merge in hp300 support from Utah

[unix-history] / usr / src / sys / hp300 / stand / dcm.c

/*
* Copyright (c) 1988 University of Utah.
* Copyright (c) 1990 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* the Systems Programming Group of the University of Utah Computer
* Science Department.
*
* %sccs.include.redist.c%
*
*      @(#)dcm.c       7.1 (Berkeley) %G%
*/

#ifdef DCMCONSOLE
#include "param.h"
#include "machine/cons.h"
#include "../hpdev/device.h"
#include "../hpdev/dcmreg.h"

#define CONSPORT        (1)
struct dcmdevice *CONSOLE = NULL;

dcmprobe(cp)
       struct consdev *cp;
{
       extern struct hp_hw sc_table[];
       register struct hp_hw *hw;
       register struct dcmdevice *dcm;

       for (hw = sc_table; hw < &sc_table[MAX_CTLR]; hw++)
               if (hw->hw_type == COMMDCM && !badaddr((caddr_t)hw->hw_addr))
                       break;
       if (hw->hw_type != COMMDCM) {
               cp->cn_pri = CN_DEAD;
               return;
       }
       CONSOLE = (struct dcmdevice *)hw->hw_addr;

       dcm = CONSOLE;
       switch (dcm->dcm_rsid) {
       case DCMID:
               cp->cn_pri = CN_NORMAL;
               break;
       case DCMID|DCMCON:
               cp->cn_pri = CN_REMOTE;
               break;
       default:
               cp->cn_pri = CN_DEAD;
               break;
       }
}

dcminit(cp)
       struct consdev *cp;
{
       register struct dcmdevice *dcm = CONSOLE;
       register int port = CONSPORT;

       dcm->dcm_ic = IC_ID;
       while (dcm->dcm_thead[port].ptr != dcm->dcm_ttail[port].ptr)
               ;
       dcm->dcm_data[port].dcm_baud = BR_9600;
       dcm->dcm_data[port].dcm_conf = LC_8BITS | LC_1STOP;
       SEM_LOCK(dcm);
       dcm->dcm_cmdtab[port].dcm_data |= CT_CON;
       dcm->dcm_cr |= (1 << port);
       SEM_UNLOCK(dcm);
       DELAY(15000);
}

#ifndef SMALL
dcmgetchar()
{
       register struct dcmdevice *dcm = CONSOLE;
       register struct dcmrfifo *fifo;
       register struct dcmpreg *pp;
       register unsigned head;
       int c, stat, port;

       port = CONSPORT;
       pp = dcm_preg(dcm, port);
       head = pp->r_head & RX_MASK;
       if (head == (pp->r_tail & RX_MASK))
               return(0);
       fifo = &dcm->dcm_rfifos[3-port][head>>1];
       c = fifo->data_char;
       stat = fifo->data_stat;
       pp->r_head = (head + 2) & RX_MASK;
       SEM_LOCK(dcm);
       stat = dcm->dcm_iir;
       SEM_UNLOCK(dcm);
       return(c);
}
#else
dcmgetchar()
{
       return(0);
}
#endif

dcmputchar(c)
       register int c;
{
       register struct dcmdevice *dcm = CONSOLE;
       register struct dcmpreg *pp;
       register int timo;
       unsigned tail;
       int port, stat;

       port = CONSPORT;
       pp = dcm_preg(dcm, port);
       tail = pp->t_tail & TX_MASK;
       timo = 50000;
       while (tail != (pp->t_head & TX_MASK) && --timo)
               ;
       dcm->dcm_tfifos[3-port][tail].data_char = c;
       pp->t_tail = tail = (tail + 1) & TX_MASK;
       SEM_LOCK(dcm);
       dcm->dcm_cmdtab[port].dcm_data |= CT_TX;
       dcm->dcm_cr |= (1 << port);
       SEM_UNLOCK(dcm);
       timo = 1000000;
       while (tail != (pp->t_head & TX_MASK) && --timo)
               ;
       SEM_LOCK(dcm);
       stat = dcm->dcm_iir;
       SEM_UNLOCK(dcm);
}
#endif