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 <asm/io.h> /* outb, outb_p */
32 #include <asm/uaccess.h> /* copy to/from user */
33 #include <linux/videodev2.h> /* kernel radio structs */
34 #include <media/v4l2-common.h>
35 #include <media/v4l2-ioctl.h>
36 #include <linux/spinlock.h>
38 #include <linux/version.h> /* for KERNEL_VERSION MACRO */
39 #define RADIO_VERSION KERNEL_VERSION(0,0,2)
41 static struct v4l2_queryctrl radio_qctrl[] = {
43 .id = V4L2_CID_AUDIO_MUTE,
48 .type = V4L2_CTRL_TYPE_BOOLEAN,
50 .id = V4L2_CID_AUDIO_VOLUME,
55 .default_value = 0xff,
56 .type = V4L2_CTRL_TYPE_INTEGER,
60 #ifndef CONFIG_RADIO_TERRATEC_PORT
61 #define CONFIG_RADIO_TERRATEC_PORT 0x590
64 /**************** this ones are for the terratec *******************/
65 #define BASEPORT 0x590
74 /*******************************************************************/
76 static int io = CONFIG_RADIO_TERRATEC_PORT;
77 static int radio_nr = -1;
78 static spinlock_t lock;
85 unsigned long curfreq;
92 static void cardWriteVol(int volume)
95 volume = volume+(volume * 32); // change both channels
99 if (volume & (0x80>>i))
101 else outb(0x00, VOLPORT);
108 static void tt_mute(struct tt_device *dev)
114 static int tt_setvol(struct tt_device *dev, int vol)
117 // printk(KERN_ERR "setvol called, vol = %d\n", vol);
119 if(vol == dev->curvol) { /* requested volume = current */
120 if (dev->muted) { /* user is unmuting the card */
122 cardWriteVol(vol); /* enable card */
128 if(vol == 0) { /* volume = 0 means mute the card */
129 cardWriteVol(0); /* "turn off card" by setting vol to 0 */
130 dev->curvol = vol; /* track the volume state! */
145 /* this is the worst part in this driver */
146 /* many more or less strange things are going on here, but hey, it works :) */
148 static int tt_setfreq(struct tt_device *dev, unsigned long freq1)
156 unsigned char buffer[25]; /* we have to bit shift 25 registers */
157 freq = freq1/160; /* convert the freq. to a nice to handle value */
161 rest = freq*10+10700; /* i once had understood what is going on here */
162 /* maybe some wise guy (friedhelm?) can comment this stuff */
168 if (rest%temp == rest)
182 for (i=24;i>-1;i--) /* bit shift the values to the radiocard */
186 outb(WRT_EN|DATA, BASEPORT);
187 outb(WRT_EN|DATA|CLK_ON , BASEPORT);
188 outb(WRT_EN|DATA, BASEPORT);
192 outb(WRT_EN|0x00, BASEPORT);
193 outb(WRT_EN|0x00|CLK_ON , BASEPORT);
196 outb(0x00, BASEPORT);
203 static int tt_getsigstr(struct tt_device *dev) /* TODO */
205 if (inb(io) & 2) /* bit set = no signal present */
207 return 1; /* signal present */
210 static int vidioc_querycap(struct file *file, void *priv,
211 struct v4l2_capability *v)
213 strlcpy(v->driver, "radio-terratec", sizeof(v->driver));
214 strlcpy(v->card, "ActiveRadio", sizeof(v->card));
215 sprintf(v->bus_info, "ISA");
216 v->version = RADIO_VERSION;
217 v->capabilities = V4L2_CAP_TUNER;
221 static int vidioc_g_tuner(struct file *file, void *priv,
222 struct v4l2_tuner *v)
224 struct video_device *dev = video_devdata(file);
225 struct tt_device *tt = dev->priv;
230 strcpy(v->name, "FM");
231 v->type = V4L2_TUNER_RADIO;
232 v->rangelow = (87*16000);
233 v->rangehigh = (108*16000);
234 v->rxsubchans = V4L2_TUNER_SUB_MONO;
235 v->capability = V4L2_TUNER_CAP_LOW;
236 v->audmode = V4L2_TUNER_MODE_MONO;
237 v->signal = 0xFFFF*tt_getsigstr(tt);
241 static int vidioc_s_tuner(struct file *file, void *priv,
242 struct v4l2_tuner *v)
249 static int vidioc_s_frequency(struct file *file, void *priv,
250 struct v4l2_frequency *f)
252 struct video_device *dev = video_devdata(file);
253 struct tt_device *tt = dev->priv;
255 tt->curfreq = f->frequency;
256 tt_setfreq(tt, tt->curfreq);
260 static int vidioc_g_frequency(struct file *file, void *priv,
261 struct v4l2_frequency *f)
