Loading...
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 | /*
* LIRC SIR driver, (C) 2000 Milan Pikula <www@fornax.sk>
*
* lirc_sir - Device driver for use with SIR (serial infra red)
* mode of IrDA on many notebooks.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*
* 2000/09/16 Frank Przybylski <mail@frankprzybylski.de> :
* added timeout and relaxed pulse detection, removed gap bug
*
* 2000/12/15 Christoph Bartelmus <lirc@bartelmus.de> :
* added support for Tekram Irmate 210 (sending does not work yet,
* kind of disappointing that nobody was able to implement that
* before),
* major clean-up
*
* 2001/02/27 Christoph Bartelmus <lirc@bartelmus.de> :
* added support for StrongARM SA1100 embedded microprocessor
* parts cut'n'pasted from sa1100_ir.c (C) 2000 Russell King
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/module.h>
#include <linux/sched.h>
#include <linux/errno.h>
#include <linux/signal.h>
#include <linux/fs.h>
#include <linux/interrupt.h>
#include <linux/ioport.h>
#include <linux/kernel.h>
#include <linux/serial_reg.h>
#include <linux/ktime.h>
#include <linux/string.h>
#include <linux/types.h>
#include <linux/wait.h>
#include <linux/mm.h>
#include <linux/delay.h>
#include <linux/poll.h>
#include <linux/io.h>
#include <asm/irq.h>
#include <linux/fcntl.h>
#include <linux/platform_device.h>
#include <linux/timer.h>
#include <media/lirc.h>
#include <media/lirc_dev.h>
/* SECTION: Definitions */
/*** Tekram dongle ***/
#ifdef LIRC_SIR_TEKRAM
/* stolen from kernel source */
/* definitions for Tekram dongle */
#define TEKRAM_115200 0x00
#define TEKRAM_57600 0x01
#define TEKRAM_38400 0x02
#define TEKRAM_19200 0x03
#define TEKRAM_9600 0x04
#define TEKRAM_2400 0x08
#define TEKRAM_PW 0x10 /* Pulse select bit */
/* 10bit * 1s/115200bit in milliseconds = 87ms*/
#define TIME_CONST (10000000ul/115200ul)
#endif
#ifdef LIRC_SIR_ACTISYS_ACT200L
static void init_act200(void);
#elif defined(LIRC_SIR_ACTISYS_ACT220L)
static void init_act220(void);
#endif
#define RBUF_LEN 1024
#define WBUF_LEN 1024
#define LIRC_DRIVER_NAME "lirc_sir"
#define PULSE '['
#ifndef LIRC_SIR_TEKRAM
/* 9bit * 1s/115200bit in milli seconds = 78.125ms*/
#define TIME_CONST (9000000ul/115200ul)
#endif
/* timeout for sequences in jiffies (=5/100s), must be longer than TIME_CONST */
#define SIR_TIMEOUT (HZ*5/100)
#ifndef LIRC_ON_SA1100
#ifndef LIRC_IRQ
#define LIRC_IRQ 4
#endif
#ifndef LIRC_PORT
/* for external dongles, default to com1 */
#if defined(LIRC_SIR_ACTISYS_ACT200L) || \
defined(LIRC_SIR_ACTISYS_ACT220L) || \
defined(LIRC_SIR_TEKRAM)
#define LIRC_PORT 0x3f8
#else
/* onboard sir ports are typically com3 */
#define LIRC_PORT 0x3e8
#endif
#endif
static int io = LIRC_PORT;
static int irq = LIRC_IRQ;
static int threshold = 3;
#endif
static DEFINE_SPINLOCK(timer_lock);
static struct timer_list timerlist;
/* time of last signal change detected */
static ktime_t last;
/* time of last UART data ready interrupt */
static ktime_t last_intr_time;
static int last_value;
static DECLARE_WAIT_QUEUE_HEAD(lirc_read_queue);
static DEFINE_SPINLOCK(hardware_lock);
static int rx_buf[RBUF_LEN];
static unsigned int rx_tail, rx_head;
static bool debug;
/* SECTION: Prototypes */
/* Communication with user-space */
static unsigned int lirc_poll(struct file *file, poll_table *wait);
static ssize_t lirc_read(struct file *file, char __user *buf, size_t count,
loff_t *ppos);
static ssize_t lirc_write(struct file *file, const char __user *buf, size_t n,
loff_t *pos);
