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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * drivers/usb/input/yealink.c
4 *
5 * Copyright (c) 2005 Henk Vergonet <Henk.Vergonet@gmail.com>
6 */
7/*
8 * Description:
9 * Driver for the USB-P1K voip usb phone.
10 * This device is produced by Yealink Network Technology Co Ltd
11 * but may be branded under several names:
12 * - Yealink usb-p1k
13 * - Tiptel 115
14 * - ...
15 *
16 * This driver is based on:
17 * - the usbb2k-api http://savannah.nongnu.org/projects/usbb2k-api/
18 * - information from http://memeteau.free.fr/usbb2k
19 * - the xpad-driver drivers/input/joystick/xpad.c
20 *
21 * Thanks to:
22 * - Olivier Vandorpe, for providing the usbb2k-api.
23 * - Martin Diehl, for spotting my memory allocation bug.
24 *
25 * History:
26 * 20050527 henk First version, functional keyboard. Keyboard events
27 * will pop-up on the ../input/eventX bus.
28 * 20050531 henk Added led, LCD, dialtone and sysfs interface.
29 * 20050610 henk Cleanups, make it ready for public consumption.
30 * 20050630 henk Cleanups, fixes in response to comments.
31 * 20050701 henk sysfs write serialisation, fix potential unload races
32 * 20050801 henk Added ringtone, restructure USB
33 * 20050816 henk Merge 2.6.13-rc6
34 */
35
36#include <linux/kernel.h>
37#include <linux/slab.h>
38#include <linux/module.h>
39#include <linux/mutex.h>
40#include <linux/usb/input.h>
41#include <linux/map_to_7segment.h>
42
43#include "yealink.h"
44
45#define DRIVER_VERSION "yld-20051230"
46
47#define YEALINK_POLLING_FREQUENCY 10 /* in [Hz] */
48
49struct yld_status {
50 u8 lcd[24];
51 u8 led;
52 u8 dialtone;
53 u8 ringtone;
54 u8 keynum;
55} __attribute__ ((packed));
56
57/*
58 * Register the LCD segment and icon map
59 */
60#define _LOC(k,l) { .a = (k), .m = (l) }
61#define _SEG(t, a, am, b, bm, c, cm, d, dm, e, em, f, fm, g, gm) \
62 { .type = (t), \
63 .u = { .s = { _LOC(a, am), _LOC(b, bm), _LOC(c, cm), \
64 _LOC(d, dm), _LOC(e, em), _LOC(g, gm), \
65 _LOC(f, fm) } } }
66#define _PIC(t, h, hm, n) \
67 { .type = (t), \
68 .u = { .p = { .name = (n), .a = (h), .m = (hm) } } }
69
70static const struct lcd_segment_map {
71 char type;
72 union {
73 struct pictogram_map {
74 u8 a,m;
75 char name[10];
76 } p;
77 struct segment_map {
78 u8 a,m;
79 } s[7];
80 } u;
81} lcdMap[] = {
82#include "yealink.h"
83};
84
85struct yealink_dev {
86 struct input_dev *idev; /* input device */
87 struct usb_device *udev; /* usb device */
88 struct usb_interface *intf; /* usb interface */
89
90 /* irq input channel */
91 struct yld_ctl_packet *irq_data;
92 dma_addr_t irq_dma;
93 struct urb *urb_irq;
94
95 /* control output channel */
96 struct yld_ctl_packet *ctl_data;
97 dma_addr_t ctl_dma;
98 struct usb_ctrlrequest *ctl_req;
99 struct urb *urb_ctl;
100
101 char phys[64]; /* physical device path */
102
103 u8 lcdMap[ARRAY_SIZE(lcdMap)]; /* state of LCD, LED ... */
104 int key_code; /* last reported key */
105
106 struct mutex sysfs_mutex;
107
108 unsigned int shutdown:1;
109
110 int stat_ix;
111 union {
112 struct yld_status s;
113 u8 b[sizeof(struct yld_status)];
114 } master, copy;
115};
116
117
118/*******************************************************************************
119 * Yealink lcd interface
120 ******************************************************************************/
121
122/*
123 * Register a default 7 segment character set
124 */
125static SEG7_DEFAULT_MAP(map_seg7);
126
127 /* Display a char,
128 * char '\9' and '\n' are placeholders and do not overwrite the original text.
129 * A space will always hide an icon.
130 */
131static int setChar(struct yealink_dev *yld, int el, int chr)
132{
133 int i, a, m, val;
134
135 if (el >= ARRAY_SIZE(lcdMap))
136 return -EINVAL;
137
138 if (chr == '\t' || chr == '\n')
139 return 0;
140
141 yld->lcdMap[el] = chr;
142
143 if (lcdMap[el].type == '.') {
144 a = lcdMap[el].u.p.a;
145 m = lcdMap[el].u.p.m;
146 if (chr != ' ')
147 yld->master.b[a] |= m;
148 else
149 yld->master.b[a] &= ~m;
150 return 0;
151 }
152
153 val = map_to_seg7(&map_seg7, chr);
154 for (i = 0; i < ARRAY_SIZE(lcdMap[0].u.s); i++) {
155 m = lcdMap[el].u.s[i].m;
156
157 if (m == 0)
158 continue;
159
160 a = lcdMap[el].u.s[i].a;
161 if (val & 1)
162 yld->master.b[a] |= m;
163 else
164 yld->master.b[a] &= ~m;
165 val = val >> 1;
166 }
167 return 0;
168};
169
170/*******************************************************************************
171 * Yealink key interface
172 ******************************************************************************/
173
174/* Map device buttons to internal key events.
175 *
176 * USB-P1K button layout:
177 *
178 * up
179 * IN OUT
180 * down
181 *
182 * pickup C hangup
183 * 1 2 3
184 * 4 5 6
185 * 7 8 9
186 * * 0 #
187 *
188 * The "up" and "down" keys, are symbolised by arrows on the button.
189 * The "pickup" and "hangup" keys are symbolised by a green and red phone
190 * on the button.
191 */
192static int map_p1k_to_key(int scancode)
193{
194 switch(scancode) { /* phone key: */
195 case 0x23: return KEY_LEFT; /* IN */
196 case 0x33: return KEY_UP; /* up */
197 case 0x04: return KEY_RIGHT; /* OUT */
198 case 0x24: return KEY_DOWN; /* down */
199 case 0x03: return KEY_ENTER; /* pickup */
200 case 0x14: return KEY_BACKSPACE; /* C */
201 case 0x13: return KEY_ESC; /* hangup */
202 case 0x00: return KEY_1; /* 1 */
203 case 0x01: return KEY_2; /* 2 */
204 case 0x02: return KEY_3; /* 3 */
205 case 0x10: return KEY_4; /* 4 */
206 case 0x11: return KEY_5; /* 5 */
207 case 0x12: return KEY_6; /* 6 */
208 case 0x20: return KEY_7; /* 7 */
209 case 0x21: return KEY_8; /* 8 */
210 case 0x22: return KEY_9; /* 9 */
211 case 0x30: return KEY_KPASTERISK; /* * */
212 case 0x31: return KEY_0; /* 0 */
213 case 0x32: return KEY_LEFTSHIFT |
214 KEY_3 << 8; /* # */
215 }
216 return -EINVAL;
217}
218
219/* Completes a request by converting the data into events for the
220 * input subsystem.
