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From:   Arnd Bergmann <arnd@kernel.org>
To:     "David S. Miller" <davem@davemloft.net>,
        Jakub Kicinski <kuba@kernel.org>
Cc:     Arnd Bergmann <arnd@arndb.de>,
        Marc Gonzalez <marc.w.gonzalez@free.fr>,
        Mans Rullgard <mans@mansr.com>, linux-kernel@vger.kernel.org,
        netdev@vger.kernel.org
Subject: [PATCH net-next] net: remove aurora nb8800 driver
Date:   Wed, 20 Jan 2021 16:06:31 +0100
Message-Id: <20210120150703.1629527-1-arnd@kernel.org>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Precedence: bulk

From: Arnd Bergmann <arnd@arndb.de>

The tango4 platform is getting removed, and this driver has no
other known users, so it can be removed.

Cc: Marc Gonzalez <marc.w.gonzalez@free.fr>
Cc: Mans Rullgard <mans@mansr.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 drivers/net/ethernet/Kconfig         |    1 -
 drivers/net/ethernet/Makefile        |    1 -
 drivers/net/ethernet/aurora/Kconfig  |   23 -
 drivers/net/ethernet/aurora/Makefile |    2 -
 drivers/net/ethernet/aurora/nb8800.c | 1520 --------------------------
 drivers/net/ethernet/aurora/nb8800.h |  316 ------
 6 files changed, 1863 deletions(-)
 delete mode 100644 drivers/net/ethernet/aurora/Kconfig
 delete mode 100644 drivers/net/ethernet/aurora/Makefile
 delete mode 100644 drivers/net/ethernet/aurora/nb8800.c
 delete mode 100644 drivers/net/ethernet/aurora/nb8800.h

diff --git a/drivers/net/ethernet/Kconfig b/drivers/net/ethernet/Kconfig
index de50e8b9e656..ad04660b97b8 100644
--- a/drivers/net/ethernet/Kconfig
+++ b/drivers/net/ethernet/Kconfig
@@ -33,7 +33,6 @@ source "drivers/net/ethernet/apple/Kconfig"
 source "drivers/net/ethernet/aquantia/Kconfig"
 source "drivers/net/ethernet/arc/Kconfig"
 source "drivers/net/ethernet/atheros/Kconfig"
-source "drivers/net/ethernet/aurora/Kconfig"
 source "drivers/net/ethernet/broadcom/Kconfig"
 source "drivers/net/ethernet/brocade/Kconfig"
 source "drivers/net/ethernet/cadence/Kconfig"
diff --git a/drivers/net/ethernet/Makefile b/drivers/net/ethernet/Makefile
index f8f38dcb5f8a..1e7dc8a7762d 100644
--- a/drivers/net/ethernet/Makefile
+++ b/drivers/net/ethernet/Makefile
@@ -19,7 +19,6 @@ obj-$(CONFIG_NET_VENDOR_APPLE) += apple/
 obj-$(CONFIG_NET_VENDOR_AQUANTIA) += aquantia/
 obj-$(CONFIG_NET_VENDOR_ARC) += arc/
 obj-$(CONFIG_NET_VENDOR_ATHEROS) += atheros/
-obj-$(CONFIG_NET_VENDOR_AURORA) += aurora/
 obj-$(CONFIG_NET_VENDOR_CADENCE) += cadence/
 obj-$(CONFIG_NET_VENDOR_BROADCOM) += broadcom/
 obj-$(CONFIG_NET_VENDOR_BROCADE) += brocade/
diff --git a/drivers/net/ethernet/aurora/Kconfig b/drivers/net/ethernet/aurora/Kconfig
deleted file mode 100644
index 9ee30ea90bfa..000000000000
--- a/drivers/net/ethernet/aurora/Kconfig
+++ /dev/null
@@ -1,23 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0-only
-config NET_VENDOR_AURORA
-	bool "Aurora VLSI devices"
-	default y
-	help
-	  If you have a network (Ethernet) device belonging to this class,
-	  say Y.
-
-	  Note that the answer to this question doesn't directly affect the
-	  kernel: saying N will just cause the configurator to skip all
-	  questions about Aurora devices. If you say Y, you will be asked
-	  for your specific device in the following questions.
-
-if NET_VENDOR_AURORA
-
-config AURORA_NB8800
-	tristate "Aurora AU-NB8800 support"
-	depends on HAS_DMA
-	select PHYLIB
-	help
-	 Support for the AU-NB8800 gigabit Ethernet controller.
-
-endif
diff --git a/drivers/net/ethernet/aurora/Makefile b/drivers/net/ethernet/aurora/Makefile
deleted file mode 100644
index f3d599867619..000000000000
--- a/drivers/net/ethernet/aurora/Makefile
+++ /dev/null
@@ -1,2 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0-only
-obj-$(CONFIG_AURORA_NB8800) += nb8800.o
diff --git a/drivers/net/ethernet/aurora/nb8800.c b/drivers/net/ethernet/aurora/nb8800.c
deleted file mode 100644
index 5b20185cbd62..000000000000
--- a/drivers/net/ethernet/aurora/nb8800.c
+++ /dev/null
@@ -1,1520 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * Copyright (C) 2015 Mans Rullgard <mans@mansr.com>
- *
- * Mostly rewritten, based on driver from Sigma Designs.  Original
- * copyright notice below.
- *
- * Driver for tangox SMP864x/SMP865x/SMP867x/SMP868x builtin Ethernet Mac.
- *
- * Copyright (C) 2005 Maxime Bizon <mbizon@freebox.fr>
- */
-
-#include <linux/module.h>
-#include <linux/etherdevice.h>
-#include <linux/delay.h>
-#include <linux/ethtool.h>
-#include <linux/interrupt.h>
-#include <linux/platform_device.h>
-#include <linux/of_device.h>
-#include <linux/of_mdio.h>
-#include <linux/of_net.h>
-#include <linux/dma-mapping.h>
-#include <linux/phy.h>
-#include <linux/cache.h>
-#include <linux/jiffies.h>
-#include <linux/io.h>
-#include <linux/iopoll.h>
-#include <asm/barrier.h>
-
-#include "nb8800.h"
-
-static void nb8800_tx_done(struct net_device *dev);
-static int nb8800_dma_stop(struct net_device *dev);
-
-static inline u8 nb8800_readb(struct nb8800_priv *priv, int reg)
-{
-	return readb_relaxed(priv->base + reg);
-}
-
-static inline u32 nb8800_readl(struct nb8800_priv *priv, int reg)
-{
-	return readl_relaxed(priv->base + reg);
-}
-
-static inline void nb8800_writeb(struct nb8800_priv *priv, int reg, u8 val)
-{
-	writeb_relaxed(val, priv->base + reg);
-}
-
-static inline void nb8800_writew(struct nb8800_priv *priv, int reg, u16 val)
-{
-	writew_relaxed(val, priv->base + reg);
-}
-
-static inline void nb8800_writel(struct nb8800_priv *priv, int reg, u32 val)
-{
-	writel_relaxed(val, priv->base + reg);
-}
-
-static inline void nb8800_maskb(struct nb8800_priv *priv, int reg,
-				u32 mask, u32 val)
-{
-	u32 old = nb8800_readb(priv, reg);
-	u32 new = (old & ~mask) | (val & mask);
-
-	if (new != old)
-		nb8800_writeb(priv, reg, new);
-}
-
-static inline void nb8800_maskl(struct nb8800_priv *priv, int reg,
-				u32 mask, u32 val)
-{
-	u32 old = nb8800_readl(priv, reg);
-	u32 new = (old & ~mask) | (val & mask);
-
-	if (new != old)
-		nb8800_writel(priv, reg, new);
-}
-
-static inline void nb8800_modb(struct nb8800_priv *priv, int reg, u8 bits,
-			       bool set)
-{
-	nb8800_maskb(priv, reg, bits, set ? bits : 0);
-}
-
