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 <asm/system.h>
  53 #include <linux/io.h>
  54 #include <asm/irq.h>
  55 #include <linux/fcntl.h>
  56 #include <linux/platform_device.h>
  57 #ifdef LIRC_ON_SA1100
  58 #include <asm/hardware.h>
  59 #ifdef CONFIG_SA1100_COLLIE
  60 #include <asm/arch/tc35143.h>
  61 #include <asm/ucb1200.h>
  62 #endif
  63 #endif
  64
  65 #include <linux/timer.h>
  66
  67 #include <media/lirc.h>
  68 #include <media/lirc_dev.h>
  69
  70 /* SECTION: Definitions */
  71
  72 /*** Tekram dongle ***/
  73 #ifdef LIRC_SIR_TEKRAM
  74 /* stolen from kernel source */
  75 /* definitions for Tekram dongle */
  76 #define TEKRAM_115200 0x00
  77 #define TEKRAM_57600  0x01
  78 #define TEKRAM_38400  0x02
  79 #define TEKRAM_19200  0x03
  80 #define TEKRAM_9600   0x04
  81 #define TEKRAM_2400   0x08
  82
  83 #define TEKRAM_PW 0x10 /* Pulse select bit */
  84
  85 /* 10bit * 1s/115200bit in milliseconds = 87ms*/
  86 #define TIME_CONST (10000000ul/115200ul)
  87
  88 #endif
  89
  90 #ifdef LIRC_SIR_ACTISYS_ACT200L
  91 static void init_act200(void);
  92 #elif defined(LIRC_SIR_ACTISYS_ACT220L)
  93 static void init_act220(void);
  94 #endif
  95
  96 /*** SA1100 ***/
  97 #ifdef LIRC_ON_SA1100
  98 struct sa1100_ser2_registers {
  99         /* HSSP control register */
 100         unsigned char hscr0;
 101         /* UART registers */
 102         unsigned char utcr0;
 103         unsigned char utcr1;
 104         unsigned char utcr2;
 105         unsigned char utcr3;
 106         unsigned char utcr4;
 107         unsigned char utdr;
 108         unsigned char utsr0;
 109         unsigned char utsr1;
 110 } sr;
 111
 112 static int irq = IRQ_Ser2ICP;
 113
 114 #define LIRC_ON_SA1100_TRANSMITTER_LATENCY 0
 115
 116 /* pulse/space ratio of 50/50 */
 117 static unsigned long pulse_width = (13-LIRC_ON_SA1100_TRANSMITTER_LATENCY);
 118 /* 1000000/freq-pulse_width */
 119 static unsigned long space_width = (13-LIRC_ON_SA1100_TRANSMITTER_LATENCY);
 120 static unsigned int freq = 38000;      /* modulation frequency */
 121 static unsigned int duty_cycle = 50;   /* duty cycle of 50% */
 122
 123 #endif
 124
 125 #define RBUF_LEN 1024
 126 #define WBUF_LEN 1024
 127
 128 #define LIRC_DRIVER_NAME "lirc_sir"
 129
 130 #define PULSE '['
 131
 132 #ifndef LIRC_SIR_TEKRAM
 133 /* 9bit * 1s/115200bit in milli seconds = 78.125ms*/
 134 #define TIME_CONST (9000000ul/115200ul)
 135 #endif
 136
 137
 138 /* timeout for sequences in jiffies (=5/100s), must be longer than TIME_CONST */
 139 #define SIR_TIMEOUT     (HZ*5/100)
 140
 141 #ifndef LIRC_ON_SA1100
 142 #ifndef LIRC_IRQ
 143 #define LIRC_IRQ 4
 144 #endif
 145 #ifndef LIRC_PORT
 146 /* for external dongles, default to com1 */
 147 #if defined(LIRC_SIR_ACTISYS_ACT200L)         || \
 148             defined(LIRC_SIR_ACTISYS_ACT220L) || \
 149             defined(LIRC_SIR_TEKRAM)
 150 #define LIRC_PORT 0x3f8
 151 #else
 152 /* onboard sir ports are typically com3 */
 153 #define LIRC_PORT 0x3e8
 154 #endif
 155 #endif
 156
 157 static int io = LIRC_PORT;
 158 static int irq = LIRC_IRQ;
 159 static int threshold = 3;
 160 #endif
 161
 162 static DEFINE_SPINLOCK(timer_lock);
 163 static struct timer_list timerlist;
 164 /* time of last signal change detected */
 165 static struct timeval last_tv = {0, 0};
 166 /* time of last UART data ready interrupt */
 167 static struct timeval last_intr_tv = {0, 0};
 168 static int last_value;
 169
 170 static DECLARE_WAIT_QUEUE_HEAD(lirc_read_queue);
 171
 172 static DEFINE_SPINLOCK(hardware_lock);
 173
 174 static int rx_buf[RBUF_LEN];
 175 static unsigned int rx_tail, rx_head;
 176
 177 static int debug;
 178 #define dprintk(fmt, args...)                                           \
 179         do {                                                            \
 180                 if (debug)                                              \
 181                         printk(KERN_DEBUG LIRC_DRIVER_NAME ": "         \
 182                                 fmt, ## args);                          \
 183         } while (0)
 184
 185 /* SECTION: Prototypes */
 186
 187 /* Communication with user-space */
 188 static unsigned int lirc_poll(struct file *file, poll_table *wait);
 189 static ssize_t lirc_read(struct file *file, char *buf, size_t count,
 190                 loff_t *ppos);
 191 static ssize_t lirc_write(struct file *file, const char *buf, size_t n,
 192                 loff_t *pos);
 193 static long lirc_ioctl(struct file *filep, unsigned int cmd, unsigned long arg);
 194 static void add_read_queue(int flag, unsigned long val);
 195 static int init_chrdev(void);
 196 static void drop_chrdev(void);
 197 /* Hardware */
 198 static irqreturn_t sir_interrupt(int irq, void *dev_id);
 199 static void send_space(unsigned long len);
 200 static void send_pulse(unsigned long len);
 201 static int init_hardware(void);
 202 static void drop_hardware(void);
 203 /* Initialisation */
 204 static int init_port(void);
 205 static void drop_port(void);
 206
 207 #ifdef LIRC_ON_SA1100
 208 static void on(void)
 209 {
 210         PPSR |= PPC_TXD2;
 211 }
 212
 213 static void off(void)
 214 {
 215         PPSR &= ~PPC_TXD2;
 216 }
 217 #else
 218 static inline unsigned int sinp(int offset)
 219 {
 220         return inb(io + offset);
 221 }
 222
 223 static inline void soutp(int offset, int value)
 224 {
 225         outb(value, io + offset);
 226 }
 227 #endif
 228
 229 #ifndef MAX_UDELAY_MS
 230 #define MAX_UDELAY_US 5000
 231 #else
 232 #define MAX_UDELAY_US (MAX_UDELAY_MS*1000)
 233 #endif
 234
 235 static void safe_udelay(unsigned long usecs)
 236 {
 237         while (usecs > MAX_UDELAY_US) {
 238                 udelay(MAX_UDELAY_US);
 239                 usecs -= MAX_UDELAY_US;
 240         }
 241         udelay(usecs);
 242 }
 243
 244 /* SECTION: Communication with user-space */
 245
