--- /dev/null
+/*
+ * 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 lance */
+ switch(idprom->id_machtype) {
+ case SM_SUN3|SM_3_160:
+ case SM_SUN3|SM_3_260:
+ /* these machines have lance */
+ 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");
--- /dev/null
+/*
+ * Intel i82586 Ethernet definitions
+ *
+ * This is an extension to the Linux operating system, and is covered by the
+ * same Gnu Public License that covers that work.
+ *
+ * copyrights (c) 1994 by Michael Hipp (hippm@informatik.uni-tuebingen.de)
+ *
+ * I have done a look in the following sources:
+ * crynwr-packet-driver by Russ Nelson
+ * Garret A. Wollman's i82586-driver for BSD
+ */
+
+/*
+ * Cloned from ni52.h, copyright as above.
+ *
+ * Modified for Sun3 OBIO i82586 by Sam Creasey (sammy@sammy.net)
+ */
+
+
+/* defines for the obio chip (not vme) */
+#define IEOB_NORSET 0x80 /* don't reset the board */
+#define IEOB_ONAIR 0x40 /* put us on the air */
+#define IEOB_ATTEN 0x20 /* attention! */
+#define IEOB_IENAB 0x10 /* interrupt enable */
+#define IEOB_XXXXX 0x08 /* free bit */
+#define IEOB_XCVRL2 0x04 /* level 2 transceiver? */
+#define IEOB_BUSERR 0x02 /* bus error */
+#define IEOB_INT 0x01 /* interrupt */
+
+/* where the obio one lives */
+#define IE_OBIO 0xc0000
+#define IE_IRQ 3
+
+/*
+ * where to find the System Configuration Pointer (SCP)
+ */
+#define SCP_DEFAULT_ADDRESS 0xfffff4
+
+
+/*
+ * System Configuration Pointer Struct
+ */
+
+struct scp_struct
+{
+ unsigned short zero_dum0; /* has to be zero */
+ unsigned char sysbus; /* 0=16Bit,1=8Bit */
+ unsigned char zero_dum1; /* has to be zero for 586 */
+ unsigned short zero_dum2;
+ unsigned short zero_dum3;
+ char *iscp; /* pointer to the iscp-block */
+};
+
+
+/*
+ * Intermediate System Configuration Pointer (ISCP)
+ */
+struct iscp_struct
+{
+ unsigned char busy; /* 586 clears after successful init */
+ unsigned char zero_dummy; /* has to be zero */
+ unsigned short scb_offset; /* pointeroffset to the scb_base */
+ char *scb_base; /* base-address of all 16-bit offsets */
+};
+
+/*
+ * System Control Block (SCB)
+ */
+struct scb_struct
+{
+ unsigned char rus;
+ unsigned char cus;
+ unsigned char cmd_ruc; /* command word: RU part */
+ unsigned char cmd_cuc; /* command word: CU part & ACK */
+ unsigned short cbl_offset; /* pointeroffset, command block list */
+ unsigned short rfa_offset; /* pointeroffset, receive frame area */
+ unsigned short crc_errs; /* CRC-Error counter */
+ unsigned short aln_errs; /* allignmenterror counter */
+ unsigned short rsc_errs; /* Resourceerror counter */
+ unsigned short ovrn_errs; /* OVerrunerror counter */
+};
+
+/*
+ * possible command values for the command word
+ */
+#define RUC_MASK 0x0070 /* mask for RU commands */
+#define RUC_NOP 0x0000 /* NOP-command */
+#define RUC_START 0x0010 /* start RU */
+#define RUC_RESUME 0x0020 /* resume RU after suspend */
+#define RUC_SUSPEND 0x0030 /* suspend RU */
+#define RUC_ABORT 0x0040 /* abort receiver operation immediately */
+
+#define CUC_MASK 0x07 /* mask for CU command */
+#define CUC_NOP 0x00 /* NOP-command */
+#define CUC_START 0x01 /* start execution of 1. cmd on the CBL */
+#define CUC_RESUME 0x02 /* resume after suspend */
+#define CUC_SUSPEND 0x03 /* Suspend CU */
+#define CUC_ABORT 0x04 /* abort command operation immediately */
+
+#define ACK_MASK 0xf0 /* mask for ACK command */
