ARM: Add support for EP93xx SoCs

Add support for the Cirrus EP93xx platform

Signed-off-by: Matthias Kaehlcke <matthias@kaehlcke.net>
Acked-by: Tom <Tom.Rix@windriver.com>

9 files changed, 1207 insertions, 1 deletions

diff --git a/cpu/arm920t/ep93xx/Makefile b/cpu/arm920t/ep93xx/Makefile
new file mode 100644
index 0000000..30e12af
--- /dev/null
+++ b/cpu/arm920t/ep93xx/Makefile
@@ -0,0 +1,56 @@
+#
+# Cirrus Logic EP93xx CPU-specific Makefile
+#
+# Copyright (C) 2009 Matthias Kaehlcke <matthias@kaehlcke.net>
+#
+# Copyright (C) 2004, 2005
+# Cory T. Tusar, Videon Central, Inc., <ctusar@videon-central.com>
+#
+# Copyright (C) 2006
+# Dominic Rath <Dominic.Rath@gmx.de>
+#
+# Based on an original Makefile, which is
+#
+# (C) Copyright 2000, 2001, 2002
+# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+#
+# 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.,
+# 675 Mass Ave, Cambridge, MA 02139, USA.
+#
+include $(TOPDIR)/config.mk
+
+LIB = $(obj)lib$(SOC).a
+
+COBJS   = cpu.o led.o speed.o timer.o
+SOBJS   = lowlevel_init.o
+
+SRCS    := $(SOBJS:.o=.S) $(COBJS:.o=.c)
+OBJS    := $(addprefix $(obj),$(SOBJS) $(COBJS))
+
+all:    $(obj).depend $(LIB)
+
+$(LIB): $(OBJS)
+	$(AR) $(ARFLAGS) $@ $(OBJS)
+
+#########################################################################
+
+# defines $(obj).depend target
+include $(SRCTREE)/rules.mk
+
+sinclude $(obj).depend
+
+#########################################################################
+
diff --git a/cpu/arm920t/ep93xx/cpu.c b/cpu/arm920t/ep93xx/cpu.c
new file mode 100644
index 0000000..1abb9c6
--- /dev/null
+++ b/cpu/arm920t/ep93xx/cpu.c
@@ -0,0 +1,51 @@
+/*
+ * Cirrus Logic EP93xx CPU-specific support.
+ *
+ * Copyright (C) 2009 Matthias Kaehlcke <matthias@kaehlcke.net>
+ *
+ * Copyright (C) 2004, 2005
+ * Cory T. Tusar, Videon Central, Inc., <ctusar@videon-central.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.,
+ * 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <common.h>
+#include <asm/arch/ep93xx.h>
+#include <asm/io.h>
+
+/* We reset the CPU by generating a 1-->0 transition on DeviceCfg bit 31. */
+extern void reset_cpu(ulong addr)
+{
+	struct syscon_regs *syscon = (struct syscon_regs *)SYSCON_BASE;
+	uint32_t value;
+
+	/* Unlock DeviceCfg and set SWRST */
+	writel(0xAA, &syscon->sysswlock);
+	value = readl(&syscon->devicecfg);
+	value |= SYSCON_DEVICECFG_SWRST;
+	writel(value, &syscon->devicecfg);
+
+	/* Unlock DeviceCfg and clear SWRST */
+	writel(0xAA, &syscon->sysswlock);
+	value = readl(&syscon->devicecfg);
+	value &= ~SYSCON_DEVICECFG_SWRST;
+	writel(value, &syscon->devicecfg);
+
+	/* Dying... */
+	while (1)
+		; /* noop */
+}
diff --git a/cpu/arm920t/ep93xx/led.c b/cpu/arm920t/ep93xx/led.c
new file mode 100644
index 0000000..7e2c897
--- /dev/null
+++ b/cpu/arm920t/ep93xx/led.c
@@ -0,0 +1,101 @@
+/*
+ * Copyright (C) 2010, 2009 Matthias Kaehlcke <matthias@kaehlcke.net>
+ *
+ * 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., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <asm/io.h>
+#include <asm/arch/ep93xx.h>
+#include <config.h>
+#include <status_led.h>
+
+static uint8_t saved_state[2] = {STATUS_LED_OFF, STATUS_LED_OFF};
+static uint32_t gpio_pin[2] = {1 << STATUS_LED_GREEN,
+			       1 << STATUS_LED_RED};
+
