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Merge tag 'v3.10.107' into update
[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 #ifdef CONFIG_MTK_DT_USB_SUPPORT
54
55 /* adjust to 1 to avoid musb bug when lots write with clean urb */
56 #undef ACM_NW
57 #define ACM_NW 1
58 /* adjust SZ to hsmaxp*20 to prevent tty disc don't accept big size write */
59 #define ACM_WB_SZ (512*20)
60
61 #define DATA_DUMP_BYTES 15 // wx, how many bytes we'll print out for each packet
62 #define DATA_DUMP_SIZE 64 // wx, should be large enough to hold DATA_DUMP_DIGITS
63 static unsigned char data_out[DATA_DUMP_SIZE];
64 static unsigned char data_in[DATA_DUMP_SIZE];
65 /* Debug functions */
66 static int enable_debug = 0;
67 static int enable_dump = 0;
68 //origninal CDC-ACM log, more detail
69 #undef dev_dbg
70 #define dev_dbg(dev, format, args...) \
71 do{ \
72 if(enable_debug) { \
73 dev_printk(KERN_WARNING, dev, "[CDC-ACM] " format, ##args); \
74 } \
75 }while(0)
76 #undef dev_vdbg
77 #define dev_vdbg dev_dbg
78 //MTK added CDC-ACM log, more critical
79 #define dbg_mtk(dev, format, args...) \
80 do{ \
81 dev_printk(KERN_WARNING, dev, "[CDC-ACM-MTK] " format "\n", ##args); \
82 }while(0)
83 #else
84 #define dbg_mtk(dev, format, args...) do{}while(0)
85 #endif
86
87
88 #define DRIVER_AUTHOR "Armin Fuerst, Pavel Machek, Johannes Erdfelt, Vojtech Pavlik, David Kubicek, Johan Hovold"
89 #define DRIVER_DESC "USB Abstract Control Model driver for USB modems and ISDN adapters"
90
91 static struct usb_driver acm_driver;
92 static struct tty_driver *acm_tty_driver;
93 static struct acm *acm_table[ACM_TTY_MINORS];
94
95 static DEFINE_MUTEX(acm_table_lock);
96
97 #define MYDBG(fmt, args...) do {printk(KERN_WARNING "MTK_ACM, <%s(), %d> " fmt, __func__, __LINE__, ## args); }while(0)
98
99 #ifdef CONFIG_MTK_DT_USB_SUPPORT
100
101 #define RECORD_SZ 100
102 #define DUMP_DELAY 3
103 struct record_entry
104 {
105 struct timeval cur_time;
106 u32 transfer_buffer_length;
107 u32 actual_length;
108 int status;
109 unsigned char data;
110
111 }w1[RECORD_SZ], w2[RECORD_SZ], r1[RECORD_SZ], r2[RECORD_SZ];
112
113 static int w1_idx, w2_idx, r1_idx, r2_idx;
114 static int record_enable = 0;
115 static struct timeval tv_start;
116 void dump_record(void)
117 {
118 int i, index_limit;
119 struct record_entry *ptr;
120
121 index_limit = w1_idx;
122 ptr = w1;
123 for(i = 0; i < index_limit; i++){
124 MYDBG("w1, time:(%d,%d), reqlen:%d, data:%x\n",
125 (unsigned int)ptr[i].cur_time.tv_sec, (unsigned int)ptr[i].cur_time.tv_usec, (unsigned int)ptr[i].transfer_buffer_length, ptr[i].data);
126 mdelay(DUMP_DELAY);
127 }
128
129 index_limit = r1_idx;
130 ptr = r1;
131 for(i = 0; i < index_limit; i++){
132 MYDBG("r1, time:(%d,%d), reqlen:%d\n",
133 (unsigned int)ptr[i].cur_time.tv_sec, (unsigned int)ptr[i].cur_time.tv_usec, ptr[i].transfer_buffer_length);
134 mdelay(DUMP_DELAY);
135 }
136
137 index_limit = w2_idx;
138 ptr = w2;
139 for(i = 0; i < index_limit; i++){
140 MYDBG("w2, time:(%d,%d), reqlen:%d, actlen:%d, status:%d, data:%x\n",
141 (unsigned int)ptr[i].cur_time.tv_sec, (unsigned int)ptr[i].cur_time.tv_usec, ptr[i].transfer_buffer_length, ptr[i].actual_length, ptr[i].status, ptr[i].data);
142 mdelay(DUMP_DELAY);
143 }
144
145 index_limit = r2_idx;
146 ptr = r2;
147 for(i = 0; i < index_limit; i++){
148 MYDBG("r2, time:(%d,%d), reqlen:%d, actlen:%d, status:%d, data:%x\n",
149 (unsigned int)ptr[i].cur_time.tv_sec, (unsigned int)ptr[i].cur_time.tv_usec, ptr[i].transfer_buffer_length, ptr[i].actual_length, ptr[i].status, ptr[i].data);
150 mdelay(DUMP_DELAY);
151 }
152
153 }
154 void record_activity(struct urb *urb, int is_in, int is_complete)
155 {
156 struct timeval tv_time;
157
158 if(!record_enable)
159 return;
160
161 do_gettimeofday(&tv_time);
162 tv_time.tv_sec = tv_time.tv_sec - tv_start.tv_sec;
163 tv_time.tv_usec = tv_time.tv_usec - tv_start.tv_usec;
164 if(is_in){
165 if(is_complete){
166 if(r2_idx >= RECORD_SZ)
167 return;
168
169 r2[r2_idx].cur_time = tv_time;
170 r2[r2_idx].transfer_buffer_length = urb->transfer_buffer_length;
171 r2[r2_idx].actual_length = urb->actual_length;
172 r2[r2_idx].status = urb->status;
173 r2[r2_idx].data = *((unsigned char*)urb->transfer_buffer);
174 r2_idx++;
175 return;
176 }
177 if(r1_idx >= RECORD_SZ)
178 return;
179 r1[r1_idx].cur_time = tv_time;
180 r1[r1_idx].transfer_buffer_length = urb->transfer_buffer_length;
181 r1[r1_idx].actual_length = urb->actual_length;
182 r1[r1_idx].status = urb->status;
183 r1_idx++;
184 }else{
185 if(is_complete){
186 if(w2_idx >= RECORD_SZ)
187 return;
188 w2[w2_idx].cur_time = tv_time;
189 w2[w2_idx].transfer_buffer_length = urb->transfer_buffer_length;
190 w2[w2_idx].actual_length = urb->actual_length;
191 w2[w2_idx].status = urb->status;
192 w2[w2_idx].data = *((unsigned char*)urb->transfer_buffer);
193 w2_idx++;
194 return;
195 }
196 if(w1_idx >= RECORD_SZ)
197 return;
198 w1[w1_idx].cur_time = tv_time;
199 w1[w1_idx].transfer_buffer_length = urb->transfer_buffer_length;
200 w1[w1_idx].actual_length = urb->actual_length;
201 w1[w1_idx].status = urb->status;
202 w1[w1_idx].data = *((unsigned char*)urb->transfer_buffer);
203 w1_idx++;
204 }
205 }
206
207 bool usb_h_acm_all_clear(void)
208 {
209 int i;
210 int count = 0;
211 for (i = 0; i < ACM_TTY_MINORS; i++) {
212 if(acm_table[i] != NULL) {
213 count++;
214 }
215 }
216 MYDBG("count<%d>\n", count);
217 return !count;
218 }
219 EXPORT_SYMBOL_GPL(usb_h_acm_all_clear);
220
221 #define CHECK_INTERVAL 2
222 #define CB_NUM 3
223 extern unsigned long volatile jiffies;
224 static unsigned long callback_check_timeout[CB_NUM];
225 static char *callback_name[CB_NUM] = {
226 "acm_read_bulk_callback",
227 "acm_write_bulk",
228 "acm_ctrl_irq",
229 };
230 void mark_callback_alive(char *func_name, struct urb *urb, struct acm *acm)
231 {
232
233
234 int i;
235 for(i = 0; i < CB_NUM ; i++)
236 {
237 if(!strcmp(func_name, callback_name[i])){
238 if(enable_debug || time_after(jiffies, callback_check_timeout[i]))
239 {
240 MYDBG("%s,ep(%d),len(%d,%d),data(%x),sts(%d), minor(%d)\n",
241 func_name,
242 urb->ep->desc.bEndpointAddress,
243 urb->actual_length,
244 urb->transfer_buffer_length,
245 *((unsigned char*)urb->transfer_buffer),
246 urb->status,
247 acm->minor);
248 callback_check_timeout[i] = jiffies + HZ * CHECK_INTERVAL;
249 }
250 break;
251 }
252 }
253 }
254
255
256 #endif
257
258 /*
259 * acm_table accessors
260 */
261
262 /*
263 * Look up an ACM structure by index. If found and not disconnected, increment
264 * its refcount and return it with its mutex held.
265 */
266 static struct acm *acm_get_by_index(unsigned index)
267 {
268 struct acm *acm;
269
270 mutex_lock(&acm_table_lock);
271 acm = acm_table[index];
272 if (acm) {
273 mutex_lock(&acm->mutex);
274 if (acm->disconnected) {
275 mutex_unlock(&acm->mutex);
276 acm = NULL;
277 } else {
278 tty_port_get(&acm->port);
279 mutex_unlock(&acm->mutex);
280 }
281 }
282 mutex_unlock(&acm_table_lock);
283 return acm;
284 }
285
286 /*
287 * Try to find an available minor number and if found, associate it with 'acm'.
288 */
289 static int acm_alloc_minor(struct acm *acm)
290 {
291 int minor;
292
293 mutex_lock(&acm_table_lock);
294 for (minor = 0; minor < ACM_TTY_MINORS; minor++) {
295 if (!acm_table[minor]) {
296 acm_table[minor] = acm;
297 break;
298 }
299 }
300 mutex_unlock(&acm_table_lock);
301
302 return minor;
303 }
304
305 /* Release the minor number associated with 'acm'. */
306 static void acm_release_minor(struct acm *acm)
307 {
308 mutex_lock(&acm_table_lock);
309 acm_table[acm->minor] = NULL;
310 mutex_unlock(&acm_table_lock);
311 }
312
313 /*
314 * Functions for ACM control messages.
315 */
316
317 static int acm_ctrl_msg(struct acm *acm, int request, int value,
318 void *buf, int len)
319 {
320 int retval;
321
322 retval = usb_autopm_get_interface(acm->control);
323 if (retval)
324 return retval;
325
326 retval = usb_control_msg(acm->dev, usb_sndctrlpipe(acm->dev, 0),
327 request, USB_RT_ACM, value,
328 acm->control->altsetting[0].desc.bInterfaceNumber,
329 buf, len, 5000);
330
331 dev_dbg(&acm->control->dev,
332 "%s - rq 0x%02x, val %#x, len %#x, result %d\n",
333 __func__, request, value, len, retval);
334
335 usb_autopm_put_interface(acm->control);
336
337 return retval < 0 ? retval : 0;
338 }
339
340 /* devices aren't required to support these requests.
