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/***************************************************************************
* 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 */
/** */
/** Pima Class */
/** */
/**************************************************************************/
/**************************************************************************/
/* Include necessary system files. */
#define UX_SOURCE_CODE
#include "ux_api.h"
#include "ux_host_class_pima.h"
#include "ux_host_stack.h"
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _ux_host_class_pima_write PORTABLE C */
/* 6.1.10 */
/* AUTHOR */
/* */
/* Chaoqiong Xiao, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function writes a data payload to the Pima device. This */
/* function first write a header followed by some data. */
/* */
/* INPUT */
/* */
/* pima Pointer to pima class */
/* data_pointer Pointer to data to write */
/* data_length Length of data to write */
/* operation_code Code to send in header (this */
/* is from the command block */
/* max_payload_data Maximum data sent in one load */
/* */
/* OUTPUT */
/* */
/* Completion Status */
/* */
/* CALLS */
/* */
/* _ux_host_stack_transfer_request Process transfer request */
/* _ux_host_stack_transfer_request_abort Abort transfer request */
/* _ux_host_stack_endpoint_reset Reset endpoint */
/* _ux_utility_memory_copy Copy memory */
/* _ux_host_semaphore_get Get protection semaphore */
/* _ux_utility_long_put Put a long 32 bit value */
/* _ux_utility_short_put Put a short 16 bit value */
/* */
/* CALLED BY */
/* */
/* Application */
/* */
/**************************************************************************/
UINT _ux_host_class_pima_write(UX_HOST_CLASS_PIMA *pima, UCHAR *data_pointer,
ULONG data_length,
ULONG operation_code,
ULONG max_payload_length)
{
UX_TRANSFER *transfer_request;
UINT status;
UCHAR *ptp_payload;
ULONG requested_length;
ULONG payload_length;
UX_PARAMETER_NOT_USED(operation_code);
/* If trace is enabled, insert this event into the trace buffer. */
UX_TRACE_IN_LINE_INSERT(UX_TRACE_HOST_CLASS_PIMA_WRITE, pima, data_pointer, data_length, 0, UX_TRACE_HOST_CLASS_EVENTS, 0, 0)
/* We use the Bulk Out pipe for receiving data .. */
transfer_request = &pima -> ux_host_class_pima_bulk_out_endpoint -> ux_endpoint_transfer_request;
/* Get the pointer to the ptp payload. */
ptp_payload = pima -> ux_host_class_pima_container ;
/* Initialize the transfer_request. */
transfer_request -> ux_transfer_request_data_pointer = ptp_payload;
/* Fill in the header values. Start with the length of the container. */
_ux_utility_long_put(ptp_payload + UX_HOST_CLASS_PIMA_DATA_HEADER_LENGTH, data_length + UX_HOST_CLASS_PIMA_DATA_HEADER_SIZE);
/* Check for remainder in last packet. */
if (((data_length + UX_HOST_CLASS_PIMA_DATA_HEADER_SIZE) % pima -> ux_host_class_pima_bulk_out_endpoint -> ux_endpoint_descriptor.wMaxPacketSize) == 0)
/* We have a ZLP condition on a OUT. */
pima -> ux_host_class_pima_zlp_flag = UX_HOST_CLASS_PIMA_ZLP_OUT;
else
/* Do not expect a ZLP. */
pima -> ux_host_class_pima_zlp_flag = UX_HOST_CLASS_PIMA_ZLP_NONE;
/* Container type is a data type. */
*(ptp_payload + UX_HOST_CLASS_PIMA_DATA_HEADER_TYPE) = UX_HOST_CLASS_PIMA_CT_DATA_BLOCK;
/* Put the operation code. */
*(ptp_payload + UX_HOST_CLASS_PIMA_DATA_HEADER_CODE) = (UCHAR)pima -> ux_host_class_pima_operation_code;
/* Store the transaction ID. */
_ux_utility_long_put(ptp_payload + UX_HOST_CLASS_PIMA_DATA_HEADER_TRANSACTION_ID,
pima -> ux_host_class_pima_transaction_id);
/* Calculate the requested length in the first container. */
requested_length = data_length + UX_HOST_CLASS_PIMA_DATA_HEADER_SIZE;
/* Can we fill the container ? */
if(requested_length > UX_HOST_CLASS_PIMA_CONTAINER_SIZE)
/* We have more data in the payload than the first container so adjust the length. */
requested_length = UX_HOST_CLASS_PIMA_CONTAINER_SIZE;
/* Add the data payload to fill that container. */
_ux_utility_memory_copy(ptp_payload + UX_HOST_CLASS_PIMA_DATA_HEADER_SIZE, data_pointer,
requested_length - UX_HOST_CLASS_PIMA_DATA_HEADER_SIZE); /* Use case of memcpy is verified. */
/* Initialize the transfer of that container. */
transfer_request -> ux_transfer_request_requested_length = requested_length;
/* Send request to HCD layer. */
status = _ux_host_stack_transfer_request(transfer_request);
/* If the transfer is successful, we need to wait for the transfer request to be completed. */
if (status == UX_SUCCESS)
{
/* Wait for the completion of the transfer request. */
