// SPDX-License-Identifier: GPL-2.0 /* * TI PHY drivers * */ #include #include #include #include #include #include #include #include #include #include "ti_phy_init.h" /* TI DP83867 */ #define DP83867_DEVADDR 0x1f #define MII_DP83867_PHYCTRL 0x10 #define MII_DP83867_MICR 0x12 #define MII_DP83867_CFG2 0x14 #define MII_DP83867_BISCR 0x16 #define DP83867_CTRL 0x1f /* Extended Registers */ #define DP83867_CFG4 0x0031 #define DP83867_RGMIICTL 0x0032 #define DP83867_STRAP_STS1 0x006E #define DP83867_STRAP_STS2 0x006f #define DP83867_RGMIIDCTL 0x0086 #define DP83867_IO_MUX_CFG 0x0170 #define DP83867_SGMIICTL 0x00D3 #define DP83867_SW_RESET BIT(15) #define DP83867_SW_RESTART BIT(14) /* MICR Interrupt bits */ #define MII_DP83867_MICR_AN_ERR_INT_EN BIT(15) #define MII_DP83867_MICR_SPEED_CHNG_INT_EN BIT(14) #define MII_DP83867_MICR_DUP_MODE_CHNG_INT_EN BIT(13) #define MII_DP83867_MICR_PAGE_RXD_INT_EN BIT(12) #define MII_DP83867_MICR_AUTONEG_COMP_INT_EN BIT(11) #define MII_DP83867_MICR_LINK_STS_CHNG_INT_EN BIT(10) #define MII_DP83867_MICR_FALSE_CARRIER_INT_EN BIT(8) #define MII_DP83867_MICR_SLEEP_MODE_CHNG_INT_EN BIT(4) #define MII_DP83867_MICR_WOL_INT_EN BIT(3) #define MII_DP83867_MICR_XGMII_ERR_INT_EN BIT(2) #define MII_DP83867_MICR_POL_CHNG_INT_EN BIT(1) #define MII_DP83867_MICR_JABBER_INT_EN BIT(0) /* RGMIICTL bits */ #define DP83867_RGMII_TX_CLK_DELAY_EN BIT(1) #define DP83867_RGMII_RX_CLK_DELAY_EN BIT(0) /* STRAP_STS1 bits */ #define DP83867_STRAP_STS1_RESERVED BIT(11) /* STRAP_STS2 bits */ #define DP83867_STRAP_STS2_CLK_SKEW_TX_MASK GENMASK(6, 4) #define DP83867_STRAP_STS2_CLK_SKEW_TX_SHIFT 4 #define DP83867_STRAP_STS2_CLK_SKEW_RX_MASK GENMASK(2, 0) #define DP83867_STRAP_STS2_CLK_SKEW_RX_SHIFT 0 #define DP83867_STRAP_STS2_CLK_SKEW_NONE BIT(2) /* PHY CTRL bits */ #define DP83867_PHYCR_FIFO_DEPTH_SHIFT 14 #define DP83867_PHYCR_FIFO_DEPTH_MASK GENMASK(15, 14) #define DP83867_PHYCR_RESERVED_MASK BIT(11) #define DP83867_PHYCR_FORCE_LINK_GOOD BIT(10) #define DP83867_MDI_CROSSOVER 5 #define DP83867_MDI_CROSSOVER_MDIX 2 #define DP83867_PHYCTRL_SGMIIEN 0x0800 #define DP83867_PHYCTRL_RXFIFO_SHIFT 12 #define DP83867_PHYCTRL_TXFIFO_SHIFT 14 /* RGMIIDCTL bits */ #define DP83867_RGMII_TX_CLK_DELAY_MAX 0xf #define DP83867_RGMII_TX_CLK_DELAY_SHIFT 4 #define DP83867_RGMII_RX_CLK_DELAY_MAX 0xf /* CFG2 bits */ #define MII_DP83867_CFG2_SPEEDOPT_10EN 0x0040 #define MII_DP83867_CFG2_SGMII_AUTONEGEN 0x0080 #define MII_DP83867_CFG2_SPEEDOPT_ENH 0x0100 #define MII_DP83867_CFG2_SPEEDOPT_CNT 0x0800 #define MII_DP83867_CFG2_SPEEDOPT_INTLOW 0x2000 #define MII_DP83867_CFG2_MASK 0x003F /* User setting - can be taken from DTS */ #define DEFAULT_FIFO_DEPTH DP83867_PHYCR_FIFO_DEPTH_4_B_NIB /* IO_MUX_CFG bits */ #define DP83867_IO_MUX_CFG_IO_IMPEDANCE_CTRL 0x1f #define DP83867_IO_MUX_CFG_IO_IMPEDANCE_MAX 0x0 #define DP83867_IO_MUX_CFG_IO_IMPEDANCE_MIN 0x1f #define