【FAQ】全志R329如何在DragonSN烧写mac地址？

budbool LV 8

问题背景

硬件：R528+ Wi-Fi模组（XR829）
软件：Tina3.0及以上
说明：该FAQ旨在介绍DragonSN烧写mac地址的过程。

问题简述

如何从私有分区获取mac地址？

问题分析

从私有分区获取mac地址，需要利用到DragonSN工具烧写mac地址到私有分区，然后借助uboot以comdline的形式传递到内核，内核addr_mgt驱动解析。

这里简要描述一下上述过程：

1.lichee/brandy-2.0/u-boot-2018/board/sunxi/sunxi_bootargs.c

+int update_user_data_ali(void)
+{
+       int data_len;
+       int ret;
+       char output[SST_WIFI_MAC_ADDR_LEN+1];
+       char *sst_info = NULL;
+       int sec_inited      = !sunxi_secure_storage_init();  //分区初始化
+       memset(output, 0, SST_WIFI_MAC_ADDR_LEN+1);  //获取存放mac地址的地址空间并初始化
+       if (sec_inited) {
+               sst_info = (char *)malloc(SST_INFO_KEY_VALUE_ACTUAL_LEN);  //分配存放mac地址的空间并赋值给sst_info结构体
+               if (get_boot_work_mode() != WORK_MODE_BOOT) {
+                       return 0;
+               }
+
+               ret = sunxi_secure_object_read(SST_INFO_KEY_NAME, sst_info, SST_INFO_KEY_VALUE_ACTUAL_LEN, &data_len); //从flash secure storage读出
+               if (ret)
+                       pr_msg("=========%s->%d sunxi_secure_object_read failed==============\n", __func__, __LINE__);
+               memcpy(output, sst_info + SST_WIFI_MAC_ADDR_OFFSET, SST_WIFI_MAC_ADDR_LEN);
+               env_set("wifi_mac", output);
+               pr_msg("=========%s->%d fly  test wifi_mac:%s==============\n", __func__, __LINE__, output);
+       }else{
+               pr_msg("=========%s->%d sunxi_secure_storage_init failed==============\n", __func__, __LINE__);
+       }
+
+       free(sst_info);
+       return 0;
+}

通过sunxi_secure_object_read()接口根据偏移量读取分区中已经烧好的mac地址，赋值给wifi_mac。在通过env_set()接口将获取到的mac地址传递到env。

2.device/config/chips/r818/configs/ailabs_dictpen/linux/env.cfg

27 #set kernel cmdline if boot.img or recovery.img has no cmdline we will use this
28 setargs_nand=setenv bootargs console=${console}...mac_addr=${mac} wifi_mac=${wifi_mac} bt_mac=${bt_mac}
29 setargs_mmc=setenv bootargs console=${console}...mac_addr=${mac} wifi_mac=${wifi_mac} bt_mac=${bt_mac}

内核读取env.cfg时再把wifi_mac取出来，通过addr-mgt驱动获取。

3.lichee/linux-4.9/drivers/misc/sunxi-addr-mgt/sunxi-addr-mgt.c

83 int get_wifi_custom_mac_address(char *addr_str)
 84 {
 85         if (IS_TYPE_INVALID(info.type_cur_wifi) ||
 86                 addr_parse(info.addr_wifi, 1))
 87                 return -1;
 88
 89         strcpy(addr_str, info.addr_wifi);  //直接拷贝info结构体的mac地址属性，最原始的就是uboot阶段的sst_info
 90         return info.type_cur_wifi;
 91 }

