ksz9477.c

// SPDX-License-Identifier: GPL-2.0
/*
 * Microchip KSZ9477 switch driver main logic
 *
 * Copyright (C) 2017-2019 Microchip Technology Inc.
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/iopoll.h>
#include <linux/platform_data/microchip-ksz.h>
#include <linux/phy.h>
#include <linux/if_bridge.h>
#include <net/dsa.h>
#include <net/switchdev.h>

#include "ksz9477_reg.h"
#include "ksz_common.h"

/* Used with variable features to indicate capabilities. */
#define GBIT_SUPPORT			BIT(0)
#define NEW_XMII			BIT(1)
#define IS_9893				BIT(2)

static const struct {
	int index;
	char string[ETH_GSTRING_LEN];
} ksz9477_mib_names[TOTAL_SWITCH_COUNTER_NUM] = {
	{ 0x00, "rx_hi" },
	{ 0x01, "rx_undersize" },
	{ 0x02, "rx_fragments" },
	{ 0x03, "rx_oversize" },
	{ 0x04, "rx_jabbers" },
	{ 0x05, "rx_symbol_err" },
	{ 0x06, "rx_crc_err" },
	{ 0x07, "rx_align_err" },
	{ 0x08, "rx_mac_ctrl" },
	{ 0x09, "rx_pause" },
	{ 0x0A, "rx_bcast" },
	{ 0x0B, "rx_mcast" },
	{ 0x0C, "rx_ucast" },
	{ 0x0D, "rx_64_or_less" },
	{ 0x0E, "rx_65_127" },
	{ 0x0F, "rx_128_255" },
	{ 0x10, "rx_256_511" },
	{ 0x11, "rx_512_1023" },
	{ 0x12, "rx_1024_1522" },
	{ 0x13, "rx_1523_2000" },
	{ 0x14, "rx_2001" },
	{ 0x15, "tx_hi" },
	{ 0x16, "tx_late_col" },
	{ 0x17, "tx_pause" },
	{ 0x18, "tx_bcast" },
	{ 0x19, "tx_mcast" },
	{ 0x1A, "tx_ucast" },
	{ 0x1B, "tx_deferred" },
	{ 0x1C, "tx_total_col" },
	{ 0x1D, "tx_exc_col" },
	{ 0x1E, "tx_single_col" },
	{ 0x1F, "tx_mult_col" },
	{ 0x80, "rx_total" },
	{ 0x81, "tx_total" },
	{ 0x82, "rx_discards" },
	{ 0x83, "tx_discards" },
};

static void ksz_cfg(struct ksz_device *dev, u32 addr, u8 bits, bool set)
{
	regmap_update_bits(dev->regmap[0], addr, bits, set ? bits : 0);
}

static void ksz_port_cfg(struct ksz_device *dev, int port, int offset, u8 bits,
			 bool set)
{
	regmap_update_bits(dev->regmap[0], PORT_CTRL_ADDR(port, offset),
			   bits, set ? bits : 0);
}

static void ksz9477_cfg32(struct ksz_device *dev, u32 addr, u32 bits, bool set)
{
	regmap_update_bits(dev->regmap[2], addr, bits, set ? bits : 0);
}

static void ksz9477_port_cfg32(struct ksz_device *dev, int port, int offset,
			       u32 bits, bool set)
{
	regmap_update_bits(dev->regmap[2], PORT_CTRL_ADDR(port, offset),
			   bits, set ? bits : 0);
}

static int ksz9477_wait_vlan_ctrl_ready(struct ksz_device *dev)
{
	unsigned int val;

	return regmap_read_poll_timeout(dev->regmap[0], REG_SW_VLAN_CTRL,
					val, !(val & VLAN_START), 10, 1000);
}

static int ksz9477_get_vlan_table(struct ksz_device *dev, u16 vid,
				  u32 *vlan_table)
{
	int ret;

	mutex_lock(&dev->vlan_mutex);

	ksz_write16(dev, REG_SW_VLAN_ENTRY_INDEX__2, vid & VLAN_INDEX_M);
	ksz_write8(dev, REG_SW_VLAN_CTRL, VLAN_READ | VLAN_START);

