mmc: MMC boot partitions support.

Allows device MMC boot partitions to be accessed. MMC partitions are
treated effectively as separate block devices on the same MMC card.

Signed-off-by: Andrei Warkentin <andreiw@motorola.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Chris Ball <cjb@laptop.org>

2 files changed, 10 insertions, 2 deletions

diff --git a/include/linux/mmc/card.h b/include/linux/mmc/card.h
index 937f852cf01e..0c7a58b14343 100644
--- a/include/linux/mmc/card.h
+++ b/include/linux/mmc/card.h
@@ -48,7 +48,8 @@ struct mmc_ext_csd {
         u8                      sec_feature_support;
         u8                      rel_sectors;
         u8                      rel_param;
-        u8                      bootconfig;
+        u8                      part_config;
+        unsigned int            part_time;              /* Units: ms */
         unsigned int            sa_timeout;             /* Units: 100ns */
         unsigned int            hs_max_dtr;
         unsigned int            sectors;
@@ -61,6 +62,7 @@ struct mmc_ext_csd {
         bool                    enhanced_area_en;       /* enable bit */
         unsigned long long      enhanced_area_offset;   /* Units: Byte */
         unsigned int            enhanced_area_size;     /* Units: KB */
+        unsigned int            boot_size;              /* in bytes */
 };
 
 struct sd_scr {
diff --git a/include/linux/mmc/mmc.h b/include/linux/mmc/mmc.h
index 390aa6eef676..373b2bf5e5b5 100644
--- a/include/linux/mmc/mmc.h
+++ b/include/linux/mmc/mmc.h
@@ -257,19 +257,21 @@ struct _mmc_csd {
 #define EXT_CSD_PARTITION_SUPPORT       160     /* RO */
 #define EXT_CSD_WR_REL_PARAM            166     /* RO */
 #define EXT_CSD_ERASE_GROUP_DEF         175     /* R/W */
-#define EXT_CSD_BOOT_CONFIG             179     /* R/W */
+#define EXT_CSD_PART_CONFIG             179     /* R/W */
 #define EXT_CSD_ERASED_MEM_CONT         181     /* RO */
 #define EXT_CSD_BUS_WIDTH               183     /* R/W */
 #define EXT_CSD_HS_TIMING               185     /* R/W */
 #define EXT_CSD_REV                     192     /* RO */
 #define EXT_CSD_STRUCTURE               194     /* RO */
 #define EXT_CSD_CARD_TYPE               196     /* RO */
+#define EXT_CSD_PART_SWITCH_TIME        199     /* RO */
 #define EXT_CSD_SEC_CNT                 212     /* RO, 4 bytes */
 #define EXT_CSD_S_A_TIMEOUT             217     /* RO */
 #define EXT_CSD_REL_WR_SEC_C            222     /* RO */
 #define EXT_CSD_HC_WP_GRP_SIZE          221     /* RO */
 #define EXT_CSD_ERASE_TIMEOUT_MULT      223     /* RO */
 #define EXT_CSD_HC_ERASE_GRP_SIZE       224     /* RO */
+#define EXT_CSD_BOOT_MULT               226     /* RO */
 #define EXT_CSD_SEC_TRIM_MULT           229     /* RO */
 #define EXT_CSD_SEC_ERASE_MULT          230     /* RO */
 #define EXT_CSD_SEC_FEATURE_SUPPORT     231     /* RO */
@@ -281,6 +283,10 @@ struct _mmc_csd {
 
 #define EXT_CSD_WR_REL_PARAM_EN         (1<<2)
 
+#define EXT_CSD_PART_CONFIG_ACC_MASK    (0x7)
+#define EXT_CSD_PART_CONFIG_ACC_BOOT0   (0x1)
+#define EXT_CSD_PART_CONFIG_ACC_BOOT1   (0x2)
+
 #define EXT_CSD_CMD_SET_NORMAL          (1<<0)
 #define EXT_CSD_CMD_SET_SECURE          (1<<1)
 #define EXT_CSD_CMD_SET_CPSECURE        (1<<2)