drivers/media/video/tda9875.c - android_kernel_htc_msm8960 - Gitiles

 /*
  * For the TDA9875 chip
  * (The TDA9875 is used on the Diamond DTV2000 french version
  * Other cards probably use these chips as well.)
  * This driver will not complain if used with any
  * other i2c device with the same address.
  *
  * Copyright (c) 2000 Guillaume Delvit based on Gerd Knorr source and
  * Eric Sandeen
  * This code is placed under the terms of the GNU General Public License
  * Based on tda9855.c by Steve VanDeBogart (vandebo@uclink.berkeley.edu)
  * Which was based on tda8425.c by Greg Alexander (c) 1998
  *
  * OPTIONS:
  * debug   - set to 1 if you'd like to see debug messages
  *
  *  Revision: 0.1 - original version
  */

 #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/slab.h>
 #include <linux/videodev.h>
 #include <linux/i2c.h>
 #include <linux/i2c-algo-bit.h>
 #include <linux/init.h>

 #include "bttv.h"
 #include <media/audiochip.h>

 static int debug; /* insmod parameter */
 module_param(debug, int, S_IRUGO | S_IWUSR);
 MODULE_LICENSE("GPL");


 /* Addresses to scan */
 static unsigned short normal_i2c[] =  {
     I2C_TDA9875 >> 1,
     I2C_CLIENT_END
 };
 I2C_CLIENT_INSMOD;

 /* This is a superset of the TDA9875 */
 struct tda9875 {
 	int mode;
 	int rvol, lvol;
 	int bass, treble;
 	struct i2c_client c;
 };

 static struct i2c_driver driver;
 static struct i2c_client client_template;

 #define dprintk  if (debug) printk

 /* The TDA9875 is made by Philips Semiconductor
  * http://www.semiconductors.philips.com
  * TDA9875: I2C-bus controlled DSP audio processor, FM demodulator
  *
  */

 		/* subaddresses for TDA9875 */
 #define TDA9875_MUT         0x12  /*General mute  (value --> 0b11001100*/
 #define TDA9875_CFG         0x01  /* Config register (value --> 0b00000000 */
 #define TDA9875_DACOS       0x13  /*DAC i/o select (ADC) 0b0000100*/
 #define TDA9875_LOSR        0x16  /*Line output select regirter 0b0100 0001*/

 #define TDA9875_CH1V        0x0c  /*Channel 1 volume (mute)*/
 #define TDA9875_CH2V        0x0d  /*Channel 2 volume (mute)*/
 #define TDA9875_SC1         0x14  /*SCART 1 in (mono)*/
 #define TDA9875_SC2         0x15  /*SCART 2 in (mono)*/

 #define TDA9875_ADCIS       0x17  /*ADC input select (mono) 0b0110 000*/
 #define TDA9875_AER         0x19  /*Audio effect (AVL+Pseudo) 0b0000 0110*/
 #define TDA9875_MCS         0x18  /*Main channel select (DAC) 0b0000100*/
 #define TDA9875_MVL         0x1a  /* Main volume gauche */
 #define TDA9875_MVR         0x1b  /* Main volume droite */
 #define TDA9875_MBA         0x1d  /* Main Basse */
 #define TDA9875_MTR         0x1e  /* Main treble */
 #define TDA9875_ACS         0x1f  /* Auxilary channel select (FM) 0b0000000*/
 #define TDA9875_AVL         0x20  /* Auxilary volume gauche */
 #define TDA9875_AVR         0x21  /* Auxilary volume droite */
 #define TDA9875_ABA         0x22  /* Auxilary Basse */
 #define TDA9875_ATR         0x23  /* Auxilary treble */

