592 lines
16 KiB
C
592 lines
16 KiB
C
/*
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* Driver for the PCM512x CODECs
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*
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* Author: Mark Brown <broonie@linaro.org>
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* Copyright 2014 Linaro Ltd
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*/
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/clk.h>
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#include <linux/pm_runtime.h>
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#include <linux/regmap.h>
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#include <linux/regulator/consumer.h>
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#include <sound/soc.h>
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#include <sound/soc-dapm.h>
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#include <sound/tlv.h>
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#include "pcm512x.h"
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#define PCM512x_NUM_SUPPLIES 3
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static const char * const pcm512x_supply_names[PCM512x_NUM_SUPPLIES] = {
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"AVDD",
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"DVDD",
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"CPVDD",
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};
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struct pcm512x_priv {
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struct regmap *regmap;
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struct clk *sclk;
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struct regulator_bulk_data supplies[PCM512x_NUM_SUPPLIES];
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struct notifier_block supply_nb[PCM512x_NUM_SUPPLIES];
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};
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/*
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* We can't use the same notifier block for more than one supply and
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* there's no way I can see to get from a callback to the caller
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* except container_of().
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*/
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#define PCM512x_REGULATOR_EVENT(n) \
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static int pcm512x_regulator_event_##n(struct notifier_block *nb, \
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unsigned long event, void *data) \
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{ \
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struct pcm512x_priv *pcm512x = container_of(nb, struct pcm512x_priv, \
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supply_nb[n]); \
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if (event & REGULATOR_EVENT_DISABLE) { \
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regcache_mark_dirty(pcm512x->regmap); \
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regcache_cache_only(pcm512x->regmap, true); \
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} \
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return 0; \
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}
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PCM512x_REGULATOR_EVENT(0)
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PCM512x_REGULATOR_EVENT(1)
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PCM512x_REGULATOR_EVENT(2)
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static const struct reg_default pcm512x_reg_defaults[] = {
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{ PCM512x_RESET, 0x00 },
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{ PCM512x_POWER, 0x00 },
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{ PCM512x_MUTE, 0x00 },
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{ PCM512x_DSP, 0x00 },
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{ PCM512x_PLL_REF, 0x00 },
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{ PCM512x_DAC_ROUTING, 0x11 },
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{ PCM512x_DSP_PROGRAM, 0x01 },
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{ PCM512x_CLKDET, 0x00 },
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{ PCM512x_AUTO_MUTE, 0x00 },
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{ PCM512x_ERROR_DETECT, 0x00 },
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{ PCM512x_DIGITAL_VOLUME_1, 0x00 },
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{ PCM512x_DIGITAL_VOLUME_2, 0x30 },
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{ PCM512x_DIGITAL_VOLUME_3, 0x30 },
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{ PCM512x_DIGITAL_MUTE_1, 0x22 },
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{ PCM512x_DIGITAL_MUTE_2, 0x00 },
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{ PCM512x_DIGITAL_MUTE_3, 0x07 },
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{ PCM512x_OUTPUT_AMPLITUDE, 0x00 },
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{ PCM512x_ANALOG_GAIN_CTRL, 0x00 },
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{ PCM512x_UNDERVOLTAGE_PROT, 0x00 },
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{ PCM512x_ANALOG_MUTE_CTRL, 0x00 },
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{ PCM512x_ANALOG_GAIN_BOOST, 0x00 },
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{ PCM512x_VCOM_CTRL_1, 0x00 },
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{ PCM512x_VCOM_CTRL_2, 0x01 },
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};
