1997/0327/pc/ns16552.h (diff list | history)

pc/ns16552.h on 1994/0902
1994/0902		/* * PC specific code for the ns16552. It includes support for the 2 built * in uarts plus up to 5 MP-008 8 uart ISA cards. */ enum { Maxcard= 5, /* max serial cards */ UartFREQ= 1843200, Serial= 0, Modem= 1, }; #define uartwrreg(u,r,v) outb((u)->port + r, (u)->sticky[r] | (v)) #define uartrdreg(u,r) inb((u)->port + r)
1994/1108		void ns16552setup(ulong, ulong, char*);
1997/0327		void ns16552special(int, int, Queue**, Queue**, int (*)(Queue*, int)); void uartclock(void);
1994/0902		/* * definition of an optional serial card */ typedef struct Scard { ISAConf; /* card configuration */ int first; /* number of first port */ } Scard; static Scard *scard[Maxcard]; /* configs for the serial card */ /* power management currently only makes sense on the AT&T safari */ static void uartpower(int dev, int onoff) { switch(dev){ case Modem:
1997/0327		if((*arch->modempower)(onoff) < 0)
1994/0902		print("can't turn %s modem speaker\n", onoff?"on":"off"); break; case Serial:
1997/0327		if((*arch->serialpower)(onoff) < 0)
1994/0902		print("can't turn %s serial port power\n", onoff?"on":"off"); break; } } /* * handle an interrupt to a single uart */ static void
1997/0327		ns16552intrx(Ureg*, void* arg)
1994/0902		{ ns16552intr((ulong)arg); } /* * interrupts from the multiport card, MP-008. A polling port * tells which of 8 devices interrupted. */ static void
1997/0327		mp008intr(Ureg* ureg, void* arg)
1994/0902		{ int i, loops; uchar n; Scard *mp; mp = arg;
1994/1006		for(loops = 0; loops < 1024; loops++){
1994/0902		n = ~inb(mp->mem); if(n == 0) return; for(i = 0; n; i++){ if(n & 1)
1997/0327		ns16552intrx(ureg, (void*)(mp->first+i));
1994/0902		n >>= 1; } } } /* * install the uarts (called by reset) */
1994/1007		void
1994/0902		ns16552install(void) {
1994/1118		int i, j, port, nscard;
1997/0327		char *p, *q;
1994/0902		Scard *sc;
1994/1108		char name[NAMELEN];
1994/1007		static int already;
1994/0902
1994/1007		if(already) return; already = 1;
1994/0902		/* first two ports are always there and always the normal frequency */
1994/1108		ns16552setup(0x3F8, UartFREQ, "eia0");
1997/0327		intrenable(VectorUART0, ns16552intrx, (void*)0, BUSUNKNOWN);
1994/1108		ns16552setup(0x2F8, UartFREQ, "eia1");
1997/0327		intrenable(VectorUART1, ns16552intrx, (void*)1, BUSUNKNOWN); addclock0link(uartclock);
1994/1007		/* set up a serial console */
1997/0327		if(p = getconf("console")){ port = strtol(p, &q, 0); if(p != q && (port == 0 || port == 1)) ns16552special(port, 9600, &kbdq, &printq, kbdcr2nl); }
1994/0902		/* the rest come out of plan9.ini */
1994/1118		nscard = 0;
1994/0902		for(i = 0; i < Maxcard; i++){
1994/1118		sc = scard[nscard] = xalloc(sizeof(Scard));
1994/0902		if(isaconfig("serial", i, sc) == 0){ xfree(sc);
1994/1118		scard[nscard] = 0; continue;
1994/0902		}
1995/0222		if(cistrcmp(sc->type, "MP008") == 0){
1994/0902		/* * port gives base port address for uarts * irq is interrupt * mem is the polling port * size is the number of serial ports on the same polling port * freq is the baud rate generator frequency */ if(sc->size == 0) sc->size = 8; if(sc->freq == 0) sc->freq = UartFREQ; sc->first = nuart;
1997/0327		intrenable(VectorPIC+sc->irq, mp008intr, sc, BUSUNKNOWN);
1994/0902		port = sc->port; for(j=0; j < sc->size; j++){
1994/1118		sprint(name, "eia%d%2.2d", nscard, j);
1994/1108		ns16552setup(port, sc->freq, name);
1994/0902		port += 8; }
1995/0222		} else if(cistrcmp(sc->type, "com") == 0){
1994/0902		/* * port gives base port address for the uart * irq is interrupt * freq is the baud rate generator frequency */
1994/1106		if(sc->freq == 0) sc->freq = UartFREQ;
1994/1118		sprint(name, "eia%d00", nscard);
1994/1108		ns16552setup(sc->port, sc->freq, name);
1997/0327		intrenable(VectorPIC+sc->irq, ns16552intrx, (void*)(nuart-1), BUSUNKNOWN);
1994/0902		}
1994/1118		nscard++;
1994/0902		} }