[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)
 */

#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-device.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);


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

struct tda7432 {
	struct v4l2_subdev sd;
	int addr;
	int input;
	int volume;
	int muted;
	int bass, treble;
	int lf, lr, rf, rr;
	int loud;
};

static inline struct tda7432 *to_state(struct v4l2_subdev *sd)
{
	return container_of(sd, struct tda7432, sd);
}

/* 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 v4l2_subdev *sd, int subaddr, int val)
{
	struct i2c_client *client = v4l2_get_subdevdata(sd);
	unsigned char buffer[2];

	v4l2_dbg(2, debug, sd, "In tda7432_write\n");
	v4l2_dbg(1, debug, sd, "Writing %d 0x%x\n", subaddr, val);
	buffer[0] = subaddr;
	buffer[1] = val;
	if (2 != i2c_master_send(client, buffer, 2)) {
		v4l2_err(sd, "I/O error, trying (write %d 0x%x)\n",
		       subaddr, val);
		return -1;
	}
	return 0;
}

static int tda7432_set(struct v4l2_subdev *sd)
{
	struct i2c_client *client = v4l2_get_subdevdata(sd);
	struct tda7432 *t = to_state(sd);
	unsigned char buf[16];

	v4l2_dbg(1, debug, sd,
		"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)) {
		v4l2_err(sd, "I/O error, trying tda7432_set\n");
		return -1;
	}

	return 0;
}

static void do_tda7432_init(struct v4l2_subdev *sd)
{
	struct tda7432 *t = to_state(sd);

	v4l2_dbg(2, debug, sd, "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(sd);
}

static int tda7432_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
{
	struct tda7432 *t = to_state(sd);

	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_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
{
	struct tda7432 *t = to_state(sd);

	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(sd, 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(sd, 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(sd, 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(sd, TDA7432_LF, t->lf | TDA7432_MUTE);
		tda7432_write(sd, TDA7432_LR, t->lr | TDA7432_MUTE);
		tda7432_write(sd, TDA7432_RF, t->rf | TDA7432_MUTE);
		tda7432_write(sd, TDA7432_RR, t->rr | TDA7432_MUTE);
	} else {
		tda7432_write(sd, TDA7432_LF, t->lf);
		tda7432_write(sd, TDA7432_LR, t->lr);
		tda7432_write(sd, TDA7432_RF, t->rf);
		tda7432_write(sd, TDA7432_RR, t->rr);
	}
	return 0;
}

static int tda7432_queryctrl(struct v4l2_subdev *sd, struct v4l2_queryctrl *qc)
{
	switch (qc->id) {
	case V4L2_CID_AUDIO_VOLUME:
		return v4l2_ctrl_query_fill(qc, 0, 65535, 65535 / 100, 58880);
	case V4L2_CID_AUDIO_MUTE:
		return v4l2_ctrl_query_fill(qc, 0, 1, 1, 0);
	case V4L2_CID_AUDIO_BALANCE:
	case V4L2_CID_AUDIO_BASS:
	case V4L2_CID_AUDIO_TREBLE:
		return v4l2_ctrl_query_fill(qc, 0, 65535, 65535 / 100, 32768);
	}
	return -EINVAL;
}

/* ----------------------------------------------------------------------- */

static const struct v4l2_subdev_core_ops tda7432_core_ops = {
	.queryctrl = tda7432_queryctrl,
	.g_ctrl = tda7432_g_ctrl,
	.s_ctrl = tda7432_s_ctrl,
};

static const struct v4l2_subdev_ops tda7432_ops = {
	.core = &tda7432_core_ops,
};

