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 "em28xx.h" 25 26 #include <linux/module.h> 27 #include <linux/init.h> 28 #include <linux/delay.h> 29 #include <linux/interrupt.h> 30 #include <linux/usb.h> 31 #include <linux/slab.h> 32 #include <linux/bitrev.h> 33 34 #define EM28XX_SNAPSHOT_KEY KEY_CAMERA 35 #define EM28XX_BUTTONS_DEBOUNCED_QUERY_INTERVAL 500 /* [ms] */ 36 #define EM28XX_BUTTONS_VOLATILE_QUERY_INTERVAL 100 /* [ms] */ 37 38 static unsigned int ir_debug; 39 module_param(ir_debug, int, 0644); 40 MODULE_PARM_DESC(ir_debug, "enable debug messages [IR]"); 41 42 #define MODULE_NAME "em28xx" 43 44 #define dprintk( fmt, arg...) do { \ 45 if (ir_debug) \ 46 dev_printk(KERN_DEBUG, &ir->dev->intf->dev, \ 47 "input: %s: " fmt, __func__, ## arg); \ 48 } while (0) 49 50 /********************************************************** 51 Polling structure used by em28xx IR's 52 **********************************************************/ 53 54 struct em28xx_ir_poll_result { 55 unsigned int toggle_bit:1; 56 unsigned int read_count:7; 57 58 enum rc_proto protocol; 59 u32 scancode; 60 }; 61 62 struct em28xx_IR { 63 struct em28xx *dev; 64 struct rc_dev *rc; 65 char name[32]; 66 char phys[32]; 67 68 /* poll decoder */ 69 int polling; 70 struct delayed_work work; 71 unsigned int full_code:1; 72 unsigned int last_readcount; 73 u64 rc_proto; 74 75 struct i2c_client *i2c_client; 76 77 int (*get_key_i2c)(struct i2c_client *ir, enum rc_proto *protocol, 78 u32 *scancode); 79 int (*get_key)(struct em28xx_IR *, struct em28xx_ir_poll_result *); 80 }; 81 82 /********************************************************** 83 I2C IR based get keycodes - should be used with ir-kbd-i2c 84 **********************************************************/ 85 86 static int em28xx_get_key_terratec(struct i2c_client *i2c_dev, 87 enum rc_proto *protocol, u32 *scancode) 88 { 89 unsigned char b; 90 91 /* poll IR chip */ 92 if (1 != i2c_master_recv(i2c_dev, &b, 1)) 93 return -EIO; 94 95 /* it seems that 0xFE indicates that a button is still hold 96 down, while 0xff indicates that no button is hold down. */ 97 98 if (b == 0xff) 99 return 0; 100 101 if (b == 0xfe) 102 /* keep old data */ 103 return 1; 104 105 *protocol = RC_PROTO_UNKNOWN; 106 *scancode = b; 107 return 1; 108 } 109 110 static int em28xx_get_key_em_haup(struct i2c_client *i2c_dev, 111 enum rc_proto *protocol, u32 *scancode) 112 { 113 unsigned char buf[2]; 114 int size; 115 116 /* poll IR chip */ 117 size = i2c_master_recv(i2c_dev, buf, sizeof(buf)); 118 119 if (size != 2) 120 return -EIO; 121 122 /* Does eliminate repeated parity code */ 123 if (buf[1] == 0xff) 124 return 0; 125 126 /* 127 * Rearranges bits to the right order. 