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

• Lines: 403
• Date: Wed Dec 31 16:00:00 1969
• Orig file: v2.4.0-test6/linux/drivers/char/radio-typhoon.c
• Orig date: Wed Aug 9 19:19:50 2000

diff -u --recursive --new-file v2.4.0-test6/linux/drivers/char/radio-typhoon.c linux/drivers/char/radio-typhoon.c
@@ -1,402 +0,0 @@
-/* Typhoon Radio Card driver for radio support
- * (c) 1999 Dr. Henrik Seidel <Henrik.Seidel@gmx.de>
- *
- * Card manufacturer:
- * http://194.18.155.92/idc/prod2.idc?nr=50753&lang=e
- *
- * Notes on the hardware
- *
- * This card has two output sockets, one for speakers and one for line.
- * The speaker output has volume control, but only in four discrete
- * steps. The line output has neither volume control nor mute.
- *
- * The card has auto-stereo according to its manual, although it all
- * sounds mono to me (even with the Win/DOS drivers). Maybe it's my
- * antenna - I really don't know for sure.
- *
- * Frequency control is done digitally.
- *
- * Volume control is done digitally, but there are only four different
- * possible values. So you should better always turn the volume up and
- * use line control. I got the best results by connecting line output
- * to the sound card microphone input. For such a configuration the
- * volume control has no effect, since volume control only influences
- * the speaker output.
- *
- * There is no explicit mute/unmute. So I set the radio frequency to a
- * value where I do expect just noise and turn the speaker volume down.
- * The frequency change is necessary since the card never seems to be
- * completely silent.
- */
-
-#include <linux/module.h>	/* Modules                        */
-#include <linux/init.h>		/* Initdata                       */
-#include <linux/ioport.h>	/* check_region, request_region   */
-#include <linux/proc_fs.h>	/* radio card status report	  */
-#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_TYPHOON_*         */
-
-#define BANNER "Typhoon Radio Card driver v0.1\n"
-
-#ifndef CONFIG_RADIO_TYPHOON_PORT
-#define CONFIG_RADIO_TYPHOON_PORT -1
-#endif
-
-#ifndef CONFIG_RADIO_TYPHOON_MUTEFREQ
-#define CONFIG_RADIO_TYPHOON_MUTEFREQ 0
-#endif
-
-#ifndef CONFIG_PROC_FS
-#undef CONFIG_RADIO_TYPHOON_PROC_FS
-#endif
-
-struct typhoon_device {
-	int users;
-	int iobase;
-	int curvol;
-	int muted;
-	unsigned long curfreq;
-	unsigned long mutefreq;
-};
-
-static void typhoon_setvol_generic(struct typhoon_device *dev, int vol);
-static int typhoon_setfreq_generic(struct typhoon_device *dev,
-				   unsigned long frequency);
-static int typhoon_setfreq(struct typhoon_device *dev, unsigned long frequency);
-static void typhoon_mute(struct typhoon_device *dev);
-static void typhoon_unmute(struct typhoon_device *dev);
-static int typhoon_setvol(struct typhoon_device *dev, int vol);
-static int typhoon_ioctl(struct video_device *dev, unsigned int cmd, void *arg);
-static int typhoon_open(struct video_device *dev, int flags);
-static void typhoon_close(struct video_device *dev);
-#ifdef CONFIG_RADIO_TYPHOON_PROC_FS
-static int typhoon_get_info(char *buf, char **start, off_t offset, int len);
-#endif
-
-static void typhoon_setvol_generic(struct typhoon_device *dev, int vol)
-{
-	vol >>= 14;				/* Map 16 bit to 2 bit */
-	vol &= 3;
-	outb_p(vol / 2, dev->iobase);		/* Set the volume, high bit. */
-	outb_p(vol % 2, dev->iobase + 2);	/* Set the volume, low bit. */
-}
-
-static int typhoon_setfreq_generic(struct typhoon_device *dev,
-				   unsigned long frequency)
-{
-	unsigned long outval;
-	unsigned long x;
-
-	/*
-	 * The frequency transfer curve is not linear. The best fit I could
-	 * get is
-	 *
-	 * outval = -155 + exp((f + 15.55) * 0.057))
-	 *
-	 * where frequency f is in MHz. Since we don't have exp in the kernel,
-	 * I approximate this function by a third order polynomial.