221 *
222 * The key parameter can be cascaded: key2 << 8 | key1
223 */
224static void report_key(struct yealink_dev *yld, int key)
225{
226 struct input_dev *idev = yld->idev;
227
228 if (yld->key_code >= 0) {
229 /* old key up */
230 input_report_key(idev, yld->key_code & 0xff, 0);
231 if (yld->key_code >> 8)
232 input_report_key(idev, yld->key_code >> 8, 0);
233 }
234
235 yld->key_code = key;
236 if (key >= 0) {
237 /* new valid key */
238 input_report_key(idev, key & 0xff, 1);
239 if (key >> 8)
240 input_report_key(idev, key >> 8, 1);
241 }
242 input_sync(idev);
243}
244
245/*******************************************************************************
246 * Yealink usb communication interface
247 ******************************************************************************/
248
249static int yealink_cmd(struct yealink_dev *yld, struct yld_ctl_packet *p)
250{
251 u8 *buf = (u8 *)p;
252 int i;
253 u8 sum = 0;
254
255 for(i=0; i<USB_PKT_LEN-1; i++)
256 sum -= buf[i];
257 p->sum = sum;
258 return usb_control_msg(yld->udev,
259 usb_sndctrlpipe(yld->udev, 0),
260 USB_REQ_SET_CONFIGURATION,
261 USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_OUT,
262 0x200, 3,
263 p, sizeof(*p),
264 USB_CTRL_SET_TIMEOUT);
265}
266
267static u8 default_ringtone[] = {
268 0xEF, /* volume [0-255] */
269 0xFB, 0x1E, 0x00, 0x0C, /* 1250 [hz], 12/100 [s] */
270 0xFC, 0x18, 0x00, 0x0C, /* 1000 [hz], 12/100 [s] */
271 0xFB, 0x1E, 0x00, 0x0C,
272 0xFC, 0x18, 0x00, 0x0C,
273 0xFB, 0x1E, 0x00, 0x0C,
274 0xFC, 0x18, 0x00, 0x0C,
275 0xFB, 0x1E, 0x00, 0x0C,
276 0xFC, 0x18, 0x00, 0x0C,
277 0xFF, 0xFF, 0x01, 0x90, /* silent, 400/100 [s] */
278 0x00, 0x00 /* end of sequence */
279};
280
281static int yealink_set_ringtone(struct yealink_dev *yld, u8 *buf, size_t size)
282{
283 struct yld_ctl_packet *p = yld->ctl_data;
284 int ix, len;
285
286 if (size <= 0)
287 return -EINVAL;
288
289 /* Set the ringtone volume */
290 memset(yld->ctl_data, 0, sizeof(*(yld->ctl_data)));
291 yld->ctl_data->cmd = CMD_RING_VOLUME;
292 yld->ctl_data->size = 1;
293 yld->ctl_data->data[0] = buf[0];
294 yealink_cmd(yld, p);
295
296 buf++;
297 size--;
298
299 p->cmd = CMD_RING_NOTE;
300 ix = 0;
301 while (size != ix) {
302 len = size - ix;
303 if (len > sizeof(p->data))
304 len = sizeof(p->data);
305 p->size = len;
306 p->offset = cpu_to_be16(ix);
307 memcpy(p->data, &buf[ix], len);
308 yealink_cmd(yld, p);
309 ix += len;
310 }
311 return 0;
312}
313
314/* keep stat_master & stat_copy in sync.
315 */
316static int yealink_do_idle_tasks(struct yealink_dev *yld)
317{
318 u8 val;
319 int i, ix, len;
320
321 ix = yld->stat_ix;
322
323 memset(yld->ctl_data, 0, sizeof(*(yld->ctl_data)));
324 yld->ctl_data->cmd = CMD_KEYPRESS;
325 yld->ctl_data->size = 1;
326 yld->ctl_data->sum = 0xff - CMD_KEYPRESS;
327
328 /* If state update pointer wraps do a KEYPRESS first. */
329 if (ix >= sizeof(yld->master)) {
330 yld->stat_ix = 0;
331 return 0;
332 }
333
334 /* find update candidates: copy != master */
335 do {
336 val = yld->master.b[ix];
337 if (val != yld->copy.b[ix])
338 goto send_update;
339 } while (++ix < sizeof(yld->master));
340
341 /* nothing todo, wait a bit and poll for a KEYPRESS */
342 yld->stat_ix = 0;
343 /* TODO how can we wait abit. ??
344 * msleep_interruptible(1000 / YEALINK_POLLING_FREQUENCY);
345 */
346 return 0;
347
348send_update:
349
350 /* Setup an appropriate update request */
351 yld->copy.b[ix] = val;
352 yld->ctl_data->data[0] = val;
353
354 switch(ix) {
355 case offsetof(struct yld_status, led):
356 yld->ctl_data->cmd = CMD_LED;
357 yld->ctl_data->sum = -1 - CMD_LED - val;
358 break;
359 case offsetof(struct yld_status, dialtone):
360 yld->ctl_data->cmd = CMD_DIALTONE;
361 yld->ctl_data->sum = -1 - CMD_DIALTONE - val;
362 break;
363 case offsetof(struct yld_status, ringtone):
364 yld->ctl_data->cmd = CMD_RINGTONE;
365 yld->ctl_data->sum = -1 - CMD_RINGTONE - val;
366 break;
367 case offsetof(struct yld_status, keynum):
368 val--;
369 val &= 0x1f;
370 yld->ctl_data->cmd = CMD_SCANCODE;
371 yld->ctl_data->offset = cpu_to_be16(val);
372 yld->ctl_data->data[0] = 0;
373 yld->ctl_data->sum = -1 - CMD_SCANCODE - val;
374 break;
375 default:
376 len = sizeof(yld->master.s.lcd) - ix;
377 if (len > sizeof(yld->ctl_data->data))
378 len = sizeof(yld->ctl_data->data);
379
380 /* Combine up to <len> consecutive LCD bytes in a single request
381 */
382 yld->ctl_data->cmd = CMD_LCD;
383 yld->ctl_data->offset = cpu_to_be16(ix);
384 yld->ctl_data->size = len;
385 yld->ctl_data->sum = -CMD_LCD - ix - val - len;
386 for(i=1; i<len; i++) {
387 ix++;
388 val = yld->master.b[ix];
389 yld->copy.b[ix] = val;
390 yld->ctl_data->data[i] = val;
391 yld->ctl_data->sum -= val;
392 }
393 }
394 yld->stat_ix = ix + 1;
395 return 1;
396}
397
398/* Decide on how to handle responses
399 *
400 * The state transition diagram is somethhing like:
401 *
402 * syncState<--+
403 * | |
404 * | idle
405 * \|/ |
406 * init --ok--> waitForKey --ok--> getKey
407 * ^ ^ |
408 * | +-------ok-------+
409 * error,start
410 *
411 */
412static void urb_irq_callback(struct urb *urb)
413{
414 struct yealink_dev *yld = urb->context;
415 int ret, status = urb->status;
416
417 if (status)
418 dev_err(&yld->intf->dev, "%s - urb status %d\n",
419 __func__, status);
420
421 switch (yld->irq_data->cmd) {
422 case CMD_KEYPRESS:
423
424 yld->master.s.keynum = yld->irq_data->data[0];
425 break;
426
427 case CMD_SCANCODE:
428 dev_dbg(&yld->intf->dev, "get scancode %x\n",
429 yld->irq_data->data[0]);
430
431 report_key(yld, map_p1k_to_key(yld->irq_data->data[0]));
432 break;
433
434 default:
435 dev_err(&yld->intf->dev, "unexpected response %x\n",
436 yld->irq_data->cmd);
437 }
438
439 yealink_do_idle_tasks(yld);
440
441 if (!yld->shutdown) {
442 ret = usb_submit_urb(yld->urb_ctl, GFP_ATOMIC);
443 if (ret && ret != -EPERM)
444 dev_err(&yld->intf->dev,
445 "%s - usb_submit_urb failed %d\n",
446 __func__, ret);
447 }
448}
449
450static void urb_ctl_callback(struct urb *urb)
451{
452 struct yealink_dev *yld = urb->context;
453 int ret = 0, status = urb->status;
454
455 if (status)
456 dev_err(&yld->intf->dev, "%s - urb status %d\n",
457 __func__, status);
458
459 switch (yld->ctl_data->cmd) {
460 case CMD_KEYPRESS:
461 case CMD_SCANCODE:
462 /* ask for a response */
463 if (!yld->shutdown)
464 ret = usb_submit_urb(yld->urb_irq, GFP_ATOMIC);
465 break;
466 default:
467 /* send new command */
468 yealink_do_idle_tasks(yld);
469 if (!yld->shutdown)
470 ret = usb_submit_urb(yld->urb_ctl, GFP_ATOMIC);
471 break;
472 }
473
474 if (ret && ret != -EPERM)
475 dev_err(&yld->intf->dev, "%s - usb_submit_urb failed %d\n",
476 __func__, ret);
477}
478
479/*******************************************************************************
480 * input event interface
481 ******************************************************************************/
482
483/* TODO should we issue a ringtone on a SND_BELL event?
