drivers/staging/media/lirc/lirc_sir.c

   1 /*
   2  * LIRC SIR driver, (C) 2000 Milan Pikula <www@fornax.sk>
   3  *
   4  * lirc_sir - Device driver for use with SIR (serial infra red)
   5  * mode of IrDA on many notebooks.
   6  *
   7  *  This program is free software; you can redistribute it and/or modify
   8  *  it under the terms of the GNU General Public License as published by
   9  *  the Free Software Foundation; either version 2 of the License, or
  10  *  (at your option) any later version.
  11  *
  12  *  This program is distributed in the hope that it will be useful,
  13  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *  GNU General Public License for more details.
  16  *
  17  *  You should have received a copy of the GNU General Public License
  18  *  along with this program; if not, write to the Free Software
  19  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  20  *
  21  *
  22  * 2000/09/16 Frank Przybylski <mail@frankprzybylski.de> :
  23  *  added timeout and relaxed pulse detection, removed gap bug
  24  *
  25  * 2000/12/15 Christoph Bartelmus <lirc@bartelmus.de> :
  26  *   added support for Tekram Irmate 210 (sending does not work yet,
  27  *   kind of disappointing that nobody was able to implement that
  28  *   before),
  29  *   major clean-up
  30  *
  31  * 2001/02/27 Christoph Bartelmus <lirc@bartelmus.de> :
  32  *   added support for StrongARM SA1100 embedded microprocessor
  33  *   parts cut'n'pasted from sa1100_ir.c (C) 2000 Russell King
  34  */
  35
  36 #include <linux/module.h>
  37 #include <linux/sched.h>
  38 #include <linux/errno.h>
  39 #include <linux/signal.h>
  40 #include <linux/fs.h>
  41 #include <linux/interrupt.h>
  42 #include <linux/ioport.h>
  43 #include <linux/kernel.h>
  44 #include <linux/serial_reg.h>
  45 #include <linux/time.h>
  46 #include <linux/string.h>
  47 #include <linux/types.h>
  48 #include <linux/wait.h>
  49 #include <linux/mm.h>
  50 #include <linux/delay.h>
  51 #include <linux/poll.h>
  52 #include <linux/io.h>
  53 #include <asm/irq.h>
  54 #include <linux/fcntl.h>
  55 #include <linux/platform_device.h>
  56 #ifdef LIRC_ON_SA1100
  57 #include <asm/hardware.h>
  58 #ifdef CONFIG_SA1100_COLLIE
  59 #include <asm/arch/tc35143.h>
  60 #include <asm/ucb1200.h>
  61 #endif
  62 #endif
  63
  64 #include <linux/timer.h>
  65
  66 #include <media/lirc.h>
  67 #include <media/lirc_dev.h>
  68
  69 /* SECTION: Definitions */
  70
  71 /*** Tekram dongle ***/
  72 #ifdef LIRC_SIR_TEKRAM
  73 /* stolen from kernel source */
  74 /* definitions for Tekram dongle */
  75 #define TEKRAM_115200 0x00
  76 #define TEKRAM_57600  0x01
  77 #define TEKRAM_38400  0x02
  78 #define TEKRAM_19200  0x03
  79 #define TEKRAM_9600   0x04
  80 #define TEKRAM_2400   0x08
  81
  82 #define TEKRAM_PW 0x10 /* Pulse select bit */
  83
  84 /* 10bit * 1s/115200bit in milliseconds = 87ms*/
  85 #define TIME_CONST (10000000ul/115200ul)
  86
  87 #endif
  88
  89 #ifdef LIRC_SIR_ACTISYS_ACT200L
  90 static void init_act200(void);
  91 #elif defined(LIRC_SIR_ACTISYS_ACT220L)
  92 static void init_act220(void);
  93 #endif
  94
  95 /*** SA1100 ***/
  96 #ifdef LIRC_ON_SA1100
  97 struct sa1100_ser2_registers {
  98         /* HSSP control register */
  99         unsigned char hscr0;
 100         /* UART registers */
 101         unsigned char utcr0;
 102         unsigned char utcr1;
 103         unsigned char utcr2;
 104         unsigned char utcr3;
 105         unsigned char utcr4;
 106         unsigned char utdr;
 107         unsigned char utsr0;
 108         unsigned char utsr1;
 109 } sr;
 110
 111 static int irq = IRQ_Ser2ICP;
 112
 113 #define LIRC_ON_SA1100_TRANSMITTER_LATENCY 0
 114
 115 /* pulse/space ratio of 50/50 */
 116 static unsigned long pulse_width = (13-LIRC_ON_SA1100_TRANSMITTER_LATENCY);
 117 /* 1000000/freq-pulse_width */
 118 static unsigned long space_width = (13-LIRC_ON_SA1100_TRANSMITTER_LATENCY);
 119 static unsigned int freq = 38000;      /* modulation frequency */
 120 static unsigned int duty_cycle = 50;   /* duty cycle of 50% */
 121
 122 #endif
 123
 124 #define RBUF_LEN 1024
 125 #define WBUF_LEN 1024
 126
 127 #define LIRC_DRIVER_NAME "lirc_sir"
 128
 129 #define PULSE '['
 130
 131 #ifndef LIRC_SIR_TEKRAM
 132 /* 9bit * 1s/115200bit in milli seconds = 78.125ms*/
 133 #define TIME_CONST (9000000ul/115200ul)
 134 #endif
 135
 136
 137 /* timeout for sequences in jiffies (=5/100s), must be longer than TIME_CONST */
 138 #define SIR_TIMEOUT     (HZ*5/100)
 139
 140 #ifndef LIRC_ON_SA1100
 141 #ifndef LIRC_IRQ
 142 #define LIRC_IRQ 4
 143 #endif
 144 #ifndef LIRC_PORT
 145 /* for external dongles, default to com1 */
 146 #if defined(LIRC_SIR_ACTISYS_ACT200L)         || \
 147             defined(LIRC_SIR_ACTISYS_ACT220L) || \
 148             defined(LIRC_SIR_TEKRAM)
 149 #define LIRC_PORT 0x3f8
 150 #else
 151 /* onboard sir ports are typically com3 */
 152 #define LIRC_PORT 0x3e8
 153 #endif
 154 #endif
 155
 156 static int io = LIRC_PORT;
 157 static int irq = LIRC_IRQ;
 158 static int threshold = 3;
 159 #endif
 160
 161 static DEFINE_SPINLOCK(timer_lock);
 162 static struct timer_list timerlist;
 163 /* time of last signal change detected */
 164 static struct timeval last_tv = {0, 0};
 165 /* time of last UART data ready interrupt */
 166 static struct timeval last_intr_tv = {0, 0};
 167 static int last_value;
 168
 169 static DECLARE_WAIT_QUEUE_HEAD(lirc_read_queue);
 170
 171 static DEFINE_SPINLOCK(hardware_lock);
 172
 173 static int rx_buf[RBUF_LEN];
 174 static unsigned int rx_tail, rx_head;
 175
 176 static bool debug;
 177 #define dprintk(fmt, args...)                                           \
 178         do {                                                            \
 179                 if (debug)                                              \
 180                         printk(KERN_DEBUG LIRC_DRIVER_NAME ": "         \
 181                                 fmt, ## args);                          \
 182         } while (0)
 183
 184 /* SECTION: Prototypes */
 185
 186 /* Communication with user-space */
