drivers/net/ethernet/wangxun/ngbe/ngbe_mdio.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /* Copyright (c) 2019 - 2022 Beijing WangXun Technology Co., Ltd. */
   3
   4 #include <linux/ethtool.h>
   5 #include <linux/iopoll.h>
   6 #include <linux/pci.h>
   7 #include <linux/phy.h>
   8
   9 #include "../libwx/wx_type.h"
  10 #include "../libwx/wx_hw.h"
  11 #include "ngbe_type.h"
  12 #include "ngbe_mdio.h"
  13
  14 static int ngbe_phy_read_reg_internal(struct mii_bus *bus, int phy_addr, int regnum)
  15 {
  16         struct wx *wx = bus->priv;
  17
  18         if (phy_addr != 0)
  19                 return 0xffff;
  20         return (u16)rd32(wx, NGBE_PHY_CONFIG(regnum));
  21 }
  22
  23 static int ngbe_phy_write_reg_internal(struct mii_bus *bus, int phy_addr, int regnum, u16 value)
  24 {
  25         struct wx *wx = bus->priv;
  26
  27         if (phy_addr == 0)
  28                 wr32(wx, NGBE_PHY_CONFIG(regnum), value);
  29         return 0;
  30 }
  31
  32 static int ngbe_phy_read_reg_c22(struct mii_bus *bus, int phy_addr, int regnum)
  33 {
  34         struct wx *wx = bus->priv;
  35         u16 phy_data;
  36
  37         if (wx->mac_type == em_mac_type_mdi)
  38                 phy_data = ngbe_phy_read_reg_internal(bus, phy_addr, regnum);
  39         else
  40                 phy_data = wx_phy_read_reg_mdi_c22(bus, phy_addr, regnum);
  41
  42         return phy_data;
  43 }
  44
  45 static int ngbe_phy_write_reg_c22(struct mii_bus *bus, int phy_addr,
  46                                   int regnum, u16 value)
  47 {
  48         struct wx *wx = bus->priv;
  49         int ret;
  50
  51         if (wx->mac_type == em_mac_type_mdi)
  52                 ret = ngbe_phy_write_reg_internal(bus, phy_addr, regnum, value);
  53         else
  54                 ret = wx_phy_write_reg_mdi_c22(bus, phy_addr, regnum, value);
  55
  56         return ret;
  57 }
  58
  59 static void ngbe_mac_config(struct phylink_config *config, unsigned int mode,
  60                             const struct phylink_link_state *state)
  61 {
  62 }
  63
  64 static void ngbe_mac_link_down(struct phylink_config *config,
  65                                unsigned int mode, phy_interface_t interface)
  66 {
  67 }
  68
  69 static void ngbe_mac_link_up(struct phylink_config *config,
  70                              struct phy_device *phy,
  71                              unsigned int mode, phy_interface_t interface,
  72                              int speed, int duplex,
  73                              bool tx_pause, bool rx_pause)
  74 {
  75         struct wx *wx = phylink_to_wx(config);
  76         u32 lan_speed, reg;
  77
  78         wx_fc_enable(wx, tx_pause, rx_pause);
  79
  80         switch (speed) {
  81         case SPEED_10:
  82                 lan_speed = 0;
  83                 break;
  84         case SPEED_100:
  85                 lan_speed = 1;
  86                 break;
  87         case SPEED_1000:
  88         default:
  89                 lan_speed = 2;
  90                 break;
  91         }
  92
  93         wr32m(wx, NGBE_CFG_LAN_SPEED, 0x3, lan_speed);
  94
  95         reg = rd32(wx, WX_MAC_TX_CFG);
  96         reg &= ~WX_MAC_TX_CFG_SPEED_MASK;
  97         reg |= WX_MAC_TX_CFG_SPEED_1G | WX_MAC_TX_CFG_TE;
  98         wr32(wx, WX_MAC_TX_CFG, reg);
  99
 100         /* Re configure MAC Rx */
 101         reg = rd32(wx, WX_MAC_RX_CFG);
 102         wr32(wx, WX_MAC_RX_CFG, reg);
 103         wr32(wx, WX_MAC_PKT_FLT, WX_MAC_PKT_FLT_PR);
 104         reg = rd32(wx, WX_MAC_WDG_TIMEOUT);
 105         wr32(wx, WX_MAC_WDG_TIMEOUT, reg);
 106 }
 107
 108 static const struct phylink_mac_ops ngbe_mac_ops = {
 109         .mac_config = ngbe_mac_config,
 110         .mac_link_down = ngbe_mac_link_down,
 111         .mac_link_up = ngbe_mac_link_up,
 112 };
 113
 114 static int ngbe_phylink_init(struct wx *wx)
 115 {
 116         struct phylink_config *config;
 117         phy_interface_t phy_mode;
 118         struct phylink *phylink;
 119
 120         config = &wx->phylink_config;
 121         config->dev = &wx->netdev->dev;
 122         config->type = PHYLINK_NETDEV;
 123         config->mac_capabilities = MAC_1000FD | MAC_100FD | MAC_10FD |
 124                                    MAC_SYM_PAUSE | MAC_ASYM_PAUSE;
 125         config->mac_managed_pm = true;
 126
 127         /* The MAC only has add the Tx delay and it can not be modified.
 128          * So just disable TX delay in PHY, and it is does not matter to
 129          * internal phy.
 130          */
 131         phy_mode = PHY_INTERFACE_MODE_RGMII_RXID;
 132         __set_bit(PHY_INTERFACE_MODE_RGMII_RXID, config->supported_interfaces);
 133
 134         phylink = phylink_create(config, NULL, phy_mode, &ngbe_mac_ops);
 135         if (IS_ERR(phylink))
 136                 return PTR_ERR(phylink);
 137
 138         wx->phylink = phylink;
 139
 140         return 0;
 141 }
 142
 143 int ngbe_mdio_init(struct wx *wx)
 144 {
 145         struct pci_dev *pdev = wx->pdev;
 146         struct mii_bus *mii_bus;
 147         int ret;
 148
 149         mii_bus = devm_mdiobus_alloc(&pdev->dev);
 150         if (!mii_bus)
 151                 return -ENOMEM;
 152
 153         mii_bus->name = "ngbe_mii_bus";
 154         mii_bus->read = ngbe_phy_read_reg_c22;
 155         mii_bus->write = ngbe_phy_write_reg_c22;
 156         mii_bus->phy_mask = GENMASK(31, 4);
 157         mii_bus->parent = &pdev->dev;
 158         mii_bus->priv = wx;
 159
 160         if (wx->mac_type == em_mac_type_rgmii) {
 161                 mii_bus->read_c45 = wx_phy_read_reg_mdi_c45;
 162                 mii_bus->write_c45 = wx_phy_write_reg_mdi_c45;
 163         }
 164
 165         snprintf(mii_bus->id, MII_BUS_ID_SIZE, "ngbe-%x", pci_dev_id(pdev));
 166         ret = devm_mdiobus_register(&pdev->dev, mii_bus);
 167         if (ret)
 168                 return ret;
 169
 170         wx->phydev = phy_find_first(mii_bus);
 171         if (!wx->phydev)
 172                 return -ENODEV;
 173
 174         phy_attached_info(wx->phydev);
 175
 176         wx->link = 0;
 177         wx->speed = 0;
 178         wx->duplex = 0;
 179
 180         ret = ngbe_phylink_init(wx);
 181         if (ret) {
 182                 wx_err(wx, "failed to init phylink: %d\n", ret);
 183                 return ret;
 184         }
 185
 186         return 0;
 187 }