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开发环境：win7 64位 + VMware12 + Ubuntu14.04 64位
工具链：linaro提供的gcc-linaro-6.1.1-2016.08-x86_64_arm-linux-gnueabi
要移植的u-boot版本：u-boot-2016-11
Git仓库地址：https://github.com/X-Project-FriendlyARMTiny4412/u-boot
Tiny4412开发板硬件版本为：
底板： Tiny4412/Super4412SDK 1506
核心板：Tiny4412 - 1412
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在上一节中我们已经完成了把u-boot.bin从SD卡上拷贝到DDR内存，并跳转到DDR内存中去执行u-boot的工作。这节仅先记录下如何把SDCard用起来，并且把Kernelboot起来的一些具体的操作，详细分析后面再写。
1、Tiny4412 SDCard用起来
代码修改如下：
| diff --git a/arch/arm/dts/exynos4412-tiny4412.dts b/arch/arm/dts/exynos4412-tiny4412.dts index a467250..3010f50 100644 --- a/arch/arm/dts/exynos4412-tiny4412.dts +++ b/arch/arm/dts/exynos4412-tiny4412.dts @@ -1,29 +1,135 @@ /* - * FriendlyARM Tiny4412 board device tree source - * + * FriendlyARM's Exynos4412 based TINY4412 board device tree source * 2016 * Author AP0904225 <ap0904225@qq.com> * - * SPDX-License-Identifier: GPL-2.0+ - */ + * Device tree source file for FriendlyARM's TINY4412 board which is based on + * Samsung's Exynos4412 SoC. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * SPDX-License-Identifier: GPL-2.0+ + * +*/
/dts-v1/; #include "exynos4412.dtsi"
/ { - model = "Tiny4412 based on Exynos4412"; - compatible = "samsung,tiny4412", "samsung,exynos4412"; - - chosen { - stdout-path = "serial0"; - }; + model = "FriendlyARM TINY4412 board based on Exynos4412"; + compatible = "friendlyarm,tiny4412", "samsung,exynos4412", "samsung,exynos4";
aliases { serial0 = "/serial@13800000"; console = "/serial@13800000"; + mmc2 = "/sdhci@12530000"; + mmc4 = "/dwmmc@12550000"; };
- serial0:serial@13810000 { + memory { + reg = <0x40000000 0x40000000>; + }; + + serial0:serial@13800000 { status = "okay"; }; + + serial1:serial@13810000 { + status = "disabled"; + }; + + serial2:serial@13820000 { + status = "disabled"; + }; + + serial3:serial@13830000 { + status = "disabled"; + }; + + serial4:serial@13840000 { + status = "disabled"; + }; + + i2c@13860000 { + status = "disabled"; + }; + + i2c@13870000 { + status = "disabled"; + }; + + i2c@13880000 { + status = "disabled"; + }; + + i2c@13890000 { + status = "disabled"; + }; + + i2c@138a0000 { + status = "disabled"; + }; + + i2c@138b0000 { + status = "disabled"; + }; + + i2c@138c0000 { + status = "disabled"; + }; + + i2c@138d0000 { + status = "disabled"; + }; + + sdhci@12510000 { + compatible = "samsung,exynos4412-sdhci"; + status = "disabled"; + }; + + sdhci@12520000 { + compatible = "samsung,exynos4412-sdhci"; + status = "disabled"; + }; + + sdhci@12530000 { + compatible = "samsung,exynos4412-sdhci"; + samsung,bus-width = <4>; + samsung,timing = <1 2 