static long lirc_ioctl(struct file *filep, unsigned int cmd, unsigned long arg);
static void add_read_queue(int flag, unsigned long val);
static int init_chrdev(void);
static void drop_chrdev(void);
/* Hardware */
static irqreturn_t sir_interrupt(int irq, void *dev_id);
static void send_space(unsigned long len);
static void send_pulse(unsigned long len);
static int init_hardware(void);
static void drop_hardware(void);
/* Initialisation */
static int init_port(void);
static void drop_port(void);
static inline unsigned int sinp(int offset)
{
return inb(io + offset);
}
static inline void soutp(int offset, int value)
{
outb(value, io + offset);
}
#ifndef MAX_UDELAY_MS
#define MAX_UDELAY_US 5000
#else
#define MAX_UDELAY_US (MAX_UDELAY_MS*1000)
#endif
static void safe_udelay(unsigned long usecs)
{
while (usecs > MAX_UDELAY_US) {
udelay(MAX_UDELAY_US);
usecs -= MAX_UDELAY_US;
}
udelay(usecs);
}
/* SECTION: Communication with user-space */
static unsigned int lirc_poll(struct file *file, poll_table *wait)
{
poll_wait(file, &lirc_read_queue, wait);
if (rx_head != rx_tail)
return POLLIN | POLLRDNORM;
return 0;
}
static ssize_t lirc_read(struct file *file, char __user *buf, size_t count,
loff_t *ppos)
{
int n = 0;
int retval = 0;
DECLARE_WAITQUEUE(wait, current);
if (count % sizeof(int))
return -EINVAL;
add_wait_queue(&lirc_read_queue, &wait);
set_current_state(TASK_INTERRUPTIBLE);
while (n < count) {
if (rx_head != rx_tail) {
if (copy_to_user(buf + n,
rx_buf + rx_head,
sizeof(int))) {
retval = -EFAULT;
break;
}
rx_head = (rx_head + 1) & (RBUF_LEN - 1);
n += sizeof(int);
} else {
if (file->f_flags & O_NONBLOCK) {
retval = -EAGAIN;
break;
}
if (signal_pending(current)) {
retval = -ERESTARTSYS;
break;
}
schedule();
set_current_state(TASK_INTERRUPTIBLE);
}
}
remove_wait_queue(&lirc_read_queue, &wait);
set_current_state(TASK_RUNNING);
return n ? n : retval;
}
static ssize_t lirc_write(struct file *file, const char __user *buf, size_t n,
loff_t *pos)
{
unsigned long flags;
int i, count;
int *tx_buf;
count = n / sizeof(int);
if (n % sizeof(int) || count % 2 == 0)
return -EINVAL;
tx_buf = memdup_user(buf, n);
if (IS_ERR(tx_buf))
return PTR_ERR(tx_buf);
i = 0;
local_irq_save(flags);
while (1) {
if (i >= count)
break;
if (tx_buf[i])
send_pulse(tx_buf[i]);
i++;
if (i >= count)
break;
if (tx_buf[i])
send_space(tx_buf[i]);
i++;
}
local_irq_restore(flags);
kfree(tx_buf);
return count;
}
static long lirc_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
{
u32 __user *uptr = (u32 __user *)arg;
int retval = 0;
u32 value = 0;
if (cmd == LIRC_GET_FEATURES)
value = LIRC_CAN_SEND_PULSE | LIRC_CAN_REC_MODE2;
else if (cmd == LIRC_GET_SEND_MODE)
value = LIRC_MODE_PULSE;
else if (cmd == LIRC_GET_REC_MODE)
value = LIRC_MODE_MODE2;
switch (cmd) {
case LIRC_GET_FEATURES:
case LIRC_GET_SEND_MODE:
case LIRC_GET_REC_MODE:
retval = put_user(value, uptr);
break;
case LIRC_SET_SEND_MODE:
case LIRC_SET_REC_MODE:
retval = get_user(value, uptr);
break;
default:
retval = -ENOIOCTLCMD;
}
if (retval)
return retval;
if (cmd == LIRC_SET_REC_MODE) {
if (value != LIRC_MODE_MODE2)
retval = -ENOSYS;
} else if (cmd == LIRC_SET_SEND_MODE) {
if (value != LIRC_MODE_PULSE)
retval = -ENOSYS;
}
return retval;
}
static void add_read_queue(int flag, unsigned long val)
{
unsigned int new_rx_tail;
int newval;
pr_debug("add flag %d with val %lu\n", flag, val);
newval = val & PULSE_MASK;
/*
* statistically, pulses are ~TIME_CONST/2 too long. we could
* maybe make this more exact, but this is good enough
