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/**
* Hillcrest SensorHub driver
*
* Copyright (C) 2013-14 Hillcrest Labs, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>
*/
#ifndef __SENSORHUB__
#define __SENSORHUB__
#ifdef __KERNEL__
#include <linux/ioctl.h>
#else
#include <sys/ioctl.h>
#endif
/**
* Each read() returns a (variable length) sensorhub_input_event structure if
* SH_IOC_SET_REPORT_METADATA is enabled. The HID input report is placed at the
* end of the header section and can be accessed with the msg field.
*/
struct sensorhub_input_event {
// event timestamp in nanoseconds
__u64 timestamp;
// variable length msg array
__u32 len;
__u8 msg[];
} __attribute__((packed));
/* ioctl Interface */
/* Get sysfs path where attributes are defined */
#define SH_IOC_GET_SYSFS_PATH(len) _IOC(_IOC_READ, 'S', 0x01, len)
/**
* Get and Set feature reports
* The first byte of the buffer for each op should be the report id
* The ioctl returns the length of the bytes read/written from/to the
* device.
*/
#define SH_IOC_GET_FEATURE(len) _IOC(_IOC_READ | _IOC_WRITE, 'S', 0x02, len)
#define SH_IOC_SET_FEATURE(len) _IOC(_IOC_READ | _IOC_WRITE, 'S', 0x03, len)
/**
* Enable/disable report metadata.
* When enabled, each read will be pre-fixed with a struct sensorhub_input_event
*/
#define SH_IOC_SET_REPORT_METADATA _IOW('S', 0x04, int)
#ifdef __KERNEL__
#define SENSORHUB_I2C_ID "sensorhub"
#define SENSORHUB_I2C_ADDR 0x48
struct sensorhub_platform_data {
/**
* The IRQ number for the sensorhub interrupt
*/
int irq;
/**
* The GPIO corresponding to the interrupt
* Must be configured as an input and pull-up enabled
*/
int gpio_interrupt;
/**
* A GPIO to reset the hardware
* Must be configured as an output
*/
int gpio_reset;
/**
* An optional debug (output) GPIO used by the driver
* Must be configured as an output
*/
int gpio_debug;
/**
* A wakeup pin for the Sensorhub.
* Must be configured as an output.
*/
int gpio_wakeup;
/**
* Callback function for any platform initialization/de-init
* @param enabled = 1 on first hardware access, 0 on shutdown
*/
int (* setup)(struct device *dev, int enabled);
};
#endif /* __KERNEL__ */
#endif /* __SENSORHUB__ */
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