From 06f1962ab475bdee3ae17afbaecee5b23f3cd5f0 Mon Sep 17 00:00:00 2001 From: Barry Song Date: Sun, 16 May 2010 21:11:37 +0100 Subject: [PATCH 560/577] Staging: iio: adis16220 vibration sensor driver Signed-off-by: Barry Song Signed-off-by: Jonathan Cameron Signed-off-by: Greg Kroah-Hartman --- drivers/staging/iio/accel/Kconfig | 7 + drivers/staging/iio/accel/Makefile | 3 + drivers/staging/iio/accel/accel.h | 6 + drivers/staging/iio/accel/adis16220.h | 150 +++++++ drivers/staging/iio/accel/adis16220_core.c | 664 ++++++++++++++++++++++++++++ 5 files changed, 830 insertions(+), 0 deletions(-) create mode 100644 drivers/staging/iio/accel/adis16220.h create mode 100644 drivers/staging/iio/accel/adis16220_core.c diff --git a/drivers/staging/iio/accel/Kconfig b/drivers/staging/iio/accel/Kconfig index 8f3f70f..b4e57d1 100644 --- a/drivers/staging/iio/accel/Kconfig +++ b/drivers/staging/iio/accel/Kconfig @@ -12,6 +12,13 @@ config ADIS16209 Say yes here to build support for Analog Devices adis16209 dual-axis digital inclinometer and accelerometer. +config ADIS16220 + tristate "Analog Devices ADIS16220 Programmable Digital Vibration Sensor driver" + depends on SPI + help + Say yes here to build support for Analog Devices adis16220 programmable + digital vibration sensor. + config ADIS16240 tristate "Analog Devices ADIS16240 Programmable Impact Sensor and Recorder" depends on SPI diff --git a/drivers/staging/iio/accel/Makefile b/drivers/staging/iio/accel/Makefile index 0e6762c..c34b136 100644 --- a/drivers/staging/iio/accel/Makefile +++ b/drivers/staging/iio/accel/Makefile @@ -5,6 +5,9 @@ adis16209-y := adis16209_core.o adis16209-$(CONFIG_IIO_RING_BUFFER) += adis16209_ring.o adis16209_trigger.o obj-$(CONFIG_ADIS16209) += adis16209.o +adis16220-y := adis16220_core.o +obj-$(CONFIG_ADIS16220) += adis16220.o + adis16240-y := adis16240_core.o adis16240-$(CONFIG_IIO_RING_BUFFER) += adis16240_ring.o adis16240_trigger.o obj-$(CONFIG_ADIS16240) += adis16240.o diff --git a/drivers/staging/iio/accel/accel.h b/drivers/staging/iio/accel/accel.h index 059209c..1b6e37f 100644 --- a/drivers/staging/iio/accel/accel.h +++ b/drivers/staging/iio/accel/accel.h @@ -2,6 +2,9 @@ #include "../sysfs.h" /* Accelerometer types of attribute */ +#define IIO_DEV_ATTR_ACCEL_OFFSET(_mode, _show, _store, _addr) \ + IIO_DEVICE_ATTR(accel_offset, _mode, _show, _store, _addr) + #define IIO_DEV_ATTR_ACCEL_X_OFFSET(_mode, _show, _store, _addr) \ IIO_DEVICE_ATTR(accel_x_offset, _mode, _show, _store, _addr) @@ -20,6 +23,9 @@ #define IIO_DEV_ATTR_ACCEL_Z_GAIN(_mode, _show, _store, _addr) \ IIO_DEVICE_ATTR(accel_z_gain, _mode, _show, _store, _addr) +#define IIO_DEV_ATTR_ACCEL(_show, _addr) \ + IIO_DEVICE_ATTR(accel_raw, S_IRUGO, _show, NULL, _addr) + #define IIO_DEV_ATTR_ACCEL_X(_show, _addr) \ IIO_DEVICE_ATTR(accel_x_raw, S_IRUGO, _show, NULL, _addr) diff --git a/drivers/staging/iio/accel/adis16220.h b/drivers/staging/iio/accel/adis16220.h new file mode 100644 index 0000000..6b49f70 --- /dev/null +++ b/drivers/staging/iio/accel/adis16220.h @@ -0,0 +1,150 @@ +#ifndef SPI_ADIS16220_H_ +#define SPI_ADIS16220_H_ + +#define ADIS16220_STARTUP_DELAY 220 /* ms */ + +#define ADIS16220_READ_REG(a) a +#define ADIS16220_WRITE_REG(a) ((a) | 0x80) + +/* Flash memory write count */ +#define ADIS16220_FLASH_CNT 0x00 +/* Control, acceleration