ftgmac100/ftmac100: Move the Faraday drivers

Move the Faraday driver into drivers/net/ethernet/faraday/ and
make the necessary Kconfig and Makefile changes.

CC: "Po-Yu Chuang" <ratbert@faraday-tech.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Acked-by: Po-Yu Chuang <ratbert@faraday-tech.com>

1 files changed, 0 insertions, 1198 deletions

diff --git a/drivers/net/ftmac100.c b/drivers/net/ftmac100.c
deleted file mode 100644
index 9bd7746..0000000
--- a/drivers/net/ftmac100.c
+++ /dev/null
@@ -1,1198 +0,0 @@
-/*
- * Faraday FTMAC100 10/100 Ethernet
- *
- * (C) Copyright 2009-2011 Faraday Technology
- * Po-Yu Chuang <ratbert@faraday-tech.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-#define pr_fmt(fmt)	KBUILD_MODNAME ": " fmt
-
-#include <linux/dma-mapping.h>
-#include <linux/etherdevice.h>
-#include <linux/ethtool.h>
-#include <linux/init.h>
-#include <linux/io.h>
-#include <linux/mii.h>
-#include <linux/module.h>
-#include <linux/netdevice.h>
-#include <linux/platform_device.h>
-
-#include "ftmac100.h"
-
-#define DRV_NAME	"ftmac100"
-#define DRV_VERSION	"0.2"
-
-#define RX_QUEUE_ENTRIES	128	/* must be power of 2 */
-#define TX_QUEUE_ENTRIES	16	/* must be power of 2 */
-
-#define MAX_PKT_SIZE		1518
-#define RX_BUF_SIZE		2044	/* must be smaller than 0x7ff */
-
-#if MAX_PKT_SIZE > 0x7ff
-#error invalid MAX_PKT_SIZE
-#endif
-
-#if RX_BUF_SIZE > 0x7ff || RX_BUF_SIZE > PAGE_SIZE
-#error invalid RX_BUF_SIZE
-#endif
-
-/******************************************************************************
- * private data
- *****************************************************************************/
-struct ftmac100_descs {
-	struct ftmac100_rxdes rxdes[RX_QUEUE_ENTRIES];
-	struct ftmac100_txdes txdes[TX_QUEUE_ENTRIES];
-};
-
-struct ftmac100 {
-	struct resource *res;
-	void __iomem *base;
-	int irq;
-
-	struct ftmac100_descs *descs;
-	dma_addr_t descs_dma_addr;
-
-	unsigned int rx_pointer;
-	unsigned int tx_clean_pointer;
-	unsigned int tx_pointer;
-	unsigned int tx_pending;
-
-	spinlock_t tx_lock;
-
-	struct net_device *netdev;
-	struct device *dev;
-	struct napi_struct napi;
-
-	struct mii_if_info mii;
-};
-
-static int ftmac100_alloc_rx_page(struct ftmac100 *priv,
-				  struct ftmac100_rxdes *rxdes, gfp_t gfp);
-
-/******************************************************************************
- * internal functions (hardware register access)
- *****************************************************************************/
-#define INT_MASK_ALL_ENABLED	(FTMAC100_INT_RPKT_FINISH	| \
-				 FTMAC100_INT_NORXBUF		| \
-				 FTMAC100_INT_XPKT_OK		| \
-				 FTMAC100_INT_XPKT_LOST		| \
-				 FTMAC100_INT_RPKT_LOST		| \
-				 FTMAC100_INT_AHB_ERR		| \
-				 FTMAC100_INT_PHYSTS_CHG)
-
-#define INT_MASK_ALL_DISABLED	0
-
-static void ftmac100_enable_all_int(struct ftmac100 *priv)
-{
-	iowrite32(INT_MASK_ALL_ENABLED, priv->base + FTMAC100_OFFSET_IMR);
-}
-
-static void ftmac100_disable_all_int(struct ftmac100 *priv)
-{
-	iowrite32(INT_MASK_ALL_DISABLED, priv->base + FTMAC100_OFFSET_IMR);
-}
-
-static void ftmac100_set_rx_ring_base(struct ftmac100 *priv, dma_addr_t addr)
-{
-	iowrite32(addr, priv->base + FTMAC100_OFFSET_RXR_BADR);
-}
-
-static void ftmac100_set_tx_ring_base(struct ftmac100 *priv, dma_addr_t addr)
-{
-	iowrite32(addr, priv->base + FTMAC100_OFFSET_TXR_BADR);
-}
-
-static void ftmac100_txdma_start_polling(struct ftmac100 *priv)
-{
-	iowrite32(1, priv->base + FTMAC100_OFFSET_TXPD);
-}
-
-static int ftmac100_reset(struct ftmac100 *priv)
-{
-	struct net_device *netdev = priv->netdev;
-	int i;
-
-	/* NOTE: reset clears all registers */
-	iowrite32(FTMAC100_MACCR_SW_RST, priv->base + FTMAC100_OFFSET_MACCR);
-
-	for (i = 0; i < 5; i++) {
-		unsigned int maccr;
-
-		maccr = ioread32(priv->base + FTMAC100_OFFSET_MACCR);
-		if (!(maccr & FTMAC100_MACCR_SW_RST)) {
-			/*
-			 * FTMAC100_MACCR_SW_RST cleared does not indicate
-			 * that hardware reset completed (what the f*ck).
-			 * We still need to wait for a while.
