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📁 ..	-	2026-03-27 02:43
📄 cdev.h /* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note / / * Surface System Aggregator Module (SSAM) user-space EC interface. * * Definitions, structs, and IOCTLs for the /dev/surface/aggregator misc * device. This device provides direct user-space access to the SSAM EC. * Intended for debugging and development. * * Copyright (C) 2020-2021 Maximilian Luz <luzmaximilian@gmail.com> / #ifndef _LINUX_SURFACE_AGGREGATOR_CDEV_H #define _LINUX_SURFACE_AGGREGATOR_CDEV_H #include <linux/ioctl.h> #include <linux/types.h> /* * enum ssam_cdev_request_flags - Request flags for SSAM cdev request IOCTL. * * @SSAM_CDEV_REQUEST_HAS_RESPONSE: * Specifies that the request expects a response. If not set, the request * will be directly completed after its underlying packet has been * transmitted. If set, the request transport system waits for a response * of the request. * * @SSAM_CDEV_REQUEST_UNSEQUENCED: * Specifies that the request should be transmitted via an unsequenced * packet. If set, the request must not have a response, meaning that this * flag and the %SSAM_CDEV_REQUEST_HAS_RESPONSE flag are mutually * exclusive. / enum ssam_cdev_request_flags { SSAM_CDEV_REQUEST_HAS_RESPONSE = 0x01, SSAM_CDEV_REQUEST_UNSEQUENCED = 0x02, }; /* * struct ssam_cdev_request - Controller request IOCTL argument. * @target_category: Target category of the SAM request. * @target_id: Target ID of the SAM request. * @command_id: Command ID of the SAM request. * @instance_id: Instance ID of the SAM request. * @flags: Request flags (see &enum ssam_cdev_request_flags). * @status: Request status (output). * @payload: Request payload (input data). * @payload.data: Pointer to request payload data. * @payload.length: Length of request payload data (in bytes). * @response: Request response (output data). * @response.data: Pointer to response buffer. * @response.length: On input: Capacity of response buffer (in bytes). * On output: Length of request response (number of bytes * in the buffer that are actually used). / struct ssam_cdev_request { __u8 target_category; __u8 target_id; __u8 command_id; __u8 instance_id; __u16 flags; __s16 status; struct { __u64 data; __u16 length; __u8 __pad[6]; } payload; struct { __u64 data; __u16 length; __u8 __pad[6]; } response; } __attribute__((__packed__)); /* * struct ssam_cdev_notifier_desc - Notifier descriptor. * @priority: Priority value determining the order in which notifier * callbacks will be called. A higher value means higher * priority, i.e. the associated callback will be executed * earlier than other (lower priority) callbacks. * @target_category: The event target category for which this notifier should * receive events. * * Specifies the notifier that should be registered or unregistered, * specifically with which priority and for which target category of events. / struct ssam_cdev_notifier_desc { __s32 priority; __u8 target_category; } __attribute__((__packed__)); /* * struct ssam_cdev_event_desc - Event descriptor. * @reg: Registry via which the event will be enabled/disabled. * @reg.target_category: Target category for the event registry requests. * @reg.target_id: Target ID for the event registry requests. * @reg.cid_enable: Command ID for the event-enable request. * @reg.cid_disable: Command ID for the event-disable request. * @id: ID specifying the event. * @id.target_category: Target category of the event source. * @id.instance: Instance ID of the event source. * @flags: Flags used for enabling the event. * * Specifies which event should be enabled/disabled and how to do that. / struct ssam_cdev_event_desc { struct { __u8 target_category; __u8 target_id; __u8 cid_enable; __u8 cid_disable; } reg; struct { __u8 target_category; __u8 instance; } id; __u8 flags; } __attribute__((__packed__)); /* * struct ssam_cdev_event - SSAM event sent by the EC. * @target_category: Target category of the event source. See &enum ssam_ssh_tc. * @target_id: Target ID of the event source. * @command_id: Command ID of the event. * @instance_id: Instance ID of the event source. * @length: Length of the event payload in bytes. * @data: Event payload data. / struct ssam_cdev_event { __u8 target_category; __u8 target_id; __u8 command_id; __u8 instance_id; __u16 length; __u8 data[]; } __attribute__((__packed__)); #define SSAM_CDEV_REQUEST _IOWR(0xA5, 1, struct ssam_cdev_request) #define SSAM_CDEV_NOTIF_REGISTER _IOW(0xA5, 2, struct ssam_cdev_notifier_desc) #define SSAM_CDEV_NOTIF_UNREGISTER _IOW(0xA5, 3, struct ssam_cdev_notifier_desc) #define SSAM_CDEV_EVENT_ENABLE _IOW(0xA5, 4, struct ssam_cdev_event_desc) #define SSAM_CDEV_EVENT_DISABLE _IOW(0xA5, 5, struct ssam_cdev_event_desc) #endif / _LINUX_SURFACE_AGGREGATOR_CDEV_H */	5.01 KB	2026-03-24 10:01
📄 dtx.h /* 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 */	5.31 KB	2026-03-24 10:01

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