	/* wait to be cleared */
	ret = ksz9477_wait_vlan_ctrl_ready(dev);
	if (ret) {
		dev_dbg(dev->dev, "Failed to read vlan table\n");
		goto exit;
	}

	ksz_read32(dev, REG_SW_VLAN_ENTRY__4, &vlan_table[0]);
	ksz_read32(dev, REG_SW_VLAN_ENTRY_UNTAG__4, &vlan_table[1]);
	ksz_read32(dev, REG_SW_VLAN_ENTRY_PORTS__4, &vlan_table[2]);

	ksz_write8(dev, REG_SW_VLAN_CTRL, 0);

exit:
	mutex_unlock(&dev->vlan_mutex);

	return ret;
}

static int ksz9477_set_vlan_table(struct ksz_device *dev, u16 vid,
				  u32 *vlan_table)
{
	int ret;

	mutex_lock(&dev->vlan_mutex);

	ksz_write32(dev, REG_SW_VLAN_ENTRY__4, vlan_table[0]);
	ksz_write32(dev, REG_SW_VLAN_ENTRY_UNTAG__4, vlan_table[1]);
	ksz_write32(dev, REG_SW_VLAN_ENTRY_PORTS__4, vlan_table[2]);

	ksz_write16(dev, REG_SW_VLAN_ENTRY_INDEX__2, vid & VLAN_INDEX_M);
	ksz_write8(dev, REG_SW_VLAN_CTRL, VLAN_START | VLAN_WRITE);

	/* wait to be cleared */
	ret = ksz9477_wait_vlan_ctrl_ready(dev);
	if (ret) {
		dev_dbg(dev->dev, "Failed to write vlan table\n");
		goto exit;
	}

	ksz_write8(dev, REG_SW_VLAN_CTRL, 0);

	/* update vlan cache table */
	dev->vlan_cache[vid].table[0] = vlan_table[0];
	dev->vlan_cache[vid].table[1] = vlan_table[1];
	dev->vlan_cache[vid].table[2] = vlan_table[2];

exit:
	mutex_unlock(&dev->vlan_mutex);

	return ret;
}

static void ksz9477_read_table(struct ksz_device *dev, u32 *table)
{
	ksz_read32(dev, REG_SW_ALU_VAL_A, &table[0]);
	ksz_read32(dev, REG_SW_ALU_VAL_B, &table[1]);
	ksz_read32(dev, REG_SW_ALU_VAL_C, &table[2]);
	ksz_read32(dev, REG_SW_ALU_VAL_D, &table[3]);
}

static void ksz9477_write_table(struct ksz_device *dev, u32 *table)
{
	ksz_write32(dev, REG_SW_ALU_VAL_A, table[0]);
	ksz_write32(dev, REG_SW_ALU_VAL_B, table[1]);
	ksz_write32(dev, REG_SW_ALU_VAL_C, table[2]);
	ksz_write32(dev, REG_SW_ALU_VAL_D, table[3]);
}

static int ksz9477_wait_alu_ready(struct ksz_device *dev)
{
	unsigned int val;

	return regmap_read_poll_timeout(dev->regmap[2], REG_SW_ALU_CTRL__4,
					val, !(val & ALU_START), 10, 1000);
}

static int ksz9477_wait_alu_sta_ready(struct ksz_device *dev)
{
	unsigned int val;

	return regmap_read_poll_timeout(dev->regmap[2],
					REG_SW_ALU_STAT_CTRL__4,
					val, !(val & ALU_STAT_START),
					10, 1000);
}

static int ksz9477_reset_switch(struct ksz_device *dev)
{
	u8 data8;
	u32 data32;

	/* reset switch */
	ksz_cfg(dev, REG_SW_OPERATION, SW_RESET, true);

	/* turn off SPI DO Edge select */
	regmap_update_bits(dev->regmap[0], REG_SW_GLOBAL_SERIAL_CTRL_0,
			   SPI_AUTO_EDGE_DETECTION, 0);

	/* default configuration */
	ksz_read8(dev, REG_SW_LUE_CTRL_1, &data8);
	data8 = SW_AGING_ENABLE | SW_LINK_AUTO_AGING |
	      SW_SRC_ADDR_FILTER | SW_FLUSH_STP_TABLE | SW_FLUSH_MSTP_TABLE;
	ksz_write8(dev, REG_SW_LUE_CTRL_1, data8);

	/* disable interrupts */
	ksz_write32(dev, REG_SW_INT_MASK__4, SWITCH_INT_MASK);
	ksz_write32(dev, REG_SW_PORT_INT_MASK__4, 0x7F);
	ksz_read32(dev, REG_SW_PORT_INT_STATUS__4, &data32);

