613 lines
14 KiB
C
Executable File
613 lines
14 KiB
C
Executable File
/*
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* wm8776.c -- WM8776 ALSA SoC Audio driver
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*
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* Copyright 2009-12 Wolfson Microelectronics plc
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*
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* Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* TODO: Input ALC/limiter support
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*/
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/init.h>
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#include <linux/delay.h>
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#include <linux/pm.h>
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#include <linux/i2c.h>
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#include <linux/of_device.h>
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#include <linux/regmap.h>
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#include <linux/spi/spi.h>
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#include <linux/slab.h>
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#include <sound/core.h>
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#include <sound/pcm.h>
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#include <sound/pcm_params.h>
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#include <sound/soc.h>
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#include <sound/initval.h>
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#include <sound/tlv.h>
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#include "wm8776.h"
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enum wm8776_chip_type {
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WM8775 = 1,
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WM8776,
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};
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/* codec private data */
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struct wm8776_priv {
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struct regmap *regmap;
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int sysclk[2];
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};
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static const struct reg_default wm8776_reg_defaults[] = {
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{ 0, 0x79 },
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{ 1, 0x79 },
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{ 2, 0x79 },
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{ 3, 0xff },
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{ 4, 0xff },
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{ 5, 0xff },
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{ 6, 0x00 },
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{ 7, 0x90 },
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{ 8, 0x00 },
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{ 9, 0x00 },
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{ 10, 0x22 },
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{ 11, 0x22 },
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{ 12, 0x22 },
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{ 13, 0x08 },
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{ 14, 0xcf },
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{ 15, 0xcf },
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{ 16, 0x7b },
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{ 17, 0x00 },
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{ 18, 0x32 },
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{ 19, 0x00 },
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{ 20, 0xa6 },
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{ 21, 0x01 },
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{ 22, 0x01 },
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};
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static bool wm8776_volatile(struct device *dev, unsigned int reg)
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{
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switch (reg) {
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case WM8776_RESET:
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return true;
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default:
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return false;
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}
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}
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static int wm8776_reset(struct snd_soc_codec *codec)
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{
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return snd_soc_write(codec, WM8776_RESET, 0);
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}
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static const DECLARE_TLV_DB_SCALE(hp_tlv, -12100, 100, 1);
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static const DECLARE_TLV_DB_SCALE(dac_tlv, -12750, 50, 1);
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static const DECLARE_TLV_DB_SCALE(adc_tlv, -10350, 50, 1);
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static const struct snd_kcontrol_new wm8776_snd_controls[] = {
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SOC_DOUBLE_R_TLV("Headphone Playback Volume", WM8776_HPLVOL, WM8776_HPRVOL,
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0, 127, 0, hp_tlv),
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SOC_DOUBLE_R_TLV("Digital Playback Volume", WM8776_DACLVOL, WM8776_DACRVOL,
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0, 255, 0, dac_tlv),
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SOC_SINGLE("Digital Playback ZC Switch", WM8776_DACCTRL1, 0, 1, 0),
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SOC_SINGLE("Deemphasis Switch", WM8776_DACCTRL2, 0, 1, 0),
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SOC_DOUBLE_R_TLV("Capture Volume", WM8776_ADCLVOL, WM8776_ADCRVOL,
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0, 255, 0, adc_tlv),
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SOC_DOUBLE("Capture Switch", WM8776_ADCMUX, 7, 6, 1, 1),
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SOC_DOUBLE_R("Capture ZC Switch", WM8776_ADCLVOL, WM8776_ADCRVOL, 8, 1, 0),
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SOC_SINGLE("Capture HPF Switch", WM8776_ADCIFCTRL, 8, 1, 1),
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};
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static const struct snd_kcontrol_new inmix_controls[] = {
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SOC_DAPM_SINGLE("AIN1 Switch", WM8776_ADCMUX, 0, 1, 0),
