1 /* 2 * serial_ir.c 3 * 4 * serial_ir - Device driver that records pulse- and pause-lengths 5 * (space-lengths) between DDCD event on a serial port. 6 * 7 * Copyright (C) 1996,97 Ralph Metzler <rjkm@thp.uni-koeln.de> 8 * Copyright (C) 1998 Trent Piepho <xyzzy@u.washington.edu> 9 * Copyright (C) 1998 Ben Pfaff <blp@gnu.org> 10 * Copyright (C) 1999 Christoph Bartelmus <lirc@bartelmus.de> 11 * Copyright (C) 2007 Andrei Tanas <andrei@tanas.ca> (suspend/resume support) 12 * Copyright (C) 2016 Sean Young <sean@mess.org> (port to rc-core) 13 * This program is free software; you can redistribute it and/or modify 14 * it under the terms of the GNU General Public License as published by 15 * the Free Software Foundation; either version 2 of the License, or 16 * (at your option) any later version. 17 * 18 * This program is distributed in the hope that it will be useful, 19 * but WITHOUT ANY WARRANTY; without even the implied warranty of 20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 21 * GNU General Public License for more details. 22 */ 23 24 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 25 26 #include <linux/module.h> 27 #include <linux/errno.h> 28 #include <linux/interrupt.h> 29 #include <linux/kernel.h> 30 #include <linux/serial_reg.h> 31 #include <linux/types.h> 32 #include <linux/delay.h> 33 #include <linux/platform_device.h> 34 #include <linux/spinlock.h> 35 #include <media/rc-core.h> 36 37 struct serial_ir_hw { 38 int signal_pin; 39 int signal_pin_change; 40 u8 on; 41 u8 off; 42 unsigned set_send_carrier:1; 43 unsigned set_duty_cycle:1; 44 void (*send_pulse)(unsigned int length, ktime_t edge); 45 void (*send_space)(void); 46 spinlock_t lock; 47 }; 48 49 #define IR_HOMEBREW 0 50 #define IR_IRDEO 1 51 #define IR_IRDEO_REMOTE 2 52 #define IR_ANIMAX 3 53 #define IR_IGOR 4 54 55 /* module parameters */ 56 static int type; 57 static int io; 58 static int irq; 59 static bool iommap; 60 static int ioshift; 61 static bool softcarrier = true; 62 static bool share_irq; 63 static int sense = -1; /* -1 = auto, 0 = active high, 1 = active low */ 64 static bool txsense; /* 0 = active high, 1 = active low */ 65 66 /* forward declarations */ 67 static void send_pulse_irdeo(unsigned int length, ktime_t edge); 68 static void send_space_irdeo(void); 69 #ifdef CONFIG_IR_SERIAL_TRANSMITTER 70 static void send_pulse_homebrew(unsigned int length, ktime_t edge); 71 static void send_space_homebrew(void); 72 #endif 73 74 static struct serial_ir_hw hardware[] = { 75 [IR_HOMEBREW] = { 76 .lock = __SPIN_LOCK_UNLOCKED(hardware[IR_HOMEBREW].lock), 77 .signal_pin = UART_MSR_DCD, 78 .signal_pin_change = UART_MSR_DDCD, 79 .on = (UART_MCR_RTS | UART_MCR_OUT2 | UART_MCR_DTR), 80 .off = (UART_MCR_RTS | UART_MCR_OUT2), 81 #ifdef CONFIG_IR_SERIAL_TRANSMITTER 82 .send_pulse = send_pulse_homebrew, 83 .send_space = send_space_homebrew, 84 .set_send_carrier = true, 85 .set_duty_cycle = true, 86 #endif 87 }, 88 89 [IR_IRDEO] = { 90 .lock = __SPIN_LOCK_UNLOCKED(hardware[IR_IRDEO].lock), 91 .signal_pin = UART_MSR_DSR, 92 .signal_pin_change = UART_MSR_DDSR, 93 .on = UART_MCR_OUT2, 94 .off = (UART_MCR_RTS | UART_MCR_DTR | UART_MCR_OUT2), 95 .send_pulse = send_pulse_irdeo, 96 .send_space = send_space_irdeo, 97 .set_duty_cycle = true, 98 }, 99 100 [IR_IRDEO_REMOTE] = { 101 .lock = __SPIN_LOCK_UNLOCKED(hardware[IR_IRDEO_REMOTE].lock), 102 .signal_pin = UART_MSR_DSR, 103 .signal_pin_change = UART_MSR_DDSR, 104 .on = (UART_MCR_RTS | UART_MCR_DTR | UART_MCR_OUT2), 105 .off = (UART_MCR_RTS | UART_MCR_DTR | UART_MCR_OUT2), 106 .send_pulse = send_pulse_irdeo, 107 .send_space = send_space_irdeo, 108 .set_duty_cycle = true, 109 }, 110 111 [IR_ANIMAX] = { 112 .lock = __SPIN_LOCK_UNLOCKED(hardware[IR_ANIMAX].lock), 113 .signal_pin = UART_MSR_DCD, 114 .signal_pin_change = UART_MSR_DDCD, 115 .on = 0, 116 .off = (UART_MCR_RTS | UART_MCR_DTR | UART_MCR_OUT2), 117 }, 118 119 [IR_IGOR] = { 120 .lock = __SPIN_LOCK_UNLOCKED(hardware[IR_IGOR].lock), 121 .signal_pin = UART_MSR_DSR, 122 .signal_pin_change = UART_MSR_DDSR, 123 .on = (UART_MCR_RTS | UART_MCR_OUT2 | UART_MCR_DTR), 124 .off = (UART_MCR_RTS | UART_MCR_OUT2), 125 #ifdef CONFIG_IR_SERIAL_TRANSMITTER 126 .send_pulse = send_pulse_homebrew, 127 .send_space = send_space_homebrew, 128 .set_send_carrier = true, 129 .set_duty_cycle = true, 130 #endif 131 }, 132 }; 133 134 #define RS_ISR_PASS_LIMIT 256 135 136 struct serial_ir { 137 ktime_t lastkt; 138 struct rc_dev *rcdev; 139 struct platform_device *pdev; 140 141 unsigned int freq; 142 unsigned int duty_cycle; 143 144 unsigned int pulse_width, space_width; 145 }; 146 147 static struct serial_ir serial_ir; 148 149 /* fetch serial input packet (1 byte) from register offset */ 150 static u8 sinp(int offset) 151 { 152 if (iommap) 153 /* the register is memory-mapped */ 154 offset <<= ioshift; 155 156 return inb(io + offset); 157 } 158 159 /* write serial output packet (1 byte) of value to register offset */ 160 static void soutp(int offset, u8 value) 161 { 162 if (iommap) 163 /* the register is memory-mapped */ 164 offset <<= ioshift; 165 166 outb(value, io + offset); 167 } 168 169 static void on(void) 170 { 171 if (txsense) 172 soutp(UART_MCR, hardware[type].off); 173 else 174 soutp(UART_MCR, hardware[type].on); 175 } 176 177 static void off(void) 178 { 179 if (txsense) 180 soutp(UART_MCR, hardware[type].on); 181 else 182 soutp(UART_MCR, hardware[type].off); 183 } 184 185 static void init_timing_params(unsigned int new_duty_cycle, 186 unsigned int new_freq) 187 { 188 serial_ir.duty_cycle = new_duty_cycle; 189 serial_ir.freq = new_freq; 190 191 serial_ir.pulse_width = DIV_ROUND_CLOSEST( 192 new_duty_cycle * NSEC_PER_SEC, new_freq * 100l); 193 serial_ir.space_width = DIV_ROUND_CLOSEST( 194 (100l - new_duty_cycle) * NSEC_PER_SEC, new_freq * 100l); 195 } 196 197 static void send_pulse_irdeo(unsigned int length, ktime_t target) 198 { 199 long rawbits; 200 int i; 201 unsigned char output; 202 unsigned char chunk, shifted; 203 204 /* how many bits have to be sent ? */ 205 rawbits = length * 1152 / 10000; 206 if (serial_ir.duty_cycle > 50) 207 chunk = 3; 208 else 209 chunk = 1; 210 for (i = 0, output = 0x7f; rawbits > 0; rawbits -= 3) { 211 shifted = chunk << (i * 3); 212 shifted >>= 1; 213 output &= (~shifted); 214 i++; 215 if (i == 3) { 216 soutp(UART_TX, output); 217 while (!(sinp(UART_LSR) & UART_LSR_THRE)) 218 ; 219 output = 0x7f; 220 i = 0; 221 } 222 } 223 if (i != 0) { 224 soutp(UART_TX, output); 225 while (!