korina: Move the IDT driver

Move the IDT driver into drivers/net/ethernet/ and make the
necessary Kconfig and Makefile changes

CC: "IDT Inc." <rischelp@idt.com>
CC: Felix Fietkau <nbd@openwrt.org>
CC: Florian Fainelli <florian@openwrt.org>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

1 files changed, 0 insertions, 1251 deletions

diff --git a/drivers/net/korina.c b/drivers/net/korina.c
deleted file mode 100644
index 763844c587fd..000000000000
--- a/drivers/net/korina.c
+++ /dev/null
@@ -1,1251 +0,0 @@
-/*
- *  Driver for the IDT RC32434 (Korina) on-chip ethernet controller.
- *
- *  Copyright 2004 IDT Inc. (rischelp@idt.com)
- *  Copyright 2006 Felix Fietkau <nbd@openwrt.org>
- *  Copyright 2008 Florian Fainelli <florian@openwrt.org>
- *
- *  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  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
- *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
- *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
- *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
- *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
- *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
- *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
- *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- *  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.
- *
- *  Writing to a DMA status register:
- *
- *  When writing to the status register, you should mask the bit you have
- *  been testing the status register with. Both Tx and Rx DMA registers
- *  should stick to this procedure.
- */
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/moduleparam.h>
-#include <linux/sched.h>
-#include <linux/ctype.h>
-#include <linux/types.h>
-#include <linux/interrupt.h>
-#include <linux/init.h>
-#include <linux/ioport.h>
-#include <linux/in.h>
-#include <linux/slab.h>
-#include <linux/string.h>
-#include <linux/delay.h>
-#include <linux/netdevice.h>
-#include <linux/etherdevice.h>
-#include <linux/skbuff.h>
-#include <linux/errno.h>
-#include <linux/platform_device.h>
-#include <linux/mii.h>
-#include <linux/ethtool.h>
-#include <linux/crc32.h>
-
-#include <asm/bootinfo.h>
-#include <asm/system.h>
-#include <asm/bitops.h>
-#include <asm/pgtable.h>
-#include <asm/segment.h>
-#include <asm/io.h>
-#include <asm/dma.h>
-
-#include <asm/mach-rc32434/rb.h>
-#include <asm/mach-rc32434/rc32434.h>
-#include <asm/mach-rc32434/eth.h>
-#include <asm/mach-rc32434/dma_v.h>
-
-#define DRV_NAME        "korina"
-#define DRV_VERSION     "0.10"
-#define DRV_RELDATE     "04Mar2008"
-
-#define STATION_ADDRESS_HIGH(dev) (((dev)->dev_addr[0] << 8) | \
-				   ((dev)->dev_addr[1]))
-#define STATION_ADDRESS_LOW(dev)  (((dev)->dev_addr[2] << 24) | \
-				   ((dev)->dev_addr[3] << 16) | \
-				   ((dev)->dev_addr[4] << 8)  | \
-				   ((dev)->dev_addr[5]))
-
-#define MII_CLOCK 1250000 	/* no more than 2.5MHz */
-
-/* the following must be powers of two */
-#define KORINA_NUM_RDS	64  /* number of receive descriptors */
-#define KORINA_NUM_TDS	64  /* number of transmit descriptors */
-
-/* KORINA_RBSIZE is the hardware's default maximum receive
- * frame size in bytes. Having this hardcoded means that there
- * is no support for MTU sizes greater than 1500. */
-#define KORINA_RBSIZE	1536 /* size of one resource buffer = Ether MTU */
-#define KORINA_RDS_MASK	(KORINA_NUM_RDS - 1)
-#define KORINA_TDS_MASK	(KORINA_NUM_TDS - 1)
-#define RD_RING_SIZE 	(KORINA_NUM_RDS * sizeof(struct dma_desc))
-#define TD_RING_SIZE	(KORINA_NUM_TDS * sizeof(struct dma_desc))
-
-#define TX_TIMEOUT 	(6000 * HZ / 1000)
-
-enum chain_status { desc_filled, desc_empty };
-#define IS_DMA_FINISHED(X)   (((X) & (DMA_DESC_FINI)) != 0)
-#define IS_DMA_DONE(X)   (((X) & (DMA_DESC_DONE)) != 0)
-#define RCVPKT_LENGTH(X)     (((X) & ETH_RX_LEN) >> ETH_RX_LEN_BIT)
-
-/* Information that need to be kept for each board. */
-struct korina_private {
-	struct eth_regs *eth_regs;
-	struct dma_reg *rx_dma_regs;
-	struct dma_reg *tx_dma_regs;
-	struct dma_desc *td_ring; /* transmit descriptor ring */
-	struct dma_desc *rd_ring; /* receive descriptor ring  */
-
-	struct sk_buff *tx_skb[KORINA_NUM_TDS];
-	struct sk_buff *rx_skb[KORINA_NUM_RDS];
-
-	int rx_next_done;
-	int rx_chain_head;
-	int rx_chain_tail;
-	enum chain_status rx_chain_status;
-
-	int tx_next_done;
-	int tx_chain_head;
-	int tx_chain_tail;
-	enum chain_status tx_chain_status;
-	int tx_count;
-	int tx_full;
-
-	int rx_irq;
-	int tx_irq;
-	int ovr_irq;
-	int und_irq;
-
-	spinlock_t lock;        /* NIC xmit lock */
