2 handle em28xx IR remotes via linux kernel input layer.
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>
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.
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.
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
26 #include <linux/module.h>
27 #include <linux/init.h>
28 #include <linux/delay.h>
29 #include <linux/interrupt.h>
30 #include <linux/usb.h>
31 #include <linux/slab.h>
32 #include <linux/bitrev.h>
34 #define EM28XX_SNAPSHOT_KEY KEY_CAMERA
35 #define EM28XX_BUTTONS_DEBOUNCED_QUERY_INTERVAL 500 /* [ms] */
36 #define EM28XX_BUTTONS_VOLATILE_QUERY_INTERVAL 100 /* [ms] */
38 static unsigned int ir_debug;
39 module_param(ir_debug, int, 0644);
40 MODULE_PARM_DESC(ir_debug, "enable debug messages [IR]");
42 #define MODULE_NAME "em28xx"
44 #define dprintk( fmt, arg...) do { \
46 dev_printk(KERN_DEBUG, &ir->dev->intf->dev, \
47 "input: %s: " fmt, __func__, ## arg); \
50 /**********************************************************
51 Polling structure used by em28xx IR's
52 **********************************************************/
54 struct em28xx_ir_poll_result {
55 unsigned int toggle_bit:1;
56 unsigned int read_count:7;
58 enum rc_type protocol;
70 struct delayed_work work;
71 unsigned int full_code:1;
72 unsigned int last_readcount;
75 struct i2c_client *i2c_client;
77 int (*get_key_i2c)(struct i2c_client *ir, enum rc_type *protocol, u32 *scancode);
78 int (*get_key)(struct em28xx_IR *, struct em28xx_ir_poll_result *);
81 /**********************************************************
82 I2C IR based get keycodes - should be used with ir-kbd-i2c
83 **********************************************************/
85 static int em28xx_get_key_terratec(struct i2c_client *i2c_dev,
86 enum rc_type *protocol, u32 *scancode)
91 if (1 != i2c_master_recv(i2c_dev, &b, 1))
94 /* it seems that 0xFE indicates that a button is still hold
95 down, while 0xff indicates that no button is hold down. */
104 *protocol = RC_TYPE_UNKNOWN;
109 static int em28xx_get_key_em_haup(struct i2c_client *i2c_dev,
110 enum rc_type *protocol, u32 *scancode)
112 unsigned char buf[2];
116 size = i2c_master_recv(i2c_dev, buf, sizeof(buf));
121 /* Does eliminate repeated parity code */
126 * Rearranges bits to the right order.
127 * The bit order were determined experimentally by using
128 * The original Hauppauge Grey IR and another RC5 that uses addr=0x08
129 * The RC5 code has 14 bits, but we've experimentally determined
130 * the meaning for only 11 bits.
131 * So, the code translation is not complete. Yet, it is enough to
132 * work with the provided RC5 IR.
