?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
PM / sleep: Asynchronous threads for suspend_noirq
[linux/fpc-iii.git] / drivers / media / usb / em28xx / em28xx-input.c
blob18f65d89d4bc783a5005fc7b3aaa2b196c1c9904
1 /*
2 handle em28xx IR remotes via linux kernel input layer.
3
4 Copyright (C) 2005 Ludovico Cavedon <cavedon@sssup.it>
5 Markus Rechberger <mrechberger@gmail.com>
6 Mauro Carvalho Chehab <mchehab@infradead.org>
7 Sascha Sommer <saschasommer@freenet.de>
8
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
13
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
18
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 */
23
24 #include <linux/module.h>
25 #include <linux/init.h>
26 #include <linux/delay.h>
27 #include <linux/interrupt.h>
28 #include <linux/usb.h>
29 #include <linux/slab.h>
30
31 #include "em28xx.h"
32
33 #define EM28XX_SNAPSHOT_KEY KEY_CAMERA
34 #define EM28XX_BUTTONS_DEBOUNCED_QUERY_INTERVAL 500 /* [ms] */
35 #define EM28XX_BUTTONS_VOLATILE_QUERY_INTERVAL 100 /* [ms] */
36
37 static unsigned int ir_debug;
38 module_param(ir_debug, int, 0644);
39 MODULE_PARM_DESC(ir_debug, "enable debug messages [IR]");
40
41 #define MODULE_NAME "em28xx"
42
43 #define dprintk(fmt, arg...) \
44 if (ir_debug) { \
45 printk(KERN_DEBUG "%s/ir: " fmt, ir->name , ## arg); \
46 }
47
48 /**********************************************************
49 Polling structure used by em28xx IR's
50 **********************************************************/
51
52 struct em28xx_ir_poll_result {
53 unsigned int toggle_bit:1;
54 unsigned int read_count:7;
55
56 u32 scancode;
57 };
58
59 struct em28xx_IR {
60 struct em28xx *dev;
61 struct rc_dev *rc;
62 char name[32];
63 char phys[32];
64
65 /* poll decoder */
66 int polling;
67 struct delayed_work work;
68 unsigned int full_code:1;
69 unsigned int last_readcount;
70 u64 rc_type;
71
72 /* i2c slave address of external device (if used) */
73 u16 i2c_dev_addr;
74
75 int (*get_key_i2c)(struct i2c_client *, u32 *);
76 int (*get_key)(struct em28xx_IR *, struct em28xx_ir_poll_result *);
77 };
78
79 /**********************************************************
80 I2C IR based get keycodes - should be used with ir-kbd-i2c
81 **********************************************************/
82
83 static int em28xx_get_key_terratec(struct i2c_client *i2c_dev, u32 *ir_key)
84 {
85 unsigned char b;
86
87 /* poll IR chip */
88 if (1 != i2c_master_recv(i2c_dev, &b, 1))
89 return -EIO;
90
91 /* it seems that 0xFE indicates that a button is still hold
92 down, while 0xff indicates that no button is hold down. */
93
94 if (b == 0xff)
95 return 0;
96
97 if (b == 0xfe)
98 /* keep old data */
99 return 1;
100
101 *ir_key = b;
102 return 1;
103 }
104
105 static int em28xx_get_key_em_haup(struct i2c_client *i2c_dev, u32 *ir_key)
106 {
107 unsigned char buf[2];
108 u16 code;
109 int size;
110
111 /* poll IR chip */
112 size = i2c_master_recv(i2c_dev, buf, sizeof(buf));
113
114 if (size != 2)
115 return -EIO;
116
117 /* Does eliminate repeated parity code */
118 if (buf[1] == 0xff)
119 return 0;
120
121 /*
122 * Rearranges bits to the right order.
123 * The bit order were determined experimentally by using
124 * The original Hauppauge Grey IR and another RC5 that uses addr=0x08
125 * The RC5 code has 14 bits, but we've experimentally determined
126 * the meaning for only 11 bits.
