2016-10-08 20:34:25 +08:00
|
|
|
/**
|
|
|
|
* IIO driver for the MiraMEMS DA311 3-axis accelerometer
|
|
|
|
*
|
|
|
|
* Copyright (c) 2016 Hans de Goede <hdegoede@redhat.com>
|
|
|
|
* Copyright (c) 2011-2013 MiraMEMS Sensing Technology Co., Ltd.
|
|
|
|
*
|
|
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
|
|
* under the terms and conditions of the GNU General Public License,
|
|
|
|
* version 2, as published by the Free Software Foundation.
|
|
|
|
*/
|
|
|
|
|
|
|
|
#include <linux/module.h>
|
|
|
|
#include <linux/i2c.h>
|
|
|
|
#include <linux/iio/iio.h>
|
|
|
|
#include <linux/iio/sysfs.h>
|
|
|
|
#include <linux/byteorder/generic.h>
|
|
|
|
|
|
|
|
#define DA311_CHIP_ID 0x13
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Note register addressed go from 0 - 0x3f and then wrap.
|
|
|
|
* For some reason there are 2 banks with 0 - 0x3f addresses,
|
|
|
|
* rather then a single 0-0x7f bank.
|
|
|
|
*/
|
|
|
|
|
|
|
|
/* Bank 0 regs */
|
|
|
|
#define DA311_REG_BANK 0x0000
|
|
|
|
#define DA311_REG_LDO_REG 0x0006
|
|
|
|
#define DA311_REG_CHIP_ID 0x000f
|
|
|
|
#define DA311_REG_TEMP_CFG_REG 0x001f
|
|
|
|
#define DA311_REG_CTRL_REG1 0x0020
|
|
|
|
#define DA311_REG_CTRL_REG3 0x0022
|
|
|
|
#define DA311_REG_CTRL_REG4 0x0023
|
|
|
|
#define DA311_REG_CTRL_REG5 0x0024
|
|
|
|
#define DA311_REG_CTRL_REG6 0x0025
|
|
|
|
#define DA311_REG_STATUS_REG 0x0027
|
|
|
|
#define DA311_REG_OUT_X_L 0x0028
|
|
|
|
#define DA311_REG_OUT_X_H 0x0029
|
|
|
|
#define DA311_REG_OUT_Y_L 0x002a
|
|
|
|
#define DA311_REG_OUT_Y_H 0x002b
|
|
|
|
#define DA311_REG_OUT_Z_L 0x002c
|
|
|
|
#define DA311_REG_OUT_Z_H 0x002d
|
|
|
|
#define DA311_REG_INT1_CFG 0x0030
|
|
|
|
#define DA311_REG_INT1_SRC 0x0031
|
|
|
|
#define DA311_REG_INT1_THS 0x0032
|
|
|
|
#define DA311_REG_INT1_DURATION 0x0033
|
|
|
|
#define DA311_REG_INT2_CFG 0x0034
|
|
|
|
#define DA311_REG_INT2_SRC 0x0035
|
|
|
|
#define DA311_REG_INT2_THS 0x0036
|
|
|
|
#define DA311_REG_INT2_DURATION 0x0037
|
|
|
|
#define DA311_REG_CLICK_CFG 0x0038
|
|
|
|
#define DA311_REG_CLICK_SRC 0x0039
|
|
|
|
#define DA311_REG_CLICK_THS 0x003a
|
|
|
|
#define DA311_REG_TIME_LIMIT 0x003b
|
|
|
|
#define DA311_REG_TIME_LATENCY 0x003c
|
|
|
|
#define DA311_REG_TIME_WINDOW 0x003d
|
|
|
|
|
|
|
|
/* Bank 1 regs */
|
|
|
|
#define DA311_REG_SOFT_RESET 0x0105
|
|
|
|
#define DA311_REG_OTP_XOFF_L 0x0110
|
|
|
|
#define DA311_REG_OTP_XOFF_H 0x0111
|
|
|
|
#define DA311_REG_OTP_YOFF_L 0x0112
|
|
|
|
#define DA311_REG_OTP_YOFF_H 0x0113
|
|
|
|
#define DA311_REG_OTP_ZOFF_L 0x0114
|
|
|
|
#define DA311_REG_OTP_ZOFF_H 0x0115
|
|
|
|
#define DA311_REG_OTP_XSO 0x0116
|
|
|
|
#define DA311_REG_OTP_YSO 0x0117
|
|
|
|
#define DA311_REG_OTP_ZSO 0x0118
|
|
|
|
#define DA311_REG_OTP_TRIM_OSC 0x011b
|
|
|
|
#define DA311_REG_LPF_ABSOLUTE 0x011c
|
|
|
|
#define DA311_REG_TEMP_OFF1 0x0127
|
|
|
|
#define DA311_REG_TEMP_OFF2 0x0128
|
|
|
|
#define DA311_REG_TEMP_OFF3 0x0129
|
|
|
|
#define DA311_REG_OTP_TRIM_THERM_H 0x011a
|
|
|
|
|
|
|
|
/*
|
|
|
|
* a value of + or -1024 corresponds to + or - 1G
|
|
|
|
* scale = 9.81 / 1024 = 0.009580078
|
|
|
|
*/
|
|
|
|
|
|
|
|
static const int da311_nscale = 9580078;
|
|
|
|
|
|
|
|
#define DA311_CHANNEL(reg, axis) { \
|
|
|
|
.type = IIO_ACCEL, \
|
|
|
|
.address = reg, \
|
|
|
|
.modified = 1, \
|
|
|
|
.channel2 = IIO_MOD_##axis, \
|
|
|
|
.info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
