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 36 static unsigned int ir_debug; 37 module_param(ir_debug, int, 0644); 38 MODULE_PARM_DESC(ir_debug, "enable debug messages [IR]"); 39 40 #define MODULE_NAME "em28xx" 41 42 #define dprintk(fmt, arg...) \ 43 if (ir_debug) { \ 44 printk(KERN_DEBUG "%s/ir: " fmt, ir->name , ## arg); \ 45 } 46 47 /********************************************************** 48 Polling structure used by em28xx IR's 49 **********************************************************/ 50 51 struct em28xx_ir_poll_result { 52 unsigned int toggle_bit:1; 53 unsigned int read_count:7; 54 55 u32 scancode; 56 }; 57 58 struct em28xx_IR { 59 struct em28xx *dev; 60 struct rc_dev *rc; 61 char name[32]; 62 char phys[32]; 63 64 /* poll decoder */ 65 int polling; 66 struct delayed_work work; 67 unsigned int full_code:1; 68 unsigned int last_readcount; 69 u64 rc_type; 70 71 /* i2c slave address of external device (if used) */ 72 u16 i2c_dev_addr; 73 74 int (*get_key_i2c)(struct i2c_client *, u32 *); 75 int (*get_key)(struct em28xx_IR *, struct em28xx_ir_poll_result *); 76 }; 77 78 /********************************************************** 79 I2C IR based get keycodes - should be used with ir-kbd-i2c 80 **********************************************************/ 81 82 static int em28xx_get_key_terratec(struct i2c_client *i2c_dev, u32 *ir_key) 83 { 84 unsigned char b; 85 86 /* poll IR chip */ 87 if (1 != i2c_master_recv(i2c_dev, &b, 1)) 88 return -EIO; 89 90 /* it seems that 0xFE indicates that a button is still hold 91 down, while 0xff indicates that no button is hold down. */ 92 93 if (b == 0xff) 94 return 0; 95 96 if (b == 0xfe) 97 /* keep old data */ 98 return 1; 99 100 *ir_key = b; 101 return 1; 102 } 103 104 static int em28xx_get_key_em_haup(struct i2c_client *i2c_dev, u32 *ir_key) 105 { 106 unsigned char buf[2]; 107 u16 code; 108 int size; 109 110 /* poll IR chip */ 111 size = i2c_master_recv(i2c_dev, buf, sizeof(buf)); 112 113 if (size != 2) 114 return -EIO; 115 116 /* Does eliminate repeated parity code */ 117 if (buf[1] == 0xff) 118 return 0; 119 120 /* 121 * Rearranges bits to the right order. 122 * The bit order were determined experimentally by using 123 * The original Hauppauge Grey IR and another RC5 that uses addr=0x08 124 * The RC5 code has 14 bits, but we've experimentally determined 125 * the meaning for only 11 bits. 126 * So, the code translation is not complete. Yet, it is enough to 127 * work with the provided RC5 IR. 128 */ 129 code = 130 ((buf[0] & 0x01) ? 0x0020 : 0) | /* 0010 0000 */ 131 ((buf[0] & 0x02) ? 0x0010 : 0) | /* 0001 0000 */ 132 ((buf[0] & 0x04) ? 0x0008 : 0) | /* 0000 1000 */ 133 ((buf[0] & 0x08) ? 0x0004 : 0) | /* 0000 0100 */ 134 ((buf[0] & 0x10) ? 0x0002 : 0) | /* 0000 0010 */ 135 ((buf[0] & 0x20) ? 0x0001 : 0) | /* 0000 0001 */ 136 ((buf[1] & 0x08) ? 0x1000 : 0) | /* 0001 0000 */ 137 ((buf[1] & 0x10) ? 0x0800 : 0) | /* 0000 1000 */ 138 ((buf[1] & 0x20) ? 0x0400 : 0) | /* 0000 0100 */ 139 ((buf[1] & 0x40) ? 0x0200 : 0) | /* 0000 0010 */ 140 ((buf[1] & 0x80) ? 