linux-kernel - [PATCH 3/7] mmc-utils: interpret DEVICE

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Date:   Tue,  9 Oct 2018 13:31:07 -0400
From:   James Nuss <jamesnuss@...ometrics.ca>
To:     linux-mmc@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org
Subject: [PATCH 3/7] mmc-utils: interpret DEVICE_VERSION when printing extcsd

The DEVICE_VERSION is a 2-byte field

Print the individual byte values in hex

Signed-off-by: James Nuss <jamesnuss@...ometrics.ca>
---
 mmc.h      | 2 ++
 mmc_cmds.c | 3 +++
 2 files changed, 5 insertions(+)

diff --git a/mmc.h b/mmc.h
index 86e209a..f25869e 100644
--- a/mmc.h
+++ b/mmc.h
@@ -59,6 +59,8 @@
 #define EXT_CSD_OPTIMAL_READ_SIZE	266	/* RO */
 #define EXT_CSD_OPTIMAL_WRITE_SIZE	265	/* RO */
 #define EXT_CSD_OPTIMAL_TRIM_UNIT_SIZE	264	/* RO */
+#define EXT_CSD_DEVICE_VERSION_1	263	/* RO */
+#define EXT_CSD_DEVICE_VERSION_0	262	/* RO */
 #define EXT_CSD_FIRMWARE_VERSION_7	261	/* RO */
 #define EXT_CSD_FIRMWARE_VERSION_6	260	/* RO */
 #define EXT_CSD_FIRMWARE_VERSION_5	259	/* RO */
diff --git a/mmc_cmds.c b/mmc_cmds.c
index 45aa4c0..756aa2f 100644
--- a/mmc_cmds.c
+++ b/mmc_cmds.c
@@ -1758,6 +1758,9 @@ int do_read_extcsd(int nargs, char **argv)
 	}
 
 	if (ext_csd_rev >= 7) {
+		printf("Device Version: 0x%02x%02x\n",
+			ext_csd[EXT_CSD_DEVICE_VERSION_1],
+			ext_csd[EXT_CSD_DEVICE_VERSION_0]);
 		printf("Firmware Version: 0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
 			ext_csd[EXT_CSD_FIRMWARE_VERSION_7],
 			ext_csd[EXT_CSD_FIRMWARE_VERSION_6],
-- 
2.7.4


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