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added 2.6.29.6 aldebaran kernel
[nao-ulib.git] / kernel / 2.6.29.6-aldebaran-rt / drivers / isdn / gigaset / usb-gigaset.c
blobfba61f6705278250139bc2ac94e51f2409b025f5
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 /* 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 = NULL;
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 int rcvbuf_size;
145 struct urb *read_urb;
146 __u8 int_in_endpointAddr;
147
148 char bchars[6]; /* for request 0x19 */
149 };
150
151 static inline unsigned tiocm_to_gigaset(unsigned state)
152 {
153 return ((state & TIOCM_DTR) ? 1 : 0) | ((state & TIOCM_RTS) ? 2 : 0);
154 }
155
156 #ifdef CONFIG_GIGASET_UNDOCREQ
157 /* WARNING: EXPERIMENTAL! */
158 static int gigaset_set_modem_ctrl(struct cardstate *cs, unsigned old_state,
159 unsigned new_state)
160 {
161 struct usb_device *udev = cs->hw.usb->udev;
162 unsigned mask, val;
163 int r;
164
165 mask = tiocm_to_gigaset(old_state ^ new_state);
166 val = tiocm_to_gigaset(new_state);
167
168 gig_dbg(DEBUG_USBREQ, "set flags 0x%02x with mask 0x%02x", val, mask);
169 // don't use this in an interrupt/BH
170 r = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 7, 0x41,
171 (val & 0xff) | ((mask & 0xff) << 8), 0,
172 NULL, 0, 2000 /* timeout? */);
173 if (r < 0)
174 return r;
175 //..
176 return 0;
177 }
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 /* WARNING: HIGHLY EXPERIMENTAL! */
209 // don't use this in an interrupt/BH
210 static int gigaset_baud_rate(struct cardstate *cs, unsigned cflag)
211 {
212 u16 val;
213 u32 rate;
214
215 cflag &= CBAUD;
216
217 switch (cflag) {
218 //FIXME more values?
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 /* WARNING: HIGHLY EXPERIMENTAL! */
241 // don't use this in an interrupt/BH
242 static int gigaset_set_line_ctrl(struct cardstate *cs, unsigned cflag)
243 {
244 u16 val = 0;
245
246 /* set the parity */
247 if (cflag & PARENB)
248 val |= (cflag & PARODD) ? 0x10 : 0x20;
249
250 /* set the number of data bits */
251 switch (cflag & CSIZE) {
252 case CS5:
253 val |= 5 << 8; break;
254 case CS6:
255 val |= 6 << 8; break;
256 case CS7:
257 val |= 7 << 8; break;
258 case CS8:
259 val |= 8 << 8; break;
260 default:
261 dev_err(cs->dev, "CSIZE was not CS5-CS8, using default of 8\n");
262 val |= 8 << 8;
263 break;
264 }
265
266 /* set the number of stop bits */
267 if (cflag & CSTOPB) {
268 if ((cflag & CSIZE) == CS5)
269 val |= 1; /* 1.5 stop bits */ //FIXME is this okay?
270 else
271 val |= 2; /* 2 stop bits */
272 }
273
274 return set_value(cs, 3, val);
275 }
276
277 #else
278 static int gigaset_set_modem_ctrl(struct cardstate *cs, unsigned old_state,
279 unsigned new_state)
280 {
281 return -EINVAL;
282 }
283
284 static int gigaset_set_line_ctrl(struct cardstate *cs, unsigned cflag)
285 {
286 return -EINVAL;
287 }
288
289 static int gigaset_baud_rate(struct cardstate *cs, unsigned cflag)
290 {
291 return -EINVAL;
292 }
293 #endif
294
295
296 /*================================================================================================================*/
297 static int gigaset_init_bchannel(struct bc_state *bcs)
298 {
299 /* nothing to do for M10x */
300 gigaset_bchannel_up(bcs);
301 return 0;
302 }
303
304 static int gigaset_close_bchannel(struct bc_state *bcs)
305 {
306 /* nothing to do for M10x */
307 gigaset_bchannel_down(bcs);
308 return 0;
309 }
310
311 static int write_modem(struct cardstate *cs);
312 static int send_cb(struct cardstate *cs, struct cmdbuf_t *cb);
313
314
315 /* Write tasklet handler: Continue sending current skb, or send command, or
316 * start sending an skb from the send queue.
