1 | // SPDX-License-Identifier: GPL-2.0+ |
2 | // |
3 | // handle em28xx IR remotes via linux kernel input layer. |
4 | // |
5 | // Copyright (C) 2005 Ludovico Cavedon <cavedon@sssup.it> |
6 | // Markus Rechberger <mrechberger@gmail.com> |
7 | // Mauro Carvalho Chehab <mchehab@kernel.org> |
8 | // Sascha Sommer <saschasommer@freenet.de> |
9 | |
10 | #include "em28xx.h" |
11 | |
12 | #include <linux/module.h> |
13 | #include <linux/init.h> |
14 | #include <linux/delay.h> |
15 | #include <linux/interrupt.h> |
16 | #include <linux/usb.h> |
17 | #include <linux/usb/input.h> |
18 | #include <linux/slab.h> |
19 | #include <linux/bitrev.h> |
20 | |
21 | #define EM28XX_SNAPSHOT_KEY KEY_CAMERA |
22 | #define EM28XX_BUTTONS_DEBOUNCED_QUERY_INTERVAL 500 /* [ms] */ |
23 | #define EM28XX_BUTTONS_VOLATILE_QUERY_INTERVAL 100 /* [ms] */ |
24 | |
25 | static unsigned int ir_debug; |
26 | module_param(ir_debug, int, 0644); |
27 | MODULE_PARM_DESC(ir_debug, "enable debug messages [IR]" ); |
28 | |
29 | #define MODULE_NAME "em28xx" |
30 | |
31 | #define dprintk(fmt, arg...) do { \ |
32 | if (ir_debug) \ |
33 | dev_printk(KERN_DEBUG, &ir->dev->intf->dev, \ |
34 | "input: %s: " fmt, __func__, ## arg); \ |
35 | } while (0) |
36 | |
37 | /* |
38 | * Polling structure used by em28xx IR's |
39 | */ |
40 | |
41 | struct em28xx_ir_poll_result { |
42 | unsigned int toggle_bit:1; |
43 | unsigned int read_count:7; |
44 | |
45 | enum rc_proto protocol; |
46 | u32 scancode; |
47 | }; |
48 | |
49 | struct em28xx_IR { |
50 | struct em28xx *dev; |
51 | struct rc_dev *rc; |
52 | char phys[32]; |
53 | |
54 | /* poll decoder */ |
55 | int polling; |
56 | struct delayed_work work; |
57 | unsigned int full_code:1; |
58 | unsigned int last_readcount; |
59 | u64 rc_proto; |
60 | |
61 | struct i2c_client *i2c_client; |
62 | |
63 | int (*get_key_i2c)(struct i2c_client *ir, enum rc_proto *protocol, |
64 | u32 *scancode); |
65 | int (*get_key)(struct em28xx_IR *ir, struct em28xx_ir_poll_result *r); |
66 | }; |
67 | |
68 | /* |
69 | * I2C IR based get keycodes - should be used with ir-kbd-i2c |
70 | */ |
71 | |
72 | static int em28xx_get_key_terratec(struct i2c_client *i2c_dev, |
73 | enum rc_proto *protocol, u32 *scancode) |
74 | { |
75 | int rc; |
76 | unsigned char b; |
77 | |
78 | /* poll IR chip */ |
79 | rc = i2c_master_recv(client: i2c_dev, buf: &b, count: 1); |
80 | if (rc != 1) { |
81 | if (rc < 0) |
82 | return rc; |
83 | return -EIO; |
84 | } |
85 | |
86 | /* |
87 | * it seems that 0xFE indicates that a button is still hold |
88 | * down, while 0xff indicates that no button is hold down. |
89 | */ |
90 | |
91 | if (b == 0xff) |
92 | return 0; |
93 | |
94 | if (b == 0xfe) |
95 | /* keep old data */ |
96 | return 1; |
97 | |
98 | *protocol = RC_PROTO_UNKNOWN; |
99 | *scancode = b; |
100 | return 1; |
101 | } |
102 | |
103 | static int em28xx_get_key_em_haup(struct i2c_client *i2c_dev, |
104 | enum rc_proto *protocol, u32 *scancode) |
105 | { |
106 | unsigned char buf[2]; |
107 | int size; |
108 | |
109 | /* poll IR chip */ |
110 | size = i2c_master_recv(client: i2c_dev, buf, count: sizeof(buf)); |
111 | |
112 | if (size != 2) |
113 | return -EIO; |
114 | |
115 | /* Does eliminate repeated parity code */ |
116 | if (buf[1] == 0xff) |
117 | return 0; |
118 | |
119 | /* |
120 | * Rearranges bits to the right order. |
121 | * The bit order were determined experimentally by using |
122 | * The original Hauppauge Grey IR and another RC5 that uses addr=0x08 |
123 | * The RC5 code has 14 bits, but we've experimentally determined |
124 | * the meaning for only 11 bits. |
125 | * So, the code translation is not complete. Yet, it is enough to |
126 | * work with the provided RC5 IR. |
127 | */ |
128 | *protocol = RC_PROTO_RC5; |
