Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 1277 insertions, 0 deletions

diff --git a/drivers/net/ni65.c b/drivers/net/ni65.c
new file mode 100644
index 00000000000..925d1dfcc4d
--- /dev/null
+++ b/drivers/net/ni65.c
@@ -0,0 +1,1277 @@
+/*
+ * ni6510 (am7990 'lance' chip) driver for Linux-net-3
+ * BETAcode v0.71 (96/09/29) for 2.0.0 (or later)
+ * copyrights (c) 1994,1995,1996 by M.Hipp
+ *
+ * This driver can handle the old ni6510 board and the newer ni6510
+ * EtherBlaster. (probably it also works with every full NE2100
+ * compatible card)
+ *
+ * To compile as module, type:
+ *     gcc -O2 -fomit-frame-pointer -m486 -D__KERNEL__ -DMODULE -c ni65.c
+ * driver probes: io: 0x360,0x300,0x320,0x340 / dma: 3,5,6,7
+ *
+ * This is an extension to the Linux operating system, and is covered by the
+ * same GNU General Public License that covers the Linux-kernel.
+ *
+ * comments/bugs/suggestions can be sent to:
+ *   Michael Hipp
+ *   email: hippm@informatik.uni-tuebingen.de
+ *
+ * sources:
+ *   some things are from the 'ni6510-packet-driver for dos by Russ Nelson'
+ *   and from the original drivers by D.Becker
+ *
+ * known problems:
+ *   - on some PCI boards (including my own) the card/board/ISA-bridge has
+ *     problems with bus master DMA. This results in lotsa overruns.
+ *     It may help to '#define RCV_PARANOIA_CHECK' or try to #undef
+ *     the XMT and RCV_VIA_SKB option .. this reduces driver performance.
+ *     Or just play with your BIOS options to optimize ISA-DMA access.
+ *     Maybe you also wanna play with the LOW_PERFORAMCE and MID_PERFORMANCE
+ *     defines -> please report me your experience then
+ *   - Harald reported for ASUS SP3G mainboards, that you should use
+ *     the 'optimal settings' from the user's manual on page 3-12!
+ *
+ * credits:
+ *   thanx to Jason Sullivan for sending me a ni6510 card!
+ *   lot of debug runs with ASUS SP3G Boards (Intel Saturn) by Harald Koenig
+ *
+ * simple performance test: (486DX-33/Ni6510-EB receives from 486DX4-100/Ni6510-EB)
+ *    average: FTP -> 8384421 bytes received in 8.5 seconds
+ *           (no RCV_VIA_SKB,no XMT_VIA_SKB,PARANOIA_CHECK,4 XMIT BUFS, 8 RCV_BUFFS)
+ *    peak: FTP -> 8384421 bytes received in 7.5 seconds
+ *           (RCV_VIA_SKB,XMT_VIA_SKB,no PARANOIA_CHECK,1(!) XMIT BUF, 16 RCV BUFFS)
+ */
+
+/*
+ * 99.Jun.8: added support for /proc/net/dev byte count for xosview (HK)
+ * 96.Sept.29: virt_to_bus stuff added for new memory modell
+ * 96.April.29: Added Harald Koenig's Patches (MH)
+ * 96.April.13: enhanced error handling .. more tests (MH)
+ * 96.April.5/6: a lot of performance tests. Got it stable now (hopefully) (MH)
+ * 96.April.1: (no joke ;) .. added EtherBlaster and Module support (MH)
+ * 96.Feb.19: fixed a few bugs .. cleanups .. tested for 1.3.66 (MH)
+ *            hopefully no more 16MB limit
+ *
+ * 95.Nov.18: multicast tweaked (AC).
+ *
+ * 94.Aug.22: changes in xmit_intr (ack more than one xmitted-packet), ni65_send_packet (p->lock) (MH)
+ *
+ * 94.July.16: fixed bugs in recv_skb and skb-alloc stuff  (MH)
+ */
+
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/errno.h>
+#include <linux/ioport.h>
+#include <linux/slab.h>
+#include <linux/interrupt.h>
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/skbuff.h>
+#include <linux/module.h>
+#include <linux/bitops.h>
+
+#include <asm/io.h>
+#include <asm/dma.h>
+
+#include "ni65.h"
+
+/*
+ * the current setting allows an acceptable performance
+ * for 'RCV_PARANOIA_CHECK' read the 'known problems' part in
+ * the header of this file
+ * 'invert' the defines for max. performance. This may cause DMA problems
+ * on some boards (e.g on my ASUS SP3G)
+ */
+#undef XMT_VIA_SKB
+#undef RCV_VIA_SKB
+#define RCV_PARANOIA_CHECK
+
+#define MID_PERFORMANCE
+
+#if   defined( LOW_PERFORMANCE )
+ static int isa0=7,isa1=7,csr80=0x0c10;
+#elif defined( MID_PERFORMANCE )
+ static int isa0=5,isa1=5,csr80=0x2810;
+#else	/* high performance */
+ static int isa0=4,isa1=4,csr80=0x0017;
+#endif
+
+/*
+ * a few card/vendor specific defines
+ */
+#define NI65_ID0    0x00
+#define NI65_ID1    0x55
+#define NI65_EB_ID0 0x52
+#define NI65_EB_ID1 0x44
+#define NE2100_ID0  0x57
+#define NE2100_ID1  0x57
+
+#define PORT p->cmdr_addr
+
+/*
+ * buffer configuration
+ */
+#if 1
