/*-
 * SPDX-License-Identifier: BSD-2-Clause
 *
 * Copyright (c) 2004-2006
 *      Damien Bergamini <damien.bergamini@free.fr>. All rights reserved.
 * Copyright (c) 2006 Sam Leffler, Errno Consulting
 * Copyright (c) 2007 Andrew Thompson <thompsa@FreeBSD.org>
 *
 * 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 unmodified, this list of conditions, and the following
 *    disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
 */

#include <sys/cdefs.h>
/*-
 * Intel(R) PRO/Wireless 2100 MiniPCI driver
 * http://www.intel.com/network/connectivity/products/wireless/prowireless_mobile.htm
 */

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

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

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

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

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

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

#include <dev/ipw/if_ipwreg.h>
#include <dev/ipw/if_ipwvar.h>

#define IPW_DEBUG
#ifdef IPW_DEBUG
#define DPRINTF(x)      do { if (ipw_debug > 0) printf x; } while (0)
#define DPRINTFN(n, x)  do { if (ipw_debug >= (n)) printf x; } while (0)
int ipw_debug = 0;
SYSCTL_INT(_debug, OID_AUTO, ipw, CTLFLAG_RW, &ipw_debug, 0, "ipw debug level");
#else
#define DPRINTF(x)
#define DPRINTFN(n, x)
#endif

MODULE_DEPEND(ipw, pci,  1, 1, 1);
MODULE_DEPEND(ipw, wlan, 1, 1, 1);
MODULE_DEPEND(ipw, firmware, 1, 1, 1);

struct ipw_ident {
        uint16_t        vendor;
        uint16_t        device;
        const char      *name;
};

static const struct ipw_ident ipw_ident_table[] = {
        { 0x8086, 0x1043, "Intel(R) PRO/Wireless 2100 MiniPCI" },

        { 0, 0, NULL }
};

static struct ieee80211vap *ipw_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     ipw_vap_delete(struct ieee80211vap *);
static int      ipw_dma_alloc(struct ipw_softc *);
static void     ipw_release(struct ipw_softc *);
static void     ipw_media_status(if_t, struct ifmediareq *);
static int      ipw_newstate(struct ieee80211vap *, enum ieee80211_state, int);
static uint16_t ipw_read_prom_word(struct ipw_softc *, uint8_t);
static uint16_t ipw_read_chanmask(struct ipw_softc *);
static void     ipw_rx_cmd_intr(struct ipw_softc *, struct ipw_soft_buf *);
static void     ipw_rx_newstate_intr(struct ipw_softc *, struct ipw_soft_buf *);
static void     ipw_rx_data_intr(struct ipw_softc *, struct ipw_status *,
                    struct ipw_soft_bd *, struct ipw_soft_buf *);
static void     ipw_rx_intr(struct ipw_softc *);
static void     ipw_release_sbd(struct ipw_softc *, struct ipw_soft_bd *);
static void     ipw_tx_intr(struct ipw_softc *);
static void     ipw_intr(void *);
static void     ipw_dma_map_addr(void *, bus_dma_segment_t *, int, int);
static const char * ipw_cmdname(int);
static int      ipw_cmd(struct ipw_softc *, uint32_t, void *, uint32_t);
static int      ipw_tx_start(struct ipw_softc *, struct mbuf *,
                    struct ieee80211_node *);
static int      ipw_raw_xmit(struct ieee80211_node *, struct mbuf *,
                    const struct ieee80211_bpf_params *);
static int      ipw_transmit(struct ieee80211com *, struct mbuf *);
static void     ipw_start(struct ipw_softc *);
static void     ipw_watchdog(void *);
static void     ipw_parent(struct ieee80211com *);
static void     ipw_stop_master(struct ipw_softc *);
static int      ipw_enable(struct ipw_softc *);
static int      ipw_disable(struct ipw_softc *);
static int      ipw_reset(struct ipw_softc *);
static int      ipw_load_ucode(struct ipw_softc *, const char *, int);
static int      ipw_load_firmware(struct ipw_softc *, const char *, int);
static int      ipw_config(struct ipw_softc *);
static void     ipw_assoc(struct ieee80211com *, struct ieee80211vap *);
static void     ipw_disassoc(struct ieee80211com *, struct ieee80211vap *);
static void     ipw_init_task(void *, int);
static void     ipw_init(void *);
static void     ipw_init_locked(struct ipw_softc *);
static void     ipw_stop(void *);
static void     ipw_stop_locked(struct ipw_softc *);
static int      ipw_sysctl_stats(SYSCTL_HANDLER_ARGS);
static int      ipw_sysctl_radio(SYSCTL_HANDLER_ARGS);
static uint32_t ipw_read_table1(struct ipw_softc *, uint32_t);
static void     ipw_write_table1(struct ipw_softc *, uint32_t, uint32_t);
#if 0
static int      ipw_read_table2(struct ipw_softc *, uint32_t, void *,
                    uint32_t *);
static void     ipw_read_mem_1(struct ipw_softc *, bus_size_t, uint8_t *,
                    bus_size_t);
#endif
static void     ipw_write_mem_1(struct ipw_softc *, bus_size_t,
                    const uint8_t *, bus_size_t);
static int      ipw_scan(struct ipw_softc *);
static void     ipw_scan_start(struct ieee80211com *);
static void     ipw_scan_end(struct ieee80211com *);
static void     ipw_getradiocaps(struct ieee80211com *, int, int *,
                    struct ieee80211_channel[]);
static void     ipw_set_channel(struct ieee80211com *);
static void     ipw_scan_curchan(struct ieee80211_scan_state *,
                    unsigned long maxdwell);
static void     ipw_scan_mindwell(struct ieee80211_scan_state *);

static int ipw_probe(device_t);
static int ipw_attach(device_t);
static int ipw_detach(device_t);
static int ipw_shutdown(device_t);
static int ipw_suspend(device_t);
static int ipw_resume(device_t);

static device_method_t ipw_methods[] = {
        /* Device interface */
        DEVMETHOD(device_probe,         ipw_probe),
        DEVMETHOD(device_attach,        ipw_attach),
        DEVMETHOD(device_detach,        ipw_detach),
        DEVMETHOD(device_shutdown,      ipw_shutdown),
        DEVMETHOD(device_suspend,       ipw_suspend),
        DEVMETHOD(device_resume,        ipw_resume),

        DEVMETHOD_END
};

static driver_t ipw_driver = {
        "ipw",
        ipw_methods,
        sizeof (struct ipw_softc)
};

DRIVER_MODULE(ipw, pci, ipw_driver, NULL, NULL);
MODULE_PNP_INFO("U16:vendor;U16:device;D:#", pci, ipw, ipw_ident_table,
    nitems(ipw_ident_table) - 1);

MODULE_VERSION(ipw, 1);

static int
ipw_probe(device_t dev)
{
        const struct ipw_ident *ident;

        for (ident = ipw_ident_table; ident->name != NULL; ident++) {
                if (pci_get_vendor(dev) == ident->vendor &&
                    pci_get_device(dev) == ident->device) {
                        device_set_desc(dev, ident->name);
                        return (BUS_PROBE_DEFAULT);
                }
        }
        return ENXIO;
}

/* Base Address Register */
static int
ipw_attach(device_t dev)
{
        struct ipw_softc *sc = device_get_softc(dev);
        struct ieee80211com *ic = &sc->sc_ic;
        uint16_t val;
        int error, i;

        sc->sc_dev = dev;

        mtx_init(&sc->sc_mtx, device_get_nameunit(dev), MTX_NETWORK_LOCK,
            MTX_DEF | MTX_RECURSE);
        mbufq_init(&sc->sc_snd, ifqmaxlen);
        TASK_INIT(&sc->sc_init_task, 0, ipw_init_task, sc);
        callout_init_mtx(&sc->sc_wdtimer, &sc->sc_mtx, 0);

        pci_write_config(dev, 0x41, 0, 1);

        /* enable bus-mastering */
        pci_enable_busmaster(dev);

        i = PCIR_BAR(0);
        sc->mem = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &i, RF_ACTIVE);
        if (sc->mem == NULL) {
                device_printf(dev, "could not allocate memory resource\n");
                goto fail;
        }

        sc->sc_st = rman_get_bustag(sc->mem);
        sc->sc_sh = rman_get_bushandle(sc->mem);

        i = 0;
        sc->irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &i,
            RF_ACTIVE | RF_SHAREABLE);
        if (sc->irq == NULL) {
                device_printf(dev, "could not allocate interrupt resource\n");
                goto fail1;
        }

        if (ipw_reset(sc) != 0) {
                device_printf(dev, "could not reset adapter\n");
                goto fail2;
        }

        if (ipw_dma_alloc(sc) != 0) {
                device_printf(dev, "could not allocate DMA resources\n");
                goto fail2;
        }

        ic->ic_softc = sc;
        ic->ic_name = device_get_nameunit(dev);
        ic->ic_opmode = IEEE80211_M_STA;
        ic->ic_phytype = IEEE80211_T_DS;

        /* set device capabilities */
        ic->ic_caps =
                  IEEE80211_C_STA               /* station mode supported */
                | IEEE80211_C_IBSS              /* IBSS mode supported */
                | IEEE80211_C_MONITOR           /* monitor mode supported */
                | IEEE80211_C_PMGT              /* power save supported */
                | IEEE80211_C_SHPREAMBLE        /* short preamble supported */
                | IEEE80211_C_WPA               /* 802.11i supported */
                ;

        ic->ic_flags_ext |= IEEE80211_FEXT_SEQNO_OFFLOAD;

        /* read MAC address from EEPROM */
        val = ipw_read_prom_word(sc, IPW_EEPROM_MAC + 0);
        ic->ic_macaddr[0] = val >> 8;
        ic->ic_macaddr[1] = val & 0xff;
        val = ipw_read_prom_word(sc, IPW_EEPROM_MAC + 1);
        ic->ic_macaddr[2] = val >> 8;
        ic->ic_macaddr[3] = val & 0xff;
        val = ipw_read_prom_word(sc, IPW_EEPROM_MAC + 2);
        ic->ic_macaddr[4] = val >> 8;
        ic->ic_macaddr[5] = val & 0xff;

        sc->chanmask = ipw_read_chanmask(sc);
        ipw_getradiocaps(ic, IEEE80211_CHAN_MAX, &ic->ic_nchans,
            ic->ic_channels);

        /* check support for radio transmitter switch in EEPROM */
        if (!(ipw_read_prom_word(sc, IPW_EEPROM_RADIO) & 8))
                sc->flags |= IPW_FLAG_HAS_RADIO_SWITCH;

        ieee80211_ifattach(ic);
        ic->ic_scan_start = ipw_scan_start;
        ic->ic_scan_end = ipw_scan_end;
        ic->ic_getradiocaps = ipw_getradiocaps;
        ic->ic_set_channel = ipw_set_channel;
        ic->ic_scan_curchan = ipw_scan_curchan;
        ic->ic_scan_mindwell = ipw_scan_mindwell;
        ic->ic_raw_xmit = ipw_raw_xmit;
        ic->ic_vap_create = ipw_vap_create;
        ic->ic_vap_delete = ipw_vap_delete;
        ic->ic_transmit = ipw_transmit;
        ic->ic_parent = ipw_parent;

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

        /*
         * Add a few sysctl knobs.
         */
        SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev),
            SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO, "radio",
            CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_NEEDGIANT, sc, 0,
            ipw_sysctl_radio, "I",
            "radio transmitter switch state (0=off, 1=on)");

        SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev),
            SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO, "stats",
            CTLTYPE_OPAQUE | CTLFLAG_RD | CTLFLAG_NEEDGIANT, sc, 0,
            ipw_sysctl_stats, "S", "statistics");

