1
2
3
4
5
6#include <linux/delay.h>
7#include <linux/i2c.h>
8#include <linux/module.h>
9#include <linux/regmap.h>
10#include <linux/slab.h>
11#include <linux/cdev.h>
12#include <sound/pcm.h>
13#include <sound/pcm_params.h>
14#include <sound/soc.h>
15#include <sound/tlv.h>
16#include "max98926.h"
17
18static const char * const max98926_boost_voltage_txt[] = {
19 "8.5V", "8.25V", "8.0V", "7.75V", "7.5V", "7.25V", "7.0V", "6.75V",
20 "6.5V", "6.5V", "6.5V", "6.5V", "6.5V", "6.5V", "6.5V", "6.5V"
21};
22
23static const char * const max98926_boost_current_txt[] = {
24 "0.6", "0.8", "1.0", "1.2", "1.4", "1.6", "1.8", "2.0",
25 "2.2", "2.4", "2.6", "2.8", "3.2", "3.6", "4.0", "4.4"
26};
27
28static const char *const max98926_dai_txt[] = {
29 "Left", "Right", "LeftRight", "LeftRightDiv2",
30};
31
32static const char *const max98926_pdm_ch_text[] = {
33 "Current", "Voltage",
34};
35
36static const char *const max98926_hpf_cutoff_txt[] = {
37 "Disable", "DC Block", "100Hz",
38 "200Hz", "400Hz", "800Hz",
39};
40
41static const struct reg_default max98926_reg[] = {
42 { 0x0B, 0x00 },
43 { 0x0C, 0x00 },
44 { 0x0D, 0x00 },
45 { 0x0E, 0x00 },
46 { 0x0F, 0x00 },
47 { 0x10, 0x00 },
48 { 0x11, 0xC0 },
49 { 0x12, 0x00 },
50 { 0x13, 0x00 },
51 { 0x14, 0xF0 },
52 { 0x15, 0x00 },
53 { 0x16, 0xAB },
54 { 0x17, 0x89 },
55 { 0x18, 0x00 },
56 { 0x19, 0x00 },
57 { 0x1A, 0x04 },
58 { 0x1B, 0x00 },
59 { 0x1C, 0x00 },
60 { 0x1D, 0x00 },
61 { 0x1E, 0xF0 },
62 { 0x1F, 0x00 },
63 { 0x20, 0x50 },
64 { 0x21, 0x00 },
65 { 0x22, 0x00 },
66 { 0x23, 0x00 },
67 { 0x24, 0x00 },
68 { 0x25, 0x00 },
69 { 0x26, 0x00 },
70 { 0x27, 0xFF },
71 { 0x28, 0xFF },
72 { 0x29, 0xFF },
73 { 0x2A, 0xFF },
74 { 0x2B, 0x02 },
75 { 0x2C, 0x90 },
76 { 0x2D, 0x00 },
77 { 0x2E, 0x02 },
78 { 0x2F, 0x00 },
79 { 0x30, 0x0A },
80 { 0x31, 0x00 },
81 { 0x32, 0x80 },
82 { 0x33, 0x00 },
83 { 0x34, 0x92 },
84 { 0x35, 0x01 },
85 { 0x36, 0x00 },
86 { 0x37, 0x00 },
87 { 0x38, 0x00 },
88 { 0x3A, 0x00 },
89};
90
91static const struct soc_enum max98926_voltage_enum[] = {
92 SOC_ENUM_SINGLE(MAX98926_DAI_CLK_DIV_N_LSBS, 0,
93 ARRAY_SIZE(max98926_pdm_ch_text),
94 max98926_pdm_ch_text),
95};
96
97static const struct snd_kcontrol_new max98926_voltage_control =
98 SOC_DAPM_ENUM("Route", max98926_voltage_enum);
99
100static const struct soc_enum max98926_current_enum[] = {
101 SOC_ENUM_SINGLE(MAX98926_DAI_CLK_DIV_N_LSBS,
102 MAX98926_PDM_SOURCE_1_SHIFT,
103 ARRAY_SIZE(max98926_pdm_ch_text),
104 max98926_pdm_ch_text),
105};
106
107static const struct snd_kcontrol_new max98926_current_control =
108 SOC_DAPM_ENUM("Route", max98926_current_enum);
109
110static const struct snd_kcontrol_new max98926_mixer_controls[] = {
111 SOC_DAPM_SINGLE("PCM Single Switch", MAX98926_SPK_AMP,
112 MAX98926_INSELECT_MODE_SHIFT, 0, 0),
