+++ /dev/null
-/*
- * ADE7754 Polyphase Multifunction Energy Metering IC Driver
- *
- * Copyright 2010 Analog Devices Inc.
- *
- * Licensed under the GPL-2 or later.
- */
-
-#include <linux/delay.h>
-#include <linux/device.h>
-#include <linux/interrupt.h>
-#include <linux/irq.h>
-#include <linux/kernel.h>
-#include <linux/list.h>
-#include <linux/module.h>
-#include <linux/mutex.h>
-#include <linux/spi/spi.h>
-#include <linux/slab.h>
-#include <linux/sysfs.h>
-#include <linux/iio/iio.h>
-#include <linux/iio/sysfs.h>
-#include "meter.h"
-
-#define ADE7754_AENERGY 0x01
-#define ADE7754_RAENERGY 0x02
-#define ADE7754_LAENERGY 0x03
-#define ADE7754_VAENERGY 0x04
-#define ADE7754_RVAENERGY 0x05
-#define ADE7754_LVAENERGY 0x06
-#define ADE7754_PERIOD 0x07
-#define ADE7754_TEMP 0x08
-#define ADE7754_WFORM 0x09
-#define ADE7754_OPMODE 0x0A
-#define ADE7754_MMODE 0x0B
-#define ADE7754_WAVMODE 0x0C
-#define ADE7754_WATMODE 0x0D
-#define ADE7754_VAMODE 0x0E
-#define ADE7754_IRQEN 0x0F
-#define ADE7754_STATUS 0x10
-#define ADE7754_RSTATUS 0x11
-#define ADE7754_ZXTOUT 0x12
-#define ADE7754_LINCYC 0x13
-#define ADE7754_SAGCYC 0x14
-#define ADE7754_SAGLVL 0x15
-#define ADE7754_VPEAK 0x16
-#define ADE7754_IPEAK 0x17
-#define ADE7754_GAIN 0x18
-#define ADE7754_AWG 0x19
-#define ADE7754_BWG 0x1A
-#define ADE7754_CWG 0x1B
-#define ADE7754_AVAG 0x1C
-#define ADE7754_BVAG 0x1D
-#define ADE7754_CVAG 0x1E
-#define ADE7754_APHCAL 0x1F
-#define ADE7754_BPHCAL 0x20
-#define ADE7754_CPHCAL 0x21
-#define ADE7754_AAPOS 0x22
-#define ADE7754_BAPOS 0x23
-#define ADE7754_CAPOS 0x24
-#define ADE7754_CFNUM 0x25
-#define ADE7754_CFDEN 0x26
-#define ADE7754_WDIV 0x27
-#define ADE7754_VADIV 0x28
-#define ADE7754_AIRMS 0x29
-#define ADE7754_BIRMS 0x2A
-#define ADE7754_CIRMS 0x2B
-#define ADE7754_AVRMS 0x2C
-#define ADE7754_BVRMS 0x2D
-#define ADE7754_CVRMS 0x2E
-#define ADE7754_AIRMSOS 0x2F
-#define ADE7754_BIRMSOS 0x30
-#define ADE7754_CIRMSOS 0x31
-#define ADE7754_AVRMSOS 0x32
-#define ADE7754_BVRMSOS 0x33
-#define ADE7754_CVRMSOS 0x34
-#define ADE7754_AAPGAIN 0x35
-#define ADE7754_BAPGAIN 0x36
-#define ADE7754_CAPGAIN 0x37
-#define ADE7754_AVGAIN 0x38
-#define ADE7754_BVGAIN 0x39
-#define ADE7754_CVGAIN 0x3A
-#define ADE7754_CHKSUM 0x3E
-#define ADE7754_VERSION 0x3F
-
-#define ADE7754_READ_REG(a) a
-#define ADE7754_WRITE_REG(a) ((a) | 0x80)
-
-#define ADE7754_MAX_TX 4
-#define ADE7754_MAX_RX 4
-#define ADE7754_STARTUP_DELAY 1000
-
-#define ADE7754_SPI_SLOW (u32)(300 * 1000)
-#define ADE7754_SPI_BURST (u32)(1000 * 1000)
-#define ADE7754_SPI_FAST (u32)(2000 * 1000)
-
-/**
- * struct ade7754_state - device instance specific data
- * @us: actual spi_device
- * @buf_lock: mutex to protect tx, rx and write frequency
- * @tx: transmit buffer
- * @rx: receive buffer
- **/
-struct ade7754_state {
- struct spi_device *us;
- struct mutex buf_lock;
- u8 tx[ADE7754_MAX_TX] ____cacheline_aligned;