-
-	int dma_halt_cnt;
-	int dma_run_cnt;
-	struct napi_struct napi;
-	struct timer_list media_check_timer;
-	struct mii_if_info mii_if;
-	struct work_struct restart_task;
-	struct net_device *dev;
-	int phy_addr;
-};
-
-extern unsigned int idt_cpu_freq;
-
-static inline void korina_start_dma(struct dma_reg *ch, u32 dma_addr)
-{
-	writel(0, &ch->dmandptr);
-	writel(dma_addr, &ch->dmadptr);
-}
-
-static inline void korina_abort_dma(struct net_device *dev,
-					struct dma_reg *ch)
-{
-       if (readl(&ch->dmac) & DMA_CHAN_RUN_BIT) {
-	       writel(0x10, &ch->dmac);
-
-	       while (!(readl(&ch->dmas) & DMA_STAT_HALT))
-		       dev->trans_start = jiffies;
-
-	       writel(0, &ch->dmas);
-       }
-
-       writel(0, &ch->dmadptr);
-       writel(0, &ch->dmandptr);
-}
-
-static inline void korina_chain_dma(struct dma_reg *ch, u32 dma_addr)
-{
-	writel(dma_addr, &ch->dmandptr);
-}
-
-static void korina_abort_tx(struct net_device *dev)
-{
-	struct korina_private *lp = netdev_priv(dev);
-
-	korina_abort_dma(dev, lp->tx_dma_regs);
-}
-
-static void korina_abort_rx(struct net_device *dev)
-{
-	struct korina_private *lp = netdev_priv(dev);
-
-	korina_abort_dma(dev, lp->rx_dma_regs);
-}
-
-static void korina_start_rx(struct korina_private *lp,
-					struct dma_desc *rd)
-{
-	korina_start_dma(lp->rx_dma_regs, CPHYSADDR(rd));
-}
-
-static void korina_chain_rx(struct korina_private *lp,
-					struct dma_desc *rd)
-{
-	korina_chain_dma(lp->rx_dma_regs, CPHYSADDR(rd));
-}
-
-/* transmit packet */
-static int korina_send_packet(struct sk_buff *skb, struct net_device *dev)
-{
-	struct korina_private *lp = netdev_priv(dev);
-	unsigned long flags;
-	u32 length;
-	u32 chain_prev, chain_next;
-	struct dma_desc *td;
-
-	spin_lock_irqsave(&lp->lock, flags);
-
-	td = &lp->td_ring[lp->tx_chain_tail];
-
-	/* stop queue when full, drop pkts if queue already full */
-	if (lp->tx_count >= (KORINA_NUM_TDS - 2)) {
-		lp->tx_full = 1;
-
-		if (lp->tx_count == (KORINA_NUM_TDS - 2))
-			netif_stop_queue(dev);
-		else {
-			dev->stats.tx_dropped++;
-			dev_kfree_skb_any(skb);
-			spin_unlock_irqrestore(&lp->lock, flags);
-
-			return NETDEV_TX_BUSY;
-		}
-	}
-
-	lp->tx_count++;
-
-	lp->tx_skb[lp->tx_chain_tail] = skb;
-
-	length = skb->len;
-	dma_cache_wback((u32)skb->data, skb->len);
-
-	/* Setup the transmit descriptor. */
-	dma_cache_inv((u32) td, sizeof(*td));
-	td->ca = CPHYSADDR(skb->data);
-	chain_prev = (lp->tx_chain_tail - 1) & KORINA_TDS_MASK;
-	chain_next = (lp->tx_chain_tail + 1) & KORINA_TDS_MASK;
-
-	if (readl(&(lp->tx_dma_regs->dmandptr)) == 0) {
-		if (lp->tx_chain_status == desc_empty) {
-			/* Update tail */
-			td->control = DMA_COUNT(length) |
-					DMA_DESC_COF | DMA_DESC_IOF;
-			/* Move tail */
-			lp->tx_chain_tail = chain_next;
-			/* Write to NDPTR */
-			writel(CPHYSADDR(&lp->td_ring[lp->tx_chain_head]),
-					&lp->tx_dma_regs->dmandptr);
-			/* Move head to tail */
-			lp->tx_chain_head = lp->tx_chain_tail;
-		} else {
-			/* Update tail */
-			td->control = DMA_COUNT(length) |
-					DMA_DESC_COF | DMA_DESC_IOF;
-			/* Link to prev */
-			lp->td_ring[chain_prev].control &=
-					~DMA_DESC_COF;
-			/* Link to prev */
-			lp->td_ring[chain_prev].link =  CPHYSADDR(td);
-			/* Move tail */
-			lp->tx_chain_tail = chain_next;
-			/* Write to NDPTR */
-			writel(CPHYSADDR(&lp->td_ring[lp->tx_chain_head]),
-					&(lp->tx_dma_regs->dmandptr));
-			/* Move head to tail */
-			lp->tx_chain_head = lp->tx_chain_tail;
-			lp->tx_chain_status = desc_empty;
-		}
-	} else {
-		if (lp->tx_chain_status == desc_empty) {
-			/* Update tail */
-			td->control = DMA_COUNT(length) |
-					DMA_DESC_COF | DMA_DESC_IOF;
-			/* Move tail */
-			lp->tx_chain_tail = chain_next;
-			lp->tx_chain_status = desc_filled;
-		} else {
-			/* Update tail */
-			td->control = DMA_COUNT(length) |
-					DMA_DESC_COF | DMA_DESC_IOF;
-			lp->td_ring[chain_prev].control &=
-					~DMA_DESC_COF;
-			lp->td_ring[chain_prev].link =  CPHYSADDR(td);
-			lp->tx_chain_tail = chain_next;
-		}
-	}
-	dma_cache_wback((u32) td, sizeof(*td));
-
-	dev->trans_start = jiffies;
-	spin_unlock_irqrestore(&lp->lock, flags);
-
-	return NETDEV_TX_OK;
-}
-
-static int mdio_read(struct net_device *dev, int mii_id, int reg)
-{
-	struct korina_private *lp = netdev_priv(dev);
-	int ret;
-
-	mii_id = ((lp->rx_irq == 0x2c ? 1 : 0) << 8);
-
-	writel(0, &lp->eth_regs->miimcfg);
-	writel(0, &lp->eth_regs->miimcmd);
-	writel(mii_id | reg, &lp->eth_regs->miimaddr);
-	writel(ETH_MII_CMD_SCN, &lp->eth_regs->miimcmd);
