freebsd-dev/sys/pci/amdpm.c
Murray Stokely c896039b9b SMBus support for the AMD 756 power management unit. See smbus(4),
amdpm(4) and smb(4).

This device can be used with userland programs such as sysutils/lmmon
to retrieve sensor information from the motherboard.

PR:		   kern/23989
Obtained from:	   Matthew C. Forman <mcf@dmu.ac.uk>
Based on:	   alpm(4)
2001-09-16 22:35:07 +00:00

635 lines
16 KiB
C

/*-
* 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.
*
* $FreeBSD$
*
*/
/*
* Power management function/SMBus function support for the AMD 756 chip.
*/
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/systm.h>
#include <sys/module.h>
#include <sys/bus.h>
#include <sys/uio.h>
#include <machine/bus_pio.h>
#include <machine/bus_memio.h>
#include <machine/bus.h>
#include <machine/clock.h>
#include <machine/resource.h>
#include <sys/rman.h>
#include <pci/pcivar.h>
#include <pci/pcireg.h>
#include <dev/iicbus/iiconf.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
/* PCI Configuration space registers */
#define AMDPCI_PMBASE 0x58
#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 0xE0
#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 0xE2
#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 AMDSMB_HSTADDR 0xE4
#define AMDSMB_HSTDATA 0xE6
#define AMDSMB_HSTCMD 0xE8
#define AMDSMB_HSTDFIFO 0xE9
#define AMDSMB_HSLVDATA 0xEA
#define AMDSMB_HSLVDA 0xEC
#define AMDSMB_HSLVDDR 0xEE
#define AMDSMB_SNPADDR 0xEF
struct amdpm_softc {
int base;
int rid;
struct resource *res;
bus_space_tag_t smbst;
bus_space_handle_t smbsh;
};
struct amdsmb_softc {
int base;
device_t smbus;
struct amdpm_softc *amdpm;
};
#define AMDPM_SMBINB(amdsmb,register) \
(bus_space_read_1(amdsmb->amdpm->smbst, amdsmb->amdpm->smbsh, register))
#define AMDPM_SMBOUTB(amdsmb,register,value) \
(bus_space_write_1(amdsmb->amdpm->smbst, amdsmb->amdpm->smbsh, register, value))
#define AMDPM_SMBINW(amdsmb,register) \
(bus_space_read_2(amdsmb->amdpm->smbst, amdsmb->amdpm->smbsh, register))
#define AMDPM_SMBOUTW(amdsmb,register,value) \
(bus_space_write_2(amdsmb->amdpm->smbst, amdsmb->amdpm->smbsh, register, value))
static int amdsmb_probe(device_t);
static int amdsmb_attach(device_t);
static int amdsmb_smb_callback(device_t, int, caddr_t *);
static int amdsmb_smb_quick(device_t dev, u_char slave, int how);
static int amdsmb_smb_sendb(device_t dev, u_char slave, char byte);
static int amdsmb_smb_recvb(device_t dev, u_char slave, char *byte);
static int amdsmb_smb_writeb(device_t dev, u_char slave, char cmd, char byte);
static int amdsmb_smb_readb(device_t dev, u_char slave, char cmd, char *byte);
static int amdsmb_smb_writew(device_t dev, u_char slave, char cmd, short word);
static int amdsmb_smb_readw(device_t dev, u_char slave, char cmd, short *word);
static int amdsmb_smb_bwrite(device_t dev, u_char slave, char cmd, u_char count, char *buf);
static int amdsmb_smb_bread(device_t dev, u_char slave, char cmd, u_char count, char *byte);
static int amdpm_probe(device_t);
static int amdpm_attach(device_t);
static int
amdpm_probe(device_t dev)
{
u_long base;
if ((pci_get_vendor(dev) == AMDPM_VENDORID_AMD) &&
(pci_get_device(dev) == AMDPM_DEVICEID_AMD756PM)) {
device_set_desc(dev, "AMD 756 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, 256);
return (0);
}
return ENXIO;
}
static int
amdpm_attach(device_t dev)
{
struct amdpm_softc *amdpm_sc = device_get_softc(dev);
u_char val_b;
int unit = device_get_unit(dev);
device_t smbinterface;
/* 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 */
amdpm_sc->rid = AMDPCI_PMBASE;
