diff options
Diffstat (limited to 'drivers/staging/iio/meter/ade7753.c')
| -rw-r--r-- | drivers/staging/iio/meter/ade7753.c | 630 |
1 files changed, 0 insertions, 630 deletions
diff --git a/drivers/staging/iio/meter/ade7753.c b/drivers/staging/iio/meter/ade7753.c deleted file mode 100644 index 275e8dfff836..000000000000 --- a/drivers/staging/iio/meter/ade7753.c +++ /dev/null @@ -1,630 +0,0 @@ -/* - * ADE7753 Single-Phase Multifunction Metering IC with di/dt Sensor Interface - * - * 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/slab.h> -#include <linux/sysfs.h> -#include <linux/iio/iio.h> -#include <linux/iio/sysfs.h> -#include <linux/spi/spi.h> -#include "meter.h" - -#define ADE7753_WAVEFORM 0x01 -#define ADE7753_AENERGY 0x02 -#define ADE7753_RAENERGY 0x03 -#define ADE7753_LAENERGY 0x04 -#define ADE7753_VAENERGY 0x05 -#define ADE7753_RVAENERGY 0x06 -#define ADE7753_LVAENERGY 0x07 -#define ADE7753_LVARENERGY 0x08 -#define ADE7753_MODE 0x09 -#define ADE7753_IRQEN 0x0A -#define ADE7753_STATUS 0x0B -#define ADE7753_RSTSTATUS 0x0C -#define ADE7753_CH1OS 0x0D -#define ADE7753_CH2OS 0x0E -#define ADE7753_GAIN 0x0F -#define ADE7753_PHCAL 0x10 -#define ADE7753_APOS 0x11 -#define ADE7753_WGAIN 0x12 -#define ADE7753_WDIV 0x13 -#define ADE7753_CFNUM 0x14 -#define ADE7753_CFDEN 0x15 -#define ADE7753_IRMS 0x16 -#define ADE7753_VRMS 0x17 -#define ADE7753_IRMSOS 0x18 -#define ADE7753_VRMSOS 0x19 -#define ADE7753_VAGAIN 0x1A -#define ADE7753_VADIV 0x1B -#define ADE7753_LINECYC 0x1C -#define ADE7753_ZXTOUT 0x1D -#define ADE7753_SAGCYC 0x1E -#define ADE7753_SAGLVL 0x1F -#define ADE7753_IPKLVL 0x20 -#define ADE7753_VPKLVL 0x21 -#define ADE7753_IPEAK 0x22 -#define ADE7753_RSTIPEAK 0x23 -#define ADE7753_VPEAK 0x24 -#define ADE7753_RSTVPEAK 0x25 -#define ADE7753_TEMP 0x26 -#define ADE7753_PERIOD 0x27 -#define ADE7753_TMODE 0x3D -#define ADE7753_CHKSUM 0x3E -#define ADE7753_DIEREV 0x3F - -#define ADE7753_READ_REG(a) a -#define ADE7753_WRITE_REG(a) ((a) | 0x80) - -#define ADE7753_MAX_TX 4 -#define ADE7753_MAX_RX 4 -#define ADE7753_STARTUP_DELAY 1000 - -#define ADE7753_SPI_SLOW (u32)(300 * 1000) -#define ADE7753_SPI_BURST (u32)(1000 * 1000) -#define ADE7753_SPI_FAST (u32)(2000 * 1000) - -/** - * struct ade7753_state - device instance specific data - * @us: actual spi_device - * @tx: transmit buffer - * @rx: receive buffer - * @buf_lock: mutex to protect tx, rx and write frequency - **/ -struct ade7753_state { - struct spi_device *us; - struct mutex buf_lock; - u8 tx[ADE7753_MAX_TX] ____cacheline_aligned; - u8 rx[ADE7753_MAX_RX]; -}; - -static int ade7753_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 ade7753_state *st = iio_priv(indio_dev); - - mutex_lock(&st->buf_lock); - st->tx[0] = ADE7753_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 __ade7753_spi_write_reg_16(struct device *dev, u8 reg_address, - u16 value) -{ - struct iio_dev *indio_dev = dev_to_iio_dev(dev); - struct ade7753_state *st = iio_priv(indio_dev); - - st->tx[0] = ADE7753_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 ade7753_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 ade7753_state *st = iio_priv(indio_dev); - - mutex_lock(&st->buf_lock); - ret = __ade7753_spi_write_reg_16(dev, reg_address, value); - mutex_unlock(&st->buf_lock); - - return ret; -} - -static int ade7753_spi_read_reg_8(struct device *dev, - u8 reg_address, - u8 *val) -{ - struct iio_dev *indio_dev = dev_to_iio_dev(dev); - struct ade7753_state *st = iio_priv(indio_dev); - ssize_t ret; - - ret = spi_w8r8(st->us, ADE7753_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 ade7753_spi_read_reg_16(struct device *dev, - u8 reg_address, - u16 *val) -{ - struct iio_dev *indio_dev = dev_to_iio_dev(dev); - struct ade7753_state *st = iio_priv(indio_dev); - ssize_t ret; - - ret = spi_w8r16be(st->us, ADE7753_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 ade7753_spi_read_reg_24(struct device *dev, - u8 reg_address, - u32 *val) -{ - struct iio_dev *indio_dev = dev_to_iio_dev(dev); - struct ade7753_state *st = iio_priv(indio_dev); - int ret; - struct spi_transfer xfers[] = { - { - .tx_buf = st->tx, - .bits_per_word = 8, - .len = 1, - }, { - .rx_buf = st->tx, - .bits_per_word = 8, - .len = 3, - } - }; - - mutex_lock(&st->buf_lock); - st->tx[0] = ADE7753_READ_REG(reg_address); - - 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[0] << 16) | (st->rx[1] << 8) | st->rx[2]; - -error_ret: - mutex_unlock(&st->buf_lock); - return ret; -} - -static ssize_t ade7753_read_8bit(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - int ret; - u8 val; - struct iio_dev_attr *this_attr = to_iio_dev_attr(attr); - - ret = ade7753_spi_read_reg_8(dev, this_attr->address, &val); - if (ret) - return ret; - - return sprintf(buf, "%u\n", val); -} - -static ssize_t ade7753_read_16bit(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - int ret; - u16 val; - struct iio_dev_attr *this_attr = to_iio_dev_attr(attr); - - ret = ade7753_spi_read_reg_16(dev, this_attr->address, &val); - if (ret) - return ret; - - return sprintf(buf, "%u\n", val); -} - -static ssize_t ade7753_read_24bit(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - int ret; - u32 val; - struct iio_dev_attr *this_attr = to_iio_dev_attr(attr); - - ret = ade7753_spi_read_reg_24(dev, this_attr->address, &val); - if (ret) - return ret; - - return sprintf(buf, "%u\n", val); -} - -static ssize_t ade7753_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 = ade7753_spi_write_reg_8(dev, this_attr->address, val); - -error_ret: - return ret ? ret : len; -} - -static ssize_t ade7753_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 = ade7753_spi_write_reg_16(dev, this_attr->address, val); - -error_ret: - return ret ? ret : len; -} - -static int ade7753_reset(struct device *dev) -{ - u16 val; - int ret; - - ret = ade7753_spi_read_reg_16(dev, ADE7753_MODE, &val); - if (ret) - return ret; - - val |= BIT(6); /* Software Chip Reset */ - - return ade7753_spi_write_reg_16(dev, ADE7753_MODE, val); -} - -static IIO_DEV_ATTR_AENERGY(ade7753_read_24bit, ADE7753_AENERGY); -static IIO_DEV_ATTR_LAENERGY(ade7753_read_24bit, ADE7753_LAENERGY); -static IIO_DEV_ATTR_VAENERGY(ade7753_read_24bit, ADE7753_VAENERGY); -static IIO_DEV_ATTR_LVAENERGY(ade7753_read_24bit, ADE7753_LVAENERGY); -static