real6410移植记录一
加入技术交流群
开发板为华天正的real6410，选定的内核版本为linux-2.6.37，交叉工具链为开发板自带的。
本文引用地址：https://www.eepw.com.cn/article/201611/317277.htm1、修改Makefile
首先修改Makefile，对交叉工具和目标架构进行设置。具体如下：
-ARCH ?= $(SUBARCH)
-CROSS_COMPILE ?= $(CONFIG_CROSS_COMPILE:"%"=%)
+ARCH ?= arm
+CROSS_COMPILE ?= arm-none-linux-gnueabi-
2、修改机器码
可以修改u-boot，也可以修改kernel，只要两者匹配即可。建议修改kernel的，因为内核的修改比较容易一些。
在u-boot/include/configs/smdk6410.h文件中：
#define MACH_TYPE 1626
在linux-2.6.37/arch/arm/tools/mach-types中修改如下：
-real6410 MACH_REAL6410 REAL6410 2990
+real6410 MACH_REAL6410 REAL6410 1626
3、进行NFS相关配置，并从NFS启动系统
设置启动方式：
setenv bootargs noinitrd root=/dev/nfs console=ttySAC0 nfsroot=192.168.1.10:/home/fantity/work/real6410/target/real6410_fs ip=192.168.1.20:192.168.1.10:192.168.1.1:255.255.255.0::eth0:on fbcon=rotate:1 init=/linuxrc
移植过程中需要配置NFS和相关的网络驱动，否则出现如下错误：
VFS: Cannot open root device "nfs" or unknown-block(0,255)
Please append a correct "root=" boot option; here are the available partitions:
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,255)
[
[
[
[
[
相关的配置如下图所示，注意，NFS的配置选项必须在TCP/IP选择之后才可以看到。
[*] Networking support --->
Networking options --->
[*] TCP/IP networking
[*] IP: kernel level autoconfiguration
[*] IP: BOOTP support
Device Drivers --->
[*] Network device support --->
<*> PHY Device support and infrastructure --->
[*] Ethernet (10 or 100Mbit) --->
<*> DM9000 support
File systems --->
[*] Network File Systems --->
<*> NFS client support
[*] NFS client support for NFS version 3
[ ] NFS client support for the NFSv3 ACL protocol extension
[*] NFS client support for NFS version 4
[ ] NFS client support for NFSv4.1
[*] Root file system on NFS
4、Nand Flash配置
对arch/arm/mach-s3c64xx/mach-real6410.c作出如下修改：
static struct mtd_partition real6410_nand_part[] = {
[0] = {
- .name = "uboot",
- .size = SZ_1M,
- .offset = 0,
+ .name = "uboot",
+ .offset = 0,
+ .size = (256*SZ_1K),
+ .mask_flags = MTD_CAP_NANDFLASH,
},
[1] = {
- .name = "kernel",
- .size = SZ_2M,
- .offset = SZ_1M,
+ .name = "Kernel",
+ .offset = (256*SZ_1K),
+ .size = (4*SZ_1M) - (256*SZ_1K),
+ .mask_flags = MTD_CAP_NANDFLASH,
},
[2] = {
- .name = "rootfs",
- .size = MTDPART_SIZ_FULL,
- .offset = SZ_1M + SZ_2M,
+ .name = "cramfs",
+ .offset = (4*SZ_1M),
+ .size = (4*SZ_1M),
+ },
+ [3] = {
+ .name = "ubifs",
+ .offset = MTDPART_OFS_APPEND,
+ .size = MTDPART_SIZ_FULL,
},
};
将驱动s3c_nand.c、regs-nand.h文件拷贝到相应的目录drivers/mtd/nand/s3c_nand.c和arch/arm/plat-samsung/include/plat/regs-nand.h下。
同时修改文件drivers/mtd/nand/Kconfig
+config MTD_NAND_S3C
+ state "NAND Flash support for Samsung S3C SoCs"
+ depends on ARCH_S3C2410 || ARCH_S3C64XX
+ help
+ This enables the NAND flash controller on the S3C SoCs
+
+ No board specific support is done by this driver, each board
+ must advertise a platform_device for the driver to attach.
