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d2912cb1 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
4c5d1469 SN |
2 | /* |
3 | * MAX98504 ALSA SoC Audio driver | |
4 | * | |
5 | * Copyright 2013 - 2014 Maxim Integrated Products | |
6 | * Copyright 2016 Samsung Electronics Co., Ltd. | |
4c5d1469 SN |
7 | */ |
8 | ||
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> | |
16 | ||
17 | #include "max98504.h" | |
18 | ||
19 | static const char * const max98504_supply_names[] = { | |
20 | "DVDD", | |
21 | "DIOVDD", | |
22 | "PVDD", | |
23 | }; | |
24 | #define MAX98504_NUM_SUPPLIES ARRAY_SIZE(max98504_supply_names) | |
25 | ||
26 | struct max98504_priv { | |
27 | struct regmap *regmap; | |
28 | struct regulator_bulk_data supplies[MAX98504_NUM_SUPPLIES]; | |
29 | unsigned int pcm_rx_channels; | |
30 | bool brownout_enable; | |
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; | |
36 | }; | |
37 | ||
38 | static struct reg_default max98504_reg_defaults[] = { | |
39 | { 0x01, 0}, | |
40 | { 0x02, 0}, | |
41 | { 0x03, 0}, | |
42 | { 0x04, 0}, | |
43 | { 0x10, 0}, | |
44 | { 0x11, 0}, | |
45 | { 0x12, 0}, | |
46 | { 0x13, 0}, | |
47 | { 0x14, 0}, | |
48 | { 0x15, 0}, | |
49 | { 0x16, 0}, | |
50 | { 0x17, 0}, | |
51 | { 0x18, 0}, | |
52 | { 0x19, 0}, | |
53 | { 0x1A, 0}, | |
54 | { 0x20, 0}, | |
55 | { 0x21, 0}, | |
56 | { 0x22, 0}, | |
57 | { 0x23, 0}, | |
58 | { 0x24, 0}, | |
59 | { 0x25, 0}, | |
60 | { 0x26, 0}, | |
61 | { 0x27, 0}, | |
62 | { 0x28, 0}, | |
63 | { 0x30, 0}, | |
64 | { 0x31, 0}, | |
65 | { 0x32, 0}, | |
66 | { 0x33, 0}, | |
67 | { 0x34, 0}, | |
68 | { 0x35, 0}, | |
69 | { 0x36, 0}, | |
70 | { 0x37, 0}, | |
71 | { 0x38, 0}, | |
72 | { 0x39, 0}, | |
73 | { 0x40, 0}, | |
74 | { 0x41, 0}, | |
75 | }; | |
76 | ||
77 | static bool max98504_volatile_register(struct device *dev, unsigned int reg) | |
78 | { | |
79 | switch (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: | |
86 | return true; | |
87 | default: | |
88 | return false; | |
89 | } | |
90 | } | |
91 | ||
92 | static bool max98504_readable_register(struct device *dev, unsigned int reg) | |
93 | { | |
94 | switch (reg) { | |
95 | case MAX98504_SOFTWARE_RESET: | |
96 | case MAX98504_WATCHDOG_CLEAR: | |
97 | case MAX98504_INTERRUPT_FLAG_CLEARS: | |
98 | return false; | |
99 | default: | |
100 | return true; | |
101 | } | |
102 | } | |
103 | ||
104 | static int max98504_pcm_rx_ev(struct snd_soc_dapm_widget *w, | |
105 | struct snd_kcontrol *kcontrol, int event) | |
106 | { | |
107 | struct snd_soc_component *c = snd_soc_dapm_to_component(w->dapm); | |
108 | struct max98504_priv *max98504 = snd_soc_component_get_drvdata(c); | |
109 | ||
110 | switch (event) { | |
111 | case SND_SOC_DAPM_PRE_PMU: | |
112 | regmap_write(max98504->regmap, MAX98504_PCM_RX_ENABLE, | |
113 | max98504->pcm_rx_channels); | |
114 | break; | |
115 | case SND_SOC_DAPM_POST_PMD: | |
116 | regmap_write(max98504->regmap, MAX98504_PCM_RX_ENABLE, 0); | |
117 | break; | |
118 | } | |
119 | ||
120 | return 0; | |
121 | } | |
122 | ||
123 | static int max98504_component_probe(struct snd_soc_component *c) | |
124 | { | |
125 | struct max98504_priv *max98504 = snd_soc_component_get_drvdata(c); | |
126 | struct regmap *map = max98504->regmap; | |
127 | int ret; | |
128 | ||
129 | ret = regulator_bulk_enable(MAX98504_NUM_SUPPLIES, max98504->supplies); | |
