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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max9877.c (4550B)

      1// SPDX-License-Identifier: GPL-2.0-or-later
      2/*
      3 * max9877.c  --  amp driver for max9877
      4 *
      5 * Copyright (C) 2009 Samsung Electronics Co.Ltd
      6 * Author: Joonyoung Shim <jy0922.shim@samsung.com>
      7 */
      8
      9#include <linux/module.h>
     10#include <linux/init.h>
     11#include <linux/i2c.h>
     12#include <linux/regmap.h>
     13#include <sound/soc.h>
     14#include <sound/tlv.h>
     15
     16#include "max9877.h"
     17
     18static const struct reg_default max9877_regs[] = {
     19	{ 0, 0x40 },
     20	{ 1, 0x00 },
     21	{ 2, 0x00 },
     22	{ 3, 0x00 },
     23	{ 4, 0x49 },
     24};
     25
     26static const DECLARE_TLV_DB_RANGE(max9877_pgain_tlv,
     27	0, 1, TLV_DB_SCALE_ITEM(0, 900, 0),
     28	2, 2, TLV_DB_SCALE_ITEM(2000, 0, 0)
     29);
     30
     31static const DECLARE_TLV_DB_RANGE(max9877_output_tlv,
     32	0, 7, TLV_DB_SCALE_ITEM(-7900, 400, 1),
     33	8, 15, TLV_DB_SCALE_ITEM(-4700, 300, 0),
     34	16, 23, TLV_DB_SCALE_ITEM(-2300, 200, 0),
     35	24, 31, TLV_DB_SCALE_ITEM(-700, 100, 0)
     36);
     37
     38static const char *max9877_out_mode[] = {
     39	"INA -> SPK",
     40	"INA -> HP",
     41	"INA -> SPK and HP",
     42	"INB -> SPK",
     43	"INB -> HP",
     44	"INB -> SPK and HP",
     45	"INA + INB -> SPK",
     46	"INA + INB -> HP",
     47	"INA + INB -> SPK and HP",
     48};
     49
     50static const char *max9877_osc_mode[] = {
     51	"1176KHz",
     52	"1100KHz",
     53	"700KHz",
     54};
     55
     56static const struct soc_enum max9877_enum[] = {
     57	SOC_ENUM_SINGLE(MAX9877_OUTPUT_MODE, 0, ARRAY_SIZE(max9877_out_mode),
     58			max9877_out_mode),
     59	SOC_ENUM_SINGLE(MAX9877_OUTPUT_MODE, MAX9877_OSC_OFFSET,
     60			ARRAY_SIZE(max9877_osc_mode), max9877_osc_mode),
     61};
     62
     63static const struct snd_kcontrol_new max9877_controls[] = {
     64	SOC_SINGLE_TLV("MAX9877 PGAINA Playback Volume",
     65		       MAX9877_INPUT_MODE, 0, 2, 0, max9877_pgain_tlv),
     66	SOC_SINGLE_TLV("MAX9877 PGAINB Playback Volume",
     67		       MAX9877_INPUT_MODE, 2, 2, 0, max9877_pgain_tlv),
     68	SOC_SINGLE_TLV("MAX9877 Amp Speaker Playback Volume",
     69		       MAX9877_SPK_VOLUME, 0, 31, 0, max9877_output_tlv),
     70	SOC_DOUBLE_R_TLV("MAX9877 Amp HP Playback Volume",
     71			 MAX9877_HPL_VOLUME, MAX9877_HPR_VOLUME, 0, 31, 0,
     72			 max9877_output_tlv),
     73	SOC_SINGLE("MAX9877 INB Stereo Switch",
     74		   MAX9877_INPUT_MODE, 4, 1, 1),
     75	SOC_SINGLE("MAX9877 INA Stereo Switch",
     76		   MAX9877_INPUT_MODE, 5, 1, 1),
     77	SOC_SINGLE("MAX9877 Zero-crossing detection Switch",
     78		   MAX9877_INPUT_MODE, 6, 1, 0),
     79	SOC_SINGLE("MAX9877 Bypass Mode Switch",
     80		   MAX9877_OUTPUT_MODE, 6, 1, 0),