+inline void switch_LED_on(uint8_t led)
+{
+	register struct gpio_regs *gpio = (struct gpio_regs *)GPIO_BASE;
+
+	writel(readl(&gpio->pedr) | gpio_pin[led], &gpio->pedr);
+	saved_state[led] = STATUS_LED_ON;
+}
+
+inline void switch_LED_off(uint8_t led)
+{
+	register struct gpio_regs *gpio = (struct gpio_regs *)GPIO_BASE;
+
+	writel(readl(&gpio->pedr) & ~gpio_pin[led], &gpio->pedr);
+	saved_state[led] = STATUS_LED_OFF;
+}
+
+void red_LED_on(void)
+{
+	switch_LED_on(STATUS_LED_RED);
+}
+
+void red_LED_off(void)
+{
+	switch_LED_off(STATUS_LED_RED);
+}
+
+void green_LED_on(void)
+{
+	switch_LED_on(STATUS_LED_GREEN);
+}
+
+void green_LED_off(void)
+{
+	switch_LED_off(STATUS_LED_GREEN);
+}
+
+void __led_init(led_id_t mask, int state)
+{
+	__led_set(mask, state);
+}
+
+void __led_toggle(led_id_t mask)
+{
+	if (STATUS_LED_RED == mask) {
+		if (STATUS_LED_ON == saved_state[STATUS_LED_RED])
+			red_LED_off();
+		else
+			red_LED_on();
+	} else if (STATUS_LED_GREEN == mask) {
+		if (STATUS_LED_ON == saved_state[STATUS_LED_GREEN])
+			green_LED_off();
+		else
+			green_LED_on();
+	}
+}
+
+void __led_set(led_id_t mask, int state)
+{
+	if (STATUS_LED_RED == mask) {
+		if (STATUS_LED_ON == state)
+			red_LED_on();
+		else
+			red_LED_off();
+	} else if (STATUS_LED_GREEN == mask) {
+		if (STATUS_LED_ON == state)
+			green_LED_on();
+		else
+			green_LED_off();
+	}
+}
diff --git a/cpu/arm920t/ep93xx/lowlevel_init.S b/cpu/arm920t/ep93xx/lowlevel_init.S
new file mode 100644
index 0000000..a20ec89
--- /dev/null
+++ b/cpu/arm920t/ep93xx/lowlevel_init.S
@@ -0,0 +1,65 @@
+/*
+ * Low-level initialization for EP93xx
+ *
+ * Copyright (C) 2009 Matthias Kaehlcke <matthias@kaehlcke.net>
+ *
+ * Copyright (C) 2006 Dominic Rath <Dominic.Rath@gmx.de>
+ *
+ * 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., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <version.h>
+#include <asm/arch/ep93xx.h>
+
+.globl lowlevel_init
+lowlevel_init:
+	/* backup return address */
+	ldr r1, =SYSCON_SCRATCH0
+	str lr, [r1]
+
+	/* Turn on both LEDs */
+	bl red_LED_on
+	bl green_LED_on
+
+	/* Configure flash wait states before we switch to the PLL */
+	bl flash_cfg
+
+	/* Set up PLL */
+	bl pll_cfg
+
+	/* Turn off the Green LED and leave the Red LED on */
+	bl green_LED_off
+
+	/* Setup SDRAM */
+	bl sdram_cfg
+
+	/* Turn on Green LED, Turn off the Red LED */
+	bl green_LED_on
+	bl red_LED_off
+
+	/* FIXME: we use async mode for now */
+	mrc p15, 0, r0, c1, c0, 0
+	orr r0, r0, #0xc0000000
+	mcr p15, 0, r0, c1, c0, 0
+
+	/* restore return address */
+	ldr r1, =SYSCON_SCRATCH0
+	ldr lr, [r1]
+
+	mov pc, lr
diff --git a/cpu/arm920t/ep93xx/speed.c b/cpu/arm920t/ep93xx/speed.c
new file mode 100644
index 0000000..c83a3bb
--- /dev/null
+++ b/cpu/arm920t/ep93xx/speed.c
@@ -0,0 +1,110 @@
+/*
+ * Cirrus Logic EP93xx PLL support.
+ *
+ * Copyright (C) 2009 Matthias Kaehlcke <matthias@kaehlcke.net>
+ *
+ * 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.,
+ * 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <common.h>
+#include <asm/arch/ep93xx.h>
+#include <asm/io.h>
+#include <div64.h>
+
+/*
+ * CONFIG_SYS_CLK_FREQ should be defined as the input frequency of the PLL.
+ *
+ * get_FCLK(), get_HCLK(), get_PCLK() and get_UCLK() return the clock of
+ * the specified bus in HZ.
