bfin_mac: Move the Analog Devices Inc driver

Move the Analog Devices Inc driver into drivers/net/ethernet/adi/ and
make the necessary Kconfig and Makefile changes.

CC: <uclinux-dist-devel@blackfin.uclinux.org>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Acked-by: Bob Liu <bob.liu@analog.com>

1 files changed, 0 insertions, 1767 deletions

diff --git a/drivers/net/bfin_mac.c b/drivers/net/bfin_mac.c
deleted file mode 100644
index 6c019e14854..00000000000
--- a/drivers/net/bfin_mac.c
+++ /dev/null
@@ -1,1767 +0,0 @@
-/*
- * Blackfin On-Chip MAC Driver
- *
- * Copyright 2004-2010 Analog Devices Inc.
- *
- * Enter bugs at http://blackfin.uclinux.org/
- *
- * Licensed under the GPL-2 or later.
- */
-
-#define DRV_VERSION	"1.1"
-#define DRV_DESC	"Blackfin on-chip Ethernet MAC driver"
-
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/sched.h>
-#include <linux/slab.h>
-#include <linux/delay.h>
-#include <linux/timer.h>
-#include <linux/errno.h>
-#include <linux/irq.h>
-#include <linux/io.h>
-#include <linux/ioport.h>
-#include <linux/crc32.h>
-#include <linux/device.h>
-#include <linux/spinlock.h>
-#include <linux/mii.h>
-#include <linux/netdevice.h>
-#include <linux/etherdevice.h>
-#include <linux/ethtool.h>
-#include <linux/skbuff.h>
-#include <linux/platform_device.h>
-
-#include <asm/dma.h>
-#include <linux/dma-mapping.h>
-
-#include <asm/div64.h>
-#include <asm/dpmc.h>
-#include <asm/blackfin.h>
-#include <asm/cacheflush.h>
-#include <asm/portmux.h>
-#include <mach/pll.h>
-
-#include "bfin_mac.h"
-
-MODULE_AUTHOR("Bryan Wu, Luke Yang");
-MODULE_LICENSE("GPL");
-MODULE_DESCRIPTION(DRV_DESC);
-MODULE_ALIAS("platform:bfin_mac");
-
-#if defined(CONFIG_BFIN_MAC_USE_L1)
-# define bfin_mac_alloc(dma_handle, size, num)  l1_data_sram_zalloc(size*num)
-# define bfin_mac_free(dma_handle, ptr, num)    l1_data_sram_free(ptr)
-#else
-# define bfin_mac_alloc(dma_handle, size, num) \
-	dma_alloc_coherent(NULL, size*num, dma_handle, GFP_KERNEL)
-# define bfin_mac_free(dma_handle, ptr, num) \
-	dma_free_coherent(NULL, sizeof(*ptr)*num, ptr, dma_handle)
-#endif
-
-#define PKT_BUF_SZ 1580
-
-#define MAX_TIMEOUT_CNT	500
-
-/* pointers to maintain transmit list */
-static struct net_dma_desc_tx *tx_list_head;
-static struct net_dma_desc_tx *tx_list_tail;
-static struct net_dma_desc_rx *rx_list_head;
-static struct net_dma_desc_rx *rx_list_tail;
-static struct net_dma_desc_rx *current_rx_ptr;
-static struct net_dma_desc_tx *current_tx_ptr;
-static struct net_dma_desc_tx *tx_desc;
-static struct net_dma_desc_rx *rx_desc;
-
-static void desc_list_free(void)
-{
-	struct net_dma_desc_rx *r;
-	struct net_dma_desc_tx *t;
-	int i;
-#if !defined(CONFIG_BFIN_MAC_USE_L1)
-	dma_addr_t dma_handle = 0;
-#endif
-
-	if (tx_desc) {
-		t = tx_list_head;
-		for (i = 0; i < CONFIG_BFIN_TX_DESC_NUM; i++) {
-			if (t) {
-				if (t->skb) {
-					dev_kfree_skb(t->skb);
-					t->skb = NULL;
-				}
-				t = t->next;
-			}
-		}
-		bfin_mac_free(dma_handle, tx_desc, CONFIG_BFIN_TX_DESC_NUM);
-	}
-
-	if (rx_desc) {
-		r = rx_list_head;
-		for (i = 0; i < CONFIG_BFIN_RX_DESC_NUM; i++) {
-			if (r) {
-				if (r->skb) {
-					dev_kfree_skb(r->skb);
-					r->skb = NULL;
-				}
-				r = r->next;
-			}
-		}
-		bfin_mac_free(dma_handle, rx_desc, CONFIG_BFIN_RX_DESC_NUM);
-	}
-}
-
-static int desc_list_init(void)
-{
-	int i;
-	struct sk_buff *new_skb;
-#if !defined(CONFIG_BFIN_MAC_USE_L1)
-	/*
-	 * This dma_handle is useless in Blackfin dma_alloc_coherent().
-	 * The real dma handler is the return value of dma_alloc_coherent().
