RK3588编解码盒子之RTL8211FS-CG光口调试
本文是基于RK3588平台，SDK版本：RK3588_ANDROID12 0RTL8211FS-CG光口调试总结。
2023-06-10 09:09:59
RK3588编解码盒子之RTL8211FS-CG光口调试
2023-06-10 09:09:59 来源：jf_30051736
(资料图)
1. 简介
本文是基于RK3588平台，SDK版本：RK3588_ANDROID12.0 RTL8211FS-CG光口调试总结。视频桥接芯片：RTL8211FS-CG驱动代码："kernel/drivers/net/phy/realtek.c"本次调试的方案功能：RK3588 调试RTL8211FS-CG 转接出光口2. 硬件部分
硬件工程师参考RTL8211FS-CG发布的设计图设计
以下为部分截图
在设计过程中参考realtek发过的参考设计，建议咨询一下phy厂家，看有哪些注意地方
注意： 8211FS使用外部3.3V，电平要与主控GMAC1相匹配；
使用UTP<->RGMII的接法，且CFG_MODE2：0＝010兼容光口和电口；
3. 软件部分
建议先调电口RJ45，调通后再接光口，可能更容易；调电口时先插百兆网线调百兆，成功后再换千兆网线
3.1 代码
3.1.1 Realtek phy的内核配置
在kernel下输入make menuconfig
Device Drivers --- >[*] Network device support --- >-*- PHY Device support and infrastructure --- > -*- Realtek PHYs这样realtek.c就可以编译到kernel了
3.1.2 dts配置
&gmac1 { /* Use rgmii-rxid mode to disable rx delay inside Soc */ phy-mode = "rgmii-rxid"; clock_in_out = "output"; snps,reset-gpio = < &gpio3 RK_PB7 GPIO_ACTIVE_LOW >; snps,reset-active-low; /* Reset time is 20ms, 100ms for rtl8211f */ snps,reset-delays-us = < 0 20000 100000 >; pinctrl-names = "default"; pinctrl-0 = < &gmac1_miim &gmac1_tx_bus2 &gmac1_rx_bus2 &gmac1_rgmii_clk &gmac1_rgmii_bus &gmac1_clkinout >; tx_delay = < 0x43 >; /* rx_delay = < 0x4f >; */ phy-handle = < &rgmii_phy1 >; status = "okay";};&mdio1 { rgmii_phy1: phy@1 { compatible = "ethernet-phy-ieee802.3-c22"; reg = < 0x1 >; };};3.1.3 代码验证
插千兆网线有相关打印且可以ping通百度
此时插光口没有分配IP地址
3.1.4 调试
打开IO调试命令
CONFIG_DEVMEM=y
3.1.5 操作寄存器
find /sys -name phy_registers//先找到以太网寄存器的配置节点并进入所在目录echo 31 0xdc0 >phy_registers //切换到PHY的PAGE 0xdc0cat phy_registers //读取当前PAGE寄存器的值,核对PHYID1,PHYID2是否正确来确认寄存器是否正确echo 0 0x value >phy_registers //改写PAGE0第0个寄存器的值为需要的valuecat phy_registers //读取值检查是否修改成功echo 31 0 > phy_registers //切回到PAGE0寄存器！！！！重要，一定写完要切回来才会生效如果修改无效，参阅PHY规格书的8.5章节修改
3.1.6 将芯片强制固定光口模式
setup_fiber_mode
#endif+static int phy_8211fS_fiber_mode_fixup(struct phy_device *phydev)+{int i;+printk("%s in\\\\n", __func__);+phy_write(phydev, 31, 0xdc0 );+ phy_write(phydev, 16, 0x79ad);+ //phy_write(phydev, 20, 0x79ad );+printk("page 0xdc0 register\\\\n");+for(i =0; i< 8,i++)+printk("%d: %x\\\\n",i,phy_read(phydev,i));+ phy_write(phydev, 31, 0xdc1 );+ printk("23: %x\\\\n", phy_read(phydev,23));+ phy_write(phydev, 31, 0x0 );+ printk("page 0 register\\\\n");+for(i =0; i< 32,i++)+printk("%d: %x\\\\n",i,phy_read(phydev,i));++return 0;+}/** * stmmac_dvr_probe * @device: device pointer#ifdef CONFIG_DWMAC_RK_AUTO_DELAYLINEINIT_DELAYED_WORK(&priv- >scan_dwork, stmmac_scan_delayline_dwork);#endif+ret = phy_register_fixup_for_uid(RTL_8211FS_PHY_ID, 0xffffffff, +phy_8211fS_fiber_mode_fixup);+if (ret)+pr_warn("Cannot register PHY board fixup.\\\\n");return ret;error_netdev_register:编译烧写之后网口灯状态已经变为光口模式了，此时插入光口还是无法分配IP地址
3.1.7 补丁
--- a/kernel/drivers/net/phy/realtek.c+++ b/kernel/drivers/net/phy/realtek.c@@ -46,6 +46,11 @@ #define RTL8366RB_POWER_SAVE0x15 #define RTL8366RB_POWER_SAVE_ONBIT(12) +#define RTL8211FS_FIBER_ESR0x0F+#define RTL8211FS_MODE_MASK0xC000+#define RTL8211F_MODE_COPPER0+#define RTL8211FS_MODE_FIBER1+ #define RTL_SUPPORTS_5000FULLBIT(14) #define RTL_SUPPORTS_2500FULLBIT(13) #define RTL_SUPPORTS_10000FULLBIT(0)@@ -58,6 +63,10 @@ #define RTL_GENERIC_PHYID0x001cc800 +struct rtl8211f_priv {+int lastmode;+};+ MODULE_DESCRIPTION("Realtek PHY driver"); MODULE_AUTHOR("Johnson Leung"); MODULE_LICENSE("GPL");@@ -93,7 +102,6 @@ static int rtl821x_ack_interrupt(struct phy_device *phydev) static int rtl8211f_ack_interrupt(struct phy_device *phydev) { int err;- err = phy_read_paged(phydev, 0xa43, RTL8211F_INSR); return (err < 0) ? err : 0;@@ -140,7 +148,6 @@ static int rtl8211e_config_intr(struct phy_device *phydev) static int rtl8211f_config_intr(struct phy_device *phydev) { u16 val;- if (phydev- >interrupts == PHY_INTERRUPT_ENABLED) val = RTL8211F_INER_LINK_STATUS; else@@ -242,7 +249,7 @@ static int rtl8211f_config_init(struct phy_device *phydev) "2ns RX delay was already %s (by pin-strapping RXD0 or bootloader configuration)\\\\n", val_rxdly ? "enabled" : "disabled"); }-+ return 0; } @@ -560,6 +567,89 @@ static int rtlgen_resume(struct phy_device *phydev) return ret; } +static int rtl8211f_probe(struct phy_device *phydev)+{+struct device *dev = &phydev- >mdio.dev;+struct rtl8211f_priv *priv;++priv = devm_kzalloc(dev, sizeof(struct rtl8211f_priv), GFP_KERNEL);+if (!priv)+return -ENOMEM;++phydev- >priv = priv;++return 0;+}++static void rtl8211f_remove(struct phy_device *phydev)+{+struct device *dev = &phydev- >mdio.dev;+struct rtl8211f_priv *priv = phydev- >priv;++if (priv)+devm_kfree(dev, priv);+}++static int rtl8211f_mode(struct phy_device *phydev)+{+u16 val;++val = phy_read(phydev, RTL8211FS_FIBER_ESR);+val &= RTL8211FS_MODE_MASK;++if(val)+return RTL8211FS_MODE_FIBER;+else+return RTL8211F_MODE_COPPER;+}++static int rtl8211f_config_aneg(struct phy_device *phydev)+{+int ret;++struct rtl8211f_priv *priv = phydev- >priv;++ret = genphy_read_abilities(phydev);+if(ret < 0)+return ret;++linkmode_copy(phydev- >advertising, phydev- >supported);++if (rtl8211f_mode(phydev) == RTL8211FS_MODE_FIBER) {+dev_info(&phydev- >mdio.dev, "Fiber Mode");+priv- >lastmode = RTL8211FS_MODE_FIBER;+return genphy_c37_config_aneg(phydev);+}++dev_info(&phydev- >mdio.dev, "Copper Mode");++priv- >lastmode = RTL8211F_MODE_COPPER;++return genphy_config_aneg(phydev);+}++static int rtl8211f_read_status(struct phy_device *phydev)+{+int ret;+struct rtl8211f_priv *priv = phydev- >priv;++if(rtl8211f_mode(phydev) != priv- >lastmode) {+ret = rtl8211f_config_aneg(phydev);+if(ret < 0)+return ret;++ret = genphy_restart_aneg(phydev);+if(ret < 0)+return ret;+}++if (rtl8211f_mode(phydev) == RTL8211FS_MODE_FIBER)+return genphy_c37_read_status(phydev);++return genphy_read_status(phydev);+}++ static struct phy_driver realtek_drvs[] = { { PHY_ID_MATCH_EXACT(0x00008201),@@ -632,10 +722,15 @@ static struct phy_driver realtek_drvs[] = { .write_page= rtl821x_write_page, }, { PHY_ID_MATCH_EXACT(0x001cc916),-.name= "RTL8211F Gigabit Ethernet",+// .name= "RTL8211F Gigabit Ethernet",+.name= "RTL8211F(S) Gigabit Ethernet",+.probe= rtl8211f_probe,+.remove= rtl8211f_remove, .config_init= &rtl8211f_config_init, .ack_interrupt= &rtl8211f_ack_interrupt, .config_intr= &rtl8211f_config_intr,+.config_aneg= rtl8211f_config_aneg,+.read_status= rtl8211f_read_status, .suspend= genphy_suspend, .resume= rtl821x_resume, .read_page= rtl821x_read_page,将补丁加进去
上电之后再复位reset脚一次可以识别到光口了
3.1.7 phy reset
io -4 0xFEC40000 0x80000000 拉低
sleep 0.1
io -4 0xFEC40000 0x80008000 拉高
RTL8211F(S) Gigabit Ethernet stmmac-1:01: Copper Mode
总结
RTL8211FS，只要硬件线路配置为RGMII to Fiber 等涉及到Fiber的模式，即可工作。Fiber相关的模式设定可参考RTL8211FS数据手册中寄存器描述，公司推动 realtek 跟进解决。
审核编辑：汤梓红
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