[U-Boot] [PATCH 1/1] arm: mvebu: Add CRS305-1G-4S board
Luka Kovačič
me at lukakovacic.xyz
Fri May 3 21:36:24 UTC 2019
On 2019-05-03 12:37, Chris Packham wrote:
> On Fri, May 3, 2019 at 4:36 AM Luka Kovacic <me at lukakovacic.xyz> wrote:
>>
>> CRS305-1G-4S has a switch chip with an integrated CPU (98DX3236) and
>> like some of the
>> other simillar boards requires bin_hdr. bin_hdr (DDR3 init stage) is
>> currently retrieved
>> from the stock bootloader and compiled into the kwb image.
>>
>> Adds support for U-Boot, enable UART, SPI, Winbond SPI flash chip
>> support and writing env to SPI flash.
>>
>> arch/arm/dts: Remove unused parameters in DTS for crs305-1g-4s
>>
>> arch/arm/mach-mvebu: Set the proper processor for crs305-1g-4s
>> (98DX3236)
>> ---
>> arch/arm/dts/Makefile | 3 +-
>> .../dts/armada-xp-crs305-1g-4s-u-boot.dtsi | 13 +++
>> arch/arm/dts/armada-xp-crs305-1g-4s.dts | 110
>> ++++++++++++++++++
>> arch/arm/mach-mvebu/Kconfig | 7 ++
>> board/mikrotik/crs305-1g-4s/.gitignore | 1 +
>> board/mikrotik/crs305-1g-4s/MAINTAINERS | 7 ++
>> board/mikrotik/crs305-1g-4s/Makefile | 14 +++
>> board/mikrotik/crs305-1g-4s/README | 23 ++++
>> board/mikrotik/crs305-1g-4s/binary.0 | 11 ++
>> board/mikrotik/crs305-1g-4s/crs305-1g-4s.c | 68 +++++++++++
>> board/mikrotik/crs305-1g-4s/kwbimage.cfg.in | 12 ++
>> configs/crs305-1g-4s_defconfig | 51 ++++++++
>> include/configs/crs305-1g-4s.h | 37 ++++++
>> 13 files changed, 356 insertions(+), 1 deletion(-)
>> create mode 100644 arch/arm/dts/armada-xp-crs305-1g-4s-u-boot.dtsi
>> create mode 100644 arch/arm/dts/armada-xp-crs305-1g-4s.dts
>> create mode 100644 board/mikrotik/crs305-1g-4s/.gitignore
>> create mode 100644 board/mikrotik/crs305-1g-4s/MAINTAINERS
>> create mode 100644 board/mikrotik/crs305-1g-4s/Makefile
>> create mode 100644 board/mikrotik/crs305-1g-4s/README
>> create mode 100644 board/mikrotik/crs305-1g-4s/binary.0
>> create mode 100644 board/mikrotik/crs305-1g-4s/crs305-1g-4s.c
>> create mode 100644 board/mikrotik/crs305-1g-4s/kwbimage.cfg.in
>> create mode 100644 configs/crs305-1g-4s_defconfig
>> create mode 100644 include/configs/crs305-1g-4s.h
>>
>> diff --git a/arch/arm/dts/Makefile b/arch/arm/dts/Makefile
>> index dfa5b02958..f463485149 100644
>> --- a/arch/arm/dts/Makefile
>> +++ b/arch/arm/dts/Makefile
>> @@ -161,7 +161,8 @@ dtb-$(CONFIG_ARCH_MVEBU) += \
>> armada-38x-controlcenterdc.dtb \
>> armada-385-atl-x530.dtb \
>> armada-385-atl-x530DP.dtb \
>> - armada-xp-db-xc3-24g4xg.dtb
>> + armada-xp-db-xc3-24g4xg.dtb \
>> + armada-xp-crs305-1g-4s.dtb
>>
>> dtb-$(CONFIG_ARCH_UNIPHIER_LD11) += \
>> uniphier-ld11-global.dtb \
>> diff --git a/arch/arm/dts/armada-xp-crs305-1g-4s-u-boot.dtsi
>> b/arch/arm/dts/armada-xp-crs305-1g-4s-u-boot.dtsi
>> new file mode 100644
>> index 0000000000..8576a02730
>> --- /dev/null
>> +++ b/arch/arm/dts/armada-xp-crs305-1g-4s-u-boot.dtsi
>> @@ -0,0 +1,13 @@
>> +// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
>> +
>> +&uart0 {
>> + u-boot,dm-pre-reloc;
>> +};
>> +
>> +&spi0 {
>> + u-boot,dm-pre-reloc;
>> +
>> + spi-flash at 0 {
