1
2
3
4
5
6
7
8#include <linux/delay.h>
9#include <linux/i2c.h>
10#include <linux/module.h>
11#include <linux/regmap.h>
12#include <linux/slab.h>
13#include <linux/cdev.h>
14#include <sound/pcm.h>
15#include <sound/pcm_params.h>
16#include <sound/soc.h>
17#include <sound/tlv.h>
18#include "max98926.h"
19
20static const char * const max98926_boost_voltage_txt[] = {
21 "8.5V", "8.25V", "8.0V", "7.75V", "7.5V", "7.25V", "7.0V", "6.75V",
22 "6.5V", "6.5V", "6.5V", "6.5V", "6.5V", "6.5V", "6.5V", "6.5V"
23};
24
25static const char * const max98926_boost_current_txt[] = {
26 "0.6", "0.8", "1.0", "1.2", "1.4", "1.6", "1.8", "2.0",
27 "2.2", "2.4", "2.6", "2.8", "3.2", "3.6", "4.0", "4.4"
28};
29
30static const char *const max98926_dai_txt[] = {
31 "Left", "Right", "LeftRight", "LeftRightDiv2",
32};
33
34static const char *const max98926_pdm_ch_text[] = {
35 "Current", "Voltage",
36};
37
38static const char *const max98926_hpf_cutoff_txt[] = {
39 "Disable", "DC Block", "100Hz",
40 "200Hz", "400Hz", "800Hz",
41};
42
43static const struct reg_default max98926_reg[] = {
44 { 0x0B, 0x00 },
45 { 0x0C, 0x00 },
46 { 0x0D, 0x00 },
47 { 0x0E, 0x00 },
48 { 0x0F, 0x00 },
49 { 0x10, 0x00 },
50 { 0x11, 0xC0 },
51 { 0x12, 0x00 },
52 { 0x13, 0x00 },
53 { 0x14, 0xF0 },
54 { 0x15, 0x00 },
55 { 0x16, 0xAB },
56 { 0x17, 0x89 },
57 { 0x18, 0x00 },
58 { 0x19, 0x00 },
59 { 0x1A, 0x04 },
60 { 0x1B, 0x00 },
61 { 0x1C, 0x00 },
62 { 0x1D, 0x00 },
63 { 0x1E, 0xF0 },
64 { 0x1F, 0x00 },
65 { 0x20, 0x50 },
66 { 0x21, 0x00 },
67 { 0x22, 0x00 },
68 { 0x23, 0x00 },
69 { 0x24, 0x00 },
70 { 0x25, 0x00 },
71 { 0x26, 0x00 },
72 { 0x27, 0xFF },
73 { 0x28, 0xFF },
74 { 0x29, 0xFF },
75 { 0x2A, 0xFF },
76 { 0x2B, 0x02 },
77 { 0x2C, 0x90 },
78 { 0x2D, 0x00 },
79 { 0x2E, 0x02 },
80 { 0x2F, 0x00 },
81 { 0x30, 0x0A },
82 { 0x31, 0x00 },
83 { 0x32, 0x80 },
84 { 0x33, 0x00 },
85 { 0x34, 0x92 },
86 { 0x35, 0x01 },
87 { 0x36, 0x00 },
88 { 0x37, 0x00 },
89 { 0x38, 0x00 },
90 { 0x3A, 0x00 },
91};
92
93static const struct soc_enum max98926_voltage_enum[] = {
94 SOC_ENUM_SINGLE(MAX98926_DAI_CLK_DIV_N_LSBS, 0,
95 ARRAY_SIZE(max98926_pdm_ch_text),
96 max98926_pdm_ch_text),
97};
98
99static const struct snd_kcontrol_new max98926_voltage_control =
100 SOC_DAPM_ENUM("Route", max98926_voltage_enum);
101
102static const struct soc_enum max98926_current_enum[] = {
103 SOC_ENUM_SINGLE(MAX98926_DAI_CLK_DIV_N_LSBS,
104 MAX98926_PDM_SOURCE_1_SHIFT,
105 ARRAY_SIZE(max98926_pdm_ch_text),
106 max98926_pdm_ch_text),
107};
108
109static const struct snd_kcontrol_new max98926_current_control =
110 SOC_DAPM_ENUM("Route", max98926_current_enum);
111
112static const struct snd_kcontrol_new max98926_mixer_controls[] = {
113 SOC_DAPM_SINGLE("PCM Single Switch", MAX98926_SPK_AMP,
114 MAX98926_INSELECT_MODE_SHIFT, 0, 0),
