openwrt/target/linux/rb532-2.6/patches/110-korina_ethernet.patch

diff -urN linux.old/drivers/net/Kconfig linux.dev/drivers/net/Kconfig
--- linux.old/drivers/net/Kconfig	2006-12-14 03:13:47.000000000 +0100
+++ linux.dev/drivers/net/Kconfig	2006-12-14 03:18:45.000000000 +0100
@@ -313,6 +313,13 @@
 
 source "drivers/net/arm/Kconfig"
 
+config KORINA
+	tristate "Korina Local Ethernet support"
+	depends on NET_ETHERNET && ( IDT_EB434 || MIKROTIK_RB500)
+	help
+	IDT RC32434 has one local ethernet port. Say Y here to enable it.
+	To compile this driver as a module, choose M here.
+
 config MACE
 	tristate "MACE (Power Mac ethernet) support"
 	depends on NET_ETHERNET && PPC_PMAC && PPC32
diff -urN linux.old/drivers/net/korina.c linux.dev/drivers/net/korina.c
--- linux.old/drivers/net/korina.c	1970-01-01 01:00:00.000000000 +0100
+++ linux.dev/drivers/net/korina.c	2006-12-14 03:18:45.000000000 +0100
@@ -0,0 +1,1160 @@
+/**************************************************************************
+ *
+ *  BRIEF MODULE DESCRIPTION
+ *     Driver for the IDT RC32434 on-chip ethernet controller.
+ *
+ *  Copyright 2004 IDT Inc. (rischelp@idt.com)
+ *  Copyright 2006 Felix Fietkau <nbd@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.
+ *
+ *
+ **************************************************************************
+ * May 2004 rkt, neb
+ *
+ * Based on the driver developed by B. Maruthanayakam, H. Kou and others.
+ *
+ * Aug 2004 Sadik
+ *
+ * Added NAPI
+ *
+ **************************************************************************
+ */
+
+#include <linux/autoconf.h>
+#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/fcntl.h>
+#include <linux/interrupt.h>
+#include <linux/ptrace.h>
+#include <linux/init.h>
+#include <linux/ioport.h>
+#include <linux/proc_fs.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 <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/rc32434/rb.h>
+#include "rc32434_eth.h"
+
+#define DRIVER_VERSION "(mar2904)"
+
+#define DRIVER_NAME "rc32434 Ethernet driver. " DRIVER_VERSION
+
+#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 */
+#define CONFIG_IDT_USE_NAPI 1
+
+
+static inline void rc32434_abort_tx(struct net_device *dev)
+{
+	struct rc32434_local *lp = (struct rc32434_local *)dev->priv;
+	rc32434_abort_dma(dev, lp->tx_dma_regs);
+	
+}
+
+static inline void rc32434_abort_rx(struct net_device *dev)
+{
+	struct rc32434_local *lp = (struct rc32434_local *)dev->priv;
+	rc32434_abort_dma(dev, lp->rx_dma_regs);
+	
+}
+
+static inline void rc32434_start_tx(struct rc32434_local *lp,  volatile DMAD_t td)
+{
+	rc32434_start_dma(lp->tx_dma_regs, CPHYSADDR(td));
+}
+
+static inline void rc32434_start_rx(struct rc32434_local *lp, volatile DMAD_t rd)
+{
+	rc32434_start_dma(lp->rx_dma_regs, CPHYSADDR(rd));
+}
+
+static inline void rc32434_chain_tx(struct rc32434_local *lp, volatile DMAD_t td)
+{
+	rc32434_chain_dma(lp->tx_dma_regs, CPHYSADDR(td));
+}
+
+static inline void rc32434_chain_rx(struct rc32434_local *lp, volatile DMAD_t rd)
+{
+	rc32434_chain_dma(lp->rx_dma_regs, CPHYSADDR(rd));
+}
+
+#ifdef RC32434_PROC_DEBUG
+static int rc32434_read_proc(char *buf, char **start, off_t fpos,
+			     int length, int *eof, void *data)
+{
+	struct net_device *dev = (struct net_device *)data;
+	struct rc32434_local *lp = (struct rc32434_local *)dev->priv;
+	int len = 0;
+	
+	/* print out header */
+	len += sprintf(buf + len, "\n\tKorina Ethernet Debug\n\n");
+	len += sprintf (buf + len,
+			"DMA halt count      = %10d, DMA run count = %10d\n",
+			lp->dma_halt_cnt, lp->dma_run_cnt);
+	
+	if (fpos >= len) {
+		*start = buf;
+		*eof = 1;
+		return 0;
+	}
+	*start = buf + fpos;
+	
+	if ((len -= fpos) > length) 
+		return length;	
+	*eof = 1;
+	
+	return len;
+	
+}
+#endif
+
+
+/*
+ * Restart the RC32434 ethernet controller. 