127 * So, the code translation is not complete. Yet, it is enough to
128 * work with the provided RC5 IR.
129 */
130 code =
131 ((buf[0] & 0x01) ? 0x0020 : 0) | /* 0010 0000 */
132 ((buf[0] & 0x02) ? 0x0010 : 0) | /* 0001 0000 */
133 ((buf[0] & 0x04) ? 0x0008 : 0) | /* 0000 1000 */
134 ((buf[0] & 0x08) ? 0x0004 : 0) | /* 0000 0100 */
135 ((buf[0] & 0x10) ? 0x0002 : 0) | /* 0000 0010 */
136 ((buf[0] & 0x20) ? 0x0001 : 0) | /* 0000 0001 */
137 ((buf[1] & 0x08) ? 0x1000 : 0) | /* 0001 0000 */
138 ((buf[1] & 0x10) ? 0x0800 : 0) | /* 0000 1000 */
139 ((buf[1] & 0x20) ? 0x0400 : 0) | /* 0000 0100 */
140 ((buf[1] & 0x40) ? 0x0200 : 0) | /* 0000 0010 */
141 ((buf[1] & 0x80) ? 0x0100 : 0); /* 0000 0001 */
142
143 /* return key */
144 *ir_key = code;
145 return 1;
146 }
147
148 static int em28xx_get_key_pinnacle_usb_grey(struct i2c_client *i2c_dev,
149 u32 *ir_key)
150 {
151 unsigned char buf[3];
152
153 /* poll IR chip */
154
155 if (3 != i2c_master_recv(i2c_dev, buf, 3))
156 return -EIO;
157
158 if (buf[0] != 0x00)
159 return 0;
160
161 *ir_key = buf[2]&0x3f;
162
163 return 1;
164 }
165
166 static int em28xx_get_key_winfast_usbii_deluxe(struct i2c_client *i2c_dev,
167 u32 *ir_key)
168 {
169 unsigned char subaddr, keydetect, key;
170
171 struct i2c_msg msg[] = { { .addr = i2c_dev->addr, .flags = 0, .buf = &subaddr, .len = 1},
172 { .addr = i2c_dev->addr, .flags = I2C_M_RD, .buf = &keydetect, .len = 1} };
173
174 subaddr = 0x10;
175 if (2 != i2c_transfer(i2c_dev->adapter, msg, 2))
176 return -EIO;
177 if (keydetect == 0x00)
178 return 0;
179
180 subaddr = 0x00;
181 msg[1].buf = &key;
182 if (2 != i2c_transfer(i2c_dev->adapter, msg, 2))
183 return -EIO;
184 if (key == 0x00)
185 return 0;
186
187 *ir_key = key;
188 return 1;
189 }
190
191 /**********************************************************
192 Poll based get keycode functions
193 **********************************************************/
194
195 /* This is for the em2860/em2880 */
196 static int default_polling_getkey(struct em28xx_IR *ir,
197 struct em28xx_ir_poll_result *poll_result)
198 {
199 struct em28xx *dev = ir->dev;
200 int rc;
201 u8 msg[3] = { 0, 0, 0 };
202
203 /* Read key toggle, brand, and key code
204 on registers 0x45, 0x46 and 0x47
205 */
206 rc = dev->em28xx_read_reg_req_len(dev, 0, EM28XX_R45_IR,
207 msg, sizeof(msg));
208 if (rc < 0)
209 return rc;
210
211 /* Infrared toggle (Reg 0x45[7]) */
212 poll_result->toggle_bit = (msg[0] >> 7);
213
214 /* Infrared read count (Reg 0x45[6:0] */
215 poll_result->read_count = (msg[0] & 0x7f);
216
217 /* Remote Control Address/Data (Regs 0x46/0x47) */
218 poll_result->scancode = msg[1] << 8 | msg[2];
219
220 return 0;
221 }
222
223 static int em2874_polling_getkey(struct em28xx_IR *ir,
224 struct em28xx_ir_poll_result *poll_result)
225 {
226 struct em28xx *dev = ir->dev;
227 int rc;
228 u8 msg[5] = { 0, 0, 0, 0, 0 };
229
230 /* Read key toggle, brand, and key code
231 on registers 0x51-55
232 */
233 rc = dev->em28xx_read_reg_req_len(dev, 0, EM2874_R51_IR,
