1 /* 2 * 3 * Copyright (c) 2003 Gerd Knorr 4 * Copyright (c) 2003 Pavel Machek 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2 of the License, or 9 * (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, write to the Free Software 18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 19 */ 20 21 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 22 23 #include <linux/module.h> 24 #include <linux/init.h> 25 #include <linux/delay.h> 26 #include <linux/interrupt.h> 27 #include <linux/input.h> 28 #include <linux/slab.h> 29 30 #include "bttv.h" 31 #include "bttvp.h" 32 33 34 static int ir_debug; 35 module_param(ir_debug, int, 0644); 36 37 static int ir_rc5_remote_gap = 885; 38 module_param(ir_rc5_remote_gap, int, 0644); 39 40 #undef dprintk 41 #define dprintk(fmt, ...) \ 42 do { \ 43 if (ir_debug >= 1) \ 44 pr_info(fmt, ##__VA_ARGS__); \ 45 } while (0) 46 47 #define DEVNAME "bttv-input" 48 49 #define MODULE_NAME "bttv" 50 51 /* ---------------------------------------------------------------------- */ 52 53 static void ir_handle_key(struct bttv *btv) 54 { 55 struct bttv_ir *ir = btv->remote; 56 u32 gpio,data; 57 58 /* read gpio value */ 59 gpio = bttv_gpio_read(&btv->c); 60 if (ir->polling) { 61 if (ir->last_gpio == gpio) 62 return; 63 ir->last_gpio = gpio; 64 } 65 66 /* extract data */ 67 data = ir_extract_bits(gpio, ir->mask_keycode); 68 dprintk("irq gpio=0x%x code=%d | %s%s%s\n", 69 gpio, data, 70 ir->polling ? "poll" : "irq", 71 (gpio & ir->mask_keydown) ? " down" : "", 72 (gpio & ir->mask_keyup) ? " up" : ""); 73 74 if ((ir->mask_keydown && (gpio & ir->mask_keydown)) || 75 (ir->mask_keyup && !(gpio & ir->mask_keyup))) { 76 rc_keydown_notimeout(ir->dev, RC_TYPE_UNKNOWN, data, 0); 77 } else { 78 /* HACK: Probably, ir->mask_keydown is missing 79 for this board */ 80 if (btv->c.type == BTTV_BOARD_WINFAST2000) 81 rc_keydown_notimeout(ir->dev, RC_TYPE_UNKNOWN, data, 0); 82 83 rc_keyup(ir->dev); 84 } 85 } 86 87 static void ir_enltv_handle_key(struct bttv *btv) 88 { 89 struct bttv_ir *ir = btv->remote; 90 u32 gpio, data, keyup; 91 92 /* read gpio value */ 93 gpio = bttv_gpio_read(&btv->c); 94 95 /* extract data */ 96 data = ir_extract_bits(gpio, ir->mask_keycode); 97 98 /* Check if it is keyup */ 99 keyup = (gpio & ir->mask_keyup) ? 1 << 31 : 0; 100 101 if ((ir->last_gpio & 0x7f) != data) { 102 dprintk("gpio=0x%x code=%d | %s\n", 103 gpio, data, 104 (gpio & ir->mask_keyup) ? " up" : "up/down"); 105 106 rc_keydown_notimeout(ir->dev, RC_TYPE_UNKNOWN, data, 0); 107 if (keyup) 108 rc_keyup(ir->dev); 109 } else { 110 if ((ir->last_gpio & 1 << 31) == keyup) 111 return; 112 113 dprintk("(cnt) gpio=0x%x code=%d | %s\n", 114 gpio, data, 115 (gpio & ir->mask_keyup) ? " up" : "down"); 116 117 if (keyup) 118 rc_keyup(ir->dev); 119 else 120 rc_keydown_notimeout(ir->dev, RC_TYPE_UNKNOWN, data, 0); 121 } 122 123 ir->last_gpio = data | keyup; 124 } 125 126 static int bttv_rc5_irq(struct bttv *btv); 127 128 void bttv_input_irq(struct bttv *btv) 129 { 130 struct bttv_ir *ir = btv->remote; 131 132 if (ir->rc5_gpio) 133 bttv_rc5_irq(btv); 134 else if (!ir->polling) 135 ir_handle_key(btv); 136 } 137 138 static void bttv_input_timer(unsigned long data) 139 { 140 struct bttv *btv = (struct bttv*)data; 141 struct bttv_ir *ir = btv->remote; 142 143 if (btv->c.type == BTTV_BOARD_ENLTV_FM_2) 144 ir_enltv_handle_key(btv); 145 else 146 ir_handle_key(btv); 147 mod_timer(&ir->timer, jiffies + msecs_to_jiffies(ir->polling)); 148 } 149 150 /* 151 * FIXME: Nebula digi uses the legacy way to decode RC5, instead of relying 152 * on the rc-core way. As we need to be sure that both IRQ transitions are 153 * properly triggered, Better to touch it only with this hardware for 154 * testing. 155 */ 156 157 #define RC5_START(x) (((x) >> 12) & 0x03) 158 #define RC5_TOGGLE(x) (((x) >> 11) & 0x01) 159 #define RC5_ADDR(x) (((x) >> 6) & 0x1f) 160 #define RC5_INSTR(x) (((x) >> 0) & 0x3f) 161 162 /* decode raw bit pattern to RC5 code */ 163 static u32 bttv_rc5_decode(unsigned int code) 164 { 165 unsigned int org_code = code; 166 unsigned int pair; 167 unsigned int rc5 = 0; 168 int i; 169 170 for (i = 0; i < 14; ++i) { 171 pair = code & 0x3; 172 code >>= 2; 173 174 rc5 <<= 1; 175 switch (pair) { 176 case 0: 177 case 2: 178 break; 179 case 1: 180 rc5 |= 1; 181 break; 182 case 3: 183 dprintk("rc5_decode(%x) bad code\n", 184 org_code); 185 return 0; 186 } 187 } 188 dprintk("code=%x, rc5=%x, start=%x, toggle=%x, address=%x, " 189 "instr=%x\n", rc5, org_code, RC5_START(rc5), 190 RC5_TOGGLE(rc5), RC5_ADDR(rc5), RC5_INSTR(rc5)); 191 return rc5; 192 } 193 194 static void bttv_rc5_timer_end(unsigned long data) 195 { 196 struct bttv_ir *ir = (struct bttv_ir *)data; 197 struct timeval tv; 198 u32 gap, rc5, scancode; 199 u8 toggle, command, system; 200 201 /* get time */ 202 do_gettimeofday(&tv); 203 204 /* avoid overflow with gap >1s */ 205 if (tv.tv_sec - ir->base_time.tv_sec > 1) { 206 gap = 200000; 207 } else { 208 gap = 1000000 * (tv.tv_sec - ir->base_time.tv_sec) + 209 tv.tv_usec - ir->base_time.tv_usec; 210 } 211 212 /* signal we're ready to start a new code */ 213 ir->active = false; 214 215 /* Allow some timer jitter (RC5 is ~24ms anyway so this is ok) */ 216 if (gap < 28000) { 217 dprintk("spurious timer_end\n"); 218 return; 219 } 220 221 if (ir->last_bit < 20) { 222 /* ignore spurious codes (caused by light/other remotes) */ 223 dprintk("short code: %x\n", ir->code); 224 return; 225 } 226 227 ir->code = (ir->code << ir->shift_by) | 1; 228 rc5 = bttv_rc5_decode(ir->code); 229 230 toggle = RC5_TOGGLE(rc5); 231 system = RC5_ADDR(rc5); 232 command = RC5_INSTR(rc5); 233 234 switch (RC5_START(rc5)) { 235 case 0x3: 236 break; 237 case 0x2: 238 command += 0x40; 239 break; 240 default: 241 return; 242 } 243 244 scancode = RC_SCANCODE_RC5(system, command); 245 rc_keydown(ir->dev, RC_TYPE_RC5, scancode, toggle); 246 dprintk("scancode %x, toggle %x\n", scancode, toggle); 247 } 248 249 static int bttv_rc5_irq(struct bttv *btv) 