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 <linux/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 get_key_haup_common(struct IR_i2c * ir,enum rc_proto * protocol,u32 * scancode,u8 * ptoggle,int size)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 get_key_haup(struct IR_i2c * ir,enum rc_proto * protocol,u32 * scancode,u8 * toggle)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 get_key_haup_xvr(struct IR_i2c * ir,enum rc_proto * protocol,u32 * scancode,u8 * toggle)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 get_key_pixelview(struct IR_i2c * ir,enum rc_proto * protocol,u32 * scancode,u8 * toggle)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 get_key_fusionhdtv(struct IR_i2c * ir,enum rc_proto * protocol,u32 * scancode,u8 * toggle)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 get_key_knc1(struct IR_i2c * ir,enum rc_proto * protocol,u32 * scancode,u8 * toggle)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 get_key_geniatech(struct IR_i2c * ir,enum rc_proto * protocol,u32 * scancode,u8 * toggle)241 static int get_key_geniatech(struct IR_i2c *ir, enum rc_proto *protocol, 242 u32 *scancode, u8 *toggle) 243 { 244 int i, rc; 245 unsigned char b; 246 247 /* poll IR chip */ 248 for (i = 0; i < 4; i++) { 249 rc = i2c_master_recv(ir->c, &b, 1); 250 if (rc == 1) 251 break; 252 msleep(20); 253 } 254 if (rc != 1) { 255 dev_dbg(&ir->rc->dev, "read error\n"); 256 if (rc < 0) 257 return rc; 258 return -EIO; 259 } 260 261 /* don't repeat the key */ 262 if (ir->old == b) 263 return 0; 264 ir->old = b; 265 266 /* decode to RC5 */ 267 b &= 0x7f; 268 b = (b - 1) / 2; 269 270 dev_dbg(&ir->rc->dev, "key %02x\n", b); 271 272 *protocol = RC_PROTO_RC5; 273 *scancode = b; 274 *toggle = ir->old >> 7; 275 return 1; 276 } 277 get_key_avermedia_cardbus(struct IR_i2c * ir,enum rc_proto * protocol,u32 * scancode,u8 * toggle)278 static int get_key_avermedia_cardbus(struct IR_i2c *ir, enum rc_proto *protocol, 279 u32 *scancode, u8 *toggle) 280 { 281 unsigned char subaddr, key, keygroup; 282 struct i2c_msg msg[] = { { .addr = ir->c->addr, .flags = 0, 283 .buf = &subaddr, .len = 1}, 284 { .addr = ir->c->addr, .flags = I2C_M_RD, 285 .buf = &key, .len = 1} }; 286 subaddr = 0x0d; 287 if (2 != i2c_transfer(ir->c->adapter, msg, 2)) { 288 dev_dbg(&ir->rc->dev, "read error\n"); 289 return -EIO; 290 } 291 292 if (key == 0xff) 293 return 0; 294 295 subaddr = 0x0b; 296 msg[1].buf = &keygroup; 297 if (2 != i2c_transfer(ir->c->adapter, msg, 2)) { 298 dev_dbg(&ir->rc->dev, "read error\n"); 299 return -EIO; 300 } 301 302 if (keygroup == 0xff) 303 return 0; 304 305 dev_dbg(&ir->rc->dev, "read key 0x%02x/0x%02x\n", key, keygroup); 306 if (keygroup < 2 || keygroup > 4) { 307 dev_warn(&ir->rc->dev, "warning: invalid key group 0x%02x for key 0x%02x\n", 308 keygroup, key); 309 } 310 key |= (keygroup & 1) << 6; 311 312 *protocol = RC_PROTO_UNKNOWN; 313 *scancode = key; 314 if (ir->c->addr == 0x41) /* AVerMedia EM78P153 */ 315 *scancode |= keygroup << 8; 316 *toggle = 0; 317 return 1; 318 } 319 320 /* ----------------------------------------------------------------------- */ 321 ir_key_poll(struct IR_i2c * ir)322 static int ir_key_poll(struct IR_i2c *ir) 323 { 324 enum rc_proto protocol; 325 u32 scancode; 326 u8 toggle; 327 int rc; 328 329 dev_dbg(&ir->rc->dev, "%s\n", __func__); 330 rc = ir->get_key(ir, &protocol, &scancode, &toggle); 331 if (rc < 0) { 332 dev_warn(&ir->rc->dev, "error %d\n", rc); 333 return rc; 334 } 335 336 if (rc) { 337 dev_dbg(&ir->rc->dev, "%s: proto = 0x%04x, scancode = 0x%08x\n", 338 __func__, protocol, scancode); 339 rc_keydown(ir->rc, protocol, scancode, toggle); 340 } 341 return 0; 342 } 343 ir_work(struct work_struct * work)344 static void ir_work(struct work_struct *work) 345 { 346 int rc; 347 struct IR_i2c *ir = container_of(work, struct IR_i2c, work.work); 348 349 /* 350 * If the transmit code is holding the lock, skip polling for 351 * IR, we'll get it to it next time round 352 */ 353 if (mutex_trylock(&ir->lock)) { 354 rc = ir_key_poll(ir); 355 mutex_unlock(&ir->lock); 356 if (rc == -ENODEV) { 357 rc_unregister_device(ir->rc); 358 ir->rc = NULL; 359 return; 360 } 361 } 362 363 schedule_delayed_work(&ir->work, msecs_to_jiffies(ir->polling_interval)); 364 } 365 ir_open(struct rc_dev * dev)366 static int ir_open(struct rc_dev *dev) 367 { 368 struct IR_i2c *ir = dev->priv; 369 370 schedule_delayed_work(&ir->work, 0); 371 372 return 0; 373 } 374 ir_close(struct rc_dev * dev)375 static void ir_close(struct rc_dev *dev) 376 { 377 struct IR_i2c *ir = dev->priv; 378 379 cancel_delayed_work_sync(&ir->work); 380 } 381 382 /* Zilog Transmit Interface */ 383 #define XTAL_FREQ 18432000 384 385 #define ZILOG_SEND 0x80 386 #define ZILOG_UIR_END 0x40 387 #define ZILOG_INIT_END 0x20 388 #define ZILOG_LIR_END 0x10 389 390 #define ZILOG_STATUS_OK 0x80 391 #define ZILOG_STATUS_TX 0x40 392 #define ZILOG_STATUS_SET 0x20 393 394 /* 395 * As you can see here, very few different lengths of pulse and space 396 * can be encoded. This means that the hardware does not work well with 397 * recorded IR. It's best to work with generated IR, like from ir-ctl or 398 * the in-kernel encoders. 399 */ 400 struct code_block { 401 u8 length; 402 u16 pulse[7]; /* not aligned */ 403 u8 carrier_pulse; 404 u8 carrier_space; 405 u16 space[8]; /* not aligned */ 406 u8 codes[61]; 407 u8 csum[2]; 408 } __packed; 409 send_data_block(struct IR_i2c * ir,int cmd,struct code_block * code_block)410 static int send_data_block(struct IR_i2c *ir, int cmd, 411 struct code_block *code_block) 412 { 413 int i, j, ret; 414 u8 buf[5], *p; 415 416 p = &code_block->length; 417 for (i = 0; p < code_block->csum; i++) 418 code_block->csum[i & 1] ^= *p++; 419 420 p = &code_block->length; 421 422 for (i = 0; i < sizeof(*code_block);) { 423 int tosend = sizeof(*code_block) - i; 424 425 if (tosend > 4) 426 tosend = 4; 427 buf[0] = i + 1; 428 for (j = 0; j < tosend; ++j) 429 buf[1 + j] = p[i + j]; 430 dev_dbg(&ir->rc->dev, "%*ph", tosend + 1, buf); 431 ret = i2c_master_send(ir->tx_c, buf, tosend + 1); 432 if (ret != tosend + 1) { 433 dev_dbg(&ir->rc->dev, 