root/sys/dev/ic/rt2860.c
/*      $NetBSD: rt2860.c,v 1.36 2021/06/16 00:21:18 riastradh Exp $    */
/*      $OpenBSD: rt2860.c,v 1.90 2016/04/13 10:49:26 mpi Exp $ */
/*      $FreeBSD: head/sys/dev/ral/rt2860.c 306591 2016-10-02 20:35:55Z avos $ */

/*-
 * 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.
 */

/*-
 * Ralink Technology RT2860/RT3090/RT3390/RT3562/RT5390/RT5392 chipset driver
 * http://www.ralinktech.com/
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: rt2860.c,v 1.36 2021/06/16 00:21:18 riastradh Exp $");

#include <sys/param.h>
#include <sys/sockio.h>
#include <sys/sysctl.h>
#include <sys/mbuf.h>
#include <sys/kernel.h>
#include <sys/socket.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/queue.h>
#include <sys/callout.h>
#include <sys/module.h>
#include <sys/conf.h>
#include <sys/device.h>
#include <sys/endian.h>
#include <sys/cprng.h>

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

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

#include <net80211/ieee80211_var.h>
#include <net80211/ieee80211_amrr.h>
#include <net80211/ieee80211_radiotap.h>

#include <dev/firmload.h>

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

#include <dev/pci/pcidevs.h>

#ifdef RAL_DEBUG
#define DPRINTF(x)      do { if (rt2860_debug > 0) printf x; } while (0)
#define DPRINTFN(n, x)  do { if (rt2860_debug >= (n)) printf x; } while (0)
int rt2860_debug = 0;
#else
#define DPRINTF(x)
#define DPRINTFN(n, x)
#endif
#define MAXQS   6 /* Tx (4 EDCAs + HCCA + Mgt) and Rx rings */

static void     rt2860_attachhook(device_t);
static bool     rt2860_suspend(device_t self, const pmf_qual_t *qual);
static bool     rt2860_wakeup(device_t self, const pmf_qual_t *qual);
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 struct   ieee80211_node *rt2860_node_alloc(struct ieee80211_node_table *);
static int      rt2860_media_change(struct ifnet *);
static void     rt2860_iter_func(void *, struct ieee80211_node *);
static void     rt2860_updatestats(struct rt2860_softc *);
static void     rt2860_update_promisc(struct ifnet *);
static void     rt2860_newassoc(struct ieee80211_node *,
                    int);
#ifdef notyet
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 ieee80211com *, 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 void     rt2860_start(struct ifnet *);
static void     rt2860_watchdog(struct ifnet *);
static int      rt2860_ioctl(struct ifnet *, u_long, void *);
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 *);
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 void     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_updateslot(struct ifnet *);
static void     rt2860_updateprot(struct ieee80211com *);
static int      rt2860_updateedca(struct ieee80211com *);

#ifdef HW_CRYPTO
static int      rt2860_set_key(struct ieee80211com *, 
                    const struct ieee80211_key *, const uint8_t *);
static int      rt2860_delete_key(struct ieee80211com *,
                    const struct ieee80211_key *);
#endif
static int8_t   rt2860_rssi2dbm(struct rt2860_softc *, uint8_t, uint8_t);
static const char *     rt2860_get_rf(uint32_t);
static int      rt2860_read_eeprom(struct rt2860_softc *);
static int      rt2860_bbp_init(struct rt2860_softc *);
static int      rt5390_bbp_init(struct rt2860_softc *);
static int      rt2860_txrx_enable(struct rt2860_softc *);
static int      rt2860_init(struct ifnet *);
static void     rt2860_stop(struct ifnet *, int);
static int      rt2860_load_microcode(struct rt2860_softc *);
#if 0
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 *);
#ifndef IEEE80211_STA_ONLY
static int      rt2860_setup_beacon(struct rt2860_softc *);
#endif
static void     rt2860_enable_tsf_sync(struct rt2860_softc *);
static void     rt2860_softintr(void *);

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
};

static const 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
}, rt3572_def_rf[] = {
        RT3572_DEF_RF
}, rt5390_def_rf[] = {
        RT5390_DEF_RF
}, rt5392_def_rf[] = {
        RT5392_DEF_RF
};

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

        sc->amrr.amrr_min_success_threshold =  1;
        sc->amrr.amrr_max_success_threshold = 15;

        /* 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) {
                aprint_error_dev(sc->sc_dev, 
                    "timeout waiting for NIC to initialize\n");
                return ETIMEDOUT;
        }
        sc->mac_ver = tmp >> 16;
        sc->mac_rev = tmp & 0xffff;

        if (sc->mac_ver != 0x2860 &&
            (id == PCI_PRODUCT_RALINK_RT2890 ||
             id == PCI_PRODUCT_RALINK_RT2790 ||
             id == PCI_PRODUCT_AWT_RT2890))
                sc->sc_flags |= RT2860_ADVANCED_PS;

        /* retrieve RF rev. no and various other things from EEPROM */
        rt2860_read_eeprom(sc);
        aprint_normal_dev(sc->sc_dev, "802.11 address %s\n",
            ether_sprintf(ic->ic_myaddr));
        aprint_normal_dev(sc->sc_dev, "MAC/BBP RT%X (rev 0x%04X), "
            "RF %s (MIMO %dT%dR)\n",
            sc->mac_ver, sc->mac_rev, rt2860_get_rf(sc->rf_rev),
            sc->ntxchains, sc->nrxchains);

        sc->sc_soft_ih = softint_establish(SOFTINT_NET, rt2860_softintr, sc);
        if (sc->sc_soft_ih == NULL) {
                aprint_error_dev(sc->sc_dev, "could not establish softint\n");
                error = EINVAL;
                goto fail0;
        }

        /*
         * Allocate Tx (4 EDCAs + HCCA + Mgt) and Rx rings.
         */
        for (qid = 0; qid < MAXQS; qid++) {
                if ((error = rt2860_alloc_tx_ring(sc, &sc->txq[qid])) != 0) {
                        aprint_error_dev(sc->sc_dev,
                            "could not allocate Tx ring %d\n", qid);
                        goto fail1;
                }
        }

        if ((error = rt2860_alloc_rx_ring(sc, &sc->rxq)) != 0) {
                aprint_error_dev(sc->sc_dev, "could not allocate Rx ring\n");
                goto fail1;
        }

        if ((error = rt2860_alloc_tx_pool(sc)) != 0) {
                aprint_error_dev(sc->sc_dev, "could not allocate Tx pool\n");
                goto fail2;
        }

        /* 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;

        config_mountroot(sc->sc_dev, rt2860_attachhook);

        return 0;

fail2:  rt2860_free_rx_ring(sc, &sc->rxq);
fail1:  while (--qid >= 0)
                rt2860_free_tx_ring(sc, &sc->txq[qid]);
fail0:  softint_disestablish(sc->sc_soft_ih);
        sc->sc_soft_ih = NULL;
        return error;
}

static int
firmware_load(const char *dname, const char *iname, uint8_t **ucodep,
    size_t *sizep)
{
        firmware_handle_t fh;
        int error;

        if ((error = firmware_open(dname, iname, &fh)) != 0)
                return (error);
        *sizep = firmware_get_size(fh);
        if ((*ucodep = firmware_malloc(*sizep)) == NULL) {
                firmware_close(fh);
                return (ENOMEM);
        }
        if ((error = firmware_read(fh, 0, *ucodep, *sizep)) != 0)
                firmware_free(*ucodep, *sizep);
        firmware_close(fh);

        return (error);
}

static void
rt2860_attachhook(device_t self)
{
        struct rt2860_softc *sc = device_private(self);
        struct ieee80211com *ic = &sc->sc_ic;
        struct ifnet *ifp = &sc->sc_if;
        int i, error;

        error = firmware_load("ral", "ral-rt2860", &sc->ucode, &sc->ucsize);
        if (error != 0) {
                aprint_error_dev(sc->sc_dev,
                    "error %d, could not read firmware file %s\n",
                    error, "ral-rt2860");
                return;
        }

        ic->ic_ifp = ifp;
        ic->ic_phytype = IEEE80211_T_OFDM; /* not only, but not used */
        ic->ic_opmode = IEEE80211_M_STA; /* default to BSS mode */
        ic->ic_state = IEEE80211_S_INIT;

