From: Barry Song <barry.song@xxxxxxxxxx> Signed-off-by: Barry Song <barry.song@xxxxxxxxxx> Signed-off-by: Mike Frysinger <vapier@xxxxxxxxxx> --- drivers/staging/iio/meter/Kconfig | 9 + drivers/staging/iio/meter/Makefile | 4 + drivers/staging/iio/meter/ade7758.h | 171 ++++++ drivers/staging/iio/meter/ade7758_core.c | 866 +++++++++++++++++++++++++++ drivers/staging/iio/meter/ade7758_ring.c | 252 ++++++++ drivers/staging/iio/meter/ade7758_trigger.c | 125 ++++ 6 files changed, 1427 insertions(+), 0 deletions(-) create mode 100644 drivers/staging/iio/meter/ade7758.h create mode 100644 drivers/staging/iio/meter/ade7758_core.c create mode 100644 drivers/staging/iio/meter/ade7758_ring.c create mode 100644 drivers/staging/iio/meter/ade7758_trigger.c diff --git a/drivers/staging/iio/meter/Kconfig b/drivers/staging/iio/meter/Kconfig index 19f20f4..be88bb8 100644 --- a/drivers/staging/iio/meter/Kconfig +++ b/drivers/staging/iio/meter/Kconfig @@ -16,3 +16,12 @@ config ADE7754 help Say yes here to build support for Analog Devices ADE7754 Polyphase Multifunction Energy Metering IC Driver. + +config ADE7758 + tristate "Analog Devices ADE7758 Poly Phase Multifunction Energy Metering IC Driver" + depends on SPI + select IIO_TRIGGER if IIO_RING_BUFFER + select IIO_SW_RING if IIO_RING_BUFFER + help + Say yes here to build support for Analog Devices ADE7758 Polyphase + Multifunction Energy Metering IC with Per Phase Information Driver. diff --git a/drivers/staging/iio/meter/Makefile b/drivers/staging/iio/meter/Makefile index 7f65b99..8e1a71d 100644 --- a/drivers/staging/iio/meter/Makefile +++ b/drivers/staging/iio/meter/Makefile @@ -4,3 +4,7 @@ obj-$(CONFIG_ADE7753) += ade7753.o obj-$(CONFIG_ADE7754) += ade7754.o + +ade7758-y := ade7758_core.o +ade7758-$(CONFIG_IIO_RING_BUFFER) += ade7758_ring.o ade7758_trigger.o +obj-$(CONFIG_ADE7758) += ade7758.o diff --git a/drivers/staging/iio/meter/ade7758.h b/drivers/staging/iio/meter/ade7758.h new file mode 100644 index 0000000..df5bb7b --- /dev/null +++ b/drivers/staging/iio/meter/ade7758.h @@ -0,0 +1,171 @@ +#ifndef _ADE7758_H +#define _ADE7758_H + +#define ADE7758_AWATTHR 0x01 +#define ADE7758_BWATTHR 0x02 +#define ADE7758_CWATTHR 0x03 +#define ADE7758_AVARHR 0x04 +#define ADE7758_BVARHR 0x05 +#define ADE7758_CVARHR 0x06 +#define ADE7758_AVAHR 0x07 +#define ADE7758_BVAHR 0x08 +#define ADE7758_CVAHR 0x09 +#define ADE7758_AIRMS 0x0A +#define ADE7758_BIRMS 0x0B +#define ADE7758_CIRMS 0x0C +#define ADE7758_AVRMS 0x0D +#define ADE7758_BVRMS 0x0E +#define ADE7758_CVRMS 0x0F +#define ADE7758_FREQ 0x10 +#define ADE7758_TEMP 0x11 +#define ADE7758_WFORM 0x12 +#define ADE7758_OPMODE 0x13 +#define ADE7758_MMODE 0x14 +#define ADE7758_WAVMODE 0x15 +#define ADE7758_COMPMODE 0x16 +#define ADE7758_LCYCMODE 0x17 +#define ADE7758_MASK 0x18 +#define ADE7758_STATUS 0x19 +#define ADE7758_RSTATUS 0x1A +#define ADE7758_ZXTOUT 0x1B +#define ADE7758_LINECYC 0x1C +#define ADE7758_SAGCYC 0x1D +#define ADE7758_SAGLVL 0x1E +#define ADE7758_VPINTLVL 0x1F +#define ADE7758_IPINTLVL 0x20 +#define ADE7758_VPEAK 0x21 +#define ADE7758_IPEAK 0x22 +#define ADE7758_GAIN 0x23 +#define ADE7758_AVRMSGAIN 0x24 +#define ADE7758_BVRMSGAIN 0x25 +#define ADE7758_CVRMSGAIN 0x26 +#define ADE7758_AIGAIN 0x27 +#define ADE7758_BIGAIN 0x28 +#define ADE7758_CIGAIN 0x29 +#define ADE7758_AWG 0x2A +#define ADE7758_BWG 0x2B +#define ADE7758_CWG 0x2C +#define ADE7758_AVARG 0x2D +#define ADE7758_BVARG 0x2E +#define ADE7758_CVARG 0x2F +#define ADE7758_AVAG 0x30 +#define ADE7758_BVAG 0x31 +#define ADE7758_CVAG 0x32 +#define ADE7758_AVRMSOS 0x33 +#define ADE7758_BVRMSOS 0x34 +#define ADE7758_CVRMSOS 0x35 +#define ADE7758_AIRMSOS 0x36 +#define ADE7758_BIRMSOS 0x37 +#define ADE7758_CIRMSOS 0x38 +#define ADE7758_AWAITOS 0x39 +#define ADE7758_BWAITOS 0x3A +#define ADE7758_CWAITOS 0x3B +#define ADE7758_AVAROS 0x3C +#define ADE7758_BVAROS 0x3D +#define ADE7758_CVAROS 0x3E +#define ADE7758_APHCAL 0x3F +#define ADE7758_BPHCAL 0x40 +#define ADE7758_CPHCAL 0x41 +#define ADE7758_WDIV 0x42 +#define ADE7758_VADIV 0x44 +#define ADE7758_VARDIV 0x43 +#define ADE7758_APCFNUM 0x45 +#define ADE7758_APCFDEN 0x46 +#define ADE7758_VARCFNUM 0x47 +#define ADE7758_VARCFDEN 0x48 +#define ADE7758_CHKSUM 0x7E +#define ADE7758_VERSION 0x7F + +#define ADE7758_READ_REG(a) a +#define ADE7758_WRITE_REG(a) ((a) | 0x80) + +#define ADE7758_MAX_TX 8 +#define ADE7758_MAX_RX 4 +#define ADE7758_STARTUP_DELAY 1 + +#define ADE7758_SPI_SLOW (u32)(300 * 1000) +#define ADE7758_SPI_BURST (u32)(1000 * 1000) +#define ADE7758_SPI_FAST (u32)(2000 * 1000) + +#define DRIVER_NAME "ade7758" + +/** + * struct ade7758_state - device instance specific data + * @us: actual spi_device + * @work_trigger_to_ring: bh for triggered event handling + * @inter: used to check if new interrupt has been triggered + * @last_timestamp: passing timestamp from th to bh of interrupt handler + * @indio_dev: industrial I/O device structure + * @trig: data ready trigger registered with iio + * @tx: transmit buffer + * @rx: recieve buffer + * @buf_lock: mutex to protect tx and rx + **/ +struct ade7758_state { + struct spi_device *us; + struct work_struct work_trigger_to_ring; + s64 last_timestamp; + struct iio_dev *indio_dev; + struct iio_trigger *trig; + u8 *tx; + u8 *rx; + struct mutex buf_lock; +}; +#ifdef CONFIG_IIO_RING_BUFFER +/* At the moment triggers are only used for ring buffer + * filling. This may change! + */ + +enum ade7758_scan { + ADE7758_SCAN_WFORM, +}; + +void ade7758_remove_trigger(struct iio_dev *indio_dev); +int ade7758_probe_trigger(struct iio_dev *indio_dev); + +ssize_t ade7758_read_data_from_ring(struct device *dev, + struct device_attribute *attr, + char *buf); + + +int ade7758_configure_ring(struct iio_dev *indio_dev); +void ade7758_unconfigure_ring(struct iio_dev *indio_dev); + +int ade7758_initialize_ring(struct iio_ring_buffer *ring); +void ade7758_uninitialize_ring(struct iio_ring_buffer *ring); +int ade7758_set_irq(struct device *dev, bool enable); +#else /* CONFIG_IIO_RING_BUFFER */ + +static inline void ade7758_remove_trigger(struct iio_dev *indio_dev) +{ +} +static inline int ade7758_probe_trigger(struct iio_dev *indio_dev) +{ + return 0; +} + +static inline ssize_t +ade7758_read_data_from_ring(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + return 0; +} + +static int ade7758_configure_ring(struct iio_dev *indio_dev) +{ + return 0; +} +static inline void ade7758_unconfigure_ring(struct iio_dev *indio_dev) +{ +} +static inline int ade7758_initialize_ring(struct iio_ring_buffer *ring) +{ + return 0; +} +static inline void ade7758_uninitialize_ring(struct iio_ring_buffer *ring) +{ +} +#endif /* CONFIG_IIO_RING_BUFFER */ + +#endif diff --git a/drivers/staging/iio/meter/ade7758_core.c b/drivers/staging/iio/meter/ade7758_core.c new file mode 100644 index 0000000..ed67792 --- /dev/null +++ b/drivers/staging/iio/meter/ade7758_core.c @@ -0,0 +1,866 @@ +/* + * ADE7758 Polyphase Multifunction Energy Metering IC Driver + * + * Copyright 2010 Analog Devices Inc. + * + * Licensed under the GPL-2 or later. + */ + +#include <linux/interrupt.h> +#include <linux/irq.h> +#include <linux/gpio.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 "../iio.h" +#include "../sysfs.h" +#include "meter.h" +#include "ade7758.h" + +int ade7758_spi_write_reg_8(struct device *dev, + u8 reg_address, + u8 val) +{ + int ret; + struct iio_dev *indio_dev = dev_get_drvdata(dev); + struct ade7758_state *st = iio_dev_get_devdata(indio_dev); + + mutex_lock(&st->buf_lock); + st->tx[0] = ADE7758_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 ade7758_spi_write_reg_16(struct device *dev, + u8 reg_address, + u16 value) +{ + int ret; + struct spi_message msg; + struct iio_dev *indio_dev = dev_get_drvdata(dev); + struct ade7758_state *st = iio_dev_get_devdata(indio_dev); + struct spi_transfer xfers[] = { + { + .tx_buf = st->tx, + .bits_per_word = 8, + .len = 3, + } + }; + + mutex_lock(&st->buf_lock); + st->tx[0] = ADE7758_WRITE_REG(reg_address); + st->tx[1] = (value >> 8) & 0xFF; + st->tx[2] = value & 0xFF; + + spi_message_init(&msg); + spi_message_add_tail(xfers, &msg); + ret = spi_sync(st->us, &msg); + mutex_unlock(&st->buf_lock); + + return ret; +} + +static int ade7758_spi_write_reg_24(struct device *dev, + u8 reg_address, + u32 value) +{ + int ret; + struct spi_message msg; + struct iio_dev *indio_dev = dev_get_drvdata(dev); + struct ade7758_state *st = iio_dev_get_devdata(indio_dev); + struct spi_transfer xfers[] = { + { + .tx_buf = st->tx, + .bits_per_word = 8, + .len = 4, + } + }; + + mutex_lock(&st->buf_lock); + st->tx[0] = ADE7758_WRITE_REG(reg_address); + st->tx[1] = (value >> 16) & 0xFF; + st->tx[2] = (value >> 8) & 0xFF; + st->tx[3] = value & 0xFF; + + spi_message_init(&msg); + spi_message_add_tail(xfers, &msg); + ret = spi_sync(st->us, &msg); + mutex_unlock(&st->buf_lock); + + return ret; +} + +static int ade7758_spi_read_reg_8(struct device *dev, + u8 reg_address, + u8 *val) +{ + struct spi_message msg; + struct iio_dev *indio_dev = dev_get_drvdata(dev); + struct ade7758_state *st = iio_dev_get_devdata(indio_dev); + int ret; + struct spi_transfer xfers[] = { + { + .tx_buf = st->tx, + .rx_buf = st->rx, + .bits_per_word = 8, + .len = 2, + }, + }; + + mutex_lock(&st->buf_lock); + st->tx[0] = ADE7758_READ_REG(reg_address); + st->tx[1] = 0; + + spi_message_init(&msg); + spi_message_add_tail(xfers, &msg); + ret = spi_sync(st->us, &msg); + if (ret) { + dev_err(&st->us->dev, "problem when reading 8 bit register 0x%02X", + reg_address); + goto error_ret; + } + *val = st->rx[1]; + +error_ret: + mutex_unlock(&st->buf_lock); + return ret; +} + +static int ade7758_spi_read_reg_16(struct device *dev, + u8 reg_address, + u16 *val) +{ + struct spi_message msg; + struct iio_dev *indio_dev = dev_get_drvdata(dev); + struct ade7758_state *st = iio_dev_get_devdata(indio_dev); + int ret; + struct spi_transfer xfers[] = { + { + .tx_buf = st->tx, + .rx_buf = st->rx, + .bits_per_word = 8, + .len = 3, + }, + }; + + mutex_lock(&st->buf_lock); + st->tx[0] = ADE7758_READ_REG(reg_address); + st->tx[1] = 0; + st->tx[2] = 0; + + spi_message_init(&msg); + spi_message_add_tail(xfers, &msg); + ret = spi_sync(st->us, &msg); + if (ret) { + dev_err(&st->us->dev, "problem when reading 16 bit register 0x%02X", + reg_address); + goto error_ret; + } + *val = (st->rx[1] << 8) | st->rx[2]; + +error_ret: + mutex_unlock(&st->buf_lock); + return ret; +} + +static int ade7758_spi_read_reg_24(struct device *dev, + u8 reg_address, + u32 *val) +{ + struct spi_message msg; + struct iio_dev *indio_dev = dev_get_drvdata(dev); + struct ade7758_state *st = iio_dev_get_devdata(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] = ADE7758_READ_REG(reg_address); + st->tx[1] = 0; + st->tx[2] = 0; + st->tx[3] = 0; + + spi_message_init(&msg); + spi_message_add_tail(xfers, &msg); + ret = spi_sync(st->us, &msg); + 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 ade7758_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 = ade7758_spi_read_reg_8(dev, this_attr->address, &val); + if (ret) + return ret; + + return sprintf(buf, "%u\n", val); +} + +static ssize_t ade7758_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 = ade7758_spi_read_reg_16(dev, this_attr->address, &val); + if (ret) + return ret; + + return sprintf(buf, "%u\n", val); +} + +static ssize_t ade7758_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 = ade7758_spi_read_reg_24(dev, this_attr->address, &val); + if (ret) + return ret; + + return sprintf(buf, "%u\n", val & 0xFFFFFF); +} + +static ssize_t ade7758_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; + long val; + + ret = strict_strtol(buf, 10, &val); + if (ret) + goto error_ret; + ret = ade7758_spi_write_reg_8(dev, this_attr->address, val); + +error_ret: + return ret ? ret : len; +} + +static ssize_t ade7758_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; + long val; + + ret = strict_strtol(buf, 10, &val); + if (ret) + goto error_ret; + ret = ade7758_spi_write_reg_16(dev, this_attr->address, val); + +error_ret: + return ret ? ret : len; +} + +int ade7758_reset(struct device *dev) +{ + int ret; + u8 val; + ade7758_spi_read_reg_8(dev, + ADE7758_OPMODE, + &val); + val |= 1 << 6; /* Software Chip Reset */ + ret = ade7758_spi_write_reg_8(dev, + ADE7758_OPMODE, + val); + + return ret; +} + +static ssize_t ade7758_write_reset(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t len) +{ + if (len < 1) + return -1; + switch (buf[0]) { + case '1': + case 'y': + case 'Y': + return ade7758_reset(dev); + } + return -1; +} + +static IIO_DEV_ATTR_VPEAK(S_IWUSR | S_IRUGO, + ade7758_read_8bit, + ade7758_write_8bit, + ADE7758_VPEAK); +static IIO_DEV_ATTR_IPEAK(S_IWUSR | S_IRUGO, + ade7758_read_8bit, + ade7758_write_8bit, + ADE7758_VPEAK); +static IIO_DEV_ATTR_APHCAL(S_IWUSR | S_IRUGO, + ade7758_read_8bit, + ade7758_write_8bit, + ADE7758_APHCAL); +static IIO_DEV_ATTR_BPHCAL(S_IWUSR | S_IRUGO, + ade7758_read_8bit, + ade7758_write_8bit, + ADE7758_BPHCAL); +static IIO_DEV_ATTR_CPHCAL(S_IWUSR | S_IRUGO, + ade7758_read_8bit, + ade7758_write_8bit, + ADE7758_CPHCAL); +static IIO_DEV_ATTR_WDIV(S_IWUSR | S_IRUGO, + ade7758_read_8bit, + ade7758_write_8bit, + ADE7758_WDIV); +static IIO_DEV_ATTR_VADIV(S_IWUSR | S_IRUGO, + ade7758_read_8bit, + ade7758_write_8bit, + ADE7758_VADIV); +static IIO_DEV_ATTR_AIRMS(S_IRUGO, + ade7758_read_24bit, + NULL, + ADE7758_AIRMS); +static IIO_DEV_ATTR_BIRMS(S_IRUGO, + ade7758_read_24bit, + NULL, + ADE7758_BIRMS); +static IIO_DEV_ATTR_CIRMS(S_IRUGO, + ade7758_read_24bit, + NULL, + ADE7758_CIRMS); +static IIO_DEV_ATTR_AVRMS(S_IRUGO, + ade7758_read_24bit, + NULL, + ADE7758_AVRMS); +static IIO_DEV_ATTR_BVRMS(S_IRUGO, + ade7758_read_24bit, + NULL, + ADE7758_BVRMS); +static IIO_DEV_ATTR_CVRMS(S_IRUGO, + ade7758_read_24bit, + NULL, + ADE7758_CVRMS); +static IIO_DEV_ATTR_AIRMSOS(S_IWUSR | S_IRUGO, + ade7758_read_16bit, + ade7758_write_16bit, + ADE7758_AIRMSOS); +static IIO_DEV_ATTR_BIRMSOS(S_IWUSR | S_IRUGO, + ade7758_read_16bit, + ade7758_write_16bit, + ADE7758_BIRMSOS); +static IIO_DEV_ATTR_CIRMSOS(S_IWUSR | S_IRUGO, + ade7758_read_16bit, + ade7758_write_16bit, + ADE7758_CIRMSOS); +static IIO_DEV_ATTR_AVRMSOS(S_IWUSR | S_IRUGO, + ade7758_read_16bit, + ade7758_write_16bit, + ADE7758_AVRMSOS); +static IIO_DEV_ATTR_BVRMSOS(S_IWUSR | S_IRUGO, + ade7758_read_16bit, + ade7758_write_16bit, + ADE7758_BVRMSOS); +static IIO_DEV_ATTR_CVRMSOS(S_IWUSR | S_IRUGO, + ade7758_read_16bit, + ade7758_write_16bit, + ADE7758_CVRMSOS); +static IIO_DEV_ATTR_AIGAIN(S_IWUSR | S_IRUGO, + ade7758_read_16bit, + ade7758_write_16bit, + ADE7758_AIGAIN); +static IIO_DEV_ATTR_BIGAIN(S_IWUSR | S_IRUGO, + ade7758_read_16bit, + ade7758_write_16bit, + ADE7758_BIGAIN); +static IIO_DEV_ATTR_CIGAIN(S_IWUSR | S_IRUGO, + ade7758_read_16bit, + ade7758_write_16bit, + ADE7758_CIGAIN); +static IIO_DEV_ATTR_AVRMSGAIN(S_IWUSR | S_IRUGO, + ade7758_read_16bit, + ade7758_write_16bit, + ADE7758_AVRMSGAIN); +static IIO_DEV_ATTR_BVRMSGAIN(S_IWUSR | S_IRUGO, + ade7758_read_16bit, + ade7758_write_16bit, + ADE7758_BVRMSGAIN); +static IIO_DEV_ATTR_CVRMSGAIN(S_IWUSR | S_IRUGO, + ade7758_read_16bit, + ade7758_write_16bit, + ADE7758_CVRMSGAIN); + +int ade7758_set_irq(struct device *dev, bool enable) +{ + int ret; + u32 irqen; + ret = ade7758_spi_read_reg_24(dev, ADE7758_MASK, &irqen); + if (ret) + goto error_ret; + + if (enable) + irqen |= 1 << 16; /* Enables an interrupt when a data is + present in the waveform register */ + else + irqen &= ~(1 << 16); + + ret = ade7758_spi_write_reg_24(dev, ADE7758_MASK, irqen); + if (ret) + goto error_ret; + +error_ret: + return ret; +} + +/* Power down the device */ +static int ade7758_stop_device(struct device *dev) +{ + int ret; + u8 val; + ade7758_spi_read_reg_8(dev, + ADE7758_OPMODE, + &val); + val |= 7 << 3; /* ADE7758 powered down */ + ret = ade7758_spi_write_reg_8(dev, + ADE7758_OPMODE, + val); + + return ret; +} + +static int ade7758_initial_setup(struct ade7758_state *st) +{ + int ret; + struct device *dev = &st->indio_dev->dev; + + /* use low spi speed for init */ + st->us->mode = SPI_MODE_3; + spi_setup(st->us); + + /* Disable IRQ */ + ret = ade7758_set_irq(dev, false); + if (ret) { + dev_err(dev, "disable irq failed"); + goto err_ret; + } + + ade7758_reset(dev); + msleep(ADE7758_STARTUP_DELAY); + +err_ret: + return ret; +} + +static ssize_t ade7758_read_frequency(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + int ret, len = 0; + u8 t; + int sps; + ret = ade7758_spi_read_reg_8(dev, + ADE7758_WAVMODE, + &t); + if (ret) + return ret; + + t = (t >> 5) & 0x3; + sps = 26040 / (1 << t); + + len = sprintf(buf, "%d SPS\n", sps); + return len; +} + +static ssize_t ade7758_write_frequency(struct device *dev, + struct device_attribute *attr, + const char *buf, + size_t len) +{ + struct iio_dev *indio_dev = dev_get_drvdata(dev); + struct ade7758_state *st = iio_dev_get_devdata(indio_dev); + unsigned long val; + int ret; + u8 reg, t; + + ret = strict_strtol(buf, 10, &val); + if (ret) + return ret; + + mutex_lock(&indio_dev->mlock); + + t = (26040 / val); + if (t > 0) + t >>= 1; + + if (t > 1) + st->us->max_speed_hz = ADE7758_SPI_SLOW; + else + st->us->max_speed_hz = ADE7758_SPI_FAST; + + ret = ade7758_spi_read_reg_8(dev, + ADE7758_WAVMODE, + ®); + if (ret) + goto out; + + reg &= ~(5 << 3); + reg |= t << 5; + + ret = ade7758_spi_write_reg_8(dev, + ADE7758_WAVMODE, + reg); + +out: + mutex_unlock(&indio_dev->mlock); + + return ret ? ret : len; +} + +static ssize_t ade7758_read_waveform_type(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + int ret, len = 0; + u8 t; + ret = ade7758_spi_read_reg_8(dev, + ADE7758_WAVMODE, + &t); + if (ret) + return ret; + + t = (t >> 2) & 0x7; + + len = sprintf(buf, "%d\n", t); + + return len; +} + +static ssize_t ade7758_write_waveform_type(struct device *dev, + struct device_attribute *attr, + const char *buf, + size_t len) +{ + struct iio_dev *indio_dev = dev_get_drvdata(dev); + unsigned long val; + int ret; + u8 reg; + + ret = strict_strtol(buf, 10, &val); + if (ret) + return ret; + + if (val > 4) + return -EINVAL; + + mutex_lock(&indio_dev->mlock); + + ret = ade7758_spi_read_reg_8(dev, + ADE7758_WAVMODE, + ®); + if (ret) + goto out; + + reg &= ~(7 << 2); + reg |= val << 2; + + ret = ade7758_spi_write_reg_8(dev, + ADE7758_WAVMODE, + reg); + +out: + mutex_unlock(&indio_dev->mlock); + + return ret ? ret : len; +} + +static IIO_DEV_ATTR_TEMP(ade7758_read_8bit); +static IIO_CONST_ATTR(temp_offset, "129 C"); +static IIO_CONST_ATTR(temp_scale, "4 C"); + +static IIO_DEV_ATTR_AWATTHR(ade7758_read_16bit, + ADE7758_AWATTHR); +static IIO_DEV_ATTR_BWATTHR(ade7758_read_16bit, + ADE7758_BWATTHR); +static IIO_DEV_ATTR_CWATTHR(ade7758_read_16bit, + ADE7758_CWATTHR); +static IIO_DEV_ATTR_AVARHR(ade7758_read_16bit, + ADE7758_AVARHR); +static IIO_DEV_ATTR_BVARHR(ade7758_read_16bit, + ADE7758_BVARHR); +static IIO_DEV_ATTR_CVARHR(ade7758_read_16bit, + ADE7758_CVARHR); +static IIO_DEV_ATTR_AVAHR(ade7758_read_16bit, + ADE7758_AVAHR); +static IIO_DEV_ATTR_BVAHR(ade7758_read_16bit, + ADE7758_BVAHR); +static IIO_DEV_ATTR_CVAHR(ade7758_read_16bit, + ADE7758_CVAHR); + +static IIO_DEV_ATTR_SAMP_FREQ(S_IWUSR | S_IRUGO, + ade7758_read_frequency, + ade7758_write_frequency); + +/** + * IIO_DEV_ATTR_WAVEFORM_TYPE - set the type of waveform. + * @_mode: sysfs file mode/permissions + * @_show: output method for the attribute + * @_store: input method for the attribute + **/ +#define IIO_DEV_ATTR_WAVEFORM_TYPE(_mode, _show, _store) \ + IIO_DEVICE_ATTR(waveform_type, _mode, _show, _store, 0) + +static IIO_DEV_ATTR_WAVEFORM_TYPE(S_IWUSR | S_IRUGO, + ade7758_read_waveform_type, + ade7758_write_waveform_type); + +static IIO_DEV_ATTR_RESET(ade7758_write_reset); + +static IIO_CONST_ATTR_AVAIL_SAMP_FREQ("26000 13000 65000 33000"); + +static IIO_CONST_ATTR(name, "ade7758"); + +static struct attribute *ade7758_event_attributes[] = { + NULL +}; + +static struct attribute_group ade7758_event_attribute_group = { + .attrs = ade7758_event_attributes, +}; + +static struct attribute *ade7758_attributes[] = { + &iio_dev_attr_temp.dev_attr.attr, + &iio_const_attr_temp_offset.dev_attr.attr, + &iio_const_attr_temp_scale.dev_attr.attr, + &iio_dev_attr_sampling_frequency.dev_attr.attr, + &iio_dev_attr_waveform_type.dev_attr.attr, + &iio_const_attr_available_sampling_frequency.dev_attr.attr, + &iio_dev_attr_reset.dev_attr.attr, + &iio_const_attr_name.dev_attr.attr, + &iio_dev_attr_awatthr.dev_attr.attr, + &iio_dev_attr_bwatthr.dev_attr.attr, + &iio_dev_attr_cwatthr.dev_attr.attr, + &iio_dev_attr_avarhr.dev_attr.attr, + &iio_dev_attr_bvarhr.dev_attr.attr, + &iio_dev_attr_cvarhr.dev_attr.attr, + &iio_dev_attr_avahr.dev_attr.attr, + &iio_dev_attr_bvahr.dev_attr.attr, + &iio_dev_attr_cvahr.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_wdiv.dev_attr.attr, + &iio_dev_attr_vadiv.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_aigain.dev_attr.attr, + &iio_dev_attr_bigain.dev_attr.attr, + &iio_dev_attr_cigain.dev_attr.attr, + &iio_dev_attr_avrmsgain.dev_attr.attr, + &iio_dev_attr_bvrmsgain.dev_attr.attr, + &iio_dev_attr_cvrmsgain.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 ade7758_attribute_group = { + .attrs = ade7758_attributes, +}; + + + +static int __devinit ade7758_probe(struct spi_device *spi) +{ + int ret, regdone = 0; + struct ade7758_state *st = kzalloc(sizeof *st, GFP_KERNEL); + if (!st) { + ret = -ENOMEM; + goto error_ret; + } + /* this is only used for removal purposes */ + spi_set_drvdata(spi, st); + + /* Allocate the comms buffers */ + st->rx = kzalloc(sizeof(*st->rx)*ADE7758_MAX_RX, GFP_KERNEL); + if (st->rx == NULL) { + ret = -ENOMEM; + goto error_free_st; + } + st->tx = kzalloc(sizeof(*st->tx)*ADE7758_MAX_TX, GFP_KERNEL); + if (st->tx == NULL) { + ret = -ENOMEM; + goto error_free_rx; + } + st->us = spi; + mutex_init(&st->buf_lock); + /* setup the industrialio driver allocated elements */ + st->indio_dev = iio_allocate_device(); + if (st->indio_dev == NULL) { + ret = -ENOMEM; + goto error_free_tx; + } + + st->indio_dev->dev.parent = &spi->dev; + st->indio_dev->num_interrupt_lines = 1; + st->indio_dev->event_attrs = &ade7758_event_attribute_group; + st->indio_dev->attrs = &ade7758_attribute_group; + st->indio_dev->dev_data = (void *)(st); + st->indio_dev->driver_module = THIS_MODULE; + st->indio_dev->modes = INDIO_DIRECT_MODE; + + ret = ade7758_configure_ring(st->indio_dev); + if (ret) + goto error_free_dev; + + ret = iio_device_register(st->indio_dev); + if (ret) + goto error_unreg_ring_funcs; + regdone = 1; + + ret = ade7758_initialize_ring(st->indio_dev->ring); + if (ret) { + printk(KERN_ERR "failed to initialize the ring\n"); + goto error_unreg_ring_funcs; + } + + if (spi->irq) { + ret = iio_register_interrupt_line(spi->irq, + st->indio_dev, + 0, + IRQF_TRIGGER_FALLING, + "ade7758"); + if (ret) + goto error_uninitialize_ring; + + ret = ade7758_probe_trigger(st->indio_dev); + if (ret) + goto error_unregister_line; + } + + /* Get the device into a sane initial state */ + ret = ade7758_initial_setup(st); + if (ret) + goto error_remove_trigger; + return 0; + +error_remove_trigger: + if (st->indio_dev->modes & INDIO_RING_TRIGGERED) + ade7758_remove_trigger(st->indio_dev); +error_unregister_line: + if (st->indio_dev->modes & INDIO_RING_TRIGGERED) + iio_unregister_interrupt_line(st->indio_dev, 0); +error_uninitialize_ring: + ade7758_uninitialize_ring(st->indio_dev->ring); +error_unreg_ring_funcs: + ade7758_unconfigure_ring(st->indio_dev); +error_free_dev: + if (regdone) + iio_device_unregister(st->indio_dev); + else + iio_free_device(st->indio_dev); +error_free_tx: + kfree(st->tx); +error_free_rx: + kfree(st->rx); +error_free_st: + kfree(st); +error_ret: + return ret; +} + +static int ade7758_remove(struct spi_device *spi) +{ + int ret; + struct ade7758_state *st = spi_get_drvdata(spi); + struct iio_dev *indio_dev = st->indio_dev; + + ret = ade7758_stop_device(&(indio_dev->dev)); + if (ret) + goto err_ret; + + flush_scheduled_work(); + + ade7758_remove_trigger(indio_dev); + if (spi->irq && gpio_is_valid(irq_to_gpio(spi->irq)) > 0) + iio_unregister_interrupt_line(indio_dev, 0); + + ade7758_uninitialize_ring(indio_dev->ring); + iio_device_unregister(indio_dev); + ade7758_unconfigure_ring(indio_dev); + kfree(st->tx); + kfree(st->rx); + kfree(st); + + return 0; + +err_ret: + return ret; +} + +static struct spi_driver ade7758_driver = { + .driver = { + .name = "ade7758", + .owner = THIS_MODULE, + }, + .probe = ade7758_probe, + .remove = __devexit_p(ade7758_remove), +}; + +static __init int ade7758_init(void) +{ + return spi_register_driver(&ade7758_driver); +} +module_init(ade7758_init); + +static __exit void ade7758_exit(void) +{ + spi_unregister_driver(&ade7758_driver); +} +module_exit(ade7758_exit); + +MODULE_AUTHOR("Barry Song <21cnbao@xxxxxxxxx>"); +MODULE_DESCRIPTION("Analog Devices ADE7758 Polyphase Multifunction Energy Metering IC Driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/staging/iio/meter/ade7758_ring.c b/drivers/staging/iio/meter/ade7758_ring.c new file mode 100644 index 0000000..543892a --- /dev/null +++ b/drivers/staging/iio/meter/ade7758_ring.c @@ -0,0 +1,252 @@ +#include <linux/interrupt.h> +#include <linux/irq.h> +#include <linux/gpio.h> +#include <linux/workqueue.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 "../iio.h" +#include "../sysfs.h" +#include "../ring_sw.h" +#include "../accel/accel.h" +#include "../trigger.h" +#include "ade7758.h" + +/** + * combine_8_to_32() utility function to munge to u8s into u32 + **/ +static inline u32 combine_8_to_32(u8 lower, u8 mid, u8 upper) +{ + u32 _lower = lower; + u32 _mid = mid; + u32 _upper = upper; + + return _lower | (_mid << 8) | (_upper << 16); +} + +static IIO_SCAN_EL_C(wform, ADE7758_SCAN_WFORM, IIO_SIGNED(24), + ADE7758_WFORM, NULL); + +static IIO_SCAN_EL_TIMESTAMP(1); + +static struct attribute *ade7758_scan_el_attrs[] = { + &iio_scan_el_wform.dev_attr.attr, + &iio_scan_el_timestamp.dev_attr.attr, + NULL, +}; + +static struct attribute_group ade7758_scan_el_group = { + .attrs = ade7758_scan_el_attrs, + .name = "scan_elements", +}; + +/** + * ade7758_poll_func_th() top half interrupt handler called by trigger + * @private_data: iio_dev + **/ +static void ade7758_poll_func_th(struct iio_dev *indio_dev, s64 time) +{ + struct ade7758_state *st = iio_dev_get_devdata(indio_dev); + st->last_timestamp = time; + schedule_work(&st->work_trigger_to_ring); + /* Indicate that this interrupt is being handled */ + + /* Technically this is trigger related, but without this + * handler running there is currently no way for the interrupt + * to clear. + */ +} + +/** + * ade7758_spi_read_burst() - read all data registers + * @dev: device associated with child of actual device (iio_dev or iio_trig) + * @rx: somewhere to pass back the value read (min size is 24 bytes) + **/ +static int ade7758_spi_read_burst(struct device *dev, u8 *rx) +{ + struct spi_message msg; + struct iio_dev *indio_dev = dev_get_drvdata(dev); + struct ade7758_state *st = iio_dev_get_devdata(indio_dev); + int ret; + + struct spi_transfer xfers[] = { + { + .tx_buf = st->tx, + .rx_buf = rx, + .bits_per_word = 8, + .len = 4, + }, { + .tx_buf = st->tx + 4, + .rx_buf = rx, + .bits_per_word = 8, + .len = 4, + }, + }; + + mutex_lock(&st->buf_lock); + st->tx[0] = ADE7758_READ_REG(ADE7758_RSTATUS); + st->tx[1] = 0; + st->tx[2] = 0; + st->tx[3] = 0; + st->tx[4] = ADE7758_READ_REG(ADE7758_WFORM); + st->tx[5] = 0; + st->tx[6] = 0; + st->tx[7] = 0; + + spi_message_init(&msg); + spi_message_add_tail(&xfers[0], &msg); + spi_message_add_tail(&xfers[1], &msg); + ret = spi_sync(st->us, &msg); + if (ret) + dev_err(&st->us->dev, "problem when reading WFORM value\n"); + + mutex_unlock(&st->buf_lock); + + return ret; +} + +/* Whilst this makes a lot of calls to iio_sw_ring functions - it is to device + * specific to be rolled into the core. + */ +static void ade7758_trigger_bh_to_ring(struct work_struct *work_s) +{ + struct ade7758_state *st + = container_of(work_s, struct ade7758_state, + work_trigger_to_ring); + + int i = 0; + s32 *data; + size_t datasize = st->indio_dev + ->ring->access.get_bpd(st->indio_dev->ring); + + data = kmalloc(datasize , GFP_KERNEL); + if (data == NULL) { + dev_err(&st->us->dev, "memory alloc failed in ring bh"); + return; + } + + if (st->indio_dev->scan_count) + if (ade7758_spi_read_burst(&st->indio_dev->dev, st->rx) >= 0) + for (; i < st->indio_dev->scan_count; i++) { + data[i] = combine_8_to_32(st->rx[i*2+2], + st->rx[i*2+1], + st->rx[i*2]); + } + + /* Guaranteed to be aligned with 8 byte boundary */ + if (st->indio_dev->scan_timestamp) + *((s64 *) + (((u32)data + 4 * st->indio_dev->scan_count + 4) & ~0x7)) = + st->last_timestamp; + + st->indio_dev->ring->access.store_to(st->indio_dev->ring, + (u8 *)data, + st->last_timestamp); + + iio_trigger_notify_done(st->indio_dev->trig); + kfree(data); + + return; +} + +/* in these circumstances is it better to go with unaligned packing and + * deal with the cost?*/ +static int ade7758_data_rdy_ring_preenable(struct iio_dev *indio_dev) +{ + size_t size; + dev_dbg(&indio_dev->dev, "%s\n", __func__); + /* Check if there are any scan elements enabled, if not fail*/ + if (!(indio_dev->scan_count || indio_dev->scan_timestamp)) + return -EINVAL; + + if (indio_dev->ring->access.set_bpd) { + if (indio_dev->scan_timestamp) + if (indio_dev->scan_count) /* Timestamp and data */ + size = 2 * sizeof(s64); + else /* Timestamp only */ + size = sizeof(s64); + else /* Data only */ + size = indio_dev->scan_count*sizeof(s32); + indio_dev->ring->access.set_bpd(indio_dev->ring, size); + } + + return 0; +} + +static int ade7758_data_rdy_ring_postenable(struct iio_dev *indio_dev) +{ + return indio_dev->trig + ? iio_trigger_attach_poll_func(indio_dev->trig, + indio_dev->pollfunc) + : 0; +} + +static int ade7758_data_rdy_ring_predisable(struct iio_dev *indio_dev) +{ + return indio_dev->trig + ? iio_trigger_dettach_poll_func(indio_dev->trig, + indio_dev->pollfunc) + : 0; +} + +void ade7758_unconfigure_ring(struct iio_dev *indio_dev) +{ + kfree(indio_dev->pollfunc); + iio_sw_rb_free(indio_dev->ring); +} + +int ade7758_configure_ring(struct iio_dev *indio_dev) +{ + int ret = 0; + struct ade7758_state *st = indio_dev->dev_data; + struct iio_ring_buffer *ring; + INIT_WORK(&st->work_trigger_to_ring, ade7758_trigger_bh_to_ring); + /* Set default scan mode */ + + iio_scan_mask_set(indio_dev, iio_scan_el_wform.number); + indio_dev->scan_timestamp = true; + + indio_dev->scan_el_attrs = &ade7758_scan_el_group; + + ring = iio_sw_rb_allocate(indio_dev); + if (!ring) { + ret = -ENOMEM; + return ret; + } + indio_dev->ring = ring; + /* Effectively select the ring buffer