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
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 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 */
125 static 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 */
setChar(struct yealink_dev * yld,int el,int chr)131 static 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 */
map_p1k_to_key(int scancode)192 static 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 */
report_key(struct yealink_dev * yld,int key)224 static 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
yealink_cmd(struct yealink_dev * yld,struct yld_ctl_packet * p)249 static 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
267 static 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
yealink_set_ringtone(struct yealink_dev * yld,u8 * buf,size_t size)281 static 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 */
yealink_do_idle_tasks(struct yealink_dev * yld)316 static 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
348 send_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 singe 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 */
urb_irq_callback(struct urb * urb)412 static 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
urb_ctl_callback(struct urb * urb)450 static 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?
484 static 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
input_open(struct input_dev * dev)503 static 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
input_close(struct input_dev * dev)531 static 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 */
show_map(struct device * dev,struct device_attribute * attr,char * buf)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
store_map(struct device * dev,struct device_attribute * attr,const char * buf,size_t cnt)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 */
show_line(struct device * dev,char * buf,int a,int b)581 static 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
show_line1(struct device * dev,struct device_attribute * attr,char * buf)599 static 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
show_line2(struct device * dev,struct device_attribute * attr,char * buf)605 static 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
show_line3(struct device * dev,struct device_attribute * attr,char * buf)611 static 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 coresponding 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 */
store_line(struct device * dev,const char * buf,size_t count,int el,size_t len)624 static 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
store_line1(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)640 static 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
store_line2(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)646 static 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
store_line3(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)652 static 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. */
get_icons(struct device * dev,struct device_attribute * attr,char * buf)663 static 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. */
set_icon(struct device * dev,const char * buf,size_t count,int chr)683 static 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
show_icon(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)703 static 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
hide_icon(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)709 static 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 */
store_ringtone(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)719 static 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
736 static DEVICE_ATTR(map_seg7 , _M664, show_map , store_map );
737 static DEVICE_ATTR(line1 , _M664, show_line1 , store_line1 );
738 static DEVICE_ATTR(line2 , _M664, show_line2 , store_line2 );
739 static DEVICE_ATTR(line3 , _M664, show_line3 , store_line3 );
740 static DEVICE_ATTR(get_icons , _M444, get_icons , NULL );
741 static DEVICE_ATTR(show_icon , _M220, NULL , show_icon );
742 static DEVICE_ATTR(hide_icon , _M220, NULL , hide_icon );
743 static DEVICE_ATTR(ringtone , _M220, NULL , store_ringtone);
744
745 static 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 };
756 ATTRIBUTE_GROUPS(yld);
757
758 /*******************************************************************************
759 * Linux interface and usb initialisation
760 ******************************************************************************/
761
762 struct driver_info {
763 char *name;
764 };
765
766 static const struct driver_info info_P1K = {
767 .name = "Yealink usb-p1k",
768 };
769
770 static 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
usb_cleanup(struct yealink_dev * yld,int err)784 static 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
usb_disconnect(struct usb_interface * intf)807 static 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
usb_probe(struct usb_interface * intf,const struct usb_device_id * id)815 static 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
945 static 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
953 module_usb_driver(yealink_driver);
954
955 MODULE_DEVICE_TABLE (usb, usb_table);
956
957 MODULE_AUTHOR("Henk Vergonet");
958 MODULE_DESCRIPTION("Yealink phone driver");
959 MODULE_LICENSE("GPL");
960