xref: /openbmc/linux/sound/soc/codecs/adau1977.c (revision a0a4cef8)
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * ADAU1977/ADAU1978/ADAU1979 driver
4  *
5  * Copyright 2014 Analog Devices Inc.
6  *  Author: Lars-Peter Clausen <lars@metafoo.de>
7  */
8 
9 #include <linux/delay.h>
10 #include <linux/device.h>
11 #include <linux/gpio/consumer.h>
12 #include <linux/i2c.h>
13 #include <linux/init.h>
14 #include <linux/module.h>
15 #include <linux/regmap.h>
16 #include <linux/regulator/consumer.h>
17 #include <linux/slab.h>
18 
19 #include <sound/core.h>
20 #include <sound/initval.h>
21 #include <sound/pcm.h>
22 #include <sound/pcm_params.h>
23 #include <sound/soc.h>
24 #include <sound/tlv.h>
25 
26 #include <dt-bindings/sound/adi,adau1977.h>
27 
28 #include "adau1977.h"
29 
30 #define ADAU1977_REG_POWER		0x00
31 #define ADAU1977_REG_PLL		0x01
32 #define ADAU1977_REG_BOOST		0x02
33 #define ADAU1977_REG_MICBIAS		0x03
34 #define ADAU1977_REG_BLOCK_POWER_SAI	0x04
35 #define ADAU1977_REG_SAI_CTRL0		0x05
36 #define ADAU1977_REG_SAI_CTRL1		0x06
37 #define ADAU1977_REG_CMAP12		0x07
38 #define ADAU1977_REG_CMAP34		0x08
39 #define ADAU1977_REG_SAI_OVERTEMP	0x09
40 #define ADAU1977_REG_POST_ADC_GAIN(x)	(0x0a + (x))
41 #define ADAU1977_REG_MISC_CONTROL	0x0e
42 #define ADAU1977_REG_DIAG_CONTROL	0x10
43 #define ADAU1977_REG_STATUS(x)		(0x11 + (x))
44 #define ADAU1977_REG_DIAG_IRQ1		0x15
45 #define ADAU1977_REG_DIAG_IRQ2		0x16
46 #define ADAU1977_REG_ADJUST1		0x17
47 #define ADAU1977_REG_ADJUST2		0x18
48 #define ADAU1977_REG_ADC_CLIP		0x19
49 #define ADAU1977_REG_DC_HPF_CAL		0x1a
50 
51 #define ADAU1977_POWER_RESET			BIT(7)
52 #define ADAU1977_POWER_PWUP			BIT(0)
53 
54 #define ADAU1977_PLL_CLK_S			BIT(4)
55 #define ADAU1977_PLL_MCS_MASK			0x7
56 
57 #define ADAU1977_MICBIAS_MB_VOLTS_MASK		0xf0
58 #define ADAU1977_MICBIAS_MB_VOLTS_OFFSET	4
59 
60 #define ADAU1977_BLOCK_POWER_SAI_LR_POL		BIT(7)
61 #define ADAU1977_BLOCK_POWER_SAI_BCLK_EDGE	BIT(6)
62 #define ADAU1977_BLOCK_POWER_SAI_LDO_EN		BIT(5)
63 
64 #define ADAU1977_SAI_CTRL0_FMT_MASK		(0x3 << 6)
65 #define ADAU1977_SAI_CTRL0_FMT_I2S		(0x0 << 6)
66 #define ADAU1977_SAI_CTRL0_FMT_LJ		(0x1 << 6)
67 #define ADAU1977_SAI_CTRL0_FMT_RJ_24BIT		(0x2 << 6)
68 #define ADAU1977_SAI_CTRL0_FMT_RJ_16BIT		(0x3 << 6)
69 
70 #define ADAU1977_SAI_CTRL0_SAI_MASK		(0x7 << 3)
71 #define ADAU1977_SAI_CTRL0_SAI_I2S		(0x0 << 3)
72 #define ADAU1977_SAI_CTRL0_SAI_TDM_2		(0x1 << 3)
73 #define ADAU1977_SAI_CTRL0_SAI_TDM_4		(0x2 << 3)
74 #define ADAU1977_SAI_CTRL0_SAI_TDM_8		(0x3 << 3)
75 #define ADAU1977_SAI_CTRL0_SAI_TDM_16		(0x4 << 3)
76 
77 #define ADAU1977_SAI_CTRL0_FS_MASK		(0x7)
78 #define ADAU1977_SAI_CTRL0_FS_8000_12000	(0x0)
79 #define ADAU1977_SAI_CTRL0_FS_16000_24000	(0x1)
80 #define ADAU1977_SAI_CTRL0_FS_32000_48000	(0x2)
81 #define ADAU1977_SAI_CTRL0_FS_64000_96000	(0x3)
82 #define ADAU1977_SAI_CTRL0_FS_128000_192000	(0x4)
83 
84 #define ADAU1977_SAI_CTRL1_SLOT_WIDTH_MASK	(0x3 << 5)
85 #define ADAU1977_SAI_CTRL1_SLOT_WIDTH_32	(0x0 << 5)
86 #define ADAU1977_SAI_CTRL1_SLOT_WIDTH_24	(0x1 << 5)
87 #define ADAU1977_SAI_CTRL1_SLOT_WIDTH_16	(0x2 << 5)
88 #define ADAU1977_SAI_CTRL1_DATA_WIDTH_MASK	(0x1 << 4)
89 #define ADAU1977_SAI_CTRL1_DATA_WIDTH_16BIT	(0x1 << 4)
90 #define ADAU1977_SAI_CTRL1_DATA_WIDTH_24BIT	(0x0 << 4)
91 #define ADAU1977_SAI_CTRL1_LRCLK_PULSE		BIT(3)
92 #define ADAU1977_SAI_CTRL1_MSB			BIT(2)
93 #define ADAU1977_SAI_CTRL1_BCLKRATE_16		(0x1 << 1)