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static bool pcm512x_readable(struct device *dev, unsigned int reg)
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{
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switch (reg) {
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case PCM512x_RESET:
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case PCM512x_POWER:
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case PCM512x_MUTE:
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case PCM512x_PLL_EN:
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case PCM512x_SPI_MISO_FUNCTION:
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case PCM512x_DSP:
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case PCM512x_GPIO_EN:
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case PCM512x_BCLK_LRCLK_CFG:
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case PCM512x_DSP_GPIO_INPUT:
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case PCM512x_MASTER_MODE:
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case PCM512x_PLL_REF:
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case PCM512x_PLL_COEFF_0:
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case PCM512x_PLL_COEFF_1:
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case PCM512x_PLL_COEFF_2:
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case PCM512x_PLL_COEFF_3:
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case PCM512x_PLL_COEFF_4:
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case PCM512x_DSP_CLKDIV:
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case PCM512x_DAC_CLKDIV:
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case PCM512x_NCP_CLKDIV:
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case PCM512x_OSR_CLKDIV:
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case PCM512x_MASTER_CLKDIV_1:
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case PCM512x_MASTER_CLKDIV_2:
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case PCM512x_FS_SPEED_MODE:
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case PCM512x_IDAC_1:
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case PCM512x_IDAC_2:
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case PCM512x_ERROR_DETECT:
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case PCM512x_I2S_1:
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case PCM512x_I2S_2:
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case PCM512x_DAC_ROUTING:
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case PCM512x_DSP_PROGRAM:
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case PCM512x_CLKDET:
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case PCM512x_AUTO_MUTE:
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case PCM512x_DIGITAL_VOLUME_1:
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case PCM512x_DIGITAL_VOLUME_2:
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case PCM512x_DIGITAL_VOLUME_3:
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case PCM512x_DIGITAL_MUTE_1:
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case PCM512x_DIGITAL_MUTE_2:
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case PCM512x_DIGITAL_MUTE_3:
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case PCM512x_GPIO_OUTPUT_1:
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case PCM512x_GPIO_OUTPUT_2:
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case PCM512x_GPIO_OUTPUT_3:
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case PCM512x_GPIO_OUTPUT_4:
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case PCM512x_GPIO_OUTPUT_5:
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case PCM512x_GPIO_OUTPUT_6:
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case PCM512x_GPIO_CONTROL_1:
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case PCM512x_GPIO_CONTROL_2:
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case PCM512x_OVERFLOW:
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case PCM512x_RATE_DET_1:
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case PCM512x_RATE_DET_2:
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case PCM512x_RATE_DET_3:
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case PCM512x_RATE_DET_4:
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case PCM512x_ANALOG_MUTE_DET:
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case PCM512x_GPIN:
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case PCM512x_DIGITAL_MUTE_DET:
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case PCM512x_OUTPUT_AMPLITUDE:
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case PCM512x_ANALOG_GAIN_CTRL:
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case PCM512x_UNDERVOLTAGE_PROT:
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case PCM512x_ANALOG_MUTE_CTRL:
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case PCM512x_ANALOG_GAIN_BOOST:
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case PCM512x_VCOM_CTRL_1:
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case PCM512x_VCOM_CTRL_2:
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case PCM512x_CRAM_CTRL:
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return true;
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default:
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/* There are 256 raw register addresses */
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return reg < 0xff;
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}
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}
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static bool pcm512x_volatile(struct device *dev, unsigned int reg)
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{
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switch (reg) {
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case PCM512x_PLL_EN:
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case PCM512x_OVERFLOW:
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case PCM512x_RATE_DET_1:
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case PCM512x_RATE_DET_2:
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case PCM512x_RATE_DET_3:
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case PCM512x_RATE_DET_4:
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case PCM512x_ANALOG_MUTE_DET:
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case PCM512x_GPIN:
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case PCM512x_DIGITAL_MUTE_DET:
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case PCM512x_CRAM_CTRL:
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return true;
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default:
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/* There are 256 raw register addresses */
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return reg < 0xff;
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}
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}
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static const DECLARE_TLV_DB_SCALE(digital_tlv, -10350, 50, 1);
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static const DECLARE_TLV_DB_SCALE(analog_tlv, -600, 600, 0);
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static const DECLARE_TLV_DB_SCALE(boost_tlv, 0, 80, 0);
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static const char * const pcm512x_dsp_program_texts[] = {
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"FIR interpolation with de-emphasis",
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"Low latency IIR with de-emphasis",
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"Fixed process flow",
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"High attenuation with de-emphasis",
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"Ringing-less low latency FIR",
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};
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static const unsigned int pcm512x_dsp_program_values[] = {
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1,
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2,
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3,
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5,
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7,
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};
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static SOC_VALUE_ENUM_SINGLE_DECL(pcm512x_dsp_program,
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PCM512x_DSP_PROGRAM, 0, 0x1f,
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pcm512x_dsp_program_texts,
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pcm512x_dsp_program_values);
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static const char * const pcm512x_clk_missing_text[] = {
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"1s", "2s", "3s", "4s", "5s", "6s", "7s", "8s"
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};
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static const struct soc_enum pcm512x_clk_missing =
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SOC_ENUM_SINGLE(PCM512x_CLKDET, 0, 8, pcm512x_clk_missing_text);
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static const char * const pcm512x_autom_text[] = {
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"21ms", "106ms", "213ms", "533ms", "1.07s", "2.13s", "5.33s", "10.66s"
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};
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static const struct soc_enum pcm512x_autom_l =
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SOC_ENUM_SINGLE(PCM512x_AUTO_MUTE, PCM512x_ATML_SHIFT, 8,
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pcm512x_autom_text);
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static const struct soc_enum pcm512x_autom_r =
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SOC_ENUM_SINGLE(PCM512x_AUTO_MUTE, PCM512x_ATMR_SHIFT, 8,
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pcm512x_autom_text);
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static const char * const pcm512x_ramp_rate_text[] = {
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"1 sample/update", "2 samples/update", "4 samples/update",
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"Immediate"
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};
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static const struct soc_enum pcm512x_vndf =
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SOC_ENUM_SINGLE(PCM512x_DIGITAL_MUTE_1, PCM512x_VNDF_SHIFT, 4,
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pcm512x_ramp_rate_text);
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static const struct soc_enum pcm512x_vnuf =
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SOC_ENUM_SINGLE(PCM512x_DIGITAL_MUTE_1, PCM512x_VNUF_SHIFT, 4,
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pcm512x_ramp_rate_text);
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static const struct soc_enum pcm512x_vedf =
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SOC_ENUM_SINGLE(PCM512x_DIGITAL_MUTE_2, PCM512x_VEDF_SHIFT, 4,
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pcm512x_ramp_rate_text);
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static const char * const pcm512x_ramp_step_text[] = {
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"4dB/step", "2dB/step", "1dB/step", "0.5dB/step"
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};
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static const struct soc_enum pcm512x_vnds =