+#define RMDNUM 16
+#define RMDNUMMASK 0x80000000
+#else
+#define RMDNUM 8
+#define RMDNUMMASK 0x60000000 /* log2(RMDNUM)<<29 */
+#endif
+
+#if 0
+#define TMDNUM 1
+#define TMDNUMMASK 0x00000000
+#else
+#define TMDNUM 4
+#define TMDNUMMASK 0x40000000 /* log2(TMDNUM)<<29 */
+#endif
+
+/* slightly oversized */
+#define R_BUF_SIZE 1544
+#define T_BUF_SIZE 1544
+
+/*
+ * lance register defines
+ */
+#define L_DATAREG 0x00
+#define L_ADDRREG 0x02
+#define L_RESET   0x04
+#define L_CONFIG  0x05
+#define L_BUSIF   0x06
+
+/*
+ * to access the lance/am7990-regs, you have to write
+ * reg-number into L_ADDRREG, then you can access it using L_DATAREG
+ */
+#define CSR0  0x00
+#define CSR1  0x01
+#define CSR2  0x02
+#define CSR3  0x03
+
+#define INIT_RING_BEFORE_START	0x1
+#define FULL_RESET_ON_ERROR	0x2
+
+#if 0
+#define writereg(val,reg) {outw(reg,PORT+L_ADDRREG);inw(PORT+L_ADDRREG); \
+                           outw(val,PORT+L_DATAREG);inw(PORT+L_DATAREG);}
+#define readreg(reg) (outw(reg,PORT+L_ADDRREG),inw(PORT+L_ADDRREG),\
+                       inw(PORT+L_DATAREG))
+#if 0
+#define writedatareg(val) {outw(val,PORT+L_DATAREG);inw(PORT+L_DATAREG);}
+#else
+#define writedatareg(val) {  writereg(val,CSR0); }
+#endif
+#else
+#define writereg(val,reg) {outw(reg,PORT+L_ADDRREG);outw(val,PORT+L_DATAREG);}
+#define readreg(reg) (outw(reg,PORT+L_ADDRREG),inw(PORT+L_DATAREG))
+#define writedatareg(val) { writereg(val,CSR0); }
+#endif
+
+static unsigned char ni_vendor[] = { 0x02,0x07,0x01 };
+
+static struct card {
+	unsigned char id0,id1;
+	short id_offset;
+	short total_size;
+	short cmd_offset;
+	short addr_offset;
+	unsigned char *vendor_id;
+	char *cardname;
+	long config;
+} cards[] = {
+	{
+		.id0	     = NI65_ID0,
+		.id1	     = NI65_ID1,
+		.id_offset   = 0x0e,
+		.total_size  = 0x10,
+		.cmd_offset  = 0x0,
+		.addr_offset = 0x8,
+		.vendor_id   = ni_vendor,
+		.cardname    = "ni6510",
+		.config	     = 0x1,
+       	},
+	{
+		.id0	     = NI65_EB_ID0,
+		.id1	     = NI65_EB_ID1,
+		.id_offset   = 0x0e,
+		.total_size  = 0x18,
+		.cmd_offset  = 0x10,
+		.addr_offset = 0x0,
+		.vendor_id   = ni_vendor,
+		.cardname    = "ni6510 EtherBlaster",
+		.config	     = 0x2,
+       	},
+	{
+		.id0	     = NE2100_ID0,
+		.id1	     = NE2100_ID1,
+		.id_offset   = 0x0e,
+		.total_size  = 0x18,
+		.cmd_offset  = 0x10,
+		.addr_offset = 0x0,
+		.vendor_id   = NULL,
+		.cardname    = "generic NE2100",
+		.config	     = 0x0,
+	},
+};
+#define NUM_CARDS 3
+
+struct priv
+{
+	struct rmd rmdhead[RMDNUM];
+	struct tmd tmdhead[TMDNUM];
+	struct init_block ib;
+	int rmdnum;
+	int tmdnum,tmdlast;
+#ifdef RCV_VIA_SKB
+	struct sk_buff *recv_skb[RMDNUM];
+#else
+	void *recvbounce[RMDNUM];
+#endif
+#ifdef XMT_VIA_SKB
+	struct sk_buff *tmd_skb[TMDNUM];
+#endif
+	void *tmdbounce[TMDNUM];
+	int tmdbouncenum;
+	int lock,xmit_queued;
+	struct net_device_stats stats;
+	void *self;
+	int cmdr_addr;
+	int cardno;
+	int features;
+	spinlock_t ring_lock;
+};
+
+static int  ni65_probe1(struct net_device *dev,int);
+static irqreturn_t ni65_interrupt(int irq, void * dev_id, struct pt_regs *regs);
+static void ni65_recv_intr(struct net_device *dev,int);
+static void ni65_xmit_intr(struct net_device *dev,int);
+static int  ni65_open(struct net_device *dev);
+static int  ni65_lance_reinit(struct net_device *dev);
+static void ni65_init_lance(struct priv *p,unsigned char*,int,int);
+static int  ni65_send_packet(struct sk_buff *skb, struct net_device *dev);
+static void  ni65_timeout(struct net_device *dev);
+static int  ni65_close(struct net_device *dev);
+static int  ni65_alloc_buffer(struct net_device *dev);
+static void ni65_free_buffer(struct priv *p);
+static struct net_device_stats *ni65_get_stats(struct net_device *);
+static void set_multicast_list(struct net_device *dev);
+
+static int irqtab[] __initdata = { 9,12,15,5 }; /* irq config-translate */
+static int dmatab[] __initdata = { 0,3,5,6,7 }; /* dma config-translate and autodetect */
+
+static int debuglevel = 1;
+
+/*
+ * set 'performance' registers .. we must STOP lance for that
+ */
+static void ni65_set_performance(struct priv *p)
+{
+	writereg(CSR0_STOP | CSR0_CLRALL,CSR0); /* STOP */
+
+	if( !(cards[p->cardno].config & 0x02) )
+		return;
+
+	outw(80,PORT+L_ADDRREG);
+	if(inw(PORT+L_ADDRREG) != 80)
+		return;
+