113 SOC_DAPM_SINGLE("PDM Single Switch", MAX98926_SPK_AMP,
114 MAX98926_INSELECT_MODE_SHIFT, 1, 0),
115};
116
117static const struct snd_kcontrol_new max98926_dai_controls[] = {
118 SOC_DAPM_SINGLE("Left", MAX98926_GAIN,
119 MAX98926_DAC_IN_SEL_SHIFT, 0, 0),
120 SOC_DAPM_SINGLE("Right", MAX98926_GAIN,
121 MAX98926_DAC_IN_SEL_SHIFT, 1, 0),
122 SOC_DAPM_SINGLE("LeftRight", MAX98926_GAIN,
123 MAX98926_DAC_IN_SEL_SHIFT, 2, 0),
124 SOC_DAPM_SINGLE("(Left+Right)/2 Switch", MAX98926_GAIN,
125 MAX98926_DAC_IN_SEL_SHIFT, 3, 0),
126};
127
128static const struct snd_soc_dapm_widget max98926_dapm_widgets[] = {
129 SND_SOC_DAPM_AIF_IN("DAI_OUT", "HiFi Playback", 0,
130 SND_SOC_NOPM, 0, 0),
131 SND_SOC_DAPM_DAC("Amp Enable", NULL, MAX98926_BLOCK_ENABLE,
132 MAX98926_SPK_EN_SHIFT, 0),
133 SND_SOC_DAPM_SUPPLY("Global Enable", MAX98926_GLOBAL_ENABLE,
134 MAX98926_EN_SHIFT, 0, NULL, 0),
135 SND_SOC_DAPM_SUPPLY("VI Enable", MAX98926_BLOCK_ENABLE,
136 MAX98926_ADC_IMON_EN_WIDTH |
137 MAX98926_ADC_VMON_EN_SHIFT,
138 0, NULL, 0),
139 SND_SOC_DAPM_PGA("BST Enable", MAX98926_BLOCK_ENABLE,
140 MAX98926_BST_EN_SHIFT, 0, NULL, 0),
141 SND_SOC_DAPM_OUTPUT("BE_OUT"),
142 SND_SOC_DAPM_MIXER("PCM Sel", MAX98926_SPK_AMP,
143 MAX98926_INSELECT_MODE_SHIFT, 0,
144 &max98926_mixer_controls[0],
145 ARRAY_SIZE(max98926_mixer_controls)),
146 SND_SOC_DAPM_MIXER("DAI Sel",
147 MAX98926_GAIN, MAX98926_DAC_IN_SEL_SHIFT, 0,
148 &max98926_dai_controls[0],
149 ARRAY_SIZE(max98926_dai_controls)),
150 SND_SOC_DAPM_MUX("PDM CH1 Source",
151 MAX98926_DAI_CLK_DIV_N_LSBS,
152 MAX98926_PDM_CURRENT_SHIFT,
153 0, &max98926_current_control),
154 SND_SOC_DAPM_MUX("PDM CH0 Source",
155 MAX98926_DAI_CLK_DIV_N_LSBS,
156 MAX98926_PDM_VOLTAGE_SHIFT,
157 0, &max98926_voltage_control),
158};
159
160static const struct snd_soc_dapm_route max98926_audio_map[] = {
161 {"VI Enable", NULL, "DAI_OUT"},
162 {"DAI Sel", "Left", "VI Enable"},
163 {"DAI Sel", "Right", "VI Enable"},
164 {"DAI Sel", "LeftRight", "VI Enable"},
165 {"DAI Sel", "LeftRightDiv2", "VI Enable"},
166 {"PCM Sel", "PCM", "DAI Sel"},
167
168 {"PDM CH1 Source", "Current", "DAI_OUT"},
169 {"PDM CH1 Source", "Voltage", "DAI_OUT"},
170 {"PDM CH0 Source", "Current", "DAI_OUT"},
171 {"PDM CH0 Source", "Voltage", "DAI_OUT"},
172 {"PCM Sel", "Analog", "PDM CH1 Source"},
173 {"PCM Sel", "Analog", "PDM CH0 Source"},
174 {"Amp Enable", NULL, "PCM Sel"},
175
176 {"BST Enable", NULL, "Amp Enable"},
177 {"BE_OUT", NULL, "BST Enable"},
178};
179
180static bool max98926_volatile_register(struct device *dev, unsigned int reg)
181{
182 switch (reg) {
183 case MAX98926_VBAT_DATA:
184 case MAX98926_VBST_DATA:
185 case MAX98926_LIVE_STATUS0:
186 case MAX98926_LIVE_STATUS1:
187 case MAX98926_LIVE_STATUS2:
188 case MAX98926_STATE0:
189 case MAX98926_STATE1:
190 case MAX98926_STATE2:
191 case MAX98926_FLAG0:
192 case MAX98926_FLAG1:
193 case MAX98926_FLAG2:
194 case MAX98926_VERSION:
195 return true;
196 default:
197 return false;
198 }
199}
200
201static bool max98926_readable_register(struct device *dev, unsigned int reg)
202{
203 switch (reg) {
204 case MAX98926_IRQ_CLEAR0:
205 case MAX98926_IRQ_CLEAR1:
206 case MAX98926_IRQ_CLEAR2:
207 case MAX98926_ALC_HOLD_RLS:
208 return false;
209 default:
210 return true;
211 }
212};
213
214static DECLARE_TLV_DB_SCALE(max98926_spk_tlv, -600, 100, 0);
215static DECLARE_TLV_DB_RANGE(max98926_current_tlv,
216 0, 11, TLV_DB_SCALE_ITEM(20, 20, 0),
217 12, 15, TLV_DB_SCALE_ITEM(320, 40, 0),
218);
219
220static SOC_ENUM_SINGLE_DECL(max98926_dac_hpf_cutoff,
221 MAX98926_FILTERS, MAX98926_DAC_HPF_SHIFT,
222 max98926_hpf_cutoff_txt);
223
224static SOC_ENUM_SINGLE_DECL(max98926_boost_voltage,
225 MAX98926_CONFIGURATION, MAX98926_BST_VOUT_SHIFT,
226 max98926_boost_voltage_txt);
227
228static const struct snd_kcontrol_new max98926_snd_controls[] = {
229 SOC_SINGLE_TLV("Speaker Volume", MAX98926_GAIN,
230 MAX98926_SPK_GAIN_SHIFT,
231 (1<<MAX98926_SPK_GAIN_WIDTH)-1, 0,
232 max98926_spk_tlv),
233 SOC_SINGLE("Ramp Switch", MAX98926_GAIN_RAMPING,
234 MAX98926_SPK_RMP_EN_SHIFT, 1, 0),
235 SOC_SINGLE("ZCD Switch", MAX98926_GAIN_RAMPING,
236 MAX98926_SPK_ZCD_EN_SHIFT, 1, 0),
237 SOC_SINGLE("ALC Switch", MAX98926_THRESHOLD,
238 MAX98926_ALC_EN_SHIFT, 1, 0),
239 SOC_SINGLE("ALC Threshold", MAX98926_THRESHOLD,
240 MAX98926_ALC_TH_SHIFT,
241 (1<<MAX98926_ALC_TH_WIDTH)-1, 0),
242 SOC_ENUM("Boost Output Voltage", max98926_boost_voltage),
243 SOC_SINGLE_TLV("Boost Current Limit", MAX98926_BOOST_LIMITER,
244 MAX98926_BST_ILIM_SHIFT,
245 (1<<MAX98926_BST_ILIM_SHIFT)-1, 0,
246 max98926_current_tlv),
247 SOC_ENUM("DAC HPF Cutoff", max98926_dac_hpf_cutoff),
248 SOC_DOUBLE("PDM Channel One", MAX98926_DAI_CLK_DIV_N_LSBS,
249 MAX98926_PDM_CHANNEL_1_SHIFT,
250 MAX98926_PDM_CHANNEL_1_HIZ, 1, 0),
251 SOC_DOUBLE("PDM Channel Zero", MAX98926_DAI_CLK_DIV_N_LSBS,
252 MAX98926_PDM_CHANNEL_0_SHIFT,
253 MAX98926_PDM_CHANNEL_0_HIZ, 1, 0),
254};
255
256static const struct {
257 int rate;
258 int sr;
259} rate_table[] = {
260 {
261 .rate = 8000,
262 .sr = 0,
263 },
264 {
265 .rate = 11025,
266 .sr = 1,
267 },
268 {
269 .rate = 12000,
270 .sr = 2,
271 },
272 {
273 .rate = 16000,
274 .sr = 3,
275 },
276 {
277 .rate = 22050,
278 .sr = 4,
279 },
280 {
281 .rate = 24000,
282 .sr = 5,
283 },
284 {
285 .rate = 32000,
286 .sr = 6,
287 },
288 {
289 .rate = 44100,
290 .sr = 7,
291 },
292 {
293 .rate = 48000,
294 .sr = 8,
295 },
296};
297
298static void max98926_set_sense_data(struct max98926_priv *max98926)
299{
300 regmap_update_bits(max98926->regmap,
301 MAX98926_DOUT_CFG_VMON,
302 MAX98926_DAI_VMON_EN_MASK,