4.xr829驱动获取lichee/linux-4.9/drivers/net/wireless/xr829/wlan/main.c

478 extern int get_wifi_custom_mac_address(char *addr_str);
479
480 #define MAC_FROM_CHIPID
481 static void xradio_get_mac_addrs(u8 *macaddr)
482 {
483         int ret = 0;
484         char addr_str[20];
485         SYS_BUG(!macaddr);
486         /* Check mac addrs param, if exsist, use it first.*/
487 #ifdef XRADIO_MACPARAM_HEX
488         memcpy(macaddr, xradio_macaddr_param, ETH_ALEN);
489 #else
490         if (xradio_macaddr_param) {
491                 ret = xradio_macaddr_char2val(macaddr, xradio_macaddr_param);
492         }
493 #endif
494         if (ret < 0 || !MACADDR_VAILID(macaddr)) {
495                 ret = get_wifi_custom_mac_address(addr_str);  //直接调用addr_mgt驱动的接口，即从分区读的方式获取mac地址。
496                 if (ret != -1) {
497                         sscanf(addr_str, "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
498                                                 &macaddr[0], &macaddr[1], &macaddr[2],
499                                                 &macaddr[3], &macaddr[4], &macaddr[5]);
500                 }
501         }
502
503         /* Use random value to set mac addr for the first time,
504          * and save it in  wifi config file. TODO: read from product ID*/
505         if (ret < 0 || !MACADDR_VAILID(macaddr)) {
506 #ifdef XRADIO_MACPARAM_HEX
507                 ret = access_file(WIFI_CONF_PATH, macaddr, ETH_ALEN, 1);  //自定义mac地址写入文件后，从文件获取mac地址
508 #else
509                 char  c_mac[XRADIO_MAC_CHARLEN+2] = {0};
510                 ret = access_file(WIFI_CONF_PATH, c_mac, XRADIO_MAC_CHARLEN, 1);
511                 if (ret >= 0) {
512                         ret = xradio_macaddr_char2val(macaddr, c_mac);
513                 }
514 #endif
515
516                 if (ret < 0 || !MACADDR_VAILID(macaddr)) {
517 #if defined(MAC_FROM_CHIPID)
518                         u32 databuf[4] = {0};
519
520                         sunxi_get_soc_chipid((u8 *)databuf); //获取chipid后定制mac地址的方式
521                         macaddr[0] = (((databuf[1] >> 28) & 0x0f) | ((databuf[2] & 0x0f) << 4)) & 0xff;
522                         macaddr[1] = (databuf[2] >> 4)  & 0xff;
523                         macaddr[2] = (databuf[2] >> 12) & 0xff;
524                         macaddr[3] = (databuf[3] >> 6)  & 0xff;
525                         macaddr[4] = (databuf[3] >> 16) & 0xff;
526                         macaddr[5] = (databuf[3] >> 26) & 0xff;
527 #else
528                         get_random_bytes(macaddr, 6);  //随机生成mac地址的方式
529 #endif
530                         macaddr[0] &= 0xFC;
531 #ifdef XRADIO_MACPARAM_HEX
532                         ret = access_file(WIFI_CONF_PATH, macaddr, ETH_ALEN, 0);
533 #else
534                         ret = xradio_macaddr_val2char(c_mac, macaddr);
535                         ret = access_file(WIFI_CONF_PATH, c_mac, ret, 0);
536 #endif
537                         if (ret < 0)
538                                 xradio_dbg(XRADIO_DBG_ERROR, "Access_file failed, path:%s!\n",
539                                            WIFI_CONF_PATH);
540                         if (!MACADDR_VAILID(macaddr)) {
541                                 xradio_dbg(XRADIO_DBG_WARN, "Use default Mac addr!\n"); //驱动默认可以写死一个mac地址。
542                                 macaddr[0] = 0xDC;
543                                 macaddr[1] = 0x44;
544                                 macaddr[2] = 0x6D;
545                         } else {
546                                 xradio_dbg(XRADIO_DBG_NIY, "Use random Mac addr!\n");
547                         }
548                 } else {
549                         xradio_dbg(XRADIO_DBG_NIY, "Use Mac addr in file!\n");
550                 }
551         }
552         xradio_dbg(XRADIO_DBG_NIY, "MACADDR=%02x:%02x:%02x:%02x:%02x:%02x\n",
553                    macaddr[0], macaddr[1], macaddr[2],
554                    macaddr[3], macaddr[4], macaddr[5]);
555 }

解决方法

1.工作获取

从全志一号通入口获取
https://one.allwinnertech.com/#/devtool?menuID=37
a8203b64ba8e4e7aa280601c97a2e095.jfif