	/* set broadcast storm protection 10% rate */
	regmap_update_bits(dev->regmap[1], REG_SW_MAC_CTRL_2,
			   BROADCAST_STORM_RATE,
			   (BROADCAST_STORM_VALUE *
			   BROADCAST_STORM_PROT_RATE) / 100);

	if (dev->synclko_125)
		ksz_write8(dev, REG_SW_GLOBAL_OUTPUT_CTRL__1,
			   SW_ENABLE_REFCLKO | SW_REFCLKO_IS_125MHZ);

	return 0;
}

static void ksz9477_r_mib_cnt(struct ksz_device *dev, int port, u16 addr,
			      u64 *cnt)
{
	struct ksz_port *p = &dev->ports[port];
	unsigned int val;
	u32 data;
	int ret;

	/* retain the flush/freeze bit */
	data = p->freeze ? MIB_COUNTER_FLUSH_FREEZE : 0;
	data |= MIB_COUNTER_READ;
	data |= (addr << MIB_COUNTER_INDEX_S);
	ksz_pwrite32(dev, port, REG_PORT_MIB_CTRL_STAT__4, data);

	ret = regmap_read_poll_timeout(dev->regmap[2],
			PORT_CTRL_ADDR(port, REG_PORT_MIB_CTRL_STAT__4),
			val, !(val & MIB_COUNTER_READ), 10, 1000);
	/* failed to read MIB. get out of loop */
	if (ret) {
		dev_dbg(dev->dev, "Failed to get MIB\n");
		return;
	}

	/* count resets upon read */
	ksz_pread32(dev, port, REG_PORT_MIB_DATA, &data);
	*cnt += data;
}

static void ksz9477_r_mib_pkt(struct ksz_device *dev, int port, u16 addr,
			      u64 *dropped, u64 *cnt)
{
	addr = ksz9477_mib_names[addr].index;
	ksz9477_r_mib_cnt(dev, port, addr, cnt);
}

static void ksz9477_freeze_mib(struct ksz_device *dev, int port, bool freeze)
{
	u32 val = freeze ? MIB_COUNTER_FLUSH_FREEZE : 0;
	struct ksz_port *p = &dev->ports[port];

	/* enable/disable the port for flush/freeze function */
	mutex_lock(&p->mib.cnt_mutex);
	ksz_pwrite32(dev, port, REG_PORT_MIB_CTRL_STAT__4, val);

	/* used by MIB counter reading code to know freeze is enabled */
	p->freeze = freeze;
	mutex_unlock(&p->mib.cnt_mutex);
}

static void ksz9477_port_init_cnt(struct ksz_device *dev, int port)
{
	struct ksz_port_mib *mib = &dev->ports[port].mib;

	/* flush all enabled port MIB counters */
	mutex_lock(&mib->cnt_mutex);
	ksz_pwrite32(dev, port, REG_PORT_MIB_CTRL_STAT__4,
		     MIB_COUNTER_FLUSH_FREEZE);
	ksz_write8(dev, REG_SW_MAC_CTRL_6, SW_MIB_COUNTER_FLUSH);
	ksz_pwrite32(dev, port, REG_PORT_MIB_CTRL_STAT__4, 0);
	mutex_unlock(&mib->cnt_mutex);

	mib->cnt_ptr = 0;
	memset(mib->counters, 0, dev->mib_cnt * sizeof(u64));
}

static enum dsa_tag_protocol ksz9477_get_tag_protocol(struct dsa_switch *ds,
						      int port,
						      enum dsa_tag_protocol mp)
{
	enum dsa_tag_protocol proto = DSA_TAG_PROTO_KSZ9477;
	struct ksz_device *dev = ds->priv;

	if (dev->features & IS_9893)
		proto = DSA_TAG_PROTO_KSZ9893;
	return proto;
}

static int ksz9477_phy_read16(struct dsa_switch *ds, int addr, int reg)
{
	struct ksz_device *dev = ds->priv;
	u16 val = 0xffff;

	/* No real PHY after this. Simulate the PHY.
	 * A fixed PHY can be setup in the device tree, but this function is
	 * still called for that port during initialization.
	 * For RGMII PHY there is no way to access it so the fixed PHY should
	 * be used.  For SGMII PHY the supporting code will be added later.
	 */
	if (addr >= dev->phy_port_cnt) {
		struct ksz_port *p = &dev->ports[addr];

		switch (reg) {
		case MII_BMCR:
			val = 0x1140;
			break;
		case MII_BMSR:
			val = 0x796d;
			break;
		case MII_PHYSID1:
			val = 0x0022;
			break;
		case MII_PHYSID2:
			val = 0x1631;
			break;
		case MII_ADVERTISE:
			val = 0x05e1;
			break;
		case MII_LPA:
			val = 0xc5e1;
			break;
		case MII_CTRL1000:
			val = 0x0700;
			break;
		case MII_STAT1000:
			if (p->phydev.speed == SPEED_1000)
				val = 0x3800;
			else
				val = 0;
			break;
		}
	} else {
		ksz_pread16(dev, addr, 0x100 + (reg << 1), &val);
	}

	return val;
}

static int ksz9477_phy_write16(struct dsa_switch *ds, int addr, int reg,
			       u16 val)
{
	struct ksz_device *dev = ds->priv;

