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[deliverable/linux.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 <Eilers.Stefan@epost.de>
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 * ToDo: ...
17 * =====================================================================
18 * Version: $Id: usb-gigaset.c,v 1.85.4.18 2006/02/04 18:28:16 hjlipp Exp $
19 * =====================================================================
20 */
21
22 #include "gigaset.h"
23
24 #include <linux/errno.h>
25 #include <linux/init.h>
26 #include <linux/slab.h>
27 #include <linux/usb.h>
28 #include <linux/module.h>
29 #include <linux/moduleparam.h>
30
31 /* Version Information */
32 #define DRIVER_AUTHOR "Hansjoerg Lipp <hjlipp@web.de>, Stefan Eilers <Eilers.Stefan@epost.de>"
33 #define DRIVER_DESC "USB Driver for Gigaset 307x using M105"
34
35 /* Module parameters */
36
37 static int startmode = SM_ISDN;
38 static int cidmode = 1;
39
40 module_param(startmode, int, S_IRUGO);
41 module_param(cidmode, int, S_IRUGO);
42 MODULE_PARM_DESC(startmode, "start in isdn4linux mode");
43 MODULE_PARM_DESC(cidmode, "Call-ID mode");
44
45 #define GIGASET_MINORS 1
46 #define GIGASET_MINOR 8
47 #define GIGASET_MODULENAME "usb_gigaset"
48 #define GIGASET_DEVFSNAME "gig/usb/"
49 #define GIGASET_DEVNAME "ttyGU"
50
51 #define IF_WRITEBUF 2000 //FIXME // WAKEUP_CHARS: 256
52
53 /* Values for the Gigaset M105 Data */
54 #define USB_M105_VENDOR_ID 0x0681
55 #define USB_M105_PRODUCT_ID 0x0009
56
57 /* table of devices that work with this driver */
58 static struct usb_device_id gigaset_table [] = {
59 { USB_DEVICE(USB_M105_VENDOR_ID, USB_M105_PRODUCT_ID) },
60 { } /* Terminating entry */
61 };
62
63 MODULE_DEVICE_TABLE(usb, gigaset_table);
64
65 /* Get a minor range for your devices from the usb maintainer */
66 #define USB_SKEL_MINOR_BASE 200
67
68
69 /*
70 * Control requests (empty fields: 00)
71 *
72 * RT|RQ|VALUE|INDEX|LEN |DATA
73 * In:
74 * C1 08 01
75 * Get flags (1 byte). Bits: 0=dtr,1=rts,3-7:?
76 * C1 0F ll ll
77 * Get device information/status (llll: 0x200 and 0x40 seen).
78 * Real size: I only saw MIN(llll,0x64).
79 * Contents: seems to be always the same...
80 * offset 0x00: Length of this structure (0x64) (len: 1,2,3 bytes)
81 * offset 0x3c: String (16 bit chars): "MCCI USB Serial V2.0"
82 * rest: ?
83 * Out:
84 * 41 11
85 * Initialize/reset device ?
86 * 41 00 xx 00
87 * ? (xx=00 or 01; 01 on start, 00 on close)
88 * 41 07 vv mm
89 * Set/clear flags vv=value, mm=mask (see RQ 08)
90 * 41 12 xx
91 * Used before the following configuration requests are issued
92 * (with xx=0x0f). I've seen other values<0xf, though.
93 * 41 01 xx xx
94 * Set baud rate. xxxx=ceil(0x384000/rate)=trunc(0x383fff/rate)+1.
95 * 41 03 ps bb
96 * Set byte size and parity. p: 0x20=even,0x10=odd,0x00=no parity
97 * [ 0x30: m, 0x40: s ]
98 * [s: 0: 1 stop bit; 1: 1.5; 2: 2]
99 * bb: bits/byte (seen 7 and 8)
100 * 41 13 -- -- -- -- 10 00 ww 00 00 00 xx 00 00 00 yy 00 00 00 zz 00 00 00
101 * ??
102 * Initialization: 01, 40, 00, 00
103 * Open device: 00 40, 00, 00
104 * yy and zz seem to be equal, either 0x00 or 0x0a
105 * (ww,xx) pairs seen: (00,00), (00,40), (01,40), (09,80), (19,80)
106 * 41 19 -- -- -- -- 06 00 00 00 00 xx 11 13
107 * Used after every "configuration sequence" (RQ 12, RQs 01/03/13).
108 * xx is usually 0x00 but was 0x7e before starting data transfer
109 * in unimodem mode. So, this might be an array of characters that need
110 * special treatment ("commit all bufferd data"?), 11=^Q, 13=^S.
111 *
112 * Unimodem mode: use "modprobe ppp_async flag_time=0" as the device _needs_ two
113 * flags per packet.
