patch-2.4.19 linux-2.4.19/drivers/net/sun3_82586.c

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diff -urN linux-2.4.18/drivers/net/sun3_82586.c linux-2.4.19/drivers/net/sun3_82586.c
@@ -0,0 +1,1206 @@
+/*
+ * Sun3 i82586 Ethernet driver
+ *
+ * Cloned from ni52.c for the Sun3 by Sam Creasey (sammy@sammy.net)
+ *
+ * Original copyright follows:
+ * --------------------------
+ *
+ * net-3-driver for the NI5210 card (i82586 Ethernet chip)
+ *
+ * This is an extension to the Linux operating system, and is covered by the
+ * same Gnu Public License that covers that work.
+ *
+ * Alphacode 0.82 (96/09/29) for Linux 2.0.0 (or later)
+ * Copyrights (c) 1994,1995,1996 by M.Hipp (hippm@informatik.uni-tuebingen.de)
+ * --------------------------
+ * 
+ * Consult ni52.c for further notes from the original driver.
+ *
+ * This incarnation currently supports the OBIO version of the i82586 chip 
+ * used in certain sun3 models.  It should be fairly doable to expand this
+ * to support VME if I should every acquire such a board.
+ *
+ */
+
+static int debuglevel = 0; /* debug-printk 0: off 1: a few 2: more */
+static int automatic_resume = 0; /* experimental .. better should be zero */
+static int rfdadd = 0; /* rfdadd=1 may be better for 8K MEM cards */
+static int fifo=0x8;	/* don't change */
+
+/* #define REALLY_SLOW_IO */
+
+#include <linux/module.h>
+#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 <asm/bitops.h>
+#include <asm/io.h>
+#include <asm/idprom.h>
+#include <asm/machines.h>
+#include <asm/sun3mmu.h>
+#include <asm/dvma.h>
+#include <asm/byteorder.h>
+
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/skbuff.h>
+
+#include "sun3_82586.h"
+
+#define DEBUG       /* debug on */
+#define SYSBUSVAL 0 /* 16 Bit */
+
+#define sun3_attn586()  {*(volatile unsigned char *)(dev->base_addr) |= IEOB_ATTEN; *(volatile unsigned char *)(dev->base_addr) &= ~IEOB_ATTEN;}
+#define sun3_reset586() {*(volatile unsigned char *)(dev->base_addr) = 0; udelay(100); *(volatile unsigned char *)(dev->base_addr) = IEOB_NORSET;}
+#define sun3_disint()   {*(volatile unsigned char *)(dev->base_addr) &= ~IEOB_IENAB;}
+#define sun3_enaint()   {*(volatile unsigned char *)(dev->base_addr) |= IEOB_IENAB;}
+#define sun3_active()   {*(volatile unsigned char *)(dev->base_addr) |= (IEOB_IENAB|IEOB_ONAIR|IEOB_NORSET);}
+
+#define make32(ptr16) (p->memtop + (swab16((unsigned short) (ptr16))) )
+#define make24(ptr32) (char *)swab32(( ((unsigned long) (ptr32)) - p->base))
+#define make16(ptr32) (swab16((unsigned short) ((unsigned long)(ptr32) - (unsigned long) p->memtop )))
+
+/******************* how to calculate the buffers *****************************
+
+  * IMPORTANT NOTE: if you configure only one NUM_XMIT_BUFFS, the driver works
+  * --------------- in a different (more stable?) mode. Only in this mode it's
+  *                 possible to configure the driver with 'NO_NOPCOMMANDS'
+
+sizeof(scp)=12; sizeof(scb)=16; sizeof(iscp)=8;
+sizeof(scp)+sizeof(iscp)+sizeof(scb) = 36 = INIT
+sizeof(rfd) = 24; sizeof(rbd) = 12;
+sizeof(tbd) = 8; sizeof(transmit_cmd) = 16;
+sizeof(nop_cmd) = 8;
+
+  * if you don't know the driver, better do not change these values: */
+
+#define RECV_BUFF_SIZE 1536 /* slightly oversized */
+#define XMIT_BUFF_SIZE 1536 /* slightly oversized */
+#define NUM_XMIT_BUFFS 1    /* config for 32K shmem */
+#define NUM_RECV_BUFFS_8 4 /* config for 32K shared mem */
+#define NUM_RECV_BUFFS_16 9 /* config for 32K shared mem */
+#define NUM_RECV_BUFFS_32 16 /* config for 32K shared mem */
+#define NO_NOPCOMMANDS      /* only possible with NUM_XMIT_BUFFS=1 */
+
+/**************************************************************************/
+
+/* different DELAYs */
+#define DELAY(x) mdelay(32 * x);
+#define DELAY_16(); { udelay(16); }
+#define DELAY_18(); { udelay(4); }
+
+/* wait for command with timeout: */
+#define WAIT_4_SCB_CMD() \
+{ int i; \
+  for(i=0;i<16384;i++) { \
+    if(!p->scb->cmd_cuc) break; \
+    DELAY_18(); \
+    if(i == 16383) { \
+      printk("%s: scb_cmd timed out: %04x,%04x .. disabling i82586!!\n",dev->name,p->scb->cmd_cuc,p->scb->cus); \
+       if(!p->reseted) { p->reseted = 1; sun3_reset586(); } } } }
+
+#define WAIT_4_SCB_CMD_RUC() { int i; \
+  for(i=0;i<16384;i++) { \
