22 #include <linux/slab.h>
23 #include <linux/usb.h>
24 #include <linux/module.h>
25 #include <linux/moduleparam.h>
26
27 /* Version Information */
28 #define DRIVER_AUTHOR "Hansjoerg Lipp <hjlipp@web.de>, Stefan Eilers"
29 #define DRIVER_DESC "USB Driver for Gigaset 307x using M105"
30
31 /* Module parameters */
32
33 static int startmode = SM_ISDN;
34 static int cidmode = 1;
35
36 module_param(startmode, int, S_IRUGO);
37 module_param(cidmode, int, S_IRUGO);
38 MODULE_PARM_DESC(startmode, "start in isdn4linux mode");
39 MODULE_PARM_DESC(cidmode, "Call-ID mode");
40
41 #define GIGASET_MINORS 1
42 #define GIGASET_MINOR 8
43 #define GIGASET_MODULENAME "usb_gigaset"
44 #define GIGASET_DEVNAME "ttyGU"
45
46 #define IF_WRITEBUF 2000 /* arbitrary limit */
47
48 /* Values for the Gigaset M105 Data */
49 #define USB_M105_VENDOR_ID 0x0681
50 #define USB_M105_PRODUCT_ID 0x0009
51
52 /* table of devices that work with this driver */
53 static const struct usb_device_id gigaset_table[] = {
54 { USB_DEVICE(USB_M105_VENDOR_ID, USB_M105_PRODUCT_ID) },
55 { } /* Terminating entry */
56 };
57
58 MODULE_DEVICE_TABLE(usb, gigaset_table);
59
60 /*
61 * Control requests (empty fields: 00)
62 *
63 * RT|RQ|VALUE|INDEX|LEN |DATA
64 * In:
65 * C1 08 01
66 * Get flags (1 byte). Bits: 0=dtr,1=rts,3-7:?
67 * C1 0F ll ll
68 * Get device information/status (llll: 0x200 and 0x40 seen).
69 * Real size: I only saw MIN(llll,0x64).
70 * Contents: seems to be always the same...
71 * offset 0x00: Length of this structure (0x64) (len: 1,2,3 bytes)
72 * offset 0x3c: String (16 bit chars): "MCCI USB Serial V2.0"
73 * rest: ?
74 * Out:
75 * 41 11
76 * Initialize/reset device ?
77 * 41 00 xx 00
78 * ? (xx=00 or 01; 01 on start, 00 on close)
79 * 41 07 vv mm
80 * Set/clear flags vv=value, mm=mask (see RQ 08)
81 * 41 12 xx
82 * Used before the following configuration requests are issued
83 * (with xx=0x0f). I've seen other values<0xf, though.
84 * 41 01 xx xx
85 * Set baud rate. xxxx=ceil(0x384000/rate)=trunc(0x383fff/rate)+1.
86 * 41 03 ps bb
87 * Set byte size and parity. p: 0x20=even,0x10=odd,0x00=no parity
88 * [ 0x30: m, 0x40: s ]
89 * [s: 0: 1 stop bit; 1: 1.5; 2: 2]
90 * bb: bits/byte (seen 7 and 8)
91 * 41 13 -- -- -- -- 10 00 ww 00 00 00 xx 00 00 00 yy 00 00 00 zz 00 00 00
92 * ??
93 * Initialization: 01, 40, 00, 00
94 * Open device: 00 40, 00, 00
95 * yy and zz seem to be equal, either 0x00 or 0x0a
96 * (ww,xx) pairs seen: (00,00), (00,40), (01,40), (09,80), (19,80)
97 * 41 19 -- -- -- -- 06 00 00 00 00 xx 11 13
98 * Used after every "configuration sequence" (RQ 12, RQs 01/03/13).
99 * xx is usually 0x00 but was 0x7e before starting data transfer
100 * in unimodem mode. So, this might be an array of characters that
101 * need special treatment ("commit all bufferd data"?), 11=^Q, 13=^S.
102 *
103 * Unimodem mode: use "modprobe ppp_async flag_time=0" as the device _needs_ two
104 * flags per packet.