129 | *scancode = (bitrev8(buf[1]) & 0x1f) << 8 | bitrev8(buf[0]) >> 2; |
130 | return 1; |
131 | } |
132 | |
133 | static int em28xx_get_key_pinnacle_usb_grey(struct i2c_client *i2c_dev, |
134 | enum rc_proto *protocol, |
135 | u32 *scancode) |
136 | { |
137 | unsigned char buf[3]; |
138 | |
139 | /* poll IR chip */ |
140 | |
141 | if (i2c_master_recv(client: i2c_dev, buf, count: 3) != 3) |
142 | return -EIO; |
143 | |
144 | if (buf[0] != 0x00) |
145 | return 0; |
146 | |
147 | *protocol = RC_PROTO_UNKNOWN; |
148 | *scancode = buf[2] & 0x3f; |
149 | return 1; |
150 | } |
151 | |
152 | static int em28xx_get_key_winfast_usbii_deluxe(struct i2c_client *i2c_dev, |
153 | enum rc_proto *protocol, |
154 | u32 *scancode) |
155 | { |
156 | unsigned char subaddr, keydetect, key; |
157 | |
158 | struct i2c_msg msg[] = { |
159 | { |
160 | .addr = i2c_dev->addr, |
161 | .flags = 0, |
162 | .buf = &subaddr, .len = 1 |
163 | }, { |
164 | .addr = i2c_dev->addr, |
165 | .flags = I2C_M_RD, |
166 | .buf = &keydetect, |
167 | .len = 1 |
168 | } |
169 | }; |
170 | |
171 | subaddr = 0x10; |
172 | if (i2c_transfer(adap: i2c_dev->adapter, msgs: msg, num: 2) != 2) |
173 | return -EIO; |
174 | if (keydetect == 0x00) |
175 | return 0; |
176 | |
177 | subaddr = 0x00; |
178 | msg[1].buf = &key; |
179 | if (i2c_transfer(adap: i2c_dev->adapter, msgs: msg, num: 2) != 2) |
180 | return -EIO; |
181 | if (key == 0x00) |
182 | return 0; |
183 | |
184 | *protocol = RC_PROTO_UNKNOWN; |
185 | *scancode = key; |
186 | return 1; |
187 | } |
188 | |
189 | /* |
190 | * Poll based get keycode functions |
191 | */ |
192 | |
193 | /* This is for the em2860/em2880 */ |
194 | static int default_polling_getkey(struct em28xx_IR *ir, |
195 | struct em28xx_ir_poll_result *poll_result) |
196 | { |
197 | struct em28xx *dev = ir->dev; |
198 | int rc; |
199 | u8 msg[3] = { 0, 0, 0 }; |
200 | |
201 | /* |
202 | * Read key toggle, brand, and key code |
203 | * on registers 0x45, 0x46 and 0x47 |
204 | */ |
205 | rc = dev->em28xx_read_reg_req_len(dev, 0, EM28XX_R45_IR, |
206 | msg, sizeof(msg)); |
207 | if (rc < 0) |
208 | return rc; |
209 | |
210 | /* Infrared toggle (Reg 0x45[7]) */ |
211 | poll_result->toggle_bit = (msg[0] >> 7); |
212 | |
213 | /* Infrared read count (Reg 0x45[6:0] */ |
214 | poll_result->read_count = (msg[0] & 0x7f); |
215 | |
216 | /* Remote Control Address/Data (Regs 0x46/0x47) */ |
217 | switch (ir->rc_proto) { |
218 | case RC_PROTO_BIT_RC5: |
219 | poll_result->protocol = RC_PROTO_RC5; |
220 | poll_result->scancode = RC_SCANCODE_RC5(msg[1], msg[2]); |
221 | break; |
222 | |
223 | case RC_PROTO_BIT_NEC: |
224 | poll_result->protocol = RC_PROTO_NEC; |
225 | poll_result->scancode = RC_SCANCODE_NEC(msg[1], msg[2]); |
226 | break; |
227 | |
228 | default: |
229 | poll_result->protocol = RC_PROTO_UNKNOWN; |
230 | poll_result->scancode = msg[1] << 8 | msg[2]; |
231 | break; |
232 | } |
233 | |
234 | return 0; |
235 | } |
236 | |
237 | static int em2874_polling_getkey(struct em28xx_IR *ir, |
238 | struct em28xx_ir_poll_result *poll_result) |
239 | { |
240 | struct em28xx *dev = ir->dev; |
241 | int rc; |
242 | u8 msg[5] = { 0, 0, 0, 0, 0 }; |
243 | |
244 | /* |
245 | * Read key toggle, brand, and key code |
246 | * on registers 0x51-55 |
247 | */ |
248 | rc = dev->em28xx_read_reg_req_len(dev, 0, EM2874_R51_IR, |
249 | msg, sizeof(msg)); |
250 | if (rc < 0) |
251 | return rc; |
252 | |
253 | /* Infrared toggle (Reg 0x51[7]) */ |
254 | poll_result->toggle_bit = (msg[0] >> 7); |
255 | |
256 | /* Infrared read count (Reg 0x51[6:0] */ |
257 | poll_result->read_count = (msg[0] & 0x7f); |
258 | |
259 | /* |
260 | * Remote Control Address (Reg 0x52) |
261 | * Remote Control Data (Reg 0x53-0x55) |
