/*      $NetBSD: malo.c,v 1.21 2024/09/07 06:17:37 andvar Exp $ */
/*      $OpenBSD: malo.c,v 1.92 2010/08/27 17:08:00 jsg Exp $ */

/*
 * Copyright (c) 2006 Claudio Jeker <claudio@openbsd.org>
 * Copyright (c) 2006 Marcus Glocker <mglocker@openbsd.org>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: malo.c,v 1.21 2024/09/07 06:17:37 andvar Exp $");

#include <sys/param.h>
#include <sys/types.h>

#include <sys/device.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/proc.h>
#include <sys/socket.h>
#include <sys/sockio.h>
#include <sys/systm.h>
#include <sys/bus.h>

#include <machine/endian.h>
#include <machine/intr.h>

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

#include <net/bpf.h>

#include <netinet/in.h>
#include <netinet/in_systm.h>

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

#include <dev/firmload.h>

#include <dev/ic/malovar.h>
#include <dev/ic/maloreg.h>

#ifdef MALO_DEBUG
int malo_d = 2;
#define DPRINTF(l, x...)        do { if ((l) <= malo_d) printf(x); } while (0)
#else
#define DPRINTF(l, x...)
#endif

/* internal structures and defines */
struct malo_node {
        struct ieee80211_node           ni;
};

struct malo_rx_data {
        bus_dmamap_t    map;
        struct mbuf     *m;
};

struct malo_tx_data {
        bus_dmamap_t            map;
        struct mbuf             *m;
        uint32_t                softstat;
        struct ieee80211_node   *ni;
};

/* RX descriptor used by HW */
struct malo_rx_desc {
        uint8_t         rxctrl;
        uint8_t         rssi;
        uint8_t         status;
        uint8_t         channel;
        uint16_t        len;
        uint8_t         reserved1;      /* actually unused */
        uint8_t         datarate;
        uint32_t        physdata;       /* DMA address of data */
        uint32_t        physnext;       /* DMA address of next control block */
        uint16_t        qosctrl;
        uint16_t        reserved2;
} __packed;

/* TX descriptor used by HW */
struct malo_tx_desc {
        uint32_t        status;
#define MALO_TXD_STATUS_IDLE            0x00000000
#define MALO_TXD_STATUS_USED            0x00000001 
#define MALO_TXD_STATUS_OK          0x00000001
#define MALO_TXD_STATUS_OK_RETRY        0x00000002
#define MALO_TXD_STATUS_OK_MORE_RETRY       0x00000004
#define MALO_TXD_STATUS_MULTICAST_TX        0x00000008
#define MALO_TXD_STATUS_BROADCAST_TX        0x00000010
#define MALO_TXD_STATUS_FAILED_LINK_ERROR   0x00000020
#define MALO_TXD_STATUS_FAILED_EXCEED_LIMIT 0x00000040
#define MALO_TXD_STATUS_FAILED_XRETRY   MALO_TXD_STATUS_FAILED_EXCEED_LIMIT
#define MALO_TXD_STATUS_FAILED_AGING        0x00000080
#define MALO_TXD_STATUS_FW_OWNED        0x80000000
        uint8_t         datarate;
        uint8_t         txpriority;
        uint16_t        qosctrl;
        uint32_t        physdata;       /* DMA address of data */
        uint16_t        len;
        uint8_t         destaddr[6];
        uint32_t        physnext;       /* DMA address of next control block */
        uint32_t        reserved1;      /* SAP packet info ??? */
        uint32_t        reserved2;
} __packed;

#define MALO_RX_RING_COUNT      256
#define MALO_TX_RING_COUNT      256
#define MALO_MAX_SCATTER        8       /* XXX unknown, wild guess */
#define MALO_CMD_TIMEOUT        50      /* MALO_CMD_TIMEOUT * 100us */

/*
 * Firmware commands
 */
#define MALO_CMD_GET_HW_SPEC            0x0003
#define MALO_CMD_SET_RADIO              0x001c
#define MALO_CMD_SET_AID                0x010d
#define MALO_CMD_SET_TXPOWER            0x001e
#define MALO_CMD_SET_ANTENNA            0x0020
#define MALO_CMD_SET_PRESCAN            0x0107
#define MALO_CMD_SET_POSTSCAN           0x0108
#define MALO_CMD_SET_RATE               0x0110
#define MALO_CMD_SET_CHANNEL            0x010a
#define MALO_CMD_SET_RTS                0x0113
#define MALO_CMD_SET_SLOT               0x0114
#define MALO_CMD_RESPONSE               0x8000

#define MALO_CMD_RESULT_OK              0x0000  /* everything is fine */
#define MALO_CMD_RESULT_ERROR           0x0001  /* general error */
#define MALO_CMD_RESULT_NOSUPPORT       0x0002  /* command not valid */
#define MALO_CMD_RESULT_PENDING         0x0003  /* will be processed */
#define MALO_CMD_RESULT_BUSY            0x0004  /* command ignored */
#define MALO_CMD_RESULT_PARTIALDATA     0x0005  /* buffer too small */

struct malo_cmdheader {
        uint16_t        cmd;
        uint16_t        size;           /* size of the command, incl. header */
        uint16_t        seqnum;         /* seems not to matter that much */
        uint16_t        result;         /* set to 0 on request */
        /* following the data payload, up to 256 bytes */
};

struct malo_hw_spec {
        uint16_t        HwVersion;
        uint16_t        NumOfWCB;
        uint16_t        NumOfMCastAdr;
        uint8_t         PermanentAddress[6];
        uint16_t        RegionCode;
        uint16_t        NumberOfAntenna;
        uint32_t        FWReleaseNumber;
        uint32_t        WcbBase0;
        uint32_t        RxPdWrPtr;
        uint32_t        RxPdRdPtr;
        uint32_t        CookiePtr;
        uint32_t        WcbBase1;
        uint32_t        WcbBase2;
        uint32_t        WcbBase3;
} __packed;

struct malo_cmd_radio {
        uint16_t        action;
        uint16_t        preamble_mode;
        uint16_t        enable;
} __packed;

struct malo_cmd_aid {
        uint16_t        associd;
        uint8_t         macaddr[6];
        uint32_t        gprotection;
        uint8_t         aprates[14];
} __packed;

struct malo_cmd_txpower {
        uint16_t        action;
        uint16_t        supportpowerlvl;
        uint16_t        currentpowerlvl;
        uint16_t        reserved;
        uint16_t        powerlvllist[8];
} __packed;

struct malo_cmd_antenna {
        uint16_t        action;
        uint16_t        mode;
} __packed;

struct malo_cmd_postscan {
        uint32_t        isibss;
        uint8_t         bssid[6];
} __packed;

struct malo_cmd_channel {
        uint16_t        action;
        uint8_t         channel;
} __packed;

struct malo_cmd_rate {
        uint8_t         dataratetype;
        uint8_t         rateindex;
        uint8_t         aprates[14];
} __packed;

struct malo_cmd_rts {
        uint16_t        action;
        uint32_t        threshold;
} __packed;

struct malo_cmd_slot {
        uint16_t        action;
        uint8_t         slot;
} __packed;

#define malo_mem_write4(sc, off, x) \
        bus_space_write_4((sc)->sc_mem1_bt, (sc)->sc_mem1_bh, (off), (x))
#define malo_mem_write2(sc, off, x) \
        bus_space_write_2((sc)->sc_mem1_bt, (sc)->sc_mem1_bh, (off), (x))
#define malo_mem_write1(sc, off, x) \
        bus_space_write_1((sc)->sc_mem1_bt, (sc)->sc_mem1_bh, (off), (x))

#define malo_mem_read4(sc, off) \
        bus_space_read_4((sc)->sc_mem1_bt, (sc)->sc_mem1_bh, (off))
#define malo_mem_read1(sc, off) \
        bus_space_read_1((sc)->sc_mem1_bt, (sc)->sc_mem1_bh, (off))

#define malo_ctl_write4(sc, off, x) \
        bus_space_write_4((sc)->sc_mem2_bt, (sc)->sc_mem2_bh, (off), (x))
#define malo_ctl_read4(sc, off) \
        bus_space_read_4((sc)->sc_mem2_bt, (sc)->sc_mem2_bh, (off))
#define malo_ctl_read1(sc, off) \
        bus_space_read_1((sc)->sc_mem2_bt, (sc)->sc_mem2_bh, (off))

#define malo_ctl_barrier(sc, t) \
        bus_space_barrier((sc)->sc_mem2_bt, (sc)->sc_mem2_bh, 0x0c00, 0xff, (t))

static int      malo_alloc_cmd(struct malo_softc *sc);
static void     malo_free_cmd(struct malo_softc *sc);
static void     malo_send_cmd(struct malo_softc *sc, bus_addr_t addr);
static int      malo_send_cmd_dma(struct malo_softc *sc, bus_addr_t addr);
static int      malo_alloc_rx_ring(struct malo_softc *sc, struct malo_rx_ring *ring,
            int count);
static void     malo_reset_rx_ring(struct malo_softc *sc, struct malo_rx_ring *ring);
static void     malo_free_rx_ring(struct malo_softc *sc, struct malo_rx_ring *ring);
static int      malo_alloc_tx_ring(struct malo_softc *sc, struct malo_tx_ring *ring,
            int count);
static void     malo_reset_tx_ring(struct malo_softc *sc, struct malo_tx_ring *ring);
static void     malo_free_tx_ring(struct malo_softc *sc, struct malo_tx_ring *ring);
static int      malo_ioctl(struct ifnet *ifp, u_long cmd, void* data);
static void     malo_start(struct ifnet *ifp);
static void     malo_watchdog(struct ifnet *ifp);
static int      malo_newstate(struct ieee80211com *ic, enum ieee80211_state nstate,
            int arg);
static void     malo_newassoc(struct ieee80211_node *ni, int isnew);
static struct ieee80211_node *
        malo_node_alloc(struct ieee80211_node_table *nt);
static int      malo_media_change(struct ifnet *ifp);
static void     malo_media_status(struct ifnet *ifp, struct ifmediareq *imr);
static int      malo_chip2rate(int chip_rate);
static int      malo_fix2rate(int fix_rate);
static void     malo_next_scan(void *arg);
static void     malo_tx_intr(struct malo_softc *sc);
static int      malo_tx_data(struct malo_softc *sc, struct mbuf *m0,
            struct ieee80211_node *ni);
static void     malo_tx_setup_desc(struct malo_softc *sc, struct malo_tx_desc *desc,
            int len, int rate, const bus_dma_segment_t *segs, int nsegs);
static void     malo_rx_intr(struct malo_softc *sc);
static int      malo_load_bootimg(struct malo_softc *sc);
static int      malo_load_firmware(struct malo_softc *sc);

