emmc: support CMD23
Support CMD23. When CMD23 is used, CMD12 could be avoided.
Two scenarios:
1. CMD17 for single block, CMD18 + CMD12 for multiple blocks.
2. CMD23 + CMD18 for both single block and multiple blocks.
The emmc_init() should initialize whether CMD23 is supported
or not.
Signed-off-by: Haojian Zhuang <haojian.zhuang@linaro.org>
diff --git a/include/drivers/emmc.h b/include/drivers/emmc.h
index 61d4495..5f78dce 100644
--- a/include/drivers/emmc.h
+++ b/include/drivers/emmc.h
@@ -49,6 +49,7 @@
#define EMMC_CMD13 13
#define EMMC_CMD17 17
#define EMMC_CMD18 18
+#define EMMC_CMD23 23
#define EMMC_CMD24 24
#define EMMC_CMD25 25
#define EMMC_CMD35 35
@@ -111,6 +112,8 @@
#define EMMC_STATE_BTST 9
#define EMMC_STATE_SLP 10
+#define EMMC_FLAG_CMD23 (1 << 0)
+
typedef struct emmc_cmd {
unsigned int cmd_idx;
unsigned int cmd_arg;
@@ -177,6 +180,7 @@
size_t emmc_rpmb_read_blocks(int lba, uintptr_t buf, size_t size);
size_t emmc_rpmb_write_blocks(int lba, const uintptr_t buf, size_t size);
size_t emmc_rpmb_erase_blocks(int lba, size_t size);
-void emmc_init(const emmc_ops_t *ops, int clk, int bus_width);
+void emmc_init(const emmc_ops_t *ops, int clk, int bus_width,
+ unsigned int flags);
#endif /* __EMMC_H__ */