134 *protocol = RC_TYPE_RC5;
135 *scancode = (bitrev8(buf[1]) & 0x1f) << 8 | bitrev8(buf[0]) >> 2;
139 static int em28xx_get_key_pinnacle_usb_grey(struct i2c_client *i2c_dev,
140 enum rc_type *protocol, u32 *scancode)
142 unsigned char buf[3];
146 if (3 != i2c_master_recv(i2c_dev, buf, 3))
152 *protocol = RC_TYPE_UNKNOWN;
153 *scancode = buf[2] & 0x3f;
157 static int em28xx_get_key_winfast_usbii_deluxe(struct i2c_client *i2c_dev,
158 enum rc_type *protocol, u32 *scancode)
160 unsigned char subaddr, keydetect, key;
162 struct i2c_msg msg[] = { { .addr = i2c_dev->addr, .flags = 0, .buf = &subaddr, .len = 1},
163 { .addr = i2c_dev->addr, .flags = I2C_M_RD, .buf = &keydetect, .len = 1} };
166 if (2 != i2c_transfer(i2c_dev->adapter, msg, 2))
168 if (keydetect == 0x00)
173 if (2 != i2c_transfer(i2c_dev->adapter, msg, 2))
178 *protocol = RC_TYPE_UNKNOWN;
183 /**********************************************************
184 Poll based get keycode functions
185 **********************************************************/
187 /* This is for the em2860/em2880 */
188 static int default_polling_getkey(struct em28xx_IR *ir,
189 struct em28xx_ir_poll_result *poll_result)
191 struct em28xx *dev = ir->dev;
193 u8 msg[3] = { 0, 0, 0 };
195 /* Read key toggle, brand, and key code
196 on registers 0x45, 0x46 and 0x47
198 rc = dev->em28xx_read_reg_req_len(dev, 0, EM28XX_R45_IR,
203 /* Infrared toggle (Reg 0x45[7]) */
204 poll_result->toggle_bit = (msg[0] >> 7);
206 /* Infrared read count (Reg 0x45[6:0] */
207 poll_result->read_count = (msg[0] & 0x7f);
209 /* Remote Control Address/Data (Regs 0x46/0x47) */
210 switch (ir->rc_type) {
212 poll_result->protocol = RC_TYPE_RC5;
213 poll_result->scancode = RC_SCANCODE_RC5(msg[1], msg[2]);
217 poll_result->protocol = RC_TYPE_NEC;
218 poll_result->scancode = RC_SCANCODE_NEC(msg[1], msg[2]);
222 poll_result->protocol = RC_TYPE_UNKNOWN;
223 poll_result->scancode = msg[1] << 8 | msg[2];
230 static int em2874_polling_getkey(struct em28xx_IR *ir,
231 struct em28xx_ir_poll_result *poll_result)
233 struct em28xx *dev = ir->dev;
235 u8 msg[5] = { 0, 0, 0, 0, 0 };
237 /* Read key toggle, brand, and key code
240 rc = dev->em28xx_read_reg_req_len(dev, 0, EM2874_R51_IR,
245 /* Infrared toggle (Reg 0x51[7]) */
246 poll_result->toggle_bit = (msg[0] >> 7);
248 /* Infrared read count (Reg 0x51[6:0] */
249 poll_result->read_count = (msg[0] & 0x7f);
252 * Remote Control Address (Reg 0x52)
253 * Remote Control Data (Reg 0x53-0x55)
255 switch (ir->rc_type) {
257 poll_result->protocol = RC_TYPE_RC5;
258 poll_result->scancode = RC_SCANCODE_RC5(msg[1], msg[2]);
262 poll_result->scancode = msg[1] << 8 | msg[2];
263 if ((msg[3] ^ msg[4]) != 0xff) { /* 32 bits NEC */
264 poll_result->protocol = RC_TYPE_NEC32;
265 poll_result->scancode = RC_SCANCODE_NEC32((msg[1] << 24) |
269 } else if ((msg[1] ^ msg[2]) != 0xff) { /* 24 bits NEC */
270 poll_result->protocol = RC_TYPE_NECX;
271 poll_result->scancode = RC_SCANCODE_NECX(msg[1] << 8 |
273 } else { /* Normal NEC */
274 poll_result->protocol = RC_TYPE_NEC;
275 poll_result->scancode = RC_SCANCODE_NEC(msg[1], msg[3]);
280 poll_result->protocol = RC_TYPE_RC6_0;
