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Merge branch 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / usb / class / cdc-acm.c
1 /*
2 * cdc-acm.c
3 *
4 * Copyright (c) 1999 Armin Fuerst <fuerst@in.tum.de>
5 * Copyright (c) 1999 Pavel Machek <pavel@ucw.cz>
6 * Copyright (c) 1999 Johannes Erdfelt <johannes@erdfelt.com>
7 * Copyright (c) 2000 Vojtech Pavlik <vojtech@suse.cz>
8 * Copyright (c) 2004 Oliver Neukum <oliver@neukum.name>
9 * Copyright (c) 2005 David Kubicek <dave@awk.cz>
10 * Copyright (c) 2011 Johan Hovold <jhovold@gmail.com>
11 *
12 * USB Abstract Control Model driver for USB modems and ISDN adapters
13 *
14 * Sponsored by SuSE
15 *
16 * This program is free software; you can redistribute it and/or modify
17 * it under the terms of the GNU General Public License as published by
18 * the Free Software Foundation; either version 2 of the License, or
19 * (at your option) any later version.
20 *
21 * This program is distributed in the hope that it will be useful,
22 * but WITHOUT ANY WARRANTY; without even the implied warranty of
23 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
24 * GNU General Public License for more details.
25 *
26 * You should have received a copy of the GNU General Public License
27 * along with this program; if not, write to the Free Software
28 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
29 */
30
31 #undef DEBUG
32 #undef VERBOSE_DEBUG
33
34 #include <linux/kernel.h>
35 #include <linux/errno.h>
36 #include <linux/init.h>
37 #include <linux/slab.h>
38 #include <linux/tty.h>
39 #include <linux/serial.h>
40 #include <linux/tty_driver.h>
41 #include <linux/tty_flip.h>
42 #include <linux/module.h>
43 #include <linux/mutex.h>
44 #include <linux/uaccess.h>
45 #include <linux/usb.h>
46 #include <linux/usb/cdc.h>
47 #include <asm/byteorder.h>
48 #include <asm/unaligned.h>
49 #include <linux/list.h>
50
51 #include "cdc-acm.h"
52
53
54 #define DRIVER_AUTHOR "Armin Fuerst, Pavel Machek, Johannes Erdfelt, Vojtech Pavlik, David Kubicek, Johan Hovold"
55 #define DRIVER_DESC "USB Abstract Control Model driver for USB modems and ISDN adapters"
56
57 static struct usb_driver acm_driver;
58 static struct tty_driver *acm_tty_driver;
59 static struct acm *acm_table[ACM_TTY_MINORS];
60
61 static DEFINE_MUTEX(acm_table_lock);
62
63 /*
64 * acm_table accessors
65 */
66
67 /*
68 * Look up an ACM structure by index. If found and not disconnected, increment
69 * its refcount and return it with its mutex held.
70 */
71 static struct acm *acm_get_by_index(unsigned index)
72 {
73 struct acm *acm;
74
75 mutex_lock(&acm_table_lock);
76 acm = acm_table[index];
77 if (acm) {
78 mutex_lock(&acm->mutex);
79 if (acm->disconnected) {
80 mutex_unlock(&acm->mutex);
81 acm = NULL;
82 } else {
83 tty_port_get(&acm->port);
84 mutex_unlock(&acm->mutex);
85 }
86 }
87 mutex_unlock(&acm_table_lock);
88 return acm;
89 }
90
91 /*
92 * Try to find an available minor number and if found, associate it with 'acm'.
93 */
94 static int acm_alloc_minor(struct acm *acm)
95 {
96 int minor;
97
98 mutex_lock(&acm_table_lock);
99 for (minor = 0; minor < ACM_TTY_MINORS; minor++) {
100 if (!acm_table[minor]) {
101 acm_table[minor] = acm;
102 break;
103 }
104 }
105 mutex_unlock(&acm_table_lock);
106
107 return minor;
108 }
109
110 /* Release the minor number associated with 'acm'. */
111 static void acm_release_minor(struct acm *acm)
112 {
113 mutex_lock(&acm_table_lock);
114 acm_table[acm->minor] = NULL;
115 mutex_unlock(&acm_table_lock);
116 }
117
118 /*
119 * Functions for ACM control messages.
120 */
121
122 static int acm_ctrl_msg(struct acm *acm, int request, int value,
123 void *buf, int len)
124 {
125 int retval = usb_control_msg(acm->dev, usb_sndctrlpipe(acm->dev, 0),
126 request, USB_RT_ACM, value,
127 acm->control->altsetting[0].desc.bInterfaceNumber,
128 buf, len, 5000);
129 dev_dbg(&acm->control->dev,
130 "%s - rq 0x%02x, val %#x, len %#x, result %d\n",
131 __func__, request, value, len, retval);
132 return retval < 0 ? retval : 0;
133 }
134
135 /* devices aren't required to support these requests.
136 * the cdc acm descriptor tells whether they do...
137 */
138 #define acm_set_control(acm, control) \
139 acm_ctrl_msg(acm, USB_CDC_REQ_SET_CONTROL_LINE_STATE, control, NULL, 0)
140 #define acm_set_line(acm, line) \
141 acm_ctrl_msg(acm, USB_CDC_REQ_SET_LINE_CODING, 0, line, sizeof *(line))
142 #define acm_send_break(acm, ms) \
143 acm_ctrl_msg(acm, USB_CDC_REQ_SEND_BREAK, ms, NULL, 0)
144
145 /*
146 * Write buffer management.
147 * All of these assume proper locks taken by the caller.
148 */
149
150 static int acm_wb_alloc(struct acm *acm)
151 {
152 int i, wbn;
153 struct acm_wb *wb;
154
155 wbn = 0;
156 i = 0;
157 for (;;) {
158 wb = &acm->wb[wbn];
159 if (!wb->use) {
160 wb->use = 1;
161 return wbn;
162 }
163 wbn = (wbn + 1) % ACM_NW;
164 if (++i >= ACM_NW)
165 return -1;
166 }
167 }
168
169 static int acm_wb_is_avail(struct acm *acm)
170 {
171 int i, n;
172 unsigned long flags;
173
174 n = ACM_NW;
175 spin_lock_irqsave(&acm->write_lock, flags);
176 for (i = 0; i < ACM_NW; i++)
177 n -= acm->wb[i].use;
178 spin_unlock_irqrestore(&acm->write_lock, flags);
179 return n;
180 }
181
182 /*
183 * Finish write. Caller must hold acm->write_lock
184 */
185 static void acm_write_done(struct acm *acm, struct acm_wb *wb)
186 {
187 wb->use = 0;
188 acm->transmitting--;
189 usb_autopm_put_interface_async(acm->control);
190 }
191
192 /*
193 * Poke write.
