Merge branch 'master' of git://git.denx.de/u-boot-arm

[karo-tx-uboot.git] / drivers / mmc / mmc.c

diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c
index e6a296a5762c939736d47aed83529f113c983635..83d2df7744465678d6f161b26d4d976251b77252 100644 (file)
--- a/drivers/mmc/mmc.c
+++ b/drivers/mmc/mmc.c
@@ -1503,3 +1503,137 @@ int mmc_initialize(bd_t *bis)
        do_preinit();
        return 0;
 }
+
+#ifdef CONFIG_SUPPORT_EMMC_BOOT
+/*
+ * This function changes the size of boot partition and the size of rpmb
+ * partition present on EMMC devices.
+ *
+ * Input Parameters:
+ * struct *mmc: pointer for the mmc device strcuture
+ * bootsize: size of boot partition
+ * rpmbsize: size of rpmb partition
+ *
+ * Returns 0 on success.
+ */
+
+int mmc_boot_partition_size_change(struct mmc *mmc, unsigned long bootsize,
+                               unsigned long rpmbsize)
+{
+       int err;
+       struct mmc_cmd cmd;
+
+       /* Only use this command for raw EMMC moviNAND. Enter backdoor mode */
+       cmd.cmdidx = MMC_CMD_RES_MAN;
+       cmd.resp_type = MMC_RSP_R1b;
+       cmd.cmdarg = MMC_CMD62_ARG1;
+
+       err = mmc_send_cmd(mmc, &cmd, NULL);
+       if (err) {
+               debug("mmc_boot_partition_size_change: Error1 = %d\n", err);
+               return err;
+       }
+
+       /* Boot partition changing mode */
+       cmd.cmdidx = MMC_CMD_RES_MAN;
+       cmd.resp_type = MMC_RSP_R1b;
+       cmd.cmdarg = MMC_CMD62_ARG2;
+
+       err = mmc_send_cmd(mmc, &cmd, NULL);
+       if (err) {
+               debug("mmc_boot_partition_size_change: Error2 = %d\n", err);
+               return err;
+       }
+       /* boot partition size is multiple of 128KB */
+       bootsize = (bootsize * 1024) / 128;
+
+       /* Arg: boot partition size */
+       cmd.cmdidx = MMC_CMD_RES_MAN;
+       cmd.resp_type = MMC_RSP_R1b;
+       cmd.cmdarg = bootsize;
+
+       err = mmc_send_cmd(mmc, &cmd, NULL);
+       if (err) {
+               debug("mmc_boot_partition_size_change: Error3 = %d\n", err);
+               return err;
+       }
+       /* RPMB partition size is multiple of 128KB */
+       rpmbsize = (rpmbsize * 1024) / 128;
+       /* Arg: RPMB partition size */
+       cmd.cmdidx = MMC_CMD_RES_MAN;
+       cmd.resp_type = MMC_RSP_R1b;
+       cmd.cmdarg = rpmbsize;
+
+       err = mmc_send_cmd(mmc, &cmd, NULL);
+       if (err) {
+               debug("mmc_boot_partition_size_change: Error4 = %d\n", err);
+               return err;
+       }
+       return 0;
+}
+
+/*
+ * This function shall form and send the commands to open / close the
+ * boot partition specified by user.
+ *
+ * Input Parameters:
+ * ack: 0x0 - No boot acknowledge sent (default)
+ *     0x1 - Boot acknowledge sent during boot operation
+ * part_num: User selects boot data that will be sent to master
+ *     0x0 - Device not boot enabled (default)
+ *     0x1 - Boot partition 1 enabled for boot
+ *     0x2 - Boot partition 2 enabled for boot
+ * access: User selects partitions to access
+ *     0x0 : No access to boot partition (default)
+ *     0x1 : R/W boot partition 1
+ *     0x2 : R/W boot partition 2
+ *     0x3 : R/W Replay Protected Memory Block (RPMB)
+ *
+ * Returns 0 on success.
+ */
+int mmc_boot_part_access(struct mmc *mmc, u8 ack, u8 part_num, u8 access)
+{
+       int err;
+       struct mmc_cmd cmd;
+
+       /* Boot ack enable, boot partition enable , boot partition access */
+       cmd.cmdidx = MMC_CMD_SWITCH;
+       cmd.resp_type = MMC_RSP_R1b;
+
+       cmd.cmdarg = (MMC_SWITCH_MODE_WRITE_BYTE << 24) |
+                       (EXT_CSD_PART_CONF << 16) |
+                       ((EXT_CSD_BOOT_ACK(ack) |
+                       EXT_CSD_BOOT_PART_NUM(part_num) |
+                       EXT_CSD_PARTITION_ACCESS(access)) << 8);
+
+       err = mmc_send_cmd(mmc, &cmd, NULL);
+       if (err) {
+               if (access) {
+                       debug("mmc boot partition#%d open fail:Error1 = %d\n",
+                             part_num, err);
+               } else {
+                       debug("mmc boot partition#%d close fail:Error = %d\n",
+                             part_num, err);
+               }
+               return err;
+       }
+
+       if (access) {
+               /* 4bit transfer mode at booting time. */
+               cmd.cmdidx = MMC_CMD_SWITCH;
+               cmd.resp_type = MMC_RSP_R1b;
+
+               cmd.cmdarg = (MMC_SWITCH_MODE_WRITE_BYTE << 24) |
+                               (EXT_CSD_BOOT_BUS_WIDTH << 16) |
+                               ((1 << 0) << 8);
+
+               err = mmc_send_cmd(mmc, &cmd, NULL);
+               if (err) {
+                       debug("mmc boot partition#%d open fail:Error2 = %d\n",
+                             part_num, err);
+                       return err;
+               }
+       }
+       return 0;
+}
+#endif