1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * 4 * keyboard input driver for i2c IR remote controls 5 * 6 * Copyright (c) 2000-2003 Gerd Knorr <kraxel@bytesex.org> 7 * modified for PixelView (BT878P+W/FM) by 8 * Michal Kochanowicz <mkochano@pld.org.pl> 9 * Christoph Bartelmus <lirc@bartelmus.de> 10 * modified for KNC ONE TV Station/Anubis Typhoon TView Tuner by 11 * Ulrich Mueller <ulrich.mueller42@web.de> 12 * modified for em2820 based USB TV tuners by 13 * Markus Rechberger <mrechberger@gmail.com> 14 * modified for DViCO Fusion HDTV 5 RT GOLD by 15 * Chaogui Zhang <czhang1974@gmail.com> 16 * modified for MSI TV@nywhere Plus by 17 * Henry Wong <henry@stuffedcow.net> 18 * Mark Schultz <n9xmj@yahoo.com> 19 * Brian Rogers <brian_rogers@comcast.net> 20 * modified for AVerMedia Cardbus by 21 * Oldrich Jedlicka <oldium.pro@seznam.cz> 22 * Zilog Transmitter portions/ideas were derived from GPLv2+ sources: 23 * - drivers/char/pctv_zilogir.[ch] from Hauppauge Broadway product 24 * Copyright 2011 Hauppauge Computer works 25 * - drivers/staging/media/lirc/lirc_zilog.c 26 * Copyright (c) 2000 Gerd Knorr <kraxel@goldbach.in-berlin.de> 27 * Michal Kochanowicz <mkochano@pld.org.pl> 28 * Christoph Bartelmus <lirc@bartelmus.de> 29 * Ulrich Mueller <ulrich.mueller42@web.de> 30 * Stefan Jahn <stefan@lkcc.org> 31 * Jerome Brock <jbrock@users.sourceforge.net> 32 * Thomas Reitmayr (treitmayr@yahoo.com) 33 * Mark Weaver <mark@npsl.co.uk> 34 * Jarod Wilson <jarod@redhat.com> 35 * Copyright (C) 2011 Andy Walls <awalls@md.metrocast.net> 36 */ 37 38 #include <asm/unaligned.h> 39 #include <linux/module.h> 40 #include <linux/init.h> 41 #include <linux/kernel.h> 42 #include <linux/string.h> 43 #include <linux/timer.h> 44 #include <linux/delay.h> 45 #include <linux/errno.h> 46 #include <linux/slab.h> 47 #include <linux/i2c.h> 48 #include <linux/workqueue.h> 49 50 #include <media/rc-core.h> 51 #include <media/i2c/ir-kbd-i2c.h> 52 53 #define FLAG_TX 1 54 #define FLAG_HDPVR 2 55 56 static bool enable_hdpvr; 57 module_param(enable_hdpvr, bool, 0644); 58 59 static int get_key_haup_common(struct IR_i2c *ir, enum rc_proto *protocol, 60 u32 *scancode, u8 *ptoggle, int size) 61 { 62 unsigned char buf[6]; 63 int start, range, toggle, dev, code, ircode, vendor; 64 65 /* poll IR chip */ 66 if (size != i2c_master_recv(ir->c, buf, size)) 67 return -EIO; 68 69 if (buf[0] & 0x80) { 70 int offset = (size == 6) ? 3 : 0; 71 72 /* split rc5 data block ... */ 73 start = (buf[offset] >> 7) & 1; 74 range = (buf[offset] >> 6) & 1; 75 toggle = (buf[offset] >> 5) & 1; 76 dev = buf[offset] & 0x1f; 77 code = (buf[offset+1] >> 2) & 0x3f; 78 79 /* rc5 has two start bits 80 * the first bit must be one 81 * the second bit defines the command range: 82 * 1 = 0-63, 0 = 64 - 127 83 */ 84 if (!start) 85 /* no key pressed */ 86 return 0; 87 88 /* filter out invalid key presses */ 89 ircode = (start << 12) | (toggle << 11) | (dev << 6) | code; 90 if ((ircode & 0x1fff) == 0x1fff) 91 return 0; 92 93 if (!range) 94 code += 64; 95 96 dev_dbg(&ir->rc->dev, 97 "ir hauppauge (rc5): s%d r%d t%d dev=%d code=%d\n", 98 start, range, toggle, dev, code); 99 