amd_flash.h

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/*
 * File:        amd_flash.h
 * Purpose:     Flash driver for programming all AMD Flash devices 
 *
 * Notes:       This driver supports a single type (AM29XXXX) and
 *              width of FLASH.  The type and width support is done
 *              at compilation.  It supports multiple banks of same-
 *              width Flash, as well as consecutive/contiguous banks.
 *
 * Modifications:
 *
 */

#ifndef _AMD_FLASH_H
#define _AMD_FLASH_H

/********************************************************************/
#if defined(__GNUC__)

void
amd_flash_init(ADDRESS)
    __attribute__ ((section(".code_relocation")));

int
amd_flash_erase(ADDRESS, int, void(*)(char))
    __attribute__ ((section(".code_relocation")));

int 
amd_flash_program(ADDRESS, ADDRESS, int, int, void(*)(void), void(*)(char))
    __attribute__ ((section(".code_relocation")));

ADDRESS 
amd_flash_sector_start(ADDRESS)
    __attribute__ ((section(".code_relocation")));

ADDRESS 
amd_flash_sector_end(ADDRESS)
    __attribute__ ((section(".code_relocation")));
    
int amd_flash_secsi_read(ADDRESS, ADDRESS, int)
    __attribute__ ((section(".code_relocation")));
    
int amd_flash_secsi_write(ADDRESS, ADDRESS, int)
    __attribute__ ((section(".code_relocation")));
    
int amd_flash_secsi_protect(void)
    __attribute__ ((section(".code_relocation")));
    
int amd_flash_boot_get(void)
   __attribute__ ((section(".code_relocation")));

#else

void
amd_flash_init(ADDRESS);

int
amd_flash_erase(ADDRESS, int, void(*)(char));

int 
amd_flash_program(ADDRESS, ADDRESS, int, int, void(*)(void), void(*)(char));

ADDRESS 
amd_flash_sector_start(ADDRESS);

ADDRESS 
amd_flash_sector_end(ADDRESS);

int amd_flash_secsi_read(ADDRESS, ADDRESS, int);

int amd_flash_secsi_write(ADDRESS, ADDRESS, int);

int amd_flash_secsi_protect(void);

int amd_flash_boot_get(void);

#endif /* defined(__GNUC__) */

/********************************************************************/

typedef struct 
{
    uint32 size;    /* Sector size in bytes */
    uint32 offset;  /* Offset from base of device */
} AMD_FLASH_SECTOR_INFO;

/********************************************************************/

#ifndef AMD_FLASH_DEVICES
#define AMD_FLASH_DEVICES 1
#endif

/********************************************************************/
/* 
 * Am29LV004B (8bit only)
 */
#if (defined(AMD_FLASH_AM29LV004BT) || \
     defined(AMD_FLASH_AM29LV004BB))

#define AMD_FLASH_8BIT
#define AMD_FLASH_SECTORS       11

/* 
 * Am29PL160C - 16-bit Mode 
 */
#elif defined(AMD_FLASH_AM29PL160CB_16BIT)
#define AMD_FLASH_16BIT
#define AMD_FLASH_SECTORS       11
#define AMD_FLASH_UNLOCK_BYPASS

/* 
 * Am29PL160D - 16-bit Mode 
 */
#elif defined(AMD_FLASH_AM29LV160DB_16BIT)

#define AMD_FLASH_16BIT
#define AMD_FLASH_SECTORS       35
#define AMD_FLASH_UNLOCK_BYPASS 

/* 
 * Am29BDD160G - 32-bit Mode 
 */
#elif defined(AMD_FLASH_AM29BDD160GB_32BIT)

#define AMD_FLASH_32BIT
#define AMD_FLASH_SECTORS       46
#define AMD_FLASH_UNLOCK_BYPASS

/* 
 * Am29BDD160G - 16-bit Mode 
 */
#elif defined(AMD_FLASH_AM29BDD160GB_16BIT)

#define AMD_FLASH_16BIT
#define AMD_FLASH_SECTORS       46
#define AMD_FLASH_UNLOCK_BYPASS

/* Constants for autoselect mode */
#define DEVADDR1    0x02            /* Address for byte 1 of device ID */
#define DEVADDR2    0x1c            /* Address for byte 2 of device ID */
#define DEVADDR3    0x1e            /* Address for byte 3 of device ID */

#define ADDR1		0xAAA			/* These two defines are used as the */
#define ADDR2		0x555 			/* addresses for the command algorithms */

