Merge branch 'fixes-jgarzik' of git://git.kernel.org/pub/scm/linux/kernel/git/linvill...
[linux-2.6] / 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
20 #include <linux/errno.h>
21 #include <linux/init.h>
22 #include <linux/slab.h>
23 #include <linux/usb.h>
24 #include <linux/module.h>
25 #include <linux/moduleparam.h>
26
27 /* Version Information */
28 #define DRIVER_AUTHOR "Hansjoerg Lipp <hjlipp@web.de>, Stefan Eilers"
29 #define DRIVER_DESC "USB Driver for Gigaset 307x using M105"
30
31 /* Module parameters */
32
33 static int startmode = SM_ISDN;
34 static int cidmode = 1;
35
36 module_param(startmode, int, S_IRUGO);
37 module_param(cidmode, int, S_IRUGO);
38 MODULE_PARM_DESC(startmode, "start in isdn4linux mode");
39 MODULE_PARM_DESC(cidmode, "Call-ID mode");
40
41 #define GIGASET_MINORS     1
42 #define GIGASET_MINOR      8
43 #define GIGASET_MODULENAME "usb_gigaset"
44 #define GIGASET_DEVNAME    "ttyGU"
45
46 #define IF_WRITEBUF 2000 //FIXME  // WAKEUP_CHARS: 256
47
48 /* Values for the Gigaset M105 Data */
49 #define USB_M105_VENDOR_ID      0x0681
50 #define USB_M105_PRODUCT_ID     0x0009
51
52 /* table of devices that work with this driver */
53 static const struct usb_device_id gigaset_table [] = {
54         { USB_DEVICE(USB_M105_VENDOR_ID, USB_M105_PRODUCT_ID) },
55         { }                                     /* Terminating entry */
56 };
57
58 MODULE_DEVICE_TABLE(usb, gigaset_table);
59
60 /*
61  * Control requests (empty fields: 00)
62  *
63  *       RT|RQ|VALUE|INDEX|LEN  |DATA
64  * In:
65  *       C1 08             01
66  *            Get flags (1 byte). Bits: 0=dtr,1=rts,3-7:?
67  *       C1 0F             ll ll
68  *            Get device information/status (llll: 0x200 and 0x40 seen).
69  *            Real size: I only saw MIN(llll,0x64).
70  *            Contents: seems to be always the same...
71  *              offset 0x00: Length of this structure (0x64) (len: 1,2,3 bytes)
72  *              offset 0x3c: String (16 bit chars): "MCCI USB Serial V2.0"
73  *              rest:        ?
74  * Out:
75  *       41 11
76  *            Initialize/reset device ?
77  *       41 00 xx 00
78  *            ? (xx=00 or 01; 01 on start, 00 on close)
79  *       41 07 vv mm
80  *            Set/clear flags vv=value, mm=mask (see RQ 08)
81  *       41 12 xx
82  *            Used before the following configuration requests are issued
83  *            (with xx=0x0f). I've seen other values<0xf, though.
84  *       41 01 xx xx
85  *            Set baud rate. xxxx=ceil(0x384000/rate)=trunc(0x383fff/rate)+1.
86  *       41 03 ps bb
87  *            Set byte size and parity. p:  0x20=even,0x10=odd,0x00=no parity
88  *                                     [    0x30: m, 0x40: s           ]
89  *                                     [s:  0: 1 stop bit; 1: 1.5; 2: 2]
90  *                                      bb: bits/byte (seen 7 and 8)
91  *       41 13 -- -- -- -- 10 00 ww 00 00 00 xx 00 00 00 yy 00 00 00 zz 00 00 00
92  *            ??
93  *            Initialization: 01, 40, 00, 00
94  *            Open device:    00  40, 00, 00
95  *            yy and zz seem to be equal, either 0x00 or 0x0a
96  *            (ww,xx) pairs seen: (00,00), (00,40), (01,40), (09,80), (19,80)
97  *       41 19 -- -- -- -- 06 00 00 00 00 xx 11 13
98  *            Used after every "configuration sequence" (RQ 12, RQs 01/03/13).
99  *            xx is usually 0x00 but was 0x7e before starting data transfer
100  *            in unimodem mode. So, this might be an array of characters that need
101  *            special treatment ("commit all bufferd data"?), 11=^Q, 13=^S.
102  *
103  * Unimodem mode: use "modprobe ppp_async flag_time=0" as the device _needs_ two
104  * flags per packet.