(sinp(UART_LSR) & UART_LSR_TEMT)) 226 ; 227 } 228 } 229 230 static void send_space_irdeo(void) 231 { 232 } 233 234 #ifdef CONFIG_IR_SERIAL_TRANSMITTER 235 static void send_pulse_homebrew_softcarrier(unsigned int length, ktime_t edge) 236 { 237 ktime_t now, target = ktime_add_us(edge, length); 238 /* 239 * delta should never exceed 4 seconds and on m68k 240 * ndelay(s64) does not compile; so use s32 rather than s64. 241 */ 242 s32 delta; 243 244 for (;;) { 245 now = ktime_get(); 246 if (ktime_compare(now, target) >= 0) 247 break; 248 on(); 249 edge = ktime_add_ns(edge, serial_ir.pulse_width); 250 delta = ktime_to_ns(ktime_sub(edge, now)); 251 if (delta > 0) 252 ndelay(delta); 253 now = ktime_get(); 254 off(); 255 if (ktime_compare(now, target) >= 0) 256 break; 257 edge = ktime_add_ns(edge, serial_ir.space_width); 258 delta = ktime_to_ns(ktime_sub(edge, now)); 259 if (delta > 0) 260 ndelay(delta); 261 } 262 } 263 264 static void send_pulse_homebrew(unsigned int length, ktime_t edge) 265 { 266 if (softcarrier) 267 send_pulse_homebrew_softcarrier(length, edge); 268 else 269 on(); 270 } 271 272 static void send_space_homebrew(void) 273 { 274 off(); 275 } 276 #endif 277 278 static void frbwrite(unsigned int l, bool is_pulse) 279 { 280 /* simple noise filter */ 281 static unsigned int ptr, pulse, space; 282 DEFINE_IR_RAW_EVENT(ev); 283 284 if (ptr > 0 && is_pulse) { 285 pulse += l; 286 if (pulse > 250000) { 287 ev.duration = space; 288 ev.pulse = false; 289 ir_raw_event_store_with_filter(serial_ir.rcdev, &ev); 290 ev.duration = pulse; 291 ev.pulse = true; 292 ir_raw_event_store_with_filter(serial_ir.rcdev, &ev); 293 ptr = 0; 294 pulse = 0; 295 } 296 return; 297 } 298 if (!is_pulse) { 299 if (ptr == 0) { 300 if (l > 20000000) { 301 space = l; 302 ptr++; 303 return; 304 } 305 } else { 306 if (l > 20000000) { 307 space += pulse; 308 if (space > IR_MAX_DURATION) 309 space = IR_MAX_DURATION; 310 space += l; 311 if (space > IR_MAX_DURATION) 312 space = IR_MAX_DURATION; 313 pulse = 0; 314 return; 315 } 316 317 ev.duration = space; 318 ev.pulse = false; 319 ir_raw_event_store_with_filter(serial_ir.rcdev, &ev); 320 ev.duration = pulse; 321 ev.pulse = true; 322 ir_raw_event_store_with_filter(serial_ir.rcdev, &ev); 323 ptr = 0; 324 pulse = 0; 325 } 326 } 327 328 ev.duration = l; 329 ev.pulse = is_pulse; 330 ir_raw_event_store_with_filter(serial_ir.rcdev, &ev); 331 } 332 333 static irqreturn_t serial_ir_irq_handler(int i, void *blah) 334 { 335 ktime_t kt; 336 int counter, dcd; 337 u8 status; 338 ktime_t delkt; 339 unsigned int data; 340 static int last_dcd = -1; 341 342 if ((sinp(UART_IIR) & UART_IIR_NO_INT)) { 343 /* not our interrupt */ 344 return IRQ_NONE; 345 } 346 347 counter = 0; 348 do { 349 counter++; 350 status = sinp(UART_MSR); 351 if (counter > RS_ISR_PASS_LIMIT) { 352 dev_err(&serial_ir.pdev->dev, "Trapped in interrupt"); 353 break; 354 } 355 if ((status & hardware[type].signal_pin_change) && 356 sense != -1) { 357 /* get current time */ 358 kt = ktime_get(); 359 360 /* 361 * The driver needs to know if your receiver is 362 * active high or active low, or the space/pulse 363 * sense could be inverted. 