Patch by Steven Scholz, 06 Apr 2005:

- creating SoC subdir for Atmel AT91RM9200 cpu/arm920t/at91rm9200
- moving code out of cpu/at91rm9200 into cpu/arm920t/at91rm9200

6 files changed, 1054 insertions, 0 deletions

diff --git a/cpu/arm920t/at91rm9200/Makefile b/cpu/arm920t/at91rm9200/Makefile
new file mode 100644
index 0000000000..0c9bcb25cd
--- /dev/null
+++ b/cpu/arm920t/at91rm9200/Makefile
@@ -0,0 +1,43 @@
+#
+# (C) Copyright 2000-2005
+# 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., 59 Temple Place, Suite 330, Boston,
+# MA 02111-1307 USA
+#
+
+include $(TOPDIR)/config.mk
+
+LIB	= lib$(SOC).a
+
+OBJS	= ether.o i2c.o interrupts.o serial.o
+SOBJS	= lowlevel_init.o
+
+all:	.depend $(LIB)
+
+$(LIB):	$(OBJS) $(SOBJS)
+	$(AR) crv $@ $(OBJS) $(SOBJS)
+
+#########################################################################
+
+.depend:	Makefile $(OBJS:.o=.c)
+		$(CC) -M $(CFLAGS) $(OBJS:.o=.c) > $@
+
+sinclude .depend
+
+#########################################################################
diff --git a/cpu/arm920t/at91rm9200/ether.c b/cpu/arm920t/at91rm9200/ether.c
new file mode 100644
index 0000000000..0bc1d89ed0
--- /dev/null
+++ b/cpu/arm920t/at91rm9200/ether.c
@@ -0,0 +1,294 @@
+/*
+ * (C) Copyright 2003
+ * Author : Hamid Ikdoumi (Atmel)
+ *
+ * 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 <at91rm9200_net.h>
+#include <net.h>
+
+/* ----- Ethernet Buffer definitions ----- */
+
+typedef struct {
+	unsigned long addr, size;
+} rbf_t;
+
+#define RBF_ADDR      0xfffffffc
+#define RBF_OWNER     (1<<0)
+#define RBF_WRAP      (1<<1)
+#define RBF_BROADCAST (1<<31)
+#define RBF_MULTICAST (1<<30)
+#define RBF_UNICAST   (1<<29)
+#define RBF_EXTERNAL  (1<<28)
+#define RBF_UNKOWN    (1<<27)
+#define RBF_SIZE      0x07ff
+#define RBF_LOCAL4    (1<<26)
+#define RBF_LOCAL3    (1<<25)
+#define RBF_LOCAL2    (1<<24)
+#define RBF_LOCAL1    (1<<23)
+
+/* Emac Buffers in last 512KBytes of SDRAM*/
+/* Be careful, buffer size is limited to 512KBytes !!! */
+#define RBF_FRAMEMAX 100
+/*#define RBF_FRAMEMEM 0x200000 */
+#define RBF_FRAMEMEM 0x21F80000
+#define RBF_FRAMELEN 0x600
+
+#define RBF_FRAMEBTD RBF_FRAMEMEM
+#define RBF_FRAMEBUF (RBF_FRAMEMEM + RBF_FRAMEMAX*sizeof(rbf_t))
+
+
+#ifdef CONFIG_DRIVER_ETHER
+
+#if (CONFIG_COMMANDS & CFG_CMD_NET)
+
+/* structure to interface the PHY */
+AT91S_PhyOps PhyOps;
+
+AT91PS_EMAC p_mac;
+
+/*********** EMAC Phy layer Management functions *************************/
+/*
+ * Name:
+ *	at91rm9200_EmacEnableMDIO
+ * Description:
+ *	Enables the MDIO bit in MAC control register
+ * Arguments:
+ *	p_mac - pointer to struct AT91S_EMAC
+ * Return value:
+ *	none
+ */
+void at91rm9200_EmacEnableMDIO (AT91PS_EMAC p_mac)
+{
+	/* Mac CTRL reg set for MDIO enable */
+	p_mac->EMAC_CTL |= AT91C_EMAC_MPE;	/* Management port enable */
+}
+
+/*
+ * Name:
+ *	at91rm9200_EmacDisableMDIO
+ * Description:
+ *	Disables the MDIO bit in MAC control register
+ * Arguments:
+ *	p_mac - pointer to struct AT91S_EMAC
+ * Return value:
+ *	none
+ */
+void at91rm9200_EmacDisableMDIO (AT91PS_EMAC p_mac)
+{
+	/* Mac CTRL reg set for MDIO disable */
+	p_mac->EMAC_CTL &= ~AT91C_EMAC_MPE;	/* Management port disable */
+}
+
+
+/*
+ * Name:
+ *	at91rm9200_EmacReadPhy
+ * Description:
+ *	Reads data from the PHY register
+ * Arguments:
+ *	dev - pointer to struct net_device
+ *	RegisterAddress - unsigned char
+ * 	pInput - pointer to value read from register
+ * Return value:
+ *	TRUE - if data read successfully
+ */
+UCHAR at91rm9200_EmacReadPhy (AT91PS_EMAC p_mac,
+				     unsigned char RegisterAddress,
+				     unsigned short *pInput)
+{
+	p_mac->EMAC_MAN = (AT91C_EMAC_HIGH & ~AT91C_EMAC_LOW) |
+			  (AT91C_EMAC_RW_R) |
+			  (RegisterAddress << 18) |
+			  (AT91C_EMAC_CODE_802_3);
+
+	udelay (10000);
+
+	*pInput = (unsigned short) p_mac->EMAC_MAN;
+
+	return TRUE;
+}
+
+
+/*
+ * Name:
+ *	at91rm9200_EmacWritePhy
+ * Description:
+ *	Writes data to the PHY register
+ * Arguments:
+ *	dev - pointer to struct net_device
+ *	RegisterAddress - unsigned char
+ * 	pOutput - pointer to value to be written in the register
+ * Return value:
+ *	TRUE - if data read successfully
+ */
+UCHAR at91rm9200_EmacWritePhy (AT91PS_EMAC p_mac,
+				      unsigned char RegisterAddress,
+				      unsigned short *pOutput)
+{
+	p_mac->EMAC_MAN = (AT91C_EMAC_HIGH & ~AT91C_EMAC_LOW) |
+			AT91C_EMAC_CODE_802_3 | AT91C_EMAC_RW_W |
+			(RegisterAddress << 18) | *pOutput;
+
+	udelay (10000);
+
+	return TRUE;
+}
+
+
+rbf_t *rbfdt;
+rbf_t *rbfp;
+
+int eth_init (bd_t * bd)
+{
+	int ret;
+	int i;
+
+	p_mac = AT91C_BASE_EMAC;
+
+	/* PIO Disable Register */
+	*AT91C_PIOA_PDR = AT91C_PA16_EMDIO | AT91C_PA15_EMDC | AT91C_PA14_ERXER |
+			  AT91C_PA13_ERX1 | AT91C_PA12_ERX0 | AT91C_PA11_ECRS_ECRSDV |
+			  AT91C_PA10_ETX1 | AT91C_PA9_ETX0 | AT91C_PA8_ETXEN |
+			  AT91C_PA7_ETXCK_EREFCK;
+
+#ifdef CONFIG_AT91C_USE_RMII
+	*AT91C_PIOB_PDR = AT91C_PB19_ERXCK;
+	*AT91C_PIOB_BSR = AT91C_PB19_ERXCK;
+#else
+	*AT91C_PIOB_PDR = AT91C_PB19_ERXCK | AT91C_PB18_ECOL | AT91C_PB17_ERXDV |
+			  AT91C_PB16_ERX3 | AT91C_PB15_ERX2 | AT91C_PB14_ETXER |
+			  AT91C_PB13_ETX3 | AT91C_PB12_ETX2;
+
+	/* Select B Register */
+	*AT91C_PIOB_BSR = AT91C_PB19_ERXCK | AT91C_PB18_ECOL |
+			  AT91C_PB17_ERXDV | AT91C_PB16_ERX3 | AT91C_PB15_ERX2 |
+			  AT91C_PB14_ETXER | AT91C_PB13_ETX3 | AT91C_PB12_ETX2;
+#endif
+
+	*AT91C_PMC_PCER = 1 << AT91C_ID_EMAC;	/* Peripheral Clock Enable Register */
+
+	p_mac->EMAC_CFG |= AT91C_EMAC_CSR;	/* Clear statistics */
+
+	/* Init Ehternet buffers */
+	rbfdt = (rbf_t *) RBF_FRAMEBTD;
+	for (i = 0; i < RBF_FRAMEMAX; i++) {
+		rbfdt[i].addr = RBF_FRAMEBUF + RBF_FRAMELEN * i;
+		rbfdt[i].size = 0;
+	}
+	rbfdt[RBF_FRAMEMAX - 1].addr |= RBF_WRAP;
+	rbfp = &rbfdt[0];
+
+	p_mac->EMAC_SA2L = (bd->bi_enetaddr[3] << 24) | (bd->bi_enetaddr[2] << 16)
+			 | (bd->bi_enetaddr[1] <<  8) | (bd->bi_enetaddr[0]);
