Jarod Wilson | 805a896 | 2010-07-26 20:30:51 -0300 | [diff] [blame] | 1 | /* |
| 2 | * lirc_parallel.c |
| 3 | * |
| 4 | * lirc_parallel - device driver for infra-red signal receiving and |
| 5 | * transmitting unit built by the author |
| 6 | * |
| 7 | * Copyright (C) 1998 Christoph Bartelmus <lirc@bartelmus.de> |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU General Public License as published by |
| 11 | * the Free Software Foundation; either version 2 of the License, or |
| 12 | * (at your option) any later version. |
| 13 | * |
| 14 | * This program is distributed in the hope that it will be useful, |
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 | * GNU General Public License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU General Public License |
| 20 | * along with this program; if not, write to the Free Software |
| 21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 22 | * |
| 23 | */ |
| 24 | |
| 25 | /*** Includes ***/ |
| 26 | |
Jarod Wilson | 805a896 | 2010-07-26 20:30:51 -0300 | [diff] [blame] | 27 | #include <linux/module.h> |
| 28 | #include <linux/sched.h> |
| 29 | #include <linux/errno.h> |
| 30 | #include <linux/signal.h> |
| 31 | #include <linux/fs.h> |
| 32 | #include <linux/kernel.h> |
| 33 | #include <linux/ioport.h> |
| 34 | #include <linux/time.h> |
| 35 | #include <linux/mm.h> |
| 36 | #include <linux/delay.h> |
| 37 | |
| 38 | #include <linux/io.h> |
Jarod Wilson | 805a896 | 2010-07-26 20:30:51 -0300 | [diff] [blame] | 39 | #include <linux/irq.h> |
| 40 | #include <linux/uaccess.h> |
| 41 | #include <asm/div64.h> |
| 42 | |
| 43 | #include <linux/poll.h> |
| 44 | #include <linux/parport.h> |
| 45 | |
| 46 | #include <media/lirc.h> |
| 47 | #include <media/lirc_dev.h> |
| 48 | |
| 49 | #include "lirc_parallel.h" |
| 50 | |
| 51 | #define LIRC_DRIVER_NAME "lirc_parallel" |
| 52 | |
| 53 | #ifndef LIRC_IRQ |
| 54 | #define LIRC_IRQ 7 |
| 55 | #endif |
| 56 | #ifndef LIRC_PORT |
| 57 | #define LIRC_PORT 0x378 |
| 58 | #endif |
| 59 | #ifndef LIRC_TIMER |
| 60 | #define LIRC_TIMER 65536 |
| 61 | #endif |
| 62 | |
| 63 | /*** Global Variables ***/ |
| 64 | |
| 65 | static int debug; |
| 66 | static int check_pselecd; |
| 67 | |
| 68 | unsigned int irq = LIRC_IRQ; |
| 69 | unsigned int io = LIRC_PORT; |
| 70 | #ifdef LIRC_TIMER |
| 71 | unsigned int timer; |
| 72 | unsigned int default_timer = LIRC_TIMER; |
| 73 | #endif |
| 74 | |
| 75 | #define RBUF_SIZE (256) /* this must be a power of 2 larger than 1 */ |
| 76 | |
| 77 | static int rbuf[RBUF_SIZE]; |
| 78 | |
| 79 | DECLARE_WAIT_QUEUE_HEAD(lirc_wait); |
| 80 | |
| 81 | unsigned int rptr; |
| 82 | unsigned int wptr; |
| 83 | unsigned int lost_irqs; |
| 84 | int is_open; |
| 85 | |
| 86 | struct parport *pport; |
| 87 | struct pardevice *ppdevice; |
| 88 | int is_claimed; |
| 89 | |
