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https://github.com/AsahiLinux/u-boot
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425 lines
9.8 KiB
C
425 lines
9.8 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* max98088.c -- MAX98088 ALSA SoC Audio driver
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*
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* Copyright 2010 Maxim Integrated Products
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*
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* Modified for U-Boot by Chih-Chung Chang (chihchung@chromium.org),
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* following the changes made in max98095.c
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*/
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#include <common.h>
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#include <audio_codec.h>
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#include <div64.h>
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#include <dm.h>
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#include <i2c.h>
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#include <i2s.h>
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#include <log.h>
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#include <sound.h>
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#include <asm/gpio.h>
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#include "maxim_codec.h"
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#include "max98088.h"
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/* codec mclk clock divider coefficients. Index 0 is reserved. */
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static const int rate_table[] = {0, 8000, 11025, 16000, 22050, 24000, 32000,
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44100, 48000, 88200, 96000};
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/*
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* codec mclk clock divider coefficients based on sampling rate
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*
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* @param rate sampling rate
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* @param value address of indexvalue to be stored
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*
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* @return 0 for success or negative error code.
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*/
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static int rate_value(int rate, u8 *value)
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{
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int i;
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for (i = 1; i < ARRAY_SIZE(rate_table); i++) {
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if (rate_table[i] >= rate) {
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*value = i;
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return 0;
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}
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}
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*value = 1;
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return -EINVAL;
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}
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/*
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* Sets hw params for max98088
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*
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* @priv: max98088 information pointer
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* @rate: Sampling rate
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* @bits_per_sample: Bits per sample
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*
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* @return -EIO for error, 0 for success.
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*/
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int max98088_hw_params(struct maxim_priv *priv, unsigned int rate,
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unsigned int bits_per_sample)
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{
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int error;
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u8 regval;
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switch (bits_per_sample) {
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case 16:
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error = maxim_bic_or(priv, M98088_REG_DAI1_FORMAT,
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M98088_DAI_WS, 0);
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break;
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case 24:
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error = maxim_bic_or(priv, M98088_REG_DAI1_FORMAT,
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M98088_DAI_WS, M98088_DAI_WS);
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break;
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default:
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debug("%s: Illegal bits per sample %d.\n",
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__func__, bits_per_sample);
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return -EINVAL;
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}
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error |= maxim_bic_or(priv, M98088_REG_PWR_SYS, M98088_SHDNRUN, 0);
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if (rate_value(rate, ®val)) {
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debug("%s: Failed to set sample rate to %d.\n",
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__func__, rate);
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return -EIO;
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}
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error |= maxim_bic_or(priv, M98088_REG_DAI1_CLKMODE,
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M98088_CLKMODE_MASK, regval << 4);
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priv->rate = rate;
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/* Update sample rate mode */
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if (rate < 50000)
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error |= maxim_bic_or(priv, M98088_REG_DAI1_FILTERS,
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M98088_DAI_DHF, 0);
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else
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error |= maxim_bic_or(priv, M98088_REG_DAI1_FILTERS,
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M98088_DAI_DHF, M98088_DAI_DHF);
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error |= maxim_bic_or(priv, M98088_REG_PWR_SYS, M98088_SHDNRUN,
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M98088_SHDNRUN);
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if (error < 0) {
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debug("%s: Error setting hardware params.\n", __func__);
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return -EIO;
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}
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priv->rate = rate;
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return 0;
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}
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/*
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* Configures Audio interface system clock for the given frequency
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*
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* @priv: max98088 information
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* @freq: Sampling frequency in Hz
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*
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* @return -EIO for error, 0 for success.
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*/
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int max98088_set_sysclk(struct maxim_priv *priv, unsigned int freq)
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{
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int error = 0;
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u8 pwr;
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/* Requested clock frequency is already setup */
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if (freq == priv->sysclk)
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return 0;
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/*
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* Setup clocks for slave mode, and using the PLL
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* PSCLK = 0x01 (when master clk is 10MHz to 20MHz)
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* 0x02 (when master clk is 20MHz to 30MHz)..
