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smaeul-u-boot/board/armadillo/flash.c
Wolfgang Denk b8e16a3450 Cleanup
2005-10-06 23:44:55 +02:00

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/*
* (C) Copyright 2002
* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
* Marius Groeger <mgroeger@sysgo.de>
*
* (C) Copyright 2005 Rowel Atienza <rowel@diwalabs.com>
* Flash driver for armadillo board HT1070
*
* 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>
#define FLASH_BANK_SIZE 0x400000
/*value used by hermit is 0x200*/
/*document says sector size is either 64k in low mem reg and 8k in high mem reg*/
#define MAIN_SECT_SIZE 0x10000
#define UNALIGNED_MASK (3)
#define FL_WORD(addr) (*(volatile unsigned short*)(addr))
#define FLASH_TIMEOUT 20000000
flash_info_t flash_info[CFG_MAX_FLASH_BANKS];
/*-----------------------------------------------------------------------
*/
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 = (FUJ_MANUFACT & FLASH_VENDMASK);
/*(INTEL_ID_28F128J3 & 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 = PHYS_FLASH_1;
else
panic ("configured too many flash banks!\n");
for (j = 0; j < flash_info[i].sector_count; j++) {
flash_info[i].start[j] =
flashbase + j * MAIN_SECT_SIZE;
}
size += flash_info[i].size;
}
/* Protect monitor and environment sectors
*/
flash_protect (FLAG_PROTECT_SET,
CFG_FLASH_BASE,
CFG_FLASH_BASE + monitor_flash_len - 1,
&flash_info[0]);
flash_protect (FLAG_PROTECT_SET,
CFG_ENV_ADDR,
CFG_ENV_ADDR + CFG_ENV_SIZE - 1, &flash_info[0]);
return size;
}
/*-----------------------------------------------------------------------
*/
void flash_print_info (flash_info_t * info)
{
int i;
switch (info->flash_id & FLASH_VENDMASK) {
case (FUJ_MANUFACT & FLASH_VENDMASK):
printf ("Fujitsu: ");
break;
default:
printf ("Unknown Vendor ");
break;
}
/*
switch (info->flash_id & FLASH_TYPEMASK) {
case (INTEL_ID_28F128J3 & FLASH_TYPEMASK):
printf ("28F128J3 (128Mbit)\n");
break;
default:
printf ("Unknown Chip Type\n");
goto Done;
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");
/*
Done: ;
*/
}
/*
* * Loop until both write state machines complete.
* */
static unsigned short flash_status_wait (unsigned long addr,
unsigned short value)
{
unsigned short status;
long timeout = FLASH_TIMEOUT;
while (((status = (FL_WORD (addr))) != value) && timeout > 0) {
timeout--;
}
return status;
}
/*
* Loop until the Write State machine is ready, then do a full error
* check. Clear status and leave the flash in Read Array mode; return
* 0 for no error, -1 for error.
*/
static int flash_status_full_check (unsigned long addr, unsigned short value1,
unsigned short value2)
{
unsigned short status1, status2;
status1 = flash_status_wait (addr, value1);
status2 = flash_status_wait (addr + 2, value2);
return (status1 != value1 || status2 != value2) ? -1 : 0;
}
/*-----------------------------------------------------------------------
*/
int flash_erase (flash_info_t * info, int s_first, int s_last)
{
int flag, prot, sect;
int rc = ERR_OK;
unsigned long base;
unsigned long addr;
if ((info->flash_id & FLASH_VENDMASK) !=
(FUJ_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)
return ERR_PROTECTED;
/*
* Disable interrupts which might cause a timeout
* here. Remember that our exception vectors are
* at address 0 in the flash, and we don't want a
* (ticker) exception to happen while the flash
* chip is in programming mode.
*/
flag = disable_interrupts ();
printf ("Erasing %d sectors starting at sector %2d.\n"
"This make take some time ... ",
s_last - s_first, sect);
/* Start erase on unprotected sectors */
for (sect = s_first; sect <= s_last && !ctrlc (); sect++) {
/* ARM simple, non interrupt dependent timer */
reset_timer_masked ();
if (info->protect[sect] == 0) { /* not protected */
addr = sect * MAIN_SECT_SIZE;
addr &= ~(unsigned long) UNALIGNED_MASK; /* word align */
base = addr & 0xF0000000;
FL_WORD (base + (0x555 << 1)) = 0xAA;
FL_WORD (base + (0x2AA << 1)) = 0x55;
FL_WORD (base + (0x555 << 1)) = 0x80;
FL_WORD (base + (0x555 << 1)) = 0xAA;
FL_WORD (base + (0x2AA << 1)) = 0x55;
FL_WORD (addr) = 0x30;
if (flash_status_full_check (addr, 0xFFFF, 0xFFFF))
return ERR_PROTECTED;
}
}
printf ("\nDone.\n");
if (ctrlc ())
printf ("User Interrupt!\n");
/* allow flash to settle - wait 10 ms */
udelay_masked (10000);
if (flag)
enable_interrupts ();
return rc;
}
/*-----------------------------------------------------------------------
* Copy memory to flash
*/
static int write_word (flash_info_t * info, ulong dest, ushort data)
{
int flag;
unsigned long base;
/* Check if Flash is (sufficiently) erased
*/
if ((FL_WORD (dest) & data) != data)
return ERR_NOT_ERASED;
/*if(dest & UNALIGNED_MASK) return ERR_ALIGN; */
/*
* Disable interrupts which might cause a timeout
* here. Remember that our exception vectors are
* at address 0 in the flash, and we don't want a
* (ticker) exception to happen while the flash
* chip is in programming mode.
*/
flag = disable_interrupts ();
/* arm simple, non interrupt dependent timer */
reset_timer_masked ();
base = dest & 0xF0000000;
FL_WORD (base + (0x555 << 1)) = 0xAA;
FL_WORD (base + (0x2AA << 1)) = 0x55;
FL_WORD (base + (0x555 << 1)) = 0xA0;
FL_WORD (dest) = data;
/*printf("writing 0x%p = 0x%x\n",dest,data); */
if (flash_status_wait (dest, data) != data)
return ERR_PROG_ERROR;
if (flag)
enable_interrupts ();
return ERR_OK;
}
/*-----------------------------------------------------------------------
* Copy memory to flash.
*/
int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
{
ulong cp, wp;
ushort data;
int l;
int i, rc;
wp = (addr & ~1); /* get lower word aligned address */
printf ("Writing %d short data to 0x%p from 0x%p.\n ", cnt, wp, src);
/*
* 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_word (info, wp, data)) != 0) {
return (rc);
}
wp += 2;
}
/*
* handle word aligned part
*/
while (cnt >= 2) {
data = *((vu_short *) src);
if ((rc = write_word (info, wp, data)) != 0) {
return (rc);
}
src += 2;
wp += 2;
cnt -= 2;
}
if (cnt == 0) {
printf ("\nDone.\n");
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_word (info, wp, data);
}
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