Ethernut 5 board support

Add support for the Ethernut 5 open hardware design, based
on Atmel's AT91SAM9XE512 SoC.

V4
 - Fix several coding style issues.
 - Move machine type to config file.
 - Remove use of CONFIG_ATMEL_LEGACY.

Signed-off-by: Tim Schendekehl <tim.schendekehl@egnite.de>

4 files changed, 724 insertions, 0 deletions

diff --git a/board/egnite/ethernut5/Makefile b/board/egnite/ethernut5/Makefile
new file mode 100644
index 0000000000..8dc85d2b42
--- /dev/null
+++ b/board/egnite/ethernut5/Makefile
@@ -0,0 +1,48 @@
+#
+# (C) Copyright 2003-2008
+# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+#
+# (C) Copyright 2010
+# egnite 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.
+#
+# 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
+
+COBJS-y	+= $(BOARD).o
+COBJS-y	+= $(BOARD)_pwrman.o
+
+SRCS	:= $(SOBJS:.o=.S) $(COBJS-y:.o=.c)
+OBJS	:= $(addprefix $(obj),$(COBJS-y))
+SOBJS	:= $(addprefix $(obj),$(SOBJS))
+
+$(LIB):	$(obj).depend $(OBJS) $(SOBJS)
+	$(call cmd_link_o_target, $(OBJS) $(SOBJS))
+
+#########################################################################
+
+# defines $(obj).depend target
+include $(SRCTREE)/rules.mk
+
+sinclude $(obj).depend
+
+#########################################################################
diff --git a/board/egnite/ethernut5/ethernut5.c b/board/egnite/ethernut5/ethernut5.c
new file mode 100644
index 0000000000..e42e91e00b
--- /dev/null
+++ b/board/egnite/ethernut5/ethernut5.c
@@ -0,0 +1,270 @@
+/*
+ * (C) Copyright 2011
+ * egnite GmbH <info@egnite.de>
+ *
+ * (C) Copyright 2010
+ * Ole Reinhardt <ole.reinhardt@thermotemp.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
+ */
+
+/*
+ * Ethernut 5 general board support
+ *
+ * Ethernut is an open source hardware and software project for
+ * embedded Ethernet devices. Hardware layouts and CAD files are
+ * freely available under BSD-like license.
+ *
+ * Ethernut 5 is the first member of the Ethernut board family
+ * with U-Boot and Linux support. This implementation is based
+ * on the original work done by Ole Reinhardt, but heavily modified
+ * to support additional features and the latest board revision 5.0F.
+ *
+ * Main board components are by default:
+ *
+ * Atmel AT91SAM9XE512 CPU with 512 kBytes NOR Flash
+ * 2 x 64 MBytes Micron MT48LC32M16A2P SDRAM
+ * 512 MBytes Micron MT29F4G08ABADA NAND Flash
+ * 4 MBytes Atmel AT45DB321D DataFlash
+ * SMSC LAN8710 Ethernet PHY
+ * Atmel ATmega168 MCU used for power management
+ * Linear Technology LTC4411 PoE controller
+ *
+ * U-Boot relevant board interfaces are:
+ *
+ * 100 Mbit Ethernet with IEEE 802.3af PoE
+ * RS-232 serial port
+ * USB host and device
+ * MMC/SD-Card slot
+ * Expansion port with I2C, SPI and more...
+ *
+ * Typically the U-Boot image is loaded from serial DataFlash into
+ * SDRAM by the samboot boot loader, which is located in internal
+ * NOR Flash and provides all essential initializations like CPU
+ * and peripheral clocks and, of course, the SDRAM configuration.
+ *
+ * For testing purposes it is also possibly to directly transfer
+ * the image into SDRAM via JTAG. A tested configuration exists
+ * for the Turtelizer 2 hardware dongle and the OpenOCD software.
+ * In this case the latter will do the basic hardware configuration
+ * via its reset-init script.
