xref: /freebsd-11-stable/sys/dev/bwn/if_bwn.c

/*-
 * Copyright (c) 2009-2010 Weongyo Jeong <weongyo@freebsd.org>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer,
 *    without modification.
 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
 *    similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
 *    redistribution must be conditioned upon including a substantially
 *    similar Disclaimer requirement for further binary redistribution.
 *
 * NO WARRANTY
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
 * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR 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 DAMAGES.
 */

#include <sys/cdefs.h>
__FBSDID("$FreeBSD: head/sys/dev/bwn/if_bwn.c 299985 2016-05-16 22:57:36Z adrian $");

/*
 * The Broadcom Wireless LAN controller driver.
 */

#include "opt_bwn.h"
#include "opt_wlan.h"

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/module.h>
#include <sys/endian.h>
#include <sys/errno.h>
#include <sys/firmware.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <machine/bus.h>
#include <machine/resource.h>
#include <sys/bus.h>
#include <sys/rman.h>
#include <sys/socket.h>
#include <sys/sockio.h>

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

#include <dev/pci/pcivar.h>
#include <dev/pci/pcireg.h>
#include <dev/siba/siba_ids.h>
#include <dev/siba/sibareg.h>
#include <dev/siba/sibavar.h>

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

#include <dev/bwn/if_bwnreg.h>
#include <dev/bwn/if_bwnvar.h>

#include <dev/bwn/if_bwn_debug.h>
#include <dev/bwn/if_bwn_misc.h>
#include <dev/bwn/if_bwn_util.h>
#include <dev/bwn/if_bwn_phy_common.h>
#include <dev/bwn/if_bwn_phy_g.h>
#include <dev/bwn/if_bwn_phy_lp.h>

static SYSCTL_NODE(_hw, OID_AUTO, bwn, CTLFLAG_RD, 0,
    "Broadcom driver parameters");

/*
 * Tunable & sysctl variables.
 */

#ifdef BWN_DEBUG
static	int bwn_debug = 0;
SYSCTL_INT(_hw_bwn, OID_AUTO, debug, CTLFLAG_RWTUN, &bwn_debug, 0,
    "Broadcom debugging printfs");
#endif

static int	bwn_bfp = 0;		/* use "Bad Frames Preemption" */
SYSCTL_INT(_hw_bwn, OID_AUTO, bfp, CTLFLAG_RW, &bwn_bfp, 0,
    "uses Bad Frames Preemption");
static int	bwn_bluetooth = 1;
SYSCTL_INT(_hw_bwn, OID_AUTO, bluetooth, CTLFLAG_RW, &bwn_bluetooth, 0,
    "turns on Bluetooth Coexistence");
static int	bwn_hwpctl = 0;
SYSCTL_INT(_hw_bwn, OID_AUTO, hwpctl, CTLFLAG_RW, &bwn_hwpctl, 0,
    "uses H/W power control");
static int	bwn_msi_disable = 0;		/* MSI disabled  */
TUNABLE_INT("hw.bwn.msi_disable", &bwn_msi_disable);
static int	bwn_usedma = 1;
SYSCTL_INT(_hw_bwn, OID_AUTO, usedma, CTLFLAG_RD, &bwn_usedma, 0,
    "uses DMA");
TUNABLE_INT("hw.bwn.usedma", &bwn_usedma);
static int	bwn_wme = 1;
SYSCTL_INT(_hw_bwn, OID_AUTO, wme, CTLFLAG_RW, &bwn_wme, 0,
    "uses WME support");

