| /* |
| * 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/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" |
| #include "ade7753.h" |
| |
| 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) |
| { |
| 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] = (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 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; |
| |
| ade7753_spi_read_reg_16(dev, ADE7753_MODE, &val); |
| 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(S_IWUSR | S_IRUGO, |
| ade7753_read_16bit, |
| ade7753_write_16bit, |
| ADE7753_CFDEN); |
| static IIO_DEV_ATTR_CFNUM(S_IWUSR | S_IRUGO, |
| ade7753_read_8bit, |
| ade7753_write_8bit, |
| ADE7753_CFNUM); |
| static IIO_DEV_ATTR_CHKSUM(ade7753_read_8bit, ADE7753_CHKSUM); |
| static IIO_DEV_ATTR_PHCAL(S_IWUSR | S_IRUGO, |
| ade7753_read_16bit, |
| ade7753_write_16bit, |
| ADE7753_PHCAL); |
| static IIO_DEV_ATTR_APOS(S_IWUSR | S_IRUGO, |
| ade7753_read_16bit, |
| ade7753_write_16bit, |
| ADE7753_APOS); |
| static IIO_DEV_ATTR_SAGCYC(S_IWUSR | S_IRUGO, |
| ade7753_read_8bit, |
| ade7753_write_8bit, |
| ADE7753_SAGCYC); |
| static IIO_DEV_ATTR_SAGLVL(S_IWUSR | S_IRUGO, |
| ade7753_read_8bit, |
| ade7753_write_8bit, |
| ADE7753_SAGLVL); |
| static IIO_DEV_ATTR_LINECYC(S_IWUSR | S_IRUGO, |
| ade7753_read_8bit, |
| ade7753_write_8bit, |
| ADE7753_LINECYC); |
| static IIO_DEV_ATTR_WDIV(S_IWUSR | S_IRUGO, |
| ade7753_read_8bit, |
| ade7753_write_8bit, |
| ADE7753_WDIV); |
| static IIO_DEV_ATTR_IRMS(S_IWUSR | S_IRUGO, |
| ade7753_read_24bit, |
| NULL, |
| ADE7753_IRMS); |
| static IIO_DEV_ATTR_VRMS(S_IRUGO, |
| ade7753_read_24bit, |
| NULL, |
| ADE7753_VRMS); |
| static IIO_DEV_ATTR_IRMSOS(S_IWUSR | S_IRUGO, |
| ade7753_read_16bit, |
| ade7753_write_16bit, |
| ADE7753_IRMSOS); |
| static IIO_DEV_ATTR_VRMSOS(S_IWUSR | S_IRUGO, |
| ade7753_read_16bit, |
| ade7753_write_16bit, |
| ADE7753_VRMSOS); |
| static IIO_DEV_ATTR_WGAIN(S_IWUSR | S_IRUGO, |
| ade7753_read_16bit, |
| ade7753_write_16bit, |
| ADE7753_WGAIN); |
| static IIO_DEV_ATTR_VAGAIN(S_IWUSR | S_IRUGO, |
| ade7753_read_16bit, |
| ade7753_write_16bit, |
| ADE7753_VAGAIN); |
| static IIO_DEV_ATTR_PGA_GAIN(S_IWUSR | S_IRUGO, |
| ade7753_read_16bit, |
| ade7753_write_16bit, |
| ADE7753_GAIN); |
| static IIO_DEV_ATTR_IPKLVL(S_IWUSR | S_IRUGO, |
| ade7753_read_8bit, |
| ade7753_write_8bit, |
| ADE7753_IPKLVL); |
| static IIO_DEV_ATTR_VPKLVL(S_IWUSR | S_IRUGO, |
| ade7753_read_8bit, |
| ade7753_write_8bit, |
| ADE7753_VPKLVL); |
| static IIO_DEV_ATTR_IPEAK(S_IRUGO, |
| ade7753_read_24bit, |
| NULL, |
| ADE7753_IPEAK); |
| static IIO_DEV_ATTR_VPEAK(S_IRUGO, |
| ade7753_read_24bit, |
| NULL, |
| ADE7753_VPEAK); |
| static IIO_DEV_ATTR_VPERIOD(S_IRUGO, |
| ade7753_read_16bit, |
| NULL, |
| ADE7753_PERIOD); |
| static IIO_DEV_ATTR_CH_OFF(1, S_IWUSR | S_IRUGO, |
| ade7753_read_8bit, |
| ade7753_write_8bit, |
| ADE7753_CH1OS); |
| static IIO_DEV_ATTR_CH_OFF(2, S_IWUSR | S_IRUGO, |
| 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; |
| |
| ade7753_spi_read_reg_16(dev, ADE7753_MODE, &val); |
| 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); |
| msleep(ADE7753_STARTUP_DELAY); |
| |
| 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(&indio_dev->mlock); |
| |
| 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(&indio_dev->mlock); |
| |
| 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(S_IWUSR | S_IRUGO, |
| 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, |
| .driver_module = THIS_MODULE, |
| }; |
| |
| 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); |
| } |
| |
| /* fixme, confirm ordering in this function */ |
| 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"); |