static int wm8728_set_bias_level(struct snd_soc_component *component,
enum snd_soc_bias_level level)
{
struct wm8728_priv *wm8728 = snd_soc_component_get_drvdata(component);
u16 reg;
switch (level) {
case SND_SOC_BIAS_ON:
case SND_SOC_BIAS_PREPARE:
case SND_SOC_BIAS_STANDBY:
if (snd_soc_component_get_bias_level(component) == SND_SOC_BIAS_OFF) {
/* Power everything up... */
reg = snd_soc_component_read32(component, WM8728_DACCTL);
snd_soc_component_write(component, WM8728_DACCTL, reg & ~0x4);
/* ..then sync in the register cache. */
regcache_sync(wm8728->regmap);
}
break;
case SND_SOC_BIAS_OFF:
reg = snd_soc_component_read32(component, WM8728_DACCTL);
snd_soc_component_write(component, WM8728_DACCTL, reg | 0x4);
break;
}
return 0;
}
static int wm8711_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
struct snd_soc_component *component = dai->component;
struct wm8711_priv *wm8711 = snd_soc_component_get_drvdata(component);
u16 iface = snd_soc_component_read32(component, WM8711_IFACE) & 0xfff3;
int i = get_coeff(wm8711->sysclk, params_rate(params));
u16 srate = (coeff_div[i].sr << 2) |
(coeff_div[i].bosr << 1) | coeff_div[i].usb;
snd_soc_component_write(component, WM8711_SRATE, srate);
/* bit size */
switch (params_width(params)) {
case 16:
break;
case 20:
iface |= 0x0004;
break;
case 24:
iface |= 0x0008;
break;
}
snd_soc_component_write(component, WM8711_IFACE, iface);
return 0;
}
static void ak4613_dummy_write(struct work_struct *work)
{
struct ak4613_priv *priv = container_of(work,
struct ak4613_priv,
dummy_write_work);
struct snd_soc_component *component = priv->component;
unsigned int mgmt1;
unsigned int mgmt3;
/*
* PW_MGMT1 / PW_MGMT3 needs dummy write at least after 5 LR clocks
*
* Note
*
* To avoid extra delay, we want to avoid preemption here,
* but we can't. Because it uses I2C access which is using IRQ
* and sleep. Thus, delay might be more than 5 LR clocks
* see also
* ak4613_dai_trigger()
*/
udelay(5000000 / priv->rate);
snd_soc_component_read(component, PW_MGMT1, &mgmt1);
snd_soc_component_read(component, PW_MGMT3, &mgmt3);
snd_soc_component_write(component, PW_MGMT1, mgmt1);
snd_soc_component_write(component, PW_MGMT3, mgmt3);
}
static int wm8711_set_bias_level(struct snd_soc_component *component,
enum snd_soc_bias_level level)
{
struct wm8711_priv *wm8711 = snd_soc_component_get_drvdata(component);
u16 reg = snd_soc_component_read32(component, WM8711_PWR) & 0xff7f;
switch (level) {
case SND_SOC_BIAS_ON:
snd_soc_component_write(component, WM8711_PWR, reg);
break;
case SND_SOC_BIAS_PREPARE:
break;
case SND_SOC_BIAS_STANDBY:
if (snd_soc_component_get_bias_level(component) == SND_SOC_BIAS_OFF)
regcache_sync(wm8711->regmap);
snd_soc_component_write(component, WM8711_PWR, reg | 0x0040);
break;
case SND_SOC_BIAS_OFF:
snd_soc_component_write(component, WM8711_ACTIVE, 0x0);
snd_soc_component_write(component, WM8711_PWR, 0xffff);
break;
}
return 0;
}
static int wm8728_mute(struct snd_soc_dai *dai, int mute)
{
struct snd_soc_component *component = dai->component;
u16 mute_reg = snd_soc_component_read32(component, WM8728_DACCTL);
if (mute)
snd_soc_component_write(component, WM8728_DACCTL, mute_reg | 1);
else
snd_soc_component_write(component, WM8728_DACCTL, mute_reg & ~1);
return 0;
}
static int wm8711_mute(struct snd_soc_dai *dai, int mute)
{
struct snd_soc_component *component = dai->component;
u16 mute_reg = snd_soc_component_read32(component, WM8711_APDIGI) & 0xfff7;
if (mute)
snd_soc_component_write(component, WM8711_APDIGI, mute_reg | 0x8);
else
snd_soc_component_write(component, WM8711_APDIGI, mute_reg);
return 0;
}
static int ad1980_reset(struct snd_soc_component *component, int try_warm)
{
struct snd_ac97 *ac97 = snd_soc_component_get_drvdata(component);
unsigned int retry_cnt = 0;
int ret;
do {