+ *
+ * For additional information visit the project home page at
+ * http://www.ethernut.de/
+ */
+
+#include <common.h>
+#include <net.h>
+#include <netdev.h>
+#include <miiphy.h>
+#include <i2c.h>
+#include <spi.h>
+#include <dataflash.h>
+#include <mmc.h>
+
+#include <asm/arch/at91sam9260.h>
+#include <asm/arch/at91sam9260_matrix.h>
+#include <asm/arch/at91sam9_smc.h>
+#include <asm/arch/at91_common.h>
+#include <asm/arch/at91_pmc.h>
+#include <asm/arch/at91_spi.h>
+#include <asm/arch/gpio.h>
+#include <asm/io.h>
+
+#include "ethernut5_pwrman.h"
+
+DECLARE_GLOBAL_DATA_PTR;
+
+AT91S_DATAFLASH_INFO dataflash_info[CONFIG_SYS_MAX_DATAFLASH_BANKS];
+
+struct dataflash_addr cs[CONFIG_SYS_MAX_DATAFLASH_BANKS] = {
+	{CONFIG_SYS_DATAFLASH_LOGIC_ADDR_CS0, 0}
+};
+
+/*
+ * In fact we have 7 partitions, but u-boot supports 5 only. This is
+ * no big deal, because the first partition is reserved for applications
+ * and the last one is used by Nut/OS. Both need not to be visible here.
+ */
+dataflash_protect_t area_list[NB_DATAFLASH_AREA] = {
+	{ 0x00021000, 0x00041FFF, FLAG_PROTECT_SET, 0, "setup" },
+	{ 0x00042000, 0x000C5FFF, FLAG_PROTECT_SET, 0, "uboot" },
+	{ 0x000C6000, 0x00359FFF, FLAG_PROTECT_SET, 0, "kernel" },
+	{ 0x0035A000, 0x003DDFFF, FLAG_PROTECT_SET, 0, "nutos" },
+	{ 0x003DE000, 0x003FEFFF, FLAG_PROTECT_CLEAR, 0, "env" }
+};
+
+/*
+ * This is called last during early initialization. Most of the basic
+ * hardware interfaces are up and running.
+ *
+ * The SDRAM hardware has been configured by the first stage boot loader.
+ * We only need to announce its size, using u-boot's memory check.
+ */
+int dram_init(void)
+{
+	gd->ram_size = get_ram_size(
+			(void *)CONFIG_SYS_SDRAM_BASE,
+			CONFIG_SYS_SDRAM_SIZE);
+	return 0;
+}
+
+#ifdef CONFIG_CMD_NAND
+static void ethernut5_nand_hw_init(void)
+{
+	struct at91_smc *smc = (struct at91_smc *)ATMEL_BASE_SMC;
+	struct at91_matrix *matrix = (struct at91_matrix *)ATMEL_BASE_MATRIX;
+	unsigned long csa;
+
+	/* Assign CS3 to NAND/SmartMedia Interface */
+	csa = readl(&matrix->ebicsa);
+	csa |= AT91_MATRIX_CS3A_SMC_SMARTMEDIA;
+	writel(csa, &matrix->ebicsa);
+
+	/* Configure SMC CS3 for NAND/SmartMedia */
+	writel(AT91_SMC_SETUP_NWE(1) | AT91_SMC_SETUP_NCS_WR(0) |
+		AT91_SMC_SETUP_NRD(1) | AT91_SMC_SETUP_NCS_RD(0),
+		&smc->cs[3].setup);
+	writel(AT91_SMC_PULSE_NWE(3) | AT91_SMC_PULSE_NCS_WR(3) |
+		AT91_SMC_PULSE_NRD(3) | AT91_SMC_PULSE_NCS_RD(3),
+		&smc->cs[3].pulse);
+	writel(AT91_SMC_CYCLE_NWE(5) | AT91_SMC_CYCLE_NRD(5),
+		&smc->cs[3].cycle);
+	writel(AT91_SMC_MODE_RM_NRD | AT91_SMC_MODE_WM_NWE |
+		AT91_SMC_MODE_EXNW_DISABLE |
+		AT91_SMC_MODE_DBW_8 |
+		AT91_SMC_MODE_TDF_CYCLE(2),
+		&smc->cs[3].mode);
+
+#ifdef CONFIG_SYS_NAND_READY_PIN
+	/* Ready pin is optional. */
+	at91_set_pio_input(CONFIG_SYS_NAND_READY_PIN, 1);
+#endif
+	at91_set_pio_output(CONFIG_SYS_NAND_ENABLE_PIN, 1);
+}
+#endif
+
+/*
+ * This is called first during late initialization.