128 * The bit order were determined experimentally by using 129 * The original Hauppauge Grey IR and another RC5 that uses addr=0x08 130 * The RC5 code has 14 bits, but we've experimentally determined 131 * the meaning for only 11 bits. 132 * So, the code translation is not complete. Yet, it is enough to 133 * work with the provided RC5 IR. 134 */ 135 *protocol = RC_PROTO_RC5; 136 *scancode = (bitrev8(buf[1]) & 0x1f) << 8 | bitrev8(buf[0]) >> 2; 137 return 1; 138 } 139 140 static int em28xx_get_key_pinnacle_usb_grey(struct i2c_client *i2c_dev, 141 enum rc_proto *protocol, 142 u32 *scancode) 143 { 144 unsigned char buf[3]; 145 146 /* poll IR chip */ 147 148 if (3 != i2c_master_recv(i2c_dev, buf, 3)) 149 return -EIO; 150 151 if (buf[0] != 0x00) 152 return 0; 153 154 *protocol = RC_PROTO_UNKNOWN; 155 *scancode = buf[2] & 0x3f; 156 return 1; 157 } 158 159 static int em28xx_get_key_winfast_usbii_deluxe(struct i2c_client *i2c_dev, 160 enum rc_proto *protocol, 161 u32 *scancode) 162 { 163 unsigned char subaddr, keydetect, key; 164 165 struct i2c_msg msg[] = { { .addr = i2c_dev->addr, .flags = 0, .buf = &subaddr, .len = 1}, 166 { .addr = i2c_dev->addr, .flags = I2C_M_RD, .buf = &keydetect, .len = 1} }; 167 168 subaddr = 0x10; 169 if (2 != i2c_transfer(i2c_dev->adapter, msg, 2)) 170 return -EIO; 171 if (keydetect == 0x00) 172 return 0; 173 174 subaddr = 0x00; 175 msg[1].buf = &key; 176 if (2 != i2c_transfer(i2c_dev->adapter, msg, 2)) 177 return -EIO; 178 if (key == 0x00) 179 return 0; 180 181 *protocol = RC_PROTO_UNKNOWN; 182 *scancode = key; 183 return 1; 184 } 185 186 /********************************************************** 187 Poll based get keycode functions 188 **********************************************************/ 189 190 /* This is for the em2860/em2880 */ 191 static int default_polling_getkey(struct em28xx_IR *ir, 192 struct em28xx_ir_poll_result *poll_result) 193 { 194 struct em28xx *dev = ir->dev; 195 int rc; 196 u8 msg[3] = { 0, 0, 0 }; 197 198 /* Read key toggle, brand, and key code 199 on registers 0x45, 0x46 and 0x47 200 */ 201 rc = dev->em28xx_read_reg_req_len(dev, 0, EM28XX_R45_IR, 202 msg, sizeof(msg)); 203 if (rc < 0) 204 return rc; 205 206 /* Infrared toggle (Reg 0x45[7]) */ 207 poll_result->toggle_bit = (msg[0] >> 7); 208 209 /* Infrared read count (Reg 0x45[6:0] */ 210 poll_result->read_count = (msg[0] & 0x7f); 211 212 /* Remote Control Address/Data (Regs 0x46/0x47) */ 213 switch (ir->rc_proto) { 214 case RC_PROTO_BIT_RC5: 215 poll_result->protocol = RC_PROTO_RC5; 216 poll_result->scancode = RC_SCANCODE_RC5(msg[1], msg[2]); 217 break; 218 219 case RC_PROTO_BIT_NEC: 220 poll_result->protocol = RC_PROTO_NEC; 221 poll_result->scancode = RC_SCANCODE_NEC(msg[1], msg[2]); 222 break; 223 224 default: 225 poll_result->protocol = RC_PROTO_UNKNOWN; 226 poll_result->scancode = msg[1] << 8 | msg[2]; 227 break; 228 } 229 230 return 0; 231 } 232 233 static int em2874_polling_getkey(struct em28xx_IR *ir, 234 struct em28xx_ir_poll_result *poll_result) 235 { 236 struct em28xx *dev = ir->dev; 237 int rc; 238 u8 msg[5] = { 0, 0, 0, 0, 0 }; 239 240 /* Read key toggle, brand, and key code 241 on registers 0x51-55 242 */ 243 rc = dev->em28xx_read_reg_req_len(dev, 0, EM2874_R51_IR, 244 msg, sizeof(msg)); 