mirror of https://github.com/acidanthera/audk.git
451 lines
12 KiB
C
451 lines
12 KiB
C
/**@file
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ISA Floppy Driver
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1. Support two types diskette drive
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1.44M drive and 2.88M drive (and now only support 1.44M)
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2. Support two diskette drives
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3. Use DMA channel 2 to transfer data
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4. Do not use interrupt
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5. Support diskette change line signal and write protect
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Implement the Block IO interface
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Copyright (c) 2006 - 2007, Intel Corporation.<BR>
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All rights reserved. This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#include "IsaFloppy.h"
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EFI_STATUS
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EFIAPI
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FdcReset (
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IN EFI_BLOCK_IO_PROTOCOL *This,
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IN BOOLEAN ExtendedVerification
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)
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/*++
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Routine Description: Reset the Floppy Logic Drive, call the FddReset function
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Parameters:
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This EFI_BLOCK_IO *: A pointer to the Block I/O protocol interface
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ExtendedVerification BOOLEAN: Indicate that the driver may perform a more
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exhaustive verification operation of the device during
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reset, now this par is ignored in this driver
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Returns:
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EFI_SUCCESS: The Floppy Logic Drive is reset
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EFI_DEVICE_ERROR: The Floppy Logic Drive is not functioning correctly
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and can not be reset
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--*/
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// GC_TODO: function comment is missing 'Arguments:'
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// GC_TODO: This - add argument and description to function comment
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// GC_TODO: ExtendedVerification - add argument and description to function comment
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{
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FDC_BLK_IO_DEV *FdcDev;
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//
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// Reset the Floppy Disk Controller
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//
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FdcDev = FDD_BLK_IO_FROM_THIS (This);
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REPORT_STATUS_CODE_WITH_DEVICE_PATH (
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EFI_PROGRESS_CODE,
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EFI_P_PC_RESET | EFI_PERIPHERAL_REMOVABLE_MEDIA,
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FdcDev->DevicePath
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);
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return FddReset (FdcDev);
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}
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EFI_STATUS
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EFIAPI
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FddFlushBlocks (
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IN EFI_BLOCK_IO_PROTOCOL *This
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)
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/*++
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Routine Description:
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Parameters:
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This EFI_BLOCK_IO *: A pointer to the Block I/O protocol interface
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Returns:
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EFI_SUCCESS:
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--*/
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// GC_TODO: function comment is missing 'Arguments:'
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// GC_TODO: This - add argument and description to function comment
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{
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//
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// Not supported yet
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//
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return EFI_SUCCESS;
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}
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STATIC
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VOID
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FddReportStatus (
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IN EFI_BLOCK_IO_PROTOCOL *This,
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IN BOOLEAN Read
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)
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/*++
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Routine Description:
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GC_TODO: Add function description
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Arguments:
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This - GC_TODO: add argument description
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Read - GC_TODO: add argument description
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Returns:
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GC_TODO: add return values
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--*/
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{
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FDC_BLK_IO_DEV *FdcDev;
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FdcDev = FDD_BLK_IO_FROM_THIS (This);
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REPORT_STATUS_CODE_WITH_DEVICE_PATH (
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EFI_ERROR_CODE,
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((Read) ? EFI_P_EC_INPUT_ERROR : EFI_P_EC_OUTPUT_ERROR) | EFI_PERIPHERAL_REMOVABLE_MEDIA,
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FdcDev->DevicePath
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);
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}
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EFI_STATUS
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EFIAPI
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FddReadBlocks (
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IN EFI_BLOCK_IO_PROTOCOL *This,
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IN UINT32 MediaId,
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IN EFI_LBA LBA,
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IN UINTN BufferSize,
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OUT VOID *Buffer
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)
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/*++
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Routine Description: Read the requested number of blocks from the device
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Parameters:
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This EFI_BLOCK_IO *: A pointer to the Block I/O protocol interface
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MediaId UINT32: The media id that the read request is for
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LBA EFI_LBA: The starting logic block address to read from on the device
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BufferSize UINTN: The size of the Buffer in bytes
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Buffer VOID *: A pointer to the destination buffer for the data
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Returns:
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EFI_SUCCESS: The data was read correctly from the device
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EFI_DEVICE_ERROR:The device reported an error while attempting to perform
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the read operation
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EFI_NO_MEDIA: There is no media in the device
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EFI_MEDIA_CHANGED: The MediaId is not for the current media
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EFI_BAD_BUFFER_SIZE: The BufferSize parameter is not a multiple of the
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intrinsic block size of the device
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EFI_INVALID_PARAMETER:The read request contains LBAs that are not valid,
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or the buffer is not on proper alignment
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--*/
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// GC_TODO: function comment is missing 'Arguments:'
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// GC_TODO: This - add argument and description to function comment
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// GC_TODO: MediaId - add argument and description to function comment
