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gigaset: clean up urb->status usage
[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
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 //FIXME // WAKEUP_CHARS: 256
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 need
101 * 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 static int gigaset_probe(struct usb_interface *interface,
108 const struct usb_device_id *id);
109 static void gigaset_disconnect(struct usb_interface *interface);
110
111 static struct gigaset_driver *driver = NULL;
112 static struct cardstate *cardstate = NULL;
113
114 /* usb specific object needed to register this driver with the usb subsystem */
115 static struct usb_driver gigaset_usb_driver = {
116 .name = GIGASET_MODULENAME,
117 .probe = gigaset_probe,
118 .disconnect = gigaset_disconnect,
119 .id_table = gigaset_table,
120 };
121
122 struct usb_cardstate {
123 struct usb_device *udev; /* usb device pointer */
124 struct usb_interface *interface; /* interface for this device */
125 atomic_t busy; /* bulk output in progress */
126
127 /* Output buffer */
128 unsigned char *bulk_out_buffer;
129 int bulk_out_size;
130 __u8 bulk_out_endpointAddr;
131 struct urb *bulk_out_urb;
132
133 /* Input buffer */
134 int rcvbuf_size;
135 struct urb *read_urb;
136 __u8 int_in_endpointAddr;
137
138 char bchars[6]; /* for request 0x19 */
139 };
140
141 static inline unsigned tiocm_to_gigaset(unsigned state)
142 {
143 return ((state & TIOCM_DTR) ? 1 : 0) | ((state & TIOCM_RTS) ? 2 : 0);
144 }
145
146 #ifdef CONFIG_GIGASET_UNDOCREQ
147 /* WARNING: EXPERIMENTAL! */
148 static int gigaset_set_modem_ctrl(struct cardstate *cs, unsigned old_state,
149 unsigned new_state)
150 {
151 struct usb_device *udev = cs->hw.usb->udev;
152 unsigned mask, val;
153 int r;
154
155 mask = tiocm_to_gigaset(old_state ^ new_state);
156 val = tiocm_to_gigaset(new_state);
157
158 gig_dbg(DEBUG_USBREQ, "set flags 0x%02x with mask 0x%02x", val, mask);
159 // don't use this in an interrupt/BH
160 r = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 7, 0x41,
161 (val & 0xff) | ((mask & 0xff) << 8), 0,
162 NULL, 0, 2000 /* timeout? */);
163 if (r < 0)
164 return r;
165 //..
166 return 0;
167 }
168
169 static int set_value(struct cardstate *cs, u8 req, u16 val)
170 {
171 struct usb_device *udev = cs->hw.usb->udev;
172 int r, r2;
173
174 gig_dbg(DEBUG_USBREQ, "request %02x (%04x)",
175 (unsigned)req, (unsigned)val);
176 r = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x12, 0x41,
177 0xf /*?*/, 0, NULL, 0, 2000 /*?*/);
178 /* no idea what this does */
179 if (r < 0) {
180 dev_err(&udev->dev, "error %d on request 0x12\n", -r);
181 return r;
182 }
183
184 r = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), req, 0x41,
185 val, 0, NULL, 0, 2000 /*?*/);
186 if (r < 0)
187 dev_err(&udev->dev, "error %d on request 0x%02x\n",
188 -r, (unsigned)req);
189
190 r2 = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x19, 0x41,
191 0, 0, cs->hw.usb->bchars, 6, 2000 /*?*/);
192 if (r2 < 0)
193 dev_err(&udev->dev, "error %d on request 0x19\n", -r2);
194
195 return r < 0 ? r : (r2 < 0 ? r2 : 0);
196 }
197
198 /* WARNING: HIGHLY EXPERIMENTAL! */
199 // don't use this in an interrupt/BH
200 static int gigaset_baud_rate(struct cardstate *cs, unsigned cflag)
201 {
202 u16 val;
203 u32 rate;
204
205 cflag &= CBAUD;
206
207 switch (cflag) {
208 //FIXME more values?
