--- /dev/null
+/*
+ * cros_ec_sensors_core - Common function for Chrome OS EC sensor driver.
+ *
+ * Copyright (C) 2016 Google, Inc
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/iio/buffer.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/kfifo_buf.h>
+#include <linux/iio/trigger_consumer.h>
+#include <linux/kernel.h>
+#include <linux/mfd/cros_ec.h>
+#include <linux/mfd/cros_ec_commands.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/sysfs.h>
+#include <linux/platform_device.h>
+
+#include "cros_ec_sensors_core.h"
+
+static char *cros_ec_loc[] = {
+ [MOTIONSENSE_LOC_BASE] = "base",
+ [MOTIONSENSE_LOC_LID] = "lid",
+ [MOTIONSENSE_LOC_MAX] = "unknown",
+};
+
+int cros_ec_sensors_core_init(struct platform_device *pdev,
+ struct iio_dev *indio_dev,
+ bool physical_device)
+{
+ struct device *dev = &pdev->dev;
+ struct cros_ec_sensors_core_state *state = iio_priv(indio_dev);
+ struct cros_ec_dev *ec = dev_get_drvdata(pdev->dev.parent);
+ struct cros_ec_sensor_platform *sensor_platform = dev_get_platdata(dev);
+
+ platform_set_drvdata(pdev, indio_dev);
+
+ state->ec = ec->ec_dev;
+ state->msg = devm_kzalloc(&pdev->dev,
+ max((u16)sizeof(struct ec_params_motion_sense),
+ state->ec->max_response), GFP_KERNEL);
+ if (!state->msg)
+ return -ENOMEM;
+
+ state->resp = (struct ec_response_motion_sense *)state->msg->data;
+
+ mutex_init(&state->cmd_lock);
+
+ /* Set up the host command structure. */
+ state->msg->version = 2;
+ state->msg->command = EC_CMD_MOTION_SENSE_CMD + ec->cmd_offset;
+ state->msg->outsize = sizeof(struct ec_params_motion_sense);
+
+ indio_dev->dev.parent = &pdev->dev;
+ indio_dev->name = pdev->name;
+
+ if (physical_device) {
+ indio_dev->modes = INDIO_DIRECT_MODE;
+
+ state->param.cmd = MOTIONSENSE_CMD_INFO;
+ state->param.info.sensor_num = sensor_platform->sensor_num;
+ if (cros_ec_motion_send_host_cmd(state, 0)) {
+ dev_warn(dev, "Can not access sensor info\n");
+ return -EIO;
+ }
+ state->type = state->resp->info.type;
+ state->loc = state->resp->info.location;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(cros_ec_sensors_core_init);
+
+int cros_ec_motion_send_host_cmd(struct cros_ec_sensors_core_state *state,
+ u16 opt_length)
+{
+ int ret;
+
+ if (opt_length)
+ state->msg->insize = min(opt_length, state->ec->max_response);
+ else
+ state->msg->insize = state->ec->max_response;
+
+ memcpy(state->msg->data, &state->param, sizeof(state->param));
+
+ ret = cros_ec_cmd_xfer_status(state->ec, state->msg);
+ if (ret < 0)
+ return -EIO;
+
+ if (ret &&
+ state->resp != (struct ec_response_motion_sense *)state->msg->data)
+ memcpy(state->resp, state->msg->data, ret);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(cros_ec_motion_send_host_cmd);
+
+static ssize_t cros_ec_sensors_calibrate(struct iio_dev *indio_dev,
+ uintptr_t private, const struct iio_chan_spec *chan,
+ const char *buf, size_t len)
+{
+ struct cros_ec_sensors_core_state *st = iio_priv(indio_dev);
+ int ret, i;
+ bool calibrate;
+
+ ret = strtobool(buf, &calibrate);
+ if (ret < 0)
+ return ret;
+ if (!calibrate)
+ return -EINVAL;
+
+ mutex_lock(&st->cmd_lock);
+ st->param.cmd = MOTIONSENSE_CMD_PERFORM_CALIB;
+ ret = cros_ec_motion_send_host_cmd(st, 0);
+ if (ret != 0) {