status = _ux_host_semaphore_get(&transfer_request -> ux_transfer_request_semaphore, UX_MS_TO_TICK(UX_HOST_CLASS_PIMA_CLASS_TRANSFER_TIMEOUT));
/* If the semaphore did not succeed we probably have a time out. */
if (status != UX_SUCCESS)
{
/* All transfers pending need to abort. There may have been a partial transfer. */
_ux_host_stack_transfer_request_abort(transfer_request);
/* The endpoint was halted by a transfer error and needs to be reset. */
_ux_host_stack_endpoint_reset(pima -> ux_host_class_pima_bulk_in_endpoint);
/* The endpoint was halted by a transfer error and needs to be reset. */
_ux_host_stack_endpoint_reset(pima -> ux_host_class_pima_bulk_out_endpoint);
/* There was an error, return to the caller. */
return(status);
}
}
else
{
/* There was a non transfer error, no partial transfer to be checked */
return(status);
}
/* Isolate the length of the data payload that still needs to be sent. */
data_length -= (requested_length - UX_HOST_CLASS_PIMA_DATA_HEADER_SIZE);
/* Adjust the data payload pointer. */
data_pointer += (requested_length - UX_HOST_CLASS_PIMA_DATA_HEADER_SIZE);
/* Now we can send the data to the device. */
while(data_length)
{
/* Check if need to split the data payload into smaller packets. */
if (data_length > max_payload_length)
/* We cannot send everything in this payload. */
payload_length = max_payload_length;
else
/* Either this is the last packet or we we have a small packet to send. */
payload_length = data_length;
/* Initialize the transfer_request. */
transfer_request -> ux_transfer_request_data_pointer = data_pointer;
transfer_request -> ux_transfer_request_requested_length = payload_length;
/* Send request to HCD layer. */
status = _ux_host_stack_transfer_request(transfer_request);
/* If the transfer is successful, we need to wait for the transfer request to be completed. */
if (status == UX_SUCCESS)
{
/* Wait for the completion of the transfer request. */
status = _ux_host_semaphore_get(&transfer_request -> ux_transfer_request_semaphore, UX_MS_TO_TICK(UX_HOST_CLASS_PIMA_CLASS_TRANSFER_TIMEOUT));
/* If the semaphore did not succeed we probably have a time out. */
if (status != UX_SUCCESS)
{
/* All transfers pending need to abort. There may have been a partial transfer. */
_ux_host_stack_transfer_request_abort(transfer_request);
/* The endpoint was halted by a transfer error and needs to be reset. */
_ux_host_stack_endpoint_reset(pima -> ux_host_class_pima_bulk_in_endpoint);
/* The endpoint was halted by a transfer error and needs to be reset. */
_ux_host_stack_endpoint_reset(pima -> ux_host_class_pima_bulk_out_endpoint);
/* There was an error, return to the caller. */
return(status);
}
}
else
{
/* There was a non transfer error, no partial transfer to be checked */
return(status);
}
/* Check for completion of transfer. If the transfer is partial, return to caller.
Partial transfer is not OK. */
if (payload_length != transfer_request -> ux_transfer_request_actual_length)
return(UX_TRANSFER_ERROR);
/* Adjust the total length to transfer. */
data_length -= payload_length;
/* Adjust the data pointer. */
data_pointer += payload_length;
}
/* If we have a ZLP condition, write the device one more time with a zero packet. */
if (pima -> ux_host_class_pima_zlp_flag == UX_HOST_CLASS_PIMA_ZLP_OUT)
{
/* Initialize the transfer_request. */
transfer_request -> ux_transfer_request_data_pointer = UX_NULL;
transfer_request -> ux_transfer_request_requested_length = 0;
/* Send request to HCD layer. */
status = _ux_host_stack_transfer_request(transfer_request);
/* If the transfer is successful, we need to wait for the transfer request to be completed. */
if (status == UX_SUCCESS)
{
/* Wait for the completion of the transfer request. */
status = _ux_host_semaphore_get(&transfer_request -> ux_transfer_request_semaphore, UX_MS_TO_TICK(UX_HOST_CLASS_PIMA_CLASS_TRANSFER_TIMEOUT));
/* If the semaphore did not succeed we probably have a time out. */
if (status != UX_SUCCESS)
{
/* All transfers pending need to abort. There may have been a partial transfer. */
_ux_host_stack_transfer_request_abort(transfer_request);
/* The endpoint was halted by a transfer error and needs to be reset. */
_ux_host_stack_endpoint_reset(pima -> ux_host_class_pima_bulk_in_endpoint);
/* The endpoint was halted by a transfer error and needs to be reset. */
_ux_host_stack_endpoint_reset(pima -> ux_host_class_pima_bulk_out_endpoint);
/* There was an error, return to the caller. */
return(status);
}
/* Reset the ZLP. */
pima -> ux_host_class_pima_zlp_flag = UX_HOST_CLASS_PIMA_ZLP_NONE;
}
}
/* We have finished receiving the data. */
return(UX_SUCCESS);
}
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