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NFS: Fix a bug in nfs_fscache_release_page()
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / isdn / gigaset / usb-gigaset.c
blob4deb1ab0dbf8176987473f24e14ef05cf265565a
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 static int gigaset_set_modem_ctrl(struct cardstate *cs, unsigned old_state,
157 unsigned new_state)
158 {
159 struct usb_device *udev = cs->hw.usb->udev;
160 unsigned mask, val;
161 int r;
162
163 mask = tiocm_to_gigaset(old_state ^ new_state);
164 val = tiocm_to_gigaset(new_state);
165
166 gig_dbg(DEBUG_USBREQ, "set flags 0x%02x with mask 0x%02x", val, mask);
167 // don't use this in an interrupt/BH
168 r = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 7, 0x41,
169 (val & 0xff) | ((mask & 0xff) << 8), 0,
170 NULL, 0, 2000 /* timeout? */);
171 if (r < 0)
172 return r;
173 //..
174 return 0;
175 }
176
177 /*
178 * Set M105 configuration value
179 * using undocumented device commands reverse engineered from USB traces
180 * of the Siemens Windows driver
181 */
182 static int set_value(struct cardstate *cs, u8 req, u16 val)
183 {
184 struct usb_device *udev = cs->hw.usb->udev;
185 int r, r2;
186
187 gig_dbg(DEBUG_USBREQ, "request %02x (%04x)",
188 (unsigned)req, (unsigned)val);
189 r = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x12, 0x41,
190 0xf /*?*/, 0, NULL, 0, 2000 /*?*/);
191 /* no idea what this does */
192 if (r < 0) {
193 dev_err(&udev->dev, "error %d on request 0x12\n", -r);
194 return r;
195 }
196
197 r = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), req, 0x41,
198 val, 0, NULL, 0, 2000 /*?*/);
199 if (r < 0)
200 dev_err(&udev->dev, "error %d on request 0x%02x\n",
201 -r, (unsigned)req);
202
203 r2 = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x19, 0x41,
204 0, 0, cs->hw.usb->bchars, 6, 2000 /*?*/);
205 if (r2 < 0)
206 dev_err(&udev->dev, "error %d on request 0x19\n", -r2);
207
208 return r < 0 ? r : (r2 < 0 ? r2 : 0);
209 }
210
211 /*
212 * set the baud rate on the internal serial adapter
213 * using the undocumented parameter setting command
214 */
215 static int gigaset_baud_rate(struct cardstate *cs, unsigned cflag)
216 {
217 u16 val;
218 u32 rate;
219
220 cflag &= CBAUD;
221
222 switch (cflag) {
223 //FIXME more values?
224 case B300: rate = 300; break;
225 case B600: rate = 600; break;
226 case B1200: rate = 1200; break;
227 case B2400: rate = 2400; break;
228 case B4800: rate = 4800; break;
229 case B9600: rate = 9600; break;
230 case B19200: rate = 19200; break;
231 case B38400: rate = 38400; break;
232 case B57600: rate = 57600; break;
233 case B115200: rate = 115200; break;
234 default:
235 rate = 9600;
236 dev_err(cs->dev, "unsupported baudrate request 0x%x,"
237 " using default of B9600\n", cflag);
238 }
239
240 val = 0x383fff / rate + 1;
241
242 return set_value(cs, 1, val);
243 }
244
245 /*
246 * set the line format on the internal serial adapter
247 * using the undocumented parameter setting command
248 */
249 static int gigaset_set_line_ctrl(struct cardstate *cs, unsigned cflag)
250 {
251 u16 val = 0;
252
253 /* set the parity */
254 if (cflag & PARENB)
255 val |= (cflag & PARODD) ? 0x10 : 0x20;
256
257 /* set the number of data bits */
258 switch (cflag & CSIZE) {
259 case CS5:
260 val |= 5 << 8; break;
261 case CS6:
262 val |= 6 << 8; break;
263 case CS7:
264 val |= 7 << 8; break;
265 case CS8:
266 val |= 8 << 8; break;
267 default:
268 dev_err(cs->dev, "CSIZE was not CS5-CS8, using default of 8\n");
269 val |= 8 << 8;
270 break;
271 }
272
273 /* set the number of stop bits */
274 if (cflag & CSTOPB) {
275 if ((cflag & CSIZE) == CS5)
276 val |= 1; /* 1.5 stop bits */ //FIXME is this okay?