-			 */
-			udelay(500);
-			return 0;
-		}
-
-		udelay(1000);
-	}
-
-	netdev_err(netdev, "software reset failed\n");
-	return -EIO;
-}
-
-static void ftmac100_set_mac(struct ftmac100 *priv, const unsigned char *mac)
-{
-	unsigned int maddr = mac[0] << 8 | mac[1];
-	unsigned int laddr = mac[2] << 24 | mac[3] << 16 | mac[4] << 8 | mac[5];
-
-	iowrite32(maddr, priv->base + FTMAC100_OFFSET_MAC_MADR);
-	iowrite32(laddr, priv->base + FTMAC100_OFFSET_MAC_LADR);
-}
-
-#define MACCR_ENABLE_ALL	(FTMAC100_MACCR_XMT_EN	| \
-				 FTMAC100_MACCR_RCV_EN	| \
-				 FTMAC100_MACCR_XDMA_EN	| \
-				 FTMAC100_MACCR_RDMA_EN	| \
-				 FTMAC100_MACCR_CRC_APD	| \
-				 FTMAC100_MACCR_FULLDUP	| \
-				 FTMAC100_MACCR_RX_RUNT	| \
-				 FTMAC100_MACCR_RX_BROADPKT)
-
-static int ftmac100_start_hw(struct ftmac100 *priv)
-{
-	struct net_device *netdev = priv->netdev;
-
-	if (ftmac100_reset(priv))
-		return -EIO;
-
-	/* setup ring buffer base registers */
-	ftmac100_set_rx_ring_base(priv,
-				  priv->descs_dma_addr +
-				  offsetof(struct ftmac100_descs, rxdes));
-	ftmac100_set_tx_ring_base(priv,
-				  priv->descs_dma_addr +
-				  offsetof(struct ftmac100_descs, txdes));
-
-	iowrite32(FTMAC100_APTC_RXPOLL_CNT(1), priv->base + FTMAC100_OFFSET_APTC);
-
-	ftmac100_set_mac(priv, netdev->dev_addr);
-
-	iowrite32(MACCR_ENABLE_ALL, priv->base + FTMAC100_OFFSET_MACCR);
-	return 0;
-}
-
-static void ftmac100_stop_hw(struct ftmac100 *priv)
-{
-	iowrite32(0, priv->base + FTMAC100_OFFSET_MACCR);
-}
-
-/******************************************************************************
- * internal functions (receive descriptor)
- *****************************************************************************/
-static bool ftmac100_rxdes_first_segment(struct ftmac100_rxdes *rxdes)
-{
-	return rxdes->rxdes0 & cpu_to_le32(FTMAC100_RXDES0_FRS);
-}
-
-static bool ftmac100_rxdes_last_segment(struct ftmac100_rxdes *rxdes)
-{
-	return rxdes->rxdes0 & cpu_to_le32(FTMAC100_RXDES0_LRS);
-}
-
-static bool ftmac100_rxdes_owned_by_dma(struct ftmac100_rxdes *rxdes)
-{
-	return rxdes->rxdes0 & cpu_to_le32(FTMAC100_RXDES0_RXDMA_OWN);
-}
-
-static void ftmac100_rxdes_set_dma_own(struct ftmac100_rxdes *rxdes)
-{
-	/* clear status bits */
-	rxdes->rxdes0 = cpu_to_le32(FTMAC100_RXDES0_RXDMA_OWN);
-}
-
-static bool ftmac100_rxdes_rx_error(struct ftmac100_rxdes *rxdes)
-{
-	return rxdes->rxdes0 & cpu_to_le32(FTMAC100_RXDES0_RX_ERR);
-}
-
-static bool ftmac100_rxdes_crc_error(struct ftmac100_rxdes *rxdes)
-{
-	return rxdes->rxdes0 & cpu_to_le32(FTMAC100_RXDES0_CRC_ERR);
-}
-
-static bool ftmac100_rxdes_frame_too_long(struct ftmac100_rxdes *rxdes)
-{
-	return rxdes->rxdes0 & cpu_to_le32(FTMAC100_RXDES0_FTL);
-}
-
-static bool ftmac100_rxdes_runt(struct ftmac100_rxdes *rxdes)
-{
-	return rxdes->rxdes0 & cpu_to_le32(FTMAC100_RXDES0_RUNT);
-}
-
-static bool ftmac100_rxdes_odd_nibble(struct ftmac100_rxdes *rxdes)
-{
-	return rxdes->rxdes0 & cpu_to_le32(FTMAC100_RXDES0_RX_ODD_NB);
-}
-
-static unsigned int ftmac100_rxdes_frame_length(struct ftmac100_rxdes *rxdes)
-{
-	return le32_to_cpu(rxdes->rxdes0) & FTMAC100_RXDES0_RFL;
-}
-
-static bool ftmac100_rxdes_multicast(struct ftmac100_rxdes *rxdes)
-{
-	return rxdes->rxdes0 & cpu_to_le32(FTMAC100_RXDES0_MULTICAST);
-}
-
-static void ftmac100_rxdes_set_buffer_size(struct ftmac100_rxdes *rxdes,
-					   unsigned int size)
-{
-	rxdes->rxdes1 &= cpu_to_le32(FTMAC100_RXDES1_EDORR);
-	rxdes->rxdes1 |= cpu_to_le32(FTMAC100_RXDES1_RXBUF_SIZE(size));
-}
-
-static void ftmac100_rxdes_set_end_of_ring(struct ftmac100_rxdes *rxdes)
-{
-	rxdes->rxdes1 |= cpu_to_le32(FTMAC100_RXDES1_EDORR);
-}
-
-static void ftmac100_rxdes_set_dma_addr(struct ftmac100_rxdes *rxdes,
-					dma_addr_t addr)
-{
-	rxdes->rxdes2 = cpu_to_le32(addr);
-}
-
-static dma_addr_t ftmac100_rxdes_get_dma_addr(struct ftmac100_rxdes *rxdes)
-{
-	return le32_to_cpu(rxdes->rxdes2);
-}
-
-/*
- * rxdes3 is not used by hardware. We use it to keep track of page.
