/*************************************************************************** * Copyright (c) 2024 Microsoft Corporation * Copyright (c) 2026-present Eclipse ThreadX contributors * * This program and the accompanying materials are made available under the * terms of the MIT License which is available at * https://opensource.org/licenses/MIT. * * SPDX-License-Identifier: MIT **************************************************************************/ /**************************************************************************/ /**************************************************************************/ /** */ /** USBX Component */ /** */ /** Device DPUMP Class */ /** */ /**************************************************************************/ /**************************************************************************/ #define UX_SOURCE_CODE /* Include necessary system files. */ #include "ux_api.h" #include "ux_device_class_dpump.h" #include "ux_device_stack.h" #if defined(UX_DEVICE_STANDALONE) #define UX_DEVICE_CLASS_DPUMP_WRITE_START (UX_STATE_STEP + 1) #define UX_DEVICE_CLASS_DPUMP_WRITE_WAIT (UX_STATE_STEP + 2) /**************************************************************************/ /* */ /* FUNCTION RELEASE */ /* */ /* _ux_device_class_dpump_write_run PORTABLE C */ /* 6.3.0 */ /* AUTHOR */ /* */ /* Chaoqiong Xiao, Microsoft Corporation */ /* */ /* DESCRIPTION */ /* */ /* This function writes to the DPUMP class. */ /* */ /* It's for standalone mode. */ /* */ /* INPUT */ /* */ /* dpump DPUMP class instance */ /* buffer Buffer data to write */ /* requested_length Bytes to write */ /* actual_length Bytes written */ /* */ /* OUTPUT */ /* */ /* State machine Status to check */ /* UX_STATE_NEXT Transfer done, to next state */ /* UX_STATE_EXIT Abnormal, to reset state */ /* (others) Keep running, waiting */ /* */ /* CALLS */ /* */ /* _ux_device_stack_transfer_request Request transfer */ /* _ux_utility_memory_copy Copy memory */ /* */ /* CALLED BY */ /* */ /* Application */ /* */ /**************************************************************************/ UINT _ux_device_class_dpump_write_run(UX_SLAVE_CLASS_DPUMP *dpump, UCHAR *buffer, ULONG requested_length, ULONG *actual_length) { UX_SLAVE_ENDPOINT *endpoint; UX_SLAVE_DEVICE *device; UX_SLAVE_TRANSFER *transfer_request; UINT status; UINT zlp = UX_FALSE; UINT read_state; /* If trace is enabled, insert this event into the trace buffer. */ UX_TRACE_IN_LINE_INSERT(UX_TRACE_DEVICE_CLASS_DPUMP_WRITE, dpump, buffer, requested_length, 0, UX_TRACE_DEVICE_CLASS_EVENTS, 0, 0) /* Get the pointer to the device. */ device = &_ux_system_slave -> ux_system_slave_device; /* As long as the device is in the CONFIGURED state. */ if (device -> ux_slave_device_state != UX_DEVICE_CONFIGURED) { /* Error trap. */ _ux_system_error_handler(UX_SYSTEM_LEVEL_THREAD, UX_SYSTEM_CONTEXT_CLASS, UX_CONFIGURATION_HANDLE_UNKNOWN); /* If trace is enabled, insert this event into the trace buffer. */ UX_TRACE_IN_LINE_INSERT(UX_TRACE_ERROR, UX_CONFIGURATION_HANDLE_UNKNOWN, device, 0, 0, UX_TRACE_ERRORS, 0, 0) /* Cannot proceed with command, the interface is down. */ dpump -> ux_device_class_dpump_write_state = UX_STATE_RESET; dpump -> ux_device_class_dpump_write_status = UX_CONFIGURATION_HANDLE_UNKNOWN; return(UX_STATE_EXIT); } /* Locate the OUT endpoint. */ endpoint = dpump -> ux_slave_class_dpump_bulkin_endpoint; /* Check endpoint. If NULL, we have not yet received the proper SET_INTERFACE command. */ if (endpoint == UX_NULL) { /* Error trap. */ _ux_system_error_handler(UX_SYSTEM_LEVEL_THREAD, UX_SYSTEM_CONTEXT_CLASS, UX_ENDPOINT_HANDLE_UNKNOWN); dpump -> ux_device_class_dpump_write_state = UX_STATE_RESET; dpump -> ux_device_class_dpump_write_status = UX_ENDPOINT_HANDLE_UNKNOWN; return(UX_STATE_EXIT); } /* All DPUMP reading are on the endpoint OUT, from the host. */ transfer_request = &endpoint -> ux_slave_endpoint_transfer_request; /* Handle state cases. */ read_state = dpump -> ux_device_class_dpump_write_state; switch(read_state) { case UX_STATE_RESET: dpump -> ux_device_class_dpump_write_state = UX_DEVICE_CLASS_DPUMP_WRITE_START; dpump -> ux_device_class_dpump_write_status = UX_TRANSFER_NO_ANSWER; dpump -> ux_device_class_dpump_write_buffer = buffer; dpump -> ux_device_class_dpump_write_requested_length = requested_length; dpump -> ux_device_class_dpump_write_actual_length = 0; if (requested_length == 0) zlp = UX_TRUE; /* Fall through. */ case UX_DEVICE_CLASS_DPUMP_WRITE_START: /* Get remaining requested length. */ requested_length = dpump -> ux_device_class_dpump_write_requested_length - dpump -> ux_device_class_dpump_write_actual_length; /* There is no remaining, we are done. */ if (requested_length == 0 && !zlp) { *actual_length = dpump -> ux_device_class_dpump_write_actual_length; dpump -> ux_device_class_dpump_write_state = UX_STATE_RESET; dpump -> ux_device_class_dpump_write_status = UX_SUCCESS; return(UX_STATE_NEXT); } /* Check if we have enough in the local buffer. */ if (requested_length > UX_DEVICE_CLASS_DPUMP_WRITE_BUFFER_SIZE) /* We have too much to transfer. */ dpump -> ux_device_class_dpump_write_transfer_length = UX_DEVICE_CLASS_DPUMP_WRITE_BUFFER_SIZE; else /* We can proceed with the demanded length. */ dpump -> ux_device_class_dpump_write_transfer_length = requested_length; /* On a out, we copy the buffer to the caller. Not very efficient but it makes the API easier. */ _ux_utility_memory_copy(transfer_request -> ux_slave_transfer_request_data_pointer, dpump -> ux_device_class_dpump_write_buffer, dpump -> ux_device_class_dpump_write_transfer_length); /* Use case of memcpy is verified. */ /* Next state. */ dpump -> ux_device_class_dpump_write_state = UX_DEVICE_CLASS_DPUMP_WRITE_WAIT; UX_SLAVE_TRANSFER_STATE_RESET(transfer_request); /* Fall through. */ case UX_DEVICE_CLASS_DPUMP_WRITE_WAIT: /* Send the request to the device controller. */ status = _ux_device_stack_transfer_run(transfer_request, dpump -> ux_device_class_dpump_write_transfer_length, dpump -> ux_device_class_dpump_write_transfer_length); /* Error case. */ if (status < UX_STATE_NEXT) { dpump -> ux_device_class_dpump_write_state = UX_STATE_RESET; dpump -> ux_device_class_dpump_write_status = transfer_request -> ux_slave_transfer_request_completion_code; return(UX_STATE_EXIT); } /* Success case. */ if (status == UX_STATE_NEXT) { /* Next buffer address. */ dpump -> ux_device_class_dpump_write_buffer += transfer_request -> ux_slave_transfer_request_actual_length; /* Set the length actually received. */ dpump -> ux_device_class_dpump_write_actual_length += transfer_request -> ux_slave_transfer_request_actual_length; /* Last transfer status. */ dpump -> ux_device_class_dpump_write_status = transfer_request -> ux_slave_transfer_request_completion_code; /* Update actual length. */ *actual_length = dpump -> ux_device_class_dpump_write_actual_length; /* Check ZLP case. */ if (dpump -> ux_device_class_dpump_write_requested_length == 0) { dpump -> ux_device_class_dpump_write_state = UX_STATE_RESET; return(UX_STATE_NEXT); } /* Next state. */ dpump -> ux_device_class_dpump_write_state = UX_DEVICE_CLASS_DPUMP_WRITE_START; } /* Keep waiting. */ return(UX_STATE_WAIT); default: /* Error. */ dpump -> ux_device_class_dpump_write_state = UX_STATE_RESET; break; } /* Error case. */ return(UX_STATE_EXIT); } #endif