systffs.c

wind river提供的MPC8260的BSP典型代码

/* sysTffs.c - Wind River SBC8260 system-dependent TrueFFS library */

/* Copyright 1984-2002 Wind River Systems, Inc. */
#include "copyright_wrs.h"

/*
modification history
--------------------
01c,20mar02,kab  T2.2 update
01b,11may01,g_h cleaning
01a,29dec00,jec ported from ADS860 driver.
*/

/*
DESCRIPTION
This library provides board-specific hardware access routines for TrueFFS.
In effect, these routines comprise the socket component driver (or drivers)
for your flash device hardware.  At socket registration time, TrueFFS stores
pointers to the functions of this socket component driver in an 'FLSocket'
structure.  When TrueFFS needs to access the flash device, it uses these
functions.

Because this file is, for the most part, a device driver that exports its
functionality by registering function pointers with TrueFFS, very few of the
functions defined here are externally callable.  For the record, these
external functions are flFitInSocketWindow() and flDelayLoop().  You should
never have any need to call these functions.

However, one of the most import functions defined in this file is neither
referenced in an 'FLSocket' structure, nor is it externally callable.  This
function is sysTffsInit().  TrueFFS calls this function at initialization
time to register socket component drivers for all the flash devices attached
to your target.  It is this call to sysTffs() that results in assigning
drive numbers to the flash devices on your target hardware.  Drive numbers
are assigned by the order in which the socket component drivers are registered.
The first to be registered is drive 0, the second is drive 1, and so on up to
4.  As shipped, TrueFFS supports up to five flash drives.

After registering socket component drivers for a flash device, you may
format the flash medium even though there is not yet a block device driver
associated with the flash (see the reference entry for the tffsDevCreate()
routine).  To format the flash medium for use with TrueFFS,
call tffsDevFormat() or, for some BSPs, sysTffsFormat().

The sysTffsFormat() routine is an optional but BSP-specific externally
callable helper function.  Internally, it calls tffsDevFormat() with a
pointer to a 'FormatParams' structure initialized to values that leave a
space on the flash device for a boot image. This space is outside the
region managed by TrueFFS.  This special region is necessary for boot
images because the normal translation and wear-leveling services of TrueFFS
are incompatible with the needs of the boot program and the boot image it
relies upon.  To write a boot image (or any other data) into this area,
use tffsBootImagePut().

Finally, this file also contains define statements for symbolic constants
that determine which MTDs, translation layer modules, and other utilities
are ultimately included in TrueFFS.  These defines are as follows:

.IP "INCLUDE_TL_NFTL"
To include the NAND-based translation layer module.
.IP "INCLUDE_TL_FTL"
To include the NOR-based translation layer module.
.IP "INCLUDE_TL_SSFDC"
To include the SSFDC-appropriate translation layer module.
.IP "INCLUDE_MTD_I28F016"
For Intel 28f016 flash devices.
.IP "INCLUDE_MTD_I28F008"
For Intel 28f008 flash devices.
.IP "INCLUDE_MTD_I28F008_BAJA"
For Intel 28f008 flash devices on the Heurikon Baja 4700.
.IP "INCLUDE_MTD_AMD"
For AMD, Fujitsu: 29F0{40,80,16} 8-bit flash devices.
.IP "INCLUDE_MTD_CDSN"
For Toshiba, Samsung: NAND CDSN flash devices.
.IP "INCLUDE_MTD_DOC2"
For Toshiba, Samsung: NAND DOC flash devices.
.IP "INCLUDE_MTD_CFISCS"
For CFI/SCS flash devices.
.IP "INCLUDE_MTD_WAMD"
For AMD, Fujitsu 29F0{40,80,16} 16-bit flash devices.
.IP "INCLUDE_TFFS_BOOT_IMAGE"
To include tffsBootImagePut() in TrueFFS for Tornado.
.LP
To exclude any of the modules mentioned above, edit sysTffs.c and undefine
its associated symbolic constant.

The function sysTffsFormat() is provided so one might seasily format the
Flash SIMM to have the TFFS file system in one half of it.

