1 // SPDX-License-Identifier: GPL-2.0-only
3 * MAX98504 ALSA SoC Audio driver
5 * Copyright 2013 - 2014 Maxim Integrated Products
6 * Copyright 2016 Samsung Electronics Co., Ltd.
9 #include <linux/delay.h>
10 #include <linux/i2c.h>
11 #include <linux/module.h>
12 #include <linux/regulator/consumer.h>
13 #include <linux/slab.h>
14 #include <linux/types.h>
15 #include <sound/soc.h>
19 static const char * const max98504_supply_names[] = {
24 #define MAX98504_NUM_SUPPLIES ARRAY_SIZE(max98504_supply_names)
26 struct max98504_priv {
27 struct regmap *regmap;
28 struct regulator_bulk_data supplies[MAX98504_NUM_SUPPLIES];
29 unsigned int pcm_rx_channels;
31 unsigned int brownout_threshold;
32 unsigned int brownout_attenuation;
33 unsigned int brownout_attack_hold;
34 unsigned int brownout_timed_hold;
35 unsigned int brownout_release_rate;
38 static struct reg_default max98504_reg_defaults[] = {
77 static bool max98504_volatile_register(struct device *dev, unsigned int reg)
80 case MAX98504_INTERRUPT_STATUS:
81 case MAX98504_INTERRUPT_FLAGS:
82 case MAX98504_INTERRUPT_FLAG_CLEARS:
83 case MAX98504_WATCHDOG_CLEAR:
84 case MAX98504_GLOBAL_ENABLE:
85 case MAX98504_SOFTWARE_RESET:
92 static bool max98504_readable_register(struct device *dev, unsigned int reg)
95 case MAX98504_SOFTWARE_RESET:
96 case MAX98504_WATCHDOG_CLEAR:
97 case MAX98504_INTERRUPT_FLAG_CLEARS:
104 static int max98504_pcm_rx_ev(struct snd_soc_dapm_widget *w,
105 struct snd_kcontrol *kcontrol, int event)
107 struct snd_soc_component *c = snd_soc_dapm_to_component(w->dapm);
108 struct max98504_priv *max98504 = snd_soc_component_get_drvdata(c);
111 case SND_SOC_DAPM_PRE_PMU:
112 regmap_write(max98504->regmap, MAX98504_PCM_RX_ENABLE,
113 max98504->pcm_rx_channels);
115 case SND_SOC_DAPM_POST_PMD:
116 regmap_write(max98504->regmap, MAX98504_PCM_RX_ENABLE, 0);
123 static int max98504_component_probe(struct snd_soc_component *c)
125 struct max98504_priv *max98504 = snd_soc_component_get_drvdata(c);
126 struct regmap *map = max98504->regmap;
129 ret = regulator_bulk_enable(MAX98504_NUM_SUPPLIES, max98504->supplies);
133 regmap_write(map, MAX98504_SOFTWARE_RESET, 0x1);
136 if (!max98504->brownout_enable)
139 regmap_write(map, MAX98504_PVDD_BROWNOUT_ENABLE, 0x1);
141 regmap_write(map, MAX98504_PVDD_BROWNOUT_CONFIG_1,
142 (max98504->brownout_threshold & 0x1f) << 3 |
143 (max98504->brownout_attenuation & 0x3));
145 regmap_write(map, MAX98504_PVDD_BROWNOUT_CONFIG_2,
146 max98504->brownout_attack_hold & 0xff);
148 regmap_write(map, MAX98504_PVDD_BROWNOUT_CONFIG_3,
149 max98504->brownout_timed_hold & 0xff);
151 regmap_write(map, MAX98504_PVDD_BROWNOUT_CONFIG_4,
152 max98504->brownout_release_rate & 0xff);
157 static void max98504_component_remove(struct snd_soc_component *c)
159 struct max98504_priv *max98504 = snd_soc_component_get_drvdata(c);
161 regulator_bulk_disable(MAX98504_NUM_SUPPLIES, max98504->supplies);
164 static const char *spk_source_mux_text[] = {
