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16853c48af
xburst-tools/nandprog/jz4740/nandflash_4740.c
xiangfu 5c31ed05b7 add nand flash tools
2009-04-05 16:26:33 +00:00

735 lines
14 KiB
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/*
* Common NAND Flash operations for JZ4740.
*
* This software is free.
*/
#include "jz4740.h"
#include "include.h"
extern struct nand_oobinfo oob_64[];
#define __nand_enable() (REG_EMC_NFCSR |= EMC_NFCSR_NFE1 | EMC_NFCSR_NFCE1)
#define __nand_disable() (REG_EMC_NFCSR &= ~(EMC_NFCSR_NFCE1|EMC_NFCSR_NFE1 ))
#define __nand_ecc_rs_encoding() (REG_EMC_NFECR = EMC_NFECR_ECCE | EMC_NFECR_ERST | EMC_NFECR_RS | EMC_NFECR_RS_ENCODING)
#define __nand_ecc_rs_decoding() (REG_EMC_NFECR = EMC_NFECR_ECCE | EMC_NFECR_ERST | EMC_NFECR_RS | EMC_NFECR_RS_DECODING)
#define __nand_ecc_disable() (REG_EMC_NFECR &= ~EMC_NFECR_ECCE)
#define __nand_ecc_encode_sync() while (!(REG_EMC_NFINTS & EMC_NFINTS_ENCF))
#define __nand_ecc_decode_sync() while (!(REG_EMC_NFINTS & EMC_NFINTS_DECF))
#define __nand_ecc_enable() (REG_EMC_NFECR = EMC_NFECR_ECCE | EMC_NFECR_ERST )
#define __nand_ecc_disable() (REG_EMC_NFECR &= ~EMC_NFECR_ECCE)
#define __nand_select_hm_ecc() (REG_EMC_NFECR &= ~EMC_NFECR_RS )
#define __nand_select_rs_ecc() (REG_EMC_NFECR |= EMC_NFECR_RS)
#define __nand_read_hm_ecc() (REG_EMC_NFECC & 0x00ffffff)
#define __nand_ecc() (REG_EMC_NFECC & 0x00ffffff)
#define __nand_cmd(n) (REG8(cmdport+csn) = (n))
#define __nand_addr(n) (REG8(addrport+csn) = (n))
#define __nand_data8() REG8(dataport+csn)
#define __nand_data16() REG16(dataport+csn)
#define CMD_READA 0x00
#define CMD_READB 0x01
#define CMD_READC 0x50
#define CMD_ERASE_SETUP 0x60
#define CMD_ERASE 0xD0
#define CMD_READ_STATUS 0x70
#define CMD_CONFIRM 0x30
#define CMD_SEQIN 0x80
#define CMD_PGPROG 0x10
#define CMD_READID 0x90
#define OOB_BAD_OFF 0x00
#define OOB_ECC_OFF 0x04
#define OP_ERASE 0
#define OP_WRITE 1
#define OP_READ 2
#define ECC_BLOCK 512
#define ECC_POS 6
#define PAR_SIZE 9
static volatile unsigned char *gpio_base;
static volatile unsigned char *emc_base;
static volatile unsigned char *addrport;
static volatile unsigned char *dataport;
static volatile unsigned char *cmdport;
unsigned int EMC_BASE;
unsigned int GPIO_BASE;
static int bus = 8, row = 2, pagesize = 512, oobsize = 16, ppb = 32;
static u32 bad_block_pos = 0,bad_block_page=0, csn = 0;
static u8 badbuf[2048 + 64] = {0};
static u8 data_buf[2048] = {0};
static u8 oob_buf[128] = {0};
static struct nand_oobinfo *oob_pos;
static np_data *np;
static inline void __nand_sync(void)
{
unsigned int timeout = 1000;
while ((REG_GPIO_PXPIN(2) & 0x40000000) && timeout--);
while (!(REG_GPIO_PXPIN(2) & 0x40000000));
}
static int read_oob(u8 *buf, u32 size, u32 pg);
