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 #include <linux/usb.h>
20 #include <linux/module.h>
21 #include <linux/moduleparam.h>
22
23 /* Version Information */
24 #define DRIVER_AUTHOR "Hansjoerg Lipp <hjlipp@web.de>, Stefan Eilers"
25 #define DRIVER_DESC "USB Driver for Gigaset 307x using M105"
26
27 /* Module parameters */
28
29 static int startmode = SM_ISDN;
30 static int cidmode = 1;
31
32 module_param(startmode, int, S_IRUGO);
33 module_param(cidmode, int, S_IRUGO);
34 MODULE_PARM_DESC(startmode, "start in isdn4linux mode");
35 MODULE_PARM_DESC(cidmode, "Call-ID mode");
36
37 #define GIGASET_MINORS 1
38 #define GIGASET_MINOR 8
39 #define GIGASET_MODULENAME "usb_gigaset"
40 #define GIGASET_DEVNAME "ttyGU"
41
42 /* length limit according to Siemens 3070usb-protokoll.doc ch. 2.1 */
43 #define IF_WRITEBUF 264
44
45 /* Values for the Gigaset M105 Data */
46 #define USB_M105_VENDOR_ID 0x0681
47 #define USB_M105_PRODUCT_ID 0x0009
48
49 /* table of devices that work with this driver */
50 static const struct usb_device_id gigaset_table[] = {
51 { USB_DEVICE(USB_M105_VENDOR_ID, USB_M105_PRODUCT_ID) },
52 { } /* Terminating entry */
53 };
54
55 MODULE_DEVICE_TABLE(usb, gigaset_table);
56
57 /*
58 * Control requests (empty fields: 00)
59 *
60 * RT|RQ|VALUE|INDEX|LEN |DATA
61 * In:
62 * C1 08 01
63 * Get flags (1 byte). Bits: 0=dtr,1=rts,3-7:?
64 * C1 0F ll ll
65 * Get device information/status (llll: 0x200 and 0x40 seen).
66 * Real size: I only saw MIN(llll,0x64).
67 * Contents: seems to be always the same...
68 * offset 0x00: Length of this structure (0x64) (len: 1,2,3 bytes)
69 * offset 0x3c: String (16 bit chars): "MCCI USB Serial V2.0"
70 * rest: ?
71 * Out:
72 * 41 11
73 * Initialize/reset device ?
74 * 41 00 xx 00
75 * ? (xx=00 or 01; 01 on start, 00 on close)
76 * 41 07 vv mm
77 * Set/clear flags vv=value, mm=mask (see RQ 08)
78 * 41 12 xx
79 * Used before the following configuration requests are issued
80 * (with xx=0x0f). I've seen other values<0xf, though.
81 * 41 01 xx xx
82 * Set baud rate. xxxx=ceil(0x384000/rate)=trunc(0x383fff/rate)+1.
83 * 41 03 ps bb
84 * Set byte size and parity. p: 0x20=even,0x10=odd,0x00=no parity
85 * [ 0x30: m, 0x40: s ]
86 * [s: 0: 1 stop bit; 1: 1.5; 2: 2]
87 * bb: bits/byte (seen 7 and 8)
88 * 41 13 -- -- -- -- 10 00 ww 00 00 00 xx 00 00 00 yy 00 00 00 zz 00 00 00
89 * ??
90 * Initialization: 01, 40, 00, 00
91 * Open device: 00 40, 00, 00
92 * yy and zz seem to be equal, either 0x00 or 0x0a
93 * (ww,xx) pairs seen: (00,00), (00,40), (01,40), (09,80), (19,80)
94 * 41 19 -- -- -- -- 06 00 00 00 00 xx 11 13
95 * Used after every "configuration sequence" (RQ 12, RQs 01/03/13).
96 * xx is usually 0x00 but was 0x7e before starting data transfer
97 * in unimodem mode. So, this might be an array of characters that
98 * need special treatment ("commit all bufferd data"?), 11=^Q, 13=^S.
99 *
100 * Unimodem mode: use "modprobe ppp_async flag_time=0" as the device _needs_ two
101 * flags per packet.
