forked from Imagelibrary/rtems
149 lines
4.1 KiB
C
149 lines
4.1 KiB
C
/* SPDX-License-Identifier: BSD-2-Clause */
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/**
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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 embedded brains GmbH & Co. KG
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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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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