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rockbox/bootloader/ipod.c
Linus Nielsen Feltzing 97d59dd38c Verbose error messages in the iPod bootloader 
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@12064 a1c6a512-1295-4272-9138-f99709370657
2007-01-18 10:07:07 +00:00

561 lines
13 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
*
* All files in this archive are subject to the GNU General Public License.
* See the file COPYING in the source tree root for full license agreement.
*
* 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"
#define XSC(X) #X
#define SC(X) XSC(X)
#if (CONFIG_CPU == PP5020)
#define DRAM_START 0x10000000
#else
#define IPOD_LCD_BASE 0xc0001000
#define DRAM_START 0x28000000
#endif
#define IPOD_HW_REVISION (*((volatile unsigned long*)(0x00002084)))
/* We copy the hardware revision to the last four bytes of SDRAM and then
re-read it after we have re-mapped SDRAM to 0x0 in Rockbox */
#define TMP_IPOD_HW_REVISION (*((volatile unsigned long*)(0x11fffffc)))
#define BUTTON_LEFT 1
#define BUTTON_MENU 2
#define BUTTON_RIGHT 3
#define BUTTON_PLAY 4
#define BUTTON_HOLD 5
/* Size of the buffer to store the loaded Rockbox/Linux/AppleOS image */
/* 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)
char version[] = APPSVERSION;
int line=0;
#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;
outl(inl(0x6000d004) & ~0x80, 0x6000d004);
outl(inl(0x7000c104) | 0xc000000, 0x7000c104);
outl(val, 0x7000c120);
outl(inl(0x7000c100) | 0x80000000, 0x7000c100);
outl(inl(0x6000d024) & ~0x10, 0x6000d024);
outl(inl(0x6000d014) | 0x10, 0x6000d014);
start_time = USEC_TIMER;
do {
if ((inl(0x7000c104) & 0x80000000) == 0) {
break;
}
} while (timer_check(start_time, 1500) != 0);
outl(inl(0x7000c100) & ~0x80000000, 0x7000c100);
outl(inl(0x6000d004) | 0x80, 0x6000d004);
outl(inl(0x6000d024) | 0x10, 0x6000d024);
outl(inl(0x6000d014) & ~0x10, 0x6000d014);
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
char *strerror(int error)
{
switch(error)
{
case 0:
return "OK";
case -1:
return "File not found";
case -2:
return "Read failed (chksum)";
case -3:
return "Read failed (model)";
case -4:
return "Read failed (image)";
case -5:
return "Bad checksum";
case -6:
return "File too big";
default:
return "Unknown";
}
}
char printfbuf[256];
void reset_screen(void)
{
lcd_clear_display();
line = 0;
}
void printf(const char *format, ...)
{
int len;
unsigned char *ptr;
va_list ap;
va_start(ap, format);
ptr = printfbuf;
len = vsnprintf(ptr, sizeof(printfbuf), format, ap);
va_end(ap);
lcd_puts(0, line++, ptr);
lcd_update();
if(line >= (LCD_HEIGHT/SYSFONT_HEIGHT))
line = 0;
}
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
state = inb(0xcf000030);
if (((state & 0x20) == 0)) return BUTTON_HOLD; /* hold on */
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;
}
/* This function is the same on all ipods */
bool button_hold(void)
{
return (GPIOA_INPUT_VAL & 0x20)?false:true;
}
int load_rockbox(unsigned char* buf, char* firmware)
{
int fd;
int rc;
int len;
unsigned long chksum;
char model[5];
unsigned long sum;
int i;
char filename[MAX_PATH];
snprintf(filename,sizeof(filename),"/.rockbox/%s",firmware);
fd = open(filename, O_RDONLY);
if(fd < 0)
{
snprintf(filename,sizeof(filename),"/%s",firmware);
fd = open(filename, O_RDONLY);
if(fd < 0)
return -1;
}
len = filesize(fd) - 8;
if (len > MAX_LOADSIZE)
return -6;
lseek(fd, FIRMWARE_OFFSET_FILE_CRC, SEEK_SET);
rc = read(fd, &chksum, 4);
chksum=betoh32(chksum); /* Rockbox checksums are big-endian */
if(rc < 4)
return -2;
rc = read(fd, model, 4);
if(rc < 4)
return -3;
model[4] = 0;
printf("Model: %s", model);