262 | */ |
263 | switch (ir->rc_proto) { |
264 | case RC_PROTO_BIT_RC5: |
265 | poll_result->protocol = RC_PROTO_RC5; |
266 | poll_result->scancode = RC_SCANCODE_RC5(msg[1], msg[2]); |
267 | break; |
268 | |
269 | case RC_PROTO_BIT_NEC: |
270 | poll_result->scancode = ir_nec_bytes_to_scancode(address: msg[1], not_address: msg[2], command: msg[3], not_command: msg[4], |
271 | protocol: &poll_result->protocol); |
272 | break; |
273 | |
274 | case RC_PROTO_BIT_RC6_0: |
275 | poll_result->protocol = RC_PROTO_RC6_0; |
276 | poll_result->scancode = RC_SCANCODE_RC6_0(msg[1], msg[2]); |
277 | break; |
278 | |
279 | default: |
280 | poll_result->protocol = RC_PROTO_UNKNOWN; |
281 | poll_result->scancode = (msg[1] << 24) | (msg[2] << 16) | |
282 | (msg[3] << 8) | msg[4]; |
283 | break; |
284 | } |
285 | |
286 | return 0; |
287 | } |
288 | |
289 | /* |
290 | * Polling code for em28xx |
291 | */ |
292 | |
293 | static int em28xx_i2c_ir_handle_key(struct em28xx_IR *ir) |
294 | { |
295 | static u32 scancode; |
296 | enum rc_proto protocol; |
297 | int rc; |
298 | |
299 | rc = ir->get_key_i2c(ir->i2c_client, &protocol, &scancode); |
300 | if (rc < 0) { |
301 | dprintk("ir->get_key_i2c() failed: %d\n" , rc); |
302 | return rc; |
303 | } |
304 | |
305 | if (rc) { |
306 | dprintk("%s: proto = 0x%04x, scancode = 0x%04x\n" , |
307 | __func__, protocol, scancode); |
308 | rc_keydown(dev: ir->rc, protocol, scancode, toggle: 0); |
309 | } |
310 | return 0; |
311 | } |
312 | |
313 | static void em28xx_ir_handle_key(struct em28xx_IR *ir) |
314 | { |
315 | int result; |
316 | struct em28xx_ir_poll_result poll_result; |
317 | |
318 | /* read the registers containing the IR status */ |
319 | result = ir->get_key(ir, &poll_result); |
320 | if (unlikely(result < 0)) { |
321 | dprintk("ir->get_key() failed: %d\n" , result); |
322 | return; |
323 | } |
324 | |
325 | if (unlikely(poll_result.read_count != ir->last_readcount)) { |
326 | dprintk("%s: toggle: %d, count: %d, key 0x%04x\n" , __func__, |
327 | poll_result.toggle_bit, poll_result.read_count, |
328 | poll_result.scancode); |
329 | if (ir->full_code) |
330 | rc_keydown(dev: ir->rc, |
331 | protocol: poll_result.protocol, |
332 | scancode: poll_result.scancode, |
333 | toggle: poll_result.toggle_bit); |
334 | else |
335 | rc_keydown(dev: ir->rc, |
336 | protocol: RC_PROTO_UNKNOWN, |
337 | scancode: poll_result.scancode & 0xff, |
338 | toggle: poll_result.toggle_bit); |
339 | |
340 | if (ir->dev->chip_id == CHIP_ID_EM2874 || |
341 | ir->dev->chip_id == CHIP_ID_EM2884) |
342 | /* |
343 | * The em2874 clears the readcount field every time the |
344 | * register is read. The em2860/2880 datasheet says |
345 | * that it is supposed to clear the readcount, but it |
346 | * doesn't. So with the em2874, we are looking for a |
347 | * non-zero read count as opposed to a readcount |
348 | * that is incrementing |
349 | */ |
350 | ir->last_readcount = 0; |
351 | else |
352 | ir->last_readcount = poll_result.read_count; |
353 | } |
354 | } |
355 | |
356 | static void em28xx_ir_work(struct work_struct *work) |
357 | { |
358 | struct em28xx_IR *ir = container_of(work, struct em28xx_IR, work.work); |
359 | |
360 | if (ir->i2c_client) /* external i2c device */ |
361 | em28xx_i2c_ir_handle_key(ir); |
362 | else /* internal device */ |
363 | em28xx_ir_handle_key(ir); |
364 | schedule_delayed_work(dwork: &ir->work, delay: msecs_to_jiffies(m: ir->polling)); |
365 | } |
366 | |
367 | static int em28xx_ir_start(struct rc_dev *rc) |
368 | { |
369 | struct em28xx_IR *ir = rc->priv; |
370 | |
371 | INIT_DELAYED_WORK(&ir->work, em28xx_ir_work); |
372 | schedule_delayed_work(dwork: &ir->work, delay: 0); |
373 | |
374 | return 0; |
375 | } |
376 | |
