drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c - nest-learning-thermostat/6.0/linux-imx-4.9.88 - Git at Google

 /*
  * 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;

 		if (hw->ps == SPEED_1000) {
 			value &= ~GMAC_CONFIG_PS;
 		} else {
 			value |= GMAC_CONFIG_PS;

 			if (hw->ps == SPEED_10)
 				value &= ~GMAC_CONFIG_FES;
 			else
 				value |= GMAC_CONFIG_FES;
 		}
 	}

 	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_dump_regs(struct mac_device_info *hw)
 {
 	void __iomem *ioaddr = hw->pcsr;
 	int i;

 	pr_debug("\tDWMAC4 regs (base addr = 0x%p)\n", ioaddr);

 	for (i = 0; i < GMAC_REG_NUM; i++) {
 		int offset = i * 4;

 		pr_debug("\tReg No. %d (offset 0x%x): 0x%08x\n", i,
 			 offset, readl(ioaddr + offset));
 	}
 }

 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_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)
 {
 	void __iomem *ioaddr = hw->pcsr;
 	u32 channel = STMMAC_CHAN0;	/* FIXME */
 	unsigned int flow = 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");
 		flow |= GMAC_TX_FLOW_CTRL_TFE;
 		writel(flow, ioaddr + GMAC_QX_TX_FLOW_CTRL(channel));

 		if (duplex) {
 			pr_debug("\tduplex mode: PAUSE %d\n", pause_time);
 			flow |= (pause_time << GMAC_TX_FLOW_CTRL_PT_SHIFT);
 			writel(flow, ioaddr + GMAC_QX_TX_FLOW_CTRL(channel));
 		}
 	}
 }

 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_status(struct mac_device_info *hw,
 			     struct stmmac_extra_stats *x)
 {
 	void __iomem *ioaddr = hw->pcsr;
 	u32 mtl_int_qx_status;
 	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++;
 	}

 	mtl_int_qx_status = readl(ioaddr + MTL_INT_STATUS);
 	/* Check MTL Interrupt: Currently only one queue is used: Q0. */
 	if (mtl_int_qx_status & MTL_INT_Q0) {
 		/* read Queue 0 Interrupt status */
 		u32 status = readl(ioaddr + MTL_CHAN_INT_CTRL(STMMAC_CHAN0));

 		if (status & MTL_RX_OVERFLOW_INT) {
 			/*  clear Interrupt */
 			writel(status | MTL_RX_OVERFLOW_INT,
 			       ioaddr + MTL_CHAN_INT_CTRL(STMMAC_CHAN0));
 			ret = CORE_IRQ_MTL_RX_OVERFLOW;
 		}
 	}

 	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 value;

 	/*  Currently only channel 0 is supported */
 	value = readl(ioaddr + MTL_CHAN_TX_DEBUG(STMMAC_CHAN0));

 	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++;

 	value = readl(ioaddr + MTL_CHAN_RX_DEBUG(STMMAC_CHAN0));

 	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,
 	.rx_ipc = dwmac4_rx_ipc_enable,
 	.dump_regs = dwmac4_dump_regs,
 	.host_irq_status = dwmac4_irq_status,
 	.flow_ctrl = dwmac4_flow_ctrl,
 	.pmt = dwmac4_pmt,
 	.set_umac_addr = dwmac4_set_umac_addr,
 	.get_umac_addr = dwmac4_get_umac_addr,
 	.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->mac = &dwmac4_ops;

 	mac->link.port = GMAC_CONFIG_PS;
 	mac->link.duplex = GMAC_CONFIG_DM;
 	mac->link.speed = GMAC_CONFIG_FES;
 	mac->mii.addr = GMAC_MDIO_ADDR;
 	mac->mii.data = GMAC_MDIO_DATA;

 	/* 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;

 	return mac;
 }
	/*
	* 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;

	if (hw->ps == SPEED_1000) {
	value &= ~GMAC_CONFIG_PS;
	} else {
	value \|= GMAC_CONFIG_PS;

	if (hw->ps == SPEED_10)
	value &= ~GMAC_CONFIG_FES;
	else
	value \|= GMAC_CONFIG_FES;
	}
	}

	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_dump_regs(struct mac_device_info *hw)
	{
	void __iomem *ioaddr = hw->pcsr;
	int i;

	pr_debug("\tDWMAC4 regs (base addr = 0x%p)\n", ioaddr);

	for (i = 0; i < GMAC_REG_NUM; i++) {
	int offset = i * 4;

	pr_debug("\tReg No. %d (offset 0x%x): 0x%08x\n", i,
	offset, readl(ioaddr + offset));
	}
	}

	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_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)
	{
	void __iomem *ioaddr = hw->pcsr;
	u32 channel = STMMAC_CHAN0; /* FIXME */
	unsigned int flow = 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");
	flow \|= GMAC_TX_FLOW_CTRL_TFE;
	writel(flow, ioaddr + GMAC_QX_TX_FLOW_CTRL(channel));

	if (duplex) {
	pr_debug("\tduplex mode: PAUSE %d\n", pause_time);
	flow \|= (pause_time << GMAC_TX_FLOW_CTRL_PT_SHIFT);
	writel(flow, ioaddr + GMAC_QX_TX_FLOW_CTRL(channel));
	}
	}
	}

	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_status(struct mac_device_info *hw,
	struct stmmac_extra_stats *x)
	{
	void __iomem *ioaddr = hw->pcsr;
	u32 mtl_int_qx_status;
	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++;
	}

	mtl_int_qx_status = readl(ioaddr + MTL_INT_STATUS);
	/* Check MTL Interrupt: Currently only one queue is used: Q0. */
	if (mtl_int_qx_status & MTL_INT_Q0) {
	/* read Queue 0 Interrupt status */
	u32 status = readl(ioaddr + MTL_CHAN_INT_CTRL(STMMAC_CHAN0));

	if (status & MTL_RX_OVERFLOW_INT) {
	/* clear Interrupt */
	writel(status \| MTL_RX_OVERFLOW_INT,
	ioaddr + MTL_CHAN_INT_CTRL(STMMAC_CHAN0));
	ret = CORE_IRQ_MTL_RX_OVERFLOW;
	}
	}

	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 value;

	/* Currently only channel 0 is supported */
	value = readl(ioaddr + MTL_CHAN_TX_DEBUG(STMMAC_CHAN0));

	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++;

	value = readl(ioaddr + MTL_CHAN_RX_DEBUG(STMMAC_CHAN0));

	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,
	.rx_ipc = dwmac4_rx_ipc_enable,
	.dump_regs = dwmac4_dump_regs,
	.host_irq_status = dwmac4_irq_status,
	.flow_ctrl = dwmac4_flow_ctrl,
	.pmt = dwmac4_pmt,
	.set_umac_addr = dwmac4_set_umac_addr,
	.get_umac_addr = dwmac4_get_umac_addr,
	.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->mac = &dwmac4_ops;

	mac->link.port = GMAC_CONFIG_PS;
	mac->link.duplex = GMAC_CONFIG_DM;
	mac->link.speed = GMAC_CONFIG_FES;
	mac->mii.addr = GMAC_MDIO_ADDR;
	mac->mii.data = GMAC_MDIO_DATA;

	/* 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;

	return mac;
	}