Initial support for Marvell Orion5x SoC

This patch adds support for the Marvell Orion5x SoC.
It has no use alone, and must be followed by a patch
to add Orion5x support for serial, then support for
the ED Mini V2, an Orion5x-based product from LaCie.

Signed-off-by: Albert Aribaud <albert.aribaud@free.fr>

5 files changed, 863 insertions, 0 deletions

diff --git a/arch/arm/cpu/arm926ejs/orion5x/Makefile b/arch/arm/cpu/arm926ejs/orion5x/Makefile
new file mode 100644
index 0000000000..11f4141bff
--- /dev/null
+++ b/arch/arm/cpu/arm926ejs/orion5x/Makefile
@@ -0,0 +1,55 @@
+#
+# Copyright (C) 2010 Albert ARIBAUD <albert.aribaud@free.fr>
+#
+# Based on original Kirkwood support which is
+# (C) Copyright 2009
+# Marvell Semiconductor <www.marvell.com>
+# Written-by: Prafulla Wadaskar <prafulla@marvell.com>
+#
+# See file CREDITS for list of people who contributed to this
+# project.
+#
+# 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., 51 Franklin Street, Fifth Floor, Boston,
+# MA 02110-1301 USA
+#
+
+include $(TOPDIR)/config.mk
+
+LIB	= $(obj)lib$(SOC).a
+
+COBJS-y	= cpu.o
+COBJS-y	+= dram.o
+COBJS-y	+= timer.o
+
+ifndef CONFIG_SKIP_LOWLEVEL_INIT
+SOBJS	:= lowlevel_init.o
+endif
+
+SRCS	:= $(SOBJS:.o=.S) $(COBJS-y:.o=.c)
+OBJS	:= $(addprefix $(obj),$(SOBJS) $(COBJS-y))
+
+all:	$(obj).depend $(LIB)
+
+$(LIB):	$(OBJS)
+	$(AR) $(ARFLAGS) $@ $(OBJS)
+
+#########################################################################
+
+# defines $(obj).depend target
+include $(SRCTREE)/rules.mk
+
+sinclude $(obj).depend
+
+#########################################################################
diff --git a/arch/arm/cpu/arm926ejs/orion5x/cpu.c b/arch/arm/cpu/arm926ejs/orion5x/cpu.c
new file mode 100644
index 0000000000..c2f5253b05
--- /dev/null
+++ b/arch/arm/cpu/arm926ejs/orion5x/cpu.c
@@ -0,0 +1,270 @@
+/*
+ * Copyright (C) 2010 Albert ARIBAUD <albert.aribaud@free.fr>
+ *
+ * Based on original Kirkwood support which is
+ * (C) Copyright 2009
+ * Marvell Semiconductor <www.marvell.com>
+ * Written-by: Prafulla Wadaskar <prafulla@marvell.com>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301 USA
+ */
+
+#include <common.h>
+#include <netdev.h>
+#include <asm/cache.h>
+#include <u-boot/md5.h>
+#include <asm/arch/orion5x.h>
+#include <hush.h>
+
+#define BUFLEN	16
+
+void reset_cpu(unsigned long ignored)
+{
+	struct orion5x_cpu_registers *cpureg =
+	    (struct orion5x_cpu_registers *)ORION5X_CPU_REG_BASE;
+
+	writel(readl(&cpureg->rstoutn_mask) | (1 << 2),
+		&cpureg->rstoutn_mask);
+	writel(readl(&cpureg->sys_soft_rst) | 1,
+		&cpureg->sys_soft_rst);
+	while (1)
+		;
+}
+
+/*
+ * Window Size
+ * Used with the Base register to set the address window size and location.
+ * Must be programmed from LSB to MSB as sequence of ones followed by
+ * sequence of zeros. The number of ones specifies the size of the window in
+ * 64 KByte granularity (e.g., a value of 0x00FF specifies 256 = 16 MByte).
+ * NOTE: A value of 0x0 specifies 64-KByte size.
