arm/km: add kmnusa board support

This board is similar to portl2, but it has the u-boot environment
in a SPI NOR flash and not in an i2c eeprom like portl2 have.

Some other details:
 - IVM EEPROM is at adress: pca9547:70:9
 - PCI is enabled
 - PIGGY4 is connected via MV88E6352 simple switch. There is no phy
   between the simple switch and the kirkwood.

Signed-off-by: Holger Brunck <holger.brunck@keymile.com>
Signed-off-by: Valentin Longchamp <valentin.longchamp@keymile.com>
cc: Gerlando Falauto <gerlando.falauto@keymile.com>
cc: Prafulla Wadaskar <prafulla@marvell.com>

MAINTAINERS

@@ -740,6 +740,7 @@ Sergey Lapin <slapin@ossfans.org>
 Valentin Longchamp <valentin.longchamp@keymile.com>
 
 	km_kirkwood	ARM926EJS (Kirkwood SoC)
+	kmnusa		ARM926EJS (Kirkwood SoC)
 	mgcoge3un	ARM926EJS (Kirkwood SoC)
 	portl2		ARM926EJS (Kirkwood SoC)
 

board/keymile/km_arm/km_arm.c

@@ -134,10 +134,11 @@ int startup_allowed(void)
 }
 #endif
 
-#if (defined(CONFIG_MGCOGE3UN)|defined(CONFIG_PORTL2))
+#if (defined(CONFIG_MGCOGE3UN)|defined(CONFIG_PORTL2)| \
+	defined(CONFIG_KM_PIGGY4_88E6352))
 /*
- * These two boards have always ethernet present. Its connected to the mv
- * switch.
+ * All boards with PIGGY4 connected via a simple switch have ethernet always
+ * present.
  */
 int ethernet_present(void)
 {

