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8#include <linux/i2c.h>
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>
16#include "max98371.h"
17
18static const char *const monomix_text[] = {
19 "Left", "Right", "LeftRightDiv2",
20};
21
22static const char *const hpf_cutoff_txt[] = {
23 "Disable", "DC Block", "50Hz",
24 "100Hz", "200Hz", "400Hz", "800Hz",
25};
26
27static SOC_ENUM_SINGLE_DECL(max98371_monomix, MAX98371_MONOMIX_CFG, 0,
28 monomix_text);
29
30static SOC_ENUM_SINGLE_DECL(max98371_hpf_cutoff, MAX98371_HPF, 0,
31 hpf_cutoff_txt);
32
33static 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),
40);
41
42static 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),
49);
50
51static 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),
58);
59
60static const struct reg_default max98371_reg[] = {
61 { 0x01, 0x00 },
62 { 0x02, 0x00 },
63 { 0x03, 0x00 },
64 { 0x04, 0x00 },
65 { 0x05, 0x00 },
66 { 0x06, 0x00 },
67 { 0x07, 0x00 },
68 { 0x08, 0x00 },
69 { 0x09, 0x00 },
70 { 0x0A, 0x00 },
71 { 0x10, 0x06 },
72 { 0x11, 0x08 },
73 { 0x14, 0x80 },
74 { 0x15, 0x00 },
75 { 0x16, 0x00 },
76 { 0x18, 0x00 },
77 { 0x19, 0x00 },
78 { 0x1C, 0x00 },
79 { 0x1D, 0x00 },
80 { 0x1E, 0x00 },
81 { 0x1F, 0x00 },
82 { 0x20, 0x00 },
83 { 0x21, 0x00 },
84 { 0x22, 0x00 },
85 { 0x23, 0x00 },
86 { 0x24, 0x00 },
87 { 0x25, 0x00 },
88 { 0x26, 0x00 },
89 { 0x27, 0x00 },
90 { 0x28, 0x00 },
91 { 0x29, 0x00 },
92 { 0x2A, 0x00 },
93 { 0x2B, 0x00 },
94 { 0x2C, 0x00 },
95 { 0x2D, 0x00 },
96 { 0x2E, 0x0B },
97 { 0x31, 0x00 },
98 { 0x32, 0x18 },
99 { 0x33, 0x00 },
100 { 0x34, 0x00 },
101 { 0x36, 0x00 },
102 { 0x37, 0x00 },
103 { 0x38, 0x00 },
104 { 0x39, 0x00 },
105 { 0x3A, 0x00 },
106 { 0x3B, 0x00 },
107 { 0x3C, 0x00 },
108 { 0x3D, 0x00 },
109 { 0x3E, 0x00 },
110 { 0x3F, 0x00 },
111 { 0x40, 0x00 },
112 { 0x41, 0x00 },
113 { 0x42, 0x00 },
114 { 0x43, 0x00 },
115 { 0x4A, 0x00 },
116 { 0x4B, 0x00 },
117 { 0x4C, 0x00 },
118 { 0x4D, 0x00 },
119 { 0x4E, 0x00 },
120 { 0x50, 0x00 },
121 { 0x51, 0x00 },
122 { 0x55, 0x00 },
123 { 0x58, 0x00 },
124 { 0x59, 0x00 },
125 { 0x5C, 0x00 },
126 { 0xFF, 0x43 },
127};
128
129static bool max98371_volatile_register(struct device *dev, unsigned int reg)
130{
131 switch (reg) {
132 case MAX98371_IRQ_CLEAR1:
133 case MAX98371_IRQ_CLEAR2:
134 case MAX98371_IRQ_CLEAR3:
135 case MAX98371_VERSION:
136 return true;
137 default:
138 return false;
139 }
140}
141
142static bool max98371_readable_register(struct device *dev, unsigned int reg)
143{
144 switch (reg) {
145 case MAX98371_SOFT_RESET:
146 return false;
147 default:
148 return true;
149 }
150};
151
152static 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)
155);
156
157static const DECLARE_TLV_DB_RANGE(max98371_noload_gain_tlv,
158 0, 11, TLV_DB_SCALE_ITEM(950, 100, 0),
159);
160
161static const DECLARE_TLV_DB_SCALE(digital_tlv, -6300, 50, 1);
162
163static 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,