-	 */
-	dma_addr_t dma_handle;
-#endif
-
-	tx_desc = bfin_mac_alloc(&dma_handle,
-				sizeof(struct net_dma_desc_tx),
-				CONFIG_BFIN_TX_DESC_NUM);
-	if (tx_desc == NULL)
-		goto init_error;
-
-	rx_desc = bfin_mac_alloc(&dma_handle,
-				sizeof(struct net_dma_desc_rx),
-				CONFIG_BFIN_RX_DESC_NUM);
-	if (rx_desc == NULL)
-		goto init_error;
-
-	/* init tx_list */
-	tx_list_head = tx_list_tail = tx_desc;
-
-	for (i = 0; i < CONFIG_BFIN_TX_DESC_NUM; i++) {
-		struct net_dma_desc_tx *t = tx_desc + i;
-		struct dma_descriptor *a = &(t->desc_a);
-		struct dma_descriptor *b = &(t->desc_b);
-
-		/*
-		 * disable DMA
-		 * read from memory WNR = 0
-		 * wordsize is 32 bits
-		 * 6 half words is desc size
-		 * large desc flow
-		 */
-		a->config = WDSIZE_32 | NDSIZE_6 | DMAFLOW_LARGE;
-		a->start_addr = (unsigned long)t->packet;
-		a->x_count = 0;
-		a->next_dma_desc = b;
-
-		/*
-		 * enabled DMA
-		 * write to memory WNR = 1
-		 * wordsize is 32 bits
-		 * disable interrupt
-		 * 6 half words is desc size
-		 * large desc flow
-		 */
-		b->config = DMAEN | WNR | WDSIZE_32 | NDSIZE_6 | DMAFLOW_LARGE;
-		b->start_addr = (unsigned long)(&(t->status));
-		b->x_count = 0;
-
-		t->skb = NULL;
-		tx_list_tail->desc_b.next_dma_desc = a;
-		tx_list_tail->next = t;
-		tx_list_tail = t;
-	}
-	tx_list_tail->next = tx_list_head;	/* tx_list is a circle */
-	tx_list_tail->desc_b.next_dma_desc = &(tx_list_head->desc_a);
-	current_tx_ptr = tx_list_head;
-
-	/* init rx_list */
-	rx_list_head = rx_list_tail = rx_desc;
-
-	for (i = 0; i < CONFIG_BFIN_RX_DESC_NUM; i++) {
-		struct net_dma_desc_rx *r = rx_desc + i;
-		struct dma_descriptor *a = &(r->desc_a);
-		struct dma_descriptor *b = &(r->desc_b);
-
-		/* allocate a new skb for next time receive */
-		new_skb = dev_alloc_skb(PKT_BUF_SZ + NET_IP_ALIGN);
-		if (!new_skb) {
-			pr_notice("init: low on mem - packet dropped\n");
-			goto init_error;
-		}
-		skb_reserve(new_skb, NET_IP_ALIGN);
-		/* Invidate the data cache of skb->data range when it is write back
-		 * cache. It will prevent overwritting the new data from DMA
-		 */
-		blackfin_dcache_invalidate_range((unsigned long)new_skb->head,
-					 (unsigned long)new_skb->end);
-		r->skb = new_skb;
-
-		/*
-		 * enabled DMA
-		 * write to memory WNR = 1
-		 * wordsize is 32 bits
-		 * disable interrupt
-		 * 6 half words is desc size
-		 * large desc flow
-		 */
-		a->config = DMAEN | WNR | WDSIZE_32 | NDSIZE_6 | DMAFLOW_LARGE;
-		/* since RXDWA is enabled */
-		a->start_addr = (unsigned long)new_skb->data - 2;
-		a->x_count = 0;
-		a->next_dma_desc = b;
-
-		/*
-		 * enabled DMA
-		 * write to memory WNR = 1
-		 * wordsize is 32 bits
-		 * enable interrupt
-		 * 6 half words is desc size
-		 * large desc flow
-		 */
-		b->config = DMAEN | WNR | WDSIZE_32 | DI_EN |
-				NDSIZE_6 | DMAFLOW_LARGE;
-		b->start_addr = (unsigned long)(&(r->status));
-		b->x_count = 0;
-
-		rx_list_tail->desc_b.next_dma_desc = a;
-		rx_list_tail->next = r;
-		rx_list_tail = r;
-	}
-	rx_list_tail->next = rx_list_head;	/* rx_list is a circle */
-	rx_list_tail->desc_b.next_dma_desc = &(rx_list_head->desc_a);
-	current_rx_ptr = rx_list_head;
-
-	return 0;
-
-init_error:
-	desc_list_free();
-	pr_err("kmalloc failed\n");
-	return -ENOMEM;
-}
-
-
-/*---PHY CONTROL AND CONFIGURATION-----------------------------------------*/
-
-/*
- * MII operations
- */
-/* Wait until the previous MDC/MDIO transaction has completed */
-static int bfin_mdio_poll(void)
-{
-	int timeout_cnt = MAX_TIMEOUT_CNT;
-
-	/* poll the STABUSY bit */
-	while ((bfin_read_EMAC_STAADD()) & STABUSY) {
-		udelay(1);
-		if (timeout_cnt-- < 0) {
-			pr_err("wait MDC/MDIO transaction to complete timeout\n");
-			return -ETIMEDOUT;
-		}
-	}
-
-	return 0;
-}
-
-/* Read an off-chip register in a PHY through the MDC/MDIO port */
-static int bfin_mdiobus_read(struct mii_bus *bus, int phy_addr, int regnum)
-{
-	int ret;
-
-	ret = bfin_mdio_poll();
-	if (ret)
-		return ret;
-
-	/* read mode */
-	bfin_write_EMAC_STAADD(SET_PHYAD((u16) phy_addr) |
-				SET_REGAD((u16) regnum) |
-				STABUSY);
-
-	ret = bfin_mdio_poll();
-	if (ret)
-		return ret;
-
-	return (int) bfin_read_EMAC_STADAT();
-}
-
-/* Write an off-chip register in a PHY through the MDC/MDIO port */
-static int bfin_mdiobus_write(struct mii_bus *bus, int phy_addr, int regnum,
-			      u16 value)
-{
-	int ret;
-
-	ret = bfin_mdio_poll();
-	if (ret)
-		return ret;
-
-	bfin_write_EMAC_STADAT((u32) value);
-
-	/* write mode */
-	bfin_write_EMAC_STAADD(SET_PHYAD((u16) phy_addr) |
-				SET_REGAD((u16) regnum) |
-				STAOP |
-				STABUSY);
-
-	return bfin_mdio_poll();
-}
-
-static int bfin_mdiobus_reset(struct mii_bus *bus)
-{
-	return 0;
-}
-
-static void bfin_mac_adjust_link(struct net_device *dev)
-{
-	struct bfin_mac_local *lp = netdev_priv(dev);
-	struct phy_device *phydev = lp->phydev;
-	unsigned long flags;
-	int new_state = 0;
-
-	spin_lock_irqsave(&lp->lock, flags);
-	if (phydev->link) {
-		/* Now we make sure that we can be in full duplex mode.
