/*
 * B53 switch driver main logic
 *
 * Copyright (C) 2011-2013 Jonas Gorski <jogo@openwrt.org>
 * Copyright (C) 2016 Florian Fainelli <f.fainelli@gmail.com>
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/delay.h>
#include <linux/export.h>
#include <linux/gpio.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/platform_data/b53.h>
#include <linux/phy.h>
#include <linux/etherdevice.h>
#include <linux/if_bridge.h>
#include <net/dsa.h>

#include "b53_regs.h"
#include "b53_priv.h"

struct b53_mib_desc {
        u8 size;
        u8 offset;
        const char *name;
};

/* BCM5365 MIB counters */
static const struct b53_mib_desc b53_mibs_65[] = {
        { 8, 0x00, "TxOctets" },
        { 4, 0x08, "TxDropPkts" },
        { 4, 0x10, "TxBroadcastPkts" },
        { 4, 0x14, "TxMulticastPkts" },
        { 4, 0x18, "TxUnicastPkts" },
        { 4, 0x1c, "TxCollisions" },
        { 4, 0x20, "TxSingleCollision" },
        { 4, 0x24, "TxMultipleCollision" },
        { 4, 0x28, "TxDeferredTransmit" },
        { 4, 0x2c, "TxLateCollision" },
        { 4, 0x30, "TxExcessiveCollision" },
        { 4, 0x38, "TxPausePkts" },
        { 8, 0x44, "RxOctets" },
        { 4, 0x4c, "RxUndersizePkts" },
        { 4, 0x50, "RxPausePkts" },
        { 4, 0x54, "Pkts64Octets" },
        { 4, 0x58, "Pkts65to127Octets" },
        { 4, 0x5c, "Pkts128to255Octets" },
        { 4, 0x60, "Pkts256to511Octets" },
        { 4, 0x64, "Pkts512to1023Octets" },
        { 4, 0x68, "Pkts1024to1522Octets" },
        { 4, 0x6c, "RxOversizePkts" },
        { 4, 0x70, "RxJabbers" },
        { 4, 0x74, "RxAlignmentErrors" },
        { 4, 0x78, "RxFCSErrors" },
        { 8, 0x7c, "RxGoodOctets" },
        { 4, 0x84, "RxDropPkts" },
        { 4, 0x88, "RxUnicastPkts" },
        { 4, 0x8c, "RxMulticastPkts" },
        { 4, 0x90, "RxBroadcastPkts" },
        { 4, 0x94, "RxSAChanges" },
        { 4, 0x98, "RxFragments" },
};

#define B53_MIBS_65_SIZE        ARRAY_SIZE(b53_mibs_65)

/* BCM63xx MIB counters */
static const struct b53_mib_desc b53_mibs_63xx[] = {
        { 8, 0x00, "TxOctets" },
        { 4, 0x08, "TxDropPkts" },
        { 4, 0x0c, "TxQoSPkts" },
        { 4, 0x10, "TxBroadcastPkts" },
        { 4, 0x14, "TxMulticastPkts" },
        { 4, 0x18, "TxUnicastPkts" },
        { 4, 0x1c, "TxCollisions" },
        { 4, 0x20, "TxSingleCollision" },
        { 4, 0x24, "TxMultipleCollision" },
        { 4, 0x28, "TxDeferredTransmit" },
        { 4, 0x2c, "TxLateCollision" },
        { 4, 0x30, "TxExcessiveCollision" },
        { 4, 0x38, "TxPausePkts" },
        { 8, 0x3c, "TxQoSOctets" },
        { 8, 0x44, "RxOctets" },
        { 4, 0x4c, "RxUndersizePkts" },
        { 4, 0x50, "RxPausePkts" },
        { 4, 0x54, "Pkts64Octets" },
        { 4, 0x58, "Pkts65to127Octets" },
        { 4, 0x5c, "Pkts128to255Octets" },
        { 4, 0x60, "Pkts256to511Octets" },
        { 4, 0x64, "Pkts512to1023Octets" },
        { 4, 0x68, "Pkts1024to1522Octets" },
        { 4, 0x6c, "RxOversizePkts" },
        { 4, 0x70, "RxJabbers" },
        { 4, 0x74, "RxAlignmentErrors" },
        { 4, 0x78, "RxFCSErrors" },
        { 8, 0x7c, "RxGoodOctets" },
        { 4, 0x84, "RxDropPkts" },
        { 4, 0x88, "RxUnicastPkts" },
        { 4, 0x8c, "RxMulticastPkts" },
        { 4, 0x90, "RxBroadcastPkts" },
        { 4, 0x94, "RxSAChanges" },
        { 4, 0x98, "RxFragments" },
        { 4, 0xa0, "RxSymbolErrors" },
        { 4, 0xa4, "RxQoSPkts" },
        { 8, 0xa8, "RxQoSOctets" },
        { 4, 0xb0, "Pkts1523to2047Octets" },
        { 4, 0xb4, "Pkts2048to4095Octets" },
        { 4, 0xb8, "Pkts4096to8191Octets" },
        { 4, 0xbc, "Pkts8192to9728Octets" },
        { 4, 0xc0, "RxDiscarded" },
};

#define B53_MIBS_63XX_SIZE      ARRAY_SIZE(b53_mibs_63xx)

/* MIB counters */
static const struct b53_mib_desc b53_mibs[] = {
        { 8, 0x00, "TxOctets" },
        { 4, 0x08, "TxDropPkts" },
        { 4, 0x10, "TxBroadcastPkts" },
        { 4, 0x14, "TxMulticastPkts" },
        { 4, 0x18, "TxUnicastPkts" },
        { 4, 0x1c, "TxCollisions" },
        { 4, 0x20, "TxSingleCollision" },
        { 4, 0x24, "TxMultipleCollision" },
        { 4, 0x28, "TxDeferredTransmit" },
        { 4, 0x2c, "TxLateCollision" },
        { 4, 0x30, "TxExcessiveCollision" },
        { 4, 0x38, "TxPausePkts" },
        { 8, 0x50, "RxOctets" },
        { 4, 0x58, "RxUndersizePkts" },
        { 4, 0x5c, "RxPausePkts" },
        { 4, 0x60, "Pkts64Octets" },
        { 4, 0x64, "Pkts65to127Octets" },
        { 4, 0x68, "Pkts128to255Octets" },
        { 4, 0x6c, "Pkts256to511Octets" },
        { 4, 0x70, "Pkts512to1023Octets" },
        { 4, 0x74, "Pkts1024to1522Octets" },
        { 4, 0x78, "RxOversizePkts" },
        { 4, 0x7c, "RxJabbers" },
        { 4, 0x80, "RxAlignmentErrors" },
        { 4, 0x84, "RxFCSErrors" },
        { 8, 0x88, "RxGoodOctets" },
        { 4, 0x90, "RxDropPkts" },
        { 4, 0x94, "RxUnicastPkts" },
        { 4, 0x98, "RxMulticastPkts" },
        { 4, 0x9c, "RxBroadcastPkts" },
        { 4, 0xa0, "RxSAChanges" },
        { 4, 0xa4, "RxFragments" },
        { 4, 0xa8, "RxJumboPkts" },
        { 4, 0xac, "RxSymbolErrors" },
        { 4, 0xc0, "RxDiscarded" },
};

#define B53_MIBS_SIZE   ARRAY_SIZE(b53_mibs)

static const struct b53_mib_desc b53_mibs_58xx[] = {
        { 8, 0x00, "TxOctets" },
        { 4, 0x08, "TxDropPkts" },
        { 4, 0x0c, "TxQPKTQ0" },
        { 4, 0x10, "TxBroadcastPkts" },
        { 4, 0x14, "TxMulticastPkts" },
        { 4, 0x18, "TxUnicastPKts" },
        { 4, 0x1c, "TxCollisions" },
        { 4, 0x20, "TxSingleCollision" },
        { 4, 0x24, "TxMultipleCollision" },
        { 4, 0x28, "TxDeferredCollision" },
        { 4, 0x2c, "TxLateCollision" },
        { 4, 0x30, "TxExcessiveCollision" },
        { 4, 0x34, "TxFrameInDisc" },
        { 4, 0x38, "TxPausePkts" },
        { 4, 0x3c, "TxQPKTQ1" },
        { 4, 0x40, "TxQPKTQ2" },
        { 4, 0x44, "TxQPKTQ3" },
        { 4, 0x48, "TxQPKTQ4" },
        { 4, 0x4c, "TxQPKTQ5" },
        { 8, 0x50, "RxOctets" },
        { 4, 0x58, "RxUndersizePkts" },
        { 4, 0x5c, "RxPausePkts" },
        { 4, 0x60, "RxPkts64Octets" },
        { 4, 0x64, "RxPkts65to127Octets" },
        { 4, 0x68, "RxPkts128to255Octets" },
        { 4, 0x6c, "RxPkts256to511Octets" },
        { 4, 0x70, "RxPkts512to1023Octets" },
        { 4, 0x74, "RxPkts1024toMaxPktsOctets" },
        { 4, 0x78, "RxOversizePkts" },
        { 4, 0x7c, "RxJabbers" },
        { 4, 0x80, "RxAlignmentErrors" },
        { 4, 0x84, "RxFCSErrors" },
        { 8, 0x88, "RxGoodOctets" },
        { 4, 0x90, "RxDropPkts" },
        { 4, 0x94, "RxUnicastPkts" },
        { 4, 0x98, "RxMulticastPkts" },
        { 4, 0x9c, "RxBroadcastPkts" },
        { 4, 0xa0, "RxSAChanges" },
        { 4, 0xa4, "RxFragments" },
        { 4, 0xa8, "RxJumboPkt" },
        { 4, 0xac, "RxSymblErr" },
        { 4, 0xb0, "InRangeErrCount" },
        { 4, 0xb4, "OutRangeErrCount" },
        { 4, 0xb8, "EEELpiEvent" },
        { 4, 0xbc, "EEELpiDuration" },
        { 4, 0xc0, "RxDiscard" },
        { 4, 0xc8, "TxQPKTQ6" },
        { 4, 0xcc, "TxQPKTQ7" },
        { 4, 0xd0, "TxPkts64Octets" },
        { 4, 0xd4, "TxPkts65to127Octets" },
        { 4, 0xd8, "TxPkts128to255Octets" },
        { 4, 0xdc, "TxPkts256to511Ocets" },
        { 4, 0xe0, "TxPkts512to1023Ocets" },
        { 4, 0xe4, "TxPkts1024toMaxPktOcets" },
};