0x0100 : 0); /* 0000 0001 */ 141 142 /* return key */ 143 *ir_key = code; 144 return 1; 145 } 146 147 static int em28xx_get_key_pinnacle_usb_grey(struct i2c_client *i2c_dev, 148 u32 *ir_key) 149 { 150 unsigned char buf[3]; 151 152 /* poll IR chip */ 153 154 if (3 != i2c_master_recv(i2c_dev, buf, 3)) 155 return -EIO; 156 157 if (buf[0] != 0x00) 158 return 0; 159 160 *ir_key = buf[2]&0x3f; 161 162 return 1; 163 } 164 165 static int em28xx_get_key_winfast_usbii_deluxe(struct i2c_client *i2c_dev, 166 u32 *ir_key) 167 { 168 unsigned char subaddr, keydetect, key; 169 170 struct i2c_msg msg[] = { { .addr = i2c_dev->addr, .flags = 0, .buf = &subaddr, .len = 1}, 171 { .addr = i2c_dev->addr, .flags = I2C_M_RD, .buf = &keydetect, .len = 1} }; 172 173 subaddr = 0x10; 174 if (2 != i2c_transfer(i2c_dev->adapter, msg, 2)) 175 return -EIO; 176 if (keydetect == 0x00) 177 return 0; 178 179 subaddr = 0x00; 180 msg[1].buf = &key; 181 if (2 != i2c_transfer(i2c_dev->adapter, msg, 2)) 182 return -EIO; 183 if (key == 0x00) 184 return 0; 185 186 *ir_key = key; 187 return 1; 188 } 189 190 /********************************************************** 191 Poll based get keycode functions 192 **********************************************************/ 193 194 /* This is for the em2860/em2880 */ 195 static int default_polling_getkey(struct em28xx_IR *ir, 196 struct em28xx_ir_poll_result *poll_result) 197 { 198 struct em28xx *dev = ir->dev; 199 int rc; 200 u8 msg[3] = { 0, 0, 0 }; 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 poll_result->scancode = msg[1] << 8 | msg[2]; 218 219 return 0; 220 } 221 222 static int em2874_polling_getkey(struct em28xx_IR *ir, 223 struct em28xx_ir_poll_result *poll_result) 224 { 225 struct em28xx *dev = ir->dev; 226 int rc; 227 u8 msg[5] = { 0, 0, 0, 0, 0 }; 228 229 /* Read key toggle, brand, and key code 230 on registers 0x51-55 231 */ 232 rc = dev->em28xx_read_reg_req_len(dev, 0, EM2874_R51_IR, 233 msg, sizeof(msg)); 234 if (rc < 0) 235 return rc; 236 237 /* Infrared toggle (Reg 0x51[7]) */ 238 poll_result->toggle_bit = (msg[0] >> 7); 239 240 /* Infrared read count (Reg 0x51[6:0] */ 241 poll_result->read_count = (msg[0] & 0x7f); 242 243 /* 244 * Remote Control Address (Reg 0x52) 245 * Remote Control Data (Reg 0x53-0x55) 246 */ 247 switch (ir->rc_type) { 248 case RC_BIT_RC5: 249 poll_result->scancode = msg[1] << 8 | msg[2]; 250 break; 251 case RC_BIT_NEC: 252 if ((msg[3] ^ msg[4]) != 0xff) /* 32 bits NEC */ 253 poll_result->scancode = (msg[1] << 24) | 254 (msg[2] << 16) | 255 (msg[3] << 8) | 256 msg[4]; 257 else if ((msg[1] ^ msg[2]) != 0xff) /* 24 bits NEC */ 258 poll_result->scancode = (msg[1] << 16) | 259 (msg[2] << 8) | 260 msg[3]; 261 else /* Normal NEC */ 262 poll_result->scancode = msg[1] << 8 | msg[3]; 263 break; 264 case RC_BIT_RC6_0: 265 poll_result->scancode = msg[1] << 8 | msg[2]; 266 break; 267 default: 268 poll_result->scancode = (msg[1] << 24) | (msg[2] << 16) | 269 (msg[3] << 8) | msg[4]; 270 break; 271 } 272 273 return 0; 274 } 275 276 /********************************************************** 277 Polling code for em28xx 278 **********************************************************/ 279 280 static int em28xx_i2c_ir_handle_key(struct em28xx_IR *ir) 281 { 282 struct em28xx *dev = ir->dev; 283 static u32 ir_key; 284 int rc; 285 struct