/*      $NetBSD: wi.c,v 1.258 2023/08/01 07:04:15 mrg Exp $     */

/*-
 * Copyright (c) 2004 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Charles M. Hannum.
 *
 * 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.
 */

/*
 * Copyright (c) 1997, 1998, 1999
 *      Bill Paul <wpaul@ctr.columbia.edu>.  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.
 * 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.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by Bill Paul.
 * 4. Neither the name of the author nor the names of any co-contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY Bill Paul 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 Bill Paul OR THE VOICES IN HIS HEAD
 * 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.
 */

/*
 * Lucent WaveLAN/IEEE 802.11 PCMCIA driver for NetBSD.
 *
 * Original FreeBSD driver written by Bill Paul <wpaul@ctr.columbia.edu>
 * Electrical Engineering Department
 * Columbia University, New York City
 */

/*
 * The WaveLAN/IEEE adapter is the second generation of the WaveLAN
 * from Lucent. Unlike the older cards, the new ones are programmed
 * entirely via a firmware-driven controller called the Hermes.
 * Unfortunately, Lucent will not release the Hermes programming manual
 * without an NDA (if at all). What they do release is an API library
 * called the HCF (Hardware Control Functions) which is supposed to
 * do the device-specific operations of a device driver for you. The
 * publically available version of the HCF library (the 'HCF Light') is
 * a) extremely gross, b) lacks certain features, particularly support
 * for 802.11 frames, and c) is contaminated by the GNU Public License.
 *
 * This driver does not use the HCF or HCF Light at all. Instead, it
 * programs the Hermes controller directly, using information gleaned
 * from the HCF Light code and corresponding documentation.
 *
 * This driver supports both the PCMCIA and ISA versions of the
 * WaveLAN/IEEE cards. Note however that the ISA card isn't really
 * anything of the sort: it's actually a PCMCIA bridge adapter
 * that fits into an ISA slot, into which a PCMCIA WaveLAN card is
 * inserted. Consequently, you need to use the pccard support for
 * both the ISA and PCMCIA adapters.
 */

/*
 * FreeBSD driver ported to NetBSD by Bill Sommerfeld in the back of the
 * Oslo IETF plenary meeting.
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: wi.c,v 1.258 2023/08/01 07:04:15 mrg Exp $");

#define WI_HERMES_AUTOINC_WAR   /* Work around data write autoinc bug. */
#define WI_HERMES_STATS_WAR     /* Work around stats counter bug. */
#undef WI_HISTOGRAM
#undef WI_RING_DEBUG
#define STATIC static


#include <sys/param.h>
#include <sys/sysctl.h>
#include <sys/systm.h>
#include <sys/callout.h>
#include <sys/device.h>
#include <sys/socket.h>
#include <sys/mbuf.h>
#include <sys/ioctl.h>
#include <sys/kernel.h>         /* for hz */
#include <sys/proc.h>
#include <sys/kauth.h>

#include <net/if.h>
#include <net/if_dl.h>
#include <net/if_llc.h>
#include <net/if_media.h>
#include <net/if_ether.h>
#include <net/route.h>
#include <net/bpf.h>

#include <net80211/ieee80211_netbsd.h>
#include <net80211/ieee80211_var.h>
#include <net80211/ieee80211_ioctl.h>
#include <net80211/ieee80211_radiotap.h>
#include <net80211/ieee80211_rssadapt.h>

#include <sys/bus.h>
#include <sys/intr.h>

#include <dev/ic/wi_ieee.h>
#include <dev/ic/wireg.h>
#include <dev/ic/wivar.h>

STATIC int  wi_init(struct ifnet *);
STATIC void wi_stop(struct ifnet *, int);
STATIC void wi_start(struct ifnet *);
STATIC int  wi_reset(struct wi_softc *);
STATIC void wi_watchdog(struct ifnet *);
STATIC int  wi_ioctl(struct ifnet *, u_long, void *);
STATIC int  wi_media_change(struct ifnet *);
STATIC void wi_media_status(struct ifnet *, struct ifmediareq *);
STATIC void wi_softintr(void *);

static void wi_ioctl_init(struct wi_softc *);
static int wi_ioctl_enter(struct wi_softc *);
static void wi_ioctl_exit(struct wi_softc *);
static void wi_ioctl_drain(struct wi_softc *);

STATIC struct ieee80211_node *wi_node_alloc(struct ieee80211_node_table *);
STATIC void wi_node_free(struct ieee80211_node *);

STATIC void wi_raise_rate(struct ieee80211com *, struct ieee80211_rssdesc *);
STATIC void wi_lower_rate(struct ieee80211com *, struct ieee80211_rssdesc *);
STATIC int wi_choose_rate(struct ieee80211com *, struct ieee80211_node *,
    struct ieee80211_frame *, u_int);
STATIC void wi_rssadapt_updatestats_cb(void *, struct ieee80211_node *);
STATIC void wi_rssadapt_updatestats(void *);
STATIC void wi_rssdescs_init(struct wi_rssdesc (*)[WI_NTXRSS], wi_rssdescq_t *);
STATIC void wi_rssdescs_reset(struct ieee80211com *,
    struct wi_rssdesc (*)[WI_NTXRSS], wi_rssdescq_t *,
    uint8_t (*)[IEEE80211_RATE_MAXSIZE]);
STATIC void wi_sync_bssid(struct wi_softc *,
    uint8_t new_bssid[IEEE80211_ADDR_LEN]);

STATIC void wi_rx_intr(struct wi_softc *);
STATIC void wi_txalloc_intr(struct wi_softc *);
STATIC void wi_cmd_intr(struct wi_softc *);
STATIC void wi_tx_intr(struct wi_softc *);
STATIC void wi_tx_ex_intr(struct wi_softc *);
STATIC void wi_info_intr(struct wi_softc *);

STATIC int wi_key_delete(struct ieee80211com *, const struct ieee80211_key *);
STATIC int wi_key_set(struct ieee80211com *, const struct ieee80211_key *,
    const uint8_t[IEEE80211_ADDR_LEN]);
STATIC void wi_key_update_begin(struct ieee80211com *);
STATIC void wi_key_update_end(struct ieee80211com *);

STATIC void wi_push_packet(struct wi_softc *);
STATIC int  wi_get_cfg(struct ifnet *, u_long, void *);
STATIC int  wi_set_cfg(struct ifnet *, u_long, void *);
STATIC int  wi_cfg_txrate(struct wi_softc *);
STATIC int  wi_write_txrate(struct wi_softc *, int);
STATIC int  wi_write_wep(struct wi_softc *);
STATIC int  wi_write_multi(struct wi_softc *);
STATIC int  wi_alloc_fid(struct wi_softc *, int, int *);
STATIC void wi_read_nicid(struct wi_softc *);
STATIC int  wi_write_ssid(struct wi_softc *, int, uint8_t *, int);

STATIC int  wi_cmd(struct wi_softc *, int, int, int, int);
STATIC int  wi_cmd_start(struct wi_softc *, int, int, int, int);
STATIC int  wi_cmd_wait(struct wi_softc *, int, int);
STATIC int  wi_seek_bap(struct wi_softc *, int, int);
STATIC int  wi_read_bap(struct wi_softc *, int, int, void *, int);
STATIC int  wi_write_bap(struct wi_softc *, int, int, void *, int);
STATIC int  wi_mwrite_bap(struct wi_softc *, int, int, struct mbuf *, int);
STATIC int  wi_read_rid(struct wi_softc *, int, void *, int *);
STATIC int  wi_write_rid(struct wi_softc *, int, void *, int);

STATIC int  wi_newstate(struct ieee80211com *, enum ieee80211_state, int);
STATIC void  wi_set_tim(struct ieee80211_node *, int);

STATIC int  wi_scan_ap(struct wi_softc *, uint16_t, uint16_t);
STATIC void wi_scan_result(struct wi_softc *, int, int);

STATIC void wi_dump_pkt(struct wi_frame *, struct ieee80211_node *, int rssi);
STATIC void wi_mend_flags(struct wi_softc *, enum ieee80211_state);

static inline int
wi_write_val(struct wi_softc *sc, int rid, uint16_t val)
{

        val = htole16(val);
        return wi_write_rid(sc, rid, &val, sizeof(val));
}

static  struct timeval lasttxerror;     /* time of last tx error msg */
static  int curtxeps = 0;               /* current tx error msgs/sec */
static  int wi_txerate = 0;             /* tx error rate: max msgs/sec */

#ifdef WI_DEBUG
#define WI_DEBUG_MAX    2
int wi_debug = 0;

#define DPRINTF(X)      if (wi_debug) printf X
#define DPRINTF2(X)     if (wi_debug > 1) printf X
#define IFF_DUMPPKTS(_ifp) \
        (((_ifp)->if_flags & (IFF_DEBUG |IFF_LINK2)) == (IFF_DEBUG |IFF_LINK2))
static int wi_sysctl_verify_debug(SYSCTLFN_PROTO);
#else
#define DPRINTF(X)
#define DPRINTF2(X)
#define IFF_DUMPPKTS(_ifp)      0
#endif

#define WI_INTRS        (WI_EV_RX | WI_EV_ALLOC | WI_EV_INFO | \
                         WI_EV_TX | WI_EV_TX_EXC | WI_EV_CMD)

static const struct wi_card_ident wi_card_ident[] = {
        /* CARD_ID                      CARD_NAME               FIRM_TYPE */
        { WI_NIC_LUCENT_ID,             WI_NIC_LUCENT_STR,      WI_LUCENT },
        { WI_NIC_SONY_ID,               WI_NIC_SONY_STR,        WI_LUCENT },
        { WI_NIC_LUCENT_EMB_ID,         WI_NIC_LUCENT_EMB_STR,  WI_LUCENT },
        { WI_NIC_EVB2_ID,               WI_NIC_EVB2_STR,        WI_INTERSIL },
        { WI_NIC_HWB3763_ID,            WI_NIC_HWB3763_STR,     WI_INTERSIL },
        { WI_NIC_HWB3163_ID,            WI_NIC_HWB3163_STR,     WI_INTERSIL },
        { WI_NIC_HWB3163B_ID,           WI_NIC_HWB3163B_STR,    WI_INTERSIL },
        { WI_NIC_EVB3_ID,               WI_NIC_EVB3_STR,        WI_INTERSIL },
        { WI_NIC_HWB1153_ID,            WI_NIC_HWB1153_STR,     WI_INTERSIL },
        { WI_NIC_P2_SST_ID,             WI_NIC_P2_SST_STR,      WI_INTERSIL },
        { WI_NIC_EVB2_SST_ID,           WI_NIC_EVB2_SST_STR,    WI_INTERSIL },
        { WI_NIC_3842_EVA_ID,           WI_NIC_3842_EVA_STR,    WI_INTERSIL },
        { WI_NIC_3842_PCMCIA_AMD_ID,    WI_NIC_3842_PCMCIA_STR, WI_INTERSIL },
        { WI_NIC_3842_PCMCIA_SST_ID,    WI_NIC_3842_PCMCIA_STR, WI_INTERSIL },
        { WI_NIC_3842_PCMCIA_ATM_ID,    WI_NIC_3842_PCMCIA_STR, WI_INTERSIL },
        { WI_NIC_3842_MINI_AMD_ID,      WI_NIC_3842_MINI_STR,   WI_INTERSIL },
        { WI_NIC_3842_MINI_SST_ID,      WI_NIC_3842_MINI_STR,   WI_INTERSIL },
        { WI_NIC_3842_MINI_ATM_ID,      WI_NIC_3842_MINI_STR,   WI_INTERSIL },
        { WI_NIC_3842_PCI_AMD_ID,       WI_NIC_3842_PCI_STR,    WI_INTERSIL },
        { WI_NIC_3842_PCI_SST_ID,       WI_NIC_3842_PCI_STR,    WI_INTERSIL },
        { WI_NIC_3842_PCI_ATM_ID,       WI_NIC_3842_PCI_STR,    WI_INTERSIL },
        { WI_NIC_P3_PCMCIA_AMD_ID,      WI_NIC_P3_PCMCIA_STR,   WI_INTERSIL },
        { WI_NIC_P3_PCMCIA_SST_ID,      WI_NIC_P3_PCMCIA_STR,   WI_INTERSIL },
        { WI_NIC_P3_MINI_AMD_ID,        WI_NIC_P3_MINI_STR,     WI_INTERSIL },
        { WI_NIC_P3_MINI_SST_ID,        WI_NIC_P3_MINI_STR,     WI_INTERSIL },
        { 0,    NULL,   0 },
};

#ifndef _MODULE
/*
 * Setup sysctl(3) MIB, hw.wi.*
 *
 * TBD condition CTLFLAG_PERMANENT on being a module or not
 */
SYSCTL_SETUP(sysctl_wi, "sysctl wi(4) subtree setup")
{
        int rc;
        const struct sysctlnode *rnode;
#ifdef WI_DEBUG
        const struct sysctlnode *cnode;
#endif /* WI_DEBUG */

        if ((rc = sysctl_createv(clog, 0, NULL, &rnode,
            CTLFLAG_PERMANENT, CTLTYPE_NODE, "wi",
            "Lucent/Prism/Symbol 802.11 controls",
            NULL, 0, NULL, 0, CTL_HW, CTL_CREATE, CTL_EOL)) != 0)
                goto err;

#ifdef WI_DEBUG
        /* control debugging printfs */
        if ((rc = sysctl_createv(clog, 0, &rnode, &cnode,
            CTLFLAG_PERMANENT | CTLFLAG_READWRITE, CTLTYPE_INT,
            "debug", SYSCTL_DESCR("Enable debugging output"),
            wi_sysctl_verify_debug, 0, &wi_debug, 0, CTL_CREATE, CTL_EOL)) != 0)
                goto err;
#endif /* WI_DEBUG */
        return;
err:
        printf("%s: sysctl_createv failed (rc = %d)\n", __func__, rc);
}
#endif

#ifdef WI_DEBUG
static int
wi_sysctl_verify(SYSCTLFN_ARGS, int lower, int upper)
{
        int error, t;
        struct sysctlnode node;

        node = *rnode;
        t = *(int*)rnode->sysctl_data;
        node.sysctl_data = &t;
        error = sysctl_lookup(SYSCTLFN_CALL(&node));
        if (error || newp == NULL)
                return (error);

        if (t < lower || t > upper)
                return (EINVAL);

        *(int*)rnode->sysctl_data = t;

        return (0);
}

static int
wi_sysctl_verify_debug(SYSCTLFN_ARGS)
{
        return wi_sysctl_verify(SYSCTLFN_CALL(__UNCONST(rnode)),
            0, WI_DEBUG_MAX);
}
#endif /* WI_DEBUG */

STATIC int
wi_read_xrid(struct wi_softc *sc, int rid, void *buf, int ebuflen)
{
        int buflen, rc;

        buflen = ebuflen;
        if ((rc = wi_read_rid(sc, rid, buf, &buflen)) != 0)
                return rc;

        if (buflen < ebuflen) {
#ifdef WI_DEBUG
                printf("%s: rid=%#04x read %d, expected %d\n", __func__,
                    rid, buflen, ebuflen);
#endif
                return -1;
        }
        return 0;
}

int
wi_attach(struct wi_softc *sc, const uint8_t *macaddr)
{
        struct ieee80211com *ic = &sc->sc_ic;
        struct ifnet *ifp = &sc->sc_if;
        int chan, nrate, buflen;
        uint16_t val, chanavail;
        struct {
                uint16_t nrates;
                char rates[IEEE80211_RATE_SIZE];
        } ratebuf;
        static const uint8_t empty_macaddr[IEEE80211_ADDR_LEN] = {
                0x00, 0x00, 0x00, 0x00, 0x00, 0x00
        };
        int s;

        sc->sc_soft_ih = softint_establish(SOFTINT_NET, wi_softintr, sc);
        if (sc->sc_soft_ih == NULL) {
                printf(" could not establish softint\n");
                goto err;
        }

        wi_ioctl_init(sc);

        s = splnet();

        /* Make sure interrupts are disabled. */
        CSR_WRITE_2(sc, WI_INT_EN, 0);
        CSR_WRITE_2(sc, WI_EVENT_ACK, ~0);

        sc->sc_invalid = 0;

        /* Reset the NIC. */
        if (wi_reset(sc) != 0) {
                sc->sc_invalid = 1;
                goto fail;
        }

        if (wi_read_xrid(sc, WI_RID_MAC_NODE, ic->ic_myaddr,
                         IEEE80211_ADDR_LEN) != 0 ||
            IEEE80211_ADDR_EQ(ic->ic_myaddr, empty_macaddr)) {
                if (macaddr != NULL)
                        memcpy(ic->ic_myaddr, macaddr, IEEE80211_ADDR_LEN);
                else {
                        printf(" could not get mac address, attach failed\n");
                        goto fail;
                }
        }

        printf(" 802.11 address %s\n", ether_sprintf(ic->ic_myaddr));