94 #define ADAU1977_SAI_CTRL1_BCLKRATE_32		(0x0 << 1)
95 #define ADAU1977_SAI_CTRL1_BCLKRATE_MASK	(0x1 << 1)
96 #define ADAU1977_SAI_CTRL1_MASTER		BIT(0)
97 
98 #define ADAU1977_SAI_OVERTEMP_DRV_C(x)		BIT(4 + (x))
99 #define ADAU1977_SAI_OVERTEMP_DRV_HIZ		BIT(3)
100 
101 #define ADAU1977_MISC_CONTROL_SUM_MODE_MASK	(0x3 << 6)
102 #define ADAU1977_MISC_CONTROL_SUM_MODE_1CH	(0x2 << 6)
103 #define ADAU1977_MISC_CONTROL_SUM_MODE_2CH	(0x1 << 6)
104 #define ADAU1977_MISC_CONTROL_SUM_MODE_4CH	(0x0 << 6)
105 #define ADAU1977_MISC_CONTROL_MMUTE		BIT(4)
106 #define ADAU1977_MISC_CONTROL_DC_CAL		BIT(0)
107 
108 #define ADAU1977_CHAN_MAP_SECOND_SLOT_OFFSET	4
109 #define ADAU1977_CHAN_MAP_FIRST_SLOT_OFFSET	0
110 
111 struct adau1977 {
112 	struct regmap *regmap;
113 	bool right_j;
114 	unsigned int sysclk;
115 	enum adau1977_sysclk_src sysclk_src;
116 	struct gpio_desc *reset_gpio;
117 	enum adau1977_type type;
118 
119 	struct regulator *avdd_reg;
120 	struct regulator *dvdd_reg;
121 
122 	struct snd_pcm_hw_constraint_list constraints;
123 
124 	struct device *dev;
125 	void (*switch_mode)(struct device *dev);
126 
127 	unsigned int max_clock_provider_fs;
128 	unsigned int slot_width;
129 	bool enabled;
130 	bool clock_provider;
131 };
132 
133 static const struct reg_default adau1977_reg_defaults[] = {
134 	{ 0x00, 0x00 },
135 	{ 0x01, 0x41 },
136 	{ 0x02, 0x4a },
137 	{ 0x03, 0x7d },
138 	{ 0x04, 0x3d },
139 	{ 0x05, 0x02 },
140 	{ 0x06, 0x00 },
141 	{ 0x07, 0x10 },
142 	{ 0x08, 0x32 },
143 	{ 0x09, 0xf0 },
144 	{ 0x0a, 0xa0 },
145 	{ 0x0b, 0xa0 },
146 	{ 0x0c, 0xa0 },
147 	{ 0x0d, 0xa0 },
148 	{ 0x0e, 0x02 },
149 	{ 0x10, 0x0f },
150 	{ 0x15, 0x20 },
151 	{ 0x16, 0x00 },
152 	{ 0x17, 0x00 },
153 	{ 0x18, 0x00 },
154 	{ 0x1a, 0x00 },
155 };
156 
157 static const DECLARE_TLV_DB_MINMAX_MUTE(adau1977_adc_gain, -3562, 6000);
158 
159 static const struct snd_soc_dapm_widget adau1977_micbias_dapm_widgets[] = {
160 	SND_SOC_DAPM_SUPPLY("MICBIAS", ADAU1977_REG_MICBIAS,
161 		3, 0, NULL, 0)
162 };
163 
164 static const struct snd_soc_dapm_widget adau1977_dapm_widgets[] = {
165 	SND_SOC_DAPM_SUPPLY("Vref", ADAU1977_REG_BLOCK_POWER_SAI,
166 		4, 0, NULL, 0),
167 
168 	SND_SOC_DAPM_ADC("ADC1", "Capture", ADAU1977_REG_BLOCK_POWER_SAI, 0, 0),
169 	SND_SOC_DAPM_ADC("ADC2", "Capture", ADAU1977_REG_BLOCK_POWER_SAI, 1, 0),
170 	SND_SOC_DAPM_ADC("ADC3", "Capture", ADAU1977_REG_BLOCK_POWER_SAI, 2, 0),
171 	SND_SOC_DAPM_ADC("ADC4", "Capture", ADAU1977_REG_BLOCK_POWER_SAI, 3, 0),
172 
173 	SND_SOC_DAPM_INPUT("AIN1"),
174 	SND_SOC_DAPM_INPUT("AIN2"),
175 	SND_SOC_DAPM_INPUT("AIN3"),
176 	SND_SOC_DAPM_INPUT("AIN4"),
177 
178 	SND_SOC_DAPM_OUTPUT("VREF"),
179 };
180 
181 static const struct snd_soc_dapm_route adau1977_dapm_routes[] = {
182 	{ "ADC1", NULL, "AIN1" },
183 	{ "ADC2", NULL, "AIN2" },
184 	{ "ADC3", NULL, "AIN3" },
185 	{ "ADC4", NULL, "AIN4" },
186 
187 	{ "ADC1", NULL, "Vref" },
188 	{ "ADC2", NULL, "Vref" },
189 	{ "ADC3", NULL, "Vref" },
190 	{ "ADC4", NULL, "Vref" },
191 
192 	{ "VREF", NULL, "Vref" },
193 };
194 
195 #define ADAU1977_VOLUME(x) \
196 	SOC_SINGLE_TLV("ADC" #x " Capture Volume", \
197 		ADAU1977_REG_POST_ADC_GAIN((x) - 1), \
198 		0, 255, 1, adau1977_adc_gain)
199 
200 #define ADAU1977_HPF_SWITCH(x) \
201 	SOC_SINGLE("ADC" #x " Highpass-Filter Capture Switch", \
202 		ADAU1977_REG_DC_HPF_CAL, (x) - 1, 1, 0)
203 
204 #define ADAU1977_DC_SUB_SWITCH(x) \
205 	SOC_SINGLE("ADC" #x " DC Subtraction Capture Switch", \