234 msg, sizeof(msg));
235 if (rc < 0)
236 return rc;
237
238 /* Infrared toggle (Reg 0x51[7]) */
239 poll_result->toggle_bit = (msg[0] >> 7);
240
241 /* Infrared read count (Reg 0x51[6:0] */
242 poll_result->read_count = (msg[0] & 0x7f);
243
244 /*
245 * Remote Control Address (Reg 0x52)
246 * Remote Control Data (Reg 0x53-0x55)
247 */
248 switch (ir->rc_type) {
249 case RC_BIT_RC5:
250 poll_result->scancode = msg[1] << 8 | msg[2];
251 break;
252 case RC_BIT_NEC:
253 if ((msg[3] ^ msg[4]) != 0xff) /* 32 bits NEC */
254 poll_result->scancode = (msg[1] << 24) |
255 (msg[2] << 16) |
256 (msg[3] << 8) |
257 msg[4];
258 else if ((msg[1] ^ msg[2]) != 0xff) /* 24 bits NEC */
259 poll_result->scancode = (msg[1] << 16) |
260 (msg[2] << 8) |
261 msg[3];
262 else /* Normal NEC */
263 poll_result->scancode = msg[1] << 8 | msg[3];
264 break;
265 case RC_BIT_RC6_0:
266 poll_result->scancode = msg[1] << 8 | msg[2];
267 break;
268 default:
269 poll_result->scancode = (msg[1] << 24) | (msg[2] << 16) |
270 (msg[3] << 8) | msg[4];
271 break;
272 }
273
274 return 0;
275 }
276
277 /**********************************************************
278 Polling code for em28xx
279 **********************************************************/
280
281 static int em28xx_i2c_ir_handle_key(struct em28xx_IR *ir)
282 {
283 struct em28xx *dev = ir->dev;
284 static u32 ir_key;
285 int rc;
286 struct i2c_client client;
287
288 client.adapter = &ir->dev->i2c_adap[dev->def_i2c_bus];
289 client.addr = ir->i2c_dev_addr;
290
291 rc = ir->get_key_i2c(&client, &ir_key);
292 if (rc < 0) {
293 dprintk("ir->get_key_i2c() failed: %d\n", rc);
294 return rc;
295 }
296
297 if (rc) {
298 dprintk("%s: keycode = 0x%04x\n", __func__, ir_key);
299 rc_keydown(ir->rc, ir_key, 0);
300 }
301 return 0;
302 }
303
304 static void em28xx_ir_handle_key(struct em28xx_IR *ir)
305 {
306 int result;
307 struct em28xx_ir_poll_result poll_result;
308
309 /* read the registers containing the IR status */
310 result = ir->get_key(ir, &poll_result);
311 if (unlikely(result < 0)) {
312 dprintk("ir->get_key() failed: %d\n", result);
313 return;
314 }
315
316 if (unlikely(poll_result.read_count != ir->last_readcount)) {
317 dprintk("%s: toggle: %d, count: %d, key 0x%04x\n", __func__,
318 poll_result.toggle_bit, poll_result.read_count,
319 poll_result.scancode);
320 if (ir->full_code)
321 rc_keydown(ir->rc,
322 poll_result.scancode,
323 poll_result.toggle_bit);
324 else
325 rc_keydown(ir->rc,
326 poll_result.scancode & 0xff,
327 poll_result.toggle_bit);
328
329 if (ir->dev->chip_id == CHIP_ID_EM2874 ||
330 ir->dev->chip_id == CHIP_ID_EM2884)
331 /* The em2874 clears the readcount field every time the
332 register is read. The em2860/2880 datasheet says that it
333 is supposed to clear the readcount, but it doesn't. So with
334 the em2874, we are looking for a non-zero read count as
335 opposed to a readcount that is incrementing */
336 ir->last_readcount = 0;
337 else
338 ir->last_readcount = poll_result.read_count;
339 }
340 }
