Hi All, I'm trying to setup a custom board, based on iMX6Q, to boot from eMMC 4.4.1. The board boot correctly via USB OTG, current kernel config is kernel-fslc v4.1.
So far so good I've first tried to reach the boot_info under /sys/bus/mmc/devices/mmc1\:0001 in order to set the related eMMC boot info, but the give file is not present /sys/devices/soc0/soc/2100000.aips-bus/219c000.usdhc/mmc_host/mmc1/mmc1:0001 # ls -al drwxr-xr-x 4 root root 0 Jan 27 16:43 . drwxr-xr-x 4 root root 0 Jan 27 16:43 .. drwxr-xr-x 3 root root 0 Jan 27 16:43 block -r--r--r-- 1 root root 4096 Jan 27 16:52 cid -r--r--r-- 1 root root 4096 Jan 27 16:52 csd -r--r--r-- 1 root root 4096 Jan 27 16:52 date lrwxrwxrwx 1 root root 0 Jan 27 16:52 driver -> ../../../../../../../../bus/mmc/drivers/mmcblk -r--r--r-- 1 root root 4096 Jan 27 16:52 enhanced_area_offset -r--r--r-- 1 root root 4096 Jan 27 16:52 enhanced_area_size -r--r--r-- 1 root root 4096 Jan 27 16:52 erase_size -r--r--r-- 1 root root 4096 Jan 27 16:52 ffu_capable -r--r--r-- 1 root root 4096 Jan 27 16:52 fwrev -r--r--r-- 1 root root 4096 Jan 27 16:52 hwrev -r--r--r-- 1 root root 4096 Jan 27 16:52 manfid -r--r--r-- 1 root root 4096 Jan 27 16:43 name -r--r--r-- 1 root root 4096 Jan 27 16:52 oemid drwxr-xr-x 2 root root 0 Jan 27 16:52 power -r--r--r-- 1 root root 4096 Jan 27 16:52 preferred_erase_size -r--r--r-- 1 root root 4096 Jan 27 16:52 prv -r--r--r-- 1 root root 4096 Jan 27 16:52 raw_rpmb_size_mult -r--r--r-- 1 root root 4096 Jan 27 16:52 rel_sectors -r--r--r-- 1 root root 4096 Jan 27 16:43 serial lrwxrwxrwx 1 root root 0 Jan 27 16:43 subsystem -> ../../../../../../../../bus/mmc -r--r--r-- 1 root root 4096 Jan 27 16:52 type -rw-r--r-- 1 root root 4096 Jan 27 16:43 uevent so far so good I've then tried to use the mmc commands below but the board refuses to boot likely because the PARTION_CONFIG register set to 0x48. / # mmc bootpart enable 1 1 /dev/mmcblk0 / # mmc extcsd read /dev/mmcblk0 ============================================= Extended CSD rev 1.5 (MMC 4.41) ============================================= Card Supported Command sets [S_CMD_SET: 0x01] HPI Features [HPI_FEATURE: 0x03]: implementation based on CMD12 Background operations support [BKOPS_SUPPORT: 0x01] Background operations status [BKOPS_STATUS: 0x02] 1st Initialisation Time after programmed sector [INI_TIMEOUT_AP: 0xf6] Power class for 52MHz, DDR at 3.6V [PWR_CL_DDR_52_360: 0x00] Power class for 52MHz, DDR at 1.95V [PWR_CL_DDR_52_195: 0x00] Minimum Performance for 8bit at 52MHz in DDR mode: [MIN_PERF_DDR_W_8_52: 0x00] [MIN_PERF_DDR_R_8_52: 0x00] TRIM Multiplier [TRIM_MULT: 0x06] Secure Feature support [SEC_FEATURE_SUPPORT: 0x15] Secure Erase Multiplier [SEC_ERASE_MULT: 0x02] Secure TRIM Multiplier [SEC_TRIM_MULT: 0x03] Boot Information [BOOT_INFO: 0x07] Device supports alternative boot method Device supports dual data rate during boot Device supports high speed timing during boot Boot partition size [BOOT_SIZE_MULTI: 0x10] Access size [ACC_SIZE: 0x06] High-capacity erase unit size [HC_ERASE_GRP_SIZE: 0x08] i.e. 4096 KiB High-capacity erase timeout [ERASE_TIMEOUT_MULT: 0x01] Reliable write sector count [REL_WR_SEC_C: 0x01] High-capacity W protect group size [HC_WP_GRP_SIZE: 0x02] i.e. 8192 KiB Sleep current (VCC) [S_C_VCC: 0x08] Sleep current (VCCQ) [S_C_VCCQ: 0x08] Sleep/awake timeout [S_A_TIMEOUT: 0x10] Sector Count [SEC_COUNT: 0x00ea0000] Device is block-addressed Minimum Write Performance for 8bit: [MIN_PERF_W_8_52: 0x08] [MIN_PERF_R_8_52: 0x08] [MIN_PERF_W_8_26_4_52: 0x08] [MIN_PERF_R_8_26_4_52: 0x08] Minimum Write Performance for 4bit: [MIN_PERF_W_4_26: 0x08] [MIN_PERF_R_4_26: 0x08] Power classes registers: [PWR_CL_26_360: 0x00] [PWR_CL_52_360: 0x00] [PWR_CL_26_195: 0x00] [PWR_CL_52_195: 0x00] Partition switching timing [PARTITION_SWITCH_TIME: 0x01] Out-of-interrupt busy timing [OUT_OF_INTERRUPT_TIME: 0x02] Card Type [CARD_TYPE: 0x07] HS Dual Data Rate eMMC @52MHz 1.8V or 3VI/O HS eMMC @52MHz - at rated device voltage(s) HS eMMC @26MHz - at rated device voltage(s) CSD structure version [CSD_STRUCTURE: 0x02] Command set [CMD_SET: 0x00] Command set revision [CMD_SET_REV: 0x00] Power class [POWER_CLASS: 0x00] High-speed interface timing [HS_TIMING: 0x01] Erased memory content [ERASED_MEM_CONT: 0x00] *Boot configuration bytes [PARTITION_CONFIG: 0x48]** ** Boot Partition 1 enabled** ** No access to boot partition* Boot config protection [BOOT_CONFIG_PROT: 0x00] Boot bus Conditions [BOOT_BUS_CONDITIONS: 0x16] High-density erase group definition [ERASE_GROUP_DEF: 0x00] Boot write protection status registers [BOOT_WP_STATUS]: 0x00 Boot Area Write protection [BOOT_WP]: 0x00 Power ro locking: possible Permanent ro locking: possible ro lock status: not locked User area write protection register [USER_WP]: 0x00 FW configuration [FW_CONFIG]: 0x00 RPMB Size [RPMB_SIZE_MULT]: 0x01 Write reliability setting register [WR_REL_SET]: 0x00 user area: existing data is at risk if a power failure occurs during a write operation partition 1: existing data is at risk if a power failure occurs during a write operation partition 2: existing data is at risk if a power failure occurs during a write operation partition 3: existing data is at risk if a power failure occurs during a write operation partition 4: existing data is at risk if a power failure occurs during a write operation Write reliability parameter register [WR_REL_PARAM]: 0x05 Device supports writing EXT_CSD_WR_REL_SET Device supports the enhanced def. of reliable write Enable background operations handshake [BKOPS_EN]: 0x00 H/W reset function [RST_N_FUNCTION]: 0x00 HPI management [HPI_MGMT]: 0x01 Partitioning Support [PARTITIONING_SUPPORT]: 0x03 Device support partitioning feature Device can have enhanced tech. Max Enhanced Area Size [MAX_ENH_SIZE_MULT]: 0x0001d4 i.e. 3833856 KiB Partitions attribute [PARTITIONS_ATTRIBUTE]: 0x00 Partitioning Setting [PARTITION_SETTING_COMPLETED]: 0x00 Device partition setting NOT complete General Purpose Partition Size [GP_SIZE_MULT_4]: 0x000000 [GP_SIZE_MULT_3]: 0x000000 [GP_SIZE_MULT_2]: 0x000000 [GP_SIZE_MULT_1]: 0x000000 Enhanced User Data Area Size [ENH_SIZE_MULT]: 0x000000 i.e. 0 KiB Enhanced User Data Start Address [ENH_START_ADDR]: 0x000000 i.e. 0 bytes offset Bad Block Management mode [SEC_BAD_BLK_MGMNT]: 0x00 Does anyone can suggest what to do? Thanks in advance, Roberto Fichera.
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