android系统移植emmc记录(6)--sd卡烧写文件分析

 

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cmd_fastboot.c

命令格式：

sdfuse flash kernel zImage

sdfuse flash system system.ext3

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int do_sdfuse (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
{
	int ret = 1;
	int enable_reset = 0;
	struct mmc *mmc = find_mmc_device(CFG_FASTBOOT_SDFUSE_MMCDEV);

	if (mmc_init(mmc)) {
		printf("sdmmc init is failed.\n");
	}

	interface.nand_block_size	= CFG_FASTBOOT_PAGESIZE * 64;
	interface.transfer_buffer	= (unsigned char *) CFG_FASTBOOT_TRANSFER_BUFFER;
	interface.transfer_buffer_size	= CFG_FASTBOOT_TRANSFER_BUFFER_SIZE;
    //add by xiao@2012-04-17 ：当emmc为空片时，可以支持sd卡直接格式化emmc，并分区。
    #ifdef CONFIG_EMMC_INAND
        printf("[ Check emmc 0 MBR label..]\n");
        if(fdisk_emmc0_partition() == 0){
           //format_part_dos();    //mmcblk0p1
            format_part_ext3(2); //mmcblk0p2
            format_part_ext3(3); //mmcblk0p3
            format_part_ext3(4); //mmcblk0p4
        }
    #endif

    printf("[Fusing Image from SD Card.]\n");

	if (set_partition_table())
		return 1;
         if ((argc == 2) && !strcmp(argv[1], "flashall"))
	{

//sdfuse flash bootloader u-boot.bin
//sdfuse flash kernel kernel.img
//sdfuse flash ramdisk ramdisk.img
//sdfuse flash system system.img
        //add by xiao@2012-04-17     修改文件，支持sd烧写   
        if (update_from_sd("bootloader", "u-boot_emmc.bin"))
			goto err_sdfuse;
            
        if (update_from_sd("kernel", "zImage"))
			goto err_sdfuse;
           
        if (update_from_sd("system", "system.ext3"))
			goto err_sdfuse;
              
        if (update_from_sd("userdata", NULL))
			goto err_sdfuse;
               
	if (update_from_sd("cache", NULL))
			goto err_sdfuse;
        delay1s();
		delay1s();
		delay1s();
		enable_reset = 1;
		ret = 0;
	}
	else if ((argc == 4) && !strcmp(argv[1], "flash"))
	{
		LCD_turnon();

		if (update_from_sd(argv[2], argv[3]))
			goto err_sdfuse;

		ret = 0;
	}
	else if ((argc == 3) && !strcmp(argv[1], "erase"))
	{
		LCD_turnon();

		if (update_from_sd(argv[2], NULL))
			goto err_sdfuse;

		ret = 0;
	}
	else
	{
		printf("Usage:\n%s\n", cmdtp->usage);
		return 1;
	}



err_sdfuse:
	LCD_setfgcolor(0x000010);
	LCD_setleftcolor(0x000010);
	LCD_setprogress(100);

	if (enable_reset)
		do_reset (NULL, 0, 0, NULL);

	return ret;
}

static int update_from_sd (char *part, char *file)
{
	int ret = 1;

	/* Read file */
	if (file != NULL)
	{
		long size;
		unsigned long offset;
		unsigned long count;
		char filename[32];
		block_dev_desc_t *dev_desc=NULL;

		printf("Partition: %s, File: %s/%s\n", part, CFG_FASTBOOT_SDFUSE_DIR, file);
		// LCD_setfgcolor(0x2E8B57);
		// LCD_setprogress(100);
		dev_desc = get_dev("mmc", CFG_FASTBOOT_SDFUSE_MMCDEV);
		if (dev_desc == NULL) {
			printf ("** Invalid boot device **\n");
			return 1;
		}
		if (fat_register_device(dev_desc, CFG_FASTBOOT_SDFUSE_MMCPART) != 0) {
			printf ("** Invalid partition **\n");
			return 1;
		}
		sprintf(filename, "%s/%s", CFG_FASTBOOT_SDFUSE_DIR, file);
		offset = CFG_FASTBOOT_TRANSFER_BUFFER;
		count = 0;
		size = file_fat_read (filename, (unsigned char *) offset, count);

		if (size == -1) {
			printf("Failed to read %s\n", filename);
			return 1;
		}

		download_size = 0;	// should be 0
		download_bytes = size;

		printf ("%ld (0x%08x) bytes read\n", size, size);
	}
	else {
		printf("Partition: %s\n", part);

		download_size = 0;	// should be 0
		download_bytes = 0;
	}

	/* Write image into partition */
	/* If file is empty or NULL, just erase the part. */
	{
		char command[32];

		if (download_bytes == 0)
			sprintf(command, "%s:%s", "erase", part);
		else
			sprintf(command, "%s:%s", "flash", part);
                  //最后还是调用fastboot的这个接口，来烧写文件。
		ret = rx_handler(command, sizeof(command));
	}

	return ret;
}

SD卡支持自动格式，分区emmc命令：

//add by xiao@2012-04-17 for: test emmc 0 format partition
#ifdef CONFIG_EMMC_INAND
//ext3format
static void format_part_ext3(int dev_num)
{
	char run_cmd[80];
	int status = 1;
    char response[65];

	sprintf(run_cmd, "ext3format mmc 0:%d",dev_num);
	status = run_command(run_cmd, 0);
    if (status)
	{
		sprintf(response,"FAILfailed to ext3format partition");
	}
	else
	{
	    //printf("partition [ %d ]  erased\n", dev_num);
		sprintf(response, "OKAY");
	}

    fastboot_tx_status(response, strlen(response), FASTBOOT_TX_ASYNC);

}
//vfat
static void format_part_dos ()
{
	char run_cmd[80];
	int status = 1;
    char response[65];
    
	sprintf(run_cmd, "fatformat mmc 0:1");
	status = run_command(run_cmd, 0);
    if (status)
	{
		sprintf(response,"FAILfailed to fatformat partition");
	}
	else
	{
		//printf("partition '%s' fatformat\n", "fat");
		sprintf(response, "OKAY");
	}

    fastboot_tx_status(response, strlen(response), FASTBOOT_TX_ASYNC);
}

//fdisk partition
int fdisk_emmc0_partition()
{
    unsigned char buffer[512];
	block_dev_desc_t *dev_desc=NULL;
	char run_cmd[80];
	int status = 1;
    char response[65];
    int ret =1;
    
    struct mmc *mmc = find_mmc_device(0);

	if (mmc_init(mmc)) {
		printf("emmc 0 init is failed.\n");
	}
    
	dev_desc = get_dev("mmc", 0);
	if (dev_desc == NULL) {
			printf ("** Invalid boot device : emmc 0 **\n");
			return ret;
	}
    //检测是否是MBR分区列表
    if ((dev_desc->block_read(dev_desc->dev, 0, 1, (ulong *) buffer) != 1) ||
	     (buffer[0x1fe] != 0x55 ||
		 buffer[0x1ff] != 0xaa)) {
		printf ("bad MBR sector! so fdisk emmc 0 now\n");

        sprintf(run_cmd, "fdisk -c 0");
	    status = run_command(run_cmd, 0);
        if (status)
    	{
    		sprintf(response,"FAILfailed to fdisk emmc 0");
    	}
    	else
    	{
    		printf("fdisk emmc 0 success! \n");
    		sprintf(response, "OKAY");
    	}  
        ret =status;
        fastboot_tx_status(response, strlen(response), FASTBOOT_TX_ASYNC);
	}
    return ret;
}
#endif