+    if(!p->scb->cmd_ruc) break; \
+    DELAY_18(); \
+    if(i == 16383) { \
+      printk("%s: scb_cmd (ruc) timed out: %04x,%04x .. disabling i82586!!\n",dev->name,p->scb->cmd_ruc,p->scb->rus); \
+       if(!p->reseted) { p->reseted = 1; sun3_reset586(); } } } }
+
+#define WAIT_4_STAT_COMPL(addr) { int i; \
+   for(i=0;i<32767;i++) { \
+     if(swab16((addr)->cmd_status) & STAT_COMPL) break; \
+     DELAY_16(); DELAY_16(); } }
+
+static int     sun3_82586_probe1(struct net_device *dev,int ioaddr);
+static void    sun3_82586_interrupt(int irq,void *dev_id,struct pt_regs *reg_ptr);
+static int     sun3_82586_open(struct net_device *dev);
+static int     sun3_82586_close(struct net_device *dev);
+static int     sun3_82586_send_packet(struct sk_buff *,struct net_device *);
+static struct  net_device_stats *sun3_82586_get_stats(struct net_device *dev);
+static void    set_multicast_list(struct net_device *dev);
+static void    sun3_82586_timeout(struct net_device *dev);
+#if 0
+static void    sun3_82586_dump(struct net_device *,void *);
+#endif
+
+/* helper-functions */
+static int     init586(struct net_device *dev);
+static int     check586(struct net_device *dev,char *where,unsigned size);
+static void    alloc586(struct net_device *dev);
+static void    startrecv586(struct net_device *dev);
+static void   *alloc_rfa(struct net_device *dev,void *ptr);
+static void    sun3_82586_rcv_int(struct net_device *dev);
+static void    sun3_82586_xmt_int(struct net_device *dev);
+static void    sun3_82586_rnr_int(struct net_device *dev);
+
+struct priv
+{
+	struct net_device_stats stats;
+	unsigned long base;
+	char *memtop;
+	long int lock;
+	int reseted;
+	volatile struct rfd_struct	*rfd_last,*rfd_top,*rfd_first;
+	volatile struct scp_struct	*scp;	/* volatile is important */
+	volatile struct iscp_struct	*iscp;	/* volatile is important */
+	volatile struct scb_struct	*scb;	/* volatile is important */
+	volatile struct tbd_struct	*xmit_buffs[NUM_XMIT_BUFFS];
+	volatile struct transmit_cmd_struct *xmit_cmds[NUM_XMIT_BUFFS];
+#if (NUM_XMIT_BUFFS == 1)
+	volatile struct nop_cmd_struct *nop_cmds[2];
+#else
+	volatile struct nop_cmd_struct *nop_cmds[NUM_XMIT_BUFFS];
+#endif
+	volatile int		nop_point,num_recv_buffs;
+	volatile char		*xmit_cbuffs[NUM_XMIT_BUFFS];
+	volatile int		xmit_count,xmit_last;
+};
+
+/**********************************************
+ * close device
+ */
+static int sun3_82586_close(struct net_device *dev)
+{
+	free_irq(dev->irq, dev);
+
+	sun3_reset586(); /* the hard way to stop the receiver */
+
+	netif_stop_queue(dev);
+
+	return 0;
+}
+
+/**********************************************
+ * open device
+ */
+static int sun3_82586_open(struct net_device *dev)
+{
+	int ret;
+
+	sun3_disint();
+	alloc586(dev);
+	init586(dev);
+	startrecv586(dev);
+	sun3_enaint();
+
+	ret = request_irq(dev->irq, &sun3_82586_interrupt,0,dev->name,dev);
+	if (ret)
+	{
+		sun3_reset586();
+		return ret;
+	}
+
+	netif_start_queue(dev);
+
+	return 0; /* most done by init */
+}
+
+/**********************************************
+ * Check to see if there's an 82586 out there.
+ */
+static int check586(struct net_device *dev,char *where,unsigned size)
+{
+	struct priv pb;
+	struct priv *p = /* (struct priv *) dev->priv*/ &pb;
+	char *iscp_addr;
+	int i;
+
+	p->base = (unsigned long) dvma_btov(0);
+	p->memtop = (char *)dvma_btov((unsigned long)where);
+	p->scp = (struct scp_struct *)(p->base + SCP_DEFAULT_ADDRESS);
+	memset((char *)p->scp,0, sizeof(struct scp_struct));
+	for(i=0;i<sizeof(struct scp_struct);i++) /* memory was writeable? */
+		if(((char *)p->scp)[i])
+			return 0;
+	p->scp->sysbus = SYSBUSVAL;				/* 1 = 8Bit-Bus, 0 = 16 Bit */
+	if(p->scp->sysbus != SYSBUSVAL)
+		return 0;
+
+	iscp_addr = (char *)dvma_btov((unsigned long)where);
+	
+	p->iscp = (struct iscp_struct *) iscp_addr;
+	memset((char *)p->iscp,0, sizeof(struct iscp_struct));
+
+	p->scp->iscp = make24(p->iscp);
+	p->iscp->busy = 1;
+
+	sun3_reset586();
+	sun3_attn586();
+	DELAY(1);	/* wait a while... */
+	
+	if(p->iscp->busy) /* i82586 clears 'busy' after successful init */
+		return 0;
+
+	return 1;
+}
+
+/******************************************************************
+ * set iscp at the right place, called by sun3_82586_probe1 and open586.