-static inline void nb8800_setb(struct nb8800_priv *priv, int reg, u8 bits)
-{
-	nb8800_maskb(priv, reg, bits, bits);
-}
-
-static inline void nb8800_clearb(struct nb8800_priv *priv, int reg, u8 bits)
-{
-	nb8800_maskb(priv, reg, bits, 0);
-}
-
-static inline void nb8800_modl(struct nb8800_priv *priv, int reg, u32 bits,
-			       bool set)
-{
-	nb8800_maskl(priv, reg, bits, set ? bits : 0);
-}
-
-static inline void nb8800_setl(struct nb8800_priv *priv, int reg, u32 bits)
-{
-	nb8800_maskl(priv, reg, bits, bits);
-}
-
-static inline void nb8800_clearl(struct nb8800_priv *priv, int reg, u32 bits)
-{
-	nb8800_maskl(priv, reg, bits, 0);
-}
-
-static int nb8800_mdio_wait(struct mii_bus *bus)
-{
-	struct nb8800_priv *priv = bus->priv;
-	u32 val;
-
-	return readl_poll_timeout_atomic(priv->base + NB8800_MDIO_CMD,
-					 val, !(val & MDIO_CMD_GO), 1, 1000);
-}
-
-static int nb8800_mdio_cmd(struct mii_bus *bus, u32 cmd)
-{
-	struct nb8800_priv *priv = bus->priv;
-	int err;
-
-	err = nb8800_mdio_wait(bus);
-	if (err)
-		return err;
-
-	nb8800_writel(priv, NB8800_MDIO_CMD, cmd);
-	udelay(10);
-	nb8800_writel(priv, NB8800_MDIO_CMD, cmd | MDIO_CMD_GO);
-
-	return nb8800_mdio_wait(bus);
-}
-
-static int nb8800_mdio_read(struct mii_bus *bus, int phy_id, int reg)
-{
-	struct nb8800_priv *priv = bus->priv;
-	u32 val;
-	int err;
-
-	err = nb8800_mdio_cmd(bus, MDIO_CMD_ADDR(phy_id) | MDIO_CMD_REG(reg));
-	if (err)
-		return err;
-
-	val = nb8800_readl(priv, NB8800_MDIO_STS);
-	if (val & MDIO_STS_ERR)
-		return 0xffff;
-
-	return val & 0xffff;
-}
-
-static int nb8800_mdio_write(struct mii_bus *bus, int phy_id, int reg, u16 val)
-{
-	u32 cmd = MDIO_CMD_ADDR(phy_id) | MDIO_CMD_REG(reg) |
-		MDIO_CMD_DATA(val) | MDIO_CMD_WR;
-
-	return nb8800_mdio_cmd(bus, cmd);
-}
-
-static void nb8800_mac_tx(struct net_device *dev, bool enable)
-{
-	struct nb8800_priv *priv = netdev_priv(dev);
-
-	while (nb8800_readl(priv, NB8800_TXC_CR) & TCR_EN)
-		cpu_relax();
-
-	nb8800_modb(priv, NB8800_TX_CTL1, TX_EN, enable);
-}
-
-static void nb8800_mac_rx(struct net_device *dev, bool enable)
-{
-	nb8800_modb(netdev_priv(dev), NB8800_RX_CTL, RX_EN, enable);
-}
-
-static void nb8800_mac_af(struct net_device *dev, bool enable)
-{
-	nb8800_modb(netdev_priv(dev), NB8800_RX_CTL, RX_AF_EN, enable);
-}
-
-static void nb8800_start_rx(struct net_device *dev)
-{
-	nb8800_setl(netdev_priv(dev), NB8800_RXC_CR, RCR_EN);
-}
-
-static int nb8800_alloc_rx(struct net_device *dev, unsigned int i, bool napi)
-{
-	struct nb8800_priv *priv = netdev_priv(dev);
-	struct nb8800_rx_desc *rxd = &priv->rx_descs[i];
-	struct nb8800_rx_buf *rxb = &priv->rx_bufs[i];
-	int size = L1_CACHE_ALIGN(RX_BUF_SIZE);
-	dma_addr_t dma_addr;
-	struct page *page;
-	unsigned long offset;
-	void *data;
-
-	data = napi ? napi_alloc_frag(size) : netdev_alloc_frag(size);
-	if (!data)
-		return -ENOMEM;
-
-	page = virt_to_head_page(data);
-	offset = data - page_address(page);
-
-	dma_addr = dma_map_page(&dev->dev, page, offset, RX_BUF_SIZE,
-				DMA_FROM_DEVICE);
-
-	if (dma_mapping_error(&dev->dev, dma_addr)) {
-		skb_free_frag(data);
-		return -ENOMEM;
-	}
-
-	rxb->page = page;
-	rxb->offset = offset;
-	rxd->desc.s_addr = dma_addr;
-
-	return 0;
-}
-
-static void nb8800_receive(struct net_device *dev, unsigned int i,
-			   unsigned int len)
-{
-	struct nb8800_priv *priv = netdev_priv(dev);
-	struct nb8800_rx_desc *rxd = &priv->rx_descs[i];
-	struct page *page = priv->rx_bufs[i].page;
-	int offset = priv->rx_bufs[i].offset;
-	void *data = page_address(page) + offset;
-	dma_addr_t dma = rxd->desc.s_addr;
-	struct sk_buff *skb;
-	unsigned int size;
-	int err;
-
-	size = len <= RX_COPYBREAK ? len : RX_COPYHDR;
-
-	skb = napi_alloc_skb(&priv->napi, size);
-	if (!skb) {
-		netdev_err(dev, "rx skb allocation failed\n");
-		dev->stats.rx_dropped++;
-		return;
-	}
-
-	if (len <= RX_COPYBREAK) {
-		dma_sync_single_for_cpu(&dev->dev, dma, len, DMA_FROM_DEVICE);
-		skb_put_data(skb, data, len);
-		dma_sync_single_for_device(&dev->dev, dma, len,
-					   DMA_FROM_DEVICE);
-	} else {
-		err = nb8800_alloc_rx(dev, i, true);
-		if (err) {
-			netdev_err(dev, "rx buffer allocation failed\n");
-			dev->stats.rx_dropped++;
-			dev_kfree_skb(skb);
-			return;
-		}
-
-		dma_unmap_page(&dev->dev, dma, RX_BUF_SIZE, DMA_FROM_DEVICE);
-		skb_put_data(skb, data, RX_COPYHDR);
-		skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, page,
-				offset + RX_COPYHDR, len - RX_COPYHDR,
-				RX_BUF_SIZE);
-	}
-
-	skb->protocol = eth_type_trans(skb, dev);
-	napi_gro_receive(&priv->napi, skb);
-}
-
-static void nb8800_rx_error(struct net_device *dev, u32 report)
-{
-	if (report & RX_LENGTH_ERR)
-		dev->stats.rx_length_errors++;
-
-	if (report & RX_FCS_ERR)
-		dev->stats.rx_crc_errors++;
-
-	if (report & RX_FIFO_OVERRUN)
-		dev->stats.rx_fifo_errors++;
-
-	if (report & RX_ALIGNMENT_ERROR)
-		dev->stats.rx_frame_errors++;
-
-	dev->stats.rx_errors++;
-}
-
-static int nb8800_poll(struct napi_struct *napi, int budget)
-{
-	struct net_device *dev = napi->dev;
-	struct nb8800_priv *priv = netdev_priv(dev);
-	struct nb8800_rx_desc *rxd;
-	unsigned int last = priv->rx_eoc;
-	unsigned int next;
-	int work = 0;
-
-	nb8800_tx_done(dev);
-
-again:
-	do {
-		unsigned int len;
-
-		next = (last + 1) % RX_DESC_COUNT;
-
-		rxd = &priv->rx_descs[next];
-
-		if (!rxd->report)
-			break;
-
-		len = RX_BYTES_TRANSFERRED(rxd->report);
-
-		if (IS_RX_ERROR(rxd->report))
-			nb8800_rx_error(dev, rxd->report);
-		else
-			nb8800_receive(dev, next, len);
-
-		dev->stats.rx_packets++;
-		dev->stats.rx_bytes += len;
-
-		if (rxd->report & RX_MULTICAST_PKT)
-			dev->stats.multicast++;
-
-		rxd->report = 0;
-		last = next;
-		work++;
-	} while (work < budget);
-
-	if (work) {
-		priv->rx_descs[last].desc.config |= DESC_EOC;
-		wmb();	/* ensure new EOC is written before clearing old */
-		priv->rx_descs[priv->rx_eoc].desc.config &= ~DESC_EOC;
-		priv->rx_eoc = last;
-		nb8800_start_rx(dev);
-	}
-
-	if (work < budget) {
-		nb8800_writel(priv, NB8800_RX_ITR, priv->rx_itr_irq);
-
-		/* If a packet arrived after we last checked but
-		 * before writing RX_ITR, the interrupt will be
-		 * delayed, so we retrieve it now.
