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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"
#if UX_SLAVE_CLASS_STORAGE_BUFFER_SIZE < 20
/* #error UX_SLAVE_CLASS_STORAGE_BUFFER_SIZE too small, please check */
/* Build option checked runtime by UX_ASSERT */
#endif
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _ux_device_class_storage_read_toc PORTABLE C */
/* 6.3.0 */
/* AUTHOR */
/* */
/* Chaoqiong Xiao, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function performs a READ_TOC SCSI command. This is only for */
/* supporting CD-ROM emulation and is hardwired to what Windows wants. */
/* */
/* INPUT */
/* */
/* storage Pointer to storage class */
/* endpoint_in Pointer to IN endpoint */
/* endpoint_out Pointer to OUT endpoint */
/* cbwcb Pointer to CBWCB */
/* */
/* OUTPUT */
/* */
/* Completion Status */
/* */
/* CALLS */
/* */
/* _ux_device_stack_transfer_request Transfer request */
/* _ux_device_class_storage_csw_send Send CSW */
/* _ux_utility_memory_set Set memory */
/* _ux_utility_memory_copy Copy memory */
/* _ux_utility_short_get_big_endian Get 16-bit big endian */
/* */
/* CALLED BY */
/* */
/* Device Storage Class */
/* */
/**************************************************************************/
UINT _ux_device_class_storage_read_toc(UX_SLAVE_CLASS_STORAGE *storage, ULONG lun,
UX_SLAVE_ENDPOINT *endpoint_in,
UX_SLAVE_ENDPOINT *endpoint_out, UCHAR * cbwcb)
{
UINT status;
UX_SLAVE_TRANSFER *transfer_request;
ULONG allocation_length;
ULONG toc_length;
UCHAR *toc_buffer;
UX_PARAMETER_NOT_USED(lun);
UX_PARAMETER_NOT_USED(endpoint_out);
/* Build option check. */
UX_ASSERT(UX_SLAVE_CLASS_STORAGE_BUFFER_SIZE >= 20);
/* If trace is enabled, insert this event into the trace buffer. */
UX_TRACE_IN_LINE_INSERT(UX_TRACE_DEVICE_CLASS_STORAGE_READ_TOC, storage, lun, 0, 0, UX_TRACE_DEVICE_CLASS_EVENTS, 0, 0)
/* Obtain the pointer to the transfer request. */
transfer_request = &endpoint_in -> ux_slave_endpoint_transfer_request;
/* Obtain TOC buffer. */
toc_buffer = transfer_request -> ux_slave_transfer_request_data_pointer;
/* Reset this buffer. */
_ux_utility_memory_set(toc_buffer,0,20); /* Use case of memset is verified. */
/* Get the allocation length. */
allocation_length = _ux_utility_short_get_big_endian(cbwcb + UX_SLAVE_CLASS_STORAGE_READ_TOC_ALLOCATION_LENGTH);
/* Insert the fist and last tack number. */
toc_buffer[2] = 0x01;
toc_buffer[3] = 0x01;
/* Set TOC length by default. */
toc_length = 20;
/* Insert the ADR and control values. */
toc_buffer[5] = 0x14;
/* Insert the TOC tack number. */
toc_buffer[6] = 0x01;
/* Check if the request is for the TOC or time stamp. */
switch (*(cbwcb + UX_SLAVE_CLASS_STORAGE_READ_TOC_FORMAT))
{
case 0x02 :
/* Set the toc buffer length. */
toc_length = 20;
/* Insert the TOC buffer length. */
toc_buffer[1] = 0x12;
/* Insert some time values. */
toc_buffer[10] = 0x02;
toc_buffer[13] = 0x17;
toc_buffer[14] = 0xAA;
toc_buffer[18] = 0x04;
toc_buffer[19] = 0x1a;
break;
case 0x01 :
/* Set the toc buffer length. */
toc_length = 19;
/* Insert the TOC buffer length. */
toc_buffer[1] = 0x12;
toc_buffer[13] = 0x17;
toc_buffer[14] = 0xAA;
toc_buffer[19] = 0xb0;
break;
case 0x00 :
/* Set the toc buffer length. */
toc_length = 20;
/* Insert the TOC buffer length. */
toc_buffer[1] = 0x12;
/* Insert some time values. */
toc_buffer[10] = 0x02;
toc_buffer[13] = 0x17;
toc_buffer[14] = 0xAA;
toc_buffer[18] = 0x04;
toc_buffer[19] = 0x1a;
break;
}
/* Check how much we can send back. */
if (allocation_length > toc_length)
/* We return less than demanded. */
allocation_length = toc_length;
#if defined(UX_DEVICE_STANDALONE)
/* Next: Transfer (DATA). */
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_READ;
storage -> ux_device_class_storage_transfer = transfer_request;
storage -> ux_device_class_storage_device_length = allocation_length;
storage -> ux_device_class_storage_data_length = allocation_length;
storage -> ux_device_class_storage_data_count = 0;
#else
/* Send a data payload with the TOC response buffer. */
_ux_device_stack_transfer_request(transfer_request, allocation_length, allocation_length);
#endif
/* Now we set the CSW with success. */
storage -> ux_slave_class_storage_csw_status = UX_SLAVE_CLASS_STORAGE_CSW_PASSED;
status = UX_SUCCESS;
/* Return completion status. */
return(status);
}
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