+	writereg( (csr80 & 0x3fff) ,80); /* FIFO watermarks */
+	outw(0,PORT+L_ADDRREG);
+	outw((short)isa0,PORT+L_BUSIF); /* write ISA 0: DMA_R : isa0 * 50ns */
+	outw(1,PORT+L_ADDRREG);
+	outw((short)isa1,PORT+L_BUSIF); /* write ISA 1: DMA_W : isa1 * 50ns	*/
+
+	outw(CSR0,PORT+L_ADDRREG);	/* switch back to CSR0 */
+}
+
+/*
+ * open interface (up)
+ */
+static int ni65_open(struct net_device *dev)
+{
+	struct priv *p = (struct priv *) dev->priv;
+	int irqval = request_irq(dev->irq, &ni65_interrupt,0,
+                        cards[p->cardno].cardname,dev);
+	if (irqval) {
+		printk(KERN_ERR "%s: unable to get IRQ %d (irqval=%d).\n",
+		          dev->name,dev->irq, irqval);
+		return -EAGAIN;
+	}
+
+	if(ni65_lance_reinit(dev))
+	{
+		netif_start_queue(dev);
+		return 0;
+	}
+	else
+	{
+		free_irq(dev->irq,dev);
+		return -EAGAIN;
+	}
+}
+
+/*
+ * close interface (down)
+ */
+static int ni65_close(struct net_device *dev)
+{
+	struct priv *p = (struct priv *) dev->priv;
+
+	netif_stop_queue(dev);
+	
+	outw(inw(PORT+L_RESET),PORT+L_RESET); /* that's the hard way */
+
+#ifdef XMT_VIA_SKB
+	{
+		int i;
+		for(i=0;i<TMDNUM;i++)
+		{
+			if(p->tmd_skb[i]) {
+				dev_kfree_skb(p->tmd_skb[i]);
+				p->tmd_skb[i] = NULL;
+			}
+		}
+	}
+#endif
+	free_irq(dev->irq,dev);
+	return 0;
+}
+
+static void cleanup_card(struct net_device *dev)
+{
+	struct priv *p = (struct priv *) dev->priv;
+	disable_dma(dev->dma);
+	free_dma(dev->dma);
+	release_region(dev->base_addr, cards[p->cardno].total_size);
+	ni65_free_buffer(p);
+}
+
+/* set: io,irq,dma or set it when calling insmod */
+static int irq;
+static int io;
+static int dma;
+
+/*
+ * Probe The Card (not the lance-chip)
+ */
+struct net_device * __init ni65_probe(int unit)
+{
+	struct net_device *dev = alloc_etherdev(0);
+	static int ports[] = {0x360,0x300,0x320,0x340, 0};
+	int *port;
+	int err = 0;
+
+	if (!dev)
+		return ERR_PTR(-ENOMEM);
+
+	if (unit >= 0) {
+		sprintf(dev->name, "eth%d", unit);
+		netdev_boot_setup_check(dev);
+		irq = dev->irq;
+		dma = dev->dma;
+	} else {
+		dev->base_addr = io;
+	}
+
+	if (dev->base_addr > 0x1ff) { /* Check a single specified location. */
+		err = ni65_probe1(dev, dev->base_addr);
+	} else if (dev->base_addr > 0) { /* Don't probe at all. */
+		err = -ENXIO;
+	} else {
+		for (port = ports; *port && ni65_probe1(dev, *port); port++)
+			;
+		if (!*port)
+			err = -ENODEV;
+	}
+	if (err)
+		goto out;
+
+	err = register_netdev(dev);
+	if (err)
+		goto out1;
+	return dev;
+out1:
+	cleanup_card(dev);
+out:
+	free_netdev(dev);
+	return ERR_PTR(err);
+}
+
+/*
+ * this is the real card probe ..
+ */
+static int __init ni65_probe1(struct net_device *dev,int ioaddr)
+{
+	int i,j;
+	struct priv *p;
+	unsigned long flags;
+
+	dev->irq = irq;
+	dev->dma = dma;
+
+	for(i=0;i<NUM_CARDS;i++) {
+		if(!request_region(ioaddr, cards[i].total_size, cards[i].cardname))
+			continue;
+		if(cards[i].id_offset >= 0) {
+			if(inb(ioaddr+cards[i].id_offset+0) != cards[i].id0 ||
+				 inb(ioaddr+cards[i].id_offset+1) != cards[i].id1) {
+				 release_region(ioaddr, cards[i].total_size);
+				 continue;
+			}
+		}
+		if(cards[i].vendor_id) {
+			for(j=0;j<3;j++)
+				if(inb(ioaddr+cards[i].addr_offset+j) != cards[i].vendor_id[j]) {
+					release_region(ioaddr, cards[i].total_size);
+					continue;
+			  }
+		}
+		break;
+	}
+	if(i == NUM_CARDS)
+		return -ENODEV;
+
+	for(j=0;j<6;j++)
+		dev->dev_addr[j] = inb(ioaddr+cards[i].addr_offset+j);
+
+	if( (j=ni65_alloc_buffer(dev)) < 0) {
+		release_region(ioaddr, cards[i].total_size);
+		return j;
+	}
+	p = (struct priv *) dev->priv;
+	p->cmdr_addr = ioaddr + cards[i].cmd_offset;
+	p->cardno = i;
+	spin_lock_init(&p->ring_lock);
+
+	printk(KERN_INFO "%s: %s found at %#3x, ", dev->name, cards[p->cardno].cardname , ioaddr);
+
+	outw(inw(PORT+L_RESET),PORT+L_RESET); /* first: reset the card */
+	if( (j=readreg(CSR0)) != 0x4) {
+		 printk("failed.\n");
+		 printk(KERN_ERR "%s: Can't RESET card: %04x\n", dev->name, j);
+		 ni65_free_buffer(p);
+		 release_region(ioaddr, cards[p->cardno].total_size);
+		 return -EAGAIN;
+	}
+
+	outw(88,PORT+L_ADDRREG);
+	if(inw(PORT+L_ADDRREG) == 88) {
+		unsigned long v;
+		v = inw(PORT+L_DATAREG);
+		v <<= 16;
+		outw(89,PORT+L_ADDRREG);
+		v |= inw(PORT+L_DATAREG);
+		printk("Version %#08lx, ",v);