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// GC_TODO: LBA - add argument and description to function comment
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// GC_TODO: BufferSize - add argument and description to function comment
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// GC_TODO: Buffer - add argument and description to function comment
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{
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EFI_STATUS Status;
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Status = FddReadWriteBlocks (This, MediaId, LBA, BufferSize, READ, Buffer);
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if (EFI_ERROR (Status)) {
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FddReportStatus (This, TRUE);
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}
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return Status;
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}
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EFI_STATUS
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EFIAPI
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FddWriteBlocks (
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IN EFI_BLOCK_IO_PROTOCOL *This,
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IN UINT32 MediaId,
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IN EFI_LBA LBA,
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IN UINTN BufferSize,
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IN VOID *Buffer
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)
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/*++
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Routine Description: Write a specified number of blocks to the device
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Parameters:
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This EFI_BLOCK_IO *: A pointer to the Block I/O protocol interface
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MediaId UINT32: The media id that the write request is for
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LBA EFI_LBA: The starting logic block address to be written
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BufferSize UINTN: The size in bytes in Buffer
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Buffer VOID *: A pointer to the source buffer for the data
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Returns :
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EFI_SUCCESS: The data were written correctly to the device
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EFI_WRITE_PROTECTED: The device can not be written to
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EFI_NO_MEDIA: There is no media in the device
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EFI_MEDIA_CHANGED: The MediaId is not for the current media
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EFI_DEVICE_ERROR: The device reported an error while attempting to perform
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the write operation
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EFI_BAD_BUFFER_SIZE: The BufferSize parameter is not a multiple of the
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intrinsic block size of the device
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EFI_INVALID_PARAMETER:The write request contains LBAs that are not valid,
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or the buffer is not on proper alignment
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--*/
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// GC_TODO: function comment is missing 'Arguments:'
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// GC_TODO: function comment is missing 'Returns:'
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// GC_TODO: This - add argument and description to function comment
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// GC_TODO: MediaId - add argument and description to function comment
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// GC_TODO: LBA - add argument and description to function comment
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// GC_TODO: BufferSize - add argument and description to function comment
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// GC_TODO: Buffer - add argument and description to function comment
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{
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EFI_STATUS Status;
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Status = FddReadWriteBlocks (This, MediaId, LBA, BufferSize, WRITE, Buffer);
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if (EFI_ERROR (Status)) {
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FddReportStatus (This, FALSE);
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}
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return Status;
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}
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EFI_STATUS
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FddReadWriteBlocks (
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IN EFI_BLOCK_IO_PROTOCOL *This,
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IN UINT32 MediaId,
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IN EFI_LBA LBA,
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IN UINTN BufferSize,
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IN BOOLEAN Operation,
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OUT VOID *Buffer
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)
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/*++
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Routine Description:
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GC_TODO: Add function description
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Arguments:
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This - GC_TODO: add argument description
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MediaId - GC_TODO: add argument description
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LBA - GC_TODO: add argument description
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BufferSize - GC_TODO: add argument description
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Operation - GC_TODO: add argument description
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Buffer - GC_TODO: add argument description
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Returns:
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EFI_INVALID_PARAMETER - GC_TODO: Add description for return value
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EFI_SUCCESS - GC_TODO: Add description for return value
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EFI_DEVICE_ERROR - GC_TODO: Add description for return value
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EFI_DEVICE_ERROR - GC_TODO: Add description for return value
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EFI_NO_MEDIA - GC_TODO: Add description for return value
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EFI_MEDIA_CHANGED - GC_TODO: Add description for return value
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EFI_WRITE_PROTECTED - GC_TODO: Add description for return value
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EFI_BAD_BUFFER_SIZE - GC_TODO: Add description for return value
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EFI_INVALID_PARAMETER - GC_TODO: Add description for return value
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EFI_INVALID_PARAMETER - GC_TODO: Add description for return value
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EFI_SUCCESS - GC_TODO: Add description for return value
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EFI_DEVICE_ERROR - GC_TODO: Add description for return value
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EFI_DEVICE_ERROR - GC_TODO: Add description for return value
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EFI_SUCCESS - GC_TODO: Add description for return value
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--*/
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{
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EFI_BLOCK_IO_MEDIA *Media;
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FDC_BLK_IO_DEV *FdcDev;
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UINTN BlockSize;
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UINTN NumberOfBlocks;
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UINTN BlockCount;
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EFI_STATUS Status;
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//
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// EFI_STATUS CacheStatus;
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//
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EFI_LBA LBA0;
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UINT8 *Pointer;
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//
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// Get the intrinsic block size
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//
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Media = This->Media;
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BlockSize = Media->BlockSize;
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FdcDev = FDD_BLK_IO_FROM_THIS (This);
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if (Operation == WRITE) {
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if (LBA == 0) {
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FdcFreeCache (FdcDev);
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}
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}
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//
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// Check the Parameter is valid
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//
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if (Buffer == NULL) {