+ */
+static int rc32434_restart(struct net_device *dev)
+{
+	struct rc32434_local *lp = (struct rc32434_local *)dev->priv;
+	
+	/*
+	 * Disable interrupts
+	 */
+	disable_irq(lp->rx_irq);
+	disable_irq(lp->tx_irq);
+#ifdef	RC32434_REVISION
+	disable_irq(lp->ovr_irq);
+#endif	
+	disable_irq(lp->und_irq);
+	
+	/* Mask F E bit in Tx DMA */
+	__raw_writel(__raw_readl(&lp->tx_dma_regs->dmasm) | DMASM_f_m | DMASM_e_m, &lp->tx_dma_regs->dmasm);
+	/* Mask D H E bit in Rx DMA */
+	__raw_writel(__raw_readl(&lp->rx_dma_regs->dmasm) | DMASM_d_m | DMASM_h_m | DMASM_e_m, &lp->rx_dma_regs->dmasm);
+	
+	rc32434_init(dev);
+	rc32434_multicast_list(dev);
+	
+	enable_irq(lp->und_irq);
+#ifdef	RC32434_REVISION
+	enable_irq(lp->ovr_irq);
+#endif
+	enable_irq(lp->tx_irq);
+	enable_irq(lp->rx_irq);
+	
+	return 0;
+}
+
+static int rc32434_probe(struct platform_device *pdev)
+{
+	struct korina_device *bif = (struct korina_device *) pdev->dev.platform_data;
+	struct rc32434_local *lp = NULL;
+	struct net_device *dev = NULL;
+	struct resource *r;
+	int i, retval,err;
+	
+	dev = alloc_etherdev(sizeof(struct rc32434_local));
+	if(!dev) {
+		ERR("Korina_eth: alloc_etherdev failed\n");
+		return -1;
+	}
+
+	platform_set_drvdata(pdev, dev);
+	SET_MODULE_OWNER(dev);
+	bif->dev = dev;
+	
+	memcpy(dev->dev_addr, bif->mac, 6);
+
+	/* Initialize the device structure. */
+	if (dev->priv == NULL) {
+		lp = (struct rc32434_local *)kmalloc(sizeof(*lp), GFP_KERNEL);
+		memset(lp, 0, sizeof(struct rc32434_local));
+	} 
+	else {
+		lp = (struct rc32434_local *)dev->priv;
+	}
+	
+	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, r->end - r->start);
+	if (!lp->eth_regs) {
+		ERR("Can't remap eth registers\n");
+		retval = -ENXIO;
+		goto probe_err_out;
+	}
+
+	r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "korina_dma_rx");
+	lp->rx_dma_regs = ioremap_nocache(r->start, r->end - r->start);
+	if (!lp->rx_dma_regs) {
+		ERR("Can't remap Rx DMA registers\n");
+		retval = -ENXIO;
+		goto probe_err_out;
+	}
+
+	r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "korina_dma_tx");
+	lp->tx_dma_regs = ioremap_nocache(r->start, r->end - r->start);
+	if (!lp->tx_dma_regs) {
+		ERR("Can't remap Tx DMA registers\n");
+		retval = -ENXIO;
+		goto probe_err_out;
+	}
+	
+#ifdef RC32434_PROC_DEBUG
+	lp->ps = create_proc_read_entry (bif->name, 0, proc_net,
+					 rc32434_read_proc, dev);
+#endif
+	
+	lp->td_ring =	(DMAD_t)kmalloc(TD_RING_SIZE + RD_RING_SIZE, GFP_KERNEL);
+	if (!lp->td_ring) {
+		ERR("Can't allocate descriptors\n");
+		retval = -ENOMEM;
+		goto probe_err_out;
+	}
+	
+	dma_cache_inv((unsigned long)(lp->td_ring), TD_RING_SIZE + RD_RING_SIZE);
+	
+	/* now convert TD_RING pointer to KSEG1 */
+	lp->td_ring = (DMAD_t )KSEG1ADDR(lp->td_ring);
+	lp->rd_ring = &lp->td_ring[RC32434_NUM_TDS];
+	
+	
+	spin_lock_init(&lp->lock);
+	
+	/* just use the rx dma irq */
+	dev->irq = lp->rx_irq;
+	
+	dev->priv = lp;
+	
+	dev->open = rc32434_open;
+	dev->stop = rc32434_close;
+	dev->hard_start_xmit = rc32434_send_packet;
+	dev->get_stats	= rc32434_get_stats;
+	dev->set_multicast_list = &rc32434_multicast_list;
+	dev->tx_timeout = rc32434_tx_timeout;
+	dev->watchdog_timeo = RC32434_TX_TIMEOUT;
+
+#ifdef CONFIG_IDT_USE_NAPI
+	dev->poll = rc32434_poll;
+	dev->weight = 64;
+	printk("Using NAPI with weight %d\n",dev->weight);
+#else
+	lp->rx_tasklet = kmalloc(sizeof(struct tasklet_struct), GFP_KERNEL);
+	tasklet_init(lp->rx_tasklet, rc32434_rx_tasklet, (unsigned long)dev);
+#endif
+	lp->tx_tasklet = kmalloc(sizeof(struct tasklet_struct), GFP_KERNEL);
+	tasklet_init(lp->tx_tasklet, rc32434_tx_tasklet, (unsigned long)dev);
+	
+	if ((err = register_netdev(dev))) {
+		printk(KERN_ERR "rc32434 ethernet. Cannot register net device %d\n", err);
+		free_netdev(dev);
+		retval = -EINVAL;
+		goto probe_err_out;
+	}
+	
+	INFO("Rx IRQ %d, Tx IRQ %d, ", lp->rx_irq, lp->tx_irq);
+	for (i = 0; i < 6; i++) {
+		printk("%2.2x", dev->dev_addr[i]);
+		if (i<5)
+			printk(":");
+	}
+	printk("\n");
+	
+	return 0;
+	
+ probe_err_out:
+	rc32434_cleanup_module();
+	ERR(" failed.  Returns %d\n", retval);
+	return retval;
+	
+}
+
+static int rc32434_remove(struct platform_device *pdev)
+{
+	struct korina_device *bif = (struct korina_device *) pdev->dev.platform_data;
+	
+	if (bif->dev != NULL) {
+		struct rc32434_local *lp = (struct rc32434_local *)bif->dev->priv;
+		if (lp != NULL) {
+			if (lp->eth_regs)
+				iounmap((void*)lp->eth_regs);
+			if (lp->rx_dma_regs)
+				iounmap((void*)lp->rx_dma_regs);
+			if (lp->tx_dma_regs)
+				iounmap((void*)lp->tx_dma_regs);
+			if (lp->td_ring)
+				kfree((void*)KSEG0ADDR(lp->td_ring));
+			
+#ifdef RC32434_PROC_DEBUG
+			if (lp->ps) {
+				remove_proc_entry(bif->name, proc_net);
+			}
+#endif
+			kfree(lp);
+		}
