drivers/misc/ad525x_dpot.h

   1 /*
   2  * Driver for the Analog Devices digital potentiometers
   3  *
   4  * Copyright (C) 2010 Michael Hennerich, Analog Devices Inc.
   5  *
   6  * Licensed under the GPL-2 or later.
   7  */
   8
   9 #ifndef _AD_DPOT_H_
  10 #define _AD_DPOT_H_
  11
  12 #include <linux/types.h>
  13
  14 #define DPOT_CONF(features, wipers, max_pos, uid) \
  15                 (((features) << 18) | (((wipers) & 0xFF) << 10) | \
  16                 ((max_pos & 0xF) << 6) | (uid & 0x3F))
  17
  18 #define DPOT_UID(conf) (conf & 0x3F)
  19 #define DPOT_MAX_POS(conf) ((conf >> 6) & 0xF)
  20 #define DPOT_WIPERS(conf) ((conf >> 10) & 0xFF)
  21 #define DPOT_FEAT(conf) (conf >> 18)
  22
  23 #define BRDAC0  (1 << 0)
  24 #define BRDAC1  (1 << 1)
  25 #define BRDAC2  (1 << 2)
  26 #define BRDAC3  (1 << 3)
  27 #define BRDAC4  (1 << 4)
  28 #define BRDAC5  (1 << 5)
  29
  30 #define F_CMD_INC               (1 << 0)        /* Features INC/DEC ALL, 6dB */
  31 #define F_CMD_EEP               (1 << 1)        /* Features EEPROM */
  32 #define F_CMD_OTP               (1 << 2)        /* Features OTP */
  33 #define F_CMD_TOL               (1 << 3)        /* RDACS feature Tolerance REG */
  34 #define F_RDACS_RW              (1 << 4)        /* RDACS are Read/Write  */
  35 #define F_RDACS_WONLY           (1 << 5)        /* RDACS are Write only */
  36 #define F_AD_APPDATA            (1 << 6)        /* RDAC Address append to data */
  37 #define F_SPI_8BIT              (1 << 7)        /* All SPI XFERS are 8-bit */
  38 #define F_SPI_16BIT             (1 << 8)        /* All SPI XFERS are 16-bit */
  39 #define F_SPI_24BIT             (1 << 9)        /* All SPI XFERS are 24-bit */
  40
  41 #define F_RDACS_RW_TOL  (F_RDACS_RW | F_CMD_EEP | F_CMD_TOL)
  42 #define F_RDACS_RW_EEP  (F_RDACS_RW | F_CMD_EEP)
  43 #define F_SPI           (F_SPI_8BIT | F_SPI_16BIT | F_SPI_24BIT)
  44
  45 enum dpot_devid {
  46         AD5258_ID = DPOT_CONF(F_RDACS_RW_TOL, BRDAC0, 6, 0), /* I2C */
  47         AD5259_ID = DPOT_CONF(F_RDACS_RW_TOL, BRDAC0, 8, 1),
  48         AD5251_ID = DPOT_CONF(F_RDACS_RW_TOL | F_CMD_INC,
  49                         BRDAC0 | BRDAC3, 6, 2),
  50         AD5252_ID = DPOT_CONF(F_RDACS_RW_TOL | F_CMD_INC,
  51                         BRDAC0 | BRDAC3, 8, 3),
  52         AD5253_ID = DPOT_CONF(F_RDACS_RW_TOL | F_CMD_INC,
  53                         BRDAC0 | BRDAC1 | BRDAC2 | BRDAC3, 6, 4),
  54         AD5254_ID = DPOT_CONF(F_RDACS_RW_TOL | F_CMD_INC,
  55                         BRDAC0 | BRDAC1 | BRDAC2 | BRDAC3, 8, 5),
  56         AD5255_ID = DPOT_CONF(F_RDACS_RW_TOL | F_CMD_INC,
  57                         BRDAC0 | BRDAC1 | BRDAC2, 9, 6),
  58         AD5160_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_8BIT,
  59                         BRDAC0, 8, 7), /* SPI */
  60         AD5161_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_8BIT,
  61                         BRDAC0, 8, 8),
  62         AD5162_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_16BIT,
  63                         BRDAC0 | BRDAC1, 8, 9),
