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https://github.com/AsahiLinux/u-boot
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335 lines
7 KiB
C
335 lines
7 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright 2019 Google LLC
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*/
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#define LOG_CATEGORY UCLASS_SOUND
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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 <i2c.h>
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#include "rt5677.h"
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#include <log.h>
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struct rt5677_priv {
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struct udevice *dev;
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};
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/* RT5677 has 256 8-bit register addresses, and 16-bit register data */
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struct rt5677_init_reg {
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u8 reg;
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u16 val;
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};
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static struct rt5677_init_reg init_list[] = {
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{RT5677_LOUT1, 0x0800},
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{RT5677_SIDETONE_CTRL, 0x0000},
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{RT5677_STO1_ADC_DIG_VOL, 0x3F3F},
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{RT5677_DAC1_DIG_VOL, 0x9090},
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{RT5677_STO2_ADC_MIXER, 0xA441},
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{RT5677_STO1_ADC_MIXER, 0x5480},
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{RT5677_STO1_DAC_MIXER, 0x8A8A},
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{RT5677_PWR_DIG1, 0x9800}, /* Power up I2S1 */
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{RT5677_PWR_ANLG1, 0xE9D5},
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{RT5677_PWR_ANLG2, 0x2CC0},
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{RT5677_PWR_DSP2, 0x0C00},
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{RT5677_I2S2_SDP, 0x0000},
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{RT5677_CLK_TREE_CTRL1, 0x1111},
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{RT5677_PLL1_CTRL1, 0x0000},
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{RT5677_PLL1_CTRL2, 0x0000},
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{RT5677_DIG_MISC, 0x0029},
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{RT5677_GEN_CTRL1, 0x00FF},
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{RT5677_GPIO_CTRL2, 0x0020},
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{RT5677_PWR_DIG2, 0x9024}, /* Power on ADC Stereo Filters */
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{RT5677_PDM_OUT_CTRL, 0x0088}, /* Unmute PDM, set stereo1 DAC */
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{RT5677_PDM_DATA_CTRL1, 0x0001}, /* Sysclk to PDM filter divider 2 */
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};
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/**
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* rt5677_i2c_read() - Read a 16-bit register
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*
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* @priv: Private driver data
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* @reg: Register number to read
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* @returns data read or -ve on error
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*/
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static int rt5677_i2c_read(struct rt5677_priv *priv, uint reg)
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{
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u8 buf[2];
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int ret;
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ret = dm_i2c_read(priv->dev, reg, buf, sizeof(u16));
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if (ret)
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return ret;
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return buf[0] << 8 | buf[1];
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}
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/**
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* rt5677_i2c_write() - Write a 16-bit register
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*
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* @priv: Private driver data
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* @reg: Register number to read
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* @data: Data to write
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* @returns 0 if OK, -ve on error
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*/
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static int rt5677_i2c_write(struct rt5677_priv *priv, uint reg, uint data)
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{
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u8 buf[2];
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buf[0] = (data >> 8) & 0xff;
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buf[1] = data & 0xff;
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return dm_i2c_write(priv->dev, reg, buf, sizeof(u16));
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}
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/**
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* rt5677_bic_or() - Set and clear bits of a codec register
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*
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* @priv: Private driver data
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* @reg: Register number to update
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* @bic: Mask of bits to clear
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* @set: Mask of bits to set
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* @returns 0 if OK, -ve on error
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*
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*/
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static int rt5677_bic_or(struct rt5677_priv *priv, uint reg, uint bic,
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uint set)
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{
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uint old, new_value;
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int ret;
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old = rt5677_i2c_read(priv, reg);
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if (old < 0)
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return old;
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new_value = (old & ~bic) | (set & bic);
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if (old != new_value) {
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ret = rt5677_i2c_write(priv, reg, new_value);
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if (ret)
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return ret;
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}
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return 0;
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}
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/**
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* rt5677_reg_init() - Initialise codec regs w/static/base values
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*
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* @priv: Private driver data
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* @returns 0 if OK, -ve on error
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*/
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static int rt5677_reg_init(struct rt5677_priv *priv)
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{
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int ret;
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int i;
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for (i = 0; i < ARRAY_SIZE(init_list); i++) {
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ret = rt5677_i2c_write(priv, init_list[i].reg, init_list[i].val);
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if (ret)
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return ret;
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}
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return 0;
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}
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#ifdef DEBUG
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static void debug_dump_5677_regs(struct rt5677_priv *priv, int swap)
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{
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uint i, reg_word;
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/* Show all 16-bit codec regs */
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for (i = 0; i < RT5677_REG_CNT; i++) {
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if (i % 8 == 0)
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log_debug("\nMX%02x: ", i);
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rt5677_i2c_read(priv, (u8)i, ®_word);
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if (swap)
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log_debug("%04x ", swap_bytes16(reg_word));
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else
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log_debug("%04x ", reg_word);
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}
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log_debug("\n");
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/* Show all 16-bit 'private' codec regs */
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for (i = 0; i < RT5677_PR_REG_CNT; i++) {
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if (i % 8 == 0)
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log_debug("\nPR%02x: ", i);
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rt5677_i2c_write(priv, RT5677_PRIV_INDEX, i);
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rt5677_i2c_read(priv, RT5677_PRIV_DATA, ®_word);
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if (swap)
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log_debug("%04x ", swap_bytes16(reg_word));