+ */
+static void alloc586(struct net_device *dev)
+{
+	struct priv *p =	(struct priv *) dev->priv;
+
+	sun3_reset586();
+	DELAY(1);
+
+	p->scp	= (struct scp_struct *)	(p->base + SCP_DEFAULT_ADDRESS);
+	p->iscp	= (struct iscp_struct *) dvma_btov(dev->mem_start);
+	p->scb  = (struct scb_struct *)  ((char *)p->iscp + sizeof(struct iscp_struct));
+
+	memset((char *) p->iscp,0,sizeof(struct iscp_struct));
+	memset((char *) p->scp ,0,sizeof(struct scp_struct));
+
+	p->scp->iscp = make24(p->iscp);
+	p->scp->sysbus = SYSBUSVAL;
+	p->iscp->scb_offset = make16(p->scb);
+	p->iscp->scb_base = make24(dvma_btov(dev->mem_start));
+
+	p->iscp->busy = 1;
+	sun3_reset586();
+	sun3_attn586();
+
+	DELAY(1);
+
+	if(p->iscp->busy)
+		printk("%s: Init-Problems (alloc).\n",dev->name);
+
+	p->reseted = 0;
+
+	memset((char *)p->scb,0,sizeof(struct scb_struct));
+}
+
+int __init sun3_82586_probe(struct net_device *dev)
+{
+	unsigned long ioaddr, iopte;
+	static int found = 0;
+	
+	/* check that this machine has an onboard 82586 */
+	switch(idprom->id_machtype) {
+	case SM_SUN3|SM_3_160:
+	case SM_SUN3|SM_3_260:
+		/* these machines have 82586 */
+		break;
+
+	default:
+		return(-ENODEV);
+	}
+
+	if(found)
+		return -ENODEV;
+	
+	for(ioaddr = 0xfe00000; ioaddr < (0xfe00000 +
+	    SUN3_PMEG_SIZE); ioaddr += SUN3_PTE_SIZE) {
+
+		iopte = sun3_get_pte(ioaddr);
+		if(!(iopte & SUN3_PAGE_TYPE_IO)) /* this an io page? */
+			continue;
+
+		if(((iopte & SUN3_PAGE_PGNUM_MASK) << PAGE_SHIFT) ==
+		   IE_OBIO) {
+			found = 1;
+			break;
+		}
+	}
+	
+	if(!found)
+		return 0;
+	
+	SET_MODULE_OWNER(dev);
+
+	dev->irq = IE_IRQ;
+	dev->base_addr = ioaddr;
+	if(sun3_82586_probe1(dev, ioaddr) == 0)
+		return 0;
+
+	return -ENODEV;
+}
+
+static int __init sun3_82586_probe1(struct net_device *dev,int ioaddr)
+{
+	int i, size, retval;
+
+//	if (!request_region(ioaddr, SUN3_82586_TOTAL_SIZE, dev->name))
+//		return -EBUSY;
+
+	/* copy in the ethernet address from the prom */
+	for(i = 0; i < 6 ; i++)
+	     dev->dev_addr[i] = idprom->id_ethaddr[i];
+
+	printk("%s: SUN3 Intel 82586 found at %lx, ",dev->name,dev->base_addr);
+
+	/*
+	 * check (or search) IO-Memory, 32K
+	 */
+	size = 0x8000;
+
+	dev->mem_start = (unsigned long)dvma_malloc_align(0x8000, 0x1000);
+	dev->mem_end = dev->mem_start + size;
+
+	if(size != 0x2000 && size != 0x4000 && size != 0x8000) {
+		printk("\n%s: Illegal memory size %d. Allowed is 0x2000 or 0x4000 or 0x8000 bytes.\n",dev->name,size);
+		retval = -ENODEV;
+		goto out;
+	}
+	if(!check586(dev,(char *) dev->mem_start,size)) {
+		printk("?memcheck, Can't find memory at 0x%lx with size %d!\n",dev->mem_start,size);
+		retval = -ENODEV;
+		goto out;
+	}
+
+	dev->priv = (void *) kmalloc(sizeof(struct priv),GFP_KERNEL);
+	if(dev->priv == NULL) {
+		printk("%s: Ooops .. can't allocate private driver memory.\n",dev->name);
+		retval = -ENOMEM;
+		goto out;
+	}
+
+	/* warning: we don't free it on errors */
+	memset((char *) dev->priv,0,sizeof(struct priv));
+
+	((struct priv *) (dev->priv))->memtop = (char *)dvma_btov(dev->mem_start);
+	((struct priv *) (dev->priv))->base = (unsigned long) dvma_btov(0);
+	alloc586(dev);
+
+	/* set number of receive-buffs according to memsize */
+	if(size == 0x2000)
+		((struct priv *) dev->priv)->num_recv_buffs = NUM_RECV_BUFFS_8;
+	else if(size == 0x4000)
+		((struct priv *) dev->priv)->num_recv_buffs = NUM_RECV_BUFFS_16;
+	else
+		((struct priv *) dev->priv)->num_recv_buffs = NUM_RECV_BUFFS_32;
+
+	printk("Memaddr: 0x%lx, Memsize: %d, IRQ %d\n",dev->mem_start,size, dev->irq);
+	
+	dev->open		= sun3_82586_open;
+	dev->stop		= sun3_82586_close;
+	dev->get_stats		= sun3_82586_get_stats;
+	dev->tx_timeout 	= sun3_82586_timeout;
+	dev->watchdog_timeo	= HZ/20;
+	dev->hard_start_xmit 	= sun3_82586_send_packet;
+	dev->set_multicast_list = set_multicast_list;
+
+	dev->if_port 		= 0;
+
+	ether_setup(dev);
+
+	return 0;
+out:
+	return retval;
+}
+
+
+static int init586(struct net_device *dev)
+{
+	void *ptr;
+	int i,result=0;
