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treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / drivers / input / misc / yealink.c
blob8ab01c7601b1204960f541ed499cc7103726545f
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/rwsem.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
49 struct 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
70 static 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
85 struct 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 unsigned int shutdown:1;
107
108 int stat_ix;
109 union {
110 struct yld_status s;
111 u8 b[sizeof(struct yld_status)];
112 } master, copy;
113 };
114
115
116 /*******************************************************************************
117 * Yealink lcd interface
118 ******************************************************************************/
119
120 /*
121 * Register a default 7 segment character set
122 */
123 static SEG7_DEFAULT_MAP(map_seg7);
124
125 /* Display a char,
126 * char '\9' and '\n' are placeholders and do not overwrite the original text.
127 * A space will always hide an icon.
128 */
129 static int setChar(struct yealink_dev *yld, int el, int chr)
130 {
131 int i, a, m, val;
132
133 if (el >= ARRAY_SIZE(lcdMap))
134 return -EINVAL;
135
136 if (chr == '\t' || chr == '\n')
137 return 0;
138
139 yld->lcdMap[el] = chr;
140
141 if (lcdMap[el].type == '.') {
142 a = lcdMap[el].u.p.a;
143 m = lcdMap[el].u.p.m;
144 if (chr != ' ')
145 yld->master.b[a] |= m;
146 else
147 yld->master.b[a] &= ~m;
148 return 0;
149 }
150
151 val = map_to_seg7(&map_seg7, chr);
152 for (i = 0; i < ARRAY_SIZE(lcdMap[0].u.s); i++) {
153 m = lcdMap[el].u.s[i].m;
154
155 if (m == 0)
156 continue;
157
158 a = lcdMap[el].u.s[i].a;
159 if (val & 1)
160 yld->master.b[a] |= m;
161 else
162 yld->master.b[a] &= ~m;
163 val = val >> 1;
164 }
165 return 0;
166 };
167
168 /*******************************************************************************
169 * Yealink key interface
170 ******************************************************************************/
171
172 /* Map device buttons to internal key events.
173 *
174 * USB-P1K button layout:
175 *
176 * up
177 * IN OUT
178 * down
179 *
180 * pickup C hangup
181 * 1 2 3
182 * 4 5 6
183 * 7 8 9
184 * * 0 #
185 *
186 * The "up" and "down" keys, are symbolised by arrows on the button.
187 * The "pickup" and "hangup" keys are symbolised by a green and red phone
188 * on the button.
189 */
190 static int map_p1k_to_key(int scancode)
191 {
192 switch(scancode) { /* phone key: */
193 case 0x23: return KEY_LEFT; /* IN */
194 case 0x33: return KEY_UP; /* up */
195 case 0x04: return KEY_RIGHT; /* OUT */
196 case 0x24: return KEY_DOWN; /* down */
197 case 0x03: return KEY_ENTER; /* pickup */
198 case 0x14: return KEY_BACKSPACE; /* C */
199 case 0x13: return KEY_ESC; /* hangup */
200 case 0x00: return KEY_1; /* 1 */
201 case 0x01: return KEY_2; /* 2 */
202 case 0x02: return KEY_3; /* 3 */
203 case 0x10: return KEY_4; /* 4 */
204 case 0x11: return KEY_5; /* 5 */
205 case 0x12: return KEY_6; /* 6 */
206 case 0x20: return KEY_7; /* 7 */
207 case 0x21: return KEY_8; /* 8 */
208 case 0x22: return KEY_9; /* 9 */
209 case 0x30: return KEY_KPASTERISK; /* * */
210 case 0x31: return KEY_0; /* 0 */
211 case 0x32: return KEY_LEFTSHIFT |
212 KEY_3 << 8; /* # */
213 }
214 return -EINVAL;
215 }
216
217 /* Completes a request by converting the data into events for the
218 * input subsystem.