 187 static unsigned int lirc_poll(struct file *file, poll_table *wait);
 188 static ssize_t lirc_read(struct file *file, char *buf, size_t count,
 189                 loff_t *ppos);
 190 static ssize_t lirc_write(struct file *file, const char *buf, size_t n,
 191                 loff_t *pos);
 192 static long lirc_ioctl(struct file *filep, unsigned int cmd, unsigned long arg);
 193 static void add_read_queue(int flag, unsigned long val);
 194 static int init_chrdev(void);
 195 static void drop_chrdev(void);
 196 /* Hardware */
 197 static irqreturn_t sir_interrupt(int irq, void *dev_id);
 198 static void send_space(unsigned long len);
 199 static void send_pulse(unsigned long len);
 200 static int init_hardware(void);
 201 static void drop_hardware(void);
 202 /* Initialisation */
 203 static int init_port(void);
 204 static void drop_port(void);
 205
 206 #ifdef LIRC_ON_SA1100
 207 static void on(void)
 208 {
 209         PPSR |= PPC_TXD2;
 210 }
 211
 212 static void off(void)
 213 {
 214         PPSR &= ~PPC_TXD2;
 215 }
 216 #else
 217 static inline unsigned int sinp(int offset)
 218 {
 219         return inb(io + offset);
 220 }
 221
 222 static inline void soutp(int offset, int value)
 223 {
 224         outb(value, io + offset);
 225 }
 226 #endif
 227
 228 #ifndef MAX_UDELAY_MS
 229 #define MAX_UDELAY_US 5000
 230 #else
 231 #define MAX_UDELAY_US (MAX_UDELAY_MS*1000)
 232 #endif
 233
 234 static void safe_udelay(unsigned long usecs)
 235 {
 236         while (usecs > MAX_UDELAY_US) {
 237                 udelay(MAX_UDELAY_US);
 238                 usecs -= MAX_UDELAY_US;
 239         }
 240         udelay(usecs);
 241 }
 242
 243 /* SECTION: Communication with user-space */
 244
 245 static unsigned int lirc_poll(struct file *file, poll_table *wait)
 246 {
 247         poll_wait(file, &lirc_read_queue, wait);
 248         if (rx_head != rx_tail)
 249                 return POLLIN | POLLRDNORM;
 250         return 0;
 251 }
 252
 253 static ssize_t lirc_read(struct file *file, char *buf, size_t count,
 254                 loff_t *ppos)
 255 {
 256         int n = 0;
 257         int retval = 0;
 258         DECLARE_WAITQUEUE(wait, current);
 259
 260         if (count % sizeof(int))
 261                 return -EINVAL;
 262
 263         add_wait_queue(&lirc_read_queue, &wait);
 264         set_current_state(TASK_INTERRUPTIBLE);
 265         while (n < count) {
 266                 if (rx_head != rx_tail) {
 267                         if (copy_to_user((void *) buf + n,
 268                                         (void *) (rx_buf + rx_head),
 269                                         sizeof(int))) {
 270                                 retval = -EFAULT;
 271                                 break;
 272                         }
 273                         rx_head = (rx_head + 1) & (RBUF_LEN - 1);
 274                         n += sizeof(int);
 275                 } else {
 276                         if (file->f_flags & O_NONBLOCK) {
 277                                 retval = -EAGAIN;
 278                                 break;
 279                         }
 280                         if (signal_pending(current)) {
 281                                 retval = -ERESTARTSYS;
 282                                 break;
 283                         }
 284                         schedule();
 285                         set_current_state(TASK_INTERRUPTIBLE);
 286                 }
 287         }
 288         remove_wait_queue(&lirc_read_queue, &wait);
 289         set_current_state(TASK_RUNNING);
 290         return n ? n : retval;
 291 }
 292 static ssize_t lirc_write(struct file *file, const char *buf, size_t n,
 293                                 loff_t *pos)
 294 {
 295         unsigned long flags;
 296         int i, count;
 297         int *tx_buf;
 298
 299         count = n / sizeof(int);
 300         if (n % sizeof(int) || count % 2 == 0)
 301                 return -EINVAL;
 302         tx_buf = memdup_user(buf, n);
 303         if (IS_ERR(tx_buf))
 304                 return PTR_ERR(tx_buf);
 305         i = 0;
 306 #ifdef LIRC_ON_SA1100
 307         /* disable receiver */
 308         Ser2UTCR3 = 0;
 309 #endif
 310         local_irq_save(flags);
 311         while (1) {
 312                 if (i >= count)
 313                         break;
 314                 if (tx_buf[i])
 315                         send_pulse(tx_buf[i]);
 316                 i++;
 317                 if (i >= count)
 318                         break;
 319                 if (tx_buf[i])
 320                         send_space(tx_buf[i]);
 321                 i++;
 322         }
 323         local_irq_restore(flags);
 324 #ifdef LIRC_ON_SA1100
 325         off();
 326         udelay(1000); /* wait 1ms for IR diode to recover */
 327         Ser2UTCR3 = 0;
 328         /* clear status register to prevent unwanted interrupts */
 329         Ser2UTSR0 &= (UTSR0_RID | UTSR0_RBB | UTSR0_REB);
 330         /* enable receiver */
 331         Ser2UTCR3 = UTCR3_RXE|UTCR3_RIE;
 332 #endif
 333         kfree(tx_buf);
 334         return count;
 335 }
 336
 337 static long lirc_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
 338 {
 339         int retval = 0;
 340         __u32 value = 0;
 341 #ifdef LIRC_ON_SA1100
 342
 343         if (cmd == LIRC_GET_FEATURES)
 344                 value = LIRC_CAN_SEND_PULSE |
 345                         LIRC_CAN_SET_SEND_DUTY_CYCLE |
 346                         LIRC_CAN_SET_SEND_CARRIER |
 347                         LIRC_CAN_REC_MODE2;
 348         else if (cmd == LIRC_GET_SEND_MODE)
 349                 value = LIRC_MODE_PULSE;
 350         else if (cmd == LIRC_GET_REC_MODE)
 351                 value = LIRC_MODE_MODE2;
 352 #else
 353         if (cmd == LIRC_GET_FEATURES)
 354                 value = LIRC_CAN_SEND_PULSE | LIRC_CAN_REC_MODE2;
 355         else if (cmd == LIRC_GET_SEND_MODE)
 356                 value = LIRC_MODE_PULSE;
 357         else if (cmd == LIRC_GET_REC_MODE)
 358                 value = LIRC_MODE_MODE2;
 359 #endif
 360
 361         switch (cmd) {
 362         case LIRC_GET_FEATURES:
 363         case LIRC_GET_SEND_MODE:
 364         case LIRC_GET_REC_MODE:
 365                 retval = put_user(value, (__u32 *) arg);
 366                 break;
 367
 368         case LIRC_SET_SEND_MODE:
 369         case LIRC_SET_REC_MODE:
 370                 retval = get_user(value, (__u32 *) arg);
 371                 break;
 372 #ifdef LIRC_ON_SA1100
 373         case LIRC_SET_SEND_DUTY_CYCLE:
 374                 retval = get_user(value, (__u32 *) arg);
 375                 if (retval)
 376                         return retval;
 377                 if (value <= 0 || value > 100)
 378                         return -EINVAL;
 379                 /* (value/100)*(1000000/freq) */
 380                 duty_cycle = value;
 381                 pulse_width = (unsigned long) duty_cycle*10000/freq;
 382                 space_width = (unsigned long) 1000000L/freq-pulse_width;
 383                 if (pulse_width >= LIRC_ON_SA1100_TRANSMITTER_LATENCY)
 384                         pulse_width -= LIRC_ON_SA1100_TRANSMITTER_LATENCY;
 385                 if (space_width >= LIRC_ON_SA1100_TRANSMITTER_LATENCY)
 386                         space_width -= LIRC_ON_SA1100_TRANSMITTER_LATENCY;
 387                 break;
 388         case LIRC_SET_SEND_CARRIER:
 389                 retval = get_user(value, (__u32 *) arg);
 390                 if (retval)
 391                         return retval;
 392                 if (value > 500000 || value < 20000)
 393                         return -EINVAL;
 394                 freq = value;
 395                 pulse_width = (unsigned long) duty_cycle*10000/freq;
 396                 space_width = (unsigned long) 1000000L/freq-pulse_width;
 397                 if (pulse_width >= LIRC_ON_SA1100_TRANSMITTER_LATENCY)
 398                         pulse_width -= LIRC_ON_SA1100_TRANSMITTER_LATENCY;
 399                 if (space_width >= LIRC_ON_SA1100_TRANSMITTER_LATENCY)
 400                         space_width -= LIRC_ON_SA1100_TRANSMITTER_LATENCY;
 401                 break;
 402 #endif
 403         default:
 404                 retval = -ENOIOCTLCMD;
 405
 406         }
 407
 408         if (retval)
 409                 return retval;
 410         if (cmd == LIRC_SET_REC_MODE) {
 411                 if (value != LIRC_MODE_MODE2)
 412                         retval = -ENOSYS;
 413         } else if (cmd == LIRC_SET_SEND_MODE) {
 414                 if (value != LIRC_MODE_PULSE)
 415                         retval = -ENOSYS;
 416         }
 417
 418         return retval;
 419 }
 420
 421 static void add_read_queue(int flag, unsigned long val)
 422 {
 423         unsigned int new_rx_tail;
 424         int newval;
 425
 426         dprintk("add flag %d with val %lu\n", flag, val);
 427
 428         newval = val & PULSE_MASK;
 429
 430         /*
 431          * statistically, pulses are ~TIME_CONST/2 too long. we could
 432          * maybe make this more exact, but this is good enough
 433          */
 434         if (flag) {
 435                 /* pulse */
 436                 if (newval > TIME_CONST/2)
 437                         newval -= TIME_CONST/2;
 438                 else /* should not ever happen */
 439                         newval = 1;
 440                 newval |= PULSE_BIT;
 441         } else {
 442                 newval += TIME_CONST/2;
 443         }
 444         new_rx_tail = (rx_tail + 1) & (RBUF_LEN - 1);
 445         if (new_rx_tail == rx_head) {
 446                 dprintk("Buffer overrun.\n");
 447                 return;
 448         }
 449         rx_buf[rx_tail] = newval;
 450         rx_tail = new_rx_tail;
 451         wake_up_interruptible(&lirc_read_queue);
 452 }
 453
 454 static const struct file_operations lirc_fops = {
 455         .owner          = THIS_MODULE,
 456         .read           = lirc_read,
 457         .write          = lirc_write,
 458         .poll           = lirc_poll,
 459         .unlocked_ioctl = lirc_ioctl,
 460 #ifdef CONFIG_COMPAT
 461         .compat_ioctl   = lirc_ioctl,
 462 #endif
 463         .open           = lirc_dev_fop_open,
 464         .release        = lirc_dev_fop_close,
 465         .llseek         = no_llseek,
 466 };
 467
 468 static int set_use_inc(void *data)
 469 {
 470         return 0;
 471 }
 472
 473 static void set_use_dec(void *data)
 474 {
 475 }
 476
 477 static struct lirc_driver driver = {
 478         .name           = LIRC_DRIVER_NAME,
 479         .minor          = -1,
 480         .code_length    = 1,
 481         .sample_rate    = 0,
 482         .data           = NULL,
 483         .add_to_buf     = NULL,
 484         .set_use_inc    = set_use_inc,
 485         .set_use_dec    = set_use_dec,
 486         .fops           = &lirc_fops,
 487         .dev            = NULL,
 488         .owner          = THIS_MODULE,
 489 };
 490
 491 static struct platform_device *lirc_sir_dev;
 492
 493 static int init_chrdev(void)
 494 {
 495         driver.dev = &lirc_sir_dev->dev;
 496         driver.minor = lirc_register_driver(&driver);
 497         if (driver.minor < 0) {
 498                 printk(KERN_ERR LIRC_DRIVER_NAME ": init_chrdev() failed.\n");
 499                 return -EIO;
 500         }
 501         return 0;
 502 }
 503
 504 static void drop_chrdev(void)
 505 {
 506         lirc_unregister_driver(driver.minor);
 507 }
 508
 509 /* SECTION: Hardware */
 510 static long delta(struct timeval *tv1, struct timeval *tv2)
 511 {
 512         unsigned long deltv;
 513
 514         deltv = tv2->tv_sec - tv1->tv_sec;
 515         if (deltv > 15)
 516                 deltv = 0xFFFFFF;
 517         else
 518                 deltv = deltv*1000000 +
 519                         tv2->tv_usec -
 520                         tv1->tv_usec;
 521         return deltv;
 522 }
 523
 524 static void sir_timeout(unsigned long data)
 525 {
 526         /*
 527          * if last received signal was a pulse, but receiving stopped
 528          * within the 9 bit frame, we need to finish this pulse and
 529          * simulate a signal change to from pulse to space. Otherwise
 530          * upper layers will receive two sequences next time.