-		 */
-		if (priv->rx_descs[next].report)
-			goto again;
-
-		napi_complete_done(napi, work);
-	}
-
-	return work;
-}
-
-static void __nb8800_tx_dma_start(struct net_device *dev)
-{
-	struct nb8800_priv *priv = netdev_priv(dev);
-	struct nb8800_tx_buf *txb;
-	u32 txc_cr;
-
-	txb = &priv->tx_bufs[priv->tx_queue];
-	if (!txb->ready)
-		return;
-
-	txc_cr = nb8800_readl(priv, NB8800_TXC_CR);
-	if (txc_cr & TCR_EN)
-		return;
-
-	nb8800_writel(priv, NB8800_TX_DESC_ADDR, txb->dma_desc);
-	wmb();		/* ensure desc addr is written before starting DMA */
-	nb8800_writel(priv, NB8800_TXC_CR, txc_cr | TCR_EN);
-
-	priv->tx_queue = (priv->tx_queue + txb->chain_len) % TX_DESC_COUNT;
-}
-
-static void nb8800_tx_dma_start(struct net_device *dev)
-{
-	struct nb8800_priv *priv = netdev_priv(dev);
-
-	spin_lock_irq(&priv->tx_lock);
-	__nb8800_tx_dma_start(dev);
-	spin_unlock_irq(&priv->tx_lock);
-}
-
-static void nb8800_tx_dma_start_irq(struct net_device *dev)
-{
-	struct nb8800_priv *priv = netdev_priv(dev);
-
-	spin_lock(&priv->tx_lock);
-	__nb8800_tx_dma_start(dev);
-	spin_unlock(&priv->tx_lock);
-}
-
-static netdev_tx_t nb8800_xmit(struct sk_buff *skb, struct net_device *dev)
-{
-	struct nb8800_priv *priv = netdev_priv(dev);
-	struct nb8800_tx_desc *txd;
-	struct nb8800_tx_buf *txb;
-	struct nb8800_dma_desc *desc;
-	dma_addr_t dma_addr;
-	unsigned int dma_len;
-	unsigned int align;
-	unsigned int next;
-	bool xmit_more;
-
-	if (atomic_read(&priv->tx_free) <= NB8800_DESC_LOW) {
-		netif_stop_queue(dev);
-		return NETDEV_TX_BUSY;
-	}
-
-	align = (8 - (uintptr_t)skb->data) & 7;
-
-	dma_len = skb->len - align;
-	dma_addr = dma_map_single(&dev->dev, skb->data + align,
-				  dma_len, DMA_TO_DEVICE);
-
-	if (dma_mapping_error(&dev->dev, dma_addr)) {
-		netdev_err(dev, "tx dma mapping error\n");
-		kfree_skb(skb);
-		dev->stats.tx_dropped++;
-		return NETDEV_TX_OK;
-	}
-
-	xmit_more = netdev_xmit_more();
-	if (atomic_dec_return(&priv->tx_free) <= NB8800_DESC_LOW) {
-		netif_stop_queue(dev);
-		xmit_more = false;
-	}
-
-	next = priv->tx_next;
-	txb = &priv->tx_bufs[next];
-	txd = &priv->tx_descs[next];
-	desc = &txd->desc[0];
-
-	next = (next + 1) % TX_DESC_COUNT;
-
-	if (align) {
-		memcpy(txd->buf, skb->data, align);
-
-		desc->s_addr =
-			txb->dma_desc + offsetof(struct nb8800_tx_desc, buf);
-		desc->n_addr = txb->dma_desc + sizeof(txd->desc[0]);
-		desc->config = DESC_BTS(2) | DESC_DS | align;
-
-		desc++;
-	}
-
-	desc->s_addr = dma_addr;
-	desc->n_addr = priv->tx_bufs[next].dma_desc;
-	desc->config = DESC_BTS(2) | DESC_DS | DESC_EOF | dma_len;
-
-	if (!xmit_more)
-		desc->config |= DESC_EOC;
-
-	txb->skb = skb;
-	txb->dma_addr = dma_addr;
-	txb->dma_len = dma_len;
-
-	if (!priv->tx_chain) {
-		txb->chain_len = 1;
-		priv->tx_chain = txb;
-	} else {
-		priv->tx_chain->chain_len++;
-	}
-
-	netdev_sent_queue(dev, skb->len);
-
-	priv->tx_next = next;
-
-	if (!xmit_more) {
-		smp_wmb();
-		priv->tx_chain->ready = true;
-		priv->tx_chain = NULL;
-		nb8800_tx_dma_start(dev);
-	}
-
-	return NETDEV_TX_OK;
-}
-
-static void nb8800_tx_error(struct net_device *dev, u32 report)
-{
-	if (report & TX_LATE_COLLISION)
-		dev->stats.collisions++;
-
-	if (report & TX_PACKET_DROPPED)
-		dev->stats.tx_dropped++;
-
-	if (report & TX_FIFO_UNDERRUN)
-		dev->stats.tx_fifo_errors++;
-
-	dev->stats.tx_errors++;
-}
-
-static void nb8800_tx_done(struct net_device *dev)
-{
-	struct nb8800_priv *priv = netdev_priv(dev);
-	unsigned int limit = priv->tx_next;
-	unsigned int done = priv->tx_done;
-	unsigned int packets = 0;
-	unsigned int len = 0;
-
-	while (done != limit) {
-		struct nb8800_tx_desc *txd = &priv->tx_descs[done];
-		struct nb8800_tx_buf *txb = &priv->tx_bufs[done];
-		struct sk_buff *skb;
-
-		if (!txd->report)
-			break;
-
-		skb = txb->skb;
-		len += skb->len;
-
-		dma_unmap_single(&dev->dev, txb->dma_addr, txb->dma_len,
-				 DMA_TO_DEVICE);
-
-		if (IS_TX_ERROR(txd->report)) {
-			nb8800_tx_error(dev, txd->report);
-			kfree_skb(skb);
-		} else {
-			consume_skb(skb);
-		}
-
-		dev->stats.tx_packets++;
-		dev->stats.tx_bytes += TX_BYTES_TRANSFERRED(txd->report);
-		dev->stats.collisions += TX_EARLY_COLLISIONS(txd->report);
-
-		txb->skb = NULL;
-		txb->ready = false;
-		txd->report = 0;
-
-		done = (done + 1) % TX_DESC_COUNT;
-		packets++;
-	}
-
-	if (packets) {
-		smp_mb__before_atomic();
-		atomic_add(packets, &priv->tx_free);
-		netdev_completed_queue(dev, packets, len);
-		netif_wake_queue(dev);
-		priv->tx_done = done;
-	}
-}
-
-static irqreturn_t nb8800_irq(int irq, void *dev_id)
-{
-	struct net_device *dev = dev_id;
-	struct nb8800_priv *priv = netdev_priv(dev);
-	irqreturn_t ret = IRQ_NONE;
-	u32 val;
-
-	/* tx interrupt */
-	val = nb8800_readl(priv, NB8800_TXC_SR);
-	if (val) {
-		nb8800_writel(priv, NB8800_TXC_SR, val);
-
-		if (val & TSR_DI)
-			nb8800_tx_dma_start_irq(dev);
-
-		if (val & TSR_TI)
-			napi_schedule_irqoff(&priv->napi);
-
-		if (unlikely(val & TSR_DE))
-			netdev_err(dev, "TX DMA error\n");
-
-		/* should never happen with automatic status retrieval */
-		if (unlikely(val & TSR_TO))
-			netdev_err(dev, "TX Status FIFO overflow\n");
-
-		ret = IRQ_HANDLED;
-	}
-
-	/* rx interrupt */
-	val = nb8800_readl(priv, NB8800_RXC_SR);
-	if (val) {
-		nb8800_writel(priv, NB8800_RXC_SR, val);
-
-		if (likely(val & (RSR_RI | RSR_DI))) {
-			nb8800_writel(priv, NB8800_RX_ITR, priv->rx_itr_poll);
-			napi_schedule_irqoff(&priv->napi);
-		}
-
-		if (unlikely(val & RSR_DE))
-			netdev_err(dev, "RX DMA error\n");
-
-		/* should never happen with automatic status retrieval */
-		if (unlikely(val & RSR_RO))
-			netdev_err(dev, "RX Status FIFO overflow\n");
-
-		ret = IRQ_HANDLED;
-	}
-
-	return ret;
-}
-
-static void nb8800_mac_config(struct net_device *dev)
-{
-	struct nb8800_priv *priv = netdev_priv(dev);
-	bool gigabit = priv->speed == SPEED_1000;
-	u32 mac_mode_mask = RGMII_MODE | HALF_DUPLEX | GMAC_MODE;
-	u32 mac_mode = 0;
-	u32 slot_time;
-	u32 phy_clk;
-	u32 ict;
-
-	if (!priv->duplex)
-		mac_mode |= HALF_DUPLEX;
-
-	if (gigabit) {
-		if (phy_interface_is_rgmii(dev->phydev))
-			mac_mode |= RGMII_MODE;
-
-		mac_mode |= GMAC_MODE;
-		phy_clk = 125000000;
-
-		/* Should be 512 but register is only 8 bits */
-		slot_time = 255;
-	} else {
-		phy_clk = 25000000;
-		slot_time = 128;
-	}
-
-	ict = DIV_ROUND_UP(phy_clk, clk_get_rate(priv->clk));
-
-	nb8800_writeb(priv, NB8800_IC_THRESHOLD, ict);
-	nb8800_writeb(priv, NB8800_SLOT_TIME, slot_time);
