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freebsd-dev/sys/dev/intpm/intpm.c
Warner Losh 329e817fcc Reapply, with minor tweaks, r338025, from the original commit: 
Remove unused and easy to misuse PNP macro parameter

Inspired by r338025, just remove the element size parameter to the
MODULE_PNP_INFO macro entirely.  The 'table' parameter is now required to
have correct pointer (or array) type.  Since all invocations of the macro
already had this property and the emitted PNP data continues to include the
element size, there is no functional change.

Mostly done with the coccinelle 'spatch' tool:

  $ cat modpnpsize0.cocci
    @normaltables@
    identifier b,c;
    expression a,d,e;
    declarer MODULE_PNP_INFO;
    @@
     MODULE_PNP_INFO(a,b,c,d,
    -sizeof(d[0]),
     e);

    @singletons@
    identifier b,c,d;
    expression a;
    declarer MODULE_PNP_INFO;
    @@
     MODULE_PNP_INFO(a,b,c,&d,
    -sizeof(d),
     1);

  $ rg -l MODULE_PNP_INFO -- sys | \
    xargs spatch --in-place --sp-file modpnpsize0.cocci

(Note that coccinelle invokes diff(1) via a PATH search and expects diff to
tolerate the -B flag, which BSD diff does not.  So I had to link gdiff into
PATH as diff to use spatch.)

Tinderbox'd (-DMAKE_JUST_KERNELS).
Approved by: re (glen)
2018-09-26 17:12:14 +00:00