static void	bwn_attach_pre(struct bwn_softc *);
static int	bwn_attach_post(struct bwn_softc *);
static void	bwn_sprom_bugfixes(device_t);
static int	bwn_init(struct bwn_softc *);
static void	bwn_parent(struct ieee80211com *);
static void	bwn_start(struct bwn_softc *);
static int	bwn_transmit(struct ieee80211com *, struct mbuf *);
static int	bwn_attach_core(struct bwn_mac *);
static int	bwn_phy_getinfo(struct bwn_mac *, int);
static int	bwn_chiptest(struct bwn_mac *);
static int	bwn_setup_channels(struct bwn_mac *, int, int);
static void	bwn_shm_ctlword(struct bwn_mac *, uint16_t,
		    uint16_t);
static void	bwn_addchannels(struct ieee80211_channel [], int, int *,
		    const struct bwn_channelinfo *, const uint8_t []);
static int	bwn_raw_xmit(struct ieee80211_node *, struct mbuf *,
		    const struct ieee80211_bpf_params *);
static void	bwn_updateslot(struct ieee80211com *);
static void	bwn_update_promisc(struct ieee80211com *);
static void	bwn_wme_init(struct bwn_mac *);
static int	bwn_wme_update(struct ieee80211com *);
static void	bwn_wme_clear(struct bwn_softc *);
static void	bwn_wme_load(struct bwn_mac *);
static void	bwn_wme_loadparams(struct bwn_mac *,
		    const struct wmeParams *, uint16_t);
static void	bwn_scan_start(struct ieee80211com *);
static void	bwn_scan_end(struct ieee80211com *);
static void	bwn_set_channel(struct ieee80211com *);
static struct ieee80211vap *bwn_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	bwn_vap_delete(struct ieee80211vap *);
static void	bwn_stop(struct bwn_softc *);
static int	bwn_core_init(struct bwn_mac *);
static void	bwn_core_start(struct bwn_mac *);
static void	bwn_core_exit(struct bwn_mac *);
static void	bwn_bt_disable(struct bwn_mac *);
static int	bwn_chip_init(struct bwn_mac *);
static void	bwn_set_txretry(struct bwn_mac *, int, int);
static void	bwn_rate_init(struct bwn_mac *);
static void	bwn_set_phytxctl(struct bwn_mac *);
static void	bwn_spu_setdelay(struct bwn_mac *, int);
static void	bwn_bt_enable(struct bwn_mac *);
static void	bwn_set_macaddr(struct bwn_mac *);
static void	bwn_crypt_init(struct bwn_mac *);
static void	bwn_chip_exit(struct bwn_mac *);
static int	bwn_fw_fillinfo(struct bwn_mac *);
static int	bwn_fw_loaducode(struct bwn_mac *);
static int	bwn_gpio_init(struct bwn_mac *);
static int	bwn_fw_loadinitvals(struct bwn_mac *);
static int	bwn_phy_init(struct bwn_mac *);
static void	bwn_set_txantenna(struct bwn_mac *, int);
static void	bwn_set_opmode(struct bwn_mac *);
static void	bwn_rate_write(struct bwn_mac *, uint16_t, int);
static uint8_t	bwn_plcp_getcck(const uint8_t);
static uint8_t	bwn_plcp_getofdm(const uint8_t);
static void	bwn_pio_init(struct bwn_mac *);
static uint16_t	bwn_pio_idx2base(struct bwn_mac *, int);
static void	bwn_pio_set_txqueue(struct bwn_mac *, struct bwn_pio_txqueue *,
		    int);
static void	bwn_pio_setupqueue_rx(struct bwn_mac *,
		    struct bwn_pio_rxqueue *, int);
static void	bwn_destroy_queue_tx(struct bwn_pio_txqueue *);
static uint16_t	bwn_pio_read_2(struct bwn_mac *, struct bwn_pio_txqueue *,
		    uint16_t);
static void	bwn_pio_cancel_tx_packets(struct bwn_pio_txqueue *);
static int	bwn_pio_rx(struct bwn_pio_rxqueue *);
static uint8_t	bwn_pio_rxeof(struct bwn_pio_rxqueue *);
static void	bwn_pio_handle_txeof(struct bwn_mac *,
		    const struct bwn_txstatus *);
static uint16_t	bwn_pio_rx_read_2(struct bwn_pio_rxqueue *, uint16_t);
static uint32_t	bwn_pio_rx_read_4(struct bwn_pio_rxqueue *, uint16_t);
static void	bwn_pio_rx_write_2(struct bwn_pio_rxqueue *, uint16_t,
		    uint16_t);
static void	bwn_pio_rx_write_4(struct bwn_pio_rxqueue *, uint16_t,
		    uint32_t);
static int	bwn_pio_tx_start(struct bwn_mac *, struct ieee80211_node *,
		    struct mbuf *);
static struct bwn_pio_txqueue *bwn_pio_select(struct bwn_mac *, uint8_t);
static uint32_t	bwn_pio_write_multi_4(struct bwn_mac *,
		    struct bwn_pio_txqueue *, uint32_t, const void *, int);
static void	bwn_pio_write_4(struct bwn_mac *, struct bwn_pio_txqueue *,
		    uint16_t, uint32_t);
static uint16_t	bwn_pio_write_multi_2(struct bwn_mac *,
		    struct bwn_pio_txqueue *, uint16_t, const void *, int);
static uint16_t	bwn_pio_write_mbuf_2(struct bwn_mac *,
		    struct bwn_pio_txqueue *, uint16_t, struct mbuf *);
static struct bwn_pio_txqueue *bwn_pio_parse_cookie(struct bwn_mac *,
		    uint16_t, struct bwn_pio_txpkt **);
static void	bwn_dma_init(struct bwn_mac *);
static void	bwn_dma_rxdirectfifo(struct bwn_mac *, int, uint8_t);
static int	bwn_dma_mask2type(uint64_t);
static uint64_t	bwn_dma_mask(struct bwn_mac *);
static uint16_t	bwn_dma_base(int, int);
static void	bwn_dma_ringfree(struct bwn_dma_ring **);
static void	bwn_dma_32_getdesc(struct bwn_dma_ring *,
		    int, struct bwn_dmadesc_generic **,
		    struct bwn_dmadesc_meta **);
static void	bwn_dma_32_setdesc(struct bwn_dma_ring *,
		    struct bwn_dmadesc_generic *, bus_addr_t, uint16_t, int,
		    int, int);
static void	bwn_dma_32_start_transfer(struct bwn_dma_ring *, int);
static void	bwn_dma_32_suspend(struct bwn_dma_ring *);
static void	bwn_dma_32_resume(struct bwn_dma_ring *);
static int	bwn_dma_32_get_curslot(struct bwn_dma_ring *);
static void	bwn_dma_32_set_curslot(struct bwn_dma_ring *, int);
static void	bwn_dma_64_getdesc(struct bwn_dma_ring *,
		    int, struct bwn_dmadesc_generic **,
		    struct bwn_dmadesc_meta **);
static void	bwn_dma_64_setdesc(struct bwn_dma_ring *,
		    struct bwn_dmadesc_generic *, bus_addr_t, uint16_t, int,
		    int, int);
static void	bwn_dma_64_start_transfer(struct bwn_dma_ring *, int);
static void	bwn_dma_64_suspend(struct bwn_dma_ring *);
static void	bwn_dma_64_resume(struct bwn_dma_ring *);
static int	bwn_dma_64_get_curslot(struct bwn_dma_ring *);