| 90 | unsigned int tx_mask = 1; |
| 91 | |
| 92 | /*** Internal Functions ***/ |
| 93 | |
| 94 | static unsigned int in(int offset) |
| 95 | { |
| 96 | switch (offset) { |
| 97 | case LIRC_LP_BASE: |
| 98 | return parport_read_data(pport); |
| 99 | case LIRC_LP_STATUS: |
| 100 | return parport_read_status(pport); |
| 101 | case LIRC_LP_CONTROL: |
| 102 | return parport_read_control(pport); |
| 103 | } |
| 104 | return 0; /* make compiler happy */ |
| 105 | } |
| 106 | |
| 107 | static void out(int offset, int value) |
| 108 | { |
| 109 | switch (offset) { |
| 110 | case LIRC_LP_BASE: |
| 111 | parport_write_data(pport, value); |
| 112 | break; |
| 113 | case LIRC_LP_CONTROL: |
| 114 | parport_write_control(pport, value); |
| 115 | break; |
| 116 | case LIRC_LP_STATUS: |
| 117 | printk(KERN_INFO "%s: attempt to write to status register\n", |
| 118 | LIRC_DRIVER_NAME); |
| 119 | break; |
| 120 | } |
| 121 | } |
| 122 | |
| 123 | static unsigned int lirc_get_timer(void) |
| 124 | { |
| 125 | return in(LIRC_PORT_TIMER) & LIRC_PORT_TIMER_BIT; |
| 126 | } |
| 127 | |
| 128 | static unsigned int lirc_get_signal(void) |
| 129 | { |
| 130 | return in(LIRC_PORT_SIGNAL) & LIRC_PORT_SIGNAL_BIT; |
| 131 | } |
| 132 | |
| 133 | static void lirc_on(void) |
| 134 | { |
| 135 | out(LIRC_PORT_DATA, tx_mask); |
| 136 | } |
| 137 | |
| 138 | static void lirc_off(void) |
| 139 | { |
| 140 | out(LIRC_PORT_DATA, 0); |
| 141 | } |
| 142 | |
| 143 | static unsigned int init_lirc_timer(void) |
| 144 | { |
| 145 | struct timeval tv, now; |
| 146 | unsigned int level, newlevel, timeelapsed, newtimer; |
| 147 | int count = 0; |
| 148 | |
| 149 | do_gettimeofday(&tv); |
| 150 | tv.tv_sec++; /* wait max. 1 sec. */ |
| 151 | level = lirc_get_timer(); |
| 152 | do { |
| 153 | newlevel = lirc_get_timer(); |
| 154 | if (level == 0 && newlevel != 0) |
| 155 | count++; |
| 156 | level = newlevel; |
| 157 | do_gettimeofday(&now); |
| 158 | } while (count < 1000 && (now.tv_sec < tv.tv_sec |
| 159 | || (now.tv_sec == tv.tv_sec |
| 160 | && now.tv_usec < tv.tv_usec))); |
| 161 | |
| 162 | timeelapsed = ((now.tv_sec + 1 - tv.tv_sec)*1000000 |
| 163 | + (now.tv_usec - tv.tv_usec)); |
| 164 | if (count >= 1000 && timeelapsed > 0) { |
| 165 | if (default_timer == 0) { |
| 166 | /* autodetect timer */ |
| 167 | newtimer = (1000000*count)/timeelapsed; |
| 168 | printk(KERN_INFO "%s: %u Hz timer detected\n", |
| 169 | LIRC_DRIVER_NAME, newtimer); |
| 170 | return newtimer; |
| 171 | } else { |
| 172 | newtimer = (1000000*count)/timeelapsed; |
| 173 | if (abs(newtimer - default_timer) > default_timer/10) { |
| 174 | /* bad timer */ |
| 175 | printk(KERN_NOTICE "%s: bad timer: %u Hz\n", |
| 176 | LIRC_DRIVER_NAME, newtimer); |
| 177 | printk(KERN_NOTICE "%s: using default timer: " |
| 178 | "%u Hz\n", |
| 179 | LIRC_DRIVER_NAME, default_timer); |
