FreeBSD-5.3/sys/dev/ath/if_ath_pci.c
/*-
* Copyright (c) 2002-2004 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.
* 3. Neither the names of the above-listed copyright holders nor the names
* of any contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* 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: src/sys/dev/ath/if_ath_pci.c,v 1.8 2004/04/02 23:57:10 sam Exp $");
/*
* PCI/Cardbus front-end for the Atheros Wireless LAN controller driver.
*/
#include "opt_inet.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/mbuf.h>
#include <sys/malloc.h>
#include <sys/module.h>
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/socket.h>
#include <sys/sockio.h>
#include <sys/errno.h>
#include <machine/bus.h>
#include <machine/resource.h>
#include <sys/bus.h>
#include <sys/rman.h>
#include <net/if.h>
#include <net/if_dl.h>
#include <net/if_media.h>
#include <net/ethernet.h>
#include <net/if_llc.h>
#include <net/if_arp.h>
#include <net80211/ieee80211.h>
#include <net80211/ieee80211_crypto.h>
#include <net80211/ieee80211_node.h>
#include <net80211/ieee80211_proto.h>
#include <net80211/ieee80211_var.h>
#ifdef INET
#include <netinet/in.h>
#include <netinet/if_ether.h>
#endif
#include <dev/ath/if_athvar.h>
#include <contrib/dev/ath/ah.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcireg.h>
/*
* PCI glue.
*/
struct ath_pci_softc {
struct ath_softc sc_sc;
struct resource *sc_sr; /* memory resource */
struct resource *sc_irq; /* irq resource */
void *sc_ih; /* intererupt handler */
u_int8_t sc_saved_intline;
u_int8_t sc_saved_cachelinesz;
u_int8_t sc_saved_lattimer;
};
#define BS_BAR 0x10
static int
ath_pci_probe(device_t dev)
{
const char* devname;
devname = ath_hal_probe(pci_get_vendor(dev), pci_get_device(dev));
if (devname) {
device_set_desc(dev, devname);
return 0;
}
return ENXIO;
}
static int
ath_pci_attach(device_t dev)
{
struct ath_pci_softc *psc = device_get_softc(dev);
struct ath_softc *sc = &psc->sc_sc;
u_int32_t cmd;
int error = ENXIO;
int rid;
bzero(psc, sizeof (*psc));
sc->sc_dev = dev;
cmd = pci_read_config(dev, PCIR_COMMAND, 4);
cmd |= PCIM_CMD_MEMEN | PCIM_CMD_BUSMASTEREN;
pci_write_config(dev, PCIR_COMMAND, cmd, 4);
cmd = pci_read_config(dev, PCIR_COMMAND, 4);
if ((cmd & PCIM_CMD_MEMEN) == 0) {
device_printf(dev, "failed to enable memory mapping\n");
goto bad;
}
if ((cmd & PCIM_CMD_BUSMASTEREN) == 0) {
device_printf(dev, "failed to enable bus mastering\n");
goto bad;
}
/*
* Setup memory-mapping of PCI registers.
*/
rid = BS_BAR;
psc->sc_sr = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
RF_ACTIVE);
if (psc->sc_sr == NULL) {
device_printf(dev, "cannot map register space\n");
goto bad;
}
sc->sc_st = rman_get_bustag(psc->sc_sr);
sc->sc_sh = rman_get_bushandle(psc->sc_sr);
/*
* Mark device invalid so any interrupts (shared or otherwise)
* that arrive before the HAL is setup are discarded.
*/
sc->sc_invalid = 1;
/*
* Arrange interrupt line.
*/
rid = 0;
psc->sc_irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
RF_SHAREABLE|RF_ACTIVE);
if (psc->sc_irq == NULL) {
device_printf(dev, "could not map interrupt\n");
goto bad1;
}
if (bus_setup_intr(dev, psc->sc_irq,
INTR_TYPE_NET | INTR_MPSAFE,
ath_intr, sc, &psc->sc_ih)) {
device_printf(dev, "could not establish interrupt\n");
goto bad2;
}
/*
* Setup DMA descriptor area.