     81	SOC_ENUM("MAX9877 Output Mode", max9877_enum[0]),
     82	SOC_ENUM("MAX9877 Oscillator Mode", max9877_enum[1]),
     83};
     84
     85static const struct snd_soc_dapm_widget max9877_dapm_widgets[] = {
     86SND_SOC_DAPM_INPUT("INA1"),
     87SND_SOC_DAPM_INPUT("INA2"),
     88SND_SOC_DAPM_INPUT("INB1"),
     89SND_SOC_DAPM_INPUT("INB2"),
     90SND_SOC_DAPM_INPUT("RXIN+"),
     91SND_SOC_DAPM_INPUT("RXIN-"),
     92
     93SND_SOC_DAPM_PGA("SHDN", MAX9877_OUTPUT_MODE, 7, 1, NULL, 0),
     94
     95SND_SOC_DAPM_OUTPUT("OUT+"),
     96SND_SOC_DAPM_OUTPUT("OUT-"),
     97SND_SOC_DAPM_OUTPUT("HPL"),
     98SND_SOC_DAPM_OUTPUT("HPR"),
     99};
    100
    101static const struct snd_soc_dapm_route max9877_dapm_routes[] = {
    102	{ "SHDN", NULL, "INA1" },
    103	{ "SHDN", NULL, "INA2" },
    104	{ "SHDN", NULL, "INB1" },
    105	{ "SHDN", NULL, "INB2" },
    106
    107	{ "OUT+", NULL, "RXIN+" },
    108	{ "OUT+", NULL, "SHDN" },
    109
    110	{ "OUT-", NULL, "SHDN" },
    111	{ "OUT-", NULL, "RXIN-" },
    112
    113	{ "HPL", NULL, "SHDN" },
    114	{ "HPR", NULL, "SHDN" },
    115};
    116
    117static const struct snd_soc_component_driver max9877_component_driver = {
    118	.controls = max9877_controls,
    119	.num_controls = ARRAY_SIZE(max9877_controls),
    120
    121	.dapm_widgets = max9877_dapm_widgets,
    122	.num_dapm_widgets = ARRAY_SIZE(max9877_dapm_widgets),
    123	.dapm_routes = max9877_dapm_routes,
    124	.num_dapm_routes = ARRAY_SIZE(max9877_dapm_routes),
    125};
    126
    127static const struct regmap_config max9877_regmap = {
    128	.reg_bits = 8,
    129	.val_bits = 8,
    130
    131	.reg_defaults = max9877_regs,
    132	.num_reg_defaults = ARRAY_SIZE(max9877_regs),
    133	.cache_type = REGCACHE_RBTREE,
    134};
    135
    136static int max9877_i2c_probe(struct i2c_client *client)
    137{
    138	struct regmap *regmap;
    139	int i;
    140
    141	regmap = devm_regmap_init_i2c(client, &max9877_regmap);
    142	if (IS_ERR(regmap))
    143		return PTR_ERR(regmap);
    144
    145	/* Ensure the device is in reset state */
    146	for (i = 0; i < ARRAY_SIZE(max9877_regs); i++)
    147		regmap_write(regmap, max9877_regs[i].reg, max9877_regs[i].def);
    148
    149	return devm_snd_soc_register_component(&client->dev,
    150			&max9877_component_driver, NULL, 0);
    151}
    152
    153static const struct i2c_device_id max9877_i2c_id[] = {
    154	{ "max9877", 0 },
    155	{ }
    156};
    157MODULE_DEVICE_TABLE(i2c, max9877_i2c_id);
    158
    159static struct i2c_driver max9877_i2c_driver = {
    160	.driver = {
    161		.name = "max9877",
    162	},
    163	.probe_new = max9877_i2c_probe,
    164	.id_table = max9877_i2c_id,
    165};
    166
    167module_i2c_driver(max9877_i2c_driver);
    168
    169MODULE_DESCRIPTION("ASoC MAX9877 amp driver");
    170MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
    171MODULE_LICENSE("GPL");