ref: d916a4c3823f55227ffae35738c2497256e307b5
dir: /os/pc/devi82365.c/
#include "u.h"
#include "../port/lib.h"
#include "mem.h"
#include "dat.h"
#include "fns.h"
#include "../port/error.h"
#include "io.h"
/*
* Intel 82365SL PCIC controller and compatibles.
*/
enum
{
/*
* registers indices
*/
Rid= 0x0, /* identification and revision */
Ris= 0x1, /* interface status */
Rpc= 0x2, /* power control */
Foutena= (1<<7), /* output enable */
Fautopower= (1<<5), /* automatic power switching */
Fcardena= (1<<4), /* PC card enable */
Rigc= 0x3, /* interrupt and general control */
Fiocard= (1<<5), /* I/O card (vs memory) */
Fnotreset= (1<<6), /* reset if not set */
FSMIena= (1<<4), /* enable change interrupt on SMI */
Rcsc= 0x4, /* card status change */
Rcscic= 0x5, /* card status change interrupt config */
Fchangeena= (1<<3), /* card changed */
Fbwarnena= (1<<1), /* card battery warning */
Fbdeadena= (1<<0), /* card battery dead */
Rwe= 0x6, /* address window enable */
Fmem16= (1<<5), /* use A23-A12 to decode address */
Rio= 0x7, /* I/O control */
Fwidth16= (1<<0), /* 16 bit data width */
Fiocs16= (1<<1), /* IOCS16 determines data width */
Fzerows= (1<<2), /* zero wait state */
Ftiming= (1<<3), /* timing register to use */
Riobtm0lo= 0x8, /* I/O address 0 start low byte */
Riobtm0hi= 0x9, /* I/O address 0 start high byte */
Riotop0lo= 0xa, /* I/O address 0 stop low byte */
Riotop0hi= 0xb, /* I/O address 0 stop high byte */
Riobtm1lo= 0xc, /* I/O address 1 start low byte */
Riobtm1hi= 0xd, /* I/O address 1 start high byte */
Riotop1lo= 0xe, /* I/O address 1 stop low byte */
Riotop1hi= 0xf, /* I/O address 1 stop high byte */
Rmap= 0x10, /* map 0 */
/*
* CL-PD67xx extension registers
*/
Rmisc1= 0x16, /* misc control 1 */
F5Vdetect= (1<<0),
Fvcc3V= (1<<1),
Fpmint= (1<<2),
Fpsirq= (1<<3),
Fspeaker= (1<<4),
Finpack= (1<<7),
Rfifo= 0x17, /* fifo control */
Fflush= (1<<7), /* flush fifo */
Rmisc2= 0x1E, /* misc control 2 */
Flowpow= (1<<1), /* low power mode */
Rchipinfo= 0x1F, /* chip information */
Ratactl= 0x26, /* ATA control */
/*
* offsets into the system memory address maps
*/
Mbtmlo= 0x0, /* System mem addr mapping start low byte */
Mbtmhi= 0x1, /* System mem addr mapping start high byte */
F16bit= (1<<7), /* 16-bit wide data path */
Mtoplo= 0x2, /* System mem addr mapping stop low byte */
Mtophi= 0x3, /* System mem addr mapping stop high byte */
Ftimer1= (1<<6), /* timer set 1 */
Mofflo= 0x4, /* Card memory offset address low byte */
Moffhi= 0x5, /* Card memory offset address high byte */
Fregactive= (1<<6), /* attribute memory */
/*
* configuration registers - they start at an offset in attribute
* memory found in the CIS.