+		
+		platform_set_drvdata(pdev, NULL);
+		unregister_netdev(bif->dev);
+		free_netdev(bif->dev);
+		kfree(bif->dev);
+	}
+	return 0;
+}
+
+
+static int rc32434_open(struct net_device *dev)
+{
+	struct rc32434_local *lp = (struct rc32434_local *)dev->priv;
+	
+	/* Initialize */
+	if (rc32434_init(dev)) {
+		ERR("Error: cannot open the Ethernet device\n");
+		return -EAGAIN;
+	}
+	
+	/* Install the interrupt handler that handles the Done Finished Ovr and Und Events */	
+	if (request_irq(lp->rx_irq, &rc32434_rx_dma_interrupt,
+		  SA_SHIRQ | SA_INTERRUPT,
+			"Korina ethernet Rx", dev)) {
+		ERR(": unable to get Rx DMA IRQ %d\n",
+		    lp->rx_irq);
+		return -EAGAIN;
+	}
+	if (request_irq(lp->tx_irq, &rc32434_tx_dma_interrupt,
+		  SA_SHIRQ | SA_INTERRUPT,
+			"Korina ethernet Tx", dev)) {
+		ERR(": unable to get Tx DMA IRQ %d\n",
+		    lp->tx_irq);
+		free_irq(lp->rx_irq, dev);
+		return -EAGAIN;
+	}
+	
+#ifdef	RC32434_REVISION
+	/* Install handler for overrun error. */
+	if (request_irq(lp->ovr_irq, &rc32434_ovr_interrupt,
+			SA_SHIRQ | SA_INTERRUPT,
+			"Ethernet Overflow", dev)) {
+		ERR(": unable to get OVR IRQ %d\n",
+		    lp->ovr_irq);
+		free_irq(lp->rx_irq, dev);
+		free_irq(lp->tx_irq, dev);
+		return -EAGAIN;
+	}
+#endif
+	
+	/* Install handler for underflow error. */
+	if (request_irq(lp->und_irq, &rc32434_und_interrupt,
+			SA_SHIRQ | SA_INTERRUPT,
+			"Ethernet Underflow", dev)) {
+		ERR(": unable to get UND IRQ %d\n",
+		    lp->und_irq);
+		free_irq(lp->rx_irq, dev);
+		free_irq(lp->tx_irq, dev);
+#ifdef	RC32434_REVISION		
+		free_irq(lp->ovr_irq, dev);		
+#endif
+		return -EAGAIN;
+	}
+	
+	
+	return 0;
+}
+
+
+
+
+static int rc32434_close(struct net_device *dev)
+{
+	struct rc32434_local *lp = (struct rc32434_local *)dev->priv;
+	u32 tmp;
+	
+	/* Disable interrupts */
+	disable_irq(lp->rx_irq);
+	disable_irq(lp->tx_irq);
+#ifdef	RC32434_REVISION
+	disable_irq(lp->ovr_irq);
+#endif
+	disable_irq(lp->und_irq);
+	
+	tmp = __raw_readl(&lp->tx_dma_regs->dmasm);
+	tmp = tmp | DMASM_f_m | DMASM_e_m;
+	__raw_writel(tmp, &lp->tx_dma_regs->dmasm);
+	
+	tmp = __raw_readl(&lp->rx_dma_regs->dmasm);
+	tmp = tmp | DMASM_d_m | DMASM_h_m | DMASM_e_m;
+	__raw_writel(tmp, &lp->rx_dma_regs->dmasm);
+	
+	free_irq(lp->rx_irq, dev);
+	free_irq(lp->tx_irq, dev);
+#ifdef	RC32434_REVISION	
+	free_irq(lp->ovr_irq, dev);
+#endif
+	free_irq(lp->und_irq, dev);
+	return 0;
+}
+
+
+/* transmit packet */
+static int rc32434_send_packet(struct sk_buff *skb, struct net_device *dev)
+{
+	struct rc32434_local		*lp = (struct rc32434_local *)dev->priv;
+	unsigned long 			flags;
+	u32					length;
+	DMAD_t				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 >= (RC32434_NUM_TDS - 2)) {
+		lp->tx_full = 1;
+		
+		if(lp->tx_count == (RC32434_NUM_TDS - 2)) {
+			netif_stop_queue(dev);
+		}
+		else {
+			lp->stats.tx_dropped++;
+			dev_kfree_skb_any(skb);
+			spin_unlock_irqrestore(&lp->lock, flags);
+			return 1;
+		}	   
+	}	 
+	
+	lp->tx_count ++;
+	
+	lp->tx_skb[lp->tx_chain_tail] = skb;
+	
+	length = skb->len;
+	
+	/* Setup the transmit descriptor. */
+	td->ca = CPHYSADDR(skb->data);
+	
+	if(__raw_readl(&(lp->tx_dma_regs->dmandptr)) == 0) {
+		if( lp->tx_chain_status == empty ) {
+			td->control = DMA_COUNT(length) |DMAD_cof_m |DMAD_iof_m;                                /*  Update tail      */
+			lp->tx_chain_tail = (lp->tx_chain_tail + 1) & RC32434_TDS_MASK;                          /*   Move tail       */
+			__raw_writel(CPHYSADDR(&lp->td_ring[lp->tx_chain_head]), &(lp->tx_dma_regs->dmandptr)); /* Write to NDPTR    */
+			lp->tx_chain_head = lp->tx_chain_tail;                                                  /* Move head to tail */
+		}
+		else {
+			td->control = DMA_COUNT(length) |DMAD_cof_m|DMAD_iof_m;                                 /* Update tail */
+			lp->td_ring[(lp->tx_chain_tail-1)& RC32434_TDS_MASK].control &=  ~(DMAD_cof_m);          /* Link to prev */
+			lp->td_ring[(lp->tx_chain_tail-1)& RC32434_TDS_MASK].link =  CPHYSADDR(td);              /* Link to prev */
+			lp->tx_chain_tail = (lp->tx_chain_tail + 1) & RC32434_TDS_MASK;                          /* Move tail */
+			__raw_writel(CPHYSADDR(&lp->td_ring[lp->tx_chain_head]), &(lp->tx_dma_regs->dmandptr)); /* Write to NDPTR */
+			lp->tx_chain_head = lp->tx_chain_tail;                                                  /* Move head to tail */
+			lp->tx_chain_status = empty;
+		}
+	}
+	else {
+		if( lp->tx_chain_status == empty ) {
+			td->control = DMA_COUNT(length) |DMAD_cof_m |DMAD_iof_m;                                /* Update tail */
+			lp->tx_chain_tail = (lp->tx_chain_tail + 1) & RC32434_TDS_MASK;                          /* Move tail */
+			lp->tx_chain_status = filled;
+		}
+		else {