 #define TDA9875_MSR         0x02  /* Monitor select register */
 #define TDA9875_C1MSB       0x03  /* Carrier 1 (FM) frequency register MSB */
 #define TDA9875_C1MIB       0x04  /* Carrier 1 (FM) frequency register (16-8]b */
 #define TDA9875_C1LSB       0x05  /* Carrier 1 (FM) frequency register LSB */
 #define TDA9875_C2MSB       0x06  /* Carrier 2 (nicam) frequency register MSB */
 #define TDA9875_C2MIB       0x07  /* Carrier 2 (nicam) frequency register (16-8]b */
 #define TDA9875_C2LSB       0x08  /* Carrier 2 (nicam) frequency register LSB */
 #define TDA9875_DCR         0x09  /* Demodulateur configuration regirter*/
 #define TDA9875_DEEM        0x0a  /* FM de-emphasis regirter*/
 #define TDA9875_FMAT        0x0b  /* FM Matrix regirter*/

 /* values */
 #define TDA9875_MUTE_ON	    0xff /* general mute */
 #define TDA9875_MUTE_OFF    0xcc /* general no mute */


 /* Begin code */

 static int tda9875_write(struct i2c_client *client, int subaddr, unsigned char val)
 {
 	unsigned char buffer[2];
 	dprintk("In tda9875_write\n");
 	dprintk("Writing %d 0x%x\n", subaddr, val);
 	buffer[0] = subaddr;
 	buffer[1] = val;
 	if (2 != i2c_master_send(client,buffer,2)) {
 		printk(KERN_WARNING "tda9875: I/O error, trying (write %d 0x%x)\n",
 		       subaddr, val);
 		return -1;
 	}
 	return 0;
 }


 static int i2c_read_register(struct i2c_adapter *adap, int addr, int reg)
 {
 	unsigned char write[1];
 	unsigned char read[1];
 	struct i2c_msg msgs[2] = {
 		{ addr, 0,        1, write },
 		{ addr, I2C_M_RD, 1, read  }
 	};
 	write[0] = reg;

 	if (2 != i2c_transfer(adap,msgs,2)) {
 		printk(KERN_WARNING "tda9875: I/O error (read2)\n");
 		return -1;
 	}
 	dprintk("tda9875: chip_read2: reg%d=0x%x\n",reg,read[0]);
 	return read[0];
 }

 static void tda9875_set(struct i2c_client *client)
 {
 	struct tda9875 *tda = i2c_get_clientdata(client);
 	unsigned char a;

 	dprintk(KERN_DEBUG "tda9875_set(%04x,%04x,%04x,%04x)\n",
 		tda->lvol,tda->rvol,tda->bass,tda->treble);


 	a = tda->lvol & 0xff;
 	tda9875_write(client, TDA9875_MVL, a);
 	a =tda->rvol & 0xff;
 	tda9875_write(client, TDA9875_MVR, a);
 	a =tda->bass & 0xff;
 	tda9875_write(client, TDA9875_MBA, a);
 	a =tda->treble  & 0xff;
 	tda9875_write(client, TDA9875_MTR, a);
 }

 static void do_tda9875_init(struct i2c_client *client)
 {
 	struct tda9875 *t = i2c_get_clientdata(client);
 	dprintk("In tda9875_init\n");
 	tda9875_write(client, TDA9875_CFG, 0xd0 ); /*reg de config 0 (reset)*/
     	tda9875_write(client, TDA9875_MSR, 0x03 );    /* Monitor 0b00000XXX*/
 	tda9875_write(client, TDA9875_C1MSB, 0x00 );  /*Car1(FM) MSB XMHz*/
 	tda9875_write(client, TDA9875_C1MIB, 0x00 );  /*Car1(FM) MIB XMHz*/
 	tda9875_write(client, TDA9875_C1LSB, 0x00 );  /*Car1(FM) LSB XMHz*/
 	tda9875_write(client, TDA9875_C2MSB, 0x00 );  /*Car2(NICAM) MSB XMHz*/
 	tda9875_write(client, TDA9875_C2MIB, 0x00 );  /*Car2(NICAM) MIB XMHz*/
 	tda9875_write(client, TDA9875_C2LSB, 0x00 );  /*Car2(NICAM) LSB XMHz*/
 	tda9875_write(client, TDA9875_DCR, 0x00 );    /*Demod config 0x00*/
 	tda9875_write(client, TDA9875_DEEM, 0x44 );   /*DE-Emph 0b0100 0100*/
 	tda9875_write(client, TDA9875_FMAT, 0x00 );   /*FM Matrix reg 0x00*/
 	tda9875_write(client, TDA9875_SC1, 0x00 );    /* SCART 1 (SC1)*/
 	tda9875_write(client, TDA9875_SC2, 0x01 );    /* SCART 2 (sc2)*/

