ref: cbe4b116989c0bfec49b9ae7a1d9a85ead6648ae
dir: /sys/src/cmd/aux/acpi.c/
#include <u.h>
#include <libc.h>
#include <fcall.h>
#include <thread.h>
#include <9p.h>
#include <aml.h>
typedef struct Batstat Batstat;
typedef struct Bat Bat;
typedef struct Tbl Tbl;
typedef struct Therm Therm;
struct Batstat {
int rate;
int capacity;
int state;
int voltage;
};
struct Bat {
char *unit;
void *bst;
int fullcharge;
int capacity;
int capacitywarn;
int capacitylow;
int voltage;
};
struct Tbl {
uchar sig[4];
uchar len[4];
uchar rev;
uchar csum;
uchar oemid[6];
uchar oemtid[8];
uchar oemrev[4];
uchar cid[4];
uchar crev[4];
uchar data[];
};
struct Therm {
uint cpus;
void *tmp;
};
enum {
Tblsz = 4+4+1+1+6+8+4+4+4,
Temp = 1,
Battery,
Pmctl,
SLP_EN = 0x2000,
SLP_TM = 0x1c00,
};
static ulong PM1a_CNT_BLK, PM1b_CNT_BLK, SLP_TYPa, SLP_TYPb;
static ulong GPE0_BLK, GPE1_BLK, GPE0_BLK_LEN, GPE1_BLK_LEN;
static int ec, mem, iofd[5], nbats, ntherms, facp;
static char *uid = "pm", *units[] = {"mW", "mA"};
static Therm therms[16];
static Bat bats[4];
static char*
eisaid(void *v)
{
static char id[8];
ulong b, l;
int i;
if(amltag(v) == 's')
return v;
b = amlint(v);
for(l = 0, i = 24; i >= 0; i -= 8, b >>= 8)
l |= (b & 0xFF) << i;
id[7] = 0;
for(i = 6; i >= 3; i--, l >>= 4)
id[i] = "0123456789ABCDEF"[l & 0xF];
for(i = 2; i >= 0; i--, l >>= 5)
id[i] = '@' + (l & 0x1F);
return id;
}
static int
enumec(void *dot, void *)
{
void *p;
char *id;
id = eisaid(amlval(amlwalk(dot, "^_HID")));
if(id == nil || strcmp(id, "PNP0C09") != 0)
return 1;
p = amlwalk(dot, "^_REG");
if(p != nil)
amleval(p, "ii", 0x3, 1, nil);
return 1;
}
static int
enumbat(void *dot, void *)
{
void *p, *r, **rr;
Bat *b;
int n;
if(nbats >= nelem(bats))
return 1;
if((p = amlwalk(dot, "^_STA")) == nil)
return 1;
if(amleval(p, "", &r) < 0 || (amlint(r)&3) != 3)
return 1;
if(amleval(dot, "", &r) < 0) /* _BIF */
return 1;
if(r == nil || amltag(r) != 'p' || amllen(r) < 7)
return 1;
rr = amlval(r);
b = &bats[nbats];
if((n = amlint(rr[0])) >= nelem(units) || n < 0)
b->unit = "??";
else
b->unit = units[n];
b->capacity = amlint(rr[1]);
if(b->capacity < 0) /* even though _STA tells it's there */
return 1;
b->fullcharge = amlint(rr[2]);
b->voltage = amlint(rr[4]);
b->capacitywarn = amlint(rr[5]);
b->capacitylow = amlint(rr[6]);
b->bst = amlwalk(dot, "^_BST");
if(b->bst != nil){
amltake(b->bst);
nbats++;
}
return 1;
}
static int
enumtmp(void *dot, void *)
{
void *r, **rr;
char s[64];
uint cpus;
int i, n;
cpus = 0;
if(ntherms < nelem(therms) && amleval(dot, "", &r) >= 0 && amllen(r) > 0 && (rr = amlval(r)) != nil){
for(i = 0; i < amllen(r); i++){
snprint(s, sizeof(s), "%N", amlval(rr[i]));
for(n = strlen(s)-1; n > 3; n--){
if(s[n-2] == 'C' && s[n-1] == 'P' && s[n] == 'U' && s[n+1] >= '0' && s[n+1] <= '9'){
cpus |= 1 << atoi(&s[n+1]);
break;
}
}
}
}
if(cpus != 0 && (dot = amlwalk(dot, "^_TMP")) != nil){
therms[ntherms].cpus = cpus;
therms[ntherms].tmp = dot;
ntherms++;
}
return 1;
}
static int
batstat(Bat *b, Batstat *s)
{
void *r, **rr;
if(amleval(b->bst, "", &r) < 0)
return -1;
if(r == nil || amltag(r) != 'p' || amllen(r) < 4)
return -1;
rr = amlval(r);
s->state = amlint(rr[0]);
s->rate = amlint(rr[1]);
s->capacity = amlint(rr[2]);
s->voltage = amlint(rr[3]);
return 0;
}
static void
batteryread(char *s, char *e)
{
int n, x, hh, mm, ss;
char *state;
Batstat st;
Bat *b;
for(n = 0; n < nbats; n++){
b = &bats[n];
state = "unknown";