484static int input_ev(struct input_dev *dev, unsigned int type,
485 unsigned int code, int value)
486{
487
488 if (type != EV_SND)
489 return -EINVAL;
490
491 switch (code) {
492 case SND_BELL:
493 case SND_TONE:
494 break;
495 default:
496 return -EINVAL;
497 }
498
499 return 0;
500}
501*/
502
503static int input_open(struct input_dev *dev)
504{
505 struct yealink_dev *yld = input_get_drvdata(dev);
506 int i, ret;
507
508 dev_dbg(&yld->intf->dev, "%s\n", __func__);
509
510 /* force updates to device */
511 for (i = 0; i<sizeof(yld->master); i++)
512 yld->copy.b[i] = ~yld->master.b[i];
513 yld->key_code = -1; /* no keys pressed */
514
515 yealink_set_ringtone(yld, default_ringtone, sizeof(default_ringtone));
516
517 /* issue INIT */
518 memset(yld->ctl_data, 0, sizeof(*(yld->ctl_data)));
519 yld->ctl_data->cmd = CMD_INIT;
520 yld->ctl_data->size = 10;
521 yld->ctl_data->sum = 0x100-CMD_INIT-10;
522 if ((ret = usb_submit_urb(yld->urb_ctl, GFP_KERNEL)) != 0) {
523 dev_dbg(&yld->intf->dev,
524 "%s - usb_submit_urb failed with result %d\n",
525 __func__, ret);
526 return ret;
527 }
528 return 0;
529}
530
531static void input_close(struct input_dev *dev)
532{
533 struct yealink_dev *yld = input_get_drvdata(dev);
534
535 yld->shutdown = 1;
536 /*
537 * Make sure the flag is seen by other CPUs before we start
538 * killing URBs so new URBs won't be submitted
539 */
540 smp_wmb();
541
542 usb_kill_urb(yld->urb_ctl);
543 usb_kill_urb(yld->urb_irq);
544
545 yld->shutdown = 0;
546 smp_wmb();
547}
548
549/*******************************************************************************
550 * sysfs interface
551 ******************************************************************************/
552
553/* Interface to the 7-segments translation table aka. char set.
554 */
555static ssize_t show_map(struct device *dev, struct device_attribute *attr,
556 char *buf)
557{
558 memcpy(buf, &map_seg7, sizeof(map_seg7));
559 return sizeof(map_seg7);
560}
561
562static ssize_t store_map(struct device *dev, struct device_attribute *attr,
563 const char *buf, size_t cnt)
564{
565 if (cnt != sizeof(map_seg7))
566 return -EINVAL;
567 memcpy(&map_seg7, buf, sizeof(map_seg7));
568 return sizeof(map_seg7);
569}
570
571/* Interface to the LCD.
572 */
573
574/* Reading /sys/../lineX will return the format string with its settings:
575 *
576 * Example:
577 * cat ./line3
578 * 888888888888
579 * Linux Rocks!
580 */
581static ssize_t show_line(struct device *dev, char *buf, int a, int b)
582{
583 struct yealink_dev *yld = dev_get_drvdata(dev);
584 int i;
585
586 guard(mutex)(&yld->sysfs_mutex);
587
588 for (i = a; i < b; i++)
589 *buf++ = lcdMap[i].type;
590 *buf++ = '\n';
591 for (i = a; i < b; i++)
592 *buf++ = yld->lcdMap[i];
593 *buf++ = '\n';
594 *buf = 0;
595
596 return 3 + ((b - a) << 1);
597}
598
599static ssize_t show_line1(struct device *dev, struct device_attribute *attr,
600 char *buf)
601{
602 return show_line(dev, buf, LCD_LINE1_OFFSET, LCD_LINE2_OFFSET);
603}
604
605static ssize_t show_line2(struct device *dev, struct device_attribute *attr,
606 char *buf)
607{
608 return show_line(dev, buf, LCD_LINE2_OFFSET, LCD_LINE3_OFFSET);
609}
610
611static ssize_t show_line3(struct device *dev, struct device_attribute *attr,
612 char *buf)
613{
614 return show_line(dev, buf, LCD_LINE3_OFFSET, LCD_LINE4_OFFSET);
615}
616
617/* Writing to /sys/../lineX will set the corresponding LCD line.
618 * - Excess characters are ignored.
619 * - If less characters are written than allowed, the remaining digits are
620 * unchanged.
621 * - The '\n' or '\t' char is a placeholder, it does not overwrite the
622 * original content.
623 */
624static ssize_t store_line(struct device *dev, const char *buf, size_t count,
625 int el, size_t len)
626{
627 struct yealink_dev *yld = dev_get_drvdata(dev);
628 int i;
629
630 guard(mutex)(&yld->sysfs_mutex);
631
632 if (len > count)
633 len = count;
634 for (i = 0; i < len; i++)
635 setChar(yld, el++, buf[i]);
636
637 return count;
638}
639
640static ssize_t store_line1(struct device *dev, struct device_attribute *attr,
641 const char *buf, size_t count)
642{
643 return store_line(dev, buf, count, LCD_LINE1_OFFSET, LCD_LINE1_SIZE);
644}
645
646static ssize_t store_line2(struct device *dev, struct device_attribute *attr,
647 const char *buf, size_t count)
648{
649 return store_line(dev, buf, count, LCD_LINE2_OFFSET, LCD_LINE2_SIZE);
650}
651
652static ssize_t store_line3(struct device *dev, struct device_attribute *attr,
653 const char *buf, size_t count)
654{
655 return store_line(dev, buf, count, LCD_LINE3_OFFSET, LCD_LINE3_SIZE);
656}
657
658/* Interface to visible and audible "icons", these include:
659 * pictures on the LCD, the LED, and the dialtone signal.
660 */
661
662/* Get a list of "switchable elements" with their current state. */
663static ssize_t get_icons(struct device *dev, struct device_attribute *attr,
664 char *buf)
665{
666 struct yealink_dev *yld = dev_get_drvdata(dev);
667 int i, ret = 1;
668
669 guard(mutex)(&yld->sysfs_mutex);
670
671 for (i = 0; i < ARRAY_SIZE(lcdMap); i++) {
672 if (lcdMap[i].type != '.')
673 continue;
674 ret += sprintf(&buf[ret], "%s %s\n",
675 yld->lcdMap[i] == ' ' ? " " : "on",
676 lcdMap[i].u.p.name);
677 }
678
679 return ret;
680}
681
682/* Change the visibility of a particular element. */
683static ssize_t set_icon(struct device *dev, const char *buf, size_t count,
684 int chr)
685{
686 struct yealink_dev *yld = dev_get_drvdata(dev);
687 int i;
688
689 guard(mutex)(&yld->sysfs_mutex);
690
691 for (i = 0; i < ARRAY_SIZE(lcdMap); i++) {
692 if (lcdMap[i].type != '.')
693 continue;
694 if (strncmp(buf, lcdMap[i].u.p.name, count) == 0) {
695 setChar(yld, i, chr);
696 break;
697 }
698 }
699
700 return count;
701}
702
703static ssize_t show_icon(struct device *dev, struct device_attribute *attr,
704 const char *buf, size_t count)
705{
706 return set_icon(dev, buf, count, buf[0]);
707}
708
709static ssize_t hide_icon(struct device *dev, struct device_attribute *attr,
710 const char *buf, size_t count)
711{
712 return set_icon(dev, buf, count, ' ');
713}
714
715/* Upload a ringtone to the device.