250 { 251 struct bttv_ir *ir = btv->remote; 252 struct timeval tv; 253 u32 gpio; 254 u32 gap; 255 unsigned long current_jiffies; 256 257 /* read gpio port */ 258 gpio = bttv_gpio_read(&btv->c); 259 260 /* get time of bit */ 261 current_jiffies = jiffies; 262 do_gettimeofday(&tv); 263 264 /* avoid overflow with gap >1s */ 265 if (tv.tv_sec - ir->base_time.tv_sec > 1) { 266 gap = 200000; 267 } else { 268 gap = 1000000 * (tv.tv_sec - ir->base_time.tv_sec) + 269 tv.tv_usec - ir->base_time.tv_usec; 270 } 271 272 dprintk("RC5 IRQ: gap %d us for %s\n", 273 gap, (gpio & 0x20) ? "mark" : "space"); 274 275 /* remote IRQ? */ 276 if (!(gpio & 0x20)) 277 return 0; 278 279 /* active code => add bit */ 280 if (ir->active) { 281 /* only if in the code (otherwise spurious IRQ or timer 282 late) */ 283 if (ir->last_bit < 28) { 284 ir->last_bit = (gap - ir_rc5_remote_gap / 2) / 285 ir_rc5_remote_gap; 286 ir->code |= 1 << ir->last_bit; 287 } 288 /* starting new code */ 289 } else { 290 ir->active = true; 291 ir->code = 0; 292 ir->base_time = tv; 293 ir->last_bit = 0; 294 295 mod_timer(&ir->timer, current_jiffies + msecs_to_jiffies(30)); 296 } 297 298 /* toggle GPIO pin 4 to reset the irq */ 299 bttv_gpio_write(&btv->c, gpio & ~(1 << 4)); 300 bttv_gpio_write(&btv->c, gpio | (1 << 4)); 301 return 1; 302 } 303 304 /* ---------------------------------------------------------------------- */ 305 306 static void bttv_ir_start(struct bttv *btv, struct bttv_ir *ir) 307 { 308 if (ir->polling) { 309 setup_timer(&ir->timer, bttv_input_timer, (unsigned long)btv); 310 ir->timer.expires = jiffies + msecs_to_jiffies(1000); 311 add_timer(&ir->timer); 312 } else if (ir->rc5_gpio) { 313 /* set timer_end for code completion */ 314 setup_timer(&ir->timer, bttv_rc5_timer_end, (unsigned long)ir); 315 ir->shift_by = 1; 316 ir->rc5_remote_gap = ir_rc5_remote_gap; 317 } 318 } 319 320 static void bttv_ir_stop(struct bttv *btv) 321 { 322 if (btv->remote->polling) 323 del_timer_sync(&btv->remote->timer); 324 325 if (btv->remote->rc5_gpio) { 326 u32 gpio; 327 328 del_timer_sync(&btv->remote->timer); 329 330 gpio = bttv_gpio_read(&btv->c); 331 bttv_gpio_write(&btv->c, gpio & ~(1 << 4)); 332 } 333 } 334 335 /* 336 * Get_key functions used by I2C remotes 337 */ 338 339 static int get_key_pv951(struct IR_i2c *ir, enum rc_type *protocol, 340 u32 *scancode, u8 *toggle) 341 { 342 unsigned char b; 343 344 /* poll IR chip */ 345 if (1 != i2c_master_recv(ir->c, &b, 1)) { 346 dprintk("read error\n"); 347 return -EIO; 348 } 349 350 /* ignore 0xaa */ 351 if (b==0xaa) 352 return 0; 353 dprintk("key %02x\n", b); 354 355 /* 356 * NOTE: 357 * lirc_i2c maps the pv951 code as: 358 * addr = 0x61D6 359 * cmd = bit_reverse (b) 360 * So, it seems that this device uses NEC extended 361 * I decided to not fix the table, due to two reasons: 362 * 1) Without the actual device, this is only a guess; 363 * 2) As the addr is not reported via I2C, nor can be changed, 364 * the device is bound to the vendor-provided