        /* set device capabilities */
        ic->ic_caps =
            IEEE80211_C_MONITOR |       /* monitor mode supported */
#ifndef IEEE80211_STA_ONLY
            IEEE80211_C_IBSS |          /* IBSS mode supported */
            IEEE80211_C_HOSTAP |        /* HostAP mode supported */
#ifdef IEEE80211_C_APPMGT
            IEEE80211_C_APPMGT |        /* HostAP power management */
#endif
#endif
            IEEE80211_C_WDS |           /* 4-address traffic works */
            IEEE80211_C_WME |           /* 802.11e */
            IEEE80211_C_SHPREAMBLE |    /* short preamble supported */
            IEEE80211_C_SHSLOT |        /* short slot time supported */
#ifdef HW_CRYPTO
            IEEE80211_C_WEP |           /* WEP */
#endif
            IEEE80211_C_WPA;            /* 802.11i */

        if (sc->rf_rev == RT2860_RF_2750 || sc->rf_rev == RT2860_RF_2850) {
                /* set supported .11a rates */
                ic->ic_sup_rates[IEEE80211_MODE_11A] =
                    ieee80211_std_rateset_11a;

                /* set supported .11a channels */
                for (i = 14; i < (int)__arraycount(rt2860_rf2850); i++) {
                        uint8_t chan = rt2860_rf2850[i].chan;
                        ic->ic_channels[chan].ic_freq =
                            ieee80211_ieee2mhz(chan, IEEE80211_CHAN_5GHZ);
                        ic->ic_channels[chan].ic_flags = IEEE80211_CHAN_A;
                }
        }

        /* set supported .11b and .11g rates */
        ic->ic_sup_rates[IEEE80211_MODE_11B] = ieee80211_std_rateset_11b;
        ic->ic_sup_rates[IEEE80211_MODE_11G] = ieee80211_std_rateset_11g;

        /* set supported .11b and .11g channels (1 through 14) */
        for (i = 1; i <= 14; i++) {
                ic->ic_channels[i].ic_freq =
                    ieee80211_ieee2mhz(i, IEEE80211_CHAN_2GHZ);
                ic->ic_channels[i].ic_flags =
                    IEEE80211_CHAN_CCK | IEEE80211_CHAN_OFDM |
                    IEEE80211_CHAN_DYN | IEEE80211_CHAN_2GHZ;
        }

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

        ifp->if_softc = sc;
        ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
        ifp->if_init = rt2860_init;
        ifp->if_ioctl = rt2860_ioctl;
        ifp->if_start = rt2860_start;
        ifp->if_stop = rt2860_stop;
        ifp->if_watchdog = rt2860_watchdog;
        IFQ_SET_READY(&ifp->if_snd);
        memcpy(ifp->if_xname, device_xname(sc->sc_dev), IFNAMSIZ);

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

        ic->ic_node_alloc = rt2860_node_alloc;
        ic->ic_newassoc = rt2860_newassoc;
#ifdef notyet
        ic->ic_ampdu_rx_start = rt2860_ampdu_rx_start;
        ic->ic_ampdu_rx_stop = rt2860_ampdu_rx_stop;
#endif
        ic->ic_updateslot = rt2860_updateslot;
        ic->ic_wme.wme_update = rt2860_updateedca;
#ifdef HW_CRYPTO
        ic->ic_crypto.cs_key_set = rt2860_set_key;
        ic->ic_crypto.cs_key_delete = rt2860_delete_key;
#endif
        /* override state transition machine */
        sc->sc_newstate = ic->ic_newstate;
        ic->ic_newstate = rt2860_newstate;
        ieee80211_media_init(ic, rt2860_media_change, ieee80211_media_status);

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

        sc->sc_rxtap_len = roundup(sizeof(sc->sc_rxtap), sizeof(u_int32_t));
        sc->sc_rxtap.wr_ihdr.it_len = htole16(sc->sc_rxtap_len);
        sc->sc_rxtap.wr_ihdr.it_present = htole32(RT2860_RX_RADIOTAP_PRESENT);

        sc->sc_txtap_len = roundup(sizeof(sc->sc_txtap), sizeof(u_int32_t));
        sc->sc_txtap.wt_ihdr.it_len = htole16(sc->sc_txtap_len);
        sc->sc_txtap.wt_ihdr.it_present = htole32(RT2860_TX_RADIOTAP_PRESENT);

        ieee80211_announce(ic);

        if (pmf_device_register(sc->sc_dev, rt2860_wakeup, rt2860_suspend))
                pmf_class_network_register(sc->sc_dev, ifp);
        else
                aprint_error_dev(sc->sc_dev,
                    "couldn't establish power handler\n");
}

int
rt2860_detach(void *xsc)
{
        struct rt2860_softc *sc = xsc;
        struct ifnet *ifp = &sc->sc_if;
        int qid;

        pmf_device_deregister(sc->sc_dev);

        rt2860_stop(ifp, 1);

        ieee80211_ifdetach(&sc->sc_ic); /* free all nodes */
        if_detach(ifp);

        for (qid = 0; qid < MAXQS; qid++)
                rt2860_free_tx_ring(sc, &sc->txq[qid]);
        rt2860_free_rx_ring(sc, &sc->rxq);
        rt2860_free_tx_pool(sc);

        if (sc->sc_soft_ih != NULL) {
                softint_disestablish(sc->sc_soft_ih);
                sc->sc_soft_ih = NULL;
        }

        if (sc->ucode != NULL)
                firmware_free(sc->ucode, sc->ucsize);

        return 0;
}

static bool
rt2860_suspend(device_t self, const pmf_qual_t *qual)
{
        struct rt2860_softc *sc = device_private(self);
        struct ifnet *ifp = &sc->sc_if;

        if (ifp->if_flags & IFF_RUNNING)
                rt2860_stop(ifp, 1);

        return true;
}

static bool
rt2860_wakeup(device_t self, const pmf_qual_t *qual)
{
        struct rt2860_softc *sc = device_private(self);
        struct ifnet *ifp = &sc->sc_if;
        int s;

        s = splnet();
        if (ifp->if_flags & IFF_UP)
                rt2860_init(ifp);
        splx(s);

        return true;
}

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

        size = RT2860_TX_RING_COUNT * sizeof (struct rt2860_txd);

        error = bus_dmamap_create(sc->sc_dmat, size, 1, size, 0,
            BUS_DMA_NOWAIT, &ring->map);
        if (error != 0) {
                aprint_error_dev(sc->sc_dev, "could not create DMA map\n");
                goto fail;
        }

        /* Tx rings must be 4-DWORD aligned */
        error = bus_dmamem_alloc(sc->sc_dmat, size, 16, 0, &ring->seg, 1,
            &nsegs, BUS_DMA_NOWAIT);
        if (error != 0) {
                aprint_error_dev(sc->sc_dev,
                    "could not allocate DMA memory\n");
                goto fail;
        }

        error = bus_dmamem_map(sc->sc_dmat, &ring->seg, nsegs, size,
            (void **)&ring->txd, BUS_DMA_NOWAIT);
        if (error != 0) {
                aprint_error_dev(sc->sc_dev, "can't map DMA memory\n");
                goto fail;
        }

        error = bus_dmamap_load(sc->sc_dmat, ring->map, ring->txd, size, NULL,
            BUS_DMA_NOWAIT);
        if (error != 0) {
                aprint_error_dev(sc->sc_dev, "could not load DMA map\n");
                goto fail;
        }

        bus_dmamap_sync(sc->sc_dmat, ring->map, 0, size, BUS_DMASYNC_PREWRITE);

        ring->paddr = ring->map->dm_segs[0].ds_addr;

        return 0;

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

static 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->ni != NULL) {
                        ieee80211_free_node(data->ni);
                        data->ni = NULL;
                }

                if (data->m != NULL) {
                        bus_dmamap_sync(sc->sc_dmat, data->map, 0,
                            data->map->dm_mapsize, BUS_DMASYNC_POSTWRITE);
                        bus_dmamap_unload(sc->sc_dmat, data->map);
                        m_freem(data->m);
                        data->m = NULL;
                }

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

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

static 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(sc->sc_dmat, ring->map, 0,
                    ring->map->dm_mapsize, BUS_DMASYNC_POSTWRITE);
                bus_dmamap_unload(sc->sc_dmat, ring->map);
                bus_dmamem_unmap(sc->sc_dmat, (void *)ring->txd,
                    RT2860_TX_RING_COUNT * sizeof (struct rt2860_txd));
                bus_dmamem_free(sc->sc_dmat, &ring->seg, 1);
        }
        if (ring->map != NULL)
                bus_dmamap_destroy(sc->sc_dmat, ring->map);