114 */
115
116 static int gigaset_probe(struct usb_interface *interface,
117 const struct usb_device_id *id);
118 static void gigaset_disconnect(struct usb_interface *interface);
119
120 static struct gigaset_driver *driver = NULL;
121 static struct cardstate *cardstate = NULL;
122
123 /* usb specific object needed to register this driver with the usb subsystem */
124 static struct usb_driver gigaset_usb_driver = {
125 .name = GIGASET_MODULENAME,
126 .probe = gigaset_probe,
127 .disconnect = gigaset_disconnect,
128 .id_table = gigaset_table,
129 };
130
131 struct usb_cardstate {
132 struct usb_device *udev; /* save off the usb device pointer */
133 struct usb_interface *interface; /* the interface for this device */
134 atomic_t busy; /* bulk output in progress */
135
136 /* Output buffer for commands (M105: and data)*/
137 unsigned char *bulk_out_buffer; /* the buffer to send data */
138 int bulk_out_size; /* the size of the send buffer */
139 __u8 bulk_out_endpointAddr; /* the address of the bulk out endpoint */
140 struct urb *bulk_out_urb; /* the urb used to transmit data */
141
142 /* Input buffer for command responses (M105: and data)*/
143 int rcvbuf_size; /* the size of the receive buffer */
144 struct urb *read_urb; /* the urb used to receive data */
145 __u8 int_in_endpointAddr; /* the address of the bulk in endpoint */
146
147 char bchars[6]; /* req. 0x19 */
148 };
149
150 struct usb_bc_state {};
151
152 static inline unsigned tiocm_to_gigaset(unsigned state)
153 {
154 return ((state & TIOCM_DTR) ? 1 : 0) | ((state & TIOCM_RTS) ? 2 : 0);
155 }
156
157 #ifdef CONFIG_GIGASET_UNDOCREQ
158 /* WARNING: EXPERIMENTAL! */
159 static int gigaset_set_modem_ctrl(struct cardstate *cs, unsigned old_state,
160 unsigned new_state)
161 {
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 dbg(DEBUG_USBREQ, "set flags 0x%02x with mask 0x%02x", val, mask);
169 r = usb_control_msg(cs->hw.usb->udev,
170 usb_sndctrlpipe(cs->hw.usb->udev, 0), 7, 0x41,
171 (val & 0xff) | ((mask & 0xff) << 8), 0,
172 NULL, 0, 2000 /*timeout??*/); // don't use this in an interrupt/BH
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 int r, r2;
182
183 dbg(DEBUG_USBREQ, "request %02x (%04x)", (unsigned)req, (unsigned)val);
184 r = usb_control_msg(cs->hw.usb->udev,
185 usb_sndctrlpipe(cs->hw.usb->udev, 0), 0x12, 0x41,
186 0xf /*?*/, 0,
187 NULL, 0, 2000 /*?*/); /* no idea, what this does */
188 if (r < 0) {
189 err("error %d on request 0x12", -r);
190 return r;
191 }
192
193 r = usb_control_msg(cs->hw.usb->udev,
194 usb_sndctrlpipe(cs->hw.usb->udev, 0), req, 0x41,
195 val, 0,
196 NULL, 0, 2000 /*?*/);
197 if (r < 0)
198 err("error %d on request 0x%02x", -r, (unsigned)req);
199
200 r2 = usb_control_msg(cs->hw.usb->udev,
201 usb_sndctrlpipe(cs->hw.usb->udev, 0), 0x19, 0x41,
202 0, 0, cs->hw.usb->bchars, 6, 2000 /*?*/);
203 if (r2 < 0)
204 err("error %d on request 0x19", -r2);
205
206 return r < 0 ? r : (r2 < 0 ? r2 : 0);
207 }
208
209 /* WARNING: HIGHLY EXPERIMENTAL! */
210 // don't use this in an interrupt/BH
211 static int gigaset_baud_rate(struct cardstate *cs, unsigned cflag)
212 {
213 u16 val;
214 u32 rate;
215
216 cflag &= CBAUD;
217
218 switch (cflag) {
219 //FIXME more values?
