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_SBUTTON_QUERY_INTERVAL 500 35 #define EM28XX_R0C_USBSUSP_SNAPSHOT 0x20 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 return em2874_ir_change_protocol(rc_dev, rc_type); 447 default: 448 printk("Unrecognized em28xx chip id 0x%02x: IR not supported\n", 449 dev->chip_id); 450 return -EINVAL; 451 } 452 } 453 454 static int em28xx_probe_i2c_ir(struct em28xx *dev) 455 { 456 int i = 0; 457 /* Leadtek winfast tv USBII deluxe can find a non working IR-device */ 458 /* at address 0x18, so if that address is needed for another board in */ 459 /* the future, please put it after 0x1f. */ 460 const unsigned short addr_list[] = { 461 0x1f, 0x30, 0x47, I2C_CLIENT_END 462 }; 463 464 while (addr_list[i] != I2C_CLIENT_END) { 465 if (i2c_probe_func_quick_read(&dev->i2c_adap[dev->def_i2c_bus], addr_list[i]) == 1) 466 return addr_list[i]; 467 i++; 468 } 469 470 return -ENODEV; 471 } 472 473 /********************************************************** 474 Handle Webcam snapshot button 475 **********************************************************/ 476 477 static void em28xx_query_sbutton(struct work_struct *work) 478 { 479 /* Poll the register and see if the button is depressed */ 480 struct em28xx *dev = 481 container_of(work, struct em28xx, sbutton_query_work.work); 482 int ret; 483 484 ret = em28xx_read_reg(dev, EM28XX_R0C_USBSUSP); 485 486 if (ret & EM28XX_R0C_USBSUSP_SNAPSHOT) { 487 u8 cleared; 488 /* Button is depressed, clear the register */ 489 cleared = ((u8) ret) & ~EM28XX_R0C_USBSUSP_SNAPSHOT; 490 em28xx_write_regs(dev, EM28XX_R0C_USBSUSP, &cleared, 1); 491 492 /* Not emulate the keypress */ 493 input_report_key(dev->sbutton_input_dev, EM28XX_SNAPSHOT_KEY, 494 1); 495 /* Now unpress the key */ 496 input_report_key(dev->sbutton_input_dev, EM28XX_SNAPSHOT_KEY, 497 0); 498 } 499 500 /* Schedule next poll */ 501 schedule_delayed_work(&dev->sbutton_query_work, 502 msecs_to_jiffies(EM28XX_SBUTTON_QUERY_INTERVAL)); 503 } 504 505 static void em28xx_register_snapshot_button(struct em28xx *dev) 506 { 507 struct input_dev *input_dev; 508 int err; 509 510 em28xx_info("Registering snapshot button...\n"); 511 input_dev = input_allocate_device(); 512 if (!input_dev) { 513 em28xx_errdev("input_allocate_device failed\n"); 514 return; 515 } 516 517 usb_make_path(dev->udev, dev->snapshot_button_path, 518 sizeof(dev->snapshot_button_path)); 519 strlcat(dev->snapshot_button_path, "/sbutton", 520 sizeof(dev->snapshot_button_path)); 521 INIT_DELAYED_WORK(&dev->sbutton_query_work, em28xx_query_sbutton); 522 523 input_dev->name = "em28xx snapshot button"; 524 input_dev->phys = dev->snapshot_button_path; 525 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP); 526 set_bit(EM28XX_SNAPSHOT_KEY, input_dev->keybit); 527 input_dev->keycodesize = 0; 528 input_dev->keycodemax = 0; 529 input_dev->id.bustype = BUS_USB; 530 input_dev->id.vendor = le16_to_cpu(dev->udev->descriptor.idVendor); 531 input_dev->id.product = le16_to_cpu(dev->udev->descriptor.idProduct); 532 input_dev->id.version = 1; 533 input_dev->dev.parent = &dev->udev->dev; 534 535 err = input_register_device(input_dev); 536 if (err) { 537 em28xx_errdev("input_register_device failed\n"); 538 input_free_device(input_dev); 539 return; 540 } 541 542 dev->sbutton_input_dev = input_dev; 543 schedule_delayed_work(&dev->sbutton_query_work, 544 msecs_to_jiffies(EM28XX_SBUTTON_QUERY_INTERVAL)); 545 return; 546 547 } 548 549 static void em28xx_deregister_snapshot_button(struct em28xx *dev) 550 { 551 if (dev->sbutton_input_dev != NULL) { 552 em28xx_info("Deregistering snapshot button\n"); 553 cancel_delayed_work_sync(&dev->sbutton_query_work); 554 input_unregister_device(dev->sbutton_input_dev); 555 dev->sbutton_input_dev = NULL; 556 } 557 return; 558 } 559 560 static int em28xx_ir_init(struct em28xx *dev) 561 { 562 struct em28xx_IR *ir; 563 struct rc_dev *rc; 564 int err = -ENOMEM; 565 u64 rc_type; 566 u16 i2c_rc_dev_addr = 0; 567 568 if (dev->board.has_snapshot_button) 569 em28xx_register_snapshot_button(dev); 570 571 if (dev->board.has_ir_i2c) { 572 i2c_rc_dev_addr = em28xx_probe_i2c_ir(dev); 573 if (!i2c_rc_dev_addr) { 574 dev->board.has_ir_i2c = 0; 575 em28xx_warn("No i2c IR remote control device found.