105  */
106
107 static int gigaset_probe(struct usb_interface *interface,
108                          const struct usb_device_id *id);
109 static void gigaset_disconnect(struct usb_interface *interface);
110
111 static struct gigaset_driver *driver = NULL;
112 static struct cardstate *cardstate = NULL;
113
114 /* usb specific object needed to register this driver with the usb subsystem */
115 static struct usb_driver gigaset_usb_driver = {
116         .name =         GIGASET_MODULENAME,
117         .probe =        gigaset_probe,
118         .disconnect =   gigaset_disconnect,
119         .id_table =     gigaset_table,
120 };
121
122 struct usb_cardstate {
123         struct usb_device       *udev;          /* usb device pointer */
124         struct usb_interface    *interface;     /* interface for this device */
125         atomic_t                busy;           /* bulk output in progress */
126
127         /* Output buffer */
128         unsigned char           *bulk_out_buffer;
129         int                     bulk_out_size;
130         __u8                    bulk_out_endpointAddr;
131         struct urb              *bulk_out_urb;
132
133         /* Input buffer */
134         int                     rcvbuf_size;
135         struct urb              *read_urb;
136         __u8                    int_in_endpointAddr;
137
138         char                    bchars[6];              /* for request 0x19 */
139 };
140
141 static inline unsigned tiocm_to_gigaset(unsigned state)
142 {
143         return ((state & TIOCM_DTR) ? 1 : 0) | ((state & TIOCM_RTS) ? 2 : 0);
144 }
145
146 #ifdef CONFIG_GIGASET_UNDOCREQ
147 /* WARNING: EXPERIMENTAL! */
148 static int gigaset_set_modem_ctrl(struct cardstate *cs, unsigned old_state,
149                                   unsigned new_state)
150 {
151         struct usb_device *udev = cs->hw.usb->udev;
152         unsigned mask, val;
153         int r;
154
155         mask = tiocm_to_gigaset(old_state ^ new_state);
156         val = tiocm_to_gigaset(new_state);
157
158         gig_dbg(DEBUG_USBREQ, "set flags 0x%02x with mask 0x%02x", val, mask);
159         // don't use this in an interrupt/BH
160         r = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 7, 0x41,
161                             (val & 0xff) | ((mask & 0xff) << 8), 0,
162                             NULL, 0, 2000 /* timeout? */);
163         if (r < 0)
164                 return r;
165         //..
166         return 0;
167 }
168
169 static int set_value(struct cardstate *cs, u8 req, u16 val)
170 {
171         struct usb_device *udev = cs->hw.usb->udev;
172         int r, r2;
173
174         gig_dbg(DEBUG_USBREQ, "request %02x (%04x)",
175                 (unsigned)req, (unsigned)val);
176         r = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x12, 0x41,
177                             0xf /*?*/, 0, NULL, 0, 2000 /*?*/);
178                             /* no idea what this does */
179         if (r < 0) {
180                 dev_err(&udev->dev, "error %d on request 0x12\n", -r);
181                 return r;
182         }
183
184         r = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), req, 0x41,
185                             val, 0, NULL, 0, 2000 /*?*/);
186         if (r < 0)
187                 dev_err(&udev->dev, "error %d on request 0x%02x\n",
188                         -r, (unsigned)req);
189
190         r2 = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x19, 0x41,
191                              0, 0, cs->hw.usb->bchars, 6, 2000 /*?*/);
192         if (r2 < 0)
193                 dev_err(&udev->dev, "error %d on request 0x19\n", -r2);
194
195         return r < 0 ? r : (r2 < 0 ? r2 : 0);
196 }
197
198 /* WARNING: HIGHLY EXPERIMENTAL! */
199 // don't use this in an interrupt/BH
200 static int gigaset_baud_rate(struct cardstate *cs, unsigned cflag)
201 {
202         u16 val;
203         u32 rate;
204
205         cflag &= CBAUD;
206
207         switch (cflag) {
208         //FIXME more values?
