common/cmd_disk.c

/*
 * (C) Copyright 2000-2011
 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 *
 */
#include <common.h>
#include <command.h>
#include <part.h>

#if defined(CONFIG_CMD_IDE) || defined(CONFIG_CMD_SCSI) || \
	defined(CONFIG_USB_STORAGE)
int common_diskboot(cmd_tbl_t *cmdtp, const char *intf, int argc,
		    char *const argv[])
{
	int dev, part;
	ulong addr = CONFIG_SYS_LOAD_ADDR;
	ulong cnt;
	disk_partition_t info;
	image_header_t *hdr;
	block_dev_desc_t *dev_desc;

#if defined(CONFIG_FIT)
	const void *fit_hdr = NULL;
#endif

	bootstage_mark(BOOTSTAGE_ID_IDE_START);
	if (argc > 3) {
		bootstage_error(BOOTSTAGE_ID_IDE_ADDR);
		return CMD_RET_USAGE;
	}
	bootstage_mark(BOOTSTAGE_ID_IDE_ADDR);

	if (argc > 1)
		addr = simple_strtoul(argv[1], NULL, 16);

	bootstage_mark(BOOTSTAGE_ID_IDE_BOOT_DEVICE);

	part = get_device_and_partition(intf, (argc == 3) ? argv[2] : NULL,
					&dev_desc, &info, 1);
	if (part < 0) {
		bootstage_error(BOOTSTAGE_ID_IDE_TYPE);
		return 1;
	}

	dev = dev_desc->dev;
	bootstage_mark(BOOTSTAGE_ID_IDE_TYPE);

	printf("\nLoading from %s device %d, partition %d: "
	       "Name: %.32s  Type: %.32s\n", intf, dev, part, info.name,
	       info.type);

	debug("First Block: %ld,  # of blocks: %ld, Block Size: %ld\n",
	      info.start, info.size, info.blksz);

	if (dev_desc->block_read(dev, info.start, 1, (ulong *) addr) != 1) {
		printf("** Read error on %d:%d\n", dev, part);
		bootstage_error(BOOTSTAGE_ID_IDE_PART_READ);
		return 1;
	}
	bootstage_mark(BOOTSTAGE_ID_IDE_PART_READ);

	switch (genimg_get_format((void *) addr)) {
	case IMAGE_FORMAT_LEGACY:
		hdr = (image_header_t *) addr;

		bootstage_mark(BOOTSTAGE_ID_IDE_FORMAT);

		if (!image_check_hcrc(hdr)) {
			puts("\n** Bad Header Checksum **\n");
			bootstage_error(BOOTSTAGE_ID_IDE_CHECKSUM);
			return 1;
		}
		bootstage_mark(BOOTSTAGE_ID_IDE_CHECKSUM);

		image_print_contents(hdr);

		cnt = image_get_image_size(hdr);
		break;
#if defined(CONFIG_FIT)
	case IMAGE_FORMAT_FIT:
		fit_hdr = (const void *) addr;
		puts("Fit image detected...\n");

		cnt = fit_get_size(fit_hdr);
		break;
#endif
	default:
		bootstage_error(BOOTSTAGE_ID_IDE_FORMAT);
		puts("** Unknown image type\n");
		return 1;
	}

	cnt += info.blksz - 1;
	cnt /= info.blksz;
	cnt -= 1;

	if (dev_desc->block_read(dev, info.start + 1, cnt,
					 (ulong *)(addr + info.blksz)) != cnt) {
		printf("** Read error on %d:%d\n", dev, part);
		bootstage_error(BOOTSTAGE_ID_IDE_READ);
		return 1;
	}
	bootstage_mark(BOOTSTAGE_ID_IDE_READ);

#if defined(CONFIG_FIT)
	/* This cannot be done earlier,
	 * we need complete FIT image in RAM first */
	if (genimg_get_format((void *) addr) == IMAGE_FORMAT_FIT) {
		if (!fit_check_format(fit_hdr)) {
			bootstage_error(BOOTSTAGE_ID_IDE_FIT_READ);
			puts("** Bad FIT image format\n");
			return 1;
		}
		bootstage_mark(BOOTSTAGE_ID_IDE_FIT_READ_OK);
		fit_print_contents(fit_hdr);
	}
#endif

	flush_cache(addr, (cnt+1)*info.blksz);

	/* Loading ok, update default load address */
	load_addr = addr;

	return bootm_maybe_autostart(cmdtp, argv[0]);
}
#endif