Initial source

1 files changed, 648 insertions, 0 deletions

diff --git a/i386/i386at/gpl/linux/net/ni65.c b/i386/i386at/gpl/linux/net/ni65.c
new file mode 100644
index 0000000..44a5811
--- /dev/null
+++ b/i386/i386at/gpl/linux/net/ni65.c
@@ -0,0 +1,648 @@
+/*
+ * ni6510 (am7990 'lance' chip) driver for Linux-net-3 by MH
+ * Alphacode v0.33 (94/08/22) for 1.1.47 (or later)
+ *
+ * ----------------------------------------------------------
+ * WARNING: DOESN'T WORK ON MACHINES WITH MORE THAN 16MB !!!!
+ * ----------------------------------------------------------
+ *
+ * copyright (c) 1994 M.Hipp
+ *
+ * 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: mhipp@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
+ */
+
+/*
+ * Nov.18: multicast tweaked (AC).
+ *
+ * Aug.22: changes in xmit_intr (ack more than one xmitted-packet), ni65_send_packet (p->lock) (MH)
+ *
+ * July.16: fixed bugs in recv_skb and skb-alloc stuff  (MH)
+ */
+
+/*
+ * known BUGS: 16MB limit
+ */
+
+#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 <asm/bitops.h>
+#include <asm/io.h>
+#include <asm/dma.h>
+
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/skbuff.h>
+
+#include "ni65.h"
+
+/************************************
+ * skeleton-stuff
+ */
+
+#ifndef HAVE_PORTRESERVE
+#define check_region(ioaddr, size)              0
+#define request_region(ioaddr, size,name)       do ; while (0)
+#endif
+
+#ifndef NET_DEBUG
+#define NET_DEBUG 2
+#endif
+/*
+static unsigned int net_debug = NET_DEBUG;
+*/
+
+#define NI65_TOTAL_SIZE    16
+
+#define SA_ADDR0 0x02
+#define SA_ADDR1 0x07
+#define SA_ADDR2 0x01
+#define CARD_ID0 0x00
+#define CARD_ID1 0x55
+
+/*****************************************/
+
+#define PORT dev->base_addr
+
+#define RMDNUM 8
+#define RMDNUMMASK 0x6000 /* log2(RMDNUM)<<13 */
+#define TMDNUM 4
+#define TMDNUMMASK 0x4000 /* log2(TMDNUM)<<13 */
+
+#define R_BUF_SIZE 1518
+#define T_BUF_SIZE 1518
+
+#define MEMSIZE 8+RMDNUM*8+TMDNUM*8
+
+#define L_DATAREG 0x00
+#define L_ADDRREG 0x02
+
+#define L_RESET   0x04
+#define L_CONFIG  0x05
+#define L_EBASE   0x08
+
+/* 
+ * to access the 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
+
+/* if you #define NO_STATIC the driver is faster but you will have (more) problems with >16MB memory */
+#undef NO_STATIC
+
+#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))
+#define writedatareg(val) {outw(val,PORT+L_DATAREG);inw(PORT+L_DATAREG);}
+
+static int   ni65_probe1(struct device *dev,int);
+static void  ni65_interrupt(int irq, struct pt_regs *regs);
+  static void recv_intr(struct device *dev);
+  static void xmit_intr(struct device *dev);
+static int   ni65_open(struct device *dev);
+   static int am7990_reinit(struct device *dev);
+static int   ni65_send_packet(struct sk_buff *skb, struct device *dev);
+static int   ni65_close(struct device *dev);
+static struct enet_statistics *ni65_get_stats(struct device *);
+
+static void set_multicast_list(struct device *dev);
+
+struct priv 
+{
+  struct init_block ib; 
+  void *memptr;