277 else
278 val |= 2; /* 2 stop bits */
279 }
280
281 return set_value(cs, 3, val);
282 }
283
284
285 /*================================================================================================================*/
286 static int gigaset_init_bchannel(struct bc_state *bcs)
287 {
288 /* nothing to do for M10x */
289 gigaset_bchannel_up(bcs);
290 return 0;
291 }
292
293 static int gigaset_close_bchannel(struct bc_state *bcs)
294 {
295 /* nothing to do for M10x */
296 gigaset_bchannel_down(bcs);
297 return 0;
298 }
299
300 static int write_modem(struct cardstate *cs);
301 static int send_cb(struct cardstate *cs, struct cmdbuf_t *cb);
302
303
304 /* Write tasklet handler: Continue sending current skb, or send command, or
305 * start sending an skb from the send queue.
306 */
307 static void gigaset_modem_fill(unsigned long data)
308 {
309 struct cardstate *cs = (struct cardstate *) data;
310 struct bc_state *bcs = &cs->bcs[0]; /* only one channel */
311 struct cmdbuf_t *cb;
312 int again;
313
314 gig_dbg(DEBUG_OUTPUT, "modem_fill");
315
316 if (cs->hw.usb->busy) {
317 gig_dbg(DEBUG_OUTPUT, "modem_fill: busy");
318 return;
319 }
320
321 do {
322 again = 0;
323 if (!bcs->tx_skb) { /* no skb is being sent */
324 cb = cs->cmdbuf;
325 if (cb) { /* commands to send? */
326 gig_dbg(DEBUG_OUTPUT, "modem_fill: cb");
327 if (send_cb(cs, cb) < 0) {
328 gig_dbg(DEBUG_OUTPUT,
329 "modem_fill: send_cb failed");
330 again = 1; /* no callback will be
331 called! */
332 }
333 } else { /* skbs to send? */
334 bcs->tx_skb = skb_dequeue(&bcs->squeue);
335 if (bcs->tx_skb)
336 gig_dbg(DEBUG_INTR,
337 "Dequeued skb (Adr: %lx)!",
338 (unsigned long) bcs->tx_skb);
339 }
340 }
341
342 if (bcs->tx_skb) {
343 gig_dbg(DEBUG_OUTPUT, "modem_fill: tx_skb");
344 if (write_modem(cs) < 0) {
345 gig_dbg(DEBUG_OUTPUT,
346 "modem_fill: write_modem failed");
347 // FIXME should we tell the LL?