#define B53_MIBS_58XX_SIZE      ARRAY_SIZE(b53_mibs_58xx)

static int b53_do_vlan_op(struct b53_device *dev, u8 op)
{
        unsigned int i;

        b53_write8(dev, B53_ARLIO_PAGE, dev->vta_regs[0], VTA_START_CMD | op);

        for (i = 0; i < 10; i++) {
                u8 vta;

                b53_read8(dev, B53_ARLIO_PAGE, dev->vta_regs[0], &vta);
                if (!(vta & VTA_START_CMD))
                        return 0;

                usleep_range(100, 200);
        }

        return -EIO;
}

static void b53_set_vlan_entry(struct b53_device *dev, u16 vid,
                               struct b53_vlan *vlan)
{
        if (is5325(dev)) {
                u32 entry = 0;

                if (vlan->members) {
                        entry = ((vlan->untag & VA_UNTAG_MASK_25) <<
                                 VA_UNTAG_S_25) | vlan->members;
                        if (dev->core_rev >= 3)
                                entry |= VA_VALID_25_R4 | vid << VA_VID_HIGH_S;
                        else
                                entry |= VA_VALID_25;
                }

                b53_write32(dev, B53_VLAN_PAGE, B53_VLAN_WRITE_25, entry);
                b53_write16(dev, B53_VLAN_PAGE, B53_VLAN_TABLE_ACCESS_25, vid |
                            VTA_RW_STATE_WR | VTA_RW_OP_EN);
        } else if (is5365(dev)) {
                u16 entry = 0;

                if (vlan->members)
                        entry = ((vlan->untag & VA_UNTAG_MASK_65) <<
                                 VA_UNTAG_S_65) | vlan->members | VA_VALID_65;

                b53_write16(dev, B53_VLAN_PAGE, B53_VLAN_WRITE_65, entry);
                b53_write16(dev, B53_VLAN_PAGE, B53_VLAN_TABLE_ACCESS_65, vid |
                            VTA_RW_STATE_WR | VTA_RW_OP_EN);
        } else {
                b53_write16(dev, B53_ARLIO_PAGE, dev->vta_regs[1], vid);
                b53_write32(dev, B53_ARLIO_PAGE, dev->vta_regs[2],
                            (vlan->untag << VTE_UNTAG_S) | vlan->members);

                b53_do_vlan_op(dev, VTA_CMD_WRITE);
        }

        dev_dbg(dev->ds->dev, "VID: %d, members: 0x%04x, untag: 0x%04x\n",
                vid, vlan->members, vlan->untag);
}

static void b53_get_vlan_entry(struct b53_device *dev, u16 vid,
                               struct b53_vlan *vlan)
{
        if (is5325(dev)) {
                u32 entry = 0;

                b53_write16(dev, B53_VLAN_PAGE, B53_VLAN_TABLE_ACCESS_25, vid |
                            VTA_RW_STATE_RD | VTA_RW_OP_EN);
                b53_read32(dev, B53_VLAN_PAGE, B53_VLAN_WRITE_25, &entry);

                if (dev->core_rev >= 3)
                        vlan->valid = !!(entry & VA_VALID_25_R4);
                else
                        vlan->valid = !!(entry & VA_VALID_25);
                vlan->members = entry & VA_MEMBER_MASK;
                vlan->untag = (entry >> VA_UNTAG_S_25) & VA_UNTAG_MASK_25;

        } else if (is5365(dev)) {
                u16 entry = 0;

                b53_write16(dev, B53_VLAN_PAGE, B53_VLAN_TABLE_ACCESS_65, vid |
                            VTA_RW_STATE_WR | VTA_RW_OP_EN);
                b53_read16(dev, B53_VLAN_PAGE, B53_VLAN_WRITE_65, &entry);

                vlan->valid = !!(entry & VA_VALID_65);
                vlan->members = entry & VA_MEMBER_MASK;
                vlan->untag = (entry >> VA_UNTAG_S_65) & VA_UNTAG_MASK_65;
        } else {
                u32 entry = 0;

                b53_write16(dev, B53_ARLIO_PAGE, dev->vta_regs[1], vid);
                b53_do_vlan_op(dev, VTA_CMD_READ);
                b53_read32(dev, B53_ARLIO_PAGE, dev->vta_regs[2], &entry);
                vlan->members = entry & VTE_MEMBERS;
                vlan->untag = (entry >> VTE_UNTAG_S) & VTE_MEMBERS;
                vlan->valid = true;
        }
}

static void b53_set_forwarding(struct b53_device *dev, int enable)
{
        u8 mgmt;

        b53_read8(dev, B53_CTRL_PAGE, B53_SWITCH_MODE, &mgmt);

        if (enable)
                mgmt |= SM_SW_FWD_EN;
        else
                mgmt &= ~SM_SW_FWD_EN;

        b53_write8(dev, B53_CTRL_PAGE, B53_SWITCH_MODE, mgmt);

        /* Include IMP port in dumb forwarding mode
         */
        b53_read8(dev, B53_CTRL_PAGE, B53_SWITCH_CTRL, &mgmt);
        mgmt |= B53_MII_DUMB_FWDG_EN;
        b53_write8(dev, B53_CTRL_PAGE, B53_SWITCH_CTRL, mgmt);
}

static void b53_enable_vlan(struct b53_device *dev, bool enable)
{
        u8 mgmt, vc0, vc1, vc4 = 0, vc5;

        b53_read8(dev, B53_CTRL_PAGE, B53_SWITCH_MODE, &mgmt);
        b53_read8(dev, B53_VLAN_PAGE, B53_VLAN_CTRL0, &vc0);
        b53_read8(dev, B53_VLAN_PAGE, B53_VLAN_CTRL1, &vc1);

        if (is5325(dev) || is5365(dev)) {
                b53_read8(dev, B53_VLAN_PAGE, B53_VLAN_CTRL4_25, &vc4);
                b53_read8(dev, B53_VLAN_PAGE, B53_VLAN_CTRL5_25, &vc5);
        } else if (is63xx(dev)) {
                b53_read8(dev, B53_VLAN_PAGE, B53_VLAN_CTRL4_63XX, &vc4);
                b53_read8(dev, B53_VLAN_PAGE, B53_VLAN_CTRL5_63XX, &vc5);
        } else {
                b53_read8(dev, B53_VLAN_PAGE, B53_VLAN_CTRL4, &vc4);
                b53_read8(dev, B53_VLAN_PAGE, B53_VLAN_CTRL5, &vc5);
        }

        mgmt &= ~SM_SW_FWD_MODE;

        if (enable) {
                vc0 |= VC0_VLAN_EN | VC0_VID_CHK_EN | VC0_VID_HASH_VID;
                vc1 |= VC1_RX_MCST_UNTAG_EN | VC1_RX_MCST_FWD_EN;
                vc4 &= ~VC4_ING_VID_CHECK_MASK;
                vc4 |= VC4_ING_VID_VIO_DROP << VC4_ING_VID_CHECK_S;
                vc5 |= VC5_DROP_VTABLE_MISS;

                if (is5325(dev))
                        vc0 &= ~VC0_RESERVED_1;

                if (is5325(dev) || is5365(dev))
                        vc1 |= VC1_RX_MCST_TAG_EN;

        } else {
                vc0 &= ~(VC0_VLAN_EN | VC0_VID_CHK_EN | VC0_VID_HASH_VID);
                vc1 &= ~(VC1_RX_MCST_UNTAG_EN | VC1_RX_MCST_FWD_EN);
                vc4 &= ~VC4_ING_VID_CHECK_MASK;
                vc5 &= ~VC5_DROP_VTABLE_MISS;

                if (is5325(dev) || is5365(dev))
                        vc4 |= VC4_ING_VID_VIO_FWD << VC4_ING_VID_CHECK_S;
                else
                        vc4 |= VC4_ING_VID_VIO_TO_IMP << VC4_ING_VID_CHECK_S;

                if (is5325(dev) || is5365(dev))
                        vc1 &= ~VC1_RX_MCST_TAG_EN;
        }

        if (!is5325(dev) && !is5365(dev))
                vc5 &= ~VC5_VID_FFF_EN;

        b53_write8(dev, B53_VLAN_PAGE, B53_VLAN_CTRL0, vc0);
        b53_write8(dev, B53_VLAN_PAGE, B53_VLAN_CTRL1, vc1);

        if (is5325(dev) || is5365(dev)) {
                /* enable the high 8 bit vid check on 5325 */
                if (is5325(dev) && enable)
                        b53_write8(dev, B53_VLAN_PAGE, B53_VLAN_CTRL3,
                                   VC3_HIGH_8BIT_EN);
                else
                        b53_write8(dev, B53_VLAN_PAGE, B53_VLAN_CTRL3, 0);

                b53_write8(dev, B53_VLAN_PAGE, B53_VLAN_CTRL4_25, vc4);
                b53_write8(dev, B53_VLAN_PAGE, B53_VLAN_CTRL5_25, vc5);
        } else if (is63xx(dev)) {
                b53_write16(dev, B53_VLAN_PAGE, B53_VLAN_CTRL3_63XX, 0);
                b53_write8(dev, B53_VLAN_PAGE, B53_VLAN_CTRL4_63XX, vc4);
                b53_write8(dev, B53_VLAN_PAGE, B53_VLAN_CTRL5_63XX, vc5);
        } else {
                b53_write16(dev, B53_VLAN_PAGE, B53_VLAN_CTRL3, 0);
                b53_write8(dev, B53_VLAN_PAGE, B53_VLAN_CTRL4, vc4);
                b53_write8(dev, B53_VLAN_PAGE, B53_VLAN_CTRL5, vc5);
        }

        b53_write8(dev, B53_CTRL_PAGE, B53_SWITCH_MODE, mgmt);
}

static int b53_set_jumbo(struct b53_device *dev, bool enable, bool allow_10_100)
{
        u32 port_mask = 0;
        u16 max_size = JMS_MIN_SIZE;

        if (is5325(dev) || is5365(dev))
                return -EINVAL;

        if (enable) {
                port_mask = dev->enabled_ports;
                max_size = JMS_MAX_SIZE;
                if (allow_10_100)
                        port_mask |= JPM_10_100_JUMBO_EN;
        }

        b53_write32(dev, B53_JUMBO_PAGE, dev->jumbo_pm_reg, port_mask);
        return b53_write16(dev, B53_JUMBO_PAGE, dev->jumbo_size_reg, max_size);
}

