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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_alloc_size = sizeof(struct maxim_priv),
- };
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