/* * Broadcom Starfighter 2 DSA switch driver * * Copyright (C) 2014, Broadcom Corporation * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "bcm_sf2.h" #include "bcm_sf2_regs.h" /* String, offset, and register size in bytes if different from 4 bytes */ static const struct bcm_sf2_hw_stats bcm_sf2_mib[] = { { "TxOctets", 0x000, 8 }, { "TxDropPkts", 0x020 }, { "TxQPKTQ0", 0x030 }, { "TxBroadcastPkts", 0x040 }, { "TxMulticastPkts", 0x050 }, { "TxUnicastPKts", 0x060 }, { "TxCollisions", 0x070 }, { "TxSingleCollision", 0x080 }, { "TxMultipleCollision", 0x090 }, { "TxDeferredCollision", 0x0a0 }, { "TxLateCollision", 0x0b0 }, { "TxExcessiveCollision", 0x0c0 }, { "TxFrameInDisc", 0x0d0 }, { "TxPausePkts", 0x0e0 }, { "TxQPKTQ1", 0x0f0 }, { "TxQPKTQ2", 0x100 }, { "TxQPKTQ3", 0x110 }, { "TxQPKTQ4", 0x120 }, { "TxQPKTQ5", 0x130 }, { "RxOctets", 0x140, 8 }, { "RxUndersizePkts", 0x160 }, { "RxPausePkts", 0x170 }, { "RxPkts64Octets", 0x180 }, { "RxPkts65to127Octets", 0x190 }, { "RxPkts128to255Octets", 0x1a0 }, { "RxPkts256to511Octets", 0x1b0 }, { "RxPkts512to1023Octets", 0x1c0 }, { "RxPkts1024toMaxPktsOctets", 0x1d0 }, { "RxOversizePkts", 0x1e0 }, { "RxJabbers", 0x1f0 }, { "RxAlignmentErrors", 0x200 }, { "RxFCSErrors", 0x210 }, { "RxGoodOctets", 0x220, 8 }, { "RxDropPkts", 0x240 }, { "RxUnicastPkts", 0x250 }, { "RxMulticastPkts", 0x260 }, { "RxBroadcastPkts", 0x270 }, { "RxSAChanges", 0x280 }, { "RxFragments", 0x290 }, { "RxJumboPkt", 0x2a0 }, { "RxSymblErr", 0x2b0 }, { "InRangeErrCount", 0x2c0 }, { "OutRangeErrCount", 0x2d0 }, { "EEELpiEvent", 0x2e0 }, { "EEELpiDuration", 0x2f0 }, { "RxDiscard", 0x300, 8 }, { "TxQPKTQ6", 0x320 }, { "TxQPKTQ7", 0x330 }, { "TxPkts64Octets", 0x340 }, { "TxPkts65to127Octets", 0x350 }, { "TxPkts128to255Octets", 0x360 }, { "TxPkts256to511Ocets", 0x370 }, { "TxPkts512to1023Ocets", 0x380 }, { "TxPkts1024toMaxPktOcets", 0x390 }, }; #define BCM_SF2_STATS_SIZE ARRAY_SIZE(bcm_sf2_mib) static void bcm_sf2_sw_get_strings(struct dsa_switch *ds, int port, uint8_t *data) { unsigned int i; for (i = 0; i < BCM_SF2_STATS_SIZE; i++) memcpy(data + i * ETH_GSTRING_LEN, bcm_sf2_mib[i].string, ETH_GSTRING_LEN); } static void bcm_sf2_sw_get_ethtool_stats(struct dsa_switch *ds, int port, uint64_t *data) { struct bcm_sf2_priv *priv = ds_to_priv(ds); const struct bcm_sf2_hw_stats *s; unsigned int i; u64 val = 0; u32 offset; mutex_lock(&priv->stats_mutex); /* Now fetch the per-port counters */ for (i = 0; i < BCM_SF2_STATS_SIZE; i++) { s = &bcm_sf2_mib[i]; /* Do a latched 64-bit read if needed */ offset = s->reg + CORE_P_MIB_OFFSET(port); if (s->sizeof_stat == 8) val = core_readq(priv, offset); else val = core_readl(priv, offset); data[i] = (u64)val; } mutex_unlock(&priv->stats_mutex); } static int bcm_sf2_sw_get_sset_count(struct dsa_switch *ds) { return BCM_SF2_STATS_SIZE; } static char *bcm_sf2_sw_drv_probe(struct device *dsa_dev, struct device *host_dev, int sw_addr, void **_priv) { struct bcm_sf2_priv *priv; priv = devm_kzalloc(dsa_dev, sizeof(*priv), GFP_KERNEL); if (!priv) return NULL; *_priv = priv; return "Broadcom Starfighter 2"; } static void bcm_sf2_imp_vlan_setup(struct dsa_switch *ds, int cpu_port) { struct bcm_sf2_priv *priv = ds_to_priv(ds); unsigned int i; u32 reg; /* Enable the IMP Port to be in the same VLAN as the other ports * on a per-port basis such that we only have Port i and IMP in * the same VLAN. */ for (i = 0; i < priv->hw_params.num_ports; i++) { if (!((1 << i) & ds->phys_port_mask)) continue; reg = core_readl(priv, CORE_PORT_VLAN_CTL_PORT(i)); reg |= (1 << cpu_port); core_writel(priv, reg, CORE_PORT_VLAN_CTL_PORT(i)); } } static void bcm_sf2_imp_setup(struct dsa_switch *ds, int port) { struct bcm_sf2_priv *priv = ds_to_priv(ds); u32 reg, val; /* Enable the port memories */ reg = core_readl(priv, CORE_MEM_PSM_VDD_CTRL); reg &= ~P_TXQ_PSM_VDD(port); core_writel(priv, reg, CORE_MEM_PSM_VDD_CTRL); /* Enable Broadcast, Multicast, Unicast forwarding to IMP port */ reg = core_readl(priv, CORE_IMP_CTL); reg |= (RX_BCST_EN | RX_MCST_EN | RX_UCST_EN); reg &= ~(RX_DIS | TX_DIS); core_writel(priv, reg, CORE_IMP_CTL); /* Enable forwarding */ core_writel(priv, SW_FWDG_EN, CORE_SWMODE); /* Enable IMP port in dumb