ss = x = 0;
if(batstat(b, &st) == 0){
if(st.state & 4)
state = "critical";
else if(st.state & 1)
state = "discharging";
else if(st.state & 2)
state = "charging";
if(st.rate > 0 && (st.state & 2) == 0)
ss = st.capacity * 3600 / st.rate;
if(bats[n].fullcharge > 0){
x = st.capacity * 100 / bats[n].fullcharge;
if(st.rate > 0 && (st.state & 2) != 0)
ss = (bats[n].fullcharge - st.capacity) * 3600 / st.rate;
}
}else{
memset(&st, 0, sizeof(st));
}
hh = ss / 3600;
ss -= 3600 * (ss / 3600);
mm = ss / 60;
ss -= 60 * (ss / 60);
s = seprint(s, e, "%d %s %d %d %d %d %d %s %d %d %02d:%02d:%02d %s\n",
x,
bats[n].unit, st.capacity, b->fullcharge, b->capacity, b->capacitywarn, b->capacitylow,
"mV", st.voltage, b->voltage,
hh, mm, ss,
state
);
}
}
static void
tmpread(char *s, char *e)
{
void *er;
int n, t;
for(n = 0; n < ntherms; n++){
t = 2732;
if(amleval(therms[n].tmp, "", &er) >= 0)
t = amlint(er);
s = seprint(s, e, "%d.0\n", (t - 2732)/10);
}
}
static void
wirecpu0(void)
{
char buf[32];
int ctl;
snprint(buf, sizeof(buf), "/proc/%d/ctl", getpid());
if((ctl = open(buf, OWRITE)) < 0)
return;
write(ctl, "wired 0", 7);
close(ctl);
}
static void
outw(long addr, ushort val)
{
uchar buf[2];
if(addr == 0)
return;
buf[0] = val;
buf[1] = val >> 8;
pwrite(iofd[2], buf, 2, addr);
}
static void
poweroff(void)
{
int n;
if(facp == 0){
werrstr("no FACP");
return;
}
wirecpu0();
/* disable GPEs */
for(n = 0; GPE0_BLK > 0 && n < GPE0_BLK_LEN/2; n += 2){
outw(GPE0_BLK + GPE0_BLK_LEN/2 + n, 0); /* EN */
outw(GPE0_BLK + n, 0xffff); /* STS */
}
for(n = 0; GPE1_BLK > 0 && n < GPE1_BLK_LEN/2; n += 2){
outw(GPE1_BLK + GPE1_BLK_LEN/2 + n, 0); /* EN */
outw(GPE1_BLK + n, 0xffff); /* STS */
}
outw(PM1a_CNT_BLK, ((SLP_TYPa << 10) & SLP_TM) | SLP_EN);
outw(PM1b_CNT_BLK, ((SLP_TYPb << 10) & SLP_TM) | SLP_EN);
sleep(100);
/*
* The SetSystemSleeping() example from the ACPI spec
* writes the same value in both registers. But Linux/BSD
* write distinct values from the _Sx package (like the
* code above). The _S5 package on a HP DC5700 is
* Package(0x2){0x0, 0x7} and writing SLP_TYPa of 0 to
* PM1a_CNT_BLK seems to have no effect but 0x7 seems
* to work fine. So trying the following as a last effort.
*/
SLP_TYPa |= SLP_TYPb;
outw(PM1a_CNT_BLK, ((SLP_TYPa << 10) & SLP_TM) | SLP_EN);
outw(PM1b_CNT_BLK, ((SLP_TYPa << 10) & SLP_TM) | SLP_EN);
sleep(100);
werrstr("acpi failed");
}
static void
pmctlread(char *s, char *e)
{
USED(s, e);
}
static void
fsread(Req *r)
{
char msg[512], *s, *e;
void *aux;
s = msg;
e = s + sizeof(msg);
*s = 0;
aux = r->fid->file->aux;
if(r->ifcall.offset == 0){
if(aux == (void*)Temp)
tmpread(s, e);
else if(aux == (void*)Battery)
batteryread(s, e);
else if(aux == (void*)Pmctl)
pmctlread(s, e);
}
readstr(r, msg);
respond(r, nil);
}
static void
fswrite(Req *r)
{
char msg[256], *f[4];
void *aux;
int nf;
snprint(msg, sizeof(msg), "%.*s",
utfnlen((char*)r->ifcall.data, r->ifcall.count), (char*)r->ifcall.data);
nf = tokenize(msg, f, nelem(f));
aux = r->fid->file->aux;
if(aux == (void*)Pmctl){
if(nf == 2 && strcmp(f[0], "power") == 0 && strcmp(f[1], "off") == 0)
poweroff(); /* should not go any further here */
else
werrstr("invalid ctl message");
responderror(r);
return;
}
r->ofcall.count = r->ifcall.count;
respond(r, nil);
}
static void
usage(void)
{
fprint(2, "usage: aux/acpi [-Dp] [-m mountpoint] [-s service]\n");
exits("usage");
}
static Srv fs = {
.read = fsread,
.write = fswrite,
};