static int nand_data_write8(unsigned char *buf, int count);
static int nand_data_write16(unsigned char *buf, int count);
static int nand_data_read8(unsigned char *buf, int count);
static int nand_data_read16(unsigned char *buf, int count);
static int (*write_proc)(unsigned char *, int) = 0;
static int (*read_proc)(unsigned char *, int) = 0;
extern void dumpbuf(u8 *p, int count);
unsigned int nand_query_4740(void)
{
u16 vid, did;
__nand_sync();
__nand_cmd(CMD_READID);
__nand_addr(0);
vid = __nand_data8();
did = __nand_data8();
return (vid << 16) | did;
}
int chip_select_4740(u8 cs)
{
csn = (u32)cs << 15; // modify this number for your board
return 0;
}
int nand_init_4740(np_data *npp)
{
bus = npp->bw;
row = npp->rc;
pagesize = npp->ps;
oobsize = npp->os;
ppb = npp->ppb;
bad_block_pos = npp->bbp;
bad_block_page = npp->bba;
gpio_base = (u8 *)npp->gpio_map;
emc_base = (u8 *)npp->base_map;
dataport = (u8 *)npp->port_map;
addrport = (u8 *)((u32)dataport + npp->ap_offset);
cmdport = (u8 *)((u32)dataport + npp->cp_offset);
EMC_BASE = (u32)emc_base;
GPIO_BASE = (u32)gpio_base;
/* Initialize NAND Flash Pins */
// __gpio_as_nand();
// __nand_enable();
chip_select_4740(npp->cs);
if (bus == 8) {
write_proc = nand_data_write8;
read_proc = nand_data_read8;
} else {
write_proc = nand_data_write16;
read_proc = nand_data_read16;
}
oob_pos = &oob_64[npp->ep];
// REG_EMC_SMCR1 = 0x0fff7700;
np = npp;
return 0;
}
int nand_fini_4740(void)
{
__nand_disable();
return 0;
}
/*
* Read oob <pagenum> pages from <startpage> page.
* Don't skip bad block.
* Don't use HW ECC.
*/
int nand_read_oob_4740(u8 *buf, u32 startpage, u32 pagenum)
{
u32 cnt, cur_page;
u8 *tmpbuf;
tmpbuf = (u8 *)buf;
cur_page = startpage;
cnt = 0;
while (cnt < pagenum) {
read_oob((void *)tmpbuf, oobsize, cur_page);
tmpbuf += oobsize;
cur_page++;
cnt++;
}
return 0;
}
int nand_check_block_4740(u32 block)
{
u32 pg;
pg = block * ppb + bad_block_page;
read_oob(oob_buf, oobsize, pg);
if (oob_buf[bad_block_pos] != 0xff)
return -1;
read_oob(oob_buf, oobsize, pg + 1);
if (oob_buf[bad_block_pos] != 0xff)
return -1;
return 0;
}
/*
* Mark a block bad.
*/
void nand_block_markbad_4740(u32 block)
{
u32 i, rowaddr;
for (i = 0; i < pagesize + oobsize; i++)
badbuf[i] = 0x00;
badbuf[pagesize + bad_block_pos] = 0; /* bad block flag */
rowaddr = block * ppb + bad_block_page;
//bad block ID locate No.bad_block_page page
__nand_cmd(CMD_READA);
__nand_cmd(CMD_SEQIN);
__nand_addr(0);
if (pagesize == 2048)
__nand_addr(0);
for (i = 0; i < row; i++) {
__nand_addr(rowaddr & 0xff);
rowaddr >>= 8;
}
write_proc((unsigned char *)badbuf, pagesize + oobsize);
__nand_cmd(CMD_PGPROG);
__nand_sync();
}
/*
* Read data <pagenum> pages from <startpage> page.
* Don't skip bad block.
* Don't use HW ECC.