*/
if (flag) {
/* pulse */
if (newval > TIME_CONST/2)
newval -= TIME_CONST/2;
else /* should not ever happen */
newval = 1;
newval |= PULSE_BIT;
} else {
newval += TIME_CONST/2;
}
new_rx_tail = (rx_tail + 1) & (RBUF_LEN - 1);
if (new_rx_tail == rx_head) {
pr_debug("Buffer overrun.\n");
return;
}
rx_buf[rx_tail] = newval;
rx_tail = new_rx_tail;
wake_up_interruptible(&lirc_read_queue);
}
static const struct file_operations lirc_fops = {
.owner = THIS_MODULE,
.read = lirc_read,
.write = lirc_write,
.poll = lirc_poll,
.unlocked_ioctl = lirc_ioctl,
#ifdef CONFIG_COMPAT
.compat_ioctl = lirc_ioctl,
#endif
.open = lirc_dev_fop_open,
.release = lirc_dev_fop_close,
.llseek = no_llseek,
};
static int set_use_inc(void *data)
{
return 0;
}
static void set_use_dec(void *data)
{
}
static struct lirc_driver driver = {
.name = LIRC_DRIVER_NAME,
.minor = -1,
.code_length = 1,
.sample_rate = 0,
.data = NULL,
.add_to_buf = NULL,
.set_use_inc = set_use_inc,
.set_use_dec = set_use_dec,
.fops = &lirc_fops,
.dev = NULL,
.owner = THIS_MODULE,
};
static struct platform_device *lirc_sir_dev;
static int init_chrdev(void)
{
driver.dev = &lirc_sir_dev->dev;
driver.minor = lirc_register_driver(&driver);
if (driver.minor < 0) {
pr_err("init_chrdev() failed.\n");
return -EIO;
}
return 0;
}
static void drop_chrdev(void)
{
lirc_unregister_driver(driver.minor);
}
/* SECTION: Hardware */
static void sir_timeout(unsigned long data)
{
/*
* if last received signal was a pulse, but receiving stopped
* within the 9 bit frame, we need to finish this pulse and
* simulate a signal change to from pulse to space. Otherwise
* upper layers will receive two sequences next time.
*/
unsigned long flags;
unsigned long pulse_end;
/* avoid interference with interrupt */
spin_lock_irqsave(&timer_lock, flags);
if (last_value) {
/* clear unread bits in UART and restart */
outb(UART_FCR_CLEAR_RCVR, io + UART_FCR);
/* determine 'virtual' pulse end: */
pulse_end = min_t(unsigned long,
ktime_us_delta(last, last_intr_time),
PULSE_MASK);
dev_dbg(driver.dev, "timeout add %d for %lu usec\n",
last_value, pulse_end);
add_read_queue(last_value, pulse_end);
last_value = 0;
last = last_intr_time;
}
spin_unlock_irqrestore(&timer_lock, flags);
}
static irqreturn_t sir_interrupt(int irq, void *dev_id)
{
unsigned char data;
ktime_t curr_time;
static unsigned long delt;
unsigned long deltintr;
unsigned long flags;
int iir, lsr;
while ((iir = inb(io + UART_IIR) & UART_IIR_ID)) {
switch (iir&UART_IIR_ID) { /* FIXME toto treba preriedit */
case UART_IIR_MSI:
(void) inb(io + UART_MSR);
break;
case UART_IIR_RLSI:
(void) inb(io + UART_LSR);
break;
case UART_IIR_THRI:
#if 0
if (lsr & UART_LSR_THRE) /* FIFO is empty */
outb(data, io + UART_TX)
#endif
break;
case UART_IIR_RDI:
/* avoid interference with timer */
spin_lock_irqsave(&timer_lock, flags);
do {
del_timer(&timerlist);
data = inb(io + UART_RX);
curr_time = ktime_get();
delt = min_t(unsigned long,
ktime_us_delta(last, curr_time),
PULSE_MASK);
deltintr = min_t(unsigned long,
ktime_us_delta(last_intr_time,
curr_time),
PULSE_MASK);
dev_dbg(driver.dev, "t %lu, d %d\n",
deltintr, (int)data);
/*
* if nothing came in last X cycles,
* it was gap
*/
if (deltintr > TIME_CONST * threshold) {
if (last_value) {
dev_dbg(driver.dev, "GAP\n");
/* simulate signal change */
add_read_queue(last_value,
delt -
deltintr);
last_value = 0;
last = last_intr_time;
delt = deltintr;
}
}
data = 1;
if (data ^ last_value) {
/*
* deltintr > 2*TIME_CONST, remember?
