u-boot/board/csb226/flash.c

367 lines
8.2 KiB
C
Raw Normal View History

2002-11-03 00:30:25 +00:00
/*
* (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>
*
* (C) Copyright 2002
* Robert Schwebel, Pengutronix, <r.schwebel@pengutronix.de>
*
* (C) Copyright 2003 (2 x 16 bit Flash bank patches)
* Rolf Peukert, IMMS gGmbH, <rolf.peukert@imms.de>
*
2002-11-03 00:30:25 +00:00
* 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
2002-11-03 00:30:25 +00:00
* 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>
#include <asm/arch/pxa-regs.h>
2002-11-03 00:30:25 +00:00
#define FLASH_BANK_SIZE 0x02000000
#define MAIN_SECT_SIZE 0x40000 /* 2x16 = 256k per sector */
2002-11-03 00:30:25 +00:00
flash_info_t flash_info[CFG_MAX_FLASH_BANKS];
2002-11-03 00:30:25 +00:00
/**
* flash_init: - initialize data structures for flash chips
*
* @return: size of the flash
2002-11-03 00:30:25 +00:00
*/
ulong flash_init(void)
{
int i, j;
ulong size = 0;
2002-11-03 00:30:25 +00:00
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);
2002-11-03 00:30:25 +00:00
switch (i) {
case 0:
flashbase = PHYS_FLASH_1;
break;
default:
panic("configured too 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;
2002-11-03 00:30:25 +00:00
}
/* Protect monitor and environment sectors */
flash_protect(FLAG_PROTECT_SET,
CFG_FLASH_BASE,
CFG_FLASH_BASE + monitor_flash_len - 1,
&flash_info[0]);
2002-11-03 00:30:25 +00:00
flash_protect(FLAG_PROTECT_SET,
CFG_ENV_ADDR,
CFG_ENV_ADDR + CFG_ENV_SIZE - 1,
&flash_info[0]);
2002-11-03 00:30:25 +00:00
return size;
2002-11-03 00:30:25 +00:00
}
/**
* flash_print_info: - print information about the flash situation
2002-11-03 00:30:25 +00:00
*/
2002-11-03 00:30:25 +00:00
void flash_print_info (flash_info_t *info)
{
int i, j;
2002-11-03 00:30:25 +00:00
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;
}
2002-11-03 00:30:25 +00:00
switch (info->flash_id & FLASH_TYPEMASK) {
case (INTEL_ID_28F128J3 & FLASH_TYPEMASK):
printf("28F128J3 (128Mbit)\n");
break;
default:
printf("Unknown Chip Type\n");
return;
}
2002-11-03 00:30:25 +00:00
printf(" Size: %ld MB in %d Sectors\n",
info->size >> 20, info->sector_count);
2002-11-03 00:30:25 +00:00
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++;
}
2002-11-03 00:30:25 +00:00
}
/**
* flash_erase: - erase flash sectors
2002-11-03 00:30:25 +00:00
*/
int flash_erase(flash_info_t *info, int s_first, int s_last)
2002-11-03 00:30:25 +00:00
{
int flag, prot, sect;
int rc = ERR_OK;
2002-11-03 00:30:25 +00:00
if (info->flash_id == FLASH_UNKNOWN)
return ERR_UNKNOWN_FLASH_TYPE;
2002-11-03 00:30:25 +00:00
if ((s_first < 0) || (s_first > s_last)) {
return ERR_INVAL;
}
2002-11-03 00:30:25 +00:00
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++;
2002-11-03 00:30:25 +00:00
}
if (prot) return ERR_PROTECTED;
2002-11-03 00:30:25 +00:00
/*
* 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.