+		p->features = INIT_RING_BEFORE_START;
+	}
+	else {
+		printk("ancient LANCE, ");
+		p->features = 0x0;
+	}
+
+	if(test_bit(0,&cards[i].config)) {
+		dev->irq = irqtab[(inw(ioaddr+L_CONFIG)>>2)&3];
+		dev->dma = dmatab[inw(ioaddr+L_CONFIG)&3];
+		printk("IRQ %d (from card), DMA %d (from card).\n",dev->irq,dev->dma);
+	}
+	else {
+		if(dev->dma == 0) {
+		/* 'stuck test' from lance.c */
+			long dma_channels = ((inb(DMA1_STAT_REG) >> 4) & 0x0f) |
+					    (inb(DMA2_STAT_REG) & 0xf0);
+			for(i=1;i<5;i++) {
+				int dma = dmatab[i];
+				if(test_bit(dma,&dma_channels) || request_dma(dma,"ni6510"))
+					continue;
+					
+				flags=claim_dma_lock();
+				disable_dma(dma);
+				set_dma_mode(dma,DMA_MODE_CASCADE);
+				enable_dma(dma);
+				release_dma_lock(flags);
+				
+				ni65_init_lance(p,dev->dev_addr,0,0); /* trigger memory access */
+				
+				flags=claim_dma_lock();
+				disable_dma(dma);
+				free_dma(dma);
+				release_dma_lock(flags);
+				
+				if(readreg(CSR0) & CSR0_IDON)
+					break;
+			}
+			if(i == 5) {
+				printk("failed.\n");
+				printk(KERN_ERR "%s: Can't detect DMA channel!\n", dev->name);
+				ni65_free_buffer(p);
+				release_region(ioaddr, cards[p->cardno].total_size);
+				return -EAGAIN;
+			}
+			dev->dma = dmatab[i];
+			printk("DMA %d (autodetected), ",dev->dma);
+		}
+		else
+			printk("DMA %d (assigned), ",dev->dma);
+
+		if(dev->irq < 2)
+		{
+			unsigned long irq_mask;
+
+			ni65_init_lance(p,dev->dev_addr,0,0);
+			irq_mask = probe_irq_on();
+			writereg(CSR0_INIT|CSR0_INEA,CSR0); /* trigger interrupt */
+			msleep(20);
+			dev->irq = probe_irq_off(irq_mask);
+			if(!dev->irq)
+			{
+				printk("Failed to detect IRQ line!\n");
+				ni65_free_buffer(p);
+				release_region(ioaddr, cards[p->cardno].total_size);
+				return -EAGAIN;
+			}
+			printk("IRQ %d (autodetected).\n",dev->irq);
+		}
+		else
+			printk("IRQ %d (assigned).\n",dev->irq);
+	}
+
+	if(request_dma(dev->dma, cards[p->cardno].cardname ) != 0)
+	{
+		printk(KERN_ERR "%s: Can't request dma-channel %d\n",dev->name,(int) dev->dma);
+		ni65_free_buffer(p);
+		release_region(ioaddr, cards[p->cardno].total_size);
+		return -EAGAIN;
+	}
+
+	dev->base_addr = ioaddr;
+	SET_MODULE_OWNER(dev);
+	dev->open		= ni65_open;
+	dev->stop		= ni65_close;
+	dev->hard_start_xmit	= ni65_send_packet;
+	dev->tx_timeout		= ni65_timeout;
+	dev->watchdog_timeo	= HZ/2;
+	dev->get_stats		= ni65_get_stats;
+	dev->set_multicast_list = set_multicast_list;
+	return 0; /* everything is OK */
+}
+
+/*
+ * set lance register and trigger init
+ */
+static void ni65_init_lance(struct priv *p,unsigned char *daddr,int filter,int mode)
+{
+	int i;
+	u32 pib;
+
+	writereg(CSR0_CLRALL|CSR0_STOP,CSR0);
+
+	for(i=0;i<6;i++)
+		p->ib.eaddr[i] = daddr[i];
+
+	for(i=0;i<8;i++)
+		p->ib.filter[i] = filter;
+	p->ib.mode = mode;
+
+	p->ib.trp = (u32) isa_virt_to_bus(p->tmdhead) | TMDNUMMASK;
+	p->ib.rrp = (u32) isa_virt_to_bus(p->rmdhead) | RMDNUMMASK;
+	writereg(0,CSR3);	/* busmaster/no word-swap */
+	pib = (u32) isa_virt_to_bus(&p->ib);
+	writereg(pib & 0xffff,CSR1);
+	writereg(pib >> 16,CSR2);
+
+	writereg(CSR0_INIT,CSR0); /* this changes L_ADDRREG to CSR0 */
+
+	for(i=0;i<32;i++)
+	{
+		mdelay(4);
+		if(inw(PORT+L_DATAREG) & (CSR0_IDON | CSR0_MERR) )
+			break; /* init ok ? */
+	}
+}
+
+/*
+ * allocate memory area and check the 16MB border
+ */
+static void *ni65_alloc_mem(struct net_device *dev,char *what,int size,int type)
+{
+	struct sk_buff *skb=NULL;
+	unsigned char *ptr;
+	void *ret;
+
+	if(type) {
+		ret = skb = alloc_skb(2+16+size,GFP_KERNEL|GFP_DMA);
+		if(!skb) {
+			printk(KERN_WARNING "%s: unable to allocate %s memory.\n",dev->name,what);
+			return NULL;
+		}
+		skb->dev = dev;
+		skb_reserve(skb,2+16);
+		skb_put(skb,R_BUF_SIZE);	 /* grab the whole space .. (not necessary) */
+		ptr = skb->data;
+	}
+	else {
+		ret = ptr = kmalloc(T_BUF_SIZE,GFP_KERNEL | GFP_DMA);
+		if(!ret) {
+			printk(KERN_WARNING "%s: unable to allocate %s memory.\n",dev->name,what);
+			return NULL;
+		}
+	}
+	if( (u32) virt_to_phys(ptr+size) > 0x1000000) {
+		printk(KERN_WARNING "%s: unable to allocate %s memory in lower 16MB!\n",dev->name,what);
+		if(type)
+			kfree_skb(skb);
+		else
+			kfree(ptr);
+		return NULL;
+	}
+	return ret;
+}
+
+/*
+ * allocate all memory structures .. send/recv buffers etc ...
