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- // SPDX-License-Identifier: GPL-2.0+
- /*
- * max98095.c -- MAX98095 ALSA SoC Audio driver
- *
- * Copyright 2011 Maxim Integrated Products
- *
- * Modified for U-Boot by R. Chandrasekar (rcsekar@samsung.com)
- */
- #include <common.h>
- #include <audio_codec.h>
- #include <dm.h>
- #include <div64.h>
- #include <fdtdec.h>
- #include <i2c.h>
- #include <log.h>
- #include <sound.h>
- #include <asm/gpio.h>
- #include "i2s.h"
- #include "max98095.h"
- /* Index 0 is reserved. */
- int rate_table[] = {0, 8000, 11025, 16000, 22050, 24000, 32000, 44100, 48000,
- 88200, 96000};
- /*
- * codec mclk clock divider coefficients based on sampling rate
- *
- * @param rate sampling rate
- * @param value address of indexvalue to be stored
- *
- * @return 0 for success or negative error code.
- */
- static int rate_value(int rate, u8 *value)
- {
- int i;
- for (i = 1; i < ARRAY_SIZE(rate_table); i++) {
- if (rate_table[i] >= rate) {
- *value = i;
- return 0;
- }
- }
- *value = 1;
- return -EINVAL;
- }
- /*
- * Sets hw params for max98095
- *
- * @param priv max98095 information pointer
- * @param rate Sampling rate
- * @param bits_per_sample Bits per sample
- *
- * @return 0 for success or negative error code.
- */
- static int max98095_hw_params(struct maxim_priv *priv,
- enum en_max_audio_interface aif_id,
- unsigned int rate, unsigned int bits_per_sample)
- {
- u8 regval;
- int error;
- unsigned short M98095_DAI_CLKMODE;
- unsigned short M98095_DAI_FORMAT;
- unsigned short M98095_DAI_FILTERS;
- if (aif_id == AIF1) {
- M98095_DAI_CLKMODE = M98095_027_DAI1_CLKMODE;
- M98095_DAI_FORMAT = M98095_02A_DAI1_FORMAT;
- M98095_DAI_FILTERS = M98095_02E_DAI1_FILTERS;
- } else {
- M98095_DAI_CLKMODE = M98095_031_DAI2_CLKMODE;
- M98095_DAI_FORMAT = M98095_034_DAI2_FORMAT;
- M98095_DAI_FILTERS = M98095_038_DAI2_FILTERS;
- }
- switch (bits_per_sample) {
- case 16:
- error = maxim_bic_or(priv, M98095_DAI_FORMAT, M98095_DAI_WS, 0);
- break;
- case 24:
- error = maxim_bic_or(priv, M98095_DAI_FORMAT, M98095_DAI_WS,
- M98095_DAI_WS);
- break;
- default:
- debug("%s: Illegal bits per sample %d.\n",
- __func__, bits_per_sample);
- return -EINVAL;
- }
- if (rate_value(rate, ®val)) {
- debug("%s: Failed to set sample rate to %d.\n",
- __func__, rate);
- return -EINVAL;
- }
- priv->rate = rate;
- error |= maxim_bic_or(priv, M98095_DAI_CLKMODE, M98095_CLKMODE_MASK,
- regval);
- /* Update sample rate mode */
- if (rate < 50000)
- error |= maxim_bic_or(priv, M98095_DAI_FILTERS,
- M98095_DAI_DHF, 0);
- else
- error |= maxim_bic_or(priv, M98095_DAI_FILTERS,
- M98095_DAI_DHF, M98095_DAI_DHF);
- if (error < 0) {
- debug("%s: Error setting hardware params.\n", __func__);
- return -EIO;
- }
- return 0;
- }
- /*
- * Configures Audio interface system clock for the given frequency
- *
- * @param priv max98095 information
- * @param freq Sampling frequency in Hz
- *
- * @return 0 for success or negative error code.
- */
- static int max98095_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, M98095_026_SYS_CLK, 0x10);
- } else if ((freq >= 20000000) && (freq < 40000000)) {
- error = maxim_i2c_write(priv, M98095_026_SYS_CLK, 0x20);
- } else if ((freq >= 40000000) && (freq < 60000000)) {
- error = maxim_i2c_write(priv, M98095_026_SYS_CLK, 0x30);
- } else {
- debug("%s: Invalid master clock frequency\n", __func__);
- return -EINVAL;
- }
- debug("%s: Clock at %uHz\n", __func__, freq);
- if (error < 0)
- return -EIO;
- priv->sysclk = freq;
- return 0;
- }
- /*
- * Sets Max98095 I2S format
- *
- * @param priv max98095 information
- * @param fmt i2S format - supports a subset of the options defined
- * in i2s.h.
- *
- * @return 0 for success or negative error code.
