summaryrefslogtreecommitdiffstats
path: root/sound/soc/codecs/max98504.c
blob: a7320e709890f576d16906218399a1c5ba29a324 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
/*
 * MAX98504 ALSA SoC Audio driver
 *
 * Copyright 2013 - 2014 Maxim Integrated Products
 * Copyright 2016 Samsung Electronics Co., Ltd.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/delay.h>
#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/regulator/consumer.h>
#include <linux/slab.h>
#include <linux/types.h>
#include <sound/soc.h>

#include "max98504.h"

static const char * const max98504_supply_names[] = {
	"DVDD",
	"DIOVDD",
	"PVDD",
};
#define MAX98504_NUM_SUPPLIES ARRAY_SIZE(max98504_supply_names)

struct max98504_priv {
	struct regmap *regmap;
	struct regulator_bulk_data supplies[MAX98504_NUM_SUPPLIES];
	unsigned int pcm_rx_channels;
	bool brownout_enable;
	unsigned int brownout_threshold;
	unsigned int brownout_attenuation;
	unsigned int brownout_attack_hold;
	unsigned int brownout_timed_hold;
	unsigned int brownout_release_rate;
};

static struct reg_default max98504_reg_defaults[] = {
	{ 0x01,	0},
	{ 0x02,	0},
	{ 0x03,	0},
	{ 0x04,	0},
	{ 0x10, 0},
	{ 0x11, 0},
	{ 0x12, 0},
	{ 0x13, 0},
	{ 0x14, 0},
	{ 0x15, 0},
	{ 0x16, 0},
	{ 0x17, 0},
	{ 0x18, 0},
	{ 0x19, 0},
	{ 0x1A, 0},
	{ 0x20, 0},
	{ 0x21, 0},
	{ 0x22, 0},
	{ 0x23, 0},
	{ 0x24, 0},
	{ 0x25, 0},
	{ 0x26, 0},
	{ 0x27, 0},
	{ 0x28, 0},
	{ 0x30, 0},
	{ 0x31, 0},
	{ 0x32, 0},
	{ 0x33, 0},
	{ 0x34, 0},
	{ 0x35, 0},
	{ 0x36, 0},
	{ 0x37, 0},
	{ 0x38, 0},
	{ 0x39, 0},
	{ 0x40, 0},
	{ 0x41, 0},
};

static bool max98504_volatile_register(struct device *dev, unsigned int reg)
{
	switch (reg) {
	case MAX98504_INTERRUPT_STATUS:
	case MAX98504_INTERRUPT_FLAGS:
	case MAX98504_INTERRUPT_FLAG_CLEARS:
	case MAX98504_WATCHDOG_CLEAR:
	case MAX98504_GLOBAL_ENABLE:
	case MAX98504_SOFTWARE_RESET:
		return true;
	default:
		return false;
	}
}

static bool max98504_readable_register(struct device *dev, unsigned int reg)
{
	switch (reg) {
	case MAX98504_SOFTWARE_RESET:
	case MAX98504_WATCHDOG_CLEAR:
	case MAX98504_INTERRUPT_FLAG_CLEARS:
		return false;
	default:
		return true;
	}
}

static int max98504_pcm_rx_ev(struct snd_soc_dapm_widget *w,
			      struct snd_kcontrol *kcontrol, int event)
{
	struct snd_soc_component *c = snd_soc_dapm_to_component(w->dapm);
	struct max98504_priv *max98504 = snd_soc_component_get_drvdata(c);

	switch (event) {
	case SND_SOC_DAPM_PRE_PMU:
		regmap_write(max98504->regmap, MAX98504_PCM_RX_ENABLE,
			     max98504->pcm_rx_channels);
		break;
	case SND_SOC_DAPM_POST_PMD:
		regmap_write(max98504->regmap, MAX98504_PCM_RX_ENABLE, 0);
		break;
	}

	return 0;
}

static int max98504_component_probe(struct snd_soc_component *c)
{
	struct max98504_priv *max98504 = snd_soc_component_get_drvdata(c);
	struct regmap *map = max98504->regmap;
	int ret;

	ret = regulator_bulk_enable(MAX98504_NUM_SUPPLIES, max98504->supplies);
	if (ret < 0)
		return ret;

	regmap_write(map, MAX98504_SOFTWARE_RESET, 0x1);
	msleep(20);

	if (!max98504->brownout_enable)
		return 0;

	regmap_write(map, MAX98504_PVDD_BROWNOUT_ENABLE, 0x1);

	regmap_write(map, MAX98504_PVDD_BROWNOUT_CONFIG_1,
		     (max98504->brownout_threshold & 0x1f) << 3 |
		     (max98504->brownout_attenuation & 0x3));

	regmap_write(map, MAX98504_PVDD_BROWNOUT_CONFIG_2,
		     max98504->brownout_attack_hold & 0xff);