+
+config MTD_NAND_S3C_DEBUG
+ bool "Samsung S3C NAND driver debug"
+ depends on MTD_NAND_S3C
+ help
+ Enable debugging of the S3C NAND driver
+
+config MTD_NAND_S3C_HWECC
+ bool "Samsung S3C NAND Hardware ECC"
+ depends on MTD_NAND_S3C
+ help
+ Enable the use of the controllers internal ECC generator when
+ using NAND. Early versions of the chips have had problems with
+ incorrect ECC generation, and if using these, the default of
+ software ECC is preferable.
修改文件drivers/mtd/nand/Makefile
obj-$(CONFIG_MTD_NAND_S3C2410) += s3c2410.o
+obj-$(CONFIG_MTD_NAND_S3C) += s3c_nand.o
需要选择如下驱动配置：
Device Drivers --->
<*> Memory Technology Device (MTD) support --->
<*> NAND Device Support --->
<> NAND Flash support for Samsung S3C SoCs //不选
<*> NAND Flash support for S3C SoC
[*] S3C NAND Hardware ECC
[ ] S3C NAND driver debug
编译内核，出现如下错误：
drivers/built-in.o: In function `s3c_nand_probe:
/home/weimen/Work/realarm/lsp/kernel/real6410_linux-2.6.37/drivers/mtd/nand/s3c_nand.c:1192: undefined reference to `add_mtd_partitions
修改内核配置，make menuconfig，添加分区支持配置。
Device Drivers --->
<*> Memory Technology Device (MTD) support --->
[*] MTD partitioning support
系统启动，出现如下信息时，说明nand driver移植正常。
S3C NAND Driver, (c) 2008 Samsung Electronics
S3C NAND Driver is using hardware ECC.
NAND device: Manufacturer ID: 0xec, Chip ID: 0xd3 (Samsung )
Creating 4 MTD partitions on "NAND 1GiB 3,3V 8-bit":
0x000000000000-0x000000040000 : "uboot"
0x000000040000-0x000000400000 : "Kernel"
0x000000400000-0x000000800000 : "cramfs"
0x000000800000-0x000040000000 : "ubifs"
根文件系统启动到最后，出现如下错误。
VFS: Unable to mount root fs via NFS, trying floppy.
VFS: Cannot open root device "mtdblock2" or unknown-block(2,0)
Please append a correct "root=" boot option; here are the available partitions:
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(2,0)
[
[
[
[
[
[
上面的问题在于没有配置好mtd的驱动，对驱动进行如下配置，下面分别表示可以将MTD设备当作字符设备和块设备进行操作。选择之后通过NFS挂载，在/dev/目录下出现mtdblock1、mtdblock2、mtdblock3、mtdblock4设备节点。
<*> Memory Technology Device (MTD) support --->
<*> Direct char device access to MTD devices
<*> Caching block device access to MTD devices
上面的配置完成后，出现如下错误：
end_request: I/O error, dev mtdblock2, sector 0
Buffer I/O error on device mtdblock2, logical block 0
s3c6400_setup_sdhci_cfg_card: CTRL 2=c0004100, 3=80808080
end_request: I/O error, dev mtdblock2, sector 0
Buffer I/O error on device mtdblock2, logical block 0
end_request: I/O error, dev mtdblock2, sector 8
Buffer I/O error on device mtdblock2, logical block 1
mmc0: mmc_rescan: trying to init card at 200000 Hz
end_request: I/O error, dev mtdblock2, sector 8
Buffer I/O error on device mtdblock2, logical block 1
end_request: I/O error, dev mtdblock2, sector 24
Buffer I/O error on device mtdblock2, logical block 3
s3c6400_setup_sdhci_cfg_card: CTRL 2=c0004100, 3=80808080
end_request: I/O error, dev mtdblock2, sector 24
Buffer I/O error on device mtdblock2, logical block 3
List of all partitions:
1f00 256 mtdblock0 (driver?)
1f01 3840 mtdblock1 (driver?)
1f02 4096 mtdblock2 (driver?)
1f03 1040384 mtdblock3 (driver?)
No filesystem could mount root, tried: cramfs
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(31,2)
[
[
[
[
[
[
在网上查了下，说是要关闭Hard ECC，关闭之后又出现如下错误，可能是cramfs的问题，需要重新制作，这个问题后面再解决了。
List of all partitions:
1f00 256 mtdblock0 (driver?)
