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u-boot-brain/drivers/sound/max98090.c
Simon Glass 41575d8e4c dm: treewide: Rename auto_alloc_size members to be shorter 
This construct is quite long-winded. In earlier days it made some sense
since auto-allocation was a strange concept. But with driver model now
used pretty universally, we can shorten this to 'auto'. This reduces
verbosity and makes it easier to read.

Coincidentally it also ensures that every declaration is on one line,
thus making dtoc's job easier.

Signed-off-by: Simon Glass <sjg@chromium.org>
2020-12-13 08:00:25 -07:00

373 lines
8.7 KiB
C
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// SPDX-License-Identifier: GPL-2.0+
/*
* max98090.c -- MAX98090 ALSA SoC Audio driver
*
* Copyright 2011 Maxim Integrated Products
*/
#include <common.h>
#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),
};
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