[linux-2.6-block.git] / drivers / media / i2c / 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@kernel.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/v4l2-ctrls.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_PARM_DESC(debug, "Set debugging level from 0 to 3. Default is off(0).");
module_param(loudness, int, S_IRUGO);
MODULE_PARM_DESC(loudness, "Turn loudness on(1) else off(0). Default is off(0).");
module_param(maxvol, int, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(maxvol, "Set maximium volume to +20dB(0) else +0dB(1). Default is +20dB(0).");


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

struct tda7432 {
	struct v4l2_subdev sd;
	struct v4l2_ctrl_handler hdl;
	struct {
		/* bass/treble cluster */
		struct v4l2_ctrl *bass;
		struct v4l2_ctrl *treble;
	};
	struct {
		/* mute/balance cluster */
		struct v4l2_ctrl *mute;
		struct v4l2_ctrl *balance;
	};
};

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

static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl)
{
	return &container_of(ctrl->handler, struct tda7432, hdl)->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);
	unsigned char buf[16];

	buf[0]  = TDA7432_IN;
	buf[1]  = TDA7432_STEREO_IN |  /* Main (stereo) input   */
		  TDA7432_BASS_SYM  |  /* Symmetric bass cut    */
		  TDA7432_BASS_NORM;   /* Normal bass range     */
	buf[2]  = 0x3b;
	if (loudness)			 /* Turn loudness on?     */
		buf[2] |= TDA7432_LD_ON;
	buf[3]  = TDA7432_TREBLE_0DB | (TDA7432_BASS_0DB << 4);
	buf[4]  = TDA7432_ATTEN_0DB;
	buf[5]  = TDA7432_ATTEN_0DB;
	buf[6]  = TDA7432_ATTEN_0DB;
	buf[7]  = TDA7432_ATTEN_0DB;
	buf[8]  = loudness;
	if (9 != i2c_master_send(client, buf, 9)) {
		v4l2_err(sd, "I/O error, trying tda7432_set\n");
		return -1;
	}

	return 0;
}

static int tda7432_log_status(struct v4l2_subdev *sd)
{
	struct tda7432 *state = to_state(sd);

	v4l2_ctrl_handler_log_status(&state->hdl, sd->name);
	return 0;
}

static int tda7432_s_ctrl(struct v4l2_ctrl *ctrl)
{
	struct v4l2_subdev *sd = to_sd(ctrl);
	struct tda7432 *t = to_state(sd);
	u8 bass, treble, volume;
	u8 lf, lr, rf, rr;

	switch (ctrl->id) {
	case V4L2_CID_AUDIO_MUTE:
		if (t->balance->val < 0) {
			/* shifted to left, attenuate right */
			rr = rf = -t->balance->val;
			lr = lf = TDA7432_ATTEN_0DB;
		} else if (t->balance->val > 0) {
			/* shifted to right, attenuate left */
			rr = rf = TDA7432_ATTEN_0DB;
			lr = lf = t->balance->val;
		} else {
			/* centered */
			rr = rf = TDA7432_ATTEN_0DB;
			lr = lf = TDA7432_ATTEN_0DB;
		}
		if (t->mute->val) {
			lf |= TDA7432_MUTE;
			lr |= TDA7432_MUTE;
			rf |= TDA7432_MUTE;
			rr |= TDA7432_MUTE;
		}
		/* Mute & update balance*/
		tda7432_write(sd, TDA7432_LF, lf);
		tda7432_write(sd, TDA7432_LR, lr);
		tda7432_write(sd, TDA7432_RF, rf);
		tda7432_write(sd, TDA7432_RR, rr);
		return 0;
	case V4L2_CID_AUDIO_VOLUME:
		volume = 0x6f - ctrl->val;
		if (loudness)		/* Turn on the loudness bit */
			volume |= TDA7432_LD_ON;

		tda7432_write(sd, TDA7432_VL, volume);
		return 0;
	case V4L2_CID_AUDIO_BASS:
		bass = t->bass->val;
		treble = t->treble->val;
		if (bass >= 0x8)
			bass = 14 - (bass - 8);
		if (treble >= 0x8)
			treble = 14 - (treble - 8);

		tda7432_write(sd, TDA7432_TN, 0x10 | (bass << 4) | treble);
		return 0;
	}
	return -EINVAL;
}

