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#include <common.h>
ulong myflush (void);
#define FLASH_BANK_SIZE PHYS_FLASH_SIZE
//#define MAIN_SECT_SIZE 0x10000 /* 64 KB */
#define MAIN_SECT_SIZE 0x1000 // 定义为4k，刚好是一个扇区的大小
flash_info_t flash_info[CONFIG_SYS_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
#ifdef CONFIG_SST_39VF1601 //根据SST39VF1601NorFlash芯片添加
#define MEM_FLASH_ADDR1 (*(volatile u16 *)(CONFIG_SYS_FLASH_BASE +(0x000005555<<1)))
#define MEM_FLASH_ADDR2 (*(volatile u16 *)(CONFIG_SYS_FLASH_BASE +(0x000002AAA <<1)))
#else
#define MEM_FLASH_ADDR1 (*(volatile u16 *)(CONFIG_SYS_FLASH_BASE + (0x00000555 << 1)))
#define MEM_FLASH_ADDR2 (*(volatile u16 *)(CONFIG_SYS_FLASH_BASE + (0x000002AA << 1)))
#endif
#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 < CONFIG_SYS_MAX_FLASH_BANKS; i++) {
ulong flashbase = 0;
flash_info[i].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_SST_39VF1601) //仿照LV400添加对SSTVF39VF1601的支持
(SST_MANUFACT & FLASH_VENDMASK) |
(SST_ID_xF1601 & FLASH_TYPEMASK);
#else
#error "Unknown flash configured"
#endif
flash_info[i].size = FLASH_BANK_SIZE;
flash_info[i].sector_count = CONFIG_SYS_MAX_FLASH_SECT;
memset (flash_info[i].protect, 0, CONFIG_SYS_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++) {
#ifndef CONFIG_SST_39VF1601 //相当于注释掉下面的代码
if (j <= 3) {
/* 1st one is 16 KB */
if (j == 0) {
flash_info[i].start[j] =
flashbase + 0;
}
/* 2nd and 3rd are both 8 KB */
if ((j == 1) || (j == 2)) {
flash_info[i].start[j] =
flashbase + 0x4000 + (j -
1) *
0x2000;
}
/* 4th 32 KB */
if (j == 3) {
flash_info[i].start[j] =
flashbase + 0x8000;
}
} else {
flash_info[i].start[j] =
flashbase + (j - 3) * MAIN_SECT_SIZE;
}
#else
flash_info[i].start[j] = flashbase + (j) * MAIN_SECT_SIZE;
#endif
}
size += flash_info[i].size;
}
flash_protect (FLAG_PROTECT_SET,
CONFIG_SYS_FLASH_BASE,
CONFIG_SYS_FLASH_BASE + monitor_flash_len - 1,
&flash_info[0]);
flash_protect (FLAG_PROTECT_SET,
CONFIG_ENV_ADDR,
CONFIG_ENV_ADDR + CONFIG_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;
case (SST_MANUFACT & FLASH_VENDMASK): //添加SST39VF1601支持
printf("SST: ");
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 (SST_ID_xF1601 & FLASH_TYPEMASK): //添加SST39VF1601支持
printf("1x SST39VF1601 (2MB)\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:;
}
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 */
if (info->flash_id == FLASH_UNKNOWN)
return ERR_UNKNOWN_FLASH_TYPE;
if ((s_first < 0) || (s_first > s_last)) {
return ERR_INVAL;
}
#ifdef CONFIG_SST_39VF1601
if((info->flash_id & FLASH_VENDMASK)!=(SST_MANUFACT & FLASH_VENDMASK))
{
return ERR_UNKNOWN_FLASH_VENDOR;
}
#else
if ((info->flash_id & FLASH_VENDMASK) !=
(AMD_MANUFACT & FLASH_VENDMASK)) {
return ERR_UNKNOWN_FLASH_VENDOR;
}
#endif
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 */
vu_short *addr = (vu_short *) (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;
#if 0 //条件编译注释掉
/* wait until flash is ready */
chip = 0;
do {
result = *addr;
/* check timeout */
if (get_timer_masked () >
CONFIG_SYS_FLASH_ERASE_TOUT) {
MEM_FLASH_ADDR1 = CMD_READ_ARRAY;
chip = TMO;
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;
goto outahere;
}
if (chip == TMO) {
rc = ERR_TIMOUT;
goto outahere;
}
printf ("ok.\n");
} else { /* it was protected */
printf ("protected!\n");
}
}
#endif
// 添加下面的代码
while(1)
{
unsigned short i;
i = *((volatile unsigned short *)addr)& 0x40;
if( (*((volatile unsigned short *)addr) & 0x40))
continue;
if((*((volatile unsigned short *)addr)) & 0x80)
break;
}
printf("ok.\n");
}
else
{
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
*/
static int write_hword (flash_info_t * info, ulong dest, ushort data)
{
vu_short *addr = (vu_short *) dest;
ushort result;
int rc = ERR_OK;
int cflag, iflag;
int chip;
/*
* Check if Flash is (sufficiently) erased
*/
result = *addr;
if ((result & 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.
*/
cflag = icache_status ();
icache_disable ();
iflag = disable_interrupts ();
MEM_FLASH_ADDR1 = CMD_UNLOCK1;
MEM_FLASH_ADDR2 = CMD_UNLOCK2;
//MEM_FLASH_ADDR1 = CMD_UNLOCK_BYPASS;
//*addr = CMD_PROGRAM;
*addr = data;
/* arm simple, non interrupt dependent timer */
reset_timer_masked ();
#if 0 //条件编译注释掉
/* wait until flash is ready */
chip = 0;
do {
result = *addr;
/* check timeout */
if (get_timer_masked () > CONFIG_SYS_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);
*addr = CMD_READ_ARRAY;
if (chip == ERR || *addr != data)
rc = ERR_PROG_ERROR;
#endif
//自己添加的代码
while(1)
{
unsigned short i = *(volatile unsigned short *)addr & 0x40;
i = *(volatile unsigned short *)addr & 0x40;
if( (*((volatile unsigned short *)addr) & 0x40))
continue;
if((*((volatile unsigned short *)addr)) & 0x80)
{
rc = ERR_OK;
break;
}
}
printf("ok.\n");
if (iflag)
enable_interrupts ();
if (cflag)
icache_enable ();
return rc;
}
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