patch-2.4.0-test7 linux/drivers/char/radio-zoltrix.c

• Lines: 413
• Date: Wed Dec 31 16:00:00 1969
• Orig file: v2.4.0-test6/linux/drivers/char/radio-zoltrix.c
• Orig date: Mon Nov 1 13:56:26 1999

diff -u --recursive --new-file v2.4.0-test6/linux/drivers/char/radio-zoltrix.c linux/drivers/char/radio-zoltrix.c
@@ -1,412 +0,0 @@
-/* zoltrix radio plus driver for Linux radio support
- * (c) 1998 C. van Schaik <carl@leg.uct.ac.za>
- *
- * BUGS  
- *  Due to the inconsistancy in reading from the signal flags
- *  it is difficult to get an accurate tuned signal.
- *
- *  It seems that the card is not linear to 0 volume. It cuts off
- *  at a low volume, and it is not possible (at least I have not found)
- *  to get fine volume control over the low volume range.
- *
- *  Some code derived from code by Romolo Manfredini
- *				   romolo@bicnet.it
- *
- * 1999-05-06 - (C. van Schaik)
- *	      - Make signal strength and stereo scans
- *	        kinder to cpu while in delay
- * 1999-01-05 - (C. van Schaik)
- *	      - Changed tuning to 1/160Mhz accuracy
- *	      - Added stereo support
- *		(card defaults to stereo)
- *		(can explicitly force mono on the card)
- *		(can detect if station is in stereo)
- *	      - Added unmute function
- *	      - Reworked ioctl functions
- */
-
-#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_ZOLTRIX_PORT      */
-
-#ifndef CONFIG_RADIO_ZOLTRIX_PORT
-#define CONFIG_RADIO_ZOLTRIX_PORT -1
-#endif
-
-static int io = CONFIG_RADIO_ZOLTRIX_PORT;
-static int users = 0;
-
-struct zol_device {
-	int port;
-	int curvol;
-	unsigned long curfreq;
-	int muted;
-	unsigned int stereo;
-	struct semaphore lock;
-};
-
-
-/* local things */
-
-static void sleep_delay(void)
-{
-	/* Sleep nicely for +/- 10 mS */
-	schedule();
-}
-
-static int zol_setvol(struct zol_device *dev, int vol)
-{
-	dev->curvol = vol;
-	if (dev->muted)
-		return 0;
-
-	down(&dev->lock);
-	if (vol == 0) {
-		outb(0, io);
-		outb(0, io);
-		inb(io + 3);    /* Zoltrix needs to be read to confirm */
-		up(&dev->lock);
-		return 0;
-	}
-
-	outb(dev->curvol-1, io);
-	sleep_delay();
-	inb(io + 2);
-	up(&dev->lock);
-	return 0;
-}
-
-static void zol_mute(struct zol_device *dev)
-{
-	dev->muted = 1;
-	down(&dev->lock);
-	outb(0, io);
-	outb(0, io);
-	inb(io + 3);            /* Zoltrix needs to be read to confirm */
-	up(&dev->lock);
-}
-
-static void zol_unmute(struct zol_device *dev)
-{
-	dev->muted = 0;
-	zol_setvol(dev, dev->curvol);
-}
-
-static int zol_setfreq(struct zol_device *dev, unsigned long freq)
-{
-	/* tunes the radio to the desired frequency */
-	unsigned long long bitmask, f, m;
-	unsigned int stereo = dev->stereo;
-	int i;
-
-	if (freq == 0)
-		return 1;
-	m = (freq / 160 - 8800) * 2;