206 		ADAU1977_REG_DC_HPF_CAL, (x) + 3, 1, 0)
207 
208 static const struct snd_kcontrol_new adau1977_snd_controls[] = {
209 	ADAU1977_VOLUME(1),
210 	ADAU1977_VOLUME(2),
211 	ADAU1977_VOLUME(3),
212 	ADAU1977_VOLUME(4),
213 
214 	ADAU1977_HPF_SWITCH(1),
215 	ADAU1977_HPF_SWITCH(2),
216 	ADAU1977_HPF_SWITCH(3),
217 	ADAU1977_HPF_SWITCH(4),
218 
219 	ADAU1977_DC_SUB_SWITCH(1),
220 	ADAU1977_DC_SUB_SWITCH(2),
221 	ADAU1977_DC_SUB_SWITCH(3),
222 	ADAU1977_DC_SUB_SWITCH(4),
223 };
224 
adau1977_reset(struct adau1977 * adau1977)225 static int adau1977_reset(struct adau1977 *adau1977)
226 {
227 	int ret;
228 
229 	/*
230 	 * The reset bit is obviously volatile, but we need to be able to cache
231 	 * the other bits in the register, so we can't just mark the whole
232 	 * register as volatile. Since this is the only place where we'll ever
233 	 * touch the reset bit just bypass the cache for this operation.
234 	 */
235 	regcache_cache_bypass(adau1977->regmap, true);
236 	ret = regmap_write(adau1977->regmap, ADAU1977_REG_POWER,
237 			ADAU1977_POWER_RESET);
238 	regcache_cache_bypass(adau1977->regmap, false);
239 
240 	return ret;
241 }
242 
243 /*
244  * Returns the appropriate setting for ths FS field in the CTRL0 register
245  * depending on the rate.
246  */
adau1977_lookup_fs(unsigned int rate)247 static int adau1977_lookup_fs(unsigned int rate)
248 {
249 	if (rate >= 8000 && rate <= 12000)
250 		return ADAU1977_SAI_CTRL0_FS_8000_12000;
251 	else if (rate >= 16000 && rate <= 24000)
252 		return ADAU1977_SAI_CTRL0_FS_16000_24000;
253 	else if (rate >= 32000 && rate <= 48000)
254 		return ADAU1977_SAI_CTRL0_FS_32000_48000;
255 	else if (rate >= 64000 && rate <= 96000)
256 		return ADAU1977_SAI_CTRL0_FS_64000_96000;
257 	else if (rate >= 128000 && rate <= 192000)
258 		return ADAU1977_SAI_CTRL0_FS_128000_192000;
259 	else
260 		return -EINVAL;
261 }
262 
adau1977_lookup_mcs(struct adau1977 * adau1977,unsigned int rate,unsigned int fs)263 static int adau1977_lookup_mcs(struct adau1977 *adau1977, unsigned int rate,
264 	unsigned int fs)
265 {
266 	unsigned int mcs;
267 
268 	/*
269 	 * rate = sysclk / (512 * mcs_lut[mcs]) * 2**fs
270 	 * => mcs_lut[mcs] = sysclk / (512 * rate) * 2**fs
271 	 * => mcs_lut[mcs] = sysclk / ((512 / 2**fs) * rate)
272 	 */
273 
274 	rate *= 512 >> fs;
275 
276 	if (adau1977->sysclk % rate != 0)
277 		return -EINVAL;
278 
279 	mcs = adau1977->sysclk / rate;
280 
281 	/* The factors configured by MCS are 1, 2, 3, 4, 6 */
282 	if (mcs < 1 || mcs > 6 || mcs == 5)
283 		return -EINVAL;
284 
285 	mcs = mcs - 1;
286 	if (mcs == 5)
287 		mcs = 4;
288 
289 	return mcs;
290 }
291 
adau1977_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params,struct snd_soc_dai * dai)292 static int adau1977_hw_params(struct snd_pcm_substream *substream,
293 	struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
294 {
295 	struct snd_soc_component *component = dai->component;
296 	struct adau1977 *adau1977 = snd_soc_component_get_drvdata(component);
297 	unsigned int rate = params_rate(params);
298 	unsigned int slot_width;
299 	unsigned int ctrl0, ctrl0_mask;
300 	unsigned int ctrl1;
301 	int mcs, fs;
302 	int ret;
303 
304 	fs = adau1977_lookup_fs(rate);
305 	if (fs < 0)
306 		return fs;
307 
308 	if (adau1977->sysclk_src == ADAU1977_SYSCLK_SRC_MCLK) {
309 		mcs = adau1977_lookup_mcs(adau1977, rate, fs);
310 		if (mcs < 0)
311 			return mcs;
312 	} else {
313 		mcs = 0;
314 	}
315 