- u8 rx[ADE7754_MAX_RX];
-};
-
-/* Unlocked version of ade7754_spi_write_reg_8 function */
-static int __ade7754_spi_write_reg_8(struct device *dev, u8 reg_address, u8 val)
-{
- struct iio_dev *indio_dev = dev_to_iio_dev(dev);
- struct ade7754_state *st = iio_priv(indio_dev);
-
- st->tx[0] = ADE7754_WRITE_REG(reg_address);
- st->tx[1] = val;
- return spi_write(st->us, st->tx, 2);
-}
-
-static int ade7754_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 ade7754_state *st = iio_priv(indio_dev);
-
- mutex_lock(&st->buf_lock);
- ret = __ade7754_spi_write_reg_8(dev, reg_address, val);
- mutex_unlock(&st->buf_lock);
-
- return ret;
-}
-
-static int ade7754_spi_write_reg_16(struct device *dev,
- u8 reg_address, u16 val)
-{
- int ret;
- struct iio_dev *indio_dev = dev_to_iio_dev(dev);
- struct ade7754_state *st = iio_priv(indio_dev);
-
- mutex_lock(&st->buf_lock);
- st->tx[0] = ADE7754_WRITE_REG(reg_address);
- st->tx[1] = (val >> 8) & 0xFF;
- st->tx[2] = val & 0xFF;
- ret = spi_write(st->us, st->tx, 3);
- mutex_unlock(&st->buf_lock);
-
- return ret;
-}
-
-static int ade7754_spi_read_reg_8(struct device *dev, u8 reg_address, u8 *val)
-{
- struct iio_dev *indio_dev = dev_to_iio_dev(dev);
- struct ade7754_state *st = iio_priv(indio_dev);
- int ret;
-
- ret = spi_w8r8(st->us, ADE7754_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 ade7754_spi_read_reg_16(struct device *dev,
- u8 reg_address, u16 *val)
-{
- struct iio_dev *indio_dev = dev_to_iio_dev(dev);
- struct ade7754_state *st = iio_priv(indio_dev);
- int ret;
-
- ret = spi_w8r16be(st->us, ADE7754_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 ade7754_spi_read_reg_24(struct device *dev,
- u8 reg_address, u32 *val)
-{
- struct iio_dev *indio_dev = dev_to_iio_dev(dev);
- struct ade7754_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 = 4,
- },
- };
-
- mutex_lock(&st->buf_lock);
- st->tx[0] = ADE7754_READ_REG(reg_address);
- st->tx[1] = 0;
- st->tx[2] = 0;
- st->tx[3] = 0;
-
- ret = spi_sync_transfer(st->us, xfers, ARRAY_SIZE(xfers));
- if (ret) {
- dev_err(&st->us->dev, "problem when reading 24 bit register 0x%02X",
- reg_address);
- goto error_ret;
- }
- *val = (st->rx[1] << 16) | (st->rx[2] << 8) | st->rx[3];
-
-error_ret:
- mutex_unlock(&st->buf_lock);
- return ret;
-}
-
-static ssize_t ade7754_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 = ade7754_spi_read_reg_8(dev, this_attr->address, &val);
- if (ret)
- return ret;
-
- return sprintf(buf, "%u\n", val);
-}
-
-static ssize_t ade7754_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 = ade7754_spi_read_reg_16(dev, this_attr->address, &val);
- if (ret)
- return ret;
-
- return sprintf(buf, "%u\n", val);
-}
-
-static ssize_t ade7754_read_24bit(struct device *dev,
- struct device_attribute *attr,
- char *buf)
-{
- int ret;
- u32 val = 0;
- struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
-