- * Since hardware does not touch it, we can skip cpu_to_le32()/le32_to_cpu().
- */
-static void ftmac100_rxdes_set_page(struct ftmac100_rxdes *rxdes, struct page *page)
-{
-	rxdes->rxdes3 = (unsigned int)page;
-}
-
-static struct page *ftmac100_rxdes_get_page(struct ftmac100_rxdes *rxdes)
-{
-	return (struct page *)rxdes->rxdes3;
-}
-
-/******************************************************************************
- * internal functions (receive)
- *****************************************************************************/
-static int ftmac100_next_rx_pointer(int pointer)
-{
-	return (pointer + 1) & (RX_QUEUE_ENTRIES - 1);
-}
-
-static void ftmac100_rx_pointer_advance(struct ftmac100 *priv)
-{
-	priv->rx_pointer = ftmac100_next_rx_pointer(priv->rx_pointer);
-}
-
-static struct ftmac100_rxdes *ftmac100_current_rxdes(struct ftmac100 *priv)
-{
-	return &priv->descs->rxdes[priv->rx_pointer];
-}
-
-static struct ftmac100_rxdes *
-ftmac100_rx_locate_first_segment(struct ftmac100 *priv)
-{
-	struct ftmac100_rxdes *rxdes = ftmac100_current_rxdes(priv);
-
-	while (!ftmac100_rxdes_owned_by_dma(rxdes)) {
-		if (ftmac100_rxdes_first_segment(rxdes))
-			return rxdes;
-
-		ftmac100_rxdes_set_dma_own(rxdes);
-		ftmac100_rx_pointer_advance(priv);
-		rxdes = ftmac100_current_rxdes(priv);
-	}
-
-	return NULL;
-}
-
-static bool ftmac100_rx_packet_error(struct ftmac100 *priv,
-				     struct ftmac100_rxdes *rxdes)
-{
-	struct net_device *netdev = priv->netdev;
-	bool error = false;
-
-	if (unlikely(ftmac100_rxdes_rx_error(rxdes))) {
-		if (net_ratelimit())
-			netdev_info(netdev, "rx err\n");
-
-		netdev->stats.rx_errors++;
-		error = true;
-	}
-
-	if (unlikely(ftmac100_rxdes_crc_error(rxdes))) {
-		if (net_ratelimit())
-			netdev_info(netdev, "rx crc err\n");
-
-		netdev->stats.rx_crc_errors++;
-		error = true;
-	}
-
-	if (unlikely(ftmac100_rxdes_frame_too_long(rxdes))) {
-		if (net_ratelimit())
-			netdev_info(netdev, "rx frame too long\n");
-
-		netdev->stats.rx_length_errors++;
-		error = true;
-	} else if (unlikely(ftmac100_rxdes_runt(rxdes))) {
-		if (net_ratelimit())
-			netdev_info(netdev, "rx runt\n");
-
-		netdev->stats.rx_length_errors++;
-		error = true;
-	} else if (unlikely(ftmac100_rxdes_odd_nibble(rxdes))) {
-		if (net_ratelimit())
-			netdev_info(netdev, "rx odd nibble\n");
-
-		netdev->stats.rx_length_errors++;
-		error = true;
-	}
-
-	return error;
-}
-
-static void ftmac100_rx_drop_packet(struct ftmac100 *priv)
-{
-	struct net_device *netdev = priv->netdev;
-	struct ftmac100_rxdes *rxdes = ftmac100_current_rxdes(priv);
-	bool done = false;
-
-	if (net_ratelimit())
-		netdev_dbg(netdev, "drop packet %p\n", rxdes);
-
-	do {
-		if (ftmac100_rxdes_last_segment(rxdes))
-			done = true;
-
-		ftmac100_rxdes_set_dma_own(rxdes);
-		ftmac100_rx_pointer_advance(priv);
-		rxdes = ftmac100_current_rxdes(priv);
-	} while (!done && !ftmac100_rxdes_owned_by_dma(rxdes));
-
-	netdev->stats.rx_dropped++;
-}
-
-static bool ftmac100_rx_packet(struct ftmac100 *priv, int *processed)
-{
-	struct net_device *netdev = priv->netdev;
-	struct ftmac100_rxdes *rxdes;
-	struct sk_buff *skb;
-	struct page *page;
-	dma_addr_t map;
-	int length;
-
-	rxdes = ftmac100_rx_locate_first_segment(priv);
-	if (!rxdes)
-		return false;
-
-	if (unlikely(ftmac100_rx_packet_error(priv, rxdes))) {
-		ftmac100_rx_drop_packet(priv);
-		return true;
-	}
-
-	/*
-	 * It is impossible to get multi-segment packets
-	 * because we always provide big enough receive buffers.