*/
int nand_read_raw_4740(u8 *buf, u32 startpage, u32 pagenum)
{
u32 cnt, j;
u32 cur_page, rowaddr;
u8 *tmpbuf;
tmpbuf = (u8 *)buf;
cur_page = startpage;
cnt = 0;
while (cnt < pagenum) {
__nand_sync();
__nand_cmd(CMD_READA);
__nand_addr(0);
if (pagesize == 2048)
__nand_addr(0);
rowaddr = cur_page;
for (j = 0; j < row; j++) {
__nand_addr(rowaddr & 0xff);
rowaddr >>= 8;
}
if (pagesize == 2048)
__nand_cmd(CMD_CONFIRM);
__nand_sync();
read_proc(tmpbuf, pagesize);
tmpbuf += pagesize;
cur_page++;
cnt++;
}
return 0;
}
int nand_erase_4740(int blk_num, int sblk, int force)
{
int i, j;
u32 cur, rowaddr;
cur = sblk * ppb;
for (i = 0; i < blk_num; i++) {
rowaddr = cur;
if (!force) { /* if set, erase anything */
/* test Badflag. */
__nand_sync();
__nand_cmd(CMD_READA);
__nand_addr(0);
if (pagesize == 2048)
__nand_addr(0);
for (j=0;j<row;j++) {
__nand_addr(rowaddr & 0xff);
rowaddr >>= 8;
}
if (pagesize == 2048)
__nand_cmd(CMD_CONFIRM);
__nand_sync();
read_proc((u8 *)data_buf, pagesize);
read_proc((u8 *)oob_buf, oobsize);
if (oob_buf[0] != 0xff) { /* Bad block, skip */
cur += ppb;
continue;
}
rowaddr = cur;
}
__nand_cmd(CMD_ERASE_SETUP);
for (j = 0; j < row; j++) {
__nand_addr(rowaddr & 0xff);
rowaddr >>= 8;
}
__nand_cmd(CMD_ERASE);
__nand_sync();
__nand_cmd(CMD_READ_STATUS);
if (__nand_data8() & 0x01)
{
/* Erase Error, mark it as bad block */
nand_block_markbad(cur);
} else ;
cur += ppb;
}
return 0;
}
static int read_oob(u8 *buf, u32 size, u32 pg)
{
u32 i, coladdr, rowaddr;
if (pagesize == 512)
coladdr = 0;
else
coladdr = pagesize;
if (pagesize == 512)
/* Send READOOB command */
__nand_cmd(CMD_READC);
else
/* Send READ0 command */
__nand_cmd(CMD_READA);
/* Send column address */
__nand_addr(coladdr & 0xff);
if (pagesize != 512)
__nand_addr(coladdr >> 8);
/* Send page address */
rowaddr = pg;
for (i = 0; i < row; i++) {
__nand_addr(rowaddr & 0xff);
rowaddr >>= 8;
}
/* Send READSTART command for 2048 ps NAND */
if (pagesize != 512)
__nand_cmd(CMD_CONFIRM);
/* Wait for device ready */
__nand_sync();
/* Read oob data */
read_proc(buf, size);
return 0;
}
/* Correct 1~9-bit errors in 512-bytes data */
static void rs_correct(unsigned char *dat, int idx, int mask)
{
int i;
idx--;
i = idx + (idx >> 3);
if (i >= 512)
return;
mask <<= (idx & 0x7);
dat[i] ^= mask & 0xff;
if (i < 511)
dat[i+1] ^= (mask >> 8) & 0xff;
}
static int nand_hm_correct_data(u8 *dat, u8 *oob_s, u8 *calc_ecc,u8 p)
{
u8 a, b, c, d1, d2, d3, add, bit, i;
u8 *e1,*e2,*e3;
e1 = &oob_s[oob_pos->eccpos[p+0]];
e2 = &oob_s[oob_pos->eccpos[p+1]];
e3 = &oob_s[oob_pos->eccpos[p+2]];
// printf("read ecc :%x %x %x %d %d\n",*e1,*e2,*e3,
// oob_pos->eccpos[p+0],oob_pos->eccpos[p+1]);
d1 = calc_ecc[0] ^ *e1;
d2 = calc_ecc[1] ^ *e2;
d3 = calc_ecc[2] ^ *e3;
if ((d1 | d2 | d3) == 0) {
/* No errors */
return 0;
}
else {
a = (d1 ^ (d1 >> 1)) & 0x55;
b = (d2 ^ (d2 >> 1)) & 0x55;
c = (d3 ^ (d3 >> 1)) & 0x54;
/* Found and will correct single bit error in the data */
if ((a == 0x55) && (b == 0x55) && (c == 0x54)) {
c = 0x80;
add = 0;
a = 0x80;
for (i=0; i<4; i++) {
if (d1 & c)
add |= a;
c >>= 2;
a >>= 1;
}
c = 0x80;
for (i=0; i<4; i++) {
if (d2 & c)
add |= a;
c >>= 2;
a >>= 1;
}
bit = 0;
b = 0x04;
c = 0x80;
for (i=0; i<3; i++) {
if (d3 & c)
bit |= b;
c >>= 2;
b >>= 1;
}
b = 0x01;
a = dat[add];
a ^= (b << bit);
dat[add] = a;
return 0;
}
else {
i = 0;
while (d1) {
if (d1 & 0x01)
++i;
d1 >>= 1;
}
while (d2) {
if (d2 & 0x01)
++i;
d2 >>= 1;
}
while (d3) {
if (d3 & 0x01)
++i;
d3 >>= 1;
}
if (i == 1) {
/* ECC Code Error Correction */
*e1 = calc_ecc[0];
*e2 = calc_ecc[1];
*e3 = calc_ecc[2];
return 0;
}
else {
/* Uncorrectable Error */
// printf("uncorrectable ECC error\n");
return -1;
}
}
}
/* Should never happen */
return -1;
}
/*
* Read data <pagenum> pages from <startpage> page.