- ret = ade7754_spi_read_reg_24(dev, this_attr->address, &val);
- if (ret)
- return ret;
-
- return sprintf(buf, "%u\n", val & 0xFFFFFF);
-}
-
-static ssize_t ade7754_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 = ade7754_spi_write_reg_8(dev, this_attr->address, val);
-
-error_ret:
- return ret ? ret : len;
-}
-
-static ssize_t ade7754_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 = ade7754_spi_write_reg_16(dev, this_attr->address, val);
-
-error_ret:
- return ret ? ret : len;
-}
-
-static int ade7754_reset(struct device *dev)
-{
- int ret;
- u8 val;
-
- ret = ade7754_spi_read_reg_8(dev, ADE7754_OPMODE, &val);
- if (ret < 0)
- return ret;
-
- val |= BIT(6); /* Software Chip Reset */
- return ade7754_spi_write_reg_8(dev, ADE7754_OPMODE, val);
-}
-
-static IIO_DEV_ATTR_AENERGY(ade7754_read_24bit, ADE7754_AENERGY);
-static IIO_DEV_ATTR_LAENERGY(ade7754_read_24bit, ADE7754_LAENERGY);
-static IIO_DEV_ATTR_VAENERGY(ade7754_read_24bit, ADE7754_VAENERGY);
-static IIO_DEV_ATTR_LVAENERGY(ade7754_read_24bit, ADE7754_LVAENERGY);
-static IIO_DEV_ATTR_VPEAK(0644,
- ade7754_read_8bit,
- ade7754_write_8bit,
- ADE7754_VPEAK);
-static IIO_DEV_ATTR_IPEAK(0644,
- ade7754_read_8bit,
- ade7754_write_8bit,
- ADE7754_VPEAK);
-static IIO_DEV_ATTR_APHCAL(0644,
- ade7754_read_8bit,
- ade7754_write_8bit,
- ADE7754_APHCAL);
-static IIO_DEV_ATTR_BPHCAL(0644,
- ade7754_read_8bit,
- ade7754_write_8bit,
- ADE7754_BPHCAL);
-static IIO_DEV_ATTR_CPHCAL(0644,
- ade7754_read_8bit,
- ade7754_write_8bit,
- ADE7754_CPHCAL);
-static IIO_DEV_ATTR_AAPOS(0644,
- ade7754_read_16bit,
- ade7754_write_16bit,
- ADE7754_AAPOS);
-static IIO_DEV_ATTR_BAPOS(0644,
- ade7754_read_16bit,
- ade7754_write_16bit,
- ADE7754_BAPOS);
-static IIO_DEV_ATTR_CAPOS(0644,
- ade7754_read_16bit,
- ade7754_write_16bit,
- ADE7754_CAPOS);
-static IIO_DEV_ATTR_WDIV(0644,
- ade7754_read_8bit,
- ade7754_write_8bit,
- ADE7754_WDIV);
-static IIO_DEV_ATTR_VADIV(0644,
- ade7754_read_8bit,
- ade7754_write_8bit,
- ADE7754_VADIV);
-static IIO_DEV_ATTR_CFNUM(0644,
- ade7754_read_16bit,
- ade7754_write_16bit,
- ADE7754_CFNUM);
-static IIO_DEV_ATTR_CFDEN(0644,
- ade7754_read_16bit,
- ade7754_write_16bit,
- ADE7754_CFDEN);
-static IIO_DEV_ATTR_ACTIVE_POWER_A_GAIN(0644,
- ade7754_read_16bit,
- ade7754_write_16bit,
- ADE7754_AAPGAIN);
-static IIO_DEV_ATTR_ACTIVE_POWER_B_GAIN(0644,
- ade7754_read_16bit,
- ade7754_write_16bit,
- ADE7754_BAPGAIN);
-static IIO_DEV_ATTR_ACTIVE_POWER_C_GAIN(0644,
- ade7754_read_16bit,
- ade7754_write_16bit,
- ADE7754_CAPGAIN);
-static IIO_DEV_ATTR_AIRMS(0444,
- ade7754_read_24bit,
- NULL,
- ADE7754_AIRMS);
-static IIO_DEV_ATTR_BIRMS(0444,
- ade7754_read_24bit,
- NULL,
- ADE7754_BIRMS);
-static IIO_DEV_ATTR_CIRMS(0444,
- ade7754_read_24bit,
- NULL,
- ADE7754_CIRMS);
-static IIO_DEV_ATTR_AVRMS(0444,
- ade7754_read_24bit,
- NULL,
- ADE7754_AVRMS);
-static IIO_DEV_ATTR_BVRMS(0444,
- ade7754_read_24bit,
