367 lines
8.9 KiB
C
367 lines
8.9 KiB
C
/*
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* max9850.c -- codec driver for max9850
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*
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* Copyright (C) 2011 taskit GmbH
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*
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* Author: Christian Glindkamp <christian.glindkamp@taskit.de>
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*
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* Initial development of this code was funded by
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* MICRONIC Computer Systeme GmbH, http://www.mcsberlin.de/
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/i2c.h>
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#include <linux/regmap.h>
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#include <linux/slab.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/tlv.h>
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#include "max9850.h"
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struct max9850_priv {
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struct regmap *regmap;
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unsigned int sysclk;
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};
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/* max9850 register cache */
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static const struct reg_default max9850_reg[] = {
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{ 2, 0x0c },
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{ 3, 0x00 },
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{ 4, 0x00 },
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{ 5, 0x00 },
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{ 6, 0x00 },
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{ 7, 0x00 },
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{ 8, 0x00 },
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{ 9, 0x00 },
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{ 10, 0x00 },
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};
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/* these registers are not used at the moment but provided for the sake of
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* completeness */
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static bool max9850_volatile_register(struct device *dev, unsigned int reg)
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{
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switch (reg) {
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case MAX9850_STATUSA:
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case MAX9850_STATUSB:
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return 1;
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default:
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return 0;
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}
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}
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static const struct regmap_config max9850_regmap = {
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.reg_bits = 8,
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.val_bits = 8,
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.max_register = MAX9850_DIGITAL_AUDIO,
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.volatile_reg = max9850_volatile_register,
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.cache_type = REGCACHE_RBTREE,
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};
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static const DECLARE_TLV_DB_RANGE(max9850_tlv,
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0x18, 0x1f, TLV_DB_SCALE_ITEM(-7450, 400, 0),
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0x20, 0x33, TLV_DB_SCALE_ITEM(-4150, 200, 0),
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0x34, 0x37, TLV_DB_SCALE_ITEM(-150, 100, 0),
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0x38, 0x3f, TLV_DB_SCALE_ITEM(250, 50, 0)
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);
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static const struct snd_kcontrol_new max9850_controls[] = {
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SOC_SINGLE_TLV("Headphone Volume", MAX9850_VOLUME, 0, 0x3f, 1, max9850_tlv),
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SOC_SINGLE("Headphone Switch", MAX9850_VOLUME, 7, 1, 1),
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SOC_SINGLE("Mono Switch", MAX9850_GENERAL_PURPOSE, 2, 1, 0),
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};
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static const struct snd_kcontrol_new max9850_mixer_controls[] = {
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SOC_DAPM_SINGLE("Line In Switch", MAX9850_ENABLE, 1, 1, 0),
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};
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static const struct snd_soc_dapm_widget max9850_dapm_widgets[] = {
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SND_SOC_DAPM_SUPPLY("Charge Pump 1", MAX9850_ENABLE, 4, 0, NULL, 0),
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SND_SOC_DAPM_SUPPLY("Charge Pump 2", MAX9850_ENABLE, 5, 0, NULL, 0),
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SND_SOC_DAPM_SUPPLY("MCLK", MAX9850_ENABLE, 6, 0, NULL, 0),
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SND_SOC_DAPM_SUPPLY("SHDN", MAX9850_ENABLE, 7, 0, NULL, 0),
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SND_SOC_DAPM_MIXER_NAMED_CTL("Output Mixer", MAX9850_ENABLE, 2, 0,
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&max9850_mixer_controls[0],
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ARRAY_SIZE(max9850_mixer_controls)),
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SND_SOC_DAPM_PGA("Headphone Output", MAX9850_ENABLE, 3, 0, NULL, 0),
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SND_SOC_DAPM_DAC("DAC", "HiFi Playback", MAX9850_ENABLE, 0, 0),
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SND_SOC_DAPM_OUTPUT("OUTL"),
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SND_SOC_DAPM_OUTPUT("HPL"),
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SND_SOC_DAPM_OUTPUT("OUTR"),
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SND_SOC_DAPM_OUTPUT("HPR"),
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SND_SOC_DAPM_MIXER("Line Input", SND_SOC_NOPM, 0, 0, NULL, 0),
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SND_SOC_DAPM_INPUT("INL"),
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SND_SOC_DAPM_INPUT("INR"),
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};
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static const struct snd_soc_dapm_route max9850_dapm_routes[] = {
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/* output mixer */
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{"Output Mixer", NULL, "DAC"},
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{"Output Mixer", "Line In Switch", "Line Input"},
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/* outputs */
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{"Headphone Output", NULL, "Output Mixer"},
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{"HPL", NULL, "Headphone Output"},
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{"HPR", NULL, "Headphone Output"},
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{"OUTL", NULL, "Output Mixer"},