+ */
+unsigned int orion5x_winctrl_calcsize(unsigned int sizeval)
+{
+	int i;
+	unsigned int j = 0;
+	u32 val = sizeval >> 1;
+
+	for (i = 0; val > 0x10000; i++) {
+		j |= (1 << i);
+		val = val >> 1;
+	}
+	return 0x0000ffff & j;
+}
+
+/*
+ * orion5x_config_adr_windows - Configure address Windows
+ *
+ * There are 8 address windows supported by Orion5x Soc to addess different
+ * devices. Each window can be configured for size, BAR and remap addr
+ * Below configuration is standard for most of the cases
+ *
+ * If remap function not used, remap_lo must be set as base
+ *
+ * Reference Documentation:
+ * Mbus-L to Mbus Bridge Registers Configuration.
+ * (Sec 25.1 and 25.3 of Datasheet)
+ */
+int orion5x_config_adr_windows(void)
+{
+	struct orion5x_win_registers *winregs =
+		(struct orion5x_win_registers *)ORION5X_CPU_WIN_BASE;
+
+	/* Window 0: PCIE MEM address space */
+	writel(ORION5X_CPU_WIN_CTRL_DATA(ORION5X_DEFSZ_PCIE_MEM,
+		ORION5X_TARGET_PCIE, ORION5X_ATTR_PCIE_MEM,
+		ORION5X_WIN_ENABLE), &winregs[0].ctrl);
+	writel(ORION5X_DEFADR_PCIE_MEM, &winregs[0].base);
+	writel(ORION5X_DEFADR_PCIE_MEM_REMAP_LO, &winregs[0].remap_lo);
+	writel(ORION5X_DEFADR_PCIE_MEM_REMAP_HI, &winregs[0].remap_hi);
+
+	/* Window 1: PCIE IO address space */
+	writel(ORION5X_CPU_WIN_CTRL_DATA(ORION5X_DEFSZ_PCIE_IO,
+		ORION5X_TARGET_PCIE, ORION5X_ATTR_PCIE_IO,
+		ORION5X_WIN_ENABLE), &winregs[1].ctrl);
+	writel(ORION5X_DEFADR_PCIE_IO, &winregs[1].base);
+	writel(ORION5X_DEFADR_PCIE_IO_REMAP_LO, &winregs[1].remap_lo);
+	writel(ORION5X_DEFADR_PCIE_IO_REMAP_HI, &winregs[1].remap_hi);
+
+	/* Window 2: PCI MEM address space */
+	writel(ORION5X_CPU_WIN_CTRL_DATA(ORION5X_DEFSZ_PCI_MEM,
+		ORION5X_TARGET_PCI, ORION5X_ATTR_PCI_MEM,
+		ORION5X_WIN_ENABLE), &winregs[2].ctrl);
+	writel(ORION5X_DEFADR_PCI_MEM, &winregs[2].base);
+
+	/* Window 3: PCI IO address space */
+	writel(ORION5X_CPU_WIN_CTRL_DATA(ORION5X_DEFSZ_PCI_IO,
+		ORION5X_TARGET_PCI, ORION5X_ATTR_PCI_IO,
+		ORION5X_WIN_ENABLE), &winregs[3].ctrl);
+	writel(ORION5X_DEFADR_PCI_IO, &winregs[3].base);
+
+	/* Window 4: DEV_CS0 address space */
+	writel(ORION5X_CPU_WIN_CTRL_DATA(ORION5X_DEFSZ_DEV_CS0,
+		ORION5X_TARGET_DEVICE, ORION5X_ATTR_DEV_CS0,
+		ORION5X_WIN_ENABLE), &winregs[4].ctrl);
+	writel(ORION5X_DEFADR_DEV_CS0, &winregs[4].base);
+
+	/* Window 5: DEV_CS1 address space */
+	writel(ORION5X_CPU_WIN_CTRL_DATA(ORION5X_DEFSZ_DEV_CS1,
+		ORION5X_TARGET_DEVICE, ORION5X_ATTR_DEV_CS1,
+		ORION5X_WIN_ENABLE), &winregs[5].ctrl);
+	writel(ORION5X_DEFADR_DEV_CS1, &winregs[5].base);
+
+	/* Window 6: DEV_CS2 address space */
+	writel(ORION5X_CPU_WIN_CTRL_DATA(ORION5X_DEFSZ_DEV_CS2,
+		ORION5X_TARGET_DEVICE, ORION5X_ATTR_DEV_CS2,
+		ORION5X_WIN_ENABLE), &winregs[6].ctrl);
+	writel(ORION5X_DEFADR_DEV_CS2, &winregs[6].base);
+
+	/* Window 7: BOOT Memory address space */
+	writel(ORION5X_CPU_WIN_CTRL_DATA(ORION5X_DEFSZ_BOOTROM,
+		ORION5X_TARGET_DEVICE, ORION5X_ATTR_BOOTROM,
+		ORION5X_WIN_ENABLE), &winregs[7].ctrl);
+	writel(ORION5X_DEFADR_BOOTROM, &winregs[7].base);
+
+	return 0;
+}
+
+/*
+ * Orion5x identification is done through PCIE space.