341 * the cdc acm descriptor tells whether they do...
342 */
343 #define acm_set_control(acm, control) \
344 acm_ctrl_msg(acm, USB_CDC_REQ_SET_CONTROL_LINE_STATE, control, NULL, 0)
345 #define acm_set_line(acm, line) \
346 acm_ctrl_msg(acm, USB_CDC_REQ_SET_LINE_CODING, 0, line, sizeof *(line))
347 #define acm_send_break(acm, ms) \
348 acm_ctrl_msg(acm, USB_CDC_REQ_SEND_BREAK, ms, NULL, 0)
349
350 /*
351 * Write buffer management.
352 * All of these assume proper locks taken by the caller.
353 */
354
355 static int acm_wb_alloc(struct acm *acm)
356 {
357 int i, wbn;
358 struct acm_wb *wb;
359
360 wbn = 0;
361 i = 0;
362 for (;;) {
363 wb = &acm->wb[wbn];
364 if (!wb->use) {
365 wb->use = 1;
366 return wbn;
367 }
368 wbn = (wbn + 1) % ACM_NW;
369 if (++i >= ACM_NW)
370 return -1;
371 }
372 }
373
374 static int acm_wb_is_avail(struct acm *acm)
375 {
376 int i, n;
377 unsigned long flags;
378
379 n = ACM_NW;
380 spin_lock_irqsave(&acm->write_lock, flags);
381 for (i = 0; i < ACM_NW; i++)
382 n -= acm->wb[i].use;
383 spin_unlock_irqrestore(&acm->write_lock, flags);
384 return n;
385 }
386
387 /*
388 * Finish write. Caller must hold acm->write_lock
389 */
390 static void acm_write_done(struct acm *acm, struct acm_wb *wb)
391 {
392 wb->use = 0;
393 acm->transmitting--;
394 usb_autopm_put_interface_async(acm->control);
395 }
396
397 /*
398 * Poke write.
399 *
400 * the caller is responsible for locking
401 */
402
403 static int acm_start_wb(struct acm *acm, struct acm_wb *wb)
404 {
405 int rc;
406
407 acm->transmitting++;
408
409 wb->urb->transfer_buffer = wb->buf;
410 wb->urb->transfer_dma = wb->dmah;
411 wb->urb->transfer_buffer_length = wb->len;
412 wb->urb->dev = acm->dev;
413
414 #ifdef CONFIG_MTK_DT_USB_SUPPORT
415 record_activity(wb->urb, 0, 0);
416 #endif
417 rc = usb_submit_urb(wb->urb, GFP_ATOMIC);
418 if (rc < 0) {
419 dev_err(&acm->data->dev,
420 "%s - usb_submit_urb(write bulk) failed: %d\n",
421 __func__, rc);
422 acm_write_done(acm, wb);
423 }
424 return rc;
425 }
426
427 static int acm_write_start(struct acm *acm, int wbn)
428 {
429 unsigned long flags;
430 struct acm_wb *wb = &acm->wb[wbn];
431 int rc;
432
433 spin_lock_irqsave(&acm->write_lock, flags);
434 if (!acm->dev) {
435 wb->use = 0;
436 spin_unlock_irqrestore(&acm->write_lock, flags);
437 return -ENODEV;
438 }
439
440 dev_vdbg(&acm->data->dev, "%s - susp_count %d\n", __func__,
441 acm->susp_count);
442 usb_autopm_get_interface_async(acm->control);
443 if (acm->susp_count) {
444 usb_anchor_urb(wb->urb, &acm->delayed);
445 spin_unlock_irqrestore(&acm->write_lock, flags);
446 return 0;
447 }
448 usb_mark_last_busy(acm->dev);
449
450 rc = acm_start_wb(acm, wb);
451 spin_unlock_irqrestore(&acm->write_lock, flags);
452
453 return rc;
454
455 }
456 /*
457 * attributes exported through sysfs
458 */
459 static ssize_t show_caps
460 (struct device *dev, struct device_attribute *attr, char *buf)
461 {
462 struct usb_interface *intf = to_usb_interface(dev);
463 struct acm *acm = usb_get_intfdata(intf);
464
465 return sprintf(buf, "%d", acm->ctrl_caps);
466 }
467 static DEVICE_ATTR(bmCapabilities, S_IRUGO, show_caps, NULL);
468
469 static ssize_t show_country_codes
470 (struct device *dev, struct device_attribute *attr, char *buf)
471 {
472 struct usb_interface *intf = to_usb_interface(dev);
473 struct acm *acm = usb_get_intfdata(intf);
474
475 memcpy(buf, acm->country_codes, acm->country_code_size);
476 return acm->country_code_size;
477 }
478
479 static DEVICE_ATTR(wCountryCodes, S_IRUGO, show_country_codes, NULL);
480
481 static ssize_t show_country_rel_date
482 (struct device *dev, struct device_attribute *attr, char *buf)
483 {
484 struct usb_interface *intf = to_usb_interface(dev);
485 struct acm *acm = usb_get_intfdata(intf);
486
487 return sprintf(buf, "%d", acm->country_rel_date);
488 }
489
490 static DEVICE_ATTR(iCountryCodeRelDate, S_IRUGO, show_country_rel_date, NULL);
491 /*
492 * Interrupt handlers for various ACM device responses
493 */
494
495 /* control interface reports status changes with "interrupt" transfers */
496 static void acm_ctrl_irq(struct urb *urb)
497 {
498 struct acm *acm = urb->context;
499 struct usb_cdc_notification *dr = urb->transfer_buffer;
500 unsigned char *data;
501 int newctrl;
502 int retval;
503 int status = urb->status;
504
505 switch (status) {
506 case 0:
507 /* success */
508 break;
509 case -ECONNRESET:
510 case -ENOENT:
511 case -ESHUTDOWN:
512 /* this urb is terminated, clean up */
513 dev_err(&acm->control->dev,
514 "%s - urb shutting down with status: %d\n",
515 __func__, status);
516 return;
517 default:
518 dev_err(&acm->control->dev,
519 "%s - nonzero urb status received: %d\n",
520 __func__, status);
521 goto exit;
522 }
523
524 usb_mark_last_busy(acm->dev);
525 #ifdef CONFIG_MTK_DT_USB_SUPPORT
526 mark_callback_alive(__func__, urb, acm);
527 #endif
528
529 data = (unsigned char *)(dr + 1);
530 switch (dr->bNotificationType) {
531 case USB_CDC_NOTIFY_NETWORK_CONNECTION:
532 dev_dbg(&acm->control->dev, "%s - network connection: %d\n",
533 __func__, dr->wValue);
534 break;
535
536 case USB_CDC_NOTIFY_SERIAL_STATE:
537 newctrl = get_unaligned_le16(data);
538
539 if (!acm->clocal && (acm->ctrlin & ~newctrl & ACM_CTRL_DCD)) {
540 dev_dbg(&acm->control->dev, "%s - calling hangup\n",
541 __func__);
542 tty_port_tty_hangup(&acm->port, false);
543 }
544
545 acm->ctrlin = newctrl;
546
547 dev_dbg(&acm->control->dev,
548 "%s - input control lines: dcd%c dsr%c break%c "
549 "ring%c framing%c parity%c overrun%c\n",
550 __func__,
551 acm->ctrlin & ACM_CTRL_DCD ? '+' : '-',
552 acm->ctrlin & ACM_CTRL_DSR ? '+' : '-',
553 acm->ctrlin & ACM_CTRL_BRK ? '+' : '-',
554 acm->ctrlin & ACM_CTRL_RI ? '+' : '-',
555 acm->ctrlin & ACM_CTRL_FRAMING ? '+' : '-',
556 acm->ctrlin & ACM_CTRL_PARITY ? '+' : '-',
557 acm->ctrlin & ACM_CTRL_OVERRUN ? '+' : '-');
558 break;
559
560 default:
561 dev_dbg(&acm->control->dev,
562 "%s - unknown notification %d received: index %d "
563 "len %d data0 %d data1 %d\n",
564 __func__,
565 dr->bNotificationType, dr->wIndex,
566 dr->wLength, data[0], data[1]);
567 break;
568 }
569 exit:
570 retval = usb_submit_urb(urb, GFP_ATOMIC);
571 if (retval)
572 dev_err(&acm->control->dev, "%s - usb_submit_urb failed: %d\n",
573 __func__, retval);
574 }
575
576 static int acm_submit_read_urb(struct acm *acm, int index, gfp_t mem_flags)
577 {
578 int res;
579
580 if (!test_and_clear_bit(index, &acm->read_urbs_free)){
581 return 0;
582 }
583
584 dev_vdbg(&acm->data->dev, "%s - urb %d\n", __func__, index);
585
586 #ifdef CONFIG_MTK_DT_USB_SUPPORT
587 record_activity(acm->read_urbs[index], 1, 0);
588 #endif
589
590 res = usb_submit_urb(acm->read_urbs[index], mem_flags);
591 if (res) {
592 MYDBG("urb fail(%d)\n", res);
593 if (res != -EPERM) {
594 dev_err(&acm->data->dev,
595 "%s - usb_submit_urb failed: %d\n",
596 __func__, res);
597 }
598 set_bit(index, &acm->read_urbs_free);
599 return res;
600 }
601
602 return 0;
603 }
604
605 static int acm_submit_read_urbs(struct acm *acm, gfp_t mem_flags)
606 {
607 int res;
608 int i;
609
610 for (i = 0; i < acm->rx_buflimit; ++i) {
611 res = acm_submit_read_urb(acm, i, mem_flags);
612 if (res){
613 return res;
614 }
615 }
616
617 return 0;
618 }
619
620 static void acm_process_read_urb(struct acm *acm, struct urb *urb)
621 {
622
623 #ifdef CONFIG_MTK_DT_USB_SUPPORT
624 int i, len;
625 #endif
626 if (!urb->actual_length){
627 return;
628 }
629 #ifdef CONFIG_MTK_DT_USB_SUPPORT
630 if(enable_dump) {
631 len = sprintf(data_in, "DT-I: ");
632 for(i=0; i<urb->actual_length && i<DATA_DUMP_BYTES; i++) {
633 len += sprintf(data_in+len, "%02X ", *(((unsigned char *)(urb->transfer_buffer))+i));
634 }
635 sprintf(data_in+len, "\n");
636 dbg_mtk(&acm->data->dev, "%s", data_in);
637 }
638 #endif
639
640 tty_insert_flip_string(&acm->port, urb->transfer_buffer,
641 urb->actual_length);
642 tty_flip_buffer_push(&acm->port);
643 }
644
645 static void acm_read_bulk_callback(struct urb *urb)
646 {
647 struct acm_rb *rb = urb->context;
648 struct acm *acm = rb->instance;
649 unsigned long flags;
650
651 dev_vdbg(&acm->data->dev, "%s - urb %d, len %d\n", __func__,
652 rb->index, urb->actual_length);
653 set_bit(rb->index, &acm->read_urbs_free);
654
655 #ifdef CONFIG_MTK_DT_USB_SUPPORT
656 record_activity(urb, 1, 1);
657 #endif
658
659 if (!acm->dev) {
660 dev_dbg(&acm->data->dev, "%s - disconnected\n", __func__);
661 return;
662 }
663 usb_mark_last_busy(acm->dev);
664
665 if (urb->status) {
666 dev_err(&acm->data->dev, "%s - non-zero urb status: %d\n",
667 __func__, urb->status);
668 return;
669 }
670 #ifdef CONFIG_MTK_DT_USB_SUPPORT
671 mark_callback_alive(__func__, urb, acm);
672 #endif
673 acm_process_read_urb(acm, urb);
674
675 /* throttle device if requested by tty */
676 spin_lock_irqsave(&acm->read_lock, flags);
677 acm->throttled = acm->throttle_req;