*/
Rconfig= 0,
Creset= (1<<7), /* reset device */
Clevel= (1<<6), /* level sensitive interrupt line */
Cirq= (1<<2), /* IRQ enable */
Cdecode= (1<<1), /* address decode */
Cfunc= (1<<0), /* function enable */
Riobase0= 5,
Riobase1= 6,
Riosize= 9,
};
#define MAP(x,o) (Rmap + (x)*0x8 + o)
typedef struct I82365 I82365;
/* a controller */
enum
{
Ti82365,
Tpd6710,
Tpd6720,
Tvg46x,
};
struct I82365
{
int type;
int dev;
int nslot;
int xreg; /* index register address */
int dreg; /* data register address */
int irq;
};
static I82365 *controller[4];
static int ncontroller;
static PCMslot *slot;
static PCMslot *lastslot;
static nslot;
static void i82365intr(Ureg*, void*);
static int pcmio(int, ISAConf*);
static long pcmread(int, int, void*, long, vlong);
static long pcmwrite(int, int, void*, long, vlong);
static void i82365dump(PCMslot*);
/*
* reading and writing card registers
*/
static uchar
rdreg(PCMslot *pp, int index)
{
outb(((I82365*)pp->cp)->xreg, pp->base + index);
return inb(((I82365*)pp->cp)->dreg);
}
static void
wrreg(PCMslot *pp, int index, uchar val)
{
outb(((I82365*)pp->cp)->xreg, pp->base + index);
outb(((I82365*)pp->cp)->dreg, val);
}
/*
* get info about card
*/
static void
slotinfo(PCMslot *pp)
{
uchar isr;
isr = rdreg(pp, Ris);
pp->occupied = (isr & (3<<2)) == (3<<2);
pp->powered = isr & (1<<6);
pp->battery = (isr & 3) == 3;
pp->wrprot = isr & (1<<4);
pp->busy = isr & (1<<5);
pp->msec = TK2MS(MACHP(0)->ticks);
}
static int
vcode(int volt)
{
switch(volt){
case 5:
return 1;
case 12:
return 2;
default:
return 0;
}
}
/*
* enable the slot card
*/
static void
slotena(PCMslot *pp)
{
if(pp->enabled)
return;
/* power up and unreset, wait's are empirical (???) */
wrreg(pp, Rpc, Fautopower|Foutena|Fcardena);
delay(300);
wrreg(pp, Rigc, 0);
delay(100);
wrreg(pp, Rigc, Fnotreset);
delay(5000);
/* get configuration */
slotinfo(pp);
if(pp->occupied){
pcmcisread(pp);
pp->enabled = 1;
} else
wrreg(pp, Rpc, Fautopower);
}
/*
* disable the slot card
*/
static void
slotdis(PCMslot *pp)
{
wrreg(pp, Rpc, 0); /* turn off card power */
wrreg(pp, Rwe, 0); /* no windows */
pp->enabled = 0;
}
/*
* status change interrupt
*/
static void
i82365intr(Ureg *, void *)
{
uchar csc, was;
PCMslot *pp;
if(slot == 0)
return;
for(pp = slot; pp < lastslot; pp++){
csc = rdreg(pp, Rcsc);
was = pp->occupied;
slotinfo(pp);
if(csc & (1<<3) && was != pp->occupied){
if(!pp->occupied)
slotdis(pp);
}
}
}
enum
{
Mshift= 12,
Mgran= (1<<Mshift), /* granularity of maps */
Mmask= ~(Mgran-1), /* mask for address bits important to the chip */
};
/*
* get a map for pc card region, return corrected len
*/
PCMmap*
pcmmap(int slotno, ulong offset, int len, int attr)
{
PCMslot *pp;
uchar we, bit;
PCMmap *m, *nm;
int i;
ulong e;