        /*
         * Hook our interrupt after all initialization is complete.
         */
        error = bus_setup_intr(dev, sc->irq, INTR_TYPE_NET | INTR_MPSAFE,
            NULL, ipw_intr, sc, &sc->sc_ih);
        if (error != 0) {
                device_printf(dev, "could not set up interrupt\n");
                goto fail3;
        }

        if (bootverbose)
                ieee80211_announce(ic);

        return 0;
fail3:
        ipw_release(sc);
fail2:
        bus_release_resource(dev, SYS_RES_IRQ, rman_get_rid(sc->irq), sc->irq);
fail1:
        bus_release_resource(dev, SYS_RES_MEMORY, rman_get_rid(sc->mem),
            sc->mem);
fail:
        mtx_destroy(&sc->sc_mtx);
        return ENXIO;
}

static int
ipw_detach(device_t dev)
{
        struct ipw_softc *sc = device_get_softc(dev);
        struct ieee80211com *ic = &sc->sc_ic;

        bus_teardown_intr(dev, sc->irq, sc->sc_ih);

        ieee80211_draintask(ic, &sc->sc_init_task);
        ipw_stop(sc);

        ieee80211_ifdetach(ic);

        callout_drain(&sc->sc_wdtimer);
        mbufq_drain(&sc->sc_snd);

        ipw_release(sc);

        bus_release_resource(dev, SYS_RES_IRQ, rman_get_rid(sc->irq), sc->irq);

        bus_release_resource(dev, SYS_RES_MEMORY, rman_get_rid(sc->mem),
            sc->mem);

        if (sc->sc_firmware != NULL) {
                firmware_put(sc->sc_firmware, FIRMWARE_UNLOAD);
                sc->sc_firmware = NULL;
        }

        mtx_destroy(&sc->sc_mtx);

        return 0;
}

static struct ieee80211vap *
ipw_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 ipw_softc *sc = ic->ic_softc;
        struct ipw_vap *ivp;
        struct ieee80211vap *vap;
        const struct firmware *fp;
        const struct ipw_firmware_hdr *hdr;
        const char *imagename;

        if (!TAILQ_EMPTY(&ic->ic_vaps))         /* only one at a time */
                return NULL;

        switch (opmode) {
        case IEEE80211_M_STA:
                imagename = "ipw_bss";
                break;
        case IEEE80211_M_IBSS:
                imagename = "ipw_ibss";
                break;
        case IEEE80211_M_MONITOR:
                imagename = "ipw_monitor";
                break;
        default:
                return NULL;
        }

        /*
         * Load firmware image using the firmware(9) subsystem.  Doing
         * this unlocked is ok since we're single-threaded by the
         * 802.11 layer.
         */
        if (sc->sc_firmware == NULL ||
            strcmp(sc->sc_firmware->name, imagename) != 0) {
                if (sc->sc_firmware != NULL)
                        firmware_put(sc->sc_firmware, FIRMWARE_UNLOAD);
                sc->sc_firmware = firmware_get(imagename);
        }
        if (sc->sc_firmware == NULL) {
                device_printf(sc->sc_dev,
                    "could not load firmware image '%s'\n", imagename);
                return NULL;
        }
        fp = sc->sc_firmware;
        if (fp->datasize < sizeof *hdr) {
                device_printf(sc->sc_dev,
                    "firmware image too short %zu\n", fp->datasize);
                firmware_put(sc->sc_firmware, FIRMWARE_UNLOAD);
                sc->sc_firmware = NULL;
                return NULL;
        }
        hdr = (const struct ipw_firmware_hdr *)fp->data;
        if (fp->datasize < sizeof *hdr + le32toh(hdr->mainsz) +
            le32toh(hdr->ucodesz)) {
                device_printf(sc->sc_dev,
                    "firmware image too short %zu\n", fp->datasize);
                firmware_put(sc->sc_firmware, FIRMWARE_UNLOAD);
                sc->sc_firmware = NULL;
                return NULL;
        }

        ivp = malloc(sizeof(struct ipw_vap), M_80211_VAP, M_WAITOK | M_ZERO);
        vap = &ivp->vap;

        ieee80211_vap_setup(ic, vap, name, unit, opmode, flags, bssid);
        /* override with driver methods */
        ivp->newstate = vap->iv_newstate;
        vap->iv_newstate = ipw_newstate;

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

static void
ipw_vap_delete(struct ieee80211vap *vap)
{
        struct ipw_vap *ivp = IPW_VAP(vap);

        ieee80211_vap_detach(vap);
        free(ivp, M_80211_VAP);
}

static int
ipw_dma_alloc(struct ipw_softc *sc)
{
        struct ipw_soft_bd *sbd;
        struct ipw_soft_hdr *shdr;
        struct ipw_soft_buf *sbuf;
        bus_addr_t physaddr;
        int error, i;

        /*
         * Allocate parent DMA tag for subsequent allocations.
         */
        error = bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), 1, 0,
            BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL,
            BUS_SPACE_MAXSIZE_32BIT, BUS_SPACE_UNRESTRICTED,
            BUS_SPACE_MAXSIZE_32BIT, 0, NULL, NULL, &sc->parent_dmat);
        if (error != 0) {
                device_printf(sc->sc_dev, "could not create parent DMA tag\n");
                goto fail;
        }

        /*
         * Allocate and map tx ring.
         */
        error = bus_dma_tag_create(sc->parent_dmat, 4, 0, BUS_SPACE_MAXADDR_32BIT,
            BUS_SPACE_MAXADDR, NULL, NULL, IPW_TBD_SZ, 1, IPW_TBD_SZ, 0, NULL,
            NULL, &sc->tbd_dmat);
        if (error != 0) {
                device_printf(sc->sc_dev, "could not create tx ring DMA tag\n");
                goto fail;
        }

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

        error = bus_dmamap_load(sc->tbd_dmat, sc->tbd_map, sc->tbd_list,
            IPW_TBD_SZ, ipw_dma_map_addr, &sc->tbd_phys, 0);
        if (error != 0) {
                device_printf(sc->sc_dev, "could not map tx ring DMA memory\n");
                goto fail;
        }

        /*
         * Allocate and map rx ring.
         */
        error = bus_dma_tag_create(sc->parent_dmat, 4, 0, BUS_SPACE_MAXADDR_32BIT,
            BUS_SPACE_MAXADDR, NULL, NULL, IPW_RBD_SZ, 1, IPW_RBD_SZ, 0, NULL,
            NULL, &sc->rbd_dmat);
        if (error != 0) {
                device_printf(sc->sc_dev, "could not create rx ring DMA tag\n");
                goto fail;
        }

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

        error = bus_dmamap_load(sc->rbd_dmat, sc->rbd_map, sc->rbd_list,
            IPW_RBD_SZ, ipw_dma_map_addr, &sc->rbd_phys, 0);
        if (error != 0) {
                device_printf(sc->sc_dev, "could not map rx ring DMA memory\n");
                goto fail;
        }

        /*
         * Allocate and map status ring.
         */
        error = bus_dma_tag_create(sc->parent_dmat, 4, 0, BUS_SPACE_MAXADDR_32BIT,
            BUS_SPACE_MAXADDR, NULL, NULL, IPW_STATUS_SZ, 1, IPW_STATUS_SZ, 0,
            NULL, NULL, &sc->status_dmat);
        if (error != 0) {
                device_printf(sc->sc_dev,
                    "could not create status ring DMA tag\n");
                goto fail;
        }

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

        error = bus_dmamap_load(sc->status_dmat, sc->status_map,
            sc->status_list, IPW_STATUS_SZ, ipw_dma_map_addr, &sc->status_phys,
            0);
        if (error != 0) {
                device_printf(sc->sc_dev,
                    "could not map status ring DMA memory\n");
                goto fail;
        }

        /*
         * Allocate command DMA map.
         */
        error = bus_dma_tag_create(sc->parent_dmat, 1, 0, BUS_SPACE_MAXADDR_32BIT,
            BUS_SPACE_MAXADDR, NULL, NULL, sizeof (struct ipw_cmd), 1,
            sizeof (struct ipw_cmd), 0, NULL, NULL, &sc->cmd_dmat);
        if (error != 0) {
                device_printf(sc->sc_dev, "could not create command DMA tag\n");
                goto fail;
        }

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

        /*
         * Allocate headers DMA maps.
         */
        error = bus_dma_tag_create(sc->parent_dmat, 1, 0, BUS_SPACE_MAXADDR_32BIT,
            BUS_SPACE_MAXADDR, NULL, NULL, sizeof (struct ipw_hdr), 1,
            sizeof (struct ipw_hdr), 0, NULL, NULL, &sc->hdr_dmat);
        if (error != 0) {
                device_printf(sc->sc_dev, "could not create header DMA tag\n");
                goto fail;
        }

        SLIST_INIT(&sc->free_shdr);
        for (i = 0; i < IPW_NDATA; i++) {
                shdr = &sc->shdr_list[i];
                error = bus_dmamap_create(sc->hdr_dmat, 0, &shdr->map);
                if (error != 0) {
                        device_printf(sc->sc_dev,
                            "could not create header DMA map\n");
                        goto fail;
                }
                SLIST_INSERT_HEAD(&sc->free_shdr, shdr, next);
        }

        /*
         * Allocate tx buffers DMA maps.
         */
        error = bus_dma_tag_create(sc->parent_dmat, 1, 0, BUS_SPACE_MAXADDR_32BIT,
            BUS_SPACE_MAXADDR, NULL, NULL, MCLBYTES, IPW_MAX_NSEG, MCLBYTES, 0,
            NULL, NULL, &sc->txbuf_dmat);
        if (error != 0) {
                device_printf(sc->sc_dev, "could not create tx DMA tag\n");
                goto fail;
        }

        SLIST_INIT(&sc->free_sbuf);
        for (i = 0; i < IPW_NDATA; i++) {
                sbuf = &sc->tx_sbuf_list[i];
                error = bus_dmamap_create(sc->txbuf_dmat, 0, &sbuf->map);
                if (error != 0) {
                        device_printf(sc->sc_dev,
                            "could not create tx DMA map\n");
                        goto fail;
                }
                SLIST_INSERT_HEAD(&sc->free_sbuf, sbuf, next);
        }

        /*
         * Initialize tx ring.
         */
        for (i = 0; i < IPW_NTBD; i++) {
                sbd = &sc->stbd_list[i];
                sbd->bd = &sc->tbd_list[i];
                sbd->type = IPW_SBD_TYPE_NOASSOC;
        }

        /*
         * Pre-allocate rx buffers and DMA maps.
         */
        error = bus_dma_tag_create(sc->parent_dmat, 1, 0, BUS_SPACE_MAXADDR_32BIT,
            BUS_SPACE_MAXADDR, NULL, NULL, MCLBYTES, 1, MCLBYTES, 0, NULL,
            NULL, &sc->rxbuf_dmat);
        if (error != 0) {
                device_printf(sc->sc_dev, "could not create rx DMA tag\n");
                goto fail;
        }

        for (i = 0; i < IPW_NRBD; i++) {
                sbd = &sc->srbd_list[i];
                sbuf = &sc->rx_sbuf_list[i];
                sbd->bd = &sc->rbd_list[i];

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

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

                error = bus_dmamap_load(sc->rxbuf_dmat, sbuf->map,
                    mtod(sbuf->m, void *), MCLBYTES, ipw_dma_map_addr,
                    &physaddr, 0);
                if (error != 0) {
                        device_printf(sc->sc_dev,
                            "could not map rx DMA memory\n");
                        goto fail;
                }

                sbd->type = IPW_SBD_TYPE_DATA;
                sbd->priv = sbuf;
                sbd->bd->physaddr = htole32(physaddr);
                sbd->bd->len = htole32(MCLBYTES);
        }

        bus_dmamap_sync(sc->rbd_dmat, sc->rbd_map, BUS_DMASYNC_PREWRITE);

        return 0;

fail:   ipw_release(sc);
        return error;
}

static void
ipw_release(struct ipw_softc *sc)
{
        struct ipw_soft_buf *sbuf;
        int i;