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SOC_DAPM_SINGLE("AIN2 Switch", WM8776_ADCMUX, 1, 1, 0),
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SOC_DAPM_SINGLE("AIN3 Switch", WM8776_ADCMUX, 2, 1, 0),
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SOC_DAPM_SINGLE("AIN4 Switch", WM8776_ADCMUX, 3, 1, 0),
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SOC_DAPM_SINGLE("AIN5 Switch", WM8776_ADCMUX, 4, 1, 0),
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};
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static const struct snd_kcontrol_new outmix_controls[] = {
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SOC_DAPM_SINGLE("DAC Switch", WM8776_OUTMUX, 0, 1, 0),
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SOC_DAPM_SINGLE("AUX Switch", WM8776_OUTMUX, 1, 1, 0),
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SOC_DAPM_SINGLE("Bypass Switch", WM8776_OUTMUX, 2, 1, 0),
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};
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static const struct snd_soc_dapm_widget wm8776_dapm_widgets[] = {
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SND_SOC_DAPM_INPUT("AUX"),
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SND_SOC_DAPM_INPUT("AIN1"),
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SND_SOC_DAPM_INPUT("AIN2"),
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SND_SOC_DAPM_INPUT("AIN3"),
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SND_SOC_DAPM_INPUT("AIN4"),
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SND_SOC_DAPM_INPUT("AIN5"),
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SND_SOC_DAPM_MIXER("Input Mixer", WM8776_PWRDOWN, 6, 1,
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inmix_controls, ARRAY_SIZE(inmix_controls)),
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SND_SOC_DAPM_ADC("ADC", "Capture", WM8776_PWRDOWN, 1, 1),
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SND_SOC_DAPM_DAC("DAC", "Playback", WM8776_PWRDOWN, 2, 1),
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SND_SOC_DAPM_MIXER("Output Mixer", SND_SOC_NOPM, 0, 0,
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outmix_controls, ARRAY_SIZE(outmix_controls)),
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SND_SOC_DAPM_PGA("Headphone PGA", WM8776_PWRDOWN, 3, 1, NULL, 0),
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SND_SOC_DAPM_OUTPUT("VOUT"),
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SND_SOC_DAPM_OUTPUT("HPOUTL"),
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SND_SOC_DAPM_OUTPUT("HPOUTR"),
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};
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static const struct snd_soc_dapm_route routes[] = {
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{ "Input Mixer", "AIN1 Switch", "AIN1" },
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{ "Input Mixer", "AIN2 Switch", "AIN2" },
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{ "Input Mixer", "AIN3 Switch", "AIN3" },
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{ "Input Mixer", "AIN4 Switch", "AIN4" },
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{ "Input Mixer", "AIN5 Switch", "AIN5" },
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{ "ADC", NULL, "Input Mixer" },
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{ "Output Mixer", "DAC Switch", "DAC" },
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{ "Output Mixer", "AUX Switch", "AUX" },
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{ "Output Mixer", "Bypass Switch", "Input Mixer" },
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{ "VOUT", NULL, "Output Mixer" },
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{ "Headphone PGA", NULL, "Output Mixer" },
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{ "HPOUTL", NULL, "Headphone PGA" },
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{ "HPOUTR", NULL, "Headphone PGA" },
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};
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static int wm8776_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
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{
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struct snd_soc_codec *codec = dai->codec;
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int reg, iface, master;
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switch (dai->driver->id) {
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case WM8776_DAI_DAC:
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reg = WM8776_DACIFCTRL;
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master = 0x80;
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break;
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case WM8776_DAI_ADC:
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reg = WM8776_ADCIFCTRL;
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master = 0x100;
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break;
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default:
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return -EINVAL;
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}
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iface = 0;
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switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
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case SND_SOC_DAIFMT_CBM_CFM:
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break;
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case SND_SOC_DAIFMT_CBS_CFS:
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master = 0;
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break;
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default:
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return -EINVAL;
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}
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switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
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case SND_SOC_DAIFMT_I2S:
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iface |= 0x0002;
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break;
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case SND_SOC_DAIFMT_RIGHT_J:
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break;
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case SND_SOC_DAIFMT_LEFT_J:
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iface |= 0x0001;
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break;
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default:
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return -EINVAL;
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}
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switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
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case SND_SOC_DAIFMT_NB_NF:
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break;
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case SND_SOC_DAIFMT_IB_IF:
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iface |= 0x00c;
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break;
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case SND_SOC_DAIFMT_IB_NF:
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iface |= 0x008;
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break;
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case SND_SOC_DAIFMT_NB_IF:
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iface |= 0x004;
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break;
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default:
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return -EINVAL;
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}
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/* Finally, write out the values */
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snd_soc_update_bits(codec, reg, 0xf, iface);
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snd_soc_update_bits(codec, WM8776_MSTRCTRL, 0x180, master);
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return 0;
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}
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static int mclk_ratios[] = {
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128,
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192,
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256,
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384,
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512,
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768,
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};
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static int wm8776_hw_params(struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params *params,
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struct snd_soc_dai *dai)
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{
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struct snd_soc_codec *codec = dai->codec;
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struct wm8776_priv *wm8776 = snd_soc_codec_get_drvdata(codec);
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int iface_reg, iface;
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int ratio_shift, master;
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int i;
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switch (dai->driver->id) {
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case WM8776_DAI_DAC:
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iface_reg = WM8776_DACIFCTRL;
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master = 0x80;
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ratio_shift = 4;
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break;
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case WM8776_DAI_ADC:
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iface_reg = WM8776_ADCIFCTRL;
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master = 0x100;
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ratio_shift = 0;
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break;
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default:
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return -EINVAL;
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}
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/* Set word length */
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switch (snd_pcm_format_width(params_format(params))) {
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case 16:
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iface = 0;
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break;
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case 20:
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iface = 0x10;
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break;
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case 24:
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iface = 0x20;
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break;
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case 32:
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iface = 0x30;
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break;
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default:
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dev_err(codec->dev, "Unsupported sample size: %i\n",
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snd_pcm_format_width(params_format(params)));
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return -EINVAL;
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}
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/* Only need to set MCLK/LRCLK ratio if we're master */
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if (snd_soc_read(codec, WM8776_MSTRCTRL) & master) {
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for (i = 0; i < ARRAY_SIZE(mclk_ratios); i++) {
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if (wm8776->sysclk[dai->driver->id] / params_rate(params)
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== mclk_ratios[i])
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break;
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}
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if (i == ARRAY_SIZE(mclk_ratios)) {
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dev_err(codec->dev,
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"Unable to configure MCLK ratio %d/%d\n",
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wm8776->sysclk[dai->driver->id], params_rate(params));
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return -EINVAL;
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}
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dev_dbg(codec->dev, "MCLK is %dfs\n", mclk_ratios[i]);
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snd_soc_update_bits(codec, WM8776_MSTRCTRL,
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0x7 << ratio_shift, i << ratio_shift);
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} else {
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dev_dbg(codec->dev, "DAI in slave mode\n");
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}
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snd_soc_update_bits(codec, iface_reg, 0x30, iface);
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return 0;
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}
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static int wm8776_mute(struct snd_soc_dai *dai, int mute)
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{
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struct snd_soc_codec *codec = dai->codec;
