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
64 struct 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
85 static 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
100 struct 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 */
138 static 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 */
setChar(struct yealink_dev * yld,int el,int chr)144 static 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 */
map_p1k_to_key(int scancode)205 static 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 */
report_key(struct yealink_dev * yld,int key)237 static 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
yealink_cmd(struct yealink_dev * yld,struct yld_ctl_packet * p)262 static 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
280 static 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
yealink_set_ringtone(struct yealink_dev * yld,u8 * buf,size_t size)294 static 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 */
yealink_do_idle_tasks(struct yealink_dev * yld)329 static 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
361 send_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 */
urb_irq_callback(struct urb * urb)425 static 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
urb_ctl_callback(struct urb * urb)463 static 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?
497 static 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
input_open(struct input_dev * dev)516 static 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
input_close(struct input_dev * dev)544 static 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
566 static DECLARE_RWSEM(sysfs_rwsema);
567
568 /* Interface to the 7-segments translation table aka. char set.
569 */
show_map(struct device * dev,struct device_attribute * attr,char * buf)570 static 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
store_map(struct device * dev,struct device_attribute * attr,const char * buf,size_t cnt)577 static 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 */
show_line(struct device * dev,char * buf,int a,int b)596 static 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
show_line1(struct device * dev,struct device_attribute * attr,char * buf)620 static 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
show_line2(struct device * dev,struct device_attribute * attr,char * buf)626 static 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
show_line3(struct device * dev,struct device_attribute * attr,char * buf)632 static 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 */
store_line(struct device * dev,const char * buf,size_t count,int el,size_t len)645 static 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
store_line1(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)667 static 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
store_line2(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)673 static 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
store_line3(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)679 static 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. */
get_icons(struct device * dev,struct device_attribute * attr,char * buf)690 static 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. */
set_icon(struct device * dev,const char * buf,size_t count,int chr)715 static 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
show_icon(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)741 static 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
hide_icon(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)747 static 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 */
store_ringtone(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)757 static 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
780 static DEVICE_ATTR(map_seg7 , _M664, show_map , store_map );
781 static DEVICE_ATTR(line1 , _M664, show_line1 , store_line1 );
782 static DEVICE_ATTR(line2 , _M664, show_line2 , store_line2 );
783 static DEVICE_ATTR(line3 , _M664, show_line3 , store_line3 );
784 static DEVICE_ATTR(get_icons , _M444, get_icons , NULL );
785 static DEVICE_ATTR(show_icon , _M220, NULL , show_icon );
786 static DEVICE_ATTR(hide_icon , _M220, NULL , hide_icon );
787 static DEVICE_ATTR(ringtone , _M220, NULL , store_ringtone);
788
789 static 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
801 static struct attribute_group yld_attr_group = {
802 .attrs = yld_attributes
803 };
804
805 /*******************************************************************************
806 * Linux interface and usb initialisation
807 ******************************************************************************/
808
809 struct driver_info {