	/* No real PHY after this. */
	if (addr >= dev->phy_port_cnt)
		return 0;

	/* No gigabit support.  Do not write to this register. */
	if (!(dev->features & GBIT_SUPPORT) && reg == MII_CTRL1000)
		return 0;
	ksz_pwrite16(dev, addr, 0x100 + (reg << 1), val);

	return 0;
}

static void ksz9477_get_strings(struct dsa_switch *ds, int port,
				u32 stringset, uint8_t *buf)
{
	int i;

	if (stringset != ETH_SS_STATS)
		return;

	for (i = 0; i < TOTAL_SWITCH_COUNTER_NUM; i++) {
		memcpy(buf + i * ETH_GSTRING_LEN, ksz9477_mib_names[i].string,
		       ETH_GSTRING_LEN);
	}
}

static void ksz9477_cfg_port_member(struct ksz_device *dev, int port,
				    u8 member)
{
	ksz_pwrite32(dev, port, REG_PORT_VLAN_MEMBERSHIP__4, member);
}

static void ksz9477_port_stp_state_set(struct dsa_switch *ds, int port,
				       u8 state)
{
	struct ksz_device *dev = ds->priv;
	struct ksz_port *p = &dev->ports[port];
	u8 data;

	ksz_pread8(dev, port, P_STP_CTRL, &data);
	data &= ~(PORT_TX_ENABLE | PORT_RX_ENABLE | PORT_LEARN_DISABLE);

	switch (state) {
	case BR_STATE_DISABLED:
		data |= PORT_LEARN_DISABLE;
		break;
	case BR_STATE_LISTENING:
		data |= (PORT_RX_ENABLE | PORT_LEARN_DISABLE);
		break;
	case BR_STATE_LEARNING:
		data |= PORT_RX_ENABLE;
		break;
	case BR_STATE_FORWARDING:
		data |= (PORT_TX_ENABLE | PORT_RX_ENABLE);
		break;
	case BR_STATE_BLOCKING:
		data |= PORT_LEARN_DISABLE;
		break;
	default:
		dev_err(ds->dev, "invalid STP state: %d\n", state);
		return;
	}

	ksz_pwrite8(dev, port, P_STP_CTRL, data);
	p->stp_state = state;

	ksz_update_port_member(dev, port);
}

static void ksz9477_flush_dyn_mac_table(struct ksz_device *dev, int port)
{
	u8 data;

	regmap_update_bits(dev->regmap[0], REG_SW_LUE_CTRL_2,
			   SW_FLUSH_OPTION_M << SW_FLUSH_OPTION_S,
			   SW_FLUSH_OPTION_DYN_MAC << SW_FLUSH_OPTION_S);

	if (port < dev->port_cnt) {
		/* flush individual port */
		ksz_pread8(dev, port, P_STP_CTRL, &data);
		if (!(data & PORT_LEARN_DISABLE))
			ksz_pwrite8(dev, port, P_STP_CTRL,
				    data | PORT_LEARN_DISABLE);
		ksz_cfg(dev, S_FLUSH_TABLE_CTRL, SW_FLUSH_DYN_MAC_TABLE, true);
		ksz_pwrite8(dev, port, P_STP_CTRL, data);
	} else {
		/* flush all */
		ksz_cfg(dev, S_FLUSH_TABLE_CTRL, SW_FLUSH_STP_TABLE, true);
	}
}

static int ksz9477_port_vlan_filtering(struct dsa_switch *ds, int port,
				       bool flag,
				       struct netlink_ext_ack *extack)
{
	struct ksz_device *dev = ds->priv;

	if (flag) {
		ksz_port_cfg(dev, port, REG_PORT_LUE_CTRL,
			     PORT_VLAN_LOOKUP_VID_0, true);
		ksz_cfg(dev, REG_SW_LUE_CTRL_0, SW_VLAN_ENABLE, true);
	} else {
		ksz_cfg(dev, REG_SW_LUE_CTRL_0, SW_VLAN_ENABLE, false);
		ksz_port_cfg(dev, port, REG_PORT_LUE_CTRL,
			     PORT_VLAN_LOOKUP_VID_0, false);
	}