+	p_mac->EMAC_SA2H = (bd->bi_enetaddr[5] <<  8) | (bd->bi_enetaddr[4]);
+
+	p_mac->EMAC_RBQP = (long) (&rbfdt[0]);
+	p_mac->EMAC_RSR &= ~(AT91C_EMAC_RSR_OVR | AT91C_EMAC_REC | AT91C_EMAC_BNA);
+
+	p_mac->EMAC_CFG = (p_mac->EMAC_CFG | AT91C_EMAC_CAF | AT91C_EMAC_NBC)
+			& ~AT91C_EMAC_CLK;
+
+#ifdef CONFIG_AT91C_USE_RMII
+	p_mac->EMAC_CFG |= AT91C_EMAC_RMII;
+#endif
+
+#if (AT91C_MASTER_CLOCK > 40000000)
+	/* MDIO clock must not exceed 2.5 MHz, so enable MCK divider */
+	p_mac->EMAC_CFG |= AT91C_EMAC_CLK_HCLK_64;
+#endif
+
+	p_mac->EMAC_CTL |= AT91C_EMAC_TE | AT91C_EMAC_RE;
+
+	at91rm92000_GetPhyInterface (& PhyOps);
+
+	if (!PhyOps.IsPhyConnected (p_mac))
+		printf ("PHY not connected!!\n\r");
+
+	/* MII management start from here */
+	if (!(p_mac->EMAC_SR & AT91C_EMAC_LINK)) {
+		if (!(ret = PhyOps.Init (p_mac))) {
+			printf ("MAC: error during MII initialization\n");
+			return 0;
+		}
+	} else {
+		printf ("No link\n\r");
+		return 0;
+	}
+
+	return 0;
+}
+
+int eth_send (volatile void *packet, int length)
+{
+	while (!(p_mac->EMAC_TSR & AT91C_EMAC_BNQ));
+	p_mac->EMAC_TAR = (long) packet;
+	p_mac->EMAC_TCR = length;
+	while (p_mac->EMAC_TCR & 0x7ff);
+	p_mac->EMAC_TSR |= AT91C_EMAC_COMP;
+	return 0;
+}
+
+int eth_rx (void)
+{
+	int size;
+
+	if (!(rbfp->addr & RBF_OWNER))
+		return 0;
+
+	size = rbfp->size & RBF_SIZE;
+	NetReceive ((volatile uchar *) (rbfp->addr & RBF_ADDR), size);
+
+	rbfp->addr &= ~RBF_OWNER;
+	if (rbfp->addr & RBF_WRAP)
+		rbfp = &rbfdt[0];
+	else
+		rbfp++;
+
+	p_mac->EMAC_RSR |= AT91C_EMAC_REC;
+
+	return size;
+}
+
+void eth_halt (void)
+{
+};
+
+#if (CONFIG_COMMANDS & CFG_CMD_MII)
+int  miiphy_read(unsigned char addr, unsigned char reg, unsigned short * value)
+{
+	at91rm9200_EmacEnableMDIO (p_mac);
+	at91rm9200_EmacReadPhy (p_mac, reg, value);
+	at91rm9200_EmacDisableMDIO (p_mac);
+	return 0;
+}
+
+int  miiphy_write(unsigned char addr, unsigned char reg, unsigned short value)
+{
+	at91rm9200_EmacEnableMDIO (p_mac);
+	at91rm9200_EmacWritePhy (p_mac, reg, &value);
+	at91rm9200_EmacDisableMDIO (p_mac);
+	return 0;
+}
+#endif	/* CONFIG_COMMANDS & CFG_CMD_MII */
+
+#endif	/* CONFIG_COMMANDS & CFG_CMD_NET */
+
+#endif	/* CONFIG_DRIVER_ETHER */
diff --git a/cpu/arm920t/at91rm9200/i2c.c b/cpu/arm920t/at91rm9200/i2c.c
new file mode 100644
index 0000000000..433dd32a23
--- /dev/null
+++ b/cpu/arm920t/at91rm9200/i2c.c
@@ -0,0 +1,192 @@
+/*
+ *  i2c Support for Atmel's AT91RM9200 Two-Wire Interface
+ *
+ *  (c) Rick Bronson
+ *
+ *  Borrowed heavily from original work by:
+ *  Copyright (c) 2000 Philip Edelbrock <phil@stimpy.netroedge.com>
+ *
+ *  Modified to work with u-boot by (C) 2004 Gary Jennejohn garyj@denx.de
+ *
+ *  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>
+
+#ifdef CONFIG_HARD_I2C
+
+#include <i2c.h>
+#include <asm/io.h>
+#include <asm/arch/hardware.h>
+
+#include <at91rm9200_i2c.h>
+
+/* define DEBUG */
+
+/*
+ * Poll the i2c status register until the specified bit is set.