|
|
|
|
.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), \
|
|
|
|
}
|
|
|
|
|
|
|
|
static const struct iio_chan_spec da311_channels[] = {
|
|
|
|
/* | 0x80 comes from the android driver */
|
|
|
|
DA311_CHANNEL(DA311_REG_OUT_X_L | 0x80, X),
|
|
|
|
DA311_CHANNEL(DA311_REG_OUT_Y_L | 0x80, Y),
|
|
|
|
DA311_CHANNEL(DA311_REG_OUT_Z_L | 0x80, Z),
|
|
|
|
};
|
|
|
|
|
|
|
|
struct da311_data {
|
|
|
|
struct i2c_client *client;
|
|
|
|
};
|
|
|
|
|
|
|
|
static int da311_register_mask_write(struct i2c_client *client, u16 addr,
|
|
|
|
u8 mask, u8 data)
|
|
|
|
{
|
|
|
|
int ret;
|
|
|
|
u8 tmp_data = 0;
|
|
|
|
|
|
|
|
if (addr & 0xff00) {
|
|
|
|
/* Select bank 1 */
|
|
|
|
ret = i2c_smbus_write_byte_data(client, DA311_REG_BANK, 0x01);
|
|
|
|
if (ret < 0)
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (mask != 0xff) {
|
|
|
|
ret = i2c_smbus_read_byte_data(client, addr);
|
|
|
|
if (ret < 0)
|
|
|
|
return ret;
|
|
|
|
tmp_data = ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
tmp_data &= ~mask;
|
|
|
|
tmp_data |= data & mask;
|
|
|
|
ret = i2c_smbus_write_byte_data(client, addr & 0xff, tmp_data);
|
|
|
|
if (ret < 0)
|
|
|
|
return ret;
|
|
|
|
|
|
|
|
if (addr & 0xff00) {
|
|
|
|
/* Back to bank 0 */
|
|
|
|
ret = i2c_smbus_write_byte_data(client, DA311_REG_BANK, 0x00);
|
|
|
|
if (ret < 0)
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Init sequence taken from the android driver */
|
|
|
|
static int da311_reset(struct i2c_client *client)
|
|
|
|
{
|
2017-07-07 23:55:19 +08:00
|
|
|
static const struct {
|
2016-10-08 20:34:25 +08:00
|
|
|
u16 addr;
|
|
|
|
u8 mask;
|
|
|
|
u8 data;
|
|
|
|
} init_data[] = {
|
|
|
|
{ DA311_REG_TEMP_CFG_REG, 0xff, 0x08 },
|
|
|
|
{ DA311_REG_CTRL_REG5, 0xff, 0x80 },
|
|
|
|
{ DA311_REG_CTRL_REG4, 0x30, 0x00 },
|
|
|
|
{ DA311_REG_CTRL_REG1, 0xff, 0x6f },
|
|
|
|
{ DA311_REG_TEMP_CFG_REG, 0xff, 0x88 },
|
|
|
|
{ DA311_REG_LDO_REG, 0xff, 0x02 },
|
|
|
|
{ DA311_REG_OTP_TRIM_OSC, 0xff, 0x27 },
|
|
|
|
{ DA311_REG_LPF_ABSOLUTE, 0xff, 0x30 },
|
|
|
|
{ DA311_REG_TEMP_OFF1, 0xff, 0x3f },
|
|
|
|
{ DA311_REG_TEMP_OFF2, 0xff, 0xff },
|
|
|
|
{ DA311_REG_TEMP_OFF3, 0xff, 0x0f },
|
|
|
|
};
|
|
|
|
int i, ret;
|
|
|
|
|
|
|
|
/* Reset */
|
|
|
|
ret = da311_register_mask_write(client, DA311_REG_SOFT_RESET,
|
|
|
|
0xff, 0xaa);
|
|
|
|
if (ret < 0)
|
|
|
|
return ret;
|
|
|
|
|
|
|
|
for (i = 0; i < ARRAY_SIZE(init_data); i++) {
|
|
|
|
ret = da311_register_mask_write(client,
|
|
|
|
init_data[i].addr,
|
|
|
|
init_data[i].mask,
|
|
|
|
init_data[i].data);
|
|
|
|
if (ret < 0)
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int da311_enable(struct i2c_client *client, bool enable)
|
|
|
|
{
|
|
|
|
u8 data = enable ? 0x00 : 0x20;
|
|
|
|
|
|
|
|
return da311_register_mask_write(client, DA311_REG_TEMP_CFG_REG,
|
|
|
|
0x20, data);
|
|
|
|
}
|
|
|
|
|
|
|
|
static int da311_read_raw(struct iio_dev *indio_dev,
|
|
|
|
struct iio_chan_spec const *chan,
|
|
|
|
int *val, int *val2, long mask)
|
|
|
|
{
|
|
|
|
struct da311_data *data = iio_priv(indio_dev);
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
switch (mask) {
|
|
|
|
case IIO_CHAN_INFO_RAW:
|
|
|
|
ret = i2c_smbus_read_word_data(data->client, chan->address);
|
|
|
|
if (ret < 0)
|
|
|
|
return ret;
|
|
|
|
/*
|
|
|
|
* Values are 12 bits, stored as 16 bits with the 4
|
|
|
|
* least significant bits always 0.
