/*-
 * SPDX-License-Identifier: BSD-3-Clause
 *
 * Copyright (c) 2007 The DragonFly Project.  All rights reserved.
 * 
 * This code is derived from software contributed to The DragonFly Project
 * by Sepherosa Ziehau <sepherosa@gmail.com>
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 * 3. Neither the name of The DragonFly Project nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific, prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * 
 * $DragonFly: src/sys/dev/netif/bwi/if_bwi.c,v 1.19 2008/02/15 11:15:38 sephe Exp $
 */

#include <sys/cdefs.h>
#include "opt_inet.h"
#include "opt_bwi.h"
#include "opt_wlan.h"

#include <sys/param.h>
#include <sys/endian.h>
#include <sys/kernel.h>
#include <sys/bus.h>
#include <sys/malloc.h>
#include <sys/proc.h>
#include <sys/rman.h>
#include <sys/socket.h>
#include <sys/sockio.h>
#include <sys/sysctl.h>
#include <sys/systm.h>
#include <sys/taskqueue.h>

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

#include <net80211/ieee80211_var.h>
#include <net80211/ieee80211_radiotap.h>
#include <net80211/ieee80211_regdomain.h>
#include <net80211/ieee80211_phy.h>
#include <net80211/ieee80211_ratectl.h>

#include <net/bpf.h>

#ifdef INET
#include <netinet/in.h> 
#include <netinet/if_ether.h>
#endif

#include <machine/bus.h>

#include <dev/pci/pcivar.h>
#include <dev/pci/pcireg.h>

#include <dev/bwi/bitops.h>
#include <dev/bwi/if_bwireg.h>
#include <dev/bwi/if_bwivar.h>
#include <dev/bwi/bwimac.h>
#include <dev/bwi/bwirf.h>

struct bwi_clock_freq {
        u_int           clkfreq_min;
        u_int           clkfreq_max;
};

struct bwi_myaddr_bssid {
        uint8_t         myaddr[IEEE80211_ADDR_LEN];
        uint8_t         bssid[IEEE80211_ADDR_LEN];
} __packed;

static struct ieee80211vap *bwi_vap_create(struct ieee80211com *,
                    const char [IFNAMSIZ], int, enum ieee80211_opmode, int,
                    const uint8_t [IEEE80211_ADDR_LEN],
                    const uint8_t [IEEE80211_ADDR_LEN]);
static void     bwi_vap_delete(struct ieee80211vap *);
static void     bwi_init(struct bwi_softc *);
static void     bwi_parent(struct ieee80211com *);
static int      bwi_transmit(struct ieee80211com *, struct mbuf *);
static void     bwi_start_locked(struct bwi_softc *);
static int      bwi_raw_xmit(struct ieee80211_node *, struct mbuf *,
                        const struct ieee80211_bpf_params *);
static void     bwi_watchdog(void *);
static void     bwi_scan_start(struct ieee80211com *);
static void     bwi_getradiocaps(struct ieee80211com *, int, int *,
                    struct ieee80211_channel[]);
static void     bwi_set_channel(struct ieee80211com *);
static void     bwi_scan_end(struct ieee80211com *);
static int      bwi_newstate(struct ieee80211vap *, enum ieee80211_state, int);
static void     bwi_updateslot(struct ieee80211com *);

static void     bwi_calibrate(void *);

static int      bwi_calc_rssi(struct bwi_softc *, const struct bwi_rxbuf_hdr *);
static int      bwi_calc_noise(struct bwi_softc *);
static __inline uint8_t bwi_plcp2rate(uint32_t, enum ieee80211_phytype);
static void     bwi_rx_radiotap(struct bwi_softc *, struct mbuf *,
                        struct bwi_rxbuf_hdr *, const void *, int, int, int);

static void     bwi_restart(void *, int);
static void     bwi_init_statechg(struct bwi_softc *, int);
static void     bwi_stop(struct bwi_softc *, int);
static void     bwi_stop_locked(struct bwi_softc *, int);
static int      bwi_newbuf(struct bwi_softc *, int, int);
static int      bwi_encap(struct bwi_softc *, int, struct mbuf *,
                          struct ieee80211_node *);
static int      bwi_encap_raw(struct bwi_softc *, int, struct mbuf *,
                          struct ieee80211_node *,
                          const struct ieee80211_bpf_params *);

static void     bwi_init_rxdesc_ring32(struct bwi_softc *, uint32_t,
                                       bus_addr_t, int, int);
static void     bwi_reset_rx_ring32(struct bwi_softc *, uint32_t);

static int      bwi_init_tx_ring32(struct bwi_softc *, int);
static int      bwi_init_rx_ring32(struct bwi_softc *);
static int      bwi_init_txstats32(struct bwi_softc *);
static void     bwi_free_tx_ring32(struct bwi_softc *, int);
static void     bwi_free_rx_ring32(struct bwi_softc *);
static void     bwi_free_txstats32(struct bwi_softc *);
static void     bwi_setup_rx_desc32(struct bwi_softc *, int, bus_addr_t, int);
static void     bwi_setup_tx_desc32(struct bwi_softc *, struct bwi_ring_data *,
                                    int, bus_addr_t, int);
static int      bwi_rxeof32(struct bwi_softc *);
static void     bwi_start_tx32(struct bwi_softc *, uint32_t, int);
static void     bwi_txeof_status32(struct bwi_softc *);

static int      bwi_init_tx_ring64(struct bwi_softc *, int);
static int      bwi_init_rx_ring64(struct bwi_softc *);
static int      bwi_init_txstats64(struct bwi_softc *);
static void     bwi_free_tx_ring64(struct bwi_softc *, int);
static void     bwi_free_rx_ring64(struct bwi_softc *);
static void     bwi_free_txstats64(struct bwi_softc *);
static void     bwi_setup_rx_desc64(struct bwi_softc *, int, bus_addr_t, int);
static void     bwi_setup_tx_desc64(struct bwi_softc *, struct bwi_ring_data *,
                                    int, bus_addr_t, int);
static int      bwi_rxeof64(struct bwi_softc *);
static void     bwi_start_tx64(struct bwi_softc *, uint32_t, int);
static void     bwi_txeof_status64(struct bwi_softc *);

static int      bwi_rxeof(struct bwi_softc *, int);
static void     _bwi_txeof(struct bwi_softc *, uint16_t, int, int);
static void     bwi_txeof(struct bwi_softc *);
static void     bwi_txeof_status(struct bwi_softc *, int);
static void     bwi_enable_intrs(struct bwi_softc *, uint32_t);
static void     bwi_disable_intrs(struct bwi_softc *, uint32_t);

static int      bwi_dma_alloc(struct bwi_softc *);
static void     bwi_dma_free(struct bwi_softc *);
static int      bwi_dma_ring_alloc(struct bwi_softc *, bus_dma_tag_t,
                                   struct bwi_ring_data *, bus_size_t,
                                   uint32_t);
static int      bwi_dma_mbuf_create(struct bwi_softc *);
static void     bwi_dma_mbuf_destroy(struct bwi_softc *, int, int);
static int      bwi_dma_txstats_alloc(struct bwi_softc *, uint32_t, bus_size_t);
static void     bwi_dma_txstats_free(struct bwi_softc *);
static void     bwi_dma_ring_addr(void *, bus_dma_segment_t *, int, int);
static void     bwi_dma_buf_addr(void *, bus_dma_segment_t *, int,
                                 bus_size_t, int);

static void     bwi_power_on(struct bwi_softc *, int);
static int      bwi_power_off(struct bwi_softc *, int);
static int      bwi_set_clock_mode(struct bwi_softc *, enum bwi_clock_mode);
static int      bwi_set_clock_delay(struct bwi_softc *);
static void     bwi_get_clock_freq(struct bwi_softc *, struct bwi_clock_freq *);
static int      bwi_get_pwron_delay(struct bwi_softc *sc);
static void     bwi_set_addr_filter(struct bwi_softc *, uint16_t,
                                    const uint8_t *);
static void     bwi_set_bssid(struct bwi_softc *, const uint8_t *);

static void     bwi_get_card_flags(struct bwi_softc *);
static void     bwi_get_eaddr(struct bwi_softc *, uint16_t, uint8_t *);

static int      bwi_bus_attach(struct bwi_softc *);
static int      bwi_bbp_attach(struct bwi_softc *);
static int      bwi_bbp_power_on(struct bwi_softc *, enum bwi_clock_mode);
static void     bwi_bbp_power_off(struct bwi_softc *);

static const char *bwi_regwin_name(const struct bwi_regwin *);
static uint32_t bwi_regwin_disable_bits(struct bwi_softc *);
static void     bwi_regwin_info(struct bwi_softc *, uint16_t *, uint8_t *);
static int      bwi_regwin_select(struct bwi_softc *, int);

static void     bwi_led_attach(struct bwi_softc *);
static void     bwi_led_newstate(struct bwi_softc *, enum ieee80211_state);
static void     bwi_led_event(struct bwi_softc *, int);
static void     bwi_led_blink_start(struct bwi_softc *, int, int);
static void     bwi_led_blink_next(void *);
static void     bwi_led_blink_end(void *);

static const struct {
        uint16_t        did_min;
        uint16_t        did_max;
        uint16_t        bbp_id;
} bwi_bbpid_map[] = {
        { 0x4301, 0x4301, 0x4301 },
        { 0x4305, 0x4307, 0x4307 },
        { 0x4402, 0x4403, 0x4402 },
        { 0x4610, 0x4615, 0x4610 },
        { 0x4710, 0x4715, 0x4710 },
        { 0x4720, 0x4725, 0x4309 }
};

static const struct {
        uint16_t        bbp_id;
        int             nregwin;
} bwi_regwin_count[] = {
        { 0x4301, 5 },
        { 0x4306, 6 },
        { 0x4307, 5 },
        { 0x4310, 8 },
        { 0x4401, 3 },
        { 0x4402, 3 },
        { 0x4610, 9 },
        { 0x4704, 9 },
        { 0x4710, 9 },
        { 0x5365, 7 }
};

#define CLKSRC(src)                             \
[BWI_CLKSRC_ ## src] = {                        \
        .freq_min = BWI_CLKSRC_ ##src## _FMIN,  \
        .freq_max = BWI_CLKSRC_ ##src## _FMAX   \
}

static const struct {
        u_int   freq_min;
        u_int   freq_max;
} bwi_clkfreq[BWI_CLKSRC_MAX] = {
        CLKSRC(LP_OSC),
        CLKSRC(CS_OSC),
        CLKSRC(PCI)
};

#undef CLKSRC

#define VENDOR_LED_ACT(vendor)                          \
{                                                       \
        .vid = PCI_VENDOR_##vendor,                     \
        .led_act = { BWI_VENDOR_LED_ACT_##vendor }      \
}

static const struct {
#define PCI_VENDOR_COMPAQ       0x0e11
#define PCI_VENDOR_LINKSYS      0x1737
        uint16_t        vid;
        uint8_t         led_act[BWI_LED_MAX];
} bwi_vendor_led_act[] = {
        VENDOR_LED_ACT(COMPAQ),
        VENDOR_LED_ACT(LINKSYS)
#undef PCI_VENDOR_LINKSYS
#undef PCI_VENDOR_COMPAQ
};

static const uint8_t bwi_default_led_act[BWI_LED_MAX] =
        { BWI_VENDOR_LED_ACT_DEFAULT };

#undef VENDOR_LED_ACT

static const struct {
        int     on_dur;
        int     off_dur;
} bwi_led_duration[109] = {
        [0]     = { 400, 100 },
        [2]     = { 150, 75 },
        [4]     = { 90, 45 },
        [11]    = { 66, 34 },
        [12]    = { 53, 26 },
        [18]    = { 42, 21 },
        [22]    = { 35, 17 },
        [24]    = { 32, 16 },
        [36]    = { 21, 10 },
        [48]    = { 16, 8 },
        [72]    = { 11, 5 },
        [96]    = { 9, 4 },
        [108]   = { 7, 3 }
};

#ifdef BWI_DEBUG
#ifdef BWI_DEBUG_VERBOSE
static uint32_t bwi_debug = BWI_DBG_ATTACH | BWI_DBG_INIT | BWI_DBG_TXPOWER;
#else
static uint32_t bwi_debug;
#endif
TUNABLE_INT("hw.bwi.debug", (int *)&bwi_debug);
#endif  /* BWI_DEBUG */

static const uint8_t bwi_zero_addr[IEEE80211_ADDR_LEN];

uint16_t
bwi_read_sprom(struct bwi_softc *sc, uint16_t ofs)
{
        return CSR_READ_2(sc, ofs + BWI_SPROM_START);
}

static __inline void
bwi_setup_desc32(struct bwi_softc *sc, struct bwi_desc32 *desc_array,
                 int ndesc, int desc_idx, bus_addr_t paddr, int buf_len,
                 int tx)
{
        struct bwi_desc32 *desc = &desc_array[desc_idx];
        uint32_t ctrl, addr, addr_hi, addr_lo;

        addr_lo = __SHIFTOUT(paddr, BWI_DESC32_A_ADDR_MASK);
        addr_hi = __SHIFTOUT(paddr, BWI_DESC32_A_FUNC_MASK);

        addr = __SHIFTIN(addr_lo, BWI_DESC32_A_ADDR_MASK) |
               __SHIFTIN(BWI_DESC32_A_FUNC_TXRX, BWI_DESC32_A_FUNC_MASK);

        ctrl = __SHIFTIN(buf_len, BWI_DESC32_C_BUFLEN_MASK) |
               __SHIFTIN(addr_hi, BWI_DESC32_C_ADDRHI_MASK);
        if (desc_idx == ndesc - 1)
                ctrl |= BWI_DESC32_C_EOR;
        if (tx) {
                /* XXX */
                ctrl |= BWI_DESC32_C_FRAME_START |
                        BWI_DESC32_C_FRAME_END |
                        BWI_DESC32_C_INTR;
        }

        desc->addr = htole32(addr);
        desc->ctrl = htole32(ctrl);
}

int
bwi_attach(struct bwi_softc *sc)
{
        struct ieee80211com *ic = &sc->sc_ic;
        device_t dev = sc->sc_dev;
        struct bwi_mac *mac;
        struct bwi_phy *phy;
        int i, error;

        BWI_LOCK_INIT(sc);

        /*
         * Initialize taskq and various tasks
         */
        sc->sc_tq = taskqueue_create("bwi_taskq", M_NOWAIT | M_ZERO,
                taskqueue_thread_enqueue, &sc->sc_tq);
        taskqueue_start_threads(&sc->sc_tq, 1, PI_NET, "%s taskq",
                device_get_nameunit(dev));
        TASK_INIT(&sc->sc_restart_task, 0, bwi_restart, sc);
        callout_init_mtx(&sc->sc_calib_ch, &sc->sc_mtx, 0);
        mbufq_init(&sc->sc_snd, ifqmaxlen);

        /*
         * Initialize sysctl variables
         */
        sc->sc_fw_version = BWI_FW_VERSION3;
        sc->sc_led_idle = (2350 * hz) / 1000;
        sc->sc_led_ticks = ticks - sc->sc_led_idle;
        sc->sc_led_blink = 1;
        sc->sc_txpwr_calib = 1;
#ifdef BWI_DEBUG
        sc->sc_debug = bwi_debug;
#endif
        bwi_power_on(sc, 1);

        error = bwi_bbp_attach(sc);
        if (error)
                goto fail;

        error = bwi_bbp_power_on(sc, BWI_CLOCK_MODE_FAST);
        if (error)
                goto fail;

        if (BWI_REGWIN_EXIST(&sc->sc_com_regwin)) {
                error = bwi_set_clock_delay(sc);
                if (error)
                        goto fail;

                error = bwi_set_clock_mode(sc, BWI_CLOCK_MODE_FAST);
                if (error)
                        goto fail;

                error = bwi_get_pwron_delay(sc);
                if (error)
                        goto fail;
        }

        error = bwi_bus_attach(sc);
        if (error)
                goto fail;

        bwi_get_card_flags(sc);

        bwi_led_attach(sc);

        for (i = 0; i < sc->sc_nmac; ++i) {
                struct bwi_regwin *old;

                mac = &sc->sc_mac[i];
                error = bwi_regwin_switch(sc, &mac->mac_regwin, &old);
                if (error)
                        goto fail;

                error = bwi_mac_lateattach(mac);
                if (error)
                        goto fail;

                error = bwi_regwin_switch(sc, old, NULL);
                if (error)
                        goto fail;
        }

        /*
         * XXX First MAC is known to exist
         * TODO2
         */
        mac = &sc->sc_mac[0];
        phy = &mac->mac_phy;

        bwi_bbp_power_off(sc);

        error = bwi_dma_alloc(sc);
        if (error)
                goto fail;

        error = bwi_mac_fw_alloc(mac);
        if (error)
                goto fail;

        callout_init_mtx(&sc->sc_watchdog_timer, &sc->sc_mtx, 0);

        /*
         * Setup ratesets, phytype, channels and get MAC address
         */
        if (phy->phy_mode == IEEE80211_MODE_11B ||
            phy->phy_mode == IEEE80211_MODE_11G) {
                if (phy->phy_mode == IEEE80211_MODE_11B) {
                        ic->ic_phytype = IEEE80211_T_DS;
                } else {
                        ic->ic_phytype = IEEE80211_T_OFDM;
                }

                bwi_get_eaddr(sc, BWI_SPROM_11BG_EADDR, ic->ic_macaddr);
                if (IEEE80211_IS_MULTICAST(ic->ic_macaddr)) {
                        bwi_get_eaddr(sc, BWI_SPROM_11A_EADDR, ic->ic_macaddr);
                        if (IEEE80211_IS_MULTICAST(ic->ic_macaddr)) {
                                device_printf(dev,
                                    "invalid MAC address: %6D\n",
                                    ic->ic_macaddr, ":");
                        }
                }
        } else if (phy->phy_mode == IEEE80211_MODE_11A) {
                /* TODO:11A */
                error = ENXIO;
                goto fail;
        } else {
                panic("unknown phymode %d\n", phy->phy_mode);
        }

        /* Get locale */
        sc->sc_locale = __SHIFTOUT(bwi_read_sprom(sc, BWI_SPROM_CARD_INFO),
                                   BWI_SPROM_CARD_INFO_LOCALE);
        DPRINTF(sc, BWI_DBG_ATTACH, "locale: %d\n", sc->sc_locale);
        /* XXX use locale */

        ic->ic_softc = sc;

