/*++
THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF
ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO
THE IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A
PARTICULAR PURPOSE.
Copyright (c) 1995-2000 Microsoft Corporation.  All rights reserved.

Module Name:  

Abstract:  

Notes: 
--*/

#define EXAMINE_BOOTARGS
#define DEBUGMODE 0

#include <windows.h>
#include <types.h>
#include <ceddk.h>
#include <memory.h>
#include <serhw.h>
#include <ser16550.h>
#include <hw16550.h>
#include <nkintr.h>
#include <devload.h>
#include <windev.h>
#include <notify.h>

#include "S2410.h"

#define USERDBG        1

#ifdef EXAMINE_BOOTARGS
#include <bootarg.h>
#include <oalintr.h>
#include <pc.h>
#endif

#include <ser2410.h>

#undef ZONE_INIT
#include <serdbg.h>

#define BAUD_TABLE_SIZE 23
static const
PAIRS   BaudPairs[BAUD_TABLE_SIZE] =    {
	{50,        2307},
	{75,        1538},
	{110,       1049},
	{135,       858},
	{150,       769},
	{300,       384},
	{600,       192},
	{1200,      96},
	{1800,      64},
	{2000,      58},
	{2400,      48},
	{3600,      32},
	{4800,      24},
	{7200,      16},
	{9600,      12},
	{12800,     9},
	{14400,     8},
	{19200,     6},
	{23040,     5},
	{28800,     4},
	{38400,     3},
	{57600,     2},
	{115200,    1}
};

static const LOOKUP_TBL  BaudTable = {BAUD_TABLE_SIZE, (PAIRS *) BaudPairs};

// Miscellaneous internal routines.
PUCHAR
static
Ser_InternalMapRegisterAddresses(
                                ULONG   HWAddress,
                                ULONG   Size
                                )
{
	PUCHAR              ioPortBase; 
	ULONG               inIoSpace = 1;
	PHYSICAL_ADDRESS    ioPhysicalBase = { HWAddress, 0};

	RETAILMSG(DEBUGMODE, (TEXT("+ Ser_InternalMapRegisterAddresses : HalTranslateBusAddress\r\n")));
	if ( HalTranslateBusAddress(Isa, 0, ioPhysicalBase, &inIoSpace, &ioPhysicalBase) ) {
		DEBUGMSG(1, (TEXT("Ser_InternalMapRegisterAddresses : HalTranslateBusAddress - OK\r\n")));
	        if ( !inIoSpace ) {
			DEBUGMSG(1, (TEXT("Ser_InternalMapRegisterAddresses : ! IO Space\r\n")));
			if ( (ioPortBase = (PUCHAR)MmMapIoSpace(ioPhysicalBase, Size, FALSE)) == NULL ) {
				// We may as well not continue
				DEBUGMSG(ZONE_INIT | ZONE_ERROR, (TEXT("Error mapping I/O Ports\r\n")));
				return (NULL);
			}
		} else {
			DEBUGMSG(1, (TEXT("Ser_InternalMapRegisterAddresses : IO Space\r\n")));
			ioPortBase = (PUCHAR)ioPhysicalBase.LowPart;
		}
	} else {
		DEBUGMSG(ZONE_INIT | ZONE_ERROR, (TEXT("Error translating I/O Ports.\r\n")));
		return (NULL);
	}

	RETAILMSG(DEBUGMODE, (TEXT("- Ser_InternalMapRegisterAddresses : %d\r\n"),ioPortBase ));
	return (ioPortBase);
}

/*
 *  NOTE : The caller should have set pHWHead->fIRMode.  It is not
 * set here, since power on/off may need to temporarily disable
 * the intefaces without actually overwriting the current recorded
 * mode.
 */
static
void
SerSetOutputMode(
                PSER_INFO   pHWHead,
                BOOL UseIR,     // @parm     BOOL Should we use IR interface
                BOOL Use9Pin    // @parm     BOOL Should we use Wire interface
                )
{
	// If you support IR, here you need to set the interface to either IR mode
	// or normal serial. Note that it is possible for both BOOls to
	// be false (i.e. power down), but never for both to be TRUE.