mode */ reg = core_readl(priv, CORE_SWITCH_CTRL); reg |= MII_DUMB_FWDG_EN; core_writel(priv, reg, CORE_SWITCH_CTRL); /* Resolve which bit controls the Broadcom tag */ switch (port) { case 8: val = BRCM_HDR_EN_P8; break; case 7: val = BRCM_HDR_EN_P7; break; case 5: val = BRCM_HDR_EN_P5; break; default: val = 0; break; } /* Enable Broadcom tags for IMP port */ reg = core_readl(priv, CORE_BRCM_HDR_CTRL); reg |= val; core_writel(priv, reg, CORE_BRCM_HDR_CTRL); /* Enable reception Broadcom tag for CPU TX (switch RX) to * allow us to tag outgoing frames */ reg = core_readl(priv, CORE_BRCM_HDR_RX_DIS); reg &= ~(1 << port); core_writel(priv, reg, CORE_BRCM_HDR_RX_DIS); /* Enable transmission of Broadcom tags from the switch (CPU RX) to * allow delivering frames to the per-port net_devices */ reg = core_readl(priv, CORE_BRCM_HDR_TX_DIS); reg &= ~(1 << port); core_writel(priv, reg, CORE_BRCM_HDR_TX_DIS); /* Force link status for IMP port */ reg = core_readl(priv, CORE_STS_OVERRIDE_IMP); reg |= (MII_SW_OR | LINK_STS); core_writel(priv, reg, CORE_STS_OVERRIDE_IMP); } static void bcm_sf2_eee_enable_set(struct dsa_switch *ds, int port, bool enable) { struct bcm_sf2_priv *priv = ds_to_priv(ds); u32 reg; reg = core_readl(priv, CORE_EEE_EN_CTRL); if (enable) reg |= 1 << port; else reg &= ~(1 << port); core_writel(priv, reg, CORE_EEE_EN_CTRL); } static void bcm_sf2_gphy_enable_set(struct dsa_switch *ds, bool enable) { struct bcm_sf2_priv *priv = ds_to_priv(ds); u32 reg; reg = reg_readl(priv, REG_SPHY_CNTRL); if (enable) { reg |= PHY_RESET; reg &= ~(EXT_PWR_DOWN | IDDQ_BIAS | CK25_DIS); reg_writel(priv, reg, REG_SPHY_CNTRL); udelay(21); reg = reg_readl(priv, REG_SPHY_CNTRL); reg &= ~PHY_RESET; } else { reg |= EXT_PWR_DOWN | IDDQ_BIAS | PHY_RESET; reg_writel(priv, reg, REG_SPHY_CNTRL); mdelay(1); reg |= CK25_DIS; } reg_writel(priv, reg, REG_SPHY_CNTRL); /* Use PHY-driven LED signaling */ if (!enable) { reg = reg_readl(priv, REG_LED_CNTRL(0)); reg |= SPDLNK_SRC_SEL; reg_writel(priv, reg, REG_LED_CNTRL(0)); } } static inline void bcm_sf2_port_intr_enable(struct bcm_sf2_priv *priv, int port) { unsigned int off; switch (port) { case 7: off = P7_IRQ_OFF; break; case 0: /* Port 0 interrupts are located on the first bank */ intrl2_0_mask_clear(priv, P_IRQ_MASK(P0_IRQ_OFF)); return; default: off = P_IRQ_OFF(port); break; } intrl2_1_mask_clear(priv, P_IRQ_MASK(off)); } static inline void bcm_sf2_port_intr_disable(struct bcm_sf2_priv *priv, int port) { unsigned int off; switch (port) { case 7: off = P7_IRQ_OFF; break; case 0: /* Port 0 interrupts are located on the first bank */ intrl2_0_mask_set(priv, P_IRQ_MASK(P0_IRQ_OFF)); intrl2_0_writel(priv, P_IRQ_MASK(P0_IRQ_OFF), INTRL2_CPU_CLEAR); return; default: off = P_IRQ_OFF(port); break; } intrl2_1_mask_set(priv, P_IRQ_MASK(off)); intrl2_1_writel(priv, P_IRQ_MASK(off), INTRL2_CPU_CLEAR); } static int bcm_sf2_port_setup(struct dsa_switch *ds, int port, struct phy_device *phy) { struct bcm_sf2_priv *priv = ds_to_priv(ds); s8 cpu_port = ds->dst[ds->index].cpu_port; u32 reg; /* Clear the memory power down */ reg = core_readl(priv, CORE_MEM_PSM_VDD_CTRL); reg &= ~P_TXQ_PSM_VDD(port); core_writel(priv, reg, CORE_MEM_PSM_VDD_CTRL); /* Clear the Rx and Tx disable bits and set to no spanning tree */ core_writel(priv, 0, CORE_G_PCTL_PORT(port)); /* Re-enable the GPHY and re-apply workarounds */ if (priv->int_phy_mask & 1 << port && priv->hw_params.num_gphy == 1) { bcm_sf2_gphy_enable_set(ds, true); if (phy) { /* if phy_stop() has been called before, phy * will be in halted state, and phy_start() * will call resume. * * the resume path does not configure back * autoneg settings, and since we hard reset * the phy manually here, we need to reset the * state machine also. */ phy->state = PHY_READY; phy_init_hw(phy); } } /* Enable MoCA port interrupts to get notified */ if (port == priv->moca_port) bcm_sf2_port_intr_enable(priv, port); /* Set this port, and only this one to be in the default VLAN, * if member of a bridge, restore its membership prior to * bringing down this port. */ reg = core_readl(priv, CORE_PORT_VLAN_CTL_PORT(port)); reg &= ~PORT_VLAN_CTRL_MASK; reg |= (1 << port); reg |= priv->port_sts[port].vlan_ctl_mask; core_writel(priv, reg, CORE_PORT_VLAN_CTL_PORT(port)); bcm_sf2_imp_vlan_setup(ds, cpu_port); /* If EEE was enabled, restore it */ if (priv->port_sts[port].eee.eee_enabled) bcm_sf2_eee_enable_set(ds, port, true); return 0; } static void bcm_sf2_port_disable(struct dsa_switch *ds, int port, struct phy_device *phy) { struct bcm_sf2_priv *priv = ds_to_priv(ds); u32 off, reg; if (priv->wol_ports_mask & (1 << port)) return; if (port == priv->moca_port) bcm_sf2_port_intr_disable(priv, port); if (priv->int_phy_mask & 1 << port && priv->hw_params.num_gphy == 1) bcm_sf2_gphy_enable_set(ds, false); if (dsa_is_cpu_port(ds, port)) off = CORE_IMP_CTL; else off = CORE_G_PCTL_PORT(port); reg = core_readl(priv, off); reg |= RX_DIS | TX_DIS; core_writel(priv, reg, off); /* Power down the port memory */ reg = core_readl(priv, CORE_MEM_PSM_VDD_CTRL); reg |= P_TXQ_PSM_VDD(port); core_writel(priv, reg, CORE_MEM_PSM_VDD_CTRL); } /* Returns 0 if EEE was not enabled, or 1 otherwise */ static int bcm_sf2_eee_init(struct dsa_switch *ds, int port, struct phy_device *phy) { struct bcm_sf2_priv *priv = ds_to_priv(ds); struct ethtool_eee *p = &priv->port_sts[port].eee; int ret; p->supported = (SUPPORTED_1000baseT_Full | SUPPORTED_100baseT_Full); ret = phy_init_eee(phy, 0); if (ret) return 0; bcm_sf2_eee_enable_set(ds, port, true); return 1; } static int bcm_sf2_sw_get_eee(struct dsa_switch *ds, int port, struct ethtool_eee *e) { struct bcm_sf2_priv *priv = ds_to_priv(ds); struct ethtool_eee *p = &priv->port_sts[port].eee; u32 reg; reg = core_readl(priv, CORE_EEE_LPI_INDICATE); e->eee_enabled = p->eee_enabled; e->eee_active = !!(reg & (1 << port)); return 0; } static int bcm_sf2_sw_set_eee(struct dsa_switch *ds, int port, struct phy_device *phydev, struct ethtool_eee *e) { struct bcm_sf2_priv *priv = ds_to_priv(ds); struct ethtool_eee *p = &priv->port_sts[port].eee; p->eee_enabled = e->eee_enabled; if (!p->eee_enabled) { bcm_sf2_eee_enable_set(ds, port, false); } else { p->eee_enabled = bcm_sf2_eee_init(ds, port, phydev); if (!p->eee_enabled) return -EOPNOTSUPP; } return 0; } /* Fast-ageing of ARL entries for a given port, equivalent to an ARL * flush for that port. */ static int bcm_sf2_sw_fast_age_port(struct dsa_switch *ds, int port) { struct bcm_sf2_priv *priv = ds_to_priv(ds); unsigned int timeout = 1000; u32 reg; core_writel(priv, port, CORE_FAST_AGE_PORT); reg = core_readl(priv, CORE_FAST_AGE_CTRL); reg |= EN_AGE_PORT | EN_AGE_DYNAMIC | FAST_AGE_STR_DONE; core_writel(priv, reg, CORE_FAST_AGE_CTRL); do { reg = core_readl(priv, CORE_FAST_AGE_CTRL); if (!(reg & FAST_AGE_STR_DONE)) break; cpu_relax(); } while (timeout--); if (!timeout) return -ETIMEDOUT; core_writel(priv, 0, CORE_FAST_AGE_CTRL); return 0; } static int bcm_sf2_sw_br_join(struct dsa_switch *ds, int port, struct net_device *bridge) { struct bcm_sf2_priv *priv = ds_to_priv(ds); unsigned int i; u32 reg, p_ctl; priv->port_sts[port].bridge_dev = bridge; p_ctl = core_readl(priv, CORE_PORT_VLAN_CTL_PORT(port)); for (i = 0; i < priv->hw_params.num_ports; i++) { if (priv->port_sts[i].bridge_dev != bridge) continue; /* Add this local port to the remote port VLAN control * membership and update the remote port bitmask */ reg = core_readl(priv, CORE_PORT_VLAN_CTL_PORT(i)); reg |= 1 << port; core_writel(priv, reg, CORE_PORT_VLAN_CTL_PORT(i)); priv->port_sts[i].vlan_ctl_mask = reg; p_ctl |= 1 << i; } /* Configure the local port VLAN control membership to include * remote ports and update the local port bitmask */ core_writel(priv, p_ctl, CORE_PORT_VLAN_CTL_PORT(port)); priv->port_sts[port].vlan_ctl_mask = p_ctl; return 0; } static void bcm_sf2_sw_br_leave(struct dsa_switch *ds, int port) { struct bcm_sf2_priv *priv = ds_to_priv(ds); struct net_device *bridge = priv->port_sts[port].bridge_dev; unsigned int i; u32 reg, p_ctl; p_ctl = core_readl(priv, CORE_PORT_VLAN_CTL_PORT(port)); for (i = 0; i < priv->hw_params.num_ports; i++) { /* Don't touch the remaining ports */ if (priv->port_sts[i].bridge_dev != bridge) continue; reg = core_readl(priv, CORE_PORT_VLAN_CTL_PORT(i)); reg &= ~(1 << port); core_writel(priv, reg, CORE_PORT_VLAN_CTL_PORT(i)); priv->port_sts[port].vlan_ctl_mask = reg; /* Prevent