Samsung 7420 process in UFs burn system (UFS does not exist)

Find the code flow based on the log records.

The logs are as follows:

EL3 Monitor information = built:07:10:44, APR  7
ufs:	ufs (0) UIC command error!
	00000016 00000000 00000000 00000000
	00000016 00000000 00000001 00000000
UFS0 linkstartup error!
 Retry Link Startup cnt:1

The source of each log is analyzed in detail below.

1. LOG:EL3 monitor information = built:07:10:44, APR 7

Corresponds to the following function:

File: board\uicsystem\yse7420\yse7420.c			
int board_init (void)
{
#ifndef config_sg_binary
	if (* ( unsigned int *) Config_sys_sdram_base = = 0xabcdef)
		set_asv_pmic ();
#endif
#ifdef config_ina231
	currnet_check_init ();
#endif
#ifdef CONFIG_524AD
	eep_init ();
#endif
	clk_init_root_clock_gating ();

	Display_bl1_version ();

	DISPLAY_CHIP_ID ();

	Display_pmic_info ();

	Display_tmu_info ();

	Display_boot_device_info ();

	Display_trip_info ();

	Load_secure_payload ();

	Print_el3_monitor_version ();

	Domain_power_off ();

	Gd->bd->bi_boot_params = (phys_sdram_1 + 0x100ul);

	return 0;
}

static void Print_el3_monitor_version (void)
{
	char el3_mon_ver[50] = {0,};

	if (* (unsigned int *) Config_sys_sdram_base = = 0xabcdef) {/* This booting are from
		emmc/ufs. Not T32 */
		Get_el3_m On_version (El3_mon_ver,);
		printf ("EL3 Monitor information =%s\n", el3_mon_ver);
	}
}

2. Log UFS:

Files: arch\arm\lib\board.c

There is the following code:

#if defined (CONFIG_CMD_SCSI)
	puts ("ufs:\t");
	Ufs_init (2);
	if (exynos_boot_mode () = = Boot_ufs)
		run_command ("SCSI init", 0);
#if firm_in_ufs &&  sd_firm_in 
	if (Exynos_boot_mode ()! = Boot_ufs)
		run_command ("SCSI init", 0);
#endif
#endif

The ufs_init function is called in this code, and the other functions called in the function produce additional log information, as follows

Files: drivers\block\scsi_ufs.c

	/* 1. Called
by ARCH/LIB/BOARD.C *
/int ufs_init (int mode)
{
	int res = 0, I;
#if! Sd_firm_in &&! Firm_in_ufs
	if (mode = = 2) && (Exynos_boot_mode ()! = Boot_ufs)) {
		printf ("Not UFS boot mode. Init UFS manually.\n ");
		return res;
	}
#endif for
	(i = 0; i < config_sys_scsi_max_scsi_id; i++) {
		if (!_ufs[i]) {
			_ufs[i] = malloc (sizeof (Struc T ufs_host));
			if (_ufs[i])
				memset (_ufs[i], 0x00, sizeof (struct ufs_host));
			else
				goto errout;
		}
		res = Ufs_host_init (i, _ufs[i]);
		if (res)
			goto errfree;
	}

	Ufs_identify_bootlun ();

	Scsi_scan (mode);
	return res;

 Errfree: Do
	{free
		(_ufs[i]),
	} while (i--);

 Errout:
	return res;
}

3. LOG:Retry Link Startup cnt:1

File: drivers\block\scsi_ufs.c   			
function: static int ufs_host_init (int host_index, struct ufs_host *ufs) do
{
		res = Ufs_link_startup (UFS);
		if (!res) break
			;
		rst_cnt++;
		printf ("Retry Link Startup CNT:%d\n", rst_cnt);
	} while (Rst_cnt < 3);

4, log:UFS0 linkstartup error!

File: drivers\block\scsi_ufs.c   			
function: int ufs_link_startup (struct ufs_host *ufs)
res = Send_uic_cmd (UFS);
if (res) {
		printf ("ufs%d linkstartup error!\n", ufs->host_index);
		goto out;
	}

5. LOG:UFS (0) UIC command error!

File: drivers\block\scsi_ufs.c    			
function: int send_uic_cmd (struct ufs_host *ufs)
"UFS (%d) UIC command error!\n\t%08x %08x%08x%08x\n\t%08x%08x%08x%08x\n "