/* ----------------------------------------------------------------------- */

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

static int tda7432_probe(struct i2c_client *client,
			const struct i2c_device_id *id)
{
	struct tda7432 *t;
	struct v4l2_subdev *sd;

	v4l_info(client, "chip found @ 0x%02x (%s)\n",
			client->addr << 1, client->adapter->name);

	t = kzalloc(sizeof(*t), GFP_KERNEL);
	if (!t)
		return -ENOMEM;
	sd = &t->sd;
	v4l2_i2c_subdev_init(sd, client, &tda7432_ops);
	if (loudness < 0 || loudness > 15) {
		v4l2_warn(sd, "loudness parameter must be between 0 and 15\n");
		if (loudness < 0)
			loudness = 0;
		if (loudness > 15)
			loudness = 15;
	}

	do_tda7432_init(sd);
	return 0;
}

static int tda7432_remove(struct i2c_client *client)
{
	struct v4l2_subdev *sd = i2c_get_clientdata(client);

	do_tda7432_init(sd);
	v4l2_device_unregister_subdev(sd);
	kfree(to_state(sd));
	return 0;
}

static const struct i2c_device_id tda7432_id[] = {
	{ "tda7432", 0 },
	{ }
};
MODULE_DEVICE_TABLE(i2c, tda7432_id);

static struct i2c_driver tda7432_driver = {
	.driver = {
		.owner	= THIS_MODULE,
		.name	= "tda7432",
	},
	.probe		= tda7432_probe,
	.remove		= tda7432_remove,
	.id_table	= tda7432_id,
};

static __init int init_tda7432(void)
{
	return i2c_add_driver(&tda7432_driver);
}

