1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * CS4271 ASoC codec driver
4 *
5 * Copyright (c) 2010 Alexander Sverdlin <subaparts@yandex.ru>
6 *
7 * This driver support CS4271 codec being master or slave, working
8 * in control port mode, connected either via SPI or I2C.
9 * The data format accepted is I2S or left-justified.
10 * DAPM support not implemented.
11 */
12
13 #include <linux/module.h>
14 #include <linux/slab.h>
15 #include <linux/delay.h>
16 #include <linux/gpio/consumer.h>
17 #include <linux/of.h>
18 #include <linux/regulator/consumer.h>
19 #include <sound/pcm.h>
20 #include <sound/soc.h>
21 #include <sound/tlv.h>
22 #include <sound/cs4271.h>
23 #include "cs4271.h"
24
25 #define CS4271_PCM_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | \
26 SNDRV_PCM_FMTBIT_S24_LE | \
27 SNDRV_PCM_FMTBIT_S32_LE)
28 #define CS4271_PCM_RATES SNDRV_PCM_RATE_8000_192000
29
30 /*
31 * CS4271 registers
32 */
33 #define CS4271_MODE1 0x01 /* Mode Control 1 */
34 #define CS4271_DACCTL 0x02 /* DAC Control */
35 #define CS4271_DACVOL 0x03 /* DAC Volume & Mixing Control */
36 #define CS4271_VOLA 0x04 /* DAC Channel A Volume Control */
37 #define CS4271_VOLB 0x05 /* DAC Channel B Volume Control */
38 #define CS4271_ADCCTL 0x06 /* ADC Control */
39 #define CS4271_MODE2 0x07 /* Mode Control 2 */
40 #define CS4271_CHIPID 0x08 /* Chip ID */
41
42 #define CS4271_FIRSTREG CS4271_MODE1
43 #define CS4271_LASTREG CS4271_MODE2
44 #define CS4271_NR_REGS ((CS4271_LASTREG & 0xFF) + 1)
45
46 /* Bit masks for the CS4271 registers */
47 #define CS4271_MODE1_MODE_MASK 0xC0
48 #define CS4271_MODE1_MODE_1X 0x00
49 #define CS4271_MODE1_MODE_2X 0x80
50 #define CS4271_MODE1_MODE_4X 0xC0
51
52 #define CS4271_MODE1_DIV_MASK 0x30
53 #define CS4271_MODE1_DIV_1 0x00
54 #define CS4271_MODE1_DIV_15 0x10
55 #define CS4271_MODE1_DIV_2 0x20
56 #define CS4271_MODE1_DIV_3 0x30
57
58 #define CS4271_MODE1_MASTER 0x08
59
60 #define CS4271_MODE1_DAC_DIF_MASK 0x07
61 #define CS4271_MODE1_DAC_DIF_LJ 0x00
62 #define CS4271_MODE1_DAC_DIF_I2S 0x01
63 #define CS4271_MODE1_DAC_DIF_RJ16 0x02
64 #define CS4271_MODE1_DAC_DIF_RJ24 0x03
65 #define CS4271_MODE1_DAC_DIF_RJ20 0x04
66 #define CS4271_MODE1_DAC_DIF_RJ18 0x05
67
68 #define CS4271_DACCTL_AMUTE 0x80
69 #define CS4271_DACCTL_IF_SLOW 0x40
70
71 #define CS4271_DACCTL_DEM_MASK 0x30
72 #define CS4271_DACCTL_DEM_DIS 0x00
73 #define CS4271_DACCTL_DEM_441 0x10
74 #define CS4271_DACCTL_DEM_48 0x20
75 #define CS4271_DACCTL_DEM_32 0x30
76
77 #define CS4271_DACCTL_SVRU 0x08
78 #define CS4271_DACCTL_SRD 0x04
79 #define CS4271_DACCTL_INVA 0x02
80 #define CS4271_DACCTL_INVB 0x01
81
82 #define CS4271_DACVOL_BEQUA 0x40
83 #define CS4271_DACVOL_SOFT 0x20
84 #define CS4271_DACVOL_ZEROC 0x10
85
86 #define CS4271_DACVOL_ATAPI_MASK 0x0F
87 #define CS4271_DACVOL_ATAPI_M_M 0x00
88 #define CS4271_DACVOL_ATAPI_M_BR 0x01
