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ab8c137045
freebsd/sys/pci/intpm.c
John Baldwin 0d4e0cc591 Oops, fix intsmb(4) attach. Don't overwrite the 'value' holding the 
interrupt mode with the SMB revision before checking 'value' for a valid
interrupt mode.

Reported by:	Ulrich Spoerlein <uspoerlein of gmail fame>
2007-04-19 17:14:06 +00:00

781 lines
19 KiB
C
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/*-
* Copyright (c) 1998, 1999 Takanori Watanabe
* 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/module.h>
#include <sys/mutex.h>
#include <sys/rman.h>
#include <machine/bus.h>
#include <dev/smbus/smbconf.h>
#include "smbus_if.h"
#include <dev/pci/pcireg.h>
#include <dev/pci/pcivar.h>
#include <pci/intpmreg.h>
#include "opt_intpm.h"
struct intsmb_softc {
device_t dev;
struct resource *io_res;
struct resource *irq_res;
void *irq_hand;
device_t smbus;
int isbusy;
struct mtx lock;
};
#define INTSMB_LOCK(sc) mtx_lock(&(sc)->lock)
#define INTSMB_UNLOCK(sc) mtx_unlock(&(sc)->lock)
#define INTSMB_LOCK_ASSERT(sc) mtx_assert(&(sc)->lock, MA_OWNED)
static int intsmb_probe(device_t);
static int intsmb_attach(device_t);
static int intsmb_detach(device_t);
static int intsmb_intr(struct intsmb_softc *sc);
static int intsmb_slvintr(struct intsmb_softc *sc);
static void intsmb_alrintr(struct intsmb_softc *sc);
static int intsmb_callback(device_t dev, int index, void *data);
static int intsmb_quick(device_t dev, u_char slave, int how);
static int intsmb_sendb(device_t dev, u_char slave, char byte);
static int intsmb_recvb(device_t dev, u_char slave, char *byte);
static int intsmb_writeb(device_t dev, u_char slave, char cmd, char byte);
static int intsmb_writew(device_t dev, u_char slave, char cmd, short word);
static int intsmb_readb(device_t dev, u_char slave, char cmd, char *byte);
static int intsmb_readw(device_t dev, u_char slave, char cmd, short *word);
static int intsmb_pcall(device_t dev, u_char slave, char cmd, short sdata, short *rdata);
static int intsmb_bwrite(device_t dev, u_char slave, char cmd, u_char count, char *buf);
static int intsmb_bread(device_t dev, u_char slave, char cmd, u_char *count, char *buf);
static void intsmb_start(struct intsmb_softc *sc, u_char cmd, int nointr);
static int intsmb_stop(struct intsmb_softc *sc);
static int intsmb_stop_poll(struct intsmb_softc *sc);
static int intsmb_free(struct intsmb_softc *sc);
static void intsmb_rawintr(void *arg);
static int
intsmb_probe(device_t dev)
{
switch (pci_get_devid(dev)) {
case 0x71138086: /* Intel 82371AB */
case 0x719b8086: /* Intel 82443MX */
#if 0
/* Not a good idea yet, this stops isab0 functioning */
case 0x02001166: /* ServerWorks OSB4 */
#endif
device_set_desc(dev, "Intel PIIX4 SMBUS Interface");
break;
default:
return (ENXIO);
}
return (BUS_PROBE_DEFAULT);
}
static int
intsmb_attach(device_t dev)
{
struct intsmb_softc *sc = device_get_softc(dev);
int error, rid, value;
char *str;
mtx_init(&sc->lock, device_get_nameunit(dev), "intsmb", MTX_DEF);
rid = PCI_BASE_ADDR_SMB;
sc->io_res = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &rid,
RF_ACTIVE);
if (sc->io_res == NULL) {
device_printf(dev, "Could not allocate I/O space\n");
error = ENXIO;
goto fail;
}
#ifndef NO_CHANGE_PCICONF
pci_write_config(dev, PCIR_INTLINE, 0x9, 1);
pci_write_config(dev, PCI_HST_CFG_SMB,
PCI_INTR_SMB_IRQ9 | PCI_INTR_SMB_ENABLE, 1);
#endif
value = pci_read_config(dev, PCI_HST_CFG_SMB, 1);
switch (value & 0xe) {
case PCI_INTR_SMB_SMI:
str = "SMI";
break;
case PCI_INTR_SMB_IRQ9:
str = "IRQ 9";
break;