-		 * If not, we operate in half-duplex mode. */
-		if (phydev->duplex != lp->old_duplex) {
-			u32 opmode = bfin_read_EMAC_OPMODE();
-			new_state = 1;
-
-			if (phydev->duplex)
-				opmode |= FDMODE;
-			else
-				opmode &= ~(FDMODE);
-
-			bfin_write_EMAC_OPMODE(opmode);
-			lp->old_duplex = phydev->duplex;
-		}
-
-		if (phydev->speed != lp->old_speed) {
-			if (phydev->interface == PHY_INTERFACE_MODE_RMII) {
-				u32 opmode = bfin_read_EMAC_OPMODE();
-				switch (phydev->speed) {
-				case 10:
-					opmode |= RMII_10;
-					break;
-				case 100:
-					opmode &= ~RMII_10;
-					break;
-				default:
-					netdev_warn(dev,
-						"Ack! Speed (%d) is not 10/100!\n",
-						phydev->speed);
-					break;
-				}
-				bfin_write_EMAC_OPMODE(opmode);
-			}
-
-			new_state = 1;
-			lp->old_speed = phydev->speed;
-		}
-
-		if (!lp->old_link) {
-			new_state = 1;
-			lp->old_link = 1;
-		}
-	} else if (lp->old_link) {
-		new_state = 1;
-		lp->old_link = 0;
-		lp->old_speed = 0;
-		lp->old_duplex = -1;
-	}
-
-	if (new_state) {
-		u32 opmode = bfin_read_EMAC_OPMODE();
-		phy_print_status(phydev);
-		pr_debug("EMAC_OPMODE = 0x%08x\n", opmode);
-	}
-
-	spin_unlock_irqrestore(&lp->lock, flags);
-}
-
-/* MDC  = 2.5 MHz */
-#define MDC_CLK 2500000
-
-static int mii_probe(struct net_device *dev, int phy_mode)
-{
-	struct bfin_mac_local *lp = netdev_priv(dev);
-	struct phy_device *phydev = NULL;
-	unsigned short sysctl;
-	int i;
-	u32 sclk, mdc_div;
-
-	/* Enable PHY output early */
-	if (!(bfin_read_VR_CTL() & CLKBUFOE))
-		bfin_write_VR_CTL(bfin_read_VR_CTL() | CLKBUFOE);
-
-	sclk = get_sclk();
-	mdc_div = ((sclk / MDC_CLK) / 2) - 1;
-
-	sysctl = bfin_read_EMAC_SYSCTL();
-	sysctl = (sysctl & ~MDCDIV) | SET_MDCDIV(mdc_div);
-	bfin_write_EMAC_SYSCTL(sysctl);
-
-	/* search for connected PHY device */
-	for (i = 0; i < PHY_MAX_ADDR; ++i) {
-		struct phy_device *const tmp_phydev = lp->mii_bus->phy_map[i];
-
-		if (!tmp_phydev)
-			continue; /* no PHY here... */
-
-		phydev = tmp_phydev;
-		break; /* found it */
-	}
-
-	/* now we are supposed to have a proper phydev, to attach to... */
-	if (!phydev) {
-		netdev_err(dev, "no phy device found\n");
-		return -ENODEV;
-	}
-
-	if (phy_mode != PHY_INTERFACE_MODE_RMII &&
-		phy_mode != PHY_INTERFACE_MODE_MII) {
-		netdev_err(dev, "invalid phy interface mode\n");
-		return -EINVAL;
-	}
-
-	phydev = phy_connect(dev, dev_name(&phydev->dev), &bfin_mac_adjust_link,
-			0, phy_mode);
-
-	if (IS_ERR(phydev)) {
-		netdev_err(dev, "could not attach PHY\n");
-		return PTR_ERR(phydev);
-	}
-
-	/* mask with MAC supported features */
-	phydev->supported &= (SUPPORTED_10baseT_Half
-			      | SUPPORTED_10baseT_Full
-			      | SUPPORTED_100baseT_Half
-			      | SUPPORTED_100baseT_Full
-			      | SUPPORTED_Autoneg
-			      | SUPPORTED_Pause | SUPPORTED_Asym_Pause
-			      | SUPPORTED_MII
-			      | SUPPORTED_TP);
-
-	phydev->advertising = phydev->supported;
-
-	lp->old_link = 0;
-	lp->old_speed = 0;
-	lp->old_duplex = -1;
-	lp->phydev = phydev;
-
-	pr_info("attached PHY driver [%s] "
-	        "(mii_bus:phy_addr=%s, irq=%d, mdc_clk=%dHz(mdc_div=%d)@sclk=%dMHz)\n",
-	        phydev->drv->name, dev_name(&phydev->dev), phydev->irq,
-	        MDC_CLK, mdc_div, sclk/1000000);
-
-	return 0;
-}
-
-/*
- * Ethtool support
- */
-
-/*
- * interrupt routine for magic packet wakeup
- */
-static irqreturn_t bfin_mac_wake_interrupt(int irq, void *dev_id)
-{
-	return IRQ_HANDLED;
-}
-
-static int
-bfin_mac_ethtool_getsettings(struct net_device *dev, struct ethtool_cmd *cmd)
-{
-	struct bfin_mac_local *lp = netdev_priv(dev);
-
-	if (lp->phydev)
-		return phy_ethtool_gset(lp->phydev, cmd);
-
-	return -EINVAL;
-}
-
-static int
-bfin_mac_ethtool_setsettings(struct net_device *dev, struct ethtool_cmd *cmd)