 246 static unsigned int lirc_poll(struct file *file, poll_table *wait)
 247 {
 248         poll_wait(file, &lirc_read_queue, wait);
 249         if (rx_head != rx_tail)
 250                 return POLLIN | POLLRDNORM;
 251         return 0;
 252 }
 253
 254 static ssize_t lirc_read(struct file *file, char *buf, size_t count,
 255                 loff_t *ppos)
 256 {
 257         int n = 0;
 258         int retval = 0;
 259         DECLARE_WAITQUEUE(wait, current);
 260
 261         if (count % sizeof(int))
 262                 return -EINVAL;
 263
 264         add_wait_queue(&lirc_read_queue, &wait);
 265         set_current_state(TASK_INTERRUPTIBLE);
 266         while (n < count) {
 267                 if (rx_head != rx_tail) {
 268                         if (copy_to_user((void *) buf + n,
 269                                         (void *) (rx_buf + rx_head),
 270                                         sizeof(int))) {
 271                                 retval = -EFAULT;
 272                                 break;
 273                         }
 274                         rx_head = (rx_head + 1) & (RBUF_LEN - 1);
 275                         n += sizeof(int);
 276                 } else {
 277                         if (file->f_flags & O_NONBLOCK) {
 278                                 retval = -EAGAIN;
 279                                 break;
 280                         }
 281                         if (signal_pending(current)) {
 282                                 retval = -ERESTARTSYS;
 283                                 break;
 284                         }
 285                         schedule();
 286                         set_current_state(TASK_INTERRUPTIBLE);
 287                 }
 288         }
 289         remove_wait_queue(&lirc_read_queue, &wait);
 290         set_current_state(TASK_RUNNING);
 291         return n ? n : retval;
 292 }
 293 static ssize_t lirc_write(struct file *file, const char *buf, size_t n,
 294                                 loff_t *pos)
 295 {
 296         unsigned long flags;
 297         int i, count;
 298         int *tx_buf;
 299
 300         count = n / sizeof(int);
 301         if (n % sizeof(int) || count % 2 == 0)
 302                 return -EINVAL;
 303         tx_buf = memdup_user(buf, n);
 304         if (IS_ERR(tx_buf))
 305                 return PTR_ERR(tx_buf);
 306         i = 0;
 307 #ifdef LIRC_ON_SA1100
 308         /* disable receiver */
 309         Ser2UTCR3 = 0;
 310 #endif
 311         local_irq_save(flags);
 312         while (1) {
 313                 if (i >= count)
 314                         break;
 315                 if (tx_buf[i])
 316                         send_pulse(tx_buf[i]);
 317                 i++;
 318                 if (i >= count)
 319                         break;
 320                 if (tx_buf[i])
 321                         send_space(tx_buf[i]);
 322                 i++;
 323         }
 324         local_irq_restore(flags);
 325 #ifdef LIRC_ON_SA1100
 326         off();
 327         udelay(1000); /* wait 1ms for IR diode to recover */
 328         Ser2UTCR3 = 0;
 329         /* clear status register to prevent unwanted interrupts */
 330         Ser2UTSR0 &= (UTSR0_RID | UTSR0_RBB | UTSR0_REB);
 331         /* enable receiver */
 332         Ser2UTCR3 = UTCR3_RXE|UTCR3_RIE;
 333 #endif
 334         kfree(tx_buf);
 335         return count;
 336 }
 337
 338 static long lirc_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
 339 {
 340         int retval = 0;
 341         __u32 value = 0;
 342 #ifdef LIRC_ON_SA1100
 343
 344         if (cmd == LIRC_GET_FEATURES)
 345                 value = LIRC_CAN_SEND_PULSE |
 346                         LIRC_CAN_SET_SEND_DUTY_CYCLE |
 347                         LIRC_CAN_SET_SEND_CARRIER |
 348                         LIRC_CAN_REC_MODE2;
 349         else if (cmd == LIRC_GET_SEND_MODE)
 350                 value = LIRC_MODE_PULSE;
 351         else if (cmd == LIRC_GET_REC_MODE)
 352                 value = LIRC_MODE_MODE2;
 353 #else
 354         if (cmd == LIRC_GET_FEATURES)
 355                 value = LIRC_CAN_SEND_PULSE | LIRC_CAN_REC_MODE2;
 356         else if (cmd == LIRC_GET_SEND_MODE)
 357                 value = LIRC_MODE_PULSE;
 358         else if (cmd == LIRC_GET_REC_MODE)
 359                 value = LIRC_MODE_MODE2;
 360 #endif
 361
 362         switch (cmd) {
 363         case LIRC_GET_FEATURES:
 364         case LIRC_GET_SEND_MODE:
 365         case LIRC_GET_REC_MODE:
 366                 retval = put_user(value, (__u32 *) arg);
 367                 break;
 368
 369         case LIRC_SET_SEND_MODE:
 370         case LIRC_SET_REC_MODE:
 371                 retval = get_user(value, (__u32 *) arg);
 372                 break;
 373 #ifdef LIRC_ON_SA1100
 374         case LIRC_SET_SEND_DUTY_CYCLE:
 375                 retval = get_user(value, (__u32 *) arg);
 376                 if (retval)
 377                         return retval;
 378                 if (value <= 0 || value > 100)
 379                         return -EINVAL;
 380                 /* (value/100)*(1000000/freq) */
 381                 duty_cycle = value;
 382                 pulse_width = (unsigned long) duty_cycle*10000/freq;
 383                 space_width = (unsigned long) 1000000L/freq-pulse_width;
 384                 if (pulse_width >= LIRC_ON_SA1100_TRANSMITTER_LATENCY)
 385                         pulse_width -= LIRC_ON_SA1100_TRANSMITTER_LATENCY;
 386                 if (space_width >= LIRC_ON_SA1100_TRANSMITTER_LATENCY)
 387                         space_width -= LIRC_ON_SA1100_TRANSMITTER_LATENCY;
 388                 break;
 389         case LIRC_SET_SEND_CARRIER:
 390                 retval = get_user(value, (__u32 *) arg);
 391                 if (retval)
 392                         return retval;
 393                 if (value > 500000 || value < 20000)
 394                         return -EINVAL;
