freebsd-dev/sys/dev/bwi/if_bwi_pci.c
Weongyo Jeong e7c6c10e16 Fixes a page fault in bwi_pci_probe() because the array isn't terminated
with NULL.

PR:		kern/148473
Submitted by:	Grzegorz Dabrowski <grzegorz.dabrowski at gmail dot com>
MFC after:	1 week
2010-07-10 22:37:23 +00:00

255 lines
6.9 KiB
C

/*-
* Copyright (c) 2002-2007 Sam Leffler, Errno Consulting
* 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,
* without modification.
* 2. Redistributions in binary form must reproduce at minimum a disclaimer
* similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
* redistribution must be conditioned upon including a substantially
* similar Disclaimer requirement for further binary redistribution.
*
* NO WARRANTY
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
* THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR 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 DAMAGES.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
/*
* PCI/Cardbus front-end for the Broadcom Wireless LAN controller driver.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/module.h>
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/errno.h>
#include <machine/bus.h>
#include <machine/resource.h>
#include <sys/bus.h>
#include <sys/rman.h>
#include <sys/socket.h>
#include <net/if.h>
#include <net/if_media.h>
#include <net/if_arp.h>
#include <net80211/ieee80211_var.h>
#include <net80211/ieee80211_radiotap.h>
#include <net80211/ieee80211_amrr.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcireg.h>
#include <dev/bwi/if_bwivar.h>
#include <dev/bwi/if_bwireg.h>
#include <dev/bwi/bitops.h>
/*
* PCI glue.
*/
struct bwi_pci_softc {
struct bwi_softc sc_sc;
};
#define BS_BAR 0x10
#define PCIR_RETRY_TIMEOUT 0x41
static const struct bwi_dev {
uint16_t vid;
uint16_t did;
const char *desc;
} bwi_devices[] = {
{ PCI_VENDOR_BROADCOM, 0x4301,"Broadcom BCM4301 802.11b Wireless Lan" },
{ PCI_VENDOR_BROADCOM, 0x4307,"Broadcom BCM4307 802.11b Wireless Lan" },
{ PCI_VENDOR_BROADCOM, 0x4311,"Broadcom BCM4311 802.11b/g Wireless Lan" },
{ PCI_VENDOR_BROADCOM, 0x4312,"Broadcom BCM4312 802.11a/b/g Wireless Lan" },
{ PCI_VENDOR_BROADCOM, 0x4313,"Broadcom BCM4312 802.11a Wireless Lan" },
{ PCI_VENDOR_BROADCOM, 0x4320,"Broadcom BCM4306 802.11b/g Wireless Lan"},
{ PCI_VENDOR_BROADCOM, 0x4321,"Broadcom BCM4306 802.11a Wireless Lan"},
{ PCI_VENDOR_BROADCOM, 0x4325,"Broadcom BCM4306 802.11b/g Wireless Lan"},
{ PCI_VENDOR_BROADCOM, 0x4324,"Broadcom BCM4309 802.11a/b/g Wireless Lan" },
{ PCI_VENDOR_BROADCOM, 0x4318,"Broadcom BCM4318 802.11b/g Wireless Lan" },
{ PCI_VENDOR_BROADCOM, 0x4319,"Broadcom BCM4318 802.11a/b/g Wireless Lan" },
{ PCI_VENDOR_BROADCOM, 0x431a,"Broadcom BCM4318 802.11a Wireless Lan" },
{ 0, 0, NULL }
};
static int
bwi_pci_probe(device_t dev)
{
const struct bwi_dev *b;
uint16_t did, vid;
did = pci_get_device(dev);
vid = pci_get_vendor(dev);
for (b = bwi_devices; b->desc != NULL; ++b) {
if (b->did == did && b->vid == vid) {
device_set_desc(dev, b->desc);
return BUS_PROBE_DEFAULT;
}
}
return ENXIO;
}
static int
bwi_pci_attach(device_t dev)
{
