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https://github.com/brain-hackers/u-boot-brain
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41575d8e4c
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>
467 lines
11 KiB
C
467 lines
11 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* max98095.c -- MAX98095 ALSA SoC Audio driver
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*
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* Copyright 2011 Maxim Integrated Products
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*
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* Modified for U-Boot by R. Chandrasekar (rcsekar@samsung.com)
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*/
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#include <common.h>
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#include <audio_codec.h>
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#include <dm.h>
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#include <div64.h>
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#include <fdtdec.h>
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#include <i2c.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 "i2s.h"
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#include "max98095.h"
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/* Index 0 is reserved. */
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int rate_table[] = {0, 8000, 11025, 16000, 22050, 24000, 32000, 44100, 48000,
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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 max98095
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*
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* @param priv max98095 information pointer
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* @param rate Sampling rate
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* @param bits_per_sample Bits per sample
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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 max98095_hw_params(struct maxim_priv *priv,
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enum en_max_audio_interface aif_id,
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unsigned int rate, unsigned int bits_per_sample)
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{
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u8 regval;
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int error;
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unsigned short M98095_DAI_CLKMODE;
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unsigned short M98095_DAI_FORMAT;
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unsigned short M98095_DAI_FILTERS;
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if (aif_id == AIF1) {
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M98095_DAI_CLKMODE = M98095_027_DAI1_CLKMODE;
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M98095_DAI_FORMAT = M98095_02A_DAI1_FORMAT;
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M98095_DAI_FILTERS = M98095_02E_DAI1_FILTERS;
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} else {
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M98095_DAI_CLKMODE = M98095_031_DAI2_CLKMODE;
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M98095_DAI_FORMAT = M98095_034_DAI2_FORMAT;
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M98095_DAI_FILTERS = M98095_038_DAI2_FILTERS;
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}
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switch (bits_per_sample) {
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case 16:
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error = maxim_bic_or(priv, M98095_DAI_FORMAT, M98095_DAI_WS, 0);
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break;
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case 24:
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error = maxim_bic_or(priv, M98095_DAI_FORMAT, M98095_DAI_WS,
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M98095_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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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 -EINVAL;
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}
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priv->rate = rate;
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error |= maxim_bic_or(priv, M98095_DAI_CLKMODE, M98095_CLKMODE_MASK,
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regval);
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/* Update sample rate mode */
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if (rate < 50000)
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error |= maxim_bic_or(priv, M98095_DAI_FILTERS,
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M98095_DAI_DHF, 0);
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else
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error |= maxim_bic_or(priv, M98095_DAI_FILTERS,
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M98095_DAI_DHF, M98095_DAI_DHF);
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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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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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* @param priv max98095 information
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* @param freq Sampling frequency in Hz
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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 max98095_set_sysclk(struct maxim_priv *priv, unsigned int freq)
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{
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int error = 0;
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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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/* 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 40MHz)..
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* 0x03 (when master clk is 40MHz to 60MHz)..
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*/
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if ((freq >= 10000000) && (freq < 20000000)) {
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error = maxim_i2c_write(priv, M98095_026_SYS_CLK, 0x10);
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} else if ((freq >= 20000000) && (freq < 40000000)) {
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error = maxim_i2c_write(priv, M98095_026_SYS_CLK, 0x20);
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} else if ((freq >= 40000000) && (freq < 60000000)) {
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error = maxim_i2c_write(priv, M98095_026_SYS_CLK, 0x30);
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} else {
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debug("%s: Invalid master clock frequency\n", __func__);
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return -EINVAL;
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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 Max98095 I2S format
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*
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* @param priv max98095 information
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* @param fmt i2S format - supports a subset of the options defined
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* in i2s.h.
