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 #define MAX_RDACS               6
  30
  31 #define F_CMD_INC               (1 << 0)        /* Features INC/DEC ALL, 6dB */
  32 #define F_CMD_EEP               (1 << 1)        /* Features EEPROM */
  33 #define F_CMD_OTP               (1 << 2)        /* Features OTP */
  34 #define F_CMD_TOL               (1 << 3)        /* RDACS feature Tolerance REG */
  35 #define F_RDACS_RW              (1 << 4)        /* RDACS are Read/Write  */
  36 #define F_RDACS_WONLY           (1 << 5)        /* RDACS are Write only */
  37 #define F_AD_APPDATA            (1 << 6)        /* RDAC Address append to data */
  38 #define F_SPI_8BIT              (1 << 7)        /* All SPI XFERS are 8-bit */
  39 #define F_SPI_16BIT             (1 << 8)        /* All SPI XFERS are 16-bit */
  40 #define F_SPI_24BIT             (1 << 9)        /* All SPI XFERS are 24-bit */
  41
  42 #define F_RDACS_RW_TOL  (F_RDACS_RW | F_CMD_EEP | F_CMD_TOL)
  43 #define F_RDACS_RW_EEP  (F_RDACS_RW | F_CMD_EEP)
  44 #define F_SPI           (F_SPI_8BIT | F_SPI_16BIT | F_SPI_24BIT)
  45
  46 enum dpot_devid {
  47         AD5258_ID = DPOT_CONF(F_RDACS_RW_TOL, BRDAC0, 6, 0), /* I2C */
  48         AD5259_ID = DPOT_CONF(F_RDACS_RW_TOL, BRDAC0, 8, 1),
  49         AD5251_ID = DPOT_CONF(F_RDACS_RW_TOL | F_CMD_INC,
  50                         BRDAC1 | BRDAC3, 6, 2),
  51         AD5252_ID = DPOT_CONF(F_RDACS_RW_TOL | F_CMD_INC,
  52                         BRDAC1 | BRDAC3, 8, 3),
  53         AD5253_ID = DPOT_CONF(F_RDACS_RW_TOL | F_CMD_INC,
  54                         BRDAC0 | BRDAC1 | BRDAC2 | BRDAC3, 6, 4),
  55         AD5254_ID = DPOT_CONF(F_RDACS_RW_TOL | F_CMD_INC,
  56                         BRDAC0 | BRDAC1 | BRDAC2 | BRDAC3, 8, 5),
  57         AD5255_ID = DPOT_CONF(F_RDACS_RW_TOL | F_CMD_INC,
  58                         BRDAC0 | BRDAC1 | BRDAC2, 9, 6),
  59         AD5160_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_8BIT,
  60                         BRDAC0, 8, 7), /* SPI */
  61         AD5161_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_8BIT,
  62                         BRDAC0, 8, 8),
  63         AD5162_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_16BIT,
  64                         BRDAC0 | BRDAC1, 8, 9),
  65         AD5165_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_8BIT,
  66                         BRDAC0, 8, 10),
  67         AD5200_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_8BIT,
  68                         BRDAC0, 8, 11),
  69         AD5201_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_8BIT,
  70                         BRDAC0, 5, 12),
  71         AD5203_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_8BIT,
  72                         BRDAC0 | BRDAC1 | BRDAC2 | BRDAC3, 6, 13),
  73         AD5204_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_16BIT,
  74                         BRDAC0 | BRDAC1 | BRDAC2 | BRDAC3, 8, 14),
  75         AD5206_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_16BIT,
  76                         BRDAC0 | BRDAC1 | BRDAC2 | BRDAC3 | BRDAC4 | BRDAC5,
  77                         8, 15),
  78         AD5207_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_16BIT,
  79                         BRDAC0 | BRDAC1, 8, 16),
  80         AD5231_ID = DPOT_CONF(F_RDACS_RW_EEP | F_CMD_INC | F_SPI_24BIT,