+ * Returns 0 if timed out (100 msec)
+ */
+static short at91_poll_status(AT91PS_TWI twi, unsigned long bit) {
+	int loop_cntr = 10000;
+	do {
+		udelay(10);
+	} while (!(twi->TWI_SR & bit) && (--loop_cntr > 0));
+
+	return (loop_cntr > 0);
+}
+
+/*
+ * Generic i2c master transfer entrypoint
+ *
+ * rw == 1 means that this is a read
+ */
+static int
+at91_xfer(unsigned char chip, unsigned int addr, int alen,
+						unsigned char *buffer, int len, int rw)
+{
+	AT91PS_TWI twi = (AT91PS_TWI) AT91_TWI_BASE;
+	int length;
+	unsigned char *buf;
+	/* Set the TWI Master Mode Register */
+	twi->TWI_MMR = (chip << 16) | (alen << 8)
+		| ((rw == 1) ? AT91C_TWI_MREAD : 0);
+
+	/* Set TWI Internal Address Register with first messages data field */
+	/* only one address byte is supported  */
+	if (alen > 0)
+		twi->TWI_IADR = addr & 0xff;
+
+	length = len;
+	buf = buffer;
+	if (length && buf) {	/* sanity check */
+		if (rw) {
+			twi->TWI_CR = AT91C_TWI_START;
+			while (length--) {
+				if (!length)
+					twi->TWI_CR = AT91C_TWI_STOP;
+				/* Wait until transfer is finished */
+				if (!at91_poll_status(twi, AT91C_TWI_RXRDY)) {
+					debug ("at91_i2c: timeout 1\n");
+					return 1;
+				}
+				*buf++ = twi->TWI_RHR;
+			}
+			if (!at91_poll_status(twi, AT91C_TWI_TXCOMP)) {
+				debug ("at91_i2c: timeout 2\n");
+				return 1;
+			}
+		} else {
+			twi->TWI_CR = AT91C_TWI_START;
+			while (length--) {
+				twi->TWI_THR = *buf++;
+				if (!length)
+					twi->TWI_CR = AT91C_TWI_STOP;
+				if (!at91_poll_status(twi, AT91C_TWI_TXRDY)) {
+					debug ("at91_i2c: timeout 3\n");
+					return 1;
+				}
+			}
+			/* Wait until transfer is finished */
+			if (!at91_poll_status(twi, AT91C_TWI_TXCOMP)) {
+				debug ("at91_i2c: timeout 4\n");
+				return 1;
+			}
+		}
+	}
+	return 0;
+}
+
+int
+i2c_probe(unsigned char chip)
+{
+	char buffer[1];
+
+	return at91_xfer(chip, 0, 0, buffer, 1, 1);
+}
+
+int
+i2c_read (unsigned char chip, unsigned int addr, int alen,
+	  unsigned char *buffer, int len)
+{
+#ifdef CFG_I2C_EEPROM_ADDR_OVERFLOW
+	/* we only allow one address byte */
+	if (alen > 1)
+		return 1;
+	/* XXX assume an ATMEL AT24C16 */
+	if (alen == 1) {
+#if 0 /* EEPROM code already sets this correctly */
+		chip |= (addr >> 8) & 0xff;
+#endif
+		addr = addr & 0xff;
+	}
+#endif
+	return at91_xfer(chip, addr, alen, buffer, len, 1);
+}
+
+int
+i2c_write(unsigned char chip, unsigned int addr, int alen,
+							unsigned char *buffer, int len)
+{
+	int i;
+	unsigned char *buf;
+
+#ifdef CFG_I2C_EEPROM_ADDR_OVERFLOW
+	/* we only allow one address byte */
+	if (alen > 1)
+		return 1;
+	/* XXX assume an ATMEL AT24C16 */
+	if (alen == 1) {
+		buf = buffer;
+		/* do single byte writes */
+		for (i = 0; i < len; i++) {
+#if 0 /* EEPROM code already sets this correctly */
+			chip |= (addr >> 8) & 0xff;
+#endif
+			addr = addr & 0xff;
+			if (at91_xfer(chip, addr, alen, buf++, 1, 0))
+				return 1;
+			addr++;
+		}
+		return 0;
+	}
+#endif
+	return at91_xfer(chip, addr, alen, buffer, len, 0);
+}
+
+/*
+ * Main initialization routine
+ */
+void
+i2c_init(int speed, int slaveaddr)
+{
+	AT91PS_TWI twi = (AT91PS_TWI) AT91_TWI_BASE;
+
+	*AT91C_PIOA_PDR = AT91C_PA25_TWD | AT91C_PA26_TWCK;
+	*AT91C_PIOA_ASR = AT91C_PA25_TWD | AT91C_PA26_TWCK;