341
342 static void em28xx_ir_work(struct work_struct *work)
343 {
344 struct em28xx_IR *ir = container_of(work, struct em28xx_IR, work.work);
345
346 if (ir->i2c_dev_addr) /* external i2c device */
347 em28xx_i2c_ir_handle_key(ir);
348 else /* internal device */
349 em28xx_ir_handle_key(ir);
350 schedule_delayed_work(&ir->work, msecs_to_jiffies(ir->polling));
351 }
352
353 static int em28xx_ir_start(struct rc_dev *rc)
354 {
355 struct em28xx_IR *ir = rc->priv;
356
357 INIT_DELAYED_WORK(&ir->work, em28xx_ir_work);
358 schedule_delayed_work(&ir->work, 0);
359
360 return 0;
361 }
362
363 static void em28xx_ir_stop(struct rc_dev *rc)
364 {
365 struct em28xx_IR *ir = rc->priv;
366
367 cancel_delayed_work_sync(&ir->work);
368 }
369
370 static int em2860_ir_change_protocol(struct rc_dev *rc_dev, u64 *rc_type)
371 {
372 struct em28xx_IR *ir = rc_dev->priv;
373 struct em28xx *dev = ir->dev;
374
375 /* Adjust xclk based on IR table for RC5/NEC tables */
376 if (*rc_type & RC_BIT_RC5) {
377 dev->board.xclk |= EM28XX_XCLK_IR_RC5_MODE;
378 ir->full_code = 1;
379 *rc_type = RC_BIT_RC5;
380 } else if (*rc_type & RC_BIT_NEC) {
381 dev->board.xclk &= ~EM28XX_XCLK_IR_RC5_MODE;
382 ir->full_code = 1;
383 *rc_type = RC_BIT_NEC;
384 } else if (*rc_type & RC_BIT_UNKNOWN) {
385 *rc_type = RC_BIT_UNKNOWN;
386 } else {
387 *rc_type = ir->rc_type;
388 return -EINVAL;
389 }
390 em28xx_write_reg_bits(dev, EM28XX_R0F_XCLK, dev->board.xclk,
391 EM28XX_XCLK_IR_RC5_MODE);
392
393 ir->rc_type = *rc_type;
394
395 return 0;
396 }
397
398 static int em2874_ir_change_protocol(struct rc_dev *rc_dev, u64 *rc_type)
399 {
400 struct em28xx_IR *ir = rc_dev->priv;
401 struct em28xx *dev = ir->dev;
402 u8 ir_config = EM2874_IR_RC5;
403
404 /* Adjust xclk and set type based on IR table for RC5/NEC/RC6 tables */
405 if (*rc_type & RC_BIT_RC5) {
406 dev->board.xclk |= EM28XX_XCLK_IR_RC5_MODE;
407 ir->full_code = 1;
408 *rc_type = RC_BIT_RC5;
409 } else if (*rc_type & RC_BIT_NEC) {
410 dev->board.xclk &= ~EM28XX_XCLK_IR_RC5_MODE;
411 ir_config = EM2874_IR_NEC | EM2874_IR_NEC_NO_PARITY;
412 ir->full_code = 1;
413 *rc_type = RC_BIT_NEC;
414 } else if (*rc_type & RC_BIT_RC6_0) {
415 dev->board.xclk |= EM28XX_XCLK_IR_RC5_MODE;
416 ir_config = EM2874_IR_RC6_MODE_0;
417 ir->full_code = 1;
418 *rc_type = RC_BIT_RC6_0;
419 } else if (*rc_type & RC_BIT_UNKNOWN) {
420 *rc_type = RC_BIT_UNKNOWN;
421 } else {
422 *rc_type = ir->rc_type;
423 return -EINVAL;
424 }
425 em28xx_write_regs(dev, EM2874_R50_IR_CONFIG, &ir_config, 1);
426 em28xx_write_reg_bits(dev, EM28XX_R0F_XCLK, dev->board.xclk,
427 EM28XX_XCLK_IR_RC5_MODE);
428
429 ir->rc_type = *rc_type;
430
431 return 0;
432 }
433 static int em28xx_ir_change_protocol(struct rc_dev *rc_dev, u64 *rc_type)
434 {
435 struct em28xx_IR *ir = rc_dev->priv;
436 struct em28xx *dev = ir->dev;
437
438 /* Setup the proper handler based on the chip */
439 switch (dev->chip_id) {
440 case CHIP_ID_EM2860:
441 case CHIP_ID_EM2883:
442 return em2860_ir_change_protocol(rc_dev, rc_type);