316 	ctrl0_mask = ADAU1977_SAI_CTRL0_FS_MASK;
317 	ctrl0 = fs;
318 
319 	if (adau1977->right_j) {
320 		switch (params_width(params)) {
321 		case 16:
322 			ctrl0 |= ADAU1977_SAI_CTRL0_FMT_RJ_16BIT;
323 			break;
324 		case 24:
325 			ctrl0 |= ADAU1977_SAI_CTRL0_FMT_RJ_24BIT;
326 			break;
327 		default:
328 			return -EINVAL;
329 		}
330 		ctrl0_mask |= ADAU1977_SAI_CTRL0_FMT_MASK;
331 	}
332 
333 	if (adau1977->clock_provider) {
334 		switch (params_width(params)) {
335 		case 16:
336 			ctrl1 = ADAU1977_SAI_CTRL1_DATA_WIDTH_16BIT;
337 			slot_width = 16;
338 			break;
339 		case 24:
340 		case 32:
341 			ctrl1 = ADAU1977_SAI_CTRL1_DATA_WIDTH_24BIT;
342 			slot_width = 32;
343 			break;
344 		default:
345 			return -EINVAL;
346 		}
347 
348 		/* In TDM mode there is a fixed slot width */
349 		if (adau1977->slot_width)
350 			slot_width = adau1977->slot_width;
351 
352 		if (slot_width == 16)
353 			ctrl1 |= ADAU1977_SAI_CTRL1_BCLKRATE_16;
354 		else
355 			ctrl1 |= ADAU1977_SAI_CTRL1_BCLKRATE_32;
356 
357 		ret = regmap_update_bits(adau1977->regmap,
358 			ADAU1977_REG_SAI_CTRL1,
359 			ADAU1977_SAI_CTRL1_DATA_WIDTH_MASK |
360 			ADAU1977_SAI_CTRL1_BCLKRATE_MASK,
361 			ctrl1);
362 		if (ret < 0)
363 			return ret;
364 	}
365 
366 	ret = regmap_update_bits(adau1977->regmap, ADAU1977_REG_SAI_CTRL0,
367 				ctrl0_mask, ctrl0);
368 	if (ret < 0)
369 		return ret;
370 
371 	return regmap_update_bits(adau1977->regmap, ADAU1977_REG_PLL,
372 				ADAU1977_PLL_MCS_MASK, mcs);
373 }
374 
adau1977_power_disable(struct adau1977 * adau1977)375 static int adau1977_power_disable(struct adau1977 *adau1977)
376 {
377 	int ret = 0;
378 
379 	if (!adau1977->enabled)
380 		return 0;
381 
382 	ret = regmap_update_bits(adau1977->regmap, ADAU1977_REG_POWER,
383 		ADAU1977_POWER_PWUP, 0);
384 	if (ret)
385 		return ret;
386 
387 	regcache_mark_dirty(adau1977->regmap);
388 
389 	gpiod_set_value_cansleep(adau1977->reset_gpio, 0);
390 
391 	regcache_cache_only(adau1977->regmap, true);
392 
393 	regulator_disable(adau1977->avdd_reg);
394 	if (adau1977->dvdd_reg)
395 		regulator_disable(adau1977->dvdd_reg);
396 
397 	adau1977->enabled = false;
398 
399 	return 0;
400 }
401 
adau1977_power_enable(struct adau1977 * adau1977)402 static int adau1977_power_enable(struct adau1977 *adau1977)
403 {
404 	unsigned int val;
405 	int ret = 0;
406 
407 	if (adau1977->enabled)
408 		return 0;
409 
410 	ret = regulator_enable(adau1977->avdd_reg);
411 	if (ret)
412 		return ret;
413 
414 	if (adau1977->dvdd_reg) {
415 		ret = regulator_enable(adau1977->dvdd_reg);
416 		if (ret)
417 			goto err_disable_avdd;
418 	}
419 
420 	gpiod_set_value_cansleep(adau1977->reset_gpio, 1);
421 
422 	regcache_cache_only(adau1977->regmap, false);
423 
424 	if (adau1977->switch_mode)
425 		adau1977->switch_mode(adau1977->dev);
426 
427 	ret = adau1977_reset(adau1977);
428 	if (ret)
429 		goto err_disable_dvdd;
430 
431 	ret = regmap_update_bits(adau1977->regmap, ADAU1977_REG_POWER,
432 		ADAU1977_POWER_PWUP, ADAU1977_POWER_PWUP);
433 	if (ret)
434 		goto err_disable_dvdd;
435 
436 	ret = regcache_sync(adau1977->regmap);
437 	if (ret)
438 		goto err_disable_dvdd;
439 
440 	/*
441 	 * The PLL register is not affected by the software reset. It is
442 	 * possible that the value of the register was changed to the
443 	 * default value while we were in cache only mode. In this case
444 	 * regcache_sync will skip over it and we have to manually sync
445 	 * it.
