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/*-
* Copyright (c) 2000 Matthew C. Forman
*
* Based (heavily) on alpm.c which is:
*
* Copyright (c) 1998, 1999 Nicolas Souchu
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/*
* Power management function/SMBus function support for the AMD 756 chip.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: release/9.1.0/sys/pci/amdpm.c 179622 2008-06-06 18:29:56Z jhb $");
#include <sys/param.h>
#include <sys/bus.h>
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/module.h>
#include <sys/mutex.h>
#include <sys/systm.h>
#include <machine/bus.h>
#include <machine/resource.h>
#include <sys/rman.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcireg.h>
#include <dev/smbus/smbconf.h>
#include "smbus_if.h"
#define AMDPM_DEBUG(x) if (amdpm_debug) (x)
#ifdef DEBUG
static int amdpm_debug = 1;
#else
static int amdpm_debug = 0;
#endif
#define AMDPM_VENDORID_AMD 0x1022
#define AMDPM_DEVICEID_AMD756PM 0x740b
#define AMDPM_DEVICEID_AMD766PM 0x7413
#define AMDPM_DEVICEID_AMD768PM 0x7443
#define AMDPM_DEVICEID_AMD8111PM 0x746B
/* nVidia nForce chipset */
#define AMDPM_VENDORID_NVIDIA 0x10de
#define AMDPM_DEVICEID_NF_SMB 0x01b4
/* PCI Configuration space registers */
#define AMDPCI_PMBASE 0x58
#define NFPCI_PMBASE 0x14
#define AMDPCI_GEN_CONFIG_PM 0x41
#define AMDPCI_PMIOEN (1<<7)
#define AMDPCI_SCIINT_CONFIG_PM 0x42
#define AMDPCI_SCISEL_IRQ11 11
#define AMDPCI_REVID 0x08
/*
* I/O registers.
* Base address programmed via AMDPCI_PMBASE.
*/
#define AMDSMB_GLOBAL_STATUS (0x00)
#define AMDSMB_GS_TO_STS (1<<5)
#define AMDSMB_GS_HCYC_STS (1<<4)
#define AMDSMB_GS_HST_STS (1<<3)
#define AMDSMB_GS_PRERR_STS (1<<2)
#define AMDSMB_GS_COL_STS (1<<1)
#define AMDSMB_GS_ABRT_STS (1<<0)
#define AMDSMB_GS_CLEAR_STS (AMDSMB_GS_TO_STS|AMDSMB_GS_HCYC_STS|AMDSMB_GS_PRERR_STS|AMDSMB_GS_COL_STS|AMDSMB_GS_ABRT_STS)
#define AMDSMB_GLOBAL_ENABLE (0x02)
#define AMDSMB_GE_ABORT (1<<5)
#define AMDSMB_GE_HCYC_EN (1<<4)
#define AMDSMB_GE_HOST_STC (1<<3)
#define AMDSMB_GE_CYC_QUICK 0
#define AMDSMB_GE_CYC_BYTE 1
#define AMDSMB_GE_CYC_BDATA 2
#define AMDSMB_GE_CYC_WDATA 3
#define AMDSMB_GE_CYC_PROCCALL 4
#define AMDSMB_GE_CYC_BLOCK 5
#define LSB 0x1 /* XXX: Better name: Read/Write? */
#define AMDSMB_HSTADDR (0x04)
#define AMDSMB_HSTDATA (0x06)
#define AMDSMB_HSTCMD (0x08)
#define AMDSMB_HSTDFIFO (0x09)
#define AMDSMB_HSLVDATA (0x0A)
#define AMDSMB_HSLVDA (0x0C)
#define AMDSMB_HSLVDDR (0x0E)
#define AMDSMB_SNPADDR (0x0F)
struct amdpm_softc {
int base;
int rid;
struct resource *res;
device_t smbus;
struct mtx lock;
};
#define AMDPM_LOCK(amdpm) mtx_lock(&(amdpm)->lock)
#define AMDPM_UNLOCK(amdpm) mtx_unlock(&(amdpm)->lock)
#define AMDPM_LOCK_ASSERT(amdpm) mtx_assert(&(amdpm)->lock, MA_OWNED)
#define AMDPM_SMBINB(amdpm,register) \
(bus_read_1(amdpm->res, register))
#define AMDPM_SMBOUTB(amdpm,register,value) \
(bus_write_1(amdpm->res, register, value))
#define AMDPM_SMBINW(amdpm,register) \
(bus_read_2(amdpm->res, register))
#define AMDPM_SMBOUTW(amdpm,register,value) \
(bus_write_2(amdpm->res, register, value))
static int amdpm_detach(device_t dev);
static int
amdpm_probe(device_t dev)
{
u_long base;
u_int16_t vid;
u_int16_t did;
vid = pci_get_vendor(dev);
did = pci_get_device(dev);
if ((vid == AMDPM_VENDORID_AMD) &&
((did == AMDPM_DEVICEID_AMD756PM) ||
(did == AMDPM_DEVICEID_AMD766PM) ||
(did == AMDPM_DEVICEID_AMD768PM) ||
(did == AMDPM_DEVICEID_AMD8111PM))) {
device_set_desc(dev, "AMD 756/766/768/8111 Power Management Controller");
/*
* We have to do this, since the BIOS won't give us the
* resource info (not mine, anyway).