220 case B300: rate = 300; break;
221 case B600: rate = 600; break;
222 case B1200: rate = 1200; break;
223 case B2400: rate = 2400; break;
224 case B4800: rate = 4800; break;
225 case B9600: rate = 9600; break;
226 case B19200: rate = 19200; break;
227 case B38400: rate = 38400; break;
228 case B57600: rate = 57600; break;
229 case B115200: rate = 115200; break;
230 default:
231 rate = 9600;
232 err("unsupported baudrate request 0x%x,"
233 " using default of B9600", cflag);
234 }
235
236 val = 0x383fff / rate + 1;
237
238 return set_value(cs, 1, val);
239 }
240
241 /* WARNING: HIGHLY EXPERIMENTAL! */
242 // don't use this in an interrupt/BH
243 static int gigaset_set_line_ctrl(struct cardstate *cs, unsigned cflag)
244 {
245 u16 val = 0;
246
247 /* set the parity */
248 if (cflag & PARENB)
249 val |= (cflag & PARODD) ? 0x10 : 0x20;
250
251 /* set the number of data bits */
252 switch (cflag & CSIZE) {
253 case CS5:
254 val |= 5 << 8; break;
255 case CS6:
256 val |= 6 << 8; break;
257 case CS7:
258 val |= 7 << 8; break;
259 case CS8:
260 val |= 8 << 8; break;
261 default:
262 err("CSIZE was not CS5-CS8, using default of 8");
263 val |= 8 << 8;
264 break;
265 }
266
267 /* set the number of stop bits */
268 if (cflag & CSTOPB) {
269 if ((cflag & CSIZE) == CS5)
270 val |= 1; /* 1.5 stop bits */ //FIXME is this okay?
271 else
272 val |= 2; /* 2 stop bits */
273 }
274
275 return set_value(cs, 3, val);
276 }
277
278 #else
279 static int gigaset_set_modem_ctrl(struct cardstate *cs, unsigned old_state,
280 unsigned new_state)
281 {
282 return -EINVAL;
283 }
284
285 static int gigaset_set_line_ctrl(struct cardstate *cs, unsigned cflag)
286 {
287 return -EINVAL;
288 }
289
290 static int gigaset_baud_rate(struct cardstate *cs, unsigned cflag)
291 {
292 return -EINVAL;
293 }
294 #endif
295
296
297 /*================================================================================================================*/
298 static int gigaset_init_bchannel(struct bc_state *bcs)
299 {
300 /* nothing to do for M10x */
301 gigaset_bchannel_up(bcs);
302 return 0;
303 }
304
305 static int gigaset_close_bchannel(struct bc_state *bcs)
306 {
307 /* nothing to do for M10x */
308 gigaset_bchannel_down(bcs);
309 return 0;
310 }
311
312 //void send_ack_to_LL(void *data);
313 static int write_modem(struct cardstate *cs);
314 static int send_cb(struct cardstate *cs, struct cmdbuf_t *cb);
315
316
317 /* Handling of send queue. If there is already a skb opened, put data to
318 * the transfer buffer by calling "write_modem". Otherwise take a new skb out of the queue.
319 * This function will be called by the ISR via "transmit_chars" (USB: B-Channel Bulk callback handler
320 * via immediate task queue) or by writebuf_from_LL if the LL wants to transmit data.
321 */
322 static void gigaset_modem_fill(unsigned long data)
323 {
324 struct cardstate *cs = (struct cardstate *) data;
325 struct bc_state *bcs = &cs->bcs[0]; /* only one channel */
326 struct cmdbuf_t *cb;
327 unsigned long flags;
328 int again;
329
330 dbg(DEBUG_OUTPUT, "modem_fill");
331
332 if (atomic_read(&cs->hw.usb->busy)) {
333 dbg(DEBUG_OUTPUT, "modem_fill: busy");
334 return;
335 }
336
337 do {
338 again = 0;
339 if (!bcs->tx_skb) { /* no skb is being sent */
340 spin_lock_irqsave(&cs->cmdlock, flags);
341 cb = cs->cmdbuf;
342 spin_unlock_irqrestore(&cs->cmdlock, flags);
343 if (cb) { /* commands to send? */
344 dbg(DEBUG_OUTPUT, "modem_fill: cb");
345 if (send_cb(cs, cb) < 0) {
346 dbg(DEBUG_OUTPUT,
347 "modem_fill: send_cb failed");
348 again = 1; /* no callback will be called! */
349 }
350 } else { /* skbs to send? */
351 bcs->tx_skb = skb_dequeue(&bcs->squeue);
352 if (bcs->tx_skb)
353 dbg(DEBUG_INTR,
354 "Dequeued skb (Adr: %lx)!",
355 (unsigned long) bcs->tx_skb);
356 }
357 }
358
359 if (bcs->tx_skb) {
360 dbg(DEBUG_OUTPUT, "modem_fill: tx_skb");
361 if (write_modem(cs) < 0) {
362 dbg(DEBUG_OUTPUT,
363 "modem_fill: write_modem failed");
364 // FIXME should we tell the LL?
365 again = 1; /* no callback will be called! */
366 }
367 }
368 } while (again);
369 }
370
371 /**
372 * gigaset_read_int_callback
373 *
374 * It is called if the data was received from the device. This is almost similiar to
375 * the interrupt service routine in the serial device.