 	tda9875_write(client, TDA9875_CH1V, 0x10 );  /* Channel volume 1 mute*/
 	tda9875_write(client, TDA9875_CH2V, 0x10 );  /* Channel volume 2 mute */
 	tda9875_write(client, TDA9875_DACOS, 0x02 ); /* sig DAC i/o(in:nicam)*/
 	tda9875_write(client, TDA9875_ADCIS, 0x6f ); /* sig ADC input(in:mono)*/
 	tda9875_write(client, TDA9875_LOSR, 0x00 );  /* line out (in:mono)*/
 	tda9875_write(client, TDA9875_AER, 0x00 );   /*06 Effect (AVL+PSEUDO) */
 	tda9875_write(client, TDA9875_MCS, 0x44 );   /* Main ch select (DAC) */
 	tda9875_write(client, TDA9875_MVL, 0x03 );   /* Vol Main left 10dB */
 	tda9875_write(client, TDA9875_MVR, 0x03 );   /* Vol Main right 10dB*/
 	tda9875_write(client, TDA9875_MBA, 0x00 );   /* Main Bass Main 0dB*/
 	tda9875_write(client, TDA9875_MTR, 0x00 );   /* Main Treble Main 0dB*/
 	tda9875_write(client, TDA9875_ACS, 0x44 );   /* Aux chan select (dac)*/
 	tda9875_write(client, TDA9875_AVL, 0x00 );   /* Vol Aux left 0dB*/
 	tda9875_write(client, TDA9875_AVR, 0x00 );   /* Vol Aux right 0dB*/
 	tda9875_write(client, TDA9875_ABA, 0x00 );   /* Aux Bass Main 0dB*/
 	tda9875_write(client, TDA9875_ATR, 0x00 );   /* Aux Aigus Main 0dB*/

 	tda9875_write(client, TDA9875_MUT, 0xcc );   /* General mute  */

 	t->mode=AUDIO_UNMUTE;
 	t->lvol=t->rvol =0;  	/* 0dB */
 	t->bass=0; 			/* 0dB */
 	t->treble=0;  		/* 0dB */
 	tda9875_set(client);

 }


 /* *********************** *
  * i2c interface functions *
  * *********************** */

 static int tda9875_checkit(struct i2c_adapter *adap, int addr)
 {
 	int dic,rev;

 	dic=i2c_read_register(adap,addr,254);
 	rev=i2c_read_register(adap,addr,255);

 	if(dic==0 || dic==2) { // tda9875 and tda9875A
 		printk("tda9875: TDA9875%s Rev.%d detected at 0x%x\n",
 		dic==0?"":"A", rev,addr<<1);
 		return 1;
 	}
 	printk("tda9875: no such chip at 0x%x (dic=0x%x rev=0x%x)\n",addr<<1,dic,rev);
 	return(0);
 }

 static int tda9875_attach(struct i2c_adapter *adap, int addr, int kind)
 {
 	struct tda9875 *t;
 	struct i2c_client *client;
 	dprintk("In tda9875_attach\n");

 	t = kzalloc(sizeof *t,GFP_KERNEL);
 	if (!t)
 		return -ENOMEM;

 	client = &t->c;
 	memcpy(client,&client_template,sizeof(struct i2c_client));
 	client->adapter = adap;
 	client->addr = addr;
 	i2c_set_clientdata(client, t);