board/keymile/km_arm/kwbimage_128M16_1.cfg

+#
+# (C) Copyright 2010
+# Heiko Schocher, DENX Software Engineering, hs@denx.de.
+#
+# (C) Copyright 2012
+# Valentin Longchamp, Keymile AG, valentin.longchamp@keymile.com
+# Stefan Bigler, Keymile AG, stefan.bigler@keymile.com
+#
+# (C) Copyright 2012
+# 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
+#
+# Refer docs/README.kwimage for more details about how-to configure
+# and create kirkwood boot image
+#
+
+# Boot Media configurations
+BOOT_FROM	spi	# Boot from SPI flash
+
+DATA 0xFFD10000 0x01112222	# MPP Control 0 Register
+# bit 3-0:   2, MPPSel0  SPI_CSn  (1=NF_IO[2])
+# bit 7-4:   2, MPPSel1  SPI_SI   (1=NF_IO[3])
+# bit 12-8:  2, MPPSel2  SPI_SCK  (1=NF_IO[4])
+# bit 15-12: 2, MPPSel3  SPI_SO   (1=NF_IO[5])
+# bit 19-16: 1, MPPSel4  NF_IO[6]
+# bit 23-20: 1, MPPSel5  NF_IO[7]
+# bit 27-24: 1, MPPSel6  SYSRST_O
+# bit 31-28: 0, MPPSel7  GPO[7]
+
+DATA 0xFFD10004 0x03303300	# MPP Control 1 Register
+# bit 3-0:   0, MPPSel8	 GPIO[8]
+# bit 7-4:   0, MPPSel9  GPIO[9]
+# bit 12-8:  3, MPPSel10 UA0_TXD
+# bit 15-12: 3, MPPSel11 UA0_RXD
+# bit 19-16: 0, MPPSel12 not connected
+# bit 23-20: 3, MPPSel13 UA1_TXD
+# bit 27-24: 3, MPPSel14 UA1_RXD
+# bit 31-28: 0, MPPSel15 GPIO[15]
+
+DATA 0xFFD10008 0x00001100	# MPP Control 2 Register
+# bit 3-0:   0, MPPSel16 GPIO[16]
+# bit 7-4:   0, MPPSel17 not connected
+# bit 12-8:  1, MPPSel18 NF_IO[0]
+# bit 15-12: 1, MPPSel19 NF_IO[1]
+# bit 19-16: 0, MPPSel20 GPIO[20]
+# bit 23-20: 0, MPPSel21 GPIO[21]
+# bit 27-24: 0, MPPSel22 GPIO[22]
+# bit 31-28: 0, MPPSel23 GPIO[23]
+
+# MPP Control 3-6 Register untouched (MPP24-49)
+
+DATA 0xFFD100E0 0x1B1B1B1B	# IO Configuration 0 Register
+# bit 2-0:   3, Reserved
+# bit 5-3:   3, Reserved
+# bit 6:     0, Reserved
+# bit 7:     0, RGMII-pads voltage = 3.3V
+# bit 10-8:  3, Reserved
+# bit 13-11: 3, Reserved
+# bit 14:    0, Reserved
+# bit 15:    0, MPP RGMII-pads voltage = 3.3V
+# bit 31-16  0x1B1B, Reserved
+
+DATA 0xFFD20134 0x66666666	# L2 RAM Timing 0 Register
+# bit 0-1:   2, Tag RAM RTC RAM0
+# bit 3-2:   1, Tag RAM WTC RAM0
+# bit 7-4:   6, Reserve
+# bit 9-8:   2, Valid RAM RTC RAM
+# bit 11-10: 1, Valid RAM WTC RAM
+# bit 13-12: 2, Dirty RAM RTC RAM
+# bit 15-14: 1, Dirty RAM WTC RAM
+# bit 17-16: 2, Data RAM RTC RAM0
+# bit 19-18: 1, Data RAM WTC RAM0
+# bit 21-20: 2, Data RAM RTC RAM1
+# bit 23-22: 1, Data RAM WTC RAM1
+# bit 25-24: 2, Data RAM RTC RAM2
+# bit 27-26: 1, Data RAM WTC RAM2
+# bit 29-28: 2, Data RAM RTC RAM3
+# bit 31-30: 1, Data RAM WTC RAM4
+
+DATA 0xFFD20138 0x66666666	# L2 RAM Timing 1 Register
+# bit 15-0:  ???, Reserve
+# bit 17-16: 2, ECC RAM RTC RAM0
+# bit 19-18: 1, ECC RAM WTC RAM0
+# bit 31-20: ???,Reserve
+
+DATA 0xFFD20154 0x00000200	# CPU RAM Management Control3 Register
+# bit 23-0:  0x000200, Addr Config tuning
+# bit 31-24: 0,        Reserved
+
+# ??? Missing register # CPU RAM Management Control2 Register
+
+DATA 0xFFD2014C 0x00001C00	# CPU RAM Management Control1 Register
+# bit 15-0:  0x1C00, Opmux Tuning
+# bit 31-16: 0,      Pc Dp Tuning
+
+DATA 0xFFD20148 0x00000001	# CPU RAM Management Control0 Register
+# bit 1-0:   1, addr clk tune
+# bit 3-2:   0, reserved
+# bit 5-4:   0, dtcmp clk tune
+# bit 7-6:   0, reserved
+# bit 9-8:   0, macdrv clk tune
+# bit 11-10: 0, opmuxgm2 clk tune
+# bit 15-14: 0, rf clk tune
+# bit 17-16: 0, rfbypass clk tune
