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rockbox/bootloader/ipod.c
Daniel Stenberg 2acc0ac542 Updated our source code header to explicitly mention that we are GPL v2 or 
later. We still need to hunt down snippets used that are not. 1324 modified
files...
http://www.rockbox.org/mail/archive/rockbox-dev-archive-2008-06/0060.shtml


git-svn-id: svn://svn.rockbox.org/rockbox/trunk@17847 a1c6a512-1295-4272-9138-f99709370657
2008-06-28 18:10:04 +00:00

374 lines
9.7 KiB
C
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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2005 by Dave Chapman
*
* Based on Rockbox iriver bootloader by Linus Nielsen Feltzing
* and the ipodlinux bootloader by Daniel Palffy and Bernard Leach
*
* 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 <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <stdarg.h>
#include "cpu.h"
#include "system.h"
#include "lcd.h"
#include "kernel.h"
#include "thread.h"
#include "ata.h"
#include "fat.h"
#include "disk.h"
#include "font.h"
#include "adc.h"
#include "backlight.h"
#include "panic.h"
#include "power.h"
#include "file.h"
#include "common.h"
#include "hwcompat.h"
#define XSC(X) #X
#define SC(X) XSC(X)
/* Maximum allowed firmware image size. The largest known current
(December 2006) firmware is about 7.5MB (Apple's firmware for the ipod video)
so we set this to 8MB. */
#define MAX_LOADSIZE (8*1024*1024)
/* A buffer to load the Linux kernel or Rockbox into */
unsigned char *loadbuffer = (unsigned char *)DRAM_START;
/* Bootloader version */
char version[] = APPSVERSION;
#define BUTTON_LEFT 1
#define BUTTON_MENU 2
#define BUTTON_RIGHT 3
#define BUTTON_PLAY 4
#define BUTTON_HOLD 5
#if CONFIG_KEYPAD == IPOD_4G_PAD && !defined(IPOD_MINI)
/* check if number of seconds has past */
int timer_check(int clock_start, unsigned int usecs)
{
if ((USEC_TIMER - clock_start) >= usecs) {
return 1;
} else {
return 0;
}
}
static void ser_opto_keypad_cfg(int val)
{
int start_time;
GPIOB_ENABLE &=~ 0x80;
outl(inl(0x7000c104) | 0xc000000, 0x7000c104);
outl(val, 0x7000c120);
outl(inl(0x7000c100) | 0x80000000, 0x7000c100);
GPIOB_OUTPUT_VAL &=~ 0x10;
GPIOB_OUTPUT_EN |= 0x10;
start_time = USEC_TIMER;
do {
if ((inl(0x7000c104) & 0x80000000) == 0) {
break;
}
} while (timer_check(start_time, 1500) != 0);
outl(inl(0x7000c100) & ~0x80000000, 0x7000c100);
GPIOB_ENABLE |= 0x80;
GPIOB_OUTPUT_VAL |= 0x10;
GPIOB_OUTPUT_EN &=~0x10;
outl(inl(0x7000c104) | 0xc000000, 0x7000c104);
outl(inl(0x7000c100) | 0x60000000, 0x7000c100);
}
int opto_keypad_read(void)
{
int loop_cnt, had_io = 0;
for (loop_cnt = 5; loop_cnt != 0;)
{
int key_pressed = 0;
int start_time;
unsigned int key_pad_val;
ser_opto_keypad_cfg(0x8000023a);
start_time = USEC_TIMER;
do {
if (inl(0x7000c104) & 0x4000000) {
had_io = 1;
break;
}
if (had_io != 0) {
break;
}
} while (timer_check(start_time, 1500) != 0);
key_pad_val = inl(0x7000c140);
if ((key_pad_val & ~0x7fff0000) != 0x8000023a) {
loop_cnt--;
} else {
key_pad_val = (key_pad_val << 11) >> 27;
key_pressed = 1;
}
outl(inl(0x7000c100) | 0x60000000, 0x7000c100);
outl(inl(0x7000c104) | 0xc000000, 0x7000c104);
if (key_pressed != 0) {
return key_pad_val ^ 0x1f;
}
}
return 0;
}
#endif
static int key_pressed(void)
{
unsigned char state;
#if CONFIG_KEYPAD == IPOD_4G_PAD
#ifdef IPOD_MINI /* mini 1G only */
state = GPIOA_INPUT_VAL & 0x3f;
if ((state & 0x10) == 0) return BUTTON_LEFT;
if ((state & 0x2) == 0) return BUTTON_MENU;
if ((state & 0x4) == 0) return BUTTON_PLAY;
if ((state & 0x8) == 0) return BUTTON_RIGHT;
#else
state = opto_keypad_read();
if ((state & 0x4) == 0) return BUTTON_LEFT;
if ((state & 0x10) == 0) return BUTTON_MENU;
if ((state & 0x8) == 0) return BUTTON_PLAY;
if ((state & 0x2) == 0) return BUTTON_RIGHT;
#endif
#elif (CONFIG_KEYPAD == IPOD_3G_PAD) || (CONFIG_KEYPAD == IPOD_1G2G_PAD)
state = GPIOA_INPUT_VAL;
if ((state & 0x08) == 0) return BUTTON_LEFT;
if ((state & 0x10) == 0) return BUTTON_MENU;
if ((state & 0x04) == 0) return BUTTON_PLAY;
if ((state & 0x01) == 0) return BUTTON_RIGHT;
