download.c

PXA250上的XBOOT

/* 
 * $Id: download.c,v 1.5 2003/09/24 12:13:35 jfabo Exp $
 *
 * Copyright (C) 2001, 2002, 2003 ETC s.r.o.
 *
 * 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.
 *
 * Written by Marcel Telka <[e-mail]>, 2001, 2002.
 *	      	Juraj Fabo <[e-mail]>, 2003.
 *
 */

#include <_windows.h>

#include "board.h"

#if CPU == SA1110
#include <sa11x0/rc.h>
#include <sa11x0/gpio.h>
#endif

#if CPU == PXA250
#include <pxa2x0/pmrc.h>
#endif

#include "except.h"
#include "download.h"
#include "flash.h"
#include "format.h"
#include "splash.h"
#include ".config.h"
const static char boot_packet[] = {
	'\xAA', '\x55', '\x55', '\xAA', '\x00', '\x00',	/* boot packet header */
	'\x09', '\x00',				/* length */
	'\xFF', '\xFF', '\xFF', '\xFF',		/* boot type */
	'\xFA',					/* checksum */
	'\x5A', '\xA5', '\x0A', '\x1A'		/* packet tail */
};

#define	BOOT_PACKET_SIZE	(sizeof boot_packet / sizeof (char))

/* keep the same size of two following structures */
const static char sync_bytes[] = {
	'B', '0', '0', '0', 'F', 'F', '\n'
};
const static char upload_id[] = {
	'u', 'p', 'l', 'o', 'a', 'd', '\n'
};

#define	SIZE_OF_SYNC_BYTES	(sizeof sync_bytes / sizeof (char))

static unsigned int
read_dword( struct fntable *fn )
{
	unsigned int d = 0;

	fn->read(&((unsigned char)(d)), 4);
	return d;
}

void
download( struct fntable *fn, struct imginfo *img, int retry )
{
	int i;
	unsigned int *rec;
	unsigned char synchro[SIZE_OF_SYNC_BYTES];
#ifdef CONFIG_SPLASH_SCREEN
	unsigned char progress_percentage = 0;
	uint32_t total_len = 0;
#endif	
	/* send boot packet */
	for (i = 0; i < BOOT_PACKET_SIZE; i++)
		fn->writechar( boot_packet[i] );

	/* read sync bytes */
	for (i = 0; i < SIZE_OF_SYNC_BYTES; i++)
		fn->read(synchro + i, 1);

	/* check for upload/download */
	for (i = 0; i < SIZE_OF_SYNC_BYTES; i++) {
		if (sync_bytes[i] != synchro[i]){
			for (i = 0; i < SIZE_OF_SYNC_BYTES; i++) {
				if (upload_id[i] != synchro[i]) {
					Throw E_INVALIDSYNC;
				}
			}
			/* Here we know, that the PC wants to upload */
			Throw E_UPLOADREQUEST;
		}
	}

	img->start = read_dword( fn );
	img->len = read_dword( fn );

	img->copy = 0;
	switch (img->start & 0xFF000000) {
		case MEM_VIRT_FLASH:
		case MEM_PHYS_FLASH:
			img->copy = 1;
			img->target = MEM_VIRT_XBOOT_RUN + MEM_SIZE_XBOOT_RUN;
			break;
		case MEM_VIRT_SDRAM:
			img->target = img->start;
			break;
		case MEM_PHYS_SDRAM:
			img->target = img->start - MEM_PHYS_SDRAM + MEM_VIRT_SDRAM;
			break;
		default:
			Throw E_UNKNOWNMEMORY;
	}

	if (img->copy)
		rec = (void *) img->target;
	else
		rec = (void *) (img->target + img->len);

	for (;;) {
		unsigned int i;
		unsigned int calcsum = 0;
		unsigned char *dst;

		unsigned int addr = *rec++ = read_dword( fn );
		unsigned int len = *rec++ = read_dword( fn );
		unsigned int sum = *rec++ = read_dword( fn );
#ifdef CONFIG_SPLASH_SCREEN		
		unsigned int step = 0, remaining = 0;
		unsigned char *source;
#endif
		/* last record */
		if (!addr && !sum) {
			img->launch_addr = len;
#ifdef CONFIG_SPLASH_SCREEN
			progress_bar(100, 1);
#endif			
			return;
		}

		/* initialize dst pointer */
		if (img->copy) {
			dst = (void *) rec;
			if (len % sizeof *rec)
				Throw E_DATAALIGNMENT;
			rec += len / sizeof *rec;
		} else
			dst = (void *) (addr - img->start + img->target);
#ifndef CONFIG_SPLASH_SCREEN
		/* read data and copy to dst */
		fn->read(dst, len);
#else		/* CONFIG_SPLASH_SCREEN	*/		
		source = dst;
		step = (1024 < len) ? 1024:len;
		remaining = len;
		while(remaining){
			/* read data and copy to dst */
			fn->read(dst, step);
			total_len += step;
			if (((total_len * 100 )/ img->len ) > progress_percentage ){
				progress_percentage = (unsigned char)((total_len * 100 )/ img->len );
				progress_bar(progress_percentage, 1);
			}

			remaining -= step;
			dst += step;
			step = (1024 < remaining)?1024:remaining;
		}
		dst = source;
#endif
		/* calculate checksum */
		for (i = 0; i < len; i++)
			calcsum += *dst++;

		/* check errors */
		if (calcsum == sum) {
			if (retry)
				fn->writechar( 'O' );
		} else {
			if (!retry || img->copy)
				Throw E_CHECKSUM;
			fn->writechar( 'R' );
			rec -= 3;
		}
	}
}

int
DownloadImage( struct imginfo *img )
{
	int status = -2;

#if CPU == SA1110
	/* download external image only after hardware reset and if the power button is pressed */
	if ((RCSR & 1) && !(GPLR & GPIO_PWR_MASK)) {
#elif CPU == PXA250
	/* download external image only after hardware reset */
	if (RCSR & RCSR_HWR) {
        #else
	{
              #endif
              #ifdef HAVE_USB
		if (status == -2)
			status = USB_download( img );
              #endif
              #ifdef HAVE_PP
		if (status == -2)
			status = PP_download( img );
              #endif
		if (status == -2)
			status = Serial_download( img );
	}

	if (status == -2)
		status = Memory_download( img, (void *) MEM_VIRT_WINCE );			
	else if (status == 1) {
		EdbgOutputDebugString( "\nUpload completed.\n" );
	} else {
		EdbgOutputDebugString( "\nDownload complete. Starting FLASH!\n\n" );
		FlashImage( img, MEM_PHYS_WINCE - MEM_PHYS_FLASH );
		EdbgOutputDebugString( "FLASH successfull.\n" );
		status = 0;
	}

	return status;
}