arm: Add support for LEGO MINDSTORMS EV3
Subsystems (3)
PATCH 1/1 arm: Add support for LEGO MINDSTORMS EV3
This is based on the davinci da850evm. It can boot from either the on-board 16MB flash or from a microSD card. It also reads board information from an I2C EEPROM.
The EV3 itself initally boots from write-protected EEPROM, so no u-boot SPL is needed.
Signed-off-by David Lechner <[email protected]>
--- arch/arm/mach-davinci/Kconfig | 4 + arch/arm/mach-davinci/da850_pinmux.c | 10 + arch/arm/mach-davinci/include/mach/hardware.h | 1 + board/lego/ev3/Kconfig | 12 ++ board/lego/ev3/MAINTAINERS | 6 + board/lego/ev3/Makefile | 10 + board/lego/ev3/README | 32 ++++ board/lego/ev3/legoev3.c | 176 ++++++++++++++++++ configs/legoev3_defconfig | 12 ++ include/configs/legoev3.h | 255 ++++++++++++++++++++++++++ 10 files changed, 518 insertions(+) create mode 100644 board/lego/ev3/Kconfig create mode 100644 board/lego/ev3/MAINTAINERS create mode 100644 board/lego/ev3/Makefile create mode 100644 board/lego/ev3/README create mode 100644 board/lego/ev3/legoev3.c create mode 100644 configs/legoev3_defconfig create mode 100644 include/configs/legoev3.h
arch/arm/mach-davinci/Kconfig +4 -0
@@ -22,6 +22,9 @@ config TARGET_OMAPL138_LCDK config TARGET_CALIMAIN bool "Calimain board" +config TARGET_LEGOEV3 + bool "LEGO MINDSTORMS EV3" + endchoice config SYS_SOC
@@ -31,5 +34,6 @@ source "board/Barix/ipam390/Kconfig" source "board/davinci/da8xxevm/Kconfig" source "board/davinci/ea20/Kconfig" source "board/omicron/calimain/Kconfig" +source "board/lego/ev3/Kconfig" endif
arch/arm/mach-davinci/da850_pinmux.c +10 -0
@@ -12,6 +12,16 @@#include <asm/arch/pinmux_defs.h> /* SPI pin muxer settings */ +const struct pinmux_config spi0_pins_base[] = { + {pinmux (3 ),1 ,0 },/* SPI0_CLK */ + {pinmux (3 ),1 ,2 },/* SPI0_SOMI */ + {pinmux (3 ),1 ,3 },/* SPI0_SIMO */ +}; + +const struct pinmux_config spi0_pins_scs0[] = { + {pinmux (4 ),1 ,1 },/* SPI0_SCS[0] */ +}; +const struct pinmux_config spi1_pins_base[] = { {pinmux (5 ),1 ,2 },/* SPI1_CLK */ {pinmux (5 ),1 ,4 },/* SPI1_SOMI */
arch/arm/mach-davinci/include/mach/hardware.h +1 -0
@@ -503,6 +503,7 @@ struct davinci_syscfg_regs {#define DAVINCI_SYSCFG_SUSPSRC_SPI0 (1 << 21)#define DAVINCI_SYSCFG_SUSPSRC_SPI1 (1 << 22)#define DAVINCI_SYSCFG_SUSPSRC_UART0 (1 << 18) +#define DAVINCI_SYSCFG_SUSPSRC_UART1 (1 << 19)#define DAVINCI_SYSCFG_SUSPSRC_UART2 (1 << 20)#define DAVINCI_SYSCFG_SUSPSRC_TIMER0 (1 << 27)
board/lego/ev3/Kconfig new file +12 -0
@@ -0,0 +1,12 @@ +if TARGET_LEGOEV3 + +config SYS_BOARD + default "ev3" + +config SYS_VENDOR + default "lego" + +config SYS_CONFIG_NAME + default "legoev3" + +endif
board/lego/ev3/MAINTAINERS new file +6 -0
@@ -0,0 +1,6 @@ +LEGOEV3 BOARD +M: David Lechner <[email protected]> +S: Maintained +F: board/lego/ev3/ +F: include/configs/legoev3.h +F: configs/legoev3_defconfig
board/lego/ev3/Makefile new file +10 -0
@@ -0,0 +1,10 @@ +# +# (C) Copyright 2000, 2001, 2002 +# Wolfgang Denk, DENX Software Engineering, wd at denx.de. +# +# Copyright (C) 2007 Sergey Kubushyn <[email protected]> +# +# SPDX-License-Identifier: GPL-2.0+ +# + +obj-y += legoev3.o
