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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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/** HUB Class */ |
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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_hub.h" |
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#include "ux_host_stack.h" |
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#if defined(UX_HOST_STANDALONE) |
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extern UINT _ux_host_class_hub_descriptor_parse(UX_HOST_CLASS_HUB *hub, UCHAR *descriptor); |
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static inline UINT _ux_host_class_hub_activate_wait(UX_HOST_CLASS_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_hub_entry PORTABLE C */ |
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/* 6.3.0 */ |
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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 HUB class. It will be */ |
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/* called by the USBX stack enumeration module when there is a new */ |
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/* device on the bus or when there is a device extraction. */ |
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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_hub_activate Activate HUB class */ |
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/* _ux_host_class_hub_deactivate Deactivate HUB class */ |
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/* */ |
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/* CALLED BY */ |
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/* */ |
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/* Host Stack */ |
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/* */ |
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/**************************************************************************/ |
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UINT _ux_host_class_hub_entry(UX_HOST_CLASS_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_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 stack enumeration process 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_command_usage == UX_HOST_CLASS_COMMAND_USAGE_DCSP) && |
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✓✓ |
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(command -> ux_host_class_command_class == UX_HOST_CLASS_HUB_CLASS)) |
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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 when the device inserted has found a parent and |
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is ready to complete the enumeration. */ |
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status = _ux_host_class_hub_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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status = _ux_host_class_hub_activate_wait(command); |
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return(status); |
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#endif |
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case UX_HOST_CLASS_COMMAND_DEACTIVATE: |
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/* The deactivate command is used when the device has been extracted either |
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directly or when its parents has been extracted */ |
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status = _ux_host_class_hub_deactivate(command); |
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/* Return completion status. */ |
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return(status); |
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default: |
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/* Error trap. */ |
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_ux_system_error_handler(UX_SYSTEM_LEVEL_THREAD, UX_SYSTEM_CONTEXT_CLASS, UX_FUNCTION_NOT_SUPPORTED); |
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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_ERROR, UX_FUNCTION_NOT_SUPPORTED, 0, 0, 0, UX_TRACE_ERRORS, 0, 0) |
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/* Return error status. */ |
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return(UX_FUNCTION_NOT_SUPPORTED); |
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} |
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} |
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#if defined(UX_HOST_STANDALONE) |
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#define UX_HOST_STACK_ENUM_TRANS_ERROR(t) ( \ |
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(t)->ux_transfer_request_completion_code != UX_SUCCESS || \ |
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(t)->ux_transfer_request_actual_length != \ |
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(t)->ux_transfer_request_requested_length) |
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static inline UINT _ux_host_class_hub_enum_get_status(UX_HOST_CLASS_HUB *hub, UX_TRANSFER *trans) |
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{ |
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hub -> ux_host_class_hub_allocated = _ux_utility_memory_allocate(UX_NO_ALIGN, UX_CACHE_SAFE_MEMORY, 2); |
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if (hub -> ux_host_class_hub_allocated == UX_NULL) |
