2 * max9850.c -- codec driver for max9850
4 * Copyright (C) 2011 taskit GmbH
6 * Author: Christian Glindkamp <christian.glindkamp@taskit.de>
8 * Initial development of this code was funded by
9 * MICRONIC Computer Systeme GmbH, http://www.mcsberlin.de/
11 * This program is free software; you can redistribute it and/or modify it
12 * under the terms of the GNU General Public License as published by the
13 * Free Software Foundation; either version 2 of the License, or (at your
14 * option) any later version.
18 #include <linux/module.h>
19 #include <linux/init.h>
20 #include <linux/i2c.h>
21 #include <linux/regmap.h>
22 #include <linux/slab.h>
23 #include <sound/pcm.h>
24 #include <sound/pcm_params.h>
25 #include <sound/soc.h>
26 #include <sound/tlv.h>
31 struct regmap *regmap;
35 /* max9850 register cache */
36 static const struct reg_default max9850_reg[] = {
48 /* these registers are not used at the moment but provided for the sake of
50 static bool max9850_volatile_register(struct device *dev, unsigned int reg)
61 static const struct regmap_config max9850_regmap = {
65 .max_register = MAX9850_DIGITAL_AUDIO,
66 .volatile_reg = max9850_volatile_register,
67 .cache_type = REGCACHE_RBTREE,
70 static const unsigned int max9850_tlv[] = {
72 0x18, 0x1f, TLV_DB_SCALE_ITEM(-7450, 400, 0),
73 0x20, 0x33, TLV_DB_SCALE_ITEM(-4150, 200, 0),
74 0x34, 0x37, TLV_DB_SCALE_ITEM(-150, 100, 0),
75 0x38, 0x3f, TLV_DB_SCALE_ITEM(250, 50, 0),
78 static const struct snd_kcontrol_new max9850_controls[] = {
79 SOC_SINGLE_TLV("Headphone Volume", MAX9850_VOLUME, 0, 0x3f, 1, max9850_tlv),
80 SOC_SINGLE("Headphone Switch", MAX9850_VOLUME, 7, 1, 1),
81 SOC_SINGLE("Mono Switch", MAX9850_GENERAL_PURPOSE, 2, 1, 0),
84 static const struct snd_kcontrol_new max9850_mixer_controls[] = {
85 SOC_DAPM_SINGLE("Line In Switch", MAX9850_ENABLE, 1, 1, 0),
88 static const struct snd_soc_dapm_widget max9850_dapm_widgets[] = {
89 SND_SOC_DAPM_SUPPLY("Charge Pump 1", MAX9850_ENABLE, 4, 0, NULL, 0),
90 SND_SOC_DAPM_SUPPLY("Charge Pump 2", MAX9850_ENABLE, 5, 0, NULL, 0),
91 SND_SOC_DAPM_SUPPLY("MCLK", MAX9850_ENABLE, 6, 0, NULL, 0),
92 SND_SOC_DAPM_SUPPLY("SHDN", MAX9850_ENABLE, 7, 0, NULL, 0),
93 SND_SOC_DAPM_MIXER_NAMED_CTL("Output Mixer", MAX9850_ENABLE, 2, 0,
94 &max9850_mixer_controls[0],
95 ARRAY_SIZE(max9850_mixer_controls)),
96 SND_SOC_DAPM_PGA("Headphone Output", MAX9850_ENABLE, 3, 0, NULL, 0),
97 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", MAX9850_ENABLE, 0, 0),
98 SND_SOC_DAPM_OUTPUT("OUTL"),
99 SND_SOC_DAPM_OUTPUT("HPL"),
100 SND_SOC_DAPM_OUTPUT("OUTR"),
101 SND_SOC_DAPM_OUTPUT("HPR"),
102 SND_SOC_DAPM_MIXER("Line Input", SND_SOC_NOPM, 0, 0, NULL, 0),
103 SND_SOC_DAPM_INPUT("INL"),
104 SND_SOC_DAPM_INPUT("INR"),
107 static const struct snd_soc_dapm_route max9850_dapm_routes[] = {
109 {"Output Mixer", NULL, "DAC"},
110 {"Output Mixer", "Line In Switch", "Line Input"},
113 {"Headphone Output", NULL, "Output Mixer"},
114 {"HPL", NULL, "Headphone Output"},
115 {"HPR", NULL, "Headphone Output"},
116 {"OUTL", NULL, "Output Mixer"},
117 {"OUTR", NULL, "Output Mixer"},
120 {"Line Input", NULL, "INL"},
121 {"Line Input", NULL, "INR"},
124 {"Output Mixer", NULL, "Charge Pump 1"},
125 {"Output Mixer", NULL, "Charge Pump 2"},
126 {"Output Mixer", NULL, "SHDN"},
127 {"DAC", NULL, "MCLK"},
130 static int max9850_hw_params(struct snd_pcm_substream *substream,
131 struct snd_pcm_hw_params *params,
132 struct snd_soc_dai *dai)
134 struct snd_soc_codec *codec = dai->codec;
135 struct max9850_priv *max9850 = snd_soc_codec_get_drvdata(codec);
139 if (!max9850->sysclk)
142 /* lrclk_div = 2^22 * rate / iclk with iclk = mclk / sf */
143 sf = (snd_soc_read(codec, MAX9850_CLOCK) >> 2) + 1;
144 lrclk_div = (1 << 22);
145 lrclk_div *= params_rate(params);
147 do_div(lrclk_div, max9850->sysclk);
149 snd_soc_write(codec, MAX9850_LRCLK_MSB, (lrclk_div >> 8) & 0x7f);
150 snd_soc_write(codec, MAX9850_LRCLK_LSB, lrclk_div & 0xff);
152 switch (params_width(params)) {
165 snd_soc_update_bits(codec, MAX9850_DIGITAL_AUDIO, 0x3, da);
170 static int max9850_set_dai_sysclk(struct snd_soc_dai *codec_dai,