-	 */
-	if (unlikely(!ftmac100_rxdes_last_segment(rxdes)))
-		BUG();
-
-	/* start processing */
-	skb = netdev_alloc_skb_ip_align(netdev, 128);
-	if (unlikely(!skb)) {
-		if (net_ratelimit())
-			netdev_err(netdev, "rx skb alloc failed\n");
-
-		ftmac100_rx_drop_packet(priv);
-		return true;
-	}
-
-	if (unlikely(ftmac100_rxdes_multicast(rxdes)))
-		netdev->stats.multicast++;
-
-	map = ftmac100_rxdes_get_dma_addr(rxdes);
-	dma_unmap_page(priv->dev, map, RX_BUF_SIZE, DMA_FROM_DEVICE);
-
-	length = ftmac100_rxdes_frame_length(rxdes);
-	page = ftmac100_rxdes_get_page(rxdes);
-	skb_fill_page_desc(skb, 0, page, 0, length);
-	skb->len += length;
-	skb->data_len += length;
-	skb->truesize += length;
-	__pskb_pull_tail(skb, min(length, 64));
-
-	ftmac100_alloc_rx_page(priv, rxdes, GFP_ATOMIC);
-
-	ftmac100_rx_pointer_advance(priv);
-
-	skb->protocol = eth_type_trans(skb, netdev);
-
-	netdev->stats.rx_packets++;
-	netdev->stats.rx_bytes += skb->len;
-
-	/* push packet to protocol stack */
-	netif_receive_skb(skb);
-
-	(*processed)++;
-	return true;
-}
-
-/******************************************************************************
- * internal functions (transmit descriptor)
- *****************************************************************************/
-static void ftmac100_txdes_reset(struct ftmac100_txdes *txdes)
-{
-	/* clear all except end of ring bit */
-	txdes->txdes0 = 0;
-	txdes->txdes1 &= cpu_to_le32(FTMAC100_TXDES1_EDOTR);
-	txdes->txdes2 = 0;
-	txdes->txdes3 = 0;
-}
-
-static bool ftmac100_txdes_owned_by_dma(struct ftmac100_txdes *txdes)
-{
-	return txdes->txdes0 & cpu_to_le32(FTMAC100_TXDES0_TXDMA_OWN);
-}
-
-static void ftmac100_txdes_set_dma_own(struct ftmac100_txdes *txdes)
-{
-	/*
-	 * Make sure dma own bit will not be set before any other
-	 * descriptor fields.
-	 */
-	wmb();
-	txdes->txdes0 |= cpu_to_le32(FTMAC100_TXDES0_TXDMA_OWN);
-}
-
-static bool ftmac100_txdes_excessive_collision(struct ftmac100_txdes *txdes)
-{
-	return txdes->txdes0 & cpu_to_le32(FTMAC100_TXDES0_TXPKT_EXSCOL);
-}
-
-static bool ftmac100_txdes_late_collision(struct ftmac100_txdes *txdes)
-{
-	return txdes->txdes0 & cpu_to_le32(FTMAC100_TXDES0_TXPKT_LATECOL);
-}
-
-static void ftmac100_txdes_set_end_of_ring(struct ftmac100_txdes *txdes)
-{
-	txdes->txdes1 |= cpu_to_le32(FTMAC100_TXDES1_EDOTR);
-}
-
-static void ftmac100_txdes_set_first_segment(struct ftmac100_txdes *txdes)
-{
-	txdes->txdes1 |= cpu_to_le32(FTMAC100_TXDES1_FTS);
-}
-
-static void ftmac100_txdes_set_last_segment(struct ftmac100_txdes *txdes)
-{
-	txdes->txdes1 |= cpu_to_le32(FTMAC100_TXDES1_LTS);
-}
-
-static void ftmac100_txdes_set_txint(struct ftmac100_txdes *txdes)
-{
-	txdes->txdes1 |= cpu_to_le32(FTMAC100_TXDES1_TXIC);
-}
-
-static void ftmac100_txdes_set_buffer_size(struct ftmac100_txdes *txdes,
-					   unsigned int len)
-{
-	txdes->txdes1 |= cpu_to_le32(FTMAC100_TXDES1_TXBUF_SIZE(len));
-}
-
-static void ftmac100_txdes_set_dma_addr(struct ftmac100_txdes *txdes,
-					dma_addr_t addr)
-{
-	txdes->txdes2 = cpu_to_le32(addr);
-}
-
-static dma_addr_t ftmac100_txdes_get_dma_addr(struct ftmac100_txdes *txdes)
-{
-	return le32_to_cpu(txdes->txdes2);
-}
-
-/*
- * txdes3 is not used by hardware. We use it to keep track of socket buffer.
- * Since hardware does not touch it, we can skip cpu_to_le32()/le32_to_cpu().