 	if(!tda9875_checkit(adap,addr)) {
 		kfree(t);
 		return 1;
 	}

 	do_tda9875_init(client);
 	printk(KERN_INFO "tda9875: init\n");

 	i2c_attach_client(client);
 	return 0;
 }

 static int tda9875_probe(struct i2c_adapter *adap)
 {
 	if (adap->class & I2C_CLASS_TV_ANALOG)
 		return i2c_probe(adap, &addr_data, tda9875_attach);
 	return 0;
 }

 static int tda9875_detach(struct i2c_client *client)
 {
 	struct tda9875 *t  = i2c_get_clientdata(client);

 	do_tda9875_init(client);
 	i2c_detach_client(client);

 	kfree(t);
 	return 0;
 }

 static int tda9875_command(struct i2c_client *client,
 				unsigned int cmd, void *arg)
 {
 	struct tda9875 *t = i2c_get_clientdata(client);

 	dprintk("In tda9875_command...\n");

 	switch (cmd) {
 	/* --- v4l ioctls --- */
 	/* take care: bttv does userspace copying, we'll get a
 	   kernel pointer here... */
 	case VIDIOCGAUDIO:
 	{
 		struct video_audio *va = arg;
 		int left,right;

 		dprintk("VIDIOCGAUDIO\n");

 		va->flags |= VIDEO_AUDIO_VOLUME |
 			VIDEO_AUDIO_BASS |
 			VIDEO_AUDIO_TREBLE;

 		/* min is -84 max is 24 */
 		left = (t->lvol+84)*606;
 		right = (t->rvol+84)*606;
 		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;
 		va->bass = (t->bass+12)*2427;    /* min -12 max +15 */
 		va->treble = (t->treble+12)*2730;/* min -12 max +12 */
 		va->mode |= VIDEO_SOUND_MONO;

 		break; /* VIDIOCGAUDIO case */
 	}

 	case VIDIOCSAUDIO:
 	{
 		struct video_audio *va = arg;
 		int left,right;

 		dprintk("VIDEOCSAUDIO...\n");
 		left = (min(65536 - va->balance,32768) *
 			va->volume) / 32768;
 		right = (min(va->balance,(__u16)32768) *
 			 va->volume) / 32768;
 		t->lvol = ((left/606)-84) & 0xff;
 		if (t->lvol > 24)
 		 t->lvol = 24;
 		if (t->lvol < -84)
 		 t->lvol = -84 & 0xff;

 		t->rvol = ((right/606)-84) & 0xff;
 		if (t->rvol > 24)
 		 t->rvol = 24;
 		if (t->rvol < -84)
 		 t->rvol = -84 & 0xff;

 		t->bass = ((va->bass/2400)-12) & 0xff;
 		if (t->bass > 15)
 		 t->bass = 15;
 		if (t->bass < -12)
 		 t->bass = -12 & 0xff;

 		t->treble = ((va->treble/2700)-12) & 0xff;
 		if (t->treble > 12)
 		 t->treble = 12;
 		if (t->treble < -12)
 		 t->treble = -12 & 0xff;


 //printk("tda9875 bal:%04x vol:%04x bass:%04x treble:%04x\n",va->balance,va->volume,va->bass,va->treble);


 		tda9875_set(client);

 		break;

 	} /* end of VIDEOCSAUDIO case */

 	default: /* Not VIDEOCGAUDIO or VIDEOCSAUDIO */

 		/* nothing */
 		dprintk("Default\n");

 	} /* end of (cmd) switch */

 	return 0;
 }


 static struct i2c_driver driver = {
 	.driver = {
 		.name   = "tda9875",
 	},
 	.id             = I2C_DRIVERID_TDA9875,
 	.attach_adapter = tda9875_probe,
 	.detach_client  = tda9875_detach,
 	.command        = tda9875_command,
 };

 static struct i2c_client client_template =
 {
 	.name      = "tda9875",
 	.driver    = &driver,
 };

 static int __init tda9875_init(void)
 {
 	return i2c_add_driver(&driver);
 }

 static void __exit tda9875_fini(void)
 {
 	i2c_del_driver(&driver);
 }

 module_init(tda9875_init);
 module_exit(tda9875_fini);

