openwrt 18.06 ec20 R2.0 qmi 4G拨号上网

记录18.06 下驱动 EC20

openwrt 18.06 已经支持EC20 这个模块的识别了

只要在make menuconfig下选中以下模块, 是直接可以用AT命令读取到信息的,只是无法用qmi 应用程序获取到IP地址

Kernel modules  --->USB Support  --->  -*- kmod-usb-core............................................ Support for USB-*- kmod-usb-net............... Kernel modules for USB-to-Ethernet convertors-*-   kmod-usb-net-qmi-wwan.................................... QMI WWAN drive<*> kmod-usb-ohci............................... Support for OHCI controllers<*>   kmod-usb-serial-option................... Support for Option HSDPA modem

无法获取IP地址主要是qmi 用的RAW-IP mode 没有在

[KERNEL]/drivers/net/usb/qmi_wwan.c

文件里面驱动起来,把下面补丁打入即可

https://download.csdn.net/download/jianzhizuo/10748784

@@ -175,6 +175,21 @@* to 00:a0:c6:00:00:00 despite the host address being different.* This function will also fixup such packets.*/
+struct sk_buff *qmi_wwan_tx_fixup(struct usbnet *dev, struct sk_buff *skb, gfp_t flags)
+{
+  if (dev->udev->descriptor.idVendor != cpu_to_le16(0x2C7C)) return skb;
+
+  // Skip Ethernet header from message
+  if (skb_pull(skb, ETH_HLEN)) {
+      return skb;
+  } else {
+      dev_err(&dev->intf->dev, "Packet Dropped ");
+  }
+  // Filter the packet out, release it
+  dev_kfree_skb_any(skb);
+  return NULL;
+}
+static int qmi_wwan_rx_fixup(struct usbnet *dev, struct sk_buff *skb){struct qmi_wwan_state *info = (void *)&dev->data;
@@ -445,6 +460,20 @@}dev->net->netdev_ops = &qmi_wwan_netdev_ops;dev->net->sysfs_groups[0] = &qmi_wwan_sysfs_attr_group;
+#if 1 //Added by Quectel
+  if (dev->udev->descriptor.idVendor == cpu_to_le16(0x2C7C)) {
+      dev_info(&intf->dev,  "Quectel  EC25&EC21&EC20R2.0&EG91&EG95&EG06&EP06&EM06&BG96 work on RawIP mode\n");
+      dev->net->flags |= IFF_NOARP;
+      usb_control_msg(
+          interface_to_usbdev(intf),
+          usb_sndctrlpipe(interface_to_usbdev(intf), 0),
+          0x22, //USB_CDC_REQ_SET_CONTROL_LINE_STATE
+          0x21, //USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE
+          1, //active CDC DTR
+          intf->cur_altsetting->desc.bInterfaceNumber,
+          NULL, 0, 100);
+  }
+#endif    err:return status;}
@@ -536,6 +565,7 @@.unbind     = qmi_wwan_unbind,.manage_power    = qmi_wwan_manage_power,.rx_fixup       = qmi_wwan_rx_fixup,
+  .tx_fixup       = qmi_wwan_tx_fixup,   };static const struct driver_info   qmi_wwan_info_quirk_dtr = {
@@ -545,6 +575,7 @@.unbind     = qmi_wwan_unbind,.manage_power    = qmi_wwan_manage_power,.rx_fixup       = qmi_wwan_rx_fixup,
+  .tx_fixup       = qmi_wwan_tx_fixup,       .data           = QMI_WWAN_QUIRK_DTR,}

quectel-CM 这个应用程序, 直接改成openwrt应用程序编译进代码就可以获取到IP了.
不过用原厂给的直接编译出来是不会主动添加 DNS的,需要手动去/etc/resolv.conf dns 才能上网
下面这个是改好的包,解压放在package下面就行了,也会主动添加DNS

包下载地址: https://download.csdn.net/download/jianzhizuo/10749215
然后上成果图

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openwrt 18.06 ec20 R2.0 qmi 4G拨号上网

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