static int      malo_set_slot(struct malo_softc *sc);
static void malo_update_slot(struct ifnet* ifp);
#ifdef MALO_DEBUG
static void     malo_hexdump(void *buf, int len);
#endif
static const char *malo_cmd_string(uint16_t cmd);
static const char *malo_cmd_string_result(uint16_t result);
static int      malo_cmd_get_spec(struct malo_softc *sc);
static int      malo_cmd_set_prescan(struct malo_softc *sc);
static int      malo_cmd_set_postscan(struct malo_softc *sc, uint8_t *macaddr,
            uint8_t ibsson);
static int      malo_cmd_set_channel(struct malo_softc *sc, struct ieee80211_channel *chan);
static int      malo_cmd_set_antenna(struct malo_softc *sc, uint16_t antenna_type);
static int      malo_cmd_set_radio(struct malo_softc *sc, uint16_t mode,
            uint16_t preamble);
static int      malo_cmd_set_aid(struct malo_softc *sc, uint8_t *bssid,
            uint16_t associd);
static int      malo_cmd_set_txpower(struct malo_softc *sc, unsigned int powerlevel);
static int      malo_cmd_set_rts(struct malo_softc *sc, uint32_t threshold);
static int      malo_cmd_set_slot(struct malo_softc *sc, uint8_t slot);
static int      malo_cmd_set_rate(struct malo_softc *sc, uint8_t rate);
static void     malo_cmd_response(struct malo_softc *sc);

int
malo_intr(void *arg)
{
        struct malo_softc *sc = arg;
        uint32_t status;

        status = malo_ctl_read4(sc, MALO_REG_A2H_INTERRUPT_CAUSE);
        if (status == 0xffffffff || status == 0)
                /* not for us */
                return (0);

        /* disable interrupts */
        malo_ctl_read4(sc, MALO_REG_A2H_INTERRUPT_CAUSE);
        malo_ctl_write4(sc, MALO_REG_A2H_INTERRUPT_CAUSE, 0);
        malo_ctl_write4(sc, MALO_REG_A2H_INTERRUPT_MASK, 0);
        malo_ctl_write4(sc, MALO_REG_A2H_INTERRUPT_STATUS_MASK, 0);

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

void
malo_softintr(void *arg)
{
        struct malo_softc *sc = arg;
        uint32_t status;

        status = malo_ctl_read4(sc, MALO_REG_A2H_INTERRUPT_CAUSE);
        if (status == 0xffffffff || status == 0)
                goto out;       /* not for us */

        if (status & MALO_A2HRIC_BIT_TX_DONE)
                malo_tx_intr(sc);
        if (status & MALO_A2HRIC_BIT_RX_RDY)
                malo_rx_intr(sc);
        if (status & MALO_A2HRIC_BIT_OPC_DONE) {
                /* XXX cmd done interrupt handling doesn't work yet */
                DPRINTF(1, "%s: got cmd done interrupt\n",
                    device_xname(sc->sc_dev));
                //malo_cmd_response(sc);
        }

        if (status & ~0x7) {
                DPRINTF(1, "%s: unknown interrupt %x\n",
                    device_xname(sc->sc_dev), status);
        }

        /* just ack the interrupt */
        malo_ctl_write4(sc, MALO_REG_A2H_INTERRUPT_CAUSE, 0);

out:
        /* enable interrupts */
        malo_ctl_write4(sc, MALO_REG_A2H_INTERRUPT_MASK, 0x1f);
        malo_ctl_barrier(sc, BUS_SPACE_BARRIER_WRITE);
        malo_ctl_write4(sc, MALO_REG_A2H_INTERRUPT_STATUS_MASK, 0x1f);
        malo_ctl_barrier(sc, BUS_SPACE_BARRIER_WRITE);
}

int
malo_attach(struct malo_softc *sc)
{
        struct ieee80211com *ic = &sc->sc_ic;
        struct ifnet *ifp = &sc->sc_if;
        int i;

        /* initialize channel scanning timer */
        callout_init(&sc->sc_scan_to, 0);
        callout_setfunc(&sc->sc_scan_to, malo_next_scan, sc);

        /* allocate DMA structures */
        malo_alloc_cmd(sc);
        malo_alloc_rx_ring(sc, &sc->sc_rxring, MALO_RX_RING_COUNT);
        malo_alloc_tx_ring(sc, &sc->sc_txring, MALO_TX_RING_COUNT);

        /* setup interface */
        ifp->if_softc = sc;
        ifp->if_init = malo_init;
        ifp->if_stop = malo_stop;
        ifp->if_ioctl = malo_ioctl;
        ifp->if_start = malo_start;
        ifp->if_watchdog = malo_watchdog;
        ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST;
        memcpy(ifp->if_xname, device_xname(sc->sc_dev), IFNAMSIZ);
        IFQ_SET_MAXLEN(&ifp->if_snd, IFQ_MAXLEN);
        IFQ_SET_READY(&ifp->if_snd);

        /* set supported rates */
        ic->ic_sup_rates[IEEE80211_MODE_11B] = ieee80211_std_rateset_11b;
        ic->ic_sup_rates[IEEE80211_MODE_11G] = ieee80211_std_rateset_11g;
        sc->sc_last_txrate = -1;

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

        /* OpenBSD supports IEEE80211_C_RSN too */
        /* set the rest */
        ic->ic_ifp = ifp;
        ic->ic_caps =
            IEEE80211_C_IBSS |
            IEEE80211_C_MONITOR |
            IEEE80211_C_SHPREAMBLE |
            IEEE80211_C_SHSLOT |
            IEEE80211_C_WEP |
            IEEE80211_C_WPA;
        ic->ic_opmode = IEEE80211_M_STA;
        ic->ic_state = IEEE80211_S_INIT;
        for (i = 0; i < 6; i++)
                ic->ic_myaddr[i] = malo_ctl_read1(sc, 0xa528 + i);

        /* show our mac address */
        aprint_normal_dev(sc->sc_dev, "address %s\n",
            ether_sprintf(ic->ic_myaddr));

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

        /* post attach vector functions */
        sc->sc_newstate = ic->ic_newstate;
        ic->ic_newstate = malo_newstate;
        ic->ic_newassoc = malo_newassoc;
        ic->ic_node_alloc = malo_node_alloc;
        ic->ic_updateslot = malo_update_slot;

        ieee80211_media_init(ic, malo_media_change, malo_media_status);

        bpf_attach2(ifp, DLT_IEEE802_11_RADIO,
            sizeof(struct ieee80211_frame) + IEEE80211_RADIOTAP_HDRLEN,
            &sc->sc_drvbpf);

        sc->sc_rxtap_len = sizeof(sc->sc_rxtapu);
        sc->sc_rxtap.wr_ihdr.it_len = htole16(sc->sc_rxtap_len);
        sc->sc_rxtap.wr_ihdr.it_present = htole32(MALO_RX_RADIOTAP_PRESENT);

        sc->sc_txtap_len = sizeof(sc->sc_txtapu);
        sc->sc_txtap.wt_ihdr.it_len = htole16(sc->sc_txtap_len);
        sc->sc_txtap.wt_ihdr.it_present = htole32(MALO_TX_RADIOTAP_PRESENT);

        ieee80211_announce(ic);

        return (0);
}

int
malo_detach(void *arg)
{
        struct malo_softc *sc = arg;
        struct ieee80211com *ic = &sc->sc_ic;
        struct ifnet *ifp = &sc->sc_if;

        malo_stop(ifp, 1);
        /* remove channel scanning timer */
        callout_destroy(&sc->sc_scan_to);
        ieee80211_ifdetach(ic);
        if_detach(ifp);
        malo_free_cmd(sc);
        malo_free_rx_ring(sc, &sc->sc_rxring);
        malo_free_tx_ring(sc, &sc->sc_txring);

        return (0);
}

static int
malo_alloc_cmd(struct malo_softc *sc)
{
        int error, nsegs;

        error = bus_dmamap_create(sc->sc_dmat, PAGE_SIZE, 1,
            PAGE_SIZE, 0, BUS_DMA_ALLOCNOW, &sc->sc_cmd_dmam);
        if (error != 0) {
                aprint_error_dev(sc->sc_dev, "can not create DMA tag\n");
                return (-1);
        }

        error = bus_dmamem_alloc(sc->sc_dmat, PAGE_SIZE, PAGE_SIZE,
            0, &sc->sc_cmd_dmas, 1, &nsegs, BUS_DMA_WAITOK);
        if (error != 0) {
                aprint_error_dev(sc->sc_dev, "error alloc dma memory\n");
                return (-1);
        }

        error = bus_dmamem_map(sc->sc_dmat, &sc->sc_cmd_dmas, nsegs,
            PAGE_SIZE, (void **)&sc->sc_cmd_mem, BUS_DMA_WAITOK);
        if (error != 0) {
                aprint_error_dev(sc->sc_dev, "error map dma memory\n");
                return (-1);
        }

        error = bus_dmamap_load(sc->sc_dmat, sc->sc_cmd_dmam,
            sc->sc_cmd_mem, PAGE_SIZE, NULL, BUS_DMA_NOWAIT);
        if (error != 0) {
                aprint_error_dev(sc->sc_dev, "error load dma memory\n");
                bus_dmamem_free(sc->sc_dmat, &sc->sc_cmd_dmas, nsegs);
                return (-1);
        }