105 */
106
107 /* functions called if a device of this driver is connected/disconnected */
108 static int gigaset_probe(struct usb_interface *interface,
109 const struct usb_device_id *id);
110 static void gigaset_disconnect(struct usb_interface *interface);
111
112 /* functions called before/after suspend */
113 static int gigaset_suspend(struct usb_interface *intf, pm_message_t message);
114 static int gigaset_resume(struct usb_interface *intf);
115 static int gigaset_pre_reset(struct usb_interface *intf);
116
117 static struct gigaset_driver *driver;
118
119 /* usb specific object needed to register this driver with the usb subsystem */
120 static struct usb_driver gigaset_usb_driver = {
121 .name = GIGASET_MODULENAME,
122 .probe = gigaset_probe,
123 .disconnect = gigaset_disconnect,
124 .id_table = gigaset_table,
125 .suspend = gigaset_suspend,
126 .resume = gigaset_resume,
127 .reset_resume = gigaset_resume,
128 .pre_reset = gigaset_pre_reset,
129 .post_reset = gigaset_resume,
130 };
131
132 struct usb_cardstate {
133 struct usb_device *udev; /* usb device pointer */
134 struct usb_interface *interface; /* interface for this device */
135 int busy; /* bulk output in progress */
136
137 /* Output buffer */
138 unsigned char *bulk_out_buffer;
139 int bulk_out_size;
140 __u8 bulk_out_endpointAddr;
141 struct urb *bulk_out_urb;
142
143 /* Input buffer */
144 unsigned char *rcvbuf;
145 int rcvbuf_size;
146 struct urb *read_urb;
147 __u8 int_in_endpointAddr;
148
149 char bchars[6]; /* for request 0x19 */
150 };
151
152 static inline unsigned tiocm_to_gigaset(unsigned state)
153 {
154 return ((state & TIOCM_DTR) ? 1 : 0) | ((state & TIOCM_RTS) ? 2 : 0);
155 }
156
157 static int gigaset_set_modem_ctrl(struct cardstate *cs, unsigned old_state,
158 unsigned new_state)
159 {
160 struct usb_device *udev = cs->hw.usb->udev;
161 unsigned mask, val;
162 int r;
163
164 mask = tiocm_to_gigaset(old_state ^ new_state);
165 val = tiocm_to_gigaset(new_state);
166
167 gig_dbg(DEBUG_USBREQ, "set flags 0x%02x with mask 0x%02x", val, mask);
168 r = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 7, 0x41,
169 (val & 0xff) | ((mask & 0xff) << 8), 0,
170 NULL, 0, 2000 /* timeout? */);
171 if (r < 0)
172 return r;
173 return 0;
174 }
175
176 /*
177 * Set M105 configuration value
178 * using undocumented device commands reverse engineered from USB traces
179 * of the Siemens Windows driver
180 */
181 static int set_value(struct cardstate *cs, u8 req, u16 val)
182 {
183 struct usb_device *udev = cs->hw.usb->udev;
184 int r, r2;
185
186 gig_dbg(DEBUG_USBREQ, "request %02x (%04x)",
187 (unsigned)req, (unsigned)val);
188 r = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x12, 0x41,
189 0xf /*?*/, 0, NULL, 0, 2000 /*?*/);
190 /* no idea what this does */
191 if (r < 0) {
192 dev_err(&udev->dev, "error %d on request 0x12\n", -r);
193 return r;
194 }
195
196 r = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), req, 0x41,
197 val, 0, NULL, 0, 2000 /*?*/);
198 if (r < 0)
199 dev_err(&udev->dev, "error %d on request 0x%02x\n",
200 -r, (unsigned)req);
201
202 r2 = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x19, 0x41,
203 0, 0, cs->hw.usb->bchars, 6, 2000 /*?*/);
204 if (r2 < 0)
205 dev_err(&udev->dev, "error %d on request 0x19\n", -r2);
206
207 return r < 0 ? r : (r2 < 0 ? r2 : 0);
208 }
209
210 /*
211 * set the baud rate on the internal serial adapter
212 * using the undocumented parameter setting command
213 */