209 case B300: rate = 300; break;
210 case B600: rate = 600; break;
211 case B1200: rate = 1200; break;
212 case B2400: rate = 2400; break;
213 case B4800: rate = 4800; break;
214 case B9600: rate = 9600; break;
215 case B19200: rate = 19200; break;
216 case B38400: rate = 38400; break;
217 case B57600: rate = 57600; break;
218 case B115200: rate = 115200; break;
219 default:
220 rate = 9600;
221 dev_err(cs->dev, "unsupported baudrate request 0x%x,"
222 " using default of B9600\n", cflag);
223 }
224
225 val = 0x383fff / rate + 1;
226
227 return set_value(cs, 1, val);
228 }
229
230 /* WARNING: HIGHLY EXPERIMENTAL! */
231 // don't use this in an interrupt/BH
232 static int gigaset_set_line_ctrl(struct cardstate *cs, unsigned cflag)
233 {
234 u16 val = 0;
235
236 /* set the parity */
237 if (cflag & PARENB)
238 val |= (cflag & PARODD) ? 0x10 : 0x20;
239
240 /* set the number of data bits */
241 switch (cflag & CSIZE) {
242 case CS5:
243 val |= 5 << 8; break;
244 case CS6:
245 val |= 6 << 8; break;
246 case CS7:
247 val |= 7 << 8; break;
248 case CS8:
249 val |= 8 << 8; break;
250 default:
251 dev_err(cs->dev, "CSIZE was not CS5-CS8, using default of 8\n");
252 val |= 8 << 8;
253 break;
254 }
255
256 /* set the number of stop bits */
257 if (cflag & CSTOPB) {
258 if ((cflag & CSIZE) == CS5)
259 val |= 1; /* 1.5 stop bits */ //FIXME is this okay?
260 else
261 val |= 2; /* 2 stop bits */
262 }
263
264 return set_value(cs, 3, val);
265 }
266
267 #else
268 static int gigaset_set_modem_ctrl(struct cardstate *cs, unsigned old_state,
269 unsigned new_state)
270 {
271 return -EINVAL;
272 }
273
274 static int gigaset_set_line_ctrl(struct cardstate *cs, unsigned cflag)
275 {
276 return -EINVAL;
277 }
278
279 static int gigaset_baud_rate(struct cardstate *cs, unsigned cflag)
280 {
281 return -EINVAL;
282 }
283 #endif
284
285
286 /*================================================================================================================*/
287 static int gigaset_init_bchannel(struct bc_state *bcs)
288 {
289 /* nothing to do for M10x */
290 gigaset_bchannel_up(bcs);
291 return 0;
292 }
293
294 static int gigaset_close_bchannel(struct bc_state *bcs)
295 {
296 /* nothing to do for M10x */
297 gigaset_bchannel_down(bcs);
298 return 0;
299 }
300
301 static int write_modem(struct cardstate *cs);
302 static int send_cb(struct cardstate *cs, struct cmdbuf_t *cb);
303
304
305 /* Write tasklet handler: Continue sending current skb, or send command, or
306 * start sending an skb from the send queue.
307 */
308 static void gigaset_modem_fill(unsigned long data)
309 {
310 struct cardstate *cs = (struct cardstate *) data;
311 struct bc_state *bcs = &cs->bcs[0]; /* only one channel */
312 struct cmdbuf_t *cb;
313 int again;
314
315 gig_dbg(DEBUG_OUTPUT, "modem_fill");
316
317 if (atomic_read(&cs->hw.usb->busy)) {
318 gig_dbg(DEBUG_OUTPUT, "modem_fill: busy");
319 return;
320 }
321
322 do {
323 again = 0;
324 if (!bcs->tx_skb) { /* no skb is being sent */
325 cb = cs->cmdbuf;
326 if (cb) { /* commands to send? */
327 gig_dbg(DEBUG_OUTPUT, "modem_fill: cb");
328 if (send_cb(cs, cb) < 0) {
329 gig_dbg(DEBUG_OUTPUT,
330 "modem_fill: send_cb failed");
331 again = 1; /* no callback will be
332 called! */
333 }
334 } else { /* skbs to send? */
335 bcs->tx_skb = skb_dequeue(&bcs->squeue);
336 if (bcs->tx_skb)
337 gig_dbg(DEBUG_INTR,
338 "Dequeued skb (Adr: %lx)!",
339 (unsigned long) bcs->tx_skb);
340 }
341 }
342
343 if (bcs->tx_skb) {
344 gig_dbg(DEBUG_OUTPUT, "modem_fill: tx_skb");
345 if (write_modem(cs) < 0) {
346 gig_dbg(DEBUG_OUTPUT,
347 "modem_fill: write_modem failed");
348 // FIXME should we tell the LL?