245 if (rc < 0) 246 return rc; 247 248 /* Infrared toggle (Reg 0x51[7]) */ 249 poll_result->toggle_bit = (msg[0] >> 7); 250 251 /* Infrared read count (Reg 0x51[6:0] */ 252 poll_result->read_count = (msg[0] & 0x7f); 253 254 /* 255 * Remote Control Address (Reg 0x52) 256 * Remote Control Data (Reg 0x53-0x55) 257 */ 258 switch (ir->rc_proto) { 259 case RC_PROTO_BIT_RC5: 260 poll_result->protocol = RC_PROTO_RC5; 261 poll_result->scancode = RC_SCANCODE_RC5(msg[1], msg[2]); 262 break; 263 264 case RC_PROTO_BIT_NEC: 265 poll_result->scancode = msg[1] << 8 | msg[2]; 266 if ((msg[3] ^ msg[4]) != 0xff) { /* 32 bits NEC */ 267 poll_result->protocol = RC_PROTO_NEC32; 268 poll_result->scancode = RC_SCANCODE_NEC32((msg[1] << 24) | 269 (msg[2] << 16) | 270 (msg[3] << 8) | 271 (msg[4])); 272 } else if ((msg[1] ^ msg[2]) != 0xff) { /* 24 bits NEC */ 273 poll_result->protocol = RC_PROTO_NECX; 274 poll_result->scancode = RC_SCANCODE_NECX(msg[1] << 8 | 275 msg[2], msg[3]); 276 } else { /* Normal NEC */ 277 poll_result->protocol = RC_PROTO_NEC; 278 poll_result->scancode = RC_SCANCODE_NEC(msg[1], msg[3]); 279 } 280 break; 281 282 case RC_PROTO_BIT_RC6_0: 283 poll_result->protocol = RC_PROTO_RC6_0; 284 poll_result->scancode = RC_SCANCODE_RC6_0(msg[1], msg[2]); 285 break; 286 287 default: 288 poll_result->protocol = RC_PROTO_UNKNOWN; 289 poll_result->scancode = (msg[1] << 24) | (msg[2] << 16) | 290 (msg[3] << 8) | msg[4]; 291 break; 292 } 293 294 return 0; 295 } 296 297 /********************************************************** 298 Polling code for em28xx 299 **********************************************************/ 300 301 static int em28xx_i2c_ir_handle_key(struct em28xx_IR *ir) 302 { 303 static u32 scancode; 304 enum rc_proto protocol; 305 int rc; 306 307 rc = ir->get_key_i2c(ir->i2c_client, &protocol, &scancode); 308 if (rc < 0) { 309 dprintk("ir->get_key_i2c() failed: %d\n", rc); 310 return rc; 311 } 312 313 if (rc) { 314 dprintk("%s: proto = 0x%04x, scancode = 0x%04x\n", 315 __func__, protocol, scancode); 316 rc_keydown(ir->rc, protocol, scancode, 0); 317 } 318 return 0; 319 } 320 321 static void em28xx_ir_handle_key(struct em28xx_IR *ir) 322 { 323 int result; 324 struct em28xx_ir_poll_result poll_result; 325 326 /* read the registers containing the IR status */ 327 result = ir->get_key(ir, &poll_result); 328 if (unlikely(result < 0)) { 329 dprintk("ir->get_key() failed: %d\n", result); 330 return; 331 } 332 333 if (unlikely(poll_result.read_count != ir->last_readcount)) { 334 dprintk("%s: toggle: %d, count: %d, key 0x%04x\n", __func__, 335 poll_result.toggle_bit, poll_result.read_count, 336 poll_result.scancode); 337 if (ir->full_code) 338 rc_keydown(ir->rc, 339 poll_result.protocol, 340 poll_result.scancode, 341 poll_result.toggle_bit); 342 else 343 rc_keydown(ir->rc, 344 RC_PROTO_UNKNOWN, 345 poll_result.scancode & 0xff, 346 poll_result.toggle_bit); 347 348 if (ir->dev->chip_id == CHIP_ID_EM2874 || 349 ir->dev->chip_id == CHIP_ID_EM2884) 