+	struct priv *p = (struct priv *) dev->priv;
+	volatile struct configure_cmd_struct	*cfg_cmd;
+	volatile struct iasetup_cmd_struct *ias_cmd;
+	volatile struct tdr_cmd_struct *tdr_cmd;
+	volatile struct mcsetup_cmd_struct *mc_cmd;
+	struct dev_mc_list *dmi=dev->mc_list;
+	int num_addrs=dev->mc_count;
+
+	ptr = (void *) ((char *)p->scb + sizeof(struct scb_struct));
+
+	cfg_cmd = (struct configure_cmd_struct *)ptr; /* configure-command */
+	cfg_cmd->cmd_status	= 0;
+	cfg_cmd->cmd_cmd	= swab16(CMD_CONFIGURE | CMD_LAST);
+	cfg_cmd->cmd_link	= 0xffff;
+
+	cfg_cmd->byte_cnt	= 0x0a; /* number of cfg bytes */
+	cfg_cmd->fifo		= fifo; /* fifo-limit (8=tx:32/rx:64) */
+	cfg_cmd->sav_bf		= 0x40; /* hold or discard bad recv frames (bit 7) */
+	cfg_cmd->adr_len	= 0x2e; /* addr_len |!src_insert |pre-len |loopback */
+	cfg_cmd->priority	= 0x00;
+	cfg_cmd->ifs		= 0x60;
+	cfg_cmd->time_low	= 0x00;
+	cfg_cmd->time_high	= 0xf2;
+	cfg_cmd->promisc	= 0;
+	if(dev->flags & IFF_ALLMULTI) {
+		int len = ((char *) p->iscp - (char *) ptr - 8) / 6;
+		if(num_addrs > len)	{
+			printk("%s: switching to promisc. mode\n",dev->name);
+			dev->flags|=IFF_PROMISC;
+		}
+	}
+	if(dev->flags&IFF_PROMISC)
+	{
+			 cfg_cmd->promisc=1;
+			 dev->flags|=IFF_PROMISC;
+	}
+	cfg_cmd->carr_coll	= 0x00;
+
+	p->scb->cbl_offset	= make16(cfg_cmd);
+	p->scb->cmd_ruc		= 0;
+
+	p->scb->cmd_cuc		= CUC_START; /* cmd.-unit start */
+	sun3_attn586();
+
+	WAIT_4_STAT_COMPL(cfg_cmd);
+
+	if((swab16(cfg_cmd->cmd_status) & (STAT_OK|STAT_COMPL)) != (STAT_COMPL|STAT_OK))
+	{
+		printk("%s: configure command failed: %x\n",dev->name,swab16(cfg_cmd->cmd_status));
+		return 1;
+	}
+
+	/*
+	 * individual address setup
+	 */
+
+	ias_cmd = (struct iasetup_cmd_struct *)ptr;
+
+	ias_cmd->cmd_status	= 0;
+	ias_cmd->cmd_cmd	= swab16(CMD_IASETUP | CMD_LAST);
+	ias_cmd->cmd_link	= 0xffff;
+
+	memcpy((char *)&ias_cmd->iaddr,(char *) dev->dev_addr,ETH_ALEN);
+
+	p->scb->cbl_offset = make16(ias_cmd);
+
+	p->scb->cmd_cuc = CUC_START; /* cmd.-unit start */
+	sun3_attn586();
+
+	WAIT_4_STAT_COMPL(ias_cmd);
+
+	if((swab16(ias_cmd->cmd_status) & (STAT_OK|STAT_COMPL)) != (STAT_OK|STAT_COMPL)) {
+		printk("%s (82586): individual address setup command failed: %04x\n",dev->name,swab16(ias_cmd->cmd_status));
+		return 1;
+	}
+
+	/*
+	 * TDR, wire check .. e.g. no resistor e.t.c
+	 */
+	 
+	tdr_cmd = (struct tdr_cmd_struct *)ptr;
+
+	tdr_cmd->cmd_status	= 0;
+	tdr_cmd->cmd_cmd	= swab16(CMD_TDR | CMD_LAST);
+	tdr_cmd->cmd_link	= 0xffff;
+	tdr_cmd->status		= 0;
+
+	p->scb->cbl_offset = make16(tdr_cmd);
+	p->scb->cmd_cuc = CUC_START; /* cmd.-unit start */
+	sun3_attn586();
+
+	WAIT_4_STAT_COMPL(tdr_cmd);
+
+	if(!(swab16(tdr_cmd->cmd_status) & STAT_COMPL))
+	{
+		printk("%s: Problems while running the TDR.\n",dev->name);
+	}
+	else
+	{
+		DELAY_16(); /* wait for result */
+		result = swab16(tdr_cmd->status);
+
+		p->scb->cmd_cuc = p->scb->cus & STAT_MASK;
+		sun3_attn586(); /* ack the interrupts */
+
+		if(result & TDR_LNK_OK)
+			;
+		else if(result & TDR_XCVR_PRB)
+			printk("%s: TDR: Transceiver problem. Check the cable(s)!\n",dev->name);
+		else if(result & TDR_ET_OPN)
+			printk("%s: TDR: No correct termination %d clocks away.\n",dev->name,result & TDR_TIMEMASK);
+		else if(result & TDR_ET_SRT)
+		{
+			if (result & TDR_TIMEMASK) /* time == 0 -> strange :-) */
+				printk("%s: TDR: Detected a short circuit %d clocks away.\n",dev->name,result & TDR_TIMEMASK);
+		}
+		else
+			printk("%s: TDR: Unknown status %04x\n",dev->name,result);
+	}
+
+	/*
+	 * Multicast setup
+	 */
+	if(num_addrs && !(dev->flags & IFF_PROMISC) )
+	{
+		mc_cmd = (struct mcsetup_cmd_struct *) ptr;
+		mc_cmd->cmd_status = 0;
+		mc_cmd->cmd_cmd = swab16(CMD_MCSETUP | CMD_LAST);
+		mc_cmd->cmd_link = 0xffff;
+		mc_cmd->mc_cnt = swab16(num_addrs * 6);
+
+		for(i=0;i<num_addrs;i++,dmi=dmi->next)
+			memcpy((char *) mc_cmd->mc_list[i], dmi->dmi_addr,6);
+
+		p->scb->cbl_offset = make16(mc_cmd);
+		p->scb->cmd_cuc = CUC_START;
+		sun3_attn586();
+
