[U-Boot] [PATCH v5 3/3] mx28evk: Add initial support for MX28EVK board

[Fabio Estevam <festevam@gmail.com>]

Add initial support for Freescale MX28EVK board.

Tested boot via SD card and by loading a kernel via TFTP through
the FEC interface.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
---
- For correct operation of saving environment variables into the SD card,
the following patch is needed:
http://lists.denx.de/pipermail/u-boot/2011-November/111448.html

Changes since v4:
- No changes
Changes since v3:
- Fix Copyright in mx28evk.h
- Call mx28_dram_init from dram_init
Changes since v2:
- Generate the patch again due to error in applying unrelated changes
Changes since v1:
- Read the MAC from fuses
- Use tabs instead of space in u-boot.bd
- Use puts instead of print
- Factor out mac reading function
- Factor out ddr size calculation function
- Use GENERATED_GBL_DATA_SIZE
- Protect CONFIG_ENV_IS_IN_MMC
 MAINTAINERS                       |    1 +
 board/freescale/mx28evk/Makefile  |   49 ++++++++++
 board/freescale/mx28evk/iomux.c   |  138 +++++++++++++++++++++++++++++
 board/freescale/mx28evk/mx28evk.c |  170 +++++++++++++++++++++++++++++++++++
 board/freescale/mx28evk/u-boot.bd |   14 +++
 boards.cfg                        |    1 +
 include/configs/mx28evk.h         |  176 +++++++++++++++++++++++++++++++++++++
 7 files changed, 549 insertions(+), 0 deletions(-)
 create mode 100644 board/freescale/mx28evk/Makefile
 create mode 100644 board/freescale/mx28evk/iomux.c
 create mode 100644 board/freescale/mx28evk/mx28evk.c
 create mode 100644 board/freescale/mx28evk/u-boot.bd
 create mode 100644 include/configs/mx28evk.h

diff --git a/MAINTAINERS b/MAINTAINERS
index a56ca10..72e1089 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -639,6 +639,7 @@ Kristoffer Ericson <kristoffer.ericson@gmail.com>
 Fabio Estevam <fabio.estevam@freescale.com>
 
 	mx25pdk		i.MX25
+	mx28evk		i.MX28
 	mx31pdk		i.MX31
 	mx53ard		i.MX53
 	mx53smd		i.MX53
diff --git a/board/freescale/mx28evk/Makefile b/board/freescale/mx28evk/Makefile
new file mode 100644
index 0000000..7459107
--- /dev/null
+++ b/board/freescale/mx28evk/Makefile
@@ -0,0 +1,49 @@
+#
+# (C) Copyright 2000-2006
+# Wolfgang Denk, DENX Software Engineering, wd at 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	= $(obj)lib$(BOARD).o
+
+ifndef	CONFIG_SPL_BUILD
+COBJS	:= mx28evk.o
+else
+COBJS	:= iomux.o
+endif
+
+SRCS	:= $(COBJS:.o=.c)
+OBJS	:= $(addprefix $(obj),$(COBJS))
+
+$(LIB):	$(obj).depend $(OBJS)
+	$(call cmd_link_o_target, $(OBJS))
+
+all:	$(ALL)
+
+#########################################################################
+
+# defines $(obj).depend target
+include $(SRCTREE)/rules.mk
+
+sinclude $(obj).depend
+
+#########################################################################
diff --git a/board/freescale/mx28evk/iomux.c b/board/freescale/mx28evk/iomux.c
new file mode 100644
index 0000000..904e3f3
--- /dev/null
+++ b/board/freescale/mx28evk/iomux.c
@@ -0,0 +1,138 @@
+/*
+ * Freescale MX28EVK IOMUX setup
+ *
+ * Copyright (C) 2011 Marek Vasut <marek.vasut@gmail.com>
+ * on behalf of DENX Software Engineering GmbH
+ *
+ * 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.