350 /* The em2874 clears the readcount field every time the 351 register is read. The em2860/2880 datasheet says that it 352 is supposed to clear the readcount, but it doesn't. So with 353 the em2874, we are looking for a non-zero read count as 354 opposed to a readcount that is incrementing */ 355 ir->last_readcount = 0; 356 else 357 ir->last_readcount = poll_result.read_count; 358 } 359 } 360 361 static void em28xx_ir_work(struct work_struct *work) 362 { 363 struct em28xx_IR *ir = container_of(work, struct em28xx_IR, work.work); 364 365 if (ir->i2c_client) /* external i2c device */ 366 em28xx_i2c_ir_handle_key(ir); 367 else /* internal device */ 368 em28xx_ir_handle_key(ir); 369 schedule_delayed_work(&ir->work, msecs_to_jiffies(ir->polling)); 370 } 371 372 static int em28xx_ir_start(struct rc_dev *rc) 373 { 374 struct em28xx_IR *ir = rc->priv; 375 376 INIT_DELAYED_WORK(&ir->work, em28xx_ir_work); 377 schedule_delayed_work(&ir->work, 0); 378 379 return 0; 380 } 381 382 static void em28xx_ir_stop(struct rc_dev *rc) 383 { 384 struct em28xx_IR *ir = rc->priv; 385 386 cancel_delayed_work_sync(&ir->work); 387 } 388 389 static int em2860_ir_change_protocol(struct rc_dev *rc_dev, u64 *rc_proto) 390 { 391 struct em28xx_IR *ir = rc_dev->priv; 392 struct em28xx *dev = ir->dev; 393 394 /* Adjust xclk based on IR table for RC5/NEC tables */ 395 if (*rc_proto & RC_PROTO_BIT_RC5) { 396 dev->board.xclk |= EM28XX_XCLK_IR_RC5_MODE; 397 ir->full_code = 1; 398 *rc_proto = RC_PROTO_BIT_RC5; 399 } else if (*rc_proto & RC_PROTO_BIT_NEC) { 400 dev->board.xclk &= ~EM28XX_XCLK_IR_RC5_MODE; 401 ir->full_code = 1; 402 *rc_proto = RC_PROTO_BIT_NEC; 403 } else if (*rc_proto & RC_PROTO_BIT_UNKNOWN) { 404 *rc_proto = RC_PROTO_BIT_UNKNOWN; 405 } else { 406 *rc_proto = ir->rc_proto; 407 return -EINVAL; 408 } 409 em28xx_write_reg_bits(dev, EM28XX_R0F_XCLK, dev->board.xclk, 410 EM28XX_XCLK_IR_RC5_MODE); 411 412 ir->rc_proto = *rc_proto; 413 414 return 0; 415 } 416 417 static int em2874_ir_change_protocol(struct rc_dev *rc_dev, u64 *rc_proto) 418 { 419 struct em28xx_IR *ir = rc_dev->priv; 420 struct em28xx *dev = ir->dev; 421 u8 ir_config = EM2874_IR_RC5; 422 423 /* Adjust xclk and set type based on IR table for RC5/NEC/RC6 tables */ 424 if (*rc_proto & RC_PROTO_BIT_RC5) { 425 dev->board.xclk |= EM28XX_XCLK_IR_RC5_MODE; 426 ir->full_code = 1; 427 *rc_proto = RC_PROTO_BIT_RC5; 428 } else if (*rc_proto & RC_PROTO_BIT_NEC) { 429 dev->board.xclk &= ~EM28XX_XCLK_IR_RC5_MODE; 430 ir_config = EM2874_IR_NEC | EM2874_IR_NEC_NO_PARITY; 431 ir->full_code = 1; 432 *rc_proto = RC_PROTO_BIT_NEC; 433 } else if (*rc_proto & RC_PROTO_BIT_RC6_0) { 434 dev->board.xclk |= EM28XX_XCLK_IR_RC5_MODE; 435 ir_config = EM2874_IR_RC6_MODE_0; 436 ir->full_code = 1; 437 *rc_proto = RC_PROTO_BIT_RC6_0; 438 } else if (*rc_proto & RC_PROTO_BIT_UNKNOWN) { 439 *rc_proto = RC_PROTO_BIT_UNKNOWN; 440 } else { 441 *rc_proto = ir->rc_proto; 442 return -EINVAL; 443 } 444 em28xx_write_regs(dev, EM2874_R50_IR_CONFIG, &ir_config, 