+ */
+
+/*
+ * return the PLL output frequency
+ *
+ * PLL rate = CONFIG_SYS_CLK_FREQ * (X1FBD + 1) * (X2FBD + 1)
+ * / (X2IPD + 1) / 2^PS
+ */
+static ulong get_PLLCLK(uint32_t *pllreg)
+{
+	uint8_t i;
+	const uint32_t clkset = readl(pllreg);
+	uint64_t rate = CONFIG_SYS_CLK_FREQ;
+	rate *= ((clkset >> SYSCON_CLKSET_PLL_X1FBD1_SHIFT) & 0x1f) + 1;
+	rate *= ((clkset >> SYSCON_CLKSET_PLL_X2FBD2_SHIFT) & 0x3f) + 1;
+	do_div(rate, (clkset  & 0x1f) + 1);			/* X2IPD */
+	for (i = 0; i < ((clkset >> SYSCON_CLKSET_PLL_PS_SHIFT) & 3); i++)
+		rate >>= 1;
+
+	return (ulong)rate;
+}
+
+/* return FCLK frequency */
+ulong get_FCLK()
+{
+	const uint8_t fclk_divisors[] = { 1, 2, 4, 8, 16, 1, 1, 1 };
+	struct syscon_regs *syscon = (struct syscon_regs *)SYSCON_BASE;
+
+	const uint32_t clkset1 = readl(&syscon->clkset1);
+	const uint8_t fclk_div =
+		fclk_divisors[(clkset1 >> SYSCON_CLKSET1_FCLK_DIV_SHIFT) & 7];
+	const ulong fclk_rate = get_PLLCLK(&syscon->clkset1) / fclk_div;
+
+	return fclk_rate;
+}
+
+/* return HCLK frequency */
+ulong get_HCLK(void)
+{
+	const uint8_t hclk_divisors[] = { 1, 2, 4, 5, 6, 8, 16, 32 };
+	struct syscon_regs *syscon = (struct syscon_regs *)SYSCON_BASE;
+
+	const uint32_t clkset1 = readl(&syscon->clkset1);
+	const uint8_t hclk_div =
+		hclk_divisors[(clkset1 >> SYSCON_CLKSET1_HCLK_DIV_SHIFT) & 7];
+	const ulong hclk_rate = get_PLLCLK(&syscon->clkset1) / hclk_div;
+
+	return hclk_rate;
+}
+
+/* return PCLK frequency */
+ulong get_PCLK(void)
+{
+	const uint8_t pclk_divisors[] = { 1, 2, 4, 8 };
+	struct syscon_regs *syscon = (struct syscon_regs *)SYSCON_BASE;
+
+	const uint32_t clkset1 = readl(&syscon->clkset1);
+	const uint8_t pclk_div =
+		pclk_divisors[(clkset1 >> SYSCON_CLKSET1_PCLK_DIV_SHIFT) & 3];
+	const ulong pclk_rate = get_HCLK() / pclk_div;
+
+	return pclk_rate;
+}
+
+/* return UCLK frequency */
+ulong get_UCLK(void)
+{
+	struct syscon_regs *syscon = (struct syscon_regs *)SYSCON_BASE;
+	ulong uclk_rate;
+
+	const uint32_t value = readl(&syscon->pwrcnt);
+	if (value & SYSCON_PWRCNT_UART_BAUD)
+		uclk_rate = CONFIG_SYS_CLK_FREQ;
+	else
+		uclk_rate = CONFIG_SYS_CLK_FREQ / 2;
+
+	return uclk_rate;
+}
diff --git a/cpu/arm920t/ep93xx/timer.c b/cpu/arm920t/ep93xx/timer.c
new file mode 100644
index 0000000..6d969d9
--- /dev/null
+++ b/cpu/arm920t/ep93xx/timer.c
@@ -0,0 +1,168 @@
+/*
+ * Cirrus Logic EP93xx timer support.
+ *
+ * Copyright (C) 2009, 2010
+ * Matthias Kaehlcke <matthias@kaehlcke.net>
+ *
+ * Copyright (C) 2004, 2005
+ * Cory T. Tusar, Videon Central, Inc., <ctusar@videon-central.com>
+ *
+ * Based on the original intr.c Cirrus Logic EP93xx Rev D. interrupt support,
+ * author unknown.
+ *
+ * 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.,
+ * 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <common.h>
+#include <linux/types.h>
+#include <asm/arch/ep93xx.h>
+#include <asm/io.h>
+
+#define TIMER_CLKSEL	(1 << 3)
+#define TIMER_MODE	(1 << 6)
+#define TIMER_ENABLE	(1 << 7)
+
+#define TIMER_FREQ	508469
+#define TIMER_LOAD_VAL	(TIMER_FREQ / CONFIG_SYS_HZ)
+
+static ulong timestamp;
+static ulong lastdec;
+
+static inline unsigned long clk_to_systicks(unsigned long clk_ticks)
+{
+	unsigned long sys_ticks = (clk_ticks * CONFIG_SYS_HZ) / TIMER_FREQ;
+
+	return sys_ticks;
+}
+
+static inline unsigned long usecs_to_ticks(unsigned long usecs)
+{
+	unsigned long ticks;
+
+	if (usecs >= 1000) {
+		ticks = usecs / 1000;
+		ticks *= (TIMER_LOAD_VAL * CONFIG_SYS_HZ);
+		ticks /= 1000;
+	} else {
+		ticks = usecs * TIMER_LOAD_VAL * CONFIG_SYS_HZ;
+		ticks /= (1000 * 1000);
+	}
+
+	return ticks;
+}
+
+static inline unsigned long read_timer(void)
+{
