board/mcc200/auto_update.c - platform/external/u-boot - Gitiles

 /*
  * (C) Copyright 2006
  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
  *
  * 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>
 #include <part.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

 #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_FIRMWARE	"u-boot.img"
 #define AU_KERNEL	"kernel.img"
 #define AU_ROOTFS	"rootfs.img"

 struct flash_layout {
 	long start;
 	long end;
 };

 /* layout of the FLASH. ST = start address, ND = end address. */
 #define AU_FL_FIRMWARE_ST	0xfC000000
 #define AU_FL_FIRMWARE_ND	0xfC03FFFF
 #define AU_FL_KERNEL_ST		0xfC0C0000
 #define AU_FL_KERNEL_ND		0xfC1BFFFF
 #define AU_FL_ROOTFS_ST		0xFC1C0000
 #define AU_FL_ROOTFS_ND		0xFCFBFFFF

 static int au_usb_stor_curr_dev; /* current device */

 /* index of each file in the following arrays */
 #define IDX_FIRMWARE	0
 #define IDX_KERNEL	1
 #define IDX_ROOTFS	2

 /* max. number of files which could interest us */
 #define AU_MAXFILES 3

 /* pointers to file names */
 char *aufile[AU_MAXFILES] = {
 	AU_FIRMWARE,
 	AU_KERNEL,
 	AU_ROOTFS
 };

 /* sizes of flash areas for each file */
 long ausize[AU_MAXFILES] = {
 	(AU_FL_FIRMWARE_ND + 1) - AU_FL_FIRMWARE_ST,
 	(AU_FL_KERNEL_ND   + 1) - AU_FL_KERNEL_ST,
 	(AU_FL_ROOTFS_ND   + 1) - AU_FL_ROOTFS_ST,
 };

 /* array of flash areas start and end addresses */
 struct flash_layout aufl_layout[AU_MAXFILES] = {
 	{ AU_FL_FIRMWARE_ST,	AU_FL_FIRMWARE_ND, },
 	{ AU_FL_KERNEL_ST,	AU_FL_KERNEL_ND,   },
 	{ AU_FL_ROOTFS_ST,	AU_FL_ROOTFS_ND,   },
 };

 ulong totsize;

 /* where to load files into memory */
 #define LOAD_ADDR ((unsigned char *)0x00200000)

 /* the root file system is the largest image */
 #define MAX_LOADSZ ausize[IDX_ROOTFS]

 /*i2c address of the keypad status*/
 #define I2C_PSOC_KEYPAD_ADDR	0x53

 /* keypad mask */
 #define KEYPAD_ROW	2
 #define KEYPAD_COL	2
 #define KEYPAD_MASK_LO	((1<<(KEYPAD_COL-1+(KEYPAD_ROW*3-3)))&0xFF)
 #define KEYPAD_MASK_HI	((1<<(KEYPAD_COL-1+(KEYPAD_ROW*3-3)))>>8)

 /* 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 flash_sect_erase(ulong, ulong);
 extern int flash_sect_protect (int, ulong, ulong);
 extern int flash_write (char *, ulong, ulong);
 extern int u_boot_hush_start(void);
 #ifdef CONFIG_PROGRESSBAR
 extern void show_progress(int, int);
 extern void lcd_puts (char *);
 extern void lcd_enable(void);
 #endif

 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, fsize;

 	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]);
 		ausize[idx] = 0;
 		return -1;
 	}
 	if (ntohl(hdr->ih_magic) != IH_MAGIC || hdr->ih_arch != IH_CPU_PPC) {
 		printf ("Image %s bad MAGIC or ARCH\n", aufile[idx]);
 		ausize[idx] = 0;
 		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]);
 		ausize[idx] = 0;
 		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]);
 		ausize[idx] = 0;
 		return -1;
 	}
 	if ((idx == IDX_KERNEL) && (hdr->ih_type != IH_TYPE_KERNEL)) {
 		printf ("Image %s wrong type\n", aufile[idx]);
 		ausize[idx] = 0;
 		return -1;
 	}
 	if ((idx == IDX_ROOTFS) &&
 		( (hdr->ih_type != IH_TYPE_RAMDISK) && (hdr->ih_type != IH_TYPE_FILESYSTEM) )
 	   ) {
 		printf ("Image %s wrong type\n", aufile[idx]);
 		ausize[idx] = 0;
 		return -1;
 	}
 	/* recycle checksum */
 	checksum = ntohl(hdr->ih_size);

 	fsize = checksum + sizeof(*hdr);
 	/* for kernel and ramdisk the image header must also fit into flash */
 	if (idx == IDX_KERNEL || hdr->ih_type == IH_TYPE_RAMDISK)
 		checksum += sizeof(*hdr);

