projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 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 | ||
| 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 KW |
28 | |
| 29 | #define DRV_NAME "max98357a" | |
| 30 | ||
| 31 | static int max98357a_daiops_trigger(struct snd_pcm_substream *substream, | |
| 32 | int cmd, struct snd_soc_dai *dai) | |
| 33 | { | |
| 34 | struct gpio_desc *sdmode = snd_soc_dai_get_drvdata(dai); | |
| 35 | ||
| 36 | switch (cmd) { | |
| 37 | case SNDRV_PCM_TRIGGER_START: | |
| 38 | case SNDRV_PCM_TRIGGER_RESUME: | |
| 39 | case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: | |
| 40 | gpiod_set_value(sdmode, 1); | |
| 41 | break; | |
| 42 | case SNDRV_PCM_TRIGGER_STOP: | |
| 43 | case SNDRV_PCM_TRIGGER_SUSPEND: | |
| 44 | case SNDRV_PCM_TRIGGER_PAUSE_PUSH: | |
| 45 | gpiod_set_value(sdmode, 0); | |
| 46 | break; | |
| 47 | } | |
| 48 | ||
| 49 | return 0; | |
| 50 | } | |
| 51 | ||
| 52 | static const struct snd_soc_dapm_widget max98357a_dapm_widgets[] = { | |
| 53 | SND_SOC_DAPM_DAC("SDMode", NULL, SND_SOC_NOPM, 0, 0), | |
| 54 | SND_SOC_DAPM_OUTPUT("Speaker"), | |
| 55 | }; | |
| 56 | ||
| 57 | static const struct snd_soc_dapm_route max98357a_dapm_routes[] = { | |
| 58 | {"Speaker", NULL, "SDMode"}, | |
| 59 | }; | |
| 60 | ||
| 61 | static int max98357a_codec_probe(struct snd_soc_codec *codec) | |
| 62 | { | |
| 63 | struct gpio_desc *sdmode; | |
| 64 | ||
| 65 | sdmode = devm_gpiod_get(codec->dev, "sdmode"); | |
| 66 | if (IS_ERR(sdmode)) { | |
| 67 | dev_err(codec->dev, "%s() unable to get sdmode GPIO: %ld\n", | |
| 68 | __func__, PTR_ERR(sdmode)); | |
| 69 | return PTR_ERR(sdmode); | |
| 70 | } | |
| 71 | gpiod_direction_output(sdmode, 0); | |
| 72 | snd_soc_codec_set_drvdata(codec, sdmode); | |
| 73 | ||
| 74 | return 0; | |
| 75 | } | |
| 76 | ||
| 77 | static struct snd_soc_codec_driver max98357a_codec_driver = { | |
| 78 | .probe = max98357a_codec_probe, | |
| 79 | .dapm_widgets = max98357a_dapm_widgets, | |
| 80 | .num_dapm_widgets = ARRAY_SIZE(max98357a_dapm_widgets), | |
| 81 | .dapm_routes = max98357a_dapm_routes, | |
| 82 | .num_dapm_routes = ARRAY_SIZE(max98357a_dapm_routes), | |
| 83 | }; | |
| 84 | ||
| 85 | static 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 = DRV_NAME, | |
| 91 | .playback = { | |
| 92 | .stream_name = DRV_NAME "-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 | int ret; | |
| 111 | ||
| 112 | ret = snd_soc_register_codec(&pdev->dev, &max98357a_codec_driver, | |
| 113 | &max98357a_dai_driver, 1); | |
| 114 | if (ret) | |
| 115 | dev_err(&pdev->dev, "%s() error registering codec driver: %d\n", | |
| 116 | __func__, ret); | |
| 117 | ||
| 118 | return ret; | |
| 119 | } | |
| 120 | ||
| 121 | static int max98357a_platform_remove(struct platform_device *pdev) | |
| 122 | { | |
| 123 | snd_soc_unregister_codec(&pdev->dev); | |
| 124 | ||
| 125 | return 0; | |
| 126 | } | |
| 127 | ||
| 128 | #ifdef CONFIG_OF | |
| 129 | static const struct of_device_id max98357a_device_id[] = { | |
| 130 | { .compatible = "maxim," DRV_NAME, }, | |
| 131 | {} | |
| 132 | }; | |
| 3efa130d | 133 | MODULE_DEVICE_TABLE(of, max98357a_device_id); |
| af5adf12 KW |
134 | #endif |
| 135 | ||
| 136 | static struct platform_driver max98357a_platform_driver = { | |
| 137 | .driver = { | |
| 138 | .name = DRV_NAME, | |
| 139 | .of_match_table = of_match_ptr(max98357a_device_id), | |
| 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"); | |
| 148 | MODULE_ALIAS("platform:" DRV_NAME); |