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{"OUTR", NULL, "Output Mixer"},
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/* inputs */
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{"Line Input", NULL, "INL"},
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{"Line Input", NULL, "INR"},
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/* supplies */
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{"Output Mixer", NULL, "Charge Pump 1"},
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{"Output Mixer", NULL, "Charge Pump 2"},
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{"Output Mixer", NULL, "SHDN"},
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{"DAC", NULL, "MCLK"},
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};
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static int max9850_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 max9850_priv *max9850 = snd_soc_codec_get_drvdata(codec);
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u64 lrclk_div;
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u8 sf, da;
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if (!max9850->sysclk)
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return -EINVAL;
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/* lrclk_div = 2^22 * rate / iclk with iclk = mclk / sf */
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sf = (snd_soc_read(codec, MAX9850_CLOCK) >> 2) + 1;
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lrclk_div = (1 << 22);
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lrclk_div *= params_rate(params);
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lrclk_div *= sf;
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do_div(lrclk_div, max9850->sysclk);
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snd_soc_write(codec, MAX9850_LRCLK_MSB, (lrclk_div >> 8) & 0x7f);
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snd_soc_write(codec, MAX9850_LRCLK_LSB, lrclk_div & 0xff);
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switch (params_width(params)) {
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case 16:
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da = 0;
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break;
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case 20:
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da = 0x2;
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break;
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case 24:
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da = 0x3;
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break;
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default:
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return -EINVAL;
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}
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snd_soc_update_bits(codec, MAX9850_DIGITAL_AUDIO, 0x3, da);
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return 0;
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}
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static int max9850_set_dai_sysclk(struct snd_soc_dai *codec_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 = codec_dai->codec;
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struct max9850_priv *max9850 = snd_soc_codec_get_drvdata(codec);
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/* calculate mclk -> iclk divider */
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if (freq <= 13000000)
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snd_soc_write(codec, MAX9850_CLOCK, 0x0);
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else if (freq <= 26000000)
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snd_soc_write(codec, MAX9850_CLOCK, 0x4);
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else if (freq <= 40000000)
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snd_soc_write(codec, MAX9850_CLOCK, 0x8);
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else
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return -EINVAL;
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max9850->sysclk = freq;
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return 0;
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}
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static int max9850_set_dai_fmt(struct snd_soc_dai *codec_dai, unsigned int fmt)
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{
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struct snd_soc_codec *codec = codec_dai->codec;
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u8 da = 0;
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/* set master/slave audio interface */
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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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da |= MAX9850_MASTER;
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break;
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case SND_SOC_DAIFMT_CBS_CFS:
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break;
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default:
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return -EINVAL;
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}
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/* interface format */
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switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
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case SND_SOC_DAIFMT_I2S:
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da |= MAX9850_DLY;
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break;
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case SND_SOC_DAIFMT_RIGHT_J:
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da |= MAX9850_RTJ;
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break;
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case SND_SOC_DAIFMT_LEFT_J:
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break;
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default:
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return -EINVAL;
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}
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/* clock inversion */
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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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da |= MAX9850_BCINV | MAX9850_INV;
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break;
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case SND_SOC_DAIFMT_IB_NF:
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da |= MAX9850_BCINV;
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break;
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case SND_SOC_DAIFMT_NB_IF:
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da |= MAX9850_INV;
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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 da */
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snd_soc_write(codec, MAX9850_DIGITAL_AUDIO, da);
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return 0;
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}
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static int max9850_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 max9850_priv *max9850 = snd_soc_codec_get_drvdata(codec);