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return(UX_MEMORY_INSUFFICIENT); |
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trans -> ux_transfer_request_requested_length = 2; |
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trans -> ux_transfer_request_data_pointer = hub -> ux_host_class_hub_allocated; |
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trans -> ux_transfer_request_function = UX_GET_STATUS; |
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trans -> ux_transfer_request_type = UX_REQUEST_IN | UX_REQUEST_TYPE_STANDARD | UX_REQUEST_TARGET_DEVICE; |
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trans -> ux_transfer_request_value = 0; |
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trans -> ux_transfer_request_index = 0; |
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return(UX_SUCCESS); |
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} |
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static inline VOID _ux_host_class_hub_enum_set_config(UX_HOST_CLASS_HUB *hub, UX_TRANSFER *trans, UX_CONFIGURATION *configuration) |
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{ |
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UX_PARAMETER_NOT_USED(hub); |
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trans -> ux_transfer_request_requested_length = 0; |
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trans -> ux_transfer_request_function = UX_SET_CONFIGURATION; |
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trans -> ux_transfer_request_type = UX_REQUEST_OUT | UX_REQUEST_TYPE_STANDARD | UX_REQUEST_TARGET_DEVICE; |
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trans -> ux_transfer_request_value = (USHORT) configuration -> ux_configuration_descriptor.bConfigurationValue; |
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trans -> ux_transfer_request_index = 0; |
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} |
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static inline UINT _ux_host_class_hub_activate_wait(UX_HOST_CLASS_COMMAND *command) |
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{ |
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UX_DEVICE *device; |
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UX_ENDPOINT *ep0; |
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UX_TRANSFER *trans0, *trans; |
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UX_HOST_CLASS_HUB *hub; |
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UINT status; |
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ULONG current_ms, elapsed_ms; |
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/* Get the instance for this class. */ |
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device = (UX_DEVICE *)command -> ux_host_class_command_container; |
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hub = (UX_HOST_CLASS_HUB *) device -> ux_device_class_instance; |
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/* Get endpoint 0 and transfer request. */ |
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ep0 = &device -> ux_device_control_endpoint; |
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trans0 = &ep0 -> ux_endpoint_transfer_request; |
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/* Get current transfer request. */ |
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trans = hub -> ux_host_class_hub_transfer; |
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/* Immediate state change: continue. |
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Wait/pending state : return. */ |
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while(1) |
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{ |
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/* Run initialize state machine. */ |
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switch(hub -> ux_host_class_hub_enum_state) |
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{ |
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case UX_HOST_CLASS_HUB_ENUM_GET_STATUS : |
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status = _ux_host_class_hub_enum_get_status(hub, trans0); |
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if (status != UX_SUCCESS) |
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{ |
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hub -> ux_host_class_hub_enum_state = UX_HOST_CLASS_HUB_ENUM_DONE; |
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hub -> ux_host_class_hub_run_status = status; |
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continue; |
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} |
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UX_TRANSFER_STATE_RESET(trans0); |
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hub -> ux_host_class_hub_transfer = trans0; |
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hub -> ux_host_class_hub_enum_state = UX_HOST_CLASS_HUB_ENUM_TRANS_WAIT; |
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hub -> ux_host_class_hub_next_state = UX_HOST_CLASS_HUB_ENUM_POWER_CHECK; |
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continue; |
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case UX_HOST_CLASS_HUB_ENUM_POWER_CHECK : |
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/* Transfer request error check. */ |
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if (UX_HOST_STACK_ENUM_TRANS_ERROR(trans)) |
