Merge branch 'for-linus' of master.kernel.org:/pub/scm/linux/kernel/git/roland/infiniband
[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_DEVFSNAME  "gig/usb/"
45 #define GIGASET_DEVNAME    "ttyGU"
46
47 #define IF_WRITEBUF 2000 //FIXME  // WAKEUP_CHARS: 256
48
49 /* Values for the Gigaset M105 Data */
50 #define USB_M105_VENDOR_ID      0x0681
51 #define USB_M105_PRODUCT_ID     0x0009
52
53 /* table of devices that work with this driver */
54 static struct usb_device_id gigaset_table [] = {
55         { USB_DEVICE(USB_M105_VENDOR_ID, USB_M105_PRODUCT_ID) },
56         { }                                     /* Terminating entry */
57 };
58
59 MODULE_DEVICE_TABLE(usb, gigaset_table);
60
61 /*
62  * Control requests (empty fields: 00)
63  *
64  *       RT|RQ|VALUE|INDEX|LEN  |DATA
65  * In:
66  *       C1 08             01
67  *            Get flags (1 byte). Bits: 0=dtr,1=rts,3-7:?
68  *       C1 0F             ll ll
69  *            Get device information/status (llll: 0x200 and 0x40 seen).
70  *            Real size: I only saw MIN(llll,0x64).
71  *            Contents: seems to be always the same...
72  *              offset 0x00: Length of this structure (0x64) (len: 1,2,3 bytes)
73  *              offset 0x3c: String (16 bit chars): "MCCI USB Serial V2.0"
74  *              rest:        ?
75  * Out:
76  *       41 11
77  *            Initialize/reset device ?
78  *       41 00 xx 00
79  *            ? (xx=00 or 01; 01 on start, 00 on close)
80  *       41 07 vv mm
81  *            Set/clear flags vv=value, mm=mask (see RQ 08)
82  *       41 12 xx
83  *            Used before the following configuration requests are issued
84  *            (with xx=0x0f). I've seen other values<0xf, though.
85  *       41 01 xx xx
86  *            Set baud rate. xxxx=ceil(0x384000/rate)=trunc(0x383fff/rate)+1.
87  *       41 03 ps bb
88  *            Set byte size and parity. p:  0x20=even,0x10=odd,0x00=no parity
89  *                                     [    0x30: m, 0x40: s           ]
90  *                                     [s:  0: 1 stop bit; 1: 1.5; 2: 2]
91  *                                      bb: bits/byte (seen 7 and 8)
92  *       41 13 -- -- -- -- 10 00 ww 00 00 00 xx 00 00 00 yy 00 00 00 zz 00 00 00
93  *            ??
94  *            Initialization: 01, 40, 00, 00
95  *            Open device:    00  40, 00, 00
96  *            yy and zz seem to be equal, either 0x00 or 0x0a
97  *            (ww,xx) pairs seen: (00,00), (00,40), (01,40), (09,80), (19,80)
98  *       41 19 -- -- -- -- 06 00 00 00 00 xx 11 13
99  *            Used after every "configuration sequence" (RQ 12, RQs 01/03/13).
100  *            xx is usually 0x00 but was 0x7e before starting data transfer
101  *            in unimodem mode. So, this might be an array of characters that need
102  *            special treatment ("commit all bufferd data"?), 11=^Q, 13=^S.
103  *
104  * Unimodem mode: use "modprobe ppp_async flag_time=0" as the device _needs_ two
105  * flags per packet.