377 | static void em28xx_ir_stop(struct rc_dev *rc) |
378 | { |
379 | struct em28xx_IR *ir = rc->priv; |
380 | |
381 | cancel_delayed_work_sync(dwork: &ir->work); |
382 | } |
383 | |
384 | static int em2860_ir_change_protocol(struct rc_dev *rc_dev, u64 *rc_proto) |
385 | { |
386 | struct em28xx_IR *ir = rc_dev->priv; |
387 | struct em28xx *dev = ir->dev; |
388 | |
389 | /* Adjust xclk based on IR table for RC5/NEC tables */ |
390 | if (*rc_proto & RC_PROTO_BIT_RC5) { |
391 | dev->board.xclk |= EM28XX_XCLK_IR_RC5_MODE; |
392 | ir->full_code = 1; |
393 | *rc_proto = RC_PROTO_BIT_RC5; |
394 | } else if (*rc_proto & RC_PROTO_BIT_NEC) { |
395 | dev->board.xclk &= ~EM28XX_XCLK_IR_RC5_MODE; |
396 | ir->full_code = 1; |
397 | *rc_proto = RC_PROTO_BIT_NEC; |
398 | } else if (*rc_proto & RC_PROTO_BIT_UNKNOWN) { |
399 | *rc_proto = RC_PROTO_BIT_UNKNOWN; |
400 | } else { |
401 | *rc_proto = ir->rc_proto; |
402 | return -EINVAL; |
403 | } |
404 | em28xx_write_reg_bits(dev, EM28XX_R0F_XCLK, val: dev->board.xclk, |
405 | EM28XX_XCLK_IR_RC5_MODE); |
406 | |
407 | ir->rc_proto = *rc_proto; |
408 | |
409 | return 0; |
410 | } |
411 | |
412 | static int em2874_ir_change_protocol(struct rc_dev *rc_dev, u64 *rc_proto) |
413 | { |
414 | struct em28xx_IR *ir = rc_dev->priv; |
415 | struct em28xx *dev = ir->dev; |
416 | u8 ir_config = EM2874_IR_RC5; |
417 | |
418 | /* Adjust xclk and set type based on IR table for RC5/NEC/RC6 tables */ |
419 | if (*rc_proto & RC_PROTO_BIT_RC5) { |
420 | dev->board.xclk |= EM28XX_XCLK_IR_RC5_MODE; |
421 | ir->full_code = 1; |
422 | *rc_proto = RC_PROTO_BIT_RC5; |
423 | } else if (*rc_proto & RC_PROTO_BIT_NEC) { |
424 | dev->board.xclk &= ~EM28XX_XCLK_IR_RC5_MODE; |
425 | ir_config = EM2874_IR_NEC | EM2874_IR_NEC_NO_PARITY; |
426 | ir->full_code = 1; |
427 | *rc_proto = RC_PROTO_BIT_NEC; |
428 | } else if (*rc_proto & RC_PROTO_BIT_RC6_0) { |
429 | dev->board.xclk |= EM28XX_XCLK_IR_RC5_MODE; |
430 | ir_config = EM2874_IR_RC6_MODE_0; |
431 | ir->full_code = 1; |
432 | *rc_proto = RC_PROTO_BIT_RC6_0; |
433 | } else if (*rc_proto & RC_PROTO_BIT_UNKNOWN) { |
434 | *rc_proto = RC_PROTO_BIT_UNKNOWN; |
435 | } else { |
436 | *rc_proto = ir->rc_proto; |
437 | return -EINVAL; |
438 | } |
439 | em28xx_write_regs(dev, EM2874_R50_IR_CONFIG, buf: &ir_config, len: 1); |
440 | em28xx_write_reg_bits(dev, EM28XX_R0F_XCLK, val: dev->board.xclk, |
441 | EM28XX_XCLK_IR_RC5_MODE); |
442 | |
443 | ir->rc_proto = *rc_proto; |
444 | |
445 | return 0; |
446 | } |
447 | |
448 | static int em28xx_ir_change_protocol(struct rc_dev *rc_dev, u64 *rc_proto) |
449 | { |
450 | struct em28xx_IR *ir = rc_dev->priv; |
451 | struct em28xx *dev = ir->dev; |
452 | |
453 | /* Setup the proper handler based on the chip */ |
454 | switch (dev->chip_id) { |
455 | case CHIP_ID_EM2860: |
456 | case CHIP_ID_EM2883: |
457 | return em2860_ir_change_protocol(rc_dev, rc_proto); |
458 | case CHIP_ID_EM2884: |
459 | case CHIP_ID_EM2874: |
460 | case CHIP_ID_EM28174: |
461 | case CHIP_ID_EM28178: |
462 | return em2874_ir_change_protocol(rc_dev, rc_proto); |
463 | default: |
464 | dev_err(&ir->dev->intf->dev, |
465 | "Unrecognized em28xx chip id 0x%02x: IR not supported\n" , |
466 | dev->chip_id); |
467 | return -EINVAL; |
468 | } |
469 | } |
470 | |
471 | static int em28xx_probe_i2c_ir(struct em28xx *dev) |
472 | { |
473 | int i = 0; |
474 | /* |
475 | * Leadtek winfast tv USBII deluxe can find a non working IR-device |
476 | * at address 0x18, so if that address is needed for another board in |
477 | * the future, please put it after 0x1f. |
478 | */ |
479 | static const unsigned short addr_list[] = { |
480 | 0x1f, 0x30, 0x47, I2C_CLIENT_END |
481 | }; |
482 | |
483 | while (addr_list[i] != I2C_CLIENT_END) { |