 /*
  * Local variables:
  * c-basic-offset: 8
  * End:
  */
	/*
	* For the TDA9875 chip
	* (The TDA9875 is used on the Diamond DTV2000 french version
	* Other cards probably use these chips as well.)
	* This driver will not complain if used with any
	* other i2c device with the same address.
	*
	* Copyright (c) 2000 Guillaume Delvit based on Gerd Knorr source and
	* Eric Sandeen
	* This code is placed under the terms of the GNU General Public License
	* Based on tda9855.c by Steve VanDeBogart (vandebo@uclink.berkeley.edu)
	* Which was based on tda8425.c by Greg Alexander (c) 1998
	*
	* OPTIONS:
	* debug - set to 1 if you'd like to see debug messages
	*
	* Revision: 0.1 - original version
	*/

	#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/slab.h>
	#include <linux/videodev.h>
	#include <linux/i2c.h>
	#include <linux/i2c-algo-bit.h>
	#include <linux/init.h>

	#include "bttv.h"
	#include <media/audiochip.h>

	static int debug; /* insmod parameter */
	module_param(debug, int, S_IRUGO \| S_IWUSR);
	MODULE_LICENSE("GPL");


	/* Addresses to scan */
	static unsigned short normal_i2c[] = {
	I2C_TDA9875 >> 1,
	I2C_CLIENT_END
	};
	I2C_CLIENT_INSMOD;

	/* This is a superset of the TDA9875 */
	struct tda9875 {
	int mode;
	int rvol, lvol;
	int bass, treble;
	struct i2c_client c;
	};

	static struct i2c_driver driver;
	static struct i2c_client client_template;

	#define dprintk if (debug) printk

	/* The TDA9875 is made by Philips Semiconductor
	* http://www.semiconductors.philips.com
	* TDA9875: I2C-bus controlled DSP audio processor, FM demodulator
	*
	*/

	/* subaddresses for TDA9875 */
	#define TDA9875_MUT 0x12 /General mute (value --> 0b11001100/
	#define TDA9875_CFG 0x01 /* Config register (value --> 0b00000000 */
	#define TDA9875_DACOS 0x13 /DAC i/o select (ADC) 0b0000100/
	#define TDA9875_LOSR 0x16 /Line output select regirter 0b0100 0001/

	#define TDA9875_CH1V 0x0c /Channel 1 volume (mute)/
	#define TDA9875_CH2V 0x0d /Channel 2 volume (mute)/
	#define TDA9875_SC1 0x14 /SCART 1 in (mono)/
	#define TDA9875_SC2 0x15 /SCART 2 in (mono)/

	#define TDA9875_ADCIS 0x17 /ADC input select (mono) 0b0110 000/
	#define TDA9875_AER 0x19 /Audio effect (AVL+Pseudo) 0b0000 0110/
	#define TDA9875_MCS 0x18 /Main channel select (DAC) 0b0000100/
	#define TDA9875_MVL 0x1a /* Main volume gauche */
	#define TDA9875_MVR 0x1b /* Main volume droite */
	#define TDA9875_MBA 0x1d /* Main Basse */
	#define TDA9875_MTR 0x1e /* Main treble */
	#define TDA9875_ACS 0x1f /* Auxilary channel select (FM) 0b0000000*/
	#define TDA9875_AVL 0x20 /* Auxilary volume gauche */
	#define TDA9875_AVR 0x21 /* Auxilary volume droite */
	#define TDA9875_ABA 0x22 /* Auxilary Basse */
	#define TDA9875_ATR 0x23 /* Auxilary treble */