default:
str = "BOGUS";
}
device_printf(dev, "intr %s %s ", str,
(value & 1) ? "enabled" : "disabled");
printf("revision %d\n", pci_read_config(dev, PCI_REVID_SMB, 1));
if ((value & 0xe) != PCI_INTR_SMB_IRQ9) {
device_printf(dev, "Unsupported interrupt mode\n");
error = ENXIO;
goto fail;
}
/* Force IRQ 9. */
rid = 0;
bus_set_resource(dev, SYS_RES_IRQ, rid, 9, 1);
sc->irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
RF_SHAREABLE | RF_ACTIVE);
if (sc->irq_res == NULL) {
device_printf(dev, "Could not allocate irq\n");
error = ENXIO;
goto fail;
}
error = bus_setup_intr(dev, sc->irq_res, INTR_TYPE_MISC, NULL,
intsmb_rawintr, sc, &sc->irq_hand);
if (error) {
device_printf(dev, "Failed to map intr\n");
goto fail;
}
value = pci_read_config(dev, PCI_BASE_ADDR_PM, 4);
device_printf(dev, "PM %s %x\n", (value & 1) ? "I/O mapped" : "Memory",
value & 0xfffe);
sc->isbusy = 0;
sc->smbus = device_add_child(dev, "smbus", -1);
if (sc->smbus == NULL) {
error = ENXIO;
goto fail;
}
error = device_probe_and_attach(sc->smbus);
if (error)
goto fail;
#ifdef ENABLE_ALART
/* Enable Arart */
bus_write_1(sc->io_res, PIIX4_SMBSLVCNT, PIIX4_SMBSLVCNT_ALTEN);
#endif
return (0);
fail:
intsmb_detach(dev);
return (error);
}
static int
intsmb_detach(device_t dev)
{
struct intsmb_softc *sc = device_get_softc(dev);
int error;
error = bus_generic_detach(dev);
if (error)
return (error);
if (sc->smbus)
device_delete_child(dev, sc->smbus);
if (sc->irq_hand)
bus_teardown_intr(dev, sc->irq_res, sc->irq_hand);
if (sc->irq_res)
bus_release_resource(dev, SYS_RES_IRQ, 0, sc->irq_res);
if (sc->io_res)
bus_release_resource(dev, SYS_RES_IOPORT, PCI_BASE_ADDR_SMB,
sc->io_res);
mtx_destroy(&sc->lock);
return (0);
}
static void
intsmb_rawintr(void *arg)
{
struct intsmb_softc *sc = arg;
INTSMB_LOCK(sc);
intsmb_intr(sc);
intsmb_slvintr(sc);
INTSMB_UNLOCK(sc);
}
static int
intsmb_callback(device_t dev, int index, void *data)
{
int error = 0;
switch (index) {
case SMB_REQUEST_BUS:
break;
case SMB_RELEASE_BUS:
break;
default:
error = EINVAL;
}
return (error);
}
/* Counterpart of smbtx_smb_free(). */
static int
intsmb_free(struct intsmb_softc *sc)
{
INTSMB_LOCK_ASSERT(sc);
if ((bus_read_1(sc->io_res, PIIX4_SMBHSTSTS) & PIIX4_SMBHSTSTAT_BUSY) ||
#ifdef ENABLE_ALART
(bus_read_1(sc->io_res, PIIX4_SMBSLVSTS) & PIIX4_SMBSLVSTS_BUSY) ||
#endif
sc->isbusy)
return (SMB_EBUSY);
sc->isbusy = 1;
/* Disable Interrupt in slave part. */
#ifndef ENABLE_ALART
bus_write_1(sc->io_res, PIIX4_SMBSLVCNT, 0);
#endif
/* Reset INTR Flag to prepare INTR. */
bus_write_1(sc->io_res, PIIX4_SMBHSTSTS,
PIIX4_SMBHSTSTAT_INTR | PIIX4_SMBHSTSTAT_ERR |
PIIX4_SMBHSTSTAT_BUSC | PIIX4_SMBHSTSTAT_FAIL);
return (0);
}
static int
intsmb_intr(struct intsmb_softc *sc)
{
int status, tmp;
status = bus_read_1(sc->io_res, PIIX4_SMBHSTSTS);
if (status & PIIX4_SMBHSTSTAT_BUSY)
return (1);
if (status & (PIIX4_SMBHSTSTAT_INTR | PIIX4_SMBHSTSTAT_ERR |
PIIX4_SMBHSTSTAT_BUSC | PIIX4_SMBHSTSTAT_FAIL)) {
tmp = bus_read_1(sc->io_res, PIIX4_SMBHSTCNT);
bus_write_1(sc->io_res, PIIX4_SMBHSTCNT,
tmp & ~PIIX4_SMBHSTCNT_INTREN);
if (sc->isbusy) {
sc->isbusy = 0;
wakeup(sc);
}
return (0);
}
return (1); /* Not Completed */
}
static int
intsmb_slvintr(struct intsmb_softc *sc)
{
int status;
status = bus_read_1(sc->io_res, PIIX4_SMBSLVSTS);
if (status & PIIX4_SMBSLVSTS_BUSY)
return (1);
if (status & PIIX4_SMBSLVSTS_ALART)
intsmb_alrintr(sc);
else if (status & ~(PIIX4_SMBSLVSTS_ALART | PIIX4_SMBSLVSTS_SDW2
| PIIX4_SMBSLVSTS_SDW1)) {
}
/* Reset Status Register */
bus_write_1(sc->io_res, PIIX4_SMBSLVSTS,
