e847c6e6d3fdc7a63ef5d7a12f7961ea2588e47e
[linux-2.6.git] / 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 /* functions called if a device of this driver is connected/disconnected */
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 /* functions called before/after suspend */
113 static int gigaset_suspend(struct usb_interface *intf, pm_message_t message);
114 static int gigaset_resume(struct usb_interface *intf);
115 static int gigaset_pre_reset(struct usb_interface *intf);
116
117 static struct gigaset_driver *driver = NULL;
118
119 /* usb specific object needed to register this driver with the usb subsystem */
120 static struct usb_driver gigaset_usb_driver = {
121         .name =         GIGASET_MODULENAME,
122         .probe =        gigaset_probe,
123         .disconnect =   gigaset_disconnect,
124         .id_table =     gigaset_table,
125         .suspend =      gigaset_suspend,
126         .resume =       gigaset_resume,
127         .reset_resume = gigaset_resume,
128         .pre_reset =    gigaset_pre_reset,
129         .post_reset =   gigaset_resume,
130 };
131
132 struct usb_cardstate {
133         struct usb_device       *udev;          /* usb device pointer */
134         struct usb_interface    *interface;     /* interface for this device */
135         int                     busy;           /* bulk output in progress */
136
137         /* Output buffer */
138         unsigned char           *bulk_out_buffer;
139         int                     bulk_out_size;
140         __u8                    bulk_out_endpointAddr;
141         struct urb              *bulk_out_urb;
142
143         /* Input buffer */
144         int                     rcvbuf_size;
145         struct urb              *read_urb;
146         __u8                    int_in_endpointAddr;
147
148         char                    bchars[6];              /* for request 0x19 */
149 };
150
151 static inline unsigned tiocm_to_gigaset(unsigned state)
152 {
153         return ((state & TIOCM_DTR) ? 1 : 0) | ((state & TIOCM_RTS) ? 2 : 0);
154 }
155
156 #ifdef CONFIG_GIGASET_UNDOCREQ
157 /* WARNING: EXPERIMENTAL! */
158 static int gigaset_set_modem_ctrl(struct cardstate *cs, unsigned old_state,
159                                   unsigned new_state)
160 {
161         struct usb_device *udev = cs->hw.usb->udev;
162         unsigned mask, val;
163         int r;
164
165         mask = tiocm_to_gigaset(old_state ^ new_state);
166         val = tiocm_to_gigaset(new_state);
167
168         gig_dbg(DEBUG_USBREQ, "set flags 0x%02x with mask 0x%02x", val, mask);
169         // don't use this in an interrupt/BH
170         r = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 7, 0x41,
171                             (val & 0xff) | ((mask & 0xff) << 8), 0,
172                             NULL, 0, 2000 /* timeout? */);
173         if (r < 0)
174                 return r;
175         //..
176         return 0;
177 }
178
179 static int set_value(struct cardstate *cs, u8 req, u16 val)
180 {
181         struct usb_device *udev = cs->hw.usb->udev;
182         int r, r2;
183
184         gig_dbg(DEBUG_USBREQ, "request %02x (%04x)",
185                 (unsigned)req, (unsigned)val);
186         r = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x12, 0x41,
187                             0xf /*?*/, 0, NULL, 0, 2000 /*?*/);
188                             /* no idea what this does */
189         if (r < 0) {
190                 dev_err(&udev->dev, "error %d on request 0x12\n", -r);
191                 return r;
192         }
193
194         r = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), req, 0x41,
195                             val, 0, NULL, 0, 2000 /*?*/);
196         if (r < 0)
197                 dev_err(&udev->dev, "error %d on request 0x%02x\n",
198                         -r, (unsigned)req);
199
200         r2 = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x19, 0x41,
201                              0, 0, cs->hw.usb->bchars, 6, 2000 /*?*/);
202         if (r2 < 0)
203                 dev_err(&udev->dev, "error %d on request 0x19\n", -r2);
204
205         return r < 0 ? r : (r2 < 0 ? r2 : 0);
206 }
207
208 /* WARNING: HIGHLY EXPERIMENTAL! */
209 // don't use this in an interrupt/BH
210 static int gigaset_baud_rate(struct cardstate *cs, unsigned cflag)
211 {
212         u16 val;
213         u32 rate;
214
215         cflag &= CBAUD;
216
217         switch (cflag) {
218         //FIXME more values?
