forked from Imagelibrary/rtems
135 lines
3.0 KiB
C
135 lines
3.0 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_read_blocks() implementation.
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*/
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/*
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* Copyright (c) 2010
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* embedded brains GmbH
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* Obere Lagerstr. 30
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* D-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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static rtems_status_code read_page(
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uint32_t first_page_of_block,
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uint32_t page,
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uint32_t page_data [MLC_LARGE_DATA_WORD_COUNT],
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uint32_t page_spare [MLC_LARGE_SPARE_WORD_COUNT]
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)
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{
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rtems_status_code sc = RTEMS_SUCCESSFUL;
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uint32_t page_index = first_page_of_block + page;
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bool possible_bad_page = page == 0 || page == 1;
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if (possible_bad_page) {
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memset(page_spare, 0, MLC_LARGE_SPARE_SIZE);
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}
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sc = lpc32xx_mlc_read_page(page_index, page_data, page_spare, NULL);
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if (possible_bad_page && lpc32xx_mlc_is_bad_page(page_spare)) {
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return RTEMS_UNSATISFIED;
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} else if (sc == RTEMS_SUCCESSFUL) {
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return RTEMS_SUCCESSFUL;
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} else {
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return sc;
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}
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}
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rtems_status_code lpc32xx_mlc_read_blocks(
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uint32_t block_begin,
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uint32_t block_end,
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lpc32xx_mlc_read_process process,
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void *process_arg,
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uint32_t page_buffer_0 [MLC_LARGE_DATA_WORD_COUNT],
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uint32_t page_buffer_1 [MLC_LARGE_DATA_WORD_COUNT]
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)
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{
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rtems_status_code sc = RTEMS_SUCCESSFUL;
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uint32_t page_spare_0 [MLC_LARGE_SPARE_WORD_COUNT];
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uint32_t page_spare_1 [MLC_LARGE_SPARE_WORD_COUNT];
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uint32_t pages_per_block = lpc32xx_mlc_pages_per_block();
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uint32_t page_size = lpc32xx_mlc_page_size();
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uint32_t block = 0;
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uint32_t first_page_of_block = block_begin * pages_per_block;
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for (
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block = block_begin;
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block != block_end;
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++block, first_page_of_block += pages_per_block
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) {
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uint32_t page = 0;
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bool done = false;
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sc = read_page(first_page_of_block, 0, page_buffer_0, page_spare_0);
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if (sc == RTEMS_UNSATISFIED) {
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continue;
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} else if (sc != RTEMS_SUCCESSFUL) {
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goto done;
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}
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sc = read_page(first_page_of_block, 1, page_buffer_1, page_spare_1);
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if (sc == RTEMS_UNSATISFIED) {
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continue;
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} else if (sc != RTEMS_SUCCESSFUL) {
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goto done;
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}
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done = (*process)(
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process_arg,
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first_page_of_block + 0,
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page_size,
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page_buffer_0,
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page_spare_0
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);
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if (done) {
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goto done;
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}
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done = (*process)(
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process_arg,
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first_page_of_block + 1,
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page_size,
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page_buffer_1,
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page_spare_1
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);
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if (done) {
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goto done;
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}
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for (page = 2; page < pages_per_block; ++page) {
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sc = read_page(first_page_of_block, page, page_buffer_1, page_spare_1);
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if (sc != RTEMS_SUCCESSFUL) {
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goto done;
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}
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done = (*process)(
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process_arg,
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first_page_of_block + page,
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page_size,
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page_buffer_1,
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page_spare_1
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);
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if (done) {
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goto done;
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}
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}
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}
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done:
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return sc;
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}
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