- */
- static int max98095_set_fmt(struct maxim_priv *priv, int fmt,
- enum en_max_audio_interface aif_id)
- {
- u8 regval = 0;
- int error = 0;
- unsigned short M98095_DAI_CLKCFG_HI;
- unsigned short M98095_DAI_CLKCFG_LO;
- unsigned short M98095_DAI_FORMAT;
- unsigned short M98095_DAI_CLOCK;
- if (fmt == priv->fmt)
- return 0;
- priv->fmt = fmt;
- if (aif_id == AIF1) {
- M98095_DAI_CLKCFG_HI = M98095_028_DAI1_CLKCFG_HI;
- M98095_DAI_CLKCFG_LO = M98095_029_DAI1_CLKCFG_LO;
- M98095_DAI_FORMAT = M98095_02A_DAI1_FORMAT;
- M98095_DAI_CLOCK = M98095_02B_DAI1_CLOCK;
- } else {
- M98095_DAI_CLKCFG_HI = M98095_032_DAI2_CLKCFG_HI;
- M98095_DAI_CLKCFG_LO = M98095_033_DAI2_CLKCFG_LO;
- M98095_DAI_FORMAT = M98095_034_DAI2_FORMAT;
- M98095_DAI_CLOCK = M98095_035_DAI2_CLOCK;
- }
- switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
- case SND_SOC_DAIFMT_CBS_CFS:
- /* Slave mode PLL */
- error |= maxim_i2c_write(priv, M98095_DAI_CLKCFG_HI, 0x80);
- error |= maxim_i2c_write(priv, M98095_DAI_CLKCFG_LO, 0x00);
- break;
- case SND_SOC_DAIFMT_CBM_CFM:
- /* Set to master mode */
- regval |= M98095_DAI_MAS;
- break;
- case SND_SOC_DAIFMT_CBS_CFM:
- case SND_SOC_DAIFMT_CBM_CFS:
- default:
- debug("%s: Clock mode unsupported\n", __func__);
- return -EINVAL;
- }
- switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
- case SND_SOC_DAIFMT_I2S:
- regval |= M98095_DAI_DLY;
- break;
- case SND_SOC_DAIFMT_LEFT_J:
- break;
- 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 |= M98095_DAI_WCI;
- break;
- case SND_SOC_DAIFMT_IB_NF:
- regval |= M98095_DAI_BCI;
- break;
- case SND_SOC_DAIFMT_IB_IF:
- regval |= M98095_DAI_BCI | M98095_DAI_WCI;
- break;
- default:
- debug("%s: Unrecognized inversion settings.\n", __func__);
- return -EINVAL;
- }
- error |= maxim_bic_or(priv, M98095_DAI_FORMAT,
- M98095_DAI_MAS | M98095_DAI_DLY |
- M98095_DAI_BCI | M98095_DAI_WCI, regval);
- error |= maxim_i2c_write(priv, M98095_DAI_CLOCK, M98095_DAI_BSEL64);
- if (error < 0) {
- debug("%s: Error setting i2s format.\n", __func__);
- return -EIO;
- }
- return 0;
- }
- /*
- * resets the audio codec
- *
- * @param priv Private data for driver
- * @return 0 for success or negative error code.
- */
- static int max98095_reset(struct maxim_priv *priv)
- {
- int i, ret;
- /*
- * Gracefully reset the DSP core and the codec hardware in a proper
- * sequence.
- */
- ret = maxim_i2c_write(priv, M98095_00F_HOST_CFG, 0);
- if (ret != 0) {
- debug("%s: Failed to reset DSP: %d\n", __func__, ret);
- return ret;
- }
- ret = maxim_i2c_write(priv, M98095_097_PWR_SYS, 0);
- if (ret != 0) {
- debug("%s: Failed to reset codec: %d\n", __func__, ret);
- return ret;
- }
- /*
- * Reset to hardware default for registers, as there is not a soft
- * reset hardware control register.
- */
- for (i = M98095_010_HOST_INT_CFG; i < M98095_REG_MAX_CACHED; i++) {
- ret = maxim_i2c_write(priv, i, 0);
- if (ret < 0) {
- debug("%s: Failed to reset: %d\n", __func__, ret);
- return ret;
- }
- }
- return 0;
- }
- /*
- * Intialise max98095 codec device
- *
- * @param priv max98095 information
- * @return 0 for success or negative error code.
