GK SDK 源码库: XMIPCLinuxV100R005C00SPC030 (kernel/tools/open_source excluded)

source/bootloader/u-boot-2020.01/arch/arm/mach-imx/ddrmc-vf610-calibration.h

@@ -0,0 +1,45 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * ddrmc DDR3 calibration code for NXP's VF610
+ *
+ * Copyright (C) 2018 DENX Software Engineering
+ * Lukasz Majewski, DENX Software Engineering, lukma@denx.de
+ *
+ */
+
+#ifndef __DDRMC_VF610_CALIBRATOIN_H_
+#define __DDRMC_VF610_CALIBRATOIN_H_
+
+/*
+ * Number of "samples" in the calibration bitmap
+ * to be considered during calibration.
+ */
+#define N_SAMPLES 3
+
+/*
+ * Constants to indicate if we are looking for a rising or
+ * falling edge in the calibration bitmap
+ */
+enum edge {
+	FALLING_EDGE = 1,
+	RISING_EDGE
+};
+
+/*
+ * The max number of delay elements when DQS to DQ setting
+ */
+#define DDRMC_DQS_DQ_MAX_DELAY 0xFF
+
+/**
+ * ddrmc_calibration - Vybrid's (VF610) DDR3 calibration code
+ *
+ * This function is calculating proper memory controller values
+ * during run time.
+ *
+ * @param ddrmr_regs - memory controller registers
+ *
+ * @return 0 on success, otherwise error code
+ */
+int ddrmc_calibration(struct ddrmr_regs *ddrmr);
+
+#endif /* __DDRMC_VF610_CALIBRATOIN_H_ */