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[deliverable/linux.git] / drivers / isdn / gigaset / usb-gigaset.c
1 /*
2 * USB driver for Gigaset 307x directly or using M105 Data.
3 *
4 * Copyright (c) 2001 by Stefan Eilers
5 * and Hansjoerg Lipp <hjlipp@web.de>.
6 *
7 * This driver was derived from the USB skeleton driver by
8 * Greg Kroah-Hartman <greg@kroah.com>
9 *
10 * =====================================================================
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License as
13 * published by the Free Software Foundation; either version 2 of
14 * the License, or (at your option) any later version.
15 * =====================================================================
16 */
17
18 #include "gigaset.h"
19
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 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 struct usb_bc_state {};
142
143 static inline unsigned tiocm_to_gigaset(unsigned state)
144 {
145 return ((state & TIOCM_DTR) ? 1 : 0) | ((state & TIOCM_RTS) ? 2 : 0);
146 }
147
148 #ifdef CONFIG_GIGASET_UNDOCREQ
149 /* WARNING: EXPERIMENTAL! */
150 static int gigaset_set_modem_ctrl(struct cardstate *cs, unsigned old_state,
151 unsigned new_state)
152 {
153 struct usb_device *udev = cs->hw.usb->udev;
154 unsigned mask, val;
155 int r;
156
157 mask = tiocm_to_gigaset(old_state ^ new_state);
158 val = tiocm_to_gigaset(new_state);
159
160 gig_dbg(DEBUG_USBREQ, "set flags 0x%02x with mask 0x%02x", val, mask);
161 // don't use this in an interrupt/BH
162 r = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 7, 0x41,
163 (val & 0xff) | ((mask & 0xff) << 8), 0,
164 NULL, 0, 2000 /* timeout? */);
165 if (r < 0)
166 return r;
167 //..
168 return 0;
169 }
170
171 static int set_value(struct cardstate *cs, u8 req, u16 val)
172 {
173 struct usb_device *udev = cs->hw.usb->udev;
174 int r, r2;
175
176 gig_dbg(DEBUG_USBREQ, "request %02x (%04x)",
177 (unsigned)req, (unsigned)val);
178 r = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x12, 0x41,
179 0xf /*?*/, 0, NULL, 0, 2000 /*?*/);
180 /* no idea what this does */
181 if (r < 0) {
182 dev_err(&udev->dev, "error %d on request 0x12\n", -r);
183 return r;
184 }
185
186 r = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), req, 0x41,
187 val, 0, NULL, 0, 2000 /*?*/);
188 if (r < 0)
189 dev_err(&udev->dev, "error %d on request 0x%02x\n",
190 -r, (unsigned)req);
191
192 r2 = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x19, 0x41,
193 0, 0, cs->hw.usb->bchars, 6, 2000 /*?*/);
194 if (r2 < 0)
195 dev_err(&udev->dev, "error %d on request 0x19\n", -r2);
196
197 return r < 0 ? r : (r2 < 0 ? r2 : 0);
198 }
199
200 /* WARNING: HIGHLY EXPERIMENTAL! */
201 // don't use this in an interrupt/BH
202 static int gigaset_baud_rate(struct cardstate *cs, unsigned cflag)
203 {
204 u16 val;
205 u32 rate;
206
207 cflag &= CBAUD;
208
209 switch (cflag) {
210 //FIXME more values?
