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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * max98926.c -- ALSA SoC MAX98926 driver
4 * Copyright 2013-15 Maxim Integrated Products
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 }, /* IRQ Enable0 */
34 { 0x0C, 0x00 }, /* IRQ Enable1 */
35 { 0x0D, 0x00 }, /* IRQ Enable2 */
36 { 0x0E, 0x00 }, /* IRQ Clear0 */
37 { 0x0F, 0x00 }, /* IRQ Clear1 */
38 { 0x10, 0x00 }, /* IRQ Clear2 */
39 { 0x11, 0xC0 }, /* Map0 */
40 { 0x12, 0x00 }, /* Map1 */
41 { 0x13, 0x00 }, /* Map2 */
42 { 0x14, 0xF0 }, /* Map3 */
43 { 0x15, 0x00 }, /* Map4 */
44 { 0x16, 0xAB }, /* Map5 */
45 { 0x17, 0x89 }, /* Map6 */
46 { 0x18, 0x00 }, /* Map7 */
47 { 0x19, 0x00 }, /* Map8 */
48 { 0x1A, 0x04 }, /* DAI Clock Mode 1 */
49 { 0x1B, 0x00 }, /* DAI Clock Mode 2 */
50 { 0x1C, 0x00 }, /* DAI Clock Divider Denominator MSBs */
51 { 0x1D, 0x00 }, /* DAI Clock Divider Denominator LSBs */
52 { 0x1E, 0xF0 }, /* DAI Clock Divider Numerator MSBs */
53 { 0x1F, 0x00 }, /* DAI Clock Divider Numerator LSBs */
54 { 0x20, 0x50 }, /* Format */
55 { 0x21, 0x00 }, /* TDM Slot Select */
56 { 0x22, 0x00 }, /* DOUT Configuration VMON */
57 { 0x23, 0x00 }, /* DOUT Configuration IMON */
58 { 0x24, 0x00 }, /* DOUT Configuration VBAT */
59 { 0x25, 0x00 }, /* DOUT Configuration VBST */
60 { 0x26, 0x00 }, /* DOUT Configuration FLAG */
61 { 0x27, 0xFF }, /* DOUT HiZ Configuration 1 */
62 { 0x28, 0xFF }, /* DOUT HiZ Configuration 2 */
63 { 0x29, 0xFF }, /* DOUT HiZ Configuration 3 */
64 { 0x2A, 0xFF }, /* DOUT HiZ Configuration 4 */
65 { 0x2B, 0x02 }, /* DOUT Drive Strength */
66 { 0x2C, 0x90 }, /* Filters */
67 { 0x2D, 0x00 }, /* Gain */
68 { 0x2E, 0x02 }, /* Gain Ramping */
69 { 0x2F, 0x00 }, /* Speaker Amplifier */
70 { 0x30, 0x0A }, /* Threshold */
71 { 0x31, 0x00 }, /* ALC Attack */
72 { 0x32, 0x80 }, /* ALC Atten and Release */
73 { 0x33, 0x00 }, /* ALC Infinite Hold Release */
74 { 0x34, 0x92 }, /* ALC Configuration */
75 { 0x35, 0x01 }, /* Boost Converter */
76 { 0x36, 0x00 }, /* Block Enable */
77 { 0x37, 0x00 }, /* Configuration */
78 { 0x38, 0x00 }, /* Global Enable */
79 { 0x3A, 0x00 }, /* Boost Limiter */
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 /* set VMON slots */
302 regmap_update_bits(max98926->regmap,
303 MAX98926_DOUT_CFG_VMON,
304 MAX98926_DAI_VMON_SLOT_MASK,
305 max98926->v_slot);
306 /* set IMON slots */
307 regmap_update_bits(max98926->regmap,
308 MAX98926_DOUT_CFG_IMON,
309 MAX98926_DAI_IMON_SLOT_MASK,
310 max98926->i_slot);
311 } else {
312 /* enable interleave mode */
313 regmap_update_bits(max98926->regmap,
314 MAX98926_FORMAT,
315 MAX98926_DAI_INTERLEAVE_MASK,
316 MAX98926_DAI_INTERLEAVE_MASK);
317 /* set interleave slots */
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_CLOCK_PROVIDER_MASK) {
335 case SND_SOC_DAIFMT_CBC_CFC:
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 /* BCLK/LRCLK ratio calculation */
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 /* find the closest rate */