	PS2410_UART_INFO   pHWHead2   = (PS2410_UART_INFO)pHWHead;
	RETAILMSG (DEBUGMODE, (TEXT("SerSetOutputMode : ")));
	if(UseIR)  
	{
		RETAILMSG (DEBUGMODE, (TEXT("IRDA \r\n")));
		SETREG(pHWHead2,rULCON,SER2410_IRMODE_MASK);   // Infra-red mode enable.
	}
	else
	{
		RETAILMSG (DEBUGMODE, (TEXT("SERIAL \r\n")));
		CLEARREG(pHWHead2,rULCON,SER2410_IRMODE_MASK);   // Infra-red mode enable.
	}
}



/*++
*******************************************************************************
Routine:

    Ser_GetRegistryData

Description:

    Take the registry path provided to COM_Init and use it to find this 
    requested comm port's DeviceArrayIndex, teh IOPort Base Address, and the
   Interrupt number.
   
Arguments:

    LPCTSTR regKeyPath	the registry path passed in to COM_Init.

Return Value:

    -1 if there is an error.

*******************************************************************************
--*/
BOOL
Ser_GetRegistryData(PSER_INFO pHWHead, LPCTSTR regKeyPath)
{
#define GCI_BUFFER_SIZE 256   

	LONG    regError;
	HKEY    hKey;
	DWORD   dwDataSize = GCI_BUFFER_SIZE;

	RETAILMSG(DEBUGMODE, (TEXT("Try to open %s\r\n"), regKeyPath));

	// We've been handed the name of a key in the registry that was generated
	// on the fly by device.exe.  We're going to open that key and pull from it
	// a value that is the name of this serial port's real key.  That key
	// will have the DeviceArrayIndex that we're trying to find.  
	hKey = OpenDeviceKey(regKeyPath);
	if ( hKey == NULL ) {
		DEBUGMSG(ZONE_INIT | ZONE_ERROR,(TEXT("Failed to open device key\r\n")));
		return ( FALSE );        
	}

	// Okay, we're finally ready to try and load our registry data.
	dwDataSize = PC_REG_DEVINDEX_VAL_LEN;
	regError = RegQueryValueEx(
					hKey, 
					PC_REG_DEVINDEX_VAL_NAME, 
					NULL, 
					NULL,
					(LPBYTE)(&pHWHead->dwDevIndex), 
					&dwDataSize);

	if ( regError == ERROR_SUCCESS ) {
		dwDataSize = PC_REG_IRQ_VAL_LEN;
		regError = RegQueryValueEx(
					hKey, 
					PC_REG_IRQ_VAL_NAME, 
					NULL, 
					NULL,
					(LPBYTE)(&pHWHead->dwIRQ), 
					&dwDataSize);
	}

	if ( regError == ERROR_SUCCESS ) {
		dwDataSize = PC_REG_IOBASE_VAL_LEN;
		regError = RegQueryValueEx(
					hKey, 
					PC_REG_IOBASE_VAL_NAME, 
					NULL, 
					NULL,
					(LPBYTE)(&pHWHead->dwIOBase), 
					&dwDataSize);
	}

	if ( regError == ERROR_SUCCESS ) {
		dwDataSize = PC_REG_IOLEN_VAL_LEN;
		regError = RegQueryValueEx(
					hKey, 
					PC_REG_IOLEN_VAL_NAME, 
					NULL, 
					NULL,
					(LPBYTE)(&pHWHead->dwIOLen), 
					&dwDataSize);
	}

	RegCloseKey (hKey);

	if ( regError != ERROR_SUCCESS ) {
		RETAILMSG(DEBUGMODE, (TEXT("Failed to get serial registry values, Error 0x%X\r\n"),regError));
		return ( FALSE );
	}

