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From 542d455466bdf32e1bb70230ebcdefd8ed09643b Mon Sep 17 00:00:00 2001
From: Weijie Gao <weijie.gao@mediatek.com>
Date: Wed, 19 Jul 2023 17:17:22 +0800
Subject: [PATCH 22/29] net: mediatek: add support for GMAC/USB3 PHY mux mode
for MT7981
MT7981 has its GMAC2 PHY shared with USB3. To enable GMAC2, mux
register must be set to connect the SGMII phy to GMAC2.
Signed-off-by: Weijie Gao <weijie.gao@mediatek.com>
---
drivers/net/mtk_eth.c | 33 ++++++++++++++++++++++++++++++++-
drivers/net/mtk_eth.h | 16 ++++++++++++++++
2 files changed, 48 insertions(+), 1 deletion(-)
--- a/drivers/net/mtk_eth.c
+++ b/drivers/net/mtk_eth.c
@@ -103,6 +103,8 @@ struct mtk_eth_priv {
struct regmap *ethsys_regmap;
+ struct regmap *infra_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);
@@ -186,6 +188,17 @@ static void mtk_ethsys_rmw(struct mtk_et
regmap_write(priv->ethsys_regmap, reg, val);
}
+static void mtk_infra_rmw(struct mtk_eth_priv *priv, u32 reg, u32 clr,
+ u32 set)
+{
+ uint val;
+
+ regmap_read(priv->infra_regmap, reg, &val);
+ val &= ~clr;
+ val |= set;
+ regmap_write(priv->infra_regmap, reg, val);
+}
+
/* Direct MDIO clause 22/45 access via SoC */
static int mtk_mii_rw(struct mtk_eth_priv *priv, u8 phy, u8 reg, u16 data,
u32 cmd, u32 st)
@@ -1139,6 +1152,11 @@ static void mtk_mac_init(struct mtk_eth_
break;
case PHY_INTERFACE_MODE_SGMII:
case PHY_INTERFACE_MODE_2500BASEX:
+ if (MTK_HAS_CAPS(priv->soc->caps, MTK_GMAC2_U3_QPHY)) {
+ mtk_infra_rmw(priv, USB_PHY_SWITCH_REG, QPHY_SEL_MASK,
+ SGMII_QPHY_SEL);
+ }
+
ge_mode = GE_MODE_RGMII;
mtk_ethsys_rmw(priv, ETHSYS_SYSCFG0_REG, SYSCFG0_SGMII_SEL_M,
SYSCFG0_SGMII_SEL(priv->gmac_id));
@@ -1497,6 +1515,19 @@ static int mtk_eth_of_to_plat(struct ude
if (IS_ERR(priv->ethsys_regmap))
return PTR_ERR(priv->ethsys_regmap);
+ if (MTK_HAS_CAPS(priv->soc->caps, MTK_INFRA)) {
+ /* get corresponding infracfg phandle */
+ ret = dev_read_phandle_with_args(dev, "mediatek,infracfg",
+ NULL, 0, 0, &args);
+
+ if (ret)
+ return ret;
+
+ priv->infra_regmap = syscon_node_to_regmap(args.node);
+ if (IS_ERR(priv->infra_regmap))
+ return PTR_ERR(priv->infra_regmap);
+ }
+
/* Reset controllers */
ret = reset_get_by_name(dev, "fe", &priv->rst_fe);
if (ret) {
@@ -1614,7 +1645,7 @@ static const struct mtk_soc_data mt7986_
};
static const struct mtk_soc_data mt7981_data = {
- .caps = MT7986_CAPS,
+ .caps = MT7981_CAPS,
.ana_rgc3 = 0x128,
.pdma_base = PDMA_V2_BASE,
.txd_size = sizeof(struct mtk_tx_dma_v2),
--- a/drivers/net/mtk_eth.h
+++ b/drivers/net/mtk_eth.h
@@ -15,27 +15,38 @@
enum mkt_eth_capabilities {
MTK_TRGMII_BIT,
MTK_TRGMII_MT7621_CLK_BIT,
+ MTK_U3_COPHY_V2_BIT,
+ MTK_INFRA_BIT,
MTK_NETSYS_V2_BIT,
/* PATH BITS */
MTK_ETH_PATH_GMAC1_TRGMII_BIT,
+ MTK_ETH_PATH_GMAC2_SGMII_BIT,
};
#define MTK_TRGMII BIT(MTK_TRGMII_BIT)
#define MTK_TRGMII_MT7621_CLK BIT(MTK_TRGMII_MT7621_CLK_BIT)
+#define MTK_U3_COPHY_V2 BIT(MTK_U3_COPHY_V2_BIT)
+#define MTK_INFRA BIT(MTK_INFRA_BIT)
#define MTK_NETSYS_V2 BIT(MTK_NETSYS_V2_BIT)
/* Supported path present on SoCs */
#define MTK_ETH_PATH_GMAC1_TRGMII BIT(MTK_ETH_PATH_GMAC1_TRGMII_BIT)
+#define MTK_ETH_PATH_GMAC2_SGMII BIT(MTK_ETH_PATH_GMAC2_SGMII_BIT)
+
#define MTK_GMAC1_TRGMII (MTK_ETH_PATH_GMAC1_TRGMII | MTK_TRGMII)
+#define MTK_GMAC2_U3_QPHY (MTK_ETH_PATH_GMAC2_SGMII | MTK_U3_COPHY_V2 | MTK_INFRA)
+
#define MTK_HAS_CAPS(caps, _x) (((caps) & (_x)) == (_x))
#define MT7621_CAPS (MTK_GMAC1_TRGMII | MTK_TRGMII_MT7621_CLK)
#define MT7623_CAPS (MTK_GMAC1_TRGMII)
+#define MT7981_CAPS (MTK_GMAC2_U3_QPHY | MTK_NETSYS_V2)
+
#define MT7986_CAPS (MTK_NETSYS_V2)
/* Frame Engine Register Bases */
@@ -56,6 +67,11 @@ enum mkt_eth_capabilities {
#define ETHSYS_CLKCFG0_REG 0x2c
#define ETHSYS_TRGMII_CLK_SEL362_5 BIT(11)
+/* Top misc registers */
+#define USB_PHY_SWITCH_REG 0x218
+#define QPHY_SEL_MASK 0x3
+#define SGMII_QPHY_SEL 0x2
+
/* SYSCFG0_GE_MODE: GE Modes */
#define GE_MODE_RGMII 0
#define GE_MODE_MII 1
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