219         case    B300: rate =     300; break;
220         case    B600: rate =     600; break;
221         case   B1200: rate =    1200; break;
222         case   B2400: rate =    2400; break;
223         case   B4800: rate =    4800; break;
224         case   B9600: rate =    9600; break;
225         case  B19200: rate =   19200; break;
226         case  B38400: rate =   38400; break;
227         case  B57600: rate =   57600; break;
228         case B115200: rate =  115200; break;
229         default:
230                 rate =  9600;
231                 dev_err(cs->dev, "unsupported baudrate request 0x%x,"
232                         " using default of B9600\n", cflag);
233         }
234
235         val = 0x383fff / rate + 1;
236
237         return set_value(cs, 1, val);
238 }
239
240 /* WARNING: HIGHLY EXPERIMENTAL! */
241 // don't use this in an interrupt/BH
242 static int gigaset_set_line_ctrl(struct cardstate *cs, unsigned cflag)
243 {
244         u16 val = 0;
245
246         /* set the parity */
247         if (cflag & PARENB)
248                 val |= (cflag & PARODD) ? 0x10 : 0x20;
249
250         /* set the number of data bits */
251         switch (cflag & CSIZE) {
252         case CS5:
253                 val |= 5 << 8; break;
254         case CS6:
255                 val |= 6 << 8; break;
256         case CS7:
257                 val |= 7 << 8; break;
258         case CS8:
259                 val |= 8 << 8; break;
260         default:
261                 dev_err(cs->dev, "CSIZE was not CS5-CS8, using default of 8\n");
262                 val |= 8 << 8;
263                 break;
264         }
265
266         /* set the number of stop bits */
267         if (cflag & CSTOPB) {
268                 if ((cflag & CSIZE) == CS5)
269                         val |= 1; /* 1.5 stop bits */ //FIXME is this okay?
270                 else
271                         val |= 2; /* 2 stop bits */
272         }
273
274         return set_value(cs, 3, val);
275 }
276
277 #else
278 static int gigaset_set_modem_ctrl(struct cardstate *cs, unsigned old_state,
279                                   unsigned new_state)
280 {
281         return -EINVAL;
282 }
283
284 static int gigaset_set_line_ctrl(struct cardstate *cs, unsigned cflag)
285 {
286         return -EINVAL;
287 }
288
289 static int gigaset_baud_rate(struct cardstate *cs, unsigned cflag)
290 {
291         return -EINVAL;
292 }
293 #endif
294
295
296  /*================================================================================================================*/
297 static int gigaset_init_bchannel(struct bc_state *bcs)
298 {
299         /* nothing to do for M10x */
300         gigaset_bchannel_up(bcs);
301         return 0;
302 }
303
304 static int gigaset_close_bchannel(struct bc_state *bcs)
305 {
306         /* nothing to do for M10x */
307         gigaset_bchannel_down(bcs);
308         return 0;
309 }
310
311 static int write_modem(struct cardstate *cs);
312 static int send_cb(struct cardstate *cs, struct cmdbuf_t *cb);
313
314
315 /* Write tasklet handler: Continue sending current skb, or send command, or
316  * start sending an skb from the send queue.
