1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Driver for the VoIP USB phones with CM109 chipsets.
4 *
5 * Copyright (C) 2007 - 2008 Alfred E. Heggestad <aeh@db.org>
6 */
7
8 /*
9 * Tested devices:
10 * - Komunikate KIP1000
11 * - Genius G-talk
12 * - Allied-Telesis Corega USBPH01
13 * - ...
14 *
15 * This driver is based on the yealink.c driver
16 *
17 * Thanks to:
18 * - Authors of yealink.c
19 * - Thomas Reitmayr
20 * - Oliver Neukum for good review comments and code
21 * - Shaun Jackman <sjackman@gmail.com> for Genius G-talk keymap
22 * - Dmitry Torokhov for valuable input and review
23 *
24 * Todo:
25 * - Read/write EEPROM
26 */
27
28 #include <linux/kernel.h>
29 #include <linux/init.h>
30 #include <linux/slab.h>
31 #include <linux/module.h>
32 #include <linux/moduleparam.h>
33 #include <linux/rwsem.h>
34 #include <linux/usb/input.h>
35
36 #define DRIVER_VERSION "20080805"
37 #define DRIVER_AUTHOR "Alfred E. Heggestad"
38 #define DRIVER_DESC "CM109 phone driver"
39
40 static char *phone = "kip1000";
41 module_param(phone, charp, S_IRUSR);
42 MODULE_PARM_DESC(phone, "Phone name {kip1000, gtalk, usbph01, atcom}");
43
44 enum {
45 /* HID Registers */
46 HID_IR0 = 0x00, /* Record/Playback-mute button, Volume up/down */
47 HID_IR1 = 0x01, /* GPI, generic registers or EEPROM_DATA0 */
48 HID_IR2 = 0x02, /* Generic registers or EEPROM_DATA1 */
49 HID_IR3 = 0x03, /* Generic registers or EEPROM_CTRL */
50 HID_OR0 = 0x00, /* Mapping control, buzzer, SPDIF (offset 0x04) */
51 HID_OR1 = 0x01, /* GPO - General Purpose Output */
52 HID_OR2 = 0x02, /* Set GPIO to input/output mode */
53 HID_OR3 = 0x03, /* SPDIF status channel or EEPROM_CTRL */
54
55 /* HID_IR0 */
56 RECORD_MUTE = 1 << 3,
57 PLAYBACK_MUTE = 1 << 2,
58 VOLUME_DOWN = 1 << 1,
59 VOLUME_UP = 1 << 0,
60
61 /* HID_OR0 */
62 /* bits 7-6
63 0: HID_OR1-2 are used for GPO; HID_OR0, 3 are used for buzzer
64 and SPDIF
65 1: HID_OR0-3 are used as generic HID registers
66 2: Values written to HID_OR0-3 are also mapped to MCU_CTRL,
67 EEPROM_DATA0-1, EEPROM_CTRL (see Note)
68 3: Reserved
69 */
70 HID_OR_GPO_BUZ_SPDIF = 0 << 6,
71 HID_OR_GENERIC_HID_REG = 1 << 6,
72 HID_OR_MAP_MCU_EEPROM = 2 << 6,
73
74 BUZZER_ON = 1 << 5,
75
76 /* up to 256 normal keys, up to 15 special key combinations */
77 KEYMAP_SIZE = 256 + 15,
78 };
79
80 /* CM109 protocol packet */
81 struct cm109_ctl_packet {
82 u8 byte[4];
83 } __attribute__ ((packed));
84
85 enum { USB_PKT_LEN = sizeof(struct cm109_ctl_packet) };
86
87 /* CM109 device structure */
88 struct cm109_dev {
89 struct input_dev *idev; /* input device */
90 struct usb_device *udev; /* usb device */
91 struct usb_interface *intf;
92
93 /* irq input channel */
94 struct cm109_ctl_packet *irq_data;
95 dma_addr_t irq_dma;
96 struct urb *urb_irq;
97
98 /* control output channel */
99 struct cm109_ctl_packet *ctl_data;
100 dma_addr_t ctl_dma;
101 struct usb_ctrlrequest *ctl_req;
102 struct urb *urb_ctl;
103 /*
104 * The 3 bitfields below are protected by ctl_submit_lock.
105 * They have to be separate since they are accessed from IRQ
106 * context.
