root/sys/dev/ral/rt2860.c
/*-
 * Copyright (c) 2007-2010 Damien Bergamini <damien.bergamini@free.fr>
 * Copyright (c) 2012 Bernhard Schmidt <bschmidt@FreeBSD.org>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 *
 * $OpenBSD: rt2860.c,v 1.65 2010/10/23 14:24:54 damien Exp $
 */

#include <sys/cdefs.h>
/*-
 * Ralink Technology RT2860/RT3090/RT3390/RT3562/RT5390/RT5392 chipset driver
 * http://www.ralinktech.com/
 */

#include <sys/param.h>
#include <sys/sysctl.h>
#include <sys/sockio.h>
#include <sys/mbuf.h>
#include <sys/kernel.h>
#include <sys/socket.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/module.h>
#include <sys/bus.h>
#include <sys/endian.h>
#include <sys/firmware.h>

#include <machine/bus.h>
#include <machine/resource.h>
#include <sys/rman.h>

#include <net/bpf.h>
#include <net/if.h>
#include <net/if_var.h>
#include <net/if_arp.h>
#include <net/ethernet.h>
#include <net/if_dl.h>
#include <net/if_media.h>
#include <net/if_types.h>

#include <net80211/ieee80211_var.h>
#include <net80211/ieee80211_radiotap.h>
#include <net80211/ieee80211_regdomain.h>
#include <net80211/ieee80211_ratectl.h>

#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/in_var.h>
#include <netinet/ip.h>
#include <netinet/if_ether.h>

#include <dev/ral/rt2860reg.h>
#include <dev/ral/rt2860var.h>

#define RAL_DEBUG
#ifdef RAL_DEBUG
#define DPRINTF(x)      do { if (sc->sc_debug > 0) printf x; } while (0)
#define DPRINTFN(n, x)  do { if (sc->sc_debug >= (n)) printf x; } while (0)
#else
#define DPRINTF(x)
#define DPRINTFN(n, x)
#endif

static struct ieee80211vap *rt2860_vap_create(struct ieee80211com *,
                            const char [IFNAMSIZ], int, enum ieee80211_opmode,
                            int, const uint8_t [IEEE80211_ADDR_LEN],
                            const uint8_t [IEEE80211_ADDR_LEN]);
static void     rt2860_vap_delete(struct ieee80211vap *);
static void     rt2860_dma_map_addr(void *, bus_dma_segment_t *, int, int);
static int      rt2860_alloc_tx_ring(struct rt2860_softc *,
                    struct rt2860_tx_ring *);
static void     rt2860_reset_tx_ring(struct rt2860_softc *,
                    struct rt2860_tx_ring *);
static void     rt2860_free_tx_ring(struct rt2860_softc *,
                    struct rt2860_tx_ring *);
static int      rt2860_alloc_tx_pool(struct rt2860_softc *);
static void     rt2860_free_tx_pool(struct rt2860_softc *);
static int      rt2860_alloc_rx_ring(struct rt2860_softc *,
                    struct rt2860_rx_ring *);
static void     rt2860_reset_rx_ring(struct rt2860_softc *,
                    struct rt2860_rx_ring *);
static void     rt2860_free_rx_ring(struct rt2860_softc *,
                    struct rt2860_rx_ring *);
static void     rt2860_updatestats(struct rt2860_softc *);
static void     rt2860_newassoc(struct ieee80211_node *, int);
static void     rt2860_node_free(struct ieee80211_node *);
#ifdef IEEE80211_HT
static int      rt2860_ampdu_rx_start(struct ieee80211com *,
                    struct ieee80211_node *, uint8_t);
static void     rt2860_ampdu_rx_stop(struct ieee80211com *,
                    struct ieee80211_node *, uint8_t);
#endif
static int      rt2860_newstate(struct ieee80211vap *, enum ieee80211_state,
                    int);
static uint16_t rt3090_efuse_read_2(struct rt2860_softc *, uint16_t);
static uint16_t rt2860_eeprom_read_2(struct rt2860_softc *, uint16_t);
static void     rt2860_intr_coherent(struct rt2860_softc *);
static void     rt2860_drain_stats_fifo(struct rt2860_softc *);
static void     rt2860_tx_intr(struct rt2860_softc *, int);
static void     rt2860_rx_intr(struct rt2860_softc *);
static void     rt2860_tbtt_intr(struct rt2860_softc *);
static void     rt2860_gp_intr(struct rt2860_softc *);
static int      rt2860_tx(struct rt2860_softc *, struct mbuf *,
                    struct ieee80211_node *);
static int      rt2860_raw_xmit(struct ieee80211_node *, struct mbuf *,
                    const struct ieee80211_bpf_params *);
static int      rt2860_tx_raw(struct rt2860_softc *, struct mbuf *,
                    struct ieee80211_node *,
                    const struct ieee80211_bpf_params *params);
static int      rt2860_transmit(struct ieee80211com *, struct mbuf *);
static void     rt2860_start(struct rt2860_softc *);
static void     rt2860_watchdog(void *);
static void     rt2860_parent(struct ieee80211com *);
static void     rt2860_mcu_bbp_write(struct rt2860_softc *, uint8_t, uint8_t);
static uint8_t  rt2860_mcu_bbp_read(struct rt2860_softc *, uint8_t);
static void     rt2860_rf_write(struct rt2860_softc *, uint8_t, uint32_t);
static uint8_t  rt3090_rf_read(struct rt2860_softc *, uint8_t);
static void     rt3090_rf_write(struct rt2860_softc *, uint8_t, uint8_t);
static int      rt2860_mcu_cmd(struct rt2860_softc *, uint8_t, uint16_t, int);
static void     rt2860_enable_mrr(struct rt2860_softc *);
static void     rt2860_set_txpreamble(struct rt2860_softc *);
static void     rt2860_set_basicrates(struct rt2860_softc *,
                    const struct ieee80211_rateset *);
static void     rt2860_scan_start(struct ieee80211com *);
static void     rt2860_scan_end(struct ieee80211com *);
static void     rt2860_getradiocaps(struct ieee80211com *, int, int *,
                    struct ieee80211_channel[]);
static void     rt2860_set_channel(struct ieee80211com *);
static void     rt2860_select_chan_group(struct rt2860_softc *, int);
static void     rt2860_set_chan(struct rt2860_softc *, u_int);
static void     rt3090_set_chan(struct rt2860_softc *, u_int);
static void     rt5390_set_chan(struct rt2860_softc *, u_int);
static int      rt3090_rf_init(struct rt2860_softc *);
static void     rt5390_rf_init(struct rt2860_softc *);
static void     rt3090_rf_wakeup(struct rt2860_softc *);
static void     rt5390_rf_wakeup(struct rt2860_softc *);
static int      rt3090_filter_calib(struct rt2860_softc *, uint8_t, uint8_t,
                    uint8_t *);
static void     rt3090_rf_setup(struct rt2860_softc *);
static void     rt2860_set_leds(struct rt2860_softc *, uint16_t);
static void     rt2860_set_gp_timer(struct rt2860_softc *, int);
static void     rt2860_set_bssid(struct rt2860_softc *, const uint8_t *);
static void     rt2860_set_macaddr(struct rt2860_softc *, const uint8_t *);
static void     rt2860_update_promisc(struct ieee80211com *);
static void     rt2860_updateslot(struct ieee80211com *);
static void     rt2860_updateprot(struct rt2860_softc *);
static int      rt2860_updateedca(struct ieee80211com *);
#ifdef HW_CRYPTO
static int      rt2860_set_key(struct ieee80211com *, struct ieee80211_node *,
                    struct ieee80211_key *);
static void     rt2860_delete_key(struct ieee80211com *,
                    struct ieee80211_node *, struct ieee80211_key *);
#endif
static int8_t   rt2860_rssi2dbm(struct rt2860_softc *, uint8_t, uint8_t);
static const char *rt2860_get_rf(uint16_t);
static int      rt2860_read_eeprom(struct rt2860_softc *,
                    uint8_t macaddr[IEEE80211_ADDR_LEN]);
static int      rt2860_bbp_init(struct rt2860_softc *);
static void     rt5390_bbp_init(struct rt2860_softc *);
static int      rt2860_txrx_enable(struct rt2860_softc *);
static void     rt2860_init(void *);
static void     rt2860_init_locked(struct rt2860_softc *);
static void     rt2860_stop(void *);
static void     rt2860_stop_locked(struct rt2860_softc *);
static int      rt2860_load_microcode(struct rt2860_softc *);
#ifdef NOT_YET
static void     rt2860_calib(struct rt2860_softc *);
#endif
static void     rt3090_set_rx_antenna(struct rt2860_softc *, int);
static void     rt2860_switch_chan(struct rt2860_softc *,
                    struct ieee80211_channel *);
static int      rt2860_setup_beacon(struct rt2860_softc *,
                    struct ieee80211vap *);
static void     rt2860_enable_tsf_sync(struct rt2860_softc *);

static const struct {
        uint32_t        reg;
        uint32_t        val;
} rt2860_def_mac[] = {
        RT2860_DEF_MAC
};

static const struct {
        uint8_t reg;
        uint8_t val;
} rt2860_def_bbp[] = {
        RT2860_DEF_BBP
}, rt5390_def_bbp[] = {
        RT5390_DEF_BBP
};

static const struct rfprog {
        uint8_t         chan;
        uint32_t        r1, r2, r3, r4;
} rt2860_rf2850[] = {
        RT2860_RF2850
};

struct {
        uint8_t n, r, k;
} rt3090_freqs[] = {
        RT3070_RF3052
};

static const struct {
        uint8_t reg;
        uint8_t val;
} rt3090_def_rf[] = {
        RT3070_DEF_RF
}, rt5390_def_rf[] = {
        RT5390_DEF_RF
}, rt5392_def_rf[] = {
        RT5392_DEF_RF
};

static const uint8_t rt2860_chan_5ghz[] =
        { 36, 38, 40, 44, 46, 48, 52, 54, 56, 60, 62, 64, 100, 102, 104,
          108, 110, 112, 116, 118, 120, 124, 126, 128, 132, 134, 136, 140,
          149, 151, 153, 157, 159, 161, 165, 167, 169, 171, 173 };

int
rt2860_attach(device_t dev, int id)
{
        struct rt2860_softc *sc = device_get_softc(dev);
        struct ieee80211com *ic = &sc->sc_ic;
        uint32_t tmp;
        int error, ntries, qid;

        sc->sc_dev = dev;
        sc->sc_debug = 0;

        mtx_init(&sc->sc_mtx, device_get_nameunit(dev), MTX_NETWORK_LOCK,
            MTX_DEF | MTX_RECURSE);

        callout_init_mtx(&sc->watchdog_ch, &sc->sc_mtx, 0);
        mbufq_init(&sc->sc_snd, ifqmaxlen);

        /* wait for NIC to initialize */
        for (ntries = 0; ntries < 100; ntries++) {
                tmp = RAL_READ(sc, RT2860_ASIC_VER_ID);
                if (tmp != 0 && tmp != 0xffffffff)
                        break;
                DELAY(10);
        }
        if (ntries == 100) {
                device_printf(sc->sc_dev,
                    "timeout waiting for NIC to initialize\n");
                error = EIO;
                goto fail1;
        }
        sc->mac_ver = tmp >> 16;
        sc->mac_rev = tmp & 0xffff;

        if (sc->mac_ver != 0x2860 &&
            (id == 0x0681 || id == 0x0781 || id == 0x1059))
                sc->sc_flags |= RT2860_ADVANCED_PS;

        /* retrieve RF rev. no and various other things from EEPROM */
        rt2860_read_eeprom(sc, ic->ic_macaddr);
        device_printf(sc->sc_dev, "MAC/BBP RT%X (rev 0x%04X), "
            "RF %s (MIMO %dT%dR), address %6D\n",
            sc->mac_ver, sc->mac_rev, rt2860_get_rf(sc->rf_rev),
            sc->ntxchains, sc->nrxchains, ic->ic_macaddr, ":");

        /*
         * Allocate Tx (4 EDCAs + HCCA + Mgt) and Rx rings.
         */
        for (qid = 0; qid < 6; qid++) {
                if ((error = rt2860_alloc_tx_ring(sc, &sc->txq[qid])) != 0) {
                        device_printf(sc->sc_dev,
                            "could not allocate Tx ring %d\n", qid);
                        goto fail2;
                }
        }

        if ((error = rt2860_alloc_rx_ring(sc, &sc->rxq)) != 0) {
                device_printf(sc->sc_dev, "could not allocate Rx ring\n");
                goto fail2;
        }

        if ((error = rt2860_alloc_tx_pool(sc)) != 0) {
                device_printf(sc->sc_dev, "could not allocate Tx pool\n");
                goto fail3;
        }

        /* mgmt ring is broken on RT2860C, use EDCA AC VO ring instead */
        sc->mgtqid = (sc->mac_ver == 0x2860 && sc->mac_rev == 0x0100) ?
            WME_AC_VO : 5;

        ic->ic_softc = sc;
        ic->ic_name = device_get_nameunit(dev);
        ic->ic_opmode = IEEE80211_M_STA;
        ic->ic_phytype = IEEE80211_T_OFDM; /* not only, but not used */

        /* set device capabilities */
        ic->ic_caps =
                  IEEE80211_C_STA               /* station mode */
                | IEEE80211_C_IBSS              /* ibss, nee adhoc, mode */
                | IEEE80211_C_HOSTAP            /* hostap mode */
                | IEEE80211_C_MONITOR           /* monitor mode */
                | IEEE80211_C_AHDEMO            /* adhoc demo mode */
                | IEEE80211_C_WDS               /* 4-address traffic works */
                | IEEE80211_C_MBSS              /* mesh point link mode */
                | IEEE80211_C_SHPREAMBLE        /* short preamble supported */
                | IEEE80211_C_SHSLOT            /* short slot time supported */
                | IEEE80211_C_WPA               /* capable of WPA1+WPA2 */
#if 0
                | IEEE80211_C_BGSCAN            /* capable of bg scanning */
#endif
                | IEEE80211_C_WME               /* 802.11e */
                ;

        ic->ic_flags_ext |= IEEE80211_FEXT_SEQNO_OFFLOAD;

        rt2860_getradiocaps(ic, IEEE80211_CHAN_MAX, &ic->ic_nchans,
            ic->ic_channels);

        ieee80211_ifattach(ic);

        ic->ic_wme.wme_update = rt2860_updateedca;
        ic->ic_scan_start = rt2860_scan_start;
        ic->ic_scan_end = rt2860_scan_end;
        ic->ic_getradiocaps = rt2860_getradiocaps;
        ic->ic_set_channel = rt2860_set_channel;
        ic->ic_updateslot = rt2860_updateslot;
        ic->ic_update_promisc = rt2860_update_promisc;
        ic->ic_raw_xmit = rt2860_raw_xmit;
        sc->sc_node_free = ic->ic_node_free;
        ic->ic_node_free = rt2860_node_free;
        ic->ic_newassoc = rt2860_newassoc;
        ic->ic_transmit = rt2860_transmit;
        ic->ic_parent = rt2860_parent;
        ic->ic_vap_create = rt2860_vap_create;
        ic->ic_vap_delete = rt2860_vap_delete;

        ieee80211_radiotap_attach(ic,
            &sc->sc_txtap.wt_ihdr, sizeof(sc->sc_txtap),
                RT2860_TX_RADIOTAP_PRESENT,
            &sc->sc_rxtap.wr_ihdr, sizeof(sc->sc_rxtap),
                RT2860_RX_RADIOTAP_PRESENT);

#ifdef RAL_DEBUG
        SYSCTL_ADD_INT(device_get_sysctl_ctx(dev),
            SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO,
            "debug", CTLFLAG_RW, &sc->sc_debug, 0, "debug msgs");
#endif
        if (bootverbose)
                ieee80211_announce(ic);

        return 0;

fail3:  rt2860_free_rx_ring(sc, &sc->rxq);
fail2:  while (--qid >= 0)
                rt2860_free_tx_ring(sc, &sc->txq[qid]);
fail1:  mtx_destroy(&sc->sc_mtx);
        return error;
}

int
rt2860_detach(void *xsc)
{
        struct rt2860_softc *sc = xsc;
        struct ieee80211com *ic = &sc->sc_ic;
        int qid;

        RAL_LOCK(sc);
        rt2860_stop_locked(sc);
        RAL_UNLOCK(sc);

        ieee80211_ifdetach(ic);
        mbufq_drain(&sc->sc_snd);
        for (qid = 0; qid < 6; qid++)
                rt2860_free_tx_ring(sc, &sc->txq[qid]);
        rt2860_free_rx_ring(sc, &sc->rxq);
        rt2860_free_tx_pool(sc);

        mtx_destroy(&sc->sc_mtx);

        return 0;
}

void
rt2860_shutdown(void *xsc)
{
        struct rt2860_softc *sc = xsc;

        rt2860_stop(sc);
}

void
rt2860_suspend(void *xsc)
{
        struct rt2860_softc *sc = xsc;

        rt2860_stop(sc);
}

void
rt2860_resume(void *xsc)
{
        struct rt2860_softc *sc = xsc;

        if (sc->sc_ic.ic_nrunning > 0)
                rt2860_init(sc);
}

static struct ieee80211vap *
rt2860_vap_create(struct ieee80211com *ic, const char name[IFNAMSIZ], int unit,
    enum ieee80211_opmode opmode, int flags,
    const uint8_t bssid[IEEE80211_ADDR_LEN],
    const uint8_t mac[IEEE80211_ADDR_LEN])
{
        struct rt2860_softc *sc = ic->ic_softc;
        struct rt2860_vap *rvp;
        struct ieee80211vap *vap;

        switch (opmode) {
        case IEEE80211_M_STA:
        case IEEE80211_M_IBSS:
        case IEEE80211_M_AHDEMO:
        case IEEE80211_M_MONITOR:
        case IEEE80211_M_HOSTAP:
        case IEEE80211_M_MBSS:
                /* XXXRP: TBD */
                if (!TAILQ_EMPTY(&ic->ic_vaps)) {
                        device_printf(sc->sc_dev, "only 1 vap supported\n");
                        return NULL;
                }
                if (opmode == IEEE80211_M_STA)
                        flags |= IEEE80211_CLONE_NOBEACONS;
                break;
        case IEEE80211_M_WDS:
                if (TAILQ_EMPTY(&ic->ic_vaps) ||
                    ic->ic_opmode != IEEE80211_M_HOSTAP) {
                        device_printf(sc->sc_dev,
                            "wds only supported in ap mode\n");
                        return NULL;
                }
                /*
                 * Silently remove any request for a unique
                 * bssid; WDS vap's always share the local
                 * mac address.
                 */
                flags &= ~IEEE80211_CLONE_BSSID;
                break;
        default:
                device_printf(sc->sc_dev, "unknown opmode %d\n", opmode);
                return NULL;
        }
        rvp = malloc(sizeof(struct rt2860_vap), M_80211_VAP, M_WAITOK | M_ZERO);
        vap = &rvp->ral_vap;
        ieee80211_vap_setup(ic, vap, name, unit, opmode, flags, bssid);

        /* override state transition machine */
        rvp->ral_newstate = vap->iv_newstate;
        vap->iv_newstate = rt2860_newstate;
#if 0
        vap->iv_update_beacon = rt2860_beacon_update;
#endif

        /* HW supports up to 255 STAs (0-254) in HostAP and IBSS modes */
        vap->iv_max_aid = min(IEEE80211_AID_MAX, RT2860_WCID_MAX);

        ieee80211_ratectl_init(vap);
        /* complete setup */
        ieee80211_vap_attach(vap, ieee80211_media_change,
            ieee80211_media_status, mac);
        if (TAILQ_FIRST(&ic->ic_vaps) == vap)
                ic->ic_opmode = opmode;
        return vap;
}

static void
rt2860_vap_delete(struct ieee80211vap *vap)
{
        struct rt2860_vap *rvp = RT2860_VAP(vap);

        ieee80211_ratectl_deinit(vap);
        ieee80211_vap_detach(vap);
        free(rvp, M_80211_VAP);
}

static void
rt2860_dma_map_addr(void *arg, bus_dma_segment_t *segs, int nseg, int error)
{
        if (error != 0)
                return;

        KASSERT(nseg == 1, ("too many DMA segments, %d should be 1", nseg));

        *(bus_addr_t *)arg = segs[0].ds_addr;
}

static int
rt2860_alloc_tx_ring(struct rt2860_softc *sc, struct rt2860_tx_ring *ring)
{
        int size, error;

        size = RT2860_TX_RING_COUNT * sizeof (struct rt2860_txd);

        error = bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), 16, 0,
            BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL,
            size, 1, size, 0, NULL, NULL, &ring->desc_dmat);
        if (error != 0) {
                device_printf(sc->sc_dev, "could not create desc DMA tag\n");
                goto fail;
        }

        error = bus_dmamem_alloc(ring->desc_dmat, (void **)&ring->txd,
            BUS_DMA_NOWAIT | BUS_DMA_ZERO, &ring->desc_map);
        if (error != 0) {
                device_printf(sc->sc_dev, "could not allocate DMA memory\n");
                goto fail;
        }

        error = bus_dmamap_load(ring->desc_dmat, ring->desc_map, ring->txd,
            size, rt2860_dma_map_addr, &ring->paddr, 0);
        if (error != 0) {
                device_printf(sc->sc_dev, "could not load desc DMA map\n");
                goto fail;
        }

        bus_dmamap_sync(ring->desc_dmat, ring->desc_map, BUS_DMASYNC_PREWRITE);

        return 0;

fail:   rt2860_free_tx_ring(sc, ring);
        return error;
}

void
rt2860_reset_tx_ring(struct rt2860_softc *sc, struct rt2860_tx_ring *ring)
{
        struct rt2860_tx_data *data;
        int i;

        for (i = 0; i < RT2860_TX_RING_COUNT; i++) {
                if ((data = ring->data[i]) == NULL)
                        continue;       /* nothing mapped in this slot */

                if (data->m != NULL) {
                        bus_dmamap_sync(sc->txwi_dmat, data->map,
                            BUS_DMASYNC_POSTWRITE);
                        bus_dmamap_unload(sc->txwi_dmat, data->map);
                        m_freem(data->m);
                        data->m = NULL;
                }
                if (data->ni != NULL) {
                        ieee80211_free_node(data->ni);
                        data->ni = NULL;
                }

