1 // SPDX-License-Identifier: GPL-2.0
2 //
3 // MAX9867 ALSA SoC codec driver
4 //
5 // Copyright 2013-2015 Maxim Integrated Products
6 // Copyright 2018 Ladislav Michl <ladis@linux-mips.org>
7 //
8
9 #include <linux/clk.h>
10 #include <linux/delay.h>
11 #include <linux/i2c.h>
12 #include <linux/module.h>
13 #include <linux/regmap.h>
14 #include <sound/pcm_params.h>
15 #include <sound/soc.h>
16 #include <sound/tlv.h>
17 #include "max9867.h"
18
19 struct max9867_priv {
20 struct clk *mclk;
21 struct regmap *regmap;
22 const struct snd_pcm_hw_constraint_list *constraints;
23 unsigned int sysclk, pclk;
24 bool provider, dsp_a;
25 unsigned int adc_dac_active;
26 };
27
28 static const char *const max9867_spmode[] = {
29 "Stereo Diff", "Mono Diff",
30 "Stereo Cap", "Mono Cap",
31 "Stereo Single", "Mono Single",
32 "Stereo Single Fast", "Mono Single Fast"
33 };
34 static const char *const max9867_filter_text[] = {"IIR", "FIR"};
35
36 static const char *const max9867_adc_dac_filter_text[] = {
37 "Disabled",
38 "Elliptical/16/256",
39 "Butterworth/16/500",
40 "Elliptical/8/256",
41 "Butterworth/8/500",
42 "Butterworth/8-24"
43 };
44
45 enum max9867_adc_dac {
46 MAX9867_ADC_LEFT,
47 MAX9867_ADC_RIGHT,
48 MAX9867_DAC_LEFT,
49 MAX9867_DAC_RIGHT,
50 };
51
52 static int max9867_adc_dac_event(struct snd_soc_dapm_widget *w,
53 struct snd_kcontrol *kcontrol, int event)
54 {
55 struct snd_soc_component *component = snd_soc_dapm_to_component(w->dapm);
56 struct max9867_priv *max9867 = snd_soc_component_get_drvdata(component);
57 enum max9867_adc_dac adc_dac;
58
59 if (!snd_soc_dapm_widget_name_cmp(w, "ADCL"))
60 adc_dac = MAX9867_ADC_LEFT;
61 else if (!snd_soc_dapm_widget_name_cmp(w, "ADCR"))
62 adc_dac = MAX9867_ADC_RIGHT;
63 else if (!snd_soc_dapm_widget_name_cmp(w, "DACL"))
64 adc_dac = MAX9867_DAC_LEFT;
65 else if (!snd_soc_dapm_widget_name_cmp(w, "DACR"))
66 adc_dac = MAX9867_DAC_RIGHT;
67 else
68 return 0;
69
70 if (SND_SOC_DAPM_EVENT_ON(event))
71 max9867->adc_dac_active |= BIT(adc_dac);
72 else if (SND_SOC_DAPM_EVENT_OFF(event))
73 max9867->adc_dac_active &= ~BIT(adc_dac);
74
75 return 0;
76 }
77
78 static int max9867_filter_get(struct snd_kcontrol *kcontrol,
79 struct snd_ctl_elem_value *ucontrol)
80 {
81 struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
82 struct max9867_priv *max9867 = snd_soc_component_get_drvdata(component);
83 unsigned int reg;
84 int ret;
85
86 ret = regmap_read(max9867->regmap, MAX9867_CODECFLTR, ®);
87 if (ret)
88 return -EINVAL;
89
90 if (reg & MAX9867_CODECFLTR_MODE)
91 ucontrol->value.enumerated.item[0] = 1;
92 else
93 ucontrol->value.enumerated.item[0] = 0;
94
95 return 0;
96 }
97
98 static int max9867_filter_set(struct snd_kcontrol *kcontrol,
