net: mediatek: add USXGMII support

This patch adds support for USXGMII of SoC.

Signed-off-by: Weijie Gao <weijie.gao@mediatek.com>

diff --git a/drivers/net/mtk_eth.c b/drivers/net/mtk_eth.c
index 064b4a4..c99ab5d 100644 (file)
--- a/drivers/net/mtk_eth.c
+++ b/drivers/net/mtk_eth.c
@@ -105,6 +105,11 @@ struct mtk_eth_priv {
 
        struct regmap *infra_regmap;
 
+       struct regmap *usxgmii_regmap;
+       struct regmap *xfi_pextp_regmap;
+       struct regmap *xfi_pll_regmap;
+       struct regmap *toprgu_regmap;
+
        struct mii_dev *mdio_bus;
        int (*mii_read)(struct mtk_eth_priv *priv, u8 phy, u8 reg);
        int (*mii_write)(struct mtk_eth_priv *priv, u8 phy, u8 reg, u16 val);
@@ -989,6 +994,42 @@ static int mt753x_switch_init(struct mtk_eth_priv *priv)
        return 0;
 }
 
+static void mtk_xphy_link_adjust(struct mtk_eth_priv *priv)
+{
+       u16 lcl_adv = 0, rmt_adv = 0;
+       u8 flowctrl;
+       u32 mcr;
+
+       mcr = mtk_gmac_read(priv, XGMAC_PORT_MCR(priv->gmac_id));
+       mcr &= ~(XGMAC_FORCE_TX_FC | XGMAC_FORCE_RX_FC);
+
+       if (priv->phydev->duplex) {
+               if (priv->phydev->pause)
+                       rmt_adv = LPA_PAUSE_CAP;
+               if (priv->phydev->asym_pause)
+                       rmt_adv |= LPA_PAUSE_ASYM;
+
+               if (priv->phydev->advertising & ADVERTISED_Pause)
+                       lcl_adv |= ADVERTISE_PAUSE_CAP;
+               if (priv->phydev->advertising & ADVERTISED_Asym_Pause)
+                       lcl_adv |= ADVERTISE_PAUSE_ASYM;
+
+               flowctrl = mii_resolve_flowctrl_fdx(lcl_adv, rmt_adv);
+
+               if (flowctrl & FLOW_CTRL_TX)
+                       mcr |= XGMAC_FORCE_TX_FC;
+               if (flowctrl & FLOW_CTRL_RX)
+                       mcr |= XGMAC_FORCE_RX_FC;
+
+               debug("rx pause %s, tx pause %s\n",
+                     flowctrl & FLOW_CTRL_RX ? "enabled" : "disabled",
+                     flowctrl & FLOW_CTRL_TX ? "enabled" : "disabled");
+       }
+
+       mcr &= ~(XGMAC_TRX_DISABLE);
+       mtk_gmac_write(priv, XGMAC_PORT_MCR(priv->gmac_id), mcr);
+}
+
 static void mtk_phy_link_adjust(struct mtk_eth_priv *priv)
 {
        u16 lcl_adv = 0, rmt_adv = 0;
@@ -1063,8 +1104,12 @@ static int mtk_phy_start(struct mtk_eth_priv *priv)
                return 0;
        }
 
-       if (!priv->force_mode)
-               mtk_phy_link_adjust(priv);
+       if (!priv->force_mode) {
+               if (priv->phy_interface == PHY_INTERFACE_MODE_USXGMII)
+                       mtk_xphy_link_adjust(priv);
+               else
+                       mtk_phy_link_adjust(priv);
+       }
 
        debug("Speed: %d, %s duplex%s\n", phydev->speed,
              (phydev->duplex) ? "full" : "half",
@@ -1140,6 +1185,112 @@ static void mtk_sgmii_force_init(struct mtk_eth_priv *priv)
                        SGMII_PHYA_PWD, 0);
 }
 