+	*AT91C_PIOA_MDER = AT91C_PA25_TWD | AT91C_PA26_TWCK;
+	*AT91C_PMC_PCER = 1 << AT91C_ID_TWI;		/* enable peripheral clock */
+
+	twi->TWI_IDR = 0x3ff;				/* Disable all interrupts */
+	twi->TWI_CR = AT91C_TWI_SWRST;			/* Reset peripheral */
+	twi->TWI_CR = AT91C_TWI_MSEN | AT91C_TWI_SVDIS;	/* Set Master mode */
+
+	/* Here, CKDIV = 1 and CHDIV=CLDIV  ==> CLDIV = CHDIV = 1/4*((Fmclk/FTWI) -6) */
+	twi->TWI_CWGR = AT91C_TWI_CKDIV1 | AT91C_TWI_CLDIV3 | (AT91C_TWI_CLDIV3 << 8);
+
+	debug ("Found AT91 i2c\n");
+	return;
+}
+#endif /* CONFIG_HARD_I2C */
diff --git a/cpu/arm920t/at91rm9200/interrupts.c b/cpu/arm920t/at91rm9200/interrupts.c
new file mode 100644
index 0000000000..10546027f8
--- /dev/null
+++ b/cpu/arm920t/at91rm9200/interrupts.c
@@ -0,0 +1,210 @@
+/*
+ * (C) Copyright 2002
+ * Lineo, Inc. <www.lineo.com>
+ * Bernhard Kuhn <bkuhn@lineo.com>
+ *
+ * (C) Copyright 2002
+ * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
+ * Marius Groeger <mgroeger@sysgo.de>
+ *
+ * (C) Copyright 2002
+ * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
+ * Alex Zuepke <azu@sysgo.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 <common.h>
+/*#include <asm/io.h>*/
+#include <asm/arch/hardware.h>
+/*#include <asm/proc/ptrace.h>*/
+
+/* the number of clocks per CFG_HZ */
+#define TIMER_LOAD_VAL (CFG_HZ_CLOCK/CFG_HZ)
+
+/* macro to read the 16 bit timer */
+#define READ_TIMER (tmr->TC_CV & 0x0000ffff)
+AT91PS_TC tmr;
+
+static ulong timestamp;
+static ulong lastinc;
+
+int interrupt_init (void)
+{
+	tmr = AT91C_BASE_TC0;
+
+	/* enables TC1.0 clock */
+	*AT91C_PMC_PCER = 1 << AT91C_ID_TC0;  /* enable clock */
+
+	*AT91C_TCB0_BCR = 0;
+	*AT91C_TCB0_BMR = AT91C_TCB_TC0XC0S_NONE | AT91C_TCB_TC1XC1S_NONE | AT91C_TCB_TC2XC2S_NONE;
+	tmr->TC_CCR = AT91C_TC_CLKDIS;
+#define AT91C_TC_CMR_CPCTRG (1 << 14)
+	/* set to MCLK/2 and restart the timer when the vlaue in TC_RC is reached */
+	tmr->TC_CMR = AT91C_TC_TIMER_DIV1_CLOCK | AT91C_TC_CMR_CPCTRG;
+
+	tmr->TC_IDR = ~0ul;
+	tmr->TC_RC = TIMER_LOAD_VAL;
+	lastinc = 0;
+	tmr->TC_CCR = AT91C_TC_SWTRG | AT91C_TC_CLKEN;
+	timestamp = 0;
+
+	return (0);
+}
+
+/*
+ * timer without interrupts
+ */
+
+void reset_timer (void)
+{
+	reset_timer_masked ();
+}
+
+ulong get_timer (ulong base)
+{
+	return get_timer_masked () - base;
+}
+
+void set_timer (ulong t)
+{
+	timestamp = t;
+}
+
+void udelay (unsigned long usec)
+{
+	udelay_masked(usec);
+}
+
+void reset_timer_masked (void)
+{
+	/* reset time */
+	lastinc = READ_TIMER;
+	timestamp = 0;
+}
+
+ulong get_timer_raw (void)
+{
+	ulong now = READ_TIMER;
+
+	if (now >= lastinc) {
+		/* normal mode */
+		timestamp += now - lastinc;
+	} else {
+		/* we have an overflow ... */
+		timestamp += now + TIMER_LOAD_VAL - lastinc;
+	}
+	lastinc = now;
+
+	return timestamp;
+}
+
+ulong get_timer_masked (void)
+{
+	return get_timer_raw()/TIMER_LOAD_VAL;
+}
+
+void udelay_masked (unsigned long usec)
+{
+	ulong tmo;
+	ulong endtime;
+	signed long diff;
+
+	tmo = CFG_HZ_CLOCK / 1000;
+	tmo *= usec;
+	tmo /= 1000;
+
+	endtime = get_timer_raw () + tmo;
+
+	do {
+		ulong now = get_timer_raw ();
+		diff = endtime - now;
+	} while (diff >= 0);
+}
+
+/*
+ * This function is derived from PowerPC code (read timebase as long long).
