| /* |
| * max98090.c -- MAX98090 ALSA SoC Audio driver |
| * |
| * Copyright 2011 Maxim Integrated Products |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| */ |
| |
| #include <asm/io.h> |
| #include <common.h> |
| #if !defined(CONFIG_TEGRA) |
| #include <asm/arch/clk.h> |
| #include <asm/arch/cpu.h> |
| #include <asm/arch/power.h> |
| #endif |
| #include <asm/gpio.h> |
| #include <div64.h> |
| #include <fdtdec.h> |
| #include <i2c.h> |
| #include <sound.h> |
| #include "i2s.h" |
| #include "maxim_codec.h" |
| #include "max98090.h" |
| |
| /* |
| * Sets hw params for max98090 |
| * |
| * @param max98090 max98090 information pointer |
| * @param rate Sampling rate |
| * @param bits_per_sample Bits per sample |
| * |
| * @return -1 for error and 0 Success. |
| */ |
| int max98090_hw_params(struct maxim_codec_priv *max98090, |
| unsigned int rate, unsigned int bits_per_sample) |
| { |
| int error; |
| unsigned char value; |
| |
| switch (bits_per_sample) { |
| case 16: |
| maxim_codec_i2c_read(M98090_REG_INTERFACE_FORMAT, &value); |
| error = maxim_codec_update_bits(M98090_REG_INTERFACE_FORMAT, |
| M98090_WS_MASK, 0); |
| maxim_codec_i2c_read(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_codec_update_bits(M98090_REG_FILTER_CONFIG, |
| M98090_MODE_MASK, 0); |
| else |
| error |= maxim_codec_update_bits(M98090_REG_FILTER_CONFIG, |
| M98090_MODE_MASK, M98090_MODE_MASK); |
| |
| /* Update sample rate mode */ |
| if (rate < 50000) |
| error |= maxim_codec_update_bits(M98090_REG_FILTER_CONFIG, |
| M98090_DHF_MASK, 0); |
| else |
| error |= maxim_codec_update_bits(M98090_REG_FILTER_CONFIG, |
| M98090_DHF_MASK, M98090_DHF_MASK); |
| |
| if (error < 0) { |
| debug("%s: Error setting hardware params.\n", __func__); |
| return -1; |
| } |
| |
| return 0; |
| } |
| |
| /* |
| * Configures Audio interface system clock for the given frequency |
| * |
| * @param max98090 max98090 information |
| * @param freq Sampling frequency in Hz |
| * |
| * @return -1 for error and 0 success. |
| */ |
| int max98090_set_sysclk(struct maxim_codec_priv *max98090, |
| unsigned int freq) |
| { |
| int error = 0; |
| |
| /* Requested clock frequency is already setup */ |
| if (freq == max98090->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_codec_i2c_write(M98090_REG_SYSTEM_CLOCK, |
| M98090_PSCLK_DIV1); |
| } else if ((freq >= 20000000) && (freq < 40000000)) { |
| error = maxim_codec_i2c_write(M98090_REG_SYSTEM_CLOCK, |
| M98090_PSCLK_DIV2); |
| } else if ((freq >= 40000000) && (freq < 60000000)) { |
| error = maxim_codec_i2c_write(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; |
| |
| max98090->sysclk = freq; |
| |
| return 0; |
| } |
| |
| /* |
| * Sets Max98090 I2S format |
| * |
| * @param max98090 max98090 information |
| * @param fmt i2S format - supports a subset of the options defined |
| * in i2s.h. |
| * |
| * @return -1 for error and 0 Success. |
| */ |
| int max98090_set_fmt(struct maxim_codec_priv *max98090, int fmt) |
| { |
| u8 regval = 0; |
| int error = 0; |
| |
| if (fmt == max98090->fmt) |
| return 0; |
| |