-
-	ret = (int)(readl(&lp->eth_regs->miimrdd));
-	return ret;
-}
-
-static void mdio_write(struct net_device *dev, int mii_id, int reg, int val)
-{
-	struct korina_private *lp = netdev_priv(dev);
-
-	mii_id = ((lp->rx_irq == 0x2c ? 1 : 0) << 8);
-
-	writel(0, &lp->eth_regs->miimcfg);
-	writel(1, &lp->eth_regs->miimcmd);
-	writel(mii_id | reg, &lp->eth_regs->miimaddr);
-	writel(ETH_MII_CMD_SCN, &lp->eth_regs->miimcmd);
-	writel(val, &lp->eth_regs->miimwtd);
-}
-
-/* Ethernet Rx DMA interrupt */
-static irqreturn_t korina_rx_dma_interrupt(int irq, void *dev_id)
-{
-	struct net_device *dev = dev_id;
-	struct korina_private *lp = netdev_priv(dev);
-	u32 dmas, dmasm;
-	irqreturn_t retval;
-
-	dmas = readl(&lp->rx_dma_regs->dmas);
-	if (dmas & (DMA_STAT_DONE | DMA_STAT_HALT | DMA_STAT_ERR)) {
-		dmasm = readl(&lp->rx_dma_regs->dmasm);
-		writel(dmasm | (DMA_STAT_DONE |
-				DMA_STAT_HALT | DMA_STAT_ERR),
-				&lp->rx_dma_regs->dmasm);
-
-		napi_schedule(&lp->napi);
-
-		if (dmas & DMA_STAT_ERR)
-			printk(KERN_ERR "%s: DMA error\n", dev->name);
-
-		retval = IRQ_HANDLED;
-	} else
-		retval = IRQ_NONE;
-
-	return retval;
-}
-
-static int korina_rx(struct net_device *dev, int limit)
-{
-	struct korina_private *lp = netdev_priv(dev);
-	struct dma_desc *rd = &lp->rd_ring[lp->rx_next_done];
-	struct sk_buff *skb, *skb_new;
-	u8 *pkt_buf;
-	u32 devcs, pkt_len, dmas;
-	int count;
-
-	dma_cache_inv((u32)rd, sizeof(*rd));
-
-	for (count = 0; count < limit; count++) {
-		skb = lp->rx_skb[lp->rx_next_done];
-		skb_new = NULL;
-
-		devcs = rd->devcs;
-
-		if ((KORINA_RBSIZE - (u32)DMA_COUNT(rd->control)) == 0)
-			break;
-
-		/* Update statistics counters */
-		if (devcs & ETH_RX_CRC)
-			dev->stats.rx_crc_errors++;
-		if (devcs & ETH_RX_LOR)
-			dev->stats.rx_length_errors++;
-		if (devcs & ETH_RX_LE)
-			dev->stats.rx_length_errors++;
-		if (devcs & ETH_RX_OVR)
-			dev->stats.rx_fifo_errors++;
-		if (devcs & ETH_RX_CV)
-			dev->stats.rx_frame_errors++;
-		if (devcs & ETH_RX_CES)
-			dev->stats.rx_length_errors++;
-		if (devcs & ETH_RX_MP)
-			dev->stats.multicast++;
-
-		if ((devcs & ETH_RX_LD) != ETH_RX_LD) {
-			/* check that this is a whole packet
-			 * WARNING: DMA_FD bit incorrectly set
-			 * in Rc32434 (errata ref #077) */
-			dev->stats.rx_errors++;
-			dev->stats.rx_dropped++;
-		} else if ((devcs & ETH_RX_ROK)) {
-			pkt_len = RCVPKT_LENGTH(devcs);
-
-			/* must be the (first and) last
-			 * descriptor then */
-			pkt_buf = (u8 *)lp->rx_skb[lp->rx_next_done]->data;
-
-			/* invalidate the cache */
-			dma_cache_inv((unsigned long)pkt_buf, pkt_len - 4);
-
-			/* Malloc up new buffer. */
-			skb_new = netdev_alloc_skb_ip_align(dev, KORINA_RBSIZE);
-
-			if (!skb_new)
-				break;
-			/* Do not count the CRC */
-			skb_put(skb, pkt_len - 4);
-			skb->protocol = eth_type_trans(skb, dev);
-
-			/* Pass the packet to upper layers */
-			netif_receive_skb(skb);
-			dev->stats.rx_packets++;
-			dev->stats.rx_bytes += pkt_len;
-
-			/* Update the mcast stats */
-			if (devcs & ETH_RX_MP)
-				dev->stats.multicast++;
-
-			lp->rx_skb[lp->rx_next_done] = skb_new;
-		}
-
-		rd->devcs = 0;
-
-		/* Restore descriptor's curr_addr */
-		if (skb_new)
-			rd->ca = CPHYSADDR(skb_new->data);
-		else
-			rd->ca = CPHYSADDR(skb->data);
-
-		rd->control = DMA_COUNT(KORINA_RBSIZE) |
-			DMA_DESC_COD | DMA_DESC_IOD;
-		lp->rd_ring[(lp->rx_next_done - 1) &
-			KORINA_RDS_MASK].control &=
-			~DMA_DESC_COD;
-
-		lp->rx_next_done = (lp->rx_next_done + 1) & KORINA_RDS_MASK;
-		dma_cache_wback((u32)rd, sizeof(*rd));
-		rd = &lp->rd_ring[lp->rx_next_done];
-		writel(~DMA_STAT_DONE, &lp->rx_dma_regs->dmas);
-	}
-
-	dmas = readl(&lp->rx_dma_regs->dmas);
-
-	if (dmas & DMA_STAT_HALT) {
-		writel(~(DMA_STAT_HALT | DMA_STAT_ERR),
-				&lp->rx_dma_regs->dmas);
-
-		lp->dma_halt_cnt++;
-		rd->devcs = 0;
-		skb = lp->rx_skb[lp->rx_next_done];
-		rd->ca = CPHYSADDR(skb->data);
-		dma_cache_wback((u32)rd, sizeof(*rd));
-		korina_chain_rx(lp, rd);
-	}
-
-	return count;
-}
-
-static int korina_poll(struct napi_struct *napi, int budget)
-{
-	struct korina_private *lp =
-		container_of(napi, struct korina_private, napi);
-	struct net_device *dev = lp->dev;
-	int work_done;
-
-	work_done = korina_rx(dev, budget);
-	if (work_done < budget) {
-		napi_complete(napi);
-
-		writel(readl(&lp->rx_dma_regs->dmasm) &
-			~(DMA_STAT_DONE | DMA_STAT_HALT | DMA_STAT_ERR),
-			&lp->rx_dma_regs->dmasm);
-	}
-	return work_done;
-}
-
-/*
- * Set or clear the multicast filter for this adaptor.
