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
pcm3008_dac_ev(struct snd_soc_dapm_widget * w,struct snd_kcontrol * kcontrol,int event)27 static 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
pcm3008_adc_ev(struct snd_soc_dapm_widget * w,struct snd_kcontrol * kcontrol,int event)40 static 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
53 static const struct snd_soc_dapm_widget pcm3008_dapm_widgets[] = {
54 SND_SOC_DAPM_INPUT("VINL"),
55 SND_SOC_DAPM_INPUT("VINR"),
56
57 SND_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),
59 SND_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
62 SND_SOC_DAPM_OUTPUT("VOUTL"),
63 SND_SOC_DAPM_OUTPUT("VOUTR"),
64 };
65
66 static 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
79 static 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
97 static 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 .non_legacy_dai_naming = 1,
106 };
107
pcm3008_codec_probe(struct platform_device * pdev)108 static int pcm3008_codec_probe(struct platform_device *pdev)
109 {
110 struct pcm3008_setup_data *setup = pdev->dev.platform_data;
111 int ret;
112
113 if (!setup)
114 return -EINVAL;
115
116 /* DEM1 DEM0 DE-EMPHASIS_MODE
117 * Low Low De-emphasis 44.1 kHz ON
118 * Low High De-emphasis OFF
119 * High Low De-emphasis 48 kHz ON
120 * High High De-emphasis 32 kHz ON
121 */
122
123 /* Configure DEM0 GPIO (turning OFF DAC De-emphasis). */
124 ret = devm_gpio_request_one(&pdev->dev, setup->dem0_pin,
125 GPIOF_OUT_INIT_HIGH, "codec_dem0");
126 if (ret != 0)
127 return ret;
128
129 /* Configure DEM1 GPIO (turning OFF DAC De-emphasis). */
130 ret = devm_gpio_request_one(&pdev->dev, setup->dem1_pin,
131 GPIOF_OUT_INIT_LOW, "codec_dem1");
132 if (ret != 0)
133 return ret;
134
135 /* Configure PDAD GPIO. */
136 ret = devm_gpio_request_one(&pdev->dev, setup->pdad_pin,
137 GPIOF_OUT_INIT_LOW, "codec_pdad");
138 if (ret != 0)
139 return ret;
140
141 /* Configure PDDA GPIO. */
142 ret = devm_gpio_request_one(&pdev->dev, setup->pdda_pin,
143 GPIOF_OUT_INIT_LOW, "codec_pdda");
144 if (ret != 0)
145 return ret;
146
147 return devm_snd_soc_register_component(&pdev->dev,
148 &soc_component_dev_pcm3008, &pcm3008_dai, 1);
149 }
150
151 MODULE_ALIAS("platform:pcm3008-codec");
152
153 static struct platform_driver pcm3008_codec_driver = {
154 .probe = pcm3008_codec_probe,
155 .driver = {
156 .name = "pcm3008-codec",
157 },
158 };
159
160 module_platform_driver(pcm3008_codec_driver);
161
162 MODULE_DESCRIPTION("Soc PCM3008 driver");
163 MODULE_AUTHOR("Hugo Villeneuve");
164 MODULE_LICENSE("GPL");
165