IsaFloppyBlock.c revision 4fd606d1f5abe38e1f42c38de1d2e895166bd0f4
/** @file
Implementation of the EFI Block IO Protocol for ISA Floppy driver
Copyright (c) 2006 - 2009, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#include "IsaFloppy.h"
/**
Reset the Block Device.
@param This Indicates a pointer to the calling context.
@param ExtendedVerification Driver may perform diagnostics on reset.
@retval EFI_SUCCESS The device was reset.
@retval EFI_DEVICE_ERROR The device is not functioning properly and could
not be reset.
**/
FdcReset (
)
{
//
// Reset the Floppy Disk Controller
//
);
}
/**
Flush the Block Device.
@param This Indicates a pointer to the calling context.
@retval EFI_SUCCESS All outstanding data was written to the device
@retval EFI_DEVICE_ERROR The device reported an error while writting back the data
@retval EFI_NO_MEDIA There is no media in the device.
**/
)
{
//
// Not supported yet
//
return EFI_SUCCESS;
}
/**
Common report status code interface.
@param This Pointer of FDC_BLK_IO_DEV instance
@param Read Read or write operation when error occurrs
**/
)
{
);
}
/**
Read BufferSize bytes from Lba into Buffer.
@param This Indicates a pointer to the calling context.
@param MediaId Id of the media, changes every time the media is replaced.
@param Lba The starting Logical Block Address to read from
@param BufferSize Size of Buffer, must be a multiple of device block size.
@param Buffer A pointer to the destination buffer for the data. The caller is
responsible for either having implicit or explicit ownership of the buffer.
@retval EFI_SUCCESS The data was read correctly from the device.
@retval EFI_DEVICE_ERROR The device reported an error while performing the read.
@retval EFI_NO_MEDIA There is no media in the device.
@retval EFI_MEDIA_CHANGED The MediaId does not matched the current device.
@retval EFI_BAD_BUFFER_SIZE The Buffer was not a multiple of the block size of the device.
@retval EFI_INVALID_PARAMETER The read request contains LBAs that are not valid,
or the buffer is not on proper alignment.
**/
)
{
}
return Status;
}
/**
Write BufferSize bytes from Lba into Buffer.
@param This Indicates a pointer to the calling context.
@param MediaId The media ID that the write request is for.
@param Lba The starting logical block address to be written. The caller is
responsible for writing to only legitimate locations.
@param BufferSize Size of Buffer, must be a multiple of device block size.
@param Buffer A pointer to the source buffer for the data.
@retval EFI_SUCCESS The data was written correctly to the device.
@retval EFI_WRITE_PROTECTED The device can not be written to.
@retval EFI_DEVICE_ERROR The device reported an error while performing the write.
@retval EFI_NO_MEDIA There is no media in the device.
@retval EFI_MEDIA_CHNAGED The MediaId does not matched the current device.
@retval EFI_BAD_BUFFER_SIZE The Buffer was not a multiple of the block size of the device.
@retval EFI_INVALID_PARAMETER The write request contains LBAs that are not valid,
or the buffer is not on proper alignment.
**/
)
{
}
return Status;
}
/**
Read or Write a number of blocks to floppy disk
@param This Indicates a pointer to the calling context.
@param MediaId Id of the media, changes every time the media is replaced.
@param Lba The starting Logical Block Address to read from
@param BufferSize Size of Buffer, must be a multiple of device block size.
@param Operation Specifies the read or write operation.
@param Buffer A pointer to the destination buffer for the data. The caller is
responsible for either having implicit or explicit ownership of the buffer.
@retval EFI_SUCCESS The data was read correctly from the device.
@retval EFI_DEVICE_ERROR The device reported an error while performing the read.
@retval EFI_NO_MEDIA There is no media in the device.
@retval EFI_MEDIA_CHANGED The MediaId does not matched the current device.
@retval EFI_BAD_BUFFER_SIZE The Buffer was not a multiple of the block size of the device.
@retval EFI_INVALID_PARAMETER The read request contains LBAs that are not valid,
or the buffer is not on proper alignment.
@retval EFI_WRITE_PROTECTED The device can not be written to.
**/
)
{
//
// Get the intrinsic block size
//
if (Lba == 0) {
}
}
//
// Set the drive motor on
//
return EFI_DEVICE_ERROR;
}
//
// Check to see if media can be detected
//
return EFI_DEVICE_ERROR;
}
//
// Check to see if media is present
//
if (!(Media->MediaPresent)) {
return EFI_NO_MEDIA;
}
//
// Check to see if media has been changed
//
return EFI_MEDIA_CHANGED;
}
if (BufferSize == 0) {
return EFI_SUCCESS;
}
return EFI_WRITE_PROTECTED;
}
}
//
//
return EFI_INVALID_PARAMETER;
}
if (BufferSize % BlockSize != 0) {
return EFI_BAD_BUFFER_SIZE;
}
return EFI_INVALID_PARAMETER;
}
return EFI_INVALID_PARAMETER;
}
//
// See if the data that is being read is already in the cache
//
return EFI_SUCCESS;
}
}
}
//
// Set up Floppy Disk Controller
//
return EFI_DEVICE_ERROR;
}
//
// read blocks in the same cylinder.
// in a cylinder , there are 18 * 2 = 36 blocks
//
return EFI_DEVICE_ERROR;
}
Lba += BlockCount;
}
//
// Turn the motor off
//
//
// Cache the data read
//
}
}
return EFI_SUCCESS;
}
/**
Free cache for a floppy disk.
@param FdcDev A Pointer to FDC_BLK_IO_DEV instance
**/
)
{
}
}