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

static const struct v4l2_ctrl_ops tda7432_ctrl_ops = {
	.s_ctrl = tda7432_s_ctrl,
};

static const struct v4l2_subdev_core_ops tda7432_core_ops = {
	.log_status = tda7432_log_status,
};

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 = devm_kzalloc(&client->dev, sizeof(*t), GFP_KERNEL);
	if (!t)
		return -ENOMEM;
	sd = &t->sd;
	v4l2_i2c_subdev_init(sd, client, &tda7432_ops);
	v4l2_ctrl_handler_init(&t->hdl, 5);
	v4l2_ctrl_new_std(&t->hdl, &tda7432_ctrl_ops,
		V4L2_CID_AUDIO_VOLUME, 0, maxvol ? 0x68 : 0x4f, 1, maxvol ? 0x5d : 0x47);
	t->mute = v4l2_ctrl_new_std(&t->hdl, &tda7432_ctrl_ops,
		V4L2_CID_AUDIO_MUTE, 0, 1, 1, 0);
	t->balance = v4l2_ctrl_new_std(&t->hdl, &tda7432_ctrl_ops,
		V4L2_CID_AUDIO_BALANCE, -31, 31, 1, 0);
	t->bass = v4l2_ctrl_new_std(&t->hdl, &tda7432_ctrl_ops,
		V4L2_CID_AUDIO_BASS, 0, 14, 1, 7);
	t->treble = v4l2_ctrl_new_std(&t->hdl, &tda7432_ctrl_ops,
		V4L2_CID_AUDIO_TREBLE, 0, 14, 1, 7);
	sd->ctrl_handler = &t->hdl;
	if (t->hdl.error) {
		int err = t->hdl.error;

		v4l2_ctrl_handler_free(&t->hdl);
		return err;
	}
	v4l2_ctrl_cluster(2, &t->bass);
	v4l2_ctrl_cluster(2, &t->mute);
	v4l2_ctrl_handler_setup(&t->hdl);
	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;
	}

	tda7432_set(sd);
	return 0;
}

static int tda7432_remove(struct i2c_client *client)
{
	struct v4l2_subdev *sd = i2c_get_clientdata(client);
	struct tda7432 *t = to_state(sd);

	tda7432_set(sd);
	v4l2_device_unregister_subdev(sd);
	v4l2_ctrl_handler_free(&t->hdl);
	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 = {
		.name	= "tda7432",
	},
	.probe		= tda7432_probe,
	.remove		= tda7432_remove,
	.id_table	= tda7432_id,
};

