1 /* radio-cadet.c - A video4linux driver for the ADS Cadet AM/FM Radio Card 2 * 3 * by Fred Gleason <fredg@wava.com> 4 * Version 0.3.3 5 * 6 * (Loosely) based on code for the Aztech radio card by 7 * 8 * Russell Kroll (rkroll@exploits.org) 9 * Quay Ly 10 * Donald Song 11 * Jason Lewis (jlewis@twilight.vtc.vsc.edu) 12 * Scott McGrath (smcgrath@twilight.vtc.vsc.edu) 13 * William McGrath (wmcgrath@twilight.vtc.vsc.edu) 14 * 15 * History: 16 * 2000-04-29 Russell Kroll <rkroll@exploits.org> 17 * Added ISAPnP detection for Linux 2.3/2.4 18 * 19 * 2001-01-10 Russell Kroll <rkroll@exploits.org> 20 * Removed dead CONFIG_RADIO_CADET_PORT code 21 * PnP detection on load is now default (no args necessary) 22 * 23 * 2002-01-17 Adam Belay <ambx1@neo.rr.com> 24 * Updated to latest pnp code 25 * 26 * 2003-01-31 Alan Cox <alan@lxorguk.ukuu.org.uk> 27 * Cleaned up locking, delay code, general odds and ends 28 * 29 * 2006-07-30 Hans J. Koch <koch@hjk-az.de> 30 * Changed API to V4L2 31 */ 32 33 #include <linux/module.h> /* Modules */ 34 #include <linux/init.h> /* Initdata */ 35 #include <linux/ioport.h> /* request_region */ 36 #include <linux/delay.h> /* udelay */ 37 #include <linux/videodev2.h> /* V4L2 API defs */ 38 #include <linux/param.h> 39 #include <linux/pnp.h> 40 #include <linux/sched.h> 41 #include <linux/io.h> /* outb, outb_p */ 42 #include <media/v4l2-device.h> 43 #include <media/v4l2-ioctl.h> 44 #include <media/v4l2-ctrls.h> 45 #include <media/v4l2-fh.h> 46 #include <media/v4l2-event.h> 47 48 MODULE_AUTHOR("Fred Gleason, Russell Kroll, Quay Lu, Donald Song, Jason Lewis, Scott McGrath, William McGrath"); 49 MODULE_DESCRIPTION("A driver for the ADS Cadet AM/FM/RDS radio card."); 50 MODULE_LICENSE("GPL"); 51 MODULE_VERSION("0.3.4"); 52 53 static int io = -1; /* default to isapnp activation */ 54 static int radio_nr = -1; 55 56 module_param(io, int, 0); 57 MODULE_PARM_DESC(io, "I/O address of Cadet card (0x330,0x332,0x334,0x336,0x338,0x33a,0x33c,0x33e)"); 58 module_param(radio_nr, int, 0); 59 60 #define RDS_BUFFER 256 61 #define RDS_RX_FLAG 1 62 #define MBS_RX_FLAG 2 63 64 struct cadet { 65 struct v4l2_device v4l2_dev; 66 struct video_device vdev; 67 struct v4l2_ctrl_handler ctrl_handler; 68 int io; 69 bool is_fm_band; 70 u32 curfreq; 71 int tunestat; 72 int sigstrength; 73 wait_queue_head_t read_queue; 74 struct timer_list readtimer; 75 u8 rdsin, rdsout, rdsstat; 76 unsigned char rdsbuf[RDS_BUFFER]; 77 struct mutex lock; 78 int reading; 79 }; 80 81 static struct cadet cadet_card; 82 83 /* 84 * Signal Strength Threshold Values 85 * The V4L API spec does not define any particular unit for the signal 86 * strength value. These values are in microvolts of RF at the tuner's input. 