+		WAIT_4_STAT_COMPL(mc_cmd);
+
+		if( (swab16(mc_cmd->cmd_status) & (STAT_COMPL|STAT_OK)) != (STAT_COMPL|STAT_OK) )
+			printk("%s: Can't apply multicast-address-list.\n",dev->name);
+	}
+
+	/*
+	 * alloc nop/xmit-cmds
+	 */
+#if (NUM_XMIT_BUFFS == 1)
+	for(i=0;i<2;i++)
+	{
+		p->nop_cmds[i] 			= (struct nop_cmd_struct *)ptr;
+		p->nop_cmds[i]->cmd_cmd		= swab16(CMD_NOP);
+		p->nop_cmds[i]->cmd_status 	= 0;
+		p->nop_cmds[i]->cmd_link	= make16((p->nop_cmds[i]));
+		ptr = (char *) ptr + sizeof(struct nop_cmd_struct);
+	}
+#else
+	for(i=0;i<NUM_XMIT_BUFFS;i++)
+	{
+		p->nop_cmds[i]			= (struct nop_cmd_struct *)ptr;
+		p->nop_cmds[i]->cmd_cmd		= swab16(CMD_NOP);
+		p->nop_cmds[i]->cmd_status	= 0;
+		p->nop_cmds[i]->cmd_link	= make16((p->nop_cmds[i]));
+		ptr = (char *) ptr + sizeof(struct nop_cmd_struct);
+	}
+#endif
+
+	ptr = alloc_rfa(dev,(void *)ptr); /* init receive-frame-area */
+
+	/*
+	 * alloc xmit-buffs / init xmit_cmds
+	 */
+	for(i=0;i<NUM_XMIT_BUFFS;i++)
+	{
+		p->xmit_cmds[i] = (struct transmit_cmd_struct *)ptr; /*transmit cmd/buff 0*/
+		ptr = (char *) ptr + sizeof(struct transmit_cmd_struct);
+		p->xmit_cbuffs[i] = (char *)ptr; /* char-buffs */
+		ptr = (char *) ptr + XMIT_BUFF_SIZE;
+		p->xmit_buffs[i] = (struct tbd_struct *)ptr; /* TBD */
+		ptr = (char *) ptr + sizeof(struct tbd_struct);
+		if((void *)ptr > (void *)dev->mem_end)
+		{
+			printk("%s: not enough shared-mem for your configuration!\n",dev->name);
+			return 1;
+		}
+		memset((char *)(p->xmit_cmds[i]) ,0, sizeof(struct transmit_cmd_struct));
+		memset((char *)(p->xmit_buffs[i]),0, sizeof(struct tbd_struct));
+		p->xmit_cmds[i]->cmd_link = make16(p->nop_cmds[(i+1)%NUM_XMIT_BUFFS]);
+		p->xmit_cmds[i]->cmd_status = swab16(STAT_COMPL);
+		p->xmit_cmds[i]->cmd_cmd = swab16(CMD_XMIT | CMD_INT);
+		p->xmit_cmds[i]->tbd_offset = make16((p->xmit_buffs[i]));
+		p->xmit_buffs[i]->next = 0xffff;
+		p->xmit_buffs[i]->buffer = make24((p->xmit_cbuffs[i]));
+	}
+
+	p->xmit_count = 0;
+	p->xmit_last	= 0;
+#ifndef NO_NOPCOMMANDS
+	p->nop_point	= 0;
+#endif
+
+	 /*
+		* 'start transmitter'
+		*/
+#ifndef NO_NOPCOMMANDS
+	p->scb->cbl_offset = make16(p->nop_cmds[0]);
+	p->scb->cmd_cuc = CUC_START;
+	sun3_attn586();
+	WAIT_4_SCB_CMD();
+#else
+	p->xmit_cmds[0]->cmd_link = make16(p->xmit_cmds[0]);
+	p->xmit_cmds[0]->cmd_cmd	= swab16(CMD_XMIT | CMD_SUSPEND | CMD_INT);
+#endif
+
+	/*
+	 * ack. interrupts
+	 */
+	p->scb->cmd_cuc = p->scb->cus & STAT_MASK;
+	sun3_attn586();
+	DELAY_16();
+
+	sun3_enaint();
+	sun3_active();
+
+	return 0;
+}
+
+/******************************************************
+ * This is a helper routine for sun3_82586_rnr_int() and init586().
+ * It sets up the Receive Frame Area (RFA).
+ */
+
+static void *alloc_rfa(struct net_device *dev,void *ptr)
+{
+	volatile struct rfd_struct *rfd = (struct rfd_struct *)ptr;
+	volatile struct rbd_struct *rbd;
+	int i;
+	struct priv *p = (struct priv *) dev->priv;
+
+	memset((char *) rfd,0,sizeof(struct rfd_struct)*(p->num_recv_buffs+rfdadd));
+	p->rfd_first = rfd;
+
+	for(i = 0; i < (p->num_recv_buffs+rfdadd); i++) {
+		rfd[i].next = make16(rfd + (i+1) % (p->num_recv_buffs+rfdadd) );
+		rfd[i].rbd_offset = 0xffff;
+	}
+	rfd[p->num_recv_buffs-1+rfdadd].last = RFD_SUSP;	 /* RU suspend */
+
+	ptr = (void *) (rfd + (p->num_recv_buffs + rfdadd) );
+
+	rbd = (struct rbd_struct *) ptr;
+	ptr = (void *) (rbd + p->num_recv_buffs);
+
+	 /* clr descriptors */
+	memset((char *) rbd,0,sizeof(struct rbd_struct)*(p->num_recv_buffs));
+
+	for(i=0;i<p->num_recv_buffs;i++)
+	{
+		rbd[i].next = make16((rbd + (i+1) % p->num_recv_buffs));
+		rbd[i].size = swab16(RECV_BUFF_SIZE);
+		rbd[i].buffer = make24(ptr);
+		ptr = (char *) ptr + RECV_BUFF_SIZE;
+	}
+
+	p->rfd_top	= p->rfd_first;
+	p->rfd_last = p->rfd_first + (p->num_recv_buffs - 1 + rfdadd);
+
+	p->scb->rfa_offset		= make16(p->rfd_first);
+	p->rfd_first->rbd_offset	= make16(rbd);
+
+	return ptr;
+}
+
+
+/**************************************************
+ * Interrupt Handler ...
