1 // SPDX-License-Identifier: GPL-2.0-only
2 /* radio-cadet.c - A video4linux driver for the ADS Cadet AM/FM Radio Card
3 *
4 * by Fred Gleason <fredg@wava.com>
5 * Version 0.3.3
6 *
7 * (Loosely) based on code for the Aztech radio card by
8 *
9 * Russell Kroll (rkroll@exploits.org)
10 * Quay Ly
11 * Donald Song
12 * Jason Lewis (jlewis@twilight.vtc.vsc.edu)
13 * Scott McGrath (smcgrath@twilight.vtc.vsc.edu)
14 * William McGrath (wmcgrath@twilight.vtc.vsc.edu)
15 *
16 * History:
17 * 2000-04-29 Russell Kroll <rkroll@exploits.org>
18 * Added ISAPnP detection for Linux 2.3/2.4
19 *
20 * 2001-01-10 Russell Kroll <rkroll@exploits.org>
21 * Removed dead CONFIG_RADIO_CADET_PORT code
22 * PnP detection on load is now default (no args necessary)
23 *
24 * 2002-01-17 Adam Belay <ambx1@neo.rr.com>
25 * Updated to latest pnp code
26 *
27 * 2003-01-31 Alan Cox <alan@lxorguk.ukuu.org.uk>
28 * Cleaned up locking, delay code, general odds and ends
29 *
30 * 2006-07-30 Hans J. Koch <koch@hjk-az.de>
31 * Changed API to V4L2
32 */
33
34 #include <linux/module.h> /* Modules */
35 #include <linux/init.h> /* Initdata */
36 #include <linux/ioport.h> /* request_region */
37 #include <linux/delay.h> /* udelay */
38 #include <linux/videodev2.h> /* V4L2 API defs */
39 #include <linux/param.h>
40 #include <linux/pnp.h>
41 #include <linux/sched.h>
42 #include <linux/io.h> /* outb, outb_p */
43 #include <media/v4l2-device.h>
44 #include <media/v4l2-ioctl.h>
45 #include <media/v4l2-ctrls.h>
46 #include <media/v4l2-fh.h>
47 #include <media/v4l2-event.h>
48
49 MODULE_AUTHOR("Fred Gleason, Russell Kroll, Quay Lu, Donald Song, Jason Lewis, Scott McGrath, William McGrath");
50 MODULE_DESCRIPTION("A driver for the ADS Cadet AM/FM/RDS radio card.");
51 MODULE_LICENSE("GPL");
52 MODULE_VERSION("0.3.4");
53
54 static int io = -1; /* default to isapnp activation */
55 static int radio_nr = -1;
56
57 module_param(io, int, 0);
58 MODULE_PARM_DESC(io, "I/O address of Cadet card (0x330,0x332,0x334,0x336,0x338,0x33a,0x33c,0x33e)");
59 module_param(radio_nr, int, 0);
60
61 #define RDS_BUFFER 256
62 #define RDS_RX_FLAG 1
63 #define MBS_RX_FLAG 2
64
65 struct cadet {
66 struct v4l2_device v4l2_dev;
67 struct video_device vdev;
68 struct v4l2_ctrl_handler ctrl_handler;
69 int io;
70 bool is_fm_band;
71 u32 curfreq;
72 int tunestat;
73 int sigstrength;
74 wait_queue_head_t read_queue;
75 struct timer_list readtimer;
76 u8 rdsin, rdsout, rdsstat;
77 unsigned char rdsbuf[RDS_BUFFER];
78 struct mutex lock;
79 int reading;
80 };
81
82 static struct cadet cadet_card;
83
84 /*
85 * Signal Strength Threshold Values
86 * The V4L API spec does not define any particular unit for the signal
87 * strength value. These values are in microvolts of RF at the tuner's input.