106  */
107
108 static int gigaset_probe(struct usb_interface *interface,
109                          const struct usb_device_id *id);
110 static void gigaset_disconnect(struct usb_interface *interface);
111
112 static struct gigaset_driver *driver = NULL;
113 static struct cardstate *cardstate = NULL;
114
115 /* usb specific object needed to register this driver with the usb subsystem */
116 static struct usb_driver gigaset_usb_driver = {
117         .name =         GIGASET_MODULENAME,
118         .probe =        gigaset_probe,
119         .disconnect =   gigaset_disconnect,
120         .id_table =     gigaset_table,
121 };
122
123 struct usb_cardstate {
124         struct usb_device       *udev;          /* usb device pointer */
125         struct usb_interface    *interface;     /* interface for this device */
126         atomic_t                busy;           /* bulk output in progress */
127
128         /* Output buffer */
129         unsigned char           *bulk_out_buffer;
130         int                     bulk_out_size;
131         __u8                    bulk_out_endpointAddr;
132         struct urb              *bulk_out_urb;
133
134         /* Input buffer */
135         int                     rcvbuf_size;
136         struct urb              *read_urb;
137         __u8                    int_in_endpointAddr;
138
139         char                    bchars[6];              /* for request 0x19 */
140 };
141
142 struct usb_bc_state {};
143
144 static inline unsigned tiocm_to_gigaset(unsigned state)
145 {
146         return ((state & TIOCM_DTR) ? 1 : 0) | ((state & TIOCM_RTS) ? 2 : 0);
147 }
148
149 #ifdef CONFIG_GIGASET_UNDOCREQ
150 /* WARNING: EXPERIMENTAL! */
151 static int gigaset_set_modem_ctrl(struct cardstate *cs, unsigned old_state,
152                                   unsigned new_state)
153 {
154         struct usb_device *udev = cs->hw.usb->udev;
155         unsigned mask, val;
156         int r;
157
158         mask = tiocm_to_gigaset(old_state ^ new_state);
159         val = tiocm_to_gigaset(new_state);
160
161         gig_dbg(DEBUG_USBREQ, "set flags 0x%02x with mask 0x%02x", val, mask);
162         // don't use this in an interrupt/BH
163         r = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 7, 0x41,
164                             (val & 0xff) | ((mask & 0xff) << 8), 0,
165                             NULL, 0, 2000 /* timeout? */);
166         if (r < 0)
167                 return r;
168         //..
169         return 0;
170 }
171
172 static int set_value(struct cardstate *cs, u8 req, u16 val)
173 {
174         struct usb_device *udev = cs->hw.usb->udev;
175         int r, r2;
176
177         gig_dbg(DEBUG_USBREQ, "request %02x (%04x)",
178                 (unsigned)req, (unsigned)val);
179         r = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x12, 0x41,
180                             0xf /*?*/, 0, NULL, 0, 2000 /*?*/);
181                             /* no idea what this does */
182         if (r < 0) {
183                 dev_err(&udev->dev, "error %d on request 0x12\n", -r);
184                 return r;
185         }
186
187         r = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), req, 0x41,
188                             val, 0, NULL, 0, 2000 /*?*/);
189         if (r < 0)
190                 dev_err(&udev->dev, "error %d on request 0x%02x\n",
191                         -r, (unsigned)req);
192
193         r2 = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x19, 0x41,
194                              0, 0, cs->hw.usb->bchars, 6, 2000 /*?*/);
195         if (r2 < 0)
196                 dev_err(&udev->dev, "error %d on request 0x19\n", -r2);
197
198         return r < 0 ? r : (r2 < 0 ? r2 : 0);
199 }
200
201 /* WARNING: HIGHLY EXPERIMENTAL! */
202 // don't use this in an interrupt/BH
203 static int gigaset_baud_rate(struct cardstate *cs, unsigned cflag)
204 {
205         u16 val;
206         u32 rate;
207
208         cflag &= CBAUD;
209
210         switch (cflag) {
211         //FIXME more values?
212         case    B300: rate =     300; break;
213         case    B600: rate =     600; break;
214         case   B1200: rate =    1200; break;
215         case   B2400: rate =    2400; break;
216         case   B4800: rate =    4800; break;
217         case   B9600: rate =    9600; break;
218         case  B19200: rate =   19200; break;
219         case  B38400: rate =   38400; break;
220         case  B57600: rate =   57600; break;
221         case B115200: rate =  115200; break;
222         default:
223                 rate =  9600;
224                 dev_err(cs->dev, "unsupported baudrate request 0x%x,"
225                         " using default of B9600\n", cflag);
226         }
227
228         val = 0x383fff / rate + 1;
229
230         return set_value(cs, 1, val);
231 }
232
233 /* WARNING: HIGHLY EXPERIMENTAL! */
234 // don't use this in an interrupt/BH
235 static int gigaset_set_line_ctrl(struct cardstate *cs, unsigned cflag)
236 {
237         u16 val = 0;
238
239         /* set the parity */
240         if (cflag & PARENB)
241                 val |= (cflag & PARODD) ? 0x10 : 0x20;
242
243         /* set the number of data bits */
244         switch (cflag & CSIZE) {
245         case CS5:
246                 val |= 5 << 8; break;
247         case CS6:
248                 val |= 6 << 8; break;
249         case CS7:
250                 val |= 7 << 8; break;
251         case CS8:
252                 val |= 8 << 8; break;
253         default:
254                 dev_err(cs->dev, "CSIZE was not CS5-CS8, using default of 8\n");
255                 val |= 8 << 8;
256                 break;
257         }
258
259         /* set the number of stop bits */
260         if (cflag & CSTOPB) {
261                 if ((cflag & CSIZE) == CS5)
262                         val |= 1; /* 1.5 stop bits */ //FIXME is this okay?