+#define ACK_CX 0x80 /* acknowledges STAT_CX */
+#define ACK_FR 0x40 /* ack. STAT_FR */
+#define ACK_CNA 0x20 /* ack. STAT_CNA */
+#define ACK_RNR 0x10 /* ack. STAT_RNR */
+
+/*
+ * possible status values for the status word
+ */
+#define STAT_MASK 0xf0 /* mask for cause of interrupt */
+#define STAT_CX 0x80 /* CU finished cmd with its I bit set */
+#define STAT_FR 0x40 /* RU finished receiving a frame */
+#define STAT_CNA 0x20 /* CU left active state */
+#define STAT_RNR 0x10 /* RU left ready state */
+
+#define CU_STATUS 0x7 /* CU status, 0=idle */
+#define CU_SUSPEND 0x1 /* CU is suspended */
+#define CU_ACTIVE 0x2 /* CU is active */
+
+#define RU_STATUS 0x70 /* RU status, 0=idle */
+#define RU_SUSPEND 0x10 /* RU suspended */
+#define RU_NOSPACE 0x20 /* RU no resources */
+#define RU_READY 0x40 /* RU is ready */
+
+/*
+ * Receive Frame Descriptor (RFD)
+ */
+struct rfd_struct
+{
+ unsigned char stat_low; /* status word */
+ unsigned char stat_high; /* status word */
+ unsigned char rfd_sf; /* 82596 mode only */
+ unsigned char last; /* Bit15,Last Frame on List / Bit14,suspend */
+ unsigned short next; /* linkoffset to next RFD */
+ unsigned short rbd_offset; /* pointeroffset to RBD-buffer */
+ unsigned char dest[6]; /* ethernet-address, destination */
+ unsigned char source[6]; /* ethernet-address, source */
+ unsigned short length; /* 802.3 frame-length */
+ unsigned short zero_dummy; /* dummy */
+};
+
+#define RFD_LAST 0x80 /* last: last rfd in the list */
+#define RFD_SUSP 0x40 /* last: suspend RU after */
+#define RFD_COMPL 0x80
+#define RFD_OK 0x20
+#define RFD_BUSY 0x40
+#define RFD_ERR_LEN 0x10 /* Length error (if enabled length-checking */
+#define RFD_ERR_CRC 0x08 /* CRC error */
+#define RFD_ERR_ALGN 0x04 /* Alignment error */
+#define RFD_ERR_RNR 0x02 /* status: receiver out of resources */
+#define RFD_ERR_OVR 0x01 /* DMA Overrun! */
+
+#define RFD_ERR_FTS 0x0080 /* Frame to short */
+#define RFD_ERR_NEOP 0x0040 /* No EOP flag (for bitstuffing only) */
+#define RFD_ERR_TRUN 0x0020 /* (82596 only/SF mode) indicates truncated frame */
+#define RFD_MATCHADD 0x0002 /* status: Destinationaddress !matches IA (only 82596) */
+#define RFD_COLLDET 0x0001 /* Detected collision during reception */
+
+/*
+ * Receive Buffer Descriptor (RBD)
+ */
+struct rbd_struct
+{
+ unsigned short status; /* status word,number of used bytes in buff */
+ unsigned short next; /* pointeroffset to next RBD */
+ char *buffer; /* receive buffer address pointer */
+ unsigned short size; /* size of this buffer */
+ unsigned short zero_dummy; /* dummy */
+};
+
+#define RBD_LAST 0x8000 /* last buffer */
+#define RBD_USED 0x4000 /* this buffer has data */
+#define RBD_MASK 0x3fff /* size-mask for length */
+
+/*
+ * Statusvalues for Commands/RFD
+ */
+#define STAT_COMPL 0x8000 /* status: frame/command is complete */
+#define STAT_BUSY 0x4000 /* status: frame/command is busy */
+#define STAT_OK 0x2000 /* status: frame/command is ok */
+
+/*
+ * Action-Commands
+ */
+#define CMD_NOP 0x0000 /* NOP */
+#define CMD_IASETUP 0x0001 /* initial address setup command */
+#define CMD_CONFIGURE 0x0002 /* configure command */
+#define CMD_MCSETUP 0x0003 /* MC setup command */
+#define CMD_XMIT 0x0004 /* transmit command */
+#define CMD_TDR 0x0005 /* time domain reflectometer (TDR) command */
+#define CMD_DUMP 0x0006 /* dump command */
+#define CMD_DIAGNOSE 0x0007 /* diagnose command */