+ * On ARM it just returns the timer value.
+ */
+unsigned long long get_ticks(void)
+{
+	return get_timer(0);
+}
+
+/*
+ * This function is derived from PowerPC code (timebase clock frequency).
+ * On ARM it returns the number of timer ticks per second.
+ */
+ulong get_tbclk (void)
+{
+	ulong tbclk;
+
+	tbclk = CFG_HZ;
+	return tbclk;
+}
+
+/*
+ * Reset the cpu by setting up the watchdog timer and let him time out
+ * or toggle a GPIO pin on the AT91RM9200DK board
+ */
+void reset_cpu (ulong ignored)
+{
+
+#ifdef CONFIG_DBGU
+	AT91PS_USART us = (AT91PS_USART) AT91C_BASE_DBGU;
+#endif
+#ifdef CONFIG_USART0
+	AT91PS_USART us = AT91C_BASE_US0;
+#endif
+#ifdef CONFIG_USART1
+	AT91PS_USART us = AT91C_BASE_US1;
+#endif
+#ifdef CONFIG_AT91RM9200DK
+	AT91PS_PIO pio = AT91C_BASE_PIOA;
+#endif
+
+	/*shutdown the console to avoid strange chars during reset */
+	us->US_CR = (AT91C_US_RSTRX | AT91C_US_RSTTX);
+
+#ifdef CONFIG_AT91RM9200DK
+	/* Clear PA19 to trigger the hard reset */
+	pio->PIO_CODR = 0x00080000;
+	pio->PIO_OER  = 0x00080000;
+	pio->PIO_PER  = 0x00080000;
+#endif
+
+	/* this is the way Linux does it */
+
+	/* FIXME:
+	 * These defines should be moved into
+	 * include/asm-arm/arch-at91rm9200/AT91RM9200.h
+	 * as soon as the whitespace fix gets applied.
+	 */
+	#define AT91C_ST_RSTEN (0x1 << 16)
+	#define AT91C_ST_EXTEN (0x1 << 17)
+	#define AT91C_ST_WDRST (0x1 <<  0)
+	#define ST_WDMR *((unsigned long *)0xfffffd08)	/* watchdog mode register */
+	#define ST_CR *((unsigned long *)0xfffffd00)	/* system clock control register */
+
+	ST_WDMR = AT91C_ST_RSTEN | AT91C_ST_EXTEN | 1 ;
+	ST_CR = AT91C_ST_WDRST;
+
+	while (1);
+	/* Never reached */
+}
diff --git a/cpu/arm920t/at91rm9200/lowlevel_init.S b/cpu/arm920t/at91rm9200/lowlevel_init.S
new file mode 100644
index 0000000000..05887adc0c
--- /dev/null
+++ b/cpu/arm920t/at91rm9200/lowlevel_init.S
@@ -0,0 +1,200 @@
+/*
+ * Memory Setup stuff - taken from blob memsetup.S
+ *
+ * Copyright (C) 1999 2000 2001 Erik Mouw (J.A.K.Mouw@its.tudelft.nl) and
+ *		       Jan-Derk Bakker (J.D.Bakker@its.tudelft.nl)
+ *
+ * Modified for the at91rm9200dk board by
+ * (C) Copyright 2004
+ * Gary Jennejohn, DENX Software Engineering, <garyj@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
+ */
+
+#include <config.h>
+#include <version.h>
+
+#ifndef CONFIG_SKIP_LOWLEVEL_INIT
+/*
+ * some parameters for the board
+ *
+ * This is based on rm9200dk.cfg for the BDI2000 from ABATRON which in
+ * turn is based on the boot.bin code from ATMEL
+ *
+ */
+
+/* flash */
+#define MC_PUIA		0xFFFFFF10
+#define MC_PUP		0xFFFFFF50
+#define MC_PUER		0xFFFFFF54
+#define MC_ASR		0xFFFFFF04
+#define MC_AASR		0xFFFFFF08
+#define EBI_CFGR	0xFFFFFF64
+#define SMC2_CSR	0xFFFFFF70
+
+/* clocks */
+#define PLLAR		0xFFFFFC28
+#define PLLBR		0xFFFFFC2C