>> + u-boot,dm-pre-reloc;
>> + };
>> +};
>> diff --git a/arch/arm/dts/armada-xp-crs305-1g-4s.dts
>> b/arch/arm/dts/armada-xp-crs305-1g-4s.dts
>> new file mode 100644
>> index 0000000000..1116f5c96c
>> --- /dev/null
>> +++ b/arch/arm/dts/armada-xp-crs305-1g-4s.dts
>> @@ -0,0 +1,110 @@
>> +// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
>> +/*
>> + * Device Tree file for CRS305-1G-4S board
>> + *
>> + * Copyright (C) 2016 Allied Telesis Labs
>> + *
>> + * Based on armada-xp-db.dts
>> + *
>> + * Note: this Device Tree assumes that the bootloader has remapped
>> the
>> + * internal registers to 0xf1000000 (instead of the default
>> + * 0xd0000000). The 0xf1000000 is the default used by the recent,
>> + * DT-capable, U-Boot bootloaders provided by Marvell. Some earlier
>> + * boards were delivered with an older version of the bootloader that
>> + * left internal registers mapped at 0xd0000000. If you are in this
>> + * situation, you should either update your bootloader (preferred
>> + * solution) or the below Device Tree should be adjusted.
>> + */
>> +
>> +/dts-v1/;
>> +#include "armada-xp-98dx3236.dtsi"
>> +#include "armada-xp-crs305-1g-4s-u-boot.dtsi"
>> +
>> +/ {
>> + model = "CRS305-1G-4S";
>> + compatible = "marvell,armadaxp-98dx3236",
>> "marvell,armadaxp-mv78260", "marvell,armadaxp",
>> "marvell,armada-370-xp";
>> +
>> + chosen {
>> + stdout-path = "serial0:115200n8";
>> + bootargs = "console=ttyS0,115200 earlyprintk";
>> + };
>> +
>> + aliases {
>> + spi0 = &spi0;
>> + };
>> +
>> + memory {
>> + device_type = "memory";
>> + reg = <0 0x00000000 0 0x20000000>; /* 512 MB */
>> + };
>> +};
>> +
>> +&L2 {
>> + arm,parity-enable;
>> + marvell,ecc-enable;
>> +};
>> +
>> +&devbus_bootcs {
>> + status = "okay";
>> +
>> + /* Device Bus parameters are required */
>> +
>> + /* Read parameters */
>> + devbus,bus-width = <16>;
>> + devbus,turn-off-ps = <60000>;
>> + devbus,badr-skew-ps = <0>;
>> + devbus,acc-first-ps = <124000>;
>> + devbus,acc-next-ps = <248000>;
>> + devbus,rd-setup-ps = <0>;
>> + devbus,rd-hold-ps = <0>;
>> +
>> + /* Write parameters */
>> + devbus,sync-enable = <0>;
>> + devbus,wr-high-ps = <60000>;
>> + devbus,wr-low-ps = <60000>;
>> + devbus,ale-wr-ps = <60000>;
>> +};
>> +
>> +&uart0 {
>> + status = "okay";
>> +};
>> +
>> +&uart1 {
>> + status = "okay";
>> +};
>> +
>> +&i2c0 {
>> + clock-frequency = <100000>;
>> + status = "okay";
>> +};
>> +
>> +&usb0 {
>> + status = "okay";
>> +};
>> +
>> +&spi0 {
>> + status = "okay";
>> +
>> + spi-flash at 0 {
>> + #address-cells = <1>;
>> + #size-cells = <1>;
>> + compatible = "spi-flash", "jedec,spi-nor";
>> + reg = <0>; /* Chip select 0 */
>> + spi-max-frequency = <108000000>;
>> + m25p,fast-read;
>> +
>> + partition at u-boot {
>> + reg = <0x00000000 0x00100000>;
>> + label = "u-boot";
>> + };
>> + partition at u-boot-env {
>> + reg = <0x00100000 0x00040000>;
>> + label = "u-boot-env";
>> + };
>> + partition at unused {
>> + reg = <0x00140000 0x00ec0000>;
>> + label = "unused";
>> + };
>> +
>> + };
>> +};