static int b53_flush_arl(struct b53_device *dev, u8 mask)
{
        unsigned int i;

        b53_write8(dev, B53_CTRL_PAGE, B53_FAST_AGE_CTRL,
                   FAST_AGE_DONE | FAST_AGE_DYNAMIC | mask);

        for (i = 0; i < 10; i++) {
                u8 fast_age_ctrl;

                b53_read8(dev, B53_CTRL_PAGE, B53_FAST_AGE_CTRL,
                          &fast_age_ctrl);

                if (!(fast_age_ctrl & FAST_AGE_DONE))
                        goto out;

                msleep(1);
        }

        return -ETIMEDOUT;
out:
        /* Only age dynamic entries (default behavior) */
        b53_write8(dev, B53_CTRL_PAGE, B53_FAST_AGE_CTRL, FAST_AGE_DYNAMIC);
        return 0;
}

static int b53_fast_age_port(struct b53_device *dev, int port)
{
        b53_write8(dev, B53_CTRL_PAGE, B53_FAST_AGE_PORT_CTRL, port);

        return b53_flush_arl(dev, FAST_AGE_PORT);
}

static int b53_fast_age_vlan(struct b53_device *dev, u16 vid)
{
        b53_write16(dev, B53_CTRL_PAGE, B53_FAST_AGE_VID_CTRL, vid);

        return b53_flush_arl(dev, FAST_AGE_VLAN);
}

void b53_imp_vlan_setup(struct dsa_switch *ds, int cpu_port)
{
        struct b53_device *dev = ds->priv;
        unsigned int i;
        u16 pvlan;

        /* 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.
         */
        b53_for_each_port(dev, i) {
                b53_read16(dev, B53_PVLAN_PAGE, B53_PVLAN_PORT_MASK(i), &pvlan);
                pvlan |= BIT(cpu_port);
                b53_write16(dev, B53_PVLAN_PAGE, B53_PVLAN_PORT_MASK(i), pvlan);
        }
}
EXPORT_SYMBOL(b53_imp_vlan_setup);

int b53_enable_port(struct dsa_switch *ds, int port, struct phy_device *phy)
{
        struct b53_device *dev = ds->priv;
        unsigned int cpu_port = ds->ports[port].cpu_dp->index;
        u16 pvlan;

        /* Clear the Rx and Tx disable bits and set to no spanning tree */
        b53_write8(dev, B53_CTRL_PAGE, B53_PORT_CTRL(port), 0);

        /* 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.
         */
        b53_read16(dev, B53_PVLAN_PAGE, B53_PVLAN_PORT_MASK(port), &pvlan);
        pvlan &= ~0x1ff;
        pvlan |= BIT(port);
        pvlan |= dev->ports[port].vlan_ctl_mask;
        b53_write16(dev, B53_PVLAN_PAGE, B53_PVLAN_PORT_MASK(port), pvlan);

        b53_imp_vlan_setup(ds, cpu_port);

        /* If EEE was enabled, restore it */
        if (dev->ports[port].eee.eee_enabled)
                b53_eee_enable_set(ds, port, true);

        return 0;
}
EXPORT_SYMBOL(b53_enable_port);

void b53_disable_port(struct dsa_switch *ds, int port, struct phy_device *phy)
{
        struct b53_device *dev = ds->priv;
        u8 reg;

        /* Disable Tx/Rx for the port */
        b53_read8(dev, B53_CTRL_PAGE, B53_PORT_CTRL(port), &reg);
        reg |= PORT_CTRL_RX_DISABLE | PORT_CTRL_TX_DISABLE;
        b53_write8(dev, B53_CTRL_PAGE, B53_PORT_CTRL(port), reg);
}
EXPORT_SYMBOL(b53_disable_port);

void b53_brcm_hdr_setup(struct dsa_switch *ds, int port)
{
        bool tag_en = !(ds->ops->get_tag_protocol(ds, port) ==
                         DSA_TAG_PROTO_NONE);
        struct b53_device *dev = ds->priv;
        u8 hdr_ctl, val;
        u16 reg;

        /* Resolve which bit controls the Broadcom tag */
        switch (port) {
        case 8:
                val = BRCM_HDR_P8_EN;
                break;
        case 7:
                val = BRCM_HDR_P7_EN;
                break;
        case 5:
                val = BRCM_HDR_P5_EN;
                break;
        default:
                val = 0;
                break;
        }

        /* Enable Broadcom tags for IMP port */
        b53_read8(dev, B53_MGMT_PAGE, B53_BRCM_HDR, &hdr_ctl);
        if (tag_en)
                hdr_ctl |= val;
        else
                hdr_ctl &= ~val;
        b53_write8(dev, B53_MGMT_PAGE, B53_BRCM_HDR, hdr_ctl);

        /* Registers below are only accessible on newer devices */
        if (!is58xx(dev))
                return;

        /* Enable reception Broadcom tag for CPU TX (switch RX) to
         * allow us to tag outgoing frames
         */
        b53_read16(dev, B53_MGMT_PAGE, B53_BRCM_HDR_RX_DIS, &reg);
        if (tag_en)
                reg &= ~BIT(port);
        else
                reg |= BIT(port);
        b53_write16(dev, B53_MGMT_PAGE, B53_BRCM_HDR_RX_DIS, reg);

        /* Enable transmission of Broadcom tags from the switch (CPU RX) to
         * allow delivering frames to the per-port net_devices
         */
        b53_read16(dev, B53_MGMT_PAGE, B53_BRCM_HDR_TX_DIS, &reg);
        if (tag_en)
                reg &= ~BIT(port);
        else
                reg |= BIT(port);
        b53_write16(dev, B53_MGMT_PAGE, B53_BRCM_HDR_TX_DIS, reg);
}
EXPORT_SYMBOL(b53_brcm_hdr_setup);

static void b53_enable_cpu_port(struct b53_device *dev, int port)
{
        u8 port_ctrl;

        /* BCM5325 CPU port is at 8 */
        if ((is5325(dev) || is5365(dev)) && port == B53_CPU_PORT_25)
                port = B53_CPU_PORT;

        port_ctrl = PORT_CTRL_RX_BCST_EN |
                    PORT_CTRL_RX_MCST_EN |
                    PORT_CTRL_RX_UCST_EN;
        b53_write8(dev, B53_CTRL_PAGE, B53_PORT_CTRL(port), port_ctrl);

        b53_brcm_hdr_setup(dev->ds, port);
}

static void b53_enable_mib(struct b53_device *dev)
{
        u8 gc;

        b53_read8(dev, B53_MGMT_PAGE, B53_GLOBAL_CONFIG, &gc);
        gc &= ~(GC_RESET_MIB | GC_MIB_AC_EN);
        b53_write8(dev, B53_MGMT_PAGE, B53_GLOBAL_CONFIG, gc);
}

int b53_configure_vlan(struct dsa_switch *ds)
{
        struct b53_device *dev = ds->priv;
        struct b53_vlan vl = { 0 };
        int i;

        /* clear all vlan entries */
        if (is5325(dev) || is5365(dev)) {
                for (i = 1; i < dev->num_vlans; i++)
                        b53_set_vlan_entry(dev, i, &vl);
        } else {
                b53_do_vlan_op(dev, VTA_CMD_CLEAR);
        }

        b53_enable_vlan(dev, false);

        b53_for_each_port(dev, i)
                b53_write16(dev, B53_VLAN_PAGE,
                            B53_VLAN_PORT_DEF_TAG(i), 1);

        if (!is5325(dev) && !is5365(dev))
                b53_set_jumbo(dev, dev->enable_jumbo, false);

        return 0;
}
EXPORT_SYMBOL(b53_configure_vlan);

static void b53_switch_reset_gpio(struct b53_device *dev)
{
        int gpio = dev->reset_gpio;

        if (gpio < 0)
                return;

        /* Reset sequence: RESET low(50ms)->high(20ms)
         */
        gpio_set_value(gpio, 0);
        mdelay(50);

        gpio_set_value(gpio, 1);
        mdelay(20);

        dev->current_page = 0xff;
}

static int b53_switch_reset(struct b53_device *dev)
{
        unsigned int timeout = 1000;
        u8 mgmt, reg;

        b53_switch_reset_gpio(dev);

        if (is539x(dev)) {
                b53_write8(dev, B53_CTRL_PAGE, B53_SOFTRESET, 0x83);
                b53_write8(dev, B53_CTRL_PAGE, B53_SOFTRESET, 0x00);
        }

        /* This is specific to 58xx devices here, do not use is58xx() which
         * covers the larger Starfigther 2 family, including 7445/7278 which
         * still use this driver as a library and need to perform the reset
         * earlier.
         */
        if (dev->chip_id == BCM58XX_DEVICE_ID ||
            dev->chip_id == BCM583XX_DEVICE_ID) {
                b53_read8(dev, B53_CTRL_PAGE, B53_SOFTRESET, &reg);
                reg |= SW_RST | EN_SW_RST | EN_CH_RST;
                b53_write8(dev, B53_CTRL_PAGE, B53_SOFTRESET, reg);

                do {
                        b53_read8(dev, B53_CTRL_PAGE, B53_SOFTRESET, &reg);
                        if (!(reg & SW_RST))
                                break;

                        usleep_range(1000, 2000);
                } while (timeout-- > 0);

                if (timeout == 0)
                        return -ETIMEDOUT;
        }

        b53_read8(dev, B53_CTRL_PAGE, B53_SWITCH_MODE, &mgmt);

        if (!(mgmt & SM_SW_FWD_EN)) {
                mgmt &= ~SM_SW_FWD_MODE;
                mgmt |= SM_SW_FWD_EN;

                b53_write8(dev, B53_CTRL_PAGE, B53_SWITCH_MODE, mgmt);
                b53_read8(dev, B53_CTRL_PAGE, B53_SWITCH_MODE, &mgmt);

                if (!(mgmt & SM_SW_FWD_EN)) {
                        dev_err(dev->dev, "Failed to enable switch!\n");
                        return -EINVAL;
                }
        }

        b53_enable_mib(dev);

        return b53_flush_arl(dev, FAST_AGE_STATIC);
}

static int b53_phy_read16(struct dsa_switch *ds, int addr, int reg)
{
        struct b53_device *priv = ds->priv;
        u16 value = 0;
        int ret;

        if (priv->ops->phy_read16)
                ret = priv->ops->phy_read16(priv, addr, reg, &value);
        else
                ret = b53_read16(priv, B53_PORT_MII_PAGE(addr),
                                 reg * 2, &value);

        return ret ? ret : value;
}

static int b53_phy_write16(struct dsa_switch *ds, int addr, int reg, u16 val)
{
        struct b53_device *priv = ds->priv;

        if (priv->ops->phy_write16)
                return priv->ops->phy_write16(priv, addr, reg, val);

        return b53_write16(priv, B53_PORT_MII_PAGE(addr), reg * 2, val);
}

static int b53_reset_switch(struct b53_device *priv)
{
        /* reset vlans */
        priv->enable_jumbo = false;

        memset(priv->vlans, 0, sizeof(*priv->vlans) * priv->num_vlans);
        memset(priv->ports, 0, sizeof(*priv->ports) * priv->num_ports);

        return b53_switch_reset(priv);
}

static int b53_apply_config(struct b53_device *priv)
{
        /* disable switching */
        b53_set_forwarding(priv, 0);

        b53_configure_vlan(priv->ds);