+static void mtk_xfi_pll_enable(struct mtk_eth_priv *priv)
+{
+       u32 val = 0;
+
+       /* Add software workaround for USXGMII PLL TCL issue */
+       regmap_write(priv->xfi_pll_regmap, XFI_PLL_ANA_GLB8,
+                    RG_XFI_PLL_ANA_SWWA);
+
+       regmap_read(priv->xfi_pll_regmap, XFI_PLL_DIG_GLB8, &val);
+       val |= RG_XFI_PLL_EN;
+       regmap_write(priv->xfi_pll_regmap, XFI_PLL_DIG_GLB8, val);
+}
+
+static void mtk_usxgmii_reset(struct mtk_eth_priv *priv)
+{
+       switch (priv->gmac_id) {
+       case 1:
+               regmap_write(priv->toprgu_regmap, 0xFC, 0x0000A004);
+               regmap_write(priv->toprgu_regmap, 0x18, 0x88F0A004);
+               regmap_write(priv->toprgu_regmap, 0xFC, 0x00000000);
+               regmap_write(priv->toprgu_regmap, 0x18, 0x88F00000);
+               regmap_write(priv->toprgu_regmap, 0x18, 0x00F00000);
+               break;
+       case 2:
+               regmap_write(priv->toprgu_regmap, 0xFC, 0x00005002);
+               regmap_write(priv->toprgu_regmap, 0x18, 0x88F05002);
+               regmap_write(priv->toprgu_regmap, 0xFC, 0x00000000);
+               regmap_write(priv->toprgu_regmap, 0x18, 0x88F00000);
+               regmap_write(priv->toprgu_regmap, 0x18, 0x00F00000);
+               break;
+       }
+
+       mdelay(10);
+}
+
+static void mtk_usxgmii_setup_phya_an_10000(struct mtk_eth_priv *priv)
+{
+       regmap_write(priv->usxgmii_regmap, 0x810, 0x000FFE6D);
+       regmap_write(priv->usxgmii_regmap, 0x818, 0x07B1EC7B);
+       regmap_write(priv->usxgmii_regmap, 0x80C, 0x30000000);
+       ndelay(1020);
+       regmap_write(priv->usxgmii_regmap, 0x80C, 0x10000000);
+       ndelay(1020);
+       regmap_write(priv->usxgmii_regmap, 0x80C, 0x00000000);
+
+       regmap_write(priv->xfi_pextp_regmap, 0x9024, 0x00C9071C);
+       regmap_write(priv->xfi_pextp_regmap, 0x2020, 0xAA8585AA);
+       regmap_write(priv->xfi_pextp_regmap, 0x2030, 0x0C020707);
+       regmap_write(priv->xfi_pextp_regmap, 0x2034, 0x0E050F0F);
+       regmap_write(priv->xfi_pextp_regmap, 0x2040, 0x00140032);
+       regmap_write(priv->xfi_pextp_regmap, 0x50F0, 0x00C014AA);
+       regmap_write(priv->xfi_pextp_regmap, 0x50E0, 0x3777C12B);
+       regmap_write(priv->xfi_pextp_regmap, 0x506C, 0x005F9CFF);
+       regmap_write(priv->xfi_pextp_regmap, 0x5070, 0x9D9DFAFA);
+       regmap_write(priv->xfi_pextp_regmap, 0x5074, 0x27273F3F);
+       regmap_write(priv->xfi_pextp_regmap, 0x5078, 0xA7883C68);
+       regmap_write(priv->xfi_pextp_regmap, 0x507C, 0x11661166);
+       regmap_write(priv->xfi_pextp_regmap, 0x5080, 0x0E000AAF);
+       regmap_write(priv->xfi_pextp_regmap, 0x5084, 0x08080D0D);
+       regmap_write(priv->xfi_pextp_regmap, 0x5088, 0x02030909);
+       regmap_write(priv->xfi_pextp_regmap, 0x50E4, 0x0C0C0000);
+       regmap_write(priv->xfi_pextp_regmap, 0x50E8, 0x04040000);
+       regmap_write(priv->xfi_pextp_regmap, 0x50EC, 0x0F0F0C06);
+       regmap_write(priv->xfi_pextp_regmap, 0x50A8, 0x506E8C8C);
+       regmap_write(priv->xfi_pextp_regmap, 0x6004, 0x18190000);
+       regmap_write(priv->xfi_pextp_regmap, 0x00F8, 0x01423342);
+       regmap_write(priv->xfi_pextp_regmap, 0x00F4, 0x80201F20);
+       regmap_write(priv->xfi_pextp_regmap, 0x0030, 0x00050C00);
+       regmap_write(priv->xfi_pextp_regmap, 0x0070, 0x02002800);
+       ndelay(1020);
+       regmap_write(priv->xfi_pextp_regmap, 0x30B0, 0x00000020);
+       regmap_write(priv->xfi_pextp_regmap, 0x3028, 0x00008A01);
+       regmap_write(priv->xfi_pextp_regmap, 0x302C, 0x0000A884);
+       regmap_write(priv->xfi_pextp_regmap, 0x3024, 0x00083002);
+       regmap_write(priv->xfi_pextp_regmap, 0x3010, 0x00022220);
+       regmap_write(priv->xfi_pextp_regmap, 0x5064, 0x0F020A01);
+       regmap_write(priv->xfi_pextp_regmap, 0x50B4, 0x06100600);
+       regmap_write(priv->xfi_pextp_regmap, 0x3048, 0x40704000);
+       regmap_write(priv->xfi_pextp_regmap, 0x3050, 0xA8000000);
+       regmap_write(priv->xfi_pextp_regmap, 0x3054, 0x000000AA);
+       regmap_write(priv->xfi_pextp_regmap, 0x306C, 0x00000F00);
+       regmap_write(priv->xfi_pextp_regmap, 0xA060, 0x00040000);
+       regmap_write(priv->xfi_pextp_regmap, 0x90D0, 0x00000001);
+       regmap_write(priv->xfi_pextp_regmap, 0x0070, 0x0200E800);
+       udelay(150);
+       regmap_write(priv->xfi_pextp_regmap, 0x0070, 0x0200C111);
+       ndelay(1020);
+       regmap_write(priv->xfi_pextp_regmap, 0x0070, 0x0200C101);
+       udelay(15);
+       regmap_write(priv->xfi_pextp_regmap, 0x0070, 0x0202C111);
+       ndelay(1020);
+       regmap_write(priv->xfi_pextp_regmap, 0x0070, 0x0202C101);
+       udelay(100);
+       regmap_write(priv->xfi_pextp_regmap, 0x30B0, 0x00000030);
+       regmap_write(priv->xfi_pextp_regmap, 0x00F4, 0x80201F00);
+       regmap_write(priv->xfi_pextp_regmap, 0x3040, 0x30000000);
+       udelay(400);
+}
+
+static void mtk_usxgmii_an_init(struct mtk_eth_priv *priv)
+{
+       mtk_xfi_pll_enable(priv);
+       mtk_usxgmii_reset(priv);
+       mtk_usxgmii_setup_phya_an_10000(priv);
+}
+
 static void mtk_mac_init(struct mtk_eth_priv *priv)
 {
        int i, ge_mode = 0;
@@ -1222,6 +1373,36 @@ static void mtk_mac_init(struct mtk_eth_priv *priv)
        }
 }
 