	return 0;
}

static int ksz9477_port_vlan_add(struct dsa_switch *ds, int port,
				 const struct switchdev_obj_port_vlan *vlan,
				 struct netlink_ext_ack *extack)
{
	struct ksz_device *dev = ds->priv;
	u32 vlan_table[3];
	bool untagged = vlan->flags & BRIDGE_VLAN_INFO_UNTAGGED;
	int err;

	err = ksz9477_get_vlan_table(dev, vlan->vid, vlan_table);
	if (err) {
		NL_SET_ERR_MSG_MOD(extack, "Failed to get vlan table");
		return err;
	}

	vlan_table[0] = VLAN_VALID | (vlan->vid & VLAN_FID_M);
	if (untagged)
		vlan_table[1] |= BIT(port);
	else
		vlan_table[1] &= ~BIT(port);
	vlan_table[1] &= ~(BIT(dev->cpu_port));

	vlan_table[2] |= BIT(port) | BIT(dev->cpu_port);

	err = ksz9477_set_vlan_table(dev, vlan->vid, vlan_table);
	if (err) {
		NL_SET_ERR_MSG_MOD(extack, "Failed to set vlan table");
		return err;
	}

	/* change PVID */
	if (vlan->flags & BRIDGE_VLAN_INFO_PVID)
		ksz_pwrite16(dev, port, REG_PORT_DEFAULT_VID, vlan->vid);

	return 0;
}

static int ksz9477_port_vlan_del(struct dsa_switch *ds, int port,
				 const struct switchdev_obj_port_vlan *vlan)
{
	struct ksz_device *dev = ds->priv;
	bool untagged = vlan->flags & BRIDGE_VLAN_INFO_UNTAGGED;
	u32 vlan_table[3];
	u16 pvid;

	ksz_pread16(dev, port, REG_PORT_DEFAULT_VID, &pvid);
	pvid = pvid & 0xFFF;

	if (ksz9477_get_vlan_table(dev, vlan->vid, vlan_table)) {
		dev_dbg(dev->dev, "Failed to get vlan table\n");
		return -ETIMEDOUT;
	}

	vlan_table[2] &= ~BIT(port);

	if (pvid == vlan->vid)
		pvid = 1;

	if (untagged)
		vlan_table[1] &= ~BIT(port);

	if (ksz9477_set_vlan_table(dev, vlan->vid, vlan_table)) {
		dev_dbg(dev->dev, "Failed to set vlan table\n");
		return -ETIMEDOUT;
	}

	ksz_pwrite16(dev, port, REG_PORT_DEFAULT_VID, pvid);

	return 0;
}

static int ksz9477_port_fdb_add(struct dsa_switch *ds, int port,
				const unsigned char *addr, u16 vid)
{
	struct ksz_device *dev = ds->priv;
	u32 alu_table[4];
	u32 data;
	int ret = 0;

	mutex_lock(&dev->alu_mutex);

	/* find any entry with mac & vid */
	data = vid << ALU_FID_INDEX_S;
	data |= ((addr[0] << 8) | addr[1]);
	ksz_write32(dev, REG_SW_ALU_INDEX_0, data);

	data = ((addr[2] << 24) | (addr[3] << 16));
	data |= ((addr[4] << 8) | addr[5]);
	ksz_write32(dev, REG_SW_ALU_INDEX_1, data);

	/* start read operation */
	ksz_write32(dev, REG_SW_ALU_CTRL__4, ALU_READ | ALU_START);

	/* wait to be finished */
	ret = ksz9477_wait_alu_ready(dev);
	if (ret) {
		dev_dbg(dev->dev, "Failed to read ALU\n");
		goto exit;
	}

	/* read ALU entry */
	ksz9477_read_table(dev, alu_table);

	/* update ALU entry */
	alu_table[0] = ALU_V_STATIC_VALID;
	alu_table[1] |= BIT(port);
	if (vid)
		alu_table[1] |= ALU_V_USE_FID;
	alu_table[2] = (vid << ALU_V_FID_S);
	alu_table[2] |= ((addr[0] << 8) | addr[1]);
	alu_table[3] = ((addr[2] << 24) | (addr[3] << 16));
	alu_table[3] |= ((addr[4] << 8) | addr[5]);

	ksz9477_write_table(dev, alu_table);

	ksz_write32(dev, REG_SW_ALU_CTRL__4, ALU_WRITE | ALU_START);

	/* wait to be finished */
	ret = ksz9477_wait_alu_ready(dev);
	if (ret)
		dev_dbg(dev->dev, "Failed to write ALU\n");

exit:
	mutex_unlock(&dev->alu_mutex);

	return ret;
}

static int ksz9477_port_fdb_del(struct dsa_switch *ds, int port,
				const unsigned char *addr, u16 vid)
{
	struct ksz_device *dev = ds->priv;
	u32 alu_table[4];
	u32 data;
	int ret = 0;

	mutex_lock(&dev->alu_mutex);