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

        ic->ic_name = device_get_nameunit(dev);
        ic->ic_caps = IEEE80211_C_STA |
                      IEEE80211_C_SHSLOT |
                      IEEE80211_C_SHPREAMBLE |
                      IEEE80211_C_WPA |
                      IEEE80211_C_BGSCAN |
                      IEEE80211_C_MONITOR;
        ic->ic_opmode = IEEE80211_M_STA;
        ieee80211_ifattach(ic);

        ic->ic_headroom = sizeof(struct bwi_txbuf_hdr);

        /* override default methods */
        ic->ic_vap_create = bwi_vap_create;
        ic->ic_vap_delete = bwi_vap_delete;
        ic->ic_raw_xmit = bwi_raw_xmit;
        ic->ic_updateslot = bwi_updateslot;
        ic->ic_scan_start = bwi_scan_start;
        ic->ic_scan_end = bwi_scan_end;
        ic->ic_getradiocaps = bwi_getradiocaps;
        ic->ic_set_channel = bwi_set_channel;
        ic->ic_transmit = bwi_transmit;
        ic->ic_parent = bwi_parent;

        sc->sc_rates = ieee80211_get_ratetable(ic->ic_curchan);

        ieee80211_radiotap_attach(ic,
            &sc->sc_tx_th.wt_ihdr, sizeof(sc->sc_tx_th),
                BWI_TX_RADIOTAP_PRESENT,
            &sc->sc_rx_th.wr_ihdr, sizeof(sc->sc_rx_th),
                BWI_RX_RADIOTAP_PRESENT);

        /*
         * Add sysctl nodes
         */
        SYSCTL_ADD_INT(device_get_sysctl_ctx(dev),
                        SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO,
                        "fw_version", CTLFLAG_RD, &sc->sc_fw_version, 0,
                        "Firmware version");
        SYSCTL_ADD_INT(device_get_sysctl_ctx(dev),
                        SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO,
                        "led_idle", CTLFLAG_RW, &sc->sc_led_idle, 0,
                        "# ticks before LED enters idle state");
        SYSCTL_ADD_INT(device_get_sysctl_ctx(dev),
                       SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO,
                       "led_blink", CTLFLAG_RW, &sc->sc_led_blink, 0,
                       "Allow LED to blink");
        SYSCTL_ADD_INT(device_get_sysctl_ctx(dev),
                       SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO,
                       "txpwr_calib", CTLFLAG_RW, &sc->sc_txpwr_calib, 0,
                       "Enable software TX power calibration");
#ifdef BWI_DEBUG
        SYSCTL_ADD_UINT(device_get_sysctl_ctx(dev),
                        SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO,
                        "debug", CTLFLAG_RW, &sc->sc_debug, 0, "Debug flags");
#endif
        if (bootverbose)
                ieee80211_announce(ic);

        return (0);
fail:
        BWI_LOCK_DESTROY(sc);
        return (error);
}

int
bwi_detach(struct bwi_softc *sc)
{
        struct ieee80211com *ic = &sc->sc_ic;
        int i;

        bwi_stop(sc, 1);
        callout_drain(&sc->sc_led_blink_ch);
        callout_drain(&sc->sc_calib_ch);
        callout_drain(&sc->sc_watchdog_timer);
        ieee80211_ifdetach(ic);

        for (i = 0; i < sc->sc_nmac; ++i)
                bwi_mac_detach(&sc->sc_mac[i]);
        bwi_dma_free(sc);
        taskqueue_free(sc->sc_tq);
        mbufq_drain(&sc->sc_snd);

        BWI_LOCK_DESTROY(sc);

        return (0);
}

static struct ieee80211vap *
bwi_vap_create(struct ieee80211com *ic, const char name[IFNAMSIZ], int unit,
    enum ieee80211_opmode opmode, int flags,
    const uint8_t bssid[IEEE80211_ADDR_LEN],
    const uint8_t mac[IEEE80211_ADDR_LEN])
{
        struct bwi_vap *bvp;
        struct ieee80211vap *vap;

        if (!TAILQ_EMPTY(&ic->ic_vaps))         /* only one at a time */
                return NULL;
        bvp = malloc(sizeof(struct bwi_vap), M_80211_VAP, M_WAITOK | M_ZERO);
        vap = &bvp->bv_vap;
        /* enable s/w bmiss handling for sta mode */
        ieee80211_vap_setup(ic, vap, name, unit, opmode,
            flags | IEEE80211_CLONE_NOBEACONS, bssid);

        /* override default methods */
        bvp->bv_newstate = vap->iv_newstate;
        vap->iv_newstate = bwi_newstate;
#if 0
        vap->iv_update_beacon = bwi_beacon_update;
#endif
        ieee80211_ratectl_init(vap);

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

static void
bwi_vap_delete(struct ieee80211vap *vap)
{
        struct bwi_vap *bvp = BWI_VAP(vap);

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

void
bwi_suspend(struct bwi_softc *sc)
{
        bwi_stop(sc, 1);
}

void
bwi_resume(struct bwi_softc *sc)
{

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

int
bwi_shutdown(struct bwi_softc *sc)
{
        bwi_stop(sc, 1);
        return 0;
}

static void
bwi_power_on(struct bwi_softc *sc, int with_pll)
{
        uint32_t gpio_in, gpio_out, gpio_en;
        uint16_t status;

        gpio_in = pci_read_config(sc->sc_dev, BWI_PCIR_GPIO_IN, 4);
        if (gpio_in & BWI_PCIM_GPIO_PWR_ON)
                goto back;

        gpio_out = pci_read_config(sc->sc_dev, BWI_PCIR_GPIO_OUT, 4);
        gpio_en = pci_read_config(sc->sc_dev, BWI_PCIR_GPIO_ENABLE, 4);

        gpio_out |= BWI_PCIM_GPIO_PWR_ON;
        gpio_en |= BWI_PCIM_GPIO_PWR_ON;
        if (with_pll) {
                /* Turn off PLL first */
                gpio_out |= BWI_PCIM_GPIO_PLL_PWR_OFF;
                gpio_en |= BWI_PCIM_GPIO_PLL_PWR_OFF;
        }

        pci_write_config(sc->sc_dev, BWI_PCIR_GPIO_OUT, gpio_out, 4);
        pci_write_config(sc->sc_dev, BWI_PCIR_GPIO_ENABLE, gpio_en, 4);
        DELAY(1000);

        if (with_pll) {
                /* Turn on PLL */
                gpio_out &= ~BWI_PCIM_GPIO_PLL_PWR_OFF;
                pci_write_config(sc->sc_dev, BWI_PCIR_GPIO_OUT, gpio_out, 4);
                DELAY(5000);
        }

back:
        /* Clear "Signaled Target Abort" */
        status = pci_read_config(sc->sc_dev, PCIR_STATUS, 2);
        status &= ~PCIM_STATUS_STABORT;
        pci_write_config(sc->sc_dev, PCIR_STATUS, status, 2);
}

static int
bwi_power_off(struct bwi_softc *sc, int with_pll)
{
        uint32_t gpio_out, gpio_en;

        pci_read_config(sc->sc_dev, BWI_PCIR_GPIO_IN, 4); /* dummy read */
        gpio_out = pci_read_config(sc->sc_dev, BWI_PCIR_GPIO_OUT, 4);
        gpio_en = pci_read_config(sc->sc_dev, BWI_PCIR_GPIO_ENABLE, 4);

        gpio_out &= ~BWI_PCIM_GPIO_PWR_ON;
        gpio_en |= BWI_PCIM_GPIO_PWR_ON;
        if (with_pll) {
                gpio_out |= BWI_PCIM_GPIO_PLL_PWR_OFF;
                gpio_en |= BWI_PCIM_GPIO_PLL_PWR_OFF;
        }

        pci_write_config(sc->sc_dev, BWI_PCIR_GPIO_OUT, gpio_out, 4);
        pci_write_config(sc->sc_dev, BWI_PCIR_GPIO_ENABLE, gpio_en, 4);
        return 0;
}

int
bwi_regwin_switch(struct bwi_softc *sc, struct bwi_regwin *rw,
                  struct bwi_regwin **old_rw)
{
        int error;

        if (old_rw != NULL)
                *old_rw = NULL;

        if (!BWI_REGWIN_EXIST(rw))
                return EINVAL;

        if (sc->sc_cur_regwin != rw) {
                error = bwi_regwin_select(sc, rw->rw_id);
                if (error) {
                        device_printf(sc->sc_dev, "can't select regwin %d\n",
                                  rw->rw_id);
                        return error;
                }
        }

        if (old_rw != NULL)
                *old_rw = sc->sc_cur_regwin;
        sc->sc_cur_regwin = rw;
        return 0;
}

static int
bwi_regwin_select(struct bwi_softc *sc, int id)
{
        uint32_t win = BWI_PCIM_REGWIN(id);
        int i;

#define RETRY_MAX       50
        for (i = 0; i < RETRY_MAX; ++i) {
                pci_write_config(sc->sc_dev, BWI_PCIR_SEL_REGWIN, win, 4);
                if (pci_read_config(sc->sc_dev, BWI_PCIR_SEL_REGWIN, 4) == win)
                        return 0;
                DELAY(10);
        }
#undef RETRY_MAX

        return ENXIO;
}

static void
bwi_regwin_info(struct bwi_softc *sc, uint16_t *type, uint8_t *rev)
{
        uint32_t val;

        val = CSR_READ_4(sc, BWI_ID_HI);
        *type = BWI_ID_HI_REGWIN_TYPE(val);
        *rev = BWI_ID_HI_REGWIN_REV(val);

        DPRINTF(sc, BWI_DBG_ATTACH, "regwin: type 0x%03x, rev %d, "
                "vendor 0x%04x\n", *type, *rev,
                __SHIFTOUT(val, BWI_ID_HI_REGWIN_VENDOR_MASK));
}

static int
bwi_bbp_attach(struct bwi_softc *sc)
{
        uint16_t bbp_id, rw_type;
        uint8_t rw_rev;
        uint32_t info;
        int error, nregwin, i;

        /*
         * Get 0th regwin information
         * NOTE: 0th regwin should exist
         */
        error = bwi_regwin_select(sc, 0);
        if (error) {
                device_printf(sc->sc_dev, "can't select regwin 0\n");
                return error;
        }
        bwi_regwin_info(sc, &rw_type, &rw_rev);

        /*
         * Find out BBP id
         */
        bbp_id = 0;
        info = 0;
        if (rw_type == BWI_REGWIN_T_COM) {
                info = CSR_READ_4(sc, BWI_INFO);
                bbp_id = __SHIFTOUT(info, BWI_INFO_BBPID_MASK);

                BWI_CREATE_REGWIN(&sc->sc_com_regwin, 0, rw_type, rw_rev);

                sc->sc_cap = CSR_READ_4(sc, BWI_CAPABILITY);
        } else {
                for (i = 0; i < nitems(bwi_bbpid_map); ++i) {
                        if (sc->sc_pci_did >= bwi_bbpid_map[i].did_min &&
                            sc->sc_pci_did <= bwi_bbpid_map[i].did_max) {
                                bbp_id = bwi_bbpid_map[i].bbp_id;
                                break;
                        }
                }
                if (bbp_id == 0) {
                        device_printf(sc->sc_dev, "no BBP id for device id "
                                      "0x%04x\n", sc->sc_pci_did);
                        return ENXIO;
                }

                info = __SHIFTIN(sc->sc_pci_revid, BWI_INFO_BBPREV_MASK) |
                       __SHIFTIN(0, BWI_INFO_BBPPKG_MASK);
        }

        /*
         * Find out number of regwins
         */
        nregwin = 0;
        if (rw_type == BWI_REGWIN_T_COM && rw_rev >= 4) {
                nregwin = __SHIFTOUT(info, BWI_INFO_NREGWIN_MASK);
        } else {
                for (i = 0; i < nitems(bwi_regwin_count); ++i) {
                        if (bwi_regwin_count[i].bbp_id == bbp_id) {
                                nregwin = bwi_regwin_count[i].nregwin;
                                break;
                        }
                }
                if (nregwin == 0) {
                        device_printf(sc->sc_dev, "no number of win for "
                                      "BBP id 0x%04x\n", bbp_id);
                        return ENXIO;
                }
        }

        /* Record BBP id/rev for later using */
        sc->sc_bbp_id = bbp_id;
        sc->sc_bbp_rev = __SHIFTOUT(info, BWI_INFO_BBPREV_MASK);
        sc->sc_bbp_pkg = __SHIFTOUT(info, BWI_INFO_BBPPKG_MASK);
        device_printf(sc->sc_dev, "BBP: id 0x%04x, rev 0x%x, pkg %d\n",
                      sc->sc_bbp_id, sc->sc_bbp_rev, sc->sc_bbp_pkg);

        DPRINTF(sc, BWI_DBG_ATTACH, "nregwin %d, cap 0x%08x\n",
                nregwin, sc->sc_cap);

        /*
         * Create rest of the regwins
         */

        /* Don't re-create common regwin, if it is already created */
        i = BWI_REGWIN_EXIST(&sc->sc_com_regwin) ? 1 : 0;

        for (; i < nregwin; ++i) {
                /*
                 * Get regwin information
                 */
                error = bwi_regwin_select(sc, i);
                if (error) {
                        device_printf(sc->sc_dev,
                                      "can't select regwin %d\n", i);
                        return error;
                }
                bwi_regwin_info(sc, &rw_type, &rw_rev);

                /*
                 * Try attach:
                 * 1) Bus (PCI/PCIE) regwin
                 * 2) MAC regwin
                 * Ignore rest types of regwin
                 */
                if (rw_type == BWI_REGWIN_T_BUSPCI ||
                    rw_type == BWI_REGWIN_T_BUSPCIE) {
                        if (BWI_REGWIN_EXIST(&sc->sc_bus_regwin)) {
                                device_printf(sc->sc_dev,
                                              "bus regwin already exists\n");
                        } else {
                                BWI_CREATE_REGWIN(&sc->sc_bus_regwin, i,
                                                  rw_type, rw_rev);
                        }
                } else if (rw_type == BWI_REGWIN_T_MAC) {
                        /* XXX ignore return value */
                        bwi_mac_attach(sc, i, rw_rev);
                }
        }

        /* At least one MAC shold exist */
        if (!BWI_REGWIN_EXIST(&sc->sc_mac[0].mac_regwin)) {
                device_printf(sc->sc_dev, "no MAC was found\n");
                return ENXIO;
        }
        KASSERT(sc->sc_nmac > 0, ("no mac's"));

        /* Bus regwin must exist */
        if (!BWI_REGWIN_EXIST(&sc->sc_bus_regwin)) {
                device_printf(sc->sc_dev, "no bus regwin was found\n");
                return ENXIO;
        }

        /* Start with first MAC */
        error = bwi_regwin_switch(sc, &sc->sc_mac[0].mac_regwin, NULL);
        if (error)
                return error;

        return 0;
}

int
bwi_bus_init(struct bwi_softc *sc, struct bwi_mac *mac)
{
        struct bwi_regwin *old, *bus;
        uint32_t val;
        int error;

        bus = &sc->sc_bus_regwin;
        KASSERT(sc->sc_cur_regwin == &mac->mac_regwin, ("not cur regwin"));

        /*
         * Tell bus to generate requested interrupts
         */
        if (bus->rw_rev < 6 && bus->rw_type == BWI_REGWIN_T_BUSPCI) {
                /*
                 * NOTE: Read BWI_FLAGS from MAC regwin
                 */
                val = CSR_READ_4(sc, BWI_FLAGS);

                error = bwi_regwin_switch(sc, bus, &old);
                if (error)
                        return error;

                CSR_SETBITS_4(sc, BWI_INTRVEC, (val & BWI_FLAGS_INTR_MASK));
        } else {
                uint32_t mac_mask;

                mac_mask = 1 << mac->mac_id;

                error = bwi_regwin_switch(sc, bus, &old);
                if (error)
                        return error;

                val = pci_read_config(sc->sc_dev, BWI_PCIR_INTCTL, 4);
                val |= mac_mask << 8;
                pci_write_config(sc->sc_dev, BWI_PCIR_INTCTL, val, 4);
        }

        if (sc->sc_flags & BWI_F_BUS_INITED)
                goto back;

        if (bus->rw_type == BWI_REGWIN_T_BUSPCI) {
                /*
                 * Enable prefetch and burst
                 */
                CSR_SETBITS_4(sc, BWI_BUS_CONFIG,
                              BWI_BUS_CONFIG_PREFETCH | BWI_BUS_CONFIG_BURST);

                if (bus->rw_rev < 5) {
                        struct bwi_regwin *com = &sc->sc_com_regwin;

                        /*
                         * Configure timeouts for bus operation
                         */

                        /*
                         * Set service timeout and request timeout
                         */
                        CSR_SETBITS_4(sc, BWI_CONF_LO,
                        __SHIFTIN(BWI_CONF_LO_SERVTO, BWI_CONF_LO_SERVTO_MASK) |
                        __SHIFTIN(BWI_CONF_LO_REQTO, BWI_CONF_LO_REQTO_MASK));

                        /*
                         * If there is common regwin, we switch to that regwin
                         * and switch back to bus regwin once we have done.
                         */
                        if (BWI_REGWIN_EXIST(com)) {
                                error = bwi_regwin_switch(sc, com, NULL);
                                if (error)
                                        return error;
                        }

                        /* Let bus know what we have changed */
                        CSR_WRITE_4(sc, BWI_BUS_ADDR, BWI_BUS_ADDR_MAGIC);
                        CSR_READ_4(sc, BWI_BUS_ADDR); /* Flush */
                        CSR_WRITE_4(sc, BWI_BUS_DATA, 0);
                        CSR_READ_4(sc, BWI_BUS_DATA); /* Flush */

