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pid namespaces: allow signalling cgroup-init
[linux-2.6/mini2440.git] / drivers / isdn / gigaset / usb-gigaset.c
blobca4bee173cfb05e5857dffa3c9763ec559a803b6
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 resubmit = 0;
365 int r;
366 unsigned numbytes;
367 unsigned char *src;
368 unsigned long flags;
369
370 if (!urb->status) {
371 if (!cs->connected) {
372 err("%s: disconnected", __func__); /* should never happen */
373 return;
374 }
375
376 numbytes = urb->actual_length;
377
378 if (numbytes) {
379 src = inbuf->rcvbuf;
380 if (unlikely(*src))
381 dev_warn(cs->dev,
382 "%s: There was no leading 0, but 0x%02x!\n",
383 __func__, (unsigned) *src);
384 ++src; /* skip leading 0x00 */
385 --numbytes;
386 if (gigaset_fill_inbuf(inbuf, src, numbytes)) {
387 gig_dbg(DEBUG_INTR, "%s-->BH", __func__);
388 gigaset_schedule_event(inbuf->cs);
389 }
390 } else
391 gig_dbg(DEBUG_INTR, "Received zero block length");
392 resubmit = 1;
393 } else {
394 /* The urb might have been killed. */
395 gig_dbg(DEBUG_ANY, "%s - nonzero read bulk status received: %d",
396 __func__, urb->status);
397 if (urb->status != -ENOENT) { /* not killed */
398 if (!cs->connected) {
399 err("%s: disconnected", __func__); /* should never happen */
400 return;
401 }
402 resubmit = 1;
403 }
404 }
405
406 if (resubmit) {
407 spin_lock_irqsave(&cs->lock, flags);
408 r = cs->connected ? usb_submit_urb(urb, GFP_ATOMIC) : -ENODEV;
409 spin_unlock_irqrestore(&cs->lock, flags);
410 if (r)
411 dev_err(cs->dev, "error %d when resubmitting urb.\n",
412 -r);
413 }
414 }
415
416
417 /* This callback routine is called when data was transmitted to the device. */
418 static void gigaset_write_bulk_callback(struct urb *urb)
419 {
420 struct cardstate *cs = urb->context;
421 unsigned long flags;
422
423 if (urb->status)
424 dev_err(cs->dev, "bulk transfer failed (status %d)\n",
425 -urb->status);
426 /* That's all we can do. Communication problems
427 are handled by timeouts or network protocols. */
428
429 spin_lock_irqsave(&cs->lock, flags);
430 if (!cs->connected) {
431 err("%s: not connected", __func__);
432 } else {
433 atomic_set(&cs->hw.usb->busy, 0);
434 tasklet_schedule(&cs->write_tasklet);
435 }
436 spin_unlock_irqrestore(&cs->lock, flags);
437 }
438
439 static int send_cb(struct cardstate *cs, struct cmdbuf_t *cb)
440 {
441 struct cmdbuf_t *tcb;
442 unsigned long flags;
443 int count;
444 int status = -ENOENT; // FIXME
445 struct usb_cardstate *ucs = cs->hw.usb;
446
447 do {
448 if (!cb->len) {
449 tcb = cb;
450
451 spin_lock_irqsave(&cs->cmdlock, flags);
452 cs->cmdbytes -= cs->curlen;
453 gig_dbg(DEBUG_OUTPUT, "send_cb: sent %u bytes, %u left",
454 cs->curlen, cs->cmdbytes);
455 cs->cmdbuf = cb = cb->next;
456 if (cb) {
457 cb->prev = NULL;
458 cs->curlen = cb->len;
459 } else {
460 cs->lastcmdbuf = NULL;
461 cs->curlen = 0;
462 }
463 spin_unlock_irqrestore(&cs->cmdlock, flags);
464
465 if (tcb->wake_tasklet)
466 tasklet_schedule(tcb->wake_tasklet);
467 kfree(tcb);
468 }
469 if (cb) {
470 count = min(cb->len, ucs->bulk_out_size);
471 gig_dbg(DEBUG_OUTPUT, "send_cb: send %d bytes", count);
472
473 usb_fill_bulk_urb(ucs->bulk_out_urb, ucs->udev,
474 usb_sndbulkpipe(ucs->udev,
475 ucs->bulk_out_endpointAddr & 0x0f),
476 cb->buf + cb->offset, count,
477 gigaset_write_bulk_callback, cs);
478
479 cb->offset += count;
480 cb->len -= count;
481 atomic_set(&ucs->busy, 1);
482
483 spin_lock_irqsave(&cs->lock, flags);
484 status = cs->connected ? usb_submit_urb(ucs->bulk_out_urb, GFP_ATOMIC) : -ENODEV;
485 spin_unlock_irqrestore(&cs->lock, flags);
486
487 if (status) {
488 atomic_set(&ucs->busy, 0);
489 err("could not submit urb (error %d)\n",
490 -status);
491 cb->len = 0; /* skip urb => remove cb+wakeup
492 in next loop cycle */
493 }
494 }
495 } while (cb && status); /* next command on error */
496
497 return status;
498 }
499
500 /* Send command to device. */
501 static int gigaset_write_cmd(struct cardstate *cs, const unsigned char *buf,
502 int len, struct tasklet_struct *wake_tasklet)
503 {
504 struct cmdbuf_t *cb;
505 unsigned long flags;
506
507 gigaset_dbg_buffer(atomic_read(&cs->mstate) != MS_LOCKED ?