99 struct snd_ctl_elem_value *ucontrol)
100 {
101 struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
102 struct max9867_priv *max9867 = snd_soc_component_get_drvdata(component);
103 unsigned int reg, mode = ucontrol->value.enumerated.item[0];
104 int ret;
105
106 if (mode > 1)
107 return -EINVAL;
108
109 /* don't allow change if ADC/DAC active */
110 if (max9867->adc_dac_active)
111 return -EBUSY;
112
113 /* read current filter mode */
114 ret = regmap_read(max9867->regmap, MAX9867_CODECFLTR, ®);
115 if (ret)
116 return -EINVAL;
117
118 if (mode)
119 mode = MAX9867_CODECFLTR_MODE;
120
121 /* check if change is needed */
122 if ((reg & MAX9867_CODECFLTR_MODE) == mode)
123 return 0;
124
125 /* shutdown codec before switching filter mode */
126 regmap_update_bits(max9867->regmap, MAX9867_PWRMAN,
127 MAX9867_PWRMAN_SHDN, 0);
128
129 /* switch filter mode */
130 regmap_update_bits(max9867->regmap, MAX9867_CODECFLTR,
131 MAX9867_CODECFLTR_MODE, mode);
132
133 /* out of shutdown now */
134 regmap_update_bits(max9867->regmap, MAX9867_PWRMAN,
135 MAX9867_PWRMAN_SHDN, MAX9867_PWRMAN_SHDN);
136
137 return 0;
138 }
139
140 static SOC_ENUM_SINGLE_EXT_DECL(max9867_filter, max9867_filter_text);
141 static SOC_ENUM_SINGLE_DECL(max9867_dac_filter, MAX9867_CODECFLTR, 0,
142 max9867_adc_dac_filter_text);
143 static SOC_ENUM_SINGLE_DECL(max9867_adc_filter, MAX9867_CODECFLTR, 4,
144 max9867_adc_dac_filter_text);
145 static SOC_ENUM_SINGLE_DECL(max9867_spkmode, MAX9867_MODECONFIG, 0,
146 max9867_spmode);
147 static const SNDRV_CTL_TLVD_DECLARE_DB_RANGE(max9867_master_tlv,
148 0, 2, TLV_DB_SCALE_ITEM(-8600, 200, 1),
149 3, 17, TLV_DB_SCALE_ITEM(-7800, 400, 0),
150 18, 25, TLV_DB_SCALE_ITEM(-2000, 200, 0),
151 26, 34, TLV_DB_SCALE_ITEM( -500, 100, 0),
152 35, 40, TLV_DB_SCALE_ITEM( 350, 50, 0),
153 );
154 static DECLARE_TLV_DB_SCALE(max9867_mic_tlv, 0, 100, 0);
155 static DECLARE_TLV_DB_SCALE(max9867_line_tlv, -600, 200, 0);
156 static DECLARE_TLV_DB_SCALE(max9867_adc_tlv, -1200, 100, 0);
157 static DECLARE_TLV_DB_SCALE(max9867_dac_tlv, -1500, 100, 0);
158 static DECLARE_TLV_DB_SCALE(max9867_dacboost_tlv, 0, 600, 0);
159 static const SNDRV_CTL_TLVD_DECLARE_DB_RANGE(max9867_micboost_tlv,
160 0, 2, TLV_DB_SCALE_ITEM(-2000, 2000, 1),
161 3, 3, TLV_DB_SCALE_ITEM(3000, 0, 0),
162 );
163
164 static const struct snd_kcontrol_new max9867_snd_controls[] = {
165 SOC_DOUBLE_R_TLV("Master Playback Volume", MAX9867_LEFTVOL,
166 MAX9867_RIGHTVOL, 0, 40, 1, max9867_master_tlv),
167 SOC_DOUBLE_R_TLV("Line Capture Volume", MAX9867_LEFTLINELVL,
168 MAX9867_RIGHTLINELVL, 0, 15, 1, max9867_line_tlv),
169 SOC_DOUBLE_R_TLV("Mic Capture Volume", MAX9867_LEFTMICGAIN,
170 MAX9867_RIGHTMICGAIN, 0, 20, 1, max9867_mic_tlv),
