1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * ALSA Soc PCM3008 codec support
4 *
5 * Author:	Hugo Villeneuve
6 * Copyright (C) 2008 Lyrtech inc
7 *
8 * Based on AC97 Soc codec, original copyright follow:
9 * Copyright 2005 Wolfson Microelectronics PLC.
10 *
11 * Generic PCM3008 support.
12 */
13
14#include <linux/init.h>
15#include <linux/kernel.h>
16#include <linux/device.h>
17#include <linux/gpio.h>
18#include <linux/slab.h>
19#include <linux/module.h>
20#include <sound/core.h>
21#include <sound/pcm.h>
22#include <sound/initval.h>
23#include <sound/soc.h>
24
25#include "pcm3008.h"
26
27static int pcm3008_dac_ev(struct snd_soc_dapm_widget *w,
28			  struct snd_kcontrol *kcontrol,
29			  int event)
30{
31	struct snd_soc_component *component = snd_soc_dapm_to_component(w->dapm);
32	struct pcm3008_setup_data *setup = component->dev->platform_data;
33
34	gpio_set_value_cansleep(setup->pdda_pin,
35				SND_SOC_DAPM_EVENT_ON(event));
36
37	return 0;
38}
39
40static int pcm3008_adc_ev(struct snd_soc_dapm_widget *w,
41			  struct snd_kcontrol *kcontrol,
42			  int event)
43{
44	struct snd_soc_component *component = snd_soc_dapm_to_component(w->dapm);
45	struct pcm3008_setup_data *setup = component->dev->platform_data;
46
47	gpio_set_value_cansleep(setup->pdad_pin,
48				SND_SOC_DAPM_EVENT_ON(event));
49
50	return 0;
51}
52
53static const struct snd_soc_dapm_widget pcm3008_dapm_widgets[] = {
54SND_SOC_DAPM_INPUT("VINL"),
55SND_SOC_DAPM_INPUT("VINR"),
56
57SND_SOC_DAPM_DAC_E("DAC", NULL, SND_SOC_NOPM, 0, 0, pcm3008_dac_ev,
58		   SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
59SND_SOC_DAPM_ADC_E("ADC", NULL, SND_SOC_NOPM, 0, 0, pcm3008_adc_ev,
60		   SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
61
62SND_SOC_DAPM_OUTPUT("VOUTL"),
63SND_SOC_DAPM_OUTPUT("VOUTR"),
64};
65
66static const struct snd_soc_dapm_route pcm3008_dapm_routes[] = {
67	{ "PCM3008 Capture", NULL, "ADC" },
68	{ "ADC", NULL, "VINL" },
69	{ "ADC", NULL, "VINR" },
70
71	{ "DAC", NULL, "PCM3008 Playback" },
72	{ "VOUTL", NULL, "DAC" },
73	{ "VOUTR", NULL, "DAC" },
74};
75
76#define PCM3008_RATES (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |	\
77		       SNDRV_PCM_RATE_48000)
78
79static struct snd_soc_dai_driver pcm3008_dai = {
80	.name = "pcm3008-hifi",
81	.playback = {
82		.stream_name = "PCM3008 Playback",
83		.channels_min = 1,
84		.channels_max = 2,
85		.rates = PCM3008_RATES,
86		.formats = SNDRV_PCM_FMTBIT_S16_LE,
87	},
88	.capture = {
89		.stream_name = "PCM3008 Capture",
90		.channels_min = 1,
91		.channels_max = 2,
92		.rates = PCM3008_RATES,
93		.formats = SNDRV_PCM_FMTBIT_S16_LE,
94	},
95};
96
97static const struct snd_soc_component_driver soc_component_dev_pcm3008 = {
98	.dapm_widgets		= pcm3008_dapm_widgets,
99	.num_dapm_widgets	= ARRAY_SIZE(pcm3008_dapm_widgets),
100	.dapm_routes		= pcm3008_dapm_routes,
101	.num_dapm_routes	= ARRAY_SIZE(pcm3008_dapm_routes),
102	.idle_bias_on		= 1,
103	.use_pmdown_time	= 1,
104	.endianness		= 1,
105};
106
107static int pcm3008_codec_probe(struct platform_device *pdev)
108{
109	struct pcm3008_setup_data *setup = pdev->dev.platform_data;
110	int ret;
111
112	if (!setup)
113		return -EINVAL;
114
115	/* DEM1  DEM0  DE-EMPHASIS_MODE
116	 * Low   Low   De-emphasis 44.1 kHz ON
117	 * Low   High  De-emphasis OFF
118	 * High  Low   De-emphasis 48 kHz ON
119	 * High  High  De-emphasis 32 kHz ON
120	 */
121
122	/* Configure DEM0 GPIO (turning OFF DAC De-emphasis). */
123	ret = devm_gpio_request_one(&pdev->dev, setup->dem0_pin,
124				    GPIOF_OUT_INIT_HIGH, "codec_dem0");
125	if (ret != 0)
126		return ret;
127
128	/* Configure DEM1 GPIO (turning OFF DAC De-emphasis). */
129	ret = devm_gpio_request_one(&pdev->dev, setup->dem1_pin,
130				    GPIOF_OUT_INIT_LOW, "codec_dem1");
131	if (ret != 0)
132		return ret;
133
134	/* Configure PDAD GPIO. */
135	ret = devm_gpio_request_one(&pdev->dev, setup->pdad_pin,
136				    GPIOF_OUT_INIT_LOW, "codec_pdad");
137	if (ret != 0)
138		return ret;
139
140	/* Configure PDDA GPIO. */
141	ret = devm_gpio_request_one(&pdev->dev, setup->pdda_pin,
142				    GPIOF_OUT_INIT_LOW, "codec_pdda");
143	if (ret != 0)
144		return ret;
145
146	return devm_snd_soc_register_component(&pdev->dev,
147			&soc_component_dev_pcm3008, &pcm3008_dai, 1);
148}
149
150MODULE_ALIAS("platform:pcm3008-codec");
151
152static struct platform_driver pcm3008_codec_driver = {
153	.probe		= pcm3008_codec_probe,
154	.driver		= {
155		.name	= "pcm3008-codec",
156	},
157};
158
159module_platform_driver(pcm3008_codec_driver);
160
161MODULE_DESCRIPTION("Soc PCM3008 driver");
162MODULE_AUTHOR("Hugo Villeneuve");
163MODULE_LICENSE("GPL");
164