        /* Read NIC identification */
        wi_read_nicid(sc);

        memcpy(ifp->if_xname, device_xname(sc->sc_dev), IFNAMSIZ);
        ifp->if_softc = sc;
        ifp->if_start = wi_start;
        ifp->if_ioctl = wi_ioctl;
        ifp->if_watchdog = wi_watchdog;
        ifp->if_init = wi_init;
        ifp->if_stop = wi_stop;
        ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST;
        IFQ_SET_READY(&ifp->if_snd);

        ic->ic_ifp = ifp;
        ic->ic_phytype = IEEE80211_T_DS;
        ic->ic_opmode = IEEE80211_M_STA;
        ic->ic_caps = IEEE80211_C_AHDEMO;
        ic->ic_state = IEEE80211_S_INIT;
        ic->ic_max_aid = WI_MAX_AID;

        /* Find available channel */
        if (wi_read_xrid(sc, WI_RID_CHANNEL_LIST, &chanavail,
                         sizeof(chanavail)) != 0) {
                aprint_normal_dev(sc->sc_dev, "using default channel list\n");
                chanavail = htole16(0x1fff);    /* assume 1-13 */
        }
        for (chan = 16; chan > 0; chan--) {
                if (!isset((uint8_t*)&chanavail, chan - 1))
                        continue;
                ic->ic_ibss_chan = &ic->ic_channels[chan];
                ic->ic_channels[chan].ic_freq =
                    ieee80211_ieee2mhz(chan, IEEE80211_CHAN_2GHZ);
                ic->ic_channels[chan].ic_flags = IEEE80211_CHAN_B;
        }

        /* Find default IBSS channel */
        if (wi_read_xrid(sc, WI_RID_OWN_CHNL, &val, sizeof(val)) == 0) {
                chan = le16toh(val);
                if (isset((uint8_t*)&chanavail, chan - 1))
                        ic->ic_ibss_chan = &ic->ic_channels[chan];
        }
        if (ic->ic_ibss_chan == NULL) {
                aprint_error_dev(sc->sc_dev, "no available channel\n");
                goto fail;
        }

        if (sc->sc_firmware_type == WI_LUCENT) {
                sc->sc_dbm_offset = WI_LUCENT_DBM_OFFSET;
        } else {
                if ((sc->sc_flags & WI_FLAGS_HAS_DBMADJUST) &&
                    wi_read_xrid(sc, WI_RID_DBM_ADJUST, &val, sizeof(val)) == 0)
                        sc->sc_dbm_offset = le16toh(val);
                else
                        sc->sc_dbm_offset = WI_PRISM_DBM_OFFSET;
        }

        sc->sc_flags |= WI_FLAGS_RSSADAPTSTA;

        /*
         * Set flags based on firmware version.
         */
        switch (sc->sc_firmware_type) {
        case WI_LUCENT:
                sc->sc_flags |= WI_FLAGS_HAS_SYSSCALE;
#ifdef WI_HERMES_AUTOINC_WAR
                /* XXX: not confirmed, but never seen for recent firmware */
                if (sc->sc_sta_firmware_ver <  40000) {
                        sc->sc_flags |= WI_FLAGS_BUG_AUTOINC;
                }
#endif
                if (sc->sc_sta_firmware_ver >= 60000)
                        sc->sc_flags |= WI_FLAGS_HAS_MOR;
                if (sc->sc_sta_firmware_ver >= 60006) {
                        ic->ic_caps |= IEEE80211_C_IBSS;
                        ic->ic_caps |= IEEE80211_C_MONITOR;
                }
                ic->ic_caps |= IEEE80211_C_PMGT;
                sc->sc_ibss_port = 1;
                break;

        case WI_INTERSIL:
                sc->sc_flags |= WI_FLAGS_HAS_FRAGTHR;
                sc->sc_flags |= WI_FLAGS_HAS_ROAMING;
                sc->sc_flags |= WI_FLAGS_HAS_SYSSCALE;
                if (sc->sc_sta_firmware_ver > 10101)
                        sc->sc_flags |= WI_FLAGS_HAS_DBMADJUST;
                if (sc->sc_sta_firmware_ver >= 800) {
                        if (sc->sc_sta_firmware_ver != 10402)
                                ic->ic_caps |= IEEE80211_C_HOSTAP;
                        ic->ic_caps |= IEEE80211_C_IBSS;
                        ic->ic_caps |= IEEE80211_C_MONITOR;
                }
                ic->ic_caps |= IEEE80211_C_PMGT;
                sc->sc_ibss_port = 0;
                sc->sc_alt_retry = 2;
                break;

        case WI_SYMBOL:
                sc->sc_flags |= WI_FLAGS_HAS_DIVERSITY;
                if (sc->sc_sta_firmware_ver >= 20000)
                        ic->ic_caps |= IEEE80211_C_IBSS;
                sc->sc_ibss_port = 4;
                break;
        }

        /*
         * Find out if we support WEP on this card.
         */
        if (wi_read_xrid(sc, WI_RID_WEP_AVAIL, &val, sizeof(val)) == 0 &&
            val != htole16(0))
                ic->ic_caps |= IEEE80211_C_WEP;

        /* Find supported rates. */
        buflen = sizeof(ratebuf);
        if (wi_read_rid(sc, WI_RID_DATA_RATES, &ratebuf, &buflen) == 0 &&
            buflen > 2) {
                nrate = le16toh(ratebuf.nrates);
                if (nrate > IEEE80211_RATE_SIZE)
                        nrate = IEEE80211_RATE_SIZE;
                memcpy(ic->ic_sup_rates[IEEE80211_MODE_11B].rs_rates,
                    &ratebuf.rates[0], nrate);
                ic->ic_sup_rates[IEEE80211_MODE_11B].rs_nrates = nrate;
        } else {
                aprint_error_dev(sc->sc_dev, "no supported rate list\n");
                goto fail;
        }

        sc->sc_max_datalen = 2304;
        sc->sc_rts_thresh = 2347;
        sc->sc_frag_thresh = 2346;
        sc->sc_system_scale = 1;
        sc->sc_cnfauthmode = IEEE80211_AUTH_OPEN;
        sc->sc_roaming_mode = 1;

        callout_init(&sc->sc_rssadapt_ch, 0);

        /*
         * Call MI attach routines.
         */
        if_initialize(ifp);
        ieee80211_ifattach(ic);
        /* Use common softint-based if_input */
        ifp->if_percpuq = if_percpuq_create(ifp);
        if_register(ifp);

        sc->sc_newstate = ic->ic_newstate;
        sc->sc_set_tim = ic->ic_set_tim;
        ic->ic_newstate = wi_newstate;
        ic->ic_node_alloc = wi_node_alloc;
        ic->ic_node_free = wi_node_free;
        ic->ic_set_tim = wi_set_tim;

        ic->ic_crypto.cs_key_delete = wi_key_delete;
        ic->ic_crypto.cs_key_set = wi_key_set;
        ic->ic_crypto.cs_key_update_begin = wi_key_update_begin;
        ic->ic_crypto.cs_key_update_end = wi_key_update_end;

        ieee80211_media_init(ic, wi_media_change, wi_media_status);

        bpf_attach2(ifp, DLT_IEEE802_11_RADIO,
            sizeof(struct ieee80211_frame) + 64, &sc->sc_drvbpf);

        memset(&sc->sc_rxtapu, 0, sizeof(sc->sc_rxtapu));
        sc->sc_rxtap.wr_ihdr.it_len = htole16(sizeof(sc->sc_rxtapu));
        sc->sc_rxtap.wr_ihdr.it_present = htole32(WI_RX_RADIOTAP_PRESENT);

        memset(&sc->sc_txtapu, 0, sizeof(sc->sc_txtapu));
        sc->sc_txtap.wt_ihdr.it_len = htole16(sizeof(sc->sc_txtapu));
        sc->sc_txtap.wt_ihdr.it_present = htole32(WI_TX_RADIOTAP_PRESENT);

        /* Attach is successful. */
        sc->sc_attached = 1;

        splx(s);
        ieee80211_announce(ic);
        return 0;

fail:   splx(s);
        softint_disestablish(sc->sc_soft_ih);
        sc->sc_soft_ih = NULL;
err:    return 1;
}

int
wi_detach(struct wi_softc *sc)
{
        struct ifnet *ifp = &sc->sc_if;
        int s;

        if (!sc->sc_attached)
                return 0;

        sc->sc_invalid = 1;
        s = splnet();

        wi_stop(ifp, 1);

        ieee80211_ifdetach(&sc->sc_ic);
        if_detach(ifp);
        splx(s);
        wi_ioctl_drain(sc);
        softint_disestablish(sc->sc_soft_ih);
        sc->sc_soft_ih = NULL;
        return 0;
}

int
wi_activate(device_t self, enum devact act)
{
        struct wi_softc *sc = device_private(self);

        switch (act) {
        case DVACT_DEACTIVATE:
                if_deactivate(&sc->sc_if);
                return 0;
        default:
                return EOPNOTSUPP;
        }
}

int
wi_intr(void *arg)
{
        struct wi_softc *sc = arg;
        struct ifnet *ifp = &sc->sc_if;
        uint16_t status;

        if (sc->sc_enabled == 0 ||
            !device_is_active(sc->sc_dev) ||
            (ifp->if_flags & IFF_RUNNING) == 0)
                return 0;

        if ((ifp->if_flags & IFF_UP) == 0) {
                CSR_WRITE_2(sc, WI_INT_EN, 0);
                CSR_WRITE_2(sc, WI_EVENT_ACK, ~0);
                return 1;
        }

        /* This is superfluous on Prism, but Lucent breaks if we
         * do not disable interrupts.
         */
        CSR_WRITE_2(sc, WI_INT_EN, 0);

        status = CSR_READ_2(sc, WI_EVENT_STAT);
#ifdef WI_DEBUG
        if (wi_debug > 1) {
                printf("%s: status %#04x\n", __func__, status);
        }
#endif /* WI_DEBUG */
        if ((status & WI_INTRS) == 0) {
                /* re-enable interrupts */
                CSR_WRITE_2(sc, WI_INT_EN, WI_INTRS);
                return 0;
        }

        softint_schedule(sc->sc_soft_ih);
        return 1;
}

STATIC void
wi_softintr(void *arg)
{
        int i, s;
        struct wi_softc *sc = arg;
        struct ifnet *ifp = &sc->sc_if;
        uint16_t status;

        if (sc->sc_enabled == 0 ||
            !device_is_active(sc->sc_dev) ||
            (ifp->if_flags & IFF_RUNNING) == 0)
                goto out;

        if ((ifp->if_flags & IFF_UP) == 0) {
                CSR_WRITE_2(sc, WI_EVENT_ACK, ~0);
                return;
        }

        /* maximum 10 loops per interrupt */
        for (i = 0; i < 10; i++) {
                status = CSR_READ_2(sc, WI_EVENT_STAT);
#ifdef WI_DEBUG
                if (wi_debug > 1) {
                        printf("%s: iter %d status %#04x\n", __func__, i,
                            status);
                }
#endif /* WI_DEBUG */
                if ((status & WI_INTRS) == 0)
                        break;

                sc->sc_status = status;

                if (status & WI_EV_RX)
                        wi_rx_intr(sc);

                if (status & WI_EV_ALLOC)
                        wi_txalloc_intr(sc);

                if (status & WI_EV_TX)
                        wi_tx_intr(sc);

                if (status & WI_EV_TX_EXC)
                        wi_tx_ex_intr(sc);

                if (status & WI_EV_INFO)
                        wi_info_intr(sc);

                CSR_WRITE_2(sc, WI_EVENT_ACK, sc->sc_status);

                if (sc->sc_status & WI_EV_CMD)
                        wi_cmd_intr(sc);

                if ((ifp->if_flags & IFF_OACTIVE) == 0 &&
                    (sc->sc_flags & WI_FLAGS_OUTRANGE) == 0 &&
                    !IFQ_IS_EMPTY(&ifp->if_snd)) {
                        s = splnet();
                        wi_start(ifp);
                        splx(s);
                }

                sc->sc_status = 0;
        }
        if (i == 10)
                softint_schedule(sc->sc_soft_ih);

out:
        sc->sc_status = 0;

        /* re-enable interrupts */
        CSR_WRITE_2(sc, WI_INT_EN, WI_INTRS);
}

#define arraylen(a) (sizeof(a) / sizeof((a)[0]))

STATIC void
wi_rssdescs_init(struct wi_rssdesc (*rssd)[WI_NTXRSS], wi_rssdescq_t *rssdfree)
{
        int i;
        SLIST_INIT(rssdfree);
        for (i = 0; i < arraylen(*rssd); i++) {
                SLIST_INSERT_HEAD(rssdfree, &(*rssd)[i], rd_next);
        }
}

STATIC void
wi_rssdescs_reset(struct ieee80211com *ic, struct wi_rssdesc (*rssd)[WI_NTXRSS],
    wi_rssdescq_t *rssdfree, uint8_t (*txpending)[IEEE80211_RATE_MAXSIZE])
{
        struct ieee80211_node *ni;
        int i;
        for (i = 0; i < arraylen(*rssd); i++) {
                ni = (*rssd)[i].rd_desc.id_node;
                (*rssd)[i].rd_desc.id_node = NULL;
                if (ni != NULL && (ic->ic_ifp->if_flags & IFF_DEBUG) != 0)
                        printf("%s: cleaning outstanding rssadapt "
                            "descriptor for %s\n",
                            ic->ic_ifp->if_xname, ether_sprintf(ni->ni_macaddr));
                if (ni != NULL)
                        ieee80211_free_node(ni);
        }
        memset(*txpending, 0, sizeof(*txpending));
        wi_rssdescs_init(rssd, rssdfree);
}

STATIC int
wi_init(struct ifnet *ifp)
{
        struct wi_softc *sc = ifp->if_softc;
        struct ieee80211com *ic = &sc->sc_ic;
        struct wi_joinreq join;
        int i;
        int error = 0, wasenabled;

        DPRINTF(("wi_init: enabled %d\n", sc->sc_enabled));
        wasenabled = sc->sc_enabled;
        if (!sc->sc_enabled) {
                if ((error = (*sc->sc_enable)(sc->sc_dev, 1)) != 0)
                        goto out;
                sc->sc_enabled = 1;
        } else
                wi_stop(ifp, 0);

        /* Symbol firmware cannot be initialized more than once */
        if (sc->sc_firmware_type != WI_SYMBOL || !wasenabled)
                if ((error = wi_reset(sc)) != 0)
                        goto out;

        /* common 802.11 configuration */
        ic->ic_flags &= ~IEEE80211_F_IBSSON;
        sc->sc_flags &= ~WI_FLAGS_OUTRANGE;
        switch (ic->ic_opmode) {
        case IEEE80211_M_STA:
                wi_write_val(sc, WI_RID_PORTTYPE, WI_PORTTYPE_BSS);
                break;
        case IEEE80211_M_IBSS:
                wi_write_val(sc, WI_RID_PORTTYPE, sc->sc_ibss_port);
                ic->ic_flags |= IEEE80211_F_IBSSON;
                break;
        case IEEE80211_M_AHDEMO:
                wi_write_val(sc, WI_RID_PORTTYPE, WI_PORTTYPE_ADHOC);
                break;
        case IEEE80211_M_HOSTAP:
                wi_write_val(sc, WI_RID_PORTTYPE, WI_PORTTYPE_HOSTAP);
                break;
        case IEEE80211_M_MONITOR:
                if (sc->sc_firmware_type == WI_LUCENT)
                        wi_write_val(sc, WI_RID_PORTTYPE, WI_PORTTYPE_ADHOC);
                wi_cmd(sc, WI_CMD_TEST | (WI_TEST_MONITOR << 8), 0, 0, 0);
                break;
        }