88 */
89 static u16 sigtable[2][4] = {
90 { 1835, 2621, 4128, 65535 },
91 { 2185, 4369, 13107, 65535 },
92 };
93
94 static const struct v4l2_frequency_band bands[] = {
95 {
96 .index = 0,
97 .type = V4L2_TUNER_RADIO,
98 .capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_FREQ_BANDS,
99 .rangelow = 8320, /* 520 kHz */
100 .rangehigh = 26400, /* 1650 kHz */
101 .modulation = V4L2_BAND_MODULATION_AM,
102 }, {
103 .index = 1,
104 .type = V4L2_TUNER_RADIO,
105 .capability = V4L2_TUNER_CAP_STEREO | V4L2_TUNER_CAP_RDS |
106 V4L2_TUNER_CAP_RDS_BLOCK_IO | V4L2_TUNER_CAP_LOW |
107 V4L2_TUNER_CAP_FREQ_BANDS,
108 .rangelow = 1400000, /* 87.5 MHz */
109 .rangehigh = 1728000, /* 108.0 MHz */
110 .modulation = V4L2_BAND_MODULATION_FM,
111 },
112 };
113
114
cadet_getstereo(struct cadet * dev)115 static int cadet_getstereo(struct cadet *dev)
116 {
117 int ret = V4L2_TUNER_SUB_MONO;
118
119 if (!dev->is_fm_band) /* Only FM has stereo capability! */
120 return V4L2_TUNER_SUB_MONO;
121
122 outb(7, dev->io); /* Select tuner control */
123 if ((inb(dev->io + 1) & 0x40) == 0)
124 ret = V4L2_TUNER_SUB_STEREO;
125 return ret;
126 }
127
cadet_gettune(struct cadet * dev)128 static unsigned cadet_gettune(struct cadet *dev)
129 {
130 int curvol, i;
131 unsigned fifo = 0;
132
133 /*
134 * Prepare for read
135 */
136
137 outb(7, dev->io); /* Select tuner control */
138 curvol = inb(dev->io + 1); /* Save current volume/mute setting */
139 outb(0x00, dev->io + 1); /* Ensure WRITE-ENABLE is LOW */
140 dev->tunestat = 0xffff;
141
142 /*
143 * Read the shift register
144 */
145 for (i = 0; i < 25; i++) {
146 fifo = (fifo << 1) | ((inb(dev->io + 1) >> 7) & 0x01);
147 if (i < 24) {
148 outb(0x01, dev->io + 1);
149 dev->tunestat &= inb(dev->io + 1);
150 outb(0x00, dev->io + 1);
151 }
152 }
153
154 /*
155 * Restore volume/mute setting
156 */
157 outb(curvol, dev->io + 1);
158 return fifo;
159 }
160
cadet_getfreq(struct cadet * dev)161 static unsigned cadet_getfreq(struct cadet *dev)
162 {
163 int i;
164 unsigned freq = 0, test, fifo = 0;
165
166 /*
167 * Read current tuning
168 */
169 fifo = cadet_gettune(dev);
170
171 /*
172 * Convert to actual frequency
173 */
174 if (!dev->is_fm_band) /* AM */
175 return ((fifo & 0x7fff) - 450) * 16;
176
177 test = 12500;
178 for (i = 0; i < 14; i++) {
179 if ((fifo & 0x01) != 0)
180 freq += test;
181 test = test << 1;
182 fifo = fifo >> 1;
183 }
184 freq -= 10700000; /* IF frequency is 10.7 MHz */
185 freq = (freq * 16) / 1000; /* Make it 1/16 kHz */
186 return freq;
187 }
188
cadet_settune(struct cadet * dev,unsigned fifo)189 static void cadet_settune(struct cadet *dev, unsigned fifo)
190 {
191 int i;
192 unsigned test;
193
194 outb(7, dev->io); /* Select tuner control */
195 /*
196 * Write the shift register
197 */
198 test = 0;
199 test = (fifo >> 23) & 0x02; /* Align data for SDO */
200 test |= 0x1c; /* SDM=1, SWE=1, SEN=1, SCK=0 */
201 outb(7, dev->io); /* Select tuner control */
202 outb(test, dev->io + 1); /* Initialize for write */
203 for (i = 0; i < 25; i++) {
204 test |= 0x01; /* Toggle SCK High */
205 outb(test, dev->io + 1);
206 test &= 0xfe; /* Toggle SCK Low */
207 outb(test, dev->io + 1);
208 fifo = fifo << 1; /* Prepare the next bit */
209 test = 0x1c | ((fifo >> 23) & 0x02);
210 outb(test, dev->io + 1);
211 }
212 }
213