+ */
+
+u32 orion5x_device_id(void)
+{
+	return readl(PCIE_DEV_ID_OFF) >> 16;
+}
+
+u32 orion5x_device_rev(void)
+{
+	return readl(PCIE_DEV_REV_OFF) & 0xff;
+}
+
+#if defined(CONFIG_DISPLAY_CPUINFO)
+
+/* Display device and revision IDs.
+ * This function must cover all known device/revision
+ * combinations, not only the one for which u-boot is
+ * compiled; this way, one can identify actual HW in
+ * case of a mismatch.
+ */
+int print_cpuinfo(void)
+{
+	char dev_str[] = "0x0000";
+	char rev_str[] = "0x00";
+	char *dev_name = NULL;
+	char *rev_name = NULL;
+
+	u32 dev = orion5x_device_id();
+	u32 rev = orion5x_device_rev();
+
+	if (dev == MV88F5181_DEV_ID) {
+		dev_name = "MV88F5181";
+		if (rev == MV88F5181_REV_B1)
+			rev_name = "B1";
+		else if (rev == MV88F5181L_REV_A1) {
+			dev_name = "MV88F5181L";
+			rev_name = "A1";
+		} else if (rev == MV88F5181L_REV_A0) {
+			dev_name = "MV88F5181L";
+			rev_name = "A0";
+		}
+	} else if (dev == MV88F5182_DEV_ID) {
+		dev_name = "MV88F5182";
+		if (rev == MV88F5182_REV_A2)
+			rev_name = "A2";
+	} else if (dev == MV88F5281_DEV_ID) {
+		dev_name = "MV88F5281";
+		if (rev == MV88F5281_REV_D2)
+			rev_name = "D2";
+		else if (rev == MV88F5281_REV_D1)
+			rev_name = "D1";
+		else if (rev == MV88F5281_REV_D0)
+			rev_name = "D0";
+	} else if (dev == MV88F6183_DEV_ID) {
+		dev_name = "MV88F6183";
+		if (rev == MV88F6183_REV_B0)
+			rev_name = "B0";
+	}
+	if (dev_name == NULL) {
+		sprintf(dev_str, "0x%04x", dev);
+		dev_name = dev_str;
+	}
+	if (rev_name == NULL) {
+		sprintf(rev_str, "0x%02x", rev);
+		rev_name = rev_str;
+	}
+
+	printf("SoC:   Orion5x %s-%s\n", dev_name, rev_name);
+
+	return 0;
+}
+#endif /* CONFIG_DISPLAY_CPUINFO */
+
+#ifdef CONFIG_ARCH_CPU_INIT
+int arch_cpu_init(void)
+{
+	/* Enable and invalidate L2 cache in write through mode */
+	invalidate_l2_cache();
+
+	orion5x_config_adr_windows();
+
+	return 0;
+}
+#endif /* CONFIG_ARCH_CPU_INIT */
+
+/*
+ * SOC specific misc init
+ */
+#if defined(CONFIG_ARCH_MISC_INIT)
+int arch_misc_init(void)
+{
+	u32 temp;
+
+	/*CPU streaming & write allocate */
+	temp = readfr_extra_feature_reg();
+	temp &= ~(1 << 28);	/* disable wr alloc */
+	writefr_extra_feature_reg(temp);
+
+	temp = readfr_extra_feature_reg();
+	temp &= ~(1 << 29);	/* streaming disabled */
+	writefr_extra_feature_reg(temp);
+
+	/* L2Cache settings */
+	temp = readfr_extra_feature_reg();
+	/* Disable L2C pre fetch - Set bit 24 */
+	temp |= (1 << 24);
+	/* enable L2C - Set bit 22 */
+	temp |= (1 << 22);
+	writefr_extra_feature_reg(temp);
+
+	icache_enable();
+	/* Change reset vector to address 0x0 */
+	temp = get_cr();
+	set_cr(temp & ~CR_V);
+
+	/* Set CPIOs and MPPs - values provided by board
+	   include file */
+	writel(ORION5X_MPP_BASE+0x00, ORION5X_MPP0_7);