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

        if (sc->tbd_dmat != NULL) {
                bus_dmamap_unload(sc->tbd_dmat, sc->tbd_map);
                bus_dmamem_free(sc->tbd_dmat, sc->tbd_list, sc->tbd_map);
                bus_dma_tag_destroy(sc->tbd_dmat);
        }

        if (sc->rbd_dmat != NULL) {
                if (sc->rbd_list != NULL) {
                        bus_dmamap_unload(sc->rbd_dmat, sc->rbd_map);
                        bus_dmamem_free(sc->rbd_dmat, sc->rbd_list,
                            sc->rbd_map);
                }
                bus_dma_tag_destroy(sc->rbd_dmat);
        }

        if (sc->status_dmat != NULL) {
                if (sc->status_list != NULL) {
                        bus_dmamap_unload(sc->status_dmat, sc->status_map);
                        bus_dmamem_free(sc->status_dmat, sc->status_list,
                            sc->status_map);
                }
                bus_dma_tag_destroy(sc->status_dmat);
        }

        for (i = 0; i < IPW_NTBD; i++)
                ipw_release_sbd(sc, &sc->stbd_list[i]);

        if (sc->cmd_dmat != NULL) {
                bus_dmamap_destroy(sc->cmd_dmat, sc->cmd_map);
                bus_dma_tag_destroy(sc->cmd_dmat);
        }

        if (sc->hdr_dmat != NULL) {
                for (i = 0; i < IPW_NDATA; i++)
                        bus_dmamap_destroy(sc->hdr_dmat, sc->shdr_list[i].map);
                bus_dma_tag_destroy(sc->hdr_dmat);
        }

        if (sc->txbuf_dmat != NULL) {
                for (i = 0; i < IPW_NDATA; i++) {
                        bus_dmamap_destroy(sc->txbuf_dmat,
                            sc->tx_sbuf_list[i].map);
                }
                bus_dma_tag_destroy(sc->txbuf_dmat);
        }

        if (sc->rxbuf_dmat != NULL) {
                for (i = 0; i < IPW_NRBD; i++) {
                        sbuf = &sc->rx_sbuf_list[i];
                        if (sbuf->m != NULL) {
                                bus_dmamap_sync(sc->rxbuf_dmat, sbuf->map,
                                    BUS_DMASYNC_POSTREAD);
                                bus_dmamap_unload(sc->rxbuf_dmat, sbuf->map);
                                m_freem(sbuf->m);
                        }
                        bus_dmamap_destroy(sc->rxbuf_dmat, sbuf->map);
                }
                bus_dma_tag_destroy(sc->rxbuf_dmat);
        }
}

static int
ipw_shutdown(device_t dev)
{
        struct ipw_softc *sc = device_get_softc(dev);

        ipw_stop(sc);

        return 0;
}

static int
ipw_suspend(device_t dev)
{
        struct ipw_softc *sc = device_get_softc(dev);
        struct ieee80211com *ic = &sc->sc_ic;

        ieee80211_suspend_all(ic);
        return 0;
}

static int
ipw_resume(device_t dev)
{
        struct ipw_softc *sc = device_get_softc(dev);
        struct ieee80211com *ic = &sc->sc_ic;

        pci_write_config(dev, 0x41, 0, 1);

        ieee80211_resume_all(ic);
        return 0;
}

static int
ipw_cvtrate(int ipwrate)
{
        switch (ipwrate) {
        case IPW_RATE_DS1:      return 2;
        case IPW_RATE_DS2:      return 4;
        case IPW_RATE_DS5:      return 11;
        case IPW_RATE_DS11:     return 22;
        }
        return 0;
}

/*
 * The firmware automatically adapts the transmit speed. We report its current
 * value here.
 */
static void
ipw_media_status(if_t ifp, struct ifmediareq *imr)
{
        struct ieee80211vap *vap = if_getsoftc(ifp);
        struct ieee80211com *ic = vap->iv_ic;
        struct ipw_softc *sc = ic->ic_softc;

        /* read current transmission rate from adapter */
        ieee80211_node_set_txrate_dot11rate(vap->iv_bss,
            ipw_cvtrate(ipw_read_table1(sc, IPW_INFO_CURRENT_TX_RATE) & 0xf));
        ieee80211_media_status(ifp, imr);
}

static int
ipw_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
{
        struct ipw_vap *ivp = IPW_VAP(vap);
        struct ieee80211com *ic = vap->iv_ic;
        struct ipw_softc *sc = ic->ic_softc;
        enum ieee80211_state ostate;

        DPRINTF(("%s: %s -> %s flags 0x%x\n", __func__,
                ieee80211_state_name[vap->iv_state],
                ieee80211_state_name[nstate], sc->flags));

        ostate = vap->iv_state;
        IEEE80211_UNLOCK(ic);

        switch (nstate) {
        case IEEE80211_S_RUN:
                if (ic->ic_opmode == IEEE80211_M_IBSS) {
                        /*
                         * XXX when joining an ibss network we are called
                         * with a SCAN -> RUN transition on scan complete.
                         * Use that to call ipw_assoc.  On completing the
                         * join we are then called again with an AUTH -> RUN
                         * transition and we want to do nothing.  This is
                         * all totally bogus and needs to be redone.
                         */
                        if (ostate == IEEE80211_S_SCAN)
                                ipw_assoc(ic, vap);
                }
                break;

        case IEEE80211_S_INIT:
                if (sc->flags & IPW_FLAG_ASSOCIATED)
                        ipw_disassoc(ic, vap);
                break;

        case IEEE80211_S_AUTH:
                /*
                 * Move to ASSOC state after the ipw_assoc() call.  Firmware
                 * takes care of authentication, after the call we'll receive
                 * only an assoc response which would otherwise be discared
                 * if we are still in AUTH state.
                 */
                nstate = IEEE80211_S_ASSOC;
                ipw_assoc(ic, vap);
                break;

        case IEEE80211_S_ASSOC:
                /*
                 * If we are not transitioning from AUTH then resend the
                 * association request.
                 */
                if (ostate != IEEE80211_S_AUTH)
                        ipw_assoc(ic, vap);
                break;

        default:
                break;
        }
        IEEE80211_LOCK(ic);
        return ivp->newstate(vap, nstate, arg);
}

/*
 * Read 16 bits at address 'addr' from the serial EEPROM.
 */
static uint16_t
ipw_read_prom_word(struct ipw_softc *sc, uint8_t addr)
{
        uint32_t tmp;
        uint16_t val;
        int n;

        /* clock C once before the first command */
        IPW_EEPROM_CTL(sc, 0);
        IPW_EEPROM_CTL(sc, IPW_EEPROM_S);
        IPW_EEPROM_CTL(sc, IPW_EEPROM_S | IPW_EEPROM_C);
        IPW_EEPROM_CTL(sc, IPW_EEPROM_S);

        /* write start bit (1) */
        IPW_EEPROM_CTL(sc, IPW_EEPROM_S | IPW_EEPROM_D);
        IPW_EEPROM_CTL(sc, IPW_EEPROM_S | IPW_EEPROM_D | IPW_EEPROM_C);

        /* write READ opcode (10) */
        IPW_EEPROM_CTL(sc, IPW_EEPROM_S | IPW_EEPROM_D);
        IPW_EEPROM_CTL(sc, IPW_EEPROM_S | IPW_EEPROM_D | IPW_EEPROM_C);
        IPW_EEPROM_CTL(sc, IPW_EEPROM_S);
        IPW_EEPROM_CTL(sc, IPW_EEPROM_S | IPW_EEPROM_C);

        /* write address A7-A0 */
        for (n = 7; n >= 0; n--) {
                IPW_EEPROM_CTL(sc, IPW_EEPROM_S |
                    (((addr >> n) & 1) << IPW_EEPROM_SHIFT_D));
                IPW_EEPROM_CTL(sc, IPW_EEPROM_S |
                    (((addr >> n) & 1) << IPW_EEPROM_SHIFT_D) | IPW_EEPROM_C);
        }

        IPW_EEPROM_CTL(sc, IPW_EEPROM_S);

        /* read data Q15-Q0 */
        val = 0;
        for (n = 15; n >= 0; n--) {
                IPW_EEPROM_CTL(sc, IPW_EEPROM_S | IPW_EEPROM_C);
                IPW_EEPROM_CTL(sc, IPW_EEPROM_S);
                tmp = MEM_READ_4(sc, IPW_MEM_EEPROM_CTL);
                val |= ((tmp & IPW_EEPROM_Q) >> IPW_EEPROM_SHIFT_Q) << n;
        }

        IPW_EEPROM_CTL(sc, 0);

        /* clear Chip Select and clock C */
        IPW_EEPROM_CTL(sc, IPW_EEPROM_S);
        IPW_EEPROM_CTL(sc, 0);
        IPW_EEPROM_CTL(sc, IPW_EEPROM_C);

        return le16toh(val);
}

static uint16_t
ipw_read_chanmask(struct ipw_softc *sc)
{
        uint16_t val;

        /* set supported .11b channels (read from EEPROM) */
        if ((val = ipw_read_prom_word(sc, IPW_EEPROM_CHANNEL_LIST)) == 0)
                val = 0x7ff;    /* default to channels 1-11 */
        val <<= 1;

        return (val);
}

static void
ipw_rx_cmd_intr(struct ipw_softc *sc, struct ipw_soft_buf *sbuf)
{
        struct ipw_cmd *cmd;

        bus_dmamap_sync(sc->rxbuf_dmat, sbuf->map, BUS_DMASYNC_POSTREAD);

        cmd = mtod(sbuf->m, struct ipw_cmd *);

        DPRINTFN(9, ("cmd ack'ed %s(%u, %u, %u, %u, %u)\n",
            ipw_cmdname(le32toh(cmd->type)), le32toh(cmd->type),
            le32toh(cmd->subtype), le32toh(cmd->seq), le32toh(cmd->len),
            le32toh(cmd->status)));

        sc->flags &= ~IPW_FLAG_BUSY;
        wakeup(sc);
}

static void
ipw_rx_newstate_intr(struct ipw_softc *sc, struct ipw_soft_buf *sbuf)
{
#define IEEESTATE(vap)  ieee80211_state_name[vap->iv_state]
        struct ieee80211com *ic = &sc->sc_ic;
        struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps);
        uint32_t state;

        bus_dmamap_sync(sc->rxbuf_dmat, sbuf->map, BUS_DMASYNC_POSTREAD);

        state = le32toh(*mtod(sbuf->m, uint32_t *));

        switch (state) {
        case IPW_STATE_ASSOCIATED:
                DPRINTFN(2, ("Association succeeded (%s flags 0x%x)\n",
                        IEEESTATE(vap), sc->flags));
                /* XXX suppress state change in case the fw auto-associates */
                if ((sc->flags & IPW_FLAG_ASSOCIATING) == 0) {
                        DPRINTF(("Unexpected association (%s, flags 0x%x)\n",
                                IEEESTATE(vap), sc->flags));
                        break;
                }
                sc->flags &= ~IPW_FLAG_ASSOCIATING;
                sc->flags |= IPW_FLAG_ASSOCIATED;
                break;

        case IPW_STATE_SCANNING:
                DPRINTFN(3, ("Scanning (%s flags 0x%x)\n",
                        IEEESTATE(vap), sc->flags));
                /*
                 * NB: Check driver state for association on assoc
                 * loss as the firmware will immediately start to
                 * scan and we would treat it as a beacon miss if
                 * we checked the 802.11 layer state.
                 */
                if (sc->flags & IPW_FLAG_ASSOCIATED) {
                        IPW_UNLOCK(sc);
                        /* XXX probably need to issue disassoc to fw */
                        ieee80211_beacon_miss(ic);
                        IPW_LOCK(sc);
                }
                break;