-	f = (unsigned long long) m + 0x4d1c;
-
-	bitmask = 0xc480402c10080000ull;
-	i = 45;
-
-	down(&dev->lock);
-	
-	outb(0, io);
-	outb(0, io);
-	inb(io + 3);            /* Zoltrix needs to be read to confirm */
-
-	outb(0x40, io);
-	outb(0xc0, io);
-
-	bitmask = (bitmask ^ ((f & 0xff) << 47) ^ ((f & 0xff00) << 30) ^ ( stereo << 31));
-	while (i--) {
-		if ((bitmask & 0x8000000000000000ull) != 0) {
-			outb(0x80, io);
-			udelay(50);
-			outb(0x00, io);
-			udelay(50);
-			outb(0x80, io);
-			udelay(50);
-		} else {
-			outb(0xc0, io);
-			udelay(50);
-			outb(0x40, io);
-			udelay(50);
-			outb(0xc0, io);
-			udelay(50);
-		}
-		bitmask *= 2;
-	}
-	/* termination sequence */
-	outb(0x80, io);
-	outb(0xc0, io);
-	outb(0x40, io);
-	udelay(1000);
-	inb(io+2);
-
-        udelay(1000);
-        
-	if (dev->muted)
-	{
-		outb(0, io);
-		outb(0, io);
-		inb(io + 3);
-		udelay(1000);
-	}
-	
-	up(&dev->lock);
-	
-	if(!dev->muted)
-	{
-	        zol_setvol(dev, dev->curvol);
-	}
-	return 0;
-}
-
-/* Get signal strength */
-
-int zol_getsigstr(struct zol_device *dev)
-{
-	int a, b;
-
-	down(&dev->lock);
-	outb(0x00, io);         /* This stuff I found to do nothing */
-	outb(dev->curvol, io);
-	sleep_delay();
-	sleep_delay();
-
-	a = inb(io);
-	sleep_delay();
-	b = inb(io);
-
-	up(&dev->lock);
-	
-	if (a != b)
-		return (0);
-
-        if ((a == 0xcf) || (a == 0xdf)  /* I found this out by playing */
-		|| (a == 0xef))       /* with a binary scanner on the card io */
-		return (1);
- 	return (0);
-}
-
-int zol_is_stereo (struct zol_device *dev)
-{
-	int x1, x2;
-
-	down(&dev->lock);
-	
-	outb(0x00, io);
-	outb(dev->curvol, io);
-	sleep_delay();
-	sleep_delay();
-
-	x1 = inb(io);
-	sleep_delay();
-	x2 = inb(io);
-
-	up(&dev->lock);
-	
-	if ((x1 == x2) && (x1 == 0xcf))
-		return 1;
-	return 0;
-}
-
-static int zol_ioctl(struct video_device *dev, unsigned int cmd, void *arg)
-{
-	struct zol_device *zol = dev->priv;
-
-	switch (cmd) {
-	case VIDIOCGCAP:
-		{
-			struct video_capability v;
-			v.type = VID_TYPE_TUNER;
-			v.channels = 1 + zol->stereo;
-			v.audios = 1;
-			/* No we don't do pictures */
-			v.maxwidth = 0;
-			v.maxheight = 0;
-			v.minwidth = 0;
-			v.minheight = 0;
-			strcpy(v.name, "Zoltrix Radio");
-			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)))
-				return -EFAULT;
-			if (v.tuner)	
-				return -EINVAL;
-			strcpy(v.name, "FM");
-			v.rangelow = (int) (88.0 * 16000);
-			v.rangehigh = (int) (108.0 * 16000);
-			v.flags = zol_is_stereo(zol)
-					? VIDEO_TUNER_STEREO_ON : 0;
-			v.flags |= VIDEO_TUNER_LOW;
-			v.mode = VIDEO_MODE_AUTO;
-			v.signal = 0xFFFF * zol_getsigstr(zol);
-			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, &zol->curfreq, sizeof(zol->curfreq)))
-			return -EFAULT;
-		return 0;