cadet_setfreq(struct cadet * dev,unsigned freq)214 static void cadet_setfreq(struct cadet *dev, unsigned freq)
215 {
216 unsigned fifo;
217 int i, j, test;
218 int curvol;
219
220 freq = clamp(freq, bands[dev->is_fm_band].rangelow,
221 bands[dev->is_fm_band].rangehigh);
222 dev->curfreq = freq;
223 /*
224 * Formulate a fifo command
225 */
226 fifo = 0;
227 if (dev->is_fm_band) { /* FM */
228 test = 102400;
229 freq = freq / 16; /* Make it kHz */
230 freq += 10700; /* IF is 10700 kHz */
231 for (i = 0; i < 14; i++) {
232 fifo = fifo << 1;
233 if (freq >= test) {
234 fifo |= 0x01;
235 freq -= test;
236 }
237 test = test >> 1;
238 }
239 } else { /* AM */
240 fifo = (freq / 16) + 450; /* Make it kHz */
241 fifo |= 0x100000; /* Select AM Band */
242 }
243
244 /*
245 * Save current volume/mute setting
246 */
247
248 outb(7, dev->io); /* Select tuner control */
249 curvol = inb(dev->io + 1);
250
251 /*
252 * Tune the card
253 */
254 for (j = 3; j > -1; j--) {
255 cadet_settune(dev, fifo | (j << 16));
256
257 outb(7, dev->io); /* Select tuner control */
258 outb(curvol, dev->io + 1);
259
260 msleep(100);
261
262 cadet_gettune(dev);
263 if ((dev->tunestat & 0x40) == 0) { /* Tuned */
264 dev->sigstrength = sigtable[dev->is_fm_band][j];
265 goto reset_rds;
266 }
267 }
268 dev->sigstrength = 0;
269 reset_rds:
270 outb(3, dev->io);
271 outb(inb(dev->io + 1) & 0x7f, dev->io + 1);
272 }
273
cadet_has_rds_data(struct cadet * dev)274 static bool cadet_has_rds_data(struct cadet *dev)
275 {
276 bool result;
277
278 mutex_lock(&dev->lock);
279 result = dev->rdsin != dev->rdsout;
280 mutex_unlock(&dev->lock);
281 return result;
282 }
283
284
cadet_handler(struct timer_list * t)285 static void cadet_handler(struct timer_list *t)
286 {
287 struct cadet *dev = from_timer(dev, t, readtimer);
288
289 /* Service the RDS fifo */
290 if (mutex_trylock(&dev->lock)) {
291 outb(0x3, dev->io); /* Select RDS Decoder Control */
292 if ((inb(dev->io + 1) & 0x20) != 0)
293 pr_err("cadet: RDS fifo overflow\n");
294 outb(0x80, dev->io); /* Select RDS fifo */
295
296 while ((inb(dev->io) & 0x80) != 0) {
297 dev->rdsbuf[dev->rdsin] = inb(dev->io + 1);
298 if (dev->rdsin + 1 != dev->rdsout)
299 dev->rdsin++;
300 }
301 mutex_unlock(&dev->lock);
302 }
303
304 /*
305 * Service pending read
306 */
307 if (cadet_has_rds_data(dev))
308 wake_up_interruptible(&dev->read_queue);
309
310 /*
311 * Clean up and exit
312 */
313 dev->readtimer.expires = jiffies + msecs_to_jiffies(50);
314 add_timer(&dev->readtimer);
315 }
316
cadet_start_rds(struct cadet * dev)317 static void cadet_start_rds(struct cadet *dev)
318 {
319 dev->rdsstat = 1;
320 outb(0x80, dev->io); /* Select RDS fifo */
321 timer_setup(&dev->readtimer, cadet_handler, 0);
322 dev->readtimer.expires = jiffies + msecs_to_jiffies(50);
323 add_timer(&dev->readtimer);
324 }
325
cadet_read(struct file * file,char __user * data,size_t count,loff_t * ppos)326 static ssize_t cadet_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
327 {
328 struct cadet *dev = video_drvdata(file);
329 unsigned char readbuf[RDS_BUFFER];
330 int i = 0;
331
332 mutex_lock(&dev->lock);
333 if (dev->rdsstat == 0)
334 cadet_start_rds(dev);
335 mutex_unlock(&dev->lock);
336
337 if (!cadet_has_rds_data(dev) && (file->f_flags & O_NONBLOCK))
338 return -EWOULDBLOCK;
339 i = wait_event_interruptible(dev->read_queue, cadet_has_rds_data(dev));
340 if (i)
341 return i;
