// SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause /* * Felix (VSC9959) Ethernet switch driver * Copyright 2018-2021 NXP */ /* * This driver is used for the Ethernet switch integrated into NXP LS1028A. * Felix switch is derived from Microsemi Ocelot but there are several NXP * adaptations that makes the two U-Boot drivers largely incompatible. * * Felix on LS1028A has 4 front panel ports and two internal ports, connected * to ENETC interfaces. We're using one of the ENETC interfaces to push traffic * into the switch. Injection/extraction headers are used to identify * egress/ingress ports in the switch for Tx/Rx. */ #include #include #include #include #include #include #include /* defines especially around PCS are reused from enetc */ #include "../fsl_enetc.h" #define PCI_DEVICE_ID_FELIX_ETHSW 0xEEF0 /* Felix has in fact 6 ports, but we don't use the last internal one */ #define FELIX_PORT_COUNT 5 /* Front panel port mask */ #define FELIX_FP_PORT_MASK 0xf /* Register map for BAR4 */ #define FELIX_SYS 0x010000 #define FELIX_ES0 0x040000 #define FELIX_IS1 0x050000 #define FELIX_IS2 0x060000 #define FELIX_GMII(port) (0x100000 + (port) * 0x10000) #define FELIX_QSYS 0x200000 #define FELIX_DEVCPU_GCB 0x070000 #define FELIX_DEVCPU_GCB_SOFT_RST (FELIX_DEVCPU_GCB + 0x00000004) #define SOFT_SWC_RST BIT(0) #define FELIX_SYS_SYSTEM (FELIX_SYS + 0x00000E00) #define FELIX_SYS_SYSTEM_EN BIT(0) #define FELIX_SYS_RAM_CTRL (FELIX_SYS + 0x00000F24) #define FELIX_SYS_RAM_CTRL_INIT BIT(1) #define FELIX_SYS_SYSTEM_PORT_MODE(a) (FELIX_SYS_SYSTEM + 0xC + (a) * 4) #define FELIX_SYS_SYSTEM_PORT_MODE_CPU 0x0000001e #define FELIX_ES0_TCAM_CTRL (FELIX_ES0 + 0x000003C0) #define FELIX_ES0_TCAM_CTRL_EN BIT(0) #define FELIX_IS1_TCAM_CTRL (FELIX_IS1 + 0x000003C0) #define FELIX_IS1_TCAM_CTRL_EN BIT(0) #define FELIX_IS2_TCAM_CTRL (FELIX_IS2 + 0x000003C0) #define FELIX_IS2_TCAM_CTRL_EN BIT(0) #define FELIX_GMII_CLOCK_CFG(port) (FELIX_GMII(port) + 0x00000000) #define FELIX_GMII_CLOCK_CFG_LINK_1G 1 #define FELIX_GMII_CLOCK_CFG_LINK_100M 2 #define FELIX_GMII_CLOCK_CFG_LINK_10M 3 #define FELIX_GMII_MAC_ENA_CFG(port) (FELIX_GMII(port) + 0x0000001C) #define FELIX_GMII_MAX_ENA_CFG_TX BIT(0) #define FELIX_GMII_MAX_ENA_CFG_RX BIT(4) #define FELIX_GMII_MAC_IFG_CFG(port) (FELIX_GMII(port) + 0x0000001C + 0x14) #define FELIX_GMII_MAC_IFG_CFG_DEF 0x515 #define FELIX_QSYS_SYSTEM (FELIX_QSYS + 0x0000F460) #define FELIX_QSYS_SYSTEM_SW_PORT_MODE(a) \ (FELIX_QSYS_SYSTEM + 0x20 + (a) * 4) #define FELIX_QSYS_SYSTEM_SW_PORT_ENA BIT(14) #define FELIX_QSYS_SYSTEM_SW_PORT_LOSSY BIT(9) #define FELIX_QSYS_SYSTEM_SW_PORT_SCH(a) (((a) & 0x3800) << 11) #define FELIX_QSYS_SYSTEM_EXT_CPU_CFG (FELIX_QSYS_SYSTEM + 0x80) #define FELIX_QSYS_SYSTEM_EXT_CPU_PORT(a) (((a) & 0xf) << 8 | 0xff) /* internal MDIO in BAR0 */ #define FELIX_PM_IMDIO_BASE 0x8030 /* Serdes block on LS1028A */ #define FELIX_SERDES_BASE 0x1ea0000L #define FELIX_SERDES_LNATECR0(lane) (FELIX_SERDES_BASE + 0x818 + \ (lane) * 0x40) #define FELIX_SERDES_LNATECR0_ADPT_EQ 0x00003000 #define FELIX_SERDES_SGMIICR1(lane) (FELIX_SERDES_BASE + 0x1804 + \ (lane) * 0x10) #define