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/*
* Copyright (c) 2006 Advanced Micro Devices,Inc. ("AMD").
*
* This library is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of the
* License, or (at your option) any later version.
*
* This code is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
* You should have received a copy of the GNU Lesser General
* Public License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, MA 02111-1307 USA
*/
//* Function: *
//* This file handles the Legacy VSM's event messages.
#include "vsa2.h"
#include "chipset.h"
#include "vr.h"
#include "legacy.h"
#include "protos.h"
#include "pci.h"
#include "isa.h"
// Function prototypes
extern void Handle_BLOCKIO(USHORT, ULONG, UCHAR);
extern void Handle_VirtualRegs(UCHAR, UCHAR, UCHAR, USHORT);
extern void Do_OHCI_SWAPSiF(void);
// External variables:
extern ULONG ChipsetBase;
extern USHORT DiskTimeout, SerialTimeout, ParallelTimeout, FloppyTimeout;
// Local variables:
USHORT IDE_Interface = MASTER_IDE; // Default to "bus master capable"
typedef void (* PCI_HANDLER)(USHORT, USHORT, ULONG);
PCI_HANDLER Handle_PCI_Traps;
//***********************************************************************
// Register I/O trap to fix 118.409 - Block/Demand mode fails
//***********************************************************************
void Register_DMA_Fix(void)
{
#define DMA_FLAGS (WRITES_ONLY | ONE_SHOT)
SYS_REGISTER_EVENT(EVENT_IO_TRAP, DMA1_MODE, DMA_FLAGS | 1, 0);
}
//***********************************************************************
// Handler for MSG_EVENT
//***********************************************************************
void Handle_Events(ULONG * Param)
{ USHORT Event, IO_Address;
ULONG Data;
UCHAR WrFlag, DataSize, Class, Index;
Event = (USHORT)Param[0];
IO_Address = (USHORT)Param[2];
DataSize = (UCHAR)(Param[2] >> 16);
Data = Param[3];
switch (Event) {
case EVENT_IO_TRAP:
// If it is an I/O to the 8237 DMA controller...
if (IO_Address == DMA1_MODE) {
static UCHAR Mode = 0x00;
UCHAR ByteData;
// and it is a I/O write...
if (Param[1] & 2) {
ByteData = (UCHAR)Data;
// and the Mode is either Block or Demand...
Mode = ByteData & MODE_MASK;
if (Mode == MODE_DEMAND || Mode == MODE_BLOCK) {
// then change the mode to Single
ByteData &= ~MODE_MASK;
ByteData |= MODE_SINGLE;
}
// Re-issue the I/O (trapping is disabled since it was a ONE_SHOT)
out_8(DMA1_MODE, ByteData);
}
// Re-register for the I/O trap
Register_DMA_Fix();
break;
}
// Handle PM traps here...
break;
case EVENT_IO_TIMEOUT:
// Handle PM timeout here...
break;
case EVENT_SOFTWARE_SMI:
if (Param[1] == SYS_DMA_DRIVER) {
// Allow the UDMA driver to see that IDE is bus master capable.
IDE_Interface = MASTER_IDE;
} else if (Param[1] == SYS_DMA_DRIVER+1) {
// Prevent the UDMA driver from seeing that IDE is bus master capable.
IDE_Interface = 0;
}
break;
case EVENT_PCI_TRAP:
Handle_PCI_Traps((USHORT)Param[1], (USHORT)Param[2], Data);
break;
case EVENT_VIRTUAL_REGISTER:
// Extract virtual register parameters from message
Class = (UCHAR)(Param[1] >> 8);
Index = (UCHAR)Param[1];
WrFlag = (UCHAR)Param[2];
Handle_VirtualRegs(Class, Index, WrFlag, (USHORT)Data);
break;
case EVENT_BLOCKIO:
Handle_BLOCKIO(IO_Address, Data, DataSize);
break;
case EVENT_TIMER:
// Fix for attach/detach hardware bug
if (Param[2] == USBF_HANDLE) {
Do_OHCI_SWAPSiF();
break;
}
/*MEJ // Broadcast to all VSM's
Param[0] = S5_STATE;
Param[1] = CLASS_ALL;
SYS_BROADCAST_MSG(MSG_SET_POWER_STATE, &Param[0], VSM_ANY);
*/
break;
}
}
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