214 static int gigaset_baud_rate(struct cardstate *cs, unsigned cflag)
215 {
216 u16 val;
217 u32 rate;
218
219 cflag &= CBAUD;
220
221 switch (cflag) {
222 case B300: rate = 300; break;
223 case B600: rate = 600; break;
224 case B1200: rate = 1200; break;
225 case B2400: rate = 2400; break;
226 case B4800: rate = 4800; break;
227 case B9600: rate = 9600; break;
228 case B19200: rate = 19200; break;
229 case B38400: rate = 38400; break;
230 case B57600: rate = 57600; break;
231 case B115200: rate = 115200; break;
232 default:
233 rate = 9600;
234 dev_err(cs->dev, "unsupported baudrate request 0x%x,"
235 " using default of B9600\n", cflag);
236 }
237
238 val = 0x383fff / rate + 1;
239
240 return set_value(cs, 1, val);
241 }
242
243 /*
244 * set the line format on the internal serial adapter
245 * using the undocumented parameter setting command
246 */
247 static int gigaset_set_line_ctrl(struct cardstate *cs, unsigned cflag)
248 {
249 u16 val = 0;
250
251 /* set the parity */
252 if (cflag & PARENB)
253 val |= (cflag & PARODD) ? 0x10 : 0x20;
254
255 /* set the number of data bits */
256 switch (cflag & CSIZE) {
257 case CS5:
258 val |= 5 << 8; break;
259 case CS6:
260 val |= 6 << 8; break;
261 case CS7:
262 val |= 7 << 8; break;
263 case CS8:
264 val |= 8 << 8; break;
265 default:
266 dev_err(cs->dev, "CSIZE was not CS5-CS8, using default of 8\n");
267 val |= 8 << 8;
268 break;
269 }
270
271 /* set the number of stop bits */
272 if (cflag & CSTOPB) {
273 if ((cflag & CSIZE) == CS5)
274 val |= 1; /* 1.5 stop bits */
275 else
276 val |= 2; /* 2 stop bits */
277 }
278
279 return set_value(cs, 3, val);
280 }
281
282
283 /*============================================================================*/
284 static int gigaset_init_bchannel(struct bc_state *bcs)
285 {
286 /* nothing to do for M10x */
287 gigaset_bchannel_up(bcs);
288 return 0;
289 }
290
291 static int gigaset_close_bchannel(struct bc_state *bcs)
292 {
293 /* nothing to do for M10x */
294 gigaset_bchannel_down(bcs);
295 return 0;
296 }
297
298 static int write_modem(struct cardstate *cs);
299 static int send_cb(struct cardstate *cs, struct cmdbuf_t *cb);
300
301
302 /* Write tasklet handler: Continue sending current skb, or send command, or
303 * start sending an skb from the send queue.
304 */
305 static void gigaset_modem_fill(unsigned long data)
306 {
307 struct cardstate *cs = (struct cardstate *) data;
308 struct bc_state *bcs = &cs->bcs[0]; /* only one channel */
309 struct cmdbuf_t *cb;
310 int again;
311
312 gig_dbg(DEBUG_OUTPUT, "modem_fill");
313
314 if (cs->hw.usb->busy) {
315 gig_dbg(DEBUG_OUTPUT, "modem_fill: busy");
316 return;
317 }
318
319 do {
320 again = 0;
321 if (!bcs->tx_skb) { /* no skb is being sent */
322 cb = cs->cmdbuf;
323 if (cb) { /* commands to send? */
324 gig_dbg(DEBUG_OUTPUT, "modem_fill: cb");
325 if (send_cb(cs, cb) < 0) {
326 gig_dbg(DEBUG_OUTPUT,
327 "modem_fill: send_cb failed");
328 again = 1; /* no callback will be
329 called! */
330 }
331 } else { /* skbs to send? */
332 bcs->tx_skb = skb_dequeue(&bcs->squeue);
333 if (bcs->tx_skb)
334 gig_dbg(DEBUG_INTR,
335 "Dequeued skb (Adr: %lx)!",
336 (unsigned long) bcs->tx_skb);
337 }
338 }
339
340 if (bcs->tx_skb) {
341 gig_dbg(DEBUG_OUTPUT, "modem_fill: tx_skb");
342 if (write_modem(cs) < 0) {
343 gig_dbg(DEBUG_OUTPUT,
344 "modem_fill: write_modem failed");
345 again = 1; /* no callback will be called! */
346 }
347 }
348 } while (again);
349 }
350
351 /*
352 * Interrupt Input URB completion routine
