forked from Imagelibrary/rtems
123 lines
2.6 KiB
C
123 lines
2.6 KiB
C
/**
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* @file
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*
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* @ingroup lpc32xx_nand_mlc
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*
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* @brief lpc32xx_mlc_erase_block_safe(), lpc32xx_mlc_erase_block_safe_3(), and
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* lpc32xx_mlc_zero_block() implementation.
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*/
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/*
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* Copyright (c) 2011 embedded brains GmbH. All rights reserved.
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*
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* embedded brains GmbH
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* Obere Lagerstr. 30
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* 82178 Puchheim
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* Germany
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* <rtems@embedded-brains.de>
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.rtems.org/license/LICENSE.
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*/
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#include <bsp/nand-mlc.h>
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#include <string.h>
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#include <bsp.h>
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void lpc32xx_mlc_zero_pages(uint32_t page_begin, uint32_t page_end)
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{
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uint32_t page = 0;
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for (page = page_begin; page < page_end; ++page) {
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lpc32xx_mlc_write_page_with_ecc(
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page,
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lpc32xx_magic_zero_begin,
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lpc32xx_magic_zero_begin
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);
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}
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}
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static rtems_status_code is_valid_page(
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uint32_t page_begin,
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uint32_t page_offset
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)
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{
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rtems_status_code sc = RTEMS_SUCCESSFUL;
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uint32_t spare [MLC_LARGE_SPARE_WORD_COUNT];
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memset(spare, 0, MLC_LARGE_SPARE_SIZE);
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sc = lpc32xx_mlc_read_page(
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page_begin + page_offset,
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lpc32xx_magic_zero_begin,
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spare,
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NULL
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);
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if (sc == RTEMS_SUCCESSFUL) {
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if (lpc32xx_mlc_is_bad_page(spare)) {
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sc = RTEMS_INCORRECT_STATE;
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}
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}
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return sc;
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}
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static rtems_status_code is_valid_block(uint32_t page_begin)
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{
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rtems_status_code sc = RTEMS_SUCCESSFUL;
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if (lpc32xx_mlc_page_size() == 512 && lpc32xx_mlc_io_width() == 8) {
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sc = is_valid_page(page_begin, 0);
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if (sc == RTEMS_SUCCESSFUL) {
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sc = is_valid_page(page_begin, 1);
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}
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} else {
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sc = RTEMS_NOT_IMPLEMENTED;
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}
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return sc;
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}
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rtems_status_code lpc32xx_mlc_is_valid_block(uint32_t block_index)
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{
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uint32_t pages_per_block = lpc32xx_mlc_pages_per_block();
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uint32_t page_begin = block_index * pages_per_block;
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return is_valid_block(page_begin);
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}
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rtems_status_code lpc32xx_mlc_erase_block_safe_3(
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uint32_t block_index,
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uint32_t page_begin,
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uint32_t page_end
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)
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{
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rtems_status_code sc = RTEMS_SUCCESSFUL;
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sc = is_valid_block(page_begin);
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if (sc == RTEMS_SUCCESSFUL) {
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sc = lpc32xx_mlc_erase_block(block_index);
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if (sc == RTEMS_UNSATISFIED) {
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lpc32xx_mlc_zero_pages(page_begin, page_end);
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}
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}
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return sc;
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}
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rtems_status_code lpc32xx_mlc_erase_block_safe(uint32_t block_index)
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{
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uint32_t pages_per_block = lpc32xx_mlc_pages_per_block();
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uint32_t page_begin = block_index * pages_per_block;
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uint32_t page_end = page_begin + pages_per_block;
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return lpc32xx_mlc_erase_block_safe_3(
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block_index,
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page_begin,
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page_end
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);
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}
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