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1 | /* |
2 | * max98371.c -- ALSA SoC Stereo MAX98371 driver |
3 | * |
4 | * Copyright 2015-16 Maxim Integrated Products |
5 | * |
6 | * This program is free software; you can redistribute it and/or modify |
7 | * it under the terms of the GNU General Public License version 2 as |
8 | * published by the Free Software Foundation. |
9 | */ |
10 | |
11 | #include <linux/i2c.h> |
12 | #include <linux/module.h> |
13 | #include <linux/regmap.h> |
14 | #include <linux/slab.h> |
15 | #include <sound/pcm.h> |
16 | #include <sound/pcm_params.h> |
17 | #include <sound/soc.h> |
18 | #include <sound/tlv.h> |
19 | #include "max98371.h" |
20 | |
21 | static const char *const monomix_text[] = { |
22 | "Left", "Right", "LeftRightDiv2", |
23 | }; |
24 | |
25 | static const char *const hpf_cutoff_txt[] = { |
26 | "Disable", "DC Block", "50Hz", |
27 | "100Hz", "200Hz", "400Hz", "800Hz", |
28 | }; |
29 | |
30 | static SOC_ENUM_SINGLE_DECL(max98371_monomix, MAX98371_MONOMIX_CFG, 0, |
31 | monomix_text); |
32 | |
33 | static SOC_ENUM_SINGLE_DECL(max98371_hpf_cutoff, MAX98371_HPF, 0, |
34 | hpf_cutoff_txt); |
35 | |
36 | static const DECLARE_TLV_DB_RANGE(max98371_dht_min_gain, |
37 | 0, 1, TLV_DB_SCALE_ITEM(537, 66, 0), |
38 | 2, 3, TLV_DB_SCALE_ITEM(677, 82, 0), |
39 | 4, 5, TLV_DB_SCALE_ITEM(852, 104, 0), |
40 | 6, 7, TLV_DB_SCALE_ITEM(1072, 131, 0), |
41 | 8, 9, TLV_DB_SCALE_ITEM(1350, 165, 0), |
42 | 10, 11, TLV_DB_SCALE_ITEM(1699, 101, 0), |
43 | ); |
44 | |
45 | static const DECLARE_TLV_DB_RANGE(max98371_dht_max_gain, |
46 | 0, 1, TLV_DB_SCALE_ITEM(537, 66, 0), |
47 | 2, 3, TLV_DB_SCALE_ITEM(677, 82, 0), |
48 | 4, 5, TLV_DB_SCALE_ITEM(852, 104, 0), |
49 | 6, 7, TLV_DB_SCALE_ITEM(1072, 131, 0), |
50 | 8, 9, TLV_DB_SCALE_ITEM(1350, 165, 0), |
51 | 10, 11, TLV_DB_SCALE_ITEM(1699, 208, 0), |
52 | ); |
53 | |
54 | static const DECLARE_TLV_DB_RANGE(max98371_dht_rot_gain, |
55 | 0, 1, TLV_DB_SCALE_ITEM(-50, -50, 0), |
56 | 2, 6, TLV_DB_SCALE_ITEM(-100, -100, 0), |
57 | 7, 8, TLV_DB_SCALE_ITEM(-800, -200, 0), |
58 | 9, 11, TLV_DB_SCALE_ITEM(-1200, -300, 0), |
59 | 12, 13, TLV_DB_SCALE_ITEM(-2000, -200, 0), |
60 | 14, 15, TLV_DB_SCALE_ITEM(-2500, -500, 0), |
61 | ); |
62 | |
63 | static const struct reg_default max98371_reg[] = { |
64 | { 0x01, 0x00 }, |
65 | { 0x02, 0x00 }, |
66 | { 0x03, 0x00 }, |
67 | { 0x04, 0x00 }, |
68 | { 0x05, 0x00 }, |
69 | { 0x06, 0x00 }, |
70 | { 0x07, 0x00 }, |
71 | { 0x08, 0x00 }, |
72 | { 0x09, 0x00 }, |
73 | { 0x0A, 0x00 }, |
74 | { 0x10, 0x06 }, |
75 | { 0x11, 0x08 }, |
76 | { 0x14, 0x80 }, |
77 | { 0x15, 0x00 }, |
78 | { 0x16, 0x00 }, |
79 | { 0x18, 0x00 }, |
80 | { 0x19, 0x00 }, |
81 | { 0x1C, 0x00 }, |
82 | { 0x1D, 0x00 }, |
83 | { 0x1E, 0x00 }, |
84 | { 0x1F, 0x00 }, |
85 | { 0x20, 0x00 }, |
86 | { 0x21, 0x00 }, |
87 | { 0x22, 0x00 }, |
88 | { 0x23, 0x00 }, |
