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7#include <linux/acpi.h>
8#include <linux/device.h>
9#include <linux/err.h>
10#include <linux/gpio.h>
11#include <linux/gpio/consumer.h>
12#include <linux/kernel.h>
13#include <linux/mod_devicetable.h>
14#include <linux/module.h>
15#include <linux/of.h>
16#include <linux/platform_device.h>
17#include <sound/pcm.h>
18#include <sound/soc.h>
19#include <sound/soc-dai.h>
20#include <sound/soc-dapm.h>
21
22static int max98357a_daiops_trigger(struct snd_pcm_substream *substream,
23 int cmd, struct snd_soc_dai *dai)
24{
25 struct gpio_desc *sdmode = snd_soc_dai_get_drvdata(dai);
26
27 if (!sdmode)
28 return 0;
29
30 switch (cmd) {
31 case SNDRV_PCM_TRIGGER_START:
32 case SNDRV_PCM_TRIGGER_RESUME:
33 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
34 gpiod_set_value(sdmode, 1);
35 break;
36 case SNDRV_PCM_TRIGGER_STOP:
37 case SNDRV_PCM_TRIGGER_SUSPEND:
38 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
39 gpiod_set_value(sdmode, 0);
40 break;
41 }
42
43 return 0;
44}
45
46static const struct snd_soc_dapm_widget max98357a_dapm_widgets[] = {
47 SND_SOC_DAPM_OUTPUT("Speaker"),
48};
49
50static const struct snd_soc_dapm_route max98357a_dapm_routes[] = {
51 {"Speaker", NULL, "HiFi Playback"},
52};
53
54static int max98357a_component_probe(struct snd_soc_component *component)
55{
56 struct gpio_desc *sdmode;
57
58 sdmode = devm_gpiod_get_optional(component->dev, "sdmode", GPIOD_OUT_LOW);
59 if (IS_ERR(sdmode))
60 return PTR_ERR(sdmode);
61
62 snd_soc_component_set_drvdata(component, sdmode);
63
64 return 0;
65}
66
67static const struct snd_soc_component_driver max98357a_component_driver = {
68 .probe = max98357a_component_probe,
69 .dapm_widgets = max98357a_dapm_widgets,
70 .num_dapm_widgets = ARRAY_SIZE(max98357a_dapm_widgets),
71 .dapm_routes = max98357a_dapm_routes,
72 .num_dapm_routes = ARRAY_SIZE(max98357a_dapm_routes),
73 .idle_bias_on = 1,
74 .use_pmdown_time = 1,
75 .endianness = 1,
76 .non_legacy_dai_naming = 1,
77};
78
79static const struct snd_soc_dai_ops max98357a_dai_ops = {
80 .trigger = max98357a_daiops_trigger,
81};
82
83static struct snd_soc_dai_driver max98357a_dai_driver = {
84 .name = "HiFi",
85 .playback = {
86 .stream_name = "HiFi Playback",
87 .formats = SNDRV_PCM_FMTBIT_S16 |
88 SNDRV_PCM_FMTBIT_S24 |
89 SNDRV_PCM_FMTBIT_S32,
90 .rates = SNDRV_PCM_RATE_8000 |
91 SNDRV_PCM_RATE_16000 |
92 SNDRV_PCM_RATE_32000 |
93 SNDRV_PCM_RATE_44100 |
94 SNDRV_PCM_RATE_48000 |
95 SNDRV_PCM_RATE_88200 |
96 SNDRV_PCM_RATE_96000,
97 .rate_min = 8000,
98 .rate_max = 96000,
99 .channels_min = 1,
100 .channels_max = 2,
101 },
102 .ops = &max98357a_dai_ops,
103};
104
105static int max98357a_platform_probe(struct platform_device *pdev)
106{
107 return devm_snd_soc_register_component(&pdev->dev,
108 &max98357a_component_driver,
109 &max98357a_dai_driver, 1);
110}
111
112static int max98357a_platform_remove(struct platform_device *pdev)
113{
114 return 0;
115}
116
117#ifdef CONFIG_OF
118static const struct of_device_id max98357a_device_id[] = {
119 { .compatible = "maxim,max98357a" },
120 {}
121};
122MODULE_DEVICE_TABLE(of, max98357a_device_id);
123#endif
124
125#ifdef CONFIG_ACPI
126static const struct acpi_device_id max98357a_acpi_match[] = {
127 { "MX98357A", 0 },
128 {},
129};
130MODULE_DEVICE_TABLE(acpi, max98357a_acpi_match);
131#endif
132
133static struct platform_driver max98357a_platform_driver = {
134 .driver = {
135 .name = "max98357a",
136 .of_match_table = of_match_ptr(max98357a_device_id),
137 .acpi_match_table = ACPI_PTR(max98357a_acpi_match),
138 },
139 .probe = max98357a_platform_probe,
140 .remove = max98357a_platform_remove,
141};
142module_platform_driver(max98357a_platform_driver);
143
144MODULE_DESCRIPTION("Maxim MAX98357A Codec Driver");
145MODULE_LICENSE("GPL v2");
146