353 */
354 static void gigaset_read_int_callback(struct urb *urb)
355 {
356 struct cardstate *cs = urb->context;
357 struct inbuf_t *inbuf = cs->inbuf;
358 int status = urb->status;
359 int r;
360 unsigned numbytes;
361 unsigned char *src;
362 unsigned long flags;
363
364 if (!status) {
365 numbytes = urb->actual_length;
366
367 if (numbytes) {
368 src = cs->hw.usb->rcvbuf;
369 if (unlikely(*src))
370 dev_warn(cs->dev,
371 "%s: There was no leading 0, but 0x%02x!\n",
372 __func__, (unsigned) *src);
373 ++src; /* skip leading 0x00 */
374 --numbytes;
375 if (gigaset_fill_inbuf(inbuf, src, numbytes)) {
376 gig_dbg(DEBUG_INTR, "%s-->BH", __func__);
377 gigaset_schedule_event(inbuf->cs);
378 }
379 } else
380 gig_dbg(DEBUG_INTR, "Received zero block length");
381 } else {
382 /* The urb might have been killed. */
383 gig_dbg(DEBUG_ANY, "%s - nonzero status received: %d",
384 __func__, status);
385 if (status == -ENOENT || status == -ESHUTDOWN)
386 /* killed or endpoint shutdown: don't resubmit */
387 return;
388 }
389
390 /* resubmit URB */
391 spin_lock_irqsave(&cs->lock, flags);
392 if (!cs->connected) {
393 spin_unlock_irqrestore(&cs->lock, flags);
394 pr_err("%s: disconnected\n", __func__);
395 return;
396 }
397 r = usb_submit_urb(urb, GFP_ATOMIC);
398 spin_unlock_irqrestore(&cs->lock, flags);
399 if (r)
400 dev_err(cs->dev, "error %d resubmitting URB\n", -r);
401 }
402
403
404 /* This callback routine is called when data was transmitted to the device. */
405 static void gigaset_write_bulk_callback(struct urb *urb)
406 {
407 struct cardstate *cs = urb->context;
408 int status = urb->status;
409 unsigned long flags;
410
411 switch (status) {
412 case 0: /* normal completion */
413 break;
414 case -ENOENT: /* killed */
415 gig_dbg(DEBUG_ANY, "%s: killed", __func__);
416 cs->hw.usb->busy = 0;
417 return;
418 default:
419 dev_err(cs->dev, "bulk transfer failed (status %d)\n",
420 -status);
421 /* That's all we can do. Communication problems
422 are handled by timeouts or network protocols. */
423 }
424
425 spin_lock_irqsave(&cs->lock, flags);
426 if (!cs->connected) {
427 pr_err("%s: disconnected\n", __func__);
428 } else {
429 cs->hw.usb->busy = 0;
430 tasklet_schedule(&cs->write_tasklet);
431 }
432 spin_unlock_irqrestore(&cs->lock, flags);
433 }
434
435 static int send_cb(struct cardstate *cs, struct cmdbuf_t *cb)
436 {
437 struct cmdbuf_t *tcb;
438 unsigned long flags;
439 int count;
440 int status = -ENOENT;
441 struct usb_cardstate *ucs = cs->hw.usb;
442
443 do {
444 if (!cb->len) {
445 tcb = cb;
446
447 spin_lock_irqsave(&cs->cmdlock, flags);
448 cs->cmdbytes -= cs->curlen;
449 gig_dbg(DEBUG_OUTPUT, "send_cb: sent %u bytes, %u left",
450 cs->curlen, cs->cmdbytes);
451 cs->cmdbuf = cb = cb->next;
452 if (cb) {
453 cb->prev = NULL;
454 cs->curlen = cb->len;
455 } else {
456 cs->lastcmdbuf = NULL;
457 cs->curlen = 0;
458 }
459 spin_unlock_irqrestore(&cs->cmdlock, flags);
460
461 if (tcb->wake_tasklet)
462 tasklet_schedule(tcb->wake_tasklet);
463 kfree(tcb);
464 }
465 if (cb) {
466 count = min(cb->len, ucs->bulk_out_size);
467 gig_dbg(DEBUG_OUTPUT, "send_cb: send %d bytes", count);
468
469 usb_fill_bulk_urb(ucs->bulk_out_urb, ucs->udev,
470 usb_sndbulkpipe(ucs->udev,
471 ucs->bulk_out_endpointAddr & 0x0f),
472 cb->buf + cb->offset, count,
473 gigaset_write_bulk_callback, cs);
474
475 cb->offset += count;
476 cb->len -= count;
477 ucs->busy = 1;
478
479 spin_lock_irqsave(&cs->lock, flags);
480 status = cs->connected ?
