1998-11-30 OKUJI Yoshinori <okuji@kuicr.kyoto-u.ac.jp>

	Clean up linux emulation code to make it architecture-independent
	as much as possible.

	* linux: Renamed from linuxdev.
	* Makefile.in (objfiles): Add linux.o instead of linuxdev.o.
	(MAKE): New variable. Used for the linux.o target.
	* configure.in: Add AC_CHECK_TOOL(MAKE, make).
	* i386/i386/spl.h: Include <i386/ipl.h>, for compatibility with
	OSF Mach 3.0. Suggested by Elgin Lee <ehl@funghi.com>.
	* linux/src: Renamed from linux/linux.
	* linux/dev: Renamed from linux/mach.
	* linux/Drivers.in (AC_INIT): Use dev/include/linux/autoconf.h,
	instead of mach/include/linux/autoconf.h.
	* Makefile.in (all): Target ../linux.o instead of ../linuxdev.o.
	* linux/dev/drivers/block/genhd.c: Include <machine/spl.h> instead
	of <i386/ipl.h>.
	* linux/dev/drivers/net/auto_irq.c: Remove unneeded header files,
	<i386/ipl.h> and <i386/pic.h>.
	* linux/dev/init/main.c: Many i386-dependent codes moved to ...
	* linux/dev/arch/i386/irq.c: ... here.
	* linux/dev/arch/i386/setup.c: New file.
	* linux/dev/arch/i386/linux_emul.h: Likewise.
	* linux/dev/arch/i386/glue/timer.c: Merged into sched.c.
	* linux/dev/arch/i386/glue/sched.c: Include <machine/spl.h> instead
	of <i386/ipl.h>, and moved to ...
	* linux/dev/kernel/sched.c: ... here.
	* linux/dev/arch/i386/glue/block.c: Include <machine/spl.h> and
	<linux_emul.h>, instead of i386-dependent header files, and
	moved to ...
	* linux/dev/glue/blocl.c: ... here.
	* linux/dev/arch/i386/glue/net.c: Include <machine/spl.h> and
	<linux_emul.h>, instead of i386-dependent header files, and
	moved to ...
	* linux/dev/glue/net.c: ... here.
	* linux/dev/arch/i386/glue/misc.c: Remove `x86' and moved to ...
	* linux/dev/glue/misc.c: ... here.
	* linux/dev/arch/i386/glue/kmem.c: Moved to ...
	* linux/dev/glue/kmem.c: ... here.

1 files changed, 1228 insertions, 0 deletions

diff --git a/linux/src/drivers/net/ni65.c b/linux/src/drivers/net/ni65.c
new file mode 100644
index 0000000..75e8914
--- /dev/null
+++ b/linux/src/drivers/net/ni65.c
@@ -0,0 +1,1228 @@
+/*
+ * 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 Public License that covers the Linux-kernel.
+ *
+ * comments/bugs/suggestions can be sent to:
+ *   Michael Hipp
+ *   email: Michael.Hipp@student.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)
+ */
+
+/*
+ * 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/sched.h>
+#include <linux/string.h>
+#include <linux/ptrace.h>
+#include <linux/errno.h>
+#include <linux/ioport.h>
+#include <linux/malloc.h>
+#include <linux/interrupt.h>
+#include <linux/delay.h>
+#include <asm/bitops.h>
+#include <asm/io.h>
+#include <asm/dma.h>
+
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/skbuff.h>
+
+#include <linux/version.h>
+#include <linux/module.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;
+	unsigned char config;
+} cards[] = {
+	{ NI65_ID0,NI65_ID1,0x0e,0x10,0x0,0x8,ni_vendor,"ni6510", 0x1 } ,
+	{ NI65_EB_ID0,NI65_EB_ID1,0x0e,0x18,0x10,0x0,ni_vendor,"ni6510 EtherBlaster", 0x2 } ,
+	{ NE2100_ID0,NE2100_ID1,0x0e,0x18,0x10,0x0,NULL,"generic NE2100", 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 enet_statistics stats;
+  void *self;
+  int cmdr_addr;
+  int cardno;
+  int features;
+}; 
+
+static int  ni65_probe1(struct device *dev,int);
+static void ni65_interrupt(int irq, void * dev_id, struct pt_regs *regs);
+static void ni65_recv_intr(struct device *dev,int);
+static void ni65_xmit_intr(struct device *dev,int);
+static int  ni65_open(struct device *dev);
+static int  ni65_lance_reinit(struct device *dev);
+static void ni65_init_lance(struct priv *p,unsigned char*,int,int);
+static int  ni65_send_packet(struct sk_buff *skb, struct device *dev);
+static int  ni65_close(struct device *dev);
+static int  ni65_alloc_buffer(struct device *dev);
