diff options
| -rw-r--r-- | drivers/staging/iio/accel/Kconfig | 9 | ||||
| -rw-r--r-- | drivers/staging/iio/accel/Makefile | 4 | ||||
| -rw-r--r-- | drivers/staging/iio/accel/adis16240.h | 218 | ||||
| -rw-r--r-- | drivers/staging/iio/accel/adis16240_core.c | 599 | ||||
| -rw-r--r-- | drivers/staging/iio/accel/adis16240_ring.c | 254 | ||||
| -rw-r--r-- | drivers/staging/iio/accel/adis16240_trigger.c | 124 |
6 files changed, 1208 insertions, 0 deletions
diff --git a/drivers/staging/iio/accel/Kconfig b/drivers/staging/iio/accel/Kconfig index 1d89e2153dd2..8f3f70f10a38 100644 --- a/drivers/staging/iio/accel/Kconfig +++ b/drivers/staging/iio/accel/Kconfig @@ -12,6 +12,15 @@ config ADIS16209 Say yes here to build support for Analog Devices adis16209 dual-axis digital inclinometer and accelerometer. +config ADIS16240 + tristate "Analog Devices ADIS16240 Programmable Impact Sensor and Recorder" + 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 adis16240 programmable + impact Sensor and recorder. + config KXSD9 tristate "Kionix KXSD9 Accelerometer Driver" depends on SPI diff --git a/drivers/staging/iio/accel/Makefile b/drivers/staging/iio/accel/Makefile index f8f2124720e7..0e6762c34878 100644 --- a/drivers/staging/iio/accel/Makefile +++ b/drivers/staging/iio/accel/Makefile @@ -5,6 +5,10 @@ adis16209-y := adis16209_core.o adis16209-$(CONFIG_IIO_RING_BUFFER) += adis16209_ring.o adis16209_trigger.o obj-$(CONFIG_ADIS16209) += adis16209.o +adis16240-y := adis16240_core.o +adis16240-$(CONFIG_IIO_RING_BUFFER) += adis16240_ring.o adis16240_trigger.o +obj-$(CONFIG_ADIS16240) += adis16240.o + obj-$(CONFIG_KXSD9) += kxsd9.o lis3l02dq-y := lis3l02dq_core.o diff --git a/drivers/staging/iio/accel/adis16240.h b/drivers/staging/iio/accel/adis16240.h new file mode 100644 index 000000000000..dcff43c75235 --- /dev/null +++ b/drivers/staging/iio/accel/adis16240.h @@ -0,0 +1,218 @@ +#ifndef SPI_ADIS16240_H_ +#define SPI_ADIS16240_H_ + +#define ADIS16240_STARTUP_DELAY 220 /* ms */ + +#define ADIS16240_READ_REG(a) a +#define ADIS16240_WRITE_REG(a) ((a) | 0x80) + +/* Flash memory write count */ +#define ADIS16240_FLASH_CNT 0x00 +/* Output, power supply */ +#define ADIS16240_SUPPLY_OUT 0x02 +/* Output, x-axis accelerometer */ +#define ADIS16240_XACCL_OUT 0x04 +/* Output, y-axis accelerometer */ +#define ADIS16240_YACCL_OUT 0x06 +/* Output, z-axis accelerometer */ +#define ADIS16240_ZACCL_OUT 0x08 +/* Output, auxiliary ADC input */ +#define ADIS16240_AUX_ADC 0x0A +/* Output, temperature */ +#define ADIS16240_TEMP_OUT 0x0C +/* Output, x-axis acceleration peak */ +#define ADIS16240_XPEAK_OUT 0x0E +/* Output, y-axis acceleration peak */ +#define ADIS16240_YPEAK_OUT 0x10 +/* Output, z-axis acceleration peak */ +#define ADIS16240_ZPEAK_OUT 0x12 +/* Output, sum-of-squares acceleration peak */ +#define ADIS16240_XYZPEAK_OUT 0x14 +/* Output, Capture Buffer 1, X and Y acceleration */ +#define ADIS16240_CAPT_BUF1 0x16 +/* Output, Capture Buffer 2, Z acceleration */ +#define ADIS16240_CAPT_BUF2 0x18 +/* Diagnostic, error flags */ +#define ADIS16240_DIAG_STAT 0x1A +/* Diagnostic, event counter */ +#define ADIS16240_EVNT_CNTR 0x1C +/* Diagnostic, check sum value from firmware test */ +#define ADIS16240_CHK_SUM 0x1E +/* Calibration, x-axis acceleration offset adjustment */ +#define ADIS16240_XACCL_OFF 0x20 +/* Calibration, y-axis acceleration offset adjustment */ +#define ADIS16240_YACCL_OFF 0x22 +/* Calibration, z-axis