+ */
+static int ni65_alloc_buffer(struct net_device *dev)
+{
+	unsigned char *ptr;
+	struct priv *p;
+	int i;
+
+	/*
+	 * we need 8-aligned memory ..
+	 */
+	ptr = ni65_alloc_mem(dev,"BUFFER",sizeof(struct priv)+8,0);
+	if(!ptr)
+		return -ENOMEM;
+
+	p = dev->priv = (struct priv *) (((unsigned long) ptr + 7) & ~0x7);
+	memset((char *) dev->priv,0,sizeof(struct priv));
+	p->self = ptr;
+
+	for(i=0;i<TMDNUM;i++)
+	{
+#ifdef XMT_VIA_SKB
+		p->tmd_skb[i] = NULL;
+#endif
+		p->tmdbounce[i] = ni65_alloc_mem(dev,"XMIT",T_BUF_SIZE,0);
+		if(!p->tmdbounce[i]) {
+			ni65_free_buffer(p);
+			return -ENOMEM;
+		}
+	}
+
+	for(i=0;i<RMDNUM;i++)
+	{
+#ifdef RCV_VIA_SKB
+		p->recv_skb[i] = ni65_alloc_mem(dev,"RECV",R_BUF_SIZE,1);
+		if(!p->recv_skb[i]) {
+			ni65_free_buffer(p);
+			return -ENOMEM;
+		}
+#else
+		p->recvbounce[i] = ni65_alloc_mem(dev,"RECV",R_BUF_SIZE,0);
+		if(!p->recvbounce[i]) {
+			ni65_free_buffer(p);
+			return -ENOMEM;
+		}
+#endif
+	}
+
+	return 0; /* everything is OK */
+}
+
+/*
+ * free buffers and private struct
+ */
+static void ni65_free_buffer(struct priv *p)
+{
+	int i;
+
+	if(!p)
+		return;
+
+	for(i=0;i<TMDNUM;i++) {
+		if(p->tmdbounce[i])
+			kfree(p->tmdbounce[i]);
+#ifdef XMT_VIA_SKB
+		if(p->tmd_skb[i])
+			dev_kfree_skb(p->tmd_skb[i]);
+#endif
+	}
+
+	for(i=0;i<RMDNUM;i++)
+	{
+#ifdef RCV_VIA_SKB
+		if(p->recv_skb[i])
+			dev_kfree_skb(p->recv_skb[i]);
+#else
+		if(p->recvbounce[i])
+			kfree(p->recvbounce[i]);
+#endif
+	}
+	if(p->self)
+		kfree(p->self);
+}
+
+
+/*
+ * stop and (re)start lance .. e.g after an error
+ */
+static void ni65_stop_start(struct net_device *dev,struct priv *p)
+{
+	int csr0 = CSR0_INEA;
+
+	writedatareg(CSR0_STOP);
+
+	if(debuglevel > 1)
+		printk(KERN_DEBUG "ni65_stop_start\n");
+
+	if(p->features & INIT_RING_BEFORE_START) {
+		int i;
+#ifdef XMT_VIA_SKB
+		struct sk_buff *skb_save[TMDNUM];
+#endif
+		unsigned long buffer[TMDNUM];
+		short blen[TMDNUM];
+
+		if(p->xmit_queued) {
+			while(1) {
+				if((p->tmdhead[p->tmdlast].u.s.status & XMIT_OWN))
+					break;
+				p->tmdlast = (p->tmdlast + 1) & (TMDNUM-1);
+				if(p->tmdlast == p->tmdnum)
+					break;
+			}
+		}
+
+		for(i=0;i<TMDNUM;i++) {
+			struct tmd *tmdp = p->tmdhead + i;
+#ifdef XMT_VIA_SKB
+			skb_save[i] = p->tmd_skb[i];
+#endif
+			buffer[i] = (u32) isa_bus_to_virt(tmdp->u.buffer);
+			blen[i] = tmdp->blen;
+			tmdp->u.s.status = 0x0;
+		}
+
+		for(i=0;i<RMDNUM;i++) {
+			struct rmd *rmdp = p->rmdhead + i;
+			rmdp->u.s.status = RCV_OWN;
+		}
+		p->tmdnum = p->xmit_queued = 0;
+		writedatareg(CSR0_STRT | csr0);
+
+		for(i=0;i<TMDNUM;i++) {
+			int num = (i + p->tmdlast) & (TMDNUM-1);
+			p->tmdhead[i].u.buffer = (u32) isa_virt_to_bus((char *)buffer[num]); /* status is part of buffer field */
+			p->tmdhead[i].blen = blen[num];
+			if(p->tmdhead[i].u.s.status & XMIT_OWN) {
+				 p->tmdnum = (p->tmdnum + 1) & (TMDNUM-1);
+				 p->xmit_queued = 1;
+	 writedatareg(CSR0_TDMD | CSR0_INEA | csr0);
+			}
+#ifdef XMT_VIA_SKB
+			p->tmd_skb[i] = skb_save[num];
+#endif
+		}
+		p->rmdnum = p->tmdlast = 0;
+		if(!p->lock)
+			if (p->tmdnum || !p->xmit_queued)
+				netif_wake_queue(dev);
+		dev->trans_start = jiffies;
+	}
+	else
+		writedatareg(CSR0_STRT | csr0);
+}
+
+/*
+ * init lance (write init-values .. init-buffers) (open-helper)
+ */
+static int ni65_lance_reinit(struct net_device *dev)
+{
+	 int i;
+	 struct priv *p = (struct priv *) dev->priv;
+	 unsigned long flags;
+
+	 p->lock = 0;
+	 p->xmit_queued = 0;
+
+	 flags=claim_dma_lock();
+	 disable_dma(dev->dma); /* I've never worked with dma, but we do it like the packetdriver */
+	 set_dma_mode(dev->dma,DMA_MODE_CASCADE);
+	 enable_dma(dev->dma);
+	 release_dma_lock(flags);
+
+	 outw(inw(PORT+L_RESET),PORT+L_RESET); /* first: reset the card */
+	 if( (i=readreg(CSR0) ) != 0x4)
+	 {
+		 printk(KERN_ERR "%s: can't RESET %s card: %04x\n",dev->name,
+							cards[p->cardno].cardname,(int) i);
+		 flags=claim_dma_lock();
+		 disable_dma(dev->dma);
+		 release_dma_lock(flags);
+		 return 0;