263                 else
264                         val |= 2; /* 2 stop bits */
265         }
266
267         return set_value(cs, 3, val);
268 }
269
270 #else
271 static int gigaset_set_modem_ctrl(struct cardstate *cs, unsigned old_state,
272                                   unsigned new_state)
273 {
274         return -EINVAL;
275 }
276
277 static int gigaset_set_line_ctrl(struct cardstate *cs, unsigned cflag)
278 {
279         return -EINVAL;
280 }
281
282 static int gigaset_baud_rate(struct cardstate *cs, unsigned cflag)
283 {
284         return -EINVAL;
285 }
286 #endif
287
288
289  /*================================================================================================================*/
290 static int gigaset_init_bchannel(struct bc_state *bcs)
291 {
292         /* nothing to do for M10x */
293         gigaset_bchannel_up(bcs);
294         return 0;
295 }
296
297 static int gigaset_close_bchannel(struct bc_state *bcs)
298 {
299         /* nothing to do for M10x */
300         gigaset_bchannel_down(bcs);
301         return 0;
302 }
303
304 static int write_modem(struct cardstate *cs);
305 static int send_cb(struct cardstate *cs, struct cmdbuf_t *cb);
306
307
308 /* Write tasklet handler: Continue sending current skb, or send command, or
309  * start sending an skb from the send queue.
310  */
311 static void gigaset_modem_fill(unsigned long data)
312 {
313         struct cardstate *cs = (struct cardstate *) data;
314         struct bc_state *bcs = &cs->bcs[0]; /* only one channel */
315         struct cmdbuf_t *cb;
316         unsigned long flags;
317         int again;
318
319         gig_dbg(DEBUG_OUTPUT, "modem_fill");
320
321         if (atomic_read(&cs->hw.usb->busy)) {
322                 gig_dbg(DEBUG_OUTPUT, "modem_fill: busy");
323                 return;
324         }
325
326         do {
327                 again = 0;
328                 if (!bcs->tx_skb) { /* no skb is being sent */
329                         spin_lock_irqsave(&cs->cmdlock, flags);
330                         cb = cs->cmdbuf;
331                         spin_unlock_irqrestore(&cs->cmdlock, flags);
332                         if (cb) { /* commands to send? */
333                                 gig_dbg(DEBUG_OUTPUT, "modem_fill: cb");
334                                 if (send_cb(cs, cb) < 0) {
335                                         gig_dbg(DEBUG_OUTPUT,
336                                                 "modem_fill: send_cb failed");
337                                         again = 1; /* no callback will be
338                                                       called! */
339                                 }
340                         } else { /* skbs to send? */
341                                 bcs->tx_skb = skb_dequeue(&bcs->squeue);
342                                 if (bcs->tx_skb)
343                                         gig_dbg(DEBUG_INTR,
344                                                 "Dequeued skb (Adr: %lx)!",
345                                                 (unsigned long) bcs->tx_skb);
346                         }
347                 }
348
349                 if (bcs->tx_skb) {
350                         gig_dbg(DEBUG_OUTPUT, "modem_fill: tx_skb");
351                         if (write_modem(cs) < 0) {
352                                 gig_dbg(DEBUG_OUTPUT,
353                                         "modem_fill: write_modem failed");
354                                 // FIXME should we tell the LL?
355                                 again = 1; /* no callback will be called! */
356                         }
357                 }
358         } while (again);
359 }
360
361 /**
362  *      gigaset_read_int_callback
363  *
364  *      It is called if the data was received from the device.
