realtek phy 8211fs相关配置(phy芯片更改)

realtek 8211fs phy芯片更改

穷也不能穷山东

4228人浏览 · 2022-08-17 17:21:33

穷也不能穷山东 · 2022-08-17 17:21:33 发布

最近有需求进行phy芯片更改，因此对phy芯片进行了一部分研究配置做个记录，其实主要还是得参考github上的开源kernel，有些人找不到我就告诉你一个路径，其实随便哪家的kernel应该某些驱动都差不多。GitHub - rockchip-toybrick/kernel

boot：

/* RTL8211F PHY Status Register */
#define MIIM_RTL8211F_PHY_STATUS 0x1a
#define MIIM_RTL8211F_AUTONEG_ENABLE 0x1000
#define MIIM_RTL8211F_PHYSTAT_SPEED 0x0030
#define MIIM_RTL8211F_PHYSTAT_GBIT 0x0020
#define MIIM_RTL8211F_PHYSTAT_100 0x0010
#define MIIM_RTL8211F_PHYSTAT_DUPLEX 0x0008
#define MIIM_RTL8211F_PHYSTAT_SPDDONE 0x0800
#define MIIM_RTL8211F_PHYSTAT_LINK 0x0004

#define MIIM_RTL8211F_PAGE_SELECT 0x1f
#define MIIM_RTL8211F_TX_DELAY 0x100
#define MIIM_RTL8211F_LCR 0x10

static int rtl8211f_config(struct phy_device *phydev)
{
u16 reg;

phy_write(phydev, MDIO_DEVAD_NONE, MII_BMCR, BMCR_RESET);

   if (phydev->interface == PHY_INTERFACE_MODE_RGMII) {
       /* enable TXDLY */
       phy_write(phydev, MDIO_DEVAD_NONE,
           MIIM_RTL8211F_PAGE_SELECT, 0xd08);
       reg = phy_read(phydev, MDIO_DEVAD_NONE, 0x11);
       reg |= MIIM_RTL8211F_TX_DELAY;
       phy_write(phydev, MDIO_DEVAD_NONE, 0x11, reg);
       /* restore to default page 0 */
       phy_write(phydev, MDIO_DEVAD_NONE,
           MIIM_RTL8211F_PAGE_SELECT, 0x0);
   }

   /* Set green LED for Link, yellow LED for Active */
   phy_write(phydev, MDIO_DEVAD_NONE,
       MIIM_RTL8211F_PAGE_SELECT, 0xd04);
   phy_write(phydev, MDIO_DEVAD_NONE, 0x10, 0x617f);
   phy_write(phydev, MDIO_DEVAD_NONE,
       MIIM_RTL8211F_PAGE_SELECT, 0x0);

genphy_config_aneg(phydev);

return 0;
}

static int rtl8211f_parse_status(struct phy_device *phydev)
{
   unsigned int speed;
   unsigned int mii_reg;
   int i = 0;

phy_write(phydev, MDIO_DEVAD_NONE, MIIM_RTL8211F_PAGE_SELECT, 0xa43);
mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MIIM_RTL8211F_PHY_STATUS);

   phydev->link = 1;
   while (!(mii_reg & MIIM_RTL8211F_PHYSTAT_LINK)) {
       if (i > PHY_AUTONEGOTIATE_TIMEOUT) {
           puts(" TIMEOUT !\n");
           phydev->link = 0;
           break;
       }

       if ((i++ % 1000) == 0)
           putc('.');
       udelay(1000);
       mii_reg = phy_read(phydev, MDIO_DEVAD_NONE,
               MIIM_RTL8211F_PHY_STATUS);
   }

   if (mii_reg & MIIM_RTL8211F_PHYSTAT_DUPLEX)
       phydev->duplex = DUPLEX_FULL;
   else
       phydev->duplex = DUPLEX_HALF;

speed = (mii_reg & MIIM_RTL8211F_PHYSTAT_SPEED);

   switch (speed) {
   case MIIM_RTL8211F_PHYSTAT_GBIT:
       phydev->speed = SPEED_1000;
       break;
   case MIIM_RTL8211F_PHYSTAT_100:
       phydev->speed = SPEED_100;
       break;
   default:
       phydev->speed = SPEED_10;
   }

return 0;
}

static int rtl8211f_startup(struct phy_device *phydev)
{
   /* Read the Status (2x to make sure link is right) */
   genphy_update_link(phydev);
   rtl8211f_parse_status(phydev);

return 0;
}

/* Support for RTL8211F PHY */
static struct phy_driver RTL8211F_driver = {
   .name = "RealTek RTL8211F",
   .uid = 0x1cc916,
   .mask = 0xffffff,
   .features = PHY_GBIT_FEATURES,
   .config = &rtl8211f_config,
   .startup = &rtl8211f_startup,
   .shutdown = &genphy_shutdown,
};

更改phy芯片主要涉及mdio地址问题，电压电容问题，目前已解决，后续还根据芯片手册进行了一些微调就没有再补充了，主要是网口灯闪烁有点毛病，也不知道是我们那硬件工程师的问题还是哪的问题没管了凑合用。