* HW ECC is used.
*/
int nand_read_4740_hm(u8 *buf, u32 startpage, u32 pagenum)
{
u32 j, calc_ecc;
u32 cur_page, cnt, rowaddr, ecccnt;
u8 *tmpbuf;
ecccnt = pagesize / 256;
cur_page = startpage;
cnt = 0;
while (cnt < pagenum) {
/* read oob first */
read_oob(oob_buf, oobsize, cur_page);
__nand_sync();
__nand_cmd(CMD_READA);
__nand_addr(0);
if (pagesize == 2048)
__nand_addr(0);
rowaddr = cur_page;
for (j = 0; j < row; j++) {
__nand_addr(rowaddr & 0xff);
rowaddr >>= 8;
}
if (pagesize == 2048)
__nand_cmd(CMD_CONFIRM);
__nand_sync();
tmpbuf = (u8 *)((u32)buf + cnt * ( pagesize+oobsize));
for (j = 0; j < ecccnt ; j++)
{
__nand_ecc_enable();
__nand_select_hm_ecc();
read_proc(tmpbuf, 256);
__nand_ecc_disable();
calc_ecc = __nand_read_hm_ecc();
if (oob_pos->eccname == LINUXHM)
calc_ecc = ~calc_ecc | 0x00030000;
nand_hm_correct_data(tmpbuf,oob_buf,(u8*)&calc_ecc,j*3);
tmpbuf += 256;
}
for (j = 0; j < oobsize; j++)
tmpbuf[j] = oob_buf[j];
cur_page++;
cnt++;
}
return 0;
}
/*
* Read data <pagenum> pages from <startpage> page.
* HW ECC is used.
*/
int nand_read_4740_rs(u8 *buf, u32 startpage, u32 pagenum)
{
u32 j, k;
u32 cur_page, cnt, rowaddr, ecccnt;
u8 *tmpbuf;
ecccnt = pagesize / ECC_BLOCK;
cur_page = startpage;
cnt = 0;
while (cnt < pagenum) {
/* read oob first */
read_oob(oob_buf, oobsize, cur_page);
__nand_sync();
__nand_cmd(CMD_READA);
__nand_addr(0);
if (pagesize == 2048)
__nand_addr(0);
rowaddr = cur_page;
for (j = 0; j < row; j++) {
__nand_addr(rowaddr & 0xff);
rowaddr >>= 8;
}
if (pagesize == 2048)
__nand_cmd(CMD_CONFIRM);
__nand_sync();
tmpbuf = (u8 *)((u32)buf + cnt * ( pagesize+oobsize));
for (j = 0; j < ecccnt ; j++) {
volatile u8 *paraddr = (volatile u8 *)EMC_NFPAR0;
u32 stat;
/* Read data */
REG_EMC_NFINTS = 0x0;
__nand_ecc_rs_decoding();
read_proc(tmpbuf, ECC_BLOCK);
/* Set PAR values */
for (k = 0; k < PAR_SIZE; k++) {
*paraddr++ = oob_buf[oob_pos->eccpos[j*PAR_SIZE + k]];
}
/* Set PRDY */
REG_EMC_NFECR |= EMC_NFECR_PRDY;
/* Wait for completion */
__nand_ecc_decode_sync();
__nand_ecc_disable();
/* Check decoding */
stat = REG_EMC_NFINTS;
if (stat & EMC_NFINTS_ERR) {
// printf("Error occured!\n");
if (stat & EMC_NFINTS_UNCOR) {
int t;
for (t = 0; t < oob_pos->eccbytes; t++)
if (oob_buf[oob_pos->eccpos[t]] != 0xff) break;
if (t < oob_pos->eccbytes-1) {
// printf("Uncorrectable error occurred\n");