 531          */
 532
 533         unsigned long flags;
 534         unsigned long pulse_end;
 535
 536         /* avoid interference with interrupt */
 537         spin_lock_irqsave(&timer_lock, flags);
 538         if (last_value) {
 539 #ifndef LIRC_ON_SA1100
 540                 /* clear unread bits in UART and restart */
 541                 outb(UART_FCR_CLEAR_RCVR, io + UART_FCR);
 542 #endif
 543                 /* determine 'virtual' pulse end: */
 544                 pulse_end = delta(&last_tv, &last_intr_tv);
 545                 dprintk("timeout add %d for %lu usec\n", last_value, pulse_end);
 546                 add_read_queue(last_value, pulse_end);
 547                 last_value = 0;
 548                 last_tv = last_intr_tv;
 549         }
 550         spin_unlock_irqrestore(&timer_lock, flags);
 551 }
 552
 553 static irqreturn_t sir_interrupt(int irq, void *dev_id)
 554 {
 555         unsigned char data;
 556         struct timeval curr_tv;
 557         static unsigned long deltv;
 558 #ifdef LIRC_ON_SA1100
 559         int status;
 560         static int n;
 561
 562         status = Ser2UTSR0;
 563         /*
 564          * Deal with any receive errors first.  The bytes in error may be
 565          * the only bytes in the receive FIFO, so we do this first.
 566          */
 567         while (status & UTSR0_EIF) {
 568                 int bstat;
 569
 570                 if (debug) {
 571                         dprintk("EIF\n");
 572                         bstat = Ser2UTSR1;
 573
 574                         if (bstat & UTSR1_FRE)
 575                                 dprintk("frame error\n");
 576                         if (bstat & UTSR1_ROR)
 577                                 dprintk("receive fifo overrun\n");
 578                         if (bstat & UTSR1_PRE)
 579                                 dprintk("parity error\n");
 580                 }
 581
 582                 bstat = Ser2UTDR;
 583                 n++;
 584                 status = Ser2UTSR0;
 585         }
 586
 587         if (status & (UTSR0_RFS | UTSR0_RID)) {
 588                 do_gettimeofday(&curr_tv);
 589                 deltv = delta(&last_tv, &curr_tv);
 590                 do {
 591                         data = Ser2UTDR;
 592                         dprintk("%d data: %u\n", n, (unsigned int) data);
 593                         n++;
 594                 } while (status & UTSR0_RID && /* do not empty fifo in order to
 595                                                 * get UTSR0_RID in any case */
 596                       Ser2UTSR1 & UTSR1_RNE); /* data ready */
 597
 598                 if (status&UTSR0_RID) {
 599                         add_read_queue(0 , deltv - n * TIME_CONST); /*space*/
 600                         add_read_queue(1, n * TIME_CONST); /*pulse*/
 601                         n = 0;
 602                         last_tv = curr_tv;
 603                 }
 604         }
 605
 606         if (status & UTSR0_TFS)
 607                 printk(KERN_ERR "transmit fifo not full, shouldn't happen\n");
 608
 609         /* We must clear certain bits. */
 610         status &= (UTSR0_RID | UTSR0_RBB | UTSR0_REB);
 611         if (status)
 612                 Ser2UTSR0 = status;
 613 #else
 614         unsigned long deltintrtv;
 615         unsigned long flags;
 616         int iir, lsr;
 617
 618         while ((iir = inb(io + UART_IIR) & UART_IIR_ID)) {
 619                 switch (iir&UART_IIR_ID) { /* FIXME toto treba preriedit */
 620                 case UART_IIR_MSI:
 621                         (void) inb(io + UART_MSR);
 622                         break;
 623                 case UART_IIR_RLSI:
 624                         (void) inb(io + UART_LSR);
 625                         break;
 626                 case UART_IIR_THRI:
 627 #if 0
 628                         if (lsr & UART_LSR_THRE) /* FIFO is empty */
 629                                 outb(data, io + UART_TX)
 630 #endif
 631                         break;
 632                 case UART_IIR_RDI:
 633                         /* avoid interference with timer */
 634                         spin_lock_irqsave(&timer_lock, flags);
 635                         do {
 636                                 del_timer(&timerlist);
 637                                 data = inb(io + UART_RX);
 638                                 do_gettimeofday(&curr_tv);
 639                                 deltv = delta(&last_tv, &curr_tv);
 640                                 deltintrtv = delta(&last_intr_tv, &curr_tv);
 641                                 dprintk("t %lu, d %d\n", deltintrtv, (int)data);
 642                                 /*
 643                                  * if nothing came in last X cycles,
 644                                  * it was gap
 645                                  */
 646                                 if (deltintrtv > TIME_CONST * threshold) {
 647                                         if (last_value) {
 648                                                 dprintk("GAP\n");
 649                                                 /* simulate signal change */
 650                                                 add_read_queue(last_value,
 651                                                                deltv -
 652                                                                deltintrtv);
 653                                                 last_value = 0;
 654                                                 last_tv.tv_sec =
 655                                                         last_intr_tv.tv_sec;
 656                                                 last_tv.tv_usec =
 657                                                         last_intr_tv.tv_usec;
 658                                                 deltv = deltintrtv;
 659                                         }
 660                                 }
 661                                 data = 1;
 662                                 if (data ^ last_value) {
 663                                         /*
 664                                          * deltintrtv > 2*TIME_CONST, remember?
