diff options
Diffstat (limited to 'drivers/staging/iio/meter/ade7759.c')
| -rw-r--r-- | drivers/staging/iio/meter/ade7759.c | 558 |
1 files changed, 0 insertions, 558 deletions
diff --git a/drivers/staging/iio/meter/ade7759.c b/drivers/staging/iio/meter/ade7759.c deleted file mode 100644 index c078b770fa53..000000000000 --- a/drivers/staging/iio/meter/ade7759.c +++ /dev/null @@ -1,558 +0,0 @@ -/* - * 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 and write frequency - * @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; -} - -/*Unlocked version of ade7759_spi_write_reg_16 function */ -static int __ade7759_spi_write_reg_16(struct device *dev, - u8 reg_address, - u16 value) -{ - struct iio_dev *indio_dev = dev_to_iio_dev(dev); - struct ade7759_state *st = iio_priv(indio_dev); - - st->tx[0] = ADE7759_WRITE_REG(reg_address); - st->tx[1] = (value >> 8) & 0xFF; - st->tx[2] = value & 0xFF; - return spi_write(st->us, st->tx, 3); -} - -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); - ret = __ade7759_spi_write_reg_16(dev, reg_address, value); - 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_DEVICE_ATTR(choff_1, 0644, - ade7759_read_8bit, - ade7759_write_8bit, - ADE7759_CH1OS); - -static IIO_DEVICE_ATTR(choff_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(&st->buf_lock); - - 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(&st->buf_lock); - - 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, -}; - -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"); |