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/* $OpenBSD: if_bwi_pci.c,v 1.18 2022/03/11 18:00:45 mpi Exp $ */
/*
* Copyright (c) 2007 Marcus Glocker <mglocker@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/*
* PCI front-end for the Broadcom AirForce
*/
#include "bpfilter.h"
#include <sys/param.h>
#include <sys/sockio.h>
#include <sys/mbuf.h>
#include <sys/kernel.h>
#include <sys/socket.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/timeout.h>
#include <sys/device.h>
#include <machine/bus.h>
#include <net/if.h>
#include <net/if_media.h>
#include <netinet/in.h>
#include <netinet/if_ether.h>
#include <net80211/ieee80211_var.h>
#include <net80211/ieee80211_amrr.h>
#include <net80211/ieee80211_radiotap.h>
#include <dev/ic/bwivar.h>
#include <dev/ic/bwireg.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcidevs.h>
/* Base Address Register */
#define BWI_PCI_BAR0 0x10
int bwi_pci_match(struct device *, void *, void *);
void bwi_pci_attach(struct device *, struct device *, void *);
int bwi_pci_detach(struct device *, int);
void bwi_pci_conf_write(void *, uint32_t, uint32_t);
uint32_t bwi_pci_conf_read(void *, uint32_t);
int bwi_pci_activate(struct device *, int);
void bwi_pci_wakeup(struct bwi_softc *);
struct bwi_pci_softc {
struct bwi_softc psc_bwi;
pci_chipset_tag_t psc_pc;
pcitag_t psc_pcitag;
void *psc_ih;
bus_size_t psc_mapsize;
};
const struct cfattach bwi_pci_ca = {
sizeof(struct bwi_pci_softc), bwi_pci_match, bwi_pci_attach,
bwi_pci_detach, bwi_pci_activate
};
const struct pci_matchid bwi_pci_devices[] = {
{ PCI_VENDOR_BROADCOM, PCI_PRODUCT_BROADCOM_BCM4303 },
{ PCI_VENDOR_BROADCOM, PCI_PRODUCT_BROADCOM_BCM4306 },
{ PCI_VENDOR_BROADCOM, PCI_PRODUCT_BROADCOM_BCM4306_2 },
{ PCI_VENDOR_BROADCOM, PCI_PRODUCT_BROADCOM_BCM4307 },
{ PCI_VENDOR_BROADCOM, PCI_PRODUCT_BROADCOM_BCM4309 },
{ PCI_VENDOR_BROADCOM, PCI_PRODUCT_BROADCOM_BCM4311 },
{ PCI_VENDOR_BROADCOM, PCI_PRODUCT_BROADCOM_BCM4312 },
{ PCI_VENDOR_BROADCOM, PCI_PRODUCT_BROADCOM_BCM4318 },
{ PCI_VENDOR_BROADCOM, PCI_PRODUCT_BROADCOM_BCM4319 },
{ PCI_VENDOR_BROADCOM, PCI_PRODUCT_BROADCOM_BCM43XG },
{ PCI_VENDOR_BROADCOM, PCI_PRODUCT_BROADCOM_BCM4331 },
};
int
bwi_pci_match(struct device *parent, void *match, void *aux)
{
struct pci_attach_args *pa = aux;
/*
* The second revision of the BCM4311/BCM4312
* chips require v4 firmware.
*/
if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_BROADCOM &&
(PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_BROADCOM_BCM4311 ||
PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_BROADCOM_BCM4312) &&
PCI_REVISION(pa->pa_class) == 0x02)
return (0);
return (pci_matchbyid((struct pci_attach_args *)aux, bwi_pci_devices,
sizeof(bwi_pci_devices) / sizeof(bwi_pci_devices[0])));
}
void
bwi_reset_bcm4331(struct bwi_softc *sc)
{
int i;
/*
* The BCM4331 is not actually supported by this driver, but buggy EFI
* revisions in 2011-2012 Macs leave this chip enabled by default,
* causing it to emit spurious interrupts when the shared interrupt
* line is enabled.
