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Merge branch 'master' of git://git.denx.de/u-boot-cfi-flash

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This commit is contained in:
Wolfgang Denk 2009-01-27 20:54:33 +01:00
commit cb9f622a28
1 changed files with 40 additions and 10 deletions
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50
drivers/mtd/cfi_flash.c
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@ -774,17 +774,26 @@ static void flash_add_byte (flash_info_t * info, cfiword_t * cword, uchar c)
} }
} }
/* loop through the sectors from the highest address when the passed /*
* address is greater or equal to the sector address we have a match * Loop through the sector table starting from the previously found sector.
* Searches forwards or backwards, dependent on the passed address.
*/ */
static flash_sect_t find_sector (flash_info_t * info, ulong addr) static flash_sect_t find_sector (flash_info_t * info, ulong addr)
{ {
flash_sect_t sector; static flash_sect_t saved_sector = 0; /* previously found sector */
flash_sect_t sector = saved_sector;
for (sector = info->sector_count - 1; sector >= 0; sector--) { while ((info->start[sector] < addr)
if (addr >= info->start[sector]) && (sector < info->sector_count - 1))
break; sector++;
} while ((info->start[sector] > addr) && (sector > 0))
/*
* also decrements the sector in case of an overshot
* in the first loop
*/
sector--;
saved_sector = sector;
return sector; return sector;
} }
@ -795,7 +804,8 @@ static int flash_write_cfiword (flash_info_t * info, ulong dest,
{ {
void *dstaddr; void *dstaddr;
int flag; int flag;
flash_sect_t sect; flash_sect_t sect = 0;
char sect_found = 0;
dstaddr = map_physmem(dest, info->portwidth, MAP_NOCACHE); dstaddr = map_physmem(dest, info->portwidth, MAP_NOCACHE);
@ -840,6 +850,7 @@ static int flash_write_cfiword (flash_info_t * info, ulong dest,
sect = find_sector(info, dest); sect = find_sector(info, dest);
flash_unlock_seq (info, sect); flash_unlock_seq (info, sect);
flash_write_cmd (info, sect, info->addr_unlock1, AMD_CMD_WRITE); flash_write_cmd (info, sect, info->addr_unlock1, AMD_CMD_WRITE);
sect_found = 1;
break; break;
} }
@ -864,8 +875,10 @@ static int flash_write_cfiword (flash_info_t * info, ulong dest,
unmap_physmem(dstaddr, info->portwidth); unmap_physmem(dstaddr, info->portwidth);
return flash_full_status_check (info, find_sector (info, dest), if (!sect_found)
info->write_tout, "write"); sect = find_sector (info, dest);
return flash_full_status_check (info, sect, info->write_tout, "write");
} }
#ifdef CONFIG_SYS_FLASH_USE_BUFFER_WRITE #ifdef CONFIG_SYS_FLASH_USE_BUFFER_WRITE
@ -1795,6 +1808,20 @@ static void flash_fixup_atmel(flash_info_t *info, struct cfi_qry *qry)
cfi_reverse_geometry(qry); cfi_reverse_geometry(qry);
} }
static void flash_fixup_stm(flash_info_t *info, struct cfi_qry *qry)
{
/* check if flash geometry needs reversal */
if (qry->num_erase_regions > 1) {
/* reverse geometry if top boot part */
if (info->cfi_version < 0x3131) {
/* CFI < 1.1, guess by device id (only M29W320ET now) */
if (info->device_id == 0x2256) {
cfi_reverse_geometry(qry);
}
}
}
}
/* /*
* The following code cannot be run from FLASH! * The following code cannot be run from FLASH!
* *
@ -1868,6 +1895,9 @@ ulong flash_get_size (ulong base, int banknum)
case 0x001f: case 0x001f:
flash_fixup_atmel(info, &qry); flash_fixup_atmel(info, &qry);
break; break;
case 0x0020:
flash_fixup_stm(info, &qry);
break;
} }
debug ("manufacturer is %d\n", info->vendor); debug ("manufacturer is %d\n", info->vendor);