  64         AD5165_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_8BIT,
  65                         BRDAC0, 8, 10),
  66         AD5200_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_8BIT,
  67                         BRDAC0, 8, 11),
  68         AD5201_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_8BIT,
  69                         BRDAC0, 5, 12),
  70         AD5203_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_8BIT,
  71                         BRDAC0 | BRDAC1 | BRDAC2 | BRDAC3, 6, 13),
  72         AD5204_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_16BIT,
  73                         BRDAC0 | BRDAC1 | BRDAC2 | BRDAC3, 8, 14),
  74         AD5206_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_16BIT,
  75                         BRDAC0 | BRDAC1 | BRDAC2 | BRDAC3 | BRDAC4 | BRDAC5,
  76                         8, 15),
  77         AD5207_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_16BIT,
  78                         BRDAC0 | BRDAC1, 8, 16),
  79         AD5231_ID = DPOT_CONF(F_RDACS_RW_EEP | F_CMD_INC | F_SPI_24BIT,
  80                         BRDAC0, 10, 17),
  81         AD5232_ID = DPOT_CONF(F_RDACS_RW_EEP | F_CMD_INC | F_SPI_16BIT,
  82                         BRDAC0 | BRDAC1, 8, 18),
  83         AD5233_ID = DPOT_CONF(F_RDACS_RW_EEP | F_CMD_INC | F_SPI_16BIT,
  84                         BRDAC0 | BRDAC1 | BRDAC2 | BRDAC3, 6, 19),
  85         AD5235_ID = DPOT_CONF(F_RDACS_RW_EEP | F_CMD_INC | F_SPI_24BIT,
  86                         BRDAC0 | BRDAC1, 10, 20),
  87         AD5260_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_8BIT,
  88                         BRDAC0, 8, 21),
  89         AD5262_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_16BIT,
  90                         BRDAC0 | BRDAC1, 8, 22),
  91         AD5263_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_16BIT,
  92                         BRDAC0 | BRDAC1 | BRDAC2 | BRDAC3, 8, 23),
  93         AD5290_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_8BIT,
  94                         BRDAC0, 8, 24),
  95         AD5291_ID = DPOT_CONF(F_RDACS_RW | F_SPI_16BIT, BRDAC0, 8, 25),
  96         AD5292_ID = DPOT_CONF(F_RDACS_RW | F_SPI_16BIT, BRDAC0, 10, 26),
  97         AD5293_ID = DPOT_CONF(F_RDACS_RW | F_SPI_16BIT, BRDAC0, 10, 27),
  98         AD7376_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_8BIT,
  99                         BRDAC0, 7, 28),
 100         AD8400_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_8BIT,
 101                         BRDAC0, 8, 29),
 102         AD8402_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_16BIT,
 103                         BRDAC0 | BRDAC1, 8, 30),
 104         AD8403_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_16BIT,
 105                         BRDAC0 | BRDAC1 | BRDAC2, 8, 31),
 106         ADN2850_ID = DPOT_CONF(F_RDACS_RW_EEP | F_CMD_INC | F_SPI_24BIT,
 107                         BRDAC0 | BRDAC1, 10, 32),
 108         AD5241_ID = DPOT_CONF(F_RDACS_RW, BRDAC0, 8, 33),
 109         AD5242_ID = DPOT_CONF(F_RDACS_RW, BRDAC0 | BRDAC1, 8, 34),