+static void ni65_free_buffer(struct priv *p);
+static struct enet_statistics *ni65_get_stats(struct device *);
+static void set_multicast_list(struct device *dev);
+
+static int irqtab[] = { 9,12,15,5 }; /* irq config-translate */
+static int dmatab[] = { 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 device *dev)
+{
+  struct priv *p = (struct priv *) dev->priv;
+  int irqval = request_irq(dev->irq, &ni65_interrupt,0,
+                        cards[p->cardno].cardname,NULL);
+  if (irqval) {
+    printk ("%s: unable to get IRQ %d (irqval=%d).\n", 
+              dev->name,dev->irq, irqval);
+    return -EAGAIN;
+  }
+  irq2dev_map[dev->irq] = dev;
+
+  if(ni65_lance_reinit(dev))
+  {
+    dev->tbusy     = 0;
+    dev->interrupt = 0;
+    dev->start     = 1;
+    MOD_INC_USE_COUNT;
+    return 0;
+  }
+  else
+  {
+    irq2dev_map[dev->irq] = NULL;
+    free_irq(dev->irq,NULL);
+    dev->start = 0;
+    return -EAGAIN;
+  }
+}
+
+/*
+ * close interface (down)
+ */
+static int ni65_close(struct device *dev)
+{
+  struct priv *p = (struct priv *) dev->priv;
+
+  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],FREE_WRITE);
+        p->tmd_skb[i] = NULL;
+      }
+    }
+  }
+#endif
+  irq2dev_map[dev->irq] = NULL;
+  free_irq(dev->irq,NULL);
+  dev->tbusy = 1;
+  dev->start = 0;
+  MOD_DEC_USE_COUNT;
+  return 0; 
+}
+
+/* 
+ * Probe The Card (not the lance-chip) 
+ */ 
+#ifdef MODULE
+static
+#endif
+int ni65_probe(struct device *dev)
+{
+  int *port;
+  static int ports[] = {0x360,0x300,0x320,0x340, 0};
+
+  if (dev->base_addr > 0x1ff)          /* Check a single specified location. */
+     return ni65_probe1(dev, dev->base_addr);
+  else if (dev->base_addr > 0)         /* Don't probe at all. */
+     return -ENXIO;
+
+  for (port = ports; *port; port++) 
+  {
+    if (ni65_probe1(dev, *port) == 0)
+       return 0;
+  }
+
+  return -ENODEV;
+}
+
+/*
+ * this is the real card probe .. 
+ */
+static int ni65_probe1(struct device *dev,int ioaddr)
+{
+  int i,j;
+  struct priv *p; 
+
+  for(i=0;i<NUM_CARDS;i++) {
+    if(check_region(ioaddr, cards[i].total_size))
+      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) {
+         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])
+          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)
+    return j;
+  p = (struct priv *) dev->priv;
+  p->cmdr_addr = ioaddr + cards[i].cmd_offset;
+  p->cardno = i;
+
+  printk("%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(KERN_ERR "can't RESET card: %04x\n",j);
+     ni65_free_buffer(p);
+     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 */
+      int 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;
+        disable_dma(dma);
+        set_dma_mode(dma,DMA_MODE_CASCADE);
+        enable_dma(dma);
+        ni65_init_lance(p,dev->dev_addr,0,0); /* trigger memory access */
+        disable_dma(dma);
+        free_dma(dma);
+        if(readreg(CSR0) & CSR0_IDON)
+          break;
+      }
+      if(i == 5) {
+        printk("Can't detect DMA channel!\n");
+        ni65_free_buffer(p);
+        return -EAGAIN;
+      }
+      dev->dma = dmatab[i];
+      printk("DMA %d (autodetected), ",dev->dma);
+    }
+    else
+      printk("DMA %d (assigned), ",dev->dma);
+
+    if(dev->irq < 2)
+    {
+      ni65_init_lance(p,dev->dev_addr,0,0);
+      autoirq_setup(0);
+      writereg(CSR0_INIT|CSR0_INEA,CSR0); /* trigger interrupt */
+
+      if(!(dev->irq = autoirq_report(2)))
+      {
+        printk("Failed to detect IRQ line!\n");
+        ni65_free_buffer(p);
+        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("%s: Can't request dma-channel %d\n",dev->name,(int) dev->dma);
+    ni65_free_buffer(p);
+    return -EAGAIN;
+  }
+
+  /* 
+   * Grab the region so we can find another board. 