130 | if (ret < 0) | |
131 | return ret; | |
132 | ||
133 | regmap_write(map, MAX98504_SOFTWARE_RESET, 0x1); | |
134 | msleep(20); | |
135 | ||
136 | if (!max98504->brownout_enable) | |
137 | return 0; | |
138 | ||
139 | regmap_write(map, MAX98504_PVDD_BROWNOUT_ENABLE, 0x1); | |
140 | ||
141 | regmap_write(map, MAX98504_PVDD_BROWNOUT_CONFIG_1, | |
142 | (max98504->brownout_threshold & 0x1f) << 3 | | |
143 | (max98504->brownout_attenuation & 0x3)); | |
144 | ||
145 | regmap_write(map, MAX98504_PVDD_BROWNOUT_CONFIG_2, | |
146 | max98504->brownout_attack_hold & 0xff); | |
147 | ||
148 | regmap_write(map, MAX98504_PVDD_BROWNOUT_CONFIG_3, | |
149 | max98504->brownout_timed_hold & 0xff); | |
150 | ||
151 | regmap_write(map, MAX98504_PVDD_BROWNOUT_CONFIG_4, | |
152 | max98504->brownout_release_rate & 0xff); | |
153 | ||
154 | return 0; | |
155 | } | |
156 | ||
157 | static void max98504_component_remove(struct snd_soc_component *c) | |
158 | { | |
159 | struct max98504_priv *max98504 = snd_soc_component_get_drvdata(c); | |
160 | ||
161 | regulator_bulk_disable(MAX98504_NUM_SUPPLIES, max98504->supplies); | |
162 | } | |
163 | ||
164 | static const char *spk_source_mux_text[] = { | |
165 | "PCM Monomix", "Analog In", "PDM Left", "PDM Right" | |
166 | }; | |
167 | ||
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); | |
172 | ||
173 | static const struct snd_kcontrol_new spk_source_mux = | |
174 | SOC_DAPM_ENUM("SPK Source", spk_source_mux_enum); | |
175 | ||
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" }, | |
182 | }; | |
183 | ||
184 | static const struct snd_soc_dapm_widget max98504_dapm_widgets[] = { | |
185 | SND_SOC_DAPM_SUPPLY("Global Enable", MAX98504_GLOBAL_ENABLE, | |
186 | 0, 0, NULL, 0), | |
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, | |
191 | max98504_pcm_rx_ev, | |
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), | |
197 | }; | |
198 | ||
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) | |
202 | { | |
203 | struct max98504_priv *max98504 = snd_soc_dai_get_drvdata(dai); | |
204 | struct regmap *map = max98504->regmap; | |
205 | ||
206 | ||
207 | switch (dai->id) { | |
208 | case MAX98504_DAI_ID_PCM: | |
209 | regmap_write(map, MAX98504_PCM_TX_ENABLE, tx_mask); | |
210 | max98504->pcm_rx_channels = rx_mask; | |
211 | break; | |
212 | ||
213 | case MAX98504_DAI_ID_PDM: | |
214 | regmap_write(map, MAX98504_PDM_TX_ENABLE, tx_mask); | |
215 | break; | |
216 | default: | |
217 | WARN_ON(1); | |
218 | } | |
219 | ||
220 | return 0; | |
221 | } | |
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) | |
225 | { | |
226 | struct max98504_priv *max98504 = snd_soc_dai_get_drvdata(dai); | |
227 | struct regmap *map = max98504->regmap; | |
228 | unsigned int i, sources = 0; | |
229 | ||
230 | for (i = 0; i < tx_num; i++) | |
231 | if (tx_slot[i]) | |
232 | sources |= (1 << i); | |
233 | ||
234 | switch (dai->id) { | |
235 | case MAX98504_DAI_ID_PCM: | |
236 | regmap_write(map, MAX98504_PCM_TX_CHANNEL_SOURCES, | |
237 | sources); | |
238 | break; | |
239 | ||
240 | case MAX98504_DAI_ID_PDM: | |
241 | regmap_write(map, MAX98504_PDM_TX_CONTROL, sources); | |
242 | break; | |
243 | default: | |
244 | WARN_ON(1); | |
245 | } | |
246 | ||
247 | regmap_write(map, MAX98504_MEASUREMENT_ENABLE, sources ? 0x3 : 0x01); | |