- NULL,
- ADE7754_BVRMS);
-static IIO_DEV_ATTR_CVRMS(0444,
- ade7754_read_24bit,
- NULL,
- ADE7754_CVRMS);
-static IIO_DEV_ATTR_AIRMSOS(0444,
- ade7754_read_16bit,
- ade7754_write_16bit,
- ADE7754_AIRMSOS);
-static IIO_DEV_ATTR_BIRMSOS(0444,
- ade7754_read_16bit,
- ade7754_write_16bit,
- ADE7754_BIRMSOS);
-static IIO_DEV_ATTR_CIRMSOS(0444,
- ade7754_read_16bit,
- ade7754_write_16bit,
- ADE7754_CIRMSOS);
-static IIO_DEV_ATTR_AVRMSOS(0444,
- ade7754_read_16bit,
- ade7754_write_16bit,
- ADE7754_AVRMSOS);
-static IIO_DEV_ATTR_BVRMSOS(0444,
- ade7754_read_16bit,
- ade7754_write_16bit,
- ADE7754_BVRMSOS);
-static IIO_DEV_ATTR_CVRMSOS(0444,
- ade7754_read_16bit,
- ade7754_write_16bit,
- ADE7754_CVRMSOS);
-
-static int ade7754_set_irq(struct device *dev, bool enable)
-{
- int ret;
- u16 irqen;
-
- ret = ade7754_spi_read_reg_16(dev, ADE7754_IRQEN, &irqen);
- if (ret)
- return ret;
-
- if (enable)
- irqen |= BIT(14); /* Enables an interrupt when a data is
- * present in the waveform register
- */
- else
- irqen &= ~BIT(14);
-
- return ade7754_spi_write_reg_16(dev, ADE7754_IRQEN, irqen);
-}
-
-/* Power down the device */
-static int ade7754_stop_device(struct device *dev)
-{
- int ret;
- u8 val;
-
- ret = ade7754_spi_read_reg_8(dev, ADE7754_OPMODE, &val);
- if (ret < 0) {
- dev_err(dev, "unable to power down the device, error: %d",
- ret);
- return ret;
- }
-
- val |= 7 << 3; /* ADE7754 powered down */
- return ade7754_spi_write_reg_8(dev, ADE7754_OPMODE, val);
-}
-
-static int ade7754_initial_setup(struct iio_dev *indio_dev)
-{
- int ret;
- struct ade7754_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 = ade7754_set_irq(dev, false);
- if (ret) {
- dev_err(dev, "disable irq failed");
- goto err_ret;
- }
-
- ade7754_reset(dev);
- usleep_range(ADE7754_STARTUP_DELAY, ADE7754_STARTUP_DELAY + 100);
-
-err_ret:
- return ret;
-}
-
-static ssize_t ade7754_read_frequency(struct device *dev,
- struct device_attribute *attr,
- char *buf)
-{
- int ret;
- u8 t;
- int sps;
-
- ret = ade7754_spi_read_reg_8(dev, ADE7754_WAVMODE, &t);
- if (ret)
- return ret;
-
- t = (t >> 3) & 0x3;
- sps = 26000 / (1 + t);
-
- return sprintf(buf, "%d\n", sps);
-}
-
-static ssize_t ade7754_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 ade7754_state *st = iio_priv(indio_dev);
- u16 val;
- int ret;
- u8 reg, t;
-
- ret = kstrtou16(buf, 10, &val);
- if (ret)
- return ret;
- if (!val)
- return -EINVAL;
-
- mutex_lock(&st->buf_lock);
-
- t = 26000 / val;
- if (t > 0)
- t--;
-
- if (t > 1)
- st->us->max_speed_hz = ADE7754_SPI_SLOW;
- else
- st->us->max_speed_hz = ADE7754_SPI_FAST;
-
- ret = ade7754_spi_read_reg_8(dev, ADE7754_WAVMODE, ®);
- if (ret)
- goto out;
-
- reg &= ~(3 << 3);
- reg |= t << 3;
-
- ret = __ade7754_spi_write_reg_8(dev, ADE7754_WAVMODE, reg);
-
-out:
- mutex_unlock(&st->buf_lock);
-
- return ret ? ret : len;
-}
-static IIO_DEV_ATTR_TEMP_RAW(ade7754_read_8bit);