DP83867_IO_MUX_CFG_CLK_O_DISABLE BIT(6) #define DP83867_IO_MUX_CFG_CLK_O_SEL_SHIFT 8 #define DP83867_IO_MUX_CFG_CLK_O_SEL_MASK \ GENMASK(0x1f, DP83867_IO_MUX_CFG_CLK_O_SEL_SHIFT) /* CFG4 bits */ #define DP83867_CFG4_PORT_MIRROR_EN BIT(0) /* SGMIICTL bits */ #define DP83867_SGMII_TYPE BIT(14) enum { DP83867_PORT_MIRRORING_KEEP, DP83867_PORT_MIRRORING_EN, DP83867_PORT_MIRRORING_DIS, }; struct dp83867_private { u32 rx_id_delay; u32 tx_id_delay; int fifo_depth; int io_impedance; bool rxctrl_strap_quirk; int port_mirroring; bool set_clk_output; unsigned int clk_output_sel; bool sgmii_ref_clk_en; }; static int dp83867_config_port_mirroring(struct phy_device *phydev) { struct dp83867_private *dp83867 = (struct dp83867_private *)phydev->priv; u16 val; val = phy_read_mmd(phydev, DP83867_DEVADDR, DP83867_CFG4); if (dp83867->port_mirroring == DP83867_PORT_MIRRORING_EN) val |= DP83867_CFG4_PORT_MIRROR_EN; else val &= ~DP83867_CFG4_PORT_MIRROR_EN; phy_write_mmd(phydev, DP83867_DEVADDR, DP83867_CFG4, val); return 0; } /** * dp83867_data_init - Convenience function for setting PHY specific data * * @phydev: the phy_device struct */ static int dp83867_of_init(struct phy_device *phydev) { struct dp83867_private *dp83867 = phydev->priv; ofnode node; int ret; node = phy_get_ofnode(phydev); if (!ofnode_valid(node)) return 0; /* Optional configuration */ ret = ofnode_read_u32(node, "ti,clk-output-sel", &dp83867->clk_output_sel); /* If not set, keep default */ if (!ret) { dp83867->set_clk_output = true; /* Valid values are 0 to DP83867_CLK_O_SEL_REF_CLK or * DP83867_CLK_O_SEL_OFF. */ if (dp83867->clk_output_sel > DP83867_CLK_O_SEL_REF_CLK && dp83867->clk_output_sel != DP83867_CLK_O_SEL_OFF) { pr_debug("ti,clk-output-sel value %u out of range\n", dp83867->clk_output_sel); return -EINVAL; } } if (ofnode_read_bool(node, "ti,max-output-impedance")) dp83867->io_impedance = DP83867_IO_MUX_CFG_IO_IMPEDANCE_MAX; else if (ofnode_read_bool(node, "ti,min-output-impedance")) dp83867->io_impedance = DP83867_IO_MUX_CFG_IO_IMPEDANCE_MIN; else dp83867->io_impedance = -EINVAL; if (ofnode_read_bool(node, "ti,dp83867-rxctrl-strap-quirk")) dp83867->rxctrl_strap_quirk = true; /* Existing behavior was to use default pin strapping delay in rgmii * mode, but rgmii should have meant no delay. Warn existing users. */ if (phydev->interface == PHY_INTERFACE_MODE_RGMII) { u16 val = phy_read_mmd(phydev, DP83867_DEVADDR, DP83867_STRAP_STS2); u16 txskew = (val & DP83867_STRAP_STS2_CLK_SKEW_TX_MASK) >> DP83867_STRAP_STS2_CLK_SKEW_TX_SHIFT; u16 rxskew = (val & DP83867_STRAP_STS2_CLK_SKEW_RX_MASK) >> DP83867_STRAP_STS2_CLK_SKEW_RX_SHIFT; if (txskew != DP83867_STRAP_STS2_CLK_SKEW_NONE || rxskew != DP83867_STRAP_STS2_CLK_SKEW_NONE) pr_warn("PHY has delays via pin strapping, but phy-mode = 'rgmii'\n" "Should be 'rgmii-id' to use internal delays\n"); } /* RX delay *must* be specified if internal delay