| max98090->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_codec_i2c_write(M98090_REG_CLOCK_RATIO_NI_MSB, |
| 0x00); |
| error |= maxim_codec_i2c_write(M98090_REG_CLOCK_RATIO_NI_LSB, |
| 0x00); |
| error |= maxim_codec_update_bits(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 -1; |
| } |
| |
| error |= maxim_codec_i2c_write(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 -1; |
| } |
| |
| 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 -1; |
| } |
| |
| error |= maxim_codec_i2c_write(M98090_REG_INTERFACE_FORMAT, |
| regval); |
| |
| if (error < 0) { |
| debug("%s: Error setting i2s format.\n", __func__); |
| return -1; |
| } |
| |
| return 0; |
| } |
| |
| /* |
| * resets the audio codec |
| * |
| * @return -1 for error and 0 success. |
| */ |
| static int max98090_reset(void) |
| { |
| int ret; |
| |
| /* |
| * Gracefully reset the DSP core and the codec hardware in a proper |
| * sequence. |
| */ |
| ret = maxim_codec_i2c_write(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; |
| } |
| |
| /* |
| * Intialise max98090 codec device |
| * |
| * @param max98090 max98090 information |
| * |
| * @returns -1 for error and 0 Success. |
| */ |
| int max98090_device_init(struct maxim_codec_priv *max98090) |
| { |
| unsigned char id; |
| int error = 0; |
| |
| /* reset the codec, the DSP core, and disable all interrupts */ |
| error = max98090_reset(); |
| if (error != 0) { |
| debug("Reset\n"); |
| return error; |
| } |
| |
| /* initialize private data */ |
| max98090->sysclk = -1U; |
| max98090->rate = -1U; |
| max98090->fmt = -1U; |
| |
| error = maxim_codec_i2c_read(M98090_REG_REVISION_ID, &id); |
| if (error < 0) { |
| debug("%s: Failure reading hardware revision: %d\n", |
| __func__, id); |
| return -1; |
| } |
| /* Reading interrupt status to clear them */ |
| error = maxim_codec_i2c_read(M98090_REG_DEVICE_STATUS, &id); |
| |
| error |= maxim_codec_i2c_write(M98090_REG_DAC_CONTROL, |
| M98090_DACHP_MASK); |
| error |= maxim_codec_i2c_write(M98090_REG_BIAS_CONTROL, |
| M98090_VCM_MODE_MASK); |
| |
| error |= maxim_codec_i2c_write(M98090_REG_LEFT_SPK_MIXER, 0x1); |
| error |= maxim_codec_i2c_write(M98090_REG_RIGHT_SPK_MIXER, 0x2); |
| |
| error |= maxim_codec_i2c_write(M98090_REG_LEFT_SPK_VOLUME, 0x25); |
| error |= maxim_codec_i2c_write(M98090_REG_RIGHT_SPK_VOLUME, 0x25); |
| |
| error |= maxim_codec_i2c_write(M98090_REG_CLOCK_RATIO_NI_MSB, 0x0); |
| error |= maxim_codec_i2c_write(M98090_REG_CLOCK_RATIO_NI_LSB, 0x0); |
| error |= maxim_codec_i2c_write(M98090_REG_MASTER_MODE, 0x0); |
| error |= maxim_codec_i2c_write(M98090_REG_INTERFACE_FORMAT, 0x0); |
| error |= maxim_codec_i2c_write(M98090_REG_IO_CONFIGURATION, |
| M98090_SDIEN_MASK); |
| error |= maxim_codec_i2c_write(M98090_REG_DEVICE_SHUTDOWN, |
| M98090_SHDNN_MASK); |
| error |= maxim_codec_i2c_write(M98090_REG_OUTPUT_ENABLE, |
| M98090_HPREN_MASK | |
| M98090_HPLEN_MASK | |
| M98090_SPREN_MASK | |
| M98090_SPLEN_MASK | |
| M98090_DAREN_MASK | |
| M98090_DALEN_MASK); |
| error |= maxim_codec_i2c_write(M98090_REG_IO_CONFIGURATION, |
| M98090_SDOEN_MASK | M98090_SDIEN_MASK); |
| |
| if (error < 0) |
| return -1; |
| |
| return 0; |
| } |