+ */
+int board_init(void)
+{
+	struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
+
+	/* Enable clocks for all PIOs */
+	writel((1 << ATMEL_ID_PIOA) | (1 << ATMEL_ID_PIOB) |
+		(1 << ATMEL_ID_PIOC),
+		&pmc->pcer);
+	/* Set adress of boot parameters. */
+	gd->bd->bi_boot_params = CONFIG_SYS_SDRAM_BASE + 0x100;
+	/* Initialize UARTs and power management. */
+	at91_seriald_hw_init();
+	ethernut5_power_init();
+#ifdef CONFIG_CMD_NAND
+	ethernut5_nand_hw_init();
+#endif
+#ifdef CONFIG_HAS_DATAFLASH
+	at91_spi0_hw_init(1 << 0);
+#endif
+	return 0;
+}
+
+#ifdef CONFIG_MACB
+/*
+ * This is optionally called last during late initialization.
+ */
+int board_eth_init(bd_t *bis)
+{
+	const char *devname;
+	unsigned short mode;
+	struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
+
+	/* Enable on-chip EMAC clock. */
+	writel(1 << ATMEL_ID_EMAC0, &pmc->pcer);
+	/* Need to reset PHY via power management. */
+	ethernut5_phy_reset();
+	/* Set peripheral pins. */
+	at91_macb_hw_init();
+	/* Basic EMAC initialization. */
+	if (macb_eth_initialize(0, (void *)ATMEL_BASE_EMAC0, CONFIG_PHY_ID))
+		return -1;
+	/*
+	 * Early board revisions have a pull-down at the PHY's MODE0
+	 * strap pin, which forces the PHY into power down. Here we
+	 * switch to all-capable mode.
+	 */
+	devname = miiphy_get_current_dev();
+	if (miiphy_read(devname, 0, 18, &mode) == 0) {
+		/* Set mode[2:0] to 0b111. */
+		mode |= 0x00E0;
+		miiphy_write(devname, 0, 18, mode);
+		/* Soft reset overrides strap pins. */
+		miiphy_write(devname, 0, MII_BMCR, BMCR_RESET);
+	}
+	/* Sync environment with network devices, needed for nfsroot. */
+	return eth_init(gd->bd);
+}
+#endif
+
+#ifdef CONFIG_GENERIC_ATMEL_MCI
+int board_mmc_init(bd_t *bd)
+{
+	struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
+
+	/* Enable MCI clock. */
+	writel(1 << ATMEL_ID_MCI, &pmc->pcer);
+	/* Initialize MCI hardware. */
+	at91_mci_hw_init();
+	/* Register the device. */
+	return atmel_mci_init((void *)ATMEL_BASE_MCI);
+}
+
+int board_mmc_getcd(u8 *cd, struct mmc *mmc)
+{
+	*cd = at91_get_pio_value(CONFIG_SYS_MMC_CD_PIN) ? 1 : 0;
+	return 0;
+}
+#endif
+
+#ifdef CONFIG_ATMEL_SPI
+/*
+ * Note, that u-boot uses different code for SPI bus access. While
+ * memory routines use automatic chip select control, the serial
+ * flash support requires 'manual' GPIO control. Thus, we switch
+ * modes.