211 case B300: rate = 300; break;
212 case B600: rate = 600; break;
213 case B1200: rate = 1200; break;
214 case B2400: rate = 2400; break;
215 case B4800: rate = 4800; break;
216 case B9600: rate = 9600; break;
217 case B19200: rate = 19200; break;
218 case B38400: rate = 38400; break;
219 case B57600: rate = 57600; break;
220 case B115200: rate = 115200; break;
221 default:
222 rate = 9600;
223 dev_err(cs->dev, "unsupported baudrate request 0x%x,"
224 " using default of B9600\n", cflag);
225 }
226
227 val = 0x383fff / rate + 1;
228
229 return set_value(cs, 1, val);
230 }
231
232 /* WARNING: HIGHLY EXPERIMENTAL! */
233 // don't use this in an interrupt/BH
234 static int gigaset_set_line_ctrl(struct cardstate *cs, unsigned cflag)
235 {
236 u16 val = 0;
237
238 /* set the parity */
239 if (cflag & PARENB)
240 val |= (cflag & PARODD) ? 0x10 : 0x20;
241
242 /* set the number of data bits */
243 switch (cflag & CSIZE) {
244 case CS5:
245 val |= 5 << 8; break;
246 case CS6:
247 val |= 6 << 8; break;
248 case CS7:
249 val |= 7 << 8; break;
250 case CS8:
251 val |= 8 << 8; break;
252 default:
253 dev_err(cs->dev, "CSIZE was not CS5-CS8, using default of 8\n");
254 val |= 8 << 8;
255 break;
256 }
257
258 /* set the number of stop bits */
259 if (cflag & CSTOPB) {
260 if ((cflag & CSIZE) == CS5)
261 val |= 1; /* 1.5 stop bits */ //FIXME is this okay?
262 else
263 val |= 2; /* 2 stop bits */
264 }
265
266 return set_value(cs, 3, val);
267 }
268
269 #else
270 static int gigaset_set_modem_ctrl(struct cardstate *cs, unsigned old_state,
271 unsigned new_state)
272 {
273 return -EINVAL;
274 }
275
276 static int gigaset_set_line_ctrl(struct cardstate *cs, unsigned cflag)
277 {
278 return -EINVAL;
279 }
280
281 static int gigaset_baud_rate(struct cardstate *cs, unsigned cflag)
282 {
283 return -EINVAL;
284 }
285 #endif
286
287
288 /*================================================================================================================*/
289 static int gigaset_init_bchannel(struct bc_state *bcs)
290 {
291 /* nothing to do for M10x */
292 gigaset_bchannel_up(bcs);
293 return 0;
294 }
295
296 static int gigaset_close_bchannel(struct bc_state *bcs)
297 {
298 /* nothing to do for M10x */
299 gigaset_bchannel_down(bcs);
300 return 0;
301 }
302
303 static int write_modem(struct cardstate *cs);
304 static int send_cb(struct cardstate *cs, struct cmdbuf_t *cb);
305
306
307 /* Write tasklet handler: Continue sending current skb, or send command, or
308 * start sending an skb from the send queue.
309 */
310 static void gigaset_modem_fill(unsigned long data)
311 {
312 struct cardstate *cs = (struct cardstate *) data;
313 struct bc_state *bcs = &cs->bcs[0]; /* only one channel */
314 struct cmdbuf_t *cb;
315 unsigned long flags;
316 int again;
317
318 gig_dbg(DEBUG_OUTPUT, "modem_fill");
319
320 if (atomic_read(&cs->hw.usb->busy)) {
321 gig_dbg(DEBUG_OUTPUT, "modem_fill: busy");
322 return;
323 }
324
325 do {
326 again = 0;
327 if (!bcs->tx_skb) { /* no skb is being sent */
328 spin_lock_irqsave(&cs->cmdlock, flags);
329 cb = cs->cmdbuf;
330 spin_unlock_irqrestore(&cs->cmdlock, flags);
331 if (cb) { /* commands to send? */
332 gig_dbg(DEBUG_OUTPUT, "modem_fill: cb");
333 if (send_cb(cs, cb) < 0) {
334 gig_dbg(DEBUG_OUTPUT,
335 "modem_fill: send_cb failed");
336 again = 1; /* no callback will be
337 called! */
338 }
339 } else { /* skbs to send? */
340 bcs->tx_skb = skb_dequeue(&bcs->squeue);
341 if (bcs->tx_skb)
342 gig_dbg(DEBUG_INTR,
343 "Dequeued skb (Adr: %lx)!",
344 (unsigned long) bcs->tx_skb);
345 }
346 }
347
348 if (bcs->tx_skb) {
349 gig_dbg(DEBUG_OUTPUT, "modem_fill: tx_skb");
350 if (write_modem(cs) < 0) {
351 gig_dbg(DEBUG_OUTPUT,
352 "modem_fill: write_modem failed");
353 // FIXME should we tell the LL?
354 again = 1; /* no callback will be called! */
355 }
356 }
357 } while (again);
358 }
359
360 /**
361 * gigaset_read_int_callback
362 *
363 * It is called if the data was received from the device.
