From 8efaa653a8a540c2cc4b3a7bb4459ec5ea27f1fd Mon Sep 17 00:00:00 2001 From: =?utf8?q?Ren=C3=A9=20van=20Dorst?= Date: Thu, 20 Jun 2019 14:21:54 +0200 Subject: [PATCH] net: ethernet: mediatek: Add MT7621 TRGMII mode support MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit MT7621 SOC also supports TRGMII. TRGMII speed is 1200MBit. Signed-off-by: René van Dorst Signed-off-by: David S. Miller --- drivers/net/ethernet/mediatek/mtk_eth_soc.c | 38 ++++++++++++++++++--- drivers/net/ethernet/mediatek/mtk_eth_soc.h | 11 ++++++ 2 files changed, 45 insertions(+), 4 deletions(-) diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.c b/drivers/net/ethernet/mediatek/mtk_eth_soc.c index f27efe4110cc..066712f2e985 100644 --- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c +++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c @@ -134,6 +134,28 @@ static int mtk_mdio_read(struct mii_bus *bus, int phy_addr, int phy_reg) return _mtk_mdio_read(eth, phy_addr, phy_reg); } +static int mt7621_gmac0_rgmii_adjust(struct mtk_eth *eth, + phy_interface_t interface) +{ + u32 val; + + /* Check DDR memory type. Currently DDR2 is not supported. */ + regmap_read(eth->ethsys, ETHSYS_SYSCFG, &val); + if (val & SYSCFG_DRAM_TYPE_DDR2) { + dev_err(eth->dev, + "TRGMII mode with DDR2 memory is not supported!\n"); + return -EOPNOTSUPP; + } + + val = (interface == PHY_INTERFACE_MODE_TRGMII) ? + ETHSYS_TRGMII_MT7621_DDR_PLL : 0; + + regmap_update_bits(eth->ethsys, ETHSYS_CLKCFG0, + ETHSYS_TRGMII_MT7621_MASK, val); + + return 0; +} + static void mtk_gmac0_rgmii_adjust(struct mtk_eth *eth, int speed) { u32 val; @@ -183,9 +205,17 @@ static void mtk_phy_link_adjust(struct net_device *dev) break; } - if (MTK_HAS_CAPS(mac->hw->soc->caps, MTK_GMAC1_TRGMII) && - !mac->id && !mac->trgmii) - mtk_gmac0_rgmii_adjust(mac->hw, dev->phydev->speed); + if (MTK_HAS_CAPS(mac->hw->soc->caps, MTK_GMAC1_TRGMII) && !mac->id) { + if (MTK_HAS_CAPS(mac->hw->soc->caps, MTK_TRGMII_MT7621_CLK)) { + if (mt7621_gmac0_rgmii_adjust(mac->hw, + dev->phydev->interface)) + return; + } else { + if (!mac->trgmii) + mtk_gmac0_rgmii_adjust(mac->hw, + dev->phydev->speed); + } + } if (dev->phydev->link) mcr |= MAC_MCR_FORCE_LINK; @@ -2607,7 +2637,7 @@ static const struct mtk_soc_data mt2701_data = { }; static const struct mtk_soc_data mt7621_data = { - .caps = MTK_SHARED_INT, + .caps = MT7621_CAPS, .required_clks = MT7621_CLKS_BITMAP, .required_pctl = false, }; diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.h b/drivers/net/ethernet/mediatek/mtk_eth_soc.h index 85e3144f1af5..876ce6798709 100644 --- a/drivers/net/ethernet/mediatek/mtk_eth_soc.h +++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.h @@ -363,6 +363,10 @@ #define MT7622_ETH 7622 #define MT7621_ETH 7621 +/* ethernet system control register */ +#define ETHSYS_SYSCFG 0x10 +#define SYSCFG_DRAM_TYPE_DDR2 BIT(4) + /* ethernet subsystem config register */ #define ETHSYS_SYSCFG0 0x14 #define SYSCFG0_GE_MASK 0x3 @@ -377,6 +381,9 @@ /* ethernet subsystem clock register */ #define ETHSYS_CLKCFG0 0x2c #define ETHSYS_TRGMII_CLK_SEL362_5 BIT(11) +#define ETHSYS_TRGMII_MT7621_MASK (BIT(5) | BIT(6)) +#define ETHSYS_TRGMII_MT7621_APLL BIT(6) +#define ETHSYS_TRGMII_MT7621_DDR_PLL BIT(5) /* ethernet reset control register */ #define ETHSYS_RSTCTRL 0x34 @@ -616,6 +623,7 @@ enum mtk_eth_path { #define MTK_SHARED_SGMII BIT(7) #define MTK_HWLRO BIT(8) #define MTK_SHARED_INT BIT(9) +#define MTK_TRGMII_MT7621_CLK BIT(10) /* Supported path present on SoCs */ #define MTK_PATH_BIT(x) BIT((x) + 10) @@ -667,6 +675,9 @@ enum mtk_eth_path { #define MTK_HAS_CAPS(caps, _x) (((caps) & (_x)) == (_x)) +#define MT7621_CAPS (MTK_GMAC1_RGMII | MTK_GMAC1_TRGMII | \ + MTK_GMAC2_RGMII | MTK_SHARED_INT | MTK_TRGMII_MT7621_CLK) + #define MT7622_CAPS (MTK_GMAC1_RGMII | MTK_GMAC1_SGMII | MTK_GMAC2_RGMII | \ MTK_GMAC2_SGMII | MTK_GDM1_ESW | \ MTK_MUX_GDM1_TO_GMAC1_ESW | \ -- 2.30.2