484 | if (i2c_probe_func_quick_read(adap: &dev->i2c_adap[dev->def_i2c_bus], |
485 | addr: addr_list[i]) == 1) |
486 | return addr_list[i]; |
487 | i++; |
488 | } |
489 | |
490 | return -ENODEV; |
491 | } |
492 | |
493 | /* |
494 | * Handle buttons |
495 | */ |
496 | |
497 | static void em28xx_query_buttons(struct work_struct *work) |
498 | { |
499 | struct em28xx *dev = |
500 | container_of(work, struct em28xx, buttons_query_work.work); |
501 | u8 i, j; |
502 | int regval; |
503 | bool is_pressed, was_pressed; |
504 | const struct em28xx_led *led; |
505 | |
506 | /* Poll and evaluate all addresses */ |
507 | for (i = 0; i < dev->num_button_polling_addresses; i++) { |
508 | /* Read value from register */ |
509 | regval = em28xx_read_reg(dev, reg: dev->button_polling_addresses[i]); |
510 | if (regval < 0) |
511 | continue; |
512 | /* Check states of the buttons and act */ |
513 | j = 0; |
514 | while (dev->board.buttons[j].role >= 0 && |
515 | dev->board.buttons[j].role < EM28XX_NUM_BUTTON_ROLES) { |
516 | const struct em28xx_button *button; |
517 | |
518 | button = &dev->board.buttons[j]; |
519 | |
520 | /* Check if button uses the current address */ |
521 | if (button->reg_r != dev->button_polling_addresses[i]) { |
522 | j++; |
523 | continue; |
524 | } |
525 | /* Determine if button is and was pressed last time */ |
526 | is_pressed = regval & button->mask; |
527 | was_pressed = dev->button_polling_last_values[i] |
528 | & button->mask; |
529 | if (button->inverted) { |
530 | is_pressed = !is_pressed; |
531 | was_pressed = !was_pressed; |
532 | } |
533 | /* Clear button state (if needed) */ |
534 | if (is_pressed && button->reg_clearing) |
535 | em28xx_write_reg(dev, reg: button->reg_clearing, |
536 | val: (~regval & button->mask) |
537 | | (regval & ~button->mask)); |
538 | /* Handle button state */ |
539 | if (!is_pressed || was_pressed) { |
540 | j++; |
541 | continue; |
542 | } |
543 | switch (button->role) { |
544 | case EM28XX_BUTTON_SNAPSHOT: |
545 | /* Emulate the keypress */ |
546 | input_report_key(dev: dev->sbutton_input_dev, |
547 | EM28XX_SNAPSHOT_KEY, value: 1); |
548 | /* Unpress the key */ |
549 | input_report_key(dev: dev->sbutton_input_dev, |
550 | EM28XX_SNAPSHOT_KEY, value: 0); |
551 | break; |
552 | case EM28XX_BUTTON_ILLUMINATION: |
553 | led = em28xx_find_led(dev, |
554 | role: EM28XX_LED_ILLUMINATION); |
555 | /* Switch illumination LED on/off */ |
556 | if (led) |
557 | em28xx_toggle_reg_bits(dev, |
558 | reg: led->gpio_reg, |
559 | bitmask: led->gpio_mask); |
560 | break; |
561 | default: |
562 | WARN_ONCE(1, "BUG: unhandled button role." ); |
563 | } |
564 | /* Next button */ |
565 | j++; |
566 | } |
567 | /* Save current value for comparison during the next polling */ |
568 | dev->button_polling_last_values[i] = regval; |
569 | } |
570 | /* Schedule next poll */ |
571 | schedule_delayed_work(dwork: &dev->buttons_query_work, |
572 | delay: msecs_to_jiffies(m: dev->button_polling_interval)); |
573 | } |
574 | |
575 | static int em28xx_register_snapshot_button(struct em28xx *dev) |
576 | { |
577 | struct usb_device *udev = interface_to_usbdev(dev->intf); |
578 | struct input_dev *input_dev; |
579 | int err; |
580 | |
581 | dev_info(&dev->intf->dev, "Registering snapshot button...\n" ); |
582 | input_dev = input_allocate_device(); |
583 | if (!input_dev) |
584 | return -ENOMEM; |
585 | |
586 | usb_make_path(dev: udev, buf: dev->snapshot_button_path, |
587 | size: sizeof(dev->snapshot_button_path)); |
588 | strlcat(p: dev->snapshot_button_path, q: "/sbutton" , |
589 | avail: sizeof(dev->snapshot_button_path)); |
590 | |
591 | input_dev->name = "em28xx snapshot button" ; |
592 | input_dev->phys = dev->snapshot_button_path; |