  81                         BRDAC0, 10, 17),
  82         AD5232_ID = DPOT_CONF(F_RDACS_RW_EEP | F_CMD_INC | F_SPI_16BIT,
  83                         BRDAC0 | BRDAC1, 8, 18),
  84         AD5233_ID = DPOT_CONF(F_RDACS_RW_EEP | F_CMD_INC | F_SPI_16BIT,
  85                         BRDAC0 | BRDAC1 | BRDAC2 | BRDAC3, 6, 19),
  86         AD5235_ID = DPOT_CONF(F_RDACS_RW_EEP | F_CMD_INC | F_SPI_24BIT,
  87                         BRDAC0 | BRDAC1, 10, 20),
  88         AD5260_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_8BIT,
  89                         BRDAC0, 8, 21),
  90         AD5262_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_16BIT,
  91                         BRDAC0 | BRDAC1, 8, 22),
  92         AD5263_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_16BIT,
  93                         BRDAC0 | BRDAC1 | BRDAC2 | BRDAC3, 8, 23),
  94         AD5290_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_8BIT,
  95                         BRDAC0, 8, 24),
  96         AD5291_ID = DPOT_CONF(F_RDACS_RW | F_SPI_16BIT | F_CMD_OTP,
  97                         BRDAC0, 8, 25),
  98         AD5292_ID = DPOT_CONF(F_RDACS_RW | F_SPI_16BIT | F_CMD_OTP,
  99                         BRDAC0, 10, 26),
 100         AD5293_ID = DPOT_CONF(F_RDACS_RW | F_SPI_16BIT, BRDAC0, 10, 27),
 101         AD7376_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_8BIT,
 102                         BRDAC0, 7, 28),
 103         AD8400_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_8BIT,
 104                         BRDAC0, 8, 29),
 105         AD8402_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_16BIT,
 106                         BRDAC0 | BRDAC1, 8, 30),
 107         AD8403_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_16BIT,
 108                         BRDAC0 | BRDAC1 | BRDAC2, 8, 31),
 109         ADN2850_ID = DPOT_CONF(F_RDACS_RW_EEP | F_CMD_INC | F_SPI_24BIT,
 110                         BRDAC0 | BRDAC1, 10, 32),
 111         AD5241_ID = DPOT_CONF(F_RDACS_RW, BRDAC0, 8, 33),
 112         AD5242_ID = DPOT_CONF(F_RDACS_RW, BRDAC0 | BRDAC1, 8, 34),
 113         AD5243_ID = DPOT_CONF(F_RDACS_RW, BRDAC0 | BRDAC1, 8, 35),
 114         AD5245_ID = DPOT_CONF(F_RDACS_RW, BRDAC0, 8, 36),
 115         AD5246_ID = DPOT_CONF(F_RDACS_RW, BRDAC0, 7, 37),
 116         AD5247_ID = DPOT_CONF(F_RDACS_RW, BRDAC0, 7, 38),
 117         AD5248_ID = DPOT_CONF(F_RDACS_RW, BRDAC0 | BRDAC1, 8, 39),
 118         AD5280_ID = DPOT_CONF(F_RDACS_RW, BRDAC0, 8, 40),
 119         AD5282_ID = DPOT_CONF(F_RDACS_RW, BRDAC0 | BRDAC1, 8, 41),
 120         ADN2860_ID = DPOT_CONF(F_RDACS_RW_TOL | F_CMD_INC,
 121                         BRDAC0 | BRDAC1 | BRDAC2, 9, 42),
 122         AD5273_ID = DPOT_CONF(F_RDACS_RW | F_CMD_OTP, BRDAC0, 6, 43),
 123         AD5171_ID = DPOT_CONF(F_RDACS_RW | F_CMD_OTP, BRDAC0, 6, 44),
 124         AD5170_ID = DPOT_CONF(F_RDACS_RW | F_CMD_OTP, BRDAC0, 8, 45),
 125         AD5172_ID = DPOT_CONF(F_RDACS_RW | F_CMD_OTP, BRDAC0 | BRDAC1, 8, 46),
 126         AD5173_ID = DPOT_CONF(F_RDACS_RW | F_CMD_OTP, BRDAC0 | BRDAC1, 8, 47),
 127         AD5270_ID = DPOT_CONF(F_RDACS_RW | F_CMD_OTP | F_SPI_16BIT,
 128                         BRDAC0, 10, 48),
 129         AD5271_ID = DPOT_CONF(F_RDACS_RW | F_CMD_OTP | F_SPI_16BIT,
 130                         BRDAC0, 8, 49),
