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585083c539
The AC100 is a multifunction device with an audio codec subsystem and an RTC subsystem. These two subsystems share a common register space and host interface. Signed-off-by: Chen-Yu Tsai <wens@csie.org> Signed-off-by: Lee Jones <lee.jones@linaro.org>
138 lines
4.4 KiB
C
138 lines
4.4 KiB
C
/*
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* MFD core driver for X-Powers' AC100 Audio Codec IC
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*
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* The AC100 is a highly integrated audio codec and RTC subsystem designed
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* for mobile applications. It has 3 I2S/PCM interfaces, a 2 channel DAC,
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* a 2 channel ADC with 5 inputs and a builtin mixer. The RTC subsystem has
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* 3 clock outputs.
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*
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* The audio codec and RTC parts are completely separate, sharing only the
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* host interface for access to its registers.
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*
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* Copyright (2016) Chen-Yu Tsai
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*
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* Author: Chen-Yu Tsai <wens@csie.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/interrupt.h>
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#include <linux/kernel.h>
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#include <linux/mfd/core.h>
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#include <linux/mfd/ac100.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/regmap.h>
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#include <linux/sunxi-rsb.h>
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static const struct regmap_range ac100_writeable_ranges[] = {
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regmap_reg_range(AC100_CHIP_AUDIO_RST, AC100_I2S_SR_CTRL),
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regmap_reg_range(AC100_I2S1_CLK_CTRL, AC100_I2S1_MXR_GAIN),
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regmap_reg_range(AC100_I2S2_CLK_CTRL, AC100_I2S2_MXR_GAIN),
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regmap_reg_range(AC100_I2S3_CLK_CTRL, AC100_I2S3_SIG_PATH_CTRL),
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regmap_reg_range(AC100_ADC_DIG_CTRL, AC100_ADC_VOL_CTRL),
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regmap_reg_range(AC100_HMIC_CTRL1, AC100_HMIC_STATUS),
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regmap_reg_range(AC100_DAC_DIG_CTRL, AC100_DAC_MXR_GAIN),
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regmap_reg_range(AC100_ADC_APC_CTRL, AC100_LINEOUT_CTRL),
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regmap_reg_range(AC100_ADC_DAP_L_CTRL, AC100_ADC_DAP_OPT),
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regmap_reg_range(AC100_DAC_DAP_CTRL, AC100_DAC_DAP_OPT),
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regmap_reg_range(AC100_ADC_DAP_ENA, AC100_DAC_DAP_ENA),
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regmap_reg_range(AC100_SRC1_CTRL1, AC100_SRC1_CTRL2),
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regmap_reg_range(AC100_SRC2_CTRL1, AC100_SRC2_CTRL2),
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regmap_reg_range(AC100_CLK32K_ANALOG_CTRL, AC100_CLKOUT_CTRL3),
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regmap_reg_range(AC100_RTC_RST, AC100_RTC_UPD),
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regmap_reg_range(AC100_ALM_INT_ENA, AC100_ALM_INT_STA),
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regmap_reg_range(AC100_ALM_SEC, AC100_RTC_GP(15)),
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};
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static const struct regmap_range ac100_volatile_ranges[] = {
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regmap_reg_range(AC100_CHIP_AUDIO_RST, AC100_PLL_CTRL2),
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regmap_reg_range(AC100_HMIC_STATUS, AC100_HMIC_STATUS),
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regmap_reg_range(AC100_ADC_DAP_L_STA, AC100_ADC_DAP_L_STA),
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regmap_reg_range(AC100_SRC1_CTRL1, AC100_SRC1_CTRL1),
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regmap_reg_range(AC100_SRC1_CTRL3, AC100_SRC2_CTRL1),
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regmap_reg_range(AC100_SRC2_CTRL3, AC100_SRC2_CTRL4),
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regmap_reg_range(AC100_RTC_RST, AC100_RTC_RST),
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regmap_reg_range(AC100_RTC_SEC, AC100_ALM_INT_STA),
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regmap_reg_range(AC100_ALM_SEC, AC100_ALM_UPD),
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};
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static const struct regmap_access_table ac100_writeable_table = {
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.yes_ranges = ac100_writeable_ranges,
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.n_yes_ranges = ARRAY_SIZE(ac100_writeable_ranges),
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};
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static const struct regmap_access_table ac100_volatile_table = {
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.yes_ranges = ac100_volatile_ranges,
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.n_yes_ranges = ARRAY_SIZE(ac100_volatile_ranges),
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};
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static const struct regmap_config ac100_regmap_config = {
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.reg_bits = 8,
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.val_bits = 16,
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.wr_table = &ac100_writeable_table,
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.volatile_table = &ac100_volatile_table,
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.max_register = AC100_RTC_GP(15),
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.cache_type = REGCACHE_RBTREE,
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};
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static struct mfd_cell ac100_cells[] = {
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{
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.name = "ac100-codec",
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.of_compatible = "x-powers,ac100-codec",
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}, {
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.name = "ac100-rtc",
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.of_compatible = "x-powers,ac100-rtc",
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},
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};
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static int ac100_rsb_probe(struct sunxi_rsb_device *rdev)
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{
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struct ac100_dev *ac100;
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int ret;
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ac100 = devm_kzalloc(&rdev->dev, sizeof(*ac100), GFP_KERNEL);
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if (!ac100)
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return -ENOMEM;
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ac100->dev = &rdev->dev;
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sunxi_rsb_device_set_drvdata(rdev, ac100);
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ac100->regmap = devm_regmap_init_sunxi_rsb(rdev, &ac100_regmap_config);
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if (IS_ERR(ac100->regmap)) {
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ret = PTR_ERR(ac100->regmap);
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dev_err(ac100->dev, "regmap init failed: %d\n", ret);
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return ret;
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}
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ret = devm_mfd_add_devices(ac100->dev, PLATFORM_DEVID_NONE, ac100_cells,
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ARRAY_SIZE(ac100_cells), NULL, 0, NULL);
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if (ret) {
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dev_err(ac100->dev, "failed to add MFD devices: %d\n", ret);
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return ret;
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}
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return 0;
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}
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static const struct of_device_id ac100_of_match[] = {
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{ .compatible = "x-powers,ac100" },
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{ },
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};
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MODULE_DEVICE_TABLE(of, ac100_of_match);
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static struct sunxi_rsb_driver ac100_rsb_driver = {
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.driver = {
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.name = "ac100",
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.of_match_table = of_match_ptr(ac100_of_match),
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},
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.probe = ac100_rsb_probe,
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};
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module_sunxi_rsb_driver(ac100_rsb_driver);
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MODULE_DESCRIPTION("Audio codec MFD core driver for AC100");
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MODULE_AUTHOR("Chen-Yu Tsai <wens@csie.org>");
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MODULE_LICENSE("GPL v2");
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