INCLUDE FILES: flsocket.h, tffsDrv.h
*/


/* includes */

#include "vxWorks.h"
#include "taskLib.h"
#include "config.h"
#include "tffs/flsocket.h"
#include "tffs/tffsDrv.h"

/* defines */
#ifndef PRJ_BUILD
#undef	INCLUDE_MTD_I28F016		/* Intel: 28f016 */
#undef	INCLUDE_MTD_I28F008		/* Intel: 28f008 */
#define	INCLUDE_MTD_AMD			/* AMD, Fujitsu: 29f0{40,80,16} 8bit */
#undef	INCLUDE_MTD_CDSN		/* Toshiba, Samsung: NAND, CDSN */
#undef	INCLUDE_MTD_DOC2		/* Toshiba, Samsung: NAND, DOC */
#undef	INCLUDE_MTD_CFISCS		/* CFI/SCS */
#undef	INCLUDE_MTD_WAMD		/* AMD, Fujitsu: 29f0{40,80,16} 16bit */
#undef	INCLUDE_TL_NFTL			/* NFTL translation layer */
#define	INCLUDE_TL_FTL			/* FTL translation layer */
#undef	INCLUDE_TL_SSFDC		/* SSFDC translation layer */
#endif /* PRJ_BUILD */

#define	INCLUDE_SOCKET_SIMM		/* SIMM socket interface */
#undef	INCLUDE_SOCKET_PCMCIA		/* PCMCIA socket interface */

#define INCLUDE_TFFS_BOOT_IMAGE		       /* include tffsBootImagePut() */

#define	FLASH_BASE_ADRS	CS6_FLASH_ADRS         /* Flash memory base address */
#define	FLASH_SIZE		CS6_FLASH_SIZE /* Flash memory size */
#undef	HALF_FORMAT	                       /* lower 0.5MB for bootimage,
						  upper 1.5MB for TFFS */
#define VCC_DELAY_MSEC		100	       /* Millisecs to wait for Vcc 
						  ramp up */
#define VPP_DELAY_MSEC		100	       /* Millisecs to wait for Vpp 
						  ramp up */
#define BCSR1_PCCVPP_12V	0x00200000
#define KILL_TIME_FUNC	 ((iz * iz) / (iz + iz)) / ((iy + iz) / (iy * iz))

/* locals */

LOCAL UINT32 sysTffsMsecLoopCount = 0;


/* forward declarations */

#ifdef	INCLUDE_SOCKET_SIMM
LOCAL FLBoolean		simmCardDetected (FLSocket vol);
LOCAL void		simmVccOn (FLSocket vol);
LOCAL void		simmVccOff (FLSocket vol);
#ifdef	SOCKET_12_VOLTS
LOCAL FLStatus		simmVppOn (FLSocket vol);
LOCAL void		simmVppOff (FLSocket vol);
#endif	/* SOCKET_12_VOLTS */
LOCAL FLStatus		simmInitSocket (FLSocket vol);
LOCAL void		simmSetWindow (FLSocket vol);
LOCAL void		simmSetMappingContext (FLSocket vol, unsigned page);
LOCAL FLBoolean		simmGetAndClearCardChangeIndicator (FLSocket vol);
LOCAL FLBoolean		simmWriteProtected (FLSocket vol);
LOCAL void		simmRegister (void);
#endif	/* INCLUDE_SOCKET_SIMM */

#ifdef	INCLUDE_SOCKET_PCMCIA
LOCAL FLBoolean		pcCardDetected (FLSocket vol);
LOCAL void		pcVccOn (FLSocket vol);
LOCAL void		pcVccOff (FLSocket vol);
#ifdef	SOCKET_12_VOLTS
LOCAL FLStatus		pcVppOn (FLSocket vol);
LOCAL void		pcVppOff (FLSocket vol);
#endif	/* SOCKET_12_VOLTS */
LOCAL FLStatus		pcInitSocket (FLSocket vol);
LOCAL void		pcSetWindow (FLSocket vol);
LOCAL void		pcSetMappingContext (FLSocket vol, unsigned page);
LOCAL FLBoolean		pcGetAndClearCardChangeIndicator (FLSocket vol);
LOCAL FLBoolean		pcWriteProtected (FLSocket vol);
LOCAL void		pcRegister (void);
#endif	/* INCLUDE_SOCKET_PCMCIA */