303 MAX98926_DAI_VMON_EN_MASK);
304 regmap_update_bits(max98926->regmap,
305 MAX98926_DOUT_CFG_IMON,
306 MAX98926_DAI_IMON_EN_MASK,
307 MAX98926_DAI_IMON_EN_MASK);
308
309 if (!max98926->interleave_mode) {
310
311 regmap_update_bits(max98926->regmap,
312 MAX98926_DOUT_CFG_VMON,
313 MAX98926_DAI_VMON_SLOT_MASK,
314 max98926->v_slot);
315
316 regmap_update_bits(max98926->regmap,
317 MAX98926_DOUT_CFG_IMON,
318 MAX98926_DAI_IMON_SLOT_MASK,
319 max98926->i_slot);
320 } else {
321
322 regmap_update_bits(max98926->regmap,
323 MAX98926_FORMAT,
324 MAX98926_DAI_INTERLEAVE_MASK,
325 MAX98926_DAI_INTERLEAVE_MASK);
326
327 regmap_update_bits(max98926->regmap,
328 MAX98926_DOUT_CFG_VBAT,
329 MAX98926_DAI_INTERLEAVE_SLOT_MASK,
330 max98926->v_slot);
331 }
332}
333
334static int max98926_dai_set_fmt(struct snd_soc_dai *codec_dai,
335 unsigned int fmt)
336{
337 struct snd_soc_component *component = codec_dai->component;
338 struct max98926_priv *max98926 = snd_soc_component_get_drvdata(component);
339 unsigned int invert = 0;
340
341 dev_dbg(component->dev, "%s: fmt 0x%08X\n", __func__, fmt);
342
343 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
344 case SND_SOC_DAIFMT_CBS_CFS:
345 max98926_set_sense_data(max98926);
346 break;
347 default:
348 dev_err(component->dev, "DAI clock mode unsupported\n");
349 return -EINVAL;
350 }
351
352 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
353 case SND_SOC_DAIFMT_NB_NF:
354 break;
355 case SND_SOC_DAIFMT_NB_IF:
356 invert = MAX98926_DAI_WCI_MASK;
357 break;
358 case SND_SOC_DAIFMT_IB_NF:
359 invert = MAX98926_DAI_BCI_MASK;
360 break;
361 case SND_SOC_DAIFMT_IB_IF:
362 invert = MAX98926_DAI_BCI_MASK | MAX98926_DAI_WCI_MASK;
363 break;
364 default:
365 dev_err(component->dev, "DAI invert mode unsupported\n");
366 return -EINVAL;
367 }
368
369 regmap_write(max98926->regmap,
370 MAX98926_FORMAT, MAX98926_DAI_DLY_MASK);
371 regmap_update_bits(max98926->regmap, MAX98926_FORMAT,
372 MAX98926_DAI_BCI_MASK, invert);
373 return 0;
374}
375
376static int max98926_dai_hw_params(struct snd_pcm_substream *substream,
377 struct snd_pcm_hw_params *params,
378 struct snd_soc_dai *dai)
379{
380 int dai_sr = -EINVAL;
381 int rate = params_rate(params), i;
382 struct snd_soc_component *component = dai->component;
383 struct max98926_priv *max98926 = snd_soc_component_get_drvdata(component);
384 int blr_clk_ratio;
385
386 switch (params_format(params)) {
387 case SNDRV_PCM_FORMAT_S16_LE:
388 regmap_update_bits(max98926->regmap,
389 MAX98926_FORMAT,
390 MAX98926_DAI_CHANSZ_MASK,
391 MAX98926_DAI_CHANSZ_16);
392 max98926->ch_size = 16;
393 break;
394 case SNDRV_PCM_FORMAT_S24_LE:
395 regmap_update_bits(max98926->regmap,
396 MAX98926_FORMAT,
397 MAX98926_DAI_CHANSZ_MASK,
398 MAX98926_DAI_CHANSZ_24);
399 max98926->ch_size = 24;