171 SOC_DOUBLE_R_TLV("Mic Boost Capture Volume", MAX9867_LEFTMICGAIN,
172 MAX9867_RIGHTMICGAIN, 5, 3, 0, max9867_micboost_tlv),
173 SOC_SINGLE("Digital Sidetone Volume", MAX9867_SIDETONE, 0, 31, 1),
174 SOC_SINGLE_TLV("Digital Playback Volume", MAX9867_DACLEVEL, 0, 15, 1,
175 max9867_dac_tlv),
176 SOC_SINGLE_TLV("Digital Boost Playback Volume", MAX9867_DACLEVEL, 4, 3, 0,
177 max9867_dacboost_tlv),
178 SOC_DOUBLE_TLV("Digital Capture Volume", MAX9867_ADCLEVEL, 4, 0, 15, 1,
179 max9867_adc_tlv),
180 SOC_ENUM("Speaker Mode", max9867_spkmode),
181 SOC_SINGLE("Volume Smoothing Switch", MAX9867_MODECONFIG, 6, 1, 0),
182 SOC_SINGLE("Line ZC Switch", MAX9867_MODECONFIG, 5, 1, 0),
183 SOC_ENUM_EXT("DSP Filter", max9867_filter, max9867_filter_get, max9867_filter_set),
184 SOC_ENUM("ADC Filter", max9867_adc_filter),
185 SOC_ENUM("DAC Filter", max9867_dac_filter),
186 SOC_SINGLE("Mono Playback Switch", MAX9867_IFC1B, 3, 1, 0),
187 };
188
189 /* Input mixer */
190 static const struct snd_kcontrol_new max9867_input_mixer_controls[] = {
191 SOC_DAPM_DOUBLE("Line Capture Switch", MAX9867_INPUTCONFIG, 7, 5, 1, 0),
192 SOC_DAPM_DOUBLE("Mic Capture Switch", MAX9867_INPUTCONFIG, 6, 4, 1, 0),
193 };
194
195 /* Output mixer */
196 static const struct snd_kcontrol_new max9867_output_mixer_controls[] = {
197 SOC_DAPM_DOUBLE_R("Line Bypass Switch",
198 MAX9867_LEFTLINELVL, MAX9867_RIGHTLINELVL, 6, 1, 1),
199 };
200
201 /* Sidetone mixer */
202 static const struct snd_kcontrol_new max9867_sidetone_mixer_controls[] = {
203 SOC_DAPM_DOUBLE("Sidetone Switch", MAX9867_SIDETONE, 6, 7, 1, 0),
204 };
205
206 /* Line out switch */
207 static const struct snd_kcontrol_new max9867_line_out_control =
208 SOC_DAPM_DOUBLE_R("Switch",
209 MAX9867_LEFTVOL, MAX9867_RIGHTVOL, 6, 1, 1);
210
211 /* DMIC mux */
212 static const char *const dmic_mux_text[] = {
213 "ADC", "DMIC"
214 };
215 static SOC_ENUM_SINGLE_DECL(left_dmic_mux_enum,
216 MAX9867_MICCONFIG, 5, dmic_mux_text);
217 static SOC_ENUM_SINGLE_DECL(right_dmic_mux_enum,
218 MAX9867_MICCONFIG, 4, dmic_mux_text);
219 static const struct snd_kcontrol_new max9867_left_dmic_mux =
220 SOC_DAPM_ENUM("DMICL Mux", left_dmic_mux_enum);
221 static const struct snd_kcontrol_new max9867_right_dmic_mux =
222 SOC_DAPM_ENUM("DMICR Mux", right_dmic_mux_enum);
223
224 static const struct snd_soc_dapm_widget max9867_dapm_widgets[] = {
225 SND_SOC_DAPM_INPUT("MICL"),
226 SND_SOC_DAPM_INPUT("MICR"),
227 SND_SOC_DAPM_INPUT("DMICL"),
228 SND_SOC_DAPM_INPUT("DMICR"),
229 SND_SOC_DAPM_INPUT("LINL"),
230 SND_SOC_DAPM_INPUT("LINR"),
231
232 SND_SOC_DAPM_PGA("Left Line Input", SND_SOC_NOPM, 0, 0, NULL, 0),
233 SND_SOC_DAPM_PGA("Right Line Input", SND_SOC_NOPM, 0, 0, NULL, 0),
