diff options
Diffstat (limited to 'drivers/staging/iio/meter/ade7754.c')
| -rw-r--r-- | drivers/staging/iio/meter/ade7754.c | 664 |
1 files changed, 0 insertions, 664 deletions
diff --git a/drivers/staging/iio/meter/ade7754.c b/drivers/staging/iio/meter/ade7754.c deleted file mode 100644 index 9aa067736715..000000000000 --- a/drivers/staging/iio/meter/ade7754.c +++ /dev/null @@ -1,664 +0,0 @@ -/* - * 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"); |