static __exit void exit_tda7432(void)
{
	i2c_del_driver(&tda7432_driver);
}

module_init(init_tda7432);
module_exit(exit_tda7432);
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)
1da177e4 LT	23	*/
	24
	25	#include <linux/module.h>
	26	#include <linux/init.h>
	27	#include <linux/kernel.h>
1da177e4 LT	28	#include <linux/string.h>
	29	#include <linux/timer.h>
	30	#include <linux/delay.h>
	31	#include <linux/errno.h>
	32	#include <linux/slab.h>
33b687cf	33	#include <linux/videodev2.h>
1da177e4	34	#include <linux/i2c.h>
1da177e4	35
d531305a	36	#include <media/v4l2-device.h>
35ea11ff	37	#include <media/v4l2-ioctl.h>
fa3fcceb	38	#include <media/i2c-addr.h>
1da177e4 LT	39
	40	#ifndef VIDEO_AUDIO_BALANCE
	41	# define VIDEO_AUDIO_BALANCE 32
	42	#endif
	43
	44	MODULE_AUTHOR("Eric Sandeen <eric_sandeen@bigfoot.com>");
	45	MODULE_DESCRIPTION("bttv driver for the tda7432 audio processor chip");
	46	MODULE_LICENSE("GPL");
	47
	48	static int maxvol;
	49	static int loudness; /* disable loudness by default */
	50	static int debug; /* insmod parameter */
	51	module_param(debug, int, S_IRUGO \| S_IWUSR);
	52	module_param(loudness, int, S_IRUGO);
	53	MODULE_PARM_DESC(maxvol,"Set maximium volume to +20db (0), default is 0db(1)");
	54	module_param(maxvol, int, S_IRUGO \| S_IWUSR);
	55
	56
1da177e4 LT	57
	58	/* Structure of address and subaddresses for the tda7432 */
	59
	60	struct tda7432 {
d531305a	61	struct v4l2_subdev sd;
1da177e4 LT	62	int addr;
	63	int input;
	64	int volume;
	65	int muted;
	66	int bass, treble;
	67	int lf, lr, rf, rr;
	68	int loud;
1da177e4	69	};
d531305a HV	70
	71	static inline struct tda7432 to_state(struct v4l2_subdev sd)
	72	{
	73	return container_of(sd, struct tda7432, sd);
	74	}
1da177e4	75
1da177e4 LT	76	/* The TDA7432 is made by STS-Thompson
	77	* http://www.st.com
	78	* http://us.st.com/stonline/books/pdf/docs/4056.pdf
	79	*
	80	* TDA7432: I2C-bus controlled basic audio processor
	81	*
	82	* The TDA7432 controls basic audio functions like volume, balance,
	83	* and tone control (including loudness). It also has four channel
	84	* output (for front and rear). Since most vidcap cards probably
	85	* don't have 4 channel output, this driver will set front & rear
	86	* together (no independent control).
	87	*/
	88
	89	/* Subaddresses for TDA7432 */
	90
	91	#define TDA7432_IN 0x00 /* Input select */
	92	#define TDA7432_VL 0x01 /* Volume */
	93	#define TDA7432_TN 0x02 /* Bass, Treble (Tone) */
	94	#define TDA7432_LF 0x03 /* Attenuation LF (Left Front) */
	95	#define TDA7432_LR 0x04 /* Attenuation LR (Left Rear) */
	96	#define TDA7432_RF 0x05 /* Attenuation RF (Right Front) */
	97	#define TDA7432_RR 0x06 /* Attenuation RR (Right Rear) */
	98	#define TDA7432_LD 0x07 /* Loudness */
	99
	100
	101	/* Masks for bits in TDA7432 subaddresses */
	102
	103	/* Many of these not used - just for documentation */
	104
	105	/* Subaddress 0x00 - Input selection and bass control */
	106
	107	/* Bits 0,1,2 control input:
	108	* 0x00 - Stereo input
	109	* 0x02 - Mono input
