ASoC: TWL4030: Add helper function for output gain controls

}

/*

 * Some of the gain controls in TWL (mostly those which are associated with

 * the outputs) are implemented in an interesting way:

 * 0x0 : Power down (mute)

 * 0x1 : 6dB

 * 0x2 : 0 dB

 * 0x3 : -6 dB

 * Inverting not going to help with these.

 * Custom volsw and volsw_2r get/put functions to handle these gain bits.

 */

#define SOC_DOUBLE_TLV_TWL4030(xname, xreg, shift_left, shift_right, xmax,\

			       xinvert, tlv_array) \

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

	.access = SNDRV_CTL_ELEM_ACCESS_TLV_READ |\

		 SNDRV_CTL_ELEM_ACCESS_READWRITE,\

	.tlv.p = (tlv_array), \

	.info = snd_soc_info_volsw, \

	.get = snd_soc_get_volsw_twl4030, \

	.put = snd_soc_put_volsw_twl4030, \

	.private_value = (unsigned long)&(struct soc_mixer_control) \

		{.reg = xreg, .shift = shift_left, .rshift = shift_right,\

		 .max = xmax, .invert = xinvert} }

#define SOC_DOUBLE_R_TLV_TWL4030(xname, reg_left, reg_right, xshift, xmax,\

				 xinvert, tlv_array) \

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

	.access = SNDRV_CTL_ELEM_ACCESS_TLV_READ |\

		 SNDRV_CTL_ELEM_ACCESS_READWRITE,\

	.tlv.p = (tlv_array), \

	.info = snd_soc_info_volsw_2r, \

	.get = snd_soc_get_volsw_r2_twl4030,\

	.put = snd_soc_put_volsw_r2_twl4030, \

	.private_value = (unsigned long)&(struct soc_mixer_control) \

		{.reg = reg_left, .rreg = reg_right, .shift = xshift, \

		.max = xmax, .invert = xinvert} }

#define SOC_SINGLE_TLV_TWL4030(xname, xreg, xshift, xmax, xinvert, tlv_array) \

	SOC_DOUBLE_TLV_TWL4030(xname, xreg, xshift, xshift, xmax, \

			       xinvert, tlv_array)

static int snd_soc_get_volsw_twl4030(struct snd_kcontrol *kcontrol,

	struct snd_ctl_elem_value *ucontrol)

{

	struct soc_mixer_control *mc =

		(struct soc_mixer_control *)kcontrol->private_value;

	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);

	unsigned int reg = mc->reg;

	unsigned int shift = mc->shift;

	unsigned int rshift = mc->rshift;

	int max = mc->max;

	int mask = (1 << fls(max)) - 1;

	ucontrol->value.integer.value[0] =

		(snd_soc_read(codec, reg) >> shift) & mask;

	if (ucontrol->value.integer.value[0])

		ucontrol->value.integer.value[0] =

			max + 1 - ucontrol->value.integer.value[0];

	if (shift != rshift) {

		ucontrol->value.integer.value[1] =

			(snd_soc_read(codec, reg) >> rshift) & mask;

		if (ucontrol->value.integer.value[1])

			ucontrol->value.integer.value[1] =

				max + 1 - ucontrol->value.integer.value[1];

	}

	return 0;

}

static int snd_soc_put_volsw_twl4030(struct snd_kcontrol *kcontrol,

	struct snd_ctl_elem_value *ucontrol)

{

	struct soc_mixer_control *mc =

		(struct soc_mixer_control *)kcontrol->private_value;

	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);

	unsigned int reg = mc->reg;

	unsigned int shift = mc->shift;

	unsigned int rshift = mc->rshift;

	int max = mc->max;

	int mask = (1 << fls(max)) - 1;

	unsigned short val, val2, val_mask;

	val = (ucontrol->value.integer.value[0] & mask);

	val_mask = mask << shift;

	if (val)

		val = max + 1 - val;

	val = val << shift;

	if (shift != rshift) {

		val2 = (ucontrol->value.integer.value[1] & mask);

		val_mask |= mask << rshift;

		if (val2)

			val2 = max + 1 - val2;

		val |= val2 << rshift;

	}

	return snd_soc_update_bits(codec, reg, val_mask, val);

}

static int snd_soc_get_volsw_r2_twl4030(struct snd_kcontrol *kcontrol,

	struct snd_ctl_elem_value *ucontrol)

{

	struct soc_mixer_control *mc =

		(struct soc_mixer_control *)kcontrol->private_value;

	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);

	unsigned int reg = mc->reg;

	unsigned int reg2 = mc->rreg;

	unsigned int shift = mc->shift;

	int max = mc->max;

	int mask = (1<<fls(max))-1;

	ucontrol->value.integer.value[0] =

		(snd_soc_read(codec, reg) >> shift) & mask;

	ucontrol->value.integer.value[1] =

		(snd_soc_read(codec, reg2) >> shift) & mask;

	if (ucontrol->value.integer.value[0])

		ucontrol->value.integer.value[0] =

			max + 1 - ucontrol->value.integer.value[0];

	if (ucontrol->value.integer.value[1])

		ucontrol->value.integer.value[1] =

			max + 1 - ucontrol->value.integer.value[1];

	return 0;

}

static int snd_soc_put_volsw_r2_twl4030(struct snd_kcontrol *kcontrol,

	struct snd_ctl_elem_value *ucontrol)

{

	struct soc_mixer_control *mc =

		(struct soc_mixer_control *)kcontrol->private_value;

	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);

	unsigned int reg = mc->reg;

	unsigned int reg2 = mc->rreg;

	unsigned int shift = mc->shift;

	int max = mc->max;

	int mask = (1 << fls(max)) - 1;

	int err;

	unsigned short val, val2, val_mask;

	val_mask = mask << shift;

	val = (ucontrol->value.integer.value[0] & mask);

	val2 = (ucontrol->value.integer.value[1] & mask);

	if (val)

		val = max + 1 - val;

	if (val2)

		val2 = max + 1 - val2;

	val = val << shift;

	val2 = val2 << shift;

	err = snd_soc_update_bits(codec, reg, val_mask, val);

	if (err < 0)

		return err;

	err = snd_soc_update_bits(codec, reg2, val_mask, val2);

	return err;

}

/*

 * FGAIN volume control:

 * from -62 to 0 dB in 1 dB steps (mute instead of -63 dB)