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-rw-r--r--drivers/media/radio/radio-terratec.c341
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diff --git a/drivers/media/radio/radio-terratec.c b/drivers/media/radio/radio-terratec.c
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index 000000000000..248d67fde037
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+++ b/drivers/media/radio/radio-terratec.c
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+/* Terratec ActiveRadio ISA Standalone card driver for Linux radio support
+ * (c) 1999 R. Offermanns (rolf@offermanns.de)
+ * based on the aimslab radio driver from M. Kirkwood
+ * many thanks to Michael Becker and Friedhelm Birth (from TerraTec)
+ *
+ *
+ * History:
+ * 1999-05-21 First preview release
+ *
+ * Notes on the hardware:
+ * There are two "main" chips on the card:
+ * - Philips OM5610 (http://www-us.semiconductors.philips.com/acrobat/datasheets/OM5610_2.pdf)
+ * - Philips SAA6588 (http://www-us.semiconductors.philips.com/acrobat/datasheets/SAA6588_1.pdf)
+ * (you can get the datasheet at the above links)
+ *
+ * Frequency control is done digitally -- ie out(port,encodefreq(95.8));
+ * Volume Control is done digitally
+ *
+ * there is a I2C controlled RDS decoder (SAA6588) onboard, which i would like to support someday
+ * (as soon i have understand how to get started :)
+ * If you can help me out with that, please contact me!!
+ *
+ *
+ */
+
+#include <linux/module.h> /* Modules */
+#include <linux/init.h> /* Initdata */
+#include <linux/ioport.h> /* check_region, request_region */
+#include <linux/delay.h> /* udelay */
+#include <asm/io.h> /* outb, outb_p */
+#include <asm/uaccess.h> /* copy to/from user */
+#include <linux/videodev.h> /* kernel radio structs */
+#include <linux/config.h> /* CONFIG_RADIO_TERRATEC_PORT */
+#include <linux/spinlock.h>
+
+#ifndef CONFIG_RADIO_TERRATEC_PORT
+#define CONFIG_RADIO_TERRATEC_PORT 0x590
+#endif
+
+/**************** this ones are for the terratec *******************/
+#define BASEPORT 0x590
+#define VOLPORT 0x591
+#define WRT_DIS 0x00
+#define CLK_OFF 0x00
+#define IIC_DATA 0x01
+#define IIC_CLK 0x02
+#define DATA 0x04
+#define CLK_ON 0x08
+#define WRT_EN 0x10
+/*******************************************************************/
+
+static int io = CONFIG_RADIO_TERRATEC_PORT;
+static int radio_nr = -1;
+static spinlock_t lock;
+
+struct tt_device
+{
+ int port;
+ int curvol;
+ unsigned long curfreq;
+ int muted;
+};
+
+
+/* local things */
+
+static void cardWriteVol(int volume)
+{
+ int i;
+ volume = volume+(volume * 32); // change both channels
+ spin_lock(&lock);
+ for (i=0;i<8;i++)
+ {
+ if (volume & (0x80>>i))
+ outb(0x80, VOLPORT);
+ else outb(0x00, VOLPORT);
+ }
+ spin_unlock(&lock);
+}
+
+
+
+static void tt_mute(struct tt_device *dev)
+{
+ dev->muted = 1;
+ cardWriteVol(0);
+}
+
+static int tt_setvol(struct tt_device *dev, int vol)
+{
+
+// printk(KERN_ERR "setvol called, vol = %d\n", vol);
+
+ if(vol == dev->curvol) { /* requested volume = current */
+ if (dev->muted) { /* user is unmuting the card */
+ dev->muted = 0;
+ cardWriteVol(vol); /* enable card */
+ }
+
+ return 0;
+ }
+
+ if(vol == 0) { /* volume = 0 means mute the card */
+ cardWriteVol(0); /* "turn off card" by setting vol to 0 */
+ dev->curvol = vol; /* track the volume state! */
+ return 0;
+ }
+
+ dev->muted = 0;
+
+ cardWriteVol(vol);
+
+ dev->curvol = vol;
+
+ return 0;
+
+}
+
+
+/* this is the worst part in this driver */
+/* many more or less strange things are going on here, but hey, it works :) */
+
+static int tt_setfreq(struct tt_device *dev, unsigned long freq1)
+{
+ int freq;
+ int i;
+ int p;
+ int temp;
+ long rest;
+
+ unsigned char buffer[25]; /* we have to bit shift 25 registers */
+ freq = freq1/160; /* convert the freq. to a nice to handle value */
+ for(i=24;i>-1;i--)
+ buffer[i]=0;
+
+ rest = freq*10+10700; /* i once had understood what is going on here */
+ /* maybe some wise guy (friedhelm?) can comment this stuff */
+ i=13;
+ p=10;
+ temp=102400;
+ while (rest!=0)
+ {
+ if (rest%temp == rest)