ret = snd_ac97_reset(ac97, true, AD1980_VENDOR_ID,
AD1980_VENDOR_MASK);
if (ret >= 0)
return 0;
/*
* Set bit 16slot in register 74h, then every slot will has only
* 16 bits. This command is sent out in 20bit mode, in which
* case the first nibble of data is eaten by the addr. (Tag is
* always 16 bit)
*/
snd_soc_component_write(component, AC97_AD_SERIAL_CFG, 0x9900);
} while (retry_cnt++ < 10);
dev_err(component->dev, "Failed to reset: AC97 link error\n");
return -EIO;
}
static int wm8728_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
struct snd_soc_component *component = dai->component;
u16 dac = snd_soc_component_read32(component, WM8728_DACCTL);
dac &= ~0x18;
switch (params_width(params)) {
case 16:
break;
case 20:
dac |= 0x10;
break;
case 24:
dac |= 0x08;
break;
default:
return -EINVAL;
}
snd_soc_component_write(component, WM8728_DACCTL, dac);
return 0;
}
static int aic32x4_set_mfp2_gpio(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
u8 val;
u8 gpio_check;
val = snd_soc_component_read32(component, AIC32X4_DOUTCTL);
gpio_check = (val & AIC32X4_MFP_GPIO_ENABLED);
if (gpio_check != AIC32X4_MFP_GPIO_ENABLED) {
printk(KERN_ERR "%s: MFP2 is not configure as a GPIO output\n",
__func__);
return -EINVAL;
}
if (ucontrol->value.integer.value[0] == (val & AIC32X4_MFP2_GPIO_OUT_HIGH))
return 0;
if (ucontrol->value.integer.value[0])
val |= ucontrol->value.integer.value[0];
else
val &= ~AIC32X4_MFP2_GPIO_OUT_HIGH;
snd_soc_component_write(component, AIC32X4_DOUTCTL, val);
return 0;
};
static int wm8711_set_dai_fmt(struct snd_soc_dai *codec_dai,
unsigned int fmt)
{
struct snd_soc_component *component = codec_dai->component;
u16 iface = snd_soc_component_read32(component, WM8711_IFACE) & 0x000c;
/* set master/slave audio interface */
switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
case SND_SOC_DAIFMT_CBM_CFM:
iface |= 0x0040;
break;
case SND_SOC_DAIFMT_CBS_CFS:
break;
default:
return -EINVAL;
}
/* interface format */
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_I2S:
iface |= 0x0002;
break;
case SND_SOC_DAIFMT_RIGHT_J:
break;
case SND_SOC_DAIFMT_LEFT_J:
iface |= 0x0001;
break;
case SND_SOC_DAIFMT_DSP_A:
iface |= 0x0003;
break;
case SND_SOC_DAIFMT_DSP_B:
iface |= 0x0013;
break;
default:
return -EINVAL;
}
/* clock inversion */
switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
case SND_SOC_DAIFMT_NB_NF:
break;
case SND_SOC_DAIFMT_IB_IF:
iface |= 0x0090;
break;
case SND_SOC_DAIFMT_IB_NF:
iface |= 0x0080;
break;
case SND_SOC_DAIFMT_NB_IF:
iface |= 0x0010;
break;
default:
return -EINVAL;
}
/* set iface */
snd_soc_component_write(component, WM8711_IFACE, iface);
return 0;
}
static int wm9712_set_bias_level(struct snd_soc_component *component,
enum snd_soc_bias_level level)
{
switch (level) {
case SND_SOC_BIAS_ON:
case SND_SOC_BIAS_PREPARE:
break;
case SND_SOC_BIAS_STANDBY:
snd_soc_component_write(component, AC97_POWERDOWN, 0x0000);
break;
case SND_SOC_BIAS_OFF:
/* disable everything including AC link */
snd_soc_component_write(component, AC97_EXTENDED_MSTATUS, 0xffff);
snd_soc_component_write(component, AC97_POWERDOWN, 0xffff);
break;
}
return 0;
}
static int wm8711_pcm_prepare(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct snd_soc_component *component = dai->component;
/* set active */
snd_soc_component_write(component, WM8711_ACTIVE, 0x0001);
return 0;
}
static int ak4642_dai_startup(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
int is_play = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
struct snd_soc_component *component = dai->component;
if (is_play) {
/*
* start headphone output
*
* PLL, Master Mode
* Audio I/F Format :MSB justified (ADC & DAC)
* Bass Boost Level : Middle
*
* This operation came from example code of
* "ASAHI KASEI AK4642" (japanese) manual p97.