        sc->sc_cookie = sc->sc_cmd_mem;
        *sc->sc_cookie = htole32(0xaa55aa55);
        sc->sc_cmd_mem = ((char*)sc->sc_cmd_mem) + sizeof(uint32_t);
        sc->sc_cookie_dmaaddr = sc->sc_cmd_dmam->dm_segs[0].ds_addr;
        sc->sc_cmd_dmaaddr = sc->sc_cmd_dmam->dm_segs[0].ds_addr +
            sizeof(uint32_t);

        return (0);
}

static void
malo_free_cmd(struct malo_softc *sc)
{
        bus_dmamap_sync(sc->sc_dmat, sc->sc_cmd_dmam, 0, PAGE_SIZE,
            BUS_DMASYNC_POSTWRITE);
        bus_dmamap_unload(sc->sc_dmat, sc->sc_cmd_dmam);
        bus_dmamem_unmap(sc->sc_dmat, sc->sc_cookie, PAGE_SIZE);
        bus_dmamem_free(sc->sc_dmat, &sc->sc_cmd_dmas, 1);
}

static void
malo_send_cmd(struct malo_softc *sc, bus_addr_t addr)
{
        malo_ctl_write4(sc, MALO_REG_GEN_PTR, (uint32_t)addr);
        malo_ctl_barrier(sc, BUS_SPACE_BARRIER_WRITE);
        malo_ctl_write4(sc, MALO_REG_H2A_INTERRUPT_EVENTS, 2); /* CPU_TRANSFER_CMD */
        malo_ctl_barrier(sc, BUS_SPACE_BARRIER_WRITE);
}

static int
malo_send_cmd_dma(struct malo_softc *sc, bus_addr_t addr)
{
        int i;
        struct malo_cmdheader *hdr = sc->sc_cmd_mem;

        malo_send_cmd(sc, addr);

        for (i = 0; i < MALO_CMD_TIMEOUT; i++) {
                delay(100);
                bus_dmamap_sync(sc->sc_dmat, sc->sc_cmd_dmam, 0, PAGE_SIZE,
                    BUS_DMASYNC_POSTWRITE | BUS_DMASYNC_POSTREAD);
                if (hdr->cmd & htole16(0x8000))
                        break;
        }
        if (i == MALO_CMD_TIMEOUT) {
                aprint_error_dev(sc->sc_dev, "timeout while waiting for cmd response!\n");
                return (ETIMEDOUT);
        }

        malo_cmd_response(sc);

        return (0);
}

static int
malo_alloc_rx_ring(struct malo_softc *sc, struct malo_rx_ring *ring, int count)
{
        struct malo_rx_desc *desc;
        struct malo_rx_data *data;
        int i, nsegs, error;

        ring->count = count;
        ring->cur = ring->next = 0;

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

        error = bus_dmamem_alloc(sc->sc_dmat,
            count * sizeof(struct malo_rx_desc),
            PAGE_SIZE, 0, &ring->seg, 1, &nsegs, BUS_DMA_NOWAIT);
            
        if (error != 0) {
                aprint_error_dev(sc->sc_dev, "could not allocate DMA memory\n");
                goto fail;
        }

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

        error = bus_dmamap_load(sc->sc_dmat, ring->map, ring->desc,
            count * sizeof(struct malo_rx_desc), NULL, BUS_DMA_NOWAIT);
        if (error != 0) {
                aprint_error_dev(sc->sc_dev, "could not load desc DMA map\n");
                goto fail;
        }

        ring->physaddr = ring->map->dm_segs->ds_addr;

        ring->data = malloc(count * sizeof (struct malo_rx_data), M_DEVBUF,
            M_WAITOK);

        /*
         * Pre-allocate Rx buffers and populate Rx ring.
         */
        memset(ring->data, 0, count * sizeof (struct malo_rx_data));
        for (i = 0; i < count; i++) {
                desc = &ring->desc[i];
                data = &ring->data[i];

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

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

                MCLGET(data->m, M_DONTWAIT);
                if (!(data->m->m_flags & M_EXT)) {
                        aprint_error_dev(sc->sc_dev, "could not allocate rx mbuf cluster\n");
                        error = ENOMEM;
                        goto fail;
                }

                error = bus_dmamap_load(sc->sc_dmat, data->map,
                    mtod(data->m, void *), MCLBYTES, NULL, BUS_DMA_NOWAIT);
                if (error != 0) {
                        aprint_error_dev(sc->sc_dev, "could not load rx buf DMA map");
                        goto fail;
                }

                desc->status = 1;
                desc->physdata = htole32(data->map->dm_segs->ds_addr);
                desc->physnext = htole32(ring->physaddr +
                    (i + 1) % count * sizeof(struct malo_rx_desc));
        }

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

        return (0);

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

static void
malo_reset_rx_ring(struct malo_softc *sc, struct malo_rx_ring *ring)
{
        int i;

        for (i = 0; i < ring->count; i++)
                ring->desc[i].status = 0;

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

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

static void
malo_free_rx_ring(struct malo_softc *sc, struct malo_rx_ring *ring)
{
        struct malo_rx_data *data;
        int i;

        if (ring->desc != NULL) {
                bus_dmamap_sync(sc->sc_dmat, ring->map, 0,
                    ring->map->dm_mapsize, BUS_DMASYNC_POSTWRITE);
                bus_dmamap_unload(sc->sc_dmat, ring->map);
                bus_dmamem_unmap(sc->sc_dmat, ring->desc,
                    ring->count * sizeof(struct malo_rx_desc));
                bus_dmamem_free(sc->sc_dmat, &ring->seg, 1);
        }

        if (ring->data != NULL) {
                for (i = 0; i < ring->count; i++) {
                        data = &ring->data[i];

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

                        if (data->map != NULL)
                                bus_dmamap_destroy(sc->sc_dmat, data->map);
                }
                free(ring->data, M_DEVBUF);
        }
}

static int
malo_alloc_tx_ring(struct malo_softc *sc, struct malo_tx_ring *ring,
    int count)
{
        int i, nsegs, error;

        ring->count = count;
        ring->queued = 0;
        ring->cur = ring->next = ring->stat = 0;

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

        error = bus_dmamem_alloc(sc->sc_dmat,
            count * sizeof(struct malo_tx_desc), PAGE_SIZE, 0,
            &ring->seg, 1, &nsegs, BUS_DMA_NOWAIT);
        if (error != 0) {
                aprint_error_dev(sc->sc_dev, "could not allocate DMA memory\n");
                goto fail;
        }

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

        error = bus_dmamap_load(sc->sc_dmat, ring->map, ring->desc,
            count * sizeof(struct malo_tx_desc), NULL, BUS_DMA_NOWAIT);
        if (error != 0) {
                aprint_error_dev(sc->sc_dev, "could not load desc DMA map\n");
                goto fail;
        }

        ring->physaddr = ring->map->dm_segs->ds_addr;

        ring->data = malloc(count * sizeof(struct malo_tx_data), M_DEVBUF,
            M_WAITOK | M_ZERO);

        for (i = 0; i < count; i++) {
                error = bus_dmamap_create(sc->sc_dmat, MCLBYTES,
                    MALO_MAX_SCATTER, MCLBYTES, 0, BUS_DMA_NOWAIT,
                    &ring->data[i].map);
                if (error != 0) {
                        aprint_error_dev(sc->sc_dev, "could not create DMA map\n");
                        goto fail;
                }
                ring->desc[i].physnext = htole32(ring->physaddr +
                    (i + 1) % count * sizeof(struct malo_tx_desc));
        }

        return (0);

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

static void
malo_reset_tx_ring(struct malo_softc *sc, struct malo_tx_ring *ring)
{
        struct malo_tx_desc *desc;
        struct malo_tx_data *data;
        int i;

        for (i = 0; i < ring->count; i++) {
                desc = &ring->desc[i];
                data = &ring->data[i];

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

                /*
                 * The node has already been freed at that point so don't call
                 * ieee80211_release_node() here.
                 */
                data->ni = NULL;

                desc->status = 0;
        }

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

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

static void
malo_free_tx_ring(struct malo_softc *sc, struct malo_tx_ring *ring)
{
        struct malo_tx_data *data;
        int i;

        if (ring->desc != NULL) {
                bus_dmamap_sync(sc->sc_dmat, ring->map, 0,
                    ring->map->dm_mapsize, BUS_DMASYNC_POSTWRITE);
                bus_dmamap_unload(sc->sc_dmat, ring->map);
                bus_dmamem_unmap(sc->sc_dmat, ring->desc,
                    ring->count * sizeof(struct malo_tx_desc));
                bus_dmamem_free(sc->sc_dmat, &ring->seg, 1);
        }

        if (ring->data != NULL) {
                for (i = 0; i < ring->count; i++) {
                        data = &ring->data[i];

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

                        /*
                         * The node has already been freed at that point so
                         * don't call ieee80211_release_node() here.
                         */
                        data->ni = NULL;

                        if (data->map != NULL)
                                bus_dmamap_destroy(sc->sc_dmat, data->map);
                }
                free(ring->data, M_DEVBUF);
        }
}

int
malo_init(struct ifnet *ifp)
{
        struct malo_softc *sc = ifp->if_softc;
        struct ieee80211com *ic = &sc->sc_ic;
        int error;

        DPRINTF(1, "%s: %s\n", ifp->if_xname, __func__);

        /* if interface already runs stop it first */
        if (ifp->if_flags & IFF_RUNNING)
                malo_stop(ifp, 1);

        /* power on cardbus socket */
        if (sc->sc_enable)
                sc->sc_enable(sc);