>> diff --git a/arch/arm/mach-mvebu/Kconfig b/arch/arm/mach-mvebu/Kconfig
>> index f99bd3bf65..1d49d49203 100644
>> --- a/arch/arm/mach-mvebu/Kconfig
>> +++ b/arch/arm/mach-mvebu/Kconfig
>> @@ -157,6 +157,10 @@ config TARGET_DB_XC3_24G4XG
>> bool "Support DB-XC3-24G4XG"
>> select 98DX3336
>>
>> +config TARGET_CRS305_1G_4S
>> + bool "Support CRS305-1G-4S"
>> + select 98DX3236
>> +
>> endchoice
>>
>> config SYS_BOARD
>> @@ -176,6 +180,7 @@ config SYS_BOARD
>> default "a38x" if TARGET_CONTROLCENTERDC
>> default "x530" if TARGET_X530
>> default "db-xc3-24g4xg" if TARGET_DB_XC3_24G4XG
>> + default "crs305-1g-4s" if TARGET_CRS305_1G_4S
>>
>> config SYS_CONFIG_NAME
>> default "clearfog" if TARGET_CLEARFOG
>> @@ -194,6 +199,7 @@ config SYS_CONFIG_NAME
>> default "controlcenterdc" if TARGET_CONTROLCENTERDC
>> default "x530" if TARGET_X530
>> default "db-xc3-24g4xg" if TARGET_DB_XC3_24G4XG
>> + default "crs305-1g-4s" if TARGET_CRS305_1G_4S
>>
>> config SYS_VENDOR
>> default "Marvell" if TARGET_DB_MV784MP_GP
>> @@ -211,6 +217,7 @@ config SYS_VENDOR
>> default "CZ.NIC" if TARGET_TURRIS_MOX
>> default "gdsys" if TARGET_CONTROLCENTERDC
>> default "alliedtelesis" if TARGET_X530
>> + default "mikrotik" if TARGET_CRS305_1G_4S
>>
>> config SYS_SOC
>> default "mvebu"
>> diff --git a/board/mikrotik/crs305-1g-4s/.gitignore
>> b/board/mikrotik/crs305-1g-4s/.gitignore
>> new file mode 100644
>> index 0000000000..775b9346b8
>> --- /dev/null
>> +++ b/board/mikrotik/crs305-1g-4s/.gitignore
>> @@ -0,0 +1 @@
>> +kwbimage.cfg
>> diff --git a/board/mikrotik/crs305-1g-4s/MAINTAINERS
>> b/board/mikrotik/crs305-1g-4s/MAINTAINERS
>> new file mode 100644
>> index 0000000000..3823489600
>> --- /dev/null
>> +++ b/board/mikrotik/crs305-1g-4s/MAINTAINERS
>> @@ -0,0 +1,7 @@
>> +CRS305-1G-4S BOARD
>> +M: Luka Kovacic <me at lukakovacic.xyz>
>> +S: Maintained
>> +F: board/mikrotik/crs305-1g-4s/
>> +F: include/configs/crs305-1g-4s.h
>> +F: configs/crs305-1g-4s_defconfig
>> +F: arch/arm/dts/armada-xp-crs305-1g-4s.dts
>> diff --git a/board/mikrotik/crs305-1g-4s/Makefile
>> b/board/mikrotik/crs305-1g-4s/Makefile
>> new file mode 100644
>> index 0000000000..895331beb8
>> --- /dev/null
>> +++ b/board/mikrotik/crs305-1g-4s/Makefile
>> @@ -0,0 +1,14 @@
>> +# SPDX-License-Identifier: GPL-2.0+
>> +#
>> +# Copyright (C) 2015 Stefan Roese <sr at denx.de>
>> +
>> +obj-y := crs305-1g-4s.o
>> +extra-y := kwbimage.cfg
>> +
>> +quiet_cmd_sed = SED $@
>> + cmd_sed = sed $(SEDFLAGS_$(@F)) $< >$(dir $<)$(@F)
>> +
>> +SEDFLAGS_kwbimage.cfg =-e "s|^BINARY.*|BINARY
>> $(srctree)/$(@D)/binary.0 0000005b 00000068|"
>> +$(src)/kwbimage.cfg: $(src)/kwbimage.cfg.in include/autoconf.mk \
>> + include/config/auto.conf
>> + $(call if_changed,sed)
>> diff --git a/board/mikrotik/crs305-1g-4s/README
>> b/board/mikrotik/crs305-1g-4s/README
>> new file mode 100644
>> index 0000000000..f420aabfbf
>> --- /dev/null
>> +++ b/board/mikrotik/crs305-1g-4s/README
>> @@ -0,0 +1,23 @@
>> +MikroTik CRS305-1G-4S+IN
>> +========================
>> +
>> +CRS305-1G-4S+IN is a 4x SFP+ switch with a Gigabit Ethernet port for
>> management.