+	struct timer_regs *timer = (struct timer_regs *)TIMER_BASE;
+
+	return readl(&timer->timer3.value);
+}
+
+/*
+ * timer without interrupts
+ */
+unsigned long long get_ticks(void)
+{
+	const unsigned long now = read_timer();
+
+	if (lastdec >= now) {
+		/* normal mode */
+		timestamp += lastdec - now;
+	} else {
+		/* we have an overflow ... */
+		timestamp += lastdec + TIMER_LOAD_VAL - now;
+	}
+
+	lastdec = now;
+
+	return timestamp;
+}
+
+unsigned long get_timer_masked(void)
+{
+	return clk_to_systicks(get_ticks());
+}
+
+unsigned long get_timer(unsigned long base)
+{
+	return get_timer_masked() - base;
+}
+
+void reset_timer_masked(void)
+{
+	lastdec = read_timer();
+	timestamp = 0;
+}
+
+void reset_timer(void)
+{
+	reset_timer_masked();
+}
+
+void set_timer(unsigned long t)
+{
+	timestamp = t;
+}
+
+void __udelay(unsigned long usec)
+{
+	const unsigned long ticks = usecs_to_ticks(usec);
+	const unsigned long target = clk_to_systicks(ticks) + get_timer(0);
+
+	while (get_timer_masked() < target)
+		/* noop */;
+}
+
+void udelay_masked(unsigned long usec)
+{
+	const unsigned long ticks = usecs_to_ticks(usec);
+	const unsigned long target = clk_to_systicks(ticks) + get_timer(0);
+
+	reset_timer_masked();
+
+	while (get_timer_masked() < target)
+		/* noop */;
+}
+
+int timer_init(void)
+{
+	struct timer_regs *timer = (struct timer_regs *)TIMER_BASE;
+
+	/* use timer 3 with 508KHz and free running */
+	writel(TIMER_CLKSEL, &timer->timer3.control);
+
+	/* auto load, manual update of Timer 3 */
+	lastdec = TIMER_LOAD_VAL;
+	writel(TIMER_LOAD_VAL, &timer->timer3.load);
+
+	/* Enable the timer and periodic mode */
+	writel(TIMER_ENABLE | TIMER_MODE | TIMER_CLKSEL,
+		&timer->timer3.control);
+
+	reset_timer_masked();
+
+	return 0;
+}
+
+/*
+ * This function is derived from PowerPC code (timebase clock frequency).
+ * On ARM it returns the number of timer ticks per second.
+ */
+unsigned long get_tbclk(void)
+{
+	return CONFIG_SYS_HZ;
+}
diff --git a/cpu/arm920t/ep93xx/u-boot.lds b/cpu/arm920t/ep93xx/u-boot.lds
new file mode 100644
index 0000000..737c9d8
--- /dev/null
+++ b/cpu/arm920t/ep93xx/u-boot.lds
@@ -0,0 +1,59 @@
+/*
+ * (C) Copyright 2002
+ * Gary Jennejohn, DENX Software Engineering, <gj@denx.de>
+ *
+ * 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., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+OUTPUT_FORMAT("elf32-littlearm", "elf32-littlearm", "elf32-littlearm")
+OUTPUT_ARCH(arm)
+ENTRY(_start)
+SECTIONS
+{
+	. = 0x00000000;
+
+	. = ALIGN(4);
+	.text      :
+	{
+	  cpu/arm920t/start.o	(.text)
+		/* the EP93xx expects to find the pattern 'CRUS' at 0x1000 */
+	  . = 0x1000;
+	  LONG(0x53555243)
+	  *(.text)
+	}
+
+	. = ALIGN(4);
+	.rodata : { *(.rodata) }
+
+	. = ALIGN(4);
+	.data : { *(.data) }
+
+	. = ALIGN(4);
+	.got : { *(.got) }
+
+	. = .;
+	__u_boot_cmd_start = .;
+	.u_boot_cmd : { *(.u_boot_cmd) }
+	__u_boot_cmd_end = .;
+
+	. = ALIGN(4);
+	__bss_start = .;
+	.bss : { *(.bss) }
+	_end = .;
+}
diff --git a/include/asm-arm/arch-ep93xx/ep93xx.h b/include/asm-arm/arch-ep93xx/ep93xx.h
new file mode 100644
index 0000000..6cafe54
--- /dev/null
+++ b/include/asm-arm/arch-ep93xx/ep93xx.h
@@ -0,0 +1,595 @@
+/*
+ * Cirrus Logic EP93xx register definitions.
+ *
+ * Copyright (C) 2009
+ * Matthias Kaehlcke <matthias@kaehlcke.net>
+ *
+ * Copyright (C) 2006
+ * Dominic Rath <Dominic.Rath@gmx.de>
+ *
+ * Copyright (C) 2004, 2005
+ * Cory T. Tusar, Videon Central, Inc., <ctusar@videon-central.com>
+ *
+ * Based in large part on linux/include/asm-arm/arch-ep93xx/regmap.h, which is
+ *
+ * Copyright (C) 2004 Ray Lehtiniemi
+ * Copyright (C) 2003 Cirrus Logic, Inc
+ * Copyright (C) 1999 ARM Limited.
