u-boot/board/innokom/flash.c
Wolfgang Denk 700a0c648d Add common (with Linux) MTD partition scheme and "mtdparts" command
Old, obsolete and duplicated code was cleaned up and replace by the
new partitioning method. There are two possible approaches now:
* define a single, static partition
* use mtdparts command line option and dynamic partitioning
Default is static partitioning.
2005-08-08 01:03:24 +02:00

419 lines
9 KiB
C

/*
* (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 2002
* Auerswald GmbH & Co KG, Germany
* Kai-Uwe Bloem <kai-uwe.bloem@auerswald.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>
#include <asm/arch/pxa-regs.h>
/* Debugging macros ------------------------------------------------------ */
#undef FLASH_DEBUG
/* Some debug macros */
#if (FLASH_DEBUG > 2 )
#define PRINTK3(args...) printf(args)
#else
#define PRINTK3(args...)
#endif
#if FLASH_DEBUG > 1
#define PRINTK2(args...) printf(args)
#else
#define PRINTK2(args...)
#endif
#ifdef FLASH_DEBUG
#define PRINTK(args...) printf(args)
#else
#define PRINTK(args...)
#endif
/* ------------------------------------------------------------------------ */
/* Development system: we have only 16 MB Flash */
#ifdef CONFIG_MTD_INNOKOM_16MB
#define FLASH_BANK_SIZE 0x01000000 /* 16 MB (during development) */
#define MAIN_SECT_SIZE 0x00020000 /* 128k per sector */
#endif
/* Production system: we have 64 MB Flash */
#ifdef CONFIG_MTD_INNOKOM_64MB
#define FLASH_BANK_SIZE 0x04000000 /* 64 MB */
#define MAIN_SECT_SIZE 0x00020000 /* 128k per sector */
#endif
flash_info_t flash_info[CFG_MAX_FLASH_BANKS];
/**
* flash_init: - initialize data structures for flash chips
*
* @return: size of the flash
*/
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;
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;
}
/* Protect u-boot sectors */
flash_protect(FLAG_PROTECT_SET,
CFG_FLASH_BASE,
CFG_FLASH_BASE + (256*1024) - 1,
&flash_info[0]);
#ifdef CFG_ENV_IS_IN_FLASH
flash_protect(FLAG_PROTECT_SET,
CFG_ENV_ADDR,
CFG_ENV_ADDR + CFG_ENV_SIZE - 1,
&flash_info[0]);
#endif
return size;
}
/**
* flash_print_info: - print information about the flash situation
*
* @param info:
*/
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");
return;
}
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++;
}
}
/**
* flash_erase: - erase flash sectors
*
*/
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);
PRINTK("\n");
/* arm simple, non interrupt dependent timer */
reset_timer_masked();
if (info->protect[sect] == 0) { /* not protected */
u16 * volatile addr = (u16 * volatile)(info->start[sect]);
PRINTK("unlocking sector\n");
*addr = 0x0060;
*addr = 0x00d0;
*addr = 0x00ff;
PRINTK("erasing sector\n");
*addr = 0x0020;
PRINTK("confirming erase\n");
*addr = 0x00D0;
while ((*addr & 0x0080) != 0x0080) {
PRINTK(".");
if (get_timer_masked() > CFG_FLASH_ERASE_TOUT) {
*addr = 0x00B0; /* suspend erase*/
*addr = 0x00FF; /* read mode */
rc = ERR_TIMOUT;
goto outahere;
}
}
PRINTK("clearing status register\n");
*addr = 0x0050;
PRINTK("resetting to read mode");
*addr = 0x00FF;
}
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;
}
/**
* write_word: - copy memory to flash
*
* @param info:
* @param dest:
* @param data:
* @return:
*/
static int write_word (flash_info_t *info, ulong dest, ushort data)
{
volatile u16 *addr = (u16 *)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;
*addr = 0xB0; /* suspend program command */
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:
*addr = 0xFF; /* read array command */
if (flag) enable_interrupts();
return rc;
}
/**
* 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
*/
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 = *((vushort*)src); */
data = *((ushort*)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);
}