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344
study/linux-travel/MINIX-1.5/1.5/Source/amoeba/kernel/dp8390.c
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344
study/linux-travel/MINIX-1.5/1.5/Source/amoeba/kernel/dp8390.c
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#include "kernel.h"
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#ifndef NONET
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#include "minix/com.h"
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#include "internet.h"
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#include "etherformat.h"
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#include "dp8390.h"
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#include "dp8390info.h"
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#include "dp8390stat.h"
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#include "assert.h"
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/* macros for device I/O */
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#define input(devaddr, dp_register) \
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in_byte((vir_bytes)&((union dp8390reg *) devaddr)->dp_pg0rd.dp_register)
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#define input1(devaddr, dp_register) \
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in_byte((vir_bytes)&((union dp8390reg *) devaddr)->dp_pg1rdwr.dp_register)
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#define output(devaddr, dp_register, value) \
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out_byte((vir_bytes)&((union dp8390reg *) devaddr)->dp_pg0wr.dp_register, value)
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#define output1(devaddr, dp_register, value) \
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out_byte((vir_bytes)&((union dp8390reg *) devaddr)->dp_pg1rdwr.dp_register, value)
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#define MAX_WAIT 10000
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#ifdef DPSTAT
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struct dpstat dpstat;
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#endif
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static int (*bufread)(); /* call when packet came in */
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static int (*bufwritten)(); /* call when packet has been written */
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static disabled;
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static phys_bytes curopacket; /* packet being transmitted */
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static phys_bytes Curbuff; /* address of next read buffer to release */
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static
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chipinit(myaddr)
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Eth_addr *myaddr;
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{
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register vir_bytes device;
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device = dp8390info.dpi_devaddr;
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output(device, dp_cr, CR_PS_P0|CR_DM_ABORT); /* back to main register set */
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output(device, dp_pstart, dp8390info.dpi_pstart);
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output(device, dp_pstop, dp8390info.dpi_pstop);
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output(device, dp_bnry, dp8390info.dpi_pstart);
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output(device, dp_rcr, RCR_MON);
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output(device, dp_tcr, TCR_NORMAL);
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output(device, dp_dcr, DCR_BYTEWIDE|DCR_8BYTES);
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output(device, dp_rbcr0, 0);
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output(device, dp_rbcr1, 0);
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output(device, dp_isr, 0xFF);
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output(device, dp_cr, CR_PS_P1|CR_DM_ABORT); /* switch to register set 1 */
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output1(device, dp_par0, myaddr->e[0]);
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output1(device, dp_par1, myaddr->e[1]);
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output1(device, dp_par2, myaddr->e[2]);
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output1(device, dp_par3, myaddr->e[3]);
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output1(device, dp_par4, myaddr->e[4]);
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output1(device, dp_par5, myaddr->e[5]);
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output1(device, dp_curr, dp8390info.dpi_pstart+1);
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output1(device, dp_cr, CR_PS_P0|CR_DM_ABORT);
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output(device, dp_rcr, RCR_AB);
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input(device, dp_cntr0);
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input(device, dp_cntr1);
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input(device, dp_cntr2);
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#ifdef TRMTINT
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output(device, dp_imr, IMR_TXEE|IMR_PTXE|IMR_PRXE|IMR_CNTE|IMR_OVWE);
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#endif
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output(device, dp_imr, IMR_PRXE|IMR_CNTE|IMR_OVWE);
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output(device, dp_cr, CR_STA|CR_DM_ABORT); /* fire it up */
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}
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/*
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* Interrupt handling
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*/
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static
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dp_xmit_intr()
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#ifdef TRMTINT
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{
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register tsr;
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if (curopacket == 0) {
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printf("Bogus transmit interrupt\n");
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STINC(ds_btint);
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return;
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}
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tsr = input(dp8390info.dpi_devaddr, dp_tsr);
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if (tsr&TSR_PTX)
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STINC(ds_written); /* It went OK! */
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if (tsr&TSR_DFR)
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STINC(ds_deferred);
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if (tsr&TSR_COL)
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STINC(ds_collisions);
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if (tsr&TSR_ABT)
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STINC(ds_xcollisions);
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if (tsr&TSR_CRS) {
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printf("Ethernet carrier sense lost\n");
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STINC(ds_carlost);
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}
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if (tsr&TSR_FU) {
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printf("Ethernet Fifo Underrun\n");
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STINC(ds_fifo);
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}