194 *
195 * the caller is responsible for locking
196 */
197
198 static int acm_start_wb(struct acm *acm, struct acm_wb *wb)
199 {
200 int rc;
201
202 acm->transmitting++;
203
204 wb->urb->transfer_buffer = wb->buf;
205 wb->urb->transfer_dma = wb->dmah;
206 wb->urb->transfer_buffer_length = wb->len;
207 wb->urb->dev = acm->dev;
208
209 rc = usb_submit_urb(wb->urb, GFP_ATOMIC);
210 if (rc < 0) {
211 dev_err(&acm->data->dev,
212 "%s - usb_submit_urb(write bulk) failed: %d\n",
213 __func__, rc);
214 acm_write_done(acm, wb);
215 }
216 return rc;
217 }
218
219 static int acm_write_start(struct acm *acm, int wbn)
220 {
221 unsigned long flags;
222 struct acm_wb *wb = &acm->wb[wbn];
223 int rc;
224
225 spin_lock_irqsave(&acm->write_lock, flags);
226 if (!acm->dev) {
227 wb->use = 0;
228 spin_unlock_irqrestore(&acm->write_lock, flags);
229 return -ENODEV;
230 }
231
232 dev_vdbg(&acm->data->dev, "%s - susp_count %d\n", __func__,
233 acm->susp_count);
234 usb_autopm_get_interface_async(acm->control);
235 if (acm->susp_count) {
236 if (!acm->delayed_wb)
237 acm->delayed_wb = wb;
238 else
239 usb_autopm_put_interface_async(acm->control);
240 spin_unlock_irqrestore(&acm->write_lock, flags);
241 return 0; /* A white lie */
242 }
243 usb_mark_last_busy(acm->dev);
244
245 rc = acm_start_wb(acm, wb);
246 spin_unlock_irqrestore(&acm->write_lock, flags);
247
248 return rc;
249
250 }
251 /*
252 * attributes exported through sysfs
253 */
254 static ssize_t show_caps
255 (struct device *dev, struct device_attribute *attr, char *buf)
256 {
257 struct usb_interface *intf = to_usb_interface(dev);
258 struct acm *acm = usb_get_intfdata(intf);
259
260 return sprintf(buf, "%d", acm->ctrl_caps);
261 }
262 static DEVICE_ATTR(bmCapabilities, S_IRUGO, show_caps, NULL);
263
264 static ssize_t show_country_codes
265 (struct device *dev, struct device_attribute *attr, char *buf)
266 {
267 struct usb_interface *intf = to_usb_interface(dev);
268 struct acm *acm = usb_get_intfdata(intf);
269
270 memcpy(buf, acm->country_codes, acm->country_code_size);
271 return acm->country_code_size;
272 }
273
274 static DEVICE_ATTR(wCountryCodes, S_IRUGO, show_country_codes, NULL);
275
276 static ssize_t show_country_rel_date
277 (struct device *dev, struct device_attribute *attr, char *buf)
278 {
279 struct usb_interface *intf = to_usb_interface(dev);
280 struct acm *acm = usb_get_intfdata(intf);
281
282 return sprintf(buf, "%d", acm->country_rel_date);
283 }
284
285 static DEVICE_ATTR(iCountryCodeRelDate, S_IRUGO, show_country_rel_date, NULL);
286 /*
287 * Interrupt handlers for various ACM device responses
288 */
289
290 /* control interface reports status changes with "interrupt" transfers */
291 static void acm_ctrl_irq(struct urb *urb)
292 {
293 struct acm *acm = urb->context;
294 struct usb_cdc_notification *dr = urb->transfer_buffer;
295 unsigned char *data;
296 int newctrl;
297 int retval;
298 int status = urb->status;
299
300 switch (status) {
301 case 0:
302 /* success */
303 break;
304 case -ECONNRESET:
305 case -ENOENT:
306 case -ESHUTDOWN:
307 /* this urb is terminated, clean up */
308 dev_dbg(&acm->control->dev,
309 "%s - urb shutting down with status: %d\n",
310 __func__, status);
311 return;
312 default:
313 dev_dbg(&acm->control->dev,
314 "%s - nonzero urb status received: %d\n",
315 __func__, status);
316 goto exit;
317 }
318
319 usb_mark_last_busy(acm->dev);
320
321 data = (unsigned char *)(dr + 1);
322 switch (dr->bNotificationType) {
323 case USB_CDC_NOTIFY_NETWORK_CONNECTION:
324 dev_dbg(&acm->control->dev, "%s - network connection: %d\n",
325 __func__, dr->wValue);
326 break;
327
328 case USB_CDC_NOTIFY_SERIAL_STATE:
329 newctrl = get_unaligned_le16(data);
330
331 if (!acm->clocal && (acm->ctrlin & ~newctrl & ACM_CTRL_DCD)) {
332 dev_dbg(&acm->control->dev, "%s - calling hangup\n",
333 __func__);
334 tty_port_tty_hangup(&acm->port, false);
335 }
336
337 acm->ctrlin = newctrl;
338
339 dev_dbg(&acm->control->dev,
340 "%s - input control lines: dcd%c dsr%c break%c "
341 "ring%c framing%c parity%c overrun%c\n",
342 __func__,
343 acm->ctrlin & ACM_CTRL_DCD ? '+' : '-',
344 acm->ctrlin & ACM_CTRL_DSR ? '+' : '-',
345 acm->ctrlin & ACM_CTRL_BRK ? '+' : '-',
346 acm->ctrlin & ACM_CTRL_RI ? '+' : '-',
347 acm->ctrlin & ACM_CTRL_FRAMING ? '+' : '-',
348 acm->ctrlin & ACM_CTRL_PARITY ? '+' : '-',
349 acm->ctrlin & ACM_CTRL_OVERRUN ? '+' : '-');
350 break;
351
352 default:
353 dev_dbg(&acm->control->dev,
354 "%s - unknown notification %d received: index %d "
355 "len %d data0 %d data1 %d\n",
356 __func__,
357 dr->bNotificationType, dr->wIndex,
358 dr->wLength, data[0], data[1]);
359 break;
360 }
361 exit:
362 retval = usb_submit_urb(urb, GFP_ATOMIC);
363 if (retval)
364 dev_err(&acm->control->dev, "%s - usb_submit_urb failed: %d\n",
365 __func__, retval);
366 }
367
368 static int acm_submit_read_urb(struct acm *acm, int index, gfp_t mem_flags)
369 {
370 int res;
371
372 if (!test_and_clear_bit(index, &acm->read_urbs_free))
373 return 0;
374
375 dev_vdbg(&acm->data->dev, "%s - urb %d\n", __func__, index);
376
377 res = usb_submit_urb(acm->read_urbs[index], mem_flags);
378 if (res) {
379 if (res != -EPERM) {
380 dev_err(&acm->data->dev,
381 "%s - usb_submit_urb failed: %d\n",
382 __func__, res);
383 }
384 set_bit(index, &acm->read_urbs_free);
385 return res;
386 }
387
388 return 0;
389 }
390
391 static int acm_submit_read_urbs(struct acm *acm, gfp_t mem_flags)
392 {
393 int res;
394 int i;
395
396 for (i = 0; i < acm->rx_buflimit; ++i) {
397 res = acm_submit_read_urb(acm, i, mem_flags);
398 if (res)
399 return res;
400 }
401
402 return 0;
403 }
404
405 static void acm_process_read_urb(struct acm *acm, struct urb *urb)
406 {
407 if (!urb->actual_length)
408 return;
409
410 tty_insert_flip_string(&acm->port, urb->transfer_buffer,
411 urb->actual_length);
412 tty_flip_buffer_push(&acm->port);
413 }
414
415 static void acm_read_bulk_callback(struct urb *urb)
416 {
417 struct acm_rb *rb = urb->context;
418 struct acm *acm = rb->instance;
419 unsigned long flags;
420
421 dev_vdbg(&acm->data->dev, "%s - urb %d, len %d\n", __func__,
422 rb->index, urb->actual_length);
423 set_bit(rb->index, &acm->read_urbs_free);
424
425 if (!acm->dev) {
426 dev_dbg(&acm->data->dev, "%s - disconnected\n", __func__);
427 return;
428 }
429 usb_mark_last_busy(acm->dev);
430
431 if (urb->status) {
432 dev_dbg(&acm->data->dev, "%s - non-zero urb status: %d\n",
433 __func__, urb->status);
434 return;
435 }
436 acm_process_read_urb(acm, urb);
437
438 /* throttle device if requested by tty */
439 spin_lock_irqsave(&acm->read_lock, flags);
440 acm->throttled = acm->throttle_req;
441 if (!acm->throttled && !acm->susp_count) {
442 spin_unlock_irqrestore(&acm->read_lock, flags);
443 acm_submit_read_urb(acm, rb->index, GFP_ATOMIC);
444 } else {
445 spin_unlock_irqrestore(&acm->read_lock, flags);
446 }
447 }
448
449 /* data interface wrote those outgoing bytes */
450 static void acm_write_bulk(struct urb *urb)
451 {
452 struct acm_wb *wb = urb->context;
453 struct acm *acm = wb->instance;
454 unsigned long flags;
455
456 if (urb->status || (urb->actual_length != urb->transfer_buffer_length))
457 dev_vdbg(&acm->data->dev, "%s - len %d/%d, status %d\n",
458 __func__,
459 urb->actual_length,
460 urb->transfer_buffer_length,
461 urb->status);
462
463 spin_lock_irqsave(&acm->write_lock, flags);
464 acm_write_done(acm, wb);
465 spin_unlock_irqrestore(&acm->write_lock, flags);
466 schedule_work(&acm->work);
467 }
468
469 static void acm_softint(struct work_struct *work)
470 {
471 struct acm *acm = container_of(work, struct acm, work);
472
473 dev_vdbg(&acm->data->dev, "%s\n", __func__);
474
475 tty_port_tty_wakeup(&acm->port);
476 }
477
478 /*
479 * TTY handlers
480 */
481
482 static int acm_tty_install(struct tty_driver *driver, struct tty_struct *tty)
483 {
484 struct acm *acm;
485 int retval;
486
487 dev_dbg(tty->dev, "%s\n", __func__);
488
489 acm = acm_get_by_index(tty->index);
490 if (!acm)
491 return -ENODEV;
492
493 retval = tty_standard_install(driver, tty);
494 if (retval)
495 goto error_init_termios;
496
497 tty->driver_data = acm;
498
499 return 0;
500
501 error_init_termios:
502 tty_port_put(&acm->port);
503 return retval;
504 }
505
506 static int acm_tty_open(struct tty_struct *tty, struct file *filp)
507 {
508 struct acm *acm = tty->driver_data;
509
510 dev_dbg(tty->dev, "%s\n", __func__);
511
512 return tty_port_open(&acm->port, tty, filp);
513 }
514
515 static int acm_port_activate(struct tty_port *port, struct tty_struct *tty)
516 {
517 struct acm *acm = container_of(port, struct acm, port);
518 int retval = -ENODEV;
519
520 dev_dbg(&acm->control->dev, "%s\n", __func__);
521
522 mutex_lock(&acm->mutex);
523 if (acm->disconnected)
524 goto disconnected;
525
526 retval = usb_autopm_get_interface(acm->control);
527 if (retval)
528 goto error_get_interface;
529
530 /*
531 * FIXME: Why do we need this? Allocating 64K of physically contiguous
532 * memory is really nasty...
