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af5adf12 KW |
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 | ||
5c27087e | 15 | #include <linux/acpi.h> |
08d0a55c KW |
16 | #include <linux/device.h> |
17 | #include <linux/err.h> | |
af5adf12 | 18 | #include <linux/gpio.h> |
5c8be987 | 19 | #include <linux/gpio/consumer.h> |
08d0a55c KW |
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> | |
af5adf12 | 26 | #include <sound/soc.h> |
08d0a55c KW |
27 | #include <sound/soc-dai.h> |
28 | #include <sound/soc-dapm.h> | |
af5adf12 | 29 | |
af5adf12 KW |
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 | ||
5119222f AP |
35 | if (!sdmode) |
36 | return 0; | |
37 | ||
af5adf12 KW |
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[] = { | |
af5adf12 KW |
55 | SND_SOC_DAPM_OUTPUT("Speaker"), |
56 | }; | |
57 | ||
58 | static const struct snd_soc_dapm_route max98357a_dapm_routes[] = { | |
508e6195 | 59 | {"Speaker", NULL, "HiFi Playback"}, |
af5adf12 KW |
60 | }; |
61 | ||
62 | static int max98357a_codec_probe(struct snd_soc_codec *codec) | |
63 | { | |
64 | struct gpio_desc *sdmode; | |
65 | ||
5119222f | 66 | sdmode = devm_gpiod_get_optional(codec->dev, "sdmode", GPIOD_OUT_LOW); |
4ab0c591 | 67 | if (IS_ERR(sdmode)) |
af5adf12 | 68 | return PTR_ERR(sdmode); |
4ab0c591 | 69 | |
af5adf12 KW |
70 | snd_soc_codec_set_drvdata(codec, sdmode); |
71 | ||
72 | return 0; | |
73 | } | |
74 | ||
75 | static struct snd_soc_codec_driver max98357a_codec_driver = { | |
76 | .probe = max98357a_codec_probe, | |
77 | .dapm_widgets = max98357a_dapm_widgets, | |
78 | .num_dapm_widgets = ARRAY_SIZE(max98357a_dapm_widgets), | |
79 | .dapm_routes = max98357a_dapm_routes, | |
80 | .num_dapm_routes = ARRAY_SIZE(max98357a_dapm_routes), | |
81 | }; | |
82 | ||
64793047 | 83 | static const struct snd_soc_dai_ops max98357a_dai_ops = { |
af5adf12 KW |
84 | .trigger = max98357a_daiops_trigger, |
85 | }; | |
86 | ||
87 | static struct snd_soc_dai_driver max98357a_dai_driver = { | |
92b2ad2c | 88 | .name = "HiFi", |
af5adf12 | 89 | .playback = { |
92b2ad2c | 90 | .stream_name = "HiFi Playback", |
af5adf12 KW |
91 | .formats = SNDRV_PCM_FMTBIT_S16 | |
92 | SNDRV_PCM_FMTBIT_S24 | | |
93 | SNDRV_PCM_FMTBIT_S32, | |
94 | .rates = SNDRV_PCM_RATE_8000 | | |
95 | SNDRV_PCM_RATE_16000 | | |
96 | SNDRV_PCM_RATE_48000 | | |
97 | SNDRV_PCM_RATE_96000, | |
98 | .rate_min = 8000, | |
99 | .rate_max = 96000, | |
100 | .channels_min = 1, | |
101 | .channels_max = 2, | |
102 | }, | |
103 | .ops = &max98357a_dai_ops, | |
104 | }; | |
105 | ||
106 | static int max98357a_platform_probe(struct platform_device *pdev) | |
107 | { | |
4ab0c591 | 108 | return snd_soc_register_codec(&pdev->dev, &max98357a_codec_driver, |
af5adf12 | 109 | &max98357a_dai_driver, 1); |
af5adf12 KW |
110 | } |
111 | ||
112 | static int max98357a_platform_remove(struct platform_device *pdev) | |
113 | { | |
114 | snd_soc_unregister_codec(&pdev->dev); | |
115 | ||
116 | return 0; | |
117 | } | |
118 | ||
119 | #ifdef CONFIG_OF | |
120 | static const struct of_device_id max98357a_device_id[] = { | |
7ff5eabc | 121 | { .compatible = "maxim,max98357a" }, |
af5adf12 KW |
122 | {} |
123 | }; | |
3efa130d | 124 | MODULE_DEVICE_TABLE(of, max98357a_device_id); |
af5adf12 KW |
125 | #endif |
126 | ||
5c27087e RA |
127 | #ifdef CONFIG_ACPI |
128 | static const struct acpi_device_id max98357a_acpi_match[] = { | |
129 | { "MX98357A", 0 }, | |
130 | {}, | |
131 | }; | |
132 | MODULE_DEVICE_TABLE(acpi, max98357a_acpi_match); | |
133 | #endif | |
134 | ||
af5adf12 KW |
135 | static struct platform_driver max98357a_platform_driver = { |
136 | .driver = { | |
7ff5eabc | 137 | .name = "max98357a", |
af5adf12 | 138 | .of_match_table = of_match_ptr(max98357a_device_id), |
5c27087e | 139 | .acpi_match_table = ACPI_PTR(max98357a_acpi_match), |
af5adf12 KW |
140 | }, |
141 | .probe = max98357a_platform_probe, | |
142 | .remove = max98357a_platform_remove, | |
143 | }; | |
144 | module_platform_driver(max98357a_platform_driver); | |
145 | ||
146 | MODULE_DESCRIPTION("Maxim MAX98357A Codec Driver"); | |
147 | MODULE_LICENSE("GPL v2"); |