Quectel EM05/EC20 4G模组使用-基于openw

2019-06-27 本文已影响0人 Mr_Michael

一、模块简介

使用M.2物理接口，usb通信接口
支持大下行速率为150Mbps，大上行速率为50Mbps。
其包含三个版本：EM05-CE、EM05-CML和 EM05-E*，能在LTE-FDD、LTE-TDD、DC-HSDPA、HSPA+、HSDPA、HSUPA、WCDMA和CDMA等多种网络制式中进行数据通信。

二、模块使用

1.修改linux内核

1）移植USB Serial驱动

移植后模块连接到USB串行驱动时，驱动程序将在目录/dev中创建设备文件USB0/ttyUSB1/ttyUSB2…

增加PID&VID

修改openwrt/build_dir/target-mipsel_24kc_glibc-2.24/linux-ramips_mt7688/linux-4.4.167/drivers/usb/serial/option.c文件

static const struct usb_device_id option_ids[] = {
#if 1 //Added by Quectel
{ USB_DEVICE(0x05C6, 0x9090) }, /* Quectel UC15 */
{ USB_DEVICE(0x05C6, 0x9003) }, /* Quectel UC20 */
{ USB_DEVICE(0x2C7C, 0x0125) }, /* Quectel EC25 EM05*/
{ USB_DEVICE(0x2C7C, 0x0121) }, /* Quectel EC21 */
{ USB_DEVICE(0x05C6, 0x9215) }, /* Quectel EC20 */
{ USB_DEVICE(0x2C7C, 0x0191) }, /* Quectel EG91 */
{ USB_DEVICE(0x2C7C, 0x0195) }, /* Quectel EG95 */
{ USB_DEVICE(0x2C7C, 0x0306) }, /* Quectel EG06/EP06/EM06 */
{ USB_DEVICE(0x2C7C, 0x0296) }, /* Quectel BG96 */
{ USB_DEVICE(0x2C7C, 0x0435) }, /* Quectel AG35 */
#endif

添加零包处理

修改openwrt/build_dir/target-mipsel_24kc_glibc-2.24/linux-ramips_mt7688/linux-4.4.167/drivers/usb/serial/usb_wwan.c文件

static struct urb *usb_wwan_setup_urb(struct usb_serial_port *port,
                      int endpoint,
                      int dir, void *ctx, char *buf, int len,
                      void (*callback) (struct urb *))
{
    struct usb_serial *serial = port->serial;
    struct urb *urb;

    urb = usb_alloc_urb(0, GFP_KERNEL); /* No ISO */
    if (!urb)
        return NULL;

    usb_fill_bulk_urb(urb, serial->dev,
              usb_sndbulkpipe(serial->dev, endpoint) | dir,
              buf, len, callback, ctx);
              
#if 1 //Added by Quectel for zero packet
    if (dir == USB_DIR_OUT) {
        struct usb_device_descriptor *desc = &serial->dev->descriptor;
        if (desc->idVendor == cpu_to_le16(0x05C6) && desc->idProduct == cpu_to_le16(0x9090))
            urb->transfer_flags |= URB_ZERO_PACKET;
        if (desc->idVendor == cpu_to_le16(0x05C6) && desc->idProduct == cpu_to_le16(0x9003))
            urb->transfer_flags |= URB_ZERO_PACKET;
        if (desc->idVendor == cpu_to_le16(0x05C6) && desc->idProduct == cpu_to_le16(0x9215))
            urb->transfer_flags |= URB_ZERO_PACKET;
        if (desc->idVendor == cpu_to_le16(0x2C7C))
            urb->transfer_flags |= URB_ZERO_PACKET;
        if (desc->idVendor == cpu_to_le16(0x1286) && desc->idProduct == cpu_to_le16(0x4e3d))
        {
            urb->transfer_flags |= URB_ZERO_PACKET;
        }
    }
#endif

    return urb;
}

增加休眠后唤醒接口
- 当MCU进入暂停/休眠模式时，一些USB主机控制器/USB集线器将失去电源或重新设置，并且在MCU退出暂停/休眠模式后，它们不能恢复USB设备。请添加以下语句以启用重新设置恢复过程。
- 修改openwrt/build_dir/target-mipsel_24kc_glibc-2.24/linux-ramips_mt7688/linux-4.4.167/drivers/usb/serial/option.c文件。
```
static struct usb_serial_driver option_1port_device = {
……
#ifdef CONFIG_PM
    .suspend = usb_wwan_suspend,
    .resume = usb_wwan_resume,
#if 1 //Added by Quectel
    .reset_resume = usb_wwan_resume,
#endif
#endif
};
```

