363 lines
9.4 KiB
C
363 lines
9.4 KiB
C
/*
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wdeth.c
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Created: March 14, 1994 by Philip Homburg
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*/
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#include <minix/drivers.h>
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#include <net/gen/ether.h>
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#include <net/gen/eth_io.h>
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#include "assert.h"
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#include "local.h"
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#include "dp8390.h"
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#include "wdeth.h"
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#if ENABLE_WDETH
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#define WET_ETHERNET 0x01 /* Ethernet transceiver */
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#define WET_STARLAN 0x02 /* Starlan transceiver */
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#define WET_INTERF_CHIP 0x04 /* has a WD83C583 interface chip */
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#define WET_BRD_16BIT 0x08 /* 16 bit board */
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#define WET_SLT_16BIT 0x10 /* 16 bit slot */
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#define WET_790 0x20 /* '790 chip */
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static int we_int_table[8]= { 9, 3, 5, 7, 10, 11, 15, 4 };
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static int we_790int_table[8]= { 0, 9, 3, 5, 7, 10, 11, 15 };
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static void we_init(dpeth_t *dep);
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static void we_stop(dpeth_t *dep);
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static int we_aliasing(dpeth_t *dep);
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static int we_interface_chip(dpeth_t *dep);
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static int we_16bitboard(dpeth_t *dep);
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static int we_16bitslot(dpeth_t *dep);
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static int we_ultra(dpeth_t *dep);
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/*===========================================================================*
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* wdeth_probe *
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*===========================================================================*/
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int wdeth_probe(dep)
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dpeth_t *dep;
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{
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int sum;
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if (dep->de_linmem == 0)
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return 0; /* No shared memory, so no WD board */
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sum = inb_we(dep, EPL_EA0) + inb_we(dep, EPL_EA1) +
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inb_we(dep, EPL_EA2) + inb_we(dep, EPL_EA3) +
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inb_we(dep, EPL_EA4) + inb_we(dep, EPL_EA5) +
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inb_we(dep, EPL_TLB) + inb_we(dep, EPL_CHKSUM);
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if ((sum & 0xFF) != 0xFF)
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return 0; /* No ethernet board at this address */
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dep->de_initf= we_init;
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dep->de_stopf= we_stop;
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dep->de_prog_IO= 0;
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return 1;
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}
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/*===========================================================================*
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* we_init *
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*===========================================================================*/
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static void we_init(dep)
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dpeth_t *dep;
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{
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int i, int_indx, int_nr;
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int tlb, rambit, revision;
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int icr, irr, hwr, b, gcr;
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int we_type;
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int sendq_nr;
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assert(dep->de_mode == DEM_ENABLED);
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assert(!(dep->de_flags & DEF_ENABLED));
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dep->de_address.ea_addr[0] = inb_we(dep, EPL_EA0);
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dep->de_address.ea_addr[1] = inb_we(dep, EPL_EA1);
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dep->de_address.ea_addr[2] = inb_we(dep, EPL_EA2);
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dep->de_address.ea_addr[3] = inb_we(dep, EPL_EA3);
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dep->de_address.ea_addr[4] = inb_we(dep, EPL_EA4);
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dep->de_address.ea_addr[5] = inb_we(dep, EPL_EA5);
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dep->de_dp8390_port= dep->de_base_port + EPL_DP8390;
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dep->de_16bit= 0;
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we_type= 0;
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we_type |= WET_ETHERNET; /* assume ethernet */
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if (we_ultra(dep))
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we_type |= WET_790;
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if (!we_aliasing(dep))
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{
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if (we_interface_chip(dep))
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we_type |= WET_INTERF_CHIP;
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if (we_16bitboard(dep))
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{
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we_type |= WET_BRD_16BIT;
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if (we_16bitslot(dep))
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we_type |= WET_SLT_16BIT;
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}
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}
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if (we_type & WET_SLT_16BIT)
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dep->de_16bit= 1;
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/* look at the on board ram size. */
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tlb= inb_we(dep, EPL_TLB);
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revision= tlb & E_TLB_REV;
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rambit= tlb & E_TLB_RAM;
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if (dep->de_ramsize != 0)
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{
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/* size set from boot environment. */
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}
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else if (revision < 2)
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{
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dep->de_ramsize= 0x2000; /* 8K */
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if (we_type & WET_BRD_16BIT)
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dep->de_ramsize= 0x4000; /* 16K */
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else if ((we_type & WET_INTERF_CHIP) &&
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inb_we(dep, EPL_ICR) & E_ICR_MEMBIT)
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{
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dep->de_ramsize= 0x8000; /* 32K */
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}
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}
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else