209         case    B300: rate =     300; break;
210         case    B600: rate =     600; break;
211         case   B1200: rate =    1200; break;
212         case   B2400: rate =    2400; break;
213         case   B4800: rate =    4800; break;
214         case   B9600: rate =    9600; break;
215         case  B19200: rate =   19200; break;
216         case  B38400: rate =   38400; break;
217         case  B57600: rate =   57600; break;
218         case B115200: rate =  115200; break;
219         default:
220                 rate =  9600;
221                 dev_err(cs->dev, "unsupported baudrate request 0x%x,"
222                         " using default of B9600\n", cflag);
223         }
224
225         val = 0x383fff / rate + 1;
226
227         return set_value(cs, 1, val);
228 }
229
230 /* WARNING: HIGHLY EXPERIMENTAL! */
231 // don't use this in an interrupt/BH
232 static int gigaset_set_line_ctrl(struct cardstate *cs, unsigned cflag)
233 {
234         u16 val = 0;
235
236         /* set the parity */
237         if (cflag & PARENB)
238                 val |= (cflag & PARODD) ? 0x10 : 0x20;
239
240         /* set the number of data bits */
241         switch (cflag & CSIZE) {
242         case CS5:
243                 val |= 5 << 8; break;
244         case CS6:
245                 val |= 6 << 8; break;
246         case CS7:
247                 val |= 7 << 8; break;
248         case CS8:
249                 val |= 8 << 8; break;
250         default:
251                 dev_err(cs->dev, "CSIZE was not CS5-CS8, using default of 8\n");
252                 val |= 8 << 8;
253                 break;
254         }
255
256         /* set the number of stop bits */
257         if (cflag & CSTOPB) {
258                 if ((cflag & CSIZE) == CS5)
259                         val |= 1; /* 1.5 stop bits */ //FIXME is this okay?
260                 else
261                         val |= 2; /* 2 stop bits */
262         }
263
264         return set_value(cs, 3, val);
265 }
266
267 #else
268 static int gigaset_set_modem_ctrl(struct cardstate *cs, unsigned old_state,
269                                   unsigned new_state)
270 {
271         return -EINVAL;
272 }
273
274 static int gigaset_set_line_ctrl(struct cardstate *cs, unsigned cflag)
275 {
276         return -EINVAL;
277 }
278
279 static int gigaset_baud_rate(struct cardstate *cs, unsigned cflag)
280 {
281         return -EINVAL;
282 }
283 #endif
284
285
286  /*================================================================================================================*/
287 static int gigaset_init_bchannel(struct bc_state *bcs)
288 {
289         /* nothing to do for M10x */
290         gigaset_bchannel_up(bcs);
291         return 0;
292 }
293
294 static int gigaset_close_bchannel(struct bc_state *bcs)
295 {
296         /* nothing to do for M10x */
297         gigaset_bchannel_down(bcs);
298         return 0;
299 }
300
301 static int write_modem(struct cardstate *cs);
302 static int send_cb(struct cardstate *cs, struct cmdbuf_t *cb);
303
304
305 /* Write tasklet handler: Continue sending current skb, or send command, or
306  * start sending an skb from the send queue.
307  */
308 static void gigaset_modem_fill(unsigned long data)
309 {
310         struct cardstate *cs = (struct cardstate *) data;
311         struct bc_state *bcs = &cs->bcs[0]; /* only one channel */
312         struct cmdbuf_t *cb;
313         int again;
314
315         gig_dbg(DEBUG_OUTPUT, "modem_fill");
316
317         if (atomic_read(&cs->hw.usb->busy)) {
318                 gig_dbg(DEBUG_OUTPUT, "modem_fill: busy");
319                 return;
320         }
321
322         do {
323                 again = 0;
324                 if (!bcs->tx_skb) { /* no skb is being sent */
325                         cb = cs->cmdbuf;
326                         if (cb) { /* commands to send? */
327                                 gig_dbg(DEBUG_OUTPUT, "modem_fill: cb");
328                                 if (send_cb(cs, cb) < 0) {
329                                         gig_dbg(DEBUG_OUTPUT,
330                                                 "modem_fill: send_cb failed");
331                                         again = 1; /* no callback will be
332                                                       called! */
333                                 }
334                         } else { /* skbs to send? */
335                                 bcs->tx_skb = skb_dequeue(&bcs->squeue);
336                                 if (bcs->tx_skb)
337                                         gig_dbg(DEBUG_INTR,
338                                                 "Dequeued skb (Adr: %lx)!",
339                                                 (unsigned long) bcs->tx_skb);
340                         }
341                 }
342
343                 if (bcs->tx_skb) {
344                         gig_dbg(DEBUG_OUTPUT, "modem_fill: tx_skb");
345                         if (write_modem(cs) < 0) {
346                                 gig_dbg(DEBUG_OUTPUT,
347                                         "modem_fill: write_modem failed");
348                                 // FIXME should we tell the LL?
