summaryrefslogtreecommitdiffstats
path: root/sound/soc/codecs/wm8728.c
blob: 8b876659f29cc90e3afe99992002e42f99e8306a (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
// SPDX-License-Identifier: GPL-2.0-only
/*
 * wm8728.c  --  WM8728 ALSA SoC Audio driver
 *
 * Copyright 2008 Wolfson Microelectronics plc
 *
 * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
 */

#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/pm.h>
#include <linux/i2c.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/spi/spi.h>
#include <linux/slab.h>
#include <linux/of_device.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/initval.h>
#include <sound/tlv.h>

#include "wm8728.h"

/*
 * We can't read the WM8728 register space so we cache them instead.
 * Note that the defaults here aren't the physical defaults, we latch
 * the volume update bits, mute the output and enable infinite zero
 * detect.
 */
static const struct reg_default wm8728_reg_defaults[] = {
	{ 0, 0x1ff },
	{ 1, 0x1ff },
	{ 2, 0x001 },
	{ 3, 0x100 },
};

/* codec private data */
struct wm8728_priv {
	struct regmap *regmap;
};

static const DECLARE_TLV_DB_SCALE(wm8728_tlv, -12750, 50, 1);

static const struct snd_kcontrol_new wm8728_snd_controls[] = {

SOC_DOUBLE_R_TLV("Digital Playback Volume", WM8728_DACLVOL, WM8728_DACRVOL,
		 0, 255, 0, wm8728_tlv),

SOC_SINGLE("Deemphasis", WM8728_DACCTL, 1, 1, 0),
};

/*
 * DAPM controls.
 */
static const struct snd_soc_dapm_widget wm8728_dapm_widgets[] = {
SND_SOC_DAPM_DAC("DAC", "HiFi Playback", SND_SOC_NOPM, 0, 0),
SND_SOC_DAPM_OUTPUT("VOUTL"),
SND_SOC_DAPM_OUTPUT("VOUTR"),
};

static const struct snd_soc_dapm_route wm8728_intercon[] = {
	{"VOUTL", NULL, "DAC"},
	{"VOUTR", NULL, "DAC"},
};

static int wm8728_mute(struct snd_soc_dai *dai, int mute)
{
	struct snd_soc_component *component = dai->component;
	u16 mute_reg = snd_soc_component_read32(component, WM8728_DACCTL);

	if (mute)
		snd_soc_component_write(component, WM8728_DACCTL, mute_reg | 1);
	else
		snd_soc_component_write(component, WM8728_DACCTL, mute_reg & ~1);

	return 0;
}

static int wm8728_hw_params(struct snd_pcm_substream *substream,
	struct snd_pcm_hw_params *params,
	struct snd_soc_dai *dai)
{
	struct snd_soc_component *component = dai->component;
	u16 dac = snd_soc_component_read32(component, WM8728_DACCTL);

	dac &= ~0x18;

	switch (params_width(params)) {
	case 16:
		break;
	case 20:
		dac |= 0x10;
		break;
	case 24:
		dac |= 0x08;
		break;
	default:
		return -EINVAL;
	}

	snd_soc_component_write(component, WM8728_DACCTL, dac);

	return 0;
}

static int wm8728_set_dai_fmt(struct snd_soc_dai *codec_dai,
		unsigned int fmt)
{
	struct snd_soc_component *component = codec_dai->component;
	u16 iface = snd_soc_component_read32(component, WM8728_IFCTL);

	/* Currently only I2S is supported by the driver, though the
	 * hardware is more flexible.
	 */
	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
	case SND_SOC_DAIFMT_I2S:
		iface |= 1;
		break;
	default:
		return -EINVAL;
	}

	/* The hardware only support full slave mode */
	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
	case SND_SOC_DAIFMT_CBS_CFS:
		break;
	default:
		return -EINVAL;
	}

	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
	case SND_SOC_DAIFMT_NB_NF:
		iface &= ~0x22;
		break;
	case SND_SOC_DAIFMT_IB_NF:
		iface |=  0x20;
		iface &= ~0x02;
		break;
	case SND_SOC_DAIFMT_NB_IF:
		iface |= 0x02;
		iface &= ~0x20;
		break;
	case SND_SOC_DAIFMT_IB_IF:
		iface |= 0x22;
		break;
	default:
		return -EINVAL;
	}

	snd_soc_component_write(component, WM8728_IFCTL, iface);
	return 0;
}

static int wm8728_set_bias_level(struct snd_soc_component *component,
				 enum snd_soc_bias_level level)
{
	struct wm8728_priv *wm8728 = snd_soc_component_get_drvdata(component);
	u16 reg;

	switch (level) {
	case SND_SOC_BIAS_ON:
	case SND_SOC_BIAS_PREPARE:
	case SND_SOC_BIAS_STANDBY:
		if (snd_soc_component_get_bias_level(component) == SND_SOC_BIAS_OFF) {
			/* Power everything up... */
			reg = snd_soc_component_read32(component, WM8728_DACCTL);
			snd_soc_component_write(component, WM8728_DACCTL, reg & ~0x4);

			/* ..then sync in the register cache. */
			regcache_sync(wm8728->regmap);
		}
		break;

	case SND_SOC_BIAS_OFF:
		reg = snd_soc_component_read32(component, WM8728_DACCTL);
		snd_soc_component_write(component, WM8728_DACCTL, reg | 0x4);
		break;
	}
	return 0;
}