481 usb_submit_urb(ucs->bulk_out_urb, GFP_ATOMIC) :
482 -ENODEV;
483 spin_unlock_irqrestore(&cs->lock, flags);
484
485 if (status) {
486 ucs->busy = 0;
487 dev_err(cs->dev,
488 "could not submit urb (error %d)\n",
489 -status);
490 cb->len = 0; /* skip urb => remove cb+wakeup
491 in next loop cycle */
492 }
493 }
494 } while (cb && status); /* next command on error */
495
496 return status;
497 }
498
499 /* Send command to device. */
500 static int gigaset_write_cmd(struct cardstate *cs, const unsigned char *buf,
501 int len, struct tasklet_struct *wake_tasklet)
502 {
503 struct cmdbuf_t *cb;
504 unsigned long flags;
505
506 gigaset_dbg_buffer(cs->mstate != MS_LOCKED ?
507 DEBUG_TRANSCMD : DEBUG_LOCKCMD,
508 "CMD Transmit", len, buf);
509
510 if (len <= 0)
511 return 0;
512 cb = kmalloc(sizeof(struct cmdbuf_t) + len, GFP_ATOMIC);
513 if (!cb) {
514 dev_err(cs->dev, "%s: out of memory\n", __func__);
515 return -ENOMEM;
516 }
517
518 memcpy(cb->buf, buf, len);
519 cb->len = len;
520 cb->offset = 0;
521 cb->next = NULL;
522 cb->wake_tasklet = wake_tasklet;
523
524 spin_lock_irqsave(&cs->cmdlock, flags);
525 cb->prev = cs->lastcmdbuf;
526 if (cs->lastcmdbuf)
527 cs->lastcmdbuf->next = cb;
528 else {
529 cs->cmdbuf = cb;
530 cs->curlen = len;
531 }
532 cs->cmdbytes += len;
533 cs->lastcmdbuf = cb;
534 spin_unlock_irqrestore(&cs->cmdlock, flags);
535
536 spin_lock_irqsave(&cs->lock, flags);
537 if (cs->connected)
538 tasklet_schedule(&cs->write_tasklet);
539 spin_unlock_irqrestore(&cs->lock, flags);
540 return len;
541 }
542
543 static int gigaset_write_room(struct cardstate *cs)
544 {
545 unsigned bytes;
546
547 bytes = cs->cmdbytes;
548 return bytes < IF_WRITEBUF ? IF_WRITEBUF - bytes : 0;
549 }
550
551 static int gigaset_chars_in_buffer(struct cardstate *cs)
552 {
553 return cs->cmdbytes;
554 }
555
556 /*
557 * set the break characters on the internal serial adapter
558 * using undocumented device commands reverse engineered from USB traces
559 * of the Siemens Windows driver
560 */
561 static int gigaset_brkchars(struct cardstate *cs, const unsigned char buf[6])
562 {
563 struct usb_device *udev = cs->hw.usb->udev;
564
565 gigaset_dbg_buffer(DEBUG_USBREQ, "brkchars", 6, buf);
566 memcpy(cs->hw.usb->bchars, buf, 6);
567 return usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x19, 0x41,
568 0, 0, &buf, 6, 2000);
569 }
570
571 static int gigaset_freebcshw(struct bc_state *bcs)
572 {
573 /* unused */
574 return 1;
575 }
576
577 /* Initialize the b-channel structure */
578 static int gigaset_initbcshw(struct bc_state *bcs)
579 {
580 /* unused */
581 bcs->hw.usb = NULL;
582 return 1;
583 }
584
585 static void gigaset_reinitbcshw(struct bc_state *bcs)
586 {
587 /* nothing to do for M10x */
588 }
589
590 static void gigaset_freecshw(struct cardstate *cs)
591 {
592 tasklet_kill(&cs->write_tasklet);
593 kfree(cs->hw.usb);
594 }
595
596 static int gigaset_initcshw(struct cardstate *cs)
597 {
598 struct usb_cardstate *ucs;
599
600 cs->hw.usb = ucs =
601 kmalloc(sizeof(struct usb_cardstate), GFP_KERNEL);
602 if (!ucs) {
603 pr_err("out of memory\n");
604 return 0;
605 }
606
607 ucs->bchars[0] = 0;
608 ucs->bchars[1] = 0;
609 ucs->bchars[2] = 0;
610 ucs->bchars[3] = 0;
611 ucs->bchars[4] = 0x11;
612 ucs->bchars[5] = 0x13;
613 ucs->bulk_out_buffer = NULL;
614 ucs->bulk_out_urb = NULL;
615 ucs->read_urb = NULL;
