[deliverable/linux.git] / drivers / media / video / tda7432.c

/*
 * For the STS-Thompson TDA7432 audio processor chip
 *
 * Handles audio functions: volume, balance, tone, loudness
 * This driver will not complain if used with any
 * other i2c device with the same address.
 *
 * Muting and tone control by Jonathan Isom <jisom@ematic.com>
 *
 * Copyright (c) 2000 Eric Sandeen <eric_sandeen@bigfoot.com>
 * Copyright (c) 2006 Mauro Carvalho Chehab <mchehab@infradead.org>
 * 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
 *            set to 2 if you'd like to be inundated with debug messages
 *
 * loudness - set between 0 and 15 for varying degrees of loudness effect
 *
 * maxvol   - set maximium volume to +20db (1), default is 0db(0)
 *
 *
 *  Revision: 0.7 - maxvol module parm to set maximium volume 0db or +20db
 *  				store if muted so we can return it
 *  				change balance only if flaged to
 *  Revision: 0.6 - added tone controls
 *  Revision: 0.5 - Fixed odd balance problem
 *  Revision: 0.4 - added muting
 *  Revision: 0.3 - Fixed silly reversed volume controls.  :)
 *  Revision: 0.2 - Cleaned up #defines
 *			fixed volume control
 *          Added I2C_DRIVERID_TDA7432
 *			added loudness insmod control
 *  Revision: 0.1 - initial version
 */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/timer.h>
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/slab.h>
#include <linux/videodev2.h>
#include <linux/i2c.h>

#include <media/v4l2-common.h>
#include <media/v4l2-ioctl.h>
#include <media/i2c-addr.h>

#ifndef VIDEO_AUDIO_BALANCE
# define VIDEO_AUDIO_BALANCE 32
#endif

MODULE_AUTHOR("Eric Sandeen <eric_sandeen@bigfoot.com>");
MODULE_DESCRIPTION("bttv driver for the tda7432 audio processor chip");
MODULE_LICENSE("GPL");

static int maxvol;
static int loudness; /* disable loudness by default */
static int debug;	 /* insmod parameter */
module_param(debug, int, S_IRUGO | S_IWUSR);
module_param(loudness, int, S_IRUGO);
MODULE_PARM_DESC(maxvol,"Set maximium volume to +20db (0), default is 0db(1)");
module_param(maxvol, int, S_IRUGO | S_IWUSR);


/* Address to scan (I2C address of this chip) */
static unsigned short normal_i2c[] = {
	I2C_ADDR_TDA7432 >> 1,
	I2C_CLIENT_END,
};

I2C_CLIENT_INSMOD;

/* Structure of address and subaddresses for the tda7432 */

struct tda7432 {
	int addr;
	int input;
	int volume;
	int muted;
	int bass, treble;
	int lf, lr, rf, rr;
	int loud;
	struct i2c_client c;
};
static struct i2c_driver driver;
static struct i2c_client client_template;

/* The TDA7432 is made by STS-Thompson
 * http://www.st.com
 * http://us.st.com/stonline/books/pdf/docs/4056.pdf
 *
 * TDA7432: I2C-bus controlled basic audio processor
 *
 * The TDA7432 controls basic audio functions like volume, balance,
 * and tone control (including loudness).  It also has four channel
 * output (for front and rear).  Since most vidcap cards probably
 * don't have 4 channel output, this driver will set front & rear
 * together (no independent control).
 */

		/* Subaddresses for TDA7432 */

#define TDA7432_IN	0x00 /* Input select                 */
#define TDA7432_VL	0x01 /* Volume                       */
#define TDA7432_TN	0x02 /* Bass, Treble (Tone)          */
#define TDA7432_LF	0x03 /* Attenuation LF (Left Front)  */
#define TDA7432_LR	0x04 /* Attenuation LR (Left Rear)   */
#define TDA7432_RF	0x05 /* Attenuation RF (Right Front) */
#define TDA7432_RR	0x06 /* Attenuation RR (Right Rear)  */
#define TDA7432_LD	0x07 /* Loudness                     */


		/* Masks for bits in TDA7432 subaddresses */

/* Many of these not used - just for documentation */

/* Subaddress 0x00 - Input selection and bass control */

/* Bits 0,1,2 control input:
 * 0x00 - Stereo input
 * 0x02 - Mono input
 * 0x03 - Mute  (Using Attenuators Plays better with modules)
 * Mono probably isn't used - I'm guessing only the stereo
 * input is connected on most cards, so we'll set it to stereo.
 *
 * Bit 3 controls bass cut: 0/1 is non-symmetric/symmetric bass cut
 * Bit 4 controls bass range: 0/1 is extended/standard bass range
 *
 * Highest 3 bits not used
 */

#define TDA7432_STEREO_IN	0
#define TDA7432_MONO_IN		2	/* Probably won't be used */
#define TDA7432_BASS_SYM	1 << 3
#define TDA7432_BASS_NORM	1 << 4

/* Subaddress 0x01 - Volume */

/* Lower 7 bits control volume from -79dB to +32dB in 1dB steps
 * Recommended maximum is +20 dB
 *
 * +32dB: 0x00
 * +20dB: 0x0c
 *   0dB: 0x20
 * -79dB: 0x6f
 *
 * MSB (bit 7) controls loudness: 1/0 is loudness on/off
 */