#define WM8728_RATES (SNDRV_PCM_RATE_8000_192000)

#define WM8728_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
	SNDRV_PCM_FMTBIT_S24_LE)

static const struct snd_soc_dai_ops wm8728_dai_ops = {
	.hw_params	= wm8728_hw_params,
	.digital_mute	= wm8728_mute,
	.set_fmt	= wm8728_set_dai_fmt,
};

static struct snd_soc_dai_driver wm8728_dai = {
	.name = "wm8728-hifi",
	.playback = {
		.stream_name = "Playback",
		.channels_min = 2,
		.channels_max = 2,
		.rates = WM8728_RATES,
		.formats = WM8728_FORMATS,
	},
	.ops = &wm8728_dai_ops,
};

static const struct snd_soc_component_driver soc_component_dev_wm8728 = {
	.set_bias_level		= wm8728_set_bias_level,
	.controls		= wm8728_snd_controls,
	.num_controls		= ARRAY_SIZE(wm8728_snd_controls),
	.dapm_widgets		= wm8728_dapm_widgets,
	.num_dapm_widgets	= ARRAY_SIZE(wm8728_dapm_widgets),
	.dapm_routes		= wm8728_intercon,
	.num_dapm_routes	= ARRAY_SIZE(wm8728_intercon),
	.suspend_bias_off	= 1,
	.idle_bias_on		= 1,
	.use_pmdown_time	= 1,
	.endianness		= 1,
	.non_legacy_dai_naming	= 1,
};

static const struct of_device_id wm8728_of_match[] = {
	{ .compatible = "wlf,wm8728", },
	{ }
};
MODULE_DEVICE_TABLE(of, wm8728_of_match);

static const struct regmap_config wm8728_regmap = {
	.reg_bits = 7,
	.val_bits = 9,
	.max_register = WM8728_IFCTL,

	.reg_defaults = wm8728_reg_defaults,
	.num_reg_defaults = ARRAY_SIZE(wm8728_reg_defaults),
	.cache_type = REGCACHE_RBTREE,
};

#if defined(CONFIG_SPI_MASTER)
static int wm8728_spi_probe(struct spi_device *spi)
{
	struct wm8728_priv *wm8728;
	int ret;

	wm8728 = devm_kzalloc(&spi->dev, sizeof(struct wm8728_priv),
			      GFP_KERNEL);
	if (wm8728 == NULL)
		return -ENOMEM;

	wm8728->regmap = devm_regmap_init_spi(spi, &wm8728_regmap);
	if (IS_ERR(wm8728->regmap))
		return PTR_ERR(wm8728->regmap);

	spi_set_drvdata(spi, wm8728);

	ret = devm_snd_soc_register_component(&spi->dev,
			&soc_component_dev_wm8728, &wm8728_dai, 1);

	return ret;
}

static struct spi_driver wm8728_spi_driver = {
	.driver = {
		.name	= "wm8728",
		.of_match_table = wm8728_of_match,
	},
	.probe		= wm8728_spi_probe,
};
#endif /* CONFIG_SPI_MASTER */

#if IS_ENABLED(CONFIG_I2C)
static int wm8728_i2c_probe(struct i2c_client *i2c,
			    const struct i2c_device_id *id)
{
	struct wm8728_priv *wm8728;
	int ret;

	wm8728 = devm_kzalloc(&i2c->dev, sizeof(struct wm8728_priv),
			      GFP_KERNEL);
	if (wm8728 == NULL)
		return -ENOMEM;

	wm8728->regmap = devm_regmap_init_i2c(i2c, &wm8728_regmap);
	if (IS_ERR(wm8728->regmap))
		return PTR_ERR(wm8728->regmap);

	i2c_set_clientdata(i2c, wm8728);

	ret =  devm_snd_soc_register_component(&i2c->dev,
			&soc_component_dev_wm8728, &wm8728_dai, 1);

	return ret;
}

static const struct i2c_device_id wm8728_i2c_id[] = {
	{ "wm8728", 0 },
	{ }
};
MODULE_DEVICE_TABLE(i2c, wm8728_i2c_id);

static struct i2c_driver wm8728_i2c_driver = {
	.driver = {
		.name = "wm8728",
		.of_match_table = wm8728_of_match,
	},
	.probe =    wm8728_i2c_probe,
	.id_table = wm8728_i2c_id,
};
#endif

static int __init wm8728_modinit(void)
{
	int ret = 0;
#if IS_ENABLED(CONFIG_I2C)
	ret = i2c_add_driver(&wm8728_i2c_driver);
	if (ret != 0) {
		printk(KERN_ERR "Failed to register wm8728 I2C driver: %d\n",
		       ret);
	}
#endif
#if defined(CONFIG_SPI_MASTER)
	ret = spi_register_driver(&wm8728_spi_driver);
	if (ret != 0) {
		printk(KERN_ERR "Failed to register wm8728 SPI driver: %d\n",
		       ret);
	}
#endif
	return ret;
}
module_init(wm8728_modinit);

static void __exit wm8728_exit(void)
{
#if IS_ENABLED(CONFIG_I2C)
	i2c_del_driver(&wm8728_i2c_driver);
#endif
#if defined(CONFIG_SPI_MASTER)
	spi_unregister_driver(&wm8728_spi_driver);
#endif
}
module_exit(wm8728_exit);

MODULE_DESCRIPTION("ASoC WM8728 driver");
MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
MODULE_LICENSE("GPL");