static void	bwn_dma_64_set_curslot(struct bwn_dma_ring *, int);
static int	bwn_dma_allocringmemory(struct bwn_dma_ring *);
static void	bwn_dma_setup(struct bwn_dma_ring *);
static void	bwn_dma_free_ringmemory(struct bwn_dma_ring *);
static void	bwn_dma_cleanup(struct bwn_dma_ring *);
static void	bwn_dma_free_descbufs(struct bwn_dma_ring *);
static int	bwn_dma_tx_reset(struct bwn_mac *, uint16_t, int);
static void	bwn_dma_rx(struct bwn_dma_ring *);
static int	bwn_dma_rx_reset(struct bwn_mac *, uint16_t, int);
static void	bwn_dma_free_descbuf(struct bwn_dma_ring *,
		    struct bwn_dmadesc_meta *);
static void	bwn_dma_set_redzone(struct bwn_dma_ring *, struct mbuf *);
static int	bwn_dma_gettype(struct bwn_mac *);
static void	bwn_dma_ring_addr(void *, bus_dma_segment_t *, int, int);
static int	bwn_dma_freeslot(struct bwn_dma_ring *);
static int	bwn_dma_nextslot(struct bwn_dma_ring *, int);
static void	bwn_dma_rxeof(struct bwn_dma_ring *, int *);
static int	bwn_dma_newbuf(struct bwn_dma_ring *,
		    struct bwn_dmadesc_generic *, struct bwn_dmadesc_meta *,
		    int);
static void	bwn_dma_buf_addr(void *, bus_dma_segment_t *, int,
		    bus_size_t, int);
static uint8_t	bwn_dma_check_redzone(struct bwn_dma_ring *, struct mbuf *);
static void	bwn_dma_handle_txeof(struct bwn_mac *,
		    const struct bwn_txstatus *);
static int	bwn_dma_tx_start(struct bwn_mac *, struct ieee80211_node *,
		    struct mbuf *);
static int	bwn_dma_getslot(struct bwn_dma_ring *);
static struct bwn_dma_ring *bwn_dma_select(struct bwn_mac *,
		    uint8_t);
static int	bwn_dma_attach(struct bwn_mac *);
static struct bwn_dma_ring *bwn_dma_ringsetup(struct bwn_mac *,
		    int, int, int);
static struct bwn_dma_ring *bwn_dma_parse_cookie(struct bwn_mac *,
		    const struct bwn_txstatus *, uint16_t, int *);
static void	bwn_dma_free(struct bwn_mac *);
static int	bwn_fw_gets(struct bwn_mac *, enum bwn_fwtype);
static int	bwn_fw_get(struct bwn_mac *, enum bwn_fwtype,
		    const char *, struct bwn_fwfile *);
static void	bwn_release_firmware(struct bwn_mac *);
static void	bwn_do_release_fw(struct bwn_fwfile *);
static uint16_t	bwn_fwcaps_read(struct bwn_mac *);
static int	bwn_fwinitvals_write(struct bwn_mac *,
		    const struct bwn_fwinitvals *, size_t, size_t);
static uint16_t	bwn_ant2phy(int);
static void	bwn_mac_write_bssid(struct bwn_mac *);
static void	bwn_mac_setfilter(struct bwn_mac *, uint16_t,
		    const uint8_t *);
static void	bwn_key_dowrite(struct bwn_mac *, uint8_t, uint8_t,
		    const uint8_t *, size_t, const uint8_t *);
static void	bwn_key_macwrite(struct bwn_mac *, uint8_t,
		    const uint8_t *);
static void	bwn_key_write(struct bwn_mac *, uint8_t, uint8_t,
		    const uint8_t *);
static void	bwn_phy_exit(struct bwn_mac *);
static void	bwn_core_stop(struct bwn_mac *);
static int	bwn_switch_band(struct bwn_softc *,
		    struct ieee80211_channel *);
static void	bwn_phy_reset(struct bwn_mac *);
static int	bwn_newstate(struct ieee80211vap *, enum ieee80211_state, int);
static void	bwn_set_pretbtt(struct bwn_mac *);
static int	bwn_intr(void *);
static void	bwn_intrtask(void *, int);
static void	bwn_restart(struct bwn_mac *, const char *);
static void	bwn_intr_ucode_debug(struct bwn_mac *);
static void	bwn_intr_tbtt_indication(struct bwn_mac *);
static void	bwn_intr_atim_end(struct bwn_mac *);
static void	bwn_intr_beacon(struct bwn_mac *);
static void	bwn_intr_pmq(struct bwn_mac *);
static void	bwn_intr_noise(struct bwn_mac *);
static void	bwn_intr_txeof(struct bwn_mac *);
static void	bwn_hwreset(void *, int);
static void	bwn_handle_fwpanic(struct bwn_mac *);
static void	bwn_load_beacon0(struct bwn_mac *);
static void	bwn_load_beacon1(struct bwn_mac *);
static uint32_t	bwn_jssi_read(struct bwn_mac *);
static void	bwn_noise_gensample(struct bwn_mac *);
static void	bwn_handle_txeof(struct bwn_mac *,
		    const struct bwn_txstatus *);
static void	bwn_rxeof(struct bwn_mac *, struct mbuf *, const void *);
static void	bwn_phy_txpower_check(struct bwn_mac *, uint32_t);
static int	bwn_tx_start(struct bwn_softc *, struct ieee80211_node *,
		    struct mbuf *);
static int	bwn_tx_isfull(struct bwn_softc *, struct mbuf *);
static int	bwn_set_txhdr(struct bwn_mac *,
		    struct ieee80211_node *, struct mbuf *, struct bwn_txhdr *,
		    uint16_t);
static void	bwn_plcp_genhdr(struct bwn_plcp4 *, const uint16_t,
		    const uint8_t);
static uint8_t	bwn_antenna_sanitize(struct bwn_mac *, uint8_t);
static uint8_t	bwn_get_fbrate(uint8_t);
static void	bwn_txpwr(void *, int);
static void	bwn_tasks(void *);
static void	bwn_task_15s(struct bwn_mac *);
static void	bwn_task_30s(struct bwn_mac *);
static void	bwn_task_60s(struct bwn_mac *);
static int	bwn_plcp_get_ofdmrate(struct bwn_mac *, struct bwn_plcp6 *,
		    uint8_t);
static int	bwn_plcp_get_cckrate(struct bwn_mac *, struct bwn_plcp6 *);
static void	bwn_rx_radiotap(struct bwn_mac *, struct mbuf *,
		    const struct bwn_rxhdr4 *, struct bwn_plcp6 *, int,
		    int, int);
static void	bwn_tsf_read(struct bwn_mac *, uint64_t *);
static void	bwn_set_slot_time(struct bwn_mac *, uint16_t);
static void	bwn_watchdog(void *);
static void	bwn_dma_stop(struct bwn_mac *);
static void	bwn_pio_stop(struct bwn_mac *);
static void	bwn_dma_ringstop(struct bwn_dma_ring **);
static void	bwn_led_attach(struct bwn_mac *);
static void	bwn_led_newstate(struct bwn_mac *, enum ieee80211_state);
static void	bwn_led_event(struct bwn_mac *, int);
static void	bwn_led_blink_start(struct bwn_mac *, int, int);
static void	bwn_led_blink_next(void *);
static void	bwn_led_blink_end(void *);
static void	bwn_rfswitch(void *);
static void	bwn_rf_turnon(struct bwn_mac *);
static void	bwn_rf_turnoff(struct bwn_mac *);
static void	bwn_sysctl_node(struct bwn_softc *);

