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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");
1/*
2 * ALSA Soc PCM3008 codec support
3 *
4 * Author: Hugo Villeneuve
5 * Copyright (C) 2008 Lyrtech inc
6 *
7 * Based on AC97 Soc codec, original copyright follow:
8 * Copyright 2005 Wolfson Microelectronics PLC.
9 *
10 * This program is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License as published by the
12 * Free Software Foundation; either version 2 of the License, or (at your
13 * option) any later version.
14 *
15 * Generic PCM3008 support.
16 */
17
18#include <linux/init.h>
19#include <linux/kernel.h>
20#include <linux/device.h>
21#include <linux/gpio.h>
22#include <linux/slab.h>
23#include <sound/core.h>
24#include <sound/pcm.h>
25#include <sound/initval.h>
26#include <sound/soc.h>
27
28#include "pcm3008.h"
29
30#define PCM3008_VERSION "0.2"
31
32#define PCM3008_RATES (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \
33 SNDRV_PCM_RATE_48000)
34
35static struct snd_soc_dai_driver pcm3008_dai = {
36 .name = "pcm3008-hifi",
37 .playback = {
38 .stream_name = "PCM3008 Playback",
39 .channels_min = 1,
40 .channels_max = 2,
41 .rates = PCM3008_RATES,
42 .formats = SNDRV_PCM_FMTBIT_S16_LE,
43 },
44 .capture = {
45 .stream_name = "PCM3008 Capture",
46 .channels_min = 1,
47 .channels_max = 2,
48 .rates = PCM3008_RATES,
49 .formats = SNDRV_PCM_FMTBIT_S16_LE,
50 },
51};
52
53static void pcm3008_gpio_free(struct pcm3008_setup_data *setup)
54{
55 gpio_free(setup->dem0_pin);
56 gpio_free(setup->dem1_pin);
57 gpio_free(setup->pdad_pin);
58 gpio_free(setup->pdda_pin);
59}
60
61static int pcm3008_soc_probe(struct snd_soc_codec *codec)
62{
63 struct pcm3008_setup_data *setup = codec->dev->platform_data;
64 int ret = 0;
65
66 printk(KERN_INFO "PCM3008 SoC Audio Codec %s\n", PCM3008_VERSION);
67
68 /* DEM1 DEM0 DE-EMPHASIS_MODE
69 * Low Low De-emphasis 44.1 kHz ON
70 * Low High De-emphasis OFF
71 * High Low De-emphasis 48 kHz ON
72 * High High De-emphasis 32 kHz ON
73 */
74
75 /* Configure DEM0 GPIO (turning OFF DAC De-emphasis). */
76 ret = gpio_request(setup->dem0_pin, "codec_dem0");
77 if (ret == 0)
78 ret = gpio_direction_output(setup->dem0_pin, 1);
79 if (ret != 0)
80 goto gpio_err;
81
82 /* Configure DEM1 GPIO (turning OFF DAC De-emphasis). */
83 ret = gpio_request(setup->dem1_pin, "codec_dem1");
84 if (ret == 0)
85 ret = gpio_direction_output(setup->dem1_pin, 0);
86 if (ret != 0)
87 goto gpio_err;
88
89 /* Configure PDAD GPIO. */
90 ret = gpio_request(setup->pdad_pin, "codec_pdad");
91 if (ret == 0)
92 ret = gpio_direction_output(setup->pdad_pin, 1);
93 if (ret != 0)
94 goto gpio_err;
95
96 /* Configure PDDA GPIO. */
97 ret = gpio_request(setup->pdda_pin, "codec_pdda");
98 if (ret == 0)
99 ret = gpio_direction_output(setup->pdda_pin, 1);
100 if (ret != 0)
101 goto gpio_err;
102
103 return ret;
104
105gpio_err:
106 pcm3008_gpio_free(setup);
107
108 return ret;
109}
110
111static int pcm3008_soc_remove(struct snd_soc_codec *codec)
112{
113 struct pcm3008_setup_data *setup = codec->dev->platform_data;
114
115 pcm3008_gpio_free(setup);
116 return 0;
117}
118
119#ifdef CONFIG_PM
120static int pcm3008_soc_suspend(struct snd_soc_codec *codec, pm_message_t msg)
121{
122 struct pcm3008_setup_data *setup = codec->dev->platform_data;
123
124 gpio_set_value(setup->pdad_pin, 0);
125 gpio_set_value(setup->pdda_pin, 0);
126
127 return 0;
128}
129
130static int pcm3008_soc_resume(struct snd_soc_codec *codec)
131{
132 struct pcm3008_setup_data *setup = codec->dev->platform_data;
133
134 gpio_set_value(setup->pdad_pin, 1);
135 gpio_set_value(setup->pdda_pin, 1);
136
137 return 0;
138}
139#else
140#define pcm3008_soc_suspend NULL
141#define pcm3008_soc_resume NULL
142#endif
143
144static struct snd_soc_codec_driver soc_codec_dev_pcm3008 = {
145 .probe = pcm3008_soc_probe,
146 .remove = pcm3008_soc_remove,
147 .suspend = pcm3008_soc_suspend,
148 .resume = pcm3008_soc_resume,
149};
150
151static int __devinit pcm3008_codec_probe(struct platform_device *pdev)
152{
153 return snd_soc_register_codec(&pdev->dev,
154 &soc_codec_dev_pcm3008, &pcm3008_dai, 1);
155}
156
157static int __devexit pcm3008_codec_remove(struct platform_device *pdev)
158{
159 snd_soc_unregister_codec(&pdev->dev);
160 return 0;
161}
162
163MODULE_ALIAS("platform:pcm3008-codec");
164
165static struct platform_driver pcm3008_codec_driver = {
166 .probe = pcm3008_codec_probe,
167 .remove = __devexit_p(pcm3008_codec_remove),
168 .driver = {
169 .name = "pcm3008-codec",
170 .owner = THIS_MODULE,
171 },
172};
173
174static int __init pcm3008_modinit(void)
175{
176 return platform_driver_register(&pcm3008_codec_driver);
177}
178module_init(pcm3008_modinit);
179
180static void __exit pcm3008_exit(void)
181{
182 platform_driver_unregister(&pcm3008_codec_driver);
183}
184module_exit(pcm3008_exit);
185
186MODULE_DESCRIPTION("Soc PCM3008 driver");
187MODULE_AUTHOR("Hugo Villeneuve");
188MODULE_LICENSE("GPL");