349                                 again = 1; /* no callback will be called! */
350                         }
351                 }
352         } while (again);
353 }
354
355 /**
356  *      gigaset_read_int_callback
357  *
358  *      It is called if the data was received from the device.
359  */
360 static void gigaset_read_int_callback(struct urb *urb)
361 {
362         struct inbuf_t *inbuf = urb->context;
363         struct cardstate *cs = inbuf->cs;
364         int resubmit = 0;
365         int r;
366         unsigned numbytes;
367         unsigned char *src;
368         unsigned long flags;
369
370         if (!urb->status) {
371                 if (!cs->connected) {
372                         err("%s: disconnected", __func__); /* should never happen */
373                         return;
374                 }
375
376                 numbytes = urb->actual_length;
377
378                 if (numbytes) {
379                         src = inbuf->rcvbuf;
380                         if (unlikely(*src))
381                                 dev_warn(cs->dev,
382                                     "%s: There was no leading 0, but 0x%02x!\n",
383                                          __func__, (unsigned) *src);
384                         ++src; /* skip leading 0x00 */
385                         --numbytes;
386                         if (gigaset_fill_inbuf(inbuf, src, numbytes)) {
387                                 gig_dbg(DEBUG_INTR, "%s-->BH", __func__);
388                                 gigaset_schedule_event(inbuf->cs);
389                         }
390                 } else
391                         gig_dbg(DEBUG_INTR, "Received zero block length");
392                 resubmit = 1;
393         } else {
394                 /* The urb might have been killed. */
395                 gig_dbg(DEBUG_ANY, "%s - nonzero read bulk status received: %d",
396                         __func__, urb->status);
397                 if (urb->status != -ENOENT) { /* not killed */
398                         if (!cs->connected) {
399                                 err("%s: disconnected", __func__); /* should never happen */
400                                 return;
401                         }
402                         resubmit = 1;
403                 }
404         }
405
406         if (resubmit) {
407                 spin_lock_irqsave(&cs->lock, flags);
408                 r = cs->connected ? usb_submit_urb(urb, GFP_ATOMIC) : -ENODEV;
409                 spin_unlock_irqrestore(&cs->lock, flags);
410                 if (r)
411                         dev_err(cs->dev, "error %d when resubmitting urb.\n",
412                                 -r);
413         }
414 }
415
416
417 /* This callback routine is called when data was transmitted to the device. */
418 static void gigaset_write_bulk_callback(struct urb *urb)
419 {
420         struct cardstate *cs = urb->context;
421         unsigned long flags;
422
423         if (urb->status)
424                 dev_err(cs->dev, "bulk transfer failed (status %d)\n",
425                         -urb->status);
426                 /* That's all we can do. Communication problems
427                    are handled by timeouts or network protocols. */
428
429         spin_lock_irqsave(&cs->lock, flags);
430         if (!cs->connected) {
431                 err("%s: not connected", __func__);
432         } else {
433                 atomic_set(&cs->hw.usb->busy, 0);
434                 tasklet_schedule(&cs->write_tasklet);
435         }
436         spin_unlock_irqrestore(&cs->lock, flags);
437 }
438
439 static int send_cb(struct cardstate *cs, struct cmdbuf_t *cb)
440 {
441         struct cmdbuf_t *tcb;
442         unsigned long flags;
443         int count;
444         int status = -ENOENT; // FIXME
445         struct usb_cardstate *ucs = cs->hw.usb;
446
447         do {
448                 if (!cb->len) {
449                         tcb = cb;
450
451                         spin_lock_irqsave(&cs->cmdlock, flags);
452                         cs->cmdbytes -= cs->curlen;
453                         gig_dbg(DEBUG_OUTPUT, "send_cb: sent %u bytes, %u left",
454                                 cs->curlen, cs->cmdbytes);
455                         cs->cmdbuf = cb = cb->next;
456                         if (cb) {
457                                 cb->prev = NULL;
458                                 cs->curlen = cb->len;
459                         } else {
460                                 cs->lastcmdbuf = NULL;