-{
-	struct bfin_mac_local *lp = netdev_priv(dev);
-
-	if (!capable(CAP_NET_ADMIN))
-		return -EPERM;
-
-	if (lp->phydev)
-		return phy_ethtool_sset(lp->phydev, cmd);
-
-	return -EINVAL;
-}
-
-static void bfin_mac_ethtool_getdrvinfo(struct net_device *dev,
-					struct ethtool_drvinfo *info)
-{
-	strcpy(info->driver, KBUILD_MODNAME);
-	strcpy(info->version, DRV_VERSION);
-	strcpy(info->fw_version, "N/A");
-	strcpy(info->bus_info, dev_name(&dev->dev));
-}
-
-static void bfin_mac_ethtool_getwol(struct net_device *dev,
-	struct ethtool_wolinfo *wolinfo)
-{
-	struct bfin_mac_local *lp = netdev_priv(dev);
-
-	wolinfo->supported = WAKE_MAGIC;
-	wolinfo->wolopts = lp->wol;
-}
-
-static int bfin_mac_ethtool_setwol(struct net_device *dev,
-	struct ethtool_wolinfo *wolinfo)
-{
-	struct bfin_mac_local *lp = netdev_priv(dev);
-	int rc;
-
-	if (wolinfo->wolopts & (WAKE_MAGICSECURE |
-				WAKE_UCAST |
-				WAKE_MCAST |
-				WAKE_BCAST |
-				WAKE_ARP))
-		return -EOPNOTSUPP;
-
-	lp->wol = wolinfo->wolopts;
-
-	if (lp->wol && !lp->irq_wake_requested) {
-		/* register wake irq handler */
-		rc = request_irq(IRQ_MAC_WAKEDET, bfin_mac_wake_interrupt,
-				 IRQF_DISABLED, "EMAC_WAKE", dev);
-		if (rc)
-			return rc;
-		lp->irq_wake_requested = true;
-	}
-
-	if (!lp->wol && lp->irq_wake_requested) {
-		free_irq(IRQ_MAC_WAKEDET, dev);
-		lp->irq_wake_requested = false;
-	}
-
-	/* Make sure the PHY driver doesn't suspend */
-	device_init_wakeup(&dev->dev, lp->wol);
-
-	return 0;
-}
-
-static const struct ethtool_ops bfin_mac_ethtool_ops = {
-	.get_settings = bfin_mac_ethtool_getsettings,
-	.set_settings = bfin_mac_ethtool_setsettings,
-	.get_link = ethtool_op_get_link,
-	.get_drvinfo = bfin_mac_ethtool_getdrvinfo,
-	.get_wol = bfin_mac_ethtool_getwol,
-	.set_wol = bfin_mac_ethtool_setwol,
-};
-
-/**************************************************************************/
-static void setup_system_regs(struct net_device *dev)
-{
-	struct bfin_mac_local *lp = netdev_priv(dev);
-	int i;
-	unsigned short sysctl;
-
-	/*
-	 * Odd word alignment for Receive Frame DMA word
-	 * Configure checksum support and rcve frame word alignment
-	 */
-	sysctl = bfin_read_EMAC_SYSCTL();
-	/*
-	 * check if interrupt is requested for any PHY,
-	 * enable PHY interrupt only if needed
-	 */
-	for (i = 0; i < PHY_MAX_ADDR; ++i)
-		if (lp->mii_bus->irq[i] != PHY_POLL)
-			break;
-	if (i < PHY_MAX_ADDR)
-		sysctl |= PHYIE;
-	sysctl |= RXDWA;
-#if defined(BFIN_MAC_CSUM_OFFLOAD)
-	sysctl |= RXCKS;
-#else
-	sysctl &= ~RXCKS;
-#endif
-	bfin_write_EMAC_SYSCTL(sysctl);
-
-	bfin_write_EMAC_MMC_CTL(RSTC | CROLL);
-
-	/* Set vlan regs to let 1522 bytes long packets pass through */
-	bfin_write_EMAC_VLAN1(lp->vlan1_mask);
-	bfin_write_EMAC_VLAN2(lp->vlan2_mask);
-
-	/* Initialize the TX DMA channel registers */
-	bfin_write_DMA2_X_COUNT(0);
-	bfin_write_DMA2_X_MODIFY(4);
-	bfin_write_DMA2_Y_COUNT(0);
-	bfin_write_DMA2_Y_MODIFY(0);
-
-	/* Initialize the RX DMA channel registers */
-	bfin_write_DMA1_X_COUNT(0);
-	bfin_write_DMA1_X_MODIFY(4);
-	bfin_write_DMA1_Y_COUNT(0);
-	bfin_write_DMA1_Y_MODIFY(0);
-}
-
-static void setup_mac_addr(u8 *mac_addr)
-{
-	u32 addr_low = le32_to_cpu(*(__le32 *) & mac_addr[0]);
-	u16 addr_hi = le16_to_cpu(*(__le16 *) & mac_addr[4]);
-
-	/* this depends on a little-endian machine */
-	bfin_write_EMAC_ADDRLO(addr_low);
-	bfin_write_EMAC_ADDRHI(addr_hi);
-}
-
-static int bfin_mac_set_mac_address(struct net_device *dev, void *p)
-{
-	struct sockaddr *addr = p;
-	if (netif_running(dev))
-		return -EBUSY;
-	memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
-	setup_mac_addr(dev->dev_addr);
-	return 0;
-}
-
-#ifdef CONFIG_BFIN_MAC_USE_HWSTAMP
-#define bfin_mac_hwtstamp_is_none(cfg) ((cfg) == HWTSTAMP_FILTER_NONE)