+ */
+
+static void sun3_82586_interrupt(int irq,void *dev_id,struct pt_regs *reg_ptr)
+{
+	struct net_device *dev = dev_id;
+	unsigned short stat;
+	int cnt=0;
+	struct priv *p;
+
+	if (!dev) {
+		printk ("sun3_82586-interrupt: irq %d for unknown device.\n",irq);
+		return;
+	}
+	p = (struct priv *) dev->priv;
+
+	if(debuglevel > 1)
+		printk("I");
+
+	WAIT_4_SCB_CMD(); /* wait for last command	*/
+
+	while((stat=p->scb->cus & STAT_MASK))
+	{
+		p->scb->cmd_cuc = stat;
+		sun3_attn586();
+
+		if(stat & STAT_FR)	 /* received a frame */
+			sun3_82586_rcv_int(dev);
+
+		if(stat & STAT_RNR) /* RU went 'not ready' */
+		{
+			printk("(R)");
+			if(p->scb->rus & RU_SUSPEND) /* special case: RU_SUSPEND */
+			{
+				WAIT_4_SCB_CMD();
+				p->scb->cmd_ruc = RUC_RESUME;
+				sun3_attn586();
+				WAIT_4_SCB_CMD_RUC();
+			}
+			else
+			{
+				printk("%s: Receiver-Unit went 'NOT READY': %04x/%02x.\n",dev->name,(int) stat,(int) p->scb->rus);
+				sun3_82586_rnr_int(dev);
+			}
+		}
+
+		if(stat & STAT_CX)		/* command with I-bit set complete */
+			 sun3_82586_xmt_int(dev);
+
+#ifndef NO_NOPCOMMANDS
+		if(stat & STAT_CNA)	/* CU went 'not ready' */
+		{
+			if(netif_running(dev))
+				printk("%s: oops! CU has left active state. stat: %04x/%02x.\n",dev->name,(int) stat,(int) p->scb->cus);
+		}
+#endif
+
+		if(debuglevel > 1)
+			printk("%d",cnt++);
+
+		WAIT_4_SCB_CMD(); /* wait for ack. (sun3_82586_xmt_int can be faster than ack!!) */
+		if(p->scb->cmd_cuc)	 /* timed out? */
+		{
+			printk("%s: Acknowledge timed out.\n",dev->name);
+			sun3_disint();
+			break;
+		}
+	}
+
+	if(debuglevel > 1)
+		printk("i");
+}
+
+/*******************************************************
+ * receive-interrupt
+ */
+
+static void sun3_82586_rcv_int(struct net_device *dev)
+{
+	int status,cnt=0;
+	unsigned short totlen;
+	struct sk_buff *skb;
+	struct rbd_struct *rbd;
+	struct priv *p = (struct priv *) dev->priv;
+
+	if(debuglevel > 0)
+		printk("R");
+
+	for(;(status = p->rfd_top->stat_high) & RFD_COMPL;)
+	{
+			rbd = (struct rbd_struct *) make32(p->rfd_top->rbd_offset);
+
+			if(status & RFD_OK) /* frame received without error? */
+			{
+				if( (totlen = swab16(rbd->status)) & RBD_LAST) /* the first and the last buffer? */
+				{
+					totlen &= RBD_MASK; /* length of this frame */
+					rbd->status = 0;
+					skb = (struct sk_buff *) dev_alloc_skb(totlen+2);
+					if(skb != NULL)
+					{
+						skb->dev = dev;
+						skb_reserve(skb,2);
+						skb_put(skb,totlen);
+						eth_copy_and_sum(skb,(char *) p->base+swab32((unsigned long) rbd->buffer),totlen,0);
+						skb->protocol=eth_type_trans(skb,dev);
+						netif_rx(skb);
+						p->stats.rx_packets++;
+					}
+					else
+						p->stats.rx_dropped++;
+				}
+				else
+				{
+					int rstat;
+						 /* free all RBD's until RBD_LAST is set */
+					totlen = 0;
+					while(!((rstat=swab16(rbd->status)) & RBD_LAST))
+					{
+						totlen += rstat & RBD_MASK;
+						if(!rstat)
+						{
+							printk("%s: Whoops .. no end mark in RBD list\n",dev->name);
+							break;
+						}
+						rbd->status = 0;
+						rbd = (struct rbd_struct *) make32(rbd->next);
+					}
+					totlen += rstat & RBD_MASK;
+					rbd->status = 0;
+					printk("%s: received oversized frame! length: %d\n",dev->name,totlen);
+					p->stats.rx_dropped++;
+			 }
+		}
+		else /* frame !(ok), only with 'save-bad-frames' */
+		{
+			printk("%s: oops! rfd-error-status: %04x\n",dev->name,status);
+			p->stats.rx_errors++;
+		}
+		p->rfd_top->stat_high = 0;
+		p->rfd_top->last = RFD_SUSP; /* maybe exchange by RFD_LAST */
+		p->rfd_top->rbd_offset = 0xffff;
+		p->rfd_last->last = 0;				/* delete RFD_SUSP	*/
+		p->rfd_last = p->rfd_top;
+		p->rfd_top = (struct rfd_struct *) make32(p->rfd_top->next); /* step to next RFD */
+		p->scb->rfa_offset = make16(p->rfd_top);
+
+		if(debuglevel > 0)
+			printk("%d",cnt++);
+	}
+
+	if(automatic_resume)
+	{
+		WAIT_4_SCB_CMD();
+		p->scb->cmd_ruc = RUC_RESUME;
+		sun3_attn586();
+		WAIT_4_SCB_CMD_RUC();
+	}
+
+#ifdef WAIT_4_BUSY
+	{
+		int i;
+		for(i=0;i<1024;i++)
+		{
+			if(p->rfd_top->status)
+				break;
+			DELAY_16();
+			if(i == 1023)
+				printk("%s: RU hasn't fetched next RFD (not busy/complete)\n",dev->name);
+		}
+	}
+#endif
+
+#if 0
+	if(!at_least_one)
+	{
+		int i;
+		volatile struct rfd_struct *rfds=p->rfd_top;
+		volatile struct rbd_struct *rbds;
+		printk("%s: received a FC intr. without having a frame: %04x %d\n",dev->name,status,old_at_least);
+		for(i=0;i< (p->num_recv_buffs+4);i++)
+		{
+			rbds = (struct rbd_struct *) make32(rfds->rbd_offset);
+			printk("%04x:%04x ",rfds->status,rbds->status);
+			rfds = (struct rfd_struct *) make32(rfds->next);
+		}
+		printk("\nerrs: %04x %04x stat: %04x\n",(int)p->scb->rsc_errs,(int)p->scb->ovrn_errs,(int)p->scb->status);
+		printk("\nerrs: %04x %04x rus: %02x, cus: %02x\n",(int)p->scb->rsc_errs,(int)p->scb->ovrn_errs,(int)p->scb->rus,(int)p->scb->cus);
+	}
+	old_at_least = at_least_one;
+#endif
+
+	if(debuglevel > 0)
+		printk("r");
+}
+
+/**********************************************************
+ * handle 'Receiver went not ready'.
