Exemplo n.º 1
0
/* Load mi4 firmware from a hidden disk partition */
int load_mi4_part(unsigned char* buf, struct partinfo* pinfo,
                  unsigned int buffer_size, bool disable_rebuild)
{
    struct mi4header_t mi4header;
    struct ppmi_header_t ppmi_header;
    unsigned long sum;
    
    /* Read header to find out how long the mi4 file is. */
    storage_read_sectors(pinfo->start + PPMI_SECTOR_OFFSET,
                         PPMI_SECTORS, &ppmi_header);
    
    /* The first four characters at 0x80000 (sector 1024) should be PPMI*/
    if( memcmp(ppmi_header.magic, "PPMI", 4) )
        return EFILE_NOT_FOUND;
    
    printf("BL mi4 size: %x", ppmi_header.length);
    
    /* Read mi4 header of the OF */
    storage_read_sectors(pinfo->start + PPMI_SECTOR_OFFSET + PPMI_SECTORS 
                       + (ppmi_header.length/512), MI4_HEADER_SECTORS, &mi4header);
    
    /* We don't support encrypted mi4 files yet */
    if( (mi4header.plaintext) != (mi4header.mi4size-MI4_HEADER_SIZE))
        return EINVALID_FORMAT;

    /* MI4 file size */
    printf("OF mi4 size: %x", mi4header.mi4size);

    if ((mi4header.mi4size-MI4_HEADER_SIZE) > buffer_size)
        return EFILE_TOO_BIG;

    /* CRC32 */
    printf("CRC32: %x", mi4header.crc32);

    /* Rockbox model id */
    printf("Model id: %.4s", mi4header.model);

    /* Read binary type (RBOS, RBBL) */
    printf("Binary type: %.4s", mi4header.type);

    /* Load firmware */
    storage_read_sectors(pinfo->start + PPMI_SECTOR_OFFSET + PPMI_SECTORS
                        + (ppmi_header.length/512) + MI4_HEADER_SECTORS,
                        (mi4header.mi4size-MI4_HEADER_SIZE)/512, buf);

    /* Check CRC32 to see if we have a valid file */
    sum = chksum_crc32 (buf,mi4header.mi4size-MI4_HEADER_SIZE);

    printf("Calculated CRC32: %x", sum);

    if(sum != mi4header.crc32)
        return EBAD_CHKSUM;
    
#ifdef SANSA_E200    
    if (disable_rebuild)
    {
        char block[512];
        
        printf("Disabling database rebuild");
        
        storage_read_sectors(pinfo->start + 0x3c08, 1, block);
        block[0xe1] = 0;
        storage_write_sectors(pinfo->start + 0x3c08, 1, block);
    }
#else
    (void) disable_rebuild;
#endif

    return mi4header.mi4size-MI4_HEADER_SIZE;
}
Exemplo n.º 2
0
void* main(void)
{
    int i;
    int btn;
    int num_partitions;
    int crc32;
    char sector[512];
    struct partinfo pinfo;

    system_init();
    kernel_init();
    lcd_init();
    font_init();
    button_init();
    i2c_init();
    backlight_hw_on();
    
    lcd_set_foreground(LCD_WHITE);
    lcd_set_background(LCD_BLACK);
    lcd_clear_display();

    btn = button_read_device();
    verbose = true;

    lcd_setfont(FONT_SYSFIXED);

    printf("Rockbox e200R installer");
    printf("Version: %s", rbversion);
    printf(MODEL_NAME);
    printf("");

    i=storage_init();
    filesystem_init();
    num_partitions = disk_mount_all();

    if (num_partitions<=0)
    {
        error(EDISK, num_partitions, true);
    }

    disk_partinfo(1, &pinfo);

#if 0 /* not needed in release builds */
    printf("--- Partition info ---");
    printf("start: %x", pinfo.start);
    printf("size: %x", pinfo.size);
    printf("type: %x", pinfo.type);
    printf("reading: %x", (START_SECTOR_OF_ROM + ROMSECTOR_TO_HACK)*512);
#endif

    storage_read_sectors(pinfo.start + START_SECTOR_OF_ROM + ROMSECTOR_TO_HACK,
                         1 , sector);
    crc32 = chksum_crc32 (sector, 512);

#if 0 /* not needed in release builds */
    printf("--- Hack Status ---");
    printf("Sector checksum: %x", crc32);
#endif

    if (crc32 == PATCHED_CRC32)
    {
        /* Bootloader already patched */
        printf("Already unlocked");
        printf("Proceed to Step 2");
    } else if ((crc32 == KNOWN_CRC32) && 
                !memcmp(&sector[HACK_OFFSET], knownBytes, 
                sizeof(knownBytes)/sizeof(*knownBytes)))
    {
        /* E200R bootloader detected - patch it */
        memcpy(&sector[HACK_OFFSET], changedBytes,
                sizeof(changedBytes)/sizeof(*changedBytes));
        storage_write_sectors(
                        pinfo.start + START_SECTOR_OF_ROM + ROMSECTOR_TO_HACK,
                        1 , sector);
        printf("Firmware unlocked");
        printf("Proceed to Step 2");
    } else if (is_e200(crc32))
    {
        printf("Vanilla E200 detected!");
        printf("Please install using");
        printf("Sansapatcher");
    }
    else
    {
        printf("Unknown bootloader");
        printf("Rockbox installer cannot");
        printf("continue");
    }

    /* Turn button lights off */
    GPIOG_OUTPUT_VAL &=~0x80;

    printf("");

    if (button_hold())
        printf("Release Hold and");

    printf("Press any key to shutdown");

    while(button_read_device() == BUTTON_NONE);

    power_off();

    return NULL;
}