+	writel(ORION5X_MPP_BASE+0x04, ORION5X_MPP8_15);
+	writel(ORION5X_MPP_BASE+0x50, ORION5X_MPP16_23);
+	writel(ORION5X_GPIO_BASE+0x04, ORION5X_GPIO_OUT_ENABLE);
+
+	return 0;
+}
+#endif /* CONFIG_ARCH_MISC_INIT */
diff --git a/arch/arm/cpu/arm926ejs/orion5x/dram.c b/arch/arm/cpu/arm926ejs/orion5x/dram.c
new file mode 100644
index 0000000000..c719798a66
--- /dev/null
+++ b/arch/arm/cpu/arm926ejs/orion5x/dram.c
@@ -0,0 +1,64 @@
+/*
+ * Copyright (C) 2010 Albert ARIBAUD <albert.aribaud@free.fr>
+ *
+ * Based on original Kirkwood support which is
+ * (C) Copyright 2009
+ * Marvell Semiconductor <www.marvell.com>
+ * Written-by: Prafulla Wadaskar <prafulla@marvell.com>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301 USA
+ */
+
+#include <common.h>
+#include <config.h>
+#include <asm/arch/orion5x.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+/*
+ * orion5x_sdram_bar - reads SDRAM Base Address Register
+ */
+u32 orion5x_sdram_bar(enum memory_bank bank)
+{
+	struct orion5x_ddr_addr_decode_registers *winregs =
+		(struct orion5x_ddr_addr_decode_registers *)
+		ORION5X_CPU_WIN_BASE;
+
+	u32 result = 0;
+	u32 enable = 0x01 & winregs[bank].size;
+
+	if ((!enable) || (bank > BANK3))
+		return 0;
+
+	result = winregs[bank].base;
+	return result;
+}
+
+int dram_init(void)
+{
+	int i;
+
+	for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
+		gd->bd->bi_dram[i].start = orion5x_sdram_bar(i);
+		gd->bd->bi_dram[i].size = get_ram_size(
+			(volatile long *) (gd->bd->bi_dram[i].start),
+			CONFIG_MAX_RAM_BANK_SIZE);
+	}
+	return 0;
+}
diff --git a/arch/arm/cpu/arm926ejs/orion5x/lowlevel_init.S b/arch/arm/cpu/arm926ejs/orion5x/lowlevel_init.S
new file mode 100644
index 0000000000..b0e15f6e23
--- /dev/null
+++ b/arch/arm/cpu/arm926ejs/orion5x/lowlevel_init.S
@@ -0,0 +1,293 @@
+/*
+ * Copyright (C) 2010 Albert ARIBAUD <albert.aribaud@free.fr>
+ *
+ * (C) Copyright 2009
+ * Marvell Semiconductor <www.marvell.com>
+ * Written-by: Prafulla Wadaskar <prafulla@marvell.com>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301 USA
+ */
+
+#include <config.h>
+#include "asm/arch/orion5x.h"
+
+/*
+ * Configuration values for SDRAM access setup
+ */
+
+#define SDRAM_CONFIG			0x3148400
+#define SDRAM_MODE			0x62
+#define SDRAM_CONTROL			0x4041000
+#define SDRAM_TIME_CTRL_LOW		0x11602220
+#define SDRAM_TIME_CTRL_HI		0x40c
+#define SDRAM_OPEN_PAGE_EN		0x0
+/* DDR 1 2x 32M NANYA NT5DS16M16CS-6K ==> 64MB */
+#define SDRAM_BANK0_SIZE		0x3ff0001
+#define SDRAM_ADDR_CTRL			0x10
+
+#define SDRAM_OP_NOP			0x05
+#define SDRAM_OP_SETMODE		0x03
+
+#define SDRAM_PAD_CTRL_WR_EN		0x80000000
+#define SDRAM_PAD_CTRL_TUNE_EN		0x00010000
+#define SDRAM_PAD_CTRL_DRVN_MASK	0x0000003f
+#define SDRAM_PAD_CTRL_DRVP_MASK	0x00000fc0
+
+/*
