static int
amdpm_sendb(device_t dev, u_char slave, char byte)
{
struct amdpm_softc *sc = (struct amdpm_softc *)device_get_softc(dev);
int error;
u_short l;
AMDPM_LOCK(sc);
amdpm_clear(sc);
if (!amdpm_idle(sc)) {
AMDPM_UNLOCK(sc);
return (SMB_EBUSY);
}
AMDPM_SMBOUTW(sc, AMDSMB_HSTADDR, slave & ~LSB);
AMDPM_SMBOUTW(sc, AMDSMB_HSTDATA, byte);
l = AMDPM_SMBINW(sc, AMDSMB_GLOBAL_ENABLE);
AMDPM_SMBOUTW(sc, AMDSMB_GLOBAL_ENABLE, (l & 0xfff8) | AMDSMB_GE_CYC_BYTE | AMDSMB_GE_HOST_STC);
error = amdpm_wait(sc);
AMDPM_DEBUG(kprintf("amdpm: SENDB to 0x%x, byte=0x%x, error=0x%x\n", slave, byte, error));
AMDPM_UNLOCK(sc);
return (error);
}
static int
amdpm_readw(device_t dev, u_char slave, char cmd, short *word)
{
struct amdpm_softc *sc = (struct amdpm_softc *)device_get_softc(dev);
int error;
u_short l;
AMDPM_LOCK(sc);
amdpm_clear(sc);
if (!amdpm_idle(sc)) {
AMDPM_UNLOCK(sc);
return (SMB_EBUSY);
}
AMDPM_SMBOUTW(sc, AMDSMB_HSTADDR, slave | LSB);
AMDPM_SMBOUTB(sc, AMDSMB_HSTCMD, cmd);
l = AMDPM_SMBINW(sc, AMDSMB_GLOBAL_ENABLE);
AMDPM_SMBOUTW(sc, AMDSMB_GLOBAL_ENABLE, (l & 0xfff8) | AMDSMB_GE_CYC_WDATA | AMDSMB_GE_HOST_STC);
if ((error = amdpm_wait(sc)) == SMB_ENOERR)
*word = AMDPM_SMBINW(sc, AMDSMB_HSTDATA);
AMDPM_DEBUG(printf("amdpm: READW from 0x%x, cmd=0x%x, word=0x%x, error=0x%x\n", slave, cmd, *word, error));
AMDPM_UNLOCK(sc);
return (error);
}
static int
amdpm_bread(device_t dev, u_char slave, char cmd, u_char *count, char *buf)
{
struct amdpm_softc *sc = (struct amdpm_softc *)device_get_softc(dev);
u_char data, len, i;
int error;
u_short l;
if (*count < 1 || *count > 32)
return (SMB_EINVAL);
AMDPM_LOCK(sc);
amdpm_clear(sc);
if (!amdpm_idle(sc)) {
AMDPM_UNLOCK(sc);
return (SMB_EBUSY);
}
AMDPM_SMBOUTW(sc, AMDSMB_HSTADDR, slave | LSB);
AMDPM_SMBOUTB(sc, AMDSMB_HSTCMD, cmd);
l = AMDPM_SMBINW(sc, AMDSMB_GLOBAL_ENABLE);
AMDPM_SMBOUTW(sc, AMDSMB_GLOBAL_ENABLE,
(l & 0xfff8) | AMDSMB_GE_CYC_BLOCK | AMDSMB_GE_HOST_STC);
if ((error = amdpm_wait(sc)) != SMB_ENOERR)
goto error;
len = AMDPM_SMBINW(sc, AMDSMB_HSTDATA);
/* Read the 32-byte internal buffer */
for (i = 0; i < len; i++) {
data = AMDPM_SMBINB(sc, AMDSMB_HSTDFIFO);
if (i < *count)
buf[i] = data;
DELAY(2);
}
*count = len;
error:
AMDPM_DEBUG(printf("amdpm: READBLK to 0x%x, count=0x%x, cmd=0x%x, error=0x%x", slave, *count, cmd, error));
AMDPM_UNLOCK(sc);
return (error);
}
static int
amdpm_bwrite(device_t dev, u_char slave, char cmd, u_char count, char *buf)
{
struct amdpm_softc *sc = (struct amdpm_softc *)device_get_softc(dev);
u_char i;
int error;
u_short l;
if (count < 1 || count > 32)
return (SMB_EINVAL);
AMDPM_LOCK(sc);
amdpm_clear(sc);
if (!amdpm_idle(sc)) {
AMDPM_UNLOCK(sc);
return (SMB_EBUSY);
}
AMDPM_SMBOUTW(sc, AMDSMB_HSTADDR, slave & ~LSB);
/*
* Do we have to reset the internal 32-byte buffer?