364 */
365 static void gigaset_read_int_callback(struct urb *urb, struct pt_regs *regs)
366 {
367 struct inbuf_t *inbuf = urb->context;
368 struct cardstate *cs = inbuf->cs;
369 int resubmit = 0;
370 int r;
371 unsigned numbytes;
372 unsigned char *src;
373 unsigned long flags;
374
375 if (!urb->status) {
376 if (!cs->connected) {
377 err("%s: disconnected", __func__); /* should never happen */
378 return;
379 }
380
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 resubmit = 1;
398 } else {
399 /* The urb might have been killed. */
400 gig_dbg(DEBUG_ANY, "%s - nonzero read bulk status received: %d",
401 __func__, urb->status);
402 if (urb->status != -ENOENT) { /* not killed */
403 if (!cs->connected) {
404 err("%s: disconnected", __func__); /* should never happen */
405 return;
406 }
407 resubmit = 1;
408 }
409 }
410
411 if (resubmit) {
412 spin_lock_irqsave(&cs->lock, flags);
413 r = cs->connected ? usb_submit_urb(urb, SLAB_ATOMIC) : -ENODEV;
414 spin_unlock_irqrestore(&cs->lock, flags);
415 if (r)
416 dev_err(cs->dev, "error %d when resubmitting urb.\n",
417 -r);
418 }
419 }
420
421
422 /* This callback routine is called when data was transmitted to the device. */
423 static void gigaset_write_bulk_callback(struct urb *urb, struct pt_regs *regs)
424 {
425 struct cardstate *cs = urb->context;
426 unsigned long flags;
427
428 if (urb->status)
429 dev_err(cs->dev, "bulk transfer failed (status %d)\n",
430 -urb->status);
431 /* That's all we can do. Communication problems
432 are handled by timeouts or network protocols. */
433
434 spin_lock_irqsave(&cs->lock, flags);
435 if (!cs->connected) {
436 err("%s: not connected", __func__);
437 } else {
438 atomic_set(&cs->hw.usb->busy, 0);
439 tasklet_schedule(&cs->write_tasklet);
440 }
441 spin_unlock_irqrestore(&cs->lock, flags);
442 }
443
444 static int send_cb(struct cardstate *cs, struct cmdbuf_t *cb)
445 {
446 struct cmdbuf_t *tcb;
447 unsigned long flags;
448 int count;
449 int status = -ENOENT; // FIXME
450 struct usb_cardstate *ucs = cs->hw.usb;
451
452 do {
453 if (!cb->len) {
454 tcb = cb;
455
456 spin_lock_irqsave(&cs->cmdlock, flags);
457 cs->cmdbytes -= cs->curlen;
458 gig_dbg(DEBUG_OUTPUT, "send_cb: sent %u bytes, %u left",
459 cs->curlen, cs->cmdbytes);
460 cs->cmdbuf = cb = cb->next;
461 if (cb) {
462 cb->prev = NULL;
463 cs->curlen = cb->len;
464 } else {
465 cs->lastcmdbuf = NULL;
466 cs->curlen = 0;
467 }
468 spin_unlock_irqrestore(&cs->cmdlock, flags);
469
470 if (tcb->wake_tasklet)
471 tasklet_schedule(tcb->wake_tasklet);
472 kfree(tcb);
473 }
474 if (cb) {
475 count = min(cb->len, ucs->bulk_out_size);
476 gig_dbg(DEBUG_OUTPUT, "send_cb: send %d bytes", count);
477
478 usb_fill_bulk_urb(ucs->bulk_out_urb, ucs->udev,
479 usb_sndbulkpipe(ucs->udev,
480 ucs->bulk_out_endpointAddr & 0x0f),
481 cb->buf + cb->offset, count,
482 gigaset_write_bulk_callback, cs);
483
484 cb->offset += count;
485 cb->len -= count;
486 atomic_set(&ucs->busy, 1);
487
488 spin_lock_irqsave(&cs->lock, flags);
489 status = cs->connected ? usb_submit_urb(ucs->bulk_out_urb, SLAB_ATOMIC) : -ENODEV;
490 spin_unlock_irqrestore(&cs->lock, flags);
491
492 if (status) {
493 atomic_set(&ucs->busy, 0);
494 err("could not submit urb (error %d)\n",
495 -status);
496 cb->len = 0; /* skip urb => remove cb+wakeup
497 in next loop cycle */
498 }
499 }
500 } while (cb && status); /* next command on error */
501
502 return status;
503 }
504
505 /* Send command to device. */
506 static int gigaset_write_cmd(struct cardstate *cs, const unsigned char *buf,
507 int len, struct tasklet_struct *wake_tasklet)
508 {
509 struct cmdbuf_t *cb;
510 unsigned long flags;
511
512 gigaset_dbg_buffer(atomic_read(&cs->mstate) != MS_LOCKED ?
