周立功IoT7000li编译移远EC20驱动记录

1.USB 串口驱动修改

1.1 增加VID和PID

 

为了使内核识别模块，需要增加模块的 VID 和 PID 信息，如程序清单 1.1 所示。
 
程序清单 1.1 增加 PID 和 VID
 
file:drivers/usb/serial/option.c
#define VIATELECOM_VENDOR_ID 0x15eb
#define VIATELECOM_PRODUCT_CDS7 0x0001

#define QUECTEL_VENNDOR_EC20 0x2c7c /* 这里的 ID 与移远给的资料不一致 */
#define QUECTEL_PRODUCT_EC20 0x0125 /* EC20 模块的 ID 就是 0x2c7c,0x0125*/
……
static const struct usb_device_id option_ids[] = {
{ USB_DEVICE(QUECTEL_VENNDOR_EC20,QUECTEL_PRODUCT_EC20) },
{ USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_COLT) },
{ USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_RICOLA) },
{ USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_RICOLA_LIGHT) },
......
#ifdef CONFIG_PM
.suspend = usb_wwan_suspend,
.resume = usb_wwan_resume,
#if 1
.reset_resume = usb_wwan_resume,
#endif


#endif






 


 


 


 


1.2 增加零件包处理


根据 USB 协议要求，需要在大容量输出传输过程中添加处理零包的机制，如程序清单 1.2 所示。


程序清单 1.2 添加零包处理






file: drivers/usb/serial/usb_wwan.c








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;
	}
	
	#endif


	return urb;
}







 


 


 


1.3 接口定义及处理


　　使用移远模块包括以下几个程序接口，表 1.1 描述了 EC20 模块在 Linux 系统中的接口信息。


 






表 1.1 EC20 接口信息




 


需要将 InterfaceNumber 大于等于 4 的接口分离出来，避免 USB 串口驱动注册，修改如程序清单 1.3 所示。


 


程序清单 1.3 屏蔽 InterfaceNumber


 


file: drivers/usb/serial/option.c 


 




static int option_probe(struct usb_serial *serial,
			const struct usb_device_id *id)
{
	struct usb_interface_descriptor *iface_desc =
				&serial->interface->cur_altsetting->desc;
	struct usb_device_descriptor *dev_desc = &serial->dev->descriptor;
	const struct option_blacklist_info *blacklist;

	/* Never bind to the CD-Rom emulation interface	*/
	if (iface_desc->bInterfaceClass == 0x08)
		return -ENODEV;

	/*
	 * Don't bind reserved interfaces (like network ones) which often have
	 * the same class/subclass/protocol as the serial interfaces.  Look at
	 * the Windows driver .INF files for reserved interface numbers.
	 */
	blacklist = (void *)id->driver_info;
	if (blacklist && test_bit(iface_desc->bInterfaceNumber,
						&blacklist->reserved))
		return -ENODEV;
	/*
	 * Don't bind network interface on Samsung GT-B3730, it is handled by
	 * a separate module.
	 */
	if (dev_desc->idVendor == cpu_to_le16(SAMSUNG_VENDOR_ID) &&
	    dev_desc->idProduct == cpu_to_le16(SAMSUNG_PRODUCT_GT_B3730) &&
	    iface_desc->bInterfaceClass != USB_CLASS_CDC_DATA)
		return -ENODEV;
		
/* modify start */
#if 1
    　　if (serial->dev->descriptor.idVendor == cpu_to_le16(QUECTEL_VENNDOR_EC20) &&
        　　serial->interface->cur_altsetting->desc.bInterfaceNumber >= 4) {
        　　printk("find the interface for EC20 NDIS\n");
        　　return -ENODEV;        
    　　}
#endif
/* modify end*/

	/* Store the blacklist info so we can use it during attach. */
	usb_set_serial_data(serial, (void *)blacklist);

	return 0;
}







 


 


 


 


1.4 删除 qcserial 驱动的 EC20 支持 


删除 qcserial 驱动的 EC20 支持，如程序清单 1.4 和程序清单 1.5 所示。




 


程序清单 1.4 删除 qmi 的 EC20 支持


 




file: drivers/net/usb/qmi_wwan.c






static const struct usb_device_id products[] = {
　　{QMI_GOBI_DEVICE(0x05c6, 0x9225)}, /* Sony Gobi 2000 Modem device (N0279, VU730) */
　　{QMI_GOBI_DEVICE(0x05c6, 0x9245)}, /* Samsung Gobi 2000 Modem device (VL176) */
　　{QMI_GOBI_DEVICE(0x03f0, 0x251d)}, /* HP Gobi 2000 Modem device (VP412) */
　　/*{QMI_GOBI_DEVICE(0x05c6, 0x9215)},*/ /* Acer Gobi 2000 Modem device (VP413) */
　　{QMI_GOBI_DEVICE(0x05c6, 0x9265)}, /* Asus Gobi 2000 Modem device (VR305) */
　　{QMI_GOBI_DEVICE(0x05c6, 0x9235)}, /* Top Global Gobi 2000 Modem device (VR306) */