- */
-static void korina_multicast_list(struct net_device *dev)
-{
-	struct korina_private *lp = netdev_priv(dev);
-	unsigned long flags;
-	struct netdev_hw_addr *ha;
-	u32 recognise = ETH_ARC_AB;	/* always accept broadcasts */
-	int i;
-
-	/* Set promiscuous mode */
-	if (dev->flags & IFF_PROMISC)
-		recognise |= ETH_ARC_PRO;
-
-	else if ((dev->flags & IFF_ALLMULTI) || (netdev_mc_count(dev) > 4))
-		/* All multicast and broadcast */
-		recognise |= ETH_ARC_AM;
-
-	/* Build the hash table */
-	if (netdev_mc_count(dev) > 4) {
-		u16 hash_table[4];
-		u32 crc;
-
-		for (i = 0; i < 4; i++)
-			hash_table[i] = 0;
-
-		netdev_for_each_mc_addr(ha, dev) {
-			crc = ether_crc_le(6, ha->addr);
-			crc >>= 26;
-			hash_table[crc >> 4] |= 1 << (15 - (crc & 0xf));
-		}
-		/* Accept filtered multicast */
-		recognise |= ETH_ARC_AFM;
-
-		/* Fill the MAC hash tables with their values */
-		writel((u32)(hash_table[1] << 16 | hash_table[0]),
-					&lp->eth_regs->ethhash0);
-		writel((u32)(hash_table[3] << 16 | hash_table[2]),
-					&lp->eth_regs->ethhash1);
-	}
-
-	spin_lock_irqsave(&lp->lock, flags);
-	writel(recognise, &lp->eth_regs->etharc);
-	spin_unlock_irqrestore(&lp->lock, flags);
-}
-
-static void korina_tx(struct net_device *dev)
-{
-	struct korina_private *lp = netdev_priv(dev);
-	struct dma_desc *td = &lp->td_ring[lp->tx_next_done];
-	u32 devcs;
-	u32 dmas;
-
-	spin_lock(&lp->lock);
-
-	/* Process all desc that are done */
-	while (IS_DMA_FINISHED(td->control)) {
-		if (lp->tx_full == 1) {
-			netif_wake_queue(dev);
-			lp->tx_full = 0;
-		}
-
-		devcs = lp->td_ring[lp->tx_next_done].devcs;
-		if ((devcs & (ETH_TX_FD | ETH_TX_LD)) !=
-				(ETH_TX_FD | ETH_TX_LD)) {
-			dev->stats.tx_errors++;
-			dev->stats.tx_dropped++;
-
-			/* Should never happen */
-			printk(KERN_ERR "%s: split tx ignored\n",
-							dev->name);
-		} else if (devcs & ETH_TX_TOK) {
-			dev->stats.tx_packets++;
-			dev->stats.tx_bytes +=
-					lp->tx_skb[lp->tx_next_done]->len;
-		} else {
-			dev->stats.tx_errors++;
-			dev->stats.tx_dropped++;
-
-			/* Underflow */
-			if (devcs & ETH_TX_UND)
-				dev->stats.tx_fifo_errors++;
-
-			/* Oversized frame */
-			if (devcs & ETH_TX_OF)
-				dev->stats.tx_aborted_errors++;
-
-			/* Excessive deferrals */
-			if (devcs & ETH_TX_ED)
-				dev->stats.tx_carrier_errors++;
-
-			/* Collisions: medium busy */
-			if (devcs & ETH_TX_EC)
-				dev->stats.collisions++;
-
-			/* Late collision */
-			if (devcs & ETH_TX_LC)
-				dev->stats.tx_window_errors++;
-		}
-
-		/* We must always free the original skb */
-		if (lp->tx_skb[lp->tx_next_done]) {
-			dev_kfree_skb_any(lp->tx_skb[lp->tx_next_done]);
-			lp->tx_skb[lp->tx_next_done] = NULL;
-		}
-
-		lp->td_ring[lp->tx_next_done].control = DMA_DESC_IOF;
-		lp->td_ring[lp->tx_next_done].devcs = ETH_TX_FD | ETH_TX_LD;
-		lp->td_ring[lp->tx_next_done].link = 0;
-		lp->td_ring[lp->tx_next_done].ca = 0;
-		lp->tx_count--;
-
-		/* Go on to next transmission */
-		lp->tx_next_done = (lp->tx_next_done + 1) & KORINA_TDS_MASK;
-		td = &lp->td_ring[lp->tx_next_done];
-
-	}
-
-	/* Clear the DMA status register */
-	dmas = readl(&lp->tx_dma_regs->dmas);
-	writel(~dmas, &lp->tx_dma_regs->dmas);
-
-	writel(readl(&lp->tx_dma_regs->dmasm) &
-			~(DMA_STAT_FINI | DMA_STAT_ERR),
-			&lp->tx_dma_regs->dmasm);
-
-	spin_unlock(&lp->lock);
-}
-
-static irqreturn_t
-korina_tx_dma_interrupt(int irq, void *dev_id)
-{
-	struct net_device *dev = dev_id;
-	struct korina_private *lp = netdev_priv(dev);
-	u32 dmas, dmasm;
-	irqreturn_t retval;
-
-	dmas = readl(&lp->tx_dma_regs->dmas);
-
-	if (dmas & (DMA_STAT_FINI | DMA_STAT_ERR)) {
-		dmasm = readl(&lp->tx_dma_regs->dmasm);
-		writel(dmasm | (DMA_STAT_FINI | DMA_STAT_ERR),
-				&lp->tx_dma_regs->dmasm);
-
-		korina_tx(dev);
-
-		if (lp->tx_chain_status == desc_filled &&
-			(readl(&(lp->tx_dma_regs->dmandptr)) == 0)) {
-			writel(CPHYSADDR(&lp->td_ring[lp->tx_chain_head]),
-				&(lp->tx_dma_regs->dmandptr));
-			lp->tx_chain_status = desc_empty;
-			lp->tx_chain_head = lp->tx_chain_tail;
-			dev->trans_start = jiffies;
-		}
-		if (dmas & DMA_STAT_ERR)
-			printk(KERN_ERR "%s: DMA error\n", dev->name);
-
-		retval = IRQ_HANDLED;
-	} else
-		retval = IRQ_NONE;
-
-	return retval;
-}
-
-
-static void korina_check_media(struct net_device *dev, unsigned int init_media)