678 if (!acm->throttled && !acm->susp_count) {
679 spin_unlock_irqrestore(&acm->read_lock, flags);
680 acm_submit_read_urb(acm, rb->index, GFP_ATOMIC);
681 } else {
682 spin_unlock_irqrestore(&acm->read_lock, flags);
683 }
684 }
685
686 /* data interface wrote those outgoing bytes */
687 static void acm_write_bulk(struct urb *urb)
688 {
689 struct acm_wb *wb = urb->context;
690 struct acm *acm = wb->instance;
691 unsigned long flags;
692
693
694 if (urb->status || (urb->actual_length != urb->transfer_buffer_length)){
695 dev_err(&acm->data->dev, "%s - len %d/%d, status %d, data(%x)\n",
696 __func__,
697 urb->actual_length,
698 urb->transfer_buffer_length,
699 urb->status,
700 *((char *)(urb->transfer_buffer)));
701 }
702 #ifdef CONFIG_MTK_DT_USB_SUPPORT
703 record_activity(urb, 0, 1);
704 #endif
705
706 #ifdef CONFIG_MTK_DT_USB_SUPPORT
707 mark_callback_alive(__func__, urb, acm);
708 #endif
709 spin_lock_irqsave(&acm->write_lock, flags);
710 acm_write_done(acm, wb);
711 spin_unlock_irqrestore(&acm->write_lock, flags);
712 schedule_work(&acm->work);
713 }
714
715 static void acm_softint(struct work_struct *work)
716 {
717 struct acm *acm = container_of(work, struct acm, work);
718
719 dev_vdbg(&acm->data->dev, "%s\n", __func__);
720
721 tty_port_tty_wakeup(&acm->port);
722 }
723
724 /*
725 * TTY handlers
726 */
727
728 static int acm_tty_install(struct tty_driver *driver, struct tty_struct *tty)
729 {
730 struct acm *acm;
731 int retval;
732
733 dev_dbg(tty->dev, "%s\n", __func__);
734
735 acm = acm_get_by_index(tty->index);
736 if (!acm)
737 return -ENODEV;
738
739 retval = tty_standard_install(driver, tty);
740 if (retval)
741 goto error_init_termios;
742
743 tty->driver_data = acm;
744
745 return 0;
746
747 error_init_termios:
748 tty_port_put(&acm->port);
749 return retval;
750 }
751
752 #ifdef CONFIG_MTK_DT_USB_SUPPORT
753 extern struct usb_device *get_usb11_child_udev(void);
754 extern int usb_autoresume_device(struct usb_device *udev);
755 #endif
756 static int acm_tty_open(struct tty_struct *tty, struct file *filp)
757 {
758 #ifdef CONFIG_MTK_DT_USB_SUPPORT
759 struct usb_device *udev;
760 int result;
761 #endif
762 struct acm *acm;
763 acm = tty->driver_data;
764
765 #ifdef CONFIG_MTK_DT_USB_SUPPORT
766 dbg_mtk(&acm->control->dev, "%s port_cnt=%d", __func__, acm->port.count);
767 MYDBG("ctrl:%x, read:%x, write:%x\n",
768 (acm->control->cur_altsetting->endpoint[0].desc).bEndpointAddress,
769 (acm->data->cur_altsetting->endpoint[0].desc).bEndpointAddress,
770 (acm->data->cur_altsetting->endpoint[1].desc).bEndpointAddress);
771
772
773 #define META_BIN_NAME "meta_tst"
774 #define MDDOWNLOADER_BIN_NAME "downloader"
775
776 /* make sure usb1 is always alive in dl/meta mode */
777 if(!strcmp(META_BIN_NAME, current->comm) || !strcmp(MDDOWNLOADER_BIN_NAME, current->comm)){
778 udev = get_usb11_child_udev();
779 result = usb_autoresume_device(udev);
780 dbg_mtk(&acm->control->dev, "%s, auto result:%d", __func__, result);
781 }
782
783 if(!strcmp(MDDOWNLOADER_BIN_NAME, current->comm)){
784 record_enable = 1;
785 w1_idx = w2_idx = r1_idx = r2_idx = 0;
786 do_gettimeofday(&tv_start);
787 }
788
789 #else
790 dev_dbg(&acm->control->dev, "%s\n", __func__);
791 #endif
792 dev_dbg(tty->dev, "%s\n", __func__);
793
794 return tty_port_open(&acm->port, tty, filp);
795 }
796
797 static int acm_port_activate(struct tty_port *port, struct tty_struct *tty)
798 {
799 struct acm *acm = container_of(port, struct acm, port);
800 int retval = -ENODEV;
801 int i;
802
803 dev_dbg(&acm->control->dev, "%s\n", __func__);
804
805 mutex_lock(&acm->mutex);
806 if (acm->disconnected)
807 goto disconnected;
808
809 retval = usb_autopm_get_interface(acm->control);
810 if (retval)
811 goto error_get_interface;
812
813 /*
814 * FIXME: Why do we need this? Allocating 64K of physically contiguous
815 * memory is really nasty...
816 */
817 set_bit(TTY_NO_WRITE_SPLIT, &tty->flags);
818 acm->control->needs_remote_wakeup = 1;
819 #ifdef CONFIG_MTK_DT_USB_SUPPORT
820 #ifdef CONFIG_PM_RUNTIME
821 acm->control->needs_remote_wakeup = 0;
822 #endif
823 #endif
824
825 acm->ctrlurb->dev = acm->dev;
826 retval = usb_submit_urb(acm->ctrlurb, GFP_KERNEL);
827 if (retval) {
828 dev_err(&acm->control->dev,
829 "%s - usb_submit_urb(ctrl irq) failed\n", __func__);
830 goto error_submit_urb;
831 }
832
833 acm->ctrlout = ACM_CTRL_DTR | ACM_CTRL_RTS;
834 retval = acm_set_control(acm, acm->ctrlout);
835 if (retval < 0 && (acm->ctrl_caps & USB_CDC_CAP_LINE))
836 goto error_set_control;
837
838 /*
839 * Unthrottle device in case the TTY was closed while throttled.
840 */
841 spin_lock_irq(&acm->read_lock);
842 acm->throttled = 0;
843 acm->throttle_req = 0;
844 spin_unlock_irq(&acm->read_lock);
845
846 retval = acm_submit_read_urbs(acm, GFP_KERNEL);
847 if (retval)
848 goto error_submit_read_urbs;
849
850 usb_autopm_put_interface(acm->control);
851
852 mutex_unlock(&acm->mutex);
853
854 return 0;
855
856 error_submit_read_urbs:
857 for (i = 0; i < acm->rx_buflimit; i++)
858 usb_kill_urb(acm->read_urbs[i]);
859 acm->ctrlout = 0;
860 acm_set_control(acm, acm->ctrlout);
861 error_set_control:
862 usb_kill_urb(acm->ctrlurb);
863 error_submit_urb:
864 usb_autopm_put_interface(acm->control);
865 error_get_interface:
866 disconnected:
867 mutex_unlock(&acm->mutex);
868
869 return usb_translate_errors(retval);
870 }
871
872 static void acm_port_destruct(struct tty_port *port)
873 {
874 struct acm *acm = container_of(port, struct acm, port);
875
876 dev_dbg(&acm->control->dev, "%s\n", __func__);
877
878 acm_release_minor(acm);
879 usb_put_intf(acm->control);
880 kfree(acm->country_codes);
881 kfree(acm);
882 }
883
884 static void acm_port_shutdown(struct tty_port *port)
885 {
886 struct acm *acm = container_of(port, struct acm, port);
887 struct urb *urb;
888 struct acm_wb *wb;
889 int i;
890 int pm_err;
891
892 dev_dbg(&acm->control->dev, "%s\n", __func__);
893
894 mutex_lock(&acm->mutex);
895 if (!acm->disconnected) {
896 pm_err = usb_autopm_get_interface(acm->control);
897 acm_set_control(acm, acm->ctrlout = 0);
898
899 for (;;) {
900 urb = usb_get_from_anchor(&acm->delayed);
901 if (!urb)
902 break;
903 wb = urb->context;
904 wb->use = 0;
905 usb_autopm_put_interface_async(acm->control);
906 }
907
908 usb_kill_urb(acm->ctrlurb);
909 for (i = 0; i < ACM_NW; i++)
910 usb_kill_urb(acm->wb[i].urb);
911 for (i = 0; i < acm->rx_buflimit; i++)
912 usb_kill_urb(acm->read_urbs[i]);
913 acm->control->needs_remote_wakeup = 0;
914 if (!pm_err)
915 usb_autopm_put_interface(acm->control);
916 }
917 mutex_unlock(&acm->mutex);
918 }
919
920 static void acm_tty_cleanup(struct tty_struct *tty)
921 {
922 struct acm *acm = tty->driver_data;
923 dev_dbg(&acm->control->dev, "%s\n", __func__);
924 tty_port_put(&acm->port);
925 }
926
927 static void acm_tty_hangup(struct tty_struct *tty)
928 {
929 struct acm *acm = tty->driver_data;
930 dev_dbg(&acm->control->dev, "%s\n", __func__);
931 tty_port_hangup(&acm->port);
932 }
933
934 static void acm_tty_close(struct tty_struct *tty, struct file *filp)
935 {
936 struct acm *acm = tty->driver_data;
937 dev_dbg(&acm->control->dev, "%s\n", __func__);
938 #ifdef CONFIG_MTK_DT_USB_SUPPORT
939 dbg_mtk(&acm->control->dev, "%s port_cnt=%d", __func__, acm->port.count);
940 if(!strcmp(MDDOWNLOADER_BIN_NAME, current->comm)){
941 record_enable = 0;
942 dump_record();
943 }
944 #endif
945 tty_port_close(&acm->port, tty, filp);
946 }
947
948 static int acm_tty_write(struct tty_struct *tty,
949 const unsigned char *buf, int count)
950 {
951 struct acm *acm = tty->driver_data;
952 int stat;
953 unsigned long flags;
954 int wbn;
955 struct acm_wb *wb;
956 #ifdef CONFIG_MTK_DT_USB_SUPPORT
957 int i, len;
958 #endif
959
960 if (!count)
961 return 0;
962
963 dev_vdbg(&acm->data->dev, "%s - count %d\n", __func__, count);
964
965 #ifdef CONFIG_MTK_DT_USB_SUPPORT
966 if(enable_dump) {
967 len = sprintf(data_out, "DT-O: ");
968 for(i=0; i<count && i<DATA_DUMP_BYTES; i++) {
969 len += sprintf(data_out+len, "%02X ", *(buf+i));
970 }
971 sprintf(data_out+len, "\n");
972 dbg_mtk(&acm->data->dev, "%s", data_out);
973 }
974 #endif
975 spin_lock_irqsave(&acm->write_lock, flags);
976 wbn = acm_wb_alloc(acm);
977 if (wbn < 0) {
978 spin_unlock_irqrestore(&acm->write_lock, flags);
979 return 0;
980 }
981 wb = &acm->wb[wbn];
982
983 count = (count > acm->writesize) ? acm->writesize : count;
984 dev_vdbg(&acm->data->dev, "%s - write %d\n", __func__, count);
985 memcpy(wb->buf, buf, count);
986 wb->len = count;
987 spin_unlock_irqrestore(&acm->write_lock, flags);
988
989 stat = acm_write_start(acm, wbn);
990 if (stat < 0)
991 return stat;
992 return count;
993 }
994
995 static int acm_tty_write_room(struct tty_struct *tty)
996 {
997 struct acm *acm = tty->driver_data;
998 /*
999 * Do not let the line discipline to know that we have a reserve,
1000 * or it might get too enthusiastic.
