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33#include <linux/version.h>
34#include <linux/module.h>
35#include <linux/init.h>
36#include <linux/ioport.h>
37#include <linux/delay.h>
38#include <linux/videodev2.h>
39#include <linux/param.h>
40#include <linux/pnp.h>
41#include <linux/sched.h>
42#include <linux/io.h>
43#include <media/v4l2-device.h>
44#include <media/v4l2-ioctl.h>
45
46MODULE_AUTHOR("Fred Gleason, Russell Kroll, Quay Lu, Donald Song, Jason Lewis, Scott McGrath, William McGrath");
47MODULE_DESCRIPTION("A driver for the ADS Cadet AM/FM/RDS radio card.");
48MODULE_LICENSE("GPL");
49
50static int io = -1;
51static int radio_nr = -1;
52
53module_param(io, int, 0);
54MODULE_PARM_DESC(io, "I/O address of Cadet card (0x330,0x332,0x334,0x336,0x338,0x33a,0x33c,0x33e)");
55module_param(radio_nr, int, 0);
56
57#define CADET_VERSION KERNEL_VERSION(0, 3, 3)
58
59#define RDS_BUFFER 256
60#define RDS_RX_FLAG 1
61#define MBS_RX_FLAG 2
62
63struct cadet {
64 struct v4l2_device v4l2_dev;
65 struct video_device vdev;
66 int io;
67 int users;
68 int curtuner;
69 int tunestat;
70 int sigstrength;
71 wait_queue_head_t read_queue;
72 struct timer_list readtimer;
73 __u8 rdsin, rdsout, rdsstat;
74 unsigned char rdsbuf[RDS_BUFFER];
75 struct mutex lock;
76 int reading;
77};
78
79static struct cadet cadet_card;
80
81
82
83
84
85
86static __u16 sigtable[2][4] = {
87 { 5, 10, 30, 150 },
88 { 28, 40, 63, 1000 }
89};
90
91
92static int cadet_getstereo(struct cadet *dev)
93{
94 int ret = V4L2_TUNER_SUB_MONO;
95
96 if (dev->curtuner != 0)
97 return V4L2_TUNER_SUB_MONO;
98
99 mutex_lock(&dev->lock);
100 outb(7, dev->io);
101 if ((inb(dev->io + 1) & 0x40) == 0)
102 ret = V4L2_TUNER_SUB_STEREO;
103 mutex_unlock(&dev->lock);
104 return ret;
105}
106
107static unsigned cadet_gettune(struct cadet *dev)
108{
109 int curvol, i;
110 unsigned fifo = 0;
111
112
113
114
115
116 mutex_lock(&dev->lock);
117
118 outb(7, dev->io);
119 curvol = inb(dev->io + 1);
120 outb(0x00, dev->io + 1);
121 dev->tunestat = 0xffff;
122
123
124
125
126 for (i = 0; i < 25; i++) {
127 fifo = (fifo << 1) | ((inb(dev->io + 1) >> 7) & 0x01);
128 if (i < 24) {
129 outb(0x01, dev->io + 1);
130 dev->tunestat &= inb(dev->io + 1);
131 outb(0x00, dev->io + 1);
132 }
133 }
134
135
136
137
138 outb(curvol, dev->io + 1);
139 mutex_unlock(&dev->lock);
140
141 return fifo;
142}
143
144static unsigned cadet_getfreq(struct cadet *dev)
145{
146 int i;
147 unsigned freq = 0, test, fifo = 0;
148
149
150
151
152 fifo = cadet_gettune(dev);
153
154
155
156
157 if (dev->curtuner == 0) {
158 test = 12500;
159 for (i = 0; i < 14; i++) {
160 if ((fifo & 0x01) != 0)
161 freq += test;
162 test = test << 1;
163 fifo = fifo >> 1;
164 }
165 freq -= 10700000;
166 freq = (freq * 16) / 1000000;
167 }
168 if (dev->curtuner == 1)
169 freq = ((fifo & 0x7fff) - 2010) * 16;
170
171 return freq;
172}
173
174static void cadet_settune(struct cadet *dev, unsigned fifo)
175{
176 int i;
177 unsigned test;
178
179 mutex_lock(&dev->lock);
180
181 outb(7, dev->io);
182
183
184
185 test = 0;
186 test = (fifo >> 23) & 0x02;