349 again = 1; /* no callback will be called! */
350 }
351 }
352 } while (again);
353 }
354
355 /**
356 * gigaset_read_int_callback
357 *
358 * It is called if the data was received from the device.
359 */
360 static void gigaset_read_int_callback(struct urb *urb)
361 {
362 struct inbuf_t *inbuf = urb->context;
363 struct cardstate *cs = inbuf->cs;
364 int status = urb->status;
365 int resubmit = 0;
366 int r;
367 unsigned numbytes;
368 unsigned char *src;
369 unsigned long flags;
370
371 if (!status) {
372 if (!cs->connected) {
373 err("%s: disconnected", __func__); /* should never happen */
374 return;
375 }
376
377 numbytes = urb->actual_length;
378
379 if (numbytes) {
380 src = inbuf->rcvbuf;
381 if (unlikely(*src))
382 dev_warn(cs->dev,
383 "%s: There was no leading 0, but 0x%02x!\n",
384 __func__, (unsigned) *src);
385 ++src; /* skip leading 0x00 */
386 --numbytes;
387 if (gigaset_fill_inbuf(inbuf, src, numbytes)) {
388 gig_dbg(DEBUG_INTR, "%s-->BH", __func__);
389 gigaset_schedule_event(inbuf->cs);
390 }
391 } else
392 gig_dbg(DEBUG_INTR, "Received zero block length");
393 resubmit = 1;
394 } else {
395 /* The urb might have been killed. */
396 gig_dbg(DEBUG_ANY, "%s - nonzero read bulk status received: %d",
397 __func__, status);
398 if (status != -ENOENT) { /* not killed */
399 if (!cs->connected) {
400 err("%s: disconnected", __func__); /* should never happen */
401 return;
402 }
403 resubmit = 1;
404 }
405 }
406
407 if (resubmit) {
408 spin_lock_irqsave(&cs->lock, flags);
409 r = cs->connected ? usb_submit_urb(urb, GFP_ATOMIC) : -ENODEV;
410 spin_unlock_irqrestore(&cs->lock, flags);
411 if (r)
412 dev_err(cs->dev, "error %d when resubmitting urb.\n",
413 -r);
414 }
415 }
416
417
418 /* This callback routine is called when data was transmitted to the device. */
419 static void gigaset_write_bulk_callback(struct urb *urb)
420 {
421 struct cardstate *cs = urb->context;
422 int status = urb->status;
423 unsigned long flags;
424
425 if (status)
426 dev_err(cs->dev, "bulk transfer failed (status %d)\n",
427 -status);
428 /* That's all we can do. Communication problems
429 are handled by timeouts or network protocols. */
430
431 spin_lock_irqsave(&cs->lock, flags);
432 if (!cs->connected) {
433 err("%s: not connected", __func__);
434 } else {
435 atomic_set(&cs->hw.usb->busy, 0);
436 tasklet_schedule(&cs->write_tasklet);
437 }
438 spin_unlock_irqrestore(&cs->lock, flags);
439 }
440
441 static int send_cb(struct cardstate *cs, struct cmdbuf_t *cb)
442 {
443 struct cmdbuf_t *tcb;
444 unsigned long flags;
445 int count;
446 int status = -ENOENT; // FIXME
447 struct usb_cardstate *ucs = cs->hw.usb;
448
449 do {
450 if (!cb->len) {
451 tcb = cb;
452
453 spin_lock_irqsave(&cs->cmdlock, flags);
454 cs->cmdbytes -= cs->curlen;
455 gig_dbg(DEBUG_OUTPUT, "send_cb: sent %u bytes, %u left",
456 cs->curlen, cs->cmdbytes);
457 cs->cmdbuf = cb = cb->next;
458 if (cb) {
459 cb->prev = NULL;
460 cs->curlen = cb->len;
461 } else {
462 cs->lastcmdbuf = NULL;
463 cs->curlen = 0;
464 }
465 spin_unlock_irqrestore(&cs->cmdlock, flags);
466
467 if (tcb->wake_tasklet)
468 tasklet_schedule(tcb->wake_tasklet);
469 kfree(tcb);
470 }