offset adjustment control */ +#define ADIS16220_ACCL_NULL 0x02 +/* Control, AIN1 offset adjustment control */ +#define ADIS16220_AIN1_NULL 0x04 +/* Control, AIN2 offset adjustment control */ +#define ADIS16220_AIN2_NULL 0x06 +/* Output, power supply during capture */ +#define ADIS16220_CAPT_SUPPLY 0x0A +/* Output, temperature during capture */ +#define ADIS16220_CAPT_TEMP 0x0C +/* Output, peak acceleration during capture */ +#define ADIS16220_CAPT_PEAKA 0x0E +/* Output, peak AIN1 level during capture */ +#define ADIS16220_CAPT_PEAK1 0x10 +/* Output, peak AIN2 level during capture */ +#define ADIS16220_CAPT_PEAK2 0x12 +/* Output, capture buffer for acceleration */ +#define ADIS16220_CAPT_BUFA 0x14 +/* Output, capture buffer for AIN1 */ +#define ADIS16220_CAPT_BUF1 0x16 +/* Output, capture buffer for AIN2 */ +#define ADIS16220_CAPT_BUF2 0x18 +/* Control, capture buffer address pointer */ +#define ADIS16220_CAPT_PNTR 0x1A +/* Control, capture control register */ +#define ADIS16220_CAPT_CTRL 0x1C +/* Control, capture period (automatic mode) */ +#define ADIS16220_CAPT_PRD 0x1E +/* Control, Alarm A, acceleration peak threshold */ +#define ADIS16220_ALM_MAGA 0x20 +/* Control, Alarm 1, AIN1 peak threshold */ +#define ADIS16220_ALM_MAG1 0x22 +/* Control, Alarm 2, AIN2 peak threshold */ +#define ADIS16220_ALM_MAG2 0x24 +/* Control, Alarm S, peak threshold */ +#define ADIS16220_ALM_MAGS 0x26 +/* Control, alarm configuration register */ +#define ADIS16220_ALM_CTRL 0x28 +/* Control, general I/O configuration */ +#define ADIS16220_GPIO_CTRL 0x32 +/* Control, self-test control, AIN configuration */ +#define ADIS16220_MSC_CTRL 0x34 +/* Control, digital I/O configuration */ +#define ADIS16220_DIO_CTRL 0x36 +/* Control, filter configuration */ +#define ADIS16220_AVG_CNT 0x38 +/* Status, system status */ +#define ADIS16220_DIAG_STAT 0x3C +/* Control, system commands */ +#define ADIS16220_GLOB_CMD 0x3E +/* Status, self-test response */ +#define ADIS16220_ST_DELTA 0x40 +/* Lot Identification Code 1 */ +#define ADIS16220_LOT_ID1 0x52 +/* Lot Identification Code 2 */ +#define ADIS16220_LOT_ID2 0x54 +/* Product identifier; convert to decimal = 16220 */ +#define ADIS16220_PROD_ID 0x56 +/* Serial number */ +#define ADIS16220_SERIAL_NUM 0x58 + +#define ADIS16220_CAPTURE_SIZE 2048 + +/* MSC_CTRL */ +#define ADIS16220_MSC_CTRL_SELF_TEST_EN (1 << 8) +#define ADIS16220_MSC_CTRL_POWER_SUP_COM_AIN1 (1 << 1) +#define ADIS16220_MSC_CTRL_POWER_SUP_COM_AIN2 (1 << 0) + +/* DIO_CTRL */ +#define ADIS16220_MSC_CTRL_DIO2_BUSY_IND (3<<4) +#define ADIS16220_MSC_CTRL_DIO1_BUSY_IND (3<<2) +#define ADIS16220_MSC_CTRL_DIO2_ACT_HIGH (1<<1) +#define ADIS16220_MSC_CTRL_DIO1_ACT_HIGH (1<<0) + +/* DIAG_STAT */ +/* AIN2 sample > ALM_MAG2 */ +#define ADIS16220_DIAG_STAT_ALM_MAG2 (1<<14) +/* AIN1 sample > ALM_MAG1 */ +#define ADIS16220_DIAG_STAT_ALM_MAG1 (1<<13) +/* Acceleration sample > ALM_MAGA */ +#define ADIS16220_DIAG_STAT_ALM_MAGA (1<<12) +/* Error condition programmed into ALM_MAGS[11:0] and ALM_CTRL[5:4] is true */ +#define ADIS16220_DIAG_STAT_ALM_MAGS (1<<11) +/* |Peak value in AIN2 data capture| > ALM_MAG2 */ +#define ADIS16220_DIAG_STAT_PEAK_AIN2 (1<<10) +/* |Peak value in AIN1 data capture| > ALM_MAG1 */ +#define ADIS16220_DIAG_STAT_PEAK_AIN1 (1<<9) +/* |Peak value in acceleration data capture| > ALM_MAGA */ +#define ADIS16220_DIAG_STAT_PEAK_ACCEL (1<<8) +/* Data ready, capture complete */ +#define ADIS16220_DIAG_STAT_DATA_RDY (1<<7) +#define ADIS16220_DIAG_STAT_FLASH_CHK (1<<6) +#define ADIS16220_DIAG_STAT_SELF_TEST (1<<5) +/* Capture period violation/interruption */ +#define ADIS16220_DIAG_STAT_VIOLATION (1<<4) +/* SPI communications failure */ +#define ADIS16220_DIAG_STAT_SPI_FAIL (1<<3) +/* Flash update failure */ +#define ADIS16220_DIAG_STAT_FLASH_UPT (1<<2) +/* Power supply above 3.625 V */ +#define ADIS16220_DIAG_STAT_POWER_HIGH (1<<1) +/* Power supply below 3.15 V */ +#define ADIS16220_DIAG_STAT_POWER_LOW (1<<0) + +/* GLOB_CMD */ +#define ADIS16220_GLOB_CMD_SW_RESET (1<<7) +#define ADIS16220_GLOB_CMD_SELF_TEST (1<<2) +#define ADIS16220_GLOB_CMD_PWR_DOWN (1<<1) + +#define ADIS16220_MAX_TX 2048 +#define ADIS16220_MAX_RX 2048 + +#define ADIS16220_SPI_BURST (u32)(1000 * 1000) +#define ADIS16220_SPI_FAST (u32)(2000 * 1000) + +/** + * struct adis16220_state - device instance specific data + * @us: actual spi_device + * @work_trigger_to_ring: bh for triggered event handling + * @work_cont_thresh: CLEAN + * @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 adis16220_state { + struct spi_device *us; + struct iio_dev *indio_dev; + u8 *tx; + u8 *rx; + struct bin_attribute accel_bin; + struct bin_attribute adc1_bin; + struct bin_attribute adc2_bin; + struct mutex buf_lock; +}; + +#endif /* SPI_ADIS16220_H_ */ diff --git a/drivers/staging/iio/accel/adis16220_core.c b/drivers/staging/iio/accel/adis16220_core.c new file mode 100644 index 0000000..8b845d9 --- /dev/null +++ b/drivers/staging/iio/accel/adis16220_core.c @@ -0,0 +1,664 @@ +/* + * ADIS16220 Programmable Digital Vibration Sensor driver + * + * Copyright 2010 Analog Devices Inc. + * + * Licensed under the GPL-2 or later. + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include + +#include "../iio.h" +#include "../sysfs.h" +#include "accel.h" +#include "../adc/adc.h" + +#include "adis16220.h" + +#define DRIVER_NAME "adis16220" + +static int adis16220_check_status(struct device *dev); + +/** + * adis16220_spi_write_reg_8() - write single byte to a register + * @dev: device associated with child of actual device (iio_dev or iio_trig) + * @reg_address: the address of the register to be written + * @val: the value to write + **/ +static int adis16220_spi_write_reg_8(struct device *dev, + u8 reg_address, + u8 val) +{ + int ret; + struct iio_dev *indio_dev = dev_get_drvdata(dev); + struct adis16220_state *st = iio_dev_get_devdata(indio_dev); + + mutex_lock(&st->buf_lock); + st->tx[0] = ADIS16220_WRITE_REG(reg_address); + st->tx[1] = val; + + ret = spi_write(st->us, st->tx, 2); + mutex_unlock(&st->buf_lock); + + return ret; +} + +/** + * adis16220_spi_write_reg_16() - write 2 bytes to a pair of registers + * @dev: device associated with child of actual device (iio_dev or iio_trig) + * @reg_address: the address of the lower of the two registers. Second register + * is assumed to have address one greater. + * @val: value to be written + **/ +static int adis16220_spi_write_reg_16(struct device *dev, + u8 lower_reg_address, + u16 value) +{ + int ret; + struct spi_message msg; + struct iio_dev *indio_dev = dev_get_drvdata(dev); + struct adis16220_state *st = iio_dev_get_devdata(indio_dev); + struct spi_transfer