+			td->control = DMA_COUNT(length) |DMAD_cof_m |DMAD_iof_m;                                /* Update tail */
+			lp->td_ring[(lp->tx_chain_tail-1)& RC32434_TDS_MASK].control &=  ~(DMAD_cof_m);          /* Link to prev */
+			lp->td_ring[(lp->tx_chain_tail-1)& RC32434_TDS_MASK].link =  CPHYSADDR(td);              /* Link to prev */
+			lp->tx_chain_tail = (lp->tx_chain_tail + 1) & RC32434_TDS_MASK;                          /* Move tail */
+		}
+	}
+	
+	dev->trans_start = jiffies;				
+	
+	spin_unlock_irqrestore(&lp->lock, flags);
+	
+	return 0;
+}
+
+
+/* Ethernet MII-PHY Handler */
+static void rc32434_mii_handler(unsigned long data)
+{
+	struct net_device *dev = (struct net_device *)data;		
+	struct rc32434_local *lp = (struct rc32434_local *)dev->priv;
+	unsigned long 	flags;
+	unsigned long duplex_status;
+	int port_addr = (lp->rx_irq == 0x2c? 1:0) << 8;
+	
+	spin_lock_irqsave(&lp->lock, flags);
+	
+	/* Two ports are using the same MII, the difference is the PHY address */
+	__raw_writel(0, &rc32434_eth0_regs->miimcfg);  
+	__raw_writel(0, &rc32434_eth0_regs->miimcmd);  
+	__raw_writel(port_addr |0x05, &rc32434_eth0_regs->miimaddr);  
+	__raw_writel(MIIMCMD_scn_m, &rc32434_eth0_regs->miimcmd);  
+	while(__raw_readl(&rc32434_eth0_regs->miimind) & MIIMIND_nv_m);
+	
+	ERR("irq:%x		port_addr:%x	RDD:%x\n", 
+	    lp->rx_irq, port_addr, __raw_readl(&rc32434_eth0_regs->miimrdd));
+	duplex_status = (__raw_readl(&rc32434_eth0_regs->miimrdd) & 0x140)? ETHMAC2_fd_m: 0;
+	if(duplex_status != lp->duplex_mode) {
+		ERR("The MII-PHY is Auto-negotiated to %s-Duplex mode for Eth-%x\n", duplex_status? "Full":"Half", lp->rx_irq == 0x2c? 1:0);		
+		lp->duplex_mode = duplex_status;
+		rc32434_restart(dev);		
+	}
+	
+	lp->mii_phy_timer.expires = jiffies + 10 * HZ;	
+	add_timer(&lp->mii_phy_timer);
+	
+	spin_unlock_irqrestore(&lp->lock, flags);
+	
+}
+
+#ifdef	RC32434_REVISION	
+/* Ethernet Rx Overflow interrupt */
+static irqreturn_t
+rc32434_ovr_interrupt(int irq, void *dev_id)
+{
+	struct net_device *dev = (struct net_device *)dev_id;
+	struct rc32434_local *lp;
+	unsigned int ovr;
+	irqreturn_t retval = IRQ_NONE;
+	
+	ASSERT(dev != NULL);
+	
+	lp = (struct rc32434_local *)dev->priv;
+	spin_lock(&lp->lock);
+	ovr = __raw_readl(&lp->eth_regs->ethintfc);
+	
+	if(ovr & ETHINTFC_ovr_m) {
+		netif_stop_queue(dev);
+		
+		/* clear OVR bit */
+		__raw_writel((ovr & ~ETHINTFC_ovr_m), &lp->eth_regs->ethintfc);
+		
+		/* Restart interface */
+		rc32434_restart(dev);
+		retval = IRQ_HANDLED;
+	}
+	spin_unlock(&lp->lock);
+	
+	return retval;
+}
+
+#endif
+
+
+/* Ethernet Tx Underflow interrupt */
+static irqreturn_t
+rc32434_und_interrupt(int irq, void *dev_id)
+{
+	struct net_device *dev = (struct net_device *)dev_id;
+	struct rc32434_local *lp;
+	unsigned int und;
+	irqreturn_t retval = IRQ_NONE;
+	
+	ASSERT(dev != NULL);
+	
+	lp = (struct rc32434_local *)dev->priv;
+	
+	spin_lock(&lp->lock);
+	
+	und = __raw_readl(&lp->eth_regs->ethintfc);
+	
+	if(und & ETHINTFC_und_m) {
+		netif_stop_queue(dev);
+		
+		__raw_writel((und & ~ETHINTFC_und_m), &lp->eth_regs->ethintfc);
+		
+		/* Restart interface */
+		rc32434_restart(dev);
+		retval = IRQ_HANDLED;
+	}
+	
+	spin_unlock(&lp->lock);
+	
+	return retval;
+}
+
+
+/* Ethernet Rx DMA interrupt */
+static irqreturn_t
+rc32434_rx_dma_interrupt(int irq, void *dev_id)
+{
+	struct net_device *dev = (struct net_device *)dev_id;
+	struct rc32434_local* lp;
+	volatile u32 dmas,dmasm;
+	irqreturn_t retval;
+	
+	ASSERT(dev != NULL);
+	
+	lp = (struct rc32434_local *)dev->priv;
+	
+	spin_lock(&lp->lock);
+	dmas = __raw_readl(&lp->rx_dma_regs->dmas);
+	if(dmas & (DMAS_d_m|DMAS_h_m|DMAS_e_m)) {
+		/* Mask D H E bit in Rx DMA */
+		dmasm = __raw_readl(&lp->rx_dma_regs->dmasm);
+		__raw_writel(dmasm | (DMASM_d_m | DMASM_h_m | DMASM_e_m), &lp->rx_dma_regs->dmasm);
+#ifdef CONFIG_IDT_USE_NAPI
+		if(netif_rx_schedule_prep(dev))
+                        __netif_rx_schedule(dev);
+#else
+		tasklet_hi_schedule(lp->rx_tasklet);
+#endif
+		
+		if (dmas & DMAS_e_m)
+			ERR(": DMA error\n");
+		
+		retval = IRQ_HANDLED;
+	}
+	else
+		retval = IRQ_NONE;
+	
+	spin_unlock(&lp->lock);
+	return retval;
+}
+
+#ifdef CONFIG_IDT_USE_NAPI
+static int rc32434_poll(struct net_device *rx_data_dev, int *budget)
+#else
+static void rc32434_rx_tasklet(unsigned long rx_data_dev)
+#endif
+{
+	struct net_device *dev = (struct net_device *)rx_data_dev;	
+	struct rc32434_local* lp = netdev_priv(dev);
+	volatile DMAD_t  rd = &lp->rd_ring[lp->rx_next_done];
+	struct sk_buff *skb, *skb_new;
+	u8* pkt_buf;
+	u32 devcs, count, pkt_len, pktuncrc_len;
+	volatile u32 dmas;
+#ifdef CONFIG_IDT_USE_NAPI
+	u32 received = 0;
+	int rx_work_limit = min(*budget,dev->quota);
+#else
+	unsigned long 	flags;
+	spin_lock_irqsave(&lp->lock, flags);