716 */
717
718/* Stores raw ringtone data in the phone */
719static ssize_t store_ringtone(struct device *dev, struct device_attribute *attr,
720 const char *buf, size_t count)
721{
722 struct yealink_dev *yld = dev_get_drvdata(dev);
723
724 guard(mutex)(&yld->sysfs_mutex);
725
726 /* TODO locking with async usb control interface??? */
727 yealink_set_ringtone(yld, (char *)buf, count);
728
729 return count;
730}
731
732#define _M444 S_IRUGO
733#define _M664 S_IRUGO|S_IWUSR|S_IWGRP
734#define _M220 S_IWUSR|S_IWGRP
735
736static DEVICE_ATTR(map_seg7 , _M664, show_map , store_map );
737static DEVICE_ATTR(line1 , _M664, show_line1 , store_line1 );
738static DEVICE_ATTR(line2 , _M664, show_line2 , store_line2 );
739static DEVICE_ATTR(line3 , _M664, show_line3 , store_line3 );
740static DEVICE_ATTR(get_icons , _M444, get_icons , NULL );
741static DEVICE_ATTR(show_icon , _M220, NULL , show_icon );
742static DEVICE_ATTR(hide_icon , _M220, NULL , hide_icon );
743static DEVICE_ATTR(ringtone , _M220, NULL , store_ringtone);
744
745static struct attribute *yld_attrs[] = {
746 &dev_attr_line1.attr,
747 &dev_attr_line2.attr,
748 &dev_attr_line3.attr,
749 &dev_attr_get_icons.attr,
750 &dev_attr_show_icon.attr,
751 &dev_attr_hide_icon.attr,
752 &dev_attr_map_seg7.attr,
753 &dev_attr_ringtone.attr,
754 NULL
755};
756ATTRIBUTE_GROUPS(yld);
757
758/*******************************************************************************
759 * Linux interface and usb initialisation
760 ******************************************************************************/
761
762struct driver_info {
763 char *name;
764};
765
766static const struct driver_info info_P1K = {
767 .name = "Yealink usb-p1k",
768};
769
770static const struct usb_device_id usb_table [] = {
771 {
772 .match_flags = USB_DEVICE_ID_MATCH_DEVICE |
773 USB_DEVICE_ID_MATCH_INT_INFO,
774 .idVendor = 0x6993,
775 .idProduct = 0xb001,
776 .bInterfaceClass = USB_CLASS_HID,
777 .bInterfaceSubClass = 0,
778 .bInterfaceProtocol = 0,
779 .driver_info = (kernel_ulong_t)&info_P1K
780 },
781 { }
782};
783
784static int usb_cleanup(struct yealink_dev *yld, int err)
785{
786 if (yld == NULL)
787 return err;
788
789 if (yld->idev) {
790 if (err)
791 input_free_device(yld->idev);
792 else
793 input_unregister_device(yld->idev);
794 }
795
796 usb_free_urb(yld->urb_irq);
797 usb_free_urb(yld->urb_ctl);
798
799 kfree(yld->ctl_req);
800 usb_free_coherent(yld->udev, USB_PKT_LEN, yld->ctl_data, yld->ctl_dma);
801 usb_free_coherent(yld->udev, USB_PKT_LEN, yld->irq_data, yld->irq_dma);
802
803 kfree(yld);
804 return err;
805}
806
807static void usb_disconnect(struct usb_interface *intf)
808{
809 struct yealink_dev *yld = usb_get_intfdata(intf);
810
811 usb_cleanup(yld, 0);
812 usb_set_intfdata(intf, NULL);
813}
814
815static int usb_probe(struct usb_interface *intf, const struct usb_device_id *id)
816{
817 struct usb_device *udev = interface_to_usbdev (intf);
818 struct driver_info *nfo = (struct driver_info *)id->driver_info;
819 struct usb_host_interface *interface;
820 struct usb_endpoint_descriptor *endpoint;
821 struct yealink_dev *yld;
822 struct input_dev *input_dev;
823 int ret, pipe, i;
824
825 interface = intf->cur_altsetting;
826
827 if (interface->desc.bNumEndpoints < 1)
828 return -ENODEV;
829
830 endpoint = &interface->endpoint[0].desc;
831 if (!usb_endpoint_is_int_in(endpoint))
832 return -ENODEV;
833
834 yld = kzalloc(sizeof(*yld), GFP_KERNEL);
835 if (!yld)
836 return -ENOMEM;
837
838 yld->udev = udev;
839 yld->intf = intf;
840 mutex_init(&yld->sysfs_mutex);
841
842 yld->idev = input_dev = input_allocate_device();
843 if (!input_dev)
844 return usb_cleanup(yld, -ENOMEM);
845
846 /* allocate usb buffers */
847 yld->irq_data = usb_alloc_coherent(udev, USB_PKT_LEN,
848 GFP_KERNEL, &yld->irq_dma);
849 if (yld->irq_data == NULL)
850 return usb_cleanup(yld, -ENOMEM);
851
852 yld->ctl_data = usb_alloc_coherent(udev, USB_PKT_LEN,
853 GFP_KERNEL, &yld->ctl_dma);
854 if (!yld->ctl_data)
855 return usb_cleanup(yld, -ENOMEM);
856
857 yld->ctl_req = kmalloc(sizeof(*(yld->ctl_req)), GFP_KERNEL);
858 if (yld->ctl_req == NULL)
859 return usb_cleanup(yld, -ENOMEM);
860
861 /* allocate urb structures */
862 yld->urb_irq = usb_alloc_urb(0, GFP_KERNEL);
863 if (yld->urb_irq == NULL)
864 return usb_cleanup(yld, -ENOMEM);
865
866 yld->urb_ctl = usb_alloc_urb(0, GFP_KERNEL);
867 if (yld->urb_ctl == NULL)
868 return usb_cleanup(yld, -ENOMEM);
869
870 /* get a handle to the interrupt data pipe */
871 pipe = usb_rcvintpipe(udev, endpoint->bEndpointAddress);
872 ret = usb_maxpacket(udev, pipe);
873 if (ret != USB_PKT_LEN)
874 dev_err(&intf->dev, "invalid payload size %d, expected %zd\n",
875 ret, USB_PKT_LEN);
876
877 /* initialise irq urb */
878 usb_fill_int_urb(yld->urb_irq, udev, pipe, yld->irq_data,
879 USB_PKT_LEN,
880 urb_irq_callback,
881 yld, endpoint->bInterval);
882 yld->urb_irq->transfer_dma = yld->irq_dma;
883 yld->urb_irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
884 yld->urb_irq->dev = udev;
885
886 /* initialise ctl urb */
887 yld->ctl_req->bRequestType = USB_TYPE_CLASS | USB_RECIP_INTERFACE |
888 USB_DIR_OUT;
889 yld->ctl_req->bRequest = USB_REQ_SET_CONFIGURATION;
890 yld->ctl_req->wValue = cpu_to_le16(0x200);
891 yld->ctl_req->wIndex = cpu_to_le16(interface->desc.bInterfaceNumber);
892 yld->ctl_req->wLength = cpu_to_le16(USB_PKT_LEN);
893
894 usb_fill_control_urb(yld->urb_ctl, udev, usb_sndctrlpipe(udev, 0),
895 (void *)yld->ctl_req, yld->ctl_data, USB_PKT_LEN,
896 urb_ctl_callback, yld);
897 yld->urb_ctl->transfer_dma = yld->ctl_dma;
898 yld->urb_ctl->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
899 yld->urb_ctl->dev = udev;
900
901 /* find out the physical bus location */
902 usb_make_path(udev, yld->phys, sizeof(yld->phys));
903 strlcat(yld->phys, "/input0", sizeof(yld->phys));
904
905 /* register settings for the input device */
906 input_dev->name = nfo->name;
907 input_dev->phys = yld->phys;
908 usb_to_input_id(udev, &input_dev->id);
909 input_dev->dev.parent = &intf->dev;
910
911 input_set_drvdata(input_dev, yld);
912
913 input_dev->open = input_open;
914 input_dev->close = input_close;
915 /* input_dev->event = input_ev; TODO */
916
917 /* register available key events */
918 input_dev->evbit[0] = BIT_MASK(EV_KEY);
919 for (i = 0; i < 256; i++) {
920 int k = map_p1k_to_key(i);
921 if (k >= 0) {
922 set_bit(k & 0xff, input_dev->keybit);
923 if (k >> 8)
924 set_bit(k >> 8, input_dev->keybit);
925 }
926 }
927
928 ret = input_register_device(yld->idev);
929 if (ret)
930 return usb_cleanup(yld, ret);
931
932 usb_set_intfdata(intf, yld);
933
934 /* clear visible elements */
935 for (i = 0; i < ARRAY_SIZE(lcdMap); i++)
936 setChar(yld, i, ' ');
937
938 /* display driver version on LCD line 3 */
939 store_line3(&intf->dev, NULL,
940 DRIVER_VERSION, sizeof(DRIVER_VERSION));
941
942 return 0;
943}
944
945static struct usb_driver yealink_driver = {
946 .name = "yealink",
947 .probe = usb_probe,
948 .disconnect = usb_disconnect,
949 .id_table = usb_table,
950 .dev_groups = yld_groups,
951};
952
953module_usb_driver(yealink_driver);
954
955MODULE_DEVICE_TABLE (usb, usb_table);
956
957MODULE_AUTHOR("Henk Vergonet");
958MODULE_DESCRIPTION("Yealink phone driver");
959MODULE_LICENSE("GPL");
1/*
2 * drivers/usb/input/yealink.c
3 *
4 * Copyright (c) 2005 Henk Vergonet <Henk.Vergonet@gmail.com>
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License as
8 * published by the Free Software Foundation; either version 2 of
9 * the License, or (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 */
20/*
21 * Description:
22 * Driver for the USB-P1K voip usb phone.
23 * This device is produced by Yealink Network Technology Co Ltd
24 * but may be branded under several names:
25 * - Yealink usb-p1k
26 * - Tiptel 115
27 * - ...
