u-boot/drivers/sound/max98095.c

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// SPDX-License-Identifier: GPL-2.0+
/*
* max98095.c -- MAX98095 ALSA SoC Audio driver
*
* Copyright 2011 Maxim Integrated Products
*
* Modified for U-Boot by R. Chandrasekar (rcsekar@samsung.com)
*/
#include <common.h>
#include <audio_codec.h>
#include <dm.h>
#include <div64.h>
#include <fdtdec.h>
#include <i2c.h>
#include <sound.h>
#include <asm/gpio.h>
#include "i2s.h"
#include "max98095.h"
/* Index 0 is reserved. */
int rate_table[] = {0, 8000, 11025, 16000, 22050, 24000, 32000, 44100, 48000,
88200, 96000};
/*
* codec mclk clock divider coefficients based on sampling rate
*
* @param rate sampling rate
* @param value address of indexvalue to be stored
*
* @return 0 for success or negative error code.
*/
static int rate_value(int rate, u8 *value)
{
int i;
for (i = 1; i < ARRAY_SIZE(rate_table); i++) {
if (rate_table[i] >= rate) {
*value = i;
return 0;
}
}
*value = 1;
return -EINVAL;
}
/*
* Sets hw params for max98095
*
* @param priv max98095 information pointer
* @param rate Sampling rate
* @param bits_per_sample Bits per sample
*
* @return 0 for success or negative error code.
*/
static int max98095_hw_params(struct maxim_priv *priv,
enum en_max_audio_interface aif_id,
unsigned int rate, unsigned int bits_per_sample)
{
u8 regval;
int error;
unsigned short M98095_DAI_CLKMODE;
unsigned short M98095_DAI_FORMAT;
unsigned short M98095_DAI_FILTERS;
if (aif_id == AIF1) {
M98095_DAI_CLKMODE = M98095_027_DAI1_CLKMODE;
M98095_DAI_FORMAT = M98095_02A_DAI1_FORMAT;
M98095_DAI_FILTERS = M98095_02E_DAI1_FILTERS;
} else {
M98095_DAI_CLKMODE = M98095_031_DAI2_CLKMODE;
M98095_DAI_FORMAT = M98095_034_DAI2_FORMAT;
M98095_DAI_FILTERS = M98095_038_DAI2_FILTERS;
}
switch (bits_per_sample) {
case 16:
error = maxim_bic_or(priv, M98095_DAI_FORMAT, M98095_DAI_WS, 0);
break;
case 24:
error = maxim_bic_or(priv, M98095_DAI_FORMAT, M98095_DAI_WS,
M98095_DAI_WS);
break;
default:
debug("%s: Illegal bits per sample %d.\n",
__func__, bits_per_sample);
return -EINVAL;
}
if (rate_value(rate, &regval)) {
debug("%s: Failed to set sample rate to %d.\n",
__func__, rate);
return -EINVAL;
}
priv->rate = rate;
error |= maxim_bic_or(priv, M98095_DAI_CLKMODE, M98095_CLKMODE_MASK,
regval);
/* Update sample rate mode */
if (rate < 50000)
error |= maxim_bic_or(priv, M98095_DAI_FILTERS,
M98095_DAI_DHF, 0);
else
error |= maxim_bic_or(priv, M98095_DAI_FILTERS,
M98095_DAI_DHF, M98095_DAI_DHF);
if (error < 0) {
debug("%s: Error setting hardware params.\n", __func__);
return -EIO;
}
return 0;
}
/*
* Configures Audio interface system clock for the given frequency
*
* @param priv max98095 information
* @param freq Sampling frequency in Hz
*
* @return 0 for success or negative error code.
*/
static int max98095_set_sysclk(struct maxim_priv *priv, unsigned int freq)
{
int error = 0;
/* Requested clock frequency is already setup */
if (freq == priv->sysclk)
return 0;
/* Setup clocks for slave mode, and using the PLL
* PSCLK = 0x01 (when master clk is 10MHz to 20MHz)
* 0x02 (when master clk is 20MHz to 40MHz)..
* 0x03 (when master clk is 40MHz to 60MHz)..
*/
if ((freq >= 10000000) && (freq < 20000000)) {
error = maxim_i2c_write(priv, M98095_026_SYS_CLK, 0x10);
} else if ((freq >= 20000000) && (freq < 40000000)) {
error = maxim_i2c_write(priv, M98095_026_SYS_CLK, 0x20);
} else if ((freq >= 40000000) && (freq < 60000000)) {
error = maxim_i2c_write(priv, M98095_026_SYS_CLK, 0x30);
} else {
debug("%s: Invalid master clock frequency\n", __func__);
return -EINVAL;
}
debug("%s: Clock at %uHz\n", __func__, freq);
if (error < 0)
return -EIO;
priv->sysclk = freq;
return 0;
}
/*
* Sets Max98095 I2S format
*
* @param priv max98095 information
* @param fmt i2S format - supports a subset of the options defined
* in i2s.h.