+  struct rmd *rmdhead;
+  struct tmd *tmdhead;
+  int rmdnum;
+  int tmdnum,tmdlast;
+  struct sk_buff *recv_skb[RMDNUM];
+  void *tmdbufs[TMDNUM];
+  int lock,xmit_queued;
+  struct enet_statistics stats;
+}; 
+
+int irqtab[] = { 9,12,15,5 }; /* irq config-translate */
+int dmatab[] = { 0,3,5,6 };   /* dma config-translate */
+
+/*
+ * open (most done by init) 
+ */
+
+static int ni65_open(struct device *dev)
+{
+  if(am7990_reinit(dev))
+  {
+    dev->tbusy     = 0;
+    dev->interrupt = 0;
+    dev->start     = 1;
+    return 0;
+  }
+  else
+  {
+    dev->start = 0;
+    return -EAGAIN;
+  }
+}
+
+static int ni65_close(struct device *dev)
+{
+  outw(0,PORT+L_RESET); /* that's the hard way */
+  dev->tbusy = 1;
+  dev->start = 0;
+  return 0; 
+}
+
+/* 
+ * Probe The Card (not the lance-chip) 
+ * and set hardaddress
+ */ 
+
+int ni65_probe(struct device *dev)
+{
+  int *port, ports[] = {0x300,0x320,0x340,0x360, 0};
+  int base_addr = dev->base_addr;
+
+  if (base_addr > 0x1ff)          /* Check a single specified location. */
+     return ni65_probe1(dev, base_addr);
+  else if (base_addr > 0)         /* Don't probe at all. */
+     return ENXIO;
+
+  for (port = ports; *port; port++) 
+  {
+    int ioaddr = *port;
+    if (check_region(ioaddr, NI65_TOTAL_SIZE))
+       continue;
+    if( !(inb(ioaddr+L_EBASE+6) == CARD_ID0) || 
+        !(inb(ioaddr+L_EBASE+7) == CARD_ID1) )
+       continue;
+    dev->base_addr = ioaddr;
+    if (ni65_probe1(dev, ioaddr) == 0)
+       return 0;
+  }
+
+  dev->base_addr = base_addr;
+  return ENODEV;
+}
+
+
+static int ni65_probe1(struct device *dev,int ioaddr)
+{
+  int i;
+  unsigned char station_addr[6];
+  struct priv *p; 
+
+  for(i=0;i<6;i++)
+    station_addr[i] = dev->dev_addr[i] = inb(PORT+L_EBASE+i);
+
+  if(station_addr[0] != SA_ADDR0 || station_addr[1] != SA_ADDR1)
+  {
+    printk("%s: wrong Hardaddress \n",dev->name);
+    return ENODEV;
+  }
+
+  if(dev->irq == 0) 
+    dev->irq = irqtab[(inw(PORT+L_CONFIG)>>2)&3];
+  if(dev->dma == 0)  
+    dev->dma = dmatab[inw(PORT+L_CONFIG)&3];
+
+  printk("%s: %s found at %#3lx, IRQ %d DMA %d.\n", dev->name,
+           "network card", dev->base_addr, dev->irq,dev->dma);
+
+  {        
+    int irqval = request_irq(dev->irq, &ni65_interrupt,0,"ni65");
+    if (irqval) {
+      printk ("%s: unable to get IRQ %d (irqval=%d).\n", 
+                dev->name,dev->irq, irqval);
+      return EAGAIN;
+    }
+    if(request_dma(dev->dma, "ni65") != 0)
+    {
+      printk("%s: Can't request dma-channel %d\n",dev->name,(int) dev->dma);
+      free_irq(dev->irq);
+      return EAGAIN;
+    }
+  }
+  irq2dev_map[dev->irq] = dev;
+
+  /* Grab the region so we can find another board if autoIRQ fails. */
+        request_region(ioaddr,NI65_TOTAL_SIZE,"ni65");
+
+  p = dev->priv = (void *) kmalloc(sizeof(struct priv),GFP_KERNEL);
+  if (p == NULL)
+   	return -ENOMEM;
+  memset((char *) dev->priv,0,sizeof(struct priv));
+
+  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->flags 	     &= ~IFF_MULTICAST;
