ref: 9fd3e3f239162a192e0136034187ed674106e58b
dir: /sys/src/9/zynq/devarch.c/
#include "u.h"
#include "../port/lib.h"
#include "mem.h"
#include "dat.h"
#include "fns.h"
#include "io.h"
#include "ureg.h"
#include "../port/error.h"
enum {
Qdir = 0,
Qtemp,
Qpl,
Qbase,
Qmax = 16,
};
static Dirtab archdir[Qmax] = {
".", { Qdir, 0, QTDIR }, 0, 0555,
"temp", { Qtemp, 0}, 0, 0440,
"pl", { Qpl, 0 }, 0, 0660,
};
static int narchdir = Qbase;
int temp = -128;
ulong *devc;
int dmadone;
QLock pllock;
enum { PLBUFSIZ = 8192 };
uchar *plbuf;
Rendez plinitr, pldoner, pldmar;
enum {
DEVCTRL = 0,
DEVISTS = 0xc/4,
DEVMASK,
DEVSTS,
DMASRC = 0x18/4,
DMADST,
DMASRCL,
DMADSTL,
XADCCFG = 0x100/4,
XADCSTS,
XADCMASK,
XADCMSTS,
XADCCMD,
XADCREAD,
XADCMCTL,
FPGA0_CLK_CTRL = 0x170/4,
};
enum {
PROG = 1<<30,
DONE = 1<<2,
INITPE = 1<<1,
INIT = 1<<4,
DMADONE = 1<<13,
};
static void
scram(void)
{
splhi();
slcr[0x100/4] |= 1<<4;
slcr[0x104/4] |= 1<<4;
slcr[0x108/4] |= 1<<4;
slcr[DEVCTRL] &= ~PROG;
slcr[0x244/4] = 1<<4|1<<5;
}
static void
xadcirq(Ureg *, void *)
{
int v;
static int al, notfirst;
while((devc[XADCMSTS] & 1<<8) == 0){
v = ((u16int)devc[XADCREAD]) >> 4;
if(v == 0){
if(notfirst)
print("temperature sensor reads 0, shouldn't happen\n");
break;
}
notfirst = 1;
temp = v * 5040 / 4096 - 2732;
if(temp >= 800){
if(al == 0)
print("temperature exceeds 80 deg C\n");
al = 1;
}
if(temp <= 750)
al = 0;
if(temp >= 900){
print("chip temperature exceeds 90 deg C, shutting down");
scram();
}
}
devc[XADCSTS] = -1;
}
static void
xadctimer(void)
{
devc[XADCCMD] = 1<<26 | 0<<16;
}
static void
xadcinit(void)
{
int i;
int x;
devc = vmap(DEVC_BASE, 0x11C);
devc[XADCMCTL] |= 1<<4;
devc[XADCMCTL] &= ~(1<<4);
devc[XADCCMD] = 0x08030000;
for(i = 0; i < 15; i++)
devc[XADCCMD] = 0;
while((devc[XADCMSTS] & 1<<10) == 0)
;
while((devc[XADCMSTS] & 1<<8) == 0){
x = devc[XADCREAD];
USED(x);
}
devc[XADCCFG] = 0x80001114;
devc[XADCMASK] = ~(1<<8);
devc[XADCSTS] = -1;
intrenable(XADCIRQ, xadcirq, nil, LEVEL, "xadc");
addclock0link(xadctimer, XADCINTERVAL);
}
static int
isplinit(void *)
{
return devc[DEVSTS] & INIT;
}
static int
ispldone(void *)
{
return devc[DEVISTS] & DONE;
}
static int
isdmadone(void *)
{
return dmadone;
}
static void
plirq(Ureg *, void *)
{
ulong fl;
fl = devc[DEVISTS];
if((fl & INITPE) != 0)
wakeup(&plinitr);
if((fl & DONE) != 0){
slcr[0x900/4] = 0xf;
slcr[0x240/4] = 0;
print("DONE!\n");
devc[DEVMASK] |= DONE;
wakeup(&pldoner);
}
if((fl & DMADONE) != 0){
dmadone++;
wakeup(&pldmar);
}
devc[DEVISTS] = fl;
}
static void
plinit(void)
{
Physseg seg;
devc[DEVCTRL] &= ~(PROG|1<<25);
devc[DEVCTRL] |= 3<<26|PROG;
devc[DEVISTS] = -1;
devc[DEVMASK] = ~(DONE|INITPE|DMADONE);
intrenable(DEVCIRQ, plirq, nil, LEVEL, "pl");
slcr[FPGA0_CLK_CTRL] = 1<<20 | 10<<8;
memset(&seg, 0, sizeof seg);
seg.attr = SG_PHYSICAL;
seg.name = "axi";
seg.pa = 0x40000000;
seg.size = 0x8000000;
addphysseg(&seg);
}
static void
plconf(void)
{
if(!canqlock(&pllock))