- */
-static void ftmac100_txdes_set_skb(struct ftmac100_txdes *txdes, struct sk_buff *skb)
-{
-	txdes->txdes3 = (unsigned int)skb;
-}
-
-static struct sk_buff *ftmac100_txdes_get_skb(struct ftmac100_txdes *txdes)
-{
-	return (struct sk_buff *)txdes->txdes3;
-}
-
-/******************************************************************************
- * internal functions (transmit)
- *****************************************************************************/
-static int ftmac100_next_tx_pointer(int pointer)
-{
-	return (pointer + 1) & (TX_QUEUE_ENTRIES - 1);
-}
-
-static void ftmac100_tx_pointer_advance(struct ftmac100 *priv)
-{
-	priv->tx_pointer = ftmac100_next_tx_pointer(priv->tx_pointer);
-}
-
-static void ftmac100_tx_clean_pointer_advance(struct ftmac100 *priv)
-{
-	priv->tx_clean_pointer = ftmac100_next_tx_pointer(priv->tx_clean_pointer);
-}
-
-static struct ftmac100_txdes *ftmac100_current_txdes(struct ftmac100 *priv)
-{
-	return &priv->descs->txdes[priv->tx_pointer];
-}
-
-static struct ftmac100_txdes *ftmac100_current_clean_txdes(struct ftmac100 *priv)
-{
-	return &priv->descs->txdes[priv->tx_clean_pointer];
-}
-
-static bool ftmac100_tx_complete_packet(struct ftmac100 *priv)
-{
-	struct net_device *netdev = priv->netdev;
-	struct ftmac100_txdes *txdes;
-	struct sk_buff *skb;
-	dma_addr_t map;
-
-	if (priv->tx_pending == 0)
-		return false;
-
-	txdes = ftmac100_current_clean_txdes(priv);
-
-	if (ftmac100_txdes_owned_by_dma(txdes))
-		return false;
-
-	skb = ftmac100_txdes_get_skb(txdes);
-	map = ftmac100_txdes_get_dma_addr(txdes);
-
-	if (unlikely(ftmac100_txdes_excessive_collision(txdes) ||
-		     ftmac100_txdes_late_collision(txdes))) {
-		/*
-		 * packet transmitted to ethernet lost due to late collision
-		 * or excessive collision
-		 */
-		netdev->stats.tx_aborted_errors++;
-	} else {
-		netdev->stats.tx_packets++;
-		netdev->stats.tx_bytes += skb->len;
-	}
-
-	dma_unmap_single(priv->dev, map, skb_headlen(skb), DMA_TO_DEVICE);
-	dev_kfree_skb(skb);
-
-	ftmac100_txdes_reset(txdes);
-
-	ftmac100_tx_clean_pointer_advance(priv);
-
-	spin_lock(&priv->tx_lock);
-	priv->tx_pending--;
-	spin_unlock(&priv->tx_lock);
-	netif_wake_queue(netdev);
-
-	return true;
-}
-
-static void ftmac100_tx_complete(struct ftmac100 *priv)
-{
-	while (ftmac100_tx_complete_packet(priv))
-		;
-}
-
-static int ftmac100_xmit(struct ftmac100 *priv, struct sk_buff *skb,
-			 dma_addr_t map)
-{
-	struct net_device *netdev = priv->netdev;
-	struct ftmac100_txdes *txdes;
-	unsigned int len = (skb->len < ETH_ZLEN) ? ETH_ZLEN : skb->len;
-
-	txdes = ftmac100_current_txdes(priv);
-	ftmac100_tx_pointer_advance(priv);
-
-	/* setup TX descriptor */
-	ftmac100_txdes_set_skb(txdes, skb);
-	ftmac100_txdes_set_dma_addr(txdes, map);
-
-	ftmac100_txdes_set_first_segment(txdes);
-	ftmac100_txdes_set_last_segment(txdes);
-	ftmac100_txdes_set_txint(txdes);
-	ftmac100_txdes_set_buffer_size(txdes, len);
-
-	spin_lock(&priv->tx_lock);
-	priv->tx_pending++;
-	if (priv->tx_pending == TX_QUEUE_ENTRIES)
-		netif_stop_queue(netdev);
-
-	/* start transmit */
-	ftmac100_txdes_set_dma_own(txdes);
-	spin_unlock(&priv->tx_lock);
-
-	ftmac100_txdma_start_polling(priv);
-	return NETDEV_TX_OK;
-}
-
-/******************************************************************************
- * internal functions (buffer)
- *****************************************************************************/
-static int ftmac100_alloc_rx_page(struct ftmac100 *priv,
-				  struct ftmac100_rxdes *rxdes, gfp_t gfp)
-{
-	struct net_device *netdev = priv->netdev;
-	struct page *page;
-	dma_addr_t map;
-
-	page = alloc_page(gfp);
-	if (!page) {
-		if (net_ratelimit())
-			netdev_err(netdev, "failed to allocate rx page\n");
-		return -ENOMEM;
-	}
-
-	map = dma_map_page(priv->dev, page, 0, RX_BUF_SIZE, DMA_FROM_DEVICE);
-	if (unlikely(dma_mapping_error(priv->dev, map))) {
-		if (net_ratelimit())
-			netdev_err(netdev, "failed to map rx page\n");
-		__free_page(page);
-		return -ENOMEM;
-	}
-
-	ftmac100_rxdes_set_page(rxdes, page);
-	ftmac100_rxdes_set_dma_addr(rxdes, map);
-	ftmac100_rxdes_set_buffer_size(rxdes, RX_BUF_SIZE);
-	ftmac100_rxdes_set_dma_own(rxdes);
-	return 0;
-}
-
-static void ftmac100_free_buffers(struct ftmac100 *priv)
-{
-	int i;
-
-	for (i = 0; i < RX_QUEUE_ENTRIES; i++) {
-		struct ftmac100_rxdes *rxdes = &priv->descs->rxdes[i];