+#endif
+	
+	while ( (count = RC32434_RBSIZE - (u32)DMA_COUNT(rd->control)) != 0) {
+#ifdef CONFIG_IDT_USE_NAPI
+		if(--rx_work_limit <0)
+                {
+                        break;
+                }
+#endif
+		/* init the var. used for the later operations within the while loop */
+		skb_new = NULL;
+		devcs = rd->devcs;
+		pkt_len = RCVPKT_LENGTH(devcs);
+		skb = lp->rx_skb[lp->rx_next_done];
+      
+		if (count < 64) {
+			lp->stats.rx_errors++;
+			lp->stats.rx_dropped++;			
+		}
+		else if ((devcs & ( ETHRX_ld_m)) !=	ETHRX_ld_m) {
+			/* check that this is a whole packet */
+			/* WARNING: DMA_FD bit incorrectly set in Rc32434 (errata ref #077) */
+			lp->stats.rx_errors++;
+			lp->stats.rx_dropped++;
+		}
+		else if ( (devcs & ETHRX_rok_m)  ) {
+			
+			{
+				/* must be the (first and) last descriptor then */
+				pkt_buf = (u8*)lp->rx_skb[lp->rx_next_done]->data;
+				
+				pktuncrc_len = pkt_len - 4;
+				/* invalidate the cache */
+				dma_cache_inv((unsigned long)pkt_buf, pktuncrc_len);
+				
+				/* Malloc up new buffer. */					  
+				skb_new = dev_alloc_skb(RC32434_RBSIZE + 2);					             	
+				
+				if (skb_new != NULL){
+					/* Make room */
+					skb_put(skb, pktuncrc_len);		    
+					
+					skb->protocol = eth_type_trans(skb, dev);
+					
+					/* pass the packet to upper layers */
+#ifdef CONFIG_IDT_USE_NAPI
+					netif_receive_skb(skb);
+#else
+					netif_rx(skb);
+#endif
+					
+					dev->last_rx = jiffies;
+					lp->stats.rx_packets++;
+					lp->stats.rx_bytes += pktuncrc_len;
+					
+					if (IS_RCV_MP(devcs))
+						lp->stats.multicast++;
+					
+					/* 16 bit align */						  
+					skb_reserve(skb_new, 2);	
+					
+					skb_new->dev = dev;
+					lp->rx_skb[lp->rx_next_done] = skb_new;
+				}
+				else {
+					ERR("no memory, dropping rx packet.\n");
+					lp->stats.rx_errors++;		
+					lp->stats.rx_dropped++;					
+				}
+			}
+			
+		}			
+		else {
+			/* This should only happen if we enable accepting broken packets */
+			lp->stats.rx_errors++;
+			lp->stats.rx_dropped++;
+			
+			/* add statistics counters */
+			if (IS_RCV_CRC_ERR(devcs)) {
+				DBG(2, "RX CRC error\n");
+				lp->stats.rx_crc_errors++;
+			} 
+			else if (IS_RCV_LOR_ERR(devcs)) {
+				DBG(2, "RX LOR error\n");
+				lp->stats.rx_length_errors++;
+			}				
+			else if (IS_RCV_LE_ERR(devcs)) {
+				DBG(2, "RX LE error\n");
+				lp->stats.rx_length_errors++;
+			}
+			else if (IS_RCV_OVR_ERR(devcs)) {
+				lp->stats.rx_over_errors++;
+			}
+			else if (IS_RCV_CV_ERR(devcs)) {
+				/* code violation */
+				DBG(2, "RX CV error\n");
+				lp->stats.rx_frame_errors++;
+			}
+			else if (IS_RCV_CES_ERR(devcs)) {
+				DBG(2, "RX Preamble error\n");
+			}
+		}
+		
+		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(RC32434_RBSIZE) |DMAD_cod_m |DMAD_iod_m;
+		lp->rd_ring[(lp->rx_next_done-1)& RC32434_RDS_MASK].control &=  ~(DMAD_cod_m); 	
+		
+		lp->rx_next_done = (lp->rx_next_done + 1) & RC32434_RDS_MASK;
+		rd = &lp->rd_ring[lp->rx_next_done];
+		__raw_writel( ~DMAS_d_m, &lp->rx_dma_regs->dmas);
+	}	
+#ifdef CONFIG_IDT_USE_NAPI
+        dev->quota -= received;
+        *budget =- received;
+        if(rx_work_limit < 0)
+                goto not_done;
+#endif
+	
+	dmas = __raw_readl(&lp->rx_dma_regs->dmas);
+	
+	if(dmas & DMAS_h_m) {
+		__raw_writel( ~(DMAS_h_m | DMAS_e_m), &lp->rx_dma_regs->dmas);
+#ifdef RC32434_PROC_DEBUG
+		lp->dma_halt_cnt++;
+#endif
+		rd->devcs = 0;
+		skb = lp->rx_skb[lp->rx_next_done];
+		rd->ca = CPHYSADDR(skb->data);
+		rc32434_chain_rx(lp,rd);
+	}
+	
+#ifdef CONFIG_IDT_USE_NAPI
+	netif_rx_complete(dev);
+#endif
+	/* Enable D H E bit in Rx DMA */
+	__raw_writel(__raw_readl(&lp->rx_dma_regs->dmasm) & ~(DMASM_d_m | DMASM_h_m |DMASM_e_m), &lp->rx_dma_regs->dmasm); 
+#ifdef CONFIG_IDT_USE_NAPI
+	return 0;
+ not_done:
+	return 1;
+#else
+	spin_unlock_irqrestore(&lp->lock, flags);
+	return;
+#endif
+
+	
+}	
+
+
+
+/* Ethernet Tx DMA interrupt */
+static irqreturn_t
+rc32434_tx_dma_interrupt(int irq, void *dev_id)
+{
+	struct net_device *dev = (struct net_device *)dev_id;
+	struct rc32434_local *lp;
+	volatile u32 dmas,dmasm;
+	irqreturn_t retval;
+	
+	ASSERT(dev != NULL);
+	
+	lp = (struct rc32434_local *)dev->priv;
+	
+	spin_lock(&lp->lock);
+	
+	dmas = __raw_readl(&lp->tx_dma_regs->dmas);
+	
+	if (dmas & (DMAS_f_m | DMAS_e_m)) {
+		dmasm = __raw_readl(&lp->tx_dma_regs->dmasm);
+		/* Mask F E bit in Tx DMA */
+		__raw_writel(dmasm | (DMASM_f_m | DMASM_e_m), &lp->tx_dma_regs->dmasm);
+		
+		tasklet_hi_schedule(lp->tx_tasklet);
+		
+		if(lp->tx_chain_status == filled && (__raw_readl(&(lp->tx_dma_regs->dmandptr)) == 0)) {
+			__raw_writel(CPHYSADDR(&lp->td_ring[lp->tx_chain_head]), &(lp->tx_dma_regs->dmandptr));			