*/
base = pci_read_config(dev, AMDPCI_PMBASE, 4);
base &= 0xff00;
bus_set_resource(dev, SYS_RES_IOPORT, AMDPCI_PMBASE,
base+0xe0, 32);
return (BUS_PROBE_DEFAULT);
}
if ((vid == AMDPM_VENDORID_NVIDIA) &&
(did == AMDPM_DEVICEID_NF_SMB)) {
device_set_desc(dev, "nForce SMBus Controller");
/*
* We have to do this, since the BIOS won't give us the
* resource info (not mine, anyway).
*/
base = pci_read_config(dev, NFPCI_PMBASE, 4);
base &= 0xff00;
bus_set_resource(dev, SYS_RES_IOPORT, NFPCI_PMBASE,
base, 32);
return (BUS_PROBE_DEFAULT);
}
return ENXIO;
}
static int
amdpm_attach(device_t dev)
{
struct amdpm_softc *amdpm_sc = device_get_softc(dev);
u_char val_b;
/* Enable I/O block access */
val_b = pci_read_config(dev, AMDPCI_GEN_CONFIG_PM, 1);
pci_write_config(dev, AMDPCI_GEN_CONFIG_PM, val_b | AMDPCI_PMIOEN, 1);
/* Allocate I/O space */
if (pci_get_vendor(dev) == AMDPM_VENDORID_AMD)
amdpm_sc->rid = AMDPCI_PMBASE;
else
amdpm_sc->rid = NFPCI_PMBASE;
amdpm_sc->res = bus_alloc_resource_any(dev, SYS_RES_IOPORT,
&amdpm_sc->rid, RF_ACTIVE);
if (amdpm_sc->res == NULL) {
device_printf(dev, "could not map i/o space\n");
return (ENXIO);
}
mtx_init(&amdpm_sc->lock, device_get_nameunit(dev), "amdpm", MTX_DEF);
/* Allocate a new smbus device */
amdpm_sc->smbus = device_add_child(dev, "smbus", -1);
if (!amdpm_sc->smbus) {
amdpm_detach(dev);
return (EINVAL);
}
bus_generic_attach(dev);
return (0);
}
static int
amdpm_detach(device_t dev)
{
struct amdpm_softc *amdpm_sc = device_get_softc(dev);
if (amdpm_sc->smbus) {
device_delete_child(dev, amdpm_sc->smbus);
amdpm_sc->smbus = NULL;
}
mtx_destroy(&amdpm_sc->lock);
if (amdpm_sc->res)
bus_release_resource(dev, SYS_RES_IOPORT, amdpm_sc->rid,
amdpm_sc->res);
return (0);
}
static int
amdpm_callback(device_t dev, int index, void *data)
{
int error = 0;
switch (index) {
case SMB_REQUEST_BUS:
case SMB_RELEASE_BUS:
break;
default:
error = EINVAL;
}
return (error);
}
static int
amdpm_clear(struct amdpm_softc *sc)
{
AMDPM_LOCK_ASSERT(sc);
AMDPM_SMBOUTW(sc, AMDSMB_GLOBAL_STATUS, AMDSMB_GS_CLEAR_STS);
DELAY(10);
return (0);
}
#if 0
static int
amdpm_abort(struct amdpm_softc *sc)
{
u_short l;
l = AMDPM_SMBINW(sc, AMDSMB_GLOBAL_ENABLE);
AMDPM_SMBOUTW(sc, AMDSMB_GLOBAL_ENABLE, l | AMDSMB_GE_ABORT);
return (0);
}
#endif
static int
amdpm_idle(struct amdpm_softc *sc)
{
u_short sts;
AMDPM_LOCK_ASSERT(sc);
sts = AMDPM_SMBINW(sc, AMDSMB_GLOBAL_STATUS);
AMDPM_DEBUG(printf("amdpm: busy? STS=0x%x\n", sts));
return (~(sts & AMDSMB_GS_HST_STS));
}
/*
* 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);
}
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(printf("amdpm: SENDB to 0x%x, byte=0x%x, error=0x%x\n", slave, byte, error));
AMDPM_UNLOCK(sc);
return (error);
}
static int
amdpm_recvb(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);