348 again = 1; /* no callback will be called! */
349 }
350 }
351 } while (again);
352 }
353
354 /*
355 * Interrupt Input URB completion routine
356 */
357 static void gigaset_read_int_callback(struct urb *urb)
358 {
359 struct inbuf_t *inbuf = urb->context;
360 struct cardstate *cs = inbuf->cs;
361 int status = urb->status;
362 int r;
363 unsigned numbytes;
364 unsigned char *src;
365 unsigned long flags;
366
367 if (!status) {
368 numbytes = urb->actual_length;
369
370 if (numbytes) {
371 src = inbuf->rcvbuf;
372 if (unlikely(*src))
373 dev_warn(cs->dev,
374 "%s: There was no leading 0, but 0x%02x!\n",
375 __func__, (unsigned) *src);
376 ++src; /* skip leading 0x00 */
377 --numbytes;
378 if (gigaset_fill_inbuf(inbuf, src, numbytes)) {
379 gig_dbg(DEBUG_INTR, "%s-->BH", __func__);
380 gigaset_schedule_event(inbuf->cs);
381 }
382 } else
383 gig_dbg(DEBUG_INTR, "Received zero block length");
384 } else {
385 /* The urb might have been killed. */
386 gig_dbg(DEBUG_ANY, "%s - nonzero status received: %d",
387 __func__, status);
388 if (status == -ENOENT || status == -ESHUTDOWN)
389 /* killed or endpoint shutdown: don't resubmit */
390 return;
391 }
392
393 /* resubmit URB */
394 spin_lock_irqsave(&cs->lock, flags);
395 if (!cs->connected) {
396 spin_unlock_irqrestore(&cs->lock, flags);
397 pr_err("%s: disconnected\n", __func__);
398 return;
399 }
400 r = usb_submit_urb(urb, GFP_ATOMIC);
401 spin_unlock_irqrestore(&cs->lock, flags);
402 if (r)
403 dev_err(cs->dev, "error %d resubmitting URB\n", -r);
404 }
405
406
407 /* This callback routine is called when data was transmitted to the device. */
408 static void gigaset_write_bulk_callback(struct urb *urb)
409 {
410 struct cardstate *cs = urb->context;
411 int status = urb->status;
412 unsigned long flags;
413
414 switch (status) {
415 case 0: /* normal completion */
416 break;
417 case -ENOENT: /* killed */
418 gig_dbg(DEBUG_ANY, "%s: killed", __func__);
419 cs->hw.usb->busy = 0;
420 return;
421 default:
422 dev_err(cs->dev, "bulk transfer failed (status %d)\n",
423 -status);
424 /* That's all we can do. Communication problems
425 are handled by timeouts or network protocols. */
426 }
427
428 spin_lock_irqsave(&cs->lock, flags);
429 if (!cs->connected) {
430 pr_err("%s: disconnected\n", __func__);
431 } else {
432 cs->hw.usb->busy = 0;
433 tasklet_schedule(&cs->write_tasklet);
434 }
435 spin_unlock_irqrestore(&cs->lock, flags);
436 }
437
438 static int send_cb(struct cardstate *cs, struct cmdbuf_t *cb)
439 {
440 struct cmdbuf_t *tcb;
441 unsigned long flags;
442 int count;
443 int status = -ENOENT; // FIXME
444 struct usb_cardstate *ucs = cs->hw.usb;
445
446 do {
447 if (!cb->len) {
448 tcb = cb;
449
450 spin_lock_irqsave(&cs->cmdlock, flags);
451 cs->cmdbytes -= cs->curlen;
452 gig_dbg(DEBUG_OUTPUT, "send_cb: sent %u bytes, %u left",
453 cs->curlen, cs->cmdbytes);
454 cs->cmdbuf = cb = cb->next;
455 if (cb) {
456 cb->prev = NULL;
457 cs->curlen = cb->len;
458 } else {
459 cs->lastcmdbuf = NULL;
460 cs->curlen = 0;
461 }
462 spin_unlock_irqrestore(&cs->cmdlock, flags);
463
464 if (tcb->wake_tasklet)
465 tasklet_schedule(tcb->wake_tasklet);
466 kfree(tcb);
467 }
468 if (cb) {
469 count = min(cb->len, ucs->bulk_out_size);
470 gig_dbg(DEBUG_OUTPUT, "send_cb: send %d bytes", count);
471
472 usb_fill_bulk_urb(ucs->bulk_out_urb, ucs->udev,
473 usb_sndbulkpipe(ucs->udev,
474 ucs->bulk_out_endpointAddr & 0x0f),
475 cb->buf + cb->offset, count,
476 gigaset_write_bulk_callback, cs);
477
478 cb->offset += count;
