// SPDX-License-Identifier: GPL-2.0+ /* * max98090.c -- MAX98090 ALSA SoC Audio driver * * Copyright 2011 Maxim Integrated Products */ #include #include #include #include #include #include #include #include #include #include "maxim_codec.h" #include "max98090.h" /* * Sets hw params for max98090 * * @priv: max98090 information pointer * @rate: Sampling rate * @bits_per_sample: Bits per sample * * Return: -EIO for error, 0 for success. */ int max98090_hw_params(struct maxim_priv *priv, unsigned int rate, unsigned int bits_per_sample) { int error; unsigned char value; switch (bits_per_sample) { case 16: maxim_i2c_read(priv, M98090_REG_INTERFACE_FORMAT, &value); error = maxim_bic_or(priv, M98090_REG_INTERFACE_FORMAT, M98090_WS_MASK, 0); maxim_i2c_read(priv, M98090_REG_INTERFACE_FORMAT, &value); break; default: debug("%s: Illegal bits per sample %d.\n", __func__, bits_per_sample); return -1; } /* Update filter mode */ if (rate < 240000) error |= maxim_bic_or(priv, M98090_REG_FILTER_CONFIG, M98090_MODE_MASK, 0); else error |= maxim_bic_or(priv, M98090_REG_FILTER_CONFIG, M98090_MODE_MASK, M98090_MODE_MASK); /* Update sample rate mode */ if (rate < 50000) error |= maxim_bic_or(priv, M98090_REG_FILTER_CONFIG, M98090_DHF_MASK, 0); else error |= maxim_bic_or(priv, M98090_REG_FILTER_CONFIG, M98090_DHF_MASK, M98090_DHF_MASK); if (error < 0) { debug("%s: Error setting hardware params.\n", __func__); return -EIO; } priv->rate = rate; return 0; } /* * Configures Audio interface system clock for the given frequency * * @priv: max98090 information * @freq: Sampling frequency in Hz * * Return: -EIO for error, 0 for success. */ int max98090_set_sysclk(struct maxim_priv *priv, unsigned int freq) { int error = 0; /* Requested clock frequency is already setup */ if (freq == priv->sysclk) return 0; /* Setup clocks for slave mode, and using the PLL * PSCLK = 0x01 (when master clk is 10MHz to 20MHz) * 0x02 (when master clk is 20MHz to 40MHz).. * 0x03 (when master clk is 40MHz to 60MHz).. */ if (freq >= 10000000 && freq < 20000000) { error = maxim_i2c_write(priv, M98090_REG_SYSTEM_CLOCK, M98090_PSCLK_DIV1); } else if (freq >= 20000000 && freq < 40000000) { error = maxim_i2c_write(priv, M98090_REG_SYSTEM_CLOCK, M98090_PSCLK_DIV2); } else if (freq >= 40000000 && freq < 60000000) { error = maxim_i2c_write(priv, M98090_REG_SYSTEM_CLOCK, M98090_PSCLK_DIV4); } else { debug("%s: Invalid master clock frequency\n", __func__); return -1; } debug("%s: Clock at %uHz\n", __func__, freq); if (error < 0) return -1; priv->sysclk = freq; return 0; } /* * Sets Max98090 I2S format * * @priv: max98090 information * @fmt: i2S format - supports a subset of the options defined in i2s.h. * * Return: -EIO for error, 0 for success. */ int max98090_set_fmt(struct maxim_priv *priv, int fmt) { u8 regval = 0; int error = 0; if (fmt == priv->fmt) return 0; priv->fmt = fmt; switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { case SND_SOC_DAIFMT_CBS_CFS: /* Set to slave mode PLL - MAS mode off */ error |= maxim_i2c_write(priv, M98090_REG_CLOCK_RATIO_NI_MSB, 0x00); error |= maxim_i2c_write(priv, M98090_REG_CLOCK_RATIO_NI_LSB, 0x00); error |= maxim_bic_or(priv, M98090_REG_CLOCK_MODE, M98090_USE_M1_MASK, 0); break; case SND_SOC_DAIFMT_CBM_CFM: /* Set to master mode */ debug("Master mode not supported\n"); break; case SND_SOC_DAIFMT_CBS_CFM: case SND_SOC_DAIFMT_CBM_CFS: default: debug("%s: Clock mode unsupported\n", __func__); return -EINVAL; } error |= maxim_i2c_write(priv, M98090_REG_MASTER_MODE, regval); regval = 0; switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { case SND_SOC_DAIFMT_I2S: regval |= M98090_DLY_MASK; break; case SND_SOC_DAIFMT_LEFT_J: break; case SND_SOC_DAIFMT_RIGHT_J: regval |= M98090_RJ_MASK; break; case SND_SOC_DAIFMT_DSP_A: /* Not supported mode */ default: debug("%s: Unrecognized format.\n", __func__); return -EINVAL; } switch (fmt & SND_SOC_DAIFMT_INV_MASK) { case SND_SOC_DAIFMT_NB_NF: break; case SND_SOC_DAIFMT_NB_IF: regval |= M98090_WCI_MASK; break; case SND_SOC_DAIFMT_IB_NF: regval |= M98090_BCI_MASK; break; case SND_SOC_DAIFMT_IB_IF: regval |= M98090_BCI_MASK | M98090_WCI_MASK; break; default: debug("%s: Unrecognized inversion settings.