                        if (BWI_REGWIN_EXIST(com)) {
                                error = bwi_regwin_switch(sc, bus, NULL);
                                if (error)
                                        return error;
                        }
                } else if (bus->rw_rev >= 11) {
                        /*
                         * Enable memory read multiple
                         */
                        CSR_SETBITS_4(sc, BWI_BUS_CONFIG, BWI_BUS_CONFIG_MRM);
                }
        } else {
                /* TODO:PCIE */
        }

        sc->sc_flags |= BWI_F_BUS_INITED;
back:
        return bwi_regwin_switch(sc, old, NULL);
}

static void
bwi_get_card_flags(struct bwi_softc *sc)
{
#define PCI_VENDOR_APPLE 0x106b
#define PCI_VENDOR_DELL  0x1028
        sc->sc_card_flags = bwi_read_sprom(sc, BWI_SPROM_CARD_FLAGS);
        if (sc->sc_card_flags == 0xffff)
                sc->sc_card_flags = 0;

        if (sc->sc_pci_subvid == PCI_VENDOR_DELL &&
            sc->sc_bbp_id == BWI_BBPID_BCM4301 &&
            sc->sc_pci_revid == 0x74)
                sc->sc_card_flags |= BWI_CARD_F_BT_COEXIST;

        if (sc->sc_pci_subvid == PCI_VENDOR_APPLE &&
            sc->sc_pci_subdid == 0x4e && /* XXX */
            sc->sc_pci_revid > 0x40)
                sc->sc_card_flags |= BWI_CARD_F_PA_GPIO9;

        DPRINTF(sc, BWI_DBG_ATTACH, "card flags 0x%04x\n", sc->sc_card_flags);
#undef PCI_VENDOR_DELL
#undef PCI_VENDOR_APPLE
}

static void
bwi_get_eaddr(struct bwi_softc *sc, uint16_t eaddr_ofs, uint8_t *eaddr)
{
        int i;

        for (i = 0; i < 3; ++i) {
                *((uint16_t *)eaddr + i) =
                        htobe16(bwi_read_sprom(sc, eaddr_ofs + 2 * i));
        }
}

static void
bwi_get_clock_freq(struct bwi_softc *sc, struct bwi_clock_freq *freq)
{
        struct bwi_regwin *com;
        uint32_t val;
        u_int div;
        int src;

        bzero(freq, sizeof(*freq));
        com = &sc->sc_com_regwin;

        KASSERT(BWI_REGWIN_EXIST(com), ("regwin does not exist"));
        KASSERT(sc->sc_cur_regwin == com, ("wrong regwin"));
        KASSERT(sc->sc_cap & BWI_CAP_CLKMODE, ("wrong clock mode"));

        /*
         * Calculate clock frequency
         */
        src = -1;
        div = 0;
        if (com->rw_rev < 6) {
                val = pci_read_config(sc->sc_dev, BWI_PCIR_GPIO_OUT, 4);
                if (val & BWI_PCIM_GPIO_OUT_CLKSRC) {
                        src = BWI_CLKSRC_PCI;
                        div = 64;
                } else {
                        src = BWI_CLKSRC_CS_OSC;
                        div = 32;
                }
        } else if (com->rw_rev < 10) {
                val = CSR_READ_4(sc, BWI_CLOCK_CTRL);

                src = __SHIFTOUT(val, BWI_CLOCK_CTRL_CLKSRC);
                if (src == BWI_CLKSRC_LP_OSC) {
                        div = 1;
                } else {
                        div = (__SHIFTOUT(val, BWI_CLOCK_CTRL_FDIV) + 1) << 2;

                        /* Unknown source */
                        if (src >= BWI_CLKSRC_MAX)
                                src = BWI_CLKSRC_CS_OSC;
                }
        } else {
                val = CSR_READ_4(sc, BWI_CLOCK_INFO);

                src = BWI_CLKSRC_CS_OSC;
                div = (__SHIFTOUT(val, BWI_CLOCK_INFO_FDIV) + 1) << 2;
        }

        KASSERT(src >= 0 && src < BWI_CLKSRC_MAX, ("bad src %d", src));
        KASSERT(div != 0, ("div zero"));

        DPRINTF(sc, BWI_DBG_ATTACH, "clksrc %s\n",
                src == BWI_CLKSRC_PCI ? "PCI" :
                (src == BWI_CLKSRC_LP_OSC ? "LP_OSC" : "CS_OSC"));

        freq->clkfreq_min = bwi_clkfreq[src].freq_min / div;
        freq->clkfreq_max = bwi_clkfreq[src].freq_max / div;

        DPRINTF(sc, BWI_DBG_ATTACH, "clkfreq min %u, max %u\n",
                freq->clkfreq_min, freq->clkfreq_max);
}

static int
bwi_set_clock_mode(struct bwi_softc *sc, enum bwi_clock_mode clk_mode)
{
        struct bwi_regwin *old, *com;
        uint32_t clk_ctrl, clk_src;
        int error, pwr_off = 0;

        com = &sc->sc_com_regwin;
        if (!BWI_REGWIN_EXIST(com))
                return 0;

        if (com->rw_rev >= 10 || com->rw_rev < 6)
                return 0;

        /*
         * For common regwin whose rev is [6, 10), the chip
         * must be capable to change clock mode.
         */
        if ((sc->sc_cap & BWI_CAP_CLKMODE) == 0)
                return 0;

        error = bwi_regwin_switch(sc, com, &old);
        if (error)
                return error;

        if (clk_mode == BWI_CLOCK_MODE_FAST)
                bwi_power_on(sc, 0);    /* Don't turn on PLL */

        clk_ctrl = CSR_READ_4(sc, BWI_CLOCK_CTRL);
        clk_src = __SHIFTOUT(clk_ctrl, BWI_CLOCK_CTRL_CLKSRC);

        switch (clk_mode) {
        case BWI_CLOCK_MODE_FAST:
                clk_ctrl &= ~BWI_CLOCK_CTRL_SLOW;
                clk_ctrl |= BWI_CLOCK_CTRL_IGNPLL;
                break;
        case BWI_CLOCK_MODE_SLOW:
                clk_ctrl |= BWI_CLOCK_CTRL_SLOW;
                break;
        case BWI_CLOCK_MODE_DYN:
                clk_ctrl &= ~(BWI_CLOCK_CTRL_SLOW |
                              BWI_CLOCK_CTRL_IGNPLL |
                              BWI_CLOCK_CTRL_NODYN);
                if (clk_src != BWI_CLKSRC_CS_OSC) {
                        clk_ctrl |= BWI_CLOCK_CTRL_NODYN;
                        pwr_off = 1;
                }
                break;
        }
        CSR_WRITE_4(sc, BWI_CLOCK_CTRL, clk_ctrl);

        if (pwr_off)
                bwi_power_off(sc, 0);   /* Leave PLL as it is */

        return bwi_regwin_switch(sc, old, NULL);
}

static int
bwi_set_clock_delay(struct bwi_softc *sc)
{
        struct bwi_regwin *old, *com;
        int error;

        com = &sc->sc_com_regwin;
        if (!BWI_REGWIN_EXIST(com))
                return 0;

        error = bwi_regwin_switch(sc, com, &old);
        if (error)
                return error;

        if (sc->sc_bbp_id == BWI_BBPID_BCM4321) {
                if (sc->sc_bbp_rev == 0)
                        CSR_WRITE_4(sc, BWI_CONTROL, BWI_CONTROL_MAGIC0);
                else if (sc->sc_bbp_rev == 1)
                        CSR_WRITE_4(sc, BWI_CONTROL, BWI_CONTROL_MAGIC1);
        }

        if (sc->sc_cap & BWI_CAP_CLKMODE) {
                if (com->rw_rev >= 10) {
                        CSR_FILT_SETBITS_4(sc, BWI_CLOCK_INFO, 0xffff, 0x40000);
                } else {
                        struct bwi_clock_freq freq;

                        bwi_get_clock_freq(sc, &freq);
                        CSR_WRITE_4(sc, BWI_PLL_ON_DELAY,
                                howmany(freq.clkfreq_max * 150, 1000000));
                        CSR_WRITE_4(sc, BWI_FREQ_SEL_DELAY,
                                howmany(freq.clkfreq_max * 15, 1000000));
                }
        }

        return bwi_regwin_switch(sc, old, NULL);
}

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

        BWI_LOCK(sc);
        bwi_init_statechg(sc, 1);
        BWI_UNLOCK(sc);

        if (sc->sc_flags & BWI_F_RUNNING)
                ieee80211_start_all(ic);                /* start all vap's */
}

static void
bwi_init_statechg(struct bwi_softc *sc, int statechg)
{
        struct bwi_mac *mac;
        int error;

        BWI_ASSERT_LOCKED(sc);

        bwi_stop_locked(sc, statechg);

        bwi_bbp_power_on(sc, BWI_CLOCK_MODE_FAST);

        /* TODO: 2 MAC */

        mac = &sc->sc_mac[0];
        error = bwi_regwin_switch(sc, &mac->mac_regwin, NULL);
        if (error) {
                device_printf(sc->sc_dev, "%s: error %d on regwin switch\n",
                    __func__, error);
                goto bad;
        }
        error = bwi_mac_init(mac);
        if (error) {
                device_printf(sc->sc_dev, "%s: error %d on MAC init\n",
                    __func__, error);
                goto bad;
        }

        bwi_bbp_power_on(sc, BWI_CLOCK_MODE_DYN);

        bwi_set_bssid(sc, bwi_zero_addr);       /* Clear BSSID */
        bwi_set_addr_filter(sc, BWI_ADDR_FILTER_MYADDR, sc->sc_ic.ic_macaddr);

        bwi_mac_reset_hwkeys(mac);

        if ((mac->mac_flags & BWI_MAC_F_HAS_TXSTATS) == 0) {
                int i;

#define NRETRY  1000
                /*
                 * Drain any possible pending TX status
                 */
                for (i = 0; i < NRETRY; ++i) {
                        if ((CSR_READ_4(sc, BWI_TXSTATUS0) &
                             BWI_TXSTATUS0_VALID) == 0)
                                break;
                        CSR_READ_4(sc, BWI_TXSTATUS1);
                }
                if (i == NRETRY)
                        device_printf(sc->sc_dev,
                            "%s: can't drain TX status\n", __func__);
#undef NRETRY
        }

        if (mac->mac_phy.phy_mode == IEEE80211_MODE_11G)
                bwi_mac_updateslot(mac, 1);

        /* Start MAC */
        error = bwi_mac_start(mac);
        if (error) {
                device_printf(sc->sc_dev, "%s: error %d starting MAC\n",
                    __func__, error);
                goto bad;
        }

        /* Clear stop flag before enabling interrupt */
        sc->sc_flags &= ~BWI_F_STOP;
        sc->sc_flags |= BWI_F_RUNNING;
        callout_reset(&sc->sc_watchdog_timer, hz, bwi_watchdog, sc);

        /* Enable intrs */
        bwi_enable_intrs(sc, BWI_INIT_INTRS);
        return;
bad:
        bwi_stop_locked(sc, 1);
}

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

        BWI_LOCK(sc);
        if (ic->ic_nrunning > 0) {
                struct bwi_mac *mac;
                int promisc = -1;

                KASSERT(sc->sc_cur_regwin->rw_type == BWI_REGWIN_T_MAC,
                    ("current regwin type %d",
                    sc->sc_cur_regwin->rw_type));
                mac = (struct bwi_mac *)sc->sc_cur_regwin;

                if (ic->ic_promisc > 0 && (sc->sc_flags & BWI_F_PROMISC) == 0) {
                        promisc = 1;
                        sc->sc_flags |= BWI_F_PROMISC;
                } else if (ic->ic_promisc == 0 &&
                    (sc->sc_flags & BWI_F_PROMISC) != 0) {
                        promisc = 0;
                        sc->sc_flags &= ~BWI_F_PROMISC;
                }

                if (promisc >= 0)
                        bwi_mac_set_promisc(mac, promisc);
        }
        if (ic->ic_nrunning > 0) {
                if ((sc->sc_flags & BWI_F_RUNNING) == 0) {
                        bwi_init_statechg(sc, 1);
                        startall = 1;
                }
        } else if (sc->sc_flags & BWI_F_RUNNING)
                bwi_stop_locked(sc, 1);
        BWI_UNLOCK(sc);
        if (startall)
                ieee80211_start_all(ic);
}

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

        BWI_LOCK(sc);
        if ((sc->sc_flags & BWI_F_RUNNING) == 0) {
                BWI_UNLOCK(sc);
                return (ENXIO);
        }
        error = mbufq_enqueue(&sc->sc_snd, m);
        if (error) {
                BWI_UNLOCK(sc);
                return (error);
        }
        bwi_start_locked(sc);
        BWI_UNLOCK(sc);
        return (0);
}

static void
bwi_start_locked(struct bwi_softc *sc)
{
        struct bwi_txbuf_data *tbd = &sc->sc_tx_bdata[BWI_TX_DATA_RING];
        struct ieee80211_frame *wh;
        struct ieee80211_node *ni;
        struct mbuf *m;
        int trans, idx;

        BWI_ASSERT_LOCKED(sc);

        trans = 0;
        idx = tbd->tbd_idx;

        while (tbd->tbd_buf[idx].tb_mbuf == NULL &&
            tbd->tbd_used + BWI_TX_NSPRDESC < BWI_TX_NDESC &&
            (m = mbufq_dequeue(&sc->sc_snd)) != NULL) {
                ni = (struct ieee80211_node *) m->m_pkthdr.rcvif;
                wh = mtod(m, struct ieee80211_frame *);
                if ((wh->i_fc[1] & IEEE80211_FC1_PROTECTED) != 0 &&
                    ieee80211_crypto_encap(ni, m) == NULL) {
                        if_inc_counter(ni->ni_vap->iv_ifp,
                            IFCOUNTER_OERRORS, 1);
                        ieee80211_free_node(ni);
                        m_freem(m);
                        continue;
                }
                if (bwi_encap(sc, idx, m, ni) != 0) {
                        /* 'm' is freed in bwi_encap() if we reach here */
                        if (ni != NULL) {
                                if_inc_counter(ni->ni_vap->iv_ifp,
                                    IFCOUNTER_OERRORS, 1);
                                ieee80211_free_node(ni);
                        } else
                                counter_u64_add(sc->sc_ic.ic_oerrors, 1);
                        continue;
                }
                trans = 1;
                tbd->tbd_used++;
                idx = (idx + 1) % BWI_TX_NDESC;
        }

        tbd->tbd_idx = idx;
        if (trans)
                sc->sc_tx_timer = 5;
}

static int
bwi_raw_xmit(struct ieee80211_node *ni, struct mbuf *m,
        const struct ieee80211_bpf_params *params)
{
        struct ieee80211com *ic = ni->ni_ic;
        struct bwi_softc *sc = ic->ic_softc;
        /* XXX wme? */
        struct bwi_txbuf_data *tbd = &sc->sc_tx_bdata[BWI_TX_DATA_RING];
        int idx, error;

        if ((sc->sc_flags & BWI_F_RUNNING) == 0) {
                m_freem(m);
                return ENETDOWN;
        }

        BWI_LOCK(sc);
        idx = tbd->tbd_idx;
        KASSERT(tbd->tbd_buf[idx].tb_mbuf == NULL, ("slot %d not empty", idx));
        if (params == NULL) {
                /*
                 * Legacy path; interpret frame contents to decide
                 * precisely how to send the frame.
                 */
                error = bwi_encap(sc, idx, m, ni);
        } else {
                /*
                 * Caller supplied explicit parameters to use in
                 * sending the frame.
                 */
                error = bwi_encap_raw(sc, idx, m, ni, params);
        }
        if (error == 0) {
                tbd->tbd_used++;
                tbd->tbd_idx = (idx + 1) % BWI_TX_NDESC;
                sc->sc_tx_timer = 5;
        }
        BWI_UNLOCK(sc);
        return error;
}

static void
bwi_watchdog(void *arg)
{
        struct bwi_softc *sc;

        sc = arg;
        BWI_ASSERT_LOCKED(sc);
        if (sc->sc_tx_timer != 0 && --sc->sc_tx_timer == 0) {
                device_printf(sc->sc_dev, "watchdog timeout\n");
                counter_u64_add(sc->sc_ic.ic_oerrors, 1);
                taskqueue_enqueue(sc->sc_tq, &sc->sc_restart_task);
        }
        callout_reset(&sc->sc_watchdog_timer, hz, bwi_watchdog, sc);
}

static void
bwi_stop(struct bwi_softc *sc, int statechg)
{
        BWI_LOCK(sc);
        bwi_stop_locked(sc, statechg);
        BWI_UNLOCK(sc);
}

static void
bwi_stop_locked(struct bwi_softc *sc, int statechg)
{
        struct bwi_mac *mac;
        int i, error, pwr_off = 0;

        BWI_ASSERT_LOCKED(sc);

        callout_stop(&sc->sc_calib_ch);
        callout_stop(&sc->sc_led_blink_ch);
        sc->sc_led_blinking = 0;
        sc->sc_flags |= BWI_F_STOP;

        if (sc->sc_flags & BWI_F_RUNNING) {
                KASSERT(sc->sc_cur_regwin->rw_type == BWI_REGWIN_T_MAC,
                    ("current regwin type %d", sc->sc_cur_regwin->rw_type));
                mac = (struct bwi_mac *)sc->sc_cur_regwin;

                bwi_disable_intrs(sc, BWI_ALL_INTRS);
                CSR_READ_4(sc, BWI_MAC_INTR_MASK);
                bwi_mac_stop(mac);
        }

        for (i = 0; i < sc->sc_nmac; ++i) {
                struct bwi_regwin *old_rw;

                mac = &sc->sc_mac[i];
                if ((mac->mac_flags & BWI_MAC_F_INITED) == 0)
                        continue;

                error = bwi_regwin_switch(sc, &mac->mac_regwin, &old_rw);
                if (error)
                        continue;

                bwi_mac_shutdown(mac);
                pwr_off = 1;

                bwi_regwin_switch(sc, old_rw, NULL);
        }

        if (pwr_off)
                bwi_bbp_power_off(sc);

        sc->sc_tx_timer = 0;
        callout_stop(&sc->sc_watchdog_timer);
        sc->sc_flags &= ~BWI_F_RUNNING;
}

void
bwi_intr(void *xsc)
{
        struct bwi_softc *sc = xsc;
        struct bwi_mac *mac;
        uint32_t intr_status;
        uint32_t txrx_intr_status[BWI_TXRX_NRING];
        int i, txrx_error, tx = 0, rx_data = -1;

        BWI_LOCK(sc);

#ifndef __HAIKU__
        if ((sc->sc_flags & BWI_F_RUNNING) == 0 ||
            (sc->sc_flags & BWI_F_STOP)) {
                BWI_UNLOCK(sc);
                return;
        }
        /*
         * Get interrupt status
         */
        intr_status = CSR_READ_4(sc, BWI_MAC_INTR_STATUS);
        if (intr_status == 0xffffffff) {        /* Not for us */
                BWI_UNLOCK(sc);
                return;
        }