PIIX4_SMBSLVSTS_ALART | PIIX4_SMBSLVSTS_SDW2 |
PIIX4_SMBSLVSTS_SDW1 | PIIX4_SMBSLVSTS_SLV);
return (0);
}
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 void
intsmb_start(struct intsmb_softc *sc, unsigned char cmd, int nointr)
{
unsigned char tmp;
INTSMB_LOCK_ASSERT(sc);
tmp = bus_read_1(sc->io_res, PIIX4_SMBHSTCNT);
tmp &= 0xe0;
tmp |= cmd;
tmp |= PIIX4_SMBHSTCNT_START;
/* While not in autoconfiguration enable interrupts. */
if (!cold || !nointr)
tmp |= PIIX4_SMBHSTCNT_INTREN;
bus_write_1(sc->io_res, PIIX4_SMBHSTCNT, tmp);
}
static int
intsmb_error(int status)
{
int error = 0;
if (status & PIIX4_SMBHSTSTAT_ERR)
error |= SMB_EBUSERR;
if (status & PIIX4_SMBHSTSTAT_BUSC)
error |= SMB_ECOLLI;
if (status & PIIX4_SMBHSTSTAT_FAIL)
error |= SMB_ENOACK;
return (error);
}
/*
* Polling Code.
*
* Polling is not encouraged because it requires waiting for the
* device if it is busy.
* (29063505.pdf from Intel) But during boot, interrupt cannot be used, so use
* polling code then.
*/
static int
intsmb_stop_poll(struct intsmb_softc *sc)
{
int error, i, status, tmp;
INTSMB_LOCK_ASSERT(sc);
/* First, wait for busy to be set. */
for (i = 0; i < 0x7fff; i++)
if (bus_read_1(sc->io_res, PIIX4_SMBHSTSTS) &
PIIX4_SMBHSTSTAT_BUSY)
break;
/* Wait for busy to clear. */
for (i = 0; i < 0x7fff; i++) {
status = bus_read_1(sc->io_res, PIIX4_SMBHSTSTS);
if (!(status & PIIX4_SMBHSTSTAT_BUSY)) {
sc->isbusy = 0;
error = intsmb_error(status);
if (error == 0 && !(status & PIIX4_SMBHSTSTAT_INTR))
device_printf(sc->dev, "unknown cause why?");
return (error);
}
}
/* Timed out waiting for busy to clear. */
sc->isbusy = 0;
tmp = bus_read_1(sc->io_res, PIIX4_SMBHSTCNT);
bus_write_1(sc->io_res, PIIX4_SMBHSTCNT, tmp & ~PIIX4_SMBHSTCNT_INTREN);
return (SMB_ETIMEOUT);
}
/*
* Wait for completion and return result.
*/
static int
intsmb_stop(struct intsmb_softc *sc)
{
int error, status;
INTSMB_LOCK_ASSERT(sc);
if (cold)
/* So that it can use device during device probe on SMBus. */
return (intsmb_stop_poll(sc));
error = tsleep(sc, PWAIT | PCATCH, "SMBWAI", hz / 8);
if (error == 0) {
status = bus_read_1(sc->io_res, PIIX4_SMBHSTSTS);
if (!(status & PIIX4_SMBHSTSTAT_BUSY)) {
error = intsmb_error(status);
if (error == 0 && !(status & PIIX4_SMBHSTSTAT_INTR))
device_printf(sc->dev, "unknown cause why?\n");
#ifdef ENABLE_ALART
bus_write_1(sc->io_res, PIIX4_SMBSLVCNT,
PIIX4_SMBSLVCNT_ALTEN);
#endif
return (error);
}
}
/* Timeout Procedure. */
sc->isbusy = 0;
/* Re-enable supressed interrupt from slave part. */
bus_write_1(sc->io_res, PIIX4_SMBSLVCNT, PIIX4_SMBSLVCNT_ALTEN);
if (error == EWOULDBLOCK)
return (SMB_ETIMEOUT);
else
return (SMB_EABORT);
}
static int
intsmb_quick(device_t dev, u_char slave, int how)
{
struct intsmb_softc *sc = device_get_softc(dev);
int error;
u_char data;
data = slave;
/* Quick command is part of Address, I think. */
switch(how) {
case SMB_QWRITE:
data &= ~LSB;
break;
case SMB_QREAD:
data |= LSB;
break;
default:
return (EINVAL);
}
INTSMB_LOCK(sc);
error = intsmb_free(sc);
if (error) {
INTSMB_UNLOCK(sc);
return (error);
}
bus_write_1(sc->io_res, PIIX4_SMBHSTADD, data);
intsmb_start(sc, PIIX4_SMBHSTCNT_PROT_QUICK, 0);
error = intsmb_stop(sc);
INTSMB_UNLOCK(sc);
return (error);
}
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_recvb(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);
intsmb_start(sc, PIIX4_SMBHSTCNT_PROT_BYTE, 0);
error = intsmb_stop(sc);
if (error == 0) {
#ifdef RECV_IS_IN_CMD
/*
* Linux SMBus stuff also troubles
* Because Intel's datasheet does not make clear.
