1 // SPDX-License-Identifier: GPL-2.0-only
3 * max98371.c -- ALSA SoC Stereo MAX98371 driver
5 * Copyright 2015-16 Maxim Integrated Products
9 #include <linux/module.h>
10 #include <linux/regmap.h>
11 #include <linux/slab.h>
12 #include <sound/pcm.h>
13 #include <sound/pcm_params.h>
14 #include <sound/soc.h>
15 #include <sound/tlv.h>
18 static const char *const monomix_text[] = {
19 "Left", "Right", "LeftRightDiv2",
22 static const char *const hpf_cutoff_txt[] = {
23 "Disable", "DC Block", "50Hz",
24 "100Hz", "200Hz", "400Hz", "800Hz",
27 static SOC_ENUM_SINGLE_DECL(max98371_monomix, MAX98371_MONOMIX_CFG, 0,
30 static SOC_ENUM_SINGLE_DECL(max98371_hpf_cutoff, MAX98371_HPF, 0,
33 static const DECLARE_TLV_DB_RANGE(max98371_dht_min_gain,
34 0, 1, TLV_DB_SCALE_ITEM(537, 66, 0),
35 2, 3, TLV_DB_SCALE_ITEM(677, 82, 0),
36 4, 5, TLV_DB_SCALE_ITEM(852, 104, 0),
37 6, 7, TLV_DB_SCALE_ITEM(1072, 131, 0),
38 8, 9, TLV_DB_SCALE_ITEM(1350, 165, 0),
39 10, 11, TLV_DB_SCALE_ITEM(1699, 101, 0),
42 static const DECLARE_TLV_DB_RANGE(max98371_dht_max_gain,
43 0, 1, TLV_DB_SCALE_ITEM(537, 66, 0),
44 2, 3, TLV_DB_SCALE_ITEM(677, 82, 0),
45 4, 5, TLV_DB_SCALE_ITEM(852, 104, 0),
46 6, 7, TLV_DB_SCALE_ITEM(1072, 131, 0),
47 8, 9, TLV_DB_SCALE_ITEM(1350, 165, 0),
48 10, 11, TLV_DB_SCALE_ITEM(1699, 208, 0),
51 static const DECLARE_TLV_DB_RANGE(max98371_dht_rot_gain,
52 0, 1, TLV_DB_SCALE_ITEM(-50, -50, 0),
53 2, 6, TLV_DB_SCALE_ITEM(-100, -100, 0),
54 7, 8, TLV_DB_SCALE_ITEM(-800, -200, 0),
55 9, 11, TLV_DB_SCALE_ITEM(-1200, -300, 0),
56 12, 13, TLV_DB_SCALE_ITEM(-2000, -200, 0),
57 14, 15, TLV_DB_SCALE_ITEM(-2500, -500, 0),
60 static const struct reg_default max98371_reg[] = {
129 static bool max98371_volatile_register(struct device *dev, unsigned int reg)
132 case MAX98371_IRQ_CLEAR1:
133 case MAX98371_IRQ_CLEAR2:
134 case MAX98371_IRQ_CLEAR3:
135 case MAX98371_VERSION:
142 static bool max98371_readable_register(struct device *dev, unsigned int reg)
145 case MAX98371_SOFT_RESET:
152 static const DECLARE_TLV_DB_RANGE(max98371_gain_tlv,
153 0, 7, TLV_DB_SCALE_ITEM(0, 50, 0),
154 8, 10, TLV_DB_SCALE_ITEM(400, 100, 0)
157 static const DECLARE_TLV_DB_RANGE(max98371_noload_gain_tlv,
158 0, 11, TLV_DB_SCALE_ITEM(950, 100, 0),
161 static const DECLARE_TLV_DB_SCALE(digital_tlv, -6300, 50, 1);
163 static const struct snd_kcontrol_new max98371_snd_controls[] = {
164 SOC_SINGLE_TLV("Speaker Volume", MAX98371_GAIN,
165 MAX98371_GAIN_SHIFT, (1<<MAX98371_GAIN_WIDTH)-1, 0,
167 SOC_SINGLE_TLV("Digital Volume", MAX98371_DIGITAL_GAIN, 0,
168 (1<<MAX98371_DIGITAL_GAIN_WIDTH)-1, 1, digital_tlv),
169 SOC_SINGLE_TLV("Speaker DHT Max Volume", MAX98371_GAIN,
170 0, (1<<MAX98371_DHT_MAX_WIDTH)-1, 0,
171 max98371_dht_max_gain),
172 SOC_SINGLE_TLV("Speaker DHT Min Volume", MAX98371_DHT_GAIN,
173 0, (1<<MAX98371_DHT_GAIN_WIDTH)-1, 0,
174 max98371_dht_min_gain),
175 SOC_SINGLE_TLV("Speaker DHT Rotation Volume", MAX98371_DHT_GAIN,
176 0, (1<<MAX98371_DHT_ROT_WIDTH)-1, 0,
177 max98371_dht_rot_gain),
178 SOC_SINGLE("DHT Attack Step", MAX98371_DHT, MAX98371_DHT_STEP, 3, 0),