443 case CHIP_ID_EM2884:
444 case CHIP_ID_EM2874:
445 case CHIP_ID_EM28174:
446 case CHIP_ID_EM28178:
447 return em2874_ir_change_protocol(rc_dev, rc_type);
448 default:
449 printk("Unrecognized em28xx chip id 0x%02x: IR not supported\n",
450 dev->chip_id);
451 return -EINVAL;
452 }
453 }
454
455 static int em28xx_probe_i2c_ir(struct em28xx *dev)
456 {
457 int i = 0;
458 /* Leadtek winfast tv USBII deluxe can find a non working IR-device */
459 /* at address 0x18, so if that address is needed for another board in */
460 /* the future, please put it after 0x1f. */
461 const unsigned short addr_list[] = {
462 0x1f, 0x30, 0x47, I2C_CLIENT_END
463 };
464
465 while (addr_list[i] != I2C_CLIENT_END) {
466 if (i2c_probe_func_quick_read(&dev->i2c_adap[dev->def_i2c_bus], addr_list[i]) == 1)
467 return addr_list[i];
468 i++;
469 }
470
471 return -ENODEV;
472 }
473
474 /**********************************************************
475 Handle buttons
476 **********************************************************/
477
478 static void em28xx_query_buttons(struct work_struct *work)
479 {
480 struct em28xx *dev =
481 container_of(work, struct em28xx, buttons_query_work.work);
482 u8 i, j;
483 int regval;
484 bool is_pressed, was_pressed;
485 const struct em28xx_led *led;
486
487 /* Poll and evaluate all addresses */
488 for (i = 0; i < dev->num_button_polling_addresses; i++) {
489 /* Read value from register */
490 regval = em28xx_read_reg(dev, dev->button_polling_addresses[i]);
491 if (regval < 0)
492 continue;
493 /* Check states of the buttons and act */
494 j = 0;
495 while (dev->board.buttons[j].role >= 0 &&
496 dev->board.buttons[j].role < EM28XX_NUM_BUTTON_ROLES) {
497 struct em28xx_button *button = &dev->board.buttons[j];
498 /* Check if button uses the current address */
499 if (button->reg_r != dev->button_polling_addresses[i]) {
500 j++;
501 continue;
502 }
503 /* Determine if button is and was pressed last time */
504 is_pressed = regval & button->mask;
505 was_pressed = dev->button_polling_last_values[i]
506 & button->mask;
507 if (button->inverted) {
508 is_pressed = !is_pressed;
509 was_pressed = !was_pressed;
510 }
511 /* Clear button state (if needed) */
512 if (is_pressed && button->reg_clearing)
513 em28xx_write_reg(dev, button->reg_clearing,
514 (~regval & button->mask)
515 | (regval & ~button->mask));
516 /* Handle button state */
517 if (!is_pressed || was_pressed) {
518 j++;
519 continue;
520 }
521 switch (button->role) {
522 case EM28XX_BUTTON_SNAPSHOT:
523 /* Emulate the keypress */
524 input_report_key(dev->sbutton_input_dev,
525 EM28XX_SNAPSHOT_KEY, 1);
526 /* Unpress the key */
527 input_report_key(dev->sbutton_input_dev,
528 EM28XX_SNAPSHOT_KEY, 0);
529 break;
530 case EM28XX_BUTTON_ILLUMINATION:
531 led = em28xx_find_led(dev,
532 EM28XX_LED_ILLUMINATION);
533 /* Switch illumination LED on/off */
534 if (led)
535 em28xx_toggle_reg_bits(dev,
536 led->gpio_reg,
537 led->gpio_mask);
538 break;
539 default:
540 WARN_ONCE(1, "BUG: unhandled button role.");
