# Kernel Compile ## 命令 * 单独编译Kernel ```shell ./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 ```bash #/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 ```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; } ``` ```c //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。 ```c //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； ```c //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 ```c //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