115 SOC_DAPM_SINGLE("PDM Single Switch", MAX98926_SPK_AMP,
116 MAX98926_INSELECT_MODE_SHIFT, 1, 0),
117};
118
119static const struct snd_kcontrol_new max98926_dai_controls[] = {
120 SOC_DAPM_SINGLE("Left", MAX98926_GAIN,
121 MAX98926_DAC_IN_SEL_SHIFT, 0, 0),
122 SOC_DAPM_SINGLE("Right", MAX98926_GAIN,
123 MAX98926_DAC_IN_SEL_SHIFT, 1, 0),
124 SOC_DAPM_SINGLE("LeftRight", MAX98926_GAIN,
125 MAX98926_DAC_IN_SEL_SHIFT, 2, 0),
126 SOC_DAPM_SINGLE("(Left+Right)/2 Switch", MAX98926_GAIN,
127 MAX98926_DAC_IN_SEL_SHIFT, 3, 0),
128};
129
130static const struct snd_soc_dapm_widget max98926_dapm_widgets[] = {
131 SND_SOC_DAPM_AIF_IN("DAI_OUT", "HiFi Playback", 0,
132 SND_SOC_NOPM, 0, 0),
133 SND_SOC_DAPM_DAC("Amp Enable", NULL, MAX98926_BLOCK_ENABLE,
134 MAX98926_SPK_EN_SHIFT, 0),
135 SND_SOC_DAPM_SUPPLY("Global Enable", MAX98926_GLOBAL_ENABLE,
136 MAX98926_EN_SHIFT, 0, NULL, 0),
137 SND_SOC_DAPM_SUPPLY("VI Enable", MAX98926_BLOCK_ENABLE,
138 MAX98926_ADC_IMON_EN_WIDTH |
139 MAX98926_ADC_VMON_EN_SHIFT,
140 0, NULL, 0),
141 SND_SOC_DAPM_PGA("BST Enable", MAX98926_BLOCK_ENABLE,
142 MAX98926_BST_EN_SHIFT, 0, NULL, 0),
143 SND_SOC_DAPM_OUTPUT("BE_OUT"),
144 SND_SOC_DAPM_MIXER("PCM Sel", MAX98926_SPK_AMP,
145 MAX98926_INSELECT_MODE_SHIFT, 0,
146 &max98926_mixer_controls[0],
147 ARRAY_SIZE(max98926_mixer_controls)),
148 SND_SOC_DAPM_MIXER("DAI Sel",
149 MAX98926_GAIN, MAX98926_DAC_IN_SEL_SHIFT, 0,
150 &max98926_dai_controls[0],
151 ARRAY_SIZE(max98926_dai_controls)),
152 SND_SOC_DAPM_MUX("PDM CH1 Source",
153 MAX98926_DAI_CLK_DIV_N_LSBS,
154 MAX98926_PDM_CURRENT_SHIFT,
155 0, &max98926_current_control),
156 SND_SOC_DAPM_MUX("PDM CH0 Source",
157 MAX98926_DAI_CLK_DIV_N_LSBS,
158 MAX98926_PDM_VOLTAGE_SHIFT,
159 0, &max98926_voltage_control),
160};
161
162static const struct snd_soc_dapm_route max98926_audio_map[] = {
163 {"VI Enable", NULL, "DAI_OUT"},
164 {"DAI Sel", "Left", "VI Enable"},
165 {"DAI Sel", "Right", "VI Enable"},
166 {"DAI Sel", "LeftRight", "VI Enable"},
167 {"DAI Sel", "LeftRightDiv2", "VI Enable"},
168 {"PCM Sel", "PCM", "DAI Sel"},
169
170 {"PDM CH1 Source", "Current", "DAI_OUT"},
171 {"PDM CH1 Source", "Voltage", "DAI_OUT"},
172 {"PDM CH0 Source", "Current", "DAI_OUT"},
173 {"PDM CH0 Source", "Voltage", "DAI_OUT"},
174 {"PCM Sel", "Analog", "PDM CH1 Source"},
175 {"PCM Sel", "Analog", "PDM CH0 Source"},
176 {"Amp Enable", NULL, "PCM Sel"},
177
178 {"BST Enable", NULL, "Amp Enable"},
179 {"BE_OUT", NULL, "BST Enable"},
180};
181
182static bool max98926_volatile_register(struct device *dev, unsigned int reg)
183{
184 switch (reg) {
185 case MAX98926_VBAT_DATA:
186 case MAX98926_VBST_DATA:
187 case MAX98926_LIVE_STATUS0:
188 case MAX98926_LIVE_STATUS1:
189 case MAX98926_LIVE_STATUS2:
190 case MAX98926_STATE0:
191 case MAX98926_STATE1:
192 case MAX98926_STATE2:
193 case MAX98926_FLAG0:
194 case MAX98926_FLAG1:
195 case MAX98926_FLAG2:
196 case MAX98926_VERSION:
197 return true;
198 default:
199 return false;
200 }
201}
202
203static bool max98926_readable_register(struct device *dev, unsigned int reg)
204{
205 switch (reg) {
206 case MAX98926_IRQ_CLEAR0:
207 case MAX98926_IRQ_CLEAR1:
208 case MAX98926_IRQ_CLEAR2:
209 case MAX98926_ALC_HOLD_RLS:
210 return false;
211 default:
212 return true;
213 }
214};
215
216static DECLARE_TLV_DB_SCALE(max98926_spk_tlv, -600, 100, 0);
217static DECLARE_TLV_DB_RANGE(max98926_current_tlv,
218 0, 11, TLV_DB_SCALE_ITEM(20, 20, 0),
219 12, 15, TLV_DB_SCALE_ITEM(320, 40, 0),
220);
221
222static SOC_ENUM_SINGLE_DECL(max98926_dac_hpf_cutoff,
223 MAX98926_FILTERS, MAX98926_DAC_HPF_SHIFT,
224 max98926_hpf_cutoff_txt);
225
226static SOC_ENUM_SINGLE_DECL(max98926_boost_voltage,
227 MAX98926_CONFIGURATION, MAX98926_BST_VOUT_SHIFT,
228 max98926_boost_voltage_txt);
229
230static const struct snd_kcontrol_new max98926_snd_controls[] = {
231 SOC_SINGLE_TLV("Speaker Volume", MAX98926_GAIN,
232 MAX98926_SPK_GAIN_SHIFT,
233 (1<<MAX98926_SPK_GAIN_WIDTH)-1, 0,
234 max98926_spk_tlv),
235 SOC_SINGLE("Ramp Switch", MAX98926_GAIN_RAMPING,
236 MAX98926_SPK_RMP_EN_SHIFT, 1, 0),
237 SOC_SINGLE("ZCD Switch", MAX98926_GAIN_RAMPING,
238 MAX98926_SPK_ZCD_EN_SHIFT, 1, 0),
239 SOC_SINGLE("ALC Switch", MAX98926_THRESHOLD,
240 MAX98926_ALC_EN_SHIFT, 1, 0),
241 SOC_SINGLE("ALC Threshold", MAX98926_THRESHOLD,
242 MAX98926_ALC_TH_SHIFT,
243 (1<<MAX98926_ALC_TH_WIDTH)-1, 0),
244 SOC_ENUM("Boost Output Voltage", max98926_boost_voltage),
245 SOC_SINGLE_TLV("Boost Current Limit", MAX98926_BOOST_LIMITER,
246 MAX98926_BST_ILIM_SHIFT,
247 (1<<MAX98926_BST_ILIM_SHIFT)-1, 0,
248 max98926_current_tlv),
249 SOC_ENUM("DAC HPF Cutoff", max98926_dac_hpf_cutoff),
250 SOC_DOUBLE("PDM Channel One", MAX98926_DAI_CLK_DIV_N_LSBS,
251 MAX98926_PDM_CHANNEL_1_SHIFT,
252 MAX98926_PDM_CHANNEL_1_HIZ, 1, 0),
253 SOC_DOUBLE("PDM Channel Zero", MAX98926_DAI_CLK_DIV_N_LSBS,
254 MAX98926_PDM_CHANNEL_0_SHIFT,
255 MAX98926_PDM_CHANNEL_0_HIZ, 1, 0),
256};
257
258static const struct {
259 int rate;
260 int sr;
261} rate_table[] = {
262 {
263 .rate = 8000,
264 .sr = 0,
265 },
266 {
267 .rate = 11025,
268 .sr = 1,
269 },
270 {
271 .rate = 12000,
272 .sr = 2,
273 },
274 {
275 .rate = 16000,
276 .sr = 3,
277 },
278 {
279 .rate = 22050,
280 .sr = 4,
281 },
282 {
283 .rate = 24000,
284 .sr = 5,
285 },
286 {
287 .rate = 32000,
288 .sr = 6,
289 },
290 {
291 .rate = 44100,
292 .sr = 7,
293 },
294 {
295 .rate = 48000,
296 .sr = 8,
297 },
298};
299
300static void max98926_set_sense_data(struct max98926_priv *max98926)
301{
302 regmap_update_bits(max98926->regmap,
303 MAX98926_DOUT_CFG_VMON,
304 MAX98926_DAI_VMON_EN_MASK,