        /* Intersil interprets this RID as joining ESS even in IBSS mode */
        if (sc->sc_firmware_type == WI_LUCENT &&
            (ic->ic_flags & IEEE80211_F_IBSSON) && ic->ic_des_esslen > 0)
                wi_write_val(sc, WI_RID_CREATE_IBSS, 1);
        else
                wi_write_val(sc, WI_RID_CREATE_IBSS, 0);
        wi_write_val(sc, WI_RID_MAX_SLEEP, ic->ic_lintval);
        wi_write_ssid(sc, WI_RID_DESIRED_SSID, ic->ic_des_essid,
            ic->ic_des_esslen);
        wi_write_val(sc, WI_RID_OWN_CHNL,
            ieee80211_chan2ieee(ic, ic->ic_ibss_chan));
        wi_write_ssid(sc, WI_RID_OWN_SSID, ic->ic_des_essid, ic->ic_des_esslen);
        IEEE80211_ADDR_COPY(ic->ic_myaddr, CLLADDR(ifp->if_sadl));
        wi_write_rid(sc, WI_RID_MAC_NODE, ic->ic_myaddr, IEEE80211_ADDR_LEN);
        if (ic->ic_caps & IEEE80211_C_PMGT)
                wi_write_val(sc, WI_RID_PM_ENABLED,
                    (ic->ic_flags & IEEE80211_F_PMGTON) ? 1 : 0);

        /* not yet common 802.11 configuration */
        wi_write_val(sc, WI_RID_MAX_DATALEN, sc->sc_max_datalen);
        wi_write_val(sc, WI_RID_RTS_THRESH, sc->sc_rts_thresh);
        if (sc->sc_flags & WI_FLAGS_HAS_FRAGTHR)
                wi_write_val(sc, WI_RID_FRAG_THRESH, sc->sc_frag_thresh);

        /* driver specific 802.11 configuration */
        if (sc->sc_flags & WI_FLAGS_HAS_SYSSCALE)
                wi_write_val(sc, WI_RID_SYSTEM_SCALE, sc->sc_system_scale);
        if (sc->sc_flags & WI_FLAGS_HAS_ROAMING)
                wi_write_val(sc, WI_RID_ROAMING_MODE, sc->sc_roaming_mode);
        if (sc->sc_flags & WI_FLAGS_HAS_MOR)
                wi_write_val(sc, WI_RID_MICROWAVE_OVEN, sc->sc_microwave_oven);
        wi_cfg_txrate(sc);
        wi_write_ssid(sc, WI_RID_NODENAME, sc->sc_nodename, sc->sc_nodelen);

#ifndef IEEE80211_NO_HOSTAP
        if (ic->ic_opmode == IEEE80211_M_HOSTAP &&
            sc->sc_firmware_type == WI_INTERSIL) {
                wi_write_val(sc, WI_RID_OWN_BEACON_INT, ic->ic_lintval);
                wi_write_val(sc, WI_RID_DTIM_PERIOD, 1);
        }
#endif /* !IEEE80211_NO_HOSTAP */

        if (sc->sc_firmware_type == WI_INTERSIL) {
                struct ieee80211_rateset *rs =
                    &ic->ic_sup_rates[IEEE80211_MODE_11B];
                uint16_t basic = 0, supported = 0, rate;

                for (i = 0; i < rs->rs_nrates; i++) {
                        switch (rs->rs_rates[i] & IEEE80211_RATE_VAL) {
                        case 2:
                                rate = 1;
                                break;
                        case 4:
                                rate = 2;
                                break;
                        case 11:
                                rate = 4;
                                break;
                        case 22:
                                rate = 8;
                                break;
                        default:
                                rate = 0;
                                break;
                        }
                        if (rs->rs_rates[i] & IEEE80211_RATE_BASIC)
                                basic |= rate;
                        supported |= rate;
                }
                wi_write_val(sc, WI_RID_BASIC_RATE, basic);
                wi_write_val(sc, WI_RID_SUPPORT_RATE, supported);
                wi_write_val(sc, WI_RID_ALT_RETRY_COUNT, sc->sc_alt_retry);
        }

        /*
         * Initialize promisc mode.
         *      Being in Host-AP mode causes a great
         *      deal of pain if promiscuous mode is set.
         *      Therefore we avoid confusing the firmware
         *      and always reset promisc mode in Host-AP
         *      mode.  Host-AP sees all the packets anyway.
         */
        if (ic->ic_opmode != IEEE80211_M_HOSTAP &&
            (ifp->if_flags & IFF_PROMISC) != 0) {
                wi_write_val(sc, WI_RID_PROMISC, 1);
        } else {
                wi_write_val(sc, WI_RID_PROMISC, 0);
        }

        /* Configure WEP. */
        if (ic->ic_caps & IEEE80211_C_WEP) {
                sc->sc_cnfauthmode = ic->ic_bss->ni_authmode;
                wi_write_wep(sc);
        }

        /* Set multicast filter. */
        wi_write_multi(sc);

        sc->sc_txalloc = 0;
        sc->sc_txalloced = 0;
        sc->sc_txqueue = 0;
        sc->sc_txqueued = 0;
        sc->sc_txstart = 0;
        sc->sc_txstarted = 0;

        if (sc->sc_firmware_type != WI_SYMBOL || !wasenabled) {
                sc->sc_buflen = IEEE80211_MAX_LEN + sizeof(struct wi_frame);
                if (sc->sc_firmware_type == WI_SYMBOL)
                        sc->sc_buflen = 1585;   /* XXX */
                for (i = 0; i < WI_NTXBUF; i++) {
                        error = wi_alloc_fid(sc, sc->sc_buflen,
                            &sc->sc_txd[i].d_fid);
                        if (error) {
                                aprint_error_dev(sc->sc_dev,
                                    "tx buffer allocation failed\n");
                                goto out;
                        }
                        DPRINTF2(("wi_init: txbuf %d allocated %x\n", i,
                            sc->sc_txd[i].d_fid));
                        ++sc->sc_txalloced;
                }
        }

        wi_rssdescs_init(&sc->sc_rssd, &sc->sc_rssdfree);

        /* Enable desired port */
        wi_cmd(sc, WI_CMD_ENABLE | sc->sc_portnum, 0, 0, 0);
        ifp->if_flags |= IFF_RUNNING;
        ifp->if_flags &= ~IFF_OACTIVE;
        ic->ic_state = IEEE80211_S_INIT;

        if (ic->ic_opmode == IEEE80211_M_AHDEMO ||
            ic->ic_opmode == IEEE80211_M_IBSS ||
            ic->ic_opmode == IEEE80211_M_MONITOR ||
            ic->ic_opmode == IEEE80211_M_HOSTAP)
                ieee80211_create_ibss(ic, ic->ic_ibss_chan);

        /* Enable interrupts */
        CSR_WRITE_2(sc, WI_INT_EN, WI_INTRS);

#ifndef IEEE80211_NO_HOSTAP
        if (!wasenabled &&
            ic->ic_opmode == IEEE80211_M_HOSTAP &&
            sc->sc_firmware_type == WI_INTERSIL) {
                /* XXX: some card need to be re-enabled for hostap */
                wi_cmd(sc, WI_CMD_DISABLE | WI_PORT0, 0, 0, 0);
                wi_cmd(sc, WI_CMD_ENABLE | WI_PORT0, 0, 0, 0);
        }
#endif /* !IEEE80211_NO_HOSTAP */

        if (ic->ic_opmode == IEEE80211_M_STA &&
            ((ic->ic_flags & IEEE80211_F_DESBSSID) ||
            ic->ic_des_chan != IEEE80211_CHAN_ANYC)) {
                memset(&join, 0, sizeof(join));
                if (ic->ic_flags & IEEE80211_F_DESBSSID)
                        IEEE80211_ADDR_COPY(&join.wi_bssid, ic->ic_des_bssid);
                if (ic->ic_des_chan != IEEE80211_CHAN_ANYC)
                        join.wi_chan =
                            htole16(ieee80211_chan2ieee(ic, ic->ic_des_chan));
                /* Lucent firmware does not support the JOIN RID. */
                if (sc->sc_firmware_type != WI_LUCENT)
                        wi_write_rid(sc, WI_RID_JOIN_REQ, &join, sizeof(join));
        }

 out:
        if (error) {
                printf("%s: interface not running\n", device_xname(sc->sc_dev));
                wi_stop(ifp, 0);
        }
        DPRINTF(("wi_init: return %d\n", error));
        return error;
}

STATIC void
wi_txcmd_wait(struct wi_softc *sc)
{
        KASSERT(sc->sc_txcmds == 1);
        if (sc->sc_status & WI_EV_CMD) {
                sc->sc_status &= ~WI_EV_CMD;
                CSR_WRITE_2(sc, WI_EVENT_ACK, WI_EV_CMD);
        } else
                (void)wi_cmd_wait(sc, WI_CMD_TX | WI_RECLAIM, 0);
}

STATIC void
wi_stop(struct ifnet *ifp, int disable)
{
        struct wi_softc *sc = ifp->if_softc;
        struct ieee80211com *ic = &sc->sc_ic;
        int s;

        if (!sc->sc_enabled)
                return;

        s = splnet();

        DPRINTF(("wi_stop: disable %d\n", disable));

        ieee80211_new_state(ic, IEEE80211_S_INIT, -1);

        /* wait for tx command completion (deassoc, deauth) */
        while (sc->sc_txcmds > 0) {
                wi_txcmd_wait(sc);
                wi_cmd_intr(sc);
        }

        /* TBD wait for deassoc, deauth tx completion? */

        if (!sc->sc_invalid) {
                CSR_WRITE_2(sc, WI_INT_EN, 0);
                wi_cmd(sc, WI_CMD_DISABLE | sc->sc_portnum, 0, 0, 0);
        }

        wi_rssdescs_reset(ic, &sc->sc_rssd, &sc->sc_rssdfree,
            &sc->sc_txpending);

        sc->sc_tx_timer = 0;
        sc->sc_scan_timer = 0;
        sc->sc_false_syns = 0;
        sc->sc_naps = 0;
        ifp->if_flags &= ~(IFF_OACTIVE | IFF_RUNNING);
        ifp->if_timer = 0;

        if (disable) {
                (*sc->sc_enable)(sc->sc_dev, 0);
                sc->sc_enabled = 0;
        }
        splx(s);
}

/*
 * Choose a data rate for a packet len bytes long that suits the packet
 * type and the wireless conditions.
 *
 * TBD Adapt fragmentation threshold.
 */
STATIC int
wi_choose_rate(struct ieee80211com *ic, struct ieee80211_node *ni,
    struct ieee80211_frame *wh, u_int len)
{
        struct wi_softc *sc = ic->ic_ifp->if_softc;
        struct wi_node *wn = (void*)ni;
        struct ieee80211_rssadapt *ra = &wn->wn_rssadapt;
        int do_not_adapt, i, rateidx, s;

        do_not_adapt = (ic->ic_opmode != IEEE80211_M_HOSTAP) &&
            (sc->sc_flags & WI_FLAGS_RSSADAPTSTA) == 0;

        s = splnet();

        rateidx = ieee80211_rssadapt_choose(ra, &ni->ni_rates, wh, len,
            ic->ic_fixed_rate,
            ((ic->ic_ifp->if_flags & IFF_DEBUG) == 0) ? NULL : ic->ic_ifp->if_xname,
            do_not_adapt);

        ni->ni_txrate = rateidx;

        if (ic->ic_opmode != IEEE80211_M_HOSTAP) {
                /* choose the slowest pending rate so that we don't
                 * accidentally send a packet on the MAC's queue
                 * too fast. TBD find out if the MAC labels Tx
                 * packets w/ rate when enqueued or dequeued.
                 */
                for (i = 0; i < rateidx && sc->sc_txpending[i] == 0; i++);
                rateidx = i;
        }

        splx(s);
        return (rateidx);
}

STATIC void
wi_raise_rate(struct ieee80211com *ic, struct ieee80211_rssdesc *id)
{
        struct wi_node *wn;
        int s;

        s = splnet();
        if (id->id_node == NULL)
                goto out;

        wn = (void*)id->id_node;
        ieee80211_rssadapt_raise_rate(ic, &wn->wn_rssadapt, id);
out:
        splx(s);
}

STATIC void
wi_lower_rate(struct ieee80211com *ic, struct ieee80211_rssdesc *id)
{
        struct ieee80211_node *ni;
        struct wi_node *wn;
        int s;

        s = splnet();

        if ((ni = id->id_node) == NULL) {
                DPRINTF(("wi_lower_rate: missing node\n"));
                goto out;
        }

        wn = (void *)ni;

        ieee80211_rssadapt_lower_rate(ic, ni, &wn->wn_rssadapt, id);
out:
        splx(s);
}

STATIC void
wi_start(struct ifnet *ifp)
{
        struct wi_softc *sc = ifp->if_softc;
        struct ieee80211com *ic = &sc->sc_ic;
        struct ether_header *eh;
        struct ieee80211_node *ni;
        struct ieee80211_frame *wh;
        struct ieee80211_rateset *rs;
        struct wi_rssdesc *rd;
        struct ieee80211_rssdesc *id;
        struct mbuf *m0;
        struct wi_frame frmhdr;
        int cur, fid, off, rateidx;

        if (!sc->sc_enabled || sc->sc_invalid)
                return;
        if (sc->sc_flags & WI_FLAGS_OUTRANGE)
                return;

        memset(&frmhdr, 0, sizeof(frmhdr));
        cur = sc->sc_txqueue;
        for (;;) {
                ni = ic->ic_bss;
                if (sc->sc_txalloced == 0 || SLIST_EMPTY(&sc->sc_rssdfree)) {
                        ifp->if_flags |= IFF_OACTIVE;
                        break;
                }
                if (!IF_IS_EMPTY(&ic->ic_mgtq)) {
                        IF_DEQUEUE(&ic->ic_mgtq, m0);
                        m_copydata(m0, 4, ETHER_ADDR_LEN * 2,
                            (void *)&frmhdr.wi_ehdr);
                        frmhdr.wi_ehdr.ether_type = 0;
                        wh = mtod(m0, struct ieee80211_frame *);
                        ni = M_GETCTX(m0, struct ieee80211_node *);
                        M_CLEARCTX(m0);
                } else if (ic->ic_state == IEEE80211_S_RUN) {
                        IFQ_POLL(&ifp->if_snd, m0);
                        if (m0 == NULL)
                                break;
                        IFQ_DEQUEUE(&ifp->if_snd, m0);
                        if_statinc(ifp, if_opackets);
                        m_copydata(m0, 0, ETHER_HDR_LEN,
                            (void *)&frmhdr.wi_ehdr);
                        bpf_mtap(ifp, m0, BPF_D_OUT);

                        eh = mtod(m0, struct ether_header *);
                        ni = ieee80211_find_txnode(ic, eh->ether_dhost);
                        if (ni == NULL) {
                                if_statinc(ifp, if_oerrors);
                                continue;
                        }
                        if ((ni->ni_flags & IEEE80211_NODE_PWR_MGT) &&
                            (m0->m_flags & M_PWR_SAV) == 0) {
                                ieee80211_pwrsave(ic, ni, m0);
                                goto next;
                        }
                        if ((m0 = ieee80211_encap(ic, m0, ni)) == NULL) {
                                ieee80211_free_node(ni);
                                if_statinc(ifp, if_oerrors);
                                continue;
                        }
                        wh = mtod(m0, struct ieee80211_frame *);
                } else
                        break;
                bpf_mtap3(ic->ic_rawbpf, m0, BPF_D_OUT);
                frmhdr.wi_tx_ctl =
                    htole16(WI_ENC_TX_802_11|WI_TXCNTL_TX_EX|WI_TXCNTL_TX_OK);
#ifndef IEEE80211_NO_HOSTAP
                if (ic->ic_opmode == IEEE80211_M_HOSTAP)
                        frmhdr.wi_tx_ctl |= htole16(WI_TXCNTL_ALTRTRY);
                if (ic->ic_opmode == IEEE80211_M_HOSTAP &&
                    (wh->i_fc[1] & IEEE80211_FC1_WEP)) {
                        if (ieee80211_crypto_encap(ic, ni, m0) == NULL) {
                                m_freem(m0);
                                if_statinc(ifp, if_oerrors);
                                goto next;
                        }
                        frmhdr.wi_tx_ctl |= htole16(WI_TXCNTL_NOCRYPT);
                }
#endif /* !IEEE80211_NO_HOSTAP */

                rateidx = wi_choose_rate(ic, ni, wh, m0->m_pkthdr.len);
                rs = &ni->ni_rates;

                if (sc->sc_drvbpf) {
                        struct wi_tx_radiotap_header *tap = &sc->sc_txtap;

                        tap->wt_rate = rs->rs_rates[rateidx];
                        tap->wt_chan_freq =
                            htole16(ic->ic_bss->ni_chan->ic_freq);
                        tap->wt_chan_flags =
                            htole16(ic->ic_bss->ni_chan->ic_flags);
                        /* TBD tap->wt_flags */