1); 445 em28xx_write_reg_bits(dev, EM28XX_R0F_XCLK, dev->board.xclk, 446 EM28XX_XCLK_IR_RC5_MODE); 447 448 ir->rc_proto = *rc_proto; 449 450 return 0; 451 } 452 453 static int em28xx_ir_change_protocol(struct rc_dev *rc_dev, u64 *rc_proto) 454 { 455 struct em28xx_IR *ir = rc_dev->priv; 456 struct em28xx *dev = ir->dev; 457 458 /* Setup the proper handler based on the chip */ 459 switch (dev->chip_id) { 460 case CHIP_ID_EM2860: 461 case CHIP_ID_EM2883: 462 return em2860_ir_change_protocol(rc_dev, rc_proto); 463 case CHIP_ID_EM2884: 464 case CHIP_ID_EM2874: 465 case CHIP_ID_EM28174: 466 case CHIP_ID_EM28178: 467 return em2874_ir_change_protocol(rc_dev, rc_proto); 468 default: 469 dev_err(&ir->dev->intf->dev, 470 "Unrecognized em28xx chip id 0x%02x: IR not supported\n", 471 dev->chip_id); 472 return -EINVAL; 473 } 474 } 475 476 static int em28xx_probe_i2c_ir(struct em28xx *dev) 477 { 478 int i = 0; 479 /* Leadtek winfast tv USBII deluxe can find a non working IR-device */ 480 /* at address 0x18, so if that address is needed for another board in */ 481 /* the future, please put it after 0x1f. */ 482 const unsigned short addr_list[] = { 483 0x1f, 0x30, 0x47, I2C_CLIENT_END 484 }; 485 486 while (addr_list[i] != I2C_CLIENT_END) { 487 if (i2c_probe_func_quick_read(&dev->i2c_adap[dev->def_i2c_bus], addr_list[i]) == 1) 488 return addr_list[i]; 489 i++; 490 } 491 492 return -ENODEV; 493 } 494 495 /********************************************************** 496 Handle buttons 497 **********************************************************/ 498 499 static void em28xx_query_buttons(struct work_struct *work) 500 { 501 struct em28xx *dev = 502 container_of(work, struct em28xx, buttons_query_work.work); 503 u8 i, j; 504 int regval; 505 bool is_pressed, was_pressed; 506 const struct em28xx_led *led; 507 508 /* Poll and evaluate all addresses */ 509 for (i = 0; i < dev->num_button_polling_addresses; i++) { 510 /* Read value from register */ 511 regval = em28xx_read_reg(dev, dev->button_polling_addresses[i]); 512 if (regval < 0) 513 continue; 514 /* Check states of the buttons and act */ 515 j = 0; 516 while (dev->board.buttons[j].role >= 0 && 517 dev->board.buttons[j].role < EM28XX_NUM_BUTTON_ROLES) { 518 struct em28xx_button *button = &dev->board.buttons[j]; 519 /* Check if button uses the current address */ 520 if (button->reg_r != dev->button_polling_addresses[i]) { 521 j++; 522 continue; 523 } 524 /* Determine if button is and was pressed last time */ 525 is_pressed = regval & button->mask; 526 was_pressed = dev->button_polling_last_values[i] 527 & button->mask; 528 if (button->inverted) { 529 is_pressed = !is_pressed; 530 was_pressed = !was_pressed; 531 } 532 /* Clear button state (if needed) */ 533 if (is_pressed && button->reg_clearing) 534 em28xx_write_reg(dev, button->reg_clearing, 535 (~regval & button->mask) 536 | (regval & ~button->mask)); 537 /* Handle button state */ 538 if (!is_pressed || was_pressed) { 