MTK Read/Write Ethernet Mac Addrees from Kernel NvRAM Patch

在Kernel Ethernet Driver中读nvram , 更新以太网Mac 地址。

add Read and Write Ethernet Mac Addrees from NVRAMSigned-off-by: Leon <shh@xxxx.com>diff --git a/kernel-3.18/drivers/net/usb/r8152.c b/kernel-3.18/drivers/net/usb/r8152.c
old mode 100644
new mode 100755
index c6554c7..a09a570
--- a/kernel-3.18/drivers/net/usb/r8152.c
+++ b/kernel-3.18/drivers/net/usb/r8152.c
@@ -993,12 +993,93 @@ out1:return ret;}+#define IS_SUPPORT_NVRAM  1
+#if IS_SUPPORT_NVRAM
+#define ETHERNET_NVRAM_CUSTOM_NAME "/vendor/nvdata/APCFG/APRDEB/ETHERNET"
+unsigned char g_nvram_macaddr[6];
+
+static int nvram_read(char *filename, char *buf, ssize_t len, int offset)
+{
+    struct file *fd;
+    //ssize_t ret;
+    int retLen = -1;
+
+    mm_segment_t old_fs = get_fs();
+    set_fs(KERNEL_DS);
+
+    fd = filp_open(filename, O_WRONLY|O_CREAT, 0644);
+
+    if(IS_ERR(fd)) {
+        printk("Leon [nvram_read] failed to open!!\n");
+        return -1;
+    }
+    do{
+        if ((fd->f_op == NULL) || (fd->f_op->read == NULL))
+            {
+                               printk("Leon [nvram_read] file can not be read!!\n");
+                               break;
+            }
+
+        if (fd->f_pos != offset) {
+            if (fd->f_op->llseek) {
+                    if(fd->f_op->llseek(fd, offset, 0) != offset) {
+                        printk("[nvram_read] : failed to seek!!\n");
+                        break;
+                    }
+              } else {
+                    fd->f_pos = offset;
+              }
+        }
+
+        retLen = fd->f_op->read(fd,buf,len,&fd->f_pos);
+
+    }while(false);
+
+    filp_close(fd, NULL);
+
+    set_fs(old_fs);
+
+    return retLen;
+}
+
+static int nvram_write(char *filename, unsigned char *buf, int count)
+{
+               struct file *fd;
+        const char __user *p = (__force const char __user *)buf;
+        int result;
+        mm_segment_t oldfs;
+               fd = filp_open(filename, O_WRONLY|O_CREAT, 0644);
+
+               if(IS_ERR(fd)) {
+                       printk("Leon [nvram_write] failed to open!!\n");
+                       return -1;
+               }
+
+        oldfs = get_fs();
+        set_fs(KERNEL_DS);
+        fd->f_pos = 0;
+        result = fd->f_op->write(fd, p, count, &fd->f_pos);
+        set_fs(oldfs);
+        return result;
+}
+
+
+int load_nvram_macaddr( char * filename, char * buf, int len)
+{
+    return nvram_read( filename, buf, len, sizeof(u16) + sizeof(u16));
+}
+
+
+#endifstatic int set_ethernet_addr(struct r8152 *tp){struct net_device *dev = tp->netdev;struct sockaddr sa;int ret;
-
+#if IS_SUPPORT_NVRAM
+       int i = 0;
+       printk("nvram rtl8152---set_ethernet_addr---\n");
+#endifif (tp->version == RTL_VER_01)ret = pla_ocp_read(tp, PLA_IDR, 8, sa.sa_data);else
@@ -1009,8 +1090,60 @@ static int set_ethernet_addr(struct r8152 *tp)} else if (!is_valid_ether_addr(sa.sa_data)) {netif_err(tp, probe, dev, "Invalid ether addr %pM\n",sa.sa_data);
+#if IS_SUPPORT_NVRAM
+               g_nvram_macaddr[0] = 0;
+               g_nvram_macaddr[1] = 0;
+               g_nvram_macaddr[2] = 0;
+               g_nvram_macaddr[3] = 0;
+               g_nvram_macaddr[4] = 0;
+               g_nvram_macaddr[5] = 0;
+               load_nvram_macaddr(ETHERNET_NVRAM_CUSTOM_NAME,(char *)&g_nvram_macaddr, sizeof(g_nvram_macaddr));
+               printk("Leon Read nvram >: g_nvram_macaddr %02x%02x%02x%02x%02x%02x\n",
+            g_nvram_macaddr[0], g_nvram_macaddr[1], g_nvram_macaddr[2],
+            g_nvram_macaddr[3], g_nvram_macaddr[4], g_nvram_macaddr[5]);
+
+
+               //1.读eth nvram里面mac , 就判断0下标,无就随机生成一组
+               if(g_nvram_macaddr[0] == 0){
+                       //2.随机生成函数
+                       eth_hw_addr_random(dev);
+                       //3.写到sa.sa_data,长度6
+                       ether_addr_copy(sa.sa_data, dev->dev_addr);
+                       //4.准备数据,写到nvram里面
+                       g_nvram_macaddr[0] = 0;//sa.sa_data[0];
+                       g_nvram_macaddr[1] = 0;//sa.sa_data[1];
+                       g_nvram_macaddr[2] = 0;//sa.sa_data[2];
+                       g_nvram_macaddr[3] = 0;//sa.sa_data[3];
+                       g_nvram_macaddr[4] = sa.sa_data[0];
+                       g_nvram_macaddr[5] = sa.sa_data[1];
+                       g_nvram_macaddr[6] = sa.sa_data[2];
+                       g_nvram_macaddr[7] = sa.sa_data[3];
+                       g_nvram_macaddr[8] = sa.sa_data[4];
+                       g_nvram_macaddr[9] = sa.sa_data[5];
+                       /*
+                       上层读是下标从4开始才算以太网address
+                       for(i = 0; i < 6; i++){
+                               sa.sa_data[i] = g_nvram_macaddr[i];
+                       }
+                       nvram_write(ETHERNET_NVRAM_CUSTOM_NAME,(char *)&sa.sa_data, sizeof(sa.sa_data)*2);
+                       */
+                       //5.写到nvram
+                       nvram_write(ETHERNET_NVRAM_CUSTOM_NAME,(char *)&g_nvram_macaddr, sizeof(g_nvram_macaddr)*2);
+                       //6.打印随机生成的eth mac
+                       printk("Leon eth_hw_addr_random > %02x%02x%02x%02x%02x%02x\n",sa.sa_data[0], sa.sa_data[1], sa.sa_data[2]
+               }else{
+                       //nvram里面有数据,赋值到sa.sa_data
+                       for(i = 0; i < 6; i++){
+                               sa.sa_data[i] = g_nvram_macaddr[i];
+                       }
+                       //打印从nvram里面写的mac address
+                       printk("Leon read nvram to sa.sa_data >  %02x%02x%02x%02x%02x%02x\n",g_nvram_macaddr[0], g_nvram_macaddr[
+               }
+
+#elseeth_hw_addr_random(dev);ether_addr_copy(sa.sa_data, dev->dev_addr);
+#endifret = rtl8152_set_mac_address(dev, &sa);netif_info(tp, probe, dev, "Random ether addr %pM\n",sa.sa_data);
@@ -1024,6 +1157,8 @@ static int set_ethernet_addr(struct r8152 *tp)return ret;}+

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MTK Read/Write Ethernet Mac Addrees from Kernel NvRAM Patch

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