	/* read any entry with mac & vid */
	data = vid << ALU_FID_INDEX_S;
	data |= ((addr[0] << 8) | addr[1]);
	ksz_write32(dev, REG_SW_ALU_INDEX_0, data);

	data = ((addr[2] << 24) | (addr[3] << 16));
	data |= ((addr[4] << 8) | addr[5]);
	ksz_write32(dev, REG_SW_ALU_INDEX_1, data);

	/* start read operation */
	ksz_write32(dev, REG_SW_ALU_CTRL__4, ALU_READ | ALU_START);

	/* wait to be finished */
	ret = ksz9477_wait_alu_ready(dev);
	if (ret) {
		dev_dbg(dev->dev, "Failed to read ALU\n");
		goto exit;
	}

	ksz_read32(dev, REG_SW_ALU_VAL_A, &alu_table[0]);
	if (alu_table[0] & ALU_V_STATIC_VALID) {
		ksz_read32(dev, REG_SW_ALU_VAL_B, &alu_table[1]);
		ksz_read32(dev, REG_SW_ALU_VAL_C, &alu_table[2]);
		ksz_read32(dev, REG_SW_ALU_VAL_D, &alu_table[3]);

		/* clear forwarding port */
		alu_table[2] &= ~BIT(port);

		/* if there is no port to forward, clear table */
		if ((alu_table[2] & ALU_V_PORT_MAP) == 0) {
			alu_table[0] = 0;
			alu_table[1] = 0;
			alu_table[2] = 0;
			alu_table[3] = 0;
		}
	} else {
		alu_table[0] = 0;
		alu_table[1] = 0;
		alu_table[2] = 0;
		alu_table[3] = 0;
	}

	ksz9477_write_table(dev, alu_table);

	ksz_write32(dev, REG_SW_ALU_CTRL__4, ALU_WRITE | ALU_START);

	/* wait to be finished */
	ret = ksz9477_wait_alu_ready(dev);
	if (ret)
		dev_dbg(dev->dev, "Failed to write ALU\n");

exit:
	mutex_unlock(&dev->alu_mutex);

	return ret;
}

static void ksz9477_convert_alu(struct alu_struct *alu, u32 *alu_table)
{
	alu->is_static = !!(alu_table[0] & ALU_V_STATIC_VALID);
	alu->is_src_filter = !!(alu_table[0] & ALU_V_SRC_FILTER);
	alu->is_dst_filter = !!(alu_table[0] & ALU_V_DST_FILTER);
	alu->prio_age = (alu_table[0] >> ALU_V_PRIO_AGE_CNT_S) &
			ALU_V_PRIO_AGE_CNT_M;
	alu->mstp = alu_table[0] & ALU_V_MSTP_M;

	alu->is_override = !!(alu_table[1] & ALU_V_OVERRIDE);
	alu->is_use_fid = !!(alu_table[1] & ALU_V_USE_FID);
	alu->port_forward = alu_table[1] & ALU_V_PORT_MAP;

	alu->fid = (alu_table[2] >> ALU_V_FID_S) & ALU_V_FID_M;

	alu->mac[0] = (alu_table[2] >> 8) & 0xFF;
	alu->mac[1] = alu_table[2] & 0xFF;
	alu->mac[2] = (alu_table[3] >> 24) & 0xFF;
	alu->mac[3] = (alu_table[3] >> 16) & 0xFF;
	alu->mac[4] = (alu_table[3] >> 8) & 0xFF;
	alu->mac[5] = alu_table[3] & 0xFF;
}

static int ksz9477_port_fdb_dump(struct dsa_switch *ds, int port,
				 dsa_fdb_dump_cb_t *cb, void *data)
{
	struct ksz_device *dev = ds->priv;
	int ret = 0;
	u32 ksz_data;
	u32 alu_table[4];
	struct alu_struct alu;
	int timeout;

	mutex_lock(&dev->alu_mutex);

	/* start ALU search */
	ksz_write32(dev, REG_SW_ALU_CTRL__4, ALU_START | ALU_SEARCH);

	do {
		timeout = 1000;
		do {
			ksz_read32(dev, REG_SW_ALU_CTRL__4, &ksz_data);
			if ((ksz_data & ALU_VALID) || !(ksz_data & ALU_START))
				break;
			usleep_range(1, 10);
		} while (timeout-- > 0);

		if (!timeout) {
			dev_dbg(dev->dev, "Failed to search ALU\n");
			ret = -ETIMEDOUT;
			goto exit;
		}