-		struct page *page = ftmac100_rxdes_get_page(rxdes);
-		dma_addr_t map = ftmac100_rxdes_get_dma_addr(rxdes);
-
-		if (!page)
-			continue;
-
-		dma_unmap_page(priv->dev, map, RX_BUF_SIZE, DMA_FROM_DEVICE);
-		__free_page(page);
-	}
-
-	for (i = 0; i < TX_QUEUE_ENTRIES; i++) {
-		struct ftmac100_txdes *txdes = &priv->descs->txdes[i];
-		struct sk_buff *skb = ftmac100_txdes_get_skb(txdes);
-		dma_addr_t map = ftmac100_txdes_get_dma_addr(txdes);
-
-		if (!skb)
-			continue;
-
-		dma_unmap_single(priv->dev, map, skb_headlen(skb), DMA_TO_DEVICE);
-		dev_kfree_skb(skb);
-	}
-
-	dma_free_coherent(priv->dev, sizeof(struct ftmac100_descs),
-			  priv->descs, priv->descs_dma_addr);
-}
-
-static int ftmac100_alloc_buffers(struct ftmac100 *priv)
-{
-	int i;
-
-	priv->descs = dma_alloc_coherent(priv->dev, sizeof(struct ftmac100_descs),
-					 &priv->descs_dma_addr, GFP_KERNEL);
-	if (!priv->descs)
-		return -ENOMEM;
-
-	memset(priv->descs, 0, sizeof(struct ftmac100_descs));
-
-	/* initialize RX ring */
-	ftmac100_rxdes_set_end_of_ring(&priv->descs->rxdes[RX_QUEUE_ENTRIES - 1]);
-
-	for (i = 0; i < RX_QUEUE_ENTRIES; i++) {
-		struct ftmac100_rxdes *rxdes = &priv->descs->rxdes[i];
-
-		if (ftmac100_alloc_rx_page(priv, rxdes, GFP_KERNEL))
-			goto err;
-	}
-
-	/* initialize TX ring */
-	ftmac100_txdes_set_end_of_ring(&priv->descs->txdes[TX_QUEUE_ENTRIES - 1]);
-	return 0;
-
-err:
-	ftmac100_free_buffers(priv);
-	return -ENOMEM;
-}
-
-/******************************************************************************
- * struct mii_if_info functions
- *****************************************************************************/
-static int ftmac100_mdio_read(struct net_device *netdev, int phy_id, int reg)
-{
-	struct ftmac100 *priv = netdev_priv(netdev);
-	unsigned int phycr;
-	int i;
-
-	phycr = FTMAC100_PHYCR_PHYAD(phy_id) |
-		FTMAC100_PHYCR_REGAD(reg) |
-		FTMAC100_PHYCR_MIIRD;
-
-	iowrite32(phycr, priv->base + FTMAC100_OFFSET_PHYCR);
-
-	for (i = 0; i < 10; i++) {
-		phycr = ioread32(priv->base + FTMAC100_OFFSET_PHYCR);
-
-		if ((phycr & FTMAC100_PHYCR_MIIRD) == 0)
-			return phycr & FTMAC100_PHYCR_MIIRDATA;
-
-		udelay(100);
-	}
-
-	netdev_err(netdev, "mdio read timed out\n");
-	return 0;
-}
-
-static void ftmac100_mdio_write(struct net_device *netdev, int phy_id, int reg,
-				int data)
-{
-	struct ftmac100 *priv = netdev_priv(netdev);
-	unsigned int phycr;
-	int i;
-
-	phycr = FTMAC100_PHYCR_PHYAD(phy_id) |
-		FTMAC100_PHYCR_REGAD(reg) |
-		FTMAC100_PHYCR_MIIWR;
-
-	data = FTMAC100_PHYWDATA_MIIWDATA(data);
-
-	iowrite32(data, priv->base + FTMAC100_OFFSET_PHYWDATA);
-	iowrite32(phycr, priv->base + FTMAC100_OFFSET_PHYCR);
-
-	for (i = 0; i < 10; i++) {
-		phycr = ioread32(priv->base + FTMAC100_OFFSET_PHYCR);
-
-		if ((phycr & FTMAC100_PHYCR_MIIWR) == 0)
-			return;
-
-		udelay(100);
-	}
-
-	netdev_err(netdev, "mdio write timed out\n");
-}
-
-/******************************************************************************
- * struct ethtool_ops functions
- *****************************************************************************/
-static void ftmac100_get_drvinfo(struct net_device *netdev,
-				 struct ethtool_drvinfo *info)
-{
-	strcpy(info->driver, DRV_NAME);
-	strcpy(info->version, DRV_VERSION);
-	strcpy(info->bus_info, dev_name(&netdev->dev));
-}
-
-static int ftmac100_get_settings(struct net_device *netdev, struct ethtool_cmd *cmd)
-{
-	struct ftmac100 *priv = netdev_priv(netdev);
-	return mii_ethtool_gset(&priv->mii, cmd);
-}
-
-static int ftmac100_set_settings(struct net_device *netdev, struct ethtool_cmd *cmd)
-{
-	struct ftmac100 *priv = netdev_priv(netdev);
-	return mii_ethtool_sset(&priv->mii, cmd);
-}
-
-static int ftmac100_nway_reset(struct net_device *netdev)
-{
-	struct ftmac100 *priv = netdev_priv(netdev);
-	return mii_nway_restart(&priv->mii);
-}
-
-static u32 ftmac100_get_link(struct net_device *netdev)
-{
-	struct ftmac100 *priv = netdev_priv(netdev);
-	return mii_link_ok(&priv->mii);
-}
-
-static const struct ethtool_ops ftmac100_ethtool_ops = {
-	.set_settings		= ftmac100_set_settings,
-	.get_settings		= ftmac100_get_settings,
-	.get_drvinfo		= ftmac100_get_drvinfo,
-	.nway_reset		= ftmac100_nway_reset,
-	.get_link		= ftmac100_get_link,
-};
-
-/******************************************************************************
- * interrupt handler
- *****************************************************************************/