219 *
220 * The key parameter can be cascaded: key2 << 8 | key1
221 */
222 static void report_key(struct yealink_dev *yld, int key)
223 {
224 struct input_dev *idev = yld->idev;
225
226 if (yld->key_code >= 0) {
227 /* old key up */
228 input_report_key(idev, yld->key_code & 0xff, 0);
229 if (yld->key_code >> 8)
230 input_report_key(idev, yld->key_code >> 8, 0);
231 }
232
233 yld->key_code = key;
234 if (key >= 0) {
235 /* new valid key */
236 input_report_key(idev, key & 0xff, 1);
237 if (key >> 8)
238 input_report_key(idev, key >> 8, 1);
239 }
240 input_sync(idev);
241 }
242
243 /*******************************************************************************
244 * Yealink usb communication interface
245 ******************************************************************************/
246
247 static int yealink_cmd(struct yealink_dev *yld, struct yld_ctl_packet *p)
248 {
249 u8 *buf = (u8 *)p;
250 int i;
251 u8 sum = 0;
252
253 for(i=0; i<USB_PKT_LEN-1; i++)
254 sum -= buf[i];
255 p->sum = sum;
256 return usb_control_msg(yld->udev,
257 usb_sndctrlpipe(yld->udev, 0),
258 USB_REQ_SET_CONFIGURATION,
259 USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_OUT,
260 0x200, 3,
261 p, sizeof(*p),
262 USB_CTRL_SET_TIMEOUT);
263 }
264
265 static u8 default_ringtone[] = {
266 0xEF, /* volume [0-255] */
267 0xFB, 0x1E, 0x00, 0x0C, /* 1250 [hz], 12/100 [s] */
268 0xFC, 0x18, 0x00, 0x0C, /* 1000 [hz], 12/100 [s] */
269 0xFB, 0x1E, 0x00, 0x0C,
270 0xFC, 0x18, 0x00, 0x0C,
271 0xFB, 0x1E, 0x00, 0x0C,
272 0xFC, 0x18, 0x00, 0x0C,
273 0xFB, 0x1E, 0x00, 0x0C,
274 0xFC, 0x18, 0x00, 0x0C,
275 0xFF, 0xFF, 0x01, 0x90, /* silent, 400/100 [s] */
276 0x00, 0x00 /* end of sequence */
277 };
278
279 static int yealink_set_ringtone(struct yealink_dev *yld, u8 *buf, size_t size)
280 {
281 struct yld_ctl_packet *p = yld->ctl_data;
282 int ix, len;
283
284 if (size <= 0)
285 return -EINVAL;
286
287 /* Set the ringtone volume */
288 memset(yld->ctl_data, 0, sizeof(*(yld->ctl_data)));
289 yld->ctl_data->cmd = CMD_RING_VOLUME;
290 yld->ctl_data->size = 1;
291 yld->ctl_data->data[0] = buf[0];
292 yealink_cmd(yld, p);
293
294 buf++;
295 size--;
296
297 p->cmd = CMD_RING_NOTE;
298 ix = 0;
299 while (size != ix) {
300 len = size - ix;
301 if (len > sizeof(p->data))
302 len = sizeof(p->data);
303 p->size = len;
304 p->offset = cpu_to_be16(ix);
305 memcpy(p->data, &buf[ix], len);
306 yealink_cmd(yld, p);
307 ix += len;
308 }
309 return 0;
310 }
311
312 /* keep stat_master & stat_copy in sync.
