1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29#include <linux/module.h>
30#include <linux/init.h>
31#include <linux/io.h>
32#include <linux/delay.h>
33#include <linux/videodev2.h>
34#include <linux/kthread.h>
35#include <media/v4l2-device.h>
36#include <media/v4l2-ioctl.h>
37#include <media/v4l2-ctrls.h>
38#include <media/v4l2-fh.h>
39#include <media/v4l2-event.h>
40#include <sound/aci.h>
41
42#define RDS_DATASHIFT 2
43#define RDS_DATAMASK (1 << RDS_DATASHIFT)
44#define RDS_BUSYMASK 0x10
45#define RDS_CLOCKMASK 0x08
46#define RDS_DATA(x) (((x) >> RDS_DATASHIFT) & 1)
47
48#define RDS_STATUS 0x01
49#define RDS_STATIONNAME 0x02
50#define RDS_TEXT 0x03
51#define RDS_ALTFREQ 0x04
52#define RDS_TIMEDATE 0x05
53#define RDS_PI_CODE 0x06
54#define RDS_PTYTATP 0x07
55#define RDS_RESET 0x08
56#define RDS_RXVALUE 0x09
57
58static int radio_nr = -1;
59module_param(radio_nr, int, 0);
60MODULE_PARM_DESC(radio_nr, "Set radio device number (/dev/radioX). Default: -1 (autodetect)");
61
62struct pcm20 {
63 struct v4l2_device v4l2_dev;
64 struct video_device vdev;
65 struct v4l2_ctrl_handler ctrl_handler;
66 struct v4l2_ctrl *rds_pty;
67 struct v4l2_ctrl *rds_ps_name;
68 struct v4l2_ctrl *rds_radio_test;
69 struct v4l2_ctrl *rds_ta;
70 struct v4l2_ctrl *rds_tp;
71 struct v4l2_ctrl *rds_ms;
72
73 struct task_struct *kthread;
74 unsigned long freq;
75 u32 audmode;
76 struct snd_miro_aci *aci;
77 struct mutex lock;
78};
79
80static struct pcm20 pcm20_card = {
81 .freq = 87 * 16000,
82 .audmode = V4L2_TUNER_MODE_STEREO,
83};
84
85
86static int rds_waitread(struct snd_miro_aci *aci)
87{
88 u8 byte;
89 int i = 2000;
90
91 do {
92 byte = inb(aci->aci_port + ACI_REG_RDS);
93 i--;
94 } while ((byte & RDS_BUSYMASK) && i);
95
96
97
98
99
100
101 udelay(1);
102 return i ? byte : -1;
103}
104
105static int rds_rawwrite(struct snd_miro_aci *aci, u8 byte)
106{
107 if (rds_waitread(aci) >= 0) {
108 outb(byte, aci->aci_port + ACI_REG_RDS);
109 return 0;
110 }
111 return -1;
112}
113
114static int rds_write(struct snd_miro_aci *aci, u8 byte)
115{
116 u8 sendbuffer[8];
117 int i;
118
119 for (i = 7; i >= 0; i--)
120 sendbuffer[7 - i] = (byte & (1 << i)) ? RDS_DATAMASK : 0;
121 sendbuffer[0] |= RDS_CLOCKMASK;
122
123 for (i = 0; i < 8; i++)
124 rds_rawwrite(aci, sendbuffer[i]);
125 return 0;
126}
127
128static int rds_readcycle_nowait(struct snd_miro_aci *aci)
129{
130 outb(0, aci->aci_port + ACI_REG_RDS);
131 return rds_waitread(aci);
132}
133
134static int rds_readcycle(struct snd_miro_aci *aci)
135{
136 if (rds_rawwrite(aci, 0) < 0)
137 return -1;
138 return rds_waitread(aci);
139}
140
141static int rds_ack(struct snd_miro_aci *aci)
142{
143 int i = rds_readcycle(aci);
144
145 if (i < 0)
146 return -1;
147 if (i & RDS_DATAMASK)
148 return 0;
149 return 1;
150}
151
152static int rds_cmd(struct snd_miro_aci *aci, u8 cmd, u8 databuffer[], u8 datasize)
153{
154 int i, j;
155
156 rds_write(aci, cmd);
157
158
159 if (cmd == RDS_RESET)
160 return 0;
161 if (rds_ack(aci))
162 return -EIO;
163 if (datasize == 0)
164 return 0;
165
166
167
168 if (rds_waitread(aci) < 0)
169 return -1;
170
171 memset(databuffer, 0, datasize);
172
173 for (i = 0; i < 8 * datasize; i++) {