365  */
366 static void gigaset_read_int_callback(struct urb *urb, struct pt_regs *regs)
367 {
368         struct inbuf_t *inbuf = urb->context;
369         struct cardstate *cs = inbuf->cs;
370         int resubmit = 0;
371         int r;
372         unsigned numbytes;
373         unsigned char *src;
374         unsigned long flags;
375
376         if (!urb->status) {
377                 if (!cs->connected) {
378                         err("%s: disconnected", __func__); /* should never happen */
379                         return;
380                 }
381
382                 numbytes = urb->actual_length;
383
384                 if (numbytes) {
385                         src = inbuf->rcvbuf;
386                         if (unlikely(*src))
387                                 dev_warn(cs->dev,
388                                     "%s: There was no leading 0, but 0x%02x!\n",
389                                          __func__, (unsigned) *src);
390                         ++src; /* skip leading 0x00 */
391                         --numbytes;
392                         if (gigaset_fill_inbuf(inbuf, src, numbytes)) {
393                                 gig_dbg(DEBUG_INTR, "%s-->BH", __func__);
394                                 gigaset_schedule_event(inbuf->cs);
395                         }
396                 } else
397                         gig_dbg(DEBUG_INTR, "Received zero block length");
398                 resubmit = 1;
399         } else {
400                 /* The urb might have been killed. */
401                 gig_dbg(DEBUG_ANY, "%s - nonzero read bulk status received: %d",
402                         __func__, urb->status);
403                 if (urb->status != -ENOENT) { /* not killed */
404                         if (!cs->connected) {
405                                 err("%s: disconnected", __func__); /* should never happen */
406                                 return;
407                         }
408                         resubmit = 1;
409                 }
410         }
411
412         if (resubmit) {
413                 spin_lock_irqsave(&cs->lock, flags);
414                 r = cs->connected ? usb_submit_urb(urb, SLAB_ATOMIC) : -ENODEV;
415                 spin_unlock_irqrestore(&cs->lock, flags);
416                 if (r)
417                         dev_err(cs->dev, "error %d when resubmitting urb.\n",
418                                 -r);
419         }
420 }
421
422
423 /* This callback routine is called when data was transmitted to the device. */
424 static void gigaset_write_bulk_callback(struct urb *urb, struct pt_regs *regs)
425 {
426         struct cardstate *cs = urb->context;
427         unsigned long flags;
428
429         if (urb->status)
430                 dev_err(cs->dev, "bulk transfer failed (status %d)\n",
431                         -urb->status);
432                 /* That's all we can do. Communication problems
433                    are handled by timeouts or network protocols. */
434
435         spin_lock_irqsave(&cs->lock, flags);
436         if (!cs->connected) {
437                 err("%s: not connected", __func__);
438         } else {
439                 atomic_set(&cs->hw.usb->busy, 0);
440                 tasklet_schedule(&cs->write_tasklet);
441         }
442         spin_unlock_irqrestore(&cs->lock, flags);
443 }
444
445 static int send_cb(struct cardstate *cs, struct cmdbuf_t *cb)
446 {
447         struct cmdbuf_t *tcb;
448         unsigned long flags;
449         int count;
450         int status = -ENOENT; // FIXME
451         struct usb_cardstate *ucs = cs->hw.usb;
452
453         do {
454                 if (!cb->len) {
455                         tcb = cb;
456
457                         spin_lock_irqsave(&cs->cmdlock, flags);
458                         cs->cmdbytes -= cs->curlen;
459                         gig_dbg(DEBUG_OUTPUT, "send_cb: sent %u bytes, %u left",
460                                 cs->curlen, cs->cmdbytes);
461                         cs->cmdbuf = cb = cb->next;
462                         if (cb) {
463                                 cb->prev = NULL;
464                                 cs->curlen = cb->len;
465                         } else {
466                                 cs->lastcmdbuf = NULL;
467                                 cs->curlen = 0;
468                         }
469                         spin_unlock_irqrestore(&cs->cmdlock, flags);
470
471                         if (tcb->wake_tasklet)
472                                 tasklet_schedule(tcb->wake_tasklet);
473                         kfree(tcb);
474                 }
475                 if (cb) {
476                         count = min(cb->len, ucs->bulk_out_size);
477                         gig_dbg(DEBUG_OUTPUT, "send_cb: send %d bytes", count);
478
479                         usb_fill_bulk_urb(ucs->bulk_out_urb, ucs->udev,
480                                           usb_sndbulkpipe(ucs->udev,
481                                              ucs->bulk_out_endpointAddr & 0x0f),
482                                           cb->buf + cb->offset, count,
483                                           gigaset_write_bulk_callback, cs);
484
485                         cb->offset += count;
486                         cb->len -= count;
487                         atomic_set(&ucs->busy, 1);
488
489                         spin_lock_irqsave(&cs->lock, flags);
490                         status = cs->connected ? usb_submit_urb(ucs->bulk_out_urb, SLAB_ATOMIC) : -ENODEV;
491                         spin_unlock_irqrestore(&cs->lock, flags);
492
493                         if (status) {
494                                 atomic_set(&ucs->busy, 0);
495                                 err("could not submit urb (error %d)\n",
496                                     -status);
497                                 cb->len = 0; /* skip urb => remove cb+wakeup
498                                                 in next loop cycle */
499                         }
500                 }
501         } while (cb && status); /* next command on error */
502
503         return status;
504 }
505
506 /* Send command to device. */
507 static int gigaset_write_cmd(struct cardstate *cs, const unsigned char *buf,
508                              int len, struct tasklet_struct *wake_tasklet)
509 {
510         struct cmdbuf_t *cb;
511         unsigned long flags;
512
513         gigaset_dbg_buffer(atomic_read(&cs->mstate) != MS_LOCKED ?