89 | { 0x24, 0x00 }, |
90 | { 0x25, 0x00 }, |
91 | { 0x26, 0x00 }, |
92 | { 0x27, 0x00 }, |
93 | { 0x28, 0x00 }, |
94 | { 0x29, 0x00 }, |
95 | { 0x2A, 0x00 }, |
96 | { 0x2B, 0x00 }, |
97 | { 0x2C, 0x00 }, |
98 | { 0x2D, 0x00 }, |
99 | { 0x2E, 0x0B }, |
100 | { 0x31, 0x00 }, |
101 | { 0x32, 0x18 }, |
102 | { 0x33, 0x00 }, |
103 | { 0x34, 0x00 }, |
104 | { 0x36, 0x00 }, |
105 | { 0x37, 0x00 }, |
106 | { 0x38, 0x00 }, |
107 | { 0x39, 0x00 }, |
108 | { 0x3A, 0x00 }, |
109 | { 0x3B, 0x00 }, |
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110 | { 0x3C, 0x00 }, |
111 | { 0x3D, 0x00 }, |
112 | { 0x3E, 0x00 }, |
113 | { 0x3F, 0x00 }, |
114 | { 0x40, 0x00 }, |
115 | { 0x41, 0x00 }, |
116 | { 0x42, 0x00 }, |
117 | { 0x43, 0x00 }, |
118 | { 0x4A, 0x00 }, |
119 | { 0x4B, 0x00 }, |
120 | { 0x4C, 0x00 }, |
121 | { 0x4D, 0x00 }, |
122 | { 0x4E, 0x00 }, |
123 | { 0x50, 0x00 }, |
124 | { 0x51, 0x00 }, |
125 | { 0x55, 0x00 }, |
126 | { 0x58, 0x00 }, |
127 | { 0x59, 0x00 }, |
128 | { 0x5C, 0x00 }, |
129 | { 0xFF, 0x43 }, |
130 | }; |
131 | |
132 | static bool max98371_volatile_register(struct device *dev, unsigned int reg) |
133 | { |
134 | switch (reg) { |
135 | case MAX98371_IRQ_CLEAR1: |
136 | case MAX98371_IRQ_CLEAR2: |
137 | case MAX98371_IRQ_CLEAR3: |
138 | case MAX98371_VERSION: |
139 | return true; |
140 | default: |
141 | return false; |
142 | } |
143 | } |
144 | |
145 | static bool max98371_readable_register(struct device *dev, unsigned int reg) |
146 | { |
147 | switch (reg) { |
148 | case MAX98371_SOFT_RESET: |
149 | return false; |
150 | default: |
151 | return true; |
152 | } |
153 | }; |
154 | |
155 | static const DECLARE_TLV_DB_RANGE(max98371_gain_tlv, |
156 | 0, 7, TLV_DB_SCALE_ITEM(0, 50, 0), |
157 | 8, 10, TLV_DB_SCALE_ITEM(400, 100, 0) |
158 | ); |
159 | |
160 | static const DECLARE_TLV_DB_RANGE(max98371_noload_gain_tlv, |
161 | 0, 11, TLV_DB_SCALE_ITEM(950, 100, 0), |
162 | ); |
163 | |
164 | static const DECLARE_TLV_DB_SCALE(digital_tlv, -6300, 50, 1); |
165 | |
166 | static const struct snd_kcontrol_new max98371_snd_controls[] = { |
167 | SOC_SINGLE_TLV("Speaker Volume", MAX98371_GAIN, |
168 | MAX98371_GAIN_SHIFT, (1<<MAX98371_GAIN_WIDTH)-1, 0, |
169 | max98371_gain_tlv), |
170 | SOC_SINGLE_TLV("Digital Volume", MAX98371_DIGITAL_GAIN, 0, |
171 | (1<<MAX98371_DIGITAL_GAIN_WIDTH)-1, 1, digital_tlv), |
172 | SOC_SINGLE_TLV("Speaker DHT Max Volume", MAX98371_GAIN, |
173 | 0, (1<<MAX98371_DHT_MAX_WIDTH)-1, 0, |
174 | max98371_dht_max_gain), |
175 | SOC_SINGLE_TLV("Speaker DHT Min Volume", MAX98371_DHT_GAIN, |
176 | 0, (1<<MAX98371_DHT_GAIN_WIDTH)-1, 0, |
177 | max98371_dht_min_gain), |
178 | SOC_SINGLE_TLV("Speaker DHT Rotation Volume", MAX98371_DHT_GAIN, |
179 | 0, (1<<MAX98371_DHT_ROT_WIDTH)-1, 0, |
180 | max98371_dht_rot_gain), |
181 | SOC_SINGLE("DHT Attack Step", MAX98371_DHT, MAX98371_DHT_STEP, 3, 0), |