102 */
103
104 /* functions called if a device of this driver is connected/disconnected */
105 static int gigaset_probe(struct usb_interface *interface,
106 const struct usb_device_id *id);
107 static void gigaset_disconnect(struct usb_interface *interface);
108
109 /* functions called before/after suspend */
110 static int gigaset_suspend(struct usb_interface *intf, pm_message_t message);
111 static int gigaset_resume(struct usb_interface *intf);
112 static int gigaset_pre_reset(struct usb_interface *intf);
113
114 static struct gigaset_driver *driver;
115
116 /* usb specific object needed to register this driver with the usb subsystem */
117 static struct usb_driver gigaset_usb_driver = {
118 .name = GIGASET_MODULENAME,
119 .probe = gigaset_probe,
120 .disconnect = gigaset_disconnect,
121 .id_table = gigaset_table,
122 .suspend = gigaset_suspend,
123 .resume = gigaset_resume,
124 .reset_resume = gigaset_resume,
125 .pre_reset = gigaset_pre_reset,
126 .post_reset = gigaset_resume,
127 .disable_hub_initiated_lpm = 1,
128 };
129
130 struct usb_cardstate {
131 struct usb_device *udev; /* usb device pointer */
132 struct usb_interface *interface; /* interface for this device */
133 int busy; /* bulk output in progress */
134
135 /* Output buffer */
136 unsigned char *bulk_out_buffer;
137 int bulk_out_size;
138 int bulk_out_epnum;
139 struct urb *bulk_out_urb;
140
141 /* Input buffer */
142 unsigned char *rcvbuf;
143 int rcvbuf_size;
144 struct urb *read_urb;
145
146 char bchars[6]; /* for request 0x19 */
147 };
148
tiocm_to_gigaset(unsigned state)149 static inline unsigned tiocm_to_gigaset(unsigned state)
150 {
151 return ((state & TIOCM_DTR) ? 1 : 0) | ((state & TIOCM_RTS) ? 2 : 0);
152 }
153
gigaset_set_modem_ctrl(struct cardstate * cs,unsigned old_state,unsigned new_state)154 static int gigaset_set_modem_ctrl(struct cardstate *cs, unsigned old_state,
155 unsigned new_state)
156 {
157 struct usb_device *udev = cs->hw.usb->udev;
158 unsigned mask, val;
159 int r;
160
161 mask = tiocm_to_gigaset(old_state ^ new_state);
162 val = tiocm_to_gigaset(new_state);
163
164 gig_dbg(DEBUG_USBREQ, "set flags 0x%02x with mask 0x%02x", val, mask);
165 r = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 7, 0x41,
166 (val & 0xff) | ((mask & 0xff) << 8), 0,
167 NULL, 0, 2000 /* timeout? */);
168 if (r < 0)
169 return r;
170 return 0;
171 }
172
173 /*
174 * Set M105 configuration value
175 * using undocumented device commands reverse engineered from USB traces
176 * of the Siemens Windows driver
177 */
set_value(struct cardstate * cs,u8 req,u16 val)178 static int set_value(struct cardstate *cs, u8 req, u16 val)
179 {
180 struct usb_device *udev = cs->hw.usb->udev;
181 int r, r2;
182
183 gig_dbg(DEBUG_USBREQ, "request %02x (%04x)",
184 (unsigned)req, (unsigned)val);
185 r = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x12, 0x41,
186 0xf /*?*/, 0, NULL, 0, 2000 /*?*/);
187 /* no idea what this does */
188 if (r < 0) {
189 dev_err(&udev->dev, "error %d on request 0x12\n", -r);
190 return r;
191 }
192
193 r = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), req, 0x41,
194 val, 0, NULL, 0, 2000 /*?*/);
195 if (r < 0)
196 dev_err(&udev->dev, "error %d on request 0x%02x\n",
197 -r, (unsigned)req);
198
199 r2 = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x19, 0x41,
200 0, 0, cs->hw.usb->bchars, 6, 2000 /*?*/);
201 if (r2 < 0)
202 dev_err(&udev->dev, "error %d on request 0x19\n", -r2);
203
204 return r < 0 ? r : (r2 < 0 ? r2 : 0);
205 }
206
207 /*
208 * set the baud rate on the internal serial adapter
209 * using the undocumented parameter setting command
