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77 lines
2.0 KiB
77 lines
2.0 KiB
/* SPDX-License-Identifier: GPL-2.0+ */ |
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/* |
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* Common/core components for the Surface System Aggregator Module (SSAM) HID |
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* transport driver. Provides support for integrated HID devices on Microsoft |
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* Surface models. |
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* |
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* Copyright (C) 2019-2021 Maximilian Luz <[email protected]> |
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*/ |
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#ifndef SURFACE_HID_CORE_H |
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#define SURFACE_HID_CORE_H |
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#include <linux/hid.h> |
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#include <linux/pm.h> |
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#include <linux/types.h> |
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#include <linux/surface_aggregator/controller.h> |
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#include <linux/surface_aggregator/device.h> |
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enum surface_hid_descriptor_entry { |
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SURFACE_HID_DESC_HID = 0, |
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SURFACE_HID_DESC_REPORT = 1, |
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SURFACE_HID_DESC_ATTRS = 2, |
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}; |
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struct surface_hid_descriptor { |
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__u8 desc_len; /* = 9 */ |
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__u8 desc_type; /* = HID_DT_HID */ |
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__le16 hid_version; |
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__u8 country_code; |
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__u8 num_descriptors; /* = 1 */ |
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__u8 report_desc_type; /* = HID_DT_REPORT */ |
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__le16 report_desc_len; |
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} __packed; |
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static_assert(sizeof(struct surface_hid_descriptor) == 9); |
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struct surface_hid_attributes { |
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__le32 length; |
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__le16 vendor; |
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__le16 product; |
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__le16 version; |
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__u8 _unknown[22]; |
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} __packed; |
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static_assert(sizeof(struct surface_hid_attributes) == 32); |
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struct surface_hid_device; |
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struct surface_hid_device_ops { |
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int (*get_descriptor)(struct surface_hid_device *shid, u8 entry, u8 *buf, size_t len); |
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int (*output_report)(struct surface_hid_device *shid, u8 rprt_id, u8 *buf, size_t len); |
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int (*get_feature_report)(struct surface_hid_device *shid, u8 rprt_id, u8 *buf, size_t len); |
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int (*set_feature_report)(struct surface_hid_device *shid, u8 rprt_id, u8 *buf, size_t len); |
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}; |
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struct surface_hid_device { |
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struct device *dev; |
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struct ssam_controller *ctrl; |
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struct ssam_device_uid uid; |
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struct surface_hid_descriptor hid_desc; |
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struct surface_hid_attributes attrs; |
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struct ssam_event_notifier notif; |
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struct hid_device *hid; |
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struct surface_hid_device_ops ops; |
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}; |
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int surface_hid_device_add(struct surface_hid_device *shid); |
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void surface_hid_device_destroy(struct surface_hid_device *shid); |
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extern const struct dev_pm_ops surface_hid_pm_ops; |
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#endif /* SURFACE_HID_CORE_H */
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