281 poll_result->scancode = RC_SCANCODE_RC6_0(msg[1], msg[2]);
285 poll_result->protocol = RC_TYPE_UNKNOWN;
286 poll_result->scancode = (msg[1] << 24) | (msg[2] << 16) |
287 (msg[3] << 8) | msg[4];
294 /**********************************************************
295 Polling code for em28xx
296 **********************************************************/
298 static int em28xx_i2c_ir_handle_key(struct em28xx_IR *ir)
301 enum rc_type protocol;
304 rc = ir->get_key_i2c(ir->i2c_client, &protocol, &scancode);
306 dprintk("ir->get_key_i2c() failed: %d\n", rc);
311 dprintk("%s: proto = 0x%04x, scancode = 0x%04x\n",
312 __func__, protocol, scancode);
313 rc_keydown(ir->rc, protocol, scancode, 0);
318 static void em28xx_ir_handle_key(struct em28xx_IR *ir)
321 struct em28xx_ir_poll_result poll_result;
323 /* read the registers containing the IR status */
324 result = ir->get_key(ir, &poll_result);
325 if (unlikely(result < 0)) {
326 dprintk("ir->get_key() failed: %d\n", result);
330 if (unlikely(poll_result.read_count != ir->last_readcount)) {
331 dprintk("%s: toggle: %d, count: %d, key 0x%04x\n", __func__,
332 poll_result.toggle_bit, poll_result.read_count,
333 poll_result.scancode);
336 poll_result.protocol,
337 poll_result.scancode,
338 poll_result.toggle_bit);
342 poll_result.scancode & 0xff,
343 poll_result.toggle_bit);
345 if (ir->dev->chip_id == CHIP_ID_EM2874 ||
346 ir->dev->chip_id == CHIP_ID_EM2884)
347 /* The em2874 clears the readcount field every time the
348 register is read. The em2860/2880 datasheet says that it
349 is supposed to clear the readcount, but it doesn't. So with
350 the em2874, we are looking for a non-zero read count as
351 opposed to a readcount that is incrementing */
352 ir->last_readcount = 0;
354 ir->last_readcount = poll_result.read_count;
358 static void em28xx_ir_work(struct work_struct *work)
360 struct em28xx_IR *ir = container_of(work, struct em28xx_IR, work.work);
362 if (ir->i2c_client) /* external i2c device */
363 em28xx_i2c_ir_handle_key(ir);
364 else /* internal device */
365 em28xx_ir_handle_key(ir);
366 schedule_delayed_work(&ir->work, msecs_to_jiffies(ir->polling));
369 static int em28xx_ir_start(struct rc_dev *rc)
371 struct em28xx_IR *ir = rc->priv;
373 INIT_DELAYED_WORK(&ir->work, em28xx_ir_work);
374 schedule_delayed_work(&ir->work, 0);
379 static void em28xx_ir_stop(struct rc_dev *rc)
381 struct em28xx_IR *ir = rc->priv;
383 cancel_delayed_work_sync(&ir->work);
386 static int em2860_ir_change_protocol(struct rc_dev *rc_dev, u64 *rc_type)
388 struct em28xx_IR *ir = rc_dev->priv;
389 struct em28xx *dev = ir->dev;
391 /* Adjust xclk based on IR table for RC5/NEC tables */
392 if (*rc_type & RC_BIT_RC5) {
393 dev->board.xclk |= EM28XX_XCLK_IR_RC5_MODE;
395 *rc_type = RC_BIT_RC5;
396 } else if (*rc_type & RC_BIT_NEC) {
397 dev->board.xclk &= ~EM28XX_XCLK_IR_RC5_MODE;
399 *rc_type = RC_BIT_NEC;
400 } else if (*rc_type & RC_BIT_UNKNOWN) {
401 *rc_type = RC_BIT_UNKNOWN;
403 *rc_type = ir->rc_type;
406 em28xx_write_reg_bits(dev, EM28XX_R0F_XCLK, dev->board.xclk,
407 EM28XX_XCLK_IR_RC5_MODE);
409 ir->rc_type = *rc_type;
