335 lines
7.3 KiB
C
335 lines
7.3 KiB
C
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/*
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ne2000.c
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Driver for the ne2000 ethernet cards. This file contains only the ne2000
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specific code, the rest is in dp8390.c
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Created: March 15, 1994 by Philip Homburg <philip@f-mnx.phicoh.com>
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*/
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#include "../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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#if __minix_vmd
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#include "config.h"
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#endif
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#include "local.h"
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#include "dp8390.h"
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#include "ne2000.h"
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#if ENABLE_NE2000
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#define N 100
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#define MILLIS_TO_TICKS(m) (((m)*HZ/1000)+1)
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_PROTOTYPE( typedef int (*testf_t), (dpeth_t *dep, int pos, u8_t *pat) );
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u8_t pat0[]= { 0x00, 0x00, 0x00, 0x00 };
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u8_t pat1[]= { 0xFF, 0xFF, 0xFF, 0xFF };
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u8_t pat2[]= { 0xA5, 0x5A, 0x69, 0x96 };
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u8_t pat3[]= { 0x96, 0x69, 0x5A, 0xA5 };
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_PROTOTYPE( static int test_8, (dpeth_t *dep, int pos, u8_t *pat) );
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_PROTOTYPE( static int test_16, (dpeth_t *dep, int pos, u8_t *pat) );
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_PROTOTYPE( static void ne_stop, (dpeth_t *dep) );
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_PROTOTYPE( static void milli_delay, (unsigned long millis) );
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/*===========================================================================*
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* ne_probe *
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*===========================================================================*/
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int ne_probe(dep)
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dpeth_t *dep;
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{
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int byte;
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int i;
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int loc1, loc2;
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testf_t f;
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dep->de_dp8390_port= dep->de_base_port + NE_DP8390;
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/* We probe for an ne1000 or an ne2000 by testing whether the
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* on board is reachable through the dp8390. Note that the
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* ne1000 is an 8bit card and has a memory region distict from
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* the 16bit ne2000
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*/
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for (dep->de_16bit= 0; dep->de_16bit < 2; dep->de_16bit++)
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{
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/* Reset the ethernet card */
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byte= inb_ne(dep, NE_RESET);
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milli_delay(2);
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outb_ne(dep, NE_RESET, byte);
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milli_delay(2);
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/* Reset the dp8390 */
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outb_reg0(dep, DP_CR, CR_STP | CR_DM_ABORT);
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for (i= 0; i < 0x1000 && ((inb_reg0(dep, DP_ISR) & ISR_RST) == 0); i++)
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; /* Do nothing */
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/* Check if the dp8390 is really there */
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if ((inb_reg0(dep, DP_CR) & (CR_STP|CR_DM_ABORT)) !=
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(CR_STP|CR_DM_ABORT))
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{
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return 0;
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}
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/* Disable the receiver and init TCR and DCR. */
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outb_reg0(dep, DP_RCR, RCR_MON);
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outb_reg0(dep, DP_TCR, TCR_NORMAL);
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if (dep->de_16bit)
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{
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outb_reg0(dep, DP_DCR, DCR_WORDWIDE | DCR_8BYTES |
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DCR_BMS);
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}
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else
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{
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outb_reg0(dep, DP_DCR, DCR_BYTEWIDE | DCR_8BYTES |
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DCR_BMS);
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}
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if (dep->de_16bit)
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{
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loc1= NE2000_START;
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loc2= NE2000_START + NE2000_SIZE - 4;
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f= test_16;
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}
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else
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{
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loc1= NE1000_START;
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loc2= NE1000_START + NE1000_SIZE - 4;
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f= test_8;
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}
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if (f(dep, loc1, pat0) && f(dep, loc1, pat1) &&
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f(dep, loc1, pat2) && f(dep, loc1, pat3) &&
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f(dep, loc2, pat0) && f(dep, loc2, pat1) &&
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f(dep, loc2, pat2) && f(dep, loc2, pat3))
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{
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/* We don't need a memory segment */
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dep->de_linmem= 0;
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if (!dep->de_pci)
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dep->de_initf= ne_init;
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dep->de_stopf= ne_stop;
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dep->de_prog_IO= 1;
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return 1;
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}
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}
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return 0;
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}
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/*===========================================================================*
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* ne_init *
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*===========================================================================*/
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void ne_init(dep)
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dpeth_t *dep;
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{
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int i;
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int word, sendq_nr;
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/* Setup a transfer to get the ethernet address. */
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if (dep->de_16bit)
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outb_reg0(dep, DP_RBCR0, 6*2);
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else
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outb_reg0(dep, DP_RBCR0, 6);
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outb_reg0(dep, DP_RBCR1, 0);
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outb_reg0(dep, DP_RSAR0, 0);
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outb_reg0(dep, DP_RSAR1, 0);
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outb_reg0(dep, DP_CR, CR_DM_RR | CR_PS_P0 | CR_STA);
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for (i= 0; i<6; i++)
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{
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if (dep->de_16bit)
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{
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word= inw_ne(dep, NE_DATA);
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dep->de_address.ea_addr[i]= word;
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}
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else
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{
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dep->de_address.ea_addr[i] = inb_ne(dep, NE_DATA);
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}
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}
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dep->de_data_port= dep->de_base_port + NE_DATA;
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if (dep->de_16bit)
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{
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dep->de_ramsize= NE2000_SIZE;
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dep->de_offset_page= NE2000_START / DP_PAGESIZE;
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}