533 */
534 set_bit(TTY_NO_WRITE_SPLIT, &tty->flags);
535 acm->control->needs_remote_wakeup = 1;
536
537 acm->ctrlurb->dev = acm->dev;
538 if (usb_submit_urb(acm->ctrlurb, GFP_KERNEL)) {
539 dev_err(&acm->control->dev,
540 "%s - usb_submit_urb(ctrl irq) failed\n", __func__);
541 goto error_submit_urb;
542 }
543
544 acm->ctrlout = ACM_CTRL_DTR | ACM_CTRL_RTS;
545 if (acm_set_control(acm, acm->ctrlout) < 0 &&
546 (acm->ctrl_caps & USB_CDC_CAP_LINE))
547 goto error_set_control;
548
549 usb_autopm_put_interface(acm->control);
550
551 /*
552 * Unthrottle device in case the TTY was closed while throttled.
553 */
554 spin_lock_irq(&acm->read_lock);
555 acm->throttled = 0;
556 acm->throttle_req = 0;
557 spin_unlock_irq(&acm->read_lock);
558
559 if (acm_submit_read_urbs(acm, GFP_KERNEL))
560 goto error_submit_read_urbs;
561
562 mutex_unlock(&acm->mutex);
563
564 return 0;
565
566 error_submit_read_urbs:
567 acm->ctrlout = 0;
568 acm_set_control(acm, acm->ctrlout);
569 error_set_control:
570 usb_kill_urb(acm->ctrlurb);
571 error_submit_urb:
572 usb_autopm_put_interface(acm->control);
573 error_get_interface:
574 disconnected:
575 mutex_unlock(&acm->mutex);
576 return retval;
577 }
578
579 static void acm_port_destruct(struct tty_port *port)
580 {
581 struct acm *acm = container_of(port, struct acm, port);
582
583 dev_dbg(&acm->control->dev, "%s\n", __func__);
584
585 acm_release_minor(acm);
586 usb_put_intf(acm->control);
587 kfree(acm->country_codes);
588 kfree(acm);
589 }
590
591 static void acm_port_shutdown(struct tty_port *port)
592 {
593 struct acm *acm = container_of(port, struct acm, port);
594 int i;
595
596 dev_dbg(&acm->control->dev, "%s\n", __func__);
597
598 mutex_lock(&acm->mutex);
599 if (!acm->disconnected) {
600 usb_autopm_get_interface(acm->control);
601 acm_set_control(acm, acm->ctrlout = 0);
602 usb_kill_urb(acm->ctrlurb);
603 for (i = 0; i < ACM_NW; i++)
604 usb_kill_urb(acm->wb[i].urb);
605 for (i = 0; i < acm->rx_buflimit; i++)
606 usb_kill_urb(acm->read_urbs[i]);
607 acm->control->needs_remote_wakeup = 0;
608 usb_autopm_put_interface(acm->control);
609 }
610 mutex_unlock(&acm->mutex);
611 }
612
613 static void acm_tty_cleanup(struct tty_struct *tty)
614 {
615 struct acm *acm = tty->driver_data;
616 dev_dbg(&acm->control->dev, "%s\n", __func__);
617 tty_port_put(&acm->port);
618 }
619
620 static void acm_tty_hangup(struct tty_struct *tty)
621 {
622 struct acm *acm = tty->driver_data;
623 dev_dbg(&acm->control->dev, "%s\n", __func__);
624 tty_port_hangup(&acm->port);
625 }
626
627 static void acm_tty_close(struct tty_struct *tty, struct file *filp)
628 {
629 struct acm *acm = tty->driver_data;
630 dev_dbg(&acm->control->dev, "%s\n", __func__);
631 tty_port_close(&acm->port, tty, filp);
632 }
633
634 static int acm_tty_write(struct tty_struct *tty,
635 const unsigned char *buf, int count)
636 {
637 struct acm *acm = tty->driver_data;
638 int stat;
639 unsigned long flags;
640 int wbn;
641 struct acm_wb *wb;
642
643 if (!count)
644 return 0;
645
646 dev_vdbg(&acm->data->dev, "%s - count %d\n", __func__, count);
647
648 spin_lock_irqsave(&acm->write_lock, flags);
649 wbn = acm_wb_alloc(acm);
650 if (wbn < 0) {
651 spin_unlock_irqrestore(&acm->write_lock, flags);
652 return 0;
653 }
654 wb = &acm->wb[wbn];
655
656 count = (count > acm->writesize) ? acm->writesize : count;
657 dev_vdbg(&acm->data->dev, "%s - write %d\n", __func__, count);
658 memcpy(wb->buf, buf, count);
659 wb->len = count;
660 spin_unlock_irqrestore(&acm->write_lock, flags);
661
662 stat = acm_write_start(acm, wbn);
663 if (stat < 0)
664 return stat;
665 return count;
666 }
667
668 static int acm_tty_write_room(struct tty_struct *tty)
669 {
670 struct acm *acm = tty->driver_data;
671 /*
672 * Do not let the line discipline to know that we have a reserve,
673 * or it might get too enthusiastic.
674 */
675 return acm_wb_is_avail(acm) ? acm->writesize : 0;
676 }
677
678 static int acm_tty_chars_in_buffer(struct tty_struct *tty)
679 {
680 struct acm *acm = tty->driver_data;
681 /*
682 * if the device was unplugged then any remaining characters fell out
683 * of the connector ;)
684 */
685 if (acm->disconnected)
686 return 0;
687 /*
688 * This is inaccurate (overcounts), but it works.
689 */
690 return (ACM_NW - acm_wb_is_avail(acm)) * acm->writesize;
691 }
692
693 static void acm_tty_throttle(struct tty_struct *tty)
694 {
695 struct acm *acm = tty->driver_data;
696
697 spin_lock_irq(&acm->read_lock);
698 acm->throttle_req = 1;
699 spin_unlock_irq(&acm->read_lock);
700 }
701
702 static void acm_tty_unthrottle(struct tty_struct *tty)
703 {
704 struct acm *acm = tty->driver_data;
705 unsigned int was_throttled;
706
707 spin_lock_irq(&acm->read_lock);
708 was_throttled = acm->throttled;
709 acm->throttled = 0;
710 acm->throttle_req = 0;
711 spin_unlock_irq(&acm->read_lock);
712
713 if (was_throttled)
714 acm_submit_read_urbs(acm, GFP_KERNEL);
715 }
716
717 static int acm_tty_break_ctl(struct tty_struct *tty, int state)
718 {
719 struct acm *acm = tty->driver_data;
720 int retval;
721
722 retval = acm_send_break(acm, state ? 0xffff : 0);
723 if (retval < 0)
724 dev_dbg(&acm->control->dev, "%s - send break failed\n",
725 __func__);
726 return retval;
727 }
728
729 static int acm_tty_tiocmget(struct tty_struct *tty)
730 {
731 struct acm *acm = tty->driver_data;
732
733 return (acm->ctrlout & ACM_CTRL_DTR ? TIOCM_DTR : 0) |
734 (acm->ctrlout & ACM_CTRL_RTS ? TIOCM_RTS : 0) |
735 (acm->ctrlin & ACM_CTRL_DSR ? TIOCM_DSR : 0) |
736 (acm->ctrlin & ACM_CTRL_RI ? TIOCM_RI : 0) |
737 (acm->ctrlin & ACM_CTRL_DCD ? TIOCM_CD : 0) |
738 TIOCM_CTS;
739 }
740
741 static int acm_tty_tiocmset(struct tty_struct *tty,
742 unsigned int set, unsigned int clear)
743 {
744 struct acm *acm = tty->driver_data;
745 unsigned int newctrl;
746
747 newctrl = acm->ctrlout;
748 set = (set & TIOCM_DTR ? ACM_CTRL_DTR : 0) |
749 (set & TIOCM_RTS ? ACM_CTRL_RTS : 0);
750 clear = (clear & TIOCM_DTR ? ACM_CTRL_DTR : 0) |
751 (clear & TIOCM_RTS ? ACM_CTRL_RTS : 0);
752
753 newctrl = (newctrl & ~clear) | set;
754
755 if (acm->ctrlout == newctrl)
756 return 0;
757 return acm_set_control(acm, acm->ctrlout = newctrl);
758 }
759
760 static int get_serial_info(struct acm *acm, struct serial_struct __user *info)
761 {
762 struct serial_struct tmp;
763
764 if (!info)
765 return -EINVAL;
766
767 memset(&tmp, 0, sizeof(tmp));
768 tmp.flags = ASYNC_LOW_LATENCY;
769 tmp.xmit_fifo_size = acm->writesize;
770 tmp.baud_base = le32_to_cpu(acm->line.dwDTERate);
771 tmp.close_delay = acm->port.close_delay / 10;
772 tmp.closing_wait = acm->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ?
