diff options
Diffstat (limited to 'bootloader/ipod.c')
| -rw-r--r-- | bootloader/ipod.c | 165 |
1 files changed, 124 insertions, 41 deletions
diff --git a/bootloader/ipod.c b/bootloader/ipod.c index 878ef10..aa4d5ec 100644 --- a/bootloader/ipod.c +++ b/bootloader/ipod.c @@ -60,8 +60,12 @@ #define BUTTON_PLAY 4 #define BUTTON_HOLD 5 -/* Size of the buffer to store the loaded Rockbox/Linux image */ -#define MAX_LOADSIZE (4*1024*1024) +/* 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; @@ -181,7 +185,13 @@ static int key_pressed(void) return 0; } -int load_rockbox(unsigned char* buf) +/* 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; @@ -191,11 +201,14 @@ int load_rockbox(unsigned char* buf) unsigned long sum; int i; char str[80]; - - fd = open("/.rockbox/" BOOTFILE, O_RDONLY); + char filename[MAX_PATH]; + + snprintf(filename,sizeof(filename),"/.rockbox/%s",firmware); + fd = open(filename, O_RDONLY); if(fd < 0) { - fd = open("/" BOOTFILE, O_RDONLY); + snprintf(filename,sizeof(filename),"/%s",firmware); + fd = open(filename, O_RDONLY); if(fd < 0) return -1; } @@ -222,6 +235,8 @@ int load_rockbox(unsigned char* buf) lcd_puts(0, line++, str); snprintf(str, 80, "Checksum: %x", chksum); lcd_puts(0, line++, str); + snprintf(str, 80, "Loading %s", firmware); + lcd_puts(0, line++, str); lcd_update(); lseek(fd, FIRMWARE_OFFSET_FILE_DATA, SEEK_SET); @@ -279,14 +294,46 @@ int load_linux(unsigned char* buf) { /* A buffer to load the Linux kernel or Rockbox into */ unsigned char loadbuffer[MAX_LOADSIZE]; +void fatal_error(void) +{ + bool holdstatus=false; + + lcd_puts(0, line++, "Press MENU+SELECT to reboot"); + lcd_puts(0, line++, "then SELECT+PLAY for disk mode"); + 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 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 @@ -319,6 +366,12 @@ void* main(void) 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(); @@ -360,8 +413,7 @@ void* main(void) if (rc<=0) { lcd_puts(0, line++, "No partition found"); - lcd_update(); -// while(button_get(true) != SYS_USB_CONNECTED) {}; + fatal_error(); } pinfo = disk_partinfo(1); @@ -370,51 +422,82 @@ void* main(void) lcd_puts(0, line++, buf); lcd_update(); - /* Check for a keypress */ - i=key_pressed(); + /* See if there is an Apple firmware image in RAM */ + haveretailos = (memcmp((void*)(DRAM_START+0x20),"portalplayer",12)==0); - if ((i!=BUTTON_MENU) && (i!=BUTTON_PLAY)) { - lcd_puts(0, line, "Loading Rockbox..."); - lcd_update(); - rc=load_rockbox(loadbuffer); - if (rc < 0) { - snprintf(buf, sizeof(buf), "Rockbox error: %d",rc); - lcd_puts(0, line++, buf); - lcd_update(); - } else { - lcd_puts(0, line++, "Rockbox loaded."); + /* 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)) { + lcd_puts(0, line, "Loading Rockbox..."); lcd_update(); - memcpy((void*)DRAM_START,loadbuffer,rc); - return (void*)DRAM_START; + rc=load_rockbox(loadbuffer, BOOTFILE); + if (rc < 0) { + snprintf(buf, sizeof(buf), "Rockbox error: %d",rc); + lcd_puts(0, line++, buf); + lcd_update(); + } else { + lcd_puts(0, line++, "Rockbox loaded."); + lcd_update(); + memcpy((void*)DRAM_START,loadbuffer,rc); + return (void*)DRAM_START; + } } - } - if (i==BUTTON_PLAY) { - lcd_puts(0, line, "Loading Linux..."); - lcd_update(); - rc=load_linux(loadbuffer); - if (rc < 0) { - snprintf(buf, sizeof(buf), "Linux error: %d",rc); - lcd_puts(0, line++, buf); + if (i==BUTTON_PLAY) { + lcd_puts(0, line, "Loading Linux..."); lcd_update(); - } else { - memcpy((void*)DRAM_START,loadbuffer,rc); - return (void*)DRAM_START; + rc=load_linux(loadbuffer); + if (rc < 0) { + snprintf(buf, sizeof(buf), "Linux error: %d",rc); + lcd_puts(0, line++, buf); + lcd_update(); + } else { + memcpy((void*)DRAM_START,loadbuffer,rc); + return (void*)DRAM_START; + } } } - /* If everything else failed, try the original firmware */ + + /* If either the hold switch was on, or loading Rockbox/IPL + failed, then try the Apple firmware */ + lcd_puts(0, line, "Loading original firmware..."); lcd_update(); - /* The original firmware should already be at the correct location - in RAM - the Rockbox bootloader has been appended to the end of - it, and the "entryOffset" in the firmware header modified to - tell the Apple bootloader to pass execution to our bootloader, - rather than the start of the original firmware - which is - always at the start of RAM. */ + /* 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) { + snprintf(buf, sizeof(buf), "apple_os.ipod error: %d",rc); + lcd_puts(0, line++, buf); + lcd_update(); + } else if (rc > 0) { + lcd_puts(0, line++, "apple_os.ipod loaded."); + lcd_update(); + 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 */ + lcd_puts(0, line++, "No RetailOS detected"); + + fatal_error(); - return (void*)DRAM_START; + /* We never get here, but keep gcc happy */ + return (void*)0; } /* These functions are present in the firmware library, but we reimplement |