263 struct video_device *dev = video_devdata(file);
264 struct tt_device *tt = dev->priv;
266 f->type = V4L2_TUNER_RADIO;
267 f->frequency = tt->curfreq;
271 static int vidioc_queryctrl(struct file *file, void *priv,
272 struct v4l2_queryctrl *qc)
276 for (i = 0; i < ARRAY_SIZE(radio_qctrl); i++) {
277 if (qc->id && qc->id == radio_qctrl[i].id) {
278 memcpy(qc, &(radio_qctrl[i]),
286 static int vidioc_g_ctrl(struct file *file, void *priv,
287 struct v4l2_control *ctrl)
289 struct video_device *dev = video_devdata(file);
290 struct tt_device *tt = dev->priv;
293 case V4L2_CID_AUDIO_MUTE:
299 case V4L2_CID_AUDIO_VOLUME:
300 ctrl->value = tt->curvol * 6554;
306 static int vidioc_s_ctrl(struct file *file, void *priv,
307 struct v4l2_control *ctrl)
309 struct video_device *dev = video_devdata(file);
310 struct tt_device *tt = dev->priv;
313 case V4L2_CID_AUDIO_MUTE:
317 tt_setvol(tt,tt->curvol);
319 case V4L2_CID_AUDIO_VOLUME:
320 tt_setvol(tt,ctrl->value);
326 static int vidioc_g_audio(struct file *file, void *priv,
327 struct v4l2_audio *a)
332 strcpy(a->name, "Radio");
333 a->capability = V4L2_AUDCAP_STEREO;
337 static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
343 static int vidioc_s_input(struct file *filp, void *priv, unsigned int i)
350 static int vidioc_s_audio(struct file *file, void *priv,
351 struct v4l2_audio *a)
358 static struct tt_device terratec_unit;
360 static int terratec_exclusive_open(struct inode *inode, struct file *file)
362 return test_and_set_bit(0, &terratec_unit.in_use) ? -EBUSY : 0;
365 static int terratec_exclusive_release(struct inode *inode, struct file *file)
367 clear_bit(0, &terratec_unit.in_use);
371 static const struct file_operations terratec_fops = {
372 .owner = THIS_MODULE,
373 .open = terratec_exclusive_open,
374 .release = terratec_exclusive_release,
375 .ioctl = video_ioctl2,
377 .compat_ioctl = v4l_compat_ioctl32,
382 static const struct v4l2_ioctl_ops terratec_ioctl_ops = {
383 .vidioc_querycap = vidioc_querycap,
384 .vidioc_g_tuner = vidioc_g_tuner,
385 .vidioc_s_tuner = vidioc_s_tuner,
386 .vidioc_g_frequency = vidioc_g_frequency,
387 .vidioc_s_frequency = vidioc_s_frequency,
388 .vidioc_queryctrl = vidioc_queryctrl,
389 .vidioc_g_ctrl = vidioc_g_ctrl,
390 .vidioc_s_ctrl = vidioc_s_ctrl,
391 .vidioc_g_audio = vidioc_g_audio,
392 .vidioc_s_audio = vidioc_s_audio,
393 .vidioc_g_input = vidioc_g_input,
394 .vidioc_s_input = vidioc_s_input,
397 static struct video_device terratec_radio = {
398 .name = "TerraTec ActiveRadio",
399 .fops = &terratec_fops,
400 .ioctl_ops = &terratec_ioctl_ops,
403 static int __init terratec_init(void)
407 printk(KERN_ERR "You must set an I/O address with io=0x???\n");
410 if (!request_region(io, 2, "terratec"))
412 printk(KERN_ERR "TerraTec: port 0x%x already in use\n", io);
416 terratec_radio.priv=&terratec_unit;
418 spin_lock_init(&lock);
420 if (video_register_device(&terratec_radio, VFL_TYPE_RADIO, radio_nr) < 0) {
421 release_region(io,2);
425 printk(KERN_INFO "TERRATEC ActivRadio Standalone card driver.\n");
427 /* mute card - prevents noisy bootups */
429 /* this ensures that the volume is all the way down */
431 terratec_unit.curvol = 0;
436 MODULE_AUTHOR("R.OFFERMANNS & others");
437 MODULE_DESCRIPTION("A driver for the TerraTec ActiveRadio Standalone radio card.");
438 MODULE_LICENSE("GPL");
439 module_param(io, int, 0);
440 MODULE_PARM_DESC(io, "I/O address of the TerraTec ActiveRadio card (0x590 or 0x591)");
441 module_param(radio_nr, int, 0);
443 static void __exit terratec_cleanup_module(void)
445 video_unregister_device(&terratec_radio);
446 release_region(io,2);
447 printk(KERN_INFO "TERRATEC ActivRadio Standalone card driver unloaded.\n");
450 module_init(terratec_init);
451 module_exit(terratec_cleanup_module);