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else
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{
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dep->de_ramsize= NE1000_SIZE;
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dep->de_offset_page= NE1000_START / DP_PAGESIZE;
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}
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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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{
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dep->de_sendq[i].sq_sendpage= dep->de_offset_page +
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i*SENDQ_PAGES;
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}
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dep->de_startpage= dep->de_offset_page + i*SENDQ_PAGES;
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dep->de_stoppage= dep->de_offset_page + dep->de_ramsize / DP_PAGESIZE;
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/* Can't override the default IRQ. */
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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: NE%d000 at %X:%d\n",
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dep->de_name, dep->de_16bit ? 2 : 1,
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dep->de_base_port, dep->de_irq);
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}
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else
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{
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printf("%s: Novell NE%d000 ethernet card at I/O address "
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"0x%X, memory size 0x%X, irq %d\n",
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dep->de_name, dep->de_16bit ? 2 : 1,
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dep->de_base_port, dep->de_ramsize, dep->de_irq);
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}
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}
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/*===========================================================================*
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* test_8 *
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*===========================================================================*/
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static int test_8(dep, pos, pat)
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dpeth_t *dep;
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int pos;
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u8_t *pat;
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{
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u8_t buf[4];
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int i;
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int r;
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outb_reg0(dep, DP_ISR, 0xFF);
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/* Setup a transfer to put the pattern. */
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outb_reg0(dep, DP_RBCR0, 4);
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outb_reg0(dep, DP_RBCR1, 0);
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outb_reg0(dep, DP_RSAR0, pos & 0xFF);
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outb_reg0(dep, DP_RSAR1, pos >> 8);
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outb_reg0(dep, DP_CR, CR_DM_RW | CR_PS_P0 | CR_STA);
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for (i= 0; i<4; i++)
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outb_ne(dep, NE_DATA, pat[i]);
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for (i= 0; i<N; i++)
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{
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if (inb_reg0(dep, DP_ISR) & ISR_RDC)
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break;
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}
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if (i == N)
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{
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if (debug)
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{
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printf("%s: NE1000 remote DMA test failed\n",
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dep->de_name);
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}
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return 0;
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}
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outb_reg0(dep, DP_RBCR0, 4);
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outb_reg0(dep, DP_RBCR1, 0);
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outb_reg0(dep, DP_RSAR0, pos & 0xFF);
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outb_reg0(dep, DP_RSAR1, pos >> 8);
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outb_reg0(dep, DP_CR, CR_DM_RR | CR_PS_P0 | CR_STA);
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for (i= 0; i<4; i++)
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buf[i]= inb_ne(dep, NE_DATA);
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r= (memcmp(buf, pat, 4) == 0);
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return r;
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}
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/*===========================================================================*
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* test_16 *
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*===========================================================================*/
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static int test_16(dep, pos, pat)
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dpeth_t *dep;
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int pos;
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u8_t *pat;
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{
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u8_t buf[4];
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int i;
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int r;
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outb_reg0(dep, DP_ISR, 0xFF);
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/* Setup a transfer to put the pattern. */
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outb_reg0(dep, DP_RBCR0, 4);
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outb_reg0(dep, DP_RBCR1, 0);
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outb_reg0(dep, DP_RSAR0, pos & 0xFF);
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outb_reg0(dep, DP_RSAR1, pos >> 8);
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outb_reg0(dep, DP_CR, CR_DM_RW | CR_PS_P0 | CR_STA);
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for (i= 0; i<4; i += 2)
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{
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outw_ne(dep, NE_DATA, *(u16_t *)(pat+i));
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}
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for (i= 0; i<N; i++)
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{
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if (inb_reg0(dep, DP_ISR) & ISR_RDC)
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break;
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}
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if (i == N)
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{
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if (debug)
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{
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printf("%s: NE2000 remote DMA test failed\n",
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dep->de_name);
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}
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return 0;
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}
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outb_reg0(dep, DP_RBCR0, 4);
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outb_reg0(dep, DP_RBCR1, 0);
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outb_reg0(dep, DP_RSAR0, pos & 0xFF);
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outb_reg0(dep, DP_RSAR1, pos >> 8);
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outb_reg0(dep, DP_CR, CR_DM_RR | CR_PS_P0 | CR_STA);
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for (i= 0; i<4; i += 2)
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{
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*(u16_t *)(buf+i)= inw_ne(dep, NE_DATA);
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}
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r= (memcmp(buf, pat, 4) == 0);
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return r;
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}
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/*===========================================================================*
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* ne_stop *
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*===========================================================================*/
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static void ne_stop(dep)
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dpeth_t *dep;
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{
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int byte;
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/* Reset the ethernet card */
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byte= inb_ne(dep, NE_RESET);
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milli_delay(2);
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outb_ne(dep, NE_RESET, byte);
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}
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static void milli_delay(unsigned long millis)
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{
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tickdelay(MILLIS_TO_TICKS(millis));
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}
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#endif /* ENABLE_NE2000 */
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/*
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* $PchId: ne2000.c,v 1.10 2004/08/03 12:03:00 philip Exp $
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*/
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