616 tasklet_init(&cs->write_tasklet,
617 gigaset_modem_fill, (unsigned long) cs);
618
619 return 1;
620 }
621
622 /* Send data from current skb to the device. */
623 static int write_modem(struct cardstate *cs)
624 {
625 int ret = 0;
626 int count;
627 struct bc_state *bcs = &cs->bcs[0]; /* only one channel */
628 struct usb_cardstate *ucs = cs->hw.usb;
629 unsigned long flags;
630
631 gig_dbg(DEBUG_OUTPUT, "len: %d...", bcs->tx_skb->len);
632
633 if (!bcs->tx_skb->len) {
634 dev_kfree_skb_any(bcs->tx_skb);
635 bcs->tx_skb = NULL;
636 return -EINVAL;
637 }
638
639 /* Copy data to bulk out buffer and transmit data */
640 count = min(bcs->tx_skb->len, (unsigned) ucs->bulk_out_size);
641 skb_copy_from_linear_data(bcs->tx_skb, ucs->bulk_out_buffer, count);
642 skb_pull(bcs->tx_skb, count);
643 ucs->busy = 1;
644 gig_dbg(DEBUG_OUTPUT, "write_modem: send %d bytes", count);
645
646 spin_lock_irqsave(&cs->lock, flags);
647 if (cs->connected) {
648 usb_fill_bulk_urb(ucs->bulk_out_urb, ucs->udev,
649 usb_sndbulkpipe(ucs->udev,
650 ucs->bulk_out_endpointAddr &
651 0x0f),
652 ucs->bulk_out_buffer, count,
653 gigaset_write_bulk_callback, cs);
654 ret = usb_submit_urb(ucs->bulk_out_urb, GFP_ATOMIC);
655 } else {
656 ret = -ENODEV;
657 }
658 spin_unlock_irqrestore(&cs->lock, flags);
659
660 if (ret) {
661 dev_err(cs->dev, "could not submit urb (error %d)\n", -ret);
662 ucs->busy = 0;
663 }
664
665 if (!bcs->tx_skb->len) {
666 /* skb sent completely */
667 gigaset_skb_sent(bcs, bcs->tx_skb);
668
669 gig_dbg(DEBUG_INTR, "kfree skb (Adr: %lx)!",
670 (unsigned long) bcs->tx_skb);
671 dev_kfree_skb_any(bcs->tx_skb);
672 bcs->tx_skb = NULL;
673 }
674
675 return ret;
676 }
677
678 static int gigaset_probe(struct usb_interface *interface,
679 const struct usb_device_id *id)
680 {
681 int retval;
682 struct usb_device *udev = interface_to_usbdev(interface);
683 struct usb_host_interface *hostif = interface->cur_altsetting;
684 struct cardstate *cs = NULL;
685 struct usb_cardstate *ucs = NULL;
686 struct usb_endpoint_descriptor *endpoint;
687 int buffer_size;
688
689 gig_dbg(DEBUG_ANY, "%s: Check if device matches ...", __func__);
690
691 /* See if the device offered us matches what we can accept */
692 if ((le16_to_cpu(udev->descriptor.idVendor) != USB_M105_VENDOR_ID) ||
693 (le16_to_cpu(udev->descriptor.idProduct) != USB_M105_PRODUCT_ID)) {
694 gig_dbg(DEBUG_ANY, "device ID (0x%x, 0x%x) not for me - skip",
695 le16_to_cpu(udev->descriptor.idVendor),
696 le16_to_cpu(udev->descriptor.idProduct));
697 return -ENODEV;
698 }
699 if (hostif->desc.bInterfaceNumber != 0) {
700 gig_dbg(DEBUG_ANY, "interface %d not for me - skip",
701 hostif->desc.bInterfaceNumber);
702 return -ENODEV;
703 }
704 if (hostif->desc.bAlternateSetting != 0) {
705 dev_notice(&udev->dev, "unsupported altsetting %d - skip",
706 hostif->desc.bAlternateSetting);
707 return -ENODEV;
708 }
709 if (hostif->desc.bInterfaceClass != 255) {
710 dev_notice(&udev->dev, "unsupported interface class %d - skip",
711 hostif->desc.bInterfaceClass);
712 return -ENODEV;
713 }
714
715 dev_info(&udev->dev, "%s: Device matched ... !\n", __func__);
716
717 /* allocate memory for our device state and intialize it */
718 cs = gigaset_initcs(driver, 1, 1, 0, cidmode, GIGASET_MODULENAME);
719 if (!cs)
720 return -ENODEV;
721 ucs = cs->hw.usb;
722
723 /* save off device structure ptrs for later use */