 665                                          * the other case is timeout
 666                                          */
 667                                         add_read_queue(last_value,
 668                                                        deltv-TIME_CONST);
 669                                         last_value = data;
 670                                         last_tv = curr_tv;
 671                                         if (last_tv.tv_usec >= TIME_CONST) {
 672                                                 last_tv.tv_usec -= TIME_CONST;
 673                                         } else {
 674                                                 last_tv.tv_sec--;
 675                                                 last_tv.tv_usec += 1000000 -
 676                                                         TIME_CONST;
 677                                         }
 678                                 }
 679                                 last_intr_tv = curr_tv;
 680                                 if (data) {
 681                                         /*
 682                                          * start timer for end of
 683                                          * sequence detection
 684                                          */
 685                                         timerlist.expires = jiffies +
 686                                                                 SIR_TIMEOUT;
 687                                         add_timer(&timerlist);
 688                                 }
 689
 690                                 lsr = inb(io + UART_LSR);
 691                         } while (lsr & UART_LSR_DR); /* data ready */
 692                         spin_unlock_irqrestore(&timer_lock, flags);
 693                         break;
 694                 default:
 695                         break;
 696                 }
 697         }
 698 #endif
 699         return IRQ_RETVAL(IRQ_HANDLED);
 700 }
 701
 702 #ifdef LIRC_ON_SA1100
 703 static void send_pulse(unsigned long length)
 704 {
 705         unsigned long k, delay;
 706         int flag;
 707
 708         if (length == 0)
 709                 return;
 710         /*
 711          * this won't give us the carrier frequency we really want
 712          * due to integer arithmetic, but we can accept this inaccuracy
 713          */
 714
 715         for (k = flag = 0; k < length; k += delay, flag = !flag) {
 716                 if (flag) {
 717                         off();
 718                         delay = space_width;
 719                 } else {
 720                         on();
 721                         delay = pulse_width;
 722                 }
 723                 safe_udelay(delay);
 724         }
 725         off();
 726 }
 727
 728 static void send_space(unsigned long length)
 729 {
 730         if (length == 0)
 731                 return;
 732         off();
 733         safe_udelay(length);
 734 }
 735 #else
 736 static void send_space(unsigned long len)
 737 {
 738         safe_udelay(len);
 739 }
 740
 741 static void send_pulse(unsigned long len)
 742 {
 743         long bytes_out = len / TIME_CONST;
 744
 745         if (bytes_out == 0)
 746                 bytes_out++;
 747
 748         while (bytes_out--) {
 749                 outb(PULSE, io + UART_TX);
 750                 /* FIXME treba seriozne cakanie z char/serial.c */
 751                 while (!(inb(io + UART_LSR) & UART_LSR_THRE))
 752                         ;
 753         }
 754 }
 755 #endif
 756
 757 #ifdef CONFIG_SA1100_COLLIE
 758 static int sa1100_irda_set_power_collie(int state)
 759 {
 760         if (state) {
 761                 /*
 762                  *  0 - off
 763                  *  1 - short range, lowest power
 764                  *  2 - medium range, medium power
 765                  *  3 - maximum range, high power
 766                  */
 767                 ucb1200_set_io_direction(TC35143_GPIO_IR_ON,
 768                                          TC35143_IODIR_OUTPUT);
 769                 ucb1200_set_io(TC35143_GPIO_IR_ON, TC35143_IODAT_LOW);
 770                 udelay(100);
 771         } else {
 772                 /* OFF */
 773                 ucb1200_set_io_direction(TC35143_GPIO_IR_ON,
 774                                          TC35143_IODIR_OUTPUT);
 775                 ucb1200_set_io(TC35143_GPIO_IR_ON, TC35143_IODAT_HIGH);
 776         }
 777         return 0;
 778 }
 779 #endif
 780
 781 static int init_hardware(void)
 782 {
 783         unsigned long flags;
 784
 785         spin_lock_irqsave(&hardware_lock, flags);
 786         /* reset UART */
 787 #ifdef LIRC_ON_SA1100
 788 #ifdef CONFIG_SA1100_BITSY
 789         if (machine_is_bitsy()) {
 790                 printk(KERN_INFO "Power on IR module\n");
 791                 set_bitsy_egpio(EGPIO_BITSY_IR_ON);
 792         }
 793 #endif
 794 #ifdef CONFIG_SA1100_COLLIE
 795         sa1100_irda_set_power_collie(3);        /* power on */
 796 #endif
 797         sr.hscr0 = Ser2HSCR0;
 798
 799         sr.utcr0 = Ser2UTCR0;
 800         sr.utcr1 = Ser2UTCR1;
 801         sr.utcr2 = Ser2UTCR2;
 802         sr.utcr3 = Ser2UTCR3;
 803         sr.utcr4 = Ser2UTCR4;
 804
 805         sr.utdr = Ser2UTDR;
 806         sr.utsr0 = Ser2UTSR0;
 807         sr.utsr1 = Ser2UTSR1;
 808
 809         /* configure GPIO */
 810         /* output */
 811         PPDR |= PPC_TXD2;
 812         PSDR |= PPC_TXD2;
 813         /* set output to 0 */
 814         off();
 815
 816         /* Enable HP-SIR modulation, and ensure that the port is disabled. */
 817         Ser2UTCR3 = 0;
 818         Ser2HSCR0 = sr.hscr0 & (~HSCR0_HSSP);
 819
 820         /* clear status register to prevent unwanted interrupts */
 821         Ser2UTSR0 &= (UTSR0_RID | UTSR0_RBB | UTSR0_REB);
 822
 823         /* 7N1 */