210 */
gigaset_baud_rate(struct cardstate * cs,unsigned cflag)211 static int gigaset_baud_rate(struct cardstate *cs, unsigned cflag)
212 {
213 u16 val;
214 u32 rate;
215
216 cflag &= CBAUD;
217
218 switch (cflag) {
219 case B300: rate = 300; break;
220 case B600: rate = 600; break;
221 case B1200: rate = 1200; break;
222 case B2400: rate = 2400; break;
223 case B4800: rate = 4800; break;
224 case B9600: rate = 9600; break;
225 case B19200: rate = 19200; break;
226 case B38400: rate = 38400; break;
227 case B57600: rate = 57600; break;
228 case B115200: rate = 115200; break;
229 default:
230 rate = 9600;
231 dev_err(cs->dev, "unsupported baudrate request 0x%x,"
232 " using default of B9600\n", cflag);
233 }
234
235 val = 0x383fff / rate + 1;
236
237 return set_value(cs, 1, val);
238 }
239
240 /*
241 * set the line format on the internal serial adapter
242 * using the undocumented parameter setting command
243 */
gigaset_set_line_ctrl(struct cardstate * cs,unsigned cflag)244 static int gigaset_set_line_ctrl(struct cardstate *cs, unsigned cflag)
245 {
246 u16 val = 0;
247
248 /* set the parity */
249 if (cflag & PARENB)
250 val |= (cflag & PARODD) ? 0x10 : 0x20;
251
252 /* set the number of data bits */
253 switch (cflag & CSIZE) {
254 case CS5:
255 val |= 5 << 8; break;
256 case CS6:
257 val |= 6 << 8; break;
258 case CS7:
259 val |= 7 << 8; break;
260 case CS8:
261 val |= 8 << 8; break;
262 default:
263 dev_err(cs->dev, "CSIZE was not CS5-CS8, using default of 8\n");
264 val |= 8 << 8;
265 break;
266 }
267
268 /* set the number of stop bits */
269 if (cflag & CSTOPB) {
270 if ((cflag & CSIZE) == CS5)
271 val |= 1; /* 1.5 stop bits */
272 else
273 val |= 2; /* 2 stop bits */
274 }
275
276 return set_value(cs, 3, val);
277 }
278
279
280 /*============================================================================*/
gigaset_init_bchannel(struct bc_state * bcs)281 static int gigaset_init_bchannel(struct bc_state *bcs)
282 {
283 /* nothing to do for M10x */
284 gigaset_bchannel_up(bcs);
285 return 0;
286 }
287
gigaset_close_bchannel(struct bc_state * bcs)288 static int gigaset_close_bchannel(struct bc_state *bcs)
289 {
290 /* nothing to do for M10x */
291 gigaset_bchannel_down(bcs);
292 return 0;
293 }
294
295 static int write_modem(struct cardstate *cs);
296 static int send_cb(struct cardstate *cs);
297
298
299 /* Write tasklet handler: Continue sending current skb, or send command, or
300 * start sending an skb from the send queue.
301 */
gigaset_modem_fill(unsigned long data)302 static void gigaset_modem_fill(unsigned long data)
303 {
304 struct cardstate *cs = (struct cardstate *) data;
305 struct bc_state *bcs = &cs->bcs[0]; /* only one channel */
306
307 gig_dbg(DEBUG_OUTPUT, "modem_fill");
308
309 if (cs->hw.usb->busy) {
310 gig_dbg(DEBUG_OUTPUT, "modem_fill: busy");
311 return;
312 }
313
314 again:
315 if (!bcs->tx_skb) { /* no skb is being sent */
316 if (cs->cmdbuf) { /* commands to send? */
317 gig_dbg(DEBUG_OUTPUT, "modem_fill: cb");
318 if (send_cb(cs) < 0) {
319 gig_dbg(DEBUG_OUTPUT,
320 "modem_fill: send_cb failed");
321 goto again; /* no callback will be called! */
322 }
323 return;
324 }
325
326 /* skbs to send? */
327 bcs->tx_skb = skb_dequeue(&bcs->squeue);
328 if (!bcs->tx_skb)
329 return;
330
331 gig_dbg(DEBUG_INTR, "Dequeued skb (Adr: %lx)!",
332 (unsigned long) bcs->tx_skb);
333 }
334
335 gig_dbg(DEBUG_OUTPUT, "modem_fill: tx_skb");
336 if (write_modem(cs) < 0) {
337 gig_dbg(DEBUG_OUTPUT, "modem_fill: write_modem failed");
338 goto again; /* no callback will be called! */
339 }
340 }
341
342 /*
343 * Interrupt Input URB completion routine