+# bit 19-18: 0, pc dp clk tune
+# bit 23-20: 0, icache clk tune
+# bit 27:24: 0, dcache clk tune
+# bit 31:28: 0, regfile tunin
+
+# SDRAM initalization
+DATA 0xFFD01400 0x430004E0	# SDRAM Configuration Register
+# bit 13-0:  0x4E0, DDR2 clks refresh rate
+# bit 14:    0, reserved
+# bit 15:    0, reserved
+# bit 16:    0, CPU to Dram Write buffer policy
+# bit 17:    0, Enable Registered DIMM or Equivalent Sampling Logic
+# bit 19-18: 0, reserved
+# bit 23-20: 0, reserved
+# bit 24:    1, enable exit self refresh mode on DDR access
+# bit 25:    1, required
+# bit 29-26: 0, reserved
+# bit 31-30: 1, reserved
+
+DATA 0xFFD01404 0x36543000	# DDR Controller Control Low
+# bit 3-0:   0, reserved
+# bit 4:     0, 2T mode =addr/cmd in same cycle
+# bit 5:     0, clk is driven during self refresh, we don't care for APX
+# bit 6:     0, use recommended falling edge of clk for addr/cmd
+# bit 7-11:  0, reserved
+# bit 12-13: 1, reserved, required 1
+# bit 14:    0, input buffer always powered up
+# bit 17-15: 0, reserved
+# bit 18:    1, cpu lock transaction enabled
+# bit 19:    0, reserved
+# bit 23-20: 5, recommended value for CL=4 and STARTBURST_DEL disabled bit31=0
+# bit 27-24: 6, CL+1, STARTBURST sample stages, for freqs 200-399MHz, unbuffered DIMM
+# bit 30-28: 3, required
+# bit 31:    0,no additional STARTBURST delay
+
+DATA 0xFFD01408 0x2302444e	# DDR Timing (Low) (active cycles value +1)
+# bit 3-0:   0xE, TRAS, 15 clk (45 ns)
+# bit 7-4:   0x4, TRCD, 5 clk (15 ns)
+# bit 11-8:  0x4, TRP, 5 clk (15 ns)
+# bit 15-12: 0x4, TWR, 5 clk (15 ns)
+# bit 19-16: 0x2, TWTR, 3 clk (7.5 ns)
+# bit 20:      0, extended TRAS msb
+# bit 23-21:   0, reserved
+# bit 27-24: 0x3, TRRD, 4 clk (10 ns)
+# bit 31-28: 0x2, TRTP, 3 clk (7.5 ns)
+
+DATA 0xFFD0140C 0x0000003e	#  DDR Timing (High)
+# bit 6-0:   0x3E, TRFC, 63 clk (195 ns)
+# bit 8-7:      0, TR2R
+# bit 10-9:     0, TR2W
+# bit 12-11:    0, TW2W
+# bit 31-13:    0, reserved
+
+DATA 0xFFD01410 0x00000001	#  DDR Address Control
+# bit 1-0:    1, Cs0width=x16
+# bit 3-2:    0, Cs0size=2Gb
+# bit 5-4:    0, Cs1width=nonexistent
+# bit 7-6:    0, Cs1size =nonexistent
+# bit 9-8:    0, Cs2width=nonexistent
+# bit 11-10:  0, Cs2size =nonexistent
+# bit 13-12:  0, Cs3width=nonexistent
+# bit 15-14:  0, Cs3size =nonexistent
+# bit 16:     0, Cs0AddrSel
+# bit 17:     0, Cs1AddrSel
+# bit 18:     0, Cs2AddrSel
+# bit 19:     0, Cs3AddrSel
+# bit 31-20:  0, required
+
+DATA 0xFFD01414 0x00000000	#  DDR Open Pages Control
+# bit 0:      0,  OpenPage enabled
+# bit 31-1:   0, required
+
+DATA 0xFFD01418 0x00000000	#  DDR Operation
+# bit 3-0:    0, DDR cmd
+# bit 31-4:   0, required
+
+DATA 0xFFD0141C 0x00000652	#  DDR Mode
+# bit 2-0:    2, Burst Length = 4
+# bit 3:      0, Burst Type
+# bit 6-4:    5, CAS Latency = 5
+# bit 7:      0, Test mode
+# bit 8:      0, DLL Reset
+# bit 11-9:   3, Write recovery for auto-precharge must be 3
+# bit 12:     0, Active power down exit time, fast exit
+# bit 14-13:  0, reserved
+# bit 31-15:  0, reserved
+
+DATA 0xFFD01420 0x00000006	#  DDR Extended Mode
+# bit 0:      0, DDR DLL enabled
+# bit 1:      1,  DDR drive strength reduced
+# bit 2:      1,  DDR ODT control lsb, 75 ohm termination [RTT0]
+# bit 5-3:    0, required
+# bit 6:      0, DDR ODT control msb, 75 ohm termination [RTT1]
+# bit 9-7:    0, required
