"write-reliability" setting must be performed on all required partitions
in one command.
Introduce new command "write_reliability set_register" to allow setting
of write-reliability for all required partitions.
This command is a one-time programmable action. It cannot not be undone
by power-cycling the unit.
Signed-off-by: James Nuss <jamesnuss@xxxxxxxxxxxxxx>
---
mmc.c | 9 +++++++++
mmc_cmds.c | 59 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
mmc_cmds.h | 1 +
3 files changed, 69 insertions(+)
diff --git a/mmc.c b/mmc.c
index 50c9c9e..aaefd3d 100644
--- a/mmc.c
+++ b/mmc.c
@@ -102,6 +102,15 @@ static struct Command commands[] = {
"Enable write reliability per partition for the <device>.\nDry-run only unless -y or -c is passed.\nUse -c if more partitioning settings are still to come.\nNOTE! This is a one-time programmable (unreversible) change.",
NULL
},
+ { do_write_reliability_set_register, -2,
+ "write_reliability set_register", "<partition-mask> " "<device>\n"
+ "Set the write-reliability register (WR_REL_SET) for the <device>.\n"
+ "User area=bit0, GP1=bit1, GP2=bit2, GP3=bit3, GP4=bit4\n"
+ "e.g setting register to 0x03 will set 'User Area' and 'GP1' partitions \n"
+ "with write-reliability, and all others without write-reliability.\n"
+ "NOTE! This is a one-time programmable (irreversible) change.",
+ NULL
+ },
{ do_status_get, -1,
"status get", "<device>\n"
"Print the response to STATUS_SEND (CMD13).",
diff --git a/mmc_cmds.c b/mmc_cmds.c
index 756aa2f..68c73ef 100644
--- a/mmc_cmds.c
+++ b/mmc_cmds.c
@@ -1244,6 +1244,65 @@ int do_enh_area_set(int nargs, char **argv)
return 0;
}
+int do_write_reliability_set_register(int nargs, char **argv)
+{
+ __u8 ext_csd[512];
+ int fd, ret;
+ long partition_mask;
+ char *device;
+ char *endptr;
+
+ if (nargs != 3) {
+ fprintf(stderr,"Usage: mmc write_reliability set_register <partition-mask> </path/to/mmcblkX>\n");
+ exit(1);
+ }
+
+ errno = 0;
+ partition_mask = strtol(argv[1], &endptr, 0);
+ if (errno != 0 || endptr == argv[1] || *endptr != 0 || partition_mask < 0 || partition_mask > 0x1f) {
+ fprintf(stderr, "Partition mask invalid: %s\n", argv[1]);
+ exit(1);
+ }
+
+ device = argv[2];
+ fd = open(device, O_RDWR);
+ if (fd < 0) {
+ perror("open");
+ exit(1);
+ }
+
+ ret = read_extcsd(fd, ext_csd);
+ if (ret) {
+ fprintf(stderr, "Could not read EXT_CSD from %s\n", device);
+ exit(1);
+ }
+
+ /* assert not PARTITION_SETTING_COMPLETED */
+ if (ext_csd[EXT_CSD_PARTITION_SETTING_COMPLETED])
+ {
+ fprintf(stderr, "Device is already partitioned\n");
+ exit(1);
+ }
+
+ /* assert HS_CTRL_REL */
+ if (!(ext_csd[EXT_CSD_WR_REL_PARAM] & HS_CTRL_REL)) {
+ fprintf(stderr, "Cannot set write reliability parameters, WR_REL_SET is "
+ "read-only\n");
+ exit(1);
+ }
+
+ ret = write_extcsd_value(fd, EXT_CSD_WR_REL_SET, (__u8)partition_mask);
+ if (ret) {
+ fprintf(stderr, "Could not write 0x%02x to EXT_CSD[%d] in %s\n",
+ (__u8)partition_mask, EXT_CSD_WR_REL_SET, device);
+ exit(1);
+ }
+ fprintf(stderr, "Done setting EXT_CSD_WR_REL_SET to 0x%02x on %s\n",
+ (__u8)partition_mask, device);
+
+ return 0;
+}
+
int do_write_reliability_set(int nargs, char **argv)
{
__u8 value;
diff --git a/mmc_cmds.h b/mmc_cmds.h
index 9d3246c..8ca9ac9 100644
--- a/mmc_cmds.h
+++ b/mmc_cmds.h
@@ -35,6 +35,7 @@ int do_status_get(int nargs, char **argv);
int do_create_gp_partition(int nargs, char **argv);
int do_enh_area_set(int nargs, char **argv);
int do_write_reliability_set(int nargs, char **argv);
+int do_write_reliability_set_register(int nargs, char **argv);
int do_rpmb_write_key(int nargs, char **argv);
int do_rpmb_read_counter(int nargs, char **argv);
int do_rpmb_read_block(int nargs, char **argv);
--
2.7.4
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