+ *
+ * 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.,
+ * 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#define EP93XX_AHB_BASE			0x80000000
+#define EP93XX_APB_BASE			0x80800000
+
+/*
+ * 0x80000000 - 0x8000FFFF: DMA
+ */
+#define DMA_OFFSET			0x000000
+#define DMA_BASE			(EP93XX_AHB_BASE | DMA_OFFSET)
+
+#ifndef __ASSEMBLY__
+struct dma_channel {
+	uint32_t control;
+	uint32_t interrupt;
+	uint32_t ppalloc;
+	uint32_t status;
+	uint32_t reserved0;
+	uint32_t remain;
+	uint32_t reserved1[2];
+	uint32_t maxcnt0;
+	uint32_t base0;
+	uint32_t current0;
+	uint32_t reserved2;
+	uint32_t maxcnt1;
+	uint32_t base1;
+	uint32_t current1;
+	uint32_t reserved3;
+};
+
+struct dma_regs {
+	struct dma_channel m2p_channel_0;
+	struct dma_channel m2p_channel_1;
+	struct dma_channel m2p_channel_2;
+	struct dma_channel m2p_channel_3;
+	struct dma_channel m2m_channel_0;
+	struct dma_channel m2m_channel_1;
+	struct dma_channel reserved0[2];
+	struct dma_channel m2p_channel_5;
+	struct dma_channel m2p_channel_4;
+	struct dma_channel m2p_channel_7;
+	struct dma_channel m2p_channel_6;
+	struct dma_channel m2p_channel_9;
+	struct dma_channel m2p_channel_8;
+	uint32_t channel_arbitration;
+	uint32_t reserved[15];
+	uint32_t global_interrupt;
+};
+#endif
+
+/*
+ * 0x80010000 - 0x8001FFFF: Ethernet MAC
+ */
+#define MAC_OFFSET			0x010000
+#define MAC_BASE			(EP93XX_AHB_BASE | MAC_OFFSET)
+
+#ifndef __ASSEMBLY__
+struct mac_queue {
+	uint32_t badd;
+	union { /* deal with half-word aligned registers */
+		uint32_t blen;
+		union {
+			uint16_t filler;
+			uint16_t curlen;
+		};
+	};
+	uint32_t curadd;
+};
+
+struct mac_regs {
+	uint32_t rxctl;
+	uint32_t txctl;
+	uint32_t testctl;
+	uint32_t reserved0;
+	uint32_t miicmd;
+	uint32_t miidata;
+	uint32_t miists;
+	uint32_t reserved1;
+	uint32_t selfctl;
+	uint32_t inten;
+	uint32_t intstsp;
+	uint32_t intstsc;
+	uint32_t reserved2[2];
+	uint32_t diagad;
+	uint32_t diagdata;
+	uint32_t gt;
+	uint32_t fct;
+	uint32_t fcf;
+	uint32_t afp;
+	union {
+		struct {
+			uint32_t indad;
+			uint32_t indad_upper;
+		};
+		uint32_t hashtbl;
+	};
+	uint32_t reserved3[2];
+	uint32_t giintsts;
+	uint32_t giintmsk;
+	uint32_t giintrosts;
+	uint32_t giintfrc;
+	uint32_t txcollcnt;
+	uint32_t rxmissnct;
+	uint32_t rxruntcnt;
+	uint32_t reserved4;
+	uint32_t bmctl;
+	uint32_t bmsts;
+	uint32_t rxbca;
+	uint32_t reserved5;
+	struct mac_queue rxdq;
+	uint32_t rxdqenq;
+	struct mac_queue rxstsq;
+	uint32_t rxstsqenq;
+	struct mac_queue txdq;
+	uint32_t txdqenq;
+	struct mac_queue txstsq;
+	uint32_t reserved6;
+	uint32_t rxbufthrshld;
+	uint32_t txbufthrshld;
+	uint32_t rxststhrshld;
+	uint32_t txststhrshld;
+	uint32_t rxdthrshld;
+	uint32_t txdthrshld;
+	uint32_t maxfrmlen;
+	uint32_t maxhdrlen;
+};
+#endif
+
+#define SELFCTL_RWP		(1 << 7)
+#define SELFCTL_GPO0		(1 << 5)
+#define SELFCTL_PUWE		(1 << 4)
+#define SELFCTL_PDWE		(1 << 3)
+#define SELFCTL_MIIL		(1 << 2)
+#define SELFCTL_RESET		(1 << 0)
+
+#define INTSTS_RWI		(1 << 30)
+#define INTSTS_RXMI		(1 << 29)
+#define INTSTS_RXBI		(1 << 28)
+#define INTSTS_RXSQI		(1 << 27)
+#define INTSTS_TXLEI		(1 << 26)
+#define INTSTS_ECIE		(1 << 25)
+#define INTSTS_TXUHI		(1 << 24)
+#define INTSTS_MOI		(1 << 18)
