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移远EC20 4G模块Linux驱动移植和测试

时间：2023-02-11 17:11:45浏览次数：42  
标签：26 01 usb 45 00 移远 EC20 Linux serial

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PS: 这个只是基于《我自己》的理解，

如果和你的原则及想法相冲突，请谅解，勿喷。

前置说明

  本文作为本人csdn blog的主站的备份。（BlogID=046）
  本文发布于 2017-11-21 10:28:14，现用MarkDown+图床做备份更新。blog原图已丢失，使用csdn所存的图进行更新。（BlogID=046）

环境说明

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前言

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EC20 驱动移植与测试



EC20简介

  EC20是一个全网通的4G模块，并提供了详细的驱动移植资料（源码+文档），我也仅仅是照着文档，一点点的改，并建立起来一个可用的环境。



EC20驱动移植准备
  1. 首先你会从厂家拿到一个资料文件，并解压（类似Quectel_GobiNetSR01A02V16.zip）
  2. 你会找到一个用户手册的PDF打开（类似Quectel_WCDMA&LTE_Linux_USB_Driver_User_Guide_V1.6.pdf）
  3. 这里还有一个Readme.txt告诉你需要阅读上文pdf的哪些内容。可能如下：
About GobiNet driver, please refer to the chapter 3.2、3.4、5.4、6
About ConnectManager，please refer to the chapter 5.4
  1. 按照pdf指示如下。


EC20 Linux驱动移植
  1. 增加PID&VID（对着两个不了解的，建议去找找资料来看看，这个的意思可以简单理解为这个设备的唯一标识）
    [KERNEL]/drivers/usb/serial/option.c
static const struct usb_device_id option_ids[] = {
	#if 1 //Added by Sky  
	{ USB_DEVICE(0x05C6, 0x9090) }, /* Quectel UC15 */  
	{ USB_DEVICE(0x05C6, 0x9003) }, /* Quectel UC20 */  
	{ USB_DEVICE(0x05C6, 0x9215) }, /* Quectel EC20 */  
	{ USB_DEVICE(0x2C7C, 0x0125) }, /* Quectel EC25/EC20 R2.0 */  
	{ USB_DEVICE(0x2C7C, 0x0121) }, /* Quectel EC21 */ 
	#endif

  这里其实只需要{ USB_DEVICE(0x05C6, 0x9215) }, /* Quectel EC20 */ 这一项，其他是无关紧要的，可以不放进去。option_ids[]就是一usb serial的设备pid，vid表。

  1. 注释掉冲突的vid以及pid设备（我猜存在相同的vid和pid是历史的原因）
    [KERNEL]/drivers/usb/serial/qcserial.c
	//Comment by Sky,
	//{USB_DEVICE(0x05c6, 0x9215)},	/* Acer Gobi 2000 Modem device (VP413) */

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

	//comment by Sky
	//{QMI_GOBI_DEVICE(0x05c6, 0x9215)},	/* Acer Gobi 2000 Modem device (VP413) */

  注意这里貌似只有EC20的冲突了。

  1. 添加零包处理（这个和usb 协议中的批量传输有关）
    For Linux Kernel Version newer than 2.6.34:

File: [KERNEL]/drivers/usb/serial/usb_wwan.c

	usb_fill_bulk_urb(urb, serial->dev,      usb_sndbulkpipe(serial->dev, endpoint) | dir,      buf, len, callback, ctx);
	#if 1 //Added by Sky 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

  注意，pdf上还有For Linux Kernel Version older than 2.6.35的内容，请自行根据内核版本查看。

  1. 增加休眠后唤醒接口

For Linux Kernel Version newer than 3.4:

File: [KERNEL]/drivers/usb/serial/option.c

static struct usb_serial_driver option_1port_device = {
	.driver = {
		.owner =	THIS_MODULE,
		.name =		"option1",
	},
	.description       = "GSM modem (1-port)",
	.id_table          = option_ids,
	.num_ports         = 1,
	.probe             = option_probe,
	.open              = usb_wwan_open,
	.close             = usb_wwan_close,
	.dtr_rts	   = usb_wwan_dtr_rts,
	.write             = usb_wwan_write,
	.write_room        = usb_wwan_write_room,
	.chars_in_buffer   = usb_wwan_chars_in_buffer,
	.set_termios       = usb_wwan_set_termios,
	.tiocmget          = usb_wwan_tiocmget,
	.tiocmset          = usb_wwan_tiocmset,
	.ioctl             = usb_wwan_ioctl,
	.attach            = option_attach,
	.release           = option_release,
	.port_probe        = usb_wwan_port_probe,
	.port_remove	   = usb_wwan_port_remove,
	.read_int_callback = option_instat_callback,
#ifdef CONFIG_PM
	.suspend           = usb_wwan_suspend,
	.resume            = usb_wwan_resume,
	#if 1  //Added by Sky  
	.reset_resume   = usb_wwan_resume, 
	#endif 
#endif
};
  1. 如果要使用 GobiNet or QMI WWAN，需要阻止第四个接口注册为串口。
    For Linux Kernel Version newer than 2.6.30:

File: [KERNEL]/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;