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if (tsr&TSR_CDH) {
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printf("Ethernet Heartbeat failure\n");
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STINC(ds_heartbeat);
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}
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if (tsr&TSR_OWC) {
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printf("Ethernet late collision\n");
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STINC(ds_lcol);
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}
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(*bufwritten)(curopacket);
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curopacket = 0;
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}
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#else
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{}
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#endif
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static
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recvintr()
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{
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register vir_bytes device;
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register phys_bytes paddr;
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struct rcvdheader pkthead;
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char pageno, curr, next;
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int length;
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device = dp8390info.dpi_devaddr;
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pageno=input(device, dp_bnry)+1;
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if (pageno == dp8390info.dpi_pstop)
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pageno = dp8390info.dpi_pstart;
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while (!(disabled)) {
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output(device, dp_cr, CR_PS_P1);/* switch to register set 1 */
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curr = input1(device, dp_curr);
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output1(device, dp_cr, CR_PS_P0);/* back to main register set*/
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if (pageno==curr){
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break;
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}
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STINC(ds_read);
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paddr = dp8390info.dpi_membase+(pageno<<8);
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getheader(paddr, &pkthead);
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next = pkthead.rp_next;
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if (pkthead.rp_status&RSR_PRX) {
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if (next < pageno && next > dp8390info.dpi_pstart) {
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/*
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* We copy end of packet to avoid break.
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*/
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phys_copy(dp8390info.dpi_membase+
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(dp8390info.dpi_pstart<<8),
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dp8390info.dpi_membase+
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(dp8390info.dpi_pstop<<8),
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(phys_bytes) (next-dp8390info.dpi_pstart)<<8);
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}
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length = (pkthead.rp_rbcl&0xFF)|(pkthead.rp_rbch<<8);
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Curbuff = paddr + sizeof (pkthead);
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disabled = 1;
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(*bufread)(Curbuff, length-4);
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}
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pageno = pkthead.rp_next;
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if (pageno >= dp8390info.dpi_pstop ||
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pageno < dp8390info.dpi_pstart)
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printf("page no %x\n", pageno);
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/* assert(pageno >= dp8390info.dpi_pstart);
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assert(pageno < dp8390info.dpi_pstop);*/
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}
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}
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static
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cntintr()
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{
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register vir_bytes device;
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int n;
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printf("dp8390: counter overflow\n"); /*DEBUG*/
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device = dp8390info.dpi_devaddr;
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n = input(device, dp_cntr0);
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STADD(ds_fram, n);
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n = input(device, dp_cntr1);
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STADD(ds_crc, n);
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n =input(device, dp_cntr2);
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STADD(ds_lost, n);
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}
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PUBLIC void
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dp8390_int()
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{
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register isr;
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register vir_bytes device;
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device = dp8390info.dpi_devaddr;
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for(isr=input(device, dp_isr); isr&(ISR_OVW|ISR_PRX|ISR_PTX|ISR_CNT);
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isr=input(device, dp_isr)) {
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if (isr&ISR_OVW) {
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printf("OVW, do something\n");
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output(device, dp_isr, ISR_OVW); /* ack */
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}
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if (isr&ISR_PTX) {
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dp_xmit_intr();
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output(device, dp_isr, ISR_PTX); /* ack */
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}
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if (isr&ISR_TXE) {
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dp_xmit_intr();
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output(device, dp_isr, ISR_TXE); /* ack */
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}
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if (isr&ISR_PRX) {
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/*recvintr();*/
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got_packet();
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output(device, dp_isr, ISR_PRX); /* ack */
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}
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if (isr&ISR_CNT) {
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cntintr();
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output(device, dp_isr, ISR_CNT); /* ack */
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}
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}