+ */
+
+#include <common.h>
+#include <config.h>
+#include <asm/io.h>
+#include <asm/arch/iomux-mx28.h>
+#include <asm/arch/imx-regs.h>
+#include <asm/arch/sys_proto.h>
+
+#define	MUX_CONFIG_SSP0	(MXS_PAD_3V3 | MXS_PAD_8MA | MXS_PAD_PULLUP)
+#define	MUX_CONFIG_ENET	(MXS_PAD_3V3 | MXS_PAD_8MA | MXS_PAD_PULLUP)
+#define	MUX_CONFIG_EMI	(MXS_PAD_3V3 | MXS_PAD_12MA | MXS_PAD_NOPULL)
+
+const iomux_cfg_t iomux_setup[] = {
+	/* DUART */
+	MX28_PAD_PWM0__DUART_RX,
+	MX28_PAD_PWM1__DUART_TX,
+
+	/* MMC0 */
+	MX28_PAD_SSP0_DATA0__SSP0_D0 | MUX_CONFIG_SSP0,
+	MX28_PAD_SSP0_DATA1__SSP0_D1 | MUX_CONFIG_SSP0,
+	MX28_PAD_SSP0_DATA2__SSP0_D2 | MUX_CONFIG_SSP0,
+	MX28_PAD_SSP0_DATA3__SSP0_D3 | MUX_CONFIG_SSP0,
+	MX28_PAD_SSP0_DATA4__SSP0_D4 | MUX_CONFIG_SSP0,
+	MX28_PAD_SSP0_DATA5__SSP0_D5 | MUX_CONFIG_SSP0,
+	MX28_PAD_SSP0_DATA6__SSP0_D6 | MUX_CONFIG_SSP0,
+	MX28_PAD_SSP0_DATA7__SSP0_D7 | MUX_CONFIG_SSP0,
+	MX28_PAD_SSP0_CMD__SSP0_CMD | MUX_CONFIG_SSP0,
+	MX28_PAD_SSP0_DETECT__SSP0_CARD_DETECT |
+		(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_NOPULL),
+	MX28_PAD_SSP0_SCK__SSP0_SCK |
+		(MXS_PAD_12MA | MXS_PAD_3V3 | MXS_PAD_NOPULL),
+	/* write protect */
+	MX28_PAD_SSP1_SCK__GPIO_2_12,
+	/* MMC0 slot power enable */
+	MX28_PAD_PWM3__GPIO_3_28 |
+		(MXS_PAD_12MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
+
+	/* FEC0 */
+	MX28_PAD_ENET0_MDC__ENET0_MDC | MUX_CONFIG_ENET,
+	MX28_PAD_ENET0_MDIO__ENET0_MDIO | MUX_CONFIG_ENET,
+	MX28_PAD_ENET0_RX_EN__ENET0_RX_EN | MUX_CONFIG_ENET,
+	MX28_PAD_ENET0_TX_EN__ENET0_TX_EN | MUX_CONFIG_ENET,
+	MX28_PAD_ENET0_RXD0__ENET0_RXD0 | MUX_CONFIG_ENET,
+	MX28_PAD_ENET0_RXD1__ENET0_RXD1 | MUX_CONFIG_ENET,
+	MX28_PAD_ENET0_TXD0__ENET0_TXD0 | MUX_CONFIG_ENET,
+	MX28_PAD_ENET0_TXD1__ENET0_TXD1 | MUX_CONFIG_ENET,
+	MX28_PAD_ENET_CLK__CLKCTRL_ENET | MUX_CONFIG_ENET,
+	/* FEC0 Enable */
+	MX28_PAD_SSP1_DATA3__GPIO_2_15 |
+		(MXS_PAD_12MA | MXS_PAD_3V3),
+	/* FEC0 Reset */
+	MX28_PAD_ENET0_RX_CLK__GPIO_4_13 |
+		(MXS_PAD_12MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
+
+	/* FEC1 */
+	MX28_PAD_ENET0_COL__ENET1_TX_EN | MUX_CONFIG_ENET,
+	MX28_PAD_ENET0_CRS__ENET1_RX_EN | MUX_CONFIG_ENET,
+	MX28_PAD_ENET0_RXD2__ENET1_RXD0 | MUX_CONFIG_ENET,
+	MX28_PAD_ENET0_RXD3__ENET1_RXD1 | MUX_CONFIG_ENET,
+	MX28_PAD_ENET0_TXD2__ENET1_TXD0 | MUX_CONFIG_ENET,
+	MX28_PAD_ENET0_TXD3__ENET1_TXD1 | MUX_CONFIG_ENET,
+
+	/* EMI */
+	MX28_PAD_EMI_D00__EMI_DATA0 | MUX_CONFIG_EMI,
+	MX28_PAD_EMI_D01__EMI_DATA1 | MUX_CONFIG_EMI,
+	MX28_PAD_EMI_D02__EMI_DATA2 | MUX_CONFIG_EMI,