471 if (cb) {
472 count = min(cb->len, ucs->bulk_out_size);
473 gig_dbg(DEBUG_OUTPUT, "send_cb: send %d bytes", count);
474
475 usb_fill_bulk_urb(ucs->bulk_out_urb, ucs->udev,
476 usb_sndbulkpipe(ucs->udev,
477 ucs->bulk_out_endpointAddr & 0x0f),
478 cb->buf + cb->offset, count,
479 gigaset_write_bulk_callback, cs);
480
481 cb->offset += count;
482 cb->len -= count;
483 atomic_set(&ucs->busy, 1);
484
485 spin_lock_irqsave(&cs->lock, flags);
486 status = cs->connected ? usb_submit_urb(ucs->bulk_out_urb, GFP_ATOMIC) : -ENODEV;
487 spin_unlock_irqrestore(&cs->lock, flags);
488
489 if (status) {
490 atomic_set(&ucs->busy, 0);
491 err("could not submit urb (error %d)\n",
492 -status);
493 cb->len = 0; /* skip urb => remove cb+wakeup
494 in next loop cycle */
495 }
496 }
497 } while (cb && status); /* next command on error */
498
499 return status;
500 }
501
502 /* Send command to device. */
503 static int gigaset_write_cmd(struct cardstate *cs, const unsigned char *buf,
504 int len, struct tasklet_struct *wake_tasklet)
505 {
506 struct cmdbuf_t *cb;
507 unsigned long flags;
508
509 gigaset_dbg_buffer(atomic_read(&cs->mstate) != MS_LOCKED ?
510 DEBUG_TRANSCMD : DEBUG_LOCKCMD,
511 "CMD Transmit", len, buf);
512
513 if (len <= 0)
514 return 0;
515
516 if (!(cb = kmalloc(sizeof(struct cmdbuf_t) + len, GFP_ATOMIC))) {
517 dev_err(cs->dev, "%s: out of memory\n", __func__);
518 return -ENOMEM;
519 }
520
521 memcpy(cb->buf, buf, len);
522 cb->len = len;
523 cb->offset = 0;
524 cb->next = NULL;
525 cb->wake_tasklet = wake_tasklet;
526
527 spin_lock_irqsave(&cs->cmdlock, flags);
528 cb->prev = cs->lastcmdbuf;
529 if (cs->lastcmdbuf)
530 cs->lastcmdbuf->next = cb;
531 else {
532 cs->cmdbuf = cb;
533 cs->curlen = len;
534 }
535 cs->cmdbytes += len;
536 cs->lastcmdbuf = cb;
537 spin_unlock_irqrestore(&cs->cmdlock, flags);
538
539 spin_lock_irqsave(&cs->lock, flags);
540 if (cs->connected)
541 tasklet_schedule(&cs->write_tasklet);
542 spin_unlock_irqrestore(&cs->lock, flags);
543 return len;
544 }
545
546 static int gigaset_write_room(struct cardstate *cs)
547 {
548 unsigned bytes;
549
550 bytes = cs->cmdbytes;
551 return bytes < IF_WRITEBUF ? IF_WRITEBUF - bytes : 0;
552 }
553
554 static int gigaset_chars_in_buffer(struct cardstate *cs)
555 {
556 return cs->cmdbytes;
557 }
558
559 static int gigaset_brkchars(struct cardstate *cs, const unsigned char buf[6])
560 {
561 #ifdef CONFIG_GIGASET_UNDOCREQ
562 struct usb_device *udev = cs->hw.usb->udev;
563
564 gigaset_dbg_buffer(DEBUG_USBREQ, "brkchars", 6, buf);
565 memcpy(cs->hw.usb->bchars, buf, 6);
566 return usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x19, 0x41,
567 0, 0, &buf, 6, 2000);
568 #else
569 return -EINVAL;
570 #endif
571 }
572
573 static int gigaset_freebcshw(struct bc_state *bcs)
574 {
575 /* unused */
576 return 1;
577 }
578
579 /* Initialize the b-channel structure */
580 static int gigaset_initbcshw(struct bc_state *bcs)
581 {
582 /* unused */
583 bcs->hw.usb = NULL;
584 return 1;
585 }
586
587 static void gigaset_reinitbcshw(struct bc_state *bcs)
588 {
589 /* nothing to do for M10x */
590 }
591
592 static void gigaset_freecshw(struct cardstate *cs)
593 {