        case IPW_STATE_SCAN_COMPLETE:
                /*
                 * XXX For some reason scan requests generate scan
                 * started + scan done events before any traffic is
                 * received (e.g. probe response frames).  We work
                 * around this by marking the HACK flag and skipping
                 * the first scan complete event.
                */
                DPRINTFN(3, ("Scan complete (%s flags 0x%x)\n",
                            IEEESTATE(vap), sc->flags));
                if (sc->flags & IPW_FLAG_HACK) {
                        sc->flags &= ~IPW_FLAG_HACK;
                        break;
                }
                if (sc->flags & IPW_FLAG_SCANNING) {
                        IPW_UNLOCK(sc);
                        ieee80211_scan_done(vap);
                        IPW_LOCK(sc);
                        sc->flags &= ~IPW_FLAG_SCANNING;
                        sc->sc_scan_timer = 0;
                }
                break;

        case IPW_STATE_ASSOCIATION_LOST:
                DPRINTFN(2, ("Association lost (%s flags 0x%x)\n",
                        IEEESTATE(vap), sc->flags));
                sc->flags &= ~(IPW_FLAG_ASSOCIATING | IPW_FLAG_ASSOCIATED);
                if (vap->iv_state == IEEE80211_S_RUN) {
                        IPW_UNLOCK(sc);
                        ieee80211_new_state(vap, IEEE80211_S_SCAN, -1);
                        IPW_LOCK(sc);
                }
                break;

        case IPW_STATE_DISABLED:
                /* XXX? is this right? */
                sc->flags &= ~(IPW_FLAG_HACK | IPW_FLAG_SCANNING |
                    IPW_FLAG_ASSOCIATING | IPW_FLAG_ASSOCIATED);
                DPRINTFN(2, ("Firmware disabled (%s flags 0x%x)\n",
                        IEEESTATE(vap), sc->flags));
                break;

        case IPW_STATE_RADIO_DISABLED:
                device_printf(sc->sc_dev, "radio turned off\n");
                ieee80211_notify_radio(ic, 0);
                ipw_stop_locked(sc);
                /* XXX start polling thread to detect radio on */
                break;

        default:
                DPRINTFN(2, ("%s: unhandled state %u %s flags 0x%x\n",
                        __func__, state, IEEESTATE(vap), sc->flags));
                break;
        }
#undef IEEESTATE
}

/*
 * Set driver state for current channel.
 */
static void
ipw_setcurchan(struct ipw_softc *sc, struct ieee80211_channel *chan)
{
        struct ieee80211com *ic = &sc->sc_ic;

        ic->ic_curchan = chan;
        ieee80211_radiotap_chan_change(ic);
}

/*
 * XXX: Hack to set the current channel to the value advertised in beacons or
 * probe responses. Only used during AP detection.
 */
static void
ipw_fix_channel(struct ipw_softc *sc, struct mbuf *m)
{
        struct ieee80211com *ic = &sc->sc_ic;
        struct ieee80211_channel *c;
        struct ieee80211_frame *wh;
        uint8_t subtype;
        uint8_t *frm, *efrm;

        wh = mtod(m, struct ieee80211_frame *);

        if (!IEEE80211_IS_MGMT(wh))
                return;

        subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK;

        if (subtype != IEEE80211_FC0_SUBTYPE_BEACON &&
            subtype != IEEE80211_FC0_SUBTYPE_PROBE_RESP)
                return;

        /* XXX use ieee80211_parse_beacon */
        frm = (uint8_t *)(wh + 1);
        efrm = mtod(m, uint8_t *) + m->m_len;

        frm += 12;      /* skip tstamp, bintval and capinfo fields */
        while (frm < efrm) {
                if (*frm == IEEE80211_ELEMID_DSPARMS)
#if IEEE80211_CHAN_MAX < 255
                if (frm[2] <= IEEE80211_CHAN_MAX)
#endif
                {
                        DPRINTF(("Fixing channel to %d\n", frm[2]));
                        c = ieee80211_find_channel(ic,
                                ieee80211_ieee2mhz(frm[2], 0),
                                IEEE80211_CHAN_B);
                        if (c == NULL)
                                c = &ic->ic_channels[0];
                        ipw_setcurchan(sc, c);
                }

                frm += frm[1] + 2;
        }
}

static void
ipw_rx_data_intr(struct ipw_softc *sc, struct ipw_status *status,
    struct ipw_soft_bd *sbd, struct ipw_soft_buf *sbuf)
{
        struct ieee80211com *ic = &sc->sc_ic;
        struct mbuf *mnew, *m;
        struct ieee80211_node *ni;
        bus_addr_t physaddr;
        int error;
        int8_t rssi, nf;

        DPRINTFN(5, ("received frame len=%u, rssi=%u\n", le32toh(status->len),
            status->rssi));

        if (le32toh(status->len) < sizeof (struct ieee80211_frame_min) ||
            le32toh(status->len) > MCLBYTES)
                return;

        /*
         * Try to allocate a new mbuf for this ring element and load it before
         * processing the current mbuf. If the ring element cannot be loaded,
         * drop the received packet and reuse the old mbuf. In the unlikely
         * case that the old mbuf can't be reloaded either, explicitly panic.
         */
        mnew = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR);
        if (mnew == NULL) {
                counter_u64_add(ic->ic_ierrors, 1);
                return;
        }

        bus_dmamap_sync(sc->rxbuf_dmat, sbuf->map, BUS_DMASYNC_POSTREAD);
        bus_dmamap_unload(sc->rxbuf_dmat, sbuf->map);

        error = bus_dmamap_load(sc->rxbuf_dmat, sbuf->map, mtod(mnew, void *),
            MCLBYTES, ipw_dma_map_addr, &physaddr, 0);
        if (error != 0) {
                m_freem(mnew);

                /* try to reload the old mbuf */
                error = bus_dmamap_load(sc->rxbuf_dmat, sbuf->map,
                    mtod(sbuf->m, void *), MCLBYTES, ipw_dma_map_addr,
                    &physaddr, 0);
                if (error != 0) {
                        /* very unlikely that it will fail... */
                        panic("%s: could not load old rx mbuf",
                            device_get_name(sc->sc_dev));
                }
                counter_u64_add(ic->ic_ierrors, 1);
                return;
        }

        /*
         * New mbuf successfully loaded, update Rx ring and continue
         * processing.
         */
        m = sbuf->m;
        sbuf->m = mnew;
        sbd->bd->physaddr = htole32(physaddr);
        m->m_pkthdr.len = m->m_len = le32toh(status->len);

        rssi = status->rssi + IPW_RSSI_TO_DBM;
        nf = -95;
        if (ieee80211_radiotap_active(ic)) {
                struct ipw_rx_radiotap_header *tap = &sc->sc_rxtap;

                tap->wr_flags = 0;
                tap->wr_antsignal = rssi;
                tap->wr_antnoise = nf;
        }

        if (sc->flags & IPW_FLAG_SCANNING)
                ipw_fix_channel(sc, m);

        IPW_UNLOCK(sc);
        ni = ieee80211_find_rxnode(ic, mtod(m, struct ieee80211_frame_min *));
        if (ni != NULL) {
                (void) ieee80211_input(ni, m, rssi - nf, nf);
                ieee80211_free_node(ni);
        } else
                (void) ieee80211_input_all(ic, m, rssi - nf, nf);
        IPW_LOCK(sc);

        bus_dmamap_sync(sc->rbd_dmat, sc->rbd_map, BUS_DMASYNC_PREWRITE);
}

static void
ipw_rx_intr(struct ipw_softc *sc)
{
        struct ipw_status *status;
        struct ipw_soft_bd *sbd;
        struct ipw_soft_buf *sbuf;
        uint32_t r, i;

        if (!(sc->flags & IPW_FLAG_FW_INITED))
                return;

        r = CSR_READ_4(sc, IPW_CSR_RX_READ);

        bus_dmamap_sync(sc->status_dmat, sc->status_map, BUS_DMASYNC_POSTREAD);

        for (i = (sc->rxcur + 1) % IPW_NRBD; i != r; i = (i + 1) % IPW_NRBD) {
                status = &sc->status_list[i];
                sbd = &sc->srbd_list[i];
                sbuf = sbd->priv;

                switch (le16toh(status->code) & 0xf) {
                case IPW_STATUS_CODE_COMMAND:
                        ipw_rx_cmd_intr(sc, sbuf);
                        break;

                case IPW_STATUS_CODE_NEWSTATE:
                        ipw_rx_newstate_intr(sc, sbuf);
                        break;

                case IPW_STATUS_CODE_DATA_802_3:
                case IPW_STATUS_CODE_DATA_802_11:
                        ipw_rx_data_intr(sc, status, sbd, sbuf);
                        break;

                case IPW_STATUS_CODE_NOTIFICATION:
                        DPRINTFN(2, ("notification status, len %u flags 0x%x\n",
                            le32toh(status->len), status->flags));
                        /* XXX maybe drive state machine AUTH->ASSOC? */
                        break;

                default:
                        device_printf(sc->sc_dev, "unexpected status code %u\n",
                            le16toh(status->code));
                }

                /* firmware was killed, stop processing received frames */
                if (!(sc->flags & IPW_FLAG_FW_INITED))
                        return;

                sbd->bd->flags = 0;
        }

        bus_dmamap_sync(sc->rbd_dmat, sc->rbd_map, BUS_DMASYNC_PREWRITE);

        /* kick the firmware */
        sc->rxcur = (r == 0) ? IPW_NRBD - 1 : r - 1;
        CSR_WRITE_4(sc, IPW_CSR_RX_WRITE, sc->rxcur);
}

static void
ipw_release_sbd(struct ipw_softc *sc, struct ipw_soft_bd *sbd)
{
        struct ipw_soft_hdr *shdr;
        struct ipw_soft_buf *sbuf;

        switch (sbd->type) {
        case IPW_SBD_TYPE_COMMAND:
                bus_dmamap_sync(sc->cmd_dmat, sc->cmd_map,
                    BUS_DMASYNC_POSTWRITE);
                bus_dmamap_unload(sc->cmd_dmat, sc->cmd_map);
                break;

        case IPW_SBD_TYPE_HEADER:
                shdr = sbd->priv;
                bus_dmamap_sync(sc->hdr_dmat, shdr->map, BUS_DMASYNC_POSTWRITE);
                bus_dmamap_unload(sc->hdr_dmat, shdr->map);
                SLIST_INSERT_HEAD(&sc->free_shdr, shdr, next);
                break;

        case IPW_SBD_TYPE_DATA:
                sbuf = sbd->priv;
                bus_dmamap_sync(sc->txbuf_dmat, sbuf->map,
                    BUS_DMASYNC_POSTWRITE);
                bus_dmamap_unload(sc->txbuf_dmat, sbuf->map);
                SLIST_INSERT_HEAD(&sc->free_sbuf, sbuf, next);

                ieee80211_tx_complete(sbuf->ni, sbuf->m, 0/*XXX*/);

                sc->sc_tx_timer = 0;
                break;
        }

        sbd->type = IPW_SBD_TYPE_NOASSOC;
}

static void
ipw_tx_intr(struct ipw_softc *sc)
{
        struct ipw_soft_bd *sbd;
        uint32_t r, i;

        if (!(sc->flags & IPW_FLAG_FW_INITED))
                return;

        r = CSR_READ_4(sc, IPW_CSR_TX_READ);

        for (i = (sc->txold + 1) % IPW_NTBD; i != r; i = (i + 1) % IPW_NTBD) {
                sbd = &sc->stbd_list[i];
                ipw_release_sbd(sc, sbd);
                sc->txfree++;
        }

        /* remember what the firmware has processed */
        sc->txold = (r == 0) ? IPW_NTBD - 1 : r - 1;

        ipw_start(sc);
}

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

        device_printf(sc->sc_dev, "firmware error\n");
        if (vap != NULL) {
                IPW_UNLOCK(sc);
                ieee80211_cancel_scan(vap);
                IPW_LOCK(sc);
        }
        ieee80211_runtask(ic, &sc->sc_init_task);
}

static void
ipw_intr(void *arg)
{
        struct ipw_softc *sc = arg;
        uint32_t r;