	/* 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.
	 */
	if (is_blacklisted(
		iface_desc->bInterfaceNumber,
		OPTION_BLACKLIST_RESERVED_IF,
		(const struct option_blacklist_info *) id->driver_info))
		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;


		#if 1  //Added by Sky 
		//Quectel UC20's interface 4 can be used as USB Network device  
		if (serial->dev->descriptor.idVendor == cpu_to_le16(0x05C6) && serial->dev->descriptor.idProduct == cpu_to_le16(0x9003)  \
			 && serial->interface->cur_altsetting->desc.bInterfaceNumber >= 4)   
		return -ENODEV; 
		//Quectel EC20's interface 4 can be used as USB Network device  
		if (serial->dev->descriptor.idVendor == cpu_to_le16(0x05C6) && serial->dev->descriptor.idProduct == cpu_to_le16(0x9215)  \
			&& serial->interface->cur_altsetting->desc.bInterfaceNumber >= 4)   
			return -ENODEV; 
			//Quectel EC21&EC25&EC20 R2.0's interface 4 can be used as USB Network device  
		if (serial->dev->descriptor.idVendor == cpu_to_le16(0x2C7C)   \
			&& serial->interface->cur_altsetting->desc.bInterfaceNumber >= 4)   
			return -ENODEV; 
		#endif 


	/* Store device id so we can use it during attach. */
	usb_set_serial_data(serial, (void *)id);

	return 0;
}
  1. 修改内核配置，并编译内核，刷入新内核
      添加USB 串口 GSM 和 CDMA 驱动选项
rep_img

  启用USB网络支持

rep_img

  添加驱动代码

//Step 5: Please add the following statements to file "[KERNEL]/drivers/net/usb/Makefile" ([KERNEL]/drivers/usb/net/Makefile if the kernel version is older than 2.6.22). 
obj-y += GobiNet.o 
GobiNet-objs := GobiUSBNet.o QMIDevice.o QMI.o
  1. quectel-CM 测试
//交叉编译quectel-CM 
/*quectel-CM will  call busybox udhpc to obtain IP and NDS, and busybox udhpc will call script file /usr/share/udhcpc/default.script to set IP/DNS/Routing table for Linux board. You can download this tool’s source code from https://busybox.net/. You should enable CONFIG_UDHCPC in busybox menuconfig，and copy the script file [BUSYBOX]/examples/udhcp/simple.script to your Linux board (renamed as /usr/share/udhcpc/default.script). */
quectel-CM –s ctnet & 
[01-01_00:26:45:355] Quectel_ConnectManager_SR01A01V10 
[01-01_00:26:45:356] ./quectel-CM profile = ctnet///, pincode =  
[01-01_00:26:45:357] Find qmichannel = /dev/qcqmi2 
[01-01_00:26:45:358] Find usbnet_adapter = eth2 
[01-01_00:26:45:368] Get clientWDS = 7 
[01-01_00:26:45:400] Get clientDMS = 8 
[01-01_00:26:45:432] Get clientNAS = 9 
[01-01_00:26:45:464] Get clientWDA = 10 
[01-01_00:26:45:496] requestBaseBandVersion EC20CQAR02A03E2G_BETA0914  1  [Sep 14 2015 13:51:27] 
[01-01_00:26:45:560] requestGetSIMStatus SIMStatus: SIM_READY 
[01-01_00:26:45:624] requestGetProfile ctnet///0 
[01-01_00:26:45:656] requestRegistrationState MCC: 460, MNC: 11, PS: Attached, DataCap: LTE 
[01-01_00:26:45:688] requestQueryDataCall ConnectionStatus: DISCONNECTED 
[01-01_00:26:45:720] requestRegistrationState MCC: 460, MNC: 11, PS: Attached, DataCap: LTE 
[01-01_00:26:45:752] requestQueryDataCall ConnectionStatus: DISCONNECTED 
[01-01_00:26:45:816] requestSetupDataCall WdsConnectionIPv4Handle: 0x43cc4478 
[01-01_00:26:45:912] requestQueryDataCall ConnectionStatus: CONNECTED 
[01-01_00:26:45:937] udhcpc (v1.20.2) started 
[01-01_00:26:45:956] Sending discover... 
[01-01_00:26:45:960] Sending select for 10.172.27.151... 
[01-01_00:26:45:964] Lease of 10.172.27.151 obtained, lease time 7200 
[01-01_00:26:45:984] deleting routers 
route: SIOCDELRT: No such process 
[01-01_00:26:46:003] adding dns 61.132.163.68 
[01-01_00:26:46:003] adding dns 202.102.213.68

  注意，这里需要UDHCPC ，检测你的busybox是否有这个东西，如果不存在，你需要重新移植busybox，启用CONFIG_UDHCPC选项。还需要配置一个配置文件，注意检查。

  特别提示，其中很多关于内核源码修改，以及内核配置修改，不同的版本有不同的写法，文档里面都有详细说明，请使用时，特别注意。





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PS: 要转载请注明出处，本人版权所有。

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标签：26,01,usb,45,00,移远,EC20,Linux,serial
From： https://www.cnblogs.com/Iflyinsky/p/17112086.html

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