28 *
29 * This driver is based on:
30 * - the usbb2k-api http://savannah.nongnu.org/projects/usbb2k-api/
31 * - information from http://memeteau.free.fr/usbb2k
32 * - the xpad-driver drivers/input/joystick/xpad.c
33 *
34 * Thanks to:
35 * - Olivier Vandorpe, for providing the usbb2k-api.
36 * - Martin Diehl, for spotting my memory allocation bug.
37 *
38 * History:
39 * 20050527 henk First version, functional keyboard. Keyboard events
40 * will pop-up on the ../input/eventX bus.
41 * 20050531 henk Added led, LCD, dialtone and sysfs interface.
42 * 20050610 henk Cleanups, make it ready for public consumption.
43 * 20050630 henk Cleanups, fixes in response to comments.
44 * 20050701 henk sysfs write serialisation, fix potential unload races
45 * 20050801 henk Added ringtone, restructure USB
46 * 20050816 henk Merge 2.6.13-rc6
47 */
48
49#include <linux/kernel.h>
50#include <linux/slab.h>
51#include <linux/module.h>
52#include <linux/rwsem.h>
53#include <linux/usb/input.h>
54#include <linux/map_to_7segment.h>
55
56#include "yealink.h"
57
58#define DRIVER_VERSION "yld-20051230"
59#define DRIVER_AUTHOR "Henk Vergonet"
60#define DRIVER_DESC "Yealink phone driver"
61
62#define YEALINK_POLLING_FREQUENCY 10 /* in [Hz] */
63
64struct yld_status {
65 u8 lcd[24];
66 u8 led;
67 u8 dialtone;
68 u8 ringtone;
69 u8 keynum;
70} __attribute__ ((packed));
71
72/*
73 * Register the LCD segment and icon map
74 */
75#define _LOC(k,l) { .a = (k), .m = (l) }
76#define _SEG(t, a, am, b, bm, c, cm, d, dm, e, em, f, fm, g, gm) \
77 { .type = (t), \
78 .u = { .s = { _LOC(a, am), _LOC(b, bm), _LOC(c, cm), \
79 _LOC(d, dm), _LOC(e, em), _LOC(g, gm), \
80 _LOC(f, fm) } } }
81#define _PIC(t, h, hm, n) \
82 { .type = (t), \
83 .u = { .p = { .name = (n), .a = (h), .m = (hm) } } }
84
85static const struct lcd_segment_map {
86 char type;
87 union {
88 struct pictogram_map {
89 u8 a,m;
90 char name[10];
91 } p;
92 struct segment_map {
93 u8 a,m;
94 } s[7];
95 } u;
96} lcdMap[] = {
97#include "yealink.h"
98};
99
100struct yealink_dev {
101 struct input_dev *idev; /* input device */
102 struct usb_device *udev; /* usb device */
103 struct usb_interface *intf; /* usb interface */
104
105 /* irq input channel */
106 struct yld_ctl_packet *irq_data;
107 dma_addr_t irq_dma;
108 struct urb *urb_irq;
109
110 /* control output channel */
111 struct yld_ctl_packet *ctl_data;
112 dma_addr_t ctl_dma;
113 struct usb_ctrlrequest *ctl_req;
114 struct urb *urb_ctl;
115
116 char phys[64]; /* physical device path */
117
118 u8 lcdMap[ARRAY_SIZE(lcdMap)]; /* state of LCD, LED ... */
119 int key_code; /* last reported key */
120
121 unsigned int shutdown:1;
122
123 int stat_ix;
124 union {
125 struct yld_status s;
126 u8 b[sizeof(struct yld_status)];
127 } master, copy;
128};
129
130
131/*******************************************************************************
132 * Yealink lcd interface
133 ******************************************************************************/
134
135/*
136 * Register a default 7 segment character set
137 */
138static SEG7_DEFAULT_MAP(map_seg7);
139
140 /* Display a char,
141 * char '\9' and '\n' are placeholders and do not overwrite the original text.
142 * A space will always hide an icon.
143 */
144static int setChar(struct yealink_dev *yld, int el, int chr)
145{
146 int i, a, m, val;
147
148 if (el >= ARRAY_SIZE(lcdMap))
149 return -EINVAL;
150
151 if (chr == '\t' || chr == '\n')
152 return 0;
153
154 yld->lcdMap[el] = chr;
155
156 if (lcdMap[el].type == '.') {
157 a = lcdMap[el].u.p.a;
158 m = lcdMap[el].u.p.m;
159 if (chr != ' ')
160 yld->master.b[a] |= m;
161 else
162 yld->master.b[a] &= ~m;
163 return 0;
164 }
165
166 val = map_to_seg7(&map_seg7, chr);
167 for (i = 0; i < ARRAY_SIZE(lcdMap[0].u.s); i++) {
168 m = lcdMap[el].u.s[i].m;
169
170 if (m == 0)
171 continue;
172
173 a = lcdMap[el].u.s[i].a;
174 if (val & 1)
175 yld->master.b[a] |= m;
176 else
177 yld->master.b[a] &= ~m;
178 val = val >> 1;
179 }
180 return 0;
181};
182
183/*******************************************************************************
184 * Yealink key interface
185 ******************************************************************************/
186
187/* Map device buttons to internal key events.
188 *
189 * USB-P1K button layout:
190 *
191 * up
192 * IN OUT
193 * down
194 *
195 * pickup C hangup
196 * 1 2 3
197 * 4 5 6
198 * 7 8 9
199 * * 0 #
200 *
201 * The "up" and "down" keys, are symbolised by arrows on the button.
202 * The "pickup" and "hangup" keys are symbolised by a green and red phone
203 * on the button.
204 */
205static int map_p1k_to_key(int scancode)
206{
207 switch(scancode) { /* phone key: */
208 case 0x23: return KEY_LEFT; /* IN */
209 case 0x33: return KEY_UP; /* up */
210 case 0x04: return KEY_RIGHT; /* OUT */
211 case 0x24: return KEY_DOWN; /* down */
212 case 0x03: return KEY_ENTER; /* pickup */
213 case 0x14: return KEY_BACKSPACE; /* C */
214 case 0x13: return KEY_ESC; /* hangup */
215 case 0x00: return KEY_1; /* 1 */
216 case 0x01: return KEY_2; /* 2 */
217 case 0x02: return KEY_3; /* 3 */
218 case 0x10: return KEY_4; /* 4 */
219 case 0x11: return KEY_5; /* 5 */
220 case 0x12: return KEY_6; /* 6 */
221 case 0x20: return KEY_7; /* 7 */
222 case 0x21: return KEY_8; /* 8 */
223 case 0x22: return KEY_9; /* 9 */
224 case 0x30: return KEY_KPASTERISK; /* * */
225 case 0x31: return KEY_0; /* 0 */
226 case 0x32: return KEY_LEFTSHIFT |
227 KEY_3 << 8; /* # */
228 }
229 return -EINVAL;
230}
231
232/* Completes a request by converting the data into events for the
233 * input subsystem.
