globals.c

cy68013a USB2.0 highspeed mass storage source code

//-----------------------------------------------------------------------------
//   File:      globals.c
//   Contents:   contains half of the global variables used by the firmware.  This is done
//               to give the linker flexibility.
//
//   indent 3.  NO TABS!
//
//   Copyright (c) 2001-2004 Cypress Semiconductor
//
// $Workfile: globals.c $
// $Date: 6/26/05 1:57p $
// $Revision: 3 $
//-----------------------------------------------------------------------------
#include "fx2.h"
#include "fx2regs.h"
#include "gpif.h"
#include "atapi.h"
#include "globals.h"

volatile BYTE   AlternateSetting;   // Alternate settings
volatile BYTE   Configuration;      // Current configuration
xdata BYTE   eepromAddr;         // EEPROM address -- Could be one of two possibilities 0x52 or 0x54
xdata BYTE   CSMSerial[IDE_ID_SERIAL_LEN];      // CSM serial number

WORD wPacketSize;

// Globals for storing per-LUN information.  Data about each LUN (Logical Unit) is stored
// in two different places:  1) A struct in DATA space for storing drive geometry, capacity,
// etc., 2) a bit field in the BIT DATA area for storing device flags that we need to access
// efficiently.  For each request (CBW), the firmware will swap in the appropriate LUN
// information

// The flags for the LUN that is currently being accessed.
BYTE bdata ActiveLunBits;
// Storage area for LUN0 and LUN1 flags.  DO NOT use MAX_LUN to define this.  The startup code clears 
// exactly two bytes here.  MAX_LUN is 1 in the CF only case.
BYTE bdata LunBits[2];
BYTE sensePtrs[2];
BYTE IOEShadow;

// bit defines for the active LUN
sbit bDevicePresent = ActiveLunBits ^ 0;
sbit bMasterSlave = ActiveLunBits ^ 1;   // 0 == device0 (master), 1 == device1 (slave)

sbit bScsi = ActiveLunBits ^ 3;
sbit bExtAddrSupport = ActiveLunBits ^ 4;
sbit bCompactFlash = ActiveLunBits ^ 5;
sbit bWriteCacheDisabled = ActiveLunBits ^ 6;   // Active low so it starts out active when we set ActiveLunBits to 0

BYTE currentLunNum;

// Device info for the Active LUN
DEVICE_CONFIG_DATA ActiveLunConfigData;
// Sorage area for the LUN0 and LUN1 device info
DEVICE_CONFIG_DATA DeviceConfigData[MAX_LUN];

// this variable is used to store the number of devices attached to the IDE bus.  This is what
// we will use to forumlate our response to the GET MAX LUN Mass Storage Class request.
BYTE deviceCount;

bit  bSkipPinReset;
bit  bFirstTime;
xdata BYTE halfKBuffer[BUFFER_SIZE] _at_ 0xe000;

bit noFlashMedia;
bit ejected;
bit directionIn;
bit phaseErrorState;

// this bit determines if the current transfer is to be carried out using UDMA (1) or
// PIO (0)
bit bUseUdma;
bit bShortPacketSent;
BYTE udmaErrorCount;

bit Sleep;
bit driveIsInStandby;

idata BYTE prevCmd[12];  
bit attemptFastRead;
bit attemptFastWrite;
bit attemptFastScsi;
bit bScsiRegsPreloaded;
WORD gSectorcount; 
idata DWORD prevDataTransferLen;
 
bit mfgMode;

BYTE report[2];
bit receivedReport_Flag;

BYTE oldButtons;

BYTE bdata miscConfig;
BYTE bdata miscConfig2;
sbit bATA_UDMA_ENABLE             = miscConfig^7;
sbit bATAPI_UDMA_ENABLE           = miscConfig^6;
sbit bENABLE_WRITE_CACHE_MODE_PAGE= miscConfig^5;
sbit bCOMPLIANCE_MODE             = miscConfig^4;                // Compliance mode uses the INTRQ pin less, but it will pass the BOT tests.
sbit bWAIT_FOR_BUSY_BIT           = miscConfig^3;
sbit bSHORT_PACKET_BEFORE_STALL   = miscConfig^2;
sbit bSRST_ENABLE                 = miscConfig^1;
sbit bSKIP_PIN_RESET              = miscConfig^0;
BYTE bdata pinConfig;
sbit bBUTTON_PINOUT               = pinConfig ^ 7;
sbit bATA_ENABLED                 = pinConfig ^ 6;
sbit bBIG_PACKAGE                 = pinConfig ^ 5;
sbit bATA_EN                      = pinConfig ^ 4;
sbit bNewAt2pinout                = pinConfig ^ 3;
sbit bHS_INDICATOR                = pinConfig ^ 2;
sbit bDRVPWRVLD_POLARITY          = pinConfig ^ 1;
sbit bDRVPWRVLD_ENABLE            = pinConfig ^ 0;
sbit bCF_USES_UDMA                = miscConfig2 ^ 3;
sbit b2LUN_SET_BY_EEPROM          = miscConfig2 ^ 2;
sbit b1LUN_SET_BY_EEPROM          = miscConfig2 ^ 1;
sbit bSEARCH_ATA_ON_WAKEUP        = miscConfig2 ^ 0;

xdata BYTE HIDIntrfcDscrOffset;
xdata BYTE CSMIntrfcDscrOffset;