* the other case is timeout
*/
add_read_queue(last_value,
delt-TIME_CONST);
last_value = data;
last = curr_time;
last = ktime_sub_us(last,
TIME_CONST);
}
last_intr_time = curr_time;
if (data) {
/*
* start timer for end of
* sequence detection
*/
timerlist.expires = jiffies +
SIR_TIMEOUT;
add_timer(&timerlist);
}
lsr = inb(io + UART_LSR);
} while (lsr & UART_LSR_DR); /* data ready */
spin_unlock_irqrestore(&timer_lock, flags);
break;
default:
break;
}
}
return IRQ_RETVAL(IRQ_HANDLED);
}
static void send_space(unsigned long len)
{
safe_udelay(len);
}
static void send_pulse(unsigned long len)
{
long bytes_out = len / TIME_CONST;
if (bytes_out == 0)
bytes_out++;
while (bytes_out--) {
outb(PULSE, io + UART_TX);
/* FIXME treba seriozne cakanie z char/serial.c */
while (!(inb(io + UART_LSR) & UART_LSR_THRE))
;
}
}
static int init_hardware(void)
{
unsigned long flags;
spin_lock_irqsave(&hardware_lock, flags);
/* reset UART */
#if defined(LIRC_SIR_TEKRAM)
/* disable FIFO */
soutp(UART_FCR,
UART_FCR_CLEAR_RCVR|
UART_FCR_CLEAR_XMIT|
UART_FCR_TRIGGER_1);
/* Set DLAB 0. */
soutp(UART_LCR, sinp(UART_LCR) & (~UART_LCR_DLAB));
/* First of all, disable all interrupts */
soutp(UART_IER, sinp(UART_IER) &
(~(UART_IER_MSI|UART_IER_RLSI|UART_IER_THRI|UART_IER_RDI)));
/* Set DLAB 1. */
soutp(UART_LCR, sinp(UART_LCR) | UART_LCR_DLAB);
/* Set divisor to 12 => 9600 Baud */
soutp(UART_DLM, 0);
soutp(UART_DLL, 12);
/* Set DLAB 0. */
soutp(UART_LCR, sinp(UART_LCR) & (~UART_LCR_DLAB));
/* power supply */
soutp(UART_MCR, UART_MCR_RTS|UART_MCR_DTR|UART_MCR_OUT2);
safe_udelay(50*1000);
/* -DTR low -> reset PIC */
soutp(UART_MCR, UART_MCR_RTS|UART_MCR_OUT2);
udelay(1*1000);
soutp(UART_MCR, UART_MCR_RTS|UART_MCR_DTR|UART_MCR_OUT2);
udelay(100);
/* -RTS low -> send control byte */
soutp(UART_MCR, UART_MCR_DTR|UART_MCR_OUT2);
udelay(7);
soutp(UART_TX, TEKRAM_115200|TEKRAM_PW);
/* one byte takes ~1042 usec to transmit at 9600,8N1 */
udelay(1500);
/* back to normal operation */
soutp(UART_MCR, UART_MCR_RTS|UART_MCR_DTR|UART_MCR_OUT2);
udelay(50);
udelay(1500);
/* read previous control byte */
pr_info("0x%02x\n", sinp(UART_RX));
/* Set DLAB 1. */
soutp(UART_LCR, sinp(UART_LCR) | UART_LCR_DLAB);
/* Set divisor to 1 => 115200 Baud */
soutp(UART_DLM, 0);
soutp(UART_DLL, 1);
/* Set DLAB 0, 8 Bit */
soutp(UART_LCR, UART_LCR_WLEN8);
/* enable interrupts */
soutp(UART_IER, sinp(UART_IER)|UART_IER_RDI);
#else
outb(0, io + UART_MCR);
outb(0, io + UART_IER);
/* init UART */
/* set DLAB, speed = 115200 */
outb(UART_LCR_DLAB | UART_LCR_WLEN7, io + UART_LCR);
outb(1, io + UART_DLL); outb(0, io + UART_DLM);
/* 7N1+start = 9 bits at 115200 ~ 3 bits at 44000 */
outb(UART_LCR_WLEN7, io + UART_LCR);
/* FIFO operation */
outb(UART_FCR_ENABLE_FIFO, io + UART_FCR);
/* interrupts */
/* outb(UART_IER_RLSI|UART_IER_RDI|UART_IER_THRI, io + UART_IER); */
outb(UART_IER_RDI, io + UART_IER);
/* turn on UART */
outb(UART_MCR_DTR|UART_MCR_RTS|UART_MCR_OUT2, io + UART_MCR);