234 *
235 * The key parameter can be cascaded: key2 << 8 | key1
236 */
237static void report_key(struct yealink_dev *yld, int key)
238{
239 struct input_dev *idev = yld->idev;
240
241 if (yld->key_code >= 0) {
242 /* old key up */
243 input_report_key(idev, yld->key_code & 0xff, 0);
244 if (yld->key_code >> 8)
245 input_report_key(idev, yld->key_code >> 8, 0);
246 }
247
248 yld->key_code = key;
249 if (key >= 0) {
250 /* new valid key */
251 input_report_key(idev, key & 0xff, 1);
252 if (key >> 8)
253 input_report_key(idev, key >> 8, 1);
254 }
255 input_sync(idev);
256}
257
258/*******************************************************************************
259 * Yealink usb communication interface
260 ******************************************************************************/
261
262static int yealink_cmd(struct yealink_dev *yld, struct yld_ctl_packet *p)
263{
264 u8 *buf = (u8 *)p;
265 int i;
266 u8 sum = 0;
267
268 for(i=0; i<USB_PKT_LEN-1; i++)
269 sum -= buf[i];
270 p->sum = sum;
271 return usb_control_msg(yld->udev,
272 usb_sndctrlpipe(yld->udev, 0),
273 USB_REQ_SET_CONFIGURATION,
274 USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_OUT,
275 0x200, 3,
276 p, sizeof(*p),
277 USB_CTRL_SET_TIMEOUT);
278}
279
280static u8 default_ringtone[] = {
281 0xEF, /* volume [0-255] */
282 0xFB, 0x1E, 0x00, 0x0C, /* 1250 [hz], 12/100 [s] */
283 0xFC, 0x18, 0x00, 0x0C, /* 1000 [hz], 12/100 [s] */
284 0xFB, 0x1E, 0x00, 0x0C,
285 0xFC, 0x18, 0x00, 0x0C,
286 0xFB, 0x1E, 0x00, 0x0C,
287 0xFC, 0x18, 0x00, 0x0C,
288 0xFB, 0x1E, 0x00, 0x0C,
289 0xFC, 0x18, 0x00, 0x0C,
290 0xFF, 0xFF, 0x01, 0x90, /* silent, 400/100 [s] */
291 0x00, 0x00 /* end of sequence */
292};
293
294static int yealink_set_ringtone(struct yealink_dev *yld, u8 *buf, size_t size)
295{
296 struct yld_ctl_packet *p = yld->ctl_data;
297 int ix, len;
298
299 if (size <= 0)
300 return -EINVAL;
301
302 /* Set the ringtone volume */
303 memset(yld->ctl_data, 0, sizeof(*(yld->ctl_data)));
304 yld->ctl_data->cmd = CMD_RING_VOLUME;
305 yld->ctl_data->size = 1;
306 yld->ctl_data->data[0] = buf[0];
307 yealink_cmd(yld, p);
308
309 buf++;
310 size--;
311
312 p->cmd = CMD_RING_NOTE;
313 ix = 0;
314 while (size != ix) {
315 len = size - ix;
316 if (len > sizeof(p->data))
317 len = sizeof(p->data);
318 p->size = len;
319 p->offset = cpu_to_be16(ix);
320 memcpy(p->data, &buf[ix], len);
321 yealink_cmd(yld, p);
322 ix += len;
323 }
324 return 0;
325}
326
327/* keep stat_master & stat_copy in sync.
328 */
329static int yealink_do_idle_tasks(struct yealink_dev *yld)
330{
331 u8 val;
332 int i, ix, len;
333
334 ix = yld->stat_ix;
335
336 memset(yld->ctl_data, 0, sizeof(*(yld->ctl_data)));
337 yld->ctl_data->cmd = CMD_KEYPRESS;
338 yld->ctl_data->size = 1;
339 yld->ctl_data->sum = 0xff - CMD_KEYPRESS;
340
341 /* If state update pointer wraps do a KEYPRESS first. */
342 if (ix >= sizeof(yld->master)) {
343 yld->stat_ix = 0;
344 return 0;
345 }
346
347 /* find update candidates: copy != master */
348 do {
349 val = yld->master.b[ix];
350 if (val != yld->copy.b[ix])
351 goto send_update;
352 } while (++ix < sizeof(yld->master));
353
354 /* nothing todo, wait a bit and poll for a KEYPRESS */
355 yld->stat_ix = 0;
356 /* TODO how can we wait abit. ??
357 * msleep_interruptible(1000 / YEALINK_POLLING_FREQUENCY);
358 */
359 return 0;
360
361send_update:
362
363 /* Setup an appropriate update request */
364 yld->copy.b[ix] = val;
365 yld->ctl_data->data[0] = val;
366
367 switch(ix) {
368 case offsetof(struct yld_status, led):
369 yld->ctl_data->cmd = CMD_LED;
370 yld->ctl_data->sum = -1 - CMD_LED - val;
371 break;
372 case offsetof(struct yld_status, dialtone):
373 yld->ctl_data->cmd = CMD_DIALTONE;
374 yld->ctl_data->sum = -1 - CMD_DIALTONE - val;
375 break;
376 case offsetof(struct yld_status, ringtone):
377 yld->ctl_data->cmd = CMD_RINGTONE;
378 yld->ctl_data->sum = -1 - CMD_RINGTONE - val;
379 break;
380 case offsetof(struct yld_status, keynum):
381 val--;
382 val &= 0x1f;
383 yld->ctl_data->cmd = CMD_SCANCODE;
384 yld->ctl_data->offset = cpu_to_be16(val);
385 yld->ctl_data->data[0] = 0;
386 yld->ctl_data->sum = -1 - CMD_SCANCODE - val;
387 break;
388 default:
389 len = sizeof(yld->master.s.lcd) - ix;
390 if (len > sizeof(yld->ctl_data->data))
391 len = sizeof(yld->ctl_data->data);
392
393 /* Combine up to <len> consecutive LCD bytes in a singe request
394 */
395 yld->ctl_data->cmd = CMD_LCD;
396 yld->ctl_data->offset = cpu_to_be16(ix);
397 yld->ctl_data->size = len;
398 yld->ctl_data->sum = -CMD_LCD - ix - val - len;
399 for(i=1; i<len; i++) {
400 ix++;
401 val = yld->master.b[ix];
402 yld->copy.b[ix] = val;
403 yld->ctl_data->data[i] = val;
404 yld->ctl_data->sum -= val;
405 }
406 }
407 yld->stat_ix = ix + 1;
408 return 1;
409}
410
411/* Decide on how to handle responses
412 *
413 * The state transition diagram is somethhing like:
414 *
415 * syncState<--+
416 * | |
417 * | idle
418 * \|/ |
419 * init --ok--> waitForKey --ok--> getKey
420 * ^ ^ |
421 * | +-------ok-------+
422 * error,start
423 *
424 */
425static void urb_irq_callback(struct urb *urb)
426{
427 struct yealink_dev *yld = urb->context;
428 int ret, status = urb->status;
429
430 if (status)
431 dev_err(&yld->intf->dev, "%s - urb status %d\n",
432 __func__, status);
433
434 switch (yld->irq_data->cmd) {
435 case CMD_KEYPRESS:
436
437 yld->master.s.keynum = yld->irq_data->data[0];
438 break;
439
440 case CMD_SCANCODE:
441 dev_dbg(&yld->intf->dev, "get scancode %x\n",
442 yld->irq_data->data[0]);
443
444 report_key(yld, map_p1k_to_key(yld->irq_data->data[0]));
445 break;
446
447 default:
448 dev_err(&yld->intf->dev, "unexpected response %x\n",
449 yld->irq_data->cmd);
450 }
451
452 yealink_do_idle_tasks(yld);
453
454 if (!yld->shutdown) {
455 ret = usb_submit_urb(yld->urb_ctl, GFP_ATOMIC);
456 if (ret && ret != -EPERM)
457 dev_err(&yld->intf->dev,
458 "%s - usb_submit_urb failed %d\n",
459 __func__, ret);
460 }
461}
462
463static void urb_ctl_callback(struct urb *urb)
464{
465 struct yealink_dev *yld = urb->context;
466 int ret = 0, status = urb->status;
467
468 if (status)
469 dev_err(&yld->intf->dev, "%s - urb status %d\n",
470 __func__, status);
471
472 switch (yld->ctl_data->cmd) {
473 case CMD_KEYPRESS:
474 case CMD_SCANCODE:
475 /* ask for a response */
476 if (!yld->shutdown)
477 ret = usb_submit_urb(yld->urb_irq, GFP_ATOMIC);
478 break;
479 default:
480 /* send new command */
481 yealink_do_idle_tasks(yld);
482 if (!yld->shutdown)
483 ret = usb_submit_urb(yld->urb_ctl, GFP_ATOMIC);
484 break;
485 }
486
487 if (ret && ret != -EPERM)
488 dev_err(&yld->intf->dev, "%s - usb_submit_urb failed %d\n",
489 __func__, ret);
490}
491
492/*******************************************************************************
493 * input event interface
494 ******************************************************************************/
495
496/* TODO should we issue a ringtone on a SND_BELL event?