static struct resource_spec bwn_res_spec_legacy[] = {
	{ SYS_RES_IRQ,		0,		RF_ACTIVE | RF_SHAREABLE },
	{ -1,			0,		0 }
};

static struct resource_spec bwn_res_spec_msi[] = {
	{ SYS_RES_IRQ,		1,		RF_ACTIVE },
	{ -1,			0,		0 }
};

static const struct bwn_channelinfo bwn_chantable_bg = {
	.channels = {
		{ 2412,  1, 30 }, { 2417,  2, 30 }, { 2422,  3, 30 },
		{ 2427,  4, 30 }, { 2432,  5, 30 }, { 2437,  6, 30 },
		{ 2442,  7, 30 }, { 2447,  8, 30 }, { 2452,  9, 30 },
		{ 2457, 10, 30 }, { 2462, 11, 30 }, { 2467, 12, 30 },
		{ 2472, 13, 30 }, { 2484, 14, 30 } },
	.nchannels = 14
};

static const struct bwn_channelinfo bwn_chantable_a = {
	.channels = {
		{ 5170,  34, 30 }, { 5180,  36, 30 }, { 5190,  38, 30 },
		{ 5200,  40, 30 }, { 5210,  42, 30 }, { 5220,  44, 30 },
		{ 5230,  46, 30 }, { 5240,  48, 30 }, { 5260,  52, 30 },
		{ 5280,  56, 30 }, { 5300,  60, 30 }, { 5320,  64, 30 },
		{ 5500, 100, 30 }, { 5520, 104, 30 }, { 5540, 108, 30 },
		{ 5560, 112, 30 }, { 5580, 116, 30 }, { 5600, 120, 30 },
		{ 5620, 124, 30 }, { 5640, 128, 30 }, { 5660, 132, 30 },
		{ 5680, 136, 30 }, { 5700, 140, 30 }, { 5745, 149, 30 },
		{ 5765, 153, 30 }, { 5785, 157, 30 }, { 5805, 161, 30 },
		{ 5825, 165, 30 }, { 5920, 184, 30 }, { 5940, 188, 30 },
		{ 5960, 192, 30 }, { 5980, 196, 30 }, { 6000, 200, 30 },
		{ 6020, 204, 30 }, { 6040, 208, 30 }, { 6060, 212, 30 },
		{ 6080, 216, 30 } },
	.nchannels = 37
};

#if 0
static const struct bwn_channelinfo bwn_chantable_n = {
	.channels = {
		{ 5160,  32, 30 }, { 5170,  34, 30 }, { 5180,  36, 30 },
		{ 5190,  38, 30 }, { 5200,  40, 30 }, { 5210,  42, 30 },
		{ 5220,  44, 30 }, { 5230,  46, 30 }, { 5240,  48, 30 },
		{ 5250,  50, 30 }, { 5260,  52, 30 }, { 5270,  54, 30 },
		{ 5280,  56, 30 }, { 5290,  58, 30 }, { 5300,  60, 30 },
		{ 5310,  62, 30 }, { 5320,  64, 30 }, { 5330,  66, 30 },
		{ 5340,  68, 30 }, { 5350,  70, 30 }, { 5360,  72, 30 },
		{ 5370,  74, 30 }, { 5380,  76, 30 }, { 5390,  78, 30 },
		{ 5400,  80, 30 }, { 5410,  82, 30 }, { 5420,  84, 30 },
		{ 5430,  86, 30 }, { 5440,  88, 30 }, { 5450,  90, 30 },
		{ 5460,  92, 30 }, { 5470,  94, 30 }, { 5480,  96, 30 },
		{ 5490,  98, 30 }, { 5500, 100, 30 }, { 5510, 102, 30 },
		{ 5520, 104, 30 }, { 5530, 106, 30 }, { 5540, 108, 30 },
		{ 5550, 110, 30 }, { 5560, 112, 30 }, { 5570, 114, 30 },
		{ 5580, 116, 30 }, { 5590, 118, 30 }, { 5600, 120, 30 },
		{ 5610, 122, 30 }, { 5620, 124, 30 }, { 5630, 126, 30 },
		{ 5640, 128, 30 }, { 5650, 130, 30 }, { 5660, 132, 30 },
		{ 5670, 134, 30 }, { 5680, 136, 30 }, { 5690, 138, 30 },
		{ 5700, 140, 30 }, { 5710, 142, 30 }, { 5720, 144, 30 },
		{ 5725, 145, 30 }, { 5730, 146, 30 }, { 5735, 147, 30 },
		{ 5740, 148, 30 }, { 5745, 149, 30 }, { 5750, 150, 30 },
		{ 5755, 151, 30 }, { 5760, 152, 30 }, { 5765, 153, 30 },
		{ 5770, 154, 30 }, { 5775, 155, 30 }, { 5780, 156, 30 },
		{ 5785, 157, 30 }, { 5790, 158, 30 }, { 5795, 159, 30 },
		{ 5800, 160, 30 }, { 5805, 161, 30 }, { 5810, 162, 30 },
		{ 5815, 163, 30 }, { 5820, 164, 30 }, { 5825, 165, 30 },
		{ 5830, 166, 30 }, { 5840, 168, 30 }, { 5850, 170, 30 },
		{ 5860, 172, 30 }, { 5870, 174, 30 }, { 5880, 176, 30 },
		{ 5890, 178, 30 }, { 5900, 180, 30 }, { 5910, 182, 30 },
		{ 5920, 184, 30 }, { 5930, 186, 30 }, { 5940, 188, 30 },
		{ 5950, 190, 30 }, { 5960, 192, 30 }, { 5970, 194, 30 },
		{ 5980, 196, 30 }, { 5990, 198, 30 }, { 6000, 200, 30 },
		{ 6010, 202, 30 }, { 6020, 204, 30 }, { 6030, 206, 30 },
		{ 6040, 208, 30 }, { 6050, 210, 30 }, { 6060, 212, 30 },
		{ 6070, 214, 30 }, { 6080, 216, 30 }, { 6090, 218, 30 },
		{ 6100, 220, 30 }, { 6110, 222, 30 }, { 6120, 224, 30 },
		{ 6130, 226, 30 }, { 6140, 228, 30 } },
	.nchannels = 110
};
#endif

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

static const struct {
	uint16_t	vid;
	uint8_t		led_act[BWN_LED_MAX];
} bwn_vendor_led_act[] = {
	VENDOR_LED_ACT(COMPAQ),
	VENDOR_LED_ACT(ASUSTEK)
};

static const uint8_t bwn_default_led_act[BWN_LED_MAX] =
	{ BWN_VENDOR_LED_ACT_DEFAULT };