+# bit 10:     0, differential DQS enabled
+# bit 11:     0, required
+# bit 12:     0, DDR output buffer enabled
+# bit 31-13:  0 required
+
+DATA 0xFFD01424 0x0000F17F	#  DDR Controller Control High
+# bit 2-0:    7, required
+# bit 3:      1, MBUS Burst Chop disabled
+# bit 6-4:    7, required
+# bit 7:      0, reserved
+# bit 8:      1, add sample stage required for f > 266 MHz
+# bit 9:      0, no half clock cycle addition to dataout
+# bit 10:     0, 1/4 clock cycle skew enabled for addr/ctl signals
+# bit 11:     0, 1/4 clock cycle skew disabled for write mesh
+# bit 15-12:0xf, required
+# bit 31-16:  0, required
+
+DATA 0xFFD01428 0x00084520	# DDR2 SDRAM Timing Low
+# bit 3-0:    0, required
+# bit 7-4:    2, M_ODT assertion 2 cycles after read start command
+# bit 11-8:   5, M_ODT de-assertion 5 cycles after read start command
+#                (ODT turn off delay 2,5 clk cycles)
+# bit 15-12:  4, internal ODT time based on bit 7-4
+#                with the considered SDRAM internal delay
+# bit 19-16:  8, internal ODT de-assertion based on bit 11-8
+#                with the considered SDRAM internal delay
+# bit 31-20:  0, required
+
+DATA 0xFFD0147c 0x00008452	# DDR2 SDRAM Timing High
+# bit 3-0:    2, M_ODT assertion same as bit 11-8
+# bit 7-4:    5, M_ODT de-assertion same as bit 15-12
+# bit 11-8:   4, internal ODT assertion 2 cycles after write start command
+#                with the considered SDRAM internal delay
+# bit 15-12:  8, internal ODT de-assertion 5 cycles after write start command
+#                with the considered SDRAM internal delay
+
+DATA 0xFFD01500 0x00000000	# CS[0]n Base address to 0x0
+# bit 23-0:   0, reserved
+# bit 31-24:  0, CPU CS Window0 Base Address, addr bits [31:24]
+
+DATA 0xFFD01504 0x0FFFFFF1	# CS[0]n Size
+# bit 0:      1, Window enabled
+# bit 1:      0, Write Protect disabled
+# bit 3-2:    0, CS0 hit selected
+# bit 23-4:ones, required
+# bit 31-24: 0x0F, Size (i.e. 256MB)
+
+DATA 0xFFD0150C 0x00000000	# CS[1]n Size, window disabled
+DATA 0xFFD01514 0x00000000	# CS[2]n Size, window disabled
+DATA 0xFFD0151C 0x00000000	# CS[3]n Size, window disabled
+
+DATA 0xFFD01494 0x00010000	#  DDR ODT Control (Low)
+# bit 3-0:     0, ODT0Rd, MODT[0] not asserted during read from DRAM CS0
+# bit 7-4:     0, ODT0Rd, MODT[1] not asserted
+# bit 11-8:    0, required
+# big 15-11:   0, required
+# bit 19-16:   1, ODT0Wr, MODT[0] asserted during write to DRAM CS0
+# bit 23-20:   0, ODT0Wr, MODT[1] not asserted
+# bit 27-24:   0, required
+# bit 31-28:   0, required
+
+DATA 0xFFD01498 0x00000000	#  DDR ODT Control (High)
+# bit 1-0:     0, ODT0 controlled by ODT Control (low) register above
+# bit 3-2:     0, ODT1 controlled by register
+# bit 31-4:    0, required
+
+DATA 0xFFD0149C 0x0000E801	# CPU ODT Control
+# bit 3-0:     1, ODTRd, Internal ODT asserted during read from DRAM bank0
+# bit 7-4:     0, ODTWr, Internal ODT not asserted during write to DRAM
+# bit 9-8:     0, ODTEn, controlled by ODTRd and ODTWr
+# bit 11-10:   2, DQ_ODTSel. ODT select turned on, 75 ohm
+# bit 13-12:   2, STARTBURST ODT buffer selected, 75 ohm
+# bit 14:      1, STARTBURST ODT enabled
+# bit 15:      1, Use ODT Block
+
+DATA 0xFFD01480 0x00000001	# DDR Initialization Control
+# bit 0:       1, enable DDR init upon this register write
+# bit 31-1:    0, reserved
+
+# End of Header extension
+DATA 0x0 0x0