 395                 freq = value;
 396                 pulse_width = (unsigned long) duty_cycle*10000/freq;
 397                 space_width = (unsigned long) 1000000L/freq-pulse_width;
 398                 if (pulse_width >= LIRC_ON_SA1100_TRANSMITTER_LATENCY)
 399                         pulse_width -= LIRC_ON_SA1100_TRANSMITTER_LATENCY;
 400                 if (space_width >= LIRC_ON_SA1100_TRANSMITTER_LATENCY)
 401                         space_width -= LIRC_ON_SA1100_TRANSMITTER_LATENCY;
 402                 break;
 403 #endif
 404         default:
 405                 retval = -ENOIOCTLCMD;
 406
 407         }
 408
 409         if (retval)
 410                 return retval;
 411         if (cmd == LIRC_SET_REC_MODE) {
 412                 if (value != LIRC_MODE_MODE2)
 413                         retval = -ENOSYS;
 414         } else if (cmd == LIRC_SET_SEND_MODE) {
 415                 if (value != LIRC_MODE_PULSE)
 416                         retval = -ENOSYS;
 417         }
 418
 419         return retval;
 420 }
 421
 422 static void add_read_queue(int flag, unsigned long val)
 423 {
 424         unsigned int new_rx_tail;
 425         int newval;
 426
 427         dprintk("add flag %d with val %lu\n", flag, val);
 428
 429         newval = val & PULSE_MASK;
 430
 431         /*
 432          * statistically, pulses are ~TIME_CONST/2 too long. we could
 433          * maybe make this more exact, but this is good enough
 434          */
 435         if (flag) {
 436                 /* pulse */
 437                 if (newval > TIME_CONST/2)
 438                         newval -= TIME_CONST/2;
 439                 else /* should not ever happen */
 440                         newval = 1;
 441                 newval |= PULSE_BIT;
 442         } else {
 443                 newval += TIME_CONST/2;
 444         }
 445         new_rx_tail = (rx_tail + 1) & (RBUF_LEN - 1);
 446         if (new_rx_tail == rx_head) {
 447                 dprintk("Buffer overrun.\n");
 448                 return;
 449         }
 450         rx_buf[rx_tail] = newval;
 451         rx_tail = new_rx_tail;
 452         wake_up_interruptible(&lirc_read_queue);
 453 }
 454
 455 static const struct file_operations lirc_fops = {
 456         .owner          = THIS_MODULE,
 457         .read           = lirc_read,
 458         .write          = lirc_write,
 459         .poll           = lirc_poll,
 460         .unlocked_ioctl = lirc_ioctl,
 461 #ifdef CONFIG_COMPAT
 462         .compat_ioctl   = lirc_ioctl,
 463 #endif
 464         .open           = lirc_dev_fop_open,
 465         .release        = lirc_dev_fop_close,
 466         .llseek         = no_llseek,
 467 };
 468
 469 static int set_use_inc(void *data)
 470 {
 471         return 0;
 472 }
 473
 474 static void set_use_dec(void *data)
 475 {
 476 }
 477
 478 static struct lirc_driver driver = {
 479         .name           = LIRC_DRIVER_NAME,
 480         .minor          = -1,
 481         .code_length    = 1,
 482         .sample_rate    = 0,
 483         .data           = NULL,
 484         .add_to_buf     = NULL,
 485         .set_use_inc    = set_use_inc,
 486         .set_use_dec    = set_use_dec,
 487         .fops           = &lirc_fops,
 488         .dev            = NULL,
 489         .owner          = THIS_MODULE,
 490 };
 491
 492 static struct platform_device *lirc_sir_dev;
 493
 494 static int init_chrdev(void)
 495 {
 496         driver.dev = &lirc_sir_dev->dev;
 497         driver.minor = lirc_register_driver(&driver);
 498         if (driver.minor < 0) {
 499                 printk(KERN_ERR LIRC_DRIVER_NAME ": init_chrdev() failed.\n");
 500                 return -EIO;
 501         }
 502         return 0;
 503 }
 504
 505 static void drop_chrdev(void)
 506 {
 507         lirc_unregister_driver(driver.minor);
 508 }
 509
 510 /* SECTION: Hardware */
 511 static long delta(struct timeval *tv1, struct timeval *tv2)
 512 {
 513         unsigned long deltv;
 514
 515         deltv = tv2->tv_sec - tv1->tv_sec;
 516         if (deltv > 15)
 517                 deltv = 0xFFFFFF;
 518         else
 519                 deltv = deltv*1000000 +
 520                         tv2->tv_usec -
 521                         tv1->tv_usec;
 522         return deltv;
 523 }
 524
 525 static void sir_timeout(unsigned long data)
 526 {
 527         /*
 528          * if last received signal was a pulse, but receiving stopped
 529          * within the 9 bit frame, we need to finish this pulse and
 530          * simulate a signal change to from pulse to space. Otherwise
 531          * upper layers will receive two sequences next time.
 532          */
 533
 534         unsigned long flags;
 535         unsigned long pulse_end;
 536
 537         /* avoid interference with interrupt */
 538         spin_lock_irqsave(&timer_lock, flags);
 539         if (last_value) {
 540 #ifndef LIRC_ON_SA1100
 541                 /* clear unread bits in UART and restart */
 542                 outb(UART_FCR_CLEAR_RCVR, io + UART_FCR);
 543 #endif
 544                 /* determine 'virtual' pulse end: */
 545                 pulse_end = delta(&last_tv, &last_intr_tv);
 546                 dprintk("timeout add %d for %lu usec\n", last_value, pulse_end);
 547                 add_read_queue(last_value, pulse_end);
 548                 last_value = 0;
 549                 last_tv = last_intr_tv;
 550         }
 551         spin_unlock_irqrestore(&timer_lock, flags);
 552 }
 553
 554 static irqreturn_t sir_interrupt(int irq, void *dev_id)
 555 {
 556         unsigned char data;
 557         struct timeval curr_tv;
 558         static unsigned long deltv;
 559 #ifdef LIRC_ON_SA1100
 560         int status;
 561         static int n;
 562
 563         status = Ser2UTSR0;
 564         /*
 565          * Deal with any receive errors first.  The bytes in error may be
 566          * the only bytes in the receive FIFO, so we do this first.
