b9672eb87d
With this patch the barebox_update command will be extended by the possibility to flash the MLO to eMMC devices. The MLO will be flashed to the following addresses: 0x00000 0x20000 0x40000 0x60000 Because the first 512 Bytes of the MLO are reserved for the CHSETTINGS header and this only use ~80 Bytes, there is space for the partition table in the header. The command will overwrite the bootstrap code area and will hold the partition table and the Boot signature. Signed-off-by: Daniel Schultz <d.schultz@phytec.de> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
96 lines
2.3 KiB
C
96 lines
2.3 KiB
C
/*
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* Copyright (c) 2015 Phytec Messtechnik GmbH
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* Author: Daniel Schultz <d.schultz@phytec.de>
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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 version 2
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* as published by the Free Software Foundation.
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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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#include <common.h>
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#include <malloc.h>
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#include <bbu.h>
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#include <fs.h>
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#include <fcntl.h>
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#include <filetype.h>
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#define PART_TABLE_SIZE 66
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#define PART_TABLE_OFFSET 0x1BE
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static int emmc_mlo_handler(struct bbu_handler *handler, struct bbu_data *data)
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{
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int ret = 0;
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int i = 0;
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int fd;
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const void *image = data->image;
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size_t size = data->len;
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u8 part_table[PART_TABLE_SIZE];
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if (file_detect_type(image, size) != filetype_ch_image) {
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pr_err("%s is not a valid ch-image\n", data->imagefile);
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return -EINVAL;
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}
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ret = bbu_confirm(data);
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if (ret != 0)
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return ret;
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fd = open(handler->devicefile, O_WRONLY);
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if (fd < 0) {
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pr_err("could not open %s: %s\n", handler->devicefile,
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errno_str());
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return fd;
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}
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/* save the partition table */
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ret = pread(fd, part_table, PART_TABLE_SIZE, PART_TABLE_OFFSET);
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if (ret < 0) {
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pr_err("could not read partition table from fd %s: %s\n",
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handler->devicefile, errno_str());
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goto error;
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}
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/* write the MLOs */
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for (i = 0; i < 4; i++) {
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ret = pwrite(fd, image, size, i * 0x20000);
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if (ret < 0) {
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pr_err("could not write MLO %i/4 to fd %s: %s\n",
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i + 1, handler->devicefile, errno_str());
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goto error_save_part_table;
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}
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}
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error_save_part_table:
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/* write the partition table back */
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ret = pwrite(fd, part_table, PART_TABLE_SIZE, PART_TABLE_OFFSET);
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if (ret < 0)
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pr_err("could not write partition table to fd %s: %s\n",
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handler->devicefile, errno_str());
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error:
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close(fd);
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return ret;
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}
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int am33xx_bbu_emmc_mlo_register_handler(const char *name, char *devicefile)
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{
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struct bbu_handler *handler;
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int ret;
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handler = xzalloc(sizeof(*handler));
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handler->devicefile = devicefile;
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handler->name = name;
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handler->handler = emmc_mlo_handler;
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ret = bbu_register_handler(handler);
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if (ret)
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free(handler);
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return ret;
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}
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