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/delay.h> /* udelay */
31 #include <linux/videodev2.h> /* kernel radio structs */
32 #include <linux/mutex.h>
33 #include <linux/version.h> /* for KERNEL_VERSION MACRO */
34 #include <linux/io.h> /* outb, outb_p */
35 #include <linux/uaccess.h> /* copy to/from user */
36 #include <media/v4l2-device.h>
37 #include <media/v4l2-ioctl.h>
39 MODULE_AUTHOR("R.OFFERMANNS & others");
40 MODULE_DESCRIPTION("A driver for the TerraTec ActiveRadio Standalone radio card.");
41 MODULE_LICENSE("GPL");
43 #ifndef CONFIG_RADIO_TERRATEC_PORT
44 #define CONFIG_RADIO_TERRATEC_PORT 0x590
47 static int io = CONFIG_RADIO_TERRATEC_PORT;
48 static int radio_nr = -1;
50 module_param(io, int, 0);
51 MODULE_PARM_DESC(io, "I/O address of the TerraTec ActiveRadio card (0x590 or 0x591)");
52 module_param(radio_nr, int, 0);
54 #define RADIO_VERSION KERNEL_VERSION(0, 0, 2)
56 static struct v4l2_queryctrl radio_qctrl[] = {
58 .id = V4L2_CID_AUDIO_MUTE,
63 .type = V4L2_CTRL_TYPE_BOOLEAN,
65 .id = V4L2_CID_AUDIO_VOLUME,
70 .default_value = 0xff,
71 .type = V4L2_CTRL_TYPE_INTEGER,
85 struct v4l2_device v4l2_dev;
86 struct video_device vdev;
89 unsigned long curfreq;
94 static struct terratec terratec_card;
98 static void tt_write_vol(struct terratec *tt, int volume)
102 volume = volume + (volume * 32); /* change both channels */
103 mutex_lock(&tt->lock);
104 for (i = 0; i < 8; i++) {
105 if (volume & (0x80 >> i))
106 outb(0x80, tt->io + 1);
108 outb(0x00, tt->io + 1);
110 mutex_unlock(&tt->lock);
115 static void tt_mute(struct terratec *tt)
121 static int tt_setvol(struct terratec *tt, int vol)
123 if (vol == tt->curvol) { /* requested volume = current */
124 if (tt->muted) { /* user is unmuting the card */
126 tt_write_vol(tt, vol); /* enable card */
131 if (vol == 0) { /* volume = 0 means mute the card */
132 tt_write_vol(tt, 0); /* "turn off card" by setting vol to 0 */
133 tt->curvol = vol; /* track the volume state! */
138 tt_write_vol(tt, vol);
144 /* this is the worst part in this driver */
145 /* many more or less strange things are going on here, but hey, it works :) */
147 static int tt_setfreq(struct terratec *tt, unsigned long freq1)
154 unsigned char buffer[25]; /* we have to bit shift 25 registers */
156 mutex_lock(&tt->lock);
160 freq = freq1 / 160; /* convert the freq. to a nice to handle value */
161 memset(buffer, 0, sizeof(buffer));
163 rest = freq * 10 + 10700; /* I once had understood what is going on here */
164 /* maybe some wise guy (friedhelm?) can comment this stuff */
169 if (rest % temp == rest)
180 for (i = 24; i > -1; i--) { /* bit shift the values to the radiocard */
181 if (buffer[i] == 1) {
182 outb(WRT_EN | DATA, tt->io);
183 outb(WRT_EN | DATA | CLK_ON, tt->io);
184 outb(WRT_EN | DATA, tt->io);
186 outb(WRT_EN | 0x00, tt->io);
187 outb(WRT_EN | 0x00 | CLK_ON, tt->io);
192 mutex_unlock(&tt->lock);
197 static int tt_getsigstr(struct terratec *tt)
199 if (inb(tt->io) & 2) /* bit set = no signal present */
201 return 1; /* signal present */
204 static int vidioc_querycap(struct file *file, void *priv,
205 struct v4l2_capability *v)
207 strlcpy(v->driver, "radio-terratec", sizeof(v->driver));
208 strlcpy(v->card, "ActiveRadio", sizeof(v->card));
209 strlcpy(v->bus_info, "ISA", sizeof(v->bus_info));
210 v->version = RADIO_VERSION;
211 v->capabilities = V4L2_CAP_TUNER | V4L2_CAP_RADIO;
215 static int vidioc_g_tuner(struct file *file, void *priv,
216 struct v4l2_tuner *v)
218 struct terratec *tt = video_drvdata(file);
223 strlcpy(v->name, "FM", sizeof(v->name));
224 v->type = V4L2_TUNER_RADIO;
225 v->rangelow = 87 * 16000;
226 v->rangehigh = 108 * 16000;
227 v->rxsubchans = V4L2_TUNER_SUB_MONO;
228 v->capability = V4L2_TUNER_CAP_LOW;
229 v->audmode = V4L2_TUNER_MODE_MONO;
230 v->signal = 0xFFFF * tt_getsigstr(tt);
234 static int vidioc_s_tuner(struct file *file, void *priv,
235 struct v4l2_tuner *v)
