89 lines
1.9 KiB
C
89 lines
1.9 KiB
C
/*
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* am33xx_bbu_spi_mlo.c - am35xx and am33xx specific MLO
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* update handler for SPI NOR flash
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*
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* Copyright (c) 2013 Sharavn kumar <shravan.k@phytec.in>, Phytec
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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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/*
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* AM35xx, AM33xx chips use big endian MLO for SPI NOR flash
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* This handler converting MLO to big endian and write to SPI NOR
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*/
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static int spi_nor_mlo_handler(struct bbu_handler *handler,
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struct bbu_data *data)
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{
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int dstfd = 0;
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int ret = 0;
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uint32_t readbuf;
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int size = data->len;
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void *image = data->image;
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dstfd = open(data->devicefile, O_WRONLY);
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if (dstfd < 0) {
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printf("could not open %s: %s", data->devicefile, errno_str());
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ret = dstfd;
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goto out;
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}
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ret = erase(dstfd, ~0, 0);
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if (ret < 0) {
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printf("could not erase %s: %s", data->devicefile, errno_str());
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goto out1;
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}
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for (; size >= 0; size -= 4) {
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memcpy((char *)&readbuf, image, 4);
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readbuf = cpu_to_be32(readbuf);
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ret = write(dstfd, &readbuf, 4);
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if (ret < 0) {
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perror("write");
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goto out1;
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}
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image = image + 4;
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}
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ret = 0;
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out1:
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close(dstfd);
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out:
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return ret;
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}
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/*
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* Register a am33xx MLO update handler for SPI NOR
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*/
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int am33xx_bbu_spi_nor_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 = spi_nor_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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