514                              DEBUG_TRANSCMD : DEBUG_LOCKCMD,
515                            "CMD Transmit", len, buf);
516
517         if (len <= 0)
518                 return 0;
519
520         if (!(cb = kmalloc(sizeof(struct cmdbuf_t) + len, GFP_ATOMIC))) {
521                 dev_err(cs->dev, "%s: out of memory\n", __func__);
522                 return -ENOMEM;
523         }
524
525         memcpy(cb->buf, buf, len);
526         cb->len = len;
527         cb->offset = 0;
528         cb->next = NULL;
529         cb->wake_tasklet = wake_tasklet;
530
531         spin_lock_irqsave(&cs->cmdlock, flags);
532         cb->prev = cs->lastcmdbuf;
533         if (cs->lastcmdbuf)
534                 cs->lastcmdbuf->next = cb;
535         else {
536                 cs->cmdbuf = cb;
537                 cs->curlen = len;
538         }
539         cs->cmdbytes += len;
540         cs->lastcmdbuf = cb;
541         spin_unlock_irqrestore(&cs->cmdlock, flags);
542
543         spin_lock_irqsave(&cs->lock, flags);
544         if (cs->connected)
545                 tasklet_schedule(&cs->write_tasklet);
546         spin_unlock_irqrestore(&cs->lock, flags);
547         return len;
548 }
549
550 static int gigaset_write_room(struct cardstate *cs)
551 {
552         unsigned long flags;
553         unsigned bytes;
554
555         spin_lock_irqsave(&cs->cmdlock, flags);
556         bytes = cs->cmdbytes;
557         spin_unlock_irqrestore(&cs->cmdlock, flags);
558
559         return bytes < IF_WRITEBUF ? IF_WRITEBUF - bytes : 0;
560 }
561
562 static int gigaset_chars_in_buffer(struct cardstate *cs)
563 {
564         return cs->cmdbytes;
565 }
566
567 static int gigaset_brkchars(struct cardstate *cs, const unsigned char buf[6])
568 {
569 #ifdef CONFIG_GIGASET_UNDOCREQ
570         struct usb_device *udev = cs->hw.usb->udev;
571
572         gigaset_dbg_buffer(DEBUG_USBREQ, "brkchars", 6, buf);
573         memcpy(cs->hw.usb->bchars, buf, 6);
574         return usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x19, 0x41,
575                                0, 0, &buf, 6, 2000);
576 #else
577         return -EINVAL;
578 #endif
579 }
580
581 static int gigaset_freebcshw(struct bc_state *bcs)
582 {
583         if (!bcs->hw.usb)
584                 return 0;
585         //FIXME
586         kfree(bcs->hw.usb);
587         return 1;
588 }
589
590 /* Initialize the b-channel structure */
591 static int gigaset_initbcshw(struct bc_state *bcs)
592 {
593         bcs->hw.usb = kmalloc(sizeof(struct usb_bc_state), GFP_KERNEL);
594         if (!bcs->hw.usb)
595                 return 0;
596
597         return 1;
598 }
599
600 static void gigaset_reinitbcshw(struct bc_state *bcs)
601 {
602 }
603
604 static void gigaset_freecshw(struct cardstate *cs)
605 {
606         tasklet_kill(&cs->write_tasklet);
607         kfree(cs->hw.usb);
608 }
609
610 static int gigaset_initcshw(struct cardstate *cs)
611 {
612         struct usb_cardstate *ucs;
613
614         cs->hw.usb = ucs =
615                 kmalloc(sizeof(struct usb_cardstate), GFP_KERNEL);
616         if (!ucs)
617                 return 0;
618
619         ucs->bchars[0] = 0;
620         ucs->bchars[1] = 0;
621         ucs->bchars[2] = 0;
622         ucs->bchars[3] = 0;
623         ucs->bchars[4] = 0x11;
624         ucs->bchars[5] = 0x13;
625         ucs->bulk_out_buffer = NULL;
626         ucs->bulk_out_urb = NULL;
627         //ucs->urb_cmd_out = NULL;
628         ucs->read_urb = NULL;
629         tasklet_init(&cs->write_tasklet,
630                      &gigaset_modem_fill, (unsigned long) cs);