187 test |= 0x1c;
188 outb(7, dev->io);
189 outb(test, dev->io + 1);
190 for (i = 0; i < 25; i++) {
191 test |= 0x01;
192 outb(test, dev->io + 1);
193 test &= 0xfe;
194 outb(test, dev->io + 1);
195 fifo = fifo << 1;
196 test = 0x1c | ((fifo >> 23) & 0x02);
197 outb(test, dev->io + 1);
198 }
199 mutex_unlock(&dev->lock);
200}
201
202static void cadet_setfreq(struct cadet *dev, unsigned freq)
203{
204 unsigned fifo;
205 int i, j, test;
206 int curvol;
207
208
209
210
211 fifo = 0;
212 if (dev->curtuner == 0) {
213 test = 102400;
214 freq = (freq * 1000) / 16;
215 freq += 10700;
216 for (i = 0; i < 14; i++) {
217 fifo = fifo << 1;
218 if (freq >= test) {
219 fifo |= 0x01;
220 freq -= test;
221 }
222 test = test >> 1;
223 }
224 }
225 if (dev->curtuner == 1) {
226 fifo = (freq / 16) + 2010;
227 fifo |= 0x100000;
228 }
229
230
231
232
233
234 mutex_lock(&dev->lock);
235 outb(7, dev->io);
236 curvol = inb(dev->io + 1);
237 mutex_unlock(&dev->lock);
238
239
240
241
242 for (j = 3; j > -1; j--) {
243 cadet_settune(dev, fifo | (j << 16));
244
245 mutex_lock(&dev->lock);
246 outb(7, dev->io);
247 outb(curvol, dev->io + 1);
248 mutex_unlock(&dev->lock);
249
250 msleep(100);
251
252 cadet_gettune(dev);
253 if ((dev->tunestat & 0x40) == 0) {
254 dev->sigstrength = sigtable[dev->curtuner][j];
255 return;
256 }
257 }
258 dev->sigstrength = 0;
259}
260
261
262static int cadet_getvol(struct cadet *dev)
263{
264 int ret = 0;
265
266 mutex_lock(&dev->lock);
267
268 outb(7, dev->io);
269 if ((inb(dev->io + 1) & 0x20) != 0)
270 ret = 0xffff;
271
272 mutex_unlock(&dev->lock);
273 return ret;
274}
275
276
277static void cadet_setvol(struct cadet *dev, int vol)
278{
279 mutex_lock(&dev->lock);
280 outb(7, dev->io);
281 if (vol > 0)
282 outb(0x20, dev->io + 1);
283 else
284 outb(0x00, dev->io + 1);
285 mutex_unlock(&dev->lock);
286}
287
288static void cadet_handler(unsigned long data)
289{
290 struct cadet *dev = (void *)data;
291
292
293 if (mutex_trylock(&dev->lock)) {
294 outb(0x3, dev->io);
295 if ((inb(dev->io + 1) & 0x20) != 0)
296 printk(KERN_CRIT "cadet: RDS fifo overflow\n");
297 outb(0x80, dev->io);
298 while ((inb(dev->io) & 0x80) != 0) {
299 dev->rdsbuf[dev->rdsin] = inb(dev->io + 1);
300 if (dev->rdsin == dev->rdsout)
301 printk(KERN_WARNING "cadet: RDS buffer overflow\n");
302 else
303 dev->rdsin++;
304 }
305 mutex_unlock(&dev->lock);
306 }
307
308
309
310
311 if (dev->rdsin != dev->rdsout)
312 wake_up_interruptible(&dev->read_queue);
313
314
315
316
317 init_timer(&dev->readtimer);
318 dev->readtimer.function = cadet_handler;
319 dev->readtimer.data = (unsigned long)0;
320 dev->readtimer.expires = jiffies + msecs_to_jiffies(50);
321 add_timer(&dev->readtimer);
322}
323
324
325static ssize_t cadet_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
326{
327 struct cadet *dev = video_drvdata(file);
328 unsigned char readbuf[RDS_BUFFER];
329 int i = 0;
330
331 if (dev->rdsstat == 0) {
332 mutex_lock(&dev->lock);
333 dev->rdsstat = 1;
334 outb(0x80, dev->io);
335 mutex_unlock(&dev->lock);
336 init_timer(&dev->readtimer);