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 /* set DAI_SR to correct LRCLK frequency */
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 /* Hi-Z all the slots */
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};
500
501static const struct regmap_config max98926_regmap = {
502 .reg_bits = 8,
503 .val_bits = 8,
504 .max_register = MAX98926_VERSION,
505 .reg_defaults = max98926_reg,
506 .num_reg_defaults = ARRAY_SIZE(max98926_reg),
507 .volatile_reg = max98926_volatile_register,
508 .readable_reg = max98926_readable_register,
509 .cache_type = REGCACHE_RBTREE,
510};
511
512static int max98926_i2c_probe(struct i2c_client *i2c)
513{
514 int ret, reg;
515 u32 value;
516 struct max98926_priv *max98926;
517
518 max98926 = devm_kzalloc(&i2c->dev,
519 sizeof(*max98926), GFP_KERNEL);
520 if (!max98926)
521 return -ENOMEM;
522
523 i2c_set_clientdata(i2c, max98926);
524 max98926->regmap = devm_regmap_init_i2c(i2c, &max98926_regmap);
525 if (IS_ERR(max98926->regmap)) {
526 ret = PTR_ERR(max98926->regmap);
527 dev_err(&i2c->dev,
528 "Failed to allocate regmap: %d\n", ret);
529 goto err_out;
530 }
531 if (of_property_read_bool(i2c->dev.of_node, "maxim,interleave-mode") ||
532 of_property_read_bool(i2c->dev.of_node, "interleave-mode"))
533 max98926->interleave_mode = true;
534
535 if (!of_property_read_u32(i2c->dev.of_node, "vmon-slot-no", &value)) {
536 if (value > MAX98926_DAI_VMON_SLOT_1E_1F) {
537 dev_err(&i2c->dev, "vmon slot number is wrong:\n");
538 return -EINVAL;
539 }
540 max98926->v_slot = value;
541 }
542 if (!of_property_read_u32(i2c->dev.of_node, "imon-slot-no", &value)) {
543 if (value > MAX98926_DAI_IMON_SLOT_1E_1F) {
544 dev_err(&i2c->dev, "imon slot number is wrong:\n");
545 return -EINVAL;
546 }
547 max98926->i_slot = value;
548 }
549 ret = regmap_read(max98926->regmap,
550 MAX98926_VERSION, ®);
551 if (ret < 0) {
552 dev_err(&i2c->dev, "Failed to read: %x\n", reg);
553 return ret;
554 }
555
556 ret = devm_snd_soc_register_component(&i2c->dev,
557 &soc_component_dev_max98926,
558 max98926_dai, ARRAY_SIZE(max98926_dai));
559 if (ret < 0)
560 dev_err(&i2c->dev,
561 "Failed to register component: %d\n", ret);
562 dev_info(&i2c->dev, "device version: %x\n", reg);
563err_out:
564 return ret;
565}
566
567static const struct i2c_device_id max98926_i2c_id[] = {
568 { "max98926", 0 },
569 { }
570};
571MODULE_DEVICE_TABLE(i2c, max98926_i2c_id);
572
573#ifdef CONFIG_OF
574static const struct of_device_id max98926_of_match[] = {
575 { .compatible = "maxim,max98926", },
576 { }
577};
578MODULE_DEVICE_TABLE(of, max98926_of_match);
579#endif
580
581static struct i2c_driver max98926_i2c_driver = {
582 .driver = {
583 .name = "max98926",
584 .of_match_table = of_match_ptr(max98926_of_match),
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");
1/*
2 * max98926.c -- ALSA SoC MAX98926 driver
3 * Copyright 2013-15 Maxim Integrated Products
