Display secure removal type when printing Extended CSD
Example:
# mmc extcsd read /dev/mmcblk0
...
Secure Removal Type [SECURE_REMOVAL_TYPE]: 0x39
information is configured to be removed using a vendor defined
Supported Secure Removal Type:
information removed by an erase of the physical memory
information removed using a vendor defined
Signed-off-by: Jungseung Lee <js07.lee@xxxxxxxxxxx>
---
mmc.h | 3 +++
mmc_cmds.c | 32 ++++++++++++++++++++++++++++++++
2 files changed, 35 insertions(+)
diff --git a/mmc.h b/mmc.h
index 285c1f1..648fb26 100644
--- a/mmc.h
+++ b/mmc.h
@@ -116,6 +116,7 @@
#define EXT_CSD_MODE_CONFIG 30
#define EXT_CSD_MODE_OPERATION_CODES 29 /* W */
#define EXT_CSD_FFU_STATUS 26 /* R */
+#define EXT_CSD_SECURE_REMOVAL_TYPE 16 /* R/W */
#define EXT_CSD_CMDQ_MODE_EN 15 /* R/W */
/*
@@ -132,6 +133,8 @@
/*
* EXT_CSD field definitions
*/
+#define EXT_CSD_CONFIG_SECRM_TYPE (0x30)
+#define EXT_CSD_SUPPORTED_SECRM_TYPE (0x0f)
#define EXT_CSD_FFU_INSTALL (0x01)
#define EXT_CSD_FFU_MODE (0x01)
#define EXT_CSD_NORMAL_MODE (0x00)
diff --git a/mmc_cmds.c b/mmc_cmds.c
index 19a9da1..fb37189 100644
--- a/mmc_cmds.c
+++ b/mmc_cmds.c
@@ -1766,6 +1766,38 @@ int do_read_extcsd(int nargs, char **argv)
ext_csd[EXT_CSD_DEVICE_LIFE_TIME_EST_TYP_B]);
printf("eMMC Pre EOL information [EXT_CSD_PRE_EOL_INFO]: 0x%02x\n",
ext_csd[EXT_CSD_PRE_EOL_INFO]);
+ reg = ext_csd[EXT_CSD_SECURE_REMOVAL_TYPE];
+ printf("Secure Removal Type [SECURE_REMOVAL_TYPE]: 0x%02x\n", reg);
+ printf(" information is configured to be removed ");
+ /* Bit [5:4]: Configure Secure Removal Type */
+ switch ((reg & EXT_CSD_CONFIG_SECRM_TYPE) >> 4) {
+ case 0x0:
+ printf("by an erase of the physical memory\n");
+ break;
+ case 0x1:
+ printf("by an overwriting the addressed locations"
+ " with a character followed by an erase\n");
+ break;
+ case 0x2:
+ printf("by an overwriting the addressed locations"
+ " with a character, its complement, then a random character\n");
+ break;
+ case 0x3:
+ printf("using a vendor defined\n");
+ break;
+ }
+ /* Bit [3:0]: Supported Secure Removal Type */
+ printf(" Supported Secure Removal Type:\n");
+ if (reg & 0x01)
+ printf(" information removed by an erase of the physical memory\n");
+ if (reg & 0x02)
+ printf(" information removed by an overwriting the addressed locations"
+ " with a character followed by an erase\n");
+ if (reg & 0x04)
+ printf(" information removed by an overwriting the addressed locations"
+ " with a character, its complement, then a random character\n");
+ if (reg & 0x08)
+ printf(" information removed using a vendor defined\n");
}
if (ext_csd_rev >= 8) {
--
2.17.1
