/*
* Set clock rate to hz (or max speed if hz == 0)
*/
void
setclkrate(int clkid, ulong hz)
{
u32int buf[2];
buf[0] = clkid;
if(hz != 0)
buf[1] = hz;
else if(vcreq(TagGetclkmax, buf, sizeof(buf[0]), sizeof(buf)) != sizeof buf)
return;
vcreq(TagSetclkspd, buf, sizeof(buf), sizeof(buf));
}
static int
fbdefault(int *width, int *height, int *depth)
{
u32int buf[3];
if(vcreq(TagGetres, &buf[0], 0, 2*4) != 2*4 ||
vcreq(TagGetdepth, &buf[2], 0, 4) != 4)
return -1;
*width = buf[0];
*height = buf[1];
*depth = buf[2];
return 0;
}
static int
fbdefault(int *width, int *height, int *depth)
{
u32int buf[3];
char *p;
if(vcreq(TagGetres, &buf[0], 0, 2*4) != 2*4 ||
vcreq(TagGetdepth, &buf[2], 0, 4) != 4)
return -1;
*width = buf[0];
*height = buf[1];
if((p = getconf("bcm2708_fb.fbdepth")) != nil)
*depth = atoi(p);
else
*depth = buf[2];
return 0;
}
/*
* Get firmware revision
*/
uint
getfirmware(void)
{
u32int buf[1];
if(vcreq(TagGetfwrev, buf, 0, sizeof buf) != sizeof buf)
return 0;
return buf[0];
}
/*
* Power management
*/
void
setpower(int dev, int on)
{
u32int buf[2];
buf[0] = dev;
buf[1] = Powerwait | (on? 1 : 0);
vcreq(TagSetpower, buf, sizeof buf, sizeof buf);
}
/*
* Get board revision
*/
uint
getboardrev(void)
{
u32int buf[1];
if(vcreq(TagGetrev, buf, 0, sizeof buf) != sizeof buf)
return 0;
return buf[0];
}
/*
* Get clock rate
*/
ulong
getclkrate(int clkid)
{
u32int buf[2];
buf[0] = clkid;
if(vcreq(TagGetclkspd, buf, sizeof(buf[0]), sizeof(buf)) != sizeof buf)
return 0;
return buf[1];
}
/*
* Get ARM ram
*/
void
getramsize(Confmem *mem)
{
u32int buf[2];
if(vcreq(TagGetram, buf, 0, sizeof buf) != sizeof buf)
return;
mem->base = buf[0];
mem->limit = buf[1];
}
int
fbblank(int blank)
{
u32int buf[1];
buf[0] = blank;
if(vcreq(TagFbblank, buf, sizeof buf, sizeof buf) != sizeof buf)
return -1;
return buf[0] & 1;
}
/*
* Get cpu temperature
*/
uint
getcputemp(void)
{
u32int buf[2];
buf[0] = 0;
if(vcreq(TagGettemp, buf, sizeof(buf[0]), sizeof buf) != sizeof buf)
return 0;
return buf[1];
}
int
getpower(int dev)
{
u32int buf[2];
buf[0] = dev;
buf[1] = 0;
if(vcreq(TagGetpower, buf, sizeof buf[0], sizeof buf) != sizeof buf)
return -1;
return buf[0] & 1;
}
/*
* Virtual GPIO - used for ACT LED on pi3
*/
void
vgpinit(void)
{
u32int buf[1];
uintptr va;
buf[0] = 0;
if(vcreq(TagGetGpio, buf, 0, sizeof(buf)) != sizeof buf || buf[0] == 0)
return;
va = mmukmap(VGPIO, buf[0] & ~0xC0000000, BY2PG);
if(va == 0)
return;
vgpio.counts = (u32int*)va;
}
/*
* Get ethernet address (as hex string)
* [not reentrant]
*/
char *
getethermac(void)
{
uchar ea[8];
char *p;
int i;
static char buf[16];
memset(ea, 0, sizeof ea);
vcreq(TagGetmac, ea, 0, sizeof ea);
p = buf;
for(i = 0; i < 6; i++)
p += sprint(p, "%.2x", ea[i]);
return buf;
}