acceleration offset adjustment */ +#define ADIS16240_ZACCL_OFF 0x24 +/* Clock, hour and minute */ +#define ADIS16240_CLK_TIME 0x2E +/* Clock, month and day */ +#define ADIS16240_CLK_DATE 0x30 +/* Clock, year */ +#define ADIS16240_CLK_YEAR 0x32 +/* Wake-up setting, hour and minute */ +#define ADIS16240_WAKE_TIME 0x34 +/* Wake-up setting, month and day */ +#define ADIS16240_WAKE_DATE 0x36 +/* Alarm 1 amplitude threshold */ +#define ADIS16240_ALM_MAG1 0x38 +/* Alarm 2 amplitude threshold */ +#define ADIS16240_ALM_MAG2 0x3A +/* Alarm control */ +#define ADIS16240_ALM_CTRL 0x3C +/* Capture, external trigger control */ +#define ADIS16240_XTRIG_CTRL 0x3E +/* Capture, address pointer */ +#define ADIS16240_CAPT_PNTR 0x40 +/* Capture, configuration and control */ +#define ADIS16240_CAPT_CTRL 0x42 +/* General-purpose digital input/output control */ +#define ADIS16240_GPIO_CTRL 0x44 +/* Miscellaneous control */ +#define ADIS16240_MSC_CTRL 0x46 +/* Internal sample period (rate) control */ +#define ADIS16240_SMPL_PRD 0x48 +/* System command */ +#define ADIS16240_GLOB_CMD 0x4A + +#define ADIS16240_OUTPUTS 6 + +/* MSC_CTRL */ +/* Enables sum-of-squares output (XYZPEAK_OUT) */ +#define ADIS16240_MSC_CTRL_XYZPEAK_OUT_EN (1 << 15) +/* Enables peak tracking output (XPEAK_OUT, YPEAK_OUT, and ZPEAK_OUT) */ +#define ADIS16240_MSC_CTRL_X_Y_ZPEAK_OUT_EN (1 << 14) +/* Self-test enable: 1 = apply electrostatic force, 0 = disabled */ +#define ADIS16240_MSC_CTRL_SELF_TEST_EN (1 << 8) +/* Data-ready enable: 1 = enabled, 0 = disabled */ +#define ADIS16240_MSC_CTRL_DATA_RDY_EN (1 << 2) +/* Data-ready polarity: 1 = active high, 0 = active low */ +#define ADIS16240_MSC_CTRL_ACTIVE_HIGH (1 << 1) +/* Data-ready line selection: 1 = DIO2, 0 = DIO1 */ +#define ADIS16240_MSC_CTRL_DATA_RDY_DIO2 (1 << 0) + +/* DIAG_STAT */ +/* Alarm 2 status: 1 = alarm active, 0 = alarm inactive */ +#define ADIS16240_DIAG_STAT_ALARM2 (1<<9) +/* Alarm 1 status: 1 = alarm active, 0 = alarm inactive */ +#define ADIS16240_DIAG_STAT_ALARM1 (1<<8) +/* Capture buffer full: 1 = capture buffer is full */ +#define ADIS16240_DIAG_STAT_CPT_BUF_FUL (1<<7) +/* Flash test, checksum flag: 1 = mismatch, 0 = match */ +#define ADIS16240_DIAG_STAT_CHKSUM (1<<6) +/* Power-on, self-test flag: 1 = failure, 0 = pass */ +#define ADIS16240_DIAG_STAT_PWRON_FAIL (1<<5) +/* Power-on self-test: 1 = in-progress, 0 = complete */ +#define ADIS16240_DIAG_STAT_PWRON_BUSY (1<<4) +/* SPI communications failure */ +#define ADIS16240_DIAG_STAT_SPI_FAIL (1<<3) +/* Flash update failure */ +#define ADIS16240_DIAG_STAT_FLASH_UPT (1<<2) +/* Power supply above 3.625 V */ +#define ADIS16240_DIAG_STAT_POWER_HIGH (1<<1) + /* Power supply below 3.15 V */ +#define ADIS16240_DIAG_STAT_POWER_LOW (1<<0) + +/* GLOB_CMD */ +#define ADIS16240_GLOB_CMD_RESUME (1<<8) +#define ADIS16240_GLOB_CMD_SW_RESET (1<<7) +#define ADIS16240_GLOB_CMD_STANDBY (1<<2) + +#define ADIS16240_ERROR_ACTIVE (1<<14) + +#define ADIS16240_MAX_TX 24 +#define ADIS16240_MAX_RX 24 + +/** + * struct adis16240_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 adis16240_state { + struct spi_device *us; + struct work_struct work_trigger_to_ring; + struct iio_work_cont work_cont_thresh; + s64 last_timestamp; + struct iio_dev *indio_dev; + struct iio_trigger *trig; + u8 *tx; + u8 *rx; + struct mutex buf_lock; +}; + +int adis16240_set_irq(struct device *dev, bool enable); + +#ifdef CONFIG_IIO_RING_BUFFER +/* At the moment