400 break;
401 case SNDRV_PCM_FORMAT_S32_LE:
402 regmap_update_bits(max98926->regmap,
403 MAX98926_FORMAT,
404 MAX98926_DAI_CHANSZ_MASK,
405 MAX98926_DAI_CHANSZ_32);
406 max98926->ch_size = 32;
407 break;
408 default:
409 dev_dbg(component->dev, "format unsupported %d\n",
410 params_format(params));
411 return -EINVAL;
412 }
413
414
415 blr_clk_ratio = params_channels(params) * max98926->ch_size;
416
417 switch (blr_clk_ratio) {
418 case 32:
419 regmap_update_bits(max98926->regmap,
420 MAX98926_DAI_CLK_MODE2,
421 MAX98926_DAI_BSEL_MASK,
422 MAX98926_DAI_BSEL_32);
423 break;
424 case 48:
425 regmap_update_bits(max98926->regmap,
426 MAX98926_DAI_CLK_MODE2,
427 MAX98926_DAI_BSEL_MASK,
428 MAX98926_DAI_BSEL_48);
429 break;
430 case 64:
431 regmap_update_bits(max98926->regmap,
432 MAX98926_DAI_CLK_MODE2,
433 MAX98926_DAI_BSEL_MASK,
434 MAX98926_DAI_BSEL_64);
435 break;
436 default:
437 return -EINVAL;
438 }
439
440
441 for (i = 0; i < ARRAY_SIZE(rate_table); i++) {
442 if (rate_table[i].rate >= rate) {
443 dai_sr = rate_table[i].sr;
444 break;
445 }
446 }
447 if (dai_sr < 0)
448 return -EINVAL;
449
450
451 regmap_update_bits(max98926->regmap,
452 MAX98926_DAI_CLK_MODE2,
453 MAX98926_DAI_SR_MASK, dai_sr << MAX98926_DAI_SR_SHIFT);
454 return 0;
455}
456
457#define MAX98926_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | \
458 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
459
460static const struct snd_soc_dai_ops max98926_dai_ops = {
461 .set_fmt = max98926_dai_set_fmt,
462 .hw_params = max98926_dai_hw_params,
463};
464
465static struct snd_soc_dai_driver max98926_dai[] = {
466{
467 .name = "max98926-aif1",
468 .playback = {
469 .stream_name = "HiFi Playback",
470 .channels_min = 1,
471 .channels_max = 2,
472 .rates = SNDRV_PCM_RATE_8000_48000,
473 .formats = MAX98926_FORMATS,
474 },
475 .capture = {
476 .stream_name = "HiFi Capture",
477 .channels_min = 1,
478 .channels_max = 2,
479 .rates = SNDRV_PCM_RATE_8000_48000,
480 .formats = MAX98926_FORMATS,
481 },
482 .ops = &max98926_dai_ops,
483}
484};
485
486static int max98926_probe(struct snd_soc_component *component)
487{
488 struct max98926_priv *max98926 = snd_soc_component_get_drvdata(component);
489
490 max98926->component = component;
491
492
493 regmap_write(max98926->regmap, MAX98926_DOUT_HIZ_CFG4, 0xF0);
494 return 0;
495}
496
497static const struct snd_soc_component_driver soc_component_dev_max98926 = {
498 .probe = max98926_probe,
499 .controls = max98926_snd_controls,
500 .num_controls = ARRAY_SIZE(max98926_snd_controls),
501 .dapm_routes = max98926_audio_map,
502 .num_dapm_routes = ARRAY_SIZE(max98926_audio_map),
503 .dapm_widgets = max98926_dapm_widgets,
504 .num_dapm_widgets = ARRAY_SIZE(max98926_dapm_widgets),
505 .idle_bias_on = 1,
506 .use_pmdown_time = 1,