+   */
+  request_region(ioaddr,cards[p->cardno].total_size,cards[p->cardno].cardname);
+
+  dev->base_addr = ioaddr;
+
+  dev->open               = ni65_open;
+  dev->stop               = ni65_close;
+  dev->hard_start_xmit    = ni65_send_packet;
+  dev->get_stats          = ni65_get_stats;
+  dev->set_multicast_list = set_multicast_list;
+
+  ether_setup(dev);
+
+  dev->interrupt      = 0;
+  dev->tbusy          = 0;
+  dev->start          = 0;
+
+  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) virt_to_bus(p->tmdhead) | TMDNUMMASK;
+  p->ib.rrp = (u32) virt_to_bus(p->rmdhead) | RMDNUMMASK;
+  writereg(0,CSR3);  /* busmaster/no word-swap */
+  pib = (u32) 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++)
+  {
+    udelay(4000);
+    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 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("%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("%s: unable to allocate %s memory.\n",dev->name,what);
+      return NULL;
+    }
+  }
+  if( (u32) virt_to_bus(ptr+size) > 0x1000000) {
+    printk("%s: unable to allocate %s memory in lower 16MB!\n",dev->name,what);
+    if(type)
+      kfree_skb(skb,FREE_WRITE);
+    else
+      kfree(ptr);
+    return NULL;
+  }
+  return ret;
+}
+
+/*
+ * allocate all memory structures .. send/recv buffers etc ...
+ */
+static int ni65_alloc_buffer(struct 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],FREE_WRITE);
+#endif
+  }
+
+  for(i=0;i<RMDNUM;i++)
+  {
+#ifdef RCV_VIA_SKB
+    if(p->recv_skb[i])
+      dev_kfree_skb(p->recv_skb[i],FREE_WRITE);
+#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 device *dev,struct priv *p)
+{
+  int csr0 = CSR0_INEA;
+
+  writedatareg(CSR0_STOP);
+
+  if(debuglevel > 1)
+    printk("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) 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) 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)
+      dev->tbusy = (p->tmdnum || !p->xmit_queued) ? 0 : 1;
+    dev->trans_start = jiffies;
+  } 
+  else
+    writedatareg(CSR0_STRT | csr0);
+}
+
+/* 
+ * init lance (write init-values .. init-buffers) (open-helper)
+ */
+static int ni65_lance_reinit(struct device *dev)
+{
+   int i;
+   struct priv *p = (struct priv *) dev->priv;
+
+   p->lock = 0;
+   p->xmit_queued = 0;
+
+   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); 
+
+   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);
+     disable_dma(dev->dma);
+     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],FREE_WRITE);
+       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) virt_to_bus(p->recv_skb[i]->data);
+#else
+     rmdp->u.buffer = (u32) 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));
+   disable_dma(dev->dma);
+   return 0; /* ->Error */
+}
+ 
+/* 
+ * interrupt handler  
+ */
+static void ni65_interrupt(int irq, void * dev_id, struct pt_regs * regs)
+{
+  int csr0;
+  struct device *dev = (struct device *) irq2dev_map[irq];
+  struct priv *p;
+  int bcnt = 32;
+
+  if (dev == NULL) {
+    printk (KERN_ERR "ni65_interrupt(): irq %d for unknown device.\n", irq);
+    return;
+  }
+
+  if(set_bit(0,(int *) &dev->interrupt)) {
+    printk("ni65: oops .. interrupt while proceeding interrupt\n");
+    return;
+  }
+  p = (struct priv *) dev->priv;
+
+  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("%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("%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("%s: RX or TX was offline -> restart\n",dev->name);
+    ni65_stop_start(dev,p);
+  }
+  else
+    writedatareg(CSR0_INEA);
+
+  dev->interrupt = 0;
+
+  return;
+}
+
+/*
+ * We have received an Xmit-Interrupt ..
