/*
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| ECC MAIN | BAD | RES | YAFFS_TAG |
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| 4 | 4 | 8 | 48 |
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*/
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#include "k9f2g08_s3c.h"
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/* From yaffs_guts.h */
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#define YAFFS_OK 1
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#define YAFFS_FAIL 0
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int k9f2g08_init(void)
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{
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return YAFFS_OK;
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}
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int k9f2g08_deinit(void)
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{
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return YAFFS_OK;
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}
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static unsigned char wait_busy_status(void)
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{
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unsigned char rc;
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for (rc=0; rc <40; rc++);
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bsp_nand_set_cs(0);
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bsp_nand_write_cmd(0x70); // read status
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do {
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rc = bsp_nand_read_data8();
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} while ((rc & (1<<6)) == 0);
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bsp_nand_set_cs(1);
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return rc;
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}
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int k9f2g08_mark_block_bad(unsigned int blk_num)
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{
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int row_addr = blk_num * 64;
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int col_addr = 2048;
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unsigned char status;
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bsp_nand_set_cs(0);
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bsp_nand_write_cmd(0x80); // write command
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bsp_nand_write_addr((unsigned char)(col_addr >> 0));
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bsp_nand_write_addr((unsigned char)(col_addr >> 8));
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bsp_nand_write_addr((unsigned char)(row_addr >> 0));
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bsp_nand_write_addr((unsigned char)(row_addr >> 8));
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bsp_nand_write_addr((unsigned char)(row_addr >> 16));
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bsp_nand_write_data32(0xFFFFFFFF);
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bsp_nand_write_data32(0x00000000);
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bsp_nand_write_data32(0xFFFFFFFF);
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bsp_nand_write_data32(0xFFFFFFFF);
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bsp_nand_write_cmd(0x10);
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bsp_nand_set_cs(1);
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status = wait_busy_status();
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return (status & (1<<0)) ? YAFFS_FAIL : YAFFS_OK;
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}
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int k9f2g08_write(unsigned int chunk, const unsigned char *dat, const unsigned char *spare, unsigned int spare_size)
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{
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int i;
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int col_addr;
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unsigned char status;
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if (dat) {
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col_addr = 0;
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} else {
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col_addr = 2048;
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}
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bsp_nand_set_cs(0);
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bsp_nand_write_cmd(0x80); // write command
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bsp_nand_write_addr((unsigned char)(col_addr >> 0));
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bsp_nand_write_addr((unsigned char)(col_addr >> 8));
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bsp_nand_write_addr((unsigned char)(chunk >> 0));
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bsp_nand_write_addr((unsigned char)(chunk >> 8));
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bsp_nand_write_addr((unsigned char)(chunk >> 16));
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bsp_nand_start_main_ecc();
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if (dat) {
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for (i=0; i<2048; i++)
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bsp_nand_write_data8(*dat++);
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}
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bsp_nand_stop_main_ecc();
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bsp_nand_write_data32(bsp_nand_read_spare_ecc0());
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bsp_nand_write_data32(0xFFFFFFFF);
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bsp_nand_write_data32(0xFFFFFFFF);
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bsp_nand_write_data32(0xFFFFFFFF);
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if (spare) {
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for (i=0; i<spare_size; i++)
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bsp_nand_write_data8(*spare++);
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}
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bsp_nand_write_cmd(0x10);
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bsp_nand_set_cs(1);
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status = wait_busy_status();
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return (status & (1<<0)) ? YAFFS_FAIL : YAFFS_OK;
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}
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int k9f2g08_read(unsigned int chunk, unsigned char *dat, unsigned char *spare, unsigned int spare_size, int *eccStatus)
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{
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int i;
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int col_addr;
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unsigned char *p = dat;
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unsigned int ecc = 0;
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int err_bit;
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int err_byte;
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if (dat) {
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col_addr = 0;
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} else {
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col_addr = 2048 + 16;
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}
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bsp_nand_set_cs(0);
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bsp_nand_write_cmd(0x00); // read command
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bsp_nand_write_addr((unsigned char)(col_addr >> 0));
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bsp_nand_write_addr((unsigned char)(col_addr >> 8));
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bsp_nand_write_addr((unsigned char)(chunk >> 0));
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bsp_nand_write_addr((unsigned char)(chunk >> 8));
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bsp_nand_write_addr((unsigned char)(chunk >> 16));
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bsp_nand_write_cmd(0x30); // read
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bsp_nand_wait_busy();
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if (dat) {