i2c_client client; 286 287 client.adapter = &ir->dev->i2c_adap[dev->def_i2c_bus]; 288 client.addr = ir->i2c_dev_addr; 289 290 rc = ir->get_key_i2c(&client, &ir_key); 291 if (rc < 0) { 292 dprintk("ir->get_key_i2c() failed: %d\n", rc); 293 return rc; 294 } 295 296 if (rc) { 297 dprintk("%s: keycode = 0x%04x\n", __func__, ir_key); 298 rc_keydown(ir->rc, ir_key, 0); 299 } 300 return 0; 301 } 302 303 static void em28xx_ir_handle_key(struct em28xx_IR *ir) 304 { 305 int result; 306 struct em28xx_ir_poll_result poll_result; 307 308 /* read the registers containing the IR status */ 309 result = ir->get_key(ir, &poll_result); 310 if (unlikely(result < 0)) { 311 dprintk("ir->get_key() failed: %d\n", result); 312 return; 313 } 314 315 if (unlikely(poll_result.read_count != ir->last_readcount)) { 316 dprintk("%s: toggle: %d, count: %d, key 0x%04x\n", __func__, 317 poll_result.toggle_bit, poll_result.read_count, 318 poll_result.scancode); 319 if (ir->full_code) 320 rc_keydown(ir->rc, 321 poll_result.scancode, 322 poll_result.toggle_bit); 323 else 324 rc_keydown(ir->rc, 325 poll_result.scancode & 0xff, 326 poll_result.toggle_bit); 327 328 if (ir->dev->chip_id == CHIP_ID_EM2874 || 329 ir->dev->chip_id == CHIP_ID_EM2884) 330 /* The em2874 clears the readcount field every time the 331 register is read. The em2860/2880 datasheet says that it 332 is supposed to clear the readcount, but it doesn't. So with 333 the em2874, we are looking for a non-zero read count as 334 opposed to a readcount that is incrementing */ 335 ir->last_readcount = 0; 336 else 337 ir->last_readcount = poll_result.read_count; 338 } 339 } 340 341 static void em28xx_ir_work(struct work_struct *work) 342 { 343 struct em28xx_IR *ir = container_of(work, struct em28xx_IR, work.work); 344 345 if (ir->i2c_dev_addr) /* external i2c device */ 346 em28xx_i2c_ir_handle_key(ir); 347 else /* internal device */ 348 em28xx_ir_handle_key(ir); 349 schedule_delayed_work(&ir->work, msecs_to_jiffies(ir->polling)); 350 } 351 352 static int em28xx_ir_start(struct rc_dev *rc) 353 { 354 struct em28xx_IR *ir = rc->priv; 355 356 INIT_DELAYED_WORK(&ir->work, em28xx_ir_work); 357 schedule_delayed_work(&ir->work, 0); 358 359 return 0; 360 } 361 362 static void em28xx_ir_stop(struct rc_dev *rc) 363 { 364 struct em28xx_IR *ir = rc->priv; 365 366 cancel_delayed_work_sync(&ir->work); 367 } 368 369 static int em2860_ir_change_protocol(struct rc_dev *rc_dev, u64 *rc_type) 370 { 371 struct em28xx_IR *ir = rc_dev->priv; 372 struct em28xx *dev = ir->dev; 373 374 /* Adjust xclk based on IR table for RC5/NEC tables */ 375 if (*rc_type & RC_BIT_RC5) { 376 dev->board.xclk |= EM28XX_XCLK_IR_RC5_MODE; 377 ir->full_code = 1; 378 *rc_type = RC_BIT_RC5; 379 } else if (*rc_type & RC_BIT_NEC) { 380 dev->board.xclk &= ~EM28XX_XCLK_IR_RC5_MODE; 381 ir->full_code = 1; 382 *rc_type = RC_BIT_NEC; 383 } else if (*rc_type & RC_BIT_UNKNOWN) { 384 *rc_type = RC_BIT_UNKNOWN; 385 } else { 386 *rc_type = ir->rc_type; 387 return -EINVAL; 388 } 389 em28xx_write_reg_bits(dev, EM28XX_R0F_XCLK, dev->board.xclk, 390 EM28XX_XCLK_IR_RC5_MODE); 391 392 ir->rc_type = *rc_type; 393 394 return 0; 395 } 396 397 static int em2874_ir_change_protocol(struct