From: Lars Pedersen <lapeddk@xxxxxxxxx>
Add bkops start functionality when BKOPS_EN[0](MANUAL_EN) is set.
---
mmc.c | 5 +++++
mmc.h | 5 +++++
mmc_cmds.c | 46 ++++++++++++++++++++++++++++++++++++++++++++++
mmc_cmds.h | 1 +
4 files changed, 57 insertions(+)
diff --git a/mmc.c b/mmc.c
index 9e02ba0..4ea1339 100644
--- a/mmc.c
+++ b/mmc.c
@@ -131,6 +131,11 @@ static struct Command commands[] = {
"NOTE! Only supported in eMMC-5.1 and MANUAL_EN(BKOPS_EN[0]) must not be set",
NULL
},
+ { do_write_bkops_start, -1,
+ "bkops start", "<device>\n"
+ "Manually start eMMC BKOPS feature on <device>.\nNOTE! BKOPS_EN[0] must be set.",
+ NULL
+ },
{ do_hwreset_en, -1,
"hwreset enable", "<device>\n"
"Permanently enable the eMMC H/W Reset feature on <device>.\nNOTE! This is a one-time programmable (unreversible) change.",
diff --git a/mmc.h b/mmc.h
index 0596d6c..a804067 100644
--- a/mmc.h
+++ b/mmc.h
@@ -80,6 +80,7 @@
#define EXT_CSD_WR_REL_SET 167
#define EXT_CSD_WR_REL_PARAM 166
#define EXT_CSD_SANITIZE_START 165
+#define EXT_CSD_BKOPS_START 164
#define EXT_CSD_BKOPS_EN 163 /* R/W */
#define EXT_CSD_RST_N_FUNCTION 162 /* R/W */
#define EXT_CSD_PARTITIONING_SUPPORT 160 /* RO */
@@ -132,6 +133,10 @@
#define BKOPS_ENABLE_AUTO_SET (1<<1) /* AUTO_EN */
#define BKOPS_ENABLE_AUTO_CLR (0) /* AUTO_EN */
+/*
+ * BKOPS_START field definition
+ */
+#define BKOPS_START (1<<0)
/*
* EXT_CSD field definitions
diff --git a/mmc_cmds.c b/mmc_cmds.c
index 05a63db..db1e98c 100644
--- a/mmc_cmds.c
+++ b/mmc_cmds.c
@@ -829,6 +829,52 @@ int do_write_bkops_auto_en(int nargs, char **argv)
return ret;
}
+int do_write_bkops_start(int nargs, char **argv)
+{
+ __u8 ext_csd[512], value = 0;
+ int fd, ret;
+ char *device;
+
+ if (nargs != 2) {
+ fprintf(stderr, "Usage: mmc bkops start </path/to/mmcblkX>\n");
+ exit(1);
+ }
+
+ device = argv[1];
+
+ 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);
+ }
+
+ if (!(ext_csd[EXT_CSD_BKOPS_SUPPORT] & 0x1)) {
+ fprintf(stderr, "%s doesn't support background operations\n", device);
+ exit(1);
+ }
+
+ if (!(ext_csd[EXT_CSD_BKOPS_EN] & 0x1)) {
+ fprintf(stderr, "%s manual starting of background operations isn't enabled\n", device);
+ exit(1);
+ }
+
+ ret = write_extcsd_value(fd, EXT_CSD_BKOPS_START, BKOPS_START);
+ if (ret) {
+ fprintf(stderr, "Could not write 0x%02x to EXT_CSD[%d] in %s\n",
+ value, EXT_CSD_BKOPS_EN, device);
+ exit(1);
+ }
+
+ return ret;
+}
+
+
int do_status_get(int nargs, char **argv)
{
__u32 response;
diff --git a/mmc_cmds.h b/mmc_cmds.h
index 7f825ae..91b7ec5 100644
--- a/mmc_cmds.h
+++ b/mmc_cmds.h
@@ -29,6 +29,7 @@ int do_write_boot_en(int nargs, char **argv);
int do_boot_bus_conditions_set(int nargs, char **argv);
int do_write_bkops_manual_en(int nargs, char **argv);
int do_write_bkops_auto_en(int nargs, char **argv);
+int do_write_bkops_start(int nargs, char **argv);
int do_hwreset_en(int nargs, char **argv);
int do_hwreset_dis(int nargs, char **argv);
int do_sanitize(int nargs, char **argv);
--
2.21.0