+ */
+
+static void sun3_82586_rnr_int(struct net_device *dev)
+{
+	struct priv *p = (struct priv *) dev->priv;
+
+	p->stats.rx_errors++;
+
+	WAIT_4_SCB_CMD();		/* wait for the last cmd, WAIT_4_FULLSTAT?? */
+	p->scb->cmd_ruc = RUC_ABORT; /* usually the RU is in the 'no resource'-state .. abort it now. */
+	sun3_attn586();
+	WAIT_4_SCB_CMD_RUC();		/* wait for accept cmd. */
+
+	alloc_rfa(dev,(char *)p->rfd_first);
+/* maybe add a check here, before restarting the RU */
+	startrecv586(dev); /* restart RU */
+
+	printk("%s: Receive-Unit restarted. Status: %04x\n",dev->name,p->scb->rus);
+
+}
+
+/**********************************************************
+ * handle xmit - interrupt
+ */
+
+static void sun3_82586_xmt_int(struct net_device *dev)
+{
+	int status;
+	struct priv *p = (struct priv *) dev->priv;
+
+	if(debuglevel > 0)
+		printk("X");
+
+	status = swab16(p->xmit_cmds[p->xmit_last]->cmd_status);
+	if(!(status & STAT_COMPL))
+		printk("%s: strange .. xmit-int without a 'COMPLETE'\n",dev->name);
+
+	if(status & STAT_OK)
+	{
+		p->stats.tx_packets++;
+		p->stats.collisions += (status & TCMD_MAXCOLLMASK);
+	}
+	else
+	{
+		p->stats.tx_errors++;
+		if(status & TCMD_LATECOLL) {
+			printk("%s: late collision detected.\n",dev->name);
+			p->stats.collisions++;
+		}
+		else if(status & TCMD_NOCARRIER) {
+			p->stats.tx_carrier_errors++;
+			printk("%s: no carrier detected.\n",dev->name);
+		}
+		else if(status & TCMD_LOSTCTS)
+			printk("%s: loss of CTS detected.\n",dev->name);
+		else if(status & TCMD_UNDERRUN) {
+			p->stats.tx_fifo_errors++;
+			printk("%s: DMA underrun detected.\n",dev->name);
+		}
+		else if(status & TCMD_MAXCOLL) {
+			printk("%s: Max. collisions exceeded.\n",dev->name);
+			p->stats.collisions += 16;
+		}
+	}
+
+#if (NUM_XMIT_BUFFS > 1)
+	if( (++p->xmit_last) == NUM_XMIT_BUFFS)
+		p->xmit_last = 0;
+#endif
+	netif_wake_queue(dev);
+}
+
+/***********************************************************
+ * (re)start the receiver
+ */
+
+static void startrecv586(struct net_device *dev)
+{
+	struct priv *p = (struct priv *) dev->priv;
+
+	WAIT_4_SCB_CMD();
+	WAIT_4_SCB_CMD_RUC();
+	p->scb->rfa_offset = make16(p->rfd_first);
+	p->scb->cmd_ruc = RUC_START;
+	sun3_attn586();		/* start cmd. */
+	WAIT_4_SCB_CMD_RUC();	/* wait for accept cmd. (no timeout!!) */
+}
+
+static void sun3_82586_timeout(struct net_device *dev)
+{
+	struct priv *p = (struct priv *) dev->priv;
+#ifndef NO_NOPCOMMANDS
+	if(p->scb->cus & CU_ACTIVE) /* COMMAND-UNIT active? */
+	{
+		netif_wake_queue(dev);
+#ifdef DEBUG
+		printk("%s: strange ... timeout with CU active?!?\n",dev->name);
+		printk("%s: X0: %04x N0: %04x N1: %04x %d\n",dev->name,(int)swab16(p->xmit_cmds[0]->cmd_status),(int)swab16(p->nop_cmds[0]->cmd_status),(int)swab16(p->nop_cmds[1]->cmd_status),(int)p->nop_point);
+#endif
+		p->scb->cmd_cuc = CUC_ABORT;
+		sun3_attn586();
+		WAIT_4_SCB_CMD();
+		p->scb->cbl_offset = make16(p->nop_cmds[p->nop_point]);
+		p->scb->cmd_cuc = CUC_START;
+		sun3_attn586();
+		WAIT_4_SCB_CMD();
+		dev->trans_start = jiffies;
+		return 0;
+	}
+#endif
+	{
+#ifdef DEBUG
+		printk("%s: xmitter timed out, try to restart! stat: %02x\n",dev->name,p->scb->cus);
+		printk("%s: command-stats: %04x %04x\n",dev->name,swab16(p->xmit_cmds[0]->cmd_status),swab16(p->xmit_cmds[1]->cmd_status));
+		printk("%s: check, whether you set the right interrupt number!\n",dev->name);
+#endif
+		sun3_82586_close(dev);
+		sun3_82586_open(dev);
+	}
+	dev->trans_start = jiffies;
+}
+
+/******************************************************
+ * send frame
+ */
+
+static int sun3_82586_send_packet(struct sk_buff *skb, struct net_device *dev)
+{
+	int len,i;
+#ifndef NO_NOPCOMMANDS
+	int next_nop;
+#endif
+	struct priv *p = (struct priv *) dev->priv;
+
+	if(skb->len > XMIT_BUFF_SIZE)
+	{
+		printk("%s: Sorry, max. framelength is %d bytes. The length of your frame is %d bytes.\n",dev->name,XMIT_BUFF_SIZE,skb->len);
+		return 0;
+	}
+
+	netif_stop_queue(dev);
+
+#if(NUM_XMIT_BUFFS > 1)
+	if(test_and_set_bit(0,(void *) &p->lock)) {
+		printk("%s: Queue was locked\n",dev->name);
+		return 1;
+	}
+	else
+#endif
+	{
+		memcpy((char *)p->xmit_cbuffs[p->xmit_count],(char *)(skb->data),skb->len);
+		len = (ETH_ZLEN < skb->len) ? skb->len : ETH_ZLEN;
+
+#if (NUM_XMIT_BUFFS == 1)
+#	ifdef NO_NOPCOMMANDS
+
+#ifdef DEBUG
+		if(p->scb->cus & CU_ACTIVE)
+		{
+			printk("%s: Hmmm .. CU is still running and we wanna send a new packet.\n",dev->name);