	regmap_write(map, MAX98504_PVDD_BROWNOUT_CONFIG_3,
		     max98504->brownout_timed_hold & 0xff);

	regmap_write(map, MAX98504_PVDD_BROWNOUT_CONFIG_4,
		     max98504->brownout_release_rate & 0xff);

	return 0;
}

static void max98504_component_remove(struct snd_soc_component *c)
{
	struct max98504_priv *max98504 = snd_soc_component_get_drvdata(c);

	regulator_bulk_disable(MAX98504_NUM_SUPPLIES, max98504->supplies);
}

static const char *spk_source_mux_text[] = {
	"PCM Monomix", "Analog In", "PDM Left", "PDM Right"
};

static const struct soc_enum spk_source_mux_enum =
	SOC_ENUM_SINGLE(MAX98504_SPEAKER_SOURCE_SELECT,
			0, ARRAY_SIZE(spk_source_mux_text),
			spk_source_mux_text);

static const struct snd_kcontrol_new spk_source_mux =
	SOC_DAPM_ENUM("SPK Source", spk_source_mux_enum);

static const struct snd_soc_dapm_route max98504_dapm_routes[] = {
	{ "SPKOUT", NULL, "Global Enable" },
	{ "SPK Source", "PCM Monomix", "DAC PCM" },
	{ "SPK Source", "Analog In", "AIN" },
	{ "SPK Source", "PDM Left", "DAC PDM" },
	{ "SPK Source", "PDM Right", "DAC PDM" },
};

static const struct snd_soc_dapm_widget max98504_dapm_widgets[] = {
	SND_SOC_DAPM_SUPPLY("Global Enable", MAX98504_GLOBAL_ENABLE,
		0, 0, NULL, 0),
	SND_SOC_DAPM_INPUT("AIN"),
	SND_SOC_DAPM_AIF_OUT("AIF2OUTL", "AIF2 Capture", 0, SND_SOC_NOPM, 0, 0),
	SND_SOC_DAPM_AIF_OUT("AIF2OUTR", "AIF2 Capture", 1, SND_SOC_NOPM, 0, 0),
	SND_SOC_DAPM_DAC_E("DAC PCM", NULL, SND_SOC_NOPM, 0, 0,
		max98504_pcm_rx_ev,
		SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
	SND_SOC_DAPM_DAC("DAC PDM", NULL, MAX98504_PDM_RX_ENABLE, 0, 0),
	SND_SOC_DAPM_MUX("SPK Source", SND_SOC_NOPM, 0, 0, &spk_source_mux),
	SND_SOC_DAPM_REG(snd_soc_dapm_spk, "SPKOUT",
		MAX98504_SPEAKER_ENABLE, 0, 1, 1, 0),
};

static int max98504_set_tdm_slot(struct snd_soc_dai *dai,
		unsigned int tx_mask, unsigned int rx_mask,
		int slots, int slot_width)
{
	struct max98504_priv *max98504 = snd_soc_dai_get_drvdata(dai);
	struct regmap *map = max98504->regmap;


	switch (dai->id) {
	case MAX98504_DAI_ID_PCM:
		regmap_write(map, MAX98504_PCM_TX_ENABLE, tx_mask);
		max98504->pcm_rx_channels = rx_mask;
		break;

	case MAX98504_DAI_ID_PDM:
		regmap_write(map, MAX98504_PDM_TX_ENABLE, tx_mask);
		break;
	default:
		WARN_ON(1);
	}

	return 0;
}
static int max98504_set_channel_map(struct snd_soc_dai *dai,
		unsigned int tx_num, unsigned int *tx_slot,
		unsigned int rx_num, unsigned int *rx_slot)
{
	struct max98504_priv *max98504 = snd_soc_dai_get_drvdata(dai);
	struct regmap *map = max98504->regmap;
	unsigned int i, sources = 0;

	for (i = 0; i < tx_num; i++)
		if (tx_slot[i])
			sources |= (1 << i);

	switch (dai->id) {
	case MAX98504_DAI_ID_PCM:
		regmap_write(map, MAX98504_PCM_TX_CHANNEL_SOURCES,
			     sources);
		break;

	case MAX98504_DAI_ID_PDM:
		regmap_write(map, MAX98504_PDM_TX_CONTROL, sources);
		break;
	default:
		WARN_ON(1);
	}

	regmap_write(map, MAX98504_MEASUREMENT_ENABLE, sources ? 0x3 : 0x01);

	return 0;
}

static const struct snd_soc_dai_ops max98504_dai_ops = {
	.set_tdm_slot		= max98504_set_tdm_slot,
	.set_channel_map	= max98504_set_channel_map,
};

