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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ac100.c (4326B)

      1// SPDX-License-Identifier: GPL-2.0-only
      2/*
      3 * MFD core driver for X-Powers' AC100 Audio Codec IC
      4 *
      5 * The AC100 is a highly integrated audio codec and RTC subsystem designed
      6 * for mobile applications. It has 3 I2S/PCM interfaces, a 2 channel DAC,
      7 * a 2 channel ADC with 5 inputs and a builtin mixer. The RTC subsystem has
      8 * 3 clock outputs.
      9 *
     10 * The audio codec and RTC parts are completely separate, sharing only the
     11 * host interface for access to its registers.
     12 *
     13 * Copyright (2016) Chen-Yu Tsai
     14 *
     15 * Author: Chen-Yu Tsai <wens@csie.org>
     16 */
     17
     18#include <linux/interrupt.h>
     19#include <linux/kernel.h>
     20#include <linux/mfd/core.h>
     21#include <linux/mfd/ac100.h>
     22#include <linux/module.h>
     23#include <linux/of.h>
     24#include <linux/regmap.h>
     25#include <linux/sunxi-rsb.h>
     26
     27static const struct regmap_range ac100_writeable_ranges[] = {
     28	regmap_reg_range(AC100_CHIP_AUDIO_RST, AC100_I2S_SR_CTRL),
     29	regmap_reg_range(AC100_I2S1_CLK_CTRL, AC100_I2S1_MXR_GAIN),
     30	regmap_reg_range(AC100_I2S2_CLK_CTRL, AC100_I2S2_MXR_GAIN),
     31	regmap_reg_range(AC100_I2S3_CLK_CTRL, AC100_I2S3_SIG_PATH_CTRL),
     32	regmap_reg_range(AC100_ADC_DIG_CTRL, AC100_ADC_VOL_CTRL),
     33	regmap_reg_range(AC100_HMIC_CTRL1, AC100_HMIC_STATUS),
     34	regmap_reg_range(AC100_DAC_DIG_CTRL, AC100_DAC_MXR_GAIN),
     35	regmap_reg_range(AC100_ADC_APC_CTRL, AC100_LINEOUT_CTRL),
     36	regmap_reg_range(AC100_ADC_DAP_L_CTRL, AC100_ADC_DAP_OPT),
     37	regmap_reg_range(AC100_DAC_DAP_CTRL, AC100_DAC_DAP_OPT),
     38	regmap_reg_range(AC100_ADC_DAP_ENA, AC100_DAC_DAP_ENA),
     39	regmap_reg_range(AC100_SRC1_CTRL1, AC100_SRC1_CTRL2),
     40	regmap_reg_range(AC100_SRC2_CTRL1, AC100_SRC2_CTRL2),
     41	regmap_reg_range(AC100_CLK32K_ANALOG_CTRL, AC100_CLKOUT_CTRL3),
     42	regmap_reg_range(AC100_RTC_RST, AC100_RTC_UPD),
     43	regmap_reg_range(AC100_ALM_INT_ENA, AC100_ALM_INT_STA),
     44	regmap_reg_range(AC100_ALM_SEC, AC100_RTC_GP(15)),
     45};
     46
     47static const struct regmap_range ac100_volatile_ranges[] = {
     48	regmap_reg_range(AC100_CHIP_AUDIO_RST, AC100_PLL_CTRL2),
     49	regmap_reg_range(AC100_HMIC_STATUS, AC100_HMIC_STATUS),
     50	regmap_reg_range(AC100_ADC_DAP_L_STA, AC100_ADC_DAP_L_STA),
     51	regmap_reg_range(AC100_SRC1_CTRL1, AC100_SRC1_CTRL1),
     52	regmap_reg_range(AC100_SRC1_CTRL3, AC100_SRC2_CTRL1),
     53	regmap_reg_range(AC100_SRC2_CTRL3, AC100_SRC2_CTRL4),
     54	regmap_reg_range(AC100_RTC_RST, AC100_RTC_RST),
     55	regmap_reg_range(AC100_RTC_SEC, AC100_ALM_INT_STA),
     56	regmap_reg_range(AC100_ALM_SEC, AC100_ALM_UPD),
     57};
     58
     59static const struct regmap_access_table ac100_writeable_table = {
     60	.yes_ranges	= ac100_writeable_ranges,
     61	.n_yes_ranges	= ARRAY_SIZE(ac100_writeable_ranges),
     62};
     63
     64static const struct regmap_access_table ac100_volatile_table = {
     65	.yes_ranges	= ac100_volatile_ranges,
     66	.n_yes_ranges	= ARRAY_SIZE(ac100_volatile_ranges),
     67};
     68
     69static const struct regmap_config ac100_regmap_config = {
     70	.reg_bits	= 8,
     71	.val_bits	= 16,
     72	.wr_table	= &ac100_writeable_table,
     73	.volatile_table	= &ac100_volatile_table,
     74	.max_register	= AC100_RTC_GP(15),
     75	.cache_type	= REGCACHE_RBTREE,
     76};
     77
     78static struct mfd_cell ac100_cells[] = {
     79	{
     80		.name		= "ac100-codec",
     81		.of_compatible	= "x-powers,ac100-codec",
     82	}, {
     83		.name		= "ac100-rtc",
     84		.of_compatible	= "x-powers,ac100-rtc",
     85	},
     86};
     87
     88static int ac100_rsb_probe(struct sunxi_rsb_device *rdev)
     89{
     90	struct ac100_dev *ac100;
     91	int ret;
     92
     93	ac100 = devm_kzalloc(&rdev->dev, sizeof(*ac100), GFP_KERNEL);
     94	if (!ac100)
     95		return -ENOMEM;
     96
     97	ac100->dev = &rdev->dev;
     98	sunxi_rsb_device_set_drvdata(rdev, ac100);
     99
    100	ac100->regmap = devm_regmap_init_sunxi_rsb(rdev, &ac100_regmap_config);
    101	if (IS_ERR(ac100->regmap)) {
    102		ret = PTR_ERR(ac100->regmap);
    103		dev_err(ac100->dev, "regmap init failed: %d\n", ret);
    104		return ret;
    105	}
    106
    107	ret = devm_mfd_add_devices(ac100->dev, PLATFORM_DEVID_NONE, ac100_cells,
    108				   ARRAY_SIZE(ac100_cells), NULL, 0, NULL);
    109	if (ret) {
    110		dev_err(ac100->dev, "failed to add MFD devices: %d\n", ret);
    111		return ret;
    112	}
    113
    114	return 0;
    115}
    116
    117static const struct of_device_id ac100_of_match[] = {
    118	{ .compatible = "x-powers,ac100" },
    119	{ },
    120};
    121MODULE_DEVICE_TABLE(of, ac100_of_match);
    122
    123static struct sunxi_rsb_driver ac100_rsb_driver = {
    124	.driver = {
    125		.name	= "ac100",
    126		.of_match_table	= of_match_ptr(ac100_of_match),
    127	},
    128	.probe	= ac100_rsb_probe,
    129};
    130module_sunxi_rsb_driver(ac100_rsb_driver);
    131
    132MODULE_DESCRIPTION("Audio codec MFD core driver for AC100");
    133MODULE_AUTHOR("Chen-Yu Tsai <wens@csie.org>");
    134MODULE_LICENSE("GPL v2");