810 char *name;
811 };
812
813 static const struct driver_info info_P1K = {
814 .name = "Yealink usb-p1k",
815 };
816
817 static 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
usb_cleanup(struct yealink_dev * yld,int err)831 static 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
usb_disconnect(struct usb_interface * intf)854 static 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
usb_probe(struct usb_interface * intf,const struct usb_device_id * id)867 static 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
879 if (interface->desc.bNumEndpoints < 1)
880 return -ENODEV;
881
882 endpoint = &interface->endpoint[0].desc;
883 if (!usb_endpoint_is_int_in(endpoint))
884 return -ENODEV;
885
886 yld = kzalloc(sizeof(struct yealink_dev), GFP_KERNEL);
887 if (!yld)
888 return -ENOMEM;
889
890 yld->udev = udev;
891 yld->intf = intf;
892
893 yld->idev = input_dev = input_allocate_device();
894 if (!input_dev)
895 return usb_cleanup(yld, -ENOMEM);
896
897 /* allocate usb buffers */
898 yld->irq_data = usb_alloc_coherent(udev, USB_PKT_LEN,
899 GFP_ATOMIC, &yld->irq_dma);
900 if (yld->irq_data == NULL)
901 return usb_cleanup(yld, -ENOMEM);
902
903 yld->ctl_data = usb_alloc_coherent(udev, USB_PKT_LEN,
904 GFP_ATOMIC, &yld->ctl_dma);
905 if (!yld->ctl_data)
906 return usb_cleanup(yld, -ENOMEM);
907
908 yld->ctl_req = kmalloc(sizeof(*(yld->ctl_req)), GFP_KERNEL);
909 if (yld->ctl_req == NULL)
910 return usb_cleanup(yld, -ENOMEM);
911
912 /* allocate urb structures */
913 yld->urb_irq = usb_alloc_urb(0, GFP_KERNEL);
914 if (yld->urb_irq == NULL)
915 return usb_cleanup(yld, -ENOMEM);
916
917 yld->urb_ctl = usb_alloc_urb(0, GFP_KERNEL);
918 if (yld->urb_ctl == NULL)
919 return usb_cleanup(yld, -ENOMEM);
920
921 /* get a handle to the interrupt data pipe */
922 pipe = usb_rcvintpipe(udev, endpoint->bEndpointAddress);
923 ret = usb_maxpacket(udev, pipe, usb_pipeout(pipe));
924 if (ret != USB_PKT_LEN)
925 dev_err(&intf->dev, "invalid payload size %d, expected %zd\n",
926 ret, USB_PKT_LEN);
927
928 /* initialise irq urb */
929 usb_fill_int_urb(yld->urb_irq, udev, pipe, yld->irq_data,
930 USB_PKT_LEN,
931 urb_irq_callback,
932 yld, endpoint->bInterval);
933 yld->urb_irq->transfer_dma = yld->irq_dma;
934 yld->urb_irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
935 yld->urb_irq->dev = udev;
936
937 /* initialise ctl urb */
938 yld->ctl_req->bRequestType = USB_TYPE_CLASS | USB_RECIP_INTERFACE |
939 USB_DIR_OUT;
940 yld->ctl_req->bRequest = USB_REQ_SET_CONFIGURATION;
941 yld->ctl_req->wValue = cpu_to_le16(0x200);
942 yld->ctl_req->wIndex = cpu_to_le16(interface->desc.bInterfaceNumber);
943 yld->ctl_req->wLength = cpu_to_le16(USB_PKT_LEN);
944
945 usb_fill_control_urb(yld->urb_ctl, udev, usb_sndctrlpipe(udev, 0),
946 (void *)yld->ctl_req, yld->ctl_data, USB_PKT_LEN,
947 urb_ctl_callback, yld);
948 yld->urb_ctl->transfer_dma = yld->ctl_dma;
949 yld->urb_ctl->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
950 yld->urb_ctl->dev = udev;
951
952 /* find out the physical bus location */
953 usb_make_path(udev, yld->phys, sizeof(yld->phys));
954 strlcat(yld->phys, "/input0", sizeof(yld->phys));
955
956 /* register settings for the input device */
957 input_dev->name = nfo->name;
958 input_dev->phys = yld->phys;
959 usb_to_input_id(udev, &input_dev->id);
960 input_dev->dev.parent = &intf->dev;
961
962 input_set_drvdata(input_dev, yld);
963
964 input_dev->open = input_open;
965 input_dev->close = input_close;
966 /* input_dev->event = input_ev; TODO */
967
968 /* register available key events */
969 input_dev->evbit[0] = BIT_MASK(EV_KEY);
970 for (i = 0; i < 256; i++) {
971 int k = map_p1k_to_key(i);
972 if (k >= 0) {
973 set_bit(k & 0xff, input_dev->keybit);
974 if (k >> 8)
975 set_bit(k >> 8, input_dev->keybit);
976 }
977 }
978
979 ret = input_register_device(yld->idev);
980 if (ret)
981 return usb_cleanup(yld, ret);
982
983 usb_set_intfdata(intf, yld);
984
985 /* clear visible elements */
986 for (i = 0; i < ARRAY_SIZE(lcdMap); i++)
987 setChar(yld, i, ' ');
988
989 /* display driver version on LCD line 3 */
990 store_line3(&intf->dev, NULL,
991 DRIVER_VERSION, sizeof(DRIVER_VERSION));
992
993 /* Register sysfs hooks (don't care about failure) */
994 ret = sysfs_create_group(&intf->dev.kobj, &yld_attr_group);
995 return 0;
996 }
997
998 static struct usb_driver yealink_driver = {
999 .name = "yealink",
1000 .probe = usb_probe,
1001 .disconnect = usb_disconnect,
1002 .id_table = usb_table,
1003 };
1004
1005 module_usb_driver(yealink_driver);
1006
1007 MODULE_DEVICE_TABLE (usb, usb_table);
1008
1009 MODULE_AUTHOR(DRIVER_AUTHOR);
1010 MODULE_DESCRIPTION(DRIVER_DESC);
1011 MODULE_LICENSE("GPL");
1012