[PATCH 05/10] net: mediatek: fix sgmii selection for mt7622

[Weijie Gao]

Unlike other platforms, mt7622 has only one SGMII and it can be
attached to either gmac1 or gmac2. So the register field of the
sgmii selection differs from other platforms as newer platforms can
control each sgmii individually.

This patch adds a new capability for mt7622 to handle this case.

Signed-off-by: Weijie Gao <weijie....@mediatek.com>
---
 drivers/net/mtk_eth.c | 10 ++++++++--
 drivers/net/mtk_eth.h |  8 ++++++--
 2 files changed, 14 insertions(+), 4 deletions(-)

diff --git a/drivers/net/mtk_eth.c b/drivers/net/mtk_eth.c
index b8cb1f64995..592764df3d1 100644
--- a/drivers/net/mtk_eth.c
+++ b/drivers/net/mtk_eth.c
@@ -1434,7 +1434,7 @@ static void mtk_usxgmii_an_init(struct mtk_eth_priv *priv)
 
 static void mtk_mac_init(struct mtk_eth_priv *priv)
 {
-       int i, ge_mode = 0;
+       int i, sgmii_sel_mask = 0, ge_mode = 0;
        u32 mcr;
 
        switch (priv->phy_interface) {
@@ -1450,8 +1450,13 @@ static void mtk_mac_init(struct mtk_eth_priv *priv)
                }
 
                ge_mode = GE_MODE_RGMII;
-               mtk_ethsys_rmw(priv, ETHSYS_SYSCFG1_REG, SYSCFG1_SGMII_SEL_M,
+
+               if (MTK_HAS_CAPS(priv->soc->caps, MTK_ETH_PATH_MT7622_SGMII))
+                       sgmii_sel_mask = SYSCFG1_SGMII_SEL_M;
+
+               mtk_ethsys_rmw(priv, ETHSYS_SYSCFG1_REG, sgmii_sel_mask,
                               SYSCFG1_SGMII_SEL(priv->gmac_id));
+
                if (priv->phy_interface == PHY_INTERFACE_MODE_SGMII)
                        mtk_sgmii_an_init(priv);
                else
@@ -2112,6 +2117,7 @@ static const struct mtk_soc_data mt7623_data = {
 };
 
 static const struct mtk_soc_data mt7622_data = {
+       .caps = MT7622_CAPS,
        .ana_rgc3 = 0x2028,
        .gdma_count = 2,
        .pdma_base = PDMA_V1_BASE,
diff --git a/drivers/net/mtk_eth.h b/drivers/net/mtk_eth.h
index 896dd6636c7..ad079b5263b 100644
--- a/drivers/net/mtk_eth.h
+++ b/drivers/net/mtk_eth.h
@@ -23,6 +23,7 @@ enum mkt_eth_capabilities {
        /* PATH BITS */
        MTK_ETH_PATH_GMAC1_TRGMII_BIT,
        MTK_ETH_PATH_GMAC2_SGMII_BIT,
+       MTK_ETH_PATH_MT7622_SGMII_BIT,
 };
 
 #define MTK_TRGMII                     BIT(MTK_TRGMII_BIT)
@@ -36,6 +37,7 @@ enum mkt_eth_capabilities {
 #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_ETH_PATH_MT7622_SGMII      BIT(MTK_ETH_PATH_MT7622_SGMII_BIT)
 
 #define MTK_GMAC1_TRGMII       (MTK_ETH_PATH_GMAC1_TRGMII | MTK_TRGMII)
 
@@ -45,6 +47,8 @@ enum mkt_eth_capabilities {
 
 #define MT7621_CAPS  (MTK_GMAC1_TRGMII | MTK_TRGMII_MT7621_CLK)
 
+#define MT7622_CAPS  (MTK_ETH_PATH_MT7622_SGMII)
+
 #define MT7623_CAPS  (MTK_GMAC1_TRGMII)
 
 #define MT7981_CAPS  (MTK_GMAC2_U3_QPHY | MTK_NETSYS_V2)
@@ -68,8 +72,8 @@ enum mkt_eth_capabilities {
 #define ETHSYS_SYSCFG1_REG             0x14
 #define SYSCFG1_GE_MODE_S(n)           (12 + ((n) * 2))
 #define SYSCFG1_GE_MODE_M              0x3
-#define SYSCFG1_SGMII_SEL_M            (0x3 << 8)
-#define SYSCFG1_SGMII_SEL(gmac)                ((!(gmac)) ? BIT(9) : BIT(8))
+#define SYSCFG1_SGMII_SEL_M            GENMASK(9, 8)
+#define SYSCFG1_SGMII_SEL(gmac)                BIT(9 - (gmac))
 
 #define ETHSYS_CLKCFG0_REG             0x2c
 #define ETHSYS_TRGMII_CLK_SEL362_5     BIT(11)
-- 
2.34.1