- */
- static int max98095_device_init(struct maxim_priv *priv)
- {
- unsigned char id;
- int ret;
- /* reset the codec, the DSP core, and disable all interrupts */
- ret = max98095_reset(priv);
- if (ret != 0) {
- debug("Reset\n");
- return ret;
- }
- /* initialize private data */
- priv->sysclk = -1U;
- priv->rate = -1U;
- priv->fmt = -1U;
- ret = maxim_i2c_read(priv, M98095_0FF_REV_ID, &id);
- if (ret < 0) {
- debug("%s: Failure reading hardware revision: %d\n",
- __func__, id);
- return ret;
- }
- debug("%s: Hardware revision: %c\n", __func__, (id - 0x40) + 'A');
- return 0;
- }
- static int max98095_setup_interface(struct maxim_priv *priv,
- enum en_max_audio_interface aif_id)
- {
- int error;
- error = maxim_i2c_write(priv, M98095_097_PWR_SYS, M98095_PWRSV);
- /*
- * initialize registers to hardware default configuring audio
- * interface2 to DAC
- */
- if (aif_id == AIF1)
- error |= maxim_i2c_write(priv, M98095_048_MIX_DAC_LR,
- M98095_DAI1L_TO_DACL |
- M98095_DAI1R_TO_DACR);
- else
- error |= maxim_i2c_write(priv, M98095_048_MIX_DAC_LR,
- M98095_DAI2M_TO_DACL |
- M98095_DAI2M_TO_DACR);
- error |= maxim_i2c_write(priv, M98095_092_PWR_EN_OUT,
- M98095_SPK_SPREADSPECTRUM);
- error |= maxim_i2c_write(priv, M98095_04E_CFG_HP, M98095_HPNORMAL);
- if (aif_id == AIF1)
- error |= maxim_i2c_write(priv, M98095_02C_DAI1_IOCFG,
- M98095_S1NORMAL | M98095_SDATA);
- else
- error |= maxim_i2c_write(priv, M98095_036_DAI2_IOCFG,
- M98095_S2NORMAL | M98095_SDATA);
- /* take the codec out of the shut down */
- error |= maxim_bic_or(priv, M98095_097_PWR_SYS, M98095_SHDNRUN,
- M98095_SHDNRUN);
- /*
- * route DACL and DACR output to HO and Speakers
- * Ordering: DACL, DACR, DACL, DACR
- */
- error |= maxim_i2c_write(priv, M98095_050_MIX_SPK_LEFT, 0x01);
- error |= maxim_i2c_write(priv, M98095_051_MIX_SPK_RIGHT, 0x01);
- error |= maxim_i2c_write(priv, M98095_04C_MIX_HP_LEFT, 0x01);
- error |= maxim_i2c_write(priv, M98095_04D_MIX_HP_RIGHT, 0x01);
- /* power Enable */
- error |= maxim_i2c_write(priv, M98095_091_PWR_EN_OUT, 0xF3);
- /* set Volume */
- error |= maxim_i2c_write(priv, M98095_064_LVL_HP_L, 15);
- error |= maxim_i2c_write(priv, M98095_065_LVL_HP_R, 15);
- error |= maxim_i2c_write(priv, M98095_067_LVL_SPK_L, 16);
- error |= maxim_i2c_write(priv, M98095_068_LVL_SPK_R, 16);
- /* Enable DAIs */
- error |= maxim_i2c_write(priv, M98095_093_BIAS_CTRL, 0x30);
- if (aif_id == AIF1)
- error |= maxim_i2c_write(priv, M98095_096_PWR_DAC_CK, 0x01);
- else
- error |= maxim_i2c_write(priv, M98095_096_PWR_DAC_CK, 0x07);
- if (error < 0)
- return -EIO;
- return 0;
- }
- static int max98095_do_init(struct maxim_priv *priv,
- enum en_max_audio_interface aif_id,
- int sampling_rate, int mclk_freq,
- int bits_per_sample)
- {
- int ret = 0;
- ret = max98095_setup_interface(priv, aif_id);
- if (ret < 0) {
- debug("%s: max98095 setup interface failed\n", __func__);
- return ret;
- }
- ret = max98095_set_sysclk(priv, mclk_freq);
- if (ret < 0) {
- debug("%s: max98095 codec set sys clock failed\n", __func__);
- return ret;
- }
- ret = max98095_hw_params(priv, aif_id, sampling_rate,
- bits_per_sample);
- if (ret == 0) {
- ret = max98095_set_fmt(priv, SND_SOC_DAIFMT_I2S |
- SND_SOC_DAIFMT_NB_NF |
- SND_SOC_DAIFMT_CBS_CFS,
- aif_id);
- }
- return ret;
- }
- static int max98095_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 max98095_do_init(priv, interface, rate, mclk_freq,
- bits_per_sample);
- }
- static int max98095_probe(struct udevice *dev)
- {
- struct maxim_priv *priv = dev_get_priv(dev);
- int ret;
- priv->dev = dev;
- ret = max98095_device_init(priv);
- if (ret < 0) {
- debug("%s: max98095 codec chip init failed\n", __func__);
- return ret;
- }
- return 0;
- }
- static const struct audio_codec_ops max98095_ops = {
- .set_params = max98095_set_params,
- };
- static const struct udevice_id max98095_ids[] = {
- { .compatible = "maxim,max98095" },
- { }
- };
- U_BOOT_DRIVER(max98095) = {
- .name = "max98095",
- .id = UCLASS_AUDIO_CODEC,
- .of_match = max98095_ids,
- .probe = max98095_probe,
- .ops = &max98095_ops,
- .priv_auto_alloc_size = sizeof(struct maxim_priv),
- };
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