Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 367 insertions, 0 deletions

diff --git a/drivers/media/video/tvmixer.c b/drivers/media/video/tvmixer.c
new file mode 100644
index 000000000000..eafd7061b310
--- /dev/null
+++ b/drivers/media/video/tvmixer.c
@@ -0,0 +1,367 @@
+#include <linux/module.h>
+#include <linux/moduleparam.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/slab.h>
+#include <linux/i2c.h>
+#include <linux/videodev.h>
+#include <linux/init.h>
+#include <linux/kdev_t.h>
+#include <linux/sound.h>
+#include <linux/soundcard.h>
+
+#include <asm/semaphore.h>
+#include <asm/uaccess.h>
+
+
+#define DEV_MAX  4
+
+static int devnr = -1;
+module_param(devnr, int, 0644);
+
+MODULE_AUTHOR("Gerd Knorr");
+MODULE_LICENSE("GPL");
+
+/* ----------------------------------------------------------------------- */
+
+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 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;
+	void __user *argp = (void __user *)arg;
+	int __user *p = argp;
+
+	if (NULL == client)
+		return -ENODEV;
+
+        if (cmd == SOUND_MIXER_INFO) {
+                mixer_info info;
+                strlcpy(info.id, "tv card", sizeof(info.id));
+                strlcpy(info.name, i2c_clientname(client), sizeof(info.name));
+                info.modify_counter = 42 /* FIXME */;
+                if (copy_to_user(argp, &info, sizeof(info)))
+                        return -EFAULT;
+                return 0;
+        }
+        if (cmd == SOUND_OLD_MIXER_INFO) {
+                _old_mixer_info info;
+                strlcpy(info.id, "tv card", sizeof(info.id));
+                strlcpy(info.name, i2c_clientname(client), sizeof(info.name));
+                if (copy_to_user(argp, &info, sizeof(info)))
+                        return -EFAULT;
+                return 0;
+        }
+        if (cmd == OSS_GETVERSION)
+                return put_user(SOUND_VERSION, p);
+
+	if (_SIOC_DIR(cmd) & _SIOC_WRITE)
+		if (get_user(val, p))
+			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;
+		if (va.volume)
+			va.flags &= ~VIDEO_AUDIO_MUTE;
+		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,(u16)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, p))
+		return -EFAULT;
+	return 0;
+}
+
+static int tvmixer_open(struct inode *inode, struct file *file)
+{
+        int i, minor = iminor(inode);
+        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;
+#ifndef I2C_PEC
+	if (client->adapter->inc_use)
+		client->adapter->inc_use(client->adapter);
+#endif
+	if (client->adapter->owner)
+		try_module_get(client->adapter->owner);
+        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;
+	}
+
+#ifndef I2C_PEC
+	if (client->adapter->dec_use)
+		client->adapter->dec_use(client->adapter);
+#endif
+	if (client->adapter->owner)
+		module_put(client->adapter->owner);
+	return 0;
+}
+
+static struct i2c_driver driver = {
+#ifdef I2C_PEC
+	.owner           = THIS_MODULE,
+#endif
+	.name            = "tv card mixer driver",
+        .id              = I2C_DRIVERID_TVMIXER,
+#ifdef I2C_DF_DUMMY
+	.flags           = I2C_DF_DUMMY,
+#else
+	.flags           = I2C_DF_NOTIFY,
+        .detach_adapter  = tvmixer_adapters,
+#endif
+        .attach_adapter  = tvmixer_adapters,
+        .detach_client   = tvmixer_clients,
+};
+
+static struct file_operations tvmixer_fops = {
+	.owner		= THIS_MODULE,
+	.llseek         = no_llseek,
+	.ioctl          = tvmixer_ioctl,
+	.open           = tvmixer_open,
+	.release        = tvmixer_release,
+};
+
+/* ----------------------------------------------------------------------- */
+
+static int tvmixer_adapters(struct i2c_adapter *adap)
+{
+	struct list_head  *item;
+	struct i2c_client *client;
+
+	list_for_each(item,&adap->clients) {
+		client = list_entry(item, struct i2c_client, list);
+		tvmixer_clients(client);
+	}
+	return 0;
+}
+
+static int tvmixer_clients(struct i2c_client *client)
+{
+	struct video_audio va;
+	int i,minor;
+
+#ifdef I2C_CLASS_TV_ANALOG
+	if (!(client->adapter->class & I2C_CLASS_TV_ANALOG))
+		return -1;
+#else
+	/* TV card ??? */
+	switch (client->adapter->id) {
+	case I2C_ALGO_BIT | I2C_HW_SMBUS_VOODOO3:
+	case I2C_ALGO_BIT | I2C_HW_B_BT848:
+	case I2C_ALGO_BIT | I2C_HW_B_RIVA:
+		/* ok, have a look ... */
+		break;
+	default:
+		/* ignore that one */
+		return -1;
+	}
+#endif
+
+	/* 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",
+			       i2c_clientname(client));
+			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)
+		return -1;
+	memset(&va,0,sizeof(va));
+	if (0 != client->driver->command(client,VIDIOCGAUDIO,&va))
+		return -1;
+	if (0 == (va.flags & VIDEO_AUDIO_VOLUME))
+		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;
+}
+
+/* ----------------------------------------------------------------------- */
+
+static int __init tvmixer_init_module(void)
+{
+	int i;
+
+	for (i = 0; i < DEV_MAX; i++)
+		devices[i].minor = -1;
+
+	return i2c_add_driver(&driver);
+}
+
+static void __exit 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",
+			       i2c_clientname(devices[i].dev));
+		}
+	}
+}
+
+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:
+ */