234 SND_SOC_DAPM_MIXER_NAMED_CTL("Input Mixer", SND_SOC_NOPM, 0, 0,
235 max9867_input_mixer_controls,
236 ARRAY_SIZE(max9867_input_mixer_controls)),
237 SND_SOC_DAPM_MUX("DMICL Mux", SND_SOC_NOPM, 0, 0,
238 &max9867_left_dmic_mux),
239 SND_SOC_DAPM_MUX("DMICR Mux", SND_SOC_NOPM, 0, 0,
240 &max9867_right_dmic_mux),
241 SND_SOC_DAPM_ADC_E("ADCL", "HiFi Capture", SND_SOC_NOPM, 0, 0,
242 max9867_adc_dac_event,
243 SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
244 SND_SOC_DAPM_ADC_E("ADCR", "HiFi Capture", SND_SOC_NOPM, 0, 0,
245 max9867_adc_dac_event,
246 SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
247
248 SND_SOC_DAPM_MIXER("Digital", SND_SOC_NOPM, 0, 0,
249 max9867_sidetone_mixer_controls,
250 ARRAY_SIZE(max9867_sidetone_mixer_controls)),
251 SND_SOC_DAPM_MIXER_NAMED_CTL("Output Mixer", SND_SOC_NOPM, 0, 0,
252 max9867_output_mixer_controls,
253 ARRAY_SIZE(max9867_output_mixer_controls)),
254 SND_SOC_DAPM_DAC_E("DACL", "HiFi Playback", SND_SOC_NOPM, 0, 0,
255 max9867_adc_dac_event,
256 SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
257 SND_SOC_DAPM_DAC_E("DACR", "HiFi Playback", SND_SOC_NOPM, 0, 0,
258 max9867_adc_dac_event,
259 SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
260 SND_SOC_DAPM_SWITCH("Master Playback", SND_SOC_NOPM, 0, 0,
261 &max9867_line_out_control),
262 SND_SOC_DAPM_OUTPUT("LOUT"),
263 SND_SOC_DAPM_OUTPUT("ROUT"),
264 };
265
266 static const struct snd_soc_dapm_route max9867_audio_map[] = {
267 {"Left Line Input", NULL, "LINL"},
268 {"Right Line Input", NULL, "LINR"},
269 {"Input Mixer", "Mic Capture Switch", "MICL"},
270 {"Input Mixer", "Mic Capture Switch", "MICR"},
271 {"Input Mixer", "Line Capture Switch", "Left Line Input"},
272 {"Input Mixer", "Line Capture Switch", "Right Line Input"},
273 {"DMICL Mux", "DMIC", "DMICL"},
274 {"DMICR Mux", "DMIC", "DMICR"},
275 {"DMICL Mux", "ADC", "Input Mixer"},
276 {"DMICR Mux", "ADC", "Input Mixer"},
277 {"ADCL", NULL, "DMICL Mux"},
278 {"ADCR", NULL, "DMICR Mux"},
279
280 {"Digital", "Sidetone Switch", "ADCL"},
281 {"Digital", "Sidetone Switch", "ADCR"},
282 {"DACL", NULL, "Digital"},
283 {"DACR", NULL, "Digital"},
284
285 {"Output Mixer", "Line Bypass Switch", "Left Line Input"},
286 {"Output Mixer", "Line Bypass Switch", "Right Line Input"},
287 {"Output Mixer", NULL, "DACL"},
288 {"Output Mixer", NULL, "DACR"},
289 {"Master Playback", "Switch", "Output Mixer"},
290 {"LOUT", NULL, "Master Playback"},
291 {"ROUT", NULL, "Master Playback"},
292 };
293
294 static const unsigned int max9867_rates_44k1[] = {
295 11025, 22050, 44100,
296 };
297
298 static const struct snd_pcm_hw_constraint_list max9867_constraints_44k1 = {
299 .list = max9867_rates_44k1,
300 .count = ARRAY_SIZE(max9867_rates_44k1),