+ dev_warn(&indio_dev->dev, "Unable to calibrate sensor\n");
+ } else {
+ /* Save values */
+ for (i = CROS_EC_SENSOR_X; i < CROS_EC_SENSOR_MAX_AXIS; i++)
+ st->calib[i] = st->resp->perform_calib.offset[i];
+ }
+ mutex_unlock(&st->cmd_lock);
+
+ return ret ? ret : len;
+}
+
+static ssize_t cros_ec_sensors_loc(struct iio_dev *indio_dev,
+ uintptr_t private, const struct iio_chan_spec *chan,
+ char *buf)
+{
+ struct cros_ec_sensors_core_state *st = iio_priv(indio_dev);
+
+ return snprintf(buf, PAGE_SIZE, "%s\n", cros_ec_loc[st->loc]);
+}
+
+const struct iio_chan_spec_ext_info cros_ec_sensors_ext_info[] = {
+ {
+ .name = "calibrate",
+ .shared = IIO_SHARED_BY_ALL,
+ .write = cros_ec_sensors_calibrate
+ },
+ {
+ .name = "location",
+ .shared = IIO_SHARED_BY_ALL,
+ .read = cros_ec_sensors_loc
+ },
+ { },
+};
+EXPORT_SYMBOL_GPL(cros_ec_sensors_ext_info);
+
+/**
+ * cros_ec_sensors_idx_to_reg - convert index into offset in shared memory
+ * @st: pointer to state information for device
+ * @idx: sensor index (should be element of enum sensor_index)
+ *
+ * Return: address to read at
+ */
+static unsigned int cros_ec_sensors_idx_to_reg(
+ struct cros_ec_sensors_core_state *st,
+ unsigned int idx)
+{
+ /*
+ * When using LPC interface, only space for 2 Accel and one Gyro.
+ * First halfword of MOTIONSENSE_TYPE_ACCEL is used by angle.
+ */
+ if (st->type == MOTIONSENSE_TYPE_ACCEL)
+ return EC_MEMMAP_ACC_DATA + sizeof(u16) *
+ (1 + idx + st->param.info.sensor_num *
+ CROS_EC_SENSOR_MAX_AXIS);
+
+ return EC_MEMMAP_GYRO_DATA + sizeof(u16) * idx;
+}
+
+static int cros_ec_sensors_cmd_read_u8(struct cros_ec_device *ec,
+ unsigned int offset, u8 *dest)
+{
+ return ec->cmd_readmem(ec, offset, 1, dest);
+}
+
+static int cros_ec_sensors_cmd_read_u16(struct cros_ec_device *ec,
+ unsigned int offset, u16 *dest)
+{
+ __le16 tmp;
+ int ret = ec->cmd_readmem(ec, offset, 2, &tmp);
+
+ if (ret >= 0)
+ *dest = le16_to_cpu(tmp);
+
+ return ret;
+}
+
+/**
+ * cros_ec_sensors_read_until_not_busy() - read until is not busy
+ *
+ * @st: pointer to state information for device
+ *
+ * Read from EC status byte until it reads not busy.
+ * Return: 8-bit status if ok, -errno on failure.
+ */
+static int cros_ec_sensors_read_until_not_busy(
+ struct cros_ec_sensors_core_state *st)
+{
+ struct cros_ec_device *ec = st->ec;
+ u8 status;
+ int ret, attempts = 0;
+
+ ret = cros_ec_sensors_cmd_read_u8(ec, EC_MEMMAP_ACC_STATUS, &status);
+ if (ret < 0)
+ return ret;
+
+ while (status & EC_MEMMAP_ACC_STATUS_BUSY_BIT) {
+ /* Give up after enough attempts, return error. */
+ if (attempts++ >= 50)
+ return -EIO;
+
+ /* Small delay every so often. */
+ if (attempts % 5 == 0)
+ msleep(25);
+
+ ret = cros_ec_sensors_cmd_read_u8(ec, EC_MEMMAP_ACC_STATUS,
+ &status);
+ if (ret < 0)
+ return ret;
+ }
+
+ return status;
+}
+
+/**
+ * read_ec_sensors_data_unsafe() - read acceleration data from EC shared memory
+ * @indio_dev: pointer to IIO device
+ * @scan_mask: bitmap of the sensor indices to scan
+ * @data: location to store data
+ *
+ * This is the unsafe function for reading the EC data. It does not guarantee
+ * that the EC will not modify the data as it is being read in.
+ *
+ * Return: 0 on success, -errno on failure.