434 "i2c_master_send failed with %d\n", ret); 435 return ret < 0 ? ret : -EIO; 436 } 437 i += tosend; 438 } 439 440 buf[0] = 0; 441 buf[1] = cmd; 442 ret = i2c_master_send(ir->tx_c, buf, 2); 443 if (ret != 2) { 444 dev_err(&ir->rc->dev, "i2c_master_send failed with %d\n", ret); 445 return ret < 0 ? ret : -EIO; 446 } 447 448 usleep_range(2000, 5000); 449 450 ret = i2c_master_send(ir->tx_c, buf, 1); 451 if (ret != 1) { 452 dev_err(&ir->rc->dev, "i2c_master_send failed with %d\n", ret); 453 return ret < 0 ? ret : -EIO; 454 } 455 456 return 0; 457 } 458 zilog_init(struct IR_i2c * ir)459 static int zilog_init(struct IR_i2c *ir) 460 { 461 struct code_block code_block = { .length = sizeof(code_block) }; 462 u8 buf[4]; 463 int ret; 464 465 put_unaligned_be16(0x1000, &code_block.pulse[3]); 466 467 ret = send_data_block(ir, ZILOG_INIT_END, &code_block); 468 if (ret) 469 return ret; 470 471 ret = i2c_master_recv(ir->tx_c, buf, 4); 472 if (ret != 4) { 473 dev_err(&ir->c->dev, "failed to retrieve firmware version: %d\n", 474 ret); 475 return ret < 0 ? ret : -EIO; 476 } 477 478 dev_info(&ir->c->dev, "Zilog/Hauppauge IR blaster firmware version %d.%d.%d\n", 479 buf[1], buf[2], buf[3]); 480 481 return 0; 482 } 483 484 /* 485 * If the last slot for pulse is the same as the current slot for pulse, 486 * then use slot no 7. 487 */ copy_codes(u8 * dst,u8 * src,unsigned int count)488 static void copy_codes(u8 *dst, u8 *src, unsigned int count) 489 { 490 u8 c, last = 0xff; 491 492 while (count--) { 493 c = *src++; 494 if ((c & 0xf0) == last) { 495 *dst++ = 0x70 | (c & 0xf); 496 } else { 497 *dst++ = c; 498 last = c & 0xf0; 499 } 500 } 501 } 502 503 /* 504 * When looking for repeats, we don't care about the trailing space. This 505 * is set to the shortest possible anyway. 506 */ cmp_no_trail(u8 * a,u8 * b,unsigned int count)507 static int cmp_no_trail(u8 *a, u8 *b, unsigned int count) 508 { 509 while (--count) { 510 if (*a++ != *b++) 511 return 1; 512 } 513 514 return (*a & 0xf0) - (*b & 0xf0); 515 } 516 find_slot(u16 * array,unsigned int size,u16 val)517 static int find_slot(u16 *array, unsigned int size, u16 val) 518 { 519 int i; 520 521 for (i = 0; i < size; i++) { 522 if (get_unaligned_be16(&array[i]) == val) { 523 return i; 524 } else if (!array[i]) { 525 put_unaligned_be16(val, &array[i]); 526 return i; 527 } 528 } 529 530 return -1; 531 } 532 zilog_ir_format(struct rc_dev * rcdev,unsigned int * txbuf,unsigned int count,struct code_block * code_block)533 static int zilog_ir_format(struct rc_dev *rcdev, unsigned int *txbuf, 534 unsigned int count, struct code_block *code_block) 535 { 536 struct IR_i2c *ir = rcdev->priv; 537 int rep, i, l, p = 0, s, c = 0; 538 bool repeating; 539 u8 codes[174]; 540 541 code_block->carrier_pulse = DIV_ROUND_CLOSEST( 542 ir->duty_cycle * XTAL_FREQ / 1000, ir->carrier); 543 code_block->carrier_space = DIV_ROUND_CLOSEST( 544 (100 - ir->duty_cycle) * XTAL_FREQ / 1000, ir->carrier); 545 546 for (i = 0; i < count; i++) { 547 if (c >= ARRAY_SIZE(codes) - 1) { 548 dev_warn(&rcdev->dev, "IR too