        /* enable switching */
        b53_set_forwarding(priv, 1);

        return 0;
}

static void b53_reset_mib(struct b53_device *priv)
{
        u8 gc;

        b53_read8(priv, B53_MGMT_PAGE, B53_GLOBAL_CONFIG, &gc);

        b53_write8(priv, B53_MGMT_PAGE, B53_GLOBAL_CONFIG, gc | GC_RESET_MIB);
        msleep(1);
        b53_write8(priv, B53_MGMT_PAGE, B53_GLOBAL_CONFIG, gc & ~GC_RESET_MIB);
        msleep(1);
}

static const struct b53_mib_desc *b53_get_mib(struct b53_device *dev)
{
        if (is5365(dev))
                return b53_mibs_65;
        else if (is63xx(dev))
                return b53_mibs_63xx;
        else if (is58xx(dev))
                return b53_mibs_58xx;
        else
                return b53_mibs;
}

static unsigned int b53_get_mib_size(struct b53_device *dev)
{
        if (is5365(dev))
                return B53_MIBS_65_SIZE;
        else if (is63xx(dev))
                return B53_MIBS_63XX_SIZE;
        else if (is58xx(dev))
                return B53_MIBS_58XX_SIZE;
        else
                return B53_MIBS_SIZE;
}

static struct phy_device *b53_get_phy_device(struct dsa_switch *ds, int port)
{
        /* These ports typically do not have built-in PHYs */
        switch (port) {
        case B53_CPU_PORT_25:
        case 7:
        case B53_CPU_PORT:
                return NULL;
        }

        return mdiobus_get_phy(ds->slave_mii_bus, port);
}

void b53_get_strings(struct dsa_switch *ds, int port, u32 stringset,
                     uint8_t *data)
{
        struct b53_device *dev = ds->priv;
        const struct b53_mib_desc *mibs = b53_get_mib(dev);
        unsigned int mib_size = b53_get_mib_size(dev);
        struct phy_device *phydev;
        unsigned int i;

        if (stringset == ETH_SS_STATS) {
                for (i = 0; i < mib_size; i++)
                        strlcpy(data + i * ETH_GSTRING_LEN,
                                mibs[i].name, ETH_GSTRING_LEN);
        } else if (stringset == ETH_SS_PHY_STATS) {
                phydev = b53_get_phy_device(ds, port);
                if (!phydev)
                        return;

                phy_ethtool_get_strings(phydev, data);
        }
}
EXPORT_SYMBOL(b53_get_strings);

void b53_get_ethtool_stats(struct dsa_switch *ds, int port, uint64_t *data)
{
        struct b53_device *dev = ds->priv;
        const struct b53_mib_desc *mibs = b53_get_mib(dev);
        unsigned int mib_size = b53_get_mib_size(dev);
        const struct b53_mib_desc *s;
        unsigned int i;
        u64 val = 0;

        if (is5365(dev) && port == 5)
                port = 8;

        mutex_lock(&dev->stats_mutex);

        for (i = 0; i < mib_size; i++) {
                s = &mibs[i];

                if (s->size == 8) {
                        b53_read64(dev, B53_MIB_PAGE(port), s->offset, &val);
                } else {
                        u32 val32;

                        b53_read32(dev, B53_MIB_PAGE(port), s->offset,
                                   &val32);
                        val = val32;
                }
                data[i] = (u64)val;
        }

        mutex_unlock(&dev->stats_mutex);
}
EXPORT_SYMBOL(b53_get_ethtool_stats);

void b53_get_ethtool_phy_stats(struct dsa_switch *ds, int port, uint64_t *data)
{
        struct phy_device *phydev;

        phydev = b53_get_phy_device(ds, port);
        if (!phydev)
                return;

        phy_ethtool_get_stats(phydev, NULL, data);
}
EXPORT_SYMBOL(b53_get_ethtool_phy_stats);

int b53_get_sset_count(struct dsa_switch *ds, int port, int sset)
{
        struct b53_device *dev = ds->priv;
        struct phy_device *phydev;

        if (sset == ETH_SS_STATS) {
                return b53_get_mib_size(dev);
        } else if (sset == ETH_SS_PHY_STATS) {
                phydev = b53_get_phy_device(ds, port);
                if (!phydev)
                        return 0;

                return phy_ethtool_get_sset_count(phydev);
        }

        return 0;
}
EXPORT_SYMBOL(b53_get_sset_count);

static int b53_setup(struct dsa_switch *ds)
{
        struct b53_device *dev = ds->priv;
        unsigned int port;
        int ret;

        ret = b53_reset_switch(dev);
        if (ret) {
                dev_err(ds->dev, "failed to reset switch\n");
                return ret;
        }

        b53_reset_mib(dev);

        ret = b53_apply_config(dev);
        if (ret)
                dev_err(ds->dev, "failed to apply configuration\n");

        /* Configure IMP/CPU port, disable unused ports. Enabled
         * ports will be configured with .port_enable
         */
        for (port = 0; port < dev->num_ports; port++) {
                if (dsa_is_cpu_port(ds, port))
                        b53_enable_cpu_port(dev, port);
                else if (dsa_is_unused_port(ds, port))
                        b53_disable_port(ds, port, NULL);
        }

        return ret;
}

static void b53_adjust_link(struct dsa_switch *ds, int port,
                            struct phy_device *phydev)
{
        struct b53_device *dev = ds->priv;
        struct ethtool_eee *p = &dev->ports[port].eee;
        u8 rgmii_ctrl = 0, reg = 0, off;

        if (!phy_is_pseudo_fixed_link(phydev))
                return;

        /* Override the port settings */
        if (port == dev->cpu_port) {
                off = B53_PORT_OVERRIDE_CTRL;
                reg = PORT_OVERRIDE_EN;
        } else {
                off = B53_GMII_PORT_OVERRIDE_CTRL(port);
                reg = GMII_PO_EN;
        }

        /* Set the link UP */
        if (phydev->link)
                reg |= PORT_OVERRIDE_LINK;

        if (phydev->duplex == DUPLEX_FULL)
                reg |= PORT_OVERRIDE_FULL_DUPLEX;

        switch (phydev->speed) {
        case 2000:
                reg |= PORT_OVERRIDE_SPEED_2000M;
                /* fallthrough */
        case SPEED_1000:
                reg |= PORT_OVERRIDE_SPEED_1000M;
                break;
        case SPEED_100:
                reg |= PORT_OVERRIDE_SPEED_100M;
                break;
        case SPEED_10:
                reg |= PORT_OVERRIDE_SPEED_10M;
                break;
        default:
                dev_err(ds->dev, "unknown speed: %d\n", phydev->speed);
                return;
        }

        /* Enable flow control on BCM5301x's CPU port */
        if (is5301x(dev) && port == dev->cpu_port)
                reg |= PORT_OVERRIDE_RX_FLOW | PORT_OVERRIDE_TX_FLOW;

        if (phydev->pause) {
                if (phydev->asym_pause)
                        reg |= PORT_OVERRIDE_TX_FLOW;
                reg |= PORT_OVERRIDE_RX_FLOW;
        }

        b53_write8(dev, B53_CTRL_PAGE, off, reg);

        if (is531x5(dev) && phy_interface_is_rgmii(phydev)) {
                if (port == 8)
                        off = B53_RGMII_CTRL_IMP;
                else

                        off = B53_RGMII_CTRL_P(port);

                /* Configure the port RGMII clock delay by DLL disabled and
                 * tx_clk aligned timing (restoring to reset defaults)
                 */
                b53_read8(dev, B53_CTRL_PAGE, off, &rgmii_ctrl);
                rgmii_ctrl &= ~(RGMII_CTRL_DLL_RXC | RGMII_CTRL_DLL_TXC |
                                RGMII_CTRL_TIMING_SEL);

                /* PHY_INTERFACE_MODE_RGMII_TXID means TX internal delay, make
                 * sure that we enable the port TX clock internal delay to
                 * account for this internal delay that is inserted, otherwise
                 * the switch won't be able to receive correctly.
                 *
                 * PHY_INTERFACE_MODE_RGMII means that we are not introducing
                 * any delay neither on transmission nor reception, so the
                 * BCM53125 must also be configured accordingly to account for
                 * the lack of delay and introduce
                 *
                 * The BCM53125 switch has its RX clock and TX clock control
                 * swapped, hence the reason why we modify the TX clock path in
                 * the "RGMII" case
                 */
                if (phydev->interface == PHY_INTERFACE_MODE_RGMII_TXID)
                        rgmii_ctrl |= RGMII_CTRL_DLL_TXC;
                if (phydev->interface == PHY_INTERFACE_MODE_RGMII)
                        rgmii_ctrl |= RGMII_CTRL_DLL_TXC | RGMII_CTRL_DLL_RXC;
                rgmii_ctrl |= RGMII_CTRL_TIMING_SEL;
                b53_write8(dev, B53_CTRL_PAGE, off, rgmii_ctrl);

                dev_info(ds->dev, "Configured port %d for %s\n", port,
                         phy_modes(phydev->interface));
        }

        /* configure MII port if necessary */
        if (is5325(dev)) {
                b53_read8(dev, B53_CTRL_PAGE, B53_PORT_OVERRIDE_CTRL,
                          &reg);