        /* disable interrupts */
        malo_ctl_read4(sc, MALO_REG_A2H_INTERRUPT_CAUSE);
        malo_ctl_write4(sc, MALO_REG_A2H_INTERRUPT_CAUSE, 0);
        malo_ctl_write4(sc, MALO_REG_A2H_INTERRUPT_MASK, 0);
        malo_ctl_write4(sc, MALO_REG_A2H_INTERRUPT_STATUS_MASK, 0);

        /* load firmware */
        if ((error = malo_load_bootimg(sc)))
                goto fail;
        if ((error = malo_load_firmware(sc)))
                goto fail;

        /* enable interrupts */
        malo_ctl_write4(sc, MALO_REG_A2H_INTERRUPT_MASK, 0x1f);
        malo_ctl_barrier(sc, BUS_SPACE_BARRIER_WRITE);
        malo_ctl_write4(sc, MALO_REG_A2H_INTERRUPT_STATUS_MASK, 0x1f);
        malo_ctl_barrier(sc, BUS_SPACE_BARRIER_WRITE);

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

        /* select default channel */
        ic->ic_bss->ni_chan = ic->ic_ibss_chan;

        /* initialize hardware */
        if ((error = malo_cmd_set_channel(sc, ic->ic_bss->ni_chan))) {
                aprint_error_dev(sc->sc_dev, "setting channel failed!\n");
                goto fail;
        }
        if ((error = malo_cmd_set_antenna(sc, 1))) {
                aprint_error_dev(sc->sc_dev, "setting RX antenna failed!\n");
                goto fail;
        }
        if ((error = malo_cmd_set_antenna(sc, 2))) {
                aprint_error_dev(sc->sc_dev, "setting TX antenna failed!\n");
                goto fail;
        }
        if ((error = malo_cmd_set_radio(sc, 1, 5))) {
                aprint_error_dev(sc->sc_dev, "turn radio on failed!\n");
                goto fail;
        }
        if ((error = malo_cmd_set_txpower(sc, 100))) {
                aprint_error_dev(sc->sc_dev, "setting TX power failed!\n");
                goto fail;
        }
        if ((error = malo_cmd_set_rts(sc, IEEE80211_RTS_MAX))) {
                aprint_error_dev(sc->sc_dev, "setting RTS failed!\n");
                goto fail;
        }

        ifp->if_flags |= IFF_RUNNING;

        if (ic->ic_opmode != IEEE80211_M_MONITOR)
                /* start background scanning */
                ieee80211_new_state(ic, IEEE80211_S_SCAN, -1);
        else
                /* in monitor mode change directly into run state */
                ieee80211_new_state(ic, IEEE80211_S_RUN, -1);

        return (0);

fail:
        /* reset adapter */
        DPRINTF(1, "%s: malo_init failed, resetting card\n",
            device_xname(sc->sc_dev));
        malo_stop(ifp, 1);
        return (error);
}

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

        s = splnet();

        switch (cmd) {
        case SIOCSIFFLAGS:
                if ((error = ifioctl_common(ifp, cmd, data)) != 0)
                        break;
                if (ifp->if_flags & IFF_UP) {
                        if ((ifp->if_flags & IFF_RUNNING) == 0)
                                malo_init(ifp);
                } else {
                        if (ifp->if_flags & IFF_RUNNING)
                                malo_stop(ifp, 1);
                }
                break;
        case SIOCADDMULTI:
        case SIOCDELMULTI:
                if ((error = ether_ioctl(ifp, cmd, data)) == ENETRESET) {
                        /* setup multicast filter, etc */
                        error = 0;
                }
                break;
        case SIOCS80211CHANNEL:
                /* allow fast channel switching in monitor mode */
                error = ieee80211_ioctl(ic, cmd, data);
                if (error == ENETRESET &&
                    ic->ic_opmode == IEEE80211_M_MONITOR) {
                        if ((ifp->if_flags & (IFF_UP | IFF_RUNNING)) ==
                            (IFF_UP | IFF_RUNNING)) {
                                ic->ic_bss->ni_chan = ic->ic_ibss_chan;
                                malo_cmd_set_channel(sc, ic->ic_bss->ni_chan);
                        }
                        error = 0;
                }
                break;
        default:
                error = ieee80211_ioctl(ic, cmd, data);
                break;
        }

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

        splx(s);

        return (error);
}

static void
malo_start(struct ifnet *ifp)
{
        struct malo_softc *sc = ifp->if_softc;
        struct ieee80211com *ic = &sc->sc_ic;
        struct mbuf *m0;
        struct ether_header *eh;
        struct ieee80211_node *ni = NULL;

        DPRINTF(2, "%s: %s\n", device_xname(sc->sc_dev), __func__);

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

        for (;;) {
                IF_POLL(&ic->ic_mgtq, m0);
                if (m0 != NULL) {
                        if (sc->sc_txring.queued >= MALO_TX_RING_COUNT) {
                                ifp->if_flags |= IFF_OACTIVE;
                                break;
                        }
                        IF_DEQUEUE(&ic->ic_mgtq, m0);

                        ni = M_GETCTX(m0, struct ieee80211_node *);
                        M_CLEARCTX(m0);

                        bpf_mtap3(ic->ic_rawbpf, m0, BPF_D_OUT);

                        if (malo_tx_data(sc, m0, ni) != 0)
                                break;
                } else {
                        if (ic->ic_state != IEEE80211_S_RUN)
                                break;
                        IFQ_POLL(&ifp->if_snd, m0);
                        if (m0 == NULL)
                                break;
                        if (sc->sc_txring.queued >= MALO_TX_RING_COUNT - 1) {
                                ifp->if_flags |= IFF_OACTIVE;
                                break;
                        }

                        if (m0->m_len < sizeof (*eh) &&
                            (m0 = m_pullup(m0, sizeof (*eh))) == NULL) {
                                if_statinc(ifp, if_oerrors);
                                continue;
                        }
                        eh = mtod(m0, struct ether_header *);
                        ni = ieee80211_find_txnode(ic, eh->ether_dhost);
                        if (ni == NULL) {
                                m_freem(m0);
                                if_statinc(ifp, if_oerrors);
                                continue;
                        }

                        // XXX must I call ieee_classify at this point ?

                        IFQ_DEQUEUE(&ifp->if_snd, m0);
                        bpf_mtap(ifp, m0, BPF_D_OUT);

                        m0 = ieee80211_encap(ic, m0, ni);
                        if (m0 == NULL)
                                continue;
                        bpf_mtap3(ic->ic_rawbpf, m0, BPF_D_OUT);

                        if (malo_tx_data(sc, m0, ni) != 0) {
                                ieee80211_free_node(ni);
                                if_statinc(ifp, if_oerrors);
                                break;
                        }
                }
        }
}

void
malo_stop(struct ifnet* ifp, int disable)
{
        struct malo_softc *sc = ifp->if_softc;
        struct ieee80211com *ic = &sc->sc_ic;

        DPRINTF(1, "%s: %s\n", ifp->if_xname, __func__);

        /* reset adapter */
        if (ifp->if_flags & IFF_RUNNING)
                malo_ctl_write4(sc, MALO_REG_H2A_INTERRUPT_EVENTS, (1 << 15));

        /* device is not running anymore */
        ifp->if_flags &= ~(IFF_RUNNING | IFF_OACTIVE);

        /* change back to initial state */
        ieee80211_new_state(ic, IEEE80211_S_INIT, -1);

        /* reset RX / TX rings */
        malo_reset_tx_ring(sc, &sc->sc_txring);
        malo_reset_rx_ring(sc, &sc->sc_rxring);

        /* set initial rate */
        sc->sc_last_txrate = -1;

        /* power off cardbus socket */
        if (sc->sc_disable)
                sc->sc_disable(sc);
}

static void
malo_watchdog(struct ifnet *ifp)
{

}

static int
malo_newstate(struct ieee80211com *ic, enum ieee80211_state nstate, int arg)
{
        struct ifnet *ifp = ic->ic_ifp;
        struct malo_softc *sc = ifp->if_softc;
        enum ieee80211_state ostate;
        int rate;

        DPRINTF(2, "%s: %s\n", device_xname(sc->sc_dev), __func__);

        ostate = ic->ic_state;
        callout_stop(&sc->sc_scan_to);

        switch (nstate) {
        case IEEE80211_S_INIT:
                DPRINTF(1, "%s: newstate INIT\n", device_xname(sc->sc_dev));
                break;
        case IEEE80211_S_SCAN:
                DPRINTF(1, "%s: newstate SCAN\n", device_xname(sc->sc_dev));
                if (ostate == IEEE80211_S_INIT) {
                        if (malo_cmd_set_prescan(sc) != 0) {
                                DPRINTF(1, "%s: can't set prescan\n",
                                    device_xname(sc->sc_dev));
                        }
                } else {
                        malo_cmd_set_channel(sc, ic->ic_curchan);
                }
                callout_schedule(&sc->sc_scan_to, hz/2);
                break;
        case IEEE80211_S_AUTH:
                DPRINTF(1, "%s: newstate AUTH\n", device_xname(sc->sc_dev));
                malo_cmd_set_postscan(sc, ic->ic_myaddr, 1);
                malo_cmd_set_channel(sc, ic->ic_curchan);
                break;
        case IEEE80211_S_ASSOC:
                DPRINTF(1, "%s: newstate ASSOC\n", device_xname(sc->sc_dev));
                malo_cmd_set_channel(sc, ic->ic_curchan);
                if (ic->ic_flags & IEEE80211_F_SHPREAMBLE)
                        malo_cmd_set_radio(sc, 1, 3); /* short preamble */
                else
                        malo_cmd_set_radio(sc, 1, 1); /* long preamble */

                malo_cmd_set_aid(sc, ic->ic_bss->ni_bssid,
                    ic->ic_bss->ni_associd);

                if (ic->ic_fixed_rate == -1)
                        /* automatic rate adaption */
                        malo_cmd_set_rate(sc, 0);
                else {
                        /* fixed rate */
                        rate = malo_fix2rate(ic->ic_fixed_rate);
                        malo_cmd_set_rate(sc, rate);
                }

                malo_set_slot(sc);
                break;
        case IEEE80211_S_RUN:
                DPRINTF(1, "%s: newstate RUN\n", device_xname(sc->sc_dev));
                break;
        default:
                break;
        }