+	MX28_PAD_EMI_D03__EMI_DATA3 | MUX_CONFIG_EMI,
+	MX28_PAD_EMI_D04__EMI_DATA4 | MUX_CONFIG_EMI,
+	MX28_PAD_EMI_D05__EMI_DATA5 | MUX_CONFIG_EMI,
+	MX28_PAD_EMI_D06__EMI_DATA6 | MUX_CONFIG_EMI,
+	MX28_PAD_EMI_D07__EMI_DATA7 | MUX_CONFIG_EMI,
+	MX28_PAD_EMI_D08__EMI_DATA8 | MUX_CONFIG_EMI,
+	MX28_PAD_EMI_D09__EMI_DATA9 | MUX_CONFIG_EMI,
+	MX28_PAD_EMI_D10__EMI_DATA10 | MUX_CONFIG_EMI,
+	MX28_PAD_EMI_D11__EMI_DATA11 | MUX_CONFIG_EMI,
+	MX28_PAD_EMI_D12__EMI_DATA12 | MUX_CONFIG_EMI,
+	MX28_PAD_EMI_D13__EMI_DATA13 | MUX_CONFIG_EMI,
+	MX28_PAD_EMI_D14__EMI_DATA14 | MUX_CONFIG_EMI,
+	MX28_PAD_EMI_D15__EMI_DATA15 | MUX_CONFIG_EMI,
+	MX28_PAD_EMI_ODT0__EMI_ODT0 | MUX_CONFIG_EMI,
+	MX28_PAD_EMI_DQM0__EMI_DQM0 | MUX_CONFIG_EMI,
+	MX28_PAD_EMI_ODT1__EMI_ODT1 | MUX_CONFIG_EMI,
+	MX28_PAD_EMI_DQM1__EMI_DQM1 | MUX_CONFIG_EMI,
+	MX28_PAD_EMI_DDR_OPEN_FB__EMI_DDR_OPEN_FEEDBACK | MUX_CONFIG_EMI,
+	MX28_PAD_EMI_CLK__EMI_CLK | MUX_CONFIG_EMI,
+	MX28_PAD_EMI_DQS0__EMI_DQS0 | MUX_CONFIG_EMI,
+	MX28_PAD_EMI_DQS1__EMI_DQS1 | MUX_CONFIG_EMI,
+	MX28_PAD_EMI_DDR_OPEN__EMI_DDR_OPEN | MUX_CONFIG_EMI,
+
+	MX28_PAD_EMI_A00__EMI_ADDR0 | MUX_CONFIG_EMI,
+	MX28_PAD_EMI_A01__EMI_ADDR1 | MUX_CONFIG_EMI,
+	MX28_PAD_EMI_A02__EMI_ADDR2 | MUX_CONFIG_EMI,
+	MX28_PAD_EMI_A03__EMI_ADDR3 | MUX_CONFIG_EMI,
+	MX28_PAD_EMI_A04__EMI_ADDR4 | MUX_CONFIG_EMI,
+	MX28_PAD_EMI_A05__EMI_ADDR5 | MUX_CONFIG_EMI,
+	MX28_PAD_EMI_A06__EMI_ADDR6 | MUX_CONFIG_EMI,
+	MX28_PAD_EMI_A07__EMI_ADDR7 | MUX_CONFIG_EMI,
+	MX28_PAD_EMI_A08__EMI_ADDR8 | MUX_CONFIG_EMI,
+	MX28_PAD_EMI_A09__EMI_ADDR9 | MUX_CONFIG_EMI,
+	MX28_PAD_EMI_A10__EMI_ADDR10 | MUX_CONFIG_EMI,
+	MX28_PAD_EMI_A11__EMI_ADDR11 | MUX_CONFIG_EMI,
+	MX28_PAD_EMI_A12__EMI_ADDR12 | MUX_CONFIG_EMI,
+	MX28_PAD_EMI_A13__EMI_ADDR13 | MUX_CONFIG_EMI,
+	MX28_PAD_EMI_A14__EMI_ADDR14 | MUX_CONFIG_EMI,
+	MX28_PAD_EMI_BA0__EMI_BA0 | MUX_CONFIG_EMI,
+	MX28_PAD_EMI_BA1__EMI_BA1 | MUX_CONFIG_EMI,
+	MX28_PAD_EMI_BA2__EMI_BA2 | MUX_CONFIG_EMI,
+	MX28_PAD_EMI_CASN__EMI_CASN | MUX_CONFIG_EMI,
+	MX28_PAD_EMI_RASN__EMI_RASN | MUX_CONFIG_EMI,
+	MX28_PAD_EMI_WEN__EMI_WEN | MUX_CONFIG_EMI,
+	MX28_PAD_EMI_CE0N__EMI_CE0N | MUX_CONFIG_EMI,
+	MX28_PAD_EMI_CE1N__EMI_CE1N | MUX_CONFIG_EMI,
+	MX28_PAD_EMI_CKE__EMI_CKE | MUX_CONFIG_EMI,
+};
+
+void board_init_ll(void)
+{
+	mx28_common_spl_init(iomux_setup, ARRAY_SIZE(iomux_setup));
+}
diff --git a/board/freescale/mx28evk/mx28evk.c b/board/freescale/mx28evk/mx28evk.c
new file mode 100644
index 0000000..542e806
--- /dev/null
+++ b/board/freescale/mx28evk/mx28evk.c
@@ -0,0 +1,170 @@
+/*
+ * Freescale MX28EVK board
+ *
