feat(drivers/mmc): boot partition read support
Added a public function to read blocks from a current boot partition.
switch between partitions has to respect eMMC partition switch timing.
Signed-off-by: Vyacheslav Yurkov <uvv.mail@gmail.com>
Change-Id: I55b0c910314253e5647486609583fd290dadd30a
diff --git a/include/drivers/mmc.h b/include/drivers/mmc.h
index 7611f01..834a80f 100644
--- a/include/drivers/mmc.h
+++ b/include/drivers/mmc.h
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2018, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2021, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
@@ -60,10 +60,16 @@
#define CMD_EXTCSD_PARTITION_CONFIG 179
#define CMD_EXTCSD_BUS_WIDTH 183
#define CMD_EXTCSD_HS_TIMING 185
+#define CMD_EXTCSD_PART_SWITCH_TIME 199
#define CMD_EXTCSD_SEC_CNT 212
+#define EXT_CSD_PART_CONFIG_ACC_MASK GENMASK(2, 0)
#define PART_CFG_BOOT_PARTITION1_ENABLE (U(1) << 3)
-#define PART_CFG_PARTITION1_ACCESS (U(1) << 0)
+#define PART_CFG_BOOT_PARTITION1_ACCESS (U(1) << 0)
+#define PART_CFG_BOOT_PART_EN_MASK GENMASK(5, 3)
+#define PART_CFG_BOOT_PART_EN_SHIFT 3
+#define PART_CFG_CURRENT_BOOT_PARTITION(x) (((x) & PART_CFG_BOOT_PART_EN_MASK) >> \
+ PART_CFG_BOOT_PART_EN_SHIFT)
/* Values in EXT CSD register */
#define MMC_BUS_WIDTH_1 U(0)
@@ -230,6 +236,7 @@
size_t mmc_rpmb_read_blocks(int lba, uintptr_t buf, size_t size);
size_t mmc_rpmb_write_blocks(int lba, const uintptr_t buf, size_t size);
size_t mmc_rpmb_erase_blocks(int lba, size_t size);
+size_t mmc_boot_part_read_blocks(int lba, uintptr_t buf, size_t size);
int mmc_init(const struct mmc_ops *ops_ptr, unsigned int clk,
unsigned int width, unsigned int flags,
struct mmc_device_info *device_info);