100 *protocol = RC_PROTO_RC5; 101 *scancode = RC_SCANCODE_RC5(dev, code); 102 *ptoggle = toggle; 103 104 return 1; 105 } else if (size == 6 && (buf[0] & 0x40)) { 106 code = buf[4]; 107 dev = buf[3]; 108 vendor = get_unaligned_be16(buf + 1); 109 110 if (vendor == 0x800f) { 111 *ptoggle = (dev & 0x80) != 0; 112 *protocol = RC_PROTO_RC6_MCE; 113 dev &= 0x7f; 114 dev_dbg(&ir->rc->dev, 115 "ir hauppauge (rc6-mce): t%d vendor=%d dev=%d code=%d\n", 116 *ptoggle, vendor, dev, code); 117 } else { 118 *ptoggle = 0; 119 *protocol = RC_PROTO_RC6_6A_32; 120 dev_dbg(&ir->rc->dev, 121 "ir hauppauge (rc6-6a-32): vendor=%d dev=%d code=%d\n", 122 vendor, dev, code); 123 } 124 125 *scancode = RC_SCANCODE_RC6_6A(vendor, dev, code); 126 127 return 1; 128 } 129 130 return 0; 131 } 132 133 static int get_key_haup(struct IR_i2c *ir, enum rc_proto *protocol, 134 u32 *scancode, u8 *toggle) 135 { 136 return get_key_haup_common(ir, protocol, scancode, toggle, 3); 137 } 138 139 static int get_key_haup_xvr(struct IR_i2c *ir, enum rc_proto *protocol, 140 u32 *scancode, u8 *toggle) 141 { 142 int ret; 143 unsigned char buf[1] = { 0 }; 144 145 /* 146 * This is the same apparent "are you ready?" poll command observed 147 * watching Windows driver traffic and implemented in lirc_zilog. With 148 * this added, we get far saner remote behavior with z8 chips on usb 149 * connected devices, even with the default polling interval of 100ms. 150 */ 151 ret = i2c_master_send(ir->c, buf, 1); 152 if (ret != 1) 153 return (ret < 0) ? ret : -EINVAL; 154 155 return get_key_haup_common(ir, protocol, scancode, toggle, 6); 156 } 157 158 static int get_key_pixelview(struct IR_i2c *ir, enum rc_proto *protocol, 159 u32 *scancode, u8 *toggle) 160 { 161 int rc; 162 unsigned char b; 163 164 /* poll IR chip */ 165 rc = i2c_master_recv(ir->c, &b, 1); 166 if (rc != 1) { 167 dev_dbg(&ir->rc->dev, "read error\n"); 168 if (rc < 0) 169 return rc; 170 return -EIO; 171 } 172 173 *protocol = RC_PROTO_OTHER; 174 *scancode = b; 175 *toggle = 0; 176 return 1; 177 } 178 179 static int get_key_fusionhdtv(struct IR_i2c *ir, enum rc_proto *protocol, 180 u32 *scancode, u8 *toggle) 181 { 182 int rc; 183 unsigned char buf[4]; 184 185 /* poll IR chip */ 186 rc = i2c_master_recv(ir->c, buf, 4); 187 if (rc != 4) { 188 dev_dbg(&ir->rc->dev, "read error\n"); 189 if (rc < 0) 190 return rc; 191 return -EIO; 192 } 193 194 if (buf[0] != 0 || buf[1] != 0 || buf[2] != 0 || buf[3] != 0) 195 dev_dbg(&ir->rc->dev, "%s: %*ph\n", __func__, 4, buf); 196 197 /* no key pressed or signal from other ir remote */ 198 if(buf[0] != 0x1 || buf[1] != 0xfe) 199 return 0; 200 201 *protocol = RC_PROTO_UNKNOWN; 202 *scancode = buf[2]; 203 *toggle = 0; 204 return 1; 205 } 206 207 static int get_key_knc1(struct IR_i2c *ir, enum rc_proto *protocol, 208 u32 *scancode, u8 *toggle) 209 { 210 int rc; 211 unsigned char b; 212 213 /* poll IR chip */ 214 rc = i2c_master_recv(ir->c, &b, 1); 215 if (rc != 1) { 216 dev_dbg(&ir->rc->dev, "read error\n"); 217 if (rc < 0) 218 return rc; 219 return -EIO; 220 } 221 222 /* it seems that 0xFE indicates that a button is still hold 223 down, while 0xff indicates