BSP源码下载与编译

BSP内核剥离

BSP内核对摄像头驱动支持较好,所以在摄像头应用中有必要使用BSP内核。

官方SDK中camdriod与lichee linux内核绑定,而camdriod比较庞大,所以我们只需抽取lichee linux内核,而抛弃camdriod代码。

单独使用lichee linux的方法是:(构建走读见后一节)

解压 buildroot/dl/gcc-linarno.tar.gzlichee/out/sun8iw8p1/linux/common/buildroot/external-toolchain,并加入环境变量(这步其实在下一步里包含了)

对于Ubuntu20.04,还需要安装32位支持库

sudo apt-get install lib32ncurses5-dev lib32z1

不然会报make: arm-linux-gnueabi-gcc: No such file or directory这样的错误。

在lichee/linux-3.4目录下执行bash ./scripts/build_tiger-cdr.sh

执行过程中会生成内核文件:

Image Name:   Linux-3.4.39
Created:      Tue Sep  5 06:55:03 2017
Image Type:   ARM Linux Kernel Image (uncompressed)
Data Size:    2275400 Bytes = 2222.07 kB = 2.17 MB
Load Address: 40008000
Entry Point:  40008000
  Image arch/arm/boot/uImage is ready
'arch/arm/boot/Image' -> 'output/bImage'
'arch/arm/boot/uImage' -> 'output/uImage'
'arch/arm/boot/zImage' -> 'output/zImage'
Building modules

compile Kernel successful

从主线uboot启动内核,一般使用uImage。

BSP内核配置

BSP内核源码在lichee/linux-3.4下。

通过 make ARCH=arm menuconfig 来配置内核。

我们可以使能摄像头需要修改的一些内核配置:

-> Device Drivers                     
  x       -> Multimedia support (MEDIA_SUPPORT [=y])                                                            
  x         -> Video capture adapters (VIDEO_CAPTURE_DRIVERS [=y])                                     
  x           -> V4L USB devices (V4L_USB_DRIVERS [=y])  
  x              -><M>   USB Video Class (UVC)  CONFIG_USB_VIDEO_CLASS
-> Device Drivers                                                                  
  x       -> Multimedia support (MEDIA_SUPPORT [=y])                                                            
  x         -> Video capture adapters (VIDEO_CAPTURE_DRIVERS [=y])                                    
  x           -> V4L platform devices (V4L_PLATFORM_DRIVERS [=y])                                   
  x             -> SoC camera support (SOC_CAMERA [=y]) 
  x x                          <M>     ov2640 camera support                                                               
  x x                          <M>     ov5647 camera support
  x x                          <M>   sunxi video front end (camera and etc)driver                            
  x x                          <M>     v4l2 driver for SUNXI
   <*>   sunxi video encoder and decoder support

由于camdriod原始的内核配置是为了在spi nor flash上运行而配置的,没有ext4支持,所以需要额外添加ext4支持:

  File systems  --->  
  <*> The Extended 4 (ext4) filesystem
  filesystem              
  x x                          [*]   Use ext4 for ext2/ext3 file systems (NEW)                                         
  x x                          [*]   Ext4 extended attributes (NEW)                                                         
  x x                          [ ]     Ext4 POSIX Access Control Lists (NEW)                                             
  x x                          [ ]     Ext4 Security Labels (NEW)                                                              
  x x                          [ ]   EXT4 debugging support (NEW)                                                         
  x x                          [ ] JBD2 (ext4) debugging support (NEW)

另外还要加上CONFIG_LBDAF(大文件支持,否则无法挂载文件系统)

-> Enable the block layer (BLOCK [=y])  
[*]   Support for large (2TB+) block devices and files

再加上CGROUPS支持:

-> General setup
 [*] Control Group support  --->

如果在文件系统(如debian)中使用了SWAP等特性,则还需要在内核中开启SWAP。

-> General setup
 [*] Support for paging of anonymous memory (swap)

debian下还需要开启 FHANDLE 特性,否则会出现以下错误

-> General setup
 [*] open by fhandle syscalls

如果需要使用wifi功能,则还需要勾选RTL8723BS的支持(注意需要选择模块方式),和AW_RF_PM选项。

-> Device Drivers                                           x   -> Network device support (NETDEVICES [=n])             x       -> Wireless LAN (WLAN [=n])    
x x         <M>   Realtek 8723B SDIO WiFi
-> Networking support  
     -*-   Wireless  --->      
         <*>   cfg80211 - wireless configuration API 
         <*>   Generic IEEE 802.11 Networking Stack (mac80211)
-> Device Drivers                                            x      -> Misc devicess
x x          [*] Allwinner rf module pm drivers