446 	 */
447 	ret = regmap_read(adau1977->regmap, ADAU1977_REG_PLL, &val);
448 	if (ret)
449 		goto err_disable_dvdd;
450 
451 	if (val == 0x41) {
452 		regcache_cache_bypass(adau1977->regmap, true);
453 		ret = regmap_write(adau1977->regmap, ADAU1977_REG_PLL,
454 			0x41);
455 		if (ret)
456 			goto err_disable_dvdd;
457 		regcache_cache_bypass(adau1977->regmap, false);
458 	}
459 
460 	adau1977->enabled = true;
461 
462 	return ret;
463 
464 err_disable_dvdd:
465 	if (adau1977->dvdd_reg)
466 		regulator_disable(adau1977->dvdd_reg);
467 err_disable_avdd:
468 		regulator_disable(adau1977->avdd_reg);
469 	return ret;
470 }
471 
adau1977_set_bias_level(struct snd_soc_component * component,enum snd_soc_bias_level level)472 static int adau1977_set_bias_level(struct snd_soc_component *component,
473 	enum snd_soc_bias_level level)
474 {
475 	struct adau1977 *adau1977 = snd_soc_component_get_drvdata(component);
476 	int ret = 0;
477 
478 	switch (level) {
479 	case SND_SOC_BIAS_ON:
480 		break;
481 	case SND_SOC_BIAS_PREPARE:
482 		break;
483 	case SND_SOC_BIAS_STANDBY:
484 		if (snd_soc_component_get_bias_level(component) == SND_SOC_BIAS_OFF)
485 			ret = adau1977_power_enable(adau1977);
486 		break;
487 	case SND_SOC_BIAS_OFF:
488 		ret = adau1977_power_disable(adau1977);
489 		break;
490 	}
491 
492 	return ret;
493 }
494 
adau1977_set_tdm_slot(struct snd_soc_dai * dai,unsigned int tx_mask,unsigned int rx_mask,int slots,int width)495 static int adau1977_set_tdm_slot(struct snd_soc_dai *dai, unsigned int tx_mask,
496 	unsigned int rx_mask, int slots, int width)
497 {
498 	struct adau1977 *adau1977 = snd_soc_component_get_drvdata(dai->component);
499 	unsigned int ctrl0, ctrl1, drv;
500 	unsigned int slot[4];
501 	unsigned int i;
502 	int ret;
503 
504 	if (slots == 0) {
505 		/* 0 = No fixed slot width */
506 		adau1977->slot_width = 0;
507 		adau1977->max_clock_provider_fs = 192000;
508 		return regmap_update_bits(adau1977->regmap,
509 			ADAU1977_REG_SAI_CTRL0, ADAU1977_SAI_CTRL0_SAI_MASK,
510 			ADAU1977_SAI_CTRL0_SAI_I2S);
511 	}
512 
513 	if (rx_mask == 0 || tx_mask != 0)
514 		return -EINVAL;
515 
516 	drv = 0;
517 	for (i = 0; i < 4; i++) {
518 		slot[i] = __ffs(rx_mask);
519 		drv |= ADAU1977_SAI_OVERTEMP_DRV_C(i);
520 		rx_mask &= ~(1 << slot[i]);
521 		if (slot[i] >= slots)
522 			return -EINVAL;
523 		if (rx_mask == 0)
524 			break;
525 	}
526 
527 	if (rx_mask != 0)
528 		return -EINVAL;
529 
530 	switch (width) {
531 	case 16:
532 		ctrl1 = ADAU1977_SAI_CTRL1_SLOT_WIDTH_16;
533 		break;
534 	case 24:
535 		/* We can only generate 16 bit or 32 bit wide slots */
536 		if (adau1977->clock_provider)
537 			return -EINVAL;
538 		ctrl1 = ADAU1977_SAI_CTRL1_SLOT_WIDTH_24;
539 		break;
540 	case 32:
541 		ctrl1 = ADAU1977_SAI_CTRL1_SLOT_WIDTH_32;
542 		break;
543 	default:
544 		return -EINVAL;
545 	}
546 
547 	switch (slots) {
548 	case 2:
549 		ctrl0 = ADAU1977_SAI_CTRL0_SAI_TDM_2;
550 		break;
551 	case 4:
552 		ctrl0 = ADAU1977_SAI_CTRL0_SAI_TDM_4;
553 		break;
554 	case 8:
555 		ctrl0 = ADAU1977_SAI_CTRL0_SAI_TDM_8;
556 		break;
557 	case 16:
558 		ctrl0 = ADAU1977_SAI_CTRL0_SAI_TDM_16;
559 		break;
560 	default:
561 		return -EINVAL;
562 	}
563 
564 	ret = regmap_update_bits(adau1977->regmap, ADAU1977_REG_SAI_OVERTEMP,
565 		ADAU1977_SAI_OVERTEMP_DRV_C(0) |
566 		ADAU1977_SAI_OVERTEMP_DRV_C(1) |
567 		ADAU1977_SAI_OVERTEMP_DRV_C(2) |
568 		ADAU1977_SAI_OVERTEMP_DRV_C(3), drv);
569 	if (ret)
570 		return ret;
571 
572 	ret = regmap_write(adau1977->regmap, ADAU1977_REG_CMAP12,
573 		(slot[1] << ADAU1977_CHAN_MAP_SECOND_SLOT_OFFSET) |
574 		(slot[0] << ADAU1977_CHAN_MAP_FIRST_SLOT_OFFSET));
575 	if (ret)
576 		return ret;
577 
578 	ret = regmap_write(adau1977->regmap, ADAU1977_REG_CMAP34,
579 		(slot[3] << ADAU1977_CHAN_MAP_SECOND_SLOT_OFFSET) |
580 		(slot[2] << ADAU1977_CHAN_MAP_FIRST_SLOT_OFFSET));
581 	if (ret)
582 		return ret;
583 
584 	ret = regmap_update_bits(adau1977->regmap, ADAU1977_REG_SAI_CTRL0,
585 		ADAU1977_SAI_CTRL0_SAI_MASK, ctrl0);
586 	if (ret)
587 		return ret;
588 
589 	ret = regmap_update_bits(adau1977->regmap, ADAU1977_REG_SAI_CTRL1,
590 		ADAU1977_SAI_CTRL1_SLOT_WIDTH_MASK, ctrl1);
591 	if (ret)
592 		return ret;
593 
594 	adau1977->slot_width = width;
595 