1001 */
1002 return acm_wb_is_avail(acm) ? acm->writesize : 0;
1003 }
1004
1005 static int acm_tty_chars_in_buffer(struct tty_struct *tty)
1006 {
1007 struct acm *acm = tty->driver_data;
1008 /*
1009 * if the device was unplugged then any remaining characters fell out
1010 * of the connector ;)
1011 */
1012 if (acm->disconnected)
1013 return 0;
1014 /*
1015 * This is inaccurate (overcounts), but it works.
1016 */
1017 return (ACM_NW - acm_wb_is_avail(acm)) * acm->writesize;
1018 }
1019
1020 static void acm_tty_throttle(struct tty_struct *tty)
1021 {
1022 struct acm *acm = tty->driver_data;
1023
1024 spin_lock_irq(&acm->read_lock);
1025 acm->throttle_req = 1;
1026 spin_unlock_irq(&acm->read_lock);
1027 }
1028
1029 static void acm_tty_unthrottle(struct tty_struct *tty)
1030 {
1031 struct acm *acm = tty->driver_data;
1032 unsigned int was_throttled;
1033
1034 spin_lock_irq(&acm->read_lock);
1035 was_throttled = acm->throttled;
1036 acm->throttled = 0;
1037 acm->throttle_req = 0;
1038 spin_unlock_irq(&acm->read_lock);
1039
1040 if (was_throttled)
1041 acm_submit_read_urbs(acm, GFP_KERNEL);
1042 }
1043
1044 static int acm_tty_break_ctl(struct tty_struct *tty, int state)
1045 {
1046 struct acm *acm = tty->driver_data;
1047 int retval;
1048
1049 retval = acm_send_break(acm, state ? 0xffff : 0);
1050 if (retval < 0)
1051 dev_dbg(&acm->control->dev, "%s - send break failed\n",
1052 __func__);
1053 return retval;
1054 }
1055
1056 static int acm_tty_tiocmget(struct tty_struct *tty)
1057 {
1058 struct acm *acm = tty->driver_data;
1059
1060 #ifdef CONFIG_MTK_DT_USB_SUPPORT
1061 if(enable_dump) {
1062 dbg_mtk(&acm->control->dev, "tiocmget ctrlin=%x\n", acm->ctrlin);
1063 }
1064 #endif
1065 return (acm->ctrlout & ACM_CTRL_DTR ? TIOCM_DTR : 0) |
1066 (acm->ctrlout & ACM_CTRL_RTS ? TIOCM_RTS : 0) |
1067 (acm->ctrlin & ACM_CTRL_DSR ? TIOCM_DSR : 0) |
1068 (acm->ctrlin & ACM_CTRL_RI ? TIOCM_RI : 0) |
1069 (acm->ctrlin & ACM_CTRL_DCD ? TIOCM_CD : 0) |
1070 TIOCM_CTS;
1071 }
1072
1073 static int acm_tty_tiocmset(struct tty_struct *tty,
1074 unsigned int set, unsigned int clear)
1075 {
1076 struct acm *acm = tty->driver_data;
1077 unsigned int newctrl;
1078
1079 #ifdef CONFIG_MTK_DT_USB_SUPPORT
1080 if(enable_dump) {
1081 dbg_mtk(&acm->control->dev, "tiocmset ctrlout=%x\n", acm->ctrlout);
1082 }
1083 #endif
1084 newctrl = acm->ctrlout;
1085 set = (set & TIOCM_DTR ? ACM_CTRL_DTR : 0) |
1086 (set & TIOCM_RTS ? ACM_CTRL_RTS : 0);
1087 clear = (clear & TIOCM_DTR ? ACM_CTRL_DTR : 0) |
1088 (clear & TIOCM_RTS ? ACM_CTRL_RTS : 0);
1089
1090 newctrl = (newctrl & ~clear) | set;
1091
1092 if (acm->ctrlout == newctrl)
1093 return 0;
1094 return acm_set_control(acm, acm->ctrlout = newctrl);
1095 }
1096
1097 static int get_serial_info(struct acm *acm, struct serial_struct __user *info)
1098 {
1099 struct serial_struct tmp;
1100
1101 if (!info)
1102 return -EINVAL;
1103
1104 memset(&tmp, 0, sizeof(tmp));
1105 tmp.flags = ASYNC_LOW_LATENCY;
1106 tmp.xmit_fifo_size = acm->writesize;
1107 tmp.baud_base = le32_to_cpu(acm->line.dwDTERate);
1108 tmp.close_delay = acm->port.close_delay / 10;
1109 tmp.closing_wait = acm->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ?
1110 ASYNC_CLOSING_WAIT_NONE :
1111 acm->port.closing_wait / 10;
1112
1113 if (copy_to_user(info, &tmp, sizeof(tmp)))
1114 return -EFAULT;
1115 else
1116 return 0;
1117 }
1118
1119 static int set_serial_info(struct acm *acm,
1120 struct serial_struct __user *newinfo)
1121 {
1122 struct serial_struct new_serial;
1123 unsigned int closing_wait, close_delay;
1124 int retval = 0;
1125
1126 if (copy_from_user(&new_serial, newinfo, sizeof(new_serial)))
1127 return -EFAULT;
1128
1129 close_delay = new_serial.close_delay * 10;
1130 closing_wait = new_serial.closing_wait == ASYNC_CLOSING_WAIT_NONE ?
1131 ASYNC_CLOSING_WAIT_NONE : new_serial.closing_wait * 10;
1132
1133 mutex_lock(&acm->port.mutex);
1134
1135 if (!capable(CAP_SYS_ADMIN)) {
1136 if ((close_delay != acm->port.close_delay) ||
1137 (closing_wait != acm->port.closing_wait))
1138 retval = -EPERM;
1139 else
1140 retval = -EOPNOTSUPP;
1141 } else {
1142 acm->port.close_delay = close_delay;
1143 acm->port.closing_wait = closing_wait;
1144 }
1145
1146 mutex_unlock(&acm->port.mutex);
1147 return retval;
1148 }
1149
1150 static int acm_tty_ioctl(struct tty_struct *tty,
1151 unsigned int cmd, unsigned long arg)
1152 {
1153 struct acm *acm = tty->driver_data;
1154 int rv = -ENOIOCTLCMD;
1155
1156 switch (cmd) {
1157 case TIOCGSERIAL: /* gets serial port data */
1158 rv = get_serial_info(acm, (struct serial_struct __user *) arg);
1159 break;
1160 case TIOCSSERIAL:
1161 rv = set_serial_info(acm, (struct serial_struct __user *) arg);
1162 break;
1163 }
1164
1165 return rv;
1166 }
1167
1168 static void acm_tty_set_termios(struct tty_struct *tty,
1169 struct ktermios *termios_old)
1170 {
1171 struct acm *acm = tty->driver_data;
1172 struct ktermios *termios = &tty->termios;
1173 struct usb_cdc_line_coding newline;
1174 int newctrl = acm->ctrlout;
1175
1176 newline.dwDTERate = cpu_to_le32(tty_get_baud_rate(tty));
1177 newline.bCharFormat = termios->c_cflag & CSTOPB ? 2 : 0;
1178 newline.bParityType = termios->c_cflag & PARENB ?
1179 (termios->c_cflag & PARODD ? 1 : 2) +
1180 (termios->c_cflag & CMSPAR ? 2 : 0) : 0;
1181 switch (termios->c_cflag & CSIZE) {
1182 case CS5:
1183 newline.bDataBits = 5;
1184 break;
1185 case CS6:
1186 newline.bDataBits = 6;
1187 break;
1188 case CS7:
1189 newline.bDataBits = 7;
1190 break;
1191 case CS8:
1192 default:
1193 newline.bDataBits = 8;
1194 break;
1195 }
1196 /* FIXME: Needs to clear unsupported bits in the termios */
1197 acm->clocal = ((termios->c_cflag & CLOCAL) != 0);
1198
1199 if (C_BAUD(tty) == B0) {
1200 newline.dwDTERate = acm->line.dwDTERate;
1201 newctrl &= ~ACM_CTRL_DTR;
1202 } else if (termios_old && (termios_old->c_cflag & CBAUD) == B0) {
1203 newctrl |= ACM_CTRL_DTR;
1204 }
1205
1206 if (newctrl != acm->ctrlout)
1207 acm_set_control(acm, acm->ctrlout = newctrl);
1208
1209 if (memcmp(&acm->line, &newline, sizeof newline)) {
1210 memcpy(&acm->line, &newline, sizeof newline);
1211 dev_dbg(&acm->control->dev, "%s - set line: %d %d %d %d\n",
1212 __func__,
1213 le32_to_cpu(newline.dwDTERate),
1214 newline.bCharFormat, newline.bParityType,
1215 newline.bDataBits);
1216 acm_set_line(acm, &acm->line);
1217 }
1218 }
1219
1220 static const struct tty_port_operations acm_port_ops = {
1221 .shutdown = acm_port_shutdown,
1222 .activate = acm_port_activate,
1223 .destruct = acm_port_destruct,
1224 };
1225
1226 /*
1227 * USB probe and disconnect routines.