*
* @return 0 for success or negative error code.
*/
static int max98095_set_fmt(struct maxim_priv *priv, int fmt,
enum en_max_audio_interface aif_id)
{
u8 regval = 0;
int error = 0;
unsigned short M98095_DAI_CLKCFG_HI;
unsigned short M98095_DAI_CLKCFG_LO;
unsigned short M98095_DAI_FORMAT;
unsigned short M98095_DAI_CLOCK;
if (fmt == priv->fmt)
return 0;
priv->fmt = fmt;
if (aif_id == AIF1) {
M98095_DAI_CLKCFG_HI = M98095_028_DAI1_CLKCFG_HI;
M98095_DAI_CLKCFG_LO = M98095_029_DAI1_CLKCFG_LO;
M98095_DAI_FORMAT = M98095_02A_DAI1_FORMAT;
M98095_DAI_CLOCK = M98095_02B_DAI1_CLOCK;
} else {
M98095_DAI_CLKCFG_HI = M98095_032_DAI2_CLKCFG_HI;
M98095_DAI_CLKCFG_LO = M98095_033_DAI2_CLKCFG_LO;
M98095_DAI_FORMAT = M98095_034_DAI2_FORMAT;
M98095_DAI_CLOCK = M98095_035_DAI2_CLOCK;
}
switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
case SND_SOC_DAIFMT_CBS_CFS:
/* Slave mode PLL */
error |= maxim_i2c_write(priv, M98095_DAI_CLKCFG_HI, 0x80);
error |= maxim_i2c_write(priv, M98095_DAI_CLKCFG_LO, 0x00);
break;
case SND_SOC_DAIFMT_CBM_CFM:
/* Set to master mode */
regval |= M98095_DAI_MAS;
break;
case SND_SOC_DAIFMT_CBS_CFM:
case SND_SOC_DAIFMT_CBM_CFS:
default:
debug("%s: Clock mode unsupported\n", __func__);
return -EINVAL;
}
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_I2S:
regval |= M98095_DAI_DLY;
break;
case SND_SOC_DAIFMT_LEFT_J:
break;
default:
debug("%s: Unrecognized format.\n", __func__);
return -EINVAL;
}
switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
case SND_SOC_DAIFMT_NB_NF:
break;
case SND_SOC_DAIFMT_NB_IF:
regval |= M98095_DAI_WCI;
break;
case SND_SOC_DAIFMT_IB_NF:
regval |= M98095_DAI_BCI;
break;
case SND_SOC_DAIFMT_IB_IF:
regval |= M98095_DAI_BCI | M98095_DAI_WCI;
break;
default:
debug("%s: Unrecognized inversion settings.\n", __func__);
return -EINVAL;
}
error |= maxim_bic_or(priv, M98095_DAI_FORMAT,
M98095_DAI_MAS | M98095_DAI_DLY |
M98095_DAI_BCI | M98095_DAI_WCI, regval);
error |= maxim_i2c_write(priv, M98095_DAI_CLOCK, M98095_DAI_BSEL64);
if (error < 0) {
debug("%s: Error setting i2s format.\n", __func__);
return -EIO;
}
return 0;
}
/*
* resets the audio codec
*
* @param priv Private data for driver
* @return 0 for success or negative error code.
*/
static int max98095_reset(struct maxim_priv *priv)
{
int i, ret;
/*
* Gracefully reset the DSP core and the codec hardware in a proper
* sequence.
*/
ret = maxim_i2c_write(priv, M98095_00F_HOST_CFG, 0);
if (ret != 0) {
debug("%s: Failed to reset DSP: %d\n", __func__, ret);
return ret;
}
ret = maxim_i2c_write(priv, M98095_097_PWR_SYS, 0);
if (ret != 0) {
debug("%s: Failed to reset codec: %d\n", __func__, ret);
return ret;
}
/*
* Reset to hardware default for registers, as there is not a soft
* reset hardware control register.
*/
for (i = M98095_010_HOST_INT_CFG; i < M98095_REG_MAX_CACHED; i++) {
ret = maxim_i2c_write(priv, i, 0);
if (ret < 0) {
debug("%s: Failed to reset: %d\n", __func__, ret);
return ret;
}
}
return 0;
}
/*
* Intialise max98095 codec device
*
* @param priv max98095 information
* @return 0 for success or negative error code.