513 DEBUG_TRANSCMD : DEBUG_LOCKCMD,
514 "CMD Transmit", len, buf);
515
516 if (len <= 0)
517 return 0;
518
519 if (!(cb = kmalloc(sizeof(struct cmdbuf_t) + len, GFP_ATOMIC))) {
520 dev_err(cs->dev, "%s: out of memory\n", __func__);
521 return -ENOMEM;
522 }
523
524 memcpy(cb->buf, buf, len);
525 cb->len = len;
526 cb->offset = 0;
527 cb->next = NULL;
528 cb->wake_tasklet = wake_tasklet;
529
530 spin_lock_irqsave(&cs->cmdlock, flags);
531 cb->prev = cs->lastcmdbuf;
532 if (cs->lastcmdbuf)
533 cs->lastcmdbuf->next = cb;
534 else {
535 cs->cmdbuf = cb;
536 cs->curlen = len;
537 }
538 cs->cmdbytes += len;
539 cs->lastcmdbuf = cb;
540 spin_unlock_irqrestore(&cs->cmdlock, flags);
541
542 spin_lock_irqsave(&cs->lock, flags);
543 if (cs->connected)
544 tasklet_schedule(&cs->write_tasklet);
545 spin_unlock_irqrestore(&cs->lock, flags);
546 return len;
547 }
548
549 static int gigaset_write_room(struct cardstate *cs)
550 {
551 unsigned long flags;
552 unsigned bytes;
553
554 spin_lock_irqsave(&cs->cmdlock, flags);
555 bytes = cs->cmdbytes;
556 spin_unlock_irqrestore(&cs->cmdlock, flags);
557
558 return bytes < IF_WRITEBUF ? IF_WRITEBUF - bytes : 0;
559 }
560
561 static int gigaset_chars_in_buffer(struct cardstate *cs)
562 {
563 return cs->cmdbytes;
564 }
565
566 static int gigaset_brkchars(struct cardstate *cs, const unsigned char buf[6])
567 {
568 #ifdef CONFIG_GIGASET_UNDOCREQ
569 struct usb_device *udev = cs->hw.usb->udev;
570
571 gigaset_dbg_buffer(DEBUG_USBREQ, "brkchars", 6, buf);
572 memcpy(cs->hw.usb->bchars, buf, 6);
573 return usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x19, 0x41,
574 0, 0, &buf, 6, 2000);
575 #else
576 return -EINVAL;
577 #endif
578 }
579
580 static int gigaset_freebcshw(struct bc_state *bcs)
581 {
582 if (!bcs->hw.usb)
583 return 0;
584 //FIXME
585 kfree(bcs->hw.usb);
586 return 1;
587 }
588
589 /* Initialize the b-channel structure */
590 static int gigaset_initbcshw(struct bc_state *bcs)
591 {
592 bcs->hw.usb = kmalloc(sizeof(struct usb_bc_state), GFP_KERNEL);
593 if (!bcs->hw.usb)
594 return 0;
595
596 return 1;
597 }
598
599 static void gigaset_reinitbcshw(struct bc_state *bcs)
600 {
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 return 0;
617
618 ucs->bchars[0] = 0;
619 ucs->bchars[1] = 0;
620 ucs->bchars[2] = 0;
621 ucs->bchars[3] = 0;
622 ucs->bchars[4] = 0x11;
623 ucs->bchars[5] = 0x13;
624 ucs->bulk_out_buffer = NULL;
625 ucs->bulk_out_urb = NULL;
626 //ucs->urb_cmd_out = NULL;
627 ucs->read_urb = NULL;
628 tasklet_init(&cs->write_tasklet,
629 &gigaset_modem_fill, (unsigned long) cs);
630
631 return 1;
632 }
633
634 /* Send data from current skb to the device. */