that no button is hold 224 down. 0xfe sequences are sometimes interrupted by 0xFF */ 225 226 dev_dbg(&ir->rc->dev, "key %02x\n", b); 227 228 if (b == 0xff) 229 return 0; 230 231 if (b == 0xfe) 232 /* keep old data */ 233 return 1; 234 235 *protocol = RC_PROTO_UNKNOWN; 236 *scancode = b; 237 *toggle = 0; 238 return 1; 239 } 240 241 static int get_key_avermedia_cardbus(struct IR_i2c *ir, enum rc_proto *protocol, 242 u32 *scancode, u8 *toggle) 243 { 244 unsigned char subaddr, key, keygroup; 245 struct i2c_msg msg[] = { { .addr = ir->c->addr, .flags = 0, 246 .buf = &subaddr, .len = 1}, 247 { .addr = ir->c->addr, .flags = I2C_M_RD, 248 .buf = &key, .len = 1} }; 249 subaddr = 0x0d; 250 if (2 != i2c_transfer(ir->c->adapter, msg, 2)) { 251 dev_dbg(&ir->rc->dev, "read error\n"); 252 return -EIO; 253 } 254 255 if (key == 0xff) 256 return 0; 257 258 subaddr = 0x0b; 259 msg[1].buf = &keygroup; 260 if (2 != i2c_transfer(ir->c->adapter, msg, 2)) { 261 dev_dbg(&ir->rc->dev, "read error\n"); 262 return -EIO; 263 } 264 265 if (keygroup == 0xff) 266 return 0; 267 268 dev_dbg(&ir->rc->dev, "read key 0x%02x/0x%02x\n", key, keygroup); 269 if (keygroup < 2 || keygroup > 4) { 270 dev_warn(&ir->rc->dev, "warning: invalid key group 0x%02x for key 0x%02x\n", 271 keygroup, key); 272 } 273 key |= (keygroup & 1) << 6; 274 275 *protocol = RC_PROTO_UNKNOWN; 276 *scancode = key; 277 if (ir->c->addr == 0x41) /* AVerMedia EM78P153 */ 278 *scancode |= keygroup << 8; 279 *toggle = 0; 280 return 1; 281 } 282 283 /* ----------------------------------------------------------------------- */ 284 285 static int ir_key_poll(struct IR_i2c *ir) 286 { 287 enum rc_proto protocol; 288 u32 scancode; 289 u8 toggle; 290 int rc; 291 292 dev_dbg(&ir->rc->dev, "%s\n", __func__); 293 rc = ir->get_key(ir, &protocol, &scancode, &toggle); 294 if (rc < 0) { 295 dev_warn(&ir->rc->dev, "error %d\n", rc); 296 return rc; 297 } 298 299 if (rc) { 300 dev_dbg(&ir->rc->dev, "%s: proto = 0x%04x, scancode = 0x%08x\n", 301 __func__, protocol, scancode); 302 rc_keydown(ir->rc, protocol, scancode, toggle); 303 } 304 return 0; 305 } 306 307 static void ir_work(struct work_struct *work) 308 { 309 int rc; 310 struct IR_i2c *ir = container_of(work, struct IR_i2c, work.work); 311 312 /* 313 * If the transmit code is holding the lock, skip polling for 314 * IR, we'll get it to it next time round 315 */ 316 if (mutex_trylock(&ir->lock)) { 317 rc = ir_key_poll(ir); 318 mutex_unlock(&ir->lock); 319 if (rc == -ENODEV) { 320 rc_unregister_device(ir->rc); 321 ir->rc = NULL; 322 return; 323 } 324 } 325 326 schedule_delayed_work(&ir->work, msecs_to_jiffies(ir->polling_interval)); 327 } 328 329 static int ir_open(struct rc_dev *dev) 330 { 331 struct IR_i2c *ir = dev->priv; 332 333 schedule_delayed_work(&ir->work, 0); 334 335 return 0; 336 } 337 338 static void ir_close(struct rc_dev *dev) 339 { 340 struct IR_i2c *ir = dev->priv; 341 342 cancel_delayed_work_sync(&ir->work); 343 } 344 345 /* Zilog Transmit Interface */ 346 #define XTAL_FREQ 18432000 347 348 #define ZILOG_SEND 0x80 349 #define ZILOG_UIR_END 0x40 350 #define ZILOG_INIT_END 0x20 351 #define ZILOG_LIR_END 0x10 352 353 #define ZILOG_STATUS_OK 0x80 354 #define ZILOG_STATUS_TX 0x40 355 #define ZILOG_STATUS_SET 0x20 356 357 /* 358 * As you can see here, very few different lengths of pulse and space 359 * can be encoded. This means that the hardware does not work well with 360 * recorded IR. It's best to work with generated IR, like from ir-ctl or 361 * the in-kernel encoders. 