305 MAX98926_DAI_VMON_EN_MASK);
306 regmap_update_bits(max98926->regmap,
307 MAX98926_DOUT_CFG_IMON,
308 MAX98926_DAI_IMON_EN_MASK,
309 MAX98926_DAI_IMON_EN_MASK);
310
311 if (!max98926->interleave_mode) {
312
313 regmap_update_bits(max98926->regmap,
314 MAX98926_DOUT_CFG_VMON,
315 MAX98926_DAI_VMON_SLOT_MASK,
316 max98926->v_slot);
317
318 regmap_update_bits(max98926->regmap,
319 MAX98926_DOUT_CFG_IMON,
320 MAX98926_DAI_IMON_SLOT_MASK,
321 max98926->i_slot);
322 } else {
323
324 regmap_update_bits(max98926->regmap,
325 MAX98926_FORMAT,
326 MAX98926_DAI_INTERLEAVE_MASK,
327 MAX98926_DAI_INTERLEAVE_MASK);
328
329 regmap_update_bits(max98926->regmap,
330 MAX98926_DOUT_CFG_VBAT,
331 MAX98926_DAI_INTERLEAVE_SLOT_MASK,
332 max98926->v_slot);
333 }
334}
335
336static int max98926_dai_set_fmt(struct snd_soc_dai *codec_dai,
337 unsigned int fmt)
338{
339 struct snd_soc_component *component = codec_dai->component;
340 struct max98926_priv *max98926 = snd_soc_component_get_drvdata(component);
341 unsigned int invert = 0;
342
343 dev_dbg(component->dev, "%s: fmt 0x%08X\n", __func__, fmt);
344
345 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
346 case SND_SOC_DAIFMT_CBS_CFS:
347 max98926_set_sense_data(max98926);
348 break;
349 default:
350 dev_err(component->dev, "DAI clock mode unsupported\n");
351 return -EINVAL;
352 }
353
354 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
355 case SND_SOC_DAIFMT_NB_NF:
356 break;
357 case SND_SOC_DAIFMT_NB_IF:
358 invert = MAX98926_DAI_WCI_MASK;
359 break;
360 case SND_SOC_DAIFMT_IB_NF:
361 invert = MAX98926_DAI_BCI_MASK;
362 break;
363 case SND_SOC_DAIFMT_IB_IF:
364 invert = MAX98926_DAI_BCI_MASK | MAX98926_DAI_WCI_MASK;
365 break;
366 default:
367 dev_err(component->dev, "DAI invert mode unsupported\n");
368 return -EINVAL;
369 }
370
371 regmap_write(max98926->regmap,
372 MAX98926_FORMAT, MAX98926_DAI_DLY_MASK);
373 regmap_update_bits(max98926->regmap, MAX98926_FORMAT,
374 MAX98926_DAI_BCI_MASK, invert);
375 return 0;
376}
377
378static int max98926_dai_hw_params(struct snd_pcm_substream *substream,
379 struct snd_pcm_hw_params *params,
380 struct snd_soc_dai *dai)
381{
382 int dai_sr = -EINVAL;
383 int rate = params_rate(params), i;
384 struct snd_soc_component *component = dai->component;
385 struct max98926_priv *max98926 = snd_soc_component_get_drvdata(component);
386 int blr_clk_ratio;
387
388 switch (params_format(params)) {
389 case SNDRV_PCM_FORMAT_S16_LE:
390 regmap_update_bits(max98926->regmap,
391 MAX98926_FORMAT,
392 MAX98926_DAI_CHANSZ_MASK,
393 MAX98926_DAI_CHANSZ_16);
394 max98926->ch_size = 16;
395 break;
396 case SNDRV_PCM_FORMAT_S24_LE:
397 regmap_update_bits(max98926->regmap,
398 MAX98926_FORMAT,
399 MAX98926_DAI_CHANSZ_MASK,
400 MAX98926_DAI_CHANSZ_24);
401 max98926->ch_size = 24;