-{
-	struct korina_private *lp = netdev_priv(dev);
-
-	mii_check_media(&lp->mii_if, 0, init_media);
-
-	if (lp->mii_if.full_duplex)
-		writel(readl(&lp->eth_regs->ethmac2) | ETH_MAC2_FD,
-						&lp->eth_regs->ethmac2);
-	else
-		writel(readl(&lp->eth_regs->ethmac2) & ~ETH_MAC2_FD,
-						&lp->eth_regs->ethmac2);
-}
-
-static void korina_poll_media(unsigned long data)
-{
-	struct net_device *dev = (struct net_device *) data;
-	struct korina_private *lp = netdev_priv(dev);
-
-	korina_check_media(dev, 0);
-	mod_timer(&lp->media_check_timer, jiffies + HZ);
-}
-
-static void korina_set_carrier(struct mii_if_info *mii)
-{
-	if (mii->force_media) {
-		/* autoneg is off: Link is always assumed to be up */
-		if (!netif_carrier_ok(mii->dev))
-			netif_carrier_on(mii->dev);
-	} else  /* Let MMI library update carrier status */
-		korina_check_media(mii->dev, 0);
-}
-
-static int korina_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
-{
-	struct korina_private *lp = netdev_priv(dev);
-	struct mii_ioctl_data *data = if_mii(rq);
-	int rc;
-
-	if (!netif_running(dev))
-		return -EINVAL;
-	spin_lock_irq(&lp->lock);
-	rc = generic_mii_ioctl(&lp->mii_if, data, cmd, NULL);
-	spin_unlock_irq(&lp->lock);
-	korina_set_carrier(&lp->mii_if);
-
-	return rc;
-}
-
-/* ethtool helpers */
-static void netdev_get_drvinfo(struct net_device *dev,
-			struct ethtool_drvinfo *info)
-{
-	struct korina_private *lp = netdev_priv(dev);
-
-	strcpy(info->driver, DRV_NAME);
-	strcpy(info->version, DRV_VERSION);
-	strcpy(info->bus_info, lp->dev->name);
-}
-
-static int netdev_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
-{
-	struct korina_private *lp = netdev_priv(dev);
-	int rc;
-
-	spin_lock_irq(&lp->lock);
-	rc = mii_ethtool_gset(&lp->mii_if, cmd);
-	spin_unlock_irq(&lp->lock);
-
-	return rc;
-}
-
-static int netdev_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
-{
-	struct korina_private *lp = netdev_priv(dev);
-	int rc;
-
-	spin_lock_irq(&lp->lock);
-	rc = mii_ethtool_sset(&lp->mii_if, cmd);
-	spin_unlock_irq(&lp->lock);
-	korina_set_carrier(&lp->mii_if);
-
-	return rc;
-}
-
-static u32 netdev_get_link(struct net_device *dev)
-{
-	struct korina_private *lp = netdev_priv(dev);
-
-	return mii_link_ok(&lp->mii_if);
-}
-
-static const struct ethtool_ops netdev_ethtool_ops = {
-	.get_drvinfo            = netdev_get_drvinfo,
-	.get_settings           = netdev_get_settings,
-	.set_settings           = netdev_set_settings,
-	.get_link               = netdev_get_link,
-};
-
-static int korina_alloc_ring(struct net_device *dev)
-{
-	struct korina_private *lp = netdev_priv(dev);
-	struct sk_buff *skb;
-	int i;
-
-	/* Initialize the transmit descriptors */
-	for (i = 0; i < KORINA_NUM_TDS; i++) {
-		lp->td_ring[i].control = DMA_DESC_IOF;
-		lp->td_ring[i].devcs = ETH_TX_FD | ETH_TX_LD;
-		lp->td_ring[i].ca = 0;
-		lp->td_ring[i].link = 0;
-	}
-	lp->tx_next_done = lp->tx_chain_head = lp->tx_chain_tail =
-			lp->tx_full = lp->tx_count = 0;
-	lp->tx_chain_status = desc_empty;
-
-	/* Initialize the receive descriptors */
-	for (i = 0; i < KORINA_NUM_RDS; i++) {
-		skb = netdev_alloc_skb_ip_align(dev, KORINA_RBSIZE);
-		if (!skb)
-			return -ENOMEM;
-		lp->rx_skb[i] = skb;
-		lp->rd_ring[i].control = DMA_DESC_IOD |
-				DMA_COUNT(KORINA_RBSIZE);
-		lp->rd_ring[i].devcs = 0;
-		lp->rd_ring[i].ca = CPHYSADDR(skb->data);
-		lp->rd_ring[i].link = CPHYSADDR(&lp->rd_ring[i+1]);
-	}
-
-	/* loop back receive descriptors, so the last
-	 * descriptor points to the first one */
-	lp->rd_ring[i - 1].link = CPHYSADDR(&lp->rd_ring[0]);
-	lp->rd_ring[i - 1].control |= DMA_DESC_COD;
-
-	lp->rx_next_done  = 0;
-	lp->rx_chain_head = 0;
-	lp->rx_chain_tail = 0;
-	lp->rx_chain_status = desc_empty;
-
-	return 0;
-}
-
-static void korina_free_ring(struct net_device *dev)
-{
-	struct korina_private *lp = netdev_priv(dev);
-	int i;
-
-	for (i = 0; i < KORINA_NUM_RDS; i++) {
-		lp->rd_ring[i].control = 0;
-		if (lp->rx_skb[i])
-			dev_kfree_skb_any(lp->rx_skb[i]);
-		lp->rx_skb[i] = NULL;
-	}
-
-	for (i = 0; i < KORINA_NUM_TDS; i++) {
-		lp->td_ring[i].control = 0;
-		if (lp->tx_skb[i])
-			dev_kfree_skb_any(lp->tx_skb[i]);
-		lp->tx_skb[i] = NULL;
-	}
-}
-
-/*
- * Initialize the RC32434 ethernet controller.
