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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * max9850.c  --  codec driver for max98504 *5 * Copyright (C) 2011 taskit GmbH6 *7 * Author: Christian Glindkamp <christian.glindkamp@taskit.de>8 *9 * Initial development of this code was funded by10 * MICRONIC Computer Systeme GmbH, https://www.mcsberlin.de/11 */12 13#include <linux/module.h>14#include <linux/init.h>15#include <linux/i2c.h>16#include <linux/regmap.h>17#include <linux/slab.h>18#include <sound/pcm.h>19#include <sound/pcm_params.h>20#include <sound/soc.h>21#include <sound/tlv.h>22 23#include "max9850.h"24 25struct max9850_priv {26	struct regmap *regmap;27	unsigned int sysclk;28};29 30/* these registers are not used at the moment but provided for the sake of31 * completeness */32static bool max9850_volatile_register(struct device *dev, unsigned int reg)33{34	switch (reg) {35	case MAX9850_STATUSA:36	case MAX9850_STATUSB:37		return true;38	default:39		return false;40	}41}42 43static const struct regmap_config max9850_regmap = {44	.reg_bits = 8,45	.val_bits = 8,46 47	.max_register = MAX9850_DIGITAL_AUDIO,48	.volatile_reg = max9850_volatile_register,49	.cache_type = REGCACHE_RBTREE,50};51 52static const DECLARE_TLV_DB_RANGE(max9850_tlv,53	0x18, 0x1f, TLV_DB_SCALE_ITEM(-7450, 400, 0),54	0x20, 0x33, TLV_DB_SCALE_ITEM(-4150, 200, 0),55	0x34, 0x37, TLV_DB_SCALE_ITEM(-150, 100, 0),56	0x38, 0x3f, TLV_DB_SCALE_ITEM(250, 50, 0)57);58 59static const struct snd_kcontrol_new max9850_controls[] = {60SOC_SINGLE_TLV("Headphone Volume", MAX9850_VOLUME, 0, 0x3f, 1, max9850_tlv),61SOC_SINGLE("Headphone Switch", MAX9850_VOLUME, 7, 1, 1),62SOC_SINGLE("Mono Switch", MAX9850_GENERAL_PURPOSE, 2, 1, 0),63};64 65static const struct snd_kcontrol_new max9850_mixer_controls[] = {66	SOC_DAPM_SINGLE("Line In Switch", MAX9850_ENABLE, 1, 1, 0),67};68 69static const struct snd_soc_dapm_widget max9850_dapm_widgets[] = {70SND_SOC_DAPM_SUPPLY("Charge Pump 1", MAX9850_ENABLE, 4, 0, NULL, 0),71SND_SOC_DAPM_SUPPLY("Charge Pump 2", MAX9850_ENABLE, 5, 0, NULL, 0),72SND_SOC_DAPM_SUPPLY("MCLK", MAX9850_ENABLE, 6, 0, NULL, 0),73SND_SOC_DAPM_SUPPLY("SHDN", MAX9850_ENABLE, 7, 0, NULL, 0),74SND_SOC_DAPM_MIXER_NAMED_CTL("Output Mixer", MAX9850_ENABLE, 2, 0,75		&max9850_mixer_controls[0],76		ARRAY_SIZE(max9850_mixer_controls)),77SND_SOC_DAPM_PGA("Headphone Output", MAX9850_ENABLE, 3, 0, NULL, 0),78SND_SOC_DAPM_DAC("DAC", "HiFi Playback", MAX9850_ENABLE, 0, 0),79SND_SOC_DAPM_OUTPUT("OUTL"),80SND_SOC_DAPM_OUTPUT("HPL"),81SND_SOC_DAPM_OUTPUT("OUTR"),82SND_SOC_DAPM_OUTPUT("HPR"),83SND_SOC_DAPM_MIXER("Line Input", SND_SOC_NOPM, 0, 0, NULL, 0),84SND_SOC_DAPM_INPUT("INL"),85SND_SOC_DAPM_INPUT("INR"),86};87 88static const struct snd_soc_dapm_route max9850_dapm_routes[] = {89	/* output mixer */90	{"Output Mixer", NULL, "DAC"},91	{"Output Mixer", "Line In Switch", "Line Input"},92 93	/* outputs */94	{"Headphone Output", NULL, "Output Mixer"},95	{"HPL", NULL, "Headphone Output"},96	{"HPR", NULL, "Headphone Output"},97	{"OUTL", NULL, "Output Mixer"},98	{"OUTR", NULL, "Output Mixer"},99 100	/* inputs */101	{"Line Input", NULL, "INL"},102	{"Line Input", NULL, "INR"},103 