patch-2.4.0-test7 linux/drivers/char/tvmixer.c

• Lines: 354
• Date: Wed Dec 31 16:00:00 1969
• Orig file: v2.4.0-test6/linux/drivers/char/tvmixer.c
• Orig date: Thu Jul 27 17:38:00 2000

diff -u --recursive --new-file v2.4.0-test6/linux/drivers/char/tvmixer.c linux/drivers/char/tvmixer.c
@@ -1,353 +0,0 @@
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/sched.h>
-#include <linux/string.h>
-#include <linux/timer.h>
-#include <linux/delay.h>
-#include <linux/errno.h>
-#include <linux/malloc.h>
-#include <linux/i2c.h>
-#include <linux/videodev.h>
-#include <asm/semaphore.h>
-#include <linux/init.h>
-
-#include <linux/sound.h>
-#include <linux/soundcard.h>
-#include <asm/uaccess.h>
-
-#include "audiochip.h"
-
-#define DEV_MAX  4
-
-static int debug = 0;
-static int devnr = -1;
-
-MODULE_PARM(debug,"i");
-MODULE_PARM(devnr,"i");
-
-/* ----------------------------------------------------------------------- */
-
-struct TVMIXER {
-	struct i2c_client *dev;
-	int minor;
-	int count;
-};
-
-static struct TVMIXER devices[DEV_MAX];
-
-static int tvmixer_adapters(struct i2c_adapter *adap);
-static int tvmixer_clients(struct i2c_client *client);
-
-static int tvmixer_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg);
-static int tvmixer_open(struct inode *inode, struct file *file);
-static int tvmixer_release(struct inode *inode, struct file *file);
-static loff_t tvmixer_llseek(struct file *file, loff_t offset, int origin);
-
-
-static struct i2c_driver driver = {
-	"tv card mixer driver",
-        42 /* I2C_DRIVERID_FIXME */,
-	I2C_DF_DUMMY,
-        tvmixer_adapters,
-        tvmixer_clients,
-};
-
-static struct file_operations tvmixer_fops = {
-	owner:		THIS_MODULE,
-	llseek:         tvmixer_llseek,
-	ioctl:          tvmixer_ioctl,
-	open:           tvmixer_open,
-	release:        tvmixer_release,
-};
-
-/* ----------------------------------------------------------------------- */
-
-static int mix_to_v4l(int i)
-{
-	int r;
-
-	r = ((i & 0xff) * 65536 + 50) / 100;
-	if (r > 65535) r = 65535;
-	if (r <     0) r =     0;
-	return r;
-}
-
-static int v4l_to_mix(int i)
-{
-	int r;
-
-	r = (i * 100 + 32768) / 65536;
-	if (r > 100) r = 100;
-	if (r <   0) r =   0;
-	return r | (r << 8);
-}
-
-static int v4l_to_mix2(int l, int r)
-{
-	r = (r * 100 + 32768) / 65536;
-	if (r > 100) r = 100;
-	if (r <   0) r =   0;
-	l = (l * 100 + 32768) / 65536;
-	if (l > 100) l = 100;
-	if (l <   0) l =   0;
-	return (r << 8) | l;
-}
-
-static int tvmixer_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
-{
-	struct video_audio va;
-	int left,right,ret,val = 0;
-        struct TVMIXER *mix = file->private_data;
-	struct i2c_client *client = mix->dev;
-
-	if (NULL == client)
-		return -ENODEV;
-	
-        if (cmd == SOUND_MIXER_INFO) {
-                mixer_info info;
-                strncpy(info.id, "tv card", sizeof(info.id));
-                strncpy(info.name, client->name, sizeof(info.name));
-                info.modify_counter = 42 /* FIXME */;
-                if (copy_to_user((void *)arg, &info, sizeof(info)))