- */
-static int korina_init(struct net_device *dev)
-{
-	struct korina_private *lp = netdev_priv(dev);
-
-	/* Disable DMA */
-	korina_abort_tx(dev);
-	korina_abort_rx(dev);
-
-	/* reset ethernet logic */
-	writel(0, &lp->eth_regs->ethintfc);
-	while ((readl(&lp->eth_regs->ethintfc) & ETH_INT_FC_RIP))
-		dev->trans_start = jiffies;
-
-	/* Enable Ethernet Interface */
-	writel(ETH_INT_FC_EN, &lp->eth_regs->ethintfc);
-
-	/* Allocate rings */
-	if (korina_alloc_ring(dev)) {
-		printk(KERN_ERR "%s: descriptor allocation failed\n", dev->name);
-		korina_free_ring(dev);
-		return -ENOMEM;
-	}
-
-	writel(0, &lp->rx_dma_regs->dmas);
-	/* Start Rx DMA */
-	korina_start_rx(lp, &lp->rd_ring[0]);
-
-	writel(readl(&lp->tx_dma_regs->dmasm) &
-			~(DMA_STAT_FINI | DMA_STAT_ERR),
-			&lp->tx_dma_regs->dmasm);
-	writel(readl(&lp->rx_dma_regs->dmasm) &
-			~(DMA_STAT_DONE | DMA_STAT_HALT | DMA_STAT_ERR),
-			&lp->rx_dma_regs->dmasm);
-
-	/* Accept only packets destined for this Ethernet device address */
-	writel(ETH_ARC_AB, &lp->eth_regs->etharc);
-
-	/* Set all Ether station address registers to their initial values */
-	writel(STATION_ADDRESS_LOW(dev), &lp->eth_regs->ethsal0);
-	writel(STATION_ADDRESS_HIGH(dev), &lp->eth_regs->ethsah0);
-
-	writel(STATION_ADDRESS_LOW(dev), &lp->eth_regs->ethsal1);
-	writel(STATION_ADDRESS_HIGH(dev), &lp->eth_regs->ethsah1);
-
-	writel(STATION_ADDRESS_LOW(dev), &lp->eth_regs->ethsal2);
-	writel(STATION_ADDRESS_HIGH(dev), &lp->eth_regs->ethsah2);
-
-	writel(STATION_ADDRESS_LOW(dev), &lp->eth_regs->ethsal3);
-	writel(STATION_ADDRESS_HIGH(dev), &lp->eth_regs->ethsah3);
-
-
-	/* Frame Length Checking, Pad Enable, CRC Enable, Full Duplex set */
-	writel(ETH_MAC2_PE | ETH_MAC2_CEN | ETH_MAC2_FD,
-			&lp->eth_regs->ethmac2);
-
-	/* Back to back inter-packet-gap */
-	writel(0x15, &lp->eth_regs->ethipgt);
-	/* Non - Back to back inter-packet-gap */
-	writel(0x12, &lp->eth_regs->ethipgr);
-
-	/* Management Clock Prescaler Divisor
-	 * Clock independent setting */
-	writel(((idt_cpu_freq) / MII_CLOCK + 1) & ~1,
-		       &lp->eth_regs->ethmcp);
-
-	/* don't transmit until fifo contains 48b */
-	writel(48, &lp->eth_regs->ethfifott);
-
-	writel(ETH_MAC1_RE, &lp->eth_regs->ethmac1);
-
-	napi_enable(&lp->napi);
-	netif_start_queue(dev);
-
-	return 0;
-}
-
-/*
- * Restart the RC32434 ethernet controller.