| 180 | return default_timer; |
| 181 | } else { |
| 182 | printk(KERN_INFO "%s: %u Hz timer detected\n", |
| 183 | LIRC_DRIVER_NAME, newtimer); |
| 184 | return newtimer; /* use detected value */ |
| 185 | } |
| 186 | } |
| 187 | } else { |
| 188 | printk(KERN_NOTICE "%s: no timer detected\n", LIRC_DRIVER_NAME); |
| 189 | return 0; |
| 190 | } |
| 191 | } |
| 192 | |
| 193 | static int lirc_claim(void) |
| 194 | { |
| 195 | if (parport_claim(ppdevice) != 0) { |
| 196 | printk(KERN_WARNING "%s: could not claim port\n", |
| 197 | LIRC_DRIVER_NAME); |
| 198 | printk(KERN_WARNING "%s: waiting for port becoming available" |
| 199 | "\n", LIRC_DRIVER_NAME); |
| 200 | if (parport_claim_or_block(ppdevice) < 0) { |
| 201 | printk(KERN_NOTICE "%s: could not claim port, giving" |
| 202 | " up\n", LIRC_DRIVER_NAME); |
| 203 | return 0; |
| 204 | } |
| 205 | } |
| 206 | out(LIRC_LP_CONTROL, LP_PSELECP|LP_PINITP); |
| 207 | is_claimed = 1; |
| 208 | return 1; |
| 209 | } |
| 210 | |
| 211 | /*** interrupt handler ***/ |
| 212 | |
| 213 | static void rbuf_write(int signal) |
| 214 | { |
| 215 | unsigned int nwptr; |
| 216 | |
| 217 | nwptr = (wptr + 1) & (RBUF_SIZE - 1); |
| 218 | if (nwptr == rptr) { |
| 219 | /* no new signals will be accepted */ |
| 220 | lost_irqs++; |
| 221 | printk(KERN_NOTICE "%s: buffer overrun\n", LIRC_DRIVER_NAME); |
| 222 | return; |
| 223 | } |
| 224 | rbuf[wptr] = signal; |
| 225 | wptr = nwptr; |
| 226 | } |
| 227 | |
| 228 | static void irq_handler(void *blah) |
| 229 | { |
| 230 | struct timeval tv; |
| 231 | static struct timeval lasttv; |
| 232 | static int init; |
| 233 | long signal; |
| 234 | int data; |
| 235 | unsigned int level, newlevel; |
| 236 | unsigned int timeout; |
| 237 | |
Jarod Wilson | 82ce67b | 2010-07-29 18:20:44 -0300 | [diff] [blame] | 238 | if (!is_open) |
Jarod Wilson | 805a896 | 2010-07-26 20:30:51 -0300 | [diff] [blame] | 239 | return; |
| 240 | |
| 241 | if (!is_claimed) |
| 242 | return; |
| 243 | |
| 244 | #if 0 |
| 245 | /* disable interrupt */ |
| 246 | disable_irq(irq); |
| 247 | out(LIRC_PORT_IRQ, in(LIRC_PORT_IRQ) & (~LP_PINTEN)); |
| 248 | #endif |
| 249 | if (check_pselecd && (in(1) & LP_PSELECD)) |
| 250 | return; |
| 251 | |
| 252 | #ifdef LIRC_TIMER |
| 253 | if (init) { |
| 254 | do_gettimeofday(&tv); |
| 255 | |
| 256 | signal = tv.tv_sec - lasttv.tv_sec; |
| 257 | if (signal > 15) |
| 258 | /* really long time */ |
| 259 | data = PULSE_MASK; |
| 260 | else |
| 261 | data = (int) (signal*1000000 + |
| 262 | tv.tv_usec - lasttv.tv_usec + |
| 263 | LIRC_SFH506_DELAY); |
| 264 | |
| 265 | rbuf_write(data); /* space */ |
| 266 | } else { |
| 267 | if (timer == 0) { |
| 268 | /* |
| 269 | * wake up; we'll lose this signal, but it will be |
| 270 | * garbage if the device is turned on anyway |
| 271 | */ |