508 DEBUG_TRANSCMD : DEBUG_LOCKCMD,
509 "CMD Transmit", len, buf);
510
511 if (len <= 0)
512 return 0;
513
514 if (!(cb = kmalloc(sizeof(struct cmdbuf_t) + len, GFP_ATOMIC))) {
515 dev_err(cs->dev, "%s: out of memory\n", __func__);
516 return -ENOMEM;
517 }
518
519 memcpy(cb->buf, buf, len);
520 cb->len = len;
521 cb->offset = 0;
522 cb->next = NULL;
523 cb->wake_tasklet = wake_tasklet;
524
525 spin_lock_irqsave(&cs->cmdlock, flags);
526 cb->prev = cs->lastcmdbuf;
527 if (cs->lastcmdbuf)
528 cs->lastcmdbuf->next = cb;
529 else {
530 cs->cmdbuf = cb;
531 cs->curlen = len;
532 }
533 cs->cmdbytes += len;
534 cs->lastcmdbuf = cb;
535 spin_unlock_irqrestore(&cs->cmdlock, flags);
536
537 spin_lock_irqsave(&cs->lock, flags);
538 if (cs->connected)
539 tasklet_schedule(&cs->write_tasklet);
540 spin_unlock_irqrestore(&cs->lock, flags);
541 return len;
542 }
543
544 static int gigaset_write_room(struct cardstate *cs)
545 {
546 unsigned bytes;
547
548 bytes = cs->cmdbytes;
549 return bytes < IF_WRITEBUF ? IF_WRITEBUF - bytes : 0;
550 }
551
552 static int gigaset_chars_in_buffer(struct cardstate *cs)
553 {
554 return cs->cmdbytes;
555 }
556
557 static int gigaset_brkchars(struct cardstate *cs, const unsigned char buf[6])
558 {
559 #ifdef CONFIG_GIGASET_UNDOCREQ
560 struct usb_device *udev = cs->hw.usb->udev;
561
562 gigaset_dbg_buffer(DEBUG_USBREQ, "brkchars", 6, buf);
563 memcpy(cs->hw.usb->bchars, buf, 6);
564 return usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x19, 0x41,
565 0, 0, &buf, 6, 2000);
566 #else
567 return -EINVAL;
568 #endif
569 }
570
571 static int gigaset_freebcshw(struct bc_state *bcs)
572 {
573 /* unused */
574 return 1;
575 }
576
577 /* Initialize the b-channel structure */
578 static int gigaset_initbcshw(struct bc_state *bcs)
579 {
580 /* unused */
581 bcs->hw.usb = NULL;
582 return 1;
583 }
584
585 static void gigaset_reinitbcshw(struct bc_state *bcs)
586 {
587 /* nothing to do for M10x */
588 }
589
590 static void gigaset_freecshw(struct cardstate *cs)
591 {
592 tasklet_kill(&cs->write_tasklet);
593 kfree(cs->hw.usb);
594 }
595
596 static int gigaset_initcshw(struct cardstate *cs)
597 {
598 struct usb_cardstate *ucs;
599
600 cs->hw.usb = ucs =
601 kmalloc(sizeof(struct usb_cardstate), GFP_KERNEL);
602 if (!ucs)
603 return 0;
604
605 ucs->bchars[0] = 0;
606 ucs->bchars[1] = 0;
607 ucs->bchars[2] = 0;
608 ucs->bchars[3] = 0;
609 ucs->bchars[4] = 0x11;
610 ucs->bchars[5] = 0x13;
611 ucs->bulk_out_buffer = NULL;
612 ucs->bulk_out_urb = NULL;
613 //ucs->urb_cmd_out = NULL;
614 ucs->read_urb = NULL;
615 tasklet_init(&cs->write_tasklet,
616 &gigaset_modem_fill, (unsigned long) cs);
617
618 return 1;
619 }
620