l = AMDPM_SMBINW(sc, AMDSMB_GLOBAL_ENABLE);
AMDPM_SMBOUTW(sc, AMDSMB_GLOBAL_ENABLE, (l & 0xfff8) | AMDSMB_GE_CYC_BYTE | AMDSMB_GE_HOST_STC);
if ((error = amdpm_wait(sc)) == SMB_ENOERR)
*byte = AMDPM_SMBINW(sc, AMDSMB_HSTDATA);
AMDPM_DEBUG(printf("amdpm: RECVB from 0x%x, byte=0x%x, error=0x%x\n", slave, *byte, error));
AMDPM_UNLOCK(sc);
return (error);
}
static int
amdpm_writeb(device_t dev, u_char slave, char cmd, 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);
AMDPM_SMBOUTB(sc, AMDSMB_HSTCMD, cmd);
l = AMDPM_SMBINW(sc, AMDSMB_GLOBAL_ENABLE);
AMDPM_SMBOUTW(sc, AMDSMB_GLOBAL_ENABLE, (l & 0xfff8) | AMDSMB_GE_CYC_BDATA | AMDSMB_GE_HOST_STC);
error = amdpm_wait(sc);
AMDPM_DEBUG(printf("amdpm: WRITEB to 0x%x, cmd=0x%x, byte=0x%x, error=0x%x\n", slave, cmd, byte, error));
AMDPM_UNLOCK(sc);
return (error);
}
static int
amdpm_readb(device_t dev, u_char slave, char cmd, 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_SMBOUTB(sc, AMDSMB_HSTCMD, cmd);
l = AMDPM_SMBINW(sc, AMDSMB_GLOBAL_ENABLE);
AMDPM_SMBOUTW(sc, AMDSMB_GLOBAL_ENABLE, (l & 0xfff8) | AMDSMB_GE_CYC_BDATA | AMDSMB_GE_HOST_STC);
if ((error = amdpm_wait(sc)) == SMB_ENOERR)
*byte = AMDPM_SMBINW(sc, AMDSMB_HSTDATA);
AMDPM_DEBUG(printf("amdpm: READB from 0x%x, cmd=0x%x, byte=0x%x, error=0x%x\n", slave, cmd, *byte, error));
AMDPM_UNLOCK(sc);
return (error);
}
static int
amdpm_writew(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_SMBOUTW(sc, AMDSMB_HSTDATA, word);
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);
error = amdpm_wait(sc);
AMDPM_DEBUG(printf("amdpm: WRITEW to 0x%x, cmd=0x%x, word=0x%x, error=0x%x\n", slave, cmd, word, 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_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);
}
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 devclass_t amdpm_devclass;
static device_method_t amdpm_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, amdpm_probe),
DEVMETHOD(device_attach, amdpm_attach),
DEVMETHOD(device_detach, amdpm_detach),
/* SMBus interface */
DEVMETHOD(smbus_callback, amdpm_callback),
DEVMETHOD(smbus_quick, amdpm_quick),
DEVMETHOD(smbus_sendb, amdpm_sendb),
DEVMETHOD(smbus_recvb, amdpm_recvb),
DEVMETHOD(smbus_writeb, amdpm_writeb),
DEVMETHOD(smbus_readb, amdpm_readb),
DEVMETHOD(smbus_writew, amdpm_writew),
DEVMETHOD(smbus_readw, amdpm_readw),
DEVMETHOD(smbus_bwrite, amdpm_bwrite),
DEVMETHOD(smbus_bread, amdpm_bread),
{ 0, 0 }
};
static driver_t amdpm_driver = {
"amdpm",
amdpm_methods,
sizeof(struct amdpm_softc),
};
DRIVER_MODULE(amdpm, pci, amdpm_driver, amdpm_devclass, 0, 0);
DRIVER_MODULE(smbus, amdpm, smbus_driver, smbus_devclass, 0, 0);
MODULE_DEPEND(amdpm, pci, 1, 1, 1);
MODULE_DEPEND(amdpm, smbus, SMBUS_MINVER, SMBUS_PREFVER, SMBUS_MAXVER);
MODULE_VERSION(amdpm, 1);