+ * For Guideline MEM-3 - Drive Strength value
+ */
+
+#define DDR1_PAD_STRENGTH_DEFAULT	0x00001000
+#define SDRAM_PAD_CTRL_DRV_STR_MASK	0x00003000
+
+/*
+ * For Guideline MEM-4 - DQS Reference Delay Tuning
+ */
+
+#define MSAR_ARMDDRCLCK_MASK		0x000000f0
+#define MSAR_ARMDDRCLCK_H_MASK		0x00000100
+
+#define MSAR_ARMDDRCLCK_333_167		0x00000000
+#define MSAR_ARMDDRCLCK_500_167		0x00000030
+#define MSAR_ARMDDRCLCK_667_167		0x00000060
+#define MSAR_ARMDDRCLCK_400_200_1	0x000001E0
+#define MSAR_ARMDDRCLCK_400_200		0x00000010
+#define MSAR_ARMDDRCLCK_600_200		0x00000050
+#define MSAR_ARMDDRCLCK_800_200		0x00000070
+
+#define FTDLL_DDR1_166MHZ		0x0047F001
+
+#define FTDLL_DDR1_200MHZ		0x0044D001
+
+/*
+ * Low-level init happens right after start.S has switched to SVC32,
+ * flushed and disabled caches and disabled MMU. We're still running
+ * from the boot chip select, so the first thing we should do is set
+ * up RAM for us to relocate into.
+ */
+
+.globl lowlevel_init
+
+lowlevel_init:
+
+	/* Use 'r4 as the base for internal register accesses */
+	ldr     r4, =ORION5X_REGS_PHY_BASE
+
+	/* move internal registers from the default 0xD0000000
+	 * to their intended location, defined by SoC */
+	ldr	r3, =0xD0000000
+	add	r3, r3, #0x20000
+        str	r4, [r3, #0x80]
+
+	/* Use R3 as the base for DRAM registers */
+	add     r3, r4, #0x01000
+
+	/*DDR SDRAM Initialization Control */
+	ldr	r6, =0x00000001
+	str	r6, [r3, #0x480]
+
+	/* Use R3 as the base for PCI registers */
+	add     r3, r4, #0x31000
+
+	/* Disable arbiter */
+	ldr	r6, =0x00000030
+	str	r6, [r3, #0xd00]
+
+	/* Use R3 as the base for DRAM registers */
+	add     r3, r4, #0x01000
+
+	/* set all dram windows to 0 */
+	mov	r6, #0
+	str	r6, [r3, #0x504]
+	str	r6, [r3, #0x50C]
+	str	r6, [r3, #0x514]
+	str	r6, [r3, #0x51C]
+
+	/* 1) Configure SDRAM  */
+	ldr	r6, =SDRAM_CONFIG
+	str	r6, [r3, #0x400]
+
+	/* 2) Set SDRAM Control reg */
+	ldr	r6, =SDRAM_CONTROL
+	str	r6, [r3, #0x404]
+
+        /* 3) Write SDRAM address control register */
+	ldr	r6, =SDRAM_ADDR_CTRL
+	str	r6, [r3, #0x410]
+
+        /* 4) Write SDRAM bank 0 size register */
+	ldr	r6, =SDRAM_BANK0_SIZE
+	str	r6, [r3, #0x504]
+	/* keep other banks disabled */
+
+        /* 5) Write SDRAM open pages control register */
+	ldr	r6, =SDRAM_OPEN_PAGE_EN
+	str	r6, [r3, #0x414]
+
+        /* 6) Write SDRAM timing Low register */
+	ldr	r6, =SDRAM_TIME_CTRL_LOW
+	str	r6, [r3, #0x408]
+
+        /* 7) Write SDRAM timing High register */
+	ldr	r6, =SDRAM_TIME_CTRL_HI
+	str	r6, [r3, #0x40C]
+
+        /* 8) Write SDRAM mode register */
+        /* The CPU must not attempt to change the SDRAM Mode register setting */
+        /* prior to DRAM controller completion of the DRAM initialization     */
+        /* sequence. To guarantee this restriction, it is recommended that    */