以及下节所说的fex修改。

uboot启动BSP内核

使用主线uboot启动BSP内核,需要修改下启动脚本,放入BSP内核需要的 script.bin 配置文件(相当于主线linux的dtb)

修改boot.cmd:

vim /root/u-boot/boot.cmd

重新生成boot.scr:

cd /root/u-boot/
mkimage -C none -A arm -T script -d boot.cmd boot.scr

复制一份 lichee/tools/pack/chips/sun8iw8p1/configs/tiger-cdr/sys_config.fex

cp /root/lichee/tools/pack/chips/sun8iw8p1/configs/tiger-cdr/sys_config.fex /root/u-boot
vim /root/u-boot/sys_config.fex

首先修改SD卡检测策略,设置为不检测,默认插入

[776]:sdc_detmode=3

使能RTL8723bs无线网卡的话,需要使能mmc1,也设置为不检测sd卡。

[790]:[mmc1_para]
[791]:sdc_used          = 1
[792]:sdc_detmode       = 3

默认mipi摄像头:h22_mipi和dw9714_act,dvp摄像头:ov5640和gc2035

[98]:CIS[0] ... [157]:vip_dev1_af_pwdn =(内容重复)

;--------------------------------------------------------------------------------
;vip (video input port) configuration
;vip_used: 0:disable 1:enable
;vip_mode: 0:sample one interface to one buffer 1:sample two interface to one buffer
;vip_dev_qty: The quantity of devices linked to capture bus
;
;vip_define_sensor_list: If you want use sensor detect function, please set vip_define_sensor_list = 1, and
;                                    verify that file /system/etc/hawkview/sensor_list_cfg.ini is properly configured!
;
;vip_dev(x)_pos: sensor position, "rear" or "front", if vip_define_sensor_list = 1,vip_dev(x)_pos must be configured!
;
;vip_dev(x)_isp_used 0:not use isp 1:use isp
;vip_dev(x)_fmt: 0:yuv 1:bayer raw rgb
;vip_dev(x)_stby_mode: 0:not shut down power at standby 1:shut down power at standby
;vip_dev(x)_vflip: flip in vertical direction 0:disable 1:enable
;vip_dev(x)_hflip: flip in horizontal direction 0:disable 1:enable
;vip_dev(x)_iovdd: camera module io power handle string, pmu power supply
;vip_dev(x)_iovdd_vol: camera module io power voltage, pmu power supply
;vip_dev(x)_avdd: camera module analog power handle string, pmu power supply
;vip_dev(x)_avdd_vol: camera module analog power voltage, pmu power supply
;vip_dev(x)_dvdd: camera module core power handle string, pmu power supply
;vip_dev(x)_dvdd_vol: camera module core power voltage, pmu power supply
;vip_dev(x)_afvdd: camera module vcm power handle string, pmu power supply
;vip_dev(x)_afvdd_vol: camera module vcm power voltage, pmu power supply
;x indicates the index of the devices which are linked to the same capture bus
;fill voltage in uV, e.g. iovdd = 2.8V, vip_devx_iovdd_vol = 2800000
;fill handle string as below:
;axp22_eldo3
;axp22_dldo4
;axp22_eldo2
;fill handle string "" when not using any pmu power supply
;--------------------------------------------------------------------------------