-
-static int bfin_mac_hwtstamp_ioctl(struct net_device *netdev,
-		struct ifreq *ifr, int cmd)
-{
-	struct hwtstamp_config config;
-	struct bfin_mac_local *lp = netdev_priv(netdev);
-	u16 ptpctl;
-	u32 ptpfv1, ptpfv2, ptpfv3, ptpfoff;
-
-	if (copy_from_user(&config, ifr->ifr_data, sizeof(config)))
-		return -EFAULT;
-
-	pr_debug("%s config flag:0x%x, tx_type:0x%x, rx_filter:0x%x\n",
-			__func__, config.flags, config.tx_type, config.rx_filter);
-
-	/* reserved for future extensions */
-	if (config.flags)
-		return -EINVAL;
-
-	if ((config.tx_type != HWTSTAMP_TX_OFF) &&
-			(config.tx_type != HWTSTAMP_TX_ON))
-		return -ERANGE;
-
-	ptpctl = bfin_read_EMAC_PTP_CTL();
-
-	switch (config.rx_filter) {
-	case HWTSTAMP_FILTER_NONE:
-		/*
-		 * Dont allow any timestamping
-		 */
-		ptpfv3 = 0xFFFFFFFF;
-		bfin_write_EMAC_PTP_FV3(ptpfv3);
-		break;
-	case HWTSTAMP_FILTER_PTP_V1_L4_EVENT:
-	case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
-	case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
-		/*
-		 * Clear the five comparison mask bits (bits[12:8]) in EMAC_PTP_CTL)
-		 * to enable all the field matches.
-		 */
-		ptpctl &= ~0x1F00;
-		bfin_write_EMAC_PTP_CTL(ptpctl);
-		/*
-		 * Keep the default values of the EMAC_PTP_FOFF register.
-		 */
-		ptpfoff = 0x4A24170C;
-		bfin_write_EMAC_PTP_FOFF(ptpfoff);
-		/*
-		 * Keep the default values of the EMAC_PTP_FV1 and EMAC_PTP_FV2
-		 * registers.
-		 */
-		ptpfv1 = 0x11040800;
-		bfin_write_EMAC_PTP_FV1(ptpfv1);
-		ptpfv2 = 0x0140013F;
-		bfin_write_EMAC_PTP_FV2(ptpfv2);
-		/*
-		 * The default value (0xFFFC) allows the timestamping of both
-		 * received Sync messages and Delay_Req messages.
-		 */
-		ptpfv3 = 0xFFFFFFFC;
-		bfin_write_EMAC_PTP_FV3(ptpfv3);
-
-		config.rx_filter = HWTSTAMP_FILTER_PTP_V1_L4_EVENT;
-		break;
-	case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
-	case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
-	case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
-		/* Clear all five comparison mask bits (bits[12:8]) in the
-		 * EMAC_PTP_CTL register to enable all the field matches.
-		 */
-		ptpctl &= ~0x1F00;
-		bfin_write_EMAC_PTP_CTL(ptpctl);
-		/*
-		 * Keep the default values of the EMAC_PTP_FOFF register, except set
-		 * the PTPCOF field to 0x2A.
-		 */
-		ptpfoff = 0x2A24170C;
-		bfin_write_EMAC_PTP_FOFF(ptpfoff);
-		/*
-		 * Keep the default values of the EMAC_PTP_FV1 and EMAC_PTP_FV2
-		 * registers.
-		 */
-		ptpfv1 = 0x11040800;
-		bfin_write_EMAC_PTP_FV1(ptpfv1);
-		ptpfv2 = 0x0140013F;
-		bfin_write_EMAC_PTP_FV2(ptpfv2);
-		/*
-		 * To allow the timestamping of Pdelay_Req and Pdelay_Resp, set
-		 * the value to 0xFFF0.
-		 */
-		ptpfv3 = 0xFFFFFFF0;
-		bfin_write_EMAC_PTP_FV3(ptpfv3);
-
-		config.rx_filter = HWTSTAMP_FILTER_PTP_V2_L4_EVENT;
-		break;
-	case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
-	case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
-	case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
-		/*
-		 * Clear bits 8 and 12 of the EMAC_PTP_CTL register to enable only the
-		 * EFTM and PTPCM field comparison.
-		 */
-		ptpctl &= ~0x1100;
-		bfin_write_EMAC_PTP_CTL(ptpctl);
-		/*
-		 * Keep the default values of all the fields of the EMAC_PTP_FOFF
-		 * register, except set the PTPCOF field to 0x0E.
-		 */
-		ptpfoff = 0x0E24170C;
-		bfin_write_EMAC_PTP_FOFF(ptpfoff);
-		/*
-		 * Program bits [15:0] of the EMAC_PTP_FV1 register to 0x88F7, which
-		 * corresponds to PTP messages on the MAC layer.
-		 */
-		ptpfv1 = 0x110488F7;
-		bfin_write_EMAC_PTP_FV1(ptpfv1);
-		ptpfv2 = 0x0140013F;
-		bfin_write_EMAC_PTP_FV2(ptpfv2);
-		/*
-		 * To allow the timestamping of Pdelay_Req and Pdelay_Resp
-		 * messages, set the value to 0xFFF0.