 	/* check the size does not exceed space in flash. HUSH scripts */
 	if ((ausize[idx] != 0) && (ausize[idx] < checksum)) {
 		printf ("Image %s is bigger than FLASH\n", aufile[idx]);
 		ausize[idx] = 0;
 		return -1;
 	}
 	/* Update with the real filesize */
 	ausize[idx] = fsize;

 	return checksum; /* return size to be written to flash */
 }

 int au_do_update(int idx, long sz)
 {
 	image_header_t *hdr;
 	char *addr;
 	long start, end;
 	int off, rc;
 	uint nbytes;

 	hdr = (image_header_t *)LOAD_ADDR;

 	/* execute a script */
 	if (hdr->ih_type == IH_TYPE_SCRIPT) {
 		addr = (char *)((char *)hdr + sizeof(*hdr));
 		/* stick a NULL at the end of the script, otherwise */
 		/* parse_string_outer() runs off the end. */
 		addr[ntohl(hdr->ih_size)] = 0;
 		addr += 8;
 		parse_string_outer(addr, FLAG_PARSE_SEMICOLON);
 		return 0;
 	}

 	start = aufl_layout[idx].start;
 	end = aufl_layout[idx].end;

 	/* unprotect the address range */
 	/* this assumes that ONLY the firmware is protected! */
 	if (idx == IDX_FIRMWARE) {
 #undef AU_UPDATE_TEST
 #ifdef AU_UPDATE_TEST
 		/* erase it where Linux goes */
 		start = aufl_layout[1].start;
 		end = aufl_layout[1].end;
 #endif
 		flash_sect_protect(0, start, end);
 	}

 	/*
 	 * erase the address range.
 	 */
 	debug ("flash_sect_erase(%lx, %lx);\n", start, end);
 	flash_sect_erase(start, end);
 	wait_ms(100);
 #ifdef CONFIG_PROGRESSBAR
 	show_progress(end - start, totsize);
 #endif

 	/* strip the header - except for the kernel and ramdisk */
 	if (hdr->ih_type == IH_TYPE_KERNEL || hdr->ih_type == IH_TYPE_RAMDISK) {
 		addr = (char *)hdr;
 		off = sizeof(*hdr);
 		nbytes = sizeof(*hdr) + ntohl(hdr->ih_size);
 	} else {
 		addr = (char *)((char *)hdr + sizeof(*hdr));
 #ifdef AU_UPDATE_TEST
 		/* copy it to where Linux goes */
 		if (idx == IDX_FIRMWARE)
 			start = aufl_layout[1].start;
 #endif
 		off = 0;
 		nbytes = ntohl(hdr->ih_size);
 	}

 	/* copy the data from RAM to FLASH */
 	debug ("flash_write(%p, %lx %x)\n", addr, start, nbytes);
 	rc = flash_write(addr, start, nbytes);
 	if (rc != 0) {
 		printf("Flashing failed due to error %d\n", rc);
 		return -1;
 	}

 #ifdef CONFIG_PROGRESSBAR
 	show_progress(nbytes, totsize);
 #endif

 	/* check the data CRC of the copy */
 	if (crc32 (0, (uchar *)(start + off), ntohl(hdr->ih_size)) != ntohl(hdr->ih_dcrc)) {
 		printf ("Image %s Bad Data Checksum after COPY\n", aufile[idx]);
 		return -1;
 	}

 	/* protect the address range */
 	/* this assumes that ONLY the firmware is protected! */
 	if (idx == IDX_FIRMWARE)
 		flash_sect_protect(1, start, end);
 	return 0;
 }

 /*
  * this is called from board_init() after the hardware has been set up
  * and is usable. That seems like a good time to do this.
  * Right now the return value is ignored.
  */
 int do_auto_update(void)
 {
 	block_dev_desc_t *stor_dev;
 	long sz;
 	int i, res = 0, bitmap_first, cnt, old_ctrlc, got_ctrlc;
 	char *env;
 	long start, end;
 	uchar keypad_status1[2] = {0,0}, keypad_status2[2] = {0,0};