2.修改openwrt配置

执行命令make menuconfig进入配置

1）内核模块

Kernel modules >>
    USB Support >>
        <*> Kmod -usb-core
        -*-Kmod -usb-net
        -*- kmod-usb-net-cdc-ether//【可选】
        <*> kmod-usb-net-cdc-mbim
        -*- kmod-usb-net-cdc-ncm
        <*> kmod-usb-net-cdc-subset//【可选】
        <*>kmod-usb-net-qmi-wwan
        <*>Kmod-usb-ohci     //这个选项一定要勾选，否则可能无法在系统中查看设备
        <*>Kmod-usb-serial
        <*>Kmod-usb-serial-option
        <*>Kmod-usb-serial-wwan
        <*>kmod-usb-uhci
        <*>Kmod-usb2

2）网络配置

NetWork   >>
    <*>wwan
    <*>chat
    <*>ppp
    <*>uqmi
    <*>umbim

3）Utilities配置

Utilities
  <*>comgt
  <*>usb-modeswitch //自动模式更改，将设备置于USB调制解调器模式
  <*>usbutils//【可选，可查看usb设备】

4）Luci配置

Luci
1. Collections
        <*> luci
3. Applications
        <*> luci-app-multiwan (optional to support multiple 3g dongles)//新版本为mwan3 【可选】
        <*> luci-app-qos (optional to provide QOS support)//【可选】
6. Protocols
        <*> luci-proto-3g
        -*- luci-proto-ppp

3.网关配置

1）接入4G模块后，使用ls /dev命令，可以看到usb转串口设备

lsusb 命令查看usb设备

root@LEDE:~# lsusb
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 012: ID 2c7c:0125  #PID-2c7c：VID-0125
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

2）使用USB 3g / UMTS-modem进行WAN连接

参考https://openwrt.org/docs/guide-user/network/wan/wwan/3gdongle

修改\etc\config\network配置

config interface '4G'
        option ifname 'ppp0'
        option _orig_ifname 'eth0.2'
        option _orig_bridge 'false'
        option proto '3g'
        option device '/dev/ttyUSB2'
        option service 'umts'
        option ipv6 'auto'
        option keepalive '10 5'
        option metric '0'

重启网络

/etc/init.d/network restart

等待4G连接成功

root@LEDE:~# ifconfig 
3g-4G     Link encap:Point-to-Point Protocol  
          inet addr:10.124.22.77  P-t-P:10.64.64.64  Mask:255.255.255.255
          UP POINTOPOINT RUNNING NOARP MULTICAST  MTU:1500  Metric:1
          RX packets:25 errors:0 dropped:0 overruns:0 frame:0
          TX packets:58 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:3 
          RX bytes:1762 (1.7 KiB)  TX bytes:3818 (3.7 KiB)

br-lan    Link encap:Ethernet  HWaddr C6:E5:72:41:19:1D  
          inet addr:192.168.2.1  Bcast:192.168.2.255  Mask:255.255.255.0
          inet6 addr: fe80::c4e5:72ff:fe41:191d/64 Scope:Link
          inet6 addr: fd3f:6922:178d::1/60 Scope:Global
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:19 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:0 (0.0 B)  TX bytes:2610 (2.5 KiB)

eth0      Link encap:Ethernet  HWaddr 40:D6:3C:1E:70:14  
          inet6 addr: fe80::42d6:3cff:fe1e:7014/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:5519 errors:0 dropped:4 overruns:0 frame:0
          TX packets:1579 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:476283 (465.1 KiB)  TX bytes:152174 (148.6 KiB)
          Interrupt:5 

eth0.1    Link encap:Ethernet  HWaddr C6:E5:72:41:19:1D  
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:19 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:0 (0.0 B)  TX bytes:2610 (2.5 KiB)

eth0.2    Link encap:Ethernet  HWaddr C6:E5:72:41:19:1E  
          inet addr:192.168.3.94  Bcast:192.168.3.255  Mask:255.255.255.0
          inet6 addr: fe80::c4e5:72ff:fe41:191e/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:1170 errors:0 dropped:0 overruns:0 frame:0
          TX packets:280 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:70616 (68.9 KiB)  TX bytes:22980 (22.4 KiB)

lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:2204 errors:0 dropped:0 overruns:0 frame:0
          TX packets:2204 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1 
          RX bytes:189751 (185.3 KiB)  TX bytes:189751 (185.3 KiB)

wlan0     Link encap:Ethernet  HWaddr 40:D6:3C:1E:70:14  
          inet6 addr: fe80::42d6:3cff:fe1e:7014/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:13 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:0 (0.0 B)  TX bytes:1856 (1.8 KiB)