+ * (C) Copyright 2011 Freescale Semiconductor, Inc.
+ *
+ * Author: Fabio Estevam <fabio.estevam@freescale.com>
+ *
+ * Based on m28evk.c:
+ * Copyright (C) 2011 Marek Vasut <marek.vasut@gmail.com>
+ * on behalf of DENX Software Engineering GmbH
+ *
+ * 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.
+ */
+
+#include <common.h>
+#include <asm/gpio.h>
+#include <asm/io.h>
+#include <asm/arch/imx-regs.h>
+#include <asm/arch/iomux-mx28.h>
+#include <asm/arch/clock.h>
+#include <asm/arch/sys_proto.h>
+#include <linux/mii.h>
+#include <miiphy.h>
+#include <netdev.h>
+#include <errno.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+/*
+ * Functions
+ */
+int board_early_init_f(void)
+{
+	/* IO0 clock at 480MHz */
+	mx28_set_ioclk(MXC_IOCLK0, 480000);
+	/* IO1 clock at 480MHz */
+	mx28_set_ioclk(MXC_IOCLK1, 480000);
+
+	/* SSP0 clock at 96MHz */
+	mx28_set_sspclk(MXC_SSPCLK0, 96000, 0);
+	/* SSP2 clock at 96MHz */
+	mx28_set_sspclk(MXC_SSPCLK2, 96000, 0);
+
+	return 0;
+}
+
+int dram_init(void)
+{
+	mx28_dram_init();
+	return 0;
+}
+
+int board_init(void)
+{
+	/* Adress of boot parameters */
+	gd->bd->bi_boot_params = PHYS_SDRAM_1 + 0x100;
+
+	return 0;
+}
+
+#ifdef	CONFIG_CMD_MMC
+static int mx28evk_mmc_wp(int id)
+{
+	if (id != 0) {
+		printf("MXS MMC: Invalid card selected (card id = %d)\n", id);
+		return 1;
+	}
+
+	return gpio_get_value(MX28_PAD_SSP1_SCK__GPIO_2_12);
+}
+
+int board_mmc_init(bd_t *bis)
+{
+	/* Configure WP as input */
+	gpio_direction_input(MX28_PAD_SSP1_SCK__GPIO_2_12);
+
+	/* Configure MMC0 Power Enable */
+	gpio_direction_output(MX28_PAD_PWM3__GPIO_3_28, 0);
+
+	return mxsmmc_initialize(bis, 0, mx28evk_mmc_wp);
+}
+#endif
+
+#ifdef	CONFIG_CMD_NET
+
+#define	MII_OPMODE_STRAP_OVERRIDE	0x16
+#define	MII_PHY_CTRL1			0x1e
+#define	MII_PHY_CTRL2			0x1f
+
+int fecmxc_mii_postcall(int phy)
+{
+	miiphy_write("FEC1", phy, MII_BMCR, 0x9000);
+	miiphy_write("FEC1", phy, MII_OPMODE_STRAP_OVERRIDE, 0x0202);
+	if (phy == 3)
+		miiphy_write("FEC1", 3, MII_PHY_CTRL2, 0x8180);
+	return 0;
+}
+
+int board_eth_init(bd_t *bis)
+{
+	struct mx28_clkctrl_regs *clkctrl_regs =
+		(struct mx28_clkctrl_regs *)MXS_CLKCTRL_BASE;
+	struct eth_device *dev;
+	int ret;
+
+	ret = cpu_eth_init(bis);
+
+	/* MX28EVK uses ENET_CLK PAD to drive FEC clock */
+	writel(CLKCTRL_ENET_TIME_SEL_RMII_CLK | CLKCTRL_ENET_CLK_OUT_EN,
+					&clkctrl_regs->hw_clkctrl_enet);
+
+	/* Power-on FECs */
+	gpio_direction_output(MX28_PAD_SSP1_DATA3__GPIO_2_15, 0);
+
+	/* Reset FEC PHYs */
+	gpio_direction_output(MX28_PAD_ENET0_RX_CLK__GPIO_4_13, 0);