        DPRINTF(sc, BWI_DBG_INTR, "intr status 0x%08x\n", intr_status);

        intr_status &= CSR_READ_4(sc, BWI_MAC_INTR_MASK);
        if (intr_status == 0) {         /* Nothing is interesting */
                BWI_UNLOCK(sc);
                return;
        }
#else
        intr_status = atomic_get((int32 *)&sc->sc_intr_status);
#endif

        KASSERT(sc->sc_cur_regwin->rw_type == BWI_REGWIN_T_MAC,
            ("current regwin type %d", sc->sc_cur_regwin->rw_type));
        mac = (struct bwi_mac *)sc->sc_cur_regwin;

        txrx_error = 0;
        DPRINTF(sc, BWI_DBG_INTR, "%s\n", "TX/RX intr");
        for (i = 0; i < BWI_TXRX_NRING; ++i) {
                uint32_t mask;

                if (BWI_TXRX_IS_RX(i))
                        mask = BWI_TXRX_RX_INTRS;
                else
                        mask = BWI_TXRX_TX_INTRS;

                txrx_intr_status[i] =
                CSR_READ_4(sc, BWI_TXRX_INTR_STATUS(i)) & mask;

                _DPRINTF(sc, BWI_DBG_INTR, ", %d 0x%08x",
                         i, txrx_intr_status[i]);

                if (txrx_intr_status[i] & BWI_TXRX_INTR_ERROR) {
                        device_printf(sc->sc_dev,
                            "%s: intr fatal TX/RX (%d) error 0x%08x\n",
                            __func__, i, txrx_intr_status[i]);
                        txrx_error = 1;
                }
        }
        _DPRINTF(sc, BWI_DBG_INTR, "%s\n", "");

        /*
         * Acknowledge interrupt
         */
        CSR_WRITE_4(sc, BWI_MAC_INTR_STATUS, intr_status);

        for (i = 0; i < BWI_TXRX_NRING; ++i)
                CSR_WRITE_4(sc, BWI_TXRX_INTR_STATUS(i), txrx_intr_status[i]);

#if !defined(__HAIKU__)
        /* Disable all interrupts */
        bwi_disable_intrs(sc, BWI_ALL_INTRS);
#endif

        /*
         * http://bcm-specs.sipsolutions.net/Interrupts
         * Says for this bit (0x800):
         * "Fatal Error
         *
         * We got this one while testing things when by accident the
         * template ram wasn't set to big endian when it should have
         * been after writing the initial values. It keeps on being
         * triggered, the only way to stop it seems to shut down the
         * chip."
         *
         * Suggesting that we should never get it and if we do we're not
         * feeding TX packets into the MAC correctly if we do...  Apparently,
         * it is valid only on mac version 5 and higher, but I couldn't
         * find a reference for that...  Since I see them from time to time
         * on my card, this suggests an error in the tx path still...
         */
        if (intr_status & BWI_INTR_PHY_TXERR) {
                if (mac->mac_flags & BWI_MAC_F_PHYE_RESET) {
                        device_printf(sc->sc_dev, "%s: intr PHY TX error\n",
                            __func__);
                        taskqueue_enqueue(sc->sc_tq, &sc->sc_restart_task);
                        BWI_UNLOCK(sc);
                        return;
                }
        }

        if (txrx_error) {
                /* TODO: reset device */
        }

        if (intr_status & BWI_INTR_TBTT)
                bwi_mac_config_ps(mac);

        if (intr_status & BWI_INTR_EO_ATIM)
                device_printf(sc->sc_dev, "EO_ATIM\n");

        if (intr_status & BWI_INTR_PMQ) {
                for (;;) {
                        if ((CSR_READ_4(sc, BWI_MAC_PS_STATUS) & 0x8) == 0)
                                break;
                }
                CSR_WRITE_2(sc, BWI_MAC_PS_STATUS, 0x2);
        }

        if (intr_status & BWI_INTR_NOISE)
                device_printf(sc->sc_dev, "intr noise\n");

        if (txrx_intr_status[0] & BWI_TXRX_INTR_RX) {
                rx_data = sc->sc_rxeof(sc);
                if (sc->sc_flags & BWI_F_STOP) {
                        BWI_UNLOCK(sc);
                        return;
                }
        }

        if (txrx_intr_status[3] & BWI_TXRX_INTR_RX) {
                sc->sc_txeof_status(sc);
                tx = 1;
        }

        if (intr_status & BWI_INTR_TX_DONE) {
                bwi_txeof(sc);
                tx = 1;
        }

        /* Re-enable interrupts */
        bwi_enable_intrs(sc, BWI_INIT_INTRS);

        if (sc->sc_blink_led != NULL && sc->sc_led_blink) {
                int evt = BWI_LED_EVENT_NONE;

                if (tx && rx_data > 0) {
                        if (sc->sc_rx_rate > sc->sc_tx_rate)
                                evt = BWI_LED_EVENT_RX;
                        else
                                evt = BWI_LED_EVENT_TX;
                } else if (tx) {
                        evt = BWI_LED_EVENT_TX;
                } else if (rx_data > 0) {
                        evt = BWI_LED_EVENT_RX;
                } else if (rx_data == 0) {
                        evt = BWI_LED_EVENT_POLL;
                }

                if (evt != BWI_LED_EVENT_NONE)
                        bwi_led_event(sc, evt);
        }

        BWI_UNLOCK(sc);
}

static void
bwi_scan_start(struct ieee80211com *ic)
{
        struct bwi_softc *sc = ic->ic_softc;

        BWI_LOCK(sc);
        /* Enable MAC beacon promiscuity */
        CSR_SETBITS_4(sc, BWI_MAC_STATUS, BWI_MAC_STATUS_PASS_BCN);
        BWI_UNLOCK(sc);
}

static void
bwi_getradiocaps(struct ieee80211com *ic,
    int maxchans, int *nchans, struct ieee80211_channel chans[])
{
        struct bwi_softc *sc = ic->ic_softc;
        struct bwi_mac *mac;
        struct bwi_phy *phy;
        uint8_t bands[IEEE80211_MODE_BYTES];

        /*
         * XXX First MAC is known to exist
         * TODO2
         */
        mac = &sc->sc_mac[0];
        phy = &mac->mac_phy;

        memset(bands, 0, sizeof(bands));
        switch (phy->phy_mode) {
        case IEEE80211_MODE_11G:
                setbit(bands, IEEE80211_MODE_11G);
                /* FALLTHROUGH */
        case IEEE80211_MODE_11B:
                setbit(bands, IEEE80211_MODE_11B);
                break;
        case IEEE80211_MODE_11A:
                /* TODO:11A */
                setbit(bands, IEEE80211_MODE_11A);
                device_printf(sc->sc_dev, "no 11a support\n");
                return;
        default:
                panic("unknown phymode %d\n", phy->phy_mode);
        }

        ieee80211_add_channels_default_2ghz(chans, maxchans, nchans, bands, 0);
}

static void
bwi_set_channel(struct ieee80211com *ic)
{
        struct bwi_softc *sc = ic->ic_softc;
        struct ieee80211_channel *c = ic->ic_curchan;
        struct bwi_mac *mac;

        BWI_LOCK(sc);
        KASSERT(sc->sc_cur_regwin->rw_type == BWI_REGWIN_T_MAC,
            ("current regwin type %d", sc->sc_cur_regwin->rw_type));
        mac = (struct bwi_mac *)sc->sc_cur_regwin;
        bwi_rf_set_chan(mac, ieee80211_chan2ieee(ic, c), 0);

        sc->sc_rates = ieee80211_get_ratetable(c);
        BWI_UNLOCK(sc);
}

static void
bwi_scan_end(struct ieee80211com *ic)
{
        struct bwi_softc *sc = ic->ic_softc;

        BWI_LOCK(sc);
        CSR_CLRBITS_4(sc, BWI_MAC_STATUS, BWI_MAC_STATUS_PASS_BCN);
        BWI_UNLOCK(sc);
}

static int
bwi_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
{
        struct bwi_vap *bvp = BWI_VAP(vap);
        struct ieee80211com *ic= vap->iv_ic;
        struct bwi_softc *sc = ic->ic_softc;
        enum ieee80211_state ostate = vap->iv_state;
        struct bwi_mac *mac;
        int error;

        BWI_LOCK(sc);

        callout_stop(&sc->sc_calib_ch);

        if (nstate == IEEE80211_S_INIT)
                sc->sc_txpwrcb_type = BWI_TXPWR_INIT;

        bwi_led_newstate(sc, nstate);

        error = bvp->bv_newstate(vap, nstate, arg);
        if (error != 0)
                goto back;

        /*
         * Clear the BSSID when we stop a STA
         */
        if (vap->iv_opmode == IEEE80211_M_STA) {
                if (ostate == IEEE80211_S_RUN && nstate != IEEE80211_S_RUN) {
                        /*
                         * Clear out the BSSID.  If we reassociate to
                         * the same AP, this will reinialize things
                         * correctly...
                         */
                        if (ic->ic_opmode == IEEE80211_M_STA && 
                            !(sc->sc_flags & BWI_F_STOP))
                                bwi_set_bssid(sc, bwi_zero_addr);
                }
        }

        if (vap->iv_opmode == IEEE80211_M_MONITOR) {
                /* Nothing to do */
        } else if (nstate == IEEE80211_S_RUN) {
                bwi_set_bssid(sc, vap->iv_bss->ni_bssid);

                KASSERT(sc->sc_cur_regwin->rw_type == BWI_REGWIN_T_MAC,
                    ("current regwin type %d", sc->sc_cur_regwin->rw_type));
                mac = (struct bwi_mac *)sc->sc_cur_regwin;

                /* Initial TX power calibration */
                bwi_mac_calibrate_txpower(mac, BWI_TXPWR_INIT);
#ifdef notyet
                sc->sc_txpwrcb_type = BWI_TXPWR_FORCE;
#else
                sc->sc_txpwrcb_type = BWI_TXPWR_CALIB;
#endif

                callout_reset(&sc->sc_calib_ch, hz, bwi_calibrate, sc);
        }
back:
        BWI_UNLOCK(sc);

        return error;
}

static int
bwi_dma_alloc(struct bwi_softc *sc)
{
        int error, i, has_txstats;
        bus_addr_t lowaddr = 0;
        bus_size_t tx_ring_sz, rx_ring_sz, desc_sz = 0;
        uint32_t txrx_ctrl_step = 0;

        has_txstats = 0;
        for (i = 0; i < sc->sc_nmac; ++i) {
                if (sc->sc_mac[i].mac_flags & BWI_MAC_F_HAS_TXSTATS) {
                        has_txstats = 1;
                        break;
                }
        }

        switch (sc->sc_bus_space) {
        case BWI_BUS_SPACE_30BIT:
        case BWI_BUS_SPACE_32BIT:
                if (sc->sc_bus_space == BWI_BUS_SPACE_30BIT)
                        lowaddr = BWI_BUS_SPACE_MAXADDR;
                else
                        lowaddr = BUS_SPACE_MAXADDR_32BIT;
                desc_sz = sizeof(struct bwi_desc32);
                txrx_ctrl_step = 0x20;

                sc->sc_init_tx_ring = bwi_init_tx_ring32;
                sc->sc_free_tx_ring = bwi_free_tx_ring32;
                sc->sc_init_rx_ring = bwi_init_rx_ring32;
                sc->sc_free_rx_ring = bwi_free_rx_ring32;
                sc->sc_setup_rxdesc = bwi_setup_rx_desc32;
                sc->sc_setup_txdesc = bwi_setup_tx_desc32;
                sc->sc_rxeof = bwi_rxeof32;
                sc->sc_start_tx = bwi_start_tx32;
                if (has_txstats) {
                        sc->sc_init_txstats = bwi_init_txstats32;
                        sc->sc_free_txstats = bwi_free_txstats32;
                        sc->sc_txeof_status = bwi_txeof_status32;
                }
                break;

        case BWI_BUS_SPACE_64BIT:
                lowaddr = BUS_SPACE_MAXADDR;    /* XXX */
                desc_sz = sizeof(struct bwi_desc64);
                txrx_ctrl_step = 0x40;

                sc->sc_init_tx_ring = bwi_init_tx_ring64;
                sc->sc_free_tx_ring = bwi_free_tx_ring64;
                sc->sc_init_rx_ring = bwi_init_rx_ring64;
                sc->sc_free_rx_ring = bwi_free_rx_ring64;
                sc->sc_setup_rxdesc = bwi_setup_rx_desc64;
                sc->sc_setup_txdesc = bwi_setup_tx_desc64;
                sc->sc_rxeof = bwi_rxeof64;
                sc->sc_start_tx = bwi_start_tx64;
                if (has_txstats) {
                        sc->sc_init_txstats = bwi_init_txstats64;
                        sc->sc_free_txstats = bwi_free_txstats64;
                        sc->sc_txeof_status = bwi_txeof_status64;
                }
                break;
        }

        KASSERT(lowaddr != 0, ("lowaddr zero"));
        KASSERT(desc_sz != 0, ("desc_sz zero"));
        KASSERT(txrx_ctrl_step != 0, ("txrx_ctrl_step zero"));

        tx_ring_sz = roundup(desc_sz * BWI_TX_NDESC, BWI_RING_ALIGN);
        rx_ring_sz = roundup(desc_sz * BWI_RX_NDESC, BWI_RING_ALIGN);

        /*
         * Create top level DMA tag
         */
        error = bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), /* parent */
                               BWI_ALIGN, 0,            /* alignment, bounds */
                               lowaddr,                 /* lowaddr */
                               BUS_SPACE_MAXADDR,       /* highaddr */
                               NULL, NULL,              /* filter, filterarg */
                               BUS_SPACE_MAXSIZE,       /* maxsize */
                               BUS_SPACE_UNRESTRICTED,  /* nsegments */
                               BUS_SPACE_MAXSIZE_32BIT, /* maxsegsize */
                               0,                       /* flags */
                               NULL, NULL,              /* lockfunc, lockarg */
                               &sc->sc_parent_dtag);
        if (error) {
                device_printf(sc->sc_dev, "can't create parent DMA tag\n");
                return error;
        }

#define TXRX_CTRL(idx)  (BWI_TXRX_CTRL_BASE + (idx) * txrx_ctrl_step)

        /*
         * Create TX ring DMA stuffs
         */
        error = bus_dma_tag_create(sc->sc_parent_dtag,
                                BWI_RING_ALIGN, 0,
                                BUS_SPACE_MAXADDR,
                                BUS_SPACE_MAXADDR,
                                NULL, NULL,
                                tx_ring_sz,
                                1,
                                tx_ring_sz,
                                0,
                                NULL, NULL,
                                &sc->sc_txring_dtag);
        if (error) {
                device_printf(sc->sc_dev, "can't create TX ring DMA tag\n");
                return error;
        }

        for (i = 0; i < BWI_TX_NRING; ++i) {
                error = bwi_dma_ring_alloc(sc, sc->sc_txring_dtag,
                                           &sc->sc_tx_rdata[i], tx_ring_sz,
                                           TXRX_CTRL(i));
                if (error) {
                        device_printf(sc->sc_dev, "%dth TX ring "
                                      "DMA alloc failed\n", i);
                        return error;
                }
        }

        /*
         * Create RX ring DMA stuffs
         */
        error = bus_dma_tag_create(sc->sc_parent_dtag,
                                BWI_RING_ALIGN, 0,
                                BUS_SPACE_MAXADDR,
                                BUS_SPACE_MAXADDR,
                                NULL, NULL,
                                rx_ring_sz,
                                1,
                                rx_ring_sz,
                                0,
                                NULL, NULL,
                                &sc->sc_rxring_dtag);
        if (error) {
                device_printf(sc->sc_dev, "can't create RX ring DMA tag\n");
                return error;
        }

        error = bwi_dma_ring_alloc(sc, sc->sc_rxring_dtag, &sc->sc_rx_rdata,
                                   rx_ring_sz, TXRX_CTRL(0));
        if (error) {
                device_printf(sc->sc_dev, "RX ring DMA alloc failed\n");
                return error;
        }

        if (has_txstats) {
                error = bwi_dma_txstats_alloc(sc, TXRX_CTRL(3), desc_sz);
                if (error) {
                        device_printf(sc->sc_dev,
                                      "TX stats DMA alloc failed\n");
                        return error;
                }
        }

#undef TXRX_CTRL

        return bwi_dma_mbuf_create(sc);
}

static void
bwi_dma_free(struct bwi_softc *sc)
{
        if (sc->sc_txring_dtag != NULL) {
                int i;

                for (i = 0; i < BWI_TX_NRING; ++i) {
                        struct bwi_ring_data *rd = &sc->sc_tx_rdata[i];

                        if (rd->rdata_desc != NULL) {
                                bus_dmamap_unload(sc->sc_txring_dtag,
                                                  rd->rdata_dmap);
                                bus_dmamem_free(sc->sc_txring_dtag,
                                                rd->rdata_desc,
                                                rd->rdata_dmap);
                        }
                }
                bus_dma_tag_destroy(sc->sc_txring_dtag);
        }

        if (sc->sc_rxring_dtag != NULL) {
                struct bwi_ring_data *rd = &sc->sc_rx_rdata;

                if (rd->rdata_desc != NULL) {
                        bus_dmamap_unload(sc->sc_rxring_dtag, rd->rdata_dmap);
                        bus_dmamem_free(sc->sc_rxring_dtag, rd->rdata_desc,
                                        rd->rdata_dmap);
                }
                bus_dma_tag_destroy(sc->sc_rxring_dtag);
        }

        bwi_dma_txstats_free(sc);
        bwi_dma_mbuf_destroy(sc, BWI_TX_NRING, 1);

        if (sc->sc_parent_dtag != NULL)
                bus_dma_tag_destroy(sc->sc_parent_dtag);
}

static int
bwi_dma_ring_alloc(struct bwi_softc *sc, bus_dma_tag_t dtag,
                   struct bwi_ring_data *rd, bus_size_t size,
                   uint32_t txrx_ctrl)
{
        int error;

        error = bus_dmamem_alloc(dtag, &rd->rdata_desc,
                                 BUS_DMA_WAITOK | BUS_DMA_ZERO,
                                 &rd->rdata_dmap);
        if (error) {
                device_printf(sc->sc_dev, "can't allocate DMA mem\n");
                return error;
        }

        error = bus_dmamap_load(dtag, rd->rdata_dmap, rd->rdata_desc, size,
                                bwi_dma_ring_addr, &rd->rdata_paddr,
                                BUS_DMA_NOWAIT);
        if (error) {
                device_printf(sc->sc_dev, "can't load DMA mem\n");
                bus_dmamem_free(dtag, rd->rdata_desc, rd->rdata_dmap);
                rd->rdata_desc = NULL;
                return error;
        }

        rd->rdata_txrx_ctrl = txrx_ctrl;
        return 0;
}

static int
bwi_dma_txstats_alloc(struct bwi_softc *sc, uint32_t ctrl_base,
                      bus_size_t desc_sz)
{
        struct bwi_txstats_data *st;
        bus_size_t dma_size;
        int error;

        st = malloc(sizeof(*st), M_DEVBUF, M_NOWAIT | M_ZERO);
        if (st == NULL) {
                device_printf(sc->sc_dev, "can't allocate txstats data\n");
                return ENOMEM;
        }
        sc->sc_txstats = st;