+ */
+void spi_cs_activate(struct spi_slave *slave)
+{
+	/* Enable NPCS0 in GPIO mode. This disables peripheral control. */
+	at91_set_pio_output(AT91_PIO_PORTA, 3, 0);
+}
+
+void spi_cs_deactivate(struct spi_slave *slave)
+{
+	/* Disable NPCS0 in GPIO mode. */
+	at91_set_pio_output(AT91_PIO_PORTA, 3, 1);
+	/* Switch back to peripheral chip select control. */
+	at91_set_a_periph(AT91_PIO_PORTA, 3, 1);
+}
+
+int spi_cs_is_valid(unsigned int bus, unsigned int cs)
+{
+	return bus == 0 && cs == 0;
+}
+#endif
diff --git a/board/egnite/ethernut5/ethernut5_pwrman.c b/board/egnite/ethernut5/ethernut5_pwrman.c
new file mode 100644
index 0000000000..4b00038457
--- /dev/null
+++ b/board/egnite/ethernut5/ethernut5_pwrman.c
@@ -0,0 +1,338 @@
+/*
+ * (C) Copyright 2011
+ * egnite GmbH <info@egnite.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
+ */
+
+/*
+ * Ethernut 5 power management support
+ *
+ * This board may be supplied via USB, IEEE 802.3af PoE or an
+ * auxiliary DC input. An on-board ATmega168 microcontroller,
+ * the so called power management controller or PMC, is used
+ * to select the supply source and to switch on and off certain
+ * energy consuming board components. This allows to reduce the
+ * total stand-by consumption to less than 70mW.
+ *
+ * The main CPU communicates with the PMC via I2C. When
+ * CONFIG_CMD_BSP is defined in the board configuration file,
+ * then the board specific command 'pwrman' becomes available,
+ * which allows to manually deal with the PMC.
+ *
+ * Two distinct registers are provided by the PMC for enabling
+ * and disabling specific features. This avoids the often seen
+ * read-modify-write cycle or shadow register requirement.
+ * Additional registers are available to query the board
+ * status and temperature, the auxiliary voltage and to control
+ * the green user LED that is integrated in the reset switch.
+ *
+ * Note, that the AVR firmware of the PMC is released under BSDL.
+ *
+ * For additional information visit the project home page at
+ * http://www.ethernut.de/
+ */
+#include <common.h>
+#include <asm/arch/at91sam9260.h>
+#include <asm/arch/at91_common.h>
+#include <asm/arch/gpio.h>
+#include <asm/io.h>
+#include <i2c.h>
+
+#include "ethernut5_pwrman.h"
+
+/* PMC firmware version */
+static int pwrman_major;
+static int pwrman_minor;
+
+/*
+ * Enable Ethernut 5 power management.
+ *
+ * This function must be called during board initialization.
+ * While we are using u-boot's I2C subsystem, it may be required
+ * to enable the serial port before calling this function,
+ * in particular when debugging is enabled.
+ *
+ * If board specific commands are not available, we will activate
+ * all board components.
+ */
+void ethernut5_power_init(void)
+{
+	pwrman_minor = i2c_reg_read(PWRMAN_I2C_ADDR, PWRMAN_REG_VERS);
+	pwrman_major = pwrman_minor >> 4;
+	pwrman_minor &= 15;
+
+#ifndef CONFIG_CMD_BSP
+	/* Do not modify anything, if we do not have a known version. */
+	if (pwrman_major == 2) {
+		/* Without board specific commands we enable all features. */
+		i2c_reg_write(PWRMAN_I2C_ADDR, PWRMAN_REG_ENA, ~PWRMAN_ETHRST);
+		i2c_reg_write(PWRMAN_I2C_ADDR, PWRMAN_REG_DIS, PWRMAN_ETHRST);
+	}
+#endif
+}
+
+/*
+ * Reset Ethernet PHY.