xfers[] = { + { + .tx_buf = st->tx, + .bits_per_word = 8, + .len = 2, + .cs_change = 1, + .delay_usecs = 25, + }, { + .tx_buf = st->tx + 2, + .bits_per_word = 8, + .len = 2, + .cs_change = 1, + .delay_usecs = 25, + }, + }; + + mutex_lock(&st->buf_lock); + st->tx[0] = ADIS16220_WRITE_REG(lower_reg_address); + st->tx[1] = value & 0xFF; + st->tx[2] = ADIS16220_WRITE_REG(lower_reg_address + 1); + st->tx[3] = (value >> 8) & 0xFF; + + spi_message_init(&msg); + spi_message_add_tail(&xfers[0], &msg); + spi_message_add_tail(&xfers[1], &msg); + ret = spi_sync(st->us, &msg); + mutex_unlock(&st->buf_lock); + + return ret; +} + +/** + * adis16220_spi_read_reg_16() - read 2 bytes from a 16-bit register + * @dev: device associated with child of actual device (iio_dev or iio_trig) + * @reg_address: the address of the lower of the two registers. Second register + * is assumed to have address one greater. + * @val: somewhere to pass back the value read + **/ +static int adis16220_spi_read_reg_16(struct device *dev, + u8 lower_reg_address, + u16 *val) +{ + struct spi_message msg; + struct iio_dev *indio_dev = dev_get_drvdata(dev); + struct adis16220_state *st = iio_dev_get_devdata(indio_dev); + int ret; + struct spi_transfer xfers[] = { + { + .tx_buf = st->tx, + .bits_per_word = 8, + .len = 2, + .cs_change = 1, + .delay_usecs = 25, + }, { + .rx_buf = st->rx, + .bits_per_word = 8, + .len = 2, + .cs_change = 1, + .delay_usecs = 25, + }, + }; + + mutex_lock(&st->buf_lock); + st->tx[0] = ADIS16220_READ_REG(lower_reg_address); + st->tx[1] = 0; + st->tx[2] = 0; + st->tx[3] = 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 16 bit register 0x%02X", + lower_reg_address); + goto error_ret; + } + *val = (st->rx[0] << 8) | st->rx[1]; + +error_ret: + mutex_unlock(&st->buf_lock); + return ret; +} + +static ssize_t adis16220_spi_read_signed(struct device *dev, + struct device_attribute *attr, + char *buf, + unsigned bits) +{ + int ret; + s16 val = 0; + unsigned shift = 16 - bits; + struct iio_dev_attr *this_attr = to_iio_dev_attr(attr); + + ret = adis16220_spi_read_reg_16(dev, this_attr->address, (u16 *)&val); + if (ret) + return ret; + + val = ((s16)(val << shift) >> shift); + return sprintf(buf, "%d\n", val); +} + +static ssize_t adis16220_read_12bit_unsigned(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 = adis16220_spi_read_reg_16(dev, this_attr->address, &val); + if (ret) + return ret; + + return sprintf(buf, "%u\n", val & 0x0FFF); +} + +static ssize_t adis16220_read_16bit(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct iio_dev *indio_dev = dev_get_drvdata(dev); + ssize_t ret; + + /* Take the iio_dev status lock */ + mutex_lock(&indio_dev->mlock); + ret = adis16220_spi_read_signed(dev, attr, buf, 16); + mutex_unlock(&indio_dev->mlock); + + return ret; +} + +static ssize_t adis16220_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 = adis16220_spi_write_reg_16(dev, this_attr->address, val); + +error_ret: + return ret ? ret : len; +} + +static int adis16220_capture(struct device *dev) +{ + int ret; + ret = adis16220_spi_write_reg_16(dev, + ADIS16220_GLOB_CMD, + 0xBF08); /* initiates a manual data capture */ + if (ret) + dev_err(dev, "problem beginning capture"); + + msleep(10); /* delay for capture to finish */ + + return ret; +} + +static int adis16220_reset(struct device *dev) +{ + int ret; + ret = adis16220_spi_write_reg_8(dev, + ADIS16220_GLOB_CMD, + ADIS16220_GLOB_CMD_SW_RESET); + if (ret) + dev_err(dev, "problem resetting device"); + + return ret; +} + +static ssize_t adis16220_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 adis16220_reset(dev) == 0 ? len : -EIO; + } + return -1; +} + +static ssize_t adis16220_write_capture(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 adis16220_capture(dev) == 0 ? len : -EIO; + } + return -1; +} + +static int adis16220_self_test(struct device *dev) +{ + int ret; + ret = adis16220_spi_write_reg_16(dev, + ADIS16220_MSC_CTRL, + ADIS16220_MSC_CTRL_SELF_TEST_EN); + if (ret) { + dev_err(dev, "problem starting self test"); + goto err_ret; + } + + adis16220_check_status(dev); + +err_ret: + return ret; +} + +static int adis16220_check_status(struct device *dev) +{ + u16 status; + int ret; + + ret = adis16220_spi_read_reg_16(dev, ADIS16220_DIAG_STAT, &status); + + if (ret < 0) { + dev_err(dev, "Reading status failed\n"); + goto error_ret; + } + ret = status & 0x7F; + + if (status & ADIS16220_DIAG_STAT_VIOLATION) + dev_err(dev, "Capture period violation/interruption\n"); + if (status & ADIS16220_DIAG_STAT_SPI_FAIL) + dev_err(dev, "SPI failure\n"); + if (status & ADIS16220_DIAG_STAT_FLASH_UPT) + dev_err(dev, "Flash update failed\n"); + if (status & ADIS16220_DIAG_STAT_POWER_HIGH) + dev_err(dev, "Power supply above 5.25V\n"); + if (status & ADIS16220_DIAG_STAT_POWER_LOW) + dev_err(dev, "Power supply below 4.75V\n"); + +error_ret: + return ret; +} + +static int adis16220_initial_setup(struct adis16220_state *st) +{ + int ret; + struct device *dev = &st->indio_dev->dev; + + /* Do self test */ + ret = adis16220_self_test(dev); + if (ret) { + dev_err(dev, "self test failure"); + goto err_ret; + } + + /* Read status register to check the result */ + ret = adis16220_check_status(dev); + if (ret) { + adis16220_reset(dev); + dev_err(dev, "device not playing ball -> reset"); + msleep(ADIS16220_STARTUP_DELAY); + ret = adis16220_check_status(dev); + if (ret) { + dev_err(dev, "giving up"); + goto err_ret; + } + } + + printk(KERN_INFO DRIVER_NAME ": at CS%d (irq %d)\n", + st->us->chip_select, st->us->irq); + +err_ret: + return ret; +} + +static ssize_t adis16220_capture_buffer_read(struct adis16220_state *st, + char *buf, + loff_t off, + size_t count, + int addr) +{ + struct spi_message msg; + struct spi_transfer xfers[] = { + { + .tx_buf = st->tx, + .bits_per_word = 8, + .len = 2, + .cs_change = 1, + .delay_usecs = 25, + }, { + .tx_buf = st->tx, + .rx_buf = st->rx, + .bits_per_word = 8, + .cs_change = 1, + .delay_usecs = 25, + }, + }; + int ret; + int i; + + if (unlikely(!count)) + return count; + + if ((off >= ADIS16220_CAPTURE_SIZE) || (count & 1) || (off & 1)) + return -EINVAL; + + if (off + count > ADIS16220_CAPTURE_SIZE) + count = ADIS16220_CAPTURE_SIZE - off; + + /* write the begin position of capture buffer */ + ret = adis16220_spi_write_reg_16(&st->indio_dev->dev, + ADIS16220_CAPT_PNTR, + off > 1); + if (ret) + return -EIO; + + /* read count/2 values from capture buffer */ + mutex_lock(&st->buf_lock); + + for (i = 0; i < count; i += 2) { + st->tx[i] = ADIS16220_READ_REG(addr); + st->tx[i + 1] = 0; + } + xfers[1].len = count; + + 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) { + + mutex_unlock(&st->buf_lock); + return -EIO; + } + + memcpy(buf, st->rx, count); + + mutex_unlock(&st->buf_lock); + return count; +} + +static ssize_t adis16220_accel_bin_read(struct kobject *kobj, + struct bin_attribute *attr, + char *buf, + loff_t off, + size_t count) +{ + struct device *dev = container_of(kobj, struct device, kobj); + struct iio_dev *indio_dev = dev_get_drvdata(dev); + struct adis16220_state *st = iio_dev_get_devdata(indio_dev); + + return adis16220_capture_buffer_read(st, buf, + off, count, + ADIS16220_CAPT_BUFA); +} + +static ssize_t adis16220_adc1_bin_read(struct kobject *kobj, + struct bin_attribute *attr, + char *buf, loff_t off, + size_t count) +{ + struct device *dev = container_of(kobj, struct device, kobj); + struct iio_dev *indio_dev = dev_get_drvdata(dev); + struct adis16220_state *st = iio_dev_get_devdata(indio_dev); + + return adis16220_capture_buffer_read(st, buf, + off, count, + ADIS16220_CAPT_BUF1); +} + +static ssize_t adis16220_adc2_bin_read(struct kobject *kobj, + struct bin_attribute *attr, + char *buf, loff_t off, + size_t count) +{ + struct device *dev = container_of(kobj, struct device, kobj); + struct iio_dev *indio_dev = dev_get_drvdata(dev); + struct adis16220_state *st = iio_dev_get_devdata(indio_dev); + + return adis16220_capture_buffer_read(st, buf, + off, count, + ADIS16220_CAPT_BUF2); +} + +static IIO_DEV_ATTR_IN_NAMED_RAW(supply, adis16220_read_12bit_unsigned, + ADIS16220_CAPT_SUPPLY); +static IIO_CONST_ATTR(in_supply_scale, "0.0012207"); +static IIO_DEV_ATTR_ACCEL(adis16220_read_16bit, ADIS16220_CAPT_BUFA); +static IIO_DEVICE_ATTR(accel_peak_raw, S_IRUGO, adis16220_read_16bit, + NULL, ADIS16220_CAPT_PEAKA); +static IIO_DEV_ATTR_ACCEL_OFFSET(S_IWUSR | S_IRUGO, + adis16220_read_16bit, + adis16220_write_16bit, + ADIS16220_ACCL_NULL); +static IIO_DEV_ATTR_TEMP_RAW(adis16220_read_12bit_unsigned); +static IIO_CONST_ATTR(temp_offset, "25"); +static IIO_CONST_ATTR(temp_scale, "-0.47"); + +static IIO_DEV_ATTR_IN_RAW(0, adis16220_read_16bit, ADIS16220_CAPT_BUF1); +static IIO_DEV_ATTR_IN_RAW(1, adis16220_read_16bit, ADIS16220_CAPT_BUF2); + +static IIO_DEVICE_ATTR(reset, S_IWUSR, NULL, + adis16220_write_reset, 0); + +#define IIO_DEV_ATTR_CAPTURE(_store) \ + IIO_DEVICE_ATTR(capture, S_IWUGO, NULL, _store, 0) + +static IIO_DEV_ATTR_CAPTURE(adis16220_write_capture); + +#define IIO_DEV_ATTR_CAPTURE_COUNT(_mode, _show, _store, _addr) \ + IIO_DEVICE_ATTR(capture_count, _mode, _show, _store, _addr) + +static IIO_DEV_ATTR_CAPTURE_COUNT(S_IWUSR | S_IRUGO, + adis16220_read_16bit, + adis16220_write_16bit, + ADIS16220_CAPT_PNTR); + +static IIO_CONST_ATTR_AVAIL_SAMP_FREQ("100200"); + +static IIO_CONST_ATTR(name, "adis16220"); + +static struct attribute *adis16220_attributes[] = { + &iio_dev_attr_in_supply_raw.dev_attr.attr, + &iio_const_attr_in_supply_scale.dev_attr.attr, + &iio_dev_attr_accel_raw.dev_attr.attr, + &iio_dev_attr_accel_offset.dev_attr.attr, + &iio_dev_attr_accel_peak_raw.dev_attr.attr, + &iio_dev_attr_temp_raw.dev_attr.attr, + &iio_dev_attr_in0_raw.dev_attr.attr, + &iio_dev_attr_in1_raw.dev_attr.attr, + &iio_const_attr_temp_offset.dev_attr.attr, + &iio_const_attr_temp_scale.dev_attr.attr, + &iio_const_attr_available_sampling_frequency.dev_attr.attr, + &iio_dev_attr_reset.dev_attr.attr, + &iio_dev_attr_capture.dev_attr.attr, + &iio_dev_attr_capture_count.dev_attr.attr, + &iio_const_attr_name.dev_attr.attr, + NULL +}; + +static const struct attribute_group adis16220_attribute_group = { + .attrs = adis16220_attributes, +}; + +static int __devinit adis16220_probe(struct spi_device *spi) +{ + int ret, regdone = 0; + struct adis16220_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)*ADIS16220_MAX_RX, GFP_KERNEL); + if (st->rx == NULL) { + ret = -ENOMEM; + goto error_free_st; + } + st->tx = kzalloc(sizeof(*st->tx)*ADIS16220_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->attrs = &adis16220_attribute_group; + st->indio_dev->dev_data = (void *)(st); + st->indio_dev->driver_module = THIS_MODULE; + st->indio_dev->modes = INDIO_DIRECT_MODE; + + ret = iio_device_register(st->indio_dev); + if (ret) + goto error_free_dev; + regdone = 1; + + st->accel_bin.attr.name = "accel_bin"; + st->accel_bin.attr.mode = S_IRUGO; + st->accel_bin.attr.owner = THIS_MODULE; + st->accel_bin.read = adis16220_accel_bin_read; + st->accel_bin.size = ADIS16220_CAPTURE_SIZE; + + ret = sysfs_create_bin_file(&st->indio_dev->dev.kobj, &st->accel_bin); + if (ret) + goto error_free_dev; + + st->adc1_bin.attr.name = "adc1_bin"; + st->adc1_bin.attr.mode = S_IRUGO; + st->adc1_bin.attr.owner = THIS_MODULE; + st->adc1_bin.read = adis16220_adc1_bin_read; + st->adc1_bin.size = ADIS16220_CAPTURE_SIZE; + + ret = sysfs_create_bin_file(&st->indio_dev->dev.kobj, &st->adc1_bin); + if (ret) + goto error_rm_accel_bin; + + st->adc2_bin.attr.name = "adc2_bin"; + st->adc2_bin.attr.mode = S_IRUGO; + st->adc2_bin.attr.owner = THIS_MODULE; + st->adc2_bin.read = adis16220_adc2_bin_read; + st->adc2_bin.size = ADIS16220_CAPTURE_SIZE; + + ret = sysfs_create_bin_file(&st->indio_dev->dev.kobj, &st->adc2_bin); + if (ret) + goto error_rm_adc1_bin; + + /* Get the device into a sane initial state */ + ret = adis16220_initial_setup(st); + if (ret) + goto error_rm_adc2_bin; + return 0; + +error_rm_adc2_bin: + sysfs_remove_bin_file(&st->indio_dev->dev.kobj, &st->adc2_bin); +error_rm_adc1_bin: + sysfs_remove_bin_file(&st->indio_dev->dev.kobj, &st->adc1_bin); +error_rm_accel_bin: + sysfs_remove_bin_file(&st->indio_dev->dev.kobj, &st->accel_bin); +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 adis16220_remove(struct spi_device *spi) +{ + struct adis16220_state *st = spi_get_drvdata(spi); + struct iio_dev *indio_dev = st->indio_dev; + + flush_scheduled_work(); + + sysfs_remove_bin_file(&st->indio_dev->dev.kobj, &st->adc2_bin); + sysfs_remove_bin_file(&st->indio_dev->dev.kobj, &st->adc1_bin); + sysfs_remove_bin_file(&st->indio_dev->dev.kobj, &st->accel_bin); + iio_device_unregister(indio_dev); + kfree(st->tx); + kfree(st->rx); + kfree(st); + + return 0; +} + +static struct spi_driver adis16220_driver = { + .driver = { + .name = "adis16220", + .owner = THIS_MODULE, + }, + .probe = adis16220_probe, + .remove = __devexit_p(adis16220_remove), +}; + +static __init int adis16220_init(void) +{ + return spi_register_driver(&adis16220_driver); +} +module_init(adis16220_init); + +static __exit void adis16220_exit(void) +{ + spi_unregister_driver(&adis16220_driver); +} +module_exit(adis16220_exit); + +MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>"); +MODULE_DESCRIPTION("Analog Devices ADIS16220 Digital Vibration Sensor"); +MODULE_LICENSE("GPL v2"); -- 1.7.0.3