*/
*byte = bus_read_1(sc->io_res, PIIX4_SMBHSTCMD);
#else
*byte = bus_read_1(sc->io_res, PIIX4_SMBHSTDAT0);
#endif
}
INTSMB_UNLOCK(sc);
return (error);
}
static int
intsmb_writeb(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);
bus_write_1(sc->io_res, PIIX4_SMBHSTDAT0, byte);
intsmb_start(sc, PIIX4_SMBHSTCNT_PROT_BDATA, 0);
error = intsmb_stop(sc);
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_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_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);
}
/*
* Data sheet claims that it implements all function, but also claims
* that it implements 7 function and not mention PCALL. So I don't know
* whether it will work.
*/
static int
intsmb_pcall(device_t dev, u_char slave, char cmd, short sdata, short *rdata)
{
#ifdef PROCCALL_TEST
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, sdata & 0xff);
bus_write_1(sc->io_res, PIIX4_SMBHSTDAT1, (sdata & 0xff) >> 8);
intsmb_start(sc, PIIX4_SMBHSTCNT_PROT_WDATA, 0);
error = intsmb_stop(sc);
if (error == 0) {
*rdata = bus_read_1(sc->io_res, PIIX4_SMBHSTDAT0);
*rdata |= bus_read_1(sc->io_res, PIIX4_SMBHSTDAT1) << 8;
}
INTSMB_UNLOCK(sc);
return (error);
#else
return (SMB_ENOTSUPP);
#endif
}
static int
intsmb_bwrite(device_t dev, u_char slave, char cmd, u_char count, char *buf)
{
struct intsmb_softc *sc = device_get_softc(dev);
int error, i;
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);
for (i = 0; i < count; i++)
bus_write_1(sc->io_res, PIIX4_SMBBLKDAT, buf[i]);
bus_write_1(sc->io_res, PIIX4_SMBHSTDAT0, count);
intsmb_start(sc, PIIX4_SMBHSTCNT_PROT_BLOCK, 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 = EIO;
}
INTSMB_UNLOCK(sc);
return (error);
}
static devclass_t intsmb_devclass;
static device_method_t intsmb_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, intsmb_probe),
DEVMETHOD(device_attach, intsmb_attach),
DEVMETHOD(device_detach, intsmb_detach),
/* Bus interface */
DEVMETHOD(bus_print_child, bus_generic_print_child),
/* SMBus interface */
DEVMETHOD(smbus_callback, intsmb_callback),
DEVMETHOD(smbus_quick, intsmb_quick),
DEVMETHOD(smbus_sendb, intsmb_sendb),
DEVMETHOD(smbus_recvb, intsmb_recvb),
DEVMETHOD(smbus_writeb, intsmb_writeb),
DEVMETHOD(smbus_writew, intsmb_writew),
DEVMETHOD(smbus_readb, intsmb_readb),
DEVMETHOD(smbus_readw, intsmb_readw),
DEVMETHOD(smbus_pcall, intsmb_pcall),
DEVMETHOD(smbus_bwrite, intsmb_bwrite),
DEVMETHOD(smbus_bread, intsmb_bread),
{ 0, 0 }
};
static driver_t intsmb_driver = {
"intsmb",
intsmb_methods,
sizeof(struct intsmb_softc),
};
DRIVER_MODULE(intsmb, pci, intsmb_driver, intsmb_devclass, 0, 0);
DRIVER_MODULE(smbus, intsmb, smbus_driver, smbus_devclass, 0, 0);
MODULE_DEPEND(intsmb, smbus, SMBUS_MINVER, SMBUS_PREFVER, SMBUS_MAXVER);
MODULE_VERSION(intsmb, 1);
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