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return snd_soc_write(codec, WM8776_DACMUTE, !!mute);
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}
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static int wm8776_set_sysclk(struct snd_soc_dai *dai,
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int clk_id, unsigned int freq, int dir)
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{
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struct snd_soc_codec *codec = dai->codec;
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struct wm8776_priv *wm8776 = snd_soc_codec_get_drvdata(codec);
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if (WARN_ON(dai->driver->id >= ARRAY_SIZE(wm8776->sysclk)))
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return -EINVAL;
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wm8776->sysclk[dai->driver->id] = freq;
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return 0;
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}
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static int wm8776_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 wm8776_priv *wm8776 = snd_soc_codec_get_drvdata(codec);
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switch (level) {
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case SND_SOC_BIAS_ON:
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break;
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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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if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) {
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regcache_sync(wm8776->regmap);
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/* Disable the global powerdown; DAPM does the rest */
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snd_soc_update_bits(codec, WM8776_PWRDOWN, 1, 0);
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}
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break;
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case SND_SOC_BIAS_OFF:
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snd_soc_update_bits(codec, WM8776_PWRDOWN, 1, 1);
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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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#define WM8776_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
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SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
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static const struct snd_soc_dai_ops wm8776_dac_ops = {
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.digital_mute = wm8776_mute,
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.hw_params = wm8776_hw_params,
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.set_fmt = wm8776_set_fmt,
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.set_sysclk = wm8776_set_sysclk,
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};
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static const struct snd_soc_dai_ops wm8776_adc_ops = {
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.hw_params = wm8776_hw_params,
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.set_fmt = wm8776_set_fmt,
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.set_sysclk = wm8776_set_sysclk,
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};
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static struct snd_soc_dai_driver wm8776_dai[] = {
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{
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.name = "wm8776-hifi-playback",
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.id = WM8776_DAI_DAC,
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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_CONTINUOUS,
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.rate_min = 32000,
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.rate_max = 192000,
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.formats = WM8776_FORMATS,
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},
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.ops = &wm8776_dac_ops,
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},
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{
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.name = "wm8776-hifi-capture",
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.id = WM8776_DAI_ADC,
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.capture = {
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.stream_name = "Capture",
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.channels_min = 2,
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.channels_max = 2,
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.rates = SNDRV_PCM_RATE_CONTINUOUS,
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.rate_min = 32000,
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.rate_max = 96000,
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.formats = WM8776_FORMATS,
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},
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.ops = &wm8776_adc_ops,
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},
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};
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#ifdef CONFIG_PM
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static int wm8776_suspend(struct snd_soc_codec *codec)
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{
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wm8776_set_bias_level(codec, SND_SOC_BIAS_OFF);
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return 0;
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}
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static int wm8776_resume(struct snd_soc_codec *codec)
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{
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wm8776_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
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return 0;
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}
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#else
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#define wm8776_suspend NULL
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#define wm8776_resume NULL
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#endif
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static int wm8776_probe(struct snd_soc_codec *codec)
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{
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int ret = 0;
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ret = wm8776_reset(codec);
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if (ret < 0) {
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dev_err(codec->dev, "Failed to issue reset: %d\n", ret);