>> +Specifications:
>> + - Marvell Prestera 98DX3236 switch with an integrated ARMv7 CPU
>> + - 512 MB DDR3 RAM
>> + - UART @ 115200bps
>> + - 4x SFP+
>> + - Gigabit Ethernet (AR8033)
>> + - 16 MB SPI flash (Winbond 25Q128JVSM)
>> +
>> +Currently supported hardware:
>> + - UART boot (using kwboot) and console
>> + - SPI boot, environment and load kernel
>> +
>> +Planned:
>> + - Gigabit Ethernet support
>> +
>> +Getting binary.0
>> +================
>> +binary.0 (DDR3 init phase) can be retrieved/extracted from the
>> integrated bootloader on the SPI flash.
>> +Then binary.0 can be replaced with the extracted blob.
>> diff --git a/board/mikrotik/crs305-1g-4s/binary.0
>> b/board/mikrotik/crs305-1g-4s/binary.0
>> new file mode 100644
>> index 0000000000..8dd687286a
>> --- /dev/null
>> +++ b/board/mikrotik/crs305-1g-4s/binary.0
>> @@ -0,0 +1,11 @@
>> +--------
>> +WARNING:
>> +--------
>> +This file should contain the bin_hdr generated by the original
>> Marvell
>> +U-Boot implementation. As this is currently not included in this
>> +U-Boot version, we have added this placeholder, so that the U-Boot
>> +image can be generated without errors.
>> +
>> +If you have a known to be working bin_hdr for your board, then you
>> +just need to replace this text file here with the binary header
>> +and recompile U-Boot.
>> diff --git a/board/mikrotik/crs305-1g-4s/crs305-1g-4s.c
>> b/board/mikrotik/crs305-1g-4s/crs305-1g-4s.c
>> new file mode 100644
>> index 0000000000..cae428ffd0
>> --- /dev/null
>> +++ b/board/mikrotik/crs305-1g-4s/crs305-1g-4s.c
>> @@ -0,0 +1,68 @@
>> +// SPDX-License-Identifier: GPL-2.0+
>> +/*
>> + * Copyright (C) 2015 Stefan Roese <sr at denx.de>
>> + */
>> +
>> +#include <common.h>
>> +#include <i2c.h>
>> +#include <asm/gpio.h>
>> +#include <linux/mbus.h>
>> +#include <linux/io.h>
>> +#include <asm/arch/cpu.h>
>> +#include <asm/arch/soc.h>
>> +
>> +DECLARE_GLOBAL_DATA_PTR;
>> +
>> +/*
>> + * These values and defines are taken from the Marvell U-Boot version
>> + * "u-boot-2013.01-2016_T1.0.eng_drop_v6"
>> + */
>> +#define DB_DX_AC3_GPP_OUT_ENA_LOW (~(BIT(0) | BIT(2) | BIT(3) |
>> BIT(4) | BIT(6) | BIT(12) \
>> + | BIT(13) | BIT(16) | BIT(17)
>> | BIT(20) | BIT(29) | BIT(30)))
>> +#define DB_DX_AC3_GPP_OUT_ENA_MID (~(0))
>> +#define DB_DX_AC3_GPP_OUT_VAL_LOW (BIT(0) | BIT(2) | BIT(3) |
>> BIT(4) | BIT(6) | BIT(12) \
>> + | BIT(13) | BIT(16) | BIT(17)
>> | BIT(20) | BIT(29) | BIT(30))
>> +#define DB_DX_AC3_GPP_OUT_VAL_MID 0x0
>> +#define DB_DX_AC3_GPP_POL_LOW 0x0
>> +#define DB_DX_AC3_GPP_POL_MID 0x0
>
> If you've got access to the original bootloader/system it might pay to
> dump out the values from that. These are from the Marvell DB board and
> are more than likely wrong for the MicroTik board.