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

                if (data->ni != NULL) {
                        ieee80211_free_node(data->ni);
                        data->ni = NULL;
                }
                if (data->m != NULL) {
                        bus_dmamap_sync(sc->sc_dmat, data->map, 0,
                            data->map->dm_mapsize, BUS_DMASYNC_POSTWRITE);
                        bus_dmamap_unload(sc->sc_dmat, data->map);
                        m_freem(data->m);
                        data->m = NULL;
                }

                SLIST_INSERT_HEAD(&sc->data_pool, data, next);
                ring->data[i] = NULL;
        }
        ring->queued = 0;
        ring->cur = ring->next = 0;
}

/*
 * Allocate a pool of TX Wireless Information blocks.
 */
static int
rt2860_alloc_tx_pool(struct rt2860_softc *sc)
{
        char *vaddr;
        bus_addr_t paddr;
        int i, nsegs, 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_dmamap_create(sc->sc_dmat, size, 1, size, 0,
            BUS_DMA_NOWAIT, &sc->txwi_map);
        if (error != 0) {
                aprint_error_dev(sc->sc_dev, "could not create DMA map\n");
                goto fail;
        }

        error = bus_dmamem_alloc(sc->sc_dmat, size, PAGE_SIZE, 0,
            &sc->txwi_seg, 1, &nsegs, BUS_DMA_NOWAIT);
        if (error != 0) {
                aprint_error_dev(sc->sc_dev,
                    "could not allocate DMA memory\n");
                goto fail;
        }

        error = bus_dmamem_map(sc->sc_dmat, &sc->txwi_seg, nsegs, size,
            &sc->txwi_vaddr, BUS_DMA_NOWAIT);
        if (error != 0) {
                aprint_error_dev(sc->sc_dev, "can't map DMA memory\n");
                goto fail;
        }

        error = bus_dmamap_load(sc->sc_dmat, sc->txwi_map, sc->txwi_vaddr,
            size, NULL, BUS_DMA_NOWAIT);
        if (error != 0) {
                aprint_error_dev(sc->sc_dev, "could not load DMA map\n");
                goto fail;
        }

        bus_dmamap_sync(sc->sc_dmat, sc->txwi_map, 0, size,
            BUS_DMASYNC_PREWRITE);

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

                error = bus_dmamap_create(sc->sc_dmat, MCLBYTES,
                    RT2860_MAX_SCATTER, MCLBYTES, 0, BUS_DMA_NOWAIT,
                    &data->map); /* <0> */
                if (error != 0) {
                        aprint_error_dev(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;
}

static void
rt2860_free_tx_pool(struct rt2860_softc *sc)
{
        if (sc->txwi_vaddr != NULL) {
                bus_dmamap_sync(sc->sc_dmat, sc->txwi_map, 0,
                    sc->txwi_map->dm_mapsize, BUS_DMASYNC_POSTWRITE);
                bus_dmamap_unload(sc->sc_dmat, sc->txwi_map);
                bus_dmamem_unmap(sc->sc_dmat, sc->txwi_vaddr,
                    RT2860_TX_POOL_COUNT * RT2860_TXWI_DMASZ);
                bus_dmamem_free(sc->sc_dmat, &sc->txwi_seg, 1);
        }
        if (sc->txwi_map != NULL)
                bus_dmamap_destroy(sc->sc_dmat, sc->txwi_map);

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

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

        size = RT2860_RX_RING_COUNT * sizeof (struct rt2860_rxd);

        error = bus_dmamap_create(sc->sc_dmat, size, 1, size, 0,
            BUS_DMA_NOWAIT, &ring->map);
        if (error != 0) {
                aprint_error_dev(sc->sc_dev, "could not create DMA map\n");
                goto fail;
        }

        /* Rx ring must be 4-DWORD aligned */
        error = bus_dmamem_alloc(sc->sc_dmat, size, 16, 0, &ring->seg, 1,
            &nsegs, BUS_DMA_NOWAIT);
        if (error != 0) {
                aprint_error_dev(sc->sc_dev,
                    "could not allocate DMA memory\n");
                goto fail;
        }

        error = bus_dmamem_map(sc->sc_dmat, &ring->seg, nsegs, size,
            (void **)&ring->rxd, BUS_DMA_NOWAIT);
        if (error != 0) {
                aprint_error_dev(sc->sc_dev, "can't map DMA memory\n");
                goto fail;
        }

        error = bus_dmamap_load(sc->sc_dmat, ring->map, ring->rxd, size, NULL,
            BUS_DMA_NOWAIT);
        if (error != 0) {
                aprint_error_dev(sc->sc_dev, "could not load DMA map\n");
                goto fail;
        }

        ring->paddr = ring->map->dm_segs[0].ds_addr;

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

                error = bus_dmamap_create(sc->sc_dmat, MCLBYTES, 1, MCLBYTES,
                    0, BUS_DMA_NOWAIT, &data->map);
                if (error != 0) {
                        aprint_error_dev(sc->sc_dev,
                            "could not create DMA map\n");
                        goto fail;
                }

                MGETHDR(data->m, M_DONTWAIT, MT_DATA);
                if (data->m == NULL) {
                        msg = "allocate Rx mbuf";
                        goto fail1;
                }
                MCLGET(data->m, M_DONTWAIT);
                if ((data->m->m_flags & M_EXT) == 0) {
                        msg = "allocate Rx mbuf cluster";
                        goto fail1;
                }


                error = bus_dmamap_load(sc->sc_dmat, data->map,
                    mtod(data->m, void *), MCLBYTES, NULL,
                    BUS_DMA_READ | BUS_DMA_NOWAIT);
                if (error != 0) {
                        msg = "load DMA map";
                fail1:
                        aprint_error_dev(sc->sc_dev, "could not %s\n", msg);
                        m_freem(data->m);
                        data->m = NULL;
                        error = ENOBUFS;
                        goto fail;
                }

                rxd->sdp0 = htole32(data->map->dm_segs[0].ds_addr);
                rxd->sdl0 = htole16(MCLBYTES);
        }

        bus_dmamap_sync(sc->sc_dmat, ring->map, 0, size, BUS_DMASYNC_PREWRITE);

        return 0;
fail:   rt2860_free_rx_ring(sc, ring);
        return error;
}

static 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(sc->sc_dmat, ring->map, 0, ring->map->dm_mapsize,
            BUS_DMASYNC_PREWRITE);

        ring->cur = 0;
}

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

        if (ring->rxd != NULL) {
                bus_dmamap_sync(sc->sc_dmat, ring->map, 0,
                    ring->map->dm_mapsize, BUS_DMASYNC_POSTWRITE);
                bus_dmamap_unload(sc->sc_dmat, ring->map);
                bus_dmamem_unmap(sc->sc_dmat, (void *)ring->rxd,
                    RT2860_RX_RING_COUNT * sizeof (struct rt2860_rxd));
                bus_dmamem_free(sc->sc_dmat, &ring->seg, 1);
                ring->rxd = NULL;
        }
        if (ring->map != NULL) {
                bus_dmamap_destroy(sc->sc_dmat, ring->map);
                ring->map = NULL;
        }

