patch-2.1.110 linux/drivers/char/radio.c

• Lines: 235
• Date: Wed Dec 31 16:00:00 1969
• Orig file: v2.1.109/linux/drivers/char/radio.c
• Orig date: Tue Nov 4 10:23:25 1997

diff -u --recursive --new-file v2.1.109/linux/drivers/char/radio.c linux/drivers/char/radio.c
@@ -1,234 +0,0 @@
-/*
- * Radio Card Device Driver for Linux
- *
- * (c) 1997 Matthew Kirkwood <weejock@ferret.lmh.ox.ac.uk>
- *
- */
-
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/sched.h>
-#include <linux/errno.h>
-#include <linux/fs.h>
-
-#include <linux/miscdevice.h>
-
-#include <asm/uaccess.h>
-
-#include <linux/config.h>
-
-#include <linux/radio.h>
-#ifdef CONFIG_RADIO_RTRACK
-#include "rtrack.h"
-#endif
-#ifdef CONFIG_RADIO_WINRADIO
-#include "winradio.h"
-#endif
-
-int radio_open(struct inode *inode, struct file *file);
-int radio_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg);
-
-/* /dev/radio interface */
-static struct file_operations radio_fops = {
-	NULL,			/* seek */
-	NULL,			/* read */
-	NULL,			/* write */
-	NULL,			/* readdir */
-	NULL,			/* select */
-	&radio_ioctl,		/* ioctl */
-	NULL,			/* mmap */
-	&radio_open,		/* we're not allowed NULL, it seems... */
-	NULL			/* release */
-};
-
-static struct miscdevice radio_miscdevice = {
-	RADIO_MINOR,		/* minor device number */
-	"radio",		/* title */
-	&radio_fops,		/* file operations */
-	NULL, NULL		/* previous and next (not our business) */
-};
-
-
-static struct radio_device *firstdevice, *lastdevice;
-static int numdevices;
-
-__initfunc(void radio_init(void))
-{
-	/* register the handler for the device number... */
-	if(misc_register(&radio_miscdevice)) {
-		printk("radio: couldn't register misc device\n");
-		return;
-	}
-
-	/* do some general initialisation stuff */
-	lastdevice = firstdevice = NULL;
-	numdevices = 0;
-
-#ifdef	CONFIG_RADIO_RTRACK
-	radiotrack_init();
-#endif
-#ifdef	CONFIG_RADIO_WINRADIO
-	printk("oooops.  no winradio support yet... :-(\n");
-#endif
-/* etc.... */
-
-	printk("radio: registered %d devices\n", numdevices);
-}
-
-
-/* according to drivers/char/misc.c, the "open" call must not be NULL.
- * I'm not sure if I approve, but I didn't write it, so...
- */
-int radio_open(struct inode *inode, struct file *file)
-{
-	return 0;
-}
-
-
-/* append a device to the linked list... */
-int radio_add_device(struct radio_device *newdev)
-{
-	if(firstdevice == NULL) {
-		firstdevice = newdev;
-	} else {
-		lastdevice->next = newdev;
-	}
-	lastdevice = newdev; numdevices++;
-	newdev->cap->dev_num=numdevices;
-	newdev->next = NULL;			/* don't need, but... */
-	return(numdevices);
-}
-
-struct radio_device *getdev(int index)
-{
-struct radio_device *retval;
-
-	if(index > numdevices)
-		return NULL;		/* let's have a bit less of that */
-
-	retval = firstdevice;
-	for(;index;index--)
-		retval = retval->next;
-
-	return retval;
-}
-
-
-/* interface routine */
-int radio_ioctl(struct inode *inode, struct file *file,
-		unsigned int cmd, unsigned long arg)
-{
-struct radio_device *dev;
-struct radio_ctl *ctl_arg = (struct radio_ctl*)arg;
-int nowrite;
-int val, ret;
-
-	if((void*)arg == NULL)
-		return -EFAULT;		/* XXX - check errnos are OK */
-
-
-	switch(cmd) {
-	case RADIO_NUMDEVS:
-		return (put_user(numdevices,(int*)arg) ? -EFAULT : 0);
-
-
-	case RADIO_GETCAPS:
-	/* p'raps I should verify for read then write ?? */
-		if(verify_area(VERIFY_WRITE, (void*)arg, sizeof(struct radio_cap)))
-			return -EFAULT;
-		if((dev = getdev(((struct radio_cap*)arg)->dev_num)) == NULL)
-			return -EINVAL;
-		copy_to_user((void*)arg, dev->cap, sizeof(struct radio_cap));
-		return 0;
-
-
-	case RADIO_GETBNDCAP:
-		if(verify_area(VERIFY_WRITE, (void*)arg, sizeof(struct radio_band)))
-			return -EFAULT;
-
-		if((dev = getdev(((struct radio_band*)arg)->dev_num)) == NULL)
-			return -EINVAL;
-
-		val = ((struct radio_band*)arg)->index;
-		if(val >= dev->cap->num_bwidths)
-			return -EINVAL;			/* XXX errno */
-
-		copy_to_user((void*)arg, (dev->bands)+(val*sizeof(struct radio_band)),
-			sizeof(struct radio_band));
-		return 0;
-	}
-
-
-/* now, we know that arg points to a struct radio_ctl */
-	/* get the requested device */
-	if(verify_area(VERIFY_READ, ctl_arg, sizeof(struct radio_ctl)))
-		return -EFAULT;
-
-	if((dev = getdev(ctl_arg->dev_num)) == NULL)
-		return -EINVAL;
-
-	nowrite = verify_area(VERIFY_WRITE, ctl_arg, sizeof(struct radio_ctl));
-
-	val = ctl_arg->value;
-
-	switch(cmd) {
-	case RADIO_SETVOL:
-		if((val < dev->cap->volmin) || (val > dev->cap->volmax))
-			return -EINVAL;
-		if((ret = (*(dev->setvol))(dev, val)))
-			return ret;
-		dev->curvol = val;
-		return 0;
-
-	case RADIO_GETVOL:
-		if(nowrite)
-			return -EFAULT;
-		ctl_arg->value = dev->curvol;
-		return 0;
-
-
-	case RADIO_SETBAND:
-		if(val >= dev->cap->num_bwidths)
-			return -EINVAL;
-		if((ret = (*(dev->setband))(dev, val)))
-			return ret;
-		dev->curband = val;
-		return 0;
-
-	case RADIO_GETBAND:
-		if(nowrite)
-			return -EFAULT;
-		ctl_arg->value = dev->curband;
-		return 0;
-
-
-	case RADIO_SETFREQ: {
-	struct radio_band *bp;
-
-		bp = (dev->bands) + ((dev->curband) * sizeof(struct radio_band));
-		if((val < bp->freqmin) || (val > bp->freqmax))
-			return -EINVAL;
-		if((ret = (*(dev->setfreq))(dev, val)))
-			return ret;
-		dev->curfreq = val;
-		return 0;
-	}
-
-	case RADIO_GETFREQ:
-		if(nowrite)
-			return -EFAULT;
-		ctl_arg->value = dev->curfreq;
-		return 0;
-
-
-	case RADIO_GETSIGSTR:
-		if(nowrite)
-			return -EFAULT;
-		ctl_arg->value = (*(dev->getsigstr))(dev);
-		return 0;
-
-
-	default:
-		return -ENOSYS;
-	}
-}