539 j++; 540 continue; 541 } 542 switch (button->role) { 543 case EM28XX_BUTTON_SNAPSHOT: 544 /* Emulate the keypress */ 545 input_report_key(dev->sbutton_input_dev, 546 EM28XX_SNAPSHOT_KEY, 1); 547 /* Unpress the key */ 548 input_report_key(dev->sbutton_input_dev, 549 EM28XX_SNAPSHOT_KEY, 0); 550 break; 551 case EM28XX_BUTTON_ILLUMINATION: 552 led = em28xx_find_led(dev, 553 EM28XX_LED_ILLUMINATION); 554 /* Switch illumination LED on/off */ 555 if (led) 556 em28xx_toggle_reg_bits(dev, 557 led->gpio_reg, 558 led->gpio_mask); 559 break; 560 default: 561 WARN_ONCE(1, "BUG: unhandled button role."); 562 } 563 /* Next button */ 564 j++; 565 } 566 /* Save current value for comparison during the next polling */ 567 dev->button_polling_last_values[i] = regval; 568 } 569 /* Schedule next poll */ 570 schedule_delayed_work(&dev->buttons_query_work, 571 msecs_to_jiffies(dev->button_polling_interval)); 572 } 573 574 static int em28xx_register_snapshot_button(struct em28xx *dev) 575 { 576 struct usb_device *udev = interface_to_usbdev(dev->intf); 577 struct input_dev *input_dev; 578 int err; 579 580 dev_info(&dev->intf->dev, "Registering snapshot button...\n"); 581 input_dev = input_allocate_device(); 582 if (!input_dev) 583 return -ENOMEM; 584 585 usb_make_path(udev, dev->snapshot_button_path, 586 sizeof(dev->snapshot_button_path)); 587 strlcat(dev->snapshot_button_path, "/sbutton", 588 sizeof(dev->snapshot_button_path)); 589 590 input_dev->name = "em28xx snapshot button"; 591 input_dev->phys = dev->snapshot_button_path; 592 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP); 593 set_bit(EM28XX_SNAPSHOT_KEY, input_dev->keybit); 594 input_dev->keycodesize = 0; 595 input_dev->keycodemax = 0; 596 input_dev->id.bustype = BUS_USB; 597 input_dev->id.vendor = le16_to_cpu(udev->descriptor.idVendor); 598 input_dev->id.product = le16_to_cpu(udev->descriptor.idProduct); 599 input_dev->id.version = 1; 600 input_dev->dev.parent = &dev->intf->dev; 601 602 err = input_register_device(input_dev); 603 if (err) { 604 dev_err(&dev->intf->dev, "input_register_device failed\n"); 605 input_free_device(input_dev); 606 return err; 607 } 608 609 dev->sbutton_input_dev = input_dev; 610 return 0; 611 } 612 613 static void em28xx_init_buttons(struct em28xx *dev) 614 { 615 u8 i = 0, j = 0; 616 bool addr_new = false; 617 618 dev->button_polling_interval = EM28XX_BUTTONS_DEBOUNCED_QUERY_INTERVAL; 619 while (dev->board.buttons[i].role >= 0 && 620 dev->board.buttons[i].role < EM28XX_NUM_BUTTON_ROLES) { 621 struct em28xx_button *button = &dev->board.buttons[i]; 622 /* Check if polling address is already on the list */ 623 addr_new = true; 624 for (j = 0; j < dev->num_button_polling_addresses; j++) { 625 if (button->reg_r == dev->button_polling_addresses[j]) { 626 addr_new = false; 627 break; 628 } 629 } 630 /* Check if max. number of polling addresses is exceeded */ 631 if (addr_new && dev->num_button_polling_addresses 632 >= EM28XX_NUM_BUTTON_ADDRESSES_MAX) { 633 