| 272 | timer = init_lirc_timer(); |
| 273 | /* enable_irq(irq); */ |
| 274 | return; |
| 275 | } |
| 276 | init = 1; |
| 277 | } |
| 278 | |
| 279 | timeout = timer/10; /* timeout after 1/10 sec. */ |
| 280 | signal = 1; |
| 281 | level = lirc_get_timer(); |
| 282 | do { |
| 283 | newlevel = lirc_get_timer(); |
| 284 | if (level == 0 && newlevel != 0) |
| 285 | signal++; |
| 286 | level = newlevel; |
| 287 | |
| 288 | /* giving up */ |
| 289 | if (signal > timeout |
| 290 | || (check_pselecd && (in(1) & LP_PSELECD))) { |
| 291 | signal = 0; |
| 292 | printk(KERN_NOTICE "%s: timeout\n", LIRC_DRIVER_NAME); |
| 293 | break; |
| 294 | } |
| 295 | } while (lirc_get_signal()); |
| 296 | |
| 297 | if (signal != 0) { |
| 298 | /* ajust value to usecs */ |
Jarod Wilson | a126681 | 2010-10-08 17:35:09 -0300 | [diff] [blame] | 299 | __u64 helper; |
Jarod Wilson | 805a896 | 2010-07-26 20:30:51 -0300 | [diff] [blame] | 300 | |
Jarod Wilson | a126681 | 2010-10-08 17:35:09 -0300 | [diff] [blame] | 301 | helper = ((__u64) signal)*1000000; |
Jarod Wilson | 805a896 | 2010-07-26 20:30:51 -0300 | [diff] [blame] | 302 | do_div(helper, timer); |
| 303 | signal = (long) helper; |
| 304 | |
| 305 | if (signal > LIRC_SFH506_DELAY) |
| 306 | data = signal - LIRC_SFH506_DELAY; |
| 307 | else |
| 308 | data = 1; |
| 309 | rbuf_write(PULSE_BIT|data); /* pulse */ |
| 310 | } |
| 311 | do_gettimeofday(&lasttv); |
| 312 | #else |
| 313 | /* add your code here */ |
| 314 | #endif |
| 315 | |
| 316 | wake_up_interruptible(&lirc_wait); |
| 317 | |
| 318 | /* enable interrupt */ |
| 319 | /* |
| 320 | enable_irq(irq); |
| 321 | out(LIRC_PORT_IRQ, in(LIRC_PORT_IRQ)|LP_PINTEN); |
| 322 | */ |
| 323 | } |
| 324 | |
| 325 | /*** file operations ***/ |
| 326 | |
| 327 | static loff_t lirc_lseek(struct file *filep, loff_t offset, int orig) |
| 328 | { |
| 329 | return -ESPIPE; |
| 330 | } |
| 331 | |
| 332 | static ssize_t lirc_read(struct file *filep, char *buf, size_t n, loff_t *ppos) |
| 333 | { |
| 334 | int result = 0; |
| 335 | int count = 0; |
| 336 | DECLARE_WAITQUEUE(wait, current); |
| 337 | |
| 338 | if (n % sizeof(int)) |
| 339 | return -EINVAL; |
| 340 | |
| 341 | add_wait_queue(&lirc_wait, &wait); |
| 342 | set_current_state(TASK_INTERRUPTIBLE); |
| 343 | while (count < n) { |
| 344 | if (rptr != wptr) { |
| 345 | if (copy_to_user(buf+count, (char *) &rbuf[rptr], |
| 346 | sizeof(int))) { |
| 347 | result = -EFAULT; |
| 348 | break; |
| 349 | } |
| 350 | rptr = (rptr + 1) & (RBUF_SIZE - 1); |
| 351 | count += sizeof(int); |
| 352 | } else { |
| 353 | if (filep->f_flags & O_NONBLOCK) { |
| 354 | result = -EAGAIN; |
| 355 | break; |
| 356 | } |
| 357 | if (signal_pending(current)) { |
| 358 | result = -ERESTARTSYS; |
| 359 | break; |
| 360 | } |
| 361 | schedule(); |
| 362 | set_current_state(TASK_INTERRUPTIBLE); |
