GNU Linux-libre 4.14.262-gnu1
[releases.git] / sound / soc / codecs / max98357a.c
1 /* Copyright (c) 2010-2011,2013-2015 The Linux Foundation. All rights reserved.
2  *
3  * This program is free software; you can redistribute it and/or modify
4  * it under the terms of the GNU General Public License version 2 and
5  * only version 2 as published by the Free Software Foundation.
6  *
7  * This program is distributed in the hope that it will be useful,
8  * but WITHOUT ANY WARRANTY; without even the implied warranty of
9  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
10  * GNU General Public License for more details.
11  *
12  * max98357a.c -- MAX98357A ALSA SoC Codec driver
13  */
14
15 #include <linux/acpi.h>
16 #include <linux/device.h>
17 #include <linux/err.h>
18 #include <linux/gpio.h>
19 #include <linux/gpio/consumer.h>
20 #include <linux/kernel.h>
21 #include <linux/mod_devicetable.h>
22 #include <linux/module.h>
23 #include <linux/of.h>
24 #include <linux/platform_device.h>
25 #include <sound/pcm.h>
26 #include <sound/soc.h>
27 #include <sound/soc-dai.h>
28 #include <sound/soc-dapm.h>
29
30 static int max98357a_daiops_trigger(struct snd_pcm_substream *substream,
31                 int cmd, struct snd_soc_dai *dai)
32 {
33         struct gpio_desc *sdmode = snd_soc_dai_get_drvdata(dai);
34
35         if (!sdmode)
36                 return 0;
37
38         switch (cmd) {
39         case SNDRV_PCM_TRIGGER_START:
40         case SNDRV_PCM_TRIGGER_RESUME:
41         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
42                 gpiod_set_value(sdmode, 1);
43                 break;
44         case SNDRV_PCM_TRIGGER_STOP:
45         case SNDRV_PCM_TRIGGER_SUSPEND:
46         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
47                 gpiod_set_value(sdmode, 0);
48                 break;
49         }
50
51         return 0;
52 }
53
54 static const struct snd_soc_dapm_widget max98357a_dapm_widgets[] = {
55         SND_SOC_DAPM_OUTPUT("Speaker"),
56 };
57
58 static const struct snd_soc_dapm_route max98357a_dapm_routes[] = {
59         {"Speaker", NULL, "HiFi Playback"},
60 };
61
62 static int max98357a_codec_probe(struct snd_soc_codec *codec)
63 {
64         struct gpio_desc *sdmode;
65
66         sdmode = devm_gpiod_get_optional(codec->dev, "sdmode", GPIOD_OUT_LOW);
67         if (IS_ERR(sdmode))
68                 return PTR_ERR(sdmode);
69
70         snd_soc_codec_set_drvdata(codec, sdmode);
71
72         return 0;
73 }
74
75 static const struct snd_soc_codec_driver max98357a_codec_driver = {
76         .probe                  = max98357a_codec_probe,
77         .component_driver = {
78                 .dapm_widgets           = max98357a_dapm_widgets,
79                 .num_dapm_widgets       = ARRAY_SIZE(max98357a_dapm_widgets),
80                 .dapm_routes            = max98357a_dapm_routes,
81                 .num_dapm_routes        = ARRAY_SIZE(max98357a_dapm_routes),
82         },
83 };
84
85 static const struct snd_soc_dai_ops max98357a_dai_ops = {
86         .trigger        = max98357a_daiops_trigger,
87 };
88
89 static struct snd_soc_dai_driver max98357a_dai_driver = {
90         .name = "HiFi",
91         .playback = {
92                 .stream_name    = "HiFi Playback",
93                 .formats        = SNDRV_PCM_FMTBIT_S16 |
94                                         SNDRV_PCM_FMTBIT_S24 |
95                                         SNDRV_PCM_FMTBIT_S32,
96                 .rates          = SNDRV_PCM_RATE_8000 |
97                                         SNDRV_PCM_RATE_16000 |
98                                         SNDRV_PCM_RATE_48000 |
99                                         SNDRV_PCM_RATE_96000,
100                 .rate_min       = 8000,
101                 .rate_max       = 96000,
102                 .channels_min   = 1,
103                 .channels_max   = 2,
104         },
105         .ops    = &max98357a_dai_ops,
106 };
107
108 static int max98357a_platform_probe(struct platform_device *pdev)
109 {
110         return snd_soc_register_codec(&pdev->dev, &max98357a_codec_driver,
111                         &max98357a_dai_driver, 1);
112 }
113
114 static int max98357a_platform_remove(struct platform_device *pdev)
115 {
116         snd_soc_unregister_codec(&pdev->dev);
117
118         return 0;
119 }
120
121 #ifdef CONFIG_OF
122 static const struct of_device_id max98357a_device_id[] = {
123         { .compatible = "maxim,max98357a" },
124         {}
125 };
126 MODULE_DEVICE_TABLE(of, max98357a_device_id);
127 #endif
128
129 #ifdef CONFIG_ACPI
130 static const struct acpi_device_id max98357a_acpi_match[] = {
131         { "MX98357A", 0 },
132         {},
133 };
134 MODULE_DEVICE_TABLE(acpi, max98357a_acpi_match);
135 #endif
136
137 static struct platform_driver max98357a_platform_driver = {
138         .driver = {
139                 .name = "max98357a",
140                 .of_match_table = of_match_ptr(max98357a_device_id),
141                 .acpi_match_table = ACPI_PTR(max98357a_acpi_match),
142         },
143         .probe  = max98357a_platform_probe,
144         .remove = max98357a_platform_remove,
145 };
146 module_platform_driver(max98357a_platform_driver);
147
148 MODULE_DESCRIPTION("Maxim MAX98357A Codec Driver");
149 MODULE_LICENSE("GPL v2");