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