317 */
318 static void gigaset_modem_fill(unsigned long data)
319 {
320 struct cardstate *cs = (struct cardstate *) data;
321 struct bc_state *bcs = &cs->bcs[0]; /* only one channel */
322 struct cmdbuf_t *cb;
323 int again;
324
325 gig_dbg(DEBUG_OUTPUT, "modem_fill");
326
327 if (cs->hw.usb->busy) {
328 gig_dbg(DEBUG_OUTPUT, "modem_fill: busy");
329 return;
330 }
331
332 do {
333 again = 0;
334 if (!bcs->tx_skb) { /* no skb is being sent */
335 cb = cs->cmdbuf;
336 if (cb) { /* commands to send? */
337 gig_dbg(DEBUG_OUTPUT, "modem_fill: cb");
338 if (send_cb(cs, cb) < 0) {
339 gig_dbg(DEBUG_OUTPUT,
340 "modem_fill: send_cb failed");
341 again = 1; /* no callback will be
342 called! */
343 }
344 } else { /* skbs to send? */
345 bcs->tx_skb = skb_dequeue(&bcs->squeue);
346 if (bcs->tx_skb)
347 gig_dbg(DEBUG_INTR,
348 "Dequeued skb (Adr: %lx)!",
349 (unsigned long) bcs->tx_skb);
350 }
351 }
352
353 if (bcs->tx_skb) {
354 gig_dbg(DEBUG_OUTPUT, "modem_fill: tx_skb");
355 if (write_modem(cs) < 0) {
356 gig_dbg(DEBUG_OUTPUT,
357 "modem_fill: write_modem failed");
358 // FIXME should we tell the LL?
359 again = 1; /* no callback will be called! */
360 }
361 }
362 } while (again);
363 }
364
365 /**
366 * gigaset_read_int_callback
367 *
368 * It is called if the data was received from the device.
369 */
370 static void gigaset_read_int_callback(struct urb *urb)
371 {
372 struct inbuf_t *inbuf = urb->context;
373 struct cardstate *cs = inbuf->cs;
374 int status = urb->status;
375 int r;
376 unsigned numbytes;
377 unsigned char *src;
378 unsigned long flags;
379
380 if (!status) {
381 numbytes = urb->actual_length;
382
383 if (numbytes) {
384 src = inbuf->rcvbuf;
385 if (unlikely(*src))
386 dev_warn(cs->dev,
387 "%s: There was no leading 0, but 0x%02x!\n",
388 __func__, (unsigned) *src);
389 ++src; /* skip leading 0x00 */
390 --numbytes;
391 if (gigaset_fill_inbuf(inbuf, src, numbytes)) {
392 gig_dbg(DEBUG_INTR, "%s-->BH", __func__);
393 gigaset_schedule_event(inbuf->cs);
394 }
395 } else
396 gig_dbg(DEBUG_INTR, "Received zero block length");
397 } else {
398 /* The urb might have been killed. */
399 gig_dbg(DEBUG_ANY, "%s - nonzero status received: %d",
400 __func__, status);
401 if (status == -ENOENT || status == -ESHUTDOWN)
402 /* killed or endpoint shutdown: don't resubmit */
403 return;
404 }
405
406 /* resubmit URB */
407 spin_lock_irqsave(&cs->lock, flags);
408 if (!cs->connected) {
409 spin_unlock_irqrestore(&cs->lock, flags);
410 pr_err("%s: disconnected\n", __func__);
411 return;
412 }
413 r = usb_submit_urb(urb, GFP_ATOMIC);
414 spin_unlock_irqrestore(&cs->lock, flags);
415 if (r)
416 dev_err(cs->dev, "error %d resubmitting URB\n", -r);
417 }
418
419