313 */
314 static int yealink_do_idle_tasks(struct yealink_dev *yld)
315 {
316 u8 val;
317 int i, ix, len;
318
319 ix = yld->stat_ix;
320
321 memset(yld->ctl_data, 0, sizeof(*(yld->ctl_data)));
322 yld->ctl_data->cmd = CMD_KEYPRESS;
323 yld->ctl_data->size = 1;
324 yld->ctl_data->sum = 0xff - CMD_KEYPRESS;
325
326 /* If state update pointer wraps do a KEYPRESS first. */
327 if (ix >= sizeof(yld->master)) {
328 yld->stat_ix = 0;
329 return 0;
330 }
331
332 /* find update candidates: copy != master */
333 do {
334 val = yld->master.b[ix];
335 if (val != yld->copy.b[ix])
336 goto send_update;
337 } while (++ix < sizeof(yld->master));
338
339 /* nothing todo, wait a bit and poll for a KEYPRESS */
340 yld->stat_ix = 0;
341 /* TODO how can we wait abit. ??
342 * msleep_interruptible(1000 / YEALINK_POLLING_FREQUENCY);
343 */
344 return 0;
345
346 send_update:
347
348 /* Setup an appropriate update request */
349 yld->copy.b[ix] = val;
350 yld->ctl_data->data[0] = val;
351
352 switch(ix) {
353 case offsetof(struct yld_status, led):
354 yld->ctl_data->cmd = CMD_LED;
355 yld->ctl_data->sum = -1 - CMD_LED - val;
356 break;
357 case offsetof(struct yld_status, dialtone):
358 yld->ctl_data->cmd = CMD_DIALTONE;
359 yld->ctl_data->sum = -1 - CMD_DIALTONE - val;
360 break;
361 case offsetof(struct yld_status, ringtone):
362 yld->ctl_data->cmd = CMD_RINGTONE;
363 yld->ctl_data->sum = -1 - CMD_RINGTONE - val;
364 break;
365 case offsetof(struct yld_status, keynum):
366 val--;
367 val &= 0x1f;
368 yld->ctl_data->cmd = CMD_SCANCODE;
369 yld->ctl_data->offset = cpu_to_be16(val);
370 yld->ctl_data->data[0] = 0;
371 yld->ctl_data->sum = -1 - CMD_SCANCODE - val;
372 break;
373 default:
374 len = sizeof(yld->master.s.lcd) - ix;
375 if (len > sizeof(yld->ctl_data->data))
376 len = sizeof(yld->ctl_data->data);
377
378 /* Combine up to <len> consecutive LCD bytes in a singe request
379 */
380 yld->ctl_data->cmd = CMD_LCD;
381 yld->ctl_data->offset = cpu_to_be16(ix);
382 yld->ctl_data->size = len;
383 yld->ctl_data->sum = -CMD_LCD - ix - val - len;
384 for(i=1; i<len; i++) {
385 ix++;
386 val = yld->master.b[ix];
387 yld->copy.b[ix] = val;
388 yld->ctl_data->data[i] = val;
389 yld->ctl_data->sum -= val;
390 }
391 }
392 yld->stat_ix = ix + 1;
393 return 1;
394 }
395
396 /* Decide on how to handle responses
397 *
398 * The state transition diagram is somethhing like:
399 *
400 * syncState<--+
401 * | |
402 * | idle
403 * \|/ |
404 * init --ok--> waitForKey --ok--> getKey
405 * ^ ^ |
406 * | +-------ok-------+
407 * error,start
408 *
409 */
410 static void urb_irq_callback(struct urb *urb)
411 {
412 struct yealink_dev *yld = urb->context;
413 int ret, status = urb->status;
414
415 if (status)
416 dev_err(&yld->intf->dev, "%s - urb status %d\n",
417 __func__, status);
418
419 switch (yld->irq_data->cmd) {
420 case CMD_KEYPRESS:
421
422 yld->master.s.keynum = yld->irq_data->data[0];
423 break;
424
425 case CMD_SCANCODE:
426 dev_dbg(&yld->intf->dev, "get scancode %x\n",
427 yld->irq_data->data[0]);
428
429 report_key(yld, map_p1k_to_key(yld->irq_data->data[0]));
430 break;
431
432 default:
433 dev_err(&yld->intf->dev, "unexpected response %x\n",
434 yld->irq_data->cmd);
435 }
436
437 yealink_do_idle_tasks(yld);
438
439 if (!yld->shutdown) {
440 ret = usb_submit_urb(yld->urb_ctl, GFP_ATOMIC);
441 if (ret && ret != -EPERM)
442 dev_err(&yld->intf->dev,
443 "%s - usb_submit_urb failed %d\n",
444 __func__, ret);
445 }
446 }
447
448 static void urb_ctl_callback(struct urb *urb)
449 {
450 struct yealink_dev *yld = urb->context;
451 int ret = 0, status = urb->status;
452
453 if (status)
454 dev_err(&yld->intf->dev, "%s - urb status %d\n",
455 __func__, status);
456
457 switch (yld->ctl_data->cmd) {
458 case CMD_KEYPRESS:
459 case CMD_SCANCODE:
460 /* ask for a response */
461 if (!yld->shutdown)
462 ret = usb_submit_urb(yld->urb_irq, GFP_ATOMIC);
463 break;
464 default:
465 /* send new command */
466 yealink_do_idle_tasks(yld);
467 if (!yld->shutdown)
468 ret = usb_submit_urb(yld->urb_ctl, GFP_ATOMIC);
469 break;
470 }
471
472 if (ret && ret != -EPERM)
473 dev_err(&yld->intf->dev, "%s - usb_submit_urb failed %d\n",
474 __func__, ret);
475 }
476
477 /*******************************************************************************
478 * input event interface
479 ******************************************************************************/
480
481 /* TODO should we issue a ringtone on a SND_BELL event?
482 static int input_ev(struct input_dev *dev, unsigned int type,
483 unsigned int code, int value)
484 {
485
486 if (type != EV_SND)
487 return -EINVAL;
488
489 switch (code) {
490 case SND_BELL:
491 case SND_TONE:
492 break;
493 default:
494 return -EINVAL;
495 }
496
497 return 0;
498 }
499 */
500
501 static int input_open(struct input_dev *dev)
502 {
503 struct yealink_dev *yld = input_get_drvdata(dev);
504 int i, ret;
505
506 dev_dbg(&yld->intf->dev, "%s\n", __func__);
507
508 /* force updates to device */
509 for (i = 0; i<sizeof(yld->master); i++)
510 yld->copy.b[i] = ~yld->master.b[i];
511 yld->key_code = -1; /* no keys pressed */
512
513 yealink_set_ringtone(yld, default_ringtone, sizeof(default_ringtone));
514
515 /* issue INIT */
516 memset(yld->ctl_data, 0, sizeof(*(yld->ctl_data)));
517 yld->ctl_data->cmd = CMD_INIT;
518 yld->ctl_data->size = 10;
519 yld->ctl_data->sum = 0x100-CMD_INIT-10;
520 if ((ret = usb_submit_urb(yld->urb_ctl, GFP_KERNEL)) != 0) {
521 dev_dbg(&yld->intf->dev,
522 "%s - usb_submit_urb failed with result %d\n",
523 __func__, ret);
524 return ret;
525 }
526 return 0;
527 }
528
529 static void input_close(struct input_dev *dev)
530 {
531 struct yealink_dev *yld = input_get_drvdata(dev);
532
533 yld->shutdown = 1;
534 /*
535 * Make sure the flag is seen by other CPUs before we start
536 * killing URBs so new URBs won't be submitted
537 */
538 smp_wmb();
539
540 usb_kill_urb(yld->urb_ctl);
541 usb_kill_urb(yld->urb_irq);
542
543 yld->shutdown = 0;
544 smp_wmb();
545 }
546
547 /*******************************************************************************
548 * sysfs interface
549 ******************************************************************************/
550
551 static DECLARE_RWSEM(sysfs_rwsema);
552
553 /* Interface to the 7-segments translation table aka. char set.