	RETAILMSG (DEBUGMODE,(TEXT("SerInit - Devindex %d, IRQ %d, IOB %X, IOLen %X \r\n"),
		pHWHead->dwDevIndex, pHWHead->dwIRQ, pHWHead->dwIOBase, pHWHead->dwIOLen));
	return ( TRUE ); 
}



/*
 @doc OEM 
 @func PVOID | SerInit | Initializes device identified by argument.
 *  This routine sets information controlled by the user
 *  such as Line control and baud rate. It can also initialize events and
 *  interrupts, thereby indirectly managing initializing hardware buffers.
 *  Exported only to driver, called only once per process.
 *
 @rdesc The return value is a PVOID to be passed back into the HW
 dependent layer when HW functions are called.
 */
static
PVOID
SerInit(
		BOOL bIR,
		ULONG   Identifier, // @parm Device identifier.
		PVOID   pMddHead,   // @parm First argument to mdd callbacks.
		PHWOBJ  pHWObj      // @parm Pointer to our own HW OBJ for this device
       )
{
	PSER_INFO   pHWHead;

#ifdef EXAMINE_BOOTARGS    
	PVOID       *ppBootArgs = NULL;  // Pointer to pointer to bootargs.
	PHYSICAL_ADDRESS PhysicalAddress = {0,0};
#endif    

	// Note on defaults.  While the PC typcially considers COM1 to be at 
	// 3F8, irq4 and COM2 to be 2F8, irq3, NKPC uses COM1 internally for the
	// debugger.  So, when NK tells me to start "COM1" it really means the
	// first one that's available, which is what the PC calls COM2.  Confused?
	// The end result is that COM1 on NK is what the PC considers to be COM2.
	// But wait, there's more.  On a Puzzle, the debugger is on COM2 and the
	// COM1 for NK is ACTUALLY COM1.  So PCs need 2F8 for their port base
	// and Puzzles need 3F8.

	RETAILMSG(DEBUGMODE, (TEXT("SerInit - !!! \r\n")));

	// Allocate for our main data structure and one of it's fields.
	pHWHead = (PSER_INFO)LocalAlloc( LMEM_ZEROINIT|LMEM_FIXED,	sizeof(SER_INFO) );
	if ( !pHWHead )
		return( NULL );

	if ( ! Ser_GetRegistryData(pHWHead, (LPCTSTR)Identifier) ) {
		DEBUGMSG (ZONE_INIT|ZONE_ERROR,
			(TEXT("SerInit - Unable to read registry data.  Failing Init !!! \r\n")));
		goto ALLOCFAILED;
	}

	pHWHead->pBaseAddress = Ser_InternalMapRegisterAddresses(pHWHead->dwIOBase, pHWHead->dwIOLen);

#ifdef EXAMINE_BOOTARGS        
	// Allocate a pointer to our bootargs since they may indicate that we don't have
	// access to the hardware resource.

	// First, map the bootargs pointer itself.  Note that I'm reading/writing
	// directly on the physical address.  I can do this since I know this is CEPC and 
	// know the adress is not in IO space.  For OEM platforms you would want to do
	// HalTranslateBusAddress first.
	PhysicalAddress.LowPart = BOOT_ARG_PTR_LOCATION & ~0x80000000;

	if ( ppBootArgs = MmMapIoSpace(PhysicalAddress, sizeof( PVOID ), TRUE ) ) {
		DEBUGMSG (ZONE_INIT,
			(TEXT("SerInit - ppBootArgs (%X) at %X\r\n"), 
			PhysicalAddress.LowPart, ppBootArgs ));
	} else {
		DEBUGMSG (ZONE_INIT | ZONE_ERROR,
			(TEXT("SerInit - ppBootArgs failure at %X\r\n"), PhysicalAddress.LowPart ));
		goto ALLOCFAILED;
	}