596 	/* In clock provider mode the maximum bitclock is 24.576 MHz */
597 	adau1977->max_clock_provider_fs = min(192000, 24576000 / width / slots);
598 
599 	return 0;
600 }
601 
adau1977_mute(struct snd_soc_dai * dai,int mute,int stream)602 static int adau1977_mute(struct snd_soc_dai *dai, int mute, int stream)
603 {
604 	struct adau1977 *adau1977 = snd_soc_component_get_drvdata(dai->component);
605 	unsigned int val;
606 
607 	if (mute)
608 		val = ADAU1977_MISC_CONTROL_MMUTE;
609 	else
610 		val = 0;
611 
612 	return regmap_update_bits(adau1977->regmap, ADAU1977_REG_MISC_CONTROL,
613 			ADAU1977_MISC_CONTROL_MMUTE, val);
614 }
615 
adau1977_set_dai_fmt(struct snd_soc_dai * dai,unsigned int fmt)616 static int adau1977_set_dai_fmt(struct snd_soc_dai *dai, unsigned int fmt)
617 {
618 	struct adau1977 *adau1977 = snd_soc_component_get_drvdata(dai->component);
619 	unsigned int ctrl0 = 0, ctrl1 = 0, block_power = 0;
620 	bool invert_lrclk;
621 	int ret;
622 
623 	switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) {
624 	case SND_SOC_DAIFMT_CBC_CFC:
625 		adau1977->clock_provider = false;
626 		break;
627 	case SND_SOC_DAIFMT_CBP_CFP:
628 		ctrl1 |= ADAU1977_SAI_CTRL1_MASTER;
629 		adau1977->clock_provider = true;
630 		break;
631 	default:
632 		return -EINVAL;
633 	}
634 
635 	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
636 	case SND_SOC_DAIFMT_NB_NF:
637 		invert_lrclk = false;
638 		break;
639 	case SND_SOC_DAIFMT_IB_NF:
640 		block_power |= ADAU1977_BLOCK_POWER_SAI_BCLK_EDGE;
641 		invert_lrclk = false;
642 		break;
643 	case SND_SOC_DAIFMT_NB_IF:
644 		invert_lrclk = true;
645 		break;
646 	case SND_SOC_DAIFMT_IB_IF:
647 		block_power |= ADAU1977_BLOCK_POWER_SAI_BCLK_EDGE;
648 		invert_lrclk = true;
649 		break;
650 	default:
651 		return -EINVAL;
652 	}
653 
654 	adau1977->right_j = false;
655 	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
656 	case SND_SOC_DAIFMT_I2S:
657 		ctrl0 |= ADAU1977_SAI_CTRL0_FMT_I2S;
658 		break;
659 	case SND_SOC_DAIFMT_LEFT_J:
660 		ctrl0 |= ADAU1977_SAI_CTRL0_FMT_LJ;
661 		invert_lrclk = !invert_lrclk;
662 		break;
663 	case SND_SOC_DAIFMT_RIGHT_J:
664 		ctrl0 |= ADAU1977_SAI_CTRL0_FMT_RJ_24BIT;
665 		adau1977->right_j = true;
666 		invert_lrclk = !invert_lrclk;
667 		break;
668 	case SND_SOC_DAIFMT_DSP_A:
669 		ctrl1 |= ADAU1977_SAI_CTRL1_LRCLK_PULSE;
670 		ctrl0 |= ADAU1977_SAI_CTRL0_FMT_I2S;
671 		invert_lrclk = false;
672 		break;
673 	case SND_SOC_DAIFMT_DSP_B:
674 		ctrl1 |= ADAU1977_SAI_CTRL1_LRCLK_PULSE;
675 		ctrl0 |= ADAU1977_SAI_CTRL0_FMT_LJ;
676 		invert_lrclk = false;
677 		break;
678 	default:
679 		return -EINVAL;
680 	}
681 
682 	if (invert_lrclk)
683 		block_power |= ADAU1977_BLOCK_POWER_SAI_LR_POL;
684 
685 	ret = regmap_update_bits(adau1977->regmap, ADAU1977_REG_BLOCK_POWER_SAI,
686 		ADAU1977_BLOCK_POWER_SAI_LR_POL |
687 		ADAU1977_BLOCK_POWER_SAI_BCLK_EDGE, block_power);
688 	if (ret)
689 		return ret;
690 
691 	ret = regmap_update_bits(adau1977->regmap, ADAU1977_REG_SAI_CTRL0,
692 		ADAU1977_SAI_CTRL0_FMT_MASK,
693 		ctrl0);
694 	if (ret)
695 		return ret;
696 
697 	return regmap_update_bits(adau1977->regmap, ADAU1977_REG_SAI_CTRL1,
698 		ADAU1977_SAI_CTRL1_MASTER | ADAU1977_SAI_CTRL1_LRCLK_PULSE,
699 		ctrl1);
700 }
701 
adau1977_startup(struct snd_pcm_substream * substream,struct snd_soc_dai * dai)702 static int adau1977_startup(struct snd_pcm_substream *substream,
703 	struct snd_soc_dai *dai)
704 {
705 	struct adau1977 *adau1977 = snd_soc_component_get_drvdata(dai->component);
706 	u64 formats = 0;
707 
708 	if (adau1977->slot_width == 16)
709 		formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE;
710 	else if (adau1977->right_j || adau1977->slot_width == 24)
711 		formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE |
712 			SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE;
713 
714 	snd_pcm_hw_constraint_list(substream->runtime, 0,
715 		SNDRV_PCM_HW_PARAM_RATE, &adau1977->constraints);
716 
717 	if (adau1977->clock_provider)
718 		snd_pcm_hw_constraint_minmax(substream->runtime,
719 			SNDRV_PCM_HW_PARAM_RATE, 8000,
720 					     adau1977->max_clock_provider_fs);
721 
722 	if (formats != 0)
723 		snd_pcm_hw_constraint_mask64(substream->runtime,
724 			SNDRV_PCM_HW_PARAM_FORMAT, formats);
725 
726 	return 0;
727 }
728 