boards.cfg

@@ -142,6 +142,7 @@ lschlv2                      arm         arm926ejs   lsxl                buffalo
 lsxhl                        arm         arm926ejs   lsxl                buffalo        kirkwood    lsxl:LSXHL
 km_kirkwood                  arm         arm926ejs   km_arm              keymile        kirkwood    km_kirkwood:KM_KIRKWOOD,KM_DISABLE_PCI
 km_kirkwood_pci              arm         arm926ejs   km_arm              keymile        kirkwood    km_kirkwood:KM_KIRKWOOD_PCI,KM_RECONFIG_XLX
+kmnusa                       arm         arm926ejs   km_arm              keymile        kirkwood    km_kirkwood:KM_NUSA
 mgcoge3un                    arm         arm926ejs   km_arm              keymile        kirkwood
 portl2                       arm         arm926ejs   km_arm              keymile        kirkwood
 inetspace_v2                 arm         arm926ejs   netspace_v2         LaCie          kirkwood	lacie_kw:INETSPACE_V2

include/configs/km/km_arm.h

@@ -57,6 +57,13 @@
 #define CONFIG_CMD_SF
 #define CONFIG_SOFT_I2C		/* I2C bit-banged	*/
 
+#if defined CONFIG_KM_ENV_IS_IN_SPI_NOR
+#define CONFIG_ENV_SPI_BUS		0
+#define CONFIG_ENV_SPI_CS		0
+#define CONFIG_ENV_SPI_MAX_HZ		5000000
+#define CONFIG_ENV_SPI_MODE		SPI_MODE_3
+#endif
+
 #include "asm/arch/config.h"
 
 #define CONFIG_SYS_TEXT_BASE	0x07d00000	/* code address before reloc */
@@ -211,6 +218,15 @@ int get_scl(void);
 /*
  *  Environment variables configurations
  */
+#if defined CONFIG_KM_ENV_IS_IN_SPI_NOR
+#define CONFIG_ENV_IS_IN_SPI_FLASH  /* use SPI-Flash for environment vars */
+#define CONFIG_ENV_OFFSET		0xc0000     /* no bracets! */
+#define CONFIG_ENV_SIZE			0x02000     /* Size of Environment */
+#define CONFIG_ENV_SECT_SIZE		0x10000
+#define CONFIG_ENV_OFFSET_REDUND	(CONFIG_ENV_OFFSET + \
+					CONFIG_ENV_SECT_SIZE)
+#define CONFIG_ENV_TOTAL_SIZE		0x20000     /* no bracets! */
+#else
 #define CONFIG_ENV_IS_IN_EEPROM		/* use EEPROM for environment vars */
 #define CONFIG_SYS_DEF_EEPROM_ADDR	0x50
 #define CONFIG_ENV_EEPROM_IS_ON_I2C
@@ -218,11 +234,11 @@ int get_scl(void);
 #define CONFIG_ENV_OFFSET		0x0 /* no bracets! */
 #define CONFIG_ENV_SIZE			(0x2000 - CONFIG_ENV_OFFSET)
 #define CONFIG_I2C_ENV_EEPROM_BUS	KM_ENV_BUS "\0"
-
-/* offset redund: (CONFIG_ENV_OFFSET + CONFIG_ENV_SIZE) */
-#define CONFIG_SYS_REDUNDAND_ENVIRONMENT
 #define CONFIG_ENV_OFFSET_REDUND	0x2000 /* no bracets! */
 #define CONFIG_ENV_SIZE_REDUND		(CONFIG_ENV_SIZE)
+#endif
+
+#define CONFIG_SYS_REDUNDAND_ENVIRONMENT
 