	110	* 0x03 - Mute (Using Attenuators Plays better with modules)
	111	* Mono probably isn't used - I'm guessing only the stereo
	112	* input is connected on most cards, so we'll set it to stereo.
	113	*
	114	* Bit 3 controls bass cut: 0/1 is non-symmetric/symmetric bass cut
	115	* Bit 4 controls bass range: 0/1 is extended/standard bass range
	116	*
	117	* Highest 3 bits not used
	118	*/
	119
	120	#define TDA7432_STEREO_IN 0
	121	#define TDA7432_MONO_IN 2 /* Probably won't be used */
	122	#define TDA7432_BASS_SYM 1 << 3
	123	#define TDA7432_BASS_NORM 1 << 4
	124
	125	/* Subaddress 0x01 - Volume */
	126
	127	/* Lower 7 bits control volume from -79dB to +32dB in 1dB steps
	128	* Recommended maximum is +20 dB
	129	*
	130	* +32dB: 0x00
	131	* +20dB: 0x0c
	132	* 0dB: 0x20
	133	* -79dB: 0x6f
	134	*
	135	* MSB (bit 7) controls loudness: 1/0 is loudness on/off
	136	*/
	137
	138	#define TDA7432_VOL_0DB 0x20
	139	#define TDA7432_LD_ON 1 << 7
140
141
142	/* Subaddress 0x02 - Tone control */
143
144	/* Bits 0,1,2 control absolute treble gain from 0dB to 14dB
145	* 0x0 is 14dB, 0x7 is 0dB
146	*
147	* Bit 3 controls treble attenuation/gain (sign)
148	* 1 = gain (+)
149	* 0 = attenuation (-)
150	*
151	* Bits 4,5,6 control absolute bass gain from 0dB to 14dB
152	* (This is only true for normal base range, set in 0x00)
153	* 0x0 << 4 is 14dB, 0x7 is 0dB
154	*
155	* Bit 7 controls bass attenuation/gain (sign)
156	* 1 << 7 = gain (+)
157	* 0 << 7 = attenuation (-)
158	*
159	* Example:
160	* 1 1 0 1 0 1 0 1 is +4dB bass, -4dB treble
161	*/
162
163	#define TDA7432_TREBLE_0DB 0xf
164	#define TDA7432_TREBLE 7
165	#define TDA7432_TREBLE_GAIN 1 << 3
166	#define TDA7432_BASS_0DB 0xf
167	#define TDA7432_BASS 7 << 4
168	#define TDA7432_BASS_GAIN 1 << 7
169
170
171	/* Subaddress 0x03 - Left Front attenuation */
172	/* Subaddress 0x04 - Left Rear attenuation */
173	/* Subaddress 0x05 - Right Front attenuation */
174	/* Subaddress 0x06 - Right Rear attenuation */
175
176	/* Bits 0,1,2,3,4 control attenuation from 0dB to -37.5dB
177	* in 1.5dB steps.
178	*
179	* 0x00 is 0dB
180	* 0x1f is -37.5dB
181	*
182	* Bit 5 mutes that channel when set (1 = mute, 0 = unmute)
183	* We'll use the mute on the input, though (above)
184	* Bits 6,7 unused
185	*/
186
187	#define TDA7432_ATTEN_0DB 0x00
188	#define TDA7432_MUTE 0x1 << 5
189
190
191	/* Subaddress 0x07 - Loudness Control */
192
193	/* Bits 0,1,2,3 control loudness from 0dB to -15dB in 1dB steps
194	* when bit 4 is NOT set
195	*
196	* 0x0 is 0dB
197	* 0xf is -15dB
198	*
199	* If bit 4 is set, then there is a flat attenuation according to
200	* the lower 4 bits, as above.
201	*
202	* Bits 5,6,7 unused
203	*/
204
205
206
207	/* Begin code */
208
d531305a	209	static int tda7432_write(struct v4l2_subdev *sd, int subaddr, int val)
1da177e4	210	{
d531305a	211	struct i2c_client *client = v4l2_get_subdevdata(sd);
1da177e4	212	unsigned char buffer[2];
d531305a HV	213
	214	v4l2_dbg(2, debug, sd, "In tda7432_write\n");
	215	v4l2_dbg(1, debug, sd, "Writing %d 0x%x\n", subaddr, val);
1da177e4 LT	216	buffer[0] = subaddr;