FELIX_SERDES_SGMIICR1_SGPCS BIT(11) #define FELIX_SERDES_SGMIICR1_MDEV(a) (((a) & 0x1f) << 27) #define FELIX_PCS_CTRL 0 #define FELIX_PCS_CTRL_RST BIT(15) /* * The long prefix format used here contains two dummy MAC addresses, a magic * value in place of a VLAN tag followed by the extraction/injection header and * the original L2 frame. Out of all this we only use the port ID. */ #define FELIX_DSA_TAG_LEN sizeof(struct felix_dsa_tag) #define FELIX_DSA_TAG_MAGIC 0x0a008088 #define FELIX_DSA_TAG_INJ_PORT 7 #define FELIX_DSA_TAG_INJ_PORT_SET(a) (0x1 << ((a) & FELIX_FP_PORT_MASK)) #define FELIX_DSA_TAG_EXT_PORT 10 #define FELIX_DSA_TAG_EXT_PORT_GET(a) ((a) >> 3) struct felix_dsa_tag { uchar d_mac[6]; uchar s_mac[6]; u32 magic; uchar meta[16]; }; struct felix_priv { void *regs_base; void *imdio_base; struct mii_dev imdio; }; /* MDIO wrappers, we're using these to drive internal MDIO to get to serdes */ static int felix_mdio_read(struct mii_dev *bus, int addr, int devad, int reg) { struct enetc_mdio_priv priv; priv.regs_base = bus->priv; return enetc_mdio_read_priv(&priv, addr, devad, reg); } static int felix_mdio_write(struct mii_dev *bus, int addr, int devad, int reg, u16 val) { struct enetc_mdio_priv priv; priv.regs_base = bus->priv; return enetc_mdio_write_priv(&priv, addr, devad, reg, val); } /* set up serdes for SGMII */ static void felix_init_sgmii(struct mii_dev *imdio, int pidx, bool an) { u16 reg; /* set up PCS lane address */ out_le32(FELIX_SERDES_SGMIICR1(pidx), FELIX_SERDES_SGMIICR1_SGPCS | FELIX_SERDES_SGMIICR1_MDEV(pidx)); /* * Set to SGMII mode, for 1Gbps enable AN, for 2.5Gbps set fixed speed. * Although fixed speed is 1Gbps, we could be running at 2.5Gbps based * on PLL configuration. Setting 1G for 2.5G here is counter intuitive * but intentional. */ reg = ENETC_PCS_IF_MODE_SGMII; reg |= an ? ENETC_PCS_IF_MODE_SGMII_AN : ENETC_PCS_IF_MODE_SPEED_1G; felix_mdio_write(imdio, pidx, MDIO_DEVAD_NONE, ENETC_PCS_IF_MODE, reg); /* Dev ability - SGMII */ felix_mdio_write(imdio, pidx, MDIO_DEVAD_NONE, ENETC_PCS_DEV_ABILITY, ENETC_PCS_DEV_ABILITY_SGMII); /* Adjust link timer for SGMII */ felix_mdio_write(imdio, pidx, MDIO_DEVAD_NONE, ENETC_PCS_LINK_TIMER1, ENETC_PCS_LINK_TIMER1_VAL); felix_mdio_write(imdio, pidx, MDIO_DEVAD_NONE, ENETC_PCS_LINK_TIMER2, ENETC_PCS_LINK_TIMER2_VAL); reg = ENETC_PCS_CR_DEF_VAL; reg |= an ? ENETC_PCS_CR_RESET_AN : ENETC_PCS_CR_RST; /* restart PCS AN */ felix_mdio_write(imdio, pidx, MDIO_DEVAD_NONE, ENETC_PCS_CR, reg); } /* set up MAC and serdes for (Q)SXGMII */ static int felix_init_sxgmii(struct mii_dev *imdio, int pidx) { int timeout = 1000; /* set up transit equalization control on serdes lane */ out_le32(FELIX_SERDES_LNATECR0(1), FELIX_SERDES_LNATECR0_ADPT_EQ); /*reset lane */ felix_mdio_write(imdio, pidx, MDIO_MMD_PCS, FELIX_PCS_CTRL, FELIX_PCS_CTRL_RST); while (felix_mdio_read(imdio, pidx, MDIO_MMD_PCS, FELIX_PCS_CTRL) & FELIX_PCS_CTRL_RST && --timeout) { mdelay(10); } if (felix_mdio_read(imdio, pidx, MDIO_MMD_PCS, FELIX_PCS_CTRL) & FELIX_PCS_CTRL_RST) return -ETIME; /* Dev ability - SXGMII */ felix_mdio_write(imdio, pidx, ENETC_PCS_DEVAD_REPL, ENETC_PCS_DEV_ABILITY, ENETC_PCS_DEV_ABILITY_SXGMII); /* Restart PCS AN */ felix_mdio_write(imdio, pidx, ENETC_PCS_DEVAD_REPL, ENETC_PCS_CR, ENETC_PCS_CR_RST | ENETC_PCS_CR_RESET_AN); felix_mdio_write(imdio, pidx, ENETC_PCS_DEVAD_REPL, ENETC_PCS_REPL_LINK_TIMER_1, ENETC_PCS_REPL_LINK_TIMER_1_DEF); felix_mdio_write(imdio, pidx, ENETC_PCS_DEVAD_REPL, ENETC_PCS_REPL_LINK_TIMER_2, ENETC_PCS_REPL_LINK_TIMER_2_DEF); return 0; } /* Apply protocol specific configuration to MAC, serdes as needed */ static void felix_start_pcs(struct udevice *dev, int port, struct phy_device *phy, struct mii_dev *imdio) { ofnode node = dsa_port_get_ofnode(dev, port); bool inband_an = ofnode_eth_uses_inband_aneg(node); switch (phy->interface) { case PHY_INTERFACE_MODE_SGMII: case PHY_INTERFACE_MODE_2500BASEX: case PHY_INTERFACE_MODE_QSGMII: felix_init_sgmii(imdio, port, inband_an); break; case PHY_INTERFACE_MODE_10GBASER: case PHY_INTERFACE_MODE_USXGMII: if (felix_init_sxgmii(imdio, port)) dev_err(dev, "PCS reset timeout on port %d\n", port); break; default: break; } } static void felix_init(struct udevice *dev) { struct dsa_pdata *pdata = dev_get_uclass_plat(dev); struct felix_priv *priv = dev_get_priv(dev); void *base = priv->regs_base; int timeout = 100; /* Switch core reset */ out_le32(base + FELIX_DEVCPU_GCB_SOFT_RST, SOFT_SWC_RST); while (in_le32(base + FELIX_DEVCPU_GCB_SOFT_RST) & SOFT_SWC_RST && --timeout) udelay(10); if (in_le32(base + FELIX_DEVCPU_GCB_SOFT_RST) & SOFT_SWC_RST) dev_err(dev, "Timeout waiting for switch core reset\n"); timeout = 100; /* Init core memories */ out_le32(base + FELIX_SYS_RAM_CTRL, FELIX_SYS_RAM_CTRL_INIT); while (in_le32(base + FELIX_SYS_RAM_CTRL) & FELIX_SYS_RAM_CTRL_INIT && --timeout) udelay(10); if (in_le32(base + FELIX_SYS_RAM_CTRL) & FELIX_SYS_RAM_CTRL_INIT) dev_err(dev, "Timeout waiting for switch memories\n"); /* Start switch core, set up ES0, IS1, IS2 */ out_le32(base + FELIX_SYS_SYSTEM, FELIX_SYS_SYSTEM_EN); out_le32(base + FELIX_ES0_TCAM_CTRL, FELIX_ES0_TCAM_CTRL_EN); out_le32(base + FELIX_IS1_TCAM_CTRL, FELIX_IS1_TCAM_CTRL_EN); out_le32(base + FELIX_IS2_TCAM_CTRL, FELIX_IS2_TCAM_CTRL_EN); udelay(20); priv->imdio.read = felix_mdio_read; priv->imdio.write = felix_mdio_write; priv->imdio.priv = priv->imdio_base + FELIX_PM_IMDIO_BASE; strlcpy(priv->imdio.name, dev->name, MDIO_NAME_LEN); /* set up CPU port */ out_le32(base + FELIX_QSYS_SYSTEM_EXT_CPU_CFG, FELIX_QSYS_SYSTEM_EXT_CPU_PORT(pdata->cpu_port)); out_le32(base + FELIX_SYS_SYSTEM_PORT_MODE(pdata->cpu_port), FELIX_SYS_SYSTEM_PORT_MODE_CPU); } /* * Probe Felix: * - enable the PCI function * - map BAR 4 * - init switch core and port registers */ static int felix_probe(struct udevice *dev) { struct felix_priv *priv = dev_get_priv(dev); int err; if (ofnode_valid(dev_ofnode(dev)) && !ofnode_is_available(dev_ofnode(dev))) { dev_dbg(dev, "switch disabled\n"); return -ENODEV; } priv->imdio_base = dm_pci_map_bar(dev, PCI_BASE_ADDRESS_0, 0); if (!priv->imdio_base) { dev_err(dev, "failed to map BAR0\n"); return -EINVAL; } priv->regs_base = dm_pci_map_bar(dev, PCI_BASE_ADDRESS_4, 0); if (!priv->regs_base) { dev_err(dev, "failed to map BAR4\n"); return -EINVAL; } /* register internal MDIO for debug */ if (!miiphy_get_dev_by_name(dev->name)) { struct mii_dev *mii_bus; mii_bus = mdio_alloc(); if (!mii_bus) return -ENOMEM; mii_bus->read = felix_mdio_read; mii_bus->write = felix_mdio_write; mii_bus->priv = priv->imdio_base + FELIX_PM_IMDIO_BASE; strlcpy(mii_bus->name, dev->name, MDIO_NAME_LEN); err = mdio_register(mii_bus); if (err) { mdio_free(mii_bus); return err; } } dm_pci_clrset_config16(dev, PCI_COMMAND, 0, PCI_COMMAND_MEMORY); dsa_set_tagging(dev, FELIX_DSA_TAG_LEN, 0); /* set up registers */ felix_init(dev); return 0; } static int felix_port_probe(struct udevice *dev, int port, struct phy_device *phy) { int supported = PHY_GBIT_FEATURES | SUPPORTED_2500baseX_Full; struct felix_priv *priv = dev_get_priv(dev); phy->supported &= supported; phy->advertising &= supported; felix_start_pcs(dev, port, phy, &priv->imdio); return phy_config(phy); } static int felix_port_enable(struct udevice *dev, int port, struct phy_device *phy) { struct felix_priv *priv = dev_get_priv(dev); void *base = priv->regs_base; /* Set up MAC registers */ out_le32(base + FELIX_GMII_CLOCK_CFG(port), FELIX_GMII_CLOCK_CFG_LINK_1G); out_le32(base + FELIX_GMII_MAC_IFG_CFG(port), FELIX_GMII_MAC_IFG_CFG_DEF); out_le32(base + FELIX_GMII_MAC_ENA_CFG(port), FELIX_GMII_MAX_ENA_CFG_TX | FELIX_GMII_MAX_ENA_CFG_RX); out_le32(base + FELIX_QSYS_SYSTEM_SW_PORT_MODE(port), FELIX_QSYS_SYSTEM_SW_PORT_ENA | FELIX_QSYS_SYSTEM_SW_PORT_LOSSY | FELIX_QSYS_SYSTEM_SW_PORT_SCH(1)); return phy_startup(phy); } static void felix_port_disable(struct udevice *dev, int pidx, struct phy_device *phy) { struct felix_priv *priv = dev_get_priv(dev); void *base = priv->regs_base; out_le32(base + FELIX_GMII_MAC_ENA_CFG(pidx), 0); out_le32(base + FELIX_QSYS_SYSTEM_SW_PORT_MODE(pidx), FELIX_QSYS_SYSTEM_SW_PORT_LOSSY | FELIX_QSYS_SYSTEM_SW_PORT_SCH(1)); /* * we don't call phy_shutdown here to avoid waiting next time we use * the port, but the downside is that remote side will think we're * actively processing traffic although we are not. */ } static int felix_xmit(struct udevice *dev, int pidx, void *packet, int length) { struct felix_dsa_tag *tag = packet; tag->magic = FELIX_DSA_TAG_MAGIC; tag->meta[FELIX_DSA_TAG_INJ_PORT] = FELIX_DSA_TAG_INJ_PORT_SET(pidx); return 0; } static int felix_rcv(struct udevice *dev, int *pidx, void *packet, int length) { struct felix_dsa_tag *tag = packet; if (tag->magic != FELIX_DSA_TAG_MAGIC) return -EINVAL; *pidx = FELIX_DSA_TAG_EXT_PORT_GET(tag->meta[FELIX_DSA_TAG_EXT_PORT]); return 0; } static const struct dsa_ops felix_dsa_ops = { .port_probe = felix_port_probe, .port_enable = felix_port_enable, .port_disable = felix_port_disable, .xmit = felix_xmit, .rcv = felix_rcv, }; U_BOOT_DRIVER(felix_ethsw) = { .name = "felix-switch", .id = UCLASS_DSA, .probe = felix_probe, .ops = &felix_dsa_ops, .priv_auto = sizeof(struct felix_priv), }; static struct pci_device_id felix_ethsw_ids[] = { { PCI_DEVICE(PCI_VENDOR_ID_FREESCALE, PCI_DEVICE_ID_FELIX_ETHSW) }, {} }; U_BOOT_PCI_DEVICE(felix_ethsw, felix_ethsw_ids);