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

                if (data->m != NULL) {
                        bus_dmamap_sync(sc->sc_dmat, data->map, 0,
                            data->map->dm_mapsize, BUS_DMASYNC_POSTREAD);
                        bus_dmamap_unload(sc->sc_dmat, data->map);
                        m_freem(data->m);
                        data->m = NULL;
                }
                if (data->map != NULL) {
                        bus_dmamap_destroy(sc->sc_dmat, data->map);
                        data->map = NULL;
                }
        }
}

static struct ieee80211_node *
rt2860_node_alloc(struct ieee80211_node_table *nt)
{
        struct rt2860_node *rn = malloc(sizeof(*rn), M_80211_NODE,
            M_NOWAIT | M_ZERO);
        return rn ? &rn->ni : NULL;
}

static int
rt2860_media_change(struct ifnet *ifp)
{
        struct rt2860_softc *sc = ifp->if_softc;
        struct ieee80211com *ic = &sc->sc_ic;
        uint8_t rate, ridx;
        int error;

        error = ieee80211_media_change(ifp);
        if (error != ENETRESET)
                return error;

        if (ic->ic_fixed_rate != -1) {
                rate = ic->ic_sup_rates[ic->ic_curmode].
                    rs_rates[ic->ic_fixed_rate] & IEEE80211_RATE_VAL;
                for (ridx = 0; ridx <= RT2860_RIDX_MAX; ridx++)
                        if (rt2860_rates[ridx].rate == rate)
                                break;
                sc->fixed_ridx = ridx;
        }

        if ((ifp->if_flags & (IFF_UP | IFF_RUNNING)) ==
            (IFF_UP | IFF_RUNNING)) {
                rt2860_stop(ifp, 0);
                rt2860_init(ifp);
        }
        return 0;
}

static void
rt2860_iter_func(void *arg, struct ieee80211_node *ni)
{
        struct rt2860_softc *sc = arg;
        uint8_t wcid = ((struct rt2860_node *)ni)->wcid;

        ieee80211_amrr_choose(&sc->amrr, ni, &sc->amn[wcid]);
}

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

#ifndef IEEE80211_STA_ONLY
        /*
         * 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);
                }
        }
#endif
        s = splnet();
        if (ic->ic_opmode == IEEE80211_M_STA)
                rt2860_iter_func(sc, ic->ic_bss);
#ifndef IEEE80211_STA_ONLY
        else
                ieee80211_iterate_nodes(&ic->ic_sta, rt2860_iter_func, sc);
#endif
        splx(s);
}

static void
rt2860_newassoc(struct ieee80211_node *ni, int isnew)
{
        struct rt2860_softc *sc = ni->ni_ic->ic_ifp->if_softc;
        struct rt2860_node *rn = (void *)ni;
        struct ieee80211_rateset *rs = &ni->ni_rates;
        uint8_t rate, wcid = 0;
        int ridx, i, j;

        if (isnew && ni->ni_associd != 0) {
                /* only interested in true associations */
                wcid = rn->wcid = IEEE80211_AID(ni->ni_associd);

                /* 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));

        ieee80211_amrr_node_init(&sc->amrr, &sc->amn[wcid]);
        /* start at lowest available bit-rate, AMRR will raise */
        ni->ni_txrate = 0;

        for (i = 0; i < rs->rs_nrates; i++) {
                rate = rs->rs_rates[i] & IEEE80211_RATE_VAL;
                /* convert 802.11 rate to hardware rate index */
                for (ridx = 0; ridx < RT2860_RIDX_MAX; ridx++)
                        if (rt2860_rates[ridx].rate == rate)
                                break;
                rn->ridx[i] = ridx;
                /* determine rate of control response frames */
                for (j = i; j >= 0; j--) {
                        if ((rs->rs_rates[j] & IEEE80211_RATE_BASIC) &&
                            rt2860_rates[rn->ridx[i]].phy ==
                            rt2860_rates[rn->ridx[j]].phy)
                                break;
                }
                if (j >= 0) {
                        rn->ctl_ridx[i] = rn->ridx[j];
                } else {
                        /* no basic rate found, use mandatory one */
                        rn->ctl_ridx[i] = rt2860_rates[ridx].ctl_ridx;
                }
                DPRINTF(("rate=0x%02x ridx=%d ctl_ridx=%d\n",
                    rs->rs_rates[i], rn->ridx[i], rn->ctl_ridx[i]));
        }
}

#ifdef notyet
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 ieee80211com *ic, enum ieee80211_state nstate, int arg)
{
        struct rt2860_softc *sc = ic->ic_ifp->if_softc;
        enum ieee80211_state ostate;
        uint32_t tmp;

        ostate = ic->ic_state;

        DPRINTF(("ostate = %d nstate = %d\n", ostate, nstate));
        if (ostate == IEEE80211_S_RUN) {
                /* turn link LED off */
                rt2860_set_leds(sc, RT2860_LED_RADIO);
        }

        switch (nstate) {
        case IEEE80211_S_INIT:
                if (ostate == 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);
                break;

        case IEEE80211_S_SCAN:
                rt2860_switch_chan(sc, ic->ic_curchan);
                if (ostate != IEEE80211_S_SCAN)
                        rt2860_set_gp_timer(sc, 150);
                break;

        case IEEE80211_S_AUTH:
        case IEEE80211_S_ASSOC:
                rt2860_set_gp_timer(sc, 0);
                rt2860_switch_chan(sc, ic->ic_curchan);
                break;

        case IEEE80211_S_RUN:
                rt2860_set_gp_timer(sc, 0);
                rt2860_switch_chan(sc, ic->ic_curchan);

                if (ic->ic_opmode != IEEE80211_M_MONITOR) {
                        rt2860_updateslot(ic->ic_ifp);
                        rt2860_enable_mrr(sc);
                        rt2860_set_txpreamble(sc);
                        rt2860_set_basicrates(sc);
                        rt2860_set_bssid(sc, ic->ic_bss->ni_bssid);
                }

#ifndef IEEE80211_STA_ONLY
                if (ic->ic_opmode == IEEE80211_M_HOSTAP ||
                    ic->ic_opmode == IEEE80211_M_IBSS)
                        (void)rt2860_setup_beacon(sc);
#endif

                if (ic->ic_opmode == IEEE80211_M_STA) {
                        /* fake a join to init the tx rate */
                        rt2860_newassoc(ic->ic_bss, 1);
                }

                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(ic->ic_bss->ni_chan) ?
                     RT2860_LED_LINK_2GHZ : RT2860_LED_LINK_5GHZ));
                break;
        }

        return sc->sc_newstate(ic, nstate, arg);
}

/* 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 ifnet *ifp = &sc->sc_if;
        struct ieee80211_amrr_node *amn;
        uint32_t stat;
        uint8_t wcid, mcs, pid;

        /* drain Tx status FIFO (maxsize = 16) */
        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 no ACK was requested, no feedback is available */
                if (!(stat & RT2860_TXQ_ACKREQ) || wcid == 0xff)
                        continue;

                /* update per-STA AMRR stats */
                amn = &sc->amn[wcid];
                amn->amn_txcnt++;
                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)
                                amn->amn_retrycnt++;
                } else {
                        amn->amn_retrycnt++;
                        if_statinc(ifp, if_oerrors);
                }
        }
}

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

        s = splnet();

        rt2860_drain_stats_fifo(sc);

        hw = RAL_READ(sc, RT2860_TX_DTX_IDX(qid));
        DPRINTF(("%s: tx mbuf %#x\n", __func__, hw));
        while (ring->next != hw) {
                struct rt2860_tx_data *data = ring->data[ring->next];

                if (data != NULL) {
                        bus_dmamap_sync(sc->sc_dmat, data->map, 0,
                            data->map->dm_mapsize, BUS_DMASYNC_POSTWRITE);
                        bus_dmamap_unload(sc->sc_dmat, data->map);
                        m_freem(data->m);
                        data->m = NULL;
                        ieee80211_free_node(data->ni);
                        data->ni = NULL;

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

                        if_statinc(ifp, if_opackets);
                }
                ring->queued--;
                ring->next = (ring->next + 1) % RT2860_TX_RING_COUNT;
        }

        sc->sc_tx_timer = 0;
        if (ring->queued <= RT2860_TX_RING_ONEMORE)
                sc->qfullmsk &= ~(1 << qid);
        ifp->if_flags &= ~IFF_OACTIVE;
        rt2860_start(ifp); /* in softint */

        splx(s);
}

/*
 * 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 ieee80211com *ic = &sc->sc_ic;
        struct ifnet *ifp = &sc->sc_if;
        struct ieee80211_frame *wh;
        struct ieee80211_node *ni;
        struct mbuf *m, *m1;
        uint32_t hw;
        uint8_t ant, rssi;
        int error, s;
        struct rt2860_rx_radiotap_header *tap;
        uint16_t phy;

        hw = RAL_READ(sc, RT2860_FS_DRX_IDX) & 0xfff;
        DPRINTF(("%s: rx mbuf %#x\n", __func__, hw));
        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->sc_dmat, sc->rxq.map,
                    sc->rxq.cur * sizeof (struct rt2860_rxd),
                    sizeof (struct rt2860_rxd), 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))) {
                        DPRINTF(("error %#x\n", rxd->flags));
                        if_statinc(ifp, if_ierrors);
                        goto skip;
                }