 #define CONFIG_SPI_FLASH
 #define CONFIG_SPI_FLASH_STMICRO
@@ -248,17 +264,27 @@ int get_scl(void);
 		"sf probe 0;sf erase 0 +${filesize};"			\
 		"sf write ${load_addr_r} 0 ${filesize};\0"
 
-/*
- * Default environment variables
- */
-#define CONFIG_EXTRA_ENV_SETTINGS					\
-	CONFIG_KM_DEF_ENV						\
+#if defined CONFIG_KM_ENV_IS_IN_SPI_NOR
+#define CONFIG_KM_NEW_ENV						\
+	"newenv=sf probe 0;"						\
+		"sf erase " xstr(CONFIG_ENV_OFFSET) " "			\
+		xstr(CONFIG_ENV_TOTAL_SIZE)"\0"
+#else
+#define CONFIG_KM_NEW_ENV						\
 	"newenv=setenv addr 0x100000 && "				\
 		"i2c dev 1; mw.b ${addr} 0 4 && "			\
 		"eeprom write " xstr(CONFIG_SYS_DEF_EEPROM_ADDR)	\
 		" ${addr} " xstr(CONFIG_ENV_OFFSET) " 4 && "		\
 		"eeprom write " xstr(CONFIG_SYS_DEF_EEPROM_ADDR)	\
-		" ${addr} " xstr(CONFIG_ENV_OFFSET_REDUND) " 4\0"	\
+		" ${addr} " xstr(CONFIG_ENV_OFFSET_REDUND) " 4\0"
+#endif
+
+/*
+ * Default environment variables
+ */
+#define CONFIG_EXTRA_ENV_SETTINGS					\
+	CONFIG_KM_DEF_ENV						\
+	CONFIG_KM_NEW_ENV						\
 	"arch=arm\0"							\
 	"EEprom_ivm=" KM_IVM_BUS "\0"					\
 	""

include/configs/km_kirkwood.h

@@ -6,8 +6,9 @@
  * (C) Copyright 2009
  * Stefan Roese, DENX Software Engineering, sr@denx.de.
  *
- * (C) Copyright 2011
- * Holger Brunck, Keymile GmbH Hannover, holger.brunck@keymile.de
+ * (C) Copyright 2011-2012
+ * Holger Brunck, Keymile GmbH Hannover, holger.brunck@keymile.com
+ * Valentin Longchamp, Keymile AG, valentin.longchamp@keymile.com
  *
  * See file CREDITS for list of people who contributed to this
  * project.
@@ -36,23 +37,67 @@
 #ifndef _CONFIG_KM_KIRKWOOD_H
 #define _CONFIG_KM_KIRKWOOD_H
 
