u-boot/common/flash.c
Eugene OBrien d2f6800662 ppc4xx: Update AMCC Bamboo 440EP support
Changed storage type of cfg_simulate_spd_eeprom to const
Changed storage type of gpio_tab to stack storage
(Cannot access global data declarations in .bss until afer code relocation)

Improved SDRAM tests to catch problems where data is not uniquely addressable
(e.g. incorrectly programmed SDRAM row or columns)

Added CONFIG_PROG_SDRAM_TLB to support Bamboo SIMM/DIMM modules
Fixed AM29LV320DT (OpCode Flash) sector map

Signed-off-by: Eugene OBrien <eugene.obrien@advantechamt.com>
Signed-off-by: Stefan Roese <sr@denx.de>
2007-07-31 10:24:56 +02:00

228 lines
6 KiB
C

/*
* (C) Copyright 2000
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
/* #define DEBUG */
#include <common.h>
#include <flash.h>
#if !defined(CFG_NO_FLASH)
extern flash_info_t flash_info[]; /* info for FLASH chips */
/*-----------------------------------------------------------------------
* Functions
*/
/*-----------------------------------------------------------------------
* Set protection status for monitor sectors
*
* The monitor is always located in the _first_ Flash bank.
* If necessary you have to map the second bank at lower addresses.
*/
void
flash_protect (int flag, ulong from, ulong to, flash_info_t *info)
{
ulong b_end = info->start[0] + info->size - 1; /* bank end address */
short s_end = info->sector_count - 1; /* index of last sector */
int i;
/* Do nothing if input data is bad. */
if (info->sector_count == 0 || info->size == 0 || to < from) {
return;
}
debug ("flash_protect %s: from 0x%08lX to 0x%08lX\n",
(flag & FLAG_PROTECT_SET) ? "ON" :
(flag & FLAG_PROTECT_CLEAR) ? "OFF" : "???",
from, to);
/* There is nothing to do if we have no data about the flash
* or the protect range and flash range don't overlap.
*/
if (info->flash_id == FLASH_UNKNOWN ||
to < info->start[0] || from > b_end) {
return;
}
for (i=0; i<info->sector_count; ++i) {
ulong end; /* last address in current sect */
end = (i == s_end) ? b_end : info->start[i + 1] - 1;
/* Update protection if any part of the sector
* is in the specified range.
*/
if (from <= end && to >= info->start[i]) {
if (flag & FLAG_PROTECT_CLEAR) {
#if defined(CFG_FLASH_PROTECTION)
flash_real_protect(info, i, 0);
#else
info->protect[i] = 0;
#endif /* CFG_FLASH_PROTECTION */
debug ("protect off %d\n", i);
}
else if (flag & FLAG_PROTECT_SET) {
#if defined(CFG_FLASH_PROTECTION)
flash_real_protect(info, i, 1);
#else
info->protect[i] = 1;
#endif /* CFG_FLASH_PROTECTION */
debug ("protect on %d\n", i);
}
}
}
}
/*-----------------------------------------------------------------------
*/
flash_info_t *
addr2info (ulong addr)
{
#ifndef CONFIG_SPD823TS
flash_info_t *info;
int i;
for (i=0, info=&flash_info[0]; i<CFG_MAX_FLASH_BANKS; ++i, ++info) {
if (info->flash_id != FLASH_UNKNOWN &&
addr >= info->start[0] &&
/* WARNING - The '- 1' is needed if the flash
* is at the end of the address space, since
* info->start[0] + info->size wraps back to 0.
* Please don't change this unless you understand this.
*/
addr <= info->start[0] + info->size - 1) {
return (info);
}
}
#endif /* CONFIG_SPD823TS */
return (NULL);
}
/*-----------------------------------------------------------------------
* Copy memory to flash.
* Make sure all target addresses are within Flash bounds,
* and no protected sectors are hit.
* Returns:
* ERR_OK 0 - OK
* ERR_TIMOUT 1 - write timeout
* ERR_NOT_ERASED 2 - Flash not erased
* ERR_PROTECTED 4 - target range includes protected sectors
* ERR_INVAL 8 - target address not in Flash memory
* ERR_ALIGN 16 - target address not aligned on boundary
* (only some targets require alignment)
*/
int
flash_write (char *src, ulong addr, ulong cnt)
{
#ifdef CONFIG_SPD823TS
return (ERR_TIMOUT); /* any other error codes are possible as well */
#else
int i;
ulong end = addr + cnt - 1;
flash_info_t *info_first = addr2info (addr);
flash_info_t *info_last = addr2info (end );
flash_info_t *info;
if (cnt == 0) {
return (ERR_OK);
}
if (!info_first || !info_last) {
return (ERR_INVAL);
}
for (info = info_first; info <= info_last; ++info) {
ulong b_end = info->start[0] + info->size; /* bank end addr */
short s_end = info->sector_count - 1;
for (i=0; i<info->sector_count; ++i) {
ulong e_addr = (i == s_end) ? b_end : info->start[i + 1];
if ((end >= info->start[i]) && (addr < e_addr) &&
(info->protect[i] != 0) ) {
return (ERR_PROTECTED);
}
}
}
/* finally write data to flash */
for (info = info_first; info <= info_last && cnt>0; ++info) {
ulong len;
len = info->start[0] + info->size - addr;
if (len > cnt)
len = cnt;
if ((i = write_buff(info, (uchar *)src, addr, len)) != 0) {
return (i);
}
cnt -= len;
addr += len;
src += len;
}
return (ERR_OK);
#endif /* CONFIG_SPD823TS */
}
/*-----------------------------------------------------------------------
*/
void flash_perror (int err)
{
switch (err) {
case ERR_OK:
break;
case ERR_TIMOUT:
puts ("Timeout writing to Flash\n");
break;
case ERR_NOT_ERASED:
puts ("Flash not Erased\n");
break;
case ERR_PROTECTED:
puts ("Can't write to protected Flash sectors\n");
break;
case ERR_INVAL:
puts ("Outside available Flash\n");
break;
case ERR_ALIGN:
puts ("Start and/or end address not on sector boundary\n");
break;
case ERR_UNKNOWN_FLASH_VENDOR:
puts ("Unknown Vendor of Flash\n");
break;
case ERR_UNKNOWN_FLASH_TYPE:
puts ("Unknown Type of Flash\n");
break;
case ERR_PROG_ERROR:
puts ("General Flash Programming Error\n");
break;
default:
printf ("%s[%d] FIXME: rc=%d\n", __FILE__, __LINE__, err);
break;
}
}
/*-----------------------------------------------------------------------
*/
#endif /* !CFG_NO_FLASH */