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 0download_bytes = size;printf ("%ld (0x%08x) bytes read\n", size, size);}else {printf("Partition: %s\n", part);download_size = 0;// should be 0download_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);elsesprintf(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//ext3formatstatic 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);}//vfatstatic 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 partitionint 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