| 363 | } |
| 364 | } |
| 365 | remove_wait_queue(&lirc_wait, &wait); |
| 366 | set_current_state(TASK_RUNNING); |
| 367 | return count ? count : result; |
| 368 | } |
| 369 | |
| 370 | static ssize_t lirc_write(struct file *filep, const char *buf, size_t n, |
| 371 | loff_t *ppos) |
| 372 | { |
| 373 | int count; |
| 374 | unsigned int i; |
| 375 | unsigned int level, newlevel; |
| 376 | unsigned long flags; |
| 377 | int counttimer; |
| 378 | int *wbuf; |
| 379 | |
| 380 | if (!is_claimed) |
| 381 | return -EBUSY; |
| 382 | |
| 383 | count = n / sizeof(int); |
| 384 | |
| 385 | if (n % sizeof(int) || count % 2 == 0) |
| 386 | return -EINVAL; |
| 387 | |
| 388 | wbuf = memdup_user(buf, n); |
| 389 | if (IS_ERR(wbuf)) |
| 390 | return PTR_ERR(wbuf); |
| 391 | |
| 392 | #ifdef LIRC_TIMER |
| 393 | if (timer == 0) { |
| 394 | /* try again if device is ready */ |
| 395 | timer = init_lirc_timer(); |
| 396 | if (timer == 0) |
| 397 | return -EIO; |
| 398 | } |
| 399 | |
| 400 | /* adjust values from usecs */ |
| 401 | for (i = 0; i < count; i++) { |
Jarod Wilson | a126681 | 2010-10-08 17:35:09 -0300 | [diff] [blame] | 402 | __u64 helper; |
Jarod Wilson | 805a896 | 2010-07-26 20:30:51 -0300 | [diff] [blame] | 403 | |
Jarod Wilson | a126681 | 2010-10-08 17:35:09 -0300 | [diff] [blame] | 404 | helper = ((__u64) wbuf[i])*timer; |
Jarod Wilson | 805a896 | 2010-07-26 20:30:51 -0300 | [diff] [blame] | 405 | do_div(helper, 1000000); |
| 406 | wbuf[i] = (int) helper; |
| 407 | } |
| 408 | |
| 409 | local_irq_save(flags); |
| 410 | i = 0; |
| 411 | while (i < count) { |
| 412 | level = lirc_get_timer(); |
| 413 | counttimer = 0; |
| 414 | lirc_on(); |
| 415 | do { |
| 416 | newlevel = lirc_get_timer(); |
| 417 | if (level == 0 && newlevel != 0) |
| 418 | counttimer++; |
| 419 | level = newlevel; |
| 420 | if (check_pselecd && (in(1) & LP_PSELECD)) { |
| 421 | lirc_off(); |
| 422 | local_irq_restore(flags); |
| 423 | return -EIO; |
| 424 | } |
| 425 | } while (counttimer < wbuf[i]); |
| 426 | i++; |
| 427 | |
| 428 | lirc_off(); |
| 429 | if (i == count) |
| 430 | break; |
| 431 | counttimer = 0; |
| 432 | do { |
| 433 | newlevel = lirc_get_timer(); |
| 434 | if (level == 0 && newlevel != 0) |
| 435 | counttimer++; |
| 436 | level = newlevel; |
| 437 | if (check_pselecd && (in(1) & LP_PSELECD)) { |
| 438 | local_irq_restore(flags); |
| 439 | return -EIO; |
| 440 | } |
| 441 | } while (counttimer < wbuf[i]); |
| 442 | i++; |
| 443 | } |
| 444 | local_irq_restore(flags); |
| 445 | #else |
| 446 | /* place code that handles write without external timer here */ |
| 447 | #endif |
| 448 | return n; |
| 449 | } |
| 450 | |
| 451 | static unsigned int lirc_poll(struct file *file, poll_table *wait) |
| 452 | { |
| 453 | poll_wait(file, &lirc_wait, wait); |
| 454 | if (rptr != wptr) |
| 455 | return POLLIN | POLLRDNORM; |