635 static int write_modem(struct cardstate *cs)
636 {
637 int ret = 0;
638 int count;
639 struct bc_state *bcs = &cs->bcs[0]; /* only one channel */
640 struct usb_cardstate *ucs = cs->hw.usb;
641 unsigned long flags;
642
643 gig_dbg(DEBUG_WRITE, "len: %d...", bcs->tx_skb->len);
644
645 if (!bcs->tx_skb->len) {
646 dev_kfree_skb_any(bcs->tx_skb);
647 bcs->tx_skb = NULL;
648 return -EINVAL;
649 }
650
651 /* Copy data to bulk out buffer and // FIXME copying not necessary
652 * transmit data
653 */
654 count = min(bcs->tx_skb->len, (unsigned) ucs->bulk_out_size);
655 memcpy(ucs->bulk_out_buffer, bcs->tx_skb->data, count);
656 skb_pull(bcs->tx_skb, count);
657 atomic_set(&ucs->busy, 1);
658 gig_dbg(DEBUG_OUTPUT, "write_modem: send %d bytes", count);
659
660 spin_lock_irqsave(&cs->lock, flags);
661 if (cs->connected) {
662 usb_fill_bulk_urb(ucs->bulk_out_urb, ucs->udev,
663 usb_sndbulkpipe(ucs->udev,
664 ucs->bulk_out_endpointAddr & 0x0f),
665 ucs->bulk_out_buffer, count,
666 gigaset_write_bulk_callback, cs);
667 ret = usb_submit_urb(ucs->bulk_out_urb, SLAB_ATOMIC);
668 } else {
669 ret = -ENODEV;
670 }
671 spin_unlock_irqrestore(&cs->lock, flags);
672
673 if (ret) {
674 err("could not submit urb (error %d)\n", -ret);
675 atomic_set(&ucs->busy, 0);
676 }
677
678 if (!bcs->tx_skb->len) {
679 /* skb sent completely */
680 gigaset_skb_sent(bcs, bcs->tx_skb); //FIXME also, when ret<0?
681
682 gig_dbg(DEBUG_INTR, "kfree skb (Adr: %lx)!",
683 (unsigned long) bcs->tx_skb);
684 dev_kfree_skb_any(bcs->tx_skb);
685 bcs->tx_skb = NULL;
686 }
687
688 return ret;
689 }
690
691 static int gigaset_probe(struct usb_interface *interface,
692 const struct usb_device_id *id)
693 {
694 int retval;
695 struct usb_device *udev = interface_to_usbdev(interface);
696 unsigned int ifnum;
697 struct usb_host_interface *hostif;
698 struct cardstate *cs = NULL;
699 struct usb_cardstate *ucs = NULL;
700 struct usb_endpoint_descriptor *endpoint;
701 int buffer_size;
702 int alt;
703
704 gig_dbg(DEBUG_ANY,
705 "%s: Check if device matches .. (Vendor: 0x%x, Product: 0x%x)",
706 __func__, le16_to_cpu(udev->descriptor.idVendor),
707 le16_to_cpu(udev->descriptor.idProduct));
708
709 retval = -ENODEV; //FIXME
710
711 /* See if the device offered us matches what we can accept */
712 if ((le16_to_cpu(udev->descriptor.idVendor) != USB_M105_VENDOR_ID) ||
713 (le16_to_cpu(udev->descriptor.idProduct) != USB_M105_PRODUCT_ID))
714 return -ENODEV;
715
716 /* this starts to become ascii art... */
717 hostif = interface->cur_altsetting;
718 alt = hostif->desc.bAlternateSetting;
719 ifnum = hostif->desc.bInterfaceNumber; // FIXME ?
