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/*
* AFE440X Heart Rate Monitors and Low-Cost Pulse Oximeters
*
* Copyright (C) 2015 Texas Instruments Incorporated - http://www.ti.com/
* Andrew F. Davis <afd@ti.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*/
#ifndef _AFE440X_H
#define _AFE440X_H
/* AFE440X registers */
#define AFE440X_CONTROL0 0x00
#define AFE440X_LED2STC 0x01
#define AFE440X_LED2ENDC 0x02
#define AFE440X_LED1LEDSTC 0x03
#define AFE440X_LED1LEDENDC 0x04
#define AFE440X_ALED2STC 0x05
#define AFE440X_ALED2ENDC 0x06
#define AFE440X_LED1STC 0x07
#define AFE440X_LED1ENDC 0x08
#define AFE440X_LED2LEDSTC 0x09
#define AFE440X_LED2LEDENDC 0x0a
#define AFE440X_ALED1STC 0x0b
#define AFE440X_ALED1ENDC 0x0c
#define AFE440X_LED2CONVST 0x0d
#define AFE440X_LED2CONVEND 0x0e
#define AFE440X_ALED2CONVST 0x0f
#define AFE440X_ALED2CONVEND 0x10
#define AFE440X_LED1CONVST 0x11
#define AFE440X_LED1CONVEND 0x12
#define AFE440X_ALED1CONVST 0x13
#define AFE440X_ALED1CONVEND 0x14
#define AFE440X_ADCRSTSTCT0 0x15
#define AFE440X_ADCRSTENDCT0 0x16
#define AFE440X_ADCRSTSTCT1 0x17
#define AFE440X_ADCRSTENDCT1 0x18
#define AFE440X_ADCRSTSTCT2 0x19
#define AFE440X_ADCRSTENDCT2 0x1a
#define AFE440X_ADCRSTSTCT3 0x1b
#define AFE440X_ADCRSTENDCT3 0x1c
#define AFE440X_PRPCOUNT 0x1d
#define AFE440X_CONTROL1 0x1e
#define AFE440X_LEDCNTRL 0x22
#define AFE440X_CONTROL2 0x23
#define AFE440X_ALARM 0x29
#define AFE440X_LED2VAL 0x2a
#define AFE440X_ALED2VAL 0x2b
#define AFE440X_LED1VAL 0x2c
#define AFE440X_ALED1VAL 0x2d
#define AFE440X_LED2_ALED2VAL 0x2e
#define AFE440X_LED1_ALED1VAL 0x2f
#define AFE440X_CONTROL3 0x31
#define AFE440X_PDNCYCLESTC 0x32
#define AFE440X_PDNCYCLEENDC 0x33
/* CONTROL0 register fields */
#define AFE440X_CONTROL0_REG_READ BIT(0)
#define AFE440X_CONTROL0_TM_COUNT_RST BIT(1)
#define AFE440X_CONTROL0_SW_RESET BIT(3)
/* CONTROL1 register fields */
#define AFE440X_CONTROL1_TIMEREN BIT(8)
/* TIAGAIN register fields */
#define AFE440X_TIAGAIN_ENSEPGAIN_MASK BIT(15)
#define AFE440X_TIAGAIN_ENSEPGAIN_SHIFT 15
/* CONTROL2 register fields */
#define AFE440X_CONTROL2_PDN_AFE BIT(0)
#define AFE440X_CONTROL2_PDN_RX BIT(1)
#define AFE440X_CONTROL2_DYNAMIC4 BIT(3)
#define AFE440X_CONTROL2_DYNAMIC3 BIT(4)
#define AFE440X_CONTROL2_DYNAMIC2 BIT(14)
#define AFE440X_CONTROL2_DYNAMIC1 BIT(20)
/* CONTROL3 register fields */
#define AFE440X_CONTROL3_CLKDIV GENMASK(2, 0)
/* CONTROL0 values */
#define AFE440X_CONTROL0_WRITE 0x0
#define AFE440X_CONTROL0_READ 0x1
struct afe440x_reg_info {
unsigned int reg;
unsigned int offreg;
unsigned int shift;
unsigned int mask;
};
#define AFE440X_REG_INFO(_reg, _offreg, _sm) \
{ \
.reg = _reg, \
.offreg = _offreg, \
.shift = _sm ## _SHIFT, \
.mask = _sm ## _MASK, \
}
#define AFE440X_INTENSITY_CHAN(_index, _name, _mask) \
{ \
.type = IIO_INTENSITY, \
.channel = _index, \
.address = _index, \
.scan_index = _index, \
.scan_type = { \
.sign = 's', \
.realbits = 24, \
.storagebits = 32, \
.endianness = IIO_CPU, \
}, \
.extend_name = _name, \
.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \
_mask, \
}
#define AFE440X_CURRENT_CHAN(_index, _name) \
{ \
.type = IIO_CURRENT, \
.channel = _index, \
.address = _index, \
.scan_index = _index, \
.extend_name = _name, \
.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \
BIT(IIO_CHAN_INFO_SCALE), \
.output = true, \
}
enum afe440x_reg_type {
SIMPLE,
RESISTANCE,
CAPACITANCE,
};
struct afe440x_val_table {
int integer;
int fract;
};
#define AFE440X_TABLE_ATTR(_name, _table) \
static ssize_t _name ## _show(struct device *dev, \
struct device_attribute *attr, char *buf) \
{ \
ssize_t len = 0; \
int i; \
\
for (i = 0; i < ARRAY_SIZE(_table); i++) \
len += scnprintf(buf + len, PAGE_SIZE - len, "%d.%06u ", \
_table[i].integer, \
_table[i].fract); \
\
buf[len - 1] = '\n'; \
\
return len; \
} \
static DEVICE_ATTR_RO(_name)
struct afe440x_attr {
struct device_attribute dev_attr;
unsigned int reg;
unsigned int shift;
unsigned int mask;
enum afe440x_reg_type type;
const struct afe440x_val_table *val_table;
unsigned int table_size;
};
#define to_afe440x_attr(_dev_attr) \
container_of(_dev_attr, struct afe440x_attr, dev_attr)
#define AFE440X_ATTR(_name, _reg, _field, _type, _table, _size) \
struct afe440x_attr afe440x_attr_##_name = { \
.dev_attr = __ATTR(_name, (S_IRUGO | S_IWUSR), \
afe440x_show_register, \
afe440x_store_register), \
.reg = _reg, \
.shift = _field ## _SHIFT, \
.mask = _field ## _MASK, \
.type = _type, \
.val_table = _table, \
.table_size = _size, \
}
#endif /* _AFE440X_H */
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