107 */
108 unsigned irq_urb_pending:1; /* irq_urb is in flight */
109 unsigned ctl_urb_pending:1; /* ctl_urb is in flight */
110 unsigned buzzer_pending:1; /* need to issue buzz command */
111 spinlock_t ctl_submit_lock;
112
113 unsigned char buzzer_state; /* on/off */
114
115 /* flags */
116 unsigned open:1;
117 unsigned resetting:1;
118 unsigned shutdown:1;
119
120 /* This mutex protects writes to the above flags */
121 struct mutex pm_mutex;
122
123 unsigned short keymap[KEYMAP_SIZE];
124
125 char phys[64]; /* physical device path */
126 int key_code; /* last reported key */
127 int keybit; /* 0=new scan 1,2,4,8=scan columns */
128 u8 gpi; /* Cached value of GPI (high nibble) */
129 };
130
131 /******************************************************************************
132 * CM109 key interface
133 *****************************************************************************/
134
special_keymap(int code)135 static unsigned short special_keymap(int code)
136 {
137 if (code > 0xff) {
138 switch (code - 0xff) {
139 case RECORD_MUTE: return KEY_MICMUTE;
140 case PLAYBACK_MUTE: return KEY_MUTE;
141 case VOLUME_DOWN: return KEY_VOLUMEDOWN;
142 case VOLUME_UP: return KEY_VOLUMEUP;
143 }
144 }
145 return KEY_RESERVED;
146 }
147
148 /* Map device buttons to internal key events.
149 *
150 * The "up" and "down" keys, are symbolised by arrows on the button.
151 * The "pickup" and "hangup" keys are symbolised by a green and red phone
152 * on the button.
153
154 Komunikate KIP1000 Keyboard Matrix
155
156 -> -- 1 -- 2 -- 3 --> GPI pin 4 (0x10)
157 | | | |
158 <- -- 4 -- 5 -- 6 --> GPI pin 5 (0x20)
159 | | | |
160 END - 7 -- 8 -- 9 --> GPI pin 6 (0x40)
161 | | | |
162 OK -- * -- 0 -- # --> GPI pin 7 (0x80)
163 | | | |
164
165 /|\ /|\ /|\ /|\
166 | | | |
167 GPO
168 pin: 3 2 1 0
169 0x8 0x4 0x2 0x1
170
171 */
keymap_kip1000(int scancode)172 static unsigned short keymap_kip1000(int scancode)
173 {
174 switch (scancode) { /* phone key: */
175 case 0x82: return KEY_NUMERIC_0; /* 0 */
176 case 0x14: return KEY_NUMERIC_1; /* 1 */
177 case 0x12: return KEY_NUMERIC_2; /* 2 */
178 case 0x11: return KEY_NUMERIC_3; /* 3 */
179 case 0x24: return KEY_NUMERIC_4; /* 4 */
180 case 0x22: return KEY_NUMERIC_5; /* 5 */
181 case 0x21: return KEY_NUMERIC_6; /* 6 */
182 case 0x44: return KEY_NUMERIC_7; /* 7 */
183 case 0x42: return KEY_NUMERIC_8; /* 8 */
184 case 0x41: return KEY_NUMERIC_9; /* 9 */
185 case 0x81: return KEY_NUMERIC_POUND; /* # */
186 case 0x84: return KEY_NUMERIC_STAR; /* * */
187 case 0x88: return KEY_ENTER; /* pickup */
188 case 0x48: return KEY_ESC; /* hangup */
189 case 0x28: return KEY_LEFT; /* IN */
190 case 0x18: return KEY_RIGHT; /* OUT */
191 default: return special_keymap(scancode);
192 }
193 }
194
195 /*
196 Contributed by Shaun Jackman <sjackman@gmail.com>
197
198 Genius G-Talk keyboard matrix
199 0 1 2 3
200 4: 0 4 8 Talk
201 5: 1 5 9 End
202 6: 2 6 # Up
203 7: 3 7 * Down
204 */
keymap_gtalk(int scancode)205 static unsigned short keymap_gtalk(int scancode)
206 {
207 switch (scancode) {
208 case 0x11: return KEY_NUMERIC_0;
209 case 0x21: return KEY_NUMERIC_1;
210 case 0x41: return KEY_NUMERIC_2;
211 case 0x81: return KEY_NUMERIC_3;
212 case 0x12: return KEY_NUMERIC_4;
213 case 0x22: return KEY_NUMERIC_5;
214 case 0x42: return KEY_NUMERIC_6;
215 case 0x82: return KEY_NUMERIC_7;
216 case 0x14: return KEY_NUMERIC_8;
