/*
 * This is the driver for the GMAC on-chip Ethernet controller for ST SoCs.
 * DWC Ether MAC version 4.00  has been used for developing this code.
 *
 * This only implements the mac core functions for this chip.
 *
 * Copyright (C) 2015  STMicroelectronics Ltd
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms and conditions of the GNU General Public License,
 * version 2, as published by the Free Software Foundation.
 *
 * Author: Alexandre Torgue <alexandre.torgue@st.com>
 */

#include <linux/crc32.h>
#include <linux/slab.h>
#include <linux/ethtool.h>
#include <linux/io.h>
#include "stmmac_pcs.h"
#include "dwmac4.h"

static void dwmac4_core_init(struct mac_device_info *hw, int mtu)
{
	void __iomem *ioaddr = hw->pcsr;
	u32 value = readl(ioaddr + GMAC_CONFIG);

	value |= GMAC_CORE_INIT;

	if (mtu > 1500)
		value |= GMAC_CONFIG_2K;
	if (mtu > 2000)
		value |= GMAC_CONFIG_JE;

	if (hw->ps) {
		value |= GMAC_CONFIG_TE;

		value &= hw->link.speed_mask;
		switch (hw->ps) {
		case SPEED_1000:
			value |= hw->link.speed1000;
			break;
		case SPEED_100:
			value |= hw->link.speed100;
			break;
		case SPEED_10:
			value |= hw->link.speed10;
			break;
		}
	}

	writel(value, ioaddr + GMAC_CONFIG);

	/* Mask GMAC interrupts */
	value = GMAC_INT_DEFAULT_MASK;
	if (hw->pmt)
		value |= GMAC_INT_PMT_EN;
	if (hw->pcs)
		value |= GMAC_PCS_IRQ_DEFAULT;

	writel(value, ioaddr + GMAC_INT_EN);
}

static void dwmac4_rx_queue_enable(struct mac_device_info *hw,
				   u8 mode, u32 queue)
{
	void __iomem *ioaddr = hw->pcsr;
	u32 value = readl(ioaddr + GMAC_RXQ_CTRL0);

	value &= GMAC_RX_QUEUE_CLEAR(queue);
	if (mode == MTL_QUEUE_AVB)
		value |= GMAC_RX_AV_QUEUE_ENABLE(queue);
	else if (mode == MTL_QUEUE_DCB)
		value |= GMAC_RX_DCB_QUEUE_ENABLE(queue);

	writel(value, ioaddr + GMAC_RXQ_CTRL0);
}

static void dwmac4_rx_queue_priority(struct mac_device_info *hw,
				     u32 prio, u32 queue)
{
	void __iomem *ioaddr = hw->pcsr;
	u32 base_register;
	u32 value;

	base_register = (queue < 4) ? GMAC_RXQ_CTRL2 : GMAC_RXQ_CTRL3;

	value = readl(ioaddr + base_register);

	value &= ~GMAC_RXQCTRL_PSRQX_MASK(queue);
	value |= (prio << GMAC_RXQCTRL_PSRQX_SHIFT(queue)) &
						GMAC_RXQCTRL_PSRQX_MASK(queue);
	writel(value, ioaddr + base_register);
}

static void dwmac4_tx_queue_priority(struct mac_device_info *hw,
				     u32 prio, u32 queue)
{
	void __iomem *ioaddr = hw->pcsr;
	u32 base_register;
	u32 value;

	base_register = (queue < 4) ? GMAC_TXQ_PRTY_MAP0 : GMAC_TXQ_PRTY_MAP1;

	value = readl(ioaddr + base_register);

	value &= ~GMAC_TXQCTRL_PSTQX_MASK(queue);
	value |= (prio << GMAC_TXQCTRL_PSTQX_SHIFT(queue)) &
						GMAC_TXQCTRL_PSTQX_MASK(queue);

	writel(value, ioaddr + base_register);
}

static void dwmac4_tx_queue_routing(struct mac_device_info *hw,
				    u8 packet, u32 queue)
{
	void __iomem *ioaddr = hw->pcsr;
	u32 value;

