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A40i-linux5.10-支持usb虚拟网卡

2024-7-31 10:23| 发布者: yhj_nb| 查看: 99| 评论: 0

类目：知识库 > A40i/T3系列产品文档编号: 1472

一、加载内核驱动

进入图形化配置界面

forlinx@ubuntu:~/work/OKA40i-linux-sdk$ ./build.sh menuconfig

按如下配置

Device Drivers --->

[ * ] USB support --->

<*> USB Gadget Support --->

[ * ] Ethernet Control Model (CDC ECM)

[ * ] RNDIS

Device Drivers --->

[ * ] USB support --->

<*> USB Gadget Support --->

USB Gadget precomposed configurations --->

<M> Ethernet Gadget (with CDC Ethernet support)

[ * ] RNDIS support

修改完后执行

forlinx@ubuntu:~/work/OKA40i-linux-sdk$ ./build.sh saveconfig

二、修改驱动

如下为修改patch：

OKA40i-linux-sdk/kernel

diff --git a/linux-5.10/drivers/usb/gadget/function/u_ether.c b/linux-5.10/drivers/usb/gadget/function/u_ether.c

old mode 100644

new mode 100755

index 64ef97ab9..45590e3ef

--- a/linux-5.10/drivers/usb/gadget/function/u_ether.c

+++ b/linux-5.10/drivers/usb/gadget/function/u_ether.c

@@ -218,7 +218,11 @@ rx_submit(struct eth_dev *dev, struct usb_request *req, gfp_t gfp_flags)

size = max_t(size_t, size, dev->port_usb->fixed_out_len);

spin_unlock_irqrestore(&dev->lock, flags);

- skb = __netdev_alloc_skb(dev->net, size + NET_IP_ALIGN, gfp_flags);

+ #ifdef CONFIG_USB_SUNXI_UDC0

+ skb = netdev_alloc_skb_ip_align((struct net_device *)dev, size);

+ #else

+ skb = __netdev_alloc_skb((struct net_device *)dev, size + NET_IP_ALIGN, gfp_flags);

+ #endif

if (skb == NULL) {

DBG(dev, "no rx skb\n");

goto enomem;

OKA40i-linux-sdk/bsp

diff --git a/drivers/usb/sunxi_usb/udc/sunxi_udc.c b/drivers/usb/sunxi_usb/udc/sunxi_udc.c

old mode 100644

new mode 100755

index 4972dbb..1402213

--- a/drivers/usb/sunxi_usb/udc/sunxi_udc.c

+++ b/drivers/usb/sunxi_usb/udc/sunxi_udc.c

@@ -2620,6 +2620,7 @@ static int sunxi_udc_queue(struct usb_ep *_ep,

struct sunxi_udc *dev = NULL;

unsigned long flags = 0;

u8 old_ep_index = 0;

+ int ret;

if (_ep == NULL || _req == NULL) {

DMSG_PANIC("ERR: invalid argment\n");

@@ -2650,13 +2651,18 @@ static int sunxi_udc_queue(struct usb_ep *_ep,

return -EINVAL;

}

- sunxi_udc_handle_unaligned_buf_start(ep, req);

+ //sunxi_udc_handle_unaligned_buf_start(ep, req);

spin_lock_irqsave(&ep->dev->lock, flags);

_req->status = -EINPROGRESS;

_req->actual = 0;

if (is_sunxi_udc_dma_capable(req, ep)) {

spin_unlock_irqrestore(&ep->dev->lock, flags);

+ ret = sunxi_udc_handle_unaligned_buf_start(ep, req);

+ if (ret)

+ return ret;

sunxi_udc_map_dma_buffer(req, dev, ep);

spin_lock_irqsave(&ep->dev->lock, flags);

}

三、其他修改

取消adb服务开机自启，有两种操作方式：

1. 开发板里操作

删除 /etc/init.d/S50adb_start 文件或者将其重命名为bak-S50adb_start

2. 源码里操作（改完后再编译）

删除 OKA40i-linux-sdk/out/a40i_h/OKA40i-C/buildroot/buildroot/target/etc/init.d/S50adb_start 文件或者将其重命名为bak-S50adb_start

四、使用方式

做完上述修改后，执行全编译，然后打包生成新镜像

在开发板中加载对应模块

[root@Tina5 ~]# insmod /lib/modules/5.10.149/g_ether.ko

之后可以看到对应的usb0网卡

然后在windows端识别为了网络模块

已解决

未解决

只是看看

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