drivers/mfd/ac100.c

0001 // SPDX-License-Identifier: GPL-2.0-only
0002 /*
0003  * MFD core driver for X-Powers' AC100 Audio Codec IC
0004  *
0005  * The AC100 is a highly integrated audio codec and RTC subsystem designed
0006  * for mobile applications. It has 3 I2S/PCM interfaces, a 2 channel DAC,
0007  * a 2 channel ADC with 5 inputs and a builtin mixer. The RTC subsystem has
0008  * 3 clock outputs.
0009  *
0010  * The audio codec and RTC parts are completely separate, sharing only the
0011  * host interface for access to its registers.
0012  *
0013  * Copyright (2016) Chen-Yu Tsai
0014  *
0015  * Author: Chen-Yu Tsai <wens@csie.org>
0016  */
0017
0018 #include <linux/interrupt.h>
0019 #include <linux/kernel.h>
0020 #include <linux/mfd/core.h>
0021 #include <linux/mfd/ac100.h>
0022 #include <linux/module.h>
0023 #include <linux/of.h>
0024 #include <linux/regmap.h>
0025 #include <linux/sunxi-rsb.h>
0026
0027 static const struct regmap_range ac100_writeable_ranges[] = {
0028     regmap_reg_range(AC100_CHIP_AUDIO_RST, AC100_I2S_SR_CTRL),
0029     regmap_reg_range(AC100_I2S1_CLK_CTRL, AC100_I2S1_MXR_GAIN),
0030     regmap_reg_range(AC100_I2S2_CLK_CTRL, AC100_I2S2_MXR_GAIN),
0031     regmap_reg_range(AC100_I2S3_CLK_CTRL, AC100_I2S3_SIG_PATH_CTRL),
0032     regmap_reg_range(AC100_ADC_DIG_CTRL, AC100_ADC_VOL_CTRL),
0033     regmap_reg_range(AC100_HMIC_CTRL1, AC100_HMIC_STATUS),
0034     regmap_reg_range(AC100_DAC_DIG_CTRL, AC100_DAC_MXR_GAIN),
0035     regmap_reg_range(AC100_ADC_APC_CTRL, AC100_LINEOUT_CTRL),
0036     regmap_reg_range(AC100_ADC_DAP_L_CTRL, AC100_ADC_DAP_OPT),
0037     regmap_reg_range(AC100_DAC_DAP_CTRL, AC100_DAC_DAP_OPT),
0038     regmap_reg_range(AC100_ADC_DAP_ENA, AC100_DAC_DAP_ENA),
0039     regmap_reg_range(AC100_SRC1_CTRL1, AC100_SRC1_CTRL2),
0040     regmap_reg_range(AC100_SRC2_CTRL1, AC100_SRC2_CTRL2),
0041     regmap_reg_range(AC100_CLK32K_ANALOG_CTRL, AC100_CLKOUT_CTRL3),
0042     regmap_reg_range(AC100_RTC_RST, AC100_RTC_UPD),
0043     regmap_reg_range(AC100_ALM_INT_ENA, AC100_ALM_INT_STA),
0044     regmap_reg_range(AC100_ALM_SEC, AC100_RTC_GP(15)),
0045 };
0046
0047 static const struct regmap_range ac100_volatile_ranges[] = {
0048     regmap_reg_range(AC100_CHIP_AUDIO_RST, AC100_PLL_CTRL2),
0049     regmap_reg_range(AC100_HMIC_STATUS, AC100_HMIC_STATUS),
0050     regmap_reg_range(AC100_ADC_DAP_L_STA, AC100_ADC_DAP_L_STA),
0051     regmap_reg_range(AC100_SRC1_CTRL1, AC100_SRC1_CTRL1),
0052     regmap_reg_range(AC100_SRC1_CTRL3, AC100_SRC2_CTRL1),
0053     regmap_reg_range(AC100_SRC2_CTRL3, AC100_SRC2_CTRL4),
0054     regmap_reg_range(AC100_RTC_RST, AC100_RTC_RST),
0055     regmap_reg_range(AC100_RTC_SEC, AC100_ALM_INT_STA),
0056     regmap_reg_range(AC100_ALM_SEC, AC100_ALM_UPD),
0057 };
0058
0059 static const struct regmap_access_table ac100_writeable_table = {
0060     .yes_ranges = ac100_writeable_ranges,
0061     .n_yes_ranges   = ARRAY_SIZE(ac100_writeable_ranges),
0062 };
0063
0064 static const struct regmap_access_table ac100_volatile_table = {
0065     .yes_ranges = ac100_volatile_ranges,
0066     .n_yes_ranges   = ARRAY_SIZE(ac100_volatile_ranges),
0067 };
0068
0069 static const struct regmap_config ac100_regmap_config = {
0070     .reg_bits   = 8,
0071     .val_bits   = 16,
0072     .wr_table   = &ac100_writeable_table,
0073     .volatile_table = &ac100_volatile_table,
0074     .max_register   = AC100_RTC_GP(15),
0075     .cache_type = REGCACHE_RBTREE,
0076 };
0077
0078 static struct mfd_cell ac100_cells[] = {
0079     {
0080         .name       = "ac100-codec",
0081         .of_compatible  = "x-powers,ac100-codec",
0082     }, {
0083         .name       = "ac100-rtc",
0084         .of_compatible  = "x-powers,ac100-rtc",
0085     },
0086 };
0087
0088 static int ac100_rsb_probe(struct sunxi_rsb_device *rdev)
0089 {
0090     struct ac100_dev *ac100;
0091     int ret;
0092
0093     ac100 = devm_kzalloc(&rdev->dev, sizeof(*ac100), GFP_KERNEL);
0094     if (!ac100)
0095         return -ENOMEM;
0096
0097     ac100->dev = &rdev->dev;
0098     sunxi_rsb_device_set_drvdata(rdev, ac100);
0099
0100     ac100->regmap = devm_regmap_init_sunxi_rsb(rdev, &ac100_regmap_config);
0101     if (IS_ERR(ac100->regmap)) {
0102         ret = PTR_ERR(ac100->regmap);
0103         dev_err(ac100->dev, "regmap init failed: %d\n", ret);
0104         return ret;
0105     }
0106
0107     ret = devm_mfd_add_devices(ac100->dev, PLATFORM_DEVID_NONE, ac100_cells,
0108                    ARRAY_SIZE(ac100_cells), NULL, 0, NULL);
0109     if (ret) {
0110         dev_err(ac100->dev, "failed to add MFD devices: %d\n", ret);
0111         return ret;
0112     }
0113
0114     return 0;
0115 }
0116
0117 static const struct of_device_id ac100_of_match[] = {
0118     { .compatible = "x-powers,ac100" },
0119     { },
0120 };
0121 MODULE_DEVICE_TABLE(of, ac100_of_match);
0122
0123 static struct sunxi_rsb_driver ac100_rsb_driver = {
0124     .driver = {
0125         .name   = "ac100",
0126         .of_match_table = of_match_ptr(ac100_of_match),
0127     },
0128     .probe  = ac100_rsb_probe,
0129 };
0130 module_sunxi_rsb_driver(ac100_rsb_driver);
0131
0132 MODULE_DESCRIPTION("Audio codec MFD core driver for AC100");
0133 MODULE_AUTHOR("Chen-Yu Tsai <wens@csie.org>");
0134 MODULE_LICENSE("GPL v2");