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/*************************************************************************** |
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* Copyright (c) 2024 Microsoft Corporation |
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* Copyright (c) 2026-present Eclipse ThreadX contributors |
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* |
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* This program and the accompanying materials are made available under the |
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* terms of the MIT License which is available at |
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* https://opensource.org/licenses/MIT. |
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* |
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* SPDX-License-Identifier: MIT |
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**************************************************************************/ |
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/**************************************************************************/ |
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/**************************************************************************/ |
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/** */ |
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/** USBX Component */ |
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/** */ |
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/** HID Keyboard Client */ |
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/** */ |
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/**************************************************************************/ |
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/**************************************************************************/ |
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/* Include necessary system files. */ |
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#define UX_SOURCE_CODE |
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#include "ux_api.h" |
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#include "ux_host_class_hid.h" |
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#include "ux_host_class_hid_keyboard.h" |
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#include "ux_host_stack.h" |
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#if defined(UX_HOST_STANDALONE) |
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#define UX_HOST_CLASS_HID_KEYBOARD_ENUM_START (UX_STATE_WAIT) |
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#define UX_HOST_CLASS_HID_KEYBOARD_ENUM_SET_REPORT (UX_STATE_STACK_STEP + 0) |
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#define UX_HOST_CLASS_HID_KEYBOARD_ENUM_SET_IDLE (UX_STATE_STACK_STEP + 1) |
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#define UX_HOST_CLASS_HID_KEYBOARD_ENUM_CMD_WAIT (UX_STATE_STACK_STEP + 2) |
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#define UX_HOST_CLASS_HID_KEYBOARD_ENUM_PERIODIC_START (UX_STATE_STACK_STEP + 3) |
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#define UX_HOST_CLASS_HID_KEYBOARD_ENUM_DONE (UX_STATE_STACK_STEP + 4) |
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static inline UINT _ux_host_class_hid_keyboard_activate_wait(UX_HOST_CLASS_HID_CLIENT_COMMAND *command); |
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#endif |
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/**************************************************************************/ |
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/* */ |
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/* FUNCTION RELEASE */ |
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/* */ |
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/* _ux_host_class_hid_keyboard_entry PORTABLE C */ |
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/* 6.1.10 */ |
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/* AUTHOR */ |
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/* */ |
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/* Chaoqiong Xiao, Microsoft Corporation */ |
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/* */ |
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/* DESCRIPTION */ |
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/* */ |
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/* This function is the entry point of the HID keyboard client. */ |
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/* This function is called by the HID class after it has parsed a new */ |
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/* HID report descriptor and is searching for a HID client. */ |
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/* */ |
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/* INPUT */ |
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/* */ |
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/* command Pointer to command */ |
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/* */ |
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/* OUTPUT */ |
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/* */ |
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/* Completion Status */ |
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/* */ |
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/* CALLS */ |
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/* */ |
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/* _ux_host_class_hid_keyboard_activate */ |
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/* Activate HID keyboard */ |
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/* _ux_host_class_hid_keyboard_deactivate */ |
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/* Deactivate HID keyboard */ |
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/* */ |
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/* CALLED BY */ |
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/* */ |
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/* HID Class */ |
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/* */ |
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/**************************************************************************/ |
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UINT _ux_host_class_hid_keyboard_entry(UX_HOST_CLASS_HID_CLIENT_COMMAND *command) |
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{ |
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UINT status; |
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/* The command request will tell us we need to do here, either a enumeration |
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query, an activation or a deactivation. */ |
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✓✓✓✓
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switch (command -> ux_host_class_hid_client_command_request) |
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{ |
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case UX_HOST_CLASS_COMMAND_QUERY: |
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/* The query command is used to let the HID class know if we want to own |
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this device or not */ |
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✓✓ |
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if ((command -> ux_host_class_hid_client_command_page == UX_HOST_CLASS_HID_PAGE_GENERIC_DESKTOP_CONTROLS) && |
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✓✓ |
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(command -> ux_host_class_hid_client_command_usage == UX_HOST_CLASS_HID_GENERIC_DESKTOP_KEYBOARD)) |
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return(UX_SUCCESS); |
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else |
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return(UX_NO_CLASS_MATCH); |
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case UX_HOST_CLASS_COMMAND_ACTIVATE: |
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/* The activate command is used by the HID class to start the HID client. */ |
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status = _ux_host_class_hid_keyboard_activate(command); |
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/* Return completion status. */ |
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return(status); |
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#if defined(UX_HOST_STANDALONE) |
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case UX_HOST_CLASS_COMMAND_ACTIVATE_WAIT: |
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return(_ux_host_class_hid_keyboard_activate_wait(command)); |
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#endif |
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case UX_HOST_CLASS_COMMAND_DEACTIVATE: |
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/* The deactivate command is used by the HID class when it received a deactivate |
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command from the USBX stack and there was a HID client attached to the HID instance */ |
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status = _ux_host_class_hid_keyboard_deactivate(command); |
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/* Return completion status. */ |