*/
2002-11-03 00:30:25 +00:00
flag = disable_interrupts();
2002-11-03 00:30:25 +00:00
/* Start erase on unprotected sectors */
for (sect = s_first; sect<=s_last && !ctrlc(); sect++) {
2002-11-03 00:30:25 +00:00
printf("Erasing sector %2d ... ", sect);
2002-11-03 00:30:25 +00:00
/* arm simple, non interrupt dependent timer */
reset_timer_masked();
if (info->protect[sect] == 0) { /* not protected */
u32 * volatile addr = (u32 * volatile)(info->start[sect]);
/* erase sector: */
/* The strata flashs are aligned side by side on */
/* the data bus, so we have to write the commands */
/* to both chips here: */
2002-11-03 00:30:25 +00:00
*addr = 0x00200020; /* erase setup */
*addr = 0x00D000D0; /* erase confirm */
2002-11-03 00:30:25 +00:00
while ((*addr & 0x00800080) != 0x00800080) {
if (get_timer_masked() > CFG_FLASH_ERASE_TOUT) {
*addr = 0x00B000B0; /* suspend erase*/
*addr = 0x00FF00FF; /* read mode */
rc = ERR_TIMOUT;
goto outahere;
}
}
*addr = 0x00500050; /* clear status register cmd. */
*addr = 0x00FF00FF; /* reset to read mode */
}
printf("ok.\n");
}
if (ctrlc()) printf("User Interrupt!\n");
2002-11-03 00:30:25 +00:00
outahere:
/* allow flash to settle - wait 10 ms */
udelay_masked(10000);
2002-11-03 00:30:25 +00:00
if (flag) enable_interrupts();
2002-11-03 00:30:25 +00:00
return rc;
2002-11-03 00:30:25 +00:00
}
/**
* write_long: - copy memory to flash, assume a bank of 2 devices with 16bit each
2002-11-03 00:30:25 +00:00
*/
static int write_long (flash_info_t *info, ulong dest, ulong data)
2002-11-03 00:30:25 +00:00
{
u32 * volatile addr = (u32 * volatile)dest, val;
int rc = ERR_OK;
int flag;
2002-11-03 00:30:25 +00:00
/* read array command - just for the case... */
*addr = 0x00FF00FF;
/* Check if Flash is (sufficiently) erased */
if ((*addr & data) != data) return ERR_NOT_ERASED;
2002-11-03 00:30:25 +00:00
/*
* 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();
2002-11-03 00:30:25 +00:00
/* clear status register command */
*addr = 0x00500050;
2002-11-03 00:30:25 +00:00
/* program set-up command */
*addr = 0x00400040;
2002-11-03 00:30:25 +00:00
/* latch address/data */
*addr = data;
2002-11-03 00:30:25 +00:00
/* arm simple, non interrupt dependent timer */
reset_timer_masked();
2002-11-03 00:30:25 +00:00
/* wait while polling the status register */
while(((val = *addr) & 0x00800080) != 0x00800080) {
if (get_timer_masked() > CFG_FLASH_WRITE_TOUT) {
rc = ERR_TIMOUT;
/* suspend program command */
*addr = 0x00B000B0;
goto outahere;
}
2002-11-03 00:30:25 +00:00
}
/* check for errors */
if(val & 0x001A001A) {
printf("\nFlash write error %02x at address %08lx\n",
(int)val, (unsigned long)dest);
if(val & 0x00080008) {
printf("Voltage range error.\n");
rc = ERR_PROG_ERROR;
goto outahere;
}
if(val & 0x00020002) {
printf("Device protect error.\n");
rc = ERR_PROTECTED;
goto outahere;
}
if(val & 0x00100010) {
printf("Programming error.\n");
rc = ERR_PROG_ERROR;
goto outahere;
}
rc = ERR_PROG_ERROR;
goto outahere;
}
outahere:
/* read array command */
*addr = 0x00FF00FF;
if (flag) enable_interrupts();
2002-11-03 00:30:25 +00:00
return rc;
2002-11-03 00:30:25 +00:00
}
/**
* write_buf: - Copy memory to flash.
*
* @param info:
* @param src: source of copy transaction
* @param addr: where to copy to
* @param cnt: number of bytes to copy
*
* @return error code
2002-11-03 00:30:25 +00:00
*/
/* "long" version, uses 32bit words */
2002-11-03 00:30:25 +00:00
int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
{
ulong cp, wp;
ulong data;
int l;
int i, rc;
wp = (addr & ~3); /* 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 << 24);
}
for (; i<4 && cnt>0; ++i) {
data = (data >> 8) | (*src++ << 24);
--cnt;
++cp;
}
for (; cnt==0 && i<4; ++i, ++cp) {
data = (data >> 8) | (*(uchar *)cp << 24);
}
2002-11-03 00:30:25 +00:00
if ((rc = write_long(info, wp, data)) != 0) {
return (rc);
}
wp += 4;
2002-11-03 00:30:25 +00:00
}
/*
* handle word aligned part
*/
while (cnt >= 4) {
data = *((ulong*)src);
if ((rc = write_long(info, wp, data)) != 0) {
return (rc);
}
src += 4;
wp += 4;
cnt -= 4;
2002-11-03 00:30:25 +00:00
}
if (cnt == 0) return ERR_OK;
2002-11-03 00:30:25 +00:00
/*
* handle unaligned tail bytes
*/
data = 0;
for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
data = (data >> 8) | (*src++ << 24);
--cnt;
}
for (; i<4; ++i, ++cp) {
data = (data >> 8) | (*(uchar *)cp << 24);
}
return write_long(info, wp, data);
2002-11-03 00:30:25 +00:00
}