507 .endianness = 1,
508 .non_legacy_dai_naming = 1,
509};
510
511static const struct regmap_config max98926_regmap = {
512 .reg_bits = 8,
513 .val_bits = 8,
514 .max_register = MAX98926_VERSION,
515 .reg_defaults = max98926_reg,
516 .num_reg_defaults = ARRAY_SIZE(max98926_reg),
517 .volatile_reg = max98926_volatile_register,
518 .readable_reg = max98926_readable_register,
519 .cache_type = REGCACHE_RBTREE,
520};
521
522static int max98926_i2c_probe(struct i2c_client *i2c,
523 const struct i2c_device_id *id)
524{
525 int ret, reg;
526 u32 value;
527 struct max98926_priv *max98926;
528
529 max98926 = devm_kzalloc(&i2c->dev,
530 sizeof(*max98926), GFP_KERNEL);
531 if (!max98926)
532 return -ENOMEM;
533
534 i2c_set_clientdata(i2c, max98926);
535 max98926->regmap = devm_regmap_init_i2c(i2c, &max98926_regmap);
536 if (IS_ERR(max98926->regmap)) {
537 ret = PTR_ERR(max98926->regmap);
538 dev_err(&i2c->dev,
539 "Failed to allocate regmap: %d\n", ret);
540 goto err_out;
541 }
542 if (of_property_read_bool(i2c->dev.of_node, "interleave-mode"))
543 max98926->interleave_mode = true;
544
545 if (!of_property_read_u32(i2c->dev.of_node, "vmon-slot-no", &value)) {
546 if (value > MAX98926_DAI_VMON_SLOT_1E_1F) {
547 dev_err(&i2c->dev, "vmon slot number is wrong:\n");
548 return -EINVAL;
549 }
550 max98926->v_slot = value;
551 }
552 if (!of_property_read_u32(i2c->dev.of_node, "imon-slot-no", &value)) {
553 if (value > MAX98926_DAI_IMON_SLOT_1E_1F) {
554 dev_err(&i2c->dev, "imon slot number is wrong:\n");
555 return -EINVAL;
556 }
557 max98926->i_slot = value;
558 }
559 ret = regmap_read(max98926->regmap,
560 MAX98926_VERSION, ®);
561 if (ret < 0) {
562 dev_err(&i2c->dev, "Failed to read: %x\n", reg);
563 return ret;
564 }
565
566 ret = devm_snd_soc_register_component(&i2c->dev,
567 &soc_component_dev_max98926,
568 max98926_dai, ARRAY_SIZE(max98926_dai));
569 if (ret < 0)
570 dev_err(&i2c->dev,
571 "Failed to register component: %d\n", ret);
572 dev_info(&i2c->dev, "device version: %x\n", reg);
573err_out:
574 return ret;
575}
576
577static const struct i2c_device_id max98926_i2c_id[] = {
578 { "max98926", 0 },
579 { }
580};
581MODULE_DEVICE_TABLE(i2c, max98926_i2c_id);
582
583static const struct of_device_id max98926_of_match[] = {
584 { .compatible = "maxim,max98926", },
585 { }
586};
587MODULE_DEVICE_TABLE(of, max98926_of_match);
588
589static struct i2c_driver max98926_i2c_driver = {
590 .driver = {
591 .name = "max98926",
592 .of_match_table = of_match_ptr(max98926_of_match),
593 .pm = NULL,
594 },
595 .probe = max98926_i2c_probe,
596 .id_table = max98926_i2c_id,
597};
598
599module_i2c_driver(max98926_i2c_driver)
600MODULE_DESCRIPTION("ALSA SoC MAX98926 driver");
601MODULE_AUTHOR("Anish kumar <anish.kumar@maximintegrated.com>");
602MODULE_LICENSE("GPL");
603