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return(status); |
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} |
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/* Return error status. */ |
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return(UX_ERROR); |
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} |
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#if defined(UX_HOST_STANDALONE) |
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static inline UINT _ux_host_class_hid_keyboard_activate_wait(UX_HOST_CLASS_HID_CLIENT_COMMAND *command) |
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{ |
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UX_HOST_CLASS_HID *hid; |
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UX_HOST_CLASS_HID_CLIENT *hid_client; |
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UX_HOST_CLASS_HID_KEYBOARD *keyboard; |
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UINT status; |
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/* Get the instance to the HID class. */ |
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hid = command -> ux_host_class_hid_client_command_instance; |
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/* And of the HID client. */ |
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hid_client = hid -> ux_host_class_hid_client; |
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/* And of the keyboard instance. */ |
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keyboard = (UX_HOST_CLASS_HID_KEYBOARD *) hid_client -> ux_host_class_hid_client_local_instance; |
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/* Run states. */ |
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switch(keyboard -> ux_host_class_hid_keyboard_enum_state) |
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{ |
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case UX_HOST_CLASS_HID_KEYBOARD_ENUM_START: |
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/* Fall through. */ |
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case UX_HOST_CLASS_HID_KEYBOARD_ENUM_SET_REPORT: |
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/* Update LED in task. */ |
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keyboard -> ux_host_class_hid_keyboard_out_state = UX_STATE_WAIT; |
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keyboard -> ux_host_class_hid_keyboard_enum_state = |
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UX_HOST_CLASS_HID_KEYBOARD_ENUM_CMD_WAIT; |
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keyboard -> ux_host_class_hid_keyboard_next_state = |
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UX_HOST_CLASS_HID_KEYBOARD_ENUM_SET_IDLE; |
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return(UX_STATE_WAIT); |
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case UX_HOST_CLASS_HID_KEYBOARD_ENUM_CMD_WAIT: |
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/* LEDs processed in background task. */ |
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if (keyboard -> ux_host_class_hid_keyboard_out_state != UX_STATE_WAIT) |
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{ |
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if (keyboard -> ux_host_class_hid_keyboard_status != UX_SUCCESS) |
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keyboard -> ux_host_class_hid_keyboard_enum_state = |
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UX_HOST_CLASS_HID_KEYBOARD_ENUM_DONE; |
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else |
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keyboard -> ux_host_class_hid_keyboard_enum_state = |
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keyboard -> ux_host_class_hid_keyboard_next_state; |
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} |
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return(UX_STATE_WAIT); |
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case UX_HOST_CLASS_HID_KEYBOARD_ENUM_SET_IDLE: |
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/* Run SET_IDLE states. */ |
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status = _ux_host_class_hid_idle_set_run(hid, 0, |
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keyboard -> ux_host_class_hid_keyboard_id); |
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if (status < UX_STATE_WAIT) |
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{ |
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keyboard -> ux_host_class_hid_keyboard_status = |
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hid -> ux_host_class_hid_status; |
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/* Set_Idle is mandatory, if there is error enum fail. */ |
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if (keyboard -> ux_host_class_hid_keyboard_status == UX_SUCCESS) |
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keyboard -> ux_host_class_hid_keyboard_enum_state = |
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UX_HOST_CLASS_HID_KEYBOARD_ENUM_PERIODIC_START; |
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else |
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keyboard -> ux_host_class_hid_keyboard_enum_state = |
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UX_HOST_CLASS_HID_KEYBOARD_ENUM_DONE; |
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} |
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return(UX_STATE_WAIT); |
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case UX_HOST_CLASS_HID_KEYBOARD_ENUM_PERIODIC_START: |
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/* Start the periodic report. */ |
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status = _ux_host_class_hid_periodic_report_start(hid); |
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keyboard -> ux_host_class_hid_keyboard_status = status; |
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/* Fall through. */ |
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case UX_HOST_CLASS_HID_KEYBOARD_ENUM_DONE: |
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/* Anything failed, Free resources. */ |
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if (keyboard -> ux_host_class_hid_keyboard_status != UX_SUCCESS) |
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{ |
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/* Detach instance. */ |
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hid_client -> ux_host_class_hid_client_local_instance = UX_NULL; |
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/* Free usage state. */ |
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if (keyboard -> ux_host_class_hid_keyboard_key_state) |
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_ux_utility_memory_free(keyboard -> ux_host_class_hid_keyboard_key_state); |
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/* Free usage array. */ |
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if (keyboard -> ux_host_class_hid_keyboard_usage_array) |
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_ux_utility_memory_free(keyboard -> ux_host_class_hid_keyboard_usage_array); |
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/* Free instance. */ |
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_ux_utility_memory_free(keyboard); |
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return(UX_STATE_ERROR); |
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} |
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/* Now keyboard instance is live. */ |
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keyboard -> ux_host_class_hid_keyboard_state = UX_HOST_CLASS_INSTANCE_LIVE; |
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/* If all is fine and the device is mounted, we may need to inform the application |
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if a function has been programmed in the system structure. */ |
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if (_ux_system_host -> ux_system_host_change_function != UX_NULL) |
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{ |
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/* Call system change function. */ |
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_ux_system_host -> ux_system_host_change_function(UX_HID_CLIENT_INSERTION, hid -> ux_host_class_hid_class, (VOID *) hid_client); |
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} |
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/* If trace is enabled, insert this event into the trace buffer. */ |
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UX_TRACE_IN_LINE_INSERT(UX_TRACE_HOST_CLASS_HID_KEYBOARD_ACTIVATE, hid, keyboard, 0, 0, UX_TRACE_HOST_CLASS_EVENTS, 0, 0) |
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/* Enumeration idle. */ |
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keyboard -> ux_host_class_hid_keyboard_enum_state = UX_STATE_IDLE; |
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return(UX_STATE_NEXT); |
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default: /* IDLE, Other states. */ |
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return(UX_STATE_NEXT); |
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} |
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} |
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#endif |