blob: 18a3ffa85c8ed9896b8f8e222e01a723216c949f [file] [log] [blame]
// SPDX-License-Identifier: GPL-2.0+
/*
* max98090.c -- MAX98090 ALSA SoC Audio driver
*
* Copyright 2011 Maxim Integrated Products
*/
#include <audio_codec.h>
#include <div64.h>
#include <dm.h>
#include <i2c.h>
#include <i2s.h>
#include <log.h>
#include <sound.h>
#include <asm/gpio.h>
#include <linux/delay.h>
#include "maxim_codec.h"
#include "max98090.h"
/*
* Sets hw params for max98090
*
* @priv: max98090 information pointer
* @rate: Sampling rate
* @bits_per_sample: Bits per sample
*
* Return: -EIO for error, 0 for success.
*/
int max98090_hw_params(struct maxim_priv *priv, unsigned int rate,
unsigned int bits_per_sample)
{
int error;
unsigned char value;
switch (bits_per_sample) {
case 16:
maxim_i2c_read(priv, M98090_REG_INTERFACE_FORMAT, &value);
error = maxim_bic_or(priv, M98090_REG_INTERFACE_FORMAT,
M98090_WS_MASK, 0);
maxim_i2c_read(priv, M98090_REG_INTERFACE_FORMAT, &value);
break;
default:
debug("%s: Illegal bits per sample %d.\n",
__func__, bits_per_sample);
return -1;
}
/* Update filter mode */
if (rate < 240000)
error |= maxim_bic_or(priv, M98090_REG_FILTER_CONFIG,
M98090_MODE_MASK, 0);
else
error |= maxim_bic_or(priv, M98090_REG_FILTER_CONFIG,
M98090_MODE_MASK, M98090_MODE_MASK);
/* Update sample rate mode */
if (rate < 50000)
error |= maxim_bic_or(priv, M98090_REG_FILTER_CONFIG,
M98090_DHF_MASK, 0);
else
error |= maxim_bic_or(priv, M98090_REG_FILTER_CONFIG,
M98090_DHF_MASK, M98090_DHF_MASK);
if (error < 0) {
debug("%s: Error setting hardware params.\n", __func__);
return -EIO;
}
priv->rate = rate;
return 0;
}
/*
* Configures Audio interface system clock for the given frequency
*
* @priv: max98090 information
* @freq: Sampling frequency in Hz
*
* Return: -EIO for error, 0 for success.
*/
int max98090_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, M98090_REG_SYSTEM_CLOCK,
M98090_PSCLK_DIV1);
} else if (freq >= 20000000 && freq < 40000000) {
error = maxim_i2c_write(priv, M98090_REG_SYSTEM_CLOCK,
M98090_PSCLK_DIV2);
} else if (freq >= 40000000 && freq < 60000000) {
error = maxim_i2c_write(priv, M98090_REG_SYSTEM_CLOCK,
M98090_PSCLK_DIV4);
} else {
debug("%s: Invalid master clock frequency\n", __func__);
return -1;
}
debug("%s: Clock at %uHz\n", __func__, freq);
if (error < 0)
return -1;
priv->sysclk = freq;
return 0;
}
/*
* Sets Max98090 I2S format
*
* @priv: max98090 information
* @fmt: i2S format - supports a subset of the options defined in i2s.h.
*
* Return: -EIO for error, 0 for success.
*/
int max98090_set_fmt(struct maxim_priv *priv, int fmt)
{
u8 regval = 0;
int error = 0;
if (fmt == priv->fmt)
return 0;
priv->fmt = fmt;
switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
case SND_SOC_DAIFMT_CBS_CFS:
/* Set to slave mode PLL - MAS mode off */
error |= maxim_i2c_write(priv, M98090_REG_CLOCK_RATIO_NI_MSB,
0x00);
error |= maxim_i2c_write(priv, M98090_REG_CLOCK_RATIO_NI_LSB,
0x00);
error |= maxim_bic_or(priv, M98090_REG_CLOCK_MODE,
M98090_USE_M1_MASK, 0);
break;
case SND_SOC_DAIFMT_CBM_CFM:
/* Set to master mode */
debug("Master mode not supported\n");
break;
case SND_SOC_DAIFMT_CBS_CFM:
case SND_SOC_DAIFMT_CBM_CFS:
default:
debug("%s: Clock mode unsupported\n", __func__);
return -EINVAL;
}
error |= maxim_i2c_write(priv, M98090_REG_MASTER_MODE, regval);
regval = 0;
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_I2S:
regval |= M98090_DLY_MASK;
break;
case SND_SOC_DAIFMT_LEFT_J:
break;
case SND_SOC_DAIFMT_RIGHT_J:
regval |= M98090_RJ_MASK;
break;
case SND_SOC_DAIFMT_DSP_A:
/* Not supported mode */
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 |= M98090_WCI_MASK;
break;
case SND_SOC_DAIFMT_IB_NF:
regval |= M98090_BCI_MASK;
break;
case SND_SOC_DAIFMT_IB_IF:
regval |= M98090_BCI_MASK | M98090_WCI_MASK;
break;
default:
debug("%s: Unrecognized inversion settings.\n", __func__);
return -EINVAL;
}
error |= maxim_i2c_write(priv, M98090_REG_INTERFACE_FORMAT, regval);
if (error < 0) {
debug("%s: Error setting i2s format.\n", __func__);
return -EIO;
}
return 0;
}
/*
* resets the audio codec
*
* @priv: max98090 information
* Return: -EIO for error, 0 for success.