-                        return -EFAULT;
-                return 0;
-        }
-        if (cmd == SOUND_OLD_MIXER_INFO) {
-                _old_mixer_info info;
-                strncpy(info.id, "tv card", sizeof(info.id));
-                strncpy(info.name, client->name, sizeof(info.name));
-                if (copy_to_user((void *)arg, &info, sizeof(info)))
-                        return -EFAULT;
-                return 0;
-        }
-        if (cmd == OSS_GETVERSION)
-                return put_user(SOUND_VERSION, (int *)arg);
-
-	if (_SIOC_DIR(cmd) & _SIOC_WRITE)
-		if (get_user(val, (int *)arg))
-			return -EFAULT;
-
-	/* read state */
-	memset(&va,0,sizeof(va));
-	client->driver->command(client,VIDIOCGAUDIO,&va);
-
-	switch (cmd) {
-	case MIXER_READ(SOUND_MIXER_RECMASK):
-	case MIXER_READ(SOUND_MIXER_CAPS):
-	case MIXER_READ(SOUND_MIXER_RECSRC):
-	case MIXER_WRITE(SOUND_MIXER_RECSRC):
-		ret = 0;
-		break;
-
-	case MIXER_READ(SOUND_MIXER_STEREODEVS):
-		ret = SOUND_MASK_VOLUME;
-		break;
-	case MIXER_READ(SOUND_MIXER_DEVMASK):
-		ret = SOUND_MASK_VOLUME;
-		if (va.flags & VIDEO_AUDIO_BASS)
-			ret |= SOUND_MASK_BASS;
-		if (va.flags & VIDEO_AUDIO_TREBLE)
-			ret |= SOUND_MASK_TREBLE;
-		break;
-
-	case MIXER_WRITE(SOUND_MIXER_VOLUME):
-		left  = mix_to_v4l(val);
-		right = mix_to_v4l(val >> 8);
-		va.volume  = MAX(left,right);
-		va.balance = (32768*MIN(left,right)) / (va.volume ? va.volume : 1);
-		va.balance = (left<right) ? (65535-va.balance) : va.balance;
-		client->driver->command(client,VIDIOCSAUDIO,&va);
-		client->driver->command(client,VIDIOCGAUDIO,&va);
-		/* fall throuth */
-	case MIXER_READ(SOUND_MIXER_VOLUME):
-		left  = (MIN(65536 - va.balance,32768) *
-			 va.volume) / 32768;
-		right = (MIN(va.balance,32768) *
-			 va.volume) / 32768;
-		ret = v4l_to_mix2(left,right);
-		break;
-		
-	case MIXER_WRITE(SOUND_MIXER_BASS):
-		va.bass = mix_to_v4l(val);
-		client->driver->command(client,VIDIOCSAUDIO,&va);
-		client->driver->command(client,VIDIOCGAUDIO,&va);
-		/* fall throuth  */
-	case MIXER_READ(SOUND_MIXER_BASS):
-		ret = v4l_to_mix(va.bass);
-		break;
-
-	case MIXER_WRITE(SOUND_MIXER_TREBLE):
-		va.treble = mix_to_v4l(val);
-		client->driver->command(client,VIDIOCSAUDIO,&va);
-		client->driver->command(client,VIDIOCGAUDIO,&va);
-		/* fall throuth */
-	case MIXER_READ(SOUND_MIXER_TREBLE):
-		ret = v4l_to_mix(va.treble);
-		break;
-
-	default:
-		return -EINVAL;
-	}
-	if (put_user(ret, (int *)arg))
-		return -EFAULT;
-	return 0;
-}
-
-static int tvmixer_open(struct inode *inode, struct file *file)
-{
-        int i, minor = MINOR(inode->i_rdev);
-        struct TVMIXER *mix = NULL;
-	struct i2c_client *client = NULL;
-
-	for (i = 0; i < DEV_MAX; i++) {
-		if (devices[i].minor == minor) {
-			mix = devices+i;
-			client = mix->dev;
-			break;
-		}
-	}
-
-	if (NULL == client)
-		return -ENODEV;
-
-	/* lock bttv in memory while the mixer is in use  */
-	file->private_data = mix;
-	if (client->adapter->inc_use)
-		client->adapter->inc_use(client->adapter);
-        return 0;