541 }
542 /* Next button */
543 j++;
544 }
545 /* Save current value for comparison during the next polling */
546 dev->button_polling_last_values[i] = regval;
547 }
548 /* Schedule next poll */
549 schedule_delayed_work(&dev->buttons_query_work,
550 msecs_to_jiffies(dev->button_polling_interval));
551 }
552
553 static int em28xx_register_snapshot_button(struct em28xx *dev)
554 {
555 struct input_dev *input_dev;
556 int err;
557
558 em28xx_info("Registering snapshot button...\n");
559 input_dev = input_allocate_device();
560 if (!input_dev)
561 return -ENOMEM;
562
563 usb_make_path(dev->udev, dev->snapshot_button_path,
564 sizeof(dev->snapshot_button_path));
565 strlcat(dev->snapshot_button_path, "/sbutton",
566 sizeof(dev->snapshot_button_path));
567
568 input_dev->name = "em28xx snapshot button";
569 input_dev->phys = dev->snapshot_button_path;
570 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP);
571 set_bit(EM28XX_SNAPSHOT_KEY, input_dev->keybit);
572 input_dev->keycodesize = 0;
573 input_dev->keycodemax = 0;
574 input_dev->id.bustype = BUS_USB;
575 input_dev->id.vendor = le16_to_cpu(dev->udev->descriptor.idVendor);
576 input_dev->id.product = le16_to_cpu(dev->udev->descriptor.idProduct);
577 input_dev->id.version = 1;
578 input_dev->dev.parent = &dev->udev->dev;
579
580 err = input_register_device(input_dev);
581 if (err) {
582 em28xx_errdev("input_register_device failed\n");
583 input_free_device(input_dev);
584 return err;
585 }
586
587 dev->sbutton_input_dev = input_dev;
588 return 0;
589 }
590
591 static void em28xx_init_buttons(struct em28xx *dev)
592 {
593 u8 i = 0, j = 0;
594 bool addr_new = 0;
595
596 dev->button_polling_interval = EM28XX_BUTTONS_DEBOUNCED_QUERY_INTERVAL;
597 while (dev->board.buttons[i].role >= 0 &&
598 dev->board.buttons[i].role < EM28XX_NUM_BUTTON_ROLES) {
599 struct em28xx_button *button = &dev->board.buttons[i];
600 /* Check if polling address is already on the list */
601 addr_new = 1;
602 for (j = 0; j < dev->num_button_polling_addresses; j++) {
603 if (button->reg_r == dev->button_polling_addresses[j]) {
604 addr_new = 0;
605 break;
606 }
607 }
608 /* Check if max. number of polling addresses is exceeded */
609 if (addr_new && dev->num_button_polling_addresses
610 >= EM28XX_NUM_BUTTON_ADDRESSES_MAX) {
611 WARN_ONCE(1, "BUG: maximum number of button polling addresses exceeded.");
612 goto next_button;
613 }
614 /* Button role specific checks and actions */
615 if (button->role == EM28XX_BUTTON_SNAPSHOT) {
616 /* Register input device */
617 if (em28xx_register_snapshot_button(dev) < 0)
618 goto next_button;
619 } else if (button->role == EM28XX_BUTTON_ILLUMINATION) {
620 /* Check sanity */
621 if (!em28xx_find_led(dev, EM28XX_LED_ILLUMINATION)) {
622 em28xx_errdev("BUG: illumination button defined, but no illumination LED.\n");
623 goto next_button;
624 }
625 }
626 /* Add read address to list of polling addresses */
627 if (addr_new) {
628 unsigned int index = dev->num_button_polling_addresses;