- */
-static void korina_restart_task(struct work_struct *work)
-{
-	struct korina_private *lp = container_of(work,
-			struct korina_private, restart_task);
-	struct net_device *dev = lp->dev;
-
-	/*
-	 * Disable interrupts
-	 */
-	disable_irq(lp->rx_irq);
-	disable_irq(lp->tx_irq);
-	disable_irq(lp->ovr_irq);
-	disable_irq(lp->und_irq);
-
-	writel(readl(&lp->tx_dma_regs->dmasm) |
-				DMA_STAT_FINI | DMA_STAT_ERR,
-				&lp->tx_dma_regs->dmasm);
-	writel(readl(&lp->rx_dma_regs->dmasm) |
-				DMA_STAT_DONE | DMA_STAT_HALT | DMA_STAT_ERR,
-				&lp->rx_dma_regs->dmasm);
-
-	korina_free_ring(dev);
-
-	napi_disable(&lp->napi);
-
-	if (korina_init(dev) < 0) {
-		printk(KERN_ERR "%s: cannot restart device\n", dev->name);
-		return;
-	}
-	korina_multicast_list(dev);
-
-	enable_irq(lp->und_irq);
-	enable_irq(lp->ovr_irq);
-	enable_irq(lp->tx_irq);
-	enable_irq(lp->rx_irq);
-}
-
-static void korina_clear_and_restart(struct net_device *dev, u32 value)
-{
-	struct korina_private *lp = netdev_priv(dev);
-
-	netif_stop_queue(dev);
-	writel(value, &lp->eth_regs->ethintfc);
-	schedule_work(&lp->restart_task);
-}
-
-/* Ethernet Tx Underflow interrupt */
-static irqreturn_t korina_und_interrupt(int irq, void *dev_id)
-{
-	struct net_device *dev = dev_id;
-	struct korina_private *lp = netdev_priv(dev);
-	unsigned int und;
-
-	spin_lock(&lp->lock);
-
-	und = readl(&lp->eth_regs->ethintfc);
-
-	if (und & ETH_INT_FC_UND)
-		korina_clear_and_restart(dev, und & ~ETH_INT_FC_UND);
-
-	spin_unlock(&lp->lock);
-
-	return IRQ_HANDLED;
-}
-
-static void korina_tx_timeout(struct net_device *dev)
-{
-	struct korina_private *lp = netdev_priv(dev);
-
-	schedule_work(&lp->restart_task);
-}
-
-/* Ethernet Rx Overflow interrupt */
-static irqreturn_t
-korina_ovr_interrupt(int irq, void *dev_id)
-{
-	struct net_device *dev = dev_id;
-	struct korina_private *lp = netdev_priv(dev);
-	unsigned int ovr;
-
-	spin_lock(&lp->lock);
-	ovr = readl(&lp->eth_regs->ethintfc);
-
-	if (ovr & ETH_INT_FC_OVR)
-		korina_clear_and_restart(dev, ovr & ~ETH_INT_FC_OVR);
-
-	spin_unlock(&lp->lock);
-
-	return IRQ_HANDLED;
-}
-
-#ifdef CONFIG_NET_POLL_CONTROLLER
-static void korina_poll_controller(struct net_device *dev)
-{
-	disable_irq(dev->irq);
-	korina_tx_dma_interrupt(dev->irq, dev);
-	enable_irq(dev->irq);
-}
-#endif
-
-static int korina_open(struct net_device *dev)
-{
-	struct korina_private *lp = netdev_priv(dev);
-	int ret;
-
-	/* Initialize */
-	ret = korina_init(dev);
-	if (ret < 0) {
-		printk(KERN_ERR "%s: cannot open device\n", dev->name);
-		goto out;
-	}
-
-	/* Install the interrupt handler
-	 * that handles the Done Finished
-	 * Ovr and Und Events */
-	ret = request_irq(lp->rx_irq, korina_rx_dma_interrupt,
-			IRQF_DISABLED, "Korina ethernet Rx", dev);
-	if (ret < 0) {
-		printk(KERN_ERR "%s: unable to get Rx DMA IRQ %d\n",
-		    dev->name, lp->rx_irq);
-		goto err_release;
-	}
-	ret = request_irq(lp->tx_irq, korina_tx_dma_interrupt,
-			IRQF_DISABLED, "Korina ethernet Tx", dev);
-	if (ret < 0) {
-		printk(KERN_ERR "%s: unable to get Tx DMA IRQ %d\n",
-		    dev->name, lp->tx_irq);
-		goto err_free_rx_irq;
-	}
-
-	/* Install handler for overrun error. */
-	ret = request_irq(lp->ovr_irq, korina_ovr_interrupt,
-			IRQF_DISABLED, "Ethernet Overflow", dev);
-	if (ret < 0) {
-		printk(KERN_ERR "%s: unable to get OVR IRQ %d\n",
-		    dev->name, lp->ovr_irq);
-		goto err_free_tx_irq;
-	}
-
-	/* Install handler for underflow error. */
-	ret = request_irq(lp->und_irq, korina_und_interrupt,
-			IRQF_DISABLED, "Ethernet Underflow", dev);
-	if (ret < 0) {
-		printk(KERN_ERR "%s: unable to get UND IRQ %d\n",
-		    dev->name, lp->und_irq);
-		goto err_free_ovr_irq;
-	}
-	mod_timer(&lp->media_check_timer, jiffies + 1);
-out:
-	return ret;
-
-err_free_ovr_irq:
-	free_irq(lp->ovr_irq, dev);
-err_free_tx_irq:
-	free_irq(lp->tx_irq, dev);
-err_free_rx_irq:
-	free_irq(lp->rx_irq, dev);
-err_release:
-	korina_free_ring(dev);
-	goto out;
-}
-
-static int korina_close(struct net_device *dev)
-{
-	struct korina_private *lp = netdev_priv(dev);
-	u32 tmp;
-
-	del_timer(&lp->media_check_timer);
-
-	/* Disable interrupts */
-	disable_irq(lp->rx_irq);
-	disable_irq(lp->tx_irq);
-	disable_irq(lp->ovr_irq);
-	disable_irq(lp->und_irq);
-
-	korina_abort_tx(dev);
-	tmp = readl(&lp->tx_dma_regs->dmasm);
-	tmp = tmp | DMA_STAT_FINI | DMA_STAT_ERR;
-	writel(tmp, &lp->tx_dma_regs->dmasm);
-
-	korina_abort_rx(dev);
-	tmp = readl(&lp->rx_dma_regs->dmasm);
-	tmp = tmp | DMA_STAT_DONE | DMA_STAT_HALT | DMA_STAT_ERR;
-	writel(tmp, &lp->rx_dma_regs->dmasm);
-
-	korina_free_ring(dev);
-
-	napi_disable(&lp->napi);
-
-	cancel_work_sync(&lp->restart_task);
-
-	free_irq(lp->rx_irq, dev);
-	free_irq(lp->tx_irq, dev);
-	free_irq(lp->ovr_irq, dev);
