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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 */
/** */
/** Device Storage Class */
/** */
/**************************************************************************/
/**************************************************************************/
#define UX_SOURCE_CODE
/* Include necessary system files. */
#include "ux_api.h"
#include "ux_device_class_storage.h"
#include "ux_device_stack.h"
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _ux_device_class_storage_write PORTABLE C */
/* 6.1.10 */
/* AUTHOR */
/* */
/* Chaoqiong Xiao, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function performs a WRITE command in 32 or 16 bits. */
/* */
/* INPUT */
/* */
/* storage Pointer to storage class */
/* lun Logical unit number */
/* endpoint_in Pointer to IN endpoint */
/* endpoint_out Pointer to OUT endpoint */
/* cbwcb Pointer to the CBWCB */
/* scsi_command SCSI command */
/* */
/* OUTPUT */
/* */
/* Completion Status */
/* */
/* CALLS */
/* */
/* (ux_slave_class_storage_media_status) Get media status */
/* (ux_slave_class_storage_media_write) Write to media */
/* _ux_device_stack_endpoint_stall Stall endpoint */
/* _ux_device_stack_transfer_request Transfer request */
/* _ux_utility_long_get_big_endian Get 32-bit big endian */
/* _ux_utility_short_get_big_endian Get 16-bit big endian */
/* */
/* CALLED BY */
/* */
/* Device Storage Class */
/* */
/**************************************************************************/
UINT _ux_device_class_storage_write(UX_SLAVE_CLASS_STORAGE *storage, ULONG lun,
UX_SLAVE_ENDPOINT *endpoint_in,
UX_SLAVE_ENDPOINT *endpoint_out, UCHAR * cbwcb, UCHAR scsi_command)
{
UINT status;
UX_SLAVE_TRANSFER *transfer_request;
ULONG lba;
ULONG total_number_blocks;
ULONG media_status;
ULONG total_length;
#if !defined(UX_DEVICE_STANDALONE)
ULONG number_blocks;
ULONG transfer_length;
ULONG done_length;
#endif
UX_PARAMETER_NOT_USED(endpoint_in);
if (storage -> ux_slave_class_storage_lun[lun].ux_slave_class_storage_medium_loaded_status == 0)
{
/* Media not loaded. Set NOT READY sense code. */
storage -> ux_slave_class_storage_lun[lun].ux_slave_class_storage_request_sense_status =
UX_DEVICE_CLASS_STORAGE_SENSE_STATUS(UX_SLAVE_CLASS_STORAGE_SENSE_KEY_NOT_READY,
UX_SLAVE_CLASS_STORAGE_SENSE_CODE_NOT_PRESENT, 0x00);
/* Return CSW with failure. */
storage -> ux_slave_class_storage_csw_status = UX_SLAVE_CLASS_STORAGE_CSW_FAILED;
/* Return completion status. */
return(UX_SUCCESS);
}
/* Get the LBA from the CBWCB. */
lba = _ux_utility_long_get_big_endian(cbwcb + UX_SLAVE_CLASS_STORAGE_WRITE_LBA);
/* The type of commands will tell us the width of the field containing the number
of sectors to read. */
if (scsi_command == UX_SLAVE_CLASS_STORAGE_SCSI_WRITE16)
/* Get the number of blocks from the CBWCB in 16 bits. */
total_number_blocks = _ux_utility_short_get_big_endian(cbwcb + UX_SLAVE_CLASS_STORAGE_WRITE_TRANSFER_LENGTH_16);
else
/* Get the number of blocks from the CBWCB in 32 bits. */
total_number_blocks = _ux_utility_long_get_big_endian(cbwcb + UX_SLAVE_CLASS_STORAGE_WRITE_TRANSFER_LENGTH_32);
/* If trace is enabled, insert this event into the trace buffer. */
UX_TRACE_IN_LINE_INSERT(UX_TRACE_DEVICE_CLASS_STORAGE_WRITE, storage, lun, lba, total_number_blocks, UX_TRACE_DEVICE_CLASS_EVENTS, 0, 0)
/* Obtain the pointer to the transfer request. */
transfer_request = &endpoint_out -> ux_slave_endpoint_transfer_request;
/* Obtain the status of the device. */
status = storage -> ux_slave_class_storage_lun[lun].ux_slave_class_storage_media_status(storage,
lun, storage -> ux_slave_class_storage_lun[lun].ux_slave_class_storage_media_id, &media_status);
/* Update the request sense. */
storage -> ux_slave_class_storage_lun[lun].ux_slave_class_storage_request_sense_status = media_status;
/* Default CSW to failed. */
storage -> ux_slave_class_storage_csw_status = UX_SLAVE_CLASS_STORAGE_CSW_FAILED;
/* If there is a problem, return a failed command. */
if (status != UX_SUCCESS)
{
/* We have a problem, media status error. Return a bad completion and wait for the
REQUEST_SENSE command. */
#if !defined(UX_DEVICE_STANDALONE)
_ux_device_stack_endpoint_stall(endpoint_out);
#endif
/* We are done here. */
return(UX_ERROR);
}
/* Check Read Only flag. */
if (storage -> ux_slave_class_storage_lun[lun].ux_slave_class_storage_media_read_only_flag == UX_TRUE)
{
/* Update the request sense. */
storage -> ux_slave_class_storage_lun[lun].ux_slave_class_storage_request_sense_status =
UX_DEVICE_CLASS_STORAGE_SENSE_STATUS(UX_SLAVE_CLASS_STORAGE_SENSE_KEY_DATA_PROTECT,
UX_SLAVE_CLASS_STORAGE_REQUEST_CODE_MEDIA_PROTECTED,0);