89 #define CS4271_DACVOL_ATAPI_M_BL 0x02
90 #define CS4271_DACVOL_ATAPI_M_BLR2 0x03
91 #define CS4271_DACVOL_ATAPI_AR_M 0x04
92 #define CS4271_DACVOL_ATAPI_AR_BR 0x05
93 #define CS4271_DACVOL_ATAPI_AR_BL 0x06
94 #define CS4271_DACVOL_ATAPI_AR_BLR2 0x07
95 #define CS4271_DACVOL_ATAPI_AL_M 0x08
96 #define CS4271_DACVOL_ATAPI_AL_BR 0x09
97 #define CS4271_DACVOL_ATAPI_AL_BL 0x0A
98 #define CS4271_DACVOL_ATAPI_AL_BLR2 0x0B
99 #define CS4271_DACVOL_ATAPI_ALR2_M 0x0C
100 #define CS4271_DACVOL_ATAPI_ALR2_BR 0x0D
101 #define CS4271_DACVOL_ATAPI_ALR2_BL 0x0E
102 #define CS4271_DACVOL_ATAPI_ALR2_BLR2 0x0F
103
104 #define CS4271_VOLA_MUTE 0x80
105 #define CS4271_VOLA_VOL_MASK 0x7F
106 #define CS4271_VOLB_MUTE 0x80
107 #define CS4271_VOLB_VOL_MASK 0x7F
108
109 #define CS4271_ADCCTL_DITHER16 0x20
110
111 #define CS4271_ADCCTL_ADC_DIF_MASK 0x10
112 #define CS4271_ADCCTL_ADC_DIF_LJ 0x00
113 #define CS4271_ADCCTL_ADC_DIF_I2S 0x10
114
115 #define CS4271_ADCCTL_MUTEA 0x08
116 #define CS4271_ADCCTL_MUTEB 0x04
117 #define CS4271_ADCCTL_HPFDA 0x02
118 #define CS4271_ADCCTL_HPFDB 0x01
119
120 #define CS4271_MODE2_LOOP 0x10
121 #define CS4271_MODE2_MUTECAEQUB 0x08
122 #define CS4271_MODE2_FREEZE 0x04
123 #define CS4271_MODE2_CPEN 0x02
124 #define CS4271_MODE2_PDN 0x01
125
126 #define CS4271_CHIPID_PART_MASK 0xF0
127 #define CS4271_CHIPID_REV_MASK 0x0F
128
129 /*
130 * Default CS4271 power-up configuration
131 * Array contains non-existing in hw register at address 0
132 * Array do not include Chip ID, as codec driver does not use
133 * registers read operations at all
134 */
135 static const struct reg_default cs4271_reg_defaults[] = {
136 { CS4271_MODE1, 0, },
137 { CS4271_DACCTL, CS4271_DACCTL_AMUTE, },
138 { CS4271_DACVOL, CS4271_DACVOL_SOFT | CS4271_DACVOL_ATAPI_AL_BR, },
139 { CS4271_VOLA, 0, },
140 { CS4271_VOLB, 0, },
141 { CS4271_ADCCTL, 0, },
142 { CS4271_MODE2, 0, },
143 };
144
cs4271_volatile_reg(struct device * dev,unsigned int reg)145 static bool cs4271_volatile_reg(struct device *dev, unsigned int reg)
146 {
147 return reg == CS4271_CHIPID;
148 }
149
150 static const char * const supply_names[] = {
151 "vd", "vl", "va"
152 };
153
154 struct cs4271_private {
155 unsigned int mclk;
156 bool master;
157 bool deemph;
158 struct regmap *regmap;
159 /* Current sample rate for de-emphasis control */
160 int rate;
161 /* GPIO driving Reset pin, if any */
162 struct gpio_desc *reset;
163 /* enable soft reset workaround */
164 bool enable_soft_reset;
165 struct regulator_bulk_data supplies[ARRAY_SIZE(supply_names)];
166 };
167
168 static const struct snd_soc_dapm_widget cs4271_dapm_widgets[] = {
169 SND_SOC_DAPM_INPUT("AINA"),
170 SND_SOC_DAPM_INPUT("AINB"),
171
172 SND_SOC_DAPM_OUTPUT("AOUTA+"),
173 SND_SOC_DAPM_OUTPUT("AOUTA-"),
174 SND_SOC_DAPM_OUTPUT("AOUTB+"),
175 SND_SOC_DAPM_OUTPUT("AOUTB-"),
176 };
177
178 static const struct snd_soc_dapm_route cs4271_dapm_routes[] = {