| 456 | return 0; |
| 457 | } |
| 458 | |
| 459 | static long lirc_ioctl(struct file *filep, unsigned int cmd, unsigned long arg) |
| 460 | { |
| 461 | int result; |
Jarod Wilson | a126681 | 2010-10-08 17:35:09 -0300 | [diff] [blame] | 462 | __u32 features = LIRC_CAN_SET_TRANSMITTER_MASK | |
| 463 | LIRC_CAN_SEND_PULSE | LIRC_CAN_REC_MODE2; |
| 464 | __u32 mode; |
| 465 | __u32 value; |
Jarod Wilson | 805a896 | 2010-07-26 20:30:51 -0300 | [diff] [blame] | 466 | |
| 467 | switch (cmd) { |
| 468 | case LIRC_GET_FEATURES: |
Jarod Wilson | a126681 | 2010-10-08 17:35:09 -0300 | [diff] [blame] | 469 | result = put_user(features, (__u32 *) arg); |
Jarod Wilson | 805a896 | 2010-07-26 20:30:51 -0300 | [diff] [blame] | 470 | if (result) |
| 471 | return result; |
| 472 | break; |
| 473 | case LIRC_GET_SEND_MODE: |
Jarod Wilson | a126681 | 2010-10-08 17:35:09 -0300 | [diff] [blame] | 474 | result = put_user(LIRC_MODE_PULSE, (__u32 *) arg); |
Jarod Wilson | 805a896 | 2010-07-26 20:30:51 -0300 | [diff] [blame] | 475 | if (result) |
| 476 | return result; |
| 477 | break; |
| 478 | case LIRC_GET_REC_MODE: |
Jarod Wilson | a126681 | 2010-10-08 17:35:09 -0300 | [diff] [blame] | 479 | result = put_user(LIRC_MODE_MODE2, (__u32 *) arg); |
Jarod Wilson | 805a896 | 2010-07-26 20:30:51 -0300 | [diff] [blame] | 480 | if (result) |
| 481 | return result; |
| 482 | break; |
| 483 | case LIRC_SET_SEND_MODE: |
Jarod Wilson | a126681 | 2010-10-08 17:35:09 -0300 | [diff] [blame] | 484 | result = get_user(mode, (__u32 *) arg); |
Jarod Wilson | 805a896 | 2010-07-26 20:30:51 -0300 | [diff] [blame] | 485 | if (result) |
| 486 | return result; |
| 487 | if (mode != LIRC_MODE_PULSE) |
| 488 | return -EINVAL; |
| 489 | break; |
| 490 | case LIRC_SET_REC_MODE: |
Jarod Wilson | a126681 | 2010-10-08 17:35:09 -0300 | [diff] [blame] | 491 | result = get_user(mode, (__u32 *) arg); |
Jarod Wilson | 805a896 | 2010-07-26 20:30:51 -0300 | [diff] [blame] | 492 | if (result) |
| 493 | return result; |
| 494 | if (mode != LIRC_MODE_MODE2) |
| 495 | return -ENOSYS; |
| 496 | break; |
| 497 | case LIRC_SET_TRANSMITTER_MASK: |
Jarod Wilson | a126681 | 2010-10-08 17:35:09 -0300 | [diff] [blame] | 498 | result = get_user(value, (__u32 *) arg); |
Jarod Wilson | 805a896 | 2010-07-26 20:30:51 -0300 | [diff] [blame] | 499 | if (result) |
| 500 | return result; |
Jarod Wilson | a126681 | 2010-10-08 17:35:09 -0300 | [diff] [blame] | 501 | if ((value & LIRC_PARALLEL_TRANSMITTER_MASK) != value) |
Jarod Wilson | 805a896 | 2010-07-26 20:30:51 -0300 | [diff] [blame] | 502 | return LIRC_PARALLEL_MAX_TRANSMITTERS; |
Jarod Wilson | a126681 | 2010-10-08 17:35:09 -0300 | [diff] [blame] | 503 | tx_mask = value; |
Jarod Wilson | 805a896 | 2010-07-26 20:30:51 -0300 | [diff] [blame] | 504 | break; |
| 505 | default: |
| 506 | return -ENOIOCTLCMD; |