364 */ 365 366 /* calc time since last interrupt in nanoseconds */ 367 dcd = (status & hardware[type].signal_pin) ? 1 : 0; 368 369 if (dcd == last_dcd) { 370 dev_err(&serial_ir.pdev->dev, 371 "ignoring spike: %d %d %lldns %lldns\n", 372 dcd, sense, ktime_to_ns(kt), 373 ktime_to_ns(serial_ir.lastkt)); 374 continue; 375 } 376 377 delkt = ktime_sub(kt, serial_ir.lastkt); 378 if (ktime_compare(delkt, ktime_set(15, 0)) > 0) { 379 data = IR_MAX_DURATION; /* really long time */ 380 if (!(dcd ^ sense)) { 381 /* sanity check */ 382 dev_err(&serial_ir.pdev->dev, 383 "dcd unexpected: %d %d %lldns %lldns\n", 384 dcd, sense, ktime_to_ns(kt), 385 ktime_to_ns(serial_ir.lastkt)); 386 /* 387 * detecting pulse while this 388 * MUST be a space! 389 */ 390 sense = sense ? 0 : 1; 391 } 392 } else { 393 data = ktime_to_ns(delkt); 394 } 395 frbwrite(data, !(dcd ^ sense)); 396 serial_ir.lastkt = kt; 397 last_dcd = dcd; 398 ir_raw_event_handle(serial_ir.rcdev); 399 } 400 } while (!(sinp(UART_IIR) & UART_IIR_NO_INT)); /* still pending ? */ 401 return IRQ_HANDLED; 402 } 403 404 static int hardware_init_port(void) 405 { 406 u8 scratch, scratch2, scratch3; 407 408 /* 409 * This is a simple port existence test, borrowed from the autoconfig 410 * function in drivers/tty/serial/8250/8250_port.c 411 */ 412 scratch = sinp(UART_IER); 413 soutp(UART_IER, 0); 414 #ifdef __i386__ 415 outb(0xff, 0x080); 416 #endif 417 scratch2 = sinp(UART_IER) & 0x0f; 418 soutp(UART_IER, 0x0f); 419 #ifdef __i386__ 420 outb(0x00, 0x080); 421 #endif 422 scratch3 = sinp(UART_IER) & 0x0f; 423 soutp(UART_IER, scratch); 424 if (scratch2 != 0 || scratch3 != 0x0f) { 425 /* we fail, there's nothing here */ 426 pr_err("port existence test failed, cannot continue\n"); 427 return -ENODEV; 428 } 429 430 /* Set DLAB 0. */ 431 soutp(UART_LCR, sinp(UART_LCR) & (~UART_LCR_DLAB)); 432 433 /* First of all, disable all interrupts */ 434 soutp(UART_IER, sinp(UART_IER) & 435 (~(UART_IER_MSI | UART_IER_RLSI | UART_IER_THRI | UART_IER_RDI))); 436 437 /* Clear registers. */ 438 sinp(UART_LSR); 439 sinp(UART_RX); 440 sinp(UART_IIR); 441 sinp(UART_MSR); 442 443 /* Set line for power source */ 444 off(); 445 446 /* Clear registers again to be sure. */ 447 sinp(UART_LSR); 448 sinp(UART_RX); 449 sinp(UART_IIR); 450 sinp(UART_MSR); 451 452 switch (type) { 453 case IR_IRDEO: 454 case IR_IRDEO_REMOTE: 455 /* setup port to 7N1 @ 115200 Baud */ 456 /* 7N1+start = 9 bits at 115200 ~ 3 bits at 38kHz */ 457 458 /* Set DLAB 1. */ 459 soutp(UART_LCR, sinp(UART_LCR) | UART_LCR_DLAB); 460 /* Set divisor to 1 => 115200 Baud */ 461 soutp(UART_DLM, 0); 462 soutp(UART_DLL, 1); 463 /* Set DLAB 0 + 7N1 */ 464 soutp(UART_LCR, UART_LCR_WLEN7); 465 /* THR interrupt already disabled at this point */ 466 break; 467 default: 468 break; 469 } 470 471 return 0; 472 } 473 474 static int serial_ir_probe(struct platform_device *dev) 475 { 476 int i, nlow, nhigh, result; 477 478 result = devm_request_irq(&dev->dev, irq, serial_ir_irq_handler, 479 share_irq ? IRQF_SHARED : 0, 480 KBUILD_MODNAME, &hardware); 481 if (result < 0) { 482 if (result == -EBUSY) 483 dev_err(&dev->dev, "IRQ %d busy\n", irq); 484 else if (result == -EINVAL) 485 dev_err(&dev->dev, "Bad irq number or handler\n"); 486 return result; 487 } 488 489 /* Reserve io region. */ 490 if ((iommap && 491 (devm_request_mem_region(&dev->dev, iommap, 8 << ioshift, 492 KBUILD_MODNAME) == NULL)) || 493 (!iommap && (devm_request_region(&dev->dev, io, 8, 494 KBUILD_MODNAME) == NULL))) { 495 dev_err(&dev->dev, "port %04x already in use\n", io); 496 dev_warn(&dev->dev, "use 'setserial /dev/ttySX uart none'\n"); 497 dev_warn(&dev->dev, 498 "or compile the serial port driver as module and\n"); 499 dev_warn(&dev->dev, "make sure this module is loaded first\n"); 500 return -EBUSY; 501 } 502 503 result = hardware_init_port(); 504 if (result < 0) 505 return result; 506 507 /* Initialize pulse/space widths */ 508 init_timing_params(50, 38000); 509 510 /* If pin is high, then this must be an active low receiver. */ 511 if (sense == -1) { 512 /* wait 1/2 sec for the power supply */ 513 msleep(500); 514 515 /* 516 * probe 9 times every 0.04s, collect "votes" for 517 * active high/low 518 */ 519 nlow = 0; 520 nhigh = 0; 521 for (i = 0; i < 9; i++) { 522 if (sinp(UART_MSR) & hardware[type].signal_pin) 523 nlow++; 524 else 525 nhigh++; 526 msleep(40); 527 } 528 sense = nlow >= nhigh ? 1 : 0; 529 dev_info(&dev->dev, "auto-detected active %s receiver\n", 530 sense ? "low" : "high"); 531 } else 532 dev_info(&dev->dev, "Manually using active %s receiver\n", 533 sense ? "low" : "high"); 534 535 dev_dbg(&dev->dev, "Interrupt %d, port %04x obtained\n", irq, io); 536 return 0; 537 } 538 539 static int serial_ir_open(struct rc_dev *rcdev) 540 { 541 unsigned long flags; 542 543 /* initialize timestamp */ 544 serial_ir.lastkt = ktime_get(); 545 546 spin_lock_irqsave(&hardware[type].lock, flags); 547 548 /* Set DLAB 0. */ 549 soutp(UART_LCR, sinp(UART_LCR) & (~UART_LCR_DLAB)); 550 551 soutp(UART_IER, sinp(UART_IER) | UART_IER_MSI); 552 553 spin_unlock_irqrestore(&hardware[type].lock, flags); 554 555 return 0; 556 } 557 558 static void serial_ir_close(struct rc_dev *rcdev) 559 { 560 unsigned long flags; 561 562 spin_lock_irqsave(&hardware[type].lock, flags); 563 564 /* Set DLAB 0. */ 565 soutp(UART_LCR, sinp(UART_LCR) & (~UART_LCR_DLAB)); 566 567 /* First of all, disable all interrupts */ 568 soutp(UART_IER, sinp(UART_IER) & 569 (~(UART_IER_MSI | UART_IER_RLSI | UART_IER_THRI | UART_IER_RDI))); 570 spin_unlock_irqrestore(&hardware[type].lock, flags); 571 } 572 573 static int serial_ir_tx(struct rc_dev *dev, unsigned int *txbuf, 574 unsigned int count) 575 { 576 unsigned long flags; 577 ktime_t edge; 578 s64 delta; 579 int i; 580 581 spin_lock_irqsave(&hardware[type].lock, flags); 582 if (type == IR_IRDEO) { 583 /* DTR, RTS down */ 584 on(); 585 } 586 587 edge = ktime_get(); 588 for (i = 0; i < count; i++) { 589 if (i % 2) 590 hardware[type].send_space(); 591 else 592 hardware[type].send_pulse(txbuf[i], edge); 593 594 edge = ktime_add_us(edge, txbuf[i]); 595 delta = ktime_us_delta(edge, ktime_get()); 596 if (delta > 25) { 597 spin_unlock_irqrestore(&hardware[type].lock, flags); 598 usleep_range(delta - 25, delta + 25); 599 spin_lock_irqsave(&hardware[type].lock, flags); 600 } else if (delta > 0) { 601 udelay(delta); 602 } 603 } 604 off(); 605 spin_unlock_irqrestore(&hardware[type].lock, flags); 606 return count; 607 } 608 609 static int