 110         AD5243_ID = DPOT_CONF(F_RDACS_RW, BRDAC0 | BRDAC1, 8, 35),
 111         AD5245_ID = DPOT_CONF(F_RDACS_RW, BRDAC0, 8, 36),
 112         AD5246_ID = DPOT_CONF(F_RDACS_RW, BRDAC0, 7, 37),
 113         AD5247_ID = DPOT_CONF(F_RDACS_RW, BRDAC0, 7, 38),
 114         AD5248_ID = DPOT_CONF(F_RDACS_RW, BRDAC0 | BRDAC1, 8, 39),
 115         AD5280_ID = DPOT_CONF(F_RDACS_RW, BRDAC0, 8, 40),
 116         AD5282_ID = DPOT_CONF(F_RDACS_RW, BRDAC0 | BRDAC1, 8, 41),
 117         ADN2860_ID = DPOT_CONF(F_RDACS_RW_TOL | F_CMD_INC,
 118                         BRDAC0 | BRDAC1 | BRDAC2, 9, 42),
 119 };
 120
 121 #define DPOT_RDAC0              0
 122 #define DPOT_RDAC1              1
 123 #define DPOT_RDAC2              2
 124 #define DPOT_RDAC3              3
 125 #define DPOT_RDAC4              4
 126 #define DPOT_RDAC5              5
 127
 128 #define DPOT_RDAC_MASK          0x1F
 129
 130 #define DPOT_REG_TOL            0x18
 131 #define DPOT_TOL_RDAC0          (DPOT_REG_TOL | DPOT_RDAC0)
 132 #define DPOT_TOL_RDAC1          (DPOT_REG_TOL | DPOT_RDAC1)
 133 #define DPOT_TOL_RDAC2          (DPOT_REG_TOL | DPOT_RDAC2)
 134 #define DPOT_TOL_RDAC3          (DPOT_REG_TOL | DPOT_RDAC3)
 135 #define DPOT_TOL_RDAC4          (DPOT_REG_TOL | DPOT_RDAC4)
 136 #define DPOT_TOL_RDAC5          (DPOT_REG_TOL | DPOT_RDAC5)
 137
 138 /* RDAC-to-EEPROM Interface Commands */
 139 #define DPOT_ADDR_RDAC          (0x00 << 5)
 140 #define DPOT_ADDR_EEPROM        (0x01 << 5)
 141 #define DPOT_ADDR_CMD           (0x80)
 142
 143 #define DPOT_DEC_ALL_6DB        (DPOT_ADDR_CMD | (0x4 << 3))
 144 #define DPOT_INC_ALL_6DB        (DPOT_ADDR_CMD | (0x9 << 3))
 145 #define DPOT_DEC_ALL            (DPOT_ADDR_CMD | (0x6 << 3))
 146 #define DPOT_INC_ALL            (DPOT_ADDR_CMD | (0xB << 3))
 147
 148 #define DPOT_SPI_RDAC           0xB0
 149 #define DPOT_SPI_EEPROM         0x30
 150 #define DPOT_SPI_READ_RDAC      0xA0
 151 #define DPOT_SPI_READ_EEPROM    0x90
 152 #define DPOT_SPI_DEC_ALL_6DB    0x50
 153 #define DPOT_SPI_INC_ALL_6DB    0xD0
 154 #define DPOT_SPI_DEC_ALL        0x70
 155 #define DPOT_SPI_INC_ALL        0xF0
 156
 157 /* AD5291/2/3 use special commands */
 158 #define DPOT_AD5291_RDAC        0x01
 159 #define DPOT_AD5291_READ_RDAC   0x02
 160
 161 /* AD524x use special commands */
 162 #define DPOT_AD5291_RDAC_AB     0x80
 163
 164 struct dpot_data;
 165
 166 struct ad_dpot_bus_ops {
 167         int (*read_d8) (void *client);
 168         int (*read_r8d8) (void *client, u8 reg);
 169         int (*read_r8d16) (void *client, u8 reg);
 170         int (*write_d8) (void *client, u8 val);
 171         int (*write_r8d8) (void *client, u8 reg, u8 val);
 172         int (*write_r8d16) (void *client, u8 reg, u16 val);
 173 };
 174
 175 struct ad_dpot_bus_data {
 176         void *client;
 177         const struct ad_dpot_bus_ops *bops;
 178 };
 179
 180 struct ad_dpot_id {
 181         char *name;
 182         unsigned long devid;
 183 };
 184
 185 int ad_dpot_probe(struct device *dev, struct ad_dpot_bus_data *bdata, const struct ad_dpot_id *id);
 186 int ad_dpot_remove(struct device *dev);
 187
 188 #endif