                SLIST_INSERT_HEAD(&sc->data_pool, data, next);
                ring->data[i] = NULL;
        }

        ring->queued = 0;
        ring->cur = ring->next = 0;
}

void
rt2860_free_tx_ring(struct rt2860_softc *sc, struct rt2860_tx_ring *ring)
{
        struct rt2860_tx_data *data;
        int i;

        if (ring->txd != NULL) {
                bus_dmamap_sync(ring->desc_dmat, ring->desc_map,
                    BUS_DMASYNC_POSTWRITE);
                bus_dmamap_unload(ring->desc_dmat, ring->desc_map);
                bus_dmamem_free(ring->desc_dmat, ring->txd, ring->desc_map);
        }
        if (ring->desc_dmat != NULL)
                bus_dma_tag_destroy(ring->desc_dmat);

        for (i = 0; i < RT2860_TX_RING_COUNT; i++) {
                if ((data = ring->data[i]) == NULL)
                        continue;       /* nothing mapped in this slot */

                if (data->m != NULL) {
                        bus_dmamap_sync(sc->txwi_dmat, data->map,
                            BUS_DMASYNC_POSTWRITE);
                        bus_dmamap_unload(sc->txwi_dmat, data->map);
                        m_freem(data->m);
                }
                if (data->ni != NULL)
                        ieee80211_free_node(data->ni);

                SLIST_INSERT_HEAD(&sc->data_pool, data, next);
        }
}

/*
 * Allocate a pool of TX Wireless Information blocks.
 */
int
rt2860_alloc_tx_pool(struct rt2860_softc *sc)
{
        caddr_t vaddr;
        bus_addr_t paddr;
        int i, size, error;

        size = RT2860_TX_POOL_COUNT * RT2860_TXWI_DMASZ;

        /* init data_pool early in case of failure.. */
        SLIST_INIT(&sc->data_pool);

        error = bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), 1, 0,
            BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL,
            size, 1, size, 0, NULL, NULL, &sc->txwi_dmat);
        if (error != 0) {
                device_printf(sc->sc_dev, "could not create txwi DMA tag\n");
                goto fail;
        }

        error = bus_dmamem_alloc(sc->txwi_dmat, (void **)&sc->txwi_vaddr,
            BUS_DMA_NOWAIT | BUS_DMA_ZERO, &sc->txwi_map);
        if (error != 0) {
                device_printf(sc->sc_dev, "could not allocate DMA memory\n");
                goto fail;
        }

        error = bus_dmamap_load(sc->txwi_dmat, sc->txwi_map,
            sc->txwi_vaddr, size, rt2860_dma_map_addr, &paddr, 0);
        if (error != 0) {
                device_printf(sc->sc_dev, "could not load txwi DMA map\n");
                goto fail;
        }

        bus_dmamap_sync(sc->txwi_dmat, sc->txwi_map, BUS_DMASYNC_PREWRITE);

        vaddr = sc->txwi_vaddr;
        for (i = 0; i < RT2860_TX_POOL_COUNT; i++) {
                struct rt2860_tx_data *data = &sc->data[i];

                error = bus_dmamap_create(sc->txwi_dmat, 0, &data->map);
                if (error != 0) {
                        device_printf(sc->sc_dev, "could not create DMA map\n");
                        goto fail;
                }
                data->txwi = (struct rt2860_txwi *)vaddr;
                data->paddr = paddr;
                vaddr += RT2860_TXWI_DMASZ;
                paddr += RT2860_TXWI_DMASZ;

                SLIST_INSERT_HEAD(&sc->data_pool, data, next);
        }

        return 0;

fail:   rt2860_free_tx_pool(sc);
        return error;
}

void
rt2860_free_tx_pool(struct rt2860_softc *sc)
{
        if (sc->txwi_vaddr != NULL) {
                bus_dmamap_sync(sc->txwi_dmat, sc->txwi_map,
                    BUS_DMASYNC_POSTWRITE);
                bus_dmamap_unload(sc->txwi_dmat, sc->txwi_map);
                bus_dmamem_free(sc->txwi_dmat, sc->txwi_vaddr, sc->txwi_map);
        }
        if (sc->txwi_dmat != NULL)
                bus_dma_tag_destroy(sc->txwi_dmat);

        while (!SLIST_EMPTY(&sc->data_pool)) {
                struct rt2860_tx_data *data;
                data = SLIST_FIRST(&sc->data_pool);
                bus_dmamap_destroy(sc->txwi_dmat, data->map);
                SLIST_REMOVE_HEAD(&sc->data_pool, next);
        }
}

int
rt2860_alloc_rx_ring(struct rt2860_softc *sc, struct rt2860_rx_ring *ring)
{
        bus_addr_t physaddr;
        int i, size, error;

        size = RT2860_RX_RING_COUNT * sizeof (struct rt2860_rxd);

        error = bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), 16, 0,
            BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL,
            size, 1, size, 0, NULL, NULL, &ring->desc_dmat);
        if (error != 0) {
                device_printf(sc->sc_dev, "could not create desc DMA tag\n");
                goto fail;
        }

        error = bus_dmamem_alloc(ring->desc_dmat, (void **)&ring->rxd,
            BUS_DMA_NOWAIT | BUS_DMA_ZERO, &ring->desc_map);
        if (error != 0) {
                device_printf(sc->sc_dev, "could not allocate DMA memory\n");
                goto fail;
        }

        error = bus_dmamap_load(ring->desc_dmat, ring->desc_map, ring->rxd,
            size, rt2860_dma_map_addr, &ring->paddr, 0);
        if (error != 0) {
                device_printf(sc->sc_dev, "could not load desc DMA map\n");
                goto fail;
        }

        error = bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), 1, 0,
            BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL, MCLBYTES,
            1, MCLBYTES, 0, NULL, NULL, &ring->data_dmat);
        if (error != 0) {
                device_printf(sc->sc_dev, "could not create data DMA tag\n");
                goto fail;
        }

        for (i = 0; i < RT2860_RX_RING_COUNT; i++) {
                struct rt2860_rx_data *data = &ring->data[i];
                struct rt2860_rxd *rxd = &ring->rxd[i];

                error = bus_dmamap_create(ring->data_dmat, 0, &data->map);
                if (error != 0) {
                        device_printf(sc->sc_dev, "could not create DMA map\n");
                        goto fail;
                }

                data->m = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR);
                if (data->m == NULL) {
                        device_printf(sc->sc_dev,
                            "could not allocate rx mbuf\n");
                        error = ENOMEM;
                        goto fail;
                }

                error = bus_dmamap_load(ring->data_dmat, data->map,
                    mtod(data->m, void *), MCLBYTES, rt2860_dma_map_addr,
                    &physaddr, 0);
                if (error != 0) {
                        device_printf(sc->sc_dev,
                            "could not load rx buf DMA map");
                        goto fail;
                }

                rxd->sdp0 = htole32(physaddr);
                rxd->sdl0 = htole16(MCLBYTES);
        }

        bus_dmamap_sync(ring->desc_dmat, ring->desc_map, BUS_DMASYNC_PREWRITE);

        return 0;

fail:   rt2860_free_rx_ring(sc, ring);
        return error;
}

void
rt2860_reset_rx_ring(struct rt2860_softc *sc, struct rt2860_rx_ring *ring)
{
        int i;

        for (i = 0; i < RT2860_RX_RING_COUNT; i++)
                ring->rxd[i].sdl0 &= ~htole16(RT2860_RX_DDONE);

        bus_dmamap_sync(ring->desc_dmat, ring->desc_map, BUS_DMASYNC_PREWRITE);

        ring->cur = 0;
}

void
rt2860_free_rx_ring(struct rt2860_softc *sc, struct rt2860_rx_ring *ring)
{
        int i;

        if (ring->rxd != NULL) {
                bus_dmamap_sync(ring->desc_dmat, ring->desc_map,
                    BUS_DMASYNC_POSTWRITE);
                bus_dmamap_unload(ring->desc_dmat, ring->desc_map);
                bus_dmamem_free(ring->desc_dmat, ring->rxd, ring->desc_map);
        }
        if (ring->desc_dmat != NULL)
                bus_dma_tag_destroy(ring->desc_dmat);

        for (i = 0; i < RT2860_RX_RING_COUNT; i++) {
                struct rt2860_rx_data *data = &ring->data[i];

                if (data->m != NULL) {
                        bus_dmamap_sync(ring->data_dmat, data->map,
                            BUS_DMASYNC_POSTREAD);
                        bus_dmamap_unload(ring->data_dmat, data->map);
                        m_freem(data->m);
                }
                if (data->map != NULL)
                        bus_dmamap_destroy(ring->data_dmat, data->map);
        }
        if (ring->data_dmat != NULL)
                bus_dma_tag_destroy(ring->data_dmat);
}

static void
rt2860_updatestats(struct rt2860_softc *sc)
{
        struct ieee80211com *ic = &sc->sc_ic;

        /*
         * In IBSS or HostAP modes (when the hardware sends beacons), the
         * MAC can run into a livelock and start sending CTS-to-self frames
         * like crazy if protection is enabled.  Fortunately, we can detect
         * when such a situation occurs and reset the MAC.
         */
        if (ic->ic_curmode != IEEE80211_M_STA) {
                /* check if we're in a livelock situation.. */
                uint32_t tmp = RAL_READ(sc, RT2860_DEBUG);
                if ((tmp & (1 << 29)) && (tmp & (1 << 7 | 1 << 5))) {
                        /* ..and reset MAC/BBP for a while.. */
                        DPRINTF(("CTS-to-self livelock detected\n"));
                        RAL_WRITE(sc, RT2860_MAC_SYS_CTRL, RT2860_MAC_SRST);
                        RAL_BARRIER_WRITE(sc);
                        DELAY(1);
                        RAL_WRITE(sc, RT2860_MAC_SYS_CTRL,
                            RT2860_MAC_RX_EN | RT2860_MAC_TX_EN);
                }
        }
}

static void
rt2860_newassoc(struct ieee80211_node *ni, int isnew)
{
        struct ieee80211com *ic = ni->ni_ic;
        struct rt2860_softc *sc = ic->ic_softc;
        uint8_t wcid;

        wcid = IEEE80211_AID(ni->ni_associd);
        if (isnew && ni->ni_associd != 0) {
                sc->wcid2ni[wcid] = ni;

                /* init WCID table entry */
                RAL_WRITE_REGION_1(sc, RT2860_WCID_ENTRY(wcid),
                    ni->ni_macaddr, IEEE80211_ADDR_LEN);
        }
        DPRINTF(("new assoc isnew=%d addr=%s WCID=%d\n",
            isnew, ether_sprintf(ni->ni_macaddr), wcid));
}

static void
rt2860_node_free(struct ieee80211_node *ni)
{
        struct ieee80211com *ic = ni->ni_ic;
        struct rt2860_softc *sc = ic->ic_softc;
        uint8_t wcid;

        if (ni->ni_associd != 0) {
                wcid = IEEE80211_AID(ni->ni_associd);

                /* clear Rx WCID search table entry */
                RAL_SET_REGION_4(sc, RT2860_WCID_ENTRY(wcid), 0, 2);
        }
        sc->sc_node_free(ni);
}

#ifdef IEEE80211_HT
static int
rt2860_ampdu_rx_start(struct ieee80211com *ic, struct ieee80211_node *ni,
    uint8_t tid)
{
        struct rt2860_softc *sc = ic->ic_softc;
        uint8_t wcid = ((struct rt2860_node *)ni)->wcid;
        uint32_t tmp;

        /* update BA session mask */
        tmp = RAL_READ(sc, RT2860_WCID_ENTRY(wcid) + 4);
        tmp |= (1 << tid) << 16;
        RAL_WRITE(sc, RT2860_WCID_ENTRY(wcid) + 4, tmp);
        return 0;
}

static void
rt2860_ampdu_rx_stop(struct ieee80211com *ic, struct ieee80211_node *ni,
    uint8_t tid)
{
        struct rt2860_softc *sc = ic->ic_softc;
        uint8_t wcid = ((struct rt2860_node *)ni)->wcid;
        uint32_t tmp;

        /* update BA session mask */
        tmp = RAL_READ(sc, RT2860_WCID_ENTRY(wcid) + 4);
        tmp &= ~((1 << tid) << 16);
        RAL_WRITE(sc, RT2860_WCID_ENTRY(wcid) + 4, tmp);
}
#endif

static int
rt2860_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
{
        struct rt2860_vap *rvp = RT2860_VAP(vap);
        struct ieee80211com *ic = vap->iv_ic;
        struct rt2860_softc *sc = ic->ic_softc;
        uint32_t tmp;
        int error;

        if (vap->iv_state == IEEE80211_S_RUN) {
                /* turn link LED off */
                rt2860_set_leds(sc, RT2860_LED_RADIO);
        }

        if (nstate == IEEE80211_S_INIT && vap->iv_state == IEEE80211_S_RUN) {
                /* abort TSF synchronization */
                tmp = RAL_READ(sc, RT2860_BCN_TIME_CFG);
                RAL_WRITE(sc, RT2860_BCN_TIME_CFG,
                    tmp & ~(RT2860_BCN_TX_EN | RT2860_TSF_TIMER_EN |
                    RT2860_TBTT_TIMER_EN));
        }

        rt2860_set_gp_timer(sc, 0);

        error = rvp->ral_newstate(vap, nstate, arg);
        if (error != 0)
                return (error);

        if (nstate == IEEE80211_S_RUN) {
                struct ieee80211_node *ni = vap->iv_bss;

                if (ic->ic_opmode != IEEE80211_M_MONITOR) {
                        rt2860_enable_mrr(sc);
                        rt2860_set_txpreamble(sc);
                        rt2860_set_basicrates(sc, &ni->ni_rates);
                        rt2860_set_bssid(sc, ni->ni_bssid);
                }

                if (vap->iv_opmode == IEEE80211_M_HOSTAP ||
                    vap->iv_opmode == IEEE80211_M_IBSS ||
                    vap->iv_opmode == IEEE80211_M_MBSS) {
                        error = rt2860_setup_beacon(sc, vap);
                        if (error != 0)
                                return error;
                }

                if (ic->ic_opmode != IEEE80211_M_MONITOR) {
                        rt2860_enable_tsf_sync(sc);
                        rt2860_set_gp_timer(sc, 500);
                }

                /* turn link LED on */
                rt2860_set_leds(sc, RT2860_LED_RADIO |
                    (IEEE80211_IS_CHAN_2GHZ(ni->ni_chan) ?
                     RT2860_LED_LINK_2GHZ : RT2860_LED_LINK_5GHZ));
        }
        return error;
}

/* Read 16-bit from eFUSE ROM (>=RT3071 only.) */
static uint16_t
rt3090_efuse_read_2(struct rt2860_softc *sc, uint16_t addr)
{
        uint32_t tmp;
        uint16_t reg;
        int ntries;

        addr *= 2;
        /*-
         * Read one 16-byte block into registers EFUSE_DATA[0-3]:
         * DATA0: F E D C
         * DATA1: B A 9 8
         * DATA2: 7 6 5 4
         * DATA3: 3 2 1 0
         */
        tmp = RAL_READ(sc, RT3070_EFUSE_CTRL);
        tmp &= ~(RT3070_EFSROM_MODE_MASK | RT3070_EFSROM_AIN_MASK);
        tmp |= (addr & ~0xf) << RT3070_EFSROM_AIN_SHIFT | RT3070_EFSROM_KICK;
        RAL_WRITE(sc, RT3070_EFUSE_CTRL, tmp);
        for (ntries = 0; ntries < 500; ntries++) {
                tmp = RAL_READ(sc, RT3070_EFUSE_CTRL);
                if (!(tmp & RT3070_EFSROM_KICK))
                        break;
                DELAY(2);
        }
        if (ntries == 500)
                return 0xffff;

        if ((tmp & RT3070_EFUSE_AOUT_MASK) == RT3070_EFUSE_AOUT_MASK)
                return 0xffff;  /* address not found */

        /* determine to which 32-bit register our 16-bit word belongs */
        reg = RT3070_EFUSE_DATA3 - (addr & 0xc);
        tmp = RAL_READ(sc, reg);

        return (addr & 2) ? tmp >> 16 : tmp & 0xffff;
}

/*
 * Read 16 bits at address 'addr' from the serial EEPROM (either 93C46,
 * 93C66 or 93C86).
 */
static uint16_t
rt2860_eeprom_read_2(struct rt2860_softc *sc, uint16_t addr)
{
        uint32_t tmp;
        uint16_t val;
        int n;

        /* clock C once before the first command */
        RT2860_EEPROM_CTL(sc, 0);

        RT2860_EEPROM_CTL(sc, RT2860_S);
        RT2860_EEPROM_CTL(sc, RT2860_S | RT2860_C);
        RT2860_EEPROM_CTL(sc, RT2860_S);

        /* write start bit (1) */
        RT2860_EEPROM_CTL(sc, RT2860_S | RT2860_D);
        RT2860_EEPROM_CTL(sc, RT2860_S | RT2860_D | RT2860_C);

        /* write READ opcode (10) */
        RT2860_EEPROM_CTL(sc, RT2860_S | RT2860_D);
        RT2860_EEPROM_CTL(sc, RT2860_S | RT2860_D | RT2860_C);
        RT2860_EEPROM_CTL(sc, RT2860_S);
        RT2860_EEPROM_CTL(sc, RT2860_S | RT2860_C);

        /* write address (A5-A0 or A7-A0) */
        n = ((RAL_READ(sc, RT2860_PCI_EECTRL) & 0x30) == 0) ? 5 : 7;
        for (; n >= 0; n--) {
                RT2860_EEPROM_CTL(sc, RT2860_S |
                    (((addr >> n) & 1) << RT2860_SHIFT_D));
                RT2860_EEPROM_CTL(sc, RT2860_S |
                    (((addr >> n) & 1) << RT2860_SHIFT_D) | RT2860_C);
        }

        RT2860_EEPROM_CTL(sc, RT2860_S);

        /* read data Q15-Q0 */
        val = 0;
        for (n = 15; n >= 0; n--) {
                RT2860_EEPROM_CTL(sc, RT2860_S | RT2860_C);
                tmp = RAL_READ(sc, RT2860_PCI_EECTRL);
                val |= ((tmp & RT2860_Q) >> RT2860_SHIFT_Q) << n;
                RT2860_EEPROM_CTL(sc, RT2860_S);
        }

        RT2860_EEPROM_CTL(sc, 0);

        /* clear Chip Select and clock C */
        RT2860_EEPROM_CTL(sc, RT2860_S);
        RT2860_EEPROM_CTL(sc, 0);
        RT2860_EEPROM_CTL(sc, RT2860_C);

        return val;
}

static __inline uint16_t
rt2860_srom_read(struct rt2860_softc *sc, uint8_t addr)
{
        /* either eFUSE ROM or EEPROM */
        return sc->sc_srom_read(sc, addr);
}

static void
rt2860_intr_coherent(struct rt2860_softc *sc)
{
        uint32_t tmp;

        /* DMA finds data coherent event when checking the DDONE bit */

        DPRINTF(("Tx/Rx Coherent interrupt\n"));

        /* restart DMA engine */
        tmp = RAL_READ(sc, RT2860_WPDMA_GLO_CFG);
        tmp &= ~(RT2860_TX_WB_DDONE | RT2860_RX_DMA_EN | RT2860_TX_DMA_EN);
        RAL_WRITE(sc, RT2860_WPDMA_GLO_CFG, tmp);

        (void)rt2860_txrx_enable(sc);
}

static void
rt2860_drain_stats_fifo(struct rt2860_softc *sc)
{
        struct ieee80211_ratectl_tx_status *txs = &sc->sc_txs;
        struct ieee80211_node *ni;
        uint32_t stat;
        uint8_t wcid, mcs, pid;

        /* drain Tx status FIFO (maxsize = 16) */
        txs->flags = IEEE80211_RATECTL_STATUS_LONG_RETRY;
        while ((stat = RAL_READ(sc, RT2860_TX_STAT_FIFO)) & RT2860_TXQ_VLD) {
                DPRINTFN(4, ("tx stat 0x%08x\n", stat));

                wcid = (stat >> RT2860_TXQ_WCID_SHIFT) & 0xff;
                if (wcid > RT2860_WCID_MAX)
                        continue;
                ni = sc->wcid2ni[wcid];

                /* if no ACK was requested, no feedback is available */
                if (!(stat & RT2860_TXQ_ACKREQ) || ni == NULL)
                        continue;

                /* update per-STA AMRR stats */
                if (stat & RT2860_TXQ_OK) {
                        /*
                         * Check if there were retries, ie if the Tx success
                         * rate is different from the requested rate.  Note
                         * that it works only because we do not allow rate
                         * fallback from OFDM to CCK.
                         */
                        mcs = (stat >> RT2860_TXQ_MCS_SHIFT) & 0x7f;
                        pid = (stat >> RT2860_TXQ_PID_SHIFT) & 0xf;
                        if (mcs + 1 != pid)
                                txs->long_retries = 1;
                        else
                                txs->long_retries = 0;
                        txs->status = IEEE80211_RATECTL_TX_SUCCESS;
                        ieee80211_ratectl_tx_complete(ni, txs);
                } else {
                        txs->status = IEEE80211_RATECTL_TX_FAIL_UNSPECIFIED;
                        txs->long_retries = 1;  /* XXX */
                        ieee80211_ratectl_tx_complete(ni, txs);
                        if_inc_counter(ni->ni_vap->iv_ifp,
                            IFCOUNTER_OERRORS, 1);
                }
        }
}

static void
rt2860_tx_intr(struct rt2860_softc *sc, int qid)
{
        struct rt2860_tx_ring *ring = &sc->txq[qid];
        uint32_t hw;

        rt2860_drain_stats_fifo(sc);

        hw = RAL_READ(sc, RT2860_TX_DTX_IDX(qid));
        while (ring->next != hw) {
                struct rt2860_tx_data *data = ring->data[ring->next];

                if (data != NULL) {
                        bus_dmamap_sync(sc->txwi_dmat, data->map,
                            BUS_DMASYNC_POSTWRITE);
                        bus_dmamap_unload(sc->txwi_dmat, data->map);
                        ieee80211_tx_complete(data->ni, data->m, 0);
                        data->ni = NULL;
                        data->m = NULL;
                        SLIST_INSERT_HEAD(&sc->data_pool, data, next);
                        ring->data[ring->next] = NULL;
                }
                ring->queued--;
                ring->next = (ring->next + 1) % RT2860_TX_RING_COUNT;
        }

        sc->sc_tx_timer = 0;
        if (ring->queued < RT2860_TX_RING_COUNT)
                sc->qfullmsk &= ~(1 << qid);
        rt2860_start(sc);
}