serial_ir_tx_duty_cycle(struct rc_dev *dev, u32 cycle) 610 { 611 init_timing_params(cycle, serial_ir.freq); 612 return 0; 613 } 614 615 static int serial_ir_tx_carrier(struct rc_dev *dev, u32 carrier) 616 { 617 if (carrier > 500000 || carrier < 20000) 618 return -EINVAL; 619 620 init_timing_params(serial_ir.duty_cycle, carrier); 621 return 0; 622 } 623 624 static int serial_ir_suspend(struct platform_device *dev, 625 pm_message_t state) 626 { 627 /* Set DLAB 0. */ 628 soutp(UART_LCR, sinp(UART_LCR) & (~UART_LCR_DLAB)); 629 630 /* Disable all interrupts */ 631 soutp(UART_IER, sinp(UART_IER) & 632 (~(UART_IER_MSI | UART_IER_RLSI | UART_IER_THRI | UART_IER_RDI))); 633 634 /* Clear registers. */ 635 sinp(UART_LSR); 636 sinp(UART_RX); 637 sinp(UART_IIR); 638 sinp(UART_MSR); 639 640 return 0; 641 } 642 643 static int serial_ir_resume(struct platform_device *dev) 644 { 645 unsigned long flags; 646 int result; 647 648 result = hardware_init_port(); 649 if (result < 0) 650 return result; 651 652 spin_lock_irqsave(&hardware[type].lock, flags); 653 /* Enable Interrupt */ 654 serial_ir.lastkt = ktime_get(); 655 soutp(UART_IER, sinp(UART_IER) | UART_IER_MSI); 656 off(); 657 658 spin_unlock_irqrestore(&hardware[type].lock, flags); 659 660 return 0; 661 } 662 663 static struct platform_driver serial_ir_driver = { 664 .probe = serial_ir_probe, 665 .suspend = serial_ir_suspend, 666 .resume = serial_ir_resume, 667 .driver = { 668 .name = "serial_ir", 669 }, 670 }; 671 672 static int __init serial_ir_init(void) 673 { 674 int result; 675 676 result = platform_driver_register(&serial_ir_driver); 677 if (result) 678 return result; 679 680 serial_ir.pdev = platform_device_alloc("serial_ir", 0); 681 if (!serial_ir.pdev) { 682 result = -ENOMEM; 683 goto exit_driver_unregister; 684 } 685 686 result = platform_device_add(serial_ir.pdev); 687 if (result) 688 goto exit_device_put; 689 690 return 0; 691 692 exit_device_put: 693 platform_device_put(serial_ir.pdev); 694 exit_driver_unregister: 695 platform_driver_unregister(&serial_ir_driver); 696 return result; 697 } 698 699 static void serial_ir_exit(void) 700 { 701 platform_device_unregister(serial_ir.pdev); 702 platform_driver_unregister(&serial_ir_driver); 703 } 704 705 static int __init serial_ir_init_module(void) 706 { 707 struct rc_dev *rcdev; 708 int result; 709 710 switch (type) { 711 case IR_HOMEBREW: 712 case IR_IRDEO: 713 case IR_IRDEO_REMOTE: 714 case IR_ANIMAX: 715 case IR_IGOR: 716 /* if nothing specified, use ttyS0/com1 and irq 4 */ 717 io = io ? io : 0x3f8; 718 irq = irq ? irq : 4; 719 break; 720 default: 721 return -EINVAL; 722 } 723 if (!softcarrier) { 724 switch (type) { 725 case IR_HOMEBREW: 726 case IR_IGOR: 727 hardware[type].set_send_carrier = false; 728 hardware[type].set_duty_cycle = false; 729 break; 730 } 731 } 732 733 /* make sure sense is either -1, 0, or 1 */ 734 if (sense != -1) 735 sense = !!sense; 736 737 result = serial_ir_init(); 738 if (result) 739 return result; 740 741 rcdev = devm_rc_allocate_device(&serial_ir.pdev->dev); 742 if (!rcdev) { 743 result = -ENOMEM; 744 goto serial_cleanup; 745 } 746 747 if (hardware[type].send_pulse && hardware[type].send_space) 748 rcdev->tx_ir = serial_ir_tx; 749 if (hardware[type].set_send_carrier) 