179 { "Capture", NULL, "AINA" },
180 { "Capture", NULL, "AINB" },
181
182 { "AOUTA+", NULL, "Playback" },
183 { "AOUTA-", NULL, "Playback" },
184 { "AOUTB+", NULL, "Playback" },
185 { "AOUTB-", NULL, "Playback" },
186 };
187
188 /*
189 * @freq is the desired MCLK rate
190 * MCLK rate should (c) be the sample rate, multiplied by one of the
191 * ratios listed in cs4271_mclk_fs_ratios table
192 */
cs4271_set_dai_sysclk(struct snd_soc_dai * codec_dai,int clk_id,unsigned int freq,int dir)193 static int cs4271_set_dai_sysclk(struct snd_soc_dai *codec_dai,
194 int clk_id, unsigned int freq, int dir)
195 {
196 struct snd_soc_component *component = codec_dai->component;
197 struct cs4271_private *cs4271 = snd_soc_component_get_drvdata(component);
198
199 cs4271->mclk = freq;
200 return 0;
201 }
202
cs4271_set_dai_fmt(struct snd_soc_dai * codec_dai,unsigned int format)203 static int cs4271_set_dai_fmt(struct snd_soc_dai *codec_dai,
204 unsigned int format)
205 {
206 struct snd_soc_component *component = codec_dai->component;
207 struct cs4271_private *cs4271 = snd_soc_component_get_drvdata(component);
208 unsigned int val = 0;
209 int ret;
210
211 switch (format & SND_SOC_DAIFMT_MASTER_MASK) {
212 case SND_SOC_DAIFMT_CBS_CFS:
213 cs4271->master = false;
214 break;
215 case SND_SOC_DAIFMT_CBM_CFM:
216 cs4271->master = true;
217 val |= CS4271_MODE1_MASTER;
218 break;
219 default:
220 dev_err(component->dev, "Invalid DAI format\n");
221 return -EINVAL;
222 }
223
224 switch (format & SND_SOC_DAIFMT_FORMAT_MASK) {
225 case SND_SOC_DAIFMT_LEFT_J:
226 val |= CS4271_MODE1_DAC_DIF_LJ;
227 ret = regmap_update_bits(cs4271->regmap, CS4271_ADCCTL,
228 CS4271_ADCCTL_ADC_DIF_MASK, CS4271_ADCCTL_ADC_DIF_LJ);
229 if (ret < 0)
230 return ret;
231 break;
232 case SND_SOC_DAIFMT_I2S:
233 val |= CS4271_MODE1_DAC_DIF_I2S;
234 ret = regmap_update_bits(cs4271->regmap, CS4271_ADCCTL,
235 CS4271_ADCCTL_ADC_DIF_MASK, CS4271_ADCCTL_ADC_DIF_I2S);
236 if (ret < 0)
237 return ret;
238 break;
239 default:
240 dev_err(component->dev, "Invalid DAI format\n");
241 return -EINVAL;
242 }
243
244 ret = regmap_update_bits(cs4271->regmap, CS4271_MODE1,
245 CS4271_MODE1_DAC_DIF_MASK | CS4271_MODE1_MASTER, val);
246 if (ret < 0)
247 return ret;
248 return 0;
249 }
250
251 static int cs4271_deemph[] = {0, 44100, 48000, 32000};
252
cs4271_set_deemph(struct snd_soc_component * component)253 static int cs4271_set_deemph(struct snd_soc_component *component)
254 {
255 struct cs4271_private *cs4271 = snd_soc_component_get_drvdata(component);
256 int i, ret;
257 int val = CS4271_DACCTL_DEM_DIS;
258
259 if (cs4271->deemph) {
260 /* Find closest de-emphasis freq */
261 val = 1;
262 for (i = 2; i < ARRAY_SIZE(cs4271_deemph); i++)
263 if (abs(cs4271_deemph[i] - cs4271->rate) <
264 abs(cs4271_deemph[val] - cs4271->rate))
265 val = i;
266 val <<= 4;
267 }
268
