mmc status get </path/to/mmcblkX>
Signed-off-by: Ben Gardiner <bengardiner@xxxxxxxxxxxxxx>
---
mmc.c | 5 +++++
mmc.h | 2 ++
mmc_cmds.c | 47 +++++++++++++++++++++++++++++++++++++++++++++++
mmc_cmds.h | 1 +
4 files changed, 55 insertions(+), 0 deletions(-)
diff --git a/mmc.c b/mmc.c
index a2de863..c22ce9e 100644
--- a/mmc.c
+++ b/mmc.c
@@ -70,6 +70,11 @@ static struct Command commands[] = {
"Set the eMMC data sector size to 4KB by disabling emulation on\n<device>.",
NULL
},
+ { do_status_get, -1,
+ "status get", "<device>\n"
+ "Print the response to STATUS_SEND (CMD13).",
+ NULL
+ },
{ do_write_boot_en, -3,
"bootpart enable", "<boot_partition> " "<send_ack> " "<device>\n"
"Enable the boot partition for the <device>.\nTo receive acknowledgment of boot from the card set <send_ack>\nto 1, else set it to 0.",
diff --git a/mmc.h b/mmc.h
index 3420d7b..3577f42 100644
--- a/mmc.h
+++ b/mmc.h
@@ -24,6 +24,8 @@
/* From kernel linux/mmc/mmc.h */
#define MMC_SWITCH 6 /* ac [31:0] See below R1b */
#define MMC_SEND_EXT_CSD 8 /* adtc R1 */
+#define MMC_SEND_STATUS 13 /* ac [31:16] RCA R1 */
+#define R1_SWITCH_ERROR (1 << 7) /* sx, c */
#define MMC_SWITCH_MODE_WRITE_BYTE 0x03 /* Set target to value */
/*
diff --git a/mmc_cmds.c b/mmc_cmds.c
index dd7498e..a2ccc1d 100644
--- a/mmc_cmds.c
+++ b/mmc_cmds.c
@@ -72,6 +72,25 @@ int write_extcsd_value(int fd, __u8 index, __u8 value)
return ret;
}
+int send_status(int fd, __u32 *response)
+{
+ int ret = 0;
+ struct mmc_ioc_cmd idata;
+
+ memset(&idata, 0, sizeof(idata));
+ idata.opcode = MMC_SEND_STATUS;
+ idata.arg = (1 << 16);
+ idata.flags = MMC_RSP_R1 | MMC_CMD_AC;
+
+ ret = ioctl(fd, MMC_IOC_CMD, &idata);
+ if (ret)
+ perror("ioctl");
+
+ *response = idata.response[0];
+
+ return ret;
+}
+
void print_writeprotect_status(__u8 *ext_csd)
{
__u8 reg;
@@ -377,6 +396,34 @@ int do_write_bkops_en(int nargs, char **argv)
return ret;
}
+int do_status_get(int nargs, char **argv)
+{
+ __u32 response;
+ int fd, ret;
+ char *device;
+
+ CHECK(nargs != 2, "Usage: mmc status get </path/to/mmcblkX>\n",
+ exit(1));
+
+ device = argv[1];
+
+ fd = open(device, O_RDWR);
+ if (fd < 0) {
+ perror("open");
+ exit(1);
+ }
+
+ ret = send_status(fd, &response);
+ if (ret) {
+ fprintf(stderr, "Could not read response to SEND_STATUS from %s\n", device);
+ exit(1);
+ }
+
+ printf("SEND_STATUS response: 0x%08x\n", response);
+
+ return ret;
+}
+
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 e52d622..3a754bf 100644
--- a/mmc_cmds.h
+++ b/mmc_cmds.h
@@ -24,3 +24,4 @@ int do_write_boot_en(int nargs, char **argv);
int do_write_bkops_en(int nargs, char **argv);
int do_hwreset_en(int nargs, char **argv);
int do_hwreset_dis(int nargs, char **argv);
+int do_status_get(int nargs, char **argv);
--
1.7.3.5
--
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