        /*
         * Create TX stats descriptor DMA stuffs
         */
        dma_size = roundup(desc_sz * BWI_TXSTATS_NDESC, BWI_RING_ALIGN);

        error = bus_dma_tag_create(sc->sc_parent_dtag,
                                BWI_RING_ALIGN,
                                0,
                                BUS_SPACE_MAXADDR,
                                BUS_SPACE_MAXADDR,
                                NULL, NULL,
                                dma_size,
                                1,
                                dma_size,
                                0,
                                NULL, NULL,
                                &st->stats_ring_dtag);
        if (error) {
                device_printf(sc->sc_dev, "can't create txstats ring "
                              "DMA tag\n");
                return error;
        }

        error = bus_dmamem_alloc(st->stats_ring_dtag, &st->stats_ring,
                                 BUS_DMA_WAITOK | BUS_DMA_ZERO,
                                 &st->stats_ring_dmap);
        if (error) {
                device_printf(sc->sc_dev, "can't allocate txstats ring "
                              "DMA mem\n");
                bus_dma_tag_destroy(st->stats_ring_dtag);
                st->stats_ring_dtag = NULL;
                return error;
        }

        error = bus_dmamap_load(st->stats_ring_dtag, st->stats_ring_dmap,
                                st->stats_ring, dma_size,
                                bwi_dma_ring_addr, &st->stats_ring_paddr,
                                BUS_DMA_NOWAIT);
        if (error) {
                device_printf(sc->sc_dev, "can't load txstats ring DMA mem\n");
                bus_dmamem_free(st->stats_ring_dtag, st->stats_ring,
                                st->stats_ring_dmap);
                bus_dma_tag_destroy(st->stats_ring_dtag);
                st->stats_ring_dtag = NULL;
                return error;
        }

        /*
         * Create TX stats DMA stuffs
         */
        dma_size = roundup(sizeof(struct bwi_txstats) * BWI_TXSTATS_NDESC,
                           BWI_ALIGN);

        error = bus_dma_tag_create(sc->sc_parent_dtag,
                                BWI_ALIGN,
                                0,
                                BUS_SPACE_MAXADDR,
                                BUS_SPACE_MAXADDR,
                                NULL, NULL,
                                dma_size,
                                1,
                                dma_size,
                                0,
                                NULL, NULL,
                                &st->stats_dtag);
        if (error) {
                device_printf(sc->sc_dev, "can't create txstats DMA tag\n");
                return error;
        }

        error = bus_dmamem_alloc(st->stats_dtag, (void **)&st->stats,
                                 BUS_DMA_WAITOK | BUS_DMA_ZERO,
                                 &st->stats_dmap);
        if (error) {
                device_printf(sc->sc_dev, "can't allocate txstats DMA mem\n");
                bus_dma_tag_destroy(st->stats_dtag);
                st->stats_dtag = NULL;
                return error;
        }

        error = bus_dmamap_load(st->stats_dtag, st->stats_dmap, st->stats,
                                dma_size, bwi_dma_ring_addr, &st->stats_paddr,
                                BUS_DMA_NOWAIT);
        if (error) {
                device_printf(sc->sc_dev, "can't load txstats DMA mem\n");
                bus_dmamem_free(st->stats_dtag, st->stats, st->stats_dmap);
                bus_dma_tag_destroy(st->stats_dtag);
                st->stats_dtag = NULL;
                return error;
        }

        st->stats_ctrl_base = ctrl_base;
        return 0;
}

static void
bwi_dma_txstats_free(struct bwi_softc *sc)
{
        struct bwi_txstats_data *st;

        if (sc->sc_txstats == NULL)
                return;
        st = sc->sc_txstats;

        if (st->stats_ring_dtag != NULL) {
                bus_dmamap_unload(st->stats_ring_dtag, st->stats_ring_dmap);
                bus_dmamem_free(st->stats_ring_dtag, st->stats_ring,
                                st->stats_ring_dmap);
                bus_dma_tag_destroy(st->stats_ring_dtag);
        }

        if (st->stats_dtag != NULL) {
                bus_dmamap_unload(st->stats_dtag, st->stats_dmap);
                bus_dmamem_free(st->stats_dtag, st->stats, st->stats_dmap);
                bus_dma_tag_destroy(st->stats_dtag);
        }

        free(st, M_DEVBUF);
}

static void
bwi_dma_ring_addr(void *arg, bus_dma_segment_t *seg, int nseg, int error)
{
        KASSERT(nseg == 1, ("too many segments\n"));
        *((bus_addr_t *)arg) = seg->ds_addr;
}

static int
bwi_dma_mbuf_create(struct bwi_softc *sc)
{
        struct bwi_rxbuf_data *rbd = &sc->sc_rx_bdata;
        int i, j, k, ntx, error;

        /*
         * Create TX/RX mbuf DMA tag
         */
        error = bus_dma_tag_create(sc->sc_parent_dtag,
                                1,
                                0,
                                BUS_SPACE_MAXADDR,
                                BUS_SPACE_MAXADDR,
                                NULL, NULL,
                                MCLBYTES,
                                1,
                                MCLBYTES,
                                BUS_DMA_ALLOCNOW,
                                NULL, NULL,
                                &sc->sc_buf_dtag);
        if (error) {
                device_printf(sc->sc_dev, "can't create mbuf DMA tag\n");
                return error;
        }

        ntx = 0;

        /*
         * Create TX mbuf DMA map
         */
        for (i = 0; i < BWI_TX_NRING; ++i) {
                struct bwi_txbuf_data *tbd = &sc->sc_tx_bdata[i];

                for (j = 0; j < BWI_TX_NDESC; ++j) {
                        error = bus_dmamap_create(sc->sc_buf_dtag, 0,
                                                  &tbd->tbd_buf[j].tb_dmap);
                        if (error) {
                                device_printf(sc->sc_dev, "can't create "
                                              "%dth tbd, %dth DMA map\n", i, j);

                                ntx = i;
                                for (k = 0; k < j; ++k) {
                                        bus_dmamap_destroy(sc->sc_buf_dtag,
                                                tbd->tbd_buf[k].tb_dmap);
                                }
                                goto fail;
                        }
                }
        }
        ntx = BWI_TX_NRING;

        /*
         * Create RX mbuf DMA map and a spare DMA map
         */
        error = bus_dmamap_create(sc->sc_buf_dtag, 0,
                                  &rbd->rbd_tmp_dmap);
        if (error) {
                device_printf(sc->sc_dev,
                              "can't create spare RX buf DMA map\n");
                goto fail;
        }

        for (j = 0; j < BWI_RX_NDESC; ++j) {
                error = bus_dmamap_create(sc->sc_buf_dtag, 0,
                                          &rbd->rbd_buf[j].rb_dmap);
                if (error) {
                        device_printf(sc->sc_dev, "can't create %dth "
                                      "RX buf DMA map\n", j);

                        for (k = 0; k < j; ++k) {
                                bus_dmamap_destroy(sc->sc_buf_dtag,
                                        rbd->rbd_buf[j].rb_dmap);
                        }
                        bus_dmamap_destroy(sc->sc_buf_dtag,
                                           rbd->rbd_tmp_dmap);
                        goto fail;
                }
        }

        return 0;
fail:
        bwi_dma_mbuf_destroy(sc, ntx, 0);
        return error;
}

static void
bwi_dma_mbuf_destroy(struct bwi_softc *sc, int ntx, int nrx)
{
        int i, j;

        if (sc->sc_buf_dtag == NULL)
                return;

        for (i = 0; i < ntx; ++i) {
                struct bwi_txbuf_data *tbd = &sc->sc_tx_bdata[i];

                for (j = 0; j < BWI_TX_NDESC; ++j) {
                        struct bwi_txbuf *tb = &tbd->tbd_buf[j];

                        if (tb->tb_mbuf != NULL) {
                                bus_dmamap_unload(sc->sc_buf_dtag,
                                                  tb->tb_dmap);
                                m_freem(tb->tb_mbuf);
                        }
                        if (tb->tb_ni != NULL)
                                ieee80211_free_node(tb->tb_ni);
                        bus_dmamap_destroy(sc->sc_buf_dtag, tb->tb_dmap);
                }
        }

        if (nrx) {
                struct bwi_rxbuf_data *rbd = &sc->sc_rx_bdata;

                bus_dmamap_destroy(sc->sc_buf_dtag, rbd->rbd_tmp_dmap);
                for (j = 0; j < BWI_RX_NDESC; ++j) {
                        struct bwi_rxbuf *rb = &rbd->rbd_buf[j];

                        if (rb->rb_mbuf != NULL) {
                                bus_dmamap_unload(sc->sc_buf_dtag,
                                                  rb->rb_dmap);
                                m_freem(rb->rb_mbuf);
                        }
                        bus_dmamap_destroy(sc->sc_buf_dtag, rb->rb_dmap);
                }
        }

        bus_dma_tag_destroy(sc->sc_buf_dtag);
        sc->sc_buf_dtag = NULL;
}

static void
bwi_enable_intrs(struct bwi_softc *sc, uint32_t enable_intrs)
{
        CSR_SETBITS_4(sc, BWI_MAC_INTR_MASK, enable_intrs);
}

static void
bwi_disable_intrs(struct bwi_softc *sc, uint32_t disable_intrs)
{
        CSR_CLRBITS_4(sc, BWI_MAC_INTR_MASK, disable_intrs);
}

static int
bwi_init_tx_ring32(struct bwi_softc *sc, int ring_idx)
{
        struct bwi_ring_data *rd;
        struct bwi_txbuf_data *tbd;
        uint32_t val, addr_hi, addr_lo;

        KASSERT(ring_idx < BWI_TX_NRING, ("ring_idx %d", ring_idx));
        rd = &sc->sc_tx_rdata[ring_idx];
        tbd = &sc->sc_tx_bdata[ring_idx];

        tbd->tbd_idx = 0;
        tbd->tbd_used = 0;

        bzero(rd->rdata_desc, sizeof(struct bwi_desc32) * BWI_TX_NDESC);
        bus_dmamap_sync(sc->sc_txring_dtag, rd->rdata_dmap,
                        BUS_DMASYNC_PREWRITE);

        addr_lo = __SHIFTOUT(rd->rdata_paddr, BWI_TXRX32_RINGINFO_ADDR_MASK);
        addr_hi = __SHIFTOUT(rd->rdata_paddr, BWI_TXRX32_RINGINFO_FUNC_MASK);

        val = __SHIFTIN(addr_lo, BWI_TXRX32_RINGINFO_ADDR_MASK) |
              __SHIFTIN(BWI_TXRX32_RINGINFO_FUNC_TXRX,
                        BWI_TXRX32_RINGINFO_FUNC_MASK);
        CSR_WRITE_4(sc, rd->rdata_txrx_ctrl + BWI_TX32_RINGINFO, val);

        val = __SHIFTIN(addr_hi, BWI_TXRX32_CTRL_ADDRHI_MASK) |
              BWI_TXRX32_CTRL_ENABLE;
        CSR_WRITE_4(sc, rd->rdata_txrx_ctrl + BWI_TX32_CTRL, val);

        return 0;
}

static void
bwi_init_rxdesc_ring32(struct bwi_softc *sc, uint32_t ctrl_base,
                       bus_addr_t paddr, int hdr_size, int ndesc)
{
        uint32_t val, addr_hi, addr_lo;

        addr_lo = __SHIFTOUT(paddr, BWI_TXRX32_RINGINFO_ADDR_MASK);
        addr_hi = __SHIFTOUT(paddr, BWI_TXRX32_RINGINFO_FUNC_MASK);

        val = __SHIFTIN(addr_lo, BWI_TXRX32_RINGINFO_ADDR_MASK) |
              __SHIFTIN(BWI_TXRX32_RINGINFO_FUNC_TXRX,
                        BWI_TXRX32_RINGINFO_FUNC_MASK);
        CSR_WRITE_4(sc, ctrl_base + BWI_RX32_RINGINFO, val);

        val = __SHIFTIN(hdr_size, BWI_RX32_CTRL_HDRSZ_MASK) |
              __SHIFTIN(addr_hi, BWI_TXRX32_CTRL_ADDRHI_MASK) |
              BWI_TXRX32_CTRL_ENABLE;
        CSR_WRITE_4(sc, ctrl_base + BWI_RX32_CTRL, val);

        CSR_WRITE_4(sc, ctrl_base + BWI_RX32_INDEX,
                    (ndesc - 1) * sizeof(struct bwi_desc32));
}

static int
bwi_init_rx_ring32(struct bwi_softc *sc)
{
        struct bwi_ring_data *rd = &sc->sc_rx_rdata;
        int i, error;

        sc->sc_rx_bdata.rbd_idx = 0;

        for (i = 0; i < BWI_RX_NDESC; ++i) {
                error = bwi_newbuf(sc, i, 1);
                if (error) {
                        device_printf(sc->sc_dev,
                                  "can't allocate %dth RX buffer\n", i);
                        return error;
                }
        }
        bus_dmamap_sync(sc->sc_rxring_dtag, rd->rdata_dmap,
                        BUS_DMASYNC_PREWRITE);

        bwi_init_rxdesc_ring32(sc, rd->rdata_txrx_ctrl, rd->rdata_paddr,
                               sizeof(struct bwi_rxbuf_hdr), BWI_RX_NDESC);
        return 0;
}

static int
bwi_init_txstats32(struct bwi_softc *sc)
{
        struct bwi_txstats_data *st = sc->sc_txstats;
        bus_addr_t stats_paddr;
        int i;

        bzero(st->stats, BWI_TXSTATS_NDESC * sizeof(struct bwi_txstats));
        bus_dmamap_sync(st->stats_dtag, st->stats_dmap, BUS_DMASYNC_PREWRITE);

        st->stats_idx = 0;

        stats_paddr = st->stats_paddr;
        for (i = 0; i < BWI_TXSTATS_NDESC; ++i) {
                bwi_setup_desc32(sc, st->stats_ring, BWI_TXSTATS_NDESC, i,
                                 stats_paddr, sizeof(struct bwi_txstats), 0);
                stats_paddr += sizeof(struct bwi_txstats);
        }
        bus_dmamap_sync(st->stats_ring_dtag, st->stats_ring_dmap,
                        BUS_DMASYNC_PREWRITE);

        bwi_init_rxdesc_ring32(sc, st->stats_ctrl_base,
                               st->stats_ring_paddr, 0, BWI_TXSTATS_NDESC);
        return 0;
}

static void
bwi_setup_rx_desc32(struct bwi_softc *sc, int buf_idx, bus_addr_t paddr,
                    int buf_len)
{
        struct bwi_ring_data *rd = &sc->sc_rx_rdata;

        KASSERT(buf_idx < BWI_RX_NDESC, ("buf_idx %d", buf_idx));
        bwi_setup_desc32(sc, rd->rdata_desc, BWI_RX_NDESC, buf_idx,
                         paddr, buf_len, 0);
}

static void
bwi_setup_tx_desc32(struct bwi_softc *sc, struct bwi_ring_data *rd,
                    int buf_idx, bus_addr_t paddr, int buf_len)
{
        KASSERT(buf_idx < BWI_TX_NDESC, ("buf_idx %d", buf_idx));
        bwi_setup_desc32(sc, rd->rdata_desc, BWI_TX_NDESC, buf_idx,
                         paddr, buf_len, 1);
}

static int
bwi_init_tx_ring64(struct bwi_softc *sc, int ring_idx)
{
        /* TODO:64 */
        return EOPNOTSUPP;
}

static int
bwi_init_rx_ring64(struct bwi_softc *sc)
{
        /* TODO:64 */
        return EOPNOTSUPP;
}

static int
bwi_init_txstats64(struct bwi_softc *sc)
{
        /* TODO:64 */
        return EOPNOTSUPP;
}

static void
bwi_setup_rx_desc64(struct bwi_softc *sc, int buf_idx, bus_addr_t paddr,
                    int buf_len)
{
        /* TODO:64 */
}

static void
bwi_setup_tx_desc64(struct bwi_softc *sc, struct bwi_ring_data *rd,
                    int buf_idx, bus_addr_t paddr, int buf_len)
{
        /* TODO:64 */
}

static void
bwi_dma_buf_addr(void *arg, bus_dma_segment_t *seg, int nseg,
                 bus_size_t mapsz __unused, int error)
{
        if (!error) {
                KASSERT(nseg == 1, ("too many segments(%d)\n", nseg));
                *((bus_addr_t *)arg) = seg->ds_addr;
        }
}

static int
bwi_newbuf(struct bwi_softc *sc, int buf_idx, int init)
{
        struct bwi_rxbuf_data *rbd = &sc->sc_rx_bdata;
        struct bwi_rxbuf *rxbuf = &rbd->rbd_buf[buf_idx];
        struct bwi_rxbuf_hdr *hdr;
        bus_dmamap_t map;
        bus_addr_t paddr;
        struct mbuf *m;
        int error;

        KASSERT(buf_idx < BWI_RX_NDESC, ("buf_idx %d", buf_idx));

        m = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR);
        if (m == NULL) {
                error = ENOBUFS;

                /*
                 * If the NIC is up and running, we need to:
                 * - Clear RX buffer's header.
                 * - Restore RX descriptor settings.
                 */
                if (init)
                        return error;
                else
                        goto back;
        }
        m->m_len = m->m_pkthdr.len = MCLBYTES;

