From 347b5aa9eb37e103c0a497910ffa0a6452e059d4 Mon Sep 17 00:00:00 2001 From: =?utf8?q?Ren=C3=A9=20van=20Dorst?= Date: Mon, 2 Sep 2019 15:02:26 +0200 Subject: [PATCH] net: dsa: mt7530: Add support for port 5 MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Adding support for port 5. Port 5 can muxed/interface to: - internal 5th GMAC of the switch; can be used as 2nd CPU port or as extra port with an external phy for a 6th ethernet port. - internal PHY of port 0 or 4; Used in most applications so that port 0 or 4 is the WAN port and interfaces with the 2nd GMAC of the SOC. Signed-off-by: René van Dorst Tested-by: Frank Wunderlich Acked-by: Russell King Signed-off-by: David S. Miller --- drivers/net/dsa/mt7530.c | 145 +++++++++++++++++++++++++++++++++++++-- drivers/net/dsa/mt7530.h | 29 ++++++++ 2 files changed, 168 insertions(+), 6 deletions(-) diff --git a/drivers/net/dsa/mt7530.c b/drivers/net/dsa/mt7530.c index ecc13b57e6198..1d8d36de4d20d 100644 --- a/drivers/net/dsa/mt7530.c +++ b/drivers/net/dsa/mt7530.c @@ -633,6 +633,77 @@ mt7530_get_sset_count(struct dsa_switch *ds, int port, int sset) return ARRAY_SIZE(mt7530_mib); } +static void mt7530_setup_port5(struct dsa_switch *ds, phy_interface_t interface) +{ + struct mt7530_priv *priv = ds->priv; + u8 tx_delay = 0; + int val; + + mutex_lock(&priv->reg_mutex); + + val = mt7530_read(priv, MT7530_MHWTRAP); + + val |= MHWTRAP_MANUAL | MHWTRAP_P5_MAC_SEL | MHWTRAP_P5_DIS; + val &= ~MHWTRAP_P5_RGMII_MODE & ~MHWTRAP_PHY0_SEL; + + switch (priv->p5_intf_sel) { + case P5_INTF_SEL_PHY_P0: + /* MT7530_P5_MODE_GPHY_P0: 2nd GMAC -> P5 -> P0 */ + val |= MHWTRAP_PHY0_SEL; + /* fall through */ + case P5_INTF_SEL_PHY_P4: + /* MT7530_P5_MODE_GPHY_P4: 2nd GMAC -> P5 -> P4 */ + val &= ~MHWTRAP_P5_MAC_SEL & ~MHWTRAP_P5_DIS; + + /* Setup the MAC by default for the cpu port */ + mt7530_write(priv, MT7530_PMCR_P(5), 0x56300); + break; + case P5_INTF_SEL_GMAC5: + /* MT7530_P5_MODE_GMAC: P5 -> External phy or 2nd GMAC */ + val &= ~MHWTRAP_P5_DIS; + break; + case P5_DISABLED: + interface = PHY_INTERFACE_MODE_NA; + break; + default: + dev_err(ds->dev, "Unsupported p5_intf_sel %d\n", + priv->p5_intf_sel); + goto unlock_exit; + } + + /* Setup RGMII settings */ + if (phy_interface_mode_is_rgmii(interface)) { + val |= MHWTRAP_P5_RGMII_MODE; + + /* P5 RGMII RX Clock Control: delay setting for 1000M */ + mt7530_write(priv, MT7530_P5RGMIIRXCR, CSR_RGMII_EDGE_ALIGN); + + /* Don't set delay in DSA mode */ + if (!dsa_is_dsa_port(priv->ds, 5) && + (interface == PHY_INTERFACE_MODE_RGMII_TXID || + interface == PHY_INTERFACE_MODE_RGMII_ID)) + tx_delay = 4; /* n * 0.5 ns */ + + /* P5 RGMII TX Clock Control: delay x */ + mt7530_write(priv, MT7530_P5RGMIITXCR, + CSR_RGMII_TXC_CFG(0x10 + tx_delay)); + + /* reduce P5 RGMII Tx driving, 8mA */ + mt7530_write(priv, MT7530_IO_DRV_CR, + P5_IO_CLK_DRV(1) | P5_IO_DATA_DRV(1)); + } + + mt7530_write(priv, MT7530_MHWTRAP, val); + + dev_dbg(ds->dev, "Setup