        IPW_LOCK(sc);

        r = CSR_READ_4(sc, IPW_CSR_INTR);
        if (r == 0 || r == 0xffffffff)
                goto done;

        /* disable interrupts */
        CSR_WRITE_4(sc, IPW_CSR_INTR_MASK, 0);

        /* acknowledge all interrupts */
        CSR_WRITE_4(sc, IPW_CSR_INTR, r);

        if (r & (IPW_INTR_FATAL_ERROR | IPW_INTR_PARITY_ERROR)) {
                ipw_fatal_error_intr(sc);
                goto done;
        }

        if (r & IPW_INTR_FW_INIT_DONE)
                wakeup(sc);

        if (r & IPW_INTR_RX_TRANSFER)
                ipw_rx_intr(sc);

        if (r & IPW_INTR_TX_TRANSFER)
                ipw_tx_intr(sc);

        /* re-enable interrupts */
        CSR_WRITE_4(sc, IPW_CSR_INTR_MASK, IPW_INTR_MASK);
done:
        IPW_UNLOCK(sc);
}

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

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

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

static const char *
ipw_cmdname(int cmd)
{
        static const struct {
                int     cmd;
                const char *name;
        } cmds[] = {
                { IPW_CMD_ADD_MULTICAST,        "ADD_MULTICAST" },
                { IPW_CMD_BROADCAST_SCAN,       "BROADCAST_SCAN" },
                { IPW_CMD_DISABLE,              "DISABLE" },
                { IPW_CMD_DISABLE_PHY,          "DISABLE_PHY" },
                { IPW_CMD_ENABLE,               "ENABLE" },
                { IPW_CMD_PREPARE_POWER_DOWN,   "PREPARE_POWER_DOWN" },
                { IPW_CMD_SET_BASIC_TX_RATES,   "SET_BASIC_TX_RATES" },
                { IPW_CMD_SET_BEACON_INTERVAL,  "SET_BEACON_INTERVAL" },
                { IPW_CMD_SET_CHANNEL,          "SET_CHANNEL" },
                { IPW_CMD_SET_CONFIGURATION,    "SET_CONFIGURATION" },
                { IPW_CMD_SET_DESIRED_BSSID,    "SET_DESIRED_BSSID" },
                { IPW_CMD_SET_ESSID,            "SET_ESSID" },
                { IPW_CMD_SET_FRAG_THRESHOLD,   "SET_FRAG_THRESHOLD" },
                { IPW_CMD_SET_MAC_ADDRESS,      "SET_MAC_ADDRESS" },
                { IPW_CMD_SET_MANDATORY_BSSID,  "SET_MANDATORY_BSSID" },
                { IPW_CMD_SET_MODE,             "SET_MODE" },
                { IPW_CMD_SET_MSDU_TX_RATES,    "SET_MSDU_TX_RATES" },
                { IPW_CMD_SET_POWER_MODE,       "SET_POWER_MODE" },
                { IPW_CMD_SET_RTS_THRESHOLD,    "SET_RTS_THRESHOLD" },
                { IPW_CMD_SET_SCAN_OPTIONS,     "SET_SCAN_OPTIONS" },
                { IPW_CMD_SET_SECURITY_INFO,    "SET_SECURITY_INFO" },
                { IPW_CMD_SET_TX_POWER_INDEX,   "SET_TX_POWER_INDEX" },
                { IPW_CMD_SET_TX_RATES,         "SET_TX_RATES" },
                { IPW_CMD_SET_WEP_FLAGS,        "SET_WEP_FLAGS" },
                { IPW_CMD_SET_WEP_KEY,          "SET_WEP_KEY" },
                { IPW_CMD_SET_WEP_KEY_INDEX,    "SET_WEP_KEY_INDEX" },
                { IPW_CMD_SET_WPA_IE,           "SET_WPA_IE" },

        };
        static char buf[12];
        int i;

        for (i = 0; i < nitems(cmds); i++)
                if (cmds[i].cmd == cmd)
                        return cmds[i].name;
        snprintf(buf, sizeof(buf), "%u", cmd);
        return buf;
}

/*
 * Send a command to the firmware and wait for the acknowledgement.
 */
static int
ipw_cmd(struct ipw_softc *sc, uint32_t type, void *data, uint32_t len)
{
        struct ipw_soft_bd *sbd;
        bus_addr_t physaddr;
        int error;

        IPW_LOCK_ASSERT(sc);

        if (sc->flags & IPW_FLAG_BUSY) {
                device_printf(sc->sc_dev, "%s: %s not sent, busy\n",
                        __func__, ipw_cmdname(type));
                return EAGAIN;
        }
        sc->flags |= IPW_FLAG_BUSY;

        sbd = &sc->stbd_list[sc->txcur];

        error = bus_dmamap_load(sc->cmd_dmat, sc->cmd_map, &sc->cmd,
            sizeof (struct ipw_cmd), ipw_dma_map_addr, &physaddr, 0);
        if (error != 0) {
                device_printf(sc->sc_dev, "could not map command DMA memory\n");
                sc->flags &= ~IPW_FLAG_BUSY;
                return error;
        }

        sc->cmd.type = htole32(type);
        sc->cmd.subtype = 0;
        sc->cmd.len = htole32(len);
        sc->cmd.seq = 0;
        memcpy(sc->cmd.data, data, len);

        sbd->type = IPW_SBD_TYPE_COMMAND;
        sbd->bd->physaddr = htole32(physaddr);
        sbd->bd->len = htole32(sizeof (struct ipw_cmd));
        sbd->bd->nfrag = 1;
        sbd->bd->flags = IPW_BD_FLAG_TX_FRAME_COMMAND |
            IPW_BD_FLAG_TX_LAST_FRAGMENT;

        bus_dmamap_sync(sc->cmd_dmat, sc->cmd_map, BUS_DMASYNC_PREWRITE);
        bus_dmamap_sync(sc->tbd_dmat, sc->tbd_map, BUS_DMASYNC_PREWRITE);

#ifdef IPW_DEBUG
        if (ipw_debug >= 4) {
                printf("sending %s(%u, %u, %u, %u)", ipw_cmdname(type), type,
                    0, 0, len);
                /* Print the data buffer in the higher debug level */
                if (ipw_debug >= 9 && len > 0) {
                        printf(" data: 0x");
                        for (int i = 1; i <= len; i++)
                                printf("%1D", (u_char *)data + len - i, "");
                }
                printf("\n");
        }
#endif

        /* kick firmware */
        sc->txfree--;
        sc->txcur = (sc->txcur + 1) % IPW_NTBD;
        CSR_WRITE_4(sc, IPW_CSR_TX_WRITE, sc->txcur);

        /* wait at most one second for command to complete */
        error = msleep(sc, &sc->sc_mtx, 0, "ipwcmd", hz);
        if (error != 0) {
                device_printf(sc->sc_dev, "%s: %s failed, timeout (error %u)\n",
                    __func__, ipw_cmdname(type), error);
                sc->flags &= ~IPW_FLAG_BUSY;
                return (error);
        }
        return (0);
}

static int
ipw_tx_start(struct ipw_softc *sc, struct mbuf *m0, struct ieee80211_node *ni)
{
        struct ieee80211com *ic = &sc->sc_ic;
        struct ieee80211vap *vap = ni->ni_vap;
        struct ieee80211_frame *wh;
        struct ipw_soft_bd *sbd;
        struct ipw_soft_hdr *shdr;
        struct ipw_soft_buf *sbuf;
        struct ieee80211_key *k;
        struct mbuf *mnew;
        bus_dma_segment_t segs[IPW_MAX_NSEG];
        bus_addr_t physaddr;
        int nsegs, error, i;

        wh = mtod(m0, struct ieee80211_frame *);

        ieee80211_output_seqno_assign(ni, -1, m0);
        if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) {
                k = ieee80211_crypto_encap(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 (ieee80211_radiotap_active_vap(vap)) {
                struct ipw_tx_radiotap_header *tap = &sc->sc_txtap;

                tap->wt_flags = 0;

                ieee80211_radiotap_tx(vap, m0);
        }

        shdr = SLIST_FIRST(&sc->free_shdr);
        sbuf = SLIST_FIRST(&sc->free_sbuf);
        KASSERT(shdr != NULL && sbuf != NULL, ("empty sw hdr/buf pool"));

        shdr->hdr.type = htole32(IPW_HDR_TYPE_SEND);
        shdr->hdr.subtype = 0;
        shdr->hdr.encrypted = (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) ? 1 : 0;
        shdr->hdr.encrypt = 0;
        shdr->hdr.keyidx = 0;
        shdr->hdr.keysz = 0;
        shdr->hdr.fragmentsz = 0;
        IEEE80211_ADDR_COPY(shdr->hdr.src_addr, wh->i_addr2);
        if (ic->ic_opmode == IEEE80211_M_STA)
                IEEE80211_ADDR_COPY(shdr->hdr.dst_addr, wh->i_addr3);
        else
                IEEE80211_ADDR_COPY(shdr->hdr.dst_addr, wh->i_addr1);

        /* trim IEEE802.11 header */
        m_adj(m0, sizeof (struct ieee80211_frame));

        error = bus_dmamap_load_mbuf_sg(sc->txbuf_dmat, sbuf->map, m0, segs,
            &nsegs, 0);
        if (error != 0 && error != EFBIG) {
                device_printf(sc->sc_dev, "could not map mbuf (error %d)\n",
                    error);
                m_freem(m0);
                return error;
        }
        if (error != 0) {
                mnew = m_defrag(m0, M_NOWAIT);
                if (mnew == NULL) {
                        device_printf(sc->sc_dev,
                            "could not defragment mbuf\n");
                        m_freem(m0);
                        return ENOBUFS;
                }
                m0 = mnew;

                error = bus_dmamap_load_mbuf_sg(sc->txbuf_dmat, sbuf->map, m0,
                    segs, &nsegs, 0);
                if (error != 0) {
                        device_printf(sc->sc_dev,
                            "could not map mbuf (error %d)\n", error);
                        m_freem(m0);
                        return error;
                }
        }

        error = bus_dmamap_load(sc->hdr_dmat, shdr->map, &shdr->hdr,
            sizeof (struct ipw_hdr), ipw_dma_map_addr, &physaddr, 0);
        if (error != 0) {
                device_printf(sc->sc_dev, "could not map header DMA memory\n");
                bus_dmamap_unload(sc->txbuf_dmat, sbuf->map);
                m_freem(m0);
                return error;
        }

        SLIST_REMOVE_HEAD(&sc->free_sbuf, next);
        SLIST_REMOVE_HEAD(&sc->free_shdr, next);

        sbd = &sc->stbd_list[sc->txcur];
        sbd->type = IPW_SBD_TYPE_HEADER;
        sbd->priv = shdr;
        sbd->bd->physaddr = htole32(physaddr);
        sbd->bd->len = htole32(sizeof (struct ipw_hdr));
        sbd->bd->nfrag = 1 + nsegs;
        sbd->bd->flags = IPW_BD_FLAG_TX_FRAME_802_3 |
            IPW_BD_FLAG_TX_NOT_LAST_FRAGMENT;