        /*
         * Try to load RX buf into temporary DMA map
         */
        error = bus_dmamap_load_mbuf(sc->sc_buf_dtag, rbd->rbd_tmp_dmap, m,
                                     bwi_dma_buf_addr, &paddr, BUS_DMA_NOWAIT);
        if (error) {
                m_freem(m);

                /*
                 * See the comment above
                 */
                if (init)
                        return error;
                else
                        goto back;
        }

        if (!init)
                bus_dmamap_unload(sc->sc_buf_dtag, rxbuf->rb_dmap);
        rxbuf->rb_mbuf = m;
        rxbuf->rb_paddr = paddr;

        /*
         * Swap RX buf's DMA map with the loaded temporary one
         */
        map = rxbuf->rb_dmap;
        rxbuf->rb_dmap = rbd->rbd_tmp_dmap;
        rbd->rbd_tmp_dmap = map;

back:
        /*
         * Clear RX buf header
         */
        hdr = mtod(rxbuf->rb_mbuf, struct bwi_rxbuf_hdr *);
        bzero(hdr, sizeof(*hdr));
        bus_dmamap_sync(sc->sc_buf_dtag, rxbuf->rb_dmap, BUS_DMASYNC_PREWRITE);

        /*
         * Setup RX buf descriptor
         */
        sc->sc_setup_rxdesc(sc, buf_idx, rxbuf->rb_paddr,
                            rxbuf->rb_mbuf->m_len - sizeof(*hdr));
        return error;
}

static void
bwi_set_addr_filter(struct bwi_softc *sc, uint16_t addr_ofs,
                    const uint8_t *addr)
{
        int i;

        CSR_WRITE_2(sc, BWI_ADDR_FILTER_CTRL,
                    BWI_ADDR_FILTER_CTRL_SET | addr_ofs);

        for (i = 0; i < (IEEE80211_ADDR_LEN / 2); ++i) {
                uint16_t addr_val;

                addr_val = (uint16_t)addr[i * 2] |
                           (((uint16_t)addr[(i * 2) + 1]) << 8);
                CSR_WRITE_2(sc, BWI_ADDR_FILTER_DATA, addr_val);
        }
}

static int
bwi_rxeof(struct bwi_softc *sc, int end_idx)
{
        struct bwi_ring_data *rd = &sc->sc_rx_rdata;
        struct bwi_rxbuf_data *rbd = &sc->sc_rx_bdata;
        struct ieee80211com *ic = &sc->sc_ic;
        int idx, rx_data = 0;

        idx = rbd->rbd_idx;
        while (idx != end_idx) {
                struct bwi_rxbuf *rb = &rbd->rbd_buf[idx];
                struct bwi_rxbuf_hdr *hdr;
                struct ieee80211_frame_min *wh;
                struct ieee80211_node *ni;
                struct mbuf *m;
                uint32_t plcp;
                uint16_t flags2;
                int buflen, wh_ofs, hdr_extra, rssi, noise, type, rate;

                m = rb->rb_mbuf;
                bus_dmamap_sync(sc->sc_buf_dtag, rb->rb_dmap,
                                BUS_DMASYNC_POSTREAD);

                if (bwi_newbuf(sc, idx, 0)) {
                        counter_u64_add(ic->ic_ierrors, 1);
                        goto next;
                }

                hdr = mtod(m, struct bwi_rxbuf_hdr *);
                flags2 = le16toh(hdr->rxh_flags2);

                hdr_extra = 0;
                if (flags2 & BWI_RXH_F2_TYPE2FRAME)
                        hdr_extra = 2;
                wh_ofs = hdr_extra + 6; /* XXX magic number */

                buflen = le16toh(hdr->rxh_buflen);
                if (buflen < BWI_FRAME_MIN_LEN(wh_ofs)) {
                        device_printf(sc->sc_dev,
                            "%s: zero length data, hdr_extra %d\n",
                            __func__, hdr_extra);
                        counter_u64_add(ic->ic_ierrors, 1);
                        m_freem(m);
                        goto next;
                }

                bcopy((uint8_t *)(hdr + 1) + hdr_extra, &plcp, sizeof(plcp));   
                rssi = bwi_calc_rssi(sc, hdr);
                noise = bwi_calc_noise(sc);

                m->m_len = m->m_pkthdr.len = buflen + sizeof(*hdr);
                m_adj(m, sizeof(*hdr) + wh_ofs);

                if (htole16(hdr->rxh_flags1) & BWI_RXH_F1_OFDM)
                        rate = bwi_plcp2rate(plcp, IEEE80211_T_OFDM);
                else
                        rate = bwi_plcp2rate(plcp, IEEE80211_T_CCK);

                /* RX radio tap */
                if (ieee80211_radiotap_active(ic))
                        bwi_rx_radiotap(sc, m, hdr, &plcp, rate, rssi, noise);

                m_adj(m, -IEEE80211_CRC_LEN);

                BWI_UNLOCK(sc);

                wh = mtod(m, struct ieee80211_frame_min *);
                ni = ieee80211_find_rxnode(ic, wh);
                if (ni != NULL) {
                        type = ieee80211_input(ni, m, rssi - noise, noise);
                        ieee80211_free_node(ni);
                } else
                        type = ieee80211_input_all(ic, m, rssi - noise, noise);
                if (type == IEEE80211_FC0_TYPE_DATA) {
                        rx_data = 1;
                        sc->sc_rx_rate = rate;
                }

                BWI_LOCK(sc);
next:
                idx = (idx + 1) % BWI_RX_NDESC;

                if (sc->sc_flags & BWI_F_STOP) {
                        /*
                         * Take the fast lane, don't do
                         * any damage to softc
                         */
                        return -1;
                }
        }

        rbd->rbd_idx = idx;
        bus_dmamap_sync(sc->sc_rxring_dtag, rd->rdata_dmap,
                        BUS_DMASYNC_PREWRITE);

        return rx_data;
}

static int
bwi_rxeof32(struct bwi_softc *sc)
{
        uint32_t val, rx_ctrl;
        int end_idx, rx_data;

        rx_ctrl = sc->sc_rx_rdata.rdata_txrx_ctrl;

        val = CSR_READ_4(sc, rx_ctrl + BWI_RX32_STATUS);
        end_idx = __SHIFTOUT(val, BWI_RX32_STATUS_INDEX_MASK) /
                  sizeof(struct bwi_desc32);

        rx_data = bwi_rxeof(sc, end_idx);
        if (rx_data >= 0) {
                CSR_WRITE_4(sc, rx_ctrl + BWI_RX32_INDEX,
                            end_idx * sizeof(struct bwi_desc32));
        }
        return rx_data;
}

static int
bwi_rxeof64(struct bwi_softc *sc)
{
        /* TODO:64 */
        return 0;
}

static void
bwi_reset_rx_ring32(struct bwi_softc *sc, uint32_t rx_ctrl)
{
        int i;

        CSR_WRITE_4(sc, rx_ctrl + BWI_RX32_CTRL, 0);

#define NRETRY 10

        for (i = 0; i < NRETRY; ++i) {
                uint32_t status;

                status = CSR_READ_4(sc, rx_ctrl + BWI_RX32_STATUS);
                if (__SHIFTOUT(status, BWI_RX32_STATUS_STATE_MASK) ==
                    BWI_RX32_STATUS_STATE_DISABLED)
                        break;

                DELAY(1000);
        }
        if (i == NRETRY)
                device_printf(sc->sc_dev, "reset rx ring timedout\n");

#undef NRETRY

        CSR_WRITE_4(sc, rx_ctrl + BWI_RX32_RINGINFO, 0);
}

static void
bwi_free_txstats32(struct bwi_softc *sc)
{
        bwi_reset_rx_ring32(sc, sc->sc_txstats->stats_ctrl_base);
}

static void
bwi_free_rx_ring32(struct bwi_softc *sc)
{
        struct bwi_ring_data *rd = &sc->sc_rx_rdata;
        struct bwi_rxbuf_data *rbd = &sc->sc_rx_bdata;
        int i;

        bwi_reset_rx_ring32(sc, rd->rdata_txrx_ctrl);

        for (i = 0; i < BWI_RX_NDESC; ++i) {
                struct bwi_rxbuf *rb = &rbd->rbd_buf[i];

                if (rb->rb_mbuf != NULL) {
                        bus_dmamap_unload(sc->sc_buf_dtag, rb->rb_dmap);
                        m_freem(rb->rb_mbuf);
                        rb->rb_mbuf = NULL;
                }
        }
}

static void
bwi_free_tx_ring32(struct bwi_softc *sc, int ring_idx)
{
        struct bwi_ring_data *rd;
        struct bwi_txbuf_data *tbd;
        uint32_t state, val;
        int i;

        KASSERT(ring_idx < BWI_TX_NRING, ("ring_idx %d", ring_idx));
        rd = &sc->sc_tx_rdata[ring_idx];
        tbd = &sc->sc_tx_bdata[ring_idx];

#define NRETRY 10

        for (i = 0; i < NRETRY; ++i) {
                val = CSR_READ_4(sc, rd->rdata_txrx_ctrl + BWI_TX32_STATUS);
                state = __SHIFTOUT(val, BWI_TX32_STATUS_STATE_MASK);
                if (state == BWI_TX32_STATUS_STATE_DISABLED ||
                    state == BWI_TX32_STATUS_STATE_IDLE ||
                    state == BWI_TX32_STATUS_STATE_STOPPED)
                        break;

                DELAY(1000);
        }
        if (i == NRETRY) {
                device_printf(sc->sc_dev,
                    "%s: wait for TX ring(%d) stable timed out\n",
                    __func__, ring_idx);
        }

        CSR_WRITE_4(sc, rd->rdata_txrx_ctrl + BWI_TX32_CTRL, 0);
        for (i = 0; i < NRETRY; ++i) {
                val = CSR_READ_4(sc, rd->rdata_txrx_ctrl + BWI_TX32_STATUS);
                state = __SHIFTOUT(val, BWI_TX32_STATUS_STATE_MASK);
                if (state == BWI_TX32_STATUS_STATE_DISABLED)
                        break;

                DELAY(1000);
        }
        if (i == NRETRY)
                device_printf(sc->sc_dev, "%s: reset TX ring (%d) timed out\n",
                     __func__, ring_idx);

#undef NRETRY

        DELAY(1000);

        CSR_WRITE_4(sc, rd->rdata_txrx_ctrl + BWI_TX32_RINGINFO, 0);

        for (i = 0; i < BWI_TX_NDESC; ++i) {
                struct bwi_txbuf *tb = &tbd->tbd_buf[i];

                if (tb->tb_mbuf != NULL) {
                        bus_dmamap_unload(sc->sc_buf_dtag, tb->tb_dmap);
                        m_freem(tb->tb_mbuf);
                        tb->tb_mbuf = NULL;
                }
                if (tb->tb_ni != NULL) {
                        ieee80211_free_node(tb->tb_ni);
                        tb->tb_ni = NULL;
                }
        }
}

static void
bwi_free_txstats64(struct bwi_softc *sc)
{
        /* TODO:64 */
}

static void
bwi_free_rx_ring64(struct bwi_softc *sc)
{
        /* TODO:64 */
}

static void
bwi_free_tx_ring64(struct bwi_softc *sc, int ring_idx)
{
        /* TODO:64 */
}

/* XXX does not belong here */
#define IEEE80211_OFDM_PLCP_RATE_MASK   __BITS(3, 0)
#define IEEE80211_OFDM_PLCP_LEN_MASK    __BITS(16, 5)

static __inline void
bwi_ofdm_plcp_header(uint32_t *plcp0, int pkt_len, uint8_t rate)
{
        uint32_t plcp;

        plcp = __SHIFTIN(ieee80211_rate2plcp(rate, IEEE80211_T_OFDM),
                    IEEE80211_OFDM_PLCP_RATE_MASK) |
               __SHIFTIN(pkt_len, IEEE80211_OFDM_PLCP_LEN_MASK);
        *plcp0 = htole32(plcp);
}

static __inline void
bwi_ds_plcp_header(struct ieee80211_ds_plcp_hdr *plcp, int pkt_len,
                   uint8_t rate)
{
        int len, service, pkt_bitlen;

        pkt_bitlen = pkt_len * NBBY;
        len = howmany(pkt_bitlen * 2, rate);

        service = IEEE80211_PLCP_SERVICE_LOCKED;
        if (rate == (11 * 2)) {
                int pkt_bitlen1;

                /*
                 * PLCP service field needs to be adjusted,
                 * if TX rate is 11Mbytes/s
                 */
                pkt_bitlen1 = len * 11;
                if (pkt_bitlen1 - pkt_bitlen >= NBBY)
                        service |= IEEE80211_PLCP_SERVICE_LENEXT7;
        }

        plcp->i_signal = ieee80211_rate2plcp(rate, IEEE80211_T_CCK);
        plcp->i_service = service;
        plcp->i_length = htole16(len);
        /* NOTE: do NOT touch i_crc */
}

static __inline void
bwi_plcp_header(const struct ieee80211_rate_table *rt,
        void *plcp, int pkt_len, uint8_t rate)
{
        enum ieee80211_phytype modtype;

        /*
         * Assume caller has zeroed 'plcp'
         */
        modtype = ieee80211_rate2phytype(rt, rate);
        if (modtype == IEEE80211_T_OFDM)
                bwi_ofdm_plcp_header(plcp, pkt_len, rate);
        else if (modtype == IEEE80211_T_DS)
                bwi_ds_plcp_header(plcp, pkt_len, rate);
        else
                panic("unsupport modulation type %u\n", modtype);
}

static int
bwi_encap(struct bwi_softc *sc, int idx, struct mbuf *m,
          struct ieee80211_node *ni)
{
        struct ieee80211vap *vap = ni->ni_vap;
        struct ieee80211com *ic = &sc->sc_ic;
        struct bwi_ring_data *rd = &sc->sc_tx_rdata[BWI_TX_DATA_RING];
        struct bwi_txbuf_data *tbd = &sc->sc_tx_bdata[BWI_TX_DATA_RING];
        struct bwi_txbuf *tb = &tbd->tbd_buf[idx];
        struct bwi_mac *mac;
        struct bwi_txbuf_hdr *hdr;
        struct ieee80211_frame *wh;
        const struct ieee80211_txparam *tp = ni->ni_txparms;
        uint8_t rate, rate_fb;
        uint32_t mac_ctrl;
        uint16_t phy_ctrl;
        bus_addr_t paddr;
        int type, ismcast, pkt_len, error;
#if 0
        const uint8_t *p;
        int i;
#endif

        KASSERT(sc->sc_cur_regwin->rw_type == BWI_REGWIN_T_MAC,
            ("current regwin type %d", sc->sc_cur_regwin->rw_type));
        mac = (struct bwi_mac *)sc->sc_cur_regwin;

        wh = mtod(m, struct ieee80211_frame *);
        type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK;
        ismcast = IEEE80211_IS_MULTICAST(wh->i_addr1);

        /* Get 802.11 frame len before prepending TX header */
        pkt_len = m->m_pkthdr.len + IEEE80211_CRC_LEN;

        /*
         * Find TX rate
         */
        if (type != IEEE80211_FC0_TYPE_DATA || (m->m_flags & M_EAPOL)) {
                rate = rate_fb = tp->mgmtrate;
        } else if (ismcast) {
                rate = rate_fb = tp->mcastrate;
        } else if (tp->ucastrate != IEEE80211_FIXED_RATE_NONE) {
                rate = rate_fb = tp->ucastrate;
        } else {
                ieee80211_ratectl_rate(ni, NULL, pkt_len);
                rate = ieee80211_node_get_txrate_dot11rate(ni);
                /* TODO: assign rate_fb the previous rate, if available */
                rate_fb = rate;
        }
        tb->tb_rate[0] = rate;
        tb->tb_rate[1] = rate_fb;
        sc->sc_tx_rate = rate;

        /*
         * TX radio tap
         */
        if (ieee80211_radiotap_active_vap(vap)) {
                sc->sc_tx_th.wt_flags = 0;
                if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED)
                        sc->sc_tx_th.wt_flags |= IEEE80211_RADIOTAP_F_WEP;
                if (ieee80211_rate2phytype(sc->sc_rates, rate) == IEEE80211_T_DS &&
                    (ic->ic_flags & IEEE80211_F_SHPREAMBLE) &&
                    rate != (1 * 2)) {
                        sc->sc_tx_th.wt_flags |= IEEE80211_RADIOTAP_F_SHORTPRE;
                }
                sc->sc_tx_th.wt_rate = rate;

                ieee80211_radiotap_tx(vap, m);
        }

        /*
         * Setup the embedded TX header
         */
        M_PREPEND(m, sizeof(*hdr), M_NOWAIT);
        if (m == NULL) {
                device_printf(sc->sc_dev, "%s: prepend TX header failed\n",
                    __func__);
                return ENOBUFS;
        }
        hdr = mtod(m, struct bwi_txbuf_hdr *);

        bzero(hdr, sizeof(*hdr));

        bcopy(wh->i_fc, hdr->txh_fc, sizeof(hdr->txh_fc));
        bcopy(wh->i_addr1, hdr->txh_addr1, sizeof(hdr->txh_addr1));

        if (!ismcast) {
                uint16_t dur;

                dur = ieee80211_ack_duration(sc->sc_rates, rate,
                    ic->ic_flags & ~IEEE80211_F_SHPREAMBLE);

                hdr->txh_fb_duration = htole16(dur);
        }

        hdr->txh_id = __SHIFTIN(BWI_TX_DATA_RING, BWI_TXH_ID_RING_MASK) |
                      __SHIFTIN(idx, BWI_TXH_ID_IDX_MASK);

        bwi_plcp_header(sc->sc_rates, hdr->txh_plcp, pkt_len, rate);
        bwi_plcp_header(sc->sc_rates, hdr->txh_fb_plcp, pkt_len, rate_fb);

        phy_ctrl = __SHIFTIN(mac->mac_rf.rf_ant_mode,
                             BWI_TXH_PHY_C_ANTMODE_MASK);
        if (ieee80211_rate2phytype(sc->sc_rates, rate) == IEEE80211_T_OFDM)
                phy_ctrl |= BWI_TXH_PHY_C_OFDM;
        else if ((ic->ic_flags & IEEE80211_F_SHPREAMBLE) && rate != (2 * 1))
                phy_ctrl |= BWI_TXH_PHY_C_SHPREAMBLE;

        mac_ctrl = BWI_TXH_MAC_C_HWSEQ | BWI_TXH_MAC_C_FIRST_FRAG;
        if (!ismcast)
                mac_ctrl |= BWI_TXH_MAC_C_ACK;
        if (ieee80211_rate2phytype(sc->sc_rates, rate_fb) == IEEE80211_T_OFDM)
                mac_ctrl |= BWI_TXH_MAC_C_FB_OFDM;

        hdr->txh_mac_ctrl = htole32(mac_ctrl);
        hdr->txh_phy_ctrl = htole16(phy_ctrl);