344 */
gigaset_read_int_callback(struct urb * urb)345 static void gigaset_read_int_callback(struct urb *urb)
346 {
347 struct cardstate *cs = urb->context;
348 struct inbuf_t *inbuf = cs->inbuf;
349 int status = urb->status;
350 int r;
351 unsigned numbytes;
352 unsigned char *src;
353 unsigned long flags;
354
355 if (!status) {
356 numbytes = urb->actual_length;
357
358 if (numbytes) {
359 src = cs->hw.usb->rcvbuf;
360 if (unlikely(*src))
361 dev_warn(cs->dev,
362 "%s: There was no leading 0, but 0x%02x!\n",
363 __func__, (unsigned) *src);
364 ++src; /* skip leading 0x00 */
365 --numbytes;
366 if (gigaset_fill_inbuf(inbuf, src, numbytes)) {
367 gig_dbg(DEBUG_INTR, "%s-->BH", __func__);
368 gigaset_schedule_event(inbuf->cs);
369 }
370 } else
371 gig_dbg(DEBUG_INTR, "Received zero block length");
372 } else {
373 /* The urb might have been killed. */
374 gig_dbg(DEBUG_ANY, "%s - nonzero status received: %d",
375 __func__, status);
376 if (status == -ENOENT || status == -ESHUTDOWN)
377 /* killed or endpoint shutdown: don't resubmit */
378 return;
379 }
380
381 /* resubmit URB */
382 spin_lock_irqsave(&cs->lock, flags);
383 if (!cs->connected) {
384 spin_unlock_irqrestore(&cs->lock, flags);
385 pr_err("%s: disconnected\n", __func__);
386 return;
387 }
388 r = usb_submit_urb(urb, GFP_ATOMIC);
389 spin_unlock_irqrestore(&cs->lock, flags);
390 if (r)
391 dev_err(cs->dev, "error %d resubmitting URB\n", -r);
392 }
393
394
395 /* This callback routine is called when data was transmitted to the device. */
gigaset_write_bulk_callback(struct urb * urb)396 static void gigaset_write_bulk_callback(struct urb *urb)
397 {
398 struct cardstate *cs = urb->context;
399 int status = urb->status;
400 unsigned long flags;
401
402 switch (status) {
403 case 0: /* normal completion */
404 break;
405 case -ENOENT: /* killed */
406 gig_dbg(DEBUG_ANY, "%s: killed", __func__);
407 cs->hw.usb->busy = 0;
408 return;
409 default:
410 dev_err(cs->dev, "bulk transfer failed (status %d)\n",
411 -status);
412 /* That's all we can do. Communication problems
413 are handled by timeouts or network protocols. */
414 }
415
416 spin_lock_irqsave(&cs->lock, flags);
417 if (!cs->connected) {
418 pr_err("%s: disconnected\n", __func__);
419 } else {
420 cs->hw.usb->busy = 0;
421 tasklet_schedule(&cs->write_tasklet);
422 }
423 spin_unlock_irqrestore(&cs->lock, flags);
424 }
425
send_cb(struct cardstate * cs)426 static int send_cb(struct cardstate *cs)
427 {
428 struct cmdbuf_t *cb = cs->cmdbuf;
429 unsigned long flags;
430 int count;
431 int status = -ENOENT;
432 struct usb_cardstate *ucs = cs->hw.usb;
433
434 do {
435 if (!cb->len) {
436 spin_lock_irqsave(&cs->cmdlock, flags);
437 cs->cmdbytes -= cs->curlen;
438 gig_dbg(DEBUG_OUTPUT, "send_cb: sent %u bytes, %u left",
439 cs->curlen, cs->cmdbytes);
440 cs->cmdbuf = cb->next;
441 if (cs->cmdbuf) {
442 cs->cmdbuf->prev = NULL;
443 cs->curlen = cs->cmdbuf->len;
444 } else {
445 cs->lastcmdbuf = NULL;
446 cs->curlen = 0;
447 }
448 spin_unlock_irqrestore(&cs->cmdlock, flags);
449
450 if (cb->wake_tasklet)
451 tasklet_schedule(cb->wake_tasklet);
452 kfree(cb);
453
454 cb = cs->cmdbuf;
455 }
456
457 if (cb) {
458 count = min(cb->len, ucs->bulk_out_size);
459 gig_dbg(DEBUG_OUTPUT, "send_cb: send %d bytes", count);
460
461 usb_fill_bulk_urb(ucs->bulk_out_urb, ucs->udev,
462 usb_sndbulkpipe(ucs->udev,
463 ucs->bulk_out_epnum),
464 cb->buf + cb->offset, count,
465 gigaset_write_bulk_callback, cs);
466
467 cb->offset += count;
468 cb->len -= count;
469 ucs->busy = 1;
470
471 spin_lock_irqsave(&cs->lock, flags);
472 status = cs->connected ?