217 case 0x24: return KEY_NUMERIC_9;
218 case 0x44: return KEY_NUMERIC_POUND; /* # */
219 case 0x84: return KEY_NUMERIC_STAR; /* * */
220 case 0x18: return KEY_ENTER; /* Talk (green handset) */
221 case 0x28: return KEY_ESC; /* End (red handset) */
222 case 0x48: return KEY_UP; /* Menu up (rocker switch) */
223 case 0x88: return KEY_DOWN; /* Menu down (rocker switch) */
224 default: return special_keymap(scancode);
225 }
226 }
227
228 /*
229 * Keymap for Allied-Telesis Corega USBPH01
230 * http://www.alliedtelesis-corega.com/2/1344/1437/1360/chprd.html
231 *
232 * Contributed by july@nat.bg
233 */
keymap_usbph01(int scancode)234 static unsigned short keymap_usbph01(int scancode)
235 {
236 switch (scancode) {
237 case 0x11: return KEY_NUMERIC_0; /* 0 */
238 case 0x21: return KEY_NUMERIC_1; /* 1 */
239 case 0x41: return KEY_NUMERIC_2; /* 2 */
240 case 0x81: return KEY_NUMERIC_3; /* 3 */
241 case 0x12: return KEY_NUMERIC_4; /* 4 */
242 case 0x22: return KEY_NUMERIC_5; /* 5 */
243 case 0x42: return KEY_NUMERIC_6; /* 6 */
244 case 0x82: return KEY_NUMERIC_7; /* 7 */
245 case 0x14: return KEY_NUMERIC_8; /* 8 */
246 case 0x24: return KEY_NUMERIC_9; /* 9 */
247 case 0x44: return KEY_NUMERIC_POUND; /* # */
248 case 0x84: return KEY_NUMERIC_STAR; /* * */
249 case 0x18: return KEY_ENTER; /* pickup */
250 case 0x28: return KEY_ESC; /* hangup */
251 case 0x48: return KEY_LEFT; /* IN */
252 case 0x88: return KEY_RIGHT; /* OUT */
253 default: return special_keymap(scancode);
254 }
255 }
256
257 /*
258 * Keymap for ATCom AU-100
259 * http://www.atcom.cn/products.html
260 * http://www.packetizer.com/products/au100/
261 * http://www.voip-info.org/wiki/view/AU-100
262 *
263 * Contributed by daniel@gimpelevich.san-francisco.ca.us
264 */
keymap_atcom(int scancode)265 static unsigned short keymap_atcom(int scancode)
266 {
267 switch (scancode) { /* phone key: */
268 case 0x82: return KEY_NUMERIC_0; /* 0 */
269 case 0x11: return KEY_NUMERIC_1; /* 1 */
270 case 0x12: return KEY_NUMERIC_2; /* 2 */
271 case 0x14: return KEY_NUMERIC_3; /* 3 */
272 case 0x21: return KEY_NUMERIC_4; /* 4 */
273 case 0x22: return KEY_NUMERIC_5; /* 5 */
274 case 0x24: return KEY_NUMERIC_6; /* 6 */
275 case 0x41: return KEY_NUMERIC_7; /* 7 */
276 case 0x42: return KEY_NUMERIC_8; /* 8 */
277 case 0x44: return KEY_NUMERIC_9; /* 9 */
278 case 0x84: return KEY_NUMERIC_POUND; /* # */
279 case 0x81: return KEY_NUMERIC_STAR; /* * */
280 case 0x18: return KEY_ENTER; /* pickup */
281 case 0x28: return KEY_ESC; /* hangup */
282 case 0x48: return KEY_LEFT; /* left arrow */
283 case 0x88: return KEY_RIGHT; /* right arrow */
284 default: return special_keymap(scancode);
285 }
286 }
287
288 static unsigned short (*keymap)(int) = keymap_kip1000;
289
290 /*
291 * Completes a request by converting the data into events for the
292 * input subsystem.
293 */
report_key(struct cm109_dev * dev,int key)294 static void report_key(struct cm109_dev *dev, int key)
295 {
296 struct input_dev *idev = dev->idev;
297
298 if (dev->key_code >= 0) {
299 /* old key up */
300 input_report_key(idev, dev->key_code, 0);
301 }
302
303 dev->key_code = key;
304 if (key >= 0) {
305 /* new valid key */
306 input_report_key(idev, key, 1);
307 }
308
309 input_sync(idev);
310 }
311
312 /*
313 * Converts data of special key presses (volume, mute) into events
314 * for the input subsystem, sends press-n-release for mute keys.