+	 }
+
+	 p->rmdnum = p->tmdnum = p->tmdlast = p->tmdbouncenum = 0;
+	 for(i=0;i<TMDNUM;i++)
+	 {
+		 struct tmd *tmdp = p->tmdhead + i;
+#ifdef XMT_VIA_SKB
+		 if(p->tmd_skb[i]) {
+			 dev_kfree_skb(p->tmd_skb[i]);
+			 p->tmd_skb[i] = NULL;
+		 }
+#endif
+		 tmdp->u.buffer = 0x0;
+		 tmdp->u.s.status = XMIT_START | XMIT_END;
+		 tmdp->blen = tmdp->status2 = 0;
+	 }
+
+	 for(i=0;i<RMDNUM;i++)
+	 {
+		 struct rmd *rmdp = p->rmdhead + i;
+#ifdef RCV_VIA_SKB
+		 rmdp->u.buffer = (u32) isa_virt_to_bus(p->recv_skb[i]->data);
+#else
+		 rmdp->u.buffer = (u32) isa_virt_to_bus(p->recvbounce[i]);
+#endif
+		 rmdp->blen = -(R_BUF_SIZE-8);
+		 rmdp->mlen = 0;
+		 rmdp->u.s.status = RCV_OWN;
+	 }
+
+	 if(dev->flags & IFF_PROMISC)
+		 ni65_init_lance(p,dev->dev_addr,0x00,M_PROM);
+	 else if(dev->mc_count || dev->flags & IFF_ALLMULTI)
+		 ni65_init_lance(p,dev->dev_addr,0xff,0x0);
+	 else
+		 ni65_init_lance(p,dev->dev_addr,0x00,0x00);
+
+	/*
+	 * ni65_set_lance_mem() sets L_ADDRREG to CSR0
+	 * NOW, WE WILL NEVER CHANGE THE L_ADDRREG, CSR0 IS ALWAYS SELECTED
+	 */
+
+	 if(inw(PORT+L_DATAREG) & CSR0_IDON)	{
+		 ni65_set_performance(p);
+					 /* init OK: start lance , enable interrupts */
+		 writedatareg(CSR0_CLRALL | CSR0_INEA | CSR0_STRT);
+		 return 1; /* ->OK */
+	 }
+	 printk(KERN_ERR "%s: can't init lance, status: %04x\n",dev->name,(int) inw(PORT+L_DATAREG));
+	 flags=claim_dma_lock();
+	 disable_dma(dev->dma);
+	 release_dma_lock(flags);
+	 return 0; /* ->Error */
+}
+
+/*
+ * interrupt handler
+ */
+static irqreturn_t ni65_interrupt(int irq, void * dev_id, struct pt_regs * regs)
+{
+	int csr0 = 0;
+	struct net_device *dev = dev_id;
+	struct priv *p;
+	int bcnt = 32;
+
+	p = (struct priv *) dev->priv;
+
+	spin_lock(&p->ring_lock);
+	
+	while(--bcnt) {
+		csr0 = inw(PORT+L_DATAREG);
+
+#if 0
+		writedatareg( (csr0 & CSR0_CLRALL) ); /* ack interrupts, disable int. */
+#else
+		writedatareg( (csr0 & CSR0_CLRALL) | CSR0_INEA ); /* ack interrupts, interrupts enabled */
+#endif
+
+		if(!(csr0 & (CSR0_ERR | CSR0_RINT | CSR0_TINT)))
+			break;
+
+		if(csr0 & CSR0_RINT) /* RECV-int? */
+			ni65_recv_intr(dev,csr0);
+		if(csr0 & CSR0_TINT) /* XMIT-int? */
+			ni65_xmit_intr(dev,csr0);
+
+		if(csr0 & CSR0_ERR)
+		{
+			struct priv *p = (struct priv *) dev->priv;
+			if(debuglevel > 1)
+				printk(KERN_ERR "%s: general error: %04x.\n",dev->name,csr0);
+			if(csr0 & CSR0_BABL)
+				p->stats.tx_errors++;
+			if(csr0 & CSR0_MISS) {
+				int i;
+				for(i=0;i<RMDNUM;i++)
+					printk("%02x ",p->rmdhead[i].u.s.status);
+				printk("\n");
+				p->stats.rx_errors++;
+			}
+			if(csr0 & CSR0_MERR) {
+				if(debuglevel > 1)
+					printk(KERN_ERR "%s: Ooops .. memory error: %04x.\n",dev->name,csr0);
+				ni65_stop_start(dev,p);
+			}
+		}
+	}
+
+#ifdef RCV_PARANOIA_CHECK
+{
+ int j;
+ for(j=0;j<RMDNUM;j++)
+ {
+	struct priv *p = (struct priv *) dev->priv;
+	int i,k,num1,num2;
+	for(i=RMDNUM-1;i>0;i--) {
+		 num2 = (p->rmdnum + i) & (RMDNUM-1);
+		 if(!(p->rmdhead[num2].u.s.status & RCV_OWN))
+				break;
+	}
+
+	if(i) {
+		for(k=0;k<RMDNUM;k++) {
+			num1 = (p->rmdnum + k) & (RMDNUM-1);
+			if(!(p->rmdhead[num1].u.s.status & RCV_OWN))
+				break;
+		}
+		if(!k)
+			break;
+
+		if(debuglevel > 0)
+		{
+			char buf[256],*buf1;
+			int k;
+			buf1 = buf;
+			for(k=0;k<RMDNUM;k++) {
+				sprintf(buf1,"%02x ",(p->rmdhead[k].u.s.status)); /* & RCV_OWN) ); */
+				buf1 += 3;
+			}
+			*buf1 = 0;
+			printk(KERN_ERR "%s: Ooops, receive ring corrupted %2d %2d | %s\n",dev->name,p->rmdnum,i,buf);
+		}
+
+		p->rmdnum = num1;
+		ni65_recv_intr(dev,csr0);
+		if((p->rmdhead[num2].u.s.status & RCV_OWN))
+			break;	/* ok, we are 'in sync' again */
+	}
+	else
+		break;
+ }
+}
+#endif
+
+	if( (csr0 & (CSR0_RXON | CSR0_TXON)) != (CSR0_RXON | CSR0_TXON) ) {
+		printk(KERN_DEBUG "%s: RX or TX was offline -> restart\n",dev->name);
+		ni65_stop_start(dev,p);
+	}
+	else
+		writedatareg(CSR0_INEA);
+
+	spin_unlock(&p->ring_lock);
+	return IRQ_HANDLED;
+}
+
+/*
+ * We have received an Xmit-Interrupt ..