237 return v->index ? -EINVAL : 0;
240 static int vidioc_s_frequency(struct file *file, void *priv,
241 struct v4l2_frequency *f)
243 struct terratec *tt = video_drvdata(file);
245 tt_setfreq(tt, f->frequency);
249 static int vidioc_g_frequency(struct file *file, void *priv,
250 struct v4l2_frequency *f)
252 struct terratec *tt = video_drvdata(file);
254 f->type = V4L2_TUNER_RADIO;
255 f->frequency = tt->curfreq;
259 static int vidioc_queryctrl(struct file *file, void *priv,
260 struct v4l2_queryctrl *qc)
264 for (i = 0; i < ARRAY_SIZE(radio_qctrl); i++) {
265 if (qc->id && qc->id == radio_qctrl[i].id) {
266 memcpy(qc, &(radio_qctrl[i]), sizeof(*qc));
273 static int vidioc_g_ctrl(struct file *file, void *priv,
274 struct v4l2_control *ctrl)
276 struct terratec *tt = video_drvdata(file);
279 case V4L2_CID_AUDIO_MUTE:
285 case V4L2_CID_AUDIO_VOLUME:
286 ctrl->value = tt->curvol * 6554;
292 static int vidioc_s_ctrl(struct file *file, void *priv,
293 struct v4l2_control *ctrl)
295 struct terratec *tt = video_drvdata(file);
298 case V4L2_CID_AUDIO_MUTE:
302 tt_setvol(tt,tt->curvol);
304 case V4L2_CID_AUDIO_VOLUME:
305 tt_setvol(tt,ctrl->value);
311 static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
317 static int vidioc_s_input(struct file *filp, void *priv, unsigned int i)
319 return i ? -EINVAL : 0;
322 static int vidioc_g_audio(struct file *file, void *priv,
323 struct v4l2_audio *a)
326 strlcpy(a->name, "Radio", sizeof(a->name));
327 a->capability = V4L2_AUDCAP_STEREO;
331 static int vidioc_s_audio(struct file *file, void *priv,
332 struct v4l2_audio *a)
334 return a->index ? -EINVAL : 0;
337 static int terratec_open(struct file *file)
342 static int terratec_release(struct file *file)
347 static const struct v4l2_file_operations terratec_fops = {
348 .owner = THIS_MODULE,
349 .open = terratec_open,
350 .release = terratec_release,
351 .ioctl = video_ioctl2,
354 static const struct v4l2_ioctl_ops terratec_ioctl_ops = {
355 .vidioc_querycap = vidioc_querycap,
356 .vidioc_g_tuner = vidioc_g_tuner,
357 .vidioc_s_tuner = vidioc_s_tuner,
358 .vidioc_g_frequency = vidioc_g_frequency,
359 .vidioc_s_frequency = vidioc_s_frequency,
360 .vidioc_queryctrl = vidioc_queryctrl,
361 .vidioc_g_ctrl = vidioc_g_ctrl,
362 .vidioc_s_ctrl = vidioc_s_ctrl,
363 .vidioc_g_audio = vidioc_g_audio,
364 .vidioc_s_audio = vidioc_s_audio,
365 .vidioc_g_input = vidioc_g_input,
366 .vidioc_s_input = vidioc_s_input,
369 static int __init terratec_init(void)
371 struct terratec *tt = &terratec_card;
372 struct v4l2_device *v4l2_dev = &tt->v4l2_dev;
375 strlcpy(v4l2_dev->name, "terratec", sizeof(v4l2_dev->name));
378 v4l2_err(v4l2_dev, "you must set an I/O address with io=0x???\n");
381 if (!request_region(tt->io, 2, "terratec")) {
382 v4l2_err(v4l2_dev, "port 0x%x already in use\n", io);
386 res = v4l2_device_register(NULL, v4l2_dev);
388 release_region(tt->io, 2);
389 v4l2_err(v4l2_dev, "Could not register v4l2_device\n");
393 strlcpy(tt->vdev.name, v4l2_dev->name, sizeof(tt->vdev.name));
394 tt->vdev.v4l2_dev = v4l2_dev;
395 tt->vdev.fops = &terratec_fops;
396 tt->vdev.ioctl_ops = &terratec_ioctl_ops;
397 tt->vdev.release = video_device_release_empty;
398 video_set_drvdata(&tt->vdev, tt);
400 mutex_init(&tt->lock);
402 if (video_register_device(&tt->vdev, VFL_TYPE_RADIO, radio_nr) < 0) {
403 v4l2_device_unregister(&tt->v4l2_dev);
404 release_region(tt->io, 2);
408 v4l2_info(v4l2_dev, "TERRATEC ActivRadio Standalone card driver.\n");
410 /* mute card - prevents noisy bootups */
415 static void __exit terratec_exit(void)
417 struct terratec *tt = &terratec_card;
418 struct v4l2_device *v4l2_dev = &tt->v4l2_dev;
420 video_unregister_device(&tt->vdev);
421 v4l2_device_unregister(&tt->v4l2_dev);
422 release_region(tt->io, 2);
423 v4l2_info(v4l2_dev, "TERRATEC ActivRadio Standalone card driver unloaded.\n");
426 module_init(terratec_init);
427 module_exit(terratec_exit);