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{ |
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hub -> ux_host_class_hub_enum_state = UX_HOST_CLASS_HUB_ENUM_DONE; |
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hub -> ux_host_class_hub_run_status = UX_CONNECTION_INCOMPATIBLE; |
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continue; |
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} |
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/* Save power source setting. */ |
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if (hub -> ux_host_class_hub_allocated[0] & UX_STATUS_DEVICE_SELF_POWERED) |
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device -> ux_device_power_source = UX_DEVICE_SELF_POWERED; |
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else |
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device -> ux_device_power_source = UX_DEVICE_BUS_POWERED; |
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/* Free allocated buffer. */ |
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_ux_utility_memory_free(hub -> ux_host_class_hub_allocated); |
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hub -> ux_host_class_hub_allocated = UX_NULL; |
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#if UX_MAX_DEVICES > 1 |
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/* Check the HUB power source and check the parent power source. */ |
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if (device -> ux_device_power_source == UX_DEVICE_BUS_POWERED) |
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{ |
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/* Check parent power. */ |
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if (device -> ux_device_parent != UX_NULL) |
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{ |
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if (device -> ux_device_parent -> ux_device_power_source == UX_DEVICE_BUS_POWERED) |
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{ |
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hub -> ux_host_class_hub_enum_state = UX_HOST_CLASS_HUB_ENUM_DONE; |
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hub -> ux_host_class_hub_run_status = UX_CONNECTION_INCOMPATIBLE; |
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continue; |
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} |
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} |
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} |
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#endif |
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/* Fall through. */ |
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case UX_HOST_CLASS_HUB_ENUM_SET_CONFIG : |
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_ux_host_class_hub_enum_set_config(hub, trans0, |
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device -> ux_device_first_configuration); |
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UX_TRANSFER_STATE_RESET(trans0); |
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hub -> ux_host_class_hub_transfer = trans0; |
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hub -> ux_host_class_hub_enum_state = UX_HOST_CLASS_HUB_ENUM_TRANS_WAIT; |
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hub -> ux_host_class_hub_next_state = UX_HOST_CLASS_HUB_ENUM_SET_CONFIG_DONE; |
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continue; |
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case UX_HOST_CLASS_HUB_ENUM_SET_CONFIG_DONE : |
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/* Transfer request error check. */ |
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if (UX_HOST_STACK_ENUM_TRANS_ERROR(trans)) |
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{ |
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hub -> ux_host_class_hub_enum_state = UX_HOST_CLASS_HUB_ENUM_DONE; |
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hub -> ux_host_class_hub_run_status = UX_CONNECTION_INCOMPATIBLE; |
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continue; |
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} |
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/* Create configuration instance. */ |
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status = _ux_host_stack_configuration_instance_create(device -> ux_device_first_configuration); |
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if (status != UX_SUCCESS) |
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{ |
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hub -> ux_host_class_hub_enum_state = UX_HOST_CLASS_HUB_ENUM_DONE; |
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hub -> ux_host_class_hub_run_status = status; |
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continue; |
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} |
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/* Change device state. */ |
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device -> ux_device_state = UX_DEVICE_CONFIGURED; |
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device -> ux_device_current_configuration = device -> ux_device_first_configuration; |
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/* Fall through. */ |
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case UX_HOST_CLASS_HUB_ENUM_GET_HUB_DESC : |
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status = _ux_host_class_hub_descriptor_get(hub); |