315 */
cm109_report_special(struct cm109_dev * dev)316 static void cm109_report_special(struct cm109_dev *dev)
317 {
318 static const u8 autorelease = RECORD_MUTE | PLAYBACK_MUTE;
319 struct input_dev *idev = dev->idev;
320 u8 data = dev->irq_data->byte[HID_IR0];
321 unsigned short keycode;
322 int i;
323
324 for (i = 0; i < 4; i++) {
325 keycode = dev->keymap[0xff + BIT(i)];
326 if (keycode == KEY_RESERVED)
327 continue;
328
329 input_report_key(idev, keycode, data & BIT(i));
330 if (data & autorelease & BIT(i)) {
331 input_sync(idev);
332 input_report_key(idev, keycode, 0);
333 }
334 }
335 input_sync(idev);
336 }
337
338 /******************************************************************************
339 * CM109 usb communication interface
340 *****************************************************************************/
341
cm109_submit_buzz_toggle(struct cm109_dev * dev)342 static void cm109_submit_buzz_toggle(struct cm109_dev *dev)
343 {
344 int error;
345
346 if (dev->buzzer_state)
347 dev->ctl_data->byte[HID_OR0] |= BUZZER_ON;
348 else
349 dev->ctl_data->byte[HID_OR0] &= ~BUZZER_ON;
350
351 error = usb_submit_urb(dev->urb_ctl, GFP_ATOMIC);
352 if (error)
353 dev_err(&dev->intf->dev,
354 "%s: usb_submit_urb (urb_ctl) failed %d\n",
355 __func__, error);
356 }
357
cm109_submit_ctl(struct cm109_dev * dev)358 static void cm109_submit_ctl(struct cm109_dev *dev)
359 {
360 int error;
361
362 guard(spinlock_irqsave)(&dev->ctl_submit_lock);
363
364 dev->irq_urb_pending = 0;
365
366 if (unlikely(dev->shutdown))
367 return;
368
369 if (dev->buzzer_state)
370 dev->ctl_data->byte[HID_OR0] |= BUZZER_ON;
371 else
372 dev->ctl_data->byte[HID_OR0] &= ~BUZZER_ON;
373
374 dev->ctl_data->byte[HID_OR1] = dev->keybit;
375 dev->ctl_data->byte[HID_OR2] = dev->keybit;
376
377 dev->buzzer_pending = 0;
378 dev->ctl_urb_pending = 1;
379
380 error = usb_submit_urb(dev->urb_ctl, GFP_ATOMIC);
381 if (error)
382 dev_err(&dev->intf->dev,
383 "%s: usb_submit_urb (urb_ctl) failed %d\n",
384 __func__, error);
385 }
386
387 /*
388 * IRQ handler
389 */
cm109_urb_irq_callback(struct urb * urb)390 static void cm109_urb_irq_callback(struct urb *urb)
391 {
392 struct cm109_dev *dev = urb->context;
393 const int status = urb->status;
394
395 dev_dbg(&dev->intf->dev, "### URB IRQ: [0x%02x 0x%02x 0x%02x 0x%02x] keybit=0x%02x\n",
396 dev->irq_data->byte[0],
397 dev->irq_data->byte[1],
398 dev->irq_data->byte[2],
399 dev->irq_data->byte[3],
400 dev->keybit);
401
402 if (status) {
403 if (status == -ESHUTDOWN)
404 return;
405 dev_err_ratelimited(&dev->intf->dev, "%s: urb status %d\n",
406 __func__, status);
407 goto out;
408 }
409
410 /* Special keys */
411 cm109_report_special(dev);
412
413 /* Scan key column */
414 if (dev->keybit == 0xf) {
415
416 /* Any changes ? */
417 if ((dev->gpi & 0xf0) == (dev->irq_data->byte[HID_IR1] & 0xf0))
418 goto out;
419
420 dev->gpi = dev->irq_data->byte[HID_IR1] & 0xf0;
421 dev->keybit = 0x1;
422 } else {
423 report_key(dev, dev->keymap[dev->irq_data->byte[HID_IR1]]);
424
425 dev->keybit <<= 1;
426 if (dev->keybit > 0x8)
427 dev->keybit = 0xf;
428 }
429
430 out:
431 cm109_submit_ctl(dev);
432 }
433
cm109_urb_ctl_callback(struct urb * urb)434 static void cm109_urb_ctl_callback(struct urb *urb)
435 {
436 struct cm109_dev *dev = urb->context;
437 const int status = urb->status;
438 int error;
439
440 dev_dbg(&dev->intf->dev, "### URB CTL: [0x%02x 0x%02x 0x%02x 0x%02x]\n",
441 dev->ctl_data->byte[0],
442 dev->ctl_data->byte[1],
443 dev->ctl_data->byte[2],
444 dev->ctl_data->byte[3]);