	static const struct stmmac_rx_routing route_possibilities[] = {
		{ GMAC_RXQCTRL_AVCPQ_MASK, GMAC_RXQCTRL_AVCPQ_SHIFT },
		{ GMAC_RXQCTRL_PTPQ_MASK, GMAC_RXQCTRL_PTPQ_SHIFT },
		{ GMAC_RXQCTRL_DCBCPQ_MASK, GMAC_RXQCTRL_DCBCPQ_SHIFT },
		{ GMAC_RXQCTRL_UPQ_MASK, GMAC_RXQCTRL_UPQ_SHIFT },
		{ GMAC_RXQCTRL_MCBCQ_MASK, GMAC_RXQCTRL_MCBCQ_SHIFT },
	};

	value = readl(ioaddr + GMAC_RXQ_CTRL1);

	/* routing configuration */
	value &= ~route_possibilities[packet - 1].reg_mask;
	value |= (queue << route_possibilities[packet-1].reg_shift) &
		 route_possibilities[packet - 1].reg_mask;

	/* some packets require extra ops */
	if (packet == PACKET_AVCPQ) {
		value &= ~GMAC_RXQCTRL_TACPQE;
		value |= 0x1 << GMAC_RXQCTRL_TACPQE_SHIFT;
	} else if (packet == PACKET_MCBCQ) {
		value &= ~GMAC_RXQCTRL_MCBCQEN;
		value |= 0x1 << GMAC_RXQCTRL_MCBCQEN_SHIFT;
	}

	writel(value, ioaddr + GMAC_RXQ_CTRL1);
}

static void dwmac4_prog_mtl_rx_algorithms(struct mac_device_info *hw,
					  u32 rx_alg)
{
	void __iomem *ioaddr = hw->pcsr;
	u32 value = readl(ioaddr + MTL_OPERATION_MODE);

	value &= ~MTL_OPERATION_RAA;
	switch (rx_alg) {
	case MTL_RX_ALGORITHM_SP:
		value |= MTL_OPERATION_RAA_SP;
		break;
	case MTL_RX_ALGORITHM_WSP:
		value |= MTL_OPERATION_RAA_WSP;
		break;
	default:
		break;
	}

	writel(value, ioaddr + MTL_OPERATION_MODE);
}

static void dwmac4_prog_mtl_tx_algorithms(struct mac_device_info *hw,
					  u32 tx_alg)
{
	void __iomem *ioaddr = hw->pcsr;
	u32 value = readl(ioaddr + MTL_OPERATION_MODE);

	value &= ~MTL_OPERATION_SCHALG_MASK;
	switch (tx_alg) {
	case MTL_TX_ALGORITHM_WRR:
		value |= MTL_OPERATION_SCHALG_WRR;
		break;
	case MTL_TX_ALGORITHM_WFQ:
		value |= MTL_OPERATION_SCHALG_WFQ;
		break;
	case MTL_TX_ALGORITHM_DWRR:
		value |= MTL_OPERATION_SCHALG_DWRR;
		break;
	case MTL_TX_ALGORITHM_SP:
		value |= MTL_OPERATION_SCHALG_SP;
		break;
	default:
		break;
	}
}

static void dwmac4_set_mtl_tx_queue_weight(struct mac_device_info *hw,
					   u32 weight, u32 queue)
{
	void __iomem *ioaddr = hw->pcsr;
	u32 value = readl(ioaddr + MTL_TXQX_WEIGHT_BASE_ADDR(queue));

	value &= ~MTL_TXQ_WEIGHT_ISCQW_MASK;
	value |= weight & MTL_TXQ_WEIGHT_ISCQW_MASK;
	writel(value, ioaddr + MTL_TXQX_WEIGHT_BASE_ADDR(queue));
}

static void dwmac4_map_mtl_dma(struct mac_device_info *hw, u32 queue, u32 chan)
{
	void __iomem *ioaddr = hw->pcsr;
	u32 value;

	if (queue < 4)
		value = readl(ioaddr + MTL_RXQ_DMA_MAP0);
	else
		value = readl(ioaddr + MTL_RXQ_DMA_MAP1);

	if (queue == 0 || queue == 4) {
		value &= ~MTL_RXQ_DMA_Q04MDMACH_MASK;
		value |= MTL_RXQ_DMA_Q04MDMACH(chan);
	} else {
		value &= ~MTL_RXQ_DMA_QXMDMACH_MASK(queue);
		value |= MTL_RXQ_DMA_QXMDMACH(chan, queue);
	}