376 */
377 static void gigaset_read_int_callback(struct urb *urb, struct pt_regs *regs)
378 {
379 int resubmit = 0;
380 int r;
381 struct cardstate *cs;
382 unsigned numbytes;
383 unsigned char *src;
384 //unsigned long flags;
385 struct inbuf_t *inbuf;
386
387 IFNULLRET(urb);
388 inbuf = (struct inbuf_t *) urb->context;
389 IFNULLRET(inbuf);
390 //spin_lock_irqsave(&inbuf->lock, flags);
391 cs = inbuf->cs;
392 IFNULLGOTO(cs, exit);
393 IFNULLGOTO(cardstate, exit);
394
395 if (!atomic_read(&cs->connected)) {
396 err("%s: disconnected", __func__);
397 goto exit;
398 }
399
400 if (!urb->status) {
401 numbytes = urb->actual_length;
402
403 if (numbytes) {
404 src = inbuf->rcvbuf;
405 if (unlikely(*src))
406 warn("%s: There was no leading 0, but 0x%02x!",
407 __func__, (unsigned) *src);
408 ++src; /* skip leading 0x00 */
409 --numbytes;
410 if (gigaset_fill_inbuf(inbuf, src, numbytes)) {
411 dbg(DEBUG_INTR, "%s-->BH", __func__);
412 gigaset_schedule_event(inbuf->cs);
413 }
414 } else
415 dbg(DEBUG_INTR, "Received zero block length");
416 resubmit = 1;
417 } else {
418 /* The urb might have been killed. */
419 dbg(DEBUG_ANY, "%s - nonzero read bulk status received: %d",
420 __func__, urb->status);
421 if (urb->status != -ENOENT) /* not killed */
422 resubmit = 1;
423 }
424 exit:
425 //spin_unlock_irqrestore(&inbuf->lock, flags);
426 if (resubmit) {
427 r = usb_submit_urb(urb, SLAB_ATOMIC);
428 if (r)
429 err("error %d when resubmitting urb.", -r);
430 }
431 }
432
433
434 /* This callback routine is called when data was transmitted to a B-Channel.
435 * Therefore it has to check if there is still data to transmit. This
436 * happens by calling modem_fill via task queue.
437 *
438 */
439 static void gigaset_write_bulk_callback(struct urb *urb, struct pt_regs *regs)
440 {
441 struct cardstate *cs = (struct cardstate *) urb->context;
442
443 IFNULLRET(cs);
444 #ifdef CONFIG_GIGASET_DEBUG
445 if (!atomic_read(&cs->connected)) {
446 err("%s:not connected", __func__);
447 return;
448 }
449 #endif
450 if (urb->status)
451 err("bulk transfer failed (status %d)", -urb->status); /* That's all we can do. Communication problems
452 are handeled by timeouts or network protocols */
453
454 atomic_set(&cs->hw.usb->busy, 0);
455 tasklet_schedule(&cs->write_tasklet);
456 }
457
458 static int send_cb(struct cardstate *cs, struct cmdbuf_t *cb)
459 {
460 struct cmdbuf_t *tcb;
461 unsigned long flags;
462 int count;
463 int status = -ENOENT; // FIXME
464 struct usb_cardstate *ucs = cs->hw.usb;
465
466 do {
467 if (!cb->len) {
468 tcb = cb;
469
470 spin_lock_irqsave(&cs->cmdlock, flags);
471 cs->cmdbytes -= cs->curlen;
472 dbg(DEBUG_OUTPUT, "send_cb: sent %u bytes, %u left",
473 cs->curlen, cs->cmdbytes);
474 cs->cmdbuf = cb = cb->next;
475 if (cb) {
476 cb->prev = NULL;
477 cs->curlen = cb->len;
478 } else {
479 cs->lastcmdbuf = NULL;
480 cs->curlen = 0;
481 }
482 spin_unlock_irqrestore(&cs->cmdlock, flags);
483
484 if (tcb->wake_tasklet)
485 tasklet_schedule(tcb->wake_tasklet);
486 kfree(tcb);
487 }
488 if (cb) {
489 count = min(cb->len, ucs->bulk_out_size);
490 usb_fill_bulk_urb(ucs->bulk_out_urb, ucs->udev,
491 usb_sndbulkpipe(ucs->udev,
492 ucs->bulk_out_endpointAddr & 0x0f),
493 cb->buf + cb->offset, count,
494 gigaset_write_bulk_callback, cs);
495
496 cb->offset += count;
497 cb->len -= count;
498 atomic_set(&ucs->busy, 1);
499 dbg(DEBUG_OUTPUT, "send_cb: send %d bytes", count);
500
501 status = usb_submit_urb(ucs->bulk_out_urb, SLAB_ATOMIC);
502 if (status) {
503 atomic_set(&ucs->busy, 0);
504 err("could not submit urb (error %d).",
505 -status);
506 cb->len = 0; /* skip urb => remove cb+wakeup in next loop cycle */
507 }
508 }
509 } while (cb && status); /* bei Fehler naechster Befehl //FIXME: ist das OK? */
510
511 return status;
512 }
513
514 /* Write string into transbuf and send it to modem.