	// Now map the bootargs structure itself
	PhysicalAddress.LowPart = (DWORD) *ppBootArgs;
	if ( pHWHead->pBootArgs = MmMapIoSpace(PhysicalAddress, sizeof(BOOT_ARGS), TRUE ) ) {
		DEBUGMSG (ZONE_INIT,
			(TEXT("SerInit - pBootArgs (%X) at %X\r\n"), 
			PhysicalAddress.LowPart, pHWHead->pBootArgs ));
	} else {
		DEBUGMSG (ZONE_INIT | ZONE_ERROR,
			(TEXT("SerInit - pBootArgs failure at %X\r\n"), 
			(DWORD)PhysicalAddress.LowPart));
		goto ALLOCFAILED;
	}

	// We no longer need ppBootArgs
	MmUnmapIoSpace( ppBootArgs, sizeof(PVOID) );
#endif // EXAMINE_BOOTARGS

	pHWHead->pMddHead     = pMddHead;
	pHWHead->pHWObj = pHWObj;
	pHWHead->cOpenCount   = 0;

	RETAILMSG(DEBUGMODE,(TEXT("SerInit - IRQ %d = SYSINTR %d\r\n"),
					pHWHead->dwIRQ, pHWHead->pHWObj->dwIntID));

	// Set up our Comm Properties data    
	pHWHead->CommProp.wPacketLength       = 0xffff;
	pHWHead->CommProp.wPacketVersion     = 0xffff;
	pHWHead->CommProp.dwServiceMask      = SP_SERIALCOMM;
	pHWHead->CommProp.dwReserved1         = 0;
	pHWHead->CommProp.dwMaxTxQueue        = 16;
	pHWHead->CommProp.dwMaxRxQueue        = 16;
	pHWHead->CommProp.dwMaxBaud       = BAUD_115200;
	pHWHead->CommProp.dwProvSubType      = PST_RS232;
	pHWHead->CommProp.dwProvCapabilities =
		PCF_DTRDSR | PCF_RLSD | PCF_RTSCTS |
		PCF_SETXCHAR |
		PCF_INTTIMEOUTS |
		PCF_PARITY_CHECK |
		PCF_SPECIALCHARS |
		PCF_TOTALTIMEOUTS |
		PCF_XONXOFF;
	pHWHead->CommProp.dwSettableBaud      =
		BAUD_075 | BAUD_110 | BAUD_150 | BAUD_300 | BAUD_600 |
		BAUD_1200 | BAUD_1800 | BAUD_2400 | BAUD_4800 |
		BAUD_7200 | BAUD_9600 | BAUD_14400 |
		BAUD_19200 | BAUD_38400 | BAUD_56K | BAUD_128K |
		BAUD_115200 | BAUD_57600 | BAUD_USER;
	pHWHead->CommProp.dwSettableParams    =
		SP_BAUD | SP_DATABITS | SP_HANDSHAKING | SP_PARITY |
		SP_PARITY_CHECK | SP_RLSD | SP_STOPBITS;
	pHWHead->CommProp.wSettableData       =
		DATABITS_5 | DATABITS_6 | DATABITS_7 | DATABITS_8;
	pHWHead->CommProp.wSettableStopParity =
		STOPBITS_10 | STOPBITS_20 |
		PARITY_NONE | PARITY_ODD | PARITY_EVEN | PARITY_SPACE |
		PARITY_MARK;

	pHWHead->fIRMode = bIR;
	pHWHead->s2410COM.UseIrDA = bIR;

#ifdef EXAMINE_BOOTARGS
	// Don't actually init the hardware if it is being used for debugging
	if ( ((pHWHead->pBootArgs->ucComPort == 1) && (pHWHead->dwIOBase == COM1_BASE)) ||
		((pHWHead->pBootArgs->ucComPort == 2) && (pHWHead->dwIOBase == COM2_BASE)) || 
		((pHWHead->pBootArgs->ucComPort == 3) && (pHWHead->dwIOBase == COM3_BASE)) ||
		((pHWHead->pBootArgs->ucComPort == 4) && (pHWHead->dwIOBase == COM4_BASE)) ) {
		DEBUGMSG (ZONE_INIT|ZONE_ERROR, (TEXT("\r\nSerInit - Skipping hardware init of debug port\r\n\r\n")));        
	} else
#endif
	{
		DEBUGMSG (ZONE_INIT|USERDBG, (TEXT("SerInit - Init 16550 data\r\n")));
		SL_Init( pHWHead, pHWHead->pBaseAddress, 1,
				EvaluateEventFlag, pMddHead, (PLOOKUP_TBL)&BaudTable);
		DEBUGMSG (ZONE_INIT,
			(TEXT("SerInit - Disabling UART Power\r\n")));
		SerSetOutputMode(pHWHead, FALSE, FALSE );    
//		SerSetOutputMode(pHWHead, bIR, ~bIR);    
	}