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
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 }, /* IRQ Enable0 */
45 { 0x0C, 0x00 }, /* IRQ Enable1 */
46 { 0x0D, 0x00 }, /* IRQ Enable2 */
47 { 0x0E, 0x00 }, /* IRQ Clear0 */
48 { 0x0F, 0x00 }, /* IRQ Clear1 */
49 { 0x10, 0x00 }, /* IRQ Clear2 */
50 { 0x11, 0xC0 }, /* Map0 */
51 { 0x12, 0x00 }, /* Map1 */
52 { 0x13, 0x00 }, /* Map2 */
53 { 0x14, 0xF0 }, /* Map3 */
54 { 0x15, 0x00 }, /* Map4 */
55 { 0x16, 0xAB }, /* Map5 */
56 { 0x17, 0x89 }, /* Map6 */
57 { 0x18, 0x00 }, /* Map7 */
58 { 0x19, 0x00 }, /* Map8 */
59 { 0x1A, 0x04 }, /* DAI Clock Mode 1 */
60 { 0x1B, 0x00 }, /* DAI Clock Mode 2 */
61 { 0x1C, 0x00 }, /* DAI Clock Divider Denominator MSBs */
62 { 0x1D, 0x00 }, /* DAI Clock Divider Denominator LSBs */
63 { 0x1E, 0xF0 }, /* DAI Clock Divider Numerator MSBs */
64 { 0x1F, 0x00 }, /* DAI Clock Divider Numerator LSBs */
65 { 0x20, 0x50 }, /* Format */
66 { 0x21, 0x00 }, /* TDM Slot Select */
67 { 0x22, 0x00 }, /* DOUT Configuration VMON */
68 { 0x23, 0x00 }, /* DOUT Configuration IMON */
69 { 0x24, 0x00 }, /* DOUT Configuration VBAT */
70 { 0x25, 0x00 }, /* DOUT Configuration VBST */
71 { 0x26, 0x00 }, /* DOUT Configuration FLAG */
72 { 0x27, 0xFF }, /* DOUT HiZ Configuration 1 */
73 { 0x28, 0xFF }, /* DOUT HiZ Configuration 2 */
74 { 0x29, 0xFF }, /* DOUT HiZ Configuration 3 */
75 { 0x2A, 0xFF }, /* DOUT HiZ Configuration 4 */
76 { 0x2B, 0x02 }, /* DOUT Drive Strength */
77 { 0x2C, 0x90 }, /* Filters */
78 { 0x2D, 0x00 }, /* Gain */
79 { 0x2E, 0x02 }, /* Gain Ramping */
80 { 0x2F, 0x00 }, /* Speaker Amplifier */
81 { 0x30, 0x0A }, /* Threshold */
82 { 0x31, 0x00 }, /* ALC Attack */
83 { 0x32, 0x80 }, /* ALC Atten and Release */
84 { 0x33, 0x00 }, /* ALC Infinite Hold Release */
85 { 0x34, 0x92 }, /* ALC Configuration */
86 { 0x35, 0x01 }, /* Boost Converter */
87 { 0x36, 0x00 }, /* Block Enable */
88 { 0x37, 0x00 }, /* Configuration */
89 { 0x38, 0x00 }, /* Global Enable */
90 { 0x3A, 0x00 }, /* Boost Limiter */
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 /* set VMON slots */
313 regmap_update_bits(max98926->regmap,
314 MAX98926_DOUT_CFG_VMON,
315 MAX98926_DAI_VMON_SLOT_MASK,
316 max98926->v_slot);
317 /* set IMON slots */
318 regmap_update_bits(max98926->regmap,
319 MAX98926_DOUT_CFG_IMON,
320 MAX98926_DAI_IMON_SLOT_MASK,
321 max98926->i_slot);
322 } else {
323 /* enable interleave mode */
324 regmap_update_bits(max98926->regmap,
325 MAX98926_FORMAT,
326 MAX98926_DAI_INTERLEAVE_MASK,
327 MAX98926_DAI_INTERLEAVE_MASK);
328 /* set interleave slots */
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 /* BCLK/LRCLK ratio calculation */
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 /* find the closest rate */
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 /* set DAI_SR to correct LRCLK frequency */
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 /* Hi-Z all the slots */
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");