RC. 365 */ 366 367 *protocol = RC_TYPE_UNKNOWN; 368 *scancode = b; 369 *toggle = 0; 370 return 1; 371 } 372 373 /* Instantiate the I2C IR receiver device, if present */ 374 void init_bttv_i2c_ir(struct bttv *btv) 375 { 376 const unsigned short addr_list[] = { 377 0x1a, 0x18, 0x64, 0x30, 0x71, 378 I2C_CLIENT_END 379 }; 380 struct i2c_board_info info; 381 struct i2c_client *i2c_dev; 382 383 if (0 != btv->i2c_rc) 384 return; 385 386 memset(&info, 0, sizeof(struct i2c_board_info)); 387 memset(&btv->init_data, 0, sizeof(btv->init_data)); 388 strlcpy(info.type, "ir_video", I2C_NAME_SIZE); 389 390 switch (btv->c.type) { 391 case BTTV_BOARD_PV951: 392 btv->init_data.name = "PV951"; 393 btv->init_data.get_key = get_key_pv951; 394 btv->init_data.ir_codes = RC_MAP_PV951; 395 info.addr = 0x4b; 396 break; 397 } 398 399 if (btv->init_data.name) { 400 info.platform_data = &btv->init_data; 401 i2c_dev = i2c_new_device(&btv->c.i2c_adap, &info); 402 } else { 403 /* 404 * The external IR receiver is at i2c address 0x34 (0x35 for 405 * reads). Future Hauppauge cards will have an internal 406 * receiver at 0x30 (0x31 for reads). In theory, both can be 407 * fitted, and Hauppauge suggest an external overrides an 408 * internal. 409 * That's why we probe 0x1a (~0x34) first. CB 410 */ 411 i2c_dev = i2c_new_probed_device(&btv->c.i2c_adap, &info, addr_list, NULL); 412 } 413 if (NULL == i2c_dev) 414 return; 415 416 #if defined(CONFIG_MODULES) && defined(MODULE) 417 request_module("ir-kbd-i2c"); 418 #endif 419 } 420 421 int bttv_input_init(struct bttv *btv) 422 { 423 struct bttv_ir *ir; 424 char *ir_codes = NULL; 425 struct rc_dev *rc; 426 int err = -ENOMEM; 427 428 if (!btv->has_remote) 429 return -ENODEV; 430 431 ir = kzalloc(sizeof(*ir),GFP_KERNEL); 432 rc = rc_allocate_device(); 433 if (!ir || !rc) 434 goto err_out_free; 435 436 /* detect & configure */ 437 switch (btv->c.type) { 438 case BTTV_BOARD_AVERMEDIA: 439 case BTTV_BOARD_AVPHONE98: 440 case BTTV_BOARD_AVERMEDIA98: 441 ir_codes = RC_MAP_AVERMEDIA; 442 ir->mask_keycode = 0xf88000; 443 ir->mask_keydown = 0x010000; 444 ir->polling = 50; // ms 445 break; 446 447 case BTTV_BOARD_AVDVBT_761: 448 case BTTV_BOARD_AVDVBT_771: 449 ir_codes = RC_MAP_AVERMEDIA_DVBT; 450 ir->mask_keycode = 0x0f00c0; 451 ir->mask_keydown = 0x000020; 452 ir->polling = 50; // ms 453 break; 454 455 case BTTV_BOARD_PXELVWPLTVPAK: 456 ir_codes = RC_MAP_PIXELVIEW; 457 ir->mask_keycode = 0x003e00; 458 ir->mask_keyup = 0x010000; 459 ir->polling = 50; // ms 460 break; 461 case BTTV_BOARD_PV_M4900: 462 case BTTV_BOARD_PV_BT878P_9B: 463 case BTTV_BOARD_PV_BT878P_PLUS: 464 ir_codes = RC_MAP_PIXELVIEW; 465 ir->mask_keycode = 0x001f00; 466 ir->mask_keyup = 0x008000; 467 ir->polling = 50; // ms 468 break; 469 470 case BTTV_BOARD_WINFAST2000: 471 ir_codes = RC_MAP_WINFAST; 472 ir->mask_keycode = 0x1f8; 473 break; 474 case BTTV_BOARD_MAGICTVIEW061: 475 case BTTV_BOARD_MAGICTVIEW063: 476 ir_codes = RC_MAP_WINFAST; 477 ir->mask_keycode = 0x0008e000; 