773 ASYNC_CLOSING_WAIT_NONE :
774 acm->port.closing_wait / 10;
775
776 if (copy_to_user(info, &tmp, sizeof(tmp)))
777 return -EFAULT;
778 else
779 return 0;
780 }
781
782 static int set_serial_info(struct acm *acm,
783 struct serial_struct __user *newinfo)
784 {
785 struct serial_struct new_serial;
786 unsigned int closing_wait, close_delay;
787 int retval = 0;
788
789 if (copy_from_user(&new_serial, newinfo, sizeof(new_serial)))
790 return -EFAULT;
791
792 close_delay = new_serial.close_delay * 10;
793 closing_wait = new_serial.closing_wait == ASYNC_CLOSING_WAIT_NONE ?
794 ASYNC_CLOSING_WAIT_NONE : new_serial.closing_wait * 10;
795
796 mutex_lock(&acm->port.mutex);
797
798 if (!capable(CAP_SYS_ADMIN)) {
799 if ((close_delay != acm->port.close_delay) ||
800 (closing_wait != acm->port.closing_wait))
801 retval = -EPERM;
802 else
803 retval = -EOPNOTSUPP;
804 } else {
805 acm->port.close_delay = close_delay;
806 acm->port.closing_wait = closing_wait;
807 }
808
809 mutex_unlock(&acm->port.mutex);
810 return retval;
811 }
812
813 static int acm_tty_ioctl(struct tty_struct *tty,
814 unsigned int cmd, unsigned long arg)
815 {
816 struct acm *acm = tty->driver_data;
817 int rv = -ENOIOCTLCMD;
818
819 switch (cmd) {
820 case TIOCGSERIAL: /* gets serial port data */
821 rv = get_serial_info(acm, (struct serial_struct __user *) arg);
822 break;
823 case TIOCSSERIAL:
824 rv = set_serial_info(acm, (struct serial_struct __user *) arg);
825 break;
826 }
827
828 return rv;
829 }
830
831 static void acm_tty_set_termios(struct tty_struct *tty,
832 struct ktermios *termios_old)
833 {
834 struct acm *acm = tty->driver_data;
835 struct ktermios *termios = &tty->termios;
836 struct usb_cdc_line_coding newline;
837 int newctrl = acm->ctrlout;
838
839 newline.dwDTERate = cpu_to_le32(tty_get_baud_rate(tty));
840 newline.bCharFormat = termios->c_cflag & CSTOPB ? 2 : 0;
841 newline.bParityType = termios->c_cflag & PARENB ?
842 (termios->c_cflag & PARODD ? 1 : 2) +
843 (termios->c_cflag & CMSPAR ? 2 : 0) : 0;
844 switch (termios->c_cflag & CSIZE) {
845 case CS5:
846 newline.bDataBits = 5;
847 break;
848 case CS6:
849 newline.bDataBits = 6;
850 break;
851 case CS7:
852 newline.bDataBits = 7;
853 break;
854 case CS8:
855 default:
856 newline.bDataBits = 8;
857 break;
858 }
859 /* FIXME: Needs to clear unsupported bits in the termios */
860 acm->clocal = ((termios->c_cflag & CLOCAL) != 0);
861
862 if (!newline.dwDTERate) {
863 newline.dwDTERate = acm->line.dwDTERate;
864 newctrl &= ~ACM_CTRL_DTR;
865 } else
866 newctrl |= ACM_CTRL_DTR;
867
868 if (newctrl != acm->ctrlout)
869 acm_set_control(acm, acm->ctrlout = newctrl);
870
871 if (memcmp(&acm->line, &newline, sizeof newline)) {
872 memcpy(&acm->line, &newline, sizeof newline);
873 dev_dbg(&acm->control->dev, "%s - set line: %d %d %d %d\n",
874 __func__,
875 le32_to_cpu(newline.dwDTERate),
876 newline.bCharFormat, newline.bParityType,
877 newline.bDataBits);
878 acm_set_line(acm, &acm->line);
879 }
880 }
881
882 static const struct tty_port_operations acm_port_ops = {
883 .shutdown = acm_port_shutdown,
884 .activate = acm_port_activate,
885 .destruct = acm_port_destruct,
886 };
887
888 /*
889 * USB probe and disconnect routines.
890 */
891
892 /* Little helpers: write/read buffers free */
893 static void acm_write_buffers_free(struct acm *acm)
894 {
895 int i;
896 struct acm_wb *wb;
897 struct usb_device *usb_dev = interface_to_usbdev(acm->control);
898
899 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++)
900 usb_free_coherent(usb_dev, acm->writesize, wb->buf, wb->dmah);
901 }
902
903 static void acm_read_buffers_free(struct acm *acm)
904 {
905 struct usb_device *usb_dev = interface_to_usbdev(acm->control);
906 int i;
907
908 for (i = 0; i < acm->rx_buflimit; i++)
909 usb_free_coherent(usb_dev, acm->readsize,
910 acm->read_buffers[i].base, acm->read_buffers[i].dma);
911 }
912
913 /* Little helper: write buffers allocate */
914 static int acm_write_buffers_alloc(struct acm *acm)
915 {
916 int i;
917 struct acm_wb *wb;
918
919 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) {
920 wb->buf = usb_alloc_coherent(acm->dev, acm->writesize, GFP_KERNEL,
921 &wb->dmah);
922 if (!wb->buf) {
923 while (i != 0) {
924 --i;
925 --wb;
926 usb_free_coherent(acm->dev, acm->writesize,
927 wb->buf, wb->dmah);
928 }
929 return -ENOMEM;
930 }
931 }
932 return 0;
933 }
934
935 static int acm_probe(struct usb_interface *intf,
936 const struct usb_device_id *id)
937 {
938 struct usb_cdc_union_desc *union_header = NULL;
939 struct usb_cdc_country_functional_desc *cfd = NULL;
940 unsigned char *buffer = intf->altsetting->extra;
941 int buflen = intf->altsetting->extralen;
942 struct usb_interface *control_interface;
943 struct usb_interface *data_interface;
944 struct usb_endpoint_descriptor *epctrl = NULL;
945 struct usb_endpoint_descriptor *epread = NULL;
946 struct usb_endpoint_descriptor *epwrite = NULL;
947 struct usb_device *usb_dev = interface_to_usbdev(intf);
948 struct acm *acm;
949 int minor;
950 int ctrlsize, readsize;
951 u8 *buf;
952 u8 ac_management_function = 0;
953 u8 call_management_function = 0;
954 int call_interface_num = -1;
955 int data_interface_num = -1;
956 unsigned long quirks;
957 int num_rx_buf;
958 int i;
959 int combined_interfaces = 0;
960 struct device *tty_dev;
961 int rv = -ENOMEM;
962
963 /* normal quirks */
964 quirks = (unsigned long)id->driver_info;
965 num_rx_buf = (quirks == SINGLE_RX_URB) ? 1 : ACM_NR;
966
967 /* handle quirks deadly to normal probing*/
968 if (quirks == NO_UNION_NORMAL) {
969 data_interface = usb_ifnum_to_if(usb_dev, 1);
970 control_interface = usb_ifnum_to_if(usb_dev, 0);
971 goto skip_normal_probe;
972 }
973
974 /* normal probing*/
975 if (!buffer) {
976 dev_err(&intf->dev, "Weird descriptor references\n");
977 return -EINVAL;
978 }
979
980 if (!buflen) {
981 if (intf->cur_altsetting->endpoint &&
982 intf->cur_altsetting->endpoint->extralen &&
983 intf->cur_altsetting->endpoint->extra) {
984 dev_dbg(&intf->dev,
985 "Seeking extra descriptors on endpoint\n");
986 buflen = intf->cur_altsetting->endpoint->extralen;
987 buffer = intf->cur_altsetting->endpoint->extra;
988 } else {
989 dev_err(&intf->dev,
990 "Zero length descriptor references\n");
991 return -EINVAL;
992 }
993 }
994
995 while (buflen > 0) {
996 if (buffer[1] != USB_DT_CS_INTERFACE) {
997 dev_err(&intf->dev, "skipping garbage\n");
998 goto next_desc;
999 }
1000
1001 switch (buffer[2]) {
1002 case USB_CDC_UNION_TYPE: /* we've found it */
1003 if (union_header) {
1004 dev_err(&intf->dev, "More than one "
1005 "union descriptor, skipping ...\n");
1006 goto next_desc;
1007 }
1008 union_header = (struct usb_cdc_union_desc *)buffer;
1009 break;
1010 case USB_CDC_COUNTRY_TYPE: /* export through sysfs*/
1011 cfd = (struct usb_cdc_country_functional_desc *)buffer;
1012 break;
1013 case USB_CDC_HEADER_TYPE: /* maybe check version */
1014 break; /* for now we ignore it */
1015 case USB_CDC_ACM_TYPE:
1016 ac_management_function = buffer[3];
1017 break;
1018 case USB_CDC_CALL_MANAGEMENT_TYPE:
1019 call_management_function = buffer[3];
1020 call_interface_num = buffer[4];
1021 if ((quirks & NOT_A_MODEM) == 0 && (call_management_function & 3) != 3)
1022 dev_err(&intf->dev, "This device cannot do calls on its own. It is not a modem.\n");
1023 break;
1024 default:
1025 /* there are LOTS more CDC descriptors that
1026 * could legitimately be found here.