342
343 mutex_lock(&dev->lock);
344 while (i < count && dev->rdsin != dev->rdsout)
345 readbuf[i++] = dev->rdsbuf[dev->rdsout++];
346 mutex_unlock(&dev->lock);
347
348 if (i && copy_to_user(data, readbuf, i))
349 return -EFAULT;
350 return i;
351 }
352
353
vidioc_querycap(struct file * file,void * priv,struct v4l2_capability * v)354 static int vidioc_querycap(struct file *file, void *priv,
355 struct v4l2_capability *v)
356 {
357 strscpy(v->driver, "ADS Cadet", sizeof(v->driver));
358 strscpy(v->card, "ADS Cadet", sizeof(v->card));
359 strscpy(v->bus_info, "ISA:radio-cadet", sizeof(v->bus_info));
360 return 0;
361 }
362
vidioc_g_tuner(struct file * file,void * priv,struct v4l2_tuner * v)363 static int vidioc_g_tuner(struct file *file, void *priv,
364 struct v4l2_tuner *v)
365 {
366 struct cadet *dev = video_drvdata(file);
367
368 if (v->index)
369 return -EINVAL;
370 v->type = V4L2_TUNER_RADIO;
371 strscpy(v->name, "Radio", sizeof(v->name));
372 v->capability = bands[0].capability | bands[1].capability;
373 v->rangelow = bands[0].rangelow; /* 520 kHz (start of AM band) */
374 v->rangehigh = bands[1].rangehigh; /* 108.0 MHz (end of FM band) */
375 if (dev->is_fm_band) {
376 v->rxsubchans = cadet_getstereo(dev);
377 outb(3, dev->io);
378 outb(inb(dev->io + 1) & 0x7f, dev->io + 1);
379 mdelay(100);
380 outb(3, dev->io);
381 if (inb(dev->io + 1) & 0x80)
382 v->rxsubchans |= V4L2_TUNER_SUB_RDS;
383 } else {
384 v->rangelow = 8320; /* 520 kHz */
385 v->rangehigh = 26400; /* 1650 kHz */
386 v->rxsubchans = V4L2_TUNER_SUB_MONO;
387 }
388 v->audmode = V4L2_TUNER_MODE_STEREO;
389 v->signal = dev->sigstrength; /* We might need to modify scaling of this */
390 return 0;
391 }
392
vidioc_s_tuner(struct file * file,void * priv,const struct v4l2_tuner * v)393 static int vidioc_s_tuner(struct file *file, void *priv,
394 const struct v4l2_tuner *v)
395 {
396 return v->index ? -EINVAL : 0;
397 }
398
vidioc_enum_freq_bands(struct file * file,void * priv,struct v4l2_frequency_band * band)399 static int vidioc_enum_freq_bands(struct file *file, void *priv,
400 struct v4l2_frequency_band *band)
401 {
402 if (band->tuner)
403 return -EINVAL;
404 if (band->index >= ARRAY_SIZE(bands))
405 return -EINVAL;
406 *band = bands[band->index];
407 return 0;
408 }
409
vidioc_g_frequency(struct file * file,void * priv,struct v4l2_frequency * f)410 static int vidioc_g_frequency(struct file *file, void *priv,
411 struct v4l2_frequency *f)
412 {
413 struct cadet *dev = video_drvdata(file);
414
415 if (f->tuner)
416 return -EINVAL;
417 f->type = V4L2_TUNER_RADIO;
418 f->frequency = dev->curfreq;
419 return 0;
420 }
421
422
vidioc_s_frequency(struct file * file,void * priv,const struct v4l2_frequency * f)423 static int vidioc_s_frequency(struct file *file, void *priv,
424 const struct v4l2_frequency *f)
425 {
426 struct cadet *dev = video_drvdata(file);
427
428 if (f->tuner)
429 return -EINVAL;
430 dev->is_fm_band =
431 f->frequency >= (bands[0].rangehigh + bands[1].rangelow) / 2;
432 cadet_setfreq(dev, f->frequency);
433 return 0;
434 }
435
cadet_s_ctrl(struct v4l2_ctrl * ctrl)436 static int cadet_s_ctrl(struct v4l2_ctrl *ctrl)
437 {
438 struct cadet *dev = container_of(ctrl->handler, struct cadet, ctrl_handler);
439
440 switch (ctrl->id) {
441 case V4L2_CID_AUDIO_MUTE:
442 outb(7, dev->io); /* Select tuner control */