	if (queue < 4)
		writel(value, ioaddr + MTL_RXQ_DMA_MAP0);
	else
		writel(value, ioaddr + MTL_RXQ_DMA_MAP1);
}

static void dwmac4_config_cbs(struct mac_device_info *hw,
			      u32 send_slope, u32 idle_slope,
			      u32 high_credit, u32 low_credit, u32 queue)
{
	void __iomem *ioaddr = hw->pcsr;
	u32 value;

	pr_debug("Queue %d configured as AVB. Parameters:\n", queue);
	pr_debug("\tsend_slope: 0x%08x\n", send_slope);
	pr_debug("\tidle_slope: 0x%08x\n", idle_slope);
	pr_debug("\thigh_credit: 0x%08x\n", high_credit);
	pr_debug("\tlow_credit: 0x%08x\n", low_credit);

	/* enable AV algorithm */
	value = readl(ioaddr + MTL_ETSX_CTRL_BASE_ADDR(queue));
	value |= MTL_ETS_CTRL_AVALG;
	value |= MTL_ETS_CTRL_CC;
	writel(value, ioaddr + MTL_ETSX_CTRL_BASE_ADDR(queue));

	/* configure send slope */
	value = readl(ioaddr + MTL_SEND_SLP_CREDX_BASE_ADDR(queue));
	value &= ~MTL_SEND_SLP_CRED_SSC_MASK;
	value |= send_slope & MTL_SEND_SLP_CRED_SSC_MASK;
	writel(value, ioaddr + MTL_SEND_SLP_CREDX_BASE_ADDR(queue));

	/* configure idle slope (same register as tx weight) */
	dwmac4_set_mtl_tx_queue_weight(hw, idle_slope, queue);

	/* configure high credit */
	value = readl(ioaddr + MTL_HIGH_CREDX_BASE_ADDR(queue));
	value &= ~MTL_HIGH_CRED_HC_MASK;
	value |= high_credit & MTL_HIGH_CRED_HC_MASK;
	writel(value, ioaddr + MTL_HIGH_CREDX_BASE_ADDR(queue));

	/* configure high credit */
	value = readl(ioaddr + MTL_LOW_CREDX_BASE_ADDR(queue));
	value &= ~MTL_HIGH_CRED_LC_MASK;
	value |= low_credit & MTL_HIGH_CRED_LC_MASK;
	writel(value, ioaddr + MTL_LOW_CREDX_BASE_ADDR(queue));
}

static void dwmac4_dump_regs(struct mac_device_info *hw, u32 *reg_space)
{
	void __iomem *ioaddr = hw->pcsr;
	int i;

	for (i = 0; i < GMAC_REG_NUM; i++)
		reg_space[i] = readl(ioaddr + i * 4);
}

static int dwmac4_rx_ipc_enable(struct mac_device_info *hw)
{
	void __iomem *ioaddr = hw->pcsr;
	u32 value = readl(ioaddr + GMAC_CONFIG);

	if (hw->rx_csum)
		value |= GMAC_CONFIG_IPC;
	else
		value &= ~GMAC_CONFIG_IPC;

	writel(value, ioaddr + GMAC_CONFIG);

	value = readl(ioaddr + GMAC_CONFIG);

	return !!(value & GMAC_CONFIG_IPC);
}

static void dwmac4_pmt(struct mac_device_info *hw, unsigned long mode)
{
	void __iomem *ioaddr = hw->pcsr;
	unsigned int pmt = 0;

	if (mode & WAKE_MAGIC) {
		pr_debug("GMAC: WOL Magic frame\n");
		pmt |= power_down | magic_pkt_en;
	}
	if (mode & WAKE_UCAST) {
		pr_debug("GMAC: WOL on global unicast\n");
		pmt |= power_down | global_unicast | wake_up_frame_en;
	}

	writel(pmt, ioaddr + GMAC_PMT);
}

static void dwmac4_set_umac_addr(struct mac_device_info *hw,
				 unsigned char *addr, unsigned int reg_n)
{
	void __iomem *ioaddr = hw->pcsr;

