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

source/bootloader/u-boot-2020.01/arch/arm/mach-uniphier/sbc/sbc.c

@@ -0,0 +1,96 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2011-2015 Panasonic Corporation
+ * Copyright (C) 2015-2017 Socionext Inc.
+ *   Author: Masahiro Yamada <yamada.masahiro@socionext.com>
+ */
+
+#include <common.h>
+#include <linux/io.h>
+#include <asm/global_data.h>
+
+#include "../init.h"
+#include "sbc-regs.h"
+
+#define SBCTRL0_ADMULTIPLX_PERI_VALUE	0x33120000
+#define SBCTRL1_ADMULTIPLX_PERI_VALUE	0x03005500
+#define SBCTRL2_ADMULTIPLX_PERI_VALUE	0x14000020
+
+#define SBCTRL0_ADMULTIPLX_MEM_VALUE	0x33120000
+#define SBCTRL1_ADMULTIPLX_MEM_VALUE	0x03005500
+#define SBCTRL2_ADMULTIPLX_MEM_VALUE	0x14000010
+
+/* slower but LED works */
+#define SBCTRL0_SAVEPIN_PERI_VALUE	0x55450000
+#define SBCTRL1_SAVEPIN_PERI_VALUE	0x07168d00
+#define SBCTRL2_SAVEPIN_PERI_VALUE	0x34000009
+#define SBCTRL4_SAVEPIN_PERI_VALUE	0x02110110
+
+/* faster but LED does not work */
+#define SBCTRL0_SAVEPIN_MEM_VALUE	0x55450000
+#define SBCTRL1_SAVEPIN_MEM_VALUE	0x06057700
+/* NOR flash needs more wait counts than SRAM */
+#define SBCTRL2_SAVEPIN_MEM_VALUE	0x34000009
+#define SBCTRL4_SAVEPIN_MEM_VALUE	0x02110210
+
+int uniphier_sbc_is_enabled(void)
+{
+	DECLARE_GLOBAL_DATA_PTR;
+	const void *fdt = gd->fdt_blob;
+	int offset;
+
+	offset = fdt_node_offset_by_compatible(fdt, 0,
+					       "socionext,uniphier-system-bus");
+	if (offset < 0)
+		return 0;
+
+	return fdtdec_get_is_enabled(fdt, offset);
+}
+
+static void __uniphier_sbc_init(int savepin)
+{
+	/*
+	 * Only CS1 is connected to support card.
+	 * BKSZ[1:0] should be set to "01".
+	 */
+	if (savepin) {
+		writel(SBCTRL0_SAVEPIN_PERI_VALUE, SBCTRL10);
+		writel(SBCTRL1_SAVEPIN_PERI_VALUE, SBCTRL11);
+		writel(SBCTRL2_SAVEPIN_PERI_VALUE, SBCTRL12);
+		writel(SBCTRL4_SAVEPIN_PERI_VALUE, SBCTRL14);
+	} else {
+		writel(SBCTRL0_ADMULTIPLX_MEM_VALUE, SBCTRL10);
+		writel(SBCTRL1_ADMULTIPLX_MEM_VALUE, SBCTRL11);
+		writel(SBCTRL2_ADMULTIPLX_MEM_VALUE, SBCTRL12);
+	}
+
+	if (uniphier_sbc_boot_is_swapped()) {
+		/*
+		 * Boot Swap On: boot from external NOR/SRAM
+		 * 0x42000000-0x43ffffff is a mirror of 0x40000000-0x41ffffff.
+		 *
+		 * 0x40000000-0x41efffff, 0x42000000-0x43efffff: memory bank
+		 * 0x41f00000-0x41ffffff, 0x43f00000-0x43ffffff: peripherals
+		 */
+		writel(0x0000bc01, SBBASE0);
+	} else {
+		/*
+		 * Boot Swap Off: boot from mask ROM
+		 * 0x40000000-0x41ffffff: mask ROM
+		 * 0x42000000-0x43efffff: memory bank (31MB)
+		 * 0x43f00000-0x43ffffff: peripherals (1MB)
+		 */
+		writel(0x0000be01, SBBASE0); /* dummy */
+		writel(0x0200be01, SBBASE1);
+	}
+}
+
+void uniphier_sbc_init_admulti(void)
+{
+	__uniphier_sbc_init(0);
+}
+
+void uniphier_sbc_init_savepin(void)
+{
+	__uniphier_sbc_init(1);
+}