+ * send a new packet if necessary
+ */
+static void ni65_xmit_intr(struct net_device *dev,int csr0)
+{
+	struct priv *p = (struct priv *) dev->priv;
+
+	while(p->xmit_queued)
+	{
+		struct tmd *tmdp = p->tmdhead + p->tmdlast;
+		int tmdstat = tmdp->u.s.status;
+
+		if(tmdstat & XMIT_OWN)
+			break;
+
+		if(tmdstat & XMIT_ERR)
+		{
+#if 0
+			if(tmdp->status2 & XMIT_TDRMASK && debuglevel > 3)
+				printk(KERN_ERR "%s: tdr-problems (e.g. no resistor)\n",dev->name);
+#endif
+		 /* checking some errors */
+			if(tmdp->status2 & XMIT_RTRY)
+				p->stats.tx_aborted_errors++;
+			if(tmdp->status2 & XMIT_LCAR)
+				p->stats.tx_carrier_errors++;
+			if(tmdp->status2 & (XMIT_BUFF | XMIT_UFLO )) {
+		/* this stops the xmitter */
+				p->stats.tx_fifo_errors++;
+				if(debuglevel > 0)
+					printk(KERN_ERR "%s: Xmit FIFO/BUFF error\n",dev->name);
+				if(p->features & INIT_RING_BEFORE_START) {
+					tmdp->u.s.status = XMIT_OWN | XMIT_START | XMIT_END;	/* test: resend this frame */
+					ni65_stop_start(dev,p);
+					break;	/* no more Xmit processing .. */
+				}
+				else
+				 ni65_stop_start(dev,p);
+			}
+			if(debuglevel > 2)
+				printk(KERN_ERR "%s: xmit-error: %04x %02x-%04x\n",dev->name,csr0,(int) tmdstat,(int) tmdp->status2);
+			if(!(csr0 & CSR0_BABL)) /* don't count errors twice */
+				p->stats.tx_errors++;
+			tmdp->status2 = 0;
+		}
+		else {
+			p->stats.tx_bytes -= (short)(tmdp->blen);
+			p->stats.tx_packets++;
+		}
+
+#ifdef XMT_VIA_SKB
+		if(p->tmd_skb[p->tmdlast]) {
+			 dev_kfree_skb_irq(p->tmd_skb[p->tmdlast]);
+			 p->tmd_skb[p->tmdlast] = NULL;
+		}
+#endif
+
+		p->tmdlast = (p->tmdlast + 1) & (TMDNUM-1);
+		if(p->tmdlast == p->tmdnum)
+			p->xmit_queued = 0;
+	}
+	netif_wake_queue(dev);
+}
+
+/*
+ * We have received a packet
+ */
+static void ni65_recv_intr(struct net_device *dev,int csr0)
+{
+	struct rmd *rmdp;
+	int rmdstat,len;
+	int cnt=0;
+	struct priv *p = (struct priv *) dev->priv;
+
+	rmdp = p->rmdhead + p->rmdnum;
+	while(!( (rmdstat = rmdp->u.s.status) & RCV_OWN))
+	{
+		cnt++;
+		if( (rmdstat & (RCV_START | RCV_END | RCV_ERR)) != (RCV_START | RCV_END) ) /* error or oversized? */
+		{
+			if(!(rmdstat & RCV_ERR)) {
+				if(rmdstat & RCV_START)
+				{
+					p->stats.rx_length_errors++;
+					printk(KERN_ERR "%s: recv, packet too long: %d\n",dev->name,rmdp->mlen & 0x0fff);
+				}
+			}
+			else {
+				if(debuglevel > 2)
+					printk(KERN_ERR "%s: receive-error: %04x, lance-status: %04x/%04x\n",
+									dev->name,(int) rmdstat,csr0,(int) inw(PORT+L_DATAREG) );
+				if(rmdstat & RCV_FRAM)
+					p->stats.rx_frame_errors++;
+				if(rmdstat & RCV_OFLO)
+					p->stats.rx_over_errors++;
+				if(rmdstat & RCV_CRC)
+					p->stats.rx_crc_errors++;
+				if(rmdstat & RCV_BUF_ERR)
+					p->stats.rx_fifo_errors++;
+			}
+			if(!(csr0 & CSR0_MISS)) /* don't count errors twice */
+				p->stats.rx_errors++;
+		}
+		else if( (len = (rmdp->mlen & 0x0fff) - 4) >= 60)
+		{
+#ifdef RCV_VIA_SKB
+			struct sk_buff *skb = alloc_skb(R_BUF_SIZE+2+16,GFP_ATOMIC);
+			if (skb)
+				skb_reserve(skb,16);
+#else
+			struct sk_buff *skb = dev_alloc_skb(len+2);
+#endif
+			if(skb)
+			{
+				skb_reserve(skb,2);
+	skb->dev = dev;
+#ifdef RCV_VIA_SKB
+				if( (unsigned long) (skb->data + R_BUF_SIZE) > 0x1000000) {
+					skb_put(skb,len);
+					eth_copy_and_sum(skb, (unsigned char *)(p->recv_skb[p->rmdnum]->data),len,0);
+				}
+				else {
+					struct sk_buff *skb1 = p->recv_skb[p->rmdnum];
+					skb_put(skb,R_BUF_SIZE);
+					p->recv_skb[p->rmdnum] = skb;
+					rmdp->u.buffer = (u32) isa_virt_to_bus(skb->data);
+					skb = skb1;
+					skb_trim(skb,len);
+				}
+#else
+				skb_put(skb,len);
+				eth_copy_and_sum(skb, (unsigned char *) p->recvbounce[p->rmdnum],len,0);
+#endif
+				p->stats.rx_packets++;
+				p->stats.rx_bytes += len;
+				skb->protocol=eth_type_trans(skb,dev);
+				netif_rx(skb);
+				dev->last_rx = jiffies;
+			}
+			else
+			{
+				printk(KERN_ERR "%s: can't alloc new sk_buff\n",dev->name);
+				p->stats.rx_dropped++;
+			}
+		}
+		else {
+			printk(KERN_INFO "%s: received runt packet\n",dev->name);
+			p->stats.rx_errors++;
+		}
+		rmdp->blen = -(R_BUF_SIZE-8);
+		rmdp->mlen = 0;
+		rmdp->u.s.status = RCV_OWN; /* change owner */
+		p->rmdnum = (p->rmdnum + 1) & (RMDNUM-1);
+		rmdp = p->rmdhead + p->rmdnum;
+	}
+}
+
+/*
+ * kick xmitter ..