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else
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log_debug("%04x ", reg_word);
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}
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log_debug("\n");
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}
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#endif /* DEBUG */
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static int rt5677_hw_params(struct rt5677_priv *priv, uint bits_per_sample)
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{
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int ret;
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switch (bits_per_sample) {
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case 16:
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ret = rt5677_bic_or(priv, RT5677_I2S1_SDP, RT5677_I2S_DL_MASK,
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0);
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if (ret) {
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log_debug("Error updating I2S1 Interface Ctrl reg\n");
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return 1;
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}
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break;
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default:
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log_err("Illegal bits per sample %d\n", bits_per_sample);
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return -EINVAL;
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}
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return 0;
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}
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/**
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* rt5677_set_fmt() - set rt5677 I2S format
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*
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* @priv: Private driver data
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* @returns 0 if OK, -ve on error
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*/
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static int rt5677_set_fmt(struct rt5677_priv *priv)
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{
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int ret = 0;
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/*
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* Set format here: Assumes I2S, NB_NF, CBS_CFS
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*
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* CBS_CFS (Codec Bit Slave/Codec Frame Slave)
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*/
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ret = rt5677_bic_or(priv, RT5677_I2S1_SDP, RT5677_I2S_MS_MASK,
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RT5677_I2S_MS_S);
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/* NB_NF (Normal Bit/Normal Frame) */
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ret |= rt5677_bic_or(priv, RT5677_I2S1_SDP, RT5677_I2S_BP_MASK,
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RT5677_I2S_BP_NOR);
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/* I2S mode */
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ret |= rt5677_bic_or(priv, RT5677_I2S1_SDP, RT5677_I2S_DF_MASK,
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RT5677_I2S_DF_I2S);
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/* A44: I2S2 (going to speaker amp) is master */
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ret |= rt5677_bic_or(priv, RT5677_I2S2_SDP, RT5677_I2S_MS_MASK,
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RT5677_I2S_MS_M);
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if (ret) {
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log_err("Error updating I2S1 Interface Ctrl reg\n");
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return ret;
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}
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return 0;
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}
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/**
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* rt5677_reset() - reset the audio codec
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*
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* @priv: Private driver data
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* @returns 0 if OK, -ve on error
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*/
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static int rt5677_reset(struct rt5677_priv *priv)
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{
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int ret;
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/* Reset the codec registers to their defaults */
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ret = rt5677_i2c_write(priv, RT5677_RESET, RT5677_SW_RESET);
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if (ret) {
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log_err("Error resetting codec\n");
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return ret;
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}
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return 0;
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}
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/**
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* Initialise rt5677 codec device
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*
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* @priv: Private driver data
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* @returns 0 if OK, -ve on error
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*/
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int rt5677_device_init(struct rt5677_priv *priv)
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{
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int ret;
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/* Read status reg */
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ret = rt5677_i2c_read(priv, RT5677_RESET);
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if (ret < 0)
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return ret;
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log_debug("reg 00h, Software Reset & Status = 0x%04x\n", ret);
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/* Reset the codec/regs */
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ret = rt5677_reset(priv);
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if (ret)
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return ret;
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ret = rt5677_i2c_read(priv, RT5677_VENDOR_ID1);
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if (ret < 0) {
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log_err("Error reading vendor ID\n");
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return 1;
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}
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log_debug("Hardware ID: %0xX\n", ret);
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ret = rt5677_i2c_read(priv, RT5677_VENDOR_ID2);
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if (ret < 0) {
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log_err("Error reading vendor rev\n");
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return 1;
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}
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log_debug("Hardware revision: %04x\n", ret);
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return 0;
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}
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static int rt5677_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 rt5677_priv *priv = dev_get_priv(dev);
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int ret;
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/* Initialise codec regs w/static/base values, same as Linux driver */
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ret = rt5677_reg_init(priv);
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if (ret)
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return ret;
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ret = rt5677_hw_params(priv, bits_per_sample);
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if (ret)
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return ret;
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ret = rt5677_set_fmt(priv);
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if (ret)
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return ret;
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return 0;
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}
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static int rt5677_probe(struct udevice *dev)
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{
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struct rt5677_priv *priv = dev_get_priv(dev);
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priv->dev = dev;
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return rt5677_device_init(priv);
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}
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static const struct audio_codec_ops rt5677_ops = {
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.set_params = rt5677_set_params,
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};
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static const struct udevice_id rt5677_ids[] = {
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{ .compatible = "realtek,rt5677" },
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{ }
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};
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U_BOOT_DRIVER(rt5677_drv) = {
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.name = "rt5677",
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.id = UCLASS_AUDIO_CODEC,
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.of_match = rt5677_ids,
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.ops = &rt5677_ops,
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.probe = rt5677_probe,
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.priv_auto_alloc_size = sizeof(struct rt5677_priv),
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};
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