*/
snd_soc_component_write(component, L_IVC, 0x91); /* volume */
snd_soc_component_write(component, R_IVC, 0x91); /* volume */
} else {
/*
* start stereo input
*
* PLL Master Mode
* Audio I/F Format:MSB justified (ADC & DAC)
* Pre MIC AMP:+20dB
* MIC Power On
* ALC setting:Refer to Table 35
* ALC bit=“1”
*
* This operation came from example code of
* "ASAHI KASEI AK4642" (japanese) manual p94.
*/
snd_soc_component_update_bits(component, SG_SL1, PMMP | MGAIN0, PMMP | MGAIN0);
snd_soc_component_write(component, TIMER, ZTM(0x3) | WTM(0x3));
snd_soc_component_write(component, ALC_CTL1, ALC | LMTH0);
snd_soc_component_update_bits(component, PW_MGMT1, PMADL, PMADL);
snd_soc_component_update_bits(component, PW_MGMT3, PMADR, PMADR);
}
return 0;
}
static void wm8711_shutdown(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct snd_soc_component *component = dai->component;
/* deactivate */
if (!snd_soc_component_is_active(component)) {
udelay(50);
snd_soc_component_write(component, WM8711_ACTIVE, 0x0);
}
}
static int eqmode_put(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
unsigned int regpwr2, regpwr3;
unsigned int reg_eq;
if (ucontrol->value.enumerated.item[0] != 0
&& ucontrol->value.enumerated.item[0] != 1)
return -EINVAL;
reg_eq = snd_soc_component_read32(component, WM8983_EQ1_LOW_SHELF);
switch ((reg_eq & WM8983_EQ3DMODE) >> WM8983_EQ3DMODE_SHIFT) {
case 0:
if (!ucontrol->value.enumerated.item[0])
return 0;
break;
case 1:
if (ucontrol->value.enumerated.item[0])
return 0;
break;
}
regpwr2 = snd_soc_component_read32(component, WM8983_POWER_MANAGEMENT_2);
regpwr3 = snd_soc_component_read32(component, WM8983_POWER_MANAGEMENT_3);
/* disable the DACs and ADCs */
snd_soc_component_update_bits(component, WM8983_POWER_MANAGEMENT_2,
WM8983_ADCENR_MASK | WM8983_ADCENL_MASK, 0);
snd_soc_component_update_bits(component, WM8983_POWER_MANAGEMENT_3,
WM8983_DACENR_MASK | WM8983_DACENL_MASK, 0);
/* set the desired eqmode */
snd_soc_component_update_bits(component, WM8983_EQ1_LOW_SHELF,
WM8983_EQ3DMODE_MASK,
ucontrol->value.enumerated.item[0]
<< WM8983_EQ3DMODE_SHIFT);
/* restore DAC/ADC configuration */
snd_soc_component_write(component, WM8983_POWER_MANAGEMENT_2, regpwr2);
snd_soc_component_write(component, WM8983_POWER_MANAGEMENT_3, regpwr3);
return 0;
}
static int wm8900_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
struct snd_soc_component *component = dai->component;
u16 reg;
reg = snd_soc_component_read32(component, WM8900_REG_AUDIO1) & ~0x60;
switch (params_width(params)) {
case 16:
break;
case 20:
reg |= 0x20;
break;
case 24:
reg |= 0x40;
break;
case 32:
reg |= 0x60;
break;
default:
return -EINVAL;
}
snd_soc_component_write(component, WM8900_REG_AUDIO1, reg);
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
reg = snd_soc_component_read32(component, WM8900_REG_DACCTRL);
if (params_rate(params) <= 24000)
reg |= WM8900_REG_DACCTRL_DAC_SB_FILT;
else
reg &= ~WM8900_REG_DACCTRL_DAC_SB_FILT;
snd_soc_component_write(component, WM8900_REG_DACCTRL, reg);
}
return 0;
}
static int wm8770_set_bias_level(struct snd_soc_component *component,
enum snd_soc_bias_level level)
{
int ret;
struct wm8770_priv *wm8770;
wm8770 = snd_soc_component_get_drvdata(component);
switch (level) {
case SND_SOC_BIAS_ON:
break;
case SND_SOC_BIAS_PREPARE:
break;
case SND_SOC_BIAS_STANDBY:
if (snd_soc_component_get_bias_level(component) == SND_SOC_BIAS_OFF) {
ret = regulator_bulk_enable(ARRAY_SIZE(wm8770->supplies),
wm8770->supplies);
if (ret) {