461                                 cs->curlen = 0;
462                         }
463                         spin_unlock_irqrestore(&cs->cmdlock, flags);
464
465                         if (tcb->wake_tasklet)
466                                 tasklet_schedule(tcb->wake_tasklet);
467                         kfree(tcb);
468                 }
469                 if (cb) {
470                         count = min(cb->len, ucs->bulk_out_size);
471                         gig_dbg(DEBUG_OUTPUT, "send_cb: send %d bytes", count);
472
473                         usb_fill_bulk_urb(ucs->bulk_out_urb, ucs->udev,
474                                           usb_sndbulkpipe(ucs->udev,
475                                              ucs->bulk_out_endpointAddr & 0x0f),
476                                           cb->buf + cb->offset, count,
477                                           gigaset_write_bulk_callback, cs);
478
479                         cb->offset += count;
480                         cb->len -= count;
481                         atomic_set(&ucs->busy, 1);
482
483                         spin_lock_irqsave(&cs->lock, flags);
484                         status = cs->connected ? usb_submit_urb(ucs->bulk_out_urb, GFP_ATOMIC) : -ENODEV;
485                         spin_unlock_irqrestore(&cs->lock, flags);
486
487                         if (status) {
488                                 atomic_set(&ucs->busy, 0);
489                                 err("could not submit urb (error %d)\n",
490                                     -status);
491                                 cb->len = 0; /* skip urb => remove cb+wakeup
492                                                 in next loop cycle */
493                         }
494                 }
495         } while (cb && status); /* next command on error */
496
497         return status;
498 }
499
500 /* Send command to device. */
501 static int gigaset_write_cmd(struct cardstate *cs, const unsigned char *buf,
502                              int len, struct tasklet_struct *wake_tasklet)
503 {
504         struct cmdbuf_t *cb;
505         unsigned long flags;
506
507         gigaset_dbg_buffer(atomic_read(&cs->mstate) != MS_LOCKED ?
508                              DEBUG_TRANSCMD : DEBUG_LOCKCMD,
509                            "CMD Transmit", len, buf);
510
511         if (len <= 0)
512                 return 0;
513
514         if (!(cb = kmalloc(sizeof(struct cmdbuf_t) + len, GFP_ATOMIC))) {
515                 dev_err(cs->dev, "%s: out of memory\n", __func__);
516                 return -ENOMEM;
517         }
518
519         memcpy(cb->buf, buf, len);
520         cb->len = len;
521         cb->offset = 0;
522         cb->next = NULL;
523         cb->wake_tasklet = wake_tasklet;
524
525         spin_lock_irqsave(&cs->cmdlock, flags);
526         cb->prev = cs->lastcmdbuf;
527         if (cs->lastcmdbuf)
528                 cs->lastcmdbuf->next = cb;
529         else {
530                 cs->cmdbuf = cb;
531                 cs->curlen = len;
532         }
533         cs->cmdbytes += len;
534         cs->lastcmdbuf = cb;
535         spin_unlock_irqrestore(&cs->cmdlock, flags);
536
537         spin_lock_irqsave(&cs->lock, flags);
538         if (cs->connected)
539                 tasklet_schedule(&cs->write_tasklet);
540         spin_unlock_irqrestore(&cs->lock, flags);
541         return len;
542 }
543
544 static int gigaset_write_room(struct cardstate *cs)
545 {
546         unsigned bytes;
547
548         bytes = cs->cmdbytes;
549         return bytes < IF_WRITEBUF ? IF_WRITEBUF - bytes : 0;
550 }
551
552 static int gigaset_chars_in_buffer(struct cardstate *cs)
553 {
554         return cs->cmdbytes;
555 }
556
557 static int gigaset_brkchars(struct cardstate *cs, const unsigned char buf[6])
558 {
559 #ifdef CONFIG_GIGASET_UNDOCREQ
560         struct usb_device *udev = cs->hw.usb->udev;
561
562         gigaset_dbg_buffer(DEBUG_USBREQ, "brkchars", 6, buf);
563         memcpy(cs->hw.usb->bchars, buf, 6);
564         return usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x19, 0x41,
565                                0, 0, &buf, 6, 2000);
566 #else
567         return -EINVAL;
568 #endif
569 }
570
571 static int gigaset_freebcshw(struct bc_state *bcs)
572 {
573         /* unused */
574         return 1;
575 }
576
577 /* Initialize the b-channel structure */
578 static int gigaset_initbcshw(struct bc_state *bcs)
579 {
580         /* unused */
581         bcs->hw.usb = NULL;
582         return 1;
583 }
584