board/lego/ev3/README new file +32 -0
@@ -0,0 +1,32 @@ +Summary +======= + +LEGO MINDSTORMS EV3 is a toy robot produced by the LEGO Group. It is based +on the davinci da850 evm. The EV3 has a 16MB spi flash and a SDHC microSD card +reader. + +Booting +======= + +The EV3 contains a bootloader in EEPROM that loads u-boot.bin from address 0x0 +of the spi flash memory. Using the default configuration, u-boot will check to +see if there is a boot.scr file on the first FAT partition of the mmc. If there +is, it will run the script and boot the kernel from the uImage file also in +the FAT partition. Otherwise, it will load a kernel and rootfs from the flash. +The kernel must be stored at address 0x50000 on the flash and have a maximum +size of 3MiB. The rootfs must be a squasfs image and stored at 0x350000 in the +flash and have a maximum size of 9.3MiB. The flash starting at 0xCB0000 is +reserved for user data. + +Writing image to flash +====================== + +The EEPROM contains a program for uploading an image file to the flash memory. +The program is started by holding down the right button on the EV3 when powering +it on. You can also `run fwupdateboot` in the u-boot shell to reboot into this +mode. The image can then be uploaded using the official LEGO MINDSTORMS EV3 +software or a 3rd party program capable of uploading a firmware file. + +If you are booting from the microSD card, it is enough to just write uboot.bin +to the flash. If you are not using a microSD card, you will need to create an +image file using the layout described above.
board/lego/ev3/legoev3.c new file +176 -0
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configs/legoev3_defconfig new file +12 -0
@@ -0,0 +1,12 @@ +CONFIG_ARM=y +CONFIG_ARCH_DAVINCI=y +CONFIG_TARGET_LEGOEV3=y +CONFIG_AUTOBOOT_KEYED=y +CONFIG_AUTOBOOT_PROMPT="Autoboot in %d seconds - press 'l' to stop...\n" +CONFIG_AUTOBOOT_STOP_STR="l" +# CONFIG_CMD_IMLS is not set +# CONFIG_CMD_FLASH is not set +# CONFIG_CMD_SETEXPR is not set +CONFIG_SPI_FLASH=y +CONFIG_SPI_FLASH_STMICRO=y +CONFIG_SYS_NS16550=y
include/configs/legoev3.h new file +255 -0
255 lines not on this page · raw message
Signature · 1 line
1.9.1
PATCH 1/1 arm: Add support for LEGO MINDSTORMS EV3
Quoted 8 lines · David Lechner
This is based on the davinci da850evm. It can boot from either the on-board 16MB flash or from a microSD card. It also reads board information from an I2C EEPROM.
The EV3 itself initally boots from write-protected EEPROM, so no u-boot SPL is needed.
Signed-off-by David Lechner <[email protected]>
Reviewed-by Tom Rini <[email protected]>
Signature · 8 lines
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Quoted 9 lines · David Lechner
This is based on the davinci da850evm. It can boot from either the on-board 16MB flash or from a microSD card. It also reads board information from an I2C EEPROM.
The EV3 itself initally boots from write-protected EEPROM, so no u-boot SPL is needed.
Signed-off-by David Lechner <[email protected]>Reviewed-by Tom Rini <[email protected]>
Applied to u-boot/master, thanks!
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