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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_CAMERA22#define EM28XX_BUTTONS_DEBOUNCED_QUERY_INTERVAL 500 /* [ms] */23#define EM28XX_BUTTONS_VOLATILE_QUERY_INTERVAL 100 /* [ms] */24 25static unsigned int ir_debug;26module_param(ir_debug, int, 0644);27MODULE_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's39 */40 41struct 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 49struct 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-i2c70 */71 72static 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 hold88 * 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 103static 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 using122 * The original Hauppauge Grey IR and another RC5 that uses addr=0x08123 * The RC5 code has 14 bits, but we've experimentally determined124 * the meaning for only 11 bits.125 * So, the code translation is not complete. Yet, it is enough to126 * 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 133static 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 152static 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 = 1163 }, {164 .addr = i2c_dev->addr,165 .flags = I2C_M_RD,166 .buf = &keydetect,167 .len = 1168 }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 functions191 */192 193/* This is for the em2860/em2880 */194static 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 code203 * on registers 0x45, 0x46 and 0x47204 */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 237static 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 code246 * on registers 0x51-55247 */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 em28xx291 */292 293static 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 313static 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 else335 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 the344 * register is read. The em2860/2880 datasheet says345 * that it is supposed to clear the readcount, but it346 * doesn't. So with the em2874, we are looking for a347 * non-zero read count as opposed to a readcount348 * that is incrementing349 */350 ir->last_readcount = 0;351 else352 ir->last_readcount = poll_result.read_count;353 }354}355 356static 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 367static 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 377static 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 384static 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 412static 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 448static 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 471static 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-device476 * at address 0x18, so if that address is needed for another board in477 * the future, please put it after 0x1f.478 */479 static const unsigned short addr_list[] = {480 0x1f, 0x30, 0x47, I2C_CLIENT_END481 };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 buttons495 */496 497static 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 575static 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 611static 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_addresses631 >= 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;659next_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 673static 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 687static 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 828error:829 kfree(ir->i2c_client);830 dev->ir = NULL;831 rc_free_device(rc);832 kfree(ir);833ref_put:834 em28xx_shutdown_buttons(dev);835 return err;836}837 838static 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 863ref_put:864 kref_put(&dev->ref, em28xx_free_device);865 866 return 0;867}868 869static 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 event882 * kthread needs stopping? kthread is stopped in883 * ir_raw_event_unregister()884 */885 return 0;886}887 888static 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 call898 * 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 908static 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 917static int __init em28xx_rc_register(void)918{919 return em28xx_register_extension(&rc_ops);920}921 922static void __exit em28xx_rc_unregister(void)923{924 em28xx_unregister_extension(&rc_ops);925}926 927MODULE_LICENSE("GPL v2");928MODULE_AUTHOR("Mauro Carvalho Chehab");929MODULE_DESCRIPTION(DRIVER_DESC " - input interface");930MODULE_VERSION(EM28XX_VERSION);931 932module_init(em28xx_rc_register);933module_exit(em28xx_rc_unregister);934