u-boot/board/netstar/flash.c
2006-03-11 22:53:33 +01:00

344 lines
7.6 KiB
C

/*
* (C) Copyright 2002
* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
* Alex Zuepke <azu@sysgo.de>
*
* (C) Copyright 2005
* 2N Telekomunikace, a.s. <www.2n.cz>
* Ladislav Michl <michl@2n.cz>
*
* 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
*/
#include <common.h>
/*#if 0 */
#if (PHYS_SDRAM_1_SIZE != SZ_32M)
#include "crcek.h"
#if (CFG_MAX_FLASH_BANKS > 1)
#error There is always only _one_ flash chip
#endif
flash_info_t flash_info[CFG_MAX_FLASH_BANKS];
#define CMD_READ_ARRAY 0x000000f0
#define CMD_UNLOCK1 0x000000aa
#define CMD_UNLOCK2 0x00000055
#define CMD_ERASE_SETUP 0x00000080
#define CMD_ERASE_CONFIRM 0x00000030
#define CMD_PROGRAM 0x000000a0
#define CMD_UNLOCK_BYPASS 0x00000020
#define MEM_FLASH_ADDR1 (*(volatile u16 *)(CFG_FLASH_BASE + (0x00000555 << 1)))
#define MEM_FLASH_ADDR2 (*(volatile u16 *)(CFG_FLASH_BASE + (0x000002aa << 1)))
#define BIT_ERASE_DONE 0x00000080
#define BIT_RDY_MASK 0x00000080
#define BIT_PROGRAM_ERROR 0x00000020
#define BIT_TIMEOUT 0x80000000 /* our flag */
/*-----------------------------------------------------------------------
*/
ulong flash_init(void)
{
int i;
flash_info[0].flash_id = (AMD_MANUFACT & FLASH_VENDMASK) |
(AMD_ID_LV800B & FLASH_TYPEMASK);
flash_info[0].size = PHYS_FLASH_1_SIZE;
flash_info[0].sector_count = CFG_MAX_FLASH_SECT;
memset(flash_info[0].protect, 0, CFG_MAX_FLASH_SECT);
for (i = 0; i < flash_info[0].sector_count; i++) {
switch (i) {
case 0: /* 16kB */
flash_info[0].start[0] = CFG_FLASH_BASE;
break;
case 1: /* 8kB */
flash_info[0].start[1] = CFG_FLASH_BASE + 0x4000;
break;
case 2: /* 8kB */
flash_info[0].start[2] = CFG_FLASH_BASE + 0x4000 +
0x2000;
break;
case 3: /* 32 KB */
flash_info[0].start[3] = CFG_FLASH_BASE + 0x4000 +
2 * 0x2000;
break;
case 4:
flash_info[0].start[4] = CFG_FLASH_BASE + 0x4000 +
2 * 0x2000 + 0x8000;
break;
default: /* 64kB */
flash_info[0].start[i] = flash_info[0].start[i-1] +
0x10000;
break;
}
}
/* U-Boot */
flash_protect(FLAG_PROTECT_SET,
LOADER1_OFFSET,
LOADER1_OFFSET + LOADER_SIZE - 1, flash_info);
/* Protect crcek, env and r_env as well */
flash_protect(FLAG_PROTECT_SET, 0, 0x8000 - 1, flash_info);
return flash_info[0].size;
}
/*-----------------------------------------------------------------------
*/
void flash_print_info(flash_info_t *info)
{
int i;
switch (info->flash_id & FLASH_VENDMASK) {
case (AMD_MANUFACT & FLASH_VENDMASK):
puts("AMD: ");
break;
default:
puts("Unknown vendor ");
break;
}
switch (info->flash_id & FLASH_TYPEMASK) {
case (AMD_ID_LV800B & FLASH_TYPEMASK):
puts("AM29LV800BB (8Mb)\n");
break;
default:
puts("Unknown chip type\n");
return;
}
printf(" Size: %ld MB in %d sectors\n",
info->size >> 20, info->sector_count);
puts(" Sector start addresses:");
for (i = 0; i < info->sector_count; i++) {
if ((i % 5) == 0)
puts("\n ");
printf(" %08lX%s", info->start[i],
info->protect[i] ? " (RO)" : " ");
}
puts("\n");
}
/*-----------------------------------------------------------------------
*/
int flash_erase(flash_info_t *info, int s_first, int s_last)
{
ushort result;
int prot, sect;
int rc = ERR_OK;
/* first look for protection bits */
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) !=