-/* include common defines/options for all arm based Keymile boards */
-#include "km/km_arm.h"
-
-/*
- * Version number information
- */
 #if defined(CONFIG_KM_KIRKWOOD)
-#define CONFIG_IDENT_STRING	"\nKeymile Kirkwood"
+#define CONFIG_IDENT_STRING		"\nKeymile Kirkwood"
 #undef  CONFIG_KIRKWOOD_PCIE_INIT
+#define KM_IVM_BUS			"pca9544a:70:9"	/* I2C2 (Mux-Port 1)*/
 #elif defined(CONFIG_KM_KIRKWOOD_PCI)
-#define CONFIG_IDENT_STRING	"\nKeymile Kirkwood PCI"
+#define CONFIG_IDENT_STRING		"\nKeymile Kirkwood PCI"
+#define KM_IVM_BUS			"pca9544a:70:9"	/* I2C2 (Mux-Port 1)*/
+/* KM_NUSA */
+#elif defined(CONFIG_KM_NUSA)
+#define KM_IVM_BUS			"pca9547:70:9"	/* I2C2 (Mux-Port 1)*/
+#define CONFIG_IDENT_STRING		"\nKeymile NUSA"
+#undef CONFIG_SYS_KWD_CONFIG
+#define CONFIG_SYS_KWD_CONFIG \
+		$(SRCTREE)/$(CONFIG_BOARDDIR)/kwbimage_128M16_1.cfg
+#define CONFIG_KM_ENV_IS_IN_SPI_NOR
+#define CONFIG_KM_FPGA_CONFIG
+#define CONFIG_KM_PIGGY4_88E6352
+
+#else
+#error ("Board unsupported")
 #endif
 
+/* include common defines/options for all arm based Keymile boards */
+#include "km/km_arm.h"
+
 #define CONFIG_HOSTNAME			km_kirkwood
 
-#define KM_IVM_BUS	"pca9544a:70:9"	/* I2C2 (Mux-Port 1)*/
+#ifndef CONFIG_KM_ENV_IS_IN_SPI_NOR
 #define KM_ENV_BUS	"pca9544a:70:d"	/* I2C2 (Mux-Port 5)*/
+#endif
+
+#if defined(CONFIG_KM_PIGGY4_88E6352)
+/*
+ * Some keymile boards like mgcoge5un & nusa1 have their PIGGY4 connected via
+ * an Marvell 88E6352 simple switch.
+ * In this case we have to change the default settings for the etherent mac.
+ * There is NO ethernet phy. The ARM and Switch are conencted directly over
+ * RGMII in MAC-MAC mode
+ * In this case 1GBit full duplex and autoneg off
+ */
+#define PORT_SERIAL_CONTROL_VALUE		( \
+	MVGBE_FORCE_LINK_PASS			    | \
+	MVGBE_DIS_AUTO_NEG_FOR_DUPLX		| \
+	MVGBE_DIS_AUTO_NEG_FOR_FLOW_CTRL	| \
+	MVGBE_ADV_NO_FLOW_CTRL			    | \
+	MVGBE_FORCE_FC_MODE_NO_PAUSE_DIS_TX	| \
+	MVGBE_FORCE_BP_MODE_NO_JAM		    | \
+	(1 << 9) /* Reserved bit has to be 1 */	| \
+	MVGBE_DO_NOT_FORCE_LINK_FAIL		| \
+	MVGBE_DIS_AUTO_NEG_SPEED_GMII		| \
+	MVGBE_DTE_ADV_0				        | \
+	MVGBE_MIIPHY_MAC_MODE			    | \
+	MVGBE_AUTO_NEG_NO_CHANGE		    | \
+	MVGBE_MAX_RX_PACKET_1552BYTE		| \
+	MVGBE_CLR_EXT_LOOPBACK			    | \
+	MVGBE_SET_FULL_DUPLEX_MODE		    | \
+	MVGBE_EN_FLOW_CTRL_TX_RX_IN_FULL_DUPLEX	|\
+	MVGBE_SET_GMII_SPEED_TO_1000	    |\
+	MVGBE_SET_MII_SPEED_TO_100)
+
+#endif
 
 /* GPIO Pin from kirkwood connected to PROGRAM_B pin of the xilinx FPGA */
 #define KM_XLX_PROGRAM_B_PIN    39