593 | input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP); |
594 | set_bit(EM28XX_SNAPSHOT_KEY, addr: input_dev->keybit); |
595 | input_dev->keycodesize = 0; |
596 | input_dev->keycodemax = 0; |
597 | usb_to_input_id(dev: udev, id: &input_dev->id); |
598 | input_dev->dev.parent = &dev->intf->dev; |
599 | |
600 | err = input_register_device(input_dev); |
601 | if (err) { |
602 | dev_err(&dev->intf->dev, "input_register_device failed\n" ); |
603 | input_free_device(dev: input_dev); |
604 | return err; |
605 | } |
606 | |
607 | dev->sbutton_input_dev = input_dev; |
608 | return 0; |
609 | } |
610 | |
611 | static void em28xx_init_buttons(struct em28xx *dev) |
612 | { |
613 | u8 i = 0, j = 0; |
614 | bool addr_new = false; |
615 | |
616 | dev->button_polling_interval = EM28XX_BUTTONS_DEBOUNCED_QUERY_INTERVAL; |
617 | while (dev->board.buttons[i].role >= 0 && |
618 | dev->board.buttons[i].role < EM28XX_NUM_BUTTON_ROLES) { |
619 | const struct em28xx_button *button = &dev->board.buttons[i]; |
620 | |
621 | /* Check if polling address is already on the list */ |
622 | addr_new = true; |
623 | for (j = 0; j < dev->num_button_polling_addresses; j++) { |
624 | if (button->reg_r == dev->button_polling_addresses[j]) { |
625 | addr_new = false; |
626 | break; |
627 | } |
628 | } |
629 | /* Check if max. number of polling addresses is exceeded */ |
630 | if (addr_new && dev->num_button_polling_addresses |
631 | >= EM28XX_NUM_BUTTON_ADDRESSES_MAX) { |
632 | WARN_ONCE(1, "BUG: maximum number of button polling addresses exceeded." ); |
633 | goto next_button; |
634 | } |
635 | /* Button role specific checks and actions */ |
636 | if (button->role == EM28XX_BUTTON_SNAPSHOT) { |
637 | /* Register input device */ |
638 | if (em28xx_register_snapshot_button(dev) < 0) |
639 | goto next_button; |
640 | } else if (button->role == EM28XX_BUTTON_ILLUMINATION) { |
641 | /* Check sanity */ |
642 | if (!em28xx_find_led(dev, role: EM28XX_LED_ILLUMINATION)) { |
643 | dev_err(&dev->intf->dev, |
644 | "BUG: illumination button defined, but no illumination LED.\n" ); |
645 | goto next_button; |
646 | } |
647 | } |
648 | /* Add read address to list of polling addresses */ |
649 | if (addr_new) { |
650 | unsigned int index = dev->num_button_polling_addresses; |
651 | |
652 | dev->button_polling_addresses[index] = button->reg_r; |
653 | dev->num_button_polling_addresses++; |
654 | } |
655 | /* Reduce polling interval if necessary */ |
656 | if (!button->reg_clearing) |
657 | dev->button_polling_interval = |
658 | EM28XX_BUTTONS_VOLATILE_QUERY_INTERVAL; |
659 | next_button: |
660 | /* Next button */ |
661 | i++; |
662 | } |
663 | |
664 | /* Start polling */ |
665 | if (dev->num_button_polling_addresses) { |
666 | memset(dev->button_polling_last_values, 0, |
667 | EM28XX_NUM_BUTTON_ADDRESSES_MAX); |
668 | schedule_delayed_work(dwork: &dev->buttons_query_work, |
669 | delay: msecs_to_jiffies(m: dev->button_polling_interval)); |
670 | } |
671 | } |
672 | |
673 | static void em28xx_shutdown_buttons(struct em28xx *dev) |
674 | { |
675 | /* Cancel polling */ |
676 | cancel_delayed_work_sync(dwork: &dev->buttons_query_work); |
677 | /* Clear polling addresses list */ |
678 | dev->num_button_polling_addresses = 0; |
679 | /* Deregister input devices */ |
680 | if (dev->sbutton_input_dev) { |
681 | dev_info(&dev->intf->dev, "Deregistering snapshot button\n" ); |
682 | input_unregister_device(dev->sbutton_input_dev); |
683 | dev->sbutton_input_dev = NULL; |
684 | } |
685 | } |
686 | |
687 | static int em28xx_ir_init(struct em28xx *dev) |
688 | { |
689 | struct usb_device *udev = interface_to_usbdev(dev->intf); |
690 | struct em28xx_IR *ir; |
691 | struct rc_dev *rc; |
692 | int err = -ENOMEM; |
693 | u64 rc_proto; |
694 | u16 i2c_rc_dev_addr = 0; |