	#define TDA9875_MSR 0x02 /* Monitor select register */
	#define TDA9875_C1MSB 0x03 /* Carrier 1 (FM) frequency register MSB */
	#define TDA9875_C1MIB 0x04 /* Carrier 1 (FM) frequency register (16-8]b */
	#define TDA9875_C1LSB 0x05 /* Carrier 1 (FM) frequency register LSB */
	#define TDA9875_C2MSB 0x06 /* Carrier 2 (nicam) frequency register MSB */
	#define TDA9875_C2MIB 0x07 /* Carrier 2 (nicam) frequency register (16-8]b */
	#define TDA9875_C2LSB 0x08 /* Carrier 2 (nicam) frequency register LSB */
	#define TDA9875_DCR 0x09 /* Demodulateur configuration regirter*/
	#define TDA9875_DEEM 0x0a /* FM de-emphasis regirter*/
	#define TDA9875_FMAT 0x0b /* FM Matrix regirter*/

	/* values */
	#define TDA9875_MUTE_ON 0xff /* general mute */
	#define TDA9875_MUTE_OFF 0xcc /* general no mute */



	/* Begin code */

	static int tda9875_write(struct i2c_client *client, int subaddr, unsigned char val)
	{
	unsigned char buffer[2];
	dprintk("In tda9875_write\n");
	dprintk("Writing %d 0x%x\n", subaddr, val);
	buffer[0] = subaddr;
	buffer[1] = val;
	if (2 != i2c_master_send(client,buffer,2)) {
	printk(KERN_WARNING "tda9875: I/O error, trying (write %d 0x%x)\n",
	subaddr, val);
	return -1;
	}
	return 0;
	}


	static int i2c_read_register(struct i2c_adapter *adap, int addr, int reg)
	{
	unsigned char write[1];
	unsigned char read[1];
	struct i2c_msg msgs[2] = {
	{ addr, 0, 1, write },
	{ addr, I2C_M_RD, 1, read }
	};
	write[0] = reg;

	if (2 != i2c_transfer(adap,msgs,2)) {
	printk(KERN_WARNING "tda9875: I/O error (read2)\n");
	return -1;
	}
	dprintk("tda9875: chip_read2: reg%d=0x%x\n",reg,read[0]);
	return read[0];
	}

	static void tda9875_set(struct i2c_client *client)
	{
	struct tda9875 *tda = i2c_get_clientdata(client);
	unsigned char a;

	dprintk(KERN_DEBUG "tda9875_set(%04x,%04x,%04x,%04x)\n",
	tda->lvol,tda->rvol,tda->bass,tda->treble);


	a = tda->lvol & 0xff;
	tda9875_write(client, TDA9875_MVL, a);
	a =tda->rvol & 0xff;
	tda9875_write(client, TDA9875_MVR, a);
	a =tda->bass & 0xff;
	tda9875_write(client, TDA9875_MBA, a);
	a =tda->treble & 0xff;
	tda9875_write(client, TDA9875_MTR, a);
	}

	static void do_tda9875_init(struct i2c_client *client)
	{
	struct tda9875 *t = i2c_get_clientdata(client);
	dprintk("In tda9875_init\n");
	tda9875_write(client, TDA9875_CFG, 0xd0 ); /reg de config 0 (reset)/
	tda9875_write(client, TDA9875_MSR, 0x03 ); /* Monitor 0b00000XXX*/
	tda9875_write(client, TDA9875_C1MSB, 0x00 ); /Car1(FM) MSB XMHz/
	tda9875_write(client, TDA9875_C1MIB, 0x00 ); /Car1(FM) MIB XMHz/
	tda9875_write(client, TDA9875_C1LSB, 0x00 ); /Car1(FM) LSB XMHz/
	tda9875_write(client, TDA9875_C2MSB, 0x00 ); /Car2(NICAM) MSB XMHz/
	tda9875_write(client, TDA9875_C2MIB, 0x00 ); /Car2(NICAM) MIB XMHz/
	tda9875_write(client, TDA9875_C2LSB, 0x00 ); /Car2(NICAM) LSB XMHz/
	tda9875_write(client, TDA9875_DCR, 0x00 ); /Demod config 0x00/
	tda9875_write(client, TDA9875_DEEM, 0x44 ); /DE-Emph 0b0100 0100/
	tda9875_write(client, TDA9875_FMAT, 0x00 ); /FM Matrix reg 0x00/
	tda9875_write(client, TDA9875_SC1, 0x00 ); /* SCART 1 (SC1)*/
	tda9875_write(client, TDA9875_SC2, 0x01 ); /* SCART 2 (sc2)*/