621 /* Send data from current skb to the device. */
622 static int write_modem(struct cardstate *cs)
623 {
624 int ret = 0;
625 int count;
626 struct bc_state *bcs = &cs->bcs[0]; /* only one channel */
627 struct usb_cardstate *ucs = cs->hw.usb;
628 unsigned long flags;
629
630 gig_dbg(DEBUG_WRITE, "len: %d...", bcs->tx_skb->len);
631
632 if (!bcs->tx_skb->len) {
633 dev_kfree_skb_any(bcs->tx_skb);
634 bcs->tx_skb = NULL;
635 return -EINVAL;
636 }
637
638 /* Copy data to bulk out buffer and // FIXME copying not necessary
639 * transmit data
640 */
641 count = min(bcs->tx_skb->len, (unsigned) ucs->bulk_out_size);
642 skb_copy_from_linear_data(bcs->tx_skb, ucs->bulk_out_buffer, count);
643 skb_pull(bcs->tx_skb, count);
644 atomic_set(&ucs->busy, 1);
645 gig_dbg(DEBUG_OUTPUT, "write_modem: send %d bytes", count);
646
647 spin_lock_irqsave(&cs->lock, flags);
648 if (cs->connected) {
649 usb_fill_bulk_urb(ucs->bulk_out_urb, ucs->udev,
650 usb_sndbulkpipe(ucs->udev,
651 ucs->bulk_out_endpointAddr & 0x0f),
652 ucs->bulk_out_buffer, count,
653 gigaset_write_bulk_callback, cs);
654 ret = usb_submit_urb(ucs->bulk_out_urb, GFP_ATOMIC);
655 } else {
656 ret = -ENODEV;
657 }
658 spin_unlock_irqrestore(&cs->lock, flags);
659
660 if (ret) {
661 err("could not submit urb (error %d)\n", -ret);
662 atomic_set(&ucs->busy, 0);
663 }
664
665 if (!bcs->tx_skb->len) {
666 /* skb sent completely */
667 gigaset_skb_sent(bcs, bcs->tx_skb); //FIXME also, when ret<0?
668
669 gig_dbg(DEBUG_INTR, "kfree skb (Adr: %lx)!",
670 (unsigned long) bcs->tx_skb);
671 dev_kfree_skb_any(bcs->tx_skb);
672 bcs->tx_skb = NULL;
673 }
674
675 return ret;
676 }
677
678 static int gigaset_probe(struct usb_interface *interface,
679 const struct usb_device_id *id)
680 {
681 int retval;
682 struct usb_device *udev = interface_to_usbdev(interface);
683 unsigned int ifnum;
684 struct usb_host_interface *hostif;
685 struct cardstate *cs = NULL;
686 struct usb_cardstate *ucs = NULL;
687 struct usb_endpoint_descriptor *endpoint;
688 int buffer_size;
689 int alt;
690
691 gig_dbg(DEBUG_ANY,
692 "%s: Check if device matches .. (Vendor: 0x%x, Product: 0x%x)",
693 __func__, le16_to_cpu(udev->descriptor.idVendor),
694 le16_to_cpu(udev->descriptor.idProduct));
695
696 retval = -ENODEV; //FIXME
697
698 /* See if the device offered us matches what we can accept */
699 if ((le16_to_cpu(udev->descriptor.idVendor) != USB_M105_VENDOR_ID) ||
700 (le16_to_cpu(udev->descriptor.idProduct) != USB_M105_PRODUCT_ID))
701 return -ENODEV;
702
703 /* this starts to become ascii art... */
704 hostif = interface->cur_altsetting;
705 alt = hostif->desc.bAlternateSetting;
706 ifnum = hostif->desc.bInterfaceNumber; // FIXME ?