301 };
302
303 static const unsigned int max9867_rates_48k[] = {
304 8000, 16000, 32000, 48000,
305 };
306
307 static const struct snd_pcm_hw_constraint_list max9867_constraints_48k = {
308 .list = max9867_rates_48k,
309 .count = ARRAY_SIZE(max9867_rates_48k),
310 };
311
312 static int max9867_startup(struct snd_pcm_substream *substream,
313 struct snd_soc_dai *dai)
314 {
315 struct max9867_priv *max9867 =
316 snd_soc_component_get_drvdata(dai->component);
317
318 if (max9867->constraints)
319 snd_pcm_hw_constraint_list(substream->runtime, 0,
320 SNDRV_PCM_HW_PARAM_RATE, max9867->constraints);
321
322 return 0;
323 }
324
325 static int max9867_dai_hw_params(struct snd_pcm_substream *substream,
326 struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
327 {
328 int value, freq = 0;
329 unsigned long int rate, ratio;
330 struct snd_soc_component *component = dai->component;
331 struct max9867_priv *max9867 = snd_soc_component_get_drvdata(component);
332 unsigned int ni = DIV_ROUND_CLOSEST_ULL(96ULL * 0x10000 * params_rate(params),
333 max9867->pclk);
334
335 /* set up the ni value */
336 regmap_update_bits(max9867->regmap, MAX9867_AUDIOCLKHIGH,
337 MAX9867_NI_HIGH_MASK, (0xFF00 & ni) >> 8);
338 regmap_update_bits(max9867->regmap, MAX9867_AUDIOCLKLOW,
339 MAX9867_NI_LOW_MASK, 0x00FF & ni);
340 if (max9867->provider) {
341 if (max9867->dsp_a) {
342 value = MAX9867_IFC1B_48X;
343 } else {
344 rate = params_rate(params) * 2 * params_width(params);
345 ratio = max9867->pclk / rate;
346 switch (params_width(params)) {
347 case 8:
348 case 16:
349 switch (ratio) {
350 case 2:
351 value = MAX9867_IFC1B_PCLK_2;
352 break;
353 case 4:
354 value = MAX9867_IFC1B_PCLK_4;
355 break;
356 case 8:
357 value = MAX9867_IFC1B_PCLK_8;
358 break;
359 case 16:
360 value = MAX9867_IFC1B_PCLK_16;
361 break;
362 default:
363 return -EINVAL;
364 }
365 break;
366 case 24:
367 value = MAX9867_IFC1B_48X;
368 break;
369 case 32:
370 value = MAX9867_IFC1B_64X;
371 break;
372 default:
373 return -EINVAL;
374 }
375 }
376 regmap_update_bits(max9867->regmap, MAX9867_IFC1B,
377 MAX9867_IFC1B_BCLK_MASK, value);
378
379 /* Exact integer mode available for 8kHz and 16kHz sample rates
380 * and certain PCLK (prescaled MCLK) values.
381 */
382 if (params_rate(params) == 8000 ||
383 params_rate(params) == 16000) {
384 switch (max9867->pclk) {
385 case 12000000:
386 freq = 0x08;
387 break;
388 case 13000000:
389 freq = 0x0A;
390 break;
391 case 16000000:
392 freq = 0x0C;
393 break;
394 case 19200000:
395 freq = 0x0E;
396 break;
397 }
398 }
399 if (freq && params_rate(params) == 16000)
400 freq++;
401
402 /* If exact integer mode not available, the freq value
403 * remains zero, i.e. normal mode is used.