443 if (ctrl->val)
444 outb(0x00, dev->io + 1);
445 else
446 outb(0x20, dev->io + 1);
447 return 0;
448 }
449 return -EINVAL;
450 }
451
cadet_open(struct file * file)452 static int cadet_open(struct file *file)
453 {
454 struct cadet *dev = video_drvdata(file);
455 int err;
456
457 mutex_lock(&dev->lock);
458 err = v4l2_fh_open(file);
459 if (err)
460 goto fail;
461 if (v4l2_fh_is_singular_file(file))
462 init_waitqueue_head(&dev->read_queue);
463 fail:
464 mutex_unlock(&dev->lock);
465 return err;
466 }
467
cadet_release(struct file * file)468 static int cadet_release(struct file *file)
469 {
470 struct cadet *dev = video_drvdata(file);
471
472 mutex_lock(&dev->lock);
473 if (v4l2_fh_is_singular_file(file) && dev->rdsstat) {
474 del_timer_sync(&dev->readtimer);
475 dev->rdsstat = 0;
476 }
477 v4l2_fh_release(file);
478 mutex_unlock(&dev->lock);
479 return 0;
480 }
481
cadet_poll(struct file * file,struct poll_table_struct * wait)482 static __poll_t cadet_poll(struct file *file, struct poll_table_struct *wait)
483 {
484 struct cadet *dev = video_drvdata(file);
485 __poll_t req_events = poll_requested_events(wait);
486 __poll_t res = v4l2_ctrl_poll(file, wait);
487
488 poll_wait(file, &dev->read_queue, wait);
489 if (dev->rdsstat == 0 && (req_events & (EPOLLIN | EPOLLRDNORM))) {
490 mutex_lock(&dev->lock);
491 if (dev->rdsstat == 0)
492 cadet_start_rds(dev);
493 mutex_unlock(&dev->lock);
494 }
495 if (cadet_has_rds_data(dev))
496 res |= EPOLLIN | EPOLLRDNORM;
497 return res;
498 }
499
500
501 static const struct v4l2_file_operations cadet_fops = {
502 .owner = THIS_MODULE,
503 .open = cadet_open,
504 .release = cadet_release,
505 .read = cadet_read,
506 .unlocked_ioctl = video_ioctl2,
507 .poll = cadet_poll,
508 };
509
510 static const struct v4l2_ioctl_ops cadet_ioctl_ops = {
511 .vidioc_querycap = vidioc_querycap,
512 .vidioc_g_tuner = vidioc_g_tuner,
513 .vidioc_s_tuner = vidioc_s_tuner,
514 .vidioc_g_frequency = vidioc_g_frequency,
515 .vidioc_s_frequency = vidioc_s_frequency,
516 .vidioc_enum_freq_bands = vidioc_enum_freq_bands,
517 .vidioc_log_status = v4l2_ctrl_log_status,
518 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
519 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
520 };
521
522 static const struct v4l2_ctrl_ops cadet_ctrl_ops = {
523 .s_ctrl = cadet_s_ctrl,
524 };
525
526 #ifdef CONFIG_PNP
527
528 static const struct pnp_device_id cadet_pnp_devices[] = {
529 /* ADS Cadet AM/FM Radio Card */
530 {.id = "MSM0c24", .driver_data = 0},
531 {.id = ""}
532 };
533
534 MODULE_DEVICE_TABLE(pnp, cadet_pnp_devices);
535
cadet_pnp_probe(struct pnp_dev * dev,const struct pnp_device_id * dev_id)536 static int cadet_pnp_probe(struct pnp_dev *dev, const struct pnp_device_id *dev_id)
537 {
538 if (!dev)
539 return -ENODEV;
540 /* only support one device */
541 if (io > 0)
542 return -EBUSY;
543
544 if (!pnp_port_valid(dev, 0))
545 return -ENODEV;
546
547 io = pnp_port_start(dev, 0);
548
549 printk(KERN_INFO "radio-cadet: PnP reports device at %#x\n", io);
550
551 return io;
552 }
553
554 static struct pnp_driver cadet_pnp_driver = {
555 .name = "radio-cadet",
556 .id_table = cadet_pnp_devices,
557 .probe = cadet_pnp_probe,
558 .remove = NULL,
559 };
560
561 #else
562 static struct pnp_driver cadet_pnp_driver;
563 #endif
564
cadet_probe(struct cadet * dev)565 static void cadet_probe(struct cadet *dev)