 	/*
 	 * Read keypad status
 	 */
 	i2c_read(I2C_PSOC_KEYPAD_ADDR, 0, 0, keypad_status1, 2);
 	wait_ms(500);
 	i2c_read(I2C_PSOC_KEYPAD_ADDR, 0, 0, keypad_status2, 2);

 	/*
 	 * Check keypad
 	 */
 	if ( !(keypad_status1[1] & KEYPAD_MASK_LO) ||
 	      (keypad_status1[1] != keypad_status2[1])) {
 		return 0;
 	}

 	au_usb_stor_curr_dev = -1;
 	/* start USB */
 	if (usb_stop() < 0) {
 		debug ("usb_stop failed\n");
 		return -1;
 	}
 	if (usb_init() < 0) {
 		debug ("usb_init failed\n");
 		return -1;
 	}
 	/*
 	 * check whether a storage device is attached (assume that it's
 	 * a USB memory stick, since nothing else should be attached).
 	 */
 	au_usb_stor_curr_dev = usb_stor_scan(0);
 	if (au_usb_stor_curr_dev == -1) {
 		debug ("No device found. Not initialized?\n");
 		return -1;
 	}
 	/* check whether it has a partition table */
 	stor_dev = get_dev("usb", 0);
 	if (stor_dev == NULL) {
 		debug ("uknown device type\n");
 		return -1;
 	}
 	if (fat_register_device(stor_dev, 1) != 0) {
 		debug ("Unable to use USB %d:%d for fatls\n",
 			au_usb_stor_curr_dev, 1);
 		return -1;
 	}
 	if (file_fat_detectfs() != 0) {
 		debug ("file_fat_detectfs failed\n");
 	}

 	/*
 	 * now check whether start and end are defined using environment
 	 * variables.
 	 */
 	start = -1;
 	end = 0;
 	env = getenv("firmware_st");
 	if (env != NULL)
 		start = simple_strtoul(env, NULL, 16);
 	env = getenv("firmware_nd");
 	if (env != NULL)
 		end = simple_strtoul(env, NULL, 16);
 	if (start >= 0 && end && end > start) {
 		ausize[IDX_FIRMWARE] = (end + 1) - start;
 		aufl_layout[IDX_FIRMWARE].start = start;
 		aufl_layout[IDX_FIRMWARE].end = end;
 	}
 	start = -1;
 	end = 0;
 	env = getenv("kernel_st");
 	if (env != NULL)
 		start = simple_strtoul(env, NULL, 16);
 	env = getenv("kernel_nd");
 	if (env != NULL)
 		end = simple_strtoul(env, NULL, 16);
 	if (start >= 0 && end && end > start) {
 		ausize[IDX_KERNEL] = (end + 1) - start;
 		aufl_layout[IDX_KERNEL].start = start;
 		aufl_layout[IDX_KERNEL].end = end;
 	}
 	start = -1;
 	end = 0;
 	env = getenv("rootfs_st");
 	if (env != NULL)
 		start = simple_strtoul(env, NULL, 16);
 	env = getenv("rootfs_nd");
 	if (env != NULL)
 		end = simple_strtoul(env, NULL, 16);
 	if (start >= 0 && end && end > start) {
 		ausize[IDX_ROOTFS] = (end + 1) - start;
 		aufl_layout[IDX_ROOTFS].start = start;
 		aufl_layout[IDX_ROOTFS].end = end;
 	}

 	/* make certain that HUSH is runnable */
 	u_boot_hush_start();
 	/* make sure that we see CTRL-C and save the old state */
 	old_ctrlc = disable_ctrlc(0);

 	bitmap_first = 0;

 	/* validate the images first */
 	for (i = 0; i < AU_MAXFILES; i++) {
 		ulong imsize;
 		/* just read the header */
 		sz = file_fat_read(aufile[i], LOAD_ADDR, sizeof(image_header_t));
 		debug ("read %s sz %ld hdr %d\n",
 			aufile[i], sz, sizeof(image_header_t));
 		if (sz <= 0 || sz < sizeof(image_header_t)) {
 			debug ("%s not found\n", aufile[i]);
 			ausize[i] = 0;
 			continue;
 		}
 		/* au_check_header_valid() updates ausize[] */
 		if ((imsize = au_check_header_valid(i, sz)) < 0) {
 			debug ("%s header not valid\n", aufile[i]);
 			continue;
 		}
 		/* totsize accounts for image size and flash erase size */
 		totsize += (imsize + (aufl_layout[i].end - aufl_layout[i].start));
 	}

