aboutsummaryrefslogtreecommitdiff
path: root/sound/soc/img/pistachio-internal-dac.c
blob: fe181c2e51d65c3f537b73dd884c50c0546043eb (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
// SPDX-License-Identifier: GPL-2.0-only
/*
 * Pistachio internal dac driver
 *
 * Copyright (C) 2015 Imagination Technologies Ltd.
 *
 * Author: Damien Horsley <Damien.Horsley@imgtec.com>
 */

#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/mfd/syscon.h>
#include <linux/module.h>
#include <linux/pm_runtime.h>
#include <linux/regmap.h>
#include <linux/regulator/consumer.h>

#include <sound/pcm_params.h>
#include <sound/soc.h>

#define PISTACHIO_INTERNAL_DAC_CTRL			0x40
#define PISTACHIO_INTERNAL_DAC_CTRL_PWR_SEL_MASK	0x2
#define PISTACHIO_INTERNAL_DAC_CTRL_PWRDN_MASK		0x1

#define PISTACHIO_INTERNAL_DAC_SRST			0x44
#define PISTACHIO_INTERNAL_DAC_SRST_MASK		0x1

#define PISTACHIO_INTERNAL_DAC_GTI_CTRL			0x48
#define PISTACHIO_INTERNAL_DAC_GTI_CTRL_ADDR_SHIFT	0
#define PISTACHIO_INTERNAL_DAC_GTI_CTRL_ADDR_MASK	0xFFF
#define PISTACHIO_INTERNAL_DAC_GTI_CTRL_WE_MASK		0x1000
#define PISTACHIO_INTERNAL_DAC_GTI_CTRL_WDATA_SHIFT	13
#define PISTACHIO_INTERNAL_DAC_GTI_CTRL_WDATA_MASK	0x1FE000

#define PISTACHIO_INTERNAL_DAC_PWR			0x1
#define PISTACHIO_INTERNAL_DAC_PWR_MASK			0x1

#define PISTACHIO_INTERNAL_DAC_FORMATS (SNDRV_PCM_FMTBIT_S24_LE |  \
					SNDRV_PCM_FMTBIT_S32_LE)

/* codec private data */
struct pistachio_internal_dac {
	struct regmap *regmap;
	struct regulator *supply;
	bool mute;
};

static const struct snd_kcontrol_new pistachio_internal_dac_snd_controls[] = {
	SOC_SINGLE("Playback Switch", PISTACHIO_INTERNAL_DAC_CTRL, 2, 1, 1)
};

static const struct snd_soc_dapm_widget pistachio_internal_dac_widgets[] = {
	SND_SOC_DAPM_DAC("DAC", "Playback", SND_SOC_NOPM, 0, 0),
	SND_SOC_DAPM_OUTPUT("AOUTL"),
	SND_SOC_DAPM_OUTPUT("AOUTR"),
};

static const struct snd_soc_dapm_route pistachio_internal_dac_routes[] = {
	{ "AOUTL", NULL, "DAC" },
	{ "AOUTR", NULL, "DAC" },
};

static void pistachio_internal_dac_reg_writel(struct regmap *top_regs,
						u32 val, u32 reg)
{
	regmap_update_bits(top_regs, PISTACHIO_INTERNAL_DAC_GTI_CTRL,
			PISTACHIO_INTERNAL_DAC_GTI_CTRL_ADDR_MASK,
			reg << PISTACHIO_INTERNAL_DAC_GTI_CTRL_ADDR_SHIFT);

	regmap_update_bits(top_regs, PISTACHIO_INTERNAL_DAC_GTI_CTRL,
			PISTACHIO_INTERNAL_DAC_GTI_CTRL_WDATA_MASK,
			val << PISTACHIO_INTERNAL_DAC_GTI_CTRL_WDATA_SHIFT);