self removal to preserve isolation */ if (port != i) p_ctl &= ~(1 << i); } core_writel(priv, p_ctl, CORE_PORT_VLAN_CTL_PORT(port)); priv->port_sts[port].vlan_ctl_mask = p_ctl; priv->port_sts[port].bridge_dev = NULL; } static void bcm_sf2_sw_br_set_stp_state(struct dsa_switch *ds, int port, u8 state) { struct bcm_sf2_priv *priv = ds_to_priv(ds); u8 hw_state, cur_hw_state; u32 reg; reg = core_readl(priv, CORE_G_PCTL_PORT(port)); cur_hw_state = reg & (G_MISTP_STATE_MASK << G_MISTP_STATE_SHIFT); switch (state) { case BR_STATE_DISABLED: hw_state = G_MISTP_DIS_STATE; break; case BR_STATE_LISTENING: hw_state = G_MISTP_LISTEN_STATE; break; case BR_STATE_LEARNING: hw_state = G_MISTP_LEARN_STATE; break; case BR_STATE_FORWARDING: hw_state = G_MISTP_FWD_STATE; break; case BR_STATE_BLOCKING: hw_state = G_MISTP_BLOCK_STATE; break; default: pr_err("%s: invalid STP state: %d\n", __func__, state); return; } /* Fast-age ARL entries if we are moving a port from Learning or * Forwarding (cur_hw_state) state to Disabled, Blocking or Listening * state (hw_state) */ if (cur_hw_state != hw_state) { if (cur_hw_state >= G_MISTP_LEARN_STATE && hw_state <= G_MISTP_LISTEN_STATE) { if (bcm_sf2_sw_fast_age_port(ds, port)) { pr_err("%s: fast-ageing failed\n", __func__); return; } } } reg = core_readl(priv, CORE_G_PCTL_PORT(port)); reg &= ~(G_MISTP_STATE_MASK << G_MISTP_STATE_SHIFT); reg |= hw_state; core_writel(priv, reg, CORE_G_PCTL_PORT(port)); } /* Address Resolution Logic routines */ static int bcm_sf2_arl_op_wait(struct bcm_sf2_priv *priv) { unsigned int timeout = 10; u32 reg; do { reg = core_readl(priv, CORE_ARLA_RWCTL); if (!(reg & ARL_STRTDN)) return 0; usleep_range(1000, 2000); } while (timeout--); return -ETIMEDOUT; } static int bcm_sf2_arl_rw_op(struct bcm_sf2_priv *priv, unsigned int op) { u32 cmd; if (op > ARL_RW) return -EINVAL; cmd = core_readl(priv, CORE_ARLA_RWCTL); cmd &= ~IVL_SVL_SELECT; cmd |= ARL_STRTDN; if (op) cmd |= ARL_RW; else cmd &= ~ARL_RW; core_writel(priv, cmd, CORE_ARLA_RWCTL); return bcm_sf2_arl_op_wait(priv); } static int bcm_sf2_arl_read(struct bcm_sf2_priv *priv, u64 mac, u16 vid, struct bcm_sf2_arl_entry *ent, u8 *idx, bool is_valid) { unsigned int i; int ret; ret = bcm_sf2_arl_op_wait(priv); if (ret) return ret; /* Read the 4 bins */ for (i = 0; i < 4; i++) { u64 mac_vid; u32 fwd_entry; mac_vid = core_readq(priv, CORE_ARLA_MACVID_ENTRY(i)); fwd_entry = core_readl(priv, CORE_ARLA_FWD_ENTRY(i)); bcm_sf2_arl_to_entry(ent, mac_vid, fwd_entry); if (ent->is_valid && is_valid) { *idx = i; return 0; } /* This is the MAC we just deleted */ if (!is_valid && (mac_vid & mac)) return 0; } return -ENOENT; } static int bcm_sf2_arl_op(struct bcm_sf2_priv *priv, int op, int port, const unsigned char *addr, u16 vid, bool is_valid) { struct bcm_sf2_arl_entry ent; u32 fwd_entry; u64 mac, mac_vid = 0; u8 idx = 0; int ret; /* Convert the array into a 64-bit MAC */ mac = bcm_sf2_mac_to_u64(addr); /* Perform a read for the given MAC and VID */ core_writeq(priv, mac, CORE_ARLA_MAC); core_writel(priv, vid, CORE_ARLA_VID); /* Issue a read operation for this MAC */ ret = bcm_sf2_arl_rw_op(priv, 1); if (ret) return ret; ret = bcm_sf2_arl_read(priv, mac, vid, &ent, &idx, is_valid); /* If this is a read, just finish now */ if (op) return ret; /* We could not find a matching MAC, so reset to a new entry */ if (ret) { fwd_entry = 0; idx = 0; } memset(&ent, 0, sizeof(ent)); ent.port = port; ent.is_valid = is_valid; ent.vid = vid; ent.is_static = true; memcpy(ent.mac, addr, ETH_ALEN); bcm_sf2_arl_from_entry(&mac_vid, &fwd_entry, &ent); core_writeq(priv, mac_vid, CORE_ARLA_MACVID_ENTRY(idx)); core_writel(priv, fwd_entry, CORE_ARLA_FWD_ENTRY(idx)); ret = bcm_sf2_arl_rw_op(priv, 0); if (ret) return ret; /* Re-read the entry to check */ return bcm_sf2_arl_read(priv, mac, vid, &ent, &idx, is_valid); } static int bcm_sf2_sw_fdb_prepare(struct dsa_switch *ds, int port, const struct switchdev_obj_port_fdb *fdb, struct switchdev_trans *trans) { /* We do not need to do anything specific here yet */ return 0; } static void bcm_sf2_sw_fdb_add(struct dsa_switch *ds, int port, const struct switchdev_obj_port_fdb *fdb, struct switchdev_trans *trans) { struct bcm_sf2_priv *priv = ds_to_priv(ds); if (bcm_sf2_arl_op(priv, 0, port, fdb->addr, fdb->vid, true)) pr_err("%s: failed to add MAC address\n", __func__); } static int bcm_sf2_sw_fdb_del(struct dsa_switch *ds, int port, const struct switchdev_obj_port_fdb *fdb) { struct bcm_sf2_priv *priv = ds_to_priv(ds); return bcm_sf2_arl_op(priv, 0, port, fdb->addr, fdb->vid, false); } static int bcm_sf2_arl_search_wait(struct bcm_sf2_priv *priv) { unsigned timeout = 1000; u32 reg; do { reg = core_readl(priv, CORE_ARLA_SRCH_CTL); if (!