445
446 if (status) {
447 if (status == -ESHUTDOWN)
448 return;
449 dev_err_ratelimited(&dev->intf->dev, "%s: urb status %d\n",
450 __func__, status);
451 }
452
453 guard(spinlock_irqsave)(&dev->ctl_submit_lock);
454
455 dev->ctl_urb_pending = 0;
456
457 if (unlikely(dev->shutdown))
458 return;
459
460 if (dev->buzzer_pending || status) {
461 dev->buzzer_pending = 0;
462 dev->ctl_urb_pending = 1;
463 cm109_submit_buzz_toggle(dev);
464 } else if (likely(!dev->irq_urb_pending)) {
465 /* ask for key data */
466 dev->irq_urb_pending = 1;
467 error = usb_submit_urb(dev->urb_irq, GFP_ATOMIC);
468 if (error)
469 dev_err(&dev->intf->dev,
470 "%s: usb_submit_urb (urb_irq) failed %d\n",
471 __func__, error);
472 }
473 }
474
cm109_toggle_buzzer_async(struct cm109_dev * dev)475 static void cm109_toggle_buzzer_async(struct cm109_dev *dev)
476 {
477 guard(spinlock_irqsave)(&dev->ctl_submit_lock);
478
479 if (dev->ctl_urb_pending) {
480 /* URB completion will resubmit */
481 dev->buzzer_pending = 1;
482 } else {
483 dev->ctl_urb_pending = 1;
484 cm109_submit_buzz_toggle(dev);
485 }
486 }
487
cm109_toggle_buzzer_sync(struct cm109_dev * dev,int on)488 static void cm109_toggle_buzzer_sync(struct cm109_dev *dev, int on)
489 {
490 int error;
491
492 if (on)
493 dev->ctl_data->byte[HID_OR0] |= BUZZER_ON;
494 else
495 dev->ctl_data->byte[HID_OR0] &= ~BUZZER_ON;
496
497 error = usb_control_msg(dev->udev,
498 usb_sndctrlpipe(dev->udev, 0),
499 dev->ctl_req->bRequest,
500 dev->ctl_req->bRequestType,
501 le16_to_cpu(dev->ctl_req->wValue),
502 le16_to_cpu(dev->ctl_req->wIndex),
503 dev->ctl_data,
504 USB_PKT_LEN, USB_CTRL_SET_TIMEOUT);
505 if (error < 0 && error != -EINTR)
506 dev_err(&dev->intf->dev, "%s: usb_control_msg() failed %d\n",
507 __func__, error);
508 }
509
cm109_stop_traffic(struct cm109_dev * dev)510 static void cm109_stop_traffic(struct cm109_dev *dev)
511 {
512 dev->shutdown = 1;
513 /*
514 * Make sure other CPUs see this
515 */
516 smp_wmb();
517
518 usb_kill_urb(dev->urb_ctl);
519 usb_kill_urb(dev->urb_irq);
520
521 cm109_toggle_buzzer_sync(dev, 0);
522
523 dev->shutdown = 0;
524 smp_wmb();
525 }
526
cm109_restore_state(struct cm109_dev * dev)527 static void cm109_restore_state(struct cm109_dev *dev)
528 {
529 if (dev->open) {
530 /*
531 * Restore buzzer state.
532 * This will also kick regular URB submission
533 */
534 cm109_toggle_buzzer_async(dev);
535 }
536 }
537
538 /******************************************************************************
539 * input event interface
540 *****************************************************************************/
541
cm109_input_open(struct input_dev * idev)542 static int cm109_input_open(struct input_dev *idev)
543 {
544 struct cm109_dev *dev = input_get_drvdata(idev);
545 int error;
546
547 error = usb_autopm_get_interface(dev->intf);
548 if (error < 0) {
549 dev_err(&idev->dev, "%s - cannot autoresume, result %d\n",
550 __func__, error);
551 return error;
552 }
553
554 scoped_guard(mutex, &dev->pm_mutex) {
555 dev->buzzer_state = 0;
556 dev->key_code = -1; /* no keys pressed */
557 dev->keybit = 0xf;
558
559 /* issue INIT */
560 dev->ctl_data->byte[HID_OR0] = HID_OR_GPO_BUZ_SPDIF;
561 dev->ctl_data->byte[HID_OR1] = dev->keybit;
562 dev->ctl_data->byte[HID_OR2] = dev->keybit;
563 dev->ctl_data->byte[HID_OR3] = 0x00;
564
565 dev->ctl_urb_pending = 1;
566 error = usb_submit_urb(dev->urb_ctl, GFP_KERNEL);
567 if (!error) {
568 dev->open = 1;
569 return 0;
570 }
571 }
572
573 dev->ctl_urb_pending = 0;
574 usb_autopm_put_interface(dev->intf);