-	case VIDIOCSFREQ:
-		if (copy_from_user(&zol->curfreq, arg, sizeof(zol->curfreq)))
-			return -EFAULT;
-		zol_setfreq(zol, zol->curfreq);
-		return 0;
-	case VIDIOCGAUDIO:
-		{
-			struct video_audio v;
-			memset(&v, 0, sizeof(v));
-			v.flags |= VIDEO_AUDIO_MUTABLE | VIDEO_AUDIO_VOLUME;
-			v.mode != zol_is_stereo(zol)
-				? VIDEO_SOUND_STEREO : VIDEO_SOUND_MONO;
-			v.volume = zol->curvol * 4096;
-			v.step = 4096;
-			strcpy(v.name, "Zoltrix 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)
-				zol_mute(zol);
-			else
-			{
-				zol_unmute(zol);
-				zol_setvol(zol, v.volume / 4096);
-			}
-
-			if (v.mode & VIDEO_SOUND_STEREO)
-			{
-				zol->stereo = 1;
-				zol_setfreq(zol, zol->curfreq);
-			}
-			if (v.mode & VIDEO_SOUND_MONO)
-			{
-				zol->stereo = 0;
-				zol_setfreq(zol, zol->curfreq);
-			}
-
-			return 0;
-		}
-	default:
-		return -ENOIOCTLCMD;
-	}
-}
-
-static int zol_open(struct video_device *dev, int flags)
-{
-	if (users)
-		return -EBUSY;
-	users++;
-	MOD_INC_USE_COUNT;
-	return 0;
-}
-
-static void zol_close(struct video_device *dev)
-{
-	users--;
-	MOD_DEC_USE_COUNT;
-}
-
-static struct zol_device zoltrix_unit;
-
-static struct video_device zoltrix_radio =
-{
-	"Zoltrix Radio Plus",
-	VID_TYPE_TUNER,
-	VID_HARDWARE_ZOLTRIX,
-	zol_open,
-	zol_close,
-	NULL,			/* Can't read  (no capture ability) */
-	NULL,			/* Can't write */
-	NULL,
-	zol_ioctl,
-	NULL,
-	NULL
-};
-
-static int __init zoltrix_init(void)
-{
-	if (io == -1) {
-		printk(KERN_ERR "You must set an I/O address with io=0x???\n");
-		return -EINVAL;
-	}
-	if (check_region(io, 2)) {
-		printk(KERN_ERR "zoltrix: port 0x%x already in use\n", io);
-		return -EBUSY;
-	}
-	if ((io != 0x20c) && (io != 0x30c)) {
-		printk(KERN_ERR "zoltrix: invalid port, try 0x20c or 0x30c\n");
-		return -ENXIO;
-	}
-	zoltrix_radio.priv = &zoltrix_unit;
-
-	if (video_register_device(&zoltrix_radio, VFL_TYPE_RADIO) == -1)
-		return -EINVAL;
-
-	request_region(io, 2, "zoltrix");
-	printk(KERN_INFO "Zoltrix Radio Plus card driver.\n");
-
-	init_MUTEX(&zoltrix_unit.lock);
-	
-	/* mute card - prevents noisy bootups */
-
-	/* this ensures that the volume is all the way down  */
-
-	outb(0, io);
-	outb(0, io);
-	sleep_delay();
-	sleep_delay();
-	inb(io + 3);
-
-	zoltrix_unit.curvol = 0;
-	zoltrix_unit.stereo = 1;
-
-	return 0;
-}
-
-MODULE_AUTHOR("C.van Schaik");
-MODULE_DESCRIPTION("A driver for the Zoltrix Radio Plus.");
-MODULE_PARM(io, "i");
-MODULE_PARM_DESC(io, "I/O address of the Zoltrix Radio Plus (0x20c or 0x30c)");
-
-EXPORT_NO_SYMBOLS;
-
-static void __exit zoltrix_cleanup_module(void)
-{
-	video_unregister_device(&zoltrix_radio);
-	release_region(io, 2);
-}
-
-module_init(zoltrix_init);
-module_exit(zoltrix_cleanup_module);
-