1 /* Terratec ActiveRadio ISA Standalone card driver for Linux radio support
2 * (c) 1999 R. Offermanns (rolf@offermanns.de)
3 * based on the aimslab radio driver from M. Kirkwood
4 * many thanks to Michael Becker and Friedhelm Birth (from TerraTec)
8 * 1999-05-21 First preview release
10 * Notes on the hardware:
11 * There are two "main" chips on the card:
12 * - Philips OM5610 (http://www-us.semiconductors.philips.com/acrobat/datasheets/OM5610_2.pdf)
13 * - Philips SAA6588 (http://www-us.semiconductors.philips.com/acrobat/datasheets/SAA6588_1.pdf)
14 * (you can get the datasheet at the above links)
16 * Frequency control is done digitally -- ie out(port,encodefreq(95.8));
17 * Volume Control is done digitally
19 * there is a I2C controlled RDS decoder (SAA6588) onboard, which i would like to support someday
20 * (as soon i have understand how to get started :)
21 * If you can help me out with that, please contact me!!
24 * Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@infradead.org>
27 #include <linux/module.h> /* Modules */
28 #include <linux/init.h> /* Initdata */
29 #include <linux/ioport.h> /* request_region */
30 #include <linux/videodev2.h> /* kernel radio structs */
31 #include <linux/mutex.h>
32 #include <linux/version.h> /* for KERNEL_VERSION MACRO */
33 #include <linux/io.h> /* outb, outb_p */
34 #include <media/v4l2-device.h>
35 #include <media/v4l2-ioctl.h>
37 MODULE_AUTHOR("R.OFFERMANNS & others");
38 MODULE_DESCRIPTION("A driver for the TerraTec ActiveRadio Standalone radio card.");
39 MODULE_LICENSE("GPL");
41 #ifndef CONFIG_RADIO_TERRATEC_PORT
42 #define CONFIG_RADIO_TERRATEC_PORT 0x590
45 static int io = CONFIG_RADIO_TERRATEC_PORT;
46 static int radio_nr = -1;
48 module_param(io, int, 0);
49 MODULE_PARM_DESC(io, "I/O address of the TerraTec ActiveRadio card (0x590 or 0x591)");
50 module_param(radio_nr, int, 0);
52 #define RADIO_VERSION KERNEL_VERSION(0, 0, 2)
54 static struct v4l2_queryctrl radio_qctrl[] = {
56 .id = V4L2_CID_AUDIO_MUTE,
61 .type = V4L2_CTRL_TYPE_BOOLEAN,
63 .id = V4L2_CID_AUDIO_VOLUME,
68 .default_value = 0xff,
69 .type = V4L2_CTRL_TYPE_INTEGER,
83 struct v4l2_device v4l2_dev;
84 struct video_device vdev;
87 unsigned long curfreq;
92 static struct terratec terratec_card;
96 static void tt_write_vol(struct terratec *tt, int volume)
100 volume = volume + (volume * 32); /* change both channels */
101 mutex_lock(&tt->lock);
102 for (i = 0; i < 8; i++) {
103 if (volume & (0x80 >> i))
104 outb(0x80, tt->io + 1);
106 outb(0x00, tt->io + 1);
108 mutex_unlock(&tt->lock);
113 static void tt_mute(struct terratec *tt)
119 static int tt_setvol(struct terratec *tt, int vol)
121 if (vol == tt->curvol) { /* requested volume = current */
122 if (tt->muted) { /* user is unmuting the card */
124 tt_write_vol(tt, vol); /* enable card */
129 if (vol == 0) { /* volume = 0 means mute the card */
130 tt_write_vol(tt, 0); /* "turn off card" by setting vol to 0 */
131 tt->curvol = vol; /* track the volume state! */
136 tt_write_vol(tt, vol);
142 /* this is the worst part in this driver */
143 /* many more or less strange things are going on here, but hey, it works :) */
145 static int tt_setfreq(struct terratec *tt, unsigned long freq1)
152 unsigned char buffer[25]; /* we have to bit shift 25 registers */
154 mutex_lock(&tt->lock);
158 freq = freq1 / 160; /* convert the freq. to a nice to handle value */
159 memset(buffer, 0, sizeof(buffer));
161 rest = freq * 10 + 10700; /* I once had understood what is going on here */
162 /* maybe some wise guy (friedhelm?) can comment this stuff */
167 if (rest % temp == rest)
178 for (i = 24; i > -1; i--) { /* bit shift the values to the radiocard */
179 if (buffer[i] == 1) {
180 outb(WRT_EN | DATA, tt->io);
181 outb(WRT_EN | DATA | CLK_ON, tt->io);
182 outb(WRT_EN | DATA, tt->io);
184 outb(WRT_EN | 0x00, tt->io);
185 outb(WRT_EN | 0x00 | CLK_ON, tt->io);
190 mutex_unlock(&tt->lock);
195 static int tt_getsigstr(struct terratec *tt)
197 if (inb(tt->io) & 2) /* bit set = no signal present */
199 return 1; /* signal present */
202 static int vidioc_querycap(struct file *file, void *priv,
203 struct v4l2_capability *v)
205 strlcpy(v->driver, "radio-terratec", sizeof(v->driver));
206 strlcpy(v->card, "ActiveRadio", sizeof(v->card));
207 strlcpy(v->bus_info, "ISA", sizeof(v->bus_info));
208 v->version = RADIO_VERSION;
209 v->capabilities = V4L2_CAP_TUNER | V4L2_CAP_RADIO;