WARN_ONCE(1, "BUG: maximum number of button polling addresses exceeded."); 634 goto next_button; 635 } 636 /* Button role specific checks and actions */ 637 if (button->role == EM28XX_BUTTON_SNAPSHOT) { 638 /* Register input device */ 639 if (em28xx_register_snapshot_button(dev) < 0) 640 goto next_button; 641 } else if (button->role == EM28XX_BUTTON_ILLUMINATION) { 642 /* Check sanity */ 643 if (!em28xx_find_led(dev, EM28XX_LED_ILLUMINATION)) { 644 dev_err(&dev->intf->dev, 645 "BUG: illumination button defined, but no illumination LED.\n"); 646 goto next_button; 647 } 648 } 649 /* Add read address to list of polling addresses */ 650 if (addr_new) { 651 unsigned int index = dev->num_button_polling_addresses; 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 != NULL) { 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 return -ENODEV; 714 } 715 } 716 717 if (dev->board.ir_codes == NULL && !dev->board.has_ir_i2c) { 718 /* No remote control support */ 719 dev_warn(&dev->intf->dev, 720 "Remote control support is not available for this card.\n"); 721 return 0; 722 } 723 724 dev_info(&dev->intf->dev, "Registering input extension\n"); 725 726 ir = kzalloc(sizeof(*ir), GFP_KERNEL); 727 if (!ir) 728 return -ENOMEM; 729 rc = rc_allocate_device(RC_DRIVER_SCANCODE); 730 if (!rc) 731 goto error; 732 733 /* record handles to ourself */ 734 ir->dev = dev; 735 dev->ir = ir; 736 ir->rc = rc; 737 738 rc->priv = ir; 739 rc->open = em28xx_ir_start; 740 rc->close = em28xx_ir_stop; 741 742 if (dev->board.has_ir_i2c) { /* external i2c device */ 743 switch (dev->model) { 744 case EM2800_BOARD_TERRATEC_CINERGY_200: 745 case EM2820_BOARD_TERRATEC_CINERGY_250: 746 rc->map_name = RC_MAP_EM_TERRATEC; 747 ir->get_key_i2c = em28xx_get_key_terratec; 748 break; 749 case EM2820_BOARD_PINNACLE_USB_2: 750 rc->map_name = RC_MAP_PINNACLE_GREY; 751 ir->get_key_i2c = em28xx_get_key_pinnacle_usb_grey; 752 break; 753 case EM2820_BOARD_HAUPPAUGE_WINTV_USB_2: 754 rc->map_name = RC_MAP_HAUPPAUGE; 755 ir->get_key_i2c = em28xx_get_key_em_haup; 756 rc->allowed_protocols = RC_PROTO_BIT_RC5; 757 break; 758 case EM2820_BOARD_LEADTEK_WINFAST_USBII_DELUXE: 759 rc->map_name = RC_MAP_WINFAST_USBII_DELUXE; 760 ir->get_key_i2c = em28xx_get_key_winfast_usbii_deluxe; 761 break; 762 default: 763 err = -ENODEV; 764 goto error; 765 } 766 767 ir->i2c_client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL); 768 if (!ir->i2c_client) 769 goto error; 770 ir->i2c_client->adapter = &ir->dev->i2c_adap[dev->def_i2c_bus]; 771 ir->i2c_client->addr = i2c_rc_dev_addr; 772 ir->i2c_client->flags = 0; 773 /* NOTE: all other fields of i2c_client are unused */ 774 } else { /* internal device */ 775 switch (dev->chip_id) { 776 case CHIP_ID_EM2860: 777 case CHIP_ID_EM2883: 778 rc->allowed_protocols = RC_PROTO_BIT_RC5 | 779 RC_PROTO_BIT_NEC; 780 ir->get_key = default_polling_getkey; 781 break; 782 case CHIP_ID_EM2884: 783 case CHIP_ID_EM2874: 784 case CHIP_ID_EM28174: 785 case CHIP_ID_EM28178: 786 