402 break;
403 case SNDRV_PCM_FORMAT_S32_LE:
404 regmap_update_bits(max98926->regmap,
405 MAX98926_FORMAT,
406 MAX98926_DAI_CHANSZ_MASK,
407 MAX98926_DAI_CHANSZ_32);
408 max98926->ch_size = 32;
409 break;
410 default:
411 dev_dbg(component->dev, "format unsupported %d\n",
412 params_format(params));
413 return -EINVAL;
414 }
415
416
417 blr_clk_ratio = params_channels(params) * max98926->ch_size;
418
419 switch (blr_clk_ratio) {
420 case 32:
421 regmap_update_bits(max98926->regmap,
422 MAX98926_DAI_CLK_MODE2,
423 MAX98926_DAI_BSEL_MASK,
424 MAX98926_DAI_BSEL_32);
425 break;
426 case 48:
427 regmap_update_bits(max98926->regmap,
428 MAX98926_DAI_CLK_MODE2,
429 MAX98926_DAI_BSEL_MASK,
430 MAX98926_DAI_BSEL_48);
431 break;
432 case 64:
433 regmap_update_bits(max98926->regmap,
434 MAX98926_DAI_CLK_MODE2,
435 MAX98926_DAI_BSEL_MASK,
436 MAX98926_DAI_BSEL_64);
437 break;
438 default:
439 return -EINVAL;
440 }
441
442
443 for (i = 0; i < ARRAY_SIZE(rate_table); i++) {
444 if (rate_table[i].rate >= rate) {
445 dai_sr = rate_table[i].sr;
446 break;
447 }
448 }
449 if (dai_sr < 0)
450 return -EINVAL;
451
452
453 regmap_update_bits(max98926->regmap,
454 MAX98926_DAI_CLK_MODE2,
455 MAX98926_DAI_SR_MASK, dai_sr << MAX98926_DAI_SR_SHIFT);
456 return 0;
457}
458
459#define MAX98926_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | \
460 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
461
462static const struct snd_soc_dai_ops max98926_dai_ops = {
463 .set_fmt = max98926_dai_set_fmt,
464 .hw_params = max98926_dai_hw_params,
465};
466
467static struct snd_soc_dai_driver max98926_dai[] = {
468{
469 .name = "max98926-aif1",
470 .playback = {
471 .stream_name = "HiFi Playback",
472 .channels_min = 1,
473 .channels_max = 2,
474 .rates = SNDRV_PCM_RATE_8000_48000,
475 .formats = MAX98926_FORMATS,
476 },
477 .capture = {
478 .stream_name = "HiFi Capture",
479 .channels_min = 1,
480 .channels_max = 2,
481 .rates = SNDRV_PCM_RATE_8000_48000,
482 .formats = MAX98926_FORMATS,
483 },
484 .ops = &max98926_dai_ops,
485}
486};
487
488static int max98926_probe(struct snd_soc_component *component)
489{
490 struct max98926_priv *max98926 = snd_soc_component_get_drvdata(component);
491
492 max98926->component = component;
493
494
495 regmap_write(max98926->regmap, MAX98926_DOUT_HIZ_CFG4, 0xF0);
496 return 0;
497}
498
499static const struct snd_soc_component_driver soc_component_dev_max98926 = {
500 .probe = max98926_probe,
501 .controls = max98926_snd_controls,
502 .num_controls = ARRAY_SIZE(max98926_snd_controls),
503 .dapm_routes = max98926_audio_map,
504 .num_dapm_routes = ARRAY_SIZE(max98926_audio_map),
505 .dapm_widgets = max98926_dapm_widgets,
506 .num_dapm_widgets = ARRAY_SIZE(max98926_dapm_widgets),
507 .idle_bias_on = 1,
508 .use_pmdown_time = 1,