171 int clk_id, unsigned int freq, int dir)
173 struct snd_soc_codec *codec = codec_dai->codec;
174 struct max9850_priv *max9850 = snd_soc_codec_get_drvdata(codec);
176 /* calculate mclk -> iclk divider */
177 if (freq <= 13000000)
178 snd_soc_write(codec, MAX9850_CLOCK, 0x0);
179 else if (freq <= 26000000)
180 snd_soc_write(codec, MAX9850_CLOCK, 0x4);
181 else if (freq <= 40000000)
182 snd_soc_write(codec, MAX9850_CLOCK, 0x8);
186 max9850->sysclk = freq;
190 static int max9850_set_dai_fmt(struct snd_soc_dai *codec_dai, unsigned int fmt)
192 struct snd_soc_codec *codec = codec_dai->codec;
195 /* set master/slave audio interface */
196 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
197 case SND_SOC_DAIFMT_CBM_CFM:
198 da |= MAX9850_MASTER;
200 case SND_SOC_DAIFMT_CBS_CFS:
206 /* interface format */
207 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
208 case SND_SOC_DAIFMT_I2S:
211 case SND_SOC_DAIFMT_RIGHT_J:
214 case SND_SOC_DAIFMT_LEFT_J:
220 /* clock inversion */
221 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
222 case SND_SOC_DAIFMT_NB_NF:
224 case SND_SOC_DAIFMT_IB_IF:
225 da |= MAX9850_BCINV | MAX9850_INV;
227 case SND_SOC_DAIFMT_IB_NF:
230 case SND_SOC_DAIFMT_NB_IF:
238 snd_soc_write(codec, MAX9850_DIGITAL_AUDIO, da);
243 static int max9850_set_bias_level(struct snd_soc_codec *codec,
244 enum snd_soc_bias_level level)
246 struct max9850_priv *max9850 = snd_soc_codec_get_drvdata(codec);
250 case SND_SOC_BIAS_ON:
252 case SND_SOC_BIAS_PREPARE:
254 case SND_SOC_BIAS_STANDBY:
255 if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) {
256 ret = regcache_sync(max9850->regmap);
259 "Failed to sync cache: %d\n", ret);
264 case SND_SOC_BIAS_OFF:
267 codec->dapm.bias_level = level;
271 #define MAX9850_RATES SNDRV_PCM_RATE_8000_48000
273 #define MAX9850_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
274 SNDRV_PCM_FMTBIT_S24_LE)
276 static const struct snd_soc_dai_ops max9850_dai_ops = {
277 .hw_params = max9850_hw_params,
278 .set_sysclk = max9850_set_dai_sysclk,
279 .set_fmt = max9850_set_dai_fmt,
282 static struct snd_soc_dai_driver max9850_dai = {
283 .name = "max9850-hifi",
285 .stream_name = "Playback",
288 .rates = MAX9850_RATES,
289 .formats = MAX9850_FORMATS
291 .ops = &max9850_dai_ops,
294 static int max9850_probe(struct snd_soc_codec *codec)
296 /* enable zero-detect */
297 snd_soc_update_bits(codec, MAX9850_GENERAL_PURPOSE, 1, 1);
298 /* enable slew-rate control */
299 snd_soc_update_bits(codec, MAX9850_VOLUME, 0x40, 0x40);
300 /* set slew-rate 125ms */
301 snd_soc_update_bits(codec, MAX9850_CHARGE_PUMP, 0xff, 0xc0);
306 static struct snd_soc_codec_driver soc_codec_dev_max9850 = {
307 .probe = max9850_probe,
308 .set_bias_level = max9850_set_bias_level,
309 .suspend_bias_off = true,
311 .controls = max9850_controls,
312 .num_controls = ARRAY_SIZE(max9850_controls),
313 .dapm_widgets = max9850_dapm_widgets,
314 .num_dapm_widgets = ARRAY_SIZE(max9850_dapm_widgets),
315 .dapm_routes = max9850_dapm_routes,
316 .num_dapm_routes = ARRAY_SIZE(max9850_dapm_routes),
319 static int max9850_i2c_probe(struct i2c_client *i2c,
320 const struct i2c_device_id *id)
322 struct max9850_priv *max9850;
325 max9850 = devm_kzalloc(&i2c->dev, sizeof(struct max9850_priv),
330 max9850->regmap = devm_regmap_init_i2c(i2c, &max9850_regmap);
331 if (IS_ERR(max9850->regmap))
332 return PTR_ERR(max9850->regmap);
334 i2c_set_clientdata(i2c, max9850);
336 ret = snd_soc_register_codec(&i2c->dev,
337 &soc_codec_dev_max9850, &max9850_dai, 1);
341 static int max9850_i2c_remove(struct i2c_client *client)
343 snd_soc_unregister_codec(&client->dev);
347 static const struct i2c_device_id max9850_i2c_id[] = {
351 MODULE_DEVICE_TABLE(i2c, max9850_i2c_id);
353 static struct i2c_driver max9850_i2c_driver = {
356 .owner = THIS_MODULE,
358 .probe = max9850_i2c_probe,
359 .remove = max9850_i2c_remove,
360 .id_table = max9850_i2c_id,
363 module_i2c_driver(max9850_i2c_driver);
365 MODULE_AUTHOR("Christian Glindkamp <christian.glindkamp@taskit.de>");
366 MODULE_DESCRIPTION("ASoC MAX9850 codec driver");
367 MODULE_LICENSE("GPL");