 824         Ser2UTCR0 = UTCR0_1StpBit|UTCR0_7BitData;
 825         /* 115200 */
 826         Ser2UTCR1 = 0;
 827         Ser2UTCR2 = 1;
 828         /* use HPSIR, 1.6 usec pulses */
 829         Ser2UTCR4 = UTCR4_HPSIR|UTCR4_Z1_6us;
 830
 831         /* enable receiver, receive fifo interrupt */
 832         Ser2UTCR3 = UTCR3_RXE|UTCR3_RIE;
 833
 834         /* clear status register to prevent unwanted interrupts */
 835         Ser2UTSR0 &= (UTSR0_RID | UTSR0_RBB | UTSR0_REB);
 836
 837 #elif defined(LIRC_SIR_TEKRAM)
 838         /* disable FIFO */
 839         soutp(UART_FCR,
 840               UART_FCR_CLEAR_RCVR|
 841               UART_FCR_CLEAR_XMIT|
 842               UART_FCR_TRIGGER_1);
 843
 844         /* Set DLAB 0. */
 845         soutp(UART_LCR, sinp(UART_LCR) & (~UART_LCR_DLAB));
 846
 847         /* First of all, disable all interrupts */
 848         soutp(UART_IER, sinp(UART_IER) &
 849               (~(UART_IER_MSI|UART_IER_RLSI|UART_IER_THRI|UART_IER_RDI)));
 850
 851         /* Set DLAB 1. */
 852         soutp(UART_LCR, sinp(UART_LCR) | UART_LCR_DLAB);
 853
 854         /* Set divisor to 12 => 9600 Baud */
 855         soutp(UART_DLM, 0);
 856         soutp(UART_DLL, 12);
 857
 858         /* Set DLAB 0. */
 859         soutp(UART_LCR, sinp(UART_LCR) & (~UART_LCR_DLAB));
 860
 861         /* power supply */
 862         soutp(UART_MCR, UART_MCR_RTS|UART_MCR_DTR|UART_MCR_OUT2);
 863         safe_udelay(50*1000);
 864
 865         /* -DTR low -> reset PIC */
 866         soutp(UART_MCR, UART_MCR_RTS|UART_MCR_OUT2);
 867         udelay(1*1000);
 868
 869         soutp(UART_MCR, UART_MCR_RTS|UART_MCR_DTR|UART_MCR_OUT2);
 870         udelay(100);
 871
 872
 873         /* -RTS low -> send control byte */
 874         soutp(UART_MCR, UART_MCR_DTR|UART_MCR_OUT2);
 875         udelay(7);
 876         soutp(UART_TX, TEKRAM_115200|TEKRAM_PW);
 877
 878         /* one byte takes ~1042 usec to transmit at 9600,8N1 */
 879         udelay(1500);
 880
 881         /* back to normal operation */
 882         soutp(UART_MCR, UART_MCR_RTS|UART_MCR_DTR|UART_MCR_OUT2);
 883         udelay(50);
 884
 885         udelay(1500);
 886
 887         /* read previous control byte */
 888         printk(KERN_INFO LIRC_DRIVER_NAME
 889                ": 0x%02x\n", sinp(UART_RX));
 890
 891         /* Set DLAB 1. */
 892         soutp(UART_LCR, sinp(UART_LCR) | UART_LCR_DLAB);
 893
 894         /* Set divisor to 1 => 115200 Baud */
 895         soutp(UART_DLM, 0);
 896         soutp(UART_DLL, 1);
 897
 898         /* Set DLAB 0, 8 Bit */
 899         soutp(UART_LCR, UART_LCR_WLEN8);
 900         /* enable interrupts */
 901         soutp(UART_IER, sinp(UART_IER)|UART_IER_RDI);
 902 #else
 903         outb(0, io + UART_MCR);
 904         outb(0, io + UART_IER);
 905         /* init UART */
 906         /* set DLAB, speed = 115200 */
 907         outb(UART_LCR_DLAB | UART_LCR_WLEN7, io + UART_LCR);
 908         outb(1, io + UART_DLL); outb(0, io + UART_DLM);
 909         /* 7N1+start = 9 bits at 115200 ~ 3 bits at 44000 */
 910         outb(UART_LCR_WLEN7, io + UART_LCR);
 911         /* FIFO operation */
 912         outb(UART_FCR_ENABLE_FIFO, io + UART_FCR);
 913         /* interrupts */
 914         /* outb(UART_IER_RLSI|UART_IER_RDI|UART_IER_THRI, io + UART_IER); */
 915         outb(UART_IER_RDI, io + UART_IER);
 916         /* turn on UART */
 917         outb(UART_MCR_DTR|UART_MCR_RTS|UART_MCR_OUT2, io + UART_MCR);
 918 #ifdef LIRC_SIR_ACTISYS_ACT200L
 919         init_act200();
 920 #elif defined(LIRC_SIR_ACTISYS_ACT220L)
 921         init_act220();
 922 #endif
 923 #endif
 924         spin_unlock_irqrestore(&hardware_lock, flags);
 925         return 0;
 926 }
 927
 928 static void drop_hardware(void)
 929 {
 930         unsigned long flags;
 931
 932         spin_lock_irqsave(&hardware_lock, flags);
 933
 934 #ifdef LIRC_ON_SA1100
 935         Ser2UTCR3 = 0;
 936
 937         Ser2UTCR0 = sr.utcr0;
 938         Ser2UTCR1 = sr.utcr1;
 939         Ser2UTCR2 = sr.utcr2;
 940         Ser2UTCR4 = sr.utcr4;
 941         Ser2UTCR3 = sr.utcr3;
 942
 943         Ser2HSCR0 = sr.hscr0;
 944 #ifdef CONFIG_SA1100_BITSY
 945         if (machine_is_bitsy())
 946                 clr_bitsy_egpio(EGPIO_BITSY_IR_ON);
 947 #endif
 948 #ifdef CONFIG_SA1100_COLLIE
 949         sa1100_irda_set_power_collie(0);        /* power off */
 950 #endif
 951 #else
 952         /* turn off interrupts */
 953         outb(0, io + UART_IER);
 954 #endif
 955         spin_unlock_irqrestore(&hardware_lock, flags);
 956 }
 957
 958 /* SECTION: Initialisation */
 959
 960 static int init_port(void)
 961 {
 962         int retval;
 963
 964         /* get I/O port access and IRQ line */
 965 #ifndef LIRC_ON_SA1100
 966         if (request_region(io, 8, LIRC_DRIVER_NAME) == NULL) {
 967                 printk(KERN_ERR LIRC_DRIVER_NAME
 968                        ": i/o port 0x%.4x already in use.\n", io);
 969                 return -EBUSY;
 970         }
 971 #endif
 972         retval = request_irq(irq, sir_interrupt, 0,
 973                              LIRC_DRIVER_NAME, NULL);
 974         if (retval < 0) {
 975 #               ifndef LIRC_ON_SA1100
 976                 release_region(io, 8);
 977 #               endif
 978                 printk(KERN_ERR LIRC_DRIVER_NAME
 979                         ": IRQ %d already in use.\n",
 980                         irq);
 981                 return retval;
 982         }
 983 #ifndef LIRC_ON_SA1100
 984         printk(KERN_INFO LIRC_DRIVER_NAME
 985                 ": I/O port 0x%.4x, IRQ %d.\n",
 986                 io, irq);
 987 #endif
 988
 989         init_timer(&timerlist);
 990         timerlist.function = sir_timeout;
 991         timerlist.data = 0xabadcafe;
 992
 993         return 0;
 994 }
 995
 996 static void drop_port(void)
 997 {
 998         free_irq(irq, NULL);