		/* read ALU table */
		ksz9477_read_table(dev, alu_table);

		ksz9477_convert_alu(&alu, alu_table);

		if (alu.port_forward & BIT(port)) {
			ret = cb(alu.mac, alu.fid, alu.is_static, data);
			if (ret)
				goto exit;
		}
	} while (ksz_data & ALU_START);

exit:

	/* stop ALU search */
	ksz_write32(dev, REG_SW_ALU_CTRL__4, 0);

	mutex_unlock(&dev->alu_mutex);

	return ret;
}

static int ksz9477_port_mdb_add(struct dsa_switch *ds, int port,
				const struct switchdev_obj_port_mdb *mdb)
{
	struct ksz_device *dev = ds->priv;
	u32 static_table[4];
	u32 data;
	int index;
	u32 mac_hi, mac_lo;
	int err = 0;

	mac_hi = ((mdb->addr[0] << 8) | mdb->addr[1]);
	mac_lo = ((mdb->addr[2] << 24) | (mdb->addr[3] << 16));
	mac_lo |= ((mdb->addr[4] << 8) | mdb->addr[5]);

	mutex_lock(&dev->alu_mutex);

	for (index = 0; index < dev->num_statics; index++) {
		/* find empty slot first */
		data = (index << ALU_STAT_INDEX_S) |
			ALU_STAT_READ | ALU_STAT_START;
		ksz_write32(dev, REG_SW_ALU_STAT_CTRL__4, data);

		/* wait to be finished */
		err = ksz9477_wait_alu_sta_ready(dev);
		if (err) {
			dev_dbg(dev->dev, "Failed to read ALU STATIC\n");
			goto exit;
		}

		/* read ALU static table */
		ksz9477_read_table(dev, static_table);

		if (static_table[0] & ALU_V_STATIC_VALID) {
			/* check this has same vid & mac address */
			if (((static_table[2] >> ALU_V_FID_S) == mdb->vid) &&
			    ((static_table[2] & ALU_V_MAC_ADDR_HI) == mac_hi) &&
			    static_table[3] == mac_lo) {
				/* found matching one */
				break;
			}
		} else {
			/* found empty one */
			break;
		}
	}

	/* no available entry */
	if (index == dev->num_statics) {
		err = -ENOSPC;
		goto exit;
	}

	/* add entry */
	static_table[0] = ALU_V_STATIC_VALID;
	static_table[1] |= BIT(port);
	if (mdb->vid)
		static_table[1] |= ALU_V_USE_FID;
	static_table[2] = (mdb->vid << ALU_V_FID_S);
	static_table[2] |= mac_hi;
	static_table[3] = mac_lo;

	ksz9477_write_table(dev, static_table);

	data = (index << ALU_STAT_INDEX_S) | ALU_STAT_START;
	ksz_write32(dev, REG_SW_ALU_STAT_CTRL__4, data);

	/* wait to be finished */
	if (ksz9477_wait_alu_sta_ready(dev))
		dev_dbg(dev->dev, "Failed to read ALU STATIC\n");

exit:
	mutex_unlock(&dev->alu_mutex);
	return err;
}

static int ksz9477_port_mdb_del(struct dsa_switch *ds, int port,
				const struct switchdev_obj_port_mdb *mdb)
{
	struct ksz_device *dev = ds->priv;
	u32 static_table[4];
	u32 data;
	int index;
	int ret = 0;
	u32 mac_hi, mac_lo;

	mac_hi = ((mdb->addr[0] << 8) | mdb->addr[1]);
	mac_lo = ((mdb->addr[2] << 24) | (mdb->addr[3] << 16));
	mac_lo |= ((mdb->addr[4] << 8) | mdb->addr[5]);

	mutex_lock(&dev->alu_mutex);

	for (index = 0; index < dev->num_statics; index++) {
		/* find empty slot first */
		data = (index << ALU_STAT_INDEX_S) |
			ALU_STAT_READ | ALU_STAT_START;
		ksz_write32(dev, REG_SW_ALU_STAT_CTRL__4, data);

		/* wait to be finished */
		ret = ksz9477_wait_alu_sta_ready(dev);
		if (ret) {
			dev_dbg(dev->dev, "Failed to read ALU STATIC\n");
			goto exit;
		}