+ */
+static int cros_ec_sensors_read_data_unsafe(struct iio_dev *indio_dev,
+ unsigned long scan_mask, s16 *data)
+{
+ struct cros_ec_sensors_core_state *st = iio_priv(indio_dev);
+ struct cros_ec_device *ec = st->ec;
+ unsigned int i;
+ int ret;
+
+ /* Read all sensors enabled in scan_mask. Each value is 2 bytes. */
+ for_each_set_bit(i, &scan_mask, indio_dev->masklength) {
+ ret = cros_ec_sensors_cmd_read_u16(ec,
+ cros_ec_sensors_idx_to_reg(st, i),
+ data);
+ if (ret < 0)
+ return ret;
+
+ data++;
+ }
+
+ return 0;
+}
+
+int cros_ec_sensors_read_lpc(struct iio_dev *indio_dev,
+ unsigned long scan_mask, s16 *data)
+{
+ struct cros_ec_sensors_core_state *st = iio_priv(indio_dev);
+ struct cros_ec_device *ec = st->ec;
+ u8 samp_id = 0xff, status = 0;
+ int ret, attempts = 0;
+
+ /*
+ * Continually read all data from EC until the status byte after
+ * all reads reflects that the EC is not busy and the sample id
+ * matches the sample id from before all reads. This guarantees
+ * that data read in was not modified by the EC while reading.
+ */
+ while ((status & (EC_MEMMAP_ACC_STATUS_BUSY_BIT |
+ EC_MEMMAP_ACC_STATUS_SAMPLE_ID_MASK)) != samp_id) {
+ /* If we have tried to read too many times, return error. */
+ if (attempts++ >= 5)
+ return -EIO;
+
+ /* Read status byte until EC is not busy. */
+ status = cros_ec_sensors_read_until_not_busy(st);
+ if (status < 0)
+ return status;
+
+ /*
+ * Store the current sample id so that we can compare to the
+ * sample id after reading the data.
+ */
+ samp_id = status & EC_MEMMAP_ACC_STATUS_SAMPLE_ID_MASK;
+
+ /* Read all EC data, format it, and store it into data. */
+ ret = cros_ec_sensors_read_data_unsafe(indio_dev, scan_mask,
+ data);
+ if (ret < 0)
+ return ret;
+
+ /* Read status byte. */
+ ret = cros_ec_sensors_cmd_read_u8(ec, EC_MEMMAP_ACC_STATUS,
+ &status);
+ if (ret < 0)
+ return ret;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(cros_ec_sensors_read_lpc);
+
+int cros_ec_sensors_read_cmd(struct iio_dev *indio_dev,
+ unsigned long scan_mask, s16 *data)
+{
+ struct cros_ec_sensors_core_state *st = iio_priv(indio_dev);
+ int ret;
+ unsigned int i;
+
+ /* Read all sensor data through a command. */
+ st->param.cmd = MOTIONSENSE_CMD_DATA;
+ ret = cros_ec_motion_send_host_cmd(st, sizeof(st->resp->data));
+ if (ret != 0) {
+ dev_warn(&indio_dev->dev, "Unable to read sensor data\n");
+ return ret;
+ }
+
+ for_each_set_bit(i, &scan_mask, indio_dev->masklength) {
+ *data = st->resp->data.data[i];
+ data++;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(cros_ec_sensors_read_cmd);
+
+irqreturn_t cros_ec_sensors_capture(int irq, void *p)
+{
+ struct iio_poll_func *pf = p;
+ struct iio_dev *indio_dev = pf->indio_dev;
+ struct cros_ec_sensors_core_state *st = iio_priv(indio_dev);
+ int ret;
+
+ mutex_lock(&st->cmd_lock);
+
+ /* Clear capture data. */
+ memset(st->samples, 0, indio_dev->scan_bytes);
+
+ /* Read data based on which channels are enabled in scan mask. */
+ ret = st->read_ec_sensors_data(indio_dev,
+ *(indio_dev->active_scan_mask),
+ (s16 *)st->samples);
+ if (ret < 0)
+ goto done;
+
+ iio_push_to_buffers_with_timestamp(indio_dev, st->samples,
+ iio_get_time_ns(indio_dev));
+
+done:
+ /*
+ * Tell the core we are done with this trigger and ready for the
+ * next one.
