1 files changed, 99 insertions, 0 deletions
diff --git a/arch/arm/mach-aspeed/ast-sdmc.c b/arch/arm/mach-aspeed/ast-sdmc.c
new file mode 100644
index 0000000000..10f3ddb829
--- /dev/null
+++ b/arch/arm/mach-aspeed/ast-sdmc.c
@@ -0,0 +1,99 @@
+/*******************************************************************************
+ * File Name     : arch/arm/mach-aspeed/ast-sdmc.c
+ * Author        : Ryan Chen
+ * Description   : AST SDRAM Memory Ctrl
+ *
+ * Copyright (C) 2012-2020  ASPEED Technology Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+ * USA
+ *
+ *   History      :
+ *    1. 2013/03/15 Ryan Chen Create
+ *
+ ******************************************************************************/
+#include <common.h>
+#include <asm/processor.h>
+#include <asm/io.h>
+#include <asm/arch/platform.h>
+
+#include <asm/arch/regs-sdmc.h>
+#include <asm/arch/ast-sdmc.h>
+
+//#define AST_SDMC_LOCK
+
+static inline u32 ast_sdmc_read(u32 reg)
+{
+	u32 val = readl(AST_SDMC_BASE + reg);
+
+	debug("ast_sdmc_read : reg = 0x%08x, val = 0x%08x\n", reg, val);
+	return val;
+}
+
+static inline void ast_sdmc_write(u32 val, u32 reg)
+{
+	debug("ast_sdmc_write : reg = 0x%08x, val = 0x%08x\n", reg, val);
+#ifdef CONFIG_AST_SDMC_LOCK
+	//unlock
+	writel(SDMC_PROTECT_UNLOCK, AST_SDMC_BASE);
+	writel(val, AST_SDMC_BASE + reg);
+	//lock
+	writel(0xaa, AST_SDMC_BASE);
+#else
+	writel(SDMC_PROTECT_UNLOCK, AST_SDMC_BASE);
+
+	writel(val, AST_SDMC_BASE + reg);
+#endif
+}
+
+u32 ast_sdmc_get_mem_size(void)
+{
+	u32 size = 0;
+	u32 conf = ast_sdmc_read(AST_SDMC_CONFIG);
+
+	switch (SDMC_CONFIG_MEM_GET(conf)) {
+	case 0:
+		size = 64;
+		break;
+	case 1:
+		size = 128;
+		break;
+	case 2:
+		size = 256;
+		break;
+	case 3:
+		size = 512;
+		break;
+	default:
+		printf("error ddr size \n");
+		break;
+	}
+
+	if (conf & SDMC_CONFIG_VER_NEW) {
+		size <<= 1;
+	}
+
+	return size * 1024 * 1024;
+}
+
+u8 ast_sdmc_get_eec(void)
+{
+	return ast_sdmc_read(AST_SDMC_CONFIG) & SDMC_CONFIG_EEC_EN;
+}
+
+u8 ast_sdmc_get_cache(void)
+{
+	return ast_sdmc_read(AST_SDMC_CONFIG) & SDMC_CONFIG_CACHE_EN;
+}