-	 *
-	 */
-
-	x = frequency / 160;
-	outval = (x * x + 2500) / 5000;
-	outval = (outval * x + 5000) / 10000;
-	outval -= (10 * x * x + 10433) / 20866;
-	outval += 4 * x - 11505;
-
-	outb_p((outval >> 8) & 0x01, dev->iobase + 4);
-	outb_p(outval >> 9, dev->iobase + 6);
-	outb_p(outval & 0xff, dev->iobase + 8);
-
-	return 0;
-}
-
-static int typhoon_setfreq(struct typhoon_device *dev, unsigned long frequency)
-{
-	typhoon_setfreq_generic(dev, frequency);
-	dev->curfreq = frequency;
-	return 0;
-}
-
-static void typhoon_mute(struct typhoon_device *dev)
-{
-	if (dev->muted == 1)
-		return;
-	typhoon_setvol_generic(dev, 0);
-	typhoon_setfreq_generic(dev, dev->mutefreq);
-	dev->muted = 1;
-}
-
-static void typhoon_unmute(struct typhoon_device *dev)
-{
-	if (dev->muted == 0)
-		return;
-	typhoon_setfreq_generic(dev, dev->curfreq);
-	typhoon_setvol_generic(dev, dev->curvol);
-	dev->muted = 0;
-}
-
-static int typhoon_setvol(struct typhoon_device *dev, int vol)
-{
-	if (dev->muted && vol != 0) {	/* user is unmuting the card */
-		dev->curvol = vol;
-		typhoon_unmute(dev);
-		return 0;
-	}
-	if (vol == dev->curvol)		/* requested volume == current */
-		return 0;
-
-	if (vol == 0) {			/* volume == 0 means mute the card */
-		typhoon_mute(dev);
-		dev->curvol = vol;
-		return 0;
-	}
-	typhoon_setvol_generic(dev, vol);
-	dev->curvol = vol;
-	return 0;
-}
-
-
-static int typhoon_ioctl(struct video_device *dev, unsigned int cmd, void *arg)
-{
-	struct typhoon_device *typhoon = 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;
-			strcpy(v.name, "Typhoon 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)) != 0)
-				return -EFAULT;
-			if (v.tuner)	/* Only 1 tuner */
-				return -EINVAL;
-			v.rangelow = 875 * 1600;
-			v.rangehigh = 1080 * 1600;
-			v.flags = VIDEO_TUNER_LOW;
-			v.mode = VIDEO_MODE_AUTO;
-			v.signal = 0xFFFF;	/* We can't get the signal strength */
-			strcpy(v.name, "FM");
-			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, &typhoon->curfreq,
-				 sizeof(typhoon->curfreq)))
-			return -EFAULT;
-		return 0;
-	case VIDIOCSFREQ:
-		if (copy_from_user(&typhoon->curfreq, arg,
-				   sizeof(typhoon->curfreq)))
-			return -EFAULT;
-		typhoon_setfreq(typhoon, typhoon->curfreq);
-		return 0;
-	case VIDIOCGAUDIO:
-		{
-			struct video_audio v;
-			memset(&v, 0, sizeof(v));
-			v.flags |= VIDEO_AUDIO_MUTABLE | VIDEO_AUDIO_VOLUME;
-			v.mode |= VIDEO_SOUND_MONO;
-			v.volume = typhoon->curvol;
-			v.step = 1 << 14;
-			strcpy(v.name, "Typhoon 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)
-				typhoon_mute(typhoon);
-			else
-				typhoon_unmute(typhoon);
-
-			if (v.flags & VIDEO_AUDIO_VOLUME)
-				typhoon_setvol(typhoon, v.volume);
-
-			return 0;
-		}
-	default:
-		return -ENOIOCTLCMD;
-	}
-}
-
-static int typhoon_open(struct video_device *dev, int flags)
-{
-	struct typhoon_device *typhoon = dev->priv;
-	if (typhoon->users)
-		return -EBUSY;
-	typhoon->users++;
-	MOD_INC_USE_COUNT;
-	return 0;
-}
-
-static void typhoon_close(struct video_device *dev)
-{
-	struct typhoon_device *typhoon = dev->priv;
-	typhoon->users--;
-	MOD_DEC_USE_COUNT;
-}
-
-static struct typhoon_device typhoon_unit =
-{
-	0,				/* users */
-	CONFIG_RADIO_TYPHOON_PORT,	/* iobase */
-	0,				/* curvol */
-	0,				/* muted */
-	CONFIG_RADIO_TYPHOON_MUTEFREQ,	/* curfreq */
-	CONFIG_RADIO_TYPHOON_MUTEFREQ	/* mutefreq */
-};
-
-static struct video_device typhoon_radio =
-{
-	"Typhoon Radio",
-	VID_TYPE_TUNER,
-	VID_HARDWARE_TYPHOON,
-	typhoon_open,
-	typhoon_close,
-	NULL,			/* Can't read  (no capture ability) */
-	NULL,			/* Can't write */
-	NULL,			/* Can't poll */
-	typhoon_ioctl,
-	NULL,
-	NULL
-};
-
-#ifdef CONFIG_RADIO_TYPHOON_PROC_FS
-
-static int typhoon_get_info(char *buf, char **start, off_t offset, int len)
-{
-	char *out = buf;
-
-	#ifdef MODULE
-	    #define MODULEPROCSTRING "Driver loaded as a module"
-	#else
-	    #define MODULEPROCSTRING "Driver compiled into kernel"
-	#endif
-
-	/* output must be kept under PAGE_SIZE */
-	out += sprintf(out, BANNER);
-	out += sprintf(out, "Load type: " MODULEPROCSTRING "\n\n");
-	out += sprintf(out, "frequency = %lu kHz\n",
-		typhoon_unit.curfreq >> 4);
-	out += sprintf(out, "volume = %d\n", typhoon_unit.curvol);
-	out += sprintf(out, "mute = %s\n", typhoon_unit.muted ?
