/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */


#ifndef _UAPI_LINUX_SURFACE_AGGREGATOR_DTX_H
#define _UAPI_LINUX_SURFACE_AGGREGATOR_DTX_H

#include <linux/ioctl.h>
#include <linux/types.h>


#define SDTX_CATEGORY_STATUS		0x0000
#define SDTX_CATEGORY_RUNTIME_ERROR	0x1000
#define SDTX_CATEGORY_HARDWARE_ERROR	0x2000
#define SDTX_CATEGORY_UNKNOWN		0xf000

#define SDTX_CATEGORY_MASK		0xf000
#define SDTX_CATEGORY(value)		((value) & SDTX_CATEGORY_MASK)

#define SDTX_STATUS(code)		((code) | SDTX_CATEGORY_STATUS)
#define SDTX_ERR_RT(code)		((code) | SDTX_CATEGORY_RUNTIME_ERROR)
#define SDTX_ERR_HW(code)		((code) | SDTX_CATEGORY_HARDWARE_ERROR)
#define SDTX_UNKNOWN(code)		((code) | SDTX_CATEGORY_UNKNOWN)

#define SDTX_SUCCESS(value)		(SDTX_CATEGORY(value) == SDTX_CATEGORY_STATUS)


#define SDTX_LATCH_CLOSED		SDTX_STATUS(0x00)
#define SDTX_LATCH_OPENED		SDTX_STATUS(0x01)


#define SDTX_BASE_DETACHED		SDTX_STATUS(0x00)
#define SDTX_BASE_ATTACHED		SDTX_STATUS(0x01)


#define SDTX_DETACH_NOT_FEASIBLE	SDTX_ERR_RT(0x01)
#define SDTX_DETACH_TIMEDOUT		SDTX_ERR_RT(0x02)


#define SDTX_ERR_FAILED_TO_OPEN		SDTX_ERR_HW(0x01)
#define SDTX_ERR_FAILED_TO_REMAIN_OPEN	SDTX_ERR_HW(0x02)
#define SDTX_ERR_FAILED_TO_CLOSE	SDTX_ERR_HW(0x03)


#define SDTX_DEVICE_TYPE_HID		0x0100
#define SDTX_DEVICE_TYPE_SSH		0x0200

#define SDTX_DEVICE_TYPE_MASK		0x0f00
#define SDTX_DEVICE_TYPE(value)		((value) & SDTX_DEVICE_TYPE_MASK)

#define SDTX_BASE_TYPE_HID(id)		((id) | SDTX_DEVICE_TYPE_HID)
#define SDTX_BASE_TYPE_SSH(id)		((id) | SDTX_DEVICE_TYPE_SSH)


enum sdtx_device_mode {
	SDTX_DEVICE_MODE_TABLET		= 0x00,
	SDTX_DEVICE_MODE_LAPTOP		= 0x01,
	SDTX_DEVICE_MODE_STUDIO		= 0x02,
};


struct sdtx_event {
	__u16 length;
	__u16 code;
	__u8 data[];
} __attribute__((__packed__));


enum sdtx_event_code {
	SDTX_EVENT_REQUEST		= 1,
	SDTX_EVENT_CANCEL		= 2,
	SDTX_EVENT_BASE_CONNECTION	= 3,
	SDTX_EVENT_LATCH_STATUS		= 4,
	SDTX_EVENT_DEVICE_MODE		= 5,
};


struct sdtx_base_info {
	__u16 state;
	__u16 base_id;
} __attribute__((__packed__));


#define SDTX_IOCTL_EVENTS_ENABLE	_IO(0xa5, 0x21)
#define SDTX_IOCTL_EVENTS_DISABLE	_IO(0xa5, 0x22)

#define SDTX_IOCTL_LATCH_LOCK		_IO(0xa5, 0x23)
#define SDTX_IOCTL_LATCH_UNLOCK		_IO(0xa5, 0x24)

#define SDTX_IOCTL_LATCH_REQUEST	_IO(0xa5, 0x25)
#define SDTX_IOCTL_LATCH_CONFIRM	_IO(0xa5, 0x26)
#define SDTX_IOCTL_LATCH_HEARTBEAT	_IO(0xa5, 0x27)
#define SDTX_IOCTL_LATCH_CANCEL		_IO(0xa5, 0x28)

#define SDTX_IOCTL_GET_BASE_INFO	_IOR(0xa5, 0x29, struct sdtx_base_info)
#define SDTX_IOCTL_GET_DEVICE_MODE	_IOR(0xa5, 0x2a, __u16)
#define SDTX_IOCTL_GET_LATCH_STATUS	_IOR(0xa5, 0x2b, __u16)

#endif 