+  dev->interrupt      = 0;
+  dev->tbusy          = 0;
+  dev->start          = 0;
+
+  if( (p->memptr = kmalloc(MEMSIZE,GFP_KERNEL)) == NULL) {
+    printk("%s: Can't alloc TMD/RMD-buffer.\n",dev->name);
+    return EAGAIN;
+  }
+  if( (unsigned long) (p->memptr + MEMSIZE) & 0xff000000) {
+    printk("%s: Can't alloc TMD/RMD buffer in lower 16MB!\n",dev->name);
+    return EAGAIN;
+  }
+  p->tmdhead = (struct tmd *) ((( (unsigned long)p->memptr ) + 8) & 0xfffffff8);
+  p->rmdhead = (struct rmd *) (p->tmdhead + TMDNUM);   
+
+#ifndef NO_STATIC
+   for(i=0;i<TMDNUM;i++)
+   {
+     if( (p->tmdbufs[i] = kmalloc(T_BUF_SIZE,GFP_ATOMIC)) == NULL) {
+       printk("%s: Can't alloc Xmit-Mem.\n",dev->name);
+       return EAGAIN;
+     }
+     if( (unsigned long) (p->tmdbufs[i]+T_BUF_SIZE) & 0xff000000) {
+       printk("%s: Can't alloc Xmit-Mem in lower 16MB!\n",dev->name);
+       return EAGAIN;
+     }
+   }
+#endif
+
+   for(i=0;i<RMDNUM;i++)
+   {
+     if( (p->recv_skb[i] = dev_alloc_skb(R_BUF_SIZE)) == NULL) {
+       printk("%s: unable to alloc recv-mem\n",dev->name);
+       return EAGAIN;
+     }
+     if( (unsigned long) (p->recv_skb[i]->data + R_BUF_SIZE) & 0xff000000) {
+       printk("%s: unable to alloc receive-memory in lower 16MB!\n",dev->name);
+       return EAGAIN;
+     }
+   }
+
+  return 0; /* we've found everything */
+}
+
+/* 
+ * init lance (write init-values .. init-buffers) (open-helper)
+ */
+
+static int am7990_reinit(struct device *dev)
+{
+   int i,j;
+   struct tmd *tmdp;
+   struct rmd *rmdp;
+   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(0,PORT+L_RESET); /* first: reset the card */
+   if(inw(PORT+L_DATAREG) != 0x4)
+   {
+     printk("%s: can't RESET ni6510 card: %04x\n",dev->name,(int) inw(PORT+L_DATAREG));
+     disable_dma(dev->dma);
+     free_dma(dev->dma);
+     free_irq(dev->irq);
+     return 0;
+   }
+
+   /* here: memset all buffs to zero */
+
+   memset(p->memptr,0,MEMSIZE);
+
+   p->tmdnum = 0; p->tmdlast = 0;
+   for(i=0;i<TMDNUM;i++)
+   {
+     tmdp = p->tmdhead + i;
+#ifndef NO_STATIC
+     tmdp->u.buffer = (unsigned long) p->tmdbufs[i];     
+#endif
+     tmdp->u.s.status = XMIT_START | XMIT_END;
+   }
+
+   p->rmdnum = 0;
+   for(i=0;i<RMDNUM;i++)
+   {
+     rmdp = p->rmdhead + i;
+     rmdp->u.buffer = (unsigned long) p->recv_skb[i]->data;
+     rmdp->u.s.status = RCV_OWN;
+     rmdp->blen = -R_BUF_SIZE;
+     rmdp->mlen = 0;
+   }
+   
+   for(i=0;i<6;i++)
+   {
+     p->ib.eaddr[i] = dev->dev_addr[i];
+   }
+   p->ib.mode = 0;
+   for(i=0;i<8;i++) 
+     p->ib.filter[i] = 0;
+   p->ib.trplow = (unsigned short) (( (unsigned long) p->tmdhead ) & 0xffff);
+   p->ib.trphigh = (unsigned short) ((( (unsigned long) p->tmdhead )>>16) & 0x00ff) | TMDNUMMASK; 
+   p->ib.rrplow = (unsigned short) (( (unsigned long) p->rmdhead ) & 0xffff);
+   p->ib.rrphigh = (unsigned short) ((( (unsigned long) p->rmdhead )>>16) & 0x00ff) | RMDNUMMASK;
+
+   writereg(0,CSR3);  /* busmaster/no word-swap */
