auto_update.c

嵌入式试验箱S3C2410的bootloader源代码

/*
 * (C) Copyright 2003
 * Gary Jennejohn, DENX Software Engineering, [e-mail].
 *
 * 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 <malloc.h>
#include <image.h>
#include <asm/byteorder.h>
#include <usb.h>

#ifdef CFG_HUSH_PARSER
#include <hush.h>
#endif

#ifdef CONFIG_AUTO_UPDATE

#ifndef CONFIG_USB_OHCI
#error "must define CONFIG_USB_OHCI"
#endif

#ifndef CONFIG_USB_STORAGE
#error "must define CONFIG_USB_STORAGE"
#endif

#ifndef CFG_HUSH_PARSER
#error "must define CFG_HUSH_PARSER"
#endif

#if !(CONFIG_COMMANDS & CFG_CMD_FAT)
#error "must define CFG_CMD_FAT"
#endif

/*
 * Check whether a USB memory stick is plugged in.
 * If one is found:
 *	1) if prepare.img ist found load it into memory. If it is
 *		valid then run it.
 *	2) if preinst.img is found load it into memory. If it is
 *		valid then run it. Update the EEPROM.
 *	3) if firmw_01.img is found load it into memory. If it is valid,
 *		burn it into FLASH and update the EEPROM.
 *	4) if kernl_01.img is found load it into memory. If it is valid,
 *		burn it into FLASH and update the EEPROM.
 *	5) if app.img is found load it into memory. If it is valid,
 *		burn it into FLASH and update the EEPROM.
 *	6) if disk.img is found load it into memory. If it is valid,
 *		burn it into FLASH and update the EEPROM.
 *	7) if postinst.img is found load it into memory. If it is
 *		valid then run it. Update the EEPROM.
 */

#undef AU_DEBUG

#undef debug
#ifdef	AU_DEBUG
#define debug(fmt,args...)	printf (fmt ,##args)
#else
#define debug(fmt,args...)
#endif	/* AU_DEBUG */

/* possible names of files on the USB stick. */
#define AU_PREPARE	"prepare.img"
#define AU_PREINST	"preinst.img"
#define AU_FIRMWARE	"firmw_01.img"
#define AU_KERNEL	"kernl_01.img"
#define AU_APP		"app.img"
#define AU_DISK		"disk.img"
#define AU_POSTINST	"postinst.img"

struct flash_layout
{
	long start;
	long end;
};

/* layout of the FLASH. ST = start address, ND = end address. */
#ifndef CONFIG_FLASH_8MB			/* 16 MB Flash, 32 MB RAM */
#define AU_FL_FIRMWARE_ST	0x00000000
#define AU_FL_FIRMWARE_ND	0x0009FFFF
#define AU_FL_VFD_ST		0x000A0000
#define AU_FL_VFD_ND		0x000BFFFF
#define AU_FL_KERNEL_ST		0x000C0000
#define AU_FL_KERNEL_ND		0x001BFFFF
#define AU_FL_APP_ST		0x001C0000
#define AU_FL_APP_ND		0x005BFFFF
#define AU_FL_DISK_ST		0x005C0000
#define AU_FL_DISK_ND		0x00FFFFFF
#else						/*  8 MB Flash, 32 MB RAM */
#define AU_FL_FIRMWARE_ST	0x00000000
#define AU_FL_FIRMWARE_ND	0x0005FFFF
#define AU_FL_KERNEL_ST		0x00060000
#define AU_FL_KERNEL_ND		0x0013FFFF
#define AU_FL_APP_ST		0x00140000
#define AU_FL_APP_ND		0x0067FFFF
#define AU_FL_DISK_ST		0x00680000
#define AU_FL_DISK_ND		0x007DFFFF
#define AU_FL_VFD_ST		0x007E0000
#define AU_FL_VFD_ND		0x007FFFFF
#endif	/* CONFIG_FLASH_8MB */

/* a structure with the offsets to values in the EEPROM */
struct eeprom_layout
{
	int time;
	int size;
	int dcrc;
};