 999         del_timer_sync(&timerlist);
1000 #ifndef LIRC_ON_SA1100
1001         release_region(io, 8);
1002 #endif
1003 }
1004
1005 #ifdef LIRC_SIR_ACTISYS_ACT200L
1006 /* Crystal/Cirrus CS8130 IR transceiver, used in Actisys Act200L dongle */
1007 /* some code borrowed from Linux IRDA driver */
1008
1009 /* Register 0: Control register #1 */
1010 #define ACT200L_REG0    0x00
1011 #define ACT200L_TXEN    0x01 /* Enable transmitter */
1012 #define ACT200L_RXEN    0x02 /* Enable receiver */
1013 #define ACT200L_ECHO    0x08 /* Echo control chars */
1014
1015 /* Register 1: Control register #2 */
1016 #define ACT200L_REG1    0x10
1017 #define ACT200L_LODB    0x01 /* Load new baud rate count value */
1018 #define ACT200L_WIDE    0x04 /* Expand the maximum allowable pulse */
1019
1020 /* Register 3: Transmit mode register #2 */
1021 #define ACT200L_REG3    0x30
1022 #define ACT200L_B0      0x01 /* DataBits, 0=6, 1=7, 2=8, 3=9(8P)  */
1023 #define ACT200L_B1      0x02 /* DataBits, 0=6, 1=7, 2=8, 3=9(8P)  */
1024 #define ACT200L_CHSY    0x04 /* StartBit Synced 0=bittime, 1=startbit */
1025
1026 /* Register 4: Output Power register */
1027 #define ACT200L_REG4    0x40
1028 #define ACT200L_OP0     0x01 /* Enable LED1C output */
1029 #define ACT200L_OP1     0x02 /* Enable LED2C output */
1030 #define ACT200L_BLKR    0x04
1031
1032 /* Register 5: Receive Mode register */
1033 #define ACT200L_REG5    0x50
1034 #define ACT200L_RWIDL   0x01 /* fixed 1.6us pulse mode */
1035     /*.. other various IRDA bit modes, and TV remote modes..*/
1036
1037 /* Register 6: Receive Sensitivity register #1 */
1038 #define ACT200L_REG6    0x60
1039 #define ACT200L_RS0     0x01 /* receive threshold bit 0 */
1040 #define ACT200L_RS1     0x02 /* receive threshold bit 1 */
1041
1042 /* Register 7: Receive Sensitivity register #2 */
1043 #define ACT200L_REG7    0x70
1044 #define ACT200L_ENPOS   0x04 /* Ignore the falling edge */
1045
1046 /* Register 8,9: Baud Rate Divider register #1,#2 */
1047 #define ACT200L_REG8    0x80
1048 #define ACT200L_REG9    0x90
1049
1050 #define ACT200L_2400    0x5f
1051 #define ACT200L_9600    0x17
1052 #define ACT200L_19200   0x0b
1053 #define ACT200L_38400   0x05
1054 #define ACT200L_57600   0x03
1055 #define ACT200L_115200  0x01
1056
1057 /* Register 13: Control register #3 */
1058 #define ACT200L_REG13   0xd0
1059 #define ACT200L_SHDW    0x01 /* Enable access to shadow registers */
1060
1061 /* Register 15: Status register */
1062 #define ACT200L_REG15   0xf0
1063
1064 /* Register 21: Control register #4 */
1065 #define ACT200L_REG21   0x50
1066 #define ACT200L_EXCK    0x02 /* Disable clock output driver */
1067 #define ACT200L_OSCL    0x04 /* oscillator in low power, medium accuracy mode */
1068
1069 static void init_act200(void)
1070 {
1071         int i;
1072         __u8 control[] = {
1073                 ACT200L_REG15,
1074                 ACT200L_REG13 | ACT200L_SHDW,
1075                 ACT200L_REG21 | ACT200L_EXCK | ACT200L_OSCL,
1076                 ACT200L_REG13,
1077                 ACT200L_REG7  | ACT200L_ENPOS,
1078                 ACT200L_REG6  | ACT200L_RS0  | ACT200L_RS1,
1079                 ACT200L_REG5  | ACT200L_RWIDL,
1080                 ACT200L_REG4  | ACT200L_OP0  | ACT200L_OP1 | ACT200L_BLKR,
1081                 ACT200L_REG3  | ACT200L_B0,
1082                 ACT200L_REG0  | ACT200L_TXEN | ACT200L_RXEN,
1083                 ACT200L_REG8 |  (ACT200L_115200       & 0x0f),
1084                 ACT200L_REG9 | ((ACT200L_115200 >> 4) & 0x0f),
1085                 ACT200L_REG1 | ACT200L_LODB | ACT200L_WIDE
1086         };
1087
1088         /* Set DLAB 1. */
1089         soutp(UART_LCR, UART_LCR_DLAB | UART_LCR_WLEN8);
1090
1091         /* Set divisor to 12 => 9600 Baud */
1092         soutp(UART_DLM, 0);
1093         soutp(UART_DLL, 12);
1094
1095         /* Set DLAB 0. */
1096         soutp(UART_LCR, UART_LCR_WLEN8);
1097         /* Set divisor to 12 => 9600 Baud */
1098
1099         /* power supply */
1100         soutp(UART_MCR, UART_MCR_RTS|UART_MCR_DTR|UART_MCR_OUT2);
1101         for (i = 0; i < 50; i++)
1102                 safe_udelay(1000);
1103
1104                 /* Reset the dongle : set RTS low for 25 ms */
1105         soutp(UART_MCR, UART_MCR_DTR|UART_MCR_OUT2);
1106         for (i = 0; i < 25; i++)
1107                 udelay(1000);
1108
1109         soutp(UART_MCR, UART_MCR_RTS|UART_MCR_DTR|UART_MCR_OUT2);
1110         udelay(100);
1111
1112         /* Clear DTR and set RTS to enter command mode */
1113         soutp(UART_MCR, UART_MCR_RTS|UART_MCR_OUT2);
1114         udelay(7);
1115
1116         /* send out the control register settings for 115K 7N1 SIR operation */
1117         for (i = 0; i < sizeof(control); i++) {
1118                 soutp(UART_TX, control[i]);
1119                 /* one byte takes ~1042 usec to transmit at 9600,8N1 */
1120                 udelay(1500);
1121         }
1122
1123         /* back to normal operation */
1124         soutp(UART_MCR, UART_MCR_RTS|UART_MCR_DTR|UART_MCR_OUT2);
1125         udelay(50);
1126
1127         udelay(1500);
1128         soutp(UART_LCR, sinp(UART_LCR) | UART_LCR_DLAB);
1129
1130         /* Set DLAB 1. */
1131         soutp(UART_LCR, UART_LCR_DLAB | UART_LCR_WLEN7);
1132
1133         /* Set divisor to 1 => 115200 Baud */
1134         soutp(UART_DLM, 0);
1135         soutp(UART_DLL, 1);
1136
1137         /* Set DLAB 0. */
1138         soutp(UART_LCR, sinp(UART_LCR) & (~UART_LCR_DLAB));
1139
1140         /* Set DLAB 0, 7 Bit */
1141         soutp(UART_LCR, UART_LCR_WLEN7);
1142
1143         /* enable interrupts */
1144         soutp(UART_IER, sinp(UART_IER)|UART_IER_RDI);
1145 }
1146 #endif
1147
1148 #ifdef LIRC_SIR_ACTISYS_ACT220L
1149 /*
1150  * Derived from linux IrDA driver (net/irda/actisys.c)
1151  * Drop me a mail for any kind of comment: maxx@spaceboyz.net