420 /* This callback routine is called when data was transmitted to the device. */
421 static void gigaset_write_bulk_callback(struct urb *urb)
422 {
423 struct cardstate *cs = urb->context;
424 int status = urb->status;
425 unsigned long flags;
426
427 switch (status) {
428 case 0: /* normal completion */
429 break;
430 case -ENOENT: /* killed */
431 gig_dbg(DEBUG_ANY, "%s: killed", __func__);
432 cs->hw.usb->busy = 0;
433 return;
434 default:
435 dev_err(cs->dev, "bulk transfer failed (status %d)\n",
436 -status);
437 /* That's all we can do. Communication problems
438 are handled by timeouts or network protocols. */
439 }
440
441 spin_lock_irqsave(&cs->lock, flags);
442 if (!cs->connected) {
443 pr_err("%s: disconnected\n", __func__);
444 } else {
445 cs->hw.usb->busy = 0;
446 tasklet_schedule(&cs->write_tasklet);
447 }
448 spin_unlock_irqrestore(&cs->lock, flags);
449 }
450
451 static int send_cb(struct cardstate *cs, struct cmdbuf_t *cb)
452 {
453 struct cmdbuf_t *tcb;
454 unsigned long flags;
455 int count;
456 int status = -ENOENT; // FIXME
457 struct usb_cardstate *ucs = cs->hw.usb;
458
459 do {
460 if (!cb->len) {
461 tcb = cb;
462
463 spin_lock_irqsave(&cs->cmdlock, flags);
464 cs->cmdbytes -= cs->curlen;
465 gig_dbg(DEBUG_OUTPUT, "send_cb: sent %u bytes, %u left",
466 cs->curlen, cs->cmdbytes);
467 cs->cmdbuf = cb = cb->next;
468 if (cb) {
469 cb->prev = NULL;
470 cs->curlen = cb->len;
471 } else {
472 cs->lastcmdbuf = NULL;
473 cs->curlen = 0;
474 }
475 spin_unlock_irqrestore(&cs->cmdlock, flags);
476
477 if (tcb->wake_tasklet)
478 tasklet_schedule(tcb->wake_tasklet);
479 kfree(tcb);
480 }
481 if (cb) {
482 count = min(cb->len, ucs->bulk_out_size);
483 gig_dbg(DEBUG_OUTPUT, "send_cb: send %d bytes", count);
484
485 usb_fill_bulk_urb(ucs->bulk_out_urb, ucs->udev,
486 usb_sndbulkpipe(ucs->udev,
487 ucs->bulk_out_endpointAddr & 0x0f),
488 cb->buf + cb->offset, count,
489 gigaset_write_bulk_callback, cs);
490
491 cb->offset += count;
492 cb->len -= count;
493 ucs->busy = 1;
494
495 spin_lock_irqsave(&cs->lock, flags);
496 status = cs->connected ? usb_submit_urb(ucs->bulk_out_urb, GFP_ATOMIC) : -ENODEV;
497 spin_unlock_irqrestore(&cs->lock, flags);
498
499 if (status) {
500 ucs->busy = 0;
501 dev_err(cs->dev,
502 "could not submit urb (error %d)\n",
503 -status);
504 cb->len = 0; /* skip urb => remove cb+wakeup
505 in next loop cycle */
506 }
507 }
508 } while (cb && status); /* next command on error */
509
510 return status;
511 }
512
513 /* Send command to device. */
514 static int gigaset_write_cmd(struct cardstate *cs, const unsigned char *buf,
515 int len, struct tasklet_struct *wake_tasklet)
516 {
517 struct cmdbuf_t *cb;
518 unsigned long flags;
519
520 gigaset_dbg_buffer(cs->mstate != MS_LOCKED ?
