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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lm4857.c (3782B)

      1// SPDX-License-Identifier: GPL-2.0-or-later
      2/*
      3 * LM4857 AMP driver
      4 *
      5 * Copyright 2007 Wolfson Microelectronics PLC.
      6 * Author: Graeme Gregory
      7 *         graeme.gregory@wolfsonmicro.com
      8 * Copyright 2011 Lars-Peter Clausen <lars@metafoo.de>
      9 */
     10
     11#include <linux/init.h>
     12#include <linux/module.h>
     13#include <linux/i2c.h>
     14#include <linux/regmap.h>
     15#include <linux/slab.h>
     16
     17#include <sound/core.h>
     18#include <sound/soc.h>
     19#include <sound/tlv.h>
     20
     21static const struct reg_default lm4857_default_regs[] = {
     22	{ 0x0, 0x00 },
     23	{ 0x1, 0x00 },
     24	{ 0x2, 0x00 },
     25	{ 0x3, 0x00 },
     26};
     27
     28/* The register offsets in the cache array */
     29#define LM4857_MVOL 0
     30#define LM4857_LVOL 1
     31#define LM4857_RVOL 2
     32#define LM4857_CTRL 3
     33
     34/* the shifts required to set these bits */
     35#define LM4857_3D 5
     36#define LM4857_WAKEUP 5
     37#define LM4857_EPGAIN 4
     38
     39static const unsigned int lm4857_mode_values[] = {
     40	0,
     41	6,
     42	7,
     43	8,
     44	9,
     45};
     46
     47static const char * const lm4857_mode_texts[] = {
     48	"Off",
     49	"Earpiece",
     50	"Loudspeaker",
     51	"Loudspeaker + Headphone",
     52	"Headphone",
     53};
     54
     55static SOC_VALUE_ENUM_SINGLE_AUTODISABLE_DECL(lm4857_mode_enum,
     56	LM4857_CTRL, 0, 0xf, lm4857_mode_texts, lm4857_mode_values);
     57
     58static const struct snd_kcontrol_new lm4857_mode_ctrl =
     59	SOC_DAPM_ENUM("Mode", lm4857_mode_enum);
     60
     61static const struct snd_soc_dapm_widget lm4857_dapm_widgets[] = {
     62	SND_SOC_DAPM_INPUT("IN"),
     63
     64	SND_SOC_DAPM_DEMUX("Mode", SND_SOC_NOPM, 0, 0, &lm4857_mode_ctrl),
     65
     66	SND_SOC_DAPM_OUTPUT("LS"),
     67	SND_SOC_DAPM_OUTPUT("HP"),
     68	SND_SOC_DAPM_OUTPUT("EP"),
     69};
     70
     71static const DECLARE_TLV_DB_SCALE(stereo_tlv, -4050, 150, 0);
     72static const DECLARE_TLV_DB_SCALE(mono_tlv, -3450, 150, 0);
     73
     74static const struct snd_kcontrol_new lm4857_controls[] = {
     75	SOC_SINGLE_TLV("Left Playback Volume", LM4857_LVOL, 0, 31, 0,
     76		stereo_tlv),
     77	SOC_SINGLE_TLV("Right Playback Volume", LM4857_RVOL, 0, 31, 0,
     78		stereo_tlv),
     79	SOC_SINGLE_TLV("Mono Playback Volume", LM4857_MVOL, 0, 31, 0,
     80		mono_tlv),
     81	SOC_SINGLE("Spk 3D Playback Switch", LM4857_LVOL, LM4857_3D, 1, 0),
     82	SOC_SINGLE("HP 3D Playback Switch", LM4857_RVOL, LM4857_3D, 1, 0),
     83	SOC_SINGLE("Fast Wakeup Playback Switch", LM4857_CTRL,
     84		LM4857_WAKEUP, 1, 0),
     85	SOC_SINGLE("Earpiece 6dB Playback Switch", LM4857_CTRL,
     86		LM4857_EPGAIN, 1, 0),
     87};
     88
     89static const struct snd_soc_dapm_route lm4857_routes[] = {
     90	{ "Mode", NULL, "IN" },
     91	{ "LS", "Loudspeaker", "Mode" },
     92	{ "LS", "Loudspeaker + Headphone", "Mode" },
     93	{ "HP", "Headphone", "Mode" },
     94	{ "HP", "Loudspeaker + Headphone", "Mode" },
     95	{ "EP", "Earpiece", "Mode" },
     96};
     97
     98static const struct snd_soc_component_driver lm4857_component_driver = {
     99	.controls = lm4857_controls,
    100	.num_controls = ARRAY_SIZE(lm4857_controls),
    101	.dapm_widgets = lm4857_dapm_widgets,
    102	.num_dapm_widgets = ARRAY_SIZE(lm4857_dapm_widgets),
    103	.dapm_routes = lm4857_routes,
    104	.num_dapm_routes = ARRAY_SIZE(lm4857_routes),
    105};
    106
    107static const struct regmap_config lm4857_regmap_config = {
    108	.val_bits = 6,
    109	.reg_bits = 2,
    110
    111	.max_register = LM4857_CTRL,
    112
    113	.cache_type = REGCACHE_FLAT,
    114	.reg_defaults = lm4857_default_regs,
    115	.num_reg_defaults = ARRAY_SIZE(lm4857_default_regs),
    116};
    117
    118static int lm4857_i2c_probe(struct i2c_client *i2c)
    119{
    120	struct regmap *regmap;
    121
    122	regmap = devm_regmap_init_i2c(i2c, &lm4857_regmap_config);
    123	if (IS_ERR(regmap))
    124		return PTR_ERR(regmap);
    125
    126	return devm_snd_soc_register_component(&i2c->dev,
    127		&lm4857_component_driver, NULL, 0);
    128}
    129
    130static const struct i2c_device_id lm4857_i2c_id[] = {
    131	{ "lm4857", 0 },
    132	{ }
    133};
    134MODULE_DEVICE_TABLE(i2c, lm4857_i2c_id);
    135
    136static struct i2c_driver lm4857_i2c_driver = {
    137	.driver = {
    138		.name = "lm4857",
    139	},
    140	.probe_new = lm4857_i2c_probe,
    141	.id_table = lm4857_i2c_id,
    142};
    143
    144module_i2c_driver(lm4857_i2c_driver);
    145
    146MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
    147MODULE_DESCRIPTION("LM4857 amplifier driver");
    148MODULE_LICENSE("GPL");