		/* read ALU static table */
		ksz9477_read_table(dev, static_table);

		if (static_table[0] & ALU_V_STATIC_VALID) {
			/* check this has same vid & mac address */

			if (((static_table[2] >> ALU_V_FID_S) == mdb->vid) &&
			    ((static_table[2] & ALU_V_MAC_ADDR_HI) == mac_hi) &&
			    static_table[3] == mac_lo) {
				/* found matching one */
				break;
			}
		}
	}

	/* no available entry */
	if (index == dev->num_statics)
		goto exit;

	/* clear port */
	static_table[1] &= ~BIT(port);

	if ((static_table[1] & ALU_V_PORT_MAP) == 0) {
		/* delete entry */
		static_table[0] = 0;
		static_table[1] = 0;
		static_table[2] = 0;
		static_table[3] = 0;
	}

	ksz9477_write_table(dev, static_table);

	data = (index << ALU_STAT_INDEX_S) | ALU_STAT_START;
	ksz_write32(dev, REG_SW_ALU_STAT_CTRL__4, data);

	/* wait to be finished */
	ret = ksz9477_wait_alu_sta_ready(dev);
	if (ret)
		dev_dbg(dev->dev, "Failed to read ALU STATIC\n");

exit:
	mutex_unlock(&dev->alu_mutex);

	return ret;
}

static int ksz9477_port_mirror_add(struct dsa_switch *ds, int port,
				   struct dsa_mall_mirror_tc_entry *mirror,
				   bool ingress)
{
	struct ksz_device *dev = ds->priv;

	if (ingress)
		ksz_port_cfg(dev, port, P_MIRROR_CTRL, PORT_MIRROR_RX, true);
	else
		ksz_port_cfg(dev, port, P_MIRROR_CTRL, PORT_MIRROR_TX, true);

	ksz_port_cfg(dev, port, P_MIRROR_CTRL, PORT_MIRROR_SNIFFER, false);

	/* configure mirror port */
	ksz_port_cfg(dev, mirror->to_local_port, P_MIRROR_CTRL,
		     PORT_MIRROR_SNIFFER, true);

	ksz_cfg(dev, S_MIRROR_CTRL, SW_MIRROR_RX_TX, false);

	return 0;
}

static void ksz9477_port_mirror_del(struct dsa_switch *ds, int port,
				    struct dsa_mall_mirror_tc_entry *mirror)
{
	struct ksz_device *dev = ds->priv;
	u8 data;

	if (mirror->ingress)
		ksz_port_cfg(dev, port, P_MIRROR_CTRL, PORT_MIRROR_RX, false);
	else
		ksz_port_cfg(dev, port, P_MIRROR_CTRL, PORT_MIRROR_TX, false);

	ksz_pread8(dev, port, P_MIRROR_CTRL, &data);

	if (!(data & (PORT_MIRROR_RX | PORT_MIRROR_TX)))
		ksz_port_cfg(dev, mirror->to_local_port, P_MIRROR_CTRL,
			     PORT_MIRROR_SNIFFER, false);
}

static bool ksz9477_get_gbit(struct ksz_device *dev, u8 data)
{
	bool gbit;

	if (dev->features & NEW_XMII)
		gbit = !(data & PORT_MII_NOT_1GBIT);
	else
		gbit = !!(data & PORT_MII_1000MBIT_S1);
	return gbit;
}

static void ksz9477_set_gbit(struct ksz_device *dev, bool gbit, u8 *data)
{
	if (dev->features & NEW_XMII) {
		if (gbit)
			*data &= ~PORT_MII_NOT_1GBIT;
		else
			*data |= PORT_MII_NOT_1GBIT;
	} else {
		if (gbit)
			*data |= PORT_MII_1000MBIT_S1;
		else
			*data &= ~PORT_MII_1000MBIT_S1;
	}
}

static int ksz9477_get_xmii(struct ksz_device *dev, u8 data)
{
	int mode;

	if (dev->features & NEW_XMII) {
		switch (data & PORT_MII_SEL_M) {
		case PORT_MII_SEL:
			mode = 0;
			break;
		case PORT_RMII_SEL:
			mode = 1;
			break;
		case PORT_GMII_SEL:
			mode = 2;
			break;
		default:
			mode = 3;
		}
	} else {
		switch (data & PORT_MII_SEL_M) {
		case PORT_MII_SEL_S1:
			mode = 0;
			break;
		case PORT_RMII_SEL_S1:
			mode = 1;
			break;
		case PORT_GMII_SEL_S1:
			mode = 2;
			break;
		default:
			mode = 3;
		}
	}
	return mode;
}

static void ksz9477_set_xmii(struct ksz_device *dev, int mode, u8 *data)
{
	u8 xmii;

	if (dev->features & NEW_XMII) {