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

static void
malo_newassoc(struct ieee80211_node *ni, int isnew)
{
}

static struct ieee80211_node *
malo_node_alloc(struct ieee80211_node_table *nt)
{
        struct malo_node *wn;

        wn = malloc(sizeof(*wn), M_DEVBUF, M_NOWAIT | M_ZERO);
        if (wn == NULL)
                return (NULL);

        return ((struct ieee80211_node *)wn);
}

static int
malo_media_change(struct ifnet *ifp)
{
        int error;

        DPRINTF(1, "%s: %s\n", ifp->if_xname, __func__);

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

        if ((ifp->if_flags & (IFF_UP | IFF_RUNNING)) == (IFF_UP | IFF_RUNNING))
                malo_init(ifp);

        return (0);
}

static void
malo_media_status(struct ifnet *ifp, struct ifmediareq *imr)
{
        struct malo_softc *sc = ifp->if_softc;
        struct ieee80211com *ic = &sc->sc_ic;

        imr->ifm_status = IFM_AVALID;
        imr->ifm_active = IFM_IEEE80211;
        if (ic->ic_state == IEEE80211_S_RUN)
                imr->ifm_status |= IFM_ACTIVE;

        /* report last TX rate used by chip */
        imr->ifm_active |= ieee80211_rate2media(ic, sc->sc_last_txrate,
            ic->ic_curmode);

        switch (ic->ic_opmode) {
        case IEEE80211_M_STA:
                break;
        case IEEE80211_M_IBSS:
                imr->ifm_active |= IFM_IEEE80211_ADHOC;
                break;
        case IEEE80211_M_AHDEMO:
                break;
        case IEEE80211_M_HOSTAP:
                break;
        case IEEE80211_M_MONITOR:
                imr->ifm_active |= IFM_IEEE80211_MONITOR;
                break;
        default:
                break;
        }

        switch (ic->ic_curmode) {
                case IEEE80211_MODE_11B:
                        imr->ifm_active |= IFM_IEEE80211_11B;
                        break;
                case IEEE80211_MODE_11G:
                        imr->ifm_active |= IFM_IEEE80211_11G;
                        break;
        }
}

static int
malo_chip2rate(int chip_rate)
{
        switch (chip_rate) {
        /* CCK rates */
        case  0:        return (2);
        case  1:        return (4);
        case  2:        return (11);
        case  3:        return (22);

        /* OFDM rates */
        case  4:        return (0); /* reserved */
        case  5:        return (12);
        case  6:        return (18);
        case  7:        return (24);
        case  8:        return (36);
        case  9:        return (48);
        case 10:        return (72);
        case 11:        return (96);
        case 12:        return (108);

        /* no rate select yet or unknown rate */
        default:        return (-1);
        }
}

static int
malo_fix2rate(int fix_rate)
{
        switch (fix_rate) {
        /* CCK rates */
        case  0:        return (2);
        case  1:        return (4);
        case  2:        return (11);
        case  3:        return (22);

        /* OFDM rates */
        case  4:        return (12);
        case  5:        return (18);
        case  6:        return (24);
        case  7:        return (36);
        case  8:        return (48);
        case  9:        return (72);
        case 10:        return (96);
        case 11:        return (108);

        /* unknown rate: should not happen */
        default:        return (0);
        }
}

static void
malo_next_scan(void *arg)
{
        struct malo_softc *sc = arg;
        struct ieee80211com *ic = &sc->sc_ic;
        int s;

        DPRINTF(1, "%s: %s\n", sc->sc_if.if_xname, __func__);

        s = splnet();

        if (ic->ic_state == IEEE80211_S_SCAN)
                ieee80211_next_scan(ic);

        splx(s);
}

static void
malo_tx_intr(struct malo_softc *sc)
{
        struct ifnet *ifp = &sc->sc_if;
        struct malo_tx_desc *desc;
        struct malo_tx_data *data;
        struct malo_node *rn;
        int stat, s;

        DPRINTF(2, "%s: %s\n", device_xname(sc->sc_dev), __func__);

        s = splnet();

        stat = sc->sc_txring.stat;
        for (;;) {
                desc = &sc->sc_txring.desc[sc->sc_txring.stat];
                data = &sc->sc_txring.data[sc->sc_txring.stat];
                rn = (struct malo_node *)data->ni;

                /* check if TX descriptor is not owned by FW anymore */
                if ((le32toh(desc->status) & MALO_TXD_STATUS_FW_OWNED) ||
                    !(le32toh(data->softstat) & MALO_TXD_STATUS_FAILED_AGING))
                        break;

                /* if no frame has been sent, ignore */
                if (rn == NULL)
                        goto next;

                /* check TX state */
                switch (le32toh(desc->status) & MALO_TXD_STATUS_USED) {
                case MALO_TXD_STATUS_OK:
                        DPRINTF(2, "%s: data frame was sent successfully\n",
                            device_xname(sc->sc_dev));
                        if_statinc(ifp, if_opackets);
                        break;
                default:
                        DPRINTF(1, "%s: data frame sending error\n",
                            device_xname(sc->sc_dev));
                        if_statinc(ifp, if_oerrors);
                        break;
                }

                /* save last used TX rate */
                sc->sc_last_txrate = malo_chip2rate(desc->datarate);

                /* cleanup TX data and TX descriptor */
                bus_dmamap_sync(sc->sc_dmat, data->map, 0,
                    data->map->dm_mapsize, BUS_DMASYNC_POSTWRITE);
                bus_dmamap_unload(sc->sc_dmat, data->map);
                m_freem(data->m);
                ieee80211_free_node(data->ni);
                data->m = NULL;
                data->ni = NULL;
                data->softstat &= htole32(~0x80);
                desc->status = 0;
                desc->len = 0;

                DPRINTF(2, "%s: tx done idx=%u\n",
                    device_xname(sc->sc_dev), sc->sc_txring.stat);

                sc->sc_txring.queued--;
next:
                if (++sc->sc_txring.stat >= sc->sc_txring.count)
                        sc->sc_txring.stat = 0;
                if (sc->sc_txring.stat == stat)
                        break;
        }

        sc->sc_tx_timer = 0;
        ifp->if_flags &= ~IFF_OACTIVE;
        malo_start(ifp);

        splx(s);
}

static int
malo_tx_data(struct malo_softc *sc, struct mbuf *m0,
    struct ieee80211_node *ni)
{
        struct ieee80211com *ic = &sc->sc_ic;
        struct ifnet *ifp = &sc->sc_if;
        struct malo_tx_desc *desc;
        struct malo_tx_data *data;
        struct ieee80211_frame *wh;
        struct ieee80211_key *k;
        struct mbuf *mnew;
        int error;

        DPRINTF(2, "%s: %s\n", device_xname(sc->sc_dev), __func__);

        desc = &sc->sc_txring.desc[sc->sc_txring.cur];
        data = &sc->sc_txring.data[sc->sc_txring.cur];

        if (m0->m_len < sizeof(struct ieee80211_frame)) {
                m0 = m_pullup(m0, sizeof(struct ieee80211_frame));
                if (m0 == NULL) {
                        if_statinc(ifp, if_ierrors);
                        return (ENOBUFS);
                }
        }
        wh = mtod(m0, struct ieee80211_frame *);

        if (wh->i_fc[1] & IEEE80211_FC1_WEP) {
                k = ieee80211_crypto_encap(ic, ni, m0);
                if (k == NULL) {
                        m_freem(m0);
                        return ENOBUFS;
                }

                /* packet header may have moved, reset our local pointer */
                wh = mtod(m0, struct ieee80211_frame *);
        }

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

                tap->wt_flags = 0;
                tap->wt_chan_freq = htole16(ni->ni_chan->ic_freq);
                tap->wt_chan_flags = htole16(ni->ni_chan->ic_flags);
                tap->wt_rate = sc->sc_last_txrate;
                if (wh->i_fc[1] & IEEE80211_FC1_WEP)
                        tap->wt_flags |= IEEE80211_RADIOTAP_F_WEP;

                bpf_mtap2(sc->sc_drvbpf, tap, sc->sc_txtap_len, m0, BPF_D_OUT);
        }

        /*
         * inject FW specific fields into the 802.11 frame
         *
         *  2 bytes FW len (inject)
         * 24 bytes 802.11 frame header
         *  6 bytes addr4 (inject)
         *  n bytes 802.11 frame body
         *
         * For now copy all into a new mcluster.
         */
        MGETHDR(mnew, M_DONTWAIT, MT_DATA);
        if (mnew == NULL)
                return (ENOBUFS);
        MCLGET(mnew, M_DONTWAIT);
        if (!(mnew->m_flags & M_EXT)) {
                m_free(mnew);
                return (ENOBUFS);
        }

        *mtod(mnew, uint16_t *) = htole16(m0->m_pkthdr.len - 24); /* FW len */
        memmove(mtod(mnew, char*) + 2, wh, sizeof(*wh));
        memset(mtod(mnew, char*) + 26, 0, 6);
        m_copydata(m0, sizeof(*wh), m0->m_pkthdr.len - sizeof(*wh),
            mtod(mnew, char*) + 32);
        mnew->m_pkthdr.len = mnew->m_len = m0->m_pkthdr.len + 8;
        m_freem(m0);
        m0 = mnew;

        error = bus_dmamap_load_mbuf(sc->sc_dmat, data->map, m0,
            BUS_DMA_NOWAIT);
        if (error != 0) {
                aprint_error_dev(sc->sc_dev, "can't map mbuf (error %d)\n", error);
                m_freem(m0);
                return (error);
        }

        data->m = m0;
        data->ni = ni;
        data->softstat |= htole32(0x80);

        malo_tx_setup_desc(sc, desc, m0->m_pkthdr.len, 1,
            data->map->dm_segs, data->map->dm_nsegs);

        bus_dmamap_sync(sc->sc_dmat, data->map, 0, data->map->dm_mapsize,
            BUS_DMASYNC_PREWRITE);
        bus_dmamap_sync(sc->sc_dmat, sc->sc_txring.map,
            sc->sc_txring.cur * sizeof(struct malo_tx_desc),
            sizeof(struct malo_tx_desc), BUS_DMASYNC_PREWRITE);

