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freebsd/sys/dev/mwl/if_mwl_pci.c
Rui Paulo bcda02c3e4 Don't use BUS_DMA_ALLOCNOW as that causes the attachment to fail on 
Cambria boards.

MFC after:	2 months
2009-10-22 12:48:17 +00:00

317 lines
7.9 KiB
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/*-
* Copyright (c) 2007-2009 Sam Leffler, Errno Consulting
* Copyright (c) 2007-2009 Marvell Semiconductor, Inc.
* 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>
#ifdef __FreeBSD__
__FBSDID("$FreeBSD$");
#endif
/*
* PCI front-end for the Marvell 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 <dev/mwl/if_mwlvar.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcireg.h>
/*
* PCI glue.
*/
struct mwl_pci_softc {
struct mwl_softc sc_sc;
struct resource *sc_sr0; /* BAR0 memory resource */
struct resource *sc_sr1; /* BAR1 memory resource */
struct resource *sc_irq; /* irq resource */
void *sc_ih; /* interrupt handler */
};
#define BS_BAR0 0x10
#define BS_BAR1 0x14
struct mwl_pci_ident {
uint16_t vendor;
uint16_t device;
const char *name;
};
static const struct mwl_pci_ident mwl_pci_ids[] = {
{ 0x11ab, 0x2a02, "Marvell 88W8363" },
{ 0x11ab, 0x2a03, "Marvell 88W8363" },
{ 0x11ab, 0x2a0a, "Marvell 88W8363" },
{ 0x11ab, 0x2a0b, "Marvell 88W8363" },
{ 0x11ab, 0x2a0c, "Marvell 88W8363" },
{ 0x11ab, 0x2a21, "Marvell 88W8363" },
{ 0x11ab, 0x2a24, "Marvell 88W8363" },
{ 0, 0, NULL }
};
const static struct mwl_pci_ident *
mwl_pci_lookup(int vendor, int device)
{
const struct mwl_pci_ident *ident;
for (ident = mwl_pci_ids; ident->name != NULL; ident++)
if (vendor == ident->vendor && device == ident->device)
return ident;
return NULL;
}
static int
mwl_pci_probe(device_t dev)
{
const struct mwl_pci_ident *ident;
ident = mwl_pci_lookup(pci_get_vendor(dev), pci_get_device(dev));
if (ident != NULL) {
device_set_desc(dev, ident->name);
return BUS_PROBE_DEFAULT;
}
return ENXIO;
}
static u_int32_t
mwl_pci_setup(device_t dev)
{
u_int32_t cmd;
/*
* Enable memory mapping and bus mastering.
*/
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");
return 0;
}
if ((cmd & PCIM_CMD_BUSMASTEREN) == 0) {
device_printf(dev, "failed to enable bus mastering\n");
return 0;
}
return 1;
}
static int
mwl_pci_attach(device_t dev)
{
struct mwl_pci_softc *psc = device_get_softc(dev);
struct mwl_softc *sc = &psc->sc_sc;
int rid, error = ENXIO;
sc->sc_dev = dev;
/*
* Enable memory mapping and bus mastering.
*/
if (!mwl_pci_setup(dev))
return 0;
/*
* Setup memory-mapping of PCI registers.
*/
rid = BS_BAR0;
psc->sc_sr0 = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
RF_ACTIVE);
if (psc->sc_sr0 == NULL) {
device_printf(dev, "cannot map BAR0 register space\n");
goto bad;
}
rid = BS_BAR1;
psc->sc_sr1 = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
RF_ACTIVE);
if (psc->sc_sr1 == NULL) {
device_printf(dev, "cannot map BAR1 register space\n");
goto bad1;
}
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 bad2;
}
if (bus_setup_intr(dev, psc->sc_irq,
INTR_TYPE_NET | INTR_MPSAFE,
NULL, mwl_intr, sc, &psc->sc_ih)) {
device_printf(dev, "could not establish interrupt\n");
goto bad3;
}
/*
* Setup DMA descriptor area.