362 */ 363 struct code_block { 364 u8 length; 365 u16 pulse[7]; /* not aligned */ 366 u8 carrier_pulse; 367 u8 carrier_space; 368 u16 space[8]; /* not aligned */ 369 u8 codes[61]; 370 u8 csum[2]; 371 } __packed; 372 373 static int send_data_block(struct IR_i2c *ir, int cmd, 374 struct code_block *code_block) 375 { 376 int i, j, ret; 377 u8 buf[5], *p; 378 379 p = &code_block->length; 380 for (i = 0; p < code_block->csum; i++) 381 code_block->csum[i & 1] ^= *p++; 382 383 p = &code_block->length; 384 385 for (i = 0; i < sizeof(*code_block);) { 386 int tosend = sizeof(*code_block) - i; 387 388 if (tosend > 4) 389 tosend = 4; 390 buf[0] = i + 1; 391 for (j = 0; j < tosend; ++j) 392 buf[1 + j] = p[i + j]; 393 dev_dbg(&ir->rc->dev, "%*ph", tosend + 1, buf); 394 ret = i2c_master_send(ir->tx_c, buf, tosend + 1); 395 if (ret != tosend + 1) { 396 dev_dbg(&ir->rc->dev, 397 "i2c_master_send failed with %d\n", ret); 398 return ret < 0 ? ret : -EIO; 399 } 400 i += tosend; 401 } 402 403 buf[0] = 0; 404 buf[1] = cmd; 405 ret = i2c_master_send(ir->tx_c, buf, 2); 406 if (ret != 2) { 407 dev_err(&ir->rc->dev, "i2c_master_send failed with %d\n", ret); 408 return ret < 0 ? ret : -EIO; 409 } 410 411 usleep_range(2000, 5000); 412 413 ret = i2c_master_send(ir->tx_c, buf, 1); 414 if (ret != 1) { 415 dev_err(&ir->rc->dev, "i2c_master_send failed with %d\n", ret); 416 return ret < 0 ? ret : -EIO; 417 } 418 419 return 0; 420 } 421 422 static int zilog_init(struct IR_i2c *ir) 423 { 424 struct code_block code_block = { .length = sizeof(code_block) }; 425 u8 buf[4]; 426 int ret; 427 428 put_unaligned_be16(0x1000, &code_block.pulse[3]); 429 430 ret = send_data_block(ir, ZILOG_INIT_END, &code_block); 431 if (ret) 432 return ret; 433 434 ret = i2c_master_recv(ir->tx_c, buf, 4); 435 if (ret != 4) { 436 dev_err(&ir->c->dev, "failed to retrieve firmware version: %d\n", 437 ret); 438 return ret < 0 ? ret : -EIO; 439 } 440 441 dev_info(&ir->c->dev, "Zilog/Hauppauge IR blaster firmware version %d.%d.%d\n", 442 buf[1], buf[2], buf[3]); 443 444 return 0; 445 } 446 447 /* 448 * If the last slot for pulse is the same as the current slot for pulse, 449 * then use slot no 7. 450 */ 451 static void copy_codes(u8 *dst, u8 *src, unsigned int count) 452 { 453 u8 c, last = 0xff; 454 455 while (count--) { 456 c = *src++; 457 if ((c & 0xf0) == last) { 458 *dst++ = 0x70 | (c & 0xf); 459 } else { 460 *dst++ = c; 461 last = c & 0xf0; 462 } 463 } 464 } 465 466 /* 467 * When looking for repeats, we don't care about the trailing space. This 468 * is set to the shortest possible anyway. 