[csi0]
vip_used                 = 1
vip_mode                 = 0
vip_dev_qty              = 1
vip_define_sensor_list   = 0
vip_csi_mck              = port:PE20<3><default><default><default>
vip_csi_sck              = port:PE21<2><default><default><default>
vip_csi_sda              = port:PE22<2><default><default><default>
vip_dev0_mname           = "h22_mipi"
vip_dev0_pos             = "rear"
vip_dev0_lane            = 1
vip_dev0_twi_id          = 0
vip_dev0_twi_addr        = 0x60
vip_dev0_isp_used        = 1
vip_dev0_fmt             = 1
vip_dev0_stby_mode       = 0
vip_dev0_vflip           = 0
vip_dev0_hflip           = 0
vip_dev0_iovdd           = ""
vip_dev0_iovdd_vol       = 3000000
vip_dev0_avdd            = "csi-avdd"
vip_dev0_avdd_vol        = 3000000
vip_dev0_dvdd            = "csi-dvdd"
vip_dev0_dvdd_vol        = 3000000
vip_dev0_afvdd           = ""
vip_dev0_afvdd_vol       = 2800000
vip_dev0_power_en        =
vip_dev0_reset           = port:PG00<1><default><default><default>
vip_dev0_pwdn            = port:PG01<1><default><default><default>
vip_dev0_flash_en        =
vip_dev0_flash_mode      =
vip_dev0_af_pwdn         =
vip_dev0_act_used        = 0
vip_dev0_act_name        = "dw9714_act"
vip_dev0_act_slave       = 0x18
vip_dev1_mname           = ""
vip_dev1_pos                 = "front"
vip_dev1_lane            = 1
vip_dev1_twi_id          = 0
vip_dev1_twi_addr        =
vip_dev1_isp_used        = 0
vip_dev1_fmt             = 1
vip_dev1_stby_mode       = 0
vip_dev1_vflip           = 0
vip_dev1_hflip           = 0
vip_dev1_iovdd           = ""
vip_dev1_iovdd_vol       = 2800000
vip_dev1_avdd            = ""
vip_dev1_avdd_vol        = 2800000
vip_dev1_dvdd            = ""
vip_dev1_dvdd_vol        = 1500000
vip_dev1_afvdd           = ""
vip_dev1_afvdd_vol       = 2800000
vip_dev1_power_en        =
vip_dev1_reset           =
vip_dev1_pwdn            =
vip_dev1_flash_en        =
;fill handle string as below:
;axp22_eldo3
;axp22_dldo4
;axp22_eldo2
;fill handle string "" when not using any pmu power supply
;--------------------------------------------------------------------------------

[csi0]

vip_used                 = 1
vip_mode                 = 0
vip_dev_qty              = 1
vip_define_sensor_list   = 0
vip_csi_mck              = port:PE20<3><default><default><default>
vip_csi_sck              = port:PE21<2><default><default><default>
vip_csi_sda              = port:PE22<2><default><default><default>
vip_dev0_mname           = "h22_mipi"
vip_dev0_pos             = "rear"
vip_dev0_lane            = 1
vip_dev0_twi_id          = 0
vip_dev0_twi_addr        = 0x60
vip_dev0_isp_used        = 1
vip_dev0_fmt             = 1
vip_dev0_stby_mode       = 0
vip_dev0_vflip           = 0
vip_dev0_hflip           = 0
vip_dev0_iovdd           = ""
vip_dev0_iovdd_vol       = 3000000
vip_dev0_avdd            = "csi-avdd"
vip_dev0_avdd_vol        = 3000000
vip_dev0_dvdd            = "csi-dvdd"
vip_dev0_dvdd_vol        = 3000000
vip_dev0_afvdd           = ""
vip_dev0_afvdd_vol       = 2800000
vip_dev0_power_en        =
vip_dev0_reset           = port:PG00<1><default><default><default>
vip_dev0_pwdn            = port:PG01<1><default><default><default>
vip_dev0_flash_en        =
vip_dev0_flash_mode      =
vip_dev0_af_pwdn         =
vip_dev0_act_used        = 0
vip_dev0_act_name        = "dw9714_act"
vip_dev0_act_slave       = 0x18
vip_dev1_mname           = ""
vip_dev1_pos                 = "front"
vip_dev1_lane            = 1
vip_dev1_twi_id          = 0
vip_dev1_twi_addr        =
vip_dev1_isp_used        = 0
vip_dev1_fmt             = 1
vip_dev1_stby_mode       = 0
vip_dev1_vflip           = 0
vip_dev1_hflip           = 0
vip_dev1_iovdd           = ""
vip_dev1_iovdd_vol       = 2800000
vip_dev1_avdd            = ""
vip_dev1_avdd_vol        = 2800000
vip_dev1_dvdd            = ""
vip_dev1_dvdd_vol        = 1500000
vip_dev1_afvdd           = ""
vip_dev1_afvdd_vol       = 2800000
vip_dev1_power_en        =
vip_dev1_reset           =
vip_dev1_pwdn            =
vip_dev1_flash_en        =
vip_dev1_flash_mode      =
vip_dev1_af_pwdn         =