	stmmac_dwmac4_set_mac_addr(ioaddr, addr, GMAC_ADDR_HIGH(reg_n),
				   GMAC_ADDR_LOW(reg_n));
}

static void dwmac4_get_umac_addr(struct mac_device_info *hw,
				 unsigned char *addr, unsigned int reg_n)
{
	void __iomem *ioaddr = hw->pcsr;

	stmmac_dwmac4_get_mac_addr(ioaddr, addr, GMAC_ADDR_HIGH(reg_n),
				   GMAC_ADDR_LOW(reg_n));
}

static void dwmac4_set_eee_mode(struct mac_device_info *hw,
				bool en_tx_lpi_clockgating)
{
	void __iomem *ioaddr = hw->pcsr;
	u32 value;

	/* Enable the link status receive on RGMII, SGMII ore SMII
	 * receive path and instruct the transmit to enter in LPI
	 * state.
	 */
	value = readl(ioaddr + GMAC4_LPI_CTRL_STATUS);
	value |= GMAC4_LPI_CTRL_STATUS_LPIEN | GMAC4_LPI_CTRL_STATUS_LPITXA;

	if (en_tx_lpi_clockgating)
		value |= GMAC4_LPI_CTRL_STATUS_LPITCSE;

	writel(value, ioaddr + GMAC4_LPI_CTRL_STATUS);
}

static void dwmac4_reset_eee_mode(struct mac_device_info *hw)
{
	void __iomem *ioaddr = hw->pcsr;
	u32 value;

	value = readl(ioaddr + GMAC4_LPI_CTRL_STATUS);
	value &= ~(GMAC4_LPI_CTRL_STATUS_LPIEN | GMAC4_LPI_CTRL_STATUS_LPITXA);
	writel(value, ioaddr + GMAC4_LPI_CTRL_STATUS);
}

static void dwmac4_set_eee_pls(struct mac_device_info *hw, int link)
{
	void __iomem *ioaddr = hw->pcsr;
	u32 value;

	value = readl(ioaddr + GMAC4_LPI_CTRL_STATUS);

	if (link)
		value |= GMAC4_LPI_CTRL_STATUS_PLS;
	else
		value &= ~GMAC4_LPI_CTRL_STATUS_PLS;

	writel(value, ioaddr + GMAC4_LPI_CTRL_STATUS);
}

static void dwmac4_set_eee_timer(struct mac_device_info *hw, int ls, int tw)
{
	void __iomem *ioaddr = hw->pcsr;
	int value = ((tw & 0xffff)) | ((ls & 0x3ff) << 16);

	/* Program the timers in the LPI timer control register:
	 * LS: minimum time (ms) for which the link
	 *  status from PHY should be ok before transmitting
	 *  the LPI pattern.
	 * TW: minimum time (us) for which the core waits
	 *  after it has stopped transmitting the LPI pattern.
	 */
	writel(value, ioaddr + GMAC4_LPI_TIMER_CTRL);
}

static void dwmac4_set_filter(struct mac_device_info *hw,
			      struct net_device *dev)
{
	void __iomem *ioaddr = (void __iomem *)dev->base_addr;
	unsigned int value = 0;

	if (dev->flags & IFF_PROMISC) {
		value = GMAC_PACKET_FILTER_PR;
	} else if ((dev->flags & IFF_ALLMULTI) ||
			(netdev_mc_count(dev) > HASH_TABLE_SIZE)) {
		/* Pass all multi */
		value = GMAC_PACKET_FILTER_PM;
		/* Set the 64 bits of the HASH tab. To be updated if taller
		 * hash table is used
		 */
		writel(0xffffffff, ioaddr + GMAC_HASH_TAB_0_31);
		writel(0xffffffff, ioaddr + GMAC_HASH_TAB_32_63);
	} else if (!netdev_mc_empty(dev)) {
		u32 mc_filter[2];
		struct netdev_hw_addr *ha;