+#define MCKR		0xFFFFFC30
+
+#define AT91C_BASE_CKGR 0xFFFFFC20
+#define CKGR_MOR 0
+
+/* sdram */
+#define PIOC_ASR	0xFFFFF870
+#define PIOC_BSR	0xFFFFF874
+#define PIOC_PDR	0xFFFFF804
+#define EBI_CSA		0xFFFFFF60
+#define SDRC_CR		0xFFFFFF98
+#define SDRC_MR		0xFFFFFF90
+#define SDRC_TR		0xFFFFFF94
+
+
+_MTEXT_BASE:
+#undef START_FROM_MEM
+#ifdef START_FROM_MEM
+	.word	TEXT_BASE-PHYS_FLASH_1
+#else
+	.word	TEXT_BASE
+#endif
+
+.globl lowlevel_init
+lowlevel_init:
+	/* Get the CKGR Base Address */
+	ldr     r1, =AT91C_BASE_CKGR
+	/* Main oscillator Enable register */
+#ifdef CFG_USE_MAIN_OSCILLATOR
+	ldr     r0, =0x0000FF01		/* Enable main oscillator,  OSCOUNT = 0xFF */
+#else
+	ldr     r0, =0x0000FF00		/* Disable main oscillator, OSCOUNT = 0xFF */
+#endif
+	str     r0, [r1, #CKGR_MOR]
+	/* Add loop to compensate Main Oscillator startup time */
+	ldr     r0, =0x00000010
+LoopOsc:
+	subs    r0, r0, #1
+	bhi     LoopOsc
+
+	/* memory control configuration */
+	/* this isn't very elegant, but	 what the heck */
+	ldr	r0, =SMRDATA
+	ldr	r1, _MTEXT_BASE
+	sub	r0, r0, r1
+	add	r2, r0, #80
+0:
+	/* the address */
+	ldr	r1, [r0], #4
+	/* the value */
+	ldr	r3, [r0], #4
+	str	r3, [r1]
+	cmp	r2, r0
+	bne	0b
+	/* delay - this is all done by guess */
+	ldr	r0, =0x00010000
+1:
+	subs	r0, r0, #1
+	bhi	1b
+	ldr	r0, =SMRDATA1
+	ldr	r1, _MTEXT_BASE
+	sub	r0, r0, r1
+	add	r2, r0, #176
+2:
+	/* the address */
+	ldr	r1, [r0], #4
+	/* the value */
+	ldr	r3, [r0], #4
+	str	r3, [r1]
+	cmp	r2, r0
+	bne	2b
+
+	/* everything is fine now */
+	mov	pc, lr
+
+	.ltorg
+
+SMRDATA:
+	.word MC_PUIA
+	.word MC_PUIA_VAL
+	.word MC_PUP
+	.word MC_PUP_VAL
+	.word MC_PUER
+	.word MC_PUER_VAL
+	.word MC_ASR
+	.word MC_ASR_VAL
+	.word MC_AASR
+	.word MC_AASR_VAL
+	.word EBI_CFGR
+	.word EBI_CFGR_VAL
+	.word SMC2_CSR
+	.word SMC2_CSR_VAL
+	.word PLLAR
+	.word PLLAR_VAL
+	.word PLLBR
+	.word PLLBR_VAL
+	.word MCKR
+	.word MCKR_VAL
+	/* SMRDATA is 80 bytes long */
+	/* here there's a delay of 100 */
+SMRDATA1:
+	.word PIOC_ASR
+	.word PIOC_ASR_VAL
+	.word PIOC_BSR
+	.word PIOC_BSR_VAL
+	.word PIOC_PDR
+	.word PIOC_PDR_VAL
+	.word EBI_CSA
+	.word EBI_CSA_VAL
+	.word SDRC_CR
+	.word SDRC_CR_VAL
+	.word SDRC_MR
+	.word SDRC_MR_VAL
+	.word SDRAM
+	.word SDRAM_VAL
+	.word SDRC_MR
+	.word SDRC_MR_VAL1
+	.word SDRAM
+	.word SDRAM_VAL
+	.word SDRAM
+	.word SDRAM_VAL
+	.word SDRAM
+	.word SDRAM_VAL
+	.word SDRAM
+	.word SDRAM_VAL
+	.word SDRAM
+	.word SDRAM_VAL
+	.word SDRAM
+	.word SDRAM_VAL
+	.word SDRAM
+	.word SDRAM_VAL
+	.word SDRAM
+	.word SDRAM_VAL
+	.word SDRC_MR
+	.word SDRC_MR_VAL2
+	.word SDRAM1
+	.word SDRAM_VAL
+	.word SDRC_TR
+	.word SDRC_TR_VAL
+	.word SDRAM
+	.word SDRAM_VAL
+	.word SDRC_MR
+	.word SDRC_MR_VAL3
+	.word SDRAM
+	.word SDRAM_VAL
+	/* SMRDATA1 is 176 bytes long */