575
576 dev_err(&dev->intf->dev, "%s: usb_submit_urb (urb_ctl) failed %d\n",
577 __func__, error);
578
579 return error;
580 }
581
cm109_input_close(struct input_dev * idev)582 static void cm109_input_close(struct input_dev *idev)
583 {
584 struct cm109_dev *dev = input_get_drvdata(idev);
585
586 scoped_guard(mutex, &dev->pm_mutex) {
587 /*
588 * Once we are here event delivery is stopped so we
589 * don't need to worry about someone starting buzzer
590 * again
591 */
592 cm109_stop_traffic(dev);
593 dev->open = 0;
594 }
595
596 usb_autopm_put_interface(dev->intf);
597 }
598
cm109_input_ev(struct input_dev * idev,unsigned int type,unsigned int code,int value)599 static int cm109_input_ev(struct input_dev *idev, unsigned int type,
600 unsigned int code, int value)
601 {
602 struct cm109_dev *dev = input_get_drvdata(idev);
603
604 dev_dbg(&dev->intf->dev,
605 "input_ev: type=%u code=%u value=%d\n", type, code, value);
606
607 if (type != EV_SND)
608 return -EINVAL;
609
610 switch (code) {
611 case SND_TONE:
612 case SND_BELL:
613 dev->buzzer_state = !!value;
614 if (!dev->resetting)
615 cm109_toggle_buzzer_async(dev);
616 return 0;
617
618 default:
619 return -EINVAL;
620 }
621 }
622
623
624 /******************************************************************************
625 * Linux interface and usb initialisation
626 *****************************************************************************/
627
628 struct driver_info {
629 char *name;
630 };
631
632 static const struct driver_info info_cm109 = {
633 .name = "CM109 USB driver",
634 };
635
636 enum {
637 VENDOR_ID = 0x0d8c, /* C-Media Electronics */
638 PRODUCT_ID_CM109 = 0x000e, /* CM109 defines range 0x0008 - 0x000f */
639 };
640
641 /* table of devices that work with this driver */
642 static const struct usb_device_id cm109_usb_table[] = {
643 {
644 .match_flags = USB_DEVICE_ID_MATCH_DEVICE |
645 USB_DEVICE_ID_MATCH_INT_INFO,
646 .idVendor = VENDOR_ID,
647 .idProduct = PRODUCT_ID_CM109,
648 .bInterfaceClass = USB_CLASS_HID,
649 .bInterfaceSubClass = 0,
650 .bInterfaceProtocol = 0,
651 .driver_info = (kernel_ulong_t) &info_cm109
652 },
653 /* you can add more devices here with product ID 0x0008 - 0x000f */
654 { }
655 };
656
cm109_usb_cleanup(struct cm109_dev * dev)657 static void cm109_usb_cleanup(struct cm109_dev *dev)
658 {
659 kfree(dev->ctl_req);
660 usb_free_coherent(dev->udev, USB_PKT_LEN, dev->ctl_data, dev->ctl_dma);
661 usb_free_coherent(dev->udev, USB_PKT_LEN, dev->irq_data, dev->irq_dma);
662
663 usb_free_urb(dev->urb_irq); /* parameter validation in core/urb */
664 usb_free_urb(dev->urb_ctl); /* parameter validation in core/urb */
665 kfree(dev);
666 }
667
cm109_usb_disconnect(struct usb_interface * interface)668 static void cm109_usb_disconnect(struct usb_interface *interface)
669 {
670 struct cm109_dev *dev = usb_get_intfdata(interface);
671
672 usb_set_intfdata(interface, NULL);
673 input_unregister_device(dev->idev);
674 cm109_usb_cleanup(dev);
675 }
676
cm109_usb_probe(struct usb_interface * intf,const struct usb_device_id * id)677 static int cm109_usb_probe(struct usb_interface *intf,
678 const struct usb_device_id *id)
679 {
680 struct usb_device *udev = interface_to_usbdev(intf);
681 struct driver_info *nfo = (struct driver_info *)id->driver_info;
682 struct usb_host_interface *interface;
683 struct usb_endpoint_descriptor *endpoint;
684 struct cm109_dev *dev;
685 struct input_dev *input_dev = NULL;
686 int ret, pipe, i;
687 int error = -ENOMEM;
688
689 interface = intf->cur_altsetting;
690
