1 files changed, 304 insertions, 0 deletions
diff --git a/drivers/media/radio/radio-gemtek.c b/drivers/media/radio/radio-gemtek.c
new file mode 100644
index 000000000000..202bfe6819b8
--- /dev/null
+++ b/drivers/media/radio/radio-gemtek.c
@@ -0,0 +1,304 @@
+/* GemTek radio card driver for Linux (C) 1998 Jonas Munsin <jmunsin@iki.fi>
+ *
+ * GemTek hasn't released any specs on the card, so the protocol had to
+ * be reverse engineered with dosemu.
+ *
+ * Besides the protocol changes, this is mostly a copy of:
+ *
+ *    RadioTrack II driver for Linux radio support (C) 1998 Ben Pfaff
+ * 
+ *    Based on RadioTrack I/RadioReveal (C) 1997 M. Kirkwood
+ *    Converted to new API by Alan Cox <Alan.Cox@linux.org>
+ *    Various bugfixes and enhancements by Russell Kroll <rkroll@exploits.org>
+ *
+ * TODO: Allow for more than one of these foolish entities :-)
+ *
+ */
+
+#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_GEMTEK_PORT 	*/
+#include <linux/spinlock.h>
+
+#ifndef CONFIG_RADIO_GEMTEK_PORT
+#define CONFIG_RADIO_GEMTEK_PORT -1
+#endif
+
+static int io = CONFIG_RADIO_GEMTEK_PORT; 
+static int radio_nr = -1;
+static spinlock_t lock;
+
+struct gemtek_device
+{
+	int port;
+	unsigned long curfreq;
+	int muted;
+};
+
+
+/* local things */
+
+/* the correct way to mute the gemtek may be to write the last written
+ * frequency || 0x10, but just writing 0x10 once seems to do it as well
+ */
+static void gemtek_mute(struct gemtek_device *dev)
+{
+        if(dev->muted)
+		return;
+	spin_lock(&lock);
+	outb(0x10, io);
+	spin_unlock(&lock);
+	dev->muted = 1;
+}
+
+static void gemtek_unmute(struct gemtek_device *dev)
+{
+	if(dev->muted == 0)
+		return;
+	spin_lock(&lock);
+	outb(0x20, io);
+	spin_unlock(&lock);
+	dev->muted = 0;
+}
+
+static void zero(void)
+{
+	outb_p(0x04, io);
+	udelay(5);
+	outb_p(0x05, io);
+	udelay(5);
+}
+
+static void one(void)
+{
+	outb_p(0x06, io);
+	udelay(5);
+	outb_p(0x07, io);
+	udelay(5);
+}
+
+static int gemtek_setfreq(struct gemtek_device *dev, unsigned long freq)
+{
+	int i;
+
+/*        freq = 78.25*((float)freq/16000.0 + 10.52); */
+
+	freq /= 16;
+	freq += 10520;
+	freq *= 7825;
+	freq /= 100000;
+
+	spin_lock(&lock);
+	
+	/* 2 start bits */
+	outb_p(0x03, io);
+	udelay(5);
+	outb_p(0x07, io);
+	udelay(5);
+
+        /* 28 frequency bits (lsb first) */
+	for (i = 0; i < 14; i++)
+		if (freq & (1 << i))
+			one();
+		else
+			zero();
+        /* 36 unknown bits */
+	for (i = 0; i < 11; i++)
+		zero();
+	one();
+	for (i = 0; i < 4; i++)
+		zero();
+	one();
+	zero();
+
+	/* 2 end bits */
+	outb_p(0x03, io);
+	udelay(5);
+	outb_p(0x07, io);
+	udelay(5);
+
+	spin_unlock(&lock);
+	
+	return 0;
+}
+
+static int gemtek_getsigstr(struct gemtek_device *dev)
+{
+	spin_lock(&lock);
+	inb(io);
+	udelay(5);
+	spin_unlock(&lock);
+	if (inb(io) & 8)		/* bit set = no signal present */
+		return 0;
+	return 1;		/* signal present */
+}
+
+static int gemtek_do_ioctl(struct inode *inode, struct file *file,
+			   unsigned int cmd, void *arg)
+{
+	struct video_device *dev = video_devdata(file);
+	struct gemtek_device *rt=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, "GemTek");