+#endif /* CONFIG_SKIP_LOWLEVEL_INIT */
diff --git a/cpu/arm920t/at91rm9200/serial.c b/cpu/arm920t/at91rm9200/serial.c
new file mode 100644
index 0000000000..a9693bf44e
--- /dev/null
+++ b/cpu/arm920t/at91rm9200/serial.c
@@ -0,0 +1,115 @@
+/*
+ * (C) Copyright 2002
+ * Lineo, Inc <www.lineo.com>
+ * Bernhard Kuhn <bkuhn@lineo.com>
+ *
+ * (C) Copyright 2002
+ * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
+ * Marius Groeger <mgroeger@sysgo.de>
+ *
+ * (C) Copyright 2002
+ * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
+ * Alex Zuepke <azu@sysgo.de>
+ *
+ * Copyright (C) 1999 2000 2001 Erik Mouw (J.A.K.Mouw@its.tudelft.nl)
+ *
+ * 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 <common.h>
+#include <asm/io.h>
+#include <asm/arch/hardware.h>
+
+#if !defined(CONFIG_DBGU) && !defined(CONFIG_USART0) && !defined(CONFIG_USART1)
+#error must define one of CONFIG_DBGU or CONFIG_USART0 or CONFIG_USART1
+#endif
+
+/* ggi thunder */
+#ifdef CONFIG_DBGU
+AT91PS_USART us = (AT91PS_USART) AT91C_BASE_DBGU;
+#endif
+#ifdef CONFIG_USART0
+AT91PS_USART us = (AT91PS_USART) AT91C_BASE_US0;
+#endif
+#ifdef CONFIG_USART1
+AT91PS_USART us = (AT91PS_USART) AT91C_BASE_US1;
+#endif
+
+void serial_setbrg (void)
+{
+	DECLARE_GLOBAL_DATA_PTR;
+	int baudrate;
+
+	if ((baudrate = gd->baudrate) <= 0)
+		baudrate = CONFIG_BAUDRATE;
+	if (baudrate == 0 || baudrate == CONFIG_BAUDRATE)
+		us->US_BRGR = CFG_AT91C_BRGR_DIVISOR;	/* hardcode so no __divsi3 */
+	else
+		/* MASTER_CLOCK/(16 * baudrate) */
+		us->US_BRGR = (AT91C_MASTER_CLOCK >> 4)/baudrate;
+}
+
+int serial_init (void)
+{
+	/* make any port initializations specific to this port */
+#ifdef CONFIG_DBGU
+	*AT91C_PIOA_PDR = AT91C_PA31_DTXD | AT91C_PA30_DRXD;	/* PA 31 & 30 */
+	*AT91C_PMC_PCER = 1 << AT91C_ID_SYS;	/* enable clock */
+#endif
+#ifdef CONFIG_USART0
+	*AT91C_PIOA_PDR = AT91C_PA17_TXD0 | AT91C_PA18_RXD0;
+	*AT91C_PMC_PCER |= 1 << AT91C_ID_USART0;	/* enable clock */
+#endif
+#ifdef CONFIG_USART1
+	*AT91C_PIOB_PDR = AT91C_PB21_TXD1 | AT91C_PB20_RXD1;
+	*AT91C_PMC_PCER |= 1 << AT91C_ID_USART1;	/* enable clock */
+#endif
+	serial_setbrg ();
+
+	us->US_CR = AT91C_US_RSTRX | AT91C_US_RSTTX;
+	us->US_CR = AT91C_US_RXEN | AT91C_US_TXEN;
+	us->US_MR =
+		(AT91C_US_CLKS_CLOCK | AT91C_US_CHRL_8_BITS |
+		 AT91C_US_PAR_NONE | AT91C_US_NBSTOP_1_BIT);
+	us->US_IMR = ~0ul;
+	return (0);
+}
+
+void serial_putc (const char c)
+{
+	if (c == '\n')
+		serial_putc ('\r');
+	while ((us->US_CSR & AT91C_US_TXRDY) == 0);
+	us->US_THR = c;
+}
+
+void serial_puts (const char *s)
+{
+	while (*s) {
+		serial_putc (*s++);
+	}
+}
+
+int serial_getc (void)
+{
+	while ((us->US_CSR & AT91C_US_RXRDY) == 0);
+	return us->US_RHR;
+}
+
+int serial_tstc (void)
+{
+	return ((us->US_CSR & AT91C_US_RXRDY) == AT91C_US_RXRDY);
+}