+	udelay(200);
+	gpio_set_value(MX28_PAD_ENET0_RX_CLK__GPIO_4_13, 1);
+
+	ret = fecmxc_initialize_multi(bis, 0, 0, MXS_ENET0_BASE);
+	if (ret) {
+		puts("FEC MXS: Unable to init FEC0\n");
+		return ret;
+	}
+
+	ret = fecmxc_initialize_multi(bis, 1, 3, MXS_ENET1_BASE);
+	if (ret) {
+		puts("FEC MXS: Unable to init FEC1\n");
+		return ret;
+	}
+
+	dev = eth_get_dev_by_name("FEC0");
+	if (!dev) {
+		puts("FEC MXS: Unable to get FEC0 device entry\n");
+		return -EINVAL;
+	}
+
+	ret = fecmxc_register_mii_postcall(dev, fecmxc_mii_postcall);
+	if (ret) {
+		puts("FEC MXS: Unable to register FEC0 mii postcall\n");
+		return ret;
+	}
+
+	dev = eth_get_dev_by_name("FEC1");
+	if (!dev) {
+		puts("FEC MXS: Unable to get FEC1 device entry\n");
+		return -EINVAL;
+	}
+
+	ret = fecmxc_register_mii_postcall(dev, fecmxc_mii_postcall);
+	if (ret) {
+		puts("FEC MXS: Unable to register FEC1 mii postcall\n");
+		return ret;
+	}
+
+	return ret;
+}
+
+#endif
diff --git a/board/freescale/mx28evk/u-boot.bd b/board/freescale/mx28evk/u-boot.bd
new file mode 100644
index 0000000..c60615a
--- /dev/null
+++ b/board/freescale/mx28evk/u-boot.bd
@@ -0,0 +1,14 @@
+sources {
+	u_boot_spl="spl/u-boot-spl.bin";
+	u_boot="u-boot.bin";
+}
+
+section (0) {
+	load u_boot_spl > 0x0000;
+	load ivt (entry = 0x0014) > 0x8000;
+	hab call 0x8000;
+
+	load u_boot > 0x40000100;
+	load ivt (entry = 0x40000100) > 0x8000;
+	hab call 0x8000;
+}
diff --git a/boards.cfg b/boards.cfg
index 1e5b3e0..e859024 100644
--- a/boards.cfg
+++ b/boards.cfg
@@ -160,6 +160,7 @@ zmx25                        arm         arm926ejs   zmx25               syteco
 imx27lite                    arm         arm926ejs   imx27lite           logicpd        mx27
 magnesium                    arm         arm926ejs   imx27lite           logicpd        mx27
 m28evk                       arm         arm926ejs   -                   denx           mx28
+mx28evk                      arm         arm926ejs   -                   freescale      mx28
 nhk8815                      arm         arm926ejs   nhk8815             st             nomadik
 nhk8815_onenand              arm         arm926ejs   nhk8815             st             nomadik       nhk8815:BOOT_ONENAND
 omap1610h2		     arm	 arm926ejs   omap1610inn	 ti		omap	    omap1610inn:CS3_BOOT
diff --git a/include/configs/mx28evk.h b/include/configs/mx28evk.h
new file mode 100644
index 0000000..5b8a1bf
--- /dev/null
+++ b/include/configs/mx28evk.h
@@ -0,0 +1,176 @@
+/*
+ * (C) Copyright 2011 Freescale Semiconductor, Inc.