691 if (interface->desc.bNumEndpoints < 1)
692 return -ENODEV;
693
694 endpoint = &interface->endpoint[0].desc;
695
696 if (!usb_endpoint_is_int_in(endpoint))
697 return -ENODEV;
698
699 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
700 if (!dev)
701 return -ENOMEM;
702
703 spin_lock_init(&dev->ctl_submit_lock);
704 mutex_init(&dev->pm_mutex);
705
706 dev->udev = udev;
707 dev->intf = intf;
708
709 dev->idev = input_dev = input_allocate_device();
710 if (!input_dev)
711 goto err_out;
712
713 /* allocate usb buffers */
714 dev->irq_data = usb_alloc_coherent(udev, USB_PKT_LEN,
715 GFP_KERNEL, &dev->irq_dma);
716 if (!dev->irq_data)
717 goto err_out;
718
719 dev->ctl_data = usb_alloc_coherent(udev, USB_PKT_LEN,
720 GFP_KERNEL, &dev->ctl_dma);
721 if (!dev->ctl_data)
722 goto err_out;
723
724 dev->ctl_req = kmalloc(sizeof(*(dev->ctl_req)), GFP_KERNEL);
725 if (!dev->ctl_req)
726 goto err_out;
727
728 /* allocate urb structures */
729 dev->urb_irq = usb_alloc_urb(0, GFP_KERNEL);
730 if (!dev->urb_irq)
731 goto err_out;
732
733 dev->urb_ctl = usb_alloc_urb(0, GFP_KERNEL);
734 if (!dev->urb_ctl)
735 goto err_out;
736
737 /* get a handle to the interrupt data pipe */
738 pipe = usb_rcvintpipe(udev, endpoint->bEndpointAddress);
739 ret = usb_maxpacket(udev, pipe);
740 if (ret != USB_PKT_LEN)
741 dev_err(&intf->dev, "invalid payload size %d, expected %d\n",
742 ret, USB_PKT_LEN);
743
744 /* initialise irq urb */
745 usb_fill_int_urb(dev->urb_irq, udev, pipe, dev->irq_data,
746 USB_PKT_LEN,
747 cm109_urb_irq_callback, dev, endpoint->bInterval);
748 dev->urb_irq->transfer_dma = dev->irq_dma;
749 dev->urb_irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
750 dev->urb_irq->dev = udev;
751
752 /* initialise ctl urb */
753 dev->ctl_req->bRequestType = USB_TYPE_CLASS | USB_RECIP_INTERFACE |
754 USB_DIR_OUT;
755 dev->ctl_req->bRequest = USB_REQ_SET_CONFIGURATION;
756 dev->ctl_req->wValue = cpu_to_le16(0x200);
757 dev->ctl_req->wIndex = cpu_to_le16(interface->desc.bInterfaceNumber);
758 dev->ctl_req->wLength = cpu_to_le16(USB_PKT_LEN);
759
760 usb_fill_control_urb(dev->urb_ctl, udev, usb_sndctrlpipe(udev, 0),
761 (void *)dev->ctl_req, dev->ctl_data, USB_PKT_LEN,
762 cm109_urb_ctl_callback, dev);
763 dev->urb_ctl->transfer_dma = dev->ctl_dma;
764 dev->urb_ctl->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
765 dev->urb_ctl->dev = udev;
766
767 /* find out the physical bus location */
768 usb_make_path(udev, dev->phys, sizeof(dev->phys));
769 strlcat(dev->phys, "/input0", sizeof(dev->phys));
770
771 /* register settings for the input device */
772 input_dev->name = nfo->name;
773 input_dev->phys = dev->phys;
774 usb_to_input_id(udev, &input_dev->id);
775 input_dev->dev.parent = &intf->dev;
776
777 input_set_drvdata(input_dev, dev);
778 input_dev->open = cm109_input_open;
779 input_dev->close = cm109_input_close;
780 input_dev->event = cm109_input_ev;
781
782 input_dev->keycode = dev->keymap;
783 input_dev->keycodesize = sizeof(unsigned char);
784 input_dev->keycodemax = ARRAY_SIZE(dev->keymap);
785
786 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_SND);
787 input_dev->sndbit[0] = BIT_MASK(SND_BELL) | BIT_MASK(SND_TONE);
788
789 /* register available key events */
790 for (i = 0; i < KEYMAP_SIZE; i++) {
791 unsigned short k = keymap(i);
792 dev->keymap[i] = k;
793 __set_bit(k, input_dev->keybit);
794 }
795 __clear_bit(KEY_RESERVED, input_dev->keybit);
796
797 error = input_register_device(dev->idev);
798 if (error)
799 goto err_out;
800
801 usb_set_intfdata(intf, dev);
802