515 */
516 static int gigaset_write_cmd(struct cardstate *cs, const unsigned char *buf,
517 int len, struct tasklet_struct *wake_tasklet)
518 {
519 struct cmdbuf_t *cb;
520 unsigned long flags;
521
522 gigaset_dbg_buffer(atomic_read(&cs->mstate) != MS_LOCKED ?
523 DEBUG_TRANSCMD : DEBUG_LOCKCMD,
524 "CMD Transmit", len, buf, 0);
525
526 if (!atomic_read(&cs->connected)) {
527 err("%s: not connected", __func__);
528 return -ENODEV;
529 }
530
531 if (len <= 0)
532 return 0;
533
534 if (!(cb = kmalloc(sizeof(struct cmdbuf_t) + len, GFP_ATOMIC))) {
535 err("%s: out of memory", __func__);
536 return -ENOMEM;
537 }
538
539 memcpy(cb->buf, buf, len);
540 cb->len = len;
541 cb->offset = 0;
542 cb->next = NULL;
543 cb->wake_tasklet = wake_tasklet;
544
545 spin_lock_irqsave(&cs->cmdlock, flags);
546 cb->prev = cs->lastcmdbuf;
547 if (cs->lastcmdbuf)
548 cs->lastcmdbuf->next = cb;
549 else {
550 cs->cmdbuf = cb;
551 cs->curlen = len;
552 }
553 cs->cmdbytes += len;
554 cs->lastcmdbuf = cb;
555 spin_unlock_irqrestore(&cs->cmdlock, flags);
556
557 tasklet_schedule(&cs->write_tasklet);
558 return len;
559 }
560
561 static int gigaset_write_room(struct cardstate *cs)
562 {
563 unsigned long flags;
564 unsigned bytes;
565
566 spin_lock_irqsave(&cs->cmdlock, flags);
567 bytes = cs->cmdbytes;
568 spin_unlock_irqrestore(&cs->cmdlock, flags);
569
570 return bytes < IF_WRITEBUF ? IF_WRITEBUF - bytes : 0;
571 }
572
573 static int gigaset_chars_in_buffer(struct cardstate *cs)
574 {
575 return cs->cmdbytes;
576 }
577
578 static int gigaset_brkchars(struct cardstate *cs, const unsigned char buf[6])
579 {
580 #ifdef CONFIG_GIGASET_UNDOCREQ
581 gigaset_dbg_buffer(DEBUG_USBREQ, "brkchars", 6, buf, 0);
582 memcpy(cs->hw.usb->bchars, buf, 6);
583 return usb_control_msg(cs->hw.usb->udev,
584 usb_sndctrlpipe(cs->hw.usb->udev, 0), 0x19, 0x41,
585 0, 0, &buf, 6, 2000);
586 #else
587 return -EINVAL;
588 #endif
589 }
590
591 static int gigaset_freebcshw(struct bc_state *bcs)
592 {
593 if (!bcs->hw.usb)
594 return 0;
595 //FIXME
596 kfree(bcs->hw.usb);
597 return 1;
598 }
599
600 /* Initialize the b-channel structure */
601 static int gigaset_initbcshw(struct bc_state *bcs)
602 {
603 bcs->hw.usb = kmalloc(sizeof(struct usb_bc_state), GFP_KERNEL);
604 if (!bcs->hw.usb)
605 return 0;
606
607 //bcs->hw.usb->trans_flg = READY_TO_TRNSMIT; /* B-Channel ready to transmit */
608 return 1;
609 }
610
611 static void gigaset_reinitbcshw(struct bc_state *bcs)
612 {
613 }
614
615 static void gigaset_freecshw(struct cardstate *cs)
616 {
617 //FIXME
618 tasklet_kill(&cs->write_tasklet);
619 kfree(cs->hw.usb);
620 }
621
622 static int gigaset_initcshw(struct cardstate *cs)
623 {
624 struct usb_cardstate *ucs;
625
626 cs->hw.usb = ucs =
627 kmalloc(sizeof(struct usb_cardstate), GFP_KERNEL);
628 if (!ucs)
629 return 0;
630
631 ucs->bchars[0] = 0;
632 ucs->bchars[1] = 0;
633 ucs->bchars[2] = 0;
634 ucs->bchars[3] = 0;
635 ucs->bchars[4] = 0x11;
636 ucs->bchars[5] = 0x13;
637 ucs->bulk_out_buffer = NULL;
638 ucs->bulk_out_urb = NULL;
639 //ucs->urb_cmd_out = NULL;
640 ucs->read_urb = NULL;
641 tasklet_init(&cs->write_tasklet,
642 &gigaset_modem_fill, (unsigned long) cs);
643
644 return 1;
645 }
646
647 /* Writes the data of the current open skb into the modem.