521 DEBUG_TRANSCMD : DEBUG_LOCKCMD,
522 "CMD Transmit", len, buf);
523
524 if (len <= 0)
525 return 0;
526
527 if (!(cb = kmalloc(sizeof(struct cmdbuf_t) + len, GFP_ATOMIC))) {
528 dev_err(cs->dev, "%s: out of memory\n", __func__);
529 return -ENOMEM;
530 }
531
532 memcpy(cb->buf, buf, len);
533 cb->len = len;
534 cb->offset = 0;
535 cb->next = NULL;
536 cb->wake_tasklet = wake_tasklet;
537
538 spin_lock_irqsave(&cs->cmdlock, flags);
539 cb->prev = cs->lastcmdbuf;
540 if (cs->lastcmdbuf)
541 cs->lastcmdbuf->next = cb;
542 else {
543 cs->cmdbuf = cb;
544 cs->curlen = len;
545 }
546 cs->cmdbytes += len;
547 cs->lastcmdbuf = cb;
548 spin_unlock_irqrestore(&cs->cmdlock, flags);
549
550 spin_lock_irqsave(&cs->lock, flags);
551 if (cs->connected)
552 tasklet_schedule(&cs->write_tasklet);
553 spin_unlock_irqrestore(&cs->lock, flags);
554 return len;
555 }
556
557 static int gigaset_write_room(struct cardstate *cs)
558 {
559 unsigned bytes;
560
561 bytes = cs->cmdbytes;
562 return bytes < IF_WRITEBUF ? IF_WRITEBUF - bytes : 0;
563 }
564
565 static int gigaset_chars_in_buffer(struct cardstate *cs)
566 {
567 return cs->cmdbytes;
568 }
569
570 static int gigaset_brkchars(struct cardstate *cs, const unsigned char buf[6])
571 {
572 #ifdef CONFIG_GIGASET_UNDOCREQ
573 struct usb_device *udev = cs->hw.usb->udev;
574
575 gigaset_dbg_buffer(DEBUG_USBREQ, "brkchars", 6, buf);
576 memcpy(cs->hw.usb->bchars, buf, 6);
577 return usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x19, 0x41,
578 0, 0, &buf, 6, 2000);
579 #else
580 return -EINVAL;
581 #endif
582 }
583
584 static int gigaset_freebcshw(struct bc_state *bcs)
585 {
586 /* unused */
587 return 1;
588 }
589
590 /* Initialize the b-channel structure */
591 static int gigaset_initbcshw(struct bc_state *bcs)
592 {
593 /* unused */
594 bcs->hw.usb = NULL;
595 return 1;
596 }
597
598 static void gigaset_reinitbcshw(struct bc_state *bcs)
599 {
600 /* nothing to do for M10x */
601 }
602
603 static void gigaset_freecshw(struct cardstate *cs)
604 {
605 tasklet_kill(&cs->write_tasklet);
606 kfree(cs->hw.usb);
607 }
608
609 static int gigaset_initcshw(struct cardstate *cs)
610 {
611 struct usb_cardstate *ucs;
612
613 cs->hw.usb = ucs =
614 kmalloc(sizeof(struct usb_cardstate), GFP_KERNEL);
615 if (!ucs) {
616 pr_err("out of memory\n");
617 return 0;
618 }
619
620 ucs->bchars[0] = 0;
621 ucs->bchars[1] = 0;
622 ucs->bchars[2] = 0;
623 ucs->bchars[3] = 0;
624 ucs->bchars[4] = 0x11;
625 ucs->bchars[5] = 0x13;
626 ucs->bulk_out_buffer = NULL;
627 ucs->bulk_out_urb = NULL;
628 //ucs->urb_cmd_out = NULL;
629 ucs->read_urb = NULL;
630 tasklet_init(&cs->write_tasklet,
631 &gigaset_modem_fill, (unsigned long) cs);
632
633 return 1;
634 }
635
636 /* Send data from current skb to the device. */
637 static int write_modem(struct cardstate *cs)
638 {
639 int ret = 0;
640 int count;
641 struct bc_state *bcs = &cs->bcs[0]; /* only one channel */
642 struct usb_cardstate *ucs = cs->hw.usb;
643 unsigned long flags;
644
645 gig_dbg(DEBUG_WRITE, "len: %d...", bcs->tx_skb->len);
646
647 if (!bcs->tx_skb->len) {
648 dev_kfree_skb_any(bcs->tx_skb);
649 bcs->tx_skb = NULL;
650 return -EINVAL;
651 }
652
653 /* Copy data to bulk out buffer and // FIXME copying not necessary
654 * transmit data
655 */
656 count = min(bcs->tx_skb->len, (unsigned) ucs->bulk_out_size);
657 skb_copy_from_linear_data(bcs->tx_skb, ucs->bulk_out_buffer, count);
658 skb_pull(bcs->tx_skb, count);
659 ucs->busy = 1;
660 gig_dbg(DEBUG_OUTPUT, "write_modem: send %d bytes", count);
661
662 spin_lock_irqsave(&cs->lock, flags);
663 if (cs->connected) {
664 usb_fill_bulk_urb(ucs->bulk_out_urb, ucs->udev,
665 usb_sndbulkpipe(ucs->udev,
666 ucs->bulk_out_endpointAddr & 0x0f),
667 ucs->bulk_out_buffer, count,
668 gigaset_write_bulk_callback, cs);
669 ret = usb_submit_urb(ucs->bulk_out_urb, GFP_ATOMIC);
670 } else {
671 ret = -ENODEV;
672 }
673 spin_unlock_irqrestore(&cs->lock, flags);
674
675 if (ret) {
676 dev_err(cs->dev, "could not submit urb (error %d)\n", -ret);
677 ucs->busy = 0;
678 }
679
680 if (!bcs->tx_skb->len) {
681 /* skb sent completely */
682 gigaset_skb_sent(bcs, bcs->tx_skb); //FIXME also, when ret<0?