724 usb_get_dev(udev);
725 ucs->udev = udev;
726 ucs->interface = interface;
727 cs->dev = &interface->dev;
728
729 /* save address of controller structure */
730 usb_set_intfdata(interface, cs);
731
732 endpoint = &hostif->endpoint[0].desc;
733
734 buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
735 ucs->bulk_out_size = buffer_size;
736 ucs->bulk_out_endpointAddr = endpoint->bEndpointAddress;
737 ucs->bulk_out_buffer = kmalloc(buffer_size, GFP_KERNEL);
738 if (!ucs->bulk_out_buffer) {
739 dev_err(cs->dev, "Couldn't allocate bulk_out_buffer\n");
740 retval = -ENOMEM;
741 goto error;
742 }
743
744 ucs->bulk_out_urb = usb_alloc_urb(0, GFP_KERNEL);
745 if (!ucs->bulk_out_urb) {
746 dev_err(cs->dev, "Couldn't allocate bulk_out_urb\n");
747 retval = -ENOMEM;
748 goto error;
749 }
750
751 endpoint = &hostif->endpoint[1].desc;
752
753 ucs->busy = 0;
754
755 ucs->read_urb = usb_alloc_urb(0, GFP_KERNEL);
756 if (!ucs->read_urb) {
757 dev_err(cs->dev, "No free urbs available\n");
758 retval = -ENOMEM;
759 goto error;
760 }
761 buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
762 ucs->rcvbuf_size = buffer_size;
763 ucs->int_in_endpointAddr = endpoint->bEndpointAddress;
764 ucs->rcvbuf = kmalloc(buffer_size, GFP_KERNEL);
765 if (!ucs->rcvbuf) {
766 dev_err(cs->dev, "Couldn't allocate rcvbuf\n");
767 retval = -ENOMEM;
768 goto error;
769 }
770 /* Fill the interrupt urb and send it to the core */
771 usb_fill_int_urb(ucs->read_urb, udev,
772 usb_rcvintpipe(udev,
773 endpoint->bEndpointAddress & 0x0f),
774 ucs->rcvbuf, buffer_size,
775 gigaset_read_int_callback,
776 cs, endpoint->bInterval);
777
778 retval = usb_submit_urb(ucs->read_urb, GFP_KERNEL);
779 if (retval) {
780 dev_err(cs->dev, "Could not submit URB (error %d)\n", -retval);
781 goto error;
782 }
783
784 /* tell common part that the device is ready */
785 if (startmode == SM_LOCKED)
786 cs->mstate = MS_LOCKED;
787
788 if (!gigaset_start(cs)) {
789 tasklet_kill(&cs->write_tasklet);
790 retval = -ENODEV;
791 goto error;
792 }
793 return 0;
794
795 error:
796 usb_kill_urb(ucs->read_urb);
797 kfree(ucs->bulk_out_buffer);
798 usb_free_urb(ucs->bulk_out_urb);
799 kfree(ucs->rcvbuf);
800 usb_free_urb(ucs->read_urb);
801 usb_set_intfdata(interface, NULL);
802 ucs->read_urb = ucs->bulk_out_urb = NULL;
803 ucs->rcvbuf = ucs->bulk_out_buffer = NULL;
804 usb_put_dev(ucs->udev);
805 ucs->udev = NULL;
806 ucs->interface = NULL;
807 gigaset_freecs(cs);
808 return retval;
809 }
810
811 static void gigaset_disconnect(struct usb_interface *interface)
812 {
813 struct cardstate *cs;
814 struct usb_cardstate *ucs;
815
816 cs = usb_get_intfdata(interface);
817 ucs = cs->hw.usb;
818
819 dev_info(cs->dev, "disconnecting Gigaset USB adapter\n");
820
821 usb_kill_urb(ucs->read_urb);
822
823 gigaset_stop(cs);
824
825 usb_set_intfdata(interface, NULL);
826 tasklet_kill(&cs->write_tasklet);
827
828 usb_kill_urb(ucs->bulk_out_urb);
829
830 kfree(ucs->bulk_out_buffer);
831 usb_free_urb(ucs->bulk_out_urb);
832 kfree(ucs->rcvbuf);
833 usb_free_urb(ucs->read_urb);
834 ucs->read_urb = ucs->bulk_out_urb = NULL;
835 ucs->rcvbuf = ucs->bulk_out_buffer = NULL;
836
837 usb_put_dev(ucs->udev);
838 ucs->interface = NULL;
839 ucs->udev = NULL;
840 cs->dev = NULL;
841 gigaset_freecs(cs);
842 }
843
844 /* gigaset_suspend
845 * This function is called before the USB connection is suspended or reset.