        /* Catch any further usage */
        hdr = NULL;
        wh = NULL;

        /* DMA load */
        error = bus_dmamap_load_mbuf(sc->sc_buf_dtag, tb->tb_dmap, m,
                                     bwi_dma_buf_addr, &paddr, BUS_DMA_NOWAIT);
        if (error && error != EFBIG) {
                device_printf(sc->sc_dev, "%s: can't load TX buffer (1) %d\n",
                    __func__, error);
                goto back;
        }

        if (error) {    /* error == EFBIG */
                struct mbuf *m_new;

                m_new = m_defrag(m, M_NOWAIT);
                if (m_new == NULL) {
                        device_printf(sc->sc_dev,
                            "%s: can't defrag TX buffer\n", __func__);
                        error = ENOBUFS;
                        goto back;
                } else {
                        m = m_new;
                }

                error = bus_dmamap_load_mbuf(sc->sc_buf_dtag, tb->tb_dmap, m,
                                             bwi_dma_buf_addr, &paddr,
                                             BUS_DMA_NOWAIT);
                if (error) {
                        device_printf(sc->sc_dev,
                            "%s: can't load TX buffer (2) %d\n",
                            __func__, error);
                        goto back;
                }
        }
        error = 0;

        bus_dmamap_sync(sc->sc_buf_dtag, tb->tb_dmap, BUS_DMASYNC_PREWRITE);

        tb->tb_mbuf = m;
        tb->tb_ni = ni;

#if 0
        p = mtod(m, const uint8_t *);
        for (i = 0; i < m->m_pkthdr.len; ++i) {
                if (i != 0 && i % 8 == 0)
                        printf("\n");
                printf("%02x ", p[i]);
        }
        printf("\n");
#endif
        DPRINTF(sc, BWI_DBG_TX, "idx %d, pkt_len %d, buflen %d\n",
                idx, pkt_len, m->m_pkthdr.len);

        /* Setup TX descriptor */
        sc->sc_setup_txdesc(sc, rd, idx, paddr, m->m_pkthdr.len);
        bus_dmamap_sync(sc->sc_txring_dtag, rd->rdata_dmap,
                        BUS_DMASYNC_PREWRITE);

        /* Kick start */
        sc->sc_start_tx(sc, rd->rdata_txrx_ctrl, idx);

back:
        if (error)
                m_freem(m);
        return error;
}

static int
bwi_encap_raw(struct bwi_softc *sc, int idx, struct mbuf *m,
          struct ieee80211_node *ni, const struct ieee80211_bpf_params *params)
{
        struct ieee80211vap *vap = ni->ni_vap;
        struct ieee80211com *ic = ni->ni_ic;
        struct bwi_ring_data *rd = &sc->sc_tx_rdata[BWI_TX_DATA_RING];
        struct bwi_txbuf_data *tbd = &sc->sc_tx_bdata[BWI_TX_DATA_RING];
        struct bwi_txbuf *tb = &tbd->tbd_buf[idx];
        struct bwi_mac *mac;
        struct bwi_txbuf_hdr *hdr;
        struct ieee80211_frame *wh;
        uint8_t rate, rate_fb;
        uint32_t mac_ctrl;
        uint16_t phy_ctrl;
        bus_addr_t paddr;
        int ismcast, pkt_len, error;

        KASSERT(sc->sc_cur_regwin->rw_type == BWI_REGWIN_T_MAC,
            ("current regwin type %d", sc->sc_cur_regwin->rw_type));
        mac = (struct bwi_mac *)sc->sc_cur_regwin;

        wh = mtod(m, struct ieee80211_frame *);
        ismcast = IEEE80211_IS_MULTICAST(wh->i_addr1);

        /* Get 802.11 frame len before prepending TX header */
        pkt_len = m->m_pkthdr.len + IEEE80211_CRC_LEN;

        /*
         * Find TX rate
         */
        rate = params->ibp_rate0;
        if (!ieee80211_isratevalid(ic->ic_rt, rate)) {
                /* XXX fall back to mcast/mgmt rate? */
                m_freem(m);
                return EINVAL;
        }
        if (params->ibp_try1 != 0) {
                rate_fb = params->ibp_rate1;
                if (!ieee80211_isratevalid(ic->ic_rt, rate_fb)) {
                        /* XXX fall back to rate0? */
                        m_freem(m);
                        return EINVAL;
                }
        } else
                rate_fb = rate;
        tb->tb_rate[0] = rate;
        tb->tb_rate[1] = rate_fb;
        sc->sc_tx_rate = rate;

        /*
         * TX radio tap
         */
        if (ieee80211_radiotap_active_vap(vap)) {
                sc->sc_tx_th.wt_flags = 0;
                /* XXX IEEE80211_BPF_CRYPTO */
                if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED)
                        sc->sc_tx_th.wt_flags |= IEEE80211_RADIOTAP_F_WEP;
                if (params->ibp_flags & IEEE80211_BPF_SHORTPRE)
                        sc->sc_tx_th.wt_flags |= IEEE80211_RADIOTAP_F_SHORTPRE;
                sc->sc_tx_th.wt_rate = rate;

                ieee80211_radiotap_tx(vap, m);
        }

        /*
         * Setup the embedded TX header
         */
        M_PREPEND(m, sizeof(*hdr), M_NOWAIT);
        if (m == NULL) {
                device_printf(sc->sc_dev, "%s: prepend TX header failed\n",
                    __func__);
                return ENOBUFS;
        }
        hdr = mtod(m, struct bwi_txbuf_hdr *);

        bzero(hdr, sizeof(*hdr));

        bcopy(wh->i_fc, hdr->txh_fc, sizeof(hdr->txh_fc));
        bcopy(wh->i_addr1, hdr->txh_addr1, sizeof(hdr->txh_addr1));

        mac_ctrl = BWI_TXH_MAC_C_HWSEQ | BWI_TXH_MAC_C_FIRST_FRAG;
        if (!ismcast && (params->ibp_flags & IEEE80211_BPF_NOACK) == 0) {
                uint16_t dur;

                dur = ieee80211_ack_duration(sc->sc_rates, rate_fb, 0);

                hdr->txh_fb_duration = htole16(dur);
                mac_ctrl |= BWI_TXH_MAC_C_ACK;
        }

        hdr->txh_id = __SHIFTIN(BWI_TX_DATA_RING, BWI_TXH_ID_RING_MASK) |
                      __SHIFTIN(idx, BWI_TXH_ID_IDX_MASK);

        bwi_plcp_header(sc->sc_rates, hdr->txh_plcp, pkt_len, rate);
        bwi_plcp_header(sc->sc_rates, hdr->txh_fb_plcp, pkt_len, rate_fb);

        phy_ctrl = __SHIFTIN(mac->mac_rf.rf_ant_mode,
                             BWI_TXH_PHY_C_ANTMODE_MASK);
        if (ieee80211_rate2phytype(sc->sc_rates, rate) == IEEE80211_T_OFDM) {
                phy_ctrl |= BWI_TXH_PHY_C_OFDM;
                mac_ctrl |= BWI_TXH_MAC_C_FB_OFDM;
        } else if (params->ibp_flags & IEEE80211_BPF_SHORTPRE)
                phy_ctrl |= BWI_TXH_PHY_C_SHPREAMBLE;

        hdr->txh_mac_ctrl = htole32(mac_ctrl);
        hdr->txh_phy_ctrl = htole16(phy_ctrl);

        /* Catch any further usage */
        hdr = NULL;
        wh = NULL;

        /* DMA load */
        error = bus_dmamap_load_mbuf(sc->sc_buf_dtag, tb->tb_dmap, m,
                                     bwi_dma_buf_addr, &paddr, BUS_DMA_NOWAIT);
        if (error != 0) {
                struct mbuf *m_new;

                if (error != EFBIG) {
                        device_printf(sc->sc_dev,
                            "%s: can't load TX buffer (1) %d\n",
                            __func__, error);
                        goto back;
                }
                m_new = m_defrag(m, M_NOWAIT);
                if (m_new == NULL) {
                        device_printf(sc->sc_dev,
                            "%s: can't defrag TX buffer\n", __func__);
                        error = ENOBUFS;
                        goto back;
                }
                m = m_new;
                error = bus_dmamap_load_mbuf(sc->sc_buf_dtag, tb->tb_dmap, m,
                                             bwi_dma_buf_addr, &paddr,
                                             BUS_DMA_NOWAIT);
                if (error) {
                        device_printf(sc->sc_dev,
                            "%s: can't load TX buffer (2) %d\n",
                            __func__, error);
                        goto back;
                }
        }

        bus_dmamap_sync(sc->sc_buf_dtag, tb->tb_dmap, BUS_DMASYNC_PREWRITE);

        tb->tb_mbuf = m;
        tb->tb_ni = ni;

        DPRINTF(sc, BWI_DBG_TX, "idx %d, pkt_len %d, buflen %d\n",
                idx, pkt_len, m->m_pkthdr.len);

        /* Setup TX descriptor */
        sc->sc_setup_txdesc(sc, rd, idx, paddr, m->m_pkthdr.len);
        bus_dmamap_sync(sc->sc_txring_dtag, rd->rdata_dmap,
                        BUS_DMASYNC_PREWRITE);

        /* Kick start */
        sc->sc_start_tx(sc, rd->rdata_txrx_ctrl, idx);
back:
        if (error)
                m_freem(m);
        return error;
}

static void
bwi_start_tx32(struct bwi_softc *sc, uint32_t tx_ctrl, int idx)
{
        idx = (idx + 1) % BWI_TX_NDESC;
        CSR_WRITE_4(sc, tx_ctrl + BWI_TX32_INDEX,
                    idx * sizeof(struct bwi_desc32));
}

static void
bwi_start_tx64(struct bwi_softc *sc, uint32_t tx_ctrl, int idx)
{
        /* TODO:64 */
}

static void
bwi_txeof_status32(struct bwi_softc *sc)
{
        uint32_t val, ctrl_base;
        int end_idx;

        ctrl_base = sc->sc_txstats->stats_ctrl_base;

        val = CSR_READ_4(sc, ctrl_base + BWI_RX32_STATUS);
        end_idx = __SHIFTOUT(val, BWI_RX32_STATUS_INDEX_MASK) /
                  sizeof(struct bwi_desc32);

        bwi_txeof_status(sc, end_idx);

        CSR_WRITE_4(sc, ctrl_base + BWI_RX32_INDEX,
                    end_idx * sizeof(struct bwi_desc32));

        bwi_start_locked(sc);
}

static void
bwi_txeof_status64(struct bwi_softc *sc)
{
        /* TODO:64 */
}

static void
_bwi_txeof(struct bwi_softc *sc, uint16_t tx_id, int acked, int data_txcnt)
{
        struct bwi_txbuf_data *tbd;
        struct bwi_txbuf *tb;
        int ring_idx, buf_idx;
        struct ieee80211_node *ni;

        if (tx_id == 0) {
                device_printf(sc->sc_dev, "%s: zero tx id\n", __func__);
                return;
        }

        ring_idx = __SHIFTOUT(tx_id, BWI_TXH_ID_RING_MASK);
        buf_idx = __SHIFTOUT(tx_id, BWI_TXH_ID_IDX_MASK);

        KASSERT(ring_idx == BWI_TX_DATA_RING, ("ring_idx %d", ring_idx));
        KASSERT(buf_idx < BWI_TX_NDESC, ("buf_idx %d", buf_idx));

        tbd = &sc->sc_tx_bdata[ring_idx];
        KASSERT(tbd->tbd_used > 0, ("tbd_used %d", tbd->tbd_used));
        tbd->tbd_used--;

        tb = &tbd->tbd_buf[buf_idx];
        DPRINTF(sc, BWI_DBG_TXEOF, "txeof idx %d, "
                "acked %d, data_txcnt %d, ni %p\n",
                buf_idx, acked, data_txcnt, tb->tb_ni);

        bus_dmamap_unload(sc->sc_buf_dtag, tb->tb_dmap);

        if ((ni = tb->tb_ni) != NULL) {
                const struct bwi_txbuf_hdr *hdr =
                    mtod(tb->tb_mbuf, const struct bwi_txbuf_hdr *);
                struct ieee80211_ratectl_tx_status txs;

                /* NB: update rate control only for unicast frames */
                if (hdr->txh_mac_ctrl & htole32(BWI_TXH_MAC_C_ACK)) {
                        /*
                         * Feed back 'acked and data_txcnt'.  Note that the
                         * generic AMRR code only understands one tx rate
                         * and the estimator doesn't handle real retry counts
                         * well so to avoid over-aggressive downshifting we
                         * treat any number of retries as "1".
                         */
                        txs.flags = IEEE80211_RATECTL_STATUS_LONG_RETRY;
                        txs.long_retries = acked;
                        if (data_txcnt > 1)
                                txs.status = IEEE80211_RATECTL_TX_SUCCESS;
                        else {
                                txs.status =
                                    IEEE80211_RATECTL_TX_FAIL_UNSPECIFIED;
                        }
                        ieee80211_ratectl_tx_complete(ni, &txs);
                }
                ieee80211_tx_complete(ni, tb->tb_mbuf, !acked);
                tb->tb_ni = NULL;
        } else
                m_freem(tb->tb_mbuf);
        tb->tb_mbuf = NULL;

        if (tbd->tbd_used == 0)
                sc->sc_tx_timer = 0;
}

static void
bwi_txeof_status(struct bwi_softc *sc, int end_idx)
{
        struct bwi_txstats_data *st = sc->sc_txstats;
        int idx;

        bus_dmamap_sync(st->stats_dtag, st->stats_dmap, BUS_DMASYNC_POSTREAD);

        idx = st->stats_idx;
        while (idx != end_idx) {
                const struct bwi_txstats *stats = &st->stats[idx];

                if ((stats->txs_flags & BWI_TXS_F_PENDING) == 0) {
                        int data_txcnt;

                        data_txcnt = __SHIFTOUT(stats->txs_txcnt,
                                                BWI_TXS_TXCNT_DATA);
                        _bwi_txeof(sc, le16toh(stats->txs_id),
                                   stats->txs_flags & BWI_TXS_F_ACKED,
                                   data_txcnt);
                }
                idx = (idx + 1) % BWI_TXSTATS_NDESC;
        }
        st->stats_idx = idx;
}

static void
bwi_txeof(struct bwi_softc *sc)
{

        for (;;) {
                uint32_t tx_status0, tx_status1 __unused;
                uint16_t tx_id;
                int data_txcnt;

                tx_status0 = CSR_READ_4(sc, BWI_TXSTATUS0);
                if ((tx_status0 & BWI_TXSTATUS0_VALID) == 0)
                        break;
                tx_status1 = CSR_READ_4(sc, BWI_TXSTATUS1);

                tx_id = __SHIFTOUT(tx_status0, BWI_TXSTATUS0_TXID_MASK);
                data_txcnt = __SHIFTOUT(tx_status0,
                                BWI_TXSTATUS0_DATA_TXCNT_MASK);

                if (tx_status0 & (BWI_TXSTATUS0_AMPDU | BWI_TXSTATUS0_PENDING))
                        continue;

                _bwi_txeof(sc, le16toh(tx_id), tx_status0 & BWI_TXSTATUS0_ACKED,
                    data_txcnt);
        }

        bwi_start_locked(sc);
}

static int
bwi_bbp_power_on(struct bwi_softc *sc, enum bwi_clock_mode clk_mode)
{
        bwi_power_on(sc, 1);
        return bwi_set_clock_mode(sc, clk_mode);
}

static void
bwi_bbp_power_off(struct bwi_softc *sc)
{
        bwi_set_clock_mode(sc, BWI_CLOCK_MODE_SLOW);
        bwi_power_off(sc, 1);
}

static int
bwi_get_pwron_delay(struct bwi_softc *sc)
{
        struct bwi_regwin *com, *old;
        struct bwi_clock_freq freq;
        uint32_t val;
        int error;

        com = &sc->sc_com_regwin;
        KASSERT(BWI_REGWIN_EXIST(com), ("no regwin"));

        if ((sc->sc_cap & BWI_CAP_CLKMODE) == 0)
                return 0;

        error = bwi_regwin_switch(sc, com, &old);
        if (error)
                return error;

        bwi_get_clock_freq(sc, &freq);

        val = CSR_READ_4(sc, BWI_PLL_ON_DELAY);
        sc->sc_pwron_delay = howmany((val + 2) * 1000000, freq.clkfreq_min);
        DPRINTF(sc, BWI_DBG_ATTACH, "power on delay %u\n", sc->sc_pwron_delay);

        return bwi_regwin_switch(sc, old, NULL);
}

static int
bwi_bus_attach(struct bwi_softc *sc)
{
        struct bwi_regwin *bus, *old;
        int error;

        bus = &sc->sc_bus_regwin;

        error = bwi_regwin_switch(sc, bus, &old);
        if (error)
                return error;

        if (!bwi_regwin_is_enabled(sc, bus))
                bwi_regwin_enable(sc, bus, 0);

        /* Disable interripts */
        CSR_WRITE_4(sc, BWI_INTRVEC, 0);

        return bwi_regwin_switch(sc, old, NULL);
}

static const char *
bwi_regwin_name(const struct bwi_regwin *rw)
{
        switch (rw->rw_type) {
        case BWI_REGWIN_T_COM:
                return "COM";
        case BWI_REGWIN_T_BUSPCI:
                return "PCI";
        case BWI_REGWIN_T_MAC:
                return "MAC";
        case BWI_REGWIN_T_BUSPCIE:
                return "PCIE";
        }
        panic("unknown regwin type 0x%04x\n", rw->rw_type);
        return NULL;
}

static uint32_t
bwi_regwin_disable_bits(struct bwi_softc *sc)
{
        uint32_t busrev;