		/* Hash filter for multicast */
		value = GMAC_PACKET_FILTER_HMC;

		memset(mc_filter, 0, sizeof(mc_filter));
		netdev_for_each_mc_addr(ha, dev) {
			/* The upper 6 bits of the calculated CRC are used to
			 * index the content of the Hash Table Reg 0 and 1.
			 */
			int bit_nr =
				(bitrev32(~crc32_le(~0, ha->addr, 6)) >> 26);
			/* The most significant bit determines the register
			 * to use while the other 5 bits determines the bit
			 * within the selected register
			 */
			mc_filter[bit_nr >> 5] |= (1 << (bit_nr & 0x1F));
		}
		writel(mc_filter[0], ioaddr + GMAC_HASH_TAB_0_31);
		writel(mc_filter[1], ioaddr + GMAC_HASH_TAB_32_63);
	}

	/* Handle multiple unicast addresses */
	if (netdev_uc_count(dev) > GMAC_MAX_PERFECT_ADDRESSES) {
		/* Switch to promiscuous mode if more than 128 addrs
		 * are required
		 */
		value |= GMAC_PACKET_FILTER_PR;
	} else if (!netdev_uc_empty(dev)) {
		int reg = 1;
		struct netdev_hw_addr *ha;

		netdev_for_each_uc_addr(ha, dev) {
			dwmac4_set_umac_addr(hw, ha->addr, reg);
			reg++;
		}
	}

	writel(value, ioaddr + GMAC_PACKET_FILTER);
}

static void dwmac4_flow_ctrl(struct mac_device_info *hw, unsigned int duplex,
			     unsigned int fc, unsigned int pause_time,
			     u32 tx_cnt)
{
	void __iomem *ioaddr = hw->pcsr;
	unsigned int flow = 0;
	u32 queue = 0;

	pr_debug("GMAC Flow-Control:\n");
	if (fc & FLOW_RX) {
		pr_debug("\tReceive Flow-Control ON\n");
		flow |= GMAC_RX_FLOW_CTRL_RFE;
		writel(flow, ioaddr + GMAC_RX_FLOW_CTRL);
	}
	if (fc & FLOW_TX) {
		pr_debug("\tTransmit Flow-Control ON\n");

		if (duplex)
			pr_debug("\tduplex mode: PAUSE %d\n", pause_time);

		for (queue = 0; queue < tx_cnt; queue++) {
			flow |= GMAC_TX_FLOW_CTRL_TFE;

			if (duplex)
				flow |=
				(pause_time << GMAC_TX_FLOW_CTRL_PT_SHIFT);

			writel(flow, ioaddr + GMAC_QX_TX_FLOW_CTRL(queue));
		}
	}
}

static void dwmac4_ctrl_ane(void __iomem *ioaddr, bool ane, bool srgmi_ral,
			    bool loopback)
{
	dwmac_ctrl_ane(ioaddr, GMAC_PCS_BASE, ane, srgmi_ral, loopback);
}

static void dwmac4_rane(void __iomem *ioaddr, bool restart)
{
	dwmac_rane(ioaddr, GMAC_PCS_BASE, restart);
}

static void dwmac4_get_adv_lp(void __iomem *ioaddr, struct rgmii_adv *adv)
{
	dwmac_get_adv_lp(ioaddr, GMAC_PCS_BASE, adv);
}

/* RGMII or SMII interface */
static void dwmac4_phystatus(void __iomem *ioaddr, struct stmmac_extra_stats *x)
{
	u32 status;

	status = readl(ioaddr + GMAC_PHYIF_CONTROL_STATUS);
	x->irq_rgmii_n++;

	/* Check the link status */
	if (status & GMAC_PHYIF_CTRLSTATUS_LNKSTS) {
		int speed_value;

		x->pcs_link = 1;

		speed_value = ((status & GMAC_PHYIF_CTRLSTATUS_SPEED) >>
			       GMAC_PHYIF_CTRLSTATUS_SPEED_SHIFT);
		if (speed_value == GMAC_PHYIF_CTRLSTATUS_SPEED_125)
			x->pcs_speed = SPEED_1000;
		else if (speed_value == GMAC_PHYIF_CTRLSTATUS_SPEED_25)
			x->pcs_speed = SPEED_100;
		else
			x->pcs_speed = SPEED_10;

		x->pcs_duplex = (status & GMAC_PHYIF_CTRLSTATUS_LNKMOD_MASK);

		pr_info("Link is Up - %d/%s\n", (int)x->pcs_speed,
			x->pcs_duplex ? "Full" : "Half");
	} else {
		x->pcs_link = 0;
		pr_info("Link is Down\n");
	}
}

static int dwmac4_irq_mtl_status(struct mac_device_info *hw, u32 chan)
{
	void __iomem *ioaddr = hw->pcsr;
	u32 mtl_int_qx_status;
	int ret = 0;

	mtl_int_qx_status = readl(ioaddr + MTL_INT_STATUS);