182 | SOC_SINGLE("DHT Attack Rate", MAX98371_DHT, 0, 7, 0), |
183 | SOC_ENUM("Monomix Select", max98371_monomix), |
184 | SOC_ENUM("HPF Cutoff", max98371_hpf_cutoff), |
185 | }; |
186 | |
187 | static int max98371_dai_set_fmt(struct snd_soc_dai *codec_dai, |
188 | unsigned int fmt) |
189 | { |
190 | struct snd_soc_codec *codec = codec_dai->codec; |
191 | struct max98371_priv *max98371 = snd_soc_codec_get_drvdata(codec); |
192 | unsigned int val = 0; |
193 | |
194 | switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { |
195 | case SND_SOC_DAIFMT_CBS_CFS: |
196 | break; |
197 | default: |
198 | dev_err(codec->dev, "DAI clock mode unsupported"); |
199 | return -EINVAL; |
200 | } |
201 | |
202 | switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { |
203 | case SND_SOC_DAIFMT_I2S: |
204 | val |= 0; |
205 | break; |
206 | case SND_SOC_DAIFMT_RIGHT_J: |
207 | val |= MAX98371_DAI_RIGHT; |
208 | break; |
209 | case SND_SOC_DAIFMT_LEFT_J: |
210 | val |= MAX98371_DAI_LEFT; |
211 | break; |
212 | default: |
213 | dev_err(codec->dev, "DAI wrong mode unsupported"); |
214 | return -EINVAL; |
215 | } |
216 | regmap_update_bits(max98371->regmap, MAX98371_FMT, |
217 | MAX98371_FMT_MODE_MASK, val); |
218 | return 0; |
219 | } |
220 | |
221 | static int max98371_dai_hw_params(struct snd_pcm_substream *substream, |
222 | struct snd_pcm_hw_params *params, |
223 | struct snd_soc_dai *dai) |
224 | { |
225 | struct snd_soc_codec *codec = dai->codec; |
226 | struct max98371_priv *max98371 = snd_soc_codec_get_drvdata(codec); |
227 | int blr_clk_ratio, ch_size, channels = params_channels(params); |
228 | int rate = params_rate(params); |
229 | |
230 | switch (params_format(params)) { |
231 | case SNDRV_PCM_FORMAT_S8: |
232 | regmap_update_bits(max98371->regmap, MAX98371_FMT, |
233 | MAX98371_FMT_MASK, MAX98371_DAI_CHANSZ_16); |
234 | ch_size = 8; |
235 | break; |
236 | case SNDRV_PCM_FORMAT_S16_LE: |
237 | regmap_update_bits(max98371->regmap, MAX98371_FMT, |
238 | MAX98371_FMT_MASK, MAX98371_DAI_CHANSZ_16); |
239 | ch_size = 16; |
240 | break; |
241 | case SNDRV_PCM_FORMAT_S24_LE: |
242 | regmap_update_bits(max98371->regmap, MAX98371_FMT, |
243 | MAX98371_FMT_MASK, MAX98371_DAI_CHANSZ_32); |
244 | ch_size = 24; |
245 | break; |
246 | case SNDRV_PCM_FORMAT_S32_LE: |
247 | regmap_update_bits(max98371->regmap, MAX98371_FMT, |
248 | MAX98371_FMT_MASK, MAX98371_DAI_CHANSZ_32); |
249 | ch_size = 32; |
250 | break; |
251 | default: |
252 | return -EINVAL; |
253 | } |
254 | |
255 | /* BCLK/LRCLK ratio calculation */ |
256 | blr_clk_ratio = channels * ch_size; |
257 | switch (blr_clk_ratio) { |
258 | case 32: |
259 | regmap_update_bits(max98371->regmap, |
260 | MAX98371_DAI_CLK, |
261 | MAX98371_DAI_BSEL_MASK, MAX98371_DAI_BSEL_32); |
262 | break; |
263 | case 48: |
264 | regmap_update_bits(max98371->regmap, |
265 | MAX98371_DAI_CLK, |