dev_err(component->dev,
"Failed to enable supplies: %d\n",
ret);
return ret;
}
regcache_sync(wm8770->regmap);
/* global powerup */
snd_soc_component_write(component, WM8770_PWDNCTRL, 0);
}
break;
case SND_SOC_BIAS_OFF:
/* global powerdown */
snd_soc_component_write(component, WM8770_PWDNCTRL, 1);
regulator_bulk_disable(ARRAY_SIZE(wm8770->supplies),
wm8770->supplies);
break;
}
return 0;
}
static int ac97_aux_prepare(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct snd_soc_component *component = dai->component;
struct snd_pcm_runtime *runtime = substream->runtime;
snd_soc_component_update_bits(component, AC97_EXTENDED_STATUS, 0x1, 0x1);
snd_soc_component_update_bits(component, AC97_PCI_SID, 0x8000, 0x8000);
if (substream->stream != SNDRV_PCM_STREAM_PLAYBACK)
return -ENODEV;
return snd_soc_component_write(component, AC97_PCM_SURR_DAC_RATE, runtime->rate);
}
static int ak4642_set_bias_level(struct snd_soc_component *component,
enum snd_soc_bias_level level)
{
switch (level) {
case SND_SOC_BIAS_OFF:
snd_soc_component_write(component, PW_MGMT1, 0x00);
break;
default:
snd_soc_component_update_bits(component, PW_MGMT1, PMVCM, PMVCM);
break;
}
return 0;
}
static int cq93vc_set_bias_level(struct snd_soc_component *component,
enum snd_soc_bias_level level)
{
switch (level) {
case SND_SOC_BIAS_ON:
snd_soc_component_write(component, DAVINCI_VC_REG12,
DAVINCI_VC_REG12_POWER_ALL_ON);
break;
case SND_SOC_BIAS_PREPARE:
break;
case SND_SOC_BIAS_STANDBY:
snd_soc_component_write(component, DAVINCI_VC_REG12,
DAVINCI_VC_REG12_POWER_ALL_OFF);
break;
case SND_SOC_BIAS_OFF:
/* force all power off */
snd_soc_component_write(component, DAVINCI_VC_REG12,
DAVINCI_VC_REG12_POWER_ALL_OFF);
break;
}
return 0;
}
static int ac97_prepare(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct snd_soc_component *component = dai->component;
int reg;
struct snd_pcm_runtime *runtime = substream->runtime;
snd_soc_component_update_bits(component, AC97_EXTENDED_STATUS, 0x1, 0x1);
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
reg = AC97_PCM_FRONT_DAC_RATE;
else
reg = AC97_PCM_LR_ADC_RATE;
return snd_soc_component_write(component, reg, runtime->rate);
}
static int wm8728_set_dai_fmt(struct snd_soc_dai *codec_dai,
unsigned int fmt)
{
struct snd_soc_component *component = codec_dai->component;
u16 iface = snd_soc_component_read32(component, WM8728_IFCTL);
/* Currently only I2S is supported by the driver, though the
* hardware is more flexible.
*/
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_I2S:
iface |= 1;
break;
default:
return -EINVAL;
}
/* The hardware only support full slave mode */
switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
case SND_SOC_DAIFMT_CBS_CFS:
break;
default:
return -EINVAL;
}
switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
case SND_SOC_DAIFMT_NB_NF:
iface &= ~0x22;
break;
case SND_SOC_DAIFMT_IB_NF:
iface |= 0x20;
iface &= ~0x02;
break;
case SND_SOC_DAIFMT_NB_IF:
iface |= 0x02;
iface &= ~0x20;
break;
case SND_SOC_DAIFMT_IB_IF:
iface |= 0x22;
break;
default:
return -EINVAL;
}
snd_soc_component_write(component, WM8728_IFCTL, iface);
return 0;
}
/**
* cs4270_dai_mute - enable/disable the CS4270 external mute
* @dai: the SOC DAI
* @mute: 0 = disable mute, 1 = enable mute
*
* This function toggles the mute bits in the MUTE register. The CS4270's
* mute capability is intended for external muting circuitry, so if the
* board does not have the MUTEA or MUTEB pins connected to such circuitry,
* then this function will do nothing.