#define	TDA7432_VOL_0DB		0x20
#define TDA7432_LD_ON		1 << 7


/* Subaddress 0x02 - Tone control */

/* Bits 0,1,2 control absolute treble gain from 0dB to 14dB
 * 0x0 is 14dB, 0x7 is 0dB
 *
 * Bit 3 controls treble attenuation/gain (sign)
 * 1 = gain (+)
 * 0 = attenuation (-)
 *
 * Bits 4,5,6 control absolute bass gain from 0dB to 14dB
 * (This is only true for normal base range, set in 0x00)
 * 0x0 << 4 is 14dB, 0x7 is 0dB
 *
 * Bit 7 controls bass attenuation/gain (sign)
 * 1 << 7 = gain (+)
 * 0 << 7 = attenuation (-)
 *
 * Example:
 * 1 1 0 1 0 1 0 1 is +4dB bass, -4dB treble
 */

#define TDA7432_TREBLE_0DB		0xf
#define TDA7432_TREBLE			7
#define TDA7432_TREBLE_GAIN		1 << 3
#define TDA7432_BASS_0DB		0xf
#define TDA7432_BASS			7 << 4
#define TDA7432_BASS_GAIN		1 << 7


/* Subaddress 0x03 - Left  Front attenuation */
/* Subaddress 0x04 - Left  Rear  attenuation */
/* Subaddress 0x05 - Right Front attenuation */
/* Subaddress 0x06 - Right Rear  attenuation */

/* Bits 0,1,2,3,4 control attenuation from 0dB to -37.5dB
 * in 1.5dB steps.
 *
 * 0x00 is     0dB
 * 0x1f is -37.5dB
 *
 * Bit 5 mutes that channel when set (1 = mute, 0 = unmute)
 * We'll use the mute on the input, though (above)
 * Bits 6,7 unused
 */

#define TDA7432_ATTEN_0DB	0x00
#define TDA7432_MUTE        0x1 << 5


/* Subaddress 0x07 - Loudness Control */

/* Bits 0,1,2,3 control loudness from 0dB to -15dB in 1dB steps
 * when bit 4 is NOT set
 *
 * 0x0 is   0dB
 * 0xf is -15dB
 *
 * If bit 4 is set, then there is a flat attenuation according to
 * the lower 4 bits, as above.
 *
 * Bits 5,6,7 unused
 */


/* Begin code */

static int tda7432_write(struct i2c_client *client, int subaddr, int val)
{
	unsigned char buffer[2];
	v4l_dbg(2, debug,client,"In tda7432_write\n");
	v4l_dbg(1, debug,client,"Writing %d 0x%x\n", subaddr, val);
	buffer[0] = subaddr;
	buffer[1] = val;
	if (2 != i2c_master_send(client,buffer,2)) {
		v4l_err(client,"I/O error, trying (write %d 0x%x)\n",
		       subaddr, val);
		return -1;
	}
	return 0;
}

/* I don't think we ever actually _read_ the chip... */

static int tda7432_set(struct i2c_client *client)
{
	struct tda7432 *t = i2c_get_clientdata(client);
	unsigned char buf[16];
	v4l_dbg(2, debug,client,"In tda7432_set\n");

	v4l_dbg(1, debug,client,
		"tda7432: 7432_set(0x%02x,0x%02x,0x%02x,0x%02x,0x%02x,0x%02x,0x%02x,0x%02x,0x%02x)\n",
		t->input,t->volume,t->bass,t->treble,t->lf,t->lr,t->rf,t->rr,t->loud);
	buf[0]  = TDA7432_IN;
	buf[1]  = t->input;
	buf[2]  = t->volume;
	buf[3]  = t->bass;
	buf[4]	= t->treble;
	buf[5]  = t->lf;
	buf[6]  = t->lr;
	buf[7]  = t->rf;
	buf[8]  = t->rr;
	buf[9]  = t->loud;
	if (10 != i2c_master_send(client,buf,10)) {
		v4l_err(client,"I/O error, trying tda7432_set\n");
		return -1;
	}

	return 0;
}

static void do_tda7432_init(struct i2c_client *client)
{
	struct tda7432 *t = i2c_get_clientdata(client);
	v4l_dbg(2, debug,client,"In tda7432_init\n");

	t->input  = TDA7432_STEREO_IN |  /* Main (stereo) input   */
		    TDA7432_BASS_SYM  |  /* Symmetric bass cut    */
		    TDA7432_BASS_NORM;   /* Normal bass range     */
	t->volume =  0x3b ;				 /* -27dB Volume            */
	if (loudness)			 /* Turn loudness on?     */
		t->volume |= TDA7432_LD_ON;
	t->muted    = 1;
	t->treble   = TDA7432_TREBLE_0DB; /* 0dB Treble            */
	t->bass		= TDA7432_BASS_0DB; 	 /* 0dB Bass              */
	t->lf     = TDA7432_ATTEN_0DB;	 /* 0dB attenuation       */
	t->lr     = TDA7432_ATTEN_0DB;	 /* 0dB attenuation       */
	t->rf     = TDA7432_ATTEN_0DB;	 /* 0dB attenuation       */
	t->rr     = TDA7432_ATTEN_0DB;	 /* 0dB attenuation       */
	t->loud   = loudness;		 /* insmod parameter      */

	tda7432_set(client);
}

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

static int tda7432_attach(struct i2c_adapter *adap, int addr, int kind)
{
	struct tda7432 *t;
	struct i2c_client *client;