1228 */
1229
1230 /* Little helpers: write/read buffers free */
1231 static void acm_write_buffers_free(struct acm *acm)
1232 {
1233 int i;
1234 struct acm_wb *wb;
1235 struct usb_device *usb_dev = interface_to_usbdev(acm->control);
1236
1237 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++)
1238 usb_free_coherent(usb_dev, acm->writesize, wb->buf, wb->dmah);
1239 }
1240
1241 static void acm_read_buffers_free(struct acm *acm)
1242 {
1243 struct usb_device *usb_dev = interface_to_usbdev(acm->control);
1244 int i;
1245
1246 for (i = 0; i < acm->rx_buflimit; i++)
1247 usb_free_coherent(usb_dev, acm->readsize,
1248 acm->read_buffers[i].base, acm->read_buffers[i].dma);
1249 }
1250
1251 /* Little helper: write buffers allocate */
1252 static int acm_write_buffers_alloc(struct acm *acm)
1253 {
1254 int i;
1255 struct acm_wb *wb;
1256
1257 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) {
1258 wb->buf = usb_alloc_coherent(acm->dev, acm->writesize, GFP_KERNEL,
1259 &wb->dmah);
1260 if (!wb->buf) {
1261 while (i != 0) {
1262 --i;
1263 --wb;
1264 usb_free_coherent(acm->dev, acm->writesize,
1265 wb->buf, wb->dmah);
1266 }
1267 return -ENOMEM;
1268 }
1269 }
1270 return 0;
1271 }
1272
1273 static int acm_probe(struct usb_interface *intf,
1274 const struct usb_device_id *id)
1275 {
1276 struct usb_cdc_union_desc *union_header = NULL;
1277 struct usb_cdc_country_functional_desc *cfd = NULL;
1278 unsigned char *buffer = intf->altsetting->extra;
1279 int buflen = intf->altsetting->extralen;
1280 struct usb_interface *control_interface;
1281 struct usb_interface *data_interface;
1282 struct usb_endpoint_descriptor *epctrl = NULL;
1283 struct usb_endpoint_descriptor *epread = NULL;
1284 struct usb_endpoint_descriptor *epwrite = NULL;
1285 struct usb_device *usb_dev = interface_to_usbdev(intf);
1286 struct acm *acm;
1287 int minor;
1288 int ctrlsize, readsize;
1289 u8 *buf;
1290 u8 ac_management_function = 0;
1291 u8 call_management_function = 0;
1292 int call_interface_num = -1;
1293 int data_interface_num = -1;
1294 unsigned long quirks;
1295 int num_rx_buf;
1296 int i;
1297 int combined_interfaces = 0;
1298 struct device *tty_dev;
1299 int rv = -ENOMEM;
1300
1301 /* normal quirks */
1302 quirks = (unsigned long)id->driver_info;
1303
1304 if (quirks == IGNORE_DEVICE)
1305 return -ENODEV;
1306
1307 num_rx_buf = (quirks == SINGLE_RX_URB) ? 1 : ACM_NR;
1308
1309 /* handle quirks deadly to normal probing*/
1310 if (quirks == NO_UNION_NORMAL) {
1311 data_interface = usb_ifnum_to_if(usb_dev, 1);
1312 control_interface = usb_ifnum_to_if(usb_dev, 0);
1313 /* we would crash */
1314 if (!data_interface || !control_interface)
1315 return -ENODEV;
1316 goto skip_normal_probe;
1317 }
1318
1319 /* normal probing*/
1320 if (!buffer) {
1321 dev_err(&intf->dev, "Weird descriptor references\n");
1322 return -EINVAL;
1323 }
1324
1325 if (!buflen) {
1326 if (intf->cur_altsetting->endpoint &&
1327 intf->cur_altsetting->endpoint->extralen &&
1328 intf->cur_altsetting->endpoint->extra) {
1329 dev_dbg(&intf->dev,
1330 "Seeking extra descriptors on endpoint\n");
1331 buflen = intf->cur_altsetting->endpoint->extralen;
1332 buffer = intf->cur_altsetting->endpoint->extra;
1333 } else {
1334 dev_err(&intf->dev,
1335 "Zero length descriptor references\n");
1336 return -EINVAL;
1337 }
1338 }
1339
1340 while (buflen > 0) {
1341 if (buffer[1] != USB_DT_CS_INTERFACE) {
1342 dev_err(&intf->dev, "skipping garbage\n");
1343 goto next_desc;
1344 }
1345
1346 switch (buffer[2]) {
1347 case USB_CDC_UNION_TYPE: /* we've found it */
1348 if (union_header) {
1349 dev_err(&intf->dev, "More than one "
1350 "union descriptor, skipping ...\n");
1351 goto next_desc;
1352 }
1353 union_header = (struct usb_cdc_union_desc *)buffer;
1354 break;
1355 case USB_CDC_COUNTRY_TYPE: /* export through sysfs*/
1356 cfd = (struct usb_cdc_country_functional_desc *)buffer;
1357 break;
1358 case USB_CDC_HEADER_TYPE: /* maybe check version */
1359 break; /* for now we ignore it */
1360 case USB_CDC_ACM_TYPE:
1361 ac_management_function = buffer[3];
1362 break;
1363 case USB_CDC_CALL_MANAGEMENT_TYPE:
1364 call_management_function = buffer[3];
1365 call_interface_num = buffer[4];
1366 if ((quirks & NOT_A_MODEM) == 0 && (call_management_function & 3) != 3)
1367 dev_err(&intf->dev, "This device cannot do calls on its own. It is not a modem.\n");
1368 break;
1369 default:
1370 /* there are LOTS more CDC descriptors that
1371 * could legitimately be found here.
1372 */
1373 dev_dbg(&intf->dev, "Ignoring descriptor: "
1374 "type %02x, length %d\n",
1375 buffer[2], buffer[0]);
1376 break;
1377 }
1378 next_desc:
1379 buflen -= buffer[0];
1380 buffer += buffer[0];
1381 }
1382
1383 if (!union_header) {
1384 if (call_interface_num > 0) {
1385 dev_dbg(&intf->dev, "No union descriptor, using call management descriptor\n");
1386 /* quirks for Droids MuIn LCD */
1387 if (quirks & NO_DATA_INTERFACE)
1388 data_interface = usb_ifnum_to_if(usb_dev, 0);
1389 else
1390 data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = call_interface_num));
1391 control_interface = intf;
1392 } else {
1393 if (intf->cur_altsetting->desc.bNumEndpoints != 3) {
1394 dev_dbg(&intf->dev,"No union descriptor, giving up\n");
1395 return -ENODEV;
1396 } else {
1397 dev_warn(&intf->dev,"No union descriptor, testing for castrated device\n");
1398 combined_interfaces = 1;
1399 control_interface = data_interface = intf;
1400 goto look_for_collapsed_interface;
1401 }
1402 }
1403 } else {
1404 control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0);
1405 data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = union_header->bSlaveInterface0));
1406 }
1407
1408 if (!control_interface || !data_interface) {
1409 dev_dbg(&intf->dev, "no interfaces\n");
1410 return -ENODEV;
1411 }
1412
1413 if (data_interface_num != call_interface_num)
1414 dev_dbg(&intf->dev, "Separate call control interface. That is not fully supported.\n");
1415
1416 if (control_interface == data_interface) {
1417 /* some broken devices designed for windows work this way */
1418 dev_warn(&intf->dev,"Control and data interfaces are not separated!\n");
1419 combined_interfaces = 1;
1420 /* a popular other OS doesn't use it */
1421 quirks |= NO_CAP_LINE;
1422 if (data_interface->cur_altsetting->desc.bNumEndpoints != 3) {
1423 dev_err(&intf->dev, "This needs exactly 3 endpoints\n");
1424 return -EINVAL;
1425 }
1426 look_for_collapsed_interface:
1427 for (i = 0; i < 3; i++) {
1428 struct usb_endpoint_descriptor *ep;
1429 ep = &data_interface->cur_altsetting->endpoint[i].desc;
1430
1431 if (usb_endpoint_is_int_in(ep))
1432 epctrl = ep;
1433 else if (usb_endpoint_is_bulk_out(ep))
1434 epwrite = ep;
1435 else if (usb_endpoint_is_bulk_in(ep))
1436 epread = ep;
1437 else
1438 return -EINVAL;
1439 }
1440 if (!epctrl || !epread || !epwrite)
1441 return -ENODEV;
1442 else
1443 goto made_compressed_probe;
1444 }
1445
1446 skip_normal_probe:
1447
1448 /*workaround for switched interfaces */
1449 if (data_interface->cur_altsetting->desc.bInterfaceClass
1450 != CDC_DATA_INTERFACE_TYPE) {
1451 if (control_interface->cur_altsetting->desc.bInterfaceClass
1452 == CDC_DATA_INTERFACE_TYPE) {
1453 struct usb_interface *t;
1454 dev_dbg(&intf->dev,
1455 "Your device has switched interfaces.\n");
1456 t = control_interface;
1457 control_interface = data_interface;
1458 data_interface = t;
1459 } else {
1460 return -EINVAL;
1461 }
1462 }
1463
1464 /* Accept probe requests only for the control interface */
1465 if (!combined_interfaces && intf != control_interface)
1466 return -ENODEV;
1467
1468 if (!combined_interfaces && usb_interface_claimed(data_interface)) {
1469 /* valid in this context */
1470 dev_dbg(&intf->dev, "The data interface isn't available\n");
1471 return -EBUSY;
1472 }
1473
1474
1475 if (data_interface->cur_altsetting->desc.bNumEndpoints < 2 ||
1476 control_interface->cur_altsetting->desc.bNumEndpoints == 0)
1477 return -EINVAL;
1478
1479 epctrl = &control_interface->cur_altsetting->endpoint[0].desc;
1480 epread = &data_interface->cur_altsetting->endpoint[0].desc;
1481 epwrite = &data_interface->cur_altsetting->endpoint[1].desc;
1482
1483
1484 /* workaround for switched endpoints */
1485 if (!usb_endpoint_dir_in(epread)) {
1486 /* descriptors are swapped */
1487 struct usb_endpoint_descriptor *t;
1488 dev_dbg(&intf->dev,
1489 "The data interface has switched endpoints\n");
1490 t = epread;
1491 epread = epwrite;
1492 epwrite = t;
1493 }
1494 made_compressed_probe:
1495 dev_dbg(&intf->dev, "interfaces are valid\n");