648 * We have to protect against multiple calls until the
649 * callback handler () is called , due to the fact that we
650 * are just allowed to send data once to an endpoint. Therefore
651 * we using "trans_flg" to synchonize ...
652 */
653 static int write_modem(struct cardstate *cs)
654 {
655 int ret;
656 int count;
657 struct bc_state *bcs = &cs->bcs[0]; /* only one channel */
658 struct usb_cardstate *ucs = cs->hw.usb;
659 //unsigned long flags;
660
661 IFNULLRETVAL(bcs->tx_skb, -EINVAL);
662
663 dbg(DEBUG_WRITE, "len: %d...", bcs->tx_skb->len);
664
665 ret = -ENODEV;
666 IFNULLGOTO(ucs->bulk_out_buffer, error);
667 IFNULLGOTO(ucs->bulk_out_urb, error);
668 ret = 0;
669
670 if (!bcs->tx_skb->len) {
671 dev_kfree_skb_any(bcs->tx_skb);
672 bcs->tx_skb = NULL;
673 return -EINVAL;
674 }
675
676 /* Copy data to bulk out buffer and // FIXME copying not necessary
677 * transmit data
678 */
679 count = min(bcs->tx_skb->len, (unsigned) ucs->bulk_out_size);
680 memcpy(ucs->bulk_out_buffer, bcs->tx_skb->data, count);
681 skb_pull(bcs->tx_skb, count);
682
683 usb_fill_bulk_urb(ucs->bulk_out_urb, ucs->udev,
684 usb_sndbulkpipe(ucs->udev,
685 ucs->bulk_out_endpointAddr & 0x0f),
686 ucs->bulk_out_buffer, count,
687 gigaset_write_bulk_callback, cs);
688 atomic_set(&ucs->busy, 1);
689 dbg(DEBUG_OUTPUT, "write_modem: send %d bytes", count);
690
691 ret = usb_submit_urb(ucs->bulk_out_urb, SLAB_ATOMIC);
692 if (ret) {
693 err("could not submit urb (error %d).", -ret);
694 atomic_set(&ucs->busy, 0);
695 }
696 if (!bcs->tx_skb->len) {
697 /* skb sent completely */
698 gigaset_skb_sent(bcs, bcs->tx_skb); //FIXME also, when ret<0?
699
700 dbg(DEBUG_INTR,
701 "kfree skb (Adr: %lx)!", (unsigned long) bcs->tx_skb);
702 dev_kfree_skb_any(bcs->tx_skb);
703 bcs->tx_skb = NULL;
704 }
705
706 return ret;
707 error:
708 dev_kfree_skb_any(bcs->tx_skb);
709 bcs->tx_skb = NULL;
710 return ret;
711
712 }
713
714 static int gigaset_probe(struct usb_interface *interface,
715 const struct usb_device_id *id)
716 {
717 int retval;
718 struct usb_device *udev = interface_to_usbdev(interface);
719 unsigned int ifnum;
720 struct usb_host_interface *hostif;
721 struct cardstate *cs = NULL;
722 struct usb_cardstate *ucs = NULL;
723 //struct usb_interface_descriptor *iface_desc;
724 struct usb_endpoint_descriptor *endpoint;
725 //isdn_ctrl command;
726 int buffer_size;
727 int alt;
728 //unsigned long flags;
729
730 info("%s: Check if device matches .. (Vendor: 0x%x, Product: 0x%x)",
731 __func__, le16_to_cpu(udev->descriptor.idVendor),
732 le16_to_cpu(udev->descriptor.idProduct));
733
734 retval = -ENODEV; //FIXME
735
736 /* See if the device offered us matches what we can accept */
737 if ((le16_to_cpu(udev->descriptor.idVendor != USB_M105_VENDOR_ID)) ||
738 (le16_to_cpu(udev->descriptor.idProduct != USB_M105_PRODUCT_ID)))
739 return -ENODEV;
740
741 /* this starts to become ascii art... */
742 hostif = interface->cur_altsetting;
743 alt = hostif->desc.bAlternateSetting;
744 ifnum = hostif->desc.bInterfaceNumber; // FIXME ?