 


 


　　


程序清单 1.5 删除 qcserial 的 EC20 支持




 


file: drivers/usb/serial/qcserial.c






const struct usb_device_id id_table[] = {
　　{USB_DEVICE(0x03f0, 0x241d)}, /* HP Gobi 2000 QDL device (VP412) */
　　{USB_DEVICE(0x03f0, 0x251d)}, /* HP Gobi 2000 Modem device (VP412) */
　　{USB_DEVICE(0x05c6, 0x9214)}, /* Acer Gobi 2000 QDL device (VP413) */
　　/*{USB_DEVICE(0x05c6, 0x9215)},*/ /* Acer Gobi 2000 Modem device (VP413) */
　　{USB_DEVICE(0x05c6, 0x9264)}, /* Asus Gobi 2000 QDL device (VR305) */
　　{USB_DEVICE(0x05c6, 0x9265)}, /* Asus Gobi 2000 Modem device (VR305) */
　　{USB_DEVICE(0x05c6, 0x9234)}, /* Top Global Gobi 2000 QDL device (VR306) */







 


修改完整的的包,下载


1.3.5 内核配置选项


在 make menuconfig 界面作如下所示的配置：




 


 配置完之后编译内核烧写到目标板。烧录内核后，查看是否能正常识别模块、有无 USB接口生成、AT 指令是否正常等。如程序清单 1.6 所示。


程序清单 1.6 查看模块状态 




[root@M6G2C ~]# lsusb
Bus 001 Device 001: ID 1d6b:0002
Bus 002 Device 001: ID 1d6b:0002
Bus 001 Device 002: ID 2c7c:0125
[root@M6G2C ~]#ls /dev/ttyUSB*
/dev/ttyUSB0 /dev/ttyUSB1 /dev/ttyUSB2 /dev/ttyUSB3
[root@ M6G2C ~]# microcom -s 9600 /dev/ttyUSB2
ate
OK
at+csq
+CSQ: 15,99




1.6 PPP 拨号


　　将原厂提供的 05 Driver/Linux/USB/Quectel_WCDMA<E_Linux_USB_R01A01/linux-ppp-scripts_V1.2/linux-ppp-scripts 目录下的 quectel-chat-connect、uectel-chat-disconnect、quectel-ppp 拷贝到板子/etc/ppp/peers 目录下。拷贝 pppd 和 chat 命令到板子/usr/bin 目录


下。


　　quectel-ppp 里修改串口设备名，pppd 拨号使用的 username、password 在quectel-char-connect 里修改 APN。APN、username、passward 需要从网络提供商获取。APN修改如程序清单 1.7 所示。串口设备名、username、password 修改如程序清单 1.8 所示。




 


 




程序清单 1.7 APN 修改






# /etc/ppp/peers/quectel-chat-connect
ABORT "BUSY"
ABORT "NO CARRIER"
ABORT "NO DIALTONE"
ABORT "ERROR"
ABORT "NO ANSWER"
TIMEOUT 30
"" AT
OK ATE0
OK ATI;+CSUB;+CSQ;+CPIN?;+COPS?;+CGREG?;&D2
# Insert the APN provided by your network operator, default apn is 3gnet
OK AT+CGDCONT=1,"IP","cmnet",,0,0
OK ATD*99#
CONNECT





　　


程序清单 1.8 使用的拨号串口修改






 



# /etc/ppp/peers/quectel-pppd
# Usage:root>pppd call quectel-pppd
#Modem path, like /dev/ttyUSB3,/dev/ttyACM0, depend on your module, default path is /dev/ttyUSB3
/dev/ttyUSB3 115200
#Insert the username and password for authentication, default user and password are test
user "test" password "test"
……




 


运行 pppd 命令进行拨号，正常现象如下所示。


 






[root@ M6G2C ~]# pppd call quectel-ppp &
……
local IP address 10.37.158.154
remote IP address 10.64.64.64
primaryDNS address 211.136.17.107
secondary DNS address 211.136.20.203
[root@ M6G2C ~]# ifconfig ppp0
ppp0 Link encap:Point-to-Point Protocol 
inet addr:10.37.158.154 P-t-P:10.64.64.64 Mask:255.255.255.255
UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1500 Metric:1
RX packets:4 errors:0 dropped:0 overruns:0 frame:0
TX packets:5 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:3 
RX bytes:52 (52.0 B) TX bytes:183 (183.0 B)
[root@ M6G2C ~]#echo "nameserver 8.8.8.8" > /etc/resolv.conf
[root@ M6G2C ~]# ping www.baidu.com
PING baidu.com (123.125.114.144): 56 data bytes
64 bytes from 123.125.114.144: seq=0 ttl=53 time=102.081 ms
64 bytes from 123.125.114.144: seq=1 ttl=53 time=113.556 ms
64 bytes from 123.125.114.144: seq=2 ttl=53 time=84.534 ms





　　






























            

            
posted @ 
2021-10-26 16:45 
流逝的轻风 
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