-	nb8800_maskb(priv, NB8800_MAC_MODE, mac_mode_mask, mac_mode);
-}
-
-static void nb8800_pause_config(struct net_device *dev)
-{
-	struct nb8800_priv *priv = netdev_priv(dev);
-	struct phy_device *phydev = dev->phydev;
-	u32 rxcr;
-
-	if (priv->pause_aneg) {
-		if (!phydev || !phydev->link)
-			return;
-
-		priv->pause_rx = phydev->pause;
-		priv->pause_tx = phydev->pause ^ phydev->asym_pause;
-	}
-
-	nb8800_modb(priv, NB8800_RX_CTL, RX_PAUSE_EN, priv->pause_rx);
-
-	rxcr = nb8800_readl(priv, NB8800_RXC_CR);
-	if (!!(rxcr & RCR_FL) == priv->pause_tx)
-		return;
-
-	if (netif_running(dev)) {
-		napi_disable(&priv->napi);
-		netif_tx_lock_bh(dev);
-		nb8800_dma_stop(dev);
-		nb8800_modl(priv, NB8800_RXC_CR, RCR_FL, priv->pause_tx);
-		nb8800_start_rx(dev);
-		netif_tx_unlock_bh(dev);
-		napi_enable(&priv->napi);
-	} else {
-		nb8800_modl(priv, NB8800_RXC_CR, RCR_FL, priv->pause_tx);
-	}
-}
-
-static void nb8800_link_reconfigure(struct net_device *dev)
-{
-	struct nb8800_priv *priv = netdev_priv(dev);
-	struct phy_device *phydev = dev->phydev;
-	int change = 0;
-
-	if (phydev->link) {
-		if (phydev->speed != priv->speed) {
-			priv->speed = phydev->speed;
-			change = 1;
-		}
-
-		if (phydev->duplex != priv->duplex) {
-			priv->duplex = phydev->duplex;
-			change = 1;
-		}
-
-		if (change)
-			nb8800_mac_config(dev);
-
-		nb8800_pause_config(dev);
-	}
-
-	if (phydev->link != priv->link) {
-		priv->link = phydev->link;
-		change = 1;
-	}
-
-	if (change)
-		phy_print_status(phydev);
-}
-
-static void nb8800_update_mac_addr(struct net_device *dev)
-{
-	struct nb8800_priv *priv = netdev_priv(dev);
-	int i;
-
-	for (i = 0; i < ETH_ALEN; i++)
-		nb8800_writeb(priv, NB8800_SRC_ADDR(i), dev->dev_addr[i]);
-
-	for (i = 0; i < ETH_ALEN; i++)
-		nb8800_writeb(priv, NB8800_UC_ADDR(i), dev->dev_addr[i]);
-}
-
-static int nb8800_set_mac_address(struct net_device *dev, void *addr)
-{
-	struct sockaddr *sock = addr;
-
-	if (netif_running(dev))
-		return -EBUSY;
-
-	ether_addr_copy(dev->dev_addr, sock->sa_data);
-	nb8800_update_mac_addr(dev);
-
-	return 0;
-}
-
-static void nb8800_mc_init(struct net_device *dev, int val)
-{
-	struct nb8800_priv *priv = netdev_priv(dev);
-
-	nb8800_writeb(priv, NB8800_MC_INIT, val);
-	readb_poll_timeout_atomic(priv->base + NB8800_MC_INIT, val, !val,
-				  1, 1000);
-}
-
-static void nb8800_set_rx_mode(struct net_device *dev)
-{
-	struct nb8800_priv *priv = netdev_priv(dev);
-	struct netdev_hw_addr *ha;
-	int i;
-
-	if (dev->flags & (IFF_PROMISC | IFF_ALLMULTI)) {
-		nb8800_mac_af(dev, false);
-		return;
-	}
-
-	nb8800_mac_af(dev, true);
-	nb8800_mc_init(dev, 0);
-
-	netdev_for_each_mc_addr(ha, dev) {
-		for (i = 0; i < ETH_ALEN; i++)
-			nb8800_writeb(priv, NB8800_MC_ADDR(i), ha->addr[i]);
-
-		nb8800_mc_init(dev, 0xff);
-	}
-}
-
-#define RX_DESC_SIZE (RX_DESC_COUNT * sizeof(struct nb8800_rx_desc))
-#define TX_DESC_SIZE (TX_DESC_COUNT * sizeof(struct nb8800_tx_desc))
-
-static void nb8800_dma_free(struct net_device *dev)
-{
-	struct nb8800_priv *priv = netdev_priv(dev);
-	unsigned int i;
-
-	if (priv->rx_bufs) {
-		for (i = 0; i < RX_DESC_COUNT; i++)
-			if (priv->rx_bufs[i].page)
-				put_page(priv->rx_bufs[i].page);
-
-		kfree(priv->rx_bufs);
-		priv->rx_bufs = NULL;
-	}
-
-	if (priv->tx_bufs) {
-		for (i = 0; i < TX_DESC_COUNT; i++)
-			kfree_skb(priv->tx_bufs[i].skb);
-
-		kfree(priv->tx_bufs);
-		priv->tx_bufs = NULL;
-	}
-
-	if (priv->rx_descs) {
-		dma_free_coherent(dev->dev.parent, RX_DESC_SIZE, priv->rx_descs,
-				  priv->rx_desc_dma);
-		priv->rx_descs = NULL;
-	}
-
-	if (priv->tx_descs) {
-		dma_free_coherent(dev->dev.parent, TX_DESC_SIZE, priv->tx_descs,
-				  priv->tx_desc_dma);
-		priv->tx_descs = NULL;
-	}
-}
-
-static void nb8800_dma_reset(struct net_device *dev)
-{
-	struct nb8800_priv *priv = netdev_priv(dev);
-	struct nb8800_rx_desc *rxd;
-	struct nb8800_tx_desc *txd;
-	unsigned int i;
-
-	for (i = 0; i < RX_DESC_COUNT; i++) {
-		dma_addr_t rx_dma = priv->rx_desc_dma + i * sizeof(*rxd);
-
-		rxd = &priv->rx_descs[i];
-		rxd->desc.n_addr = rx_dma + sizeof(*rxd);
-		rxd->desc.r_addr =
-			rx_dma + offsetof(struct nb8800_rx_desc, report);
-		rxd->desc.config = priv->rx_dma_config;
-		rxd->report = 0;
-	}
-
-	rxd->desc.n_addr = priv->rx_desc_dma;
-	rxd->desc.config |= DESC_EOC;
-
-	priv->rx_eoc = RX_DESC_COUNT - 1;
-
-	for (i = 0; i < TX_DESC_COUNT; i++) {
-		struct nb8800_tx_buf *txb = &priv->tx_bufs[i];
-		dma_addr_t r_dma = txb->dma_desc +
-			offsetof(struct nb8800_tx_desc, report);
-
-		txd = &priv->tx_descs[i];
-		txd->desc[0].r_addr = r_dma;
-		txd->desc[1].r_addr = r_dma;
-		txd->report = 0;
-	}
-
-	priv->tx_next = 0;
-	priv->tx_queue = 0;
-	priv->tx_done = 0;
-	atomic_set(&priv->tx_free, TX_DESC_COUNT);
-
-	nb8800_writel(priv, NB8800_RX_DESC_ADDR, priv->rx_desc_dma);
-
-	wmb();		/* ensure all setup is written before starting */
-}
-
-static int nb8800_dma_init(struct net_device *dev)
-{
-	struct nb8800_priv *priv = netdev_priv(dev);
-	unsigned int n_rx = RX_DESC_COUNT;
-	unsigned int n_tx = TX_DESC_COUNT;
-	unsigned int i;
-	int err;
-
-	priv->rx_descs = dma_alloc_coherent(dev->dev.parent, RX_DESC_SIZE,
-					    &priv->rx_desc_dma, GFP_KERNEL);
-	if (!priv->rx_descs)
-		goto err_out;
-
-	priv->rx_bufs = kcalloc(n_rx, sizeof(*priv->rx_bufs), GFP_KERNEL);
-	if (!priv->rx_bufs)
-		goto err_out;
-
-	for (i = 0; i < n_rx; i++) {
-		err = nb8800_alloc_rx(dev, i, false);
-		if (err)
-			goto err_out;
-	}
-
-	priv->tx_descs = dma_alloc_coherent(dev->dev.parent, TX_DESC_SIZE,
-					    &priv->tx_desc_dma, GFP_KERNEL);
-	if (!priv->tx_descs)
-		goto err_out;
-
-	priv->tx_bufs = kcalloc(n_tx, sizeof(*priv->tx_bufs), GFP_KERNEL);
-	if (!priv->tx_bufs)
-		goto err_out;
-
-	for (i = 0; i < n_tx; i++)
-		priv->tx_bufs[i].dma_desc =
-			priv->tx_desc_dma + i * sizeof(struct nb8800_tx_desc);
-
-	nb8800_dma_reset(dev);
-
-	return 0;
-
-err_out:
-	nb8800_dma_free(dev);
-
-	return -ENOMEM;
-}
-
-static int nb8800_dma_stop(struct net_device *dev)
-{
-	struct nb8800_priv *priv = netdev_priv(dev);
-	struct nb8800_tx_buf *txb = &priv->tx_bufs[0];
-	struct nb8800_tx_desc *txd = &priv->tx_descs[0];
-	int retry = 5;
-	u32 txcr;
-	u32 rxcr;
-	int err;
-	unsigned int i;
-
-	/* wait for tx to finish */
-	err = readl_poll_timeout_atomic(priv->base + NB8800_TXC_CR, txcr,
-					!(txcr & TCR_EN) &&
-					priv->tx_done == priv->tx_next,
-					1000, 1000000);
-	if (err)
-		return err;
-
-	/* The rx DMA only stops if it reaches the end of chain.