1496
1497 acm = kzalloc(sizeof(struct acm), GFP_KERNEL);
1498 if (acm == NULL) {
1499 dev_err(&intf->dev, "out of memory (acm kzalloc)\n");
1500 goto alloc_fail;
1501 }
1502
1503 minor = acm_alloc_minor(acm);
1504 if (minor == ACM_TTY_MINORS) {
1505 dev_err(&intf->dev, "no more free acm devices\n");
1506 kfree(acm);
1507 return -ENODEV;
1508 }
1509
1510 ctrlsize = usb_endpoint_maxp(epctrl);
1511 readsize = usb_endpoint_maxp(epread) *
1512 (quirks == SINGLE_RX_URB ? 1 : 2);
1513 acm->combined_interfaces = combined_interfaces;
1514 #ifdef CONFIG_MTK_DT_USB_SUPPORT
1515 acm->writesize = ACM_WB_SZ;
1516 #else
1517 acm->writesize = usb_endpoint_maxp(epwrite) * 20;
1518 #endif
1519 acm->control = control_interface;
1520 acm->data = data_interface;
1521 acm->minor = minor;
1522 acm->dev = usb_dev;
1523 acm->ctrl_caps = ac_management_function;
1524 if (quirks & NO_CAP_LINE)
1525 acm->ctrl_caps &= ~USB_CDC_CAP_LINE;
1526 acm->ctrlsize = ctrlsize;
1527 acm->readsize = readsize;
1528 acm->rx_buflimit = num_rx_buf;
1529 INIT_WORK(&acm->work, acm_softint);
1530 spin_lock_init(&acm->write_lock);
1531 spin_lock_init(&acm->read_lock);
1532 mutex_init(&acm->mutex);
1533 acm->is_int_ep = usb_endpoint_xfer_int(epread);
1534 if (acm->is_int_ep)
1535 acm->bInterval = epread->bInterval;
1536 tty_port_init(&acm->port);
1537 acm->port.ops = &acm_port_ops;
1538 init_usb_anchor(&acm->delayed);
1539
1540 buf = usb_alloc_coherent(usb_dev, ctrlsize, GFP_KERNEL, &acm->ctrl_dma);
1541 if (!buf) {
1542 dev_err(&intf->dev, "out of memory (ctrl buffer alloc)\n");
1543 goto alloc_fail2;
1544 }
1545 acm->ctrl_buffer = buf;
1546
1547 if (acm_write_buffers_alloc(acm) < 0) {
1548 dev_err(&intf->dev, "out of memory (write buffer alloc)\n");
1549 goto alloc_fail4;
1550 }
1551
1552 acm->ctrlurb = usb_alloc_urb(0, GFP_KERNEL);
1553 if (!acm->ctrlurb) {
1554 dev_err(&intf->dev, "out of memory (ctrlurb kmalloc)\n");
1555 goto alloc_fail5;
1556 }
1557 for (i = 0; i < num_rx_buf; i++) {
1558 struct acm_rb *rb = &(acm->read_buffers[i]);
1559 struct urb *urb;
1560
1561 rb->base = usb_alloc_coherent(acm->dev, readsize, GFP_KERNEL,
1562 &rb->dma);
1563 if (!rb->base) {
1564 dev_err(&intf->dev, "out of memory "
1565 "(read bufs usb_alloc_coherent)\n");
1566 goto alloc_fail6;
1567 }
1568 rb->index = i;
1569 rb->instance = acm;
1570
1571 urb = usb_alloc_urb(0, GFP_KERNEL);
1572 if (!urb) {
1573 dev_err(&intf->dev,
1574 "out of memory (read urbs usb_alloc_urb)\n");
1575 goto alloc_fail6;
1576 }
1577 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1578 urb->transfer_dma = rb->dma;
1579 if (acm->is_int_ep) {
1580 usb_fill_int_urb(urb, acm->dev,
1581 usb_rcvintpipe(usb_dev, epread->bEndpointAddress),
1582 rb->base,
1583 acm->readsize,
1584 acm_read_bulk_callback, rb,
1585 acm->bInterval);
1586 } else {
1587 usb_fill_bulk_urb(urb, acm->dev,
1588 usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress),
1589 rb->base,
1590 acm->readsize,
1591 acm_read_bulk_callback, rb);
1592 }
1593
1594 acm->read_urbs[i] = urb;
1595 __set_bit(i, &acm->read_urbs_free);
1596 }
1597 for (i = 0; i < ACM_NW; i++) {
1598 struct acm_wb *snd = &(acm->wb[i]);
1599
1600 snd->urb = usb_alloc_urb(0, GFP_KERNEL);
1601 if (snd->urb == NULL) {
1602 dev_err(&intf->dev,
1603 "out of memory (write urbs usb_alloc_urb)\n");
1604 goto alloc_fail7;
1605 }
1606
1607 if (usb_endpoint_xfer_int(epwrite))
1608 usb_fill_int_urb(snd->urb, usb_dev,
1609 usb_sndintpipe(usb_dev, epwrite->bEndpointAddress),
1610 NULL, acm->writesize, acm_write_bulk, snd, epwrite->bInterval);
1611 else
1612 usb_fill_bulk_urb(snd->urb, usb_dev,
1613 usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress),
1614 NULL, acm->writesize, acm_write_bulk, snd);
1615 snd->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1616 snd->instance = acm;
1617 }
1618
1619 usb_set_intfdata(intf, acm);
1620
1621 i = device_create_file(&intf->dev, &dev_attr_bmCapabilities);
1622 if (i < 0)
1623 goto alloc_fail7;
1624
1625 if (cfd) { /* export the country data */
1626 acm->country_codes = kmalloc(cfd->bLength - 4, GFP_KERNEL);
1627 if (!acm->country_codes)
1628 goto skip_countries;
1629 acm->country_code_size = cfd->bLength - 4;
1630 memcpy(acm->country_codes, (u8 *)&cfd->wCountyCode0,
1631 cfd->bLength - 4);
1632 acm->country_rel_date = cfd->iCountryCodeRelDate;
1633
1634 i = device_create_file(&intf->dev, &dev_attr_wCountryCodes);
1635 if (i < 0) {
1636 kfree(acm->country_codes);
1637 acm->country_codes = NULL;
1638 acm->country_code_size = 0;
1639 goto skip_countries;
1640 }
1641
1642 i = device_create_file(&intf->dev,
1643 &dev_attr_iCountryCodeRelDate);
1644 if (i < 0) {
1645 device_remove_file(&intf->dev, &dev_attr_wCountryCodes);
1646 kfree(acm->country_codes);
1647 acm->country_codes = NULL;
1648 acm->country_code_size = 0;
1649 goto skip_countries;
1650 }
1651 }
1652
1653 skip_countries:
1654 usb_fill_int_urb(acm->ctrlurb, usb_dev,
1655 usb_rcvintpipe(usb_dev, epctrl->bEndpointAddress),
1656 acm->ctrl_buffer, ctrlsize, acm_ctrl_irq, acm,
1657 /* works around buggy devices */
1658 epctrl->bInterval ? epctrl->bInterval : 0xff);
1659 acm->ctrlurb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1660 acm->ctrlurb->transfer_dma = acm->ctrl_dma;
1661
1662 dev_info(&intf->dev, "ttyACM%d: USB ACM device\n", minor);
1663
1664 acm_set_control(acm, acm->ctrlout);
1665
1666 acm->line.dwDTERate = cpu_to_le32(9600);
1667 acm->line.bDataBits = 8;
1668 acm_set_line(acm, &acm->line);
1669
1670 usb_driver_claim_interface(&acm_driver, data_interface, acm);
1671 usb_set_intfdata(data_interface, acm);
1672
1673 usb_get_intf(control_interface);
1674 tty_dev = tty_port_register_device(&acm->port, acm_tty_driver, minor,
1675 &control_interface->dev);
1676 if (IS_ERR(tty_dev)) {
1677 rv = PTR_ERR(tty_dev);
1678 goto alloc_fail8;
1679 }
1680
1681 return 0;
1682 alloc_fail8:
1683 if (acm->country_codes) {
1684 device_remove_file(&acm->control->dev,
1685 &dev_attr_wCountryCodes);
1686 device_remove_file(&acm->control->dev,
1687 &dev_attr_iCountryCodeRelDate);
1688 kfree(acm->country_codes);
1689 }
1690 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities);
1691 alloc_fail7:
1692 usb_set_intfdata(intf, NULL);
1693 for (i = 0; i < ACM_NW; i++)
1694 usb_free_urb(acm->wb[i].urb);
1695 alloc_fail6:
1696 for (i = 0; i < num_rx_buf; i++)
1697 usb_free_urb(acm->read_urbs[i]);
1698 acm_read_buffers_free(acm);
1699 usb_free_urb(acm->ctrlurb);
1700 alloc_fail5:
1701 acm_write_buffers_free(acm);
1702 alloc_fail4:
1703 usb_free_coherent(usb_dev, ctrlsize, acm->ctrl_buffer, acm->ctrl_dma);
1704 alloc_fail2:
1705 acm_release_minor(acm);
1706 kfree(acm);
1707 alloc_fail:
1708 return rv;
1709 }
1710
1711 static void stop_data_traffic(struct acm *acm)
1712 {
1713 int i;
1714
1715 dev_dbg(&acm->control->dev, "%s\n", __func__);
1716
1717 usb_kill_urb(acm->ctrlurb);
1718 for (i = 0; i < ACM_NW; i++)
1719 usb_kill_urb(acm->wb[i].urb);
1720 for (i = 0; i < acm->rx_buflimit; i++)
1721 usb_kill_urb(acm->read_urbs[i]);
1722
1723 cancel_work_sync(&acm->work);
1724 }
1725
1726 static void acm_disconnect(struct usb_interface *intf)
1727 {
1728 struct acm *acm = usb_get_intfdata(intf);
1729 struct usb_device *usb_dev = interface_to_usbdev(intf);
1730 struct tty_struct *tty;
1731 int i;
1732
1733 dev_dbg(&intf->dev, "%s\n", __func__);
1734
1735 /* sibling interface is already cleaning up */
1736 if (!acm)
1737 return;
1738
1739 mutex_lock(&acm->mutex);
1740 acm->disconnected = true;
1741 if (acm->country_codes) {
1742 device_remove_file(&acm->control->dev,
1743 &dev_attr_wCountryCodes);
1744 device_remove_file(&acm->control->dev,
1745 &dev_attr_iCountryCodeRelDate);
1746 }
1747 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities);
1748 usb_set_intfdata(acm->control, NULL);
1749 usb_set_intfdata(acm->data, NULL);
1750 mutex_unlock(&acm->mutex);
1751
1752 tty = tty_port_tty_get(&acm->port);
1753 if (tty) {
1754 tty_vhangup(tty);
1755 tty_kref_put(tty);
1756 }
1757
1758 stop_data_traffic(acm);
1759
1760 tty_unregister_device(acm_tty_driver, acm->minor);
1761
1762 usb_free_urb(acm->ctrlurb);
1763 for (i = 0; i < ACM_NW; i++)
1764 usb_free_urb(acm->wb[i].urb);
1765 for (i = 0; i < acm->rx_buflimit; i++)
1766 usb_free_urb(acm->read_urbs[i]);
1767 acm_write_buffers_free(acm);
1768 usb_free_coherent(usb_dev, acm->ctrlsize, acm->ctrl_buffer, acm->ctrl_dma);
1769 acm_read_buffers_free(acm);
1770
1771 if (!acm->combined_interfaces)
1772 usb_driver_release_interface(&acm_driver, intf == acm->control ?
