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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
21static const char *const monomix_text[] = {
22 "Left", "Right", "LeftRightDiv2",
23};
24
25static const char *const hpf_cutoff_txt[] = {
26 "Disable", "DC Block", "50Hz",
27 "100Hz", "200Hz", "400Hz", "800Hz",
28};
29
30static SOC_ENUM_SINGLE_DECL(max98371_monomix, MAX98371_MONOMIX_CFG, 0,
31 monomix_text);
32
33static SOC_ENUM_SINGLE_DECL(max98371_hpf_cutoff, MAX98371_HPF, 0,
34 hpf_cutoff_txt);
35
36static 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
45static 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
54static 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
63static 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 },
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
132static 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
145static 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
155static 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
160static const DECLARE_TLV_DB_RANGE(max98371_noload_gain_tlv,
161 0, 11, TLV_DB_SCALE_ITEM(950, 100, 0),
162);
163
164static const DECLARE_TLV_DB_SCALE(digital_tlv, -6300, 50, 1);
165
166static 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
187static int max98371_dai_set_fmt(struct snd_soc_dai *codec_dai,
188 unsigned int fmt)
189{
190 struct snd_soc_component *component = codec_dai->component;
191 struct max98371_priv *max98371 = snd_soc_component_get_drvdata(component);
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(component->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(component->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
221static 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_component *component = dai->component;
226 struct max98371_priv *max98371 = snd_soc_component_get_drvdata(component);
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
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
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
315static 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
322static 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
332static 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
337static 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
351static const struct snd_soc_component_driver max98371_component = {
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 .idle_bias_on = 1,
359 .use_pmdown_time = 1,
360 .endianness = 1,
361 .non_legacy_dai_naming = 1,
362};
363
364static const struct regmap_config max98371_regmap = {
365 .reg_bits = 8,
366 .val_bits = 8,
367 .max_register = MAX98371_VERSION,
368 .reg_defaults = max98371_reg,
369 .num_reg_defaults = ARRAY_SIZE(max98371_reg),
370 .volatile_reg = max98371_volatile_register,
371 .readable_reg = max98371_readable_register,
372 .cache_type = REGCACHE_RBTREE,
373};
374
375static int max98371_i2c_probe(struct i2c_client *i2c,
376 const struct i2c_device_id *id)
377{
378 struct max98371_priv *max98371;
379 int ret, reg;
380
381 max98371 = devm_kzalloc(&i2c->dev,
382 sizeof(*max98371), GFP_KERNEL);
383 if (!max98371)
384 return -ENOMEM;
385
386 i2c_set_clientdata(i2c, max98371);
387 max98371->regmap = devm_regmap_init_i2c(i2c, &max98371_regmap);
388 if (IS_ERR(max98371->regmap)) {
389 ret = PTR_ERR(max98371->regmap);
390 dev_err(&i2c->dev,
391 "Failed to allocate regmap: %d\n", ret);
392 return ret;
393 }
394
395 ret = regmap_read(max98371->regmap, MAX98371_VERSION, ®);
396 if (ret < 0) {
397 dev_info(&i2c->dev, "device error %d\n", ret);
398 return ret;
399 }
400 dev_info(&i2c->dev, "device version %x\n", reg);
401
402 ret = devm_snd_soc_register_component(&i2c->dev, &max98371_component,
403 max98371_dai, ARRAY_SIZE(max98371_dai));
404 if (ret < 0) {
405 dev_err(&i2c->dev, "Failed to register component: %d\n", ret);
406 return ret;
407 }
408 return ret;
409}
410
411static const struct i2c_device_id max98371_i2c_id[] = {
412 { "max98371", 0 },
413 { }
414};
415
416MODULE_DEVICE_TABLE(i2c, max98371_i2c_id);
417
418static const struct of_device_id max98371_of_match[] = {
419 { .compatible = "maxim,max98371", },
420 { }
421};
422MODULE_DEVICE_TABLE(of, max98371_of_match);
423
424static struct i2c_driver max98371_i2c_driver = {
425 .driver = {
426 .name = "max98371",
427 .pm = NULL,
428 .of_match_table = of_match_ptr(max98371_of_match),
429 },
430 .probe = max98371_i2c_probe,
431 .id_table = max98371_i2c_id,
432};
433
434module_i2c_driver(max98371_i2c_driver);
435
436MODULE_AUTHOR("anish kumar <yesanishhere@gmail.com>");
437MODULE_DESCRIPTION("ALSA SoC MAX98371 driver");
438MODULE_LICENSE("GPL");
439