554 */
555 static 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
562 static 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 */
581 static ssize_t show_line(struct device *dev, char *buf, int a, int b)
582 {
583 struct yealink_dev *yld;
584 int i;
585
586 down_read(&sysfs_rwsema);
587 yld = dev_get_drvdata(dev);
588 if (yld == NULL) {
589 up_read(&sysfs_rwsema);
590 return -ENODEV;
591 }
592
593 for (i = a; i < b; i++)
594 *buf++ = lcdMap[i].type;
595 *buf++ = '\n';
596 for (i = a; i < b; i++)
597 *buf++ = yld->lcdMap[i];
598 *buf++ = '\n';
599 *buf = 0;
600
601 up_read(&sysfs_rwsema);
602 return 3 + ((b - a) << 1);
603 }
604
605 static ssize_t show_line1(struct device *dev, struct device_attribute *attr,
606 char *buf)
607 {
608 return show_line(dev, buf, LCD_LINE1_OFFSET, LCD_LINE2_OFFSET);
609 }
610
611 static ssize_t show_line2(struct device *dev, struct device_attribute *attr,
612 char *buf)
613 {
614 return show_line(dev, buf, LCD_LINE2_OFFSET, LCD_LINE3_OFFSET);
615 }
616
617 static ssize_t show_line3(struct device *dev, struct device_attribute *attr,
618 char *buf)
619 {
620 return show_line(dev, buf, LCD_LINE3_OFFSET, LCD_LINE4_OFFSET);
621 }
622
623 /* Writing to /sys/../lineX will set the coresponding LCD line.
624 * - Excess characters are ignored.
625 * - If less characters are written than allowed, the remaining digits are
626 * unchanged.
627 * - The '\n' or '\t' char is a placeholder, it does not overwrite the
628 * original content.
629 */
630 static ssize_t store_line(struct device *dev, const char *buf, size_t count,
631 int el, size_t len)
632 {
633 struct yealink_dev *yld;
634 int i;
635
636 down_write(&sysfs_rwsema);
637 yld = dev_get_drvdata(dev);
638 if (yld == NULL) {
639 up_write(&sysfs_rwsema);
640 return -ENODEV;
641 }
642
643 if (len > count)
644 len = count;
645 for (i = 0; i < len; i++)
646 setChar(yld, el++, buf[i]);
647
648 up_write(&sysfs_rwsema);
649 return count;
650 }
651
652 static ssize_t store_line1(struct device *dev, struct device_attribute *attr,
653 const char *buf, size_t count)
654 {
655 return store_line(dev, buf, count, LCD_LINE1_OFFSET, LCD_LINE1_SIZE);
656 }
657
658 static ssize_t store_line2(struct device *dev, struct device_attribute *attr,
659 const char *buf, size_t count)
660 {
661 return store_line(dev, buf, count, LCD_LINE2_OFFSET, LCD_LINE2_SIZE);
662 }
663
664 static ssize_t store_line3(struct device *dev, struct device_attribute *attr,
665 const char *buf, size_t count)
666 {
667 return store_line(dev, buf, count, LCD_LINE3_OFFSET, LCD_LINE3_SIZE);
668 }
669
670 /* Interface to visible and audible "icons", these include:
671 * pictures on the LCD, the LED, and the dialtone signal.
672 */
673
674 /* Get a list of "switchable elements" with their current state. */
675 static ssize_t get_icons(struct device *dev, struct device_attribute *attr,
676 char *buf)
677 {
678 struct yealink_dev *yld;
679 int i, ret = 1;
680
681 down_read(&sysfs_rwsema);
682 yld = dev_get_drvdata(dev);
683 if (yld == NULL) {
684 up_read(&sysfs_rwsema);
685 return -ENODEV;
686 }
687
688 for (i = 0; i < ARRAY_SIZE(lcdMap); i++) {
689 if (lcdMap[i].type != '.')