error(Einuse);
slcr[0x240/4] = 0xf;
slcr[0x900/4] = 0xa;
dmadone = 1;
devc[DEVISTS] = DONE|INITPE|DMADONE;
devc[DEVCTRL] |= PROG;
devc[DEVCTRL] &= ~PROG;
devc[DEVMASK] &= ~DONE;
devc[DEVCTRL] |= PROG;
sleep(&plinitr, isplinit, nil);
plbuf = smalloc(PLBUFSIZ);
}
static long
plwrite(uintptr pa, long n)
{
long w;
w = n >> 2;
sleep(&pldmar, isdmadone, nil);
dmadone = 0;
coherence();
devc[DMASRC] = pa;
devc[DMADST] = -1;
devc[DMASRCL] = w;
devc[DMADSTL] = 0;
return n;
}
static long
plcopy(uchar *d, long n)
{
long ret;
ulong nn;
uintptr pa;
if((n & 3) != 0 || n <= 0)
error(Eshort);
ret = n;
pa = PADDR(plbuf);
while(n > 0){
if(n > PLBUFSIZ)
nn = PLBUFSIZ;
else
nn = n;
memmove(plbuf, d, nn);
cleandse(plbuf, plbuf + nn);
clean2pa(pa, pa + nn);
n -= plwrite(pa, nn);
}
return ret;
}
static long
userdma(void *a, long n, long (*f)(uintptr, long))
{
ulong s;
void *va;
uintptr pa;
long off, nn, ret;
evenaddr((uintptr) a);
if((n & 3) != 0)
error(Eshort);
ret = n;
while(n > 0){
off = (uintptr)a & BY2PG - 1;
va = (void *) ((uintptr)a & ~(BY2PG - 1));
s = splhi();
while(pa = palookur(va), (pa & 1) != 0){
splx(s);
if(fault(pa, 1) < 0)
error(Egreg);
s = splhi();
}
if(off + n >= BY2PG)
nn = BY2PG - off;
else
nn = n;
pa = (pa & ~(BY2PG - 1)) + off;
cleandse((char *) a + off, (char*) a + off + nn);
clean2pa(pa, pa + nn);
n -= f(pa, nn);
splx(s);
a = (char *) va + BY2PG;
}
return ret;
}
void
archinit(void)
{
slcr[2] = 0xDF0D;
xadcinit();
plinit();
}
static long
archread(Chan *c, void *a, long n, vlong offset)
{
char buf[64];
switch((ulong)c->qid.path){
case Qdir:
return devdirread(c, a, n, archdir, narchdir, devgen);
case Qtemp:
snprint(buf, sizeof(buf), "%d.%d\n", temp/10, temp%10);
return readstr(offset, a, n, buf);
case Qpl:
sleep(&pldoner, ispldone, nil);
return 0;
default:
error(Egreg);
return -1;
}
}
static long
archwrite(Chan *c, void *a, long n, vlong offset)
{
switch((ulong)c->qid.path){
case Qpl:
return plcopy(a, n);
default:
error(Egreg);
return -1;
}
}
Walkqid*
archwalk(Chan* c, Chan *nc, char** name, int nname)
{
return devwalk(c, nc, name, nname, archdir, narchdir, devgen);
}
static int
archstat(Chan* c, uchar* dp, int n)
{
return devstat(c, dp, n, archdir, narchdir, devgen);
}
static Chan*
archopen(Chan* c, int omode)
{
devopen(c, omode, archdir, narchdir, devgen);
if((ulong)c->qid.path == Qpl && c->mode == OWRITE)
plconf();
return c;
}
static void
archclose(Chan* c)
{
if((ulong)c->qid.path == Qpl && c->mode == OWRITE){
/* cleandse(plbuf, plbuf + plbufn);
clean2pa(PADDR(plbuf), PADDR(plbuf) + plbufn);
plwrite(PADDR(plbuf), 4096);
plwrite(PADDR(plbuf) + 4096, plbufn - 4096);
plbufn = 0;*/
free(plbuf);
plbuf = nil;
qunlock(&pllock);
}
}
static Chan*
archattach(char* spec)
{
return devattach('P', spec);
}
Dev archdevtab = {
'P',
"arch",
devreset,
devinit,
devshutdown,
archattach,
archwalk,
archstat,
archopen,
devcreate,
archclose,
archread,
devbread,
archwrite,
devbwrite,
devremove,
devwstat,
};