+
+/*
+ * Action command bits
+ */
+#define CMD_LAST 0x8000 /* indicates last command in the CBL */
+#define CMD_SUSPEND 0x4000 /* suspend CU after this CB */
+#define CMD_INT 0x2000 /* generate interrupt after execution */
+
+/*
+ * NOP - command
+ */
+struct nop_cmd_struct
+{
+ unsigned short cmd_status; /* status of this command */
+ unsigned short cmd_cmd; /* the command itself (+bits) */
+ unsigned short cmd_link; /* offsetpointer to next command */
+};
+
+/*
+ * IA Setup command
+ */
+struct iasetup_cmd_struct
+{
+ unsigned short cmd_status;
+ unsigned short cmd_cmd;
+ unsigned short cmd_link;
+ unsigned char iaddr[6];
+};
+
+/*
+ * Configure command
+ */
+struct configure_cmd_struct
+{
+ unsigned short cmd_status;
+ unsigned short cmd_cmd;
+ unsigned short cmd_link;
+ unsigned char byte_cnt; /* size of the config-cmd */
+ unsigned char fifo; /* fifo/recv monitor */
+ unsigned char sav_bf; /* save bad frames (bit7=1)*/
+ unsigned char adr_len; /* adr_len(0-2),al_loc(3),pream(4-5),loopbak(6-7)*/
+ unsigned char priority; /* lin_prio(0-2),exp_prio(4-6),bof_metd(7) */
+ unsigned char ifs; /* inter frame spacing */
+ unsigned char time_low; /* slot time low */
+ unsigned char time_high; /* slot time high(0-2) and max. retries(4-7) */
+ unsigned char promisc; /* promisc-mode(0) , et al (1-7) */
+ unsigned char carr_coll; /* carrier(0-3)/collision(4-7) stuff */
+ unsigned char fram_len; /* minimal frame len */
+ unsigned char dummy; /* dummy */
+};
+
+/*
+ * Multicast Setup command
+ */
+struct mcsetup_cmd_struct
+{
+ unsigned short cmd_status;
+ unsigned short cmd_cmd;
+ unsigned short cmd_link;
+ unsigned short mc_cnt; /* number of bytes in the MC-List */
+ unsigned char mc_list[0][6]; /* pointer to 6 bytes entries */
+};
+
+/*
+ * DUMP command
+ */
+struct dump_cmd_struct
+{
+ unsigned short cmd_status;
+ unsigned short cmd_cmd;
+ unsigned short cmd_link;
+ unsigned short dump_offset; /* pointeroffset to DUMP space */
+};
+
+/*
+ * transmit command
+ */
+struct transmit_cmd_struct
+{
+ unsigned short cmd_status;
+ unsigned short cmd_cmd;
+ unsigned short cmd_link;
+ unsigned short tbd_offset; /* pointeroffset to TBD */
+ unsigned char dest[6]; /* destination address of the frame */
+ unsigned short length; /* user defined: 802.3 length / Ether type */
+};
+
+#define TCMD_ERRMASK 0x0fa0
+#define TCMD_MAXCOLLMASK 0x000f
+#define TCMD_MAXCOLL 0x0020
+#define TCMD_HEARTBEAT 0x0040
+#define TCMD_DEFERRED 0x0080
+#define TCMD_UNDERRUN 0x0100
+#define TCMD_LOSTCTS 0x0200
+#define TCMD_NOCARRIER 0x0400
+#define TCMD_LATECOLL 0x0800
+
+struct tdr_cmd_struct
+{
+ unsigned short cmd_status;
+ unsigned short cmd_cmd;
+ unsigned short cmd_link;
+ unsigned short status;
+};
+
+#define TDR_LNK_OK 0x8000 /* No link problem identified */
+#define TDR_XCVR_PRB 0x4000 /* indicates a transceiver problem */
+#define TDR_ET_OPN 0x2000 /* open, no correct termination */
+#define TDR_ET_SRT 0x1000 /* TDR detected a short circuit */
+#define TDR_TIMEMASK 0x07ff /* mask for the time field */
+
+/*
+ * Transmit Buffer Descriptor (TBD)
+ */
+struct tbd_struct
+{
+ unsigned short size; /* size + EOF-Flag(15) */
+ unsigned short next; /* pointeroffset to next TBD */
+ char *buffer; /* pointer to buffer */
+};
+
+#define TBD_LAST 0x8000 /* EOF-Flag, indicates last buffer in list */
+
+
+
+
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