269 ret = regmap_update_bits(cs4271->regmap, CS4271_DACCTL,
270 CS4271_DACCTL_DEM_MASK, val);
271 if (ret < 0)
272 return ret;
273 return 0;
274 }
275
cs4271_get_deemph(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)276 static int cs4271_get_deemph(struct snd_kcontrol *kcontrol,
277 struct snd_ctl_elem_value *ucontrol)
278 {
279 struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
280 struct cs4271_private *cs4271 = snd_soc_component_get_drvdata(component);
281
282 ucontrol->value.integer.value[0] = cs4271->deemph;
283 return 0;
284 }
285
cs4271_put_deemph(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)286 static int cs4271_put_deemph(struct snd_kcontrol *kcontrol,
287 struct snd_ctl_elem_value *ucontrol)
288 {
289 struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
290 struct cs4271_private *cs4271 = snd_soc_component_get_drvdata(component);
291
292 cs4271->deemph = ucontrol->value.integer.value[0];
293 return cs4271_set_deemph(component);
294 }
295
296 struct cs4271_clk_cfg {
297 bool master; /* codec mode */
298 u8 speed_mode; /* codec speed mode: 1x, 2x, 4x */
299 unsigned short ratio; /* MCLK / sample rate */
300 u8 ratio_mask; /* ratio bit mask for Master mode */
301 };
302
303 static struct cs4271_clk_cfg cs4271_clk_tab[] = {
304 {1, CS4271_MODE1_MODE_1X, 256, CS4271_MODE1_DIV_1},
305 {1, CS4271_MODE1_MODE_1X, 384, CS4271_MODE1_DIV_15},
306 {1, CS4271_MODE1_MODE_1X, 512, CS4271_MODE1_DIV_2},
307 {1, CS4271_MODE1_MODE_1X, 768, CS4271_MODE1_DIV_3},
308 {1, CS4271_MODE1_MODE_2X, 128, CS4271_MODE1_DIV_1},
309 {1, CS4271_MODE1_MODE_2X, 192, CS4271_MODE1_DIV_15},
310 {1, CS4271_MODE1_MODE_2X, 256, CS4271_MODE1_DIV_2},
311 {1, CS4271_MODE1_MODE_2X, 384, CS4271_MODE1_DIV_3},
312 {1, CS4271_MODE1_MODE_4X, 64, CS4271_MODE1_DIV_1},
313 {1, CS4271_MODE1_MODE_4X, 96, CS4271_MODE1_DIV_15},
314 {1, CS4271_MODE1_MODE_4X, 128, CS4271_MODE1_DIV_2},
315 {1, CS4271_MODE1_MODE_4X, 192, CS4271_MODE1_DIV_3},
316 {0, CS4271_MODE1_MODE_1X, 256, CS4271_MODE1_DIV_1},
317 {0, CS4271_MODE1_MODE_1X, 384, CS4271_MODE1_DIV_1},
318 {0, CS4271_MODE1_MODE_1X, 512, CS4271_MODE1_DIV_1},
319 {0, CS4271_MODE1_MODE_1X, 768, CS4271_MODE1_DIV_2},
320 {0, CS4271_MODE1_MODE_1X, 1024, CS4271_MODE1_DIV_2},
321 {0, CS4271_MODE1_MODE_2X, 128, CS4271_MODE1_DIV_1},
322 {0, CS4271_MODE1_MODE_2X, 192, CS4271_MODE1_DIV_1},
323 {0, CS4271_MODE1_MODE_2X, 256, CS4271_MODE1_DIV_1},
324 {0, CS4271_MODE1_MODE_2X, 384, CS4271_MODE1_DIV_2},
325 {0, CS4271_MODE1_MODE_2X, 512, CS4271_MODE1_DIV_2},
326 {0, CS4271_MODE1_MODE_4X, 64, CS4271_MODE1_DIV_1},
327 {0, CS4271_MODE1_MODE_4X, 96, CS4271_MODE1_DIV_1},
328 {0, CS4271_MODE1_MODE_4X, 128, CS4271_MODE1_DIV_1},
329 {0, CS4271_MODE1_MODE_4X, 192, CS4271_MODE1_DIV_2},
330 {0, CS4271_MODE1_MODE_4X, 256, CS4271_MODE1_DIV_2},
331 };
332
333 #define CS4271_NR_RATIOS ARRAY_SIZE(cs4271_clk_tab)
334