+   writereg((unsigned short) (((unsigned long) &(p->ib)) & 0xffff),CSR1);
+   writereg((unsigned short) (((unsigned long) &(p->ib))>>16),CSR2);
+   
+   writereg(CSR0_INIT,CSR0); /* this changes L_ADDRREG to CSR0 */
+
+  /*
+   * NOW, WE NEVER WILL CHANGE THE L_ADDRREG, CSR0 IS ALWAYS SELECTED 
+   */
+
+    for(i=0;i<5;i++)
+    {
+      for(j=0;j<2000000;j++); /* wait a while */
+      if(inw(PORT+L_DATAREG) & CSR0_IDON) break; /* init ok ? */
+    }
+    if(i == 5) 
+    {
+      printk("%s: can't init am7990, status: %04x\n",dev->name,(int) inw(PORT+L_DATAREG));
+      disable_dma(dev->dma);
+      free_dma(dev->dma);
+      free_irq(dev->irq);
+      return 0; /* false */
+    } 
+
+    writedatareg(CSR0_CLRALL | CSR0_INEA | CSR0_STRT); /* start lance , enable interrupts */
+
+    return 1; /* OK */
+}
+ 
+/* 
+ * interrupt handler  
+ */
+
+static void ni65_interrupt(int irq, struct pt_regs * regs)
+{
+  int csr0;
+  struct device *dev = (struct device *) irq2dev_map[irq];
+
+  if (dev == NULL) {
+    printk ("net_interrupt(): irq %d for unknown device.\n", irq);
+    return;
+  }
+
+  csr0 = inw(PORT+L_DATAREG);
+  writedatareg(csr0 & CSR0_CLRALL); /* ack interrupts, disable int. */
+
+  dev->interrupt = 1;
+
+  if(csr0 & CSR0_ERR)
+  {
+     struct priv *p = (struct priv *) dev->priv;
+
+     if(csr0 & CSR0_BABL)
+       p->stats.tx_errors++;
+     if(csr0 & CSR0_MISS)
+       p->stats.rx_errors++;
+  }
+
+  if(csr0 & CSR0_RINT) /* RECV-int? */
+  { 
+    recv_intr(dev);
+  }
+  if(csr0 & CSR0_TINT) /* XMIT-int? */
+  {  
+    xmit_intr(dev);
+  }
+
+  writedatareg(CSR0_INEA);  /* reenable inter. */
+  dev->interrupt = 0;
+
+  return;
+}
+
+/*
+ * We have received an Xmit-Interrupt ..
+ * send a new packet if necessary
+ */
+
+static void xmit_intr(struct device *dev)
+{
+  int tmdstat;
+  struct tmd *tmdp;
+  struct priv *p = (struct priv *) dev->priv;
+
+#ifdef NO_STATIC
+  struct sk_buff *skb;
+#endif
+
+  while(p->xmit_queued)
+  {
+    tmdp = p->tmdhead + p->tmdlast;
+    tmdstat = tmdp->u.s.status;
+    if(tmdstat & XMIT_OWN)
+      break;
+#ifdef NO_STATIC
+    skb = (struct sk_buff *) p->tmdbufs[p->tmdlast];
+    dev_kfree_skb(skb,FREE_WRITE); 
+#endif
+
+    if(tmdstat & XMIT_ERR)
+    {
+      printk("%s: xmit-error: %04x %04x\n",dev->name,(int) tmdstat,(int) tmdp->status2);
+      if(tmdp->status2 & XMIT_TDRMASK) 
+        printk("%s: tdr-problems (e.g. no resistor)\n",dev->name);
+
+     /* checking some errors */
+      if(tmdp->status2 & XMIT_RTRY) 
+        p->stats.tx_aborted_errors++;
+      if(tmdp->status2 & XMIT_LCAR) 
+        p->stats.tx_carrier_errors++;
+      p->stats.tx_errors++;
+      tmdp->status2 = 0;
+    }
+    else
+      p->stats.tx_packets++;
+
+    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 recv_intr(struct device *dev)
+{
+  struct rmd *rmdp; 
+  int rmdstat,len;
+  struct sk_buff *skb,*skb1;
+  struct priv *p = (struct priv *) dev->priv;
+
+  rmdp = p->rmdhead + p->rmdnum;
+  while(!( (rmdstat = rmdp->u.s.status) & RCV_OWN))
+  {