P5, HWTRAP=0x%x, intf_sel=%s, phy-mode=%s\n", + val, p5_intf_modes(priv->p5_intf_sel), phy_modes(interface)); + + priv->p5_interface = interface; + +unlock_exit: + mutex_unlock(&priv->reg_mutex); +} + static int mt7530_cpu_port_enable(struct mt7530_priv *priv, int port) @@ -1169,7 +1240,10 @@ static int mt7530_setup(struct dsa_switch *ds) { struct mt7530_priv *priv = ds->priv; + struct device_node *phy_node; + struct device_node *mac_np; struct mt7530_dummy_poll p; + phy_interface_t interface; struct device_node *dn; u32 id, val; int ret, i; @@ -1260,6 +1334,40 @@ mt7530_setup(struct dsa_switch *ds) mt7530_port_disable(ds, i); } + /* Setup port 5 */ + priv->p5_intf_sel = P5_DISABLED; + interface = PHY_INTERFACE_MODE_NA; + + if (!dsa_is_unused_port(ds, 5)) { + priv->p5_intf_sel = P5_INTF_SEL_GMAC5; + interface = of_get_phy_mode(ds->ports[5].dn); + } else { + /* Scan the ethernet nodes. look for GMAC1, lookup used phy */ + for_each_child_of_node(dn, mac_np) { + if (!of_device_is_compatible(mac_np, + "mediatek,eth-mac")) + continue; + + ret = of_property_read_u32(mac_np, "reg", &id); + if (ret < 0 || id != 1) + continue; + + phy_node = of_parse_phandle(mac_np, "phy-handle", 0); + if (phy_node->parent == priv->dev->of_node->parent) { + interface = of_get_phy_mode(mac_np); + id = of_mdio_parse_addr(ds->dev, phy_node); + if (id == 0) + priv->p5_intf_sel = P5_INTF_SEL_PHY_P0; + if (id == 4) + priv->p5_intf_sel = P5_INTF_SEL_PHY_P4; + } + of_node_put(phy_node); + break; + } + } + + mt7530_setup_port5(ds, interface); + /* Flush the FDB table */ ret = mt7530_fdb_cmd(priv, MT7530_FDB_FLUSH, NULL); if (ret < 0) @@ -1284,7 +1392,16 @@ static void mt7530_phylink_mac_config(struct dsa_switch *ds, int port, if (state->interface != PHY_INTERFACE_MODE_GMII) return; break; - /* case 5: Port 5 is not supported! */ + case 5: /* 2nd cpu port with phy of port 0 or 4 / external phy */ + if (priv->p5_interface == state->interface) + break; + if (!phy_interface_mode_is_rgmii(state->interface) && + state->interface != PHY_INTERFACE_MODE_MII && + state->interface != PHY_INTERFACE_MODE_GMII) + return; + + mt7530_setup_port5(ds, state->interface); + break; case 6: /* 1st cpu port */ if (priv->p6_interface == state->interface) break; @@ -1324,6 +1441,10 @@ static void mt7530_phylink_mac_config(struct dsa_switch *ds, int port, mcr_new |= PMCR_IFG_XMIT(1) | PMCR_MAC_MODE | PMCR_BACKOFF_EN | PMCR_BACKPR_EN | PMCR_FORCE_MODE | PMCR_FORCE_LNK; + /* Are we connected to external phy */ + if (port == 5 && dsa_is_user_port(ds, 5)) + mcr_new |= PMCR_EXT_PHY; + switch (state->speed) { case SPEED_1000: mcr_new |= PMCR_FORCE_SPEED_1000; @@ -1379,7 +1500,13 @@ static void mt7530_phylink_validate(struct dsa_switch *ds, int port, state->interface != PHY_INTERFACE_MODE_GMII) goto unsupported; break; - /* case 5: Port 5 not supported! */ + case 5: /* 2nd cpu port with phy of port 0 or 4 / external phy */ + if (state->interface != PHY_INTERFACE_MODE_NA && + !phy_interface_mode_is_rgmii(state->interface) && + state->interface != PHY_INTERFACE_MODE_MII && + state->interface != PHY_INTERFACE_MODE_GMII) + goto unsupported; + break; case 6: /* 1st cpu port */ if (state->interface != PHY_INTERFACE_MODE_NA && state->interface != PHY_INTERFACE_MODE_RGMII && @@ -1396,15 +1523,21 @@ unsupported: phylink_set_port_modes(mask); phylink_set(mask, Autoneg); - if (state->interface != PHY_INTERFACE_MODE_TRGMII) { + if (state->interface == PHY_INTERFACE_MODE_TRGMII) { + phylink_set(mask, 1000baseT_Full); + } else { phylink_set(mask, 10baseT_Half); phylink_set(mask, 10baseT_Full); phylink_set(mask, 100baseT_Half); phylink_set(mask, 100baseT_Full); - phylink_set(mask, 1000baseT_Half); - } - phylink_set(mask, 1000baseT_Full); + if (state->interface != PHY_INTERFACE_MODE_MII) { + phylink_set(mask, 1000baseT_Half); + phylink_set(mask, 1000baseT_Full); + if (port == 5) + phylink_set(mask, 1000baseX_Full); + } + } phylink_set(mask, Pause); phylink_set(mask, Asym_Pause); diff --git a/drivers/net/dsa/mt7530.h b/drivers/net/dsa/mt7530.h index 107dd04acede3..ccb9da8cad0d1 100644 --- a/drivers/net/dsa/mt7530.h +++ b/drivers/net/dsa/mt7530.h @@ -186,6 +186,7 @@ enum mt7530_vlan_port_attr { /* Register for port MAC control register */ #define MT7530_PMCR_P(x) (0x3000 + ((x) * 0x100)) #define PMCR_IFG_XMIT(x) (((x) & 0x3) << 18) +#define PMCR_EXT_PHY BIT(17) #define PMCR_MAC_MODE BIT(16) #define PMCR_FORCE_MODE BIT(15) #define PMCR_TX_EN BIT(14) @@ -245,6 +246,7 @@ enum mt7530_vlan_port_attr { /* Register for hw trap modification */ #define MT7530_MHWTRAP 0x7804 +#define MHWTRAP_PHY0_SEL BIT(20) #define MHWTRAP_MANUAL BIT(16) #define MHWTRAP_P5_MAC_SEL BIT(13) #define MHWTRAP_P6_DIS BIT(8) @@ -402,6 +404,30 @@ struct mt7530_port { u16 pvid; }; +/* Port 5 interface select definitions */ +enum p5_interface_select { + P5_DISABLED = 0, + P5_INTF_SEL_PHY_P0, + P5_INTF_SEL_PHY_P4, + P5_INTF_SEL_GMAC5, +}; + +static const char *p5_intf_modes(unsigned int p5_interface) +{ + switch (p5_interface) { + case P5_DISABLED: + return "DISABLED"; + case P5_INTF_SEL_PHY_P0: + return "PHY P0"; + case P5_INTF_SEL_PHY_P4: + return "PHY P4"; + case P5_INTF_SEL_GMAC5: + return "GMAC5"; + default: + return "unknown"; + } +} + /* struct mt7530_priv - This is the main data structure for holding the state * of the driver * @dev: The device pointer @@ -418,6 +444,7 @@ struct mt7530_port { * @reg_mutex: The lock for protecting among process accessing * registers * @p6_interface Holding the current port 6 interface + * @p5_intf_sel: Holding the current port 5 interface select */ struct mt7530_priv { struct device *dev; @@ -431,6 +458,8 @@ struct mt7530_priv { unsigned int id; bool mcm; phy_interface_t p6_interface; + phy_interface_t p5_interface; + unsigned int p5_intf_sel; struct mt7530_port ports[MT7530_NUM_PORTS]; /* protect among processes for registers access*/ -- 2.39.5