337 dev->readtimer.function = cadet_handler;
338 dev->readtimer.data = (unsigned long)dev;
339 dev->readtimer.expires = jiffies + msecs_to_jiffies(50);
340 add_timer(&dev->readtimer);
341 }
342 if (dev->rdsin == dev->rdsout) {
343 if (file->f_flags & O_NONBLOCK)
344 return -EWOULDBLOCK;
345 interruptible_sleep_on(&dev->read_queue);
346 }
347 while (i < count && dev->rdsin != dev->rdsout)
348 readbuf[i++] = dev->rdsbuf[dev->rdsout++];
349
350 if (copy_to_user(data, readbuf, i))
351 return -EFAULT;
352 return i;
353}
354
355
356static int vidioc_querycap(struct file *file, void *priv,
357 struct v4l2_capability *v)
358{
359 strlcpy(v->driver, "ADS Cadet", sizeof(v->driver));
360 strlcpy(v->card, "ADS Cadet", sizeof(v->card));
361 strlcpy(v->bus_info, "ISA", sizeof(v->bus_info));
362 v->version = CADET_VERSION;
363 v->capabilities = V4L2_CAP_TUNER | V4L2_CAP_RADIO |
364 V4L2_CAP_READWRITE | V4L2_CAP_RDS_CAPTURE;
365 return 0;
366}
367
368static int vidioc_g_tuner(struct file *file, void *priv,
369 struct v4l2_tuner *v)
370{
371 struct cadet *dev = video_drvdata(file);
372
373 v->type = V4L2_TUNER_RADIO;
374 switch (v->index) {
375 case 0:
376 strlcpy(v->name, "FM", sizeof(v->name));
377 v->capability = V4L2_TUNER_CAP_STEREO | V4L2_TUNER_CAP_RDS;
378 v->rangelow = 1400;
379 v->rangehigh = 1728;
380 v->rxsubchans = cadet_getstereo(dev);
381 switch (v->rxsubchans) {
382 case V4L2_TUNER_SUB_MONO:
383 v->audmode = V4L2_TUNER_MODE_MONO;
384 break;
385 case V4L2_TUNER_SUB_STEREO:
386 v->audmode = V4L2_TUNER_MODE_STEREO;
387 break;
388 default:
389 break;
390 }
391 v->rxsubchans |= V4L2_TUNER_SUB_RDS;
392 break;
393 case 1:
394 strlcpy(v->name, "AM", sizeof(v->name));
395 v->capability = V4L2_TUNER_CAP_LOW;
396 v->rangelow = 8320;
397 v->rangehigh = 26400;
398 v->rxsubchans = V4L2_TUNER_SUB_MONO;
399 v->audmode = V4L2_TUNER_MODE_MONO;
400 break;
401 default:
402 return -EINVAL;
403 }
404 v->signal = dev->sigstrength;
405 return 0;
406}
407
408static int vidioc_s_tuner(struct file *file, void *priv,
409 struct v4l2_tuner *v)
410{
411 struct cadet *dev = video_drvdata(file);
412
413 if (v->index != 0 && v->index != 1)
414 return -EINVAL;
415 dev->curtuner = v->index;
416 return 0;
417}
418
419static int vidioc_g_frequency(struct file *file, void *priv,
420 struct v4l2_frequency *f)
421{
422 struct cadet *dev = video_drvdata(file);
423
424 f->tuner = dev->curtuner;
425 f->type = V4L2_TUNER_RADIO;
426 f->frequency = cadet_getfreq(dev);
427 return 0;
428}
429
430
431static int vidioc_s_frequency(struct file *file, void *priv,
432 struct v4l2_frequency *f)
433{
434 struct cadet *dev = video_drvdata(file);
435
436 if (f->type != V4L2_TUNER_RADIO)
437 return -EINVAL;
438 if (dev->curtuner == 0 && (f->frequency < 1400 || f->frequency > 1728))
439 return -EINVAL;
440 if (dev->curtuner == 1 && (f->frequency < 8320 || f->frequency > 26400))
441 return -EINVAL;
442 cadet_setfreq(dev, f->frequency);
443 return 0;
444}
445
446static int vidioc_queryctrl(struct file *file, void *priv,
447 struct v4l2_queryctrl *qc)
448{
449 switch (qc->id) {