566 {
567 static int iovals[8] = { 0x330, 0x332, 0x334, 0x336, 0x338, 0x33a, 0x33c, 0x33e };
568 int i;
569
570 for (i = 0; i < 8; i++) {
571 dev->io = iovals[i];
572 if (request_region(dev->io, 2, "cadet-probe")) {
573 cadet_setfreq(dev, bands[1].rangelow);
574 if (cadet_getfreq(dev) == bands[1].rangelow) {
575 release_region(dev->io, 2);
576 return;
577 }
578 release_region(dev->io, 2);
579 }
580 }
581 dev->io = -1;
582 }
583
584 /*
585 * io should only be set if the user has used something like
586 * isapnp (the userspace program) to initialize this card for us
587 */
588
cadet_init(void)589 static int __init cadet_init(void)
590 {
591 struct cadet *dev = &cadet_card;
592 struct v4l2_device *v4l2_dev = &dev->v4l2_dev;
593 struct v4l2_ctrl_handler *hdl;
594 int res = -ENODEV;
595
596 strscpy(v4l2_dev->name, "cadet", sizeof(v4l2_dev->name));
597 mutex_init(&dev->lock);
598
599 /* If a probe was requested then probe ISAPnP first (safest) */
600 if (io < 0)
601 pnp_register_driver(&cadet_pnp_driver);
602 dev->io = io;
603
604 /* If that fails then probe unsafely if probe is requested */
605 if (dev->io < 0)
606 cadet_probe(dev);
607
608 /* Else we bail out */
609 if (dev->io < 0) {
610 #ifdef MODULE
611 v4l2_err(v4l2_dev, "you must set an I/O address with io=0x330, 0x332, 0x334,\n");
612 v4l2_err(v4l2_dev, "0x336, 0x338, 0x33a, 0x33c or 0x33e\n");
613 #endif
614 goto fail;
615 }
616 if (!request_region(dev->io, 2, "cadet"))
617 goto fail;
618
619 res = v4l2_device_register(NULL, v4l2_dev);
620 if (res < 0) {
621 release_region(dev->io, 2);
622 v4l2_err(v4l2_dev, "could not register v4l2_device\n");
623 goto fail;
624 }
625
626 hdl = &dev->ctrl_handler;
627 v4l2_ctrl_handler_init(hdl, 2);
628 v4l2_ctrl_new_std(hdl, &cadet_ctrl_ops,
629 V4L2_CID_AUDIO_MUTE, 0, 1, 1, 1);
630 v4l2_dev->ctrl_handler = hdl;
631 if (hdl->error) {
632 res = hdl->error;
633 v4l2_err(v4l2_dev, "Could not register controls\n");
634 goto err_hdl;
635 }
636
637 dev->is_fm_band = true;
638 dev->curfreq = bands[dev->is_fm_band].rangelow;
639 cadet_setfreq(dev, dev->curfreq);
640 strscpy(dev->vdev.name, v4l2_dev->name, sizeof(dev->vdev.name));
641 dev->vdev.v4l2_dev = v4l2_dev;
642 dev->vdev.fops = &cadet_fops;
643 dev->vdev.ioctl_ops = &cadet_ioctl_ops;
644 dev->vdev.release = video_device_release_empty;
645 dev->vdev.lock = &dev->lock;
646 dev->vdev.device_caps = V4L2_CAP_TUNER | V4L2_CAP_RADIO |
647 V4L2_CAP_READWRITE | V4L2_CAP_RDS_CAPTURE;
648 video_set_drvdata(&dev->vdev, dev);
649
650 res = video_register_device(&dev->vdev, VFL_TYPE_RADIO, radio_nr);
651 if (res < 0)
652 goto err_hdl;
653 v4l2_info(v4l2_dev, "ADS Cadet Radio Card at 0x%x\n", dev->io);
654 return 0;
655 err_hdl:
656 v4l2_ctrl_handler_free(hdl);
657 v4l2_device_unregister(v4l2_dev);
658 release_region(dev->io, 2);
659 fail:
660 pnp_unregister_driver(&cadet_pnp_driver);
661 return res;
662 }
663
cadet_exit(void)664 static void __exit cadet_exit(void)
665 {
666 struct cadet *dev = &cadet_card;
667
668 video_unregister_device(&dev->vdev);
669 v4l2_ctrl_handler_free(&dev->ctrl_handler);
670 v4l2_device_unregister(&dev->v4l2_dev);
671 outb(7, dev->io); /* Mute */
672 outb(0x00, dev->io + 1);
673 release_region(dev->io, 2);
674 pnp_unregister_driver(&cadet_pnp_driver);
675 }
676
677 module_init(cadet_init);
678 module_exit(cadet_exit);
679
680