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if (UX_SUCCESS != status) |
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{ |
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hub -> ux_host_class_hub_enum_state = UX_HOST_CLASS_HUB_ENUM_DONE; |
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hub -> ux_host_class_hub_run_status = status; |
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continue; |
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} |
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/* Request already updated, to transfer state. */ |
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hub -> ux_host_class_hub_enum_state = UX_HOST_CLASS_HUB_ENUM_TRANS_WAIT; |
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hub -> ux_host_class_hub_next_state = UX_HOST_CLASS_HUB_ENUM_GET_HUB_DESC_DONE; |
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continue; |
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case UX_HOST_CLASS_HUB_ENUM_GET_HUB_DESC_DONE: |
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/* Transfer request error check. */ |
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if (UX_HOST_STACK_ENUM_TRANS_ERROR(trans)) |
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{ |
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hub -> ux_host_class_hub_enum_state = UX_HOST_CLASS_HUB_ENUM_DONE; |
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hub -> ux_host_class_hub_run_status = UX_DESCRIPTOR_CORRUPTED; |
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continue; |
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} |
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302 |
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/* Parse descriptor. */ |
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status = _ux_host_class_hub_descriptor_parse(hub, hub -> ux_host_class_hub_allocated); |
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if (status != UX_SUCCESS) |
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{ |
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hub -> ux_host_class_hub_enum_state = UX_HOST_CLASS_HUB_ENUM_DONE; |
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hub -> ux_host_class_hub_run_status = status; |
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continue; |
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} |
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311 |
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/* Free the allocated descriptor. */ |
312 |
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_ux_utility_memory_free(hub -> ux_host_class_hub_allocated); |
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hub -> ux_host_class_hub_allocated = UX_NULL; |
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/* Initialize for port power ON. */ |
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hub -> ux_host_class_hub_run_port = 1; |
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318 |
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/* Fall through. */ |
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case UX_HOST_CLASS_HUB_ENUM_PORT_POWER : |
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/* Prepare for SetPortFeature(POWER). */ |
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status = _ux_host_class_hub_feature(hub, |
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hub -> ux_host_class_hub_run_port, |
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UX_SET_FEATURE, UX_HOST_CLASS_HUB_PORT_POWER); |
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/* Request already updated, to transfer state. */ |
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hub -> ux_host_class_hub_enum_state = UX_HOST_CLASS_HUB_ENUM_TRANS_WAIT; |
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hub -> ux_host_class_hub_next_state = UX_HOST_CLASS_HUB_ENUM_PORT_POWER_DELAY; |
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continue; |
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case UX_HOST_CLASS_HUB_ENUM_PORT_POWER_DELAY : |
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/* Transfer request error check. */ |
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if (UX_HOST_STACK_ENUM_TRANS_ERROR(trans)) |
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{ |
336 |
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337 |
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/* Set the HUB status to not powered. */ |
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hub -> ux_host_class_hub_port_power &= |
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(UINT)~(1u << hub -> ux_host_class_hub_run_port); |
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hub -> ux_host_class_hub_enum_state = UX_HOST_CLASS_HUB_ENUM_PORT_NEXT; |
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continue; |
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} |
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344 |
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/* Delay a while (as described by hub descriptor). */ |
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hub -> ux_host_class_hub_wait_start = _ux_utility_time_get(); |
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hub -> ux_host_class_hub_wait_ms = UX_MS_TO_TICK_NON_ZERO((ULONG)hub -> ux_host_class_hub_descriptor.bPwrOn2PwrGood << 1); |