87 */ 88 static u16 sigtable[2][4] = { 89 { 1835, 2621, 4128, 65535 }, 90 { 2185, 4369, 13107, 65535 }, 91 }; 92 93 94 static int cadet_getstereo(struct cadet *dev) 95 { 96 int ret = V4L2_TUNER_SUB_MONO; 97 98 if (!dev->is_fm_band) /* Only FM has stereo capability! */ 99 return V4L2_TUNER_SUB_MONO; 100 101 outb(7, dev->io); /* Select tuner control */ 102 if ((inb(dev->io + 1) & 0x40) == 0) 103 ret = V4L2_TUNER_SUB_STEREO; 104 return ret; 105 } 106 107 static unsigned cadet_gettune(struct cadet *dev) 108 { 109 int curvol, i; 110 unsigned fifo = 0; 111 112 /* 113 * Prepare for read 114 */ 115 116 outb(7, dev->io); /* Select tuner control */ 117 curvol = inb(dev->io + 1); /* Save current volume/mute setting */ 118 outb(0x00, dev->io + 1); /* Ensure WRITE-ENABLE is LOW */ 119 dev->tunestat = 0xffff; 120 121 /* 122 * Read the shift register 123 */ 124 for (i = 0; i < 25; i++) { 125 fifo = (fifo << 1) | ((inb(dev->io + 1) >> 7) & 0x01); 126 if (i < 24) { 127 outb(0x01, dev->io + 1); 128 dev->tunestat &= inb(dev->io + 1); 129 outb(0x00, dev->io + 1); 130 } 131 } 132 133 /* 134 * Restore volume/mute setting 135 */ 136 outb(curvol, dev->io + 1); 137 return fifo; 138 } 139 140 static unsigned cadet_getfreq(struct cadet *dev) 141 { 142 int i; 143 unsigned freq = 0, test, fifo = 0; 144 145 /* 146 * Read current tuning 147 */ 148 fifo = cadet_gettune(dev); 149 150 /* 151 * Convert to actual frequency 152 */ 153 if (!dev->is_fm_band) /* AM */ 154 return ((fifo & 0x7fff) - 450) * 16; 155 156 test = 12500; 157 for (i = 0; i < 14; i++) { 158 if ((fifo & 0x01) != 0) 159 freq += test; 160 test = test << 1; 161 fifo = fifo >> 1; 162 } 163 freq -= 10700000; /* IF frequency is 10.7 MHz */ 164 freq = (freq * 16) / 1000; /* Make it 1/16 kHz */ 165 return freq; 166 } 167 168 static void cadet_settune(struct cadet *dev, unsigned fifo) 169 { 170 int i; 171 unsigned test; 172 173 outb(7, dev->io); /* Select tuner control */ 174 /* 175 * Write the shift register 176 */ 177 test = 0; 178 test = (fifo >> 23) & 0x02; /* Align data for SDO */ 179 test |= 0x1c; /* SDM=1, SWE=1, SEN=1, SCK=0 */ 180 outb(7, dev->io); /* Select tuner control */ 181 outb(test, dev->io + 1); /* Initialize for write */ 182 for (i = 0; i < 25; i++) { 183 test |= 0x01; /* Toggle SCK High */ 184 outb(test, dev->io + 1); 185 test &= 0xfe; /* Toggle SCK Low */ 186 outb(test, dev->io + 1); 187 fifo = fifo << 1; /* Prepare the next bit */ 188 test = 0x1c | ((fifo >> 23) & 0x02); 189 outb(test, dev->io + 1); 190 } 191 } 192 193 static void cadet_setfreq(struct cadet *dev, unsigned freq) 194 { 195 unsigned fifo; 196 int i, j, test; 197 int curvol; 198 199 dev->curfreq = freq; 200 /* 201 * Formulate a fifo command 202 */ 203 fifo = 0; 204 if (dev->is_fm_band) { /* FM */ 205 test = 102400; 206 freq = freq / 16; /* Make it kHz */ 207 freq += 10700; /* IF is 10700 kHz */ 208 for (i = 0; i < 14; i++) { 209 fifo = fifo << 1; 210 if (freq >= test) { 211 fifo |= 0x01; 212 freq -= test; 213 } 214 test = test >> 1; 215 } 216 } else { /* AM */ 217 fifo = (freq / 16) + 450; /* Make it kHz */ 218 fifo |= 0x100000; /* Select AM Band */ 219 } 220 221 /* 222 * Save current volume/mute setting 223 */ 224 225 outb(7, dev->io); /* Select tuner control */ 226 curvol = inb(dev->io + 1); 227 228 /* 229 * Tune the card 230 */ 231 for (j = 3; j > -1; j--) { 232 cadet_settune(dev, fifo | (j << 16)); 233 234 outb(7, dev->io); /* Select tuner control */ 235 