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/**
* @file
*
* @ingroup lpc32xx_nand_mlc
*
* @brief lpc32xx_mlc_erase_block_safe(), lpc32xx_mlc_erase_block_safe_3(), and
* lpc32xx_mlc_zero_block() implementation.
*/
/*
* Copyright (c) 2011 embedded brains GmbH. All rights reserved.
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.org/license/LICENSE.
*/
#include <bsp/nand-mlc.h>
#include <string.h>
#include <bsp.h>
void lpc32xx_mlc_zero_pages(uint32_t page_begin, uint32_t page_end)
{
uint32_t page = 0;
for (page = page_begin; page < page_end; ++page) {
lpc32xx_mlc_write_page_with_ecc(
page,
lpc32xx_magic_zero_begin,
lpc32xx_magic_zero_begin
);
}
}
static rtems_status_code is_valid_page(
uint32_t page_begin,
uint32_t page_offset
)
{
rtems_status_code sc = RTEMS_SUCCESSFUL;
uint32_t spare [MLC_LARGE_SPARE_WORD_COUNT];
memset(spare, 0, MLC_LARGE_SPARE_SIZE);
sc = lpc32xx_mlc_read_page(
page_begin + page_offset,
lpc32xx_magic_zero_begin,
spare,
NULL
);
if (sc == RTEMS_SUCCESSFUL) {
if (lpc32xx_mlc_is_bad_page(spare)) {
sc = RTEMS_INCORRECT_STATE;
}
}
return sc;
}
static rtems_status_code is_valid_block(uint32_t page_begin)
{
rtems_status_code sc = RTEMS_SUCCESSFUL;
if (lpc32xx_mlc_page_size() == 512 && lpc32xx_mlc_io_width() == 8) {
sc = is_valid_page(page_begin, 0);
if (sc == RTEMS_SUCCESSFUL) {
sc = is_valid_page(page_begin, 1);
}
} else {
sc = RTEMS_NOT_IMPLEMENTED;
}
return sc;
}
rtems_status_code lpc32xx_mlc_is_valid_block(uint32_t block_index)
{
uint32_t pages_per_block = lpc32xx_mlc_pages_per_block();
uint32_t page_begin = block_index * pages_per_block;
return is_valid_block(page_begin);
}
rtems_status_code lpc32xx_mlc_erase_block_safe_3(
uint32_t block_index,
uint32_t page_begin,
uint32_t page_end
)
{
rtems_status_code sc = RTEMS_SUCCESSFUL;
sc = is_valid_block(page_begin);
if (sc == RTEMS_SUCCESSFUL) {
sc = lpc32xx_mlc_erase_block(block_index);
if (sc == RTEMS_UNSATISFIED) {
lpc32xx_mlc_zero_pages(page_begin, page_end);
}
}
return sc;
}
rtems_status_code lpc32xx_mlc_erase_block_safe(uint32_t block_index)
{
uint32_t pages_per_block = lpc32xx_mlc_pages_per_block();
uint32_t page_begin = block_index * pages_per_block;
uint32_t page_end = page_begin + pages_per_block;
return lpc32xx_mlc_erase_block_safe_3(
block_index,
page_begin,
page_end
);
}
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