+        /* the CPU sets the SDRAM Operation register to NOP command, performs */
+        /* read polling until the register is back in Normal operation value, */
+        /* and then sets SDRAM Mode register to its new value.                */
+
+	/* 8.1 write 'nop' to SDRAM operation */
+        ldr	r6, =SDRAM_OP_NOP
+	str	r6, [r3, #0x418]
+
+        /* 8.2 poll SDRAM operation until back in 'normal' mode.  */
+1:
+	ldr	r6, [r3, #0x418]
+	cmp	r6, #0
+	bne	1b
+
+        /* 8.3 Now its safe to write new value to SDRAM Mode register         */
+	ldr	r6, =SDRAM_MODE
+	str	r6, [r3, #0x41C]
+
+        /* 8.4 Set new mode */
+        ldr	r6, =SDRAM_OP_SETMODE
+	str	r6, [r3, #0x418]
+
+        /* 8.5 poll SDRAM operation until back in 'normal' mode.  */
+2:
+	ldr	r6, [r3, #0x418]
+	cmp	r6, #0
+	bne	2b
+
+        /* DDR SDRAM Address/Control Pads Calibration */
+	ldr	r6, [r3, #0x4C0]
+
+        /* Set Bit [31] to make the register writable                   */
+	orr	r6, r6, #SDRAM_PAD_CTRL_WR_EN
+	str	r6, [r3, #0x4C0]
+
+	bic	r6, r6, #SDRAM_PAD_CTRL_WR_EN
+	bic	r6, r6, #SDRAM_PAD_CTRL_TUNE_EN
+	bic	r6, r6, #SDRAM_PAD_CTRL_DRVN_MASK
+	bic	r6, r6, #SDRAM_PAD_CTRL_DRVP_MASK
+
+        /* Get the final N locked value of driving strength [22:17]     */
+        mov   r1, r6
+        mov   r1, r1, LSL #9
+        mov   r1, r1, LSR #26    /* r1[5:0]<DrvN>  = r3[22:17]<LockN>   */
+        orr   r1, r1, r1, LSL #6 /* r1[11:6]<DrvP> = r1[5:0]<DrvN>      */
+
+        /* Write to both <DrvN> bits [5:0] and <DrvP> bits [11:6]       */
+	orr	r6, r6, r1
+	str	r6, [r3, #0x4C0]
+
+        /* DDR SDRAM Data Pads Calibration                         	*/
+	ldr	r6, [r3, #0x4C4]
+
+        /* Set Bit [31] to make the register writable                   */
+	orr	r6, r6, #SDRAM_PAD_CTRL_WR_EN
+	str	r6, [r3, #0x4C4]
+
+	bic	r6, r6, #SDRAM_PAD_CTRL_WR_EN
+	bic	r6, r6, #SDRAM_PAD_CTRL_TUNE_EN
+	bic	r6, r6, #SDRAM_PAD_CTRL_DRVN_MASK
+	bic	r6, r6, #SDRAM_PAD_CTRL_DRVP_MASK
+
+        /* Get the final N locked value of driving strength [22:17]     */
+        mov   r1, r6
+        mov   r1, r1, LSL #9
+        mov   r1, r1, LSR #26
+        orr   r1, r1, r1, LSL #6 /* r1[5:0] = r3[22:17]<LockN>  */
+
+        /* Write to both <DrvN> bits [5:0] and <DrvP> bits [11:6]       */
+	orr	r6, r6, r1
+
+	str	r6, [r3, #0x4C4]
+
+        /* Implement Guideline (GL# MEM-3) Drive Strength Value         */
+        /* Relevant for: 88F5181-A1/B0/B1 and 88F5281-A0/B0             */
+
+        ldr     r1, =DDR1_PAD_STRENGTH_DEFAULT
+
+	/* Enable writes to DDR SDRAM Addr/Ctrl Pads Calibration register */
+	ldr	r6, [r3, #0x4C0]
+	orr	r6, r6, #SDRAM_PAD_CTRL_WR_EN
+	str	r6, [r3, #0x4C0]
+
+	/* Correct strength and disable writes again */