adau1977_set_tristate(struct snd_soc_dai * dai,int tristate)729 static int adau1977_set_tristate(struct snd_soc_dai *dai, int tristate)
730 {
731 	struct adau1977 *adau1977 = snd_soc_component_get_drvdata(dai->component);
732 	unsigned int val;
733 
734 	if (tristate)
735 		val = ADAU1977_SAI_OVERTEMP_DRV_HIZ;
736 	else
737 		val = 0;
738 
739 	return regmap_update_bits(adau1977->regmap, ADAU1977_REG_SAI_OVERTEMP,
740 		ADAU1977_SAI_OVERTEMP_DRV_HIZ, val);
741 }
742 
743 static const struct snd_soc_dai_ops adau1977_dai_ops = {
744 	.startup	= adau1977_startup,
745 	.hw_params	= adau1977_hw_params,
746 	.mute_stream	= adau1977_mute,
747 	.set_fmt	= adau1977_set_dai_fmt,
748 	.set_tdm_slot	= adau1977_set_tdm_slot,
749 	.set_tristate	= adau1977_set_tristate,
750 };
751 
752 static struct snd_soc_dai_driver adau1977_dai = {
753 	.name = "adau1977-hifi",
754 	.capture = {
755 		.stream_name = "Capture",
756 		.channels_min = 1,
757 		.channels_max = 4,
758 		.rates = SNDRV_PCM_RATE_KNOT,
759 		.formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE |
760 		    SNDRV_PCM_FMTBIT_S32_LE,
761 		.sig_bits = 24,
762 	},
763 	.ops = &adau1977_dai_ops,
764 };
765 
766 static const unsigned int adau1977_rates[] = {
767 	8000, 16000, 32000, 64000, 128000,
768 	11025, 22050, 44100, 88200, 172400,
769 	12000, 24000, 48000, 96000, 192000,
770 };
771 
772 #define ADAU1977_RATE_CONSTRAINT_MASK_32000 0x001f
773 #define ADAU1977_RATE_CONSTRAINT_MASK_44100 0x03e0
774 #define ADAU1977_RATE_CONSTRAINT_MASK_48000 0x7c00
775 /* All rates >= 32000 */
776 #define ADAU1977_RATE_CONSTRAINT_MASK_LRCLK 0x739c
777 
adau1977_check_sysclk(unsigned int mclk,unsigned int base_freq)778 static bool adau1977_check_sysclk(unsigned int mclk, unsigned int base_freq)
779 {
780 	unsigned int mcs;
781 
782 	if (mclk % (base_freq * 128) != 0)
783 		return false;
784 
785 	mcs = mclk / (128 * base_freq);
786 	if (mcs < 1 || mcs > 6 || mcs == 5)
787 		return false;
788 
789 	return true;
790 }
791 
adau1977_set_sysclk(struct snd_soc_component * component,int clk_id,int source,unsigned int freq,int dir)792 static int adau1977_set_sysclk(struct snd_soc_component *component,
793 	int clk_id, int source, unsigned int freq, int dir)
794 {
795 	struct adau1977 *adau1977 = snd_soc_component_get_drvdata(component);
796 	unsigned int mask = 0;
797 	unsigned int clk_src;
798 	unsigned int ret;
799 
800 	if (dir != SND_SOC_CLOCK_IN)
801 		return -EINVAL;
802 
803 	if (clk_id != ADAU1977_SYSCLK)
804 		return -EINVAL;
805 
806 	switch (source) {
807 	case ADAU1977_SYSCLK_SRC_MCLK:
808 		clk_src = 0;
809 		break;
810 	case ADAU1977_SYSCLK_SRC_LRCLK:
811 		clk_src = ADAU1977_PLL_CLK_S;
812 		break;
813 	default:
814 		return -EINVAL;
815 	}
816 
817 	if (freq != 0 && source == ADAU1977_SYSCLK_SRC_MCLK) {
818 		if (freq < 4000000 || freq > 36864000)
819 			return -EINVAL;
820 
821 		if (adau1977_check_sysclk(freq, 32000))
822 			mask |= ADAU1977_RATE_CONSTRAINT_MASK_32000;
823 		if (adau1977_check_sysclk(freq, 44100))
824 			mask |= ADAU1977_RATE_CONSTRAINT_MASK_44100;
825 		if (adau1977_check_sysclk(freq, 48000))
826 			mask |= ADAU1977_RATE_CONSTRAINT_MASK_48000;
827 
828 		if (mask == 0)
829 			return -EINVAL;
830 	} else if (source == ADAU1977_SYSCLK_SRC_LRCLK) {
831 		mask = ADAU1977_RATE_CONSTRAINT_MASK_LRCLK;
832 	}
833 
834 	ret = regmap_update_bits(adau1977->regmap, ADAU1977_REG_PLL,
835 		ADAU1977_PLL_CLK_S, clk_src);
836 	if (ret)
837 		return ret;
838 
839 	adau1977->constraints.mask = mask;
840 	adau1977->sysclk_src = source;
841 	adau1977->sysclk = freq;
842 
843 	return 0;
844 }
845 
adau1977_component_probe(struct snd_soc_component * component)846 static int adau1977_component_probe(struct snd_soc_component *component)
847 {
848 	struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(component);
849 	struct adau1977 *adau1977 = snd_soc_component_get_drvdata(component);
850 	int ret;
851 
852 	switch (adau1977->type) {
853 	case ADAU1977:
854 		ret = snd_soc_dapm_new_controls(dapm,
855 			adau1977_micbias_dapm_widgets,
856 			ARRAY_SIZE(adau1977_micbias_dapm_widgets));
857 		if (ret < 0)
858 			return ret;
859 		break;
860 	default:
861 		break;
862 	}
863 
864 	return 0;
865 }
866 
867 static const struct snd_soc_component_driver adau1977_component_driver = {
868 	.probe			= adau1977_component_probe,