469 */ 470 static int cmp_no_trail(u8 *a, u8 *b, unsigned int count) 471 { 472 while (--count) { 473 if (*a++ != *b++) 474 return 1; 475 } 476 477 return (*a & 0xf0) - (*b & 0xf0); 478 } 479 480 static int find_slot(u16 *array, unsigned int size, u16 val) 481 { 482 int i; 483 484 for (i = 0; i < size; i++) { 485 if (get_unaligned_be16(&array[i]) == val) { 486 return i; 487 } else if (!array[i]) { 488 put_unaligned_be16(val, &array[i]); 489 return i; 490 } 491 } 492 493 return -1; 494 } 495 496 static int zilog_ir_format(struct rc_dev *rcdev, unsigned int *txbuf, 497 unsigned int count, struct code_block *code_block) 498 { 499 struct IR_i2c *ir = rcdev->priv; 500 int rep, i, l, p = 0, s, c = 0; 501 bool repeating; 502 u8 codes[174]; 503 504 code_block->carrier_pulse = DIV_ROUND_CLOSEST( 505 ir->duty_cycle * XTAL_FREQ / 1000, ir->carrier); 506 code_block->carrier_space = DIV_ROUND_CLOSEST( 507 (100 - ir->duty_cycle) * XTAL_FREQ / 1000, ir->carrier); 508 509 for (i = 0; i < count; i++) { 510 if (c >= ARRAY_SIZE(codes) - 1) { 511 dev_warn(&rcdev->dev, "IR too long, cannot transmit\n"); 512 return -EINVAL; 513 } 514 515 /* 516 * Lengths more than 142220us cannot be encoded; also 517 * this checks for multiply overflow 518 */ 519 if (txbuf[i] > 142220) 520 return -EINVAL; 521 522 l = DIV_ROUND_CLOSEST((XTAL_FREQ / 1000) * txbuf[i], 40000); 523 524 if (i & 1) { 525 s = find_slot(code_block->space, 526 ARRAY_SIZE(code_block->space), l); 527 if (s == -1) { 528 dev_warn(&rcdev->dev, "Too many different lengths spaces, cannot transmit"); 529 return -EINVAL; 530 } 531 532 /* We have a pulse and space */ 533 codes[c++] = (p << 4) | s; 534 } else { 535 p = find_slot(code_block->pulse, 536 ARRAY_SIZE(code_block->pulse), l); 537 if (p == -1) { 538 dev_warn(&rcdev->dev, "Too many different lengths pulses, cannot transmit"); 539 return -EINVAL; 540 } 541 } 542 } 543 544 /* We have to encode the trailing pulse. Find the shortest space */ 545 s = 0; 546 for (i = 1; i < ARRAY_SIZE(code_block->space); i++) { 547 u16 d = get_unaligned_be16(&code_block->space[i]); 548 549 if (get_unaligned_be16(&code_block->space[s]) > d) 550 s = i; 551 } 552 553 codes[c++] = (p << 4) | s; 554 555 dev_dbg(&rcdev->dev, "generated %d codes\n", c); 556 557 /* 558 * Are the last N codes (so pulse + space) repeating 3 times? 559 * if so we can shorten the codes list and use code 0xc0 to repeat 560 * them. 561 */ 562 repeating = false; 563 564 for (rep = c / 3; rep >= 1; rep--) { 565 if (!memcmp(&codes[c - rep * 3], &codes[c - rep * 2], rep) && 566 !cmp_no_trail(&codes[c - rep], &codes[c - rep * 2], rep)) { 567 repeating = true; 568 break; 569 } 570 } 571 572 if (repeating) { 573 /* first copy any leading non-repeating */ 574 int leading = c - rep * 3; 575 576 if (leading >= ARRAY_SIZE(code_block->codes) - 3 - rep) { 577 dev_warn(&rcdev->dev, "IR too long, cannot transmit\n"); 578 return -EINVAL; 579 } 580 581 dev_dbg(&rcdev->dev, "found trailing %d repeat\n", rep); 582 copy_codes(code_block->codes, codes, leading); 583 code_block->codes[leading] = 0x82; 584 copy_codes(code_block->codes + leading + 1, codes + leading, 585 rep); 586 c = leading + 1 + rep; 587 code_block->codes[c++] = 0xc0; 588 } else { 589 if (c >= ARRAY_SIZE(code_block->codes) - 3) { 590 dev_warn(&rcdev->dev, "IR too long, cannot transmit\n"); 591 return -EINVAL; 