(reg & ARLA_SRCH_STDN)) return 0; if (reg & ARLA_SRCH_VLID) return 0; usleep_range(1000, 2000); } while (timeout--); return -ETIMEDOUT; } static void bcm_sf2_arl_search_rd(struct bcm_sf2_priv *priv, u8 idx, struct bcm_sf2_arl_entry *ent) { u64 mac_vid; u32 fwd_entry; mac_vid = core_readq(priv, CORE_ARLA_SRCH_RSLT_MACVID(idx)); fwd_entry = core_readl(priv, CORE_ARLA_SRCH_RSLT(idx)); bcm_sf2_arl_to_entry(ent, mac_vid, fwd_entry); } static int bcm_sf2_sw_fdb_copy(struct net_device *dev, int port, const struct bcm_sf2_arl_entry *ent, struct switchdev_obj_port_fdb *fdb, int (*cb)(struct switchdev_obj *obj)) { if (!ent->is_valid) return 0; if (port != ent->port) return 0; ether_addr_copy(fdb->addr, ent->mac); fdb->vid = ent->vid; fdb->ndm_state = ent->is_static ? NUD_NOARP : NUD_REACHABLE; return cb(&fdb->obj); } static int bcm_sf2_sw_fdb_dump(struct dsa_switch *ds, int port, struct switchdev_obj_port_fdb *fdb, int (*cb)(struct switchdev_obj *obj)) { struct bcm_sf2_priv *priv = ds_to_priv(ds); struct net_device *dev = ds->ports[port]; struct bcm_sf2_arl_entry results[2]; unsigned int count = 0; int ret; /* Start search operation */ core_writel(priv, ARLA_SRCH_STDN, CORE_ARLA_SRCH_CTL); do { ret = bcm_sf2_arl_search_wait(priv); if (ret) return ret; /* Read both entries, then return their values back */ bcm_sf2_arl_search_rd(priv, 0, &results[0]); ret = bcm_sf2_sw_fdb_copy(dev, port, &results[0], fdb, cb); if (ret) return ret; bcm_sf2_arl_search_rd(priv, 1, &results[1]); ret = bcm_sf2_sw_fdb_copy(dev, port, &results[1], fdb, cb); if (ret) return ret; if (!results[0].is_valid && !results[1].is_valid) break; } while (count++ < CORE_ARLA_NUM_ENTRIES); return 0; } static irqreturn_t bcm_sf2_switch_0_isr(int irq, void *dev_id) { struct bcm_sf2_priv *priv = dev_id; priv->irq0_stat = intrl2_0_readl(priv, INTRL2_CPU_STATUS) & ~priv->irq0_mask; intrl2_0_writel(priv, priv->irq0_stat, INTRL2_CPU_CLEAR); return IRQ_HANDLED; } static irqreturn_t bcm_sf2_switch_1_isr(int irq, void *dev_id) { struct bcm_sf2_priv *priv = dev_id; priv->irq1_stat = intrl2_1_readl(priv, INTRL2_CPU_STATUS) & ~priv->irq1_mask; intrl2_1_writel(priv, priv->irq1_stat, INTRL2_CPU_CLEAR); if (priv->irq1_stat & P_LINK_UP_IRQ(P7_IRQ_OFF)) priv->port_sts[7].link = 1; if (priv->irq1_stat & P_LINK_DOWN_IRQ(P7_IRQ_OFF)) priv->port_sts[7].link = 0; return IRQ_HANDLED; } static int bcm_sf2_sw_rst(struct bcm_sf2_priv *priv) { unsigned int timeout = 1000; u32 reg; reg = core_readl(priv, CORE_WATCHDOG_CTRL); reg |= SOFTWARE_RESET | EN_CHIP_RST | EN_SW_RESET; core_writel(priv, reg, CORE_WATCHDOG_CTRL); do { reg = core_readl(priv, CORE_WATCHDOG_CTRL); if (!(reg & SOFTWARE_RESET)) break; usleep_range(1000, 2000); } while (timeout-- > 0); if (timeout == 0) return -ETIMEDOUT; return 0; } static void bcm_sf2_intr_disable(struct bcm_sf2_priv *priv) { intrl2_0_writel(priv, 0xffffffff, INTRL2_CPU_MASK_SET); intrl2_0_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR); intrl2_0_writel(priv, 0, INTRL2_CPU_MASK_CLEAR); intrl2_1_writel(priv, 0xffffffff, INTRL2_CPU_MASK_SET); intrl2_1_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR); intrl2_1_writel(priv, 0, INTRL2_CPU_MASK_CLEAR); } static void bcm_sf2_identify_ports(struct bcm_sf2_priv *priv, struct device_node *dn) { struct device_node *port; const char *phy_mode_str; int mode; unsigned int port_num; int ret; priv->moca_port = -1; for_each_available_child_of_node(dn, port) { if (of_property_read_u32(port, "reg", &port_num)) continue; /* Internal PHYs get assigned a specific 'phy-mode' property * value: "internal" to help flag them before MDIO probing * has completed, since they might be turned off at that * time */ mode = of_get_phy_mode(port); if (mode < 0) { ret = of_property_read_string(port, "phy-mode", &phy_mode_str); if (ret < 0) continue; if (!strcasecmp(phy_mode_str, "internal")) priv->int_phy_mask |= 1 << port_num; } if (mode == PHY_INTERFACE_MODE_MOCA) priv->moca_port = port_num; } } static int bcm_sf2_sw_setup(struct dsa_switch *ds) { const char *reg_names[BCM_SF2_REGS_NUM] = BCM_SF2_REGS_NAME; struct bcm_sf2_priv *priv = ds_to_priv(ds); struct device_node *dn; void __iomem **base; unsigned int port; unsigned int i; u32 reg, rev; int ret; spin_lock_init(&priv->indir_lock); mutex_init(&priv->stats_mutex); /* All the interesting properties are at the parent device_node * level */ dn = ds->pd->of_node->parent; bcm_sf2_identify_ports(priv, ds->pd->of_node); priv->irq0 = irq_of_parse_and_map(dn, 0); priv->irq1 = irq_of_parse_and_map(dn, 1); base = &priv->core; for (i = 0; i < BCM_SF2_REGS_NUM; i++) { *base = of_iomap(dn, i); if (*base == NULL) { pr_err("unable to find register: %s\n", reg_names[i]); ret = -ENOMEM; goto out_unmap; } base++; } ret = bcm_sf2_sw_rst(priv); if (ret) { pr_err("unable to software reset switch: %d\n", ret); goto out_unmap; } /* Disable all interrupts and request them */ bcm_sf2_intr_disable(priv); ret = request_irq(priv->irq0, bcm_sf2_switch_0_isr, 0, "switch_0", priv); if (ret < 0) { pr_err("failed to request switch_0 IRQ\n"); goto out_unmap; } ret = request_irq(priv->irq1, bcm_sf2_switch_1_isr, 0, "switch_1", priv); if (ret < 0) { pr_err("failed to request switch_1 IRQ\n"); goto out_free_irq0; } /* Reset the MIB counters */ reg = core_readl(priv, CORE_GMNCFGCFG); reg |= RST_MIB_CNT; core_writel(priv, reg, CORE_GMNCFGCFG); reg &= ~RST_MIB_CNT; core_writel(priv, reg, CORE_GMNCFGCFG); /* Get the maximum number of ports for this switch */ priv->hw_params.num_ports = core_readl(priv, CORE_IMP0_PRT_ID) + 1; if (priv->hw_params.num_ports > DSA_MAX_PORTS) priv->hw_params.num_ports = DSA_MAX_PORTS; /* Assume a single GPHY setup if we can't read that property */ if (of_property_read_u32(dn, "brcm,num-gphy", &priv->hw_params.num_gphy)) priv->hw_params.num_gphy = 1; /* Enable all valid ports and disable those unused */ for (port = 0; port < priv->hw_params.num_ports; port++) { /* IMP port receives special treatment */ if ((1 << port) & ds->phys_port_mask) bcm_sf2_port_setup(ds, port, NULL); else if (dsa_is_cpu_port(ds, port)) bcm_sf2_imp_setup(ds, port); else bcm_sf2_port_disable(ds, port, NULL); } /* Include the pseudo-PHY address and the broadcast PHY address to * divert reads towards our workaround. This is only required for * 7445D0, since 7445E0 disconnects the internal switch pseudo-PHY such * that we can use the regular SWITCH_MDIO master controller instead. * * By default, DSA initializes ds->phys_mii_mask to ds->phys_port_mask * to have a 1:1 mapping between Port address and PHY address in order * to utilize the slave_mii_bus instance to read from Port PHYs. This is * not what we want here, so we initialize phys_mii_mask 0 to always * utilize the "master" MDIO bus backed by the "mdio-unimac" driver. */ if (of_machine_is_compatible("brcm,bcm7445d0")) ds->phys_mii_mask |= ((1 << BRCM_PSEUDO_PHY_ADDR) | (1 << 0)); else ds->phys_mii_mask = 0; rev = reg_readl(priv, REG_SWITCH_REVISION); priv->hw_params.top_rev = (rev >> SWITCH_TOP_REV_SHIFT) & SWITCH_TOP_REV_MASK; priv->hw_params.core_rev = (rev & SF2_REV_MASK); rev = reg_readl(priv, REG_PHY_REVISION); priv->hw_params.gphy_rev = rev & PHY_REVISION_MASK; pr_info("Starfighter 2 top: %x.%02x, core: %x.%02x base: 0x%p, IRQs: %d, %d\n", priv->hw_params.top_rev >> 8, priv->hw_params.top_rev & 0xff, priv->hw_params.core_rev >> 8, priv->hw_params.core_rev & 0xff, priv->core, priv->irq0, priv->irq1); return 0; out_free_irq0: free_irq(priv->irq0, priv); out_unmap: base = &priv->core; for (i = 0; i < BCM_SF2_REGS_NUM; i++) { if (*base) iounmap(*base); base++; } return ret; } static int bcm_sf2_sw_set_addr(struct dsa_switch *ds, u8 *addr) { return 0; } static u32 bcm_sf2_sw_get_phy_flags(struct dsa_switch *ds, int port) { struct bcm_sf2_priv *priv = ds_to_priv(ds); /* The BCM7xxx PHY driver expects to find the integrated PHY revision * in bits 15:8 and the patch level in bits 7:0 which