#undef VENDOR_LED_ACT

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

static const uint16_t bwn_wme_shm_offsets[] = {
	[0] = BWN_WME_BESTEFFORT,
	[1] = BWN_WME_BACKGROUND,
	[2] = BWN_WME_VOICE,
	[3] = BWN_WME_VIDEO,
};

static const struct siba_devid bwn_devs[] = {
	SIBA_DEV(BROADCOM, 80211, 5, "Revision 5"),
	SIBA_DEV(BROADCOM, 80211, 6, "Revision 6"),
	SIBA_DEV(BROADCOM, 80211, 7, "Revision 7"),
	SIBA_DEV(BROADCOM, 80211, 9, "Revision 9"),
	SIBA_DEV(BROADCOM, 80211, 10, "Revision 10"),
	SIBA_DEV(BROADCOM, 80211, 11, "Revision 11"),
	SIBA_DEV(BROADCOM, 80211, 12, "Revision 12"),
	SIBA_DEV(BROADCOM, 80211, 13, "Revision 13"),
	SIBA_DEV(BROADCOM, 80211, 15, "Revision 15"),
	SIBA_DEV(BROADCOM, 80211, 16, "Revision 16")
};

static int
bwn_probe(device_t dev)
{
	int i;

	for (i = 0; i < nitems(bwn_devs); i++) {
		if (siba_get_vendor(dev) == bwn_devs[i].sd_vendor &&
		    siba_get_device(dev) == bwn_devs[i].sd_device &&
		    siba_get_revid(dev) == bwn_devs[i].sd_rev)
			return (BUS_PROBE_DEFAULT);
	}

	return (ENXIO);
}

static int
bwn_attach(device_t dev)
{
	struct bwn_mac *mac;
	struct bwn_softc *sc = device_get_softc(dev);
	int error, i, msic, reg;

	sc->sc_dev = dev;
#ifdef BWN_DEBUG
	sc->sc_debug = bwn_debug;
#endif

	if ((sc->sc_flags & BWN_FLAG_ATTACHED) == 0) {
		bwn_attach_pre(sc);
		bwn_sprom_bugfixes(dev);
		sc->sc_flags |= BWN_FLAG_ATTACHED;
	}

	if (!TAILQ_EMPTY(&sc->sc_maclist)) {
		if (siba_get_pci_device(dev) != 0x4313 &&
		    siba_get_pci_device(dev) != 0x431a &&
		    siba_get_pci_device(dev) != 0x4321) {
			device_printf(sc->sc_dev,
			    "skip 802.11 cores\n");
			return (ENODEV);
		}
	}

	mac = malloc(sizeof(*mac), M_DEVBUF, M_WAITOK | M_ZERO);
	mac->mac_sc = sc;
	mac->mac_status = BWN_MAC_STATUS_UNINIT;
	if (bwn_bfp != 0)
		mac->mac_flags |= BWN_MAC_FLAG_BADFRAME_PREEMP;

	TASK_INIT(&mac->mac_hwreset, 0, bwn_hwreset, mac);
	TASK_INIT(&mac->mac_intrtask, 0, bwn_intrtask, mac);
	TASK_INIT(&mac->mac_txpower, 0, bwn_txpwr, mac);

	error = bwn_attach_core(mac);
	if (error)
		goto fail0;
	bwn_led_attach(mac);

	device_printf(sc->sc_dev, "WLAN (chipid %#x rev %u) "
	    "PHY (analog %d type %d rev %d) RADIO (manuf %#x ver %#x rev %d)\n",
	    siba_get_chipid(sc->sc_dev), siba_get_revid(sc->sc_dev),
	    mac->mac_phy.analog, mac->mac_phy.type, mac->mac_phy.rev,
	    mac->mac_phy.rf_manuf, mac->mac_phy.rf_ver,
	    mac->mac_phy.rf_rev);
	if (mac->mac_flags & BWN_MAC_FLAG_DMA)
		device_printf(sc->sc_dev, "DMA (%d bits)\n",
		    mac->mac_method.dma.dmatype);
	else
		device_printf(sc->sc_dev, "PIO\n");

	/*
	 * setup PCI resources and interrupt.
	 */
	if (pci_find_cap(dev, PCIY_EXPRESS, &reg) == 0) {
		msic = pci_msi_count(dev);
		if (bootverbose)
			device_printf(sc->sc_dev, "MSI count : %d\n", msic);
	} else
		msic = 0;

	mac->mac_intr_spec = bwn_res_spec_legacy;
	if (msic == BWN_MSI_MESSAGES && bwn_msi_disable == 0) {
		if (pci_alloc_msi(dev, &msic) == 0) {
			device_printf(sc->sc_dev,
			    "Using %d MSI messages\n", msic);
			mac->mac_intr_spec = bwn_res_spec_msi;
			mac->mac_msi = 1;
		}
	}

	error = bus_alloc_resources(dev, mac->mac_intr_spec,
	    mac->mac_res_irq);
	if (error) {
		device_printf(sc->sc_dev,
		    "couldn't allocate IRQ resources (%d)\n", error);
		goto fail1;
	}

	if (mac->mac_msi == 0)
		error = bus_setup_intr(dev, mac->mac_res_irq[0],
		    INTR_TYPE_NET | INTR_MPSAFE, bwn_intr, NULL, mac,
		    &mac->mac_intrhand[0]);
	else {
		for (i = 0; i < BWN_MSI_MESSAGES; i++) {
			error = bus_setup_intr(dev, mac->mac_res_irq[i],
			    INTR_TYPE_NET | INTR_MPSAFE, bwn_intr, NULL, mac,
			    &mac->mac_intrhand[i]);
			if (error != 0) {
				device_printf(sc->sc_dev,
				    "couldn't setup interrupt (%d)\n", error);
				break;
			}
		}
	}

	TAILQ_INSERT_TAIL(&sc->sc_maclist, mac, mac_list);