594 tasklet_kill(&cs->write_tasklet);
595 kfree(cs->hw.usb);
596 }
597
598 static int gigaset_initcshw(struct cardstate *cs)
599 {
600 struct usb_cardstate *ucs;
601
602 cs->hw.usb = ucs =
603 kmalloc(sizeof(struct usb_cardstate), GFP_KERNEL);
604 if (!ucs)
605 return 0;
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->urb_cmd_out = NULL;
616 ucs->read_urb = NULL;
617 tasklet_init(&cs->write_tasklet,
618 &gigaset_modem_fill, (unsigned long) cs);
619
620 return 1;
621 }
622
623 /* Send data from current skb to the device. */
624 static int write_modem(struct cardstate *cs)
625 {
626 int ret = 0;
627 int count;
628 struct bc_state *bcs = &cs->bcs[0]; /* only one channel */
629 struct usb_cardstate *ucs = cs->hw.usb;
630 unsigned long flags;
631
632 gig_dbg(DEBUG_WRITE, "len: %d...", bcs->tx_skb->len);
633
634 if (!bcs->tx_skb->len) {
635 dev_kfree_skb_any(bcs->tx_skb);
636 bcs->tx_skb = NULL;
637 return -EINVAL;
638 }
639
640 /* Copy data to bulk out buffer and // FIXME copying not necessary
641 * transmit data
642 */
643 count = min(bcs->tx_skb->len, (unsigned) ucs->bulk_out_size);
644 skb_copy_from_linear_data(bcs->tx_skb, ucs->bulk_out_buffer, count);
645 skb_pull(bcs->tx_skb, count);
646 atomic_set(&ucs->busy, 1);
647 gig_dbg(DEBUG_OUTPUT, "write_modem: send %d bytes", count);
648
649 spin_lock_irqsave(&cs->lock, flags);
650 if (cs->connected) {
651 usb_fill_bulk_urb(ucs->bulk_out_urb, ucs->udev,
652 usb_sndbulkpipe(ucs->udev,
653 ucs->bulk_out_endpointAddr & 0x0f),
654 ucs->bulk_out_buffer, count,
655 gigaset_write_bulk_callback, cs);
656 ret = usb_submit_urb(ucs->bulk_out_urb, GFP_ATOMIC);
657 } else {
658 ret = -ENODEV;
659 }
660 spin_unlock_irqrestore(&cs->lock, flags);
661
662 if (ret) {
663 err("could not submit urb (error %d)\n", -ret);
664 atomic_set(&ucs->busy, 0);
665 }
666
667 if (!bcs->tx_skb->len) {
668 /* skb sent completely */
669 gigaset_skb_sent(bcs, bcs->tx_skb); //FIXME also, when ret<0?
670
671 gig_dbg(DEBUG_INTR, "kfree skb (Adr: %lx)!",
672 (unsigned long) bcs->tx_skb);
673 dev_kfree_skb_any(bcs->tx_skb);
674 bcs->tx_skb = NULL;
675 }
676
677 return ret;
678 }
679
680 static int gigaset_probe(struct usb_interface *interface,
681 const struct usb_device_id *id)
682 {
683 int retval;
684 struct usb_device *udev = interface_to_usbdev(interface);
685 unsigned int ifnum;
686 struct usb_host_interface *hostif;
687 struct cardstate *cs = NULL;
688 struct usb_cardstate *ucs = NULL;
689 struct usb_endpoint_descriptor *endpoint;
690 int buffer_size;
691 int alt;
692
693 gig_dbg(DEBUG_ANY,
694 "%s: Check if device matches .. (Vendor: 0x%x, Product: 0x%x)",
695 __func__, le16_to_cpu(udev->descriptor.idVendor),
696 le16_to_cpu(udev->descriptor.idProduct));
697
698 retval = -ENODEV; //FIXME
699
700 /* See if the device offered us matches what we can accept */
701 if ((le16_to_cpu(udev->descriptor.idVendor) != USB_M105_VENDOR_ID) ||
702 (le16_to_cpu(udev->descriptor.idProduct) != USB_M105_PRODUCT_ID))
703 return -ENODEV;
704
705 /* this starts to become ascii art... */
706 hostif = interface->cur_altsetting;
707 alt = hostif->desc.bAlternateSetting;
708 ifnum = hostif->desc.bInterfaceNumber; // FIXME ?