+			printk("%s: stat: %04x %04x\n",dev->name,p->scb->cus,swab16(p->xmit_cmds[0]->cmd_status));
+		}
+#endif
+
+		p->xmit_buffs[0]->size = swab16(TBD_LAST | len);
+		for(i=0;i<16;i++)
+		{
+			p->xmit_cmds[0]->cmd_status = 0;
+			WAIT_4_SCB_CMD();
+			if( (p->scb->cus & CU_STATUS) == CU_SUSPEND)
+				p->scb->cmd_cuc = CUC_RESUME;
+			else
+			{
+				p->scb->cbl_offset = make16(p->xmit_cmds[0]);
+				p->scb->cmd_cuc = CUC_START;
+			}
+
+			sun3_attn586();
+			dev->trans_start = jiffies;
+			if(!i)
+				dev_kfree_skb(skb);
+			WAIT_4_SCB_CMD();
+			if( (p->scb->cus & CU_ACTIVE)) /* test it, because CU sometimes doesn't start immediately */
+				break;
+			if(p->xmit_cmds[0]->cmd_status)
+				break;
+			if(i==15)
+				printk("%s: Can't start transmit-command.\n",dev->name);
+		}
+#	else
+		next_nop = (p->nop_point + 1) & 0x1;
+		p->xmit_buffs[0]->size = swab16(TBD_LAST | len);
+
+		p->xmit_cmds[0]->cmd_link	 = p->nop_cmds[next_nop]->cmd_link
+			= make16((p->nop_cmds[next_nop]));
+		p->xmit_cmds[0]->cmd_status = p->nop_cmds[next_nop]->cmd_status = 0;
+
+		p->nop_cmds[p->nop_point]->cmd_link = make16((p->xmit_cmds[0]));
+		dev->trans_start = jiffies;
+		p->nop_point = next_nop;
+		dev_kfree_skb(skb);
+#	endif
+#else
+		p->xmit_buffs[p->xmit_count]->size = swab16(TBD_LAST | len);
+		if( (next_nop = p->xmit_count + 1) == NUM_XMIT_BUFFS )
+			next_nop = 0;
+
+		p->xmit_cmds[p->xmit_count]->cmd_status	= 0;
+		/* linkpointer of xmit-command already points to next nop cmd */
+		p->nop_cmds[next_nop]->cmd_link = make16((p->nop_cmds[next_nop]));
+		p->nop_cmds[next_nop]->cmd_status = 0;
+
+		p->nop_cmds[p->xmit_count]->cmd_link = make16((p->xmit_cmds[p->xmit_count]));
+		dev->trans_start = jiffies;
+		p->xmit_count = next_nop;
+
+		{
+			unsigned long flags;
+			save_flags(flags);
+			cli();
+			if(p->xmit_count != p->xmit_last)
+				netif_wake_queue(dev);
+			p->lock = 0;
+			restore_flags(flags);
+		}
+		dev_kfree_skb(skb);
+#endif
+	}
+	return 0;
+}
+
+/*******************************************
+ * Someone wanna have the statistics
+ */
+
+static struct net_device_stats *sun3_82586_get_stats(struct net_device *dev)
+{
+	struct priv *p = (struct priv *) dev->priv;
+	unsigned short crc,aln,rsc,ovrn;
+
+	crc = swab16(p->scb->crc_errs); /* get error-statistic from the ni82586 */
+	p->scb->crc_errs = 0;
+	aln = swab16(p->scb->aln_errs);
+	p->scb->aln_errs = 0;
+	rsc = swab16(p->scb->rsc_errs);
+	p->scb->rsc_errs = 0;
+	ovrn = swab16(p->scb->ovrn_errs);
+	p->scb->ovrn_errs = 0;
+
+	p->stats.rx_crc_errors += crc;
+	p->stats.rx_fifo_errors += ovrn;
+	p->stats.rx_frame_errors += aln;
+	p->stats.rx_dropped += rsc;
+
+	return &p->stats;
+}
+
+/********************************************************
+ * Set MC list ..
+ */
+
+static void set_multicast_list(struct net_device *dev)
+{
+	netif_stop_queue(dev);
+	sun3_disint();
+	alloc586(dev);
+	init586(dev);
+	startrecv586(dev);
+	sun3_enaint();
+	netif_wake_queue(dev);
+}
+
+#ifdef MODULE
+#error This code is not currently supported as a module
+static struct net_device dev_sun3_82586;
+
+int init_module(void)
+{
+	dev_sun3_82586.init = sun3_82586_probe;
+	if (register_netdev(&dev_sun3_82586) != 0)
+		return -EIO;
+	return 0;
+}
+
+void cleanup_module(void)
+{
+	unregister_netdev(&dev_sun3_82586);
+	kfree(dev_sun3_82586.priv);
+	dev_sun3_82586.priv = NULL;
+}
+#endif /* MODULE */
+
+#if 0
+/*
+ * DUMP .. we expect a not running CMD unit and enough space
+ */
+void sun3_82586_dump(struct net_device *dev,void *ptr)
+{
+	struct priv *p = (struct priv *) dev->priv;
+	struct dump_cmd_struct *dump_cmd = (struct dump_cmd_struct *) ptr;
+	int i;
+
+	p->scb->cmd_cuc = CUC_ABORT;
+	sun3_attn586();
+	WAIT_4_SCB_CMD();
+	WAIT_4_SCB_CMD_RUC();
+
+	dump_cmd->cmd_status = 0;
+	dump_cmd->cmd_cmd = CMD_DUMP | CMD_LAST;
+	dump_cmd->dump_offset = make16((dump_cmd + 1));
+	dump_cmd->cmd_link = 0xffff;
+
+	p->scb->cbl_offset = make16(dump_cmd);
+	p->scb->cmd_cuc = CUC_START;
+	sun3_attn586();
+	WAIT_4_STAT_COMPL(dump_cmd);
+
+	if( (dump_cmd->cmd_status & (STAT_COMPL|STAT_OK)) != (STAT_COMPL|STAT_OK) )
+				printk("%s: Can't get dump information.\n",dev->name);
+
+	for(i=0;i<170;i++) {
+		printk("%02x ",(int) ((unsigned char *) (dump_cmd + 1))[i]);
+		if(i % 24 == 23)
+			printk("\n");
+	}
+	printk("\n");
+}
+#endif
+
+MODULE_LICENSE("GPL");
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)