long, cannot transmit\n"); 549 return -EINVAL; 550 } 551 552 /* 553 * Lengths more than 142220us cannot be encoded; also 554 * this checks for multiply overflow 555 */ 556 if (txbuf[i] > 142220) 557 return -EINVAL; 558 559 l = DIV_ROUND_CLOSEST((XTAL_FREQ / 1000) * txbuf[i], 40000); 560 561 if (i & 1) { 562 s = find_slot(code_block->space, 563 ARRAY_SIZE(code_block->space), l); 564 if (s == -1) { 565 dev_warn(&rcdev->dev, "Too many different lengths spaces, cannot transmit"); 566 return -EINVAL; 567 } 568 569 /* We have a pulse and space */ 570 codes[c++] = (p << 4) | s; 571 } else { 572 p = find_slot(code_block->pulse, 573 ARRAY_SIZE(code_block->pulse), l); 574 if (p == -1) { 575 dev_warn(&rcdev->dev, "Too many different lengths pulses, cannot transmit"); 576 return -EINVAL; 577 } 578 } 579 } 580 581 /* We have to encode the trailing pulse. Find the shortest space */ 582 s = 0; 583 for (i = 1; i < ARRAY_SIZE(code_block->space); i++) { 584 u16 d = get_unaligned_be16(&code_block->space[i]); 585 586 if (get_unaligned_be16(&code_block->space[s]) > d) 587 s = i; 588 } 589 590 codes[c++] = (p << 4) | s; 591 592 dev_dbg(&rcdev->dev, "generated %d codes\n", c); 593 594 /* 595 * Are the last N codes (so pulse + space) repeating 3 times? 596 * if so we can shorten the codes list and use code 0xc0 to repeat 597 * them. 598 */ 599 repeating = false; 600 601 for (rep = c / 3; rep >= 1; rep--) { 602 if (!memcmp(&codes[c - rep * 3], &codes[c - rep * 2], rep) && 603 !cmp_no_trail(&codes[c - rep], &codes[c - rep * 2], rep)) { 604 repeating = true; 605 break; 606 } 607 } 608 609 if (repeating) { 610 /* first copy any leading non-repeating */ 611 int leading = c - rep * 3; 612 613 if (leading >= ARRAY_SIZE(code_block->codes) - 3 - rep) { 614 dev_warn(&rcdev->dev, "IR too long, cannot transmit\n"); 615 return -EINVAL; 616 } 617 618 dev_dbg(&rcdev->dev, "found trailing %d repeat\n", rep); 619 copy_codes(code_block->codes, codes, leading); 620 code_block->codes[leading] = 0x82; 621 copy_codes(code_block->codes + leading + 1, codes + leading, 622 rep); 623 c = leading + 1 + rep; 624 code_block->codes[c++] = 0xc0; 625 } else { 626 if (c >= ARRAY_SIZE(code_block->codes) - 3) { 627 dev_warn(&rcdev->dev, "IR too long, cannot transmit\n"); 628 return -EINVAL; 629 } 630 631 dev_dbg(&rcdev->dev, "found no trailing repeat\n"); 632 code_block->codes[0] = 0x82; 633 copy_codes(code_block->codes + 1, codes, c); 634 c++; 635 code_block->codes[c++] = 0xc4; 636 } 637 638 while (c < ARRAY_SIZE(code_block->codes)) 639 code_block->codes[c++] = 0x83; 640 641 return 0; 642 } 643 zilog_tx(struct rc_dev * rcdev,unsigned int * txbuf,unsigned int count)644 static int zilog_tx(struct rc_dev *rcdev, unsigned int *txbuf, 645 unsigned int count) 646 { 647 struct IR_i2c *ir = rcdev->priv; 648 struct code_block code_block = { .length = sizeof(code_block) }; 649 u8 buf[2]; 650 int ret, i; 651 652 ret = zilog_ir_format(rcdev, txbuf, count, &code_block); 653 if (ret) 654 return ret; 655 656 ret = mutex_lock_interruptible(&ir->lock); 657 if (ret) 658 return ret; 659 