pp = slot + slotno;
lock(&pp->mlock);
/* convert offset to granularity */
if(len <= 0)
len = 1;
e = ROUND(offset+len, Mgran);
offset &= Mmask;
len = e - offset;
/* look for a map that covers the right area */
we = rdreg(pp, Rwe);
bit = 1;
nm = 0;
for(m = pp->mmap; m < &pp->mmap[nelem(pp->mmap)]; m++){
if((we & bit))
if(m->attr == attr)
if(offset >= m->ca && e <= m->cea){
m->ref++;
unlock(&pp->mlock);
return m;
}
bit <<= 1;
if(nm == 0 && m->ref == 0)
nm = m;
}
m = nm;
if(m == 0){
unlock(&pp->mlock);
return 0;
}
/* if isa space isn't big enough, free it and get more */
if(m->len < len){
if(m->isa){
umbfree(m->isa, m->len);
m->len = 0;
}
m->isa = PADDR(umbmalloc(0, len, Mgran));
if(m->isa == 0){
print("pcmmap: out of isa space\n");
unlock(&pp->mlock);
return 0;
}
m->len = len;
}
/* set up new map */
m->ca = offset;
m->cea = m->ca + m->len;
m->attr = attr;
i = m-pp->mmap;
bit = 1<<i;
wrreg(pp, Rwe, we & ~bit); /* disable map before changing it */
wrreg(pp, MAP(i, Mbtmlo), m->isa>>Mshift);
wrreg(pp, MAP(i, Mbtmhi), (m->isa>>(Mshift+8)) | F16bit);
wrreg(pp, MAP(i, Mtoplo), (m->isa+m->len-1)>>Mshift);
wrreg(pp, MAP(i, Mtophi), ((m->isa+m->len-1)>>(Mshift+8)));
offset -= m->isa;
offset &= (1<<25)-1;
offset >>= Mshift;
wrreg(pp, MAP(i, Mofflo), offset);
wrreg(pp, MAP(i, Moffhi), (offset>>8) | (attr ? Fregactive : 0));
wrreg(pp, Rwe, we | bit); /* enable map */
m->ref = 1;
unlock(&pp->mlock);
return m;
}
void
pcmunmap(int slotno, PCMmap* m)
{
PCMslot *pp;
pp = slot + slotno;
lock(&pp->mlock);
m->ref--;
unlock(&pp->mlock);
}
static void
increfp(PCMslot *pp)
{
lock(pp);
if(pp->ref++ == 0)
slotena(pp);
unlock(pp);
}
static void
decrefp(PCMslot *pp)
{
lock(pp);
if(pp->ref-- == 1)
slotdis(pp);
unlock(pp);
}
/*
* look for a card whose version contains 'idstr'
*/
static int
pcmcia_pcmspecial(char *idstr, ISAConf *isa)
{
PCMslot *pp;
extern char *strstr(char*, char*);
int enabled;
for(pp = slot; pp < lastslot; pp++){
if(pp->special)
continue; /* already taken */
/*
* make sure we don't power on cards when we already know what's
* in them. We'll reread every two minutes if necessary
*/
enabled = 0;
if (pp->msec == ~0 || TK2MS(MACHP(0)->ticks) - pp->msec > 120000){
increfp(pp);
enabled++;
}
if(pp->occupied) {
if(strstr(pp->verstr, idstr)){
if (!enabled){
enabled = 1;
increfp(pp);
}
if(isa == 0 || pcmio(pp->slotno, isa) == 0){
pp->special = 1;
return pp->slotno;
}
}
} else
pp->special = 1;
if (enabled)
decrefp(pp);
}
return -1;
}
static void
pcmcia_pcmspecialclose(int slotno)
{
PCMslot *pp;
if(slotno >= nslot)
panic("pcmspecialclose");
pp = slot + slotno;
pp->special = 0;
decrefp(pp);
}
enum
{
Qdir,
Qmem,
Qattr,
Qctl,
Nents = 3,
};
#define SLOTNO(c) ((ulong)((c->qid.path>>8)&0xff))
#define TYPE(c) ((ulong)(c->qid.path&0xff))