+ *
+ * This function allows the re-configure the PHY after
+ * changing its strap pins.
+ */
+void ethernut5_phy_reset(void)
+{
+	/* Do not modify anything, if we do not have a known version. */
+	if (pwrman_major != 2)
+		return;
+
+	/*
+	 * Make sure that the Ethernet clock is enabled and the PHY reset
+	 * is disabled for at least 100 us.
+	 */
+	i2c_reg_write(PWRMAN_I2C_ADDR, PWRMAN_REG_ENA, PWRMAN_ETHCLK);
+	i2c_reg_write(PWRMAN_I2C_ADDR, PWRMAN_REG_DIS, PWRMAN_ETHRST);
+	udelay(100);
+
+	/*
+	 * LAN8710 strap pins are
+	 * PA14 => PHY MODE0
+	 * PA15 => PHY MODE1
+	 * PA17 => PHY MODE2 => 111b all capable
+	 * PA18 => PHY ADDR0 => 0b
+	 */
+	at91_set_pio_input(AT91_PIO_PORTA, 14, 1);
+	at91_set_pio_input(AT91_PIO_PORTA, 15, 1);
+	at91_set_pio_input(AT91_PIO_PORTA, 17, 1);
+	at91_set_pio_input(AT91_PIO_PORTA, 18, 0);
+
+	/* Activate PHY reset for 100 us. */
+	i2c_reg_write(PWRMAN_I2C_ADDR, PWRMAN_REG_ENA, PWRMAN_ETHRST);
+	udelay(100);
+	i2c_reg_write(PWRMAN_I2C_ADDR, PWRMAN_REG_DIS, PWRMAN_ETHRST);
+
+	at91_set_pio_input(AT91_PIO_PORTA, 14, 1);
+}
+
+/*
+ * Output the firmware version we got during initialization.
+ */
+void ethernut5_print_version(void)
+{
+	printf("%u.%u\n", pwrman_major, pwrman_minor);
+}
+
+/*
+ * All code below this point is optional and implements
+ * the 'pwrman' command.
+ */
+#ifdef CONFIG_CMD_BSP
+
+/* Human readable names of PMC features */
+char *pwrman_feat[8] = {
+	"board", "vbin", "vbout", "mmc",
+	"rs232", "ethclk", "ethrst", "wakeup"
+};
+
+/*
+ * Print all feature names, that have its related flags enabled.
+ */
+static void print_flagged_features(u8 flags)
+{
+	int i;
+
+	for (i = 0; i < 8; i++) {
+		if (flags & (1 << i))
+			printf("%s ", pwrman_feat[i]);
+	}
+}
+
+/*
+ * Return flags of a given list of feature names.
+ *
+ * The function stops at the first unknown list entry and
+ * returns the number of detected names as a function result.
+ */
+static int feature_flags(char * const names[], int num, u8 *flags)
+{
+	int i, j;
+
+	*flags = 0;
+	for (i = 0; i < num; i++) {
+		for (j = 0; j < 8; j++) {
+			if (strcmp(pwrman_feat[j], names[i]) == 0) {
+				*flags |= 1 << j;
+				break;
+			}
+		}
+		if (j > 7)
+			break;
+	}
+	return i;
+}
+
+void ethernut5_print_power(void)
+{
+	u8 flags;
+	int i;
+
+	flags = i2c_reg_read(PWRMAN_I2C_ADDR, PWRMAN_REG_ENA);
+	for (i = 0; i < 2; i++) {
+		if (flags) {
+			print_flagged_features(flags);
+			printf("%s\n", i ? "off" : "on");
+		}
+		flags = ~flags;
+	}
+}
+
+void ethernut5_print_celsius(void)
+{
+	int val;
+
+	/* Read ADC value from LM50 and return Celsius degrees. */
+	val = i2c_reg_read(PWRMAN_I2C_ADDR, PWRMAN_REG_TEMP);
+	val *= 5000;	/* 100mV/degree with 5V reference */
+	val += 128;	/* 8 bit resolution */
+	val /= 256;
+	val -= 450;	/* Celsius offset, still x10 */
+	/* Output full degrees. */
+	printf("%d\n", (val + 5) / 10);
+}
+
+void ethernut5_print_voltage(void)
+{
+	int val;
+
+	/* Read ADC value from divider and return voltage. */
+	val = i2c_reg_read(PWRMAN_I2C_ADDR, PWRMAN_REG_VAUX);
+	/* Resistors are 100k and 12.1k */
+	val += 5;
+	val *= 180948;
+	val /= 100000;
+	val++;
+	/* Calculation was done in 0.1V units. */
+	printf("%d\n", (val + 5) / 10);
+}
+
+/*
+ * Process the board specific 'pwrman' command.