1773 acm->data : acm->control);
1774
1775 tty_port_put(&acm->port);
1776 }
1777
1778 #ifdef CONFIG_PM
1779 static int acm_suspend(struct usb_interface *intf, pm_message_t message)
1780 {
1781 struct acm *acm = usb_get_intfdata(intf);
1782 int cnt;
1783
1784 dbg_mtk(&acm->control->dev, "%s intf=%d", __func__, intf->cur_altsetting->desc.bInterfaceNumber);
1785 spin_lock_irq(&acm->read_lock);
1786 spin_lock(&acm->write_lock);
1787 if (PMSG_IS_AUTO(message)) {
1788 if (acm->transmitting) {
1789 spin_unlock(&acm->write_lock);
1790 spin_unlock_irq(&acm->read_lock);
1791 return -EBUSY;
1792 }
1793 }else{
1794 int i;
1795 for (i = 0; i < ACM_NW; i++){
1796 if(acm->wb[i].use){
1797 spin_unlock(&acm->write_lock);
1798 spin_unlock_irq(&acm->read_lock);
1799 return -EBUSY;
1800 }
1801 }
1802 }
1803
1804 cnt = acm->susp_count++;
1805 spin_unlock(&acm->write_lock);
1806 spin_unlock_irq(&acm->read_lock);
1807
1808 if (cnt)
1809 return 0;
1810
1811 stop_data_traffic(acm);
1812
1813 return 0;
1814 }
1815
1816 static int acm_resume(struct usb_interface *intf)
1817 {
1818 struct acm *acm = usb_get_intfdata(intf);
1819 struct urb *urb;
1820 int rv = 0;
1821
1822 dbg_mtk(&acm->control->dev, "%s intf=%d", __func__, intf->cur_altsetting->desc.bInterfaceNumber);
1823
1824 spin_lock_irq(&acm->read_lock);
1825 spin_lock(&acm->write_lock);
1826
1827 if (--acm->susp_count)
1828 goto out;
1829
1830 if (test_bit(ASYNCB_INITIALIZED, &acm->port.flags)) {
1831 rv = usb_submit_urb(acm->ctrlurb, GFP_ATOMIC);
1832
1833 for (;;) {
1834 urb = usb_get_from_anchor(&acm->delayed);
1835 if (!urb)
1836 break;
1837
1838 acm_start_wb(acm, urb->context);
1839 }
1840
1841 /*
1842 * delayed error checking because we must
1843 * do the write path at all cost
1844 */
1845 if (rv < 0){
1846 MYDBG("urb fail:%d\n", rv);
1847 goto out;
1848 }
1849
1850 rv = acm_submit_read_urbs(acm, GFP_ATOMIC);
1851 }
1852 out:
1853 spin_unlock(&acm->write_lock);
1854 spin_unlock_irq(&acm->read_lock);
1855
1856 return rv;
1857 }
1858
1859 static int acm_reset_resume(struct usb_interface *intf)
1860 {
1861 struct acm *acm = usb_get_intfdata(intf);
1862
1863 if (test_bit(ASYNCB_INITIALIZED, &acm->port.flags))
1864 tty_port_tty_hangup(&acm->port, false);
1865
1866 return acm_resume(intf);
1867 }
1868
1869 #endif /* CONFIG_PM */
1870
1871 #define NOKIA_PCSUITE_ACM_INFO(x) \
1872 USB_DEVICE_AND_INTERFACE_INFO(0x0421, x, \
1873 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \
1874 USB_CDC_ACM_PROTO_VENDOR)
1875
1876 #define SAMSUNG_PCSUITE_ACM_INFO(x) \
1877 USB_DEVICE_AND_INTERFACE_INFO(0x04e7, x, \
1878 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \
1879 USB_CDC_ACM_PROTO_VENDOR)
1880
1881 /*
1882 * USB driver structure.
1883 */
1884
1885 static const struct usb_device_id acm_ids[] = {
1886 /* quirky and broken devices */
1887 { USB_DEVICE(0x17ef, 0x7000), /* Lenovo USB modem */
1888 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */
1889 { USB_DEVICE(0x0870, 0x0001), /* Metricom GS Modem */
1890 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1891 },
1892 { USB_DEVICE(0x0e8d, 0x0003), /* FIREFLY, MediaTek Inc; andrey.arapov@gmail.com */
1893 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1894 },
1895 { USB_DEVICE(0x0e8d, 0x3329), /* MediaTek Inc GPS */
1896 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1897 },
1898 { USB_DEVICE(0x0482, 0x0203), /* KYOCERA AH-K3001V */
1899 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1900 },
1901 { USB_DEVICE(0x079b, 0x000f), /* BT On-Air USB MODEM */
1902 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1903 },
1904 { USB_DEVICE(0x0ace, 0x1602), /* ZyDAS 56K USB MODEM */
1905 .driver_info = SINGLE_RX_URB,
1906 },
1907 { USB_DEVICE(0x0ace, 0x1608), /* ZyDAS 56K USB MODEM */
1908 .driver_info = SINGLE_RX_URB, /* firmware bug */
1909 },
1910 { USB_DEVICE(0x0ace, 0x1611), /* ZyDAS 56K USB MODEM - new version */
1911 .driver_info = SINGLE_RX_URB, /* firmware bug */
1912 },
1913 { USB_DEVICE(0x22b8, 0x7000), /* Motorola Q Phone */
1914 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1915 },
1916 { USB_DEVICE(0x0803, 0x3095), /* Zoom Telephonics Model 3095F USB MODEM */
1917 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1918 },
1919 { USB_DEVICE(0x0572, 0x1321), /* Conexant USB MODEM CX93010 */
1920 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1921 },
1922 { USB_DEVICE(0x0572, 0x1324), /* Conexant USB MODEM RD02-D400 */
1923 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1924 },
1925 { USB_DEVICE(0x0572, 0x1328), /* Shiro / Aztech USB MODEM UM-3100 */
1926 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */
1927 },
1928 { USB_DEVICE(0x2184, 0x001c) }, /* GW Instek AFG-2225 */
1929 { USB_DEVICE(0x22b8, 0x6425), /* Motorola MOTOMAGX phones */
1930 },
1931 /* Motorola H24 HSPA module: */
1932 { USB_DEVICE(0x22b8, 0x2d91) }, /* modem */
1933 { USB_DEVICE(0x22b8, 0x2d92), /* modem + diagnostics */
1934 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1935 },
1936 { USB_DEVICE(0x22b8, 0x2d93), /* modem + AT port */
1937 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1938 },
1939 { USB_DEVICE(0x22b8, 0x2d95), /* modem + AT port + diagnostics */
1940 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1941 },
1942 { USB_DEVICE(0x22b8, 0x2d96), /* modem + NMEA */
1943 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1944 },
1945 { USB_DEVICE(0x22b8, 0x2d97), /* modem + diagnostics + NMEA */
1946 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1947 },
1948 { USB_DEVICE(0x22b8, 0x2d99), /* modem + AT port + NMEA */
1949 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1950 },
1951 { USB_DEVICE(0x22b8, 0x2d9a), /* modem + AT port + diagnostics + NMEA */
1952 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */
1953 },
1954
1955 { USB_DEVICE(0x0572, 0x1329), /* Hummingbird huc56s (Conexant) */
1956 .driver_info = NO_UNION_NORMAL, /* union descriptor misplaced on
1957 data interface instead of
1958 communications interface.