[csi1]
vip_used                 = 0
vip_mode                 = 0
vip_dev_qty              = 1
vip_define_sensor_list   = 0
vip_csi_pck              = port:PE00<2><default><default><default>
vip_csi_mck              = port:PE01<2><default><default><default>
vip_csi_hsync            = port:PE02<2><default><default><default>
vip_csi_vsync            = port:PE03<2><default><default><default>
vip_csi_d0               = port:PE04<2><default><default><default>
vip_csi_d1               = port:PE05<2><default><default><default>
vip_csi_d2               = port:PE06<2><default><default><default>
vip_csi_d3               = port:PE07<2><default><default><default>
vip_csi_d4               = port:PE08<2><default><default><default>
vip_csi_d5               = port:PE09<2><default><default><default>
vip_csi_d6               = port:PE10<2><default><default><default>
vip_csi_d7               = port:PE11<2><default><default><default>
vip_csi_d8               = port:PE12<2><default><default><default>
;vip_csi_d9               = port:PE13<2><default><default><default>
vip_csi_d10               = port:PE14<2><default><default><default>
vip_csi_d11               = port:PE15<2><default><default><default>

vip_csi_sck               = port:PE21<2><default><default><default>
vip_csi_sda               = port:PE22<2><default><default><default>

vip_dev0_mname           = "ov5640"
vip_dev0_pos             = "front"
vip_dev0_twi_id          = 4
vip_dev0_twi_addr        = 0x78
vip_dev0_isp_used        = 0
vip_dev0_fmt             = 0
vip_dev0_stby_mode       = 0
vip_dev0_vflip           = 0
vip_dev0_hflip           = 0
vip_dev0_iovdd           = ""
vip_dev0_iovdd_vol       = 2800000
vip_dev0_avdd            = ""
vip_dev0_avdd_vol        = 2800000
vip_dev0_dvdd            = ""
vip_dev0_dvdd_vol        = 1500000
vip_dev0_afvdd           = ""
vip_dev0_afvdd_vol       = 2800000
vip_dev0_power_en        =
vip_dev0_reset           = port:PE23<1><default><default><default>
vip_dev0_pwdn            = port:PE24<1><default><default><default>
vip_dev0_flash_en        =
vip_dev0_flash_mode      =
vip_dev0_af_pwdn         =

vip_dev0_act_used        = 0
vip_dev0_act_name        = "ad5820_act"
vip_dev0_act_slave       = 0x18

vip_dev1_mname           = "gc2035"
vip_dev1_pos                 = "front"
vip_dev1_lane            = 1
vip_dev1_twi_id          = 4
vip_dev1_twi_addr        = 0x78
vip_dev1_isp_used        = 0
vip_dev1_fmt             = 1
vip_dev1_stby_mode       = 0
vip_dev1_vflip           = 0
vip_dev1_hflip           = 0
vip_dev1_iovdd           = ""
vip_dev1_iovdd_vol       = 2800000
vip_dev1_avdd            = ""
vip_dev1_avdd_vol        = 2800000
vip_dev1_dvdd            = ""
vip_dev1_dvdd_vol        = 1500000
vip_dev1_afvdd           = ""
vip_dev1_afvdd_vol       = 2800000
vip_dev1_power_en        =
vip_dev1_reset           =
vip_dev1_pwdn            =
vip_dev1_flash_en        =
vip_dev1_flash_mode      =
vip_dev1_af_pwdn         =

将其中的摄像头信息改成自己使用的摄像头信息。 保存,并使用 fex2bin sys_config.fex script.bin 生成script.bin文件。

如果提示E: sys_config.fex:165: invalid character at 4.

就注释掉165 166两行。

将script.bin也放入第一分区。

再将前面编译的uImage放入第一分区。

此时就可以使用主线Uboot启动bsp内核了。