#define BOOT_BLOCK_TOP    0
#define BOOT_BLOCK_BOTTOM 1

#define SECSI_PROTECT_ADDR (0x1A<<1) 


/*
 * Am29LV640MH/L - 16-bit Mode
 */
#elif (defined(AMD_FLASH_AM29LV640M_16BIT)  || \
       defined(AMD_FLASH_AM29LV640MH_16BIT) || \
       defined(AMD_FLASH_AM29LV640ML_16BIT))

#define AMD_FLASH_16BIT
#define AMD_FLASH_SECTORS       128
#define AMD_FLASH_UNLOCK_BYPASS

/*
 * Am29LV128MH/L - 16-bit Mode
 */
#elif (defined(AMD_FLASH_AM29LV128M_16BIT)  || \
       defined(AMD_FLASH_AM29LV128MH_16BIT) || \
       defined(AMD_FLASH_AM29LV128ML_16BIT))

#define AMD_FLASH_16BIT
#define AMD_FLASH_SECTORS       256
#define AMD_FLASH_UNLOCK_BYPASS

#else
#error "Unsupported Flash device"
#endif

#ifndef ADDR1
	#define ADDR1		0x555			/* These two defines are used as the */
	#define ADDR2		0x2AA 			/* addresses for the command algorithms */
#endif

/********************************************************************/
/*
 * Defines used to correctly address the Flash device(s)
 *
 * AMD_FLASH_BUS_SHIFT  - Number of bits to right-shift the byte
 *                        offsets of the sectors
 * AMD_FLASH_CELL       - Port size of Flash device(s)
 * AMD_FLASH_CMD_DATA   - Format of data when issuing commands
 *                        
 */
#if defined(AMD_FLASH_8BIT)
    #if (AMD_FLASH_DEVICES == 1)
        #define AMD_FLASH_BUS_SHIFT     0
        #define AMD_FLASH_CELL          vuint8
        #define AMD_FLASH_CELL_BYTES    1
        #define AMD_FLASH_CELL_MASK     0x0
        #define AMD_FLASH_CMD_DATA(x)   ((uint8)x)
    #elif (AMD_FLASH_DEVICES == 2)
        #define AMD_FLASH_BUS_SHIFT     1
        #define AMD_FLASH_CELL          vuint16
        #define AMD_FLASH_CELL_BYTES    2
        #define AMD_FLASH_CELL_MASK     0x1
        #define AMD_FLASH_CMD_DATA(x)   ((uint16)((x<<8)|x))
    #elif (AMD_FLASH_DEVICES == 4)
        #define AMD_FLASH_BUS_SHIFT     2
        #define AMD_FLASH_CELL          vuint32
        #define AMD_FLASH_CELL_BYTES    4
        #define AMD_FLASH_CELL_MASK     0x3
        #define AMD_FLASH_CMD_DATA(x)   ((uint32)((x<<24)|(x<<16)|(x<<8)|x))
    #else
    #error "Unsupported number of Flash devices"
    #endif
#elif defined(AMD_FLASH_16BIT)
    #if (AMD_FLASH_DEVICES == 1)
        #define AMD_FLASH_BUS_SHIFT     1
        #define AMD_FLASH_CELL          vuint16
        #define AMD_FLASH_CELL_BYTES    2
        #define AMD_FLASH_CELL_MASK     0x1
        #define AMD_FLASH_CMD_DATA(x)   ((uint16)x)
    #elif (AMD_FLASH_DEVICES == 2)
        #define AMD_FLASH_BUS_SHIFT     2
        #define AMD_FLASH_CELL          vuint32
        #define AMD_FLASH_CELL_BYTES    4
        #define AMD_FLASH_CELL_MASK     0x3
        #define AMD_FLASH_CMD_DATA(x)   ((uint32)((x<<16)|x))
    #else
    #error "Unsupported number of Flash devices"
    #endif
#elif defined(AMD_FLASH_32BIT)
    #if (AMD_FLASH_DEVICES == 1)
        #define AMD_FLASH_BUS_SHIFT     2
        #define AMD_FLASH_CELL          vuint32
        #define AMD_FLASH_CELL_BYTES    4
        #define AMD_FLASH_CELL_MASK     0x3
        #define AMD_FLASH_CMD_DATA(x)   ((uint32)x)
    #else
    #error "Unsupported number of Flash devices"
    #endif
#else
#error "Unsupported Flash device size"
#endif

/********************************************************************/

#endif /* _AMD_FLASH_H */