660 ret = send_data_block(ir, ZILOG_UIR_END, &code_block); 661 if (ret) 662 goto out_unlock; 663 664 ret = i2c_master_recv(ir->tx_c, buf, 1); 665 if (ret != 1) { 666 dev_err(&ir->rc->dev, "i2c_master_recv failed with %d\n", ret); 667 goto out_unlock; 668 } 669 670 dev_dbg(&ir->rc->dev, "code set status: %02x\n", buf[0]); 671 672 if (buf[0] != (ZILOG_STATUS_OK | ZILOG_STATUS_SET)) { 673 dev_err(&ir->rc->dev, "unexpected IR TX response %02x\n", 674 buf[0]); 675 ret = -EIO; 676 goto out_unlock; 677 } 678 679 buf[0] = 0x00; 680 buf[1] = ZILOG_SEND; 681 682 ret = i2c_master_send(ir->tx_c, buf, 2); 683 if (ret != 2) { 684 dev_err(&ir->rc->dev, "i2c_master_send failed with %d\n", ret); 685 if (ret >= 0) 686 ret = -EIO; 687 goto out_unlock; 688 } 689 690 dev_dbg(&ir->rc->dev, "send command sent\n"); 691 692 /* 693 * This bit NAKs until the device is ready, so we retry it 694 * sleeping a bit each time. This seems to be what the windows 695 * driver does, approximately. 696 * Try for up to 1s. 697 */ 698 for (i = 0; i < 20; ++i) { 699 set_current_state(TASK_UNINTERRUPTIBLE); 700 schedule_timeout(msecs_to_jiffies(50)); 701 ret = i2c_master_send(ir->tx_c, buf, 1); 702 if (ret == 1) 703 break; 704 dev_dbg(&ir->rc->dev, 705 "NAK expected: i2c_master_send failed with %d (try %d)\n", 706 ret, i + 1); 707 } 708 709 if (ret != 1) { 710 dev_err(&ir->rc->dev, 711 "IR TX chip never got ready: last i2c_master_send failed with %d\n", 712 ret); 713 if (ret >= 0) 714 ret = -EIO; 715 goto out_unlock; 716 } 717 718 ret = i2c_master_recv(ir->tx_c, buf, 1); 719 if (ret != 1) { 720 dev_err(&ir->rc->dev, "i2c_master_recv failed with %d\n", ret); 721 ret = -EIO; 722 goto out_unlock; 723 } else if (buf[0] != ZILOG_STATUS_OK) { 724 dev_err(&ir->rc->dev, "unexpected IR TX response #2: %02x\n", 725 buf[0]); 726 ret = -EIO; 727 goto out_unlock; 728 } 729 dev_dbg(&ir->rc->dev, "transmit complete\n"); 730 731 /* Oh good, it worked */ 732 ret = count; 733 out_unlock: 734 mutex_unlock(&ir->lock); 735 736 return ret; 737 } 738 zilog_tx_carrier(struct rc_dev * dev,u32 carrier)739 static int zilog_tx_carrier(struct rc_dev *dev, u32 carrier) 740 { 741 struct IR_i2c *ir = dev->priv; 742 743 if (carrier > 500000 || carrier < 20000) 744 return -EINVAL; 745 746 ir->carrier = carrier; 747 748 return 0; 749 } 750 zilog_tx_duty_cycle(struct rc_dev * dev,u32 duty_cycle)751 static int zilog_tx_duty_cycle(struct rc_dev *dev, u32 duty_cycle) 752 { 753 struct IR_i2c *ir = dev->priv; 754 755 ir->duty_cycle = duty_cycle; 756 757 return 0; 758 } 759 ir_probe(struct i2c_client * client)760 static int ir_probe(struct i2c_client *client) 761 { 762 const struct i2c_device_id *id = i2c_client_get_device_id(client); 763 char *ir_codes = NULL; 764 const char *name = NULL; 765 u64 rc_proto = RC_PROTO_BIT_UNKNOWN; 766 struct IR_i2c *ir; 767 struct rc_dev *rc = NULL; 768 struct i2c_adapter *adap = client->adapter; 769 unsigned short addr = client->addr; 770 bool probe_tx = (id->driver_data & FLAG_TX) != 0; 771 int err; 772 773 if ((id->driver_data & FLAG_HDPVR) && !enable_hdpvr) { 