                MGETHDR(m1, M_DONTWAIT, MT_DATA);
                if (__predict_false(m1 == NULL)) {
                        DPRINTF(("error2 %#x\n", rxd->flags));
                        if_statinc(ifp, if_ierrors);
                        goto skip;
                }
                MCLGET(m1, M_DONTWAIT);
                if (__predict_false((m1->m_flags & M_EXT) == 0)) {
                        DPRINTF(("no mbuf\n"));
                        m_freem(m1);
                        if_statinc(ifp, if_ierrors);
                        goto skip;
                }

                bus_dmamap_sync(sc->sc_dmat, data->map, 0,
                    data->map->dm_mapsize, BUS_DMASYNC_POSTREAD);
                bus_dmamap_unload(sc->sc_dmat, data->map);

                error = bus_dmamap_load(sc->sc_dmat, data->map,
                    mtod(m1, void *), MCLBYTES, NULL,
                    BUS_DMA_READ | BUS_DMA_NOWAIT);
                if (__predict_false(error != 0)) {
                        DPRINTF(("dma error %d\n", error));
                        m_freem(m1);

                        /* try to reload the old mbuf */
                        error = bus_dmamap_load(sc->sc_dmat, data->map,
                            mtod(data->m, void *), MCLBYTES, NULL,
                            BUS_DMA_READ | BUS_DMA_NOWAIT);
                        if (__predict_false(error != 0)) {
                                panic("%s: could not load old rx mbuf",
                                    device_xname(sc->sc_dev));
                        }
                        /* physical address may have changed */
                        rxd->sdp0 = htole32(data->map->dm_segs[0].ds_addr);
                        if_statinc(ifp, if_ierrors);
                        goto skip;
                }

                /*
                 * New mbuf successfully loaded, update Rx ring and continue
                 * processing.
                 */
                m = data->m;
                data->m = m1;
                rxd->sdp0 = htole32(data->map->dm_segs[0].ds_addr);

                rxwi = mtod(m, struct rt2860_rxwi *);

                /* finalize mbuf */
                m->m_data = (void *)(rxwi + 1);
                m_set_rcvif(m, ifp);
                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);
                        memmove((char *)wh + 2, wh, hdrlen);
                        m->m_data += 2;
                        wh = mtod(m, struct ieee80211_frame *);
                }

#ifdef HW_CRYPTO
                if (__predict_false(rxd->flags & htole32(RT2860_RX_MICERR))) {
                        /* report MIC failures to net80211 for TKIP */
                        ieee80211_notify_michael_failure(ic, wh, 0/* XXX */);
                        DPRINTF(("error2 %#x\n", rxd->flags));
                        if_statinc(ifp, if_ierrors);
                        goto skip;
                }
#endif
                ant = rt2860_maxrssi_chain(sc, rxwi);
                rssi = rxwi->rssi[ant];

                s = splnet();

                if (__predict_true(sc->sc_drvbpf == NULL))
                        goto skipbpf;

                tap = &sc->sc_rxtap;
                tap->wr_flags = 0;
                tap->wr_chan_freq = htole16(ic->ic_curchan->ic_freq);
                tap->wr_chan_flags = htole16(ic->ic_curchan->ic_flags);
                tap->wr_antsignal = rssi;
                tap->wr_antenna = ant;
                tap->wr_dbm_antsignal = rt2860_rssi2dbm(sc, rssi, ant);
                tap->wr_rate = 2;       /* in case it can't be found below */
                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;
                }
                bpf_mtap2(sc->sc_drvbpf, tap, sc->sc_rxtap_len, m, BPF_D_IN);
skipbpf:
                /* grab a reference to the source node */
                ni = ieee80211_find_rxnode(ic,
                    (struct ieee80211_frame_min *)wh);

                /* send the frame to the 802.11 layer */
                ieee80211_input(ic, m, ni, rssi, 0);

                /* node is no longer needed */
                ieee80211_free_node(ni);

                splx(s);

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

                bus_dmamap_sync(sc->sc_dmat, sc->rxq.map,
                    sc->rxq.cur * sizeof (struct rt2860_rxd),
                    sizeof (struct rt2860_rxd), 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)
{
        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);

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

static void
rt2860_gp_intr(struct rt2860_softc *sc)
{
        struct ieee80211com *ic = &sc->sc_ic;
        int s;

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

        s = splnet();
        if (ic->ic_state == IEEE80211_S_SCAN)
                ieee80211_next_scan(ic);
        else if (ic->ic_state == IEEE80211_S_RUN)
                rt2860_updatestats(sc);
        splx(s);
}

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

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

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

static void
rt2860_softintr(void *arg)
{
        struct rt2860_softc *sc = arg;
        uint32_t r;

        r = RAL_READ(sc, RT2860_INT_STATUS);
        if (__predict_false(r == 0xffffffff))
                goto out;       /* device likely went away */
        if (r == 0)
                goto out;

        /* 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);

out:
        /* enable interrupts */
        RAL_WRITE(sc, RT2860_INT_MASK, 0x3fffc);
}

static int
rt2860_tx(struct rt2860_softc *sc, struct mbuf **m0, struct ieee80211_node *ni)
{
        struct ieee80211com *ic = &sc->sc_ic;
        struct rt2860_node *rn = (void *)ni;
        struct rt2860_tx_ring *ring;
        struct rt2860_tx_data *data;
        struct rt2860_txd *txd;
        struct rt2860_txwi *txwi;
        struct ieee80211_frame *wh;
        struct mbuf *m = *m0;
        bus_dma_segment_t *seg;
        u_int hdrlen;
        uint16_t qos, dur;
        uint8_t type, qsel, mcs, pid, tid, qid;
        int nsegs, hasqos, ridx, ctl_ridx;

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

        wh = mtod(m, struct ieee80211_frame *);
#ifndef HW_CRYPTO
        if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) {
                struct ieee80211_key *k = ieee80211_crypto_encap(ic, ni, m);
                if (k == NULL) {
                        m_freem(m);
                        *m0 = NULL;
                        return ENOBUFS;
                }

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

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

        if ((hasqos = ieee80211_has_qos(wh))) {
                qos = ieee80211_get_qos(wh);
                tid = qos & IEEE80211_QOS_TID;
                qid = TID_TO_WME_AC(tid);
        } else {
                qos = 0;
                tid = 0;
                qid = (type == IEEE80211_FC0_TYPE_MGT) ?
                    sc->mgtqid : WME_AC_BE;
        }
        KASSERT(qid < MAXQS);
        ring = &sc->txq[qid];

        /* pickup a rate index */
        if (IEEE80211_IS_MULTICAST(wh->i_addr1) ||
            type != IEEE80211_FC0_TYPE_DATA) {
                ridx = (ic->ic_curmode == IEEE80211_MODE_11A) ?
                    RT2860_RIDX_OFDM6 : RT2860_RIDX_CCK1;
                ctl_ridx = rt2860_rates[ridx].ctl_ridx;
        } else if (ic->ic_fixed_rate != -1) {
                ridx = sc->fixed_ridx;
                ctl_ridx = rt2860_rates[ridx].ctl_ridx;
        } else {
                ridx = rn->ridx[ni->ni_txrate];
                ctl_ridx = rn->ctl_ridx[ni->ni_txrate];
        }

        /* 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 = hasqos ? 0 : RT2860_TX_NSEQ;
        txwi->wcid = (type == IEEE80211_FC0_TYPE_DATA) ? rn->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 > ic->ic_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) &&
            (!hasqos || (qos & IEEE80211_QOS_ACKPOLICY) !=
             IEEE80211_QOS_ACKPOLICY_NOACK)) {
                txwi->xflags |= RT2860_TX_ACK;

                if (ic->ic_flags & IEEE80211_F_SHPREAMBLE)
                        dur = rt2860_rates[ctl_ridx].sp_ack_dur;
                else
                        dur = rt2860_rates[ctl_ridx].lp_ack_dur;
                *(uint16_t *)wh->i_dur = htole16(dur);
        }
#ifndef IEEE80211_STA_ONLY
        /* ask MAC to insert timestamp into probe responses */
        if ((wh->i_fc[0] &
             (IEEE80211_FC0_TYPE_MASK | IEEE80211_FC0_SUBTYPE_MASK)) ==
             (IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_RESP))
            /* NOTE: beacons do not pass through tx_data() */
                txwi->flags |= RT2860_TX_TS;
#endif

        if (__predict_false(sc->sc_drvbpf != NULL)) {
                struct rt2860_tx_radiotap_header *tap = &sc->sc_txtap;

                tap->wt_flags = 0;
                tap->wt_rate = rt2860_rates[ridx].rate;
                tap->wt_chan_freq = htole16(ic->ic_curchan->ic_freq);
                tap->wt_chan_flags = htole16(ic->ic_curchan->ic_flags);
                tap->wt_hwqueue = qid;
                if (mcs & RT2860_PHY_SHPRE)
                        tap->wt_flags |= IEEE80211_RADIOTAP_F_SHORTPRE;

                bpf_mtap2(sc->sc_drvbpf, tap, sc->sc_txtap_len, m, BPF_D_OUT);
        }

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

        KASSERT (ring->queued <= RT2860_TX_RING_ONEMORE); /* <1> */
        if (bus_dmamap_load_mbuf(sc->sc_dmat, data->map, m, BUS_DMA_NOWAIT)) {
                struct mbuf *m_new = m_defrag(m, M_DONTWAIT);
                if (m_new != NULL) {
                        /* m got freed */
                        m = m_new;
                        *m0 = m_new;
                } else {
                        return (ENOBUFS);
                }
                if (bus_dmamap_load_mbuf(sc->sc_dmat,
                    data->map, m, BUS_DMA_NOWAIT))
                        return (EFBIG);
        }