+ * Author: Fabio Estevam <fabio.estevam@freescale.com>
+ *
+ * Based on m28evk.h:
+ * Copyright (C) 2011 Marek Vasut <marek.vasut@gmail.com>
+ * on behalf of DENX Software Engineering GmbH
+ *
+ * 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.
+ */
+#ifndef __CONFIG_H
+#define __CONFIG_H
+
+#include <asm/arch/regs-base.h>
+
+/*
+ * SoC configurations
+ */
+#define	CONFIG_MX28				/* i.MX28 SoC */
+#define	CONFIG_MXS_GPIO				/* GPIO control */
+#define	CONFIG_SYS_HZ		1000		/* Ticks per second */
+
+#define CONFIG_MACH_TYPE	MACH_TYPE_MX28EVK
+
+#define	CONFIG_SYS_NO_FLASH
+#define	CONFIG_SYS_ICACHE_OFF
+#define	CONFIG_SYS_DCACHE_OFF
+#define	CONFIG_BOARD_EARLY_INIT_F
+#define	CONFIG_ARCH_CPU_INIT
+#define	CONFIG_ARCH_MISC_INIT
+
+/*
+ * SPL
+ */
+#define CONFIG_SPL
+#define CONFIG_SPL_NO_CPU_SUPPORT_CODE
+#define CONFIG_SPL_START_S_PATH	"arch/arm/cpu/arm926ejs/mx28"
+#define CONFIG_SPL_LDSCRIPT	"arch/arm/cpu/arm926ejs/mx28/u-boot-spl.lds"
+#define CONFIG_SPL_LIBCOMMON_SUPPORT
+#define CONFIG_SPL_LIBGENERIC_SUPPORT
+
+/*
+ * U-Boot Commands
+ */
+#include <config_cmd_default.h>
+#define	CONFIG_DISPLAY_CPUINFO
+#define	CONFIG_DOS_PARTITION
+#define CONFIG_CMD_FAT
+
+#define	CONFIG_CMD_CACHE
+#define	CONFIG_CMD_DHCP
+#define	CONFIG_CMD_GPIO
+#define	CONFIG_CMD_MII
+#define	CONFIG_CMD_MMC
+#define	CONFIG_CMD_NET
+#define	CONFIG_CMD_NFS
+#define	CONFIG_CMD_PING
+
+/*
+ * Memory configurations
+ */
+#define	CONFIG_NR_DRAM_BANKS		1		/* 1 bank of DRAM */
+#define	PHYS_SDRAM_1			0x40000000	/* Base address */
+#define	PHYS_SDRAM_1_SIZE		0x40000000	/* Max 1 GB RAM */
+#define	CONFIG_STACKSIZE		(128 * 1024)	/* 128 KB stack */
+#define	CONFIG_SYS_MALLOC_LEN		0x00400000	/* 4 MB for malloc */
+#define	CONFIG_SYS_MEMTEST_START	0x40000000	/* Memtest start adr */
+#define	CONFIG_SYS_MEMTEST_END		0x40400000	/* 4 MB RAM test */
+#define	CONFIG_SYS_SDRAM_BASE		PHYS_SDRAM_1
+/* Point initial SP in SRAM so SPL can use it too. */
+
+#define CONFIG_SYS_INIT_RAM_ADDR	0x00002000
+#define CONFIG_SYS_INIT_RAM_SIZE	(128 * 1024)
+
+#define CONFIG_SYS_INIT_SP_OFFSET \
+	(CONFIG_SYS_INIT_RAM_SIZE - GENERATED_GBL_DATA_SIZE)
+#define CONFIG_SYS_INIT_SP_ADDR \
+	(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_SP_OFFSET)
+
+/*
+ * We need to sacrifice first 4 bytes of RAM here to avoid triggering some
+ * strange BUG in ROM corrupting first 4 bytes of RAM when loading U-Boot
+ * binary. In case there was more of this mess, 0x100 bytes are skipped.
