/*
* flash.c: Support code for the flash chips on the Xilinx ML2 board
*
* Copyright 2002 Mind NV
*
* http://www.mind.be/
*
* Author : Peter De Schrijver (p2@mind.be)
*
* This software may be used and distributed according to the terms of
* the GNU General Public License (GPL) version 2, incorporated herein by
* reference. Drivers based on or derived from this code fall under the GPL
* and must retain the authorship, copyright and this license notice. This
* file is not a complete program and may only be used when the entire program
* is licensed under the GPL.
*
*/
#include <common.h>
#include <asm/u-boot.h>
#include <configs/ML2.h>
#define FLASH_BANK_SIZE (64*1024*1024)
flash_info_t flash_info[CFG_MAX_FLASH_BANKS];
#define SECT_SIZE (512*1024)
#define CMD_READ_ARRAY 0x00FF00FF00FF00FULL
#define CMD_IDENTIFY 0x0090009000900090ULL
#define CMD_ERASE_SETUP 0x0020002000200020ULL
#define CMD_ERASE_CONFIRM 0x00D000D000D000D0ULL
#define CMD_PROGRAM 0x0040004000400040ULL
#define CMD_RESUME 0x00D000D000D000D0ULL
#define CMD_SUSPEND 0x00B000B000B000B0ULL
#define CMD_STATUS_READ 0x0070007000700070ULL
#define CMD_STATUS_RESET 0x0050005000500050ULL
#define BIT_BUSY 0x0080008000800080ULL
#define BIT_ERASE_SUSPEND 0x004000400400040ULL
#define BIT_ERASE_ERROR 0x0020002000200020ULL
#define BIT_PROGRAM_ERROR 0x0010001000100010ULL
#define BIT_VPP_RANGE_ERROR 0x0008000800080008ULL
#define BIT_PROGRAM_SUSPEND 0x0004000400040004ULL
#define BIT_PROTECT_ERROR 0x0002000200020002ULL
#define BIT_UNDEFINED 0x0001000100010001ULL
#define BIT_SEQUENCE_ERROR 0x0030003000300030ULL
#define BIT_TIMEOUT 0x80000000
inline void eieio(void) {
__asm__ __volatile__ ("eieio" : : : "memory");
}
ulong flash_init(void) {
int i, j;
ulong size = 0;
for(i=0;i<CFG_MAX_FLASH_BANKS;i++) {
ulong flashbase = 0;
flash_info[i].flash_id = (INTEL_MANUFACT & FLASH_VENDMASK) |
(INTEL_ID_28F128J3A & FLASH_TYPEMASK);
flash_info[i].size = FLASH_BANK_SIZE;
flash_info[i].sector_count = CFG_MAX_FLASH_SECT;
memset(flash_info[i].protect, 0, CFG_MAX_FLASH_SECT);
if (i==0)
flashbase = CFG_FLASH_BASE;
else
panic("configured to many flash banks!\n");
for (j = 0; j < flash_info[i].sector_count; j++)
flash_info[i].start[j]=flashbase + j * SECT_SIZE;
size += flash_info[i].size;
}
return size;
}
void flash_print_info (flash_info_t *info) {
int i;
switch (info->flash_id & FLASH_VENDMASK) {
case (INTEL_MANUFACT & FLASH_VENDMASK):
printf("Intel: ");
break;
default:
printf("Unknown Vendor ");
break;
}
switch (info->flash_id & FLASH_TYPEMASK) {
case (INTEL_ID_28F128J3A & FLASH_TYPEMASK):
printf("4x 28F128J3A (128Mbit)\n");
break;
default:
printf("Unknown Chip Type\n");
break;
}
printf(" Size: %ld MB in %d Sectors\n", info->size >> 20, info->sector_count);
printf(" Sector Start Addresses:");
for (i = 0; i < info->sector_count; i++) {
if ((i % 5) == 0)
printf("\n ");
printf (" %08lX%s", info->start[i],
info->protect[i] ? " (RO)" : " ");
}
printf ("\n");
}
int flash_error (unsigned long long code) {