	regmap_update_bits(top_regs, PISTACHIO_INTERNAL_DAC_GTI_CTRL,
			PISTACHIO_INTERNAL_DAC_GTI_CTRL_WE_MASK,
			PISTACHIO_INTERNAL_DAC_GTI_CTRL_WE_MASK);

	regmap_update_bits(top_regs, PISTACHIO_INTERNAL_DAC_GTI_CTRL,
			PISTACHIO_INTERNAL_DAC_GTI_CTRL_WE_MASK, 0);
}

static void pistachio_internal_dac_pwr_off(struct pistachio_internal_dac *dac)
{
	regmap_update_bits(dac->regmap, PISTACHIO_INTERNAL_DAC_CTRL,
		PISTACHIO_INTERNAL_DAC_CTRL_PWRDN_MASK,
		PISTACHIO_INTERNAL_DAC_CTRL_PWRDN_MASK);

	pistachio_internal_dac_reg_writel(dac->regmap, 0,
					PISTACHIO_INTERNAL_DAC_PWR);
}

static void pistachio_internal_dac_pwr_on(struct pistachio_internal_dac *dac)
{
	regmap_update_bits(dac->regmap, PISTACHIO_INTERNAL_DAC_SRST,
			PISTACHIO_INTERNAL_DAC_SRST_MASK,
			PISTACHIO_INTERNAL_DAC_SRST_MASK);

	regmap_update_bits(dac->regmap, PISTACHIO_INTERNAL_DAC_SRST,
			PISTACHIO_INTERNAL_DAC_SRST_MASK, 0);

	pistachio_internal_dac_reg_writel(dac->regmap,
					PISTACHIO_INTERNAL_DAC_PWR_MASK,
					PISTACHIO_INTERNAL_DAC_PWR);

	regmap_update_bits(dac->regmap, PISTACHIO_INTERNAL_DAC_CTRL,
			PISTACHIO_INTERNAL_DAC_CTRL_PWRDN_MASK, 0);
}

static struct snd_soc_dai_driver pistachio_internal_dac_dais[] = {
	{
		.name = "pistachio_internal_dac",
		.playback = {
			.stream_name = "Playback",
			.channels_min = 2,
			.channels_max = 2,
			.rates = SNDRV_PCM_RATE_8000_48000,
			.formats = PISTACHIO_INTERNAL_DAC_FORMATS,
		}
	},
};

static int pistachio_internal_dac_codec_probe(struct snd_soc_component *component)
{
	struct pistachio_internal_dac *dac = snd_soc_component_get_drvdata(component);

	snd_soc_component_init_regmap(component, dac->regmap);

	return 0;
}

static const struct snd_soc_component_driver pistachio_internal_dac_driver = {
	.probe			= pistachio_internal_dac_codec_probe,
	.controls		= pistachio_internal_dac_snd_controls,
	.num_controls		= ARRAY_SIZE(pistachio_internal_dac_snd_controls),
	.dapm_widgets		= pistachio_internal_dac_widgets,
	.num_dapm_widgets	= ARRAY_SIZE(pistachio_internal_dac_widgets),
	.dapm_routes		= pistachio_internal_dac_routes,
	.num_dapm_routes	= ARRAY_SIZE(pistachio_internal_dac_routes),
	.use_pmdown_time	= 1,
	.endianness		= 1,
	.non_legacy_dai_naming	= 1,
};

static int pistachio_internal_dac_probe(struct platform_device *pdev)
{
	struct pistachio_internal_dac *dac;
	int ret, voltage;
	struct device *dev = &pdev->dev;
	u32 reg;

	dac = devm_kzalloc(dev, sizeof(*dac), GFP_KERNEL);

	if (!dac)
		return -ENOMEM;

	platform_set_drvdata(pdev, dac);

	dac->regmap = syscon_regmap_lookup_by_phandle(pdev->dev.of_node,
							    "img,cr-top");
	if (IS_ERR(dac->regmap))
		return PTR_ERR(dac->regmap);