#define QID(s,t) (((s)<<8)|(t))
static int
pcmgen(Chan *c, char*, Dirtab *, int , int i, Dir *dp)
{
int slotno;
Qid qid;
long len;
PCMslot *pp;
if(i == DEVDOTDOT){
mkqid(&qid, Qdir, 0, QTDIR);
devdir(c, qid, "#y", 0, eve, 0555, dp);
return 1;
}
if(i >= Nents*nslot)
return -1;
slotno = i/Nents;
pp = slot + slotno;
len = 0;
switch(i%Nents){
case 0:
qid.path = QID(slotno, Qmem);
snprint(up->genbuf, sizeof up->genbuf, "pcm%dmem", slotno);
len = pp->memlen;
break;
case 1:
qid.path = QID(slotno, Qattr);
snprint(up->genbuf, sizeof up->genbuf, "pcm%dattr", slotno);
len = pp->memlen;
break;
case 2:
qid.path = QID(slotno, Qctl);
snprint(up->genbuf, sizeof up->genbuf, "pcm%dctl", slotno);
break;
}
qid.vers = 0;
qid.type = QTFILE;
devdir(c, qid, up->genbuf, len, eve, 0660, dp);
return 1;
}
static char *chipname[] =
{
[Ti82365] "Intel 82365SL",
[Tpd6710] "Cirrus Logic CL-PD6710",
[Tpd6720] "Cirrus Logic CL-PD6720",
[Tvg46x] "Vadem VG-46x",
};
static I82365*
i82365probe(int x, int d, int dev)
{
uchar c, id;
I82365 *cp;
ISAConf isa;
int i, nslot;
outb(x, Rid + (dev<<7));
id = inb(d);
if((id & 0xf0) != 0x80)
return 0; /* not a memory & I/O card */
if((id & 0x0f) == 0x00)
return 0; /* no revision number, not possible */
cp = xalloc(sizeof(I82365));
cp->xreg = x;
cp->dreg = d;
cp->dev = dev;
cp->type = Ti82365;
cp->nslot = 2;
switch(id){
case 0x82:
case 0x83:
case 0x84:
/* could be a cirrus */
outb(x, Rchipinfo + (dev<<7));
outb(d, 0);
c = inb(d);
if((c & 0xc0) != 0xc0)
break;
c = inb(d);
if((c & 0xc0) != 0x00)
break;
if(c & 0x20){
cp->type = Tpd6720;
} else {
cp->type = Tpd6710;
cp->nslot = 1;
}
/* low power mode */
outb(x, Rmisc2 + (dev<<7));
c = inb(d);
outb(d, c & ~Flowpow);
break;
}
/* if it's not a Cirrus, it could be a Vadem... */
if(cp->type == Ti82365){
/* unlock the Vadem extended regs */
outb(x, 0x0E + (dev<<7));
outb(x, 0x37 + (dev<<7));
/* make the id register show the Vadem id */
outb(x, 0x3A + (dev<<7));
c = inb(d);
outb(d, c|0xC0);
outb(x, Rid + (dev<<7));
c = inb(d);
if(c & 0x08)
cp->type = Tvg46x;
/* go back to Intel compatible id */
outb(x, 0x3A + (dev<<7));
c = inb(d);
outb(d, c & ~0xC0);
}
memset(&isa, 0, sizeof(ISAConf));
if(isaconfig("pcmcia", ncontroller, &isa) && isa.irq)
cp->irq = isa.irq;
else
cp->irq = IrqPCMCIA;
for(i = 0; i < isa.nopt; i++){
if(cistrncmp(isa.opt[i], "nslot=", 6))
continue;
nslot = strtol(&isa.opt[i][6], nil, 0);
if(nslot > 0 && nslot <= 2)
cp->nslot = nslot;
}
controller[ncontroller++] = cp;
return cp;
}
static void
i82365dump(PCMslot *pp)
{
int i;
for(i = 0; i < 0x40; i++){
if((i&0x0F) == 0)
print("\n%2.2uX: ", i);
print("%2.2uX ", rdreg(pp, i));
if(((i+1) & 0x0F) == 0x08)
print(" - ");
}
print("\n");
}
/*
* set up for slot cards
*/
void
