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