-	 * To make this happen, we set the EOC flag on all rx
-	 * descriptors, put the device in loopback mode, and send
-	 * a few dummy frames.  The interrupt handler will ignore
-	 * these since NAPI is disabled and no real frames are in
-	 * the tx queue.
-	 */
-
-	for (i = 0; i < RX_DESC_COUNT; i++)
-		priv->rx_descs[i].desc.config |= DESC_EOC;
-
-	txd->desc[0].s_addr =
-		txb->dma_desc + offsetof(struct nb8800_tx_desc, buf);
-	txd->desc[0].config = DESC_BTS(2) | DESC_DS | DESC_EOF | DESC_EOC | 8;
-	memset(txd->buf, 0, sizeof(txd->buf));
-
-	nb8800_mac_af(dev, false);
-	nb8800_setb(priv, NB8800_MAC_MODE, LOOPBACK_EN);
-
-	do {
-		nb8800_writel(priv, NB8800_TX_DESC_ADDR, txb->dma_desc);
-		wmb();
-		nb8800_writel(priv, NB8800_TXC_CR, txcr | TCR_EN);
-
-		err = readl_poll_timeout_atomic(priv->base + NB8800_RXC_CR,
-						rxcr, !(rxcr & RCR_EN),
-						1000, 100000);
-	} while (err && --retry);
-
-	nb8800_mac_af(dev, true);
-	nb8800_clearb(priv, NB8800_MAC_MODE, LOOPBACK_EN);
-	nb8800_dma_reset(dev);
-
-	return retry ? 0 : -ETIMEDOUT;
-}
-
-static void nb8800_pause_adv(struct net_device *dev)
-{
-	struct nb8800_priv *priv = netdev_priv(dev);
-	struct phy_device *phydev = dev->phydev;
-
-	if (!phydev)
-		return;
-
-	phy_set_asym_pause(phydev, priv->pause_rx, priv->pause_tx);
-}
-
-static int nb8800_open(struct net_device *dev)
-{
-	struct nb8800_priv *priv = netdev_priv(dev);
-	struct phy_device *phydev;
-	int err;
-
-	/* clear any pending interrupts */
-	nb8800_writel(priv, NB8800_RXC_SR, 0xf);
-	nb8800_writel(priv, NB8800_TXC_SR, 0xf);
-
-	err = nb8800_dma_init(dev);
-	if (err)
-		return err;
-
-	err = request_irq(dev->irq, nb8800_irq, 0, dev_name(&dev->dev), dev);
-	if (err)
-		goto err_free_dma;
-
-	nb8800_mac_rx(dev, true);
-	nb8800_mac_tx(dev, true);
-
-	phydev = of_phy_connect(dev, priv->phy_node,
-				nb8800_link_reconfigure, 0,
-				priv->phy_mode);
-	if (!phydev) {
-		err = -ENODEV;
-		goto err_free_irq;
-	}
-
-	nb8800_pause_adv(dev);
-
-	netdev_reset_queue(dev);
-	napi_enable(&priv->napi);
-	netif_start_queue(dev);
-
-	nb8800_start_rx(dev);
-	phy_start(phydev);
-
-	return 0;
-
-err_free_irq:
-	free_irq(dev->irq, dev);
-err_free_dma:
-	nb8800_dma_free(dev);
-
-	return err;
-}
-
-static int nb8800_stop(struct net_device *dev)
-{
-	struct nb8800_priv *priv = netdev_priv(dev);
-	struct phy_device *phydev = dev->phydev;
-
-	phy_stop(phydev);
-
-	netif_stop_queue(dev);
-	napi_disable(&priv->napi);
-
-	nb8800_dma_stop(dev);
-	nb8800_mac_rx(dev, false);
-	nb8800_mac_tx(dev, false);
-
-	phy_disconnect(phydev);
-
-	free_irq(dev->irq, dev);
-
-	nb8800_dma_free(dev);
-
-	return 0;
-}
-
-static const struct net_device_ops nb8800_netdev_ops = {
-	.ndo_open		= nb8800_open,
-	.ndo_stop		= nb8800_stop,
-	.ndo_start_xmit		= nb8800_xmit,
-	.ndo_set_mac_address	= nb8800_set_mac_address,
-	.ndo_set_rx_mode	= nb8800_set_rx_mode,
-	.ndo_do_ioctl		= phy_do_ioctl,
-	.ndo_validate_addr	= eth_validate_addr,
-};
-
-static void nb8800_get_pauseparam(struct net_device *dev,
-				  struct ethtool_pauseparam *pp)
-{
-	struct nb8800_priv *priv = netdev_priv(dev);
-
-	pp->autoneg = priv->pause_aneg;
-	pp->rx_pause = priv->pause_rx;
-	pp->tx_pause = priv->pause_tx;
-}
-
-static int nb8800_set_pauseparam(struct net_device *dev,
-				 struct ethtool_pauseparam *pp)
-{
-	struct nb8800_priv *priv = netdev_priv(dev);
-	struct phy_device *phydev = dev->phydev;
-
-	priv->pause_aneg = pp->autoneg;
-	priv->pause_rx = pp->rx_pause;
-	priv->pause_tx = pp->tx_pause;
-
-	nb8800_pause_adv(dev);
-
-	if (!priv->pause_aneg)
-		nb8800_pause_config(dev);
-	else if (phydev)
-		phy_start_aneg(phydev);
-
-	return 0;
-}
-
-static const char nb8800_stats_names[][ETH_GSTRING_LEN] = {
-	"rx_bytes_ok",
-	"rx_frames_ok",
-	"rx_undersize_frames",
-	"rx_fragment_frames",
-	"rx_64_byte_frames",
-	"rx_127_byte_frames",
-	"rx_255_byte_frames",
-	"rx_511_byte_frames",
-	"rx_1023_byte_frames",
-	"rx_max_size_frames",
-	"rx_oversize_frames",
-	"rx_bad_fcs_frames",
-	"rx_broadcast_frames",
-	"rx_multicast_frames",
-	"rx_control_frames",
-	"rx_pause_frames",
-	"rx_unsup_control_frames",
-	"rx_align_error_frames",
-	"rx_overrun_frames",
-	"rx_jabber_frames",
-	"rx_bytes",
-	"rx_frames",
-
-	"tx_bytes_ok",
-	"tx_frames_ok",
-	"tx_64_byte_frames",
-	"tx_127_byte_frames",
-	"tx_255_byte_frames",
-	"tx_511_byte_frames",
-	"tx_1023_byte_frames",
-	"tx_max_size_frames",
-	"tx_oversize_frames",
-	"tx_broadcast_frames",
-	"tx_multicast_frames",
-	"tx_control_frames",
-	"tx_pause_frames",
-	"tx_underrun_frames",
-	"tx_single_collision_frames",
-	"tx_multi_collision_frames",
-	"tx_deferred_collision_frames",
-	"tx_late_collision_frames",
-	"tx_excessive_collision_frames",
-	"tx_bytes",
-	"tx_frames",
-	"tx_collisions",
-};
-
-#define NB8800_NUM_STATS ARRAY_SIZE(nb8800_stats_names)
-
-static int nb8800_get_sset_count(struct net_device *dev, int sset)
-{
-	if (sset == ETH_SS_STATS)
-		return NB8800_NUM_STATS;
-
-	return -EOPNOTSUPP;
-}
-
-static void nb8800_get_strings(struct net_device *dev, u32 sset, u8 *buf)
-{
-	if (sset == ETH_SS_STATS)
-		memcpy(buf, &nb8800_stats_names, sizeof(nb8800_stats_names));
-}
-
-static u32 nb8800_read_stat(struct net_device *dev, int index)
-{
-	struct nb8800_priv *priv = netdev_priv(dev);
-
-	nb8800_writeb(priv, NB8800_STAT_INDEX, index);
-
-	return nb8800_readl(priv, NB8800_STAT_DATA);
-}
-
-static void nb8800_get_ethtool_stats(struct net_device *dev,
-				     struct ethtool_stats *estats, u64 *st)
-{
-	unsigned int i;
-	u32 rx, tx;
-
-	for (i = 0; i < NB8800_NUM_STATS / 2; i++) {
-		rx = nb8800_read_stat(dev, i);
-		tx = nb8800_read_stat(dev, i | 0x80);
-		st[i] = rx;
-		st[i + NB8800_NUM_STATS / 2] = tx;
-	}
-}
-
-static const struct ethtool_ops nb8800_ethtool_ops = {
-	.nway_reset		= phy_ethtool_nway_reset,
-	.get_link		= ethtool_op_get_link,
-	.get_pauseparam		= nb8800_get_pauseparam,
-	.set_pauseparam		= nb8800_set_pauseparam,
-	.get_sset_count		= nb8800_get_sset_count,
-	.get_strings		= nb8800_get_strings,
-	.get_ethtool_stats	= nb8800_get_ethtool_stats,
-	.get_link_ksettings	= phy_ethtool_get_link_ksettings,
-	.set_link_ksettings	= phy_ethtool_set_link_ksettings,
-};
-
-static int nb8800_hw_init(struct net_device *dev)
-{
-	struct nb8800_priv *priv = netdev_priv(dev);
-	u32 val;
-
-	val = TX_RETRY_EN | TX_PAD_EN | TX_APPEND_FCS;
-	nb8800_writeb(priv, NB8800_TX_CTL1, val);
-
-	/* Collision retry count */
-	nb8800_writeb(priv, NB8800_TX_CTL2, 5);
-
-	val = RX_PAD_STRIP | RX_AF_EN;
-	nb8800_writeb(priv, NB8800_RX_CTL, val);
-
-	/* Chosen by fair dice roll */
-	nb8800_writeb(priv, NB8800_RANDOM_SEED, 4);
-
-	/* TX cycles per deferral period */
-	nb8800_writeb(priv, NB8800_TX_SDP, 12);
-
-	/* The following three threshold values have been
-	 * experimentally determined for good results.