*/
static int cs4270_dai_mute(struct snd_soc_dai *dai, int mute)
{
struct snd_soc_component *component = dai->component;
struct cs4270_private *cs4270 = snd_soc_component_get_drvdata(component);
int reg6;
reg6 = snd_soc_component_read32(component, CS4270_MUTE);
if (mute)
reg6 |= CS4270_MUTE_DAC_A | CS4270_MUTE_DAC_B;
else {
reg6 &= ~(CS4270_MUTE_DAC_A | CS4270_MUTE_DAC_B);
reg6 |= cs4270->manual_mute;
}
return snd_soc_component_write(component, CS4270_MUTE, reg6);
}
static int ad1980_soc_probe(struct snd_soc_component *component)
{
struct snd_ac97 *ac97;
struct regmap *regmap;
int ret;
u16 vendor_id2;
u16 ext_status;
ac97 = snd_soc_new_ac97_component(component, 0, 0);
if (IS_ERR(ac97)) {
ret = PTR_ERR(ac97);
dev_err(component->dev, "Failed to register AC97 component: %d\n", ret);
return ret;
}
regmap = regmap_init_ac97(ac97, &ad1980_regmap_config);
if (IS_ERR(regmap)) {
ret = PTR_ERR(regmap);
goto err_free_ac97;
}
snd_soc_component_init_regmap(component, regmap);
snd_soc_component_set_drvdata(component, ac97);
ret = ad1980_reset(component, 0);
if (ret < 0)
goto reset_err;
vendor_id2 = snd_soc_component_read32(component, AC97_VENDOR_ID2);
if (vendor_id2 == 0x5374) {
dev_warn(component->dev,
"Found AD1981 - only 2/2 IN/OUT Channels supported\n");
}
/* unmute captures and playbacks volume */
snd_soc_component_write(component, AC97_MASTER, 0x0000);
snd_soc_component_write(component, AC97_PCM, 0x0000);
snd_soc_component_write(component, AC97_REC_GAIN, 0x0000);
snd_soc_component_write(component, AC97_CENTER_LFE_MASTER, 0x0000);
snd_soc_component_write(component, AC97_SURROUND_MASTER, 0x0000);
/*power on LFE/CENTER/Surround DACs*/
ext_status = snd_soc_component_read32(component, AC97_EXTENDED_STATUS);
snd_soc_component_write(component, AC97_EXTENDED_STATUS, ext_status&~0x3800);
return 0;
reset_err:
snd_soc_component_exit_regmap(component);
err_free_ac97:
snd_soc_free_ac97_component(ac97);
return ret;
}
static int cs4270_soc_suspend(struct snd_soc_component *component)
{
struct cs4270_private *cs4270 = snd_soc_component_get_drvdata(component);
int reg, ret;
reg = snd_soc_component_read32(component, CS4270_PWRCTL) | CS4270_PWRCTL_PDN_ALL;
if (reg < 0)
return reg;
ret = snd_soc_component_write(component, CS4270_PWRCTL, reg);
if (ret < 0)
return ret;
regulator_bulk_disable(ARRAY_SIZE(cs4270->supplies),
cs4270->supplies);
return 0;
}
static int cs4270_soc_resume(struct snd_soc_component *component)
{
struct cs4270_private *cs4270 = snd_soc_component_get_drvdata(component);
int reg, ret;
ret = regulator_bulk_enable(ARRAY_SIZE(cs4270->supplies),
cs4270->supplies);
if (ret != 0)
return ret;
/* In case the device was put to hard reset during sleep, we need to
* wait 500ns here before any I2C communication. */
ndelay(500);
/* first restore the entire register cache ... */
regcache_sync(cs4270->regmap);
/* ... then disable the power-down bits */
reg = snd_soc_component_read32(component, CS4270_PWRCTL);
reg &= ~CS4270_PWRCTL_PDN_ALL;
return snd_soc_component_write(component, CS4270_PWRCTL, reg);
}
static int ak4642_set_mcko(struct snd_soc_component *component,
u32 frequency)
{
static const u32 fs_list[] = {
[0] = 8000,
[1] = 12000,