outb(curvol, dev->io + 1); 236 237 msleep(100); 238 239 cadet_gettune(dev); 240 if ((dev->tunestat & 0x40) == 0) { /* Tuned */ 241 dev->sigstrength = sigtable[dev->is_fm_band][j]; 242 goto reset_rds; 243 } 244 } 245 dev->sigstrength = 0; 246 reset_rds: 247 outb(3, dev->io); 248 outb(inb(dev->io + 1) & 0x7f, dev->io + 1); 249 } 250 251 252 static void cadet_handler(unsigned long data) 253 { 254 struct cadet *dev = (void *)data; 255 256 /* Service the RDS fifo */ 257 if (mutex_trylock(&dev->lock)) { 258 outb(0x3, dev->io); /* Select RDS Decoder Control */ 259 if ((inb(dev->io + 1) & 0x20) != 0) 260 printk(KERN_CRIT "cadet: RDS fifo overflow\n"); 261 outb(0x80, dev->io); /* Select RDS fifo */ 262 while ((inb(dev->io) & 0x80) != 0) { 263 dev->rdsbuf[dev->rdsin] = inb(dev->io + 1); 264 if (dev->rdsin + 1 == dev->rdsout) 265 printk(KERN_WARNING "cadet: RDS buffer overflow\n"); 266 else 267 dev->rdsin++; 268 } 269 mutex_unlock(&dev->lock); 270 } 271 272 /* 273 * Service pending read 274 */ 275 if (dev->rdsin != dev->rdsout) 276 wake_up_interruptible(&dev->read_queue); 277 278 /* 279 * Clean up and exit 280 */ 281 init_timer(&dev->readtimer); 282 dev->readtimer.function = cadet_handler; 283 dev->readtimer.data = data; 284 dev->readtimer.expires = jiffies + msecs_to_jiffies(50); 285 add_timer(&dev->readtimer); 286 } 287 288 static void cadet_start_rds(struct cadet *dev) 289 { 290 dev->rdsstat = 1; 291 outb(0x80, dev->io); /* Select RDS fifo */ 292 init_timer(&dev->readtimer); 293 dev->readtimer.function = cadet_handler; 294 dev->readtimer.data = (unsigned long)dev; 295 dev->readtimer.expires = jiffies + msecs_to_jiffies(50); 296 add_timer(&dev->readtimer); 297 } 298 299 static ssize_t cadet_read(struct file *file, char __user *data, size_t count, loff_t *ppos) 300 { 301 struct cadet *dev = video_drvdata(file); 302 unsigned char readbuf[RDS_BUFFER]; 303 int i = 0; 304 305 mutex_lock(&dev->lock); 306 if (dev->rdsstat == 0) 307 cadet_start_rds(dev); 308 if (dev->rdsin == dev->rdsout) { 309 if (file->f_flags & O_NONBLOCK) { 310 i = -EWOULDBLOCK; 311 goto unlock; 312 } 313 mutex_unlock(&dev->lock); 314 interruptible_sleep_on(&dev->read_queue); 315 mutex_lock(&dev->lock); 316 } 317 while (i < count && dev->rdsin != dev->rdsout) 318 readbuf[i++] = dev->rdsbuf[dev->rdsout++]; 319 320 if (i && copy_to_user(data, readbuf, i)) 321 i = -EFAULT; 322 unlock: 323 mutex_unlock(&dev->lock); 324 return i; 325 } 326 327 328 static int vidioc_querycap(struct file *file, void *priv, 329 struct v4l2_capability *v) 330 { 331 strlcpy(v->driver, "ADS Cadet", sizeof(v->driver)); 332 strlcpy(v->card, "ADS Cadet", sizeof(v->card)); 333 strlcpy(v->bus_info, "ISA", sizeof(v->bus_info)); 334 v->device_caps = V4L2_CAP_TUNER | V4L2_CAP_RADIO | 335 V4L2_CAP_READWRITE | V4L2_CAP_RDS_CAPTURE; 336 v->capabilities = v->device_caps | V4L2_CAP_DEVICE_CAPS; 337 return 0; 338 } 339 340 static const struct v4l2_frequency_band bands[] = { 341 { 342 .index = 0, 343 .type = V4L2_TUNER_RADIO, 344 .capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_FREQ_BANDS, 345 .rangelow = 8320, /* 520 kHz */ 346 .rangehigh = 26400, /* 1650 kHz */ 347 .modulation = V4L2_BAND_MODULATION_AM, 348 }, { 349 .index = 1, 350 .type = V4L2_TUNER_RADIO, 351 .capability = V4L2_TUNER_CAP_STEREO | V4L2_TUNER_CAP_RDS | 352 V4L2_TUNER_CAP_RDS_BLOCK_IO | V4L2_TUNER_CAP_LOW | 353 V4L2_TUNER_CAP_FREQ_BANDS, 354 .rangelow = 1400000, /* 87.5 MHz */ 355 .rangehigh = 1728000, /* 108.0 MHz */ 356 .modulation = V4L2_BAND_MODULATION_FM, 357 }, 358 }; 359 360 static int vidioc_g_tuner(struct file *file, void *priv, 361 struct v4l2_tuner *v) 362 { 363 struct cadet *dev = video_drvdata(file); 364 365 if (v->index) 366 return -EINVAL; 367 v->type = V4L2_TUNER_RADIO; 368 strlcpy(v->name, "Radio", sizeof(v->name)); 369 v->capability = bands[0].capability | bands[1].capability; 370 v->rangelow = bands[0].rangelow; /* 520 kHz (start of AM band) */ 371 v->rangehigh = bands[1].rangehigh; /* 108.0 MHz (end of FM band) */ 372 if (dev->is_fm_band) { 373 v->rxsubchans = cadet_getstereo(dev); 374 outb(3, dev->io); 375 outb(inb(dev->io + 1) & 0x7f, dev->io + 1); 376 mdelay(100); 377 outb(3, dev->io); 378 if (inb(dev->io + 1) & 0x80) 379 v->rxsubchans |= V4L2_TUNER_SUB_RDS; 380 } else { 381 v->rangelow = 8320; /* 520 kHz */ 382 v->rangehigh = 26400; /* 1650 kHz */ 383 v->rxsubchans = V4L2_TUNER_SUB_MONO; 384 } 385 v->audmode = V4L2_TUNER_MODE_STEREO; 386 v->signal = dev->sigstrength; /* We might need to modify scaling of this */ 387 return 0; 388 } 389 390 static int vidioc_s_tuner(struct file *file, void *priv, 391 struct v4l2_tuner *v) 392 { 393 return v->index ? -EINVAL : 0; 394 } 395 396 static int vidioc_enum_freq_bands(struct file *file, void *priv, 397 struct v4l2_frequency_band *band) 398 { 399 if (band->tuner) 400 return -EINVAL; 401 if (band->index >= ARRAY_SIZE(bands)) 402 return -EINVAL; 403 *band = bands[band->index]; 404 return 0; 405 } 406 407 static int vidioc_g_frequency(struct file *file, void *priv, 408 struct v4l2_frequency *f) 409 { 410 struct cadet *dev = video_drvdata(file); 411 412 if (f->tuner) 413 return -EINVAL; 414 f->type = V4L2_TUNER_RADIO; 415 f->frequency = dev->curfreq; 416 return 0; 417 } 418 419 420 static int vidioc_s_frequency(struct file *file, void *priv, 421 struct v4l2_frequency *f) 422 { 423 struct cadet *dev = video_drvdata(file); 424 425 if (f->tuner) 426 return -EINVAL; 427 dev->is_fm_band = 428 f->frequency >= (bands[0].rangehigh + bands[1].rangelow) / 2; 429 clamp(f->frequency, bands[dev->is_fm_band].rangelow, 430 bands[dev->is_fm_band].rangehigh); 431 cadet_setfreq(dev, f->frequency); 432 return 0; 433 } 434 435 static int cadet_s_ctrl(struct v4l2_ctrl *ctrl) 436 { 437 struct cadet *dev = container_of(ctrl->handler, struct cadet, ctrl_handler); 438 439 switch (ctrl->id) { 440 case V4L2_CID_AUDIO_MUTE: 441 outb(7, dev->io); /* Select tuner control */ 442 if (ctrl->val) 443 outb(0x00, dev->io + 1); 444 else 445 outb(0x20, dev->io + 1); 446 return 0; 447 } 448 return -EINVAL; 449 } 450 451 static int cadet_open(struct file *file) 452 { 453 struct cadet *dev = video_drvdata(file); 454 int err; 455 