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