                /* reverse mii needs to be enabled */
                if (!(reg & PORT_OVERRIDE_RV_MII_25)) {
                        b53_write8(dev, B53_CTRL_PAGE, B53_PORT_OVERRIDE_CTRL,
                                   reg | PORT_OVERRIDE_RV_MII_25);
                        b53_read8(dev, B53_CTRL_PAGE, B53_PORT_OVERRIDE_CTRL,
                                  &reg);

                        if (!(reg & PORT_OVERRIDE_RV_MII_25)) {
                                dev_err(ds->dev,
                                        "Failed to enable reverse MII mode\n");
                                return;
                        }
                }
        } else if (is5301x(dev)) {
                if (port != dev->cpu_port) {
                        u8 po_reg = B53_GMII_PORT_OVERRIDE_CTRL(dev->cpu_port);
                        u8 gmii_po;

                        b53_read8(dev, B53_CTRL_PAGE, po_reg, &gmii_po);
                        gmii_po |= GMII_PO_LINK |
                                   GMII_PO_RX_FLOW |
                                   GMII_PO_TX_FLOW |
                                   GMII_PO_EN |
                                   GMII_PO_SPEED_2000M;
                        b53_write8(dev, B53_CTRL_PAGE, po_reg, gmii_po);
                }
        }

        /* Re-negotiate EEE if it was enabled already */
        p->eee_enabled = b53_eee_init(ds, port, phydev);
}

int b53_vlan_filtering(struct dsa_switch *ds, int port, bool vlan_filtering)
{
        return 0;
}
EXPORT_SYMBOL(b53_vlan_filtering);

int b53_vlan_prepare(struct dsa_switch *ds, int port,
                     const struct switchdev_obj_port_vlan *vlan)
{
        struct b53_device *dev = ds->priv;

        if ((is5325(dev) || is5365(dev)) && vlan->vid_begin == 0)
                return -EOPNOTSUPP;

        if (vlan->vid_end > dev->num_vlans)
                return -ERANGE;

        b53_enable_vlan(dev, true);

        return 0;
}
EXPORT_SYMBOL(b53_vlan_prepare);

void b53_vlan_add(struct dsa_switch *ds, int port,
                  const struct switchdev_obj_port_vlan *vlan)
{
        struct b53_device *dev = ds->priv;
        bool untagged = vlan->flags & BRIDGE_VLAN_INFO_UNTAGGED;
        bool pvid = vlan->flags & BRIDGE_VLAN_INFO_PVID;
        struct b53_vlan *vl;
        u16 vid;

        for (vid = vlan->vid_begin; vid <= vlan->vid_end; ++vid) {
                vl = &dev->vlans[vid];

                b53_get_vlan_entry(dev, vid, vl);

                vl->members |= BIT(port);
                if (untagged && !dsa_is_cpu_port(ds, port))
                        vl->untag |= BIT(port);
                else
                        vl->untag &= ~BIT(port);

                b53_set_vlan_entry(dev, vid, vl);
                b53_fast_age_vlan(dev, vid);
        }

        if (pvid) {
                b53_write16(dev, B53_VLAN_PAGE, B53_VLAN_PORT_DEF_TAG(port),
                            vlan->vid_end);
                b53_fast_age_vlan(dev, vid);
        }
}
EXPORT_SYMBOL(b53_vlan_add);

int b53_vlan_del(struct dsa_switch *ds, int port,
                 const struct switchdev_obj_port_vlan *vlan)
{
        struct b53_device *dev = ds->priv;
        bool untagged = vlan->flags & BRIDGE_VLAN_INFO_UNTAGGED;
        struct b53_vlan *vl;
        u16 vid;
        u16 pvid;

        b53_read16(dev, B53_VLAN_PAGE, B53_VLAN_PORT_DEF_TAG(port), &pvid);

        for (vid = vlan->vid_begin; vid <= vlan->vid_end; ++vid) {
                vl = &dev->vlans[vid];

                b53_get_vlan_entry(dev, vid, vl);

                vl->members &= ~BIT(port);

                if (pvid == vid) {
                        if (is5325(dev) || is5365(dev))
                                pvid = 1;
                        else
                                pvid = 0;
                }

                if (untagged && !dsa_is_cpu_port(ds, port))
                        vl->untag &= ~(BIT(port));

                b53_set_vlan_entry(dev, vid, vl);
                b53_fast_age_vlan(dev, vid);
        }

        b53_write16(dev, B53_VLAN_PAGE, B53_VLAN_PORT_DEF_TAG(port), pvid);
        b53_fast_age_vlan(dev, pvid);

        return 0;
}
EXPORT_SYMBOL(b53_vlan_del);

/* Address Resolution Logic routines */
static int b53_arl_op_wait(struct b53_device *dev)
{
        unsigned int timeout = 10;
        u8 reg;

        do {
                b53_read8(dev, B53_ARLIO_PAGE, B53_ARLTBL_RW_CTRL, &reg);
                if (!(reg & ARLTBL_START_DONE))
                        return 0;

                usleep_range(1000, 2000);
        } while (timeout--);

        dev_warn(dev->dev, "timeout waiting for ARL to finish: 0x%02x\n", reg);

        return -ETIMEDOUT;
}

static int b53_arl_rw_op(struct b53_device *dev, unsigned int op)
{
        u8 reg;

        if (op > ARLTBL_RW)
                return -EINVAL;

        b53_read8(dev, B53_ARLIO_PAGE, B53_ARLTBL_RW_CTRL, &reg);
        reg |= ARLTBL_START_DONE;
        if (op)
                reg |= ARLTBL_RW;
        else
                reg &= ~ARLTBL_RW;
        b53_write8(dev, B53_ARLIO_PAGE, B53_ARLTBL_RW_CTRL, reg);

        return b53_arl_op_wait(dev);
}

static int b53_arl_read(struct b53_device *dev, u64 mac,
                        u16 vid, struct b53_arl_entry *ent, u8 *idx,
                        bool is_valid)
{
        unsigned int i;
        int ret;

        ret = b53_arl_op_wait(dev);
        if (ret)
                return ret;

        /* Read the bins */
        for (i = 0; i < dev->num_arl_entries; i++) {
                u64 mac_vid;
                u32 fwd_entry;

                b53_read64(dev, B53_ARLIO_PAGE,
                           B53_ARLTBL_MAC_VID_ENTRY(i), &mac_vid);
                b53_read32(dev, B53_ARLIO_PAGE,
                           B53_ARLTBL_DATA_ENTRY(i), &fwd_entry);
                b53_arl_to_entry(ent, mac_vid, fwd_entry);

                if (!(fwd_entry & ARLTBL_VALID))
                        continue;
                if ((mac_vid & ARLTBL_MAC_MASK) != mac)
                        continue;
                *idx = i;
        }

        return -ENOENT;
}

static int b53_arl_op(struct b53_device *dev, int op, int port,
                      const unsigned char *addr, u16 vid, bool is_valid)
{
        struct b53_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 = ether_addr_to_u64(addr);

        /* Perform a read for the given MAC and VID */
        b53_write48(dev, B53_ARLIO_PAGE, B53_MAC_ADDR_IDX, mac);
        b53_write16(dev, B53_ARLIO_PAGE, B53_VLAN_ID_IDX, vid);

        /* Issue a read operation for this MAC */
        ret = b53_arl_rw_op(dev, 1);
        if (ret)
                return ret;

        ret = b53_arl_read(dev, 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 = 1;
        }

        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);
        b53_arl_from_entry(&mac_vid, &fwd_entry, &ent);

        b53_write64(dev, B53_ARLIO_PAGE,
                    B53_ARLTBL_MAC_VID_ENTRY(idx), mac_vid);
        b53_write32(dev, B53_ARLIO_PAGE,
                    B53_ARLTBL_DATA_ENTRY(idx), fwd_entry);

        return b53_arl_rw_op(dev, 0);
}

int b53_fdb_add(struct dsa_switch *ds, int port,
                const unsigned char *addr, u16 vid)
{
        struct b53_device *priv = ds->priv;

        /* 5325 and 5365 require some more massaging, but could
         * be supported eventually
         */
        if (is5325(priv) || is5365(priv))
                return -EOPNOTSUPP;

        return b53_arl_op(priv, 0, port, addr, vid, true);
}
EXPORT_SYMBOL(b53_fdb_add);

int b53_fdb_del(struct dsa_switch *ds, int port,
                const unsigned char *addr, u16 vid)
{
        struct b53_device *priv = ds->priv;

        return b53_arl_op(priv, 0, port, addr, vid, false);
}
EXPORT_SYMBOL(b53_fdb_del);

static int b53_arl_search_wait(struct b53_device *dev)
{
        unsigned int timeout = 1000;
        u8 reg;

        do {
                b53_read8(dev, B53_ARLIO_PAGE, B53_ARL_SRCH_CTL, &reg);
                if (!(reg & ARL_SRCH_STDN))
                        return 0;

                if (reg & ARL_SRCH_VLID)
                        return 0;

                usleep_range(1000, 2000);
        } while (timeout--);

        return -ETIMEDOUT;
}

static void b53_arl_search_rd(struct b53_device *dev, u8 idx,
                              struct b53_arl_entry *ent)
{
        u64 mac_vid;
        u32 fwd_entry;

        b53_read64(dev, B53_ARLIO_PAGE,
                   B53_ARL_SRCH_RSTL_MACVID(idx), &mac_vid);
        b53_read32(dev, B53_ARLIO_PAGE,
                   B53_ARL_SRCH_RSTL(idx), &fwd_entry);
        b53_arl_to_entry(ent, mac_vid, fwd_entry);
}

static int b53_fdb_copy(int port, const struct b53_arl_entry *ent,
                        dsa_fdb_dump_cb_t *cb, void *data)
{
        if (!ent->is_valid)
                return 0;

        if (port != ent->port)
                return 0;

        return cb(ent->mac, ent->vid, ent->is_static, data);
}

int b53_fdb_dump(struct dsa_switch *ds, int port,
                 dsa_fdb_dump_cb_t *cb, void *data)
{
        struct b53_device *priv = ds->priv;
        struct b53_arl_entry results[2];
        unsigned int count = 0;
        int ret;
        u8 reg;

        /* Start search operation */
        reg = ARL_SRCH_STDN;
        b53_write8(priv, B53_ARLIO_PAGE, B53_ARL_SRCH_CTL, reg);

        do {
                ret = b53_arl_search_wait(priv);
                if (ret)
                        return ret;

                b53_arl_search_rd(priv, 0, &results[0]);
                ret = b53_fdb_copy(port, &results[0], cb, data);
                if (ret)
                        return ret;

                if (priv->num_arl_entries > 2) {
                        b53_arl_search_rd(priv, 1, &results[1]);
                        ret = b53_fdb_copy(port, &results[1], cb, data);
                        if (ret)
                                return ret;