-	 */
-
-	/* RX/TX FIFO threshold for partial empty (64-bit entries) */
-	nb8800_writeb(priv, NB8800_PE_THRESHOLD, 0);
-
-	/* RX/TX FIFO threshold for partial full (64-bit entries) */
-	nb8800_writeb(priv, NB8800_PF_THRESHOLD, 255);
-
-	/* Buffer size for transmit (64-bit entries) */
-	nb8800_writeb(priv, NB8800_TX_BUFSIZE, 64);
-
-	/* Configure tx DMA */
-
-	val = nb8800_readl(priv, NB8800_TXC_CR);
-	val &= TCR_LE;		/* keep endian setting */
-	val |= TCR_DM;		/* DMA descriptor mode */
-	val |= TCR_RS;		/* automatically store tx status  */
-	val |= TCR_DIE;		/* interrupt on DMA chain completion */
-	val |= TCR_TFI(7);	/* interrupt after 7 frames transmitted */
-	val |= TCR_BTS(2);	/* 32-byte bus transaction size */
-	nb8800_writel(priv, NB8800_TXC_CR, val);
-
-	/* TX complete interrupt after 10 ms or 7 frames (see above) */
-	val = clk_get_rate(priv->clk) / 100;
-	nb8800_writel(priv, NB8800_TX_ITR, val);
-
-	/* Configure rx DMA */
-
-	val = nb8800_readl(priv, NB8800_RXC_CR);
-	val &= RCR_LE;		/* keep endian setting */
-	val |= RCR_DM;		/* DMA descriptor mode */
-	val |= RCR_RS;		/* automatically store rx status */
-	val |= RCR_DIE;		/* interrupt at end of DMA chain */
-	val |= RCR_RFI(7);	/* interrupt after 7 frames received */
-	val |= RCR_BTS(2);	/* 32-byte bus transaction size */
-	nb8800_writel(priv, NB8800_RXC_CR, val);
-
-	/* The rx interrupt can fire before the DMA has completed
-	 * unless a small delay is added.  50 us is hopefully enough.
-	 */
-	priv->rx_itr_irq = clk_get_rate(priv->clk) / 20000;
-
-	/* In NAPI poll mode we want to disable interrupts, but the
-	 * hardware does not permit this.  Delay 10 ms instead.
-	 */
-	priv->rx_itr_poll = clk_get_rate(priv->clk) / 100;
-
-	nb8800_writel(priv, NB8800_RX_ITR, priv->rx_itr_irq);
-
-	priv->rx_dma_config = RX_BUF_SIZE | DESC_BTS(2) | DESC_DS | DESC_EOF;
-
-	/* Flow control settings */
-
-	/* Pause time of 0.1 ms */
-	val = 100000 / 512;
-	nb8800_writeb(priv, NB8800_PQ1, val >> 8);
-	nb8800_writeb(priv, NB8800_PQ2, val & 0xff);
-
-	/* Auto-negotiate by default */
-	priv->pause_aneg = true;
-	priv->pause_rx = true;
-	priv->pause_tx = true;
-
-	nb8800_mc_init(dev, 0);
-
-	return 0;
-}
-
-static int nb8800_tangox_init(struct net_device *dev)
-{
-	struct nb8800_priv *priv = netdev_priv(dev);
-	u32 pad_mode = PAD_MODE_MII;
-
-	switch (priv->phy_mode) {
-	case PHY_INTERFACE_MODE_MII:
-	case PHY_INTERFACE_MODE_GMII:
-		pad_mode = PAD_MODE_MII;
-		break;
-
-	case PHY_INTERFACE_MODE_RGMII:
-	case PHY_INTERFACE_MODE_RGMII_ID:
-	case PHY_INTERFACE_MODE_RGMII_RXID:
-	case PHY_INTERFACE_MODE_RGMII_TXID:
-		pad_mode = PAD_MODE_RGMII;
-		break;
-
-	default:
-		dev_err(dev->dev.parent, "unsupported phy mode %s\n",
-			phy_modes(priv->phy_mode));
-		return -EINVAL;
-	}
-
-	nb8800_writeb(priv, NB8800_TANGOX_PAD_MODE, pad_mode);
-
-	return 0;
-}
-
-static int nb8800_tangox_reset(struct net_device *dev)
-{
-	struct nb8800_priv *priv = netdev_priv(dev);
-	int clk_div;
-
-	nb8800_writeb(priv, NB8800_TANGOX_RESET, 0);
-	usleep_range(1000, 10000);
-	nb8800_writeb(priv, NB8800_TANGOX_RESET, 1);
-
-	wmb();		/* ensure reset is cleared before proceeding */
-
-	clk_div = DIV_ROUND_UP(clk_get_rate(priv->clk), 2 * MAX_MDC_CLOCK);
-	nb8800_writew(priv, NB8800_TANGOX_MDIO_CLKDIV, clk_div);
-
-	return 0;
-}
-
-static const struct nb8800_ops nb8800_tangox_ops = {
-	.init	= nb8800_tangox_init,
-	.reset	= nb8800_tangox_reset,
-};
-
-static int nb8800_tango4_init(struct net_device *dev)
-{
-	struct nb8800_priv *priv = netdev_priv(dev);
-	int err;
-
-	err = nb8800_tangox_init(dev);
-	if (err)
-		return err;
-
-	/* On tango4 interrupt on DMA completion per frame works and gives
-	 * better performance despite generating more rx interrupts.