695 | |
696 | if (dev->is_audio_only) { |
697 | /* Shouldn't initialize IR for this interface */ |
698 | return 0; |
699 | } |
700 | |
701 | kref_get(kref: &dev->ref); |
702 | INIT_DELAYED_WORK(&dev->buttons_query_work, em28xx_query_buttons); |
703 | |
704 | if (dev->board.buttons) |
705 | em28xx_init_buttons(dev); |
706 | |
707 | if (dev->board.has_ir_i2c) { |
708 | i2c_rc_dev_addr = em28xx_probe_i2c_ir(dev); |
709 | if (!i2c_rc_dev_addr) { |
710 | dev->board.has_ir_i2c = 0; |
711 | dev_warn(&dev->intf->dev, |
712 | "No i2c IR remote control device found.\n" ); |
713 | err = -ENODEV; |
714 | goto ref_put; |
715 | } |
716 | } |
717 | |
718 | if (!dev->board.ir_codes && !dev->board.has_ir_i2c) { |
719 | /* No remote control support */ |
720 | dev_warn(&dev->intf->dev, |
721 | "Remote control support is not available for this card.\n" ); |
722 | return 0; |
723 | } |
724 | |
725 | dev_info(&dev->intf->dev, "Registering input extension\n" ); |
726 | |
727 | ir = kzalloc(size: sizeof(*ir), GFP_KERNEL); |
728 | if (!ir) |
729 | goto ref_put; |
730 | rc = rc_allocate_device(RC_DRIVER_SCANCODE); |
731 | if (!rc) |
732 | goto error; |
733 | |
734 | /* record handles to ourself */ |
735 | ir->dev = dev; |
736 | dev->ir = ir; |
737 | ir->rc = rc; |
738 | |
739 | rc->priv = ir; |
740 | rc->open = em28xx_ir_start; |
741 | rc->close = em28xx_ir_stop; |
742 | |
743 | if (dev->board.has_ir_i2c) { /* external i2c device */ |
744 | switch (dev->model) { |
745 | case EM2800_BOARD_TERRATEC_CINERGY_200: |
746 | case EM2820_BOARD_TERRATEC_CINERGY_250: |
747 | rc->map_name = RC_MAP_EM_TERRATEC; |
748 | ir->get_key_i2c = em28xx_get_key_terratec; |
749 | break; |
750 | case EM2820_BOARD_PINNACLE_USB_2: |
751 | rc->map_name = RC_MAP_PINNACLE_GREY; |
752 | ir->get_key_i2c = em28xx_get_key_pinnacle_usb_grey; |
753 | break; |
754 | case EM2820_BOARD_HAUPPAUGE_WINTV_USB_2: |
755 | rc->map_name = RC_MAP_HAUPPAUGE; |
756 | ir->get_key_i2c = em28xx_get_key_em_haup; |
757 | rc->allowed_protocols = RC_PROTO_BIT_RC5; |
758 | break; |
759 | case EM2820_BOARD_LEADTEK_WINFAST_USBII_DELUXE: |
760 | rc->map_name = RC_MAP_WINFAST_USBII_DELUXE; |
761 | ir->get_key_i2c = em28xx_get_key_winfast_usbii_deluxe; |
762 | break; |
763 | default: |
764 | err = -ENODEV; |
765 | goto error; |
766 | } |
767 | |
768 | ir->i2c_client = kzalloc(size: sizeof(*ir->i2c_client), GFP_KERNEL); |
769 | if (!ir->i2c_client) |
770 | goto error; |
771 | ir->i2c_client->adapter = &ir->dev->i2c_adap[dev->def_i2c_bus]; |
772 | ir->i2c_client->addr = i2c_rc_dev_addr; |
773 | ir->i2c_client->flags = 0; |
774 | /* NOTE: all other fields of i2c_client are unused */ |
775 | } else { /* internal device */ |
776 | switch (dev->chip_id) { |
777 | case CHIP_ID_EM2860: |
778 | case CHIP_ID_EM2883: |
779 | rc->allowed_protocols = RC_PROTO_BIT_RC5 | |
780 | RC_PROTO_BIT_NEC; |
781 | ir->get_key = default_polling_getkey; |
782 | break; |
783 | case CHIP_ID_EM2884: |
784 | case CHIP_ID_EM2874: |
785 | case CHIP_ID_EM28174: |
786 | case CHIP_ID_EM28178: |
787 | ir->get_key = em2874_polling_getkey; |
788 | rc->allowed_protocols = RC_PROTO_BIT_RC5 | |
789 | RC_PROTO_BIT_NEC | RC_PROTO_BIT_NECX | |
790 | RC_PROTO_BIT_NEC32 | RC_PROTO_BIT_RC6_0; |
791 | break; |
792 | default: |
793 | err = -ENODEV; |
794 | goto error; |
795 | } |
796 | |
797 | rc->change_protocol = em28xx_ir_change_protocol; |
798 | rc->map_name = dev->board.ir_codes; |
799 | |
800 | /* By default, keep protocol field untouched */ |
801 | rc_proto = RC_PROTO_BIT_UNKNOWN; |
802 | err = em28xx_ir_change_protocol(rc_dev: rc, rc_proto: &rc_proto); |
803 | if (err) |
804 | goto error; |
805 | } |
806 | |
807 | /* This is how often we ask the chip for IR information */ |