+ */
+#define	CONFIG_SYS_TEXT_BASE		0x40000100
+
+#define CONFIG_ENV_OVERWRITE
+/*
+ * U-Boot general configurations
+ */
+#define	CONFIG_SYS_LONGHELP
+#define	CONFIG_SYS_PROMPT	"MX28EVK U-Boot > "
+#define	CONFIG_SYS_CBSIZE	1024		/* Console I/O buffer size */
+#define	CONFIG_SYS_PBSIZE	\
+	(CONFIG_SYS_CBSIZE + sizeof(CONFIG_SYS_PROMPT) + 16)
+						/* Print buffer size */
+#define	CONFIG_SYS_MAXARGS	32		/* Max number of command args */
+#define	CONFIG_SYS_BARGSIZE	CONFIG_SYS_CBSIZE
+						/* Boot argument buffer size */
+#define	CONFIG_VERSION_VARIABLE			/* U-BOOT version */
+#define	CONFIG_AUTO_COMPLETE			/* Command auto complete */
+#define	CONFIG_CMDLINE_EDITING			/* Command history etc */
+#define	CONFIG_SYS_HUSH_PARSER
+#define	CONFIG_SYS_PROMPT_HUSH_PS2	"> "
+
+/*
+ * Serial Driver
+ */
+#define	CONFIG_PL011_SERIAL
+#define	CONFIG_PL011_CLOCK		24000000
+#define	CONFIG_PL01x_PORTS		{ (void *)MXS_UARTDBG_BASE }
+#define	CONFIG_CONS_INDEX		0
+#define	CONFIG_BAUDRATE			115200	/* Default baud rate */
+#define	CONFIG_SYS_BAUDRATE_TABLE	{ 9600, 19200, 38400, 57600, 115200 }
+
+/*
+ * MMC Driver
+ */
+#define CONFIG_ENV_IS_IN_MMC
+#define CONFIG_ENV_OFFSET	(256 * 1024)
+#define CONFIG_ENV_SIZE		(16 * 1024)
+#define CONFIG_SYS_MMC_ENV_DEV 0
+#define CONFIG_CMD_SAVEENV
+#ifdef	CONFIG_CMD_MMC
+#define	CONFIG_MMC
+#define	CONFIG_GENERIC_MMC
+#define	CONFIG_MXS_MMC
+#endif
+
+/*
+ * Ethernet on SOC (FEC)
+ */
+#ifdef	CONFIG_CMD_NET
+#define	CONFIG_NET_MULTI
+#define	CONFIG_ETHPRIME			"FEC0"
+#define	CONFIG_FEC_MXC
+#define	CONFIG_FEC_MXC_MULTI
+#define	CONFIG_MII
+#define	CONFIG_DISCOVER_PHY
+#define	CONFIG_FEC_XCV_TYPE		RMII
+#define CONFIG_MX28_FEC_MAC_IN_OCOTP
+#endif
+
+/*
+ * Boot Linux
+ */
+#define	CONFIG_CMDLINE_TAG
+#define	CONFIG_SETUP_MEMORY_TAGS
+#define	CONFIG_BOOTDELAY	3
+#define	CONFIG_BOOTFILE		"uImage"
+#define	CONFIG_BOOTCOMMAND	"run bootcmd_net"
+#define	CONFIG_LOADADDR		0x42000000
+#define	CONFIG_SYS_LOAD_ADDR	CONFIG_LOADADDR
+
+/*
+ * Extra Environments
+ */
+#define CONFIG_EXTRA_ENV_SETTINGS \
+	"console_fsl=console=ttyAM0" \
+	"console_mainline=console=ttyAMA0" \
+	"netargs=setenv bootargs console=${console_mainline}" \
+		"root=/dev/nfs " \
+		"ip=dhcp nfsroot=${serverip}:${nfsroot}\0" \
+	"bootcmd_net=echo Booting from net ...; " \
+		"run netargs; " \
+		"dhcp ${uimage}; bootm\0" \
+
+#endif /* __CONFIG_H */
-- 
1.7.1