592 } 593 594 dev_dbg(&rcdev->dev, "found no trailing repeat\n"); 595 code_block->codes[0] = 0x82; 596 copy_codes(code_block->codes + 1, codes, c); 597 c++; 598 code_block->codes[c++] = 0xc4; 599 } 600 601 while (c < ARRAY_SIZE(code_block->codes)) 602 code_block->codes[c++] = 0x83; 603 604 return 0; 605 } 606 607 static int zilog_tx(struct rc_dev *rcdev, unsigned int *txbuf, 608 unsigned int count) 609 { 610 struct IR_i2c *ir = rcdev->priv; 611 struct code_block code_block = { .length = sizeof(code_block) }; 612 u8 buf[2]; 613 int ret, i; 614 615 ret = zilog_ir_format(rcdev, txbuf, count, &code_block); 616 if (ret) 617 return ret; 618 619 ret = mutex_lock_interruptible(&ir->lock); 620 if (ret) 621 return ret; 622 623 ret = send_data_block(ir, ZILOG_UIR_END, &code_block); 624 if (ret) 625 goto out_unlock; 626 627 ret = i2c_master_recv(ir->tx_c, buf, 1); 628 if (ret != 1) { 629 dev_err(&ir->rc->dev, "i2c_master_recv failed with %d\n", ret); 630 goto out_unlock; 631 } 632 633 dev_dbg(&ir->rc->dev, "code set status: %02x\n", buf[0]); 634 635 if (buf[0] != (ZILOG_STATUS_OK | ZILOG_STATUS_SET)) { 636 dev_err(&ir->rc->dev, "unexpected IR TX response %02x\n", 637 buf[0]); 638 ret = -EIO; 639 goto out_unlock; 640 } 641 642 buf[0] = 0x00; 643 buf[1] = ZILOG_SEND; 644 645 ret = i2c_master_send(ir->tx_c, buf, 2); 646 if (ret != 2) { 647 dev_err(&ir->rc->dev, "i2c_master_send failed with %d\n", ret); 648 if (ret >= 0) 649 ret = -EIO; 650 goto out_unlock; 651 } 652 653 dev_dbg(&ir->rc->dev, "send command sent\n"); 654 655 /* 656 * This bit NAKs until the device is ready, so we retry it 657 * sleeping a bit each time. This seems to be what the windows 658 * driver does, approximately. 659 * Try for up to 1s. 660 */ 661 for (i = 0; i < 20; ++i) { 662 set_current_state(TASK_UNINTERRUPTIBLE); 663 schedule_timeout(msecs_to_jiffies(50)); 664 ret = i2c_master_send(ir->tx_c, buf, 1); 665 if (ret == 1) 666 break; 667 dev_dbg(&ir->rc->dev, 668 "NAK expected: i2c_master_send failed with %d (try %d)\n", 669 ret, i + 1); 670 } 671 672 if (ret != 1) { 673 dev_err(&ir->rc->dev, 674 "IR TX chip never got ready: last i2c_master_send failed with %d\n", 675 ret); 676 if (ret >= 0) 677 ret = -EIO; 678 goto out_unlock; 679 } 680 681 i = i2c_master_recv(ir->tx_c, buf, 1); 682 if (i != 1) { 683 dev_err(&ir->rc->dev, "i2c_master_recv failed with %d\n", ret); 684 ret = -EIO; 685 goto out_unlock; 686 } else if (buf[0] != ZILOG_STATUS_OK) { 687 dev_err(&ir->rc->dev, "unexpected IR TX response #2: %02x\n", 688 buf[0]); 689 ret = -EIO; 690 goto out_unlock; 691 } 692 dev_dbg(&ir->rc->dev, "transmit complete\n"); 693 694 /* Oh good, it worked */ 695 ret = count; 696 out_unlock: 697 mutex_unlock(&ir->lock); 698 699 return ret; 700 } 701 702 static int zilog_tx_carrier(struct rc_dev *dev, u32 carrier) 703 { 704 struct IR_i2c *ir = dev->priv; 705 706 if (carrier > 500000 || carrier < 20000) 707 return -EINVAL; 708 709 ir->carrier = carrier; 710 711 return 0; 712 } 713 714 static int zilog_tx_duty_cycle(struct rc_dev *dev, u32 duty_cycle) 715 { 716 struct IR_i2c *ir = dev->priv; 717 718 ir->duty_cycle = duty_cycle; 719 720 return 0; 721 } 722 723 static int ir_probe(struct i2c_client *client, const struct i2c_device_id *id) 724 { 725 char *ir_codes = NULL; 726 const char *name = NULL; 727 u64 rc_proto = RC_PROTO_BIT_UNKNOWN; 728 struct IR_i2c *ir; 729 struct rc_dev *rc = NULL; 730 struct i2c_adapter *adap = client->adapter; 731 unsigned short addr = client->addr; 732 bool probe_tx = (id->driver_data & FLAG_TX) != 0; 733 int err; 734 735 if ((id->driver_data & FLAG_HDPVR) && !enable_hdpvr) { 736 dev_err(&client->dev, "IR for HDPVR is known to cause problems during recording, use enable_hdpvr modparam to enable\n"); 737 return -ENODEV; 738 } 739 740 ir = devm_kzalloc(&client->dev, sizeof(*ir), GFP_KERNEL); 741 if (!ir) 742 return -ENOMEM; 743 744 ir->c = client; 745 ir->polling_interval = DEFAULT_POLLING_INTERVAL; 746 i2c_set_clientdata(client, ir); 747 748 switch(addr) { 749 case 0x64: 750 name = "Pixelview"; 751 ir->get_key = get_key_pixelview; 752 rc_proto = RC_PROTO_BIT_OTHER; 753 ir_codes = RC_MAP_EMPTY; 754 break; 755 case 0x18: 756 case 0x1f: 757 case 0x1a: 758 name = "Hauppauge"; 759 ir->get_key = get_key_haup; 760 rc_proto = RC_PROTO_BIT_RC5; 761 ir_codes = RC_MAP_HAUPPAUGE; 762 break; 763 case 0x30: 764 name = "KNC One"; 765 ir->get_key = get_key_knc1; 766 rc_proto = RC_PROTO_BIT_OTHER; 767 ir_codes = RC_MAP_EMPTY; 768 break; 769 case 0x6b: 770 name = "FusionHDTV"; 771 ir->get_key = get_key_fusionhdtv; 772 rc_proto = RC_PROTO_BIT_UNKNOWN; 773 ir_codes = RC_MAP_FUSIONHDTV_MCE; 774 break; 775 case 0x40: 776 name = "AVerMedia Cardbus remote"; 777 ir->get_key = get_key_avermedia_cardbus; 778 rc_proto = RC_PROTO_BIT_OTHER; 779 ir_codes = RC_MAP_AVERMEDIA_CARDBUS; 780 break; 781 case 0x41: 782 name = "AVerMedia EM78P153"; 783 ir->get_key = get_key_avermedia_cardbus; 784 rc_proto = RC_PROTO_BIT_OTHER; 785 /* RM-KV remote, seems to be same as RM-K6 */ 786 ir_codes = RC_MAP_AVERMEDIA_M733A_RM_K6; 787 break; 788 case 0x71: 789 name = "Hauppauge/Zilog Z8"; 790 ir->get_key = get_key_haup_xvr; 791 rc_proto = RC_PROTO_BIT_RC5 | RC_PROTO_BIT_RC6_MCE | 792 RC_PROTO_BIT_RC6_6A_32; 793 ir_codes = RC_MAP_HAUPPAUGE; 794 probe_tx = true; 795 break; 796 } 797 798 /* Let the caller override settings */ 799 if (client->dev.platform_data) { 800 const struct IR_i2c_init_data *init_data = 801 client->dev.platform_data; 802 803 ir_codes = init_data->ir_codes; 804 rc = init_data->rc_dev; 805 806 name = init_data->name; 807 if (init_data->type) 808 rc_proto = init_data->type; 809 810 if (init_data->polling_interval) 811 ir->polling_interval = init_data->polling_interval; 812 813 switch (init_data->internal_get_key_func) { 814 case IR_KBD_GET_KEY_CUSTOM: 815 /* The bridge driver provided us its own function */ 816 ir->get_key = init_data->get_key; 817 break; 818 case IR_KBD_GET_KEY_PIXELVIEW: 819 ir->get_key = get_key_pixelview; 820 break; 821 case IR_KBD_GET_KEY_HAUP: 822 ir->get_key = get_key_haup; 823 break; 824 case IR_KBD_GET_KEY_KNC1: 825 ir->get_key = get_key_knc1; 826 break; 827 case IR_KBD_GET_KEY_FUSIONHDTV: 828 ir->get_key = get_key_fusionhdtv; 829 break; 830 case IR_KBD_GET_KEY_HAUP_XVR: 831 ir->get_key = get_key_haup_xvr; 832 