module_i2c_driver(tda7432_driver);
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>
32590819	11	* Copyright (c) 2006 Mauro Carvalho Chehab <mchehab@kernel.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>
5d478e0d	38	#include <media/v4l2-ctrls.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);
7ce338d9	52	MODULE_PARM_DESC(debug, "Set debugging level from 0 to 3. Default is off(0).");
1da177e4	53	module_param(loudness, int, S_IRUGO);
7ce338d9	54	MODULE_PARM_DESC(loudness, "Turn loudness on(1) else off(0). Default is off(0).");
1da177e4	55	module_param(maxvol, int, S_IRUGO \| S_IWUSR);
7ce338d9	56	MODULE_PARM_DESC(maxvol, "Set maximium volume to +20dB(0) else +0dB(1). Default is +20dB(0).");
1da177e4	57
1da177e4 LT	58
	59	/* Structure of address and subaddresses for the tda7432 */
	60
	61	struct tda7432 {
d531305a	62	struct v4l2_subdev sd;
5d478e0d HV	63	struct v4l2_ctrl_handler hdl;
	64	struct {
	65	/* bass/treble cluster */
	66	struct v4l2_ctrl *bass;
	67	struct v4l2_ctrl *treble;
	68	};
	69	struct {
	70	/* mute/balance cluster */
	71	struct v4l2_ctrl *mute;
	72	struct v4l2_ctrl *balance;
	73	};
1da177e4	74	};
d531305a HV	75
	76	static inline struct tda7432 to_state(struct v4l2_subdev sd)
	77	{
	78	return container_of(sd, struct tda7432, sd);
	79	}
1da177e4	80
5d478e0d HV	81	static inline struct v4l2_subdev to_sd(struct v4l2_ctrl ctrl)
	82	{
	83	return &container_of(ctrl->handler, struct tda7432, hdl)->sd;
	84	}
	85
1da177e4 LT	86	/* The TDA7432 is made by STS-Thompson
	87	* http://www.st.com
	88	* http://us.st.com/stonline/books/pdf/docs/4056.pdf
	89	*
	90	* TDA7432: I2C-bus controlled basic audio processor
	91	*
	92	* The TDA7432 controls basic audio functions like volume, balance,
	93	* and tone control (including loudness). It also has four channel
	94	* output (for front and rear). Since most vidcap cards probably
	95	* don't have 4 channel output, this driver will set front & rear
	96	* together (no independent control).
	97	*/
	98
	99	/* Subaddresses for TDA7432 */
	100
	101	#define TDA7432_IN 0x00 /* Input select */
	102	#define TDA7432_VL 0x01 /* Volume */
	103	#define TDA7432_TN 0x02 /* Bass, Treble (Tone) */
	104	#define TDA7432_LF 0x03 /* Attenuation LF (Left Front) */
	105	#define TDA7432_LR 0x04 /* Attenuation LR (Left Rear) */
	106	#define TDA7432_RF 0x05 /* Attenuation RF (Right Front) */
	107	#define TDA7432_RR 0x06 /* Attenuation RR (Right Rear) */
	108	#define TDA7432_LD 0x07 /* Loudness */
	109
	110
	111	/* Masks for bits in TDA7432 subaddresses */
	112
	113	/* Many of these not used - just for documentation */
	114
	115	/* Subaddress 0x00 - Input selection and bass control */
	116
	117	/* Bits 0,1,2 control input:
	118	* 0x00 - Stereo input
	119	* 0x02 - Mono input
	120	* 0x03 - Mute (Using Attenuators Plays better with modules)
	121	* Mono probably isn't used - I'm guessing only the stereo
	122	* input is connected on most cards, so we'll set it to stereo.
	123	*
	124	* Bit 3 controls bass cut: 0/1 is non-symmetric/symmetric bass cut
	125	* Bit 4 controls bass range: 0/1 is extended/standard bass range