165 "PCM Monomix", "Analog In", "PDM Left", "PDM Right"
168 static const struct soc_enum spk_source_mux_enum =
169 SOC_ENUM_SINGLE(MAX98504_SPEAKER_SOURCE_SELECT,
170 0, ARRAY_SIZE(spk_source_mux_text),
171 spk_source_mux_text);
173 static const struct snd_kcontrol_new spk_source_mux =
174 SOC_DAPM_ENUM("SPK Source", spk_source_mux_enum);
176 static const struct snd_soc_dapm_route max98504_dapm_routes[] = {
177 { "SPKOUT", NULL, "Global Enable" },
178 { "SPK Source", "PCM Monomix", "DAC PCM" },
179 { "SPK Source", "Analog In", "AIN" },
180 { "SPK Source", "PDM Left", "DAC PDM" },
181 { "SPK Source", "PDM Right", "DAC PDM" },
184 static const struct snd_soc_dapm_widget max98504_dapm_widgets[] = {
185 SND_SOC_DAPM_SUPPLY("Global Enable", MAX98504_GLOBAL_ENABLE,
187 SND_SOC_DAPM_INPUT("AIN"),
188 SND_SOC_DAPM_AIF_OUT("AIF2OUTL", "AIF2 Capture", 0, SND_SOC_NOPM, 0, 0),
189 SND_SOC_DAPM_AIF_OUT("AIF2OUTR", "AIF2 Capture", 1, SND_SOC_NOPM, 0, 0),
190 SND_SOC_DAPM_DAC_E("DAC PCM", NULL, SND_SOC_NOPM, 0, 0,
192 SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
193 SND_SOC_DAPM_DAC("DAC PDM", NULL, MAX98504_PDM_RX_ENABLE, 0, 0),
194 SND_SOC_DAPM_MUX("SPK Source", SND_SOC_NOPM, 0, 0, &spk_source_mux),
195 SND_SOC_DAPM_REG(snd_soc_dapm_spk, "SPKOUT",
196 MAX98504_SPEAKER_ENABLE, 0, 1, 1, 0),
199 static int max98504_set_tdm_slot(struct snd_soc_dai *dai,
200 unsigned int tx_mask, unsigned int rx_mask,
201 int slots, int slot_width)
203 struct max98504_priv *max98504 = snd_soc_dai_get_drvdata(dai);
204 struct regmap *map = max98504->regmap;
208 case MAX98504_DAI_ID_PCM:
209 regmap_write(map, MAX98504_PCM_TX_ENABLE, tx_mask);
210 max98504->pcm_rx_channels = rx_mask;
213 case MAX98504_DAI_ID_PDM:
214 regmap_write(map, MAX98504_PDM_TX_ENABLE, tx_mask);
222 static int max98504_set_channel_map(struct snd_soc_dai *dai,
223 unsigned int tx_num, unsigned int *tx_slot,
224 unsigned int rx_num, unsigned int *rx_slot)
226 struct max98504_priv *max98504 = snd_soc_dai_get_drvdata(dai);
227 struct regmap *map = max98504->regmap;
228 unsigned int i, sources = 0;
230 for (i = 0; i < tx_num; i++)
235 case MAX98504_DAI_ID_PCM:
236 regmap_write(map, MAX98504_PCM_TX_CHANNEL_SOURCES,
240 case MAX98504_DAI_ID_PDM:
241 regmap_write(map, MAX98504_PDM_TX_CONTROL, sources);
247 regmap_write(map, MAX98504_MEASUREMENT_ENABLE, sources ? 0x3 : 0x01);
252 static const struct snd_soc_dai_ops max98504_dai_ops = {
253 .set_tdm_slot = max98504_set_tdm_slot,
254 .set_channel_map = max98504_set_channel_map,
257 #define MAX98504_FORMATS (SNDRV_PCM_FMTBIT_S8|SNDRV_PCM_FMTBIT_S16_LE|\
258 SNDRV_PCM_FMTBIT_S24_LE|SNDRV_PCM_FMTBIT_S32_LE)
259 #define MAX98504_PDM_RATES (SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_16000|\
260 SNDRV_PCM_RATE_32000|SNDRV_PCM_RATE_44100|\
261 SNDRV_PCM_RATE_48000|SNDRV_PCM_RATE_88200|\
262 SNDRV_PCM_RATE_96000)
264 static struct snd_soc_dai_driver max98504_dai[] = {