/* We have a problem, cannot write to RO drive. Return a bad completion and wait for the
REQUEST_SENSE command. */
#if !defined(UX_DEVICE_STANDALONE)
_ux_device_stack_endpoint_stall(endpoint_out);
#endif
/* We are done here. */
return(UX_ERROR);
}
/* Compute the total length to transfer and how much remains. */
total_length = total_number_blocks * storage -> ux_slave_class_storage_lun[lun].ux_slave_class_storage_media_block_length;
#if defined(UX_DEVICE_STANDALONE)
/* Next: Transfer (DATA) -> Disk write. */
storage -> ux_device_class_storage_state = UX_DEVICE_CLASS_STORAGE_STATE_TRANS_START;
storage -> ux_device_class_storage_cmd_state = UX_DEVICE_CLASS_STORAGE_CMD_WRITE;
storage -> ux_device_class_storage_disk_state = UX_DEVICE_CLASS_STORAGE_DISK_USB_WAIT;
storage -> ux_device_class_storage_buffer_state[0] = UX_DEVICE_CLASS_STORAGE_BUFFER_EMPTY;
storage -> ux_device_class_storage_buffer_state[1] = UX_DEVICE_CLASS_STORAGE_BUFFER_EMPTY;
storage -> ux_device_class_storage_buffer_usb = 0;
storage -> ux_device_class_storage_buffer_disk = 0;
storage -> ux_device_class_storage_transfer = transfer_request;
storage -> ux_device_class_storage_device_length = total_length;
storage -> ux_device_class_storage_data_length = total_length;
storage -> ux_device_class_storage_data_count = 0;
storage -> ux_device_class_storage_cmd_lba = lba;
storage -> ux_device_class_storage_cmd_n_lb = total_number_blocks;
#else
/* Check transfer length. */
/* Case (3) Hn < Do. */
if (total_length > storage -> ux_slave_class_storage_host_length)
{
_ux_device_stack_endpoint_stall(endpoint_out);
storage -> ux_slave_class_storage_csw_status = UX_SLAVE_CLASS_STORAGE_CSW_PHASE_ERROR;
return(UX_ERROR);
}
/* Case (8). Hi <> Do. */
if ((storage -> ux_slave_class_storage_cbw_flags & 0x80) != 0)
{
_ux_device_stack_endpoint_stall(endpoint_in);
storage -> ux_slave_class_storage_csw_status = UX_SLAVE_CLASS_STORAGE_CSW_PHASE_ERROR;
return(UX_ERROR);
}
/* Default status to success. */
status = UX_SUCCESS;
/* It may take several transfers to send the requested data. */
done_length = 0;
while (total_length)
{
/* How much can we receive in this transfer? */
if (total_length > UX_SLAVE_CLASS_STORAGE_BUFFER_SIZE)
transfer_length = UX_SLAVE_CLASS_STORAGE_BUFFER_SIZE;
else
transfer_length = total_length;
/* Get the data payload from the host. */
status = _ux_device_stack_transfer_request(transfer_request, transfer_length, transfer_length);
/* Check the status. */
if (status != UX_SUCCESS)
{
/* We have a problem, request error. Return a bad completion and wait for the
REQUEST_SENSE command. */
_ux_device_stack_endpoint_stall(endpoint_out);
/* Update residue. */
storage -> ux_slave_class_storage_csw_residue = storage -> ux_slave_class_storage_host_length - done_length;
/* And update the REQUEST_SENSE codes. */
storage -> ux_slave_class_storage_lun[lun].ux_slave_class_storage_request_sense_status =
UX_DEVICE_CLASS_STORAGE_SENSE_STATUS(0x02,0x54,0x00);
/* Return an error. */
return(UX_ERROR);
}
/* Compute the number of blocks to transfer. */
number_blocks = transfer_length / storage -> ux_slave_class_storage_lun[lun].ux_slave_class_storage_media_block_length;
/* Execute the write command to the local media. */
status = storage -> ux_slave_class_storage_lun[lun].ux_slave_class_storage_media_write(storage, lun, transfer_request -> ux_slave_transfer_request_data_pointer, number_blocks, lba, &media_status);
/* If there is a problem, return a failed command. */
if (status != UX_SUCCESS)
{
/* We have a problem, request error. Return a bad completion and wait for the
REQUEST_SENSE command. */
_ux_device_stack_endpoint_stall(endpoint_out);
/* Update residue. */
storage -> ux_slave_class_storage_csw_residue = storage -> ux_slave_class_storage_host_length - done_length;
/* And update the REQUEST_SENSE codes. */
storage -> ux_slave_class_storage_lun[lun].ux_slave_class_storage_request_sense_status = media_status;
/* Return an error. */
return(UX_ERROR);
}
/* Update the lba. */
lba += number_blocks;
/* Update the length to remain. */
total_length -= transfer_length;
done_length += transfer_length;
}
/* Update residue. */
storage -> ux_slave_class_storage_csw_residue = storage -> ux_slave_class_storage_host_length - done_length;
/* Case (9), (11). If host expects more transfer, stall it. */
if (storage -> ux_slave_class_storage_csw_residue)
_ux_device_stack_endpoint_stall(endpoint_out);
#endif /* else defined(UX_DEVICE_STANDALONE) */
/* Now we set the CSW with success. */
storage -> ux_slave_class_storage_csw_status = UX_SLAVE_CLASS_STORAGE_CSW_PASSED;
/* Return completion status. */
return(status);
}
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