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b890446e3d
A very simple implementation, as we are very short on remaining block RAM. Simply blindly copies the entire userdata area to the SD card. This may subject the SD card to some extra wear, as well as potentially read-disturb some Flash memory pages, but this would require more code.
103 lines
2.9 KiB
C
103 lines
2.9 KiB
C
//
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// Copyright (C) 2015-2016 Markus Hiienkari <mhiienka@niksula.hut.fi>
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//
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// This file is part of Open Source Scan Converter project.
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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//
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#include <io.h>
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#include <string.h>
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#include "sdcard.h"
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#include "flash.h"
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#include "lcd.h"
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extern alt_flash_dev *epcq_dev;
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SD_DEV sdcard_dev;
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int check_sdcard(alt_u8 *databuf)
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{
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SDRESULTS res;
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res = SD_Init(&sdcard_dev);
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printf("SD det status: %u\n", res);
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if (res == SD_OK)
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res = SD_Read(&sdcard_dev, databuf, 0, 0, 512);
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return -res;
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}
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int copy_sd_to_flash(alt_u32 sd_blknum, alt_u32 flash_pagenum, alt_u32 length, alt_u8 *tmpbuf)
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{
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SDRESULTS res;
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int retval;
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alt_u32 bytes_to_rw;
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while (length > 0) {
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bytes_to_rw = (length < SD_BLK_SIZE) ? length : SD_BLK_SIZE;
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res = SD_Read(&sdcard_dev, tmpbuf, sd_blknum, 0, bytes_to_rw);
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if (res != SD_OK) {
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printf("Failed to read SD card\n");
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return -res;
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}
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if ((flash_pagenum % PAGES_PER_SECTOR) == 0) {
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retval = alt_epcq_controller_erase_block(epcq_dev, flash_pagenum*PAGESIZE);
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if (retval != 0)
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return retval;
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}
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retval = alt_epcq_controller_write_block(epcq_dev, ((flash_pagenum/PAGES_PER_SECTOR)*SECTORSIZE), flash_pagenum*PAGESIZE, tmpbuf, bytes_to_rw);
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if (retval != 0)
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return retval;
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++sd_blknum;
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flash_pagenum += bytes_to_rw/PAGESIZE;
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length -= bytes_to_rw;
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}
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return 0;
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}
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int copy_flash_to_sd(alt_u32 flash_pagenum, alt_u32 sd_blknum, alt_u32 length, alt_u8 *tmpbuf)
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{
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SDRESULTS res;
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int retval;
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alt_u32 bytes_to_rw;
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while (length > 0) {
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bytes_to_rw = (length < SD_BLK_SIZE) ? length : SD_BLK_SIZE;
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retval = alt_epcq_controller_read(epcq_dev, flash_pagenum*PAGESIZE, tmpbuf, bytes_to_rw);
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if (retval != 0)
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return retval;
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if (bytes_to_rw < SD_BLK_SIZE)
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memset(tmpbuf+bytes_to_rw, 0, SD_BLK_SIZE-bytes_to_rw);
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res = SD_Write(&sdcard_dev, tmpbuf, sd_blknum);
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if (res != SD_OK) {
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printf("Failed to write to SD card\n");
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return -res;
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}
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++sd_blknum;
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flash_pagenum += bytes_to_rw/PAGESIZE;
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length -= bytes_to_rw;
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}
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return 0;
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}
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