+ */
+int do_pwrman(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+{
+	u8 val;
+	int i;
+
+	if (argc == 1) {
+		ethernut5_print_power();
+	} else if (argc == 2 && strcmp(argv[1], "reset") == 0) {
+		at91_set_pio_output(AT91_PIO_PORTB, 8, 1);
+		udelay(100);
+		at91_set_pio_output(AT91_PIO_PORTB, 8, 0);
+		udelay(100000);
+	} else if (argc == 2 && strcmp(argv[1], "temp") == 0) {
+		ethernut5_print_celsius();
+	} else if (argc == 2 && strcmp(argv[1], "vaux") == 0) {
+		ethernut5_print_voltage();
+	} else if (argc == 2 && strcmp(argv[1], "version") == 0) {
+		ethernut5_print_version();
+	} else if (strcmp(argv[1], "led") == 0) {
+		/* Control the green status LED. Blink frequency unit
+		** is 0.1s, very roughly. */
+		if (argc == 2) {
+			/* No more arguments, output current settings. */
+			val = i2c_reg_read(PWRMAN_I2C_ADDR, PWRMAN_REG_LEDCTL);
+			printf("led %u %u\n", val >> 4, val & 15);
+		} else {
+			/* First argument specifies the on-time. */
+			val = (u8) simple_strtoul(argv[2], NULL, 0);
+			val <<= 4;
+			if (argc > 3) {
+				/* Second argument specifies the off-time. */
+				val |= (u8) (simple_strtoul(argv[3], NULL, 0)
+						& 15);
+			}
+			/* Update the LED control register. */
+			i2c_reg_write(PWRMAN_I2C_ADDR, PWRMAN_REG_LEDCTL, val);
+		}
+	} else {
+		/* We expect a list of features followed an optional status. */
+		argc--;
+		i = feature_flags(&argv[1], argc, &val);
+		if (argc == i) {
+			/* We got a list only, print status. */
+			val &= i2c_reg_read(PWRMAN_I2C_ADDR, PWRMAN_REG_STA);
+			if (val) {
+				if (i > 1)
+					print_flagged_features(val);
+				printf("active\n");
+			} else {
+				printf("inactive\n");
+			}
+		} else {
+			/* More arguments. */
+			if (i == 0) {
+				/* No given feature, use despensibles. */
+				val = PWRMAN_DISPENSIBLE;
+			}
+			if (strcmp(argv[i + 1], "on") == 0) {
+				/* Enable features. */
+				i2c_reg_write(PWRMAN_I2C_ADDR, PWRMAN_REG_ENA,
+						val);
+			} else if (strcmp(argv[i + 1], "off") == 0) {
+				/* Disable features. */
+				i2c_reg_write(PWRMAN_I2C_ADDR, PWRMAN_REG_DIS,
+						val);
+			} else {
+				printf("Bad parameter %s\n", argv[i + 1]);
+				return 1;
+			}
+		}
+	}
+	return 0;
+}
+
+U_BOOT_CMD(
+	pwrman,	CONFIG_SYS_MAXARGS, 1, do_pwrman,
+	"power management",
+		   "- print settings\n"
+	"pwrman feature ...\n"
+	"       - print status\n"
+	"pwrman [feature ...] on|off\n"
+	"       - enable/disable specified or all dispensible features\n"
+	"pwrman led [on-time [off-time]]\n"
+	"       - print or set led blink timer\n"
+	"pwrman temp\n"
+	"       - print board temperature (Celsius)\n"