triggers are only used for ring buffer + * filling. This may change! + */ + +enum adis16240_scan { + ADIS16240_SCAN_SUPPLY, + ADIS16240_SCAN_ACC_X, + ADIS16240_SCAN_ACC_Y, + ADIS16240_SCAN_ACC_Z, + ADIS16240_SCAN_AUX_ADC, + ADIS16240_SCAN_TEMP, +}; + +void adis16240_remove_trigger(struct iio_dev *indio_dev); +int adis16240_probe_trigger(struct iio_dev *indio_dev); + +ssize_t adis16240_read_data_from_ring(struct device *dev, + struct device_attribute *attr, + char *buf); + + +int adis16240_configure_ring(struct iio_dev *indio_dev); +void adis16240_unconfigure_ring(struct iio_dev *indio_dev); + +int adis16240_initialize_ring(struct iio_ring_buffer *ring); +void adis16240_uninitialize_ring(struct iio_ring_buffer *ring); +#else /* CONFIG_IIO_RING_BUFFER */ + +static inline void adis16240_remove_trigger(struct iio_dev *indio_dev) +{ +} + +static inline int adis16240_probe_trigger(struct iio_dev *indio_dev) +{ + return 0; +} + +static inline ssize_t +adis16240_read_data_from_ring(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + return 0; +} + +static int adis16240_configure_ring(struct iio_dev *indio_dev) +{ + return 0; +} + +static inline void adis16240_unconfigure_ring(struct iio_dev *indio_dev) +{ +} + +static inline int adis16240_initialize_ring(struct iio_ring_buffer *ring) +{ + return 0; +} + +static inline void adis16240_uninitialize_ring(struct iio_ring_buffer *ring) +{ +} + +#endif /* CONFIG_IIO_RING_BUFFER */ +#endif /* SPI_ADIS16240_H_ */ diff --git a/drivers/staging/iio/accel/adis16240_core.c b/drivers/staging/iio/accel/adis16240_core.c new file mode 100644 index 000000000000..54fd6d77412f --- /dev/null +++ b/drivers/staging/iio/accel/adis16240_core.c @@ -0,0 +1,599 @@ +/* + * ADIS16240 Programmable Impact Sensor and Recorder 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/sysfs.h> +#include <linux/list.h> + +#include "../iio.h" +#include "../sysfs.h" +#include "accel.h" +#include "../adc/adc.h" + +#include "adis16240.h" + +#define DRIVER_NAME "adis16240" + +static int adis16240_check_status(struct device *dev); + +/** + * adis16240_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 adis16240_spi_write_reg_8(struct device *dev, + u8 reg_address, + u8 val) +{ + int ret; + struct iio_dev *indio_dev = dev_get_drvdata(dev); + struct adis16240_state *st = iio_dev_get_devdata(indio_dev); + + mutex_lock(&st->buf_lock); + st->tx[0] = ADIS16240_WRITE_REG(reg_address); + st->tx[1] = val; + + ret = spi_write(st->us, st->tx, 2); + mutex_unlock(&st->buf_lock); + + return ret; +} + +/** + * adis16240_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 adis16240_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 adis16240_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] = ADIS16240_WRITE_REG(lower_reg_address); + st->tx[1] = value & 0xFF; + st->tx[2] = ADIS16240_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; +} + +/** + * adis16240_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 adis16240_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 adis16240_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] = ADIS16240_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 adis16240_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 = adis16240_spi_read_reg_16(dev, this_attr->address, (u16 *)&val); + if (ret) + return ret; + + if (val & ADIS16240_ERROR_ACTIVE) + adis16240_check_status(dev); + + val = ((s16)(val << shift) >> shift); + return