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*/
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if (freq >= 10000000 && freq < 20000000) {
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error = maxim_i2c_write(priv, M98088_REG_SYS_CLK, 0x10);
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} else if ((freq >= 20000000) && (freq < 30000000)) {
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error = maxim_i2c_write(priv, M98088_REG_SYS_CLK, 0x20);
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} else {
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debug("%s: Invalid master clock frequency\n", __func__);
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return -EIO;
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}
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error |= maxim_i2c_read(priv, M98088_REG_PWR_SYS, &pwr);
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if (pwr & M98088_SHDNRUN) {
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error |= maxim_bic_or(priv, M98088_REG_PWR_SYS,
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M98088_SHDNRUN, 0);
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error |= maxim_bic_or(priv, M98088_REG_PWR_SYS,
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M98088_SHDNRUN, M98088_SHDNRUN);
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}
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debug("%s: Clock at %uHz\n", __func__, freq);
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if (error < 0)
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return -EIO;
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priv->sysclk = freq;
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return 0;
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}
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/*
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* Sets Max98090 I2S format
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*
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* @priv: max98088 information
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* @fmt: i2S format - supports a subset of the options defined in i2s.h.
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*
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* @return -EIO for error, 0 for success.
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*/
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int max98088_set_fmt(struct maxim_priv *priv, int fmt)
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{
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u8 reg15val;
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u8 reg14val = 0;
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int error = 0;
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if (fmt == priv->fmt)
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return 0;
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priv->fmt = fmt;
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switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
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case SND_SOC_DAIFMT_CBS_CFS:
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/* Slave mode PLL */
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error |= maxim_i2c_write(priv, M98088_REG_DAI1_CLKCFG_HI,
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0x80);
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error |= maxim_i2c_write(priv, M98088_REG_DAI1_CLKCFG_LO,
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0x00);
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break;
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case SND_SOC_DAIFMT_CBM_CFM:
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/* Set to master mode */
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reg14val |= M98088_DAI_MAS;
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break;
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case SND_SOC_DAIFMT_CBS_CFM:
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case SND_SOC_DAIFMT_CBM_CFS:
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default:
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debug("%s: Clock mode unsupported\n", __func__);
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return -EINVAL;
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}
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switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
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case SND_SOC_DAIFMT_I2S:
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reg14val |= M98088_DAI_DLY;
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break;
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case SND_SOC_DAIFMT_LEFT_J:
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break;
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default:
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debug("%s: Unrecognized format.\n", __func__);
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return -EINVAL;
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}
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switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
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case SND_SOC_DAIFMT_NB_NF:
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break;
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case SND_SOC_DAIFMT_NB_IF:
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reg14val |= M98088_DAI_WCI;
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break;
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case SND_SOC_DAIFMT_IB_NF:
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reg14val |= M98088_DAI_BCI;
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break;
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case SND_SOC_DAIFMT_IB_IF:
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reg14val |= M98088_DAI_BCI | M98088_DAI_WCI;
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break;
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default:
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debug("%s: Unrecognized inversion settings.\n", __func__);
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return -EINVAL;
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}
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error |= maxim_bic_or(priv, M98088_REG_DAI1_FORMAT,
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M98088_DAI_MAS | M98088_DAI_DLY | M98088_DAI_BCI |
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M98088_DAI_WCI, reg14val);
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reg15val = M98088_DAI_BSEL64;
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error |= maxim_i2c_write(priv, M98088_REG_DAI1_CLOCK, reg15val);
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if (error < 0) {
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debug("%s: Error setting i2s format.\n", __func__);
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return -EIO;
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}
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return 0;
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}
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/*
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* max98088_reset() - reset the audio codec
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*
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* @priv: max98088 information
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* @return -EIO for error, 0 for success.
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*/
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static int max98088_reset(struct maxim_priv *priv)
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{
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int ret, i;
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u8 val;
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/*
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* Reset to hardware default for registers, as there is not a soft
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* reset hardware control register.
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*/
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for (i = M98088_REG_IRQ_ENABLE; i <= M98088_REG_PWR_SYS; i++) {
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switch (i) {
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case M98088_REG_BIAS_CNTL:
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val = 0xf0;
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break;
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case M98088_REG_DAC_BIAS2:
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val = 0x0f;
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break;
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default:
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val = 0;
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}
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ret = maxim_i2c_write(priv, i, val);
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if (ret < 0) {
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debug("%s: Failed to reset: %d\n", __func__, ret);
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return ret;
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}
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}
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return 0;
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}
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/**
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* max98088_device_init() - Initialise max98088 codec device
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*
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* @priv: max98088 information
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*
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* @return -EIO for error, 0 for success.
