/* $NetBSD: geode.c,v 1.17 2021/08/07 16:18:55 thorpej Exp $ */
/*-
* Copyright (c) 2005 David Young. All rights reserved.
*
* This code was written by David Young and merged with geodecntr code
* by Frank Kardel.
*
* 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 DAVID YOUNG ``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 DAVID
* YOUNG 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.
*/
/*-
* Copyright (c) 2002 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jason R. Thorpe.
*
* 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/
/*
* Device driver for the special devices attached to the GBA (watchdog, high
* resolution counter, ...) in the AMD Geode SC1100 processor.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: geode.c,v 1.17 2021/08/07 16:18:55 thorpej Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/wdog.h>
#include <uvm/uvm_extern.h>
#include <sys/bus.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcidevs.h>
#include <arch/i386/pci/geodevar.h>
#include <arch/i386/pci/geodereg.h>
#include <dev/sysmon/sysmonvar.h>
#ifdef GEODE_DEBUG
#define GEODE_DPRINTF(__x) printf __x
#else /* GEODE_DEBUG */
#define GEODE_DPRINTF(__x) /* nothing */
#endif
static int
geode_gcb_match(device_t parent, cfdata_t match, void *aux)
{
struct pci_attach_args *pa = aux;
if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_NS &&
PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_NS_SC1100_XBUS)
return (10); /* XXX beat pchb? -dyoung */
return (0);
}
static void
geode_gcb_attach(device_t parent, device_t self, void *aux)
{
struct geode_gcb_softc *sc = device_private(self);
struct pci_attach_args *pa = aux;
uint32_t cba;
u_int rev;
cba = pci_conf_read(pa->pa_pc, pa->pa_tag, SC1100_XBUS_CBA_SCRATCHPAD);
sc->sc_iot = pa->pa_iot;
if (bus_space_map(sc->sc_iot, (bus_addr_t)cba, SC1100_GCB_SIZE, 0,
&sc->sc_ioh) != 0) {
aprint_error(": unable to map registers\n");
return;
}
GEODE_DPRINTF(("%s: mapped %u bytes at %#08" PRIx32 "\n",
device_xname(self), SC1100_GCB_SIZE, cba));
rev = bus_space_read_1(sc->sc_iot, sc->sc_ioh, SC1100_GCB_REV_B);
aprint_naive("\n");
aprint_normal(": AMD Geode GCB (rev. 0x%02x)\n", rev);
while (config_found(self, NULL, NULL, CFARGS_NONE) != NULL)
/* empty */;
}
static int
geode_gcb_detach(device_t self, int flags)
{
int rc;
struct geode_gcb_softc *sc = device_private(self);
if ((rc = config_detach_children(self, flags)) != 0)
return rc;
bus_space_unmap(sc->sc_iot, sc->sc_ioh, SC1100_GCB_SIZE);
return 0;
}
static void
geode_gcb_childdetached(device_t parent, device_t child)
{
/* We hold no references to child devices, so there is nothing
* to do.
*/
}
CFATTACH_DECL2_NEW(geodegcb, sizeof(struct geode_gcb_softc),
geode_gcb_match, geode_gcb_attach, geode_gcb_detach, NULL, NULL,
geode_gcb_childdetached);