631
632         return 1;
633 }
634
635 /* Send data from current skb to the device. */
636 static int write_modem(struct cardstate *cs)
637 {
638         int ret = 0;
639         int count;
640         struct bc_state *bcs = &cs->bcs[0]; /* only one channel */
641         struct usb_cardstate *ucs = cs->hw.usb;
642         unsigned long flags;
643
644         gig_dbg(DEBUG_WRITE, "len: %d...", bcs->tx_skb->len);
645
646         if (!bcs->tx_skb->len) {
647                 dev_kfree_skb_any(bcs->tx_skb);
648                 bcs->tx_skb = NULL;
649                 return -EINVAL;
650         }
651
652         /* Copy data to bulk out buffer and  // FIXME copying not necessary
653          * transmit data
654          */
655         count = min(bcs->tx_skb->len, (unsigned) ucs->bulk_out_size);
656         memcpy(ucs->bulk_out_buffer, bcs->tx_skb->data, count);
657         skb_pull(bcs->tx_skb, count);
658         atomic_set(&ucs->busy, 1);
659         gig_dbg(DEBUG_OUTPUT, "write_modem: send %d bytes", count);
660
661         spin_lock_irqsave(&cs->lock, flags);
662         if (cs->connected) {
663                 usb_fill_bulk_urb(ucs->bulk_out_urb, ucs->udev,
664                                   usb_sndbulkpipe(ucs->udev,
665                                                   ucs->bulk_out_endpointAddr & 0x0f),
666                                   ucs->bulk_out_buffer, count,
667                                   gigaset_write_bulk_callback, cs);
668                 ret = usb_submit_urb(ucs->bulk_out_urb, SLAB_ATOMIC);
669         } else {
670                 ret = -ENODEV;
671         }
672         spin_unlock_irqrestore(&cs->lock, flags);
673
674         if (ret) {
675                 err("could not submit urb (error %d)\n", -ret);
676                 atomic_set(&ucs->busy, 0);
677         }
678
679         if (!bcs->tx_skb->len) {
680                 /* skb sent completely */
681                 gigaset_skb_sent(bcs, bcs->tx_skb); //FIXME also, when ret<0?
682
683                 gig_dbg(DEBUG_INTR, "kfree skb (Adr: %lx)!",
684                         (unsigned long) bcs->tx_skb);
685                 dev_kfree_skb_any(bcs->tx_skb);
686                 bcs->tx_skb = NULL;
687         }
688
689         return ret;
690 }
691
692 static int gigaset_probe(struct usb_interface *interface,
693                          const struct usb_device_id *id)
694 {
695         int retval;
696         struct usb_device *udev = interface_to_usbdev(interface);
697         unsigned int ifnum;
698         struct usb_host_interface *hostif;
699         struct cardstate *cs = NULL;
700         struct usb_cardstate *ucs = NULL;
701         struct usb_endpoint_descriptor *endpoint;
702         int buffer_size;
703         int alt;
704
705         gig_dbg(DEBUG_ANY,
706                 "%s: Check if device matches .. (Vendor: 0x%x, Product: 0x%x)",
707                 __func__, le16_to_cpu(udev->descriptor.idVendor),
708                 le16_to_cpu(udev->descriptor.idProduct));
709
710         retval = -ENODEV; //FIXME
711
712         /* See if the device offered us matches what we can accept */
713         if ((le16_to_cpu(udev->descriptor.idVendor)  != USB_M105_VENDOR_ID) ||
714             (le16_to_cpu(udev->descriptor.idProduct) != USB_M105_PRODUCT_ID))
715                 return -ENODEV;
716
717         /* this starts to become ascii art... */
718         hostif = interface->cur_altsetting;
719         alt = hostif->desc.bAlternateSetting;
720         ifnum = hostif->desc.bInterfaceNumber; // FIXME ?