803 return 0;
804
805 err_out:
806 input_free_device(input_dev);
807 cm109_usb_cleanup(dev);
808 return error;
809 }
810
cm109_usb_suspend(struct usb_interface * intf,pm_message_t message)811 static int cm109_usb_suspend(struct usb_interface *intf, pm_message_t message)
812 {
813 struct cm109_dev *dev = usb_get_intfdata(intf);
814
815 dev_info(&intf->dev, "cm109: usb_suspend (event=%d)\n", message.event);
816
817 guard(mutex)(&dev->pm_mutex);
818
819 cm109_stop_traffic(dev);
820
821 return 0;
822 }
823
cm109_usb_resume(struct usb_interface * intf)824 static int cm109_usb_resume(struct usb_interface *intf)
825 {
826 struct cm109_dev *dev = usb_get_intfdata(intf);
827
828 dev_info(&intf->dev, "cm109: usb_resume\n");
829
830 guard(mutex)(&dev->pm_mutex);
831
832 cm109_restore_state(dev);
833
834 return 0;
835 }
836
cm109_usb_pre_reset(struct usb_interface * intf)837 static int cm109_usb_pre_reset(struct usb_interface *intf)
838 {
839 struct cm109_dev *dev = usb_get_intfdata(intf);
840
841 mutex_lock(&dev->pm_mutex);
842
843 /*
844 * Make sure input events don't try to toggle buzzer
845 * while we are resetting
846 */
847 dev->resetting = 1;
848 smp_wmb();
849
850 cm109_stop_traffic(dev);
851
852 return 0;
853 }
854
cm109_usb_post_reset(struct usb_interface * intf)855 static int cm109_usb_post_reset(struct usb_interface *intf)
856 {
857 struct cm109_dev *dev = usb_get_intfdata(intf);
858
859 dev->resetting = 0;
860 smp_wmb();
861
862 cm109_restore_state(dev);
863
864 mutex_unlock(&dev->pm_mutex);
865
866 return 0;
867 }
868
869 static struct usb_driver cm109_driver = {
870 .name = "cm109",
871 .probe = cm109_usb_probe,
872 .disconnect = cm109_usb_disconnect,
873 .suspend = cm109_usb_suspend,
874 .resume = cm109_usb_resume,
875 .reset_resume = cm109_usb_resume,
876 .pre_reset = cm109_usb_pre_reset,
877 .post_reset = cm109_usb_post_reset,
878 .id_table = cm109_usb_table,
879 .supports_autosuspend = 1,
880 };
881
cm109_select_keymap(void)882 static int __init cm109_select_keymap(void)
883 {
884 /* Load the phone keymap */
885 if (!strcasecmp(phone, "kip1000")) {
886 keymap = keymap_kip1000;
887 printk(KERN_INFO KBUILD_MODNAME ": "
888 "Keymap for Komunikate KIP1000 phone loaded\n");
889 } else if (!strcasecmp(phone, "gtalk")) {
890 keymap = keymap_gtalk;
891 printk(KERN_INFO KBUILD_MODNAME ": "
892 "Keymap for Genius G-talk phone loaded\n");
893 } else if (!strcasecmp(phone, "usbph01")) {
894 keymap = keymap_usbph01;
895 printk(KERN_INFO KBUILD_MODNAME ": "
896 "Keymap for Allied-Telesis Corega USBPH01 phone loaded\n");
897 } else if (!strcasecmp(phone, "atcom")) {
898 keymap = keymap_atcom;
899 printk(KERN_INFO KBUILD_MODNAME ": "
900 "Keymap for ATCom AU-100 phone loaded\n");
901 } else {
902 printk(KERN_ERR KBUILD_MODNAME ": "
903 "Unsupported phone: %s\n", phone);
904 return -EINVAL;
905 }
906
907 return 0;
908 }
909
cm109_init(void)910 static int __init cm109_init(void)
911 {
912 int err;
913
914 err = cm109_select_keymap();
915 if (err)
916 return err;
917
918 err = usb_register(&cm109_driver);
919 if (err)
920 return err;
921
922 printk(KERN_INFO KBUILD_MODNAME ": "
923 DRIVER_DESC ": " DRIVER_VERSION " (C) " DRIVER_AUTHOR "\n");
924
925 return 0;
926 }
927
cm109_exit(void)928 static void __exit cm109_exit(void)
929 {
930 usb_deregister(&cm109_driver);
931 }
932
933 module_init(cm109_init);
934 module_exit(cm109_exit);
935
936 MODULE_DEVICE_TABLE(usb, cm109_usb_table);
937
938 MODULE_AUTHOR(DRIVER_AUTHOR);
939 MODULE_DESCRIPTION(DRIVER_DESC);
940 MODULE_LICENSE("GPL");
941