c76c568b35
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@4995 a1c6a512-1295-4272-9138-f99709370657
140 lines
4.2 KiB
C
140 lines
4.2 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2002 Randy D. Wood
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*
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* All files in this archive are subject to the GNU General Public License.
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* See the file COPYING in the source tree root for full license agreement.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#include "lcd.h"
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#include "kernel.h"
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#include "sprintf.h"
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#include "button.h"
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#include "file.h"
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#include "mpeg.h"
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#include "system.h"
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#include "i2c.h"
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#include "string.h"
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#include "buffer.h"
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#define IRQ0_EDGE_TRIGGER 0x80
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static void rolo_error(const char *text)
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{
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lcd_clear_display();
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lcd_puts(0, 0, "ROLO error:");
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lcd_puts_scroll(0, 1, text);
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lcd_update();
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button_get(true);
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button_get(true);
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button_get(true);
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lcd_stop_scroll();
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}
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/* these are in assembler file "descramble.S" */
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extern unsigned short descramble(const unsigned char* source,
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unsigned char* dest, int length);
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extern void rolo_restart(const unsigned char* source, unsigned char* dest,
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int length);
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/***************************************************************************
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*
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* Name: rolo_load_app(char *filename,int scrambled)
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* Filename must be a fully defined filename including the path and extension
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*
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***************************************************************************/
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int rolo_load(const char* filename)
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{
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int fd;
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unsigned long length;
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unsigned long file_length;
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unsigned short checksum,file_checksum;
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unsigned char* ramstart = (void*)0x09000000;
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lcd_clear_display();
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lcd_puts(0, 0, "ROLO...");
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lcd_puts(0, 1, "Loading");
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lcd_update();
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mpeg_stop();
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fd = open(filename, O_RDONLY);
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if(-1 == fd) {
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rolo_error("File not found");
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return -1;
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}
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/* Read file length from header and compare to real file length */
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length=lseek(fd,0,SEEK_END)-FIRMWARE_OFFSET_FILE_DATA;
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lseek(fd, FIRMWARE_OFFSET_FILE_LENGTH, SEEK_SET);
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if(read(fd, &file_length, 4) != 4) {
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rolo_error("Error Reading File Length");
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return -1;
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}
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if (length != file_length) {
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rolo_error("File length mismatch");
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return -1;
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}
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/* Read and save checksum */
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lseek(fd, FIRMWARE_OFFSET_FILE_CRC, SEEK_SET);
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if (read(fd, &file_checksum, 2) != 2) {
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rolo_error("Error Reading checksum");
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return -1;
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}
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lseek(fd, FIRMWARE_OFFSET_FILE_DATA, SEEK_SET);
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/* verify that file can be read and descrambled */
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if ((mp3buf + (2*length)+4) >= mp3end) {
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rolo_error("Not enough room to load file");
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return -1;
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}
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if (read(fd, &mp3buf[length], length) != (int)length) {
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rolo_error("Error Reading File");
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return -1;
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}
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lcd_puts(0, 1, "Descramble");
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lcd_update();
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checksum = descramble(mp3buf + length, mp3buf, length);
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/* Verify checksum against file header */
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if (checksum != file_checksum) {
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rolo_error("Checksum Error");
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return -1;
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}
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lcd_puts(0, 1, "Executing ");
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lcd_update();
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/* Disable interrupts */
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asm("mov #15<<4,r6\n"
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"ldc r6,sr");
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/* Calling these 2 initialization routines was necessary to get the
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the origional Archos version of the firmware to load and execute. */
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system_init(); /* Initialize system for restart */
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i2c_init(); /* Init i2c bus - it seems like a good idea */
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ICR = IRQ0_EDGE_TRIGGER; /* Make IRQ0 edge triggered */
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#ifndef ARCHOS_PLAYER /* player is to be checked later */
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PAIOR = 0x0FA0; /* needed when flashed, probably model-specific */
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#endif
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rolo_restart(mp3buf, ramstart, length);
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return 0; /* this is never reached */
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}
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