of RX is used. */ if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID || phydev->interface == PHY_INTERFACE_MODE_RGMII_RXID) { ret = ofnode_read_u32(node, "ti,rx-internal-delay", &dp83867->rx_id_delay); if (ret) { pr_debug("ti,rx-internal-delay must be specified\n"); return ret; } if (dp83867->rx_id_delay > DP83867_RGMII_RX_CLK_DELAY_MAX) { pr_debug("ti,rx-internal-delay value of %u out of range\n", dp83867->rx_id_delay); return -EINVAL; } } /* TX delay *must* be specified if internal delay of RX is used. */ if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID || phydev->interface == PHY_INTERFACE_MODE_RGMII_TXID) { ret = ofnode_read_u32(node, "ti,tx-internal-delay", &dp83867->tx_id_delay); if (ret) { debug("ti,tx-internal-delay must be specified\n"); return ret; } if (dp83867->tx_id_delay > DP83867_RGMII_TX_CLK_DELAY_MAX) { pr_debug("ti,tx-internal-delay value of %u out of range\n", dp83867->tx_id_delay); return -EINVAL; } } dp83867->fifo_depth = ofnode_read_u32_default(node, "ti,fifo-depth", DEFAULT_FIFO_DEPTH); if (ofnode_read_bool(node, "enet-phy-lane-swap")) dp83867->port_mirroring = DP83867_PORT_MIRRORING_EN; if (ofnode_read_bool(node, "enet-phy-lane-no-swap")) dp83867->port_mirroring = DP83867_PORT_MIRRORING_DIS; if (ofnode_read_bool(node, "ti,sgmii-ref-clock-output-enable")) dp83867->sgmii_ref_clk_en = true; return 0; } static int dp83867_config(struct phy_device *phydev) { struct dp83867_private *dp83867; int val, delay, cfg2; int ret, bs; dp83867 = (struct dp83867_private *)phydev->priv; ret = dp83867_of_init(phydev); if (ret) return ret; /* Restart the PHY. */ val = phy_read(phydev, MDIO_DEVAD_NONE, DP83867_CTRL); phy_write(phydev, MDIO_DEVAD_NONE, DP83867_CTRL, val | DP83867_SW_RESTART); /* Mode 1 or 2 workaround */ if (dp83867->rxctrl_strap_quirk) { val = phy_read_mmd(phydev, DP83867_DEVADDR, DP83867_CFG4); val &= ~BIT(7); phy_write_mmd(phydev, DP83867_DEVADDR, DP83867_CFG4, val); } if (phy_interface_is_rgmii(phydev)) { val = phy_read(phydev, MDIO_DEVAD_NONE, MII_DP83867_PHYCTRL); if (val < 0) { ret = val; goto err_out; } val &= ~DP83867_PHYCR_FIFO_DEPTH_MASK; val |= (dp83867->fifo_depth << DP83867_PHYCR_FIFO_DEPTH_SHIFT); /* Do not force link good */ val &= ~DP83867_PHYCR_FORCE_LINK_GOOD; /* The code below checks if "port mirroring" N/A MODE4 has been * enabled during power on bootstrap. * * Such N/A mode enabled by mistake can put PHY IC in some * internal testing mode and disable RGMII transmission. * * In this particular case one needs to check STRAP_STS1 * register's bit 11 (marked as RESERVED). */ bs = phy_read_mmd(phydev, DP83867_DEVADDR, DP83867_STRAP_STS1); if (bs & DP83867_STRAP_STS1_RESERVED) val &= ~DP83867_PHYCR_RESERVED_MASK; ret = phy_write(phydev, MDIO_DEVAD_NONE, MII_DP83867_PHYCTRL, val); val = phy_read_mmd(phydev, DP83867_DEVADDR, DP83867_RGMIICTL); val &= ~(DP83867_RGMII_TX_CLK_DELAY_EN | DP83867_RGMII_RX_CLK_DELAY_EN); if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID) val |= (DP83867_RGMII_TX_CLK_DELAY_EN | DP83867_RGMII_RX_CLK_DELAY_EN); if (phydev->interface == PHY_INTERFACE_MODE_RGMII_TXID) val |= DP83867_RGMII_TX_CLK_DELAY_EN; if (phydev->interface == PHY_INTERFACE_MODE_RGMII_RXID) val |= DP83867_RGMII_RX_CLK_DELAY_EN; phy_write_mmd(phydev, DP83867_DEVADDR, DP83867_RGMIICTL, val); delay = (dp83867->rx_id_delay | (dp83867->tx_id_delay << DP83867_RGMII_TX_CLK_DELAY_SHIFT)); phy_write_mmd(phydev, DP83867_DEVADDR, DP83867_RGMIIDCTL, delay); } if (phydev->interface == PHY_INTERFACE_MODE_SGMII) { if (dp83867->sgmii_ref_clk_en) phy_write_mmd(phydev, DP83867_DEVADDR, DP83867_SGMIICTL, DP83867_SGMII_TYPE); phy_write(phydev, MDIO_DEVAD_NONE, MII_BMCR, (BMCR_ANENABLE | BMCR_FULLDPLX | BMCR_SPEED1000)); cfg2 = phy_read(phydev, phydev->addr, MII_DP83867_CFG2); cfg2 &= MII_DP83867_CFG2_MASK; cfg2 |= (MII_DP83867_CFG2_SPEEDOPT_10EN | MII_DP83867_CFG2_SGMII_AUTONEGEN | MII_DP83867_CFG2_SPEEDOPT_ENH | MII_DP83867_CFG2_SPEEDOPT_CNT | MII_DP83867_CFG2_SPEEDOPT_INTLOW); phy_write(phydev, MDIO_DEVAD_NONE, MII_DP83867_CFG2, cfg2); phy_write_mmd(phydev, DP83867_DEVADDR, DP83867_RGMIICTL, 0x0); phy_write(phydev, MDIO_DEVAD_NONE, MII_DP83867_PHYCTRL, DP83867_PHYCTRL_SGMIIEN | (DP83867_MDI_CROSSOVER_MDIX << DP83867_MDI_CROSSOVER) | (dp83867->fifo_depth << DP83867_PHYCTRL_RXFIFO_SHIFT) | (dp83867->fifo_depth << DP83867_PHYCTRL_TXFIFO_SHIFT)); phy_write(phydev, MDIO_DEVAD_NONE, MII_DP83867_BISCR, 0x0); } if (dp83867->io_impedance >= 0) { val = phy_read_mmd(phydev, DP83867_DEVADDR, DP83867_IO_MUX_CFG); val &= ~DP83867_IO_MUX_CFG_IO_IMPEDANCE_CTRL; val |= dp83867->io_impedance & DP83867_IO_MUX_CFG_IO_IMPEDANCE_CTRL; phy_write_mmd(phydev, DP83867_DEVADDR, DP83867_IO_MUX_CFG, val); } if (dp83867->port_mirroring != DP83867_PORT_MIRRORING_KEEP) dp83867_config_port_mirroring(phydev); /* Clock output selection if muxing property is set */ if (dp83867->set_clk_output) { val = phy_read_mmd(phydev, DP83867_DEVADDR, DP83867_IO_MUX_CFG); if (dp83867->clk_output_sel == DP83867_CLK_O_SEL_OFF) { val |= DP83867_IO_MUX_CFG_CLK_O_DISABLE; } else { val &= ~(DP83867_IO_MUX_CFG_CLK_O_SEL_MASK | DP83867_IO_MUX_CFG_CLK_O_DISABLE); val |= dp83867->clk_output_sel << DP83867_IO_MUX_CFG_CLK_O_SEL_SHIFT; } phy_write_mmd(phydev, DP83867_DEVADDR, DP83867_IO_MUX_CFG, val); } genphy_config_aneg(phydev); return 0; err_out: return ret; } static int dp83867_probe(struct phy_device *phydev) { struct dp83867_private *dp83867; dp83867 = kzalloc(sizeof(*dp83867), GFP_KERNEL); if (!dp83867) return -ENOMEM; phydev->priv = dp83867; return 0; } U_BOOT_PHY_DRIVER(dp83867) = { .name = "TI DP83867", .uid = 0x2000a231, .mask = 0xfffffff0, .features = PHY_GBIT_FEATURES, .probe = dp83867_probe, .config = &dp83867_config, .startup = &genphy_startup, .shutdown = &genphy_shutdown, };