-static irqreturn_t ftmac100_interrupt(int irq, void *dev_id)
-{
-	struct net_device *netdev = dev_id;
-	struct ftmac100 *priv = netdev_priv(netdev);
-
-	if (likely(netif_running(netdev))) {
-		/* Disable interrupts for polling */
-		ftmac100_disable_all_int(priv);
-		napi_schedule(&priv->napi);
-	}
-
-	return IRQ_HANDLED;
-}
-
-/******************************************************************************
- * struct napi_struct functions
- *****************************************************************************/
-static int ftmac100_poll(struct napi_struct *napi, int budget)
-{
-	struct ftmac100 *priv = container_of(napi, struct ftmac100, napi);
-	struct net_device *netdev = priv->netdev;
-	unsigned int status;
-	bool completed = true;
-	int rx = 0;
-
-	status = ioread32(priv->base + FTMAC100_OFFSET_ISR);
-
-	if (status & (FTMAC100_INT_RPKT_FINISH | FTMAC100_INT_NORXBUF)) {
-		/*
-		 * FTMAC100_INT_RPKT_FINISH:
-		 *	RX DMA has received packets into RX buffer successfully
-		 *
-		 * FTMAC100_INT_NORXBUF:
-		 *	RX buffer unavailable
-		 */
-		bool retry;
-
-		do {
-			retry = ftmac100_rx_packet(priv, &rx);
-		} while (retry && rx < budget);
-
-		if (retry && rx == budget)
-			completed = false;
-	}
-
-	if (status & (FTMAC100_INT_XPKT_OK | FTMAC100_INT_XPKT_LOST)) {
-		/*
-		 * FTMAC100_INT_XPKT_OK:
-		 *	packet transmitted to ethernet successfully
-		 *
-		 * FTMAC100_INT_XPKT_LOST:
-		 *	packet transmitted to ethernet lost due to late
-		 *	collision or excessive collision
-		 */
-		ftmac100_tx_complete(priv);
-	}
-
-	if (status & (FTMAC100_INT_NORXBUF | FTMAC100_INT_RPKT_LOST |
-		      FTMAC100_INT_AHB_ERR | FTMAC100_INT_PHYSTS_CHG)) {
-		if (net_ratelimit())
-			netdev_info(netdev, "[ISR] = 0x%x: %s%s%s%s\n", status,
-				    status & FTMAC100_INT_NORXBUF ? "NORXBUF " : "",
-				    status & FTMAC100_INT_RPKT_LOST ? "RPKT_LOST " : "",
-				    status & FTMAC100_INT_AHB_ERR ? "AHB_ERR " : "",
-				    status & FTMAC100_INT_PHYSTS_CHG ? "PHYSTS_CHG" : "");
-
-		if (status & FTMAC100_INT_NORXBUF) {
-			/* RX buffer unavailable */
-			netdev->stats.rx_over_errors++;
-		}
-
-		if (status & FTMAC100_INT_RPKT_LOST) {
-			/* received packet lost due to RX FIFO full */
-			netdev->stats.rx_fifo_errors++;
-		}
-
-		if (status & FTMAC100_INT_PHYSTS_CHG) {
-			/* PHY link status change */
-			mii_check_link(&priv->mii);
-		}
-	}
-
-	if (completed) {
-		/* stop polling */
-		napi_complete(napi);
-		ftmac100_enable_all_int(priv);
-	}
-
-	return rx;
-}
-
-/******************************************************************************
- * struct net_device_ops functions
- *****************************************************************************/
-static int ftmac100_open(struct net_device *netdev)
-{
-	struct ftmac100 *priv = netdev_priv(netdev);
-	int err;
-
-	err = ftmac100_alloc_buffers(priv);
-	if (err) {
-		netdev_err(netdev, "failed to allocate buffers\n");
-		goto err_alloc;
-	}
-
-	err = request_irq(priv->irq, ftmac100_interrupt, 0, netdev->name, netdev);
-	if (err) {
-		netdev_err(netdev, "failed to request irq %d\n", priv->irq);
-		goto err_irq;
-	}
-
-	priv->rx_pointer = 0;
-	priv->tx_clean_pointer = 0;
-	priv->tx_pointer = 0;
-	priv->tx_pending = 0;
-
-	err = ftmac100_start_hw(priv);
-	if (err)
-		goto err_hw;
-
-	napi_enable(&priv->napi);
-	netif_start_queue(netdev);
-
-	ftmac100_enable_all_int(priv);
-
-	return 0;
-
-err_hw:
-	free_irq(priv->irq, netdev);
-err_irq:
-	ftmac100_free_buffers(priv);
-err_alloc:
-	return err;
-}
-
-static int ftmac100_stop(struct net_device *netdev)
-{
-	struct ftmac100 *priv = netdev_priv(netdev);
-
-	ftmac100_disable_all_int(priv);
-	netif_stop_queue(netdev);
-	napi_disable(&priv->napi);
-	ftmac100_stop_hw(priv);
-	free_irq(priv->irq, netdev);
-	ftmac100_free_buffers(priv);
-
-	return 0;
-}
-
-static int ftmac100_hard_start_xmit(struct sk_buff *skb, struct net_device *netdev)
-{
-	struct ftmac100 *priv = netdev_priv(netdev);
-	dma_addr_t map;
-
-	if (unlikely(skb->len > MAX_PKT_SIZE)) {
-		if (net_ratelimit())
-			netdev_dbg(netdev, "tx packet too big\n");
-
-		netdev->stats.tx_dropped++;
-		dev_kfree_skb(skb);
-		return NETDEV_TX_OK;
-	}
-
-	map = dma_map_single(priv->dev, skb->data, skb_headlen(skb), DMA_TO_DEVICE);
-	if (unlikely(dma_mapping_error(priv->dev, map))) {
-		/* drop packet */
-		if (net_ratelimit())