174 j = rds_readcycle_nowait(aci);
175 if (j < 0)
176 return -EIO;
177 databuffer[i / 8] |= RDS_DATA(j) << (7 - (i % 8));
178 }
179 return 0;
180}
181
182static int pcm20_setfreq(struct pcm20 *dev, unsigned long freq)
183{
184 unsigned char freql;
185 unsigned char freqh;
186 struct snd_miro_aci *aci = dev->aci;
187
188 freq /= 160;
189 if (!(aci->aci_version == 0x07 || aci->aci_version >= 0xb0))
190 freq /= 10;
191
192 freql = freq & 0xff;
193 freqh = freq >> 8;
194
195 rds_cmd(aci, RDS_RESET, NULL, 0);
196 return snd_aci_cmd(aci, ACI_WRITE_TUNE, freql, freqh);
197}
198
199static int vidioc_querycap(struct file *file, void *priv,
200 struct v4l2_capability *v)
201{
202 struct pcm20 *dev = video_drvdata(file);
203
204 strscpy(v->driver, "Miro PCM20", sizeof(v->driver));
205 strscpy(v->card, "Miro PCM20", sizeof(v->card));
206 snprintf(v->bus_info, sizeof(v->bus_info), "ISA:%s", dev->v4l2_dev.name);
207 return 0;
208}
209
210static bool sanitize(char *p, int size)
211{
212 int i;
213 bool ret = true;
214
215 for (i = 0; i < size; i++) {
216 if (p[i] < 32) {
217 p[i] = ' ';
218 ret = false;
219 }
220 }
221 return ret;
222}
223
224static int vidioc_g_tuner(struct file *file, void *priv,
225 struct v4l2_tuner *v)
226{
227 struct pcm20 *dev = video_drvdata(file);
228 int res;
229 u8 buf;
230
231 if (v->index)
232 return -EINVAL;
233 strscpy(v->name, "FM", sizeof(v->name));
234 v->type = V4L2_TUNER_RADIO;
235 v->rangelow = 87*16000;
236 v->rangehigh = 108*16000;
237 res = snd_aci_cmd(dev->aci, ACI_READ_TUNERSTATION, -1, -1);
238 v->signal = (res & 0x80) ? 0 : 0xffff;
239
240
241 res = snd_aci_cmd(dev->aci, ACI_READ_TUNERSTEREO, -1, -1);
242 v->rxsubchans = (res & 0x40) ? V4L2_TUNER_SUB_MONO :
243 V4L2_TUNER_SUB_STEREO;
244 v->capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO |
245 V4L2_TUNER_CAP_RDS | V4L2_TUNER_CAP_RDS_CONTROLS;
246 v->audmode = dev->audmode;
247 res = rds_cmd(dev->aci, RDS_RXVALUE, &buf, 1);
248 if (res >= 0 && buf)
249 v->rxsubchans |= V4L2_TUNER_SUB_RDS;
250 return 0;
251}
252
253static int vidioc_s_tuner(struct file *file, void *priv,
254 const struct v4l2_tuner *v)
255{
256 struct pcm20 *dev = video_drvdata(file);
257
258 if (v->index)
259 return -EINVAL;
260 if (v->audmode > V4L2_TUNER_MODE_STEREO)
261 dev->audmode = V4L2_TUNER_MODE_STEREO;
262 else
263 dev->audmode = v->audmode;
264 snd_aci_cmd(dev->aci, ACI_SET_TUNERMONO,
265 dev->audmode == V4L2_TUNER_MODE_MONO, -1);
266 return 0;
267}
268
269static int vidioc_g_frequency(struct file *file, void *priv,
270 struct v4l2_frequency *f)
271{
272 struct pcm20 *dev = video_drvdata(file);
273
274 if (f->tuner != 0)
275 return -EINVAL;
276
277 f->type = V4L2_TUNER_RADIO;
278 f->frequency = dev->freq;
279 return 0;
280}
281
282
283static int vidioc_s_frequency(struct file *file, void *priv,
284 const struct v4l2_frequency *f)
285{
286 struct pcm20 *dev = video_drvdata(file);
287
288 if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO)
289 return -EINVAL;
290
291 dev->freq = clamp_t(u32, f->frequency, 87 * 16000U, 108 * 16000U);
292 pcm20_setfreq(dev, dev->freq);
293 return 0;
294}
295
296static int pcm20_s_ctrl(struct v4l2_ctrl *ctrl)
297{