#ifdef LIRC_SIR_ACTISYS_ACT200L
init_act200();
#elif defined(LIRC_SIR_ACTISYS_ACT220L)
init_act220();
#endif
#endif
spin_unlock_irqrestore(&hardware_lock, flags);
return 0;
}
static void drop_hardware(void)
{
unsigned long flags;
spin_lock_irqsave(&hardware_lock, flags);
/* turn off interrupts */
outb(0, io + UART_IER);
spin_unlock_irqrestore(&hardware_lock, flags);
}
/* SECTION: Initialisation */
static int init_port(void)
{
int retval;
/* get I/O port access and IRQ line */
if (request_region(io, 8, LIRC_DRIVER_NAME) == NULL) {
pr_err("i/o port 0x%.4x already in use.\n", io);
return -EBUSY;
}
retval = request_irq(irq, sir_interrupt, 0,
LIRC_DRIVER_NAME, NULL);
if (retval < 0) {
release_region(io, 8);
pr_err("IRQ %d already in use.\n", irq);
return retval;
}
pr_info("I/O port 0x%.4x, IRQ %d.\n", io, irq);
setup_timer(&timerlist, sir_timeout, 0);
return 0;
}
static void drop_port(void)
{
free_irq(irq, NULL);
del_timer_sync(&timerlist);
release_region(io, 8);
}
#ifdef LIRC_SIR_ACTISYS_ACT200L
/* Crystal/Cirrus CS8130 IR transceiver, used in Actisys Act200L dongle */
/* some code borrowed from Linux IRDA driver */
/* Register 0: Control register #1 */
#define ACT200L_REG0 0x00
#define ACT200L_TXEN 0x01 /* Enable transmitter */
#define ACT200L_RXEN 0x02 /* Enable receiver */
#define ACT200L_ECHO 0x08 /* Echo control chars */
/* Register 1: Control register #2 */
#define ACT200L_REG1 0x10
#define ACT200L_LODB 0x01 /* Load new baud rate count value */
#define ACT200L_WIDE 0x04 /* Expand the maximum allowable pulse */
/* Register 3: Transmit mode register #2 */
#define ACT200L_REG3 0x30
#define ACT200L_B0 0x01 /* DataBits, 0=6, 1=7, 2=8, 3=9(8P) */
#define ACT200L_B1 0x02 /* DataBits, 0=6, 1=7, 2=8, 3=9(8P) */
#define ACT200L_CHSY 0x04 /* StartBit Synced 0=bittime, 1=startbit */
/* Register 4: Output Power register */
#define ACT200L_REG4 0x40
#define ACT200L_OP0 0x01 /* Enable LED1C output */
#define ACT200L_OP1 0x02 /* Enable LED2C output */
#define ACT200L_BLKR 0x04
/* Register 5: Receive Mode register */
#define ACT200L_REG5 0x50
#define ACT200L_RWIDL 0x01 /* fixed 1.6us pulse mode */
/*.. other various IRDA bit modes, and TV remote modes..*/
/* Register 6: Receive Sensitivity register #1 */
#define ACT200L_REG6 0x60
#define ACT200L_RS0 0x01 /* receive threshold bit 0 */
#define ACT200L_RS1 0x02 /* receive threshold bit 1 */
/* Register 7: Receive Sensitivity register #2 */
#define ACT200L_REG7 0x70
#define ACT200L_ENPOS 0x04 /* Ignore the falling edge */
/* Register 8,9: Baud Rate Divider register #1,#2 */
#define ACT200L_REG8 0x80
#define ACT200L_REG9 0x90
#define ACT200L_2400 0x5f
#define ACT200L_9600 0x17
#define ACT200L_19200 0x0b
#define ACT200L_38400 0x05
#define ACT200L_57600 0x03
#define ACT200L_115200 0x01
/* Register 13: Control register #3 */
#define ACT200L_REG13 0xd0
#define ACT200L_SHDW 0x01 /* Enable access to shadow registers */