+	bic	r6, r6, #SDRAM_PAD_CTRL_WR_EN
+	bic	r6, r6, #SDRAM_PAD_CTRL_DRV_STR_MASK
+	orr	r6, r6, r1
+	str	r6, [r3, #0x4C0]
+
+	/* Enable writes to DDR SDRAM Data Pads Calibration register */
+	ldr	r6, [r3, #0x4C4]
+	orr	r6, r6, #SDRAM_PAD_CTRL_WR_EN
+	str	r6, [r3, #0x4C4]
+
+	/* Correct strength and disable writes again */
+	bic	r6, r6, #SDRAM_PAD_CTRL_DRV_STR_MASK
+	bic	r6, r6, #SDRAM_PAD_CTRL_WR_EN
+	orr	r6, r6, r1
+	str	r6, [r3, #0x4C4]
+
+        /* Implement Guideline (GL# MEM-4) DQS Reference Delay Tuning   */
+        /* Relevant for: 88F5181-A1/B0/B1 and 88F5281-A0/B0             */
+
+        /* Get the "sample on reset" register for the DDR frequancy     */
+	ldr	r3, =0x10000
+        ldr	r6, [r3, #0x010]
+        ldr	r1, =MSAR_ARMDDRCLCK_MASK
+        and	r1, r6, r1
+
+        ldr	r6, =FTDLL_DDR1_166MHZ
+        cmp	r1, #MSAR_ARMDDRCLCK_333_167
+        beq	3f
+        cmp	r1, #MSAR_ARMDDRCLCK_500_167
+        beq	3f
+        cmp	r1, #MSAR_ARMDDRCLCK_667_167
+        beq	3f
+
+        ldr	r6, =FTDLL_DDR1_200MHZ
+        cmp	r1, #MSAR_ARMDDRCLCK_400_200_1
+        beq	3f
+        cmp	r1, #MSAR_ARMDDRCLCK_400_200
+        beq	3f
+        cmp	r1, #MSAR_ARMDDRCLCK_600_200
+        beq	3f
+        cmp	r1, #MSAR_ARMDDRCLCK_800_200
+        beq	3f
+
+        ldr	r6, =0
+
+3:
+	/* Use R3 as the base for DRAM registers */
+	add     r3, r4, #0x01000
+
+	ldr	r2, [r3, #0x484]
+	orr	r2, r2, r6
+	str	r2, [r3, #0x484]
+
+	/* Return to U-boot via saved link register */
+	mov pc, lr
diff --git a/arch/arm/cpu/arm926ejs/orion5x/timer.c b/arch/arm/cpu/arm926ejs/orion5x/timer.c
new file mode 100644
index 0000000000..115448fa3f
--- /dev/null
+++ b/arch/arm/cpu/arm926ejs/orion5x/timer.c
@@ -0,0 +1,181 @@
+/*
+  * Copyright (C) 2010 Albert ARIBAUD <albert.aribaud@free.fr>
+ *
+ * Based on original Kirkwood support which is
+ * Copyright (C) Marvell International Ltd. and its affiliates
+ * Written-by: Prafulla Wadaskar <prafulla@marvell.com>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301 USA
+ */
+
+#include <common.h>
+#include <asm/arch/orion5x.h>
+
+#define UBOOT_CNTR	0	/* counter to use for uboot timer */
+
+/* Timer reload and current value registers */
+struct orion5x_tmr_val {
+	u32 reload;	/* Timer reload reg */
+	u32 val;	/* Timer value reg */
+};
+
+/* Timer registers */
+struct orion5x_tmr_registers {
+	u32 ctrl;	/* Timer control reg */
+	u32 pad[3];
+	struct orion5x_tmr_val tmr[2];
+	u32 wdt_reload;
+	u32 wdt_val;
+};
+
+struct orion5x_tmr_registers *orion5x_tmr_regs =
+	(struct orion5x_tmr_registers *)ORION5X_TIMER_BASE;
+
+/*
+ * ARM Timers Registers Map
+ */
+#define CNTMR_CTRL_REG			(&orion5x_tmr_regs->ctrl)
+#define CNTMR_RELOAD_REG(tmrnum)	(&orion5x_tmr_regs->tmr[tmrnum].reload)
+#define CNTMR_VAL_REG(tmrnum)		(&orion5x_tmr_regs->tmr[tmrnum].val)