900 lines
22 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 <dev/intpm/intpmreg.h>
#include <dev/amdsbwd/amd_chipset.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 io_rid;
int isbusy;
int cfg_irq9;
int sb8xx;
int poll;
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);
const struct intsmb_device {
uint32_t devid;
const char *description;
} intsmb_products[] = {
{ 0x71138086, "Intel PIIX4 SMBUS Interface" },
{ 0x719b8086, "Intel PIIX4 SMBUS Interface" },
#if 0
/* Not a good idea yet, this stops isab0 functioning */
{ 0x02001166, "ServerWorks OSB4" },
#endif
{ 0x43721002, "ATI IXP400 SMBus Controller" },
{ AMDSB_SMBUS_DEVID, "AMD SB600/7xx/8xx/9xx SMBus Controller" },
{ AMDFCH_SMBUS_DEVID, "AMD FCH SMBus Controller" },
{ AMDCZ_SMBUS_DEVID, "AMD FCH SMBus Controller" },
};
static int
intsmb_probe(device_t dev)
{
const struct intsmb_device *isd;
uint32_t devid;
size_t i;
devid = pci_get_devid(dev);
for (i = 0; i < nitems(intsmb_products); i++) {
isd = &intsmb_products[i];
if (isd->devid == devid) {
device_set_desc(dev, isd->description);
return (BUS_PROBE_DEFAULT);
}
}
return (ENXIO);
}
static uint8_t
amd_pmio_read(struct resource *res, uint8_t reg)
{
bus_write_1(res, 0, reg); /* Index */
return (bus_read_1(res, 1)); /* Data */
}
static int
sb8xx_attach(device_t dev)
{
static const int AMDSB_SMBIO_WIDTH = 0x10;
struct intsmb_softc *sc;
struct resource *res;
uint32_t devid;
uint8_t revid;
uint16_t addr;
int rid;
int rc;
bool enabled;
sc = device_get_softc(dev);
rid = 0;
rc = bus_set_resource(dev, SYS_RES_IOPORT, rid, AMDSB_PMIO_INDEX,
AMDSB_PMIO_WIDTH);
if (rc != 0) {
device_printf(dev, "bus_set_resource for PM IO failed\n");
return (ENXIO);
}
res = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &rid,
RF_ACTIVE);
if (res == NULL) {
device_printf(dev, "bus_alloc_resource for PM IO failed\n");
return (ENXIO);
}
devid = pci_get_devid(dev);
revid = pci_get_revid(dev);
if (devid == AMDSB_SMBUS_DEVID ||
(devid == AMDFCH_SMBUS_DEVID && revid < AMDFCH41_SMBUS_REVID) ||
(devid == AMDCZ_SMBUS_DEVID && revid < AMDCZ49_SMBUS_REVID)) {
addr = amd_pmio_read(res, AMDSB8_PM_SMBUS_EN + 1);
addr <<= 8;
addr |= amd_pmio_read(res, AMDSB8_PM_SMBUS_EN);
enabled = (addr & AMDSB8_SMBUS_EN) != 0;
addr &= AMDSB8_SMBUS_ADDR_MASK;
} else {
addr = amd_pmio_read(res, AMDFCH41_PM_DECODE_EN0);
enabled = (addr & AMDFCH41_SMBUS_EN) != 0;
addr = amd_pmio_read(res, AMDFCH41_PM_DECODE_EN1);
addr <<= 8;
}
bus_release_resource(dev, SYS_RES_IOPORT, rid, res);
bus_delete_resource(dev, SYS_RES_IOPORT, rid);
if (!enabled) {
device_printf(dev, "SB8xx/SB9xx/FCH SMBus not enabled\n");
return (ENXIO);
}
sc->io_rid = 0;
rc = bus_set_resource(dev, SYS_RES_IOPORT, sc->io_rid, addr,
AMDSB_SMBIO_WIDTH);
if (rc != 0) {
device_printf(dev, "bus_set_resource for SMBus IO failed\n");
return (ENXIO);
}
sc->io_res = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &sc->io_rid,
RF_ACTIVE);
if (sc->io_res == NULL) {
device_printf(dev, "Could not allocate I/O space\n");
return (ENXIO);
}
sc->poll = 1;
return (0);
}
static void
intsmb_release_resources(device_t dev)
{
struct intsmb_softc *sc = device_get_softc(dev);
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, sc->io_rid,
sc->io_res);
mtx_destroy(&sc->lock);
}
static int
intsmb_attach(device_t dev)
{
struct intsmb_softc *sc = device_get_softc(dev);
int error, rid, value;
int intr;
char *str;
sc->dev = dev;
mtx_init(&sc->lock, device_get_nameunit(dev), "intsmb", MTX_DEF);
sc->cfg_irq9 = 0;
switch (pci_get_devid(dev)) {
#ifndef NO_CHANGE_PCICONF
case 0x71138086: /* Intel 82371AB */
case 0x719b8086: /* Intel 82443MX */
/* Changing configuration is allowed. */
sc->cfg_irq9 = 1;
break;
#endif
case AMDSB_SMBUS_DEVID:
if (pci_get_revid(dev) >= AMDSB8_SMBUS_REVID)
sc->sb8xx = 1;
break;
case AMDFCH_SMBUS_DEVID:
case AMDCZ_SMBUS_DEVID:
sc->sb8xx = 1;
break;
}
if (sc->sb8xx) {
error = sb8xx_attach(dev);
if (error != 0)
goto fail;
else
goto no_intr;
}
sc->io_rid = PCI_BASE_ADDR_SMB;
sc->io_res = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &sc->io_rid,
RF_ACTIVE);
if (sc->io_res == NULL) {
device_printf(dev, "Could not allocate I/O space\n");
error = ENXIO;
goto fail;
}
if (sc->cfg_irq9) {
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);
}
value = pci_read_config(dev, PCI_HST_CFG_SMB, 1);
sc->poll = (value & PCI_INTR_SMB_ENABLE) == 0;
intr = value & PCI_INTR_SMB_MASK;
switch (intr) {
case PCI_INTR_SMB_SMI:
str = "SMI";
break;
case PCI_INTR_SMB_IRQ9:
str = "IRQ 9";
break;
case PCI_INTR_SMB_IRQ_PCI:
str = "PCI IRQ";
break;
default:
str = "BOGUS";
}
device_printf(dev, "intr %s %s ", str,
sc->poll == 0 ? "enabled" : "disabled");
printf("revision %d\n", pci_read_config(dev, PCI_REVID_SMB, 1));
if (!sc->poll && intr == PCI_INTR_SMB_SMI) {
device_printf(dev,
"using polling mode when configured interrupt is SMI\n");
sc->poll = 1;
}
if (sc->poll)
goto no_intr;
if (intr != PCI_INTR_SMB_IRQ9 && intr != PCI_INTR_SMB_IRQ_PCI) {
device_printf(dev, "Unsupported interrupt mode\n");
error = ENXIO;
goto fail;
}
/* Force IRQ 9. */
rid = 0;
if (sc->cfg_irq9)
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 | INTR_MPSAFE,
NULL, intsmb_rawintr, sc, &sc->irq_hand);
if (error) {
device_printf(dev, "Failed to map intr\n");
goto fail;
}
no_intr:
sc->isbusy = 0;
sc->smbus = device_add_child(dev, "smbus", -1);
if (sc->smbus == NULL) {
device_printf(dev, "failed to add smbus child\n");
error = ENXIO;
goto fail;
}
error = device_probe_and_attach(sc->smbus);
if (error) {
device_printf(dev, "failed to probe+attach smbus child\n");
goto fail;
}
#ifdef ENABLE_ALART
/* Enable Arart */
bus_write_1(sc->io_res, PIIX4_SMBSLVCNT, PIIX4_SMBSLVCNT_ALTEN);
#endif
return (0);
fail:
intsmb_release_resources(dev);
return (error);
}
static int
intsmb_detach(device_t dev)
{
int error;
error = bus_generic_detach(dev);
if (error) {
device_printf(dev, "bus detach failed\n");
return (error);
}
intsmb_release_resources(dev);
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 = SMB_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 (!sc->poll && !cold && !nointr)
tmp |= PIIX4_SMBHSTCNT_INTREN;
bus_write_1(sc->io_res, PIIX4_SMBHSTCNT, tmp);
}
static int
intsmb_error(device_t dev, 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;
if (error != 0 && bootverbose)
device_printf(dev, "error = %d, status = %#x\n", error, status);
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(sc->dev, status);
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 (sc->poll || cold)
/* So that it can use device during device probe on SMBus. */
return (intsmb_stop_poll(sc));
error = msleep(sc, &sc->lock, 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(sc->dev, 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 suppressed 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 (SMB_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);
}
static int
intsmb_pcall(device_t dev, u_char slave, char cmd, short sdata, short *rdata)
{
return (SMB_ENOTSUPP);
}
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;
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);
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) {
*count = nread;
for (i = 0; i < nread; i++)
data = bus_read_1(sc->io_res, PIIX4_SMBBLKDAT);
} else
error = SMB_EBUSERR;
}
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),
/* 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),
DEVMETHOD_END
};
static driver_t intsmb_driver = {
"intsmb",
intsmb_methods,
sizeof(struct intsmb_softc),
};
DRIVER_MODULE_ORDERED(intsmb, pci, intsmb_driver, intsmb_devclass, 0, 0,
SI_ORDER_ANY);
DRIVER_MODULE(smbus, intsmb, smbus_driver, smbus_devclass, 0, 0);
MODULE_DEPEND(intsmb, smbus, SMBUS_MINVER, SMBUS_PREFVER, SMBUS_MAXVER);
MODULE_VERSION(intsmb, 1);
MODULE_PNP_INFO("W32:vendor/device;D:#", pci, intpm, intsmb_products,
nitems(intsmb_products));
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