158 lines
3.2 KiB
C
158 lines
3.2 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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uint32_t *header;
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int swap = 0;
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header = data->image;
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if (header[5] == 0x43485345) {
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swap = 0;
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} else if (header[5] == 0x45534843) {
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swap = 1;
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} else {
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if (!bbu_force(data, "Not a MLO image"))
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return -EINVAL;
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}
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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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if (swap)
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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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static int spi_nor_handler(struct bbu_handler *handler,
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struct bbu_data *data)
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{
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int fd, ret;
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if (file_detect_type(data->image, data->len) != filetype_arm_barebox) {
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if (!bbu_force(data, "Not an ARM barebox image"))
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return -EINVAL;
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}
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fd = open(data->devicefile, O_RDWR | O_CREAT);
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if (fd < 0)
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return fd;
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debug("%s: eraseing %s from 0 to 0x%08x\n", __func__,
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data->devicefile, data->len);
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ret = erase(fd, data->len, 0);
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if (ret) {
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printf("erasing %s failed with %s\n", data->devicefile,
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strerror(-ret));
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goto err_close;
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}
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ret = write(fd, data->image, data->len);
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if (ret < 0)
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goto err_close;
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ret = 0;
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err_close:
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close(fd);
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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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/*
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* Register a am33xx update handler for SPI NOR
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*/
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int am33xx_bbu_spi_nor_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_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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