1f01 3840 mtdblock1 (driver?)
1f02 4096 mtdblock2 (driver?)
1f03 1040384 mtdblock3 (driver?)
No filesystem could mount root, tried: cramfs
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(31,2)
[
[
[
[
[
[
5、制作ubifs文件系统
先使用NFS挂载文件系统，使用如下配置：
setenv bootargs noinitrd root=/dev/nfs console=ttySAC0 nfsroot=192.168.1.115:/home/xx/Work/realarm/target/rootfs_cramfs ip=192.168.1.20:192.168.1.10:192.168.1.1:255.255.255.0::eth0:on fbcon=rotate:1 init=/linuxrc
使用ubifs文件系统，其中mtd3分区即为ubifs分区。使用如下命令将文件系统烧录进nand中。（注意需要关闭硬件ECC校验，否则/sbin/ubiattach /dev/ubi_ctrl -m 3会出错）。
且读取启动开发板时会出现如下错误：
UBI error: ubi_io_read: error -74 (ECC error) while reading 2048 bytes from PEB 547:2048, read 2048 bytes
UBI error: ubi_io_read: error -74 (ECC error) while reading 64 bytes from PEB 548:0, read 64 bytes
使用命令/sbin/ubiattach /dev/ubi_ctrl -m 3，当出现如下错误时，说明ubifs文件系统未配置好。
ubiattach: error!: UBI is not present in the system
再次执行make menuconfig配置好ubifs文件系统
File systems --->
[*] Miscellaneous filesystems --->
<*> UBIFS file system support
新建一个文件夹rootfs_qtopia，将开发板所提供的源码包qtopia.tar.gz解压进去。同时解压源码包qtopia-2.2.0-Real6410.tar.bz2，并对其进行编译，执行./build命令。安装结果就在qtopia-2.2.0-Real6410/qtopia/image/opt目录。使用编译出来的qtopia-2.2.0-Real6410/qtopia/image/opt替换rootfs_qtopia/opt。打包成Qt文件系统
cd rootfs_qtopia/
$ /sbin/flash_eraseall /dev/mtd3
$ /sbin/ubiattach /dev/ubi_ctrl -m 3
$ /sbin/ubimkvol /dev/ubi0 -N rootfs -m
$ mount -t ubifs ubi0_0 /mnt/nfs
$ tar xvf /qtopia-2.2.0-Real6410.tar.bz2 -C /mnt/nfs/
$ sync
修改启动命令为：
setenv bootargs noinitrd mem=224M console=ttySAC0 init=/linuxrc ubi.mtd=3 root=ubi0:rootfs rootfstype=ubifs
如下是启动信息：
UBIFS: recovery completed
UBIFS: mounted UBI device 0, volume 0, name "rootfs"
UBIFS: file system size: 1034514432 bytes (1010268 KiB, 986 MiB, 4009 LEBs)
UBIFS: journal size: 33546240 bytes (32760 KiB, 31 MiB, 130 LEBs)
UBIFS: media format: w4/r0 (latest is w4/r0)
UBIFS: default compressor: lzo
UBIFS: reserved for root: 4952683 bytes (4836 KiB)
VFS: Mounted root (ubifs filesystem) on device 0:10.
Freeing init memory: 128K
hwclock: cant open /dev/misc/rtc: No such file or directory
amixer: Control default open error: No such file or directory
amixer: Control default open error: No such file or directory
/usr/sbin/alsactl: load_state:1236: No soundcards found...
Try to bring eth0 interface up....../etc/init.d/ifconfig-eth0: line 6: //ifconfig: not found
eth0: link up, 100Mbps, full-duplex, lpa 0x4DE1
Done
Now,starting the qtopia-2.2.0....
unifi_sdio: version magic 2.6.28.6 preempt mod_unload ARMv6 should be 2.6.37-gfb40001 preempt mod_unload ARMv6
insmod: cannot insert /lib/modules/2.6.28.6/unifi_sdio.ko: invalid module format
Please press Enter to activate this console. Cannot open touchscreen /dev/input/event1 (No such file or directory)
Mouse type intelliMouse:/dev/input/mice unsupported
Warning: could not register server
[root@Real6410 /]# pwd
/
评论