450 case V4L2_CID_AUDIO_MUTE:
451 return v4l2_ctrl_query_fill(qc, 0, 1, 1, 1);
452 case V4L2_CID_AUDIO_VOLUME:
453 return v4l2_ctrl_query_fill(qc, 0, 0xff, 1, 0xff);
454 }
455 return -EINVAL;
456}
457
458static int vidioc_g_ctrl(struct file *file, void *priv,
459 struct v4l2_control *ctrl)
460{
461 struct cadet *dev = video_drvdata(file);
462
463 switch (ctrl->id) {
464 case V4L2_CID_AUDIO_MUTE:
465 ctrl->value = (cadet_getvol(dev) == 0);
466 break;
467 case V4L2_CID_AUDIO_VOLUME:
468 ctrl->value = cadet_getvol(dev);
469 break;
470 default:
471 return -EINVAL;
472 }
473 return 0;
474}
475
476static int vidioc_s_ctrl(struct file *file, void *priv,
477 struct v4l2_control *ctrl)
478{
479 struct cadet *dev = video_drvdata(file);
480
481 switch (ctrl->id){
482 case V4L2_CID_AUDIO_MUTE:
483 if (ctrl->value)
484 cadet_setvol(dev, 0);
485 else
486 cadet_setvol(dev, 0xffff);
487 break;
488 case V4L2_CID_AUDIO_VOLUME:
489 cadet_setvol(dev, ctrl->value);
490 break;
491 default:
492 return -EINVAL;
493 }
494 return 0;
495}
496
497static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
498{
499 *i = 0;
500 return 0;
501}
502
503static int vidioc_s_input(struct file *filp, void *priv, unsigned int i)
504{
505 return i ? -EINVAL : 0;
506}
507
508static int vidioc_g_audio(struct file *file, void *priv,
509 struct v4l2_audio *a)
510{
511 a->index = 0;
512 strlcpy(a->name, "Radio", sizeof(a->name));
513 a->capability = V4L2_AUDCAP_STEREO;
514 return 0;
515}
516
517static int vidioc_s_audio(struct file *file, void *priv,
518 struct v4l2_audio *a)
519{
520 return a->index ? -EINVAL : 0;
521}
522
523static int cadet_open(struct file *file)
524{
525 struct cadet *dev = video_drvdata(file);
526
527 dev->users++;
528 if (1 == dev->users)
529 init_waitqueue_head(&dev->read_queue);
530 return 0;
531}
532
533static int cadet_release(struct file *file)
534{
535 struct cadet *dev = video_drvdata(file);
536
537 dev->users--;
538 if (0 == dev->users) {
539 del_timer_sync(&dev->readtimer);
540 dev->rdsstat = 0;
541 }
542 return 0;
543}
544
545static unsigned int cadet_poll(struct file *file, struct poll_table_struct *wait)
546{
547 struct cadet *dev = video_drvdata(file);
548
549 poll_wait(file, &dev->read_queue, wait);
550 if (dev->rdsin != dev->rdsout)
551 return POLLIN | POLLRDNORM;
552 return 0;
553}
554
555
556static const struct v4l2_file_operations cadet_fops = {
557 .owner = THIS_MODULE,
558 .open = cadet_open,
559 .release = cadet_release,
560 .read = cadet_read,
561 .ioctl = video_ioctl2,
562 .poll = cadet_poll,
563};
564
565static const struct v4l2_ioctl_ops cadet_ioctl_ops = {
566 .vidioc_querycap = vidioc_querycap,
567 .vidioc_g_tuner = vidioc_g_tuner,
568 .vidioc_s_tuner = vidioc_s_tuner,
569 .vidioc_g_frequency = vidioc_g_frequency,
570 .vidioc_s_frequency = vidioc_s_frequency,
571 .vidioc_queryctrl = vidioc_queryctrl,
572 .vidioc_g_ctrl = vidioc_g_ctrl,
573 .vidioc_s_ctrl = vidioc_s_ctrl,
574 .vidioc_g_audio = vidioc_g_audio,
575 .vidioc_s_audio = vidioc_s_audio,
576 .vidioc_g_input = vidioc_g_input,
577 .vidioc_s_input = vidioc_s_input,