/* layout of the EEPROM - offset from the start. All entries are 32 bit. */
#define AU_EEPROM_TIME_PREINST	64
#define AU_EEPROM_SIZE_PREINST	68
#define AU_EEPROM_DCRC_PREINST	72
#define AU_EEPROM_TIME_FIRMWARE	76
#define AU_EEPROM_SIZE_FIRMWARE	80
#define AU_EEPROM_DCRC_FIRMWARE	84
#define AU_EEPROM_TIME_KERNEL	88
#define AU_EEPROM_SIZE_KERNEL	92
#define AU_EEPROM_DCRC_KERNEL	96
#define AU_EEPROM_TIME_APP	100
#define AU_EEPROM_SIZE_APP	104
#define AU_EEPROM_DCRC_APP	108
#define AU_EEPROM_TIME_DISK	112
#define AU_EEPROM_SIZE_DISK	116
#define AU_EEPROM_DCRC_DISK	120
#define AU_EEPROM_TIME_POSTINST 124
#define AU_EEPROM_SIZE_POSTINST 128
#define AU_EEPROM_DCRC_POSTINST 132

static int au_usb_stor_curr_dev; /* current device */

/* index of each file in the following arrays */
#define IDX_PREPARE	0
#define IDX_PREINST	1
#define IDX_FIRMWARE	2
#define IDX_KERNEL	3
#define IDX_APP		4
#define IDX_DISK	5
#define IDX_POSTINST	6
/* max. number of files which could interest us */
#define AU_MAXFILES 7
/* pointers to file names */
char *aufile[AU_MAXFILES];
/* sizes of flash areas for each file */
long ausize[AU_MAXFILES];
/* offsets into the EEEPROM */
struct eeprom_layout auee_off[AU_MAXFILES] = { \
	{0}, \
	{AU_EEPROM_TIME_PREINST, AU_EEPROM_SIZE_PREINST, AU_EEPROM_DCRC_PREINST,}, \
	{AU_EEPROM_TIME_FIRMWARE, AU_EEPROM_SIZE_FIRMWARE, AU_EEPROM_DCRC_FIRMWARE,}, \
	{AU_EEPROM_TIME_KERNEL, AU_EEPROM_SIZE_KERNEL, AU_EEPROM_DCRC_KERNEL,}, \
	{AU_EEPROM_TIME_APP, AU_EEPROM_SIZE_APP, AU_EEPROM_DCRC_APP,}, \
	{AU_EEPROM_TIME_DISK, AU_EEPROM_SIZE_DISK, AU_EEPROM_DCRC_DISK,}, \
	{AU_EEPROM_TIME_POSTINST, AU_EEPROM_SIZE_POSTINST, AU_EEPROM_DCRC_POSTINST,} \
	};
/* array of flash areas start and end addresses */
struct flash_layout aufl_layout[AU_MAXFILES - 3] = { \
	{AU_FL_FIRMWARE_ST, AU_FL_FIRMWARE_ND,}, \
	{AU_FL_KERNEL_ST, AU_FL_KERNEL_ND,}, \
	{AU_FL_APP_ST, AU_FL_APP_ND,}, \
	{AU_FL_DISK_ST, AU_FL_DISK_ND,}, \
};
/* convert the index into aufile[] to an index into aufl_layout[] */
#define FIDX_TO_LIDX(idx) ((idx) - 2)

/* where to load files into memory */
#define LOAD_ADDR ((unsigned char *)0x0C100000)
/* the app is the largest image */
#define MAX_LOADSZ ausize[IDX_APP]

/* externals */
extern int fat_register_device(block_dev_desc_t *, int);
extern int file_fat_detectfs(void);
extern long file_fat_read(const char *, void *, unsigned long);
extern int i2c_read (unsigned char, unsigned int, int , unsigned char* , int);
extern int i2c_write (uchar, uint, int , uchar* , int);
#ifdef CONFIG_VFD
extern int trab_vfd (ulong);
extern int transfer_pic(unsigned char, unsigned char *, int, int);
#endif
extern int flash_sect_erase(ulong, ulong);
extern int flash_sect_protect (int, ulong, ulong);
extern int flash_write (char *, ulong, ulong);
/* change char* to void* to shutup the compiler */
extern int i2c_write_multiple (uchar, uint, int, void *, int);
extern int i2c_read_multiple (uchar, uint, int, void *, int);
extern block_dev_desc_t *get_dev (char*, int);
extern int u_boot_hush_start(void);

int
au_check_cksum_valid(int idx, long nbytes)
{
	image_header_t *hdr;
	unsigned long checksum;

	hdr = (image_header_t *)LOAD_ADDR;

	if (nbytes != (sizeof(*hdr) + ntohl(hdr->ih_size)))
	{
		printf ("Image %s bad total SIZE\n", aufile[idx]);
		return -1;
	}
	/* check the data CRC */
	checksum = ntohl(hdr->ih_dcrc);