cs4271_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params,struct snd_soc_dai * dai)335 static int cs4271_hw_params(struct snd_pcm_substream *substream,
336 struct snd_pcm_hw_params *params,
337 struct snd_soc_dai *dai)
338 {
339 struct snd_soc_component *component = dai->component;
340 struct cs4271_private *cs4271 = snd_soc_component_get_drvdata(component);
341 int i, ret;
342 unsigned int ratio, val;
343
344 if (cs4271->enable_soft_reset) {
345 /*
346 * Put the codec in soft reset and back again in case it's not
347 * currently streaming data. This way of bringing the codec in
348 * sync to the current clocks is not explicitly documented in
349 * the data sheet, but it seems to work fine, and in contrast
350 * to a read hardware reset, we don't have to sync back all
351 * registers every time.
352 */
353
354 if ((substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
355 !snd_soc_dai_stream_active(dai, SNDRV_PCM_STREAM_CAPTURE)) ||
356 (substream->stream == SNDRV_PCM_STREAM_CAPTURE &&
357 !snd_soc_dai_stream_active(dai, SNDRV_PCM_STREAM_PLAYBACK))) {
358 ret = regmap_update_bits(cs4271->regmap, CS4271_MODE2,
359 CS4271_MODE2_PDN,
360 CS4271_MODE2_PDN);
361 if (ret < 0)
362 return ret;
363
364 ret = regmap_update_bits(cs4271->regmap, CS4271_MODE2,
365 CS4271_MODE2_PDN, 0);
366 if (ret < 0)
367 return ret;
368 }
369 }
370
371 cs4271->rate = params_rate(params);
372
373 /* Configure DAC */
374 if (cs4271->rate < 50000)
375 val = CS4271_MODE1_MODE_1X;
376 else if (cs4271->rate < 100000)
377 val = CS4271_MODE1_MODE_2X;
378 else
379 val = CS4271_MODE1_MODE_4X;
380
381 ratio = cs4271->mclk / cs4271->rate;
382 for (i = 0; i < CS4271_NR_RATIOS; i++)
383 if ((cs4271_clk_tab[i].master == cs4271->master) &&
384 (cs4271_clk_tab[i].speed_mode == val) &&
385 (cs4271_clk_tab[i].ratio == ratio))
386 break;
387
388 if (i == CS4271_NR_RATIOS) {
389 dev_err(component->dev, "Invalid sample rate\n");
390 return -EINVAL;
391 }
392
393 val |= cs4271_clk_tab[i].ratio_mask;
394
395 ret = regmap_update_bits(cs4271->regmap, CS4271_MODE1,
396 CS4271_MODE1_MODE_MASK | CS4271_MODE1_DIV_MASK, val);
397 if (ret < 0)
398 return ret;
399
400 return cs4271_set_deemph(component);
401 }
402
cs4271_mute_stream(struct snd_soc_dai * dai,int mute,int stream)403 static int cs4271_mute_stream(struct snd_soc_dai *dai, int mute, int stream)
404 {
405 struct snd_soc_component *component = dai->component;
406 struct cs4271_private *cs4271 = snd_soc_component_get_drvdata(component);
407 int ret;
408 int val_a = 0;
409 int val_b = 0;
410
411 if (stream != SNDRV_PCM_STREAM_PLAYBACK)
412 return 0;
413
414 if (mute) {
415 val_a = CS4271_VOLA_MUTE;
416 val_b = CS4271_VOLB_MUTE;
417 }
418
419 ret = regmap_update_bits(cs4271->regmap, CS4271_VOLA,
420 CS4271_VOLA_MUTE, val_a);
421 if (ret < 0)
422 return ret;
423
424 ret = regmap_update_bits(cs4271->regmap, CS4271_VOLB,