298 struct pcm20 *dev = container_of(ctrl->handler, struct pcm20, ctrl_handler);
299
300 switch (ctrl->id) {
301 case V4L2_CID_AUDIO_MUTE:
302 snd_aci_cmd(dev->aci, ACI_SET_TUNERMUTE, ctrl->val, -1);
303 return 0;
304 }
305 return -EINVAL;
306}
307
308static int pcm20_thread(void *data)
309{
310 struct pcm20 *dev = data;
311 const unsigned no_rds_start_counter = 5;
312 const unsigned sleep_msecs = 2000;
313 unsigned no_rds_counter = no_rds_start_counter;
314
315 for (;;) {
316 char text_buffer[66];
317 u8 buf;
318 int res;
319
320 msleep_interruptible(sleep_msecs);
321
322 if (kthread_should_stop())
323 break;
324
325 res = rds_cmd(dev->aci, RDS_RXVALUE, &buf, 1);
326 if (res)
327 continue;
328 if (buf == 0) {
329 if (no_rds_counter == 0)
330 continue;
331 no_rds_counter--;
332 if (no_rds_counter)
333 continue;
334
335
336
337
338
339
340 v4l2_ctrl_s_ctrl_string(dev->rds_ps_name, "");
341 v4l2_ctrl_s_ctrl(dev->rds_ms, 1);
342 v4l2_ctrl_s_ctrl(dev->rds_ta, 0);
343 v4l2_ctrl_s_ctrl(dev->rds_tp, 0);
344 v4l2_ctrl_s_ctrl(dev->rds_pty, 0);
345 v4l2_ctrl_s_ctrl_string(dev->rds_radio_test, "");
346 continue;
347 }
348 no_rds_counter = no_rds_start_counter;
349
350 res = rds_cmd(dev->aci, RDS_STATUS, &buf, 1);
351 if (res)
352 continue;
353 if ((buf >> 3) & 1) {
354 res = rds_cmd(dev->aci, RDS_STATIONNAME, text_buffer, 8);
355 text_buffer[8] = 0;
356 if (!res && sanitize(text_buffer, 8))
357 v4l2_ctrl_s_ctrl_string(dev->rds_ps_name, text_buffer);
358 }
359 if ((buf >> 6) & 1) {
360 u8 pty;
361
362 res = rds_cmd(dev->aci, RDS_PTYTATP, &pty, 1);
363 if (!res) {
364 v4l2_ctrl_s_ctrl(dev->rds_ms, !!(pty & 0x01));
365 v4l2_ctrl_s_ctrl(dev->rds_ta, !!(pty & 0x02));
366 v4l2_ctrl_s_ctrl(dev->rds_tp, !!(pty & 0x80));
367 v4l2_ctrl_s_ctrl(dev->rds_pty, (pty >> 2) & 0x1f);
368 }
369 }
370 if ((buf >> 4) & 1) {
371 res = rds_cmd(dev->aci, RDS_TEXT, text_buffer, 65);
372 text_buffer[65] = 0;
373 if (!res && sanitize(text_buffer + 1, 64))
374 v4l2_ctrl_s_ctrl_string(dev->rds_radio_test, text_buffer + 1);
375 }
376 }
377 return 0;
378}
379
380static int pcm20_open(struct file *file)
381{
382 struct pcm20 *dev = video_drvdata(file);
383 int res = v4l2_fh_open(file);
384
385 if (!res && v4l2_fh_is_singular_file(file) &&
386 IS_ERR_OR_NULL(dev->kthread)) {
387 dev->kthread = kthread_run(pcm20_thread, dev, "%s",
388 dev->v4l2_dev.name);
389 if (IS_ERR(dev->kthread)) {
390 v4l2_err(&dev->v4l2_dev, "kernel_thread() failed\n");
391 v4l2_fh_release(file);
392 return PTR_ERR(dev->kthread);
393 }
394 }
395 return res;
396}
397
398static int pcm20_release(struct file *file)
399{
400 struct pcm20 *dev = video_drvdata(file);
401
402 if (v4l2_fh_is_singular_file(file) && !IS_ERR_OR_NULL(dev->kthread)) {
403 kthread_stop(dev->kthread);
404 dev->kthread = NULL;
405 }
406 return v4l2_fh_release(file);
407}
408
409static const struct v4l2_file_operations pcm20_fops = {
410 .owner = THIS_MODULE,
411 .open = pcm20_open,
412 .poll = v4l2_ctrl_poll,
413 .release = pcm20_release,
414 .unlocked_ioctl = video_ioctl2,
415};
416
417static const struct v4l2_ioctl_ops pcm20_ioctl_ops = {
418 .vidioc_querycap = vidioc_querycap,
419 .vidioc_g_tuner = vidioc_g_tuner,