\n"); 576 return -ENODEV; 577 } 578 } 579 580 if (dev->board.ir_codes == NULL && !dev->board.has_ir_i2c) { 581 /* No remote control support */ 582 em28xx_warn("Remote control support is not available for " 583 "this card.\n"); 584 return 0; 585 } 586 587 ir = kzalloc(sizeof(*ir), GFP_KERNEL); 588 rc = rc_allocate_device(); 589 if (!ir || !rc) 590 goto error; 591 592 /* record handles to ourself */ 593 ir->dev = dev; 594 dev->ir = ir; 595 ir->rc = rc; 596 597 rc->priv = ir; 598 rc->open = em28xx_ir_start; 599 rc->close = em28xx_ir_stop; 600 601 if (dev->board.has_ir_i2c) { /* external i2c device */ 602 switch (dev->model) { 603 case EM2800_BOARD_TERRATEC_CINERGY_200: 604 case EM2820_BOARD_TERRATEC_CINERGY_250: 605 rc->map_name = RC_MAP_EM_TERRATEC; 606 ir->get_key_i2c = em28xx_get_key_terratec; 607 break; 608 case EM2820_BOARD_PINNACLE_USB_2: 609 rc->map_name = RC_MAP_PINNACLE_GREY; 610 ir->get_key_i2c = em28xx_get_key_pinnacle_usb_grey; 611 break; 612 case EM2820_BOARD_HAUPPAUGE_WINTV_USB_2: 613 rc->map_name = RC_MAP_HAUPPAUGE; 614 ir->get_key_i2c = em28xx_get_key_em_haup; 615 rc->allowed_protos = RC_BIT_RC5; 616 break; 617 case EM2820_BOARD_LEADTEK_WINFAST_USBII_DELUXE: 618 rc->map_name = RC_MAP_WINFAST_USBII_DELUXE; 619 ir->get_key_i2c = em28xx_get_key_winfast_usbii_deluxe; 620 break; 621 default: 622 err = -ENODEV; 623 goto error; 624 } 625 626 ir->i2c_dev_addr = i2c_rc_dev_addr; 627 } else { /* internal device */ 628 switch (dev->chip_id) { 629 case CHIP_ID_EM2860: 630 case CHIP_ID_EM2883: 631 rc->allowed_protos = RC_BIT_RC5 | RC_BIT_NEC; 632 ir->get_key = default_polling_getkey; 633 break; 634 case CHIP_ID_EM2884: 635 case CHIP_ID_EM2874: 636 case CHIP_ID_EM28174: 637 ir->get_key = em2874_polling_getkey; 638 rc->allowed_protos = RC_BIT_RC5 | RC_BIT_NEC | 639 RC_BIT_RC6_0; 640 break; 641 default: 642 err = -ENODEV; 643 goto error; 644 } 645 646 rc->change_protocol = em28xx_ir_change_protocol; 647 rc->map_name = dev->board.ir_codes; 648 649 /* By default, keep protocol field untouched */ 650 rc_type = RC_BIT_UNKNOWN; 651 err = em28xx_ir_change_protocol(rc, &rc_type); 652 if (err) 653 goto error; 654 } 655 656 /* This is how often we ask the chip for IR information */ 657 ir->polling = 100; /* ms */ 658 659 /* init input device */ 660 snprintf(ir->name, sizeof(ir->name), "em28xx IR (%s)", dev->name); 661 662 usb_make_path(dev->udev, ir->phys, sizeof(ir->phys)); 663 strlcat(ir->phys, "/input0", sizeof(ir->phys)); 664 665 rc->input_name = ir->name; 666 rc->input_phys = ir->phys; 667 rc->input_id.bustype = BUS_USB; 668 rc->input_id.version = 1; 669 rc->input_id.vendor = le16_to_cpu(dev->udev->descriptor.idVendor); 670 rc->input_id.product = le16_to_cpu(dev->udev->descriptor.idProduct); 671 rc->dev.parent = &dev->udev->dev; 672 rc->driver_name = MODULE_NAME; 673 674 /* all done */ 675 err = rc_register_device(rc); 676 if (err) 677 goto error; 678 679 return 0; 680 681 error: 682 dev->ir = NULL; 683 rc_free_device(rc); 684 kfree(ir); 685 return err; 686 } 687 688 static int em28xx_ir_fini(struct em28xx *dev) 689 { 690 struct em28xx_IR *ir = dev->ir; 691 692 em28xx_deregister_snapshot_button(dev); 693 694 /* skip detach on non attached boards */ 695 if (!ir) 696 return 0; 697 698 if (ir->rc) 699 rc_unregister_device(ir->rc); 700 701 /* done */ 702 kfree(ir); 703 dev->ir = NULL; 704 return 0; 705 } 706 707 static struct em28xx_ops rc_ops = { 708 .id = EM28XX_RC, 709 .name = "Em28xx Input Extension", 710 .init = em28xx_ir_init, 711 .fini = em28xx_ir_fini, 712 }; 713 714 static int __init em28xx_rc_register(void) 715 { 716 return em28xx_register_extension(&rc_ops); 717 } 718 719 static void __exit em28xx_rc_unregister(void) 720 { 721 em28xx_unregister_extension(&rc_ops); 722 } 723 724 MODULE_LICENSE("GPL"); 725 MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@redhat.com>"); 726 MODULE_DESCRIPTION("Em28xx Input driver"); 727 728 module_init(em28xx_rc_register); 729 module_exit(em28xx_rc_unregister); 730