	return (pHWHead);

	ALLOCFAILED:
	if ( pHWHead->pBaseAddress )
		VirtualFree(pHWHead->pBaseAddress, 0, MEM_RELEASE);
	if ( ppBootArgs )
		MmUnmapIoSpace( ppBootArgs, sizeof( PVOID ) );
	if ( pHWHead->pBootArgs )
		MmUnmapIoSpace( pHWHead->pBootArgs, sizeof(BOOT_ARGS) );

	LocalFree(pHWHead);
	return (NULL);
}


PVOID
SerInitSerial(
       ULONG   Identifier, // @parm Device identifier.
       PVOID   pMddHead,   // @parm First argument to mdd callbacks.
       PHWOBJ  pHWObj      // @parm Pointer to our own HW OBJ for this device
)
{
	RETAILMSG(DEBUGMODE, (TEXT("SerInitSerial\r\n")));
	return (SerInit(FALSE, Identifier, pMddHead, pHWObj));
}

PVOID
SerInitSerial2(
       ULONG   Identifier, // @parm Device identifier.
       PVOID   pMddHead,   // @parm First argument to mdd callbacks.
       PHWOBJ  pHWObj      // @parm Pointer to our own HW OBJ for this device
)
{
	RETAILMSG(DEBUGMODE, (TEXT("SerInitSerial\r\n")));
	return (SerInit(FALSE, Identifier, pMddHead, pHWObj));
}

PVOID
SerInitSerial3(
       ULONG   Identifier, // @parm Device identifier.
       PVOID   pMddHead,   // @parm First argument to mdd callbacks.
       PHWOBJ  pHWObj      // @parm Pointer to our own HW OBJ for this device
)
{
	RETAILMSG(DEBUGMODE, (TEXT("SerInitSerial\r\n")));
	return (SerInit(FALSE, Identifier, pMddHead, pHWObj));
}

PVOID
SerInitIR(
       ULONG   Identifier, // @parm Device identifier.
       PVOID   pMddHead,   // @parm First argument to mdd callbacks.
       PHWOBJ  pHWObj      // @parm Pointer to our own HW OBJ for this device
)
{
	RETAILMSG(DEBUGMODE, (TEXT("SerInitIR\r\n")));
	return (SerInit(TRUE, Identifier, pMddHead, pHWObj));
}



/*
 @doc OEM
 @func ULONG | SerClose | This routine closes the device identified by the PVOID returned by SerInit.
 *  Not exported to users, only to driver.
 *
 @rdesc The return value is 0.
 */
static
ULONG
SerClose(
        PVOID   pHead   // @parm PVOID returned by SerInit.
        )
{
	PSER_INFO   pHWHead = (PSER_INFO)pHead;
	ULONG  uTries;

	RETAILMSG (DEBUGMODE,(TEXT("+SerClose\r\n")));
	if ( pHWHead->cOpenCount ) {
		DEBUGMSG (ZONE_CLOSE, (TEXT("SerClose, closing device\r\n")));
		pHWHead->cOpenCount--;

	// while we are still transmitting, sleep.
		uTries = 0;
		while((pHWHead->s2410COM.s2410SerReg->rUFSTAT & SER2410_FIFOSTAT_MASK) & (uTries++ < 100))  {    // TxFifo not empty..
			DEBUGMSG (ZONE_CLOSE, (TEXT("SerClose, TX in progress.\r\n")));            
			Sleep(10);
		}