	/*
	 * calls attach-post routine
	 */
	if ((sc->sc_flags & BWN_FLAG_ATTACHED) != 0)
		bwn_attach_post(sc);

	return (0);
fail1:
	if (msic == BWN_MSI_MESSAGES && bwn_msi_disable == 0)
		pci_release_msi(dev);
fail0:
	free(mac, M_DEVBUF);
	return (error);
}

static int
bwn_is_valid_ether_addr(uint8_t *addr)
{
	char zero_addr[6] = { 0, 0, 0, 0, 0, 0 };

	if ((addr[0] & 1) || (!bcmp(addr, zero_addr, ETHER_ADDR_LEN)))
		return (FALSE);

	return (TRUE);
}

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

	ic->ic_softc = sc;
	ic->ic_name = device_get_nameunit(sc->sc_dev);
	/* XXX not right but it's not used anywhere important */
	ic->ic_phytype = IEEE80211_T_OFDM;
	ic->ic_opmode = IEEE80211_M_STA;
	ic->ic_caps =
		  IEEE80211_C_STA		/* station mode supported */
		| IEEE80211_C_MONITOR		/* monitor mode */
		| IEEE80211_C_AHDEMO		/* adhoc demo mode */
		| IEEE80211_C_SHPREAMBLE	/* short preamble supported */
		| IEEE80211_C_SHSLOT		/* short slot time supported */
		| IEEE80211_C_WME		/* WME/WMM supported */
		| IEEE80211_C_WPA		/* capable of WPA1+WPA2 */
#if 0
		| IEEE80211_C_BGSCAN		/* capable of bg scanning */
#endif
		| IEEE80211_C_TXPMGT		/* capable of txpow mgt */
		;

	ic->ic_flags_ext |= IEEE80211_FEXT_SWBMISS;	/* s/w bmiss */

	IEEE80211_ADDR_COPY(ic->ic_macaddr,
	    bwn_is_valid_ether_addr(siba_sprom_get_mac_80211a(sc->sc_dev)) ?
	    siba_sprom_get_mac_80211a(sc->sc_dev) :
	    siba_sprom_get_mac_80211bg(sc->sc_dev));

	/* call MI attach routine. */
	ieee80211_ifattach(ic);

	ic->ic_headroom = sizeof(struct bwn_txhdr);

	/* override default methods */
	ic->ic_raw_xmit = bwn_raw_xmit;
	ic->ic_updateslot = bwn_updateslot;
	ic->ic_update_promisc = bwn_update_promisc;
	ic->ic_wme.wme_update = bwn_wme_update;
	ic->ic_scan_start = bwn_scan_start;
	ic->ic_scan_end = bwn_scan_end;
	ic->ic_set_channel = bwn_set_channel;
	ic->ic_vap_create = bwn_vap_create;
	ic->ic_vap_delete = bwn_vap_delete;
	ic->ic_transmit = bwn_transmit;
	ic->ic_parent = bwn_parent;

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

	bwn_sysctl_node(sc);

	if (bootverbose)
		ieee80211_announce(ic);
	return (0);
}

static void
bwn_phy_detach(struct bwn_mac *mac)
{

	if (mac->mac_phy.detach != NULL)
		mac->mac_phy.detach(mac);
}

static int
bwn_detach(device_t dev)
{
	struct bwn_softc *sc = device_get_softc(dev);
	struct bwn_mac *mac = sc->sc_curmac;
	struct ieee80211com *ic = &sc->sc_ic;
	int i;

	sc->sc_flags |= BWN_FLAG_INVALID;

	if (device_is_attached(sc->sc_dev)) {
		BWN_LOCK(sc);
		bwn_stop(sc);
		BWN_UNLOCK(sc);
		bwn_dma_free(mac);
		callout_drain(&sc->sc_led_blink_ch);
		callout_drain(&sc->sc_rfswitch_ch);
		callout_drain(&sc->sc_task_ch);
		callout_drain(&sc->sc_watchdog_ch);
		bwn_phy_detach(mac);
		ieee80211_draintask(ic, &mac->mac_hwreset);
		ieee80211_draintask(ic, &mac->mac_txpower);
		ieee80211_ifdetach(ic);
	}
	taskqueue_drain(sc->sc_tq, &mac->mac_intrtask);
	taskqueue_free(sc->sc_tq);

	for (i = 0; i < BWN_MSI_MESSAGES; i++) {
		if (mac->mac_intrhand[i] != NULL) {
			bus_teardown_intr(dev, mac->mac_res_irq[i],
			    mac->mac_intrhand[i]);
			mac->mac_intrhand[i] = NULL;
		}
	}
	bus_release_resources(dev, mac->mac_intr_spec, mac->mac_res_irq);
	if (mac->mac_msi != 0)
		pci_release_msi(dev);
	mbufq_drain(&sc->sc_snd);
	BWN_LOCK_DESTROY(sc);
	return (0);
}

static void
bwn_attach_pre(struct bwn_softc *sc)
{

	BWN_LOCK_INIT(sc);
	TAILQ_INIT(&sc->sc_maclist);
	callout_init_mtx(&sc->sc_rfswitch_ch, &sc->sc_mtx, 0);
	callout_init_mtx(&sc->sc_task_ch, &sc->sc_mtx, 0);
	callout_init_mtx(&sc->sc_watchdog_ch, &sc->sc_mtx, 0);
	mbufq_init(&sc->sc_snd, ifqmaxlen);
	sc->sc_tq = taskqueue_create_fast("bwn_taskq", M_NOWAIT,
		taskqueue_thread_enqueue, &sc->sc_tq);
	taskqueue_start_threads(&sc->sc_tq, 1, PI_NET,
		"%s taskq", device_get_nameunit(sc->sc_dev));
}

static void
bwn_sprom_bugfixes(device_t dev)
{
#define	BWN_ISDEV(_vendor, _device, _subvendor, _subdevice)		\
	((siba_get_pci_vendor(dev) == PCI_VENDOR_##_vendor) &&		\
	 (siba_get_pci_device(dev) == _device) &&			\
	 (siba_get_pci_subvendor(dev) == PCI_VENDOR_##_subvendor) &&	\
	 (siba_get_pci_subdevice(dev) == _subdevice))