690 continue;
691 ret += sprintf(&buf[ret], "%s %s\n",
692 yld->lcdMap[i] == ' ' ? " " : "on",
693 lcdMap[i].u.p.name);
694 }
695 up_read(&sysfs_rwsema);
696 return ret;
697 }
698
699 /* Change the visibility of a particular element. */
700 static ssize_t set_icon(struct device *dev, const char *buf, size_t count,
701 int chr)
702 {
703 struct yealink_dev *yld;
704 int i;
705
706 down_write(&sysfs_rwsema);
707 yld = dev_get_drvdata(dev);
708 if (yld == NULL) {
709 up_write(&sysfs_rwsema);
710 return -ENODEV;
711 }
712
713 for (i = 0; i < ARRAY_SIZE(lcdMap); i++) {
714 if (lcdMap[i].type != '.')
715 continue;
716 if (strncmp(buf, lcdMap[i].u.p.name, count) == 0) {
717 setChar(yld, i, chr);
718 break;
719 }
720 }
721
722 up_write(&sysfs_rwsema);
723 return count;
724 }
725
726 static ssize_t show_icon(struct device *dev, struct device_attribute *attr,
727 const char *buf, size_t count)
728 {
729 return set_icon(dev, buf, count, buf[0]);
730 }
731
732 static ssize_t hide_icon(struct device *dev, struct device_attribute *attr,
733 const char *buf, size_t count)
734 {
735 return set_icon(dev, buf, count, ' ');
736 }
737
738 /* Upload a ringtone to the device.
739 */
740
741 /* Stores raw ringtone data in the phone */
742 static ssize_t store_ringtone(struct device *dev,
743 struct device_attribute *attr,
744 const char *buf, size_t count)
745 {
746 struct yealink_dev *yld;
747
748 down_write(&sysfs_rwsema);
749 yld = dev_get_drvdata(dev);
750 if (yld == NULL) {
751 up_write(&sysfs_rwsema);
752 return -ENODEV;
753 }
754
755 /* TODO locking with async usb control interface??? */
756 yealink_set_ringtone(yld, (char *)buf, count);
757 up_write(&sysfs_rwsema);
758 return count;
759 }
760
761 #define _M444 S_IRUGO
762 #define _M664 S_IRUGO|S_IWUSR|S_IWGRP
763 #define _M220 S_IWUSR|S_IWGRP
764
765 static DEVICE_ATTR(map_seg7 , _M664, show_map , store_map );
766 static DEVICE_ATTR(line1 , _M664, show_line1 , store_line1 );
767 static DEVICE_ATTR(line2 , _M664, show_line2 , store_line2 );
768 static DEVICE_ATTR(line3 , _M664, show_line3 , store_line3 );
769 static DEVICE_ATTR(get_icons , _M444, get_icons , NULL );
770 static DEVICE_ATTR(show_icon , _M220, NULL , show_icon );
771 static DEVICE_ATTR(hide_icon , _M220, NULL , hide_icon );
772 static DEVICE_ATTR(ringtone , _M220, NULL , store_ringtone);
773
774 static struct attribute *yld_attributes[] = {
775 &dev_attr_line1.attr,
776 &dev_attr_line2.attr,
777 &dev_attr_line3.attr,
778 &dev_attr_get_icons.attr,
779 &dev_attr_show_icon.attr,
780 &dev_attr_hide_icon.attr,
781 &dev_attr_map_seg7.attr,
782 &dev_attr_ringtone.attr,
783 NULL
784 };
785
786 static const struct attribute_group yld_attr_group = {
787 .attrs = yld_attributes
788 };
789
790 /*******************************************************************************
791 * Linux interface and usb initialisation
792 ******************************************************************************/
793
794 struct driver_info {