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return EFI_INVALID_PARAMETER;
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}
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if (BufferSize == 0) {
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return EFI_SUCCESS;
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}
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//
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// Set the drive motor on
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//
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Status = MotorOn (FdcDev);
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if (EFI_ERROR (Status)) {
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return EFI_DEVICE_ERROR;
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}
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//
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// Check to see if media can be detected
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//
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Status = DetectMedia (FdcDev);
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if (EFI_ERROR (Status)) {
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MotorOff (FdcDev);
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FdcFreeCache (FdcDev);
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return EFI_DEVICE_ERROR;
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}
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//
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// Check to see if media is present
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//
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if (!(Media->MediaPresent)) {
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MotorOff (FdcDev);
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FdcFreeCache (FdcDev);
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/*
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if (FdcDev->Cache) {
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gBS->FreePool (FdcDev->Cache);
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FdcDev->Cache = NULL;
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}
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*/
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return EFI_NO_MEDIA;
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}
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//
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// Check to see if media has been changed
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//
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if (MediaId != Media->MediaId) {
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MotorOff (FdcDev);
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FdcFreeCache (FdcDev);
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return EFI_MEDIA_CHANGED;
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}
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if (Operation == WRITE) {
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if (Media->ReadOnly) {
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MotorOff (FdcDev);
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return EFI_WRITE_PROTECTED;
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}
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}
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//
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// Check the parameters for this read/write operation
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//
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if (BufferSize % BlockSize != 0) {
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MotorOff (FdcDev);
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return EFI_BAD_BUFFER_SIZE;
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}
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if (LBA > Media->LastBlock) {
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MotorOff (FdcDev);
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return EFI_INVALID_PARAMETER;
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}
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if (((BufferSize / BlockSize) + LBA - 1) > Media->LastBlock) {
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MotorOff (FdcDev);
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return EFI_INVALID_PARAMETER;
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}
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if (Operation == READ) {
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//
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// See if the data that is being read is already in the cache
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//
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if (FdcDev->Cache) {
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if (LBA == 0 && BufferSize == BlockSize) {
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MotorOff (FdcDev);
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CopyMem ((UINT8 *) Buffer, (UINT8 *) FdcDev->Cache, BlockSize);
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return EFI_SUCCESS;
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}
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}
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}
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//
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// Set up Floppy Disk Controller
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//
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Status = Setup (FdcDev);
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if (EFI_ERROR (Status)) {
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MotorOff (FdcDev);
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return EFI_DEVICE_ERROR;
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}
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NumberOfBlocks = BufferSize / BlockSize;
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LBA0 = LBA;
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Pointer = Buffer;
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//
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// read blocks in the same cylinder.
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// in a cylinder , there are 18 * 2 = 36 blocks
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//
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BlockCount = GetTransferBlockCount (FdcDev, LBA, NumberOfBlocks);
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while ((BlockCount != 0) && !EFI_ERROR (Status)) {
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Status = ReadWriteDataSector (FdcDev, Buffer, LBA, BlockCount, Operation);
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if (EFI_ERROR (Status)) {
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MotorOff (FdcDev);
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FddReset (FdcDev);
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return EFI_DEVICE_ERROR;
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}
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LBA += BlockCount;
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NumberOfBlocks -= BlockCount;
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Buffer = (VOID *) ((UINTN) Buffer + BlockCount * BlockSize);
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BlockCount = GetTransferBlockCount (FdcDev, LBA, NumberOfBlocks);
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}
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Buffer = Pointer;
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//
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// Turn the motor off
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//
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MotorOff (FdcDev);
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if (Operation == READ) {
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//
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// Cache the data read
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//
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if (LBA0 == 0 && !FdcDev->Cache) {
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FdcDev->Cache = AllocateCopyPool (BlockSize, Buffer);
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}
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}
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return EFI_SUCCESS;
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}
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VOID
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FdcFreeCache (
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IN FDC_BLK_IO_DEV *FdcDev
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)
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/*++
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Routine Description:
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GC_TODO: Add function description
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Arguments:
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FdcDev - GC_TODO: add argument description
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Returns:
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GC_TODO: add return values
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--*/
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{
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if (FdcDev->Cache) {
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gBS->FreePool (FdcDev->Cache);
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FdcDev->Cache = NULL;
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}
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}
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