+ */
+ 
+static void ni65_timeout(struct net_device *dev)
+{
+	int i;
+	struct priv *p = (struct priv *) dev->priv;
+
+	printk(KERN_ERR "%s: xmitter timed out, try to restart!\n",dev->name);
+	for(i=0;i<TMDNUM;i++)
+		printk("%02x ",p->tmdhead[i].u.s.status);
+	printk("\n");
+	ni65_lance_reinit(dev);
+	dev->trans_start = jiffies;
+	netif_wake_queue(dev);
+}
+
+/*
+ *	Send a packet
+ */
+
+static int ni65_send_packet(struct sk_buff *skb, struct net_device *dev)
+{
+	struct priv *p = (struct priv *) dev->priv;
+
+	netif_stop_queue(dev);
+	
+	if (test_and_set_bit(0, (void*)&p->lock)) {
+		printk(KERN_ERR "%s: Queue was locked.\n", dev->name);
+		return 1;
+	}
+
+	{
+		short len = ETH_ZLEN < skb->len ? skb->len : ETH_ZLEN;
+		struct tmd *tmdp;
+		unsigned long flags;
+
+#ifdef XMT_VIA_SKB
+		if( (unsigned long) (skb->data + skb->len) > 0x1000000) {
+#endif
+
+			memcpy((char *) p->tmdbounce[p->tmdbouncenum] ,(char *)skb->data,
+							 (skb->len > T_BUF_SIZE) ? T_BUF_SIZE : skb->len);
+			if (len > skb->len)
+				memset((char *)p->tmdbounce[p->tmdbouncenum]+skb->len, 0, len-skb->len);
+			dev_kfree_skb (skb);
+
+			spin_lock_irqsave(&p->ring_lock, flags);
+			tmdp = p->tmdhead + p->tmdnum;
+			tmdp->u.buffer = (u32) isa_virt_to_bus(p->tmdbounce[p->tmdbouncenum]);
+			p->tmdbouncenum = (p->tmdbouncenum + 1) & (TMDNUM - 1);
+
+#ifdef XMT_VIA_SKB
+		}
+		else {
+			spin_lock_irqsave(&p->ring_lock, flags);
+
+			tmdp = p->tmdhead + p->tmdnum;
+			tmdp->u.buffer = (u32) isa_virt_to_bus(skb->data);
+			p->tmd_skb[p->tmdnum] = skb;
+		}
+#endif
+		tmdp->blen = -len;
+
+		tmdp->u.s.status = XMIT_OWN | XMIT_START | XMIT_END;
+		writedatareg(CSR0_TDMD | CSR0_INEA); /* enable xmit & interrupt */
+
+		p->xmit_queued = 1;
+		p->tmdnum = (p->tmdnum + 1) & (TMDNUM-1);
+
+		if(p->tmdnum != p->tmdlast)
+			netif_wake_queue(dev);
+			
+		p->lock = 0;
+		dev->trans_start = jiffies;
+		
+		spin_unlock_irqrestore(&p->ring_lock, flags);
+	}
+
+	return 0;
+}
+
+static struct net_device_stats *ni65_get_stats(struct net_device *dev)
+{
+
+#if 0
+	int i;
+	struct priv *p = (struct priv *) dev->priv;
+	for(i=0;i<RMDNUM;i++)
+	{
+		struct rmd *rmdp = p->rmdhead + ((p->rmdnum + i) & (RMDNUM-1));
+		printk("%02x ",rmdp->u.s.status);
+	}
+	printk("\n");
+#endif
+
+	return &((struct priv *) dev->priv)->stats;
+}
+
+static void set_multicast_list(struct net_device *dev)
+{
+	if(!ni65_lance_reinit(dev))
+		printk(KERN_ERR "%s: Can't switch card into MC mode!\n",dev->name);
+	netif_wake_queue(dev);
+}
+
+#ifdef MODULE
+static struct net_device *dev_ni65;
+
+module_param(irq, int, 0);
+module_param(io, int, 0);
+module_param(dma, int, 0);
+MODULE_PARM_DESC(irq, "ni6510 IRQ number (ignored for some cards)");
+MODULE_PARM_DESC(io, "ni6510 I/O base address");
+MODULE_PARM_DESC(dma, "ni6510 ISA DMA channel (ignored for some cards)");
+
+int init_module(void)
+{
+ 	dev_ni65 = ni65_probe(-1);
+	return IS_ERR(dev_ni65) ? PTR_ERR(dev_ni65) : 0;
+}
+
+void cleanup_module(void)
+{
+ 	unregister_netdev(dev_ni65);
+ 	cleanup_card(dev_ni65);
+ 	free_netdev(dev_ni65);
+}
+#endif /* MODULE */
+
+MODULE_LICENSE("GPL");
+
+/*
+ * END of ni65.c
+ */