/* * ADE7753 Single-Phase Multifunction Metering IC with di/dt Sensor Interface * * Copyright 2010 Analog Devices Inc. * * Licensed under the GPL-2 or later. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #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 and rx **/ 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) { 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; 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_DEV_ATTR_CH_OFF(1, 0644, ade7753_read_8bit, ade7753_write_8bit, ADE7753_CH1OS); static IIO_DEV_ATTR_CH_OFF(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(&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(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, .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); } 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");