/*
 * Return the Rx chain with the highest RSSI for a given frame.
 */
static __inline uint8_t
rt2860_maxrssi_chain(struct rt2860_softc *sc, const struct rt2860_rxwi *rxwi)
{
        uint8_t rxchain = 0;

        if (sc->nrxchains > 1) {
                if (rxwi->rssi[1] > rxwi->rssi[rxchain])
                        rxchain = 1;
                if (sc->nrxchains > 2)
                        if (rxwi->rssi[2] > rxwi->rssi[rxchain])
                                rxchain = 2;
        }
        return rxchain;
}

static void
rt2860_rx_intr(struct rt2860_softc *sc)
{
        struct rt2860_rx_radiotap_header *tap;
        struct ieee80211com *ic = &sc->sc_ic;
        struct ieee80211_frame *wh;
        struct ieee80211_node *ni;
        struct mbuf *m, *m1;
        bus_addr_t physaddr;
        uint32_t hw;
        uint16_t phy;
        uint8_t ant;
        int8_t rssi, nf;
        int error;

        hw = RAL_READ(sc, RT2860_FS_DRX_IDX) & 0xfff;
        while (sc->rxq.cur != hw) {
                struct rt2860_rx_data *data = &sc->rxq.data[sc->rxq.cur];
                struct rt2860_rxd *rxd = &sc->rxq.rxd[sc->rxq.cur];
                struct rt2860_rxwi *rxwi;

                bus_dmamap_sync(sc->rxq.desc_dmat, sc->rxq.desc_map,
                    BUS_DMASYNC_POSTREAD);

                if (__predict_false(!(rxd->sdl0 & htole16(RT2860_RX_DDONE)))) {
                        DPRINTF(("RXD DDONE bit not set!\n"));
                        break;  /* should not happen */
                }

                if (__predict_false(rxd->flags &
                    htole32(RT2860_RX_CRCERR | RT2860_RX_ICVERR))) {
                        counter_u64_add(ic->ic_ierrors, 1);
                        goto skip;
                }

#ifdef HW_CRYPTO
                if (__predict_false(rxd->flags & htole32(RT2860_RX_MICERR))) {
                        /* report MIC failures to net80211 for TKIP */
                        ic->ic_stats.is_rx_locmicfail++;
                        ieee80211_michael_mic_failure(ic, 0/* XXX */);
                        counter_u64_add(ic->ic_ierrors, 1);
                        goto skip;
                }
#endif

                m1 = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR);
                if (__predict_false(m1 == NULL)) {
                        counter_u64_add(ic->ic_ierrors, 1);
                        goto skip;
                }

                bus_dmamap_sync(sc->rxq.data_dmat, data->map,
                    BUS_DMASYNC_POSTREAD);
                bus_dmamap_unload(sc->rxq.data_dmat, data->map);

                error = bus_dmamap_load(sc->rxq.data_dmat, data->map,
                    mtod(m1, void *), MCLBYTES, rt2860_dma_map_addr,
                    &physaddr, 0);
                if (__predict_false(error != 0)) {
                        m_freem(m1);

                        /* try to reload the old mbuf */
                        error = bus_dmamap_load(sc->rxq.data_dmat, data->map,
                            mtod(data->m, void *), MCLBYTES,
                            rt2860_dma_map_addr, &physaddr, 0);
                        if (__predict_false(error != 0)) {
                                panic("%s: could not load old rx mbuf",
                                    device_get_name(sc->sc_dev));
                        }
                        /* physical address may have changed */
                        rxd->sdp0 = htole32(physaddr);
                        counter_u64_add(ic->ic_ierrors, 1);
                        goto skip;
                }

                /*
                 * New mbuf successfully loaded, update Rx ring and continue
                 * processing.
                 */
                m = data->m;
                data->m = m1;
                rxd->sdp0 = htole32(physaddr);

                rxwi = mtod(m, struct rt2860_rxwi *);

                /* finalize mbuf */
                m->m_data = (caddr_t)(rxwi + 1);
                m->m_pkthdr.len = m->m_len = le16toh(rxwi->len) & 0xfff;

                wh = mtod(m, struct ieee80211_frame *);
#ifdef HW_CRYPTO
                if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) {
                        /* frame is decrypted by hardware */
                        wh->i_fc[1] &= ~IEEE80211_FC1_PROTECTED;
                }
#endif

                /* HW may insert 2 padding bytes after 802.11 header */
                if (rxd->flags & htole32(RT2860_RX_L2PAD)) {
                        u_int hdrlen = ieee80211_hdrsize(wh);
                        ovbcopy(wh, (caddr_t)wh + 2, hdrlen);
                        m->m_data += 2;
                        wh = mtod(m, struct ieee80211_frame *);
                }

                ant = rt2860_maxrssi_chain(sc, rxwi);
                rssi = rt2860_rssi2dbm(sc, rxwi->rssi[ant], ant);
                nf = RT2860_NOISE_FLOOR;

                if (ieee80211_radiotap_active(ic)) {
                        tap = &sc->sc_rxtap;
                        tap->wr_flags = 0;
                        tap->wr_antenna = ant;
                        tap->wr_antsignal = nf + rssi;
                        tap->wr_antnoise = nf;
                        /* in case it can't be found below */
                        tap->wr_rate = 2;
                        phy = le16toh(rxwi->phy);
                        switch (phy & RT2860_PHY_MODE) {
                        case RT2860_PHY_CCK:
                                switch ((phy & RT2860_PHY_MCS) & ~RT2860_PHY_SHPRE) {
                                case 0: tap->wr_rate =   2; break;
                                case 1: tap->wr_rate =   4; break;
                                case 2: tap->wr_rate =  11; break;
                                case 3: tap->wr_rate =  22; break;
                                }
                                if (phy & RT2860_PHY_SHPRE)
                                        tap->wr_flags |= IEEE80211_RADIOTAP_F_SHORTPRE;
                                break;
                        case RT2860_PHY_OFDM:
                                switch (phy & RT2860_PHY_MCS) {
                                case 0: tap->wr_rate =  12; break;
                                case 1: tap->wr_rate =  18; break;
                                case 2: tap->wr_rate =  24; break;
                                case 3: tap->wr_rate =  36; break;
                                case 4: tap->wr_rate =  48; break;
                                case 5: tap->wr_rate =  72; break;
                                case 6: tap->wr_rate =  96; break;
                                case 7: tap->wr_rate = 108; break;
                                }
                                break;
                        }
                }

                RAL_UNLOCK(sc);
                wh = mtod(m, struct ieee80211_frame *);

                /* send the frame to the 802.11 layer */
                ni = ieee80211_find_rxnode(ic,
                    (struct ieee80211_frame_min *)wh);
                if (ni != NULL) {
                        (void)ieee80211_input(ni, m, rssi - nf, nf);
                        ieee80211_free_node(ni);
                } else
                        (void)ieee80211_input_all(ic, m, rssi - nf, nf);

                RAL_LOCK(sc);

skip:           rxd->sdl0 &= ~htole16(RT2860_RX_DDONE);

                bus_dmamap_sync(sc->rxq.desc_dmat, sc->rxq.desc_map,
                    BUS_DMASYNC_PREWRITE);

                sc->rxq.cur = (sc->rxq.cur + 1) % RT2860_RX_RING_COUNT;
        }

        /* tell HW what we have processed */
        RAL_WRITE(sc, RT2860_RX_CALC_IDX,
            (sc->rxq.cur - 1) % RT2860_RX_RING_COUNT);
}

static void
rt2860_tbtt_intr(struct rt2860_softc *sc)
{
#if 0
        struct ieee80211com *ic = &sc->sc_ic;

#ifndef IEEE80211_STA_ONLY
        if (ic->ic_opmode == IEEE80211_M_HOSTAP) {
                /* one less beacon until next DTIM */
                if (ic->ic_dtim_count == 0)
                        ic->ic_dtim_count = ic->ic_dtim_period - 1;
                else
                        ic->ic_dtim_count--;

                /* update dynamic parts of beacon */
                rt2860_setup_beacon(sc);

                /* flush buffered multicast frames */
                if (ic->ic_dtim_count == 0)
                        ieee80211_notify_dtim(ic);
        }
#endif
        /* check if protection mode has changed */
        if ((sc->sc_ic_flags ^ ic->ic_flags) & IEEE80211_F_USEPROT) {
                rt2860_updateprot(sc);
                sc->sc_ic_flags = ic->ic_flags;
        }
#endif
}

static void
rt2860_gp_intr(struct rt2860_softc *sc)
{
        struct ieee80211com *ic = &sc->sc_ic;
        struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps);

        DPRINTFN(2, ("GP timeout state=%d\n", vap->iv_state));

        if (vap->iv_state == IEEE80211_S_RUN)
                rt2860_updatestats(sc);
}

void
rt2860_intr(void *arg)
{
        struct rt2860_softc *sc = arg;
        uint32_t r;

        RAL_LOCK(sc);

        r = RAL_READ(sc, RT2860_INT_STATUS);
        if (__predict_false(r == 0xffffffff)) {
                RAL_UNLOCK(sc);
                return; /* device likely went away */
        }
        if (r == 0) {
                RAL_UNLOCK(sc);
                return; /* not for us */
        }

        /* acknowledge interrupts */
        RAL_WRITE(sc, RT2860_INT_STATUS, r);

        if (r & RT2860_TX_RX_COHERENT)
                rt2860_intr_coherent(sc);

        if (r & RT2860_MAC_INT_2)       /* TX status */
                rt2860_drain_stats_fifo(sc);

        if (r & RT2860_TX_DONE_INT5)
                rt2860_tx_intr(sc, 5);

        if (r & RT2860_RX_DONE_INT)
                rt2860_rx_intr(sc);

        if (r & RT2860_TX_DONE_INT4)
                rt2860_tx_intr(sc, 4);

        if (r & RT2860_TX_DONE_INT3)
                rt2860_tx_intr(sc, 3);

        if (r & RT2860_TX_DONE_INT2)
                rt2860_tx_intr(sc, 2);

        if (r & RT2860_TX_DONE_INT1)
                rt2860_tx_intr(sc, 1);

        if (r & RT2860_TX_DONE_INT0)
                rt2860_tx_intr(sc, 0);

        if (r & RT2860_MAC_INT_0)       /* TBTT */
                rt2860_tbtt_intr(sc);

        if (r & RT2860_MAC_INT_3)       /* Auto wakeup */
                /* TBD wakeup */;

        if (r & RT2860_MAC_INT_4)       /* GP timer */
                rt2860_gp_intr(sc);

        RAL_UNLOCK(sc);
}

static int
rt2860_tx(struct rt2860_softc *sc, struct mbuf *m, struct ieee80211_node *ni)
{
        struct ieee80211com *ic = &sc->sc_ic;
        struct ieee80211vap *vap = ni->ni_vap;
        struct rt2860_tx_ring *ring;
        struct rt2860_tx_data *data;
        struct rt2860_txd *txd;
        struct rt2860_txwi *txwi;
        struct ieee80211_frame *wh;
        const struct ieee80211_txparam *tp = ni->ni_txparms;
        struct ieee80211_key *k;
        struct mbuf *m1;
        bus_dma_segment_t segs[RT2860_MAX_SCATTER];
        bus_dma_segment_t *seg;
        u_int hdrlen;
        uint16_t qos, dur;
        uint8_t type, qsel, mcs, pid, qid;
        int i, nsegs, ntxds, pad, rate, ridx, error;

        /* the data pool contains at least one element, pick the first */
        data = SLIST_FIRST(&sc->data_pool);

        wh = mtod(m, struct ieee80211_frame *);

        ieee80211_output_seqno_assign(ni, -1, m);
        if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) {
                k = ieee80211_crypto_encap(ni, m);
                if (k == NULL) {
                        m_freem(m);
                        return ENOBUFS;
                }

                /* packet header may have moved, reset our local pointer */
                wh = mtod(m, struct ieee80211_frame *);
        }

        hdrlen = ieee80211_anyhdrsize(wh);
        type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK;

        if (m->m_flags & M_EAPOL) {
                rate = tp->mgmtrate;
        } else if (IEEE80211_IS_MULTICAST(wh->i_addr1)) {
                rate = tp->mcastrate;
        } else if (tp->ucastrate != IEEE80211_FIXED_RATE_NONE) {
                rate = tp->ucastrate;
        } else {
                (void) ieee80211_ratectl_rate(ni, NULL, 0);
                rate = ieee80211_node_get_txrate_dot11rate(ni);
        }
        rate &= IEEE80211_RATE_VAL;

        qid = M_WME_GETAC(m);
        if (IEEE80211_QOS_HAS_SEQ(wh)) {
                qos = ((const struct ieee80211_qosframe *)wh)->i_qos[0];
        } else {
                qos = 0;
        }
        ring = &sc->txq[qid];
        ridx = ieee80211_legacy_rate_lookup(ic->ic_rt, rate);

        /* get MCS code from rate index */
        mcs = rt2860_rates[ridx].mcs;

        /* setup TX Wireless Information */
        txwi = data->txwi;
        txwi->flags = 0;
        /* let HW generate seq numbers for non-QoS frames */
        txwi->xflags = qos ? 0 : RT2860_TX_NSEQ;
        if (type == IEEE80211_FC0_TYPE_DATA)
                txwi->wcid = IEEE80211_AID(ni->ni_associd);
        else
                txwi->wcid = 0xff;
        txwi->len = htole16(m->m_pkthdr.len);
        if (rt2860_rates[ridx].phy == IEEE80211_T_DS) {
                txwi->phy = htole16(RT2860_PHY_CCK);
                if (ridx != RT2860_RIDX_CCK1 &&
                    (ic->ic_flags & IEEE80211_F_SHPREAMBLE))
                        mcs |= RT2860_PHY_SHPRE;
        } else
                txwi->phy = htole16(RT2860_PHY_OFDM);
        txwi->phy |= htole16(mcs);

        /*
         * We store the MCS code into the driver-private PacketID field.
         * The PacketID is latched into TX_STAT_FIFO when Tx completes so
         * that we know at which initial rate the frame was transmitted.
         * We add 1 to the MCS code because setting the PacketID field to
         * 0 means that we don't want feedback in TX_STAT_FIFO.
         */
        pid = (mcs + 1) & 0xf;
        txwi->len |= htole16(pid << RT2860_TX_PID_SHIFT);

        /* check if RTS/CTS or CTS-to-self protection is required */
        if (!IEEE80211_IS_MULTICAST(wh->i_addr1) &&
            (m->m_pkthdr.len + IEEE80211_CRC_LEN > vap->iv_rtsthreshold ||
             ((ic->ic_flags & IEEE80211_F_USEPROT) &&
              rt2860_rates[ridx].phy == IEEE80211_T_OFDM)))
                txwi->txop = RT2860_TX_TXOP_HT;
        else
                txwi->txop = RT2860_TX_TXOP_BACKOFF;

        if (!IEEE80211_IS_MULTICAST(wh->i_addr1) &&
            (!qos || (qos & IEEE80211_QOS_ACKPOLICY) !=
             IEEE80211_QOS_ACKPOLICY_NOACK)) {
                txwi->xflags |= RT2860_TX_ACK;

                if (ic->ic_flags & IEEE80211_F_SHPREAMBLE)
                        dur = rt2860_rates[ridx].sp_ack_dur;
                else
                        dur = rt2860_rates[ridx].lp_ack_dur;
                *(uint16_t *)wh->i_dur = htole16(dur);
        }
        /* ask MAC to insert timestamp into probe responses */
        if (IEEE80211_IS_MGMT_PROBE_RESP(wh))
            /* NOTE: beacons do not pass through tx_data() */
                txwi->flags |= RT2860_TX_TS;

        if (ieee80211_radiotap_active_vap(vap)) {
                struct rt2860_tx_radiotap_header *tap = &sc->sc_txtap;

                tap->wt_flags = 0;
                tap->wt_rate = rate;
                if (mcs & RT2860_PHY_SHPRE)
                        tap->wt_flags |= IEEE80211_RADIOTAP_F_SHORTPRE;

                ieee80211_radiotap_tx(vap, m);
        }

        pad = (hdrlen + 3) & ~3;

        /* copy and trim 802.11 header */
        memcpy(txwi + 1, wh, hdrlen);
        m_adj(m, hdrlen);

        error = bus_dmamap_load_mbuf_sg(sc->txwi_dmat, data->map, m, segs,
            &nsegs, 0);
        if (__predict_false(error != 0 && error != EFBIG)) {
                device_printf(sc->sc_dev, "can't map mbuf (error %d)\n",
                    error);
                m_freem(m);
                return error;
        }
        if (__predict_true(error == 0)) {
                /* determine how many TXDs are required */
                ntxds = 1 + (nsegs / 2);

                if (ring->queued + ntxds >= RT2860_TX_RING_COUNT) {
                        /* not enough free TXDs, force mbuf defrag */
                        bus_dmamap_unload(sc->txwi_dmat, data->map);
                        error = EFBIG;
                }
        }
        if (__predict_false(error != 0)) {
                m1 = m_defrag(m, M_NOWAIT);
                if (m1 == NULL) {
                        device_printf(sc->sc_dev,
                            "could not defragment mbuf\n");
                        m_freem(m);
                        return ENOBUFS;
                }
                m = m1;

                error = bus_dmamap_load_mbuf_sg(sc->txwi_dmat, data->map, m,
                    segs, &nsegs, 0);
                if (__predict_false(error != 0)) {
                        device_printf(sc->sc_dev, "can't map mbuf (error %d)\n",
                            error);
                        m_freem(m);
                        return error;
                }

                /* determine how many TXDs are now required */
                ntxds = 1 + (nsegs / 2);

                if (ring->queued + ntxds >= RT2860_TX_RING_COUNT) {
                        /* this is a hopeless case, drop the mbuf! */
                        bus_dmamap_unload(sc->txwi_dmat, data->map);
                        m_freem(m);
                        return ENOBUFS;
                }
        }

        qsel = (qid < WME_NUM_AC) ? RT2860_TX_QSEL_EDCA : RT2860_TX_QSEL_MGMT;

        /* first segment is TXWI + 802.11 header */
        txd = &ring->txd[ring->cur];
        txd->sdp0 = htole32(data->paddr);
        txd->sdl0 = htole16(sizeof (struct rt2860_txwi) + pad);
        txd->flags = qsel;

        /* setup payload segments */
        seg = &segs[0];
        for (i = nsegs; i >= 2; i -= 2) {
                txd->sdp1 = htole32(seg->ds_addr);
                txd->sdl1 = htole16(seg->ds_len);
                seg++;
                ring->cur = (ring->cur + 1) % RT2860_TX_RING_COUNT;
                /* grab a new Tx descriptor */
                txd = &ring->txd[ring->cur];
                txd->sdp0 = htole32(seg->ds_addr);
                txd->sdl0 = htole16(seg->ds_len);
                txd->flags = qsel;
                seg++;
        }
        /* finalize last segment */
        if (i > 0) {
                txd->sdp1 = htole32(seg->ds_addr);
                txd->sdl1 = htole16(seg->ds_len | RT2860_TX_LS1);
        } else {
                txd->sdl0 |= htole16(RT2860_TX_LS0);
                txd->sdl1 = 0;
        }

        /* remove from the free pool and link it into the SW Tx slot */
        SLIST_REMOVE_HEAD(&sc->data_pool, next);
        data->m = m;
        data->ni = ni;
        ring->data[ring->cur] = data;

        bus_dmamap_sync(sc->txwi_dmat, sc->txwi_map, BUS_DMASYNC_PREWRITE);
        bus_dmamap_sync(sc->txwi_dmat, data->map, BUS_DMASYNC_PREWRITE);
        bus_dmamap_sync(ring->desc_dmat, ring->desc_map, BUS_DMASYNC_PREWRITE);

        DPRINTFN(4, ("sending frame qid=%d wcid=%d nsegs=%d ridx=%d\n",
            qid, txwi->wcid, nsegs, ridx));

        ring->cur = (ring->cur + 1) % RT2860_TX_RING_COUNT;
        ring->queued += ntxds;
        if (ring->queued >= RT2860_TX_RING_COUNT)
                sc->qfullmsk |= 1 << qid;

        /* kick Tx */
        RAL_WRITE(sc, RT2860_TX_CTX_IDX(qid), ring->cur);

        return 0;
}

static int
rt2860_raw_xmit(struct ieee80211_node *ni, struct mbuf *m,
    const struct ieee80211_bpf_params *params)
{
        struct ieee80211com *ic = ni->ni_ic;
        struct rt2860_softc *sc = ic->ic_softc;
        int error;

        RAL_LOCK(sc);