                        bpf_mtap2(sc->sc_drvbpf, tap, tap->wt_ihdr.it_len, m0,
                            BPF_D_OUT);
                }

                rd = SLIST_FIRST(&sc->sc_rssdfree);
                id = &rd->rd_desc;
                id->id_len = m0->m_pkthdr.len;
                id->id_rateidx = ni->ni_txrate;
                id->id_rssi = ni->ni_rssi;

                frmhdr.wi_tx_idx = rd - sc->sc_rssd;

                if (ic->ic_opmode == IEEE80211_M_HOSTAP)
                        frmhdr.wi_tx_rate = 5 * (rs->rs_rates[rateidx] &
                            IEEE80211_RATE_VAL);
                else if (sc->sc_flags & WI_FLAGS_RSSADAPTSTA)
                        (void)wi_write_txrate(sc, rs->rs_rates[rateidx]);

                m_copydata(m0, 0, sizeof(struct ieee80211_frame),
                    (void *)&frmhdr.wi_whdr);
                m_adj(m0, sizeof(struct ieee80211_frame));
                frmhdr.wi_dat_len = htole16(m0->m_pkthdr.len);
                if (IFF_DUMPPKTS(ifp))
                        wi_dump_pkt(&frmhdr, ni, -1);
                fid = sc->sc_txd[cur].d_fid;
                off = sizeof(frmhdr);
                if (wi_write_bap(sc, fid, 0, &frmhdr, sizeof(frmhdr)) != 0 ||
                    wi_mwrite_bap(sc, fid, off, m0, m0->m_pkthdr.len) != 0) {
                        aprint_error_dev(sc->sc_dev, "%s write fid %x failed\n",
                            __func__, fid);
                        if_statinc(ifp, if_oerrors);
                        m_freem(m0);
                        goto next;
                }
                m_freem(m0);
                sc->sc_txpending[ni->ni_txrate]++;
                --sc->sc_txalloced;
                if (sc->sc_txqueued++ == 0) {
#ifdef DIAGNOSTIC
                        if (cur != sc->sc_txstart)
                                printf("%s: ring is desynchronized\n",
                                    device_xname(sc->sc_dev));
#endif
                        wi_push_packet(sc);
                } else {
#ifdef WI_RING_DEBUG
        printf("%s: queue %04x, alloc %d queue %d start %d alloced %d queued %d started %d\n",
            device_xname(sc->sc_dev), fid,
            sc->sc_txalloc, sc->sc_txqueue, sc->sc_txstart,
            sc->sc_txalloced, sc->sc_txqueued, sc->sc_txstarted);
#endif
                }
                sc->sc_txqueue = cur = (cur + 1) % WI_NTXBUF;
                SLIST_REMOVE_HEAD(&sc->sc_rssdfree, rd_next);
                id->id_node = ni;
                continue;
next:
                if (ni != NULL)
                        ieee80211_free_node(ni);
        }
}


STATIC int
wi_reset(struct wi_softc *sc)
{
        int i, error;

        DPRINTF(("wi_reset\n"));

        if (sc->sc_reset)
                (*sc->sc_reset)(sc);

        error = 0;
        for (i = 0; i < 5; i++) {
                if (sc->sc_invalid)
                        return ENXIO;
                DELAY(20*1000); /* XXX: way too long! */
                if ((error = wi_cmd(sc, WI_CMD_INI, 0, 0, 0)) == 0)
                        break;
        }
        if (error) {
                aprint_error_dev(sc->sc_dev, "init failed\n");
                return error;
        }
        CSR_WRITE_2(sc, WI_INT_EN, 0);
        CSR_WRITE_2(sc, WI_EVENT_ACK, ~0);

        /* Calibrate timer. */
        wi_write_val(sc, WI_RID_TICK_TIME, 0);
        return 0;
}

STATIC void
wi_watchdog(struct ifnet *ifp)
{
        struct wi_softc *sc = ifp->if_softc;

        ifp->if_timer = 0;
        if (!sc->sc_enabled)
                return;

        if (sc->sc_tx_timer) {
                if (--sc->sc_tx_timer == 0) {
                        printf("%s: device timeout\n", ifp->if_xname);
                        if_statinc(ifp, if_oerrors);
                        wi_init(ifp);
                        return;
                }
                ifp->if_timer = 1;
        }

        if (sc->sc_scan_timer) {
                if (--sc->sc_scan_timer <= WI_SCAN_WAIT - WI_SCAN_INQWAIT &&
                    sc->sc_firmware_type == WI_INTERSIL) {
                        DPRINTF(("wi_watchdog: inquire scan\n"));
                        wi_cmd(sc, WI_CMD_INQUIRE, WI_INFO_SCAN_RESULTS, 0, 0);
                }
                if (sc->sc_scan_timer)
                        ifp->if_timer = 1;
        }

        /* TODO: rate control */
        ieee80211_watchdog(&sc->sc_ic);
}

static int
wi_ioctl_enter(struct wi_softc *sc)
{
        int rc = 0;

        mutex_enter(&sc->sc_ioctl_mtx);
        sc->sc_ioctl_nwait++;
        while (sc->sc_ioctl_lwp != NULL && sc->sc_ioctl_lwp != curlwp) {
                rc = sc->sc_ioctl_gone
                    ? ENXIO
                    : cv_wait_sig(&sc->sc_ioctl_cv, &sc->sc_ioctl_mtx);
                if (rc != 0)
                        break;
        }
        if (rc == 0) {
                sc->sc_ioctl_lwp = curlwp;
                sc->sc_ioctl_depth++;
        }
        if (--sc->sc_ioctl_nwait == 0)
                cv_signal(&sc->sc_ioctl_cv);
        mutex_exit(&sc->sc_ioctl_mtx);
        return rc;
}

static void
wi_ioctl_exit(struct wi_softc *sc)
{
        KASSERT(sc->sc_ioctl_lwp == curlwp);
        mutex_enter(&sc->sc_ioctl_mtx);
        if (--sc->sc_ioctl_depth == 0) {
                sc->sc_ioctl_lwp = NULL;
                cv_signal(&sc->sc_ioctl_cv);
        }
        mutex_exit(&sc->sc_ioctl_mtx);
}

static void
wi_ioctl_init(struct wi_softc *sc)
{
        mutex_init(&sc->sc_ioctl_mtx, MUTEX_DEFAULT, IPL_NONE);
        cv_init(&sc->sc_ioctl_cv, device_xname(sc->sc_dev));
}

static void
wi_ioctl_drain(struct wi_softc *sc)
{
        wi_ioctl_enter(sc);

        mutex_enter(&sc->sc_ioctl_mtx);
        sc->sc_ioctl_gone = true;
        cv_broadcast(&sc->sc_ioctl_cv);
        while (sc->sc_ioctl_nwait != 0)
                cv_wait(&sc->sc_ioctl_cv, &sc->sc_ioctl_mtx);
        mutex_exit(&sc->sc_ioctl_mtx);

        wi_ioctl_exit(sc);

        mutex_destroy(&sc->sc_ioctl_mtx);
        cv_destroy(&sc->sc_ioctl_cv);
}

STATIC int
wi_ioctl(struct ifnet *ifp, u_long cmd, void *data)
{
        struct wi_softc *sc = ifp->if_softc;
        struct ieee80211com *ic = &sc->sc_ic;
        int s, error = 0;

        if (!device_is_active(sc->sc_dev))
                return ENXIO;

        s = splnet();

        if ((error = wi_ioctl_enter(sc)) != 0) {
                splx(s);
                return error;
        }

        switch (cmd) {
        case SIOCSIFFLAGS:
                if ((error = ifioctl_common(ifp, cmd, data)) != 0)
                        break;
                /*
                 * Can't do promisc and hostap at the same time.  If all that's
                 * changing is the promisc flag, try to short-circuit a call to
                 * wi_init() by just setting PROMISC in the hardware.
                 */
                if (ifp->if_flags & IFF_UP) {
                        if (sc->sc_enabled) {
                                if (ic->ic_opmode != IEEE80211_M_HOSTAP &&
                                    (ifp->if_flags & IFF_PROMISC) != 0)
                                        wi_write_val(sc, WI_RID_PROMISC, 1);
                                else
                                        wi_write_val(sc, WI_RID_PROMISC, 0);
                        } else
                                error = wi_init(ifp);
                } else if (sc->sc_enabled)
                        wi_stop(ifp, 1);
                break;
        case SIOCADDMULTI:
        case SIOCDELMULTI:
                if ((error = ether_ioctl(ifp, cmd, data)) == ENETRESET) {
                        if (ifp->if_flags & IFF_RUNNING) {
                                /* do not rescan */
                                error = wi_write_multi(sc);
                        } else
                                error = 0;
                }
                break;
        case SIOCGIFGENERIC:
                error = wi_get_cfg(ifp, cmd, data);
                break;
        case SIOCSIFGENERIC:
                error = kauth_authorize_network(kauth_cred_get(),
                    KAUTH_NETWORK_INTERFACE,
                    KAUTH_REQ_NETWORK_INTERFACE_SETPRIV, ifp, KAUTH_ARG(cmd),
                    NULL);
                if (error)
                        break;
                error = wi_set_cfg(ifp, cmd, data);
                if (error == ENETRESET) {
                        if (ifp->if_flags & IFF_RUNNING)
                                error = wi_init(ifp);
                        else
                                error = 0;
                }
                break;
        case SIOCS80211BSSID:
                if (sc->sc_firmware_type == WI_LUCENT) {
                        error = ENODEV;
                        break;
                }
                /* fall through */
        default:
                ic->ic_flags |= sc->sc_ic_flags;
                error = ieee80211_ioctl(&sc->sc_ic, cmd, data);
                sc->sc_ic_flags = ic->ic_flags & IEEE80211_F_DROPUNENC;
                if (error == ENETRESET) {
                        if (sc->sc_enabled)
                                error = wi_init(ifp);
                        else
                                error = 0;
                }
                break;
        }
        wi_mend_flags(sc, ic->ic_state);
        wi_ioctl_exit(sc);
        splx(s);
        return error;
}

STATIC int
wi_media_change(struct ifnet *ifp)
{
        struct wi_softc *sc = ifp->if_softc;
        struct ieee80211com *ic = &sc->sc_ic;
        int error;

        error = ieee80211_media_change(ifp);
        if (error == ENETRESET) {
                if (sc->sc_enabled)
                        error = wi_init(ifp);
                else
                        error = 0;
        }
        ifp->if_baudrate = ifmedia_baudrate(ic->ic_media.ifm_cur->ifm_media);

        return error;
}

STATIC void
wi_media_status(struct ifnet *ifp, struct ifmediareq *imr)
{
        struct wi_softc *sc = ifp->if_softc;
        struct ieee80211com *ic = &sc->sc_ic;
        uint16_t val;
        int rate;

        if (sc->sc_enabled == 0) {
                imr->ifm_active = IFM_IEEE80211 | IFM_NONE;
                imr->ifm_status = 0;
                return;
        }

        imr->ifm_status = IFM_AVALID;
        imr->ifm_active = IFM_IEEE80211;
        if (ic->ic_state == IEEE80211_S_RUN &&
            (sc->sc_flags & WI_FLAGS_OUTRANGE) == 0)
                imr->ifm_status |= IFM_ACTIVE;
        if (wi_read_xrid(sc, WI_RID_CUR_TX_RATE, &val, sizeof(val)) == 0) {
                /* convert to 802.11 rate */
                val = le16toh(val);
                rate = val * 2;
                if (sc->sc_firmware_type == WI_LUCENT) {
                        if (rate == 10)
                                rate = 11;      /* 5.5Mbps */
                } else {
                        if (rate == 4*2)
                                rate = 11;      /* 5.5Mbps */
                        else if (rate == 8*2)
                                rate = 22;      /* 11Mbps */
                }
        } else
                rate = 0;
        imr->ifm_active |= ieee80211_rate2media(ic, rate, IEEE80211_MODE_11B);
        switch (ic->ic_opmode) {
        case IEEE80211_M_STA:
                break;
        case IEEE80211_M_IBSS:
                imr->ifm_active |= IFM_IEEE80211_ADHOC;
                break;
        case IEEE80211_M_AHDEMO:
                imr->ifm_active |= IFM_IEEE80211_ADHOC | IFM_FLAG0;
                break;
        case IEEE80211_M_HOSTAP:
                imr->ifm_active |= IFM_IEEE80211_HOSTAP;
                break;
        case IEEE80211_M_MONITOR:
                imr->ifm_active |= IFM_IEEE80211_MONITOR;
                break;
        }
}

STATIC struct ieee80211_node *
wi_node_alloc(struct ieee80211_node_table *nt)
{
        struct wi_node *wn =
            malloc(sizeof(struct wi_node), M_DEVBUF, M_NOWAIT | M_ZERO);
        return wn ? &wn->wn_node : NULL;
}

STATIC void
wi_node_free(struct ieee80211_node *ni)
{
        struct wi_softc *sc = ni->ni_ic->ic_ifp->if_softc;
        int i;

        for (i = 0; i < WI_NTXRSS; i++) {
                if (sc->sc_rssd[i].rd_desc.id_node == ni)
                        sc->sc_rssd[i].rd_desc.id_node = NULL;
        }
        free(ni, M_DEVBUF);
}

STATIC void
wi_sync_bssid(struct wi_softc *sc, uint8_t new_bssid[IEEE80211_ADDR_LEN])
{
        struct ieee80211com *ic = &sc->sc_ic;
        struct ieee80211_node *ni = ic->ic_bss;
        struct ifnet *ifp = &sc->sc_if;
        int s;

        if (IEEE80211_ADDR_EQ(new_bssid, ni->ni_bssid))
                return;

        DPRINTF(("wi_sync_bssid: bssid %s -> ", ether_sprintf(ni->ni_bssid)));
        DPRINTF(("%s ?\n", ether_sprintf(new_bssid)));

        /* In promiscuous mode, the BSSID field is not a reliable
         * indicator of the firmware's BSSID. Damp spurious
         * change-of-BSSID indications.
         */
        if ((ifp->if_flags & IFF_PROMISC) != 0 &&
            !ppsratecheck(&sc->sc_last_syn, &sc->sc_false_syns,
                         WI_MAX_FALSE_SYNS))
                return;

        sc->sc_false_syns = MAX(0, sc->sc_false_syns - 1);
        /*
         * XXX hack; we should create a new node with the new bssid
         * and replace the existing ic_bss with it but since we don't
         * process management frames to collect state we cheat by
         * reusing the existing node as we know wi_newstate will be
         * called and it will overwrite the node state.
         */
        s = splnet();
        ieee80211_sta_join(ic, ieee80211_ref_node(ni));
        splx(s);
}

static inline void
wi_rssadapt_input(struct ieee80211com *ic, struct ieee80211_node *ni,
    struct ieee80211_frame *wh, int rssi)
{
        struct wi_node *wn;

        if (ni == NULL) {
                printf("%s: null node", __func__);
                return;
        }

        wn = (void*)ni;
        ieee80211_rssadapt_input(ic, ni, &wn->wn_rssadapt, rssi);
}

STATIC void
wi_rx_intr(struct wi_softc *sc)
{
        struct ieee80211com *ic = &sc->sc_ic;
        struct ifnet *ifp = &sc->sc_if;
        struct ieee80211_node *ni;
        struct wi_frame frmhdr;
        struct mbuf *m;
        struct ieee80211_frame *wh;
        int fid, len, off, rssi;
        uint8_t dir;
        uint16_t status;
        uint32_t rstamp;
        int s;

        fid = CSR_READ_2(sc, WI_RX_FID);

        /* First read in the frame header */
        if (wi_read_bap(sc, fid, 0, &frmhdr, sizeof(frmhdr))) {
                aprint_error_dev(sc->sc_dev, "%s read fid %x failed\n",
                    __func__, fid);
                if_statinc(ifp, if_ierrors);
                return;
        }

        if (IFF_DUMPPKTS(ifp))
                wi_dump_pkt(&frmhdr, NULL, frmhdr.wi_rx_signal);

        /*
         * Drop undecryptable or packets with receive errors here
         */
        status = le16toh(frmhdr.wi_status);
        if ((status & WI_STAT_ERRSTAT) != 0 &&
            ic->ic_opmode != IEEE80211_M_MONITOR) {
                if_statinc(ifp, if_ierrors);
                DPRINTF(("wi_rx_intr: fid %x error status %x\n", fid, status));
                return;
        }
        rssi = frmhdr.wi_rx_signal;
        rstamp = (le16toh(frmhdr.wi_rx_tstamp0) << 16) |
            le16toh(frmhdr.wi_rx_tstamp1);

        len = le16toh(frmhdr.wi_dat_len);
        off = ALIGN(sizeof(struct ieee80211_frame));