+#define INTSTS_TXCOI		(1 << 17)
+#define INTSTS_RXROI		(1 << 16)
+#define INTSTS_MIII		(1 << 12)
+#define INTSTS_PHYI		(1 << 11)
+#define INTSTS_TI		(1 << 10)
+#define INTSTS_AHBE		(1 << 8)
+#define INTSTS_OTHER		(1 << 4)
+#define INTSTS_TXSQ		(1 << 3)
+#define INTSTS_RXSQ		(1 << 2)
+
+#define BMCTL_MT		(1 << 13)
+#define BMCTL_TT		(1 << 12)
+#define BMCTL_UNH		(1 << 11)
+#define BMCTL_TXCHR		(1 << 10)
+#define BMCTL_TXDIS		(1 << 9)
+#define BMCTL_TXEN		(1 << 8)
+#define BMCTL_EH2		(1 << 6)
+#define BMCTL_EH1		(1 << 5)
+#define BMCTL_EEOB		(1 << 4)
+#define BMCTL_RXCHR		(1 << 2)
+#define BMCTL_RXDIS		(1 << 1)
+#define BMCTL_RXEN		(1 << 0)
+
+#define BMSTS_TXACT		(1 << 7)
+#define BMSTS_TP		(1 << 4)
+#define BMSTS_RXACT		(1 << 3)
+#define BMSTS_QID_MASK		0x07
+#define BMSTS_QID_RXDATA	0x00
+#define BMSTS_QID_TXDATA	0x01
+#define BMSTS_QID_RXSTS		0x02
+#define BMSTS_QID_TXSTS		0x03
+#define BMSTS_QID_RXDESC	0x04
+#define BMSTS_QID_TXDESC	0x05
+
+#define AFP_MASK		0x07
+#define AFP_IAPRIMARY		0x00
+#define AFP_IASECONDARY1	0x01
+#define AFP_IASECONDARY2	0x02
+#define AFP_IASECONDARY3	0x03
+#define AFP_TX			0x06
+#define AFP_HASH		0x07
+
+#define RXCTL_PAUSEA		(1 << 20)
+#define RXCTL_RXFCE1		(1 << 19)
+#define RXCTL_RXFCE0		(1 << 18)
+#define RXCTL_BCRC		(1 << 17)
+#define RXCTL_SRXON		(1 << 16)
+#define RXCTL_RCRCA		(1 << 13)
+#define RXCTL_RA		(1 << 12)
+#define RXCTL_PA		(1 << 11)
+#define RXCTL_BA		(1 << 10)
+#define RXCTL_MA		(1 << 9)
+#define RXCTL_IAHA		(1 << 8)
+#define RXCTL_IA3		(1 << 3)
+#define RXCTL_IA2		(1 << 2)
+#define RXCTL_IA1		(1 << 1)
+#define RXCTL_IA0		(1 << 0)
+
+#define TXCTL_DEFDIS		(1 << 7)
+#define TXCTL_MBE		(1 << 6)
+#define TXCTL_ICRC		(1 << 5)
+#define TXCTL_TPD		(1 << 4)
+#define TXCTL_OCOLL		(1 << 3)
+#define TXCTL_SP		(1 << 2)
+#define TXCTL_PB		(1 << 1)
+#define TXCTL_STXON		(1 << 0)
+
+#define MIICMD_REGAD_MASK	(0x001F)
+#define MIICMD_PHYAD_MASK	(0x03E0)
+#define MIICMD_OPCODE_MASK	(0xC000)
+#define MIICMD_PHYAD_8950	(0x0000)
+#define MIICMD_OPCODE_READ	(0x8000)
+#define MIICMD_OPCODE_WRITE	(0x4000)
+
+#define MIISTS_BUSY		(1 << 0)
+
+/*
+ * 0x80020000 - 0x8002FFFF: USB OHCI
+ */
+#define USB_OFFSET			0x020000
+#define USB_BASE			(EP93XX_AHB_BASE | USB_OFFSET)
+
+/*
+ * 0x80030000 - 0x8003FFFF: Raster engine
+ */
+#if (defined(CONFIG_EP9307) || defined(CONFIG_EP9312) || defined(CONFIG_EP9315))
+#define RASTER_OFFSET			0x030000
+#define RASTER_BASE			(EP93XX_AHB_BASE | RASTER_OFFSET)
+#endif
+
+/*
+ * 0x80040000 - 0x8004FFFF: Graphics accelerator
+ */
+#if defined(CONFIG_EP9315)
+#define GFX_OFFSET			0x040000
+#define GFX_BASE			(EP93XX_AHB_BASE | GFX_OFFSET)
+#endif
+
+/*
+ * 0x80050000 - 0x8005FFFF: Reserved
+ */
+
+/*
+ * 0x80060000 - 0x8006FFFF: SDRAM controller
+ */
+#define SDRAM_OFFSET			0x060000
+#define SDRAM_BASE			(EP93XX_AHB_BASE | SDRAM_OFFSET)
+
+#ifndef __ASSEMBLY__
+struct sdram_regs {
+	uint32_t reserved;
+	uint32_t glconfig;
+	uint32_t refrshtimr;
+	uint32_t bootsts;
+	uint32_t devcfg0;
+	uint32_t devcfg1;
+	uint32_t devcfg2;
+	uint32_t devcfg3;
+};
+#endif
+
+#define SDRAM_DEVCFG_EXTBUSWIDTH	(1 << 2)
+#define SDRAM_DEVCFG_BANKCOUNT		(1 << 3)
+#define SDRAM_DEVCFG_SROMLL		(1 << 5)
