cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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pcm3008.c (4268B)

      1// SPDX-License-Identifier: GPL-2.0-or-later
      2/*
      3 * ALSA Soc PCM3008 codec support
      4 *
      5 * Author:	Hugo Villeneuve
      6 * Copyright (C) 2008 Lyrtech inc
      7 *
      8 * Based on AC97 Soc codec, original copyright follow:
      9 * Copyright 2005 Wolfson Microelectronics PLC.
     10 *
     11 * Generic PCM3008 support.
     12 */
     13
     14#include <linux/init.h>
     15#include <linux/kernel.h>
     16#include <linux/device.h>
     17#include <linux/gpio.h>
     18#include <linux/slab.h>
     19#include <linux/module.h>
     20#include <sound/core.h>
     21#include <sound/pcm.h>
     22#include <sound/initval.h>
     23#include <sound/soc.h>
     24
     25#include "pcm3008.h"
     26
     27static int pcm3008_dac_ev(struct snd_soc_dapm_widget *w,
     28			  struct snd_kcontrol *kcontrol,
     29			  int event)
     30{
     31	struct snd_soc_component *component = snd_soc_dapm_to_component(w->dapm);
     32	struct pcm3008_setup_data *setup = component->dev->platform_data;
     33
     34	gpio_set_value_cansleep(setup->pdda_pin,
     35				SND_SOC_DAPM_EVENT_ON(event));
     36
     37	return 0;
     38}
     39
     40static int pcm3008_adc_ev(struct snd_soc_dapm_widget *w,
     41			  struct snd_kcontrol *kcontrol,
     42			  int event)
     43{
     44	struct snd_soc_component *component = snd_soc_dapm_to_component(w->dapm);
     45	struct pcm3008_setup_data *setup = component->dev->platform_data;
     46
     47	gpio_set_value_cansleep(setup->pdad_pin,
     48				SND_SOC_DAPM_EVENT_ON(event));
     49
     50	return 0;
     51}
     52
     53static const struct snd_soc_dapm_widget pcm3008_dapm_widgets[] = {
     54SND_SOC_DAPM_INPUT("VINL"),
     55SND_SOC_DAPM_INPUT("VINR"),
     56
     57SND_SOC_DAPM_DAC_E("DAC", NULL, SND_SOC_NOPM, 0, 0, pcm3008_dac_ev,
     58		   SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
     59SND_SOC_DAPM_ADC_E("ADC", NULL, SND_SOC_NOPM, 0, 0, pcm3008_adc_ev,
     60		   SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
     61
     62SND_SOC_DAPM_OUTPUT("VOUTL"),
     63SND_SOC_DAPM_OUTPUT("VOUTR"),
     64};
     65
     66static const struct snd_soc_dapm_route pcm3008_dapm_routes[] = {
     67	{ "PCM3008 Capture", NULL, "ADC" },
     68	{ "ADC", NULL, "VINL" },
     69	{ "ADC", NULL, "VINR" },
     70
     71	{ "DAC", NULL, "PCM3008 Playback" },
     72	{ "VOUTL", NULL, "DAC" },
     73	{ "VOUTR", NULL, "DAC" },
     74};
     75
     76#define PCM3008_RATES (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |	\
     77		       SNDRV_PCM_RATE_48000)
     78
     79static struct snd_soc_dai_driver pcm3008_dai = {
     80	.name = "pcm3008-hifi",
     81	.playback = {
     82		.stream_name = "PCM3008 Playback",
     83		.channels_min = 1,
     84		.channels_max = 2,
     85		.rates = PCM3008_RATES,
     86		.formats = SNDRV_PCM_FMTBIT_S16_LE,
     87	},
     88	.capture = {
     89		.stream_name = "PCM3008 Capture",
     90		.channels_min = 1,
     91		.channels_max = 2,
     92		.rates = PCM3008_RATES,
     93		.formats = SNDRV_PCM_FMTBIT_S16_LE,
     94	},
     95};
     96
     97static const struct snd_soc_component_driver soc_component_dev_pcm3008 = {
     98	.dapm_widgets		= pcm3008_dapm_widgets,
     99	.num_dapm_widgets	= ARRAY_SIZE(pcm3008_dapm_widgets),
    100	.dapm_routes		= pcm3008_dapm_routes,
    101	.num_dapm_routes	= ARRAY_SIZE(pcm3008_dapm_routes),
    102	.idle_bias_on		= 1,
    103	.use_pmdown_time	= 1,
    104	.endianness		= 1,
    105	.non_legacy_dai_naming	= 1,
    106};
    107
    108static int pcm3008_codec_probe(struct platform_device *pdev)
    109{
    110	struct pcm3008_setup_data *setup = pdev->dev.platform_data;
    111	int ret;
    112
    113	if (!setup)
    114		return -EINVAL;
    115
    116	/* DEM1  DEM0  DE-EMPHASIS_MODE
    117	 * Low   Low   De-emphasis 44.1 kHz ON
    118	 * Low   High  De-emphasis OFF
    119	 * High  Low   De-emphasis 48 kHz ON
    120	 * High  High  De-emphasis 32 kHz ON
    121	 */
    122
    123	/* Configure DEM0 GPIO (turning OFF DAC De-emphasis). */
    124	ret = devm_gpio_request_one(&pdev->dev, setup->dem0_pin,
    125				    GPIOF_OUT_INIT_HIGH, "codec_dem0");
    126	if (ret != 0)
    127		return ret;
    128
    129	/* Configure DEM1 GPIO (turning OFF DAC De-emphasis). */
    130	ret = devm_gpio_request_one(&pdev->dev, setup->dem1_pin,
    131				    GPIOF_OUT_INIT_LOW, "codec_dem1");
    132	if (ret != 0)
    133		return ret;
    134
    135	/* Configure PDAD GPIO. */
    136	ret = devm_gpio_request_one(&pdev->dev, setup->pdad_pin,
    137				    GPIOF_OUT_INIT_LOW, "codec_pdad");
    138	if (ret != 0)
    139		return ret;
    140
    141	/* Configure PDDA GPIO. */
    142	ret = devm_gpio_request_one(&pdev->dev, setup->pdda_pin,
    143				    GPIOF_OUT_INIT_LOW, "codec_pdda");
    144	if (ret != 0)
    145		return ret;
    146
    147	return devm_snd_soc_register_component(&pdev->dev,
    148			&soc_component_dev_pcm3008, &pcm3008_dai, 1);
    149}
    150
    151MODULE_ALIAS("platform:pcm3008-codec");
    152
    153static struct platform_driver pcm3008_codec_driver = {
    154	.probe		= pcm3008_codec_probe,
    155	.driver		= {
    156		.name	= "pcm3008-codec",
    157	},
    158};
    159
    160module_platform_driver(pcm3008_codec_driver);
    161
    162MODULE_DESCRIPTION("Soc PCM3008 driver");
    163MODULE_AUTHOR("Hugo Villeneuve");
    164MODULE_LICENSE("GPL");