1027 */
1028 dev_dbg(&intf->dev, "Ignoring descriptor: "
1029 "type %02x, length %d\n",
1030 buffer[2], buffer[0]);
1031 break;
1032 }
1033 next_desc:
1034 buflen -= buffer[0];
1035 buffer += buffer[0];
1036 }
1037
1038 if (!union_header) {
1039 if (call_interface_num > 0) {
1040 dev_dbg(&intf->dev, "No union descriptor, using call management descriptor\n");
1041 /* quirks for Droids MuIn LCD */
1042 if (quirks & NO_DATA_INTERFACE)
1043 data_interface = usb_ifnum_to_if(usb_dev, 0);
1044 else
1045 data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = call_interface_num));
1046 control_interface = intf;
1047 } else {
1048 if (intf->cur_altsetting->desc.bNumEndpoints != 3) {
1049 dev_dbg(&intf->dev,"No union descriptor, giving up\n");
1050 return -ENODEV;
1051 } else {
1052 dev_warn(&intf->dev,"No union descriptor, testing for castrated device\n");
1053 combined_interfaces = 1;
1054 control_interface = data_interface = intf;
1055 goto look_for_collapsed_interface;
1056 }
1057 }
1058 } else {
1059 control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0);
1060 data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = union_header->bSlaveInterface0));
1061 if (!control_interface || !data_interface) {
1062 dev_dbg(&intf->dev, "no interfaces\n");
1063 return -ENODEV;
1064 }
1065 }
1066
1067 if (data_interface_num != call_interface_num)
1068 dev_dbg(&intf->dev, "Separate call control interface. That is not fully supported.\n");
1069
1070 if (control_interface == data_interface) {
1071 /* some broken devices designed for windows work this way */
1072 dev_warn(&intf->dev,"Control and data interfaces are not separated!\n");
1073 combined_interfaces = 1;
1074 /* a popular other OS doesn't use it */
1075 quirks |= NO_CAP_LINE;
1076 if (data_interface->cur_altsetting->desc.bNumEndpoints != 3) {
1077 dev_err(&intf->dev, "This needs exactly 3 endpoints\n");
1078 return -EINVAL;
1079 }
1080 look_for_collapsed_interface:
1081 for (i = 0; i < 3; i++) {
1082 struct usb_endpoint_descriptor *ep;
1083 ep = &data_interface->cur_altsetting->endpoint[i].desc;
1084
1085 if (usb_endpoint_is_int_in(ep))
1086 epctrl = ep;
1087 else if (usb_endpoint_is_bulk_out(ep))
1088 epwrite = ep;
1089 else if (usb_endpoint_is_bulk_in(ep))
1090 epread = ep;
1091 else
1092 return -EINVAL;
1093 }
1094 if (!epctrl || !epread || !epwrite)
1095 return -ENODEV;
1096 else
1097 goto made_compressed_probe;
1098 }
1099
1100 skip_normal_probe:
1101
1102 /*workaround for switched interfaces */
1103 if (data_interface->cur_altsetting->desc.bInterfaceClass
1104 != CDC_DATA_INTERFACE_TYPE) {
1105 if (control_interface->cur_altsetting->desc.bInterfaceClass
1106 == CDC_DATA_INTERFACE_TYPE) {
1107 struct usb_interface *t;
1108 dev_dbg(&intf->dev,
1109 "Your device has switched interfaces.\n");
1110 t = control_interface;
1111 control_interface = data_interface;
1112 data_interface = t;
1113 } else {
1114 return -EINVAL;
1115 }
1116 }
1117
1118 /* Accept probe requests only for the control interface */
1119 if (!combined_interfaces && intf != control_interface)
1120 return -ENODEV;
1121
1122 if (!combined_interfaces && usb_interface_claimed(data_interface)) {
1123 /* valid in this context */
1124 dev_dbg(&intf->dev, "The data interface isn't available\n");
1125 return -EBUSY;
1126 }
1127
1128
1129 if (data_interface->cur_altsetting->desc.bNumEndpoints < 2 ||
1130 control_interface->cur_altsetting->desc.bNumEndpoints == 0)
1131 return -EINVAL;
1132
1133 epctrl = &control_interface->cur_altsetting->endpoint[0].desc;
1134 epread = &data_interface->cur_altsetting->endpoint[0].desc;
1135 epwrite = &data_interface->cur_altsetting->endpoint[1].desc;
1136
1137
1138 /* workaround for switched endpoints */
1139 if (!usb_endpoint_dir_in(epread)) {
1140 /* descriptors are swapped */
1141 struct usb_endpoint_descriptor *t;
1142 dev_dbg(&intf->dev,
1143 "The data interface has switched endpoints\n");
1144 t = epread;
1145 epread = epwrite;
1146 epwrite = t;
1147 }
1148 made_compressed_probe:
1149 dev_dbg(&intf->dev, "interfaces are valid\n");
1150
1151 acm = kzalloc(sizeof(struct acm), GFP_KERNEL);
1152 if (acm == NULL) {
1153 dev_err(&intf->dev, "out of memory (acm kzalloc)\n");
1154 goto alloc_fail;
1155 }
1156
1157 minor = acm_alloc_minor(acm);
1158 if (minor == ACM_TTY_MINORS) {
1159 dev_err(&intf->dev, "no more free acm devices\n");
1160 kfree(acm);
1161 return -ENODEV;
1162 }
1163
1164 ctrlsize = usb_endpoint_maxp(epctrl);
1165 readsize = usb_endpoint_maxp(epread) *
1166 (quirks == SINGLE_RX_URB ? 1 : 2);
1167 acm->combined_interfaces = combined_interfaces;
1168 acm->writesize = usb_endpoint_maxp(epwrite) * 20;
1169 acm->control = control_interface;
1170 acm->data = data_interface;
1171 acm->minor = minor;
1172 acm->dev = usb_dev;
1173 acm->ctrl_caps = ac_management_function;
1174 if (quirks & NO_CAP_LINE)
1175 acm->ctrl_caps &= ~USB_CDC_CAP_LINE;
1176 acm->ctrlsize = ctrlsize;
1177 acm->readsize = readsize;
1178 acm->rx_buflimit = num_rx_buf;
1179 INIT_WORK(&acm->work, acm_softint);
1180 spin_lock_init(&acm->write_lock);
1181 spin_lock_init(&acm->read_lock);
1182 mutex_init(&acm->mutex);
1183 acm->rx_endpoint = usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress);
1184 acm->is_int_ep = usb_endpoint_xfer_int(epread);
1185 if (acm->is_int_ep)
1186 acm->bInterval = epread->bInterval;
1187 tty_port_init(&acm->port);
1188 acm->port.ops = &acm_port_ops;
1189
1190 buf = usb_alloc_coherent(usb_dev, ctrlsize, GFP_KERNEL, &acm->ctrl_dma);
1191 if (!buf) {
1192 dev_err(&intf->dev, "out of memory (ctrl buffer alloc)\n");
1193 goto alloc_fail2;
1194 }
1195 acm->ctrl_buffer = buf;
1196
1197 if (acm_write_buffers_alloc(acm) < 0) {
1198 dev_err(&intf->dev, "out of memory (write buffer alloc)\n");
1199 goto alloc_fail4;
1200 }
1201
1202 acm->ctrlurb = usb_alloc_urb(0, GFP_KERNEL);
1203 if (!acm->ctrlurb) {
1204 dev_err(&intf->dev, "out of memory (ctrlurb kmalloc)\n");
1205 goto alloc_fail5;
1206 }
1207 for (i = 0; i < num_rx_buf; i++) {
1208 struct acm_rb *rb = &(acm->read_buffers[i]);
1209 struct urb *urb;
1210
1211 rb->base = usb_alloc_coherent(acm->dev, readsize, GFP_KERNEL,
1212 &rb->dma);
1213 if (!rb->base) {
1214 dev_err(&intf->dev, "out of memory "
