Version:  2.0.40 2.2.26 2.4.37 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16

Linux/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 #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         __u8                    bulk_out_endpointAddr;
139         struct urb              *bulk_out_urb;
140 
141         /* Input buffer */
142         unsigned char           *rcvbuf;
143         int                     rcvbuf_size;
144         struct urb              *read_urb;
145         __u8                    int_in_endpointAddr;
146 
147         char                    bchars[6];              /* for request 0x19 */
148 };
149 
150 static inline unsigned tiocm_to_gigaset(unsigned state)
151 {
152         return ((state & TIOCM_DTR) ? 1 : 0) | ((state & TIOCM_RTS) ? 2 : 0);
153 }
154 
155 static int gigaset_set_modem_ctrl(struct cardstate *cs, unsigned old_state,
156                                   unsigned new_state)
157 {
158         struct usb_device *udev = cs->hw.usb->udev;
159         unsigned mask, val;
160         int r;
161 
162         mask = tiocm_to_gigaset(old_state ^ new_state);
163         val = tiocm_to_gigaset(new_state);
164 
165         gig_dbg(DEBUG_USBREQ, "set flags 0x%02x with mask 0x%02x", val, mask);
166         r = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 7, 0x41,
167                             (val & 0xff) | ((mask & 0xff) << 8), 0,
168                             NULL, 0, 2000 /* timeout? */);
169         if (r < 0)
170                 return r;
171         return 0;
172 }
173 
174 /*
175  * Set M105 configuration value
176  * using undocumented device commands reverse engineered from USB traces
177  * of the Siemens Windows driver
178  */
179 static int set_value(struct cardstate *cs, u8 req, u16 val)
180 {
181         struct usb_device *udev = cs->hw.usb->udev;
182         int r, r2;
183 
184         gig_dbg(DEBUG_USBREQ, "request %02x (%04x)",
185                 (unsigned)req, (unsigned)val);
186         r = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x12, 0x41,
187                             0xf /*?*/, 0, NULL, 0, 2000 /*?*/);
188         /* no idea what this does */
189         if (r < 0) {
190                 dev_err(&udev->dev, "error %d on request 0x12\n", -r);
191                 return r;
192         }
193 
194         r = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), req, 0x41,
195                             val, 0, NULL, 0, 2000 /*?*/);
196         if (r < 0)
197                 dev_err(&udev->dev, "error %d on request 0x%02x\n",
198                         -r, (unsigned)req);
199 
200         r2 = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x19, 0x41,
201                              0, 0, cs->hw.usb->bchars, 6, 2000 /*?*/);
202         if (r2 < 0)
203                 dev_err(&udev->dev, "error %d on request 0x19\n", -r2);
204 
205         return r < 0 ? r : (r2 < 0 ? r2 : 0);
206 }
207 
208 /*
209  * set the baud rate on the internal serial adapter
210  * using the undocumented parameter setting command
211  */
212 static int gigaset_baud_rate(struct cardstate *cs, unsigned cflag)
213 {
214         u16 val;
215         u32 rate;
216 
217         cflag &= CBAUD;
218 
219         switch (cflag) {
220         case    B300: rate =     300; break;
221         case    B600: rate =     600; break;
222         case   B1200: rate =    1200; break;
223         case   B2400: rate =    2400; break;
224         case   B4800: rate =    4800; break;
225         case   B9600: rate =    9600; break;
226         case  B19200: rate =   19200; break;
227         case  B38400: rate =   38400; break;
228         case  B57600: rate =   57600; break;
229         case B115200: rate =  115200; break;
230         default:
231                 rate =  9600;
232                 dev_err(cs->dev, "unsupported baudrate request 0x%x,"
233                         " using default of B9600\n", cflag);
234         }
235 
236         val = 0x383fff / rate + 1;
237 
238         return set_value(cs, 1, val);
239 }
240 
241 /*
242  * set the line format on the internal serial adapter
243  * using the undocumented parameter setting command
244  */
245 static int gigaset_set_line_ctrl(struct cardstate *cs, unsigned cflag)
246 {
247         u16 val = 0;
248 
249         /* set the parity */
250         if (cflag & PARENB)
251                 val |= (cflag & PARODD) ? 0x10 : 0x20;
252 
253         /* set the number of data bits */
254         switch (cflag & CSIZE) {
255         case CS5:
256                 val |= 5 << 8; break;
257         case CS6:
258                 val |= 6 << 8; break;
259         case CS7:
260                 val |= 7 << 8; break;
261         case CS8:
262                 val |= 8 << 8; break;
263         default:
264                 dev_err(cs->dev, "CSIZE was not CS5-CS8, using default of 8\n");