+    if( (rmdstat & (RCV_START | RCV_END)) != (RCV_START | RCV_END) ) /* is packet start & end? */ 
+    {
+      if(rmdstat & RCV_START)
+      {
+        p->stats.rx_errors++;
+        p->stats.rx_length_errors++;
+        printk("%s: packet too long\n",dev->name);
+      }
+      rmdp->u.s.status = RCV_OWN; /* change owner */
+    }
+    else if(rmdstat & RCV_ERR)
+    {
+      printk("%s: receive-error: %04x\n",dev->name,(int) rmdstat );
+      p->stats.rx_errors++;
+      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++;
+      rmdp->u.s.status = RCV_OWN;
+      printk("%s: lance-status: %04x\n",dev->name,(int) inw(PORT+L_DATAREG));
+    }
+    else
+    {
+      len = (rmdp->mlen & 0x0fff) - 4; /* -4: ignore FCS */
+      skb = dev_alloc_skb(R_BUF_SIZE);
+      if(skb != NULL)
+      {
+        if( (unsigned long) (skb->data + R_BUF_SIZE) & 0xff000000) {
+          memcpy(skb_put(skb,len),p->recv_skb[p->rmdnum]->data,len);
+	  skb1 = skb;
+        }
+        else {
+          skb1 = p->recv_skb[p->rmdnum];
+          p->recv_skb[p->rmdnum] = skb;
+          rmdp->u.buffer = (unsigned long) skb_put(skb1,len);
+        }
+        rmdp->u.s.status = RCV_OWN;
+        rmdp->mlen = 0;   /* not necc ???? */
+        skb1->dev = dev;
+        p->stats.rx_packets++;
+        skb1->protocol=eth_type_trans(skb1,dev);
+        netif_rx(skb1);
+      }
+      else
+      {
+        rmdp->u.s.status = RCV_OWN;
+        printk("%s: can't alloc new sk_buff\n",dev->name);
+        p->stats.rx_dropped++;
+      }
+    }
+    p->rmdnum++; p->rmdnum &= 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;
+  struct tmd *tmdp;
+
+  if(dev->tbusy)
+  {
+    int tickssofar = jiffies - dev->trans_start;
+    if (tickssofar < 25)
+      return 1;
+
+    printk("%s: xmitter timed out, try to restart!\n",dev->name);
+    am7990_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("%s: Transmitter access conflict.\n", dev->name);
+     return 1;
+  }
+  if(set_bit(0,(void*) &p->lock) != 0)
+  {
+    printk("%s: Queue was locked!\n",dev->name);
+    return 1;
+  }
+
+  {
+    short len = ETH_ZLEN < skb->len ? skb->len : ETH_ZLEN;
+
+    tmdp = p->tmdhead + p->tmdnum;
+
+#ifdef NO_STATIC
+    tmdp->u.buffer = (unsigned long) (skb->data);
+    p->tmdbufs[p->tmdnum] = skb;
+#else
+    memcpy((char *) (tmdp->u.buffer & 0x00ffffff),(char *)skb->data,skb->len);
+    dev_kfree_skb (skb, FREE_WRITE);
+#endif
+    tmdp->blen = -len;
+    tmdp->u.s.status = XMIT_OWN | XMIT_START | XMIT_END;
+
+    cli();
+    p->xmit_queued = 1;
+    writedatareg(CSR0_TDMD | CSR0_INEA); /* enable xmit & interrupt */
+    p->tmdnum++; p->tmdnum &= TMDNUM-1;
+ 
+    if( !((p->tmdhead + p->tmdnum)->u.s.status & XMIT_OWN) ) 
+      dev->tbusy = 0;
+    p->lock = 0;
+    sti();
+
+    dev->trans_start = jiffies;
+
+  }
+
+  return 0;
+}
+
+static struct enet_statistics *ni65_get_stats(struct device *dev)
+{
+  return &((struct priv *) dev->priv)->stats;
+}
+
+static void set_multicast_list(struct device *dev)
+{
+}
+
+/*
+ * END of ni65.c 
+ */
+