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authorTom Rini <trini@ti.com>2014-02-05 10:24:22 -0500
committerPantelis Antoniou <panto@antoniou-consulting.com>2014-02-07 18:17:49 +0200
commit5a99b9de1a845bf254292ae4730633e6ca8a29c7 (patch)
tree1affc403ef892fb8c5eafac34221d77adfccbbed /drivers
parent792970b0a344d905848fb98564ed469786af11b7 (diff)
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cmd_mmc.c: Add bootbus mmc sub-command
Add a bootbus sub-command to the mmc command to allow for setting the boot_bus_width, reset_boot_bus_width and boot_mode fields of BOOT_BUS_WIDTH (EXT_CSD[177]). Acked-by: Jaehoon Chung <jh80.chung@samsung.com> Signed-off-by: Tom Rini <trini@ti.com> Signed-off-by: Pantelis Antoniou <panto@antoniou-consulting.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/mmc/mmc.c21
1 files changed, 21 insertions, 0 deletions
diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c
index 907c418..37719d2 100644
--- a/drivers/mmc/mmc.c
+++ b/drivers/mmc/mmc.c
@@ -1507,6 +1507,27 @@ int mmc_boot_part_access(struct mmc *mmc, u8 ack, u8 part_num, u8 access)
}
/*
+ * Modify EXT_CSD[177] which is BOOT_BUS_WIDTH
+ * based on the passed in values for BOOT_BUS_WIDTH, RESET_BOOT_BUS_WIDTH
+ * and BOOT_MODE.
+ *
+ * Returns 0 on success.
+ */
+int mmc_set_boot_bus_width(struct mmc *mmc, u8 width, u8 reset, u8 mode)
+{
+ int err;
+
+ err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BOOT_BUS_WIDTH,
+ EXT_CSD_BOOT_BUS_WIDTH_MODE(mode) |
+ EXT_CSD_BOOT_BUS_WIDTH_RESET(reset) |
+ EXT_CSD_BOOT_BUS_WIDTH_WIDTH(width));
+
+ if (err)
+ return err;
+ return 0;
+}
+
+/*
* Modify EXT_CSD[179] which is PARTITION_CONFIG (formerly BOOT_CONFIG)
* based on the passed in values for BOOT_ACK, BOOT_PARTITION_ENABLE and
* PARTITION_ACCESS.