248 | ||
249 | return 0; | |
250 | } | |
251 | ||
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, | |
255 | }; | |
256 | ||
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) | |
263 | ||
264 | static struct snd_soc_dai_driver max98504_dai[] = { | |
265 | /* TODO: Add the PCM interface definitions */ | |
266 | { | |
267 | .name = "max98504-aif2", | |
268 | .id = MAX98504_DAI_ID_PDM, | |
269 | .playback = { | |
270 | .stream_name = "AIF2 Playback", | |
271 | .channels_min = 1, | |
272 | .channels_max = 2, | |
273 | .rates = MAX98504_PDM_RATES, | |
274 | .formats = MAX98504_FORMATS, | |
275 | }, | |
276 | .capture = { | |
277 | .stream_name = "AIF2 Capture", | |
278 | .channels_min = 1, | |
279 | .channels_max = 2, | |
280 | .rates = MAX98504_PDM_RATES, | |
281 | .formats = MAX98504_FORMATS, | |
282 | }, | |
283 | .ops = &max98504_dai_ops, | |
284 | }, | |
285 | }; | |
286 | ||
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), | |
294 | }; | |
295 | ||
296 | static const struct regmap_config max98504_regmap = { | |
297 | .reg_bits = 16, | |
298 | .val_bits = 8, | |
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, | |
305 | }; | |
306 | ||
307 | static int max98504_i2c_probe(struct i2c_client *client, | |
308 | const struct i2c_device_id *id) | |
309 | { | |
310 | struct device *dev = &client->dev; | |
311 | struct device_node *node = dev->of_node; | |
312 | struct max98504_priv *max98504; | |
313 | int i, ret; | |
314 | ||
315 | max98504 = devm_kzalloc(dev, sizeof(*max98504), GFP_KERNEL); | |
316 | if (!max98504) | |
317 | return -ENOMEM; | |
318 | ||
319 | if (node) { | |
320 | if (!of_property_read_u32(node, "maxim,brownout-threshold", | |
321 | &max98504->brownout_threshold)) | |
322 | max98504->brownout_enable = true; | |
323 | ||
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); | |
332 | } | |
333 | ||
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); | |
338 | return ret; | |
339 | } | |
340 | ||
341 | for (i = 0; i < MAX98504_NUM_SUPPLIES; i++) | |
342 | max98504->supplies[i].supply = max98504_supply_names[i]; | |
343 | ||
344 | ret = devm_regulator_bulk_get(dev, MAX98504_NUM_SUPPLIES, | |
345 | max98504->supplies); | |
346 | if (ret < 0) | |
347 | return ret; | |
348 | ||
349 | i2c_set_clientdata(client, max98504); | |
350 | ||
351 | return devm_snd_soc_register_component(dev, &max98504_component_driver, | |
352 | max98504_dai, ARRAY_SIZE(max98504_dai)); | |
353 | } | |
354 | ||
355 | #ifdef CONFIG_OF | |
356 | static const struct of_device_id max98504_of_match[] = { | |
357 | { .compatible = "maxim,max98504" }, | |
358 | { }, | |
359 | }; | |
360 | MODULE_DEVICE_TABLE(of, max98504_of_match); | |
361 | #endif | |
362 | ||
363 | static const struct i2c_device_id max98504_i2c_id[] = { | |
364 | { "max98504" }, | |
365 | { } | |
366 | }; | |
367 | MODULE_DEVICE_TABLE(i2c, max98504_i2c_id); | |
368 | ||
369 | static struct i2c_driver max98504_i2c_driver = { | |
370 | .driver = { | |
371 | .name = "max98504", | |
372 | .of_match_table = of_match_ptr(max98504_of_match), | |
373 | }, | |
374 | .probe = max98504_i2c_probe, | |
375 | .id_table = max98504_i2c_id, | |
376 | }; | |
377 | module_i2c_driver(max98504_i2c_driver); | |
378 | ||
379 | MODULE_DESCRIPTION("ASoC MAX98504 driver"); | |
380 | MODULE_LICENSE("GPL"); |