static ulong
get32(uchar *p)
{
return p[3]<<24 | p[2]<<16 | p[1]<<8 | p[0];
}
void
threadmain(int argc, char **argv)
{
char *mtpt, *srv;
void *r, **rr;
int fd, n, l;
Tbl *t;
mtpt = "/dev";
srv = nil;
ARGBEGIN{
case 'D':
chatty9p = 1;
break;
case 'm':
mtpt = EARGF(usage());
break;
case 's':
srv = EARGF(usage());
break;
case 'p':
amldebug++;
break;
default:
usage();
}ARGEND
if((ec = open("/dev/ec", ORDWR)) < 0)
if((ec = open("#P/ec", ORDWR)) < 0)
goto fail;
if((mem = open("/dev/acpimem", ORDWR)) < 0)
mem = open("#P/acpimem", ORDWR);
if((iofd[1] = open("/dev/iob", ORDWR)) < 0)
if((iofd[1] = open("#P/iob", ORDWR)) < 0)
goto fail;
if((iofd[2] = open("/dev/iow", ORDWR)) < 0)
if((iofd[2] = open("#P/iow", ORDWR)) < 0)
goto fail;
if((iofd[4] = open("/dev/iol", ORDWR)) < 0)
if((iofd[4] = open("#P/iol", ORDWR)) < 0)
goto fail;
if((fd = open("/dev/acpitbls", OREAD)) < 0)
if((fd = open("#P/acpitbls", OREAD)) < 0)
goto fail;
amlinit();
for(;;){
t = malloc(sizeof(*t));
if((n = readn(fd, t, Tblsz)) <= 0)
break;
if(n != Tblsz)
goto fail;
l = get32(t->len);
if(l < Tblsz)
goto fail;
l -= Tblsz;
t = realloc(t, sizeof(*t) + l);
if(readn(fd, t->data, l) != l)
goto fail;
if(memcmp("DSDT", t->sig, 4) == 0){
amlintmask = (~0ULL) >> (t->rev <= 1)*32;
amlload(t->data, l);
}else if(memcmp("SSDT", t->sig, 4) == 0){
amlload(t->data, l);
}else if(memcmp("FACP", t->sig, 4) == 0){
facp = 1;
PM1a_CNT_BLK = get32(((uchar*)t) + 64);
PM1b_CNT_BLK = get32(((uchar*)t) + 68);
GPE0_BLK = get32(((uchar*)t) + 80);
GPE1_BLK = get32(((uchar*)t) + 84);
GPE0_BLK_LEN = *(((uchar*)t) + 92);
GPE1_BLK_LEN = *(((uchar*)t) + 93);
}
}
if(amleval(amlwalk(amlroot, "_S5"), "", &r) >= 0 && amltag(r) == 'p' && amllen(r) >= 2){
rr = amlval(r);
SLP_TYPa = amlint(rr[0]);
SLP_TYPb = amlint(rr[1]);
}
close(fd);
amlenum(amlroot, "_HID", enumec, nil);
amlenum(amlroot, "_BIF", enumbat, nil);
amlenum(amlroot, "_PSL", enumtmp, nil);
fs.tree = alloctree(uid, uid, DMDIR|0555, nil);
if(nbats > 0)
createfile(fs.tree->root, "battery", uid, 0444, (void*)Battery);
if(ntherms > 0)
createfile(fs.tree->root, "cputemp", uid, 0444, (void*)Temp);
createfile(fs.tree->root, "pmctl", uid, 0666, (void*)Pmctl);
threadpostmountsrv(&fs, srv, mtpt, MAFTER);
threadexits(nil);
fail:
sysfatal("%r");
}
static int
readec(Amlio *, void *data, int len, int off)
{
return pread(ec, data, len, off);
}
static int
writeec(Amlio *, void *data, int len, int off)
{
return pwrite(ec, data, len, off);
}
static int
readio(Amlio *io, void *data, int len, int port)
{
assert(len == 1 || len == 2 || len == 4);
return pread(iofd[len], data, len, io->off+port);
}
static int
writeio(Amlio *io, void *data, int len, int port)
{
assert(len == 1 || len == 2 || len == 4);
return pwrite(iofd[len], data, len, io->off+port);
}
static int
memread(Amlio *io, void *data, int len, int addr)
{
return pread(mem, data, len, io->off+addr);
}
static int
memwrite(Amlio *io, void *data, int len, int addr)
{
return pwrite(mem, data, len, io->off+addr);
}
static int
dummy(Amlio *, void *, int len, int)
{
return len;
}
int
amlmapio(Amlio *io)
{
switch(io->space){
case EbctlSpace:
io->read = readec;
io->write = writeec;
break;
case IoSpace:
io->read = readio;
io->write = writeio;
break;
case MemSpace:
io->read = mem >= 0 ? memread : dummy;
io->write = mem >= 0 ? memwrite : dummy;
break;
default:
io->read = dummy;
io->write = dummy;
break;
}
return 0;
}
void
amlunmapio(Amlio *)
{
}