404 */
405 regmap_update_bits(max9867->regmap, MAX9867_SYSCLK,
406 MAX9867_FREQ_MASK, freq);
407 } else {
408 /*
409 * digital pll locks on to any externally supplied LRCLK signal
410 * and also enable rapid lock mode.
411 */
412 regmap_update_bits(max9867->regmap, MAX9867_AUDIOCLKLOW,
413 MAX9867_RAPID_LOCK, MAX9867_RAPID_LOCK);
414 regmap_update_bits(max9867->regmap, MAX9867_AUDIOCLKHIGH,
415 MAX9867_PLL, MAX9867_PLL);
416 }
417 return 0;
418 }
419
420 static int max9867_mute(struct snd_soc_dai *dai, int mute, int direction)
421 {
422 struct snd_soc_component *component = dai->component;
423 struct max9867_priv *max9867 = snd_soc_component_get_drvdata(component);
424
425 return regmap_update_bits(max9867->regmap, MAX9867_DACLEVEL,
426 1 << 6, !!mute << 6);
427 }
428
429 static int max9867_set_dai_sysclk(struct snd_soc_dai *codec_dai,
430 int clk_id, unsigned int freq, int dir)
431 {
432 struct snd_soc_component *component = codec_dai->component;
433 struct max9867_priv *max9867 = snd_soc_component_get_drvdata(component);
434 int value = 0;
435
436 /* Set the prescaler based on the master clock frequency*/
437 if (freq >= 10000000 && freq <= 20000000) {
438 value |= MAX9867_PSCLK_10_20;
439 max9867->pclk = freq;
440 } else if (freq >= 20000000 && freq <= 40000000) {
441 value |= MAX9867_PSCLK_20_40;
442 max9867->pclk = freq / 2;
443 } else if (freq >= 40000000 && freq <= 60000000) {
444 value |= MAX9867_PSCLK_40_60;
445 max9867->pclk = freq / 4;
446 } else {
447 dev_err(component->dev,
448 "Invalid clock frequency %uHz (required 10-60MHz)\n",
449 freq);
450 return -EINVAL;
451 }
452 if (freq % 48000 == 0)
453 max9867->constraints = &max9867_constraints_48k;
454 else if (freq % 44100 == 0)
455 max9867->constraints = &max9867_constraints_44k1;
456 else
457 dev_warn(component->dev,
458 "Unable to set exact rate with %uHz clock frequency\n",
459 freq);
460 max9867->sysclk = freq;
461 value = value << MAX9867_PSCLK_SHIFT;
462 regmap_update_bits(max9867->regmap, MAX9867_SYSCLK,
463 MAX9867_PSCLK_MASK, value);
464 return 0;
465 }
466
467 static int max9867_dai_set_fmt(struct snd_soc_dai *codec_dai,
468 unsigned int fmt)
469 {
470 struct snd_soc_component *component = codec_dai->component;
471 struct max9867_priv *max9867 = snd_soc_component_get_drvdata(component);
472 u8 iface1A, iface1B;
473
474 switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) {
475 case SND_SOC_DAIFMT_CBP_CFP:
476 max9867->provider = true;
477 iface1A = MAX9867_MASTER;
478 iface1B = MAX9867_IFC1B_48X;
479 break;
480 case SND_SOC_DAIFMT_CBC_CFC:
481 max9867->provider = false;
482 iface1A = iface1B = 0;
483 break;
484 default:
485 return -EINVAL;
486 }
487
488 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
489 case SND_SOC_DAIFMT_I2S:
490 max9867->dsp_a = false;
491 iface1A |= MAX9867_I2S_DLY;
492 break;
493 case SND_SOC_DAIFMT_DSP_A:
494 max9867->dsp_a = true;