        /* prevent management frames from being sent if we're not ready */
        if (!(sc->sc_flags & RT2860_RUNNING)) {
                RAL_UNLOCK(sc);
                m_freem(m);
                return ENETDOWN;
        }
        if (params == NULL) {
                /*
                 * Legacy path; interpret frame contents to decide
                 * precisely how to send the frame.
                 */
                error = rt2860_tx(sc, m, ni);
        } else {
                /*
                 * Caller supplied explicit parameters to use in
                 * sending the frame.
                 */
                error = rt2860_tx_raw(sc, m, ni, params);
        }
        sc->sc_tx_timer = 5;
        RAL_UNLOCK(sc);
        return error;
}

static int
rt2860_tx_raw(struct rt2860_softc *sc, struct mbuf *m,
    struct ieee80211_node *ni, const struct ieee80211_bpf_params *params)
{
        struct ieee80211com *ic = &sc->sc_ic;
        struct ieee80211vap *vap = ni->ni_vap;
        struct rt2860_tx_ring *ring;
        struct rt2860_tx_data *data;
        struct rt2860_txd *txd;
        struct rt2860_txwi *txwi;
        struct ieee80211_frame *wh;
        struct mbuf *m1;
        bus_dma_segment_t segs[RT2860_MAX_SCATTER];
        bus_dma_segment_t *seg;
        u_int hdrlen;
        uint16_t dur;
        uint8_t qsel, mcs, pid, qid;
        int i, nsegs, ntxds, pad, rate, ridx, error;

        /* the data pool contains at least one element, pick the first */
        data = SLIST_FIRST(&sc->data_pool);

        wh = mtod(m, struct ieee80211_frame *);
        hdrlen = ieee80211_hdrsize(wh);

        /* Choose a TX rate index. */
        rate = params->ibp_rate0;
        ridx = ieee80211_legacy_rate_lookup(ic->ic_rt,
            rate & IEEE80211_RATE_VAL);
        if (ridx == (uint8_t)-1) {
                /* XXX fall back to mcast/mgmt rate? */
                m_freem(m);
                return EINVAL;
        }

        qid = params->ibp_pri & 3;
        ring = &sc->txq[qid];

        /* get MCS code from rate index */
        mcs = rt2860_rates[ridx].mcs;

        /* setup TX Wireless Information */
        txwi = data->txwi;
        txwi->flags = 0;
        /* let HW generate seq numbers for non-QoS frames */
        txwi->xflags = params->ibp_pri & 3 ? 0 : RT2860_TX_NSEQ;
        txwi->wcid = 0xff;
        txwi->len = htole16(m->m_pkthdr.len);
        if (rt2860_rates[ridx].phy == IEEE80211_T_DS) {
                txwi->phy = htole16(RT2860_PHY_CCK);
                if (ridx != RT2860_RIDX_CCK1 &&
                    (ic->ic_flags & IEEE80211_F_SHPREAMBLE))
                        mcs |= RT2860_PHY_SHPRE;
        } else
                txwi->phy = htole16(RT2860_PHY_OFDM);
        txwi->phy |= htole16(mcs);

        /*
         * We store the MCS code into the driver-private PacketID field.
         * The PacketID is latched into TX_STAT_FIFO when Tx completes so
         * that we know at which initial rate the frame was transmitted.
         * We add 1 to the MCS code because setting the PacketID field to
         * 0 means that we don't want feedback in TX_STAT_FIFO.
         */
        pid = (mcs + 1) & 0xf;
        txwi->len |= htole16(pid << RT2860_TX_PID_SHIFT);

        /* check if RTS/CTS or CTS-to-self protection is required */
        if (params->ibp_flags & IEEE80211_BPF_RTS ||
            params->ibp_flags & IEEE80211_BPF_CTS)
                txwi->txop = RT2860_TX_TXOP_HT;
        else
                txwi->txop = RT2860_TX_TXOP_BACKOFF;
        if ((params->ibp_flags & IEEE80211_BPF_NOACK) == 0) {
                txwi->xflags |= RT2860_TX_ACK;

                if (ic->ic_flags & IEEE80211_F_SHPREAMBLE)
                        dur = rt2860_rates[ridx].sp_ack_dur;
                else
                        dur = rt2860_rates[ridx].lp_ack_dur;
                *(uint16_t *)wh->i_dur = htole16(dur);
        }
        /* ask MAC to insert timestamp into probe responses */
        if (IEEE80211_IS_MGMT_PROBE_RESP(wh))
            /* NOTE: beacons do not pass through tx_data() */
                txwi->flags |= RT2860_TX_TS;

        if (ieee80211_radiotap_active_vap(vap)) {
                struct rt2860_tx_radiotap_header *tap = &sc->sc_txtap;

                tap->wt_flags = 0;
                tap->wt_rate = rate;
                if (mcs & RT2860_PHY_SHPRE)
                        tap->wt_flags |= IEEE80211_RADIOTAP_F_SHORTPRE;

                ieee80211_radiotap_tx(vap, m);
        }

        pad = (hdrlen + 3) & ~3;

        /* copy and trim 802.11 header */
        memcpy(txwi + 1, wh, hdrlen);
        m_adj(m, hdrlen);

        error = bus_dmamap_load_mbuf_sg(sc->txwi_dmat, data->map, m, segs,
            &nsegs, 0);
        if (__predict_false(error != 0 && error != EFBIG)) {
                device_printf(sc->sc_dev, "can't map mbuf (error %d)\n",
                    error);
                m_freem(m);
                return error;
        }
        if (__predict_true(error == 0)) {
                /* determine how many TXDs are required */
                ntxds = 1 + (nsegs / 2);

                if (ring->queued + ntxds >= RT2860_TX_RING_COUNT) {
                        /* not enough free TXDs, force mbuf defrag */
                        bus_dmamap_unload(sc->txwi_dmat, data->map);
                        error = EFBIG;
                }
        }
        if (__predict_false(error != 0)) {
                m1 = m_defrag(m, M_NOWAIT);
                if (m1 == NULL) {
                        device_printf(sc->sc_dev,
                            "could not defragment mbuf\n");
                        m_freem(m);
                        return ENOBUFS;
                }
                m = m1;

                error = bus_dmamap_load_mbuf_sg(sc->txwi_dmat, data->map, m,
                    segs, &nsegs, 0);
                if (__predict_false(error != 0)) {
                        device_printf(sc->sc_dev, "can't map mbuf (error %d)\n",
                            error);
                        m_freem(m);
                        return error;
                }

                /* determine how many TXDs are now required */
                ntxds = 1 + (nsegs / 2);

                if (ring->queued + ntxds >= RT2860_TX_RING_COUNT) {
                        /* this is a hopeless case, drop the mbuf! */
                        bus_dmamap_unload(sc->txwi_dmat, data->map);
                        m_freem(m);
                        return ENOBUFS;
                }
        }

        qsel = (qid < WME_NUM_AC) ? RT2860_TX_QSEL_EDCA : RT2860_TX_QSEL_MGMT;

        /* first segment is TXWI + 802.11 header */
        txd = &ring->txd[ring->cur];
        txd->sdp0 = htole32(data->paddr);
        txd->sdl0 = htole16(sizeof (struct rt2860_txwi) + pad);
        txd->flags = qsel;

        /* setup payload segments */
        seg = &segs[0];
        for (i = nsegs; i >= 2; i -= 2) {
                txd->sdp1 = htole32(seg->ds_addr);
                txd->sdl1 = htole16(seg->ds_len);
                seg++;
                ring->cur = (ring->cur + 1) % RT2860_TX_RING_COUNT;
                /* grab a new Tx descriptor */
                txd = &ring->txd[ring->cur];
                txd->sdp0 = htole32(seg->ds_addr);
                txd->sdl0 = htole16(seg->ds_len);
                txd->flags = qsel;
                seg++;
        }
        /* finalize last segment */
        if (i > 0) {
                txd->sdp1 = htole32(seg->ds_addr);
                txd->sdl1 = htole16(seg->ds_len | RT2860_TX_LS1);
        } else {
                txd->sdl0 |= htole16(RT2860_TX_LS0);
                txd->sdl1 = 0;
        }

        /* remove from the free pool and link it into the SW Tx slot */
        SLIST_REMOVE_HEAD(&sc->data_pool, next);
        data->m = m;
        data->ni = ni;
        ring->data[ring->cur] = data;

        bus_dmamap_sync(sc->txwi_dmat, sc->txwi_map, BUS_DMASYNC_PREWRITE);
        bus_dmamap_sync(sc->txwi_dmat, data->map, BUS_DMASYNC_PREWRITE);
        bus_dmamap_sync(ring->desc_dmat, ring->desc_map, BUS_DMASYNC_PREWRITE);

        DPRINTFN(4, ("sending frame qid=%d wcid=%d nsegs=%d ridx=%d\n",
            qid, txwi->wcid, nsegs, ridx));

        ring->cur = (ring->cur + 1) % RT2860_TX_RING_COUNT;
        ring->queued += ntxds;
        if (ring->queued >= RT2860_TX_RING_COUNT)
                sc->qfullmsk |= 1 << qid;

        /* kick Tx */
        RAL_WRITE(sc, RT2860_TX_CTX_IDX(qid), ring->cur);

        return 0;
}

static int
rt2860_transmit(struct ieee80211com *ic, struct mbuf *m)   
{
        struct rt2860_softc *sc = ic->ic_softc;
        int error;

        RAL_LOCK(sc);
        if ((sc->sc_flags & RT2860_RUNNING) == 0) {
                RAL_UNLOCK(sc);
                return (ENXIO);
        }
        error = mbufq_enqueue(&sc->sc_snd, m);
        if (error) {
                RAL_UNLOCK(sc);
                return (error);
        }
        rt2860_start(sc);
        RAL_UNLOCK(sc);

        return (0);
}

static void
rt2860_start(struct rt2860_softc *sc)
{
        struct ieee80211_node *ni;
        struct mbuf *m;

        RAL_LOCK_ASSERT(sc);

        if ((sc->sc_flags & RT2860_RUNNING) == 0)
                return;

        while (!SLIST_EMPTY(&sc->data_pool) && sc->qfullmsk == 0 &&
            (m = mbufq_dequeue(&sc->sc_snd)) != NULL) {
                ni = (struct ieee80211_node *)m->m_pkthdr.rcvif;
                if (rt2860_tx(sc, m, ni) != 0) {
                        if_inc_counter(ni->ni_vap->iv_ifp,
                            IFCOUNTER_OERRORS, 1);
                        ieee80211_free_node(ni);
                        continue;
                }
                sc->sc_tx_timer = 5;
        }
}

static void
rt2860_watchdog(void *arg)
{
        struct rt2860_softc *sc = arg;

        RAL_LOCK_ASSERT(sc);

        KASSERT(sc->sc_flags & RT2860_RUNNING, ("not running"));

        if (sc->sc_invalid)             /* card ejected */
                return;

        if (sc->sc_tx_timer > 0 && --sc->sc_tx_timer == 0) {
                device_printf(sc->sc_dev, "device timeout\n");
                rt2860_stop_locked(sc);
                rt2860_init_locked(sc);
                counter_u64_add(sc->sc_ic.ic_oerrors, 1);
                return;
        }
        callout_reset(&sc->watchdog_ch, hz, rt2860_watchdog, sc);
}

static void
rt2860_parent(struct ieee80211com *ic)
{
        struct rt2860_softc *sc = ic->ic_softc;
        int startall = 0;

        RAL_LOCK(sc);
        if (ic->ic_nrunning> 0) {
                if (!(sc->sc_flags & RT2860_RUNNING)) {
                        rt2860_init_locked(sc);
                        startall = 1;
                } else
                        rt2860_update_promisc(ic);
        } else if (sc->sc_flags & RT2860_RUNNING)
                rt2860_stop_locked(sc);
        RAL_UNLOCK(sc);
        if (startall)
                ieee80211_start_all(ic);
}

/*
 * Reading and writing from/to the BBP is different from RT2560 and RT2661.
 * We access the BBP through the 8051 microcontroller unit which means that
 * the microcode must be loaded first.
 */
void
rt2860_mcu_bbp_write(struct rt2860_softc *sc, uint8_t reg, uint8_t val)
{
        int ntries;

        for (ntries = 0; ntries < 100; ntries++) {
                if (!(RAL_READ(sc, RT2860_H2M_BBPAGENT) & RT2860_BBP_CSR_KICK))
                        break;
                DELAY(1);
        }
        if (ntries == 100) {
                device_printf(sc->sc_dev,
                        "could not write to BBP through MCU\n");
                return;
        }

        RAL_WRITE(sc, RT2860_H2M_BBPAGENT, RT2860_BBP_RW_PARALLEL |
            RT2860_BBP_CSR_KICK | reg << 8 | val);
        RAL_BARRIER_WRITE(sc);

        rt2860_mcu_cmd(sc, RT2860_MCU_CMD_BBP, 0, 0);
        DELAY(1000);
}

uint8_t
rt2860_mcu_bbp_read(struct rt2860_softc *sc, uint8_t reg)
{
        uint32_t val;
        int ntries;

        for (ntries = 0; ntries < 100; ntries++) {
                if (!(RAL_READ(sc, RT2860_H2M_BBPAGENT) & RT2860_BBP_CSR_KICK))
                        break;
                DELAY(1);
        }
        if (ntries == 100) {
                device_printf(sc->sc_dev,
                    "could not read from BBP through MCU\n");
                return 0;
        }

        RAL_WRITE(sc, RT2860_H2M_BBPAGENT, RT2860_BBP_RW_PARALLEL |
            RT2860_BBP_CSR_KICK | RT2860_BBP_CSR_READ | reg << 8);
        RAL_BARRIER_WRITE(sc);

        rt2860_mcu_cmd(sc, RT2860_MCU_CMD_BBP, 0, 0);
        DELAY(1000);

        for (ntries = 0; ntries < 100; ntries++) {
                val = RAL_READ(sc, RT2860_H2M_BBPAGENT);
                if (!(val & RT2860_BBP_CSR_KICK))
                        return val & 0xff;
                DELAY(1);
        }
        device_printf(sc->sc_dev, "could not read from BBP through MCU\n");

        return 0;
}

/*
 * Write to one of the 4 programmable 24-bit RF registers.
 */
static void
rt2860_rf_write(struct rt2860_softc *sc, uint8_t reg, uint32_t val)
{
        uint32_t tmp;
        int ntries;

        for (ntries = 0; ntries < 100; ntries++) {
                if (!(RAL_READ(sc, RT2860_RF_CSR_CFG0) & RT2860_RF_REG_CTRL))
                        break;
                DELAY(1);
        }
        if (ntries == 100) {
                device_printf(sc->sc_dev, "could not write to RF\n");
                return;
        }

        /* RF registers are 24-bit on the RT2860 */
        tmp = RT2860_RF_REG_CTRL | 24 << RT2860_RF_REG_WIDTH_SHIFT |
            (val & 0x3fffff) << 2 | (reg & 3);
        RAL_WRITE(sc, RT2860_RF_CSR_CFG0, tmp);
}

static uint8_t
rt3090_rf_read(struct rt2860_softc *sc, uint8_t reg)
{
        uint32_t tmp;
        int ntries;

        for (ntries = 0; ntries < 100; ntries++) {
                if (!(RAL_READ(sc, RT3070_RF_CSR_CFG) & RT3070_RF_KICK))
                        break;
                DELAY(1);
        }
        if (ntries == 100) {
                device_printf(sc->sc_dev, "could not read RF register\n");
                return 0xff;
        }
        tmp = RT3070_RF_KICK | reg << 8;
        RAL_WRITE(sc, RT3070_RF_CSR_CFG, tmp);

        for (ntries = 0; ntries < 100; ntries++) {
                tmp = RAL_READ(sc, RT3070_RF_CSR_CFG);
                if (!(tmp & RT3070_RF_KICK))
                        break;
                DELAY(1);
        }
        if (ntries == 100) {
                device_printf(sc->sc_dev, "could not read RF register\n");
                return 0xff;
        }
        return tmp & 0xff;
}

void
rt3090_rf_write(struct rt2860_softc *sc, uint8_t reg, uint8_t val)
{
        uint32_t tmp;
        int ntries;

        for (ntries = 0; ntries < 10; ntries++) {
                if (!(RAL_READ(sc, RT3070_RF_CSR_CFG) & RT3070_RF_KICK))
                        break;
                DELAY(10);
        }
        if (ntries == 10) {
                device_printf(sc->sc_dev, "could not write to RF\n");
                return;
        }

        tmp = RT3070_RF_WRITE | RT3070_RF_KICK | reg << 8 | val;
        RAL_WRITE(sc, RT3070_RF_CSR_CFG, tmp);
}

/*
 * Send a command to the 8051 microcontroller unit.
 */
int
rt2860_mcu_cmd(struct rt2860_softc *sc, uint8_t cmd, uint16_t arg, int wait)
{
        int slot, ntries;
        uint32_t tmp;
        uint8_t cid;

        for (ntries = 0; ntries < 100; ntries++) {
                if (!(RAL_READ(sc, RT2860_H2M_MAILBOX) & RT2860_H2M_BUSY))
                        break;
                DELAY(2);
        }
        if (ntries == 100)
                return EIO;

        cid = wait ? cmd : RT2860_TOKEN_NO_INTR;
        RAL_WRITE(sc, RT2860_H2M_MAILBOX, RT2860_H2M_BUSY | cid << 16 | arg);
        RAL_BARRIER_WRITE(sc);
        RAL_WRITE(sc, RT2860_HOST_CMD, cmd);

        if (!wait)
                return 0;
        /* wait for the command to complete */
        for (ntries = 0; ntries < 200; ntries++) {
                tmp = RAL_READ(sc, RT2860_H2M_MAILBOX_CID);
                /* find the command slot */
                for (slot = 0; slot < 4; slot++, tmp >>= 8)
                        if ((tmp & 0xff) == cid)
                                break;
                if (slot < 4)
                        break;
                DELAY(100);
        }
        if (ntries == 200) {
                /* clear command and status */
                RAL_WRITE(sc, RT2860_H2M_MAILBOX_STATUS, 0xffffffff);
                RAL_WRITE(sc, RT2860_H2M_MAILBOX_CID, 0xffffffff);
                return ETIMEDOUT;
        }
        /* get command status (1 means success) */
        tmp = RAL_READ(sc, RT2860_H2M_MAILBOX_STATUS);
        tmp = (tmp >> (slot * 8)) & 0xff;
        DPRINTF(("MCU command=0x%02x slot=%d status=0x%02x\n",
            cmd, slot, tmp));
        /* clear command and status */
        RAL_WRITE(sc, RT2860_H2M_MAILBOX_STATUS, 0xffffffff);
        RAL_WRITE(sc, RT2860_H2M_MAILBOX_CID, 0xffffffff);
        return (tmp == 1) ? 0 : EIO;
}

static void
rt2860_enable_mrr(struct rt2860_softc *sc)
{
#define CCK(mcs)        (mcs)
#define OFDM(mcs)       (1U << 3 | (mcs))
        RAL_WRITE(sc, RT2860_LG_FBK_CFG0,
            OFDM(6) << 28 |     /* 54->48 */
            OFDM(5) << 24 |     /* 48->36 */
            OFDM(4) << 20 |     /* 36->24 */
            OFDM(3) << 16 |     /* 24->18 */
            OFDM(2) << 12 |     /* 18->12 */
            OFDM(1) <<  8 |     /* 12-> 9 */
            OFDM(0) <<  4 |     /*  9-> 6 */
            OFDM(0));           /*  6-> 6 */

        RAL_WRITE(sc, RT2860_LG_FBK_CFG1,
            CCK(2) << 12 |      /* 11->5.5 */
            CCK(1) <<  8 |      /* 5.5-> 2 */
            CCK(0) <<  4 |      /*   2-> 1 */
            CCK(0));            /*   1-> 1 */
#undef OFDM
#undef CCK
}

static void
rt2860_set_txpreamble(struct rt2860_softc *sc)
{
        struct ieee80211com *ic = &sc->sc_ic;
        uint32_t tmp;

        tmp = RAL_READ(sc, RT2860_AUTO_RSP_CFG);
        tmp &= ~RT2860_CCK_SHORT_EN;
        if (ic->ic_flags & IEEE80211_F_SHPREAMBLE)
                tmp |= RT2860_CCK_SHORT_EN;
        RAL_WRITE(sc, RT2860_AUTO_RSP_CFG, tmp);
}

void
rt2860_set_basicrates(struct rt2860_softc *sc,
    const struct ieee80211_rateset *rs)
{
        struct ieee80211com *ic = &sc->sc_ic;
        uint32_t mask = 0;
        uint8_t rate;
        int i;

        for (i = 0; i < rs->rs_nrates; i++) {
                rate = rs->rs_rates[i];

                if (!(rate & IEEE80211_RATE_BASIC))
                        continue;

                mask |= 1 << ieee80211_legacy_rate_lookup(ic->ic_rt,
                    IEEE80211_RV(rate));
        }

        RAL_WRITE(sc, RT2860_LEGACY_BASIC_RATE, mask);
}

static void
rt2860_scan_start(struct ieee80211com *ic)
{
        struct rt2860_softc *sc = ic->ic_softc;
        uint32_t tmp;

        tmp = RAL_READ(sc, RT2860_BCN_TIME_CFG);
        RAL_WRITE(sc, RT2860_BCN_TIME_CFG,
            tmp & ~(RT2860_BCN_TX_EN | RT2860_TSF_TIMER_EN |
            RT2860_TBTT_TIMER_EN));
        rt2860_set_gp_timer(sc, 0);
}

static void
rt2860_scan_end(struct ieee80211com *ic)
{
        struct rt2860_softc *sc = ic->ic_softc;
        struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps);

        if (vap->iv_state == IEEE80211_S_RUN) {
                rt2860_enable_tsf_sync(sc);
                rt2860_set_gp_timer(sc, 500);
        }
}

static void
rt2860_getradiocaps(struct ieee80211com *ic, int maxchans, int *nchans,
    struct ieee80211_channel chans[])
{
        struct rt2860_softc *sc = ic->ic_softc;
        uint8_t bands[IEEE80211_MODE_BYTES];

        memset(bands, 0, sizeof(bands));
        setbit(bands, IEEE80211_MODE_11B);
        setbit(bands, IEEE80211_MODE_11G);
        ieee80211_add_channels_default_2ghz(chans, maxchans, nchans, bands, 0);

        if (sc->rf_rev == RT2860_RF_2750 || sc->rf_rev == RT2860_RF_2850) {
                setbit(bands, IEEE80211_MODE_11A);
                ieee80211_add_channel_list_5ghz(chans, maxchans, nchans,
                    rt2860_chan_5ghz, nitems(rt2860_chan_5ghz), bands, 0);
        }
}

static void
rt2860_set_channel(struct ieee80211com *ic)
{
        struct rt2860_softc *sc = ic->ic_softc;

