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 27 static 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 47 static 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 59 static 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 64 static 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 69 static 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 78 static 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 88 static 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 } 116 117 static const struct of_device_id ac100_of_match[] = { 118 { .compatible = "x-powers,ac100" }, 119 { }, 120 }; 121 MODULE_DEVICE_TABLE(of, ac100_of_match); 122 123 static 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 }; 130 module_sunxi_rsb_driver(ac100_rsb_driver); 131 132 MODULE_DESCRIPTION("Audio codec MFD core driver for AC100"); 133 MODULE_AUTHOR("Chen-Yu Tsai <wens@csie.org>"); 134 MODULE_LICENSE("GPL v2"); 135