ir->get_key = em2874_polling_getkey; 787 rc->allowed_protocols = RC_PROTO_BIT_RC5 | 788 RC_PROTO_BIT_NEC | RC_PROTO_BIT_NECX | 789 RC_PROTO_BIT_NEC32 | RC_PROTO_BIT_RC6_0; 790 break; 791 default: 792 err = -ENODEV; 793 goto error; 794 } 795 796 rc->change_protocol = em28xx_ir_change_protocol; 797 rc->map_name = dev->board.ir_codes; 798 799 /* By default, keep protocol field untouched */ 800 rc_proto = RC_PROTO_BIT_UNKNOWN; 801 err = em28xx_ir_change_protocol(rc, &rc_proto); 802 if (err) 803 goto error; 804 } 805 806 /* This is how often we ask the chip for IR information */ 807 ir->polling = 100; /* ms */ 808 809 /* init input device */ 810 snprintf(ir->name, sizeof(ir->name), "%s IR", 811 dev_name(&dev->intf->dev)); 812 813 usb_make_path(udev, ir->phys, sizeof(ir->phys)); 814 strlcat(ir->phys, "/input0", sizeof(ir->phys)); 815 816 rc->device_name = ir->name; 817 rc->input_phys = ir->phys; 818 rc->input_id.bustype = BUS_USB; 819 rc->input_id.version = 1; 820 rc->input_id.vendor = le16_to_cpu(udev->descriptor.idVendor); 821 rc->input_id.product = le16_to_cpu(udev->descriptor.idProduct); 822 rc->dev.parent = &dev->intf->dev; 823 rc->driver_name = MODULE_NAME; 824 825 /* all done */ 826 err = rc_register_device(rc); 827 if (err) 828 goto error; 829 830 dev_info(&dev->intf->dev, "Input extension successfully initialized\n"); 831 832 return 0; 833 834 error: 835 kfree(ir->i2c_client); 836 dev->ir = NULL; 837 rc_free_device(rc); 838 kfree(ir); 839 return err; 840 } 841 842 static int em28xx_ir_fini(struct em28xx *dev) 843 { 844 struct em28xx_IR *ir = dev->ir; 845 846 if (dev->is_audio_only) { 847 /* Shouldn't initialize IR for this interface */ 848 return 0; 849 } 850 851 dev_info(&dev->intf->dev, "Closing input extension\n"); 852 853 em28xx_shutdown_buttons(dev); 854 855 /* skip detach on non attached boards */ 856 if (!ir) 857 goto ref_put; 858 859 rc_unregister_device(ir->rc); 860 861 kfree(ir->i2c_client); 862 863 /* done */ 864 kfree(ir); 865 dev->ir = NULL; 866 867 ref_put: 868 kref_put(&dev->ref, em28xx_free_device); 869 870 return 0; 871 } 872 873 static int em28xx_ir_suspend(struct em28xx *dev) 874 { 875 struct em28xx_IR *ir = dev->ir; 876 877 if (dev->is_audio_only) 878 return 0; 879 880 dev_info(&dev->intf->dev, "Suspending input extension\n"); 881 if (ir) 882 cancel_delayed_work_sync(&ir->work); 883 cancel_delayed_work_sync(&dev->buttons_query_work); 884 /* is canceling delayed work sufficient or does the rc event 885 kthread needs stopping? kthread is stopped in 886 ir_raw_event_unregister() */ 887 return 0; 888 } 889 890 static int em28xx_ir_resume(struct em28xx *dev) 891 { 892 struct em28xx_IR *ir = dev->ir; 893 894 if (dev->is_audio_only) 895 return 0; 896 897 dev_info(&dev->intf->dev, "Resuming input extension\n"); 898 /* if suspend calls ir_raw_event_unregister(), the should call 899 ir_raw_event_register() */ 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"); 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