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}
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eth_init(etheraddr, br, bw)
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Eth_addr *etheraddr;
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int (*br)(), (*bw)();
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{
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bufread = br;
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bufwritten = bw;
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epl_init(); /* activate on board memory */
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chipinit(etheraddr); /* start ethernet controller chip */
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}
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eth_write(bufaddr, bufcnt)
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phys_bytes bufaddr;
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{
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int bpageno;
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register vir_bytes device;
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device = dp8390info.dpi_devaddr;
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/* assert(curopacket==0); */
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assert(((bufaddr-dp8390info.dpi_membase)&0xFF)==0);
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assert(bufcnt >= 60); /* magic Ethernet requirement */
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/* assert(bufcnt <= 1514); /* another one */
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bpageno = ((bufaddr-dp8390info.dpi_membase)>>8) & 0xFF;
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curopacket = bufaddr;
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output(device, dp_tpsr, bpageno);
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output(device, dp_tbcr1, bufcnt>>8);
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output(device, dp_tbcr0, bufcnt&0xFF);
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output(device, dp_cr, CR_TXP); /* there it goes */
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}
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eth_release(bufaddr)
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phys_bytes bufaddr;
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{
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register vir_bytes device;
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register phys_bytes paddr;
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struct rcvdheader pkthead;
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char pageno;
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device = dp8390info.dpi_devaddr;
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paddr = bufaddr-sizeof(pkthead);
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assert(((paddr-dp8390info.dpi_membase)&0xFF)==0);
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getheader(paddr, &pkthead);
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pageno = pkthead.rp_next;
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if (pageno == dp8390info.dpi_pstart)
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pageno = dp8390info.dpi_pstop;
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if (bufaddr != Curbuff)
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panic("eth_release: bad order", NO_NUM);
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output(device, dp_bnry, pageno-1);
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disabled = 0;
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/* recvintr(); */
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}
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phys_bytes
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eth_getbuf()
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{
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int t_cnt;
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register vir_bytes device;
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register tsr;
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device = dp8390info.dpi_devaddr;
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t_cnt = 0;
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while (input(device,dp_cr)&CR_TXP) {
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if (t_cnt++ > MAX_WAIT)
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printf("transmitter frozen\n");
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return (phys_bytes)0;
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}
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#ifndef TRMTINT
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#ifdef DPSTAT
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tsr = input(device, dp_tsr);
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if (tsr&TSR_PTX)
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STINC(ds_written); /* It went OK! */
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if (tsr&TSR_DFR)
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STINC(ds_deferred);
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if (tsr&TSR_COL)
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STINC(ds_collisions);
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if (tsr&TSR_ABT)
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STINC(ds_xcollisions);
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if (tsr&TSR_CRS) {
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printf("Ethernet carrier sense lost\n");
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STINC(ds_carlost);
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}
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if (tsr&TSR_FU) {
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printf("Ethernet Fifo Underrun\n");
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STINC(ds_fifo);
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}
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if (tsr&TSR_CDH) {
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printf("Ethernet Heartbeat failure\n");
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STINC(ds_heartbeat);
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}
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if (tsr&TSR_OWC) {
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printf("Ethernet late collision\n");
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STINC(ds_lcol);
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}
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#endif
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#endif
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return dp8390info.dpi_tbuf; /* return pointer to xmit buffer */
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}
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#else NONET
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PUBLIC void
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dp8390_int()
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{
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}
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#endif NONET
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PUBLIC void
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eth_stp()
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{
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/* called from reboot() (klib88.s) to stop the ethernet */
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#ifndef NONET
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output(dp8390info.dpi_devaddr, dp_cr, CR_STP|CR_DM_ABORT);
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#endif
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}
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