/* Register 15: Status register */
#define ACT200L_REG15 0xf0
/* Register 21: Control register #4 */
#define ACT200L_REG21 0x50
#define ACT200L_EXCK 0x02 /* Disable clock output driver */
#define ACT200L_OSCL 0x04 /* oscillator in low power, medium accuracy mode */
static void init_act200(void)
{
int i;
__u8 control[] = {
ACT200L_REG15,
ACT200L_REG13 | ACT200L_SHDW,
ACT200L_REG21 | ACT200L_EXCK | ACT200L_OSCL,
ACT200L_REG13,
ACT200L_REG7 | ACT200L_ENPOS,
ACT200L_REG6 | ACT200L_RS0 | ACT200L_RS1,
ACT200L_REG5 | ACT200L_RWIDL,
ACT200L_REG4 | ACT200L_OP0 | ACT200L_OP1 | ACT200L_BLKR,
ACT200L_REG3 | ACT200L_B0,
ACT200L_REG0 | ACT200L_TXEN | ACT200L_RXEN,
ACT200L_REG8 | (ACT200L_115200 & 0x0f),
ACT200L_REG9 | ((ACT200L_115200 >> 4) & 0x0f),
ACT200L_REG1 | ACT200L_LODB | ACT200L_WIDE
};
/* Set DLAB 1. */
soutp(UART_LCR, UART_LCR_DLAB | UART_LCR_WLEN8);
/* Set divisor to 12 => 9600 Baud */
soutp(UART_DLM, 0);
soutp(UART_DLL, 12);
/* Set DLAB 0. */
soutp(UART_LCR, UART_LCR_WLEN8);
/* Set divisor to 12 => 9600 Baud */
/* power supply */
soutp(UART_MCR, UART_MCR_RTS|UART_MCR_DTR|UART_MCR_OUT2);
for (i = 0; i < 50; i++)
safe_udelay(1000);
/* Reset the dongle : set RTS low for 25 ms */
soutp(UART_MCR, UART_MCR_DTR|UART_MCR_OUT2);
for (i = 0; i < 25; i++)
udelay(1000);
soutp(UART_MCR, UART_MCR_RTS|UART_MCR_DTR|UART_MCR_OUT2);
udelay(100);
/* Clear DTR and set RTS to enter command mode */
soutp(UART_MCR, UART_MCR_RTS|UART_MCR_OUT2);
udelay(7);
/* send out the control register settings for 115K 7N1 SIR operation */
for (i = 0; i < sizeof(control); i++) {
soutp(UART_TX, control[i]);
/* one byte takes ~1042 usec to transmit at 9600,8N1 */
udelay(1500);
}
/* back to normal operation */
soutp(UART_MCR, UART_MCR_RTS|UART_MCR_DTR|UART_MCR_OUT2);
udelay(50);
udelay(1500);
soutp(UART_LCR, sinp(UART_LCR) | UART_LCR_DLAB);
/* Set DLAB 1. */
soutp(UART_LCR, UART_LCR_DLAB | UART_LCR_WLEN7);
/* Set divisor to 1 => 115200 Baud */
soutp(UART_DLM, 0);
soutp(UART_DLL, 1);
/* Set DLAB 0. */
soutp(UART_LCR, sinp(UART_LCR) & (~UART_LCR_DLAB));
/* Set DLAB 0, 7 Bit */
soutp(UART_LCR, UART_LCR_WLEN7);
/* enable interrupts */
soutp(UART_IER, sinp(UART_IER)|UART_IER_RDI);
}
#endif
#ifdef LIRC_SIR_ACTISYS_ACT220L
/*
* Derived from linux IrDA driver (net/irda/actisys.c)
* Drop me a mail for any kind of comment: maxx@spaceboyz.net
*/
void init_act220(void)
{
int i;
/* DLAB 1 */
soutp(UART_LCR, UART_LCR_DLAB|UART_LCR_WLEN7);
/* 9600 baud */
soutp(UART_DLM, 0);
soutp(UART_DLL, 12);
/* DLAB 0 */
soutp(UART_LCR, UART_LCR_WLEN7);
/* reset the dongle, set DTR low for 10us */
soutp(UART_MCR, UART_MCR_RTS|UART_MCR_OUT2);
udelay(10);
/* back to normal (still 9600) */
soutp(UART_MCR, UART_MCR_DTR|UART_MCR_RTS|UART_MCR_OUT2);
/*
* send RTS pulses until we reach 115200
* i hope this is really the same for act220l/act220l+
*/
for (i = 0; i < 3; i++) {
udelay(10);
/* set RTS low for 10 us */
soutp(UART_MCR, UART_MCR_DTR|UART_MCR_OUT2);
udelay(10);