683
684 gig_dbg(DEBUG_INTR, "kfree skb (Adr: %lx)!",
685 (unsigned long) bcs->tx_skb);
686 dev_kfree_skb_any(bcs->tx_skb);
687 bcs->tx_skb = NULL;
688 }
689
690 return ret;
691 }
692
693 static int gigaset_probe(struct usb_interface *interface,
694 const struct usb_device_id *id)
695 {
696 int retval;
697 struct usb_device *udev = interface_to_usbdev(interface);
698 struct usb_host_interface *hostif = interface->cur_altsetting;
699 struct cardstate *cs = NULL;
700 struct usb_cardstate *ucs = NULL;
701 struct usb_endpoint_descriptor *endpoint;
702 int buffer_size;
703
704 gig_dbg(DEBUG_ANY, "%s: Check if device matches ...", __func__);
705
706 /* See if the device offered us matches what we can accept */
707 if ((le16_to_cpu(udev->descriptor.idVendor) != USB_M105_VENDOR_ID) ||
708 (le16_to_cpu(udev->descriptor.idProduct) != USB_M105_PRODUCT_ID)) {
709 gig_dbg(DEBUG_ANY, "device ID (0x%x, 0x%x) not for me - skip",
710 le16_to_cpu(udev->descriptor.idVendor),
711 le16_to_cpu(udev->descriptor.idProduct));
712 return -ENODEV;
713 }
714 if (hostif->desc.bInterfaceNumber != 0) {
715 gig_dbg(DEBUG_ANY, "interface %d not for me - skip",
716 hostif->desc.bInterfaceNumber);
717 return -ENODEV;
718 }
719 if (hostif->desc.bAlternateSetting != 0) {
720 dev_notice(&udev->dev, "unsupported altsetting %d - skip",
721 hostif->desc.bAlternateSetting);
722 return -ENODEV;
723 }
724 if (hostif->desc.bInterfaceClass != 255) {
725 dev_notice(&udev->dev, "unsupported interface class %d - skip",
726 hostif->desc.bInterfaceClass);
727 return -ENODEV;
728 }
729
730 dev_info(&udev->dev, "%s: Device matched ... !\n", __func__);
731
732 /* allocate memory for our device state and intialize it */
733 cs = gigaset_initcs(driver, 1, 1, 0, cidmode, GIGASET_MODULENAME);
734 if (!cs)
735 return -ENODEV;
736 ucs = cs->hw.usb;
737
738 /* save off device structure ptrs for later use */
739 usb_get_dev(udev);
740 ucs->udev = udev;
741 ucs->interface = interface;
742 cs->dev = &interface->dev;
743
744 /* save address of controller structure */
745 usb_set_intfdata(interface, cs); // dev_set_drvdata(&interface->dev, cs);
746
747 endpoint = &hostif->endpoint[0].desc;
748
749 buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
750 ucs->bulk_out_size = buffer_size;
751 ucs->bulk_out_endpointAddr = endpoint->bEndpointAddress;
752 ucs->bulk_out_buffer = kmalloc(buffer_size, GFP_KERNEL);
753 if (!ucs->bulk_out_buffer) {
754 dev_err(cs->dev, "Couldn't allocate bulk_out_buffer\n");
755 retval = -ENOMEM;
756 goto error;
757 }
758
759 ucs->bulk_out_urb = usb_alloc_urb(0, GFP_KERNEL);
760 if (!ucs->bulk_out_urb) {
761 dev_err(cs->dev, "Couldn't allocate bulk_out_urb\n");
762 retval = -ENOMEM;
