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/* Copyright (c) 2013 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*
* Utility for ChromeOS-specific GPT partitions, Please see corresponding .c
* files for more details.
*/
#include "flash_ts.h"
#include "cgpt.h"
#include "errno.h"
#include "stdio.h"
#include "string.h"
inline int page_to_sector(const nand_geom *nand, int page) {
return page * (nand->szofpg / nand->szofsector);
}
int nand_read_page(const nand_geom *nand, int page, void *buf, int size) {
uint8_t *page_buff;
if (size > nand->szofpg) {
return -1;
}
if (Load((struct drive *)nand->user, &page_buff,
page_to_sector(nand, page), nand->szofsector,
(size + nand->szofsector - 1) / nand->szofsector)) {
// page may be not erased. return default data.
memset(buf, 0xff, size);
return 0;
}
memcpy(buf, page_buff, size);
free(page_buff);
return 0;
}
int nand_write_page(const nand_geom *nand,
int page, const void *buf, int size) {
void *page_buff;
int ret;
if (size > nand->szofpg) {
return -1;
}
page_buff = malloc(nand->szofpg);
if (!page_buff)
return -1;
memset(page_buff, 0xff, nand->szofpg);
memcpy(page_buff, buf, size < nand->szofpg ? size : nand->szofpg);
ret = Save((struct drive *)nand->user, page_buff, page_to_sector(nand, page),
nand->szofsector, nand->szofpg / nand->szofsector);
free(page_buff);
return ret;
}
int nand_erase_block(const nand_geom *nand, int block) {
int sector = block * (nand->szofblk / nand->szofsector);
int res;
void *erase_buff = malloc(nand->szofblk);
if (!erase_buff)
return -1;
memset(erase_buff, 0xff, nand->szofblk);
res = Save((struct drive *)nand->user, erase_buff, sector,
nand->szofsector, nand->szofblk / nand->szofsector);
free(erase_buff);
return res;
}
int nand_is_bad_block(const nand_geom *nand, int block) {
return 0;
}
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