707
708 if (alt != 0 || ifnum != 0) {
709 dev_warn(&udev->dev, "ifnum %d, alt %d\n", ifnum, alt);
710 return -ENODEV;
711 }
712
713 /* Reject application specific intefaces
714 *
715 */
716 if (hostif->desc.bInterfaceClass != 255) {
717 dev_info(&udev->dev,
718 "%s: Device matched but iface_desc[%d]->bInterfaceClass==%d!\n",
719 __func__, ifnum, hostif->desc.bInterfaceClass);
720 return -ENODEV;
721 }
722
723 dev_info(&udev->dev, "%s: Device matched ... !\n", __func__);
724
725 cs = gigaset_getunassignedcs(driver);
726 if (!cs) {
727 dev_warn(&udev->dev, "no free cardstate\n");
728 return -ENODEV;
729 }
730 ucs = cs->hw.usb;
731
732 /* save off device structure ptrs for later use */
733 usb_get_dev(udev);
734 ucs->udev = udev;
735 ucs->interface = interface;
736 cs->dev = &interface->dev;
737
738 /* save address of controller structure */
739 usb_set_intfdata(interface, cs); // dev_set_drvdata(&interface->dev, cs);
740
741 endpoint = &hostif->endpoint[0].desc;
742
743 buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
744 ucs->bulk_out_size = buffer_size;
745 ucs->bulk_out_endpointAddr = endpoint->bEndpointAddress;
746 ucs->bulk_out_buffer = kmalloc(buffer_size, GFP_KERNEL);
747 if (!ucs->bulk_out_buffer) {
748 dev_err(cs->dev, "Couldn't allocate bulk_out_buffer\n");
749 retval = -ENOMEM;
750 goto error;
751 }
752
753 ucs->bulk_out_urb = usb_alloc_urb(0, GFP_KERNEL);
754 if (!ucs->bulk_out_urb) {
755 dev_err(cs->dev, "Couldn't allocate bulk_out_urb\n");
756 retval = -ENOMEM;
757 goto error;
758 }
759
760 endpoint = &hostif->endpoint[1].desc;
761
762 atomic_set(&ucs->busy, 0);
763
764 ucs->read_urb = usb_alloc_urb(0, GFP_KERNEL);
765 if (!ucs->read_urb) {
766 dev_err(cs->dev, "No free urbs available\n");
767 retval = -ENOMEM;
768 goto error;
769 }
770 buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
771 ucs->rcvbuf_size = buffer_size;
772 ucs->int_in_endpointAddr = endpoint->bEndpointAddress;
773 cs->inbuf[0].rcvbuf = kmalloc(buffer_size, GFP_KERNEL);
774 if (!cs->inbuf[0].rcvbuf) {
775 dev_err(cs->dev, "Couldn't allocate rcvbuf\n");
776 retval = -ENOMEM;
777 goto error;
778 }
779 /* Fill the interrupt urb and send it to the core */
780 usb_fill_int_urb(ucs->read_urb, udev,
781 usb_rcvintpipe(udev,
782 endpoint->bEndpointAddress & 0x0f),
783 cs->inbuf[0].rcvbuf, buffer_size,
784 gigaset_read_int_callback,
785 cs->inbuf + 0, endpoint->bInterval);
786
787 retval = usb_submit_urb(ucs->read_urb, GFP_KERNEL);
788 if (retval) {
789 dev_err(cs->dev, "Could not submit URB (error %d)\n", -retval);
790 goto error;
791 }
792
793 /* tell common part that the device is ready */
794 if (startmode == SM_LOCKED)
795 atomic_set(&cs->mstate, MS_LOCKED);
796
797 if (!gigaset_start(cs)) {
798 tasklet_kill(&cs->write_tasklet);
799 retval = -ENODEV; //FIXME
800 goto error;
801 }
802 return 0;
803
804 error:
805 usb_kill_urb(ucs->read_urb);
806 kfree(ucs->bulk_out_buffer);
807 usb_free_urb(ucs->bulk_out_urb);
808 kfree(cs->inbuf[0].rcvbuf);
809 usb_free_urb(ucs->read_urb);
810 usb_set_intfdata(interface, NULL);
811 ucs->read_urb = ucs->bulk_out_urb = NULL;
812 cs->inbuf[0].rcvbuf = ucs->bulk_out_buffer = NULL;
813 usb_put_dev(ucs->udev);
814 ucs->udev = NULL;
815 ucs->interface = NULL;