        /* The map will fit into the tx ring: (a "full" ring may have a few
         * unused descriptors, at most (txds(MAX_SCATTER) - 1))
         *
         *   ring->queued + txds(data->map->nsegs)
         * <=   { <0> data->map->nsegs <= MAX_SCATTER }
         *   ring->queued + txds(MAX_SCATTER)
         * <=   { <1> ring->queued <= TX_RING_MAX - txds(MAX_SCATTER) }
         *   TX_RING_MAX - txds(MAX_SCATTER) + txds(MAX_SCATTER)
         * <=   { arithmetic }
         *   TX_RING_MAX
         */

        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) + hdrlen);
        txd->flags = qsel;

        /* setup payload segments */
        seg = data->map->dm_segs;
        for (nsegs = data->map->dm_nsegs; nsegs >= 2; nsegs -= 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 (nsegs > 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->sc_dmat, sc->txwi_map,
            (uintptr_t)txwi - (uintptr_t)sc->txwi_vaddr, RT2860_TXWI_DMASZ,
            BUS_DMASYNC_PREWRITE);
        bus_dmamap_sync(sc->sc_dmat, data->map, 0, data->map->dm_mapsize,
            BUS_DMASYNC_PREWRITE);
        bus_dmamap_sync(sc->sc_dmat, ring->map, 0, ring->map->dm_mapsize,
            BUS_DMASYNC_PREWRITE);

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

        ring->cur = (ring->cur + 1) % RT2860_TX_RING_COUNT;
        ring->queued += 1 + (data->map->dm_nsegs / 2);
        if (ring->queued > RT2860_TX_RING_ONEMORE)
                sc->qfullmsk |= 1 << qid;

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

        return 0;
}

static void
rt2860_start(struct ifnet *ifp)
{
        struct rt2860_softc *sc = ifp->if_softc;
        struct ieee80211com *ic = &sc->sc_ic;
        struct ether_header *eh;
        struct ieee80211_node *ni;
        struct mbuf *m;

        if ((ifp->if_flags & (IFF_RUNNING | IFF_OACTIVE)) != IFF_RUNNING)
                return;

        for (;;) {
                if (SLIST_EMPTY(&sc->data_pool) || sc->qfullmsk != 0) {
                        DPRINTF(("%s: stuffup\n", __func__));
                        ifp->if_flags |= IFF_OACTIVE;
                        break;
                }
                /* send pending management frames first */
                IF_DEQUEUE(&ic->ic_mgtq, m);
                if (m != NULL) {
                        ni = M_GETCTX(m, struct ieee80211_node *);
                        M_CLEARCTX(m);
                        DPRINTF(("%s: send management\n", __func__));
                        goto sendit;
                }
                if (ic->ic_state != IEEE80211_S_RUN) {
                        DPRINTF(("%s: not running %d\n", __func__,
                            ic->ic_state));
                        break;
                }

                /* encapsulate and send data frames */
                IFQ_DEQUEUE(&ifp->if_snd, m);
                if (m == NULL) {
                        DPRINTF(("%s: nothing to send\n", __func__));
                        break;
                }
                if (m->m_len < (int)sizeof(*eh) &&
                    (m = m_pullup(m, sizeof(*eh))) == NULL) {
                        DPRINTF(("%s: nothing to send\n", __func__));
                        if_statinc(ifp, if_oerrors);
                        continue;
                }

                eh = mtod(m, struct ether_header *);

                ni = ieee80211_find_txnode(ic, eh->ether_dhost);
                if (ni == NULL) {
                        DPRINTF(("%s: can't find tx node\n", __func__));
                        m_freem(m);
                        if_statinc(ifp, if_oerrors);
                        continue;
                }

                bpf_mtap(ifp, m, BPF_D_OUT);

                if ((m = ieee80211_encap(ic, m, ni)) == NULL) {
                        DPRINTF(("%s: can't encap\n", __func__));
                        ieee80211_free_node(ni);
                        if_statinc(ifp, if_oerrors);
                        continue;
                }
sendit:
                bpf_mtap3(ic->ic_rawbpf, m, BPF_D_OUT);

                if (rt2860_tx(sc, &m, ni) != 0) {
                        DPRINTF(("%s: can't tx\n", __func__));
                        m_freem(m);
                        ieee80211_free_node(ni);
                        if_statinc(ifp, if_oerrors);
                        continue;
                }

                sc->sc_tx_timer = 5;
                ifp->if_timer = 1;
        }
}

static void
rt2860_watchdog(struct ifnet *ifp)
{
        struct rt2860_softc *sc = ifp->if_softc;
        struct ieee80211com *ic = &sc->sc_ic;

        ifp->if_timer = 0;

        if (sc->sc_tx_timer > 0) {
                if (--sc->sc_tx_timer == 0) {
                        aprint_error_dev(sc->sc_dev, "device timeout\n");
                        rt2860_stop(ifp, 0);
                        rt2860_init(ifp);
                        if_statinc(ifp, if_oerrors);
                        return;
                }
                ifp->if_timer = 1;
        }

        ieee80211_watchdog(ic);
}

static int
rt2860_ioctl(struct ifnet *ifp, u_long cmd, void *data)
{
        struct rt2860_softc *sc = ifp->if_softc;
        struct ieee80211com *ic = &sc->sc_ic;
        int s, error = 0;

        s = splnet();

        switch (cmd) {
        case SIOCSIFFLAGS:
                if ((error = ifioctl_common(ifp, cmd, data)) != 0)
                        break;
                switch (ifp->if_flags & (IFF_UP|IFF_RUNNING)) {
                case IFF_UP|IFF_RUNNING:
                        rt2860_update_promisc(ifp);
                        break;
                case IFF_UP:
                        rt2860_init(ifp);
                        break;
                case IFF_RUNNING:
                        rt2860_stop(ifp, 1);
                        break;
                case 0:
                        break;
                }
                break;

        case SIOCADDMULTI:
        case SIOCDELMULTI:
                if ((error = ether_ioctl(ifp, cmd, data)) == ENETRESET) {
                        /* setup multicast filter, etc */
                        error = 0;
                }
                break;

        case SIOCS80211CHANNEL:
                /*
                 * This allows for fast channel switching in monitor mode
                 * (used by kismet). In IBSS mode, we must explicitly reset
                 * the interface to generate a new beacon frame.
                 */
                error = ieee80211_ioctl(ic, cmd, data);
                if (error == ENETRESET &&
                    ic->ic_opmode == IEEE80211_M_MONITOR) {
                        if ((ifp->if_flags & (IFF_UP | IFF_RUNNING)) ==
                            (IFF_UP | IFF_RUNNING))
                                rt2860_switch_chan(sc, ic->ic_ibss_chan);
                        error = 0;
                }
                break;

        default:
                error = ieee80211_ioctl(ic, cmd, data);
        }

        if (error == ENETRESET) {
                if ((ifp->if_flags & (IFF_UP | IFF_RUNNING)) ==
                    (IFF_UP | IFF_RUNNING)) {
                        rt2860_stop(ifp, 0);
                        rt2860_init(ifp);
                }
                error = 0;
        }

        splx(s);

        return error;
}

/*
 * 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.
 */
static 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) {
                aprint_error_dev(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);
}

static 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) {
                aprint_error_dev(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);
        }
        aprint_error_dev(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) {
                aprint_error_dev(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) {
                aprint_error_dev(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) {
                aprint_error_dev(sc->sc_dev, "could not read RF register\n");
                return 0xff;
        }
        return tmp & 0xff;
}

static 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) {
                aprint_error_dev(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.
 */
static 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)
{
        uint32_t tmp;