808 | ir->polling = 100; /* ms */ |
809 | |
810 | usb_make_path(dev: udev, buf: ir->phys, size: sizeof(ir->phys)); |
811 | strlcat(p: ir->phys, q: "/input0" , avail: sizeof(ir->phys)); |
812 | |
813 | rc->device_name = em28xx_boards[dev->model].name; |
814 | rc->input_phys = ir->phys; |
815 | usb_to_input_id(dev: udev, id: &rc->input_id); |
816 | rc->dev.parent = &dev->intf->dev; |
817 | rc->driver_name = MODULE_NAME; |
818 | |
819 | /* all done */ |
820 | err = rc_register_device(dev: rc); |
821 | if (err) |
822 | goto error; |
823 | |
824 | dev_info(&dev->intf->dev, "Input extension successfully initialized\n" ); |
825 | |
826 | return 0; |
827 | |
828 | error: |
829 | kfree(objp: ir->i2c_client); |
830 | dev->ir = NULL; |
831 | rc_free_device(dev: rc); |
832 | kfree(objp: ir); |
833 | ref_put: |
834 | em28xx_shutdown_buttons(dev); |
835 | return err; |
836 | } |
837 | |
838 | static int em28xx_ir_fini(struct em28xx *dev) |
839 | { |
840 | struct em28xx_IR *ir = dev->ir; |
841 | |
842 | if (dev->is_audio_only) { |
843 | /* Shouldn't initialize IR for this interface */ |
844 | return 0; |
845 | } |
846 | |
847 | dev_info(&dev->intf->dev, "Closing input extension\n" ); |
848 | |
849 | em28xx_shutdown_buttons(dev); |
850 | |
851 | /* skip detach on non attached boards */ |
852 | if (!ir) |
853 | goto ref_put; |
854 | |
855 | rc_unregister_device(dev: ir->rc); |
856 | |
857 | kfree(objp: ir->i2c_client); |
858 | |
859 | /* done */ |
860 | kfree(objp: ir); |
861 | dev->ir = NULL; |
862 | |
863 | ref_put: |
864 | kref_put(kref: &dev->ref, release: em28xx_free_device); |
865 | |
866 | return 0; |
867 | } |
868 | |
869 | static int em28xx_ir_suspend(struct em28xx *dev) |
870 | { |
871 | struct em28xx_IR *ir = dev->ir; |
872 | |
873 | if (dev->is_audio_only) |
874 | return 0; |
875 | |
876 | dev_info(&dev->intf->dev, "Suspending input extension\n" ); |
877 | if (ir) |
878 | cancel_delayed_work_sync(dwork: &ir->work); |
879 | cancel_delayed_work_sync(dwork: &dev->buttons_query_work); |
880 | /* |
881 | * is canceling delayed work sufficient or does the rc event |
882 | * kthread needs stopping? kthread is stopped in |
883 | * ir_raw_event_unregister() |
884 | */ |
885 | return 0; |
886 | } |
887 | |
888 | static int em28xx_ir_resume(struct em28xx *dev) |
889 | { |
890 | struct em28xx_IR *ir = dev->ir; |
891 | |
892 | if (dev->is_audio_only) |
893 | return 0; |
894 | |
895 | dev_info(&dev->intf->dev, "Resuming input extension\n" ); |
896 | /* |
897 | * if suspend calls ir_raw_event_unregister(), the should call |
898 | * ir_raw_event_register() |
899 | */ |
900 | if (ir) |
901 | schedule_delayed_work(dwork: &ir->work, delay: msecs_to_jiffies(m: ir->polling)); |
902 | if (dev->num_button_polling_addresses) |
903 | schedule_delayed_work(dwork: &dev->buttons_query_work, |
904 | delay: msecs_to_jiffies(m: dev->button_polling_interval)); |
905 | return 0; |
906 | } |
907 | |
908 | static struct em28xx_ops rc_ops = { |
909 | .id = EM28XX_RC, |
910 | .name = "Em28xx Input Extension" , |
911 | .init = em28xx_ir_init, |
912 | .fini = em28xx_ir_fini, |
913 | .suspend = em28xx_ir_suspend, |
914 | .resume = em28xx_ir_resume, |
915 | }; |
916 | |
917 | static int __init em28xx_rc_register(void) |
918 | { |
919 | return em28xx_register_extension(dev: &rc_ops); |
920 | } |
921 | |
922 | static void __exit em28xx_rc_unregister(void) |
923 | { |
924 | em28xx_unregister_extension(dev: &rc_ops); |
925 | } |
926 | |
927 | MODULE_LICENSE("GPL v2" ); |
928 | MODULE_AUTHOR("Mauro Carvalho Chehab" ); |
929 | MODULE_DESCRIPTION(DRIVER_DESC " - input interface" ); |
930 | MODULE_VERSION(EM28XX_VERSION); |
931 | |
932 | module_init(em28xx_rc_register); |
933 | module_exit(em28xx_rc_unregister); |
934 | |