*/
for (i = 0; CSR_READ_4(sc, BWI_RESET_STATUS) && i < 30; i++)
delay(10);
CSR_WRITE_4(sc, BWI_RESET_CTRL, BWI_RESET_CTRL_RESET);
CSR_READ_4(sc, BWI_RESET_CTRL);
delay(1);
CSR_WRITE_4(sc, BWI_RESET_CTRL, 0);
CSR_READ_4(sc, BWI_RESET_CTRL);
delay(10);
}
void
bwi_pci_attach(struct device *parent, struct device *self, void *aux)
{
struct bwi_pci_softc *psc = (struct bwi_pci_softc *)self;
struct pci_attach_args *pa = aux;
struct bwi_softc *sc = &psc->psc_bwi;
const char *intrstr = NULL;
pci_intr_handle_t ih;
pcireg_t memtype, reg;
sc->sc_dmat = pa->pa_dmat;
psc->psc_pc = pa->pa_pc;
psc->psc_pcitag = pa->pa_tag;
/* map control / status registers */
memtype = pci_mapreg_type(pa->pa_pc, pa->pa_tag, BWI_PCI_BAR0);
if (pci_mapreg_map(pa, BWI_PCI_BAR0, memtype, 0, &sc->sc_mem_bt,
&sc->sc_mem_bh, NULL, &psc->psc_mapsize, 0)) {
printf(": can't map mem space\n");
return;
}
/* we need to access PCI config space from the driver */
sc->sc_conf_write = bwi_pci_conf_write;
sc->sc_conf_read = bwi_pci_conf_read;
reg = pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_SUBSYS_ID_REG);
sc->sc_pci_revid = PCI_REVISION(pa->pa_class);
sc->sc_pci_did = PCI_PRODUCT(pa->pa_id);
sc->sc_pci_subvid = PCI_VENDOR(reg);
sc->sc_pci_subdid = PCI_PRODUCT(reg);
if (sc->sc_pci_did == PCI_PRODUCT_BROADCOM_BCM4331) {
printf(": disabling\n");
bwi_reset_bcm4331(sc);
bus_space_unmap(sc->sc_mem_bt, sc->sc_mem_bh, psc->psc_mapsize);
return;
}
/* map interrupt */
if (pci_intr_map(pa, &ih) != 0) {
printf(": can't map interrupt\n");
return;
}
/* establish interrupt */
intrstr = pci_intr_string(psc->psc_pc, ih);
psc->psc_ih = pci_intr_establish(psc->psc_pc, ih, IPL_NET, bwi_intr, sc,
sc->sc_dev.dv_xname);
if (psc->psc_ih == NULL) {
printf(": can't establish interrupt");
if (intrstr != NULL)
printf(" at %s", intrstr);
printf("\n");
return;
}
printf(": %s", intrstr);
bwi_attach(sc);
}
int
bwi_pci_detach(struct device *self, int flags)
{
struct bwi_pci_softc *psc = (struct bwi_pci_softc *)self;
struct bwi_softc *sc = &psc->psc_bwi;
bwi_detach(sc);
pci_intr_disestablish(psc->psc_pc, psc->psc_ih);
return (0);
}
int
bwi_pci_activate(struct device *self, int act)
{
struct bwi_pci_softc *psc = (struct bwi_pci_softc *)self;
struct bwi_softc *sc = &psc->psc_bwi;
struct ifnet *ifp = &sc->sc_ic.ic_if;
switch (act) {
case DVACT_SUSPEND:
if (ifp->if_flags & IFF_RUNNING)
bwi_stop(sc, 1);
break;
case DVACT_WAKEUP:
bwi_pci_wakeup(sc);
break;
}
return (0);
}
void
bwi_pci_wakeup(struct bwi_softc *sc)
{
struct ifnet *ifp = &sc->sc_ic.ic_if;
if (ifp->if_flags & IFF_UP)
bwi_init(ifp);
}
void
bwi_pci_conf_write(void *self, uint32_t reg, uint32_t val)
{
struct bwi_pci_softc *psc = (struct bwi_pci_softc *)self;
pci_conf_write(psc->psc_pc, psc->psc_pcitag, reg, val);
}
uint32_t
bwi_pci_conf_read(void *self, uint32_t reg)
{
struct bwi_pci_softc *psc = (struct bwi_pci_softc *)self;
return (pci_conf_read(psc->psc_pc, psc->psc_pcitag, reg));
}
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