1 files changed, 118 insertions, 0 deletions
diff --git a/roms/u-boot/board/micronas/vct/ebi_nor_flash.c b/roms/u-boot/board/micronas/vct/ebi_nor_flash.c
new file mode 100644
index 00000000..80fbc847
--- /dev/null
+++ b/roms/u-boot/board/micronas/vct/ebi_nor_flash.c
@@ -0,0 +1,118 @@
+/*
+ * (C) Copyright 2008 Stefan Roese <sr@denx.de>, DENX Software Engineering
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include "vct.h"
+
+static u32 ebi_read(u32 addr)
+{
+	addr &= ~0xFC000000;
+
+	reg_write(EBI_CPU_IO_ACCS(EBI_BASE), EXT_DEVICE_CHANNEL_2 | addr);
+	ebi_wait();
+
+	return reg_read(EBI_IO_ACCS_DATA(EBI_BASE));
+}
+
+static int ebi_write_u16(u32 addr, u32 data, int fetchIO)
+{
+	u32 val = (data << 16);
+
+	addr &= ~0xFC000000;
+
+	ebi_wait();
+
+	reg_write(EBI_IO_ACCS_DATA(EBI_BASE), val);
+	reg_write(EBI_CPU_IO_ACCS(EBI_BASE),
+		  EXT_DEVICE_CHANNEL_2 | EBI_CPU_WRITE | addr);
+	ebi_wait();
+
+	if (fetchIO) {
+		u32 counter = 0;
+		while (!(reg_read(EBI_SIG_LEVEL(EBI_BASE)) & EXT_CPU_IORDY_SL)) {
+			if (counter++ > 0xFFFFFF)
+				return 1;
+		}
+	}
+
+	return 0;
+}
+
+static u16 ebi_read_u16(u32 addr)
+{
+	return ((ebi_read(addr) >> 16) & 0xFFFF);
+}
+
+static u8 ebi_read_u8(u32 addr)
+{
+	u32 val = ebi_read(addr) >> 16;
+
+	if (addr & 0x1)
+		return val & 0xff;
+	else
+		return (val >> 8) & 0xff;
+}
+
+/*
+ * EBI initialization for NOR FLASH access
+ */
+int ebi_init_nor_flash(void)
+{
+	reg_write(EBI_DEV1_CONFIG1(EBI_BASE), 0x83000);
+
+	reg_write(EBI_DEV2_CONFIG1(EBI_BASE), 0x400002);
+	reg_write(EBI_DEV2_CONFIG2(EBI_BASE), 0x50);
+
+	reg_write(EBI_DEV2_TIM1_RD1(EBI_BASE), 0x409113);
+	reg_write(EBI_DEV2_TIM1_RD2(EBI_BASE), 0xFF01000);
+	reg_write(EBI_DEV2_TIM1_WR1(EBI_BASE), 0x04003113);
+	reg_write(EBI_DEV2_TIM1_WR2(EBI_BASE), 0x3FC12011);
+	reg_write(EBI_DEV2_TIM_EXT(EBI_BASE), 0xFFF00000);
+
+	return 0;
+}
+
+/*
+ * Accessor functions replacing the "weak" functions in
+ * drivers/mtd/cfi_flash.c
+ */
+void flash_write8(u8 value, void *addr)
+{
+	ebi_write_u16((u32)addr, value, 0);
+}
+
+void flash_write16(u16 value, void *addr)
+{
+	ebi_write_u16((u32)addr, value, 0);
+}
+
+u8 flash_read8(void *addr)
+{
+	return ebi_read_u8((u32)addr);
+}
+
+u16 flash_read16(void *addr)
+{
+	return ebi_read_u16((u32)addr);
+}
+
+u32 flash_read32(void *addr)
+{
+	return ((u32)ebi_read_u16((u32)addr) << 16) |
+		ebi_read_u16((u32)addr + 2);
+}
+
+void *board_flash_read_memcpy(void *dest, const void *src, size_t count)
+{
+	u16 *tmp = (u16 *)dest, *s = (u16 *)src;
+	int i;
+
+	for (i = 0; i < count; i += 2)
+		*tmp++ = flash_read16(s++);
+
+	return dest;
+}