	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);

	do_tda7432_init(client);
	i2c_attach_client(client);

	v4l_info(client, "chip found @ 0x%x (%s)\n", addr << 1, adap->name);
	return 0;
}

static int tda7432_probe(struct i2c_adapter *adap)
{
	if (adap->class & I2C_CLASS_TV_ANALOG)
		return i2c_probe(adap, &addr_data, tda7432_attach);
	return 0;
}

static int tda7432_detach(struct i2c_client *client)
{
	struct tda7432 *t  = i2c_get_clientdata(client);

	do_tda7432_init(client);
	i2c_detach_client(client);

	kfree(t);
	return 0;
}

static int tda7432_get_ctrl(struct i2c_client *client,
			    struct v4l2_control *ctrl)
{
	struct tda7432 *t = i2c_get_clientdata(client);

	switch (ctrl->id) {
	case V4L2_CID_AUDIO_MUTE:
		ctrl->value=t->muted;
		return 0;
	case V4L2_CID_AUDIO_VOLUME:
		if (!maxvol){  /* max +20db */
			ctrl->value = ( 0x6f - (t->volume & 0x7F) ) * 630;
		} else {       /* max 0db   */
			ctrl->value = ( 0x6f - (t->volume & 0x7F) ) * 829;
		}
		return 0;
	case V4L2_CID_AUDIO_BALANCE:
	{
		if ( (t->lf) < (t->rf) )
			/* right is attenuated, balance shifted left */
			ctrl->value = (32768 - 1057*(t->rf));
		else
			/* left is attenuated, balance shifted right */
			ctrl->value = (32768 + 1057*(t->lf));
		return 0;
	}
	case V4L2_CID_AUDIO_BASS:
	{
		/* Bass/treble 4 bits each */
		int bass=t->bass;
		if(bass >= 0x8)
			bass = ~(bass - 0x8) & 0xf;
		ctrl->value = (bass << 12)+(bass << 8)+(bass << 4)+(bass);
		return 0;
	}
	case V4L2_CID_AUDIO_TREBLE:
	{
		int treble=t->treble;
		if(treble >= 0x8)
			treble = ~(treble - 0x8) & 0xf;
		ctrl->value = (treble << 12)+(treble << 8)+(treble << 4)+(treble);
		return 0;
	}
	}
	return -EINVAL;
}

static int tda7432_set_ctrl(struct i2c_client *client,
			    struct v4l2_control *ctrl)
{
	struct tda7432 *t = i2c_get_clientdata(client);

	switch (ctrl->id) {
	case V4L2_CID_AUDIO_MUTE:
		t->muted=ctrl->value;
		break;
	case V4L2_CID_AUDIO_VOLUME:
		if(!maxvol){ /* max +20db */
			t->volume = 0x6f - ((ctrl->value)/630);
		} else {    /* max 0db   */
			t->volume = 0x6f - ((ctrl->value)/829);
		}
		if (loudness)		/* Turn on the loudness bit */
			t->volume |= TDA7432_LD_ON;

		tda7432_write(client,TDA7432_VL, t->volume);
		return 0;
	case V4L2_CID_AUDIO_BALANCE:
		if (ctrl->value < 32768) {
			/* shifted to left, attenuate right */
			t->rr = (32768 - ctrl->value)/1057;
			t->rf = t->rr;
			t->lr = TDA7432_ATTEN_0DB;
			t->lf = TDA7432_ATTEN_0DB;
		} else if(ctrl->value > 32769) {
			/* shifted to right, attenuate left */
			t->lf = (ctrl->value - 32768)/1057;
			t->lr = t->lf;
			t->rr = TDA7432_ATTEN_0DB;
			t->rf = TDA7432_ATTEN_0DB;
		} else {
			/* centered */
			t->rr = TDA7432_ATTEN_0DB;
			t->rf = TDA7432_ATTEN_0DB;
			t->lf = TDA7432_ATTEN_0DB;
			t->lr = TDA7432_ATTEN_0DB;
		}
		break;
	case V4L2_CID_AUDIO_BASS:
		t->bass = ctrl->value >> 12;
		if(t->bass>= 0x8)
				t->bass = (~t->bass & 0xf) + 0x8 ;

		tda7432_write(client,TDA7432_TN, 0x10 | (t->bass << 4) | t->treble );
		return 0;
	case V4L2_CID_AUDIO_TREBLE:
		t->treble= ctrl->value >> 12;
		if(t->treble>= 0x8)
				t->treble = (~t->treble & 0xf) + 0x8 ;

		tda7432_write(client,TDA7432_TN, 0x10 | (t->bass << 4) | t->treble );
		return 0;
	default:
		return -EINVAL;
	}