709
710 if (alt != 0 || ifnum != 0) {
711 dev_warn(&udev->dev, "ifnum %d, alt %d\n", ifnum, alt);
712 return -ENODEV;
713 }
714
715 /* Reject application specific intefaces
716 *
717 */
718 if (hostif->desc.bInterfaceClass != 255) {
719 dev_info(&udev->dev,
720 "%s: Device matched but iface_desc[%d]->bInterfaceClass==%d!\n",
721 __func__, ifnum, hostif->desc.bInterfaceClass);
722 return -ENODEV;
723 }
724
725 dev_info(&udev->dev, "%s: Device matched ... !\n", __func__);
726
727 cs = gigaset_getunassignedcs(driver);
728 if (!cs) {
729 dev_warn(&udev->dev, "no free cardstate\n");
730 return -ENODEV;
731 }
732 ucs = cs->hw.usb;
733
734 /* save off device structure ptrs for later use */
735 usb_get_dev(udev);
736 ucs->udev = udev;
737 ucs->interface = interface;
738 cs->dev = &interface->dev;
739
740 /* save address of controller structure */
741 usb_set_intfdata(interface, cs); // dev_set_drvdata(&interface->dev, cs);
742
743 endpoint = &hostif->endpoint[0].desc;
744
745 buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
746 ucs->bulk_out_size = buffer_size;
747 ucs->bulk_out_endpointAddr = endpoint->bEndpointAddress;
748 ucs->bulk_out_buffer = kmalloc(buffer_size, GFP_KERNEL);
749 if (!ucs->bulk_out_buffer) {
750 dev_err(cs->dev, "Couldn't allocate bulk_out_buffer\n");
751 retval = -ENOMEM;
752 goto error;
753 }
754
755 ucs->bulk_out_urb = usb_alloc_urb(0, GFP_KERNEL);
756 if (!ucs->bulk_out_urb) {
757 dev_err(cs->dev, "Couldn't allocate bulk_out_urb\n");
758 retval = -ENOMEM;
759 goto error;
760 }
761
762 endpoint = &hostif->endpoint[1].desc;
763
764 atomic_set(&ucs->busy, 0);
765
766 ucs->read_urb = usb_alloc_urb(0, GFP_KERNEL);
767 if (!ucs->read_urb) {
768 dev_err(cs->dev, "No free urbs available\n");
769 retval = -ENOMEM;
770 goto error;
771 }
772 buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
773 ucs->rcvbuf_size = buffer_size;
774 ucs->int_in_endpointAddr = endpoint->bEndpointAddress;
775 cs->inbuf[0].rcvbuf = kmalloc(buffer_size, GFP_KERNEL);
776 if (!cs->inbuf[0].rcvbuf) {
777 dev_err(cs->dev, "Couldn't allocate rcvbuf\n");
778 retval = -ENOMEM;
779 goto error;
780 }
781 /* Fill the interrupt urb and send it to the core */
782 usb_fill_int_urb(ucs->read_urb, udev,
783 usb_rcvintpipe(udev,
784 endpoint->bEndpointAddress & 0x0f),
785 cs->inbuf[0].rcvbuf, buffer_size,
786 gigaset_read_int_callback,
787 cs->inbuf + 0, endpoint->bInterval);
788
789 retval = usb_submit_urb(ucs->read_urb, GFP_KERNEL);
790 if (retval) {
791 dev_err(cs->dev, "Could not submit URB (error %d)\n", -retval);
792 goto error;
793 }
794
795 /* tell common part that the device is ready */
796 if (startmode == SM_LOCKED)
797 atomic_set(&cs->mstate, MS_LOCKED);
798
799 if (!gigaset_start(cs)) {
800 tasklet_kill(&cs->write_tasklet);
801 retval = -ENODEV; //FIXME
802 goto error;
803 }
804 return 0;
805
806 error:
807 usb_kill_urb(ucs->read_urb);
808 kfree(ucs->bulk_out_buffer);
809 usb_free_urb(ucs->bulk_out_urb);
810 kfree(cs->inbuf[0].rcvbuf);
811 usb_free_urb(ucs->read_urb);
812 usb_set_intfdata(interface, NULL);
813 ucs->read_urb = ucs->bulk_out_urb = NULL;
814 cs->inbuf[0].rcvbuf = ucs->bulk_out_buffer = NULL;
815 usb_put_dev(ucs->udev);
816 ucs->udev = NULL;
817 ucs->interface = NULL;
818 gigaset_unassign(cs);
