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u-boot/board/lubbock/flash.c
wdenk ea8015b852 Initial revision
2002-10-26 16:43:06 +00:00

364 lines
8.3 KiB
C
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/*
* (C) Copyright 2002
* Kyle Harris, Nexus Technologies, Inc. kharris@nexus-tech.net
*
* (C) Copyright 2002
* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
* Marius Groeger <mgroeger@sysgo.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
*/
#include <common.h>
#define FLASH_BANK_SIZE 0x2000000
#define MAIN_SECT_SIZE 0x40000 /* 2x16 = 256k per sector */
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 =
(INTEL_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);
switch (i)
{
case 0:
flashbase = PHYS_FLASH_1;
break;
case 1:
flashbase = PHYS_FLASH_2;
break;
default:
panic("configured to many flash banks!\n");
break;
}
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 + _armboot_end_data - _armboot_start,
&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, j;
for (j=0; j<CFG_MAX_FLASH_BANKS; j++)
{
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_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");
info++;
}
Done:
}
/*-----------------------------------------------------------------------
*/
int flash_erase (flash_info_t *info, int s_first, int s_last)
{
int flag, prot, sect;
int rc = ERR_OK;
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;
}
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();
/* Start erase on unprotected sectors */
for (sect = s_first; sect<=s_last && !ctrlc(); sect++) {
printf("Erasing sector %2d ... ", sect);
/* arm simple, non interrupt dependent timer */
reset_timer_masked();
if (info->protect[sect] == 0) { /* not protected */
vu_short *addr = (vu_short *)(info->start[sect]);
*addr = 0x20; /* erase setup */
*addr = 0xD0; /* erase confirm */
while ((*addr & 0x80) != 0x80) {
if (get_timer_masked() > CFG_FLASH_ERASE_TOUT) {
*addr = 0xB0; /* suspend erase */
*addr = 0xFF; /* reset to read mode */
rc = ERR_TIMOUT;
goto outahere;
}
}
/* clear status register command */
*addr = 0x50;
/* reset to read mode */
*addr = 0xFF;
}
printf("ok.\n");
}
if (ctrlc())
printf("User Interrupt!\n");
outahere:
/* 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)
{
vu_short *addr = (vu_short *)dest, val;
int rc = ERR_OK;
int flag;
/* Check if Flash is (sufficiently) erased
*/
if ((*addr & data) != data)
return ERR_NOT_ERASED;
/*
* 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();
/* clear status register command */
*addr = 0x50;
/* program set-up command */
*addr = 0x40;
/* latch address/data */
*addr = data;
/* arm simple, non interrupt dependent timer */
reset_timer_masked();
/* wait while polling the status register */
while(((val = *addr) & 0x80) != 0x80)
{
if (get_timer_masked() > CFG_FLASH_WRITE_TOUT) {
rc = ERR_TIMOUT;
/* suspend program command */
*addr = 0xB0;
goto outahere;
}
}
if(val & 0x1A) { /* check for error */
printf("\nFlash write error %02x at address %08lx\n",
(int)val, (unsigned long)dest);
if(val & (1<<3)) {
printf("Voltage range error.\n");
rc = ERR_PROG_ERROR;
goto outahere;
}
if(val & (1<<1)) {
printf("Device protect error.\n");
rc = ERR_PROTECTED;
goto outahere;
}
if(val & (1<<4)) {
printf("Programming error.\n");
rc = ERR_PROG_ERROR;
goto outahere;
}
rc = ERR_PROG_ERROR;
goto outahere;
}
outahere:
/* read array command */
*addr = 0xFF;
if (flag)
enable_interrupts();
return rc;
}
/*-----------------------------------------------------------------------
* 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 */
/*
* 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) {
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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