rc_dev *rc_dev, u64 *rc_type) 398 { 399 struct em28xx_IR *ir = rc_dev->priv; 400 struct em28xx *dev = ir->dev; 401 u8 ir_config = EM2874_IR_RC5; 402 403 /* Adjust xclk and set type based on IR table for RC5/NEC/RC6 tables */ 404 if (*rc_type & RC_BIT_RC5) { 405 dev->board.xclk |= EM28XX_XCLK_IR_RC5_MODE; 406 ir->full_code = 1; 407 *rc_type = RC_BIT_RC5; 408 } else if (*rc_type & RC_BIT_NEC) { 409 dev->board.xclk &= ~EM28XX_XCLK_IR_RC5_MODE; 410 ir_config = EM2874_IR_NEC | EM2874_IR_NEC_NO_PARITY; 411 ir->full_code = 1; 412 *rc_type = RC_BIT_NEC; 413 } else if (*rc_type & RC_BIT_RC6_0) { 414 dev->board.xclk |= EM28XX_XCLK_IR_RC5_MODE; 415 ir_config = EM2874_IR_RC6_MODE_0; 416 ir->full_code = 1; 417 *rc_type = RC_BIT_RC6_0; 418 } else if (*rc_type & RC_BIT_UNKNOWN) { 419 *rc_type = RC_BIT_UNKNOWN; 420 } else { 421 *rc_type = ir->rc_type; 422 return -EINVAL; 423 } 424 em28xx_write_regs(dev, EM2874_R50_IR_CONFIG, &ir_config, 1); 425 em28xx_write_reg_bits(dev, EM28XX_R0F_XCLK, dev->board.xclk, 426 EM28XX_XCLK_IR_RC5_MODE); 427 428 ir->rc_type = *rc_type; 429 430 return 0; 431 } 432 static int em28xx_ir_change_protocol(struct rc_dev *rc_dev, u64 *rc_type) 433 { 434 struct em28xx_IR *ir = rc_dev->priv; 435 struct em28xx *dev = ir->dev; 436 437 /* Setup the proper handler based on the chip */ 438 switch (dev->chip_id) { 439 case CHIP_ID_EM2860: 440 case CHIP_ID_EM2883: 441 return em2860_ir_change_protocol(rc_dev, rc_type); 442 case CHIP_ID_EM2884: 443 case CHIP_ID_EM2874: 444 case CHIP_ID_EM28174: 445 return em2874_ir_change_protocol(rc_dev, rc_type); 446 default: 447 printk("Unrecognized em28xx chip id 0x%02x: IR not supported\n", 448 dev->chip_id); 449 return -EINVAL; 450 } 451 } 452 453 static int em28xx_probe_i2c_ir(struct em28xx *dev) 454 { 455 int i = 0; 456 /* Leadtek winfast tv USBII deluxe can find a non working IR-device */ 457 /* at address 0x18, so if that address is needed for another board in */ 458 /* the future, please put it after 0x1f. */ 459 const unsigned short addr_list[] = { 460 0x1f, 0x30, 0x47, I2C_CLIENT_END 461 }; 462 463 while (addr_list[i] != I2C_CLIENT_END) { 464 if (i2c_probe_func_quick_read(&dev->i2c_adap[dev->def_i2c_bus], addr_list[i]) == 1) 465 return addr_list[i]; 466 i++; 467 } 468 469 return -ENODEV; 470 } 471 472 /********************************************************** 473 Handle Webcam snapshot button 474 **********************************************************/ 475 476 static void em28xx_query_sbutton(struct work_struct *work) 477 { 478 /* Poll the register and see if the button is depressed */ 479 struct em28xx *dev = 480 container_of(work, struct em28xx, sbutton_query_work.work); 481 int ret; 482 483 ret = em28xx_read_reg(dev, EM28XX_R0C_USBSUSP); 484 485 if (ret & EM28XX_R0C_USBSUSP_SNAPSHOT) { 486 u8 cleared; 487 /* Button is depressed, clear the register */ 488 cleared = ((u8) ret) & ~EM28XX_R0C_USBSUSP_SNAPSHOT; 489 em28xx_write_regs(dev, EM28XX_R0C_USBSUSP, &cleared, 1); 490 491 /* Not emulate the keypress */ 492 input_report_key(dev->sbutton_input_dev, EM28XX_SNAPSHOT_KEY, 493 1); 494 /* Now unpress the key */ 495 input_report_key(dev->sbutton_input_dev, EM28XX_SNAPSHOT_KEY, 496 0); 497 } 498 499 /* Schedule next poll */ 500 schedule_delayed_work(&dev->sbutton_query_work, 501 msecs_to_jiffies(EM28XX_SBUTTON_QUERY_INTERVAL)); 502 } 503 504 static void em28xx_register_snapshot_button(struct em28xx *dev) 505 { 506 struct input_dev *input_dev; 507 int err; 508 509 em28xx_info("Registering snapshot button...