Signed-off-by: Ben Gardiner <ben.l.gardiner@xxxxxxxxx>
---
mmc.c | 5 +++++
mmc_cmds.c | 62 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
mmc_cmds.h | 1 +
3 files changed, 68 insertions(+)
diff --git a/mmc.c b/mmc.c
index 725b842..926e92f 100644
--- a/mmc.c
+++ b/mmc.c
@@ -75,6 +75,11 @@ static struct Command commands[] = {
"Enable the enhanced user area for the <device>.\nDry-run only unless -y is passed.\nNOTE! This is a one-time programmable (unreversible) change.",
NULL
},
+ { do_write_reliability_set, -2,
+ "write_reliability set", "<-y|-n> " "<partition> " "<device>\n"
+ "Enable write reliability per partition for the <device>.\nDry-run only unless -y is passed.\nNOTE! This is a one-time programmable (unreversible) 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 7874b23..079f322 100644
--- a/mmc_cmds.c
+++ b/mmc_cmds.c
@@ -632,6 +632,68 @@ int do_enh_area_set(int nargs, char **argv)
return 0;
}
+int do_write_reliability_set(int nargs, char **argv)
+{
+ __u8 value;
+ __u8 ext_csd[512];
+ int fd, ret;
+
+ int dry_run = 1;
+ int partition;
+ char *device;
+
+ CHECK(nargs != 4, "Usage: mmc write_reliability set <-y|-n> "
+ "<partition> </path/to/mmcblkX>\n", exit(1));
+
+ if (!strcmp("-y", argv[1]))
+ dry_run = 0;
+
+ partition = strtol(argv[2], NULL, 10);
+ device = argv[3];
+
+ 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])
+ {
+ printf(" Device is already partitioned\n");
+ exit(1);
+ }
+
+ /* assert HS_CTRL_REL */
+ if (!(ext_csd[EXT_CSD_WR_REL_PARAM] & HS_CTRL_REL)) {
+ printf("Cannot set write reliability parameters, WR_REL_SET is "
+ "read-only\n");
+ exit(1);
+ }
+
+ value = ext_csd[EXT_CSD_WR_REL_SET] | (1<<partition);
+ ret = write_extcsd_value(fd, EXT_CSD_WR_REL_SET, value);
+ if (ret) {
+ fprintf(stderr, "Could not write 0x%02x to EXT_CSD[%d] in %s\n",
+ value, EXT_CSD_WR_REL_SET, device);
+ exit(1);
+ }
+
+ printf("Done setting EXT_CSD_WR_REL_SET to 0x%02x on %s\n",
+ value, device);
+
+ if (!set_partitioning_setting_completed(dry_run, device, fd))
+ exit(1);
+
+ return 0;
+}
+
int do_read_extcsd(int nargs, char **argv)
{
__u8 ext_csd[512], ext_csd_rev, reg;
diff --git a/mmc_cmds.h b/mmc_cmds.h
index fa347f5..f06cc10 100644
--- a/mmc_cmds.h
+++ b/mmc_cmds.h
@@ -27,3 +27,4 @@ int do_hwreset_dis(int nargs, char **argv);
int do_sanitize(int nargs, char **argv);
int do_status_get(int nargs, char **argv);
int do_enh_area_set(int nargs, char **argv);
+int do_write_reliability_set(int nargs, char **argv);
--
1.8.1.2
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