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

static void
rt2860_set_basicrates(struct rt2860_softc *sc)
{
        struct ieee80211com *ic = &sc->sc_ic;

        /* set basic rates mask */
        if (ic->ic_curmode == IEEE80211_MODE_11B)
                RAL_WRITE(sc, RT2860_LEGACY_BASIC_RATE, 0x003);
        else if (ic->ic_curmode == IEEE80211_MODE_11A)
                RAL_WRITE(sc, RT2860_LEGACY_BASIC_RATE, 0x150);
        else    /* 11g */
                RAL_WRITE(sc, RT2860_LEGACY_BASIC_RATE, 0x15f);
}

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

        /* Wait for BBP to settle */
        DELAY(1000);

        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->mac_ver == 0x3572)
                        rt2860_mcu_bbp_write(sc, 82, 0x94);
                else
                        rt2860_mcu_bbp_write(sc, 82, 0xf2);

                if (sc->ext_5ghz_lna)
                        rt2860_mcu_bbp_write(sc, 75, 0x46);
                else
                        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;
        }
        if (sc->mac_ver == 0x3572) {
                rt3090_rf_write(sc, 8, 0x00);
                RAL_WRITE(sc, RT2860_TX_PIN_CFG, tmp);
                rt3090_rf_write(sc, 8, 0x80);
        } else
                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 */
                if (sc->mac_ver == 0x3572)
                        agc = 0x22 + (sc->lna[group] * 5) / 3;
                else
                        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;

        KASSERT(chan >= 1 && chan <= 14);       /* RT3090 is 2GHz only */

        /* 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);

        /* 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 void
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 */
        if (sc->mac_ver == 0x3572) {
                for (i = 0; i < (int)__arraycount(rt3572_def_rf); i++) {
                        rt3090_rf_write(sc, rt3572_def_rf[i].reg,
                            rt3572_def_rf[i].val);
                }
        } else {
                for (i = 0; i < (int)__arraycount(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);
}

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 < __arraycount(rt5392_def_rf); i++) {
                        rt3090_rf_write(sc, rt5392_def_rf[i].reg,
                            rt5392_def_rf[i].val);
                }
        } else {
                for (i = 0; i < __arraycount(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 ifnet *ifp)
{
        struct rt2860_softc *sc = ifp->if_softc;
        struct ieee80211com *ic = &sc->sc_ic;
        uint32_t tmp;

        tmp = RAL_READ(sc, RT2860_BKOFF_SLOT_CFG);
        tmp &= ~0xff;
        tmp |= (ic->ic_flags & IEEE80211_F_SHSLOT) ? 9 : 20;
        RAL_WRITE(sc, RT2860_BKOFF_SLOT_CFG, tmp);
}

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

        tmp = RT2860_RTSTH_EN | RT2860_PROT_NAV_SHORT | RT2860_TXOP_ALLOW_ALL;
        /* setup protection frame rate (MCS code) */
        tmp |= (ic->ic_curmode == IEEE80211_MODE_11A) ?
            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 ifnet *ifp)
{
        struct rt2860_softc *sc = ifp->if_softc;
        uint32_t tmp;

        tmp = RAL_READ(sc, RT2860_RX_FILTR_CFG);
        tmp &= ~RT2860_DROP_NOT_MYBSS;
        if (!(ifp->if_flags & IFF_PROMISC))
                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_ifp->if_softc;
        int aci;

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

        /* update SCH/DMA registers too */
        RAL_WRITE(sc, RT2860_WMM_AIFSN_CFG,
            ic->ic_wme.wme_params[WME_AC_VO].wmep_aifsn  << 12 |
            ic->ic_wme.wme_params[WME_AC_VI].wmep_aifsn  <<  8 |
            ic->ic_wme.wme_params[WME_AC_BK].wmep_aifsn  <<  4 |
            ic->ic_wme.wme_params[WME_AC_BE].wmep_aifsn);
        RAL_WRITE(sc, RT2860_WMM_CWMIN_CFG,
            ic->ic_wme.wme_params[WME_AC_VO].wmep_logcwmin << 12 |
            ic->ic_wme.wme_params[WME_AC_VI].wmep_logcwmin <<  8 |
            ic->ic_wme.wme_params[WME_AC_BK].wmep_logcwmin <<  4 |
            ic->ic_wme.wme_params[WME_AC_BE].wmep_logcwmin);
        RAL_WRITE(sc, RT2860_WMM_CWMAX_CFG,
            ic->ic_wme.wme_params[WME_AC_VO].wmep_logcwmax << 12 |
            ic->ic_wme.wme_params[WME_AC_VI].wmep_logcwmax <<  8 |
            ic->ic_wme.wme_params[WME_AC_BK].wmep_logcwmax <<  4 |
            ic->ic_wme.wme_params[WME_AC_BE].wmep_logcwmax);
        RAL_WRITE(sc, RT2860_WMM_TXOP0_CFG,
            ic->ic_wme.wme_params[WME_AC_BK].wmep_txopLimit << 16 |
            ic->ic_wme.wme_params[WME_AC_BE].wmep_txopLimit);
        RAL_WRITE(sc, RT2860_WMM_TXOP1_CFG,
            ic->ic_wme.wme_params[WME_AC_VO].wmep_txopLimit << 16 |
            ic->ic_wme.wme_params[WME_AC_VI].wmep_txopLimit);
        return 0;
}

#ifdef HW_CRYPTO
static int
rt2860_set_key(struct ieee80211com *ic, const struct ieee80211_key *ck,
    const uint8_t *mac)
{
        struct rt2860_softc *sc = ic->ic_ifp->if_softc;
        struct ieee80211_node *ni = ic->ic_bss;
        bus_size_t base;
        uint32_t attr;
        uint8_t mode, wcid, iv[8];
        struct ieee80211_key *k = __UNCONST(ck); /* XXX */

        DPRINTF(("%s: cipher %d\n", __func__, k->wk_cipher->ic_cipher));
        /* defer setting of WEP keys until interface is brought up */
        if ((ic->ic_ifp->if_flags & (IFF_UP | IFF_RUNNING)) !=
            (IFF_UP | IFF_RUNNING)) {
                DPRINTF(("%s: not running %d\n", __func__,
                    k->wk_cipher->ic_cipher));
                return 1;
        }
        /* map net80211 cipher to RT2860 security mode */
        switch (k->wk_cipher->ic_cipher) {
        case IEEE80211_CIPHER_WEP:
                k->wk_flags |= IEEE80211_KEY_GROUP; /* XXX */
                if (k->wk_keylen == 5)
                        mode = RT2860_MODE_WEP40;
                else
                        mode = RT2860_MODE_WEP104;
                break;
        case IEEE80211_CIPHER_TKIP:
                mode = RT2860_MODE_TKIP;
                break;
        case IEEE80211_CIPHER_AES_CCM:
                mode = RT2860_MODE_AES_CCMP;
                break;
        default:
                DPRINTF(("%s: bad\n", __func__));
                return 0;
        }

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

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

        if (!(k->wk_flags & IEEE80211_KEY_GROUP) ||
            (k->wk_flags & IEEE80211_KEY_XMIT)) {
                /* set initial packet number in IV+EIV */
                if (k->wk_cipher->ic_cipher == IEEE80211_CIPHER_WEP) {
                        uint32_t val = cprng_fast32();
                        /* 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->wk_keyix << 6;
                        iv[4] = iv[5] = iv[6] = iv[7] = 0;
                } else {
                        if (k->wk_cipher->ic_cipher == IEEE80211_CIPHER_TKIP) {
                                iv[0] = k->wk_keytsc >> 8;
                                iv[1] = (iv[0] | 0x20) & 0x7f;
                                iv[2] = k->wk_keytsc;
                        } else /* CCMP */ {
                                iv[0] = k->wk_keytsc;
                                iv[1] = k->wk_keytsc >> 8;
                                iv[2] = 0;
                        }
                        iv[3] = k->wk_keyix << 6 | IEEE80211_WEP_EXTIV;
                        iv[4] = k->wk_keytsc >> 16;
                        iv[5] = k->wk_keytsc >> 24;
                        iv[6] = k->wk_keytsc >> 32;
                        iv[7] = k->wk_keytsc >> 40;
                }
                RAL_WRITE_REGION_1(sc, RT2860_IVEIV(wcid), iv, 8);
        }