| 507 | } |
| 508 | return 0; |
| 509 | } |
| 510 | |
| 511 | static int lirc_open(struct inode *node, struct file *filep) |
| 512 | { |
Jarod Wilson | 82ce67b | 2010-07-29 18:20:44 -0300 | [diff] [blame] | 513 | if (is_open || !lirc_claim()) |
Jarod Wilson | 805a896 | 2010-07-26 20:30:51 -0300 | [diff] [blame] | 514 | return -EBUSY; |
| 515 | |
| 516 | parport_enable_irq(pport); |
| 517 | |
| 518 | /* init read ptr */ |
| 519 | rptr = 0; |
| 520 | wptr = 0; |
| 521 | lost_irqs = 0; |
| 522 | |
| 523 | is_open = 1; |
| 524 | return 0; |
| 525 | } |
| 526 | |
| 527 | static int lirc_close(struct inode *node, struct file *filep) |
| 528 | { |
| 529 | if (is_claimed) { |
| 530 | is_claimed = 0; |
| 531 | parport_release(ppdevice); |
| 532 | } |
| 533 | is_open = 0; |
| 534 | return 0; |
| 535 | } |
| 536 | |
Mauro Carvalho Chehab | 0f9313a | 2010-07-27 18:44:45 -0300 | [diff] [blame] | 537 | static const struct file_operations lirc_fops = { |
Jarod Wilson | 805a896 | 2010-07-26 20:30:51 -0300 | [diff] [blame] | 538 | .owner = THIS_MODULE, |
| 539 | .llseek = lirc_lseek, |
| 540 | .read = lirc_read, |
| 541 | .write = lirc_write, |
| 542 | .poll = lirc_poll, |
| 543 | .unlocked_ioctl = lirc_ioctl, |
Jarod Wilson | 8be292c | 2010-10-09 15:07:06 -0300 | [diff] [blame] | 544 | #ifdef CONFIG_COMPAT |
| 545 | .compat_ioctl = lirc_ioctl, |
| 546 | #endif |
Jarod Wilson | 805a896 | 2010-07-26 20:30:51 -0300 | [diff] [blame] | 547 | .open = lirc_open, |
| 548 | .release = lirc_close |
| 549 | }; |
| 550 | |
| 551 | static int set_use_inc(void *data) |
| 552 | { |
| 553 | return 0; |
| 554 | } |
| 555 | |
| 556 | static void set_use_dec(void *data) |
| 557 | { |
| 558 | } |
| 559 | |
| 560 | static struct lirc_driver driver = { |
| 561 | .name = LIRC_DRIVER_NAME, |
| 562 | .minor = -1, |
| 563 | .code_length = 1, |
| 564 | .sample_rate = 0, |
| 565 | .data = NULL, |
| 566 | .add_to_buf = NULL, |
| 567 | .set_use_inc = set_use_inc, |
| 568 | .set_use_dec = set_use_dec, |
| 569 | .fops = &lirc_fops, |
| 570 | .dev = NULL, |
| 571 | .owner = THIS_MODULE, |
| 572 | }; |
| 573 | |
| 574 | static int pf(void *handle); |
| 575 | static void kf(void *handle); |
| 576 | |
Jarod Wilson | 805a896 | 2010-07-26 20:30:51 -0300 | [diff] [blame] | 577 | static int pf(void *handle) |
| 578 | { |
| 579 | parport_disable_irq(pport); |
| 580 | is_claimed = 0; |
| 581 | return 0; |
| 582 | } |
| 583 | |
| 584 | static void kf(void *handle) |
| 585 | { |
| 586 | if (!is_open) |
| 587 | return; |
| 588 | if (!lirc_claim()) |
| 589 | return; |
| 590 | parport_enable_irq(pport); |
| 591 | lirc_off(); |
| 592 | /* this is a bit annoying when you actually print...*/ |
| 593 | /* |
| 594 | printk(KERN_INFO "%s: reclaimed port\n", LIRC_DRIVER_NAME); |
| 595 | */ |
| 596 | } |
| 597 | |
| 598 | /*** module initialization and cleanup ***/ |