763 goto error;
764 }
765
766 endpoint = &hostif->endpoint[1].desc;
767
768 ucs->busy = 0;
769
770 ucs->read_urb = usb_alloc_urb(0, GFP_KERNEL);
771 if (!ucs->read_urb) {
772 dev_err(cs->dev, "No free urbs available\n");
773 retval = -ENOMEM;
774 goto error;
775 }
776 buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
777 ucs->rcvbuf_size = buffer_size;
778 ucs->int_in_endpointAddr = endpoint->bEndpointAddress;
779 cs->inbuf[0].rcvbuf = kmalloc(buffer_size, GFP_KERNEL);
780 if (!cs->inbuf[0].rcvbuf) {
781 dev_err(cs->dev, "Couldn't allocate rcvbuf\n");
782 retval = -ENOMEM;
783 goto error;
784 }
785 /* Fill the interrupt urb and send it to the core */
786 usb_fill_int_urb(ucs->read_urb, udev,
787 usb_rcvintpipe(udev,
788 endpoint->bEndpointAddress & 0x0f),
789 cs->inbuf[0].rcvbuf, buffer_size,
790 gigaset_read_int_callback,
791 cs->inbuf + 0, endpoint->bInterval);
792
793 retval = usb_submit_urb(ucs->read_urb, GFP_KERNEL);
794 if (retval) {
795 dev_err(cs->dev, "Could not submit URB (error %d)\n", -retval);
796 goto error;
797 }
798
799 /* tell common part that the device is ready */
800 if (startmode == SM_LOCKED)
801 cs->mstate = MS_LOCKED;
802
803 if (!gigaset_start(cs)) {
804 tasklet_kill(&cs->write_tasklet);
805 retval = -ENODEV; //FIXME
806 goto error;
807 }
808 return 0;
809
810 error:
811 usb_kill_urb(ucs->read_urb);
812 kfree(ucs->bulk_out_buffer);
813 usb_free_urb(ucs->bulk_out_urb);
814 kfree(cs->inbuf[0].rcvbuf);
815 usb_free_urb(ucs->read_urb);
816 usb_set_intfdata(interface, NULL);
817 ucs->read_urb = ucs->bulk_out_urb = NULL;
818 cs->inbuf[0].rcvbuf = ucs->bulk_out_buffer = NULL;
819 usb_put_dev(ucs->udev);
820 ucs->udev = NULL;
821 ucs->interface = NULL;
822 gigaset_freecs(cs);
823 return retval;
824 }
825
826 static void gigaset_disconnect(struct usb_interface *interface)
827 {
828 struct cardstate *cs;
829 struct usb_cardstate *ucs;
830
831 cs = usb_get_intfdata(interface);
832 ucs = cs->hw.usb;
833
834 dev_info(cs->dev, "disconnecting Gigaset USB adapter\n");
835
836 usb_kill_urb(ucs->read_urb);
837
838 gigaset_stop(cs);
839
840 usb_set_intfdata(interface, NULL);
841 tasklet_kill(&cs->write_tasklet);
842
843 usb_kill_urb(ucs->bulk_out_urb);
844
845 kfree(ucs->bulk_out_buffer);
846 usb_free_urb(ucs->bulk_out_urb);
847 kfree(cs->inbuf[0].rcvbuf);
848 usb_free_urb(ucs->read_urb);
849 ucs->read_urb = ucs->bulk_out_urb = NULL;
850 cs->inbuf[0].rcvbuf = ucs->bulk_out_buffer = NULL;
851
852 usb_put_dev(ucs->udev);
853 ucs->interface = NULL;
854 ucs->udev = NULL;
855 cs->dev = NULL;
856 gigaset_freecs(cs);
857 }
858
859 /* gigaset_suspend
860 * This function is called before the USB connection is suspended or reset.