is exactly what * the REG_PHY_REVISION register layout is. */ return priv->hw_params.gphy_rev; } static int bcm_sf2_sw_indir_rw(struct dsa_switch *ds, int op, int addr, int regnum, u16 val) { struct bcm_sf2_priv *priv = ds_to_priv(ds); int ret = 0; u32 reg; reg = reg_readl(priv, REG_SWITCH_CNTRL); reg |= MDIO_MASTER_SEL; reg_writel(priv, reg, REG_SWITCH_CNTRL); /* Page << 8 | offset */ reg = 0x70; reg <<= 2; core_writel(priv, addr, reg); /* Page << 8 | offset */ reg = 0x80 << 8 | regnum << 1; reg <<= 2; if (op) ret = core_readl(priv, reg); else core_writel(priv, val, reg); reg = reg_readl(priv, REG_SWITCH_CNTRL); reg &= ~MDIO_MASTER_SEL; reg_writel(priv, reg, REG_SWITCH_CNTRL); return ret & 0xffff; } static int bcm_sf2_sw_phy_read(struct dsa_switch *ds, int addr, int regnum) { /* Intercept reads from the MDIO broadcast address or Broadcom * pseudo-PHY address */ switch (addr) { case 0: case BRCM_PSEUDO_PHY_ADDR: return bcm_sf2_sw_indir_rw(ds, 1, addr, regnum, 0); default: return 0xffff; } } static int bcm_sf2_sw_phy_write(struct dsa_switch *ds, int addr, int regnum, u16 val) { /* Intercept writes to the MDIO broadcast address or Broadcom * pseudo-PHY address */ switch (addr) { case 0: case BRCM_PSEUDO_PHY_ADDR: bcm_sf2_sw_indir_rw(ds, 0, addr, regnum, val); break; } return 0; } static void bcm_sf2_sw_adjust_link(struct dsa_switch *ds, int port, struct phy_device *phydev) { struct bcm_sf2_priv *priv = ds_to_priv(ds); u32 id_mode_dis = 0, port_mode; const char *str = NULL; u32 reg; switch (phydev->interface) { case PHY_INTERFACE_MODE_RGMII: str = "RGMII (no delay)"; id_mode_dis = 1; case PHY_INTERFACE_MODE_RGMII_TXID: if (!str) str = "RGMII (TX delay)"; port_mode = EXT_GPHY; break; case PHY_INTERFACE_MODE_MII: str = "MII"; port_mode = EXT_EPHY; break; case PHY_INTERFACE_MODE_REVMII: str = "Reverse MII"; port_mode = EXT_REVMII; break; default: /* All other PHYs: internal and MoCA */ goto force_link; } /* If the link is down, just disable the interface to conserve power */ if (!phydev->link) { reg = reg_readl(priv, REG_RGMII_CNTRL_P(port)); reg &= ~RGMII_MODE_EN; reg_writel(priv, reg, REG_RGMII_CNTRL_P(port)); goto force_link; } /* Clear id_mode_dis bit, and the existing port mode, but * make sure we enable the RGMII block for data to pass */ reg = reg_readl(priv, REG_RGMII_CNTRL_P(port)); reg &= ~ID_MODE_DIS; reg &= ~(PORT_MODE_MASK << PORT_MODE_SHIFT); reg &= ~(RX_PAUSE_EN | TX_PAUSE_EN); reg |= port_mode | RGMII_MODE_EN; if (id_mode_dis) reg |= ID_MODE_DIS; if (phydev->pause) { if (phydev->asym_pause) reg |= TX_PAUSE_EN; reg |= RX_PAUSE_EN; } reg_writel(priv, reg, REG_RGMII_CNTRL_P(port)); pr_info("Port %d configured for %s\n", port, str); force_link: /* Force link settings detected from the PHY */ reg = SW_OVERRIDE; switch (phydev->speed) { case SPEED_1000: reg |= SPDSTS_1000 << SPEED_SHIFT; break; case SPEED_100: reg |= SPDSTS_100 << SPEED_SHIFT; break; } if (phydev->link) reg |= LINK_STS; if (phydev->duplex == DUPLEX_FULL) reg |= DUPLX_MODE; core_writel(priv, reg, CORE_STS_OVERRIDE_GMIIP_PORT(port)); } static void bcm_sf2_sw_fixed_link_update(struct dsa_switch *ds, int port, struct fixed_phy_status *status) { struct bcm_sf2_priv *priv = ds_to_priv(ds); u32 duplex, pause; u32 reg; duplex = core_readl(priv, CORE_DUPSTS); pause = core_readl(priv, CORE_PAUSESTS); status->link = 0; /* MoCA port is special as we do not get link status from CORE_LNKSTS, * which means that we need to force the link at the port override * level to get the data to flow. We do use what the interrupt handler * did determine before. * * For the other ports, we just force the link status, since this is * a fixed PHY device. */ if (port == priv->moca_port) { status->link = priv->port_sts[port].link; /* For MoCA interfaces, also force a link down notification * since some version of the user-space daemon (mocad) use * cmd->autoneg to force the link, which messes up the PHY * state machine and make it go in PHY_FORCING state instead. */ if (!status->link) netif_carrier_off(ds->ports[port]); status->duplex = 1; } else { status->link = 1; status->duplex = !!