        DPRINTF(2, "%s: sending frame, pktlen=%u, idx=%u\n",
            device_xname(sc->sc_dev), m0->m_pkthdr.len, sc->sc_txring.cur);

        sc->sc_txring.queued++;
        sc->sc_txring.cur = (sc->sc_txring.cur + 1) % MALO_TX_RING_COUNT;

        /* kick data TX */
        malo_ctl_write4(sc, MALO_REG_H2A_INTERRUPT_EVENTS, 1);
        malo_ctl_barrier(sc, BUS_SPACE_BARRIER_WRITE);

        return (0);
}

static void
malo_tx_setup_desc(struct malo_softc *sc, struct malo_tx_desc *desc,
    int len, int rate, const bus_dma_segment_t *segs, int nsegs)
{
        desc->len = htole16(segs[0].ds_len);
        desc->datarate = rate; /* 0 = mgmt frame, 1 = data frame */
        desc->physdata = htole32(segs[0].ds_addr);
        desc->status = htole32(MALO_TXD_STATUS_OK | MALO_TXD_STATUS_FW_OWNED);
}

static void
malo_rx_intr(struct malo_softc *sc)
{
        struct ieee80211com *ic = &sc->sc_ic;
        struct ifnet *ifp = &sc->sc_if;
        struct malo_rx_desc *desc;
        struct malo_rx_data *data;
        struct ieee80211_frame *wh;
        struct ieee80211_node *ni;
        struct mbuf *mnew, *m;
        uint32_t rxRdPtr, rxWrPtr;
        int error, i, s;

        rxRdPtr = malo_mem_read4(sc, sc->sc_RxPdRdPtr);
        rxWrPtr = malo_mem_read4(sc, sc->sc_RxPdWrPtr);

        for (i = 0; i < MALO_RX_RING_COUNT && rxRdPtr != rxWrPtr; i++) {
                desc = &sc->sc_rxring.desc[sc->sc_rxring.cur];
                data = &sc->sc_rxring.data[sc->sc_rxring.cur];

                bus_dmamap_sync(sc->sc_dmat, sc->sc_rxring.map,
                    sc->sc_rxring.cur * sizeof(struct malo_rx_desc),
                    sizeof(struct malo_rx_desc), BUS_DMASYNC_POSTREAD);

                DPRINTF(3, "%s: rx intr idx=%d, rxctrl=0x%02x, rssi=%d, "
                    "status=0x%02x, channel=%d, len=%d, res1=%02x, rate=%d, "
                    "physdata=0x%04x, physnext=0x%04x, qosctrl=%02x, res2=%d\n",
                    device_xname(sc->sc_dev),
                    sc->sc_rxring.cur, desc->rxctrl, desc->rssi, desc->status,
                    desc->channel, le16toh(desc->len), desc->reserved1,
                    desc->datarate, le32toh(desc->physdata),
                    le32toh(desc->physnext), desc->qosctrl, desc->reserved2);

                if ((desc->rxctrl & 0x80) == 0)
                        break;

                MGETHDR(mnew, M_DONTWAIT, MT_DATA);
                if (mnew == NULL) {
                        if_statinc(ifp, if_ierrors);
                        goto skip;
                }

                MCLGET(mnew, M_DONTWAIT);
                if (!(mnew->m_flags & M_EXT)) {
                        m_freem(mnew);
                        if_statinc(ifp, if_ierrors);
                        goto skip;
                }

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

                error = bus_dmamap_load(sc->sc_dmat, data->map,
                    mtod(mnew, void *), MCLBYTES, NULL, BUS_DMA_NOWAIT);
                if (error != 0) {
                        m_freem(mnew);

                        error = bus_dmamap_load(sc->sc_dmat, data->map,
                            mtod(data->m, void *), MCLBYTES, NULL,
                            BUS_DMA_NOWAIT);
                        if (error != 0) {
                                panic("%s: could not load old rx mbuf",
                                    device_xname(sc->sc_dev));
                        }
                        if_statinc(ifp, if_ierrors);
                        goto skip;
                }

                /*
                 * New mbuf mbuf successfully loaded
                 */
                m = data->m;
                data->m = mnew;
                desc->physdata = htole32(data->map->dm_segs->ds_addr);

                /* finalize mbuf */
                m_set_rcvif(m, ifp);
                m->m_pkthdr.len = m->m_len = le16toh(desc->len);

                /*
                 * cut out FW specific fields from the 802.11 frame
                 *
                 *  2 bytes FW len (cut out)
                 * 24 bytes 802.11 frame header
                 *  6 bytes addr4 (cut out)
                 *  n bytes 802.11 frame data
                 */
                memmove(m->m_data +6, m->m_data, 26);
                m_adj(m, 8);

                s = splnet();

                if (sc->sc_drvbpf != NULL) {
                        struct malo_rx_radiotap_hdr *tap = &sc->sc_rxtap;

                        tap->wr_flags = 0;
                        tap->wr_chan_freq =
                            htole16(ic->ic_bss->ni_chan->ic_freq);
                        tap->wr_chan_flags =
                            htole16(ic->ic_bss->ni_chan->ic_flags);

                        bpf_mtap2(sc->sc_drvbpf, tap, sc->sc_rxtap_len, m,
                            BPF_D_IN);
                }

                wh = mtod(m, struct ieee80211_frame *);
                ni = ieee80211_find_rxnode(ic, (struct ieee80211_frame_min *)wh);

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

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

                splx(s);

skip:
                desc->rxctrl = 0;
                rxRdPtr = le32toh(desc->physnext);

                bus_dmamap_sync(sc->sc_dmat, sc->sc_rxring.map,
                    sc->sc_rxring.cur * sizeof(struct malo_rx_desc),
                    sizeof(struct malo_rx_desc), BUS_DMASYNC_PREWRITE);

                sc->sc_rxring.cur = (sc->sc_rxring.cur + 1) %
                    MALO_RX_RING_COUNT;
        }

        malo_mem_write4(sc, sc->sc_RxPdRdPtr, rxRdPtr);
}

static int
malo_get_firmware(struct malo_softc *sc, const char *name,
                                  uint8_t** firmware_image, size_t* size)
{
        firmware_handle_t fw;
        int error;


        /* load firmware image from disk */
        if ((error = firmware_open("malo", name, &fw)) != 0) {
                aprint_error_dev(sc->sc_dev, "could not read firmware file\n");
                return error;
        }

        *size = firmware_get_size(fw);

        *firmware_image = firmware_malloc(*size);
        if (*firmware_image == NULL) {
                aprint_error_dev(sc->sc_dev, "not enough memory to stock firmware\n");
                error = ENOMEM;
                goto fail1;
        }

        if ((error = firmware_read(fw, 0, *firmware_image, *size)) != 0) {
                aprint_error_dev(sc->sc_dev, "can't get firmware\n");
                goto fail2;
        }

        firmware_close(fw);

        return 0;
fail2:
        firmware_free(*firmware_image, *size);
fail1:
        firmware_close(fw);
        return error;
}

static int
malo_load_bootimg(struct malo_softc *sc)
{
        const char *name = "malo8335-h";
        uint8_t *ucode;
        size_t size;
        int error, i;

        /* load boot firmware */
        if ((error = malo_get_firmware(sc, name, &ucode, &size)) != 0) {
                aprint_error_dev(sc->sc_dev, "error %d, could not read firmware %s\n",
                    error, name);
                return (EIO);
        }

        /*
         * It seems we are putting this code directly onto the stack of
         * the ARM cpu. I don't know why we need to instruct the DMA
         * engine to move the code. This is a big riddle without docu.
         */
        DPRINTF(1, "%s: loading boot firmware\n", device_xname(sc->sc_dev));
        malo_mem_write2(sc, 0xbef8, 0x001);
        malo_mem_write2(sc, 0xbefa, size);
        malo_mem_write4(sc, 0xbefc, 0);

        bus_space_write_region_1(sc->sc_mem1_bt, sc->sc_mem1_bh, 0xbf00,
            ucode, size);

        firmware_free(ucode, size);

        /*
         * we loaded the firmware into card memory now tell the CPU
         * to fetch the code and execute it. The memory mapped via the
         * first bar is internally mapped to 0xc0000000.
         */
        malo_send_cmd(sc, 0xc000bef8);

        /* wait for the device to go into FW loading mode */
        for (i = 0; i < 10; i++) {
                delay(50);
                malo_ctl_barrier(sc, BUS_SPACE_BARRIER_READ);
                if (malo_ctl_read4(sc, 0x0c14) == 0x5)
                        break;
        }
        if (i == 10) {
                aprint_error_dev(sc->sc_dev, "timeout at boot firmware load!\n");
                return (ETIMEDOUT);
        }

        /* tell the card we're done and... */
        malo_mem_write2(sc, 0xbef8, 0x001);
        malo_mem_write2(sc, 0xbefa, 0);
        malo_mem_write4(sc, 0xbefc, 0);
        malo_send_cmd(sc, 0xc000bef8);

        DPRINTF(1, "%s: boot firmware loaded\n", device_xname(sc->sc_dev));

        return (0);
}


static int
malo_load_firmware(struct malo_softc *sc)
{
        struct malo_cmdheader *hdr;
        const char *name = "malo8335-m";
        void *data;
        uint8_t *ucode;
        size_t size, count, bsize;
        int i, sn, error;

        /* load real firmware now */
        if ((error = malo_get_firmware(sc, name, &ucode, &size)) != 0) {
                aprint_error_dev(sc->sc_dev, "error %d, could not read firmware %s\n",
                    error, name);
                return (EIO);
        }

