551 lines
12 KiB
C
Executable File
551 lines
12 KiB
C
Executable File
/*
|
|
* ADE7759 Active Energy Metering IC with di/dt Sensor Interface Driver
|
|
*
|
|
* Copyright 2010 Analog Devices Inc.
|
|
*
|
|
* Licensed under the GPL-2 or later.
|
|
*/
|
|
|
|
#include <linux/interrupt.h>
|
|
#include <linux/irq.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/mutex.h>
|
|
#include <linux/device.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/spi/spi.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/sysfs.h>
|
|
#include <linux/list.h>
|
|
#include <linux/module.h>
|
|
|
|
#include <linux/iio/iio.h>
|
|
#include <linux/iio/sysfs.h>
|
|
#include "meter.h"
|
|
|
|
#define ADE7759_WAVEFORM 0x01
|
|
#define ADE7759_AENERGY 0x02
|
|
#define ADE7759_RSTENERGY 0x03
|
|
#define ADE7759_STATUS 0x04
|
|
#define ADE7759_RSTSTATUS 0x05
|
|
#define ADE7759_MODE 0x06
|
|
#define ADE7759_CFDEN 0x07
|
|
#define ADE7759_CH1OS 0x08
|
|
#define ADE7759_CH2OS 0x09
|
|
#define ADE7759_GAIN 0x0A
|
|
#define ADE7759_APGAIN 0x0B
|
|
#define ADE7759_PHCAL 0x0C
|
|
#define ADE7759_APOS 0x0D
|
|
#define ADE7759_ZXTOUT 0x0E
|
|
#define ADE7759_SAGCYC 0x0F
|
|
#define ADE7759_IRQEN 0x10
|
|
#define ADE7759_SAGLVL 0x11
|
|
#define ADE7759_TEMP 0x12
|
|
#define ADE7759_LINECYC 0x13
|
|
#define ADE7759_LENERGY 0x14
|
|
#define ADE7759_CFNUM 0x15
|
|
#define ADE7759_CHKSUM 0x1E
|
|
#define ADE7759_DIEREV 0x1F
|
|
|
|
#define ADE7759_READ_REG(a) a
|
|
#define ADE7759_WRITE_REG(a) ((a) | 0x80)
|
|
|
|
#define ADE7759_MAX_TX 6
|
|
#define ADE7759_MAX_RX 6
|
|
#define ADE7759_STARTUP_DELAY 1000
|
|
|
|
#define ADE7759_SPI_SLOW (u32)(300 * 1000)
|
|
#define ADE7759_SPI_BURST (u32)(1000 * 1000)
|
|
#define ADE7759_SPI_FAST (u32)(2000 * 1000)
|
|
|
|
/**
|
|
* struct ade7759_state - device instance specific data
|
|
* @us: actual spi_device
|
|
* @buf_lock: mutex to protect tx and rx
|
|
* @tx: transmit buffer
|
|
* @rx: receive buffer
|
|
**/
|
|
struct ade7759_state {
|
|
struct spi_device *us;
|
|
struct mutex buf_lock;
|
|
u8 tx[ADE7759_MAX_TX] ____cacheline_aligned;
|
|
u8 rx[ADE7759_MAX_RX];
|
|
};
|
|
|
|
static int ade7759_spi_write_reg_8(struct device *dev,
|
|
u8 reg_address,
|
|
u8 val)
|
|
{
|
|
int ret;
|
|
struct iio_dev *indio_dev = dev_to_iio_dev(dev);
|
|
struct ade7759_state *st = iio_priv(indio_dev);
|
|
|
|
mutex_lock(&st->buf_lock);
|
|
st->tx[0] = ADE7759_WRITE_REG(reg_address);
|
|
st->tx[1] = val;
|
|
|
|
ret = spi_write(st->us, st->tx, 2);
|
|
mutex_unlock(&st->buf_lock);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int ade7759_spi_write_reg_16(struct device *dev,
|
|
u8 reg_address,
|
|
u16 value)
|
|
{
|
|
int ret;
|
|
struct iio_dev *indio_dev = dev_to_iio_dev(dev);
|
|
struct ade7759_state *st = iio_priv(indio_dev);
|
|
|
|
mutex_lock(&st->buf_lock);
|
|