869 	.set_bias_level		= adau1977_set_bias_level,
870 	.set_sysclk		= adau1977_set_sysclk,
871 	.controls		= adau1977_snd_controls,
872 	.num_controls		= ARRAY_SIZE(adau1977_snd_controls),
873 	.dapm_widgets		= adau1977_dapm_widgets,
874 	.num_dapm_widgets	= ARRAY_SIZE(adau1977_dapm_widgets),
875 	.dapm_routes		= adau1977_dapm_routes,
876 	.num_dapm_routes	= ARRAY_SIZE(adau1977_dapm_routes),
877 	.use_pmdown_time	= 1,
878 	.endianness		= 1,
879 };
880 
adau1977_setup_micbias(struct adau1977 * adau1977)881 static int adau1977_setup_micbias(struct adau1977 *adau1977)
882 {
883 	unsigned int micbias;
884 
885 	if (device_property_read_u32(adau1977->dev, "adi,micbias", &micbias))
886 		micbias = ADAU1977_MICBIAS_8V5;
887 
888 	if (micbias > ADAU1977_MICBIAS_9V0) {
889 		dev_err(adau1977->dev, "Invalid value for 'adi,micbias'\n");
890 		return -EINVAL;
891 	}
892 
893 	return regmap_update_bits(adau1977->regmap, ADAU1977_REG_MICBIAS,
894 		ADAU1977_MICBIAS_MB_VOLTS_MASK,
895 		micbias << ADAU1977_MICBIAS_MB_VOLTS_OFFSET);
896 }
897 
adau1977_probe(struct device * dev,struct regmap * regmap,enum adau1977_type type,void (* switch_mode)(struct device * dev))898 int adau1977_probe(struct device *dev, struct regmap *regmap,
899 	enum adau1977_type type, void (*switch_mode)(struct device *dev))
900 {
901 	unsigned int power_off_mask;
902 	struct adau1977 *adau1977;
903 	int ret;
904 
905 	if (IS_ERR(regmap))
906 		return PTR_ERR(regmap);
907 
908 	adau1977 = devm_kzalloc(dev, sizeof(*adau1977), GFP_KERNEL);
909 	if (adau1977 == NULL)
910 		return -ENOMEM;
911 
912 	adau1977->dev = dev;
913 	adau1977->type = type;
914 	adau1977->regmap = regmap;
915 	adau1977->switch_mode = switch_mode;
916 	adau1977->max_clock_provider_fs = 192000;
917 
918 	adau1977->constraints.list = adau1977_rates;
919 	adau1977->constraints.count = ARRAY_SIZE(adau1977_rates);
920 
921 	adau1977->avdd_reg = devm_regulator_get(dev, "AVDD");
922 	if (IS_ERR(adau1977->avdd_reg))
923 		return PTR_ERR(adau1977->avdd_reg);
924 
925 	adau1977->dvdd_reg = devm_regulator_get_optional(dev, "DVDD");
926 	if (IS_ERR(adau1977->dvdd_reg)) {
927 		if (PTR_ERR(adau1977->dvdd_reg) != -ENODEV)
928 			return PTR_ERR(adau1977->dvdd_reg);
929 		adau1977->dvdd_reg = NULL;
930 	}
931 
932 	adau1977->reset_gpio = devm_gpiod_get_optional(dev, "reset",
933 						       GPIOD_OUT_LOW);
934 	if (IS_ERR(adau1977->reset_gpio))
935 		return PTR_ERR(adau1977->reset_gpio);
936 
937 	dev_set_drvdata(dev, adau1977);
938 
939 	if (adau1977->reset_gpio)
940 		ndelay(100);
941 
942 	ret = adau1977_power_enable(adau1977);
943 	if (ret)
944 		return ret;
945 
946 	if (type == ADAU1977) {
947 		ret = adau1977_setup_micbias(adau1977);
948 		if (ret)
949 			goto err_poweroff;
950 	}
951 
952 	if (adau1977->dvdd_reg)
953 		power_off_mask = ~0;
954 	else
955 		power_off_mask = (unsigned int)~ADAU1977_BLOCK_POWER_SAI_LDO_EN;
956 
957 	ret = regmap_update_bits(adau1977->regmap, ADAU1977_REG_BLOCK_POWER_SAI,
958 				power_off_mask, 0x00);
959 	if (ret)
960 		goto err_poweroff;
961 
962 	ret = adau1977_power_disable(adau1977);
963 	if (ret)
964 		return ret;
965 
966 	return devm_snd_soc_register_component(dev, &adau1977_component_driver,
967 			&adau1977_dai, 1);
968 
969 err_poweroff:
970 	adau1977_power_disable(adau1977);
971 	return ret;
972 
973 }
974 EXPORT_SYMBOL_GPL(adau1977_probe);
975 
adau1977_register_volatile(struct device * dev,unsigned int reg)976 static bool adau1977_register_volatile(struct device *dev, unsigned int reg)
977 {
978 	switch (reg) {
979 	case ADAU1977_REG_STATUS(0):
980 	case ADAU1977_REG_STATUS(1):
981 	case ADAU1977_REG_STATUS(2):
982 	case ADAU1977_REG_STATUS(3):
983 	case ADAU1977_REG_ADC_CLIP:
984 		return true;
985 	}
986 
987 	return false;
988 }
989 
990 const struct regmap_config adau1977_regmap_config = {
991 	.max_register = ADAU1977_REG_DC_HPF_CAL,
992 	.volatile_reg = adau1977_register_volatile,
993 
994 	.cache_type = REGCACHE_MAPLE,
995 	.reg_defaults = adau1977_reg_defaults,
996 	.num_reg_defaults = ARRAY_SIZE(adau1977_reg_defaults),
997 };
998 EXPORT_SYMBOL_GPL(adau1977_regmap_config);
999 
1000 MODULE_DESCRIPTION("ASoC ADAU1977/ADAU1978/ADAU1979 driver");
1001 MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
1002 MODULE_LICENSE("GPL");
1003