166 max98371_gain_tlv),
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),
182};
183
184static int max98371_dai_set_fmt(struct snd_soc_dai *codec_dai,
185 unsigned int fmt)
186{
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;
190
191 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
192 case SND_SOC_DAIFMT_CBS_CFS:
193 break;
194 default:
195 dev_err(component->dev, "DAI clock mode unsupported");
196 return -EINVAL;
197 }
198
199 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
200 case SND_SOC_DAIFMT_I2S:
201 val |= 0;
202 break;
203 case SND_SOC_DAIFMT_RIGHT_J:
204 val |= MAX98371_DAI_RIGHT;
205 break;
206 case SND_SOC_DAIFMT_LEFT_J:
207 val |= MAX98371_DAI_LEFT;
208 break;
209 default:
210 dev_err(component->dev, "DAI wrong mode unsupported");
211 return -EINVAL;
212 }
213 regmap_update_bits(max98371->regmap, MAX98371_FMT,
214 MAX98371_FMT_MODE_MASK, val);
215 return 0;
216}
217
218static int max98371_dai_hw_params(struct snd_pcm_substream *substream,
219 struct snd_pcm_hw_params *params,
220 struct snd_soc_dai *dai)
221{
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);
226
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);
231 ch_size = 8;
232 break;
233 case SNDRV_PCM_FORMAT_S16_LE:
234 regmap_update_bits(max98371->regmap, MAX98371_FMT,
235 MAX98371_FMT_MASK, MAX98371_DAI_CHANSZ_16);
236 ch_size = 16;
237 break;
238 case SNDRV_PCM_FORMAT_S24_LE:
239 regmap_update_bits(max98371->regmap, MAX98371_FMT,
240 MAX98371_FMT_MASK, MAX98371_DAI_CHANSZ_32);
241 ch_size = 24;
242 break;
243 case SNDRV_PCM_FORMAT_S32_LE:
244 regmap_update_bits(max98371->regmap, MAX98371_FMT,
245 MAX98371_FMT_MASK, MAX98371_DAI_CHANSZ_32);
246 ch_size = 32;
247 break;
248 default:
249 return -EINVAL;
250 }
251
252
253 blr_clk_ratio = channels * ch_size;
254 switch (blr_clk_ratio) {
255 case 32:
256 regmap_update_bits(max98371->regmap,
257 MAX98371_DAI_CLK,
258 MAX98371_DAI_BSEL_MASK, MAX98371_DAI_BSEL_32);
259 break;
260 case 48:
261 regmap_update_bits(max98371->regmap,
262 MAX98371_DAI_CLK,
263 MAX98371_DAI_BSEL_MASK, MAX98371_DAI_BSEL_48);
264 break;
265 case 64:
266 regmap_update_bits(max98371->regmap,
267 MAX98371_DAI_CLK,
268 MAX98371_DAI_BSEL_MASK, MAX98371_DAI_BSEL_64);
269 break;
270 default:
271 return -EINVAL;
272 }
273
274 switch (rate) {
275 case 32000:
276 regmap_update_bits(max98371->regmap,
277 MAX98371_SPK_SR,
278 MAX98371_SPK_SR_MASK, MAX98371_SPK_SR_32);
279 break;
280 case 44100:
281 regmap_update_bits(max98371->regmap,
282 MAX98371_SPK_SR,
283 MAX98371_SPK_SR_MASK, MAX98371_SPK_SR_44);
284 break;
285 case 48000:
286 regmap_update_bits(max98371->regmap,
287 MAX98371_SPK_SR,
288 MAX98371_SPK_SR_MASK, MAX98371_SPK_SR_48);
289 break;
290 case 88200:
291 regmap_update_bits(max98371->regmap,
292 MAX98371_SPK_SR,
293 MAX98371_SPK_SR_MASK, MAX98371_SPK_SR_88);
294 break;
295 case 96000:
296 regmap_update_bits(max98371->regmap,