509 .endianness = 1,
510 .non_legacy_dai_naming = 1,
511};
512
513static const struct regmap_config max98926_regmap = {
514 .reg_bits = 8,
515 .val_bits = 8,
516 .max_register = MAX98926_VERSION,
517 .reg_defaults = max98926_reg,
518 .num_reg_defaults = ARRAY_SIZE(max98926_reg),
519 .volatile_reg = max98926_volatile_register,
520 .readable_reg = max98926_readable_register,
521 .cache_type = REGCACHE_RBTREE,
522};
523
524static int max98926_i2c_probe(struct i2c_client *i2c,
525 const struct i2c_device_id *id)
526{
527 int ret, reg;
528 u32 value;
529 struct max98926_priv *max98926;
530
531 max98926 = devm_kzalloc(&i2c->dev,
532 sizeof(*max98926), GFP_KERNEL);
533 if (!max98926)
534 return -ENOMEM;
535
536 i2c_set_clientdata(i2c, max98926);
537 max98926->regmap = devm_regmap_init_i2c(i2c, &max98926_regmap);
538 if (IS_ERR(max98926->regmap)) {
539 ret = PTR_ERR(max98926->regmap);
540 dev_err(&i2c->dev,
541 "Failed to allocate regmap: %d\n", ret);
542 goto err_out;
543 }
544 if (of_property_read_bool(i2c->dev.of_node, "interleave-mode"))
545 max98926->interleave_mode = true;
546
547 if (!of_property_read_u32(i2c->dev.of_node, "vmon-slot-no", &value)) {
548 if (value > MAX98926_DAI_VMON_SLOT_1E_1F) {
549 dev_err(&i2c->dev, "vmon slot number is wrong:\n");
550 return -EINVAL;
551 }
552 max98926->v_slot = value;
553 }
554 if (!of_property_read_u32(i2c->dev.of_node, "imon-slot-no", &value)) {
555 if (value > MAX98926_DAI_IMON_SLOT_1E_1F) {
556 dev_err(&i2c->dev, "imon slot number is wrong:\n");
557 return -EINVAL;
558 }
559 max98926->i_slot = value;
560 }
561 ret = regmap_read(max98926->regmap,
562 MAX98926_VERSION, ®);
563 if (ret < 0) {
564 dev_err(&i2c->dev, "Failed to read: %x\n", reg);
565 return ret;
566 }
567
568 ret = devm_snd_soc_register_component(&i2c->dev,
569 &soc_component_dev_max98926,
570 max98926_dai, ARRAY_SIZE(max98926_dai));
571 if (ret < 0)
572 dev_err(&i2c->dev,
573 "Failed to register component: %d\n", ret);
574 dev_info(&i2c->dev, "device version: %x\n", reg);
575err_out:
576 return ret;
577}
578
579static const struct i2c_device_id max98926_i2c_id[] = {
580 { "max98926", 0 },
581 { }
582};
583MODULE_DEVICE_TABLE(i2c, max98926_i2c_id);
584
585static const struct of_device_id max98926_of_match[] = {
586 { .compatible = "maxim,max98926", },
587 { }
588};
589MODULE_DEVICE_TABLE(of, max98926_of_match);
590
591static struct i2c_driver max98926_i2c_driver = {
592 .driver = {
593 .name = "max98926",
594 .of_match_table = of_match_ptr(max98926_of_match),
595 .pm = NULL,
596 },
597 .probe = max98926_i2c_probe,
598 .id_table = max98926_i2c_id,
599};
600
601module_i2c_driver(max98926_i2c_driver)
602MODULE_DESCRIPTION("ALSA SoC MAX98926 driver");
603MODULE_AUTHOR("Anish kumar <anish.kumar@maximintegrated.com>");
604MODULE_LICENSE("GPL");
605