        RAL_LOCK(sc);
        rt2860_switch_chan(sc, ic->ic_curchan);
        RAL_UNLOCK(sc);
}

static void
rt2860_select_chan_group(struct rt2860_softc *sc, int group)
{
        uint32_t tmp;
        uint8_t agc;

        rt2860_mcu_bbp_write(sc, 62, 0x37 - sc->lna[group]);
        rt2860_mcu_bbp_write(sc, 63, 0x37 - sc->lna[group]);
        rt2860_mcu_bbp_write(sc, 64, 0x37 - sc->lna[group]);
        rt2860_mcu_bbp_write(sc, 86, 0x00);

        if (group == 0) {
                if (sc->ext_2ghz_lna) {
                        rt2860_mcu_bbp_write(sc, 82, 0x62);
                        rt2860_mcu_bbp_write(sc, 75, 0x46);
                } else {
                        rt2860_mcu_bbp_write(sc, 82, 0x84);
                        rt2860_mcu_bbp_write(sc, 75, 0x50);
                }
        } else {
                if (sc->ext_5ghz_lna) {
                        rt2860_mcu_bbp_write(sc, 82, 0xf2);
                        rt2860_mcu_bbp_write(sc, 75, 0x46);
                } else {
                        rt2860_mcu_bbp_write(sc, 82, 0xf2);
                        rt2860_mcu_bbp_write(sc, 75, 0x50);
                }
        }

        tmp = RAL_READ(sc, RT2860_TX_BAND_CFG);
        tmp &= ~(RT2860_5G_BAND_SEL_N | RT2860_5G_BAND_SEL_P);
        tmp |= (group == 0) ? RT2860_5G_BAND_SEL_N : RT2860_5G_BAND_SEL_P;
        RAL_WRITE(sc, RT2860_TX_BAND_CFG, tmp);

        /* enable appropriate Power Amplifiers and Low Noise Amplifiers */
        tmp = RT2860_RFTR_EN | RT2860_TRSW_EN | RT2860_LNA_PE0_EN;
        if (sc->nrxchains > 1)
                tmp |= RT2860_LNA_PE1_EN;
        if (sc->mac_ver == 0x3593 && sc->nrxchains > 2)
                tmp |= RT3593_LNA_PE2_EN;
        if (group == 0) {       /* 2GHz */
                tmp |= RT2860_PA_PE_G0_EN;
                if (sc->ntxchains > 1)
                        tmp |= RT2860_PA_PE_G1_EN;
                if (sc->mac_ver == 0x3593 && sc->ntxchains > 2)
                        tmp |= RT3593_PA_PE_G2_EN;
        } else {                /* 5GHz */
                tmp |= RT2860_PA_PE_A0_EN;
                if (sc->ntxchains > 1)
                        tmp |= RT2860_PA_PE_A1_EN;
                if (sc->mac_ver == 0x3593 && sc->ntxchains > 2)
                        tmp |= RT3593_PA_PE_A2_EN;
        }
        RAL_WRITE(sc, RT2860_TX_PIN_CFG, tmp);

        if (sc->mac_ver == 0x3593) {
                tmp = RAL_READ(sc, RT2860_GPIO_CTRL);
                if (sc->sc_flags & RT2860_PCIE) {
                        tmp &= ~0x01010000;
                        if (group == 0)
                                tmp |= 0x00010000;
                } else {
                        tmp &= ~0x00008080;
                        if (group == 0)
                                tmp |= 0x00000080;
                }
                tmp = (tmp & ~0x00001000) | 0x00000010;
                RAL_WRITE(sc, RT2860_GPIO_CTRL, tmp);
        }

        /* set initial AGC value */
        if (group == 0) {       /* 2GHz band */
                if (sc->mac_ver >= 0x3071)
                        agc = 0x1c + sc->lna[0] * 2;
                else
                        agc = 0x2e + sc->lna[0];
        } else {                /* 5GHz band */
                agc = 0x32 + (sc->lna[group] * 5) / 3;
        }
        rt2860_mcu_bbp_write(sc, 66, agc);

        DELAY(1000);
}

static void
rt2860_set_chan(struct rt2860_softc *sc, u_int chan)
{
        const struct rfprog *rfprog = rt2860_rf2850;
        uint32_t r2, r3, r4;
        int8_t txpow1, txpow2;
        u_int i;

        /* find the settings for this channel (we know it exists) */
        for (i = 0; rfprog[i].chan != chan; i++);

        r2 = rfprog[i].r2;
        if (sc->ntxchains == 1)
                r2 |= 1 << 12;          /* 1T: disable Tx chain 2 */
        if (sc->nrxchains == 1)
                r2 |= 1 << 15 | 1 << 4; /* 1R: disable Rx chains 2 & 3 */
        else if (sc->nrxchains == 2)
                r2 |= 1 << 4;           /* 2R: disable Rx chain 3 */

        /* use Tx power values from EEPROM */
        txpow1 = sc->txpow1[i];
        txpow2 = sc->txpow2[i];
        if (chan > 14) {
                if (txpow1 >= 0)
                        txpow1 = txpow1 << 1 | 1;
                else
                        txpow1 = (7 + txpow1) << 1;
                if (txpow2 >= 0)
                        txpow2 = txpow2 << 1 | 1;
                else
                        txpow2 = (7 + txpow2) << 1;
        }
        r3 = rfprog[i].r3 | txpow1 << 7;
        r4 = rfprog[i].r4 | sc->freq << 13 | txpow2 << 4;

        rt2860_rf_write(sc, RT2860_RF1, rfprog[i].r1);
        rt2860_rf_write(sc, RT2860_RF2, r2);
        rt2860_rf_write(sc, RT2860_RF3, r3);
        rt2860_rf_write(sc, RT2860_RF4, r4);

        DELAY(200);

        rt2860_rf_write(sc, RT2860_RF1, rfprog[i].r1);
        rt2860_rf_write(sc, RT2860_RF2, r2);
        rt2860_rf_write(sc, RT2860_RF3, r3 | 1);
        rt2860_rf_write(sc, RT2860_RF4, r4);

        DELAY(200);

        rt2860_rf_write(sc, RT2860_RF1, rfprog[i].r1);
        rt2860_rf_write(sc, RT2860_RF2, r2);
        rt2860_rf_write(sc, RT2860_RF3, r3);
        rt2860_rf_write(sc, RT2860_RF4, r4);
}

static void
rt3090_set_chan(struct rt2860_softc *sc, u_int chan)
{
        int8_t txpow1, txpow2;
        uint8_t rf;
        int i;

        /* RT3090 is 2GHz only */
        KASSERT(chan >= 1 && chan <= 14, ("chan %d not support", chan));

        /* find the settings for this channel (we know it exists) */
        for (i = 0; rt2860_rf2850[i].chan != chan; i++);

        /* use Tx power values from EEPROM */
        txpow1 = sc->txpow1[i];
        txpow2 = sc->txpow2[i];

        rt3090_rf_write(sc, 2, rt3090_freqs[i].n);
        rf = rt3090_rf_read(sc, 3);
        rf = (rf & ~0x0f) | rt3090_freqs[i].k;
        rt3090_rf_write(sc, 3, rf);
        rf = rt3090_rf_read(sc, 6);
        rf = (rf & ~0x03) | rt3090_freqs[i].r;
        rt3090_rf_write(sc, 6, rf);

        /* set Tx0 power */
        rf = rt3090_rf_read(sc, 12);
        rf = (rf & ~0x1f) | txpow1;
        rt3090_rf_write(sc, 12, rf);

        /* set Tx1 power */
        rf = rt3090_rf_read(sc, 13);
        rf = (rf & ~0x1f) | txpow2;
        rt3090_rf_write(sc, 13, rf);

        rf = rt3090_rf_read(sc, 1);
        rf &= ~0xfc;
        if (sc->ntxchains == 1)
                rf |= RT3070_TX1_PD | RT3070_TX2_PD;
        else if (sc->ntxchains == 2)
                rf |= RT3070_TX2_PD;
        if (sc->nrxchains == 1)
                rf |= RT3070_RX1_PD | RT3070_RX2_PD;
        else if (sc->nrxchains == 2)
                rf |= RT3070_RX2_PD;
        rt3090_rf_write(sc, 1, rf);

        /* set RF offset */
        rf = rt3090_rf_read(sc, 23);
        rf = (rf & ~0x7f) | sc->freq;
        rt3090_rf_write(sc, 23, rf);

        /* program RF filter */
        rf = rt3090_rf_read(sc, 24);    /* Tx */
        rf = (rf & ~0x3f) | sc->rf24_20mhz;
        rt3090_rf_write(sc, 24, rf);
        rf = rt3090_rf_read(sc, 31);    /* Rx */
        rf = (rf & ~0x3f) | sc->rf24_20mhz;
        rt3090_rf_write(sc, 31, rf);

        /* enable RF tuning */
        rf = rt3090_rf_read(sc, 7);
        rt3090_rf_write(sc, 7, rf | RT3070_TUNE);
}

static void
rt5390_set_chan(struct rt2860_softc *sc, u_int chan)
{
        uint8_t h20mhz, rf, tmp;
        int8_t txpow1, txpow2;
        int i;

        /* RT5390 is 2GHz only */
        KASSERT(chan >= 1 && chan <= 14, ("chan %d not support", chan));

        /* find the settings for this channel (we know it exists) */
        for (i = 0; rt2860_rf2850[i].chan != chan; i++);

        /* use Tx power values from EEPROM */
        txpow1 = sc->txpow1[i];
        txpow2 = sc->txpow2[i];

        rt3090_rf_write(sc, 8, rt3090_freqs[i].n);
        rt3090_rf_write(sc, 9, rt3090_freqs[i].k & 0x0f);
        rf = rt3090_rf_read(sc, 11);
        rf = (rf & ~0x03) | (rt3090_freqs[i].r & 0x03);
        rt3090_rf_write(sc, 11, rf);

        rf = rt3090_rf_read(sc, 49);
        rf = (rf & ~0x3f) | (txpow1 & 0x3f);
        /* the valid range of the RF R49 is 0x00~0x27 */
        if ((rf & 0x3f) > 0x27)
                rf = (rf & ~0x3f) | 0x27;
        rt3090_rf_write(sc, 49, rf);
        if (sc->mac_ver == 0x5392) {
                rf = rt3090_rf_read(sc, 50);
                rf = (rf & ~0x3f) | (txpow2 & 0x3f);
                /* the valid range of the RF R50 is 0x00~0x27 */
                if ((rf & 0x3f) > 0x27)
                        rf = (rf & ~0x3f) | 0x27;
                rt3090_rf_write(sc, 50, rf);
        }

        rf = rt3090_rf_read(sc, 1);
        rf |= RT3070_RF_BLOCK | RT3070_PLL_PD | RT3070_RX0_PD | RT3070_TX0_PD;
        if (sc->mac_ver == 0x5392)
                rf |= RT3070_RX1_PD | RT3070_TX1_PD;
        rt3090_rf_write(sc, 1, rf);

        rf = rt3090_rf_read(sc, 2);
        rt3090_rf_write(sc, 2, rf | RT3593_RESCAL);
        DELAY(1000);
        rt3090_rf_write(sc, 2, rf & ~RT3593_RESCAL);

        rf = rt3090_rf_read(sc, 17);
        tmp = rf;
        rf = (rf & ~0x7f) | (sc->freq & 0x7f);
        rf = MIN(rf, 0x5f);
        if (tmp != rf)
                rt2860_mcu_cmd(sc, 0x74, (tmp << 8 ) | rf, 0);

        if (sc->mac_ver == 0x5390) {
                if (chan <= 4)
                        rf = 0x73;
                else if (chan >= 5 && chan <= 6)
                        rf = 0x63;
                else if (chan >= 7 && chan <= 10)
                        rf = 0x53;
                else
                        rf = 43;
                rt3090_rf_write(sc, 55, rf);

                if (chan == 1)
                        rf = 0x0c;
                else if (chan == 2)
                        rf = 0x0b;
                else if (chan == 3)
                        rf = 0x0a;
                else if (chan >= 4 && chan <= 6)
                        rf = 0x09;
                else if (chan >= 7 && chan <= 12)
                        rf = 0x08;
                else if (chan == 13)
                        rf = 0x07;
                else
                        rf = 0x06;
                rt3090_rf_write(sc, 59, rf);
        }

        /* Tx/Rx h20M */
        h20mhz = (sc->rf24_20mhz & 0x20) >> 5;
        rf = rt3090_rf_read(sc, 30);
        rf = (rf & ~0x06) | (h20mhz << 1) | (h20mhz << 2);
        rt3090_rf_write(sc, 30, rf);

        /* Rx BB filter VCM */
        rf = rt3090_rf_read(sc, 30);
        rf = (rf & ~0x18) | 0x10;
        rt3090_rf_write(sc, 30, rf);

        /* Initiate VCO calibration. */
        rf = rt3090_rf_read(sc, 3);
        rf |= RT3593_VCOCAL;
        rt3090_rf_write(sc, 3, rf);
}

static int
rt3090_rf_init(struct rt2860_softc *sc)
{
        uint32_t tmp;
        uint8_t rf, bbp;
        int i;

        rf = rt3090_rf_read(sc, 30);
        /* toggle RF R30 bit 7 */
        rt3090_rf_write(sc, 30, rf | 0x80);
        DELAY(1000);
        rt3090_rf_write(sc, 30, rf & ~0x80);

        tmp = RAL_READ(sc, RT3070_LDO_CFG0);
        tmp &= ~0x1f000000;
        if (sc->patch_dac && sc->mac_rev < 0x0211)
                tmp |= 0x0d000000;      /* 1.35V */
        else
                tmp |= 0x01000000;      /* 1.2V */
        RAL_WRITE(sc, RT3070_LDO_CFG0, tmp);

        /* patch LNA_PE_G1 */
        tmp = RAL_READ(sc, RT3070_GPIO_SWITCH);
        RAL_WRITE(sc, RT3070_GPIO_SWITCH, tmp & ~0x20);

        /* initialize RF registers to default value */
        for (i = 0; i < nitems(rt3090_def_rf); i++) {
                rt3090_rf_write(sc, rt3090_def_rf[i].reg,
                    rt3090_def_rf[i].val);
        }

        /* select 20MHz bandwidth */
        rt3090_rf_write(sc, 31, 0x14);

        rf = rt3090_rf_read(sc, 6);
        rt3090_rf_write(sc, 6, rf | 0x40);

        if (sc->mac_ver != 0x3593) {
                /* calibrate filter for 20MHz bandwidth */
                sc->rf24_20mhz = 0x1f;  /* default value */
                rt3090_filter_calib(sc, 0x07, 0x16, &sc->rf24_20mhz);

                /* select 40MHz bandwidth */
                bbp = rt2860_mcu_bbp_read(sc, 4);
                rt2860_mcu_bbp_write(sc, 4, (bbp & ~0x08) | 0x10);
                rf = rt3090_rf_read(sc, 31);
                rt3090_rf_write(sc, 31, rf | 0x20);

                /* calibrate filter for 40MHz bandwidth */
                sc->rf24_40mhz = 0x2f;  /* default value */
                rt3090_filter_calib(sc, 0x27, 0x19, &sc->rf24_40mhz);

                /* go back to 20MHz bandwidth */
                bbp = rt2860_mcu_bbp_read(sc, 4);
                rt2860_mcu_bbp_write(sc, 4, bbp & ~0x18);
        }
        if (sc->mac_rev < 0x0211)
                rt3090_rf_write(sc, 27, 0x03);

        tmp = RAL_READ(sc, RT3070_OPT_14);
        RAL_WRITE(sc, RT3070_OPT_14, tmp | 1);

        if (sc->rf_rev == RT3070_RF_3020)
                rt3090_set_rx_antenna(sc, 0);

        bbp = rt2860_mcu_bbp_read(sc, 138);
        if (sc->mac_ver == 0x3593) {
                if (sc->ntxchains == 1)
                        bbp |= 0x60;    /* turn off DAC1 and DAC2 */
                else if (sc->ntxchains == 2)
                        bbp |= 0x40;    /* turn off DAC2 */
                if (sc->nrxchains == 1)
                        bbp &= ~0x06;   /* turn off ADC1 and ADC2 */
                else if (sc->nrxchains == 2)
                        bbp &= ~0x04;   /* turn off ADC2 */
        } else {
                if (sc->ntxchains == 1)
                        bbp |= 0x20;    /* turn off DAC1 */
                if (sc->nrxchains == 1)
                        bbp &= ~0x02;   /* turn off ADC1 */
        }
        rt2860_mcu_bbp_write(sc, 138, bbp);

        rf = rt3090_rf_read(sc, 1);
        rf &= ~(RT3070_RX0_PD | RT3070_TX0_PD);
        rf |= RT3070_RF_BLOCK | RT3070_RX1_PD | RT3070_TX1_PD;
        rt3090_rf_write(sc, 1, rf);

        rf = rt3090_rf_read(sc, 15);
        rt3090_rf_write(sc, 15, rf & ~RT3070_TX_LO2);

        rf = rt3090_rf_read(sc, 17);
        rf &= ~RT3070_TX_LO1;
        if (sc->mac_rev >= 0x0211 && !sc->ext_2ghz_lna)
                rf |= 0x20;     /* fix for long range Rx issue */
        if (sc->txmixgain_2ghz >= 2)
                rf = (rf & ~0x7) | sc->txmixgain_2ghz;
        rt3090_rf_write(sc, 17, rf);

        rf = rt3090_rf_read(sc, 20);
        rt3090_rf_write(sc, 20, rf & ~RT3070_RX_LO1);

        rf = rt3090_rf_read(sc, 21);
        rt3090_rf_write(sc, 21, rf & ~RT3070_RX_LO2);

        return (0);
}

static void
rt5390_rf_init(struct rt2860_softc *sc)
{
        uint8_t rf, bbp;
        int i;

        rf = rt3090_rf_read(sc, 2);
        /* Toggle RF R2 bit 7. */
        rt3090_rf_write(sc, 2, rf | RT3593_RESCAL);
        DELAY(1000);
        rt3090_rf_write(sc, 2, rf & ~RT3593_RESCAL);

        /* Initialize RF registers to default value. */
        if (sc->mac_ver == 0x5392) {
                for (i = 0; i < nitems(rt5392_def_rf); i++) {
                        rt3090_rf_write(sc, rt5392_def_rf[i].reg,
                            rt5392_def_rf[i].val);
                }
        } else {
                for (i = 0; i < nitems(rt5390_def_rf); i++) {
                        rt3090_rf_write(sc, rt5390_def_rf[i].reg,
                            rt5390_def_rf[i].val);
                }
        }

        sc->rf24_20mhz = 0x1f;
        sc->rf24_40mhz = 0x2f;

        if (sc->mac_rev < 0x0211)
                rt3090_rf_write(sc, 27, 0x03);

        /* Set led open drain enable. */
        RAL_WRITE(sc, RT3070_OPT_14, RAL_READ(sc, RT3070_OPT_14) | 1);

        RAL_WRITE(sc, RT2860_TX_SW_CFG1, 0);
        RAL_WRITE(sc, RT2860_TX_SW_CFG2, 0);

        if (sc->mac_ver == 0x5390)
                rt3090_set_rx_antenna(sc, 0);

        /* Patch RSSI inaccurate issue. */
        rt2860_mcu_bbp_write(sc, 79, 0x13);
        rt2860_mcu_bbp_write(sc, 80, 0x05);
        rt2860_mcu_bbp_write(sc, 81, 0x33);

        /* Enable DC filter. */
        if (sc->mac_rev >= 0x0211)
                rt2860_mcu_bbp_write(sc, 103, 0xc0);

        bbp = rt2860_mcu_bbp_read(sc, 138);
        if (sc->ntxchains == 1)
                bbp |= 0x20;    /* Turn off DAC1. */
        if (sc->nrxchains == 1)
                bbp &= ~0x02;   /* Turn off ADC1. */
        rt2860_mcu_bbp_write(sc, 138, bbp);

        /* Enable RX LO1 and LO2. */
        rt3090_rf_write(sc, 38, rt3090_rf_read(sc, 38) & ~RT5390_RX_LO1);
        rt3090_rf_write(sc, 39, rt3090_rf_read(sc, 39) & ~RT5390_RX_LO2);

        /* Avoid data lost and CRC error. */
        rt2860_mcu_bbp_write(sc, 4,
            rt2860_mcu_bbp_read(sc, 4) | RT5390_MAC_IF_CTRL);

        rf = rt3090_rf_read(sc, 30);
        rf = (rf & ~0x18) | 0x10;
        rt3090_rf_write(sc, 30, rf);
}

static void
rt3090_rf_wakeup(struct rt2860_softc *sc)
{
        uint32_t tmp;
        uint8_t rf;

        if (sc->mac_ver == 0x3593) {
                /* enable VCO */
                rf = rt3090_rf_read(sc, 1);
                rt3090_rf_write(sc, 1, rf | RT3593_VCO);

                /* initiate VCO calibration */
                rf = rt3090_rf_read(sc, 3);
                rt3090_rf_write(sc, 3, rf | RT3593_VCOCAL);

                /* enable VCO bias current control */
                rf = rt3090_rf_read(sc, 6);
                rt3090_rf_write(sc, 6, rf | RT3593_VCO_IC);

                /* initiate res calibration */
                rf = rt3090_rf_read(sc, 2);
                rt3090_rf_write(sc, 2, rf | RT3593_RESCAL);

                /* set reference current control to 0.33 mA */
                rf = rt3090_rf_read(sc, 22);
                rf &= ~RT3593_CP_IC_MASK;
                rf |= 1 << RT3593_CP_IC_SHIFT;
                rt3090_rf_write(sc, 22, rf);