-		"on" : "off");
-	out += sprintf(out, "iobase = 0x%x\n", typhoon_unit.iobase);
-	out += sprintf(out, "mute frequency = %lu kHz\n",
-		typhoon_unit.mutefreq >> 4);
-	return out - buf;
-}
-
-#endif /* CONFIG_RADIO_TYPHOON_PROC_FS */
-
-MODULE_AUTHOR("Dr. Henrik Seidel");
-MODULE_DESCRIPTION("A driver for the Typhoon radio card (a.k.a. EcoRadio).");
-MODULE_PARM(io, "i");
-MODULE_PARM_DESC(io, "I/O address of the Typhoon card (0x316 or 0x336)");
-MODULE_PARM(mutefreq, "i");
-MODULE_PARM_DESC(mutefreq, "Frequency used when muting the card (in kHz)");
-
-EXPORT_NO_SYMBOLS;
-
-static int io = -1;
-
-#ifdef MODULE
-static unsigned long mutefreq = 0;
-#endif
-
-static int __init typhoon_init(void)
-{
-#ifdef MODULE
-	if (io == -1) {
-		printk(KERN_ERR "radio-typhoon: You must set an I/O address with io=0x316 or io=0x336\n");
-		return -EINVAL;
-	}
-	typhoon_unit.iobase = io;
-
-	if (mutefreq < 87000 || mutefreq > 108500) {
-		printk(KERN_ERR "radio-typhoon: You must set a frequency (in kHz) used when muting the card,\n");
-		printk(KERN_ERR "radio-typhoon: e.g. with \"mutefreq=87500\" (87000 <= mutefreq <= 108500)\n");
-		return -EINVAL;
-	}
-	typhoon_unit.mutefreq = mutefreq;
-#endif /* MODULE */
-
-	printk(KERN_INFO BANNER);
-	io = typhoon_unit.iobase;
-	if (check_region(io, 8)) {
-		printk(KERN_ERR "radio-typhoon: port 0x%x already in use\n",
-		       typhoon_unit.iobase);
-		return -EBUSY;
-	}
-
-	typhoon_radio.priv = &typhoon_unit;
-	if (video_register_device(&typhoon_radio, VFL_TYPE_RADIO) == -1)
-		return -EINVAL;
-
-	request_region(typhoon_unit.iobase, 8, "typhoon");
-	printk(KERN_INFO "radio-typhoon: port 0x%x.\n", typhoon_unit.iobase);
-	printk(KERN_INFO "radio-typhoon: mute frequency is %lu kHz.\n",
-	       typhoon_unit.mutefreq);
-	typhoon_unit.mutefreq <<= 4;
-
-	/* mute card - prevents noisy bootups */
-	typhoon_mute(&typhoon_unit);
-
-#ifdef CONFIG_RADIO_TYPHOON_PROC_FS
-	if (!create_proc_info_entry("driver/radio-typhoon", 0, NULL,
-				    typhoon_get_info)) 
-	    	printk(KERN_ERR "radio-typhoon: registering /proc/driver/radio-typhoon failed\n");
-#endif
-
-	return 0;
-}
-
-static void __exit typhoon_cleanup_module(void)
-{
-
-#ifdef CONFIG_RADIO_TYPHOON_PROC_FS
-	remove_proc_entry("driver/radio-typhoon", NULL);
-#endif
-
-	video_unregister_device(&typhoon_radio);
-	release_region(io, 8);
-}
-
-module_init(typhoon_init);
-module_exit(typhoon_cleanup_module);
-