-		 */
-		ptpfv3 = 0xFFFFFFF0;
-		bfin_write_EMAC_PTP_FV3(ptpfv3);
-
-		config.rx_filter = HWTSTAMP_FILTER_PTP_V2_L2_EVENT;
-		break;
-	default:
-		return -ERANGE;
-	}
-
-	if (config.tx_type == HWTSTAMP_TX_OFF &&
-	    bfin_mac_hwtstamp_is_none(config.rx_filter)) {
-		ptpctl &= ~PTP_EN;
-		bfin_write_EMAC_PTP_CTL(ptpctl);
-
-		SSYNC();
-	} else {
-		ptpctl |= PTP_EN;
-		bfin_write_EMAC_PTP_CTL(ptpctl);
-
-		/*
-		 * clear any existing timestamp
-		 */
-		bfin_read_EMAC_PTP_RXSNAPLO();
-		bfin_read_EMAC_PTP_RXSNAPHI();
-
-		bfin_read_EMAC_PTP_TXSNAPLO();
-		bfin_read_EMAC_PTP_TXSNAPHI();
-
-		/*
-		 * Set registers so that rollover occurs soon to test this.
-		 */
-		bfin_write_EMAC_PTP_TIMELO(0x00000000);
-		bfin_write_EMAC_PTP_TIMEHI(0xFF800000);
-
-		SSYNC();
-
-		lp->compare.last_update = 0;
-		timecounter_init(&lp->clock,
-				&lp->cycles,
-				ktime_to_ns(ktime_get_real()));
-		timecompare_update(&lp->compare, 0);
-	}
-
-	lp->stamp_cfg = config;
-	return copy_to_user(ifr->ifr_data, &config, sizeof(config)) ?
-		-EFAULT : 0;
-}
-
-static void bfin_dump_hwtamp(char *s, ktime_t *hw, ktime_t *ts, struct timecompare *cmp)
-{
-	ktime_t sys = ktime_get_real();
-
-	pr_debug("%s %s hardware:%d,%d transform system:%d,%d system:%d,%d, cmp:%lld, %lld\n",
-			__func__, s, hw->tv.sec, hw->tv.nsec, ts->tv.sec, ts->tv.nsec, sys.tv.sec,
-			sys.tv.nsec, cmp->offset, cmp->skew);
-}
-
-static void bfin_tx_hwtstamp(struct net_device *netdev, struct sk_buff *skb)
-{
-	struct bfin_mac_local *lp = netdev_priv(netdev);
-
-	if (skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) {
-		int timeout_cnt = MAX_TIMEOUT_CNT;
-
-		/* When doing time stamping, keep the connection to the socket
-		 * a while longer
-		 */
-		skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
-
-		/*
-		 * The timestamping is done at the EMAC module's MII/RMII interface
-		 * when the module sees the Start of Frame of an event message packet. This
-		 * interface is the closest possible place to the physical Ethernet transmission
-		 * medium, providing the best timing accuracy.
-		 */
-		while ((!(bfin_read_EMAC_PTP_ISTAT() & TXTL)) && (--timeout_cnt))
-			udelay(1);
-		if (timeout_cnt == 0)
-			netdev_err(netdev, "timestamp the TX packet failed\n");
-		else {
-			struct skb_shared_hwtstamps shhwtstamps;
-			u64 ns;
-			u64 regval;
-
-			regval = bfin_read_EMAC_PTP_TXSNAPLO();
-			regval |= (u64)bfin_read_EMAC_PTP_TXSNAPHI() << 32;
-			memset(&shhwtstamps, 0, sizeof(shhwtstamps));
-			ns = timecounter_cyc2time(&lp->clock,
-					regval);
-			timecompare_update(&lp->compare, ns);
-			shhwtstamps.hwtstamp = ns_to_ktime(ns);
-			shhwtstamps.syststamp =
-				timecompare_transform(&lp->compare, ns);
-			skb_tstamp_tx(skb, &shhwtstamps);
-
-			bfin_dump_hwtamp("TX", &shhwtstamps.hwtstamp, &shhwtstamps.syststamp, &lp->compare);
-		}
-	}
-}
-
-static void bfin_rx_hwtstamp(struct net_device *netdev, struct sk_buff *skb)
-{
-	struct bfin_mac_local *lp = netdev_priv(netdev);
-	u32 valid;
-	u64 regval, ns;
-	struct skb_shared_hwtstamps *shhwtstamps;
-
-	if (bfin_mac_hwtstamp_is_none(lp->stamp_cfg.rx_filter))
-		return;
-
-	valid = bfin_read_EMAC_PTP_ISTAT() & RXEL;
-	if (!valid)
-		return;
-
-	shhwtstamps = skb_hwtstamps(skb);
-
-	regval = bfin_read_EMAC_PTP_RXSNAPLO();
-	regval |= (u64)bfin_read_EMAC_PTP_RXSNAPHI() << 32;
-	ns = timecounter_cyc2time(&lp->clock, regval);
-	timecompare_update(&lp->compare, ns);
-	memset(shhwtstamps, 0, sizeof(*shhwtstamps));
-	shhwtstamps->hwtstamp = ns_to_ktime(ns);
-	shhwtstamps->syststamp = timecompare_transform(&lp->compare, ns);
-