721
722         if (alt != 0 || ifnum != 0) {
723                 dev_warn(&udev->dev, "ifnum %d, alt %d\n", ifnum, alt);
724                 return -ENODEV;
725         }
726
727         /* Reject application specific intefaces
728          *
729          */
730         if (hostif->desc.bInterfaceClass != 255) {
731                 dev_info(&udev->dev,
732                 "%s: Device matched but iface_desc[%d]->bInterfaceClass==%d!\n",
733                          __func__, ifnum, hostif->desc.bInterfaceClass);
734                 return -ENODEV;
735         }
736
737         dev_info(&udev->dev, "%s: Device matched ... !\n", __func__);
738
739         cs = gigaset_getunassignedcs(driver);
740         if (!cs) {
741                 dev_warn(&udev->dev, "no free cardstate\n");
742                 return -ENODEV;
743         }
744         ucs = cs->hw.usb;
745
746         /* save off device structure ptrs for later use */
747         usb_get_dev(udev);
748         ucs->udev = udev;
749         ucs->interface = interface;
750         cs->dev = &interface->dev;
751
752         /* save address of controller structure */
753         usb_set_intfdata(interface, cs); // dev_set_drvdata(&interface->dev, cs);
754
755         endpoint = &hostif->endpoint[0].desc;
756
757         buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
758         ucs->bulk_out_size = buffer_size;
759         ucs->bulk_out_endpointAddr = endpoint->bEndpointAddress;
760         ucs->bulk_out_buffer = kmalloc(buffer_size, GFP_KERNEL);
761         if (!ucs->bulk_out_buffer) {
762                 dev_err(cs->dev, "Couldn't allocate bulk_out_buffer\n");
763                 retval = -ENOMEM;
764                 goto error;
765         }
766
767         ucs->bulk_out_urb = usb_alloc_urb(0, SLAB_KERNEL);
768         if (!ucs->bulk_out_urb) {
769                 dev_err(cs->dev, "Couldn't allocate bulk_out_urb\n");
770                 retval = -ENOMEM;
771                 goto error;
772         }
773
774         endpoint = &hostif->endpoint[1].desc;
775
776         atomic_set(&ucs->busy, 0);
777
778         ucs->read_urb = usb_alloc_urb(0, SLAB_KERNEL);
779         if (!ucs->read_urb) {
780                 dev_err(cs->dev, "No free urbs available\n");
781                 retval = -ENOMEM;
782                 goto error;
783         }
784         buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
785         ucs->rcvbuf_size = buffer_size;
786         ucs->int_in_endpointAddr = endpoint->bEndpointAddress;
787         cs->inbuf[0].rcvbuf = kmalloc(buffer_size, GFP_KERNEL);
788         if (!cs->inbuf[0].rcvbuf) {
789                 dev_err(cs->dev, "Couldn't allocate rcvbuf\n");
790                 retval = -ENOMEM;
791                 goto error;
792         }
793         /* Fill the interrupt urb and send it to the core */
794         usb_fill_int_urb(ucs->read_urb, udev,
795                          usb_rcvintpipe(udev,
796                                         endpoint->bEndpointAddress & 0x0f),
797                          cs->inbuf[0].rcvbuf, buffer_size,
798                          gigaset_read_int_callback,
799                          cs->inbuf + 0, endpoint->bInterval);
800
801         retval = usb_submit_urb(ucs->read_urb, SLAB_KERNEL);
802         if (retval) {
803                 dev_err(cs->dev, "Could not submit URB (error %d)\n", -retval);
804                 goto error;
805         }
806
807         /* tell common part that the device is ready */
808         if (startmode == SM_LOCKED)
809                 atomic_set(&cs->mstate, MS_LOCKED);
810
811         if (!gigaset_start(cs)) {
812                 tasklet_kill(&cs->write_tasklet);
813                 retval = -ENODEV; //FIXME
814                 goto error;
815         }
816         return 0;
817
818 error:
819         if (ucs->read_urb)
820                 usb_kill_urb(ucs->read_urb);
821         kfree(ucs->bulk_out_buffer);
822         if (ucs->bulk_out_urb != NULL)
823                 usb_free_urb(ucs->bulk_out_urb);