        DPRINTF(1, "%s: uploading firmware\n", device_xname(sc->sc_dev));

        hdr = sc->sc_cmd_mem;
        data = hdr + 1;
        sn = 1;
        for (count = 0; count < size; count += bsize) {
                bsize = MIN(256, size - count);

                hdr->cmd = htole16(0x0001);
                hdr->size = htole16(bsize);
                hdr->seqnum = htole16(sn++);
                hdr->result = 0;

                memcpy(data, ucode + count, bsize);

                bus_dmamap_sync(sc->sc_dmat, sc->sc_cmd_dmam, 0, PAGE_SIZE,
                    BUS_DMASYNC_PREWRITE);
                malo_send_cmd(sc, sc->sc_cmd_dmaaddr);
                bus_dmamap_sync(sc->sc_dmat, sc->sc_cmd_dmam, 0, PAGE_SIZE,
                    BUS_DMASYNC_POSTWRITE);
                delay(500);
        }
        firmware_free(ucode, size);

        DPRINTF(1, "%s: firmware upload finished\n", device_xname(sc->sc_dev));

        /*
         * send a command with size 0 to tell that the firmware has been
         * uploaded
         */
        hdr->cmd = htole16(0x0001);
        hdr->size = 0;
        hdr->seqnum = htole16(sn++);
        hdr->result = 0;

        bus_dmamap_sync(sc->sc_dmat, sc->sc_cmd_dmam, 0, PAGE_SIZE,
            BUS_DMASYNC_PREWRITE);
        malo_send_cmd(sc, sc->sc_cmd_dmaaddr);
        bus_dmamap_sync(sc->sc_dmat, sc->sc_cmd_dmam, 0, PAGE_SIZE,
            BUS_DMASYNC_POSTWRITE);
        delay(100);

        DPRINTF(1, "%s: loading firmware\n", device_xname(sc->sc_dev));

        /* wait until firmware has been loaded */
        for (i = 0; i < 200; i++) {
                malo_ctl_write4(sc, 0x0c10, 0x5a);
                delay(500);
                malo_ctl_barrier(sc, BUS_SPACE_BARRIER_WRITE |
                     BUS_SPACE_BARRIER_READ);
                if (malo_ctl_read4(sc, 0x0c14) == 0xf0f1f2f4)
                        break;
        }
        if (i == 200) {
                aprint_error_dev(sc->sc_dev, "timeout at firmware load!\n");
                return (ETIMEDOUT);
        }

        DPRINTF(1, "%s: firmware loaded\n", device_xname(sc->sc_dev));

        return (0);
}

static int
malo_set_slot(struct malo_softc *sc)
{
        struct ieee80211com *ic = &sc->sc_ic;

        if (ic->ic_flags & IEEE80211_F_SHSLOT) {
                /* set short slot */
                if (malo_cmd_set_slot(sc, 1)) {
                        aprint_error_dev(sc->sc_dev, "setting short slot failed\n");
                        return (ENXIO);
                }
        } else {
                /* set long slot */
                if (malo_cmd_set_slot(sc, 0)) {
                        aprint_error_dev(sc->sc_dev, "setting long slot failed\n");
                        return (ENXIO);
                }
        }

        return (0);
}

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

        malo_set_slot(sc);

        if (ic->ic_opmode == IEEE80211_M_HOSTAP) {
                /* TODO */
        }
}

#ifdef MALO_DEBUG
static void
malo_hexdump(void *buf, int len)
{
        u_char b[16];
        int i, j, l;

        for (i = 0; i < len; i += l) {
                printf("%4i:", i);
                l = uimin(sizeof(b), len - i);
                memcpy(b, (char*)buf + i, l);
                
                for (j = 0; j < sizeof(b); j++) {
                        if (j % 2 == 0)
                                printf(" ");
                        if (j % 8 == 0)
                                printf(" ");
                        if (j < l)
                                printf("%02x", (int)b[j]);
                        else
                                printf("  ");
                }
                printf("  |");
                for (j = 0; j < l; j++) {
                        if (b[j] >= 0x20 && b[j] <= 0x7e)
                                printf("%c", b[j]);
                        else
                                printf(".");
                }
                printf("|\n");
        }
}
#endif

static const char *
malo_cmd_string(uint16_t cmd)
{
        int i;
        static char cmd_buf[16];
        static const struct {
                uint16_t         cmd_code;
                const char              *cmd_string;
        } cmds[] = {
                { MALO_CMD_GET_HW_SPEC,         "GetHwSpecifications"   },
                { MALO_CMD_SET_RADIO,           "SetRadio"              },
                { MALO_CMD_SET_AID,             "SetAid"                },
                { MALO_CMD_SET_TXPOWER,         "SetTxPower"            },
                { MALO_CMD_SET_ANTENNA,         "SetAntenna"            },
                { MALO_CMD_SET_PRESCAN,         "SetPrescan"            },
                { MALO_CMD_SET_POSTSCAN,        "SetPostscan"           },
                { MALO_CMD_SET_RATE,            "SetRate"               },
                { MALO_CMD_SET_CHANNEL,         "SetChannel"            },
                { MALO_CMD_SET_RTS,             "SetRTS"                },
                { MALO_CMD_SET_SLOT,            "SetSlot"               },
        };

        for (i = 0; i < sizeof(cmds) / sizeof(cmds[0]); i++)
                if ((le16toh(cmd) & 0x7fff) == cmds[i].cmd_code)
                        return (cmds[i].cmd_string);

        snprintf(cmd_buf, sizeof(cmd_buf), "unknown %#x", cmd);
        return (cmd_buf);
}

static const char *
malo_cmd_string_result(uint16_t result)
{
        int i;
        static const struct {
                uint16_t         result_code;
                const char              *result_string;
        } results[] = {
                { MALO_CMD_RESULT_OK,           "OK"            },
                { MALO_CMD_RESULT_ERROR,        "general error" },
                { MALO_CMD_RESULT_NOSUPPORT,    "not supported" },
                { MALO_CMD_RESULT_PENDING,      "pending"       },
                { MALO_CMD_RESULT_BUSY,         "ignored"       },
                { MALO_CMD_RESULT_PARTIALDATA,  "incomplete"    },
        };

        for (i = 0; i < sizeof(results) / sizeof(results[0]); i++)
                if (le16toh(result) == results[i].result_code)
                        return (results[i].result_string);

        return ("unknown");
}

static int
malo_cmd_get_spec(struct malo_softc *sc)
{
        struct malo_cmdheader *hdr = sc->sc_cmd_mem;
        struct malo_hw_spec *spec;

        hdr->cmd = htole16(MALO_CMD_GET_HW_SPEC);
        hdr->size = htole16(sizeof(*hdr) + sizeof(*spec));
        hdr->seqnum = htole16(42);      /* the one and only */
        hdr->result = 0;
        spec = (struct malo_hw_spec *)(hdr + 1);

        memset(spec, 0, sizeof(*spec));
        memset(spec->PermanentAddress, 0xff, ETHER_ADDR_LEN);
        spec->CookiePtr = htole32(sc->sc_cookie_dmaaddr);

        bus_dmamap_sync(sc->sc_dmat, sc->sc_cmd_dmam, 0, PAGE_SIZE,
            BUS_DMASYNC_PREWRITE|BUS_DMASYNC_PREREAD);

        if (malo_send_cmd_dma(sc, sc->sc_cmd_dmaaddr) != 0)
                return (ETIMEDOUT);

        /* get the data from the buffer */
        DPRINTF(1, "%s: get_hw_spec: V%x R%x, #WCB %d, #Mcast %d, Regcode %d, "
            "#Ant %d\n", device_xname(sc->sc_dev), htole16(spec->HwVersion),
            htole32(spec->FWReleaseNumber), htole16(spec->NumOfWCB),
            htole16(spec->NumOfMCastAdr), htole16(spec->RegionCode),
            htole16(spec->NumberOfAntenna));

        /* tell the DMA engine where our rings are */
        malo_mem_write4(sc, le32toh(spec->RxPdRdPtr) & 0xffff,
            sc->sc_rxring.physaddr);
        malo_mem_write4(sc, le32toh(spec->RxPdWrPtr) & 0xffff,
            sc->sc_rxring.physaddr);
        malo_mem_write4(sc, le32toh(spec->WcbBase0) & 0xffff,
            sc->sc_txring.physaddr);

        /* save DMA RX pointers for later use */
        sc->sc_RxPdRdPtr = le32toh(spec->RxPdRdPtr) & 0xffff;
        sc->sc_RxPdWrPtr = le32toh(spec->RxPdWrPtr) & 0xffff;

        return (0);
}

static int
malo_cmd_set_prescan(struct malo_softc *sc)
{
        struct malo_cmdheader *hdr = sc->sc_cmd_mem;

        hdr->cmd = htole16(MALO_CMD_SET_PRESCAN);
        hdr->size = htole16(sizeof(*hdr));
        hdr->seqnum = 1;
        hdr->result = 0;

        bus_dmamap_sync(sc->sc_dmat, sc->sc_cmd_dmam, 0, PAGE_SIZE,
            BUS_DMASYNC_PREWRITE | BUS_DMASYNC_PREREAD);

        return (malo_send_cmd_dma(sc, sc->sc_cmd_dmaaddr));
}

static int
malo_cmd_set_postscan(struct malo_softc *sc, uint8_t *macaddr, uint8_t ibsson)
{
        struct malo_cmdheader *hdr = sc->sc_cmd_mem;
        struct malo_cmd_postscan *body;

        hdr->cmd = htole16(MALO_CMD_SET_POSTSCAN);
        hdr->size = htole16(sizeof(*hdr) + sizeof(*body));
        hdr->seqnum = 1;
        hdr->result = 0;
        body = (struct malo_cmd_postscan *)(hdr + 1);