        /* Sometimes the PRISM2.x returns bogusly large frames. Except
         * in monitor mode, just throw them away.
         */
        if (off + len > MCLBYTES) {
                if (ic->ic_opmode != IEEE80211_M_MONITOR) {
                        if_statinc(ifp, if_ierrors);
                        DPRINTF(("wi_rx_intr: oversized packet\n"));
                        return;
                } else
                        len = 0;
        }

        MGETHDR(m, M_DONTWAIT, MT_DATA);
        if (m == NULL) {
                if_statinc(ifp, if_ierrors);
                DPRINTF(("wi_rx_intr: MGET failed\n"));
                return;
        }
        if (off + len > MHLEN) {
                MCLGET(m, M_DONTWAIT);
                if ((m->m_flags & M_EXT) == 0) {
                        m_freem(m);
                        if_statinc(ifp, if_ierrors);
                        DPRINTF(("wi_rx_intr: MCLGET failed\n"));
                        return;
                }
        }

        m->m_data += off - sizeof(struct ieee80211_frame);
        memcpy(m->m_data, &frmhdr.wi_whdr, sizeof(struct ieee80211_frame));
        wi_read_bap(sc, fid, sizeof(frmhdr),
            m->m_data + sizeof(struct ieee80211_frame), len);
        m->m_pkthdr.len = m->m_len = sizeof(struct ieee80211_frame) + len;
        m_set_rcvif(m, ifp);

        wh = mtod(m, struct ieee80211_frame *);
        if (wh->i_fc[1] & IEEE80211_FC1_WEP) {
                /*
                 * WEP is decrypted by hardware. Clear WEP bit
                 * header for ieee80211_input().
                 */
                wh->i_fc[1] &= ~IEEE80211_FC1_WEP;
        }

        s = splnet();

        if (sc->sc_drvbpf) {
                struct wi_rx_radiotap_header *tap = &sc->sc_rxtap;

                tap->wr_rate = frmhdr.wi_rx_rate / 5;
                tap->wr_antsignal = frmhdr.wi_rx_signal;
                tap->wr_antnoise = frmhdr.wi_rx_silence;
                tap->wr_chan_freq = htole16(ic->ic_bss->ni_chan->ic_freq);
                tap->wr_chan_flags = htole16(ic->ic_bss->ni_chan->ic_flags);
                if (frmhdr.wi_status & WI_STAT_PCF)
                        tap->wr_flags |= IEEE80211_RADIOTAP_F_CFP;

                /* XXX IEEE80211_RADIOTAP_F_WEP */
                bpf_mtap2(sc->sc_drvbpf, tap, tap->wr_ihdr.it_len, m,
                    BPF_D_IN);
        }

        /* synchronize driver's BSSID with firmware's BSSID */
        dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK;
        if (ic->ic_opmode == IEEE80211_M_IBSS && dir == IEEE80211_FC1_DIR_NODS)
                wi_sync_bssid(sc, wh->i_addr3);

        ni = ieee80211_find_rxnode(ic, mtod(m, struct ieee80211_frame_min *));

        ieee80211_input(ic, m, ni, rssi, rstamp);

        wi_rssadapt_input(ic, ni, wh, rssi);

        /*
         * The frame may have caused the node to be marked for
         * reclamation (e.g. in response to a DEAUTH message)
         * so use release_node here instead of unref_node.
         */
        ieee80211_free_node(ni);

        splx(s);
}

STATIC void
wi_tx_ex_intr(struct wi_softc *sc)
{
        struct ieee80211com *ic = &sc->sc_ic;
        struct ifnet *ifp = &sc->sc_if;
        struct ieee80211_node *ni;
        struct ieee80211_rssdesc *id;
        struct wi_rssdesc *rssd;
        struct wi_frame frmhdr;
        int fid, s;
        uint16_t status;

        s = splnet();

        fid = CSR_READ_2(sc, WI_TX_CMP_FID);
        /* Read in the frame header */
        if (wi_read_bap(sc, fid, 0, &frmhdr, sizeof(frmhdr)) != 0) {
                aprint_error_dev(sc->sc_dev, "%s read fid %x failed\n",
                    __func__, fid);
                wi_rssdescs_reset(ic, &sc->sc_rssd, &sc->sc_rssdfree,
                    &sc->sc_txpending);
                goto out;
        }

        if (frmhdr.wi_tx_idx >= WI_NTXRSS) {
                aprint_error_dev(sc->sc_dev, "%s bad idx %02x\n",
                    __func__, frmhdr.wi_tx_idx);
                wi_rssdescs_reset(ic, &sc->sc_rssd, &sc->sc_rssdfree,
                    &sc->sc_txpending);
                goto out;
        }

        status = le16toh(frmhdr.wi_status);

        /*
         * Spontaneous station disconnects appear as xmit
         * errors.  Don't announce them and/or count them
         * as an output error.
         */
        if (ppsratecheck(&lasttxerror, &curtxeps, wi_txerate)) {
                aprint_error_dev(sc->sc_dev, "tx failed");
                if (status & WI_TXSTAT_RET_ERR)
                        printf(", retry limit exceeded");
                if (status & WI_TXSTAT_AGED_ERR)
                        printf(", max transmit lifetime exceeded");
                if (status & WI_TXSTAT_DISCONNECT)
                        printf(", port disconnected");
                if (status & WI_TXSTAT_FORM_ERR)
                        printf(", invalid format (data len %u src %s)",
                                le16toh(frmhdr.wi_dat_len),
                                ether_sprintf(frmhdr.wi_ehdr.ether_shost));
                if (status & ~0xf)
                        printf(", status=0x%x", status);
                printf("\n");
        }
        if_statinc(ifp, if_oerrors);
        rssd = &sc->sc_rssd[frmhdr.wi_tx_idx];
        id = &rssd->rd_desc;
        if ((status & WI_TXSTAT_RET_ERR) != 0)
                wi_lower_rate(ic, id);

        ni = id->id_node;
        id->id_node = NULL;

        if (ni == NULL) {
                aprint_error_dev(sc->sc_dev, "%s null node, rssdesc %02x\n",
                    __func__, frmhdr.wi_tx_idx);
                goto out;
        }

        if (sc->sc_txpending[id->id_rateidx]-- == 0) {
                aprint_error_dev(sc->sc_dev, "%s txpending[%i] wraparound",
                    __func__, id->id_rateidx);
                sc->sc_txpending[id->id_rateidx] = 0;
        }
        if (ni != NULL)
                ieee80211_free_node(ni);
        SLIST_INSERT_HEAD(&sc->sc_rssdfree, rssd, rd_next);
out:
        ifp->if_flags &= ~IFF_OACTIVE;
        splx(s);
}

STATIC void
wi_txalloc_intr(struct wi_softc *sc)
{
        int fid, cur, s;

        s = splnet();

        fid = CSR_READ_2(sc, WI_ALLOC_FID);

        cur = sc->sc_txalloc;
#ifdef DIAGNOSTIC
        if (sc->sc_txstarted == 0) {
                printf("%s: spurious alloc %x != %x, alloc %d queue %d start %d alloced %d queued %d started %d\n",
                    device_xname(sc->sc_dev), fid, sc->sc_txd[cur].d_fid, cur,
                    sc->sc_txqueue, sc->sc_txstart, sc->sc_txalloced, sc->sc_txqueued, sc->sc_txstarted);
                splx(s);
                return;
        }
#endif
        --sc->sc_txstarted;
        ++sc->sc_txalloced;
        sc->sc_txd[cur].d_fid = fid;
        sc->sc_txalloc = (cur + 1) % WI_NTXBUF;
#ifdef WI_RING_DEBUG
        printf("%s: alloc %04x, alloc %d queue %d start %d alloced %d queued %d started %d\n",
            device_xname(sc->sc_dev), fid,
            sc->sc_txalloc, sc->sc_txqueue, sc->sc_txstart,
            sc->sc_txalloced, sc->sc_txqueued, sc->sc_txstarted);
#endif
        splx(s);
}

STATIC void
wi_cmd_intr(struct wi_softc *sc)
{
        struct ifnet *ifp = &sc->sc_if;
        int s;

        if (sc->sc_invalid)
                return;

        s = splnet();
#ifdef WI_DEBUG
        if (wi_debug > 1)
                printf("%s: %d txcmds outstanding\n", __func__, sc->sc_txcmds);
#endif
        KASSERT(sc->sc_txcmds > 0);

        --sc->sc_txcmds;

        if (--sc->sc_txqueued == 0) {
                sc->sc_tx_timer = 0;
                ifp->if_flags &= ~IFF_OACTIVE;
#ifdef WI_RING_DEBUG
        printf("%s: cmd       , alloc %d queue %d start %d alloced %d queued %d started %d\n",
            device_xname(sc->sc_dev),
            sc->sc_txalloc, sc->sc_txqueue, sc->sc_txstart,
            sc->sc_txalloced, sc->sc_txqueued, sc->sc_txstarted);
#endif
        } else
                wi_push_packet(sc);
        splx(s);
}

STATIC void
wi_push_packet(struct wi_softc *sc)
{
        struct ifnet *ifp = &sc->sc_if;
        int cur, fid;

        cur = sc->sc_txstart;
        fid = sc->sc_txd[cur].d_fid;

        KASSERT(sc->sc_txcmds == 0);

        if (wi_cmd_start(sc, WI_CMD_TX | WI_RECLAIM, fid, 0, 0)) {
                aprint_error_dev(sc->sc_dev, "xmit failed\n");
                /* XXX ring might have a hole */
        }

        if (sc->sc_txcmds++ > 0)
                printf("%s: %d tx cmds pending!!!\n", __func__, sc->sc_txcmds);

        ++sc->sc_txstarted;
#ifdef DIAGNOSTIC
        if (sc->sc_txstarted > WI_NTXBUF)
                aprint_error_dev(sc->sc_dev, "too many buffers started\n");
#endif
        sc->sc_txstart = (cur + 1) % WI_NTXBUF;
        sc->sc_tx_timer = 5;
        ifp->if_timer = 1;
#ifdef WI_RING_DEBUG
        printf("%s: push  %04x, alloc %d queue %d start %d alloced %d queued %d started %d\n",
            device_xname(sc->sc_dev), fid,
            sc->sc_txalloc, sc->sc_txqueue, sc->sc_txstart,
            sc->sc_txalloced, sc->sc_txqueued, sc->sc_txstarted);
#endif
}

STATIC void
wi_tx_intr(struct wi_softc *sc)
{
        struct ieee80211com *ic = &sc->sc_ic;
        struct ifnet *ifp = &sc->sc_if;
        struct ieee80211_node *ni;
        struct ieee80211_rssdesc *id;
        struct wi_rssdesc *rssd;
        struct wi_frame frmhdr;
        int fid, s;

        s = splnet();

        fid = CSR_READ_2(sc, WI_TX_CMP_FID);
        /* Read in the frame header */
        if (wi_read_bap(sc, fid, offsetof(struct wi_frame, wi_tx_swsup2),
                        &frmhdr.wi_tx_swsup2, 2) != 0) {
                aprint_error_dev(sc->sc_dev, "%s read fid %x failed\n",
                    __func__, fid);
                wi_rssdescs_reset(ic, &sc->sc_rssd, &sc->sc_rssdfree,
                    &sc->sc_txpending);
                goto out;
        }

        if (frmhdr.wi_tx_idx >= WI_NTXRSS) {
                aprint_error_dev(sc->sc_dev, "%s bad idx %02x\n",
                    __func__, frmhdr.wi_tx_idx);
                wi_rssdescs_reset(ic, &sc->sc_rssd, &sc->sc_rssdfree,
                    &sc->sc_txpending);
                goto out;
        }

        rssd = &sc->sc_rssd[frmhdr.wi_tx_idx];
        id = &rssd->rd_desc;
        wi_raise_rate(ic, id);

        ni = id->id_node;
        id->id_node = NULL;

        if (ni == NULL) {
                aprint_error_dev(sc->sc_dev, "%s null node, rssdesc %02x\n",
                    __func__, frmhdr.wi_tx_idx);
                goto out;
        }

        if (sc->sc_txpending[id->id_rateidx]-- == 0) {
                aprint_error_dev(sc->sc_dev, "%s txpending[%i] wraparound",
                    __func__, id->id_rateidx);
                sc->sc_txpending[id->id_rateidx] = 0;
        }
        if (ni != NULL)
                ieee80211_free_node(ni);
        SLIST_INSERT_HEAD(&sc->sc_rssdfree, rssd, rd_next);
out:
        ifp->if_flags &= ~IFF_OACTIVE;
        splx(s);
}

STATIC void
wi_info_intr(struct wi_softc *sc)
{
        struct ieee80211com *ic = &sc->sc_ic;
        struct ifnet *ifp = &sc->sc_if;
        int i, s, fid, len, off;
        uint16_t ltbuf[2];
        uint16_t stat;
        uint32_t *ptr;

        fid = CSR_READ_2(sc, WI_INFO_FID);
        wi_read_bap(sc, fid, 0, ltbuf, sizeof(ltbuf));

        switch (le16toh(ltbuf[1])) {

        case WI_INFO_LINK_STAT:
                wi_read_bap(sc, fid, sizeof(ltbuf), &stat, sizeof(stat));
                DPRINTF(("wi_info_intr: LINK_STAT 0x%x\n", le16toh(stat)));
                switch (le16toh(stat)) {
                case CONNECTED:
                        sc->sc_flags &= ~WI_FLAGS_OUTRANGE;
                        if (ic->ic_state == IEEE80211_S_RUN &&
                            ic->ic_opmode != IEEE80211_M_IBSS)
                                break;
                        /* FALLTHROUGH */
                case AP_CHANGE:
                        s = splnet();
                        ieee80211_new_state(ic, IEEE80211_S_RUN, -1);
                        splx(s);
                        break;
                case AP_IN_RANGE:
                        sc->sc_flags &= ~WI_FLAGS_OUTRANGE;
                        break;
                case AP_OUT_OF_RANGE:
                        if (sc->sc_firmware_type == WI_SYMBOL &&
                            sc->sc_scan_timer > 0) {
                                if (wi_cmd(sc, WI_CMD_INQUIRE,
                                    WI_INFO_HOST_SCAN_RESULTS, 0, 0) != 0)
                                        sc->sc_scan_timer = 0;
                                break;
                        }
                        if (ic->ic_opmode == IEEE80211_M_STA)
                                sc->sc_flags |= WI_FLAGS_OUTRANGE;
                        break;
                case DISCONNECTED:
                case ASSOC_FAILED:
                        s = splnet();
                        if (ic->ic_opmode == IEEE80211_M_STA)
                                ieee80211_new_state(ic, IEEE80211_S_INIT, -1);
                        splx(s);
                        break;
                }
                break;

        case WI_INFO_COUNTERS:
                /* some card versions have a larger stats structure */
                len = uimin(le16toh(ltbuf[0]) - 1, sizeof(sc->sc_stats) / 4);
                ptr = (uint32_t *)&sc->sc_stats;
                off = sizeof(ltbuf);
                for (i = 0; i < len; i++, off += 2, ptr++) {
                        wi_read_bap(sc, fid, off, &stat, sizeof(stat));
                        stat = le16toh(stat);
#ifdef WI_HERMES_STATS_WAR
                        if (stat & 0xf000)
                                stat = ~stat;
#endif
                        *ptr += stat;
                }
                if_statadd(ifp, if_collisions,
                    sc->sc_stats.wi_tx_single_retries +
                    sc->sc_stats.wi_tx_multi_retries +
                    sc->sc_stats.wi_tx_retry_limit);
                break;

        case WI_INFO_SCAN_RESULTS:
        case WI_INFO_HOST_SCAN_RESULTS:
                wi_scan_result(sc, fid, le16toh(ltbuf[0]));
                break;

        default:
                DPRINTF(("wi_info_intr: got fid %x type %x len %d\n", fid,
                    le16toh(ltbuf[1]), le16toh(ltbuf[0])));
                break;
        }
}

STATIC int
wi_write_multi(struct wi_softc *sc)
{
        struct ethercom *ec = &sc->sc_ec;
        struct ifnet *ifp = &sc->sc_if;
        int n;
        struct wi_mcast mlist;
        struct ether_multi *enm;
        struct ether_multistep estep;

        if ((ifp->if_flags & IFF_PROMISC) != 0) {
allmulti:
                ifp->if_flags |= IFF_ALLMULTI;
                memset(&mlist, 0, sizeof(mlist));
                return wi_write_rid(sc, WI_RID_MCAST_LIST, &mlist,
                    sizeof(mlist));
        }

        n = 0;
        ETHER_LOCK(ec);
        ETHER_FIRST_MULTI(estep, ec, enm);
        while (enm != NULL) {
                /* Punt on ranges or too many multicast addresses. */
                if (!IEEE80211_ADDR_EQ(enm->enm_addrlo, enm->enm_addrhi) ||
                    n >= sizeof(mlist) / sizeof(mlist.wi_mcast[0])) {
                        ETHER_UNLOCK(ec);
                        goto allmulti;
                }