 #ifdef CONFIG_PROGRESSBAR
 	if (totsize) {
 		lcd_puts(" Update in progress\n");
 		lcd_enable();
 	}
 #endif

 	/* just loop thru all the possible files */
 	for (i = 0; i < AU_MAXFILES && totsize; i++) {
 		if (!ausize[i]) {
 			continue;
 		}
 		sz = file_fat_read(aufile[i], LOAD_ADDR, ausize[i]);

 		debug ("read %s sz %ld hdr %d\n",
 			aufile[i], sz, sizeof(image_header_t));

 		if (sz != ausize[i]) {
 			printf ("%s: size %d read %d?\n", aufile[i], ausize[i], sz);
 			continue;
 		}

 		if (sz <= 0 || sz <= sizeof(image_header_t)) {
 			debug ("%s not found\n", aufile[i]);
 			continue;
 		}
 		if (au_check_cksum_valid(i, sz) < 0) {
 			debug ("%s checksum not valid\n", aufile[i]);
 			continue;
 		}
 		/* this is really not a good idea, but it's what the */
 		/* customer wants. */
 		cnt = 0;
 		got_ctrlc = 0;
 		do {
 			res = au_do_update(i, sz);
 			/* let the user break out of the loop */
 			if (ctrlc() || had_ctrlc()) {
 				clear_ctrlc();
 				if (res < 0)
 					got_ctrlc = 1;
 				break;
 			}
 			cnt++;
 #ifdef AU_TEST_ONLY
 		} while (res < 0 && cnt < (AU_MAXFILES + 1));
 		if (cnt < (AU_MAXFILES + 1))
 #else
 		} while (res < 0);
 #endif
 	}
 	usb_stop();
 	/* restore the old state */
 	disable_ctrlc(old_ctrlc);
 #ifdef CONFIG_PROGRESSBAR
 	if (totsize) {
 		if (!res) {
 			lcd_puts("\n  Update completed\n");
 		} else {
 			lcd_puts("\n   Update error\n");
 		}
 		lcd_enable();
 	}
 #endif
 	return 0;
 }
 #endif /* CONFIG_AUTO_UPDATE */
	/*
	* (C) Copyright 2006
	* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
	*
	* 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>
	#include <part.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

	#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_FIRMWARE "u-boot.img"
	#define AU_KERNEL "kernel.img"
	#define AU_ROOTFS "rootfs.img"

	struct flash_layout {
	long start;
	long end;
	};

	/* layout of the FLASH. ST = start address, ND = end address. */
	#define AU_FL_FIRMWARE_ST 0xfC000000
	#define AU_FL_FIRMWARE_ND 0xfC03FFFF
	#define AU_FL_KERNEL_ST 0xfC0C0000
	#define AU_FL_KERNEL_ND 0xfC1BFFFF
	#define AU_FL_ROOTFS_ST 0xFC1C0000
	#define AU_FL_ROOTFS_ND 0xFCFBFFFF

	static int au_usb_stor_curr_dev; /* current device */

	/* index of each file in the following arrays */
	#define IDX_FIRMWARE 0
	#define IDX_KERNEL 1
	#define IDX_ROOTFS 2

	/* max. number of files which could interest us */
	#define AU_MAXFILES 3

	/* pointers to file names */
	char *aufile[AU_MAXFILES] = {
	AU_FIRMWARE,
	AU_KERNEL,
	AU_ROOTFS
	};

	/* sizes of flash areas for each file */
	long ausize[AU_MAXFILES] = {
	(AU_FL_FIRMWARE_ND + 1) - AU_FL_FIRMWARE_ST,
	(AU_FL_KERNEL_ND + 1) - AU_FL_KERNEL_ST,
	(AU_FL_ROOTFS_ND + 1) - AU_FL_ROOTFS_ST,
	};