495 iface1A |= MAX9867_TDM_MODE | MAX9867_SDOUT_HIZ;
496 break;
497 default:
498 return -EINVAL;
499 }
500
501 /* Clock inversion bits, BCI and WCI */
502 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
503 case SND_SOC_DAIFMT_NB_NF:
504 break;
505 case SND_SOC_DAIFMT_IB_IF:
506 iface1A |= MAX9867_WCI_MODE | MAX9867_BCI_MODE;
507 break;
508 case SND_SOC_DAIFMT_IB_NF:
509 iface1A |= MAX9867_BCI_MODE;
510 break;
511 case SND_SOC_DAIFMT_NB_IF:
512 iface1A |= MAX9867_WCI_MODE;
513 break;
514 default:
515 return -EINVAL;
516 }
517
518 regmap_write(max9867->regmap, MAX9867_IFC1A, iface1A);
519 regmap_update_bits(max9867->regmap, MAX9867_IFC1B,
520 MAX9867_IFC1B_BCLK_MASK, iface1B);
521
522 return 0;
523 }
524
525 static const struct snd_soc_dai_ops max9867_dai_ops = {
526 .set_sysclk = max9867_set_dai_sysclk,
527 .set_fmt = max9867_dai_set_fmt,
528 .mute_stream = max9867_mute,
529 .startup = max9867_startup,
530 .hw_params = max9867_dai_hw_params,
531 .no_capture_mute = 1,
532 };
533
534 static struct snd_soc_dai_driver max9867_dai[] = {
535 {
536 .name = "max9867-aif1",
537 .playback = {
538 .stream_name = "HiFi Playback",
539 .channels_min = 2,
540 .channels_max = 2,
541 .rates = SNDRV_PCM_RATE_8000_48000,
542 .formats = SNDRV_PCM_FMTBIT_S16_LE,
543 },
544 .capture = {
545 .stream_name = "HiFi Capture",
546 .channels_min = 2,
547 .channels_max = 2,
548 .rates = SNDRV_PCM_RATE_8000_48000,
549 .formats = SNDRV_PCM_FMTBIT_S16_LE,
550 },
551 .ops = &max9867_dai_ops,
552 .symmetric_rate = 1,
553 }
554 };
555
556 #ifdef CONFIG_PM
557 static int max9867_suspend(struct snd_soc_component *component)
558 {
559 snd_soc_component_force_bias_level(component, SND_SOC_BIAS_OFF);
560
561 return 0;
562 }
563
564 static int max9867_resume(struct snd_soc_component *component)
565 {
566 snd_soc_component_force_bias_level(component, SND_SOC_BIAS_STANDBY);
567
568 return 0;
569 }
570 #else
571 #define max9867_suspend NULL
572 #define max9867_resume NULL
573 #endif
574
575 static int max9867_set_bias_level(struct snd_soc_component *component,
576 enum snd_soc_bias_level level)
577 {
578 int err;
579 struct max9867_priv *max9867 = snd_soc_component_get_drvdata(component);
580
581 switch (level) {
582 case SND_SOC_BIAS_ON:
583 err = clk_prepare_enable(max9867->mclk);
584 if (err)
585 return err;
586 break;
587 case SND_SOC_BIAS_STANDBY:
588 if (snd_soc_component_get_bias_level(component) == SND_SOC_BIAS_OFF) {
589 err = regcache_sync(max9867->regmap);
590 if (err)
591 return err;
592
593 err = regmap_write(max9867->regmap,
594 MAX9867_PWRMAN, 0xff);
595 if (err)
596 return err;
597 }
598 break;
599 case SND_SOC_BIAS_OFF:
600 err = regmap_write(max9867->regmap, MAX9867_PWRMAN, 0);
601 if (err)
602 return err;
603
604 regcache_mark_dirty(max9867->regmap);
605 clk_disable_unprepare(max9867->mclk);
606 break;
607 default:
608 break;
609 }
610
611 return 0;
612 }
613