                IEEE80211_ADDR_COPY(&mlist.wi_mcast[n], enm->enm_addrlo);
                n++;
                ETHER_NEXT_MULTI(estep, enm);
        }
        ETHER_UNLOCK(ec);
        ifp->if_flags &= ~IFF_ALLMULTI;
        return wi_write_rid(sc, WI_RID_MCAST_LIST, &mlist,
            IEEE80211_ADDR_LEN * n);
}


STATIC void
wi_read_nicid(struct wi_softc *sc)
{
        const struct wi_card_ident *id;
        char *p;
        int len;
        uint16_t ver[4];

        /* getting chip identity */
        memset(ver, 0, sizeof(ver));
        len = sizeof(ver);
        wi_read_rid(sc, WI_RID_CARD_ID, ver, &len);
        printf("%s: using ", device_xname(sc->sc_dev));
DPRINTF2(("wi_read_nicid: CARD_ID: %x %x %x %x\n", le16toh(ver[0]), le16toh(ver[1]), le16toh(ver[2]), le16toh(ver[3])));

        sc->sc_firmware_type = WI_NOTYPE;
        for (id = wi_card_ident; id->card_name != NULL; id++) {
                if (le16toh(ver[0]) == id->card_id) {
                        printf("%s", id->card_name);
                        sc->sc_firmware_type = id->firm_type;
                        break;
                }
        }
        if (sc->sc_firmware_type == WI_NOTYPE) {
                if (le16toh(ver[0]) & 0x8000) {
                        printf("Unknown PRISM2 chip");
                        sc->sc_firmware_type = WI_INTERSIL;
                } else {
                        printf("Unknown Lucent chip");
                        sc->sc_firmware_type = WI_LUCENT;
                }
        }

        /* get primary firmware version (Only Prism chips) */
        if (sc->sc_firmware_type != WI_LUCENT) {
                memset(ver, 0, sizeof(ver));
                len = sizeof(ver);
                wi_read_rid(sc, WI_RID_PRI_IDENTITY, ver, &len);
                sc->sc_pri_firmware_ver = le16toh(ver[2]) * 10000 +
                    le16toh(ver[3]) * 100 + le16toh(ver[1]);
        }

        /* get station firmware version */
        memset(ver, 0, sizeof(ver));
        len = sizeof(ver);
        wi_read_rid(sc, WI_RID_STA_IDENTITY, ver, &len);
        sc->sc_sta_firmware_ver = le16toh(ver[2]) * 10000 +
            le16toh(ver[3]) * 100 + le16toh(ver[1]);
        if (sc->sc_firmware_type == WI_INTERSIL &&
            (sc->sc_sta_firmware_ver == 10102 ||
             sc->sc_sta_firmware_ver == 20102)) {
                char ident[12];
                memset(ident, 0, sizeof(ident));
                len = sizeof(ident);
                /* value should be the format like "V2.00-11" */
                if (wi_read_rid(sc, WI_RID_SYMBOL_IDENTITY, ident, &len) == 0 &&
                    *(p = (char *)ident) >= 'A' &&
                    p[2] == '.' && p[5] == '-' && p[8] == '\0') {
                        sc->sc_firmware_type = WI_SYMBOL;
                        sc->sc_sta_firmware_ver = (p[1] - '0') * 10000 +
                            (p[3] - '0') * 1000 + (p[4] - '0') * 100 +
                            (p[6] - '0') * 10 + (p[7] - '0');
                }
        }

        printf("\n%s: %s Firmware: ", device_xname(sc->sc_dev),
             sc->sc_firmware_type == WI_LUCENT ? "Lucent" :
            (sc->sc_firmware_type == WI_SYMBOL ? "Symbol" : "Intersil"));
        if (sc->sc_firmware_type != WI_LUCENT)  /* XXX */
                printf("Primary (%u.%u.%u), ",
                    sc->sc_pri_firmware_ver / 10000,
                    (sc->sc_pri_firmware_ver % 10000) / 100,
                    sc->sc_pri_firmware_ver % 100);
        printf("Station (%u.%u.%u)\n",
            sc->sc_sta_firmware_ver / 10000,
            (sc->sc_sta_firmware_ver % 10000) / 100,
            sc->sc_sta_firmware_ver % 100);
}

STATIC int
wi_write_ssid(struct wi_softc *sc, int rid, uint8_t *buf, int buflen)
{
        struct wi_ssid ssid;

        if (buflen > IEEE80211_NWID_LEN)
                return ENOBUFS;
        memset(&ssid, 0, sizeof(ssid));
        ssid.wi_len = htole16(buflen);
        memcpy(ssid.wi_ssid, buf, buflen);
        return wi_write_rid(sc, rid, &ssid, sizeof(ssid));
}

STATIC int
wi_get_cfg(struct ifnet *ifp, u_long cmd, void *data)
{
        struct wi_softc *sc = ifp->if_softc;
        struct ieee80211com *ic = &sc->sc_ic;
        struct ifreq *ifr = (struct ifreq *)data;
        struct wi_req wreq;
        int len, n, error;

        error = copyin(ifr->ifr_data, &wreq, sizeof(wreq));
        if (error)
                return error;
        len = (wreq.wi_len - 1) * 2;
        if (len < sizeof(uint16_t))
                return ENOSPC;
        if (len > sizeof(wreq.wi_val))
                len = sizeof(wreq.wi_val);

        switch (wreq.wi_type) {

        case WI_RID_IFACE_STATS:
                memcpy(wreq.wi_val, &sc->sc_stats, sizeof(sc->sc_stats));
                if (len < sizeof(sc->sc_stats))
                        error = ENOSPC;
                else
                        len = sizeof(sc->sc_stats);
                break;

        case WI_RID_ENCRYPTION:
        case WI_RID_TX_CRYPT_KEY:
        case WI_RID_DEFLT_CRYPT_KEYS:
        case WI_RID_TX_RATE:
                return ieee80211_cfgget(ic, cmd, data);

        case WI_RID_MICROWAVE_OVEN:
                if (sc->sc_enabled && (sc->sc_flags & WI_FLAGS_HAS_MOR)) {
                        error = wi_read_rid(sc, wreq.wi_type, wreq.wi_val,
                            &len);
                        break;
                }
                wreq.wi_val[0] = htole16(sc->sc_microwave_oven);
                len = sizeof(uint16_t);
                break;

        case WI_RID_DBM_ADJUST:
                if (sc->sc_enabled && (sc->sc_flags & WI_FLAGS_HAS_DBMADJUST)) {
                        error = wi_read_rid(sc, wreq.wi_type, wreq.wi_val,
                            &len);
                        break;
                }
                wreq.wi_val[0] = htole16(sc->sc_dbm_offset);
                len = sizeof(uint16_t);
                break;

        case WI_RID_ROAMING_MODE:
                if (sc->sc_enabled && (sc->sc_flags & WI_FLAGS_HAS_ROAMING)) {
                        error = wi_read_rid(sc, wreq.wi_type, wreq.wi_val,
                            &len);
                        break;
                }
                wreq.wi_val[0] = htole16(sc->sc_roaming_mode);
                len = sizeof(uint16_t);
                break;

        case WI_RID_SYSTEM_SCALE:
                if (sc->sc_enabled && (sc->sc_flags & WI_FLAGS_HAS_SYSSCALE)) {
                        error = wi_read_rid(sc, wreq.wi_type, wreq.wi_val,
                            &len);
                        break;
                }
                wreq.wi_val[0] = htole16(sc->sc_system_scale);
                len = sizeof(uint16_t);
                break;

        case WI_RID_FRAG_THRESH:
                if (sc->sc_enabled && (sc->sc_flags & WI_FLAGS_HAS_FRAGTHR)) {
                        error = wi_read_rid(sc, wreq.wi_type, wreq.wi_val,
                            &len);
                        break;
                }
                wreq.wi_val[0] = htole16(sc->sc_frag_thresh);
                len = sizeof(uint16_t);
                break;

        case WI_RID_READ_APS:
#ifndef IEEE80211_NO_HOSTAP
                if (ic->ic_opmode == IEEE80211_M_HOSTAP)
                        return ieee80211_cfgget(ic, cmd, data);
#endif /* !IEEE80211_NO_HOSTAP */
                if (sc->sc_scan_timer > 0) {
                        error = EINPROGRESS;
                        break;
                }
                n = sc->sc_naps;
                if (len < sizeof(n)) {
                        error = ENOSPC;
                        break;
                }
                if (len < sizeof(n) + sizeof(struct wi_apinfo) * n)
                        n = (len - sizeof(n)) / sizeof(struct wi_apinfo);
                len = sizeof(n) + sizeof(struct wi_apinfo) * n;
                memcpy(wreq.wi_val, &n, sizeof(n));
                memcpy((char *)wreq.wi_val + sizeof(n), sc->sc_aps,
                    sizeof(struct wi_apinfo) * n);
                break;

        default:
                if (sc->sc_enabled) {
                        error = wi_read_rid(sc, wreq.wi_type, wreq.wi_val,
                            &len);
                        break;
                }
                switch (wreq.wi_type) {
                case WI_RID_MAX_DATALEN:
                        wreq.wi_val[0] = htole16(sc->sc_max_datalen);
                        len = sizeof(uint16_t);
                        break;
                case WI_RID_FRAG_THRESH:
                        wreq.wi_val[0] = htole16(sc->sc_frag_thresh);
                        len = sizeof(uint16_t);
                        break;
                case WI_RID_RTS_THRESH:
                        wreq.wi_val[0] = htole16(sc->sc_rts_thresh);
                        len = sizeof(uint16_t);
                        break;
                case WI_RID_CNFAUTHMODE:
                        wreq.wi_val[0] = htole16(sc->sc_cnfauthmode);
                        len = sizeof(uint16_t);
                        break;
                case WI_RID_NODENAME:
                        if (len < sc->sc_nodelen + sizeof(uint16_t)) {
                                error = ENOSPC;
                                break;
                        }
                        len = sc->sc_nodelen + sizeof(uint16_t);
                        wreq.wi_val[0] = htole16((sc->sc_nodelen + 1) / 2);
                        memcpy(&wreq.wi_val[1], sc->sc_nodename,
                            sc->sc_nodelen);
                        break;
                default:
                        return ieee80211_cfgget(ic, cmd, data);
                }
                break;
        }
        if (error)
                return error;
        wreq.wi_len = (len + 1) / 2 + 1;
        return copyout(&wreq, ifr->ifr_data, (wreq.wi_len + 1) * 2);
}

STATIC int
wi_set_cfg(struct ifnet *ifp, u_long cmd, void *data)
{
        struct wi_softc *sc = ifp->if_softc;
        struct ieee80211com *ic = &sc->sc_ic;
        struct ifreq *ifr = (struct ifreq *)data;
        struct ieee80211_rateset *rs = &ic->ic_sup_rates[IEEE80211_MODE_11B];
        struct wi_req wreq;
        struct mbuf *m;
        int i, len, error;

        error = copyin(ifr->ifr_data, &wreq, sizeof(wreq));
        if (error)
                return error;
        len = (wreq.wi_len - 1) * 2;
        switch (wreq.wi_type) {
        case WI_RID_MAC_NODE:
                /* XXX convert to SIOCALIFADDR, AF_LINK, IFLR_ACTIVE */
                (void)memcpy(ic->ic_myaddr, wreq.wi_val, ETHER_ADDR_LEN);
                if_set_sadl(ifp, ic->ic_myaddr, ETHER_ADDR_LEN, false);
                wi_write_rid(sc, WI_RID_MAC_NODE, ic->ic_myaddr,
                    IEEE80211_ADDR_LEN);
                break;

        case WI_RID_DBM_ADJUST:
                return ENODEV;

        case WI_RID_NODENAME:
                if (le16toh(wreq.wi_val[0]) * 2 > len ||
                    le16toh(wreq.wi_val[0]) > sizeof(sc->sc_nodename)) {
                        error = ENOSPC;
                        break;
                }
                if (sc->sc_enabled) {
                        error = wi_write_rid(sc, wreq.wi_type, wreq.wi_val,
                            len);
                        if (error)
                                break;
                }
                sc->sc_nodelen = le16toh(wreq.wi_val[0]) * 2;
                memcpy(sc->sc_nodename, &wreq.wi_val[1], sc->sc_nodelen);
                break;

        case WI_RID_MICROWAVE_OVEN:
        case WI_RID_ROAMING_MODE:
        case WI_RID_SYSTEM_SCALE:
        case WI_RID_FRAG_THRESH:
                if (wreq.wi_type == WI_RID_MICROWAVE_OVEN &&
                    (sc->sc_flags & WI_FLAGS_HAS_MOR) == 0)
                        break;
                if (wreq.wi_type == WI_RID_ROAMING_MODE &&
                    (sc->sc_flags & WI_FLAGS_HAS_ROAMING) == 0)
                        break;
                if (wreq.wi_type == WI_RID_SYSTEM_SCALE &&
                    (sc->sc_flags & WI_FLAGS_HAS_SYSSCALE) == 0)
                        break;
                if (wreq.wi_type == WI_RID_FRAG_THRESH &&
                    (sc->sc_flags & WI_FLAGS_HAS_FRAGTHR) == 0)
                        break;
                /* FALLTHROUGH */
        case WI_RID_RTS_THRESH:
        case WI_RID_CNFAUTHMODE:
        case WI_RID_MAX_DATALEN:
                if (sc->sc_enabled) {
                        error = wi_write_rid(sc, wreq.wi_type, wreq.wi_val,
                            sizeof(uint16_t));
                        if (error)
                                break;
                }
                switch (wreq.wi_type) {
                case WI_RID_FRAG_THRESH:
                        sc->sc_frag_thresh = le16toh(wreq.wi_val[0]);
                        break;
                case WI_RID_RTS_THRESH:
                        sc->sc_rts_thresh = le16toh(wreq.wi_val[0]);
                        break;
                case WI_RID_MICROWAVE_OVEN:
                        sc->sc_microwave_oven = le16toh(wreq.wi_val[0]);
                        break;
                case WI_RID_ROAMING_MODE:
                        sc->sc_roaming_mode = le16toh(wreq.wi_val[0]);
                        break;
                case WI_RID_SYSTEM_SCALE:
                        sc->sc_system_scale = le16toh(wreq.wi_val[0]);
                        break;
                case WI_RID_CNFAUTHMODE:
                        sc->sc_cnfauthmode = le16toh(wreq.wi_val[0]);
                        break;
                case WI_RID_MAX_DATALEN:
                        sc->sc_max_datalen = le16toh(wreq.wi_val[0]);
                        break;
                }
                break;

        case WI_RID_TX_RATE:
                switch (le16toh(wreq.wi_val[0])) {
                case 3:
                        ic->ic_fixed_rate = -1;
                        break;
                default:
                        for (i = 0; i < IEEE80211_RATE_SIZE; i++) {
                                if ((rs->rs_rates[i] & IEEE80211_RATE_VAL)
                                    / 2 == le16toh(wreq.wi_val[0]))
                                        break;
                        }
                        if (i == IEEE80211_RATE_SIZE)
                                return EINVAL;
                        ic->ic_fixed_rate = i;
                }
                if (sc->sc_enabled)
                        error = wi_cfg_txrate(sc);
                break;

        case WI_RID_SCAN_APS:
                if (sc->sc_enabled && ic->ic_opmode != IEEE80211_M_HOSTAP)
                        error = wi_scan_ap(sc, 0x3fff, 0x000f);
                break;

        case WI_RID_MGMT_XMIT:
                if (!sc->sc_enabled) {
                        error = ENETDOWN;
                        break;
                }
                if (ic->ic_mgtq.ifq_len > 5) {
                        error = EAGAIN;
                        break;
                }
                /* XXX wi_len looks in uint8_t, not in uint16_t */
                m = m_devget((char *)&wreq.wi_val, wreq.wi_len, 0, ifp);
                if (m == NULL) {
                        error = ENOMEM;
                        break;
                }
                IF_ENQUEUE(&ic->ic_mgtq, m);
                break;

        default:
                if (sc->sc_enabled) {
                        error = wi_write_rid(sc, wreq.wi_type, wreq.wi_val,
                            len);
                        if (error)
                                break;
                }
                error = ieee80211_cfgset(ic, cmd, data);
                break;
        }
        return error;
}

/* Rate is 0 for hardware auto-select, otherwise rate is
 * 2, 4, 11, or 22 (units of 500Kbps).
 */
STATIC int
wi_write_txrate(struct wi_softc *sc, int rate)
{
        uint16_t hwrate;