	/* Check MTL Interrupt */
	if (mtl_int_qx_status & MTL_INT_QX(chan)) {
		/* read Queue x Interrupt status */
		u32 status = readl(ioaddr + MTL_CHAN_INT_CTRL(chan));

		if (status & MTL_RX_OVERFLOW_INT) {
			/*  clear Interrupt */
			writel(status | MTL_RX_OVERFLOW_INT,
			       ioaddr + MTL_CHAN_INT_CTRL(chan));
			ret = CORE_IRQ_MTL_RX_OVERFLOW;
		}
	}

	return ret;
}

static int dwmac4_irq_status(struct mac_device_info *hw,
			     struct stmmac_extra_stats *x)
{
	void __iomem *ioaddr = hw->pcsr;
	u32 intr_status;
	int ret = 0;

	intr_status = readl(ioaddr + GMAC_INT_STATUS);

	/* Not used events (e.g. MMC interrupts) are not handled. */
	if ((intr_status & mmc_tx_irq))
		x->mmc_tx_irq_n++;
	if (unlikely(intr_status & mmc_rx_irq))
		x->mmc_rx_irq_n++;
	if (unlikely(intr_status & mmc_rx_csum_offload_irq))
		x->mmc_rx_csum_offload_irq_n++;
	/* Clear the PMT bits 5 and 6 by reading the PMT status reg */
	if (unlikely(intr_status & pmt_irq)) {
		readl(ioaddr + GMAC_PMT);
		x->irq_receive_pmt_irq_n++;
	}

	dwmac_pcs_isr(ioaddr, GMAC_PCS_BASE, intr_status, x);
	if (intr_status & PCS_RGSMIIIS_IRQ)
		dwmac4_phystatus(ioaddr, x);

	return ret;
}

static void dwmac4_debug(void __iomem *ioaddr, struct stmmac_extra_stats *x,
			 u32 rx_queues, u32 tx_queues)
{
	u32 value;
	u32 queue;

	for (queue = 0; queue < tx_queues; queue++) {
		value = readl(ioaddr + MTL_CHAN_TX_DEBUG(queue));

		if (value & MTL_DEBUG_TXSTSFSTS)
			x->mtl_tx_status_fifo_full++;
		if (value & MTL_DEBUG_TXFSTS)
			x->mtl_tx_fifo_not_empty++;
		if (value & MTL_DEBUG_TWCSTS)
			x->mmtl_fifo_ctrl++;
		if (value & MTL_DEBUG_TRCSTS_MASK) {
			u32 trcsts = (value & MTL_DEBUG_TRCSTS_MASK)
				     >> MTL_DEBUG_TRCSTS_SHIFT;
			if (trcsts == MTL_DEBUG_TRCSTS_WRITE)
				x->mtl_tx_fifo_read_ctrl_write++;
			else if (trcsts == MTL_DEBUG_TRCSTS_TXW)
				x->mtl_tx_fifo_read_ctrl_wait++;
			else if (trcsts == MTL_DEBUG_TRCSTS_READ)
				x->mtl_tx_fifo_read_ctrl_read++;
			else
				x->mtl_tx_fifo_read_ctrl_idle++;
		}
		if (value & MTL_DEBUG_TXPAUSED)
			x->mac_tx_in_pause++;
	}

	for (queue = 0; queue < rx_queues; queue++) {
		value = readl(ioaddr + MTL_CHAN_RX_DEBUG(queue));

		if (value & MTL_DEBUG_RXFSTS_MASK) {
			u32 rxfsts = (value & MTL_DEBUG_RXFSTS_MASK)
				     >> MTL_DEBUG_RRCSTS_SHIFT;

