--- /dev/null
+/*
+ * 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 <linux/list.h>
+#include <linux/module.h>
+#include <linux/netdevice.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/of.h>
+#include <linux/phy.h>
+#include <linux/phy_fixed.h>
+#include <linux/mii.h>
+#include <linux/of.h>
+#include <linux/of_irq.h>
+#include <linux/of_address.h>
+#include <net/dsa.h>
+#include <linux/ethtool.h>
+#include <linux/if_bridge.h>
+
+#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_probe(struct device *host_dev, int sw_addr)
+{
+ 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 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 (port == 0 && 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 port 7 interrupts to get notified */
+ if (port == 7)
+ intrl2_1_mask_clear(priv, P_IRQ_MASK(P7_IRQ_OFF));
+
+ /* 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 == 7) {
+ intrl2_1_mask_set(priv, P_IRQ_MASK(P7_IRQ_OFF));
+ intrl2_1_writel(priv, P_IRQ_MASK(P7_IRQ_OFF), INTRL2_CPU_CLEAR);
+ }
+
+ if (port == 0 && 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 | 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;
+
+ return 0;
+}
+
+static int bcm_sf2_sw_br_join(struct dsa_switch *ds, int port,
+ u32 br_port_mask)
+{
+ struct bcm_sf2_priv *priv = ds_to_priv(ds);
+ 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++) {
+ if (!((1 << i) & br_port_mask))
+ 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 int bcm_sf2_sw_br_leave(struct dsa_switch *ds, int port,
+ u32 br_port_mask)
+{
+ struct bcm_sf2_priv *priv = ds_to_priv(ds);
+ 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 (!((1 << i) & br_port_mask))
+ 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;
+
+ return 0;
+}
+
+static int 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;
+ int ret = 0;
+ u32 reg;
+
+ reg = core_readl(priv, CORE_G_PCTL_PORT(port));
+ cur_hw_state = reg >> 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 -EINVAL;
+ }
+
+ /* Fast-age ARL entries if we are moving a port from Learning or
+ * Forwarding state to Disabled, Blocking or Listening state
+ */
+ if (cur_hw_state != hw_state) {
+ if (cur_hw_state & 4 && !(hw_state & 4)) {
+ ret = bcm_sf2_sw_fast_age_port(ds, port);
+ if (ret) {
+ pr_err("%s: fast-ageing failed\n", __func__);
+ return ret;
+ }
+ }
+ }
+
+ 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));
+
+ 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 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;
+
+ 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
+ */
+ ds->phys_mii_mask |= ((1 << 30) | (1 << 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 30:
+ 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 30:
+ 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, speed;
+ u32 reg;
+
+ duplex = core_readl(priv, CORE_DUPSTS);
+ pause = core_readl(priv, CORE_PAUSESTS);
+ speed = core_readl(priv, CORE_SPDSTS);
+
+ speed >>= (port * SPDSTS_SHIFT);
+ speed &= SPDSTS_MASK;
+
+ status->link = 0;
+
+ /* Port 7 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 == 7) {
+ status->link = priv->port_sts[port].link;
+ 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));
+
+ switch (speed) {
+ case SPDSTS_10:
+ status->speed = SPEED_10;
+ break;
+ case SPDSTS_100:
+ status->speed = SPEED_100;
+ break;
+ case SPDSTS_1000:
+ status->speed = SPEED_1000;
+ break;
+ }
+
+ 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,
+ .priv_size = sizeof(struct bcm_sf2_priv),
+ .probe = bcm_sf2_sw_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_join_bridge = bcm_sf2_sw_br_join,
+ .port_leave_bridge = bcm_sf2_sw_br_leave,
+ .port_stp_update = bcm_sf2_sw_br_set_stp_state,
+};
+
+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");
Code Review / kvmfornfv.git / blobdiff