implementation */ + iio_ring_sw_register_funcs(&ring->access); + ring->preenable = &ade7758_data_rdy_ring_preenable; + ring->postenable = &ade7758_data_rdy_ring_postenable; + ring->predisable = &ade7758_data_rdy_ring_predisable; + ring->owner = THIS_MODULE; + + indio_dev->pollfunc = kzalloc(sizeof(*indio_dev->pollfunc), GFP_KERNEL); + if (indio_dev->pollfunc == NULL) { + ret = -ENOMEM; + goto error_iio_sw_rb_free;; + } + indio_dev->pollfunc->poll_func_main = &ade7758_poll_func_th; + indio_dev->pollfunc->private_data = indio_dev; + indio_dev->modes |= INDIO_RING_TRIGGERED; + return 0; + +error_iio_sw_rb_free: + iio_sw_rb_free(indio_dev->ring); + return ret; +} + +int ade7758_initialize_ring(struct iio_ring_buffer *ring) +{ + return iio_ring_buffer_register(ring, 0); +} + +void ade7758_uninitialize_ring(struct iio_ring_buffer *ring) +{ + iio_ring_buffer_unregister(ring); +} diff --git a/drivers/staging/iio/meter/ade7758_trigger.c b/drivers/staging/iio/meter/ade7758_trigger.c new file mode 100644 index 0000000..60abca0 --- /dev/null +++ b/drivers/staging/iio/meter/ade7758_trigger.c @@ -0,0 +1,125 @@ +#include <linux/interrupt.h> +#include <linux/irq.h> +#include <linux/mutex.h> +#include <linux/device.h> +#include <linux/kernel.h> +#include <linux/sysfs.h> +#include <linux/list.h> +#include <linux/spi/spi.h> + +#include "../iio.h" +#include "../sysfs.h" +#include "../trigger.h" +#include "ade7758.h" + +/** + * ade7758_data_rdy_trig_poll() the event handler for the data rdy trig + **/ +static int ade7758_data_rdy_trig_poll(struct iio_dev *dev_info, + int index, + s64 timestamp, + int no_test) +{ + struct ade7758_state *st = iio_dev_get_devdata(dev_info); + struct iio_trigger *trig = st->trig; + + iio_trigger_poll(trig, timestamp); + + return IRQ_HANDLED; +} + +IIO_EVENT_SH(data_rdy_trig, &ade7758_data_rdy_trig_poll); + +static DEVICE_ATTR(name, S_IRUGO, iio_trigger_read_name, NULL); + +static struct attribute *ade7758_trigger_attrs[] = { + &dev_attr_name.attr, + NULL, +}; + +static const struct attribute_group ade7758_trigger_attr_group = { + .attrs = ade7758_trigger_attrs, +}; + +/** + * ade7758_data_rdy_trigger_set_state() set datardy interrupt state + **/ +static int ade7758_data_rdy_trigger_set_state(struct iio_trigger *trig, + bool state) +{ + struct ade7758_state *st = trig->private_data; + struct iio_dev *indio_dev = st->indio_dev; + int ret = 0; + + dev_dbg(&indio_dev->dev, "%s (%d)\n", __func__, state); + ret = ade7758_set_irq(&st->indio_dev->dev, state); + if (state == false) { + iio_remove_event_from_list(&iio_event_data_rdy_trig, + &indio_dev->interrupts[0] + ->ev_list); + /* possible quirk with handler currently worked around + by ensuring the work queue is empty */ + flush_scheduled_work(); + } else { + iio_add_event_to_list(&iio_event_data_rdy_trig, + &indio_dev->interrupts[0]->ev_list); + } + return ret; +} + +/** + * ade7758_trig_try_reen() try renabling irq for data rdy trigger + * @trig: the datardy trigger + **/ +static int ade7758_trig_try_reen(struct iio_trigger *trig) +{ + struct ade7758_state *st = trig->private_data; + enable_irq(st->us->irq); + /* irq reenabled so success! */ + return 0; +} + +int ade7758_probe_trigger(struct iio_dev *indio_dev) +{ + int ret; + struct ade7758_state *st = indio_dev->dev_data; + + st->trig = iio_allocate_trigger(); + st->trig->name = kasprintf(GFP_KERNEL, + "ade7758-dev%d", + indio_dev->id); + if (!st->trig->name) { + ret = -ENOMEM; + goto error_free_trig; + } + st->trig->dev.parent = &st->us->dev; + st->trig->owner = THIS_MODULE; + st->trig->private_data = st; + st->trig->set_trigger_state = &ade7758_data_rdy_trigger_set_state; + st->trig->try_reenable = &ade7758_trig_try_reen; + st->trig->control_attrs = &ade7758_trigger_attr_group; + ret = iio_trigger_register(st->trig); + + /* select default trigger */ + indio_dev->trig = st->trig; + if (ret) + goto error_free_trig_name; + + return 0; + +error_free_trig_name: + kfree(st->trig->name); +error_free_trig: + iio_free_trigger(st->trig); + + return ret; +} + +void ade7758_remove_trigger(struct iio_dev *indio_dev) +{ + struct ade7758_state *state = indio_dev->dev_data; + + iio_trigger_unregister(state->trig); + kfree(state->trig->name); + iio_free_trigger(state->trig); +} -- 1.7.3.2 -- To unsubscribe from this list: send the line "unsubscribe linux-iio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html