int
pcisetpms(Pcidev* p, int state)
{
int pmc, pmcsr, ptr;
if((ptr = pcicap(p, PciCapPMG)) == -1)
return -1;
pmc = pcicfgr16(p, ptr+Pmgcap);
pmcsr = pcicfgr16(p, ptr+Pmgctl);
switch(state){
default:
return -1;
case 0:
break;
case 1:
if(!(pmc & 0x0200))
return -1;
break;
case 2:
if(!(pmc & 0x0400))
return -1;
break;
case 3:
break;
}
pcicfgw16(p, ptr+4, (pmcsr & ~3) | state);
return pmcsr & 3;
}
int
pcigetpms(Pcidev* p)
{
int ptr;
if((ptr = pcicap(p, PciCapPMG)) == -1)
return -1;
return pcicfgr16(p, ptr+Pmgctl) & 0x0003;
}
static char*
powermode(Ctlr *ctlr)
{
uchar c[Tcmdsize];
int capoff, reg;
memset(c, 0, sizeof(c));
capoff = pcicap(ctlr->pdev, PciCapPCIe);
if(capoff >= 0){
reg = pcicfgr8(ctlr->pdev, capoff+1);
if((reg & 1) == 0) /* PCI_PCIE_LCR_ASPM_L0S */
c[0] |= 1<<3; /* WPI_PS_PCI_PMGT */
}
return cmd(ctlr, 119, c, 4*(3+5));
}