	tda9875_write(client, TDA9875_CH1V, 0x10 ); /* Channel volume 1 mute*/
	tda9875_write(client, TDA9875_CH2V, 0x10 ); /* Channel volume 2 mute */
	tda9875_write(client, TDA9875_DACOS, 0x02 ); /* sig DAC i/o(in:nicam)*/
	tda9875_write(client, TDA9875_ADCIS, 0x6f ); /* sig ADC input(in:mono)*/
	tda9875_write(client, TDA9875_LOSR, 0x00 ); /* line out (in:mono)*/
	tda9875_write(client, TDA9875_AER, 0x00 ); /06 Effect (AVL+PSEUDO) /
	tda9875_write(client, TDA9875_MCS, 0x44 ); /* Main ch select (DAC) */
	tda9875_write(client, TDA9875_MVL, 0x03 ); /* Vol Main left 10dB */
	tda9875_write(client, TDA9875_MVR, 0x03 ); /* Vol Main right 10dB*/
	tda9875_write(client, TDA9875_MBA, 0x00 ); /* Main Bass Main 0dB*/
	tda9875_write(client, TDA9875_MTR, 0x00 ); /* Main Treble Main 0dB*/
	tda9875_write(client, TDA9875_ACS, 0x44 ); /* Aux chan select (dac)*/
	tda9875_write(client, TDA9875_AVL, 0x00 ); /* Vol Aux left 0dB*/
	tda9875_write(client, TDA9875_AVR, 0x00 ); /* Vol Aux right 0dB*/
	tda9875_write(client, TDA9875_ABA, 0x00 ); /* Aux Bass Main 0dB*/
	tda9875_write(client, TDA9875_ATR, 0x00 ); /* Aux Aigus Main 0dB*/

	tda9875_write(client, TDA9875_MUT, 0xcc ); /* General mute */

	t->mode=AUDIO_UNMUTE;
	t->lvol=t->rvol =0; /* 0dB */
	t->bass=0; /* 0dB */
	t->treble=0; /* 0dB */
	tda9875_set(client);

	}


	/* *********************** *
	* i2c interface functions *
	* *********************** */

	static int tda9875_checkit(struct i2c_adapter *adap, int addr)
	{
	int dic,rev;

	dic=i2c_read_register(adap,addr,254);
	rev=i2c_read_register(adap,addr,255);

	if(dic==0 \|\| dic==2) { // tda9875 and tda9875A
	printk("tda9875: TDA9875%s Rev.%d detected at 0x%x\n",
	dic==0?"":"A", rev,addr<<1);
	return 1;
	}
	printk("tda9875: no such chip at 0x%x (dic=0x%x rev=0x%x)\n",addr<<1,dic,rev);
	return(0);
	}

	static int tda9875_attach(struct i2c_adapter *adap, int addr, int kind)
	{
	struct tda9875 *t;
	struct i2c_client *client;
	dprintk("In tda9875_attach\n");

	t = kzalloc(sizeof *t,GFP_KERNEL);
	if (!t)
	return -ENOMEM;

	client = &t->c;
	memcpy(client,&client_template,sizeof(struct i2c_client));
	client->adapter = adap;
	client->addr = addr;
	i2c_set_clientdata(client, t);

