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/*
* ichsmb_pci.c
*
* Copyright (c) 2000 Whistle Communications, Inc.
* All rights reserved.
*
* Subject to the following obligations and disclaimer of warranty, use and
* redistribution of this software, in source or object code forms, with or
* without modifications are expressly permitted by Whistle Communications;
* provided, however, that:
* 1. Any and all reproductions of the source or object code must include the
* copyright notice above and the following disclaimer of warranties; and
* 2. No rights are granted, in any manner or form, to use Whistle
* Communications, Inc. trademarks, including the mark "WHISTLE
* COMMUNICATIONS" on advertising, endorsements, or otherwise except as
* such appears in the above copyright notice or in the software.
*
* THIS SOFTWARE IS BEING PROVIDED BY WHISTLE COMMUNICATIONS "AS IS", AND
* TO THE MAXIMUM EXTENT PERMITTED BY LAW, WHISTLE COMMUNICATIONS MAKES NO
* REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING THIS SOFTWARE,
* INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT.
* WHISTLE COMMUNICATIONS DOES NOT WARRANT, GUARANTEE, OR MAKE ANY
* REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS OF THE USE OF THIS
* SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE.
* IN NO EVENT SHALL WHISTLE COMMUNICATIONS BE LIABLE FOR ANY DAMAGES
* RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING
* WITHOUT LIMITATION, ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
* PUNITIVE, OR CONSEQUENTIAL DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES, LOSS OF USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER 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 WHISTLE COMMUNICATIONS IS ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* Author: Archie Cobbs <archie@freebsd.org>
*
* $FreeBSD$
*/
/*
* Support for the SMBus controller logical device which is part of the
* Intel 81801AA/AB/BA/CA/DC (ICH/ICH[0234]) I/O controller hub chips.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/errno.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/syslog.h>
#include <sys/bus.h>
#include <machine/bus.h>
#include <sys/rman.h>
#include <machine/resource.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcireg.h>
#include <dev/smbus/smbconf.h>
#include <dev/ichsmb/ichsmb_var.h>
#include <dev/ichsmb/ichsmb_reg.h>
/* PCI unique identifiers */
#define ID_82801AA 0x24138086
#define ID_82801AB 0x24238086
#define ID_82801BA 0x24438086
#define ID_82801CA 0x24838086
#define ID_82801DC 0x24C38086
#define PCIS_SERIALBUS_SMBUS_PROGIF 0x00
/* Internal functions */
static int ichsmb_pci_probe(device_t dev);
static int ichsmb_pci_attach(device_t dev);
/* Device methods */
static device_method_t ichsmb_pci_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, ichsmb_pci_probe),
DEVMETHOD(device_attach, ichsmb_pci_attach),
/* Bus methods */
DEVMETHOD(bus_print_child, bus_generic_print_child),
/* SMBus methods */
DEVMETHOD(smbus_callback, ichsmb_callback),
DEVMETHOD(smbus_quick, ichsmb_quick),
DEVMETHOD(smbus_sendb, ichsmb_sendb),
DEVMETHOD(smbus_recvb, ichsmb_recvb),
DEVMETHOD(smbus_writeb, ichsmb_writeb),
DEVMETHOD(smbus_writew, ichsmb_writew),
DEVMETHOD(smbus_readb, ichsmb_readb),
DEVMETHOD(smbus_readw, ichsmb_readw),
DEVMETHOD(smbus_pcall, ichsmb_pcall),
DEVMETHOD(smbus_bwrite, ichsmb_bwrite),
DEVMETHOD(smbus_bread, ichsmb_bread),
{ 0, 0 }
};
static driver_t ichsmb_pci_driver = {
"ichsmb",
ichsmb_pci_methods,
sizeof(struct ichsmb_softc)
};
static devclass_t ichsmb_pci_devclass;
DRIVER_MODULE(ichsmb, pci, ichsmb_pci_driver, ichsmb_pci_devclass, 0, 0);
static int
ichsmb_pci_probe(device_t dev)
{
/* Check PCI identifier */
switch (pci_get_devid(dev)) {
case ID_82801AA:
device_set_desc(dev, "Intel 82801AA (ICH) SMBus controller");
break;
case ID_82801AB:
device_set_desc(dev, "Intel 82801AB (ICH0) SMBus controller");
break;
case ID_82801BA:
device_set_desc(dev, "Intel 82801BA (ICH2) SMBus controller");
break;
case ID_82801CA:
device_set_desc(dev, "Intel 82801CA (ICH3) SMBus controller");
break;
case ID_82801DC:
device_set_desc(dev, "Intel 82801DC (ICH4) SMBus controller");
break;
default:
if (pci_get_class(dev) == PCIC_SERIALBUS
&& pci_get_subclass(dev) == PCIS_SERIALBUS_SMBUS
&& pci_get_progif(dev) == PCIS_SERIALBUS_SMBUS_PROGIF) {
device_set_desc(dev, "SMBus controller");
return (-2); /* XXX */
}
return (ENXIO);
}
/* Done */
return (ichsmb_probe(dev));
}
static int
ichsmb_pci_attach(device_t dev)
{
const sc_p sc = device_get_softc(dev);
u_int32_t cmd;
int error;
/* Initialize private state */
bzero(sc, sizeof(*sc));
sc->ich_cmd = -1;
sc->dev = dev;
/* Allocate an I/O range */
sc->io_rid = ICH_SMB_BASE;
sc->io_res = bus_alloc_resource(dev, SYS_RES_IOPORT,
&sc->io_rid, 0, ~0, 16, RF_ACTIVE);
if (sc->io_res == NULL) {
log(LOG_ERR, "%s: can't map I/O\n", device_get_nameunit(dev));
error = ENXIO;
goto fail;
}
sc->io_bst = rman_get_bustag(sc->io_res);
sc->io_bsh = rman_get_bushandle(sc->io_res);
/* Allocate interrupt */
sc->irq_rid = 0;
sc->irq_res = bus_alloc_resource(dev, SYS_RES_IRQ,
&sc->irq_rid, 0, ~0, 1, RF_ACTIVE | RF_SHAREABLE);
if (sc->irq_res == NULL) {
log(LOG_ERR, "%s: can't get IRQ\n", device_get_nameunit(dev));
error = ENXIO;
goto fail;
}
/* Set up interrupt handler */
error = bus_setup_intr(dev, sc->irq_res, INTR_TYPE_MISC,
ichsmb_device_intr, sc, &sc->irq_handle);
if (error != 0) {
log(LOG_ERR, "%s: can't setup irq\n", device_get_nameunit(dev));
goto fail;
}
/* Enable I/O mapping */
cmd = pci_read_config(dev, PCIR_COMMAND, 4);
cmd |= PCIM_CMD_PORTEN;
pci_write_config(dev, PCIR_COMMAND, cmd, 4);
cmd = pci_read_config(dev, PCIR_COMMAND, 4);
if ((cmd & PCIM_CMD_PORTEN) == 0) {
log(LOG_ERR, "%s: can't enable memory map\n",
device_get_nameunit(dev));
error = ENXIO;
goto fail;
}
/* Enable device */
pci_write_config(dev, ICH_HOSTC, ICH_HOSTC_HST_EN, 1);
/* Done */
return (ichsmb_attach(dev));
fail:
/* Attach failed, release resources */
ichsmb_release_resources(sc);
return (error);
}
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