414 static int em2874_ir_change_protocol(struct rc_dev *rc_dev, u64 *rc_type)
416 struct em28xx_IR *ir = rc_dev->priv;
417 struct em28xx *dev = ir->dev;
418 u8 ir_config = EM2874_IR_RC5;
420 /* Adjust xclk and set type based on IR table for RC5/NEC/RC6 tables */
421 if (*rc_type & RC_BIT_RC5) {
422 dev->board.xclk |= EM28XX_XCLK_IR_RC5_MODE;
424 *rc_type = RC_BIT_RC5;
425 } else if (*rc_type & RC_BIT_NEC) {
426 dev->board.xclk &= ~EM28XX_XCLK_IR_RC5_MODE;
427 ir_config = EM2874_IR_NEC | EM2874_IR_NEC_NO_PARITY;
429 *rc_type = RC_BIT_NEC;
430 } else if (*rc_type & RC_BIT_RC6_0) {
431 dev->board.xclk |= EM28XX_XCLK_IR_RC5_MODE;
432 ir_config = EM2874_IR_RC6_MODE_0;
434 *rc_type = RC_BIT_RC6_0;
435 } else if (*rc_type & RC_BIT_UNKNOWN) {
436 *rc_type = RC_BIT_UNKNOWN;
438 *rc_type = ir->rc_type;
441 em28xx_write_regs(dev, EM2874_R50_IR_CONFIG, &ir_config, 1);
442 em28xx_write_reg_bits(dev, EM28XX_R0F_XCLK, dev->board.xclk,
443 EM28XX_XCLK_IR_RC5_MODE);
445 ir->rc_type = *rc_type;
449 static int em28xx_ir_change_protocol(struct rc_dev *rc_dev, u64 *rc_type)
451 struct em28xx_IR *ir = rc_dev->priv;
452 struct em28xx *dev = ir->dev;
454 /* Setup the proper handler based on the chip */
455 switch (dev->chip_id) {
458 return em2860_ir_change_protocol(rc_dev, rc_type);
461 case CHIP_ID_EM28174:
462 case CHIP_ID_EM28178:
463 return em2874_ir_change_protocol(rc_dev, rc_type);
465 dev_err(&ir->dev->intf->dev,
466 "Unrecognized em28xx chip id 0x%02x: IR not supported\n",
472 static int em28xx_probe_i2c_ir(struct em28xx *dev)
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 const unsigned short addr_list[] = {
479 0x1f, 0x30, 0x47, I2C_CLIENT_END
482 while (addr_list[i] != I2C_CLIENT_END) {
483 if (i2c_probe_func_quick_read(&dev->i2c_adap[dev->def_i2c_bus], addr_list[i]) == 1)
491 /**********************************************************
493 **********************************************************/
495 static void em28xx_query_buttons(struct work_struct *work)
498 container_of(work, struct em28xx, buttons_query_work.work);
501 bool is_pressed, was_pressed;
502 const struct em28xx_led *led;
504 /* Poll and evaluate all addresses */
505 for (i = 0; i < dev->num_button_polling_addresses; i++) {
506 /* Read value from register */
507 regval = em28xx_read_reg(dev, dev->button_polling_addresses[i]);
510 /* Check states of the buttons and act */
512 while (dev->board.buttons[j].role >= 0 &&
513 dev->board.buttons[j].role < EM28XX_NUM_BUTTON_ROLES) {
514 struct em28xx_button *button = &dev->board.buttons[j];
515 /* Check if button uses the current address */
516 if (button->reg_r != dev->button_polling_addresses[i]) {
520 /* Determine if button is and was pressed last time */
521 is_pressed = regval & button->mask;
522 was_pressed = dev->button_polling_last_values[i]
524 if (button->inverted) {
525 is_pressed = !is_pressed;
526 was_pressed = !was_pressed;
528 /* Clear button state (if needed) */
529 if (is_pressed && button->reg_clearing)
530 em28xx_write_reg(dev, button->reg_clearing,
531 (~regval & button->mask)
532 | (regval & ~button->mask));
533 /* Handle button state */
534 if (!is_pressed || was_pressed) {