	126	*
	127	* Highest 3 bits not used
	128	*/
	129
	130	#define TDA7432_STEREO_IN 0
	131	#define TDA7432_MONO_IN 2 /* Probably won't be used */
	132	#define TDA7432_BASS_SYM 1 << 3
	133	#define TDA7432_BASS_NORM 1 << 4
	134
	135	/* Subaddress 0x01 - Volume */
	136
	137	/* Lower 7 bits control volume from -79dB to +32dB in 1dB steps
	138	* Recommended maximum is +20 dB
	139	*
	140	* +32dB: 0x00
	141	* +20dB: 0x0c
	142	* 0dB: 0x20
	143	* -79dB: 0x6f
	144	*
	145	* MSB (bit 7) controls loudness: 1/0 is loudness on/off
	146	*/
	147
	148	#define TDA7432_VOL_0DB 0x20
	149	#define TDA7432_LD_ON 1 << 7
150
151
152	/* Subaddress 0x02 - Tone control */
153
154	/* Bits 0,1,2 control absolute treble gain from 0dB to 14dB
155	* 0x0 is 14dB, 0x7 is 0dB
156	*
157	* Bit 3 controls treble attenuation/gain (sign)
158	* 1 = gain (+)
159	* 0 = attenuation (-)
160	*
161	* Bits 4,5,6 control absolute bass gain from 0dB to 14dB
162	* (This is only true for normal base range, set in 0x00)
163	* 0x0 << 4 is 14dB, 0x7 is 0dB
164	*
165	* Bit 7 controls bass attenuation/gain (sign)
166	* 1 << 7 = gain (+)
167	* 0 << 7 = attenuation (-)
168	*
169	* Example:
170	* 1 1 0 1 0 1 0 1 is +4dB bass, -4dB treble
171	*/
172
173	#define TDA7432_TREBLE_0DB 0xf
174	#define TDA7432_TREBLE 7
175	#define TDA7432_TREBLE_GAIN 1 << 3
176	#define TDA7432_BASS_0DB 0xf
177	#define TDA7432_BASS 7 << 4
178	#define TDA7432_BASS_GAIN 1 << 7
179
180
181	/* Subaddress 0x03 - Left Front attenuation */
182	/* Subaddress 0x04 - Left Rear attenuation */
183	/* Subaddress 0x05 - Right Front attenuation */
184	/* Subaddress 0x06 - Right Rear attenuation */
185
186	/* Bits 0,1,2,3,4 control attenuation from 0dB to -37.5dB
187	* in 1.5dB steps.
188	*
189	* 0x00 is 0dB
190	* 0x1f is -37.5dB
191	*
192	* Bit 5 mutes that channel when set (1 = mute, 0 = unmute)
193	* We'll use the mute on the input, though (above)
194	* Bits 6,7 unused
195	*/
196
197	#define TDA7432_ATTEN_0DB 0x00
198	#define TDA7432_MUTE 0x1 << 5
199
200
201	/* Subaddress 0x07 - Loudness Control */
202
203	/* Bits 0,1,2,3 control loudness from 0dB to -15dB in 1dB steps
204	* when bit 4 is NOT set
205	*
206	* 0x0 is 0dB
207	* 0xf is -15dB
208	*
209	* If bit 4 is set, then there is a flat attenuation according to
210	* the lower 4 bits, as above.
211	*
212	* Bits 5,6,7 unused
213	*/
214
215
216
217	/* Begin code */
218
d531305a	219	static int tda7432_write(struct v4l2_subdev *sd, int subaddr, int val)
1da177e4	220	{
d531305a	221	struct i2c_client *client = v4l2_get_subdevdata(sd);
1da177e4	222	unsigned char buffer[2];
d531305a HV	223
	224	v4l2_dbg(2, debug, sd, "In tda7432_write\n");
	225	v4l2_dbg(1, debug, sd, "Writing %d 0x%x\n", subaddr, val);
1da177e4 LT	226	buffer[0] = subaddr;
1da177e4 LT	227	buffer[1] = val;
d531305a HV	228	if (2 != i2c_master_send(client, buffer, 2)) {
d531305a HV	229	v4l2_err(sd, "I/O error, trying (write %d 0x%x)\n",
1da177e4 LT	230	subaddr, val);
	231	return -1;
	232	}
	233	return 0;
	234	}
	235
d531305a	236	static int tda7432_set(struct v4l2_subdev *sd)
1da177e4	237	{