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hub -> ux_host_class_hub_enum_state = UX_HOST_CLASS_HUB_ENUM_TRANS_WAIT; |
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hub -> ux_host_class_hub_next_state = UX_HOST_CLASS_HUB_ENUM_PORT_POWER_ON; |
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continue; |
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|
|
352 |
|
|
case UX_HOST_CLASS_HUB_ENUM_PORT_POWER_ON: |
353 |
|
|
hub -> ux_host_class_hub_port_power |= (UINT)(1u << hub -> ux_host_class_hub_run_port); |
354 |
|
|
|
355 |
|
|
/* Fall through. */ |
356 |
|
|
case UX_HOST_CLASS_HUB_ENUM_PORT_NEXT : |
357 |
|
|
|
358 |
|
|
/* Check if the last port is powered. */ |
359 |
|
|
if (hub -> ux_host_class_hub_run_port < |
360 |
|
|
hub -> ux_host_class_hub_descriptor.bNbPorts) |
361 |
|
|
{ |
362 |
|
|
|
363 |
|
|
/* Start another port power. */ |
364 |
|
|
hub -> ux_host_class_hub_run_port ++; |
365 |
|
|
hub -> ux_host_class_hub_enum_state = UX_HOST_CLASS_HUB_ENUM_PORT_POWER; |
366 |
|
|
continue; |
367 |
|
|
} |
368 |
|
|
|
369 |
|
|
/* All port is powered. */ |
370 |
|
|
|
371 |
|
|
/* Fall through. */ |
372 |
|
|
case UX_HOST_CLASS_HUB_ENUM_INTERRUPT_START : |
373 |
|
|
status = _ux_host_class_hub_interrupt_endpoint_start(hub); |
374 |
|
|
if (status != UX_SUCCESS) |
375 |
|
|
hub -> ux_host_class_hub_run_status = status; |
376 |
|
|
|
377 |
|
|
/* Fall through. */ |
378 |
|
|
case UX_HOST_CLASS_HUB_ENUM_DONE : |
379 |
|
|
|
380 |
|
|
/* Free buffer allocated while enumerating. */ |
381 |
|
|
if (hub -> ux_host_class_hub_allocated) |
382 |
|
|
{ |
383 |
|
|
_ux_utility_memory_free(hub -> ux_host_class_hub_allocated); |
384 |
|
|
hub -> ux_host_class_hub_allocated = UX_NULL; |
385 |
|
|
} |
386 |
|
|
|
387 |
|
|
/* Error cases. */ |
388 |
|
|
if (hub -> ux_host_class_hub_run_status != UX_SUCCESS) |
389 |
|
|
{ |
390 |
|
|
|
391 |
|
|
/* Unlink from device. */ |
392 |
|
|
device -> ux_device_class_instance = UX_NULL; |
393 |
|
|
|
394 |
|
|
/* Error trap. */ |
395 |
|
|
_ux_system_error_handler(UX_SYSTEM_LEVEL_THREAD, UX_SYSTEM_CONTEXT_CLASS, hub -> ux_host_class_hub_run_status); |
396 |
|
|
|
397 |
|
|
/* If trace is enabled, insert this event into the trace buffer. */ |
398 |
|
|
UX_TRACE_IN_LINE_INSERT(UX_TRACE_ERROR, hub -> ux_host_class_hub_run_status, hub, 0, 0, UX_TRACE_ERRORS, 0, 0) |
399 |
|
|
|
400 |
|
|
/* Free hub. */ |
401 |
|
|
_ux_utility_memory_free(hub); |
402 |
|
|
return(UX_STATE_ERROR); |
403 |
|
|
} |
404 |
|
|
|
405 |
|
|
/* Done success. */ |
406 |
|
|
|
407 |
|
|
/* Create this class instance. */ |
408 |
|
|
_ux_host_stack_class_instance_create(hub -> ux_host_class_hub_class, (VOID *) hub); |
409 |
|
|
|
410 |
|
|
/* Store the instance in the device container, this is for the USBX stack |
411 |
|
|
when it needs to invoke the class. */ |
412 |
|
|
device -> ux_device_class_instance = (VOID *) hub; |
413 |
|
|
|
414 |
|
|
/* Mark the HUB as live now. */ |
415 |
|
|
hub -> ux_host_class_hub_state = UX_HOST_CLASS_INSTANCE_LIVE; |
416 |
|
|
|
417 |
|
|
/* If all is fine and the device is mounted, we may need to inform the application |
418 |
|
|
if a function has been programmed in the system structure. */ |
419 |
|
|
if (_ux_system_host -> ux_system_host_change_function != UX_NULL) |
420 |
|
|
{ |
421 |
|
|
|
422 |
|
|
/* Call system change function. */ |
423 |
|
|
_ux_system_host -> ux_system_host_change_function(UX_DEVICE_INSERTION, hub -> ux_host_class_hub_class, (VOID *) hub); |
424 |
|
|
} |
425 |
|
|
|
426 |
|
|
/* Next state: CHANGE_CHECK. */ |
427 |
|
|
hub -> ux_host_class_hub_enum_state = UX_STATE_IDLE; |
428 |
|
|
hub -> ux_host_class_hub_run_state = UX_HOST_CLASS_HUB_CHANGE_CHECK; |
429 |
|
|
hub -> ux_host_class_hub_run_port = 0; |
430 |
|
|
|
431 |
|
|
/* Done activate. */ |
432 |
|
|
return(UX_STATE_NEXT); |
433 |
|
|
|
434 |
|
|
case UX_HOST_CLASS_HUB_ENUM_TRANS_WAIT: |
435 |
|
|
|
436 |
|
|
/* Poll transfer task. */ |
437 |
|
|
status = _ux_host_stack_transfer_run(hub -> ux_host_class_hub_transfer); |
438 |
|
|
hub -> ux_host_class_hub_run_status = hub -> ux_host_class_hub_transfer -> |
439 |
|
|
ux_transfer_request_completion_code; |
440 |
|
|
|
441 |
|
|
/* Transfer done - next state. */ |
442 |
|
|
if (status == UX_STATE_NEXT || status == UX_STATE_IDLE) |
443 |
|
|
{ |
444 |
|
|
hub -> ux_host_class_hub_enum_state = hub -> ux_host_class_hub_next_state; |
445 |
|
|
continue; |
446 |
|
|
} |
447 |
|
|
|
448 |
|
|
/* Check error. */ |
449 |
|
|
if (status < UX_STATE_NEXT) |
450 |
|
|
{ |
451 |
|
|
|
452 |
|
|
/* Fail. */ |
453 |
|
|
hub -> ux_host_class_hub_enum_state = UX_HOST_CLASS_HUB_ENUM_DONE; |
454 |
|
|
continue; |
455 |
|
|
} |
456 |
|
|
|
457 |
|
|
/* Transfer in progress, wait. */ |
458 |
|
|
return(UX_STATE_WAIT); |
459 |
|
|
|
460 |
|
|
case UX_HOST_CLASS_HUB_ENUM_DELAY_WAIT: |
461 |
|
|
current_ms = _ux_utility_time_get(); |
462 |
|
|
elapsed_ms = _ux_utility_time_elapsed(current_ms, |
463 |
|
|
hub -> ux_host_class_hub_wait_start); |
464 |
|
|
if (elapsed_ms < hub -> ux_host_class_hub_wait_ms) |
465 |
|
|
{ |
466 |
|
|
|
467 |
|
|
/* Keep waiting. */ |
468 |
|
|
return(UX_STATE_WAIT); |
469 |
|
|
} |
470 |
|
|
|
471 |
|
|
/* Next state. */ |
472 |
|
|
hub -> ux_host_class_hub_enum_state = hub -> ux_host_class_hub_next_state; |
473 |
|
|
continue; |
474 |
|
|
|
475 |
|
|
default: |
476 |
|
|
return(UX_STATE_NEXT); |
477 |
|
|
} |
478 |
|
|
} |
479 |
|
|
} |
480 |
|
|
#endif |