amdpm_sc->res = bus_alloc_resource(dev, SYS_RES_IOPORT, &amdpm_sc->rid, 0, ~0, 1, RF_ACTIVE);
if (amdpm_sc->res == NULL) {
device_printf(dev, "could not map i/o space\n");
return (ENXIO);
}
amdpm_sc->smbst = rman_get_bustag(amdpm_sc->res);
amdpm_sc->smbsh = rman_get_bushandle(amdpm_sc->res);
smbinterface = device_add_child(dev, "amdsmb", unit);
if (!smbinterface)
device_printf(dev, "could not add SMBus device\n");
else
device_probe_and_attach(smbinterface);
return (0);
}
static int
amdsmb_probe(device_t dev)
{
struct amdsmb_softc *amdsmb_sc = (struct amdsmb_softc *)device_get_softc(dev);
/* Allocate a new smbus device */
amdsmb_sc->smbus = smbus_alloc_bus(dev);
if (!amdsmb_sc->smbus)
return (EINVAL);
device_set_desc(dev, "AMD 756 SMBus interface");
device_printf(dev, "AMD 756 SMBus interface\n");
return (0);
}
static int
amdsmb_attach(device_t dev)
{
struct amdsmb_softc *amdsmb_sc = (struct amdsmb_softc *)device_get_softc(dev);
amdsmb_sc->amdpm = device_get_softc(device_get_parent(dev));
/* Probe and attach the smbus */
device_probe_and_attach(amdsmb_sc->smbus);
return (0);
}
static int
amdsmb_smb_callback(device_t dev, int index, caddr_t *data)
{
int error = 0;
switch (index) {
case SMB_REQUEST_BUS:
case SMB_RELEASE_BUS:
break;
default:
error = EINVAL;
}
return (error);
}
static int
amdsmb_clear(struct amdsmb_softc *sc)
{
AMDPM_SMBOUTW(sc, AMDSMB_GLOBAL_STATUS, AMDSMB_GS_CLEAR_STS);
DELAY(10);
return (0);
}
static int
amdsmb_abort(struct amdsmb_softc *sc)
{
u_short l;
l = AMDPM_SMBINW(sc, AMDSMB_GLOBAL_ENABLE);
AMDPM_SMBOUTW(sc, AMDSMB_GLOBAL_ENABLE, l | AMDSMB_GE_ABORT);
return (0);
}
static int
amdsmb_idle(struct amdsmb_softc *sc)
{
u_short sts;
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
amdsmb_wait(struct amdsmb_softc *sc)
{
int count = 10000;
u_short sts = 0;
int error;
/* 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)
amdsmb_clear(sc);
return (error);
}
static int
amdsmb_smb_quick(device_t dev, u_char slave, int how)
{
struct amdsmb_softc *sc = (struct amdsmb_softc *)device_get_softc(dev);
int error;
u_short l;
amdsmb_clear(sc);
if (!amdsmb_idle(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)!", __FUNCTION__, 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 = amdsmb_wait(sc);
AMDPM_DEBUG(printf(", error=0x%x\n", error));
return (error);
}
static int
amdsmb_smb_sendb(device_t dev, u_char slave, char byte)
{
struct amdsmb_softc *sc = (struct amdsmb_softc *)device_get_softc(dev);
int error;
u_short l;
amdsmb_clear(sc);
if (!amdsmb_idle(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 = amdsmb_wait(sc);
AMDPM_DEBUG(printf("amdpm: SENDB to 0x%x, byte=0x%x, error=0x%x\n", slave, byte, error));
return (error);
}
static int
amdsmb_smb_recvb(device_t dev, u_char slave, char *byte)
{
struct amdsmb_softc *sc = (struct amdsmb_softc *)device_get_softc(dev);
int error;
u_short l;
amdsmb_clear(sc);
if (!amdsmb_idle(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 = amdsmb_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));
return (error);
}
static int
amdsmb_smb_writeb(device_t dev, u_char slave, char cmd, char byte)
{
struct amdsmb_softc *sc = (struct amdsmb_softc *)device_get_softc(dev);
int error;
u_short l;
amdsmb_clear(sc);
if (!amdsmb_idle(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 = amdsmb_wait(sc);
AMDPM_DEBUG(printf("amdpm: WRITEB to 0x%x, cmd=0x%x, byte=0x%x, error=0x%x\n", slave, cmd, byte, error));
return (error);
}
static int
amdsmb_smb_readb(device_t dev, u_char slave, char cmd, char *byte)
{
struct amdsmb_softc *sc = (struct amdsmb_softc *)device_get_softc(dev);