3>; + cd-gpios = <&gpk2 2 0>; + }; + + sdhci@12540000 { + compatible = "samsung,exynos4412-sdhci"; + status = "disabled"; + }; + + dwmmc@12550000 { + samsung,bus-width = <8>; + samsung,timing = <2 1 0>; + samsung,removable = <0>; + fifoth_val = <0x203f0040>; + bus_hz = <400000000>; + div = <0x3>; + index = <4>; + }; + + ehci@12580000 { + compatible = "samsung,exynos-ehci"; + reg = <0x12580000 0x100>; + #address-cells = <1>; + #size-cells = <1>; + phy { + compatible = "samsung,exynos-usb-phy"; + reg = <0x125B0000 0x100>; + }; + }; + + emmc-reset { + compatible = "samsung,emmc-reset"; + reset-gpio = <&gpk1 2 0>; + }; + }; diff --git a/configs/tiny4412_defconfig b/configs/tiny4412_defconfig index 19d0dda..62ed0d2 100644 --- a/configs/tiny4412_defconfig +++ b/configs/tiny4412_defconfig @@ -1,6 +1,3 @@ -# -# U-Boot 2016.11 Configuration for FriendlyARM tiny4412 -# CONFIG_ARM=y CONFIG_ARCH_EXYNOS=y CONFIG_ARCH_EXYNOS4=y @@ -11,34 +8,43 @@ CONFIG_SYS_CONSOLE_IS_IN_ENV=y CONFIG_SYS_CONSOLE_INFO_QUIET=y CONFIG_SPL=y CONFIG_HUSH_PARSER=y -CONFIG_SYS_PROMPT="TINY4412 # " +CONFIG_SYS_PROMPT="Tiny4412 # " CONFIG_CMD_BOOTZ=y +# CONFIG_CMD_IMLS is not set +# CONFIG_CMD_XIMG is not set +CONFIG_DM_MMC=y CONFIG_CMD_MMC=y +CONFIG_CMD_DFU=y +CONFIG_CMD_USB_MASS_STORAGE=y +# CONFIG_CMD_FPGA is not set +# CONFIG_CMD_NET is not set +CONFIG_CMD_DHCP=y +# CONFIG_CMD_NFS is not set CONFIG_CMD_MII=y CONFIG_CMD_CACHE=y +# CONFIG_CMD_MISC is not set CONFIG_CMD_EXT2=y CONFIG_CMD_EXT4=y CONFIG_CMD_EXT4_WRITE=y CONFIG_CMD_FAT=y CONFIG_CMD_FS_GENERIC=y CONFIG_OF_CONTROL=y +CONFIG_DFU_MMC=y +CONFIG_USB=y +CONFIG_DM_USB=y +CONFIG_USB_GADGET=y +CONFIG_USB_GADGET_DWC2_OTG=y +CONFIG_USB_GADGET_DOWNLOAD=y +CONFIG_G_DNL_MANUFACTURER="Samsung" +CONFIG_G_DNL_VENDOR_NUM=0x04e8 +CONFIG_G_DNL_PRODUCT_NUM=0x6601
# #DEBUG UART # -CONFIG_DEBUG_UART=y -CONFIG_SPL_SERIAL_SUPPORT=y -CONFIG_SPL_GPIO_SUPPORT=y -CONFIG_DEBUG_UART_S5P=y -CONFIG_DEBUG_UART_BASE=0x13800000 -CONFIG_DEBUG_UART_CLOCK=100000000 - -# -#NOTE:do not delete this: -# -# CONFIG_CMD_IMLS is not set -# CONFIG_CMD_XIMG is not set -# CONFIG_CMD_MISC is not set -# CONFIG_CMD_FPGA is not set -# CONFIG_CMD_NET is not set -# CONFIG_CMD_NFS is not set +#CONFIG_DEBUG_UART=y +#CONFIG_SPL_SERIAL_SUPPORT=y +#CONFIG_SPL_GPIO_SUPPORT=y +#CONFIG_DEBUG_UART_S5P=y +#CONFIG_DEBUG_UART_BASE=0x13800000 +#CONFIG_DEBUG_UART_CLOCK=100000000 diff --git a/include/configs/tiny4412.h b/include/configs/tiny4412.h index 3a02f9e..4197e16 100644 --- a/include/configs/tiny4412.h +++ b/include/configs/tiny4412.h @@ -1,5 +1,5 @@ /* - * 2016 + * 2017 * Author AP0904225 <ap0904225@qq.com> * * Configuration settings for the FriendlyARM TINY4412 (EXYNOS4412) board. @@ -15,10 +15,6 @@
#include <configs/exynos4-common.h>