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SOC_ENUM_SINGLE(PCM512x_DIGITAL_MUTE_1, PCM512x_VNDS_SHIFT, 4,
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pcm512x_ramp_step_text);
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static const struct soc_enum pcm512x_vnus =
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SOC_ENUM_SINGLE(PCM512x_DIGITAL_MUTE_1, PCM512x_VNUS_SHIFT, 4,
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pcm512x_ramp_step_text);
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static const struct soc_enum pcm512x_veds =
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SOC_ENUM_SINGLE(PCM512x_DIGITAL_MUTE_2, PCM512x_VEDS_SHIFT, 4,
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pcm512x_ramp_step_text);
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static const struct snd_kcontrol_new pcm512x_controls[] = {
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SOC_DOUBLE_R_TLV("Playback Digital Volume", PCM512x_DIGITAL_VOLUME_2,
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PCM512x_DIGITAL_VOLUME_3, 0, 255, 1, digital_tlv),
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SOC_DOUBLE_TLV("Playback Volume", PCM512x_ANALOG_GAIN_CTRL,
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PCM512x_LAGN_SHIFT, PCM512x_RAGN_SHIFT, 1, 1, analog_tlv),
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SOC_DOUBLE_TLV("Playback Boost Volume", PCM512x_ANALOG_GAIN_BOOST,
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PCM512x_AGBL_SHIFT, PCM512x_AGBR_SHIFT, 1, 0, boost_tlv),
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SOC_DOUBLE("Playback Digital Switch", PCM512x_MUTE, PCM512x_RQML_SHIFT,
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PCM512x_RQMR_SHIFT, 1, 1),
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SOC_SINGLE("Deemphasis Switch", PCM512x_DSP, PCM512x_DEMP_SHIFT, 1, 1),
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SOC_ENUM("DSP Program", pcm512x_dsp_program),
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SOC_ENUM("Clock Missing Period", pcm512x_clk_missing),
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SOC_ENUM("Auto Mute Time Left", pcm512x_autom_l),
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SOC_ENUM("Auto Mute Time Right", pcm512x_autom_r),
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SOC_SINGLE("Auto Mute Mono Switch", PCM512x_DIGITAL_MUTE_3,
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PCM512x_ACTL_SHIFT, 1, 0),
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SOC_DOUBLE("Auto Mute Switch", PCM512x_DIGITAL_MUTE_3, PCM512x_AMLE_SHIFT,
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PCM512x_AMLR_SHIFT, 1, 0),
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SOC_ENUM("Volume Ramp Down Rate", pcm512x_vndf),
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SOC_ENUM("Volume Ramp Down Step", pcm512x_vnds),
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SOC_ENUM("Volume Ramp Up Rate", pcm512x_vnuf),
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SOC_ENUM("Volume Ramp Up Step", pcm512x_vnus),
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SOC_ENUM("Volume Ramp Down Emergency Rate", pcm512x_vedf),
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SOC_ENUM("Volume Ramp Down Emergency Step", pcm512x_veds),
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};
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static const struct snd_soc_dapm_widget pcm512x_dapm_widgets[] = {
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SND_SOC_DAPM_DAC("DACL", NULL, SND_SOC_NOPM, 0, 0),
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SND_SOC_DAPM_DAC("DACR", NULL, SND_SOC_NOPM, 0, 0),
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SND_SOC_DAPM_OUTPUT("OUTL"),
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SND_SOC_DAPM_OUTPUT("OUTR"),
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};
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static const struct snd_soc_dapm_route pcm512x_dapm_routes[] = {
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{ "DACL", NULL, "Playback" },
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{ "DACR", NULL, "Playback" },
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{ "OUTL", NULL, "DACL" },
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{ "OUTR", NULL, "DACR" },
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};
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static int pcm512x_set_bias_level(struct snd_soc_codec *codec,
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enum snd_soc_bias_level level)
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{
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struct pcm512x_priv *pcm512x = dev_get_drvdata(codec->dev);
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int ret;
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switch (level) {
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case SND_SOC_BIAS_ON:
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case SND_SOC_BIAS_PREPARE:
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break;
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case SND_SOC_BIAS_STANDBY:
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ret = regmap_update_bits(pcm512x->regmap, PCM512x_POWER,
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PCM512x_RQST, 0);
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if (ret != 0) {
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dev_err(codec->dev, "Failed to remove standby: %d\n",
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ret);
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return ret;
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}
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break;
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case SND_SOC_BIAS_OFF:
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ret = regmap_update_bits(pcm512x->regmap, PCM512x_POWER,
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PCM512x_RQST, PCM512x_RQST);
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if (ret != 0) {
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dev_err(codec->dev, "Failed to request standby: %d\n",
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ret);
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return ret;
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}
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break;
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}
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codec->dapm.bias_level = level;
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return 0;
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}
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static struct snd_soc_dai_driver pcm512x_dai = {
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.name = "pcm512x-hifi",
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.playback = {
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.stream_name = "Playback",
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.channels_min = 2,
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.channels_max = 2,
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.rates = SNDRV_PCM_RATE_8000_192000,
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.formats = SNDRV_PCM_FMTBIT_S16_LE |
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SNDRV_PCM_FMTBIT_S24_LE |
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SNDRV_PCM_FMTBIT_S32_LE
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},
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};
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static struct snd_soc_codec_driver pcm512x_codec_driver = {
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.set_bias_level = pcm512x_set_bias_level,
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.idle_bias_off = true,
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.controls = pcm512x_controls,
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.num_controls = ARRAY_SIZE(pcm512x_controls),
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.dapm_widgets = pcm512x_dapm_widgets,
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.num_dapm_widgets = ARRAY_SIZE(pcm512x_dapm_widgets),
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.dapm_routes = pcm512x_dapm_routes,
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.num_dapm_routes = ARRAY_SIZE(pcm512x_dapm_routes),
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};
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static const struct regmap_range_cfg pcm512x_range = {
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.name = "Pages", .range_min = PCM512x_VIRT_BASE,
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.range_max = PCM512x_MAX_REGISTER,
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.selector_reg = PCM512x_PAGE,
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.selector_mask = 0xff,
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.window_start = 0, .window_len = 0x100,
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};
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const struct regmap_config pcm512x_regmap = {
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.reg_bits = 8,
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.val_bits = 8,
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.readable_reg = pcm512x_readable,
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.volatile_reg = pcm512x_volatile,
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.ranges = &pcm512x_range,
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.num_ranges = 1,
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.max_register = PCM512x_MAX_REGISTER,
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.reg_defaults = pcm512x_reg_defaults,
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.num_reg_defaults = ARRAY_SIZE(pcm512x_reg_defaults),
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.cache_type = REGCACHE_RBTREE,
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};
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EXPORT_SYMBOL_GPL(pcm512x_regmap);
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int pcm512x_probe(struct device *dev, struct regmap *regmap)
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{
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struct pcm512x_priv *pcm512x;
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int i, ret;
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pcm512x = devm_kzalloc(dev, sizeof(struct pcm512x_priv), GFP_KERNEL);
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if (!pcm512x)
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return -ENOMEM;
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dev_set_drvdata(dev, pcm512x);
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pcm512x->regmap = regmap;
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for (i = 0; i < ARRAY_SIZE(pcm512x->supplies); i++)
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pcm512x->supplies[i].supply = pcm512x_supply_names[i];
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ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(pcm512x->supplies),
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pcm512x->supplies);
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if (ret != 0) {
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dev_err(dev, "Failed to get supplies: %d\n", ret);
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return ret;