497static int input_ev(struct input_dev *dev, unsigned int type,
498 unsigned int code, int value)
499{
500
501 if (type != EV_SND)
502 return -EINVAL;
503
504 switch (code) {
505 case SND_BELL:
506 case SND_TONE:
507 break;
508 default:
509 return -EINVAL;
510 }
511
512 return 0;
513}
514*/
515
516static int input_open(struct input_dev *dev)
517{
518 struct yealink_dev *yld = input_get_drvdata(dev);
519 int i, ret;
520
521 dev_dbg(&yld->intf->dev, "%s\n", __func__);
522
523 /* force updates to device */
524 for (i = 0; i<sizeof(yld->master); i++)
525 yld->copy.b[i] = ~yld->master.b[i];
526 yld->key_code = -1; /* no keys pressed */
527
528 yealink_set_ringtone(yld, default_ringtone, sizeof(default_ringtone));
529
530 /* issue INIT */
531 memset(yld->ctl_data, 0, sizeof(*(yld->ctl_data)));
532 yld->ctl_data->cmd = CMD_INIT;
533 yld->ctl_data->size = 10;
534 yld->ctl_data->sum = 0x100-CMD_INIT-10;
535 if ((ret = usb_submit_urb(yld->urb_ctl, GFP_KERNEL)) != 0) {
536 dev_dbg(&yld->intf->dev,
537 "%s - usb_submit_urb failed with result %d\n",
538 __func__, ret);
539 return ret;
540 }
541 return 0;
542}
543
544static void input_close(struct input_dev *dev)
545{
546 struct yealink_dev *yld = input_get_drvdata(dev);
547
548 yld->shutdown = 1;
549 /*
550 * Make sure the flag is seen by other CPUs before we start
551 * killing URBs so new URBs won't be submitted
552 */
553 smp_wmb();
554
555 usb_kill_urb(yld->urb_ctl);
556 usb_kill_urb(yld->urb_irq);
557
558 yld->shutdown = 0;
559 smp_wmb();
560}
561
562/*******************************************************************************
563 * sysfs interface
564 ******************************************************************************/
565
566static DECLARE_RWSEM(sysfs_rwsema);
567
568/* Interface to the 7-segments translation table aka. char set.
569 */
570static ssize_t show_map(struct device *dev, struct device_attribute *attr,
571 char *buf)
572{
573 memcpy(buf, &map_seg7, sizeof(map_seg7));
574 return sizeof(map_seg7);
575}
576
577static ssize_t store_map(struct device *dev, struct device_attribute *attr,
578 const char *buf, size_t cnt)
579{
580 if (cnt != sizeof(map_seg7))
581 return -EINVAL;
582 memcpy(&map_seg7, buf, sizeof(map_seg7));
583 return sizeof(map_seg7);
584}
585
586/* Interface to the LCD.
587 */
588
589/* Reading /sys/../lineX will return the format string with its settings:
590 *
591 * Example:
592 * cat ./line3
593 * 888888888888
594 * Linux Rocks!
595 */
596static ssize_t show_line(struct device *dev, char *buf, int a, int b)
597{
598 struct yealink_dev *yld;
599 int i;
600
601 down_read(&sysfs_rwsema);
602 yld = dev_get_drvdata(dev);
603 if (yld == NULL) {
604 up_read(&sysfs_rwsema);
605 return -ENODEV;
606 }
607
608 for (i = a; i < b; i++)
609 *buf++ = lcdMap[i].type;
610 *buf++ = '\n';
611 for (i = a; i < b; i++)
612 *buf++ = yld->lcdMap[i];
613 *buf++ = '\n';
614 *buf = 0;
615
616 up_read(&sysfs_rwsema);
617 return 3 + ((b - a) << 1);
618}
619
620static ssize_t show_line1(struct device *dev, struct device_attribute *attr,
621 char *buf)
622{
623 return show_line(dev, buf, LCD_LINE1_OFFSET, LCD_LINE2_OFFSET);
624}
625
626static ssize_t show_line2(struct device *dev, struct device_attribute *attr,
627 char *buf)
628{
629 return show_line(dev, buf, LCD_LINE2_OFFSET, LCD_LINE3_OFFSET);
630}
631
632static ssize_t show_line3(struct device *dev, struct device_attribute *attr,
633 char *buf)
634{
635 return show_line(dev, buf, LCD_LINE3_OFFSET, LCD_LINE4_OFFSET);
636}
637
638/* Writing to /sys/../lineX will set the coresponding LCD line.
639 * - Excess characters are ignored.
640 * - If less characters are written than allowed, the remaining digits are
641 * unchanged.
642 * - The '\n' or '\t' char is a placeholder, it does not overwrite the
643 * original content.
644 */
645static ssize_t store_line(struct device *dev, const char *buf, size_t count,
646 int el, size_t len)
647{
648 struct yealink_dev *yld;
649 int i;
650
651 down_write(&sysfs_rwsema);
652 yld = dev_get_drvdata(dev);
653 if (yld == NULL) {
654 up_write(&sysfs_rwsema);
655 return -ENODEV;
656 }
657
658 if (len > count)
659 len = count;
660 for (i = 0; i < len; i++)
661 setChar(yld, el++, buf[i]);
662
663 up_write(&sysfs_rwsema);
664 return count;
665}
666
667static ssize_t store_line1(struct device *dev, struct device_attribute *attr,
668 const char *buf, size_t count)
669{
670 return store_line(dev, buf, count, LCD_LINE1_OFFSET, LCD_LINE1_SIZE);
671}
672
673static ssize_t store_line2(struct device *dev, struct device_attribute *attr,
674 const char *buf, size_t count)
675{
676 return store_line(dev, buf, count, LCD_LINE2_OFFSET, LCD_LINE2_SIZE);
677}
678
679static ssize_t store_line3(struct device *dev, struct device_attribute *attr,
680 const char *buf, size_t count)
681{
682 return store_line(dev, buf, count, LCD_LINE3_OFFSET, LCD_LINE3_SIZE);
683}
684
685/* Interface to visible and audible "icons", these include:
686 * pictures on the LCD, the LED, and the dialtone signal.
687 */
688
689/* Get a list of "switchable elements" with their current state. */
690static ssize_t get_icons(struct device *dev, struct device_attribute *attr,
691 char *buf)
692{
693 struct yealink_dev *yld;
694 int i, ret = 1;
695
696 down_read(&sysfs_rwsema);
697 yld = dev_get_drvdata(dev);
698 if (yld == NULL) {
699 up_read(&sysfs_rwsema);
700 return -ENODEV;
701 }
702
703 for (i = 0; i < ARRAY_SIZE(lcdMap); i++) {
704 if (lcdMap[i].type != '.')
705 continue;
706 ret += sprintf(&buf[ret], "%s %s\n",
707 yld->lcdMap[i] == ' ' ? " " : "on",
708 lcdMap[i].u.p.name);
709 }
710 up_read(&sysfs_rwsema);
711 return ret;
712}
713
714/* Change the visibility of a particular element. */
715static ssize_t set_icon(struct device *dev, const char *buf, size_t count,
716 int chr)
717{
718 struct yealink_dev *yld;
719 int i;
720
721 down_write(&sysfs_rwsema);
722 yld = dev_get_drvdata(dev);
723 if (yld == NULL) {
724 up_write(&sysfs_rwsema);
725 return -ENODEV;
726 }
727
728 for (i = 0; i < ARRAY_SIZE(lcdMap); i++) {
729 if (lcdMap[i].type != '.')
730 continue;
731 if (strncmp(buf, lcdMap[i].u.p.name, count) == 0) {
732 setChar(yld, i, chr);
733 break;
734 }
735 }
736
737 up_write(&sysfs_rwsema);
738 return count;
739}
740
741static ssize_t show_icon(struct device *dev, struct device_attribute *attr,
742 const char *buf, size_t count)
743{
744 return set_icon(dev, buf, count, buf[0]);
745}
746
747static ssize_t hide_icon(struct device *dev, struct device_attribute *attr,
748 const char *buf, size_t count)
749{
750 return set_icon(dev, buf, count, ' ');
751}
752
753/* Upload a ringtone to the device.