+
+/*
+ * ARM Timers Control Register
+ * CPU_TIMERS_CTRL_REG (CTCR)
+ */
+#define CTCR_ARM_TIMER_EN_OFFS(cntr)	(cntr * 2)
+#define CTCR_ARM_TIMER_EN_MASK(cntr)	(1 << CTCR_ARM_TIMER_EN_OFFS)
+#define CTCR_ARM_TIMER_EN(cntr)		(1 << CTCR_ARM_TIMER_EN_OFFS(cntr))
+#define CTCR_ARM_TIMER_DIS(cntr)	(0 << CTCR_ARM_TIMER_EN_OFFS(cntr))
+
+#define CTCR_ARM_TIMER_AUTO_OFFS(cntr)	((cntr * 2) + 1)
+#define CTCR_ARM_TIMER_AUTO_MASK(cntr)	(1 << 1)
+#define CTCR_ARM_TIMER_AUTO_EN(cntr)	(1 << CTCR_ARM_TIMER_AUTO_OFFS(cntr))
+#define CTCR_ARM_TIMER_AUTO_DIS(cntr)	(0 << CTCR_ARM_TIMER_AUTO_OFFS(cntr))
+
+/*
+ * ARM Timer\Watchdog Reload Register
+ * CNTMR_RELOAD_REG (TRR)
+ */
+#define TRG_ARM_TIMER_REL_OFFS		0
+#define TRG_ARM_TIMER_REL_MASK		0xffffffff
+
+/*
+ * ARM Timer\Watchdog Register
+ * CNTMR_VAL_REG (TVRG)
+ */
+#define TVR_ARM_TIMER_OFFS		0
+#define TVR_ARM_TIMER_MASK		0xffffffff
+#define TVR_ARM_TIMER_MAX		0xffffffff
+#define TIMER_LOAD_VAL 			0xffffffff
+
+static inline ulong read_timer(void)
+{
+	return readl(CNTMR_VAL_REG(UBOOT_CNTR))
+	      / (CONFIG_SYS_TCLK / 1000);
+}
+
+static ulong timestamp;
+static ulong lastdec;
+
+void reset_timer_masked(void)
+{
+	/* reset time */
+	lastdec = read_timer();
+	timestamp = 0;
+}
+
+ulong get_timer_masked(void)
+{
+	ulong now = read_timer();
+
+	if (lastdec >= now) {
+		/* normal mode */
+		timestamp += lastdec - now;
+	} else {
+		/* we have an overflow ... */
+		timestamp += lastdec +
+			(TIMER_LOAD_VAL / (CONFIG_SYS_TCLK / 1000)) - now;
+	}
+	lastdec = now;
+
+	return timestamp;
+}
+
+void reset_timer(void)
+{
+	reset_timer_masked();
+}
+
+ulong get_timer(ulong base)
+{
+	return get_timer_masked() - base;
+}
+
+void set_timer(ulong t)
+{
+	timestamp = t;
+}
+
+static inline ulong uboot_cntr_val(void)
+{
+	return readl(CNTMR_VAL_REG(UBOOT_CNTR));
+}
+
+void __udelay(unsigned long usec)
+{
+	uint current;
+	ulong delayticks;
+
+	current = uboot_cntr_val();
+	delayticks = (usec * (CONFIG_SYS_TCLK / 1000000));
+
+	if (current < delayticks) {
+		delayticks -= current;
+		while (uboot_cntr_val() < current)
+			;
+		while ((TIMER_LOAD_VAL - delayticks) < uboot_cntr_val())
+			;
+	} else {
+		while (uboot_cntr_val() > (current - delayticks))
+			;
+	}
+}
+
+/*
+ * init the counter
+ */
+int timer_init(void)
+{
+	unsigned int cntmrctrl;
+
+	/* load value into timer */
+	writel(TIMER_LOAD_VAL, CNTMR_RELOAD_REG(UBOOT_CNTR));
+	writel(TIMER_LOAD_VAL, CNTMR_VAL_REG(UBOOT_CNTR));
+
+	/* enable timer in auto reload mode */
+	cntmrctrl = readl(CNTMR_CTRL_REG);
+	cntmrctrl |= CTCR_ARM_TIMER_EN(UBOOT_CNTR);
+	cntmrctrl |= CTCR_ARM_TIMER_AUTO_EN(UBOOT_CNTR);
+	writel(cntmrctrl, CNTMR_CTRL_REG);
+
+	/* init the timestamp and lastdec value */
+	reset_timer_masked();
+
+	return 0;
+}