>
>> +
>> +int board_early_init_f(void)
>> +{
>> + /* Configure MPP */
>> + writel(0x00142222, MVEBU_MPP_BASE + 0x00);
>> + writel(0x11122000, MVEBU_MPP_BASE + 0x04);
>> + writel(0x44444004, MVEBU_MPP_BASE + 0x08);
>> + writel(0x14444444, MVEBU_MPP_BASE + 0x0c);
>> + writel(0x00000001, MVEBU_MPP_BASE + 0x10);
>> +
>> + /* Set GPP Out value */
>> + writel(DB_DX_AC3_GPP_OUT_VAL_LOW, MVEBU_GPIO0_BASE + 0x00);
>> + writel(DB_DX_AC3_GPP_OUT_VAL_MID, MVEBU_GPIO1_BASE + 0x00);
>> +
>> + /* Set GPP Polarity */
>> + writel(DB_DX_AC3_GPP_POL_LOW, MVEBU_GPIO0_BASE + 0x0c);
>> + writel(DB_DX_AC3_GPP_POL_MID, MVEBU_GPIO1_BASE + 0x0c);
>> +
>> + /* Set GPP Out Enable */
>> + writel(DB_DX_AC3_GPP_OUT_ENA_LOW, MVEBU_GPIO0_BASE + 0x04);
>> + writel(DB_DX_AC3_GPP_OUT_ENA_MID, MVEBU_GPIO1_BASE + 0x04);
>> +
>> + return 0;
>> +}
>> +
>> +int board_init(void)
>> +{
>> + /* address of boot parameters */
>> + gd->bd->bi_boot_params = mvebu_sdram_bar(0) + 0x100;
>> +
>> + return 0;
>> +}
>> +
>> +#ifdef CONFIG_DISPLAY_BOARDINFO
>> +int checkboard(void)
>> +{
>> + puts("Board: " CONFIG_SYS_BOARD "\n");
>> +
>> + return 0;
>> +}
>> +#endif
>> diff --git a/board/mikrotik/crs305-1g-4s/kwbimage.cfg.in
>> b/board/mikrotik/crs305-1g-4s/kwbimage.cfg.in
>> new file mode 100644
>> index 0000000000..2dbbbd0246
>> --- /dev/null
>> +++ b/board/mikrotik/crs305-1g-4s/kwbimage.cfg.in
>> @@ -0,0 +1,12 @@
>> +#
>> +# Copyright (C) 2014 Stefan Roese <sr at denx.de>
>> +#
>> +
>> +# Armada XP uses version 1 image format
>> +VERSION 1
>> +
>> +# Boot Media configurations
>> +BOOT_FROM spi
>> +
>> +# Binary Header (bin_hdr) with DDR3 training code
>> +BINARY board/mikrotik/crs305-1g-4s/binary.0 0000005b 00000068
>> diff --git a/configs/crs305-1g-4s_defconfig
>> b/configs/crs305-1g-4s_defconfig
>> new file mode 100644
>> index 0000000000..e5c83f7bb4
>> --- /dev/null
>> +++ b/configs/crs305-1g-4s_defconfig
>> @@ -0,0 +1,51 @@
>> +CONFIG_ARM=y
>> +CONFIG_ARCH_MVEBU=y
>> +CONFIG_SYS_TEXT_BASE=0x00800000
>> +CONFIG_SYS_MALLOC_F_LEN=0x2000
>> +CONFIG_TARGET_CRS305_1G_4S=y
>> +CONFIG_BUILD_TARGET="u-boot.kwb"
>> +CONFIG_SYS_CONSOLE_INFO_QUIET=y
>> +CONFIG_CMD_MEMTEST=y
>> +CONFIG_SYS_ALT_MEMTEST=y
>> +# CONFIG_CMD_FLASH is not set
>> +CONFIG_CMD_I2C=y
>> +CONFIG_CMD_SF=y
>> +CONFIG_CMD_SPI=y
>> +# CONFIG_CMD_USB is not set
>> +# CONFIG_CMD_SETEXPR is not set
>> +CONFIG_CMD_DHCP=y
>> +CONFIG_CMD_TFTPPUT=y
>> +CONFIG_CMD_MII=y
>> +CONFIG_CMD_PING=y
>> +CONFIG_CMD_CACHE=y
>> +CONFIG_CMD_TIME=y
>> +CONFIG_CMD_EXT2=y
>> +CONFIG_CMD_EXT4=y