int error;
u_short l;
amdsmb_clear(sc);
if (!amdsmb_idle(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 = amdsmb_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));
return (error);
}
static int
amdsmb_smb_writew(device_t dev, u_char slave, char cmd, short word)
{
struct amdsmb_softc *sc = (struct amdsmb_softc *)device_get_softc(dev);
int error;
u_short l;
amdsmb_clear(sc);
if (!amdsmb_idle(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 = amdsmb_wait(sc);
AMDPM_DEBUG(printf("amdpm: WRITEW to 0x%x, cmd=0x%x, word=0x%x, error=0x%x\n", slave, cmd, word, error));
return (error);
}
static int
amdsmb_smb_readw(device_t dev, u_char slave, char cmd, short *word)
{
struct amdsmb_softc *sc = (struct amdsmb_softc *)device_get_softc(dev);
int error;
u_short l;
amdsmb_clear(sc);
if (!amdsmb_idle(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 = amdsmb_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));
return (error);
}
static int
amdsmb_smb_bwrite(device_t dev, u_char slave, char cmd, u_char count, char *buf)
{
struct amdsmb_softc *sc = (struct amdsmb_softc *)device_get_softc(dev);
u_char remain, len, i;
int error = SMB_ENOERR;
u_short l;
amdsmb_clear(sc);
if(!amdsmb_idle(sc))
return (SMB_EBUSY);
remain = count;
while (remain) {
len = min(remain, 32);
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, len);
/* Fill the 32-byte internal buffer */
for (i=0; i<len; i++) {
AMDPM_SMBOUTB(sc, AMDSMB_HSTDFIFO, buf[count-remain+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);
if ((error = amdsmb_wait(sc)) != SMB_ENOERR)
goto error;
remain -= len;
}
error:
AMDPM_DEBUG(printf("amdpm: WRITEBLK to 0x%x, count=0x%x, cmd=0x%x, error=0x%x", slave, count, cmd, error));
return (error);
}
static int
amdsmb_smb_bread(device_t dev, u_char slave, char cmd, u_char count, char *buf)
{
struct amdsmb_softc *sc = (struct amdsmb_softc *)device_get_softc(dev);
u_char remain, len, i;
int error = SMB_ENOERR;
u_short l;
amdsmb_clear(sc);
if (!amdsmb_idle(sc))
return (SMB_EBUSY);
remain = count;
while (remain) {
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 = amdsmb_wait(sc)) != SMB_ENOERR)
goto error;
len = AMDPM_SMBINW(sc, AMDSMB_HSTDATA);
/* Read the 32-byte internal buffer */
for (i=0; i<len; i++) {
buf[count-remain+i] = AMDPM_SMBINB(sc, AMDSMB_HSTDFIFO);
DELAY(2);
}
remain -= len;
}
error:
AMDPM_DEBUG(printf("amdpm: READBLK to 0x%x, count=0x%x, cmd=0x%x, error=0x%x", slave, count, cmd, error));
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),
{ 0, 0 }
};
static driver_t amdpm_driver = {
"amdpm",
amdpm_methods,
sizeof(struct amdpm_softc),
};
static devclass_t amdsmb_devclass;
static device_method_t amdsmb_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, amdsmb_probe),
DEVMETHOD(device_attach, amdsmb_attach),
/* Bus interface */
DEVMETHOD(bus_print_child, bus_generic_print_child),
/* SMBus interface */
DEVMETHOD(smbus_callback, amdsmb_smb_callback),
DEVMETHOD(smbus_quick, amdsmb_smb_quick),
DEVMETHOD(smbus_sendb, amdsmb_smb_sendb),
DEVMETHOD(smbus_recvb, amdsmb_smb_recvb),
DEVMETHOD(smbus_writeb, amdsmb_smb_writeb),
DEVMETHOD(smbus_readb, amdsmb_smb_readb),
DEVMETHOD(smbus_writew, amdsmb_smb_writew),
DEVMETHOD(smbus_readw, amdsmb_smb_readw),
DEVMETHOD(smbus_bwrite, amdsmb_smb_bwrite),
DEVMETHOD(smbus_bread, amdsmb_smb_bread),
{ 0, 0 }
};
static driver_t amdsmb_driver = {
"amdsmb",
amdsmb_methods,
sizeof(struct amdsmb_softc),
};
DRIVER_MODULE(amdpm, pci, amdpm_driver, amdpm_devclass, 0, 0);
DRIVER_MODULE(amdsmb, amdpm, amdsmb_driver, amdsmb_devclass, 0, 0);