629 dev->button_polling_addresses[index] = button->reg_r;
630 dev->num_button_polling_addresses++;
631 }
632 /* Reduce polling interval if necessary */
633 if (!button->reg_clearing)
634 dev->button_polling_interval =
635 EM28XX_BUTTONS_VOLATILE_QUERY_INTERVAL;
636 next_button:
637 /* Next button */
638 i++;
639 }
640
641 /* Start polling */
642 if (dev->num_button_polling_addresses) {
643 memset(dev->button_polling_last_values, 0,
644 EM28XX_NUM_BUTTON_ADDRESSES_MAX);
645 INIT_DELAYED_WORK(&dev->buttons_query_work,
646 em28xx_query_buttons);
647 schedule_delayed_work(&dev->buttons_query_work,
648 msecs_to_jiffies(dev->button_polling_interval));
649 }
650 }
651
652 static void em28xx_shutdown_buttons(struct em28xx *dev)
653 {
654 /* Cancel polling */
655 cancel_delayed_work_sync(&dev->buttons_query_work);
656 /* Clear polling addresses list */
657 dev->num_button_polling_addresses = 0;
658 /* Deregister input devices */
659 if (dev->sbutton_input_dev != NULL) {
660 em28xx_info("Deregistering snapshot button\n");
661 input_unregister_device(dev->sbutton_input_dev);
662 dev->sbutton_input_dev = NULL;
663 }
664 }
665
666 static int em28xx_ir_init(struct em28xx *dev)
667 {
668 struct em28xx_IR *ir;
669 struct rc_dev *rc;
670 int err = -ENOMEM;
671 u64 rc_type;
672 u16 i2c_rc_dev_addr = 0;
673
674 if (dev->is_audio_only) {
675 /* Shouldn't initialize IR for this interface */
676 return 0;
677 }
678
679 if (dev->board.buttons)
680 em28xx_init_buttons(dev);
681
682 if (dev->board.has_ir_i2c) {
683 i2c_rc_dev_addr = em28xx_probe_i2c_ir(dev);
684 if (!i2c_rc_dev_addr) {
685 dev->board.has_ir_i2c = 0;
686 em28xx_warn("No i2c IR remote control device found.\n");
687 return -ENODEV;
688 }
689 }
690
691 if (dev->board.ir_codes == NULL && !dev->board.has_ir_i2c) {
692 /* No remote control support */
693 em28xx_warn("Remote control support is not available for "
694 "this card.\n");
695 return 0;
696 }
697
698 em28xx_info("Registering input extension\n");
699
700 ir = kzalloc(sizeof(*ir), GFP_KERNEL);
701 rc = rc_allocate_device();
702 if (!ir || !rc)
703 goto error;
704
705 /* record handles to ourself */
706 ir->dev = dev;
707 dev->ir = ir;
708 ir->rc = rc;
709
710 rc->priv = ir;
711 rc->open = em28xx_ir_start;
712 rc->close = em28xx_ir_stop;
713
714 if (dev->board.has_ir_i2c) { /* external i2c device */
715 switch (dev->model) {
716 case EM2800_BOARD_TERRATEC_CINERGY_200:
717 case EM2820_BOARD_TERRATEC_CINERGY_250:
718 rc->map_name = RC_MAP_EM_TERRATEC;
719 ir->get_key_i2c = em28xx_get_key_terratec;
720 break;
721 case EM2820_BOARD_PINNACLE_USB_2:
722 rc->map_name = RC_MAP_PINNACLE_GREY;
723 ir->get_key_i2c = em28xx_get_key_pinnacle_usb_grey;
724 break;
725 case EM2820_BOARD_HAUPPAUGE_WINTV_USB_2:
726 rc->map_name = RC_MAP_HAUPPAUGE;
727 ir->get_key_i2c = em28xx_get_key_em_haup;
728 rc->allowed_protos = RC_BIT_RC5;
729 break;
730 case EM2820_BOARD_LEADTEK_WINFAST_USBII_DELUXE:
731 rc->map_name = RC_MAP_WINFAST_USBII_DELUXE;
732 ir->get_key_i2c = em28xx_get_key_winfast_usbii_deluxe;