IIO_DEV_ATTR_CFDEN(0644, - ade7753_read_16bit, - ade7753_write_16bit, - ADE7753_CFDEN); -static IIO_DEV_ATTR_CFNUM(0644, - ade7753_read_8bit, - ade7753_write_8bit, - ADE7753_CFNUM); -static IIO_DEV_ATTR_CHKSUM(ade7753_read_8bit, ADE7753_CHKSUM); -static IIO_DEV_ATTR_PHCAL(0644, - ade7753_read_16bit, - ade7753_write_16bit, - ADE7753_PHCAL); -static IIO_DEV_ATTR_APOS(0644, - ade7753_read_16bit, - ade7753_write_16bit, - ADE7753_APOS); -static IIO_DEV_ATTR_SAGCYC(0644, - ade7753_read_8bit, - ade7753_write_8bit, - ADE7753_SAGCYC); -static IIO_DEV_ATTR_SAGLVL(0644, - ade7753_read_8bit, - ade7753_write_8bit, - ADE7753_SAGLVL); -static IIO_DEV_ATTR_LINECYC(0644, - ade7753_read_8bit, - ade7753_write_8bit, - ADE7753_LINECYC); -static IIO_DEV_ATTR_WDIV(0644, - ade7753_read_8bit, - ade7753_write_8bit, - ADE7753_WDIV); -static IIO_DEV_ATTR_IRMS(0644, - ade7753_read_24bit, - NULL, - ADE7753_IRMS); -static IIO_DEV_ATTR_VRMS(0444, - ade7753_read_24bit, - NULL, - ADE7753_VRMS); -static IIO_DEV_ATTR_IRMSOS(0644, - ade7753_read_16bit, - ade7753_write_16bit, - ADE7753_IRMSOS); -static IIO_DEV_ATTR_VRMSOS(0644, - ade7753_read_16bit, - ade7753_write_16bit, - ADE7753_VRMSOS); -static IIO_DEV_ATTR_WGAIN(0644, - ade7753_read_16bit, - ade7753_write_16bit, - ADE7753_WGAIN); -static IIO_DEV_ATTR_VAGAIN(0644, - ade7753_read_16bit, - ade7753_write_16bit, - ADE7753_VAGAIN); -static IIO_DEV_ATTR_PGA_GAIN(0644, - ade7753_read_16bit, - ade7753_write_16bit, - ADE7753_GAIN); -static IIO_DEV_ATTR_IPKLVL(0644, - ade7753_read_8bit, - ade7753_write_8bit, - ADE7753_IPKLVL); -static IIO_DEV_ATTR_VPKLVL(0644, - ade7753_read_8bit, - ade7753_write_8bit, - ADE7753_VPKLVL); -static IIO_DEV_ATTR_IPEAK(0444, - ade7753_read_24bit, - NULL, - ADE7753_IPEAK); -static IIO_DEV_ATTR_VPEAK(0444, - ade7753_read_24bit, - NULL, - ADE7753_VPEAK); -static IIO_DEV_ATTR_VPERIOD(0444, - ade7753_read_16bit, - NULL, - ADE7753_PERIOD); - -static IIO_DEVICE_ATTR(choff_1, 0644, - ade7753_read_8bit, - ade7753_write_8bit, - ADE7753_CH1OS); - -static IIO_DEVICE_ATTR(choff_2, 0644, - ade7753_read_8bit, - ade7753_write_8bit, - ADE7753_CH2OS); - -static int ade7753_set_irq(struct device *dev, bool enable) -{ - int ret; - u8 irqen; - - ret = ade7753_spi_read_reg_8(dev, ADE7753_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 = ade7753_spi_write_reg_8(dev, ADE7753_IRQEN, irqen); - -error_ret: - return ret; -} - -/* Power down the device */ -static int ade7753_stop_device(struct device *dev) -{ - u16 val; - int ret; - - ret = ade7753_spi_read_reg_16(dev, ADE7753_MODE, &val); - if (ret) - return ret; - - val |= BIT(4); /* AD converters can be turned off */ - - return ade7753_spi_write_reg_16(dev, ADE7753_MODE, val); -} - -static int ade7753_initial_setup(struct iio_dev *indio_dev) -{ - int ret; - struct device *dev = &indio_dev->dev; - struct ade7753_state *st = iio_priv(indio_dev); - - /* use low spi speed for init */ - st->us->mode = SPI_MODE_3; - spi_setup(st->us); - - /* Disable IRQ */ - ret = ade7753_set_irq(dev, false); - if (ret) { - dev_err(dev, "disable irq failed"); - goto err_ret; - } - - ade7753_reset(dev); - usleep_range(ADE7753_STARTUP_DELAY, ADE7753_STARTUP_DELAY + 100); - -err_ret: - return ret; -} - -static ssize_t ade7753_read_frequency(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - int ret; - u16 t; - int sps; - - ret = ade7753_spi_read_reg_16(dev, ADE7753_MODE, &t); - if (ret) - return ret; - - t = (t >> 11) & 0x3; - sps = 27900 / (1 + t); - - return sprintf(buf, "%d\n", sps); -} - -static ssize_t ade7753_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 ade7753_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 = ADE7753_SPI_SLOW; - else - st->us->max_speed_hz = ADE7753_SPI_FAST; - - ret = ade7753_spi_read_reg_16(dev, ADE7753_MODE, ®); - if (ret) - goto out; - - reg &= ~(3 << 11); - reg |= t << 11; - - ret = __ade7753_spi_write_reg_16(dev, ADE7753_MODE, reg); - -out: - mutex_unlock(&st->buf_lock); - - return ret ? ret : len; -} - -static IIO_DEV_ATTR_TEMP_RAW(ade7753_read_8bit); -static IIO_CONST_ATTR(in_temp_offset, "-25 C"); -static IIO_CONST_ATTR(in_temp_scale, "0.67 C"); - -static IIO_DEV_ATTR_SAMP_FREQ(0644, - ade7753_read_frequency, - ade7753_write_frequency); - -static IIO_CONST_ATTR_SAMP_FREQ_AVAIL("27900 14000 7000 3500"); - -static struct attribute *ade7753_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_laenergy.dev_attr.attr, - &iio_dev_attr_vaenergy.dev_attr.attr, - &iio_dev_attr_lvaenergy.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_chksum.dev_attr.attr, - &iio_dev_attr_pga_gain.dev_attr.attr, - &iio_dev_attr_wgain.dev_attr.attr, - &iio_dev_attr_choff_1.dev_attr.attr, - &iio_dev_attr_choff_2.dev_attr.attr, - &iio_dev_attr_wdiv.dev_attr.attr, - &iio_dev_attr_irms.dev_attr.attr, - &iio_dev_attr_vrms.dev_attr.attr, - &iio_dev_attr_irmsos.dev_attr.attr, - &iio_dev_attr_vrmsos.dev_attr.attr, - &iio_dev_attr_vagain.dev_attr.attr, - &iio_dev_attr_ipklvl.dev_attr.attr, - &iio_dev_attr_vpklvl.dev_attr.attr, - &iio_dev_attr_ipeak.dev_attr.attr, - &iio_dev_attr_vpeak.dev_attr.attr, - &iio_dev_attr_vperiod.dev_attr.attr, - NULL, -}; - -static const struct attribute_group ade7753_attribute_group = { - .attrs = ade7753_attributes, -}; - -static const struct iio_info ade7753_info = { - .attrs = &ade7753_attribute_group, -}; - -static int ade7753_probe(struct spi_device *spi) -{ - int ret; - struct ade7753_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 = &ade7753_info; - indio_dev->modes = INDIO_DIRECT_MODE; - - /* Get the device into a sane initial state */ - ret = ade7753_initial_setup(indio_dev); - if (ret) - return ret; - - return iio_device_register(indio_dev); -} - -static int ade7753_remove(struct spi_device *spi) -{ - struct iio_dev *indio_dev = spi_get_drvdata(spi); - - iio_device_unregister(indio_dev); - ade7753_stop_device(&indio_dev->dev); - - return 0; -} - -static struct spi_driver ade7753_driver = { - .driver = { - .name = "ade7753", - }, - .probe = ade7753_probe, - .remove = ade7753_remove, -}; -module_spi_driver(ade7753_driver); - -MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>"); -MODULE_DESCRIPTION("Analog Devices ADE7753/6 Single-Phase Multifunction Meter"); -MODULE_LICENSE("GPL v2"); -MODULE_ALIAS("spi:ade7753"); |