        /* rate: 0, 2, 4, 11, 22 */
        switch (sc->sc_firmware_type) {
        case WI_LUCENT:
                switch (rate & IEEE80211_RATE_VAL) {
                case 2:
                        hwrate = 1;
                        break;
                case 4:
                        hwrate = 2;
                        break;
                default:
                        hwrate = 3;     /* auto */
                        break;
                case 11:
                        hwrate = 4;
                        break;
                case 22:
                        hwrate = 5;
                        break;
                }
                break;
        default:
                switch (rate & IEEE80211_RATE_VAL) {
                case 2:
                        hwrate = 1;
                        break;
                case 4:
                        hwrate = 2;
                        break;
                case 11:
                        hwrate = 4;
                        break;
                case 22:
                        hwrate = 8;
                        break;
                default:
                        hwrate = 15;    /* auto */
                        break;
                }
                break;
        }

        if (sc->sc_tx_rate == hwrate)
                return 0;

        if (sc->sc_if.if_flags & IFF_DEBUG)
                printf("%s: tx rate %d -> %d (%d)\n", __func__, sc->sc_tx_rate,
                    hwrate, rate);

        sc->sc_tx_rate = hwrate;

        return wi_write_val(sc, WI_RID_TX_RATE, sc->sc_tx_rate);
}

STATIC int
wi_cfg_txrate(struct wi_softc *sc)
{
        struct ieee80211com *ic = &sc->sc_ic;
        struct ieee80211_rateset *rs;
        int rate;

        rs = &ic->ic_sup_rates[IEEE80211_MODE_11B];

        sc->sc_tx_rate = 0; /* force write to RID */

        if (ic->ic_fixed_rate < 0)
                rate = 0;       /* auto */
        else
                rate = rs->rs_rates[ic->ic_fixed_rate];

        return wi_write_txrate(sc, rate);
}

STATIC int
wi_key_delete(struct ieee80211com *ic, const struct ieee80211_key *k)
{
        struct wi_softc *sc = ic->ic_ifp->if_softc;
        u_int keyix = k->wk_keyix;

        DPRINTF(("%s: delete key %u\n", __func__, keyix));

        if (keyix >= IEEE80211_WEP_NKID)
                return 0;
        if (k->wk_keylen != 0)
                sc->sc_flags &= ~WI_FLAGS_WEP_VALID;

        return 1;
}

static int
wi_key_set(struct ieee80211com *ic, const struct ieee80211_key *k,
        const uint8_t mac[IEEE80211_ADDR_LEN])
{
        struct wi_softc *sc = ic->ic_ifp->if_softc;

        DPRINTF(("%s: set key %u\n", __func__, k->wk_keyix));

        if (k->wk_keyix >= IEEE80211_WEP_NKID)
                return 0;

        sc->sc_flags &= ~WI_FLAGS_WEP_VALID;

        return 1;
}

STATIC void
wi_key_update_begin(struct ieee80211com *ic)
{
        DPRINTF(("%s:\n", __func__));
}

STATIC void
wi_key_update_end(struct ieee80211com *ic)
{
        struct ifnet *ifp = ic->ic_ifp;
        struct wi_softc *sc = ifp->if_softc;

        DPRINTF(("%s:\n", __func__));

        if ((sc->sc_flags & WI_FLAGS_WEP_VALID) != 0)
                return;
        if ((ic->ic_caps & IEEE80211_C_WEP) != 0 && sc->sc_enabled &&
            !sc->sc_invalid)
                (void)wi_write_wep(sc);
}

STATIC int
wi_write_wep(struct wi_softc *sc)
{
        struct ifnet *ifp = &sc->sc_if;
        struct ieee80211com *ic = &sc->sc_ic;
        int error = 0;
        int i, keylen;
        uint16_t val;
        struct wi_key wkey[IEEE80211_WEP_NKID];

        if ((ifp->if_flags & IFF_RUNNING) != 0)
                wi_cmd(sc, WI_CMD_DISABLE | sc->sc_portnum, 0, 0, 0);

        switch (sc->sc_firmware_type) {
        case WI_LUCENT:
                val = (ic->ic_flags & IEEE80211_F_PRIVACY) ? 1 : 0;
                error = wi_write_val(sc, WI_RID_ENCRYPTION, val);
                if (error)
                        break;
                error = wi_write_val(sc, WI_RID_TX_CRYPT_KEY, ic->ic_def_txkey);
                if (error)
                        break;
                memset(wkey, 0, sizeof(wkey));
                for (i = 0; i < IEEE80211_WEP_NKID; i++) {
                        keylen = ic->ic_nw_keys[i].wk_keylen;
                        wkey[i].wi_keylen = htole16(keylen);
                        memcpy(wkey[i].wi_keydat, ic->ic_nw_keys[i].wk_key,
                            keylen);
                }
                error = wi_write_rid(sc, WI_RID_DEFLT_CRYPT_KEYS,
                    wkey, sizeof(wkey));
                break;

        case WI_INTERSIL:
        case WI_SYMBOL:
                if (ic->ic_flags & IEEE80211_F_PRIVACY) {
                        /*
                         * ONLY HWB3163 EVAL-CARD Firmware version
                         * less than 0.8 variant2
                         *
                         *   If promiscuous mode disable, Prism2 chip
                         *  does not work with WEP .
                         * It is under investigation for details.
                         * (ichiro@NetBSD.org)
                         */
                        if (sc->sc_firmware_type == WI_INTERSIL &&
                            sc->sc_sta_firmware_ver < 802 ) {
                                /* firm ver < 0.8 variant 2 */
                                wi_write_val(sc, WI_RID_PROMISC, 1);
                        }
                        wi_write_val(sc, WI_RID_CNFAUTHMODE,
                            sc->sc_cnfauthmode);
                        val = PRIVACY_INVOKED;
                        if ((sc->sc_ic_flags & IEEE80211_F_DROPUNENC) != 0)
                                val |= EXCLUDE_UNENCRYPTED;
#ifndef IEEE80211_NO_HOSTAP
                        /*
                         * Encryption firmware has a bug for HostAP mode.
                         */
                        if (sc->sc_firmware_type == WI_INTERSIL &&
                            ic->ic_opmode == IEEE80211_M_HOSTAP)
                                val |= HOST_ENCRYPT;
#endif /* !IEEE80211_NO_HOSTAP */
                } else {
                        wi_write_val(sc, WI_RID_CNFAUTHMODE,
                            IEEE80211_AUTH_OPEN);
                        val = HOST_ENCRYPT | HOST_DECRYPT;
                }
                error = wi_write_val(sc, WI_RID_P2_ENCRYPTION, val);
                if (error)
                        break;
                error = wi_write_val(sc, WI_RID_P2_TX_CRYPT_KEY,
                    ic->ic_def_txkey);
                if (error)
                        break;
                /*
                 * It seems that the firmware accept 104bit key only if
                 * all the keys have 104bit length.  We get the length of
                 * the transmit key and use it for all other keys.
                 * Perhaps we should use software WEP for such situation.
                 */
                if (ic->ic_def_txkey == IEEE80211_KEYIX_NONE ||
                    IEEE80211_KEY_UNDEFINED(ic->ic_nw_keys[ic->ic_def_txkey]))
                        keylen = 13;    /* No keys => 104bit ok */
                else
                        keylen = ic->ic_nw_keys[ic->ic_def_txkey].wk_keylen;

                if (keylen > IEEE80211_WEP_KEYLEN)
                        keylen = 13;    /* 104bit keys */
                else
                        keylen = IEEE80211_WEP_KEYLEN;
                for (i = 0; i < IEEE80211_WEP_NKID; i++) {
                        error = wi_write_rid(sc, WI_RID_P2_CRYPT_KEY0 + i,
                            ic->ic_nw_keys[i].wk_key, keylen);
                        if (error)
                                break;
                }
                break;
        }
        if ((ifp->if_flags & IFF_RUNNING) != 0)
                wi_cmd(sc, WI_CMD_ENABLE | sc->sc_portnum, 0, 0, 0);
        if (error == 0)
                sc->sc_flags |= WI_FLAGS_WEP_VALID;
        return error;
}

/* Must be called at proper protection level! */
STATIC int
wi_cmd_start(struct wi_softc *sc, int cmd, int val0, int val1, int val2)
{
#ifdef WI_HISTOGRAM
        static int hist1[11];
        static int hist1count;
#endif
        int i;

        /* wait for the busy bit to clear */
        for (i = 500; i > 0; i--) {     /* 5s */
                if ((CSR_READ_2(sc, WI_COMMAND) & WI_CMD_BUSY) == 0)
                        break;
                if (sc->sc_invalid)
                        return ENXIO;
                DELAY(1000);    /* 1 m sec */
        }
        if (i == 0) {
                aprint_error_dev(sc->sc_dev, "wi_cmd: busy bit won't clear.\n");
                return (ETIMEDOUT);
        }
#ifdef WI_HISTOGRAM
        if (i > 490)
                hist1[500 - i]++;
        else
                hist1[10]++;
        if (++hist1count == 1000) {
                hist1count = 0;
                printf("%s: hist1: %d %d %d %d %d %d %d %d %d %d %d\n",
                    device_xname(sc->sc_dev),
                    hist1[0], hist1[1], hist1[2], hist1[3], hist1[4],
                    hist1[5], hist1[6], hist1[7], hist1[8], hist1[9],
                    hist1[10]);
        }
#endif
        CSR_WRITE_2(sc, WI_PARAM0, val0);
        CSR_WRITE_2(sc, WI_PARAM1, val1);
        CSR_WRITE_2(sc, WI_PARAM2, val2);
        CSR_WRITE_2(sc, WI_COMMAND, cmd);

        return 0;
}

STATIC int
wi_cmd(struct wi_softc *sc, int cmd, int val0, int val1, int val2)
{
        int rc;

#ifdef WI_DEBUG
        if (wi_debug) {
                printf("%s: [enter] %d txcmds outstanding\n", __func__,
                    sc->sc_txcmds);
        }
#endif
        if (sc->sc_txcmds > 0)
                wi_txcmd_wait(sc);

        if ((rc = wi_cmd_start(sc, cmd, val0, val1, val2)) != 0)
                return rc;

        if (cmd == WI_CMD_INI) {
                /* XXX: should sleep here. */
                if (sc->sc_invalid)
                        return ENXIO;
                DELAY(100*1000);
        }
        rc = wi_cmd_wait(sc, cmd, val0);

#ifdef WI_DEBUG
        if (wi_debug) {
                printf("%s: [     ] %d txcmds outstanding\n", __func__,
                    sc->sc_txcmds);
        }
#endif
        if (sc->sc_txcmds > 0)
                wi_cmd_intr(sc);

#ifdef WI_DEBUG
        if (wi_debug) {
                printf("%s: [leave] %d txcmds outstanding\n", __func__,
                    sc->sc_txcmds);
        }
#endif
        return rc;
}

STATIC int
wi_cmd_wait(struct wi_softc *sc, int cmd, int val0)
{
#ifdef WI_HISTOGRAM
        static int hist2[11];
        static int hist2count;
#endif
        int i, status;
#ifdef WI_DEBUG
        if (wi_debug > 1)
                printf("%s: cmd=%#x, arg=%#x\n", __func__, cmd, val0);
#endif /* WI_DEBUG */

        /* wait for the cmd completed bit */
        for (i = 0; i < WI_TIMEOUT; i++) {
                if (CSR_READ_2(sc, WI_EVENT_STAT) & WI_EV_CMD)
                        break;
                if (sc->sc_invalid)
                        return ENXIO;
                DELAY(WI_DELAY);
        }

#ifdef WI_HISTOGRAM
        if (i < 100)
                hist2[i/10]++;
        else
                hist2[10]++;
        if (++hist2count == 1000) {
                hist2count = 0;
                printf("%s: hist2: %d %d %d %d %d %d %d %d %d %d %d\n",
                    device_xname(sc->sc_dev),
                    hist2[0], hist2[1], hist2[2], hist2[3], hist2[4],
                    hist2[5], hist2[6], hist2[7], hist2[8], hist2[9],
                    hist2[10]);
        }
#endif

        status = CSR_READ_2(sc, WI_STATUS);

        if (i == WI_TIMEOUT) {
                aprint_error_dev(sc->sc_dev,
                    "command timed out, cmd=0x%x, arg=0x%x\n",
                    cmd, val0);
                return ETIMEDOUT;
        }

        CSR_WRITE_2(sc, WI_EVENT_ACK, WI_EV_CMD);

        if (status & WI_STAT_CMD_RESULT) {
                aprint_error_dev(sc->sc_dev,
                    "command failed, cmd=0x%x, arg=0x%x\n",
                    cmd, val0);
                return EIO;
        }
        return 0;
}

STATIC int
wi_seek_bap(struct wi_softc *sc, int id, int off)
{
#ifdef WI_HISTOGRAM
        static int hist4[11];
        static int hist4count;
#endif
        int i, status;

        CSR_WRITE_2(sc, WI_SEL0, id);
        CSR_WRITE_2(sc, WI_OFF0, off);

        for (i = 0; ; i++) {
                status = CSR_READ_2(sc, WI_OFF0);
                if ((status & WI_OFF_BUSY) == 0)
                        break;
                if (i == WI_TIMEOUT) {
                        aprint_error_dev(sc->sc_dev,
                            "timeout in wi_seek to %x/%x\n",
                            id, off);
                        sc->sc_bap_off = WI_OFF_ERR;    /* invalidate */
                        return ETIMEDOUT;
                }
                if (sc->sc_invalid)
                        return ENXIO;
                DELAY(2);
        }
#ifdef WI_HISTOGRAM
        if (i < 100)
                hist4[i/10]++;
        else
                hist4[10]++;
        if (++hist4count == 2500) {
                hist4count = 0;
                printf("%s: hist4: %d %d %d %d %d %d %d %d %d %d %d\n",
                    device_xname(sc->sc_dev),
                    hist4[0], hist4[1], hist4[2], hist4[3], hist4[4],
                    hist4[5], hist4[6], hist4[7], hist4[8], hist4[9],
                    hist4[10]);
        }
#endif
        if (status & WI_OFF_ERR) {
                printf("%s: failed in wi_seek to %x/%x\n",
                    device_xname(sc->sc_dev), id, off);
                sc->sc_bap_off = WI_OFF_ERR;    /* invalidate */
                return EIO;
        }
        sc->sc_bap_id = id;
        sc->sc_bap_off = off;
        return 0;
}

STATIC int
wi_read_bap(struct wi_softc *sc, int id, int off, void *buf, int buflen)
{
        int error, cnt;

        if (buflen == 0)
                return 0;
        if (id != sc->sc_bap_id || off != sc->sc_bap_off) {
                if ((error = wi_seek_bap(sc, id, off)) != 0)
                        return error;
        }
        cnt = (buflen + 1) / 2;
        CSR_READ_MULTI_STREAM_2(sc, WI_DATA0, (uint16_t *)buf, cnt);
        sc->sc_bap_off += cnt * 2;
        return 0;
}

STATIC int
wi_write_bap(struct wi_softc *sc, int id, int off, void *buf, int buflen)
{
        int error, cnt;

        if (buflen == 0)
                return 0;

#ifdef WI_HERMES_AUTOINC_WAR
  again:
#endif
        if (id != sc->sc_bap_id || off != sc->sc_bap_off) {
                if ((error = wi_seek_bap(sc, id, off)) != 0)
                        return error;
        }
        cnt = (buflen + 1) / 2;
        CSR_WRITE_MULTI_STREAM_2(sc, WI_DATA0, (uint16_t *)buf, cnt);
        sc->sc_bap_off += cnt * 2;

#ifdef WI_HERMES_AUTOINC_WAR
        /*
         * According to the comments in the HCF Light code, there is a bug
         * in the Hermes (or possibly in certain Hermes firmware revisions)
         * where the chip's internal autoincrement counter gets thrown off
         * during data writes:  the autoincrement is missed, causing one
         * data word to be overwritten and subsequent words to be written to
         * the wrong memory locations. The end result is that we could end
         * up transmitting bogus frames without realizing it. The workaround
         * for this is to write a couple of extra guard words after the end
         * of the transfer, then attempt to read then back. If we fail to
         * locate the guard words where we expect them, we preform the
         * transfer over again.
         */
        if ((sc->sc_flags & WI_FLAGS_BUG_AUTOINC) && (id & 0xf000) == 0) {
                CSR_WRITE_2(sc, WI_DATA0, 0x1234);
                CSR_WRITE_2(sc, WI_DATA0, 0x5678);
                wi_seek_bap(sc, id, sc->sc_bap_off);
                sc->sc_bap_off = WI_OFF_ERR;    /* invalidate */
                if (CSR_READ_2(sc, WI_DATA0) != 0x1234 ||
                    CSR_READ_2(sc, WI_DATA0) != 0x5678) {
                        aprint_error_dev(sc->sc_dev,
                            "detect auto increment bug, try again\n");
                        goto again;
                }
        }
#endif
        return 0;
}