585 static void gigaset_reinitbcshw(struct bc_state *bcs)
586 {
587         /* nothing to do for M10x */
588 }
589
590 static void gigaset_freecshw(struct cardstate *cs)
591 {
592         tasklet_kill(&cs->write_tasklet);
593         kfree(cs->hw.usb);
594 }
595
596 static int gigaset_initcshw(struct cardstate *cs)
597 {
598         struct usb_cardstate *ucs;
599
600         cs->hw.usb = ucs =
601                 kmalloc(sizeof(struct usb_cardstate), GFP_KERNEL);
602         if (!ucs)
603                 return 0;
604
605         ucs->bchars[0] = 0;
606         ucs->bchars[1] = 0;
607         ucs->bchars[2] = 0;
608         ucs->bchars[3] = 0;
609         ucs->bchars[4] = 0x11;
610         ucs->bchars[5] = 0x13;
611         ucs->bulk_out_buffer = NULL;
612         ucs->bulk_out_urb = NULL;
613         //ucs->urb_cmd_out = NULL;
614         ucs->read_urb = NULL;
615         tasklet_init(&cs->write_tasklet,
616                      &gigaset_modem_fill, (unsigned long) cs);
617
618         return 1;
619 }
620
621 /* Send data from current skb to the device. */
622 static int write_modem(struct cardstate *cs)
623 {
624         int ret = 0;
625         int count;
626         struct bc_state *bcs = &cs->bcs[0]; /* only one channel */
627         struct usb_cardstate *ucs = cs->hw.usb;
628         unsigned long flags;
629
630         gig_dbg(DEBUG_WRITE, "len: %d...", bcs->tx_skb->len);
631
632         if (!bcs->tx_skb->len) {
633                 dev_kfree_skb_any(bcs->tx_skb);
634                 bcs->tx_skb = NULL;
635                 return -EINVAL;
636         }
637
638         /* Copy data to bulk out buffer and  // FIXME copying not necessary
639          * transmit data
640          */
641         count = min(bcs->tx_skb->len, (unsigned) ucs->bulk_out_size);
642         skb_copy_from_linear_data(bcs->tx_skb, ucs->bulk_out_buffer, count);
643         skb_pull(bcs->tx_skb, count);
644         atomic_set(&ucs->busy, 1);
645         gig_dbg(DEBUG_OUTPUT, "write_modem: send %d bytes", count);
646
647         spin_lock_irqsave(&cs->lock, flags);
648         if (cs->connected) {
649                 usb_fill_bulk_urb(ucs->bulk_out_urb, ucs->udev,
650                                   usb_sndbulkpipe(ucs->udev,
651                                                   ucs->bulk_out_endpointAddr & 0x0f),
652                                   ucs->bulk_out_buffer, count,
653                                   gigaset_write_bulk_callback, cs);
654                 ret = usb_submit_urb(ucs->bulk_out_urb, GFP_ATOMIC);
655         } else {
656                 ret = -ENODEV;
657         }
658         spin_unlock_irqrestore(&cs->lock, flags);
659
660         if (ret) {
661                 err("could not submit urb (error %d)\n", -ret);
662                 atomic_set(&ucs->busy, 0);
663         }
664
665         if (!bcs->tx_skb->len) {
666                 /* skb sent completely */
667                 gigaset_skb_sent(bcs, bcs->tx_skb); //FIXME also, when ret<0?
668
669                 gig_dbg(DEBUG_INTR, "kfree skb (Adr: %lx)!",
670                         (unsigned long) bcs->tx_skb);
671                 dev_kfree_skb_any(bcs->tx_skb);
672                 bcs->tx_skb = NULL;
673         }
674
675         return ret;
676 }
677
678 static int gigaset_probe(struct usb_interface *interface,
679                          const struct usb_device_id *id)
680 {
681         int retval;
682         struct usb_device *udev = interface_to_usbdev(interface);
683         unsigned int ifnum;
684         struct usb_host_interface *hostif;
685         struct cardstate *cs = NULL;
686         struct usb_cardstate *ucs = NULL;
687         struct usb_endpoint_descriptor *endpoint;
688         int buffer_size;
689         int alt;
690
691         gig_dbg(DEBUG_ANY,
692                 "%s: Check if device matches .. (Vendor: 0x%x, Product: 0x%x)",
693                 __func__, le16_to_cpu(udev->descriptor.idVendor),
694                 le16_to_cpu(udev->descriptor.idProduct));
695
696         retval = -ENODEV; //FIXME
697
698         /* See if the device offered us matches what we can accept */
699         if ((le16_to_cpu(udev->descriptor.idVendor)  != USB_M105_VENDOR_ID) ||
700             (le16_to_cpu(udev->descriptor.idProduct) != USB_M105_PRODUCT_ID))
701                 return -ENODEV;
702
703         /* this starts to become ascii art... */
704         hostif = interface->cur_altsetting;
705         alt = hostif->desc.bAlternateSetting;
706         ifnum = hostif->desc.bInterfaceNumber; // FIXME ?
