drivers/iio/health/afe440x.h

   1 /*
   2  * AFE440X Heart Rate Monitors and Low-Cost Pulse Oximeters
   3  *
   4  * Copyright (C) 2015 Texas Instruments Incorporated - http://www.ti.com/
   5  *      Andrew F. Davis <afd@ti.com>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10  *
  11  * This program is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * General Public License for more details.
  15  */
  16
  17 #ifndef _AFE440X_H
  18 #define _AFE440X_H
  19
  20 /* AFE440X registers */
  21 #define AFE440X_CONTROL0                0x00
  22 #define AFE440X_LED2STC                 0x01
  23 #define AFE440X_LED2ENDC                0x02
  24 #define AFE440X_LED1LEDSTC              0x03
  25 #define AFE440X_LED1LEDENDC             0x04
  26 #define AFE440X_ALED2STC                0x05
  27 #define AFE440X_ALED2ENDC               0x06
  28 #define AFE440X_LED1STC                 0x07
  29 #define AFE440X_LED1ENDC                0x08
  30 #define AFE440X_LED2LEDSTC              0x09
  31 #define AFE440X_LED2LEDENDC             0x0a
  32 #define AFE440X_ALED1STC                0x0b
  33 #define AFE440X_ALED1ENDC               0x0c
  34 #define AFE440X_LED2CONVST              0x0d
  35 #define AFE440X_LED2CONVEND             0x0e
  36 #define AFE440X_ALED2CONVST             0x0f
  37 #define AFE440X_ALED2CONVEND            0x10
  38 #define AFE440X_LED1CONVST              0x11
  39 #define AFE440X_LED1CONVEND             0x12
  40 #define AFE440X_ALED1CONVST             0x13
  41 #define AFE440X_ALED1CONVEND            0x14
  42 #define AFE440X_ADCRSTSTCT0             0x15
  43 #define AFE440X_ADCRSTENDCT0            0x16
  44 #define AFE440X_ADCRSTSTCT1             0x17
  45 #define AFE440X_ADCRSTENDCT1            0x18
  46 #define AFE440X_ADCRSTSTCT2             0x19
  47 #define AFE440X_ADCRSTENDCT2            0x1a
  48 #define AFE440X_ADCRSTSTCT3             0x1b
  49 #define AFE440X_ADCRSTENDCT3            0x1c
  50 #define AFE440X_PRPCOUNT                0x1d
  51 #define AFE440X_CONTROL1                0x1e
  52 #define AFE440X_LEDCNTRL                0x22
  53 #define AFE440X_CONTROL2                0x23
  54 #define AFE440X_ALARM                   0x29
  55 #define AFE440X_LED2VAL                 0x2a
  56 #define AFE440X_ALED2VAL                0x2b
  57 #define AFE440X_LED1VAL                 0x2c
  58 #define AFE440X_ALED1VAL                0x2d
  59 #define AFE440X_LED2_ALED2VAL           0x2e
  60 #define AFE440X_LED1_ALED1VAL           0x2f
  61 #define AFE440X_CONTROL3                0x31
  62 #define AFE440X_PDNCYCLESTC             0x32
  63 #define AFE440X_PDNCYCLEENDC            0x33
  64
  65 /* CONTROL0 register fields */
  66 #define AFE440X_CONTROL0_REG_READ       BIT(0)
  67 #define AFE440X_CONTROL0_TM_COUNT_RST   BIT(1)
  68 #define AFE440X_CONTROL0_SW_RESET       BIT(3)
  69
  70 /* CONTROL1 register fields */
  71 #define AFE440X_CONTROL1_TIMEREN        BIT(8)
  72
  73 /* TIAGAIN register fields */
  74 #define AFE440X_TIAGAIN_ENSEPGAIN       BIT(15)
  75
  76 /* CONTROL2 register fields */
  77 #define AFE440X_CONTROL2_PDN_AFE        BIT(0)
  78 #define AFE440X_CONTROL2_PDN_RX         BIT(1)
  79 #define AFE440X_CONTROL2_DYNAMIC4       BIT(3)
  80 #define AFE440X_CONTROL2_DYNAMIC3       BIT(4)
  81 #define AFE440X_CONTROL2_DYNAMIC2       BIT(14)
  82 #define AFE440X_CONTROL2_DYNAMIC1       BIT(20)
  83
  84 /* CONTROL3 register fields */
  85 #define AFE440X_CONTROL3_CLKDIV         GENMASK(2, 0)
  86
  87 /* CONTROL0 values */
  88 #define AFE440X_CONTROL0_WRITE          0x0
  89 #define AFE440X_CONTROL0_READ           0x1
  90
  91 #define AFE440X_INTENSITY_CHAN(_index, _mask)                   \
  92         {                                                       \
  93                 .type = IIO_INTENSITY,                          \
  94                 .channel = _index,                              \
  95                 .address = _index,                              \
  96                 .scan_index = _index,                           \
  97                 .scan_type = {                                  \
  98                                 .sign = 's',                    \
  99                                 .realbits = 24,                 \
 100                                 .storagebits = 32,              \
 101                                 .endianness = IIO_CPU,          \
 102                 },                                              \
 103                 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |  \
 104                         _mask,                                  \
 105                 .indexed = true,                                \
 106         }
 107
 108 #define AFE440X_CURRENT_CHAN(_index)                            \
 109         {                                                       \
 110                 .type = IIO_CURRENT,                            \
 111                 .channel = _index,                              \
 112                 .address = _index,                              \
 113                 .scan_index = -1,                               \
 114                 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |  \
 115                         BIT(IIO_CHAN_INFO_SCALE),               \
 116                 .indexed = true,                                \
 117                 .output = true,                                 \
 118         }
 119
 120 struct afe440x_val_table {
 121         int integer;
 122         int fract;
 123 };
 124
 125 #define AFE440X_TABLE_ATTR(_name, _table)                               \
 126 static ssize_t _name ## _show(struct device *dev,                       \
 127                               struct device_attribute *attr, char *buf) \
 128 {                                                                       \
 129         ssize_t len = 0;                                                \
 130         int i;                                                          \
 131                                                                         \
 132         for (i = 0; i < ARRAY_SIZE(_table); i++)                        \
 133                 len += scnprintf(buf + len, PAGE_SIZE - len, "%d.%06u ", \
 134                                  _table[i].integer,                     \
 135                                  _table[i].fract);                      \
 136                                                                         \
 137         buf[len - 1] = '\n';                                            \
 138                                                                         \
 139         return len;                                                     \
 140 }                                                                       \
 141 static DEVICE_ATTR_RO(_name)
 142
 143 struct afe440x_attr {
 144         struct device_attribute dev_attr;
 145         unsigned int field;
 146         const struct afe440x_val_table *val_table;
 147         unsigned int table_size;
 148 };
 149
 150 #define to_afe440x_attr(_dev_attr)                              \
 151         container_of(_dev_attr, struct afe440x_attr, dev_attr)
 152
 153 #define AFE440X_ATTR(_name, _field, _table)                     \
 154         struct afe440x_attr afe440x_attr_##_name = {            \
 155                 .dev_attr = __ATTR(_name, (S_IRUGO | S_IWUSR),  \
 156                                    afe440x_show_register,       \
 157                                    afe440x_store_register),     \
 158                 .field = _field,                                \
 159                 .val_table = _table,                            \
 160                 .table_size = ARRAY_SIZE(_table),               \
 161         }
 162
 163 #endif /* _AFE440X_H */