st->tx[0] = ADE7759_WRITE_REG(reg_address);
|
|
st->tx[1] = (value >> 8) & 0xFF;
|
|
st->tx[2] = value & 0xFF;
|
|
ret = spi_write(st->us, st->tx, 3);
|
|
mutex_unlock(&st->buf_lock);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int ade7759_spi_read_reg_8(struct device *dev,
|
|
u8 reg_address,
|
|
u8 *val)
|
|
{
|
|
struct iio_dev *indio_dev = dev_to_iio_dev(dev);
|
|
struct ade7759_state *st = iio_priv(indio_dev);
|
|
int ret;
|
|
|
|
ret = spi_w8r8(st->us, ADE7759_READ_REG(reg_address));
|
|
if (ret < 0) {
|
|
dev_err(&st->us->dev, "problem when reading 8 bit register 0x%02X",
|
|
reg_address);
|
|
return ret;
|
|
}
|
|
*val = ret;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ade7759_spi_read_reg_16(struct device *dev,
|
|
u8 reg_address,
|
|
u16 *val)
|
|
{
|
|
struct iio_dev *indio_dev = dev_to_iio_dev(dev);
|
|
struct ade7759_state *st = iio_priv(indio_dev);
|
|
int ret;
|
|
|
|
ret = spi_w8r16be(st->us, ADE7759_READ_REG(reg_address));
|
|
if (ret < 0) {
|
|
dev_err(&st->us->dev, "problem when reading 16 bit register 0x%02X",
|
|
reg_address);
|
|
return ret;
|
|
}
|
|
|
|
*val = ret;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ade7759_spi_read_reg_40(struct device *dev,
|
|
u8 reg_address,
|
|
u64 *val)
|
|
{
|
|
struct iio_dev *indio_dev = dev_to_iio_dev(dev);
|
|
struct ade7759_state *st = iio_priv(indio_dev);
|
|
int ret;
|
|
struct spi_transfer xfers[] = {
|
|
{
|
|
.tx_buf = st->tx,
|
|
.rx_buf = st->rx,
|
|
.bits_per_word = 8,
|
|
.len = 6,
|
|
},
|
|
};
|
|
|
|
mutex_lock(&st->buf_lock);
|
|
st->tx[0] = ADE7759_READ_REG(reg_address);
|
|
memset(&st->tx[1], 0, 5);
|
|
|
|
ret = spi_sync_transfer(st->us, xfers, ARRAY_SIZE(xfers));
|
|
if (ret) {
|
|
dev_err(&st->us->dev, "problem when reading 40 bit register 0x%02X",
|
|
reg_address);
|
|
goto error_ret;
|
|
}
|
|
*val = ((u64)st->rx[1] << 32) | ((u64)st->rx[2] << 24) |
|
|
(st->rx[3] << 16) | (st->rx[4] << 8) | st->rx[5];
|
|
|
|
error_ret:
|
|
mutex_unlock(&st->buf_lock);
|
|
return ret;
|
|
}
|
|
|
|
static ssize_t ade7759_read_8bit(struct device *dev,
|
|
struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
int ret;
|
|
u8 val = 0;
|
|
struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
|
|
|
|
ret = ade7759_spi_read_reg_8(dev, this_attr->address, &val);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return sprintf(buf, "%u\n", val);
|
|
}
|
|
|
|
static ssize_t ade7759_read_16bit(struct device *dev,
|
|
struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
int ret;
|
|
u16 val = 0;
|
|
struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
|
|
|
|
ret = ade7759_spi_read_reg_16(dev, this_attr->address, &val);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return sprintf(buf, "%u\n", val);
|
|
}
|
|
|
|
static ssize_t ade7759_read_40bit(struct device *dev,
|
|
struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
int ret;
|
|
u64 val = 0;
|
|
struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
|
|
|
|
ret = ade7759_spi_read_reg_40(dev, this_attr->address, &val);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return sprintf(buf, "%llu\n", val);
|
|
}
|
|
|
|
static ssize_t ade7759_write_8bit(struct device *dev,
|
|
struct device_attribute *attr,
|
|
const char *buf,
|
|
size_t len)
|
|
{
|
|
struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
|
|
int ret;
|
|
u8 val;
|
|
|
|
ret = kstrtou8(buf, 10, &val);
|
|
if (ret)
|
|
goto error_ret;
|
|
ret = ade7759_spi_write_reg_8(dev, this_attr->address, val);
|
|
|
|
error_ret:
|
|
return ret ? ret : len;
|
|
}
|
|
|
|
static ssize_t ade7759_write_16bit(struct device *dev,
|
|
struct device_attribute *attr,
|
|
const char *buf,
|
|
size_t len)
|
|
{
|
|
struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
|
|
int ret;
|
|
u16 val;
|
|
|
|
ret = kstrtou16(buf, 10, &val);
|
|
if (ret)
|
|
goto error_ret;
|
|
ret = ade7759_spi_write_reg_16(dev, this_attr->address, val);
|
|
|
|
error_ret:
|
|
return ret ? ret : len;
|
|
}
|
|
|
|
static int ade7759_reset(struct device *dev)
|
|
{
|
|
int ret;
|
|
u16 val;
|
|
|
|
ret = ade7759_spi_read_reg_16(dev,
|
|
ADE7759_MODE,
|
|
&val);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
val |= BIT(6); /* Software Chip Reset */
|
|
return ade7759_spi_write_reg_16(dev,
|
|
ADE7759_MODE,
|
|
val);
|
|
}
|
|
|
|
static IIO_DEV_ATTR_AENERGY(ade7759_read_40bit, ADE7759_AENERGY);
|
|
static IIO_DEV_ATTR_CFDEN(0644,
|
|
ade7759_read_16bit,
|
|
ade7759_write_16bit,
|
|
ADE7759_CFDEN);
|
|
static IIO_DEV_ATTR_CFNUM(0644,
|
|
ade7759_read_8bit,
|
|
ade7759_write_8bit,
|
|
ADE7759_CFNUM);
|
|
static IIO_DEV_ATTR_CHKSUM(ade7759_read_8bit, ADE7759_CHKSUM);
|
|
static IIO_DEV_ATTR_PHCAL(0644,
|
|
ade7759_read_16bit,
|
|
ade7759_write_16bit,
|
|
ADE7759_PHCAL);
|
|
static IIO_DEV_ATTR_APOS(0644,
|
|
ade7759_read_16bit,
|
|
ade7759_write_16bit,
|
|
ADE7759_APOS);
|
|
static IIO_DEV_ATTR_SAGCYC(0644,
|
|
ade7759_read_8bit,
|
|
ade7759_write_8bit,
|
|
ADE7759_SAGCYC);
|
|
static IIO_DEV_ATTR_SAGLVL(0644,
|
|
ade7759_read_8bit,
|
|
ade7759_write_8bit,
|
|
ADE7759_SAGLVL);
|
|
static IIO_DEV_ATTR_LINECYC(0644,
|
|
ade7759_read_8bit,
|
|
ade7759_write_8bit,
|
|
ADE7759_LINECYC);
|
|
static IIO_DEV_ATTR_LENERGY(ade7759_read_40bit, ADE7759_LENERGY);
|
|
static IIO_DEV_ATTR_PGA_GAIN(0644,
|
|
ade7759_read_8bit,
|
|
ade7759_write_8bit,
|
|
ADE7759_GAIN);
|
|
static IIO_DEV_ATTR_ACTIVE_POWER_GAIN(0644,
|
|
ade7759_read_16bit,
|
|
ade7759_write_16bit,
|
|
ADE7759_APGAIN);
|
|
static IIO_DEV_ATTR_CH_OFF(1, 0644,
|
|
ade7759_read_8bit,
|
|
ade7759_write_8bit,
|
|
ADE7759_CH1OS);
|
|
static IIO_DEV_ATTR_CH_OFF(2, 0644,
|
|
ade7759_read_8bit,
|
|
ade7759_write_8bit,
|
|
ADE7759_CH2OS);
|
|
|