578};
579
580#ifdef CONFIG_PNP
581
582static struct pnp_device_id cadet_pnp_devices[] = {
583
584 {.id = "MSM0c24", .driver_data = 0},
585 {.id = ""}
586};
587
588MODULE_DEVICE_TABLE(pnp, cadet_pnp_devices);
589
590static int cadet_pnp_probe(struct pnp_dev *dev, const struct pnp_device_id *dev_id)
591{
592 if (!dev)
593 return -ENODEV;
594
595 if (io > 0)
596 return -EBUSY;
597
598 if (!pnp_port_valid(dev, 0))
599 return -ENODEV;
600
601 io = pnp_port_start(dev, 0);
602
603 printk(KERN_INFO "radio-cadet: PnP reports device at %#x\n", io);
604
605 return io;
606}
607
608static struct pnp_driver cadet_pnp_driver = {
609 .name = "radio-cadet",
610 .id_table = cadet_pnp_devices,
611 .probe = cadet_pnp_probe,
612 .remove = NULL,
613};
614
615#else
616static struct pnp_driver cadet_pnp_driver;
617#endif
618
619static void cadet_probe(struct cadet *dev)
620{
621 static int iovals[8] = { 0x330, 0x332, 0x334, 0x336, 0x338, 0x33a, 0x33c, 0x33e };
622 int i;
623
624 for (i = 0; i < 8; i++) {
625 dev->io = iovals[i];
626 if (request_region(dev->io, 2, "cadet-probe")) {
627 cadet_setfreq(dev, 1410);
628 if (cadet_getfreq(dev) == 1410) {
629 release_region(dev->io, 2);
630 return;
631 }
632 release_region(dev->io, 2);
633 }
634 }
635 dev->io = -1;
636}
637
638
639
640
641
642
643static int __init cadet_init(void)
644{
645 struct cadet *dev = &cadet_card;
646 struct v4l2_device *v4l2_dev = &dev->v4l2_dev;
647 int res;
648
649 strlcpy(v4l2_dev->name, "cadet", sizeof(v4l2_dev->name));
650 mutex_init(&dev->lock);
651
652
653 if (io < 0)
654 pnp_register_driver(&cadet_pnp_driver);
655 dev->io = io;
656
657
658 if (dev->io < 0)
659 cadet_probe(dev);
660
661
662 if (dev->io < 0) {
663#ifdef MODULE
664 v4l2_err(v4l2_dev, "you must set an I/O address with io=0x330, 0x332, 0x334,\n");
665 v4l2_err(v4l2_dev, "0x336, 0x338, 0x33a, 0x33c or 0x33e\n");
666#endif
667 goto fail;
668 }
669 if (!request_region(dev->io, 2, "cadet"))
670 goto fail;
671
672 res = v4l2_device_register(NULL, v4l2_dev);
673 if (res < 0) {
674 release_region(dev->io, 2);
675 v4l2_err(v4l2_dev, "could not register v4l2_device\n");
676 goto fail;
677 }
678
679 strlcpy(dev->vdev.name, v4l2_dev->name, sizeof(dev->vdev.name));
680 dev->vdev.v4l2_dev = v4l2_dev;
681 dev->vdev.fops = &cadet_fops;
682 dev->vdev.ioctl_ops = &cadet_ioctl_ops;
683 dev->vdev.release = video_device_release_empty;
684 video_set_drvdata(&dev->vdev, dev);
685
686 if (video_register_device(&dev->vdev, VFL_TYPE_RADIO, radio_nr) < 0) {
687 v4l2_device_unregister(v4l2_dev);
688 release_region(dev->io, 2);
689 goto fail;
690 }
691 v4l2_info(v4l2_dev, "ADS Cadet Radio Card at 0x%x\n", dev->io);
692 return 0;
693fail:
694 pnp_unregister_driver(&cadet_pnp_driver);
695 return -ENODEV;
696}
697
698static void __exit cadet_exit(void)
699{
700 struct cadet *dev = &cadet_card;
701
702 video_unregister_device(&dev->vdev);
703 v4l2_device_unregister(&dev->v4l2_dev);
704 release_region(dev->io, 2);
705 pnp_unregister_driver(&cadet_pnp_driver);
706}
707
708module_init(cadet_init);
709module_exit(cadet_exit);
710
711