+ buffer[i] = 0;
+ else
+ {
+ buffer[i] = 1;
+ rest = rest-temp;
+ }
+ i--;
+ p--;
+ temp = temp/2;
+ }
+
+ spin_lock(&lock);
+
+ for (i=24;i>-1;i--) /* bit shift the values to the radiocard */
+ {
+ if (buffer[i]==1)
+ {
+ outb(WRT_EN|DATA, BASEPORT);
+ outb(WRT_EN|DATA|CLK_ON , BASEPORT);
+ outb(WRT_EN|DATA, BASEPORT);
+ }
+ else
+ {
+ outb(WRT_EN|0x00, BASEPORT);
+ outb(WRT_EN|0x00|CLK_ON , BASEPORT);
+ }
+ }
+ outb(0x00, BASEPORT);
+
+ spin_unlock(&lock);
+
+ return 0;
+}
+
+static int tt_getsigstr(struct tt_device *dev) /* TODO */
+{
+ if (inb(io) & 2) /* bit set = no signal present */
+ return 0;
+ return 1; /* signal present */
+}
+
+
+/* implement the video4linux api */
+
+static int tt_do_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd, void *arg)
+{
+ struct video_device *dev = video_devdata(file);
+ struct tt_device *tt=dev->priv;
+
+ switch(cmd)
+ {
+ case VIDIOCGCAP:
+ {
+ struct video_capability *v = arg;
+ memset(v,0,sizeof(*v));
+ v->type=VID_TYPE_TUNER;
+ v->channels=1;
+ v->audios=1;
+ strcpy(v->name, "ActiveRadio");
+ return 0;
+ }
+ case VIDIOCGTUNER:
+ {
+ struct video_tuner *v = arg;
+ if(v->tuner) /* Only 1 tuner */
+ return -EINVAL;
+ v->rangelow=(87*16000);
+ v->rangehigh=(108*16000);
+ v->flags=VIDEO_TUNER_LOW;
+ v->mode=VIDEO_MODE_AUTO;
+ strcpy(v->name, "FM");
+ v->signal=0xFFFF*tt_getsigstr(tt);
+ return 0;
+ }
+ case VIDIOCSTUNER:
+ {
+ struct video_tuner *v = arg;
+ if(v->tuner!=0)
+ return -EINVAL;
+ /* Only 1 tuner so no setting needed ! */
+ return 0;
+ }
+ case VIDIOCGFREQ:
+ {
+ unsigned long *freq = arg;
+ *freq = tt->curfreq;
+ return 0;
+ }
+ case VIDIOCSFREQ:
+ {
+ unsigned long *freq = arg;
+ tt->curfreq = *freq;
+ tt_setfreq(tt, tt->curfreq);
+ return 0;
+ }
+ case VIDIOCGAUDIO:
+ {
+ struct video_audio *v = arg;
+ memset(v,0, sizeof(*v));
+ v->flags|=VIDEO_AUDIO_MUTABLE|VIDEO_AUDIO_VOLUME;
+ v->volume=tt->curvol * 6554;
+ v->step=6554;
+ strcpy(v->name, "Radio");
+ return 0;
+ }
+ case VIDIOCSAUDIO:
+ {
+ struct video_audio *v = arg;
+ if(v->audio)
+ return -EINVAL;
+ if(v->flags&VIDEO_AUDIO_MUTE)
+ tt_mute(tt);
+ else
+ tt_setvol(tt,v->volume/6554);
+ return 0;
+ }
+ default:
+ return -ENOIOCTLCMD;
+ }
+}
+
+static int tt_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ return video_usercopy(inode, file, cmd, arg, tt_do_ioctl);
+}
+
+static struct tt_device terratec_unit;
+
+static struct file_operations terratec_fops = {
+ .owner = THIS_MODULE,
+ .open = video_exclusive_open,
+ .release = video_exclusive_release,
+ .ioctl = tt_ioctl,
+ .llseek = no_llseek,
+};
+
+static struct video_device terratec_radio=
+{
+ .owner = THIS_MODULE,
+ .name = "TerraTec ActiveRadio",
+ .type = VID_TYPE_TUNER,
+ .hardware = VID_HARDWARE_TERRATEC,
+ .fops = &terratec_fops,
+};
+
+static int __init terratec_init(void)
+{
+ if(io==-1)
+ {
+ printk(KERN_ERR "You must set an I/O address with io=0x???\n");
+ return -EINVAL;
+ }
+ if (!request_region(io, 2, "terratec"))
+ {
+ printk(KERN_ERR "TerraTec: port 0x%x already in use\n", io);
+ return -EBUSY;
+ }
+
+ terratec_radio.priv=&terratec_unit;
+
+ spin_lock_init(&lock);
+
+ if(video_register_device(&terratec_radio, VFL_TYPE_RADIO, radio_nr)==-1)
+ {
+ release_region(io,2);
+ return -EINVAL;
+ }
+
+ printk(KERN_INFO "TERRATEC ActivRadio Standalone card driver.\n");
+
+ /* mute card - prevents noisy bootups */
+
+ /* this ensures that the volume is all the way down */
+ cardWriteVol(0);
+ terratec_unit.curvol = 0;
+
+ return 0;
+}
+
+MODULE_AUTHOR("R.OFFERMANNS & others");
+MODULE_DESCRIPTION("A driver for the TerraTec ActiveRadio Standalone radio card.");
+MODULE_LICENSE("GPL");
+module_param(io, int, 0);
+MODULE_PARM_DESC(io, "I/O address of the TerraTec ActiveRadio card (0x590 or 0x591)");
+module_param(radio_nr, int, 0);
+
+static void __exit terratec_cleanup_module(void)
+{
+ video_unregister_device(&terratec_radio);
+ release_region(io,2);
+ printk(KERN_INFO "TERRATEC ActivRadio Standalone card driver unloaded.\n");
+}
+
+module_init(terratec_init);
+module_exit(terratec_cleanup_module);
+
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.