+static void mtk_xmac_init(struct mtk_eth_priv *priv)
+{
+       u32 sts;
+
+       switch (priv->phy_interface) {
+       case PHY_INTERFACE_MODE_USXGMII:
+               mtk_usxgmii_an_init(priv);
+               break;
+       default:
+               break;
+       }
+
+       /* Set GMAC to the correct mode */
+       mtk_ethsys_rmw(priv, ETHSYS_SYSCFG0_REG,
+                      SYSCFG0_GE_MODE_M << SYSCFG0_GE_MODE_S(priv->gmac_id),
+                      0);
+
+       if (priv->gmac_id == 1) {
+               mtk_infra_rmw(priv, TOPMISC_NETSYS_PCS_MUX,
+                             NETSYS_PCS_MUX_MASK, MUX_G2_USXGMII_SEL);
+       } else if (priv->gmac_id == 2) {
+               sts = mtk_gmac_read(priv, XGMAC_STS(priv->gmac_id));
+               sts |= XGMAC_FORCE_LINK;
+               mtk_gmac_write(priv, XGMAC_STS(priv->gmac_id), sts);
+       }
+
+       /* Force GMAC link down */
+       mtk_gmac_write(priv, GMAC_PORT_MCR(priv->gmac_id), FORCE_MODE);
+}
+
 static void mtk_eth_fifo_init(struct mtk_eth_priv *priv)
 {
        char *pkt_base = priv->pkt_pool;
@@ -1463,7 +1644,10 @@ static int mtk_eth_probe(struct udevice *dev)
                                ARCH_DMA_MINALIGN);
 
        /* Set MAC mode */
-       mtk_mac_init(priv);
+       if (priv->phy_interface == PHY_INTERFACE_MODE_USXGMII)
+               mtk_xmac_init(priv);
+       else
+               mtk_mac_init(priv);
 