1215 "(read bufs usb_alloc_coherent)\n");
1216 goto alloc_fail6;
1217 }
1218 rb->index = i;
1219 rb->instance = acm;
1220
1221 urb = usb_alloc_urb(0, GFP_KERNEL);
1222 if (!urb) {
1223 dev_err(&intf->dev,
1224 "out of memory (read urbs usb_alloc_urb)\n");
1225 goto alloc_fail6;
1226 }
1227 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1228 urb->transfer_dma = rb->dma;
1229 if (acm->is_int_ep) {
1230 usb_fill_int_urb(urb, acm->dev,
1231 acm->rx_endpoint,
1232 rb->base,
1233 acm->readsize,
1234 acm_read_bulk_callback, rb,
1235 acm->bInterval);
1236 } else {
1237 usb_fill_bulk_urb(urb, acm->dev,
1238 acm->rx_endpoint,
1239 rb->base,
1240 acm->readsize,
1241 acm_read_bulk_callback, rb);
1242 }
1243
1244 acm->read_urbs[i] = urb;
1245 __set_bit(i, &acm->read_urbs_free);
1246 }
1247 for (i = 0; i < ACM_NW; i++) {
1248 struct acm_wb *snd = &(acm->wb[i]);
1249
1250 snd->urb = usb_alloc_urb(0, GFP_KERNEL);
1251 if (snd->urb == NULL) {
1252 dev_err(&intf->dev,
1253 "out of memory (write urbs usb_alloc_urb)\n");
1254 goto alloc_fail7;
1255 }
1256
1257 if (usb_endpoint_xfer_int(epwrite))
1258 usb_fill_int_urb(snd->urb, usb_dev,
1259 usb_sndintpipe(usb_dev, epwrite->bEndpointAddress),
1260 NULL, acm->writesize, acm_write_bulk, snd, epwrite->bInterval);
1261 else
1262 usb_fill_bulk_urb(snd->urb, usb_dev,
1263 usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress),
1264 NULL, acm->writesize, acm_write_bulk, snd);
1265 snd->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1266 snd->instance = acm;
1267 }
1268
1269 usb_set_intfdata(intf, acm);
1270
1271 i = device_create_file(&intf->dev, &dev_attr_bmCapabilities);
1272 if (i < 0)
1273 goto alloc_fail7;
1274
1275 if (cfd) { /* export the country data */
1276 acm->country_codes = kmalloc(cfd->bLength - 4, GFP_KERNEL);
1277 if (!acm->country_codes)
1278 goto skip_countries;
1279 acm->country_code_size = cfd->bLength - 4;
1280 memcpy(acm->country_codes, (u8 *)&cfd->wCountyCode0,
1281 cfd->bLength - 4);
1282 acm->country_rel_date = cfd->iCountryCodeRelDate;
1283
1284 i = device_create_file(&intf->dev, &dev_attr_wCountryCodes);
1285 if (i < 0) {
1286 kfree(acm->country_codes);
1287 acm->country_codes = NULL;
1288 acm->country_code_size = 0;
1289 goto skip_countries;
1290 }
1291
1292 i = device_create_file(&intf->dev,
1293 &dev_attr_iCountryCodeRelDate);
1294 if (i < 0) {
1295 device_remove_file(&intf->dev, &dev_attr_wCountryCodes);
1296 kfree(acm->country_codes);
1297 acm->country_codes = NULL;
1298 acm->country_code_size = 0;
1299 goto skip_countries;
1300 }
1301 }
1302
1303 skip_countries:
1304 usb_fill_int_urb(acm->ctrlurb, usb_dev,
1305 usb_rcvintpipe(usb_dev, epctrl->bEndpointAddress),
1306 acm->ctrl_buffer, ctrlsize, acm_ctrl_irq, acm,
1307 /* works around buggy devices */
1308 epctrl->bInterval ? epctrl->bInterval : 0xff);
1309 acm->ctrlurb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1310 acm->ctrlurb->transfer_dma = acm->ctrl_dma;
1311
1312 dev_info(&intf->dev, "ttyACM%d: USB ACM device\n", minor);
1313
1314 acm_set_control(acm, acm->ctrlout);
1315
1316 acm->line.dwDTERate = cpu_to_le32(9600);
1317 acm->line.bDataBits = 8;
1318 acm_set_line(acm, &acm->line);
1319
1320 usb_driver_claim_interface(&acm_driver, data_interface, acm);
1321 usb_set_intfdata(data_interface, acm);
1322
1323 usb_get_intf(control_interface);
1324 tty_dev = tty_port_register_device(&acm->port, acm_tty_driver, minor,
1325 &control_interface->dev);
1326 if (IS_ERR(tty_dev)) {
1327 rv = PTR_ERR(tty_dev);
1328 goto alloc_fail8;
1329 }
1330
1331 return 0;
1332 alloc_fail8:
1333 if (acm->country_codes) {
1334 device_remove_file(&acm->control->dev,
1335 &dev_attr_wCountryCodes);
1336 device_remove_file(&acm->control->dev,
1337 &dev_attr_iCountryCodeRelDate);
1338 }
1339 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities);
1340 alloc_fail7:
1341 usb_set_intfdata(intf, NULL);
1342 for (i = 0; i < ACM_NW; i++)
1343 usb_free_urb(acm->wb[i].urb);
1344 alloc_fail6:
1345 for (i = 0; i < num_rx_buf; i++)
1346 usb_free_urb(acm->read_urbs[i]);
1347 acm_read_buffers_free(acm);
1348 usb_free_urb(acm->ctrlurb);
1349 alloc_fail5:
1350 acm_write_buffers_free(acm);
1351 alloc_fail4:
1352 usb_free_coherent(usb_dev, ctrlsize, acm->ctrl_buffer, acm->ctrl_dma);
1353 alloc_fail2:
1354 acm_release_minor(acm);
1355 kfree(acm);
1356 alloc_fail:
1357 return rv;
1358 }
1359
1360 static void stop_data_traffic(struct acm *acm)
1361 {
1362 int i;
1363
1364 dev_dbg(&acm->control->dev, "%s\n", __func__);
1365
1366 usb_kill_urb(acm->ctrlurb);
1367 for (i = 0; i < ACM_NW; i++)
1368 usb_kill_urb(acm->wb[i].urb);
1369 for (i = 0; i < acm->rx_buflimit; i++)
1370 usb_kill_urb(acm->read_urbs[i]);
1371
1372 cancel_work_sync(&acm->work);
1373 }
1374
1375 static void acm_disconnect(struct usb_interface *intf)
1376 {
1377 struct acm *acm = usb_get_intfdata(intf);
1378 struct usb_device *usb_dev = interface_to_usbdev(intf);
1379 struct tty_struct *tty;
1380 int i;
1381
1382 dev_dbg(&intf->dev, "%s\n", __func__);
1383
1384 /* sibling interface is already cleaning up */
1385 if (!acm)
1386 return;
1387
1388 mutex_lock(&acm->mutex);
1389 acm->disconnected = true;
1390 if (acm->country_codes) {
1391 device_remove_file(&acm->control->dev,
1392 &dev_attr_wCountryCodes);
1393 device_remove_file(&acm->control->dev,
1394 &dev_attr_iCountryCodeRelDate);
1395 }
1396 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities);
1397 usb_set_intfdata(acm->control, NULL);
1398 usb_set_intfdata(acm->data, NULL);
1399 mutex_unlock(&acm->mutex);
1400
1401 tty = tty_port_tty_get(&acm->port);
1402 if (tty) {
1403 tty_vhangup(tty);
1404 tty_kref_put(tty);
1405 }
1406
1407 stop_data_traffic(acm);
1408
1409 tty_unregister_device(acm_tty_driver, acm->minor);
1410
1411 usb_free_urb(acm->ctrlurb);
1412 for (i = 0; i < ACM_NW; i++)
1413 usb_free_urb(acm->wb[i].urb);
1414 for (i = 0; i < acm->rx_buflimit; i++)
1415 usb_free_urb(acm->read_urbs[i]);
1416 acm_write_buffers_free(acm);
1417 usb_free_coherent(usb_dev, acm->ctrlsize, acm->ctrl_buffer, acm->ctrl_dma);
1418 acm_read_buffers_free(acm);
1419
1420 if (!acm->combined_interfaces)
1421 usb_driver_release_interface(&acm_driver, intf == acm->control ?
