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This converts the PCM3008 driver to look up the GPIO lines using descriptors. Apparently there are no in-tree users of the platform data struct, so users need to adopt. New users can associate the GPIO lines with the platform device "pcm3008-codec". Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Link: https://patch.msgid.link/20250312-pcm-codecs-v1-2-41ffc4f8fc5c@linaro.org Signed-off-by: Mark Brown <broonie@kernel.org>
166 lines
4.3 KiB
C
166 lines
4.3 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* ALSA Soc PCM3008 codec support
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*
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* Author: Hugo Villeneuve
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* Copyright (C) 2008 Lyrtech inc
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*
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* Based on AC97 Soc codec, original copyright follow:
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* Copyright 2005 Wolfson Microelectronics PLC.
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*
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* Generic PCM3008 support.
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*/
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/device.h>
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#include <linux/gpio/consumer.h>
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#include <linux/slab.h>
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#include <linux/module.h>
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#include <sound/core.h>
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#include <sound/pcm.h>
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#include <sound/initval.h>
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#include <sound/soc.h>
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struct pcm3008 {
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struct gpio_desc *dem0_pin;
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struct gpio_desc *dem1_pin;
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struct gpio_desc *pdad_pin;
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struct gpio_desc *pdda_pin;
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};
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static int pcm3008_dac_ev(struct snd_soc_dapm_widget *w,
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struct snd_kcontrol *kcontrol,
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int event)
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{
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struct snd_soc_component *component = snd_soc_dapm_to_component(w->dapm);
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struct pcm3008 *pcm = component->dev->platform_data;
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gpiod_set_value_cansleep(pcm->pdda_pin,
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SND_SOC_DAPM_EVENT_ON(event));
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return 0;
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}
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static int pcm3008_adc_ev(struct snd_soc_dapm_widget *w,
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struct snd_kcontrol *kcontrol,
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int event)
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{
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struct snd_soc_component *component = snd_soc_dapm_to_component(w->dapm);
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struct pcm3008 *pcm = component->dev->platform_data;
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gpiod_set_value_cansleep(pcm->pdad_pin,
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SND_SOC_DAPM_EVENT_ON(event));
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return 0;
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}
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static const struct snd_soc_dapm_widget pcm3008_dapm_widgets[] = {
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SND_SOC_DAPM_INPUT("VINL"),
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SND_SOC_DAPM_INPUT("VINR"),
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SND_SOC_DAPM_DAC_E("DAC", NULL, SND_SOC_NOPM, 0, 0, pcm3008_dac_ev,
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SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
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SND_SOC_DAPM_ADC_E("ADC", NULL, SND_SOC_NOPM, 0, 0, pcm3008_adc_ev,
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SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
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SND_SOC_DAPM_OUTPUT("VOUTL"),
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SND_SOC_DAPM_OUTPUT("VOUTR"),
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};
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static const struct snd_soc_dapm_route pcm3008_dapm_routes[] = {
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{ "PCM3008 Capture", NULL, "ADC" },
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{ "ADC", NULL, "VINL" },
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{ "ADC", NULL, "VINR" },
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{ "DAC", NULL, "PCM3008 Playback" },
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{ "VOUTL", NULL, "DAC" },
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{ "VOUTR", NULL, "DAC" },
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};
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#define PCM3008_RATES (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \
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SNDRV_PCM_RATE_48000)
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static struct snd_soc_dai_driver pcm3008_dai = {
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.name = "pcm3008-hifi",
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.playback = {
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.stream_name = "PCM3008 Playback",
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.channels_min = 1,
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.channels_max = 2,
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.rates = PCM3008_RATES,
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.formats = SNDRV_PCM_FMTBIT_S16_LE,
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},
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.capture = {
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.stream_name = "PCM3008 Capture",
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.channels_min = 1,
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.channels_max = 2,
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.rates = PCM3008_RATES,
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.formats = SNDRV_PCM_FMTBIT_S16_LE,
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},
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};
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static const struct snd_soc_component_driver soc_component_dev_pcm3008 = {
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.dapm_widgets = pcm3008_dapm_widgets,
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.num_dapm_widgets = ARRAY_SIZE(pcm3008_dapm_widgets),
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.dapm_routes = pcm3008_dapm_routes,
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.num_dapm_routes = ARRAY_SIZE(pcm3008_dapm_routes),
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.idle_bias_on = 1,
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.use_pmdown_time = 1,
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.endianness = 1,
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};
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static int pcm3008_codec_probe(struct platform_device *pdev)
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{
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struct device *dev = &pdev->dev;
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struct pcm3008 *pcm;
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pcm = devm_kzalloc(dev, sizeof(*pcm), GFP_KERNEL);
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if (!pcm)
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return -ENOMEM;
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platform_set_drvdata(pdev, pcm);
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/* DEM1 DEM0 DE-EMPHASIS_MODE
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* Low Low De-emphasis 44.1 kHz ON
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* Low High De-emphasis OFF
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* High Low De-emphasis 48 kHz ON
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* High High De-emphasis 32 kHz ON
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*/
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/* Configure DEM0 GPIO (turning OFF DAC De-emphasis). */
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pcm->dem0_pin = devm_gpiod_get(dev, "dem0", GPIOD_OUT_HIGH);
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if (IS_ERR(pcm->dem0_pin))
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return PTR_ERR(pcm->dem0_pin);
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/* Configure DEM1 GPIO (turning OFF DAC De-emphasis). */
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pcm->dem1_pin = devm_gpiod_get(dev, "dem1", GPIOD_OUT_LOW);
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if (IS_ERR(pcm->dem1_pin))
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return PTR_ERR(pcm->dem1_pin);
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/* Configure PDAD GPIO. */
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pcm->pdad_pin = devm_gpiod_get(dev, "pdad", GPIOD_OUT_LOW);
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if (IS_ERR(pcm->pdad_pin))
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return PTR_ERR(pcm->pdad_pin);
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/* Configure PDDA GPIO. */
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pcm->pdda_pin = devm_gpiod_get(dev, "pdda", GPIOD_OUT_LOW);
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if (IS_ERR(pcm->pdda_pin))
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return PTR_ERR(pcm->pdda_pin);
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return devm_snd_soc_register_component(dev,
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&soc_component_dev_pcm3008, &pcm3008_dai, 1);
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}
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MODULE_ALIAS("platform:pcm3008-codec");
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static struct platform_driver pcm3008_codec_driver = {
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.probe = pcm3008_codec_probe,
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.driver = {
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.name = "pcm3008-codec",
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},
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};
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module_platform_driver(pcm3008_codec_driver);
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MODULE_DESCRIPTION("Soc PCM3008 driver");
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MODULE_AUTHOR("Hugo Villeneuve");
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MODULE_LICENSE("GPL");
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