d531305a	238	struct i2c_client *client = v4l2_get_subdevdata(sd);
1da177e4	239	unsigned char buf[16];
1da177e4	240
1da177e4	241	buf[0] = TDA7432_IN;
5d478e0d HV	242	buf[1] = TDA7432_STEREO_IN \| /* Main (stereo) input */
	243	TDA7432_BASS_SYM \| /* Symmetric bass cut */
	244	TDA7432_BASS_NORM; /* Normal bass range */
	245	buf[2] = 0x3b;
	246	if (loudness) /* Turn loudness on? */
	247	buf[2] \|= TDA7432_LD_ON;
	248	buf[3] = TDA7432_TREBLE_0DB \| (TDA7432_BASS_0DB << 4);
	249	buf[4] = TDA7432_ATTEN_0DB;
	250	buf[5] = TDA7432_ATTEN_0DB;
	251	buf[6] = TDA7432_ATTEN_0DB;
	252	buf[7] = TDA7432_ATTEN_0DB;
	253	buf[8] = loudness;
	254	if (9 != i2c_master_send(client, buf, 9)) {
d531305a	255	v4l2_err(sd, "I/O error, trying tda7432_set\n");
1da177e4 LT	256	return -1;
	257	}
	258
	259	return 0;
	260	}
	261
5d478e0d	262	static int tda7432_log_status(struct v4l2_subdev *sd)
1da177e4	263	{
5d478e0d	264	struct tda7432 *state = to_state(sd);
1da177e4	265
5d478e0d HV	266	v4l2_ctrl_handler_log_status(&state->hdl, sd->name);
5d478e0d HV	267	return 0;
7a00d45c	268	}
1da177e4	269
5d478e0d	270	static int tda7432_s_ctrl(struct v4l2_ctrl *ctrl)
7a00d45c	271	{
5d478e0d	272	struct v4l2_subdev *sd = to_sd(ctrl);
d531305a	273	struct tda7432 *t = to_state(sd);
5d478e0d HV	274	u8 bass, treble, volume;
5d478e0d HV	275	u8 lf, lr, rf, rr;
1da177e4	276
7a00d45c MCC	277	switch (ctrl->id) {
7a00d45c MCC	278	case V4L2_CID_AUDIO_MUTE:
5d478e0d	279	if (t->balance->val < 0) {
1da177e4	280	/* shifted to left, attenuate right */
5d478e0d HV	281	rr = rf = -t->balance->val;
	282	lr = lf = TDA7432_ATTEN_0DB;
	283	} else if (t->balance->val > 0) {
1da177e4	284	/* shifted to right, attenuate left */
5d478e0d HV	285	rr = rf = TDA7432_ATTEN_0DB;
5d478e0d HV	286	lr = lf = t->balance->val;
7a00d45c	287	} else {
1da177e4	288	/* centered */
5d478e0d HV	289	rr = rf = TDA7432_ATTEN_0DB;
5d478e0d HV	290	lr = lf = TDA7432_ATTEN_0DB;
1da177e4	291	}
5d478e0d HV	292	if (t->mute->val) {
	293	lf \|= TDA7432_MUTE;
	294	lr \|= TDA7432_MUTE;
91ba0e59	295	rf \|= TDA7432_MUTE;
5d478e0d HV	296	rr \|= TDA7432_MUTE;
	297	}
	298	/* Mute & update balance*/
	299	tda7432_write(sd, TDA7432_LF, lf);
	300	tda7432_write(sd, TDA7432_LR, lr);
	301	tda7432_write(sd, TDA7432_RF, rf);
	302	tda7432_write(sd, TDA7432_RR, rr);
7a00d45c	303	return 0;
5d478e0d HV	304	case V4L2_CID_AUDIO_VOLUME:
	305	volume = 0x6f - ctrl->val;
	306	if (loudness) /* Turn on the loudness bit */
	307	volume \|= TDA7432_LD_ON;
7a00d45c	308
5d478e0d	309	tda7432_write(sd, TDA7432_VL, volume);
7a00d45c	310	return 0;
d531305a	311	case V4L2_CID_AUDIO_BASS:
5d478e0d HV	312	bass = t->bass->val;
	313	treble = t->treble->val;
	314	if (bass >= 0x8)
	315	bass = 14 - (bass - 8);
	316	if (treble >= 0x8)
	317	treble = 14 - (treble - 8);
	318
	319	tda7432_write(sd, TDA7432_TN, 0x10 \| (bass << 4) \| treble);
	320	return 0;
7a00d45c	321	}
d531305a HV	322	return -EINVAL;
d531305a HV	323	}
1da177e4	324
d531305a HV	325	/* ----------------------------------------------------------------------- */
d531305a HV	326
5d478e0d	327	static const struct v4l2_ctrl_ops tda7432_ctrl_ops = {