-/* TIZEN THOR downloader support */ -#undef CONFIG_CMD_THOR_DOWNLOAD -#undef CONFIG_USB_FUNCTION_THOR - /* High Level Configuration Options */ #define TINY4412 1 /* working with TINY4412*/
@@ -36,15 +32,15 @@ #define CONFIG_SYS_LOAD_ADDR (CONFIG_SYS_SDRAM_BASE + 0x3E00000)
#define CONFIG_SYS_TEXT_BASE 0x43E00000 +#define CONFIG_SYS_INIT_SP_ADDR (CONFIG_SYS_TEXT_BASE - 0x1000000)
#define CONFIG_MACH_TYPE MACH_TYPE_TINY4412
/* select serial console configuration */ -#define CONFIG_SERIAL2 #define CONFIG_BAUDRATE 115200
/* Console configuration */ -#define CONFIG_DEFAULT_CONSOLE "console=ttySAC1,115200n8 " +#define CONFIG_DEFAULT_CONSOLE "console=ttySAC0,115200n8 "
#define CONFIG_SYS_MEM_TOP_HIDE (1 << 20) /* ram console */
@@ -93,10 +89,10 @@ "fi;" "load mmc ${mmcdev} ${loadaddr} uImage; bootm ${loadaddr} "
-#define CONFIG_CLK_1000_400_200 +/* //#define CONFIG_CLK_1000_400_200 */
/* MIU (Memory Interleaving Unit) */ -#define CONFIG_MIU_2BIT_21_7_INTERLEAVED +/* //#define CONFIG_MIU_2BIT_21_7_INTERLEAVED */
#define CONFIG_ENV_IS_IN_MMC #define CONFIG_SYS_MMC_ENV_DEV 0 @@ -109,13 +105,10 @@ #define CONFIG_SPL_LDSCRIPT "board/samsung/common/exynos-uboot-spl.lds" #define CONFIG_SPL_MAX_FOOTPRINT (14 * 1024)
-#define CONFIG_SYS_INIT_SP_ADDR 0x02040000 - -/* U-Boot copy size from SD/MMC to DRAM.*/ +/* U-Boot copy size from boot Media to DRAM.*/ #define COPY_BL2_SIZE 0x80000 #define BL2_START_OFFSET ((CONFIG_ENV_OFFSET + CONFIG_ENV_SIZE)/512) #define BL2_SIZE_BLOC_COUNT (COPY_BL2_SIZE/512) /* u-boot size is 512K */ - /* * SD/MMC(1 Block = 512B) layout: * +------------+-------------------------------------------------------------------------------------------------+ @@ -130,5 +123,4 @@ */
- #endif /* __CONFIG_H */
|
2、Kernel boot起来
2.1 先把u-boot烧进SD卡，并把uImage、ramdisk.img和exynos4412-tiny4412.dtb拷贝进SD卡,这三个文件的下载地址为：http://files.cnblogs.com/files/AP0904225/tiny4412-test-image.tar.gz
tiny4412开发板从SD卡启动后，使其进入u-boot命令行状态，如下图所示：
2.2 输入mmcinfo命令查看下SD/MMC设备信息：
2.3 设置bootcmd参数
设置bootcmd变量为 "load mmc 0 0x40007000 uImage; load mmc 0 0x48000000 ramdisk.img; load mmc 0 0x42000000 exynos4412-tiny4412.dtb; bootm 0x40007000 0x48000000 0x42000000"；并保存。
load mmc 0 0x40007000 uImage 是把SD卡上的uImage文件读到内存地址为0x40007000处；
load mmc 0 0x48000000 ramdisk.img 是把SD卡上的ramdisk.img文件读到内存地址为0x48000000处；
load mmc 0 0x42000000 exynos4412-tiny4412.dtb是把SD卡上的exynos4412-tiny4412.dtb读到内存地址为0x42000000处；
bootm 0x40007000 0x48000000 0x42000000是告诉u-boot从0x40007000处启动内核，并告诉内核ramdisk.img和设备树文件（*.dtb）的地址为0x48000000、0x42000000
2.4查看下u-boot的环境变量：
然输入boot命令后就把kernel boot起来了