	/* Used for both mute and balance changes */
	if (t->muted)
	{
		/* Mute & update balance*/
		tda7432_write(client,TDA7432_LF, t->lf | TDA7432_MUTE);
		tda7432_write(client,TDA7432_LR, t->lr | TDA7432_MUTE);
		tda7432_write(client,TDA7432_RF, t->rf | TDA7432_MUTE);
		tda7432_write(client,TDA7432_RR, t->rr | TDA7432_MUTE);
	} else {
		tda7432_write(client,TDA7432_LF, t->lf);
		tda7432_write(client,TDA7432_LR, t->lr);
		tda7432_write(client,TDA7432_RF, t->rf);
		tda7432_write(client,TDA7432_RR, t->rr);
	}
	return 0;
}

static int tda7432_command(struct i2c_client *client,
			   unsigned int cmd, void *arg)
{
	v4l_dbg(2, debug,client,"In tda7432_command\n");
	if (debug>1)
		v4l_i2c_print_ioctl(client,cmd);

	switch (cmd) {
	/* --- v4l ioctls --- */
	/* take care: bttv does userspace copying, we'll get a
	   kernel pointer here... */
	case VIDIOC_QUERYCTRL:
	{
		struct v4l2_queryctrl *qc = arg;

		switch (qc->id) {
			case V4L2_CID_AUDIO_MUTE:
			case V4L2_CID_AUDIO_VOLUME:
			case V4L2_CID_AUDIO_BALANCE:
			case V4L2_CID_AUDIO_BASS:
			case V4L2_CID_AUDIO_TREBLE:
			default:
				return -EINVAL;
		}
		return v4l2_ctrl_query_fill_std(qc);
	}
	case VIDIOC_S_CTRL:
		return tda7432_set_ctrl(client, arg);

	case VIDIOC_G_CTRL:
		return tda7432_get_ctrl(client, arg);

	} /* end of (cmd) switch */

	return 0;
}

static struct i2c_driver driver = {
	.driver = {
		.name    = "tda7432",
	},
	.id              = I2C_DRIVERID_TDA7432,
	.attach_adapter  = tda7432_probe,
	.detach_client   = tda7432_detach,
	.command         = tda7432_command,
};

static struct i2c_client client_template =
{
	.name       = "tda7432",
	.driver     = &driver,
};

static int __init tda7432_init(void)
{
	if ( (loudness < 0) || (loudness > 15) ) {
		printk(KERN_ERR "loudness parameter must be between 0 and 15\n");
		return -EINVAL;
	}

	return i2c_add_driver(&driver);
}

static void __exit tda7432_fini(void)
{
	i2c_del_driver(&driver);
}

module_init(tda7432_init);
module_exit(tda7432_fini);