+ */
+ iio_trigger_notify_done(indio_dev->trig);
+
+ mutex_unlock(&st->cmd_lock);
+
+ return IRQ_HANDLED;
+}
+EXPORT_SYMBOL_GPL(cros_ec_sensors_capture);
+
+int cros_ec_sensors_core_read(struct cros_ec_sensors_core_state *st,
+ struct iio_chan_spec const *chan,
+ int *val, int *val2, long mask)
+{
+ int ret = IIO_VAL_INT;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_SAMP_FREQ:
+ st->param.cmd = MOTIONSENSE_CMD_EC_RATE;
+ st->param.ec_rate.data =
+ EC_MOTION_SENSE_NO_VALUE;
+
+ if (cros_ec_motion_send_host_cmd(st, 0))
+ ret = -EIO;
+ else
+ *val = st->resp->ec_rate.ret;
+ break;
+ case IIO_CHAN_INFO_FREQUENCY:
+ st->param.cmd = MOTIONSENSE_CMD_SENSOR_ODR;
+ st->param.sensor_odr.data =
+ EC_MOTION_SENSE_NO_VALUE;
+
+ if (cros_ec_motion_send_host_cmd(st, 0))
+ ret = -EIO;
+ else
+ *val = st->resp->sensor_odr.ret;
+ break;
+ default:
+ break;
+ }
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(cros_ec_sensors_core_read);
+
+int cros_ec_sensors_core_write(struct cros_ec_sensors_core_state *st,
+ struct iio_chan_spec const *chan,
+ int val, int val2, long mask)
+{
+ int ret = 0;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_FREQUENCY:
+ st->param.cmd = MOTIONSENSE_CMD_SENSOR_ODR;
+ st->param.sensor_odr.data = val;
+
+ /* Always roundup, so caller gets at least what it asks for. */
+ st->param.sensor_odr.roundup = 1;
+
+ if (cros_ec_motion_send_host_cmd(st, 0))
+ ret = -EIO;
+ break;
+ case IIO_CHAN_INFO_SAMP_FREQ:
+ st->param.cmd = MOTIONSENSE_CMD_EC_RATE;
+ st->param.ec_rate.data = val;
+
+ if (cros_ec_motion_send_host_cmd(st, 0))
+ ret = -EIO;
+ else
+ st->curr_sampl_freq = val;
+ break;
+ default:
+ ret = -EINVAL;
+ break;
+ }
+ return ret;
+}
+EXPORT_SYMBOL_GPL(cros_ec_sensors_core_write);
+
+MODULE_DESCRIPTION("ChromeOS EC sensor hub core functions");
+MODULE_LICENSE("GPL v2");
--- /dev/null
+/*
+ * ChromeOS EC sensor hub
+ *
+ * Copyright (C) 2016 Google, Inc
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef __CROS_EC_SENSORS_CORE_H
+#define __CROS_EC_SENSORS_CORE_H
+
+#include <linux/irqreturn.h>
+
+enum {
+ CROS_EC_SENSOR_X,
+ CROS_EC_SENSOR_Y,
+ CROS_EC_SENSOR_Z,
+ CROS_EC_SENSOR_MAX_AXIS,
+};
+
+/* EC returns sensor values using signed 16 bit registers */
+#define CROS_EC_SENSOR_BITS 16
+
+/*
+ * 4 16 bit channels are allowed.
+ * Good enough for current sensors, they use up to 3 16 bit vectors.
+ */
+#define CROS_EC_SAMPLE_SIZE (sizeof(s64) * 2)
+
+/* Minimum sampling period to use when device is suspending */
+#define CROS_EC_MIN_SUSPEND_SAMPLING_FREQUENCY 1000 /* 1 second */
+
+/**
+ * struct cros_ec_sensors_core_state - state data for EC sensors IIO driver
+ * @ec: cros EC device structure
+ * @cmd_lock: lock used to prevent simultaneous access to the
+ * commands.
+ * @msg: cros EC command structure
+ * @param: motion sensor parameters structure
+ * @resp: motion sensor response structure
+ * @type: type of motion sensor
+ * @loc: location where the motion sensor is placed
+ * @calib: calibration parameters. Note that trigger
+ * captured data will always provide the calibrated
+ * data
+ * @samples: static array to hold data from a single capture.
+ * For each channel we need 2 bytes, except for
+ * the timestamp. The timestamp is always last and
+ * is always 8-byte aligned.