473 usb_submit_urb(ucs->bulk_out_urb, GFP_ATOMIC) :
474 -ENODEV;
475 spin_unlock_irqrestore(&cs->lock, flags);
476
477 if (status) {
478 ucs->busy = 0;
479 dev_err(cs->dev,
480 "could not submit urb (error %d)\n",
481 -status);
482 cb->len = 0; /* skip urb => remove cb+wakeup
483 in next loop cycle */
484 }
485 }
486 } while (cb && status); /* next command on error */
487
488 return status;
489 }
490
491 /* Send command to device. */
gigaset_write_cmd(struct cardstate * cs,struct cmdbuf_t * cb)492 static int gigaset_write_cmd(struct cardstate *cs, struct cmdbuf_t *cb)
493 {
494 unsigned long flags;
495 int len;
496
497 gigaset_dbg_buffer(cs->mstate != MS_LOCKED ?
498 DEBUG_TRANSCMD : DEBUG_LOCKCMD,
499 "CMD Transmit", cb->len, cb->buf);
500
501 spin_lock_irqsave(&cs->cmdlock, flags);
502 cb->prev = cs->lastcmdbuf;
503 if (cs->lastcmdbuf)
504 cs->lastcmdbuf->next = cb;
505 else {
506 cs->cmdbuf = cb;
507 cs->curlen = cb->len;
508 }
509 cs->cmdbytes += cb->len;
510 cs->lastcmdbuf = cb;
511 spin_unlock_irqrestore(&cs->cmdlock, flags);
512
513 spin_lock_irqsave(&cs->lock, flags);
514 len = cb->len;
515 if (cs->connected)
516 tasklet_schedule(&cs->write_tasklet);
517 spin_unlock_irqrestore(&cs->lock, flags);
518 return len;
519 }
520
gigaset_write_room(struct cardstate * cs)521 static int gigaset_write_room(struct cardstate *cs)
522 {
523 unsigned bytes;
524
525 bytes = cs->cmdbytes;
526 return bytes < IF_WRITEBUF ? IF_WRITEBUF - bytes : 0;
527 }
528
gigaset_chars_in_buffer(struct cardstate * cs)529 static int gigaset_chars_in_buffer(struct cardstate *cs)
530 {
531 return cs->cmdbytes;
532 }
533
534 /*
535 * set the break characters on the internal serial adapter
536 * using undocumented device commands reverse engineered from USB traces
537 * of the Siemens Windows driver
538 */
gigaset_brkchars(struct cardstate * cs,const unsigned char buf[6])539 static int gigaset_brkchars(struct cardstate *cs, const unsigned char buf[6])
540 {
541 struct usb_device *udev = cs->hw.usb->udev;
542
543 gigaset_dbg_buffer(DEBUG_USBREQ, "brkchars", 6, buf);
544 memcpy(cs->hw.usb->bchars, buf, 6);
545 return usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x19, 0x41,
546 0, 0, &buf, 6, 2000);
547 }
548
gigaset_freebcshw(struct bc_state * bcs)549 static void gigaset_freebcshw(struct bc_state *bcs)
550 {
551 /* unused */
552 }
553
554 /* Initialize the b-channel structure */
gigaset_initbcshw(struct bc_state * bcs)555 static int gigaset_initbcshw(struct bc_state *bcs)
556 {
557 /* unused */
558 bcs->hw.usb = NULL;
559 return 0;
560 }
561
gigaset_reinitbcshw(struct bc_state * bcs)562 static void gigaset_reinitbcshw(struct bc_state *bcs)
563 {
564 /* nothing to do for M10x */
565 }
566
gigaset_freecshw(struct cardstate * cs)567 static void gigaset_freecshw(struct cardstate *cs)
568 {
569 tasklet_kill(&cs->write_tasklet);
570 kfree(cs->hw.usb);
571 }
572
gigaset_initcshw(struct cardstate * cs)573 static int gigaset_initcshw(struct cardstate *cs)
574 {
575 struct usb_cardstate *ucs;
576
577 cs->hw.usb = ucs =
578 kmalloc(sizeof(struct usb_cardstate), GFP_KERNEL);
579 if (!ucs) {
580 pr_err("out of memory\n");
581 return -ENOMEM;
582 }
583
584 ucs->bchars[0] = 0;
585 ucs->bchars[1] = 0;
586 ucs->bchars[2] = 0;
587 ucs->bchars[3] = 0;
588 ucs->bchars[4] = 0x11;
589 ucs->bchars[5] = 0x13;
590 ucs->bulk_out_buffer = NULL;
591 ucs->bulk_out_urb = NULL;
592 ucs->read_urb = NULL;