*/
static int max98095_device_init(struct maxim_priv *priv)
{
unsigned char id;
int ret;
/* reset the codec, the DSP core, and disable all interrupts */
ret = max98095_reset(priv);
if (ret != 0) {
debug("Reset\n");
return ret;
}
/* initialize private data */
priv->sysclk = -1U;
priv->rate = -1U;
priv->fmt = -1U;
ret = maxim_i2c_read(priv, M98095_0FF_REV_ID, &id);
if (ret < 0) {
debug("%s: Failure reading hardware revision: %d\n",
__func__, id);
return ret;
}
debug("%s: Hardware revision: %c\n", __func__, (id - 0x40) + 'A');
return 0;
}
static int max98095_setup_interface(struct maxim_priv *priv,
enum en_max_audio_interface aif_id)
{
int error;
error = maxim_i2c_write(priv, M98095_097_PWR_SYS, M98095_PWRSV);
/*
* initialize registers to hardware default configuring audio
* interface2 to DAC
*/
if (aif_id == AIF1)
error |= maxim_i2c_write(priv, M98095_048_MIX_DAC_LR,
M98095_DAI1L_TO_DACL |
M98095_DAI1R_TO_DACR);
else
error |= maxim_i2c_write(priv, M98095_048_MIX_DAC_LR,
M98095_DAI2M_TO_DACL |
M98095_DAI2M_TO_DACR);
error |= maxim_i2c_write(priv, M98095_092_PWR_EN_OUT,
M98095_SPK_SPREADSPECTRUM);
error |= maxim_i2c_write(priv, M98095_04E_CFG_HP, M98095_HPNORMAL);
if (aif_id == AIF1)
error |= maxim_i2c_write(priv, M98095_02C_DAI1_IOCFG,
M98095_S1NORMAL | M98095_SDATA);
else
error |= maxim_i2c_write(priv, M98095_036_DAI2_IOCFG,
M98095_S2NORMAL | M98095_SDATA);
/* take the codec out of the shut down */
error |= maxim_bic_or(priv, M98095_097_PWR_SYS, M98095_SHDNRUN,
M98095_SHDNRUN);
/*
* route DACL and DACR output to HO and Speakers
* Ordering: DACL, DACR, DACL, DACR
*/
error |= maxim_i2c_write(priv, M98095_050_MIX_SPK_LEFT, 0x01);
error |= maxim_i2c_write(priv, M98095_051_MIX_SPK_RIGHT, 0x01);
error |= maxim_i2c_write(priv, M98095_04C_MIX_HP_LEFT, 0x01);
error |= maxim_i2c_write(priv, M98095_04D_MIX_HP_RIGHT, 0x01);
/* power Enable */
error |= maxim_i2c_write(priv, M98095_091_PWR_EN_OUT, 0xF3);
/* set Volume */
error |= maxim_i2c_write(priv, M98095_064_LVL_HP_L, 15);
error |= maxim_i2c_write(priv, M98095_065_LVL_HP_R, 15);
error |= maxim_i2c_write(priv, M98095_067_LVL_SPK_L, 16);
error |= maxim_i2c_write(priv, M98095_068_LVL_SPK_R, 16);
/* Enable DAIs */
error |= maxim_i2c_write(priv, M98095_093_BIAS_CTRL, 0x30);
if (aif_id == AIF1)
error |= maxim_i2c_write(priv, M98095_096_PWR_DAC_CK, 0x01);
else
error |= maxim_i2c_write(priv, M98095_096_PWR_DAC_CK, 0x07);
if (error < 0)
return -EIO;
return 0;
}
static int max98095_do_init(struct maxim_priv *priv,
enum en_max_audio_interface aif_id,
int sampling_rate, int mclk_freq,
int bits_per_sample)
{
int ret = 0;
ret = max98095_setup_interface(priv, aif_id);
if (ret < 0) {
debug("%s: max98095 setup interface failed\n", __func__);
return ret;
}
ret = max98095_set_sysclk(priv, mclk_freq);
if (ret < 0) {
debug("%s: max98095 codec set sys clock failed\n", __func__);
return ret;
}
ret = max98095_hw_params(priv, aif_id, sampling_rate,
bits_per_sample);
if (ret == 0) {
ret = max98095_set_fmt(priv, SND_SOC_DAIFMT_I2S |
SND_SOC_DAIFMT_NB_NF |
SND_SOC_DAIFMT_CBS_CFS,
aif_id);
}
return ret;
}
static int max98095_set_params(struct udevice *dev, int interface, int rate,
int mclk_freq, int bits_per_sample,
uint channels)
{
struct maxim_priv *priv = dev_get_priv(dev);
return max98095_do_init(priv, interface, rate, mclk_freq,
bits_per_sample);
}
static int max98095_probe(struct udevice *dev)
{
struct maxim_priv *priv = dev_get_priv(dev);
int ret;
priv->dev = dev;
ret = max98095_device_init(priv);
if (ret < 0) {
debug("%s: max98095 codec chip init failed\n", __func__);
return ret;
}
return 0;
}
static const struct audio_codec_ops max98095_ops = {
.set_params = max98095_set_params,
};
static const struct udevice_id max98095_ids[] = {
{ .compatible = "maxim,max98095" },
{ }
};
U_BOOT_DRIVER(max98095) = {
.name = "max98095",
.id = UCLASS_AUDIO_CODEC,
.of_match = max98095_ids,
.probe = max98095_probe,
.ops = &max98095_ops,
.priv_auto_alloc_size = sizeof(struct maxim_priv),
};