d531305a	328	.s_ctrl = tda7432_s_ctrl,
1da177e4 LT	329	};
1da177e4 LT	330
5d478e0d HV	331	static const struct v4l2_subdev_core_ops tda7432_core_ops = {
5d478e0d HV	332	.log_status = tda7432_log_status,
5d478e0d HV	333	};
5d478e0d HV	334
d531305a HV	335	static const struct v4l2_subdev_ops tda7432_ops = {
d531305a HV	336	.core = &tda7432_core_ops,
1da177e4 LT	337	};
1da177e4 LT	338
d531305a HV	339	/* ----------------------------------------------------------------------- */
	340
	341	/* *********************** *
	342	* i2c interface functions *
	343	* *********************** */
	344
	345	static int tda7432_probe(struct i2c_client *client,
	346	const struct i2c_device_id *id)
1da177e4	347	{
d531305a HV	348	struct tda7432 *t;
	349	struct v4l2_subdev *sd;
	350
	351	v4l_info(client, "chip found @ 0x%02x (%s)\n",
	352	client->addr << 1, client->adapter->name);
	353
c02b211d	354	t = devm_kzalloc(&client->dev, sizeof(*t), GFP_KERNEL);
d531305a HV	355	if (!t)
	356	return -ENOMEM;
	357	sd = &t->sd;
	358	v4l2_i2c_subdev_init(sd, client, &tda7432_ops);
5d478e0d HV	359	v4l2_ctrl_handler_init(&t->hdl, 5);
	360	v4l2_ctrl_new_std(&t->hdl, &tda7432_ctrl_ops,
	361	V4L2_CID_AUDIO_VOLUME, 0, maxvol ? 0x68 : 0x4f, 1, maxvol ? 0x5d : 0x47);
	362	t->mute = v4l2_ctrl_new_std(&t->hdl, &tda7432_ctrl_ops,
	363	V4L2_CID_AUDIO_MUTE, 0, 1, 1, 0);
	364	t->balance = v4l2_ctrl_new_std(&t->hdl, &tda7432_ctrl_ops,
	365	V4L2_CID_AUDIO_BALANCE, -31, 31, 1, 0);
	366	t->bass = v4l2_ctrl_new_std(&t->hdl, &tda7432_ctrl_ops,
	367	V4L2_CID_AUDIO_BASS, 0, 14, 1, 7);
	368	t->treble = v4l2_ctrl_new_std(&t->hdl, &tda7432_ctrl_ops,
	369	V4L2_CID_AUDIO_TREBLE, 0, 14, 1, 7);
	370	sd->ctrl_handler = &t->hdl;
	371	if (t->hdl.error) {
	372	int err = t->hdl.error;
	373
	374	v4l2_ctrl_handler_free(&t->hdl);
5d478e0d HV	375	return err;
	376	}
	377	v4l2_ctrl_cluster(2, &t->bass);
	378	v4l2_ctrl_cluster(2, &t->mute);
	379	v4l2_ctrl_handler_setup(&t->hdl);
d531305a HV	380	if (loudness < 0 \|\| loudness > 15) {
	381	v4l2_warn(sd, "loudness parameter must be between 0 and 15\n");
	382	if (loudness < 0)
	383	loudness = 0;
	384	if (loudness > 15)
	385	loudness = 15;
1da177e4 LT	386	}
1da177e4 LT	387
5d478e0d	388	tda7432_set(sd);
d531305a	389	return 0;
1da177e4 LT	390	}
1da177e4 LT	391
d531305a	392	static int tda7432_remove(struct i2c_client *client)
1da177e4	393	{
d531305a	394	struct v4l2_subdev *sd = i2c_get_clientdata(client);
5d478e0d	395	struct tda7432 *t = to_state(sd);
1da177e4	396
5d478e0d	397	tda7432_set(sd);
d531305a	398	v4l2_device_unregister_subdev(sd);
5d478e0d	399	v4l2_ctrl_handler_free(&t->hdl);
d531305a HV	400	return 0;
d531305a HV	401	}
1da177e4	402
d531305a HV	403	static const struct i2c_device_id tda7432_id[] = {
	404	{ "tda7432", 0 },
	405	{ }
	406	};
	407	MODULE_DEVICE_TABLE(i2c, tda7432_id);
	408
5b9f80af HV	409	static struct i2c_driver tda7432_driver = {
5b9f80af HV	410	.driver = {
5b9f80af HV	411	.name = "tda7432",
	412	},
	413	.probe = tda7432_probe,
	414	.remove = tda7432_remove,
	415	.id_table = tda7432_id,
d531305a	416	};
5b9f80af	417
c6e8d86f	418	module_i2c_driver(tda7432_driver);