                        if (!results[0].is_valid && !results[1].is_valid)
                                break;
                }

        } while (count++ < 1024);

        return 0;
}
EXPORT_SYMBOL(b53_fdb_dump);

int b53_br_join(struct dsa_switch *ds, int port, struct net_device *br)
{
        struct b53_device *dev = ds->priv;
        s8 cpu_port = ds->ports[port].cpu_dp->index;
        u16 pvlan, reg;
        unsigned int i;

        /* Make this port leave the all VLANs join since we will have proper
         * VLAN entries from now on
         */
        if (is58xx(dev)) {
                b53_read16(dev, B53_VLAN_PAGE, B53_JOIN_ALL_VLAN_EN, &reg);
                reg &= ~BIT(port);
                if ((reg & BIT(cpu_port)) == BIT(cpu_port))
                        reg &= ~BIT(cpu_port);
                b53_write16(dev, B53_VLAN_PAGE, B53_JOIN_ALL_VLAN_EN, reg);
        }

        b53_read16(dev, B53_PVLAN_PAGE, B53_PVLAN_PORT_MASK(port), &pvlan);

        b53_for_each_port(dev, i) {
                if (dsa_to_port(ds, i)->bridge_dev != br)
                        continue;

                /* Add this local port to the remote port VLAN control
                 * membership and update the remote port bitmask
                 */
                b53_read16(dev, B53_PVLAN_PAGE, B53_PVLAN_PORT_MASK(i), &reg);
                reg |= BIT(port);
                b53_write16(dev, B53_PVLAN_PAGE, B53_PVLAN_PORT_MASK(i), reg);
                dev->ports[i].vlan_ctl_mask = reg;

                pvlan |= BIT(i);
        }

        /* Configure the local port VLAN control membership to include
         * remote ports and update the local port bitmask
         */
        b53_write16(dev, B53_PVLAN_PAGE, B53_PVLAN_PORT_MASK(port), pvlan);
        dev->ports[port].vlan_ctl_mask = pvlan;

        return 0;
}
EXPORT_SYMBOL(b53_br_join);

void b53_br_leave(struct dsa_switch *ds, int port, struct net_device *br)
{
        struct b53_device *dev = ds->priv;
        struct b53_vlan *vl = &dev->vlans[0];
        s8 cpu_port = ds->ports[port].cpu_dp->index;
        unsigned int i;
        u16 pvlan, reg, pvid;

        b53_read16(dev, B53_PVLAN_PAGE, B53_PVLAN_PORT_MASK(port), &pvlan);

        b53_for_each_port(dev, i) {
                /* Don't touch the remaining ports */
                if (dsa_to_port(ds, i)->bridge_dev != br)
                        continue;

                b53_read16(dev, B53_PVLAN_PAGE, B53_PVLAN_PORT_MASK(i), &reg);
                reg &= ~BIT(port);
                b53_write16(dev, B53_PVLAN_PAGE, B53_PVLAN_PORT_MASK(i), reg);
                dev->ports[port].vlan_ctl_mask = reg;

                /* Prevent self removal to preserve isolation */
                if (port != i)
                        pvlan &= ~BIT(i);
        }

        b53_write16(dev, B53_PVLAN_PAGE, B53_PVLAN_PORT_MASK(port), pvlan);
        dev->ports[port].vlan_ctl_mask = pvlan;

        if (is5325(dev) || is5365(dev))
                pvid = 1;
        else
                pvid = 0;

        /* Make this port join all VLANs without VLAN entries */
        if (is58xx(dev)) {
                b53_read16(dev, B53_VLAN_PAGE, B53_JOIN_ALL_VLAN_EN, &reg);
                reg |= BIT(port);
                if (!(reg & BIT(cpu_port)))
                        reg |= BIT(cpu_port);
                b53_write16(dev, B53_VLAN_PAGE, B53_JOIN_ALL_VLAN_EN, reg);
        } else {
                b53_get_vlan_entry(dev, pvid, vl);
                vl->members |= BIT(port) | BIT(cpu_port);
                vl->untag |= BIT(port) | BIT(cpu_port);
                b53_set_vlan_entry(dev, pvid, vl);
        }
}
EXPORT_SYMBOL(b53_br_leave);

void b53_br_set_stp_state(struct dsa_switch *ds, int port, u8 state)
{
        struct b53_device *dev = ds->priv;
        u8 hw_state;
        u8 reg;

        switch (state) {
        case BR_STATE_DISABLED:
                hw_state = PORT_CTRL_DIS_STATE;
                break;
        case BR_STATE_LISTENING:
                hw_state = PORT_CTRL_LISTEN_STATE;
                break;
        case BR_STATE_LEARNING:
                hw_state = PORT_CTRL_LEARN_STATE;
                break;
        case BR_STATE_FORWARDING:
                hw_state = PORT_CTRL_FWD_STATE;
                break;
        case BR_STATE_BLOCKING:
                hw_state = PORT_CTRL_BLOCK_STATE;
                break;
        default:
                dev_err(ds->dev, "invalid STP state: %d\n", state);
                return;
        }

        b53_read8(dev, B53_CTRL_PAGE, B53_PORT_CTRL(port), &reg);
        reg &= ~PORT_CTRL_STP_STATE_MASK;
        reg |= hw_state;
        b53_write8(dev, B53_CTRL_PAGE, B53_PORT_CTRL(port), reg);
}
EXPORT_SYMBOL(b53_br_set_stp_state);

void b53_br_fast_age(struct dsa_switch *ds, int port)
{
        struct b53_device *dev = ds->priv;

        if (b53_fast_age_port(dev, port))
                dev_err(ds->dev, "fast ageing failed\n");
}
EXPORT_SYMBOL(b53_br_fast_age);

static bool b53_possible_cpu_port(struct dsa_switch *ds, int port)
{
        /* Broadcom switches will accept enabling Broadcom tags on the
         * following ports: 5, 7 and 8, any other port is not supported
         */
        switch (port) {
        case B53_CPU_PORT_25:
        case 7:
        case B53_CPU_PORT:
                return true;
        }

        return false;
}

static bool b53_can_enable_brcm_tags(struct dsa_switch *ds, int port)
{
        bool ret = b53_possible_cpu_port(ds, port);

        if (!ret)
                dev_warn(ds->dev, "Port %d is not Broadcom tag capable\n",
                         port);
        return ret;
}

enum dsa_tag_protocol b53_get_tag_protocol(struct dsa_switch *ds, int port)
{
        struct b53_device *dev = ds->priv;

        /* Older models (5325, 5365) support a different tag format that we do
         * not support in net/dsa/tag_brcm.c yet. 539x and 531x5 require managed
         * mode to be turned on which means we need to specifically manage ARL
         * misses on multicast addresses (TBD).
         */
        if (is5325(dev) || is5365(dev) || is539x(dev) || is531x5(dev) ||
            !b53_can_enable_brcm_tags(ds, port))
                return DSA_TAG_PROTO_NONE;

        /* Broadcom BCM58xx chips have a flow accelerator on Port 8
         * which requires us to use the prepended Broadcom tag type
         */
        if (dev->chip_id == BCM58XX_DEVICE_ID && port == B53_CPU_PORT)
                return DSA_TAG_PROTO_BRCM_PREPEND;

        return DSA_TAG_PROTO_BRCM;
}
EXPORT_SYMBOL(b53_get_tag_protocol);

int b53_mirror_add(struct dsa_switch *ds, int port,
                   struct dsa_mall_mirror_tc_entry *mirror, bool ingress)
{
        struct b53_device *dev = ds->priv;
        u16 reg, loc;

        if (ingress)
                loc = B53_IG_MIR_CTL;
        else
                loc = B53_EG_MIR_CTL;

        b53_read16(dev, B53_MGMT_PAGE, loc, &reg);
        reg &= ~MIRROR_MASK;
        reg |= BIT(port);
        b53_write16(dev, B53_MGMT_PAGE, loc, reg);

        b53_read16(dev, B53_MGMT_PAGE, B53_MIR_CAP_CTL, &reg);
        reg &= ~CAP_PORT_MASK;
        reg |= mirror->to_local_port;
        reg |= MIRROR_EN;
        b53_write16(dev, B53_MGMT_PAGE, B53_MIR_CAP_CTL, reg);

        return 0;
}
EXPORT_SYMBOL(b53_mirror_add);

void b53_mirror_del(struct dsa_switch *ds, int port,
                    struct dsa_mall_mirror_tc_entry *mirror)
{
        struct b53_device *dev = ds->priv;
        bool loc_disable = false, other_loc_disable = false;
        u16 reg, loc;

        if (mirror->ingress)
                loc = B53_IG_MIR_CTL;
        else
                loc = B53_EG_MIR_CTL;

        /* Update the desired ingress/egress register */
        b53_read16(dev, B53_MGMT_PAGE, loc, &reg);
        reg &= ~BIT(port);
        if (!(reg & MIRROR_MASK))
                loc_disable = true;
        b53_write16(dev, B53_MGMT_PAGE, loc, reg);

        /* Now look at the other one to know if we can disable mirroring
         * entirely
         */
        if (mirror->ingress)
                b53_read16(dev, B53_MGMT_PAGE, B53_EG_MIR_CTL, &reg);
        else
                b53_read16(dev, B53_MGMT_PAGE, B53_IG_MIR_CTL, &reg);
        if (!(reg & MIRROR_MASK))
                other_loc_disable = true;

        b53_read16(dev, B53_MGMT_PAGE, B53_MIR_CAP_CTL, &reg);
        /* Both no longer have ports, let's disable mirroring */
        if (loc_disable && other_loc_disable) {
                reg &= ~MIRROR_EN;
                reg &= ~mirror->to_local_port;
        }
        b53_write16(dev, B53_MGMT_PAGE, B53_MIR_CAP_CTL, reg);
}
EXPORT_SYMBOL(b53_mirror_del);

void b53_eee_enable_set(struct dsa_switch *ds, int port, bool enable)
{
        struct b53_device *dev = ds->priv;
        u16 reg;

        b53_read16(dev, B53_EEE_PAGE, B53_EEE_EN_CTRL, &reg);
        if (enable)
                reg |= BIT(port);
        else
                reg &= ~BIT(port);
        b53_write16(dev, B53_EEE_PAGE, B53_EEE_EN_CTRL, reg);
}
EXPORT_SYMBOL(b53_eee_enable_set);