479 cb->len -= count;
480 ucs->busy = 1;
481
482 spin_lock_irqsave(&cs->lock, flags);
483 status = cs->connected ? usb_submit_urb(ucs->bulk_out_urb, GFP_ATOMIC) : -ENODEV;
484 spin_unlock_irqrestore(&cs->lock, flags);
485
486 if (status) {
487 ucs->busy = 0;
488 dev_err(cs->dev,
489 "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(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 /*
558 * set the break characters on the internal serial adapter
559 * using undocumented device commands reverse engineered from USB traces
560 * of the Siemens Windows driver
561 */
562 static int gigaset_brkchars(struct cardstate *cs, const unsigned char buf[6])
563 {
564 struct usb_device *udev = cs->hw.usb->udev;
565
566 gigaset_dbg_buffer(DEBUG_USBREQ, "brkchars", 6, buf);
567 memcpy(cs->hw.usb->bchars, buf, 6);
568 return usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x19, 0x41,
569 0, 0, &buf, 6, 2000);
570 }
571
572 static int gigaset_freebcshw(struct bc_state *bcs)
573 {
574 /* unused */
575 return 1;
576 }
577
578 /* Initialize the b-channel structure */
579 static int gigaset_initbcshw(struct bc_state *bcs)
580 {
581 /* unused */
582 bcs->hw.usb = NULL;
583 return 1;
584 }
585
586 static void gigaset_reinitbcshw(struct bc_state *bcs)
587 {
588 /* nothing to do for M10x */
589 }
590
591 static void gigaset_freecshw(struct cardstate *cs)
592 {
593 tasklet_kill(&cs->write_tasklet);
594 kfree(cs->hw.usb);
595 }
596
597 static int gigaset_initcshw(struct cardstate *cs)
598 {
599 struct usb_cardstate *ucs;
600
601 cs->hw.usb = ucs =
602 kmalloc(sizeof(struct usb_cardstate), GFP_KERNEL);
603 if (!ucs) {
604 pr_err("out of memory\n");
605 return 0;
606 }
607
608 ucs->bchars[0] = 0;
609 ucs->bchars[1] = 0;
610 ucs->bchars[2] = 0;
611 ucs->bchars[3] = 0;
612 ucs->bchars[4] = 0x11;
613 ucs->bchars[5] = 0x13;
614 ucs->bulk_out_buffer = NULL;
615 ucs->bulk_out_urb = NULL;
616 ucs->read_urb = NULL;
617 tasklet_init(&cs->write_tasklet,
618 &gigaset_modem_fill, (unsigned long) cs);
619
620 return 1;
621 }
622
623 /* Send data from current skb to the device. */
624 static int write_modem(struct cardstate *cs)
625 {
626 int ret = 0;
627 int count;
628 struct bc_state *bcs = &cs->bcs[0]; /* only one channel */
629 struct usb_cardstate *ucs = cs->hw.usb;
630 unsigned long flags;
631
632 gig_dbg(DEBUG_WRITE, "len: %d...", bcs->tx_skb->len);
633
634 if (!bcs->tx_skb->len) {
635 dev_kfree_skb_any(bcs->tx_skb);
636 bcs->tx_skb = NULL;
637 return -EINVAL;
638 }
639
640 /* Copy data to bulk out buffer and // FIXME copying not necessary
641 * transmit data
642 */
643 count = min(bcs->tx_skb->len, (unsigned) ucs->bulk_out_size);
644 skb_copy_from_linear_data(bcs->tx_skb, ucs->bulk_out_buffer, count);
645 skb_pull(bcs->tx_skb, count);
646 ucs->busy = 1;
647 gig_dbg(DEBUG_OUTPUT, "write_modem: send %d bytes", count);
648
649 spin_lock_irqsave(&cs->lock, flags);
650 if (cs->connected) {
651 usb_fill_bulk_urb(ucs->bulk_out_urb, ucs->udev,
652 usb_sndbulkpipe(ucs->udev,
653 ucs->bulk_out_endpointAddr & 0x0f),
654 ucs->bulk_out_buffer, count,
655 gigaset_write_bulk_callback, cs);
656 ret = usb_submit_urb(ucs->bulk_out_urb, GFP_ATOMIC);
657 } else {
658 ret = -ENODEV;
659 }
660 spin_unlock_irqrestore(&cs->lock, flags);
661
662 if (ret) {
663 dev_err(cs->dev, "could not submit urb (error %d)\n", -ret);
664 ucs->busy = 0;
665 }
666
667 if (!bcs->tx_skb->len) {
668 /* skb sent completely */
669 gigaset_skb_sent(bcs, bcs->tx_skb); //FIXME also, when ret<0?