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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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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 (snd_soc_codec_get_bias_level(codec) == SND_SOC_BIAS_OFF) {
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ret = regcache_sync(max9850->regmap);
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if (ret) {
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dev_err(codec->dev,
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"Failed to sync cache: %d\n", ret);
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return ret;
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}
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}
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break;
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case SND_SOC_BIAS_OFF:
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break;
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}
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return 0;
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}
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#define MAX9850_RATES SNDRV_PCM_RATE_8000_48000
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#define MAX9850_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
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SNDRV_PCM_FMTBIT_S24_LE)
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static const struct snd_soc_dai_ops max9850_dai_ops = {
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.hw_params = max9850_hw_params,
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.set_sysclk = max9850_set_dai_sysclk,
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.set_fmt = max9850_set_dai_fmt,
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};
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static struct snd_soc_dai_driver max9850_dai = {
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.name = "max9850-hifi",
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.playback = {
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.stream_name = "Playback",
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.channels_min = 1,
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.channels_max = 2,
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.rates = MAX9850_RATES,
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.formats = MAX9850_FORMATS
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},
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.ops = &max9850_dai_ops,
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};
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static int max9850_probe(struct snd_soc_codec *codec)
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{
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/* enable zero-detect */
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snd_soc_update_bits(codec, MAX9850_GENERAL_PURPOSE, 1, 1);
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/* enable slew-rate control */
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snd_soc_update_bits(codec, MAX9850_VOLUME, 0x40, 0x40);
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/* set slew-rate 125ms */
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snd_soc_update_bits(codec, MAX9850_CHARGE_PUMP, 0xff, 0xc0);
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return 0;
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}
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static const struct snd_soc_codec_driver soc_codec_dev_max9850 = {
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.probe = max9850_probe,
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.set_bias_level = max9850_set_bias_level,
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.suspend_bias_off = true,
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.component_driver = {
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.controls = max9850_controls,
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.num_controls = ARRAY_SIZE(max9850_controls),
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.dapm_widgets = max9850_dapm_widgets,
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.num_dapm_widgets = ARRAY_SIZE(max9850_dapm_widgets),
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.dapm_routes = max9850_dapm_routes,
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.num_dapm_routes = ARRAY_SIZE(max9850_dapm_routes),
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},
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};
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static int max9850_i2c_probe(struct i2c_client *i2c,
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const struct i2c_device_id *id)
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{
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struct max9850_priv *max9850;
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int ret;
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max9850 = devm_kzalloc(&i2c->dev, sizeof(struct max9850_priv),
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GFP_KERNEL);
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if (max9850 == NULL)
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return -ENOMEM;
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max9850->regmap = devm_regmap_init_i2c(i2c, &max9850_regmap);
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if (IS_ERR(max9850->regmap))
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return PTR_ERR(max9850->regmap);
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i2c_set_clientdata(i2c, max9850);
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ret = snd_soc_register_codec(&i2c->dev,
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&soc_codec_dev_max9850, &max9850_dai, 1);
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return ret;
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}
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static int max9850_i2c_remove(struct i2c_client *client)
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{
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snd_soc_unregister_codec(&client->dev);
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return 0;
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}
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static const struct i2c_device_id max9850_i2c_id[] = {
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{ "max9850", 0 },
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, max9850_i2c_id);
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static struct i2c_driver max9850_i2c_driver = {
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.driver = {
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.name = "max9850",
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},
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.probe = max9850_i2c_probe,
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.remove = max9850_i2c_remove,
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.id_table = max9850_i2c_id,
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};
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module_i2c_driver(max9850_i2c_driver);
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MODULE_AUTHOR("Christian Glindkamp <christian.glindkamp@taskit.de>");
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MODULE_DESCRIPTION("ASoC MAX9850 codec driver");
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MODULE_LICENSE("GPL");
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