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*/
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static int max98088_device_init(struct maxim_priv *priv)
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{
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unsigned char id;
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int error = 0;
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/* reset the codec, the DSP core, and disable all interrupts */
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error = max98088_reset(priv);
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if (error != 0) {
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debug("Reset\n");
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return error;
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}
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/* initialize private data */
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priv->sysclk = -1U;
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priv->rate = -1U;
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priv->fmt = -1U;
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error = maxim_i2c_read(priv, M98088_REG_REV_ID, &id);
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if (error < 0) {
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debug("%s: Failure reading hardware revision: %d\n",
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__func__, id);
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return -EIO;
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}
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debug("%s: Hardware revision: %d\n", __func__, id);
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return 0;
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}
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static int max98088_setup_interface(struct maxim_priv *priv)
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{
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int error;
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/* Reading interrupt status to clear them */
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error = maxim_i2c_write(priv, M98088_REG_PWR_SYS, M98088_PWRSV);
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error |= maxim_i2c_write(priv, M98088_REG_IRQ_ENABLE, 0x00);
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/*
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* initialize registers to hardware default configuring audio
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* interface2 to DAI1
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*/
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error |= maxim_i2c_write(priv, M98088_REG_MIX_DAC,
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M98088_DAI1L_TO_DACL | M98088_DAI1R_TO_DACR);
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error |= maxim_i2c_write(priv, M98088_REG_BIAS_CNTL, 0xF0);
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error |= maxim_i2c_write(priv, M98088_REG_DAC_BIAS2, 0x0F);
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error |= maxim_i2c_write(priv, M98088_REG_DAI1_IOCFG,
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M98088_S2NORMAL | M98088_SDATA);
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/*
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* route DACL and DACR output to headphone and speakers
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* Ordering: DACL, DACR, DACL, DACR
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*/
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error |= maxim_i2c_write(priv, M98088_REG_MIX_SPK_LEFT, 1);
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error |= maxim_i2c_write(priv, M98088_REG_MIX_SPK_RIGHT, 1);
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error |= maxim_i2c_write(priv, M98088_REG_MIX_HP_LEFT, 1);
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error |= maxim_i2c_write(priv, M98088_REG_MIX_HP_RIGHT, 1);
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/* set volume: -12db */
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error |= maxim_i2c_write(priv, M98088_REG_LVL_SPK_L, 0x0f);
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error |= maxim_i2c_write(priv, M98088_REG_LVL_SPK_R, 0x0f);
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/* set volume: -22db */
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error |= maxim_i2c_write(priv, M98088_REG_LVL_HP_L, 0x0d);
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error |= maxim_i2c_write(priv, M98088_REG_LVL_HP_R, 0x0d);
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/* power enable */
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error |= maxim_i2c_write(priv, M98088_REG_PWR_EN_OUT,
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M98088_HPLEN | M98088_HPREN | M98088_SPLEN |
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M98088_SPREN | M98088_DALEN | M98088_DAREN);
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if (error < 0)
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return -EIO;
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return 0;
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}
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static int max98088_do_init(struct maxim_priv *priv, int sampling_rate,
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int mclk_freq, int bits_per_sample)
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{
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int ret = 0;
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ret = max98088_setup_interface(priv);
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if (ret < 0) {
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debug("%s: max98088 setup interface failed\n", __func__);
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return ret;
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}
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ret = max98088_set_sysclk(priv, mclk_freq);
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if (ret < 0) {
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debug("%s: max98088 codec set sys clock failed\n", __func__);
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return ret;
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}
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ret = max98088_hw_params(priv, sampling_rate, bits_per_sample);
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if (ret == 0) {
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ret = max98088_set_fmt(priv, SND_SOC_DAIFMT_I2S |
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SND_SOC_DAIFMT_NB_NF |
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SND_SOC_DAIFMT_CBS_CFS);
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}
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return ret;
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}
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static int max98088_set_params(struct udevice *dev, int interface, int rate,
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int mclk_freq, int bits_per_sample,
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uint channels)
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{
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struct maxim_priv *priv = dev_get_priv(dev);
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return max98088_do_init(priv, rate, mclk_freq, bits_per_sample);
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}
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static int max98088_probe(struct udevice *dev)
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{
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struct maxim_priv *priv = dev_get_priv(dev);
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int ret;
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priv->dev = dev;
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ret = max98088_device_init(priv);
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if (ret < 0) {
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debug("%s: max98088 codec chip init failed\n", __func__);
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return ret;
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}
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return 0;
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}
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static const struct audio_codec_ops max98088_ops = {
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.set_params = max98088_set_params,
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};
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static const struct udevice_id max98088_ids[] = {
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{ .compatible = "maxim,max98088" },
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{ }
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};
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U_BOOT_DRIVER(max98088) = {
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.name = "max98088",
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.id = UCLASS_AUDIO_CODEC,
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.of_match = max98088_ids,
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.probe = max98088_probe,
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.ops = &max98088_ops,
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.priv_auto_alloc_size = sizeof(struct maxim_priv),
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};
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