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{
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if (we_type & WET_BRD_16BIT)
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{
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/* 32K or 16K */
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dep->de_ramsize= rambit ? 0x8000 : 0x4000;
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}
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else
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{
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/* 32K or 8K */
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dep->de_ramsize= rambit ? 0x8000 : 0x2000;
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}
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}
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if (we_type & WET_790)
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{
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outb_we(dep, EPL_MSR, E_MSR_RESET);
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if ((we_type & (WET_BRD_16BIT|WET_SLT_16BIT)) ==
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(WET_BRD_16BIT|WET_SLT_16BIT))
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{
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outb_we(dep, EPL_LAAR, E_LAAR_LAN16E | E_LAAR_MEM16E);
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}
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}
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else if (we_type & WET_BRD_16BIT)
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{
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if (we_type & WET_SLT_16BIT)
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{
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outb_we(dep, EPL_LAAR, E_LAAR_A19 | E_LAAR_SOFTINT |
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E_LAAR_LAN16E | E_LAAR_MEM16E);
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}
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else
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{
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outb_we(dep, EPL_LAAR, E_LAAR_A19 | E_LAAR_SOFTINT |
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E_LAAR_LAN16E);
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}
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}
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if (we_type & WET_790)
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{
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outb_we(dep, EPL_MSR, E_MSR_MENABLE);
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hwr= inb_we(dep, EPL_790_HWR);
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outb_we(dep, EPL_790_HWR, hwr | E_790_HWR_SWH);
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b= inb_we(dep, EPL_790_B);
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outb_we(dep, EPL_790_B, ((dep->de_linmem >> 13) & 0x0f) |
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((dep->de_linmem >> 11) & 0x40) | (b & 0xb0));
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outb_we(dep, EPL_790_HWR, hwr & ~E_790_HWR_SWH);
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}
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else
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{
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outb_we(dep, EPL_MSR, E_MSR_RESET);
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outb_we(dep, EPL_MSR, E_MSR_MENABLE |
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((dep->de_linmem >> 13) & E_MSR_MEMADDR));
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}
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if ((we_type & WET_INTERF_CHIP) && !(we_type & WET_790))
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{
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icr= inb_we(dep, EPL_ICR);
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irr= inb_we(dep, EPL_IRR);
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int_indx= (icr & E_ICR_IR2) |
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((irr & (E_IRR_IR0|E_IRR_IR1)) >> 5);
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int_nr= we_int_table[int_indx];
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#if DEBUG
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{ printf("%s: encoded irq= %d\n", dep->de_name, int_nr); }
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#endif
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if (dep->de_irq & DEI_DEFAULT) dep->de_irq= int_nr;
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outb_we(dep, EPL_IRR, irr | E_IRR_IEN);
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}
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if (we_type & WET_790)
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{
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hwr= inb_we(dep, EPL_790_HWR);
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outb_we(dep, EPL_790_HWR, hwr | E_790_HWR_SWH);
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gcr= inb_we(dep, EPL_790_GCR);
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outb_we(dep, EPL_790_HWR, hwr & ~E_790_HWR_SWH);
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int_indx= ((gcr & E_790_GCR_IR2) >> 4) |
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((gcr & (E_790_GCR_IR1|E_790_GCR_IR0)) >> 2);
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int_nr= we_790int_table[int_indx];
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#if DEBUG
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{ printf("%s: encoded irq= %d\n", dep->de_name, int_nr); }
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#endif
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if (dep->de_irq & DEI_DEFAULT) dep->de_irq= int_nr;
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icr= inb_we(dep, EPL_790_ICR);
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outb_we(dep, EPL_790_ICR, icr | E_790_ICR_EIL);
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}
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/* Strip the "default flag." */
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dep->de_irq &= ~DEI_DEFAULT;
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if (!debug)
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{
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printf("%s: WD80%d3 at %X:%d:%lX\n",
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dep->de_name, we_type & WET_BRD_16BIT ? 1 : 0,
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dep->de_base_port, dep->de_irq, dep->de_linmem);
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}
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else
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{
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printf("%s: Western Digital %s%s card %s%s at I/O "
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"address 0x%X, memory address 0x%lX, "
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"memory size 0x%X, irq %d\n",
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dep->de_name,
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we_type & WET_BRD_16BIT ? "16-bit " : "",
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we_type & WET_ETHERNET ? "Ethernet" :
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we_type & WET_STARLAN ? "Starlan" : "Network",
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we_type & WET_INTERF_CHIP ? "with an interface chip " : "",
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we_type & WET_SLT_16BIT ? "in a 16-bit slot " : "",
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dep->de_base_port, dep->de_linmem, dep->de_ramsize,
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dep->de_irq);
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}
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dep->de_offset_page= 0; /* Shared memory starts at 0 */
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/* Allocate one send buffer (1.5KB) per 8KB of on board memory. */
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sendq_nr= dep->de_ramsize / 0x2000;
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if (sendq_nr < 1)
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sendq_nr= 1;
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else if (sendq_nr > SENDQ_NR)
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sendq_nr= SENDQ_NR;