#define MAX98504_FORMATS	(SNDRV_PCM_FMTBIT_S8|SNDRV_PCM_FMTBIT_S16_LE|\
				SNDRV_PCM_FMTBIT_S24_LE|SNDRV_PCM_FMTBIT_S32_LE)
#define MAX98504_PDM_RATES	(SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_16000|\
				SNDRV_PCM_RATE_32000|SNDRV_PCM_RATE_44100|\
				SNDRV_PCM_RATE_48000|SNDRV_PCM_RATE_88200|\
				SNDRV_PCM_RATE_96000)

static struct snd_soc_dai_driver max98504_dai[] = {
	/* TODO: Add the PCM interface definitions */
	{
		.name = "max98504-aif2",
		.id = MAX98504_DAI_ID_PDM,
		.playback = {
			.stream_name	= "AIF2 Playback",
			.channels_min	= 1,
			.channels_max	= 2,
			.rates		= MAX98504_PDM_RATES,
			.formats	= MAX98504_FORMATS,
		},
		.capture = {
			.stream_name	= "AIF2 Capture",
			.channels_min	= 1,
			.channels_max	= 2,
			.rates		= MAX98504_PDM_RATES,
			.formats	= MAX98504_FORMATS,
		},
		.ops = &max98504_dai_ops,
	},
};

static const struct snd_soc_component_driver max98504_component_driver = {
	.probe			= max98504_component_probe,
	.remove			= max98504_component_remove,
	.dapm_widgets		= max98504_dapm_widgets,
	.num_dapm_widgets	= ARRAY_SIZE(max98504_dapm_widgets),
	.dapm_routes		= max98504_dapm_routes,
	.num_dapm_routes	= ARRAY_SIZE(max98504_dapm_routes),
};

static const struct regmap_config max98504_regmap = {
	.reg_bits		= 16,
	.val_bits		= 8,
	.max_register		= MAX98504_MAX_REGISTER,
	.reg_defaults		= max98504_reg_defaults,
	.num_reg_defaults	= ARRAY_SIZE(max98504_reg_defaults),
	.volatile_reg		= max98504_volatile_register,
	.readable_reg		= max98504_readable_register,
	.cache_type		= REGCACHE_RBTREE,
};

static int max98504_i2c_probe(struct i2c_client *client,
			      const struct i2c_device_id *id)
{
	struct device *dev = &client->dev;
	struct device_node *node = dev->of_node;
	struct max98504_priv *max98504;
	int i, ret;

	max98504 = devm_kzalloc(dev, sizeof(*max98504), GFP_KERNEL);
	if (!max98504)
		return -ENOMEM;

	if (node) {
		if (!of_property_read_u32(node, "maxim,brownout-threshold",
					&max98504->brownout_threshold))
			max98504->brownout_enable = true;

		of_property_read_u32(node, "maxim,brownout-attenuation",
					&max98504->brownout_attenuation);
		of_property_read_u32(node, "maxim,brownout-attack-hold-ms",
					&max98504->brownout_attack_hold);
		of_property_read_u32(node, "maxim,brownout-timed-hold-ms",
					&max98504->brownout_timed_hold);
		of_property_read_u32(node, "maxim,brownout-release-rate-ms",
					&max98504->brownout_release_rate);
	}

	max98504->regmap = devm_regmap_init_i2c(client, &max98504_regmap);
	if (IS_ERR(max98504->regmap)) {
		ret = PTR_ERR(max98504->regmap);
		dev_err(&client->dev, "regmap initialization failed: %d\n", ret);
		return ret;
	}

	for (i = 0; i < MAX98504_NUM_SUPPLIES; i++)
		max98504->supplies[i].supply = max98504_supply_names[i];

	ret = devm_regulator_bulk_get(dev, MAX98504_NUM_SUPPLIES,
				      max98504->supplies);
	if (ret < 0)
		return ret;

	i2c_set_clientdata(client, max98504);

	return devm_snd_soc_register_component(dev, &max98504_component_driver,
				max98504_dai, ARRAY_SIZE(max98504_dai));
}

#ifdef CONFIG_OF
static const struct of_device_id max98504_of_match[] = {
	{ .compatible = "maxim,max98504" },
	{ },
};
MODULE_DEVICE_TABLE(of, max98504_of_match);
#endif

static const struct i2c_device_id max98504_i2c_id[] = {
	{ "max98504" },
	{ }
};
MODULE_DEVICE_TABLE(i2c, max98504_i2c_id);

static struct i2c_driver max98504_i2c_driver = {
	.driver = {
		.name = "max98504",
		.of_match_table = of_match_ptr(max98504_of_match),
	},
	.probe = max98504_i2c_probe,
	.id_table = max98504_i2c_id,
};
module_i2c_driver(max98504_i2c_driver);

MODULE_DESCRIPTION("ASoC MAX98504 driver");
MODULE_LICENSE("GPL");
OpenPOWER on IntegriCloud