317  */
318 static void gigaset_modem_fill(unsigned long data)
319 {
320         struct cardstate *cs = (struct cardstate *) data;
321         struct bc_state *bcs = &cs->bcs[0]; /* only one channel */
322         struct cmdbuf_t *cb;
323         int again;
324
325         gig_dbg(DEBUG_OUTPUT, "modem_fill");
326
327         if (cs->hw.usb->busy) {
328                 gig_dbg(DEBUG_OUTPUT, "modem_fill: busy");
329                 return;
330         }
331
332         do {
333                 again = 0;
334                 if (!bcs->tx_skb) { /* no skb is being sent */
335                         cb = cs->cmdbuf;
336                         if (cb) { /* commands to send? */
337                                 gig_dbg(DEBUG_OUTPUT, "modem_fill: cb");
338                                 if (send_cb(cs, cb) < 0) {
339                                         gig_dbg(DEBUG_OUTPUT,
340                                                 "modem_fill: send_cb failed");
341                                         again = 1; /* no callback will be
342                                                       called! */
343                                 }
344                         } else { /* skbs to send? */
345                                 bcs->tx_skb = skb_dequeue(&bcs->squeue);
346                                 if (bcs->tx_skb)
347                                         gig_dbg(DEBUG_INTR,
348                                                 "Dequeued skb (Adr: %lx)!",
349                                                 (unsigned long) bcs->tx_skb);
350                         }
351                 }
352
353                 if (bcs->tx_skb) {
354                         gig_dbg(DEBUG_OUTPUT, "modem_fill: tx_skb");
355                         if (write_modem(cs) < 0) {
356                                 gig_dbg(DEBUG_OUTPUT,
357                                         "modem_fill: write_modem failed");
358                                 // FIXME should we tell the LL?
359                                 again = 1; /* no callback will be called! */
360                         }
361                 }
362         } while (again);
363 }
364
365 /**
366  *      gigaset_read_int_callback
367  *
368  *      It is called if the data was received from the device.
369  */
370 static void gigaset_read_int_callback(struct urb *urb)
371 {
372         struct inbuf_t *inbuf = urb->context;
373         struct cardstate *cs = inbuf->cs;
374         int status = urb->status;
375         int r;
376         unsigned numbytes;
377         unsigned char *src;
378         unsigned long flags;
379
380         if (!status) {
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         } else {
398                 /* The urb might have been killed. */
399                 gig_dbg(DEBUG_ANY, "%s - nonzero status received: %d",
400                         __func__, status);
401                 if (status == -ENOENT || status == -ESHUTDOWN)
402                         /* killed or endpoint shutdown: don't resubmit */
403                         return;
404         }
405
406         /* resubmit URB */
407         spin_lock_irqsave(&cs->lock, flags);
408         if (!cs->connected) {
409                 spin_unlock_irqrestore(&cs->lock, flags);
410                 err("%s: disconnected", __func__);
411                 return;
412         }
413         r = usb_submit_urb(urb, GFP_ATOMIC);
414         spin_unlock_irqrestore(&cs->lock, flags);
415         if (r)
416                 dev_err(cs->dev, "error %d resubmitting URB\n", -r);
417 }
418
419
420 /* This callback routine is called when data was transmitted to the device. */
421 static void gigaset_write_bulk_callback(struct urb *urb)
422 {
423         struct cardstate *cs = urb->context;
424         int status = urb->status;
425         unsigned long flags;
426
427         switch (status) {
428         case 0:                 /* normal completion */
429                 break;
430         case -ENOENT:           /* killed */
431                 gig_dbg(DEBUG_ANY, "%s: killed", __func__);
432                 cs->hw.usb->busy = 0;
433                 return;
434         default:
435                 dev_err(cs->dev, "bulk transfer failed (status %d)\n",
436                         -status);
437                 /* That's all we can do. Communication problems