1422 acm->data : acm->control);
1423
1424 tty_port_put(&acm->port);
1425 }
1426
1427 #ifdef CONFIG_PM
1428 static int acm_suspend(struct usb_interface *intf, pm_message_t message)
1429 {
1430 struct acm *acm = usb_get_intfdata(intf);
1431 int cnt;
1432
1433 if (PMSG_IS_AUTO(message)) {
1434 int b;
1435
1436 spin_lock_irq(&acm->write_lock);
1437 b = acm->transmitting;
1438 spin_unlock_irq(&acm->write_lock);
1439 if (b)
1440 return -EBUSY;
1441 }
1442
1443 spin_lock_irq(&acm->read_lock);
1444 spin_lock(&acm->write_lock);
1445 cnt = acm->susp_count++;
1446 spin_unlock(&acm->write_lock);
1447 spin_unlock_irq(&acm->read_lock);
1448
1449 if (cnt)
1450 return 0;
1451
1452 if (test_bit(ASYNCB_INITIALIZED, &acm->port.flags))
1453 stop_data_traffic(acm);
1454
1455 return 0;
1456 }
1457
1458 static int acm_resume(struct usb_interface *intf)
1459 {
1460 struct acm *acm = usb_get_intfdata(intf);
1461 struct acm_wb *wb;
1462 int rv = 0;
1463 int cnt;
1464
1465 spin_lock_irq(&acm->read_lock);
1466 acm->susp_count -= 1;
1467 cnt = acm->susp_count;
1468 spin_unlock_irq(&acm->read_lock);
1469
1470 if (cnt)
1471 return 0;
1472
1473 if (test_bit(ASYNCB_INITIALIZED, &acm->port.flags)) {
1474 rv = usb_submit_urb(acm->ctrlurb, GFP_NOIO);
1475
1476 spin_lock_irq(&acm->write_lock);
1477 if (acm->delayed_wb) {
1478 wb = acm->delayed_wb;
1479 acm->delayed_wb = NULL;
1480 spin_unlock_irq(&acm->write_lock);
1481 acm_start_wb(acm, wb);
1482 } else {
1483 spin_unlock_irq(&acm->write_lock);
1484 }
1485
1486 /*
1487 * delayed error checking because we must
1488 * do the write path at all cost
1489 */
1490 if (rv < 0)
1491 goto err_out;
1492
1493 rv = acm_submit_read_urbs(acm, GFP_NOIO);
1494 }
1495
1496 err_out:
1497 return rv;
1498 }
1499
1500 static int acm_reset_resume(struct usb_interface *intf)
1501 {
1502 struct acm *acm = usb_get_intfdata(intf);
1503
1504 if (test_bit(ASYNCB_INITIALIZED, &acm->port.flags))
1505 tty_port_tty_hangup(&acm->port, false);
1506
1507 return acm_resume(intf);
1508 }
1509
1510 #endif /* CONFIG_PM */
1511
1512 #define NOKIA_PCSUITE_ACM_INFO(x) \
1513 USB_DEVICE_AND_INTERFACE_INFO(0x0421, x, \
1514 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \
1515 USB_CDC_ACM_PROTO_VENDOR)
1516
1517 #define SAMSUNG_PCSUITE_ACM_INFO(x) \
1518 USB_DEVICE_AND_INTERFACE_INFO(0x04e7, x, \
1519 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \
1520 USB_CDC_ACM_PROTO_VENDOR)
1521
1522 /*
1523 * USB driver structure.
1524 */
1525
1526 static const struct usb_device_id acm_ids[] = {
1527 /* quirky and broken devices */
1528 { USB_DEVICE(0x0870, 0x0001), /* Metricom GS Modem */
1529 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1530 },
1531 { USB_DEVICE(0x0e8d, 0x0003), /* FIREFLY, MediaTek Inc; andrey.arapov@gmail.com */
1532 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1533 },
1534 { USB_DEVICE(0x0e8d, 0x3329), /* MediaTek Inc GPS */
1535 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1536 },
1537 { USB_DEVICE(0x0482, 0x0203), /* KYOCERA AH-K3001V */
1538 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1539 },
1540 { USB_DEVICE(0x079b, 0x000f), /* BT On-Air USB MODEM */
1541 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1542 },
1543 { USB_DEVICE(0x0ace, 0x1602), /* ZyDAS 56K USB MODEM */
1544 .driver_info = SINGLE_RX_URB,
1545 },
1546 { USB_DEVICE(0x0ace, 0x1608), /* ZyDAS 56K USB MODEM */
1547 .driver_info = SINGLE_RX_URB, /* firmware bug */
1548 },
1549 { USB_DEVICE(0x0ace, 0x1611), /* ZyDAS 56K USB MODEM - new version */
1550 .driver_info = SINGLE_RX_URB, /* firmware bug */
1551 },
1552 { USB_DEVICE(0x22b8, 0x7000), /* Motorola Q Phone */
1553 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1554 },
1555 { USB_DEVICE(0x0803, 0x3095), /* Zoom Telephonics Model 3095F USB MODEM */
1556 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1557 },
1558 { USB_DEVICE(0x0572, 0x1321), /* Conexant USB MODEM CX93010 */
1559 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1560 },
1561 { USB_DEVICE(0x0572, 0x1324), /* Conexant USB MODEM RD02-D400 */
1562 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1563 },
1564 { USB_DEVICE(0x0572, 0x1328), /* Shiro / Aztech USB MODEM UM-3100 */
1565 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1566 },
1567 { USB_DEVICE(0x22b8, 0x6425), /* Motorola MOTOMAGX phones */
1568 },
1569 /* Motorola H24 HSPA module: */
1570 { USB_DEVICE(0x22b8, 0x2d91) }, /* modem */
1571 { USB_DEVICE(0x22b8, 0x2d92) }, /* modem + diagnostics */
1572 { USB_DEVICE(0x22b8, 0x2d93) }, /* modem + AT port */
1573 { USB_DEVICE(0x22b8, 0x2d95) }, /* modem + AT port + diagnostics */
1574 { USB_DEVICE(0x22b8, 0x2d96) }, /* modem + NMEA */
1575 { USB_DEVICE(0x22b8, 0x2d97) }, /* modem + diagnostics + NMEA */
1576 { USB_DEVICE(0x22b8, 0x2d99) }, /* modem + AT port + NMEA */
1577 { USB_DEVICE(0x22b8, 0x2d9a) }, /* modem + AT port + diagnostics + NMEA */
1578
1579 { USB_DEVICE(0x0572, 0x1329), /* Hummingbird huc56s (Conexant) */
1580 .driver_info = NO_UNION_NORMAL, /* union descriptor misplaced on
1581 data interface instead of
1582 communications interface.
1583 Maybe we should define a new
1584 quirk for this. */
1585 },
1586 { USB_DEVICE(0x0572, 0x1340), /* Conexant CX93010-2x UCMxx */
1587 .driver_info = NO_UNION_NORMAL,
1588 },
1589 { USB_DEVICE(0x05f9, 0x4002), /* PSC Scanning, Magellan 800i */
1590 .driver_info = NO_UNION_NORMAL,
1591 },
1592 { USB_DEVICE(0x1bbb, 0x0003), /* Alcatel OT-I650 */
1593 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */
1594 },
1595 { USB_DEVICE(0x1576, 0x03b1), /* Maretron USB100 */
1596 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */
1597 },
1598
1599 /* Nokia S60 phones expose two ACM channels. The first is
1600 * a modem and is picked up by the standard AT-command
1601 * information below. The second is 'vendor-specific' but
1602 * is treated as a serial device at the S60 end, so we want
1603 * to expose it on Linux too. */
1604 { NOKIA_PCSUITE_ACM_INFO(0x042D), }, /* Nokia 3250 */
1605 { NOKIA_PCSUITE_ACM_INFO(0x04D8), }, /* Nokia 5500 Sport */
1606 { NOKIA_PCSUITE_ACM_INFO(0x04C9), }, /* Nokia E50 */
1607 { NOKIA_PCSUITE_ACM_INFO(0x0419), }, /* Nokia E60 */
1608 { NOKIA_PCSUITE_ACM_INFO(0x044D), }, /* Nokia E61 */
1609 { NOKIA_PCSUITE_ACM_INFO(0x0001), }, /* Nokia E61i */
1610 { NOKIA_PCSUITE_ACM_INFO(0x0475), }, /* Nokia E62 */
1611 { NOKIA_PCSUITE_ACM_INFO(0x0508), }, /* Nokia E65 */
1612 { NOKIA_PCSUITE_ACM_INFO(0x0418), }, /* Nokia E70 */
1613 { NOKIA_PCSUITE_ACM_INFO(0x0425), }, /* Nokia N71 */
1614 { NOKIA_PCSUITE_ACM_INFO(0x0486), }, /* Nokia N73 */
1615 { NOKIA_PCSUITE_ACM_INFO(0x04DF), }, /* Nokia N75 */
1616 { NOKIA_PCSUITE_ACM_INFO(0x000e), }, /* Nokia N77 */
1617 { NOKIA_PCSUITE_ACM_INFO(0x0445), }, /* Nokia N80 */