#ifndef DOC
#include "tffs/tffsConfig.c"
#endif /* DOC */

/*******************************************************************************
*
* sysTffsInit - board level initialization for TFFS
*
* This routine calls the socket registration routines for the socket component
* drivers that will be used with this BSP. The order of registration signifies
* the logical drive number given to the drive associated with the socket.
*
* RETURNS: N/A
*/

LOCAL void sysTffsInit 
    (
    void
    )
    {
    UINT32 ix = 0;
    UINT32 iy = 1;
    UINT32 iz = 2;
    int oldTick;

    /* we assume followings:
     *   - no interrupts except timer is happening.
     *   - the loop count that consumes 1 msec is in 32 bit.
     * it is done in the early stage of usrRoot() in tffsDrv().  */

    oldTick = tickGet ();
    while (oldTick == tickGet ())	/* wait for next clock interrupt */
	;

    oldTick = tickGet ();
    while (oldTick == tickGet ())	/* loop one clock tick */
	{
	iy = KILL_TIME_FUNC;		/* consume time */
	ix++;				/* increment the counter */
	}

    sysTffsMsecLoopCount = ix * sysClkRateGet () / 1000;

#ifdef	INCLUDE_SOCKET_SIMM
    simmRegister ();			/* SIMM socket interface register */
#endif	/* INCLUDE_SOCKET_SIMM */

#ifdef	INCLUDE_SOCKET_PCMCIA
    pcRegister ();			/* PCMCIA socket interface register */
#endif	/* INCLUDE_SOCKET_PCMCIA */
    }

#ifdef	INCLUDE_SOCKET_SIMM
/*******************************************************************************
*
* simmRegister - install routines for the Flash SIMM
*
* This routine installs necessary functions for the Flash SIMM.
*
* RETURNS: N/A
*/

LOCAL void simmRegister 
    (
    void
    )
    {
    FLSocket vol = flSocketOf (noOfDrives);

#if (CS6_FLASH_SIZE == FLASH_SIZE_4MB)
    tffsSocket[noOfDrives] =	"SIMM";
#else /* On Board FLASH */
	tffsSocket[noOfDrives] =	"OnBoard";
#endif /* (CS6_FLASH_SIZE == FLASH_SIZE_4MB) */
    vol.window.baseAddress =	(unsigned int)(FLASH_BASE_ADRS >> 12);
    vol.cardDetected =		simmCardDetected;
    vol.VccOn =			simmVccOn;
    vol.VccOff =		simmVccOff;
#ifdef SOCKET_12_VOLTS
    vol.VppOn =			simmVppOn;
    vol.VppOff =		simmVppOff;
#endif
    vol.initSocket =		simmInitSocket;
    vol.setWindow =		simmSetWindow;
    vol.setMappingContext =	simmSetMappingContext;
    vol.getAndClearCardChangeIndicator = simmGetAndClearCardChangeIndicator;
    vol.writeProtected =	simmWriteProtected;
    noOfDrives++;
    }

/*******************************************************************************
*
* simmCardDetected - detect if a card is present (inserted)
*
* This routine detects if a card is present (inserted).
*
* RETURNS: TRUE, or FALSE if the card is not present.
*/

LOCAL FLBoolean simmCardDetected
    (
    FLSocket vol		/* pointer identifying drive */
    )
    {
    return (TRUE);
    }

/*******************************************************************************
*
* simmVccOn - turn on Vcc (3.3/5 Volts)
*
* This routine turns on Vcc (3.3/5 Volts).  Vcc must be known to be good
* on exit.
*
* RETURNS: N/A
*/

LOCAL void simmVccOn
    (
    FLSocket vol		/* pointer identifying drive */
    )
    {
    }

/*******************************************************************************
*
* simmVccOff - turn off Vcc (3.3/5 Volts)
*
* This routine turns off Vcc (3.3/5 Volts).
*
* RETURNS: N/A
*/

LOCAL void simmVccOff
    (
    FLSocket vol		/* pointer identifying drive */
    )
    {
    }