745
746 if (alt != 0 || ifnum != 0) {
747 warn("ifnum %d, alt %d", ifnum, alt);
748 return -ENODEV;
749 }
750
751 /* Reject application specific intefaces
752 *
753 */
754 if (hostif->desc.bInterfaceClass != 255) {
755 info("%s: Device matched, but iface_desc[%d]->bInterfaceClass==%d !",
756 __func__, ifnum, hostif->desc.bInterfaceClass);
757 return -ENODEV;
758 }
759
760 info("%s: Device matched ... !", __func__);
761
762 cs = gigaset_getunassignedcs(driver);
763 if (!cs) {
764 warn("No free cardstate!");
765 return -ENODEV;
766 }
767 ucs = cs->hw.usb;
768
769 #if 0
770 if (usb_set_configuration(udev, udev->config[0].desc.bConfigurationValue) < 0) {
771 warn("set_configuration failed");
772 goto error;
773 }
774
775
776 if (usb_set_interface(udev, ifnum/*==0*/, alt/*==0*/) < 0) {
777 warn("usb_set_interface failed, device %d interface %d altsetting %d",
778 udev->devnum, ifnum, alt);
779 goto error;
780 }
781 #endif
782
783 /* set up the endpoint information */
784 /* check out the endpoints */
785 /* We will get 2 endpoints: One for sending commands to the device (bulk out) and one to
786 * poll messages from the device(int in).
787 * Therefore we will have an almost similiar situation as with our serial port handler.
788 * If an connection will be established, we will have to create data in/out pipes
789 * dynamically...
790 */
791
792 endpoint = &hostif->endpoint[0].desc;
793
794 buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
795 ucs->bulk_out_size = buffer_size;
796 ucs->bulk_out_endpointAddr = endpoint->bEndpointAddress;
797 ucs->bulk_out_buffer = kmalloc(buffer_size, GFP_KERNEL);
798 if (!ucs->bulk_out_buffer) {
799 err("Couldn't allocate bulk_out_buffer");
800 retval = -ENOMEM;
801 goto error;
802 }
803
804 ucs->bulk_out_urb = usb_alloc_urb(0, SLAB_KERNEL);
805 if (!ucs->bulk_out_urb) {
806 err("Couldn't allocate bulk_out_buffer");
807 retval = -ENOMEM;
808 goto error;
809 }
810
811 endpoint = &hostif->endpoint[1].desc;
812
813 atomic_set(&ucs->busy, 0);
814 ucs->udev = udev;
815 ucs->interface = interface;
816
817 ucs->read_urb = usb_alloc_urb(0, SLAB_KERNEL);
818 if (!ucs->read_urb) {
819 err("No free urbs available");
820 retval = -ENOMEM;
821 goto error;
822 }
823 buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
824 ucs->rcvbuf_size = buffer_size;
825 ucs->int_in_endpointAddr = endpoint->bEndpointAddress;
826 cs->inbuf[0].rcvbuf = kmalloc(buffer_size, GFP_KERNEL);
827 if (!cs->inbuf[0].rcvbuf) {
828 err("Couldn't allocate rcvbuf");
829 retval = -ENOMEM;
830 goto error;
831 }
832 /* Fill the interrupt urb and send it to the core */
833 usb_fill_int_urb(ucs->read_urb, udev,
834 usb_rcvintpipe(udev,
835 endpoint->bEndpointAddress & 0x0f),
836 cs->inbuf[0].rcvbuf, buffer_size,
837 gigaset_read_int_callback,
838 cs->inbuf + 0, endpoint->bInterval);
839
840 retval = usb_submit_urb(ucs->read_urb, SLAB_KERNEL);
841 if (retval) {
842 err("Could not submit URB!");
843 goto error;
844 }
845
846 /* tell common part that the device is ready */
847 if (startmode == SM_LOCKED)
848 atomic_set(&cs->mstate, MS_LOCKED);
849 if (!gigaset_start(cs)) {
850 tasklet_kill(&cs->write_tasklet);
851 retval = -ENODEV; //FIXME
852 goto error;
853 }
854
855 /* save address of controller structure */
856 usb_set_intfdata(interface, cs);
857
858 /* set up device sysfs */
859 gigaset_init_dev_sysfs(interface);
860 return 0;
861
862 error:
863 if (ucs->read_urb)
864 usb_kill_urb(ucs->read_urb);
865 kfree(ucs->bulk_out_buffer);
866 if (ucs->bulk_out_urb != NULL)
867 usb_free_urb(ucs->bulk_out_urb);
868 kfree(cs->inbuf[0].rcvbuf);
869 if (ucs->read_urb != NULL)
870 usb_free_urb(ucs->read_urb);
871 ucs->read_urb = ucs->bulk_out_urb = NULL;