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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 max98095_set_fmt(struct maxim_priv *priv, int fmt,
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enum en_max_audio_interface aif_id)
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{
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u8 regval = 0;
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int error = 0;
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unsigned short M98095_DAI_CLKCFG_HI;
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unsigned short M98095_DAI_CLKCFG_LO;
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unsigned short M98095_DAI_FORMAT;
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unsigned short M98095_DAI_CLOCK;
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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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if (aif_id == AIF1) {
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M98095_DAI_CLKCFG_HI = M98095_028_DAI1_CLKCFG_HI;
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M98095_DAI_CLKCFG_LO = M98095_029_DAI1_CLKCFG_LO;
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M98095_DAI_FORMAT = M98095_02A_DAI1_FORMAT;
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M98095_DAI_CLOCK = M98095_02B_DAI1_CLOCK;
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} else {
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M98095_DAI_CLKCFG_HI = M98095_032_DAI2_CLKCFG_HI;
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M98095_DAI_CLKCFG_LO = M98095_033_DAI2_CLKCFG_LO;
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M98095_DAI_FORMAT = M98095_034_DAI2_FORMAT;
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M98095_DAI_CLOCK = M98095_035_DAI2_CLOCK;
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}
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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, M98095_DAI_CLKCFG_HI, 0x80);
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error |= maxim_i2c_write(priv, M98095_DAI_CLKCFG_LO, 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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regval |= M98095_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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regval |= M98095_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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regval |= M98095_DAI_WCI;
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break;
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case SND_SOC_DAIFMT_IB_NF:
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regval |= M98095_DAI_BCI;
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break;
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case SND_SOC_DAIFMT_IB_IF:
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regval |= M98095_DAI_BCI | M98095_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, M98095_DAI_FORMAT,
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M98095_DAI_MAS | M98095_DAI_DLY |
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M98095_DAI_BCI | M98095_DAI_WCI, regval);
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error |= maxim_i2c_write(priv, M98095_DAI_CLOCK, M98095_DAI_BSEL64);
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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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* resets the audio codec
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*
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* @param priv Private data for driver
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* @return 0 for success or negative error code.
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*/
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static int max98095_reset(struct maxim_priv *priv)
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{
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int i, ret;
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/*
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* Gracefully reset the DSP core and the codec hardware in a proper
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* sequence.
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*/
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ret = maxim_i2c_write(priv, M98095_00F_HOST_CFG, 0);
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if (ret != 0) {
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debug("%s: Failed to reset DSP: %d\n", __func__, ret);
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return ret;
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}
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ret = maxim_i2c_write(priv, M98095_097_PWR_SYS, 0);
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if (ret != 0) {
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debug("%s: Failed to reset codec: %d\n", __func__, ret);
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return ret;
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}
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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 = M98095_010_HOST_INT_CFG; i < M98095_REG_MAX_CACHED; i++) {
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ret = maxim_i2c_write(priv, i, 0);
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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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* Intialise max98095 codec device
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*
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* @param priv max98095 information
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* @return 0 for success or negative error code.