+ * @read_ec_sensors_data: function used for accessing sensors values
+ * @cuur_sampl_freq: current sampling period
+ */
+struct cros_ec_sensors_core_state {
+ struct cros_ec_device *ec;
+ struct mutex cmd_lock;
+
+ struct cros_ec_command *msg;
+ struct ec_params_motion_sense param;
+ struct ec_response_motion_sense *resp;
+
+ enum motionsensor_type type;
+ enum motionsensor_location loc;
+
+ s16 calib[CROS_EC_SENSOR_MAX_AXIS];
+
+ u8 samples[CROS_EC_SAMPLE_SIZE];
+
+ int (*read_ec_sensors_data)(struct iio_dev *indio_dev,
+ unsigned long scan_mask, s16 *data);
+
+ int curr_sampl_freq;
+};
+
+/**
+ * cros_ec_sensors_read_lpc() - retrieve data from EC shared memory
+ * @indio_dev: pointer to IIO device
+ * @scan_mask: bitmap of the sensor indices to scan
+ * @data: location to store data
+ *
+ * This is the safe function for reading the EC data. It guarantees that the
+ * data sampled was not modified by the EC while being read.
+ *
+ * Return: 0 on success, -errno on failure.
+ */
+int cros_ec_sensors_read_lpc(struct iio_dev *indio_dev, unsigned long scan_mask,
+ s16 *data);
+
+/**
+ * cros_ec_sensors_read_cmd() - retrieve data using the EC command protocol
+ * @indio_dev: pointer to IIO device
+ * @scan_mask: bitmap of the sensor indices to scan
+ * @data: location to store data
+ *
+ * Return: 0 on success, -errno on failure.
+ */
+int cros_ec_sensors_read_cmd(struct iio_dev *indio_dev, unsigned long scan_mask,
+ s16 *data);
+
+/**
+ * cros_ec_sensors_core_init() - basic initialization of the core structure
+ * @pdev: platform device created for the sensors
+ * @indio_dev: iio device structure of the device
+ * @physical_device: true if the device refers to a physical device
+ *
+ * Return: 0 on success, -errno on failure.
+ */
+int cros_ec_sensors_core_init(struct platform_device *pdev,
+ struct iio_dev *indio_dev, bool physical_device);
+
+/**
+ * cros_ec_sensors_capture() - the trigger handler function
+ * @irq: the interrupt number.
+ * @p: a pointer to the poll function.
+ *
+ * On a trigger event occurring, if the pollfunc is attached then this
+ * handler is called as a threaded interrupt (and hence may sleep). It
+ * is responsible for grabbing data from the device and pushing it into
+ * the associated buffer.
+ *
+ * Return: IRQ_HANDLED
+ */
+irqreturn_t cros_ec_sensors_capture(int irq, void *p);
+
+/**
+ * cros_ec_motion_send_host_cmd() - send motion sense host command
+ * @st: pointer to state information for device
+ * @opt_length: optional length to reduce the response size, useful on the data
+ * path. Otherwise, the maximal allowed response size is used
+ *
+ * When called, the sub-command is assumed to be set in param->cmd.
+ *
+ * Return: 0 on success, -errno on failure.
+ */
+int cros_ec_motion_send_host_cmd(struct cros_ec_sensors_core_state *st,
+ u16 opt_length);
+
+/**
+ * cros_ec_sensors_core_read() - function to request a value from the sensor
+ * @st: pointer to state information for device
+ * @chan: channel specification structure table
+ * @val: will contain one element making up the returned value
+ * @val2: will contain another element making up the returned value
+ * @mask: specifies which values to be requested
+ *
+ * Return: the type of value returned by the device
+ */
+int cros_ec_sensors_core_read(struct cros_ec_sensors_core_state *st,
+ struct iio_chan_spec const *chan,
+ int *val, int *val2, long mask);
+
+/**
+ * cros_ec_sensors_core_write() - function to write a value to the sensor
+ * @st: pointer to state information for device
+ * @chan: channel specification structure table
+ * @val: first part of value to write
+ * @val2: second part of value to write
+ * @mask: specifies which values to write
+ *
+ * Return: the type of value returned by the device
+ */
+int cros_ec_sensors_core_write(struct cros_ec_sensors_core_state *st,
+ struct iio_chan_spec const *chan,
+ int val, int val2, long mask);
+
+/* List of extended channel specification for all sensors */
+extern const struct iio_chan_spec_ext_info cros_ec_sensors_ext_info[];
+
+#endif /* __CROS_EC_SENSORS_CORE_H */
*/
MOTIONSENSE_CMD_KB_WAKE_ANGLE = 5,
+ /*
+ * Returns a single sensor data.
+ */
+ MOTIONSENSE_CMD_DATA = 6,
+
+ /*
+ * Perform low level calibration.. On sensors that support it, ask to
+ * do offset calibration.