[2] = 16000,
[3] = 24000,
[4] = 7350,
[5] = 11025,
[6] = 14700,
[7] = 22050,
[10] = 32000,
[11] = 48000,
[14] = 29400,
[15] = 44100,
};
static const u32 ps_list[] = {
[0] = 256,
[1] = 128,
[2] = 64,
[3] = 32
};
int ps, fs;
for (ps = 0; ps < ARRAY_SIZE(ps_list); ps++) {
for (fs = 0; fs < ARRAY_SIZE(fs_list); fs++) {
if (frequency == ps_list[ps] * fs_list[fs]) {
snd_soc_component_write(component, MD_CTL2,
PSs(ps) | FSs(fs));
return 0;
}
}
}
return 0;
}
static int ak4613_set_bias_level(struct snd_soc_component *component,
enum snd_soc_bias_level level)
{
u8 mgmt1 = 0;
switch (level) {
case SND_SOC_BIAS_ON:
mgmt1 |= RSTN;
/* fall through */
case SND_SOC_BIAS_PREPARE:
mgmt1 |= PMADC | PMDAC;
/* fall through */
case SND_SOC_BIAS_STANDBY:
mgmt1 |= PMVR;
/* fall through */
case SND_SOC_BIAS_OFF:
default:
break;
}
snd_soc_component_write(component, PW_MGMT1, mgmt1);
return 0;
}
static int wm8770_reset(struct snd_soc_component *component)
{
return snd_soc_component_write(component, WM8770_RESET, 0);
}
/**
* cs4270_hw_params - program the CS4270 with the given hardware parameters.
* @substream: the audio stream
* @params: the hardware parameters to set
* @dai: the SOC DAI (ignored)
*
* This function programs the hardware with the values provided.
* Specifically, the sample rate and the data format.
*
* The .ops functions are used to provide board-specific data, like input
* frequencies, to this driver. This function takes that information,
* combines it with the hardware parameters provided, and programs the
* hardware accordingly.
*/
static int cs4270_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
struct snd_soc_component *component = dai->component;
struct cs4270_private *cs4270 = snd_soc_component_get_drvdata(component);
int ret;
unsigned int i;
unsigned int rate;
unsigned int ratio;
int reg;
/* Figure out which MCLK/LRCK ratio to use */
rate = params_rate(params); /* Sampling rate, in Hz */
ratio = cs4270->mclk / rate; /* MCLK/LRCK ratio */
for (i = 0; i < NUM_MCLK_RATIOS; i++) {
if (cs4270_mode_ratios[i].ratio == ratio)
break;
}
if (i == NUM_MCLK_RATIOS) {
/* We did not find a matching ratio */
dev_err(component->dev, "could not find matching ratio\n");
return -EINVAL;
}
/* Set the sample rate */
reg = snd_soc_component_read32(component, CS4270_MODE);
reg &= ~(CS4270_MODE_SPEED_MASK | CS4270_MODE_DIV_MASK);
reg |= cs4270_mode_ratios[i].mclk;
if (cs4270->slave_mode)
reg |= CS4270_MODE_SLAVE;
else
reg |= cs4270_mode_ratios[i].speed_mode;
ret = snd_soc_component_write(component, CS4270_MODE, reg);
if (ret < 0) {
dev_err(component->dev, "i2c write failed\n");
return ret;
}
/* Set the DAI format */
reg = snd_soc_component_read32(component, CS4270_FORMAT);
reg &= ~(CS4270_FORMAT_DAC_MASK | CS4270_FORMAT_ADC_MASK);
switch (cs4270->mode) {
case SND_SOC_DAIFMT_I2S:
reg |= CS4270_FORMAT_DAC_I2S | CS4270_FORMAT_ADC_I2S;
break;
case SND_SOC_DAIFMT_LEFT_J:
reg |= CS4270_FORMAT_DAC_LJ | CS4270_FORMAT_ADC_LJ;
break;
default:
dev_err(component->dev, "unknown dai format\n");
return -EINVAL;
}
ret = snd_soc_component_write(component, CS4270_FORMAT, reg);
if (ret < 0) {
dev_err(component->dev, "i2c write failed\n");
return ret;
}
return ret;
}