\n", __func__); return -EINVAL; } error |= maxim_i2c_write(priv, M98090_REG_INTERFACE_FORMAT, regval); if (error < 0) { debug("%s: Error setting i2s format.\n", __func__); return -EIO; } return 0; } /* * resets the audio codec * * @priv: max98090 information * Return: -EIO for error, 0 for success. */ static int max98090_reset(struct maxim_priv *priv) { int ret; /* * Gracefully reset the DSP core and the codec hardware in a proper * sequence. */ ret = maxim_i2c_write(priv, M98090_REG_SOFTWARE_RESET, M98090_SWRESET_MASK); if (ret != 0) { debug("%s: Failed to reset DSP: %d\n", __func__, ret); return ret; } mdelay(20); return 0; } /* * Initialise max98090 codec device * * @priv: max98090 information * * Return: -EIO for error, 0 for success. */ int max98090_device_init(struct maxim_priv *priv) { unsigned char id; int error = 0; /* reset the codec, the DSP core, and disable all interrupts */ error = max98090_reset(priv); if (error != 0) { debug("Reset\n"); return error; } /* initialize private data */ priv->sysclk = -1U; priv->rate = -1U; priv->fmt = -1U; error = maxim_i2c_read(priv, M98090_REG_REVISION_ID, &id); if (error < 0) { debug("%s: Failure reading hardware revision: %d\n", __func__, id); return -EIO; } debug("%s: Hardware revision: %d\n", __func__, id); return 0; } static int max98090_setup_interface(struct maxim_priv *priv) { unsigned char id; int error; /* Reading interrupt status to clear them */ error = maxim_i2c_read(priv, M98090_REG_DEVICE_STATUS, &id); error |= maxim_i2c_write(priv, M98090_REG_DAC_CONTROL, M98090_DACHP_MASK); error |= maxim_i2c_write(priv, M98090_REG_BIAS_CONTROL, M98090_VCM_MODE_MASK); error |= maxim_i2c_write(priv, M98090_REG_LEFT_SPK_MIXER, 0x1); error |= maxim_i2c_write(priv, M98090_REG_RIGHT_SPK_MIXER, 0x2); error |= maxim_i2c_write(priv, M98090_REG_LEFT_SPK_VOLUME, 0x25); error |= maxim_i2c_write(priv, M98090_REG_RIGHT_SPK_VOLUME, 0x25); error |= maxim_i2c_write(priv, M98090_REG_CLOCK_RATIO_NI_MSB, 0x0); error |= maxim_i2c_write(priv, M98090_REG_CLOCK_RATIO_NI_LSB, 0x0); error |= maxim_i2c_write(priv, M98090_REG_MASTER_MODE, 0x0); error |= maxim_i2c_write(priv, M98090_REG_INTERFACE_FORMAT, 0x0); error |= maxim_i2c_write(priv, M98090_REG_IO_CONFIGURATION, M98090_SDIEN_MASK); error |= maxim_i2c_write(priv, M98090_REG_DEVICE_SHUTDOWN, M98090_SHDNN_MASK); error |= maxim_i2c_write(priv, M98090_REG_OUTPUT_ENABLE, M98090_HPREN_MASK | M98090_HPLEN_MASK | M98090_SPREN_MASK | M98090_SPLEN_MASK | M98090_DAREN_MASK | M98090_DALEN_MASK); error |= maxim_i2c_write(priv, M98090_REG_IO_CONFIGURATION, M98090_SDOEN_MASK | M98090_SDIEN_MASK); if (error < 0) return -EIO; return 0; } static int max98090_do_init(struct maxim_priv *priv, int sampling_rate, int mclk_freq, int bits_per_sample) { int ret = 0; ret = max98090_setup_interface(priv); if (ret < 0) { debug("%s: max98090 setup interface failed\n", __func__); return ret; } ret = max98090_set_sysclk(priv, mclk_freq); if (ret < 0) { debug("%s: max98090 codec set sys clock failed\n", __func__); return ret; } ret = max98090_hw_params(priv, sampling_rate, bits_per_sample); if (ret == 0) { ret = max98090_set_fmt(priv, SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS); } return ret; } static int max98090_set_params(struct udevice *dev, int interface, int rate, int mclk_freq, int bits_per_sample, uint channels) { struct maxim_priv *priv = dev_get_priv(dev); return max98090_do_init(priv, rate, mclk_freq, bits_per_sample); } static int max98090_probe(struct udevice *dev) { struct maxim_priv *priv = dev_get_priv(dev); int ret; priv->dev = dev; ret = max98090_device_init(priv); if (ret < 0) { debug("%s: max98090 codec chip init failed\n", __func__); return ret; } return 0; } static const struct audio_codec_ops max98090_ops = { .set_params = max98090_set_params, }; static const struct udevice_id max98090_ids[] = { { .compatible = "maxim,max98090" }, { } }; U_BOOT_DRIVER(max98090) = { .name = "max98090", .id = UCLASS_AUDIO_CODEC, .of_match = max98090_ids, .probe = max98090_probe, .ops = &max98090_ops, .priv_auto = sizeof(struct maxim_priv), };