733 break;
734 default:
735 err = -ENODEV;
736 goto error;
737 }
738
739 ir->i2c_dev_addr = i2c_rc_dev_addr;
740 } else { /* internal device */
741 switch (dev->chip_id) {
742 case CHIP_ID_EM2860:
743 case CHIP_ID_EM2883:
744 rc->allowed_protos = RC_BIT_RC5 | RC_BIT_NEC;
745 ir->get_key = default_polling_getkey;
746 break;
747 case CHIP_ID_EM2884:
748 case CHIP_ID_EM2874:
749 case CHIP_ID_EM28174:
750 case CHIP_ID_EM28178:
751 ir->get_key = em2874_polling_getkey;
752 rc->allowed_protos = RC_BIT_RC5 | RC_BIT_NEC |
753 RC_BIT_RC6_0;
754 break;
755 default:
756 err = -ENODEV;
757 goto error;
758 }
759
760 rc->change_protocol = em28xx_ir_change_protocol;
761 rc->map_name = dev->board.ir_codes;
762
763 /* By default, keep protocol field untouched */
764 rc_type = RC_BIT_UNKNOWN;
765 err = em28xx_ir_change_protocol(rc, &rc_type);
766 if (err)
767 goto error;
768 }
769
770 /* This is how often we ask the chip for IR information */
771 ir->polling = 100; /* ms */
772
773 /* init input device */
774 snprintf(ir->name, sizeof(ir->name), "em28xx IR (%s)", dev->name);
775
776 usb_make_path(dev->udev, ir->phys, sizeof(ir->phys));
777 strlcat(ir->phys, "/input0", sizeof(ir->phys));
778
779 rc->input_name = ir->name;
780 rc->input_phys = ir->phys;
781 rc->input_id.bustype = BUS_USB;
782 rc->input_id.version = 1;
783 rc->input_id.vendor = le16_to_cpu(dev->udev->descriptor.idVendor);
784 rc->input_id.product = le16_to_cpu(dev->udev->descriptor.idProduct);
785 rc->dev.parent = &dev->udev->dev;
786 rc->driver_name = MODULE_NAME;
787
788 /* all done */
789 err = rc_register_device(rc);
790 if (err)
791 goto error;
792
793 em28xx_info("Input extension successfully initalized\n");
794
795 return 0;
796
797 error:
798 dev->ir = NULL;
799 rc_free_device(rc);
800 kfree(ir);
801 return err;
802 }
803
804 static int em28xx_ir_fini(struct em28xx *dev)
805 {
806 struct em28xx_IR *ir = dev->ir;
807
808 if (dev->is_audio_only) {
809 /* Shouldn't initialize IR for this interface */
810 return 0;
811 }
812
813 em28xx_info("Closing input extension");
814
815 em28xx_shutdown_buttons(dev);
816
817 /* skip detach on non attached boards */
818 if (!ir)
819 return 0;
820
821 if (ir->rc)
822 rc_unregister_device(ir->rc);
823
824 /* done */
825 kfree(ir);
826 dev->ir = NULL;
827 return 0;
828 }
829
830 static struct em28xx_ops rc_ops = {
831 .id = EM28XX_RC,
832 .name = "Em28xx Input Extension",
833 .init = em28xx_ir_init,
834 .fini = em28xx_ir_fini,
835 };
836
837 static int __init em28xx_rc_register(void)
838 {
839 return em28xx_register_extension(&rc_ops);
840 }
841
842 static void __exit em28xx_rc_unregister(void)
843 {
844 em28xx_unregister_extension(&rc_ops);
845 }
846
847 MODULE_LICENSE("GPL");
848 MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@redhat.com>");
849 MODULE_DESCRIPTION(DRIVER_DESC " - input interface");
850 MODULE_VERSION(EM28XX_VERSION);
851
852 module_init(em28xx_rc_register);
853 module_exit(em28xx_rc_unregister);
Linux with added FPC-III support