	/* array of flash areas start and end addresses */
	struct flash_layout aufl_layout[AU_MAXFILES] = {
	{ AU_FL_FIRMWARE_ST, AU_FL_FIRMWARE_ND, },
	{ AU_FL_KERNEL_ST, AU_FL_KERNEL_ND, },
	{ AU_FL_ROOTFS_ST, AU_FL_ROOTFS_ND, },
	};

	ulong totsize;

	/* where to load files into memory */
	#define LOAD_ADDR ((unsigned char *)0x00200000)

	/* the root file system is the largest image */
	#define MAX_LOADSZ ausize[IDX_ROOTFS]

	/i2c address of the keypad status/
	#define I2C_PSOC_KEYPAD_ADDR 0x53

	/* keypad mask */
	#define KEYPAD_ROW 2
	#define KEYPAD_COL 2
	#define KEYPAD_MASK_LO ((1<<(KEYPAD_COL-1+(KEYPAD_ROW*3-3)))&0xFF)
	#define KEYPAD_MASK_HI ((1<<(KEYPAD_COL-1+(KEYPAD_ROW*3-3)))>>8)

	/* 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 flash_sect_erase(ulong, ulong);
	extern int flash_sect_protect (int, ulong, ulong);
	extern int flash_write (char *, ulong, ulong);
	extern int u_boot_hush_start(void);
	#ifdef CONFIG_PROGRESSBAR
	extern void show_progress(int, int);
	extern void lcd_puts (char *);
	extern void lcd_enable(void);
	#endif

	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, fsize;

	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]);
	ausize[idx] = 0;
	return -1;
	}
	if (ntohl(hdr->ih_magic) != IH_MAGIC \|\| hdr->ih_arch != IH_CPU_PPC) {
	printf ("Image %s bad MAGIC or ARCH\n", aufile[idx]);
	ausize[idx] = 0;
	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]);
	ausize[idx] = 0;
	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]);
	ausize[idx] = 0;
	return -1;
	}
	if ((idx == IDX_KERNEL) && (hdr->ih_type != IH_TYPE_KERNEL)) {
	printf ("Image %s wrong type\n", aufile[idx]);
	ausize[idx] = 0;
	return -1;
	}
	if ((idx == IDX_ROOTFS) &&
	( (hdr->ih_type != IH_TYPE_RAMDISK) && (hdr->ih_type != IH_TYPE_FILESYSTEM) )
	) {
	printf ("Image %s wrong type\n", aufile[idx]);
	ausize[idx] = 0;
	return -1;
	}
	/* recycle checksum */
	checksum = ntohl(hdr->ih_size);

	fsize = checksum + sizeof(*hdr);
	/* for kernel and ramdisk the image header must also fit into flash */
	if (idx == IDX_KERNEL \|\| hdr->ih_type == IH_TYPE_RAMDISK)
	checksum += sizeof(*hdr);

	/* check the size does not exceed space in flash. HUSH scripts */
	if ((ausize[idx] != 0) && (ausize[idx] < checksum)) {
	printf ("Image %s is bigger than FLASH\n", aufile[idx]);
	ausize[idx] = 0;
	return -1;
	}
	/* Update with the real filesize */
	ausize[idx] = fsize;

	return checksum; /* return size to be written to flash */
	}

	int au_do_update(int idx, long sz)
	{
	image_header_t *hdr;
	char *addr;
	long start, end;
	int off, rc;
	uint nbytes;

	hdr = (image_header_t *)LOAD_ADDR;

	/* execute a script */
	if (hdr->ih_type == IH_TYPE_SCRIPT) {
	addr = (char )((char )hdr + sizeof(*hdr));
	/* stick a NULL at the end of the script, otherwise */
	/* parse_string_outer() runs off the end. */
	addr[ntohl(hdr->ih_size)] = 0;
	addr += 8;
	parse_string_outer(addr, FLAG_PARSE_SEMICOLON);
	return 0;
	}

	start = aufl_layout[idx].start;
	end = aufl_layout[idx].end;

	/* unprotect the address range */
	/* this assumes that ONLY the firmware is protected! */
	if (idx == IDX_FIRMWARE) {
	#undef AU_UPDATE_TEST
	#ifdef AU_UPDATE_TEST
	/* erase it where Linux goes */
	start = aufl_layout[1].start;
	end = aufl_layout[1].end;
	#endif
	flash_sect_protect(0, start, end);
	}