/*
 * Local variables:
 * c-basic-offset: 8
 * End:
 */
Commit	Line	Data
1da177e4 LT	1	/*
	2	* For the STS-Thompson TDA7432 audio processor chip
	3	*
	4	* Handles audio functions: volume, balance, tone, loudness
	5	* This driver will not complain if used with any
	6	* other i2c device with the same address.
	7	*
	8	* Muting and tone control by Jonathan Isom <jisom@ematic.com>
	9	*
	10	* Copyright (c) 2000 Eric Sandeen <eric_sandeen@bigfoot.com>
7a00d45c	11	* Copyright (c) 2006 Mauro Carvalho Chehab <mchehab@infradead.org>
1da177e4 LT	12	* This code is placed under the terms of the GNU General Public License
	13	* Based on tda9855.c by Steve VanDeBogart (vandebo@uclink.berkeley.edu)
	14	* Which was based on tda8425.c by Greg Alexander (c) 1998
	15	*
	16	* OPTIONS:
	17	* debug - set to 1 if you'd like to see debug messages
	18	* set to 2 if you'd like to be inundated with debug messages
	19	*
	20	* loudness - set between 0 and 15 for varying degrees of loudness effect
	21	*
	22	* maxvol - set maximium volume to +20db (1), default is 0db(0)
	23	*
	24	*
	25	* Revision: 0.7 - maxvol module parm to set maximium volume 0db or +20db
	26	* store if muted so we can return it
	27	* change balance only if flaged to
	28	* Revision: 0.6 - added tone controls
	29	* Revision: 0.5 - Fixed odd balance problem
	30	* Revision: 0.4 - added muting
	31	* Revision: 0.3 - Fixed silly reversed volume controls. :)
	32	* Revision: 0.2 - Cleaned up #defines
	33	* fixed volume control
	34	* Added I2C_DRIVERID_TDA7432
	35	* added loudness insmod control
	36	* Revision: 0.1 - initial version
	37	*/
	38
	39	#include <linux/module.h>
	40	#include <linux/init.h>
	41	#include <linux/kernel.h>
1da177e4 LT	42	#include <linux/string.h>
	43	#include <linux/timer.h>
	44	#include <linux/delay.h>
	45	#include <linux/errno.h>
	46	#include <linux/slab.h>
33b687cf	47	#include <linux/videodev2.h>
1da177e4	48	#include <linux/i2c.h>
1da177e4	49
0680481c	50	#include <media/v4l2-common.h>
35ea11ff	51	#include <media/v4l2-ioctl.h>
fa3fcceb	52	#include <media/i2c-addr.h>
1da177e4 LT	53
	54	#ifndef VIDEO_AUDIO_BALANCE
	55	# define VIDEO_AUDIO_BALANCE 32
	56	#endif
	57
	58	MODULE_AUTHOR("Eric Sandeen <eric_sandeen@bigfoot.com>");
	59	MODULE_DESCRIPTION("bttv driver for the tda7432 audio processor chip");
	60	MODULE_LICENSE("GPL");
	61
	62	static int maxvol;
	63	static int loudness; /* disable loudness by default */
	64	static int debug; /* insmod parameter */
	65	module_param(debug, int, S_IRUGO \| S_IWUSR);
	66	module_param(loudness, int, S_IRUGO);
	67	MODULE_PARM_DESC(maxvol,"Set maximium volume to +20db (0), default is 0db(1)");
	68	module_param(maxvol, int, S_IRUGO \| S_IWUSR);
	69
	70
	71	/* Address to scan (I2C address of this chip) */
	72	static unsigned short normal_i2c[] = {
09df1c16	73	I2C_ADDR_TDA7432 >> 1,
1da177e4 LT	74	I2C_CLIENT_END,
1da177e4 LT	75	};
f87086e3	76
1da177e4 LT	77	I2C_CLIENT_INSMOD;
	78
	79	/* Structure of address and subaddresses for the tda7432 */
	80
	81	struct tda7432 {
	82	int addr;
	83	int input;
	84	int volume;
	85	int muted;
	86	int bass, treble;
	87	int lf, lr, rf, rr;
	88	int loud;
	89	struct i2c_client c;
	90	};
	91	static struct i2c_driver driver;
	92	static struct i2c_client client_template;
	93
1da177e4 LT	94	/* The TDA7432 is made by STS-Thompson
	95	* http://www.st.com
	96	* http://us.st.com/stonline/books/pdf/docs/4056.pdf
	97	*
	98	* TDA7432: I2C-bus controlled basic audio processor
	99	*
	100	* The TDA7432 controls basic audio functions like volume, balance,
	101	* and tone control (including loudness). It also has four channel
	102	* output (for front and rear). Since most vidcap cards probably
	103	* don't have 4 channel output, this driver will set front & rear
	104	* together (no independent control).
	105	*/
	106
	107	/* Subaddresses for TDA7432 */
	108
	109	#define TDA7432_IN 0x00 /* Input select */
	110	#define TDA7432_VL 0x01 /* Volume */
	111	#define TDA7432_TN 0x02 /* Bass, Treble (Tone) */
	112	#define TDA7432_LF 0x03 /* Attenuation LF (Left Front) */
	113	#define TDA7432_LR 0x04 /* Attenuation LR (Left Rear) */
	114	#define TDA7432_RF 0x05 /* Attenuation RF (Right Front) */
	115	#define TDA7432_RR 0x06 /* Attenuation RR (Right Rear) */