720
721 if (alt != 0 || ifnum != 0) {
722 dev_warn(&udev->dev, "ifnum %d, alt %d\n", ifnum, alt);
723 return -ENODEV;
724 }
725
726 /* Reject application specific intefaces
727 *
728 */
729 if (hostif->desc.bInterfaceClass != 255) {
730 dev_info(&udev->dev,
731 "%s: Device matched but iface_desc[%d]->bInterfaceClass==%d!\n",
732 __func__, ifnum, hostif->desc.bInterfaceClass);
733 return -ENODEV;
734 }
735
736 dev_info(&udev->dev, "%s: Device matched ... !\n", __func__);
737
738 cs = gigaset_getunassignedcs(driver);
739 if (!cs) {
740 dev_warn(&udev->dev, "no free cardstate\n");
741 return -ENODEV;
742 }
743 ucs = cs->hw.usb;
744
745 /* save off device structure ptrs for later use */
746 usb_get_dev(udev);
747 ucs->udev = udev;
748 ucs->interface = interface;
749 cs->dev = &interface->dev;
750
751 /* save address of controller structure */
752 usb_set_intfdata(interface, cs); // dev_set_drvdata(&interface->dev, cs);
753
754 endpoint = &hostif->endpoint[0].desc;
755
756 buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
757 ucs->bulk_out_size = buffer_size;
758 ucs->bulk_out_endpointAddr = endpoint->bEndpointAddress;
759 ucs->bulk_out_buffer = kmalloc(buffer_size, GFP_KERNEL);
760 if (!ucs->bulk_out_buffer) {
761 dev_err(cs->dev, "Couldn't allocate bulk_out_buffer\n");
762 retval = -ENOMEM;
763 goto error;
764 }
765
766 ucs->bulk_out_urb = usb_alloc_urb(0, SLAB_KERNEL);
767 if (!ucs->bulk_out_urb) {
768 dev_err(cs->dev, "Couldn't allocate bulk_out_urb\n");
769 retval = -ENOMEM;
770 goto error;
771 }
772
773 endpoint = &hostif->endpoint[1].desc;
774
775 atomic_set(&ucs->busy, 0);
776
777 ucs->read_urb = usb_alloc_urb(0, SLAB_KERNEL);
778 if (!ucs->read_urb) {
779 dev_err(cs->dev, "No free urbs available\n");
780 retval = -ENOMEM;
781 goto error;
782 }
783 buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
784 ucs->rcvbuf_size = buffer_size;
785 ucs->int_in_endpointAddr = endpoint->bEndpointAddress;
786 cs->inbuf[0].rcvbuf = kmalloc(buffer_size, GFP_KERNEL);
787 if (!cs->inbuf[0].rcvbuf) {
788 dev_err(cs->dev, "Couldn't allocate rcvbuf\n");
789 retval = -ENOMEM;
790 goto error;
791 }
792 /* Fill the interrupt urb and send it to the core */
793 usb_fill_int_urb(ucs->read_urb, udev,
794 usb_rcvintpipe(udev,
795 endpoint->bEndpointAddress & 0x0f),
796 cs->inbuf[0].rcvbuf, buffer_size,
797 gigaset_read_int_callback,
798 cs->inbuf + 0, endpoint->bInterval);
799
800 retval = usb_submit_urb(ucs->read_urb, SLAB_KERNEL);
801 if (retval) {
802 dev_err(cs->dev, "Could not submit URB (error %d)\n", -retval);
803 goto error;
804 }
805
806 /* tell common part that the device is ready */
807 if (startmode == SM_LOCKED)
808 atomic_set(&cs->mstate, MS_LOCKED);
809
810 if (!gigaset_start(cs)) {
811 tasklet_kill(&cs->write_tasklet);
812 retval = -ENODEV; //FIXME
813 goto error;
814 }
815 return 0;
816
817 error:
818 if (ucs->read_urb)
819 usb_kill_urb(ucs->read_urb);
820 kfree(ucs->bulk_out_buffer);
821 if (ucs->bulk_out_urb != NULL)
822 usb_free_urb(ucs->bulk_out_urb);
823 kfree(cs->inbuf[0].rcvbuf);
824 if (ucs->read_urb != NULL)
825 usb_free_urb(ucs->read_urb);
826 usb_set_intfdata(interface, NULL);
827 ucs->read_urb = ucs->bulk_out_urb = NULL;
828 cs->inbuf[0].rcvbuf = ucs->bulk_out_buffer = NULL;
829 usb_put_dev(ucs->udev);
830 ucs->udev = NULL;
831 ucs->interface = NULL;