 567          */
 568         while (status & UTSR0_EIF) {
 569                 int bstat;
 570
 571                 if (debug) {
 572                         dprintk("EIF\n");
 573                         bstat = Ser2UTSR1;
 574
 575                         if (bstat & UTSR1_FRE)
 576                                 dprintk("frame error\n");
 577                         if (bstat & UTSR1_ROR)
 578                                 dprintk("receive fifo overrun\n");
 579                         if (bstat & UTSR1_PRE)
 580                                 dprintk("parity error\n");
 581                 }
 582
 583                 bstat = Ser2UTDR;
 584                 n++;
 585                 status = Ser2UTSR0;
 586         }
 587
 588         if (status & (UTSR0_RFS | UTSR0_RID)) {
 589                 do_gettimeofday(&curr_tv);
 590                 deltv = delta(&last_tv, &curr_tv);
 591                 do {
 592                         data = Ser2UTDR;
 593                         dprintk("%d data: %u\n", n, (unsigned int) data);
 594                         n++;
 595                 } while (status & UTSR0_RID && /* do not empty fifo in order to
 596                                                 * get UTSR0_RID in any case */
 597                       Ser2UTSR1 & UTSR1_RNE); /* data ready */
 598
 599                 if (status&UTSR0_RID) {
 600                         add_read_queue(0 , deltv - n * TIME_CONST); /*space*/
 601                         add_read_queue(1, n * TIME_CONST); /*pulse*/
 602                         n = 0;
 603                         last_tv = curr_tv;
 604                 }
 605         }
 606
 607         if (status & UTSR0_TFS)
 608                 printk(KERN_ERR "transmit fifo not full, shouldn't happen\n");
 609
 610         /* We must clear certain bits. */
 611         status &= (UTSR0_RID | UTSR0_RBB | UTSR0_REB);
 612         if (status)
 613                 Ser2UTSR0 = status;
 614 #else
 615         unsigned long deltintrtv;
 616         unsigned long flags;
 617         int iir, lsr;
 618
 619         while ((iir = inb(io + UART_IIR) & UART_IIR_ID)) {
 620                 switch (iir&UART_IIR_ID) { /* FIXME toto treba preriedit */
 621                 case UART_IIR_MSI:
 622                         (void) inb(io + UART_MSR);
 623                         break;
 624                 case UART_IIR_RLSI:
 625                         (void) inb(io + UART_LSR);
 626                         break;
 627                 case UART_IIR_THRI:
 628 #if 0
 629                         if (lsr & UART_LSR_THRE) /* FIFO is empty */
 630                                 outb(data, io + UART_TX)
 631 #endif
 632                         break;
 633                 case UART_IIR_RDI:
 634                         /* avoid interference with timer */
 635                         spin_lock_irqsave(&timer_lock, flags);
 636                         do {
 637                                 del_timer(&timerlist);
 638                                 data = inb(io + UART_RX);
 639                                 do_gettimeofday(&curr_tv);
 640                                 deltv = delta(&last_tv, &curr_tv);
 641                                 deltintrtv = delta(&last_intr_tv, &curr_tv);
 642                                 dprintk("t %lu, d %d\n", deltintrtv, (int)data);
 643                                 /*
 644                                  * if nothing came in last X cycles,
 645                                  * it was gap
 646                                  */
 647                                 if (deltintrtv > TIME_CONST * threshold) {
 648                                         if (last_value) {
 649                                                 dprintk("GAP\n");
 650                                                 /* simulate signal change */
 651                                                 add_read_queue(last_value,
 652                                                                deltv -
 653                                                                deltintrtv);
 654                                                 last_value = 0;
 655                                                 last_tv.tv_sec =
 656                                                         last_intr_tv.tv_sec;
 657                                                 last_tv.tv_usec =
 658                                                         last_intr_tv.tv_usec;
 659                                                 deltv = deltintrtv;
 660                                         }
 661                                 }
 662                                 data = 1;
 663                                 if (data ^ last_value) {
 664                                         /*
 665                                          * deltintrtv > 2*TIME_CONST, remember?
 666                                          * the other case is timeout
 667                                          */
 668                                         add_read_queue(last_value,
 669                                                        deltv-TIME_CONST);
 670                                         last_value = data;
 671                                         last_tv = curr_tv;
 672                                         if (last_tv.tv_usec >= TIME_CONST) {
 673                                                 last_tv.tv_usec -= TIME_CONST;
 674                                         } else {
 675                                                 last_tv.tv_sec--;
 676                                                 last_tv.tv_usec += 1000000 -
 677                                                         TIME_CONST;