STATIC int
wi_mwrite_bap(struct wi_softc *sc, int id, int off, struct mbuf *m0, int totlen)
{
        int error, len;
        struct mbuf *m;

        for (m = m0; m != NULL && totlen > 0; m = m->m_next) {
                if (m->m_len == 0)
                        continue;

                len = uimin(m->m_len, totlen);

                if (((u_long)m->m_data) % 2 != 0 || len % 2 != 0) {
                        m_copydata(m, 0, totlen, (void *)&sc->sc_txbuf);
                        return wi_write_bap(sc, id, off, (void *)&sc->sc_txbuf,
                            totlen);
                }

                if ((error = wi_write_bap(sc, id, off, m->m_data, len)) != 0)
                        return error;

                off += m->m_len;
                totlen -= len;
        }
        return 0;
}

STATIC int
wi_alloc_fid(struct wi_softc *sc, int len, int *idp)
{
        int i;

        if (wi_cmd(sc, WI_CMD_ALLOC_MEM, len, 0, 0)) {
                aprint_error_dev(sc->sc_dev, "failed to allocate %d bytes on NIC\n", len);
                return ENOMEM;
        }

        for (i = 0; i < WI_TIMEOUT; i++) {
                if (CSR_READ_2(sc, WI_EVENT_STAT) & WI_EV_ALLOC)
                        break;
                DELAY(1);
        }
        if (i == WI_TIMEOUT) {
                aprint_error_dev(sc->sc_dev, "timeout in alloc\n");
                return ETIMEDOUT;
        }
        *idp = CSR_READ_2(sc, WI_ALLOC_FID);
        CSR_WRITE_2(sc, WI_EVENT_ACK, WI_EV_ALLOC);
        return 0;
}

STATIC int
wi_read_rid(struct wi_softc *sc, int rid, void *buf, int *buflenp)
{
        int error, len;
        uint16_t ltbuf[2];

        /* Tell the NIC to enter record read mode. */
        error = wi_cmd(sc, WI_CMD_ACCESS | WI_ACCESS_READ, rid, 0, 0);
        if (error)
                return error;

        error = wi_read_bap(sc, rid, 0, ltbuf, sizeof(ltbuf));
        if (error)
                return error;

        if (le16toh(ltbuf[0]) == 0)
                return EOPNOTSUPP;
        if (le16toh(ltbuf[1]) != rid) {
                aprint_error_dev(sc->sc_dev,
                    "record read mismatch, rid=%x, got=%x\n",
                    rid, le16toh(ltbuf[1]));
                return EIO;
        }
        len = (le16toh(ltbuf[0]) - 1) * 2;       /* already got rid */
        if (*buflenp < len) {
                aprint_error_dev(sc->sc_dev, "record buffer is too small, "
                    "rid=%x, size=%d, len=%d\n",
                    rid, *buflenp, len);
                return ENOSPC;
        }
        *buflenp = len;
        return wi_read_bap(sc, rid, sizeof(ltbuf), buf, len);
}

STATIC int
wi_write_rid(struct wi_softc *sc, int rid, void *buf, int buflen)
{
        int error;
        uint16_t ltbuf[2];

        ltbuf[0] = htole16((buflen + 1) / 2 + 1);        /* includes rid */
        ltbuf[1] = htole16(rid);

        error = wi_write_bap(sc, rid, 0, ltbuf, sizeof(ltbuf));
        if (error)
                return error;
        error = wi_write_bap(sc, rid, sizeof(ltbuf), buf, buflen);
        if (error)
                return error;

        return wi_cmd(sc, WI_CMD_ACCESS | WI_ACCESS_WRITE, rid, 0, 0);
}

STATIC void
wi_rssadapt_updatestats_cb(void *arg, struct ieee80211_node *ni)
{
        struct wi_node *wn = (void*)ni;
        ieee80211_rssadapt_updatestats(&wn->wn_rssadapt);
}

STATIC void
wi_rssadapt_updatestats(void *arg)
{
        struct wi_softc *sc = arg;
        struct ieee80211com *ic = &sc->sc_ic;
        int s;

        s = splnet();
        ieee80211_iterate_nodes(&ic->ic_sta, wi_rssadapt_updatestats_cb, arg);
        if (ic->ic_opmode != IEEE80211_M_MONITOR &&
            ic->ic_state == IEEE80211_S_RUN)
                callout_reset(&sc->sc_rssadapt_ch, hz / 10,
                    wi_rssadapt_updatestats, arg);
        splx(s);
}

/*
 * In HOSTAP mode, restore IEEE80211_F_DROPUNENC when operating
 * with WEP enabled so that the AP drops unencoded frames at the
 * 802.11 layer.
 *
 * In all other modes, clear IEEE80211_F_DROPUNENC when operating
 * with WEP enabled so we don't drop unencoded frames at the 802.11
 * layer.  This is necessary because we must strip the WEP bit from
 * the 802.11 header before passing frames to ieee80211_input
 * because the card has already stripped the WEP crypto header from
 * the packet.
 */
STATIC void
wi_mend_flags(struct wi_softc *sc, enum ieee80211_state nstate)
{
        struct ieee80211com *ic = &sc->sc_ic;

        if (nstate == IEEE80211_S_RUN &&
            (ic->ic_flags & IEEE80211_F_PRIVACY) != 0 &&
            ic->ic_opmode != IEEE80211_M_HOSTAP)
                ic->ic_flags &= ~IEEE80211_F_DROPUNENC;
        else
                ic->ic_flags |= sc->sc_ic_flags;

        DPRINTF(("%s: state %d, "
            "ic->ic_flags & IEEE80211_F_DROPUNENC = %#" PRIx32 ", "
            "sc->sc_ic_flags & IEEE80211_F_DROPUNENC = %#" PRIx32 "\n",
            __func__, nstate,
            ic->ic_flags & IEEE80211_F_DROPUNENC,
            sc->sc_ic_flags & IEEE80211_F_DROPUNENC));
}

STATIC int
wi_newstate(struct ieee80211com *ic, enum ieee80211_state nstate, int arg)
{
        struct ifnet *ifp = ic->ic_ifp;
        struct wi_softc *sc = ifp->if_softc;
        struct ieee80211_node *ni = ic->ic_bss;
        uint16_t val;
        struct wi_ssid ssid;
        struct wi_macaddr bssid, old_bssid;
        enum ieee80211_state ostate __unused;
#ifdef WI_DEBUG
        static const char *stname[] =
            { "INIT", "SCAN", "AUTH", "ASSOC", "RUN" };
#endif /* WI_DEBUG */

        ostate = ic->ic_state;
        DPRINTF(("wi_newstate: %s -> %s\n", stname[ostate], stname[nstate]));

        switch (nstate) {
        case IEEE80211_S_INIT:
                if (ic->ic_opmode != IEEE80211_M_MONITOR)
                        callout_stop(&sc->sc_rssadapt_ch);
                ic->ic_flags &= ~IEEE80211_F_SIBSS;
                sc->sc_flags &= ~WI_FLAGS_OUTRANGE;
                break;

        case IEEE80211_S_SCAN:
        case IEEE80211_S_AUTH:
        case IEEE80211_S_ASSOC:
                ic->ic_state = nstate; /* NB: skip normal ieee80211 handling */
                wi_mend_flags(sc, nstate);
                return 0;

        case IEEE80211_S_RUN:
                sc->sc_flags &= ~WI_FLAGS_OUTRANGE;
                IEEE80211_ADDR_COPY(old_bssid.wi_mac_addr, ni->ni_bssid);
                wi_read_xrid(sc, WI_RID_CURRENT_BSSID, &bssid,
                    IEEE80211_ADDR_LEN);
                IEEE80211_ADDR_COPY(ni->ni_bssid, &bssid);
                IEEE80211_ADDR_COPY(ni->ni_macaddr, &bssid);
                wi_read_xrid(sc, WI_RID_CURRENT_CHAN, &val, sizeof(val));
                if (!isset(ic->ic_chan_avail, le16toh(val)))
                        panic("%s: invalid channel %d\n",
                            device_xname(sc->sc_dev), le16toh(val));
                ni->ni_chan = &ic->ic_channels[le16toh(val)];

                if (ic->ic_opmode == IEEE80211_M_HOSTAP) {
#ifndef IEEE80211_NO_HOSTAP
                        ni->ni_esslen = ic->ic_des_esslen;
                        memcpy(ni->ni_essid, ic->ic_des_essid, ni->ni_esslen);
                        ni->ni_rates = ic->ic_sup_rates[
                            ieee80211_chan2mode(ic, ni->ni_chan)];
                        ni->ni_intval = ic->ic_lintval;
                        ni->ni_capinfo = IEEE80211_CAPINFO_ESS;
                        if (ic->ic_flags & IEEE80211_F_PRIVACY)
                                ni->ni_capinfo |= IEEE80211_CAPINFO_PRIVACY;
#endif /* !IEEE80211_NO_HOSTAP */
                } else {
                        wi_read_xrid(sc, WI_RID_CURRENT_SSID, &ssid,
                            sizeof(ssid));
                        ni->ni_esslen = le16toh(ssid.wi_len);
                        if (ni->ni_esslen > IEEE80211_NWID_LEN)
                                ni->ni_esslen = IEEE80211_NWID_LEN;     /*XXX*/
                        memcpy(ni->ni_essid, ssid.wi_ssid, ni->ni_esslen);
                        ni->ni_rates = ic->ic_sup_rates[
                            ieee80211_chan2mode(ic, ni->ni_chan)]; /*XXX*/
                }
                if (ic->ic_opmode != IEEE80211_M_MONITOR)
                        callout_reset(&sc->sc_rssadapt_ch, hz / 10,
                            wi_rssadapt_updatestats, sc);
                /* Trigger routing socket messages. XXX Copied from
                 * ieee80211_newstate.
                 */
                if (ic->ic_opmode == IEEE80211_M_STA)
                        ieee80211_notify_node_join(ic, ic->ic_bss,
                                arg == IEEE80211_FC0_SUBTYPE_ASSOC_RESP);
                break;
        }
        wi_mend_flags(sc, nstate);
        return (*sc->sc_newstate)(ic, nstate, arg);
}

STATIC void
wi_set_tim(struct ieee80211_node *ni, int set)
{
        struct ieee80211com *ic = ni->ni_ic;
        struct wi_softc *sc = ic->ic_ifp->if_softc;

        (*sc->sc_set_tim)(ni, set);

        if ((ic->ic_flags & IEEE80211_F_TIMUPDATE) == 0)
                return;

        ic->ic_flags &= ~IEEE80211_F_TIMUPDATE;

        (void)wi_write_val(sc, WI_RID_SET_TIM,
            IEEE80211_AID(ni->ni_associd) | (set ? 0x8000 : 0));
}

STATIC int
wi_scan_ap(struct wi_softc *sc, uint16_t chanmask, uint16_t txrate)
{
        int error = 0;
        uint16_t val[2];

        if (!sc->sc_enabled)
                return ENXIO;
        switch (sc->sc_firmware_type) {
        case WI_LUCENT:
                (void)wi_cmd(sc, WI_CMD_INQUIRE, WI_INFO_SCAN_RESULTS, 0, 0);
                break;
        case WI_INTERSIL:
                val[0] = htole16(chanmask);     /* channel */
                val[1] = htole16(txrate);       /* tx rate */
                error = wi_write_rid(sc, WI_RID_SCAN_REQ, val, sizeof(val));
                break;
        case WI_SYMBOL:
                /*
                 * XXX only supported on 3.x ?
                 */
                val[0] = htole16(BSCAN_BCAST | BSCAN_ONETIME);
                error = wi_write_rid(sc, WI_RID_BCAST_SCAN_REQ,
                    val, sizeof(val[0]));
                break;
        }
        if (error == 0) {
                sc->sc_scan_timer = WI_SCAN_WAIT;
                sc->sc_if.if_timer = 1;
                DPRINTF(("wi_scan_ap: start scanning, "
                        "chanmask 0x%x txrate 0x%x\n", chanmask, txrate));
        }
        return error;
}

STATIC void
wi_scan_result(struct wi_softc *sc, int fid, int cnt)
{
#define N(a)    (sizeof (a) / sizeof (a[0]))
        int i, naps, off, szbuf;
        struct wi_scan_header ws_hdr;   /* Prism2 header */
        struct wi_scan_data_p2 ws_dat;  /* Prism2 scantable*/
        struct wi_apinfo *ap;

        off = sizeof(uint16_t) * 2;
        memset(&ws_hdr, 0, sizeof(ws_hdr));
        switch (sc->sc_firmware_type) {
        case WI_INTERSIL:
                wi_read_bap(sc, fid, off, &ws_hdr, sizeof(ws_hdr));
                off += sizeof(ws_hdr);
                szbuf = sizeof(struct wi_scan_data_p2);
                break;
        case WI_SYMBOL:
                szbuf = sizeof(struct wi_scan_data_p2) + 6;
                break;
        case WI_LUCENT:
                szbuf = sizeof(struct wi_scan_data);
                break;
        default:
                aprint_error_dev(sc->sc_dev,
                    "wi_scan_result: unknown firmware type %u\n",
                    sc->sc_firmware_type);
                naps = 0;
                goto done;
        }
        naps = (cnt * 2 + 2 - off) / szbuf;
        if (naps > N(sc->sc_aps))
                naps = N(sc->sc_aps);
        sc->sc_naps = naps;
        /* Read Data */
        ap = sc->sc_aps;
        memset(&ws_dat, 0, sizeof(ws_dat));
        for (i = 0; i < naps; i++, ap++) {
                wi_read_bap(sc, fid, off, &ws_dat,
                    (sizeof(ws_dat) < szbuf ? sizeof(ws_dat) : szbuf));
                DPRINTF2(("wi_scan_result: #%d: off %d bssid %s\n", i, off,
                    ether_sprintf(ws_dat.wi_bssid)));
                off += szbuf;
                ap->scanreason = le16toh(ws_hdr.wi_reason);
                memcpy(ap->bssid, ws_dat.wi_bssid, sizeof(ap->bssid));
                ap->channel = le16toh(ws_dat.wi_chid);
                ap->signal  = le16toh(ws_dat.wi_signal);
                ap->noise   = le16toh(ws_dat.wi_noise);
                ap->quality = ap->signal - ap->noise;
                ap->capinfo = le16toh(ws_dat.wi_capinfo);
                ap->interval = le16toh(ws_dat.wi_interval);
                ap->rate    = le16toh(ws_dat.wi_rate);
                ap->namelen = le16toh(ws_dat.wi_namelen);
                if (ap->namelen > sizeof(ap->name))
                        ap->namelen = sizeof(ap->name);
                memcpy(ap->name, ws_dat.wi_name, ap->namelen);
        }
done:
        /* Done scanning */
        sc->sc_scan_timer = 0;
        DPRINTF(("wi_scan_result: scan complete: ap %d\n", naps));
#undef N
}

STATIC void
wi_dump_pkt(struct wi_frame *wh, struct ieee80211_node *ni, int rssi)
{
        ieee80211_dump_pkt((uint8_t *) &wh->wi_whdr, sizeof(wh->wi_whdr),
            ni  ? ni->ni_rates.rs_rates[ni->ni_txrate] & IEEE80211_RATE_VAL
                : -1,
            rssi);
        printf(" status 0x%x rx_tstamp1 %#x rx_tstamp0 %#x rx_silence %u\n",
                le16toh(wh->wi_status), le16toh(wh->wi_rx_tstamp1),
                le16toh(wh->wi_rx_tstamp0), wh->wi_rx_silence);
        printf(" rx_signal %u rx_rate %u rx_flow %u\n",
                wh->wi_rx_signal, wh->wi_rx_rate, wh->wi_rx_flow);
        printf(" tx_rtry %u tx_rate %u tx_ctl 0x%x dat_len %u\n",
                wh->wi_tx_rtry, wh->wi_tx_rate,
                le16toh(wh->wi_tx_ctl), le16toh(wh->wi_dat_len));
        printf(" ehdr dst %s src %s type 0x%x\n",
                ether_sprintf(wh->wi_ehdr.ether_dhost),
                ether_sprintf(wh->wi_ehdr.ether_shost),
                wh->wi_ehdr.ether_type);
}