patch-2.1.116 linux/drivers/char/radio-rtrack2.c

• Lines: 273
• Date: Sun Aug 9 12:18:37 1998
• Orig file: v2.1.115/linux/drivers/char/radio-rtrack2.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.1.115/linux/drivers/char/radio-rtrack2.c linux/drivers/char/radio-rtrack2.c
@@ -0,0 +1,272 @@
+/* RadioTrack II driver for Linux radio support (C) 1998 Ben Pfaff
+ * 
+ * Based on RadioTrack I/RadioReveal (C) 1997 M. Kirkwood
+ * Coverted 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_RTRACK2_PORT 	*/
+
+#ifndef CONFIG_RADIO_RTRACK2_PORT
+#define CONFIG_RADIO_RTRACK2_PORT -1
+#endif
+
+static int io = CONFIG_RADIO_RTRACK2_PORT; 
+static int users = 0;
+
+struct rt_device
+{
+	int port;
+	unsigned long curfreq;
+	int muted;
+};
+
+
+/* local things */
+
+static void rt_mute(struct rt_device *dev)
+{
+        if(dev->muted)
+		return;
+	outb(1, io);
+	dev->muted = 1;
+}
+
+static void rt_unmute(struct rt_device *dev)
+{
+	if(dev->muted == 0)
+		return;
+	outb(0, io);
+	dev->muted = 0;
+}
+
+static void zero(void)
+{
+        outb_p(1, io);
+	outb_p(3, io);
+	outb_p(1, io);
+}
+
+static void one(void)
+{
+        outb_p(5, io);
+	outb_p(7, io);
+	outb_p(5, io);
+}
+
+static int rt_setfreq(struct rt_device *dev, unsigned long freq)
+{
+	int i;
+
+	freq = freq / 200 + 856;
+
+	outb_p(0xc8, io);
+	outb_p(0xc9, io);
+	outb_p(0xc9, io);
+
+	for (i = 0; i < 10; i++)
+		zero ();
+
+	for (i = 14; i >= 0; i--)
+		if (freq & (1 << i))
+			one ();
+		else
+			zero ();
+
+	outb_p(0xc8, io);
+	if (!dev->muted)
+	  outb_p(0, io);
+	return 0;
+}
+
+int rt_getsigstr(struct rt_device *dev)
+{
+	if (inb(io) & 2)	/* bit set = no signal present	*/
+		return 0;
+	return 1;		/* signal present		*/
+}
+
+static int rt_ioctl(struct video_device *dev, unsigned int cmd, void *arg)
+{
+	struct rt_device *rt=dev->priv;
+
+	switch(cmd)
+	{
+		case VIDIOCGCAP:
+		{
+			struct video_capability v;
+			v.type=VID_TYPE_TUNER;
+			v.channels=1;
+			v.audios=1;
+			/* No we don't do pictures */
+			v.maxwidth=0;
+			v.maxheight=0;
+			v.minwidth=0;
+			v.minheight=0;
+			if(copy_to_user(arg,&v,sizeof(v)))
+				return -EFAULT;
+			return 0;
+		}
+		case VIDIOCGTUNER:
+		{
+			struct video_tuner v;
+			if(copy_from_user(&v, arg,sizeof(v))!=0) 
+				return -EFAULT;
+			if(v.tuner)	/* Only 1 tuner */ 
+				return -EINVAL;
+			v.rangelow=88*16000;
+			v.rangehigh=108*16000;
+			v.flags=VIDEO_TUNER_LOW;
+			v.mode=VIDEO_MODE_AUTO;
+			v.signal=0xFFFF*rt_getsigstr(rt);
+			if(copy_to_user(arg,&v, sizeof(v)))
+				return -EFAULT;
+			return 0;
+		}
+		case VIDIOCSTUNER:
+		{
+			struct video_tuner v;
+			if(copy_from_user(&v, arg, sizeof(v)))
+				return -EFAULT;
+			if(v.tuner!=0)
+				return -EINVAL;
+			/* Only 1 tuner so no setting needed ! */
+			return 0;
+		}
+		case VIDIOCGFREQ:
+			if(copy_to_user(arg, &rt->curfreq, sizeof(rt->curfreq)))
+				return -EFAULT;
+			return 0;
+		case VIDIOCSFREQ:
+			if(copy_from_user(&rt->curfreq, arg,sizeof(rt->curfreq)))
+				return -EFAULT;
+			rt_setfreq(rt, rt->curfreq);
+			return 0;
+		case VIDIOCGAUDIO:
+		{	
+			struct video_audio v;
+			memset(&v,0, sizeof(v));
+			v.flags|=VIDEO_AUDIO_MUTABLE;
+			v.volume=1;
+			strcpy(v.name, "Radio");
+			if(copy_to_user(arg,&v, sizeof(v)))
+				return -EFAULT;
+			return 0;			
+		}
+		case VIDIOCSAUDIO:
+		{
+			struct video_audio v;
+			if(copy_from_user(&v, arg, sizeof(v))) 
+				return -EFAULT;	
+			if(v.audio) 
+				return -EINVAL;
+
+			if(v.flags&VIDEO_AUDIO_MUTE) 
+				rt_mute(rt);
+			else
+			        rt_unmute(rt);
+
+			return 0;
+		}
+		default:
+			return -ENOIOCTLCMD;
+	}
+}
+
+static int rt_open(struct video_device *dev, int flags)
+{
+	if(users)
+		return -EBUSY;
+	users++;
+	MOD_INC_USE_COUNT;
+	return 0;
+}
+
+static void rt_close(struct video_device *dev)
+{
+	users--;
+	MOD_DEC_USE_COUNT;
+}
+
+static struct rt_device rtrack2_unit;
+
+static struct video_device rtrack2_radio=
+{
+	"RadioTrack II radio",
+	VID_TYPE_TUNER,
+	VID_HARDWARE_RTRACK2,
+	rt_open,
+	rt_close,
+	NULL,	/* Can't read  (no capture ability) */
+	NULL,	/* Can't write */
+	NULL,	/* Can't poll */
+	rt_ioctl,
+	NULL,
+	NULL
+};
+
+__initfunc(int rtrack2_init(struct video_init *v))
+{
+	if (check_region(io, 4)) 
+	{
+		printk(KERN_ERR "rtrack2: port 0x%x already in use\n", io);
+		return -EBUSY;
+	}
+
+	rtrack2_radio.priv=&rtrack2_unit;
+	
+	if(video_register_device(&rtrack2_radio, VFL_TYPE_RADIO)==-1)
+		return -EINVAL;
+		
+	request_region(io, 4, "rtrack2");
+	printk(KERN_INFO "AIMSlab Radiotrack II card driver.\n");
+
+ 	/* mute card - prevents noisy bootups */
+	outb(1, io);
+	rtrack2_unit.muted = 1;
+
+	return 0;
+}
+
+#ifdef MODULE
+
+MODULE_AUTHOR("Ben Pfaff");
+MODULE_DESCRIPTION("A driver for the RadioTrack II radio card.");
+MODULE_PARM(io, "i");
+MODULE_PARM_DESC(io, "I/O address of the RadioTrack card (0x20c or 0x30c)");
+
+EXPORT_NO_SYMBOLS;
+
+int init_module(void)
+{
+	if(io==-1)
+	{
+		printk(KERN_ERR "You must set an I/O address with io=0x20c or io=0x30c\n");
+		return -EINVAL;
+	}
+	return rtrack2_init(NULL);
+}
+
+void cleanup_module(void)
+{
+	video_unregister_device(&rtrack2_radio);
+	release_region(io,4);
+}
+
+#endif
+
+/*
+  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:
+*/