-	 */
-
-	/* Disable unnecessary interrupt on rx completion */
-	nb8800_clearl(priv, NB8800_RXC_CR, RCR_RFI(7));
-
-	/* Request interrupt on descriptor DMA completion */
-	priv->rx_dma_config |= DESC_ID;
-
-	return 0;
-}
-
-static const struct nb8800_ops nb8800_tango4_ops = {
-	.init	= nb8800_tango4_init,
-	.reset	= nb8800_tangox_reset,
-};
-
-static const struct of_device_id nb8800_dt_ids[] = {
-	{
-		.compatible = "aurora,nb8800",
-	},
-	{
-		.compatible = "sigma,smp8642-ethernet",
-		.data = &nb8800_tangox_ops,
-	},
-	{
-		.compatible = "sigma,smp8734-ethernet",
-		.data = &nb8800_tango4_ops,
-	},
-	{ }
-};
-MODULE_DEVICE_TABLE(of, nb8800_dt_ids);
-
-static int nb8800_probe(struct platform_device *pdev)
-{
-	const struct of_device_id *match;
-	const struct nb8800_ops *ops = NULL;
-	struct nb8800_priv *priv;
-	struct resource *res;
-	struct net_device *dev;
-	struct mii_bus *bus;
-	const unsigned char *mac;
-	void __iomem *base;
-	int irq;
-	int ret;
-
-	match = of_match_device(nb8800_dt_ids, &pdev->dev);
-	if (match)
-		ops = match->data;
-
-	irq = platform_get_irq(pdev, 0);
-	if (irq <= 0)
-		return -EINVAL;
-
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	base = devm_ioremap_resource(&pdev->dev, res);
-	if (IS_ERR(base))
-		return PTR_ERR(base);
-
-	dev_dbg(&pdev->dev, "AU-NB8800 Ethernet at %pa\n", &res->start);
-
-	dev = alloc_etherdev(sizeof(*priv));
-	if (!dev)
-		return -ENOMEM;
-
-	platform_set_drvdata(pdev, dev);
-	SET_NETDEV_DEV(dev, &pdev->dev);
-
-	priv = netdev_priv(dev);
-	priv->base = base;
-
-	ret = of_get_phy_mode(pdev->dev.of_node, &priv->phy_mode);
-	if (ret)
-		priv->phy_mode = PHY_INTERFACE_MODE_RGMII;
-
-	priv->clk = devm_clk_get(&pdev->dev, NULL);
-	if (IS_ERR(priv->clk)) {
-		dev_err(&pdev->dev, "failed to get clock\n");
-		ret = PTR_ERR(priv->clk);
-		goto err_free_dev;
-	}
-
-	ret = clk_prepare_enable(priv->clk);
-	if (ret)
-		goto err_free_dev;
-
-	spin_lock_init(&priv->tx_lock);
-
-	if (ops && ops->reset) {
-		ret = ops->reset(dev);
-		if (ret)
-			goto err_disable_clk;
-	}
-
-	bus = devm_mdiobus_alloc(&pdev->dev);
-	if (!bus) {
-		ret = -ENOMEM;
-		goto err_disable_clk;
-	}
-
-	bus->name = "nb8800-mii";
-	bus->read = nb8800_mdio_read;
-	bus->write = nb8800_mdio_write;
-	bus->parent = &pdev->dev;
-	snprintf(bus->id, MII_BUS_ID_SIZE, "%lx.nb8800-mii",
-		 (unsigned long)res->start);
-	bus->priv = priv;
-
-	ret = of_mdiobus_register(bus, pdev->dev.of_node);
-	if (ret) {
-		dev_err(&pdev->dev, "failed to register MII bus\n");
-		goto err_disable_clk;
-	}
-
-	if (of_phy_is_fixed_link(pdev->dev.of_node)) {
-		ret = of_phy_register_fixed_link(pdev->dev.of_node);
-		if (ret < 0) {
-			dev_err(&pdev->dev, "bad fixed-link spec\n");
-			goto err_free_bus;
-		}
-		priv->phy_node = of_node_get(pdev->dev.of_node);
-	}
-
-	if (!priv->phy_node)
-		priv->phy_node = of_parse_phandle(pdev->dev.of_node,
-						  "phy-handle", 0);
-
-	if (!priv->phy_node) {
-		dev_err(&pdev->dev, "no PHY specified\n");
-		ret = -ENODEV;
-		goto err_free_bus;
-	}
-
-	priv->mii_bus = bus;
-
-	ret = nb8800_hw_init(dev);
-	if (ret)
-		goto err_deregister_fixed_link;
-
-	if (ops && ops->init) {
-		ret = ops->init(dev);
-		if (ret)
-			goto err_deregister_fixed_link;
-	}
-
-	dev->netdev_ops = &nb8800_netdev_ops;
-	dev->ethtool_ops = &nb8800_ethtool_ops;
-	dev->flags |= IFF_MULTICAST;
-	dev->irq = irq;
-
-	mac = of_get_mac_address(pdev->dev.of_node);
-	if (!IS_ERR(mac))
-		ether_addr_copy(dev->dev_addr, mac);
-
-	if (!is_valid_ether_addr(dev->dev_addr))
-		eth_hw_addr_random(dev);
-
-	nb8800_update_mac_addr(dev);
-
-	netif_carrier_off(dev);
-
-	ret = register_netdev(dev);
-	if (ret) {
-		netdev_err(dev, "failed to register netdev\n");
-		goto err_free_dma;
-	}
-
-	netif_napi_add(dev, &priv->napi, nb8800_poll, NAPI_POLL_WEIGHT);
-
-	netdev_info(dev, "MAC address %pM\n", dev->dev_addr);
-
-	return 0;
-
-err_free_dma:
-	nb8800_dma_free(dev);
-err_deregister_fixed_link:
-	if (of_phy_is_fixed_link(pdev->dev.of_node))
-		of_phy_deregister_fixed_link(pdev->dev.of_node);
-err_free_bus:
-	of_node_put(priv->phy_node);
-	mdiobus_unregister(bus);
-err_disable_clk:
-	clk_disable_unprepare(priv->clk);
-err_free_dev:
-	free_netdev(dev);
-
-	return ret;
-}
-
-static int nb8800_remove(struct platform_device *pdev)
-{
-	struct net_device *ndev = platform_get_drvdata(pdev);
-	struct nb8800_priv *priv = netdev_priv(ndev);
-
-	unregister_netdev(ndev);
-	if (of_phy_is_fixed_link(pdev->dev.of_node))
-		of_phy_deregister_fixed_link(pdev->dev.of_node);
-	of_node_put(priv->phy_node);
-
-	mdiobus_unregister(priv->mii_bus);
-
-	clk_disable_unprepare(priv->clk);
-
-	nb8800_dma_free(ndev);
-	free_netdev(ndev);
-
-	return 0;
-}
-
-static struct platform_driver nb8800_driver = {
-	.driver = {
-		.name		= "nb8800",
-		.of_match_table	= nb8800_dt_ids,
-	},
-	.probe	= nb8800_probe,
-	.remove	= nb8800_remove,
-};
-
-module_platform_driver(nb8800_driver);
-
-MODULE_DESCRIPTION("Aurora AU-NB8800 Ethernet driver");
-MODULE_AUTHOR("Mans Rullgard <mans@mansr.com>");
-MODULE_LICENSE("GPL");
diff --git a/drivers/net/ethernet/aurora/nb8800.h b/drivers/net/ethernet/aurora/nb8800.h
deleted file mode 100644
index 40941fb6065b..000000000000
--- a/drivers/net/ethernet/aurora/nb8800.h
+++ /dev/null
@@ -1,316 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef _NB8800_H_
-#define _NB8800_H_
-
-#include <linux/types.h>
-#include <linux/skbuff.h>
-#include <linux/phy.h>
-#include <linux/clk.h>
-#include <linux/bitops.h>
-
-#define RX_DESC_COUNT			256
-#define TX_DESC_COUNT			256
-
-#define NB8800_DESC_LOW			4
-
-#define RX_BUF_SIZE			1552
-
-#define RX_COPYBREAK			256
-#define RX_COPYHDR			128
-
-#define MAX_MDC_CLOCK			2500000
-
-/* Stargate Solutions SSN8800 core registers */
-#define NB8800_TX_CTL1			0x000
-#define TX_TPD				BIT(5)
-#define TX_APPEND_FCS			BIT(4)
-#define TX_PAD_EN			BIT(3)
-#define TX_RETRY_EN			BIT(2)
-#define TX_EN				BIT(0)
-
-#define NB8800_TX_CTL2			0x001
-
-#define NB8800_RX_CTL			0x004
-#define RX_BC_DISABLE			BIT(7)
-#define RX_RUNT				BIT(6)
-#define RX_AF_EN			BIT(5)
-#define RX_PAUSE_EN			BIT(3)
-#define RX_SEND_CRC			BIT(2)
-#define RX_PAD_STRIP			BIT(1)
-#define RX_EN				BIT(0)
-
-#define NB8800_RANDOM_SEED		0x008
-#define NB8800_TX_SDP			0x14
-#define NB8800_TX_TPDP1			0x18
-#define NB8800_TX_TPDP2			0x19
-#define NB8800_SLOT_TIME		0x1c
-
-#define NB8800_MDIO_CMD			0x020
-#define MDIO_CMD_GO			BIT(31)
-#define MDIO_CMD_WR			BIT(26)
-#define MDIO_CMD_ADDR(x)		((x) << 21)
-#define MDIO_CMD_REG(x)			((x) << 16)
-#define MDIO_CMD_DATA(x)		((x) <<	 0)