	if(!tda9875_checkit(adap,addr)) {
	kfree(t);
	return 1;
	}

	do_tda9875_init(client);
	printk(KERN_INFO "tda9875: init\n");

	i2c_attach_client(client);
	return 0;
	}

	static int tda9875_probe(struct i2c_adapter *adap)
	{
	if (adap->class & I2C_CLASS_TV_ANALOG)
	return i2c_probe(adap, &addr_data, tda9875_attach);
	return 0;
	}

	static int tda9875_detach(struct i2c_client *client)
	{
	struct tda9875 *t = i2c_get_clientdata(client);

	do_tda9875_init(client);
	i2c_detach_client(client);

	kfree(t);
	return 0;
	}

	static int tda9875_command(struct i2c_client *client,
	unsigned int cmd, void *arg)
	{
	struct tda9875 *t = i2c_get_clientdata(client);

	dprintk("In tda9875_command...\n");

	switch (cmd) {
	/* --- v4l ioctls --- */
	/* take care: bttv does userspace copying, we'll get a
	kernel pointer here... */
	case VIDIOCGAUDIO:
	{
	struct video_audio *va = arg;
	int left,right;

	dprintk("VIDIOCGAUDIO\n");

	va->flags \|= VIDEO_AUDIO_VOLUME \|
	VIDEO_AUDIO_BASS \|
	VIDEO_AUDIO_TREBLE;

	/* min is -84 max is 24 */
	left = (t->lvol+84)*606;
	right = (t->rvol+84)*606;
	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;
	va->bass = (t->bass+12)2427; / min -12 max +15 */
	va->treble = (t->treble+12)2730;/ min -12 max +12 */
	va->mode \|= VIDEO_SOUND_MONO;

	break; /* VIDIOCGAUDIO case */
	}

	case VIDIOCSAUDIO:
	{
	struct video_audio *va = arg;
	int left,right;

	dprintk("VIDEOCSAUDIO...\n");
	left = (min(65536 - va->balance,32768) *
	va->volume) / 32768;
	right = (min(va->balance,(__u16)32768) *
	va->volume) / 32768;
	t->lvol = ((left/606)-84) & 0xff;
	if (t->lvol > 24)
	t->lvol = 24;
	if (t->lvol < -84)
	t->lvol = -84 & 0xff;

	t->rvol = ((right/606)-84) & 0xff;
	if (t->rvol > 24)
	t->rvol = 24;
	if (t->rvol < -84)
	t->rvol = -84 & 0xff;

	t->bass = ((va->bass/2400)-12) & 0xff;
	if (t->bass > 15)
	t->bass = 15;
	if (t->bass < -12)
	t->bass = -12 & 0xff;

	t->treble = ((va->treble/2700)-12) & 0xff;
	if (t->treble > 12)
	t->treble = 12;
	if (t->treble < -12)
	t->treble = -12 & 0xff;



	//printk("tda9875 bal:%04x vol:%04x bass:%04x treble:%04x\n",va->balance,va->volume,va->bass,va->treble);


	tda9875_set(client);

	break;

	} /* end of VIDEOCSAUDIO case */

	default: /* Not VIDEOCGAUDIO or VIDEOCSAUDIO */

	/* nothing */
	dprintk("Default\n");

	} /* end of (cmd) switch */

	return 0;
	}


	static struct i2c_driver driver = {
	.driver = {
	.name = "tda9875",
	},
	.id = I2C_DRIVERID_TDA9875,
	.attach_adapter = tda9875_probe,
	.detach_client = tda9875_detach,
	.command = tda9875_command,
	};

	static struct i2c_client client_template =
	{
	.name = "tda9875",
	.driver = &driver,
	};

	static int __init tda9875_init(void)
	{
	return i2c_add_driver(&driver);
	}

	static void __exit tda9875_fini(void)
	{
	i2c_del_driver(&driver);
	}

	module_init(tda9875_init);
	module_exit(tda9875_fini);

	/*
	* Local variables:
	* c-basic-offset: 8
	* End:
	*/