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 tt_device *tt = video_drvdata(file);
229 strcpy(v->name, "FM");
230 v->type = V4L2_TUNER_RADIO;
231 v->rangelow = (87*16000);
232 v->rangehigh = (108*16000);
233 v->rxsubchans = V4L2_TUNER_SUB_MONO;
234 v->capability = V4L2_TUNER_CAP_LOW;
235 v->audmode = V4L2_TUNER_MODE_MONO;
236 v->signal = 0xFFFF*tt_getsigstr(tt);
240 static int vidioc_s_tuner(struct file *file, void *priv,
241 struct v4l2_tuner *v)
248 static int vidioc_s_frequency(struct file *file, void *priv,
249 struct v4l2_frequency *f)
251 struct tt_device *tt = video_drvdata(file);
253 tt->curfreq = f->frequency;
254 tt_setfreq(tt, tt->curfreq);
258 static int vidioc_g_frequency(struct file *file, void *priv,
259 struct v4l2_frequency *f)
261 struct tt_device *tt = video_drvdata(file);
263 f->type = V4L2_TUNER_RADIO;
264 f->frequency = tt->curfreq;
268 static int vidioc_queryctrl(struct file *file, void *priv,
269 struct v4l2_queryctrl *qc)
273 for (i = 0; i < ARRAY_SIZE(radio_qctrl); i++) {
274 if (qc->id && qc->id == radio_qctrl[i].id) {
275 memcpy(qc, &(radio_qctrl[i]),
283 static int vidioc_g_ctrl(struct file *file, void *priv,
284 struct v4l2_control *ctrl)
286 struct tt_device *tt = video_drvdata(file);
289 case V4L2_CID_AUDIO_MUTE:
295 case V4L2_CID_AUDIO_VOLUME:
296 ctrl->value = tt->curvol * 6554;
302 static int vidioc_s_ctrl(struct file *file, void *priv,
303 struct v4l2_control *ctrl)
305 struct tt_device *tt = video_drvdata(file);
308 case V4L2_CID_AUDIO_MUTE:
312 tt_setvol(tt,tt->curvol);
314 case V4L2_CID_AUDIO_VOLUME:
315 tt_setvol(tt,ctrl->value);
321 static int vidioc_g_audio(struct file *file, void *priv,
322 struct v4l2_audio *a)
327 strcpy(a->name, "Radio");
328 a->capability = V4L2_AUDCAP_STEREO;
332 static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
338 static int vidioc_s_input(struct file *filp, void *priv, unsigned int i)
345 static int vidioc_s_audio(struct file *file, void *priv,
346 struct v4l2_audio *a)
353 static struct tt_device terratec_unit;
355 static int terratec_exclusive_open(struct inode *inode, struct file *file)
357 return test_and_set_bit(0, &terratec_unit.in_use) ? -EBUSY : 0;
360 static int terratec_exclusive_release(struct inode *inode, struct file *file)
362 clear_bit(0, &terratec_unit.in_use);
366 static const struct file_operations terratec_fops = {
367 .owner = THIS_MODULE,
368 .open = terratec_exclusive_open,
369 .release = terratec_exclusive_release,
370 .ioctl = video_ioctl2,
372 .compat_ioctl = v4l_compat_ioctl32,
377 static const struct v4l2_ioctl_ops terratec_ioctl_ops = {
378 .vidioc_querycap = vidioc_querycap,
379 .vidioc_g_tuner = vidioc_g_tuner,
380 .vidioc_s_tuner = vidioc_s_tuner,
381 .vidioc_g_frequency = vidioc_g_frequency,
382 .vidioc_s_frequency = vidioc_s_frequency,
383 .vidioc_queryctrl = vidioc_queryctrl,
384 .vidioc_g_ctrl = vidioc_g_ctrl,
385 .vidioc_s_ctrl = vidioc_s_ctrl,
386 .vidioc_g_audio = vidioc_g_audio,
387 .vidioc_s_audio = vidioc_s_audio,
388 .vidioc_g_input = vidioc_g_input,
389 .vidioc_s_input = vidioc_s_input,
392 static struct video_device terratec_radio = {
393 .name = "TerraTec ActiveRadio",
394 .fops = &terratec_fops,
395 .ioctl_ops = &terratec_ioctl_ops,
396 .release = video_device_release_empty,
399 static int __init terratec_init(void)
403 printk(KERN_ERR "You must set an I/O address with io=0x???\n");
406 if (!request_region(io, 2, "terratec"))
408 printk(KERN_ERR "TerraTec: port 0x%x already in use\n", io);
412 video_set_drvdata(&terratec_radio, &terratec_unit);
414 spin_lock_init(&lock);
416 if (video_register_device(&terratec_radio, VFL_TYPE_RADIO, radio_nr) < 0) {
417 release_region(io,2);
421 printk(KERN_INFO "TERRATEC ActivRadio Standalone card driver.\n");
423 /* mute card - prevents noisy bootups */
425 /* this ensures that the volume is all the way down */
427 terratec_unit.curvol = 0;
432 MODULE_AUTHOR("R.OFFERMANNS & others");
433 MODULE_DESCRIPTION("A driver for the TerraTec ActiveRadio Standalone radio card.");
434 MODULE_LICENSE("GPL");
435 module_param(io, int, 0);
436 MODULE_PARM_DESC(io, "I/O address of the TerraTec ActiveRadio card (0x590 or 0x591)");
437 module_param(radio_nr, int, 0);
439 static void __exit terratec_cleanup_module(void)
441 video_unregister_device(&terratec_radio);
442 release_region(io,2);
443 printk(KERN_INFO "TERRATEC ActivRadio Standalone card driver unloaded.\n");
446 module_init(terratec_init);
447 module_exit(terratec_cleanup_module);