static void
intsmb_alrintr(struct intsmb_softc *sc)
{
int slvcnt;
#ifdef ENABLE_ALART
int error;
uint8_t addr;
#endif
/* Stop generating INTR from ALART. */
slvcnt = bus_read_1(sc->io_res, PIIX4_SMBSLVCNT);
#ifdef ENABLE_ALART
bus_write_1(sc->io_res, PIIX4_SMBSLVCNT,
slvcnt & ~PIIX4_SMBSLVCNT_ALTEN);
#endif
DELAY(5);
/* Ask bus who asserted it and then ask it what's the matter. */
#ifdef ENABLE_ALART
error = intsmb_free(sc);
if (error)
return;
bus_write_1(sc->io_res, PIIX4_SMBHSTADD, SMBALTRESP | LSB);
intsmb_start(sc, PIIX4_SMBHSTCNT_PROT_BYTE, 1);
error = intsmb_stop_poll(sc);
if (error)
device_printf(sc->dev, "ALART: ERROR\n");
else {
addr = bus_read_1(sc->io_res, PIIX4_SMBHSTDAT0);
device_printf(sc->dev, "ALART_RESPONSE: 0x%x\n", addr);
}
/* Re-enable INTR from ALART. */
bus_write_1(sc->io_res, PIIX4_SMBSLVCNT,
slvcnt | PIIX4_SMBSLVCNT_ALTEN);
DELAY(5);
#endif
}
static int
intsmb_readw(device_t dev, u_char slave, char cmd, short *word)
{
struct intsmb_softc *sc = device_get_softc(dev);
int error;
INTSMB_LOCK(sc);
error = intsmb_free(sc);
if (error) {
INTSMB_UNLOCK(sc);
return (error);
}
bus_write_1(sc->io_res, PIIX4_SMBHSTADD, slave | LSB);
bus_write_1(sc->io_res, PIIX4_SMBHSTCMD, cmd);
intsmb_start(sc, PIIX4_SMBHSTCNT_PROT_WDATA, 0);
error = intsmb_stop(sc);
if (error == 0) {
*word = bus_read_1(sc->io_res, PIIX4_SMBHSTDAT0);
*word |= bus_read_1(sc->io_res, PIIX4_SMBHSTDAT1) << 8;
}
INTSMB_UNLOCK(sc);
return (error);
}