        DPRINTFN(5, ("sending tx hdr (%u, %u, %u, %u, %6D, %6D)\n",
            shdr->hdr.type, shdr->hdr.subtype, shdr->hdr.encrypted,
            shdr->hdr.encrypt, shdr->hdr.src_addr, ":", shdr->hdr.dst_addr,
            ":"));

        sc->txfree--;
        sc->txcur = (sc->txcur + 1) % IPW_NTBD;

        sbuf->m = m0;
        sbuf->ni = ni;

        for (i = 0; i < nsegs; i++) {
                sbd = &sc->stbd_list[sc->txcur];

                sbd->bd->physaddr = htole32(segs[i].ds_addr);
                sbd->bd->len = htole32(segs[i].ds_len);
                sbd->bd->nfrag = 0;
                sbd->bd->flags = IPW_BD_FLAG_TX_FRAME_802_3;
                if (i == nsegs - 1) {
                        sbd->type = IPW_SBD_TYPE_DATA;
                        sbd->priv = sbuf;
                        sbd->bd->flags |= IPW_BD_FLAG_TX_LAST_FRAGMENT;
                } else {
                        sbd->type = IPW_SBD_TYPE_NOASSOC;
                        sbd->bd->flags |= IPW_BD_FLAG_TX_NOT_LAST_FRAGMENT;
                }

                DPRINTFN(5, ("sending fragment (%d)\n", i));

                sc->txfree--;
                sc->txcur = (sc->txcur + 1) % IPW_NTBD;
        }

        bus_dmamap_sync(sc->hdr_dmat, shdr->map, BUS_DMASYNC_PREWRITE);
        bus_dmamap_sync(sc->txbuf_dmat, sbuf->map, BUS_DMASYNC_PREWRITE);
        bus_dmamap_sync(sc->tbd_dmat, sc->tbd_map, BUS_DMASYNC_PREWRITE);

        /* kick firmware */
        CSR_WRITE_4(sc, IPW_CSR_TX_WRITE, sc->txcur);

        return 0;
}

static int
ipw_raw_xmit(struct ieee80211_node *ni, struct mbuf *m,
        const struct ieee80211_bpf_params *params)
{
        /* no support; just discard */
        m_freem(m);
        ieee80211_free_node(ni);
        return 0;
}

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

        IPW_LOCK(sc);
        if ((sc->flags & IPW_FLAG_RUNNING) == 0) {
                IPW_UNLOCK(sc);
                return (ENXIO);
        }
        error = mbufq_enqueue(&sc->sc_snd, m);
        if (error) {
                IPW_UNLOCK(sc);
                return (error);
        }
        ipw_start(sc);
        IPW_UNLOCK(sc);
        return (0);
}

static void
ipw_start(struct ipw_softc *sc)
{
        struct ieee80211_node *ni;
        struct mbuf *m;

        IPW_LOCK_ASSERT(sc);

        while (sc->txfree >= 1 + IPW_MAX_NSEG &&
            (m = mbufq_dequeue(&sc->sc_snd)) != NULL) {
                ni = (struct ieee80211_node *) m->m_pkthdr.rcvif;
                if (ipw_tx_start(sc, m, ni) != 0) {
                        if_inc_counter(ni->ni_vap->iv_ifp,
                            IFCOUNTER_OERRORS, 1);
                        ieee80211_free_node(ni);
                        break;
                }
                /* start watchdog timer */
                sc->sc_tx_timer = 5;
        }
}

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

        IPW_LOCK_ASSERT(sc);

        if (sc->sc_tx_timer > 0) {
                if (--sc->sc_tx_timer == 0) {
                        device_printf(sc->sc_dev, "device timeout\n");
                        counter_u64_add(ic->ic_oerrors, 1);
                        taskqueue_enqueue(taskqueue_swi, &sc->sc_init_task);
                }
        }
        if (sc->sc_scan_timer > 0) {
                if (--sc->sc_scan_timer == 0) {
                        DPRINTFN(3, ("Scan timeout\n"));
                        /* End the scan */
                        if (sc->flags & IPW_FLAG_SCANNING) {
                                IPW_UNLOCK(sc);
                                ieee80211_scan_done(TAILQ_FIRST(&ic->ic_vaps));
                                IPW_LOCK(sc);
                                sc->flags &= ~IPW_FLAG_SCANNING;
                        }
                }
        }
        if (sc->flags & IPW_FLAG_RUNNING)
                callout_reset(&sc->sc_wdtimer, hz, ipw_watchdog, sc);
}

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

        IPW_LOCK(sc);
        if (ic->ic_nrunning > 0) {
                if (!(sc->flags & IPW_FLAG_RUNNING)) {
                        ipw_init_locked(sc);
                        startall = 1;
                }
        } else if (sc->flags & IPW_FLAG_RUNNING)
                ipw_stop_locked(sc);
        IPW_UNLOCK(sc);
        if (startall)
                ieee80211_start_all(ic);
}

static void
ipw_stop_master(struct ipw_softc *sc)
{
        uint32_t tmp;
        int ntries;

        /* disable interrupts */
        CSR_WRITE_4(sc, IPW_CSR_INTR_MASK, 0);

        CSR_WRITE_4(sc, IPW_CSR_RST, IPW_RST_STOP_MASTER);
        for (ntries = 0; ntries < 50; ntries++) {
                if (CSR_READ_4(sc, IPW_CSR_RST) & IPW_RST_MASTER_DISABLED)
                        break;
                DELAY(10);
        }
        if (ntries == 50)
                device_printf(sc->sc_dev, "timeout waiting for master\n");

        tmp = CSR_READ_4(sc, IPW_CSR_RST);
        CSR_WRITE_4(sc, IPW_CSR_RST, tmp | IPW_RST_PRINCETON_RESET);

        /* Clear all flags except the following */
        sc->flags &= IPW_FLAG_HAS_RADIO_SWITCH;
}

static int
ipw_reset(struct ipw_softc *sc)
{
        uint32_t tmp;
        int ntries;

        ipw_stop_master(sc);

        /* move adapter to D0 state */
        tmp = CSR_READ_4(sc, IPW_CSR_CTL);
        CSR_WRITE_4(sc, IPW_CSR_CTL, tmp | IPW_CTL_INIT);

        /* wait for clock stabilization */
        for (ntries = 0; ntries < 1000; ntries++) {
                if (CSR_READ_4(sc, IPW_CSR_CTL) & IPW_CTL_CLOCK_READY)
                        break;
                DELAY(200);
        }
        if (ntries == 1000)
                return EIO;

        tmp =  CSR_READ_4(sc, IPW_CSR_RST);
        CSR_WRITE_4(sc, IPW_CSR_RST, tmp | IPW_RST_SW_RESET);

        DELAY(10);

        tmp = CSR_READ_4(sc, IPW_CSR_CTL);
        CSR_WRITE_4(sc, IPW_CSR_CTL, tmp | IPW_CTL_INIT);

        return 0;
}

static int
ipw_waitfordisable(struct ipw_softc *sc, int waitfor)
{
        int ms = hz < 1000 ? 1 : hz/10;
        int i, error;

        for (i = 0; i < 100; i++) {
                if (ipw_read_table1(sc, IPW_INFO_CARD_DISABLED) == waitfor)
                        return 0;
                error = msleep(sc, &sc->sc_mtx, PCATCH, __func__, ms);
                if (error == 0 || error != EWOULDBLOCK)
                        return 0;
        }
        DPRINTF(("%s: timeout waiting for %s\n",
                __func__, waitfor ? "disable" : "enable"));
        return ETIMEDOUT;
}

static int
ipw_enable(struct ipw_softc *sc)
{
        int error;

        if ((sc->flags & IPW_FLAG_ENABLED) == 0) {
                DPRINTF(("Enable adapter\n"));
                error = ipw_cmd(sc, IPW_CMD_ENABLE, NULL, 0);
                if (error != 0)
                        return error;
                error = ipw_waitfordisable(sc, 0);
                if (error != 0)
                        return error;
                sc->flags |= IPW_FLAG_ENABLED;
        }
        return 0;
}

static int
ipw_disable(struct ipw_softc *sc)
{
        int error;

        if (sc->flags & IPW_FLAG_ENABLED) {
                DPRINTF(("Disable adapter\n"));
                error = ipw_cmd(sc, IPW_CMD_DISABLE, NULL, 0);
                if (error != 0)
                        return error;
                error = ipw_waitfordisable(sc, 1);
                if (error != 0)
                        return error;
                sc->flags &= ~IPW_FLAG_ENABLED;
        }
        return 0;
}

/*
 * Upload the microcode to the device.
 */
static int
ipw_load_ucode(struct ipw_softc *sc, const char *uc, int size)
{
        int ntries;

        MEM_WRITE_4(sc, 0x3000e0, 0x80000000);
        CSR_WRITE_4(sc, IPW_CSR_RST, 0);

        MEM_WRITE_2(sc, 0x220000, 0x0703);
        MEM_WRITE_2(sc, 0x220000, 0x0707);

        MEM_WRITE_1(sc, 0x210014, 0x72);
        MEM_WRITE_1(sc, 0x210014, 0x72);

        MEM_WRITE_1(sc, 0x210000, 0x40);
        MEM_WRITE_1(sc, 0x210000, 0x00);
        MEM_WRITE_1(sc, 0x210000, 0x40);

        MEM_WRITE_MULTI_1(sc, 0x210010, uc, size);

        MEM_WRITE_1(sc, 0x210000, 0x00);
        MEM_WRITE_1(sc, 0x210000, 0x00);
        MEM_WRITE_1(sc, 0x210000, 0x80);

        MEM_WRITE_2(sc, 0x220000, 0x0703);
        MEM_WRITE_2(sc, 0x220000, 0x0707);

        MEM_WRITE_1(sc, 0x210014, 0x72);
        MEM_WRITE_1(sc, 0x210014, 0x72);

        MEM_WRITE_1(sc, 0x210000, 0x00);
        MEM_WRITE_1(sc, 0x210000, 0x80);

        for (ntries = 0; ntries < 10; ntries++) {
                if (MEM_READ_1(sc, 0x210000) & 1)
                        break;
                DELAY(10);
        }
        if (ntries == 10) {
                device_printf(sc->sc_dev,
                    "timeout waiting for ucode to initialize\n");
                return EIO;
        }

        MEM_WRITE_4(sc, 0x3000e0, 0);

        return 0;
}

/* set of macros to handle unaligned little endian data in firmware image */
#define GETLE32(p) ((p)[0] | (p)[1] << 8 | (p)[2] << 16 | (p)[3] << 24)
#define GETLE16(p) ((p)[0] | (p)[1] << 8)
static int
ipw_load_firmware(struct ipw_softc *sc, const char *fw, int size)
{
        const uint8_t *p, *end;
        uint32_t tmp, dst;
        uint16_t len;
        int error;

        p = fw;
        end = fw + size;
        while (p < end) {
                dst = GETLE32(p); p += 4;
                len = GETLE16(p); p += 2;

                ipw_write_mem_1(sc, dst, p, len);
                p += len;
        }

        CSR_WRITE_4(sc, IPW_CSR_IO, IPW_IO_GPIO1_ENABLE | IPW_IO_GPIO3_MASK |
            IPW_IO_LED_OFF);

        /* enable interrupts */
        CSR_WRITE_4(sc, IPW_CSR_INTR_MASK, IPW_INTR_MASK);

        /* kick the firmware */
        CSR_WRITE_4(sc, IPW_CSR_RST, 0);

        tmp = CSR_READ_4(sc, IPW_CSR_CTL);
        CSR_WRITE_4(sc, IPW_CSR_CTL, tmp | IPW_CTL_ALLOW_STANDBY);

