static int
cs4281_rdcd(kobj_t obj, void *devinfo, int regno)
{
struct sc_info *sc = (struct sc_info *)devinfo;
int codecno;
codecno = regno >> 8;
regno &= 0xff;
/* Remove old state */
cs4281_rd(sc, CS4281PCI_ACSDA);
/* Fill in AC97 register value request form */
cs4281_wr(sc, CS4281PCI_ACCAD, regno);
cs4281_wr(sc, CS4281PCI_ACCDA, 0);
cs4281_wr(sc, CS4281PCI_ACCTL, CS4281PCI_ACCTL_ESYN |
CS4281PCI_ACCTL_VFRM | CS4281PCI_ACCTL_DCV |
CS4281PCI_ACCTL_CRW);
/* Wait for read to complete */
if (cs4281_waitclr(sc, CS4281PCI_ACCTL, CS4281PCI_ACCTL_DCV, 250) == 0) {
device_printf(sc->dev, "cs4281_rdcd: DCV did not go\n");
return -1;
}
/* Wait for valid status */
if (cs4281_waitset(sc, CS4281PCI_ACSTS, CS4281PCI_ACSTS_VSTS, 250) == 0) {
device_printf(sc->dev,"cs4281_rdcd: VSTS did not come\n");
return -1;
}
return cs4281_rd(sc, CS4281PCI_ACSDA);
}
static void
cs4281_wrcd(kobj_t obj, void *devinfo, int regno, u_int32_t data)
{
struct sc_info *sc = (struct sc_info *)devinfo;
regno &= 0xff;
cs4281_wr(sc, CS4281PCI_ACCAD, regno);
cs4281_wr(sc, CS4281PCI_ACCDA, data);
cs4281_wr(sc, CS4281PCI_ACCTL, CS4281PCI_ACCTL_ESYN |
CS4281PCI_ACCTL_VFRM | CS4281PCI_ACCTL_DCV);
if (cs4281_waitclr(sc, CS4281PCI_ACCTL, CS4281PCI_ACCTL_DCV, 250) == 0) {
device_printf(sc->dev,"cs4281_wrcd: DCV did not go\n");
}
}