614 static const struct snd_soc_component_driver max9867_component = {
615 .controls = max9867_snd_controls,
616 .num_controls = ARRAY_SIZE(max9867_snd_controls),
617 .dapm_routes = max9867_audio_map,
618 .num_dapm_routes = ARRAY_SIZE(max9867_audio_map),
619 .dapm_widgets = max9867_dapm_widgets,
620 .num_dapm_widgets = ARRAY_SIZE(max9867_dapm_widgets),
621 .suspend = max9867_suspend,
622 .resume = max9867_resume,
623 .set_bias_level = max9867_set_bias_level,
624 .idle_bias_on = 1,
625 .use_pmdown_time = 1,
626 .endianness = 1,
627 };
628
629 static bool max9867_volatile_register(struct device *dev, unsigned int reg)
630 {
631 switch (reg) {
632 case MAX9867_STATUS:
633 case MAX9867_JACKSTATUS:
634 case MAX9867_AUXHIGH:
635 case MAX9867_AUXLOW:
636 return true;
637 default:
638 return false;
639 }
640 }
641
642 static const struct regmap_config max9867_regmap = {
643 .reg_bits = 8,
644 .val_bits = 8,
645 .max_register = MAX9867_REVISION,
646 .volatile_reg = max9867_volatile_register,
647 .cache_type = REGCACHE_RBTREE,
648 };
649
650 static int max9867_i2c_probe(struct i2c_client *i2c)
651 {
652 struct max9867_priv *max9867;
653 int ret, reg;
654
655 max9867 = devm_kzalloc(&i2c->dev, sizeof(*max9867), GFP_KERNEL);
656 if (!max9867)
657 return -ENOMEM;
658
659 i2c_set_clientdata(i2c, max9867);
660 max9867->regmap = devm_regmap_init_i2c(i2c, &max9867_regmap);
661 if (IS_ERR(max9867->regmap)) {
662 ret = PTR_ERR(max9867->regmap);
663 dev_err(&i2c->dev, "Failed to allocate regmap: %d\n", ret);
664 return ret;
665 }
666 ret = regmap_read(max9867->regmap, MAX9867_REVISION, ®);
667 if (ret < 0) {
668 dev_err(&i2c->dev, "Failed to read: %d\n", ret);
669 return ret;
670 }
671 dev_info(&i2c->dev, "device revision: %x\n", reg);
672 ret = devm_snd_soc_register_component(&i2c->dev, &max9867_component,
673 max9867_dai, ARRAY_SIZE(max9867_dai));
674 if (ret < 0) {
675 dev_err(&i2c->dev, "Failed to register component: %d\n", ret);
676 return ret;
677 }
678
679 max9867->mclk = devm_clk_get(&i2c->dev, NULL);
680 if (IS_ERR(max9867->mclk))
681 return PTR_ERR(max9867->mclk);
682
683 return 0;
684 }
685
686 static const struct i2c_device_id max9867_i2c_id[] = {
687 { "max9867" },
688 { }
689 };
690 MODULE_DEVICE_TABLE(i2c, max9867_i2c_id);
691
692 #ifdef CONFIG_OF
693 static const struct of_device_id max9867_of_match[] = {
694 { .compatible = "maxim,max9867", },
695 { }
696 };
697 MODULE_DEVICE_TABLE(of, max9867_of_match);
698 #endif
699
700 static struct i2c_driver max9867_i2c_driver = {
701 .driver = {
702 .name = "max9867",
703 .of_match_table = of_match_ptr(max9867_of_match),
704 },
705 .probe = max9867_i2c_probe,
706 .id_table = max9867_i2c_id,
707 };
708
709 module_i2c_driver(max9867_i2c_driver);
710
711 MODULE_AUTHOR("Ladislav Michl <ladis@linux-mips.org>");
712 MODULE_DESCRIPTION("ASoC MAX9867 driver");
713 MODULE_LICENSE("GPL");
714
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.