1 /* 2 * MFD core driver for X-Powers' AC100 Audio Codec IC 3 * 4 * The AC100 is a highly integrated audio codec and RTC subsystem designed 5 * for mobile applications. It has 3 I2S/PCM interfaces, a 2 channel DAC, 6 * a 2 channel ADC with 5 inputs and a builtin mixer. The RTC subsystem has 7 * 3 clock outputs. 8 * 9 * The audio codec and RTC parts are completely separate, sharing only the 10 * host interface for access to its registers. 11 * 12 * Copyright (2016) Chen-Yu Tsai 13 * 14 * Author: Chen-Yu Tsai <wens@csie.org> 15 * 16 * This program is free software; you can redistribute it and/or modify 17 * it under the terms of the GNU General Public License version 2 as 18 * published by the Free Software Foundation. 19 */ 20 21 #include <linux/interrupt.h> 22 #include <linux/kernel.h> 23 #include <linux/mfd/core.h> 24 #include <linux/mfd/ac100.h> 25 #include <linux/module.h> 26 #include <linux/of.h> 27 #include <linux/regmap.h> 28 #include <linux/sunxi-rsb.h> 29 30 static const struct regmap_range ac100_writeable_ranges[] = { 31 regmap_reg_range(AC100_CHIP_AUDIO_RST, AC100_I2S_SR_CTRL), 32 regmap_reg_range(AC100_I2S1_CLK_CTRL, AC100_I2S1_MXR_GAIN), 33 regmap_reg_range(AC100_I2S2_CLK_CTRL, AC100_I2S2_MXR_GAIN), 34 regmap_reg_range(AC100_I2S3_CLK_CTRL, AC100_I2S3_SIG_PATH_CTRL), 35 regmap_reg_range(AC100_ADC_DIG_CTRL, AC100_ADC_VOL_CTRL), 36 regmap_reg_range(AC100_HMIC_CTRL1, AC100_HMIC_STATUS), 37 regmap_reg_range(AC100_DAC_DIG_CTRL, AC100_DAC_MXR_GAIN), 38 regmap_reg_range(AC100_ADC_APC_CTRL, AC100_LINEOUT_CTRL), 39 regmap_reg_range(AC100_ADC_DAP_L_CTRL, AC100_ADC_DAP_OPT), 40 regmap_reg_range(AC100_DAC_DAP_CTRL, AC100_DAC_DAP_OPT), 41 regmap_reg_range(AC100_ADC_DAP_ENA, AC100_DAC_DAP_ENA), 42 regmap_reg_range(AC100_SRC1_CTRL1, AC100_SRC1_CTRL2), 43 regmap_reg_range(AC100_SRC2_CTRL1, AC100_SRC2_CTRL2), 44 regmap_reg_range(AC100_CLK32K_ANALOG_CTRL, AC100_CLKOUT_CTRL3), 45 regmap_reg_range(AC100_RTC_RST, AC100_RTC_UPD), 46 regmap_reg_range(AC100_ALM_INT_ENA, AC100_ALM_INT_STA), 47 regmap_reg_range(AC100_ALM_SEC, AC100_RTC_GP(15)), 48 }; 49 50 static const struct regmap_range ac100_volatile_ranges[] = { 51 regmap_reg_range(AC100_CHIP_AUDIO_RST, AC100_PLL_CTRL2), 52 regmap_reg_range(AC100_HMIC_STATUS, AC100_HMIC_STATUS), 53 regmap_reg_range(AC100_ADC_DAP_L_STA, AC100_ADC_DAP_L_STA), 54 regmap_reg_range(AC100_SRC1_CTRL1, AC100_SRC1_CTRL1), 55 regmap_reg_range(AC100_SRC1_CTRL3, AC100_SRC2_CTRL1), 56 regmap_reg_range(AC100_SRC2_CTRL3, AC100_SRC2_CTRL4), 57 regmap_reg_range(AC100_RTC_RST, AC100_RTC_RST), 58 regmap_reg_range(AC100_RTC_SEC, AC100_ALM_INT_STA), 59 regmap_reg_range(AC100_ALM_SEC, AC100_ALM_UPD), 60 }; 61 62 static const struct regmap_access_table ac100_writeable_table = { 63 .yes_ranges = ac100_writeable_ranges, 64 .n_yes_ranges = ARRAY_SIZE(ac100_writeable_ranges), 65 }; 66 67 static const struct regmap_access_table ac100_volatile_table = { 68 .yes_ranges = ac100_volatile_ranges, 69 .n_yes_ranges = ARRAY_SIZE(ac100_volatile_ranges), 70 }; 71 72 static const struct regmap_config ac100_regmap_config = { 73 .reg_bits = 8, 74 .val_bits = 16, 75 .wr_table = &ac100_writeable_table, 76 .volatile_table = &ac100_volatile_table, 77 .max_register = AC100_RTC_GP(15), 78 .cache_type = REGCACHE_RBTREE, 79 }; 80 81 static struct mfd_cell ac100_cells[] = { 82 { 83 .name = "ac100-codec", 84 .of_compatible = "x-powers,ac100-codec", 85 }, { 86 .name = "ac100-rtc", 87 .of_compatible = "x-powers,ac100-rtc", 88 }, 89 }; 90 91 static int ac100_rsb_probe(struct sunxi_rsb_device *rdev) 92 { 93 struct ac100_dev *ac100; 94 int ret; 95 96 ac100 = devm_kzalloc(&rdev->dev, sizeof(*ac100), GFP_KERNEL); 97 if (!ac100) 98 return -ENOMEM; 99 100 ac100->dev = &rdev->dev; 101 sunxi_rsb_device_set_drvdata(rdev, ac100); 102 103 ac100->regmap = devm_regmap_init_sunxi_rsb(rdev, &ac100_regmap_config); 104 if (IS_ERR(ac100->regmap)) { 105 ret = PTR_ERR(ac100->regmap); 106 dev_err(ac100->dev, "regmap init failed: %d\n", ret); 107 return ret; 108 } 109 110 ret = devm_mfd_add_devices(ac100->dev, PLATFORM_DEVID_NONE, ac100_cells, 111 ARRAY_SIZE(ac100_cells), NULL, 0, NULL); 112 if (ret) { 113 dev_err(ac100->dev, "failed to add MFD devices: %d\n", ret); 114 return ret; 115 } 116 117 return 0; 118 } 119 120 static const struct of_device_id ac100_of_match[] = { 121 { .compatible = "x-powers,ac100" }, 122 { }, 123 }; 124 MODULE_DEVICE_TABLE(of, ac100_of_match); 125 126 static struct sunxi_rsb_driver ac100_rsb_driver = { 127 .driver = { 128 .name = "ac100", 129 .of_match_table = of_match_ptr(ac100_of_match), 130 }, 131 .probe = ac100_rsb_probe, 132 }; 133 module_sunxi_rsb_driver(ac100_rsb_driver); 134 135 MODULE_DESCRIPTION("Audio codec MFD core driver for AC100"); 136 MODULE_AUTHOR("Chen-Yu Tsai <wens@csie.org>"); 137 MODULE_LICENSE("GPL v2"); 138