 678                                         }
 679                                 }
 680                                 last_intr_tv = curr_tv;
 681                                 if (data) {
 682                                         /*
 683                                          * start timer for end of
 684                                          * sequence detection
 685                                          */
 686                                         timerlist.expires = jiffies +
 687                                                                 SIR_TIMEOUT;
 688                                         add_timer(&timerlist);
 689                                 }
 690
 691                                 lsr = inb(io + UART_LSR);
 692                         } while (lsr & UART_LSR_DR); /* data ready */
 693                         spin_unlock_irqrestore(&timer_lock, flags);
 694                         break;
 695                 default:
 696                         break;
 697                 }
 698         }
 699 #endif
 700         return IRQ_RETVAL(IRQ_HANDLED);
 701 }
 702
 703 #ifdef LIRC_ON_SA1100
 704 static void send_pulse(unsigned long length)
 705 {
 706         unsigned long k, delay;
 707         int flag;
 708
 709         if (length == 0)
 710                 return;
 711         /*
 712          * this won't give us the carrier frequency we really want
 713          * due to integer arithmetic, but we can accept this inaccuracy
 714          */
 715
 716         for (k = flag = 0; k < length; k += delay, flag = !flag) {
 717                 if (flag) {
 718                         off();
 719                         delay = space_width;
 720                 } else {
 721                         on();
 722                         delay = pulse_width;
 723                 }
 724                 safe_udelay(delay);
 725         }
 726         off();
 727 }
 728
 729 static void send_space(unsigned long length)
 730 {
 731         if (length == 0)
 732                 return;
 733         off();
 734         safe_udelay(length);
 735 }
 736 #else
 737 static void send_space(unsigned long len)
 738 {
 739         safe_udelay(len);
 740 }
 741
 742 static void send_pulse(unsigned long len)
 743 {
 744         long bytes_out = len / TIME_CONST;
 745
 746         if (bytes_out == 0)
 747                 bytes_out++;
 748
 749         while (bytes_out--) {
 750                 outb(PULSE, io + UART_TX);
 751                 /* FIXME treba seriozne cakanie z char/serial.c */
 752                 while (!(inb(io + UART_LSR) & UART_LSR_THRE))
 753                         ;
 754         }
 755 }
 756 #endif
 757
 758 #ifdef CONFIG_SA1100_COLLIE
 759 static int sa1100_irda_set_power_collie(int state)
 760 {
 761         if (state) {
 762                 /*
 763                  *  0 - off
 764                  *  1 - short range, lowest power
 765                  *  2 - medium range, medium power
 766                  *  3 - maximum range, high power
 767                  */
 768                 ucb1200_set_io_direction(TC35143_GPIO_IR_ON,
 769                                          TC35143_IODIR_OUTPUT);
 770                 ucb1200_set_io(TC35143_GPIO_IR_ON, TC35143_IODAT_LOW);
 771                 udelay(100);
 772         } else {
 773                 /* OFF */
 774                 ucb1200_set_io_direction(TC35143_GPIO_IR_ON,
 775                                          TC35143_IODIR_OUTPUT);
 776                 ucb1200_set_io(TC35143_GPIO_IR_ON, TC35143_IODAT_HIGH);
 777         }
 778         return 0;
 779 }
 780 #endif
 781
 782 static int init_hardware(void)
 783 {
 784         unsigned long flags;
 785
 786         spin_lock_irqsave(&hardware_lock, flags);
 787         /* reset UART */
 788 #ifdef LIRC_ON_SA1100
 789 #ifdef CONFIG_SA1100_BITSY
 790         if (machine_is_bitsy()) {
 791                 printk(KERN_INFO "Power on IR module\n");
 792                 set_bitsy_egpio(EGPIO_BITSY_IR_ON);
 793         }
 794 #endif
 795 #ifdef CONFIG_SA1100_COLLIE
 796         sa1100_irda_set_power_collie(3);        /* power on */
 797 #endif
 798         sr.hscr0 = Ser2HSCR0;
 799
 800         sr.utcr0 = Ser2UTCR0;
 801         sr.utcr1 = Ser2UTCR1;
 802         sr.utcr2 = Ser2UTCR2;
 803         sr.utcr3 = Ser2UTCR3;
 804         sr.utcr4 = Ser2UTCR4;
 805
 806         sr.utdr = Ser2UTDR;
 807         sr.utsr0 = Ser2UTSR0;
 808         sr.utsr1 = Ser2UTSR1;
 809
 810         /* configure GPIO */
 811         /* output */
 812         PPDR |= PPC_TXD2;
 813         PSDR |= PPC_TXD2;
 814         /* set output to 0 */
 815         off();
 816
 817         /* Enable HP-SIR modulation, and ensure that the port is disabled. */
 818         Ser2UTCR3 = 0;
 819         Ser2HSCR0 = sr.hscr0 & (~HSCR0_HSSP);
 820
 821         /* clear status register to prevent unwanted interrupts */
 822         Ser2UTSR0 &= (UTSR0_RID | UTSR0_RBB | UTSR0_REB);
 823
 824         /* 7N1 */
 825         Ser2UTCR0 = UTCR0_1StpBit|UTCR0_7BitData;
 826         /* 115200 */
 827         Ser2UTCR1 = 0;
 828         Ser2UTCR2 = 1;
 829         /* use HPSIR, 1.6 usec pulses */
 830         Ser2UTCR4 = UTCR4_HPSIR|UTCR4_Z1_6us;
 831
 832         /* enable receiver, receive fifo interrupt */
 833         Ser2UTCR3 = UTCR3_RXE|UTCR3_RIE;
 834
 835         /* clear status register to prevent unwanted interrupts */
 836         Ser2UTSR0 &= (UTSR0_RID | UTSR0_RBB | UTSR0_REB);
 837
 838 #elif defined(LIRC_SIR_TEKRAM)
 839         /* disable FIFO */
 840         soutp(UART_FCR,
 841               UART_FCR_CLEAR_RCVR|