|
|
|
|
*/
|
|
|
|
*val = (short)ret >> 4;
|
|
|
|
return IIO_VAL_INT;
|
|
|
|
case IIO_CHAN_INFO_SCALE:
|
|
|
|
*val = 0;
|
|
|
|
*val2 = da311_nscale;
|
|
|
|
return IIO_VAL_INT_PLUS_NANO;
|
|
|
|
default:
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static const struct iio_info da311_info = {
|
|
|
|
.read_raw = da311_read_raw,
|
|
|
|
};
|
|
|
|
|
|
|
|
static int da311_probe(struct i2c_client *client,
|
|
|
|
const struct i2c_device_id *id)
|
|
|
|
{
|
|
|
|
int ret;
|
|
|
|
struct iio_dev *indio_dev;
|
|
|
|
struct da311_data *data;
|
|
|
|
|
|
|
|
ret = i2c_smbus_read_byte_data(client, DA311_REG_CHIP_ID);
|
|
|
|
if (ret != DA311_CHIP_ID)
|
|
|
|
return (ret < 0) ? ret : -ENODEV;
|
|
|
|
|
|
|
|
indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
|
|
|
|
if (!indio_dev)
|
|
|
|
return -ENOMEM;
|
|
|
|
|
|
|
|
data = iio_priv(indio_dev);
|
|
|
|
data->client = client;
|
|
|
|
i2c_set_clientdata(client, indio_dev);
|
|
|
|
|
|
|
|
indio_dev->dev.parent = &client->dev;
|
|
|
|
indio_dev->info = &da311_info;
|
|
|
|
indio_dev->name = "da311";
|
|
|
|
indio_dev->modes = INDIO_DIRECT_MODE;
|
|
|
|
indio_dev->channels = da311_channels;
|
|
|
|
indio_dev->num_channels = ARRAY_SIZE(da311_channels);
|
|
|
|
|
|
|
|
ret = da311_reset(client);
|
|
|
|
if (ret < 0)
|
|
|
|
return ret;
|
|
|
|
|
|
|
|
ret = da311_enable(client, true);
|
|
|
|
if (ret < 0)
|
|
|
|
return ret;
|
|
|
|
|
|
|
|
ret = iio_device_register(indio_dev);
|
|
|
|
if (ret < 0) {
|
|
|
|
dev_err(&client->dev, "device_register failed\n");
|
|
|
|
da311_enable(client, false);
|
|
|
|
}
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int da311_remove(struct i2c_client *client)
|
|
|
|
{
|
|
|
|
struct iio_dev *indio_dev = i2c_get_clientdata(client);
|
|
|
|
|
|
|
|
iio_device_unregister(indio_dev);
|
|
|
|
|
|
|
|
return da311_enable(client, false);
|
|
|
|
}
|
|
|
|
|
|
|
|
#ifdef CONFIG_PM_SLEEP
|
|
|
|
static int da311_suspend(struct device *dev)
|
|
|
|
{
|
|
|
|
return da311_enable(to_i2c_client(dev), false);
|
|
|
|
}
|
|
|
|
|
|
|
|
static int da311_resume(struct device *dev)
|
|
|
|
{
|
|
|
|
return da311_enable(to_i2c_client(dev), true);
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
|
|
static SIMPLE_DEV_PM_OPS(da311_pm_ops, da311_suspend, da311_resume);
|
|
|
|
|
|
|
|
static const struct i2c_device_id da311_i2c_id[] = {
|
|
|
|
{"da311", 0},
|
|
|
|
{}
|
|
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(i2c, da311_i2c_id);
|
|
|
|
|
|
|
|
static struct i2c_driver da311_driver = {
|
|
|
|
.driver = {
|
|
|
|
.name = "da311",
|
|
|
|
.pm = &da311_pm_ops,
|
|
|
|
},
|
|
|
|
.probe = da311_probe,
|
|
|
|
.remove = da311_remove,
|
|
|
|
.id_table = da311_i2c_id,
|
|
|
|
};
|
|
|
|
|
|
|
|
module_i2c_driver(da311_driver);
|
|
|
|
|
|
|
|
MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
|
|
|
|
MODULE_DESCRIPTION("MiraMEMS DA311 3-Axis Accelerometer driver");
|
|
|
|
MODULE_LICENSE("GPL v2");
|