179 SOC_SINGLE("DHT Attack Rate", MAX98371_DHT, 0, 7, 0),
180 SOC_ENUM("Monomix Select", max98371_monomix),
181 SOC_ENUM("HPF Cutoff", max98371_hpf_cutoff),
184 static int max98371_dai_set_fmt(struct snd_soc_dai *codec_dai,
187 struct snd_soc_component *component = codec_dai->component;
188 struct max98371_priv *max98371 = snd_soc_component_get_drvdata(component);
189 unsigned int val = 0;
191 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
192 case SND_SOC_DAIFMT_CBS_CFS:
195 dev_err(component->dev, "DAI clock mode unsupported");
199 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
200 case SND_SOC_DAIFMT_I2S:
203 case SND_SOC_DAIFMT_RIGHT_J:
204 val |= MAX98371_DAI_RIGHT;
206 case SND_SOC_DAIFMT_LEFT_J:
207 val |= MAX98371_DAI_LEFT;
210 dev_err(component->dev, "DAI wrong mode unsupported");
213 regmap_update_bits(max98371->regmap, MAX98371_FMT,
214 MAX98371_FMT_MODE_MASK, val);
218 static int max98371_dai_hw_params(struct snd_pcm_substream *substream,
219 struct snd_pcm_hw_params *params,
220 struct snd_soc_dai *dai)
222 struct snd_soc_component *component = dai->component;
223 struct max98371_priv *max98371 = snd_soc_component_get_drvdata(component);
224 int blr_clk_ratio, ch_size, channels = params_channels(params);
225 int rate = params_rate(params);
227 switch (params_format(params)) {
228 case SNDRV_PCM_FORMAT_S8:
229 regmap_update_bits(max98371->regmap, MAX98371_FMT,
230 MAX98371_FMT_MASK, MAX98371_DAI_CHANSZ_16);
233 case SNDRV_PCM_FORMAT_S16_LE:
234 regmap_update_bits(max98371->regmap, MAX98371_FMT,
235 MAX98371_FMT_MASK, MAX98371_DAI_CHANSZ_16);
238 case SNDRV_PCM_FORMAT_S24_LE:
239 regmap_update_bits(max98371->regmap, MAX98371_FMT,
240 MAX98371_FMT_MASK, MAX98371_DAI_CHANSZ_32);
243 case SNDRV_PCM_FORMAT_S32_LE:
244 regmap_update_bits(max98371->regmap, MAX98371_FMT,
245 MAX98371_FMT_MASK, MAX98371_DAI_CHANSZ_32);
252 /* BCLK/LRCLK ratio calculation */
253 blr_clk_ratio = channels * ch_size;
254 switch (blr_clk_ratio) {
256 regmap_update_bits(max98371->regmap,
258 MAX98371_DAI_BSEL_MASK, MAX98371_DAI_BSEL_32);
261 regmap_update_bits(max98371->regmap,
263 MAX98371_DAI_BSEL_MASK, MAX98371_DAI_BSEL_48);
266 regmap_update_bits(max98371->regmap,
268 MAX98371_DAI_BSEL_MASK, MAX98371_DAI_BSEL_64);
276 regmap_update_bits(max98371->regmap,
278 MAX98371_SPK_SR_MASK, MAX98371_SPK_SR_32);
281 regmap_update_bits(max98371->regmap,
283 MAX98371_SPK_SR_MASK, MAX98371_SPK_SR_44);
286 regmap_update_bits(max98371->regmap,
288 MAX98371_SPK_SR_MASK, MAX98371_SPK_SR_48);
291 regmap_update_bits(max98371->regmap,
293 MAX98371_SPK_SR_MASK, MAX98371_SPK_SR_88);
296 regmap_update_bits(max98371->regmap,
298 MAX98371_SPK_SR_MASK, MAX98371_SPK_SR_96);
304 /* enabling both the RX channels*/
305 regmap_update_bits(max98371->regmap, MAX98371_MONOMIX_SRC,
306 MAX98371_MONOMIX_SRC_MASK, MONOMIX_RX_0_1);
307 regmap_update_bits(max98371->regmap, MAX98371_DAI_CHANNEL,
308 MAX98371_CHANNEL_MASK, MAX98371_CHANNEL_MASK);
312 static const struct snd_soc_dapm_widget max98371_dapm_widgets[] = {