	116	#define TDA7432_LD 0x07 /* Loudness */
	117
	118
	119	/* Masks for bits in TDA7432 subaddresses */
	120
	121	/* Many of these not used - just for documentation */
	122
	123	/* Subaddress 0x00 - Input selection and bass control */
	124
	125	/* Bits 0,1,2 control input:
	126	* 0x00 - Stereo input
	127	* 0x02 - Mono input
	128	* 0x03 - Mute (Using Attenuators Plays better with modules)
	129	* Mono probably isn't used - I'm guessing only the stereo
	130	* input is connected on most cards, so we'll set it to stereo.
	131	*
	132	* Bit 3 controls bass cut: 0/1 is non-symmetric/symmetric bass cut
	133	* Bit 4 controls bass range: 0/1 is extended/standard bass range
	134	*
	135	* Highest 3 bits not used
	136	*/
	137
	138	#define TDA7432_STEREO_IN 0
	139	#define TDA7432_MONO_IN 2 /* Probably won't be used */
	140	#define TDA7432_BASS_SYM 1 << 3
	141	#define TDA7432_BASS_NORM 1 << 4
	142
	143	/* Subaddress 0x01 - Volume */
	144
	145	/* Lower 7 bits control volume from -79dB to +32dB in 1dB steps
	146	* Recommended maximum is +20 dB
	147	*
	148	* +32dB: 0x00
	149	* +20dB: 0x0c
	150	* 0dB: 0x20
	151	* -79dB: 0x6f
	152	*
	153	* MSB (bit 7) controls loudness: 1/0 is loudness on/off
	154	*/
	155
	156	#define TDA7432_VOL_0DB 0x20
	157	#define TDA7432_LD_ON 1 << 7
158
159
160	/* Subaddress 0x02 - Tone control */
161
162	/* Bits 0,1,2 control absolute treble gain from 0dB to 14dB
163	* 0x0 is 14dB, 0x7 is 0dB
164	*
165	* Bit 3 controls treble attenuation/gain (sign)
166	* 1 = gain (+)
167	* 0 = attenuation (-)
168	*
169	* Bits 4,5,6 control absolute bass gain from 0dB to 14dB
170	* (This is only true for normal base range, set in 0x00)
171	* 0x0 << 4 is 14dB, 0x7 is 0dB
172	*
173	* Bit 7 controls bass attenuation/gain (sign)
174	* 1 << 7 = gain (+)
175	* 0 << 7 = attenuation (-)
176	*
177	* Example:
178	* 1 1 0 1 0 1 0 1 is +4dB bass, -4dB treble
179	*/
180
181	#define TDA7432_TREBLE_0DB 0xf
182	#define TDA7432_TREBLE 7
183	#define TDA7432_TREBLE_GAIN 1 << 3
184	#define TDA7432_BASS_0DB 0xf
185	#define TDA7432_BASS 7 << 4
186	#define TDA7432_BASS_GAIN 1 << 7
187
188
189	/* Subaddress 0x03 - Left Front attenuation */
190	/* Subaddress 0x04 - Left Rear attenuation */
191	/* Subaddress 0x05 - Right Front attenuation */
192	/* Subaddress 0x06 - Right Rear attenuation */
193
194	/* Bits 0,1,2,3,4 control attenuation from 0dB to -37.5dB
195	* in 1.5dB steps.
196	*
197	* 0x00 is 0dB
198	* 0x1f is -37.5dB
199	*
200	* Bit 5 mutes that channel when set (1 = mute, 0 = unmute)
201	* We'll use the mute on the input, though (above)
202	* Bits 6,7 unused
203	*/
204
205	#define TDA7432_ATTEN_0DB 0x00
206	#define TDA7432_MUTE 0x1 << 5
207
208
209	/* Subaddress 0x07 - Loudness Control */
210
211	/* Bits 0,1,2,3 control loudness from 0dB to -15dB in 1dB steps
212	* when bit 4 is NOT set
213	*
214	* 0x0 is 0dB
215	* 0xf is -15dB
216	*
217	* If bit 4 is set, then there is a flat attenuation according to
218	* the lower 4 bits, as above.
219	*
220	* Bits 5,6,7 unused
221	*/
222
223
224
225	/* Begin code */
226
227	static int tda7432_write(struct i2c_client *client, int subaddr, int val)
228	{
229	unsigned char buffer[2];
f167cb4e MCC	230	v4l_dbg(2, debug,client,"In tda7432_write\n");
f167cb4e MCC	231	v4l_dbg(1, debug,client,"Writing %d 0x%x\n", subaddr, val);
1da177e4 LT	232	buffer[0] = subaddr;
	233	buffer[1] = val;
	234	if (2 != i2c_master_send(client,buffer,2)) {
0680481c	235	v4l_err(client,"I/O error, trying (write %d 0x%x)\n",
1da177e4 LT	236	subaddr, val);
	237	return -1;
	238	}
	239	return 0;
	240	}
	241
	242	/* I don't think we ever actually _read_ the chip... */
1da177e4 LT	243
	244	static int tda7432_set(struct i2c_client *client)
	245	{
	246	struct tda7432 *t = i2c_get_clientdata(client);
	247	unsigned char buf[16];
f167cb4e	248	v4l_dbg(2, debug,client,"In tda7432_set\n");
1da177e4	249
f167cb4e	250	v4l_dbg(1, debug,client,
1da177e4 LT	251	"tda7432: 7432_set(0x%02x,0x%02x,0x%02x,0x%02x,0x%02x,0x%02x,0x%02x,0x%02x,0x%02x)\n",
	252	t->input,t->volume,t->bass,t->treble,t->lf,t->lr,t->rf,t->rr,t->loud);
	253	buf[0] = TDA7432_IN;
	254	buf[1] = t->input;
	255	buf[2] = t->volume;
	256	buf[3] = t->bass;
	257	buf[4] = t->treble;
	258	buf[5] = t->lf;