1da177e4 LT	217	buffer[1] = val;
d531305a HV	218	if (2 != i2c_master_send(client, buffer, 2)) {
d531305a HV	219	v4l2_err(sd, "I/O error, trying (write %d 0x%x)\n",
1da177e4 LT	220	subaddr, val);
	221	return -1;
	222	}
	223	return 0;
	224	}
	225
d531305a	226	static int tda7432_set(struct v4l2_subdev *sd)
1da177e4	227	{
d531305a HV	228	struct i2c_client *client = v4l2_get_subdevdata(sd);
d531305a HV	229	struct tda7432 *t = to_state(sd);
1da177e4	230	unsigned char buf[16];
1da177e4	231
d531305a	232	v4l2_dbg(1, debug, sd,
1da177e4	233	"tda7432: 7432_set(0x%02x,0x%02x,0x%02x,0x%02x,0x%02x,0x%02x,0x%02x,0x%02x,0x%02x)\n",
d531305a HV	234	t->input, t->volume, t->bass, t->treble, t->lf, t->lr,
d531305a HV	235	t->rf, t->rr, t->loud);
1da177e4 LT	236	buf[0] = TDA7432_IN;
	237	buf[1] = t->input;
	238	buf[2] = t->volume;
	239	buf[3] = t->bass;
	240	buf[4] = t->treble;
	241	buf[5] = t->lf;
	242	buf[6] = t->lr;
	243	buf[7] = t->rf;
	244	buf[8] = t->rr;
	245	buf[9] = t->loud;
d531305a HV	246	if (10 != i2c_master_send(client, buf, 10)) {
d531305a HV	247	v4l2_err(sd, "I/O error, trying tda7432_set\n");
1da177e4 LT	248	return -1;
	249	}
	250
	251	return 0;
	252	}
	253
d531305a	254	static void do_tda7432_init(struct v4l2_subdev *sd)
1da177e4	255	{
d531305a HV	256	struct tda7432 *t = to_state(sd);
	257
	258	v4l2_dbg(2, debug, sd, "In tda7432_init\n");
1da177e4 LT	259
	260	t->input = TDA7432_STEREO_IN \| /* Main (stereo) input */
	261	TDA7432_BASS_SYM \| /* Symmetric bass cut */
	262	TDA7432_BASS_NORM; /* Normal bass range */
	263	t->volume = 0x3b ; /* -27dB Volume */
	264	if (loudness) /* Turn loudness on? */
	265	t->volume \|= TDA7432_LD_ON;
7a00d45c	266	t->muted = 1;
1da177e4 LT	267	t->treble = TDA7432_TREBLE_0DB; /* 0dB Treble */
	268	t->bass = TDA7432_BASS_0DB; /* 0dB Bass */
	269	t->lf = TDA7432_ATTEN_0DB; /* 0dB attenuation */
	270	t->lr = TDA7432_ATTEN_0DB; /* 0dB attenuation */
	271	t->rf = TDA7432_ATTEN_0DB; /* 0dB attenuation */
	272	t->rr = TDA7432_ATTEN_0DB; /* 0dB attenuation */
	273	t->loud = loudness; /* insmod parameter */
	274
d531305a	275	tda7432_set(sd);
1da177e4 LT	276	}
1da177e4 LT	277
d531305a	278	static int tda7432_g_ctrl(struct v4l2_subdev sd, struct v4l2_control ctrl)
1da177e4	279	{
d531305a	280	struct tda7432 *t = to_state(sd);
1da177e4	281
7a00d45c MCC	282	switch (ctrl->id) {
	283	case V4L2_CID_AUDIO_MUTE:
	284	ctrl->value=t->muted;
	285	return 0;
	286	case V4L2_CID_AUDIO_VOLUME:
1da177e4	287	if (!maxvol){ /* max +20db */
7a00d45c	288	ctrl->value = ( 0x6f - (t->volume & 0x7F) ) * 630;
1da177e4	289	} else { /* max 0db */
7a00d45c	290	ctrl->value = ( 0x6f - (t->volume & 0x7F) ) * 829;
1da177e4	291	}
7a00d45c MCC	292	return 0;
	293	case V4L2_CID_AUDIO_BALANCE:
	294	{
1da177e4 LT	295	if ( (t->lf) < (t->rf) )
1da177e4 LT	296	/* right is attenuated, balance shifted left */
7a00d45c	297	ctrl->value = (32768 - 1057*(t->rf));
1da177e4 LT	298	else
1da177e4 LT	299	/* left is attenuated, balance shifted right */
7a00d45c MCC	300	ctrl->value = (32768 + 1057*(t->lf));
	301	return 0;
	302	}