774 dev_err(&client->dev, "IR for HDPVR is known to cause problems during recording, use enable_hdpvr modparam to enable\n"); 775 return -ENODEV; 776 } 777 778 ir = devm_kzalloc(&client->dev, sizeof(*ir), GFP_KERNEL); 779 if (!ir) 780 return -ENOMEM; 781 782 ir->c = client; 783 ir->polling_interval = DEFAULT_POLLING_INTERVAL; 784 i2c_set_clientdata(client, ir); 785 786 switch(addr) { 787 case 0x64: 788 name = "Pixelview"; 789 ir->get_key = get_key_pixelview; 790 rc_proto = RC_PROTO_BIT_OTHER; 791 ir_codes = RC_MAP_EMPTY; 792 break; 793 case 0x18: 794 case 0x1f: 795 case 0x1a: 796 name = "Hauppauge"; 797 ir->get_key = get_key_haup; 798 rc_proto = RC_PROTO_BIT_RC5; 799 ir_codes = RC_MAP_HAUPPAUGE; 800 break; 801 case 0x30: 802 name = "KNC One"; 803 ir->get_key = get_key_knc1; 804 rc_proto = RC_PROTO_BIT_OTHER; 805 ir_codes = RC_MAP_EMPTY; 806 break; 807 case 0x33: 808 name = "Geniatech"; 809 ir->get_key = get_key_geniatech; 810 rc_proto = RC_PROTO_BIT_RC5; 811 ir_codes = RC_MAP_TOTAL_MEDIA_IN_HAND_02; 812 ir->old = 0xfc; 813 break; 814 case 0x6b: 815 name = "FusionHDTV"; 816 ir->get_key = get_key_fusionhdtv; 817 rc_proto = RC_PROTO_BIT_UNKNOWN; 818 ir_codes = RC_MAP_FUSIONHDTV_MCE; 819 break; 820 case 0x40: 821 name = "AVerMedia Cardbus remote"; 822 ir->get_key = get_key_avermedia_cardbus; 823 rc_proto = RC_PROTO_BIT_OTHER; 824 ir_codes = RC_MAP_AVERMEDIA_CARDBUS; 825 break; 826 case 0x41: 827 name = "AVerMedia EM78P153"; 828 ir->get_key = get_key_avermedia_cardbus; 829 rc_proto = RC_PROTO_BIT_OTHER; 830 /* RM-KV remote, seems to be same as RM-K6 */ 831 ir_codes = RC_MAP_AVERMEDIA_M733A_RM_K6; 832 break; 833 case 0x71: 834 name = "Hauppauge/Zilog Z8"; 835 ir->get_key = get_key_haup_xvr; 836 rc_proto = RC_PROTO_BIT_RC5 | RC_PROTO_BIT_RC6_MCE | 837 RC_PROTO_BIT_RC6_6A_32; 838 ir_codes = RC_MAP_HAUPPAUGE; 839 ir->polling_interval = 125; 840 probe_tx = true; 841 break; 842 } 843 844 /* Let the caller override settings */ 845 if (client->dev.platform_data) { 846 const struct IR_i2c_init_data *init_data = 847 client->dev.platform_data; 848 849 ir_codes = init_data->ir_codes; 850 rc = init_data->rc_dev; 851 852 name = init_data->name; 853 if (init_data->type) 854 rc_proto = init_data->type; 855 856 if (init_data->polling_interval) 857 ir->polling_interval = init_data->polling_interval; 858 859 switch (init_data->internal_get_key_func) { 860 case IR_KBD_GET_KEY_CUSTOM: 861 /* The bridge driver provided us its own function */ 862 ir->get_key = init_data->get_key; 863 break; 864 case IR_KBD_GET_KEY_PIXELVIEW: 865 ir->get_key = get_key_pixelview; 866 break; 867 case IR_KBD_GET_KEY_HAUP: 868 ir->get_key = get_key_haup; 869 break; 870 case IR_KBD_GET_KEY_KNC1: 871 ir->get_key = get_key_knc1; 872 break; 873 case IR_KBD_GET_KEY_GENIATECH: 874 ir->get_key = get_key_geniatech; 875 break; 876 case IR_KBD_GET_KEY_FUSIONHDTV: 877 ir->get_key = get_key_fusionhdtv; 878 break; 879 case IR_KBD_GET_KEY_HAUP_XVR: 880 ir->get_key = get_key_haup_xvr; 881 break; 882 case IR_KBD_GET_KEY_AVERMEDIA_CARDBUS: 883 ir->get_key = get_key_avermedia_cardbus; 884 break; 885 } 886 } 887 888 if (!rc) { 889 /* 890 * If platform_data doesn't specify rc_dev, initialize it 891 * internally 892 */ 893 rc = rc_allocate_device(RC_DRIVER_SCANCODE); 894 if (!rc) 895 return -ENOMEM; 896 } 897 ir->rc = rc; 898 899 /* Make sure we are all setup before going on */ 900 if (!name || !ir->get_key || !rc_proto || !ir_codes) { 901 dev_warn(&client->dev, "Unsupported device at address 0x%02x\n", 902 addr); 903 err = -ENODEV; 904 goto err_out_free; 905 } 906 907 ir->ir_codes = ir_codes; 908 909 snprintf(ir->phys, sizeof(ir->phys), "%s/%s", dev_name(&adap->dev), 910 dev_name(&client->dev)); 911 912 /* 913 * Initialize input_dev fields 914 * It doesn't make sense to allow overriding them via platform_data 915 */ 916 rc->input_id.bustype = BUS_I2C; 917 rc->input_phys = ir->phys; 918 rc->device_name = name; 919 rc->dev.parent = &client->dev; 920 rc->priv = ir; 921 rc->open = ir_open; 922 rc->close = ir_close; 923 924 /* 925 * Initialize the other fields of rc_dev 926 */ 927 rc->map_name = ir->ir_codes; 928 rc->allowed_protocols = rc_proto; 929 if (!rc->driver_name) 930 rc->driver_name = KBUILD_MODNAME; 931 932 mutex_init(&ir->lock); 933 934 INIT_DELAYED_WORK(&ir->work, ir_work); 935 936 if (probe_tx) { 937 ir->tx_c = i2c_new_dummy_device(client->adapter, 0x70); 938 if (IS_ERR(ir->tx_c)) { 939 dev_err(&client->dev, "failed to setup tx i2c address"); 940 err = PTR_ERR(ir->tx_c); 941 goto err_out_free; 942 } else if (!zilog_init(ir)) { 943 ir->carrier = 38000; 944 ir->duty_cycle = 40; 945 rc->tx_ir = zilog_tx; 946 rc->s_tx_carrier = zilog_tx_carrier; 947 rc->s_tx_duty_cycle = zilog_tx_duty_cycle; 948 } 949 } 950 951 err = rc_register_device(rc); 952 if (err) 953 goto err_out_free; 954 955 return 0; 956 957 err_out_free: 958 if (!IS_ERR(ir->tx_c)) 959 i2c_unregister_device(ir->tx_c); 960 961 /* Only frees rc if it were allocated internally */ 962 rc_free_device(rc); 963 return err; 964 } 965 ir_remove(struct i2c_client * client)966 static void ir_remove(struct i2c_client *client) 967 { 968 struct IR_i2c *ir = i2c_get_clientdata(client); 969 970 cancel_delayed_work_sync(&ir->work); 971 972 i2c_unregister_device(ir->tx_c); 973 974 rc_unregister_device(ir->rc); 975 } 976 977 static const struct i2c_device_id ir_kbd_id[] = { 978 /* Generic entry for any IR receiver */ 979 { "ir_video", 0 }, 980 /* IR device specific entries should be added here */ 981 { "ir_z8f0811_haup", FLAG_TX }, 982 { "ir_z8f0811_hdpvr", FLAG_TX | FLAG_HDPVR }, 983 { } 984 }; 985 MODULE_DEVICE_TABLE(i2c, ir_kbd_id); 986 987 static struct i2c_driver ir_kbd_driver = { 988 .driver = { 989 .name = "ir-kbd-i2c", 990 }, 991 .probe = ir_probe, 992 .remove = ir_remove, 993 .id_table = ir_kbd_id, 994 }; 995 996 module_i2c_driver(ir_kbd_driver); 997 998 /* ----------------------------------------------------------------------- */ 999 1000 MODULE_AUTHOR("Gerd Knorr, Michal Kochanowicz, Christoph Bartelmus, Ulrich Mueller"); 1001 MODULE_DESCRIPTION("input driver for i2c IR remote controls"); 1002 MODULE_LICENSE("GPL"); 1003