 842               UART_FCR_CLEAR_XMIT|
 843               UART_FCR_TRIGGER_1);
 844
 845         /* Set DLAB 0. */
 846         soutp(UART_LCR, sinp(UART_LCR) & (~UART_LCR_DLAB));
 847
 848         /* First of all, disable all interrupts */
 849         soutp(UART_IER, sinp(UART_IER) &
 850               (~(UART_IER_MSI|UART_IER_RLSI|UART_IER_THRI|UART_IER_RDI)));
 851
 852         /* Set DLAB 1. */
 853         soutp(UART_LCR, sinp(UART_LCR) | UART_LCR_DLAB);
 854
 855         /* Set divisor to 12 => 9600 Baud */
 856         soutp(UART_DLM, 0);
 857         soutp(UART_DLL, 12);
 858
 859         /* Set DLAB 0. */
 860         soutp(UART_LCR, sinp(UART_LCR) & (~UART_LCR_DLAB));
 861
 862         /* power supply */
 863         soutp(UART_MCR, UART_MCR_RTS|UART_MCR_DTR|UART_MCR_OUT2);
 864         safe_udelay(50*1000);
 865
 866         /* -DTR low -> reset PIC */
 867         soutp(UART_MCR, UART_MCR_RTS|UART_MCR_OUT2);
 868         udelay(1*1000);
 869
 870         soutp(UART_MCR, UART_MCR_RTS|UART_MCR_DTR|UART_MCR_OUT2);
 871         udelay(100);
 872
 873
 874         /* -RTS low -> send control byte */
 875         soutp(UART_MCR, UART_MCR_DTR|UART_MCR_OUT2);
 876         udelay(7);
 877         soutp(UART_TX, TEKRAM_115200|TEKRAM_PW);
 878
 879         /* one byte takes ~1042 usec to transmit at 9600,8N1 */
 880         udelay(1500);
 881
 882         /* back to normal operation */
 883         soutp(UART_MCR, UART_MCR_RTS|UART_MCR_DTR|UART_MCR_OUT2);
 884         udelay(50);
 885
 886         udelay(1500);
 887
 888         /* read previous control byte */
 889         printk(KERN_INFO LIRC_DRIVER_NAME
 890                ": 0x%02x\n", sinp(UART_RX));
 891
 892         /* Set DLAB 1. */
 893         soutp(UART_LCR, sinp(UART_LCR) | UART_LCR_DLAB);
 894
 895         /* Set divisor to 1 => 115200 Baud */
 896         soutp(UART_DLM, 0);
 897         soutp(UART_DLL, 1);
 898
 899         /* Set DLAB 0, 8 Bit */
 900         soutp(UART_LCR, UART_LCR_WLEN8);
 901         /* enable interrupts */
 902         soutp(UART_IER, sinp(UART_IER)|UART_IER_RDI);
 903 #else
 904         outb(0, io + UART_MCR);
 905         outb(0, io + UART_IER);
 906         /* init UART */
 907         /* set DLAB, speed = 115200 */
 908         outb(UART_LCR_DLAB | UART_LCR_WLEN7, io + UART_LCR);
 909         outb(1, io + UART_DLL); outb(0, io + UART_DLM);
 910         /* 7N1+start = 9 bits at 115200 ~ 3 bits at 44000 */
 911         outb(UART_LCR_WLEN7, io + UART_LCR);
 912         /* FIFO operation */
 913         outb(UART_FCR_ENABLE_FIFO, io + UART_FCR);
 914         /* interrupts */
 915         /* outb(UART_IER_RLSI|UART_IER_RDI|UART_IER_THRI, io + UART_IER); */
 916         outb(UART_IER_RDI, io + UART_IER);
 917         /* turn on UART */
 918         outb(UART_MCR_DTR|UART_MCR_RTS|UART_MCR_OUT2, io + UART_MCR);
 919 #ifdef LIRC_SIR_ACTISYS_ACT200L
 920         init_act200();
 921 #elif defined(LIRC_SIR_ACTISYS_ACT220L)
 922         init_act220();
 923 #endif
 924 #endif
 925         spin_unlock_irqrestore(&hardware_lock, flags);
 926         return 0;
 927 }
 928
 929 static void drop_hardware(void)
 930 {
 931         unsigned long flags;
 932
 933         spin_lock_irqsave(&hardware_lock, flags);
 934
 935 #ifdef LIRC_ON_SA1100
 936         Ser2UTCR3 = 0;
 937
 938         Ser2UTCR0 = sr.utcr0;
 939         Ser2UTCR1 = sr.utcr1;
 940         Ser2UTCR2 = sr.utcr2;
 941         Ser2UTCR4 = sr.utcr4;
 942         Ser2UTCR3 = sr.utcr3;
 943
 944         Ser2HSCR0 = sr.hscr0;
 945 #ifdef CONFIG_SA1100_BITSY
 946         if (machine_is_bitsy())
 947                 clr_bitsy_egpio(EGPIO_BITSY_IR_ON);
 948 #endif
 949 #ifdef CONFIG_SA1100_COLLIE
 950         sa1100_irda_set_power_collie(0);        /* power off */
 951 #endif
 952 #else
 953         /* turn off interrupts */
 954         outb(0, io + UART_IER);
 955 #endif
 956         spin_unlock_irqrestore(&hardware_lock, flags);
 957 }
 958
 959 /* SECTION: Initialisation */
 960
 961 static int init_port(void)
 962 {
 963         int retval;
 964
 965         /* get I/O port access and IRQ line */
 966 #ifndef LIRC_ON_SA1100
 967         if (request_region(io, 8, LIRC_DRIVER_NAME) == NULL) {
 968                 printk(KERN_ERR LIRC_DRIVER_NAME
 969                        ": i/o port 0x%.4x already in use.\n", io);
 970                 return -EBUSY;
 971         }
 972 #endif
 973         retval = request_irq(irq, sir_interrupt, 0,
 974                              LIRC_DRIVER_NAME, NULL);
 975         if (retval < 0) {
 976 #               ifndef LIRC_ON_SA1100
 977                 release_region(io, 8);
 978 #               endif
 979                 printk(KERN_ERR LIRC_DRIVER_NAME
 980                         ": IRQ %d already in use.\n",
 981                         irq);
 982                 return retval;
 983         }
 984 #ifndef LIRC_ON_SA1100
 985         printk(KERN_INFO LIRC_DRIVER_NAME
 986                 ": I/O port 0x%.4x, IRQ %d.\n",
 987                 io, irq);
 988 #endif
 989
 990         init_timer(&timerlist);
 991         timerlist.function = sir_timeout;
 992         timerlist.data = 0xabadcafe;
 993
 994         return 0;
 995 }
 996
 997 static void drop_port(void)
 998 {
 999         free_irq(irq, NULL);
1000         del_timer_sync(&timerlist);
1001 #ifndef LIRC_ON_SA1100
1002         release_region(io, 8);
1003 #endif
1004 }
1005
1006 #ifdef LIRC_SIR_ACTISYS_ACT200L
1007 /* Crystal/Cirrus CS8130 IR transceiver, used in Actisys Act200L dongle */
1008 /* some code borrowed from Linux IRDA driver */
1009
1010 /* Register 0: Control register #1 */
1011 #define ACT200L_REG0    0x00
1012 #define ACT200L_TXEN    0x01 /* Enable transmitter */
