improve the parsing of the EXT_CSD registers
This patch enhances the debug information reported
for the mmc card by parsing the extended CSD registers
obviously according to all the current specifications.
I have no HW to test eMMC 4.5 at this moment. In any case,
the patch supports JEDEC Standard No. 84-B45.
No issues on JESD84-A441 and older specs raised on my side.
This patch indeed want to start providing a full parsing
of the all EXT_CSD registers in the following layout:
Name [FIELD: <value>]
Voluntarily, I added the FIELD because it can actually help on
searching though the SPEC in case of doubts.
In fact, in this stage, not all the register bits are yet parsed.
Currently this has been done for a small subset of registers
(e.g. 173, 160 ...) where IMO it's quite useful for an end-user
to get some details. I do hope this will be improved in the near
feature (also for write operations).
P.S. The original patch posted time ago for the Kernel has been
reviewed-by Sebastian Rasmussen, acked-by: Linus Walleij and reported
by Youssef Tiki.
Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
diff --git a/mmc.h b/mmc.h
index 8540f3d..3af36f1 100644
--- a/mmc.h
+++ b/mmc.h
@@ -29,17 +29,29 @@
/*
* EXT_CSD fields
*/
-#define EXT_CSD_BOOT_WP 173 /* R/W */
-#define EXT_CSD_PART_SWITCH_TIME 199 /* RO */
+#define EXT_CSD_S_CMD_SET 504
+#define EXT_CSD_HPI_FEATURE 503
+#define EXT_CSD_BOOT_INFO 228 /* R/W */
+#define EXT_CSD_PART_SWITCH_TIME 199
+#define EXT_CSD_BOOT_CFG 179
+#define EXT_CSD_BOOT_WP 173
/*
* EXT_CSD field definitions
*/
+#define EXT_CSD_HPI_SUPP (1<<0)
+#define EXT_CSD_HPI_IMPL (1<<1)
#define EXT_CSD_CMD_SET_NORMAL (1<<0)
#define EXT_CSD_BOOT_WP_B_PWR_WP_DIS (0x40)
#define EXT_CSD_BOOT_WP_B_PERM_WP_DIS (0x10)
#define EXT_CSD_BOOT_WP_B_PERM_WP_EN (0x04)
#define EXT_CSD_BOOT_WP_B_PWR_WP_EN (0x01)
+#define EXT_CSD_BOOT_INFO_HS_MODE (1<<2)
+#define EXT_CSD_BOOT_INFO_DDR_DDR (1<<1)
+#define EXT_CSD_BOOT_INFO_ALT (1<<0)
+#define EXT_CSD_BOOT_CFG_ACK (1<<6)
+#define EXT_CSD_BOOT_CFG_EN (0x38)
+#define EXT_CSD_BOOT_CFG_ACC (0x03)
/* From kernel linux/mmc/core.h */
#define MMC_RSP_PRESENT (1 << 0)