devi82365link(void)
{
static int already;
int i, j;
I82365 *cp;
PCMslot *pp;
char buf[32], *p;
if(already)
return;
already = 1;
if((p=getconf("pcmcia0")) && strncmp(p, "disabled", 8)==0)
return;
if(_pcmspecial)
return;
/* look for controllers if the ports aren't already taken */
if(ioalloc(0x3E0, 2, 0, "i82365.0") >= 0){
i82365probe(0x3E0, 0x3E1, 0);
i82365probe(0x3E0, 0x3E1, 1);
if(ncontroller == 0)
iofree(0x3E0);
}
if(ioalloc(0x3E2, 2, 0, "i82365.1") >= 0){
i = ncontroller;
i82365probe(0x3E2, 0x3E3, 0);
i82365probe(0x3E2, 0x3E3, 1);
if(ncontroller == i)
iofree(0x3E2);
}
if(ncontroller == 0)
return;
_pcmspecial = pcmcia_pcmspecial;
_pcmspecialclose = pcmcia_pcmspecialclose;
for(i = 0; i < ncontroller; i++)
nslot += controller[i]->nslot;
slot = xalloc(nslot * sizeof(PCMslot));
lastslot = slot;
for(i = 0; i < ncontroller; i++){
cp = controller[i];
print("#y%d: %d slot %s: port 0x%uX irq %d\n",
i, cp->nslot, chipname[cp->type], cp->xreg, cp->irq);
for(j = 0; j < cp->nslot; j++){
pp = lastslot++;
pp->slotno = pp - slot;
pp->memlen = 64*MB;
pp->base = (cp->dev<<7) | (j<<6);
pp->cp = cp;
pp->msec = ~0;
pp->verstr[0] = 0;
slotdis(pp);
/* interrupt on status change */
wrreg(pp, Rcscic, (cp->irq<<4) | Fchangeena);
rdreg(pp, Rcsc);
}
/* for card management interrupts */
snprint(buf, sizeof buf, "i82365.%d", i);
intrenable(cp->irq, i82365intr, 0, BUSUNKNOWN, buf);
}
}
static Chan*
i82365attach(char *spec)
{
return devattach('y', spec);
}
static Walkqid*
i82365walk(Chan *c, Chan *nc, char **name, int nname)
{
return devwalk(c, nc, name, nname, 0, 0, pcmgen);
}
static int
i82365stat(Chan *c, uchar *db, int n)
{
return devstat(c, db, n, 0, 0, pcmgen);
}
static Chan*
i82365open(Chan *c, int omode)
{
if(c->qid.type & QTDIR){
if(omode != OREAD)
error(Eperm);
} else
increfp(slot + SLOTNO(c));
c->mode = openmode(omode);
c->flag |= COPEN;
c->offset = 0;
return c;
}
static void
i82365close(Chan *c)
{
if(c->flag & COPEN)
if((c->qid.type & QTDIR) == 0)
decrefp(slot+SLOTNO(c));
}
/* a memmove using only bytes */
static void
memmoveb(uchar *to, uchar *from, int n)
{
while(n-- > 0)
*to++ = *from++;
}
/* a memmove using only shorts & bytes */
static void
memmoves(uchar *to, uchar *from, int n)
{
ushort *t, *f;
if((((ulong)to) & 1) || (((ulong)from) & 1) || (n & 1)){
while(n-- > 0)
*to++ = *from++;
} else {
n = n/2;
t = (ushort*)to;
f = (ushort*)from;
while(n-- > 0)
*t++ = *f++;
}
}
static long
pcmread(int slotno, int attr, void *a, long n, vlong off)
{
int i, len;
PCMmap *m;
uchar *ac;
PCMslot *pp;
ulong offset = off;
pp = slot + slotno;
if(pp->memlen < offset)
return 0;
if(pp->memlen < offset + n)
n = pp->memlen - offset;
m = 0;
if(waserror()){
if(m)
pcmunmap(pp->slotno, m);
nexterror();
}
ac = a;
for(len = n; len > 0; len -= i){