1013 #define ACT200L_RXEN    0x02 /* Enable receiver */
1014 #define ACT200L_ECHO    0x08 /* Echo control chars */
1015
1016 /* Register 1: Control register #2 */
1017 #define ACT200L_REG1    0x10
1018 #define ACT200L_LODB    0x01 /* Load new baud rate count value */
1019 #define ACT200L_WIDE    0x04 /* Expand the maximum allowable pulse */
1020
1021 /* Register 3: Transmit mode register #2 */
1022 #define ACT200L_REG3    0x30
1023 #define ACT200L_B0      0x01 /* DataBits, 0=6, 1=7, 2=8, 3=9(8P)  */
1024 #define ACT200L_B1      0x02 /* DataBits, 0=6, 1=7, 2=8, 3=9(8P)  */
1025 #define ACT200L_CHSY    0x04 /* StartBit Synced 0=bittime, 1=startbit */
1026
1027 /* Register 4: Output Power register */
1028 #define ACT200L_REG4    0x40
1029 #define ACT200L_OP0     0x01 /* Enable LED1C output */
1030 #define ACT200L_OP1     0x02 /* Enable LED2C output */
1031 #define ACT200L_BLKR    0x04
1032
1033 /* Register 5: Receive Mode register */
1034 #define ACT200L_REG5    0x50
1035 #define ACT200L_RWIDL   0x01 /* fixed 1.6us pulse mode */
1036     /*.. other various IRDA bit modes, and TV remote modes..*/
1037
1038 /* Register 6: Receive Sensitivity register #1 */
1039 #define ACT200L_REG6    0x60
1040 #define ACT200L_RS0     0x01 /* receive threshold bit 0 */
1041 #define ACT200L_RS1     0x02 /* receive threshold bit 1 */
1042
1043 /* Register 7: Receive Sensitivity register #2 */
1044 #define ACT200L_REG7    0x70
1045 #define ACT200L_ENPOS   0x04 /* Ignore the falling edge */
1046
1047 /* Register 8,9: Baud Rate Divider register #1,#2 */
1048 #define ACT200L_REG8    0x80
1049 #define ACT200L_REG9    0x90
1050
1051 #define ACT200L_2400    0x5f
1052 #define ACT200L_9600    0x17
1053 #define ACT200L_19200   0x0b
1054 #define ACT200L_38400   0x05
1055 #define ACT200L_57600   0x03
1056 #define ACT200L_115200  0x01
1057
1058 /* Register 13: Control register #3 */
1059 #define ACT200L_REG13   0xd0
1060 #define ACT200L_SHDW    0x01 /* Enable access to shadow registers */
1061
1062 /* Register 15: Status register */
1063 #define ACT200L_REG15   0xf0
1064
1065 /* Register 21: Control register #4 */
1066 #define ACT200L_REG21   0x50
1067 #define ACT200L_EXCK    0x02 /* Disable clock output driver */
1068 #define ACT200L_OSCL    0x04 /* oscillator in low power, medium accuracy mode */
1069
1070 static void init_act200(void)
1071 {
1072         int i;
1073         __u8 control[] = {
1074                 ACT200L_REG15,
1075                 ACT200L_REG13 | ACT200L_SHDW,
1076                 ACT200L_REG21 | ACT200L_EXCK | ACT200L_OSCL,
1077                 ACT200L_REG13,
1078                 ACT200L_REG7  | ACT200L_ENPOS,
1079                 ACT200L_REG6  | ACT200L_RS0  | ACT200L_RS1,
1080                 ACT200L_REG5  | ACT200L_RWIDL,
1081                 ACT200L_REG4  | ACT200L_OP0  | ACT200L_OP1 | ACT200L_BLKR,
1082                 ACT200L_REG3  | ACT200L_B0,
1083                 ACT200L_REG0  | ACT200L_TXEN | ACT200L_RXEN,
1084                 ACT200L_REG8 |  (ACT200L_115200       & 0x0f),
1085                 ACT200L_REG9 | ((ACT200L_115200 >> 4) & 0x0f),
1086                 ACT200L_REG1 | ACT200L_LODB | ACT200L_WIDE
1087         };
1088
1089         /* Set DLAB 1. */
1090         soutp(UART_LCR, UART_LCR_DLAB | UART_LCR_WLEN8);
1091
1092         /* Set divisor to 12 => 9600 Baud */
1093         soutp(UART_DLM, 0);
1094         soutp(UART_DLL, 12);
1095
1096         /* Set DLAB 0. */
1097         soutp(UART_LCR, UART_LCR_WLEN8);
1098         /* Set divisor to 12 => 9600 Baud */
1099
1100         /* power supply */
1101         soutp(UART_MCR, UART_MCR_RTS|UART_MCR_DTR|UART_MCR_OUT2);
1102         for (i = 0; i < 50; i++)
1103                 safe_udelay(1000);
1104
1105                 /* Reset the dongle : set RTS low for 25 ms */
1106         soutp(UART_MCR, UART_MCR_DTR|UART_MCR_OUT2);
1107         for (i = 0; i < 25; i++)
1108                 udelay(1000);
1109
1110         soutp(UART_MCR, UART_MCR_RTS|UART_MCR_DTR|UART_MCR_OUT2);
1111         udelay(100);
1112
1113         /* Clear DTR and set RTS to enter command mode */
1114         soutp(UART_MCR, UART_MCR_RTS|UART_MCR_OUT2);
1115         udelay(7);
1116
1117         /* send out the control register settings for 115K 7N1 SIR operation */
1118         for (i = 0; i < sizeof(control); i++) {
1119                 soutp(UART_TX, control[i]);
1120                 /* one byte takes ~1042 usec to transmit at 9600,8N1 */
1121                 udelay(1500);
1122         }
1123
1124         /* back to normal operation */
1125         soutp(UART_MCR, UART_MCR_RTS|UART_MCR_DTR|UART_MCR_OUT2);
1126         udelay(50);
1127
1128         udelay(1500);
1129         soutp(UART_LCR, sinp(UART_LCR) | UART_LCR_DLAB);
1130
1131         /* Set DLAB 1. */
1132         soutp(UART_LCR, UART_LCR_DLAB | UART_LCR_WLEN7);
1133
1134         /* Set divisor to 1 => 115200 Baud */
1135         soutp(UART_DLM, 0);
1136         soutp(UART_DLL, 1);
1137
1138         /* Set DLAB 0. */
1139         soutp(UART_LCR, sinp(UART_LCR) & (~UART_LCR_DLAB));
1140
1141         /* Set DLAB 0, 7 Bit */
1142         soutp(UART_LCR, UART_LCR_WLEN7);
1143
1144         /* enable interrupts */
1145         soutp(UART_IER, sinp(UART_IER)|UART_IER_RDI);
1146 }
1147 #endif
1148
1149 #ifdef LIRC_SIR_ACTISYS_ACT220L
1150 /*
1151  * Derived from linux IrDA driver (net/irda/actisys.c)
1152  * Drop me a mail for any kind of comment: maxx@spaceboyz.net
1153  */
1154
1155 void init_act220(void)
1156 {
1157         int i;
1158
1159         /* DLAB 1 */
1160         soutp(UART_LCR, UART_LCR_DLAB|UART_LCR_WLEN7);
1161
1162         /* 9600 baud */
1163         soutp(UART_DLM, 0);