313 SND_SOC_DAPM_DAC("DAC", NULL, MAX98371_SPK_ENABLE, 0, 0),
314 SND_SOC_DAPM_SUPPLY("Global Enable", MAX98371_GLOBAL_ENABLE,
316 SND_SOC_DAPM_OUTPUT("SPK_OUT"),
319 static const struct snd_soc_dapm_route max98371_audio_map[] = {
320 {"DAC", NULL, "HiFi Playback"},
321 {"SPK_OUT", NULL, "DAC"},
322 {"SPK_OUT", NULL, "Global Enable"},
325 #define MAX98371_RATES SNDRV_PCM_RATE_8000_48000
326 #define MAX98371_FORMATS (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_BE | \
327 SNDRV_PCM_FMTBIT_S24_BE | SNDRV_PCM_FMTBIT_S32_BE)
329 static const struct snd_soc_dai_ops max98371_dai_ops = {
330 .set_fmt = max98371_dai_set_fmt,
331 .hw_params = max98371_dai_hw_params,
334 static struct snd_soc_dai_driver max98371_dai[] = {
336 .name = "max98371-aif1",
338 .stream_name = "HiFi Playback",
341 .rates = SNDRV_PCM_RATE_8000_48000,
342 .formats = MAX98371_FORMATS,
344 .ops = &max98371_dai_ops,
348 static const struct snd_soc_component_driver max98371_component = {
349 .controls = max98371_snd_controls,
350 .num_controls = ARRAY_SIZE(max98371_snd_controls),
351 .dapm_routes = max98371_audio_map,
352 .num_dapm_routes = ARRAY_SIZE(max98371_audio_map),
353 .dapm_widgets = max98371_dapm_widgets,
354 .num_dapm_widgets = ARRAY_SIZE(max98371_dapm_widgets),
356 .use_pmdown_time = 1,
358 .non_legacy_dai_naming = 1,
361 static const struct regmap_config max98371_regmap = {
364 .max_register = MAX98371_VERSION,
365 .reg_defaults = max98371_reg,
366 .num_reg_defaults = ARRAY_SIZE(max98371_reg),
367 .volatile_reg = max98371_volatile_register,
368 .readable_reg = max98371_readable_register,
369 .cache_type = REGCACHE_RBTREE,
372 static int max98371_i2c_probe(struct i2c_client *i2c,
373 const struct i2c_device_id *id)
375 struct max98371_priv *max98371;
378 max98371 = devm_kzalloc(&i2c->dev,
379 sizeof(*max98371), GFP_KERNEL);
383 i2c_set_clientdata(i2c, max98371);
384 max98371->regmap = devm_regmap_init_i2c(i2c, &max98371_regmap);
385 if (IS_ERR(max98371->regmap)) {
386 ret = PTR_ERR(max98371->regmap);
388 "Failed to allocate regmap: %d\n", ret);
392 ret = regmap_read(max98371->regmap, MAX98371_VERSION, ®);
394 dev_info(&i2c->dev, "device error %d\n", ret);
397 dev_info(&i2c->dev, "device version %x\n", reg);
399 ret = devm_snd_soc_register_component(&i2c->dev, &max98371_component,
400 max98371_dai, ARRAY_SIZE(max98371_dai));
402 dev_err(&i2c->dev, "Failed to register component: %d\n", ret);
408 static const struct i2c_device_id max98371_i2c_id[] = {
413 MODULE_DEVICE_TABLE(i2c, max98371_i2c_id);
415 static const struct of_device_id max98371_of_match[] = {
416 { .compatible = "maxim,max98371", },
419 MODULE_DEVICE_TABLE(of, max98371_of_match);
421 static struct i2c_driver max98371_i2c_driver = {
425 .of_match_table = of_match_ptr(max98371_of_match),
427 .probe = max98371_i2c_probe,
428 .id_table = max98371_i2c_id,
431 module_i2c_driver(max98371_i2c_driver);
433 MODULE_AUTHOR("anish kumar <yesanishhere@gmail.com>");
434 MODULE_DESCRIPTION("ALSA SoC MAX98371 driver");
435 MODULE_LICENSE("GPL");