	if (siba_get_pci_subvendor(dev) == PCI_VENDOR_APPLE &&
	    siba_get_pci_subdevice(dev) == 0x4e &&
	    siba_get_pci_revid(dev) > 0x40)
		siba_sprom_set_bf_lo(dev,
		    siba_sprom_get_bf_lo(dev) | BWN_BFL_PACTRL);
	if (siba_get_pci_subvendor(dev) == SIBA_BOARDVENDOR_DELL &&
	    siba_get_chipid(dev) == 0x4301 && siba_get_pci_revid(dev) == 0x74)
		siba_sprom_set_bf_lo(dev,
		    siba_sprom_get_bf_lo(dev) | BWN_BFL_BTCOEXIST);
	if (siba_get_type(dev) == SIBA_TYPE_PCI) {
		if (BWN_ISDEV(BROADCOM, 0x4318, ASUSTEK, 0x100f) ||
		    BWN_ISDEV(BROADCOM, 0x4320, DELL, 0x0003) ||
		    BWN_ISDEV(BROADCOM, 0x4320, HP, 0x12f8) ||
		    BWN_ISDEV(BROADCOM, 0x4320, LINKSYS, 0x0013) ||
		    BWN_ISDEV(BROADCOM, 0x4320, LINKSYS, 0x0014) ||
		    BWN_ISDEV(BROADCOM, 0x4320, LINKSYS, 0x0015) ||
		    BWN_ISDEV(BROADCOM, 0x4320, MOTOROLA, 0x7010))
			siba_sprom_set_bf_lo(dev,
			    siba_sprom_get_bf_lo(dev) & ~BWN_BFL_BTCOEXIST);
	}
#undef	BWN_ISDEV
}

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

	BWN_LOCK(sc);
	if (ic->ic_nrunning > 0) {
		if ((sc->sc_flags & BWN_FLAG_RUNNING) == 0) {
			bwn_init(sc);
			startall = 1;
		} else
			bwn_update_promisc(ic);
	} else if (sc->sc_flags & BWN_FLAG_RUNNING)
		bwn_stop(sc);
	BWN_UNLOCK(sc);

	if (startall)
		ieee80211_start_all(ic);
}

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

	BWN_LOCK(sc);
	if ((sc->sc_flags & BWN_FLAG_RUNNING) == 0) {
		BWN_UNLOCK(sc);
		return (ENXIO);
	}
	error = mbufq_enqueue(&sc->sc_snd, m);
	if (error) {
		BWN_UNLOCK(sc);
		return (error);
	}
	bwn_start(sc);
	BWN_UNLOCK(sc);
	return (0);
}

static void
bwn_start(struct bwn_softc *sc)
{
	struct bwn_mac *mac = sc->sc_curmac;
	struct ieee80211_frame *wh;
	struct ieee80211_node *ni;
	struct ieee80211_key *k;
	struct mbuf *m;

	BWN_ASSERT_LOCKED(sc);

	if ((sc->sc_flags & BWN_FLAG_RUNNING) == 0 || mac == NULL ||
	    mac->mac_status < BWN_MAC_STATUS_STARTED)
		return;

	while ((m = mbufq_dequeue(&sc->sc_snd)) != NULL) {
		if (bwn_tx_isfull(sc, m))
			break;
		ni = (struct ieee80211_node *) m->m_pkthdr.rcvif;
		if (ni == NULL) {
			device_printf(sc->sc_dev, "unexpected NULL ni\n");
			m_freem(m);
			counter_u64_add(sc->sc_ic.ic_oerrors, 1);
			continue;
		}
		wh = mtod(m, struct ieee80211_frame *);
		if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) {
			k = ieee80211_crypto_encap(ni, m);
			if (k == NULL) {
				if_inc_counter(ni->ni_vap->iv_ifp,
				    IFCOUNTER_OERRORS, 1);
				ieee80211_free_node(ni);
				m_freem(m);
				continue;
			}
		}
		wh = NULL;	/* Catch any invalid use */
		if (bwn_tx_start(sc, ni, m) != 0) {
			if (ni != NULL) {
				if_inc_counter(ni->ni_vap->iv_ifp,
				    IFCOUNTER_OERRORS, 1);
				ieee80211_free_node(ni);
			}
			continue;
		}
		sc->sc_watchdog_timer = 5;
	}
}

static int
bwn_tx_isfull(struct bwn_softc *sc, struct mbuf *m)
{
	struct bwn_dma_ring *dr;
	struct bwn_mac *mac = sc->sc_curmac;
	struct bwn_pio_txqueue *tq;
	int pktlen = roundup(m->m_pkthdr.len + BWN_HDRSIZE(mac), 4);

	BWN_ASSERT_LOCKED(sc);

	if (mac->mac_flags & BWN_MAC_FLAG_DMA) {
		dr = bwn_dma_select(mac, M_WME_GETAC(m));
		if (dr->dr_stop == 1 ||
		    bwn_dma_freeslot(dr) < BWN_TX_SLOTS_PER_FRAME) {
			dr->dr_stop = 1;
			goto full;
		}
	} else {
		tq = bwn_pio_select(mac, M_WME_GETAC(m));
		if (tq->tq_free == 0 || pktlen > tq->tq_size ||
		    pktlen > (tq->tq_size - tq->tq_used))
			goto full;
	}
	return (0);
full:
	mbufq_prepend(&sc->sc_snd, m);
	return (1);
}

static int
bwn_tx_start(struct bwn_softc *sc, struct ieee80211_node *ni, struct mbuf *m)
{
	struct bwn_mac *mac = sc->sc_curmac;
	int error;

	BWN_ASSERT_LOCKED(sc);

	if (m->m_pkthdr.len < IEEE80211_MIN_LEN || mac == NULL) {
		m_freem(m);
		return (ENXIO);
	}

	error = (mac->mac_flags & BWN_MAC_FLAG_DMA) ?
	    bwn_dma_tx_start(mac, ni, m) : bwn_pio_tx_start(mac, ni, m);
	if (error) {
		m_freem(m);
		return (error);
	}
	return (0);
}

static int
bwn_pio_tx_start(struct bwn_mac *mac, struct ieee80211_node *ni, struct mbuf *m)
{
	struct bwn_pio_txpkt *tp;
	struct bwn_pio_txqueue *tq = bwn_pio_select(mac, M_WME_GETAC(m));
	struct bwn_softc *sc = mac->mac_sc;
	struct bwn_txhdr txhdr;
	struct mbuf *m_new;
	uint32_t ctl32;
	int error;
	uint16_t ctl16;

	BWN_ASSERT_LOCKED(sc);