m = pcmmap(pp->slotno, offset, 0, attr);
if(m == 0)
error("cannot map PCMCIA card");
if(offset + len > m->cea)
i = m->cea - offset;
else
i = len;
memmoveb(ac, KADDR(m->isa + offset - m->ca), i);
pcmunmap(pp->slotno, m);
offset += i;
ac += i;
}
poperror();
return n;
}
static long
i82365read(Chan *c, void *a, long n, vlong off)
{
char *p, *buf, *e;
PCMslot *pp;
ulong offset = off;
switch(TYPE(c)){
case Qdir:
return devdirread(c, a, n, 0, 0, pcmgen);
case Qmem:
case Qattr:
return pcmread(SLOTNO(c), TYPE(c) == Qattr, a, n, off);
case Qctl:
buf = p = malloc(READSTR);
e = p + READSTR;
pp = slot + SLOTNO(c);
buf[0] = 0;
if(pp->occupied){
p = seprint(p, e, "occupied\n");
if(pp->verstr[0])
p = seprint(p, e, "version %s\n", pp->verstr);
}
if(pp->enabled)
p = seprint(p, e, "enabled\n");
if(pp->powered)
p = seprint(p, e, "powered\n");
if(pp->configed)
p = seprint(p, e, "configed\n");
if(pp->wrprot)
p = seprint(p, e, "write protected\n");
if(pp->busy)
p = seprint(p, e, "busy\n");
seprint(p, e, "battery lvl %d\n", pp->battery);
n = readstr(offset, a, n, buf);
free(buf);
return n;
}
error(Ebadarg);
return -1; /* not reached */
}
static long
pcmwrite(int dev, int attr, void *a, long n, vlong off)
{
int i, len;
PCMmap *m;
uchar *ac;
PCMslot *pp;
ulong offset = off;
pp = slot + dev;
if(pp->memlen < offset)
return 0;
if(pp->memlen < offset + n)
n = pp->memlen - offset;
m = 0;
if(waserror()){
if(m)
pcmunmap(pp->slotno, m);
nexterror();
}
ac = a;
for(len = n; len > 0; len -= i){
m = pcmmap(pp->slotno, offset, 0, attr);
if(m == 0)
error("cannot map PCMCIA card");
if(offset + len > m->cea)
i = m->cea - offset;
else
i = len;
memmoveb(KADDR(m->isa + offset - m->ca), ac, i);
pcmunmap(pp->slotno, m);
offset += i;
ac += i;
}
poperror();
return n;
}
static long
i82365write(Chan *c, void *a, long n, vlong off)
{
PCMslot *pp;
char buf[32];
switch(TYPE(c)){
case Qctl:
if(n >= sizeof(buf))
n = sizeof(buf) - 1;
strncpy(buf, a, n);
buf[n] = 0;
pp = slot + SLOTNO(c);
if(!pp->occupied)
error(Eio);
/* set vpp on card */
if(strncmp(buf, "vpp", 3) == 0)
wrreg(pp, Rpc, vcode(atoi(buf+3))|Fautopower|Foutena|Fcardena);
return n;
case Qmem:
case Qattr:
pp = slot + SLOTNO(c);
if(pp->occupied == 0 || pp->enabled == 0)
error(Eio);
n = pcmwrite(pp->slotno, TYPE(c) == Qattr, a, n, off);
if(n < 0)
error(Eio);
return n;
}
error(Ebadarg);
return -1; /* not reached */
}
Dev i82365devtab = {
'y',
"i82365",
devreset,
devinit,
devshutdown,
i82365attach,
i82365walk,
i82365stat,
i82365open,
devcreate,
i82365close,
i82365read,
devbread,
i82365write,
devbwrite,
devremove,
devwstat,
};
/*
* configure the PCMslot for IO. We assume very heavily that we can read
* configuration info from the CIS. If not, we won't set up correctly.