266 | MAX98371_DAI_BSEL_MASK, MAX98371_DAI_BSEL_48); |
267 | break; |
268 | case 64: |
269 | regmap_update_bits(max98371->regmap, |
270 | MAX98371_DAI_CLK, |
271 | MAX98371_DAI_BSEL_MASK, MAX98371_DAI_BSEL_64); |
272 | break; |
273 | default: |
274 | return -EINVAL; |
275 | } |
276 | |
277 | switch (rate) { |
278 | case 32000: |
279 | regmap_update_bits(max98371->regmap, |
280 | MAX98371_SPK_SR, |
281 | MAX98371_SPK_SR_MASK, MAX98371_SPK_SR_32); |
282 | break; |
283 | case 44100: |
284 | regmap_update_bits(max98371->regmap, |
285 | MAX98371_SPK_SR, |
286 | MAX98371_SPK_SR_MASK, MAX98371_SPK_SR_44); |
287 | break; |
288 | case 48000: |
289 | regmap_update_bits(max98371->regmap, |
290 | MAX98371_SPK_SR, |
291 | MAX98371_SPK_SR_MASK, MAX98371_SPK_SR_48); |
292 | break; |
293 | case 88200: |
294 | regmap_update_bits(max98371->regmap, |
295 | MAX98371_SPK_SR, |
296 | MAX98371_SPK_SR_MASK, MAX98371_SPK_SR_88); |
297 | break; |
298 | case 96000: |
299 | regmap_update_bits(max98371->regmap, |
300 | MAX98371_SPK_SR, |
301 | MAX98371_SPK_SR_MASK, MAX98371_SPK_SR_96); |
302 | break; |
303 | default: |
304 | return -EINVAL; |
305 | } |
306 | |
307 | /* enabling both the RX channels*/ |
308 | regmap_update_bits(max98371->regmap, MAX98371_MONOMIX_SRC, |
309 | MAX98371_MONOMIX_SRC_MASK, MONOMIX_RX_0_1); |
310 | regmap_update_bits(max98371->regmap, MAX98371_DAI_CHANNEL, |
311 | MAX98371_CHANNEL_MASK, MAX98371_CHANNEL_MASK); |
312 | return 0; |
313 | } |
314 | |
315 | static const struct snd_soc_dapm_widget max98371_dapm_widgets[] = { |
316 | SND_SOC_DAPM_DAC("DAC", NULL, MAX98371_SPK_ENABLE, 0, 0), |
317 | SND_SOC_DAPM_SUPPLY("Global Enable", MAX98371_GLOBAL_ENABLE, |
318 | 0, 0, NULL, 0), |
319 | SND_SOC_DAPM_OUTPUT("SPK_OUT"), |
320 | }; |
321 | |
322 | static const struct snd_soc_dapm_route max98371_audio_map[] = { |
323 | {"DAC", NULL, "HiFi Playback"}, |
324 | {"SPK_OUT", NULL, "DAC"}, |
325 | {"SPK_OUT", NULL, "Global Enable"}, |
326 | }; |
327 | |
328 | #define MAX98371_RATES SNDRV_PCM_RATE_8000_48000 |
329 | #define MAX98371_FORMATS (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_BE | \ |
330 | SNDRV_PCM_FMTBIT_S24_BE | SNDRV_PCM_FMTBIT_S32_BE) |
331 | |
332 | static const struct snd_soc_dai_ops max98371_dai_ops = { |
333 | .set_fmt = max98371_dai_set_fmt, |
334 | .hw_params = max98371_dai_hw_params, |
335 | }; |
336 | |
337 | static struct snd_soc_dai_driver max98371_dai[] = { |
338 | { |
339 | .name = "max98371-aif1", |
340 | .playback = { |
341 | .stream_name = "HiFi Playback", |
342 | .channels_min = 1, |
343 | .channels_max = 2, |
344 | .rates = SNDRV_PCM_RATE_8000_48000, |
345 | .formats = MAX98371_FORMATS, |
346 | }, |
347 | .ops = &max98371_dai_ops, |
348 | } |
349 | }; |
350 | |
351 | static const struct snd_soc_codec_driver max98371_codec = { |
352 | .controls = max98371_snd_controls, |
353 | .num_controls = ARRAY_SIZE(max98371_snd_controls), |