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dep->de_sendq_nr= sendq_nr;
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for (i= 0; i<sendq_nr; i++)
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dep->de_sendq[i].sq_sendpage= i*SENDQ_PAGES;
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dep->de_startpage= i*SENDQ_PAGES;
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dep->de_stoppage= dep->de_ramsize / DP_PAGESIZE;
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}
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/*===========================================================================*
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* we_stop *
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*===========================================================================*/
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static void we_stop(dep)
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dpeth_t *dep;
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{
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if (dep->de_16bit)
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outb_we(dep, EPL_LAAR, E_LAAR_A19 | E_LAAR_LAN16E);
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outb_we(dep, EPL_MSR, E_MSR_RESET);
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outb_we(dep, EPL_MSR, 0);
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}
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/*===========================================================================*
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* we_aliasing *
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*===========================================================================*/
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static int we_aliasing(dep)
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dpeth_t *dep;
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{
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/* Determine whether wd8003 hardware performs register aliasing. This implies
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* an old WD8003E board. */
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if (inb_we(dep, EPL_REG1) != inb_we(dep, EPL_EA1))
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return 0;
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if (inb_we(dep, EPL_REG2) != inb_we(dep, EPL_EA2))
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return 0;
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if (inb_we(dep, EPL_REG3) != inb_we(dep, EPL_EA3))
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return 0;
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if (inb_we(dep, EPL_REG4) != inb_we(dep, EPL_EA4))
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return 0;
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if (inb_we(dep, EPL_REG7) != inb_we(dep, EPL_CHKSUM))
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return 0;
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return 1;
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}
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/*===========================================================================*
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* we_interface_chip *
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*===========================================================================*/
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static int we_interface_chip(dep)
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dpeth_t *dep;
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{
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/* Determine if the board has an interface chip. */
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outb_we(dep, EPL_GP2, 0x35);
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if (inb_we(dep, EPL_GP2) != 0x35)
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return 0;
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outb_we(dep, EPL_GP2, 0x3A);
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if (inb_we(dep, EPL_GP2) != 0x3A)
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return 0;
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return 1;
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}
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/*===========================================================================*
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* we_16bitboard *
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*===========================================================================*/
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static int we_16bitboard(dep)
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dpeth_t *dep;
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{
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/* Determine whether the board is capable of doing 16 bit memory moves.
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* If the 16 bit enable bit is unchangable by software we'll assume an
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* 8 bit board.
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*/
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int icr;
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u8_t tlb;
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icr= inb_we(dep, EPL_ICR);
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outb_we(dep, EPL_ICR, icr ^ E_ICR_16BIT);
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if (inb_we(dep, EPL_ICR) == icr)
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{
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tlb= inb_we(dep, EPL_TLB);
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#if DEBUG
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printf("%s: tlb= 0x%x\n", dep->de_name, tlb);
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#endif
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return tlb == E_TLB_EB || tlb == E_TLB_E ||
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tlb == E_TLB_SMCE || tlb == E_TLB_SMC8216T ||
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tlb == E_TLB_SMC8216C;
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}
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outb_we(dep, EPL_ICR, icr);
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return (icr & E_ICR_16BIT);
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}
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/*===========================================================================*
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* we_16bitslot *
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*===========================================================================*/
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static int we_16bitslot(dep)
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dpeth_t *dep;
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{
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/* Determine if the 16 bit board in plugged into a 16 bit slot. */
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return !!(inb_we(dep, EPL_ICR) & E_ICR_16BIT);
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}
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/*===========================================================================*
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* we_ultra *
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*===========================================================================*/
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static int we_ultra(dep)
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dpeth_t *dep;
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{
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/* Determine if we has an '790 chip. */
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u8_t tlb;
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tlb= inb_we(dep, EPL_TLB);
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return tlb == E_TLB_SMC8216T || tlb == E_TLB_SMC8216C;
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}
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#endif /* ENABLE_WDETH */
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/*
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* $PchId: wdeth.c,v 1.10 2003/09/10 19:31:50 philip Exp $
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*/
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