sprintf(buf, "%d\n", val); +} + +static ssize_t adis16240_read_10bit_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 = adis16240_spi_read_reg_16(dev, this_attr->address, &val); + if (ret) + return ret; + + if (val & ADIS16240_ERROR_ACTIVE) + adis16240_check_status(dev); + + return sprintf(buf, "%u\n", val & 0x03FF); +} + +static ssize_t adis16240_read_10bit_signed(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 = adis16240_spi_read_signed(dev, attr, buf, 10); + mutex_unlock(&indio_dev->mlock); + + return ret; +} + +static ssize_t adis16240_read_12bit_signed(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 = adis16240_spi_read_signed(dev, attr, buf, 12); + mutex_unlock(&indio_dev->mlock); + + return ret; +} + +static ssize_t adis16240_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 = adis16240_spi_write_reg_16(dev, this_attr->address, val); + +error_ret: + return ret ? ret : len; +} + +static int adis16240_reset(struct device *dev) +{ + int ret; + ret = adis16240_spi_write_reg_8(dev, + ADIS16240_GLOB_CMD, + ADIS16240_GLOB_CMD_SW_RESET); + if (ret) + dev_err(dev, "problem resetting device"); + + return ret; +} + +static ssize_t adis16240_write_reset(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t len) +{ + if (len < 1) + return -EINVAL; + switch (buf[0]) { + case '1': + case 'y': + case 'Y': + return adis16240_reset(dev); + } + return -EINVAL; +} + +int adis16240_set_irq(struct device *dev, bool enable) +{ + int ret = 0; + u16 msc; + + ret = adis16240_spi_read_reg_16(dev, ADIS16240_MSC_CTRL, &msc); + if (ret) + goto error_ret; + + msc |= ADIS16240_MSC_CTRL_ACTIVE_HIGH; + msc &= ~ADIS16240_MSC_CTRL_DATA_RDY_DIO2; + if (enable) + msc |= ADIS16240_MSC_CTRL_DATA_RDY_EN; + else + msc &= ~ADIS16240_MSC_CTRL_DATA_RDY_EN; + + ret = adis16240_spi_write_reg_16(dev, ADIS16240_MSC_CTRL, msc); + +error_ret: + return ret; +} + +static int adis16240_self_test(struct device *dev) +{ + int ret; + ret = adis16240_spi_write_reg_16(dev, + ADIS16240_MSC_CTRL, + ADIS16240_MSC_CTRL_SELF_TEST_EN); + if (ret) { + dev_err(dev, "problem starting self test"); + goto err_ret; + } + + msleep(ADIS16240_STARTUP_DELAY); + + adis16240_check_status(dev); + +err_ret: + return ret; +} + +static int adis16240_check_status(struct device *dev) +{ + u16 status; + int ret; + + ret = adis16240_spi_read_reg_16(dev, ADIS16240_DIAG_STAT, &status); + + if (ret < 0) { + dev_err(dev, "Reading status failed\n"); + goto error_ret; + } + + ret = status & 0x2F; + if (status & ADIS16240_DIAG_STAT_PWRON_FAIL) + dev_err(dev, "Power-on, self-test fail\n"); + if (status & ADIS16240_DIAG_STAT_SPI_FAIL) + dev_err(dev, "SPI failure\n"); + if (status & ADIS16240_DIAG_STAT_FLASH_UPT) + dev_err(dev, "Flash update failed\n"); + if (status & ADIS16240_DIAG_STAT_POWER_HIGH) + dev_err(dev, "Power supply above 3.625V\n"); + if (status & ADIS16240_DIAG_STAT_POWER_LOW) + dev_err(dev, "Power supply below 2.225V\n"); + +error_ret: + return ret; +} + +static int adis16240_initial_setup(struct adis16240_state *st) +{ + int ret; + struct device *dev = &st->indio_dev->dev; + + /* Disable IRQ */ + ret = adis16240_set_irq(dev, false); + if (ret) { + dev_err(dev, "disable irq failed"); + goto err_ret; + } + + /* Do self test */ + ret = adis16240_self_test(dev); + if (ret) { + dev_err(dev, "self test failure"); + goto err_ret; + } + + /* Read status register to check the result */ + ret = adis16240_check_status(dev); + if (ret) { + adis16240_reset(dev); + dev_err(dev, "device not playing ball -> reset"); + msleep(ADIS16240_STARTUP_DELAY); + ret = adis16240_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 IIO_DEV_ATTR_IN_NAMED_RAW(supply, adis16240_read_10bit_unsigned, + ADIS16240_SUPPLY_OUT); +static IIO_DEV_ATTR_IN_RAW(0, adis16240_read_10bit_signed, + ADIS16240_AUX_ADC); +static IIO_CONST_ATTR(in_supply_scale, "0.00488"); +static IIO_DEV_ATTR_ACCEL_X(adis16240_read_10bit_signed, + ADIS16240_XACCL_OUT); +static IIO_DEVICE_ATTR(accel_x_peak_raw, S_IRUGO, + adis16240_read_10bit_signed, NULL, + ADIS16240_XPEAK_OUT); +static IIO_DEV_ATTR_ACCEL_Y(adis16240_read_10bit_signed, + ADIS16240_YACCL_OUT); +static IIO_DEVICE_ATTR(accel_y_peak_raw, S_IRUGO, + adis16240_read_10bit_signed, NULL, + ADIS16240_YPEAK_OUT); +static IIO_DEV_ATTR_ACCEL_Z(adis16240_read_10bit_signed, + ADIS16240_ZACCL_OUT); +static IIO_DEVICE_ATTR(accel_z_peak_raw, S_IRUGO, + adis16240_read_10bit_signed, NULL, + ADIS16240_ZPEAK_OUT); + +static IIO_DEVICE_ATTR(accel_xyz_squared_peak_raw, S_IRUGO, + adis16240_read_12bit_signed, NULL, + ADIS16240_XYZPEAK_OUT); +static IIO_DEV_ATTR_ACCEL_X_OFFSET(S_IWUSR | S_IRUGO, + adis16240_read_10bit_signed, + adis16240_write_16bit, + ADIS16240_XACCL_OFF); +static IIO_DEV_ATTR_ACCEL_Y_OFFSET(S_IWUSR | S_IRUGO, + adis16240_read_10bit_signed, + adis16240_write_16bit, + ADIS16240_YACCL_OFF); +static IIO_DEV_ATTR_ACCEL_Z_OFFSET(S_IWUSR | S_IRUGO, + adis16240_read_10bit_signed, + adis16240_write_16bit, + ADIS16240_ZACCL_OFF); +static IIO_DEV_ATTR_TEMP_RAW(adis16240_read_10bit_unsigned); +static IIO_CONST_ATTR(temp_scale, "0.244"); + +static IIO_DEVICE_ATTR(reset, S_IWUSR, NULL, adis16240_write_reset, 0); + +static IIO_CONST_ATTR_AVAIL_SAMP_FREQ("4096"); + +static IIO_CONST_ATTR(name, "adis16240"); + +static struct attribute *adis16240_event_attributes[] = { + NULL +}; + +static struct attribute_group adis16240_event_attribute_group = { + .attrs = adis16240_event_attributes, +}; + +static struct attribute *adis16240_attributes[] = { + &iio_dev_attr_in_supply_raw.dev_attr.attr, + &iio_const_attr_in_supply_scale.dev_attr.attr, + &iio_dev_attr_in0_raw.dev_attr.attr, + &iio_dev_attr_accel_x_raw.dev_attr.attr, + &iio_dev_attr_accel_x_offset.dev_attr.attr, + &iio_dev_attr_accel_x_peak_raw.dev_attr.attr, + &iio_dev_attr_accel_y_raw.dev_attr.attr, + &iio_dev_attr_accel_y_offset.dev_attr.attr, + &iio_dev_attr_accel_y_peak_raw.dev_attr.attr, + &iio_dev_attr_accel_z_raw.dev_attr.attr, + &iio_dev_attr_accel_z_offset.dev_attr.attr, + &iio_dev_attr_accel_z_peak_raw.dev_attr.attr, + &iio_dev_attr_accel_xyz_squared_peak_raw.dev_attr.attr, + &iio_dev_attr_temp_raw.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_const_attr_name.dev_attr.attr, + NULL +}; + +static const struct attribute_group adis16240_attribute_group = { + .attrs = adis16240_attributes, +}; + +static int __devinit adis16240_probe(struct spi_device *spi) +{ + int ret, regdone = 0; + struct adis16240_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)*ADIS16240_MAX_RX, GFP_KERNEL); + if (st->rx == NULL) { + ret = -ENOMEM; + goto error_free_st; + } + st->tx = kzalloc(sizeof(*st->tx)*ADIS16240_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 = &adis16240_event_attribute_group; + st->indio_dev->attrs = &adis16240_attribute_group; + st->indio_dev->dev_data = (void *)(st); + st->indio_dev->driver_module = THIS_MODULE; + st->indio_dev->modes = INDIO_DIRECT_MODE; + + ret = adis16240_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 = adis16240_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_RISING, + "adis16240"); + if (ret) + goto error_uninitialize_ring; + + ret = adis16240_probe_trigger(st->indio_dev); + if (ret) + goto error_unregister_line; + } + + /* Get the device into a sane initial state */ + ret = adis16240_initial_setup(st); + if (ret) + goto error_remove_trigger; + return 0; + +error_remove_trigger: + adis16240_remove_trigger(st->indio_dev); +error_unregister_line: + if (spi->irq) + iio_unregister_interrupt_line(st->indio_dev, 0); +error_uninitialize_ring: + adis16240_uninitialize_ring(st->indio_dev->ring); +error_unreg_ring_funcs: + adis16240_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 adis16240_remove(struct spi_device *spi) +{ + struct adis16240_state *st = spi_get_drvdata(spi); + struct iio_dev *indio_dev = st->indio_dev; + + flush_scheduled_work(); + + adis16240_remove_trigger(indio_dev); + if (spi->irq) + iio_unregister_interrupt_line(indio_dev, 0); + + adis16240_uninitialize_ring(indio_dev->ring); + iio_device_unregister(indio_dev); + adis16240_unconfigure_ring(indio_dev); + kfree(st->tx); + kfree(st->rx); + kfree(st); + + return 0; +} + +static struct spi_driver adis16240_driver = { + .driver = { + .name = "adis16240", + .owner = THIS_MODULE, + }, + .probe = adis16240_probe, + .remove = __devexit_p(adis16240_remove), +}; + +static __init int adis16240_init(void) +{ + return spi_register_driver(&adis16240_driver); +} +module_init(adis16240_init); + +static __exit void adis16240_exit(void) +{ + spi_unregister_driver(&adis16240_driver); +} +module_exit(adis16240_exit); + +MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>"); +MODULE_DESCRIPTION("Analog Devices Programmable Impact Sensor and Recorder"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/staging/iio/accel/adis16240_ring.c b/drivers/staging/iio/accel/adis16240_ring.c new file mode 100644 index 000000000000..26b677bd84c0 --- /dev/null +++ b/drivers/staging/iio/accel/adis16240_ring.c @@ -0,0 +1,254 @@ +#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/sysfs.h> +#include <linux/list.h> + +#include "../iio.h" +#include "../sysfs.h" +#include "../ring_sw.h" +#include "accel.h" +#include "../trigger.h" +#include "adis16240.h" + +/** + * combine_8_to_16() utility function to munge to u8s into u16 + **/ +static inline u16 combine_8_to_16(u8 lower, u8 upper) +{ + u16 _lower = lower; + u16 _upper = upper; + return _lower | (_upper << 8); +} + +static IIO_SCAN_EL_C(supply, ADIS16240_SCAN_SUPPLY, IIO_UNSIGNED(10), + ADIS16240_SUPPLY_OUT, NULL); +static IIO_SCAN_EL_C(accel_x, ADIS16240_SCAN_ACC_X, IIO_SIGNED(10), + ADIS16240_XACCL_OUT, NULL); +static IIO_SCAN_EL_C(accel_y, ADIS16240_SCAN_ACC_Y, IIO_SIGNED(10), + ADIS16240_YACCL_OUT, NULL); +static IIO_SCAN_EL_C(accel_z, ADIS16240_SCAN_ACC_Z, IIO_SIGNED(10), + ADIS16240_ZACCL_OUT, NULL); +static IIO_SCAN_EL_C(aux_adc, ADIS16240_SCAN_AUX_ADC, IIO_UNSIGNED(10), + ADIS16240_AUX_ADC, NULL); +static IIO_SCAN_EL_C(temp, ADIS16240_SCAN_TEMP, IIO_UNSIGNED(10), + ADIS16240_TEMP_OUT, NULL); + +static IIO_SCAN_EL_TIMESTAMP(6); + +static struct attribute *adis16240_scan_el_attrs[] = { + &iio_scan_el_supply.dev_attr.attr, + &iio_scan_el_accel_x.dev_attr.attr, + &iio_scan_el_accel_y.dev_attr.attr, + &iio_scan_el_accel_z.dev_attr.attr, + &iio_scan_el_aux_adc.dev_attr.attr, + &iio_scan_el_temp.dev_attr.attr, + &iio_scan_el_timestamp.dev_attr.attr, + NULL, +}; + +static