Hi Giuseppe, On Mon, Feb 20 2012, Giuseppe CAVALLARO wrote: > This patch enhances the debug information reported > for the mmc card by parsing the extended CSD registers > obviously according to all the current specifications. Thanks, this is great! I've pushed your patch. I also moved Johan's writeprotect code into its own function, so now the command set is: mmc extcsd read <device> Print extcsd data from <device>. mmc writeprotect get <device> Determine the eMMC writeprotect status of <device>. mmc writeprotect set <device> Set the eMMC writeprotect status of <device>. (And "mmc writeprotect get" shares code for parsing that section of the ext_csd with "mmc extcsd read".) I don't think I have eMMC 4.5 hardware yet either; here's output from a 4.41 device: ============================================= Extended CSD rev 1.5 (MMC 4.41) ============================================= Card Supported Command sets [S_CMD_SET: 0x01] HPI Features [HPI_FEATURE: 0x01]: implementation based on CMD13 Background operations support [BKOPS_SUPPORT: 0x00] Background operations status [BKOPS_STATUS: 0x00] 1st Initialisation Time after programmed sector [INI_TIMEOUT_AP: 0x0a] 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: 0x02] Secure Feature support [SEC_FEATURE_SUPPORT: 0x15] Secure Erase Multiplier [SEC_ERASE_MULT: 0x96] Secure TRIM Multiplier [SEC_TRIM_MULT: 0x96] 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: 0x08] Access size [ACC_SIZE: 0x06] High-capacity erase unit size [HC_ERASE_GRP_SIZE: 0x04] 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: 0x04] Sleep current (VCC) [S_C_VCC: 0x08] Sleep current (VCCQ) [S_C_VCCQ: 0x07] Sleep/awake timeout [S_A_TIMEOUT: 0x11] Sector Count [SEC_COUNT: 0x00760000] Minimum Write Performance for 8bit: [MIN_PERF_W_8_52: 0x0a] [MIN_PERF_R_8_52: 0x0a] [MIN_PERF_W_8_26_4_52: 0x0a] [MIN_PERF_R_8_26_4_52: 0x0a] Minimum Write Performance for 4bit: [MIN_PERF_W_4_26: 0x0a] [MIN_PERF_R_4_26: 0x0a] 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] 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: 0x00] Not boot enable No access to boot partition Boot config protection [BOOT_CONFIG_PROT: 0x00] Boot bus Conditions [BOOT_BUS_CONDITIONS: 0x00] 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]: 0x1f Write reliability parameter register [WR_REL_PARAM]: 0x04 Enable background operations handshake [BKOPS_EN]: 0x00 H/W reset function [RST_N_FUNCTION]: 0x00 HPI management [HPI_MGMT]: 0x00 Partitioning Support [PARTITIONING_SUPPORT]: 0x03 Device support partitioning feature Device can have enhanced tech. Max Enhanced Area Size [MAX_ENH_SIZE_MULT]: 0x0000ec Partitions attribute [PARTITIONS_ATTRIBUTE]: 0x00 Partitioning Setting [PARTITION_SETTING_COMPLETED]: 0x00 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 Enhanced User Data Start Address [ENH_START_ADDR]: 0x000000 Bad Block Management mode [SEC_BAD_BLK_MGMNT]: 0x00 -- Chris Ball <cjb@xxxxxxxxxx> <http://printf.net/> One Laptop Per Child -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