	259	buf[6] = t->lr;
	260	buf[7] = t->rf;
	261	buf[8] = t->rr;
	262	buf[9] = t->loud;
	263	if (10 != i2c_master_send(client,buf,10)) {
0680481c	264	v4l_err(client,"I/O error, trying tda7432_set\n");
1da177e4 LT	265	return -1;
	266	}
	267
	268	return 0;
	269	}
	270
	271	static void do_tda7432_init(struct i2c_client *client)
	272	{
	273	struct tda7432 *t = i2c_get_clientdata(client);
f167cb4e	274	v4l_dbg(2, debug,client,"In tda7432_init\n");
1da177e4 LT	275
	276	t->input = TDA7432_STEREO_IN \| /* Main (stereo) input */
	277	TDA7432_BASS_SYM \| /* Symmetric bass cut */
	278	TDA7432_BASS_NORM; /* Normal bass range */
	279	t->volume = 0x3b ; /* -27dB Volume */
	280	if (loudness) /* Turn loudness on? */
	281	t->volume \|= TDA7432_LD_ON;
7a00d45c	282	t->muted = 1;
1da177e4 LT	283	t->treble = TDA7432_TREBLE_0DB; /* 0dB Treble */
	284	t->bass = TDA7432_BASS_0DB; /* 0dB Bass */
	285	t->lf = TDA7432_ATTEN_0DB; /* 0dB attenuation */
	286	t->lr = TDA7432_ATTEN_0DB; /* 0dB attenuation */
	287	t->rf = TDA7432_ATTEN_0DB; /* 0dB attenuation */
	288	t->rr = TDA7432_ATTEN_0DB; /* 0dB attenuation */
	289	t->loud = loudness; /* insmod parameter */
	290
	291	tda7432_set(client);
	292	}
	293
	294	/* *********************** *
	295	* i2c interface functions *
	296	* *********************** */
	297
	298	static int tda7432_attach(struct i2c_adapter *adap, int addr, int kind)
	299	{
	300	struct tda7432 *t;
	301	struct i2c_client *client;
1da177e4	302
7408187d	303	t = kzalloc(sizeof *t,GFP_KERNEL);
1da177e4 LT	304	if (!t)
1da177e4 LT	305	return -ENOMEM;
1da177e4 LT	306
1da177e4 LT	307	client = &t->c;
4ac97914 MCC	308	memcpy(client,&client_template,sizeof(struct i2c_client));
	309	client->adapter = adap;
	310	client->addr = addr;
1da177e4 LT	311	i2c_set_clientdata(client, t);
	312
	313	do_tda7432_init(client);
1da177e4	314	i2c_attach_client(client);
0680481c MCC	315
0680481c MCC	316	v4l_info(client, "chip found @ 0x%x (%s)\n", addr << 1, adap->name);
1da177e4 LT	317	return 0;
	318	}
	319
	320	static int tda7432_probe(struct i2c_adapter *adap)
	321	{
1da177e4 LT	322	if (adap->class & I2C_CLASS_TV_ANALOG)
1da177e4 LT	323	return i2c_probe(adap, &addr_data, tda7432_attach);
1da177e4 LT	324	return 0;
	325	}
	326
	327	static int tda7432_detach(struct i2c_client *client)
	328	{
	329	struct tda7432 *t = i2c_get_clientdata(client);
	330
	331	do_tda7432_init(client);
	332	i2c_detach_client(client);
	333
	334	kfree(t);
	335	return 0;
	336	}
	337
7a00d45c MCC	338	static int tda7432_get_ctrl(struct i2c_client *client,
7a00d45c MCC	339	struct v4l2_control *ctrl)
1da177e4 LT	340	{
1da177e4 LT	341	struct tda7432 *t = i2c_get_clientdata(client);
1da177e4	342
7a00d45c MCC	343	switch (ctrl->id) {
	344	case V4L2_CID_AUDIO_MUTE:
	345	ctrl->value=t->muted;
	346	return 0;
	347	case V4L2_CID_AUDIO_VOLUME:
1da177e4	348	if (!maxvol){ /* max +20db */
7a00d45c	349	ctrl->value = ( 0x6f - (t->volume & 0x7F) ) * 630;
1da177e4	350	} else { /* max 0db */
7a00d45c	351	ctrl->value = ( 0x6f - (t->volume & 0x7F) ) * 829;
1da177e4	352	}
7a00d45c MCC	353	return 0;
	354	case V4L2_CID_AUDIO_BALANCE:
	355	{
1da177e4 LT	356	if ( (t->lf) < (t->rf) )
1da177e4 LT	357	/* right is attenuated, balance shifted left */
7a00d45c	358	ctrl->value = (32768 - 1057*(t->rf));
1da177e4 LT	359	else
1da177e4 LT	360	/* left is attenuated, balance shifted right */
7a00d45c MCC	361	ctrl->value = (32768 + 1057*(t->lf));
	362	return 0;
	363	}
	364	case V4L2_CID_AUDIO_BASS:
	365	{
1da177e4	366	/* Bass/treble 4 bits each */
7a00d45c MCC	367	int bass=t->bass;
	368	if(bass >= 0x8)
	369	bass = ~(bass - 0x8) & 0xf;
	370	ctrl->value = (bass << 12)+(bass << 8)+(bass << 4)+(bass);
	371	return 0;
1da177e4	372	}
7a00d45c	373	case V4L2_CID_AUDIO_TREBLE:
1da177e4	374	{
7a00d45c MCC	375	int treble=t->treble;
	376	if(treble >= 0x8)
	377	treble = ~(treble - 0x8) & 0xf;
	378	ctrl->value = (treble << 12)+(treble << 8)+(treble << 4)+(treble);
	379	return 0;
	380	}
	381	}
	382	return -EINVAL;
	383	}
1da177e4	384
7a00d45c MCC	385	static int tda7432_set_ctrl(struct i2c_client *client,
	386	struct v4l2_control *ctrl)
	387	{
	388	struct tda7432 *t = i2c_get_clientdata(client);
1da177e4	389
7a00d45c MCC	390	switch (ctrl->id) {
	391	case V4L2_CID_AUDIO_MUTE:
	392	t->muted=ctrl->value;
	393	break;
	394	case V4L2_CID_AUDIO_VOLUME:
	395	if(!maxvol){ /* max +20db */
	396	t->volume = 0x6f - ((ctrl->value)/630);
	397	} else { /* max 0db */
	398	t->volume = 0x6f - ((ctrl->value)/829);
	399	}
1da177e4 LT	400	if (loudness) /* Turn on the loudness bit */
	401	t->volume \|= TDA7432_LD_ON;
	402
7a00d45c MCC	403	tda7432_write(client,TDA7432_VL, t->volume);
	404	return 0;
	405	case V4L2_CID_AUDIO_BALANCE:
	406	if (ctrl->value < 32768) {
1da177e4	407	/* shifted to left, attenuate right */
7a00d45c	408	t->rr = (32768 - ctrl->value)/1057;
1da177e4 LT	409	t->rf = t->rr;
	410	t->lr = TDA7432_ATTEN_0DB;
	411	t->lf = TDA7432_ATTEN_0DB;
7a00d45c	412	} else if(ctrl->value > 32769) {
1da177e4	413	/* shifted to right, attenuate left */
7a00d45c	414	t->lf = (ctrl->value - 32768)/1057;
1da177e4 LT	415	t->lr = t->lf;
	416	t->rr = TDA7432_ATTEN_0DB;
	417	t->rf = TDA7432_ATTEN_0DB;
7a00d45c	418	} else {
1da177e4 LT	419	/* centered */
	420	t->rr = TDA7432_ATTEN_0DB;
	421	t->rf = TDA7432_ATTEN_0DB;
	422	t->lf = TDA7432_ATTEN_0DB;
	423	t->lr = TDA7432_ATTEN_0DB;
	424	}
7a00d45c MCC	425	break;
	426	case V4L2_CID_AUDIO_BASS:
	427	t->bass = ctrl->value >> 12;
	428	if(t->bass>= 0x8)
	429	t->bass = (~t->bass & 0xf) + 0x8 ;
	430
	431	tda7432_write(client,TDA7432_TN, 0x10 \| (t->bass << 4) \| t->treble );
	432	return 0;
	433	case V4L2_CID_AUDIO_TREBLE:
	434	t->treble= ctrl->value >> 12;
	435	if(t->treble>= 0x8)
	436	t->treble = (~t->treble & 0xf) + 0x8 ;
	437
	438	tda7432_write(client,TDA7432_TN, 0x10 \| (t->bass << 4) \| t->treble );
	439	return 0;
	440	default:
	441	return -EINVAL;
	442	}
1da177e4	443
7a00d45c MCC	444	/* Used for both mute and balance changes */
	445	if (t->muted)
	446	{
	447	/* Mute & update balance*/
	448	tda7432_write(client,TDA7432_LF, t->lf \| TDA7432_MUTE);
	449	tda7432_write(client,TDA7432_LR, t->lr \| TDA7432_MUTE);
	450	tda7432_write(client,TDA7432_RF, t->rf \| TDA7432_MUTE);
	451	tda7432_write(client,TDA7432_RR, t->rr \| TDA7432_MUTE);
	452	} else {
	453	tda7432_write(client,TDA7432_LF, t->lf);
	454	tda7432_write(client,TDA7432_LR, t->lr);
	455	tda7432_write(client,TDA7432_RF, t->rf);
	456	tda7432_write(client,TDA7432_RR, t->rr);
	457	}
	458	return 0;
	459	}
1da177e4	460
7a00d45c MCC	461	static int tda7432_command(struct i2c_client *client,
	462	unsigned int cmd, void *arg)
	463	{
	464	v4l_dbg(2, debug,client,"In tda7432_command\n");
	465	if (debug>1)
	466	v4l_i2c_print_ioctl(client,cmd);
	467
	468	switch (cmd) {
	469	/* --- v4l ioctls --- */
	470	/* take care: bttv does userspace copying, we'll get a
	471	kernel pointer here... */
	472	case VIDIOC_QUERYCTRL:
	473	{
	474	struct v4l2_queryctrl *qc = arg;
	475
	476	switch (qc->id) {
	477	case V4L2_CID_AUDIO_MUTE:
	478	case V4L2_CID_AUDIO_VOLUME:
	479	case V4L2_CID_AUDIO_BALANCE:
	480	case V4L2_CID_AUDIO_BASS:
	481	case V4L2_CID_AUDIO_TREBLE:
	482	default:
	483	return -EINVAL;
	484	}
	485	return v4l2_ctrl_query_fill_std(qc);
	486	}
	487	case VIDIOC_S_CTRL:
	488	return tda7432_set_ctrl(client, arg);
1da177e4	489
7a00d45c MCC	490	case VIDIOC_G_CTRL:
7a00d45c MCC	491	return tda7432_get_ctrl(client, arg);
1da177e4	492
1da177e4 LT	493	} /* end of (cmd) switch */
	494
	495	return 0;
	496	}
	497
	498	static struct i2c_driver driver = {
604f28e2	499	.driver = {
cab462f7	500	.name = "tda7432",
604f28e2	501	},
1da177e4	502	.id = I2C_DRIVERID_TDA7432,
1da177e4	503	.attach_adapter = tda7432_probe,
4ac97914 MCC	504	.detach_client = tda7432_detach,
4ac97914 MCC	505	.command = tda7432_command,
1da177e4 LT	506	};
	507
	508	static struct i2c_client client_template =
	509	{
fae91e72	510	.name = "tda7432",
1da177e4 LT	511	.driver = &driver,
	512	};
	513
	514	static int __init tda7432_init(void)
	515	{
	516	if ( (loudness < 0) \|\| (loudness > 15) ) {
0680481c	517	printk(KERN_ERR "loudness parameter must be between 0 and 15\n");
1da177e4 LT	518	return -EINVAL;
	519	}
	520
	521	return i2c_add_driver(&driver);
	522	}
	523
	524	static void __exit tda7432_fini(void)
	525	{
	526	i2c_del_driver(&driver);
	527	}
	528
	529	module_init(tda7432_init);
	530	module_exit(tda7432_fini);
	531
	532	/*
	533	* Local variables:
	534	* c-basic-offset: 8
	535	* End:
	536	*/