*/
if (bus_dma_tag_create(NULL, /* parent */
1, 0, /* alignment, bounds */
BUS_SPACE_MAXADDR_32BIT, /* lowaddr */
BUS_SPACE_MAXADDR, /* highaddr */
NULL, NULL, /* filter, filterarg */
0x3ffff, /* maxsize XXX */
ATH_MAX_SCATTER, /* nsegments */
0xffff, /* maxsegsize XXX */
BUS_DMA_ALLOCNOW, /* flags */
NULL, /* lockfunc */
NULL, /* lockarg */
&sc->sc_dmat)) {
device_printf(dev, "cannot allocate DMA tag\n");
goto bad3;
}
ATH_LOCK_INIT(sc);
error = ath_attach(pci_get_device(dev), sc);
if (error == 0)
return error;
ATH_LOCK_DESTROY(sc);
bus_dma_tag_destroy(sc->sc_dmat);
bad3:
bus_teardown_intr(dev, psc->sc_irq, psc->sc_ih);
bad2:
bus_release_resource(dev, SYS_RES_IRQ, 0, psc->sc_irq);
bad1:
bus_release_resource(dev, SYS_RES_MEMORY, BS_BAR, psc->sc_sr);
bad:
return (error);
}
static int
ath_pci_detach(device_t dev)
{
struct ath_pci_softc *psc = device_get_softc(dev);
struct ath_softc *sc = &psc->sc_sc;
/* check if device was removed */
sc->sc_invalid = !bus_child_present(dev);
ath_detach(sc);
bus_generic_detach(dev);
bus_teardown_intr(dev, psc->sc_irq, psc->sc_ih);
bus_release_resource(dev, SYS_RES_IRQ, 0, psc->sc_irq);
bus_dma_tag_destroy(sc->sc_dmat);
bus_release_resource(dev, SYS_RES_MEMORY, BS_BAR, psc->sc_sr);
ATH_LOCK_DESTROY(sc);
return (0);
}
static int
ath_pci_shutdown(device_t dev)
{
struct ath_pci_softc *psc = device_get_softc(dev);
ath_shutdown(&psc->sc_sc);
return (0);
}
static int
ath_pci_suspend(device_t dev)
{
struct ath_pci_softc *psc = device_get_softc(dev);
ath_suspend(&psc->sc_sc);
psc->sc_saved_intline = pci_read_config(dev, PCIR_INTLINE, 1);
psc->sc_saved_cachelinesz= pci_read_config(dev, PCIR_CACHELNSZ, 1);
psc->sc_saved_lattimer = pci_read_config(dev, PCIR_LATTIMER, 1);
return (0);
}
static int
ath_pci_resume(device_t dev)
{
struct ath_pci_softc *psc = device_get_softc(dev);
u_int16_t cmd;
pci_write_config(dev, PCIR_INTLINE, psc->sc_saved_intline, 1);
pci_write_config(dev, PCIR_CACHELNSZ, psc->sc_saved_cachelinesz, 1);
pci_write_config(dev, PCIR_LATTIMER, psc->sc_saved_lattimer, 1);
/* re-enable mem-map and busmastering */
cmd = pci_read_config(dev, PCIR_COMMAND, 2);
cmd |= PCIM_CMD_MEMEN | PCIM_CMD_BUSMASTEREN;
pci_write_config(dev, PCIR_COMMAND, cmd, 2);
ath_resume(&psc->sc_sc);
return (0);
}
static device_method_t ath_pci_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, ath_pci_probe),
DEVMETHOD(device_attach, ath_pci_attach),
DEVMETHOD(device_detach, ath_pci_detach),
DEVMETHOD(device_shutdown, ath_pci_shutdown),
DEVMETHOD(device_suspend, ath_pci_suspend),
DEVMETHOD(device_resume, ath_pci_resume),
{ 0,0 }
};
static driver_t ath_pci_driver = {
"ath",
ath_pci_methods,
sizeof (struct ath_pci_softc)
};
static devclass_t ath_devclass;
DRIVER_MODULE(if_ath, pci, ath_pci_driver, ath_devclass, 0, 0);
DRIVER_MODULE(if_ath, cardbus, ath_pci_driver, ath_devclass, 0, 0);
MODULE_VERSION(if_ath, 1);
MODULE_DEPEND(if_ath, ath_hal, 1, 1, 1); /* Atheros HAL */
MODULE_DEPEND(if_ath, wlan, 1, 1, 1); /* 802.11 media layer */