break; 833 case IR_KBD_GET_KEY_AVERMEDIA_CARDBUS: 834 ir->get_key = get_key_avermedia_cardbus; 835 break; 836 } 837 } 838 839 if (!rc) { 840 /* 841 * If platform_data doesn't specify rc_dev, initialize it 842 * internally 843 */ 844 rc = rc_allocate_device(RC_DRIVER_SCANCODE); 845 if (!rc) 846 return -ENOMEM; 847 } 848 ir->rc = rc; 849 850 /* Make sure we are all setup before going on */ 851 if (!name || !ir->get_key || !rc_proto || !ir_codes) { 852 dev_warn(&client->dev, "Unsupported device at address 0x%02x\n", 853 addr); 854 err = -ENODEV; 855 goto err_out_free; 856 } 857 858 ir->ir_codes = ir_codes; 859 860 snprintf(ir->phys, sizeof(ir->phys), "%s/%s", dev_name(&adap->dev), 861 dev_name(&client->dev)); 862 863 /* 864 * Initialize input_dev fields 865 * It doesn't make sense to allow overriding them via platform_data 866 */ 867 rc->input_id.bustype = BUS_I2C; 868 rc->input_phys = ir->phys; 869 rc->device_name = name; 870 rc->dev.parent = &client->dev; 871 rc->priv = ir; 872 rc->open = ir_open; 873 rc->close = ir_close; 874 875 /* 876 * Initialize the other fields of rc_dev 877 */ 878 rc->map_name = ir->ir_codes; 879 rc->allowed_protocols = rc_proto; 880 if (!rc->driver_name) 881 rc->driver_name = KBUILD_MODNAME; 882 883 mutex_init(&ir->lock); 884 885 INIT_DELAYED_WORK(&ir->work, ir_work); 886 887 if (probe_tx) { 888 ir->tx_c = i2c_new_dummy(client->adapter, 0x70); 889 if (!ir->tx_c) { 890 dev_err(&client->dev, "failed to setup tx i2c address"); 891 } else if (!zilog_init(ir)) { 892 ir->carrier = 38000; 893 ir->duty_cycle = 40; 894 rc->tx_ir = zilog_tx; 895 rc->s_tx_carrier = zilog_tx_carrier; 896 rc->s_tx_duty_cycle = zilog_tx_duty_cycle; 897 } 898 } 899 900 err = rc_register_device(rc); 901 if (err) 902 goto err_out_free; 903 904 return 0; 905 906 err_out_free: 907 if (ir->tx_c) 908 i2c_unregister_device(ir->tx_c); 909 910 /* Only frees rc if it were allocated internally */ 911 rc_free_device(rc); 912 return err; 913 } 914 915 static int ir_remove(struct i2c_client *client) 916 { 917 struct IR_i2c *ir = i2c_get_clientdata(client); 918 919 /* kill outstanding polls */ 920 cancel_delayed_work_sync(&ir->work); 921 922 if (ir->tx_c) 923 i2c_unregister_device(ir->tx_c); 924 925 /* unregister device */ 926 rc_unregister_device(ir->rc); 927 928 /* free memory */ 929 return 0; 930 } 931 932 static const struct i2c_device_id ir_kbd_id[] = { 933 /* Generic entry for any IR receiver */ 934 { "ir_video", 0 }, 935 /* IR device specific entries should be added here */ 936 { "ir_z8f0811_haup", FLAG_TX }, 937 { "ir_z8f0811_hdpvr", FLAG_TX | FLAG_HDPVR }, 938 { } 939 }; 940 MODULE_DEVICE_TABLE(i2c, ir_kbd_id); 941 942 static struct i2c_driver ir_kbd_driver = { 943 .driver = { 944 .name = "ir-kbd-i2c", 945 }, 946 .probe = ir_probe, 947 .remove = ir_remove, 948 .id_table = ir_kbd_id, 949 }; 950 951 module_i2c_driver(ir_kbd_driver); 952 953 /* ----------------------------------------------------------------------- */ 954 955 MODULE_AUTHOR("Gerd Knorr, Michal Kochanowicz, Christoph Bartelmus, Ulrich Mueller"); 956 MODULE_DESCRIPTION("input driver for i2c IR remote controls"); 957 MODULE_LICENSE("GPL"); 958