	303	case V4L2_CID_AUDIO_BASS:
	304	{
1da177e4	305	/* Bass/treble 4 bits each */
7a00d45c MCC	306	int bass=t->bass;
	307	if(bass >= 0x8)
	308	bass = ~(bass - 0x8) & 0xf;
	309	ctrl->value = (bass << 12)+(bass << 8)+(bass << 4)+(bass);
	310	return 0;
1da177e4	311	}
7a00d45c	312	case V4L2_CID_AUDIO_TREBLE:
1da177e4	313	{
7a00d45c MCC	314	int treble=t->treble;
	315	if(treble >= 0x8)
	316	treble = ~(treble - 0x8) & 0xf;
	317	ctrl->value = (treble << 12)+(treble << 8)+(treble << 4)+(treble);
	318	return 0;
	319	}
	320	}
	321	return -EINVAL;
	322	}
1da177e4	323
d531305a	324	static int tda7432_s_ctrl(struct v4l2_subdev sd, struct v4l2_control ctrl)
7a00d45c	325	{
d531305a	326	struct tda7432 *t = to_state(sd);
1da177e4	327
7a00d45c MCC	328	switch (ctrl->id) {
	329	case V4L2_CID_AUDIO_MUTE:
	330	t->muted=ctrl->value;
	331	break;
	332	case V4L2_CID_AUDIO_VOLUME:
	333	if(!maxvol){ /* max +20db */
	334	t->volume = 0x6f - ((ctrl->value)/630);
	335	} else { /* max 0db */
	336	t->volume = 0x6f - ((ctrl->value)/829);
	337	}
1da177e4 LT	338	if (loudness) /* Turn on the loudness bit */
	339	t->volume \|= TDA7432_LD_ON;
	340
d531305a	341	tda7432_write(sd, TDA7432_VL, t->volume);
7a00d45c MCC	342	return 0;
	343	case V4L2_CID_AUDIO_BALANCE:
	344	if (ctrl->value < 32768) {
1da177e4	345	/* shifted to left, attenuate right */
7a00d45c	346	t->rr = (32768 - ctrl->value)/1057;
1da177e4 LT	347	t->rf = t->rr;
	348	t->lr = TDA7432_ATTEN_0DB;
	349	t->lf = TDA7432_ATTEN_0DB;
7a00d45c	350	} else if(ctrl->value > 32769) {
1da177e4	351	/* shifted to right, attenuate left */
7a00d45c	352	t->lf = (ctrl->value - 32768)/1057;
1da177e4 LT	353	t->lr = t->lf;
	354	t->rr = TDA7432_ATTEN_0DB;
	355	t->rf = TDA7432_ATTEN_0DB;
7a00d45c	356	} else {
1da177e4 LT	357	/* centered */
	358	t->rr = TDA7432_ATTEN_0DB;
	359	t->rf = TDA7432_ATTEN_0DB;
	360	t->lf = TDA7432_ATTEN_0DB;
	361	t->lr = TDA7432_ATTEN_0DB;
	362	}
7a00d45c MCC	363	break;
	364	case V4L2_CID_AUDIO_BASS:
	365	t->bass = ctrl->value >> 12;
	366	if(t->bass>= 0x8)
	367	t->bass = (~t->bass & 0xf) + 0x8 ;
	368
d531305a	369	tda7432_write(sd, TDA7432_TN, 0x10 \| (t->bass << 4) \| t->treble);
7a00d45c MCC	370	return 0;
	371	case V4L2_CID_AUDIO_TREBLE:
	372	t->treble= ctrl->value >> 12;
	373	if(t->treble>= 0x8)
	374	t->treble = (~t->treble & 0xf) + 0x8 ;
	375
d531305a	376	tda7432_write(sd, TDA7432_TN, 0x10 \| (t->bass << 4) \| t->treble);
7a00d45c MCC	377	return 0;
	378	default:
	379	return -EINVAL;
	380	}
1da177e4	381
7a00d45c MCC	382	/* Used for both mute and balance changes */
	383	if (t->muted)
	384	{
	385	/* Mute & update balance*/
d531305a HV	386	tda7432_write(sd, TDA7432_LF, t->lf \| TDA7432_MUTE);
	387	tda7432_write(sd, TDA7432_LR, t->lr \| TDA7432_MUTE);
	388	tda7432_write(sd, TDA7432_RF, t->rf \| TDA7432_MUTE);
	389	tda7432_write(sd, TDA7432_RR, t->rr \| TDA7432_MUTE);
7a00d45c	390	} else {
d531305a HV	391	tda7432_write(sd, TDA7432_LF, t->lf);
	392	tda7432_write(sd, TDA7432_LR, t->lr);
	393	tda7432_write(sd, TDA7432_RF, t->rf);
	394	tda7432_write(sd, TDA7432_RR, t->rr);