struct bwi_pci_softc *psc = device_get_softc(dev);
struct bwi_softc *sc = &psc->sc_sc;
int error = ENXIO;
sc->sc_dev = dev;
/*
* Enable bus mastering.
*/
pci_enable_busmaster(dev);
/*
* Setup memory-mapping of PCI registers.
*/
sc->sc_mem_rid = BWI_PCIR_BAR;
sc->sc_mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
&sc->sc_mem_rid, RF_ACTIVE);
if (sc->sc_mem_res == NULL) {
device_printf(dev, "cannot map register space\n");
goto bad;
}
sc->sc_mem_bt = rman_get_bustag(sc->sc_mem_res);
sc->sc_mem_bh = rman_get_bushandle(sc->sc_mem_res);
/*
* Mark device invalid so any interrupts (shared or otherwise)
* that arrive before the card is setup are discarded.
*/
sc->sc_invalid = 1;
/*
* Arrange interrupt line.
*/
sc->sc_irq_rid = 0;
sc->sc_irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ,
&sc->sc_irq_rid,
RF_SHAREABLE|RF_ACTIVE);
if (sc->sc_irq_res == NULL) {
device_printf(dev, "could not map interrupt\n");
goto bad1;
}
if (bus_setup_intr(dev, sc->sc_irq_res,
INTR_TYPE_NET | INTR_MPSAFE,
NULL, bwi_intr, sc, &sc->sc_irq_handle)) {
device_printf(dev, "could not establish interrupt\n");
goto bad2;
}
/* Get more PCI information */
sc->sc_pci_did = pci_get_device(dev);
sc->sc_pci_revid = pci_get_revid(dev);
sc->sc_pci_subvid = pci_get_subvendor(dev);
sc->sc_pci_subdid = pci_get_subdevice(dev);
error = bwi_attach(sc);
if (error == 0) /* success */
return 0;
bus_teardown_intr(dev, sc->sc_irq_res, sc->sc_irq_handle);
bad2:
bus_release_resource(dev, SYS_RES_IRQ, 0, sc->sc_irq_res);
bad1:
bus_release_resource(dev, SYS_RES_MEMORY, BS_BAR, sc->sc_mem_res);
bad:
return (error);
}
static int
bwi_pci_detach(device_t dev)
{
struct bwi_pci_softc *psc = device_get_softc(dev);
struct bwi_softc *sc = &psc->sc_sc;
/* check if device was removed */
sc->sc_invalid = !bus_child_present(dev);
bwi_detach(sc);
bus_generic_detach(dev);
bus_teardown_intr(dev, sc->sc_irq_res, sc->sc_irq_handle);
bus_release_resource(dev, SYS_RES_IRQ, 0, sc->sc_irq_res);
bus_release_resource(dev, SYS_RES_MEMORY, BS_BAR, sc->sc_mem_res);
return (0);
}
static int
bwi_pci_shutdown(device_t dev)
{
struct bwi_pci_softc *psc = device_get_softc(dev);
bwi_shutdown(&psc->sc_sc);
return (0);
}
static int
bwi_pci_suspend(device_t dev)
{
struct bwi_pci_softc *psc = device_get_softc(dev);
bwi_suspend(&psc->sc_sc);
return (0);
}
static int
bwi_pci_resume(device_t dev)
{
struct bwi_pci_softc *psc = device_get_softc(dev);
bwi_resume(&psc->sc_sc);
return (0);
}
static device_method_t bwi_pci_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, bwi_pci_probe),
DEVMETHOD(device_attach, bwi_pci_attach),
DEVMETHOD(device_detach, bwi_pci_detach),
DEVMETHOD(device_shutdown, bwi_pci_shutdown),
DEVMETHOD(device_suspend, bwi_pci_suspend),
DEVMETHOD(device_resume, bwi_pci_resume),
{ 0,0 }
};
static driver_t bwi_driver = {
"bwi",
bwi_pci_methods,
sizeof (struct bwi_pci_softc)
};
static devclass_t bwi_devclass;
DRIVER_MODULE(bwi, pci, bwi_driver, bwi_devclass, 0, 0);
MODULE_DEPEND(bwi, wlan, 1, 1, 1); /* 802.11 media layer */
MODULE_DEPEND(bwi, firmware, 1, 1, 1); /* firmware support */
MODULE_DEPEND(bwi, wlan_amrr, 1, 1, 1);