354 | .dapm_routes = max98371_audio_map, |
355 | .num_dapm_routes = ARRAY_SIZE(max98371_audio_map), |
356 | .dapm_widgets = max98371_dapm_widgets, |
357 | .num_dapm_widgets = ARRAY_SIZE(max98371_dapm_widgets), |
358 | }; |
359 | |
360 | static const struct regmap_config max98371_regmap = { |
361 | .reg_bits = 8, |
362 | .val_bits = 8, |
363 | .max_register = MAX98371_VERSION, |
364 | .reg_defaults = max98371_reg, |
365 | .num_reg_defaults = ARRAY_SIZE(max98371_reg), |
366 | .volatile_reg = max98371_volatile_register, |
367 | .readable_reg = max98371_readable_register, |
368 | .cache_type = REGCACHE_RBTREE, |
369 | }; |
370 | |
371 | static int max98371_i2c_probe(struct i2c_client *i2c, |
372 | const struct i2c_device_id *id) |
373 | { |
374 | struct max98371_priv *max98371; |
375 | int ret, reg; |
376 | |
377 | max98371 = devm_kzalloc(&i2c->dev, |
378 | sizeof(*max98371), GFP_KERNEL); |
379 | if (!max98371) |
380 | return -ENOMEM; |
381 | |
382 | i2c_set_clientdata(i2c, max98371); |
383 | max98371->regmap = devm_regmap_init_i2c(i2c, &max98371_regmap); |
384 | if (IS_ERR(max98371->regmap)) { |
385 | ret = PTR_ERR(max98371->regmap); |
386 | dev_err(&i2c->dev, |
387 | "Failed to allocate regmap: %d\n", ret); |
388 | return ret; |
389 | } |
390 | |
391 | ret = regmap_read(max98371->regmap, MAX98371_VERSION, ®); |
392 | if (ret < 0) { |
393 | dev_info(&i2c->dev, "device error %d\n", ret); |
394 | return ret; |
395 | } |
396 | dev_info(&i2c->dev, "device version %x\n", reg); |
397 | |
398 | ret = snd_soc_register_codec(&i2c->dev, &max98371_codec, |
399 | max98371_dai, ARRAY_SIZE(max98371_dai)); |
400 | if (ret < 0) { |
401 | dev_err(&i2c->dev, "Failed to register codec: %d\n", ret); |
402 | return ret; |
403 | } |
404 | return ret; |
405 | } |
406 | |
407 | static int max98371_i2c_remove(struct i2c_client *client) |
408 | { |
409 | snd_soc_unregister_codec(&client->dev); |
410 | return 0; |
411 | } |
412 | |
413 | static const struct i2c_device_id max98371_i2c_id[] = { |
414 | { "max98371", 0 }, |
415 | }; |
416 | |
417 | MODULE_DEVICE_TABLE(i2c, max98371_i2c_id); |
418 | |
419 | static const struct of_device_id max98371_of_match[] = { |
420 | { .compatible = "maxim,max98371", }, |
421 | { } |
422 | }; |
423 | MODULE_DEVICE_TABLE(of, max98371_of_match); |
424 | |
425 | static struct i2c_driver max98371_i2c_driver = { |
426 | .driver = { |
427 | .name = "max98371", |
428 | .owner = THIS_MODULE, |
429 | .pm = NULL, |
430 | .of_match_table = of_match_ptr(max98371_of_match), |
431 | }, |
432 | .probe = max98371_i2c_probe, |
433 | .remove = max98371_i2c_remove, |
434 | .id_table = max98371_i2c_id, |
435 | }; |
436 | |
437 | module_i2c_driver(max98371_i2c_driver); |
438 | |
439 | MODULE_AUTHOR("anish kumar <yesanishhere@gmail.com>"); |
440 | MODULE_DESCRIPTION("ALSA SoC MAX98371 driver"); |
441 | MODULE_LICENSE("GPL"); |