438                    are handled by timeouts or network protocols. */
439         }
440
441         spin_lock_irqsave(&cs->lock, flags);
442         if (!cs->connected) {
443                 err("%s: not connected", __func__);
444         } else {
445                 cs->hw.usb->busy = 0;
446                 tasklet_schedule(&cs->write_tasklet);
447         }
448         spin_unlock_irqrestore(&cs->lock, flags);
449 }
450
451 static int send_cb(struct cardstate *cs, struct cmdbuf_t *cb)
452 {
453         struct cmdbuf_t *tcb;
454         unsigned long flags;
455         int count;
456         int status = -ENOENT; // FIXME
457         struct usb_cardstate *ucs = cs->hw.usb;
458
459         do {
460                 if (!cb->len) {
461                         tcb = cb;
462
463                         spin_lock_irqsave(&cs->cmdlock, flags);
464                         cs->cmdbytes -= cs->curlen;
465                         gig_dbg(DEBUG_OUTPUT, "send_cb: sent %u bytes, %u left",
466                                 cs->curlen, cs->cmdbytes);
467                         cs->cmdbuf = cb = cb->next;
468                         if (cb) {
469                                 cb->prev = NULL;
470                                 cs->curlen = cb->len;
471                         } else {
472                                 cs->lastcmdbuf = NULL;
473                                 cs->curlen = 0;
474                         }
475                         spin_unlock_irqrestore(&cs->cmdlock, flags);
476
477                         if (tcb->wake_tasklet)
478                                 tasklet_schedule(tcb->wake_tasklet);
479                         kfree(tcb);
480                 }
481                 if (cb) {
482                         count = min(cb->len, ucs->bulk_out_size);
483                         gig_dbg(DEBUG_OUTPUT, "send_cb: send %d bytes", count);
484
485                         usb_fill_bulk_urb(ucs->bulk_out_urb, ucs->udev,
486                                           usb_sndbulkpipe(ucs->udev,
487                                              ucs->bulk_out_endpointAddr & 0x0f),
488                                           cb->buf + cb->offset, count,
489                                           gigaset_write_bulk_callback, cs);
490
491                         cb->offset += count;
492                         cb->len -= count;
493                         ucs->busy = 1;
494
495                         spin_lock_irqsave(&cs->lock, flags);
496                         status = cs->connected ? usb_submit_urb(ucs->bulk_out_urb, GFP_ATOMIC) : -ENODEV;
497                         spin_unlock_irqrestore(&cs->lock, flags);
498
499                         if (status) {
500                                 ucs->busy = 0;
501                                 dev_err(cs->dev,
502                                         "could not submit urb (error %d)\n",
503                                         -status);
504                                 cb->len = 0; /* skip urb => remove cb+wakeup
505                                                 in next loop cycle */
506                         }
507                 }
508         } while (cb && status); /* next command on error */
509
510         return status;
511 }
512
513 /* Send command to device. */
514 static int gigaset_write_cmd(struct cardstate *cs, const unsigned char *buf,
515                              int len, struct tasklet_struct *wake_tasklet)
516 {
517         struct cmdbuf_t *cb;
518         unsigned long flags;
519
520         gigaset_dbg_buffer(cs->mstate != MS_LOCKED ?
521                              DEBUG_TRANSCMD : DEBUG_LOCKCMD,
522                            "CMD Transmit", len, buf);
523
524         if (len <= 0)
525                 return 0;
526
527         if (!(cb = kmalloc(sizeof(struct cmdbuf_t) + len, GFP_ATOMIC))) {
528                 dev_err(cs->dev, "%s: out of memory\n", __func__);
529                 return -ENOMEM;
530         }
531
532         memcpy(cb->buf, buf, len);
533         cb->len = len;
534         cb->offset = 0;
535         cb->next = NULL;
536         cb->wake_tasklet = wake_tasklet;
537
538         spin_lock_irqsave(&cs->cmdlock, flags);
539         cb->prev = cs->lastcmdbuf;
540         if (cs->lastcmdbuf)
541                 cs->lastcmdbuf->next = cb;
542         else {