	dac->supply = devm_regulator_get(dev, "VDD");
	if (IS_ERR(dac->supply)) {
		ret = PTR_ERR(dac->supply);
		if (ret != -EPROBE_DEFER)
			dev_err(dev, "failed to acquire supply 'VDD-supply': %d\n", ret);
		return ret;
	}

	ret = regulator_enable(dac->supply);
	if (ret) {
		dev_err(dev, "failed to enable supply: %d\n", ret);
		return ret;
	}

	voltage = regulator_get_voltage(dac->supply);

	switch (voltage) {
	case 1800000:
		reg = 0;
		break;
	case 3300000:
		reg = PISTACHIO_INTERNAL_DAC_CTRL_PWR_SEL_MASK;
		break;
	default:
		dev_err(dev, "invalid voltage: %d\n", voltage);
		ret = -EINVAL;
		goto err_regulator;
	}

	regmap_update_bits(dac->regmap, PISTACHIO_INTERNAL_DAC_CTRL,
			PISTACHIO_INTERNAL_DAC_CTRL_PWR_SEL_MASK, reg);

	pistachio_internal_dac_pwr_off(dac);
	pistachio_internal_dac_pwr_on(dac);

	pm_runtime_set_active(dev);
	pm_runtime_enable(dev);
	pm_runtime_idle(dev);

	ret = devm_snd_soc_register_component(dev,
			&pistachio_internal_dac_driver,
			pistachio_internal_dac_dais,
			ARRAY_SIZE(pistachio_internal_dac_dais));
	if (ret) {
		dev_err(dev, "failed to register component: %d\n", ret);
		goto err_pwr;
	}

	return 0;

err_pwr:
	pm_runtime_disable(&pdev->dev);
	pistachio_internal_dac_pwr_off(dac);
err_regulator:
	regulator_disable(dac->supply);

	return ret;
}

static int pistachio_internal_dac_remove(struct platform_device *pdev)
{
	struct pistachio_internal_dac *dac = dev_get_drvdata(&pdev->dev);

	pm_runtime_disable(&pdev->dev);
	pistachio_internal_dac_pwr_off(dac);
	regulator_disable(dac->supply);

	return 0;
}

#ifdef CONFIG_PM
static int pistachio_internal_dac_rt_resume(struct device *dev)
{
	struct pistachio_internal_dac *dac = dev_get_drvdata(dev);
	int ret;

	ret = regulator_enable(dac->supply);
	if (ret) {
		dev_err(dev, "failed to enable supply: %d\n", ret);
		return ret;
	}

	pistachio_internal_dac_pwr_on(dac);

	return 0;
}

static int pistachio_internal_dac_rt_suspend(struct device *dev)
{
	struct pistachio_internal_dac *dac = dev_get_drvdata(dev);

	pistachio_internal_dac_pwr_off(dac);

	regulator_disable(dac->supply);

	return 0;
}
#endif

static const struct dev_pm_ops pistachio_internal_dac_pm_ops = {
	SET_RUNTIME_PM_OPS(pistachio_internal_dac_rt_suspend,
			pistachio_internal_dac_rt_resume, NULL)
};

static const struct of_device_id pistachio_internal_dac_of_match[] = {
	{ .compatible = "img,pistachio-internal-dac" },
	{}
};
MODULE_DEVICE_TABLE(of, pistachio_internal_dac_of_match);

static struct platform_driver pistachio_internal_dac_plat_driver = {
	.driver = {
		.name = "img-pistachio-internal-dac",
		.of_match_table = pistachio_internal_dac_of_match,
		.pm = &pistachio_internal_dac_pm_ops
	},
	.probe = pistachio_internal_dac_probe,
	.remove = pistachio_internal_dac_remove
};
module_platform_driver(pistachio_internal_dac_plat_driver);

MODULE_DESCRIPTION("Pistachio Internal DAC driver");
MODULE_AUTHOR("Damien Horsley <Damien.Horsley@imgtec.com>");
MODULE_LICENSE("GPL v2");