+			lp->tx_chain_status = empty;
+			lp->tx_chain_head = lp->tx_chain_tail;
+			dev->trans_start = jiffies;
+		}
+		
+		if (dmas & DMAS_e_m)
+			ERR(": DMA error\n");
+		
+		retval = IRQ_HANDLED;
+	}
+	else
+		retval = IRQ_NONE;
+	
+	spin_unlock(&lp->lock);
+	
+	return retval;
+}
+
+
+static void rc32434_tx_tasklet(unsigned long tx_data_dev)
+{
+	struct net_device *dev = (struct net_device *)tx_data_dev;	
+	struct rc32434_local* lp = (struct rc32434_local *)dev->priv;
+	volatile DMAD_t td = &lp->td_ring[lp->tx_next_done];
+	u32 devcs;
+	unsigned long 	flags;
+	volatile u32 dmas;
+	
+	spin_lock_irqsave(&lp->lock, flags);
+	
+	/* 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 & (ETHTX_fd_m | ETHTX_ld_m)) != (ETHTX_fd_m | ETHTX_ld_m)) {
+			lp->stats.tx_errors++;
+			lp->stats.tx_dropped++;				
+			
+			/* should never happen */
+			DBG(1, __FUNCTION__ ": split tx ignored\n");
+		}
+		else if (IS_TX_TOK(devcs)) {
+			lp->stats.tx_packets++;
+		}
+		else {
+			lp->stats.tx_errors++;
+			lp->stats.tx_dropped++;				
+			
+			/* underflow */
+			if (IS_TX_UND_ERR(devcs)) 
+				lp->stats.tx_fifo_errors++;
+			
+			/* oversized frame */
+			if (IS_TX_OF_ERR(devcs))
+				lp->stats.tx_aborted_errors++;
+			
+			/* excessive deferrals */
+			if (IS_TX_ED_ERR(devcs))
+				lp->stats.tx_carrier_errors++;
+			
+			/* collisions: medium busy */
+			if (IS_TX_EC_ERR(devcs))
+				lp->stats.collisions++;
+			
+			/* late collision */
+			if (IS_TX_LC_ERR(devcs))
+				lp->stats.tx_window_errors++;
+			
+		}
+		
+		/* We must always free the original skb */
+		if (lp->tx_skb[lp->tx_next_done] != NULL) {
+			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 = DMAD_iof_m;
+		lp->td_ring[lp->tx_next_done].devcs = ETHTX_fd_m | ETHTX_ld_m;	
+		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) & RC32434_TDS_MASK;
+		td = &lp->td_ring[lp->tx_next_done];
+		
+	}
+	
+	dmas = __raw_readl(&lp->tx_dma_regs->dmas);
+	__raw_writel( ~dmas, &lp->tx_dma_regs->dmas);
+	
+	/* Enable F E bit in Tx DMA */
+	__raw_writel(__raw_readl(&lp->tx_dma_regs->dmasm) & ~(DMASM_f_m | DMASM_e_m), &lp->tx_dma_regs->dmasm); 
+	spin_unlock_irqrestore(&lp->lock, flags);
+	
+}
+
+
+static struct net_device_stats * rc32434_get_stats(struct net_device *dev)
+{
+	struct rc32434_local *lp = (struct rc32434_local *)dev->priv;
+	return &lp->stats;
+}
+
+
+/*
+ * Set or clear the multicast filter for this adaptor.
+ */
+static void rc32434_multicast_list(struct net_device *dev)
+{   
+	/* listen to broadcasts always and to treat 	*/
+	/*       IFF bits independantly	*/
+	struct rc32434_local *lp = (struct rc32434_local *)dev->priv;
+	unsigned long flags;
+	u32 recognise = ETHARC_ab_m; 		/* always accept broadcasts */
+	
+	if (dev->flags & IFF_PROMISC)         		/* set promiscuous mode */
+		recognise |= ETHARC_pro_m;
+	
+	if ((dev->flags & IFF_ALLMULTI) || (dev->mc_count > 15))
+		recognise |= ETHARC_am_m;    	  	/* all multicast & bcast */
+	else if (dev->mc_count > 0) {
+		DBG(2, __FUNCTION__ ": mc_count %d\n", dev->mc_count);
+		recognise |= ETHARC_am_m;    	  	/* for the time being */
+	}
+	
+	spin_lock_irqsave(&lp->lock, flags);
+	__raw_writel(recognise, &lp->eth_regs->etharc);
+	spin_unlock_irqrestore(&lp->lock, flags);
+}
+
+
+static void rc32434_tx_timeout(struct net_device *dev)
+{
+	struct rc32434_local *lp = (struct rc32434_local *)dev->priv;
+	unsigned long flags;
+	
+	spin_lock_irqsave(&lp->lock, flags);
+	rc32434_restart(dev);
+	spin_unlock_irqrestore(&lp->lock, flags);
+	
+}
+
+
+/*
+ * Initialize the RC32434 ethernet controller.
+ */
+static int rc32434_init(struct net_device *dev)
+{
+	struct rc32434_local *lp = (struct rc32434_local *)dev->priv;
+	int i, j;
+	
+	/* Disable DMA */       
+	rc32434_abort_tx(dev);
+	rc32434_abort_rx(dev); 
+	
+	/* reset ethernet logic */ 
+	__raw_writel(0, &lp->eth_regs->ethintfc);
+	while((__raw_readl(&lp->eth_regs->ethintfc) & ETHINTFC_rip_m))
+		dev->trans_start = jiffies;	
+	
+	/* Enable Ethernet Interface */ 
+	__raw_writel(ETHINTFC_en_m, &lp->eth_regs->ethintfc); 
+	
+#ifndef CONFIG_IDT_USE_NAPI
+	tasklet_disable(lp->rx_tasklet);
+#endif
+	tasklet_disable(lp->tx_tasklet);
+	
+	/* Initialize the transmit Descriptors */
+	for (i = 0; i < RC32434_NUM_TDS; i++) {
+		lp->td_ring[i].control = DMAD_iof_m;
+		lp->td_ring[i].devcs = ETHTX_fd_m | ETHTX_ld_m;
+		lp->td_ring[i].ca = 0;
+		lp->td_ring[i].link = 0;
+		if (lp->tx_skb[i] != NULL) {
+			dev_kfree_skb_any(lp->tx_skb[i]);
+			lp->tx_skb[i] = NULL;
+		}
+	}
+	lp->tx_next_done = lp->tx_chain_head = lp->tx_chain_tail = 	lp->tx_full = lp->tx_count = 0;
+	lp->	tx_chain_status = empty;
+	
+	/*
+	 * Initialize the receive descriptors so that they
+	 * become a circular linked list, ie. let the last
+	 * descriptor point to the first again.