-	bfin_dump_hwtamp("RX", &shhwtstamps->hwtstamp, &shhwtstamps->syststamp, &lp->compare);
-}
-
-/*
- * bfin_read_clock - read raw cycle counter (to be used by time counter)
- */
-static cycle_t bfin_read_clock(const struct cyclecounter *tc)
-{
-	u64 stamp;
-
-	stamp =  bfin_read_EMAC_PTP_TIMELO();
-	stamp |= (u64)bfin_read_EMAC_PTP_TIMEHI() << 32ULL;
-
-	return stamp;
-}
-
-#define PTP_CLK 25000000
-
-static void bfin_mac_hwtstamp_init(struct net_device *netdev)
-{
-	struct bfin_mac_local *lp = netdev_priv(netdev);
-	u64 append;
-
-	/* Initialize hardware timer */
-	append = PTP_CLK * (1ULL << 32);
-	do_div(append, get_sclk());
-	bfin_write_EMAC_PTP_ADDEND((u32)append);
-
-	memset(&lp->cycles, 0, sizeof(lp->cycles));
-	lp->cycles.read = bfin_read_clock;
-	lp->cycles.mask = CLOCKSOURCE_MASK(64);
-	lp->cycles.mult = 1000000000 / PTP_CLK;
-	lp->cycles.shift = 0;
-
-	/* Synchronize our NIC clock against system wall clock */
-	memset(&lp->compare, 0, sizeof(lp->compare));
-	lp->compare.source = &lp->clock;
-	lp->compare.target = ktime_get_real;
-	lp->compare.num_samples = 10;
-
-	/* Initialize hwstamp config */
-	lp->stamp_cfg.rx_filter = HWTSTAMP_FILTER_NONE;
-	lp->stamp_cfg.tx_type = HWTSTAMP_TX_OFF;
-}
-
-#else
-# define bfin_mac_hwtstamp_is_none(cfg) 0
-# define bfin_mac_hwtstamp_init(dev)
-# define bfin_mac_hwtstamp_ioctl(dev, ifr, cmd) (-EOPNOTSUPP)
-# define bfin_rx_hwtstamp(dev, skb)
-# define bfin_tx_hwtstamp(dev, skb)
-#endif
-
-static inline void _tx_reclaim_skb(void)
-{
-	do {
-		tx_list_head->desc_a.config &= ~DMAEN;
-		tx_list_head->status.status_word = 0;
-		if (tx_list_head->skb) {
-			dev_kfree_skb(tx_list_head->skb);
-			tx_list_head->skb = NULL;
-		}
-		tx_list_head = tx_list_head->next;
-
-	} while (tx_list_head->status.status_word != 0);
-}
-
-static void tx_reclaim_skb(struct bfin_mac_local *lp)
-{
-	int timeout_cnt = MAX_TIMEOUT_CNT;
-
-	if (tx_list_head->status.status_word != 0)
-		_tx_reclaim_skb();
-
-	if (current_tx_ptr->next == tx_list_head) {
-		while (tx_list_head->status.status_word == 0) {
-			/* slow down polling to avoid too many queue stop. */
-			udelay(10);
-			/* reclaim skb if DMA is not running. */
-			if (!(bfin_read_DMA2_IRQ_STATUS() & DMA_RUN))
-				break;
-			if (timeout_cnt-- < 0)
-				break;
-		}
-
-		if (timeout_cnt >= 0)
-			_tx_reclaim_skb();
-		else
-			netif_stop_queue(lp->ndev);
-	}
-
-	if (current_tx_ptr->next != tx_list_head &&
-		netif_queue_stopped(lp->ndev))
-		netif_wake_queue(lp->ndev);
-
-	if (tx_list_head != current_tx_ptr) {
-		/* shorten the timer interval if tx queue is stopped */
-		if (netif_queue_stopped(lp->ndev))
-			lp->tx_reclaim_timer.expires =
-				jiffies + (TX_RECLAIM_JIFFIES >> 4);
-		else
-			lp->tx_reclaim_timer.expires =
-				jiffies + TX_RECLAIM_JIFFIES;
-
-		mod_timer(&lp->tx_reclaim_timer,
-			lp->tx_reclaim_timer.expires);
-	}
-
-	return;
-}
-
-static void tx_reclaim_skb_timeout(unsigned long lp)
-{
-	tx_reclaim_skb((struct bfin_mac_local *)lp);
-}
-
-static int bfin_mac_hard_start_xmit(struct sk_buff *skb,
-				struct net_device *dev)
-{
-	struct bfin_mac_local *lp = netdev_priv(dev);
-	u16 *data;
-	u32 data_align = (unsigned long)(skb->data) & 0x3;
-
-	current_tx_ptr->skb = skb;
-
-	if (data_align == 0x2) {
-		/* move skb->data to current_tx_ptr payload */
-		data = (u16 *)(skb->data) - 1;
-		*data = (u16)(skb->len);
-		/*
-		 * When transmitting an Ethernet packet, the PTP_TSYNC module requires
-		 * a DMA_Length_Word field associated with the packet. The lower 12 bits
-		 * of this field are the length of the packet payload in bytes and the higher
-		 * 4 bits are the timestamping enable field.