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}
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pcm512x->supply_nb[0].notifier_call = pcm512x_regulator_event_0;
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pcm512x->supply_nb[1].notifier_call = pcm512x_regulator_event_1;
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pcm512x->supply_nb[2].notifier_call = pcm512x_regulator_event_2;
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for (i = 0; i < ARRAY_SIZE(pcm512x->supplies); i++) {
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ret = regulator_register_notifier(pcm512x->supplies[i].consumer,
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&pcm512x->supply_nb[i]);
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if (ret != 0) {
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dev_err(dev,
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"Failed to register regulator notifier: %d\n",
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ret);
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}
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}
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ret = regulator_bulk_enable(ARRAY_SIZE(pcm512x->supplies),
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pcm512x->supplies);
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if (ret != 0) {
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dev_err(dev, "Failed to enable supplies: %d\n", ret);
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return ret;
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}
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/* Reset the device, verifying I/O in the process for I2C */
|
|
ret = regmap_write(regmap, PCM512x_RESET,
|
|
PCM512x_RSTM | PCM512x_RSTR);
|
|
if (ret != 0) {
|
|
dev_err(dev, "Failed to reset device: %d\n", ret);
|
|
goto err;
|
|
}
|
|
|
|
ret = regmap_write(regmap, PCM512x_RESET, 0);
|
|
if (ret != 0) {
|
|
dev_err(dev, "Failed to reset device: %d\n", ret);
|
|
goto err;
|
|
}
|
|
|
|
pcm512x->sclk = devm_clk_get(dev, NULL);
|
|
if (IS_ERR(pcm512x->sclk)) {
|
|
if (PTR_ERR(pcm512x->sclk) == -EPROBE_DEFER)
|
|
return -EPROBE_DEFER;
|
|
|
|
dev_info(dev, "No SCLK, using BCLK: %ld\n",
|
|
PTR_ERR(pcm512x->sclk));
|
|
|
|
/* Disable reporting of missing SCLK as an error */
|
|
regmap_update_bits(regmap, PCM512x_ERROR_DETECT,
|
|
PCM512x_IDCH, PCM512x_IDCH);
|
|
|
|
/* Switch PLL input to BCLK */
|
|
regmap_update_bits(regmap, PCM512x_PLL_REF,
|
|
PCM512x_SREF, PCM512x_SREF);
|
|
} else {
|
|
ret = clk_prepare_enable(pcm512x->sclk);
|
|
if (ret != 0) {
|
|
dev_err(dev, "Failed to enable SCLK: %d\n", ret);
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
/* Default to standby mode */
|
|
ret = regmap_update_bits(pcm512x->regmap, PCM512x_POWER,
|
|
PCM512x_RQST, PCM512x_RQST);
|
|
if (ret != 0) {
|
|
dev_err(dev, "Failed to request standby: %d\n",
|
|
ret);
|
|
goto err_clk;
|
|
}
|
|
|
|
pm_runtime_set_active(dev);
|
|
pm_runtime_enable(dev);
|
|
pm_runtime_idle(dev);
|
|
|
|
ret = snd_soc_register_codec(dev, &pcm512x_codec_driver,
|
|
&pcm512x_dai, 1);
|
|
if (ret != 0) {
|
|
dev_err(dev, "Failed to register CODEC: %d\n", ret);
|
|
goto err_pm;
|
|
}
|
|
|
|
return 0;
|
|
|
|
err_pm:
|
|
pm_runtime_disable(dev);
|
|
err_clk:
|
|
if (!IS_ERR(pcm512x->sclk))
|
|
clk_disable_unprepare(pcm512x->sclk);
|
|
err:
|
|
regulator_bulk_disable(ARRAY_SIZE(pcm512x->supplies),
|
|
pcm512x->supplies);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(pcm512x_probe);
|
|
|
|
void pcm512x_remove(struct device *dev)
|
|
{
|
|
struct pcm512x_priv *pcm512x = dev_get_drvdata(dev);
|
|
|
|
snd_soc_unregister_codec(dev);
|
|
pm_runtime_disable(dev);
|
|
if (!IS_ERR(pcm512x->sclk))
|
|
clk_disable_unprepare(pcm512x->sclk);
|
|
regulator_bulk_disable(ARRAY_SIZE(pcm512x->supplies),
|
|
pcm512x->supplies);
|
|
}
|
|
EXPORT_SYMBOL_GPL(pcm512x_remove);
|
|
|
|
#ifdef CONFIG_PM_RUNTIME
|
|
static int pcm512x_suspend(struct device *dev)
|
|
{
|
|
struct pcm512x_priv *pcm512x = dev_get_drvdata(dev);
|
|
int ret;
|
|
|
|
ret = regmap_update_bits(pcm512x->regmap, PCM512x_POWER,
|
|
PCM512x_RQPD, PCM512x_RQPD);
|
|
if (ret != 0) {
|
|
dev_err(dev, "Failed to request power down: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
ret = regulator_bulk_disable(ARRAY_SIZE(pcm512x->supplies),
|
|
pcm512x->supplies);
|
|
if (ret != 0) {
|
|
dev_err(dev, "Failed to disable supplies: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
if (!IS_ERR(pcm512x->sclk))
|
|
clk_disable_unprepare(pcm512x->sclk);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int pcm512x_resume(struct device *dev)
|
|
{
|
|
struct pcm512x_priv *pcm512x = dev_get_drvdata(dev);
|
|
int ret;
|
|
|
|
if (!IS_ERR(pcm512x->sclk)) {
|
|
ret = clk_prepare_enable(pcm512x->sclk);
|
|
if (ret != 0) {
|
|
dev_err(dev, "Failed to enable SCLK: %d\n", ret);
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
ret = regulator_bulk_enable(ARRAY_SIZE(pcm512x->supplies),
|
|
pcm512x->supplies);
|
|
if (ret != 0) {
|
|
dev_err(dev, "Failed to enable supplies: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
regcache_cache_only(pcm512x->regmap, false);
|
|
ret = regcache_sync(pcm512x->regmap);
|
|
if (ret != 0) {
|
|
dev_err(dev, "Failed to sync cache: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
ret = regmap_update_bits(pcm512x->regmap, PCM512x_POWER,
|
|
PCM512x_RQPD, 0);
|
|
if (ret != 0) {
|
|
dev_err(dev, "Failed to remove power down: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
const struct dev_pm_ops pcm512x_pm_ops = {
|
|
SET_RUNTIME_PM_OPS(pcm512x_suspend, pcm512x_resume, NULL)
|
|
};
|
|
EXPORT_SYMBOL_GPL(pcm512x_pm_ops);
|
|
|
|
MODULE_DESCRIPTION("ASoC PCM512x codec driver");
|
|
MODULE_AUTHOR("Mark Brown <broonie@linaro.org>");
|
|
MODULE_LICENSE("GPL v2");
|