+	"pwrman vaux\n"
+	"       - print auxiliary input voltage\n"
+	"pwrman reset\n"
+	"       - reset power management controller\n"
+	"pwrman version\n"
+	"       - print firmware version\n"
+	"\n"
+	"        features, (*)=dispensible:\n"
+	"          board  - 1.8V and 3.3V supply\n"
+	"          vbin   - supply via USB device connector\n"
+	"          vbout  - USB host connector supply(*)\n"
+	"          mmc    - MMC slot supply(*)\n"
+	"          rs232  - RS232 driver\n"
+	"          ethclk - Ethernet PHY clock(*)\n"
+	"          ethrst - Ethernet PHY reset\n"
+	"          wakeup - RTC alarm"
+);
+#endif /* CONFIG_CMD_BSP */
diff --git a/board/egnite/ethernut5/ethernut5_pwrman.h b/board/egnite/ethernut5/ethernut5_pwrman.h
new file mode 100644
index 0000000000..054188408a
--- /dev/null
+++ b/board/egnite/ethernut5/ethernut5_pwrman.h
@@ -0,0 +1,68 @@
+/*
+ * (C) Copyright 2011
+ * egnite GmbH <info@egnite.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
+ */
+
+/*
+ * Ethernut 5 power management support
+ *
+ * For additional information visit the project home page at
+ * http://www.ethernut.de/
+ */
+
+/* I2C address of the PMC */
+#define PWRMAN_I2C_ADDR 0x22
+
+/* PMC registers */
+#define PWRMAN_REG_VERS		0	/* Version register */
+#define PWRMAN_REG_STA		1	/* Feature status register */
+#define PWRMAN_REG_ENA		2	/* Feature enable register */
+#define PWRMAN_REG_DIS		3	/* Feature disable register */
+#define PWRMAN_REG_TEMP		4	/* Board temperature */
+#define PWRMAN_REG_VAUX		6	/* Auxiliary input voltage */
+#define PWRMAN_REG_LEDCTL	8	/* LED blinking timer. */
+
+/* Feature flags used in status, enable and disable registers */
+#define PWRMAN_BOARD	0x01	/* 1.8V and 3.3V supply */
+#define PWRMAN_VBIN	0x02	/* VBUS input at device connector */
+#define PWRMAN_VBOUT	0x04	/* VBUS output at host connector */
+#define PWRMAN_MMC	0x08	/* Memory card supply */
+#define PWRMAN_RS232	0x10	/* RS-232 driver shutdown */
+#define PWRMAN_ETHCLK	0x20	/* Ethernet clock enable */
+#define PWRMAN_ETHRST	0x40	/* Ethernet PHY reset */
+#define PWRMAN_WAKEUP	0x80	/* RTC wake-up */
+
+/* Features, which are not essential to keep u-boot alive */
+#define PWRMAN_DISPENSIBLE	(PWRMAN_VBOUT | PWRMAN_MMC | PWRMAN_ETHCLK)
+
+/* Enable Ethernut 5 power management. */
+extern void ethernut5_power_init(void);
+
+/* Reset Ethernet PHY. */
+extern void ethernut5_phy_reset(void);
+
+extern void ethernut5_print_version(void);
+
+#ifdef CONFIG_CMD_BSP
+extern void ethernut5_print_power(void);
+extern void ethernut5_print_celsius(void);
+extern void ethernut5_print_voltage(void);
+#endif