| 599 | |
| 600 | static int __init lirc_parallel_init(void) |
| 601 | { |
| 602 | pport = parport_find_base(io); |
| 603 | if (pport == NULL) { |
| 604 | printk(KERN_NOTICE "%s: no port at %x found\n", |
| 605 | LIRC_DRIVER_NAME, io); |
| 606 | return -ENXIO; |
| 607 | } |
| 608 | ppdevice = parport_register_device(pport, LIRC_DRIVER_NAME, |
| 609 | pf, kf, irq_handler, 0, NULL); |
| 610 | parport_put_port(pport); |
| 611 | if (ppdevice == NULL) { |
| 612 | printk(KERN_NOTICE "%s: parport_register_device() failed\n", |
| 613 | LIRC_DRIVER_NAME); |
| 614 | return -ENXIO; |
| 615 | } |
| 616 | if (parport_claim(ppdevice) != 0) |
| 617 | goto skip_init; |
| 618 | is_claimed = 1; |
| 619 | out(LIRC_LP_CONTROL, LP_PSELECP|LP_PINITP); |
| 620 | |
| 621 | #ifdef LIRC_TIMER |
| 622 | if (debug) |
| 623 | out(LIRC_PORT_DATA, tx_mask); |
| 624 | |
| 625 | timer = init_lirc_timer(); |
| 626 | |
| 627 | #if 0 /* continue even if device is offline */ |
| 628 | if (timer == 0) { |
| 629 | is_claimed = 0; |
| 630 | parport_release(pport); |
| 631 | parport_unregister_device(ppdevice); |
| 632 | return -EIO; |
| 633 | } |
| 634 | |
| 635 | #endif |
| 636 | if (debug) |
| 637 | out(LIRC_PORT_DATA, 0); |
| 638 | #endif |
| 639 | |
| 640 | is_claimed = 0; |
| 641 | parport_release(ppdevice); |
| 642 | skip_init: |
| 643 | driver.minor = lirc_register_driver(&driver); |
| 644 | if (driver.minor < 0) { |
| 645 | printk(KERN_NOTICE "%s: register_chrdev() failed\n", |
| 646 | LIRC_DRIVER_NAME); |
| 647 | parport_unregister_device(ppdevice); |
| 648 | return -EIO; |
| 649 | } |
| 650 | printk(KERN_INFO "%s: installed using port 0x%04x irq %d\n", |
| 651 | LIRC_DRIVER_NAME, io, irq); |
| 652 | return 0; |
| 653 | } |
| 654 | |
| 655 | static void __exit lirc_parallel_exit(void) |
| 656 | { |
| 657 | parport_unregister_device(ppdevice); |
| 658 | lirc_unregister_driver(driver.minor); |
| 659 | } |
| 660 | |
| 661 | module_init(lirc_parallel_init); |
| 662 | module_exit(lirc_parallel_exit); |
| 663 | |
| 664 | MODULE_DESCRIPTION("Infrared receiver driver for parallel ports."); |
| 665 | MODULE_AUTHOR("Christoph Bartelmus"); |
| 666 | MODULE_LICENSE("GPL"); |
| 667 | |
| 668 | module_param(io, int, S_IRUGO); |
| 669 | MODULE_PARM_DESC(io, "I/O address base (0x3bc, 0x378 or 0x278)"); |
| 670 | |
| 671 | module_param(irq, int, S_IRUGO); |
| 672 | MODULE_PARM_DESC(irq, "Interrupt (7 or 5)"); |
| 673 | |
| 674 | module_param(tx_mask, int, S_IRUGO); |
| 675 | MODULE_PARM_DESC(tx_maxk, "Transmitter mask (default: 0x01)"); |
| 676 | |
| 677 | module_param(debug, bool, S_IRUGO | S_IWUSR); |
| 678 | MODULE_PARM_DESC(debug, "Enable debugging messages"); |
| 679 | |
| 680 | module_param(check_pselecd, bool, S_IRUGO | S_IWUSR); |
| 681 | MODULE_PARM_DESC(debug, "Check for printer (default: 0)"); |