diff options
Diffstat (limited to 'sound/soc/codecs/wm8782.c')
| -rw-r--r-- | sound/soc/codecs/wm8782.c | 147 |
1 files changed, 131 insertions, 16 deletions
diff --git a/sound/soc/codecs/wm8782.c b/sound/soc/codecs/wm8782.c index f1fdbf63abb4..3a2acdfa9b85 100644 --- a/sound/soc/codecs/wm8782.c +++ b/sound/soc/codecs/wm8782.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * sound/soc/codecs/wm8782.c * simple, strap-pin configured 24bit 2ch ADC @@ -6,13 +7,8 @@ * Author: Johannes Stezenbach <js@sig21.net> * * based on ad73311.c - * Copyright: Analog Device Inc. + * Copyright: Analog Devices Inc. * Author: Cliff Cai <cliff.cai@analog.com> - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the - * Free Software Foundation; either version 2 of the License, or (at your - * option) any later version. */ #include <linux/init.h> @@ -20,47 +16,166 @@ #include <linux/module.h> #include <linux/kernel.h> #include <linux/device.h> +#include <linux/regulator/consumer.h> #include <sound/core.h> #include <sound/pcm.h> #include <sound/ac97_codec.h> #include <sound/initval.h> #include <sound/soc.h> +/* regulator power supply names */ +static const char *supply_names[] = { + "Vdda", /* analog supply, 2.7V - 3.6V */ + "Vdd", /* digital supply, 2.7V - 5.5V */ +}; + +struct wm8782_priv { + struct regulator_bulk_data supplies[ARRAY_SIZE(supply_names)]; + int max_rate; +}; + +static int wm8782_dai_startup(struct snd_pcm_substream *sub, struct snd_soc_dai *dai) +{ + struct snd_pcm_runtime *runtime = sub->runtime; + struct wm8782_priv *priv = + snd_soc_component_get_drvdata(dai->component); + + return snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE, + 8000, priv->max_rate); +} + +static const struct snd_soc_dapm_widget wm8782_dapm_widgets[] = { +SND_SOC_DAPM_INPUT("AINL"), +SND_SOC_DAPM_INPUT("AINR"), +}; + +static const struct snd_soc_dapm_route wm8782_dapm_routes[] = { + { "Capture", NULL, "AINL" }, + { "Capture", NULL, "AINR" }, +}; + +static const struct snd_soc_dai_ops wm8782_dai_ops = { + .startup = &wm8782_dai_startup, +}; + static struct snd_soc_dai_driver wm8782_dai = { .name = "wm8782", .capture = { .stream_name = "Capture", .channels_min = 2, .channels_max = 2, - /* For configurations with FSAMPEN=0 */ - .rates = SNDRV_PCM_RATE_8000_48000, + .rates = SNDRV_PCM_RATE_8000_192000, .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE, }, + .ops = &wm8782_dai_ops, }; -static struct snd_soc_codec_driver soc_codec_dev_wm8782; +static int wm8782_soc_probe(struct snd_soc_component *component) +{ + struct wm8782_priv *priv = snd_soc_component_get_drvdata(component); + return regulator_bulk_enable(ARRAY_SIZE(priv->supplies), priv->supplies); +} -static int wm8782_probe(struct platform_device *pdev) +static void wm8782_soc_remove(struct snd_soc_component *component) { - return snd_soc_register_codec(&pdev->dev, - &soc_codec_dev_wm8782, &wm8782_dai, 1); + struct wm8782_priv *priv = snd_soc_component_get_drvdata(component); + regulator_bulk_disable(ARRAY_SIZE(priv->supplies), priv->supplies); } -static int wm8782_remove(struct platform_device *pdev) +#ifdef CONFIG_PM +static int wm8782_soc_suspend(struct snd_soc_component *component) { - snd_soc_unregister_codec(&pdev->dev); + struct wm8782_priv *priv = snd_soc_component_get_drvdata(component); + regulator_bulk_disable(ARRAY_SIZE(priv->supplies), priv->supplies); return 0; } +static int wm8782_soc_resume(struct snd_soc_component *component) +{ + struct wm8782_priv *priv = snd_soc_component_get_drvdata(component); + return regulator_bulk_enable(ARRAY_SIZE(priv->supplies), priv->supplies); +} +#else +#define wm8782_soc_suspend NULL +#define wm8782_soc_resume NULL +#endif /* CONFIG_PM */ + +static const struct snd_soc_component_driver soc_component_dev_wm8782 = { + .probe = wm8782_soc_probe, + .remove = wm8782_soc_remove, + .suspend = wm8782_soc_suspend, + .resume = wm8782_soc_resume, + .dapm_widgets = wm8782_dapm_widgets, + .num_dapm_widgets = ARRAY_SIZE(wm8782_dapm_widgets), + .dapm_routes = wm8782_dapm_routes, + .num_dapm_routes = ARRAY_SIZE(wm8782_dapm_routes), + .idle_bias_on = 1, + .use_pmdown_time = 1, + .endianness = 1, +}; + +static int wm8782_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct device_node *np = dev->of_node; + struct wm8782_priv *priv; + int ret, i, fsampen; + + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + dev_set_drvdata(dev, priv); + + for (i = 0; i < ARRAY_SIZE(supply_names); i++) + priv->supplies[i].supply = supply_names[i]; + + ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(priv->supplies), + priv->supplies); + if (ret < 0) + return ret; + + // Assume lowest value by default to avoid inadvertent overclocking + fsampen = 0; + + if (np) + of_property_read_u32(np, "wlf,fsampen", &fsampen); + + switch (fsampen) { + case 0: + priv->max_rate = 48000; + break; + case 1: + priv->max_rate = 96000; + break; + case 2: + priv->max_rate = 192000; + break; + default: + dev_err(dev, "Invalid wlf,fsampen value"); + return -EINVAL; + } + + return devm_snd_soc_register_component(&pdev->dev, + &soc_component_dev_wm8782, &wm8782_dai, 1); +} + +#ifdef CONFIG_OF +static const struct of_device_id wm8782_of_match[] = { + { .compatible = "wlf,wm8782", }, + { } +}; +MODULE_DEVICE_TABLE(of, wm8782_of_match); +#endif + static struct platform_driver wm8782_codec_driver = { .driver = { .name = "wm8782", - .owner = THIS_MODULE, + .of_match_table = of_match_ptr(wm8782_of_match), }, .probe = wm8782_probe, - .remove = wm8782_remove, }; module_platform_driver(wm8782_codec_driver); 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