+ * send a new packet if necessary
+ */
+static void ni65_xmit_intr(struct 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_packets++;
+
+#ifdef XMT_VIA_SKB
+    if(p->tmd_skb[p->tmdlast]) {
+       dev_kfree_skb(p->tmd_skb[p->tmdlast],FREE_WRITE);
+       p->tmd_skb[p->tmdlast] = NULL;
+    }
+#endif
+
+    p->tmdlast = (p->tmdlast + 1) & (TMDNUM-1);
+    if(p->tmdlast == p->tmdnum)
+      p->xmit_queued = 0;
+  }
+  dev->tbusy = 0;
+  mark_bh(NET_BH);
+}
+
+/*
+ * We have received a packet
+ */
+static void ni65_recv_intr(struct 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) 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++;
+        skb->protocol=eth_type_trans(skb,dev);
+        netif_rx(skb);
+      }
+      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 int ni65_send_packet(struct sk_buff *skb, struct device *dev)
+{
+  struct priv *p = (struct priv *) dev->priv;
+
+  if(dev->tbusy)
+  {
+    int tickssofar = jiffies - dev->trans_start;
+    if (tickssofar < 50)
+      return 1;
+
+    printk(KERN_ERR "%s: xmitter timed out, try to restart!\n",dev->name);
+{
+  int i;
+  for(i=0;i<TMDNUM;i++)
+    printk("%02x ",p->tmdhead[i].u.s.status);
+  printk("\n");
+}
+    ni65_lance_reinit(dev);
+    dev->tbusy=0;
+    dev->trans_start = jiffies;
+  }
+
+  if(skb == NULL) {
+    dev_tint(dev);
+    return 0;
+  }
+
+  if (skb->len <= 0)
+    return 0;
+
+  if (set_bit(0, (void*)&dev->tbusy) != 0) {
+     printk(KERN_ERR "%s: Transmitter access conflict.\n", dev->name);
+     return 1;
+  }
+  if (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;
+    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);
+      dev_kfree_skb (skb, FREE_WRITE);
+
+      save_flags(flags);
+      cli();
+
+      tmdp = p->tmdhead + p->tmdnum;
+      tmdp->u.buffer = (u32) virt_to_bus(p->tmdbounce[p->tmdbouncenum]);
+      p->tmdbouncenum = (p->tmdbouncenum + 1) & (TMDNUM - 1);
+
+#ifdef XMT_VIA_SKB
+    }
+    else {
+      save_flags(flags);
+      cli();
+ 
+      tmdp = p->tmdhead + p->tmdnum;
+      tmdp->u.buffer = (u32) 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);
+
+    dev->tbusy = (p->tmdnum == p->tmdlast) ? 1 : 0;
+    p->lock = 0;
+    dev->trans_start = jiffies;
+
+    restore_flags(flags);
+  }
+
+  return 0;
+}
+
+static struct enet_statistics *ni65_get_stats(struct 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 device *dev)
+{
+	if(!ni65_lance_reinit(dev))
+		printk(KERN_ERR "%s: Can't switch card into MC mode!\n",dev->name);
+	dev->tbusy = 0;
+}
+
+#ifdef MODULE
+static struct device dev_ni65 = {
+  "        ",  /* "ni6510": device name inserted by net_init.c */
+  0, 0, 0, 0,
+  0x360, 9,   /* I/O address, IRQ */
+  0, 0, 0, NULL, ni65_probe };
+
+/* set: io,irq,dma or set it when calling insmod */
+static int irq=0;
+static int io=0;
+static int dma=0;
+
+int init_module(void)
+{
+#if 0
+  if(io <= 0x0 || irq < 2) {
+    printk("ni65: Autoprobing not allowed for modules.\n");
+    printk("ni65: Set symbols 'io' 'irq' and 'dma'\n");
+    return -ENODEV;
+  }
+#endif
+  dev_ni65.irq = irq;
+  dev_ni65.dma = dma;
+  dev_ni65.base_addr = io;
+  if (register_netdev(&dev_ni65) != 0)
+    return -EIO;
+  return 0;
+}
+
+void cleanup_module(void)
+{
+  struct priv *p;
+  p = (struct priv *) dev_ni65.priv;
+  if(!p) {
+    printk("Ooops .. no privat struct\n");
+    return;
+  }
+  disable_dma(dev_ni65.dma);
+  free_dma(dev_ni65.dma);
+  release_region(dev_ni65.base_addr,cards[p->cardno].total_size);
+  ni65_free_buffer(p);
+  dev_ni65.priv = NULL;
+  unregister_netdev(&dev_ni65);
+}
+#endif /* MODULE */
+
+/*
+ * END of ni65.c 
+ */
+
+