+#define SDRAM_DEVCFG_CASLAT_2		0x00010000
+#define SDRAM_DEVCFG_RASTOCAS_2		0x00200000
+
+#define GLCONFIG_INIT			(1 << 0)
+#define GLCONFIG_MRS			(1 << 1)
+#define GLCONFIG_SMEMBUSY		(1 << 5)
+#define GLCONFIG_LCR			(1 << 6)
+#define GLCONFIG_REARBEN		(1 << 7)
+#define GLCONFIG_CLKSHUTDOWN		(1 << 30)
+#define GLCONFIG_CKE			(1 << 31)
+
+/*
+ * 0x80070000 - 0x8007FFFF: Reserved
+ */
+
+/*
+ * 0x80080000 - 0x8008FFFF: SRAM controller & PCMCIA
+ */
+#define SMC_OFFSET			0x080000
+#define SMC_BASE			(EP93XX_AHB_BASE | SMC_OFFSET)
+
+#ifndef __ASSEMBLY__
+struct smc_regs {
+	uint32_t bcr0;
+	uint32_t bcr1;
+	uint32_t bcr2;
+	uint32_t bcr3;
+	uint32_t reserved0[2];
+	uint32_t bcr6;
+	uint32_t bcr7;
+#if defined(CONFIG_EP9315)
+	uint32_t pcattribute;
+	uint32_t pccommon;
+	uint32_t pcio;
+	uint32_t reserved1[5];
+	uint32_t pcmciactrl;
+#endif
+};
+#endif
+
+#define SMC_BCR_IDCY_SHIFT	0
+#define SMC_BCR_WST1_SHIFT	5
+#define SMC_BCR_BLE		(1 << 10)
+#define SMC_BCR_WST2_SHIFT	11
+#define SMC_BCR_MW_SHIFT	28
+
+/*
+ * 0x80090000 - 0x8009FFFF: Boot ROM
+ */
+
+/*
+ * 0x800A0000 - 0x800AFFFF: IDE interface
+ */
+
+/*
+ * 0x800B0000 - 0x800BFFFF: VIC1
+ */
+
+/*
+ * 0x800C0000 - 0x800CFFFF: VIC2
+ */
+
+/*
+ * 0x800D0000 - 0x800FFFFF: Reserved
+ */
+
+/*
+ * 0x80800000 - 0x8080FFFF: Reserved
+ */
+
+/*
+ * 0x80810000 - 0x8081FFFF: Timers
+ */
+#define TIMER_OFFSET		0x010000
+#define TIMER_BASE		(EP93XX_APB_BASE | TIMER_OFFSET)
+
+#ifndef __ASSEMBLY__
+struct timer {
+	uint32_t load;
+	uint32_t value;
+	uint32_t control;
+	uint32_t clear;
+};
+
+struct timer4 {
+	uint32_t value_low;
+	uint32_t value_high;
+};
+
+struct timer_regs {
+	struct timer timer1;
+	uint32_t reserved0[4];
+	struct timer timer2;
+	uint32_t reserved1[12];
+	struct timer4 timer4;
+	uint32_t reserved2[6];
+	struct timer timer3;
+};
+#endif
+
+/*
+ * 0x80820000 - 0x8082FFFF: I2S
+ */
+#define I2S_OFFSET		0x020000
+#define I2S_BASE		(EP93XX_APB_BASE | I2S_OFFSET)
+
+/*
+ * 0x80830000 - 0x8083FFFF: Security
+ */
+#define SECURITY_OFFSET		0x030000
+#define SECURITY_BASE		(EP93XX_APB_BASE | SECURITY_OFFSET)
+
+#define EXTENSIONID		(SECURITY_BASE + 0x2714)
+
+/*
+ * 0x80840000 - 0x8084FFFF: GPIO
+ */
+#define GPIO_OFFSET		0x040000
+#define GPIO_BASE		(EP93XX_APB_BASE | GPIO_OFFSET)
+
+#ifndef __ASSEMBLY__
+struct gpio_int {
+	uint32_t inttype1;
+	uint32_t inttype2;
+	uint32_t eoi;
+	uint32_t inten;
+	uint32_t intsts;
+	uint32_t rawintsts;
+	uint32_t db;
+};
+
+struct gpio_regs {
+	uint32_t padr;
+	uint32_t pbdr;
+	uint32_t pcdr;
+	uint32_t pddr;
+	uint32_t paddr;
+	uint32_t pbddr;
+	uint32_t pcddr;
+	uint32_t pdddr;
+	uint32_t pedr;
+	uint32_t peddr;
+	uint32_t reserved0[2];
+	uint32_t pfdr;
+	uint32_t pfddr;
+	uint32_t pgdr;
+	uint32_t pgddr;
+	uint32_t phdr;
+	uint32_t phddr;
+	uint32_t reserved1;
+	uint32_t finttype1;
+	uint32_t finttype2;
+	uint32_t reserved2;
+	struct gpio_int pfint;
+	uint32_t reserved3[10];
+	struct gpio_int paint;
+	struct gpio_int pbint;
+	uint32_t eedrive;
+};
+#endif
+
+/*
+ * 0x80850000 - 0x8087FFFF: Reserved
+ */
+
+/*
+ * 0x80880000 - 0x8088FFFF: AAC
+ */
+#define AAC_OFFSET		0x080000
+#define AAC_BASE		(EP93XX_APB_BASE | AAC_OFFSET)
+
+/*
+ * 0x80890000 - 0x8089FFFF: Reserved
+ */
+
+/*
