Commit 4b9e385b authored by Petr Kulhavy's avatar Petr Kulhavy Committed by Mark Brown
Browse files

ASoC: tas571x: add biquads for TAS5717/19 



TAS571x features multiple biquad filters. Their coefficients
are stored in 20-byte registers, which cannot be supported by
regmap.

This patch adds read and write functions for multi-word (32-bit) register
access and mixer controls for the biquads. The multi-word read/write
functions can be used in the future to implement other features like DRC or
output mixer.

Signed-off-by: default avatarPetr Kulhavy <brain@jikos.cz>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent dca3fed8

sound/soc/codecs/tas571x.c

+170 −0
Original line number Diff line number Diff line
@@ -28,6 +28,7 @@ 
#include <sound/pcm_params.h>

#include <sound/soc.h>

#include <sound/tlv.h>

#include <asm/unaligned.h>



#include "tas571x.h"
@@ -135,6 +136,129 @@ static int tas571x_reg_read(void *context, unsigned int reg, 
	return 0;

}



/*

 * register write for 8- and 20-byte registers

 */

static int tas571x_reg_write_multiword(struct i2c_client *client,

		unsigned int reg, const long values[], size_t len)

{

	size_t i;

	uint8_t *buf, *p;

	int ret;

	size_t send_size = 1 + len * sizeof(uint32_t);



	buf = kzalloc(send_size, GFP_KERNEL | GFP_DMA);

	if (!buf)

		return -ENOMEM;

	buf[0] = reg;



	for (i = 0, p = buf + 1; i < len; i++, p += sizeof(uint32_t))

		put_unaligned_be32(values[i], p);



	ret = i2c_master_send(client, buf, send_size);



	kfree(buf);



	if (ret == send_size)

		return 0;

	else if (ret < 0)

		return ret;

	else

		return -EIO;

}



/*

 * register read for 8- and 20-byte registers

 */

static int tas571x_reg_read_multiword(struct i2c_client *client,

		unsigned int reg, long values[], size_t len)

{

	unsigned int i;

	uint8_t send_buf;

	uint8_t *recv_buf, *p;

	struct i2c_msg msgs[2];

	unsigned int recv_size = len * sizeof(uint32_t);

	int ret;



	recv_buf = kzalloc(recv_size, GFP_KERNEL | GFP_DMA);

	if (!recv_buf)

		return -ENOMEM;



	send_buf = reg;



	msgs[0].addr = client->addr;

	msgs[0].len = sizeof(send_buf);

	msgs[0].buf = &send_buf;

	msgs[0].flags = 0;



	msgs[1].addr = client->addr;

	msgs[1].len = recv_size;

	msgs[1].buf = recv_buf;

	msgs[1].flags = I2C_M_RD;



	ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));

	if (ret < 0)

		goto err_ret;

	else if (ret != ARRAY_SIZE(msgs)) {

		ret = -EIO;

		goto err_ret;

	}



	for (i = 0, p = recv_buf; i < len; i++, p += sizeof(uint32_t))

		values[i] = get_unaligned_be32(p);



err_ret:

	kfree(recv_buf);

	return ret;

}



/*

 * Integer array controls for setting biquad, mixer, DRC coefficients.

 * According to the datasheet each coefficient is effectively 26bits,

 * i.e. stored as 32bits, where bits [31:26] are ignored.

 * TI's TAS57xx Graphical Development Environment tool however produces

 * coefficients with more than 26 bits. For this reason we allow values

 * in the full 32-bits reange.

 * The coefficients are ordered as given in the TAS571x data sheet:

 * b0, b1, b2, a1, a2

 */



static int tas571x_coefficient_info(struct snd_kcontrol *kcontrol,

				   struct snd_ctl_elem_info *uinfo)

{

	int numcoef = kcontrol->private_value >> 16;



	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;

	uinfo->count = numcoef;

	uinfo->value.integer.min = 0;

	uinfo->value.integer.max = 0xffffffff;

	return 0;

}



static int tas571x_coefficient_get(struct snd_kcontrol *kcontrol,

				  struct snd_ctl_elem_value *ucontrol)

{

	struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);

	struct i2c_client *i2c = to_i2c_client(codec->dev);

	int numcoef = kcontrol->private_value >> 16;

	int index = kcontrol->private_value & 0xffff;



	return tas571x_reg_read_multiword(i2c, index,

		ucontrol->value.integer.value, numcoef);

}



static int tas571x_coefficient_put(struct snd_kcontrol *kcontrol,

				  struct snd_ctl_elem_value *ucontrol)

