int
dartintr(void *arg)
{
struct dartsoftc *sc = arg;
unsigned char isr, imr;
int port;
/* read interrupt status register and mask with imr */
isr = dart_read(sc, DART_ISR);
imr = sc->sc_sv_reg->sv_imr;
if ((isr & imr) == 0) {
/*
* We got an interrupt on a disabled condition (such as TX
* ready change on a disabled port). This should not happen,
* but we have to claim the interrupt anyway.
*/
#if defined(DIAGNOSTIC) && !defined(MULTIPROCESSOR)
printf("%s: spurious interrupt, isr %x imr %x\n",
sc->sc_dev.dv_xname, isr, imr);
#endif
return (1);
}
isr &= imr;
if (isr & IIPCHG) {
unsigned int ip, ipcr;
ip = dart_read(sc, DART_IP);
ipcr = dart_read(sc, DART_IPCR);
dartmodemtrans(sc, ip, ipcr);
return (1);
}
if (isr & (IRXRDYA | ITXRDYA))
port = 0;
#ifdef DIAGNOSTIC
else if ((isr & (IRXRDYB | ITXRDYB)) == 0) {
printf("%s: spurious interrupt, isr %x\n",
sc->sc_dev.dv_xname, isr);
return (1); /* claim it anyway */
}
#endif
else
port = 1;
if (isr & (IRXRDYA | IRXRDYB))
dartrint(sc, port);
if (isr & (ITXRDYA | ITXRDYB))
dartxint(sc, port);
if (isr & (port == A_PORT ? IBRKA : IBRKB))
dart_write(sc, port == A_PORT ? DART_CRA : DART_CRB,
BRKINTRESET);
return (1);
}
int
dartintr(void *arg)
{
struct dartsoftc *sc = arg;
unsigned char isr, imr;
int port;
/* read interrupt status register and mask with imr */
isr = dart_read(sc, DART_ISR);
imr = sc->sc_sv_reg.sv_imr;
if ((isr & imr) == 0) {
/*
* We got an interrupt on a disabled condition (such as TX
* ready change on a disabled port). This should not happen,
* but we have to claim the interrupt anyway.
*/
#ifdef DIAGNOSTIC
printf("dartintr: spurious interrupt, isr %x imr %x\n",
isr, imr);
#endif
return (1);
}
isr &= imr;
if (isr & IIPCHG) {
unsigned int ip, ipcr;
ip = dart_read(sc, DART_IP);
ipcr = dart_read(sc, DART_IPCR);
dartmodemtrans(sc, ip, ipcr);
return (1);
}
if (isr & (IRXRDYA | ITXRDYA))
port = 0;
else if (isr & (IRXRDYB | ITXRDYB))
port = 1;
else {
printf("dartintr: spurious interrupt, isr 0x%08x\n", isr);
return (1); /* claim it anyway */
}
if (isr & (IRXRDYA | IRXRDYB)) {
dartrint(sc, port);
}
if (isr & (ITXRDYA | ITXRDYB)) {
dartxint(sc, port);
}
if ((port == A_PORT && (isr & IBRKA)) ||
(port == B_PORT && (isr & IBRKB))) {
dart_write(sc, port ? DART_CRB : DART_CRA, BRKINTRESET);
}
return (1);
}