	/*
	* erase the address range.
	*/
	debug ("flash_sect_erase(%lx, %lx);\n", start, end);
	flash_sect_erase(start, end);
	wait_ms(100);
	#ifdef CONFIG_PROGRESSBAR
	show_progress(end - start, totsize);
	#endif

	/* strip the header - except for the kernel and ramdisk */
	if (hdr->ih_type == IH_TYPE_KERNEL \|\| hdr->ih_type == IH_TYPE_RAMDISK) {
	addr = (char *)hdr;
	off = sizeof(*hdr);
	nbytes = sizeof(*hdr) + ntohl(hdr->ih_size);
	} else {
	addr = (char )((char )hdr + sizeof(*hdr));
	#ifdef AU_UPDATE_TEST
	/* copy it to where Linux goes */
	if (idx == IDX_FIRMWARE)
	start = aufl_layout[1].start;
	#endif
	off = 0;
	nbytes = ntohl(hdr->ih_size);
	}

	/* copy the data from RAM to FLASH */
	debug ("flash_write(%p, %lx %x)\n", addr, start, nbytes);
	rc = flash_write(addr, start, nbytes);
	if (rc != 0) {
	printf("Flashing failed due to error %d\n", rc);
	return -1;
	}

	#ifdef CONFIG_PROGRESSBAR
	show_progress(nbytes, totsize);
	#endif

	/* check the data CRC of the copy */
	if (crc32 (0, (uchar *)(start + off), ntohl(hdr->ih_size)) != ntohl(hdr->ih_dcrc)) {
	printf ("Image %s Bad Data Checksum after COPY\n", aufile[idx]);
	return -1;
	}

	/* protect the address range */
	/* this assumes that ONLY the firmware is protected! */
	if (idx == IDX_FIRMWARE)
	flash_sect_protect(1, start, end);
	return 0;
	}

	/*
	* this is called from board_init() after the hardware has been set up
	* and is usable. That seems like a good time to do this.
	* Right now the return value is ignored.
	*/
	int do_auto_update(void)
	{
	block_dev_desc_t *stor_dev;
	long sz;
	int i, res = 0, bitmap_first, cnt, old_ctrlc, got_ctrlc;
	char *env;
	long start, end;
	uchar keypad_status1[2] = {0,0}, keypad_status2[2] = {0,0};

	/*
	* Read keypad status
	*/
	i2c_read(I2C_PSOC_KEYPAD_ADDR, 0, 0, keypad_status1, 2);
	wait_ms(500);
	i2c_read(I2C_PSOC_KEYPAD_ADDR, 0, 0, keypad_status2, 2);

	/*
	* Check keypad
	*/
	if ( !(keypad_status1[1] & KEYPAD_MASK_LO) \|\|
	(keypad_status1[1] != keypad_status2[1])) {
	return 0;
	}

	au_usb_stor_curr_dev = -1;
	/* start USB */
	if (usb_stop() < 0) {
	debug ("usb_stop failed\n");
	return -1;
	}
	if (usb_init() < 0) {
	debug ("usb_init failed\n");
	return -1;
	}
	/*
	* check whether a storage device is attached (assume that it's
	* a USB memory stick, since nothing else should be attached).
	*/
	au_usb_stor_curr_dev = usb_stor_scan(0);
	if (au_usb_stor_curr_dev == -1) {
	debug ("No device found. Not initialized?\n");
	return -1;
	}
	/* check whether it has a partition table */
	stor_dev = get_dev("usb", 0);
	if (stor_dev == NULL) {
	debug ("uknown device type\n");
	return -1;
	}
	if (fat_register_device(stor_dev, 1) != 0) {
	debug ("Unable to use USB %d:%d for fatls\n",
	au_usb_stor_curr_dev, 1);
	return -1;
	}
	if (file_fat_detectfs() != 0) {
	debug ("file_fat_detectfs failed\n");
	}