*/
static int
pcmio(int slotno, ISAConf *isa)
{
uchar we, x, *p;
PCMslot *pp;
PCMconftab *ct, *et, *t;
PCMmap *m;
int i, index, irq;
char *cp;
irq = isa->irq;
if(irq == 2)
irq = 9;
if(slotno > nslot)
return -1;
pp = slot + slotno;
if(!pp->occupied)
return -1;
et = &pp->ctab[pp->nctab];
ct = 0;
for(i = 0; i < isa->nopt; i++){
if(strncmp(isa->opt[i], "index=", 6))
continue;
index = strtol(&isa->opt[i][6], &cp, 0);
if(cp == &isa->opt[i][6] || index >= pp->nctab)
return -1;
ct = &pp->ctab[index];
}
if(ct == 0){
/* assume default is right */
if(pp->def)
ct = pp->def;
else
ct = pp->ctab;
/* try for best match */
if(ct->nio == 0
|| ct->io[0].start != isa->port || ((1<<irq) & ct->irqs) == 0){
for(t = pp->ctab; t < et; t++)
if(t->nio
&& t->io[0].start == isa->port
&& ((1<<irq) & t->irqs)){
ct = t;
break;
}
}
if(ct->nio == 0 || ((1<<irq) & ct->irqs) == 0){
for(t = pp->ctab; t < et; t++)
if(t->nio && ((1<<irq) & t->irqs)){
ct = t;
break;
}
}
if(ct->nio == 0){
for(t = pp->ctab; t < et; t++)
if(t->nio){
ct = t;
break;
}
}
}
if(ct == et || ct->nio == 0)
return -1;
if(isa->port == 0 && ct->io[0].start == 0)
return -1;
/* route interrupts */
isa->irq = irq;
wrreg(pp, Rigc, irq | Fnotreset | Fiocard);
/* set power and enable device */
x = vcode(ct->vpp1);
wrreg(pp, Rpc, x|Fautopower|Foutena|Fcardena);
/* 16-bit data path */
if(ct->bit16)
x = Ftiming|Fiocs16|Fwidth16;
else
x = Ftiming;
if(ct->nio == 2 && ct->io[1].start)
x |= x<<4;
wrreg(pp, Rio, x);
/*
* enable io port map 0
* the 'top' register value includes the last valid address
*/
if(isa->port == 0)
isa->port = ct->io[0].start;
we = rdreg(pp, Rwe);
wrreg(pp, Riobtm0lo, isa->port);
wrreg(pp, Riobtm0hi, isa->port>>8);
i = isa->port+ct->io[0].len-1;
wrreg(pp, Riotop0lo, i);
wrreg(pp, Riotop0hi, i>>8);
we |= 1<<6;
if(ct->nio >= 2 && ct->io[1].start){
wrreg(pp, Riobtm1lo, ct->io[1].start);
wrreg(pp, Riobtm1hi, ct->io[1].start>>8);
i = ct->io[1].start+ct->io[1].len-1;
wrreg(pp, Riotop1lo, i);
wrreg(pp, Riotop1hi, i>>8);
we |= 1<<7;
}
wrreg(pp, Rwe, we);
/* only touch Rconfig if it is present */
m = pcmmap(slotno, pp->cfg[0].caddr + Rconfig, 0x20, 1);
p = KADDR(m->isa + pp->cfg[0].caddr - m->ca);
if(pp->cfg[0].cpresent & (1<<Rconfig)){
/* Reset adapter */
/* set configuration and interrupt type.
* if level is possible on the card, use it.
*/
x = ct->index;
if(ct->irqtype & 0x20)
x |= Clevel;
/* enable the device, enable address decode and
* irq enable.
*/
x |= Cfunc|Cdecode|Cirq;
p[0] = x;
//delay(5);
microdelay(40);
}
if(pp->cfg[0].cpresent & (1<<Riobase0)){
/* set up the iobase 0 */
p[Riobase0 << 1] = isa->port;
p[Riobase1 << 1] = isa->port >> 8;
}
if(pp->cfg[0].cpresent & (1<<Riosize))
p[Riosize << 1] = ct->io[0].len;
pcmunmap(slotno, m);
return 0;
}