670
671 gig_dbg(DEBUG_INTR, "kfree skb (Adr: %lx)!",
672 (unsigned long) bcs->tx_skb);
673 dev_kfree_skb_any(bcs->tx_skb);
674 bcs->tx_skb = NULL;
675 }
676
677 return ret;
678 }
679
680 static int gigaset_probe(struct usb_interface *interface,
681 const struct usb_device_id *id)
682 {
683 int retval;
684 struct usb_device *udev = interface_to_usbdev(interface);
685 struct usb_host_interface *hostif = interface->cur_altsetting;
686 struct cardstate *cs = NULL;
687 struct usb_cardstate *ucs = NULL;
688 struct usb_endpoint_descriptor *endpoint;
689 int buffer_size;
690
691 gig_dbg(DEBUG_ANY, "%s: Check if device matches ...", __func__);
692
693 /* See if the device offered us matches what we can accept */
694 if ((le16_to_cpu(udev->descriptor.idVendor) != USB_M105_VENDOR_ID) ||
695 (le16_to_cpu(udev->descriptor.idProduct) != USB_M105_PRODUCT_ID)) {
696 gig_dbg(DEBUG_ANY, "device ID (0x%x, 0x%x) not for me - skip",
697 le16_to_cpu(udev->descriptor.idVendor),
698 le16_to_cpu(udev->descriptor.idProduct));
699 return -ENODEV;
700 }
701 if (hostif->desc.bInterfaceNumber != 0) {
702 gig_dbg(DEBUG_ANY, "interface %d not for me - skip",
703 hostif->desc.bInterfaceNumber);
704 return -ENODEV;
705 }
706 if (hostif->desc.bAlternateSetting != 0) {
707 dev_notice(&udev->dev, "unsupported altsetting %d - skip",
708 hostif->desc.bAlternateSetting);
709 return -ENODEV;
710 }
711 if (hostif->desc.bInterfaceClass != 255) {
712 dev_notice(&udev->dev, "unsupported interface class %d - skip",
713 hostif->desc.bInterfaceClass);
714 return -ENODEV;
715 }
716
717 dev_info(&udev->dev, "%s: Device matched ... !\n", __func__);
718
719 /* allocate memory for our device state and intialize it */
720 cs = gigaset_initcs(driver, 1, 1, 0, cidmode, GIGASET_MODULENAME);
721 if (!cs)
722 return -ENODEV;
723 ucs = cs->hw.usb;
724
725 /* save off device structure ptrs for later use */
726 usb_get_dev(udev);
727 ucs->udev = udev;
728 ucs->interface = interface;
729 cs->dev = &interface->dev;
730
731 /* save address of controller structure */
732 usb_set_intfdata(interface, cs);
733
734 endpoint = &hostif->endpoint[0].desc;
735
736 buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
737 ucs->bulk_out_size = buffer_size;
738 ucs->bulk_out_endpointAddr = endpoint->bEndpointAddress;
739 ucs->bulk_out_buffer = kmalloc(buffer_size, GFP_KERNEL);
740 if (!ucs->bulk_out_buffer) {
741 dev_err(cs->dev, "Couldn't allocate bulk_out_buffer\n");
742 retval = -ENOMEM;
743 goto error;
744 }
745
746 ucs->bulk_out_urb = usb_alloc_urb(0, GFP_KERNEL);
747 if (!ucs->bulk_out_urb) {
748 dev_err(cs->dev, "Couldn't allocate bulk_out_urb\n");
749 retval = -ENOMEM;
750 goto error;