750 rcdev->s_tx_carrier = serial_ir_tx_carrier; 751 if (hardware[type].set_duty_cycle) 752 rcdev->s_tx_duty_cycle = serial_ir_tx_duty_cycle; 753 754 switch (type) { 755 case IR_HOMEBREW: 756 rcdev->input_name = "Serial IR type home-brew"; 757 break; 758 case IR_IRDEO: 759 rcdev->input_name = "Serial IR type IRdeo"; 760 break; 761 case IR_IRDEO_REMOTE: 762 rcdev->input_name = "Serial IR type IRdeo remote"; 763 break; 764 case IR_ANIMAX: 765 rcdev->input_name = "Serial IR type AnimaX"; 766 break; 767 case IR_IGOR: 768 rcdev->input_name = "Serial IR type IgorPlug"; 769 break; 770 } 771 772 rcdev->input_phys = KBUILD_MODNAME "/input0"; 773 rcdev->input_id.bustype = BUS_HOST; 774 rcdev->input_id.vendor = 0x0001; 775 rcdev->input_id.product = 0x0001; 776 rcdev->input_id.version = 0x0100; 777 rcdev->open = serial_ir_open; 778 rcdev->close = serial_ir_close; 779 rcdev->dev.parent = &serial_ir.pdev->dev; 780 rcdev->driver_type = RC_DRIVER_IR_RAW; 781 rcdev->allowed_protocols = RC_BIT_ALL; 782 rcdev->driver_name = KBUILD_MODNAME; 783 rcdev->map_name = RC_MAP_RC6_MCE; 784 rcdev->timeout = IR_DEFAULT_TIMEOUT; 785 rcdev->rx_resolution = 250000; 786 787 serial_ir.rcdev = rcdev; 788 789 result = rc_register_device(rcdev); 790 791 if (!result) 792 return 0; 793 serial_cleanup: 794 serial_ir_exit(); 795 return result; 796 } 797 798 static void __exit serial_ir_exit_module(void) 799 { 800 rc_unregister_device(serial_ir.rcdev); 801 serial_ir_exit(); 802 } 803 804 module_init(serial_ir_init_module); 805 module_exit(serial_ir_exit_module); 806 807 MODULE_DESCRIPTION("Infra-red receiver driver for serial ports."); 808 MODULE_AUTHOR("Ralph Metzler, Trent Piepho, Ben Pfaff, Christoph Bartelmus, Andrei Tanas"); 809 MODULE_LICENSE("GPL"); 810 811 module_param(type, int, 0444); 812 MODULE_PARM_DESC(type, "Hardware type (0 = home-brew, 1 = IRdeo, 2 = IRdeo Remote, 3 = AnimaX, 4 = IgorPlug"); 813 814 module_param(io, int, 0444); 815 MODULE_PARM_DESC(io, "I/O address base (0x3f8 or 0x2f8)"); 816 817 /* some architectures (e.g. intel xscale) have memory mapped registers */ 818 module_param(iommap, bool, 0444); 819 MODULE_PARM_DESC(iommap, "physical base for memory mapped I/O (0 = no memory mapped io)"); 820 821 /* 822 * some architectures (e.g. intel xscale) align the 8bit serial registers 823 * on 32bit word boundaries. 824 * See linux-kernel/drivers/tty/serial/8250/8250.c serial_in()/out() 825 */ 826 module_param(ioshift, int, 0444); 827 MODULE_PARM_DESC(ioshift, "shift I/O register offset (0 = no shift)"); 828 829 module_param(irq, int, 0444); 830 MODULE_PARM_DESC(irq, "Interrupt (4 or 3)"); 831 832 module_param(share_irq, bool, 0444); 833 MODULE_PARM_DESC(share_irq, "Share interrupts (0 = off, 1 = on)"); 834 835 module_param(sense, int, 0444); 836 MODULE_PARM_DESC(sense, "Override autodetection of IR receiver circuit (0 = active high, 1 = active low )"); 837 838 #ifdef CONFIG_IR_SERIAL_TRANSMITTER 839 module_param(txsense, bool, 0444); 840 MODULE_PARM_DESC(txsense, "Sense of transmitter circuit (0 = active high, 1 = active low )"); 841 #endif 842 843 module_param(softcarrier, bool, 0444); 844 MODULE_PARM_DESC(softcarrier, "Software carrier (0 = off, 1 = on, default on)"); 845