707
708         if (alt != 0 || ifnum != 0) {
709                 dev_warn(&udev->dev, "ifnum %d, alt %d\n", ifnum, alt);
710                 return -ENODEV;
711         }
712
713         /* Reject application specific intefaces
714          *
715          */
716         if (hostif->desc.bInterfaceClass != 255) {
717                 dev_info(&udev->dev,
718                 "%s: Device matched but iface_desc[%d]->bInterfaceClass==%d!\n",
719                          __func__, ifnum, hostif->desc.bInterfaceClass);
720                 return -ENODEV;
721         }
722
723         dev_info(&udev->dev, "%s: Device matched ... !\n", __func__);
724
725         cs = gigaset_getunassignedcs(driver);
726         if (!cs) {
727                 dev_warn(&udev->dev, "no free cardstate\n");
728                 return -ENODEV;
729         }
730         ucs = cs->hw.usb;
731
732         /* save off device structure ptrs for later use */
733         usb_get_dev(udev);
734         ucs->udev = udev;
735         ucs->interface = interface;
736         cs->dev = &interface->dev;
737
738         /* save address of controller structure */
739         usb_set_intfdata(interface, cs); // dev_set_drvdata(&interface->dev, cs);
740
741         endpoint = &hostif->endpoint[0].desc;
742
743         buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
744         ucs->bulk_out_size = buffer_size;
745         ucs->bulk_out_endpointAddr = endpoint->bEndpointAddress;
746         ucs->bulk_out_buffer = kmalloc(buffer_size, GFP_KERNEL);
747         if (!ucs->bulk_out_buffer) {
748                 dev_err(cs->dev, "Couldn't allocate bulk_out_buffer\n");
749                 retval = -ENOMEM;
750                 goto error;
751         }
752
753         ucs->bulk_out_urb = usb_alloc_urb(0, GFP_KERNEL);
754         if (!ucs->bulk_out_urb) {
755                 dev_err(cs->dev, "Couldn't allocate bulk_out_urb\n");
756                 retval = -ENOMEM;
757                 goto error;
758         }
759
760         endpoint = &hostif->endpoint[1].desc;
761
762         atomic_set(&ucs->busy, 0);
763
764         ucs->read_urb = usb_alloc_urb(0, GFP_KERNEL);
765         if (!ucs->read_urb) {
766                 dev_err(cs->dev, "No free urbs available\n");
767                 retval = -ENOMEM;
768                 goto error;
769         }
770         buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
771         ucs->rcvbuf_size = buffer_size;
772         ucs->int_in_endpointAddr = endpoint->bEndpointAddress;
773         cs->inbuf[0].rcvbuf = kmalloc(buffer_size, GFP_KERNEL);
774         if (!cs->inbuf[0].rcvbuf) {
775                 dev_err(cs->dev, "Couldn't allocate rcvbuf\n");
776                 retval = -ENOMEM;
777                 goto error;
778         }
779         /* Fill the interrupt urb and send it to the core */
780         usb_fill_int_urb(ucs->read_urb, udev,
781                          usb_rcvintpipe(udev,
782                                         endpoint->bEndpointAddress & 0x0f),
783                          cs->inbuf[0].rcvbuf, buffer_size,
784                          gigaset_read_int_callback,
785                          cs->inbuf + 0, endpoint->bInterval);
786
787         retval = usb_submit_urb(ucs->read_urb, GFP_KERNEL);
788         if (retval) {
789                 dev_err(cs->dev, "Could not submit URB (error %d)\n", -retval);
790                 goto error;
791         }
792
793         /* tell common part that the device is ready */
794         if (startmode == SM_LOCKED)
795                 atomic_set(&cs->mstate, MS_LOCKED);
796
797         if (!gigaset_start(cs)) {
798                 tasklet_kill(&cs->write_tasklet);
799                 retval = -ENODEV; //FIXME
800                 goto error;
801         }
802         return 0;
803
804 error:
805         usb_kill_urb(ucs->read_urb);
806         kfree(ucs->bulk_out_buffer);
807         usb_free_urb(ucs->bulk_out_urb);
808         kfree(cs->inbuf[0].rcvbuf);
809         usb_free_urb(ucs->read_urb);
810         usb_set_intfdata(interface, NULL);
811         ucs->read_urb = ucs->bulk_out_urb = NULL;