                /* enable RX CTB */
                rf = rt3090_rf_read(sc, 46);
                rt3090_rf_write(sc, 46, rf | RT3593_RX_CTB);

                rf = rt3090_rf_read(sc, 20);
                rf &= ~(RT3593_LDO_RF_VC_MASK | RT3593_LDO_PLL_VC_MASK);
                rt3090_rf_write(sc, 20, rf);
        } else {
                /* enable RF block */
                rf = rt3090_rf_read(sc, 1);
                rt3090_rf_write(sc, 1, rf | RT3070_RF_BLOCK);

                /* enable VCO bias current control */
                rf = rt3090_rf_read(sc, 7);
                rt3090_rf_write(sc, 7, rf | 0x30);

                rf = rt3090_rf_read(sc, 9);
                rt3090_rf_write(sc, 9, rf | 0x0e);

                /* enable RX CTB */
                rf = rt3090_rf_read(sc, 21);
                rt3090_rf_write(sc, 21, rf | RT3070_RX_CTB);

                /* fix Tx to Rx IQ glitch by raising RF voltage */
                rf = rt3090_rf_read(sc, 27);
                rf &= ~0x77;
                if (sc->mac_rev < 0x0211)
                        rf |= 0x03;
                rt3090_rf_write(sc, 27, rf);
        }
        if (sc->patch_dac && sc->mac_rev < 0x0211) {
                tmp = RAL_READ(sc, RT3070_LDO_CFG0);
                tmp = (tmp & ~0x1f000000) | 0x0d000000;
                RAL_WRITE(sc, RT3070_LDO_CFG0, tmp);
        }
}

static void
rt5390_rf_wakeup(struct rt2860_softc *sc)
{
        uint32_t tmp;
        uint8_t rf;

        rf = rt3090_rf_read(sc, 1);
        rf |= RT3070_RF_BLOCK | RT3070_PLL_PD | RT3070_RX0_PD | 
            RT3070_TX0_PD;
        if (sc->mac_ver == 0x5392)
                rf |= RT3070_RX1_PD | RT3070_TX1_PD;
        rt3090_rf_write(sc, 1, rf);

        rf = rt3090_rf_read(sc, 6);
        rf |= RT3593_VCO_IC | RT3593_VCOCAL;
        if (sc->mac_ver == 0x5390)
                rf &= ~RT3593_VCO_IC;
        rt3090_rf_write(sc, 6, rf);

        rt3090_rf_write(sc, 2, rt3090_rf_read(sc, 2) | RT3593_RESCAL);

        rf = rt3090_rf_read(sc, 22);
        rf = (rf & ~0xe0) | 0x20;
        rt3090_rf_write(sc, 22, rf);

        rt3090_rf_write(sc, 42, rt3090_rf_read(sc, 42) | RT5390_RX_CTB);
        rt3090_rf_write(sc, 20, rt3090_rf_read(sc, 20) & ~0x77);
        rt3090_rf_write(sc, 3, rt3090_rf_read(sc, 3) | RT3593_VCOCAL);

        if (sc->patch_dac && sc->mac_rev < 0x0211) {
                tmp = RAL_READ(sc, RT3070_LDO_CFG0);
                tmp = (tmp & ~0x1f000000) | 0x0d000000;
                RAL_WRITE(sc, RT3070_LDO_CFG0, tmp);
        }
}

static int
rt3090_filter_calib(struct rt2860_softc *sc, uint8_t init, uint8_t target,
    uint8_t *val)
{
        uint8_t rf22, rf24;
        uint8_t bbp55_pb, bbp55_sb, delta;
        int ntries;

        /* program filter */
        rf24 = rt3090_rf_read(sc, 24);
        rf24 = (rf24 & 0xc0) | init;    /* initial filter value */
        rt3090_rf_write(sc, 24, rf24);

        /* enable baseband loopback mode */
        rf22 = rt3090_rf_read(sc, 22);
        rt3090_rf_write(sc, 22, rf22 | RT3070_BB_LOOPBACK);

        /* set power and frequency of passband test tone */
        rt2860_mcu_bbp_write(sc, 24, 0x00);
        for (ntries = 0; ntries < 100; ntries++) {
                /* transmit test tone */
                rt2860_mcu_bbp_write(sc, 25, 0x90);
                DELAY(1000);
                /* read received power */
                bbp55_pb = rt2860_mcu_bbp_read(sc, 55);
                if (bbp55_pb != 0)
                        break;
        }
        if (ntries == 100)
                return (ETIMEDOUT);

        /* set power and frequency of stopband test tone */
        rt2860_mcu_bbp_write(sc, 24, 0x06);
        for (ntries = 0; ntries < 100; ntries++) {
                /* transmit test tone */
                rt2860_mcu_bbp_write(sc, 25, 0x90);
                DELAY(1000);
                /* read received power */
                bbp55_sb = rt2860_mcu_bbp_read(sc, 55);

                delta = bbp55_pb - bbp55_sb;
                if (delta > target)
                        break;

                /* reprogram filter */
                rf24++;
                rt3090_rf_write(sc, 24, rf24);
        }
        if (ntries < 100) {
                if (rf24 != init)
                        rf24--; /* backtrack */
                *val = rf24;
                rt3090_rf_write(sc, 24, rf24);
        }

        /* restore initial state */
        rt2860_mcu_bbp_write(sc, 24, 0x00);

        /* disable baseband loopback mode */
        rf22 = rt3090_rf_read(sc, 22);
        rt3090_rf_write(sc, 22, rf22 & ~RT3070_BB_LOOPBACK);

        return (0);
}

static void
rt3090_rf_setup(struct rt2860_softc *sc)
{
        uint8_t bbp;
        int i;

        if (sc->mac_rev >= 0x0211) {
                /* enable DC filter */
                rt2860_mcu_bbp_write(sc, 103, 0xc0);

                /* improve power consumption */
                bbp = rt2860_mcu_bbp_read(sc, 31);
                rt2860_mcu_bbp_write(sc, 31, bbp & ~0x03);
        }

        RAL_WRITE(sc, RT2860_TX_SW_CFG1, 0);
        if (sc->mac_rev < 0x0211) {
                RAL_WRITE(sc, RT2860_TX_SW_CFG2,
                    sc->patch_dac ? 0x2c : 0x0f);
        } else
                RAL_WRITE(sc, RT2860_TX_SW_CFG2, 0);

        /* initialize RF registers from ROM */
        if (sc->mac_ver < 0x5390) {
                for (i = 0; i < 10; i++) {
                        if (sc->rf[i].reg == 0 || sc->rf[i].reg == 0xff)
                                continue;
                        rt3090_rf_write(sc, sc->rf[i].reg, sc->rf[i].val);
                }
        }
}

static void
rt2860_set_leds(struct rt2860_softc *sc, uint16_t which)
{
        rt2860_mcu_cmd(sc, RT2860_MCU_CMD_LEDS,
            which | (sc->leds & 0x7f), 0);
}

/*
 * Hardware has a general-purpose programmable timer interrupt that can
 * periodically raise MAC_INT_4.
 */
static void
rt2860_set_gp_timer(struct rt2860_softc *sc, int ms)
{
        uint32_t tmp;

        /* disable GP timer before reprogramming it */
        tmp = RAL_READ(sc, RT2860_INT_TIMER_EN);
        RAL_WRITE(sc, RT2860_INT_TIMER_EN, tmp & ~RT2860_GP_TIMER_EN);

        if (ms == 0)
                return;

        tmp = RAL_READ(sc, RT2860_INT_TIMER_CFG);
        ms *= 16;       /* Unit: 64us */
        tmp = (tmp & 0xffff) | ms << RT2860_GP_TIMER_SHIFT;
        RAL_WRITE(sc, RT2860_INT_TIMER_CFG, tmp);

        /* enable GP timer */
        tmp = RAL_READ(sc, RT2860_INT_TIMER_EN);
        RAL_WRITE(sc, RT2860_INT_TIMER_EN, tmp | RT2860_GP_TIMER_EN);
}

static void
rt2860_set_bssid(struct rt2860_softc *sc, const uint8_t *bssid)
{
        RAL_WRITE(sc, RT2860_MAC_BSSID_DW0,
            bssid[0] | bssid[1] << 8 | bssid[2] << 16 | bssid[3] << 24);
        RAL_WRITE(sc, RT2860_MAC_BSSID_DW1,
            bssid[4] | bssid[5] << 8);
}

static void
rt2860_set_macaddr(struct rt2860_softc *sc, const uint8_t *addr)
{
        RAL_WRITE(sc, RT2860_MAC_ADDR_DW0,
            addr[0] | addr[1] << 8 | addr[2] << 16 | addr[3] << 24);
        RAL_WRITE(sc, RT2860_MAC_ADDR_DW1,
            addr[4] | addr[5] << 8 | 0xff << 16);
}

static void
rt2860_updateslot(struct ieee80211com *ic)
{
        struct rt2860_softc *sc = ic->ic_softc;
        uint32_t tmp;

        tmp = RAL_READ(sc, RT2860_BKOFF_SLOT_CFG);
        tmp &= ~0xff;
        tmp |= IEEE80211_GET_SLOTTIME(ic);
        RAL_WRITE(sc, RT2860_BKOFF_SLOT_CFG, tmp);
}

static void
rt2860_updateprot(struct rt2860_softc *sc)
{
        struct ieee80211com *ic = &sc->sc_ic;
        uint32_t tmp;

        tmp = RT2860_RTSTH_EN | RT2860_PROT_NAV_SHORT | RT2860_TXOP_ALLOW_ALL;
        /* setup protection frame rate (MCS code) */
        tmp |= IEEE80211_IS_CHAN_5GHZ(ic->ic_curchan) ?
            rt2860_rates[RT2860_RIDX_OFDM6].mcs :
            rt2860_rates[RT2860_RIDX_CCK11].mcs;

        /* CCK frames don't require protection */
        RAL_WRITE(sc, RT2860_CCK_PROT_CFG, tmp);

        if (ic->ic_flags & IEEE80211_F_USEPROT) {
                if (ic->ic_protmode == IEEE80211_PROT_RTSCTS)
                        tmp |= RT2860_PROT_CTRL_RTS_CTS;
                else if (ic->ic_protmode == IEEE80211_PROT_CTSONLY)
                        tmp |= RT2860_PROT_CTRL_CTS;
        }
        RAL_WRITE(sc, RT2860_OFDM_PROT_CFG, tmp);
}

static void
rt2860_update_promisc(struct ieee80211com *ic)
{
        struct rt2860_softc *sc = ic->ic_softc;
        uint32_t tmp;

        tmp = RAL_READ(sc, RT2860_RX_FILTR_CFG);
        tmp &= ~RT2860_DROP_NOT_MYBSS;
        if (ic->ic_promisc == 0)
                tmp |= RT2860_DROP_NOT_MYBSS;
        RAL_WRITE(sc, RT2860_RX_FILTR_CFG, tmp);
}

static int
rt2860_updateedca(struct ieee80211com *ic)
{
        struct rt2860_softc *sc = ic->ic_softc;
        struct chanAccParams chp;
        const struct wmeParams *wmep;
        int aci;

        ieee80211_wme_ic_getparams(ic, &chp);

        wmep = chp.cap_wmeParams;

        /* update MAC TX configuration registers */
        for (aci = 0; aci < WME_NUM_AC; aci++) {
                RAL_WRITE(sc, RT2860_EDCA_AC_CFG(aci),
                    wmep[aci].wmep_logcwmax << 16 |
                    wmep[aci].wmep_logcwmin << 12 |
                    wmep[aci].wmep_aifsn  <<  8 |
                    wmep[aci].wmep_txopLimit);
        }

        /* update SCH/DMA registers too */
        RAL_WRITE(sc, RT2860_WMM_AIFSN_CFG,
            wmep[WME_AC_VO].wmep_aifsn  << 12 |
            wmep[WME_AC_VI].wmep_aifsn  <<  8 |
            wmep[WME_AC_BK].wmep_aifsn  <<  4 |
            wmep[WME_AC_BE].wmep_aifsn);
        RAL_WRITE(sc, RT2860_WMM_CWMIN_CFG,
            wmep[WME_AC_VO].wmep_logcwmin << 12 |
            wmep[WME_AC_VI].wmep_logcwmin <<  8 |
            wmep[WME_AC_BK].wmep_logcwmin <<  4 |
            wmep[WME_AC_BE].wmep_logcwmin);
        RAL_WRITE(sc, RT2860_WMM_CWMAX_CFG,
            wmep[WME_AC_VO].wmep_logcwmax << 12 |
            wmep[WME_AC_VI].wmep_logcwmax <<  8 |
            wmep[WME_AC_BK].wmep_logcwmax <<  4 |
            wmep[WME_AC_BE].wmep_logcwmax);
        RAL_WRITE(sc, RT2860_WMM_TXOP0_CFG,
            wmep[WME_AC_BK].wmep_txopLimit << 16 |
            wmep[WME_AC_BE].wmep_txopLimit);
        RAL_WRITE(sc, RT2860_WMM_TXOP1_CFG,
            wmep[WME_AC_VO].wmep_txopLimit << 16 |
            wmep[WME_AC_VI].wmep_txopLimit);

        return 0;
}

#ifdef HW_CRYPTO
static int
rt2860_set_key(struct ieee80211com *ic, struct ieee80211_node *ni,
    struct ieee80211_key *k)
{
        struct rt2860_softc *sc = ic->ic_softc;
        bus_size_t base;
        uint32_t attr;
        uint8_t mode, wcid, iv[8];

        /* defer setting of WEP keys until interface is brought up */
        if ((ic->ic_if.if_flags & (IFF_UP | IFF_RUNNING)) !=
            (IFF_UP | IFF_RUNNING))
                return 0;

        /* map net80211 cipher to RT2860 security mode */
        switch (k->k_cipher) {
        case IEEE80211_CIPHER_WEP40:
                mode = RT2860_MODE_WEP40;
                break;
        case IEEE80211_CIPHER_WEP104:
                mode = RT2860_MODE_WEP104;
                break;
        case IEEE80211_CIPHER_TKIP:
                mode = RT2860_MODE_TKIP;
                break;
        case IEEE80211_CIPHER_CCMP:
                mode = RT2860_MODE_AES_CCMP;
                break;
        default:
                return EINVAL;
        }

        if (k->k_flags & IEEE80211_KEY_GROUP) {
                wcid = 0;       /* NB: update WCID0 for group keys */
                base = RT2860_SKEY(0, k->k_id);
        } else {
                wcid = ((struct rt2860_node *)ni)->wcid;
                base = RT2860_PKEY(wcid);
        }

        if (k->k_cipher == IEEE80211_CIPHER_TKIP) {
                RAL_WRITE_REGION_1(sc, base, k->k_key, 16);
#ifndef IEEE80211_STA_ONLY
                if (ic->ic_opmode == IEEE80211_M_HOSTAP) {
                        RAL_WRITE_REGION_1(sc, base + 16, &k->k_key[16], 8);
                        RAL_WRITE_REGION_1(sc, base + 24, &k->k_key[24], 8);
                } else
#endif
                {
                        RAL_WRITE_REGION_1(sc, base + 16, &k->k_key[24], 8);
                        RAL_WRITE_REGION_1(sc, base + 24, &k->k_key[16], 8);
                }
        } else
                RAL_WRITE_REGION_1(sc, base, k->k_key, k->k_len);

        if (!(k->k_flags & IEEE80211_KEY_GROUP) ||
            (k->k_flags & IEEE80211_KEY_TX)) {
                /* set initial packet number in IV+EIV */
                if (k->k_cipher == IEEE80211_CIPHER_WEP40 ||
                    k->k_cipher == IEEE80211_CIPHER_WEP104) {
                        uint32_t val = arc4random();
                        /* skip weak IVs from Fluhrer/Mantin/Shamir */
                        if (val >= 0x03ff00 && (val & 0xf8ff00) == 0x00ff00)
                                val += 0x000100;
                        iv[0] = val;
                        iv[1] = val >> 8;
                        iv[2] = val >> 16;
                        iv[3] = k->k_id << 6;
                        iv[4] = iv[5] = iv[6] = iv[7] = 0;
                } else {
                        if (k->k_cipher == IEEE80211_CIPHER_TKIP) {
                                iv[0] = k->k_tsc >> 8;
                                iv[1] = (iv[0] | 0x20) & 0x7f;
                                iv[2] = k->k_tsc;
                        } else /* CCMP */ {
                                iv[0] = k->k_tsc;
                                iv[1] = k->k_tsc >> 8;
                                iv[2] = 0;
                        }
                        iv[3] = k->k_id << 6 | IEEE80211_WEP_EXTIV;
                        iv[4] = k->k_tsc >> 16;
                        iv[5] = k->k_tsc >> 24;
                        iv[6] = k->k_tsc >> 32;
                        iv[7] = k->k_tsc >> 40;
                }
                RAL_WRITE_REGION_1(sc, RT2860_IVEIV(wcid), iv, 8);
        }

        if (k->k_flags & IEEE80211_KEY_GROUP) {
                /* install group key */
                attr = RAL_READ(sc, RT2860_SKEY_MODE_0_7);
                attr &= ~(0xf << (k->k_id * 4));
                attr |= mode << (k->k_id * 4);
                RAL_WRITE(sc, RT2860_SKEY_MODE_0_7, attr);
        } else {
                /* install pairwise key */
                attr = RAL_READ(sc, RT2860_WCID_ATTR(wcid));
                attr = (attr & ~0xf) | (mode << 1) | RT2860_RX_PKEY_EN;
                RAL_WRITE(sc, RT2860_WCID_ATTR(wcid), attr);
        }
        return 0;
}

static void
rt2860_delete_key(struct ieee80211com *ic, struct ieee80211_node *ni,
    struct ieee80211_key *k)
{
        struct rt2860_softc *sc = ic->ic_softc;
        uint32_t attr;
        uint8_t wcid;

        if (k->k_flags & IEEE80211_KEY_GROUP) {
                /* remove group key */
                attr = RAL_READ(sc, RT2860_SKEY_MODE_0_7);
                attr &= ~(0xf << (k->k_id * 4));
                RAL_WRITE(sc, RT2860_SKEY_MODE_0_7, attr);

        } else {
                /* remove pairwise key */
                wcid = ((struct rt2860_node *)ni)->wcid;
                attr = RAL_READ(sc, RT2860_WCID_ATTR(wcid));
                attr &= ~0xf;
                RAL_WRITE(sc, RT2860_WCID_ATTR(wcid), attr);
        }
}
#endif

static int8_t
rt2860_rssi2dbm(struct rt2860_softc *sc, uint8_t rssi, uint8_t rxchain)
{
        struct ieee80211com *ic = &sc->sc_ic;
        struct ieee80211_channel *c = ic->ic_curchan;
        int delta;

        if (IEEE80211_IS_CHAN_5GHZ(c)) {
                u_int chan = ieee80211_chan2ieee(ic, c);
                delta = sc->rssi_5ghz[rxchain];

                /* determine channel group */
                if (chan <= 64)
                        delta -= sc->lna[1];
                else if (chan <= 128)
                        delta -= sc->lna[2];
                else
                        delta -= sc->lna[3];
        } else
                delta = sc->rssi_2ghz[rxchain] - sc->lna[0];

        return -12 - delta - rssi;
}

/*
 * Add `delta' (signed) to each 4-bit sub-word of a 32-bit word.
 * Used to adjust per-rate Tx power registers.
 */
static __inline uint32_t
b4inc(uint32_t b32, int8_t delta)
{
        int8_t i, b4;

        for (i = 0; i < 8; i++) {
                b4 = b32 & 0xf;
                b4 += delta;
                if (b4 < 0)
                        b4 = 0;
                else if (b4 > 0xf)
                        b4 = 0xf;
                b32 = b32 >> 4 | (uint32_t)b4 << 28;
        }
        return b32;
}

static const char *
rt2860_get_rf(uint16_t rev)
{
        switch (rev) {
        case RT2860_RF_2820:    return "RT2820";
        case RT2860_RF_2850:    return "RT2850";
        case RT2860_RF_2720:    return "RT2720";
        case RT2860_RF_2750:    return "RT2750";
        case RT3070_RF_3020:    return "RT3020";
        case RT3070_RF_2020:    return "RT2020";
        case RT3070_RF_3021:    return "RT3021";
        case RT3070_RF_3022:    return "RT3022";
        case RT3070_RF_3052:    return "RT3052";
        case RT3070_RF_3320:    return "RT3320";
        case RT3070_RF_3053:    return "RT3053";
        case RT5390_RF_5360:    return "RT5360";
        case RT5390_RF_5390:    return "RT5390";
        default:                return "unknown";
        }
}

static int
rt2860_read_eeprom(struct rt2860_softc *sc, uint8_t macaddr[IEEE80211_ADDR_LEN])
{
        int8_t delta_2ghz, delta_5ghz;
        uint32_t tmp;
        uint16_t val;
        int ridx, ant, i;

        /* check whether the ROM is eFUSE ROM or EEPROM */
        sc->sc_srom_read = rt2860_eeprom_read_2;
        if (sc->mac_ver >= 0x3071) {
                tmp = RAL_READ(sc, RT3070_EFUSE_CTRL);
                DPRINTF(("EFUSE_CTRL=0x%08x\n", tmp));
                if (tmp & RT3070_SEL_EFUSE)
                        sc->sc_srom_read = rt3090_efuse_read_2;
        }

#ifdef RAL_DEBUG
        /* read EEPROM version */
        val = rt2860_srom_read(sc, RT2860_EEPROM_VERSION);
        DPRINTF(("EEPROM rev=%d, FAE=%d\n", val >> 8, val & 0xff));
#endif

        /* read MAC address */
        val = rt2860_srom_read(sc, RT2860_EEPROM_MAC01);
        macaddr[0] = val & 0xff;
        macaddr[1] = val >> 8;
        val = rt2860_srom_read(sc, RT2860_EEPROM_MAC23);
        macaddr[2] = val & 0xff;
        macaddr[3] = val >> 8;
        val = rt2860_srom_read(sc, RT2860_EEPROM_MAC45);
        macaddr[4] = val & 0xff;
        macaddr[5] = val >> 8;

#ifdef RAL_DEBUG
        /* read country code */
        val = rt2860_srom_read(sc, RT2860_EEPROM_COUNTRY);
        DPRINTF(("EEPROM region code=0x%04x\n", val));
#endif

