diff options
Diffstat (limited to 'drivers/net/mscc_eswitch/felix_switch.c')
| -rw-r--r-- | drivers/net/mscc_eswitch/felix_switch.c | 414 |
1 files changed, 414 insertions, 0 deletions
diff --git a/drivers/net/mscc_eswitch/felix_switch.c b/drivers/net/mscc_eswitch/felix_switch.c new file mode 100644 index 00000000000..f20e84e0f10 --- /dev/null +++ b/drivers/net/mscc_eswitch/felix_switch.c @@ -0,0 +1,414 @@ +// SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause +/* + * Felix (VSC9959) Ethernet switch driver + * Copyright 2018-2021 NXP Semiconductors + */ + +/* + * 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 <dm/device_compat.h> +#include <linux/delay.h> +#include <net/dsa.h> +#include <asm/io.h> +#include <miiphy.h> +#include <pci.h> + +/* 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_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) +{ + bool autoneg = true; + + if (phy->phy_id == PHY_FIXED_ID || + phy->interface == PHY_INTERFACE_MODE_SGMII_2500) + autoneg = false; + + switch (phy->interface) { + case PHY_INTERFACE_MODE_SGMII: + case PHY_INTERFACE_MODE_SGMII_2500: + case PHY_INTERFACE_MODE_QSGMII: + felix_init_sgmii(imdio, port, autoneg); + break; + case PHY_INTERFACE_MODE_XGMII: + case PHY_INTERFACE_MODE_XFI: + 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; + } +} + +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; + + /* 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; + strncpy(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); + + 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(); + mii_bus->read = felix_mdio_read; + mii_bus->write = felix_mdio_write; + mii_bus->priv = priv->imdio_base + FELIX_PM_IMDIO_BASE; + strncpy(mii_bus->name, dev->name, MDIO_NAME_LEN); + mdio_register(mii_bus); + } + + 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_enable(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); + 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)); + + felix_start_pcs(dev, port, phy, &priv->imdio); + + phy->supported &= supported; + phy->advertising &= supported; + phy_config(phy); + + phy_startup(phy); + + return 0; +} + +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_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); |