425 CS4271_VOLB_MUTE, val_b);
426 if (ret < 0)
427 return ret;
428
429 return 0;
430 }
431
432 /* CS4271 controls */
433 static DECLARE_TLV_DB_SCALE(cs4271_dac_tlv, -12700, 100, 0);
434
435 static const struct snd_kcontrol_new cs4271_snd_controls[] = {
436 SOC_DOUBLE_R_TLV("Master Playback Volume", CS4271_VOLA, CS4271_VOLB,
437 0, 0x7F, 1, cs4271_dac_tlv),
438 SOC_SINGLE("Digital Loopback Switch", CS4271_MODE2, 4, 1, 0),
439 SOC_SINGLE("Soft Ramp Switch", CS4271_DACVOL, 5, 1, 0),
440 SOC_SINGLE("Zero Cross Switch", CS4271_DACVOL, 4, 1, 0),
441 SOC_SINGLE_BOOL_EXT("De-emphasis Switch", 0,
442 cs4271_get_deemph, cs4271_put_deemph),
443 SOC_SINGLE("Auto-Mute Switch", CS4271_DACCTL, 7, 1, 0),
444 SOC_SINGLE("Slow Roll Off Filter Switch", CS4271_DACCTL, 6, 1, 0),
445 SOC_SINGLE("Soft Volume Ramp-Up Switch", CS4271_DACCTL, 3, 1, 0),
446 SOC_SINGLE("Soft Ramp-Down Switch", CS4271_DACCTL, 2, 1, 0),
447 SOC_SINGLE("Left Channel Inversion Switch", CS4271_DACCTL, 1, 1, 0),
448 SOC_SINGLE("Right Channel Inversion Switch", CS4271_DACCTL, 0, 1, 0),
449 SOC_DOUBLE("Master Capture Switch", CS4271_ADCCTL, 3, 2, 1, 1),
450 SOC_SINGLE("Dither 16-Bit Data Switch", CS4271_ADCCTL, 5, 1, 0),
451 SOC_DOUBLE("High Pass Filter Switch", CS4271_ADCCTL, 1, 0, 1, 1),
452 SOC_DOUBLE_R("Master Playback Switch", CS4271_VOLA, CS4271_VOLB,
453 7, 1, 1),
454 };
455
456 static const struct snd_soc_dai_ops cs4271_dai_ops = {
457 .hw_params = cs4271_hw_params,
458 .set_sysclk = cs4271_set_dai_sysclk,
459 .set_fmt = cs4271_set_dai_fmt,
460 .mute_stream = cs4271_mute_stream,
461 };
462
463 static struct snd_soc_dai_driver cs4271_dai = {
464 .name = "cs4271-hifi",
465 .playback = {
466 .stream_name = "Playback",
467 .channels_min = 2,
468 .channels_max = 2,
469 .rates = CS4271_PCM_RATES,
470 .formats = CS4271_PCM_FORMATS,
471 },
472 .capture = {
473 .stream_name = "Capture",
474 .channels_min = 2,
475 .channels_max = 2,
476 .rates = CS4271_PCM_RATES,
477 .formats = CS4271_PCM_FORMATS,
478 },
479 .ops = &cs4271_dai_ops,
480 .symmetric_rate = 1,
481 };
482
cs4271_reset(struct snd_soc_component * component)483 static int cs4271_reset(struct snd_soc_component *component)
484 {
485 struct cs4271_private *cs4271 = snd_soc_component_get_drvdata(component);
486
487 gpiod_direction_output(cs4271->reset, 1);
488 mdelay(1);
489 gpiod_set_value(cs4271->reset, 0);
490 mdelay(1);
491
492 return 0;
493 }
494
495 #ifdef CONFIG_PM
cs4271_soc_suspend(struct snd_soc_component * component)496 static int cs4271_soc_suspend(struct snd_soc_component *component)
497 {
498 int ret;
499 struct cs4271_private *cs4271 = snd_soc_component_get_drvdata(component);
500
501 /* Set power-down bit */
502 ret = regmap_update_bits(cs4271->regmap, CS4271_MODE2,
503 CS4271_MODE2_PDN, CS4271_MODE2_PDN);
504 if (ret < 0)
505 return ret;
506
507 regcache_mark_dirty(cs4271->regmap);