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bsp_nand_start_main_ecc();
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for (i=0; i<2048; i++)
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*p++ = bsp_nand_read_data8();
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bsp_nand_stop_main_ecc();
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ecc = bsp_nand_read_data32();
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bsp_nand_read_data32();
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bsp_nand_read_data32();
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bsp_nand_read_data32();
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}
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if (spare) {
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p = spare;
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for (i=0; i<spare_size; i++)
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*p++ = bsp_nand_read_data8();
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}
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bsp_nand_set_cs(1);
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if (dat) {
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i = bsp_nand_main_check_ecc(ecc, &err_byte, &err_bit);
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if (i == 0) {
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*eccStatus = 0;
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return 0;
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}
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if (i < 0) {
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*eccStatus = -1;
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return 0;
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}
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*eccStatus = 1;
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dat[err_byte] ^= (1<<err_bit);
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}
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return YAFFS_OK;
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}
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int k9f2g08_erase_block(unsigned int blk_num)
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{
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unsigned char status;
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int chunk = blk_num * 64;
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bsp_nand_set_cs(0);
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bsp_nand_write_cmd(0x60); // erase command
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bsp_nand_write_addr((unsigned char)(chunk >> 0));
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bsp_nand_write_addr((unsigned char)(chunk >> 8));
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bsp_nand_write_addr((unsigned char)(chunk >> 16));
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bsp_nand_write_cmd(0xD0); // erase
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bsp_nand_set_cs(1);
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status = wait_busy_status();
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return (status & (1<<0)) ? YAFFS_FAIL : YAFFS_OK;
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}
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int k9f2g08_is_block_ok(unsigned int blk_num)
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{
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int chunk = blk_num * 64;
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int col_addr = 2048 + 4;
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bsp_nand_set_cs(0);
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bsp_nand_write_cmd(0x00); // read command
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bsp_nand_write_addr((unsigned char)(col_addr >> 0));
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bsp_nand_write_addr((unsigned char)(col_addr >> 8));
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bsp_nand_write_addr((unsigned char)(chunk >> 0));
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bsp_nand_write_addr((unsigned char)(chunk >> 8));
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bsp_nand_write_addr((unsigned char)(chunk >> 16));
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bsp_nand_write_cmd(0x30); // read
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bsp_nand_wait_busy();
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int tmp = bsp_nand_read_data32();
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bsp_nand_set_cs(1);
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if (tmp == 0xFFFFFFFF) {
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return 1;
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}
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return 0;
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}
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int k9f2g08_read_id(unsigned int *id)
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{
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int rc = -1;
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bsp_nand_set_cs(0);
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bsp_nand_write_cmd(0x90); // read command
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bsp_nand_write_addr((unsigned char)0);
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do {
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if ((rc = bsp_nand_read_data8()) != 0xEC)
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break;
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*id = bsp_nand_read_data32();
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rc = 0;
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} while(0);
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bsp_nand_set_cs(1);
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return rc;
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}
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int k9f2g08_read_ll(unsigned int chunk, unsigned char *dat, unsigned char *spare)
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{
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int i;
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int col_addr;
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unsigned char *p;
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if (dat) {
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col_addr = 0;
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} else {
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col_addr = 2048;
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}
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bsp_nand_set_cs(0);
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bsp_nand_write_cmd(0x00); // read command
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bsp_nand_write_addr((unsigned char)(col_addr >> 0));
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bsp_nand_write_addr((unsigned char)(col_addr >> 8));
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bsp_nand_write_addr((unsigned char)(chunk >> 0));
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bsp_nand_write_addr((unsigned char)(chunk >> 8));
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bsp_nand_write_addr((unsigned char)(chunk >> 16));
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bsp_nand_write_cmd(0x30); // read
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bsp_nand_wait_busy();
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if (dat) {
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p = dat;
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for (i=0; i<2048; i++)
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*p++ = bsp_nand_read_data8();
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}
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if (spare) {
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p = spare;
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for (i=0; i<64; i++)
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*p++ = bsp_nand_read_data8();
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}
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bsp_nand_set_cs(1);
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return 1;
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}
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