754 */
755
756/* Stores raw ringtone data in the phone */
757static ssize_t store_ringtone(struct device *dev,
758 struct device_attribute *attr,
759 const char *buf, size_t count)
760{
761 struct yealink_dev *yld;
762
763 down_write(&sysfs_rwsema);
764 yld = dev_get_drvdata(dev);
765 if (yld == NULL) {
766 up_write(&sysfs_rwsema);
767 return -ENODEV;
768 }
769
770 /* TODO locking with async usb control interface??? */
771 yealink_set_ringtone(yld, (char *)buf, count);
772 up_write(&sysfs_rwsema);
773 return count;
774}
775
776#define _M444 S_IRUGO
777#define _M664 S_IRUGO|S_IWUSR|S_IWGRP
778#define _M220 S_IWUSR|S_IWGRP
779
780static DEVICE_ATTR(map_seg7 , _M664, show_map , store_map );
781static DEVICE_ATTR(line1 , _M664, show_line1 , store_line1 );
782static DEVICE_ATTR(line2 , _M664, show_line2 , store_line2 );
783static DEVICE_ATTR(line3 , _M664, show_line3 , store_line3 );
784static DEVICE_ATTR(get_icons , _M444, get_icons , NULL );
785static DEVICE_ATTR(show_icon , _M220, NULL , show_icon );
786static DEVICE_ATTR(hide_icon , _M220, NULL , hide_icon );
787static DEVICE_ATTR(ringtone , _M220, NULL , store_ringtone);
788
789static struct attribute *yld_attributes[] = {
790 &dev_attr_line1.attr,
791 &dev_attr_line2.attr,
792 &dev_attr_line3.attr,
793 &dev_attr_get_icons.attr,
794 &dev_attr_show_icon.attr,
795 &dev_attr_hide_icon.attr,
796 &dev_attr_map_seg7.attr,
797 &dev_attr_ringtone.attr,
798 NULL
799};
800
801static struct attribute_group yld_attr_group = {
802 .attrs = yld_attributes
803};
804
805/*******************************************************************************
806 * Linux interface and usb initialisation
807 ******************************************************************************/
808
809struct driver_info {
810 char *name;
811};
812
813static const struct driver_info info_P1K = {
814 .name = "Yealink usb-p1k",
815};
816
817static const struct usb_device_id usb_table [] = {
818 {
819 .match_flags = USB_DEVICE_ID_MATCH_DEVICE |
820 USB_DEVICE_ID_MATCH_INT_INFO,
821 .idVendor = 0x6993,
822 .idProduct = 0xb001,
823 .bInterfaceClass = USB_CLASS_HID,
824 .bInterfaceSubClass = 0,
825 .bInterfaceProtocol = 0,
826 .driver_info = (kernel_ulong_t)&info_P1K
827 },
828 { }
829};
830
831static int usb_cleanup(struct yealink_dev *yld, int err)
832{
833 if (yld == NULL)
834 return err;
835
836 if (yld->idev) {
837 if (err)
838 input_free_device(yld->idev);
839 else
840 input_unregister_device(yld->idev);
841 }
842
843 usb_free_urb(yld->urb_irq);
844 usb_free_urb(yld->urb_ctl);
845
846 kfree(yld->ctl_req);
847 usb_free_coherent(yld->udev, USB_PKT_LEN, yld->ctl_data, yld->ctl_dma);
848 usb_free_coherent(yld->udev, USB_PKT_LEN, yld->irq_data, yld->irq_dma);
849
850 kfree(yld);
851 return err;
852}
853
854static void usb_disconnect(struct usb_interface *intf)
855{
856 struct yealink_dev *yld;
857
858 down_write(&sysfs_rwsema);
859 yld = usb_get_intfdata(intf);
860 sysfs_remove_group(&intf->dev.kobj, &yld_attr_group);
861 usb_set_intfdata(intf, NULL);
862 up_write(&sysfs_rwsema);
863
864 usb_cleanup(yld, 0);
865}
866
867static int usb_probe(struct usb_interface *intf, const struct usb_device_id *id)
868{
869 struct usb_device *udev = interface_to_usbdev (intf);
870 struct driver_info *nfo = (struct driver_info *)id->driver_info;
871 struct usb_host_interface *interface;
872 struct usb_endpoint_descriptor *endpoint;
873 struct yealink_dev *yld;
874 struct input_dev *input_dev;
875 int ret, pipe, i;
876
877 interface = intf->cur_altsetting;
878 endpoint = &interface->endpoint[0].desc;
879 if (!usb_endpoint_is_int_in(endpoint))
880 return -ENODEV;
881
882 yld = kzalloc(sizeof(struct yealink_dev), GFP_KERNEL);
883 if (!yld)
884 return -ENOMEM;
885
886 yld->udev = udev;
887 yld->intf = intf;
888
889 yld->idev = input_dev = input_allocate_device();
890 if (!input_dev)
891 return usb_cleanup(yld, -ENOMEM);
892
893 /* allocate usb buffers */
894 yld->irq_data = usb_alloc_coherent(udev, USB_PKT_LEN,
895 GFP_ATOMIC, &yld->irq_dma);
896 if (yld->irq_data == NULL)
897 return usb_cleanup(yld, -ENOMEM);
898
899 yld->ctl_data = usb_alloc_coherent(udev, USB_PKT_LEN,
900 GFP_ATOMIC, &yld->ctl_dma);
901 if (!yld->ctl_data)
902 return usb_cleanup(yld, -ENOMEM);
903
904 yld->ctl_req = kmalloc(sizeof(*(yld->ctl_req)), GFP_KERNEL);
905 if (yld->ctl_req == NULL)
906 return usb_cleanup(yld, -ENOMEM);
907
908 /* allocate urb structures */
909 yld->urb_irq = usb_alloc_urb(0, GFP_KERNEL);
910 if (yld->urb_irq == NULL)
911 return usb_cleanup(yld, -ENOMEM);
912
913 yld->urb_ctl = usb_alloc_urb(0, GFP_KERNEL);
914 if (yld->urb_ctl == NULL)
915 return usb_cleanup(yld, -ENOMEM);
916
917 /* get a handle to the interrupt data pipe */
918 pipe = usb_rcvintpipe(udev, endpoint->bEndpointAddress);
919 ret = usb_maxpacket(udev, pipe, usb_pipeout(pipe));
920 if (ret != USB_PKT_LEN)
921 dev_err(&intf->dev, "invalid payload size %d, expected %zd\n",
922 ret, USB_PKT_LEN);
923
924 /* initialise irq urb */
925 usb_fill_int_urb(yld->urb_irq, udev, pipe, yld->irq_data,
926 USB_PKT_LEN,
927 urb_irq_callback,
928 yld, endpoint->bInterval);
929 yld->urb_irq->transfer_dma = yld->irq_dma;
930 yld->urb_irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
931 yld->urb_irq->dev = udev;
932
933 /* initialise ctl urb */
934 yld->ctl_req->bRequestType = USB_TYPE_CLASS | USB_RECIP_INTERFACE |
935 USB_DIR_OUT;
936 yld->ctl_req->bRequest = USB_REQ_SET_CONFIGURATION;
937 yld->ctl_req->wValue = cpu_to_le16(0x200);
938 yld->ctl_req->wIndex = cpu_to_le16(interface->desc.bInterfaceNumber);
939 yld->ctl_req->wLength = cpu_to_le16(USB_PKT_LEN);
940
941 usb_fill_control_urb(yld->urb_ctl, udev, usb_sndctrlpipe(udev, 0),
942 (void *)yld->ctl_req, yld->ctl_data, USB_PKT_LEN,
943 urb_ctl_callback, yld);
944 yld->urb_ctl->transfer_dma = yld->ctl_dma;
945 yld->urb_ctl->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
946 yld->urb_ctl->dev = udev;
947
948 /* find out the physical bus location */
949 usb_make_path(udev, yld->phys, sizeof(yld->phys));
950 strlcat(yld->phys, "/input0", sizeof(yld->phys));
951
952 /* register settings for the input device */
953 input_dev->name = nfo->name;
954 input_dev->phys = yld->phys;
955 usb_to_input_id(udev, &input_dev->id);
956 input_dev->dev.parent = &intf->dev;
957
958 input_set_drvdata(input_dev, yld);
959
960 input_dev->open = input_open;
961 input_dev->close = input_close;
962 /* input_dev->event = input_ev; TODO */
963
964 /* register available key events */
965 input_dev->evbit[0] = BIT_MASK(EV_KEY);
966 for (i = 0; i < 256; i++) {
967 int k = map_p1k_to_key(i);
968 if (k >= 0) {
969 set_bit(k & 0xff, input_dev->keybit);
970 if (k >> 8)
971 set_bit(k >> 8, input_dev->keybit);
972 }
973 }
974
975 ret = input_register_device(yld->idev);
976 if (ret)
977 return usb_cleanup(yld, ret);
978
979 usb_set_intfdata(intf, yld);
980
981 /* clear visible elements */
982 for (i = 0; i < ARRAY_SIZE(lcdMap); i++)
983 setChar(yld, i, ' ');
984
985 /* display driver version on LCD line 3 */
986 store_line3(&intf->dev, NULL,
987 DRIVER_VERSION, sizeof(DRIVER_VERSION));
988
989 /* Register sysfs hooks (don't care about failure) */
990 ret = sysfs_create_group(&intf->dev.kobj, &yld_attr_group);
991 return 0;
992}
993
994static struct usb_driver yealink_driver = {
995 .name = "yealink",
996 .probe = usb_probe,
997 .disconnect = usb_disconnect,
998 .id_table = usb_table,
999};
1000
1001module_usb_driver(yealink_driver);
1002
1003MODULE_DEVICE_TABLE (usb, usb_table);
1004
1005MODULE_AUTHOR(DRIVER_AUTHOR);
1006MODULE_DESCRIPTION(DRIVER_DESC);
1007MODULE_LICENSE("GPL");