456 mutex_lock(&dev->lock); 457 err = v4l2_fh_open(file); 458 if (err) 459 goto fail; 460 if (v4l2_fh_is_singular_file(file)) 461 init_waitqueue_head(&dev->read_queue); 462 fail: 463 mutex_unlock(&dev->lock); 464 return err; 465 } 466 467 static int cadet_release(struct file *file) 468 { 469 struct cadet *dev = video_drvdata(file); 470 471 mutex_lock(&dev->lock); 472 if (v4l2_fh_is_singular_file(file) && dev->rdsstat) { 473 del_timer_sync(&dev->readtimer); 474 dev->rdsstat = 0; 475 } 476 v4l2_fh_release(file); 477 mutex_unlock(&dev->lock); 478 return 0; 479 } 480 481 static unsigned int cadet_poll(struct file *file, struct poll_table_struct *wait) 482 { 483 struct cadet *dev = video_drvdata(file); 484 unsigned long req_events = poll_requested_events(wait); 485 unsigned int res = v4l2_ctrl_poll(file, wait); 486 487 poll_wait(file, &dev->read_queue, wait); 488 if (dev->rdsstat == 0 && (req_events & (POLLIN | POLLRDNORM))) { 489 mutex_lock(&dev->lock); 490 if (dev->rdsstat == 0) 491 cadet_start_rds(dev); 492 mutex_unlock(&dev->lock); 493 } 494 if (dev->rdsin != dev->rdsout) 495 res |= POLLIN | POLLRDNORM; 496 return res; 497 } 498 499 500 static const struct v4l2_file_operations cadet_fops = { 501 .owner = THIS_MODULE, 502 .open = cadet_open, 503 .release = cadet_release, 504 .read = cadet_read, 505 .unlocked_ioctl = video_ioctl2, 506 .poll = cadet_poll, 507 }; 508 509 static const struct v4l2_ioctl_ops cadet_ioctl_ops = { 510 .vidioc_querycap = vidioc_querycap, 511 .vidioc_g_tuner = vidioc_g_tuner, 512 .vidioc_s_tuner = vidioc_s_tuner, 513 .vidioc_g_frequency = vidioc_g_frequency, 514 .vidioc_s_frequency = vidioc_s_frequency, 515 .vidioc_enum_freq_bands = vidioc_enum_freq_bands, 516 .vidioc_log_status = v4l2_ctrl_log_status, 517 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, 518 .vidioc_unsubscribe_event = v4l2_event_unsubscribe, 519 }; 520 521 static const struct v4l2_ctrl_ops cadet_ctrl_ops = { 522 .s_ctrl = cadet_s_ctrl, 523 }; 524 525 #ifdef CONFIG_PNP 526 527 static struct pnp_device_id cadet_pnp_devices[] = { 528 /* ADS Cadet AM/FM Radio Card */ 529 {.id = "MSM0c24", .driver_data = 0}, 530 {.id = ""} 531 }; 532 533 MODULE_DEVICE_TABLE(pnp, cadet_pnp_devices); 534 535 static int cadet_pnp_probe(struct pnp_dev *dev, const struct pnp_device_id *dev_id) 536 { 537 if (!dev) 538 return -ENODEV; 539 /* only support one device */ 540 if (io > 0) 541 return -EBUSY; 542 543 if (!pnp_port_valid(dev, 0)) 544 return -ENODEV; 545 546 io = pnp_port_start(dev, 0); 547 548 printk(KERN_INFO "radio-cadet: PnP reports device at %#x\n", io); 549 550 return io; 551 } 552 553 static struct pnp_driver cadet_pnp_driver = { 554 .name = "radio-cadet", 555 .id_table = cadet_pnp_devices, 556 .probe = cadet_pnp_probe, 557 .remove = NULL, 558 }; 559 560 #else 561 static struct pnp_driver cadet_pnp_driver; 562 #endif 563 564 static void cadet_probe(struct cadet *dev) 565 { 566 static int iovals[8] = { 0x330, 0x332, 0x334, 0x336, 0x338, 0x33a, 0x33c, 0x33e }; 567 int i; 568 569 for (i = 0; i < 8; i++) { 570 dev->io = iovals[i]; 571 if (request_region(dev->io, 2, "cadet-probe")) { 572 cadet_setfreq(dev, bands[1].rangelow); 573 if (cadet_getfreq(dev) == bands[1].rangelow) { 574 release_region(dev->io, 2); 575 return; 576 } 577 release_region(dev->io, 2); 578 } 579 } 580 dev->io = -1; 581 } 582 583 /* 584 * io should only be set if the user has used something like 585 * isapnp (the userspace program) to initialize this card for us 586 */ 587 588 static int __init cadet_init(void) 589 { 590 struct cadet *dev = &cadet_card; 591 struct v4l2_device *v4l2_dev = &dev->v4l2_dev; 592 struct v4l2_ctrl_handler *hdl; 593 int res = -ENODEV; 594 595 strlcpy(v4l2_dev->name, "cadet", sizeof(v4l2_dev->name)); 596 mutex_init(&dev->lock); 597 598 /* If a probe was requested then probe ISAPnP first (safest) */ 599 if (io < 0) 600 pnp_register_driver(&cadet_pnp_driver); 601 dev->io = io; 602 603 /* If that fails then probe unsafely if probe is requested */ 604 if (dev->io < 0) 605 cadet_probe(dev); 606 607 /* Else we bail out */ 608 if (dev->io < 0) { 609 #ifdef MODULE 610 v4l2_err(v4l2_dev, "you must set an I/O address with io=0x330, 0x332, 0x334,\n"); 611 v4l2_err(v4l2_dev, "0x336, 0x338, 0x33a, 0x33c or 0x33e\n"); 612 #endif 613 goto fail; 614 } 615 if (!request_region(dev->io, 2, "cadet")) 616 goto fail; 617 618 res = v4l2_device_register(NULL, v4l2_dev); 619 if (res < 0) { 620 release_region(dev->io, 2); 621 v4l2_err(v4l2_dev, "could not register v4l2_device\n"); 622 goto fail; 623 } 624 625 hdl = &dev->ctrl_handler; 626 v4l2_ctrl_handler_init(hdl, 2); 627 v4l2_ctrl_new_std(hdl, &cadet_ctrl_ops, 628 V4L2_CID_AUDIO_MUTE, 0, 1, 1, 1); 629 v4l2_dev->ctrl_handler = hdl; 630 if (hdl->error) { 631 res = hdl->error; 632 v4l2_err(v4l2_dev, "Could not register controls\n"); 633 goto err_hdl; 634 } 635 636 dev->is_fm_band = true; 637 dev->curfreq = bands[dev->is_fm_band].rangelow; 638 cadet_setfreq(dev, dev->curfreq); 639 strlcpy(dev->vdev.name, v4l2_dev->name, sizeof(dev->vdev.name)); 640 dev->vdev.v4l2_dev = v4l2_dev; 641 dev->vdev.fops = &cadet_fops; 642 dev->vdev.ioctl_ops = &cadet_ioctl_ops; 643 dev->vdev.release = video_device_release_empty; 644 dev->vdev.lock = &dev->lock; 645 set_bit(V4L2_FL_USE_FH_PRIO, &dev->vdev.flags); 646 video_set_drvdata(&dev->vdev, dev); 647 648 res = video_register_device(&dev->vdev, VFL_TYPE_RADIO, radio_nr); 649 if (res < 0) 650 goto err_hdl; 651 v4l2_info(v4l2_dev, "ADS Cadet Radio Card at 0x%x\n", dev->io); 652 return 0; 653 err_hdl: 654 v4l2_ctrl_handler_free(hdl); 655 v4l2_device_unregister(v4l2_dev); 656 release_region(dev->io, 2); 657 fail: 658 pnp_unregister_driver(&cadet_pnp_driver); 659 return res; 660 } 661 662 static void __exit cadet_exit(void) 663 { 664 struct cadet *dev = &cadet_card; 665 666 video_unregister_device(&dev->vdev); 667 v4l2_ctrl_handler_free(&dev->ctrl_handler); 668 v4l2_device_unregister(&dev->v4l2_dev); 669 outb(7, dev->io); /* Mute */ 670 outb(0x00, dev->io + 1); 671 release_region(dev->io, 2); 672 pnp_unregister_driver(&cadet_pnp_driver); 673 } 674 675 module_init(cadet_init); 676 module_exit(cadet_exit); 677 678