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