593 tasklet_init(&cs->write_tasklet,
594 gigaset_modem_fill, (unsigned long) cs);
595
596 return 0;
597 }
598
599 /* Send data from current skb to the device. */
write_modem(struct cardstate * cs)600 static int write_modem(struct cardstate *cs)
601 {
602 int ret = 0;
603 int count;
604 struct bc_state *bcs = &cs->bcs[0]; /* only one channel */
605 struct usb_cardstate *ucs = cs->hw.usb;
606 unsigned long flags;
607
608 gig_dbg(DEBUG_OUTPUT, "len: %d...", bcs->tx_skb->len);
609
610 if (!bcs->tx_skb->len) {
611 dev_kfree_skb_any(bcs->tx_skb);
612 bcs->tx_skb = NULL;
613 return -EINVAL;
614 }
615
616 /* Copy data to bulk out buffer and transmit data */
617 count = min(bcs->tx_skb->len, (unsigned) ucs->bulk_out_size);
618 skb_copy_from_linear_data(bcs->tx_skb, ucs->bulk_out_buffer, count);
619 skb_pull(bcs->tx_skb, count);
620 ucs->busy = 1;
621 gig_dbg(DEBUG_OUTPUT, "write_modem: send %d bytes", count);
622
623 spin_lock_irqsave(&cs->lock, flags);
624 if (cs->connected) {
625 usb_fill_bulk_urb(ucs->bulk_out_urb, ucs->udev,
626 usb_sndbulkpipe(ucs->udev,
627 ucs->bulk_out_epnum),
628 ucs->bulk_out_buffer, count,
629 gigaset_write_bulk_callback, cs);
630 ret = usb_submit_urb(ucs->bulk_out_urb, GFP_ATOMIC);
631 } else {
632 ret = -ENODEV;
633 }
634 spin_unlock_irqrestore(&cs->lock, flags);
635
636 if (ret) {
637 dev_err(cs->dev, "could not submit urb (error %d)\n", -ret);
638 ucs->busy = 0;
639 }
640
641 if (!bcs->tx_skb->len) {
642 /* skb sent completely */
643 gigaset_skb_sent(bcs, bcs->tx_skb);
644
645 gig_dbg(DEBUG_INTR, "kfree skb (Adr: %lx)!",
646 (unsigned long) bcs->tx_skb);
647 dev_kfree_skb_any(bcs->tx_skb);
648 bcs->tx_skb = NULL;
649 }
650
651 return ret;
652 }
653
gigaset_probe(struct usb_interface * interface,const struct usb_device_id * id)654 static int gigaset_probe(struct usb_interface *interface,
655 const struct usb_device_id *id)
656 {
657 int retval;
658 struct usb_device *udev = interface_to_usbdev(interface);
659 struct usb_host_interface *hostif = interface->cur_altsetting;
660 struct cardstate *cs = NULL;
661 struct usb_cardstate *ucs = NULL;
662 struct usb_endpoint_descriptor *endpoint;
663 int buffer_size;
664
665 gig_dbg(DEBUG_ANY, "%s: Check if device matches ...", __func__);
666
667 /* See if the device offered us matches what we can accept */
668 if ((le16_to_cpu(udev->descriptor.idVendor) != USB_M105_VENDOR_ID) ||
669 (le16_to_cpu(udev->descriptor.idProduct) != USB_M105_PRODUCT_ID)) {
670 gig_dbg(DEBUG_ANY, "device ID (0x%x, 0x%x) not for me - skip",
671 le16_to_cpu(udev->descriptor.idVendor),
672 le16_to_cpu(udev->descriptor.idProduct));
673 return -ENODEV;
674 }
675 if (hostif->desc.bInterfaceNumber != 0) {
676 gig_dbg(DEBUG_ANY, "interface %d not for me - skip",
677 hostif->desc.bInterfaceNumber);
678 return -ENODEV;
679 }
680 if (hostif->desc.bAlternateSetting != 0) {
681 dev_notice(&udev->dev, "unsupported altsetting %d - skip",
682 hostif->desc.bAlternateSetting);
683 return -ENODEV;
684 }
685 if (hostif->desc.bInterfaceClass != 255) {
686 dev_notice(&udev->dev, "unsupported interface class %d - skip",
687 hostif->desc.bInterfaceClass);
688 return -ENODEV;
689 }
690
691 dev_info(&udev->dev, "%s: Device matched ... !\n", __func__);
692
693 /* allocate memory for our device state and initialize it */
694 cs = gigaset_initcs(driver, 1, 1, 0, cidmode, GIGASET_MODULENAME);
695 if (!cs)
696 return -ENODEV;
697 ucs = cs->hw.usb;