824         kfree(cs->inbuf[0].rcvbuf);
825         if (ucs->read_urb != NULL)
826                 usb_free_urb(ucs->read_urb);
827         usb_set_intfdata(interface, NULL);
828         ucs->read_urb = ucs->bulk_out_urb = NULL;
829         cs->inbuf[0].rcvbuf = ucs->bulk_out_buffer = NULL;
830         usb_put_dev(ucs->udev);
831         ucs->udev = NULL;
832         ucs->interface = NULL;
833         gigaset_unassign(cs);
834         return retval;
835 }
836
837 static void gigaset_disconnect(struct usb_interface *interface)
838 {
839         struct cardstate *cs;
840         struct usb_cardstate *ucs;
841
842         cs = usb_get_intfdata(interface);
843         ucs = cs->hw.usb;
844         usb_kill_urb(ucs->read_urb);
845
846         gigaset_stop(cs);
847
848         usb_set_intfdata(interface, NULL);
849         tasklet_kill(&cs->write_tasklet);
850
851         usb_kill_urb(ucs->bulk_out_urb);        /* FIXME: only if active? */
852
853         kfree(ucs->bulk_out_buffer);
854         if (ucs->bulk_out_urb != NULL)
855                 usb_free_urb(ucs->bulk_out_urb);
856         kfree(cs->inbuf[0].rcvbuf);
857         if (ucs->read_urb != NULL)
858                 usb_free_urb(ucs->read_urb);
859         ucs->read_urb = ucs->bulk_out_urb = NULL;
860         cs->inbuf[0].rcvbuf = ucs->bulk_out_buffer = NULL;
861
862         usb_put_dev(ucs->udev);
863         ucs->interface = NULL;
864         ucs->udev = NULL;
865         cs->dev = NULL;
866         gigaset_unassign(cs);
867 }
868
869 static 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  *      usb_gigaset_init
890  * This function is called while kernel-module is loaded
891  */
892 static int __init usb_gigaset_init(void)
893 {
894         int result;
895
896         /* allocate memory for our driver state and intialize it */
897         if ((driver = gigaset_initdriver(GIGASET_MINOR, GIGASET_MINORS,
898                                        GIGASET_MODULENAME, GIGASET_DEVNAME,
899                                        GIGASET_DEVFSNAME, &ops,
900                                        THIS_MODULE)) == NULL)
901                 goto error;
902
903         /* allocate memory for our device state and intialize it */
904         cardstate = gigaset_initcs(driver, 1, 1, 0, cidmode, GIGASET_MODULENAME);
905         if (!cardstate)
906                 goto error;
907
908         /* register this driver with the USB subsystem */
909         result = usb_register(&gigaset_usb_driver);
910         if (result < 0) {
911                 err("usb_gigaset: usb_register failed (error %d)",
912                     -result);
913                 goto error;
914         }
915
916         info(DRIVER_AUTHOR);
917         info(DRIVER_DESC);
918         return 0;
919
920 error:  if (cardstate)
921                 gigaset_freecs(cardstate);
922         cardstate = NULL;
923         if (driver)
924                 gigaset_freedriver(driver);
925         driver = NULL;
926         return -1;
927 }
928
929
930 /**
931  *      usb_gigaset_exit
932  * This function is called while unloading the kernel-module
933  */
934 static void __exit usb_gigaset_exit(void)
935 {
936         gigaset_blockdriver(driver); /* => probe will fail
937                                       * => no gigaset_start any more
938                                       */
939
940         gigaset_shutdown(cardstate);
941         /* from now on, no isdn callback should be possible */
942
943         /* deregister this driver with the USB subsystem */
944         usb_deregister(&gigaset_usb_driver);
945         /* this will call the disconnect-callback */
946         /* from now on, no disconnect/probe callback should be running */
947
948         gigaset_freecs(cardstate);
949         cardstate = NULL;
950         gigaset_freedriver(driver);
951         driver = NULL;
952 }
953
954
955 module_init(usb_gigaset_init);
956 module_exit(usb_gigaset_exit);
957
958 MODULE_AUTHOR(DRIVER_AUTHOR);
959 MODULE_DESCRIPTION(DRIVER_DESC);
960
961 MODULE_LICENSE("GPL");