795 char *name;
796 };
797
798 static const struct driver_info info_P1K = {
799 .name = "Yealink usb-p1k",
800 };
801
802 static const struct usb_device_id usb_table [] = {
803 {
804 .match_flags = USB_DEVICE_ID_MATCH_DEVICE |
805 USB_DEVICE_ID_MATCH_INT_INFO,
806 .idVendor = 0x6993,
807 .idProduct = 0xb001,
808 .bInterfaceClass = USB_CLASS_HID,
809 .bInterfaceSubClass = 0,
810 .bInterfaceProtocol = 0,
811 .driver_info = (kernel_ulong_t)&info_P1K
812 },
813 { }
814 };
815
816 static int usb_cleanup(struct yealink_dev *yld, int err)
817 {
818 if (yld == NULL)
819 return err;
820
821 if (yld->idev) {
822 if (err)
823 input_free_device(yld->idev);
824 else
825 input_unregister_device(yld->idev);
826 }
827
828 usb_free_urb(yld->urb_irq);
829 usb_free_urb(yld->urb_ctl);
830
831 kfree(yld->ctl_req);
832 usb_free_coherent(yld->udev, USB_PKT_LEN, yld->ctl_data, yld->ctl_dma);
833 usb_free_coherent(yld->udev, USB_PKT_LEN, yld->irq_data, yld->irq_dma);
834
835 kfree(yld);
836 return err;
837 }
838
839 static void usb_disconnect(struct usb_interface *intf)
840 {
841 struct yealink_dev *yld;
842
843 down_write(&sysfs_rwsema);
844 yld = usb_get_intfdata(intf);
845 sysfs_remove_group(&intf->dev.kobj, &yld_attr_group);
846 usb_set_intfdata(intf, NULL);
847 up_write(&sysfs_rwsema);
848
849 usb_cleanup(yld, 0);
850 }
851
852 static int usb_probe(struct usb_interface *intf, const struct usb_device_id *id)
853 {
854 struct usb_device *udev = interface_to_usbdev (intf);
855 struct driver_info *nfo = (struct driver_info *)id->driver_info;
856 struct usb_host_interface *interface;
857 struct usb_endpoint_descriptor *endpoint;
858 struct yealink_dev *yld;
859 struct input_dev *input_dev;
860 int ret, pipe, i;
861
862 interface = intf->cur_altsetting;
863
864 if (interface->desc.bNumEndpoints < 1)
865 return -ENODEV;
866
867 endpoint = &interface->endpoint[0].desc;
868 if (!usb_endpoint_is_int_in(endpoint))
869 return -ENODEV;
870
871 yld = kzalloc(sizeof(struct yealink_dev), GFP_KERNEL);
872 if (!yld)
873 return -ENOMEM;
874
875 yld->udev = udev;
876 yld->intf = intf;
877
878 yld->idev = input_dev = input_allocate_device();
879 if (!input_dev)
880 return usb_cleanup(yld, -ENOMEM);
881
882 /* allocate usb buffers */
883 yld->irq_data = usb_alloc_coherent(udev, USB_PKT_LEN,
884 GFP_KERNEL, &yld->irq_dma);
885 if (yld->irq_data == NULL)
886 return usb_cleanup(yld, -ENOMEM);
887
888 yld->ctl_data = usb_alloc_coherent(udev, USB_PKT_LEN,
889 GFP_KERNEL, &yld->ctl_dma);
890 if (!yld->ctl_data)
891 return usb_cleanup(yld, -ENOMEM);
892
893 yld->ctl_req = kmalloc(sizeof(*(yld->ctl_req)), GFP_KERNEL);
894 if (yld->ctl_req == NULL)
895 return usb_cleanup(yld, -ENOMEM);
896
897 /* allocate urb structures */
898 yld->urb_irq = usb_alloc_urb(0, GFP_KERNEL);
899 if (yld->urb_irq == NULL)
900 return usb_cleanup(yld, -ENOMEM);
901
902 yld->urb_ctl = usb_alloc_urb(0, GFP_KERNEL);
903 if (yld->urb_ctl == NULL)
904 return usb_cleanup(yld, -ENOMEM);
905