/* Returns 0 if EEE was not enabled, or 1 otherwise
 */
int b53_eee_init(struct dsa_switch *ds, int port, struct phy_device *phy)
{
        int ret;

        ret = phy_init_eee(phy, 0);
        if (ret)
                return 0;

        b53_eee_enable_set(ds, port, true);

        return 1;
}
EXPORT_SYMBOL(b53_eee_init);

int b53_get_mac_eee(struct dsa_switch *ds, int port, struct ethtool_eee *e)
{
        struct b53_device *dev = ds->priv;
        struct ethtool_eee *p = &dev->ports[port].eee;
        u16 reg;

        if (is5325(dev) || is5365(dev))
                return -EOPNOTSUPP;

        b53_read16(dev, B53_EEE_PAGE, B53_EEE_LPI_INDICATE, &reg);
        e->eee_enabled = p->eee_enabled;
        e->eee_active = !!(reg & BIT(port));

        return 0;
}
EXPORT_SYMBOL(b53_get_mac_eee);

int b53_set_mac_eee(struct dsa_switch *ds, int port, struct ethtool_eee *e)
{
        struct b53_device *dev = ds->priv;
        struct ethtool_eee *p = &dev->ports[port].eee;

        if (is5325(dev) || is5365(dev))
                return -EOPNOTSUPP;

        p->eee_enabled = e->eee_enabled;
        b53_eee_enable_set(ds, port, e->eee_enabled);

        return 0;
}
EXPORT_SYMBOL(b53_set_mac_eee);

static const struct dsa_switch_ops b53_switch_ops = {
        .get_tag_protocol       = b53_get_tag_protocol,
        .setup                  = b53_setup,
        .get_strings            = b53_get_strings,
        .get_ethtool_stats      = b53_get_ethtool_stats,
        .get_sset_count         = b53_get_sset_count,
        .get_ethtool_phy_stats  = b53_get_ethtool_phy_stats,
        .phy_read               = b53_phy_read16,
        .phy_write              = b53_phy_write16,
        .adjust_link            = b53_adjust_link,
        .port_enable            = b53_enable_port,
        .port_disable           = b53_disable_port,
        .get_mac_eee            = b53_get_mac_eee,
        .set_mac_eee            = b53_set_mac_eee,
        .port_bridge_join       = b53_br_join,
        .port_bridge_leave      = b53_br_leave,
        .port_stp_state_set     = b53_br_set_stp_state,
        .port_fast_age          = b53_br_fast_age,
        .port_vlan_filtering    = b53_vlan_filtering,
        .port_vlan_prepare      = b53_vlan_prepare,
        .port_vlan_add          = b53_vlan_add,
        .port_vlan_del          = b53_vlan_del,
        .port_fdb_dump          = b53_fdb_dump,
        .port_fdb_add           = b53_fdb_add,
        .port_fdb_del           = b53_fdb_del,
        .port_mirror_add        = b53_mirror_add,
        .port_mirror_del        = b53_mirror_del,
};

struct b53_chip_data {
        u32 chip_id;
        const char *dev_name;
        u16 vlans;
        u16 enabled_ports;
        u8 cpu_port;
        u8 vta_regs[3];
        u8 arl_entries;
        u8 duplex_reg;
        u8 jumbo_pm_reg;
        u8 jumbo_size_reg;
};

#define B53_VTA_REGS    \
        { B53_VT_ACCESS, B53_VT_INDEX, B53_VT_ENTRY }
#define B53_VTA_REGS_9798 \
        { B53_VT_ACCESS_9798, B53_VT_INDEX_9798, B53_VT_ENTRY_9798 }
#define B53_VTA_REGS_63XX \
        { B53_VT_ACCESS_63XX, B53_VT_INDEX_63XX, B53_VT_ENTRY_63XX }

static const struct b53_chip_data b53_switch_chips[] = {
        {
                .chip_id = BCM5325_DEVICE_ID,
                .dev_name = "BCM5325",
                .vlans = 16,
                .enabled_ports = 0x1f,
                .arl_entries = 2,
                .cpu_port = B53_CPU_PORT_25,
                .duplex_reg = B53_DUPLEX_STAT_FE,
        },
        {
                .chip_id = BCM5365_DEVICE_ID,
                .dev_name = "BCM5365",
                .vlans = 256,
                .enabled_ports = 0x1f,
                .arl_entries = 2,
                .cpu_port = B53_CPU_PORT_25,
                .duplex_reg = B53_DUPLEX_STAT_FE,
        },
        {
                .chip_id = BCM5389_DEVICE_ID,
                .dev_name = "BCM5389",
                .vlans = 4096,
                .enabled_ports = 0x1f,
                .arl_entries = 4,
                .cpu_port = B53_CPU_PORT,
                .vta_regs = B53_VTA_REGS,
                .duplex_reg = B53_DUPLEX_STAT_GE,
                .jumbo_pm_reg = B53_JUMBO_PORT_MASK,
                .jumbo_size_reg = B53_JUMBO_MAX_SIZE,
        },
        {
                .chip_id = BCM5395_DEVICE_ID,
                .dev_name = "BCM5395",
                .vlans = 4096,
                .enabled_ports = 0x1f,
                .arl_entries = 4,
                .cpu_port = B53_CPU_PORT,
                .vta_regs = B53_VTA_REGS,
                .duplex_reg = B53_DUPLEX_STAT_GE,
                .jumbo_pm_reg = B53_JUMBO_PORT_MASK,
                .jumbo_size_reg = B53_JUMBO_MAX_SIZE,
        },
        {
                .chip_id = BCM5397_DEVICE_ID,
                .dev_name = "BCM5397",
                .vlans = 4096,
                .enabled_ports = 0x1f,
                .arl_entries = 4,
                .cpu_port = B53_CPU_PORT,
                .vta_regs = B53_VTA_REGS_9798,
                .duplex_reg = B53_DUPLEX_STAT_GE,
                .jumbo_pm_reg = B53_JUMBO_PORT_MASK,
                .jumbo_size_reg = B53_JUMBO_MAX_SIZE,
        },
        {
                .chip_id = BCM5398_DEVICE_ID,
                .dev_name = "BCM5398",
                .vlans = 4096,
                .enabled_ports = 0x7f,
                .arl_entries = 4,
                .cpu_port = B53_CPU_PORT,
                .vta_regs = B53_VTA_REGS_9798,
                .duplex_reg = B53_DUPLEX_STAT_GE,
                .jumbo_pm_reg = B53_JUMBO_PORT_MASK,
                .jumbo_size_reg = B53_JUMBO_MAX_SIZE,
        },
        {
                .chip_id = BCM53115_DEVICE_ID,
                .dev_name = "BCM53115",
                .vlans = 4096,
                .enabled_ports = 0x1f,
                .arl_entries = 4,
                .vta_regs = B53_VTA_REGS,
                .cpu_port = B53_CPU_PORT,
                .duplex_reg = B53_DUPLEX_STAT_GE,
                .jumbo_pm_reg = B53_JUMBO_PORT_MASK,
                .jumbo_size_reg = B53_JUMBO_MAX_SIZE,
        },
        {
                .chip_id = BCM53125_DEVICE_ID,
                .dev_name = "BCM53125",
                .vlans = 4096,
                .enabled_ports = 0xff,
                .arl_entries = 4,
                .cpu_port = B53_CPU_PORT,
                .vta_regs = B53_VTA_REGS,
                .duplex_reg = B53_DUPLEX_STAT_GE,
                .jumbo_pm_reg = B53_JUMBO_PORT_MASK,
                .jumbo_size_reg = B53_JUMBO_MAX_SIZE,
        },
        {
                .chip_id = BCM53128_DEVICE_ID,
                .dev_name = "BCM53128",
                .vlans = 4096,
                .enabled_ports = 0x1ff,
                .arl_entries = 4,
                .cpu_port = B53_CPU_PORT,
                .vta_regs = B53_VTA_REGS,
                .duplex_reg = B53_DUPLEX_STAT_GE,
                .jumbo_pm_reg = B53_JUMBO_PORT_MASK,
                .jumbo_size_reg = B53_JUMBO_MAX_SIZE,
        },
        {
                .chip_id = BCM63XX_DEVICE_ID,
                .dev_name = "BCM63xx",
                .vlans = 4096,
                .enabled_ports = 0, /* pdata must provide them */
                .arl_entries = 4,
                .cpu_port = B53_CPU_PORT,
                .vta_regs = B53_VTA_REGS_63XX,
                .duplex_reg = B53_DUPLEX_STAT_63XX,
                .jumbo_pm_reg = B53_JUMBO_PORT_MASK_63XX,
                .jumbo_size_reg = B53_JUMBO_MAX_SIZE_63XX,
        },
        {
                .chip_id = BCM53010_DEVICE_ID,
                .dev_name = "BCM53010",
                .vlans = 4096,
                .enabled_ports = 0x1f,
                .arl_entries = 4,
                .cpu_port = B53_CPU_PORT_25, /* TODO: auto detect */
                .vta_regs = B53_VTA_REGS,
                .duplex_reg = B53_DUPLEX_STAT_GE,
                .jumbo_pm_reg = B53_JUMBO_PORT_MASK,
                .jumbo_size_reg = B53_JUMBO_MAX_SIZE,
        },
        {
                .chip_id = BCM53011_DEVICE_ID,
                .dev_name = "BCM53011",
                .vlans = 4096,
                .enabled_ports = 0x1bf,
                .arl_entries = 4,
                .cpu_port = B53_CPU_PORT_25, /* TODO: auto detect */
                .vta_regs = B53_VTA_REGS,
                .duplex_reg = B53_DUPLEX_STAT_GE,
                .jumbo_pm_reg = B53_JUMBO_PORT_MASK,
                .jumbo_size_reg = B53_JUMBO_MAX_SIZE,
        },
        {
                .chip_id = BCM53012_DEVICE_ID,
                .dev_name = "BCM53012",
                .vlans = 4096,
                .enabled_ports = 0x1bf,
                .arl_entries = 4,
                .cpu_port = B53_CPU_PORT_25, /* TODO: auto detect */
                .vta_regs = B53_VTA_REGS,
                .duplex_reg = B53_DUPLEX_STAT_GE,
                .jumbo_pm_reg = B53_JUMBO_PORT_MASK,
                .jumbo_size_reg = B53_JUMBO_MAX_SIZE,
        },
        {
                .chip_id = BCM53018_DEVICE_ID,
                .dev_name = "BCM53018",
                .vlans = 4096,
                .enabled_ports = 0x1f,
                .arl_entries = 4,
                .cpu_port = B53_CPU_PORT_25, /* TODO: auto detect */
                .vta_regs = B53_VTA_REGS,
                .duplex_reg = B53_DUPLEX_STAT_GE,
                .jumbo_pm_reg = B53_JUMBO_PORT_MASK,
                .jumbo_size_reg = B53_JUMBO_MAX_SIZE,
        },
        {
                .chip_id = BCM53019_DEVICE_ID,
                .dev_name = "BCM53019",
                .vlans = 4096,
                .enabled_ports = 0x1f,
                .arl_entries = 4,
                .cpu_port = B53_CPU_PORT_25, /* TODO: auto detect */
                .vta_regs = B53_VTA_REGS,
                .duplex_reg = B53_DUPLEX_STAT_GE,
                .jumbo_pm_reg = B53_JUMBO_PORT_MASK,
                .jumbo_size_reg = B53_JUMBO_MAX_SIZE,
        },
        {
                .chip_id = BCM58XX_DEVICE_ID,
                .dev_name = "BCM585xx/586xx/88312",
                .vlans  = 4096,
                .enabled_ports = 0x1ff,
                .arl_entries = 4,
                .cpu_port = B53_CPU_PORT,
                .vta_regs = B53_VTA_REGS,
                .duplex_reg = B53_DUPLEX_STAT_GE,
                .jumbo_pm_reg = B53_JUMBO_PORT_MASK,
                .jumbo_size_reg = B53_JUMBO_MAX_SIZE,
        },
        {
                .chip_id = BCM583XX_DEVICE_ID,
                .dev_name = "BCM583xx/11360",
                .vlans = 4096,
                .enabled_ports = 0x103,
                .arl_entries = 4,
                .cpu_port = B53_CPU_PORT,
                .vta_regs = B53_VTA_REGS,
                .duplex_reg = B53_DUPLEX_STAT_GE,
                .jumbo_pm_reg = B53_JUMBO_PORT_MASK,
                .jumbo_size_reg = B53_JUMBO_MAX_SIZE,
        },
        {
                .chip_id = BCM7445_DEVICE_ID,
                .dev_name = "BCM7445",
                .vlans  = 4096,
                .enabled_ports = 0x1ff,
                .arl_entries = 4,
                .cpu_port = B53_CPU_PORT,
                .vta_regs = B53_VTA_REGS,
                .duplex_reg = B53_DUPLEX_STAT_GE,
                .jumbo_pm_reg = B53_JUMBO_PORT_MASK,
                .jumbo_size_reg = B53_JUMBO_MAX_SIZE,
        },
        {
                .chip_id = BCM7278_DEVICE_ID,
                .dev_name = "BCM7278",
                .vlans = 4096,
                .enabled_ports = 0x1ff,
                .arl_entries= 4,
                .cpu_port = B53_CPU_PORT,
                .vta_regs = B53_VTA_REGS,
                .duplex_reg = B53_DUPLEX_STAT_GE,
                .jumbo_pm_reg = B53_JUMBO_PORT_MASK,
                .jumbo_size_reg = B53_JUMBO_MAX_SIZE,
        },
};