751 }
752
753 endpoint = &hostif->endpoint[1].desc;
754
755 ucs->busy = 0;
756
757 ucs->read_urb = usb_alloc_urb(0, GFP_KERNEL);
758 if (!ucs->read_urb) {
759 dev_err(cs->dev, "No free urbs available\n");
760 retval = -ENOMEM;
761 goto error;
762 }
763 buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
764 ucs->rcvbuf_size = buffer_size;
765 ucs->int_in_endpointAddr = endpoint->bEndpointAddress;
766 cs->inbuf[0].rcvbuf = kmalloc(buffer_size, GFP_KERNEL);
767 if (!cs->inbuf[0].rcvbuf) {
768 dev_err(cs->dev, "Couldn't allocate rcvbuf\n");
769 retval = -ENOMEM;
770 goto error;
771 }
772 /* Fill the interrupt urb and send it to the core */
773 usb_fill_int_urb(ucs->read_urb, udev,
774 usb_rcvintpipe(udev,
775 endpoint->bEndpointAddress & 0x0f),
776 cs->inbuf[0].rcvbuf, buffer_size,
777 gigaset_read_int_callback,
778 cs->inbuf + 0, endpoint->bInterval);
779
780 retval = usb_submit_urb(ucs->read_urb, GFP_KERNEL);
781 if (retval) {
782 dev_err(cs->dev, "Could not submit URB (error %d)\n", -retval);
783 goto error;
784 }
785
786 /* tell common part that the device is ready */
787 if (startmode == SM_LOCKED)
788 cs->mstate = MS_LOCKED;
789
790 if (!gigaset_start(cs)) {
791 tasklet_kill(&cs->write_tasklet);
792 retval = -ENODEV; //FIXME
793 goto error;
794 }
795 return 0;
796
797 error:
798 usb_kill_urb(ucs->read_urb);
799 kfree(ucs->bulk_out_buffer);
800 usb_free_urb(ucs->bulk_out_urb);
801 kfree(cs->inbuf[0].rcvbuf);
802 usb_free_urb(ucs->read_urb);
803 usb_set_intfdata(interface, NULL);
804 ucs->read_urb = ucs->bulk_out_urb = NULL;
805 cs->inbuf[0].rcvbuf = ucs->bulk_out_buffer = NULL;
806 usb_put_dev(ucs->udev);
807 ucs->udev = NULL;
808 ucs->interface = NULL;
809 gigaset_freecs(cs);
810 return retval;
811 }
812
813 static void gigaset_disconnect(struct usb_interface *interface)
814 {
815 struct cardstate *cs;
816 struct usb_cardstate *ucs;
817
818 cs = usb_get_intfdata(interface);
819 ucs = cs->hw.usb;
820
821 dev_info(cs->dev, "disconnecting Gigaset USB adapter\n");
822
823 usb_kill_urb(ucs->read_urb);
824
825 gigaset_stop(cs);
826
827 usb_set_intfdata(interface, NULL);
828 tasklet_kill(&cs->write_tasklet);
829
830 usb_kill_urb(ucs->bulk_out_urb);
831
832 kfree(ucs->bulk_out_buffer);
833 usb_free_urb(ucs->bulk_out_urb);
834 kfree(cs->inbuf[0].rcvbuf);
835 usb_free_urb(ucs->read_urb);
836 ucs->read_urb = ucs->bulk_out_urb = NULL;
837 cs->inbuf[0].rcvbuf = ucs->bulk_out_buffer = NULL;
838
839 usb_put_dev(ucs->udev);
840 ucs->interface = NULL;
841 ucs->udev = NULL;
842 cs->dev = NULL;
843 gigaset_freecs(cs);
844 }
845
846 /* gigaset_suspend
847 * This function is called before the USB connection is suspended or reset.