-			netdev_err(netdev, "map socket buffer failed\n");
-
-		netdev->stats.tx_dropped++;
-		dev_kfree_skb(skb);
-		return NETDEV_TX_OK;
-	}
-
-	return ftmac100_xmit(priv, skb, map);
-}
-
-/* optional */
-static int ftmac100_do_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
-{
-	struct ftmac100 *priv = netdev_priv(netdev);
-	struct mii_ioctl_data *data = if_mii(ifr);
-
-	return generic_mii_ioctl(&priv->mii, data, cmd, NULL);
-}
-
-static const struct net_device_ops ftmac100_netdev_ops = {
-	.ndo_open		= ftmac100_open,
-	.ndo_stop		= ftmac100_stop,
-	.ndo_start_xmit		= ftmac100_hard_start_xmit,
-	.ndo_set_mac_address	= eth_mac_addr,
-	.ndo_validate_addr	= eth_validate_addr,
-	.ndo_do_ioctl		= ftmac100_do_ioctl,
-};
-
-/******************************************************************************
- * struct platform_driver functions
- *****************************************************************************/
-static int ftmac100_probe(struct platform_device *pdev)
-{
-	struct resource *res;
-	int irq;
-	struct net_device *netdev;
-	struct ftmac100 *priv;
-	int err;
-
-	if (!pdev)
-		return -ENODEV;
-
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!res)
-		return -ENXIO;
-
-	irq = platform_get_irq(pdev, 0);
-	if (irq < 0)
-		return irq;
-
-	/* setup net_device */
-	netdev = alloc_etherdev(sizeof(*priv));
-	if (!netdev) {
-		err = -ENOMEM;
-		goto err_alloc_etherdev;
-	}
-
-	SET_NETDEV_DEV(netdev, &pdev->dev);
-	SET_ETHTOOL_OPS(netdev, &ftmac100_ethtool_ops);
-	netdev->netdev_ops = &ftmac100_netdev_ops;
-
-	platform_set_drvdata(pdev, netdev);
-
-	/* setup private data */
-	priv = netdev_priv(netdev);
-	priv->netdev = netdev;
-	priv->dev = &pdev->dev;
-
-	spin_lock_init(&priv->tx_lock);
-
-	/* initialize NAPI */
-	netif_napi_add(netdev, &priv->napi, ftmac100_poll, 64);
-
-	/* map io memory */
-	priv->res = request_mem_region(res->start, resource_size(res),
-				       dev_name(&pdev->dev));
-	if (!priv->res) {
-		dev_err(&pdev->dev, "Could not reserve memory region\n");
-		err = -ENOMEM;
-		goto err_req_mem;
-	}
-
-	priv->base = ioremap(res->start, resource_size(res));
-	if (!priv->base) {
-		dev_err(&pdev->dev, "Failed to ioremap ethernet registers\n");
-		err = -EIO;
-		goto err_ioremap;
-	}
-
-	priv->irq = irq;
-
-	/* initialize struct mii_if_info */
-	priv->mii.phy_id	= 0;
-	priv->mii.phy_id_mask	= 0x1f;
-	priv->mii.reg_num_mask	= 0x1f;
-	priv->mii.dev		= netdev;
-	priv->mii.mdio_read	= ftmac100_mdio_read;
-	priv->mii.mdio_write	= ftmac100_mdio_write;
-
-	/* register network device */
-	err = register_netdev(netdev);
-	if (err) {
-		dev_err(&pdev->dev, "Failed to register netdev\n");
-		goto err_register_netdev;
-	}
-
-	netdev_info(netdev, "irq %d, mapped at %p\n", priv->irq, priv->base);
-
-	if (!is_valid_ether_addr(netdev->dev_addr)) {
-		random_ether_addr(netdev->dev_addr);
-		netdev_info(netdev, "generated random MAC address %pM\n",
-			    netdev->dev_addr);
-	}
-
-	return 0;
-
-err_register_netdev:
-	iounmap(priv->base);
-err_ioremap:
-	release_resource(priv->res);
-err_req_mem:
-	netif_napi_del(&priv->napi);
-	platform_set_drvdata(pdev, NULL);
-	free_netdev(netdev);
-err_alloc_etherdev:
-	return err;
-}
-
-static int __exit ftmac100_remove(struct platform_device *pdev)
-{
-	struct net_device *netdev;
-	struct ftmac100 *priv;
-
-	netdev = platform_get_drvdata(pdev);
-	priv = netdev_priv(netdev);
-
-	unregister_netdev(netdev);
-
-	iounmap(priv->base);
-	release_resource(priv->res);
-
-	netif_napi_del(&priv->napi);
-	platform_set_drvdata(pdev, NULL);
-	free_netdev(netdev);
-	return 0;
-}
-
-static struct platform_driver ftmac100_driver = {
-	.probe		= ftmac100_probe,
-	.remove		= __exit_p(ftmac100_remove),
-	.driver		= {
-		.name	= DRV_NAME,
-		.owner	= THIS_MODULE,
-	},
-};
-
-/******************************************************************************
- * initialization / finalization
- *****************************************************************************/
-static int __init ftmac100_init(void)
-{
-	pr_info("Loading version " DRV_VERSION " ...\n");
-	return platform_driver_register(&ftmac100_driver);
-}
-
-static void __exit ftmac100_exit(void)
-{
-	platform_driver_unregister(&ftmac100_driver);
-}
-
-module_init(ftmac100_init);
-module_exit(ftmac100_exit);
-
-MODULE_AUTHOR("Po-Yu Chuang <ratbert@faraday-tech.com>");
-MODULE_DESCRIPTION("FTMAC100 driver");
-MODULE_LICENSE("GPL");