812         cs->inbuf[0].rcvbuf = ucs->bulk_out_buffer = NULL;
813         usb_put_dev(ucs->udev);
814         ucs->udev = NULL;
815         ucs->interface = NULL;
816         gigaset_unassign(cs);
817         return retval;
818 }
819
820 static void gigaset_disconnect(struct usb_interface *interface)
821 {
822         struct cardstate *cs;
823         struct usb_cardstate *ucs;
824
825         cs = usb_get_intfdata(interface);
826         ucs = cs->hw.usb;
827         usb_kill_urb(ucs->read_urb);
828
829         gigaset_stop(cs);
830
831         usb_set_intfdata(interface, NULL);
832         tasklet_kill(&cs->write_tasklet);
833
834         usb_kill_urb(ucs->bulk_out_urb);        /* FIXME: only if active? */
835
836         kfree(ucs->bulk_out_buffer);
837         usb_free_urb(ucs->bulk_out_urb);
838         kfree(cs->inbuf[0].rcvbuf);
839         usb_free_urb(ucs->read_urb);
840         ucs->read_urb = ucs->bulk_out_urb = NULL;
841         cs->inbuf[0].rcvbuf = ucs->bulk_out_buffer = NULL;
842
843         usb_put_dev(ucs->udev);
844         ucs->interface = NULL;
845         ucs->udev = NULL;
846         cs->dev = NULL;
847         gigaset_unassign(cs);
848 }
849
850 static const struct gigaset_ops ops = {
851         gigaset_write_cmd,
852         gigaset_write_room,
853         gigaset_chars_in_buffer,
854         gigaset_brkchars,
855         gigaset_init_bchannel,
856         gigaset_close_bchannel,
857         gigaset_initbcshw,
858         gigaset_freebcshw,
859         gigaset_reinitbcshw,
860         gigaset_initcshw,
861         gigaset_freecshw,
862         gigaset_set_modem_ctrl,
863         gigaset_baud_rate,
864         gigaset_set_line_ctrl,
865         gigaset_m10x_send_skb,
866         gigaset_m10x_input,
867 };
868
869 /**
870  *      usb_gigaset_init
871  * This function is called while kernel-module is loaded
872  */
873 static int __init usb_gigaset_init(void)
874 {
875         int result;
876
877         /* allocate memory for our driver state and intialize it */
878         if ((driver = gigaset_initdriver(GIGASET_MINOR, GIGASET_MINORS,
879                                        GIGASET_MODULENAME, GIGASET_DEVNAME,
880                                        &ops, THIS_MODULE)) == NULL)
881                 goto error;
882
883         /* allocate memory for our device state and intialize it */
884         cardstate = gigaset_initcs(driver, 1, 1, 0, cidmode, GIGASET_MODULENAME);
885         if (!cardstate)
886                 goto error;
887
888         /* register this driver with the USB subsystem */
889         result = usb_register(&gigaset_usb_driver);
890         if (result < 0) {
891                 err("usb_gigaset: usb_register failed (error %d)",
892                     -result);
893                 goto error;
894         }
895
896         info(DRIVER_AUTHOR);
897         info(DRIVER_DESC);
898         return 0;
899
900 error:  if (cardstate)
901                 gigaset_freecs(cardstate);
902         cardstate = NULL;
903         if (driver)
904                 gigaset_freedriver(driver);
905         driver = NULL;
906         return -1;
907 }
908
909
910 /**
911  *      usb_gigaset_exit
912  * This function is called while unloading the kernel-module
913  */
914 static void __exit usb_gigaset_exit(void)
915 {
916         gigaset_blockdriver(driver); /* => probe will fail
917                                       * => no gigaset_start any more
918                                       */
919
920         gigaset_shutdown(cardstate);
921         /* from now on, no isdn callback should be possible */
922
923         /* deregister this driver with the USB subsystem */
924         usb_deregister(&gigaset_usb_driver);
925         /* this will call the disconnect-callback */
926         /* from now on, no disconnect/probe callback should be running */
927
928         gigaset_freecs(cardstate);
929         cardstate = NULL;
930         gigaset_freedriver(driver);
931         driver = NULL;
932 }
933
934
935 module_init(usb_gigaset_init);
936 module_exit(usb_gigaset_exit);
937
938 MODULE_AUTHOR(DRIVER_AUTHOR);
939 MODULE_DESCRIPTION(DRIVER_DESC);
940
941 MODULE_LICENSE("GPL");