        memset(body, 0, sizeof(*body));
        memcpy(&body->bssid, macaddr, ETHER_ADDR_LEN);
        body->isibss = htole32(ibsson);

        bus_dmamap_sync(sc->sc_dmat, sc->sc_cmd_dmam, 0, PAGE_SIZE,
            BUS_DMASYNC_PREWRITE | BUS_DMASYNC_PREREAD);

        return (malo_send_cmd_dma(sc, sc->sc_cmd_dmaaddr));
}

static int
malo_cmd_set_channel(struct malo_softc *sc, struct ieee80211_channel* chan)
{
        struct malo_cmdheader *hdr = sc->sc_cmd_mem;
        struct ieee80211com *ic = &sc->sc_ic;
        struct malo_cmd_channel *body;
        uint8_t channel;

        channel = ieee80211_chan2ieee(ic, chan);

        hdr->cmd = htole16(MALO_CMD_SET_CHANNEL);
        hdr->size = htole16(sizeof(*hdr) + sizeof(*body));
        hdr->seqnum = 1;
        hdr->result = 0;
        body = (struct malo_cmd_channel *)(hdr + 1);

        memset(body, 0, sizeof(*body));
        body->action = htole16(1);
        body->channel = channel;

        bus_dmamap_sync(sc->sc_dmat, sc->sc_cmd_dmam, 0, PAGE_SIZE,
            BUS_DMASYNC_PREWRITE | BUS_DMASYNC_PREREAD);

        return (malo_send_cmd_dma(sc, sc->sc_cmd_dmaaddr));
}

static int
malo_cmd_set_antenna(struct malo_softc *sc, uint16_t antenna)
{
        struct malo_cmdheader *hdr = sc->sc_cmd_mem;
        struct malo_cmd_antenna *body;

        hdr->cmd = htole16(MALO_CMD_SET_ANTENNA);
        hdr->size = htole16(sizeof(*hdr) + sizeof(*body));
        hdr->seqnum = 1;
        hdr->result = 0;
        body = (struct malo_cmd_antenna *)(hdr + 1);

        memset(body, 0, sizeof(*body));
        body->action = htole16(antenna);
        if (antenna == 1)
                body->mode = htole16(0xffff);
        else
                body->mode = htole16(2);

        bus_dmamap_sync(sc->sc_dmat, sc->sc_cmd_dmam, 0, PAGE_SIZE,
            BUS_DMASYNC_PREWRITE | BUS_DMASYNC_PREREAD);

        return (malo_send_cmd_dma(sc, sc->sc_cmd_dmaaddr));
}

static int
malo_cmd_set_radio(struct malo_softc *sc, uint16_t enable,
    uint16_t preamble_mode)
{
        struct malo_cmdheader *hdr = sc->sc_cmd_mem;
        struct malo_cmd_radio *body;

        hdr->cmd = htole16(MALO_CMD_SET_RADIO);
        hdr->size = htole16(sizeof(*hdr) + sizeof(*body));
        hdr->seqnum = 1;
        hdr->result = 0;
        body = (struct malo_cmd_radio *)(hdr + 1);

        memset(body, 0, sizeof(*body));
        body->action = htole16(1);
        body->preamble_mode = htole16(preamble_mode);
        body->enable = htole16(enable);

        bus_dmamap_sync(sc->sc_dmat, sc->sc_cmd_dmam, 0, PAGE_SIZE,
            BUS_DMASYNC_PREWRITE | BUS_DMASYNC_PREREAD);

        return (malo_send_cmd_dma(sc, sc->sc_cmd_dmaaddr));
}

static int
malo_cmd_set_aid(struct malo_softc *sc, uint8_t *bssid, uint16_t associd)
{
        struct malo_cmdheader *hdr = sc->sc_cmd_mem;
        struct malo_cmd_aid *body;

        hdr->cmd = htole16(MALO_CMD_SET_AID);
        hdr->size = htole16(sizeof(*hdr) + sizeof(*body));
        hdr->seqnum = 1;
        hdr->result = 0;
        body = (struct malo_cmd_aid *)(hdr + 1);

        memset(body, 0, sizeof(*body));
        body->associd = htole16(associd);
        memcpy(&body->macaddr[0], bssid, IEEE80211_ADDR_LEN);

        bus_dmamap_sync(sc->sc_dmat, sc->sc_cmd_dmam, 0, PAGE_SIZE,
            BUS_DMASYNC_PREWRITE | BUS_DMASYNC_PREREAD);

        return (malo_send_cmd_dma(sc, sc->sc_cmd_dmaaddr));
}

static int
malo_cmd_set_txpower(struct malo_softc *sc, unsigned int powerlevel)
{
        struct malo_cmdheader *hdr = sc->sc_cmd_mem;
        struct malo_cmd_txpower *body;

        hdr->cmd = htole16(MALO_CMD_SET_TXPOWER);
        hdr->size = htole16(sizeof(*hdr) + sizeof(*body));
        hdr->seqnum = 1;
        hdr->result = 0;
        body = (struct malo_cmd_txpower *)(hdr + 1);

        memset(body, 0, sizeof(*body));
        body->action = htole16(1);
        if (powerlevel < 30)
                body->supportpowerlvl = htole16(5);     /* LOW */
        else if (powerlevel < 60)
                body->supportpowerlvl = htole16(10);    /* MEDIUM */
        else
                body->supportpowerlvl = htole16(15);    /* HIGH */

        bus_dmamap_sync(sc->sc_dmat, sc->sc_cmd_dmam, 0, PAGE_SIZE,
            BUS_DMASYNC_PREWRITE | BUS_DMASYNC_PREREAD);

        return (malo_send_cmd_dma(sc, sc->sc_cmd_dmaaddr));
}

static int
malo_cmd_set_rts(struct malo_softc *sc, uint32_t threshold)
{
        struct malo_cmdheader *hdr = sc->sc_cmd_mem;
        struct malo_cmd_rts *body;

        hdr->cmd = htole16(MALO_CMD_SET_RTS);
        hdr->size = htole16(sizeof(*hdr) + sizeof(*body));
        hdr->seqnum = 1;
        hdr->result = 0;
        body = (struct malo_cmd_rts *)(hdr + 1);

        memset(body, 0, sizeof(*body));
        body->action = htole16(1);
        body->threshold = htole32(threshold);

        bus_dmamap_sync(sc->sc_dmat, sc->sc_cmd_dmam, 0, PAGE_SIZE,
            BUS_DMASYNC_PREWRITE | BUS_DMASYNC_PREREAD);

        return (malo_send_cmd_dma(sc, sc->sc_cmd_dmaaddr));
}

static int
malo_cmd_set_slot(struct malo_softc *sc, uint8_t slot)
{
        struct malo_cmdheader *hdr = sc->sc_cmd_mem;
        struct malo_cmd_slot *body;

        hdr->cmd = htole16(MALO_CMD_SET_SLOT);
        hdr->size = htole16(sizeof(*hdr) + sizeof(*body));
        hdr->seqnum = 1;
        hdr->result = 0;
        body = (struct malo_cmd_slot *)(hdr + 1);

        memset(body, 0, sizeof(*body));
        body->action = htole16(1);
        body->slot = slot;

        bus_dmamap_sync(sc->sc_dmat, sc->sc_cmd_dmam, 0, PAGE_SIZE,
            BUS_DMASYNC_PREWRITE | BUS_DMASYNC_PREREAD);

        return (malo_send_cmd_dma(sc, sc->sc_cmd_dmaaddr));
}

static int
malo_cmd_set_rate(struct malo_softc *sc, uint8_t rate)
{
        struct ieee80211com *ic = &sc->sc_ic;
        struct malo_cmdheader *hdr = sc->sc_cmd_mem;
        struct malo_cmd_rate *body;
        int i;

        hdr->cmd = htole16(MALO_CMD_SET_RATE);
        hdr->size = htole16(sizeof(*hdr) + sizeof(*body));
        hdr->seqnum = 1;
        hdr->result = 0;
        body = (struct malo_cmd_rate *)(hdr + 1);

        memset(body, 0,sizeof(*body));

        if (ic->ic_opmode == IEEE80211_M_HOSTAP) {
                /* TODO */
        } else
        {
                body->aprates[0] = 2;
                body->aprates[1] = 4;
                body->aprates[2] = 11;
                body->aprates[3] = 22;
                if (ic->ic_curmode == IEEE80211_MODE_11G) {
                        body->aprates[4] = 0;
                        body->aprates[5] = 12;
                        body->aprates[6] = 18;
                        body->aprates[7] = 24;
                        body->aprates[8] = 36;
                        body->aprates[9] = 48;
                        body->aprates[10] = 72;
                        body->aprates[11] = 96;
                        body->aprates[12] = 108;
                }
        }

        if (rate != 0) {
                /* fixed rate */
                for (i = 0; i < 13; i++) {
                        if (body->aprates[i] == rate) {
                                body->rateindex = i;
                                body->dataratetype = 1;
                                break;
                        }
                }
        }

        bus_dmamap_sync(sc->sc_dmat, sc->sc_cmd_dmam, 0, PAGE_SIZE,
            BUS_DMASYNC_PREWRITE | BUS_DMASYNC_PREREAD);

        return (malo_send_cmd_dma(sc, sc->sc_cmd_dmaaddr));
}

static void
malo_cmd_response(struct malo_softc *sc)
{
        struct malo_cmdheader *hdr = sc->sc_cmd_mem;

        if (le16toh(hdr->result) != MALO_CMD_RESULT_OK) {
                aprint_error_dev(sc->sc_dev, "firmware cmd %s failed with %s\n",
                    malo_cmd_string(hdr->cmd),
                    malo_cmd_string_result(hdr->result));
        }

#ifdef MALO_DEBUG
        aprint_error_dev(sc->sc_dev, "cmd answer for %s=%s\n",
            malo_cmd_string(hdr->cmd),
            malo_cmd_string_result(hdr->result));

        if (malo_d > 2)
                malo_hexdump(hdr, le16toh(hdr->size));
#endif
}