420 .vidioc_s_tuner = vidioc_s_tuner,
421 .vidioc_g_frequency = vidioc_g_frequency,
422 .vidioc_s_frequency = vidioc_s_frequency,
423 .vidioc_log_status = v4l2_ctrl_log_status,
424 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
425 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
426};
427
428static const struct v4l2_ctrl_ops pcm20_ctrl_ops = {
429 .s_ctrl = pcm20_s_ctrl,
430};
431
432static int __init pcm20_init(void)
433{
434 struct pcm20 *dev = &pcm20_card;
435 struct v4l2_device *v4l2_dev = &dev->v4l2_dev;
436 struct v4l2_ctrl_handler *hdl;
437 int res;
438
439 dev->aci = snd_aci_get_aci();
440 if (dev->aci == NULL) {
441 v4l2_err(v4l2_dev,
442 "you must load the snd-miro driver first!\n");
443 return -ENODEV;
444 }
445 strscpy(v4l2_dev->name, "radio-miropcm20", sizeof(v4l2_dev->name));
446 mutex_init(&dev->lock);
447
448 res = v4l2_device_register(NULL, v4l2_dev);
449 if (res < 0) {
450 v4l2_err(v4l2_dev, "could not register v4l2_device\n");
451 return -EINVAL;
452 }
453
454 hdl = &dev->ctrl_handler;
455 v4l2_ctrl_handler_init(hdl, 7);
456 v4l2_ctrl_new_std(hdl, &pcm20_ctrl_ops,
457 V4L2_CID_AUDIO_MUTE, 0, 1, 1, 1);
458 dev->rds_pty = v4l2_ctrl_new_std(hdl, NULL,
459 V4L2_CID_RDS_RX_PTY, 0, 0x1f, 1, 0);
460 dev->rds_ps_name = v4l2_ctrl_new_std(hdl, NULL,
461 V4L2_CID_RDS_RX_PS_NAME, 0, 8, 8, 0);
462 dev->rds_radio_test = v4l2_ctrl_new_std(hdl, NULL,
463 V4L2_CID_RDS_RX_RADIO_TEXT, 0, 64, 64, 0);
464 dev->rds_ta = v4l2_ctrl_new_std(hdl, NULL,
465 V4L2_CID_RDS_RX_TRAFFIC_ANNOUNCEMENT, 0, 1, 1, 0);
466 dev->rds_tp = v4l2_ctrl_new_std(hdl, NULL,
467 V4L2_CID_RDS_RX_TRAFFIC_PROGRAM, 0, 1, 1, 0);
468 dev->rds_ms = v4l2_ctrl_new_std(hdl, NULL,
469 V4L2_CID_RDS_RX_MUSIC_SPEECH, 0, 1, 1, 1);
470 v4l2_dev->ctrl_handler = hdl;
471 if (hdl->error) {
472 res = hdl->error;
473 v4l2_err(v4l2_dev, "Could not register control\n");
474 goto err_hdl;
475 }
476 strscpy(dev->vdev.name, v4l2_dev->name, sizeof(dev->vdev.name));
477 dev->vdev.v4l2_dev = v4l2_dev;
478 dev->vdev.fops = &pcm20_fops;
479 dev->vdev.ioctl_ops = &pcm20_ioctl_ops;
480 dev->vdev.release = video_device_release_empty;
481 dev->vdev.lock = &dev->lock;
482 dev->vdev.device_caps = V4L2_CAP_TUNER | V4L2_CAP_RADIO |
483 V4L2_CAP_RDS_CAPTURE;
484 video_set_drvdata(&dev->vdev, dev);
485 snd_aci_cmd(dev->aci, ACI_SET_TUNERMONO,
486 dev->audmode == V4L2_TUNER_MODE_MONO, -1);
487 pcm20_setfreq(dev, dev->freq);
488
489 if (video_register_device(&dev->vdev, VFL_TYPE_RADIO, radio_nr) < 0)
490 goto err_hdl;
491
492 v4l2_info(v4l2_dev, "Mirosound PCM20 Radio tuner\n");
493 return 0;
494err_hdl:
495 v4l2_ctrl_handler_free(hdl);
496 v4l2_device_unregister(v4l2_dev);
497 return -EINVAL;
498}
499
500MODULE_AUTHOR("Ruurd Reitsma, Krzysztof Helt");
501MODULE_DESCRIPTION("A driver for the Miro PCM20 radio card.");
502MODULE_LICENSE("GPL");
503
504static void __exit pcm20_cleanup(void)
505{
506 struct pcm20 *dev = &pcm20_card;
507
508 video_unregister_device(&dev->vdev);
509 snd_aci_cmd(dev->aci, ACI_SET_TUNERMUTE, 1, -1);
510 v4l2_ctrl_handler_free(&dev->ctrl_handler);
511 v4l2_device_unregister(&dev->v4l2_dev);
512}
513
514module_init(pcm20_init);
515module_exit(pcm20_cleanup);
516