819 return retval;
820 }
821
822 static void gigaset_disconnect(struct usb_interface *interface)
823 {
824 struct cardstate *cs;
825 struct usb_cardstate *ucs;
826
827 cs = usb_get_intfdata(interface);
828 ucs = cs->hw.usb;
829 usb_kill_urb(ucs->read_urb);
830
831 gigaset_stop(cs);
832
833 usb_set_intfdata(interface, NULL);
834 tasklet_kill(&cs->write_tasklet);
835
836 usb_kill_urb(ucs->bulk_out_urb); /* FIXME: only if active? */
837
838 kfree(ucs->bulk_out_buffer);
839 usb_free_urb(ucs->bulk_out_urb);
840 kfree(cs->inbuf[0].rcvbuf);
841 usb_free_urb(ucs->read_urb);
842 ucs->read_urb = ucs->bulk_out_urb = NULL;
843 cs->inbuf[0].rcvbuf = ucs->bulk_out_buffer = NULL;
844
845 usb_put_dev(ucs->udev);
846 ucs->interface = NULL;
847 ucs->udev = NULL;
848 cs->dev = NULL;
849 gigaset_unassign(cs);
850 }
851
852 static const struct gigaset_ops ops = {
853 gigaset_write_cmd,
854 gigaset_write_room,
855 gigaset_chars_in_buffer,
856 gigaset_brkchars,
857 gigaset_init_bchannel,
858 gigaset_close_bchannel,
859 gigaset_initbcshw,
860 gigaset_freebcshw,
861 gigaset_reinitbcshw,
862 gigaset_initcshw,
863 gigaset_freecshw,
864 gigaset_set_modem_ctrl,
865 gigaset_baud_rate,
866 gigaset_set_line_ctrl,
867 gigaset_m10x_send_skb,
868 gigaset_m10x_input,
869 };
870
871 /**
872 * usb_gigaset_init
873 * This function is called while kernel-module is loaded
874 */
875 static int __init usb_gigaset_init(void)
876 {
877 int result;
878
879 /* allocate memory for our driver state and intialize it */
880 if ((driver = gigaset_initdriver(GIGASET_MINOR, GIGASET_MINORS,
881 GIGASET_MODULENAME, GIGASET_DEVNAME,
882 &ops, THIS_MODULE)) == NULL)
883 goto error;
884
885 /* allocate memory for our device state and intialize it */
886 cardstate = gigaset_initcs(driver, 1, 1, 0, cidmode, GIGASET_MODULENAME);
887 if (!cardstate)
888 goto error;
889
890 /* register this driver with the USB subsystem */
891 result = usb_register(&gigaset_usb_driver);
892 if (result < 0) {
893 err("usb_gigaset: usb_register failed (error %d)",
894 -result);
895 goto error;
896 }
897
898 info(DRIVER_AUTHOR);
899 info(DRIVER_DESC);
900 return 0;
901
902 error: if (cardstate)
903 gigaset_freecs(cardstate);
904 cardstate = NULL;
905 if (driver)
906 gigaset_freedriver(driver);
907 driver = NULL;
908 return -1;
909 }
910
911
912 /**
913 * usb_gigaset_exit
914 * This function is called while unloading the kernel-module
915 */
916 static void __exit usb_gigaset_exit(void)
917 {
918 gigaset_blockdriver(driver); /* => probe will fail
919 * => no gigaset_start any more
920 */
921
922 gigaset_shutdown(cardstate);
923 /* from now on, no isdn callback should be possible */
924
925 /* deregister this driver with the USB subsystem */
926 usb_deregister(&gigaset_usb_driver);
927 /* this will call the disconnect-callback */
928 /* from now on, no disconnect/probe callback should be running */
929
930 gigaset_freecs(cardstate);
931 cardstate = NULL;
932 gigaset_freedriver(driver);
933 driver = NULL;
934 }
935
936
937 module_init(usb_gigaset_init);
938 module_exit(usb_gigaset_exit);
939
940 MODULE_AUTHOR(DRIVER_AUTHOR);
941 MODULE_DESCRIPTION(DRIVER_DESC);
942
943 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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