>> +CONFIG_CMD_FAT=y
>> +CONFIG_CMD_FS_GENERIC=y
>> +CONFIG_CMD_UBI=y
>> +CONFIG_DEFAULT_DEVICE_TREE="armada-xp-crs305-1g-4s"
>> +CONFIG_ENV_IS_IN_SPI_FLASH=y
>> +CONFIG_BLK=y
>> +CONFIG_DM_I2C=y
>> +CONFIG_SYS_I2C_MVTWSI=y
>> +# CONFIG_MMC is not set
>> +CONFIG_MTD=y
>> +CONFIG_MTD_DEVICE=y
>> +# CONFIG_NAND is not set
>> +CONFIG_SPI_FLASH=y
>> +CONFIG_SPI_FLASH_SFDP_SUPPORT=y
>> +CONFIG_SPI_FLASH_MACRONIX=y
>> +CONFIG_SPI_FLASH_STMICRO=y
>> +CONFIG_SPI_FLASH_SST=y
>> +CONFIG_SPI_FLASH_WINBOND=y
>> +# CONFIG_SPI_FLASH_USE_4K_SECTORS is not set
>> +CONFIG_PCI=y
>> +CONFIG_PCI_MVEBU=y
>> +CONFIG_SYS_NS16550=y
>> +CONFIG_KIRKWOOD_SPI=y
>> +# CONFIG_USB is not set
>> +# CONFIG_DM_USB is not set
>> +# CONFIG_USB_EHCI_HCD is not set
>> +# CONFIG_USB_STORAGE is not set
>> +# CONFIG_USB_HOST_ETHER is not set
>> diff --git a/include/configs/crs305-1g-4s.h
>> b/include/configs/crs305-1g-4s.h
>> new file mode 100644
>> index 0000000000..c73cb99b1b
>> --- /dev/null
>> +++ b/include/configs/crs305-1g-4s.h
>> @@ -0,0 +1,37 @@
>> +/* SPDX-License-Identifier: GPL-2.0+ */
>> +/*
>> + * Copyright (C) 2014 Stefan Roese <sr at denx.de>
>> + */
>> +
>> +#ifndef _CONFIG_CRS305_1G_4S_H
>> +#define _CONFIG_CRS305_1G_4S_H
>> +
>> +/*
>> + * High Level Configuration Options (easy to change)
>> + */
>> +
>> +#define CONFIG_SYS_KWD_CONFIG $(CONFIG_BOARDDIR)/kwbimage.cfg
>> +#define CONFIG_SYS_TCLK 200000000 /* 200MHz */
>> +
>> +/* USB/EHCI configuration */
>> +#define CONFIG_EHCI_IS_TDI
>> +
>> +/* Environment in SPI NOR flash */
>> +#define CONFIG_ENV_OFFSET (1 << 20) /* 1MiB in */
>> +#define CONFIG_ENV_SIZE (64 << 10) /* 64KiB */
>> +#define CONFIG_ENV_SECT_SIZE (256 << 10) /* 256KiB sectors
>> */
>> +
>> +/* Keep device tree and initrd in lower memory so the kernel can
>> access them */
>> +#define CONFIG_EXTRA_ENV_SETTINGS \
>> + "fdt_high=0x10000000\0" \
>> + "initrd_high=0x10000000\0"
>> +
>> +/*
>> + * mv-common.h should be defined after CMD configs since it used them
>> + * to enable certain macros
>> + */
>> +#include "mv-common.h"
>> +#undef CONFIG_SYS_MAXARGS
>> +#define CONFIG_SYS_MAXARGS 96
>> +
>> +#endif /* _CONFIG_CRS305_1G_4S_H */
>> --
>> 2.20.1
>>
I don't have access to the original bootloader source code, just the
binary blob.
GPIO0 is the User LED on the MikroTik board and GPIO1 is a reset button.
It seems that it works fine.
I will send a new patch. I have commented out GPIO1 writel, I might use
GPIO1 later for resetting the board.
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