        /* read vendor BBP settings */
        for (i = 0; i < 8; i++) {
                val = rt2860_srom_read(sc, RT2860_EEPROM_BBP_BASE + i);
                sc->bbp[i].val = val & 0xff;
                sc->bbp[i].reg = val >> 8;
                DPRINTF(("BBP%d=0x%02x\n", sc->bbp[i].reg, sc->bbp[i].val));
        }
        if (sc->mac_ver >= 0x3071) {
                /* read vendor RF settings */
                for (i = 0; i < 10; i++) {
                        val = rt2860_srom_read(sc, RT3071_EEPROM_RF_BASE + i);
                        sc->rf[i].val = val & 0xff;
                        sc->rf[i].reg = val >> 8;
                        DPRINTF(("RF%d=0x%02x\n", sc->rf[i].reg,
                            sc->rf[i].val));
                }
        }

        /* read RF frequency offset from EEPROM */
        val = rt2860_srom_read(sc, RT2860_EEPROM_FREQ_LEDS);
        sc->freq = ((val & 0xff) != 0xff) ? val & 0xff : 0;
        DPRINTF(("EEPROM freq offset %d\n", sc->freq & 0xff));
        if ((val >> 8) != 0xff) {
                /* read LEDs operating mode */
                sc->leds = val >> 8;
                sc->led[0] = rt2860_srom_read(sc, RT2860_EEPROM_LED1);
                sc->led[1] = rt2860_srom_read(sc, RT2860_EEPROM_LED2);
                sc->led[2] = rt2860_srom_read(sc, RT2860_EEPROM_LED3);
        } else {
                /* broken EEPROM, use default settings */
                sc->leds = 0x01;
                sc->led[0] = 0x5555;
                sc->led[1] = 0x2221;
                sc->led[2] = 0xa9f8;
        }
        DPRINTF(("EEPROM LED mode=0x%02x, LEDs=0x%04x/0x%04x/0x%04x\n",
            sc->leds, sc->led[0], sc->led[1], sc->led[2]));

        /* read RF information */
        val = rt2860_srom_read(sc, RT2860_EEPROM_ANTENNA);
        if (sc->mac_ver >= 0x5390)
                sc->rf_rev = rt2860_srom_read(sc, RT2860_EEPROM_CHIPID);
        else
                sc->rf_rev = (val >> 8) & 0xf;
        sc->ntxchains = (val >> 4) & 0xf;
        sc->nrxchains = val & 0xf;
        DPRINTF(("EEPROM RF rev=0x%02x chains=%dT%dR\n",
            sc->rf_rev, sc->ntxchains, sc->nrxchains));

        /* check if RF supports automatic Tx access gain control */
        val = rt2860_srom_read(sc, RT2860_EEPROM_CONFIG);
        DPRINTF(("EEPROM CFG 0x%04x\n", val));
        /* check if driver should patch the DAC issue */
        if ((val >> 8) != 0xff)
                sc->patch_dac = (val >> 15) & 1;
        if ((val & 0xff) != 0xff) {
                sc->ext_5ghz_lna = (val >> 3) & 1;
                sc->ext_2ghz_lna = (val >> 2) & 1;
                /* check if RF supports automatic Tx access gain control */
                sc->calib_2ghz = sc->calib_5ghz = 0; /* XXX (val >> 1) & 1 */
                /* check if we have a hardware radio switch */
                sc->rfswitch = val & 1;
        }
        if (sc->sc_flags & RT2860_ADVANCED_PS) {
                /* read PCIe power save level */
                val = rt2860_srom_read(sc, RT2860_EEPROM_PCIE_PSLEVEL);
                if ((val & 0xff) != 0xff) {
                        sc->pslevel = val & 0x3;
                        val = rt2860_srom_read(sc, RT2860_EEPROM_REV);
                        if ((val & 0xff80) != 0x9280)
                                sc->pslevel = MIN(sc->pslevel, 1);
                        DPRINTF(("EEPROM PCIe PS Level=%d\n", sc->pslevel));
                }
        }

        /* read power settings for 2GHz channels */
        for (i = 0; i < 14; i += 2) {
                val = rt2860_srom_read(sc,
                    RT2860_EEPROM_PWR2GHZ_BASE1 + i / 2);
                sc->txpow1[i + 0] = (int8_t)(val & 0xff);
                sc->txpow1[i + 1] = (int8_t)(val >> 8);

                if (sc->mac_ver != 0x5390) {
                        val = rt2860_srom_read(sc,
                            RT2860_EEPROM_PWR2GHZ_BASE2 + i / 2);
                        sc->txpow2[i + 0] = (int8_t)(val & 0xff);
                        sc->txpow2[i + 1] = (int8_t)(val >> 8);
                }
        }
        /* fix broken Tx power entries */
        for (i = 0; i < 14; i++) {
                if (sc->txpow1[i] < 0 ||
                    sc->txpow1[i] > ((sc->mac_ver >= 0x5390) ? 39 : 31))
                        sc->txpow1[i] = 5;
                if (sc->mac_ver != 0x5390) {
                        if (sc->txpow2[i] < 0 ||
                            sc->txpow2[i] > ((sc->mac_ver == 0x5392) ? 39 : 31))
                                sc->txpow2[i] = 5;
                }
                DPRINTF(("chan %d: power1=%d, power2=%d\n",
                    rt2860_rf2850[i].chan, sc->txpow1[i], sc->txpow2[i]));
        }
        /* read power settings for 5GHz channels */
        for (i = 0; i < 40; i += 2) {
                val = rt2860_srom_read(sc,
                    RT2860_EEPROM_PWR5GHZ_BASE1 + i / 2);
                sc->txpow1[i + 14] = (int8_t)(val & 0xff);
                sc->txpow1[i + 15] = (int8_t)(val >> 8);

                val = rt2860_srom_read(sc,
                    RT2860_EEPROM_PWR5GHZ_BASE2 + i / 2);
                sc->txpow2[i + 14] = (int8_t)(val & 0xff);
                sc->txpow2[i + 15] = (int8_t)(val >> 8);
        }
        /* fix broken Tx power entries */
        for (i = 0; i < 40; i++) {
                if (sc->txpow1[14 + i] < -7 || sc->txpow1[14 + i] > 15)
                        sc->txpow1[14 + i] = 5;
                if (sc->txpow2[14 + i] < -7 || sc->txpow2[14 + i] > 15)
                        sc->txpow2[14 + i] = 5;
                DPRINTF(("chan %d: power1=%d, power2=%d\n",
                    rt2860_rf2850[14 + i].chan, sc->txpow1[14 + i],
                    sc->txpow2[14 + i]));
        }

        /* read Tx power compensation for each Tx rate */
        val = rt2860_srom_read(sc, RT2860_EEPROM_DELTAPWR);
        delta_2ghz = delta_5ghz = 0;
        if ((val & 0xff) != 0xff && (val & 0x80)) {
                delta_2ghz = val & 0xf;
                if (!(val & 0x40))      /* negative number */
                        delta_2ghz = -delta_2ghz;
        }
        val >>= 8;
        if ((val & 0xff) != 0xff && (val & 0x80)) {
                delta_5ghz = val & 0xf;
                if (!(val & 0x40))      /* negative number */
                        delta_5ghz = -delta_5ghz;
        }
        DPRINTF(("power compensation=%d (2GHz), %d (5GHz)\n",
            delta_2ghz, delta_5ghz));

        for (ridx = 0; ridx < 5; ridx++) {
                uint32_t reg;

                val = rt2860_srom_read(sc, RT2860_EEPROM_RPWR + ridx * 2);
                reg = val;
                val = rt2860_srom_read(sc, RT2860_EEPROM_RPWR + ridx * 2 + 1);
                reg |= (uint32_t)val << 16;

                sc->txpow20mhz[ridx] = reg;
                sc->txpow40mhz_2ghz[ridx] = b4inc(reg, delta_2ghz);
                sc->txpow40mhz_5ghz[ridx] = b4inc(reg, delta_5ghz);

                DPRINTF(("ridx %d: power 20MHz=0x%08x, 40MHz/2GHz=0x%08x, "
                    "40MHz/5GHz=0x%08x\n", ridx, sc->txpow20mhz[ridx],
                    sc->txpow40mhz_2ghz[ridx], sc->txpow40mhz_5ghz[ridx]));
        }

        /* read factory-calibrated samples for temperature compensation */
        val = rt2860_srom_read(sc, RT2860_EEPROM_TSSI1_2GHZ);
        sc->tssi_2ghz[0] = val & 0xff;  /* [-4] */
        sc->tssi_2ghz[1] = val >> 8;    /* [-3] */
        val = rt2860_srom_read(sc, RT2860_EEPROM_TSSI2_2GHZ);
        sc->tssi_2ghz[2] = val & 0xff;  /* [-2] */
        sc->tssi_2ghz[3] = val >> 8;    /* [-1] */
        val = rt2860_srom_read(sc, RT2860_EEPROM_TSSI3_2GHZ);
        sc->tssi_2ghz[4] = val & 0xff;  /* [+0] */
        sc->tssi_2ghz[5] = val >> 8;    /* [+1] */
        val = rt2860_srom_read(sc, RT2860_EEPROM_TSSI4_2GHZ);
        sc->tssi_2ghz[6] = val & 0xff;  /* [+2] */
        sc->tssi_2ghz[7] = val >> 8;    /* [+3] */
        val = rt2860_srom_read(sc, RT2860_EEPROM_TSSI5_2GHZ);
        sc->tssi_2ghz[8] = val & 0xff;  /* [+4] */
        sc->step_2ghz = val >> 8;
        DPRINTF(("TSSI 2GHz: 0x%02x 0x%02x 0x%02x 0x%02x 0x%02x 0x%02x 0x%02x "
            "0x%02x 0x%02x step=%d\n", sc->tssi_2ghz[0], sc->tssi_2ghz[1],
            sc->tssi_2ghz[2], sc->tssi_2ghz[3], sc->tssi_2ghz[4],
            sc->tssi_2ghz[5], sc->tssi_2ghz[6], sc->tssi_2ghz[7],
            sc->tssi_2ghz[8], sc->step_2ghz));
        /* check that ref value is correct, otherwise disable calibration */
        if (sc->tssi_2ghz[4] == 0xff)
                sc->calib_2ghz = 0;

        val = rt2860_srom_read(sc, RT2860_EEPROM_TSSI1_5GHZ);
        sc->tssi_5ghz[0] = val & 0xff;  /* [-4] */
        sc->tssi_5ghz[1] = val >> 8;    /* [-3] */
        val = rt2860_srom_read(sc, RT2860_EEPROM_TSSI2_5GHZ);
        sc->tssi_5ghz[2] = val & 0xff;  /* [-2] */
        sc->tssi_5ghz[3] = val >> 8;    /* [-1] */
        val = rt2860_srom_read(sc, RT2860_EEPROM_TSSI3_5GHZ);
        sc->tssi_5ghz[4] = val & 0xff;  /* [+0] */
        sc->tssi_5ghz[5] = val >> 8;    /* [+1] */
        val = rt2860_srom_read(sc, RT2860_EEPROM_TSSI4_5GHZ);
        sc->tssi_5ghz[6] = val & 0xff;  /* [+2] */
        sc->tssi_5ghz[7] = val >> 8;    /* [+3] */
        val = rt2860_srom_read(sc, RT2860_EEPROM_TSSI5_5GHZ);
        sc->tssi_5ghz[8] = val & 0xff;  /* [+4] */
        sc->step_5ghz = val >> 8;
        DPRINTF(("TSSI 5GHz: 0x%02x 0x%02x 0x%02x 0x%02x 0x%02x 0x%02x 0x%02x "
            "0x%02x 0x%02x step=%d\n", sc->tssi_5ghz[0], sc->tssi_5ghz[1],
            sc->tssi_5ghz[2], sc->tssi_5ghz[3], sc->tssi_5ghz[4],
            sc->tssi_5ghz[5], sc->tssi_5ghz[6], sc->tssi_5ghz[7],
            sc->tssi_5ghz[8], sc->step_5ghz));
        /* check that ref value is correct, otherwise disable calibration */
        if (sc->tssi_5ghz[4] == 0xff)
                sc->calib_5ghz = 0;

        /* read RSSI offsets and LNA gains from EEPROM */
        val = rt2860_srom_read(sc, RT2860_EEPROM_RSSI1_2GHZ);
        sc->rssi_2ghz[0] = val & 0xff;  /* Ant A */
        sc->rssi_2ghz[1] = val >> 8;    /* Ant B */
        val = rt2860_srom_read(sc, RT2860_EEPROM_RSSI2_2GHZ);
        if (sc->mac_ver >= 0x3071) {
                /*
                 * On RT3090 chips (limited to 2 Rx chains), this ROM
                 * field contains the Tx mixer gain for the 2GHz band.
                 */
                if ((val & 0xff) != 0xff)
                        sc->txmixgain_2ghz = val & 0x7;
                DPRINTF(("tx mixer gain=%u (2GHz)\n", sc->txmixgain_2ghz));
        } else
                sc->rssi_2ghz[2] = val & 0xff;  /* Ant C */
        sc->lna[2] = val >> 8;          /* channel group 2 */

        val = rt2860_srom_read(sc, RT2860_EEPROM_RSSI1_5GHZ);
        sc->rssi_5ghz[0] = val & 0xff;  /* Ant A */
        sc->rssi_5ghz[1] = val >> 8;    /* Ant B */
        val = rt2860_srom_read(sc, RT2860_EEPROM_RSSI2_5GHZ);
        sc->rssi_5ghz[2] = val & 0xff;  /* Ant C */
        sc->lna[3] = val >> 8;          /* channel group 3 */

        val = rt2860_srom_read(sc, RT2860_EEPROM_LNA);
        if (sc->mac_ver >= 0x3071)
                sc->lna[0] = RT3090_DEF_LNA;
        else                            /* channel group 0 */
                sc->lna[0] = val & 0xff;
        sc->lna[1] = val >> 8;          /* channel group 1 */

        /* fix broken 5GHz LNA entries */
        if (sc->lna[2] == 0 || sc->lna[2] == 0xff) {
                DPRINTF(("invalid LNA for channel group %d\n", 2));
                sc->lna[2] = sc->lna[1];
        }
        if (sc->lna[3] == 0 || sc->lna[3] == 0xff) {
                DPRINTF(("invalid LNA for channel group %d\n", 3));
                sc->lna[3] = sc->lna[1];
        }

        /* fix broken RSSI offset entries */
        for (ant = 0; ant < 3; ant++) {
                if (sc->rssi_2ghz[ant] < -10 || sc->rssi_2ghz[ant] > 10) {
                        DPRINTF(("invalid RSSI%d offset: %d (2GHz)\n",
                            ant + 1, sc->rssi_2ghz[ant]));
                        sc->rssi_2ghz[ant] = 0;
                }
                if (sc->rssi_5ghz[ant] < -10 || sc->rssi_5ghz[ant] > 10) {
                        DPRINTF(("invalid RSSI%d offset: %d (5GHz)\n",
                            ant + 1, sc->rssi_5ghz[ant]));
                        sc->rssi_5ghz[ant] = 0;
                }
        }

        return 0;
}

static int
rt2860_bbp_init(struct rt2860_softc *sc)
{
        int i, ntries;

        /* wait for BBP to wake up */
        for (ntries = 0; ntries < 20; ntries++) {
                uint8_t bbp0 = rt2860_mcu_bbp_read(sc, 0);
                if (bbp0 != 0 && bbp0 != 0xff)
                        break;
        }
        if (ntries == 20) {
                device_printf(sc->sc_dev,
                    "timeout waiting for BBP to wake up\n");
                return (ETIMEDOUT);
        }

        /* initialize BBP registers to default values */
        if (sc->mac_ver >= 0x5390)
                rt5390_bbp_init(sc);
        else {
                for (i = 0; i < nitems(rt2860_def_bbp); i++) {
                        rt2860_mcu_bbp_write(sc, rt2860_def_bbp[i].reg,
                            rt2860_def_bbp[i].val);
                }
        }

        /* fix BBP84 for RT2860E */
        if (sc->mac_ver == 0x2860 && sc->mac_rev != 0x0101)
                rt2860_mcu_bbp_write(sc, 84, 0x19);

        if (sc->mac_ver >= 0x3071) {
                rt2860_mcu_bbp_write(sc, 79, 0x13);
                rt2860_mcu_bbp_write(sc, 80, 0x05);
                rt2860_mcu_bbp_write(sc, 81, 0x33);
        } else if (sc->mac_ver == 0x2860 && sc->mac_rev == 0x0100) {
                rt2860_mcu_bbp_write(sc, 69, 0x16);
                rt2860_mcu_bbp_write(sc, 73, 0x12);
        }

        return 0;
}

static void
rt5390_bbp_init(struct rt2860_softc *sc)
{
        uint8_t bbp;
        int i;

        /* Apply maximum likelihood detection for 2 stream case. */
        if (sc->nrxchains > 1) {
                bbp = rt2860_mcu_bbp_read(sc, 105);
                rt2860_mcu_bbp_write(sc, 105, bbp | RT5390_MLD);
        }

        /* Avoid data lost and CRC error. */
        bbp = rt2860_mcu_bbp_read(sc, 4);
        rt2860_mcu_bbp_write(sc, 4, bbp | RT5390_MAC_IF_CTRL);

        for (i = 0; i < nitems(rt5390_def_bbp); i++) {
                rt2860_mcu_bbp_write(sc, rt5390_def_bbp[i].reg,
                    rt5390_def_bbp[i].val);
        }

        if (sc->mac_ver == 0x5392) {
                rt2860_mcu_bbp_write(sc, 84, 0x9a);
                rt2860_mcu_bbp_write(sc, 95, 0x9a);
                rt2860_mcu_bbp_write(sc, 98, 0x12);
                rt2860_mcu_bbp_write(sc, 106, 0x05);
                rt2860_mcu_bbp_write(sc, 134, 0xd0);
                rt2860_mcu_bbp_write(sc, 135, 0xf6);
        }

        bbp = rt2860_mcu_bbp_read(sc, 152);
        rt2860_mcu_bbp_write(sc, 152, bbp | 0x80);

        /* Disable hardware antenna diversity. */
        if (sc->mac_ver == 0x5390)
                rt2860_mcu_bbp_write(sc, 154, 0);
}

static int
rt2860_txrx_enable(struct rt2860_softc *sc)
{
        struct ieee80211com *ic = &sc->sc_ic;
        uint32_t tmp;
        int ntries;

        /* enable Tx/Rx DMA engine */
        RAL_WRITE(sc, RT2860_MAC_SYS_CTRL, RT2860_MAC_TX_EN);
        RAL_BARRIER_READ_WRITE(sc);
        for (ntries = 0; ntries < 200; ntries++) {
                tmp = RAL_READ(sc, RT2860_WPDMA_GLO_CFG);
                if ((tmp & (RT2860_TX_DMA_BUSY | RT2860_RX_DMA_BUSY)) == 0)
                        break;
                DELAY(1000);
        }
        if (ntries == 200) {
                device_printf(sc->sc_dev, "timeout waiting for DMA engine\n");
                return ETIMEDOUT;
        }

        DELAY(50);

        tmp |= RT2860_RX_DMA_EN | RT2860_TX_DMA_EN |
            RT2860_WPDMA_BT_SIZE64 << RT2860_WPDMA_BT_SIZE_SHIFT;
        RAL_WRITE(sc, RT2860_WPDMA_GLO_CFG, tmp);

        /* set Rx filter */
        tmp = RT2860_DROP_CRC_ERR | RT2860_DROP_PHY_ERR;
        if (ic->ic_opmode != IEEE80211_M_MONITOR) {
                tmp |= RT2860_DROP_UC_NOME | RT2860_DROP_DUPL |
                    RT2860_DROP_CTS | RT2860_DROP_BA | RT2860_DROP_ACK |
                    RT2860_DROP_VER_ERR | RT2860_DROP_CTRL_RSV |
                    RT2860_DROP_CFACK | RT2860_DROP_CFEND;
                if (ic->ic_opmode == IEEE80211_M_STA)
                        tmp |= RT2860_DROP_RTS | RT2860_DROP_PSPOLL;
        }
        RAL_WRITE(sc, RT2860_RX_FILTR_CFG, tmp);

        RAL_WRITE(sc, RT2860_MAC_SYS_CTRL,
            RT2860_MAC_RX_EN | RT2860_MAC_TX_EN);

        return 0;
}

static void
rt2860_init(void *arg)
{
        struct rt2860_softc *sc = arg;
        struct ieee80211com *ic = &sc->sc_ic;

        RAL_LOCK(sc);
        rt2860_init_locked(sc);
        RAL_UNLOCK(sc);

        if (sc->sc_flags & RT2860_RUNNING)
                ieee80211_start_all(ic);
}

static void
rt2860_init_locked(struct rt2860_softc *sc)
{
        struct ieee80211com *ic = &sc->sc_ic;
        struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps);
        uint32_t tmp;
        uint8_t bbp1, bbp3;
        int i, qid, ridx, ntries, error;

        RAL_LOCK_ASSERT(sc);

        if (sc->rfswitch) {
                /* hardware has a radio switch on GPIO pin 2 */
                if (!(RAL_READ(sc, RT2860_GPIO_CTRL) & (1 << 2))) {
                        device_printf(sc->sc_dev,
                            "radio is disabled by hardware switch\n");
#ifdef notyet
                        rt2860_stop_locked(sc);
                        return;
#endif
                }
        }
        RAL_WRITE(sc, RT2860_PWR_PIN_CFG, RT2860_IO_RA_PE);

        /* disable DMA */
        tmp = RAL_READ(sc, RT2860_WPDMA_GLO_CFG);
        tmp &= ~(RT2860_RX_DMA_BUSY | RT2860_RX_DMA_EN | RT2860_TX_DMA_BUSY |
            RT2860_TX_DMA_EN);
        tmp |= RT2860_TX_WB_DDONE;
        RAL_WRITE(sc, RT2860_WPDMA_GLO_CFG, tmp);