1959 Maybe we should define a new
1960 quirk for this. */
1961 },
1962 { USB_DEVICE(0x0572, 0x1340), /* Conexant CX93010-2x UCMxx */
1963 .driver_info = NO_UNION_NORMAL,
1964 },
1965 { USB_DEVICE(0x05f9, 0x4002), /* PSC Scanning, Magellan 800i */
1966 .driver_info = NO_UNION_NORMAL,
1967 },
1968 { USB_DEVICE(0x1bbb, 0x0003), /* Alcatel OT-I650 */
1969 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */
1970 },
1971 { USB_DEVICE(0x1576, 0x03b1), /* Maretron USB100 */
1972 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */
1973 },
1974
1975 /* Nokia S60 phones expose two ACM channels. The first is
1976 * a modem and is picked up by the standard AT-command
1977 * information below. The second is 'vendor-specific' but
1978 * is treated as a serial device at the S60 end, so we want
1979 * to expose it on Linux too. */
1980 { NOKIA_PCSUITE_ACM_INFO(0x042D), }, /* Nokia 3250 */
1981 { NOKIA_PCSUITE_ACM_INFO(0x04D8), }, /* Nokia 5500 Sport */
1982 { NOKIA_PCSUITE_ACM_INFO(0x04C9), }, /* Nokia E50 */
1983 { NOKIA_PCSUITE_ACM_INFO(0x0419), }, /* Nokia E60 */
1984 { NOKIA_PCSUITE_ACM_INFO(0x044D), }, /* Nokia E61 */
1985 { NOKIA_PCSUITE_ACM_INFO(0x0001), }, /* Nokia E61i */
1986 { NOKIA_PCSUITE_ACM_INFO(0x0475), }, /* Nokia E62 */
1987 { NOKIA_PCSUITE_ACM_INFO(0x0508), }, /* Nokia E65 */
1988 { NOKIA_PCSUITE_ACM_INFO(0x0418), }, /* Nokia E70 */
1989 { NOKIA_PCSUITE_ACM_INFO(0x0425), }, /* Nokia N71 */
1990 { NOKIA_PCSUITE_ACM_INFO(0x0486), }, /* Nokia N73 */
1991 { NOKIA_PCSUITE_ACM_INFO(0x04DF), }, /* Nokia N75 */
1992 { NOKIA_PCSUITE_ACM_INFO(0x000e), }, /* Nokia N77 */
1993 { NOKIA_PCSUITE_ACM_INFO(0x0445), }, /* Nokia N80 */
1994 { NOKIA_PCSUITE_ACM_INFO(0x042F), }, /* Nokia N91 & N91 8GB */
1995 { NOKIA_PCSUITE_ACM_INFO(0x048E), }, /* Nokia N92 */
1996 { NOKIA_PCSUITE_ACM_INFO(0x0420), }, /* Nokia N93 */
1997 { NOKIA_PCSUITE_ACM_INFO(0x04E6), }, /* Nokia N93i */
1998 { NOKIA_PCSUITE_ACM_INFO(0x04B2), }, /* Nokia 5700 XpressMusic */
1999 { NOKIA_PCSUITE_ACM_INFO(0x0134), }, /* Nokia 6110 Navigator (China) */
2000 { NOKIA_PCSUITE_ACM_INFO(0x046E), }, /* Nokia 6110 Navigator */
2001 { NOKIA_PCSUITE_ACM_INFO(0x002f), }, /* Nokia 6120 classic & */
2002 { NOKIA_PCSUITE_ACM_INFO(0x0088), }, /* Nokia 6121 classic */
2003 { NOKIA_PCSUITE_ACM_INFO(0x00fc), }, /* Nokia 6124 classic */
2004 { NOKIA_PCSUITE_ACM_INFO(0x0042), }, /* Nokia E51 */
2005 { NOKIA_PCSUITE_ACM_INFO(0x00b0), }, /* Nokia E66 */
2006 { NOKIA_PCSUITE_ACM_INFO(0x00ab), }, /* Nokia E71 */
2007 { NOKIA_PCSUITE_ACM_INFO(0x0481), }, /* Nokia N76 */
2008 { NOKIA_PCSUITE_ACM_INFO(0x0007), }, /* Nokia N81 & N81 8GB */
2009 { NOKIA_PCSUITE_ACM_INFO(0x0071), }, /* Nokia N82 */
2010 { NOKIA_PCSUITE_ACM_INFO(0x04F0), }, /* Nokia N95 & N95-3 NAM */
2011 { NOKIA_PCSUITE_ACM_INFO(0x0070), }, /* Nokia N95 8GB */
2012 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */
2013 { NOKIA_PCSUITE_ACM_INFO(0x0099), }, /* Nokia 6210 Navigator, RM-367 */
2014 { NOKIA_PCSUITE_ACM_INFO(0x0128), }, /* Nokia 6210 Navigator, RM-419 */
2015 { NOKIA_PCSUITE_ACM_INFO(0x008f), }, /* Nokia 6220 Classic */
2016 { NOKIA_PCSUITE_ACM_INFO(0x00a0), }, /* Nokia 6650 */
2017 { NOKIA_PCSUITE_ACM_INFO(0x007b), }, /* Nokia N78 */
2018 { NOKIA_PCSUITE_ACM_INFO(0x0094), }, /* Nokia N85 */
2019 { NOKIA_PCSUITE_ACM_INFO(0x003a), }, /* Nokia N96 & N96-3 */
2020 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */
2021 { NOKIA_PCSUITE_ACM_INFO(0x0108), }, /* Nokia 5320 XpressMusic 2G */
2022 { NOKIA_PCSUITE_ACM_INFO(0x01f5), }, /* Nokia N97, RM-505 */
2023 { NOKIA_PCSUITE_ACM_INFO(0x02e3), }, /* Nokia 5230, RM-588 */
2024 { NOKIA_PCSUITE_ACM_INFO(0x0178), }, /* Nokia E63 */
2025 { NOKIA_PCSUITE_ACM_INFO(0x010e), }, /* Nokia E75 */
2026 { NOKIA_PCSUITE_ACM_INFO(0x02d9), }, /* Nokia 6760 Slide */
2027 { NOKIA_PCSUITE_ACM_INFO(0x01d0), }, /* Nokia E52 */
2028 { NOKIA_PCSUITE_ACM_INFO(0x0223), }, /* Nokia E72 */
2029 { NOKIA_PCSUITE_ACM_INFO(0x0275), }, /* Nokia X6 */
2030 { NOKIA_PCSUITE_ACM_INFO(0x026c), }, /* Nokia N97 Mini */
2031 { NOKIA_PCSUITE_ACM_INFO(0x0154), }, /* Nokia 5800 XpressMusic */
2032 { NOKIA_PCSUITE_ACM_INFO(0x04ce), }, /* Nokia E90 */
2033 { NOKIA_PCSUITE_ACM_INFO(0x01d4), }, /* Nokia E55 */
2034 { NOKIA_PCSUITE_ACM_INFO(0x0302), }, /* Nokia N8 */
2035 { NOKIA_PCSUITE_ACM_INFO(0x0335), }, /* Nokia E7 */
2036 { NOKIA_PCSUITE_ACM_INFO(0x03cd), }, /* Nokia C7 */
2037 { SAMSUNG_PCSUITE_ACM_INFO(0x6651), }, /* Samsung GTi8510 (INNOV8) */
2038
2039 /* Support for Owen devices */
2040 { USB_DEVICE(0x03eb, 0x0030), }, /* Owen SI30 */
2041
2042 /* NOTE: non-Nokia COMM/ACM/0xff is likely MSFT RNDIS... NOT a modem! */
2043
2044 /* Support Lego NXT using pbLua firmware */
2045 { USB_DEVICE(0x0694, 0xff00),
2046 .driver_info = NOT_A_MODEM,
2047 },
2048
2049 /* Support for Droids MuIn LCD */
2050 { USB_DEVICE(0x04d8, 0x000b),
2051 .driver_info = NO_DATA_INTERFACE,
2052 },
2053
2054 #if IS_ENABLED(CONFIG_INPUT_IMS_PCU)
2055 { USB_DEVICE(0x04d8, 0x0082), /* Application mode */
2056 .driver_info = IGNORE_DEVICE,
2057 },
2058 { USB_DEVICE(0x04d8, 0x0083), /* Bootloader mode */
2059 .driver_info = IGNORE_DEVICE,
2060 },
2061 #endif
2062
2063 /*Samsung phone in firmware update mode */
2064 { USB_DEVICE(0x04e8, 0x685d),
2065 .driver_info = IGNORE_DEVICE,
2066 },
2067
2068 /* Exclude Infineon Flash Loader utility */
2069 { USB_DEVICE(0x058b, 0x0041),
2070 .driver_info = IGNORE_DEVICE,
2071 },
2072
2073 /* control interfaces without any protocol set */
2074 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
2075 USB_CDC_PROTO_NONE) },
2076
2077 /* control interfaces with various AT-command sets */
2078 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
2079 USB_CDC_ACM_PROTO_AT_V25TER) },
2080 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
2081 USB_CDC_ACM_PROTO_AT_PCCA101) },
2082 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
2083 USB_CDC_ACM_PROTO_AT_PCCA101_WAKE) },
2084 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
2085 USB_CDC_ACM_PROTO_AT_GSM) },
2086 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
2087 USB_CDC_ACM_PROTO_AT_3G) },
2088 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
2089 USB_CDC_ACM_PROTO_AT_CDMA) },
2090
2091 { }
2092 };
2093
2094 MODULE_DEVICE_TABLE(usb, acm_ids);
2095
2096 static struct usb_driver acm_driver = {
2097 .name = "cdc_acm",
2098 .probe = acm_probe,
2099 .disconnect = acm_disconnect,
2100 #ifdef CONFIG_PM
2101 .suspend = acm_suspend,
2102 .resume = acm_resume,
2103 .reset_resume = acm_reset_resume,
2104 #endif
2105 .id_table = acm_ids,
2106 #ifdef CONFIG_PM
2107 .supports_autosuspend = 1,
2108 #endif
2109 .disable_hub_initiated_lpm = 1,
2110 };
2111
2112 /*
2113 * TTY driver structures.
2114 */
2115
2116 static const struct tty_operations acm_ops = {
2117 .install = acm_tty_install,
2118 .open = acm_tty_open,
2119 .close = acm_tty_close,
2120 .cleanup = acm_tty_cleanup,
2121 .hangup = acm_tty_hangup,
2122 .write = acm_tty_write,
2123 .write_room = acm_tty_write_room,
2124 .ioctl = acm_tty_ioctl,
2125 .throttle = acm_tty_throttle,
2126 .unthrottle = acm_tty_unthrottle,
2127 .chars_in_buffer = acm_tty_chars_in_buffer,
2128 .break_ctl = acm_tty_break_ctl,
2129 .set_termios = acm_tty_set_termios,
2130 .tiocmget = acm_tty_tiocmget,
2131 .tiocmset = acm_tty_tiocmset,
2132 };
2133
2134 /*
2135 * Init / exit.
2136 */
2137
2138 static int __init acm_init(void)
2139 {
2140 int retval;
2141 #ifdef CONFIG_MTK_DT_USB_SUPPORT
2142 int i;
2143 #endif
2144 acm_tty_driver = alloc_tty_driver(ACM_TTY_MINORS);
2145 if (!acm_tty_driver)
2146 return -ENOMEM;
2147 acm_tty_driver->driver_name = "acm",
2148 acm_tty_driver->name = "ttyACM",
2149 acm_tty_driver->major = ACM_TTY_MAJOR,
2150 acm_tty_driver->minor_start = 0,
2151 acm_tty_driver->type = TTY_DRIVER_TYPE_SERIAL,
2152 acm_tty_driver->subtype = SERIAL_TYPE_NORMAL,
2153 acm_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
2154 acm_tty_driver->init_termios = tty_std_termios;
2155 acm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD |
2156 HUPCL | CLOCAL;
2157 #ifdef CONFIG_MTK_DT_USB_SUPPORT
2158 /* wx, disable echo and other flags in the very beginning.
2159 * otherwise RILD will disable them via calling tcsetattr() after it opened tty port,
2160 * so there may be a gap between port opening and calling tcsetattr(). If modem send data
2161 * at that time, things goes ugly.
2162 */
2163 acm_tty_driver->init_termios.c_iflag = 0;
2164 acm_tty_driver->init_termios.c_oflag = 0;
2165 acm_tty_driver->init_termios.c_lflag = 0;
2166 for(i= 0; i < CB_NUM ; i++){
2167 callback_check_timeout[i] = jiffies;
2168 }
2169 #endif
2170 tty_set_operations(acm_tty_driver, &acm_ops);
2171
2172 retval = tty_register_driver(acm_tty_driver);
2173 if (retval) {
2174 put_tty_driver(acm_tty_driver);
2175 return retval;
2176 }
2177
2178 retval = usb_register(&acm_driver);
2179 if (retval) {
2180 tty_unregister_driver(acm_tty_driver);
2181 put_tty_driver(acm_tty_driver);
2182 return retval;
2183 }
2184
2185 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n");
2186
2187 return 0;
2188 }
2189
2190 static void __exit acm_exit(void)
2191 {
2192 usb_deregister(&acm_driver);
2193 tty_unregister_driver(acm_tty_driver);
2194 put_tty_driver(acm_tty_driver);
2195 }
2196
2197 module_init(acm_init);
2198 module_exit(acm_exit);
2199 #ifdef CONFIG_MTK_DT_USB_SUPPORT
2200 module_param(enable_debug, int, 0644);
2201 module_param(enable_dump, int, 0644);
2202 #endif
2203
2204 MODULE_AUTHOR(DRIVER_AUTHOR);
2205 MODULE_DESCRIPTION(DRIVER_DESC);
2206 MODULE_LICENSE("GPL");
2207 MODULE_ALIAS_CHARDEV_MAJOR(ACM_TTY_MAJOR);
kernel source for telekom puls (alcatel/mediatek)