538 switch (button->role) {
539 case EM28XX_BUTTON_SNAPSHOT:
540 /* Emulate the keypress */
541 input_report_key(dev->sbutton_input_dev,
542 EM28XX_SNAPSHOT_KEY, 1);
543 /* Unpress the key */
544 input_report_key(dev->sbutton_input_dev,
545 EM28XX_SNAPSHOT_KEY, 0);
547 case EM28XX_BUTTON_ILLUMINATION:
548 led = em28xx_find_led(dev,
549 EM28XX_LED_ILLUMINATION);
550 /* Switch illumination LED on/off */
552 em28xx_toggle_reg_bits(dev,
557 WARN_ONCE(1, "BUG: unhandled button role.");
562 /* Save current value for comparison during the next polling */
563 dev->button_polling_last_values[i] = regval;
565 /* Schedule next poll */
566 schedule_delayed_work(&dev->buttons_query_work,
567 msecs_to_jiffies(dev->button_polling_interval));
570 static int em28xx_register_snapshot_button(struct em28xx *dev)
572 struct usb_device *udev = interface_to_usbdev(dev->intf);
573 struct input_dev *input_dev;
576 dev_info(&dev->intf->dev, "Registering snapshot button...\n");
577 input_dev = input_allocate_device();
581 usb_make_path(udev, dev->snapshot_button_path,
582 sizeof(dev->snapshot_button_path));
583 strlcat(dev->snapshot_button_path, "/sbutton",
584 sizeof(dev->snapshot_button_path));
586 input_dev->name = "em28xx snapshot button";
587 input_dev->phys = dev->snapshot_button_path;
588 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP);
589 set_bit(EM28XX_SNAPSHOT_KEY, input_dev->keybit);
590 input_dev->keycodesize = 0;
591 input_dev->keycodemax = 0;
592 input_dev->id.bustype = BUS_USB;
593 input_dev->id.vendor = le16_to_cpu(udev->descriptor.idVendor);
594 input_dev->id.product = le16_to_cpu(udev->descriptor.idProduct);
595 input_dev->id.version = 1;
596 input_dev->dev.parent = &dev->intf->dev;
598 err = input_register_device(input_dev);
600 dev_err(&dev->intf->dev, "input_register_device failed\n");
601 input_free_device(input_dev);
605 dev->sbutton_input_dev = input_dev;
609 static void em28xx_init_buttons(struct em28xx *dev)
612 bool addr_new = false;
614 dev->button_polling_interval = EM28XX_BUTTONS_DEBOUNCED_QUERY_INTERVAL;
615 while (dev->board.buttons[i].role >= 0 &&
616 dev->board.buttons[i].role < EM28XX_NUM_BUTTON_ROLES) {
617 struct em28xx_button *button = &dev->board.buttons[i];
618 /* Check if polling address is already on the list */
620 for (j = 0; j < dev->num_button_polling_addresses; j++) {
621 if (button->reg_r == dev->button_polling_addresses[j]) {
626 /* Check if max. number of polling addresses is exceeded */
627 if (addr_new && dev->num_button_polling_addresses
628 >= EM28XX_NUM_BUTTON_ADDRESSES_MAX) {
629 WARN_ONCE(1, "BUG: maximum number of button polling addresses exceeded.");
632 /* Button role specific checks and actions */
633 if (button->role == EM28XX_BUTTON_SNAPSHOT) {
634 /* Register input device */
635 if (em28xx_register_snapshot_button(dev) < 0)
637 } else if (button->role == EM28XX_BUTTON_ILLUMINATION) {
639 if (!em28xx_find_led(dev, EM28XX_LED_ILLUMINATION)) {
640 dev_err(&dev->intf->dev,
641 "BUG: illumination button defined, but no illumination LED.\n");
645 /* Add read address to list of polling addresses */
647 unsigned int index = dev->num_button_polling_addresses;