861 */
862 static int gigaset_suspend(struct usb_interface *intf, pm_message_t message)
863 {
864 struct cardstate *cs = usb_get_intfdata(intf);
865
866 /* stop activity */
867 cs->connected = 0; /* prevent rescheduling */
868 usb_kill_urb(cs->hw.usb->read_urb);
869 tasklet_kill(&cs->write_tasklet);
870 usb_kill_urb(cs->hw.usb->bulk_out_urb);
871
872 gig_dbg(DEBUG_SUSPEND, "suspend complete");
873 return 0;
874 }
875
876 /* gigaset_resume
877 * This function is called after the USB connection has been resumed or reset.
878 */
879 static int gigaset_resume(struct usb_interface *intf)
880 {
881 struct cardstate *cs = usb_get_intfdata(intf);
882 int rc;
883
884 /* resubmit interrupt URB */
885 cs->connected = 1;
886 rc = usb_submit_urb(cs->hw.usb->read_urb, GFP_KERNEL);
887 if (rc) {
888 dev_err(cs->dev, "Could not submit read URB (error %d)\n", -rc);
889 return rc;
890 }
891
892 gig_dbg(DEBUG_SUSPEND, "resume complete");
893 return 0;
894 }
895
896 /* gigaset_pre_reset
897 * This function is called before the USB connection is reset.
898 */
899 static int gigaset_pre_reset(struct usb_interface *intf)
900 {
901 /* same as suspend */
902 return gigaset_suspend(intf, PMSG_ON);
903 }
904
905 static const struct gigaset_ops ops = {
906 gigaset_write_cmd,
907 gigaset_write_room,
908 gigaset_chars_in_buffer,
909 gigaset_brkchars,
910 gigaset_init_bchannel,
911 gigaset_close_bchannel,
912 gigaset_initbcshw,
913 gigaset_freebcshw,
914 gigaset_reinitbcshw,
915 gigaset_initcshw,
916 gigaset_freecshw,
917 gigaset_set_modem_ctrl,
918 gigaset_baud_rate,
919 gigaset_set_line_ctrl,
920 gigaset_m10x_send_skb,
921 gigaset_m10x_input,
922 };
923
924 /**
925 * usb_gigaset_init
926 * This function is called while kernel-module is loaded
927 */
928 static int __init usb_gigaset_init(void)
929 {
930 int result;
931
932 /* allocate memory for our driver state and intialize it */
933 if ((driver = gigaset_initdriver(GIGASET_MINOR, GIGASET_MINORS,
934 GIGASET_MODULENAME, GIGASET_DEVNAME,
935 &ops, THIS_MODULE)) == NULL)
936 goto error;
937
938 /* register this driver with the USB subsystem */
939 result = usb_register(&gigaset_usb_driver);
940 if (result < 0) {
941 pr_err("error %d registering USB driver\n", -result);
942 goto error;
943 }
944
945 pr_info(DRIVER_DESC "\n");
946 return 0;
947
948 error:
949 if (driver)
950 gigaset_freedriver(driver);
951 driver = NULL;
952 return -1;
953 }
954
955
956 /**
957 * usb_gigaset_exit
958 * This function is called while unloading the kernel-module
959 */
960 static void __exit usb_gigaset_exit(void)
961 {
962 int i;
963
964 gigaset_blockdriver(driver); /* => probe will fail
965 * => no gigaset_start any more
966 */
967
968 /* stop all connected devices */
969 for (i = 0; i < driver->minors; i++)
970 gigaset_shutdown(driver->cs + i);
971
972 /* from now on, no isdn callback should be possible */
973
974 /* deregister this driver with the USB subsystem */
975 usb_deregister(&gigaset_usb_driver);
976 /* this will call the disconnect-callback */
977 /* from now on, no disconnect/probe callback should be running */
978
979 gigaset_freedriver(driver);
980 driver = NULL;
981 }
982
983
984 module_init(usb_gigaset_init);
985 module_exit(usb_gigaset_exit);
986
987 MODULE_AUTHOR(DRIVER_AUTHOR);
988 MODULE_DESCRIPTION(DRIVER_DESC);
989
990 MODULE_LICENSE("GPL");
Nao low-level kernelspace/userspace library that runs on our robots, Nao-Team HTWK