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return ret;
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}
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wm8776_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
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/* Latch the update bits; right channel only since we always
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* update both. */
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snd_soc_update_bits(codec, WM8776_HPRVOL, 0x100, 0x100);
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snd_soc_update_bits(codec, WM8776_DACRVOL, 0x100, 0x100);
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return ret;
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}
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/* power down chip */
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static int wm8776_remove(struct snd_soc_codec *codec)
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{
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wm8776_set_bias_level(codec, SND_SOC_BIAS_OFF);
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return 0;
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}
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static struct snd_soc_codec_driver soc_codec_dev_wm8776 = {
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.probe = wm8776_probe,
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.remove = wm8776_remove,
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.suspend = wm8776_suspend,
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.resume = wm8776_resume,
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.set_bias_level = wm8776_set_bias_level,
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.controls = wm8776_snd_controls,
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.num_controls = ARRAY_SIZE(wm8776_snd_controls),
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.dapm_widgets = wm8776_dapm_widgets,
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.num_dapm_widgets = ARRAY_SIZE(wm8776_dapm_widgets),
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.dapm_routes = routes,
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.num_dapm_routes = ARRAY_SIZE(routes),
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};
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static const struct of_device_id wm8776_of_match[] = {
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{ .compatible = "wlf,wm8776", },
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{ }
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};
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MODULE_DEVICE_TABLE(of, wm8776_of_match);
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static const struct regmap_config wm8776_regmap = {
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.reg_bits = 7,
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.val_bits = 9,
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.max_register = WM8776_RESET,
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.reg_defaults = wm8776_reg_defaults,
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.num_reg_defaults = ARRAY_SIZE(wm8776_reg_defaults),
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.cache_type = REGCACHE_RBTREE,
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.volatile_reg = wm8776_volatile,
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};
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#if defined(CONFIG_SPI_MASTER)
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static int wm8776_spi_probe(struct spi_device *spi)
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{
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struct wm8776_priv *wm8776;
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int ret;
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wm8776 = devm_kzalloc(&spi->dev, sizeof(struct wm8776_priv),
|
|
GFP_KERNEL);
|
|
if (wm8776 == NULL)
|
|
return -ENOMEM;
|
|
|
|
wm8776->regmap = devm_regmap_init_spi(spi, &wm8776_regmap);
|
|
if (IS_ERR(wm8776->regmap))
|
|
return PTR_ERR(wm8776->regmap);
|
|
|
|
spi_set_drvdata(spi, wm8776);
|
|
|
|
ret = snd_soc_register_codec(&spi->dev,
|
|
&soc_codec_dev_wm8776, wm8776_dai, ARRAY_SIZE(wm8776_dai));
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int wm8776_spi_remove(struct spi_device *spi)
|
|
{
|
|
snd_soc_unregister_codec(&spi->dev);
|
|
return 0;
|
|
}
|
|
|
|
static struct spi_driver wm8776_spi_driver = {
|
|
.driver = {
|
|
.name = "wm8776",
|
|
.owner = THIS_MODULE,
|
|
.of_match_table = wm8776_of_match,
|
|
},
|
|
.probe = wm8776_spi_probe,
|
|
.remove = wm8776_spi_remove,
|
|
};
|
|
#endif /* CONFIG_SPI_MASTER */
|
|
|
|
#if IS_ENABLED(CONFIG_I2C)
|
|
static int wm8776_i2c_probe(struct i2c_client *i2c,
|
|
const struct i2c_device_id *id)
|
|
{
|
|
struct wm8776_priv *wm8776;
|
|
int ret;
|
|
|
|
wm8776 = devm_kzalloc(&i2c->dev, sizeof(struct wm8776_priv),
|
|
GFP_KERNEL);
|
|
if (wm8776 == NULL)
|
|
return -ENOMEM;
|
|
|
|
wm8776->regmap = devm_regmap_init_i2c(i2c, &wm8776_regmap);
|
|
if (IS_ERR(wm8776->regmap))
|
|
return PTR_ERR(wm8776->regmap);
|
|
|
|
i2c_set_clientdata(i2c, wm8776);
|
|
|
|
ret = snd_soc_register_codec(&i2c->dev,
|
|
&soc_codec_dev_wm8776, wm8776_dai, ARRAY_SIZE(wm8776_dai));
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int wm8776_i2c_remove(struct i2c_client *client)
|
|
{
|
|
snd_soc_unregister_codec(&client->dev);
|
|
return 0;
|
|
}
|
|
|
|
static const struct i2c_device_id wm8776_i2c_id[] = {
|
|
{ "wm8775", WM8775 },
|
|
{ "wm8776", WM8776 },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(i2c, wm8776_i2c_id);
|
|
|
|
static struct i2c_driver wm8776_i2c_driver = {
|
|
.driver = {
|
|
.name = "wm8776",
|
|
.owner = THIS_MODULE,
|
|
.of_match_table = wm8776_of_match,
|
|
},
|
|
.probe = wm8776_i2c_probe,
|
|
.remove = wm8776_i2c_remove,
|
|
.id_table = wm8776_i2c_id,
|
|
};
|
|
#endif
|
|
|
|
static int __init wm8776_modinit(void)
|
|
{
|
|
int ret = 0;
|
|
#if IS_ENABLED(CONFIG_I2C)
|
|
ret = i2c_add_driver(&wm8776_i2c_driver);
|
|
if (ret != 0) {
|
|
printk(KERN_ERR "Failed to register wm8776 I2C driver: %d\n",
|
|
ret);
|
|
}
|
|
#endif
|
|
#if defined(CONFIG_SPI_MASTER)
|
|
ret = spi_register_driver(&wm8776_spi_driver);
|
|
if (ret != 0) {
|
|
printk(KERN_ERR "Failed to register wm8776 SPI driver: %d\n",
|
|
ret);
|
|
}
|
|
#endif
|
|
return ret;
|
|
}
|
|
module_init(wm8776_modinit);
|
|
|
|
static void __exit wm8776_exit(void)
|
|
{
|
|
#if IS_ENABLED(CONFIG_I2C)
|
|
i2c_del_driver(&wm8776_i2c_driver);
|
|
#endif
|
|
#if defined(CONFIG_SPI_MASTER)
|
|
spi_unregister_driver(&wm8776_spi_driver);
|
|
#endif
|
|
}
|
|
module_exit(wm8776_exit);
|
|
|
|
MODULE_DESCRIPTION("ASoC WM8776 driver");
|
|
MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
|
|
MODULE_LICENSE("GPL");
|