832 gigaset_unassign(cs);
833 return retval;
834 }
835
836 static void gigaset_disconnect(struct usb_interface *interface)
837 {
838 struct cardstate *cs;
839 struct usb_cardstate *ucs;
840
841 cs = usb_get_intfdata(interface);
842 ucs = cs->hw.usb;
843 usb_kill_urb(ucs->read_urb);
844
845 gigaset_stop(cs);
846
847 usb_set_intfdata(interface, NULL);
848 tasklet_kill(&cs->write_tasklet);
849
850 usb_kill_urb(ucs->bulk_out_urb); /* FIXME: only if active? */
851
852 kfree(ucs->bulk_out_buffer);
853 if (ucs->bulk_out_urb != NULL)
854 usb_free_urb(ucs->bulk_out_urb);
855 kfree(cs->inbuf[0].rcvbuf);
856 if (ucs->read_urb != NULL)
857 usb_free_urb(ucs->read_urb);
858 ucs->read_urb = ucs->bulk_out_urb = NULL;
859 cs->inbuf[0].rcvbuf = ucs->bulk_out_buffer = NULL;
860
861 usb_put_dev(ucs->udev);
862 ucs->interface = NULL;
863 ucs->udev = NULL;
864 cs->dev = NULL;
865 gigaset_unassign(cs);
866 }
867
868 static struct gigaset_ops ops = {
869 gigaset_write_cmd,
870 gigaset_write_room,
871 gigaset_chars_in_buffer,
872 gigaset_brkchars,
873 gigaset_init_bchannel,
874 gigaset_close_bchannel,
875 gigaset_initbcshw,
876 gigaset_freebcshw,
877 gigaset_reinitbcshw,
878 gigaset_initcshw,
879 gigaset_freecshw,
880 gigaset_set_modem_ctrl,
881 gigaset_baud_rate,
882 gigaset_set_line_ctrl,
883 gigaset_m10x_send_skb,
884 gigaset_m10x_input,
885 };
886
887 /**
888 * usb_gigaset_init
889 * This function is called while kernel-module is loaded
890 */
891 static int __init usb_gigaset_init(void)
892 {
893 int result;
894
895 /* allocate memory for our driver state and intialize it */
896 if ((driver = gigaset_initdriver(GIGASET_MINOR, GIGASET_MINORS,
897 GIGASET_MODULENAME, GIGASET_DEVNAME,
898 &ops, THIS_MODULE)) == NULL)
899 goto error;
900
901 /* allocate memory for our device state and intialize it */
902 cardstate = gigaset_initcs(driver, 1, 1, 0, cidmode, GIGASET_MODULENAME);
903 if (!cardstate)
904 goto error;
905
906 /* register this driver with the USB subsystem */
907 result = usb_register(&gigaset_usb_driver);
908 if (result < 0) {
909 err("usb_gigaset: usb_register failed (error %d)",
910 -result);
911 goto error;
912 }
913
914 info(DRIVER_AUTHOR);
915 info(DRIVER_DESC);
916 return 0;
917
918 error: if (cardstate)
919 gigaset_freecs(cardstate);
920 cardstate = NULL;
921 if (driver)
922 gigaset_freedriver(driver);
923 driver = NULL;
924 return -1;
925 }
926
927
928 /**
929 * usb_gigaset_exit
930 * This function is called while unloading the kernel-module
931 */
932 static void __exit usb_gigaset_exit(void)
933 {
934 gigaset_blockdriver(driver); /* => probe will fail
935 * => no gigaset_start any more
936 */
937
938 gigaset_shutdown(cardstate);
939 /* from now on, no isdn callback should be possible */
940
941 /* deregister this driver with the USB subsystem */
942 usb_deregister(&gigaset_usb_driver);
943 /* this will call the disconnect-callback */
944 /* from now on, no disconnect/probe callback should be running */
945
946 gigaset_freecs(cardstate);
947 cardstate = NULL;
948 gigaset_freedriver(driver);
949 driver = NULL;
950 }
951
952
953 module_init(usb_gigaset_init);
954 module_exit(usb_gigaset_exit);
955
956 MODULE_AUTHOR(DRIVER_AUTHOR);
957 MODULE_DESCRIPTION(DRIVER_DESC);
958
959 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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