#endif
return 0;
}
bool button_hold(void)
{
#if CONFIG_KEYPAD == IPOD_1G2G_PAD
return (GPIOA_INPUT_VAL & 0x20);
#else
return !(GPIOA_INPUT_VAL & 0x20);
#endif
}
void fatal_error(void)
{
extern int line;
bool holdstatus=false;
/* System font is 6 pixels wide */
#if defined(IPOD_1G2G) || defined(IPOD_3G)
printf("Hold MENU+PLAY to");
printf("reboot then REW+FF");
printf("for disk mode");
#elif LCD_WIDTH >= (30*6)
printf("Hold MENU+SELECT to reboot");
printf("then SELECT+PLAY for disk mode");
#else
printf("Hold MENU+SELECT to");
printf("reboot then SELECT+PLAY");
printf("for disk mode");
#endif
lcd_update();
while (1) {
if (button_hold() != holdstatus) {
if (button_hold()) {
holdstatus=true;
lcd_puts(0, line, "Hold switch on!");
} else {
holdstatus=false;
lcd_puts(0, line, " ");
}
lcd_update();
}
udelay(100000); /* 100ms */
}
}
void* main(void)
{
char buf[256];
int i;
int btn;
int rc;
bool haveretailos;
bool button_was_held;
struct partinfo* pinfo;
unsigned short* identify_info;
/* Check the button hold status as soon as possible - to
give the user maximum chance to turn it off in order to
reset the settings in rockbox. */
button_was_held = button_hold();
system_init();
kernel_init();
#ifndef HAVE_BACKLIGHT_INVERSION
backlight_init(); /* Turns on the backlight */
#endif
lcd_init();
font_init();
#ifdef HAVE_LCD_COLOR
lcd_set_foreground(LCD_WHITE);
lcd_set_background(LCD_BLACK);
lcd_clear_display();
#endif
#if 0
/* ADC and button drivers are not yet implemented */
adc_init();
button_init();
#endif
btn=key_pressed();
/* Enable bootloader messages */
if (btn==BUTTON_RIGHT)
verbose = true;
lcd_setfont(FONT_SYSFIXED);
printf("Rockbox boot loader");
printf("Version: %s", version);
printf("IPOD version: 0x%08x", IPOD_HW_REVISION);
i=ata_init();
if (i==0) {
identify_info=ata_get_identify();
/* Show model */
for (i=0; i < 20; i++) {
((unsigned short*)buf)[i]=htobe16(identify_info[i+27]);
}
buf[40]=0;
for (i=39; i && buf[i]==' '; i--) {
buf[i]=0;
}
printf(buf);
} else {
printf("ATA: %d", i);
}
disk_init();
rc = disk_mount_all();
if (rc<=0)
{
printf("No partition found");
fatal_error();
}
pinfo = disk_partinfo(1);
printf("Partition 1: 0x%02x %ld MB",
pinfo->type, pinfo->size / 2048);
if (button_was_held || (btn==BUTTON_MENU)) {
/* If either the hold switch was on, or the Menu button was held, then
try the Apple firmware */
printf("Loading original firmware...");
/* First try an apple_os.ipod file on the FAT32 partition
(either in .rockbox or the root)
*/
rc=load_firmware(loadbuffer, "apple_os.ipod", MAX_LOADSIZE);
if (rc == EOK) {
printf("apple_os.ipod loaded.");
return (void*)DRAM_START;
} else if (rc == EFILE_NOT_FOUND) {
/* If apple_os.ipod doesn't exist, then check if there is an Apple
firmware image in RAM */
haveretailos = (memcmp((void*)(DRAM_START+0x20),"portalplayer",12)==0);
if (haveretailos) {
/* We have a copy of the retailos in RAM, lets just run it. */
return (void*)DRAM_START;
}
} else if (rc < EFILE_NOT_FOUND) {
printf("Error!");
printf("Can't load apple_os.ipod:");
printf(strerror(rc));
}
/* Everything failed - just loop forever */
printf("No RetailOS detected");
} else if (btn==BUTTON_PLAY) {
printf("Loading Linux...");
rc=load_raw_firmware(loadbuffer, "/linux.bin", MAX_LOADSIZE);
if (rc < EOK) {
printf("Error!");
printf("Can't load linux.bin:");
printf(strerror(rc));
} else {
return (void*)DRAM_START;
}
} else {
printf("Loading Rockbox...");
rc=load_firmware(loadbuffer, BOOTFILE, MAX_LOADSIZE);
if (rc < EOK) {
printf("Error!");
printf("Can't load rockbox.ipod:");
printf(strerror(rc));
} else {
printf("Rockbox loaded.");
return (void*)DRAM_START;
}
}
/* If we get to here, then we haven't been able to load any firmware */
fatal_error();
/* We never get here, but keep gcc happy */
return (void*)0;
}
/* These functions are present in the firmware library, but we reimplement
them here because the originals do a lot more than we want */
void usb_acknowledge(void)
{
}
void usb_wait_for_disconnect(void)
{
}
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