1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * This file is part of AD5686 DAC driver 4 * 5 * Copyright 2018 Analog Devices Inc. 6 */ 7 8 #ifndef __DRIVERS_IIO_DAC_AD5686_H__ 9 #define __DRIVERS_IIO_DAC_AD5686_H__ 10 11 #include <linux/types.h> 12 #include <linux/cache.h> 13 #include <linux/mutex.h> 14 #include <linux/kernel.h> 15 16 #define AD5310_CMD(x) ((x) << 12) 17 18 #define AD5683_DATA(x) ((x) << 4) 19 20 #define AD5686_ADDR(x) ((x) << 16) 21 #define AD5686_CMD(x) ((x) << 20) 22 23 #define AD5686_ADDR_DAC(chan) (0x1 << (chan)) 24 #define AD5686_ADDR_ALL_DAC 0xF 25 26 #define AD5686_CMD_NOOP 0x0 27 #define AD5686_CMD_WRITE_INPUT_N 0x1 28 #define AD5686_CMD_UPDATE_DAC_N 0x2 29 #define AD5686_CMD_WRITE_INPUT_N_UPDATE_N 0x3 30 #define AD5686_CMD_POWERDOWN_DAC 0x4 31 #define AD5686_CMD_LDAC_MASK 0x5 32 #define AD5686_CMD_RESET 0x6 33 #define AD5686_CMD_INTERNAL_REFER_SETUP 0x7 34 #define AD5686_CMD_DAISY_CHAIN_ENABLE 0x8 35 #define AD5686_CMD_READBACK_ENABLE 0x9 36 37 #define AD5686_LDAC_PWRDN_NONE 0x0 38 #define AD5686_LDAC_PWRDN_1K 0x1 39 #define AD5686_LDAC_PWRDN_100K 0x2 40 #define AD5686_LDAC_PWRDN_3STATE 0x3 41 42 #define AD5686_CMD_CONTROL_REG 0x4 43 #define AD5686_CMD_READBACK_ENABLE_V2 0x5 44 45 #define AD5310_REF_BIT_MSK BIT(8) 46 #define AD5683_REF_BIT_MSK BIT(12) 47 #define AD5693_REF_BIT_MSK BIT(12) 48 49 /** 50 * ad5686_supported_device_ids: 51 */ 52 enum ad5686_supported_device_ids { 53 ID_AD5310R, 54 ID_AD5311R, 55 ID_AD5671R, 56 ID_AD5672R, 57 ID_AD5674R, 58 ID_AD5675R, 59 ID_AD5676, 60 ID_AD5676R, 61 ID_AD5679R, 62 ID_AD5681R, 63 ID_AD5682R, 64 ID_AD5683, 65 ID_AD5683R, 66 ID_AD5684, 67 ID_AD5684R, 68 ID_AD5685R, 69 ID_AD5686, 70 ID_AD5686R, 71 ID_AD5691R, 72 ID_AD5692R, 73 ID_AD5693, 74 ID_AD5693R, 75 ID_AD5694, 76 ID_AD5694R, 77 ID_AD5695R, 78 ID_AD5696, 79 ID_AD5696R, 80 }; 81 82 enum ad5686_regmap_type { 83 AD5310_REGMAP, 84 AD5683_REGMAP, 85 AD5686_REGMAP, 86 AD5693_REGMAP 87 }; 88 89 struct ad5686_state; 90 91 typedef int (*ad5686_write_func)(struct ad5686_state *st, 92 u8 cmd, u8 addr, u16 val); 93 94 typedef int (*ad5686_read_func)(struct ad5686_state *st, u8 addr); 95 96 /** 97 * struct ad5686_chip_info - chip specific information 98 * @int_vref_mv: AD5620/40/60: the internal reference voltage 99 * @num_channels: number of channels 100 * @channel: channel specification 101 * @regmap_type: register map layout variant 102 */ 103 104 struct ad5686_chip_info { 105 u16 int_vref_mv; 106 unsigned int num_channels; 107 struct iio_chan_spec *channels; 108 enum ad5686_regmap_type regmap_type; 109 }; 110 111 /** 112 * struct ad5446_state - driver instance specific data 113 * @spi: spi_device 114 * @chip_info: chip model specific constants, available modes etc 115 * @reg: supply regulator 116 * @vref_mv: actual reference voltage used 117 * @pwr_down_mask: power down mask 118 * @pwr_down_mode: current power down mode 119 * @use_internal_vref: set to true if the internal reference voltage is used 120 * @lock lock to protect the data buffer during regmap ops 121 * @data: spi transfer buffers 122 */ 123 124 struct ad5686_state { 125 struct device *dev; 126 const struct ad5686_chip_info *chip_info; 127 struct regulator *reg; 128 unsigned short vref_mv; 129 unsigned int pwr_down_mask; 130 unsigned int pwr_down_mode; 131 ad5686_write_func write; 132 ad5686_read_func read; 133 bool use_internal_vref; 134 struct mutex lock; 135 136 /* 137 * DMA (thus cache coherency maintenance) requires the 138 * transfer buffers to live in their own cache lines. 139 */ 140 141 union { 142 __be32 d32; 143 __be16 d16; 144 u8 d8[4]; 145 } data[3] ____cacheline_aligned; 146 }; 147 148 149 int ad5686_probe(struct device *dev, 150 enum ad5686_supported_device_ids chip_type, 151 const char *name, ad5686_write_func write, 152 ad5686_read_func read); 153 154 int ad5686_remove(struct device *dev); 155 156 157 #endif /* __DRIVERS_IIO_DAC_AD5686_H__ */ 158