104	/* supplies */105	{"Output Mixer", NULL, "Charge Pump 1"},106	{"Output Mixer", NULL, "Charge Pump 2"},107	{"Output Mixer", NULL, "SHDN"},108	{"DAC", NULL, "MCLK"},109};110 111static int max9850_hw_params(struct snd_pcm_substream *substream,112			     struct snd_pcm_hw_params *params,113			     struct snd_soc_dai *dai)114{115	struct snd_soc_component *component = dai->component;116	struct max9850_priv *max9850 = snd_soc_component_get_drvdata(component);117	u64 lrclk_div;118	u8 sf, da;119 120	if (!max9850->sysclk)121		return -EINVAL;122 123	/* lrclk_div = 2^22 * rate / iclk with iclk = mclk / sf */124	sf = (snd_soc_component_read(component, MAX9850_CLOCK) >> 2) + 1;125	lrclk_div = (1 << 22);126	lrclk_div *= params_rate(params);127	lrclk_div *= sf;128	do_div(lrclk_div, max9850->sysclk);129 130	snd_soc_component_write(component, MAX9850_LRCLK_MSB, (lrclk_div >> 8) & 0x7f);131	snd_soc_component_write(component, MAX9850_LRCLK_LSB, lrclk_div & 0xff);132 133	switch (params_width(params)) {134	case 16:135		da = 0;136		break;137	case 20:138		da = 0x2;139		break;140	case 24:141		da = 0x3;142		break;143	default:144		return -EINVAL;145	}146	snd_soc_component_update_bits(component, MAX9850_DIGITAL_AUDIO, 0x3, da);147 148	return 0;149}150 151static int max9850_set_dai_sysclk(struct snd_soc_dai *codec_dai,152		int clk_id, unsigned int freq, int dir)153{154	struct snd_soc_component *component = codec_dai->component;155	struct max9850_priv *max9850 = snd_soc_component_get_drvdata(component);156 157	/* calculate mclk -> iclk divider */158	if (freq <= 13000000)159		snd_soc_component_write(component, MAX9850_CLOCK, 0x0);160	else if (freq <= 26000000)161		snd_soc_component_write(component, MAX9850_CLOCK, 0x4);162	else if (freq <= 40000000)163		snd_soc_component_write(component, MAX9850_CLOCK, 0x8);164	else165		return -EINVAL;166 167	max9850->sysclk = freq;168	return 0;169}170 171static int max9850_set_dai_fmt(struct snd_soc_dai *codec_dai, unsigned int fmt)172{173	struct snd_soc_component *component = codec_dai->component;174	u8 da = 0;175 176	/* set clock provider for audio interface */177	switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) {178	case SND_SOC_DAIFMT_CBP_CFP:179		da |= MAX9850_MASTER;180		break;181	case SND_SOC_DAIFMT_CBC_CFC:182		break;183	default:184		return -EINVAL;185	}186 187	/* interface format */188	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {189	case SND_SOC_DAIFMT_I2S:190		da |= MAX9850_DLY;191		break;192	case SND_SOC_DAIFMT_RIGHT_J:193		da |= MAX9850_RTJ;194		break;195	case SND_SOC_DAIFMT_LEFT_J:196		break;197	default:198		return -EINVAL;199	}200 201	/* clock inversion */202	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {203	case SND_SOC_DAIFMT_NB_NF:204		break;205	case SND_SOC_DAIFMT_IB_IF:206		da |= MAX9850_BCINV | MAX9850_INV;207		break;208	case SND_SOC_DAIFMT_IB_NF:209		da |= MAX9850_BCINV;210		break;211	case SND_SOC_DAIFMT_NB_IF:212		da |= MAX9850_INV;213		break;214	default:215		return -EINVAL;216	}217 218	/* set da */219	snd_soc_component_write(component, MAX9850_DIGITAL_AUDIO, da);220 221	return 0;222}223 224static int max9850_set_bias_level(struct snd_soc_component *component,225				  