297 MAX98371_SPK_SR,
298 MAX98371_SPK_SR_MASK, MAX98371_SPK_SR_96);
299 break;
300 default:
301 return -EINVAL;
302 }
303
304
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);
309 return 0;
310}
311
312static 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,
315 0, 0, NULL, 0),
316 SND_SOC_DAPM_OUTPUT("SPK_OUT"),
317};
318
319static 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"},
323};
324
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)
328
329static const struct snd_soc_dai_ops max98371_dai_ops = {
330 .set_fmt = max98371_dai_set_fmt,
331 .hw_params = max98371_dai_hw_params,
332};
333
334static struct snd_soc_dai_driver max98371_dai[] = {
335 {
336 .name = "max98371-aif1",
337 .playback = {
338 .stream_name = "HiFi Playback",
339 .channels_min = 1,
340 .channels_max = 2,
341 .rates = SNDRV_PCM_RATE_8000_48000,
342 .formats = MAX98371_FORMATS,
343 },
344 .ops = &max98371_dai_ops,
345 }
346};
347
348static 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),
355 .idle_bias_on = 1,
356 .use_pmdown_time = 1,
357 .endianness = 1,
358 .non_legacy_dai_naming = 1,
359};
360
361static const struct regmap_config max98371_regmap = {
362 .reg_bits = 8,
363 .val_bits = 8,
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,
370};
371
372static int max98371_i2c_probe(struct i2c_client *i2c,
373 const struct i2c_device_id *id)
374{
375 struct max98371_priv *max98371;
376 int ret, reg;
377
378 max98371 = devm_kzalloc(&i2c->dev,
379 sizeof(*max98371), GFP_KERNEL);
380 if (!max98371)
381 return -ENOMEM;
382
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);
387 dev_err(&i2c->dev,
388 "Failed to allocate regmap: %d\n", ret);
389 return ret;
390 }
391
392 ret = regmap_read(max98371->regmap, MAX98371_VERSION, ®);
393 if (ret < 0) {
394 dev_info(&i2c->dev, "device error %d\n", ret);
395 return ret;
396 }
397 dev_info(&i2c->dev, "device version %x\n", reg);
398
399 ret = devm_snd_soc_register_component(&i2c->dev, &max98371_component,
400 max98371_dai, ARRAY_SIZE(max98371_dai));
401 if (ret < 0) {
402 dev_err(&i2c->dev, "Failed to register component: %d\n", ret);
403 return ret;
404 }
405 return ret;
406}
407
408static const struct i2c_device_id max98371_i2c_id[] = {
409 { "max98371", 0 },
410 { }
411};
412
413MODULE_DEVICE_TABLE(i2c, max98371_i2c_id);
414
415static const struct of_device_id max98371_of_match[] = {
416 { .compatible = "maxim,max98371", },
417 { }
418};
419MODULE_DEVICE_TABLE(of, max98371_of_match);
420
421static struct i2c_driver max98371_i2c_driver = {
422 .driver = {
423 .name = "max98371",
424 .pm = NULL,
425 .of_match_table = of_match_ptr(max98371_of_match),
426 },
427 .probe = max98371_i2c_probe,
428 .id_table = max98371_i2c_id,
429};
430
431module_i2c_driver(max98371_i2c_driver);
432
433MODULE_AUTHOR("anish kumar <yesanishhere@gmail.com>");
434MODULE_DESCRIPTION("ALSA SoC MAX98371 driver");
435MODULE_LICENSE("GPL");
436