        if (k->wk_flags & IEEE80211_KEY_GROUP) {
                /* install group key */
                attr = RAL_READ(sc, RT2860_SKEY_MODE_0_7);
                attr &= ~(0xf << (k->wk_keyix * 4));
                attr |= mode << (k->wk_keyix * 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);
        }
        DPRINTF(("%s: ok\n", __func__));
        return 1;
}

static int
rt2860_delete_key(struct ieee80211com *ic, const struct ieee80211_key *k)
{
        struct rt2860_softc *sc = ic->ic_ifp->if_softc;
        struct ieee80211_node *ni = ic->ic_bss;
        uint32_t attr;
        uint8_t wcid;

        if (k->wk_flags & IEEE80211_KEY_GROUP) {
                /* remove group key */
                attr = RAL_READ(sc, RT2860_SKEY_MODE_0_7);
                attr &= ~(0xf << (k->wk_keyix * 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);
        }
        return 1;
}
#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(uint32_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";
        case RT5390_RF_5392:    return "RT5392";
        default:                return "unknown";
        }
}

static int
rt2860_read_eeprom(struct rt2860_softc *sc)
{
        struct ieee80211com *ic = &sc->sc_ic;
        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 & 0xff, val >> 8));
#endif

        /* read MAC address */
        val = rt2860_srom_read(sc, RT2860_EEPROM_MAC01);
        ic->ic_myaddr[0] = val & 0xff;
        ic->ic_myaddr[1] = val >> 8;
        val = rt2860_srom_read(sc, RT2860_EEPROM_MAC23);
        ic->ic_myaddr[2] = val & 0xff;
        ic->ic_myaddr[3] = val >> 8;
        val = rt2860_srom_read(sc, RT2860_EEPROM_MAC45);
        ic->ic_myaddr[4] = val & 0xff;
        ic->ic_myaddr[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) {
                aprint_error_dev(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 < (int)__arraycount(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 int
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 < __arraycount(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);

        return 0;
}

static int
rt2860_txrx_enable(struct rt2860_softc *sc)
{
        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) {
                aprint_error_dev(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 (sc->sc_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 (sc->sc_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 int
rt2860_init(struct ifnet *ifp)
{
        struct rt2860_softc *sc = ifp->if_softc;
        struct ieee80211com *ic = &sc->sc_ic;
        uint32_t tmp;
        uint8_t bbp1, bbp3;
        int i, qid, ridx, ntries, error;

        /* for CardBus, power on the socket */
        if (!(sc->sc_flags & RT2860_ENABLED)) {
                if (sc->sc_enable != NULL && (*sc->sc_enable)(sc) != 0) {
                        aprint_error_dev(sc->sc_dev,
                            "could not enable device\n");
                        return EIO;
                }
                sc->sc_flags |= RT2860_ENABLED;
        }

        if (sc->rfswitch) {
                /* hardware has a radio switch on GPIO pin 2 */
                if (!(RAL_READ(sc, RT2860_GPIO_CTRL) & (1 << 2))) {
                        aprint_normal_dev(sc->sc_dev,
                            "radio is disabled by hardware switch\n");
#ifdef notyet
                        rt2860_stop(ifp, 1);
                        return EPERM;
#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) {
                aprint_error_dev(sc->sc_dev,
                    "could not load 8051 microcode\n");
                rt2860_stop(ifp, 1);
                return error;
        }

        IEEE80211_ADDR_COPY(ic->ic_myaddr, CLLADDR(ifp->if_sadl));
        rt2860_set_macaddr(sc, ic->ic_myaddr);

        /* 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) {
                aprint_error_dev(sc->sc_dev,
                    "timeout waiting for DMA engine\n");
                rt2860_stop(ifp, 1);
                return ETIMEDOUT;
        }
        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 < (int)__arraycount(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) {
                aprint_error_dev(sc->sc_dev, "timeout waiting for MAC\n");
                rt2860_stop(ifp, 1);
                return ETIMEDOUT;
        }

        /* 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(ifp, 1);
                return error;
        }

        /* 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 < MAXQS; 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) {
                aprint_error_dev(sc->sc_dev,
                    "timeout waiting for DMA engine\n");
                rt2860_stop(ifp, 1);
                return ETIMEDOUT;
        }
        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->rf_rev == RT5390_RF_5390)
                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)
                rt3090_rf_init(sc);

        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 */
        ic->ic_bss->ni_chan = ic->ic_ibss_chan;
        rt2860_switch_chan(sc, ic->ic_ibss_chan);

        /* 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 |= ic->ic_rtsthreshold << 8;
        RAL_WRITE(sc, RT2860_TX_RTS_CFG, tmp);

        /* setup initial protection mode */
        sc->sc_ic_flags = ic->ic_flags;
        rt2860_updateprot(ic);

        /* 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(ifp, 1);
                return error;
        }

        /* 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);

        ifp->if_flags |= IFF_RUNNING;
        ifp->if_flags &= ~IFF_OACTIVE;

        if (ic->ic_opmode != IEEE80211_M_MONITOR)
                ieee80211_new_state(ic, IEEE80211_S_SCAN, -1);
        else
                ieee80211_new_state(ic, IEEE80211_S_RUN, -1);

        return 0;
}

static void
rt2860_stop(struct ifnet *ifp, int disable)
{
        struct rt2860_softc *sc = ifp->if_softc;
        struct ieee80211com *ic = &sc->sc_ic;
        uint32_t tmp;
        int qid;

        if (ifp->if_flags & IFF_RUNNING)
                rt2860_set_leds(sc, 0); /* turn all LEDs off */

        sc->sc_tx_timer = 0;
        ifp->if_timer = 0;
        ifp->if_flags &= ~IFF_RUNNING;
        ifp->if_flags &= ~IFF_OACTIVE;

        ieee80211_new_state(ic, IEEE80211_S_INIT, -1);  /* free all nodes */

        /* 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 < MAXQS; qid++)
                rt2860_reset_tx_ring(sc, &sc->txq[qid]);
        rt2860_reset_rx_ring(sc, &sc->rxq);

        /* for CardBus, power down the socket */
        if (disable && sc->sc_disable != NULL) {
                if (sc->sc_flags & RT2860_ENABLED) {
                        (*sc->sc_disable)(sc);
                        sc->sc_flags &= ~RT2860_ENABLED;
                }
        }
}

static int
rt2860_load_microcode(struct rt2860_softc *sc)
{
        int ntries;

        /* 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, sc->ucode, sc->ucsize);
        /* 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) {
                aprint_error_dev(sc->sc_dev,
                    "timeout waiting for MCU to initialize\n");
                return ETIMEDOUT;
        }
        return 0;
}

#if 0
/*
 * This function is called periodically to adjust Tx power based on
 * temperature variation.
 */
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 /* 0 */

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);
        DPRINTF(("switch channel %u\n", chan));
        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);
}

#ifndef IEEE80211_STA_ONLY
static int
rt2860_setup_beacon(struct rt2860_softc *sc)
{
        struct ieee80211com *ic = &sc->sc_ic;
        struct rt2860_txwi txwi;
        struct mbuf *m;
        int ridx;

        if ((m = ieee80211_beacon_alloc(ic, ic->ic_bss, &sc->sc_bo)) == 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 = (ic->ic_curmode == IEEE80211_MODE_11A) ?
            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;
}
#endif

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

        tmp = RAL_READ(sc, RT2860_BCN_TIME_CFG);

        tmp &= ~0x1fffff;
        tmp |= ic->ic_bss->ni_intval * 16;
        tmp |= RT2860_TSF_TIMER_EN | RT2860_TBTT_TIMER_EN;
        if (ic->ic_opmode == IEEE80211_M_STA) {
                /*
                 * Local TSF is always updated with remote TSF on beacon
                 * reception.
                 */
                tmp |= 1 << RT2860_TSF_SYNC_MODE_SHIFT;
        }
#ifndef IEEE80211_STA_ONLY
        else if (ic->ic_opmode == IEEE80211_M_IBSS) {
                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 (ic->ic_opmode == IEEE80211_M_HOSTAP) {
                tmp |= RT2860_BCN_TX_EN;
                /* SYNC with nobody */
                tmp |= 3 << RT2860_TSF_SYNC_MODE_SHIFT;
        }
#endif

        RAL_WRITE(sc, RT2860_BCN_TIME_CFG, tmp);
}