+ */
+ MOTIONSENSE_CMD_PERFORM_CALIB = 10,
+
+ /*
+ * Sensor Offset command is a setter/getter command for the offset used
+ * for calibration. The offsets can be calculated by the host, or via
+ * PERFORM_CALIB command.
+ */
+ MOTIONSENSE_CMD_SENSOR_OFFSET = 11,
+
/* Number of motionsense sub-commands. */
MOTIONSENSE_NUM_CMDS
};
enum motionsensor_type {
MOTIONSENSE_TYPE_ACCEL = 0,
MOTIONSENSE_TYPE_GYRO = 1,
+ MOTIONSENSE_TYPE_MAG = 2,
+ MOTIONSENSE_TYPE_PROX = 3,
+ MOTIONSENSE_TYPE_LIGHT = 4,
+ MOTIONSENSE_TYPE_ACTIVITY = 5,
+ MOTIONSENSE_TYPE_MAX
};
/* List of motion sensor locations. */
enum motionsensor_location {
MOTIONSENSE_LOC_BASE = 0,
MOTIONSENSE_LOC_LID = 1,
+ MOTIONSENSE_LOC_MAX,
};
/* List of motion sensor chips. */
*/
#define EC_MOTION_SENSE_NO_VALUE -1
+#define EC_MOTION_SENSE_INVALID_CALIB_TEMP 0x8000
+
+/* Set Calibration information */
+#define MOTION_SENSE_SET_OFFSET 1
+
+struct ec_response_motion_sensor_data {
+ /* Flags for each sensor. */
+ uint8_t flags;
+ /* Sensor number the data comes from */
+ uint8_t sensor_num;
+ /* Each sensor is up to 3-axis. */
+ union {
+ int16_t data[3];
+ struct {
+ uint16_t rsvd;
+ uint32_t timestamp;
+ } __packed;
+ struct {
+ uint8_t activity; /* motionsensor_activity */
+ uint8_t state;
+ int16_t add_info[2];
+ };
+ };
+} __packed;
+
struct ec_params_motion_sense {
uint8_t cmd;
union {
int16_t data;
} ec_rate, kb_wake_angle;
+ /* Used for MOTIONSENSE_CMD_SENSOR_OFFSET */
+ struct {
+ uint8_t sensor_num;
+
+ /*
+ * bit 0: If set (MOTION_SENSE_SET_OFFSET), set
+ * the calibration information in the EC.
+ * If unset, just retrieve calibration information.
+ */
+ uint16_t flags;
+
+ /*
+ * Temperature at calibration, in units of 0.01 C
+ * 0x8000: invalid / unknown.
+ * 0x0: 0C
+ * 0x7fff: +327.67C
+ */
+ int16_t temp;
+
+ /*
+ * Offset for calibration.
+ * Unit:
+ * Accelerometer: 1/1024 g
+ * Gyro: 1/1024 deg/s
+ * Compass: 1/16 uT
+ */
+ int16_t offset[3];
+ } __packed sensor_offset;
+
/* Used for MOTIONSENSE_CMD_INFO. */
struct {
- /* Should be element of enum motionsensor_id. */
uint8_t sensor_num;
} info;
/* Flags representing the motion sensor module. */
uint8_t module_flags;
- /* Flags for each sensor in enum motionsensor_id. */
- uint8_t sensor_flags[EC_MOTION_SENSOR_COUNT];
+ /* Number of sensors managed directly by the EC. */
+ uint8_t sensor_count;
- /* Array of all sensor data. Each sensor is 3-axis. */
- int16_t data[3*EC_MOTION_SENSOR_COUNT];
+ /*
+ * Sensor data is truncated if response_max is too small
+ * for holding all the data.
+ */
+ struct ec_response_motion_sensor_data sensor[0];
} dump;
/* Used for MOTIONSENSE_CMD_INFO. */
uint8_t chip;
} info;
+ /* Used for MOTIONSENSE_CMD_DATA */
+ struct ec_response_motion_sensor_data data;
+
/*
* Used for MOTIONSENSE_CMD_EC_RATE, MOTIONSENSE_CMD_SENSOR_ODR,
* MOTIONSENSE_CMD_SENSOR_RANGE, and
/* Current value of the parameter queried. */
int32_t ret;
} ec_rate, sensor_odr, sensor_range, kb_wake_angle;
+
+ /* Used for MOTIONSENSE_CMD_SENSOR_OFFSET */
+ struct {
+ int16_t temp;
+ int16_t offset[3];
+ } sensor_offset, perform_calib;
};
} __packed;
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