/*
* (C) Copyright 2002
* Sysgo Real-Time Solutions, GmbH <
www.elinos.com>
* Alex Zuepke <[url=mailto:azu@sysgo.de]azu@sysgo.de[/url]>
*
* 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>
ulong myflush (void);
#define FLASH_BANK_SIZE PHYS_FLASH_SIZE
#define MAIN_SECT_SIZE 0x10000 /* 64 KB */
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 */
#define READY 1
#define ERR 2
#define TMO 4
/*-----------------------------------------------------------------------
*/
ulong flash_init (void)
{
int i, j;
ulong size = 0;
for (i = 0; i < CFG_MAX_FLASH_BANKS; i++) {
ulong flashbase = 0;
flash_info
.flash_id =
#if defined(CONFIG_AMD_LV400)
(AMD_MANUFACT & FLASH_VENDMASK) |
(AMD_ID_LV400B & FLASH_TYPEMASK);
#elif defined(CONFIG_AMD_LV800)
(AMD_MANUFACT & FLASH_VENDMASK) |
(AMD_ID_LV800B & FLASH_TYPEMASK);
#elif defined(CONFIG_AMD_LV160DB)
(AMD_MANUFACT & FLASH_VENDMASK) |
(AMD_ID_LV160B & FLASH_TYPEMASK);
#else
#error "Unknown flash configured"
#endif
flash_info.size = FLASH_BANK_SIZE;
flash_info.sector_count = CFG_MAX_FLASH_SECT;
memset (flash_info.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.sector_count; j++) {
if (j <= 3) {
/* 1st one is 16 KB */
if (j == 0) {
flash_info.start[j] =
flashbase + 0;
}
/* 2nd and 3rd are both 8 KB */
if ((j == 1) || (j == 2)) {
flash_info.start[j] =
flashbase + 0x4000 + (j -
1) *
0x2000;
}
/* 4th 32 KB */
if (j == 3) {
flash_info.start[j] =
flashbase + 0x8000;
}
} else {
flash_info.start[j] =
flashbase + (j - 3) * MAIN_SECT_SIZE;
}
}
size += flash_info.size;
}
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 (AMD_MANUFACT & FLASH_VENDMASK):
printf ("AMD: ");
break;
default:
printf ("Unknown Vendor ");
break;
}
switch (info->flash_id & FLASH_TYPEMASK) {
case (AMD_ID_LV400B & FLASH_TYPEMASK):
printf ("1x Amd29LV400BB (4Mbit)\n");
break;
case (AMD_ID_LV800B & FLASH_TYPEMASK):
printf ("1x Amd29LV800BB (8Mbit)\n");
break;
case (AMD_ID_LV160B & FLASH_TYPEMASK):
printf ("1x Amd29LV160D (16Mbit)\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,
info->protect ? " (RO)" : " ");
}
printf ("\n");
Done:;
}
/*-----------------------------------------------------------------------
*/
int flash_erase (flash_info_t * info, int s_first, int s_last)
{
ushort result;
int iflag, cflag, prot, sect;
int rc = ERR_OK;
int chip;
/* first look for protection bits */
//printf("s_first:%d \t s_last:%d\n",s_first,s_last);
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)
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.
*/
cflag = icache_status ();
icache_disable ();
iflag = 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 */
unsigned char *addr = (unsigned char *) (info->start[sect]);
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 */
chip = 0;
do {
result = *addr;
/* check timeout */
if (get_timer_masked () >
CFG_FLASH_ERASE_TOUT) {
MEM_FLASH_ADDR1 = CMD_READ_ARRAY;
chip = TMO;
//printf("timeout:TOUT\n");
break;
}
if (!chip
&& (result & 0xFFFF) & BIT_ERASE_DONE)
chip = READY;
if (!chip
&& (result & 0xFFFF) & BIT_PROGRAM_ERROR)
chip = ERR;
} while (!chip);
MEM_FLASH_ADDR1 = CMD_READ_ARRAY;
if (chip == ERR) {
rc = ERR_PROG_ERROR;
//printf("ERRrc:%d\n",rc);
goto outahere;
}
if (chip == TMO) {
rc = ERR_TIMOUT;
//printf("TMOrc:%d\n",rc);
goto outahere;
}
printf ("ok.\n");
} else
{ /* it was protected */
printf ("protected!\n");
}
}
if (ctrlc ())
printf ("User Interrupt!\n");
outahere:
/* allow flash to settle - wait 10 ms */
udelay_masked (10000);
if (iflag)
enable_interrupts ();
if (cflag)
icache_enable ();
return rc;
}
/*-----------------------------------------------------------------------
* Copy memory to flash
*/
volatile static int write_hword (flash_info_t * info, ulong dest, ushort data)
{
//printf("write_hword\n");
//vu_short *addr = (vu_short *) dest;
u8 *addr = (u8*) dest;
//printf("addr:%p,data:%d\n",addr,data);
ushort result;
int rc = ERR_OK;
int cflag, iflag;
int chip;
/*
* Check if Flash is (sufficiently) erased
*/
result = *addr;
if ((result & data) != data)
{
//printf("ERR_NOT_ERASED\n");
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.
*/
cflag = icache_status ();
icache_disable ();
iflag = disable_interrupts ();
/*原烧写串指令*/
MEM_FLASH_ADDR1 = CMD_UNLOCK1;
MEM_FLASH_ADDR2 = CMD_UNLOCK2;
MEM_FLASH_ADDR1 = CMD_UNLOCK_BYPASS;
*addr = CMD_PROGRAM;
*addr = data;
/******************/
/*改写烧写串指令
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 */
chip = 0;
do {
result = *addr;
//printf("chip:%d,result:%d\n",chip,result);
/* check timeout */
if (get_timer_masked () > CFG_FLASH_ERASE_TOUT) {
chip = ERR | TMO;
break;
}
if (!chip && ((result & 0x80) == (data & 0x80)))
chip = READY;
if (!chip && ((result & 0xFFFF) & BIT_PROGRAM_ERROR))
{
result = *addr;
if ((result & 0x80) == (data & 0x80))
chip = READY;
else
chip = ERR;
}
} while (!chip);
//printf("chip:%d\n",chip);
*addr = CMD_READ_ARRAY;
if (chip == ERR || *addr != data)
rc = ERR_PROG_ERROR;
if (iflag)
enable_interrupts ();
if (cflag)
icache_enable ();
return rc;
}
/*-----------------------------------------------------------------------
* Copy memory to flash.
*/
int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
{
//printf("write_buff\n");
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) {
//printf("rc:%d\n",rc);
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);
}
以上是u-boot 中的flash.c文件,根据韦东山那本书的.
烧写到nor flash后,
100ask> erase 1f0000 1fffff
Erasing sector 34 ... ok.
Erased 1 sectors
100ask> cp.b 32000000 1f0000 1024
Copy to Flash... General Flash Programming Error
我想烧写flash可是老是失败.
同样保存参数也失败
100ask> setenv ipaddr 192.168.1.22
100ask> saveenv
Saving Environment to Flash...
Un-Protected 1 sectors
Erasing Flash...s_first:33 s_last:33
Erasing sector 33 ... ok.
Erased 1 sectors
Writing to Flash... write_hword
addr:001e0000,data:40428
rc:128
General Flash Programming Error
Protected 1 sectors
100ask>
因为是调用了里面的write_hword函数写nor .
测试了好久都搞不定,希望哪位指点一下..谢谢!