478 ir->mask_keydown = 0x00200000; 479 break; 480 case BTTV_BOARD_APAC_VIEWCOMP: 481 ir_codes = RC_MAP_APAC_VIEWCOMP; 482 ir->mask_keycode = 0x001f00; 483 ir->mask_keyup = 0x008000; 484 ir->polling = 50; // ms 485 break; 486 case BTTV_BOARD_ASKEY_CPH03X: 487 case BTTV_BOARD_CONCEPTRONIC_CTVFMI2: 488 case BTTV_BOARD_CONTVFMI: 489 case BTTV_BOARD_KWORLD_VSTREAM_XPERT: 490 ir_codes = RC_MAP_PIXELVIEW; 491 ir->mask_keycode = 0x001F00; 492 ir->mask_keyup = 0x006000; 493 ir->polling = 50; // ms 494 break; 495 case BTTV_BOARD_NEBULA_DIGITV: 496 ir_codes = RC_MAP_NEBULA; 497 ir->rc5_gpio = true; 498 break; 499 case BTTV_BOARD_MACHTV_MAGICTV: 500 ir_codes = RC_MAP_APAC_VIEWCOMP; 501 ir->mask_keycode = 0x001F00; 502 ir->mask_keyup = 0x004000; 503 ir->polling = 50; /* ms */ 504 break; 505 case BTTV_BOARD_KOZUMI_KTV_01C: 506 ir_codes = RC_MAP_PCTV_SEDNA; 507 ir->mask_keycode = 0x001f00; 508 ir->mask_keyup = 0x006000; 509 ir->polling = 50; /* ms */ 510 break; 511 case BTTV_BOARD_ENLTV_FM_2: 512 ir_codes = RC_MAP_ENCORE_ENLTV2; 513 ir->mask_keycode = 0x00fd00; 514 ir->mask_keyup = 0x000080; 515 ir->polling = 1; /* ms */ 516 ir->last_gpio = ir_extract_bits(bttv_gpio_read(&btv->c), 517 ir->mask_keycode); 518 break; 519 } 520 521 if (!ir_codes) { 522 dprintk("Ooops: IR config error [card=%d]\n", btv->c.type); 523 err = -ENODEV; 524 goto err_out_free; 525 } 526 527 if (ir->rc5_gpio) { 528 u32 gpio; 529 /* enable remote irq */ 530 bttv_gpio_inout(&btv->c, (1 << 4), 1 << 4); 531 gpio = bttv_gpio_read(&btv->c); 532 bttv_gpio_write(&btv->c, gpio & ~(1 << 4)); 533 bttv_gpio_write(&btv->c, gpio | (1 << 4)); 534 } else { 535 /* init hardware-specific stuff */ 536 bttv_gpio_inout(&btv->c, ir->mask_keycode | ir->mask_keydown, 0); 537 } 538 539 /* init input device */ 540 ir->dev = rc; 541 542 snprintf(ir->name, sizeof(ir->name), "bttv IR (card=%d)", 543 btv->c.type); 544 snprintf(ir->phys, sizeof(ir->phys), "pci-%s/ir0", 545 pci_name(btv->c.pci)); 546 547 rc->input_name = ir->name; 548 rc->input_phys = ir->phys; 549 rc->input_id.bustype = BUS_PCI; 550 rc->input_id.version = 1; 551 if (btv->c.pci->subsystem_vendor) { 552 rc->input_id.vendor = btv->c.pci->subsystem_vendor; 553 rc->input_id.product = btv->c.pci->subsystem_device; 554 } else { 555 rc->input_id.vendor = btv->c.pci->vendor; 556 rc->input_id.product = btv->c.pci->device; 557 } 558 rc->dev.parent = &btv->c.pci->dev; 559 rc->map_name = ir_codes; 560 rc->driver_name = MODULE_NAME; 561 562 btv->remote = ir; 563 bttv_ir_start(btv, ir); 564 565 /* all done */ 566 err = rc_register_device(rc); 567 if (err) 568 goto err_out_stop; 569 570 return 0; 571 572 err_out_stop: 573 bttv_ir_stop(btv); 574 btv->remote = NULL; 575 err_out_free: 576 rc_free_device(rc); 577 kfree(ir); 578 return err; 579 } 580 581 void bttv_input_fini(struct bttv *btv) 582 { 583 if (btv->remote == NULL) 584 return; 585 586 bttv_ir_stop(btv); 587 rc_unregister_device(btv->remote->dev); 588 kfree(btv->remote); 589 btv->remote = NULL; 590 } 591