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