543                 cs->cmdbuf = cb;
544                 cs->curlen = len;
545         }
546         cs->cmdbytes += len;
547         cs->lastcmdbuf = cb;
548         spin_unlock_irqrestore(&cs->cmdlock, flags);
549
550         spin_lock_irqsave(&cs->lock, flags);
551         if (cs->connected)
552                 tasklet_schedule(&cs->write_tasklet);
553         spin_unlock_irqrestore(&cs->lock, flags);
554         return len;
555 }
556
557 static int gigaset_write_room(struct cardstate *cs)
558 {
559         unsigned bytes;
560
561         bytes = cs->cmdbytes;
562         return bytes < IF_WRITEBUF ? IF_WRITEBUF - bytes : 0;
563 }
564
565 static int gigaset_chars_in_buffer(struct cardstate *cs)
566 {
567         return cs->cmdbytes;
568 }
569
570 static int gigaset_brkchars(struct cardstate *cs, const unsigned char buf[6])
571 {
572 #ifdef CONFIG_GIGASET_UNDOCREQ
573         struct usb_device *udev = cs->hw.usb->udev;
574
575         gigaset_dbg_buffer(DEBUG_USBREQ, "brkchars", 6, buf);
576         memcpy(cs->hw.usb->bchars, buf, 6);
577         return usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x19, 0x41,
578                                0, 0, &buf, 6, 2000);
579 #else
580         return -EINVAL;
581 #endif
582 }
583
584 static int gigaset_freebcshw(struct bc_state *bcs)
585 {
586         /* unused */
587         return 1;
588 }
589
590 /* Initialize the b-channel structure */
591 static int gigaset_initbcshw(struct bc_state *bcs)
592 {
593         /* unused */
594         bcs->hw.usb = NULL;
595         return 1;
596 }
597
598 static void gigaset_reinitbcshw(struct bc_state *bcs)
599 {
600         /* nothing to do for M10x */
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         skb_copy_from_linear_data(bcs->tx_skb, ucs->bulk_out_buffer, count);
656         skb_pull(bcs->tx_skb, count);
657         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, GFP_ATOMIC);
668         } else {
669                 ret = -ENODEV;
670         }
671         spin_unlock_irqrestore(&cs->lock, flags);
672
673         if (ret) {
674                 dev_err(cs->dev, "could not submit urb (error %d)\n", -ret);
675                 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         struct usb_host_interface *hostif = interface->cur_altsetting;
697         struct cardstate *cs = NULL;
698         struct usb_cardstate *ucs = NULL;
699         struct usb_endpoint_descriptor *endpoint;
700         int buffer_size;
701
702         gig_dbg(DEBUG_ANY, "%s: Check if device matches ...", __func__);
703
704         /* See if the device offered us matches what we can accept */
705         if ((le16_to_cpu(udev->descriptor.idVendor)  != USB_M105_VENDOR_ID) ||
706             (le16_to_cpu(udev->descriptor.idProduct) != USB_M105_PRODUCT_ID)) {
707                 gig_dbg(DEBUG_ANY, "device ID (0x%x, 0x%x) not for me - skip",
708                         le16_to_cpu(udev->descriptor.idVendor),
709                         le16_to_cpu(udev->descriptor.idProduct));
710                 return -ENODEV;
711         }
712         if (hostif->desc.bInterfaceNumber != 0) {
713                 gig_dbg(DEBUG_ANY, "interface %d not for me - skip",
714                         hostif->desc.bInterfaceNumber);
715                 return -ENODEV;
716         }
717         if (hostif->desc.bAlternateSetting != 0) {
718                 dev_notice(&udev->dev, "unsupported altsetting %d - skip",
719                            hostif->desc.bAlternateSetting);
720                 return -ENODEV;
721         }
722         if (hostif->desc.bInterfaceClass != 255) {
723                 dev_notice(&udev->dev, "unsupported interface class %d - skip",
724                            hostif->desc.bInterfaceClass);
725                 return -ENODEV;
726         }
727
728         dev_info(&udev->dev, "%s: Device matched ... !\n", __func__);
729
730         /* allocate memory for our device state and intialize it */
731         cs = gigaset_initcs(driver, 1, 1, 0, cidmode, GIGASET_MODULENAME);
732         if (!cs)
733                 return -ENODEV;
734         ucs = cs->hw.usb;
735
736         /* save off device structure ptrs for later use */
737         usb_get_dev(udev);
738         ucs->udev = udev;
739         ucs->interface = interface;
740         cs->dev = &interface->dev;
741