			if (rxfsts == MTL_DEBUG_RXFSTS_FULL)
				x->mtl_rx_fifo_fill_level_full++;
			else if (rxfsts == MTL_DEBUG_RXFSTS_AT)
				x->mtl_rx_fifo_fill_above_thresh++;
			else if (rxfsts == MTL_DEBUG_RXFSTS_BT)
				x->mtl_rx_fifo_fill_below_thresh++;
			else
				x->mtl_rx_fifo_fill_level_empty++;
		}
		if (value & MTL_DEBUG_RRCSTS_MASK) {
			u32 rrcsts = (value & MTL_DEBUG_RRCSTS_MASK) >>
				     MTL_DEBUG_RRCSTS_SHIFT;

			if (rrcsts == MTL_DEBUG_RRCSTS_FLUSH)
				x->mtl_rx_fifo_read_ctrl_flush++;
			else if (rrcsts == MTL_DEBUG_RRCSTS_RSTAT)
				x->mtl_rx_fifo_read_ctrl_read_data++;
			else if (rrcsts == MTL_DEBUG_RRCSTS_RDATA)
				x->mtl_rx_fifo_read_ctrl_status++;
			else
				x->mtl_rx_fifo_read_ctrl_idle++;
		}
		if (value & MTL_DEBUG_RWCSTS)
			x->mtl_rx_fifo_ctrl_active++;
	}

	/* GMAC debug */
	value = readl(ioaddr + GMAC_DEBUG);

	if (value & GMAC_DEBUG_TFCSTS_MASK) {
		u32 tfcsts = (value & GMAC_DEBUG_TFCSTS_MASK)
			      >> GMAC_DEBUG_TFCSTS_SHIFT;

		if (tfcsts == GMAC_DEBUG_TFCSTS_XFER)
			x->mac_tx_frame_ctrl_xfer++;
		else if (tfcsts == GMAC_DEBUG_TFCSTS_GEN_PAUSE)
			x->mac_tx_frame_ctrl_pause++;
		else if (tfcsts == GMAC_DEBUG_TFCSTS_WAIT)
			x->mac_tx_frame_ctrl_wait++;
		else
			x->mac_tx_frame_ctrl_idle++;
	}
	if (value & GMAC_DEBUG_TPESTS)
		x->mac_gmii_tx_proto_engine++;
	if (value & GMAC_DEBUG_RFCFCSTS_MASK)
		x->mac_rx_frame_ctrl_fifo = (value & GMAC_DEBUG_RFCFCSTS_MASK)
					    >> GMAC_DEBUG_RFCFCSTS_SHIFT;
	if (value & GMAC_DEBUG_RPESTS)
		x->mac_gmii_rx_proto_engine++;
}

static const struct stmmac_ops dwmac4_ops = {
	.core_init = dwmac4_core_init,
	.set_mac = stmmac_set_mac,
	.rx_ipc = dwmac4_rx_ipc_enable,
	.rx_queue_enable = dwmac4_rx_queue_enable,
	.rx_queue_prio = dwmac4_rx_queue_priority,
	.tx_queue_prio = dwmac4_tx_queue_priority,
	.rx_queue_routing = dwmac4_tx_queue_routing,
	.prog_mtl_rx_algorithms = dwmac4_prog_mtl_rx_algorithms,
	.prog_mtl_tx_algorithms = dwmac4_prog_mtl_tx_algorithms,
	.set_mtl_tx_queue_weight = dwmac4_set_mtl_tx_queue_weight,
	.map_mtl_to_dma = dwmac4_map_mtl_dma,
	.config_cbs = dwmac4_config_cbs,
	.dump_regs = dwmac4_dump_regs,
	.host_irq_status = dwmac4_irq_status,
	.host_mtl_irq_status = dwmac4_irq_mtl_status,
	.flow_ctrl = dwmac4_flow_ctrl,
	.pmt = dwmac4_pmt,
	.set_umac_addr = dwmac4_set_umac_addr,
	.get_umac_addr = dwmac4_get_umac_addr,
	.set_eee_mode = dwmac4_set_eee_mode,
	.reset_eee_mode = dwmac4_reset_eee_mode,
	.set_eee_timer = dwmac4_set_eee_timer,
	.set_eee_pls = dwmac4_set_eee_pls,
	.pcs_ctrl_ane = dwmac4_ctrl_ane,
	.pcs_rane = dwmac4_rane,
	.pcs_get_adv_lp = dwmac4_get_adv_lp,
	.debug = dwmac4_debug,
	.set_filter = dwmac4_set_filter,
};