+	 */
+	for (i=0; i<RC32434_NUM_RDS; i++) {
+		struct sk_buff *skb = lp->rx_skb[i];
+		
+		if (lp->rx_skb[i] == NULL) {
+			skb = dev_alloc_skb(RC32434_RBSIZE + 2);
+			if (skb == NULL) {
+				ERR("No memory in the system\n");
+				for (j = 0; j < RC32434_NUM_RDS; j ++)
+					if (lp->rx_skb[j] != NULL) 
+						dev_kfree_skb_any(lp->rx_skb[j]);
+				
+				return 1;
+			}
+			else {
+				skb->dev = dev;
+				skb_reserve(skb, 2);
+				lp->rx_skb[i] = skb;
+				lp->rd_ring[i].ca = CPHYSADDR(skb->data); 
+				
+			}
+		}
+		lp->rd_ring[i].control =	DMAD_iod_m | DMA_COUNT(RC32434_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 */
+	lp->rd_ring[RC32434_NUM_RDS-1].link = CPHYSADDR(&lp->rd_ring[0]);
+	lp->rx_next_done   = 0;
+	
+	lp->rd_ring[RC32434_NUM_RDS-1].control |= DMAD_cod_m;
+	lp->rx_chain_head = 0;
+	lp->rx_chain_tail = 0;
+	lp->rx_chain_status = empty;
+	
+	__raw_writel(0, &lp->rx_dma_regs->dmas);
+	/* Start Rx DMA */
+	rc32434_start_rx(lp, &lp->rd_ring[0]);
+	
+	/* Enable F E bit in Tx DMA */
+	__raw_writel(__raw_readl(&lp->tx_dma_regs->dmasm) & ~(DMASM_f_m | DMASM_e_m), &lp->tx_dma_regs->dmasm); 
+	/* Enable D H E bit in Rx DMA */
+	__raw_writel(__raw_readl(&lp->rx_dma_regs->dmasm) & ~(DMASM_d_m | DMASM_h_m | DMASM_e_m), &lp->rx_dma_regs->dmasm); 
+	
+	/* Accept only packets destined for this Ethernet device address */
+	__raw_writel(ETHARC_ab_m, &lp->eth_regs->etharc); 
+	
+	/* Set all Ether station address registers to their initial values */ 
+	__raw_writel(STATION_ADDRESS_LOW(dev), &lp->eth_regs->ethsal0); 
+	__raw_writel(STATION_ADDRESS_HIGH(dev), &lp->eth_regs->ethsah0);
+	
+	__raw_writel(STATION_ADDRESS_LOW(dev), &lp->eth_regs->ethsal1); 
+	__raw_writel(STATION_ADDRESS_HIGH(dev), &lp->eth_regs->ethsah1);
+	
+	__raw_writel(STATION_ADDRESS_LOW(dev), &lp->eth_regs->ethsal2); 
+	__raw_writel(STATION_ADDRESS_HIGH(dev), &lp->eth_regs->ethsah2);
+	
+	__raw_writel(STATION_ADDRESS_LOW(dev), &lp->eth_regs->ethsal3); 
+	__raw_writel(STATION_ADDRESS_HIGH(dev), &lp->eth_regs->ethsah3); 
+	
+	
+	/* Frame Length Checking, Pad Enable, CRC Enable, Full Duplex set */ 
+	__raw_writel(ETHMAC2_pe_m | ETHMAC2_cen_m | ETHMAC2_fd_m, &lp->eth_regs->ethmac2);  
+	//ETHMAC2_flc_m		ETHMAC2_fd_m	lp->duplex_mode
+	
+	/* Back to back inter-packet-gap */ 
+	__raw_writel(0x15, &lp->eth_regs->ethipgt); 
+	/* Non - Back to back inter-packet-gap */ 
+	__raw_writel(0x12, &lp->eth_regs->ethipgr); 
+	
+	/* Management Clock Prescaler Divisor */
+	/* Clock independent setting */
+	__raw_writel(((idt_cpu_freq)/MII_CLOCK+1) & ~1,
+		       &lp->eth_regs->ethmcp);
+	
+	/* don't transmit until fifo contains 48b */
+	__raw_writel(48, &lp->eth_regs->ethfifott);
+	
+	__raw_writel(ETHMAC1_re_m, &lp->eth_regs->ethmac1);
+	
+#ifndef CONFIG_IDT_USE_NAPI
+	tasklet_enable(lp->rx_tasklet);
+#endif
+	tasklet_enable(lp->tx_tasklet);
+	
+	netif_start_queue(dev);
+	
+	return 0; 
+}
+
+static struct platform_driver korina_driver = {
+	.driver.name = "korina",
+	.probe = rc32434_probe,
+	.remove = rc32434_remove,
+};
+
+static int __init rc32434_init_module(void)
+{
+	return platform_driver_register(&korina_driver);
+}
+
+static void rc32434_cleanup_module(void)
+{
+	return platform_driver_unregister(&korina_driver);
+}
+
+module_init(rc32434_init_module);
+module_exit(rc32434_cleanup_module);
diff -urN linux.old/drivers/net/Makefile linux.dev/drivers/net/Makefile
--- linux.old/drivers/net/Makefile	2006-12-14 03:13:47.000000000 +0100
+++ linux.dev/drivers/net/Makefile	2006-12-14 03:18:45.000000000 +0100
@@ -23,6 +23,8 @@
 #
 obj-$(CONFIG_PLIP) += plip.o
 
+obj-$(CONFIG_KORINA) += korina.o
+
 obj-$(CONFIG_ROADRUNNER) += rrunner.o
 
 obj-$(CONFIG_HAPPYMEAL) += sunhme.o
diff -urN linux.old/drivers/net/rc32434_eth.h linux.dev/drivers/net/rc32434_eth.h
--- linux.old/drivers/net/rc32434_eth.h	1970-01-01 01:00:00.000000000 +0100
+++ linux.dev/drivers/net/rc32434_eth.h	2006-12-14 03:18:45.000000000 +0100
@@ -0,0 +1,178 @@
+/**************************************************************************
+ *
+ *  BRIEF MODULE DESCRIPTION
+ *     Definitions for IDT RC32434 on-chip ethernet controller.
+ *
+ *  Copyright 2004 IDT Inc. (rischelp@idt.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  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.