265                 val |= 8 << 8;
266                 break;
267         }
268 
269         /* set the number of stop bits */
270         if (cflag & CSTOPB) {
271                 if ((cflag & CSIZE) == CS5)
272                         val |= 1; /* 1.5 stop bits */
273                 else
274                         val |= 2; /* 2 stop bits */
275         }
276 
277         return set_value(cs, 3, val);
278 }
279 
280 
281 /*============================================================================*/
282 static int gigaset_init_bchannel(struct bc_state *bcs)
283 {
284         /* nothing to do for M10x */
285         gigaset_bchannel_up(bcs);
286         return 0;
287 }
288 
289 static int gigaset_close_bchannel(struct bc_state *bcs)
290 {
291         /* nothing to do for M10x */
292         gigaset_bchannel_down(bcs);
293         return 0;
294 }
295 
296 static int write_modem(struct cardstate *cs);
297 static int send_cb(struct cardstate *cs, struct cmdbuf_t *cb);
298 
299 
300 /* Write tasklet handler: Continue sending current skb, or send command, or
301  * start sending an skb from the send queue.
302  */
303 static void gigaset_modem_fill(unsigned long data)
304 {
305         struct cardstate *cs = (struct cardstate *) data;
306         struct bc_state *bcs = &cs->bcs[0]; /* only one channel */
307         struct cmdbuf_t *cb;
308         int again;
309 
310         gig_dbg(DEBUG_OUTPUT, "modem_fill");
311 
312         if (cs->hw.usb->busy) {
313                 gig_dbg(DEBUG_OUTPUT, "modem_fill: busy");
314                 return;
315         }
316 
317         do {
318                 again = 0;
319                 if (!bcs->tx_skb) { /* no skb is being sent */
320                         cb = cs->cmdbuf;
321                         if (cb) { /* commands to send? */
322                                 gig_dbg(DEBUG_OUTPUT, "modem_fill: cb");
323                                 if (send_cb(cs, cb) < 0) {
324                                         gig_dbg(DEBUG_OUTPUT,
325                                                 "modem_fill: send_cb failed");
326                                         again = 1; /* no callback will be
327                                                       called! */
328                                 }
329                         } else { /* skbs to send? */
330                                 bcs->tx_skb = skb_dequeue(&bcs->squeue);
331                                 if (bcs->tx_skb)
332                                         gig_dbg(DEBUG_INTR,
333                                                 "Dequeued skb (Adr: %lx)!",
334                                                 (unsigned long) bcs->tx_skb);
335                         }
336                 }
337 
338                 if (bcs->tx_skb) {
339                         gig_dbg(DEBUG_OUTPUT, "modem_fill: tx_skb");
340                         if (write_modem(cs) < 0) {
341                                 gig_dbg(DEBUG_OUTPUT,
342                                         "modem_fill: write_modem failed");
343                                 again = 1; /* no callback will be called! */
344                         }
345                 }
346         } while (again);
347 }
348 
349 /*
350  * Interrupt Input URB completion routine
351  */
352 static void gigaset_read_int_callback(struct urb *urb)
353 {
354         struct cardstate *cs = urb->context;
355         struct inbuf_t *inbuf = cs->inbuf;
356         int status = urb->status;
357         int r;
358         unsigned numbytes;
359         unsigned char *src;
360         unsigned long flags;
361 
362         if (!status) {
363                 numbytes = urb->actual_length;
364 
365                 if (numbytes) {
366                         src = cs->hw.usb->rcvbuf;
367                         if (unlikely(*src))
368                                 dev_warn(cs->dev,
369                                          "%s: There was no leading 0, but 0x%02x!\n",
370                                          __func__, (unsigned) *src);
371                         ++src; /* skip leading 0x00 */
372                         --numbytes;
373                         if (gigaset_fill_inbuf(inbuf, src, numbytes)) {
374                                 gig_dbg(DEBUG_INTR, "%s-->BH", __func__);
375                                 gigaset_schedule_event(inbuf->cs);
376                         }
377                 } else
378                         gig_dbg(DEBUG_INTR, "Received zero block length");
379         } else {
380                 /* The urb might have been killed. */
381                 gig_dbg(DEBUG_ANY, "%s - nonzero status received: %d",
382                         __func__, status);
383                 if (status == -ENOENT || status == -ESHUTDOWN)
384                         /* killed or endpoint shutdown: don't resubmit */
385                         return;
386         }
387 
388         /* resubmit URB */
389         spin_lock_irqsave(&cs->lock, flags);
390         if (!cs->connected) {
391                 spin_unlock_irqrestore(&cs->lock, flags);
392                 pr_err("%s: disconnected\n", __func__);
393                 return;
394         }
395         r = usb_submit_urb(urb, GFP_ATOMIC);
396         spin_unlock_irqrestore(&cs->lock, flags);
397         if (r)
398                 dev_err(cs->dev, "error %d resubmitting URB\n", -r);
399 }
400 
401 
402 /* This callback routine is called when data was transmitted to the device. */
403 static void gigaset_write_bulk_callback(struct urb *urb)
404 {
405         struct cardstate *cs = urb->context;
406         int status = urb->status;
407         unsigned long flags;
408 
409         switch (status) {
410         case 0:                 /* normal completion */
411                 break;
412         case -ENOENT:           /* killed */
413                 gig_dbg(DEBUG_ANY, "%s: killed", __func__);
414                 cs->hw.usb->busy = 0;
415                 return;
416         default:
417                 dev_err(cs->dev, "bulk transfer failed (status %d)\n",
418                         -status);
419                 /* That's all we can do. Communication problems
420                    are handled by timeouts or network protocols. */
421         }
422 
423         spin_lock_irqsave(&cs->lock, flags);
424         if (!cs->connected) {
425                 pr_err("%s: disconnected\n", __func__);
426         } else {
427                 cs->hw.usb->busy = 0;
428                 tasklet_schedule(&cs->write_tasklet);
429         }
430         spin_unlock_irqrestore(&cs->lock, flags);
431 }
432 
433 static int send_cb(struct cardstate *cs, struct cmdbuf_t *cb)
434 {
435         struct cmdbuf_t *tcb;
436         unsigned long flags;
437         int count;
438         int status = -ENOENT;
439         struct usb_cardstate *ucs = cs->hw.usb;
440 
441         do {
442                 if (!cb->len) {
443                         tcb = cb;
444 
445                         spin_lock_irqsave(&cs->cmdlock, flags);
446                         cs->cmdbytes -= cs->curlen;
447                         gig_dbg(DEBUG_OUTPUT, "send_cb: sent %u bytes, %u left",
448                                 cs->curlen, cs->cmdbytes);
449                         cs->cmdbuf = cb = cb->next;
450                         if (cb) {
451                                 cb->prev = NULL;
452                                 cs->curlen = cb->len;
453                         } else {
454                                 cs->lastcmdbuf = NULL;
455                                 cs->curlen = 0;
456                         }
457                         spin_unlock_irqrestore(&cs->cmdlock, flags);
458 
459                         if (tcb->wake_tasklet)
460                                 tasklet_schedule(tcb->wake_tasklet);
461                         kfree(tcb);
462                 }
463                 if (cb) {
464                         count = min(cb->len, ucs->bulk_out_size);
465                         gig_dbg(DEBUG_OUTPUT, "send_cb: send %d bytes", count);
466 
467                         usb_fill_bulk_urb(ucs->bulk_out_urb, ucs->udev,
468                                           usb_sndbulkpipe(ucs->udev,
469                                                           ucs->bulk_out_endpointAddr & 0x0f),
470                                           cb->buf + cb->offset, count,
471                                           gigaset_write_bulk_callback, cs);
472 
473                         cb->offset += count;
474                         cb->len -= count;
475                         ucs->busy = 1;
476 
477                         spin_lock_irqsave(&cs->lock, flags);
478                         status = cs->connected ?
479                                 usb_submit_urb(ucs->bulk_out_urb, GFP_ATOMIC) :
480                                 -ENODEV;
481                         spin_unlock_irqrestore(&cs->lock, flags);
482 
483                         if (status) {
484                                 ucs->busy = 0;
485                                 dev_err(cs->dev,
486                                         "could not submit urb (error %d)\n",
487                                         -status);
488                                 cb->len = 0; /* skip urb => remove cb+wakeup
489                                                 in next loop cycle */
490                         }
491                 }
492         } while (cb && status); /* next command on error */
493 
494         return status;
495 }
496 
497 /* Send command to device. */
498 static int gigaset_write_cmd(struct cardstate *cs, struct cmdbuf_t *cb)
499 {
500         unsigned long flags;
501 
502         gigaset_dbg_buffer(cs->mstate != MS_LOCKED ?
503                            DEBUG_TRANSCMD : DEBUG_LOCKCMD,
504                            "CMD Transmit", cb->len, cb->buf);
505 
506         spin_lock_irqsave(&cs->cmdlock, flags);
507         cb->prev = cs->lastcmdbuf;
508         if (cs->lastcmdbuf)
509                 cs->lastcmdbuf->next = cb;
510         else {
511                 cs->cmdbuf = cb;
512                 cs->curlen = cb->len;
513         }
514         cs->cmdbytes += cb->len;
515         cs->lastcmdbuf = cb;
516         spin_unlock_irqrestore(&cs->cmdlock, flags);
517 
518         spin_lock_irqsave(&cs->lock, flags);
519         if (cs->connected)
520                 tasklet_schedule(&cs->write_tasklet);
521         spin_unlock_irqrestore(&cs->lock, flags);
522         return cb->len;
523 }
524 
525 static int gigaset_write_room(struct cardstate *cs)
526 {
527         unsigned bytes;
528 
529         bytes = cs->cmdbytes;
530         return bytes < IF_WRITEBUF ? IF_WRITEBUF - bytes : 0;
531 }
532 
533 static int gigaset_chars_in_buffer(struct cardstate *cs)
534 {
535         return cs->cmdbytes;
536 }
537 
538 /*
539  * set the break characters on the internal serial adapter
540  * using undocumented device commands reverse engineered from USB traces
541  * of the Siemens Windows driver
542  */
543 static int gigaset_brkchars(struct cardstate *cs, const unsigned char buf[6])
544 {
545         struct usb_device *udev = cs->hw.usb->udev;
546 
547         gigaset_dbg_buffer(DEBUG_USBREQ, "brkchars", 6, buf);
548         memcpy(cs->hw.usb->bchars, buf, 6);
549         return usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x19, 0x41,
550                                0, 0, &buf, 6, 2000);
551 }
552 
553 static void gigaset_freebcshw(struct bc_state *bcs)
554 {
555         /* unused */
556 }
557 
558 /* Initialize the b-channel structure */
559 static int gigaset_initbcshw(struct bc_state *bcs)
560 {
561         /* unused */
562         bcs->hw.usb = NULL;
563         return 0;
564 }
565 
566 static void gigaset_reinitbcshw(struct bc_state *bcs)
567 {
568         /* nothing to do for M10x */
569 }
570 
571 static void gigaset_freecshw(struct cardstate *cs)
572 {
573         tasklet_kill(&cs->write_tasklet);
574         kfree(cs->hw.usb);
575 }
576 
577 static int gigaset_initcshw(struct cardstate *cs)
578 {
579         struct usb_cardstate *ucs;
580 
581         cs->hw.usb = ucs =
582                 kmalloc(sizeof(struct usb_cardstate), GFP_KERNEL);
583         if (!ucs) {
584                 pr_err("out of memory\n");
585                 return -ENOMEM;
586         }
587 
588         ucs->bchars[0] = 0;
589         ucs->bchars[1] = 0;
590         ucs->bchars[2] = 0;
591         ucs->bchars[3] = 0;
592         ucs->bchars[4] = 0x11;
593         ucs->bchars[5] = 0x13;
594         ucs->bulk_out_buffer = NULL;
595         ucs->bulk_out_urb = NULL;
596         ucs->read_urb = NULL;
597         tasklet_init(&cs->write_tasklet,
598                      gigaset_modem_fill, (unsigned long) cs);
599 
600         return 0;
601 }
602 
603 /* Send data from current skb to the device. */
604 static int write_modem(struct cardstate *cs)
605 {
606         int ret = 0;
607         int count;
608         struct bc_state *bcs = &cs->bcs[0]; /* only one channel */
609         struct usb_cardstate *ucs = cs->hw.usb;
610         unsigned long flags;
611 
612         gig_dbg(DEBUG_OUTPUT, "len: %d...", bcs->tx_skb->len);
613 
614         if (!bcs->tx_skb->len) {
615                 dev_kfree_skb_any(bcs->tx_skb);
616                 bcs->tx_skb = NULL;
617                 return -EINVAL;
618         }
619 
620         /* Copy data to bulk out buffer and transmit data */
621         count = min(bcs->tx_skb->len, (unsigned) ucs->bulk_out_size);
622         skb_copy_from_linear_data(bcs->tx_skb, ucs->bulk_out_buffer, count);
623         skb_pull(bcs->tx_skb, count);
624         ucs->busy = 1;
625         gig_dbg(DEBUG_OUTPUT, "write_modem: send %d bytes", count);
626 
627         spin_lock_irqsave(&cs->lock, flags);
628         if (cs->connected) {
629                 usb_fill_bulk_urb(ucs->bulk_out_urb, ucs->udev,
630                                   usb_sndbulkpipe(ucs->udev,
631                                                   ucs->bulk_out_endpointAddr &
632                                                   0x0f),
633                                   ucs->bulk_out_buffer, count,
634                                   gigaset_write_bulk_callback, cs);
635                 ret = usb_submit_urb(ucs->bulk_out_urb, GFP_ATOMIC);
636         } else {
637                 ret = -ENODEV;
638         }
639         spin_unlock_irqrestore(&cs->lock, flags);
640 
641         if (ret) {
642                 dev_err(cs->dev, "could not submit urb (error %d)\n", -ret);
643                 ucs->busy = 0;
644         }
645 
646         if (!bcs->tx_skb->len) {
647                 /* skb sent completely */
648                 gigaset_skb_sent(bcs, bcs->tx_skb);
649 
650                 gig_dbg(DEBUG_INTR, "kfree skb (Adr: %lx)!",
651                         (unsigned long) bcs->tx_skb);
652                 dev_kfree_skb_any(bcs->tx_skb);
653                 bcs->tx_skb = NULL;
654         }
655 
656         return ret;
657 }
658 
659 static int gigaset_probe(struct usb_interface *interface,
660                          const struct usb_device_id *id)
661 {
662         int retval;
663         struct usb_device *udev = interface_to_usbdev(interface);
664         struct usb_host_interface *hostif = interface->cur_altsetting;
665         struct cardstate *cs = NULL;
666         struct usb_cardstate *ucs = NULL;
667         struct usb_endpoint_descriptor *endpoint;
668         int buffer_size;
669 
670         gig_dbg(DEBUG_ANY, "%s: Check if device matches ...", __func__);
671 
672         /* See if the device offered us matches what we can accept */
673         if ((le16_to_cpu(udev->descriptor.idVendor)  != USB_M105_VENDOR_ID) ||
674             (le16_to_cpu(udev->descriptor.idProduct) != USB_M105_PRODUCT_ID)) {
675                 gig_dbg(DEBUG_ANY, "device ID (0x%x, 0x%x) not for me - skip",
676                         le16_to_cpu(udev->descriptor.idVendor),
677                         le16_to_cpu(udev->descriptor.idProduct));
678                 return -ENODEV;
679         }
680         if (hostif->desc.bInterfaceNumber != 0) {
681                 gig_dbg(DEBUG_ANY, "interface %d not for me - skip",
682                         hostif->desc.bInterfaceNumber);
683                 return -ENODEV;
684         }
685         if (hostif->desc.bAlternateSetting != 0) {
686                 dev_notice(&udev->dev, "unsupported altsetting %d - skip",
687                            hostif->desc.bAlternateSetting);
688                 return -ENODEV;
689         }
690         if (hostif->desc.bInterfaceClass != 255) {
691                 dev_notice(&udev->dev, "unsupported interface class %d - skip",
692                            hostif->desc.bInterfaceClass);
693                 return -ENODEV;
694         }
695 
696         dev_info(&udev->dev, "%s: Device matched ... !\n", __func__);
697 
698         /* allocate memory for our device state and initialize it */
699         cs = gigaset_initcs(driver, 1, 1, 0, cidmode, GIGASET_MODULENAME);
700         if (!cs)
701                 return -ENODEV;
702         ucs = cs->hw.usb;
703 
704         /* save off device structure ptrs for later use */
705         usb_get_dev(udev);
706         ucs->udev = udev;
707         ucs->interface = interface;
708         cs->dev = &interface->dev;
709 
710         /* save address of controller structure */
711         usb_set_intfdata(interface, cs);
712 
713         endpoint = &hostif->endpoint[0].desc;
714 
715         buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
716         ucs->bulk_out_size = buffer_size;
717         ucs->bulk_out_endpointAddr = endpoint->bEndpointAddress;
718         ucs->bulk_out_buffer = kmalloc(buffer_size, GFP_KERNEL);
719         if (!ucs->bulk_out_buffer) {
720                 dev_err(cs->dev, "Couldn't allocate bulk_out_buffer\n");
721                 retval = -ENOMEM;
722                 goto error;
723         }
724 
725         ucs->bulk_out_urb = usb_alloc_urb(0, GFP_KERNEL);
726         if (!ucs->bulk_out_urb) {
727                 dev_err(cs->dev, "Couldn't allocate bulk_out_urb\n");
728                 retval = -ENOMEM;
729                 goto error;
730         }
731 
732         endpoint = &hostif->endpoint[1].desc;
733 
734         ucs->busy = 0;
735 
736         ucs->read_urb = usb_alloc_urb(0, GFP_KERNEL);
737         if (!ucs->read_urb) {
738                 dev_err(cs->dev, "No free urbs available\n");
739                 retval = -ENOMEM;
740                 goto error;
741         }
742         buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
743         ucs->rcvbuf_size = buffer_size;
744         ucs->int_in_endpointAddr = endpoint->bEndpointAddress;
745         ucs->rcvbuf = kmalloc(buffer_size, GFP_KERNEL);
746         if (!ucs->rcvbuf) {
747                 dev_err(cs->dev, "Couldn't allocate rcvbuf\n");
748                 retval = -ENOMEM;
749                 goto error;
750         }
751         /* Fill the interrupt urb and send it to the core */
752         usb_fill_int_urb(ucs->read_urb, udev,
753                          usb_rcvintpipe(udev,
754                                         endpoint->bEndpointAddress & 0x0f),
755                          ucs->rcvbuf, buffer_size,
756                          gigaset_read_int_callback,
757                          cs, endpoint->bInterval);
758 
759         retval = usb_submit_urb(ucs->read_urb, GFP_KERNEL);
760         if (retval) {
761                 dev_err(cs->dev, "Could not submit URB (error %d)\n", -retval);
762                 goto error;
763         }
764 
765         /* tell common part that the device is ready */
766         if (startmode == SM_LOCKED)
767                 cs->mstate = MS_LOCKED;
768 
769         retval = gigaset_start(cs);
770         if (retval < 0) {
771                 tasklet_kill(&cs->write_tasklet);
772                 goto error;
773         }
774         return 0;
775 
776 error:
777         usb_kill_urb(ucs->read_urb);
778         kfree(ucs->bulk_out_buffer);
779         usb_free_urb(ucs->bulk_out_urb);
780         kfree(ucs->rcvbuf);
781         usb_free_urb(ucs->read_urb);
782         usb_set_intfdata(interface, NULL);
783         ucs->read_urb = ucs->bulk_out_urb = NULL;
784         ucs->rcvbuf = ucs->bulk_out_buffer = NULL;
785         usb_put_dev(ucs->udev);
786         ucs->udev = NULL;
787         ucs->interface = NULL;
788         gigaset_freecs(cs);
789         return retval;
790 }
791 
792 static void gigaset_disconnect(struct usb_interface *interface)
793 {
794         struct cardstate *cs;
795         struct usb_cardstate *ucs;
796 
797         cs = usb_get_intfdata(interface);
798         ucs = cs->hw.usb;
799 
800         dev_info(cs->dev, "disconnecting Gigaset USB adapter\n");
801 
802         usb_kill_urb(ucs->read_urb);
803 
804         gigaset_stop(cs);
805 
806         usb_set_intfdata(interface, NULL);
807         tasklet_kill(&cs->write_tasklet);
808 
809         usb_kill_urb(ucs->bulk_out_urb);
810 
811         kfree(ucs->bulk_out_buffer);
812         usb_free_urb(ucs->bulk_out_urb);
813         kfree(ucs->rcvbuf);
814         usb_free_urb(ucs->read_urb);
815         ucs->read_urb = ucs->bulk_out_urb = NULL;
816         ucs->rcvbuf = ucs->bulk_out_buffer = NULL;
817 
818         usb_put_dev(ucs->udev);
819         ucs->interface = NULL;
820         ucs->udev = NULL;
821         cs->dev = NULL;
822         gigaset_freecs(cs);
823 }
824 
825 /* gigaset_suspend
826  * This function is called before the USB connection is suspended or reset.
827  */
828 static int gigaset_suspend(struct usb_interface *intf, pm_message_t message)
829 {
830         struct cardstate *cs = usb_get_intfdata(intf);
831 
832         /* stop activity */
833         cs->connected = 0;      /* prevent rescheduling */
834         usb_kill_urb(cs->hw.usb->read_urb);
835         tasklet_kill(&cs->write_tasklet);
836         usb_kill_urb(cs->hw.usb->bulk_out_urb);
837 
838         gig_dbg(DEBUG_SUSPEND, "suspend complete");
839         return 0;
840 }
841 
842 /* gigaset_resume
843  * This function is called after the USB connection has been resumed or reset.
844  */
845 static int gigaset_resume(struct usb_interface *intf)
846 {
847         struct cardstate *cs = usb_get_intfdata(intf);
848         int rc;
849 
850         /* resubmit interrupt URB */
851         cs->connected = 1;
852         rc = usb_submit_urb(cs->hw.usb->read_urb, GFP_KERNEL);
853         if (rc) {
854                 dev_err(cs->dev, "Could not submit read URB (error %d)\n", -rc);
855                 return rc;
856         }
857 
858         gig_dbg(DEBUG_SUSPEND, "resume complete");
859         return 0;
860 }
861 
862 /* gigaset_pre_reset
863  * This function is called before the USB connection is reset.
864  */
865 static int gigaset_pre_reset(struct usb_interface *intf)
866 {
867         /* same as suspend */
868         return gigaset_suspend(intf, PMSG_ON);
869 }
870 
871 static const struct gigaset_ops ops = {
872         gigaset_write_cmd,
873         gigaset_write_room,
874         gigaset_chars_in_buffer,
875         gigaset_brkchars,
876         gigaset_init_bchannel,
877         gigaset_close_bchannel,
878         gigaset_initbcshw,
879         gigaset_freebcshw,
880         gigaset_reinitbcshw,
881         gigaset_initcshw,
882         gigaset_freecshw,
883         gigaset_set_modem_ctrl,
884         gigaset_baud_rate,
885         gigaset_set_line_ctrl,
886         gigaset_m10x_send_skb,
887         gigaset_m10x_input,
888 };
889 
890 /*
891  * This function is called while kernel-module is loaded
892  */
893 static int __init usb_gigaset_init(void)
894 {
895         int result;
896 
897         /* allocate memory for our driver state and initialize it */
898         driver = gigaset_initdriver(GIGASET_MINOR, GIGASET_MINORS,
899                                     GIGASET_MODULENAME, GIGASET_DEVNAME,
900                                     &ops, THIS_MODULE);
901         if (driver == NULL) {
902                 result = -ENOMEM;
903                 goto error;
904         }
905 
906         /* register this driver with the USB subsystem */
907         result = usb_register(&gigaset_usb_driver);
908         if (result < 0) {
909                 pr_err("error %d registering USB driver\n", -result);
910                 goto error;
911         }
912 
913         pr_info(DRIVER_DESC "\n");
914         return 0;
915 
916 error:
917         if (driver)
918                 gigaset_freedriver(driver);
919         driver = NULL;
920         return result;
921 }
922 
923 /*
924  * This function is called while unloading the kernel-module
925  */
926 static void __exit usb_gigaset_exit(void)
927 {
928         int i;
929 
930         gigaset_blockdriver(driver); /* => probe will fail
931                                       * => no gigaset_start any more
932                                       */
933 
934         /* stop all connected devices */
935         for (i = 0; i < driver->minors; i++)
936                 gigaset_shutdown(driver->cs + i);
937 
938         /* from now on, no isdn callback should be possible */
939 
940         /* deregister this driver with the USB subsystem */
941         usb_deregister(&gigaset_usb_driver);
942         /* this will call the disconnect-callback */
943         /* from now on, no disconnect/probe callback should be running */
944 
945         gigaset_freedriver(driver);
946         driver = NULL;
947 }
948 
949 
950 module_init(usb_gigaset_init);
951 module_exit(usb_gigaset_exit);
952 
953 MODULE_AUTHOR(DRIVER_AUTHOR);
954 MODULE_DESCRIPTION(DRIVER_DESC);
955 
956 MODULE_LICENSE("GPL");
957 

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