508 regulator_bulk_disable(ARRAY_SIZE(cs4271->supplies), cs4271->supplies);
509
510 return 0;
511 }
512
cs4271_soc_resume(struct snd_soc_component * component)513 static int cs4271_soc_resume(struct snd_soc_component *component)
514 {
515 int ret;
516 struct cs4271_private *cs4271 = snd_soc_component_get_drvdata(component);
517
518 ret = regulator_bulk_enable(ARRAY_SIZE(cs4271->supplies),
519 cs4271->supplies);
520 if (ret < 0) {
521 dev_err(component->dev, "Failed to enable regulators: %d\n", ret);
522 return ret;
523 }
524
525 /* Do a proper reset after power up */
526 cs4271_reset(component);
527
528 /* Restore codec state */
529 ret = regcache_sync(cs4271->regmap);
530 if (ret < 0)
531 return ret;
532
533 /* then disable the power-down bit */
534 ret = regmap_update_bits(cs4271->regmap, CS4271_MODE2,
535 CS4271_MODE2_PDN, 0);
536 if (ret < 0)
537 return ret;
538
539 return 0;
540 }
541 #else
542 #define cs4271_soc_suspend NULL
543 #define cs4271_soc_resume NULL
544 #endif /* CONFIG_PM */
545
546 #ifdef CONFIG_OF
547 const struct of_device_id cs4271_dt_ids[] = {
548 { .compatible = "cirrus,cs4271", },
549 { }
550 };
551 MODULE_DEVICE_TABLE(of, cs4271_dt_ids);
552 EXPORT_SYMBOL_GPL(cs4271_dt_ids);
553 #endif
554
cs4271_component_probe(struct snd_soc_component * component)555 static int cs4271_component_probe(struct snd_soc_component *component)
556 {
557 struct cs4271_private *cs4271 = snd_soc_component_get_drvdata(component);
558 struct cs4271_platform_data *cs4271plat = component->dev->platform_data;
559 int ret;
560 bool amutec_eq_bmutec;
561
562 amutec_eq_bmutec = of_property_read_bool(component->dev->of_node,
563 "cirrus,amutec-eq-bmutec");
564 cs4271->enable_soft_reset = of_property_read_bool(component->dev->of_node,
565 "cirrus,enable-soft-reset");
566
567 ret = regulator_bulk_enable(ARRAY_SIZE(cs4271->supplies),
568 cs4271->supplies);
569 if (ret < 0) {
570 dev_err(component->dev, "Failed to enable regulators: %d\n", ret);
571 return ret;
572 }
573
574 if (cs4271plat) {
575 amutec_eq_bmutec = cs4271plat->amutec_eq_bmutec;
576 cs4271->enable_soft_reset = cs4271plat->enable_soft_reset;
577 }
578
579 /* Reset codec */
580 cs4271_reset(component);
581
582 ret = regcache_sync(cs4271->regmap);
583 if (ret < 0)
584 return ret;
585
586 ret = regmap_update_bits(cs4271->regmap, CS4271_MODE2,
587 CS4271_MODE2_PDN | CS4271_MODE2_CPEN,
588 CS4271_MODE2_PDN | CS4271_MODE2_CPEN);
589 if (ret < 0)
590 return ret;
591 ret = regmap_update_bits(cs4271->regmap, CS4271_MODE2,
592 CS4271_MODE2_PDN, 0);
593 if (ret < 0)
594 return ret;
595 /* Power-up sequence requires 85 uS */
596 udelay(85);
597
598 if (amutec_eq_bmutec)
599 regmap_update_bits(cs4271->regmap, CS4271_MODE2,
600 CS4271_MODE2_MUTECAEQUB,
601 CS4271_MODE2_MUTECAEQUB);
602
603 return 0;
604 }
605
cs4271_component_remove(struct snd_soc_component * component)606 static void cs4271_component_remove(struct snd_soc_component *component)