7a00d45c MCC	395	}
	396	return 0;
	397	}
1da177e4	398
d531305a	399	static int tda7432_queryctrl(struct v4l2_subdev sd, struct v4l2_queryctrl qc)
7a00d45c	400	{
d531305a	401	switch (qc->id) {
d531305a	402	case V4L2_CID_AUDIO_VOLUME:
10afbef1 HV	403	return v4l2_ctrl_query_fill(qc, 0, 65535, 65535 / 100, 58880);
	404	case V4L2_CID_AUDIO_MUTE:
	405	return v4l2_ctrl_query_fill(qc, 0, 1, 1, 0);
d531305a HV	406	case V4L2_CID_AUDIO_BALANCE:
	407	case V4L2_CID_AUDIO_BASS:
	408	case V4L2_CID_AUDIO_TREBLE:
10afbef1	409	return v4l2_ctrl_query_fill(qc, 0, 65535, 65535 / 100, 32768);
7a00d45c	410	}
d531305a HV	411	return -EINVAL;
d531305a HV	412	}
1da177e4	413
d531305a HV	414	/* ----------------------------------------------------------------------- */
	415
	416	static const struct v4l2_subdev_core_ops tda7432_core_ops = {
	417	.queryctrl = tda7432_queryctrl,
	418	.g_ctrl = tda7432_g_ctrl,
	419	.s_ctrl = tda7432_s_ctrl,
1da177e4 LT	420	};
1da177e4 LT	421
d531305a HV	422	static const struct v4l2_subdev_ops tda7432_ops = {
d531305a HV	423	.core = &tda7432_core_ops,
1da177e4 LT	424	};
1da177e4 LT	425
d531305a HV	426	/* ----------------------------------------------------------------------- */
	427
	428	/* *********************** *
	429	* i2c interface functions *
	430	* *********************** */
	431
	432	static int tda7432_probe(struct i2c_client *client,
	433	const struct i2c_device_id *id)
1da177e4	434	{
d531305a HV	435	struct tda7432 *t;
	436	struct v4l2_subdev *sd;
	437
	438	v4l_info(client, "chip found @ 0x%02x (%s)\n",
	439	client->addr << 1, client->adapter->name);
	440
	441	t = kzalloc(sizeof(*t), GFP_KERNEL);
	442	if (!t)
	443	return -ENOMEM;
	444	sd = &t->sd;
	445	v4l2_i2c_subdev_init(sd, client, &tda7432_ops);
	446	if (loudness < 0 \|\| loudness > 15) {
	447	v4l2_warn(sd, "loudness parameter must be between 0 and 15\n");
	448	if (loudness < 0)
	449	loudness = 0;
	450	if (loudness > 15)
	451	loudness = 15;
1da177e4 LT	452	}
1da177e4 LT	453
d531305a HV	454	do_tda7432_init(sd);
d531305a HV	455	return 0;
1da177e4 LT	456	}
1da177e4 LT	457
d531305a	458	static int tda7432_remove(struct i2c_client *client)
1da177e4	459	{
d531305a	460	struct v4l2_subdev *sd = i2c_get_clientdata(client);
1da177e4	461
d531305a HV	462	do_tda7432_init(sd);
	463	v4l2_device_unregister_subdev(sd);
	464	kfree(to_state(sd));
	465	return 0;
	466	}
1da177e4	467
d531305a HV	468	static const struct i2c_device_id tda7432_id[] = {
	469	{ "tda7432", 0 },
	470	{ }
	471	};
	472	MODULE_DEVICE_TABLE(i2c, tda7432_id);
	473
5b9f80af HV	474	static struct i2c_driver tda7432_driver = {
	475	.driver = {
	476	.owner = THIS_MODULE,
	477	.name = "tda7432",
	478	},
	479	.probe = tda7432_probe,
	480	.remove = tda7432_remove,
	481	.id_table = tda7432_id,
d531305a	482	};
5b9f80af HV	483
	484	static __init int init_tda7432(void)
	485	{
	486	return i2c_add_driver(&tda7432_driver);
	487	}
	488
	489	static __exit void exit_tda7432(void)
	490	{
	491	i2c_del_driver(&tda7432_driver);
	492	}
	493
	494	module_init(init_tda7432);
	495	module_exit(exit_tda7432);