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(i2c_dev, &b, 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(i2c_dev, buf, 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(i2c_dev, buf, 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(i2c_dev->adapter, msg, 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(i2c_dev->adapter, msg, 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(msg[1], msg[2], msg[3], msg[4], 271 &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(ir->rc, protocol, scancode, 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(ir->rc, 331 poll_result.protocol, 332 poll_result.scancode, 333 poll_result.toggle_bit); 334 else 335 rc_keydown(ir->rc, 336 RC_PROTO_UNKNOWN, 337 poll_result.scancode & 0xff, 338 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(&ir->work, msecs_to_jiffies(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(&ir->work, 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(&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, 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, &ir_config, 1); 440 em28xx_write_reg_bits(dev, EM28XX_R0F_XCLK, 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(&dev->i2c_adap[dev->def_i2c_bus], 485 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, 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, button->reg_clearing, 536 (~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->sbutton_input_dev, 547 EM28XX_SNAPSHOT_KEY, 1); 548 /* Unpress the key */ 549 input_report_key(dev->sbutton_input_dev, 550 EM28XX_SNAPSHOT_KEY, 0); 551 break; 552 case EM28XX_BUTTON_ILLUMINATION: 553 led = em28xx_find_led(dev, 554 EM28XX_LED_ILLUMINATION); 555 /* Switch illumination LED on/off */ 556 if (led) 557 em28xx_toggle_reg_bits(dev, 558 led->gpio_reg, 559 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(&dev->buttons_query_work, 572 msecs_to_jiffies(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(udev, dev->snapshot_button_path, 587 sizeof(dev->snapshot_button_path)); 588 strlcat(dev->snapshot_button_path, "/sbutton", 589 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, input_dev->keybit); 595 input_dev->keycodesize = 0; 596 input_dev->keycodemax = 0; 597 usb_to_input_id(udev, &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(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, 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(&dev->buttons_query_work, 669 msecs_to_jiffies(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(&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(&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(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(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, &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(udev, ir->phys, sizeof(ir->phys)); 811 strlcat(ir->phys, "/input0", sizeof(ir->phys)); 812 813 rc->device_name = em28xx_boards[dev->model].name; 814 rc->input_phys = ir->phys; 815 usb_to_input_id(udev, &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(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(ir->i2c_client); 830 dev->ir = NULL; 831 rc_free_device(rc); 832 kfree(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(ir->rc); 856 857 kfree(ir->i2c_client); 858 859 /* done */ 860 kfree(ir); 861 dev->ir = NULL; 862 863 ref_put: 864 kref_put(&dev->ref, 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(&ir->work); 879 cancel_delayed_work_sync(&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(&ir->work, msecs_to_jiffies(ir->polling)); 902 if (dev->num_button_polling_addresses) 903 schedule_delayed_work(&dev->buttons_query_work, 904 msecs_to_jiffies(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(&rc_ops); 920 } 921 922 static void __exit em28xx_rc_unregister(void) 923 { 924 em28xx_unregister_extension(&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