846 */
847 static int gigaset_suspend(struct usb_interface *intf, pm_message_t message)
848 {
849 struct cardstate *cs = usb_get_intfdata(intf);
850
851 /* stop activity */
852 cs->connected = 0; /* prevent rescheduling */
853 usb_kill_urb(cs->hw.usb->read_urb);
854 tasklet_kill(&cs->write_tasklet);
855 usb_kill_urb(cs->hw.usb->bulk_out_urb);
856
857 gig_dbg(DEBUG_SUSPEND, "suspend complete");
858 return 0;
859 }
860
861 /* gigaset_resume
862 * This function is called after the USB connection has been resumed or reset.
863 */
864 static int gigaset_resume(struct usb_interface *intf)
865 {
866 struct cardstate *cs = usb_get_intfdata(intf);
867 int rc;
868
869 /* resubmit interrupt URB */
870 cs->connected = 1;
871 rc = usb_submit_urb(cs->hw.usb->read_urb, GFP_KERNEL);
872 if (rc) {
873 dev_err(cs->dev, "Could not submit read URB (error %d)\n", -rc);
874 return rc;
875 }
876
877 gig_dbg(DEBUG_SUSPEND, "resume complete");
878 return 0;
879 }
880
881 /* gigaset_pre_reset
882 * This function is called before the USB connection is reset.
883 */
884 static int gigaset_pre_reset(struct usb_interface *intf)
885 {
886 /* same as suspend */
887 return gigaset_suspend(intf, PMSG_ON);
888 }
889
890 static const struct gigaset_ops ops = {
891 gigaset_write_cmd,
892 gigaset_write_room,
893 gigaset_chars_in_buffer,
894 gigaset_brkchars,
895 gigaset_init_bchannel,
896 gigaset_close_bchannel,
897 gigaset_initbcshw,
898 gigaset_freebcshw,
899 gigaset_reinitbcshw,
900 gigaset_initcshw,
901 gigaset_freecshw,
902 gigaset_set_modem_ctrl,
903 gigaset_baud_rate,
904 gigaset_set_line_ctrl,
905 gigaset_m10x_send_skb,
906 gigaset_m10x_input,
907 };
908
909 /*
910 * This function is called while kernel-module is loaded
911 */
912 static int __init usb_gigaset_init(void)
913 {
914 int result;
915
916 /* allocate memory for our driver state and intialize it */
917 driver = gigaset_initdriver(GIGASET_MINOR, GIGASET_MINORS,
918 GIGASET_MODULENAME, GIGASET_DEVNAME,
919 &ops, THIS_MODULE);
920 if (driver == NULL)
921 goto error;
922
923 /* register this driver with the USB subsystem */
924 result = usb_register(&gigaset_usb_driver);
925 if (result < 0) {
926 pr_err("error %d registering USB driver\n", -result);
927 goto error;
928 }
929
930 pr_info(DRIVER_DESC "\n");
931 return 0;
932
933 error:
934 if (driver)
935 gigaset_freedriver(driver);
936 driver = NULL;
937 return -1;
938 }
939
940 /*
941 * This function is called while unloading the kernel-module
942 */
943 static void __exit usb_gigaset_exit(void)
944 {
945 int i;
946
947 gigaset_blockdriver(driver); /* => probe will fail
948 * => no gigaset_start any more
949 */
950
951 /* stop all connected devices */
952 for (i = 0; i < driver->minors; i++)
953 gigaset_shutdown(driver->cs + i);
954
955 /* from now on, no isdn callback should be possible */
956
957 /* deregister this driver with the USB subsystem */
958 usb_deregister(&gigaset_usb_driver);
959 /* this will call the disconnect-callback */
960 /* from now on, no disconnect/probe callback should be running */
961
962 gigaset_freedriver(driver);
963 driver = NULL;
964 }
965
966
967 module_init(usb_gigaset_init);
968 module_exit(usb_gigaset_exit);
969
970 MODULE_AUTHOR(DRIVER_AUTHOR);
971 MODULE_DESCRIPTION(DRIVER_DESC);
972
973 MODULE_LICENSE("GPL");