698
699 /* save off device structure ptrs for later use */
700 usb_get_dev(udev);
701 ucs->udev = udev;
702 ucs->interface = interface;
703 cs->dev = &interface->dev;
704
705 /* save address of controller structure */
706 usb_set_intfdata(interface, cs);
707
708 endpoint = &hostif->endpoint[0].desc;
709
710 buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
711 ucs->bulk_out_size = buffer_size;
712 ucs->bulk_out_epnum = usb_endpoint_num(endpoint);
713 ucs->bulk_out_buffer = kmalloc(buffer_size, GFP_KERNEL);
714 if (!ucs->bulk_out_buffer) {
715 dev_err(cs->dev, "Couldn't allocate bulk_out_buffer\n");
716 retval = -ENOMEM;
717 goto error;
718 }
719
720 ucs->bulk_out_urb = usb_alloc_urb(0, GFP_KERNEL);
721 if (!ucs->bulk_out_urb) {
722 dev_err(cs->dev, "Couldn't allocate bulk_out_urb\n");
723 retval = -ENOMEM;
724 goto error;
725 }
726
727 endpoint = &hostif->endpoint[1].desc;
728
729 ucs->busy = 0;
730
731 ucs->read_urb = usb_alloc_urb(0, GFP_KERNEL);
732 if (!ucs->read_urb) {
733 dev_err(cs->dev, "No free urbs available\n");
734 retval = -ENOMEM;
735 goto error;
736 }
737 buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
738 ucs->rcvbuf_size = buffer_size;
739 ucs->rcvbuf = kmalloc(buffer_size, GFP_KERNEL);
740 if (!ucs->rcvbuf) {
741 dev_err(cs->dev, "Couldn't allocate rcvbuf\n");
742 retval = -ENOMEM;
743 goto error;
744 }
745 /* Fill the interrupt urb and send it to the core */
746 usb_fill_int_urb(ucs->read_urb, udev,
747 usb_rcvintpipe(udev, usb_endpoint_num(endpoint)),
748 ucs->rcvbuf, buffer_size,
749 gigaset_read_int_callback,
750 cs, endpoint->bInterval);
751
752 retval = usb_submit_urb(ucs->read_urb, GFP_KERNEL);
753 if (retval) {
754 dev_err(cs->dev, "Could not submit URB (error %d)\n", -retval);
755 goto error;
756 }
757
758 /* tell common part that the device is ready */
759 if (startmode == SM_LOCKED)
760 cs->mstate = MS_LOCKED;
761
762 retval = gigaset_start(cs);
763 if (retval < 0) {
764 tasklet_kill(&cs->write_tasklet);
765 goto error;
766 }
767 return 0;
768
769 error:
770 usb_kill_urb(ucs->read_urb);
771 kfree(ucs->bulk_out_buffer);
772 usb_free_urb(ucs->bulk_out_urb);
773 kfree(ucs->rcvbuf);
774 usb_free_urb(ucs->read_urb);
775 usb_set_intfdata(interface, NULL);
776 ucs->read_urb = ucs->bulk_out_urb = NULL;
777 ucs->rcvbuf = ucs->bulk_out_buffer = NULL;
778 usb_put_dev(ucs->udev);
779 ucs->udev = NULL;
780 ucs->interface = NULL;
781 gigaset_freecs(cs);
782 return retval;
783 }
784
gigaset_disconnect(struct usb_interface * interface)785 static void gigaset_disconnect(struct usb_interface *interface)
786 {
787 struct cardstate *cs;
788 struct usb_cardstate *ucs;
789
790 cs = usb_get_intfdata(interface);
791 ucs = cs->hw.usb;
792
793 dev_info(cs->dev, "disconnecting Gigaset USB adapter\n");
794
795 usb_kill_urb(ucs->read_urb);
796
797 gigaset_stop(cs);
798
799 usb_set_intfdata(interface, NULL);
800 tasklet_kill(&cs->write_tasklet);
801
802 usb_kill_urb(ucs->bulk_out_urb);
803
804 kfree(ucs->bulk_out_buffer);
805 usb_free_urb(ucs->bulk_out_urb);
806 kfree(ucs->rcvbuf);
807 usb_free_urb(ucs->read_urb);
808 ucs->read_urb = ucs->bulk_out_urb = NULL;
809 ucs->rcvbuf = ucs->bulk_out_buffer = NULL;
810
811 usb_put_dev(ucs->udev);
812 ucs->interface = NULL;
813 ucs->udev = NULL;
814 cs->dev = NULL;
815 gigaset_freecs(cs);
816 }
817
818 /* gigaset_suspend
819 * This function is called before the USB connection is suspended or reset.