* Can't see how to do this from the data sheet.
*/
AMDPM_SMBOUTW(sc, AMDSMB_HSTDATA, count);
/* Fill the 32-byte internal buffer */
for (i = 0; i < count; i++) {
AMDPM_SMBOUTB(sc, AMDSMB_HSTDFIFO, buf[i]);
DELAY(2);
}
AMDPM_SMBOUTB(sc, AMDSMB_HSTCMD, cmd);
l = AMDPM_SMBINW(sc, AMDSMB_GLOBAL_ENABLE);
AMDPM_SMBOUTW(sc, AMDSMB_GLOBAL_ENABLE,
(l & 0xfff8) | AMDSMB_GE_CYC_BLOCK | AMDSMB_GE_HOST_STC);
error = amdpm_wait(sc);
AMDPM_DEBUG(printf("amdpm: WRITEBLK to 0x%x, count=0x%x, cmd=0x%x, error=0x%x", slave, count, cmd, error));
AMDPM_UNLOCK(sc);
return (error);
}
/*
* Poll the SMBus controller
*/
static int
amdpm_wait(struct amdpm_softc *sc)
{
int count = 10000;
u_short sts = 0;
int error;
AMDPM_LOCK_ASSERT(sc);
/* Wait for command to complete (SMBus controller is idle) */
while(count--) {
DELAY(10);
sts = AMDPM_SMBINW(sc, AMDSMB_GLOBAL_STATUS);
if (!(sts & AMDSMB_GS_HST_STS))
break;
}
AMDPM_DEBUG(printf("amdpm: STS=0x%x (count=%d)\n", sts, count));
error = SMB_ENOERR;
if (!count)
error |= SMB_ETIMEOUT;
if (sts & AMDSMB_GS_ABRT_STS)
error |= SMB_EABORT;
if (sts & AMDSMB_GS_COL_STS)
error |= SMB_ENOACK;
if (sts & AMDSMB_GS_PRERR_STS)
error |= SMB_EBUSERR;
if (error != SMB_ENOERR)
amdpm_clear(sc);
return (error);
}
static int
amdpm_quick(device_t dev, u_char slave, int how)
{
struct amdpm_softc *sc = (struct amdpm_softc *)device_get_softc(dev);
int error;
u_short l;
AMDPM_LOCK(sc);
amdpm_clear(sc);
if (!amdpm_idle(sc)) {
AMDPM_UNLOCK(sc);
return (EBUSY);
}
switch (how) {
case SMB_QWRITE:
AMDPM_DEBUG(printf("amdpm: QWRITE to 0x%x", slave));
AMDPM_SMBOUTW(sc, AMDSMB_HSTADDR, slave & ~LSB);
break;
case SMB_QREAD:
AMDPM_DEBUG(printf("amdpm: QREAD to 0x%x", slave));
AMDPM_SMBOUTW(sc, AMDSMB_HSTADDR, slave | LSB);
break;
default:
panic("%s: unknown QUICK command (%x)!", __func__, how);
}
l = AMDPM_SMBINW(sc, AMDSMB_GLOBAL_ENABLE);
AMDPM_SMBOUTW(sc, AMDSMB_GLOBAL_ENABLE, (l & 0xfff8) | AMDSMB_GE_CYC_QUICK | AMDSMB_GE_HOST_STC);
error = amdpm_wait(sc);
AMDPM_DEBUG(printf(", error=0x%x\n", error));
AMDPM_UNLOCK(sc);
return (error);
}