742         /* save address of controller structure */
743         usb_set_intfdata(interface, cs); // dev_set_drvdata(&interface->dev, cs);
744
745         endpoint = &hostif->endpoint[0].desc;
746
747         buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
748         ucs->bulk_out_size = buffer_size;
749         ucs->bulk_out_endpointAddr = endpoint->bEndpointAddress;
750         ucs->bulk_out_buffer = kmalloc(buffer_size, GFP_KERNEL);
751         if (!ucs->bulk_out_buffer) {
752                 dev_err(cs->dev, "Couldn't allocate bulk_out_buffer\n");
753                 retval = -ENOMEM;
754                 goto error;
755         }
756
757         ucs->bulk_out_urb = usb_alloc_urb(0, GFP_KERNEL);
758         if (!ucs->bulk_out_urb) {
759                 dev_err(cs->dev, "Couldn't allocate bulk_out_urb\n");
760                 retval = -ENOMEM;
761                 goto error;
762         }
763
764         endpoint = &hostif->endpoint[1].desc;
765
766         ucs->busy = 0;
767
768         ucs->read_urb = usb_alloc_urb(0, GFP_KERNEL);
769         if (!ucs->read_urb) {
770                 dev_err(cs->dev, "No free urbs available\n");
771                 retval = -ENOMEM;
772                 goto error;
773         }
774         buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
775         ucs->rcvbuf_size = buffer_size;
776         ucs->int_in_endpointAddr = endpoint->bEndpointAddress;
777         cs->inbuf[0].rcvbuf = kmalloc(buffer_size, GFP_KERNEL);
778         if (!cs->inbuf[0].rcvbuf) {
779                 dev_err(cs->dev, "Couldn't allocate rcvbuf\n");
780                 retval = -ENOMEM;
781                 goto error;
782         }
783         /* Fill the interrupt urb and send it to the core */
784         usb_fill_int_urb(ucs->read_urb, udev,
785                          usb_rcvintpipe(udev,
786                                         endpoint->bEndpointAddress & 0x0f),
787                          cs->inbuf[0].rcvbuf, buffer_size,
788                          gigaset_read_int_callback,
789                          cs->inbuf + 0, endpoint->bInterval);
790
791         retval = usb_submit_urb(ucs->read_urb, GFP_KERNEL);
792         if (retval) {
793                 dev_err(cs->dev, "Could not submit URB (error %d)\n", -retval);
794                 goto error;
795         }
796
797         /* tell common part that the device is ready */
798         if (startmode == SM_LOCKED)
799                 cs->mstate = MS_LOCKED;
800
801         if (!gigaset_start(cs)) {
802                 tasklet_kill(&cs->write_tasklet);
803                 retval = -ENODEV; //FIXME
804                 goto error;
805         }
806         return 0;
807
808 error:
809         usb_kill_urb(ucs->read_urb);
810         kfree(ucs->bulk_out_buffer);
811         usb_free_urb(ucs->bulk_out_urb);
812         kfree(cs->inbuf[0].rcvbuf);
813         usb_free_urb(ucs->read_urb);
814         usb_set_intfdata(interface, NULL);
815         ucs->read_urb = ucs->bulk_out_urb = NULL;
816         cs->inbuf[0].rcvbuf = ucs->bulk_out_buffer = NULL;
817         usb_put_dev(ucs->udev);
818         ucs->udev = NULL;
819         ucs->interface = NULL;
820         gigaset_freecs(cs);
821         return retval;
822 }
823
824 static void gigaset_disconnect(struct usb_interface *interface)
825 {
826         struct cardstate *cs;
827         struct usb_cardstate *ucs;
828
829         cs = usb_get_intfdata(interface);
830         ucs = cs->hw.usb;
831
832         dev_info(cs->dev, "disconnecting Gigaset USB adapter\n");
833
834         usb_kill_urb(ucs->read_urb);
835
836         gigaset_stop(cs);
837
838         usb_set_intfdata(interface, NULL);
839         tasklet_kill(&cs->write_tasklet);
840
841         usb_kill_urb(ucs->bulk_out_urb);
842
843         kfree(ucs->bulk_out_buffer);
844         usb_free_urb(ucs->bulk_out_urb);
845         kfree(cs->inbuf[0].rcvbuf);
846         usb_free_urb(ucs->read_urb);
847         ucs->read_urb = ucs->bulk_out_urb = NULL;
848         cs->inbuf[0].rcvbuf = ucs->bulk_out_buffer = NULL;
849
850         usb_put_dev(ucs->udev);
851         ucs->interface = NULL;
852         ucs->udev = NULL;
853         cs->dev = NULL;
854         gigaset_freecs(cs);
855 }
856
857 /* gigaset_suspend
858  * This function is called before the USB connection is suspended or reset.