 131         AD5272_ID = DPOT_CONF(F_RDACS_RW | F_CMD_OTP, BRDAC0, 10, 50),
 132         AD5274_ID = DPOT_CONF(F_RDACS_RW | F_CMD_OTP, BRDAC0, 8, 51),
 133 };
 134
 135 #define DPOT_RDAC0              0
 136 #define DPOT_RDAC1              1
 137 #define DPOT_RDAC2              2
 138 #define DPOT_RDAC3              3
 139 #define DPOT_RDAC4              4
 140 #define DPOT_RDAC5              5
 141
 142 #define DPOT_RDAC_MASK          0x1F
 143
 144 #define DPOT_REG_TOL            0x18
 145 #define DPOT_TOL_RDAC0          (DPOT_REG_TOL | DPOT_RDAC0)
 146 #define DPOT_TOL_RDAC1          (DPOT_REG_TOL | DPOT_RDAC1)
 147 #define DPOT_TOL_RDAC2          (DPOT_REG_TOL | DPOT_RDAC2)
 148 #define DPOT_TOL_RDAC3          (DPOT_REG_TOL | DPOT_RDAC3)
 149 #define DPOT_TOL_RDAC4          (DPOT_REG_TOL | DPOT_RDAC4)
 150 #define DPOT_TOL_RDAC5          (DPOT_REG_TOL | DPOT_RDAC5)
 151
 152 /* RDAC-to-EEPROM Interface Commands */
 153 #define DPOT_ADDR_RDAC          (0x0 << 5)
 154 #define DPOT_ADDR_EEPROM        (0x1 << 5)
 155 #define DPOT_ADDR_OTP           (0x1 << 6)
 156 #define DPOT_ADDR_CMD           (0x1 << 7)
 157 #define DPOT_ADDR_OTP_EN        (0x1 << 9)
 158
 159 #define DPOT_DEC_ALL_6DB        (DPOT_ADDR_CMD | (0x4 << 3))
 160 #define DPOT_INC_ALL_6DB        (DPOT_ADDR_CMD | (0x9 << 3))
 161 #define DPOT_DEC_ALL            (DPOT_ADDR_CMD | (0x6 << 3))
 162 #define DPOT_INC_ALL            (DPOT_ADDR_CMD | (0xB << 3))
 163
 164 #define DPOT_SPI_RDAC           0xB0
 165 #define DPOT_SPI_EEPROM         0x30
 166 #define DPOT_SPI_READ_RDAC      0xA0
 167 #define DPOT_SPI_READ_EEPROM    0x90
 168 #define DPOT_SPI_DEC_ALL_6DB    0x50
 169 #define DPOT_SPI_INC_ALL_6DB    0xD0
 170 #define DPOT_SPI_DEC_ALL        0x70
 171 #define DPOT_SPI_INC_ALL        0xF0
 172
 173 /* AD5291/2/3 use special commands */
 174 #define DPOT_AD5291_RDAC        0x01
 175 #define DPOT_AD5291_READ_RDAC   0x02
 176 #define DPOT_AD5291_STORE_XTPM  0x03
 177 #define DPOT_AD5291_CTRLREG     0x06
 178 #define DPOT_AD5291_UNLOCK_CMD  0x03
 179
 180 /* AD5270/1/2/4 use special commands */
 181 #define DPOT_AD5270_1_2_4_RDAC          0x01
 182 #define DPOT_AD5270_1_2_4_READ_RDAC     0x02
 183 #define DPOT_AD5270_1_2_4_STORE_XTPM    0x03
 184 #define DPOT_AD5270_1_2_4_CTRLREG       0x07
 185 #define DPOT_AD5270_1_2_4_UNLOCK_CMD    0x03
 186
 187 #define DPOT_AD5282_RDAC_AB     0x80
 188
 189 #define DPOT_AD5273_FUSE        0x80
 190 #define DPOT_AD5170_2_3_FUSE    0x20
 191 #define DPOT_AD5170_2_3_OW      0x08
 192 #define DPOT_AD5172_3_A0        0x08
 193 #define DPOT_AD5170_2FUSE       0x80
 194
 195 struct dpot_data;
 196
 197 struct ad_dpot_bus_ops {
 198         int (*read_d8) (void *client);
 199         int (*read_r8d8) (void *client, u8 reg);
 200         int (*read_r8d16) (void *client, u8 reg);
 201         int (*write_d8) (void *client, u8 val);
 202         int (*write_r8d8) (void *client, u8 reg, u8 val);
 203         int (*write_r8d16) (void *client, u8 reg, u16 val);
 204 };
 205
 206 struct ad_dpot_bus_data {
 207         void *client;
 208         const struct ad_dpot_bus_ops *bops;
 209 };
 210
 211 struct ad_dpot_id {
 212         char *name;
 213         unsigned long devid;
 214 };
 215
 216 int ad_dpot_probe(struct device *dev, struct ad_dpot_bus_data *bdata, const struct ad_dpot_id *id);
 217 int ad_dpot_remove(struct device *dev);
 218
 219 #endif