#ifdef SOCKET_12_VOLTS

/*******************************************************************************
*
* simmVppOn - turns on Vpp (12 Volts)
*
* This routine turns on Vpp (12 Volts). Vpp must be known to be good on exit.
*
* RETURNS: flOK always.
*/

LOCAL FLStatus simmVppOn
    (
    FLSocket vol		/* pointer identifying drive */
    )
    {
    return (flOK);
    }

/*******************************************************************************
*
* simmVppOff - turns off Vpp (12 Volts)
*
* This routine turns off Vpp (12 Volts).
*
* RETURNS: N/A
*/

LOCAL void simmVppOff
    (
    FLSocket vol		/* pointer identifying drive */
    )
    {
    }

#endif	/* SOCKET_12_VOLTS */

/*******************************************************************************
*
* simmInitSocket - perform all necessary initializations of the socket
*
* This routine performs all necessary initializations of the socket.
*
* RETURNS: flOK always.
*/

LOCAL FLStatus simmInitSocket
    (
    FLSocket vol		/* pointer identifying drive */
    )
    {

    return (flOK);
    }

/*******************************************************************************
*
* simmSetWindow - set current window attributes, Base address, size, etc
*
* This routine sets current window hardware attributes: Base address, size,
* speed and bus width.  The requested settings are given in the 'vol.window'
* structure.  If it is not possible to set the window size requested in
* 'vol.window.size', the window size should be set to a larger value,
* if possible. In any case, 'vol.window.size' should contain the
* actual window size (in 4 KB units) on exit.
*
* RETURNS: N/A
*/

LOCAL void simmSetWindow
    (
    FLSocket vol		/* pointer identifying drive */
    )
    {
    /* Physical base as a 4K page */

    vol.window.baseAddress = (unsigned int)(FLASH_BASE_ADRS >> 12);

    flSetWindowSize (&vol, FLASH_SIZE >> 12);
    }

/*******************************************************************************
*
* simmSetMappingContext - sets the window mapping register to a card address
*
* This routine sets the window mapping register to a card address.
* The window should be set to the value of 'vol.window.currentPage',
* which is the card address divided by 4 KB. An address over 128MB,
* (page over 32K) specifies an attribute-space address.
*
* The page to map is guaranteed to be on a full window-size boundary.
*
* RETURNS: N/A
*/

LOCAL void simmSetMappingContext
    (
    FLSocket vol,		/* pointer identifying drive */
    unsigned page		/* page to be mapped */
    )
    {
    }

/*******************************************************************************
*
* simmGetAndClearCardChangeIndicator - return the hardware card-change indicator
*
* This routine returns the hardware card-change indicator and clears it if set.
*
* RETURNS: FALSE, or TRUE if the card has been changed
*/

LOCAL FLBoolean simmGetAndClearCardChangeIndicator
    (
    FLSocket vol		/* pointer identifying drive */
    )
    {
    return (FALSE);
    }

/*******************************************************************************
*
* simmWriteProtected - return the write-protect state of the media
*
* This routine returns the write-protect state of the media
*
* RETURNS: FALSE, or TRUE if the card is write-protected
*/

LOCAL FLBoolean simmWriteProtected
    (
    FLSocket vol		/* pointer identifying drive */
    )
    {
    return (FALSE);
    }
#endif	/* INCLUDE_SOCKET_SIMM */

#ifdef	INCLUDE_SOCKET_PCMCIA
/*******************************************************************************
*
* pcRegister - install routines for the PCMCIA Flash Card
*
* This routine installs necessary functions for the PCMCIA Flash Card.
*
* RETURNS: N/A
*/

LOCAL void pcRegister 
    (
    void
    )
    {
    FLSocket vol = flSocketOf (noOfDrives);

    tffsSocket[noOfDrives] =	"PCMCIA";
    vol.window.baseAddress =	(PC_BASE_ADRS_0) >> 12;
    vol.cardDetected =		pcCardDetected;
    vol.VccOn =			pcVccOn;
    vol.VccOff =		pcVccOff;
#ifdef SOCKET_12_VOLTS
    vol.VppOn =			pcVppOn;