859  */
860 static int gigaset_suspend(struct usb_interface *intf, pm_message_t message)
861 {
862         struct cardstate *cs = usb_get_intfdata(intf);
863
864         /* stop activity */
865         cs->connected = 0;      /* prevent rescheduling */
866         usb_kill_urb(cs->hw.usb->read_urb);
867         tasklet_kill(&cs->write_tasklet);
868         usb_kill_urb(cs->hw.usb->bulk_out_urb);
869
870         gig_dbg(DEBUG_SUSPEND, "suspend complete");
871         return 0;
872 }
873
874 /* gigaset_resume
875  * This function is called after the USB connection has been resumed or reset.
876  */
877 static int gigaset_resume(struct usb_interface *intf)
878 {
879         struct cardstate *cs = usb_get_intfdata(intf);
880         int rc;
881
882         /* resubmit interrupt URB */
883         cs->connected = 1;
884         rc = usb_submit_urb(cs->hw.usb->read_urb, GFP_KERNEL);
885         if (rc) {
886                 dev_err(cs->dev, "Could not submit read URB (error %d)\n", -rc);
887                 return rc;
888         }
889
890         gig_dbg(DEBUG_SUSPEND, "resume complete");
891         return 0;
892 }
893
894 /* gigaset_pre_reset
895  * This function is called before the USB connection is reset.
896  */
897 static int gigaset_pre_reset(struct usb_interface *intf)
898 {
899         /* same as suspend */
900         return gigaset_suspend(intf, PMSG_ON);
901 }
902
903 static const struct gigaset_ops ops = {
904         gigaset_write_cmd,
905         gigaset_write_room,
906         gigaset_chars_in_buffer,
907         gigaset_brkchars,
908         gigaset_init_bchannel,
909         gigaset_close_bchannel,
910         gigaset_initbcshw,
911         gigaset_freebcshw,
912         gigaset_reinitbcshw,
913         gigaset_initcshw,
914         gigaset_freecshw,
915         gigaset_set_modem_ctrl,
916         gigaset_baud_rate,
917         gigaset_set_line_ctrl,
918         gigaset_m10x_send_skb,
919         gigaset_m10x_input,
920 };
921
922 /**
923  *      usb_gigaset_init
924  * This function is called while kernel-module is loaded
925  */
926 static int __init usb_gigaset_init(void)
927 {
928         int result;
929
930         /* allocate memory for our driver state and intialize it */
931         if ((driver = gigaset_initdriver(GIGASET_MINOR, GIGASET_MINORS,
932                                        GIGASET_MODULENAME, GIGASET_DEVNAME,
933                                        &ops, THIS_MODULE)) == NULL)
934                 goto error;
935
936         /* register this driver with the USB subsystem */
937         result = usb_register(&gigaset_usb_driver);
938         if (result < 0) {
939                 err("usb_gigaset: usb_register failed (error %d)",
940                     -result);
941                 goto error;
942         }
943
944         printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n");
945         return 0;
946
947 error:
948         if (driver)
949                 gigaset_freedriver(driver);
950         driver = NULL;
951         return -1;
952 }
953
954
955 /**
956  *      usb_gigaset_exit
957  * This function is called while unloading the kernel-module
958  */
959 static void __exit usb_gigaset_exit(void)
960 {
961         int i;
962
963         gigaset_blockdriver(driver); /* => probe will fail
964                                       * => no gigaset_start any more
965                                       */
966
967         /* stop all connected devices */
968         for (i = 0; i < driver->minors; i++)
969                 gigaset_shutdown(driver->cs + i);
970
971         /* from now on, no isdn callback should be possible */
972
973         /* deregister this driver with the USB subsystem */
974         usb_deregister(&gigaset_usb_driver);
975         /* this will call the disconnect-callback */
976         /* from now on, no disconnect/probe callback should be running */
977
978         gigaset_freedriver(driver);
979         driver = NULL;
980 }
981
982
983 module_init(usb_gigaset_init);
984 module_exit(usb_gigaset_exit);
985
986 MODULE_AUTHOR(DRIVER_AUTHOR);
987 MODULE_DESCRIPTION(DRIVER_DESC);
988
989 MODULE_LICENSE("GPL");