static int
intsmb_sendb(device_t dev, u_char slave, char byte)
{
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, byte);
intsmb_start(sc, PIIX4_SMBHSTCNT_PROT_BYTE, 0);
error = intsmb_stop(sc);
INTSMB_UNLOCK(sc);
return (error);
}
static int
intsmb_readb(device_t dev, u_char slave, char cmd, char *byte)
{
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_BDATA, 0);
error = intsmb_stop(sc);
if (error == 0)
*byte = bus_read_1(sc->io_res, PIIX4_SMBHSTDAT0);
INTSMB_UNLOCK(sc);
return (error);
}
static int
intsmb_writew(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);
bus_write_1(sc->io_res, PIIX4_SMBHSTDAT0, word & 0xff);
bus_write_1(sc->io_res, PIIX4_SMBHSTDAT1, (word >> 8) & 0xff);
intsmb_start(sc, PIIX4_SMBHSTCNT_PROT_WDATA, 0);
error = intsmb_stop(sc);
INTSMB_UNLOCK(sc);
return (error);
}
static int
intsmb_bread(device_t dev, u_char slave, char cmd, u_char *count, char *buf)
{
struct intsmb_softc *sc = device_get_softc(dev);
int error, i;
u_char data, nread;
if (*count > SMBBLOCKTRANS_MAX || *count == 0)
return (SMB_EINVAL);
INTSMB_LOCK(sc);
error = intsmb_free(sc);
if (error) {
INTSMB_UNLOCK(sc);
return (error);
}
/* Reset internal array index. */
bus_read_1(sc->io_res, PIIX4_SMBHSTCNT);
bus_write_1(sc->io_res, PIIX4_SMBHSTADD, slave | LSB);
bus_write_1(sc->io_res, PIIX4_SMBHSTCMD, cmd);
bus_write_1(sc->io_res, PIIX4_SMBHSTDAT0, *count);
intsmb_start(sc, PIIX4_SMBHSTCNT_PROT_BLOCK, 0);
error = intsmb_stop(sc);
if (error == 0) {
nread = bus_read_1(sc->io_res, PIIX4_SMBHSTDAT0);
if (nread != 0 && nread <= SMBBLOCKTRANS_MAX) {
for (i = 0; i < nread; i++) {
data = bus_read_1(sc->io_res, PIIX4_SMBBLKDAT);
if (i < *count)
buf[i] = data;
}
*count = nread;
} else
error = SMB_EBUSERR;
}
INTSMB_UNLOCK(sc);
return (error);
}
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);
}
