/*
* address format
* 17 16 9 8 0
* --------------------------------------------
* | block(12bit) | page(5bit) | offset(9bit) |
* --------------------------------------------
*/
static int nandll_read_page (uchar *buf, ulong addr, int large_block) 1page=4k
{
int i;
int page_size = 512;
if (large_block==1)
page_size = 2048;
if (large_block==2)
page_size = 4096;
if(large_block==3)
page_size = 8192;
NAND_ENABLE_CE();
NFCMD_REG = NAND_CMD_READ0;
/* Write Address */
NFADDR_REG = 0;
if (large_block)
NFADDR_REG = 0;
NFADDR_REG = (addr) & 0xff;
NFADDR_REG = (addr >> 8) & 0xff;
NFADDR_REG = (addr >> 16) & 0xff;
if (large_block)
NFCMD_REG = NAND_CMD_READSTART;
NF_TRANSRnB();
/* for compatibility(2460). u32 cannot be used. by scsuh */
for(i=0; i < page_size; i++) {
*buf++ = NFDATA8_REG; 4096
}
NAND_DISABLE_CE();
return 0;
}
/*
* Read data from NAND.
*/
static int nandll_read_blocks (ulong dst_addr, ulong size, int large_block) 1block=128k
{
uchar *buf = (uchar *)dst_addr;
int i;
uint page_shift = 9;
if (large_block==1)
page_shift = 11;
if(large_block==2)
page_shift = 12;
if(large_block==3)
page_shift =13;
if(large_block == 2)
{
/* Read pages */
for (i = 0; i < 4; i++, buf+=(1<<(page_shift-1))) {
nandll_read_page(buf, i, large_block);
}
/* Read pages */
for (i = 4; i < (0x3c000>>page_shift); i++, buf+=(1<<page_shift)) {
nandll_read_page(buf, i, large_block); 60
}
}else if(large_block == 3) //K9GAG08U0E
{
/* Read pages */
for (i = 0; i < 4; i++, buf+=(1<<(page_shift-2))) {
nandll_read_page(buf, i, large_block);
}
/* Read pages */
for (i = 4; i < (0x3c000>>page_shift); i++, buf+=(1<<page_shift)) {
nandll_read_page(buf, i, large_block);
}
}
else
{
for (i = 0; i < (0x3c000>>page_shift); i++, buf+=(1<<page_shift)) {
nandll_read_page(buf, i, large_block);
}
}
return 0;
}
int copy_uboot_to_ram (void)
{
int large_block = 0;
int i;
vu_char id;
NAND_ENABLE_CE(); 宏，片选有效，Xm0CSn2
NFCMD_REG=NAND_CMD_RESET; command 0xff，初始值为0x00，为什么要赋值，不清楚
NF_TRANSRnB(); 等待nand就绪
NFCMD_REG = NAND_CMD_READID; 0x90
NFADDR_REG = 0x00; address
NF_TRANSRnB(); 等待nand就绪
/* wait for a while */
for (i=0; i<200; i++);
int factory = NFDATA8_REG;
id = NFDATA8_REG;
int cellinfo=NFDATA8_REG;
int tmp= NFDATA8_REG;
//int childType=tmp & 0x03; //Page size
int childType=cellinfo; //Page size
if (id > 0x80)
{
large_block = 1;
}
if(id == 0xd5 && childType==0x94 )//K9GAG08U0D
{
large_block = 2;
}
if(id == 0xd5 && childType==0x14 )//K9GAG08U0M
{
large_block = 2;
}
if(id == 0xd5 && childType==0x84 )//K9GAG08U0E
{
large_block = 3;
}
if(id==0xd7)//K9LBG08U0D
{
large_block = 2;
}
if(factory==0x2c && id == 0x48) //MT29F16G08ABACAWP
{
large_block = 2;
}if(factory==0x2c && id == 0x38) //MT29F8G08ABABAWP 选择
{
large_block = 2;
}
/* read NAND Block.
* 128KB ->240KB because of U-Boot size increase. by scsuh
* So, read 0x3c000 bytes not 0x20000(128KB). 读240k
*/
return nandll_read_blocks(CFG_PHY_UBOOT_BASE, 0x3c000, large_block);
}
#if 1
#define REG_GPFCON (0x7F0080A0)
#define REG_GPFDAT (0x7F0080A4)
void beep(void)
{
uint reg_f_cfg=readl(REG_GPFCON) & 0x3FFFFFFF | (1<<30);
writel(reg_f_cfg,REG_GPFCON);
uint reg_f_on=readl(REG_GPFDAT) & 0xFFFF7FFF | (1<<15);
uint reg_f_off=readl(REG_GPFDAT) & 0xFFFF7FFF;
writel(reg_f_on,REG_GPFDAT);
}
#else
void beep(void)
{
}
#endif
#endif