struct attribute_group adis16240_scan_el_group = { + .attrs = adis16240_scan_el_attrs, + .name = "scan_elements", +}; + +/** + * adis16240_poll_func_th() top half interrupt handler called by trigger + * @private_data: iio_dev + **/ +static void adis16240_poll_func_th(struct iio_dev *indio_dev) +{ + struct adis16240_state *st = iio_dev_get_devdata(indio_dev); + st->last_timestamp = indio_dev->trig->timestamp; + schedule_work(&st->work_trigger_to_ring); +} + +/** + * adis16240_read_ring_data() read data registers which will be placed into ring + * @dev: device associated with child of actual device (iio_dev or iio_trig) + * @rx: somewhere to pass back the value read + **/ +static int adis16240_read_ring_data(struct device *dev, u8 *rx) +{ + struct spi_message msg; + struct iio_dev *indio_dev = dev_get_drvdata(dev); + struct adis16240_state *st = iio_dev_get_devdata(indio_dev); + struct spi_transfer xfers[ADIS16240_OUTPUTS + 1]; + int ret; + int i; + + mutex_lock(&st->buf_lock); + + spi_message_init(&msg); + + memset(xfers, 0, sizeof(xfers)); + for (i = 0; i <= ADIS16240_OUTPUTS; i++) { + xfers[i].bits_per_word = 8; + xfers[i].cs_change = 1; + xfers[i].len = 2; + xfers[i].delay_usecs = 30; + xfers[i].tx_buf = st->tx + 2 * i; + st->tx[2 * i] + = ADIS16240_READ_REG(ADIS16240_SUPPLY_OUT + 2 * i); + st->tx[2 * i + 1] = 0; + if (i >= 1) + xfers[i].rx_buf = rx + 2 * (i - 1); + spi_message_add_tail(&xfers[i], &msg); + } + + ret = spi_sync(st->us, &msg); + if (ret) + dev_err(&st->us->dev, "problem when burst reading"); + + mutex_unlock(&st->buf_lock); + + return ret; +} + + +static void adis16240_trigger_bh_to_ring(struct work_struct *work_s) +{ + struct adis16240_state *st + = container_of(work_s, struct adis16240_state, + work_trigger_to_ring); + + int i = 0; + s16 *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 (adis16240_read_ring_data(&st->indio_dev->dev, st->rx) >= 0) + for (; i < st->indio_dev->scan_count; i++) { + data[i] = combine_8_to_16(st->rx[i*2+1], + st->rx[i*2]); + } + + /* Guaranteed to be aligned with 8 byte boundary */ + if (st->indio_dev->scan_timestamp) + *((s64 *)(data + ((i + 3)/4)*4)) = 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; +} + +static int adis16240_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 (aligned sizeof(s64) and data */ + size = (((indio_dev->scan_count * sizeof(s16)) + + sizeof(s64) - 1) + & ~(sizeof(s64) - 1)) + + sizeof(s64); + else /* Timestamp only */ + size = sizeof(s64); + else /* Data only */ + size = indio_dev->scan_count*sizeof(s16); + indio_dev->ring->access.set_bpd(indio_dev->ring, size); + } + + return 0; +} + +static int adis16240_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 adis16240_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 adis16240_unconfigure_ring(struct iio_dev *indio_dev) +{ + kfree(indio_dev->pollfunc); + iio_sw_rb_free(indio_dev->ring); +} + +int adis16240_configure_ring(struct iio_dev *indio_dev) +{ + int ret = 0; + struct adis16240_state *st = indio_dev->dev_data; + struct iio_ring_buffer *ring; + INIT_WORK(&st->work_trigger_to_ring, adis16240_trigger_bh_to_ring); + /* Set default scan mode */ + + iio_scan_mask_set(indio_dev, iio_scan_el_supply.number); + iio_scan_mask_set(indio_dev, iio_scan_el_accel_x.number); + iio_scan_mask_set(indio_dev, iio_scan_el_accel_y.number); + iio_scan_mask_set(indio_dev, iio_scan_el_accel_z.number); + iio_scan_mask_set(indio_dev, iio_scan_el_temp.number); + iio_scan_mask_set(indio_dev, iio_scan_el_aux_adc.number); + indio_dev->scan_timestamp = true; + + indio_dev->scan_el_attrs = &adis16240_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 = &adis16240_data_rdy_ring_preenable; + ring->postenable = &adis16240_data_rdy_ring_postenable; + ring->predisable = &adis16240_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 = &adis16240_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 adis16240_initialize_ring(struct iio_ring_buffer *ring) +{ + return iio_ring_buffer_register(ring, 0); +} + +void adis16240_uninitialize_ring(struct iio_ring_buffer *ring) +{ + iio_ring_buffer_unregister(ring); +} diff --git a/drivers/staging/iio/accel/adis16240_trigger.c b/drivers/staging/iio/accel/adis16240_trigger.c new file mode 100644 index 000000000000..df1312e17f4b --- /dev/null +++ b/drivers/staging/iio/accel/adis16240_trigger.c @@ -0,0 +1,124 @@ +#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 "adis16240.h" + +/** + * adis16240_data_rdy_trig_poll() the event handler for the data rdy trig + **/ +static int adis16240_data_rdy_trig_poll(struct iio_dev *dev_info, + int index, + s64 timestamp, + int no_test) +{ + struct adis16240_state *st = iio_dev_get_devdata(dev_info); + struct iio_trigger *trig = st->trig; + + trig->timestamp = timestamp; + iio_trigger_poll(trig); + + return IRQ_HANDLED; +} + +IIO_EVENT_SH(data_rdy_trig, &adis16240_data_rdy_trig_poll); + +static DEVICE_ATTR(name, S_IRUGO, iio_trigger_read_name, NULL); + +static struct attribute *adis16240_trigger_attrs[] = { + &dev_attr_name.attr, + NULL, +}; + +static const struct attribute_group adis16240_trigger_attr_group = { + .attrs = adis16240_trigger_attrs, +}; + +/** + * adis16240_data_rdy_trigger_set_state() set datardy interrupt state + **/ +static int adis16240_data_rdy_trigger_set_state(struct iio_trigger *trig, + bool state) +{ + struct adis16240_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 = adis16240_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); + flush_scheduled_work(); + } else { + iio_add_event_to_list(&iio_event_data_rdy_trig, + &indio_dev->interrupts[0]->ev_list); + } + return ret; +} + +/** + * adis16240_trig_try_reen() try renabling irq for data rdy trigger + * @trig: the datardy trigger + **/ +static int adis16240_trig_try_reen(struct iio_trigger *trig) +{ + struct adis16240_state *st = trig->private_data; + enable_irq(st->us->irq); + return 0; +} + +int adis16240_probe_trigger(struct iio_dev *indio_dev) +{ + int ret; + struct adis16240_state *st = indio_dev->dev_data; + + st->trig = iio_allocate_trigger(); + st->trig->name = kmalloc(IIO_TRIGGER_NAME_LENGTH, GFP_KERNEL); + if (!st->trig->name) { + ret = -ENOMEM; + goto error_free_trig; + } + snprintf((char *)st->trig->name, + IIO_TRIGGER_NAME_LENGTH, + "adis16240-dev%d", indio_dev->id); + st->trig->dev.parent = &st->us->dev; + st->trig->owner = THIS_MODULE; + st->trig->private_data = st; + st->trig->set_trigger_state = &adis16240_data_rdy_trigger_set_state; + st->trig->try_reenable = &adis16240_trig_try_reen; + st->trig->control_attrs = &adis16240_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 adis16240_remove_trigger(struct iio_dev *indio_dev) +{ + struct adis16240_state *state = indio_dev->dev_data; + + iio_trigger_unregister(state->trig); + kfree(state->trig->name); + iio_free_trigger(state->trig); +} |