        /* Probe phy if switch is not specified */
        if (priv->sw == SW_NONE)
@@ -1581,6 +1765,46 @@ static int mtk_eth_of_to_plat(struct udevice *dev)
                }
 
                priv->pn_swap = ofnode_read_bool(args.node, "pn_swap");
+       } else if (priv->phy_interface == PHY_INTERFACE_MODE_USXGMII) {
+               /* get corresponding usxgmii phandle */
+               ret = dev_read_phandle_with_args(dev, "mediatek,usxgmiisys",
+                                                NULL, 0, 0, &args);
+               if (ret)
+                       return ret;
+
+               priv->usxgmii_regmap = syscon_node_to_regmap(args.node);
+               if (IS_ERR(priv->usxgmii_regmap))
+                       return PTR_ERR(priv->usxgmii_regmap);
+
+               /* get corresponding xfi_pextp phandle */
+               ret = dev_read_phandle_with_args(dev, "mediatek,xfi_pextp",
+                                                NULL, 0, 0, &args);
+               if (ret)
+                       return ret;
+
+               priv->xfi_pextp_regmap = syscon_node_to_regmap(args.node);
+               if (IS_ERR(priv->xfi_pextp_regmap))
+                       return PTR_ERR(priv->xfi_pextp_regmap);
+
+               /* get corresponding xfi_pll phandle */
+               ret = dev_read_phandle_with_args(dev, "mediatek,xfi_pll",
+                                                NULL, 0, 0, &args);
+               if (ret)
+                       return ret;
+
+               priv->xfi_pll_regmap = syscon_node_to_regmap(args.node);
+               if (IS_ERR(priv->xfi_pll_regmap))
+                       return PTR_ERR(priv->xfi_pll_regmap);
+
+               /* get corresponding toprgu phandle */
+               ret = dev_read_phandle_with_args(dev, "mediatek,toprgu",
+                                                NULL, 0, 0, &args);
+               if (ret)
+                       return ret;
+
+               priv->toprgu_regmap = syscon_node_to_regmap(args.node);
+               if (IS_ERR(priv->toprgu_regmap))
+                       return PTR_ERR(priv->toprgu_regmap);
        }
 
        /* check for switch first, otherwise phy will be used */

diff --git a/drivers/net/mtk_eth.h b/drivers/net/mtk_eth.h
index 519986c..4c2a7a8 100644 (file)
--- a/drivers/net/mtk_eth.h
+++ b/drivers/net/mtk_eth.h
@@ -68,6 +68,11 @@ enum mkt_eth_capabilities {
 #define ETHSYS_TRGMII_CLK_SEL362_5     BIT(11)
 
 /* Top misc registers */
+#define TOPMISC_NETSYS_PCS_MUX         0x84
+#define NETSYS_PCS_MUX_MASK            GENMASK(1, 0)
+#define MUX_G2_USXGMII_SEL             BIT(1)
+#define MUX_HSGMII1_G1_SEL             BIT(0)
+
 #define USB_PHY_SWITCH_REG             0x218
 #define QPHY_SEL_MASK                  0x3
 #define SGMII_QPHY_SEL                 0x2
@@ -98,6 +103,15 @@ enum mkt_eth_capabilities {
 #define SGMSYS_GEN2_SPEED_V2           0x128
 #define SGMSYS_SPEED_2500              BIT(2)
 
+/* USXGMII subsystem config registers */
+/* Register to control USXGMII XFI PLL digital */
+#define XFI_PLL_DIG_GLB8               0x08
+#define RG_XFI_PLL_EN                  BIT(31)
+
+/* Register to control USXGMII XFI PLL analog */
+#define XFI_PLL_ANA_GLB8               0x108
+#define RG_XFI_PLL_ANA_SWWA            0x02283248
+
 /* Frame Engine Registers */
 #define FE_GLO_MISC_REG                        0x124
 #define PDMA_VER_V2                    BIT(4)
@@ -221,6 +235,16 @@ enum mkt_eth_capabilities {
 #define TD_DM_DRVP_S                   0
 #define TD_DM_DRVP_M                   0x0f
 
+/* XGMAC Status Registers */
+#define XGMAC_STS(x)                   (((x) == 2) ? 0x001C : 0x000C)
+#define XGMAC_FORCE_LINK               BIT(15)
+
+/* XGMAC Registers */
+#define XGMAC_PORT_MCR(x)              (0x2000 + (((x) - 1) * 0x1000))
+#define XGMAC_TRX_DISABLE              0xf
+#define XGMAC_FORCE_TX_FC              BIT(5)
+#define XGMAC_FORCE_RX_FC              BIT(4)
+
 /* MT7530 Registers */
 
 #define PCR_REG(p)                     (0x2004 + (p) * 0x100)