265 /* TODO: Add the PCM interface definitions */
267 .name = "max98504-aif2",
268 .id = MAX98504_DAI_ID_PDM,
270 .stream_name = "AIF2 Playback",
273 .rates = MAX98504_PDM_RATES,
274 .formats = MAX98504_FORMATS,
277 .stream_name = "AIF2 Capture",
280 .rates = MAX98504_PDM_RATES,
281 .formats = MAX98504_FORMATS,
283 .ops = &max98504_dai_ops,
287 static const struct snd_soc_component_driver max98504_component_driver = {
288 .probe = max98504_component_probe,
289 .remove = max98504_component_remove,
290 .dapm_widgets = max98504_dapm_widgets,
291 .num_dapm_widgets = ARRAY_SIZE(max98504_dapm_widgets),
292 .dapm_routes = max98504_dapm_routes,
293 .num_dapm_routes = ARRAY_SIZE(max98504_dapm_routes),
296 static const struct regmap_config max98504_regmap = {
299 .max_register = MAX98504_MAX_REGISTER,
300 .reg_defaults = max98504_reg_defaults,
301 .num_reg_defaults = ARRAY_SIZE(max98504_reg_defaults),
302 .volatile_reg = max98504_volatile_register,
303 .readable_reg = max98504_readable_register,
304 .cache_type = REGCACHE_RBTREE,
307 static int max98504_i2c_probe(struct i2c_client *client,
308 const struct i2c_device_id *id)
310 struct device *dev = &client->dev;
311 struct device_node *node = dev->of_node;
312 struct max98504_priv *max98504;
315 max98504 = devm_kzalloc(dev, sizeof(*max98504), GFP_KERNEL);
320 if (!of_property_read_u32(node, "maxim,brownout-threshold",
321 &max98504->brownout_threshold))
322 max98504->brownout_enable = true;
324 of_property_read_u32(node, "maxim,brownout-attenuation",
325 &max98504->brownout_attenuation);
326 of_property_read_u32(node, "maxim,brownout-attack-hold-ms",
327 &max98504->brownout_attack_hold);
328 of_property_read_u32(node, "maxim,brownout-timed-hold-ms",
329 &max98504->brownout_timed_hold);
330 of_property_read_u32(node, "maxim,brownout-release-rate-ms",
331 &max98504->brownout_release_rate);
334 max98504->regmap = devm_regmap_init_i2c(client, &max98504_regmap);
335 if (IS_ERR(max98504->regmap)) {
336 ret = PTR_ERR(max98504->regmap);
337 dev_err(&client->dev, "regmap initialization failed: %d\n", ret);
341 for (i = 0; i < MAX98504_NUM_SUPPLIES; i++)
342 max98504->supplies[i].supply = max98504_supply_names[i];
344 ret = devm_regulator_bulk_get(dev, MAX98504_NUM_SUPPLIES,
349 i2c_set_clientdata(client, max98504);
351 return devm_snd_soc_register_component(dev, &max98504_component_driver,
352 max98504_dai, ARRAY_SIZE(max98504_dai));
356 static const struct of_device_id max98504_of_match[] = {
357 { .compatible = "maxim,max98504" },
360 MODULE_DEVICE_TABLE(of, max98504_of_match);
363 static const struct i2c_device_id max98504_i2c_id[] = {
367 MODULE_DEVICE_TABLE(i2c, max98504_i2c_id);
369 static struct i2c_driver max98504_i2c_driver = {
372 .of_match_table = of_match_ptr(max98504_of_match),
374 .probe = max98504_i2c_probe,
375 .id_table = max98504_i2c_id,
377 module_i2c_driver(max98504_i2c_driver);
379 MODULE_DESCRIPTION("ASoC MAX98504 driver");
380 MODULE_LICENSE("GPL");