(duplex & (1 << port)); } reg = core_readl(priv, CORE_STS_OVERRIDE_GMIIP_PORT(port)); reg |= SW_OVERRIDE; if (status->link) reg |= LINK_STS; else reg &= ~LINK_STS; core_writel(priv, reg, CORE_STS_OVERRIDE_GMIIP_PORT(port)); if ((pause & (1 << port)) && (pause & (1 << (port + PAUSESTS_TX_PAUSE_SHIFT)))) { status->asym_pause = 1; status->pause = 1; } if (pause & (1 << port)) status->pause = 1; } static int bcm_sf2_sw_suspend(struct dsa_switch *ds) { struct bcm_sf2_priv *priv = ds_to_priv(ds); unsigned int port; bcm_sf2_intr_disable(priv); /* Disable all ports physically present including the IMP * port, the other ones have already been disabled during * bcm_sf2_sw_setup */ for (port = 0; port < DSA_MAX_PORTS; port++) { if ((1 << port) & ds->phys_port_mask || dsa_is_cpu_port(ds, port)) bcm_sf2_port_disable(ds, port, NULL); } return 0; } static int bcm_sf2_sw_resume(struct dsa_switch *ds) { struct bcm_sf2_priv *priv = ds_to_priv(ds); unsigned int port; int ret; ret = bcm_sf2_sw_rst(priv); if (ret) { pr_err("%s: failed to software reset switch\n", __func__); return ret; } if (priv->hw_params.num_gphy == 1) bcm_sf2_gphy_enable_set(ds, true); for (port = 0; port < DSA_MAX_PORTS; port++) { if ((1 << port) & ds->phys_port_mask) bcm_sf2_port_setup(ds, port, NULL); else if (dsa_is_cpu_port(ds, port)) bcm_sf2_imp_setup(ds, port); } return 0; } static void bcm_sf2_sw_get_wol(struct dsa_switch *ds, int port, struct ethtool_wolinfo *wol) { struct net_device *p = ds->dst[ds->index].master_netdev; struct bcm_sf2_priv *priv = ds_to_priv(ds); struct ethtool_wolinfo pwol; /* Get the parent device WoL settings */ p->ethtool_ops->get_wol(p, &pwol); /* Advertise the parent device supported settings */ wol->supported = pwol.supported; memset(&wol->sopass, 0, sizeof(wol->sopass)); if (pwol.wolopts & WAKE_MAGICSECURE) memcpy(&wol->sopass, pwol.sopass, sizeof(wol->sopass)); if (priv->wol_ports_mask & (1 << port)) wol->wolopts = pwol.wolopts; else wol->wolopts = 0; } static int bcm_sf2_sw_set_wol(struct dsa_switch *ds, int port, struct ethtool_wolinfo *wol) { struct net_device *p = ds->dst[ds->index].master_netdev; struct bcm_sf2_priv *priv = ds_to_priv(ds); s8 cpu_port = ds->dst[ds->index].cpu_port; struct ethtool_wolinfo pwol; p->ethtool_ops->get_wol(p, &pwol); if (wol->wolopts & ~pwol.supported) return -EINVAL; if (wol->wolopts) priv->wol_ports_mask |= (1 << port); else priv->wol_ports_mask &= ~(1 << port); /* If we have at least one port enabled, make sure the CPU port * is also enabled. If the CPU port is the last one enabled, we disable * it since this configuration does not make sense. */ if (priv->wol_ports_mask && priv->wol_ports_mask != (1 << cpu_port)) priv->wol_ports_mask |= (1 << cpu_port); else priv->wol_ports_mask &= ~(1 << cpu_port); return p->ethtool_ops->set_wol(p, wol); } static struct dsa_switch_driver bcm_sf2_switch_driver = { .tag_protocol = DSA_TAG_PROTO_BRCM, .probe = bcm_sf2_sw_drv_probe, .setup = bcm_sf2_sw_setup, .set_addr = bcm_sf2_sw_set_addr, .get_phy_flags = bcm_sf2_sw_get_phy_flags, .phy_read = bcm_sf2_sw_phy_read, .phy_write = bcm_sf2_sw_phy_write, .get_strings = bcm_sf2_sw_get_strings, .get_ethtool_stats = bcm_sf2_sw_get_ethtool_stats, .get_sset_count = bcm_sf2_sw_get_sset_count, .adjust_link = bcm_sf2_sw_adjust_link, .fixed_link_update = bcm_sf2_sw_fixed_link_update, .suspend = bcm_sf2_sw_suspend, .resume = bcm_sf2_sw_resume, .get_wol = bcm_sf2_sw_get_wol, .set_wol = bcm_sf2_sw_set_wol, .port_enable = bcm_sf2_port_setup, .port_disable = bcm_sf2_port_disable, .get_eee = bcm_sf2_sw_get_eee, .set_eee = bcm_sf2_sw_set_eee, .port_bridge_join = bcm_sf2_sw_br_join, .port_bridge_leave = bcm_sf2_sw_br_leave, .port_stp_state_set = bcm_sf2_sw_br_set_stp_state, .port_fdb_prepare = bcm_sf2_sw_fdb_prepare, .port_fdb_add = bcm_sf2_sw_fdb_add, .port_fdb_del = bcm_sf2_sw_fdb_del, .port_fdb_dump = bcm_sf2_sw_fdb_dump, }; static int __init bcm_sf2_init(void) { register_switch_driver(&bcm_sf2_switch_driver); return 0; } module_init(bcm_sf2_init); static void __exit bcm_sf2_exit(void) { unregister_switch_driver(&bcm_sf2_switch_driver); } module_exit(bcm_sf2_exit); MODULE_AUTHOR("Broadcom Corporation"); MODULE_DESCRIPTION("Driver for Broadcom Starfighter 2 ethernet switch chip"); MODULE_LICENSE("GPL"); MODULE_ALIAS("platform:brcm-sf2");