+			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;
+			v->signal=0xFFFF*gemtek_getsigstr(rt);
+			strcpy(v->name, "FM");
+			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 = rt->curfreq;
+			return 0;
+		}
+		case VIDIOCSFREQ:
+		{
+			unsigned long *freq = arg;
+			rt->curfreq = *freq;
+			/* needs to be called twice in order for getsigstr to work */
+			gemtek_setfreq(rt, rt->curfreq);
+			gemtek_setfreq(rt, rt->curfreq);
+			return 0;
+		}
+		case VIDIOCGAUDIO:
+		{	
+			struct video_audio *v = arg;
+			memset(v,0, sizeof(*v));
+			v->flags|=VIDEO_AUDIO_MUTABLE;
+			v->volume=1;
+			v->step=65535;
+			strcpy(v->name, "Radio");
+			return 0;			
+		}
+		case VIDIOCSAUDIO:
+		{
+			struct video_audio *v = arg;
+			if(v->audio) 
+				return -EINVAL;
+
+			if(v->flags&VIDEO_AUDIO_MUTE) 
+				gemtek_mute(rt);
+			else
+			        gemtek_unmute(rt);
+
+			return 0;
+		}
+		default:
+			return -ENOIOCTLCMD;
+	}
+}
+
+static int gemtek_ioctl(struct inode *inode, struct file *file,
+			unsigned int cmd, unsigned long arg)
+{
+	return video_usercopy(inode, file, cmd, arg, gemtek_do_ioctl);
+}
+
+static struct gemtek_device gemtek_unit;
+
+static struct file_operations gemtek_fops = {
+	.owner		= THIS_MODULE,
+	.open           = video_exclusive_open,
+	.release        = video_exclusive_release,
+	.ioctl		= gemtek_ioctl,
+	.llseek         = no_llseek,
+};
+
+static struct video_device gemtek_radio=
+{
+	.owner		= THIS_MODULE,
+	.name		= "GemTek radio",
+	.type		= VID_TYPE_TUNER,
+	.hardware	= VID_HARDWARE_GEMTEK,
+	.fops           = &gemtek_fops,
+};
+
+static int __init gemtek_init(void)
+{
+	if(io==-1)
+	{
+		printk(KERN_ERR "You must set an I/O address with io=0x20c, io=0x30c, io=0x24c or io=0x34c (io=0x020c or io=0x248 for the combined sound/radiocard)\n");
+		return -EINVAL;
+	}
+
+	if (!request_region(io, 4, "gemtek")) 
+	{
+		printk(KERN_ERR "gemtek: port 0x%x already in use\n", io);
+		return -EBUSY;
+	}
+
+	gemtek_radio.priv=&gemtek_unit;
+	
+	if(video_register_device(&gemtek_radio, VFL_TYPE_RADIO, radio_nr)==-1)
+	{
+		release_region(io, 4);
+		return -EINVAL;
+	}
+	printk(KERN_INFO "GemTek Radio Card driver.\n");
+
+	spin_lock_init(&lock);
+
+	/* this is _maybe_ unnecessary */
+	outb(0x01, io);
+
+ 	/* mute card - prevents noisy bootups */
+	gemtek_unit.muted = 0;
+	gemtek_mute(&gemtek_unit);
+
+	return 0;
+}
+
+MODULE_AUTHOR("Jonas Munsin");
+MODULE_DESCRIPTION("A driver for the GemTek Radio Card");
+MODULE_LICENSE("GPL");
+
+module_param(io, int, 0);
+MODULE_PARM_DESC(io, "I/O address of the GemTek card (0x20c, 0x30c, 0x24c or 0x34c (0x20c or 0x248 have been reported to work for the combined sound/radiocard)).");
+module_param(radio_nr, int, 0);
+
+static void __exit gemtek_cleanup(void)
+{
+	video_unregister_device(&gemtek_radio);
+	release_region(io,4);
+}
+
+module_init(gemtek_init);
+module_exit(gemtek_cleanup);
+
+/*
+  Local variables:
+  compile-command: "gcc -c -DMODVERSIONS -D__KERNEL__ -DMODULE -O6 -Wall -Wstrict-prototypes -I /home/blp/tmp/linux-2.1.111-rtrack/include radio-rtrack2.c"
+  End:
+*/