820 */
gigaset_suspend(struct usb_interface * intf,pm_message_t message)821 static int gigaset_suspend(struct usb_interface *intf, pm_message_t message)
822 {
823 struct cardstate *cs = usb_get_intfdata(intf);
824
825 /* stop activity */
826 cs->connected = 0; /* prevent rescheduling */
827 usb_kill_urb(cs->hw.usb->read_urb);
828 tasklet_kill(&cs->write_tasklet);
829 usb_kill_urb(cs->hw.usb->bulk_out_urb);
830
831 gig_dbg(DEBUG_SUSPEND, "suspend complete");
832 return 0;
833 }
834
835 /* gigaset_resume
836 * This function is called after the USB connection has been resumed or reset.
837 */
gigaset_resume(struct usb_interface * intf)838 static int gigaset_resume(struct usb_interface *intf)
839 {
840 struct cardstate *cs = usb_get_intfdata(intf);
841 int rc;
842
843 /* resubmit interrupt URB */
844 cs->connected = 1;
845 rc = usb_submit_urb(cs->hw.usb->read_urb, GFP_KERNEL);
846 if (rc) {
847 dev_err(cs->dev, "Could not submit read URB (error %d)\n", -rc);
848 return rc;
849 }
850
851 gig_dbg(DEBUG_SUSPEND, "resume complete");
852 return 0;
853 }
854
855 /* gigaset_pre_reset
856 * This function is called before the USB connection is reset.
857 */
gigaset_pre_reset(struct usb_interface * intf)858 static int gigaset_pre_reset(struct usb_interface *intf)
859 {
860 /* same as suspend */
861 return gigaset_suspend(intf, PMSG_ON);
862 }
863
864 static const struct gigaset_ops ops = {
865 .write_cmd = gigaset_write_cmd,
866 .write_room = gigaset_write_room,
867 .chars_in_buffer = gigaset_chars_in_buffer,
868 .brkchars = gigaset_brkchars,
869 .init_bchannel = gigaset_init_bchannel,
870 .close_bchannel = gigaset_close_bchannel,
871 .initbcshw = gigaset_initbcshw,
872 .freebcshw = gigaset_freebcshw,
873 .reinitbcshw = gigaset_reinitbcshw,
874 .initcshw = gigaset_initcshw,
875 .freecshw = gigaset_freecshw,
876 .set_modem_ctrl = gigaset_set_modem_ctrl,
877 .baud_rate = gigaset_baud_rate,
878 .set_line_ctrl = gigaset_set_line_ctrl,
879 .send_skb = gigaset_m10x_send_skb,
880 .handle_input = gigaset_m10x_input,
881 };
882
883 /*
884 * This function is called while kernel-module is loaded
885 */
usb_gigaset_init(void)886 static int __init usb_gigaset_init(void)
887 {
888 int result;
889
890 /* allocate memory for our driver state and initialize it */
891 driver = gigaset_initdriver(GIGASET_MINOR, GIGASET_MINORS,
892 GIGASET_MODULENAME, GIGASET_DEVNAME,
893 &ops, THIS_MODULE);
894 if (driver == NULL) {
895 result = -ENOMEM;
896 goto error;
897 }
898
899 /* register this driver with the USB subsystem */
900 result = usb_register(&gigaset_usb_driver);
901 if (result < 0) {
902 pr_err("error %d registering USB driver\n", -result);
903 goto error;
904 }
905
906 pr_info(DRIVER_DESC "\n");
907 return 0;
908
909 error:
910 if (driver)
911 gigaset_freedriver(driver);
912 driver = NULL;
913 return result;
914 }
915
916 /*
917 * This function is called while unloading the kernel-module
918 */
usb_gigaset_exit(void)919 static void __exit usb_gigaset_exit(void)
920 {
921 int i;
922
923 gigaset_blockdriver(driver); /* => probe will fail
924 * => no gigaset_start any more
925 */
926
927 /* stop all connected devices */
928 for (i = 0; i < driver->minors; i++)
929 gigaset_shutdown(driver->cs + i);
930
931 /* from now on, no isdn callback should be possible */
932
933 /* deregister this driver with the USB subsystem */
934 usb_deregister(&gigaset_usb_driver);
935 /* this will call the disconnect-callback */
936 /* from now on, no disconnect/probe callback should be running */
937
938 gigaset_freedriver(driver);
939 driver = NULL;
940 }
941
942
943 module_init(usb_gigaset_init);
944 module_exit(usb_gigaset_exit);
945
946 MODULE_AUTHOR(DRIVER_AUTHOR);
947 MODULE_DESCRIPTION(DRIVER_DESC);
948
949 MODULE_LICENSE("GPL");
950
