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本文由博主girlkoo编写,关于E9与TQIMX6Q开发平台网卡驱动移植的文章。
由于对网卡这块不是很熟悉,误以为网卡驱动也可以简单的配置下DTS就可以正常工作了,实际移植中遇到了些问题。闲话少说,下面开始tqimx6q的网卡驱动移植。
DTS编写
首先在我们的DTS中添加网卡配置,参考sabrelite的DTS,我们可以如下编写:
- &fec {
- pinctrl-names = "default";
- pinctrl-0 = <&pinctrl_enet_1>;
- phy-mode = "rgmii";
- status = "okay";
- };
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开始以为添加以上内容后编译并烧写DTB就可以正常工作了,实则不然,还需要添加PHY相关的配置代码。
PHY配置
打开arch/arm/mach-imx/mach-imx6q.c,在宏PHY_ID_AR8031附近做如下修改:
- static int ar8035_phy_fixup(struct phy_device *dev)
- {
- u16 val;
-
-
- /* Ar803x phy SmartEEE feature cause link status generates glitch,
- * which cause ethernet link down/up issue, so disable SmartEEE
- */
- phy_write(dev, 0xd, 0x3);
- phy_write(dev, 0xe, 0x805d);
- phy_write(dev, 0xd, 0x4003);
-
-
- val = phy_read(dev, 0xe);
- phy_write(dev, 0xe, val & ~(1 << 8));
-
-
- /*
- * Enable 125MHz clock from CLK_25M on the AR8031. This
- * is fed in to the IMX6 on the ENET_REF_CLK (V22) pad.
- * Also, introduce a tx clock delay.
- *
- * This is the same as is the AR8031 fixup.
- */
- ar8031_phy_fixup(dev);
-
-
- /*check phy power*/
- val = phy_read(dev, 0x0);
- if (val & BMCR_PDOWN)
- phy_write(dev, 0x0, val & ~BMCR_PDOWN);
-
-
- return 0;
- }
-
- #define PHY_ID_AR8035 0x004dd072
-
- static void __init imx6q_enet_phy_init(void)
- {
- if (IS_BUILTIN(CONFIG_PHYLIB)) {
- phy_register_fixup_for_uid(PHY_ID_KSZ9021, MICREL_PHY_ID_MASK,
- ksz9021rn_phy_fixup);
- phy_register_fixup_for_uid(PHY_ID_KSZ9031, MICREL_PHY_ID_MASK,
- ksz9031rn_phy_fixup);
- phy_register_fixup_for_uid(PHY_ID_AR8031, 0xffffffff,
- ar8031_phy_fixup);
- phy_register_fixup_for_uid(PHY_ID_AR8035, 0xffffffff,
- ar8035_phy_fixup);
- }
- }
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即添加AR8035的ID,并初始化AR8035的寄存器,具体的含义我还没有来得及分析,以上修改参考了:
http://lxr.free-electrons.com/so ... ch-imx/mach-imx6q.c
完成以上修改之后重新编译uImage和dtb,然后烧写开发板即可。
测试方法
寻求网卡的测试方法目标应该很明确,就是能ping通外网即可,下面是我在tqimx6q上的测试步骤。
Step1. 查看网卡信息
执行命令:
效果如下:
- @tqimx6q #ifconfig -a
- eth0 Link encap:Ethernet HWaddr AA:EF:AE:8A:EA:05
- BROADCAST MULTICAST MTU:1500 Metric:1
- RX packets:0 errors:0 dropped:0 overruns:0 frame:0
- TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
- collisions:0 txqueuelen:1000
- RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
-
- lo Link encap:Local Loopback
- LOOPBACK MTU:65536 Metric:1
- RX packets:0 errors:0 dropped:0 overruns:0 frame:0
- TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
- collisions:0 txqueuelen:0
- RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
-
- sit0 Link encap:IPv6-in-IPv4
- NOARP MTU:1480 Metric:1
- RX packets:0 errors:0 dropped:0 overruns:0 frame:0
- TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
- collisions:0 txqueuelen:0
- RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
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Step2. 使能网卡eth0,执行命令:
效果如下:
- @tqimx6q #ifconfig eth0 up
- fec 2188000.ethernet eth0: Freescale FEC PHY driver [Generic PHY] (mii_bus:phy_addr=2188000.ethernet:00, irq=-1)
- IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
- @tqimx6q #libphy: 2188000.ethernet:00 - Link is Up - 100/Full
- IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
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Step3. 动态获取IP,执行指令:
效果如下:
- @tqimx6q #udhcpc
- udhcpc (v1.22.1) started
- Sending discover...
- Sending select for 192.168.0.106...
- Lease of 192.168.0.106 obtained, lease time 86400
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Step4. 将动态获取的IP设置给网卡eth0,执行指令:
- ifconfig eth0 192.168.0.106
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之后可以通过命令查看网卡配置信息:
效果如下:
- @tqimx6q #ifconfig eth0 192.168.0.106
- @tqimx6q #ifconfig eth0
- eth0 Link encap:Ethernet HWaddr AA:EF:AE:8A:EA:05
- inet addr:192.168.0.106 Bcast:192.168.0.255 Mask:255.255.255.0
- inet6 addr: fe80::a8ef:aeff:fe8a:ea05/64 Scope:Link
- UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
- RX packets:253 errors:0 dropped:0 overruns:0 frame:0
- TX packets:8 errors:0 dropped:0 overruns:0 carrier:0
- collisions:0 txqueuelen:1000
- RX bytes:24238 (23.6 KiB) TX bytes:1152 (1.1 KiB)
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Step5. 设置网关,执行指令:
- route add default gw 192.168.0.1
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Step6. 通过ping指令测试网络状态,执行指令:
效果如下:
- @tqimx6q #ping 8.8.8.8
- PING 8.8.8.8 (8.8.8.8): 56 data bytes
- 64 bytes from 8.8.8.8: seq=0 ttl=43 time=77.409 ms
- 64 bytes from 8.8.8.8: seq=1 ttl=43 time=83.292 ms
- 64 bytes from 8.8.8.8: seq=2 ttl=43 time=88.236 ms
- 64 bytes from 8.8.8.8: seq=3 ttl=43 time=80.713 ms
- 64 bytes from 8.8.8.8: seq=4 ttl=43 time=74.452 ms
- 64 bytes from 8.8.8.8: seq=5 ttl=43 time=78.627 ms
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可见,tqimx6q已经可以ping通谷歌的DNS服务器了。至此,网卡的移植工作就完成了,PHY相关的配置还没有仔细研究就来分享了,请见谅。文章编写匆忙,如有问题请帮忙指出,有疑问可以留言讨论。
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