(AMD_MANUFACT & FLASH_VENDMASK))
return ERR_UNKNOWN_FLASH_VENDOR;
prot = 0;
for (sect = s_first; sect <= s_last; ++sect)
if (info->protect[sect])
prot++;
if (prot)
printf("- Warning: %d protected sectors will not be erased!\n",
prot);
else
putc('\n');
/* Start erase on unprotected sectors */
for (sect = s_first; sect <= s_last && !ctrlc (); sect++) {
if (info->protect[sect] == 0) { /* not protected */
vu_short *addr = (vu_short *) (info->start[sect]);
/* arm simple, non interrupt dependent timer */
reset_timer_masked();
MEM_FLASH_ADDR1 = CMD_UNLOCK1;
MEM_FLASH_ADDR2 = CMD_UNLOCK2;
MEM_FLASH_ADDR1 = CMD_ERASE_SETUP;
MEM_FLASH_ADDR1 = CMD_UNLOCK1;
MEM_FLASH_ADDR2 = CMD_UNLOCK2;
*addr = CMD_ERASE_CONFIRM;
/* wait until flash is ready */
while (1) {
result = *addr;
/* check timeout */
if (get_timer_masked() > CFG_FLASH_ERASE_TOUT) {
MEM_FLASH_ADDR1 = CMD_READ_ARRAY;
rc = ERR_TIMOUT;
break;
}
if ((result & 0xfff) & BIT_ERASE_DONE)
break;
if ((result & 0xffff) & BIT_PROGRAM_ERROR) {
rc = ERR_PROG_ERROR;
break;
}
}
MEM_FLASH_ADDR1 = CMD_READ_ARRAY;
if (rc != ERR_OK)
goto out;
putc('.');
}
}
out:
/* allow flash to settle - wait 10 ms */
udelay_masked(10000);
return rc;
}
/*-----------------------------------------------------------------------
* Copy memory to flash
*/
static int write_hword(flash_info_t *info, ulong dest, ushort data)
{
vu_short *addr = (vu_short *) dest;
ushort result;
int rc = ERR_OK;
/* check if flash is (sufficiently) erased */
result = *addr;
if ((result & data) != data)
return ERR_NOT_ERASED;
MEM_FLASH_ADDR1 = CMD_UNLOCK1;
MEM_FLASH_ADDR2 = CMD_UNLOCK2;
MEM_FLASH_ADDR1 = CMD_PROGRAM;
*addr = data;
/* arm simple, non interrupt dependent timer */
reset_timer_masked();
/* wait until flash is ready */
while (1) {
result = *addr;
/* check timeout */
if (get_timer_masked () > CFG_FLASH_ERASE_TOUT) {
rc = ERR_TIMOUT;
break;
}
if ((result & 0x80) == (data & 0x80))
break;
if ((result & 0xffff) & BIT_PROGRAM_ERROR) {
result = *addr;
if ((result & 0x80) != (data & 0x80))
rc = ERR_PROG_ERROR;
}
}
*addr = CMD_READ_ARRAY;
if (*addr != data)
rc = ERR_PROG_ERROR;
return rc;
}
/*-----------------------------------------------------------------------
* Copy memory to flash.
*/
int write_buff(flash_info_t *info, uchar *src, ulong addr, ulong cnt)
{
ulong cp, wp;
int l;
int i, rc;
ushort data;
wp = (addr & ~1); /* get lower word aligned address */
/*
* handle unaligned start bytes
*/
if ((l = addr - wp) != 0) {
data = 0;
for (i = 0, cp = wp; i < l; ++i, ++cp)
data = (data >> 8) | (*(uchar *) cp << 8);
for (; i < 2 && cnt > 0; ++i) {
data = (data >> 8) | (*src++ << 8);
--cnt;
++cp;
}
for (; cnt == 0 && i < 2; ++i, ++cp)
data = (data >> 8) | (*(uchar *) cp << 8);
if ((rc = write_hword(info, wp, data)) != 0)
return (rc);
wp += 2;
}
/*
* handle word aligned part
*/
while (cnt >= 2) {
data = *((vu_short *) src);
if ((rc = write_hword(info, wp, data)) != 0)
return (rc);
src += 2;
wp += 2;
cnt -= 2;
}
if (cnt == 0)
return ERR_OK;
/*
* handle unaligned tail bytes
*/
data = 0;
for (i = 0, cp = wp; i < 2 && cnt > 0; ++i, ++cp) {
data = (data >> 8) | (*src++ << 8);
--cnt;
}
for (; i < 2; ++i, ++cp)
data = (data >> 8) | (*(uchar *) cp << 8);
return write_hword(info, wp, data);
}
#endif