-}
-
-static int tvmixer_release(struct inode *inode, struct file *file)
-{
-	struct TVMIXER *mix = file->private_data;
-	struct i2c_client *client;
-
-	client = mix->dev;
-	if (NULL == client) {
-		return -ENODEV;
-	}
-
-	if (client->adapter->dec_use)
-		client->adapter->dec_use(client->adapter);
-	return 0;
-}
-
-static loff_t tvmixer_llseek(struct file *file, loff_t offset, int origin)
-{
-        return -ESPIPE;
-}
-
-/* ----------------------------------------------------------------------- */
-
-static int tvmixer_adapters(struct i2c_adapter *adap)
-{
-	return 0;
-}
-
-static int tvmixer_clients(struct i2c_client *client)
-{
-	struct video_audio va;
-	int i,minor;
-
-	/* TV card ??? */
-	if (client->adapter->id != (I2C_ALGO_BIT | I2C_HW_B_BT848)) {
-		if (debug)
-			printk("tvmixer: %s is not a tv card\n",
-			       client->adapter->name);
-		return -1;
-	}
-	printk("tvmixer: debug: %s\n",client->name);
-
-	/* unregister ?? */
-	for (i = 0; i < DEV_MAX; i++) {
-		if (devices[i].dev == client) {
-			/* unregister */
-			unregister_sound_mixer(devices[i].minor);
-			devices[i].dev = NULL;
-			devices[i].minor = -1;
-			printk("tvmixer: %s unregistered (#1)\n",client->name);
-			return 0;
-		}
-	}
-
-	/* look for a free slot */
-	for (i = 0; i < DEV_MAX; i++)
-		if (NULL == devices[i].dev)
-			break;
-	if (i == DEV_MAX) {
-		printk(KERN_WARNING "tvmixer: DEV_MAX too small\n");
-		return -1;
-	}
-
-	/* audio chip with mixer ??? */
-	if (NULL == client->driver->command) {
-		if (debug)
-			printk("tvmixer: %s: driver->command is NULL\n",
-			       client->driver->name);
-		return -1;
-	}
-	memset(&va,0,sizeof(va));
-	if (0 != client->driver->command(client,VIDIOCGAUDIO,&va)) {
-		if (debug)
-			printk("tvmixer: %s: VIDIOCGAUDIO failed\n",
-			       client->name);
-		return -1;
-	}
-	if (0 == (va.flags & VIDEO_AUDIO_VOLUME)) {
-		if (debug)
-			printk("tvmixer: %s: has no volume control\n",
-			       client->name);
-		return -1;
-	}
-
-	/* everything is fine, register */
-	if ((minor = register_sound_mixer(&tvmixer_fops,devnr)) < 0) {
-		printk(KERN_ERR "tvmixer: cannot allocate mixer device\n");
-		return -1;
-	}
-
-	devices[i].minor = minor;
-	devices[i].count = 0;
-	devices[i].dev   = client;
-	printk("tvmixer: %s (%s) registered with minor %d\n",
-	       client->name,client->adapter->name,minor);
-	
-	return 0;
-}
-
-/* ----------------------------------------------------------------------- */
-
-int tvmixer_init_module(void)
-{
-	int i;
-	
-	for (i = 0; i < DEV_MAX; i++)
-		devices[i].minor = -1;
-	i2c_add_driver(&driver);
-	return 0;
-}
-
-void tvmixer_cleanup_module(void)
-{
-	int i;
-	
-	i2c_del_driver(&driver);
-	for (i = 0; i < DEV_MAX; i++) {
-		if (devices[i].minor != -1) {
-			unregister_sound_mixer(devices[i].minor);
-			printk("tvmixer: %s unregistered (#2)\n",
-			       devices[i].dev->name);
-		}
-	}
-}
-
-module_init(tvmixer_init_module);
-module_exit(tvmixer_cleanup_module);
-
-/*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-basic-offset: 8
- * End:
- */