1618 { NOKIA_PCSUITE_ACM_INFO(0x042F), }, /* Nokia N91 & N91 8GB */
1619 { NOKIA_PCSUITE_ACM_INFO(0x048E), }, /* Nokia N92 */
1620 { NOKIA_PCSUITE_ACM_INFO(0x0420), }, /* Nokia N93 */
1621 { NOKIA_PCSUITE_ACM_INFO(0x04E6), }, /* Nokia N93i */
1622 { NOKIA_PCSUITE_ACM_INFO(0x04B2), }, /* Nokia 5700 XpressMusic */
1623 { NOKIA_PCSUITE_ACM_INFO(0x0134), }, /* Nokia 6110 Navigator (China) */
1624 { NOKIA_PCSUITE_ACM_INFO(0x046E), }, /* Nokia 6110 Navigator */
1625 { NOKIA_PCSUITE_ACM_INFO(0x002f), }, /* Nokia 6120 classic & */
1626 { NOKIA_PCSUITE_ACM_INFO(0x0088), }, /* Nokia 6121 classic */
1627 { NOKIA_PCSUITE_ACM_INFO(0x00fc), }, /* Nokia 6124 classic */
1628 { NOKIA_PCSUITE_ACM_INFO(0x0042), }, /* Nokia E51 */
1629 { NOKIA_PCSUITE_ACM_INFO(0x00b0), }, /* Nokia E66 */
1630 { NOKIA_PCSUITE_ACM_INFO(0x00ab), }, /* Nokia E71 */
1631 { NOKIA_PCSUITE_ACM_INFO(0x0481), }, /* Nokia N76 */
1632 { NOKIA_PCSUITE_ACM_INFO(0x0007), }, /* Nokia N81 & N81 8GB */
1633 { NOKIA_PCSUITE_ACM_INFO(0x0071), }, /* Nokia N82 */
1634 { NOKIA_PCSUITE_ACM_INFO(0x04F0), }, /* Nokia N95 & N95-3 NAM */
1635 { NOKIA_PCSUITE_ACM_INFO(0x0070), }, /* Nokia N95 8GB */
1636 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */
1637 { NOKIA_PCSUITE_ACM_INFO(0x0099), }, /* Nokia 6210 Navigator, RM-367 */
1638 { NOKIA_PCSUITE_ACM_INFO(0x0128), }, /* Nokia 6210 Navigator, RM-419 */
1639 { NOKIA_PCSUITE_ACM_INFO(0x008f), }, /* Nokia 6220 Classic */
1640 { NOKIA_PCSUITE_ACM_INFO(0x00a0), }, /* Nokia 6650 */
1641 { NOKIA_PCSUITE_ACM_INFO(0x007b), }, /* Nokia N78 */
1642 { NOKIA_PCSUITE_ACM_INFO(0x0094), }, /* Nokia N85 */
1643 { NOKIA_PCSUITE_ACM_INFO(0x003a), }, /* Nokia N96 & N96-3 */
1644 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */
1645 { NOKIA_PCSUITE_ACM_INFO(0x0108), }, /* Nokia 5320 XpressMusic 2G */
1646 { NOKIA_PCSUITE_ACM_INFO(0x01f5), }, /* Nokia N97, RM-505 */
1647 { NOKIA_PCSUITE_ACM_INFO(0x02e3), }, /* Nokia 5230, RM-588 */
1648 { NOKIA_PCSUITE_ACM_INFO(0x0178), }, /* Nokia E63 */
1649 { NOKIA_PCSUITE_ACM_INFO(0x010e), }, /* Nokia E75 */
1650 { NOKIA_PCSUITE_ACM_INFO(0x02d9), }, /* Nokia 6760 Slide */
1651 { NOKIA_PCSUITE_ACM_INFO(0x01d0), }, /* Nokia E52 */
1652 { NOKIA_PCSUITE_ACM_INFO(0x0223), }, /* Nokia E72 */
1653 { NOKIA_PCSUITE_ACM_INFO(0x0275), }, /* Nokia X6 */
1654 { NOKIA_PCSUITE_ACM_INFO(0x026c), }, /* Nokia N97 Mini */
1655 { NOKIA_PCSUITE_ACM_INFO(0x0154), }, /* Nokia 5800 XpressMusic */
1656 { NOKIA_PCSUITE_ACM_INFO(0x04ce), }, /* Nokia E90 */
1657 { NOKIA_PCSUITE_ACM_INFO(0x01d4), }, /* Nokia E55 */
1658 { NOKIA_PCSUITE_ACM_INFO(0x0302), }, /* Nokia N8 */
1659 { NOKIA_PCSUITE_ACM_INFO(0x0335), }, /* Nokia E7 */
1660 { NOKIA_PCSUITE_ACM_INFO(0x03cd), }, /* Nokia C7 */
1661 { SAMSUNG_PCSUITE_ACM_INFO(0x6651), }, /* Samsung GTi8510 (INNOV8) */
1662
1663 /* Support for Owen devices */
1664 { USB_DEVICE(0x03eb, 0x0030), }, /* Owen SI30 */
1665
1666 /* NOTE: non-Nokia COMM/ACM/0xff is likely MSFT RNDIS... NOT a modem! */
1667
1668 /* Support Lego NXT using pbLua firmware */
1669 { USB_DEVICE(0x0694, 0xff00),
1670 .driver_info = NOT_A_MODEM,
1671 },
1672
1673 /* Support for Droids MuIn LCD */
1674 { USB_DEVICE(0x04d8, 0x000b),
1675 .driver_info = NO_DATA_INTERFACE,
1676 },
1677
1678 /* control interfaces without any protocol set */
1679 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1680 USB_CDC_PROTO_NONE) },
1681
1682 /* control interfaces with various AT-command sets */
1683 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1684 USB_CDC_ACM_PROTO_AT_V25TER) },
1685 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1686 USB_CDC_ACM_PROTO_AT_PCCA101) },
1687 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1688 USB_CDC_ACM_PROTO_AT_PCCA101_WAKE) },
1689 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1690 USB_CDC_ACM_PROTO_AT_GSM) },
1691 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1692 USB_CDC_ACM_PROTO_AT_3G) },
1693 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
1694 USB_CDC_ACM_PROTO_AT_CDMA) },
1695
1696 { }
1697 };
1698
1699 MODULE_DEVICE_TABLE(usb, acm_ids);
1700
1701 static struct usb_driver acm_driver = {
1702 .name = "cdc_acm",
1703 .probe = acm_probe,
1704 .disconnect = acm_disconnect,
1705 #ifdef CONFIG_PM
1706 .suspend = acm_suspend,
1707 .resume = acm_resume,
1708 .reset_resume = acm_reset_resume,
1709 #endif
1710 .id_table = acm_ids,
1711 #ifdef CONFIG_PM
1712 .supports_autosuspend = 1,
1713 #endif
1714 .disable_hub_initiated_lpm = 1,
1715 };
1716
1717 /*
1718 * TTY driver structures.
1719 */
1720
1721 static const struct tty_operations acm_ops = {
1722 .install = acm_tty_install,
1723 .open = acm_tty_open,
1724 .close = acm_tty_close,
1725 .cleanup = acm_tty_cleanup,
1726 .hangup = acm_tty_hangup,
1727 .write = acm_tty_write,
1728 .write_room = acm_tty_write_room,
1729 .ioctl = acm_tty_ioctl,
1730 .throttle = acm_tty_throttle,
1731 .unthrottle = acm_tty_unthrottle,
1732 .chars_in_buffer = acm_tty_chars_in_buffer,
1733 .break_ctl = acm_tty_break_ctl,
1734 .set_termios = acm_tty_set_termios,
1735 .tiocmget = acm_tty_tiocmget,
1736 .tiocmset = acm_tty_tiocmset,
1737 };
1738
1739 /*
1740 * Init / exit.
1741 */
1742
1743 static int __init acm_init(void)
1744 {
1745 int retval;
1746 acm_tty_driver = alloc_tty_driver(ACM_TTY_MINORS);
1747 if (!acm_tty_driver)
1748 return -ENOMEM;
1749 acm_tty_driver->driver_name = "acm",
1750 acm_tty_driver->name = "ttyACM",
1751 acm_tty_driver->major = ACM_TTY_MAJOR,
1752 acm_tty_driver->minor_start = 0,
1753 acm_tty_driver->type = TTY_DRIVER_TYPE_SERIAL,
1754 acm_tty_driver->subtype = SERIAL_TYPE_NORMAL,
1755 acm_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
1756 acm_tty_driver->init_termios = tty_std_termios;
1757 acm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD |
1758 HUPCL | CLOCAL;
1759 tty_set_operations(acm_tty_driver, &acm_ops);
1760
1761 retval = tty_register_driver(acm_tty_driver);
1762 if (retval) {
1763 put_tty_driver(acm_tty_driver);
1764 return retval;
1765 }
1766
1767 retval = usb_register(&acm_driver);
1768 if (retval) {
1769 tty_unregister_driver(acm_tty_driver);
1770 put_tty_driver(acm_tty_driver);
1771 return retval;
1772 }
1773
1774 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n");
1775
1776 return 0;
1777 }
1778
1779 static void __exit acm_exit(void)
1780 {
1781 usb_deregister(&acm_driver);
1782 tty_unregister_driver(acm_tty_driver);
1783 put_tty_driver(acm_tty_driver);
1784 }
1785
1786 module_init(acm_init);
1787 module_exit(acm_exit);
1788
1789 MODULE_AUTHOR(DRIVER_AUTHOR);
1790 MODULE_DESCRIPTION(DRIVER_DESC);
1791 MODULE_LICENSE("GPL");
1792 MODULE_ALIAS_CHARDEV_MAJOR(ACM_TTY_MAJOR);
kernel source for telekom puls (alcatel/mediatek)