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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2008 by Maurus Cuelenaere
*
* 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 software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include "config.h"
#include "jz4740.h"
#include "backlight.h"
#include "backlight-target.h"
#include "font.h"
#include "lcd.h"
#include "usb.h"
#include "system.h"
#include "button.h"
#include "common.h"
#include "storage.h"
#include "disk.h"
#include "string.h"
#include "adc.h"
extern int show_logo(void);
static void show_splash(int timeout, const char *msg)
{
reset_screen();
lcd_putsxy( (LCD_WIDTH - (SYSFONT_WIDTH * strlen(msg))) / 2,
(LCD_HEIGHT - SYSFONT_HEIGHT) / 2, msg);
lcd_update();
sleep(timeout);
}
static void usb_mode(void)
{
int button;
/* Init USB */
usb_init();
usb_start_monitoring();
/* Wait for threads to connect */
show_splash(HZ/2, "Waiting for USB");
while (1)
{
button = button_get_w_tmo(HZ/2);
if (button == SYS_USB_CONNECTED)
break; /* Hit */
}
if (button == SYS_USB_CONNECTED)
{
/* Got the message - wait for disconnect */
show_splash(0, "Bootloader USB mode");
usb_acknowledge(SYS_USB_CONNECTED_ACK);
while (1)
{
button = button_get(true);
if (button == SYS_USB_DISCONNECTED)
{
usb_acknowledge(SYS_USB_DISCONNECTED_ACK);
break;
}
}
}
reset_screen();
}
static int boot_of(void)
{
int fd, rc, len, i, checksum = 0;
void (*kernel_entry)(int, void*, void*);
/* TODO: get this from the NAND flash instead of SD */
fd = open("/ccpmp.bin", O_RDONLY);
if(fd < 0)
return EFILE_NOT_FOUND;
lseek(fd, 4, SEEK_SET);
rc = read(fd, (char*)&len, 4); /* CPU is LE */
if(rc < 4)
return EREAD_IMAGE_FAILED;
len += 8;
printf("Reading %d bytes...", len);
lseek(fd, 0, SEEK_SET);
rc = read(fd, (void*)0x80004000, len);
if(rc < len)
return EREAD_IMAGE_FAILED;
close(fd);
for(i=0; i<len; i++)
checksum += ((unsigned char*)0x80004000)[i];
*((unsigned int*)0x80004000) = checksum;
printf("Starting the OF...");
/* OF requires all clocks on */
__cpm_start_all();
disable_interrupt();
__dcache_writeback_all();
__icache_invalidate_all();
for(i=8000; i>0; i--)
asm volatile("nop\n");
kernel_entry = (void*) 0x80004008;
kernel_entry(0, "Jan 10 2008", "15:34:42"); /* Reversed from the SPL */
return 0;
}
int main(void)
{
int rc;
#ifdef HAVE_TOUCHSCREEN
int dummy;
#endif
void (*kernel_entry)(void);
kernel_init();
lcd_init();
font_init();
lcd_setfont(FONT_SYSFIXED);
button_init();
backlight_init();
show_logo();
rc = storage_init();
if(rc)
error(EATA, rc);
#ifdef HAVE_TOUCHSCREEN
rc = button_read_device(&dummy);
#else
rc = button_read_device();
#endif
if(rc)
verbose = true;
if(rc & BUTTON_VOL_UP)
usb_mode();
if(verbose)
reset_screen();
printf(MODEL_NAME" Rockbox Bootloader");
printf("Version "APPSVERSION);
rc = disk_mount_all();
if (rc <= 0)
error(EDISK,rc);
if(button_hold())
{
rc = boot_of();
if(rc < 0)
printf("Error: %s", strerror(rc));
}
printf("Loading firmware");
rc = load_firmware((unsigned char *)CONFIG_SDRAM_START, BOOTFILE, 0x400000);
if(rc < 0)
printf("Error: %s", strerror(rc));
if (rc == EOK)
{
printf("Starting Rockbox...");
adc_close(); /* Disable SADC */
_backlight_off(); /* Force backlight off to prevent LCD 'flicker' */
disable_interrupt();
kernel_entry = (void*) CONFIG_SDRAM_START;
kernel_entry();
}
/* Halt */
while (1)
core_idle();
return 0;
}
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