printf("Checksum: %x", chksum);
printf("Loading %s", firmware);
lseek(fd, FIRMWARE_OFFSET_FILE_DATA, SEEK_SET);
rc = read(fd, buf, len);
if(rc < len)
return -4;
close(fd);
sum = MODEL_NUMBER;
for(i = 0;i < len;i++) {
sum += buf[i];
}
printf("Sum: %x", sum);
if(sum != chksum)
return -5;
return len;
}
int load_linux(unsigned char* buf) {
int fd;
int rc;
int len;
fd=open("/linux.bin",O_RDONLY);
if (fd < 0)
return -1;
len=filesize(fd);
if (len > MAX_LOADSIZE)
return -6;
rc=read(fd,buf,len);
if (rc < len)
return -4;
printf("Loaded Linux: %d bytes", len);
return len;
}
/* A buffer to load the Linux kernel or Rockbox into */
unsigned char loadbuffer[MAX_LOADSIZE];
void fatal_error(void)
{
bool holdstatus=false;
/* System font is 6 pixels wide */
#if LCD_WIDTH >= (30*6)
printf("Press MENU+SELECT to reboot");
printf("then SELECT+PLAY for disk mode");
#else
printf("Press MENU+SELECT to");
printf("reboot then SELECT+PLAY");
printf("for disk mode");
#endif
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 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();
/* Turn on the backlight */
#if CONFIG_BACKLIGHT==BL_IPOD4G
/* brightness full */
outl(0x80000000 | (0xff << 16), 0x7000a010);
/* set port B03 on */
outl(((0x100 | 1) << 3), 0x6000d824);
#elif CONFIG_BACKLIGHT==BL_IPODMINI
/* set port B03 on */
outl(((0x100 | 1) << 3), 0x6000d824);
#elif CONFIG_BACKLIGHT==BL_IPODNANO
/* set port B03 on */
outl(((0x100 | 1) << 3), 0x6000d824);
/* set port L07 on */
outl(((0x100 | 1) << 7), 0x6000d12c);
#elif CONFIG_BACKLIGHT==BL_IPOD3G
outl(inl(IPOD_LCD_BASE) | 0x2, IPOD_LCD_BASE);
#endif
TMP_IPOD_HW_REVISION = IPOD_HW_REVISION;
ipod_hw_rev = IPOD_HW_REVISION;
system_init();
kernel_init();
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
line=0;
lcd_setfont(FONT_SYSFIXED);
printf("Rockbox boot loader");
printf("Version: 20%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);
/* See if there is an Apple firmware image in RAM */
haveretailos = (memcmp((void*)(DRAM_START+0x20),"portalplayer",12)==0);
/* We don't load Rockbox if the hold button is enabled. */
if (!button_was_held) {
/* Check for a keypress */
i=key_pressed();
if ((i!=BUTTON_MENU) && (i!=BUTTON_PLAY)) {
printf("Loading Rockbox...");
rc=load_rockbox(loadbuffer, BOOTFILE);
if (rc < 0) {
printf("Error!");
printf("Can't load rockbox.ipod:");
printf(strerror(rc));
} else {
printf("Rockbox loaded.");
memcpy((void*)DRAM_START,loadbuffer,rc);
return (void*)DRAM_START;
}
}
if (i==BUTTON_PLAY) {
printf("Loading Linux...");
rc=load_linux(loadbuffer);
if (rc < 0) {
printf("Error!");
printf("Can't load linux.bin:");
printf(strerror(rc));
} else {
memcpy((void*)DRAM_START,loadbuffer,rc);
return (void*)DRAM_START;
}
}
}
/* If either the hold switch was on, or loading Rockbox/IPL
failed, 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_rockbox(loadbuffer, "apple_os.ipod");
/* Only report errors if the file was found */
if (rc < -1) {
printf("Error!");
printf("Can't load apple_os.ipod:");
printf(strerror(rc));
} else if (rc > 0) {
printf("apple_os.ipod loaded.");
memcpy((void*)DRAM_START,loadbuffer,rc);
return (void*)DRAM_START;
}
if (haveretailos) {
/* We have a copy of the retailos in RAM, lets just run it. */
return (void*)DRAM_START;
}
/* Everything failed - just loop forever */
printf("No RetailOS detected");
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 reset_poweroff_timer(void)
{
}
int dbg_ports(void)
{
return 0;
}
void mpeg_stop(void)
{
}
void usb_acknowledge(void)
{
}
void usb_wait_for_disconnect(void)
{
}
void sys_poweroff(void)
{
}
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