\n"); 510 input_dev = input_allocate_device(); 511 if (!input_dev) { 512 em28xx_errdev("input_allocate_device failed\n"); 513 return; 514 } 515 516 usb_make_path(dev->udev, dev->snapshot_button_path, 517 sizeof(dev->snapshot_button_path)); 518 strlcat(dev->snapshot_button_path, "/sbutton", 519 sizeof(dev->snapshot_button_path)); 520 INIT_DELAYED_WORK(&dev->sbutton_query_work, em28xx_query_sbutton); 521 522 input_dev->name = "em28xx snapshot button"; 523 input_dev->phys = dev->snapshot_button_path; 524 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP); 525 set_bit(EM28XX_SNAPSHOT_KEY, input_dev->keybit); 526 input_dev->keycodesize = 0; 527 input_dev->keycodemax = 0; 528 input_dev->id.bustype = BUS_USB; 529 input_dev->id.vendor = le16_to_cpu(dev->udev->descriptor.idVendor); 530 input_dev->id.product = le16_to_cpu(dev->udev->descriptor.idProduct); 531 input_dev->id.version = 1; 532 input_dev->dev.parent = &dev->udev->dev; 533 534 err = input_register_device(input_dev); 535 if (err) { 536 em28xx_errdev("input_register_device failed\n"); 537 input_free_device(input_dev); 538 return; 539 } 540 541 dev->sbutton_input_dev = input_dev; 542 schedule_delayed_work(&dev->sbutton_query_work, 543 msecs_to_jiffies(EM28XX_SBUTTON_QUERY_INTERVAL)); 544 return; 545 546 } 547 548 static void em28xx_deregister_snapshot_button(struct em28xx *dev) 549 { 550 if (dev->sbutton_input_dev != NULL) { 551 em28xx_info("Deregistering snapshot button\n"); 552 cancel_delayed_work_sync(&dev->sbutton_query_work); 553 input_unregister_device(dev->sbutton_input_dev); 554 dev->sbutton_input_dev = NULL; 555 } 556 return; 557 } 558 559 static int em28xx_ir_init(struct em28xx *dev) 560 { 561 struct em28xx_IR *ir; 562 struct rc_dev *rc; 563 int err = -ENOMEM; 564 u64 rc_type; 565 u16 i2c_rc_dev_addr = 0; 566 567 if (dev->board.has_snapshot_button) 568 em28xx_register_snapshot_button(dev); 569 570 if (dev->board.has_ir_i2c) { 571 i2c_rc_dev_addr = em28xx_probe_i2c_ir(dev); 572 if (!i2c_rc_dev_addr) { 573 dev->board.has_ir_i2c = 0; 574 em28xx_warn("No i2c IR remote control device found.\n"); 575 return -ENODEV; 576 } 577 } 578 579 if (dev->board.ir_codes == NULL && !dev->board.has_ir_i2c) { 580 /* No remote control support */ 581 em28xx_warn("Remote control support is not available for " 582 "this card.\n"); 583 return 0; 584 } 585 586 ir = kzalloc(sizeof(*ir), GFP_KERNEL); 587 rc = rc_allocate_device(); 588 if (!ir || !rc) 589 goto error; 590 591 /* record handles to ourself */ 592 ir->dev = dev; 593 dev->ir = ir; 594 ir->rc = rc; 595 596 rc->priv = ir; 597 rc->open = em28xx_ir_start; 598 rc->close = em28xx_ir_stop; 599 600 if (dev->board.has_ir_i2c) { /* external i2c device */ 601 switch (dev->model) { 602 case EM2800_BOARD_TERRATEC_CINERGY_200: 603 case EM2820_BOARD_TERRATEC_CINERGY_250: 604 rc->map_name = RC_MAP_EM_TERRATEC; 605 ir->get_key_i2c = em28xx_get_key_terratec; 606 break; 607 case EM2820_BOARD_PINNACLE_USB_2: 608 rc->map_name = RC_MAP_PINNACLE_GREY; 609 ir->get_key_i2c = em28xx_get_key_pinnacle_usb_grey; 610 break; 611 case EM2820_BOARD_HAUPPAUGE_WINTV_USB_2: 612 rc->map_name = RC_MAP_HAUPPAUGE; 613 ir->get_key_i2c = em28xx_get_key_em_haup; 614 rc->allowed_protos = RC_BIT_RC5; 615 break; 616 case EM2820_BOARD_LEADTEK_WINFAST_USBII_DELUXE: 617 rc->map_name = RC_MAP_WINFAST_USBII_DELUXE; 618 ir->get_key_i2c = em28xx_get_key_winfast_usbii_deluxe; 619 break; 620 default: 621 err = -ENODEV; 622 goto error; 623 } 624 625 ir->i2c_dev_addr = i2c_rc_dev_addr; 626 } else { /* internal device */ 627 switch (dev->chip_id) { 628 case CHIP_ID_EM2860: 629 case CHIP_ID_EM2883: 630 rc->allowed_protos = RC_BIT_RC5 | RC_BIT_NEC; 631 ir->get_key = default_polling_getkey; 632 break; 633 case CHIP_ID_EM2884: 634 case CHIP_ID_EM2874: 635 case CHIP_ID_EM28174: 636 ir->get_key = em2874_polling_getkey; 637 rc->allowed_protos = RC_BIT_RC5 | RC_BIT_NEC | 638 RC_BIT_RC6_0; 639 break; 640 default: 641 err = -ENODEV; 642 goto error; 643 } 644 645 rc->change_protocol = em28xx_ir_change_protocol; 646 rc->map_name = dev->board.ir_codes; 647 648 /* By default, keep protocol field untouched */ 649 rc_type = RC_BIT_UNKNOWN; 650 err = em28xx_ir_change_protocol(rc, &rc_type); 651 if (err) 652 goto error; 653 } 654 655 /* This is how often we ask the chip for IR information */ 656 ir->polling = 100; /* ms */ 657 658 /* init input device */ 659 snprintf(ir->name, sizeof(ir->name), "em28xx IR (%s)", dev->name); 660 661 usb_make_path(dev->udev, ir->phys, sizeof(ir->phys)); 662 strlcat(ir->phys, "/input0", sizeof(ir->phys)); 663 664 rc->input_name = ir->name; 665 rc->input_phys = ir->phys; 666 rc->input_id.bustype = BUS_USB; 667 rc->input_id.version = 1; 668 rc->input_id.vendor = le16_to_cpu(dev->udev->descriptor.idVendor); 669 rc->input_id.product = le16_to_cpu(dev->udev->descriptor.idProduct); 670 rc->dev.parent = &dev->udev->dev; 671 rc->driver_name = MODULE_NAME; 672 673 /* all done */ 674 err = rc_register_device(rc); 675 if (err) 676 goto error; 677 678 return 0; 679 680 error: 681 dev->ir = NULL; 682 rc_free_device(rc); 683 kfree(ir); 684 return err; 685 } 686 687 static int em28xx_ir_fini(struct em28xx *dev) 688 { 689 struct em28xx_IR *ir = dev->ir; 690 691 em28xx_deregister_snapshot_button(dev); 692 693 /* skip detach on non attached boards */ 694 if (!ir) 695 return 0; 696 697 if (ir->rc) 698 rc_unregister_device(ir->rc); 699 700 /* done */ 701 kfree(ir); 702 dev->ir = NULL; 703 return 0; 704 } 705 706 static struct em28xx_ops rc_ops = { 707 .id = EM28XX_RC, 708 .name = "Em28xx Input Extension", 709 .init = em28xx_ir_init, 710 .fini = em28xx_ir_fini, 711 }; 712 713 static int __init em28xx_rc_register(void) 714 { 715 return em28xx_register_extension(&rc_ops); 716 } 717 718 static void __exit em28xx_rc_unregister(void) 719 { 720 em28xx_unregister_extension(&rc_ops); 721 } 722 723 MODULE_LICENSE("GPL"); 724 MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@redhat.com>"); 725 MODULE_DESCRIPTION("Em28xx Input driver"); 726 727 module_init(em28xx_rc_register); 728 module_exit(em28xx_rc_unregister); 729