Kernel Compile

命令

• 单独编译Kernel

  ./build.sh -p sun50iw1p1_debian -m kernel -k linux-3.10

• 清除

  ./build.sh -p sun50iw1p1_debian -m distclean -k linux-3.10

• menuconfig

  sudo make ARCH=arm64 CROSS_COMPILE=../out/sun50iw1p1/debian/common/buildroot/external-toolchain/bin/aarch64-linux-gnu- menuconfig

• 拷贝

  scp jay@10.28.3.204:/home/jay/a64/linux-3.10/drivers/net/usb/* ./

• 更新kernel

  #/bin/bash
  
  scp jay@10.28.3.204:/home/jay/a64_v4l2/linux-3.10/output/boot.img ./
  
  [ -f boot.img ] && {
  
          sudo dd if=boot.img of=/dev/mmcblk0p6 bs=1M
          sync
          echo "update kernel succeed" 
          exit 0 
  }
  
  echo "update kernel failed"
  exit 1

驱动

摄像头(ov5640.ko vfl2.ko )

需要修改vfe.c

//linux-3.10/drivers/media/platform/sunxi-vfe/vfe.c
static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)  {
        struct vfe_dev *dev = video_drvdata(file);

        //*i = dev->input;
        *i = 0;
        return 0;
}

//linux-3.10/drivers/media/platform/sunxi-vfe/vfe.c
static int vidioc_enum_input(struct file *file, void *priv, struct v4l2_input *inp) {
         struct vfe_dev *dev = video_drvdata(file);
         if (inp->index > dev->dev_qty-1) {
                 vfe_err("input index(%d) > dev->dev_qty(%d)-1 invalid!\n", inp->index, dev->dev_qty);
                 return -EINVAL;
         }
         vidioc_s_input(file,priv,inp->index);
         if (0 == dev->device_valid_flag[inp->index]) {
                 vfe_err("input index(%d) > dev->dev_qty(%d)-1 invalid!, device_valid_flag[%d] = %d\n",
                         inp->index, dev->dev_qty,inp->index, dev->device_valid_flag[inp->index]);
                 return -EINVAL;
         }
         inp->type = V4L2_INPUT_TYPE_CAMERA;
         return 0;
 }

Device Drivers > Multimedia support > V4L platform devices

GPIO libc（built in）

Device Drivers > GPIO Support

SMT32 I2C& 开机动画（stm_s103.ko）

Device Drivers > Staging drivers > Support for MXJ private driver

USB Net(usbnet.ko asix.ko)

Device Drivers > Network device support > USB Network Adapters

同时直接干掉无线网卡支持。

oui mac 和基于sid md5计算mac地址。

• 接收用户传参，用以用户通过应用空间传递oui mac。

  //inux-3.10/drivers/char/sunxi_sys_info/chipid-sunxi.c        
  static char *user_mac  = "00:00:00:00:00:00";
  static bool  user_flag = true;
  module_param(user_mac,charp,S_IRUSR);

• 如果用户没有传递参数，则通过 sid md5 随机mac；

  //inux-3.10/drivers/char/sunxi_sys_info/chipid-sunxi.c        
  
  #include "linux/cryptohash.h" //for md5
  //generate mac by hash cpuid
  void hash_gen_mac(u8 *mac){
  
  u32 data[16] = {0};
      u32 hash[ 4] = {0};
  
  memset(hash, 0, sizeof(hash));
  memset(data, 0, sizeof(data));
  
      //1. fill chipid to data
      sunxi_get_soc_chipid((u8*)data);
  //memcpy(data, dat, len);
  
      printk(KERN_INFO "hash_gen_mac chipid: %08x %08x %08x %08x", data[0], data[1], data[2], data[3]);
  
      //2. calc md5
  md5_transform(hash, data);
  //hash[0] ^= hash[2];
  //hash[1] ^= hash[3];
      printk(KERN_INFO "hash_gen_mac   hash: %08x %08x %08x %08x", hash[0], hash[1], hash[2], hash[3]);
  
      //3. fill mac
  memset(mac, 0, ETH_ALEN);
  
  mac[0] = 0x06; //((0x1<<2) & 0xfe | 0x02); //clr multicast, set local bit// 0x06:*
  //memcpy(&mac[1], hash, 5); 
  memcpy(&mac[1], hash, ETH_ALEN);
  }

• 业务逻辑

  //inux-3.10/drivers/char/sunxi_sys_info/chipid-sunxi.c        
  user_flag=true;
  printk(KERN_INFO "asix: user mac address is %s",user_mac);
  if(user_mac!=NULL&&strlen(user_mac)==17&&strcmp(user_mac,"00:00:00:00:00:00")!=0) {
      for(i=0;i<6;i++) {
              buf[i]=0;
              if(user_mac[3*i]>='0'&&user_mac[3*i]<='9') {
                      buf[i]|=((user_mac[3*i]-'0')*16);
              }else if(user_mac[3*i]>='a'&&user_mac[3*i]<='f') {
                      buf[i]|=((user_mac[3*i]-'a'+10)*16);
              }else if(user_mac[3*i]>='A'&&user_mac[3*i]<='F') {
                      buf[i]|=((user_mac[3*i]-'A'+10)*16);
              }else {
                      user_flag=false;
                      break;
              }
              if(user_mac[3*i+1]>='0'&&user_mac[3*i+1]<='9') {
                      buf[i]|=(user_mac[3*i+1]-'0');
              }else if(user_mac[3*i+1]>='a'&&user_mac[3*i+1]<='f') {
                      buf[i]|=(user_mac[3*i+1]-'a'+10);
              }else if(user_mac[3*i+1]>='A'&&user_mac[3*i+1]<='F') {
                      buf[i]|=(user_mac[3*i+1]-'A'+10);
              }else {
                      user_flag=false;
                      break;
              }
  
      }
  }else {
      user_flag=false;
  }
  if(user_flag&&((buf[0]&0x0F)%2)==0) {
      printk(KERN_INFO "asix: mac form user setting:%02x:%02x:%02x:%02x:%02x:%02x", buf[0], buf[1], buf[2], buf[3], buf[4], buf[5]);
  }else {
      printk(KERN_INFO "asix: mac form user is null or wrong format. ");
      hash_gen_mac(buf);
      printk(KERN_INFO "asix: mac form chip id hash: %02x:%02x:%02x:%02x:%02x:%02x", buf[0], buf[1], buf[2], buf[3], buf[4], buf[5]);
  }

并且需要使能system info driver。

Device Drivers > Character devices

显示(built-in)

Device Drivers > Graphics support > Support for frame buffer devices > Video support for sunxi

STM32&I2C更新

19:27 2018/7/31

更新为源码自带i2c通用驱动，并且更新速率为100k

Device Drivers > I2C support

fex

• http://linux-sunxi.org/Fex_Guide