816 gigaset_unassign(cs);
817 return retval;
818 }
819
820 static void gigaset_disconnect(struct usb_interface *interface)
821 {
822 struct cardstate *cs;
823 struct usb_cardstate *ucs;
824
825 cs = usb_get_intfdata(interface);
826 ucs = cs->hw.usb;
827 usb_kill_urb(ucs->read_urb);
828
829 gigaset_stop(cs);
830
831 usb_set_intfdata(interface, NULL);
832 tasklet_kill(&cs->write_tasklet);
833
834 usb_kill_urb(ucs->bulk_out_urb); /* FIXME: only if active? */
835
836 kfree(ucs->bulk_out_buffer);
837 usb_free_urb(ucs->bulk_out_urb);
838 kfree(cs->inbuf[0].rcvbuf);
839 usb_free_urb(ucs->read_urb);
840 ucs->read_urb = ucs->bulk_out_urb = NULL;
841 cs->inbuf[0].rcvbuf = ucs->bulk_out_buffer = NULL;
842
843 usb_put_dev(ucs->udev);
844 ucs->interface = NULL;
845 ucs->udev = NULL;
846 cs->dev = NULL;
847 gigaset_unassign(cs);
848 }
849
850 static const struct gigaset_ops ops = {
851 gigaset_write_cmd,
852 gigaset_write_room,
853 gigaset_chars_in_buffer,
854 gigaset_brkchars,
855 gigaset_init_bchannel,
856 gigaset_close_bchannel,
857 gigaset_initbcshw,
858 gigaset_freebcshw,
859 gigaset_reinitbcshw,
860 gigaset_initcshw,
861 gigaset_freecshw,
862 gigaset_set_modem_ctrl,
863 gigaset_baud_rate,
864 gigaset_set_line_ctrl,
865 gigaset_m10x_send_skb,
866 gigaset_m10x_input,
867 };
868
869 /**
870 * usb_gigaset_init
871 * This function is called while kernel-module is loaded
872 */
873 static int __init usb_gigaset_init(void)
874 {
875 int result;
876
877 /* allocate memory for our driver state and intialize it */
878 if ((driver = gigaset_initdriver(GIGASET_MINOR, GIGASET_MINORS,
879 GIGASET_MODULENAME, GIGASET_DEVNAME,
880 &ops, THIS_MODULE)) == NULL)
881 goto error;
882
883 /* allocate memory for our device state and intialize it */
884 cardstate = gigaset_initcs(driver, 1, 1, 0, cidmode, GIGASET_MODULENAME);
885 if (!cardstate)
886 goto error;
887
888 /* register this driver with the USB subsystem */
889 result = usb_register(&gigaset_usb_driver);
890 if (result < 0) {
891 err("usb_gigaset: usb_register failed (error %d)",
892 -result);
893 goto error;
894 }
895
896 info(DRIVER_AUTHOR);
897 info(DRIVER_DESC);
898 return 0;
899
900 error: if (cardstate)
901 gigaset_freecs(cardstate);
902 cardstate = NULL;
903 if (driver)
904 gigaset_freedriver(driver);
905 driver = NULL;
906 return -1;
907 }
908
909
910 /**
911 * usb_gigaset_exit
912 * This function is called while unloading the kernel-module
913 */
914 static void __exit usb_gigaset_exit(void)
915 {
916 gigaset_blockdriver(driver); /* => probe will fail
917 * => no gigaset_start any more
918 */
919
920 gigaset_shutdown(cardstate);
921 /* from now on, no isdn callback should be possible */
922
923 /* deregister this driver with the USB subsystem */
924 usb_deregister(&gigaset_usb_driver);
925 /* this will call the disconnect-callback */
926 /* from now on, no disconnect/probe callback should be running */
927
928 gigaset_freecs(cardstate);
929 cardstate = NULL;
930 gigaset_freedriver(driver);
931 driver = NULL;
932 }
933
934
935 module_init(usb_gigaset_init);
936 module_exit(usb_gigaset_exit);
937
938 MODULE_AUTHOR(DRIVER_AUTHOR);
939 MODULE_DESCRIPTION(DRIVER_DESC);
940
941 MODULE_LICENSE("GPL");
Support for the Chinese Samsung S3C2440 based development boards