+ * 0x808A0000 - 0x808AFFFF: SPI
+ */
+#define SPI_OFFSET		0x0A0000
+#define SPI_BASE		(EP93XX_APB_BASE | SPI_OFFSET)
+
+/*
+ * 0x808B0000 - 0x808BFFFF: IrDA
+ */
+#define IRDA_OFFSET		0x0B0000
+#define IRDA_BASE		(EP93XX_APB_BASE | IRDA_OFFSET)
+
+/*
+ * 0x808C0000 - 0x808CFFFF: UART1
+ */
+#define UART1_OFFSET		0x0C0000
+#define UART1_BASE		(EP93XX_APB_BASE | UART1_OFFSET)
+
+/*
+ * 0x808D0000 - 0x808DFFFF: UART2
+ */
+#define UART2_OFFSET		0x0D0000
+#define UART2_BASE		(EP93XX_APB_BASE | UART2_OFFSET)
+
+/*
+ * 0x808E0000 - 0x808EFFFF: UART3
+ */
+#define UART3_OFFSET		0x0E0000
+#define UART3_BASE		(EP93XX_APB_BASE | UART3_OFFSET)
+
+/*
+ * 0x808F0000 - 0x808FFFFF: Key Matrix
+ */
+#define KEY_OFFSET		0x0F0000
+#define KEY_BASE		(EP93XX_APB_BASE | KEY_OFFSET)
+
+/*
+ * 0x80900000 - 0x8090FFFF: Touchscreen
+ */
+#define TOUCH_OFFSET		0x900000
+#define TOUCH_BASE		(EP93XX_APB_BASE | TOUCH_OFFSET)
+
+/*
+ * 0x80910000 - 0x8091FFFF: Pulse Width Modulation
+ */
+#define PWM_OFFSET		0x910000
+#define PWM_BASE		(EP93XX_APB_BASE | PWM_OFFSET)
+
+/*
+ * 0x80920000 - 0x8092FFFF: Real time clock
+ */
+#define RTC_OFFSET		0x920000
+#define RTC_BASE		(EP93XX_APB_BASE | RTC_OFFSET)
+
+/*
+ * 0x80930000 - 0x8093FFFF: Syscon
+ */
+#define SYSCON_OFFSET		0x930000
+#define SYSCON_BASE		(EP93XX_APB_BASE | SYSCON_OFFSET)
+
+#ifndef __ASSEMBLY__
+struct syscon_regs {
+	uint32_t pwrsts;
+	uint32_t pwrcnt;
+	uint32_t halt;
+	uint32_t stby;
+	uint32_t reserved0[2];
+	uint32_t teoi;
+	uint32_t stfclr;
+	uint32_t clkset1;
+	uint32_t clkset2;
+	uint32_t reserved1[6];
+	uint32_t scratch0;
+	uint32_t scratch1;
+	uint32_t reserved2[2];
+	uint32_t apbwait;
+	uint32_t bustmstrarb;
+	uint32_t bootmodeclr;
+	uint32_t reserved3[9];
+	uint32_t devicecfg;
+	uint32_t vidclkdiv;
+	uint32_t mirclkdiv;
+	uint32_t i2sclkdiv;
+	uint32_t keytchclkdiv;
+	uint32_t chipid;
+	uint32_t syscfg;
+	uint32_t reserved4[8];
+	uint32_t sysswlock;
+};
+#else
+#define SYSCON_SCRATCH0		(SYSCON_BASE + 0x0040)
+#endif
+
+#define SYSCON_PWRCNT_UART_BAUD			(1 << 29)
+
+#define SYSCON_CLKSET_PLL_X2IPD_SHIFT		0
+#define SYSCON_CLKSET_PLL_X2FBD2_SHIFT		5
+#define SYSCON_CLKSET_PLL_X1FBD1_SHIFT		11
+#define SYSCON_CLKSET_PLL_PS_SHIFT		16
+#define SYSCON_CLKSET1_PCLK_DIV_SHIFT		18
+#define SYSCON_CLKSET1_HCLK_DIV_SHIFT		20
+#define SYSCON_CLKSET1_NBYP1			(1 << 23)
+#define SYSCON_CLKSET1_FCLK_DIV_SHIFT		25
+
+#define SYSCON_CLKSET2_PLL2_EN			(1 << 18)
+#define SYSCON_CLKSET2_NBYP2			(1 << 19)
+#define SYSCON_CLKSET2_USB_DIV_SHIFT		28
+
+#define SYSCON_CHIPID_REV_MASK			0xF0000000
+#define SYSCON_DEVICECFG_SWRST			(1 << 31)
+
+/*
+ * 0x80930000 - 0x8093FFFF: Watchdog Timer
+ */
+#define WATCHDOG_OFFSET		0x940000
+#define WATCHDOG_BASE		(EP93XX_APB_BASE | WATCHDOG_OFFSET)
+
+/*
+ * 0x80950000 - 0x9000FFFF: Reserved
+ */
diff --git a/include/common.h b/include/common.h
index 81f2b59..86e3163 100644
--- a/include/common.h
+++ b/include/common.h
@@ -502,7 +502,8 @@ ulong	get_PCI_freq (void);
 #endif
 #if defined(CONFIG_S3C24X0) || \
     defined(CONFIG_LH7A40X) || \
-    defined(CONFIG_S3C6400)
+    defined(CONFIG_S3C6400) || \
+    defined(CONFIG_EP93XX)
 ulong	get_FCLK (void);
 ulong	get_HCLK (void);
 ulong	get_PCLK (void);