        /* wait at most one second for firmware initialization to complete */
        if ((error = msleep(sc, &sc->sc_mtx, 0, "ipwinit", hz)) != 0) {
                device_printf(sc->sc_dev, "timeout waiting for firmware "
                    "initialization to complete\n");
                return error;
        }

        tmp = CSR_READ_4(sc, IPW_CSR_IO);
        CSR_WRITE_4(sc, IPW_CSR_IO, tmp | IPW_IO_GPIO1_MASK |
            IPW_IO_GPIO3_MASK);

        return 0;
}

static int
ipw_setwepkeys(struct ipw_softc *sc)
{
        struct ieee80211com *ic = &sc->sc_ic;
        struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps);
        struct ipw_wep_key wepkey;
        struct ieee80211_key *wk;
        int error, i;

        for (i = 0; i < IEEE80211_WEP_NKID; i++) {
                wk = &vap->iv_nw_keys[i];

                if (wk->wk_cipher == NULL ||
                    wk->wk_cipher->ic_cipher != IEEE80211_CIPHER_WEP)
                        continue;

                wepkey.idx = i;
                wepkey.len = ieee80211_crypto_get_key_len(wk);
                memset(wepkey.key, 0, sizeof wepkey.key);
                memcpy(wepkey.key, ieee80211_crypto_get_key_data(wk),
                    ieee80211_crypto_get_key_len(wk));
                DPRINTF(("Setting wep key index %u len %u\n", wepkey.idx,
                    wepkey.len));
                error = ipw_cmd(sc, IPW_CMD_SET_WEP_KEY, &wepkey,
                    sizeof wepkey);
                if (error != 0)
                        return error;
        }
        return 0;
}

static int
ipw_setwpaie(struct ipw_softc *sc, const void *ie, int ielen)
{
        struct ipw_wpa_ie wpaie;

        memset(&wpaie, 0, sizeof(wpaie));
        wpaie.len = htole32(ielen);
        /* XXX verify length */
        memcpy(&wpaie.ie, ie, ielen);
        DPRINTF(("Setting WPA IE\n"));
        return ipw_cmd(sc, IPW_CMD_SET_WPA_IE, &wpaie, sizeof(wpaie));
}

static int
ipw_setbssid(struct ipw_softc *sc, uint8_t *bssid)
{
        static const uint8_t zerobssid[IEEE80211_ADDR_LEN];

        if (bssid == NULL || bcmp(bssid, zerobssid, IEEE80211_ADDR_LEN) == 0) {
                DPRINTF(("Setting mandatory BSSID to null\n"));
                return ipw_cmd(sc, IPW_CMD_SET_MANDATORY_BSSID, NULL, 0);
        } else {
                DPRINTF(("Setting mandatory BSSID to %6D\n", bssid, ":"));
                return ipw_cmd(sc, IPW_CMD_SET_MANDATORY_BSSID,
                        bssid, IEEE80211_ADDR_LEN);
        }
}

static int
ipw_setssid(struct ipw_softc *sc, void *ssid, size_t ssidlen)
{
        if (ssidlen == 0) {
                /*
                 * A bug in the firmware breaks the ``don't associate''
                 * bit in the scan options command.  To compensate for
                 * this install a bogus ssid when no ssid is specified
                 * so the firmware won't try to associate.
                 */
                DPRINTF(("Setting bogus ESSID to WAR firmware bug\n"));
                return ipw_cmd(sc, IPW_CMD_SET_ESSID,
                        "\x18\x19\x20\x21\x22\x23\x24\x25\x26\x27"
                        "\x28\x29\x2a\x2b\x2c\x2d\x2e\x2f\x30\x31"
                        "\x32\x33\x34\x35\x36\x37\x38\x39\x3a\x3b"
                        "\x3c\x3d", IEEE80211_NWID_LEN);
        } else {
#ifdef IPW_DEBUG
                if (ipw_debug > 0) {
                        printf("Setting ESSID to ");
                        ieee80211_print_essid(ssid, ssidlen);
                        printf("\n");
                }
#endif
                return ipw_cmd(sc, IPW_CMD_SET_ESSID, ssid, ssidlen);
        }
}

static int
ipw_setscanopts(struct ipw_softc *sc, uint32_t chanmask, uint32_t flags)
{
        struct ipw_scan_options opts;

        DPRINTF(("Scan options: mask 0x%x flags 0x%x\n", chanmask, flags));
        opts.channels = htole32(chanmask);
        opts.flags = htole32(flags);
        return ipw_cmd(sc, IPW_CMD_SET_SCAN_OPTIONS, &opts, sizeof(opts));
}

static int
ipw_scan(struct ipw_softc *sc)
{
        uint32_t params;
        int error;

        DPRINTF(("%s: flags 0x%x\n", __func__, sc->flags));

        if (sc->flags & IPW_FLAG_SCANNING)
                return (EBUSY);
        sc->flags |= IPW_FLAG_SCANNING | IPW_FLAG_HACK;

        /* NB: IPW_SCAN_DO_NOT_ASSOCIATE does not work (we set it anyway) */
        error = ipw_setscanopts(sc, 0x3fff, IPW_SCAN_DO_NOT_ASSOCIATE);
        if (error != 0)
                goto done;

        /*
         * Setup null/bogus ssid so firmware doesn't use any previous
         * ssid to try and associate.  This is because the ``don't
         * associate'' option bit is broken (sigh).
         */
        error = ipw_setssid(sc, NULL, 0);
        if (error != 0)
                goto done;

        /*
         * NB: the adapter may be disabled on association lost;
         *     if so just re-enable it to kick off scanning.
         */
        DPRINTF(("Starting scan\n"));
        sc->sc_scan_timer = 3;
        if (sc->flags & IPW_FLAG_ENABLED) {
                params = 0;                             /* XXX? */
                error = ipw_cmd(sc, IPW_CMD_BROADCAST_SCAN,
                                &params, sizeof(params));
        } else
                error = ipw_enable(sc);
done:
        if (error != 0) {
                DPRINTF(("Scan failed\n"));
                sc->flags &= ~(IPW_FLAG_SCANNING | IPW_FLAG_HACK);
        }
        return (error);
}

static int
ipw_setchannel(struct ipw_softc *sc, struct ieee80211_channel *chan)
{
        struct ieee80211com *ic = &sc->sc_ic;
        uint32_t data;
        int error;

        data = htole32(ieee80211_chan2ieee(ic, chan));
        DPRINTF(("Setting channel to %u\n", le32toh(data)));
        error = ipw_cmd(sc, IPW_CMD_SET_CHANNEL, &data, sizeof data);
        if (error == 0)
                ipw_setcurchan(sc, chan);
        return error;
}

static void
ipw_assoc(struct ieee80211com *ic, struct ieee80211vap *vap)
{
        struct ipw_softc *sc = ic->ic_softc;
        struct ieee80211_node *ni = vap->iv_bss;
        struct ipw_security security;
        uint32_t data;
        int error;

        IPW_LOCK(sc);
        error = ipw_disable(sc);
        if (error != 0)
                goto done;

        memset(&security, 0, sizeof security);
        security.authmode = (ni->ni_authmode == IEEE80211_AUTH_SHARED) ?
            IPW_AUTH_SHARED : IPW_AUTH_OPEN;
        security.ciphers = htole32(IPW_CIPHER_NONE);
        DPRINTF(("Setting authmode to %u\n", security.authmode));
        error = ipw_cmd(sc, IPW_CMD_SET_SECURITY_INFO, &security,
            sizeof security);
        if (error != 0)
                goto done;

        data = htole32(vap->iv_rtsthreshold);
        DPRINTF(("Setting RTS threshold to %u\n", le32toh(data)));
        error = ipw_cmd(sc, IPW_CMD_SET_RTS_THRESHOLD, &data, sizeof data);
        if (error != 0)
                goto done;

        data = htole32(vap->iv_fragthreshold);
        DPRINTF(("Setting frag threshold to %u\n", le32toh(data)));
        error = ipw_cmd(sc, IPW_CMD_SET_FRAG_THRESHOLD, &data, sizeof data);
        if (error != 0)
                goto done;

        if (vap->iv_flags & IEEE80211_F_PRIVACY) {
                error = ipw_setwepkeys(sc);
                if (error != 0)
                        goto done;

                if (vap->iv_def_txkey != IEEE80211_KEYIX_NONE) {
                        data = htole32(vap->iv_def_txkey);
                        DPRINTF(("Setting wep tx key index to %u\n",
                                le32toh(data)));
                        error = ipw_cmd(sc, IPW_CMD_SET_WEP_KEY_INDEX, &data,
                            sizeof data);
                        if (error != 0)
                                goto done;
                }
        }

        data = htole32((vap->iv_flags & IEEE80211_F_PRIVACY) ? IPW_WEPON : 0);
        DPRINTF(("Setting wep flags to 0x%x\n", le32toh(data)));
        error = ipw_cmd(sc, IPW_CMD_SET_WEP_FLAGS, &data, sizeof data);
        if (error != 0)
                goto done;

        error = ipw_setssid(sc, ni->ni_essid, ni->ni_esslen);
        if (error != 0)
                goto done;

        error = ipw_setbssid(sc, ni->ni_bssid);
        if (error != 0)
                goto done;

        if (vap->iv_appie_wpa != NULL) {
                struct ieee80211_appie *ie = vap->iv_appie_wpa;
                error = ipw_setwpaie(sc, ie->ie_data, ie->ie_len);
                if (error != 0)
                        goto done;
        }
        if (ic->ic_opmode == IEEE80211_M_IBSS) {
                error = ipw_setchannel(sc, ni->ni_chan);
                if (error != 0)
                        goto done;
        }

        /* lock scan to ap's channel and enable associate */
        error = ipw_setscanopts(sc,
            1<<(ieee80211_chan2ieee(ic, ni->ni_chan)-1), 0);
        if (error != 0)
                goto done;

        error = ipw_enable(sc);         /* finally, enable adapter */
        if (error == 0)
                sc->flags |= IPW_FLAG_ASSOCIATING;
done:
        IPW_UNLOCK(sc);
}

static void
ipw_disassoc(struct ieee80211com *ic, struct ieee80211vap *vap)
{
        struct ieee80211_node *ni = vap->iv_bss;
        struct ipw_softc *sc = ic->ic_softc;

        IPW_LOCK(sc);
        DPRINTF(("Disassociate from %6D\n", ni->ni_bssid, ":"));
        /*
         * NB: don't try to do this if ipw_stop_master has
         *     shutdown the firmware and disabled interrupts.
         */
        if (sc->flags & IPW_FLAG_FW_INITED) {
                sc->flags &= ~IPW_FLAG_ASSOCIATED;
                /*
                 * NB: firmware currently ignores bssid parameter, but
                 *     supply it in case this changes (follow linux driver).
                 */
                (void) ipw_cmd(sc, IPW_CMD_DISASSOCIATE,
                        ni->ni_bssid, IEEE80211_ADDR_LEN);
        }
        IPW_UNLOCK(sc);
}

/*
 * Handler for sc_init_task.  This is a simple wrapper around ipw_init().
 * It is called on firmware panics or on watchdog timeouts.
 */
static void
ipw_init_task(void *context, int pending)
{
        ipw_init(context);
}

static void
ipw_init(void *priv)
{
        struct ipw_softc *sc = priv;
        struct ieee80211com *ic = &sc->sc_ic;

        IPW_LOCK(sc);
        ipw_init_locked(sc);
        IPW_UNLOCK(sc);

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

static void
ipw_init_locked(struct ipw_softc *sc)
{
        struct ieee80211com *ic = &sc->sc_ic;
        struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps);
        const struct firmware *fp;
        const struct ipw_firmware_hdr *hdr;
        const char *fw;

        IPW_LOCK_ASSERT(sc);

        DPRINTF(("%s: state %s flags 0x%x\n", __func__,
                ieee80211_state_name[vap->iv_state], sc->flags));

        /*
         * Avoid re-entrant calls.  We need to release the mutex in ipw_init()
         * when loading the firmware and we don't want to be called during this
         * operation.
         */
        if (sc->flags & IPW_FLAG_INIT_LOCKED)
                return;
        sc->flags |= IPW_FLAG_INIT_LOCKED;

        ipw_stop_locked(sc);

        if (ipw_reset(sc) != 0) {
                device_printf(sc->sc_dev, "could not reset adapter\n");
                goto fail;
        }

        if (sc->sc_firmware == NULL) {
                device_printf(sc->sc_dev, "no firmware\n");
                goto fail;
        }
        /* NB: consistency already checked on load */
        fp = sc->sc_firmware;
        hdr = (const struct ipw_firmware_hdr *)fp->data;