        /* reset DMA indexes */
        RAL_WRITE(sc, RT2860_WPDMA_RST_IDX, RT2860_RST_DRX_IDX0 |
            RT2860_RST_DTX_IDX5 | RT2860_RST_DTX_IDX4 | RT2860_RST_DTX_IDX3 |
            RT2860_RST_DTX_IDX2 | RT2860_RST_DTX_IDX1 | RT2860_RST_DTX_IDX0);

        /* PBF hardware reset */
        RAL_WRITE(sc, RT2860_SYS_CTRL, 0xe1f);
        RAL_BARRIER_WRITE(sc);
        RAL_WRITE(sc, RT2860_SYS_CTRL, 0xe00);

        if ((error = rt2860_load_microcode(sc)) != 0) {
                device_printf(sc->sc_dev, "could not load 8051 microcode\n");
                rt2860_stop_locked(sc);
                return;
        }

        rt2860_set_macaddr(sc, vap ? vap->iv_myaddr : ic->ic_macaddr);

        /* init Tx power for all Tx rates (from EEPROM) */
        for (ridx = 0; ridx < 5; ridx++) {
                if (sc->txpow20mhz[ridx] == 0xffffffff)
                        continue;
                RAL_WRITE(sc, RT2860_TX_PWR_CFG(ridx), sc->txpow20mhz[ridx]);
        }

        for (ntries = 0; ntries < 100; ntries++) {
                tmp = RAL_READ(sc, RT2860_WPDMA_GLO_CFG);
                if ((tmp & (RT2860_TX_DMA_BUSY | RT2860_RX_DMA_BUSY)) == 0)
                        break;
                DELAY(1000);
        }
        if (ntries == 100) {
                device_printf(sc->sc_dev, "timeout waiting for DMA engine\n");
                rt2860_stop_locked(sc);
                return;
        }
        tmp &= ~(RT2860_RX_DMA_BUSY | RT2860_RX_DMA_EN | RT2860_TX_DMA_BUSY |
            RT2860_TX_DMA_EN);
        tmp |= RT2860_TX_WB_DDONE;
        RAL_WRITE(sc, RT2860_WPDMA_GLO_CFG, tmp);

        /* reset Rx ring and all 6 Tx rings */
        RAL_WRITE(sc, RT2860_WPDMA_RST_IDX, 0x1003f);

        /* PBF hardware reset */
        RAL_WRITE(sc, RT2860_SYS_CTRL, 0xe1f);
        RAL_BARRIER_WRITE(sc);
        RAL_WRITE(sc, RT2860_SYS_CTRL, 0xe00);

        RAL_WRITE(sc, RT2860_PWR_PIN_CFG, RT2860_IO_RA_PE | RT2860_IO_RF_PE);

        RAL_WRITE(sc, RT2860_MAC_SYS_CTRL, RT2860_BBP_HRST | RT2860_MAC_SRST);
        RAL_BARRIER_WRITE(sc);
        RAL_WRITE(sc, RT2860_MAC_SYS_CTRL, 0);

        for (i = 0; i < nitems(rt2860_def_mac); i++)
                RAL_WRITE(sc, rt2860_def_mac[i].reg, rt2860_def_mac[i].val);
        if (sc->mac_ver >= 0x5390)
                RAL_WRITE(sc, RT2860_TX_SW_CFG0, 0x00000404);
        else if (sc->mac_ver >= 0x3071) {
                /* set delay of PA_PE assertion to 1us (unit of 0.25us) */
                RAL_WRITE(sc, RT2860_TX_SW_CFG0,
                    4 << RT2860_DLY_PAPE_EN_SHIFT);
        }

        if (!(RAL_READ(sc, RT2860_PCI_CFG) & RT2860_PCI_CFG_PCI)) {
                sc->sc_flags |= RT2860_PCIE;
                /* PCIe has different clock cycle count than PCI */
                tmp = RAL_READ(sc, RT2860_US_CYC_CNT);
                tmp = (tmp & ~0xff) | 0x7d;
                RAL_WRITE(sc, RT2860_US_CYC_CNT, tmp);
        }

        /* wait while MAC is busy */
        for (ntries = 0; ntries < 100; ntries++) {
                if (!(RAL_READ(sc, RT2860_MAC_STATUS_REG) &
                    (RT2860_RX_STATUS_BUSY | RT2860_TX_STATUS_BUSY)))
                        break;
                DELAY(1000);
        }
        if (ntries == 100) {
                device_printf(sc->sc_dev, "timeout waiting for MAC\n");
                rt2860_stop_locked(sc);
                return;
        }

        /* clear Host to MCU mailbox */
        RAL_WRITE(sc, RT2860_H2M_BBPAGENT, 0);
        RAL_WRITE(sc, RT2860_H2M_MAILBOX, 0);

        rt2860_mcu_cmd(sc, RT2860_MCU_CMD_RFRESET, 0, 0);
        DELAY(1000);

        if ((error = rt2860_bbp_init(sc)) != 0) {
                rt2860_stop_locked(sc);
                return;
        }

        /* clear RX WCID search table */
        RAL_SET_REGION_4(sc, RT2860_WCID_ENTRY(0), 0, 512);
        /* clear pairwise key table */
        RAL_SET_REGION_4(sc, RT2860_PKEY(0), 0, 2048);
        /* clear IV/EIV table */
        RAL_SET_REGION_4(sc, RT2860_IVEIV(0), 0, 512);
        /* clear WCID attribute table */
        RAL_SET_REGION_4(sc, RT2860_WCID_ATTR(0), 0, 256);
        /* clear shared key table */
        RAL_SET_REGION_4(sc, RT2860_SKEY(0, 0), 0, 8 * 32);
        /* clear shared key mode */
        RAL_SET_REGION_4(sc, RT2860_SKEY_MODE_0_7, 0, 4);

        /* init Tx rings (4 EDCAs + HCCA + Mgt) */
        for (qid = 0; qid < 6; qid++) {
                RAL_WRITE(sc, RT2860_TX_BASE_PTR(qid), sc->txq[qid].paddr);
                RAL_WRITE(sc, RT2860_TX_MAX_CNT(qid), RT2860_TX_RING_COUNT);
                RAL_WRITE(sc, RT2860_TX_CTX_IDX(qid), 0);
        }

        /* init Rx ring */
        RAL_WRITE(sc, RT2860_RX_BASE_PTR, sc->rxq.paddr);
        RAL_WRITE(sc, RT2860_RX_MAX_CNT, RT2860_RX_RING_COUNT);
        RAL_WRITE(sc, RT2860_RX_CALC_IDX, RT2860_RX_RING_COUNT - 1);

        /* setup maximum buffer sizes */
        RAL_WRITE(sc, RT2860_MAX_LEN_CFG, 1 << 12 |
            (MCLBYTES - sizeof (struct rt2860_rxwi) - 2));

        for (ntries = 0; ntries < 100; ntries++) {
                tmp = RAL_READ(sc, RT2860_WPDMA_GLO_CFG);
                if ((tmp & (RT2860_TX_DMA_BUSY | RT2860_RX_DMA_BUSY)) == 0)
                        break;
                DELAY(1000);
        }
        if (ntries == 100) {
                device_printf(sc->sc_dev, "timeout waiting for DMA engine\n");
                rt2860_stop_locked(sc);
                return;
        }
        tmp &= ~(RT2860_RX_DMA_BUSY | RT2860_RX_DMA_EN | RT2860_TX_DMA_BUSY |
            RT2860_TX_DMA_EN);
        tmp |= RT2860_TX_WB_DDONE;
        RAL_WRITE(sc, RT2860_WPDMA_GLO_CFG, tmp);

        /* disable interrupts mitigation */
        RAL_WRITE(sc, RT2860_DELAY_INT_CFG, 0);

        /* write vendor-specific BBP values (from EEPROM) */
        for (i = 0; i < 8; i++) {
                if (sc->bbp[i].reg == 0 || sc->bbp[i].reg == 0xff)
                        continue;
                rt2860_mcu_bbp_write(sc, sc->bbp[i].reg, sc->bbp[i].val);
        }

        /* select Main antenna for 1T1R devices */
        if (sc->rf_rev == RT3070_RF_2020 ||
            sc->rf_rev == RT3070_RF_3020 ||
            sc->rf_rev == RT3070_RF_3320 ||
            sc->mac_ver == 0x5390)
                rt3090_set_rx_antenna(sc, 0);

        /* send LEDs operating mode to microcontroller */
        rt2860_mcu_cmd(sc, RT2860_MCU_CMD_LED1, sc->led[0], 0);
        rt2860_mcu_cmd(sc, RT2860_MCU_CMD_LED2, sc->led[1], 0);
        rt2860_mcu_cmd(sc, RT2860_MCU_CMD_LED3, sc->led[2], 0);

        if (sc->mac_ver >= 0x5390)
                rt5390_rf_init(sc);
        else if (sc->mac_ver >= 0x3071) {
                if ((error = rt3090_rf_init(sc)) != 0) {
                        rt2860_stop_locked(sc);
                        return;
                }
        }

        rt2860_mcu_cmd(sc, RT2860_MCU_CMD_SLEEP, 0x02ff, 1);
        rt2860_mcu_cmd(sc, RT2860_MCU_CMD_WAKEUP, 0, 1);

        if (sc->mac_ver >= 0x5390)
                rt5390_rf_wakeup(sc);
        else if (sc->mac_ver >= 0x3071)
                rt3090_rf_wakeup(sc);

        /* disable non-existing Rx chains */
        bbp3 = rt2860_mcu_bbp_read(sc, 3);
        bbp3 &= ~(1 << 3 | 1 << 4);
        if (sc->nrxchains == 2)
                bbp3 |= 1 << 3;
        else if (sc->nrxchains == 3)
                bbp3 |= 1 << 4;
        rt2860_mcu_bbp_write(sc, 3, bbp3);

        /* disable non-existing Tx chains */
        bbp1 = rt2860_mcu_bbp_read(sc, 1);
        if (sc->ntxchains == 1)
                bbp1 = (bbp1 & ~(1 << 3 | 1 << 4));
        else if (sc->mac_ver == 0x3593 && sc->ntxchains == 2)
                bbp1 = (bbp1 & ~(1 << 4)) | 1 << 3;
        else if (sc->mac_ver == 0x3593 && sc->ntxchains == 3)
                bbp1 = (bbp1 & ~(1 << 3)) | 1 << 4;
        rt2860_mcu_bbp_write(sc, 1, bbp1);

        if (sc->mac_ver >= 0x3071)
                rt3090_rf_setup(sc);

        /* select default channel */
        rt2860_switch_chan(sc, ic->ic_curchan);

        /* reset RF from MCU */
        rt2860_mcu_cmd(sc, RT2860_MCU_CMD_RFRESET, 0, 0);

        /* set RTS threshold */
        tmp = RAL_READ(sc, RT2860_TX_RTS_CFG);
        tmp &= ~0xffff00;
        tmp |= IEEE80211_RTS_DEFAULT << 8;
        RAL_WRITE(sc, RT2860_TX_RTS_CFG, tmp);

        /* setup initial protection mode */
        rt2860_updateprot(sc);

        /* turn radio LED on */
        rt2860_set_leds(sc, RT2860_LED_RADIO);

        /* enable Tx/Rx DMA engine */
        if ((error = rt2860_txrx_enable(sc)) != 0) {
                rt2860_stop_locked(sc);
                return;
        }

        /* clear pending interrupts */
        RAL_WRITE(sc, RT2860_INT_STATUS, 0xffffffff);
        /* enable interrupts */
        RAL_WRITE(sc, RT2860_INT_MASK, 0x3fffc);

        if (sc->sc_flags & RT2860_ADVANCED_PS)
                rt2860_mcu_cmd(sc, RT2860_MCU_CMD_PSLEVEL, sc->pslevel, 0);

        sc->sc_flags |= RT2860_RUNNING;

        callout_reset(&sc->watchdog_ch, hz, rt2860_watchdog, sc);
}

static void
rt2860_stop(void *arg)
{
        struct rt2860_softc *sc = arg;

        RAL_LOCK(sc);
        rt2860_stop_locked(sc);
        RAL_UNLOCK(sc);
}

static void
rt2860_stop_locked(struct rt2860_softc *sc)
{
        uint32_t tmp;
        int qid;

        if (sc->sc_flags & RT2860_RUNNING)
                rt2860_set_leds(sc, 0); /* turn all LEDs off */

        callout_stop(&sc->watchdog_ch);
        sc->sc_tx_timer = 0;
        sc->sc_flags &= ~RT2860_RUNNING;

        /* disable interrupts */
        RAL_WRITE(sc, RT2860_INT_MASK, 0);

        /* disable GP timer */
        rt2860_set_gp_timer(sc, 0);

        /* disable Rx */
        tmp = RAL_READ(sc, RT2860_MAC_SYS_CTRL);
        tmp &= ~(RT2860_MAC_RX_EN | RT2860_MAC_TX_EN);
        RAL_WRITE(sc, RT2860_MAC_SYS_CTRL, tmp);

        /* reset adapter */
        RAL_WRITE(sc, RT2860_MAC_SYS_CTRL, RT2860_BBP_HRST | RT2860_MAC_SRST);
        RAL_BARRIER_WRITE(sc);
        RAL_WRITE(sc, RT2860_MAC_SYS_CTRL, 0);

        /* reset Tx and Rx rings (and reclaim TXWIs) */
        sc->qfullmsk = 0;
        for (qid = 0; qid < 6; qid++)
                rt2860_reset_tx_ring(sc, &sc->txq[qid]);
        rt2860_reset_rx_ring(sc, &sc->rxq);
}

int
rt2860_load_microcode(struct rt2860_softc *sc)
{
        const struct firmware *fp;
        int ntries, error;

        RAL_LOCK_ASSERT(sc);

        RAL_UNLOCK(sc);
        fp = firmware_get("rt2860fw");
        RAL_LOCK(sc);
        if (fp == NULL) {
                device_printf(sc->sc_dev,
                    "unable to receive rt2860fw firmware image\n");
                return EINVAL;
        }

        /* set "host program ram write selection" bit */
        RAL_WRITE(sc, RT2860_SYS_CTRL, RT2860_HST_PM_SEL);
        /* write microcode image */
        RAL_WRITE_REGION_1(sc, RT2860_FW_BASE, fp->data, fp->datasize);
        /* kick microcontroller unit */
        RAL_WRITE(sc, RT2860_SYS_CTRL, 0);
        RAL_BARRIER_WRITE(sc);
        RAL_WRITE(sc, RT2860_SYS_CTRL, RT2860_MCU_RESET);

        RAL_WRITE(sc, RT2860_H2M_BBPAGENT, 0);
        RAL_WRITE(sc, RT2860_H2M_MAILBOX, 0);

        /* wait until microcontroller is ready */
        RAL_BARRIER_READ_WRITE(sc);
        for (ntries = 0; ntries < 1000; ntries++) {
                if (RAL_READ(sc, RT2860_SYS_CTRL) & RT2860_MCU_READY)
                        break;
                DELAY(1000);
        }
        if (ntries == 1000) {
                device_printf(sc->sc_dev,
                    "timeout waiting for MCU to initialize\n");
                error = ETIMEDOUT;
        } else
                error = 0;

        firmware_put(fp, FIRMWARE_UNLOAD);
        return error;
}

/*
 * This function is called periodically to adjust Tx power based on
 * temperature variation.
 */
#ifdef NOT_YET
static void
rt2860_calib(struct rt2860_softc *sc)
{
        struct ieee80211com *ic = &sc->sc_ic;
        const uint8_t *tssi;
        uint8_t step, bbp49;
        int8_t ridx, d;

        /* read current temperature */
        bbp49 = rt2860_mcu_bbp_read(sc, 49);

        if (IEEE80211_IS_CHAN_2GHZ(ic->ic_bss->ni_chan)) {
                tssi = &sc->tssi_2ghz[4];
                step = sc->step_2ghz;
        } else {
                tssi = &sc->tssi_5ghz[4];
                step = sc->step_5ghz;
        }

        if (bbp49 < tssi[0]) {          /* lower than reference */
                /* use higher Tx power than default */
                for (d = 0; d > -4 && bbp49 <= tssi[d - 1]; d--);
        } else if (bbp49 > tssi[0]) {   /* greater than reference */
                /* use lower Tx power than default */
                for (d = 0; d < +4 && bbp49 >= tssi[d + 1]; d++);
        } else {
                /* use default Tx power */
                d = 0;
        }
        d *= step;

        DPRINTF(("BBP49=0x%02x, adjusting Tx power by %d\n", bbp49, d));

        /* write adjusted Tx power values for each Tx rate */
        for (ridx = 0; ridx < 5; ridx++) {
                if (sc->txpow20mhz[ridx] == 0xffffffff)
                        continue;
                RAL_WRITE(sc, RT2860_TX_PWR_CFG(ridx),
                    b4inc(sc->txpow20mhz[ridx], d));
        }
}
#endif

static void
rt3090_set_rx_antenna(struct rt2860_softc *sc, int aux)
{
        uint32_t tmp;

        if (aux) {
                if (sc->mac_ver == 0x5390) {
                        rt2860_mcu_bbp_write(sc, 152, 
                            rt2860_mcu_bbp_read(sc, 152) & ~0x80);
                } else {
                        tmp = RAL_READ(sc, RT2860_PCI_EECTRL);
                        RAL_WRITE(sc, RT2860_PCI_EECTRL, tmp & ~RT2860_C);
                        tmp = RAL_READ(sc, RT2860_GPIO_CTRL);
                        RAL_WRITE(sc, RT2860_GPIO_CTRL, (tmp & ~0x0808) | 0x08);
                }
        } else {
                if (sc->mac_ver == 0x5390) {
                        rt2860_mcu_bbp_write(sc, 152, 
                            rt2860_mcu_bbp_read(sc, 152) | 0x80);
                } else {
                        tmp = RAL_READ(sc, RT2860_PCI_EECTRL);
                        RAL_WRITE(sc, RT2860_PCI_EECTRL, tmp | RT2860_C);
                        tmp = RAL_READ(sc, RT2860_GPIO_CTRL);
                        RAL_WRITE(sc, RT2860_GPIO_CTRL, tmp & ~0x0808);
                }
        }
}

static void
rt2860_switch_chan(struct rt2860_softc *sc, struct ieee80211_channel *c)
{
        struct ieee80211com *ic = &sc->sc_ic;
        u_int chan, group;

        chan = ieee80211_chan2ieee(ic, c);
        if (chan == 0 || chan == IEEE80211_CHAN_ANY)
                return;

        if (sc->mac_ver >= 0x5390)
                rt5390_set_chan(sc, chan);
        else if (sc->mac_ver >= 0x3071)
                rt3090_set_chan(sc, chan);
        else
                rt2860_set_chan(sc, chan);

        /* determine channel group */
        if (chan <= 14)
                group = 0;
        else if (chan <= 64)
                group = 1;
        else if (chan <= 128)
                group = 2;
        else
                group = 3;

        /* XXX necessary only when group has changed! */
        if (sc->mac_ver < 0x5390)
                rt2860_select_chan_group(sc, group);

        DELAY(1000);
}

static int
rt2860_setup_beacon(struct rt2860_softc *sc, struct ieee80211vap *vap)
{
        struct ieee80211com *ic = vap->iv_ic;
        struct rt2860_txwi txwi;
        struct mbuf *m;
        int ridx;

        if ((m = ieee80211_beacon_alloc(vap->iv_bss)) == NULL)
                return ENOBUFS;

        memset(&txwi, 0, sizeof txwi);
        txwi.wcid = 0xff;
        txwi.len = htole16(m->m_pkthdr.len);
        /* send beacons at the lowest available rate */
        ridx = IEEE80211_IS_CHAN_5GHZ(ic->ic_bsschan) ?
            RT2860_RIDX_OFDM6 : RT2860_RIDX_CCK1;
        txwi.phy = htole16(rt2860_rates[ridx].mcs);
        if (rt2860_rates[ridx].phy == IEEE80211_T_OFDM)
                txwi.phy |= htole16(RT2860_PHY_OFDM);
        txwi.txop = RT2860_TX_TXOP_HT;
        txwi.flags = RT2860_TX_TS;
        txwi.xflags = RT2860_TX_NSEQ;

        RAL_WRITE_REGION_1(sc, RT2860_BCN_BASE(0),
            (uint8_t *)&txwi, sizeof txwi);
        RAL_WRITE_REGION_1(sc, RT2860_BCN_BASE(0) + sizeof txwi,
            mtod(m, uint8_t *), m->m_pkthdr.len);

        m_freem(m);

        return 0;
}

static void
rt2860_enable_tsf_sync(struct rt2860_softc *sc)
{
        struct ieee80211com *ic = &sc->sc_ic;
        struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps);
        uint32_t tmp;

        tmp = RAL_READ(sc, RT2860_BCN_TIME_CFG);

        tmp &= ~0x1fffff;
        tmp |= vap->iv_bss->ni_intval * 16;
        tmp |= RT2860_TSF_TIMER_EN | RT2860_TBTT_TIMER_EN;
        if (vap->iv_opmode == IEEE80211_M_STA) {
                /*
                 * Local TSF is always updated with remote TSF on beacon
                 * reception.
                 */
                tmp |= 1 << RT2860_TSF_SYNC_MODE_SHIFT;
        }
        else if (vap->iv_opmode == IEEE80211_M_IBSS ||
            vap->iv_opmode == IEEE80211_M_MBSS) {
                tmp |= RT2860_BCN_TX_EN;
                /*
                 * Local TSF is updated with remote TSF on beacon reception
                 * only if the remote TSF is greater than local TSF.
                 */
                tmp |= 2 << RT2860_TSF_SYNC_MODE_SHIFT;
        } else if (vap->iv_opmode == IEEE80211_M_HOSTAP) {
                tmp |= RT2860_BCN_TX_EN;
                /* SYNC with nobody */
                tmp |= 3 << RT2860_TSF_SYNC_MODE_SHIFT;
        }

        RAL_WRITE(sc, RT2860_BCN_TIME_CFG, tmp);
}