*/
static int max98090_reset(struct maxim_priv *priv)
{
int ret;
/*
* Gracefully reset the DSP core and the codec hardware in a proper
* sequence.
*/
ret = maxim_i2c_write(priv, M98090_REG_SOFTWARE_RESET,
M98090_SWRESET_MASK);
if (ret != 0) {
debug("%s: Failed to reset DSP: %d\n", __func__, ret);
return ret;
}
mdelay(20);
return 0;
}
/*
* Initialise max98090 codec device
*
* @priv: max98090 information
*
* Return: -EIO for error, 0 for success.
*/
int max98090_device_init(struct maxim_priv *priv)
{
unsigned char id;
int error = 0;
/* reset the codec, the DSP core, and disable all interrupts */
error = max98090_reset(priv);
if (error != 0) {
debug("Reset\n");
return error;
}
/* initialize private data */
priv->sysclk = -1U;
priv->rate = -1U;
priv->fmt = -1U;
error = maxim_i2c_read(priv, M98090_REG_REVISION_ID, &id);
if (error < 0) {
debug("%s: Failure reading hardware revision: %d\n",
__func__, id);
return -EIO;
}
debug("%s: Hardware revision: %d\n", __func__, id);
return 0;
}
static int max98090_setup_interface(struct maxim_priv *priv)
{
unsigned char id;
int error;
/* Reading interrupt status to clear them */
error = maxim_i2c_read(priv, M98090_REG_DEVICE_STATUS, &id);
error |= maxim_i2c_write(priv, M98090_REG_DAC_CONTROL,
M98090_DACHP_MASK);
error |= maxim_i2c_write(priv, M98090_REG_BIAS_CONTROL,
M98090_VCM_MODE_MASK);
error |= maxim_i2c_write(priv, M98090_REG_LEFT_SPK_MIXER, 0x1);
error |= maxim_i2c_write(priv, M98090_REG_RIGHT_SPK_MIXER, 0x2);
error |= maxim_i2c_write(priv, M98090_REG_LEFT_SPK_VOLUME, 0x25);
error |= maxim_i2c_write(priv, M98090_REG_RIGHT_SPK_VOLUME, 0x25);
error |= maxim_i2c_write(priv, M98090_REG_CLOCK_RATIO_NI_MSB, 0x0);
error |= maxim_i2c_write(priv, M98090_REG_CLOCK_RATIO_NI_LSB, 0x0);
error |= maxim_i2c_write(priv, M98090_REG_MASTER_MODE, 0x0);
error |= maxim_i2c_write(priv, M98090_REG_INTERFACE_FORMAT, 0x0);
error |= maxim_i2c_write(priv, M98090_REG_IO_CONFIGURATION,
M98090_SDIEN_MASK);
error |= maxim_i2c_write(priv, M98090_REG_DEVICE_SHUTDOWN,
M98090_SHDNN_MASK);
error |= maxim_i2c_write(priv, M98090_REG_OUTPUT_ENABLE,
M98090_HPREN_MASK | M98090_HPLEN_MASK |
M98090_SPREN_MASK | M98090_SPLEN_MASK |
M98090_DAREN_MASK | M98090_DALEN_MASK);
error |= maxim_i2c_write(priv, M98090_REG_IO_CONFIGURATION,
M98090_SDOEN_MASK | M98090_SDIEN_MASK);
if (error < 0)
return -EIO;
return 0;
}
static int max98090_do_init(struct maxim_priv *priv, int sampling_rate,
int mclk_freq, int bits_per_sample)
{
int ret = 0;
ret = max98090_setup_interface(priv);
if (ret < 0) {
debug("%s: max98090 setup interface failed\n", __func__);
return ret;
}
ret = max98090_set_sysclk(priv, mclk_freq);
if (ret < 0) {
debug("%s: max98090 codec set sys clock failed\n", __func__);
return ret;
}
ret = max98090_hw_params(priv, sampling_rate, bits_per_sample);
if (ret == 0) {
ret = max98090_set_fmt(priv, SND_SOC_DAIFMT_I2S |
SND_SOC_DAIFMT_NB_NF |
SND_SOC_DAIFMT_CBS_CFS);
}
return ret;
}
static int max98090_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 max98090_do_init(priv, rate, mclk_freq, bits_per_sample);
}
static int max98090_probe(struct udevice *dev)
{
struct maxim_priv *priv = dev_get_priv(dev);
int ret;
priv->dev = dev;
ret = max98090_device_init(priv);
if (ret < 0) {
debug("%s: max98090 codec chip init failed\n", __func__);
return ret;
}
return 0;
}
static const struct audio_codec_ops max98090_ops = {
.set_params = max98090_set_params,
};
static const struct udevice_id max98090_ids[] = {
{ .compatible = "maxim,max98090" },
{ }
};
U_BOOT_DRIVER(max98090) = {
.name = "max98090",
.id = UCLASS_AUDIO_CODEC,
.of_match = max98090_ids,
.probe = max98090_probe,
.ops = &max98090_ops,
.priv_auto = sizeof(struct maxim_priv),
};