        DPRINTF(("Loading firmware image '%s'\n", fp->name));
        fw = (const char *)fp->data + sizeof *hdr + le32toh(hdr->mainsz);
        if (ipw_load_ucode(sc, fw, le32toh(hdr->ucodesz)) != 0) {
                device_printf(sc->sc_dev, "could not load microcode\n");
                goto fail;
        }

        ipw_stop_master(sc);

        /*
         * Setup tx, rx and status rings.
         */
        sc->txold = IPW_NTBD - 1;
        sc->txcur = 0;
        sc->txfree = IPW_NTBD - 2;
        sc->rxcur = IPW_NRBD - 1;

        CSR_WRITE_4(sc, IPW_CSR_TX_BASE,  sc->tbd_phys);
        CSR_WRITE_4(sc, IPW_CSR_TX_SIZE,  IPW_NTBD);
        CSR_WRITE_4(sc, IPW_CSR_TX_READ,  0);
        CSR_WRITE_4(sc, IPW_CSR_TX_WRITE, sc->txcur);

        CSR_WRITE_4(sc, IPW_CSR_RX_BASE,  sc->rbd_phys);
        CSR_WRITE_4(sc, IPW_CSR_RX_SIZE,  IPW_NRBD);
        CSR_WRITE_4(sc, IPW_CSR_RX_READ,  0);
        CSR_WRITE_4(sc, IPW_CSR_RX_WRITE, sc->rxcur);

        CSR_WRITE_4(sc, IPW_CSR_STATUS_BASE, sc->status_phys);

        fw = (const char *)fp->data + sizeof *hdr;
        if (ipw_load_firmware(sc, fw, le32toh(hdr->mainsz)) != 0) {
                device_printf(sc->sc_dev, "could not load firmware\n");
                goto fail;
        }

        sc->flags |= IPW_FLAG_FW_INITED;

        /* retrieve information tables base addresses */
        sc->table1_base = CSR_READ_4(sc, IPW_CSR_TABLE1_BASE);
        sc->table2_base = CSR_READ_4(sc, IPW_CSR_TABLE2_BASE);

        ipw_write_table1(sc, IPW_INFO_LOCK, 0);

        if (ipw_config(sc) != 0) {
                device_printf(sc->sc_dev, "device configuration failed\n");
                goto fail;
        }

        callout_reset(&sc->sc_wdtimer, hz, ipw_watchdog, sc);
        sc->flags |= IPW_FLAG_RUNNING;
        sc->flags &= ~IPW_FLAG_INIT_LOCKED;
        return;

fail:
        ipw_stop_locked(sc);
        sc->flags &= ~IPW_FLAG_INIT_LOCKED;
}

static int
ipw_config(struct ipw_softc *sc)
{
        struct ieee80211com *ic = &sc->sc_ic;
        struct ipw_configuration config;
        uint32_t data;
        int error;

        error = ipw_disable(sc);
        if (error != 0)
                return error;

        switch (ic->ic_opmode) {
        case IEEE80211_M_STA:
        case IEEE80211_M_HOSTAP:
        case IEEE80211_M_WDS:           /* XXX */
                data = htole32(IPW_MODE_BSS);
                break;
        case IEEE80211_M_IBSS:
        case IEEE80211_M_AHDEMO:
                data = htole32(IPW_MODE_IBSS);
                break;
        case IEEE80211_M_MONITOR:
                data = htole32(IPW_MODE_MONITOR);
                break;
        default:
                device_printf(sc->sc_dev, "unknown opmode %d\n", ic->ic_opmode);
                return EINVAL;
        }
        DPRINTF(("Setting mode to %u\n", le32toh(data)));
        error = ipw_cmd(sc, IPW_CMD_SET_MODE, &data, sizeof data);
        if (error != 0)
                return error;

        if (ic->ic_opmode == IEEE80211_M_IBSS ||
            ic->ic_opmode == IEEE80211_M_MONITOR) {
                error = ipw_setchannel(sc, ic->ic_curchan);
                if (error != 0)
                        return error;
        }

        if (ic->ic_opmode == IEEE80211_M_MONITOR)
                return ipw_enable(sc);

        config.flags = htole32(IPW_CFG_BSS_MASK | IPW_CFG_IBSS_MASK |
            IPW_CFG_PREAMBLE_AUTO | IPW_CFG_802_1x_ENABLE);
        if (ic->ic_opmode == IEEE80211_M_IBSS)
                config.flags |= htole32(IPW_CFG_IBSS_AUTO_START);
        if (ic->ic_promisc > 0)
                config.flags |= htole32(IPW_CFG_PROMISCUOUS);
        config.bss_chan = htole32(0x3fff); /* channels 1-14 */
        config.ibss_chan = htole32(0x7ff); /* channels 1-11 */
        DPRINTF(("Setting configuration to 0x%x\n", le32toh(config.flags)));
        error = ipw_cmd(sc, IPW_CMD_SET_CONFIGURATION, &config, sizeof config);
        if (error != 0)
                return error;

        data = htole32(0xf); /* 1, 2, 5.5, 11 */
        DPRINTF(("Setting basic tx rates to 0x%x\n", le32toh(data)));
        error = ipw_cmd(sc, IPW_CMD_SET_BASIC_TX_RATES, &data, sizeof data);
        if (error != 0)
                return error;

        /* Use the same rate set */
        DPRINTF(("Setting msdu tx rates to 0x%x\n", le32toh(data)));
        error = ipw_cmd(sc, IPW_CMD_SET_MSDU_TX_RATES, &data, sizeof data);
        if (error != 0)
                return error;

        /* Use the same rate set */
        DPRINTF(("Setting tx rates to 0x%x\n", le32toh(data)));
        error = ipw_cmd(sc, IPW_CMD_SET_TX_RATES, &data, sizeof data);
        if (error != 0)
                return error;

        data = htole32(IPW_POWER_MODE_CAM);
        DPRINTF(("Setting power mode to %u\n", le32toh(data)));
        error = ipw_cmd(sc, IPW_CMD_SET_POWER_MODE, &data, sizeof data);
        if (error != 0)
                return error;

        if (ic->ic_opmode == IEEE80211_M_IBSS) {
                data = htole32(32); /* default value */
                DPRINTF(("Setting tx power index to %u\n", le32toh(data)));
                error = ipw_cmd(sc, IPW_CMD_SET_TX_POWER_INDEX, &data,
                    sizeof data);
                if (error != 0)
                        return error;
        }

        return 0;
}

static void
ipw_stop(void *priv)
{
        struct ipw_softc *sc = priv;

        IPW_LOCK(sc);
        ipw_stop_locked(sc);
        IPW_UNLOCK(sc);
}

static void
ipw_stop_locked(struct ipw_softc *sc)
{
        int i;

        IPW_LOCK_ASSERT(sc);

        callout_stop(&sc->sc_wdtimer);
        ipw_stop_master(sc);

        CSR_WRITE_4(sc, IPW_CSR_RST, IPW_RST_SW_RESET);

        /*
         * Release tx buffers.
         */
        for (i = 0; i < IPW_NTBD; i++)
                ipw_release_sbd(sc, &sc->stbd_list[i]);

        sc->sc_tx_timer = 0;
        sc->flags &= ~IPW_FLAG_RUNNING;
}

static int
ipw_sysctl_stats(SYSCTL_HANDLER_ARGS)
{
        struct ipw_softc *sc = arg1;
        uint32_t i, size, buf[256];

        memset(buf, 0, sizeof buf);

        if (!(sc->flags & IPW_FLAG_FW_INITED))
                return SYSCTL_OUT(req, buf, sizeof buf);

        CSR_WRITE_4(sc, IPW_CSR_AUTOINC_ADDR, sc->table1_base);

        size = min(CSR_READ_4(sc, IPW_CSR_AUTOINC_DATA), 256);
        for (i = 1; i < size; i++)
                buf[i] = MEM_READ_4(sc, CSR_READ_4(sc, IPW_CSR_AUTOINC_DATA));

        return SYSCTL_OUT(req, buf, size);
}

static int
ipw_sysctl_radio(SYSCTL_HANDLER_ARGS)
{
        struct ipw_softc *sc = arg1;
        int val;

        val = !((sc->flags & IPW_FLAG_HAS_RADIO_SWITCH) &&
                (CSR_READ_4(sc, IPW_CSR_IO) & IPW_IO_RADIO_DISABLED));

        return SYSCTL_OUT(req, &val, sizeof val);
}

static uint32_t
ipw_read_table1(struct ipw_softc *sc, uint32_t off)
{
        return MEM_READ_4(sc, MEM_READ_4(sc, sc->table1_base + off));
}

static void
ipw_write_table1(struct ipw_softc *sc, uint32_t off, uint32_t info)
{
        MEM_WRITE_4(sc, MEM_READ_4(sc, sc->table1_base + off), info);
}

#if 0
static int
ipw_read_table2(struct ipw_softc *sc, uint32_t off, void *buf, uint32_t *len)
{
        uint32_t addr, info;
        uint16_t count, size;
        uint32_t total;

        /* addr[4] + count[2] + size[2] */
        addr = MEM_READ_4(sc, sc->table2_base + off);
        info = MEM_READ_4(sc, sc->table2_base + off + 4);

        count = info >> 16;
        size = info & 0xffff;
        total = count * size;

        if (total > *len) {
                *len = total;
                return EINVAL;
        }

        *len = total;
        ipw_read_mem_1(sc, addr, buf, total);

        return 0;
}

static void
ipw_read_mem_1(struct ipw_softc *sc, bus_size_t offset, uint8_t *datap,
    bus_size_t count)
{
        for (; count > 0; offset++, datap++, count--) {
                CSR_WRITE_4(sc, IPW_CSR_INDIRECT_ADDR, offset & ~3);
                *datap = CSR_READ_1(sc, IPW_CSR_INDIRECT_DATA + (offset & 3));
        }
}
#endif

static void
ipw_write_mem_1(struct ipw_softc *sc, bus_size_t offset, const uint8_t *datap,
    bus_size_t count)
{
        for (; count > 0; offset++, datap++, count--) {
                CSR_WRITE_4(sc, IPW_CSR_INDIRECT_ADDR, offset & ~3);
                CSR_WRITE_1(sc, IPW_CSR_INDIRECT_DATA + (offset & 3), *datap);
        }
}

static void
ipw_scan_start(struct ieee80211com *ic)
{
        struct ipw_softc *sc = ic->ic_softc;

        IPW_LOCK(sc);
        ipw_scan(sc);
        IPW_UNLOCK(sc);
}

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

        memset(bands, 0, sizeof(bands));
        setbit(bands, IEEE80211_MODE_11B);

        for (i = 1; i < 16; i++) {
                if (sc->chanmask & (1 << i)) {
                        ieee80211_add_channel(chans, maxchans, nchans,
                            i, 0, 0, 0, bands);
                }
        }

}

static void
ipw_set_channel(struct ieee80211com *ic)
{
        struct ipw_softc *sc = ic->ic_softc;

        IPW_LOCK(sc);
        if (ic->ic_opmode == IEEE80211_M_MONITOR) {
                ipw_disable(sc);
                ipw_setchannel(sc, ic->ic_curchan);
                ipw_enable(sc);
        }
        IPW_UNLOCK(sc);
}

static void
ipw_scan_curchan(struct ieee80211_scan_state *ss, unsigned long maxdwell)
{
        /* NB: all channels are scanned at once */
}

static void
ipw_scan_mindwell(struct ieee80211_scan_state *ss)
{
        /* NB: don't try to abort scan; wait for firmware to finish */
}

static void
ipw_scan_end(struct ieee80211com *ic)
{
        struct ipw_softc *sc = ic->ic_softc;

        IPW_LOCK(sc);
        sc->flags &= ~IPW_FLAG_SCANNING;
        IPW_UNLOCK(sc);
}