147 lines
5.3 KiB
C
147 lines
5.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
|
|
/*
|
|
* Surface DTX (clipboard detachment system driver) user-space interface.
|
|
*
|
|
* Definitions, structs, and IOCTLs for the /dev/surface/dtx misc device. This
|
|
* device allows user-space to control the clipboard detachment process on
|
|
* Surface Book series devices.
|
|
*
|
|
* Copyright (C) 2020-2021 Maximilian Luz <luzmaximilian@gmail.com>
|
|
*/
|
|
|
|
#ifndef _LINUX_SURFACE_AGGREGATOR_DTX_H
|
|
#define _LINUX_SURFACE_AGGREGATOR_DTX_H
|
|
|
|
#include <linux/ioctl.h>
|
|
#include <linux/types.h>
|
|
|
|
/* Status/error categories */
|
|
#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)
|
|
|
|
/* Latch status values */
|
|
#define SDTX_LATCH_CLOSED SDTX_STATUS(0x00)
|
|
#define SDTX_LATCH_OPENED SDTX_STATUS(0x01)
|
|
|
|
/* Base state values */
|
|
#define SDTX_BASE_DETACHED SDTX_STATUS(0x00)
|
|
#define SDTX_BASE_ATTACHED SDTX_STATUS(0x01)
|
|
|
|
/* Runtime errors (non-critical) */
|
|
#define SDTX_DETACH_NOT_FEASIBLE SDTX_ERR_RT(0x01)
|
|
#define SDTX_DETACH_TIMEDOUT SDTX_ERR_RT(0x02)
|
|
|
|
/* Hardware errors (critical) */
|
|
#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)
|
|
|
|
/* Base types */
|
|
#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 - Mode describing how (and if) the clipboard is
|
|
* attached to the base of the device.
|
|
* @SDTX_DEVICE_MODE_TABLET: The clipboard is detached from the base and the
|
|
* device operates as tablet.
|
|
* @SDTX_DEVICE_MODE_LAPTOP: The clipboard is attached normally to the base
|
|
* and the device operates as laptop.
|
|
* @SDTX_DEVICE_MODE_STUDIO: The clipboard is attached to the base in reverse.
|
|
* The device operates as tablet with keyboard and
|
|
* touchpad deactivated, however, the base battery
|
|
* and, if present in the specific device model, dGPU
|
|
* are available to the system.
|
|
*/
|
|
enum sdtx_device_mode {
|
|
SDTX_DEVICE_MODE_TABLET = 0x00,
|
|
SDTX_DEVICE_MODE_LAPTOP = 0x01,
|
|
SDTX_DEVICE_MODE_STUDIO = 0x02,
|
|
};
|
|
|
|
/**
|
|
* struct sdtx_event - Event provided by reading from the DTX device file.
|
|
* @length: Length of the event payload, in bytes.
|
|
* @code: Event code, detailing what type of event this is.
|
|
* @data: Payload of the event, containing @length bytes.
|
|
*
|
|
* See &enum sdtx_event_code for currently valid event codes.
|
|
*/
|
|
struct sdtx_event {
|
|
__u16 length;
|
|
__u16 code;
|
|
__u8 data[];
|
|
} __attribute__((__packed__));
|
|
|
|
/**
|
|
* enum sdtx_event_code - Code describing the type of an event.
|
|
* @SDTX_EVENT_REQUEST: Detachment request event type.
|
|
* @SDTX_EVENT_CANCEL: Cancel detachment process event type.
|
|
* @SDTX_EVENT_BASE_CONNECTION: Base/clipboard connection change event type.
|
|
* @SDTX_EVENT_LATCH_STATUS: Latch status change event type.
|
|
* @SDTX_EVENT_DEVICE_MODE: Device mode change event type.
|
|
*
|
|
* Used in &struct sdtx_event to describe the type of the event. Further event
|
|
* codes are reserved for future use. Any event parser should be able to
|
|
* gracefully handle unknown events, i.e. by simply skipping them.
|
|
*
|
|
* Consult the DTX user-space interface documentation for details regarding
|
|
* the individual event types.
|
|
*/
|
|
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 - Describes if and what type of base is connected.
|
|
* @state: The state of the connection. Valid values are %SDTX_BASE_DETACHED,
|
|
* %SDTX_BASE_ATTACHED, and %SDTX_DETACH_NOT_FEASIBLE (in case a base
|
|
* is attached but low clipboard battery prevents detachment). Other
|
|
* values are currently reserved.
|
|
* @base_id: The type of base connected. Zero if no base is connected.
|
|
*/
|
|
struct sdtx_base_info {
|
|
__u16 state;
|
|
__u16 base_id;
|
|
} __attribute__((__packed__));
|
|
|
|
/* IOCTLs */
|
|
#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 /* _LINUX_SURFACE_AGGREGATOR_DTX_H */
|