static const struct stmmac_ops dwmac410_ops = {
	.core_init = dwmac4_core_init,
	.set_mac = stmmac_dwmac4_set_mac,
	.rx_ipc = dwmac4_rx_ipc_enable,
	.rx_queue_enable = dwmac4_rx_queue_enable,
	.rx_queue_prio = dwmac4_rx_queue_priority,
	.tx_queue_prio = dwmac4_tx_queue_priority,
	.rx_queue_routing = dwmac4_tx_queue_routing,
	.prog_mtl_rx_algorithms = dwmac4_prog_mtl_rx_algorithms,
	.prog_mtl_tx_algorithms = dwmac4_prog_mtl_tx_algorithms,
	.set_mtl_tx_queue_weight = dwmac4_set_mtl_tx_queue_weight,
	.map_mtl_to_dma = dwmac4_map_mtl_dma,
	.config_cbs = dwmac4_config_cbs,
	.dump_regs = dwmac4_dump_regs,
	.host_irq_status = dwmac4_irq_status,
	.host_mtl_irq_status = dwmac4_irq_mtl_status,
	.flow_ctrl = dwmac4_flow_ctrl,
	.pmt = dwmac4_pmt,
	.set_umac_addr = dwmac4_set_umac_addr,
	.get_umac_addr = dwmac4_get_umac_addr,
	.set_eee_mode = dwmac4_set_eee_mode,
	.reset_eee_mode = dwmac4_reset_eee_mode,
	.set_eee_timer = dwmac4_set_eee_timer,
	.set_eee_pls = dwmac4_set_eee_pls,
	.pcs_ctrl_ane = dwmac4_ctrl_ane,
	.pcs_rane = dwmac4_rane,
	.pcs_get_adv_lp = dwmac4_get_adv_lp,
	.debug = dwmac4_debug,
	.set_filter = dwmac4_set_filter,
};

struct mac_device_info *dwmac4_setup(void __iomem *ioaddr, int mcbins,
				     int perfect_uc_entries, int *synopsys_id)
{
	struct mac_device_info *mac;
	u32 hwid = readl(ioaddr + GMAC_VERSION);

	mac = kzalloc(sizeof(const struct mac_device_info), GFP_KERNEL);
	if (!mac)
		return NULL;

	mac->pcsr = ioaddr;
	mac->multicast_filter_bins = mcbins;
	mac->unicast_filter_entries = perfect_uc_entries;
	mac->mcast_bits_log2 = 0;

	if (mac->multicast_filter_bins)
		mac->mcast_bits_log2 = ilog2(mac->multicast_filter_bins);

	mac->link.duplex = GMAC_CONFIG_DM;
	mac->link.speed10 = GMAC_CONFIG_PS;
	mac->link.speed100 = GMAC_CONFIG_FES | GMAC_CONFIG_PS;
	mac->link.speed1000 = 0;
	mac->link.speed_mask = GMAC_CONFIG_FES | GMAC_CONFIG_PS;
	mac->mii.addr = GMAC_MDIO_ADDR;
	mac->mii.data = GMAC_MDIO_DATA;
	mac->mii.addr_shift = 21;
	mac->mii.addr_mask = GENMASK(25, 21);
	mac->mii.reg_shift = 16;
	mac->mii.reg_mask = GENMASK(20, 16);
	mac->mii.clk_csr_shift = 8;
	mac->mii.clk_csr_mask = GENMASK(11, 8);

	/* Get and dump the chip ID */
	*synopsys_id = stmmac_get_synopsys_id(hwid);

	if (*synopsys_id > DWMAC_CORE_4_00)
		mac->dma = &dwmac410_dma_ops;
	else
		mac->dma = &dwmac4_dma_ops;

	if (*synopsys_id >= DWMAC_CORE_4_00)
		mac->mac = &dwmac410_ops;
	else
		mac->mac = &dwmac4_ops;

	return mac;
}