        /* XXX cache this */
        busrev = __SHIFTOUT(CSR_READ_4(sc, BWI_ID_LO), BWI_ID_LO_BUSREV_MASK);
        DPRINTF(sc, BWI_DBG_ATTACH | BWI_DBG_INIT | BWI_DBG_MISC,
                "bus rev %u\n", busrev);

        if (busrev == BWI_BUSREV_0)
                return BWI_STATE_LO_DISABLE1;
        else if (busrev == BWI_BUSREV_1)
                return BWI_STATE_LO_DISABLE2;
        else
                return (BWI_STATE_LO_DISABLE1 | BWI_STATE_LO_DISABLE2);
}

int
bwi_regwin_is_enabled(struct bwi_softc *sc, struct bwi_regwin *rw)
{
        uint32_t val, disable_bits;

        disable_bits = bwi_regwin_disable_bits(sc);
        val = CSR_READ_4(sc, BWI_STATE_LO);

        if ((val & (BWI_STATE_LO_CLOCK |
                    BWI_STATE_LO_RESET |
                    disable_bits)) == BWI_STATE_LO_CLOCK) {
                DPRINTF(sc, BWI_DBG_ATTACH | BWI_DBG_INIT, "%s is enabled\n",
                        bwi_regwin_name(rw));
                return 1;
        } else {
                DPRINTF(sc, BWI_DBG_ATTACH | BWI_DBG_INIT, "%s is disabled\n",
                        bwi_regwin_name(rw));
                return 0;
        }
}

void
bwi_regwin_disable(struct bwi_softc *sc, struct bwi_regwin *rw, uint32_t flags)
{
        uint32_t state_lo, disable_bits;
        int i;

        state_lo = CSR_READ_4(sc, BWI_STATE_LO);

        /*
         * If current regwin is in 'reset' state, it was already disabled.
         */
        if (state_lo & BWI_STATE_LO_RESET) {
                DPRINTF(sc, BWI_DBG_ATTACH | BWI_DBG_INIT,
                        "%s was already disabled\n", bwi_regwin_name(rw));
                return;
        }

        disable_bits = bwi_regwin_disable_bits(sc);

        /*
         * Disable normal clock
         */
        state_lo = BWI_STATE_LO_CLOCK | disable_bits;
        CSR_WRITE_4(sc, BWI_STATE_LO, state_lo);

        /*
         * Wait until normal clock is disabled
         */
#define NRETRY  1000
        for (i = 0; i < NRETRY; ++i) {
                state_lo = CSR_READ_4(sc, BWI_STATE_LO);
                if (state_lo & disable_bits)
                        break;
                DELAY(10);
        }
        if (i == NRETRY) {
                device_printf(sc->sc_dev, "%s disable clock timeout\n",
                              bwi_regwin_name(rw));
        }

        for (i = 0; i < NRETRY; ++i) {
                uint32_t state_hi;

                state_hi = CSR_READ_4(sc, BWI_STATE_HI);
                if ((state_hi & BWI_STATE_HI_BUSY) == 0)
                        break;
                DELAY(10);
        }
        if (i == NRETRY) {
                device_printf(sc->sc_dev, "%s wait BUSY unset timeout\n",
                              bwi_regwin_name(rw));
        }
#undef NRETRY

        /*
         * Reset and disable regwin with gated clock
         */
        state_lo = BWI_STATE_LO_RESET | disable_bits |
                   BWI_STATE_LO_CLOCK | BWI_STATE_LO_GATED_CLOCK |
                   __SHIFTIN(flags, BWI_STATE_LO_FLAGS_MASK);
        CSR_WRITE_4(sc, BWI_STATE_LO, state_lo);

        /* Flush pending bus write */
        CSR_READ_4(sc, BWI_STATE_LO);
        DELAY(1);

        /* Reset and disable regwin */
        state_lo = BWI_STATE_LO_RESET | disable_bits |
                   __SHIFTIN(flags, BWI_STATE_LO_FLAGS_MASK);
        CSR_WRITE_4(sc, BWI_STATE_LO, state_lo);

        /* Flush pending bus write */
        CSR_READ_4(sc, BWI_STATE_LO);
        DELAY(1);
}

void
bwi_regwin_enable(struct bwi_softc *sc, struct bwi_regwin *rw, uint32_t flags)
{
        uint32_t state_lo, state_hi, imstate;

        bwi_regwin_disable(sc, rw, flags);

        /* Reset regwin with gated clock */
        state_lo = BWI_STATE_LO_RESET |
                   BWI_STATE_LO_CLOCK |
                   BWI_STATE_LO_GATED_CLOCK |
                   __SHIFTIN(flags, BWI_STATE_LO_FLAGS_MASK);
        CSR_WRITE_4(sc, BWI_STATE_LO, state_lo);

        /* Flush pending bus write */
        CSR_READ_4(sc, BWI_STATE_LO);
        DELAY(1);

        state_hi = CSR_READ_4(sc, BWI_STATE_HI);
        if (state_hi & BWI_STATE_HI_SERROR)
                CSR_WRITE_4(sc, BWI_STATE_HI, 0);

        imstate = CSR_READ_4(sc, BWI_IMSTATE);
        if (imstate & (BWI_IMSTATE_INBAND_ERR | BWI_IMSTATE_TIMEOUT)) {
                imstate &= ~(BWI_IMSTATE_INBAND_ERR | BWI_IMSTATE_TIMEOUT);
                CSR_WRITE_4(sc, BWI_IMSTATE, imstate);
        }

        /* Enable regwin with gated clock */
        state_lo = BWI_STATE_LO_CLOCK |
                   BWI_STATE_LO_GATED_CLOCK |
                   __SHIFTIN(flags, BWI_STATE_LO_FLAGS_MASK);
        CSR_WRITE_4(sc, BWI_STATE_LO, state_lo);

        /* Flush pending bus write */
        CSR_READ_4(sc, BWI_STATE_LO);
        DELAY(1);

        /* Enable regwin with normal clock */
        state_lo = BWI_STATE_LO_CLOCK |
                   __SHIFTIN(flags, BWI_STATE_LO_FLAGS_MASK);
        CSR_WRITE_4(sc, BWI_STATE_LO, state_lo);

        /* Flush pending bus write */
        CSR_READ_4(sc, BWI_STATE_LO);
        DELAY(1);
}

static void
bwi_set_bssid(struct bwi_softc *sc, const uint8_t *bssid)
{
        struct bwi_mac *mac;
        struct bwi_myaddr_bssid buf;
        const uint8_t *p;
        uint32_t val;
        int n, i;

        KASSERT(sc->sc_cur_regwin->rw_type == BWI_REGWIN_T_MAC,
            ("current regwin type %d", sc->sc_cur_regwin->rw_type));
        mac = (struct bwi_mac *)sc->sc_cur_regwin;

        bwi_set_addr_filter(sc, BWI_ADDR_FILTER_BSSID, bssid);

        bcopy(sc->sc_ic.ic_macaddr, buf.myaddr, sizeof(buf.myaddr));
        bcopy(bssid, buf.bssid, sizeof(buf.bssid));

        n = sizeof(buf) / sizeof(val);
        p = (const uint8_t *)&buf;
        for (i = 0; i < n; ++i) {
                int j;

                val = 0;
                for (j = 0; j < sizeof(val); ++j)
                        val |= ((uint32_t)(*p++)) << (j * 8);

                TMPLT_WRITE_4(mac, 0x20 + (i * sizeof(val)), val);
        }
}

static void
bwi_updateslot(struct ieee80211com *ic)
{
        struct bwi_softc *sc = ic->ic_softc;
        struct bwi_mac *mac;

        BWI_LOCK(sc);
        if (sc->sc_flags & BWI_F_RUNNING) {
                DPRINTF(sc, BWI_DBG_80211, "%s\n", __func__);

                KASSERT(sc->sc_cur_regwin->rw_type == BWI_REGWIN_T_MAC,
                    ("current regwin type %d", sc->sc_cur_regwin->rw_type));
                mac = (struct bwi_mac *)sc->sc_cur_regwin;

                bwi_mac_updateslot(mac, (ic->ic_flags & IEEE80211_F_SHSLOT));
        }
        BWI_UNLOCK(sc);
}

static void
bwi_calibrate(void *xsc)
{
        struct bwi_softc *sc = xsc;
        struct bwi_mac *mac;

        BWI_ASSERT_LOCKED(sc);

        KASSERT(sc->sc_ic.ic_opmode != IEEE80211_M_MONITOR,
            ("opmode %d", sc->sc_ic.ic_opmode));

        KASSERT(sc->sc_cur_regwin->rw_type == BWI_REGWIN_T_MAC,
            ("current regwin type %d", sc->sc_cur_regwin->rw_type));
        mac = (struct bwi_mac *)sc->sc_cur_regwin;

        bwi_mac_calibrate_txpower(mac, sc->sc_txpwrcb_type);
        sc->sc_txpwrcb_type = BWI_TXPWR_CALIB;

        /* XXX 15 seconds */
        callout_reset(&sc->sc_calib_ch, hz * 15, bwi_calibrate, sc);
}

static int
bwi_calc_rssi(struct bwi_softc *sc, const struct bwi_rxbuf_hdr *hdr)
{
        struct bwi_mac *mac;

        KASSERT(sc->sc_cur_regwin->rw_type == BWI_REGWIN_T_MAC,
            ("current regwin type %d", sc->sc_cur_regwin->rw_type));
        mac = (struct bwi_mac *)sc->sc_cur_regwin;

        return bwi_rf_calc_rssi(mac, hdr);
}

static int
bwi_calc_noise(struct bwi_softc *sc)
{
        struct bwi_mac *mac;

        KASSERT(sc->sc_cur_regwin->rw_type == BWI_REGWIN_T_MAC,
            ("current regwin type %d", sc->sc_cur_regwin->rw_type));
        mac = (struct bwi_mac *)sc->sc_cur_regwin;

        return bwi_rf_calc_noise(mac);
}

static __inline uint8_t
bwi_plcp2rate(const uint32_t plcp0, enum ieee80211_phytype type)
{
        uint32_t plcp = le32toh(plcp0) & IEEE80211_OFDM_PLCP_RATE_MASK;
        return (ieee80211_plcp2rate(plcp, type));
}

static void
bwi_rx_radiotap(struct bwi_softc *sc, struct mbuf *m,
    struct bwi_rxbuf_hdr *hdr, const void *plcp, int rate, int rssi, int noise)
{
        const struct ieee80211_frame_min *wh;

        sc->sc_rx_th.wr_flags = IEEE80211_RADIOTAP_F_FCS;
        if (htole16(hdr->rxh_flags1) & BWI_RXH_F1_SHPREAMBLE)
                sc->sc_rx_th.wr_flags |= IEEE80211_RADIOTAP_F_SHORTPRE;

        wh = mtod(m, const struct ieee80211_frame_min *);
        if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED)
                sc->sc_rx_th.wr_flags |= IEEE80211_RADIOTAP_F_WEP;

        sc->sc_rx_th.wr_tsf = hdr->rxh_tsf; /* No endian conversion */
        sc->sc_rx_th.wr_rate = rate;
        sc->sc_rx_th.wr_antsignal = rssi;
        sc->sc_rx_th.wr_antnoise = noise;
}

static void
bwi_led_attach(struct bwi_softc *sc)
{
        const uint8_t *led_act = NULL;
        uint16_t gpio, val[BWI_LED_MAX];
        int i;

        for (i = 0; i < nitems(bwi_vendor_led_act); ++i) {
                if (sc->sc_pci_subvid == bwi_vendor_led_act[i].vid) {
                        led_act = bwi_vendor_led_act[i].led_act;
                        break;
                }
        }
        if (led_act == NULL)
                led_act = bwi_default_led_act;

        gpio = bwi_read_sprom(sc, BWI_SPROM_GPIO01);
        val[0] = __SHIFTOUT(gpio, BWI_SPROM_GPIO_0);
        val[1] = __SHIFTOUT(gpio, BWI_SPROM_GPIO_1);

        gpio = bwi_read_sprom(sc, BWI_SPROM_GPIO23);
        val[2] = __SHIFTOUT(gpio, BWI_SPROM_GPIO_2);
        val[3] = __SHIFTOUT(gpio, BWI_SPROM_GPIO_3);

        for (i = 0; i < BWI_LED_MAX; ++i) {
                struct bwi_led *led = &sc->sc_leds[i];

                if (val[i] == 0xff) {
                        led->l_act = led_act[i];
                } else {
                        if (val[i] & BWI_LED_ACT_LOW)
                                led->l_flags |= BWI_LED_F_ACTLOW;
                        led->l_act = __SHIFTOUT(val[i], BWI_LED_ACT_MASK);
                }
                led->l_mask = (1 << i);

                if (led->l_act == BWI_LED_ACT_BLINK_SLOW ||
                    led->l_act == BWI_LED_ACT_BLINK_POLL ||
                    led->l_act == BWI_LED_ACT_BLINK) {
                        led->l_flags |= BWI_LED_F_BLINK;
                        if (led->l_act == BWI_LED_ACT_BLINK_POLL)
                                led->l_flags |= BWI_LED_F_POLLABLE;
                        else if (led->l_act == BWI_LED_ACT_BLINK_SLOW)
                                led->l_flags |= BWI_LED_F_SLOW;

                        if (sc->sc_blink_led == NULL) {
                                sc->sc_blink_led = led;
                                if (led->l_flags & BWI_LED_F_SLOW)
                                        BWI_LED_SLOWDOWN(sc->sc_led_idle);
                        }
                }

                DPRINTF(sc, BWI_DBG_LED | BWI_DBG_ATTACH,
                        "%dth led, act %d, lowact %d\n", i,
                        led->l_act, led->l_flags & BWI_LED_F_ACTLOW);
        }
        callout_init_mtx(&sc->sc_led_blink_ch, &sc->sc_mtx, 0);
}

static __inline uint16_t
bwi_led_onoff(const struct bwi_led *led, uint16_t val, int on)
{
        if (led->l_flags & BWI_LED_F_ACTLOW)
                on = !on;
        if (on)
                val |= led->l_mask;
        else
                val &= ~led->l_mask;
        return val;
}

static void
bwi_led_newstate(struct bwi_softc *sc, enum ieee80211_state nstate)
{
        struct ieee80211com *ic = &sc->sc_ic;
        uint16_t val;
        int i;

        if (nstate == IEEE80211_S_INIT) {
                callout_stop(&sc->sc_led_blink_ch);
                sc->sc_led_blinking = 0;
        }

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

        val = CSR_READ_2(sc, BWI_MAC_GPIO_CTRL);
        for (i = 0; i < BWI_LED_MAX; ++i) {
                struct bwi_led *led = &sc->sc_leds[i];
                int on;

                if (led->l_act == BWI_LED_ACT_UNKN ||
                    led->l_act == BWI_LED_ACT_NULL)
                        continue;

                if ((led->l_flags & BWI_LED_F_BLINK) &&
                    nstate != IEEE80211_S_INIT)
                        continue;

                switch (led->l_act) {
                case BWI_LED_ACT_ON:    /* Always on */
                        on = 1;
                        break;
                case BWI_LED_ACT_OFF:   /* Always off */
                case BWI_LED_ACT_5GHZ:  /* TODO: 11A */
                        on = 0;
                        break;
                default:
                        on = 1;
                        switch (nstate) {
                        case IEEE80211_S_INIT:
                                on = 0;
                                break;
                        case IEEE80211_S_RUN:
                                if (led->l_act == BWI_LED_ACT_11G &&
                                    ic->ic_curmode != IEEE80211_MODE_11G)
                                        on = 0;
                                break;
                        default:
                                if (led->l_act == BWI_LED_ACT_ASSOC)
                                        on = 0;
                                break;
                        }
                        break;
                }

                val = bwi_led_onoff(led, val, on);
        }
        CSR_WRITE_2(sc, BWI_MAC_GPIO_CTRL, val);
}
static void
bwi_led_event(struct bwi_softc *sc, int event)
{
        struct bwi_led *led = sc->sc_blink_led;
        int rate;

        if (event == BWI_LED_EVENT_POLL) {
                if ((led->l_flags & BWI_LED_F_POLLABLE) == 0)
                        return;
                if (ticks - sc->sc_led_ticks < sc->sc_led_idle)
                        return;
        }

        sc->sc_led_ticks = ticks;
        if (sc->sc_led_blinking)
                return;

        switch (event) {
        case BWI_LED_EVENT_RX:
                rate = sc->sc_rx_rate;
                break;
        case BWI_LED_EVENT_TX:
                rate = sc->sc_tx_rate;
                break;
        case BWI_LED_EVENT_POLL:
                rate = 0;
                break;
        default:
                panic("unknown LED event %d\n", event);
                break;
        }
        bwi_led_blink_start(sc, bwi_led_duration[rate].on_dur,
            bwi_led_duration[rate].off_dur);
}

static void
bwi_led_blink_start(struct bwi_softc *sc, int on_dur, int off_dur)
{
        struct bwi_led *led = sc->sc_blink_led;
        uint16_t val;

        val = CSR_READ_2(sc, BWI_MAC_GPIO_CTRL);
        val = bwi_led_onoff(led, val, 1);
        CSR_WRITE_2(sc, BWI_MAC_GPIO_CTRL, val);

        if (led->l_flags & BWI_LED_F_SLOW) {
                BWI_LED_SLOWDOWN(on_dur);
                BWI_LED_SLOWDOWN(off_dur);
        }

        sc->sc_led_blinking = 1;
        sc->sc_led_blink_offdur = off_dur;

        callout_reset(&sc->sc_led_blink_ch, on_dur, bwi_led_blink_next, sc);
}

static void
bwi_led_blink_next(void *xsc)
{
        struct bwi_softc *sc = xsc;
        uint16_t val;

        val = CSR_READ_2(sc, BWI_MAC_GPIO_CTRL);
        val = bwi_led_onoff(sc->sc_blink_led, val, 0);
        CSR_WRITE_2(sc, BWI_MAC_GPIO_CTRL, val);

        callout_reset(&sc->sc_led_blink_ch, sc->sc_led_blink_offdur,
            bwi_led_blink_end, sc);
}

static void
bwi_led_blink_end(void *xsc)
{
        struct bwi_softc *sc = xsc;
        sc->sc_led_blinking = 0;
}

static void
bwi_restart(void *xsc, int pending)
{
        struct bwi_softc *sc = xsc;

        device_printf(sc->sc_dev, "%s begin, help!\n", __func__);
        BWI_LOCK(sc);
        bwi_init_statechg(sc, 0);
#if 0
        bwi_start_locked(sc);
#endif
        BWI_UNLOCK(sc);
}