906 /* get a handle to the interrupt data pipe */
907 pipe = usb_rcvintpipe(udev, endpoint->bEndpointAddress);
908 ret = usb_maxpacket(udev, pipe, usb_pipeout(pipe));
909 if (ret != USB_PKT_LEN)
910 dev_err(&intf->dev, "invalid payload size %d, expected %zd\n",
911 ret, USB_PKT_LEN);
912
913 /* initialise irq urb */
914 usb_fill_int_urb(yld->urb_irq, udev, pipe, yld->irq_data,
915 USB_PKT_LEN,
916 urb_irq_callback,
917 yld, endpoint->bInterval);
918 yld->urb_irq->transfer_dma = yld->irq_dma;
919 yld->urb_irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
920 yld->urb_irq->dev = udev;
921
922 /* initialise ctl urb */
923 yld->ctl_req->bRequestType = USB_TYPE_CLASS | USB_RECIP_INTERFACE |
924 USB_DIR_OUT;
925 yld->ctl_req->bRequest = USB_REQ_SET_CONFIGURATION;
926 yld->ctl_req->wValue = cpu_to_le16(0x200);
927 yld->ctl_req->wIndex = cpu_to_le16(interface->desc.bInterfaceNumber);
928 yld->ctl_req->wLength = cpu_to_le16(USB_PKT_LEN);
929
930 usb_fill_control_urb(yld->urb_ctl, udev, usb_sndctrlpipe(udev, 0),
931 (void *)yld->ctl_req, yld->ctl_data, USB_PKT_LEN,
932 urb_ctl_callback, yld);
933 yld->urb_ctl->transfer_dma = yld->ctl_dma;
934 yld->urb_ctl->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
935 yld->urb_ctl->dev = udev;
936
937 /* find out the physical bus location */
938 usb_make_path(udev, yld->phys, sizeof(yld->phys));
939 strlcat(yld->phys, "/input0", sizeof(yld->phys));
940
941 /* register settings for the input device */
942 input_dev->name = nfo->name;
943 input_dev->phys = yld->phys;
944 usb_to_input_id(udev, &input_dev->id);
945 input_dev->dev.parent = &intf->dev;
946
947 input_set_drvdata(input_dev, yld);
948
949 input_dev->open = input_open;
950 input_dev->close = input_close;
951 /* input_dev->event = input_ev; TODO */
952
953 /* register available key events */
954 input_dev->evbit[0] = BIT_MASK(EV_KEY);
955 for (i = 0; i < 256; i++) {
956 int k = map_p1k_to_key(i);
957 if (k >= 0) {
958 set_bit(k & 0xff, input_dev->keybit);
959 if (k >> 8)
960 set_bit(k >> 8, input_dev->keybit);
961 }
962 }
963
964 ret = input_register_device(yld->idev);
965 if (ret)
966 return usb_cleanup(yld, ret);
967
968 usb_set_intfdata(intf, yld);
969
970 /* clear visible elements */
971 for (i = 0; i < ARRAY_SIZE(lcdMap); i++)
972 setChar(yld, i, ' ');
973
974 /* display driver version on LCD line 3 */
975 store_line3(&intf->dev, NULL,
976 DRIVER_VERSION, sizeof(DRIVER_VERSION));
977
978 /* Register sysfs hooks (don't care about failure) */
979 ret = sysfs_create_group(&intf->dev.kobj, &yld_attr_group);
980 return 0;
981 }
982
983 static struct usb_driver yealink_driver = {
984 .name = "yealink",
985 .probe = usb_probe,
986 .disconnect = usb_disconnect,
987 .id_table = usb_table,
988 };
989
990 module_usb_driver(yealink_driver);
991
992 MODULE_DEVICE_TABLE (usb, usb_table);
993
994 MODULE_AUTHOR("Henk Vergonet");
995 MODULE_DESCRIPTION("Yealink phone driver");
996 MODULE_LICENSE("GPL");
Linux with added FPC-III support