872 cs->inbuf[0].rcvbuf = ucs->bulk_out_buffer = NULL;
873 gigaset_unassign(cs);
874 return retval;
875 }
876
877 /**
878 * skel_disconnect
879 */
880 static void gigaset_disconnect(struct usb_interface *interface)
881 {
882 struct cardstate *cs;
883 struct usb_cardstate *ucs;
884
885 cs = usb_get_intfdata(interface);
886
887 /* clear device sysfs */
888 gigaset_free_dev_sysfs(interface);
889
890 usb_set_intfdata(interface, NULL);
891 ucs = cs->hw.usb;
892 usb_kill_urb(ucs->read_urb);
893 //info("GigaSet USB device #%d will be disconnected", minor);
894
895 gigaset_stop(cs);
896
897 tasklet_kill(&cs->write_tasklet);
898
899 usb_kill_urb(ucs->bulk_out_urb); /* FIXME: nur, wenn noetig */
900 //usb_kill_urb(ucs->urb_cmd_out); /* FIXME: nur, wenn noetig */
901
902 kfree(ucs->bulk_out_buffer);
903 if (ucs->bulk_out_urb != NULL)
904 usb_free_urb(ucs->bulk_out_urb);
905 //if(ucs->urb_cmd_out != NULL)
906 // usb_free_urb(ucs->urb_cmd_out);
907 kfree(cs->inbuf[0].rcvbuf);
908 if (ucs->read_urb != NULL)
909 usb_free_urb(ucs->read_urb);
910 ucs->read_urb = ucs->bulk_out_urb/*=ucs->urb_cmd_out*/=NULL;
911 cs->inbuf[0].rcvbuf = ucs->bulk_out_buffer = NULL;
912
913 gigaset_unassign(cs);
914 }
915
916 static struct gigaset_ops ops = {
917 gigaset_write_cmd,
918 gigaset_write_room,
919 gigaset_chars_in_buffer,
920 gigaset_brkchars,
921 gigaset_init_bchannel,
922 gigaset_close_bchannel,
923 gigaset_initbcshw,
924 gigaset_freebcshw,
925 gigaset_reinitbcshw,
926 gigaset_initcshw,
927 gigaset_freecshw,
928 gigaset_set_modem_ctrl,
929 gigaset_baud_rate,
930 gigaset_set_line_ctrl,
931 gigaset_m10x_send_skb,
932 gigaset_m10x_input,
933 };
934
935 /**
936 * usb_gigaset_init
937 * This function is called while kernel-module is loaded
938 */
939 static int __init usb_gigaset_init(void)
940 {
941 int result;
942
943 /* allocate memory for our driver state and intialize it */
944 if ((driver = gigaset_initdriver(GIGASET_MINOR, GIGASET_MINORS,
945 GIGASET_MODULENAME, GIGASET_DEVNAME,
946 GIGASET_DEVFSNAME, &ops,
947 THIS_MODULE)) == NULL)
948 goto error;
949
950 /* allocate memory for our device state and intialize it */
951 cardstate = gigaset_initcs(driver, 1, 1, 0, cidmode, GIGASET_MODULENAME);
952 if (!cardstate)
953 goto error;
954
955 /* register this driver with the USB subsystem */
956 result = usb_register(&gigaset_usb_driver);
957 if (result < 0) {
958 err("usb_gigaset: usb_register failed (error %d)",
959 -result);
960 goto error;
961 }
962
963 info(DRIVER_AUTHOR);
964 info(DRIVER_DESC);
965 return 0;
966
967 error: if (cardstate)
968 gigaset_freecs(cardstate);
969 cardstate = NULL;
970 if (driver)
971 gigaset_freedriver(driver);
972 driver = NULL;
973 return -1;
974 }
975
976
977 /**
978 * usb_gigaset_exit
979 * This function is called while unloading the kernel-module
980 */
981 static void __exit usb_gigaset_exit(void)
982 {
983 gigaset_blockdriver(driver); /* => probe will fail
984 * => no gigaset_start any more
985 */
986
987 gigaset_shutdown(cardstate);
988 /* from now on, no isdn callback should be possible */
989
990 /* deregister this driver with the USB subsystem */
991 usb_deregister(&gigaset_usb_driver);
992 /* this will call the disconnect-callback */
993 /* from now on, no disconnect/probe callback should be running */
994
995 gigaset_freecs(cardstate);
996 cardstate = NULL;
997 gigaset_freedriver(driver);
998 driver = NULL;
999 }
1000
1001
1002 module_init(usb_gigaset_init);
1003 module_exit(usb_gigaset_exit);
1004
1005 MODULE_AUTHOR(DRIVER_AUTHOR);
1006 MODULE_DESCRIPTION(DRIVER_DESC);
1007
1008 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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