1152  */
1153
1154 void init_act220(void)
1155 {
1156         int i;
1157
1158         /* DLAB 1 */
1159         soutp(UART_LCR, UART_LCR_DLAB|UART_LCR_WLEN7);
1160
1161         /* 9600 baud */
1162         soutp(UART_DLM, 0);
1163         soutp(UART_DLL, 12);
1164
1165         /* DLAB 0 */
1166         soutp(UART_LCR, UART_LCR_WLEN7);
1167
1168         /* reset the dongle, set DTR low for 10us */
1169         soutp(UART_MCR, UART_MCR_RTS|UART_MCR_OUT2);
1170         udelay(10);
1171
1172         /* back to normal (still 9600) */
1173         soutp(UART_MCR, UART_MCR_DTR|UART_MCR_RTS|UART_MCR_OUT2);
1174
1175         /*
1176          * send RTS pulses until we reach 115200
1177          * i hope this is really the same for act220l/act220l+
1178          */
1179         for (i = 0; i < 3; i++) {
1180                 udelay(10);
1181                 /* set RTS low for 10 us */
1182                 soutp(UART_MCR, UART_MCR_DTR|UART_MCR_OUT2);
1183                 udelay(10);
1184                 /* set RTS high for 10 us */
1185                 soutp(UART_MCR, UART_MCR_RTS|UART_MCR_DTR|UART_MCR_OUT2);
1186         }
1187
1188         /* back to normal operation */
1189         udelay(1500); /* better safe than sorry ;) */
1190
1191         /* Set DLAB 1. */
1192         soutp(UART_LCR, UART_LCR_DLAB | UART_LCR_WLEN7);
1193
1194         /* Set divisor to 1 => 115200 Baud */
1195         soutp(UART_DLM, 0);
1196         soutp(UART_DLL, 1);
1197
1198         /* Set DLAB 0, 7 Bit */
1199         /* The dongle doesn't seem to have any problems with operation at 7N1 */
1200         soutp(UART_LCR, UART_LCR_WLEN7);
1201
1202         /* enable interrupts */
1203         soutp(UART_IER, UART_IER_RDI);
1204 }
1205 #endif
1206
1207 static int init_lirc_sir(void)
1208 {
1209         int retval;
1210
1211         init_waitqueue_head(&lirc_read_queue);
1212         retval = init_port();
1213         if (retval < 0)
1214                 return retval;
1215         init_hardware();
1216         printk(KERN_INFO LIRC_DRIVER_NAME
1217                 ": Installed.\n");
1218         return 0;
1219 }
1220
1221 static int lirc_sir_probe(struct platform_device *dev)
1222 {
1223         return 0;
1224 }
1225
1226 static int lirc_sir_remove(struct platform_device *dev)
1227 {
1228         return 0;
1229 }
1230
1231 static struct platform_driver lirc_sir_driver = {
1232         .probe          = lirc_sir_probe,
1233         .remove         = lirc_sir_remove,
1234         .driver         = {
1235                 .name   = "lirc_sir",
1236                 .owner  = THIS_MODULE,
1237         },
1238 };
1239
1240 static int __init lirc_sir_init(void)
1241 {
1242         int retval;
1243
1244         retval = platform_driver_register(&lirc_sir_driver);
1245         if (retval) {
1246                 printk(KERN_ERR LIRC_DRIVER_NAME ": Platform driver register "
1247                        "failed!\n");
1248                 return -ENODEV;
1249         }
1250
1251         lirc_sir_dev = platform_device_alloc("lirc_dev", 0);
1252         if (!lirc_sir_dev) {
1253                 printk(KERN_ERR LIRC_DRIVER_NAME ": Platform device alloc "
1254                        "failed!\n");
1255                 retval = -ENOMEM;
1256                 goto pdev_alloc_fail;
1257         }
1258
1259         retval = platform_device_add(lirc_sir_dev);
1260         if (retval) {
1261                 printk(KERN_ERR LIRC_DRIVER_NAME ": Platform device add "
1262                        "failed!\n");
1263                 retval = -ENODEV;
1264                 goto pdev_add_fail;
1265         }
1266
1267         retval = init_chrdev();
1268         if (retval < 0)
1269                 goto fail;
1270
1271         retval = init_lirc_sir();
1272         if (retval) {
1273                 drop_chrdev();
1274                 goto fail;
1275         }
1276
1277         return 0;
1278
1279 fail:
1280         platform_device_del(lirc_sir_dev);
1281 pdev_add_fail:
1282         platform_device_put(lirc_sir_dev);
1283 pdev_alloc_fail:
1284         platform_driver_unregister(&lirc_sir_driver);
1285         return retval;
1286 }
1287
1288 static void __exit lirc_sir_exit(void)
1289 {
1290         drop_hardware();
1291         drop_chrdev();
1292         drop_port();
1293         platform_device_unregister(lirc_sir_dev);
1294         platform_driver_unregister(&lirc_sir_driver);
1295         printk(KERN_INFO LIRC_DRIVER_NAME ": Uninstalled.\n");
1296 }
1297
1298 module_init(lirc_sir_init);
1299 module_exit(lirc_sir_exit);
1300
1301 #ifdef LIRC_SIR_TEKRAM
1302 MODULE_DESCRIPTION("Infrared receiver driver for Tekram Irmate 210");
1303 MODULE_AUTHOR("Christoph Bartelmus");
1304 #elif defined(LIRC_ON_SA1100)
1305 MODULE_DESCRIPTION("LIRC driver for StrongARM SA1100 embedded microprocessor");
1306 MODULE_AUTHOR("Christoph Bartelmus");
1307 #elif defined(LIRC_SIR_ACTISYS_ACT200L)
1308 MODULE_DESCRIPTION("LIRC driver for Actisys Act200L");
1309 MODULE_AUTHOR("Karl Bongers");
1310 #elif defined(LIRC_SIR_ACTISYS_ACT220L)
1311 MODULE_DESCRIPTION("LIRC driver for Actisys Act220L(+)");
1312 MODULE_AUTHOR("Jan Roemisch");
1313 #else
1314 MODULE_DESCRIPTION("Infrared receiver driver for SIR type serial ports");
1315 MODULE_AUTHOR("Milan Pikula");
1316 #endif
1317 MODULE_LICENSE("GPL");
1318
1319 #ifdef LIRC_ON_SA1100
1320 module_param(irq, int, S_IRUGO);
1321 MODULE_PARM_DESC(irq, "Interrupt (16)");
1322 #else
1323 module_param(io, int, S_IRUGO);
1324 MODULE_PARM_DESC(io, "I/O address base (0x3f8 or 0x2f8)");
1325
1326 module_param(irq, int, S_IRUGO);
1327 MODULE_PARM_DESC(irq, "Interrupt (4 or 3)");
1328
1329 module_param(threshold, int, S_IRUGO);
1330 MODULE_PARM_DESC(threshold, "space detection threshold (3)");
1331 #endif
1332
1333 module_param(debug, bool, S_IRUGO | S_IWUSR);
1334 MODULE_PARM_DESC(debug, "Enable debugging messages");