648 dev->button_polling_addresses[index] = button->reg_r;
649 dev->num_button_polling_addresses++;
651 /* Reduce polling interval if necessary */
652 if (!button->reg_clearing)
653 dev->button_polling_interval =
654 EM28XX_BUTTONS_VOLATILE_QUERY_INTERVAL;
661 if (dev->num_button_polling_addresses) {
662 memset(dev->button_polling_last_values, 0,
663 EM28XX_NUM_BUTTON_ADDRESSES_MAX);
664 schedule_delayed_work(&dev->buttons_query_work,
665 msecs_to_jiffies(dev->button_polling_interval));
669 static void em28xx_shutdown_buttons(struct em28xx *dev)
672 cancel_delayed_work_sync(&dev->buttons_query_work);
673 /* Clear polling addresses list */
674 dev->num_button_polling_addresses = 0;
675 /* Deregister input devices */
676 if (dev->sbutton_input_dev != NULL) {
677 dev_info(&dev->intf->dev, "Deregistering snapshot button\n");
678 input_unregister_device(dev->sbutton_input_dev);
679 dev->sbutton_input_dev = NULL;
683 static int em28xx_ir_init(struct em28xx *dev)
685 struct usb_device *udev = interface_to_usbdev(dev->intf);
686 struct em28xx_IR *ir;
690 u16 i2c_rc_dev_addr = 0;
692 if (dev->is_audio_only) {
693 /* Shouldn't initialize IR for this interface */
698 INIT_DELAYED_WORK(&dev->buttons_query_work, em28xx_query_buttons);
700 if (dev->board.buttons)
701 em28xx_init_buttons(dev);
703 if (dev->board.has_ir_i2c) {
704 i2c_rc_dev_addr = em28xx_probe_i2c_ir(dev);
705 if (!i2c_rc_dev_addr) {
706 dev->board.has_ir_i2c = 0;
707 dev_warn(&dev->intf->dev,
708 "No i2c IR remote control device found.\n");
713 if (dev->board.ir_codes == NULL && !dev->board.has_ir_i2c) {
714 /* No remote control support */
715 dev_warn(&dev->intf->dev,
716 "Remote control support is not available for this card.\n");
720 dev_info(&dev->intf->dev, "Registering input extension\n");
722 ir = kzalloc(sizeof(*ir), GFP_KERNEL);
725 rc = rc_allocate_device(RC_DRIVER_SCANCODE);
729 /* record handles to ourself */
735 rc->open = em28xx_ir_start;
736 rc->close = em28xx_ir_stop;
738 if (dev->board.has_ir_i2c) { /* external i2c device */
739 switch (dev->model) {
740 case EM2800_BOARD_TERRATEC_CINERGY_200:
741 case EM2820_BOARD_TERRATEC_CINERGY_250:
742 rc->map_name = RC_MAP_EM_TERRATEC;
743 ir->get_key_i2c = em28xx_get_key_terratec;
745 case EM2820_BOARD_PINNACLE_USB_2:
746 rc->map_name = RC_MAP_PINNACLE_GREY;
747 ir->get_key_i2c = em28xx_get_key_pinnacle_usb_grey;
749 case EM2820_BOARD_HAUPPAUGE_WINTV_USB_2:
750 rc->map_name = RC_MAP_HAUPPAUGE;
751 ir->get_key_i2c = em28xx_get_key_em_haup;
752 rc->allowed_protocols = RC_BIT_RC5;
754 case EM2820_BOARD_LEADTEK_WINFAST_USBII_DELUXE:
755 rc->map_name = RC_MAP_WINFAST_USBII_DELUXE;
756 ir->get_key_i2c = em28xx_get_key_winfast_usbii_deluxe;
763 ir->i2c_client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
766 ir->i2c_client->adapter = &ir->dev->i2c_adap[dev->def_i2c_bus];
767 ir->i2c_client->addr = i2c_rc_dev_addr;
768 ir->i2c_client->flags = 0;
769 /* NOTE: all other fields of i2c_client are unused */
770 } else { /* internal device */
771 switch (dev->chip_id) {
774 rc->allowed_protocols = RC_BIT_RC5 | RC_BIT_NEC;
775 ir->get_key = default_polling_getkey;
779 case CHIP_ID_EM28174:
780 case CHIP_ID_EM28178:
781 ir->get_key = em2874_polling_getkey;
782 rc->allowed_protocols = RC_BIT_RC5 | RC_BIT_NEC |
783 RC_BIT_NECX | RC_BIT_NEC32 | RC_BIT_RC6_0;
790 rc->change_protocol = em28xx_ir_change_protocol;
791 rc->map_name = dev->board.ir_codes;
793 /* By default, keep protocol field untouched */
794 rc_type = RC_BIT_UNKNOWN;
795 err = em28xx_ir_change_protocol(rc, &rc_type);
800 /* This is how often we ask the chip for IR information */
801 ir->polling = 100; /* ms */
803 /* init input device */
804 snprintf(ir->name, sizeof(ir->name), "%s IR",
805 dev_name(&dev->intf->dev));
807 usb_make_path(udev, ir->phys, sizeof(ir->phys));
808 strlcat(ir->phys, "/input0", sizeof(ir->phys));
810 rc->input_name = ir->name;
811 rc->input_phys = ir->phys;
812 rc->input_id.bustype = BUS_USB;
813 rc->input_id.version = 1;
814 rc->input_id.vendor = le16_to_cpu(udev->descriptor.idVendor);
815 rc->input_id.product = le16_to_cpu(udev->descriptor.idProduct);
816 rc->dev.parent = &dev->intf->dev;
817 rc->driver_name = MODULE_NAME;
820 err = rc_register_device(rc);
824 dev_info(&dev->intf->dev, "Input extension successfully initialized\n");
829 kfree(ir->i2c_client);
836 static int em28xx_ir_fini(struct em28xx *dev)
838 struct em28xx_IR *ir = dev->ir;
840 if (dev->is_audio_only) {
841 /* Shouldn't initialize IR for this interface */
845 dev_info(&dev->intf->dev, "Closing input extension\n");
847 em28xx_shutdown_buttons(dev);
849 /* skip detach on non attached boards */
853 rc_unregister_device(ir->rc);
855 kfree(ir->i2c_client);
862 kref_put(&dev->ref, em28xx_free_device);
867 static int em28xx_ir_suspend(struct em28xx *dev)
869 struct em28xx_IR *ir = dev->ir;
871 if (dev->is_audio_only)
874 dev_info(&dev->intf->dev, "Suspending input extension\n");
876 cancel_delayed_work_sync(&ir->work);
877 cancel_delayed_work_sync(&dev->buttons_query_work);
878 /* is canceling delayed work sufficient or does the rc event
879 kthread needs stopping? kthread is stopped in
880 ir_raw_event_unregister() */
884 static int em28xx_ir_resume(struct em28xx *dev)
886 struct em28xx_IR *ir = dev->ir;
888 if (dev->is_audio_only)
891 dev_info(&dev->intf->dev, "Resuming input extension\n");
892 /* if suspend calls ir_raw_event_unregister(), the should call
893 ir_raw_event_register() */
895 schedule_delayed_work(&ir->work, msecs_to_jiffies(ir->polling));
896 if (dev->num_button_polling_addresses)
897 schedule_delayed_work(&dev->buttons_query_work,
898 msecs_to_jiffies(dev->button_polling_interval));
902 static struct em28xx_ops rc_ops = {
904 .name = "Em28xx Input Extension",
905 .init = em28xx_ir_init,
906 .fini = em28xx_ir_fini,
907 .suspend = em28xx_ir_suspend,
908 .resume = em28xx_ir_resume,
911 static int __init em28xx_rc_register(void)
913 return em28xx_register_extension(&rc_ops);
916 static void __exit em28xx_rc_unregister(void)
918 em28xx_unregister_extension(&rc_ops);
921 MODULE_LICENSE("GPL");
922 MODULE_AUTHOR("Mauro Carvalho Chehab");
923 MODULE_DESCRIPTION(DRIVER_DESC " - input interface");
924 MODULE_VERSION(EM28XX_VERSION);
926 module_init(em28xx_rc_register);
927 module_exit(em28xx_rc_unregister);