if (code & BIT_TIMEOUT) {
printf ("Timeout\n");
return ERR_TIMOUT;
}
if (~code & BIT_BUSY) {
printf ("Busy\n");
return ERR_PROG_ERROR;
}
if (code & BIT_VPP_RANGE_ERROR) {
printf ("Vpp range error\n");
return ERR_PROG_ERROR;
}
if (code & BIT_PROTECT_ERROR) {
printf ("Device protect error\n");
return ERR_PROG_ERROR;
}
if (code & BIT_SEQUENCE_ERROR) {
printf ("Command seqence error\n");
return ERR_PROG_ERROR;
}
if (code & BIT_ERASE_ERROR) {
printf ("Block erase error\n");
return ERR_PROG_ERROR;
}
if (code & BIT_PROGRAM_ERROR) {
printf ("Program error\n");
return ERR_PROG_ERROR;
}
if (code & BIT_ERASE_SUSPEND) {
printf ("Block erase suspended\n");
return ERR_PROG_ERROR;
}
if (code & BIT_PROGRAM_SUSPEND) {
printf ("Program suspended\n");
return ERR_PROG_ERROR;
}
return ERR_OK;
}
int flash_erase (flash_info_t *info, int s_first, int s_last) {
int rc = ERR_OK;
int sect;
unsigned long long result;
if (info->flash_id == FLASH_UNKNOWN)
return ERR_UNKNOWN_FLASH_TYPE;
if ((s_first < 0) || (s_first > s_last))
return ERR_INVAL;
if ((info->flash_id & FLASH_VENDMASK) != (INTEL_MANUFACT & FLASH_VENDMASK))
return ERR_UNKNOWN_FLASH_VENDOR;
for (sect=s_first; sect<=s_last; ++sect)
if (info->protect[sect])
return ERR_PROTECTED;
for (sect = s_first; sect<=s_last && !ctrlc(); sect++) {
volatile unsigned long long *addr=
(unsigned long long *)(info->start[sect]);
printf("Erasing sector %2d ... ", sect);
*addr=CMD_STATUS_RESET;
eieio();
*addr=CMD_ERASE_SETUP;
eieio();
*addr=CMD_ERASE_CONFIRM;
eieio();
do {
result = *addr;
} while(~result & BIT_BUSY);
*addr=CMD_READ_ARRAY;
if ((rc = flash_error(result)) == ERR_OK)
printf("ok.\n");
else
break;
}
if (ctrlc())
printf("User Interrupt!\n");
return rc;
}
volatile static int write_word (flash_info_t *info, ulong dest, unsigned long long data) {
volatile unsigned long long *addr=(unsigned long long *)dest;
unsigned long long result;
int rc = ERR_OK;
result=*addr;
if ((result & data) != data)
return ERR_NOT_ERASED;
*addr=CMD_STATUS_RESET;
eieio();
*addr=CMD_PROGRAM;
eieio();
*addr=data;
eieio();
do {
result=*addr;
} while(~result & BIT_BUSY);
*addr=CMD_READ_ARRAY;
rc = flash_error(result);
return rc;
}
int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt) {
ulong cp, wp;
unsigned long long data;
int l;
int i,rc;
wp=(addr & ~7);
if((l=addr-wp) != 0) {
data=0;
for(i=0,cp=wp;i<l;++i,++cp)
data = (data >> 8) | (*(uchar *)cp << 24);
for (; i<8 && cnt>0; ++i) {
data = (data >> 8) | (*src++ << 24);
--cnt;
++cp;
}
for (; i<8; ++i, ++cp)
data = (data >> 8) | (*(uchar *)cp << 24);
if ((rc = write_word(info, wp, data)) != 0)
return rc;
wp+=8;
}
while(cnt>=8) {
data=*((unsigned long long *)src);
if ((rc = write_word(info, wp, data)) != 0)
return rc;
src+=8;
wp+=8;
cnt-=8;
}
if(cnt == 0)
return ERR_OK;
data = 0;
for (i=0, cp=wp; i<8 && cnt>0; ++i, ++cp) {
data = (data >> 8) | (*src++ << 24);
--cnt;
}
for (; i<8; ++i, ++cp) {
data = (data >> 8) | (*(uchar *)cp << 24);
}
return write_word(info, wp, data);
}