-
-#define NB8800_MDIO_STS			0x024
-#define MDIO_STS_ERR			BIT(31)
-
-#define NB8800_MC_ADDR(i)		(0x028 + (i))
-#define NB8800_MC_INIT			0x02e
-#define NB8800_UC_ADDR(i)		(0x03c + (i))
-
-#define NB8800_MAC_MODE			0x044
-#define RGMII_MODE			BIT(7)
-#define HALF_DUPLEX			BIT(4)
-#define BURST_EN			BIT(3)
-#define LOOPBACK_EN			BIT(2)
-#define GMAC_MODE			BIT(0)
-
-#define NB8800_IC_THRESHOLD		0x050
-#define NB8800_PE_THRESHOLD		0x051
-#define NB8800_PF_THRESHOLD		0x052
-#define NB8800_TX_BUFSIZE		0x054
-#define NB8800_FIFO_CTL			0x056
-#define NB8800_PQ1			0x060
-#define NB8800_PQ2			0x061
-#define NB8800_SRC_ADDR(i)		(0x06a + (i))
-#define NB8800_STAT_DATA		0x078
-#define NB8800_STAT_INDEX		0x07c
-#define NB8800_STAT_CLEAR		0x07d
-
-#define NB8800_SLEEP_MODE		0x07e
-#define SLEEP_MODE			BIT(0)
-
-#define NB8800_WAKEUP			0x07f
-#define WAKEUP				BIT(0)
-
-/* Aurora NB8800 host interface registers */
-#define NB8800_TXC_CR			0x100
-#define TCR_LK				BIT(12)
-#define TCR_DS				BIT(11)
-#define TCR_BTS(x)			(((x) & 0x7) << 8)
-#define TCR_DIE				BIT(7)
-#define TCR_TFI(x)			(((x) & 0x7) << 4)
-#define TCR_LE				BIT(3)
-#define TCR_RS				BIT(2)
-#define TCR_DM				BIT(1)
-#define TCR_EN				BIT(0)
-
-#define NB8800_TXC_SR			0x104
-#define TSR_DE				BIT(3)
-#define TSR_DI				BIT(2)
-#define TSR_TO				BIT(1)
-#define TSR_TI				BIT(0)
-
-#define NB8800_TX_SAR			0x108
-#define NB8800_TX_DESC_ADDR		0x10c
-
-#define NB8800_TX_REPORT_ADDR		0x110
-#define TX_BYTES_TRANSFERRED(x)		(((x) >> 16) & 0xffff)
-#define TX_FIRST_DEFERRAL		BIT(7)
-#define TX_EARLY_COLLISIONS(x)		(((x) >> 3) & 0xf)
-#define TX_LATE_COLLISION		BIT(2)
-#define TX_PACKET_DROPPED		BIT(1)
-#define TX_FIFO_UNDERRUN		BIT(0)
-#define IS_TX_ERROR(r)			((r) & 0x07)
-
-#define NB8800_TX_FIFO_SR		0x114
-#define NB8800_TX_ITR			0x118
-
-#define NB8800_RXC_CR			0x200
-#define RCR_FL				BIT(13)
-#define RCR_LK				BIT(12)
-#define RCR_DS				BIT(11)
-#define RCR_BTS(x)			(((x) & 7) << 8)
-#define RCR_DIE				BIT(7)
-#define RCR_RFI(x)			(((x) & 7) << 4)
-#define RCR_LE				BIT(3)
-#define RCR_RS				BIT(2)
-#define RCR_DM				BIT(1)
-#define RCR_EN				BIT(0)
-
-#define NB8800_RXC_SR			0x204
-#define RSR_DE				BIT(3)
-#define RSR_DI				BIT(2)
-#define RSR_RO				BIT(1)
-#define RSR_RI				BIT(0)
-
-#define NB8800_RX_SAR			0x208
-#define NB8800_RX_DESC_ADDR		0x20c
-
-#define NB8800_RX_REPORT_ADDR		0x210
-#define RX_BYTES_TRANSFERRED(x)		(((x) >> 16) & 0xFFFF)
-#define RX_MULTICAST_PKT		BIT(9)
-#define RX_BROADCAST_PKT		BIT(8)
-#define RX_LENGTH_ERR			BIT(7)
-#define RX_FCS_ERR			BIT(6)
-#define RX_RUNT_PKT			BIT(5)
-#define RX_FIFO_OVERRUN			BIT(4)
-#define RX_LATE_COLLISION		BIT(3)
-#define RX_ALIGNMENT_ERROR		BIT(2)
-#define RX_ERROR_MASK			0xfc
-#define IS_RX_ERROR(r)			((r) & RX_ERROR_MASK)
-
-#define NB8800_RX_FIFO_SR		0x214
-#define NB8800_RX_ITR			0x218
-
-/* Sigma Designs SMP86xx additional registers */
-#define NB8800_TANGOX_PAD_MODE		0x400
-#define PAD_MODE_MASK			0x7
-#define PAD_MODE_MII			0x0
-#define PAD_MODE_RGMII			0x1
-#define PAD_MODE_GTX_CLK_INV		BIT(3)
-#define PAD_MODE_GTX_CLK_DELAY		BIT(4)
-
-#define NB8800_TANGOX_MDIO_CLKDIV	0x420
-#define NB8800_TANGOX_RESET		0x424
-
-/* Hardware DMA descriptor */
-struct nb8800_dma_desc {
-	u32				s_addr;	/* start address */
-	u32				n_addr;	/* next descriptor address */
-	u32				r_addr;	/* report address */
-	u32				config;
-} __aligned(8);
-
-#define DESC_ID				BIT(23)
-#define DESC_EOC			BIT(22)
-#define DESC_EOF			BIT(21)
-#define DESC_LK				BIT(20)
-#define DESC_DS				BIT(19)
-#define DESC_BTS(x)			(((x) & 0x7) << 16)
-
-/* DMA descriptor and associated data for rx.
- * Allocated from coherent memory.
- */
-struct nb8800_rx_desc {
-	/* DMA descriptor */
-	struct nb8800_dma_desc		desc;
-
-	/* Status report filled in by hardware */
-	u32				report;
-};
-
-/* Address of buffer on rx ring */
-struct nb8800_rx_buf {
-	struct page			*page;
-	unsigned long			offset;
-};
-
-/* DMA descriptors and associated data for tx.
- * Allocated from coherent memory.
- */
-struct nb8800_tx_desc {
-	/* DMA descriptor.  The second descriptor is used if packet
-	 * data is unaligned.
-	 */
-	struct nb8800_dma_desc		desc[2];
-
-	/* Status report filled in by hardware */
-	u32				report;
-
-	/* Bounce buffer for initial unaligned part of packet */
-	u8				buf[8] __aligned(8);
-};
-
-/* Packet in tx queue */
-struct nb8800_tx_buf {
-	/* Currently queued skb */
-	struct sk_buff			*skb;
-
-	/* DMA address of the first descriptor */
-	dma_addr_t			dma_desc;
-
-	/* DMA address of packet data */
-	dma_addr_t			dma_addr;
-
-	/* Length of DMA mapping, less than skb->len if alignment
-	 * buffer is used.
-	 */
-	unsigned int			dma_len;
-
-	/* Number of packets in chain starting here */
-	unsigned int			chain_len;
-
-	/* Packet chain ready to be submitted to hardware */
-	bool				ready;
-};
-
-struct nb8800_priv {
-	struct napi_struct		napi;
-
-	void __iomem			*base;
-
-	/* RX DMA descriptors */
-	struct nb8800_rx_desc		*rx_descs;
-
-	/* RX buffers referenced by DMA descriptors */
-	struct nb8800_rx_buf		*rx_bufs;
-
-	/* Current end of chain */
-	u32				rx_eoc;
-
-	/* Value for rx interrupt time register in NAPI interrupt mode */
-	u32				rx_itr_irq;
-
-	/* Value for rx interrupt time register in NAPI poll mode */
-	u32				rx_itr_poll;
-
-	/* Value for config field of rx DMA descriptors */
-	u32				rx_dma_config;
-
-	/* TX DMA descriptors */
-	struct nb8800_tx_desc		*tx_descs;
-
-	/* TX packet queue */
-	struct nb8800_tx_buf		*tx_bufs;
-
-	/* Number of free tx queue entries */
-	atomic_t			tx_free;
-
-	/* First free tx queue entry */
-	u32				tx_next;
-
-	/* Next buffer to transmit */
-	u32				tx_queue;
-
-	/* Start of current packet chain */
-	struct nb8800_tx_buf		*tx_chain;
-
-	/* Next buffer to reclaim */
-	u32				tx_done;
-
-	/* Lock for DMA activation */
-	spinlock_t			tx_lock;
-
-	struct mii_bus			*mii_bus;
-	struct device_node		*phy_node;
-
-	/* PHY connection type from DT */
-	phy_interface_t			phy_mode;
-
-	/* Current link status */
-	int				speed;
-	int				duplex;
-	int				link;
-
-	/* Pause settings */
-	bool				pause_aneg;
-	bool				pause_rx;
-	bool				pause_tx;
-
-	/* DMA base address of rx descriptors, see rx_descs above */
-	dma_addr_t			rx_desc_dma;
-
-	/* DMA base address of tx descriptors, see tx_descs above */
-	dma_addr_t			tx_desc_dma;
-
-	struct clk			*clk;
-};
-
-struct nb8800_ops {
-	int				(*init)(struct net_device *dev);
-	int				(*reset)(struct net_device *dev);
-};
-
-#endif /* _NB8800_H_ */
-- 
2.29.2