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