-	free_irq(lp->und_irq, dev);
-
-	return 0;
-}
-
-static const struct net_device_ops korina_netdev_ops = {
-	.ndo_open		= korina_open,
-	.ndo_stop		= korina_close,
-	.ndo_start_xmit		= korina_send_packet,
-	.ndo_set_multicast_list	= korina_multicast_list,
-	.ndo_tx_timeout		= korina_tx_timeout,
-	.ndo_do_ioctl		= korina_ioctl,
-	.ndo_change_mtu		= eth_change_mtu,
-	.ndo_validate_addr	= eth_validate_addr,
-	.ndo_set_mac_address	= eth_mac_addr,
-#ifdef CONFIG_NET_POLL_CONTROLLER
-	.ndo_poll_controller	= korina_poll_controller,
-#endif
-};
-
-static int korina_probe(struct platform_device *pdev)
-{
-	struct korina_device *bif = platform_get_drvdata(pdev);
-	struct korina_private *lp;
-	struct net_device *dev;
-	struct resource *r;
-	int rc;
-
-	dev = alloc_etherdev(sizeof(struct korina_private));
-	if (!dev) {
-		printk(KERN_ERR DRV_NAME ": alloc_etherdev failed\n");
-		return -ENOMEM;
-	}
-	SET_NETDEV_DEV(dev, &pdev->dev);
-	lp = netdev_priv(dev);
-
-	bif->dev = dev;
-	memcpy(dev->dev_addr, bif->mac, 6);
-
-	lp->rx_irq = platform_get_irq_byname(pdev, "korina_rx");
-	lp->tx_irq = platform_get_irq_byname(pdev, "korina_tx");
-	lp->ovr_irq = platform_get_irq_byname(pdev, "korina_ovr");
-	lp->und_irq = platform_get_irq_byname(pdev, "korina_und");
-
-	r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "korina_regs");
-	dev->base_addr = r->start;
-	lp->eth_regs = ioremap_nocache(r->start, resource_size(r));
-	if (!lp->eth_regs) {
-		printk(KERN_ERR DRV_NAME ": cannot remap registers\n");
-		rc = -ENXIO;
-		goto probe_err_out;
-	}
-
-	r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "korina_dma_rx");
-	lp->rx_dma_regs = ioremap_nocache(r->start, resource_size(r));
-	if (!lp->rx_dma_regs) {
-		printk(KERN_ERR DRV_NAME ": cannot remap Rx DMA registers\n");
-		rc = -ENXIO;
-		goto probe_err_dma_rx;
-	}
-
-	r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "korina_dma_tx");
-	lp->tx_dma_regs = ioremap_nocache(r->start, resource_size(r));
-	if (!lp->tx_dma_regs) {
-		printk(KERN_ERR DRV_NAME ": cannot remap Tx DMA registers\n");
-		rc = -ENXIO;
-		goto probe_err_dma_tx;
-	}
-
-	lp->td_ring = kmalloc(TD_RING_SIZE + RD_RING_SIZE, GFP_KERNEL);
-	if (!lp->td_ring) {
-		printk(KERN_ERR DRV_NAME ": cannot allocate descriptors\n");
-		rc = -ENXIO;
-		goto probe_err_td_ring;
-	}
-
-	dma_cache_inv((unsigned long)(lp->td_ring),
-			TD_RING_SIZE + RD_RING_SIZE);
-
-	/* now convert TD_RING pointer to KSEG1 */
-	lp->td_ring = (struct dma_desc *)KSEG1ADDR(lp->td_ring);
-	lp->rd_ring = &lp->td_ring[KORINA_NUM_TDS];
-
-	spin_lock_init(&lp->lock);
-	/* just use the rx dma irq */
-	dev->irq = lp->rx_irq;
-	lp->dev = dev;
-
-	dev->netdev_ops = &korina_netdev_ops;
-	dev->ethtool_ops = &netdev_ethtool_ops;
-	dev->watchdog_timeo = TX_TIMEOUT;
-	netif_napi_add(dev, &lp->napi, korina_poll, 64);
-
-	lp->phy_addr = (((lp->rx_irq == 0x2c? 1:0) << 8) | 0x05);
-	lp->mii_if.dev = dev;
-	lp->mii_if.mdio_read = mdio_read;
-	lp->mii_if.mdio_write = mdio_write;
-	lp->mii_if.phy_id = lp->phy_addr;
-	lp->mii_if.phy_id_mask = 0x1f;
-	lp->mii_if.reg_num_mask = 0x1f;
-
-	rc = register_netdev(dev);
-	if (rc < 0) {
-		printk(KERN_ERR DRV_NAME
-			": cannot register net device: %d\n", rc);
-		goto probe_err_register;
-	}
-	setup_timer(&lp->media_check_timer, korina_poll_media, (unsigned long) dev);
-
-	INIT_WORK(&lp->restart_task, korina_restart_task);
-
-	printk(KERN_INFO "%s: " DRV_NAME "-" DRV_VERSION " " DRV_RELDATE "\n",
-			dev->name);
-out:
-	return rc;
-
-probe_err_register:
-	kfree(lp->td_ring);
-probe_err_td_ring:
-	iounmap(lp->tx_dma_regs);
-probe_err_dma_tx:
-	iounmap(lp->rx_dma_regs);
-probe_err_dma_rx:
-	iounmap(lp->eth_regs);
-probe_err_out:
-	free_netdev(dev);
-	goto out;
-}
-
-static int korina_remove(struct platform_device *pdev)
-{
-	struct korina_device *bif = platform_get_drvdata(pdev);
-	struct korina_private *lp = netdev_priv(bif->dev);
-
-	iounmap(lp->eth_regs);
-	iounmap(lp->rx_dma_regs);
-	iounmap(lp->tx_dma_regs);
-
-	platform_set_drvdata(pdev, NULL);
-	unregister_netdev(bif->dev);
-	free_netdev(bif->dev);
-
-	return 0;
-}
-
-static struct platform_driver korina_driver = {
-	.driver.name = "korina",
-	.probe = korina_probe,
-	.remove = korina_remove,
-};
-
-static int __init korina_init_module(void)
-{
-	return platform_driver_register(&korina_driver);
-}
-
-static void korina_cleanup_module(void)
-{
-	return platform_driver_unregister(&korina_driver);
-}
-
-module_init(korina_init_module);
-module_exit(korina_cleanup_module);
-
-MODULE_AUTHOR("Philip Rischel <rischelp@idt.com>");
-MODULE_AUTHOR("Felix Fietkau <nbd@openwrt.org>");
-MODULE_AUTHOR("Florian Fainelli <florian@openwrt.org>");
-MODULE_DESCRIPTION("IDT RC32434 (Korina) Ethernet driver");
-MODULE_LICENSE("GPL");