1164         soutp(UART_DLL, 12);
1165
1166         /* DLAB 0 */
1167         soutp(UART_LCR, UART_LCR_WLEN7);
1168
1169         /* reset the dongle, set DTR low for 10us */
1170         soutp(UART_MCR, UART_MCR_RTS|UART_MCR_OUT2);
1171         udelay(10);
1172
1173         /* back to normal (still 9600) */
1174         soutp(UART_MCR, UART_MCR_DTR|UART_MCR_RTS|UART_MCR_OUT2);
1175
1176         /*
1177          * send RTS pulses until we reach 115200
1178          * i hope this is really the same for act220l/act220l+
1179          */
1180         for (i = 0; i < 3; i++) {
1181                 udelay(10);
1182                 /* set RTS low for 10 us */
1183                 soutp(UART_MCR, UART_MCR_DTR|UART_MCR_OUT2);
1184                 udelay(10);
1185                 /* set RTS high for 10 us */
1186                 soutp(UART_MCR, UART_MCR_RTS|UART_MCR_DTR|UART_MCR_OUT2);
1187         }
1188
1189         /* back to normal operation */
1190         udelay(1500); /* better safe than sorry ;) */
1191
1192         /* Set DLAB 1. */
1193         soutp(UART_LCR, UART_LCR_DLAB | UART_LCR_WLEN7);
1194
1195         /* Set divisor to 1 => 115200 Baud */
1196         soutp(UART_DLM, 0);
1197         soutp(UART_DLL, 1);
1198
1199         /* Set DLAB 0, 7 Bit */
1200         /* The dongle doesn't seem to have any problems with operation at 7N1 */
1201         soutp(UART_LCR, UART_LCR_WLEN7);
1202
1203         /* enable interrupts */
1204         soutp(UART_IER, UART_IER_RDI);
1205 }
1206 #endif
1207
1208 static int init_lirc_sir(void)
1209 {
1210         int retval;
1211
1212         init_waitqueue_head(&lirc_read_queue);
1213         retval = init_port();
1214         if (retval < 0)
1215                 return retval;
1216         init_hardware();
1217         printk(KERN_INFO LIRC_DRIVER_NAME
1218                 ": Installed.\n");
1219         return 0;
1220 }
1221
1222 static int __devinit lirc_sir_probe(struct platform_device *dev)
1223 {
1224         return 0;
1225 }
1226
1227 static int __devexit lirc_sir_remove(struct platform_device *dev)
1228 {
1229         return 0;
1230 }
1231
1232 static struct platform_driver lirc_sir_driver = {
1233         .probe          = lirc_sir_probe,
1234         .remove         = __devexit_p(lirc_sir_remove),
1235         .driver         = {
1236                 .name   = "lirc_sir",
1237                 .owner  = THIS_MODULE,
1238         },
1239 };
1240
1241 static int __init lirc_sir_init(void)
1242 {
1243         int retval;
1244
1245         retval = platform_driver_register(&lirc_sir_driver);
1246         if (retval) {
1247                 printk(KERN_ERR LIRC_DRIVER_NAME ": Platform driver register "
1248                        "failed!\n");
1249                 return -ENODEV;
1250         }
1251
1252         lirc_sir_dev = platform_device_alloc("lirc_dev", 0);
1253         if (!lirc_sir_dev) {
1254                 printk(KERN_ERR LIRC_DRIVER_NAME ": Platform device alloc "
1255                        "failed!\n");
1256                 retval = -ENOMEM;
1257                 goto pdev_alloc_fail;
1258         }
1259
1260         retval = platform_device_add(lirc_sir_dev);
1261         if (retval) {
1262                 printk(KERN_ERR LIRC_DRIVER_NAME ": Platform device add "
1263                        "failed!\n");
1264                 retval = -ENODEV;
1265                 goto pdev_add_fail;
1266         }
1267
1268         retval = init_chrdev();
1269         if (retval < 0)
1270                 goto fail;
1271
1272         retval = init_lirc_sir();
1273         if (retval) {
1274                 drop_chrdev();
1275                 goto fail;
1276         }
1277
1278         return 0;
1279
1280 fail:
1281         platform_device_del(lirc_sir_dev);
1282 pdev_add_fail:
1283         platform_device_put(lirc_sir_dev);
1284 pdev_alloc_fail:
1285         platform_driver_unregister(&lirc_sir_driver);
1286         return retval;
1287 }
1288
1289 static void __exit lirc_sir_exit(void)
1290 {
1291         drop_hardware();
1292         drop_chrdev();
1293         drop_port();
1294         platform_device_unregister(lirc_sir_dev);
1295         platform_driver_unregister(&lirc_sir_driver);
1296         printk(KERN_INFO LIRC_DRIVER_NAME ": Uninstalled.\n");
1297 }
1298
1299 module_init(lirc_sir_init);
1300 module_exit(lirc_sir_exit);
1301
1302 #ifdef LIRC_SIR_TEKRAM
1303 MODULE_DESCRIPTION("Infrared receiver driver for Tekram Irmate 210");
1304 MODULE_AUTHOR("Christoph Bartelmus");
1305 #elif defined(LIRC_ON_SA1100)
1306 MODULE_DESCRIPTION("LIRC driver for StrongARM SA1100 embedded microprocessor");
1307 MODULE_AUTHOR("Christoph Bartelmus");
1308 #elif defined(LIRC_SIR_ACTISYS_ACT200L)
1309 MODULE_DESCRIPTION("LIRC driver for Actisys Act200L");
1310 MODULE_AUTHOR("Karl Bongers");
1311 #elif defined(LIRC_SIR_ACTISYS_ACT220L)
1312 MODULE_DESCRIPTION("LIRC driver for Actisys Act220L(+)");
1313 MODULE_AUTHOR("Jan Roemisch");
1314 #else
1315 MODULE_DESCRIPTION("Infrared receiver driver for SIR type serial ports");
1316 MODULE_AUTHOR("Milan Pikula");
1317 #endif
1318 MODULE_LICENSE("GPL");
1319
1320 #ifdef LIRC_ON_SA1100
1321 module_param(irq, int, S_IRUGO);
1322 MODULE_PARM_DESC(irq, "Interrupt (16)");
1323 #else
1324 module_param(io, int, S_IRUGO);
1325 MODULE_PARM_DESC(io, "I/O address base (0x3f8 or 0x2f8)");
1326
1327 module_param(irq, int, S_IRUGO);
1328 MODULE_PARM_DESC(irq, "Interrupt (4 or 3)");
1329
1330 module_param(threshold, int, S_IRUGO);
1331 MODULE_PARM_DESC(threshold, "space detection threshold (3)");
1332 #endif
1333
1334 module_param(debug, bool, S_IRUGO | S_IWUSR);
1335 MODULE_PARM_DESC(debug, "Enable debugging messages");