/* set RTS high for 10 us */
soutp(UART_MCR, UART_MCR_RTS|UART_MCR_DTR|UART_MCR_OUT2);
}
/* back to normal operation */
udelay(1500); /* better safe than sorry ;) */
/* Set DLAB 1. */
soutp(UART_LCR, UART_LCR_DLAB | UART_LCR_WLEN7);
/* Set divisor to 1 => 115200 Baud */
soutp(UART_DLM, 0);
soutp(UART_DLL, 1);
/* Set DLAB 0, 7 Bit */
/* The dongle doesn't seem to have any problems with operation at 7N1 */
soutp(UART_LCR, UART_LCR_WLEN7);
/* enable interrupts */
soutp(UART_IER, UART_IER_RDI);
}
#endif
static int init_lirc_sir(void)
{
int retval;
init_waitqueue_head(&lirc_read_queue);
retval = init_port();
if (retval < 0)
return retval;
init_hardware();
pr_info("Installed.\n");
return 0;
}
static int lirc_sir_probe(struct platform_device *dev)
{
return 0;
}
static int lirc_sir_remove(struct platform_device *dev)
{
return 0;
}
static struct platform_driver lirc_sir_driver = {
.probe = lirc_sir_probe,
.remove = lirc_sir_remove,
.driver = {
.name = "lirc_sir",
},
};
static int __init lirc_sir_init(void)
{
int retval;
retval = platform_driver_register(&lirc_sir_driver);
if (retval) {
pr_err("Platform driver register failed!\n");
return -ENODEV;
}
lirc_sir_dev = platform_device_alloc("lirc_dev", 0);
if (!lirc_sir_dev) {
pr_err("Platform device alloc failed!\n");
retval = -ENOMEM;
goto pdev_alloc_fail;
}
retval = platform_device_add(lirc_sir_dev);
if (retval) {
pr_err("Platform device add failed!\n");
retval = -ENODEV;
goto pdev_add_fail;
}
retval = init_chrdev();
if (retval < 0)
goto fail;
retval = init_lirc_sir();
if (retval) {
drop_chrdev();
goto fail;
}
return 0;
fail:
platform_device_del(lirc_sir_dev);
pdev_add_fail:
platform_device_put(lirc_sir_dev);
pdev_alloc_fail:
platform_driver_unregister(&lirc_sir_driver);
return retval;
}
static void __exit lirc_sir_exit(void)
{
drop_hardware();
drop_chrdev();
drop_port();
platform_device_unregister(lirc_sir_dev);
platform_driver_unregister(&lirc_sir_driver);
pr_info("Uninstalled.\n");
}
module_init(lirc_sir_init);
module_exit(lirc_sir_exit);
#ifdef LIRC_SIR_TEKRAM
MODULE_DESCRIPTION("Infrared receiver driver for Tekram Irmate 210");
MODULE_AUTHOR("Christoph Bartelmus");
#elif defined(LIRC_SIR_ACTISYS_ACT200L)
MODULE_DESCRIPTION("LIRC driver for Actisys Act200L");
MODULE_AUTHOR("Karl Bongers");
#elif defined(LIRC_SIR_ACTISYS_ACT220L)
MODULE_DESCRIPTION("LIRC driver for Actisys Act220L(+)");
MODULE_AUTHOR("Jan Roemisch");
#else
MODULE_DESCRIPTION("Infrared receiver driver for SIR type serial ports");
MODULE_AUTHOR("Milan Pikula");
#endif
MODULE_LICENSE("GPL");
module_param(io, int, S_IRUGO);
MODULE_PARM_DESC(io, "I/O address base (0x3f8 or 0x2f8)");
module_param(irq, int, S_IRUGO);
MODULE_PARM_DESC(irq, "Interrupt (4 or 3)");
module_param(threshold, int, S_IRUGO);
MODULE_PARM_DESC(threshold, "space detection threshold (3)");
module_param(debug, bool, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(debug, "Enable debugging messages");
|