-static IIO_CONST_ATTR(in_temp_offset, "129 C");
-static IIO_CONST_ATTR(in_temp_scale, "4 C");
-
-static IIO_DEV_ATTR_SAMP_FREQ(0644,
- ade7754_read_frequency,
- ade7754_write_frequency);
-
-static IIO_CONST_ATTR_SAMP_FREQ_AVAIL("26000 13000 65000 33000");
-
-static struct attribute *ade7754_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_aenergy.dev_attr.attr,
- &iio_dev_attr_laenergy.dev_attr.attr,
- &iio_dev_attr_vaenergy.dev_attr.attr,
- &iio_dev_attr_lvaenergy.dev_attr.attr,
- &iio_dev_attr_vpeak.dev_attr.attr,
- &iio_dev_attr_ipeak.dev_attr.attr,
- &iio_dev_attr_aphcal.dev_attr.attr,
- &iio_dev_attr_bphcal.dev_attr.attr,
- &iio_dev_attr_cphcal.dev_attr.attr,
- &iio_dev_attr_aapos.dev_attr.attr,
- &iio_dev_attr_bapos.dev_attr.attr,
- &iio_dev_attr_capos.dev_attr.attr,
- &iio_dev_attr_wdiv.dev_attr.attr,
- &iio_dev_attr_vadiv.dev_attr.attr,
- &iio_dev_attr_cfnum.dev_attr.attr,
- &iio_dev_attr_cfden.dev_attr.attr,
- &iio_dev_attr_active_power_a_gain.dev_attr.attr,
- &iio_dev_attr_active_power_b_gain.dev_attr.attr,
- &iio_dev_attr_active_power_c_gain.dev_attr.attr,
- &iio_dev_attr_airms.dev_attr.attr,
- &iio_dev_attr_birms.dev_attr.attr,
- &iio_dev_attr_cirms.dev_attr.attr,
- &iio_dev_attr_avrms.dev_attr.attr,
- &iio_dev_attr_bvrms.dev_attr.attr,
- &iio_dev_attr_cvrms.dev_attr.attr,
- &iio_dev_attr_airmsos.dev_attr.attr,
- &iio_dev_attr_birmsos.dev_attr.attr,
- &iio_dev_attr_cirmsos.dev_attr.attr,
- &iio_dev_attr_avrmsos.dev_attr.attr,
- &iio_dev_attr_bvrmsos.dev_attr.attr,
- &iio_dev_attr_cvrmsos.dev_attr.attr,
- NULL,
-};
-
-static const struct attribute_group ade7754_attribute_group = {
- .attrs = ade7754_attributes,
-};
-
-static const struct iio_info ade7754_info = {
- .attrs = &ade7754_attribute_group,
-};
-
-static int ade7754_probe(struct spi_device *spi)
-{
- int ret;
- struct ade7754_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 = &ade7754_info;
- indio_dev->modes = INDIO_DIRECT_MODE;
-
- /* Get the device into a sane initial state */
- ret = ade7754_initial_setup(indio_dev);
- if (ret)
- goto powerdown_on_error;
- ret = iio_device_register(indio_dev);
- if (ret)
- goto powerdown_on_error;
- return ret;
-
-powerdown_on_error:
- ade7754_stop_device(&indio_dev->dev);
- return ret;
-}
-
-static int ade7754_remove(struct spi_device *spi)
-{
- struct iio_dev *indio_dev = spi_get_drvdata(spi);
-
- iio_device_unregister(indio_dev);
- ade7754_stop_device(&indio_dev->dev);
-
- return 0;
-}
-
-static struct spi_driver ade7754_driver = {
- .driver = {
- .name = "ade7754",
- },
- .probe = ade7754_probe,
- .remove = ade7754_remove,
-};
-module_spi_driver(ade7754_driver);
-
-MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
-MODULE_DESCRIPTION("Analog Devices ADE7754 Polyphase Multifunction Energy Metering IC Driver");
-MODULE_LICENSE("GPL v2");
-MODULE_ALIAS("spi:ad7754");
projects / users / hch / xfs.git / commitdiff