static int lp_reset(int target)
{
register struct lp_info *lpp;
register char *tmpp;
#ifdef BIOS_PORTS
lpp = &ports[target];
#else
lpp = &ports[port_order[target]];
#endif
LP_CONTROL(LP_SELECT, lpp);
tmpp = (char *)LP_RESET_WAIT;
do {
} while((int)(--tmpp));
LP_CONTROL(LP_SELECT | LP_INIT, lpp);
return LP_STATUS(lpp);
}
int lp_reset(int target)
{
register struct lp_info *lpp;
register char *tmpp;
#ifndef BIOS_PORTS
target = port_order[target];
#endif
lpp = &ports[target];
LP_CONTROL(LP_SELECT, lpp);
tmpp = 0;
while (((int)tmpp) != LP_RESET_WAIT)
tmpp++;
LP_CONTROL(LP_SELECT | LP_INIT, lpp);
return LP_STATUS(lpp);
}
static int lp_char_polled(char c, unsigned int target)
{
int wait;
register struct lp_info *lpp;
#ifdef BIOS_PORTS
lpp = &ports[target];
#else
lpp = &ports[port_order[target]];
#endif
{
register char *statusp;
/* safety checks */
statusp = (char *) LP_STATUS(lpp);
/* safety checks, note that LP_ERROR and LP_SELECTED
* are inverted signals */
if (((int)statusp) & LP_OUTOFPAPER) { /* printer out of paper */
printk("lp%d: out of paper\n", target);
return 0;
}
#if 0
if (!(((int)statusp) & LP_SELECTED)) { /* printer offline */
printk("lp%d: printer offline\n", target);
return 0;
}
#else
wait = LP_CHAR_WAIT + 1;
while (!(((int)(statusp = (char *)LP_STATUS(lpp))) & LP_SELECTED))
/* while not ready do busy loop */
{
if(!--wait) {
printk("lp%d: timed out\n", target);
return 0;
}
#if NEED_RESCHED
if (need_resched)
schedule();
#endif
}
#endif
if (!(((int)statusp) & LP_ERROR)) { /* printer error */
printk("lp%d: printer error\n", target);
return 0;
}
}
/* send character to port */
outb_p((unsigned char) c, lpp->io);
{
register char *waitp;
/* 5 us delay */
waitp = 0;
while (((int)(waitp++)) != LP_STROBE_WAIT)
/* Do nothing */ ;
/* strobe high */
LP_CONTROL(LP_SELECT | LP_INIT | LP_STROBE, lpp);
/* strobe low */
LP_CONTROL(LP_SELECT | LP_INIT, lpp);
/* 5 us delay */
while (waitp--)
/* Do nothing */ ;
}
return 1;
}