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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 | ||
08d0a55c KW |
15 | #include <linux/device.h> |
16 | #include <linux/err.h> | |
af5adf12 | 17 | #include <linux/gpio.h> |
5c8be987 | 18 | #include <linux/gpio/consumer.h> |
08d0a55c KW |
19 | #include <linux/kernel.h> |
20 | #include <linux/mod_devicetable.h> | |
21 | #include <linux/module.h> | |
22 | #include <linux/of.h> | |
23 | #include <linux/platform_device.h> | |
24 | #include <sound/pcm.h> | |
af5adf12 | 25 | #include <sound/soc.h> |
08d0a55c KW |
26 | #include <sound/soc-dai.h> |
27 | #include <sound/soc-dapm.h> | |
af5adf12 | 28 | |
af5adf12 KW |
29 | static int max98357a_daiops_trigger(struct snd_pcm_substream *substream, |
30 | int cmd, struct snd_soc_dai *dai) | |
31 | { | |
32 | struct gpio_desc *sdmode = snd_soc_dai_get_drvdata(dai); | |
33 | ||
5119222f AP |
34 | if (!sdmode) |
35 | return 0; | |
36 | ||
af5adf12 KW |
37 | switch (cmd) { |
38 | case SNDRV_PCM_TRIGGER_START: | |
39 | case SNDRV_PCM_TRIGGER_RESUME: | |
40 | case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: | |
41 | gpiod_set_value(sdmode, 1); | |
42 | break; | |
43 | case SNDRV_PCM_TRIGGER_STOP: | |
44 | case SNDRV_PCM_TRIGGER_SUSPEND: | |
45 | case SNDRV_PCM_TRIGGER_PAUSE_PUSH: | |
46 | gpiod_set_value(sdmode, 0); | |
47 | break; | |
48 | } | |
49 | ||
50 | return 0; | |
51 | } | |
52 | ||
53 | static const struct snd_soc_dapm_widget max98357a_dapm_widgets[] = { | |
af5adf12 KW |
54 | SND_SOC_DAPM_OUTPUT("Speaker"), |
55 | }; | |
56 | ||
57 | static const struct snd_soc_dapm_route max98357a_dapm_routes[] = { | |
508e6195 | 58 | {"Speaker", NULL, "HiFi Playback"}, |
af5adf12 KW |
59 | }; |
60 | ||
61 | static int max98357a_codec_probe(struct snd_soc_codec *codec) | |
62 | { | |
63 | struct gpio_desc *sdmode; | |
64 | ||
5119222f | 65 | sdmode = devm_gpiod_get_optional(codec->dev, "sdmode", GPIOD_OUT_LOW); |
4ab0c591 | 66 | if (IS_ERR(sdmode)) |
af5adf12 | 67 | return PTR_ERR(sdmode); |
4ab0c591 | 68 | |
af5adf12 KW |
69 | snd_soc_codec_set_drvdata(codec, sdmode); |
70 | ||
71 | return 0; | |
72 | } | |
73 | ||
74 | static struct snd_soc_codec_driver max98357a_codec_driver = { | |
75 | .probe = max98357a_codec_probe, | |
76 | .dapm_widgets = max98357a_dapm_widgets, | |
77 | .num_dapm_widgets = ARRAY_SIZE(max98357a_dapm_widgets), | |
78 | .dapm_routes = max98357a_dapm_routes, | |
79 | .num_dapm_routes = ARRAY_SIZE(max98357a_dapm_routes), | |
80 | }; | |
81 | ||
64793047 | 82 | static const struct snd_soc_dai_ops max98357a_dai_ops = { |
af5adf12 KW |
83 | .trigger = max98357a_daiops_trigger, |
84 | }; | |
85 | ||
86 | static struct snd_soc_dai_driver max98357a_dai_driver = { | |
92b2ad2c | 87 | .name = "HiFi", |
af5adf12 | 88 | .playback = { |
92b2ad2c | 89 | .stream_name = "HiFi Playback", |
af5adf12 KW |
90 | .formats = SNDRV_PCM_FMTBIT_S16 | |
91 | SNDRV_PCM_FMTBIT_S24 | | |
92 | SNDRV_PCM_FMTBIT_S32, | |
93 | .rates = SNDRV_PCM_RATE_8000 | | |
94 | SNDRV_PCM_RATE_16000 | | |
95 | SNDRV_PCM_RATE_48000 | | |
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 | ||
105 | static int max98357a_platform_probe(struct platform_device *pdev) | |
106 | { | |
4ab0c591 | 107 | return snd_soc_register_codec(&pdev->dev, &max98357a_codec_driver, |
af5adf12 | 108 | &max98357a_dai_driver, 1); |
af5adf12 KW |
109 | } |
110 | ||
111 | static int max98357a_platform_remove(struct platform_device *pdev) | |
112 | { | |
113 | snd_soc_unregister_codec(&pdev->dev); | |
114 | ||
115 | return 0; | |
116 | } | |
117 | ||
118 | #ifdef CONFIG_OF | |
119 | static const struct of_device_id max98357a_device_id[] = { | |
7ff5eabc | 120 | { .compatible = "maxim,max98357a" }, |
af5adf12 KW |
121 | {} |
122 | }; | |
3efa130d | 123 | MODULE_DEVICE_TABLE(of, max98357a_device_id); |
af5adf12 KW |
124 | #endif |
125 | ||
126 | static struct platform_driver max98357a_platform_driver = { | |
127 | .driver = { | |
7ff5eabc | 128 | .name = "max98357a", |
af5adf12 KW |
129 | .of_match_table = of_match_ptr(max98357a_device_id), |
130 | }, | |
131 | .probe = max98357a_platform_probe, | |
132 | .remove = max98357a_platform_remove, | |
133 | }; | |
134 | module_platform_driver(max98357a_platform_driver); | |
135 | ||
136 | MODULE_DESCRIPTION("Maxim MAX98357A Codec Driver"); | |
137 | MODULE_LICENSE("GPL v2"); |