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*/
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static int max98095_device_init(struct maxim_priv *priv)
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{
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unsigned char id;
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int ret;
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/* reset the codec, the DSP core, and disable all interrupts */
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ret = max98095_reset(priv);
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if (ret != 0) {
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debug("Reset\n");
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return ret;
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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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ret = maxim_i2c_read(priv, M98095_0FF_REV_ID, &id);
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if (ret < 0) {
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debug("%s: Failure reading hardware revision: %d\n",
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__func__, id);
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return ret;
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}
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debug("%s: Hardware revision: %c\n", __func__, (id - 0x40) + 'A');
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return 0;
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}
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static int max98095_setup_interface(struct maxim_priv *priv,
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enum en_max_audio_interface aif_id)
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{
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int error;
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error = maxim_i2c_write(priv, M98095_097_PWR_SYS, M98095_PWRSV);
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/*
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* initialize registers to hardware default configuring audio
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* interface2 to DAC
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*/
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if (aif_id == AIF1)
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error |= maxim_i2c_write(priv, M98095_048_MIX_DAC_LR,
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M98095_DAI1L_TO_DACL |
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M98095_DAI1R_TO_DACR);
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else
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error |= maxim_i2c_write(priv, M98095_048_MIX_DAC_LR,
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M98095_DAI2M_TO_DACL |
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M98095_DAI2M_TO_DACR);
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error |= maxim_i2c_write(priv, M98095_092_PWR_EN_OUT,
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M98095_SPK_SPREADSPECTRUM);
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error |= maxim_i2c_write(priv, M98095_04E_CFG_HP, M98095_HPNORMAL);
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if (aif_id == AIF1)
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error |= maxim_i2c_write(priv, M98095_02C_DAI1_IOCFG,
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M98095_S1NORMAL | M98095_SDATA);
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else
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error |= maxim_i2c_write(priv, M98095_036_DAI2_IOCFG,
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M98095_S2NORMAL | M98095_SDATA);
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/* take the codec out of the shut down */
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error |= maxim_bic_or(priv, M98095_097_PWR_SYS, M98095_SHDNRUN,
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M98095_SHDNRUN);
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/*
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* route DACL and DACR output to HO and Speakers
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* Ordering: DACL, DACR, DACL, DACR
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*/
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error |= maxim_i2c_write(priv, M98095_050_MIX_SPK_LEFT, 0x01);
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error |= maxim_i2c_write(priv, M98095_051_MIX_SPK_RIGHT, 0x01);
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error |= maxim_i2c_write(priv, M98095_04C_MIX_HP_LEFT, 0x01);
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error |= maxim_i2c_write(priv, M98095_04D_MIX_HP_RIGHT, 0x01);
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/* power Enable */
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error |= maxim_i2c_write(priv, M98095_091_PWR_EN_OUT, 0xF3);
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/* set Volume */
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error |= maxim_i2c_write(priv, M98095_064_LVL_HP_L, 15);
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error |= maxim_i2c_write(priv, M98095_065_LVL_HP_R, 15);
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error |= maxim_i2c_write(priv, M98095_067_LVL_SPK_L, 16);
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error |= maxim_i2c_write(priv, M98095_068_LVL_SPK_R, 16);
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/* Enable DAIs */
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error |= maxim_i2c_write(priv, M98095_093_BIAS_CTRL, 0x30);
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if (aif_id == AIF1)
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error |= maxim_i2c_write(priv, M98095_096_PWR_DAC_CK, 0x01);
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else
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error |= maxim_i2c_write(priv, M98095_096_PWR_DAC_CK, 0x07);
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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 max98095_do_init(struct maxim_priv *priv,
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enum en_max_audio_interface aif_id,
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int sampling_rate, int mclk_freq,
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int bits_per_sample)
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{
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int ret = 0;
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ret = max98095_setup_interface(priv, aif_id);
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if (ret < 0) {
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debug("%s: max98095 setup interface failed\n", __func__);
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return ret;
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}
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ret = max98095_set_sysclk(priv, mclk_freq);
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if (ret < 0) {
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debug("%s: max98095 codec set sys clock failed\n", __func__);
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return ret;
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}
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ret = max98095_hw_params(priv, aif_id, sampling_rate,
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bits_per_sample);
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if (ret == 0) {
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ret = max98095_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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aif_id);
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}
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return ret;
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}
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static int max98095_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 max98095_do_init(priv, interface, rate, mclk_freq,
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bits_per_sample);
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}
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static int max98095_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 = max98095_device_init(priv);
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if (ret < 0) {
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debug("%s: max98095 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 max98095_ops = {
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.set_params = max98095_set_params,
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};
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static const struct udevice_id max98095_ids[] = {
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{ .compatible = "maxim,max98095" },
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{ }
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};
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U_BOOT_DRIVER(max98095) = {
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.name = "max98095",
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.id = UCLASS_AUDIO_CODEC,
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.of_match = max98095_ids,
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.probe = max98095_probe,
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.ops = &max98095_ops,
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.priv_auto = sizeof(struct maxim_priv),
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};
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