	if (crc32 (0, (uchar *)(LOAD_ADDR + sizeof(*hdr)), ntohl(hdr->ih_size))
		!= checksum)
	{
		printf ("Image %s bad data checksum\n", aufile[idx]);
		return -1;
	}
	return 0;
}

int
au_check_header_valid(int idx, long nbytes)
{
	image_header_t *hdr;
	unsigned long checksum;
	unsigned char buf[4];

	hdr = (image_header_t *)LOAD_ADDR;
	/* check the easy ones first */
#undef CHECK_VALID_DEBUG
#ifdef CHECK_VALID_DEBUG
	printf("magic %#x %#x ", ntohl(hdr->ih_magic), IH_MAGIC);
	printf("arch %#x %#x ", hdr->ih_arch, IH_CPU_ARM);
	printf("size %#x %#lx ", ntohl(hdr->ih_size), nbytes);
	printf("type %#x %#x ", hdr->ih_type, IH_TYPE_KERNEL);
#endif
	if (nbytes < sizeof(*hdr))
	{
		printf ("Image %s bad header SIZE\n", aufile[idx]);
		return -1;
	}
	if (ntohl(hdr->ih_magic) != IH_MAGIC || hdr->ih_arch != IH_CPU_ARM)
	{
		printf ("Image %s bad MAGIC or ARCH\n", aufile[idx]);
		return -1;
	}
	/* check the hdr CRC */
	checksum = ntohl(hdr->ih_hcrc);
	hdr->ih_hcrc = 0;

	if (crc32 (0, (uchar *)hdr, sizeof(*hdr)) != checksum) {
		printf ("Image %s bad header checksum\n", aufile[idx]);
		return -1;
	}
	hdr->ih_hcrc = htonl(checksum);
	/* check the type - could do this all in one gigantic if() */
	if ((idx == IDX_FIRMWARE) && (hdr->ih_type != IH_TYPE_FIRMWARE)) {
		printf ("Image %s wrong type\n", aufile[idx]);
		return -1;
	}
	if ((idx == IDX_KERNEL) && (hdr->ih_type != IH_TYPE_KERNEL)) {
		printf ("Image %s wrong type\n", aufile[idx]);
		return -1;
	}
	if ((idx == IDX_DISK) && (hdr->ih_type != IH_TYPE_FILESYSTEM)) {
		printf ("Image %s wrong type\n", aufile[idx]);
		return -1;
	}
	if ((idx == IDX_APP) && (hdr->ih_type != IH_TYPE_RAMDISK)
	    && (hdr->ih_type != IH_TYPE_FILESYSTEM)) {
		printf ("Image %s wrong type\n", aufile[idx]);
		return -1;
	}
	if ((idx == IDX_PREPARE || idx == IDX_PREINST || idx == IDX_POSTINST)
		&& (hdr->ih_type != IH_TYPE_SCRIPT))
	{
		printf ("Image %s wrong type\n", aufile[idx]);
		return -1;
	}
	/* special case for prepare.img */
	if (idx == IDX_PREPARE)
		return 0;
	/* recycle checksum */
	checksum = ntohl(hdr->ih_size);
	/* for kernel and app the image header must also fit into flash */
	if ((idx != IDX_DISK) && (idx != IDX_FIRMWARE))
		checksum += sizeof(*hdr);
	/* check the size does not exceed space in flash. HUSH scripts */
	/* all have ausize[] set to 0 */
	if ((ausize[idx] != 0) && (ausize[idx] < checksum)) {
		printf ("Image %s is bigger than FLASH\n", aufile[idx]);
		return -1;
	}
	/* check the time stamp from the EEPROM */
	/* read it in */
	i2c_read_multiple(0x54, auee_off[idx].time, 1, buf, sizeof(buf));
#ifdef CHECK_VALID_DEBUG
	printf ("buf[0] %#x buf[1] %#x buf[2] %#x buf[3] %#x "
		"as int %#x time %#x\n",
		buf[0], buf[1], buf[2], buf[3],
		*((unsigned int *)buf), ntohl(hdr->ih_time));
#endif
	/* check it */
	if (*((unsigned int *)buf) >= ntohl(hdr->ih_time)) {
		printf ("Image %s is too old\n", aufile[idx]);
		return -1;
	}

	return 0;
}

/* power control defines */
#define CPLD_VFD_BK ((volatile char *)0x04038002)
#define POWER_OFF (1 << 1)

int