213 static int vidioc_g_tuner(struct file *file, void *priv,
214 struct v4l2_tuner *v)
216 struct terratec *tt = video_drvdata(file);
221 strlcpy(v->name, "FM", sizeof(v->name));
222 v->type = V4L2_TUNER_RADIO;
223 v->rangelow = 87 * 16000;
224 v->rangehigh = 108 * 16000;
225 v->rxsubchans = V4L2_TUNER_SUB_MONO;
226 v->capability = V4L2_TUNER_CAP_LOW;
227 v->audmode = V4L2_TUNER_MODE_MONO;
228 v->signal = 0xFFFF * tt_getsigstr(tt);
232 static int vidioc_s_tuner(struct file *file, void *priv,
233 struct v4l2_tuner *v)
235 return v->index ? -EINVAL : 0;
238 static int vidioc_s_frequency(struct file *file, void *priv,
239 struct v4l2_frequency *f)
241 struct terratec *tt = video_drvdata(file);
243 tt_setfreq(tt, f->frequency);
247 static int vidioc_g_frequency(struct file *file, void *priv,
248 struct v4l2_frequency *f)
250 struct terratec *tt = video_drvdata(file);
252 f->type = V4L2_TUNER_RADIO;
253 f->frequency = tt->curfreq;
257 static int vidioc_queryctrl(struct file *file, void *priv,
258 struct v4l2_queryctrl *qc)
262 for (i = 0; i < ARRAY_SIZE(radio_qctrl); i++) {
263 if (qc->id && qc->id == radio_qctrl[i].id) {
264 memcpy(qc, &(radio_qctrl[i]), sizeof(*qc));
271 static int vidioc_g_ctrl(struct file *file, void *priv,
272 struct v4l2_control *ctrl)
274 struct terratec *tt = video_drvdata(file);
277 case V4L2_CID_AUDIO_MUTE:
283 case V4L2_CID_AUDIO_VOLUME:
284 ctrl->value = tt->curvol * 6554;
290 static int vidioc_s_ctrl(struct file *file, void *priv,
291 struct v4l2_control *ctrl)
293 struct terratec *tt = video_drvdata(file);
296 case V4L2_CID_AUDIO_MUTE:
300 tt_setvol(tt,tt->curvol);
302 case V4L2_CID_AUDIO_VOLUME:
303 tt_setvol(tt,ctrl->value);
309 static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
315 static int vidioc_s_input(struct file *filp, void *priv, unsigned int i)
317 return i ? -EINVAL : 0;
320 static int vidioc_g_audio(struct file *file, void *priv,
321 struct v4l2_audio *a)
324 strlcpy(a->name, "Radio", sizeof(a->name));
325 a->capability = V4L2_AUDCAP_STEREO;
329 static int vidioc_s_audio(struct file *file, void *priv,
330 struct v4l2_audio *a)
332 return a->index ? -EINVAL : 0;
335 static int terratec_open(struct file *file)
340 static int terratec_release(struct file *file)
345 static const struct v4l2_file_operations terratec_fops = {
346 .owner = THIS_MODULE,
347 .open = terratec_open,
348 .release = terratec_release,
349 .ioctl = video_ioctl2,
352 static const struct v4l2_ioctl_ops terratec_ioctl_ops = {
353 .vidioc_querycap = vidioc_querycap,
354 .vidioc_g_tuner = vidioc_g_tuner,
355 .vidioc_s_tuner = vidioc_s_tuner,
356 .vidioc_g_frequency = vidioc_g_frequency,
357 .vidioc_s_frequency = vidioc_s_frequency,
358 .vidioc_queryctrl = vidioc_queryctrl,
359 .vidioc_g_ctrl = vidioc_g_ctrl,
360 .vidioc_s_ctrl = vidioc_s_ctrl,
361 .vidioc_g_audio = vidioc_g_audio,
362 .vidioc_s_audio = vidioc_s_audio,
363 .vidioc_g_input = vidioc_g_input,
364 .vidioc_s_input = vidioc_s_input,
367 static int __init terratec_init(void)
369 struct terratec *tt = &terratec_card;
370 struct v4l2_device *v4l2_dev = &tt->v4l2_dev;
373 strlcpy(v4l2_dev->name, "terratec", sizeof(v4l2_dev->name));
376 v4l2_err(v4l2_dev, "you must set an I/O address with io=0x590 or 0x591\n");
379 if (!request_region(tt->io, 2, "terratec")) {
380 v4l2_err(v4l2_dev, "port 0x%x already in use\n", io);
384 res = v4l2_device_register(NULL, v4l2_dev);
386 release_region(tt->io, 2);
387 v4l2_err(v4l2_dev, "Could not register v4l2_device\n");
391 strlcpy(tt->vdev.name, v4l2_dev->name, sizeof(tt->vdev.name));
392 tt->vdev.v4l2_dev = v4l2_dev;
393 tt->vdev.fops = &terratec_fops;
394 tt->vdev.ioctl_ops = &terratec_ioctl_ops;
395 tt->vdev.release = video_device_release_empty;
396 video_set_drvdata(&tt->vdev, tt);
398 mutex_init(&tt->lock);
400 if (video_register_device(&tt->vdev, VFL_TYPE_RADIO, radio_nr) < 0) {
401 v4l2_device_unregister(&tt->v4l2_dev);
402 release_region(tt->io, 2);
406 v4l2_info(v4l2_dev, "TERRATEC ActivRadio Standalone card driver.\n");
408 /* mute card - prevents noisy bootups */
413 static void __exit terratec_exit(void)
415 struct terratec *tt = &terratec_card;
416 struct v4l2_device *v4l2_dev = &tt->v4l2_dev;
418 video_unregister_device(&tt->vdev);
419 v4l2_device_unregister(&tt->v4l2_dev);
420 release_region(tt->io, 2);
421 v4l2_info(v4l2_dev, "TERRATEC ActivRadio Standalone card driver unloaded.\n");
424 module_init(terratec_init);
425 module_exit(terratec_exit);