}
}
else {
u32 errcnt = (stat & EMC_NFINTS_ERRCNT_MASK) >> EMC_NFINTS_ERRCNT_BIT;
switch (errcnt) {
case 4:
rs_correct(tmpbuf, (REG_EMC_NFERR3 & EMC_NFERR_INDEX_MASK) >> EMC_NFERR_INDEX_BIT, (REG_EMC_NFERR3 & EMC_NFERR_MASK_MASK) >> EMC_NFERR_MASK_BIT);
case 3:
rs_correct(tmpbuf, (REG_EMC_NFERR2 & EMC_NFERR_INDEX_MASK) >> EMC_NFERR_INDEX_BIT, (REG_EMC_NFERR2 & EMC_NFERR_MASK_MASK) >> EMC_NFERR_MASK_BIT);
case 2:
rs_correct(tmpbuf, (REG_EMC_NFERR1 & EMC_NFERR_INDEX_MASK) >> EMC_NFERR_INDEX_BIT, (REG_EMC_NFERR1 & EMC_NFERR_MASK_MASK) >> EMC_NFERR_MASK_BIT);
case 1:
rs_correct(tmpbuf, (REG_EMC_NFERR0 & EMC_NFERR_INDEX_MASK) >> EMC_NFERR_INDEX_BIT, (REG_EMC_NFERR0 & EMC_NFERR_MASK_MASK) >> EMC_NFERR_MASK_BIT);
break;
default:
break;
}
}
}
/* increment pointer */
tmpbuf += ECC_BLOCK ;
}
for (j = 0; j < oobsize; j++)
tmpbuf[j] = oob_buf[j];
cur_page++;
cnt++;
}
return 0;
}
int nand_program_4740(u8 *context, int spage, int pages)
{
u32 i, j, cur, rowaddr;
u8 *tmpbuf;
tmpbuf = (u8 *)context;
i = 0;
cur = spage;
while (i < pages) {
for (j=0;j<np->os;j++)
{
if (tmpbuf[j+np->ps]!=0xff)
break;
}
if (j==np->os)
{
tmpbuf += np->ps+np->os;
i ++;
cur ++;
continue;
}
if (pagesize != 2048)
__nand_cmd(CMD_READA);
__nand_cmd(CMD_SEQIN);
__nand_addr(0);
if (pagesize == 2048)
__nand_addr(0);
rowaddr = cur;
for (j = 0; j < row; j++) {
__nand_addr(rowaddr & 0xff);
rowaddr >>= 8;
}
write_proc(tmpbuf, np->ps+np->os);
tmpbuf += np->ps+np->os;
/* send program confirm command */
__nand_cmd(CMD_PGPROG);
__nand_sync();
__nand_cmd(CMD_READ_STATUS);
// __nand_sync();
if (__nand_data8() & 0x01) { /* page program error */
return -1;
} else ;
i ++;
cur ++;
}
return 0;
}
static int nand_data_write8(unsigned char *buf, int count)
{
int i;
u8 *p = (u8 *)buf;
for (i=0;i<count;i++)
__nand_data8() = *p++;
return 0;
}
static int nand_data_write16(unsigned char *buf, int count)
{
int i;
u16 *p = (u16 *)buf;
for (i=0;i<count/2;i++)
__nand_data16() = *p++;
return 0;
}
static int nand_data_read8(unsigned char *buf, int count)
{
int i;
u8 *p = (u8 *)buf;
for (i=0;i<count;i++)
*p++ = __nand_data8();
return 0;
}
static int nand_data_read16(unsigned char *buf, int count)
{
int i;
u16 *p = (u16 *)buf;
for (i=0;i<count/2;i++)
*p++ = __nand_data16();
return 0;
}
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