+ *
+ *
+ **************************************************************************
+ * May 2004 rkt, neb
+ *
+ * Initial Release
+ *
+ * Aug 2004
+ *
+ * Added NAPI
+ *
+ **************************************************************************
+ */
+
+
+#include  <asm/rc32434/rc32434.h>
+#include  <asm/rc32434/dma_v.h>
+#include  <asm/rc32434/eth_v.h>
+
+#define CONFIG_IDT_USE_NAPI 1
+#define RC32434_DEBUG	2
+//#define RC32434_PROC_DEBUG
+#undef	RC32434_DEBUG
+
+#ifdef RC32434_DEBUG
+
+/* use 0 for production, 1 for verification, >2 for debug */
+static int rc32434_debug = RC32434_DEBUG;
+#define ASSERT(expr) \
+	if(!(expr)) {	\
+		printk( "Assertion failed! %s,%s,%s,line=%d\n",	\
+		#expr,__FILE__,__FUNCTION__,__LINE__);		}
+#define DBG(lvl, format, arg...) if (rc32434_debug > lvl) printk(KERN_INFO "%s: " format, dev->name , ## arg)
+#else
+#define ASSERT(expr) do {} while (0)
+#define DBG(lvl, format, arg...) do {} while (0)
+#endif
+
+#define INFO(format, arg...) printk(KERN_INFO "%s: " format, dev->name , ## arg)
+#define ERR(format, arg...) printk(KERN_ERR "%s: " format, dev->name , ## arg)
+#define WARN(format, arg...) printk(KERN_WARNING "%s: " format, dev->name , ## arg)		
+
+/* the following must be powers of two */
+#ifdef CONFIG_IDT_USE_NAPI
+#define RC32434_NUM_RDS    64    		/* number of receive descriptors */
+#define RC32434_NUM_TDS    64    		/* number of transmit descriptors */
+#else
+#define RC32434_NUM_RDS    128    		/* number of receive descriptors */
+#define RC32434_NUM_TDS    128    		/* number of transmit descriptors */
+#endif
+
+#define RC32434_RBSIZE     1536  		/* size of one resource buffer = Ether MTU */
+#define RC32434_RDS_MASK   (RC32434_NUM_RDS-1)
+#define RC32434_TDS_MASK   (RC32434_NUM_TDS-1)
+#define RD_RING_SIZE (RC32434_NUM_RDS * sizeof(struct DMAD_s))
+#define TD_RING_SIZE (RC32434_NUM_TDS * sizeof(struct DMAD_s))
+
+#define RC32434_TX_TIMEOUT HZ * 100
+
+#define rc32434_eth0_regs ((ETH_t)(ETH0_VirtualAddress))
+#define rc32434_eth1_regs ((ETH_t)(ETH1_VirtualAddress))
+
+enum status	{ filled,	empty};
+#define IS_DMA_FINISHED(X)   (((X) & (DMAD_f_m)) != 0)
+#define IS_DMA_DONE(X)   (((X) & (DMAD_d_m)) != 0)
+
+
+/* Information that need to be kept for each board. */
+struct rc32434_local {
+	ETH_t  eth_regs;
+	DMA_Chan_t  rx_dma_regs;
+	DMA_Chan_t  tx_dma_regs;
+	volatile DMAD_t   td_ring;			/* transmit descriptor ring */ 
+	volatile DMAD_t   rd_ring;			/* receive descriptor ring  */
+	
+	struct sk_buff* tx_skb[RC32434_NUM_TDS]; 	/* skbuffs for pkt to trans */
+	struct sk_buff* rx_skb[RC32434_NUM_RDS]; 	/* skbuffs for pkt to trans */
+	
+#ifndef CONFIG_IDT_USE_NAPI
+	struct tasklet_struct * rx_tasklet;
+#endif
+	struct tasklet_struct * tx_tasklet;
+	
+	int	rx_next_done;
+	int	rx_chain_head;
+	int	rx_chain_tail;
+	enum status	rx_chain_status;
+	
+	int	tx_next_done;
+	int	tx_chain_head;
+	int	tx_chain_tail;
+	enum status	tx_chain_status;
+	int tx_count;			
+	int	tx_full;
+	
+	struct timer_list    mii_phy_timer;
+	unsigned long duplex_mode;
+	
+	int   	rx_irq;
+	int    tx_irq;
+	int    ovr_irq;
+	int    und_irq;
+	
+	struct net_device_stats stats;
+	spinlock_t lock; 
+	
+	/* debug /proc entry */
+	struct proc_dir_entry *ps;
+	int dma_halt_cnt;  int dma_run_cnt;
+};
+
+extern unsigned int idt_cpu_freq;
+
+/* Index to functions, as function prototypes. */
+static int rc32434_open(struct net_device *dev);
+static int rc32434_send_packet(struct sk_buff *skb, struct net_device *dev);
+static void rc32434_mii_handler(unsigned long data);
+static irqreturn_t  rc32434_und_interrupt(int irq, void *dev_id);
+static irqreturn_t rc32434_rx_dma_interrupt(int irq, void *dev_id);
+static irqreturn_t rc32434_tx_dma_interrupt(int irq, void *dev_id);
+#ifdef	RC32434_REVISION	
+static irqreturn_t rc32434_ovr_interrupt(int irq, void *dev_id);
+#endif
+static int  rc32434_close(struct net_device *dev);
+static struct net_device_stats *rc32434_get_stats(struct net_device *dev);
+static void rc32434_multicast_list(struct net_device *dev);
+static int  rc32434_init(struct net_device *dev);
+static void rc32434_tx_timeout(struct net_device *dev);
+
+static void rc32434_tx_tasklet(unsigned long tx_data_dev);
+#ifdef CONFIG_IDT_USE_NAPI
+static int rc32434_poll(struct net_device *rx_data_dev, int *budget);
+#else
+static void rc32434_rx_tasklet(unsigned long rx_data_dev);
+#endif
+static void rc32434_cleanup_module(void);
+
+
+static inline void rc32434_abort_dma(struct net_device *dev, DMA_Chan_t ch)
+{
+	if (__raw_readl(&ch->dmac) & DMAC_run_m) {
+		__raw_writel(0x10, &ch->dmac); 
+		
+		while (!(__raw_readl(&ch->dmas) & DMAS_h_m))
+			dev->trans_start = jiffies;		
+		
+		__raw_writel(0, &ch->dmas);  
+	}
+	
+	__raw_writel(0, &ch->dmadptr); 
+	__raw_writel(0, &ch->dmandptr); 
+}