|
static int ade7759_set_irq(struct device *dev, bool enable)
|
|
{
|
|
int ret;
|
|
u8 irqen;
|
|
|
|
ret = ade7759_spi_read_reg_8(dev, ADE7759_IRQEN, &irqen);
|
|
if (ret)
|
|
goto error_ret;
|
|
|
|
if (enable)
|
|
irqen |= BIT(3); /* Enables an interrupt when a data is
|
|
* present in the waveform register
|
|
*/
|
|
else
|
|
irqen &= ~BIT(3);
|
|
|
|
ret = ade7759_spi_write_reg_8(dev, ADE7759_IRQEN, irqen);
|
|
|
|
error_ret:
|
|
return ret;
|
|
}
|
|
|
|
/* Power down the device */
|
|
static int ade7759_stop_device(struct device *dev)
|
|
{
|
|
int ret;
|
|
u16 val;
|
|
|
|
ret = ade7759_spi_read_reg_16(dev,
|
|
ADE7759_MODE,
|
|
&val);
|
|
if (ret < 0) {
|
|
dev_err(dev, "unable to power down the device, error: %d\n",
|
|
ret);
|
|
return ret;
|
|
}
|
|
|
|
val |= BIT(4); /* AD converters can be turned off */
|
|
|
|
return ade7759_spi_write_reg_16(dev, ADE7759_MODE, val);
|
|
}
|
|
|
|
static int ade7759_initial_setup(struct iio_dev *indio_dev)
|
|
{
|
|
int ret;
|
|
struct ade7759_state *st = iio_priv(indio_dev);
|
|
struct device *dev = &indio_dev->dev;
|
|
|
|
/* use low spi speed for init */
|
|
st->us->mode = SPI_MODE_3;
|
|
spi_setup(st->us);
|
|
|
|
/* Disable IRQ */
|
|
ret = ade7759_set_irq(dev, false);
|
|
if (ret) {
|
|
dev_err(dev, "disable irq failed");
|
|
goto err_ret;
|
|
}
|
|
|
|
ade7759_reset(dev);
|
|
usleep_range(ADE7759_STARTUP_DELAY, ADE7759_STARTUP_DELAY + 100);
|
|
|
|
err_ret:
|
|
return ret;
|
|
}
|
|
|
|
static ssize_t ade7759_read_frequency(struct device *dev,
|
|
struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
int ret;
|
|
u16 t;
|
|
int sps;
|
|
|
|
ret = ade7759_spi_read_reg_16(dev,
|
|
ADE7759_MODE,
|
|
&t);
|
|
if (ret)
|
|
return ret;
|
|
|
|
t = (t >> 3) & 0x3;
|
|
sps = 27900 / (1 + t);
|
|
|
|
return sprintf(buf, "%d\n", sps);
|
|
}
|
|
|
|
static ssize_t ade7759_write_frequency(struct device *dev,
|
|
struct device_attribute *attr,
|
|
const char *buf,
|
|
size_t len)
|
|
{
|
|
struct iio_dev *indio_dev = dev_to_iio_dev(dev);
|
|
struct ade7759_state *st = iio_priv(indio_dev);
|
|
u16 val;
|
|
int ret;
|
|
u16 reg, t;
|
|
|
|
ret = kstrtou16(buf, 10, &val);
|
|
if (ret)
|
|
return ret;
|
|
if (!val)
|
|
return -EINVAL;
|
|
|
|
mutex_lock(&indio_dev->mlock);
|
|
|
|
t = 27900 / val;
|
|
if (t > 0)
|
|
t--;
|
|
|
|
if (t > 1)
|
|
st->us->max_speed_hz = ADE7759_SPI_SLOW;
|
|
else
|
|
st->us->max_speed_hz = ADE7759_SPI_FAST;
|
|
|
|
ret = ade7759_spi_read_reg_16(dev, ADE7759_MODE, ®);
|
|
if (ret)
|
|
goto out;
|
|
|
|
reg &= ~(3 << 13);
|
|
reg |= t << 13;
|
|
|
|
ret = ade7759_spi_write_reg_16(dev, ADE7759_MODE, reg);
|
|
|
|
out:
|
|
mutex_unlock(&indio_dev->mlock);
|
|
|
|
return ret ? ret : len;
|
|
}
|
|
static IIO_DEV_ATTR_TEMP_RAW(ade7759_read_8bit);
|
|
static IIO_CONST_ATTR(in_temp_offset, "70 C");
|
|