{

	struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);

	struct i2c_client *i2c = to_i2c_client(codec->dev);

	int numcoef = kcontrol->private_value >> 16;

	int index = kcontrol->private_value & 0xffff;



	return tas571x_reg_write_multiword(i2c, index,

		ucontrol->value.integer.value, numcoef);

}



static int tas571x_set_dai_fmt(struct snd_soc_dai *dai, unsigned int format)

{

	struct tas571x_private *priv = snd_soc_codec_get_drvdata(dai->codec);
@@ -241,6 +365,15 @@ static const struct snd_soc_dai_ops tas571x_dai_ops = { 
	.digital_mute	= tas571x_mute,

};





#define BIQUAD_COEFS(xname, reg) \

{	.iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, \

	.info = tas571x_coefficient_info, \

	.get = tas571x_coefficient_get,\

	.put = tas571x_coefficient_put, \

	.access = SNDRV_CTL_ELEM_ACCESS_READWRITE, \

	.private_value = reg | (5 << 16) }



static const char *const tas5711_supply_names[] = {

	"AVDD",

	"DVDD",
@@ -340,6 +473,43 @@ static const struct snd_kcontrol_new tas5717_controls[] = { 
		   TAS571X_SOFT_MUTE_REG,

		   TAS571X_SOFT_MUTE_CH1_SHIFT, TAS571X_SOFT_MUTE_CH2_SHIFT,

		   1, 1),



	/*

	 * The biquads are named according to the register names.

	 * Please note that TI's TAS57xx Graphical Development Environment

	 * tool names them different.

	 */

	BIQUAD_COEFS("CH1 - Biquad 0", TAS5717_CH1_BQ0_REG),

	BIQUAD_COEFS("CH1 - Biquad 1", TAS5717_CH1_BQ1_REG),

	BIQUAD_COEFS("CH1 - Biquad 2", TAS5717_CH1_BQ2_REG),

	BIQUAD_COEFS("CH1 - Biquad 3", TAS5717_CH1_BQ3_REG),

	BIQUAD_COEFS("CH1 - Biquad 4", TAS5717_CH1_BQ4_REG),

	BIQUAD_COEFS("CH1 - Biquad 5", TAS5717_CH1_BQ5_REG),

	BIQUAD_COEFS("CH1 - Biquad 6", TAS5717_CH1_BQ6_REG),

	BIQUAD_COEFS("CH1 - Biquad 7", TAS5717_CH1_BQ7_REG),

	BIQUAD_COEFS("CH1 - Biquad 8", TAS5717_CH1_BQ8_REG),

	BIQUAD_COEFS("CH1 - Biquad 9", TAS5717_CH1_BQ9_REG),

	BIQUAD_COEFS("CH1 - Biquad 10", TAS5717_CH1_BQ10_REG),

	BIQUAD_COEFS("CH1 - Biquad 11", TAS5717_CH1_BQ11_REG),



	BIQUAD_COEFS("CH2 - Biquad 0", TAS5717_CH2_BQ0_REG),

	BIQUAD_COEFS("CH2 - Biquad 1", TAS5717_CH2_BQ1_REG),

	BIQUAD_COEFS("CH2 - Biquad 2", TAS5717_CH2_BQ2_REG),

	BIQUAD_COEFS("CH2 - Biquad 3", TAS5717_CH2_BQ3_REG),

	BIQUAD_COEFS("CH2 - Biquad 4", TAS5717_CH2_BQ4_REG),

	BIQUAD_COEFS("CH2 - Biquad 5", TAS5717_CH2_BQ5_REG),

	BIQUAD_COEFS("CH2 - Biquad 6", TAS5717_CH2_BQ6_REG),

	BIQUAD_COEFS("CH2 - Biquad 7", TAS5717_CH2_BQ7_REG),

	BIQUAD_COEFS("CH2 - Biquad 8", TAS5717_CH2_BQ8_REG),

	BIQUAD_COEFS("CH2 - Biquad 9", TAS5717_CH2_BQ9_REG),

	BIQUAD_COEFS("CH2 - Biquad 10", TAS5717_CH2_BQ10_REG),

	BIQUAD_COEFS("CH2 - Biquad 11", TAS5717_CH2_BQ11_REG),



	BIQUAD_COEFS("CH3 - Biquad 0", TAS5717_CH3_BQ0_REG),

	BIQUAD_COEFS("CH3 - Biquad 1", TAS5717_CH3_BQ1_REG),



	BIQUAD_COEFS("CH4 - Biquad 0", TAS5717_CH4_BQ0_REG),

	BIQUAD_COEFS("CH4 - Biquad 1", TAS5717_CH4_BQ1_REG),

};



static const struct reg_default tas5717_reg_defaults[] = {

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