	/*
	* now check whether start and end are defined using environment
	* variables.
	*/
	start = -1;
	end = 0;
	env = getenv("firmware_st");
	if (env != NULL)
	start = simple_strtoul(env, NULL, 16);
	env = getenv("firmware_nd");
	if (env != NULL)
	end = simple_strtoul(env, NULL, 16);
	if (start >= 0 && end && end > start) {
	ausize[IDX_FIRMWARE] = (end + 1) - start;
	aufl_layout[IDX_FIRMWARE].start = start;
	aufl_layout[IDX_FIRMWARE].end = end;
	}
	start = -1;
	end = 0;
	env = getenv("kernel_st");
	if (env != NULL)
	start = simple_strtoul(env, NULL, 16);
	env = getenv("kernel_nd");
	if (env != NULL)
	end = simple_strtoul(env, NULL, 16);
	if (start >= 0 && end && end > start) {
	ausize[IDX_KERNEL] = (end + 1) - start;
	aufl_layout[IDX_KERNEL].start = start;
	aufl_layout[IDX_KERNEL].end = end;
	}
	start = -1;
	end = 0;
	env = getenv("rootfs_st");
	if (env != NULL)
	start = simple_strtoul(env, NULL, 16);
	env = getenv("rootfs_nd");
	if (env != NULL)
	end = simple_strtoul(env, NULL, 16);
	if (start >= 0 && end && end > start) {
	ausize[IDX_ROOTFS] = (end + 1) - start;
	aufl_layout[IDX_ROOTFS].start = start;
	aufl_layout[IDX_ROOTFS].end = end;
	}

	/* make certain that HUSH is runnable */
	u_boot_hush_start();
	/* make sure that we see CTRL-C and save the old state */
	old_ctrlc = disable_ctrlc(0);

	bitmap_first = 0;

	/* validate the images first */
	for (i = 0; i < AU_MAXFILES; i++) {
	ulong imsize;
	/* just read the header */
	sz = file_fat_read(aufile[i], LOAD_ADDR, sizeof(image_header_t));
	debug ("read %s sz %ld hdr %d\n",
	aufile[i], sz, sizeof(image_header_t));
	if (sz <= 0 \|\| sz < sizeof(image_header_t)) {
	debug ("%s not found\n", aufile[i]);
	ausize[i] = 0;
	continue;
	}
	/* au_check_header_valid() updates ausize[] */
	if ((imsize = au_check_header_valid(i, sz)) < 0) {
	debug ("%s header not valid\n", aufile[i]);
	continue;
	}
	/* totsize accounts for image size and flash erase size */
	totsize += (imsize + (aufl_layout[i].end - aufl_layout[i].start));
	}

	#ifdef CONFIG_PROGRESSBAR
	if (totsize) {
	lcd_puts(" Update in progress\n");
	lcd_enable();
	}
	#endif

	/* just loop thru all the possible files */
	for (i = 0; i < AU_MAXFILES && totsize; i++) {
	if (!ausize[i]) {
	continue;
	}
	sz = file_fat_read(aufile[i], LOAD_ADDR, ausize[i]);

	debug ("read %s sz %ld hdr %d\n",
	aufile[i], sz, sizeof(image_header_t));

	if (sz != ausize[i]) {
	printf ("%s: size %d read %d?\n", aufile[i], ausize[i], sz);
	continue;
	}

	if (sz <= 0 \|\| sz <= sizeof(image_header_t)) {
	debug ("%s not found\n", aufile[i]);
	continue;
	}
	if (au_check_cksum_valid(i, sz) < 0) {
	debug ("%s checksum not valid\n", aufile[i]);
	continue;
	}
	/* this is really not a good idea, but it's what the */
	/* customer wants. */
	cnt = 0;
	got_ctrlc = 0;
	do {
	res = au_do_update(i, sz);
	/* let the user break out of the loop */
	if (ctrlc() \|\| had_ctrlc()) {
	clear_ctrlc();
	if (res < 0)
	got_ctrlc = 1;
	break;
	}
	cnt++;
	#ifdef AU_TEST_ONLY
	} while (res < 0 && cnt < (AU_MAXFILES + 1));
	if (cnt < (AU_MAXFILES + 1))
	#else
	} while (res < 0);
	#endif
	}
	usb_stop();
	/* restore the old state */
	disable_ctrlc(old_ctrlc);
	#ifdef CONFIG_PROGRESSBAR
	if (totsize) {
	if (!res) {
	lcd_puts("\n Update completed\n");
	} else {
	lcd_puts("\n Update error\n");
	}
	lcd_enable();
	}
	#endif
	return 0;
	}
	#endif /* CONFIG_AUTO_UPDATE */