607 {
608 struct cs4271_private *cs4271 = snd_soc_component_get_drvdata(component);
609
610 /* Set codec to the reset state */
611 gpiod_set_value(cs4271->reset, 1);
612
613 regcache_mark_dirty(cs4271->regmap);
614 regulator_bulk_disable(ARRAY_SIZE(cs4271->supplies), cs4271->supplies);
615 };
616
617 static const struct snd_soc_component_driver soc_component_dev_cs4271 = {
618 .probe = cs4271_component_probe,
619 .remove = cs4271_component_remove,
620 .suspend = cs4271_soc_suspend,
621 .resume = cs4271_soc_resume,
622 .controls = cs4271_snd_controls,
623 .num_controls = ARRAY_SIZE(cs4271_snd_controls),
624 .dapm_widgets = cs4271_dapm_widgets,
625 .num_dapm_widgets = ARRAY_SIZE(cs4271_dapm_widgets),
626 .dapm_routes = cs4271_dapm_routes,
627 .num_dapm_routes = ARRAY_SIZE(cs4271_dapm_routes),
628 .idle_bias_on = 1,
629 .use_pmdown_time = 1,
630 .endianness = 1,
631 };
632
cs4271_common_probe(struct device * dev,struct cs4271_private ** c)633 static int cs4271_common_probe(struct device *dev,
634 struct cs4271_private **c)
635 {
636 struct cs4271_private *cs4271;
637 int i, ret;
638
639 cs4271 = devm_kzalloc(dev, sizeof(*cs4271), GFP_KERNEL);
640 if (!cs4271)
641 return -ENOMEM;
642
643 cs4271->reset = devm_gpiod_get_optional(dev, "reset", GPIOD_ASIS);
644 if (IS_ERR(cs4271->reset))
645 return dev_err_probe(dev, PTR_ERR(cs4271->reset),
646 "error retrieving RESET GPIO\n");
647 gpiod_set_consumer_name(cs4271->reset, "CS4271 Reset");
648
649 for (i = 0; i < ARRAY_SIZE(supply_names); i++)
650 cs4271->supplies[i].supply = supply_names[i];
651
652 ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(cs4271->supplies),
653 cs4271->supplies);
654
655 if (ret < 0) {
656 dev_err(dev, "Failed to get regulators: %d\n", ret);
657 return ret;
658 }
659
660 *c = cs4271;
661 return 0;
662 }
663
664 const struct regmap_config cs4271_regmap_config = {
665 .max_register = CS4271_LASTREG,
666
667 .reg_defaults = cs4271_reg_defaults,
668 .num_reg_defaults = ARRAY_SIZE(cs4271_reg_defaults),
669 .cache_type = REGCACHE_FLAT,
670 .val_bits = 8,
671 .volatile_reg = cs4271_volatile_reg,
672 };
673 EXPORT_SYMBOL_GPL(cs4271_regmap_config);
674
cs4271_probe(struct device * dev,struct regmap * regmap)675 int cs4271_probe(struct device *dev, struct regmap *regmap)
676 {
677 struct cs4271_private *cs4271;
678 int ret;
679
680 if (IS_ERR(regmap))
681 return PTR_ERR(regmap);
682
683 ret = cs4271_common_probe(dev, &cs4271);
684 if (ret < 0)
685 return ret;
686
687 dev_set_drvdata(dev, cs4271);
688 cs4271->regmap = regmap;
689
690 return devm_snd_soc_register_component(dev, &soc_component_dev_cs4271,
691 &cs4271_dai, 1);
692 }
693 EXPORT_SYMBOL_GPL(cs4271_probe);
694
695 MODULE_AUTHOR("Alexander Sverdlin <subaparts@yandex.ru>");
696 MODULE_DESCRIPTION("Cirrus Logic CS4271 ALSA SoC Codec Driver");
697 MODULE_LICENSE("GPL");
698