848 */
849 static int gigaset_suspend(struct usb_interface *intf, pm_message_t message)
850 {
851 struct cardstate *cs = usb_get_intfdata(intf);
852
853 /* stop activity */
854 cs->connected = 0; /* prevent rescheduling */
855 usb_kill_urb(cs->hw.usb->read_urb);
856 tasklet_kill(&cs->write_tasklet);
857 usb_kill_urb(cs->hw.usb->bulk_out_urb);
858
859 gig_dbg(DEBUG_SUSPEND, "suspend complete");
860 return 0;
861 }
862
863 /* gigaset_resume
864 * This function is called after the USB connection has been resumed or reset.
865 */
866 static int gigaset_resume(struct usb_interface *intf)
867 {
868 struct cardstate *cs = usb_get_intfdata(intf);
869 int rc;
870
871 /* resubmit interrupt URB */
872 cs->connected = 1;
873 rc = usb_submit_urb(cs->hw.usb->read_urb, GFP_KERNEL);
874 if (rc) {
875 dev_err(cs->dev, "Could not submit read URB (error %d)\n", -rc);
876 return rc;
877 }
878
879 gig_dbg(DEBUG_SUSPEND, "resume complete");
880 return 0;
881 }
882
883 /* gigaset_pre_reset
884 * This function is called before the USB connection is reset.
885 */
886 static int gigaset_pre_reset(struct usb_interface *intf)
887 {
888 /* same as suspend */
889 return gigaset_suspend(intf, PMSG_ON);
890 }
891
892 static const struct gigaset_ops ops = {
893 gigaset_write_cmd,
894 gigaset_write_room,
895 gigaset_chars_in_buffer,
896 gigaset_brkchars,
897 gigaset_init_bchannel,
898 gigaset_close_bchannel,
899 gigaset_initbcshw,
900 gigaset_freebcshw,
901 gigaset_reinitbcshw,
902 gigaset_initcshw,
903 gigaset_freecshw,
904 gigaset_set_modem_ctrl,
905 gigaset_baud_rate,
906 gigaset_set_line_ctrl,
907 gigaset_m10x_send_skb,
908 gigaset_m10x_input,
909 };
910
911 /*
912 * This function is called while kernel-module is loaded
913 */
914 static int __init usb_gigaset_init(void)
915 {
916 int result;
917
918 /* allocate memory for our driver state and intialize it */
919 if ((driver = gigaset_initdriver(GIGASET_MINOR, GIGASET_MINORS,
920 GIGASET_MODULENAME, GIGASET_DEVNAME,
921 &ops, THIS_MODULE)) == NULL)
922 goto error;
923
924 /* register this driver with the USB subsystem */
925 result = usb_register(&gigaset_usb_driver);
926 if (result < 0) {
927 pr_err("error %d registering USB driver\n", -result);
928 goto error;
929 }
930
931 pr_info(DRIVER_DESC "\n");
932 return 0;
933
934 error:
935 if (driver)
936 gigaset_freedriver(driver);
937 driver = NULL;
938 return -1;
939 }
940
941 /*
942 * This function is called while unloading the kernel-module
943 */
944 static void __exit usb_gigaset_exit(void)
945 {
946 int i;
947
948 gigaset_blockdriver(driver); /* => probe will fail
949 * => no gigaset_start any more
950 */
951
952 /* stop all connected devices */
953 for (i = 0; i < driver->minors; i++)
954 gigaset_shutdown(driver->cs + i);
955
956 /* from now on, no isdn callback should be possible */
957
958 /* deregister this driver with the USB subsystem */
959 usb_deregister(&gigaset_usb_driver);
960 /* this will call the disconnect-callback */
961 /* from now on, no disconnect/probe callback should be running */
962
963 gigaset_freedriver(driver);
964 driver = NULL;
965 }
966
967
968 module_init(usb_gigaset_init);
969 module_exit(usb_gigaset_exit);
970
971 MODULE_AUTHOR(DRIVER_AUTHOR);
972 MODULE_DESCRIPTION(DRIVER_DESC);
973
974 MODULE_LICENSE("GPL");
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree