Version:  2.0.40 2.2.26 2.4.37 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 3.17 3.18

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         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 
149 static inline unsigned tiocm_to_gigaset(unsigned state)
150 {
151         return ((state & TIOCM_DTR) ? 1 : 0) | ((state & TIOCM_RTS) ? 2 : 0);
152 }
153 
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  */
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  */
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  */
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 /*============================================================================*/
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 
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, struct cmdbuf_t *cb);
297 
298 
299 /* Write tasklet handler: Continue sending current skb, or send command, or
300  * start sending an skb from the send queue.
301  */
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         struct cmdbuf_t *cb;
307         int again;
308 
309         gig_dbg(DEBUG_OUTPUT, "modem_fill");
310 
311         if (cs->hw.usb->busy) {
312                 gig_dbg(DEBUG_OUTPUT, "modem_fill: busy");
313                 return;
314         }
315 
316         do {
317                 again = 0;
318                 if (!bcs->tx_skb) { /* no skb is being sent */
319                         cb = cs->cmdbuf;
320                         if (cb) { /* commands to send? */
321                                 gig_dbg(DEBUG_OUTPUT, "modem_fill: cb");
322                                 if (send_cb(cs, cb) < 0) {
323                                         gig_dbg(DEBUG_OUTPUT,
324                                                 "modem_fill: send_cb failed");
325                                         again = 1; /* no callback will be
326                                                       called! */
327                                 }
328                         } else { /* skbs to send? */
329                                 bcs->tx_skb = skb_dequeue(&bcs->squeue);
330                                 if (bcs->tx_skb)
331                                         gig_dbg(DEBUG_INTR,
332                                                 "Dequeued skb (Adr: %lx)!",
333                                                 (unsigned long) bcs->tx_skb);
334                         }
335                 }
336 
337                 if (bcs->tx_skb) {
338                         gig_dbg(DEBUG_OUTPUT, "modem_fill: tx_skb");
339                         if (write_modem(cs) < 0) {
340                                 gig_dbg(DEBUG_OUTPUT,
341                                         "modem_fill: write_modem failed");
342                                 again = 1; /* no callback will be called! */
343                         }
344                 }
345         } while (again);
346 }
347 
348 /*
349  * Interrupt Input URB completion routine
350  */
351 static void gigaset_read_int_callback(struct urb *urb)
352 {
353         struct cardstate *cs = urb->context;
354         struct inbuf_t *inbuf = cs->inbuf;
355         int status = urb->status;
356         int r;
357         unsigned numbytes;
358         unsigned char *src;
359         unsigned long flags;
360 
361         if (!status) {
362                 numbytes = urb->actual_length;
363 
364                 if (numbytes) {
365                         src = cs->hw.usb->rcvbuf;
366                         if (unlikely(*src))
367                                 dev_warn(cs->dev,
368                                          "%s: There was no leading 0, but 0x%02x!\n",
369                                          __func__, (unsigned) *src);
370                         ++src; /* skip leading 0x00 */
371                         --numbytes;
372                         if (gigaset_fill_inbuf(inbuf, src, numbytes)) {
373                                 gig_dbg(DEBUG_INTR, "%s-->BH", __func__);
374                                 gigaset_schedule_event(inbuf->cs);
375                         }
376                 } else
377                         gig_dbg(DEBUG_INTR, "Received zero block length");
378         } else {
379                 /* The urb might have been killed. */
380                 gig_dbg(DEBUG_ANY, "%s - nonzero status received: %d",
381                         __func__, status);
382                 if (status == -ENOENT || status == -ESHUTDOWN)
383                         /* killed or endpoint shutdown: don't resubmit */
384                         return;
385         }
386 
387         /* resubmit URB */
388         spin_lock_irqsave(&cs->lock, flags);
389         if (!cs->connected) {
390                 spin_unlock_irqrestore(&cs->lock, flags);
391                 pr_err("%s: disconnected\n", __func__);
392                 return;
393         }
394         r = usb_submit_urb(urb, GFP_ATOMIC);
395         spin_unlock_irqrestore(&cs->lock, flags);
396         if (r)
397                 dev_err(cs->dev, "error %d resubmitting URB\n", -r);
398 }
399 
400 
401 /* This callback routine is called when data was transmitted to the device. */
402 static void gigaset_write_bulk_callback(struct urb *urb)
403 {
404         struct cardstate *cs = urb->context;
405         int status = urb->status;
406         unsigned long flags;
407 
408         switch (status) {
409         case 0:                 /* normal completion */
410                 break;
411         case -ENOENT:           /* killed */
412                 gig_dbg(DEBUG_ANY, "%s: killed", __func__);
413                 cs->hw.usb->busy = 0;
414                 return;
415         default:
416                 dev_err(cs->dev, "bulk transfer failed (status %d)\n",
417                         -status);
418                 /* That's all we can do. Communication problems
419                    are handled by timeouts or network protocols. */
420         }
421 
422         spin_lock_irqsave(&cs->lock, flags);
423         if (!cs->connected) {
424                 pr_err("%s: disconnected\n", __func__);
425         } else {
426                 cs->hw.usb->busy = 0;
427                 tasklet_schedule(&cs->write_tasklet);
428         }
429         spin_unlock_irqrestore(&cs->lock, flags);
430 }
431 
432 static int send_cb(struct cardstate *cs, struct cmdbuf_t *cb)
433 {
434         struct cmdbuf_t *tcb;
435         unsigned long flags;
436         int count;
437         int status = -ENOENT;
438         struct usb_cardstate *ucs = cs->hw.usb;
439 
440         do {
441                 if (!cb->len) {
442                         tcb = cb;
443 
444                         spin_lock_irqsave(&cs->cmdlock, flags);
445                         cs->cmdbytes -= cs->curlen;
446                         gig_dbg(DEBUG_OUTPUT, "send_cb: sent %u bytes, %u left",
447                                 cs->curlen, cs->cmdbytes);
448                         cs->cmdbuf = cb = cb->next;
449                         if (cb) {
450                                 cb->prev = NULL;
451                                 cs->curlen = cb->len;
452                         } else {
453                                 cs->lastcmdbuf = NULL;
454                                 cs->curlen = 0;
455                         }
456                         spin_unlock_irqrestore(&cs->cmdlock, flags);
457 
458                         if (tcb->wake_tasklet)
459                                 tasklet_schedule(tcb->wake_tasklet);
460                         kfree(tcb);
461                 }
462                 if (cb) {
463                         count = min(cb->len, ucs->bulk_out_size);
464                         gig_dbg(DEBUG_OUTPUT, "send_cb: send %d bytes", count);
465 
466                         usb_fill_bulk_urb(ucs->bulk_out_urb, ucs->udev,
467                                           usb_sndbulkpipe(ucs->udev,
468                                                           ucs->bulk_out_epnum),
469                                           cb->buf + cb->offset, count,
470                                           gigaset_write_bulk_callback, cs);
471 
472                         cb->offset += count;
473                         cb->len -= count;
474                         ucs->busy = 1;
475 
476                         spin_lock_irqsave(&cs->lock, flags);
477                         status = cs->connected ?
478                                 usb_submit_urb(ucs->bulk_out_urb, GFP_ATOMIC) :
479                                 -ENODEV;
480                         spin_unlock_irqrestore(&cs->lock, flags);
481 
482                         if (status) {
483                                 ucs->busy = 0;
484                                 dev_err(cs->dev,
485                                         "could not submit urb (error %d)\n",
486                                         -status);
487                                 cb->len = 0; /* skip urb => remove cb+wakeup
488                                                 in next loop cycle */
489                         }
490                 }
491         } while (cb && status); /* next command on error */
492 
493         return status;
494 }
495 
496 /* Send command to device. */
497 static int gigaset_write_cmd(struct cardstate *cs, struct cmdbuf_t *cb)
498 {
499         unsigned long flags;
500         int len;
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         len = cb->len;
520         if (cs->connected)
521                 tasklet_schedule(&cs->write_tasklet);
522         spin_unlock_irqrestore(&cs->lock, flags);
523         return len;
524 }
525 
526 static int gigaset_write_room(struct cardstate *cs)
527 {
528         unsigned bytes;
529 
530         bytes = cs->cmdbytes;
531         return bytes < IF_WRITEBUF ? IF_WRITEBUF - bytes : 0;
532 }
533 
534 static int gigaset_chars_in_buffer(struct cardstate *cs)
535 {
536         return cs->cmdbytes;
537 }
538 
539 /*
540  * set the break characters on the internal serial adapter
541  * using undocumented device commands reverse engineered from USB traces
542  * of the Siemens Windows driver
543  */
544 static int gigaset_brkchars(struct cardstate *cs, const unsigned char buf[6])
545 {
546         struct usb_device *udev = cs->hw.usb->udev;
547 
548         gigaset_dbg_buffer(DEBUG_USBREQ, "brkchars", 6, buf);
549         memcpy(cs->hw.usb->bchars, buf, 6);
550         return usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x19, 0x41,
551                                0, 0, &buf, 6, 2000);
552 }
553 
554 static void gigaset_freebcshw(struct bc_state *bcs)
555 {
556         /* unused */
557 }
558 
559 /* Initialize the b-channel structure */
560 static int gigaset_initbcshw(struct bc_state *bcs)
561 {
562         /* unused */
563         bcs->hw.usb = NULL;
564         return 0;
565 }
566 
567 static void gigaset_reinitbcshw(struct bc_state *bcs)
568 {
569         /* nothing to do for M10x */
570 }
571 
572 static void gigaset_freecshw(struct cardstate *cs)
573 {
574         tasklet_kill(&cs->write_tasklet);
575         kfree(cs->hw.usb);
576 }
577 
578 static int gigaset_initcshw(struct cardstate *cs)
579 {
580         struct usb_cardstate *ucs;
581 
582         cs->hw.usb = ucs =
583                 kmalloc(sizeof(struct usb_cardstate), GFP_KERNEL);
584         if (!ucs) {
585                 pr_err("out of memory\n");
586                 return -ENOMEM;
587         }
588 
589         ucs->bchars[0] = 0;
590         ucs->bchars[1] = 0;
591         ucs->bchars[2] = 0;
592         ucs->bchars[3] = 0;
593         ucs->bchars[4] = 0x11;
594         ucs->bchars[5] = 0x13;
595         ucs->bulk_out_buffer = NULL;
596         ucs->bulk_out_urb = NULL;
597         ucs->read_urb = NULL;
598         tasklet_init(&cs->write_tasklet,
599                      gigaset_modem_fill, (unsigned long) cs);
600 
601         return 0;
602 }
603 
604 /* Send data from current skb to the device. */
605 static int write_modem(struct cardstate *cs)
606 {
607         int ret = 0;
608         int count;
609         struct bc_state *bcs = &cs->bcs[0]; /* only one channel */
610         struct usb_cardstate *ucs = cs->hw.usb;
611         unsigned long flags;
612 
613         gig_dbg(DEBUG_OUTPUT, "len: %d...", bcs->tx_skb->len);
614 
615         if (!bcs->tx_skb->len) {
616                 dev_kfree_skb_any(bcs->tx_skb);
617                 bcs->tx_skb = NULL;
618                 return -EINVAL;
619         }
620 
621         /* Copy data to bulk out buffer and transmit data */
622         count = min(bcs->tx_skb->len, (unsigned) ucs->bulk_out_size);
623         skb_copy_from_linear_data(bcs->tx_skb, ucs->bulk_out_buffer, count);
624         skb_pull(bcs->tx_skb, count);
625         ucs->busy = 1;
626         gig_dbg(DEBUG_OUTPUT, "write_modem: send %d bytes", count);
627 
628         spin_lock_irqsave(&cs->lock, flags);
629         if (cs->connected) {
630                 usb_fill_bulk_urb(ucs->bulk_out_urb, ucs->udev,
631                                   usb_sndbulkpipe(ucs->udev,
632                                                   ucs->bulk_out_epnum),
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_epnum = usb_endpoint_num(endpoint);
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->rcvbuf = kmalloc(buffer_size, GFP_KERNEL);
745         if (!ucs->rcvbuf) {
746                 dev_err(cs->dev, "Couldn't allocate rcvbuf\n");
747                 retval = -ENOMEM;
748                 goto error;
749         }
750         /* Fill the interrupt urb and send it to the core */
751         usb_fill_int_urb(ucs->read_urb, udev,
752                          usb_rcvintpipe(udev, usb_endpoint_num(endpoint)),
753                          ucs->rcvbuf, buffer_size,
754                          gigaset_read_int_callback,
755                          cs, endpoint->bInterval);
756 
757         retval = usb_submit_urb(ucs->read_urb, GFP_KERNEL);
758         if (retval) {
759                 dev_err(cs->dev, "Could not submit URB (error %d)\n", -retval);
760                 goto error;
761         }
762 
763         /* tell common part that the device is ready */
764         if (startmode == SM_LOCKED)
765                 cs->mstate = MS_LOCKED;
766 
767         retval = gigaset_start(cs);
768         if (retval < 0) {
769                 tasklet_kill(&cs->write_tasklet);
770                 goto error;
771         }
772         return 0;
773 
774 error:
775         usb_kill_urb(ucs->read_urb);
776         kfree(ucs->bulk_out_buffer);
777         usb_free_urb(ucs->bulk_out_urb);
778         kfree(ucs->rcvbuf);
779         usb_free_urb(ucs->read_urb);
780         usb_set_intfdata(interface, NULL);
781         ucs->read_urb = ucs->bulk_out_urb = NULL;
782         ucs->rcvbuf = ucs->bulk_out_buffer = NULL;
783         usb_put_dev(ucs->udev);
784         ucs->udev = NULL;
785         ucs->interface = NULL;
786         gigaset_freecs(cs);
787         return retval;
788 }
789 
790 static void gigaset_disconnect(struct usb_interface *interface)
791 {
792         struct cardstate *cs;
793         struct usb_cardstate *ucs;
794 
795         cs = usb_get_intfdata(interface);
796         ucs = cs->hw.usb;
797 
798         dev_info(cs->dev, "disconnecting Gigaset USB adapter\n");
799 
800         usb_kill_urb(ucs->read_urb);
801 
802         gigaset_stop(cs);
803 
804         usb_set_intfdata(interface, NULL);
805         tasklet_kill(&cs->write_tasklet);
806 
807         usb_kill_urb(ucs->bulk_out_urb);
808 
809         kfree(ucs->bulk_out_buffer);
810         usb_free_urb(ucs->bulk_out_urb);
811         kfree(ucs->rcvbuf);
812         usb_free_urb(ucs->read_urb);
813         ucs->read_urb = ucs->bulk_out_urb = NULL;
814         ucs->rcvbuf = ucs->bulk_out_buffer = NULL;
815 
816         usb_put_dev(ucs->udev);
817         ucs->interface = NULL;
818         ucs->udev = NULL;
819         cs->dev = NULL;
820         gigaset_freecs(cs);
821 }
822 
823 /* gigaset_suspend
824  * This function is called before the USB connection is suspended or reset.
825  */
826 static int gigaset_suspend(struct usb_interface *intf, pm_message_t message)
827 {
828         struct cardstate *cs = usb_get_intfdata(intf);
829 
830         /* stop activity */
831         cs->connected = 0;      /* prevent rescheduling */
832         usb_kill_urb(cs->hw.usb->read_urb);
833         tasklet_kill(&cs->write_tasklet);
834         usb_kill_urb(cs->hw.usb->bulk_out_urb);
835 
836         gig_dbg(DEBUG_SUSPEND, "suspend complete");
837         return 0;
838 }
839 
840 /* gigaset_resume
841  * This function is called after the USB connection has been resumed or reset.
842  */
843 static int gigaset_resume(struct usb_interface *intf)
844 {
845         struct cardstate *cs = usb_get_intfdata(intf);
846         int rc;
847 
848         /* resubmit interrupt URB */
849         cs->connected = 1;
850         rc = usb_submit_urb(cs->hw.usb->read_urb, GFP_KERNEL);
851         if (rc) {
852                 dev_err(cs->dev, "Could not submit read URB (error %d)\n", -rc);
853                 return rc;
854         }
855 
856         gig_dbg(DEBUG_SUSPEND, "resume complete");
857         return 0;
858 }
859 
860 /* gigaset_pre_reset
861  * This function is called before the USB connection is reset.
862  */
863 static int gigaset_pre_reset(struct usb_interface *intf)
864 {
865         /* same as suspend */
866         return gigaset_suspend(intf, PMSG_ON);
867 }
868 
869 static const struct gigaset_ops ops = {
870         gigaset_write_cmd,
871         gigaset_write_room,
872         gigaset_chars_in_buffer,
873         gigaset_brkchars,
874         gigaset_init_bchannel,
875         gigaset_close_bchannel,
876         gigaset_initbcshw,
877         gigaset_freebcshw,
878         gigaset_reinitbcshw,
879         gigaset_initcshw,
880         gigaset_freecshw,
881         gigaset_set_modem_ctrl,
882         gigaset_baud_rate,
883         gigaset_set_line_ctrl,
884         gigaset_m10x_send_skb,
885         gigaset_m10x_input,
886 };
887 
888 /*
889  * This function is called while kernel-module is loaded
890  */
891 static int __init usb_gigaset_init(void)
892 {
893         int result;
894 
895         /* allocate memory for our driver state and initialize it */
896         driver = gigaset_initdriver(GIGASET_MINOR, GIGASET_MINORS,
897                                     GIGASET_MODULENAME, GIGASET_DEVNAME,
898                                     &ops, THIS_MODULE);
899         if (driver == NULL) {
900                 result = -ENOMEM;
901                 goto error;
902         }
903 
904         /* register this driver with the USB subsystem */
905         result = usb_register(&gigaset_usb_driver);
906         if (result < 0) {
907                 pr_err("error %d registering USB driver\n", -result);
908                 goto error;
909         }
910 
911         pr_info(DRIVER_DESC "\n");
912         return 0;
913 
914 error:
915         if (driver)
916                 gigaset_freedriver(driver);
917         driver = NULL;
918         return result;
919 }
920 
921 /*
922  * This function is called while unloading the kernel-module
923  */
924 static void __exit usb_gigaset_exit(void)
925 {
926         int i;
927 
928         gigaset_blockdriver(driver); /* => probe will fail
929                                       * => no gigaset_start any more
930                                       */
931 
932         /* stop all connected devices */
933         for (i = 0; i < driver->minors; i++)
934                 gigaset_shutdown(driver->cs + i);
935 
936         /* from now on, no isdn callback should be possible */
937 
938         /* deregister this driver with the USB subsystem */
939         usb_deregister(&gigaset_usb_driver);
940         /* this will call the disconnect-callback */
941         /* from now on, no disconnect/probe callback should be running */
942 
943         gigaset_freedriver(driver);
944         driver = NULL;
945 }
946 
947 
948 module_init(usb_gigaset_init);
949 module_exit(usb_gigaset_exit);
950 
951 MODULE_AUTHOR(DRIVER_AUTHOR);
952 MODULE_DESCRIPTION(DRIVER_DESC);
953 
954 MODULE_LICENSE("GPL");
955 

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