static int b53_switch_init(struct b53_device *dev)
{
        unsigned int i;
        int ret;

        for (i = 0; i < ARRAY_SIZE(b53_switch_chips); i++) {
                const struct b53_chip_data *chip = &b53_switch_chips[i];

                if (chip->chip_id == dev->chip_id) {
                        if (!dev->enabled_ports)
                                dev->enabled_ports = chip->enabled_ports;
                        dev->name = chip->dev_name;
                        dev->duplex_reg = chip->duplex_reg;
                        dev->vta_regs[0] = chip->vta_regs[0];
                        dev->vta_regs[1] = chip->vta_regs[1];
                        dev->vta_regs[2] = chip->vta_regs[2];
                        dev->jumbo_pm_reg = chip->jumbo_pm_reg;
                        dev->cpu_port = chip->cpu_port;
                        dev->num_vlans = chip->vlans;
                        dev->num_arl_entries = chip->arl_entries;
                        break;
                }
        }

        /* check which BCM5325x version we have */
        if (is5325(dev)) {
                u8 vc4;

                b53_read8(dev, B53_VLAN_PAGE, B53_VLAN_CTRL4_25, &vc4);

                /* check reserved bits */
                switch (vc4 & 3) {
                case 1:
                        /* BCM5325E */
                        break;
                case 3:
                        /* BCM5325F - do not use port 4 */
                        dev->enabled_ports &= ~BIT(4);
                        break;
                default:
/* On the BCM47XX SoCs this is the supported internal switch.*/
#ifndef CONFIG_BCM47XX
                        /* BCM5325M */
                        return -EINVAL;
#else
                        break;
#endif
                }
        } else if (dev->chip_id == BCM53115_DEVICE_ID) {
                u64 strap_value;

                b53_read48(dev, B53_STAT_PAGE, B53_STRAP_VALUE, &strap_value);
                /* use second IMP port if GMII is enabled */
                if (strap_value & SV_GMII_CTRL_115)
                        dev->cpu_port = 5;
        }

        /* cpu port is always last */
        dev->num_ports = dev->cpu_port + 1;
        dev->enabled_ports |= BIT(dev->cpu_port);

        /* Include non standard CPU port built-in PHYs to be probed */
        if (is539x(dev) || is531x5(dev)) {
                for (i = 0; i < dev->num_ports; i++) {
                        if (!(dev->ds->phys_mii_mask & BIT(i)) &&
                            !b53_possible_cpu_port(dev->ds, i))
                                dev->ds->phys_mii_mask |= BIT(i);
                }
        }

        dev->ports = devm_kcalloc(dev->dev,
                                  dev->num_ports, sizeof(struct b53_port),
                                  GFP_KERNEL);
        if (!dev->ports)
                return -ENOMEM;

        dev->vlans = devm_kcalloc(dev->dev,
                                  dev->num_vlans, sizeof(struct b53_vlan),
                                  GFP_KERNEL);
        if (!dev->vlans)
                return -ENOMEM;

        dev->reset_gpio = b53_switch_get_reset_gpio(dev);
        if (dev->reset_gpio >= 0) {
                ret = devm_gpio_request_one(dev->dev, dev->reset_gpio,
                                            GPIOF_OUT_INIT_HIGH, "robo_reset");
                if (ret)
                        return ret;
        }

        return 0;
}

struct b53_device *b53_switch_alloc(struct device *base,
                                    const struct b53_io_ops *ops,
                                    void *priv)
{
        struct dsa_switch *ds;
        struct b53_device *dev;

        ds = dsa_switch_alloc(base, DSA_MAX_PORTS);
        if (!ds)
                return NULL;

        dev = devm_kzalloc(base, sizeof(*dev), GFP_KERNEL);
        if (!dev)
                return NULL;

        ds->priv = dev;
        dev->dev = base;

        dev->ds = ds;
        dev->priv = priv;
        dev->ops = ops;
        ds->ops = &b53_switch_ops;
        mutex_init(&dev->reg_mutex);
        mutex_init(&dev->stats_mutex);

        return dev;
}
EXPORT_SYMBOL(b53_switch_alloc);

int b53_switch_detect(struct b53_device *dev)
{
        u32 id32;
        u16 tmp;
        u8 id8;
        int ret;

        ret = b53_read8(dev, B53_MGMT_PAGE, B53_DEVICE_ID, &id8);
        if (ret)
                return ret;

        switch (id8) {
        case 0:
                /* BCM5325 and BCM5365 do not have this register so reads
                 * return 0. But the read operation did succeed, so assume this
                 * is one of them.
                 *
                 * Next check if we can write to the 5325's VTA register; for
                 * 5365 it is read only.
                 */
                b53_write16(dev, B53_VLAN_PAGE, B53_VLAN_TABLE_ACCESS_25, 0xf);
                b53_read16(dev, B53_VLAN_PAGE, B53_VLAN_TABLE_ACCESS_25, &tmp);

                if (tmp == 0xf)
                        dev->chip_id = BCM5325_DEVICE_ID;
                else
                        dev->chip_id = BCM5365_DEVICE_ID;
                break;
        case BCM5389_DEVICE_ID:
        case BCM5395_DEVICE_ID:
        case BCM5397_DEVICE_ID:
        case BCM5398_DEVICE_ID:
                dev->chip_id = id8;
                break;
        default:
                ret = b53_read32(dev, B53_MGMT_PAGE, B53_DEVICE_ID, &id32);
                if (ret)
                        return ret;

                switch (id32) {
                case BCM53115_DEVICE_ID:
                case BCM53125_DEVICE_ID:
                case BCM53128_DEVICE_ID:
                case BCM53010_DEVICE_ID:
                case BCM53011_DEVICE_ID:
                case BCM53012_DEVICE_ID:
                case BCM53018_DEVICE_ID:
                case BCM53019_DEVICE_ID:
                        dev->chip_id = id32;
                        break;
                default:
                        pr_err("unsupported switch detected (BCM53%02x/BCM%x)\n",
                               id8, id32);
                        return -ENODEV;
                }
        }

        if (dev->chip_id == BCM5325_DEVICE_ID)
                return b53_read8(dev, B53_STAT_PAGE, B53_REV_ID_25,
                                 &dev->core_rev);
        else
                return b53_read8(dev, B53_MGMT_PAGE, B53_REV_ID,
                                 &dev->core_rev);
}
EXPORT_SYMBOL(b53_switch_detect);

int b53_switch_register(struct b53_device *dev)
{
        int ret;

        if (dev->pdata) {
                dev->chip_id = dev->pdata->chip_id;
                dev->enabled_ports = dev->pdata->enabled_ports;
        }

        if (!dev->chip_id && b53_switch_detect(dev))
                return -EINVAL;

        ret = b53_switch_init(dev);
        if (ret)
                return ret;

        pr_info("found switch: %s, rev %i\n", dev->name, dev->core_rev);

        return dsa_register_switch(dev->ds);
}
EXPORT_SYMBOL(b53_switch_register);

MODULE_AUTHOR("Jonas Gorski <jogo@openwrt.org>");
MODULE_DESCRIPTION("B53 switch library");
MODULE_LICENSE("Dual BSD/GPL");