-		 */
-		if (skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP)
-			*data |= 0x1000;
-
-		current_tx_ptr->desc_a.start_addr = (u32)data;
-		/* this is important! */
-		blackfin_dcache_flush_range((u32)data,
-				(u32)((u8 *)data + skb->len + 4));
-	} else {
-		*((u16 *)(current_tx_ptr->packet)) = (u16)(skb->len);
-		/* enable timestamping for the sent packet */
-		if (skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP)
-			*((u16 *)(current_tx_ptr->packet)) |= 0x1000;
-		memcpy((u8 *)(current_tx_ptr->packet + 2), skb->data,
-			skb->len);
-		current_tx_ptr->desc_a.start_addr =
-			(u32)current_tx_ptr->packet;
-		blackfin_dcache_flush_range(
-			(u32)current_tx_ptr->packet,
-			(u32)(current_tx_ptr->packet + skb->len + 2));
-	}
-
-	/* make sure the internal data buffers in the core are drained
-	 * so that the DMA descriptors are completely written when the
-	 * DMA engine goes to fetch them below
-	 */
-	SSYNC();
-
-	/* always clear status buffer before start tx dma */
-	current_tx_ptr->status.status_word = 0;
-
-	/* enable this packet's dma */
-	current_tx_ptr->desc_a.config |= DMAEN;
-
-	/* tx dma is running, just return */
-	if (bfin_read_DMA2_IRQ_STATUS() & DMA_RUN)
-		goto out;
-
-	/* tx dma is not running */
-	bfin_write_DMA2_NEXT_DESC_PTR(&(current_tx_ptr->desc_a));
-	/* dma enabled, read from memory, size is 6 */
-	bfin_write_DMA2_CONFIG(current_tx_ptr->desc_a.config);
-	/* Turn on the EMAC tx */
-	bfin_write_EMAC_OPMODE(bfin_read_EMAC_OPMODE() | TE);
-
-out:
-	bfin_tx_hwtstamp(dev, skb);
-
-	current_tx_ptr = current_tx_ptr->next;
-	dev->stats.tx_packets++;
-	dev->stats.tx_bytes += (skb->len);
-
-	tx_reclaim_skb(lp);
-
-	return NETDEV_TX_OK;
-}
-
-#define IP_HEADER_OFF  0
-#define RX_ERROR_MASK (RX_LONG | RX_ALIGN | RX_CRC | RX_LEN | \
-	RX_FRAG | RX_ADDR | RX_DMAO | RX_PHY | RX_LATE | RX_RANGE)
-
-static void bfin_mac_rx(struct net_device *dev)
-{
-	struct sk_buff *skb, *new_skb;
-	unsigned short len;
-	struct bfin_mac_local *lp __maybe_unused = netdev_priv(dev);
-#if defined(BFIN_MAC_CSUM_OFFLOAD)
-	unsigned int i;
-	unsigned char fcs[ETH_FCS_LEN + 1];
-#endif
-
-	/* check if frame status word reports an error condition
-	 * we which case we simply drop the packet
-	 */
-	if (current_rx_ptr->status.status_word & RX_ERROR_MASK) {
-		netdev_notice(dev, "rx: receive error - packet dropped\n");
-		dev->stats.rx_dropped++;
-		goto out;
-	}
-
-	/* allocate a new skb for next time receive */
-	skb = current_rx_ptr->skb;
-
-	new_skb = dev_alloc_skb(PKT_BUF_SZ + NET_IP_ALIGN);
-	if (!new_skb) {
-		netdev_notice(dev, "rx: low on mem - packet dropped\n");
-		dev->stats.rx_dropped++;
-		goto out;
-	}
-	/* reserve 2 bytes for RXDWA padding */
-	skb_reserve(new_skb, NET_IP_ALIGN);
-	/* Invidate the data cache of skb->data range when it is write back
-	 * cache. It will prevent overwritting the new data from DMA
-	 */
-	blackfin_dcache_invalidate_range((unsigned long)new_skb->head,
-					 (unsigned long)new_skb->end);
-
-	current_rx_ptr->skb = new_skb;
-	current_rx_ptr->desc_a.start_addr = (unsigned long)new_skb->data - 2;
-
-	len = (unsigned short)((current_rx_ptr->status.status_word) & RX_FRLEN);
-	/* Deduce Ethernet FCS length from Ethernet payload length */
-	len -= ETH_FCS_LEN;
-	skb_put(skb, len);
-
-	skb->protocol = eth_type_trans(skb, dev);
-
-	bfin_rx_hwtstamp(dev, skb);
-
-#if defined(BFIN_MAC_CSUM_OFFLOAD)
-	/* Checksum offloading only works for IPv4 packets with the standard IP header
-	 * length of 20 bytes, because the blackfin MAC checksum calculation is
-	 * based on that assumption. We must NOT use the calculated checksum if our
-	 * IP version or header break that assumption.
-	 */
-	if (skb->data[IP_HEADER_OFF] == 0x45) {
-		skb->csum = current_rx_ptr->status.ip_payload_csum;
-		/*
-		 * Deduce Ethernet FCS from hardware generated IP payload checksum.
-		 * IP checksum is based on 16-bit one's complement algorithm.
-		 * To deduce a value from checksum is equal to add its inversion.
-		 * If the IP payload len is odd, the inversed FCS should also
-		 * begin from odd address and leave first byte zero.
-		 */
-		if (skb->len % 2) {
-			fcs[0] = 0;
-			for (i = 0; i < ETH_FCS_LEN; i++)
-				fcs[i + 1] = ~skb->data[skb->len + i];
-			skb->csum = csum_partial(fcs, ETH_FCS_LEN + 1, skb->csum);
-		} else {
-			for (i = 0; i < ETH_FCS_LEN; i++)
-				fcs[i] = ~skb->data[skb->len + i];
-			skb->csum = csum_partial(fcs, ETH_FCS_LEN, skb->csum);
-		}
-		skb->ip_summed = CHECKSUM_COMPLETE;
-	}
-#endif
-
-	netif_rx(skb);
-	dev->stats.rx_packets++;
-	dev->stats.rx_bytes += len;
-out:
-	current_rx_ptr->status.status_word = 0x00000000;
-	current_rx_ptr = current_rx_ptr->next;
-}
-
-/* interrupt routine to handle rx and error signal */
-static irqreturn_t bfin_mac_interrupt(int irq, void *dev_id)
-{
-	struct net_device *dev = dev_id;
-	int number = 0;
-
-get_one_packet:
-	if (current_rx_ptr->status.status_word == 0) {
-		/* no more new packet received */
-		if (number == 0) {
-			if (current_rx_ptr->next->status.status_word != 0) {