static IIO_CONST_ATTR(in_temp_scale, "1 C");
|
|
|
|
static IIO_DEV_ATTR_SAMP_FREQ(0644,
|
|
ade7759_read_frequency,
|
|
ade7759_write_frequency);
|
|
|
|
static IIO_CONST_ATTR_SAMP_FREQ_AVAIL("27900 14000 7000 3500");
|
|
|
|
static struct attribute *ade7759_attributes[] = {
|
|
&iio_dev_attr_in_temp_raw.dev_attr.attr,
|
|
&iio_const_attr_in_temp_offset.dev_attr.attr,
|
|
&iio_const_attr_in_temp_scale.dev_attr.attr,
|
|
&iio_dev_attr_sampling_frequency.dev_attr.attr,
|
|
&iio_const_attr_sampling_frequency_available.dev_attr.attr,
|
|
&iio_dev_attr_phcal.dev_attr.attr,
|
|
&iio_dev_attr_cfden.dev_attr.attr,
|
|
&iio_dev_attr_aenergy.dev_attr.attr,
|
|
&iio_dev_attr_cfnum.dev_attr.attr,
|
|
&iio_dev_attr_apos.dev_attr.attr,
|
|
&iio_dev_attr_sagcyc.dev_attr.attr,
|
|
&iio_dev_attr_saglvl.dev_attr.attr,
|
|
&iio_dev_attr_linecyc.dev_attr.attr,
|
|
&iio_dev_attr_lenergy.dev_attr.attr,
|
|
&iio_dev_attr_chksum.dev_attr.attr,
|
|
&iio_dev_attr_pga_gain.dev_attr.attr,
|
|
&iio_dev_attr_active_power_gain.dev_attr.attr,
|
|
&iio_dev_attr_choff_1.dev_attr.attr,
|
|
&iio_dev_attr_choff_2.dev_attr.attr,
|
|
NULL,
|
|
};
|
|
|
|
static const struct attribute_group ade7759_attribute_group = {
|
|
.attrs = ade7759_attributes,
|
|
};
|
|
|
|
static const struct iio_info ade7759_info = {
|
|
.attrs = &ade7759_attribute_group,
|
|
.driver_module = THIS_MODULE,
|
|
};
|
|
|
|
static int ade7759_probe(struct spi_device *spi)
|
|
{
|
|
int ret;
|
|
struct ade7759_state *st;
|
|
struct iio_dev *indio_dev;
|
|
|
|
/* setup the industrialio driver allocated elements */
|
|
indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st));
|
|
if (!indio_dev)
|
|
return -ENOMEM;
|
|
/* this is only used for removal purposes */
|
|
spi_set_drvdata(spi, indio_dev);
|
|
|
|
st = iio_priv(indio_dev);
|
|
st->us = spi;
|
|
mutex_init(&st->buf_lock);
|
|
indio_dev->name = spi->dev.driver->name;
|
|
indio_dev->dev.parent = &spi->dev;
|
|
indio_dev->info = &ade7759_info;
|
|
indio_dev->modes = INDIO_DIRECT_MODE;
|
|
|
|
/* Get the device into a sane initial state */
|
|
ret = ade7759_initial_setup(indio_dev);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return iio_device_register(indio_dev);
|
|
}
|
|
|
|
static int ade7759_remove(struct spi_device *spi)
|
|
{
|
|
struct iio_dev *indio_dev = spi_get_drvdata(spi);
|
|
|
|
iio_device_unregister(indio_dev);
|
|
ade7759_stop_device(&indio_dev->dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct spi_driver ade7759_driver = {
|
|
.driver = {
|
|
.name = "ade7759",
|
|
},
|
|
.probe = ade7759_probe,
|
|
.remove = ade7759_remove,
|
|
};
|
|
module_spi_driver(ade7759_driver);
|
|
|
|
MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
|
|
MODULE_DESCRIPTION("Analog Devices ADE7759 Active Energy Metering IC Driver");
|
|
MODULE_LICENSE("GPL v2");
|
|
MODULE_ALIAS("spi:ad7759");
|