enum snd_soc_bias_level level)226{227	struct max9850_priv *max9850 = snd_soc_component_get_drvdata(component);228	int ret;229 230	switch (level) {231	case SND_SOC_BIAS_ON:232		break;233	case SND_SOC_BIAS_PREPARE:234		break;235	case SND_SOC_BIAS_STANDBY:236		if (snd_soc_component_get_bias_level(component) == SND_SOC_BIAS_OFF) {237			ret = regcache_sync(max9850->regmap);238			if (ret) {239				dev_err(component->dev,240					"Failed to sync cache: %d\n", ret);241				return ret;242			}243		}244		break;245	case SND_SOC_BIAS_OFF:246		break;247	}248	return 0;249}250 251#define MAX9850_RATES SNDRV_PCM_RATE_8000_48000252 253#define MAX9850_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\254	SNDRV_PCM_FMTBIT_S24_LE)255 256static const struct snd_soc_dai_ops max9850_dai_ops = {257	.hw_params	= max9850_hw_params,258	.set_sysclk	= max9850_set_dai_sysclk,259	.set_fmt	= max9850_set_dai_fmt,260};261 262static struct snd_soc_dai_driver max9850_dai = {263	.name = "max9850-hifi",264	.playback = {265		.stream_name = "Playback",266		.channels_min = 1,267		.channels_max = 2,268		.rates = MAX9850_RATES,269		.formats = MAX9850_FORMATS270	},271	.ops = &max9850_dai_ops,272};273 274static int max9850_probe(struct snd_soc_component *component)275{276	/* enable zero-detect */277	snd_soc_component_update_bits(component, MAX9850_GENERAL_PURPOSE, 1, 1);278	/* enable slew-rate control */279	snd_soc_component_update_bits(component, MAX9850_VOLUME, 0x40, 0x40);280	/* set slew-rate 125ms */281	snd_soc_component_update_bits(component, MAX9850_CHARGE_PUMP, 0xff, 0xc0);282 283	return 0;284}285 286static const struct snd_soc_component_driver soc_component_dev_max9850 = {287	.probe			= max9850_probe,288	.set_bias_level		= max9850_set_bias_level,289	.controls		= max9850_controls,290	.num_controls		= ARRAY_SIZE(max9850_controls),291	.dapm_widgets		= max9850_dapm_widgets,292	.num_dapm_widgets	= ARRAY_SIZE(max9850_dapm_widgets),293	.dapm_routes		= max9850_dapm_routes,294	.num_dapm_routes	= ARRAY_SIZE(max9850_dapm_routes),295	.suspend_bias_off	= 1,296	.idle_bias_on		= 1,297	.use_pmdown_time	= 1,298	.endianness		= 1,299};300 301static int max9850_i2c_probe(struct i2c_client *i2c)302{303	struct max9850_priv *max9850;304	int ret;305 306	max9850 = devm_kzalloc(&i2c->dev, sizeof(struct max9850_priv),307			       GFP_KERNEL);308	if (max9850 == NULL)309		return -ENOMEM;310 311	max9850->regmap = devm_regmap_init_i2c(i2c, &max9850_regmap);312	if (IS_ERR(max9850->regmap))313		return PTR_ERR(max9850->regmap);314 315	i2c_set_clientdata(i2c, max9850);316 317	ret = devm_snd_soc_register_component(&i2c->dev,318			&soc_component_dev_max9850, &max9850_dai, 1);319	return ret;320}321 322static const struct i2c_device_id max9850_i2c_id[] = {323	{ "max9850" },324	{ }325};326MODULE_DEVICE_TABLE(i2c, max9850_i2c_id);327 328static struct i2c_driver max9850_i2c_driver = {329	.driver = {330		.name = "max9850",331	},332	.probe = max9850_i2c_probe,333	.id_table = max9850_i2c_id,334};335 336module_i2c_driver(max9850_i2c_driver);337 338MODULE_AUTHOR("Christian Glindkamp <christian.glindkamp@taskit.de>");339MODULE_DESCRIPTION("ASoC MAX9850 codec driver");340MODULE_LICENSE("GPL");341