*/
if (bus_dma_tag_create(bus_get_dma_tag(dev), /* parent */
1, 0, /* alignment, bounds */
BUS_SPACE_MAXADDR_32BIT, /* lowaddr */
BUS_SPACE_MAXADDR, /* highaddr */
NULL, NULL, /* filter, filterarg */
BUS_SPACE_MAXADDR, /* maxsize */
MWL_TXDESC, /* nsegments */
BUS_SPACE_MAXADDR, /* maxsegsize */
0, /* flags */
NULL, /* lockfunc */
NULL, /* lockarg */
&sc->sc_dmat)) {
device_printf(dev, "cannot allocate DMA tag\n");
goto bad4;
}
/*
* Finish off the attach.
*/
MWL_LOCK_INIT(sc);
sc->sc_io0t = rman_get_bustag(psc->sc_sr0);
sc->sc_io0h = rman_get_bushandle(psc->sc_sr0);
sc->sc_io1t = rman_get_bustag(psc->sc_sr1);
sc->sc_io1h = rman_get_bushandle(psc->sc_sr1);
if (mwl_attach(pci_get_device(dev), sc) == 0)
return (0);
MWL_LOCK_DESTROY(sc);
bus_dma_tag_destroy(sc->sc_dmat);
bad4:
bus_teardown_intr(dev, psc->sc_irq, psc->sc_ih);
bad3:
bus_release_resource(dev, SYS_RES_IRQ, 0, psc->sc_irq);
bad2:
bus_release_resource(dev, SYS_RES_MEMORY, BS_BAR1, psc->sc_sr1);
bad1:
bus_release_resource(dev, SYS_RES_MEMORY, BS_BAR0, psc->sc_sr0);
bad:
return (error);
}
static int
mwl_pci_detach(device_t dev)
{
struct mwl_pci_softc *psc = device_get_softc(dev);
struct mwl_softc *sc = &psc->sc_sc;
/* check if device was removed */
sc->sc_invalid = !bus_child_present(dev);
mwl_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_BAR1, psc->sc_sr1);
bus_release_resource(dev, SYS_RES_MEMORY, BS_BAR0, psc->sc_sr0);
MWL_LOCK_DESTROY(sc);
return (0);
}
static int
mwl_pci_shutdown(device_t dev)
{
struct mwl_pci_softc *psc = device_get_softc(dev);
mwl_shutdown(&psc->sc_sc);
return (0);
}
static int
mwl_pci_suspend(device_t dev)
{
struct mwl_pci_softc *psc = device_get_softc(dev);
mwl_suspend(&psc->sc_sc);
return (0);
}
static int
mwl_pci_resume(device_t dev)
{
struct mwl_pci_softc *psc = device_get_softc(dev);
if (!mwl_pci_setup(dev))
return ENXIO;
mwl_resume(&psc->sc_sc);
return (0);
}
static device_method_t mwl_pci_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, mwl_pci_probe),
DEVMETHOD(device_attach, mwl_pci_attach),
DEVMETHOD(device_detach, mwl_pci_detach),
DEVMETHOD(device_shutdown, mwl_pci_shutdown),
DEVMETHOD(device_suspend, mwl_pci_suspend),
DEVMETHOD(device_resume, mwl_pci_resume),
{ 0,0 }
};
static driver_t mwl_pci_driver = {
"mwl",
mwl_pci_methods,
sizeof (struct mwl_pci_softc)
};
static devclass_t mwl_devclass;
DRIVER_MODULE(mwl, pci, mwl_pci_driver, mwl_devclass, 0, 0);
MODULE_VERSION(mwl, 1);
MODULE_DEPEND(mwl, wlan, 1, 1, 1); /* 802.11 media layer */
MODULE_DEPEND(mwl, mwlfw_fw, 1, 1, 1); /* firmware */
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