	/* XXX TODO send packets after DTIM */

	KASSERT(!TAILQ_EMPTY(&tq->tq_pktlist), ("%s: fail", __func__));
	tp = TAILQ_FIRST(&tq->tq_pktlist);
	tp->tp_ni = ni;
	tp->tp_m = m;

	error = bwn_set_txhdr(mac, ni, m, &txhdr, BWN_PIO_COOKIE(tq, tp));
	if (error) {
		device_printf(sc->sc_dev, "tx fail\n");
		return (error);
	}

	TAILQ_REMOVE(&tq->tq_pktlist, tp, tp_list);
	tq->tq_used += roundup(m->m_pkthdr.len + BWN_HDRSIZE(mac), 4);
	tq->tq_free--;

	if (siba_get_revid(sc->sc_dev) >= 8) {
		/*
		 * XXX please removes m_defrag(9)
		 */
		m_new = m_defrag(m, M_NOWAIT);
		if (m_new == NULL) {
			device_printf(sc->sc_dev,
			    "%s: can't defrag TX buffer\n",
			    __func__);
			return (ENOBUFS);
		}
		if (m_new->m_next != NULL)
			device_printf(sc->sc_dev,
			    "TODO: fragmented packets for PIO\n");
		tp->tp_m = m_new;

		/* send HEADER */
		ctl32 = bwn_pio_write_multi_4(mac, tq,
		    (BWN_PIO_READ_4(mac, tq, BWN_PIO8_TXCTL) |
			BWN_PIO8_TXCTL_FRAMEREADY) & ~BWN_PIO8_TXCTL_EOF,
		    (const uint8_t *)&txhdr, BWN_HDRSIZE(mac));
		/* send BODY */
		ctl32 = bwn_pio_write_multi_4(mac, tq, ctl32,
		    mtod(m_new, const void *), m_new->m_pkthdr.len);
		bwn_pio_write_4(mac, tq, BWN_PIO_TXCTL,
		    ctl32 | BWN_PIO8_TXCTL_EOF);
	} else {
		ctl16 = bwn_pio_write_multi_2(mac, tq,
		    (bwn_pio_read_2(mac, tq, BWN_PIO_TXCTL) |
			BWN_PIO_TXCTL_FRAMEREADY) & ~BWN_PIO_TXCTL_EOF,
		    (const uint8_t *)&txhdr, BWN_HDRSIZE(mac));
		ctl16 = bwn_pio_write_mbuf_2(mac, tq, ctl16, m);
		BWN_PIO_WRITE_2(mac, tq, BWN_PIO_TXCTL,
		    ctl16 | BWN_PIO_TXCTL_EOF);
	}

	return (0);
}

static struct bwn_pio_txqueue *
bwn_pio_select(struct bwn_mac *mac, uint8_t prio)
{

	if ((mac->mac_flags & BWN_MAC_FLAG_WME) == 0)
		return (&mac->mac_method.pio.wme[WME_AC_BE]);

	switch (prio) {
	case 0:
		return (&mac->mac_method.pio.wme[WME_AC_BE]);
	case 1:
		return (&mac->mac_method.pio.wme[WME_AC_BK]);
	case 2:
		return (&mac->mac_method.pio.wme[WME_AC_VI]);
	case 3:
		return (&mac->mac_method.pio.wme[WME_AC_VO]);
	}
	KASSERT(0 == 1, ("%s:%d: fail", __func__, __LINE__));
	return (NULL);
}

static int
bwn_dma_tx_start(struct bwn_mac *mac, struct ieee80211_node *ni, struct mbuf *m)
{
#define	BWN_GET_TXHDRCACHE(slot)					\
	&(txhdr_cache[(slot / BWN_TX_SLOTS_PER_FRAME) * BWN_HDRSIZE(mac)])
	struct bwn_dma *dma = &mac->mac_method.dma;
	struct bwn_dma_ring *dr = bwn_dma_select(mac, M_WME_GETAC(m));
	struct bwn_dmadesc_generic *desc;
	struct bwn_dmadesc_meta *mt;
	struct bwn_softc *sc = mac->mac_sc;
	uint8_t *txhdr_cache = (uint8_t *)dr->dr_txhdr_cache;
	int error, slot, backup[2] = { dr->dr_curslot, dr->dr_usedslot };

	BWN_ASSERT_LOCKED(sc);
	KASSERT(!dr->dr_stop, ("%s:%d: fail", __func__, __LINE__));

	/* XXX send after DTIM */

	slot = bwn_dma_getslot(dr);
	dr->getdesc(dr, slot, &desc, &mt);
	KASSERT(mt->mt_txtype == BWN_DMADESC_METATYPE_HEADER,
	    ("%s:%d: fail", __func__, __LINE__));

	error = bwn_set_txhdr(dr->dr_mac, ni, m,
	    (struct bwn_txhdr *)BWN_GET_TXHDRCACHE(slot),
	    BWN_DMA_COOKIE(dr, slot));
	if (error)
		goto fail;
	error = bus_dmamap_load(dr->dr_txring_dtag, mt->mt_dmap,
	    BWN_GET_TXHDRCACHE(slot), BWN_HDRSIZE(mac), bwn_dma_ring_addr,
	    &mt->mt_paddr, BUS_DMA_NOWAIT);
	if (error) {
		device_printf(sc->sc_dev, "%s: can't load TX buffer (1) %d\n",
		    __func__, error);
		goto fail;
	}
	bus_dmamap_sync(dr->dr_txring_dtag, mt->mt_dmap,
	    BUS_DMASYNC_PREWRITE);
	dr->setdesc(dr, desc, mt->mt_paddr, BWN_HDRSIZE(mac), 1, 0, 0);
	bus_dmamap_sync(dr->dr_ring_dtag, dr->dr_ring_dmap,
	    BUS_DMASYNC_PREWRITE);

	slot = bwn_dma_getslot(dr);
	dr->getdesc(dr, slot, &desc, &mt);
	KASSERT(mt->mt_txtype == BWN_DMADESC_METATYPE_BODY &&
	    mt->mt_islast == 1, ("%s:%d: fail", __func__, __LINE__));
	mt->mt_m = m;
	mt->mt_ni = ni;

	error = bus_dmamap_load_mbuf(dma->txbuf_dtag, mt->mt_dmap, m,
	    bwn_dma_buf_addr, &mt->mt_paddr, BUS_DMA_NOWAIT);
	if (error && error != EFBIG) {
		device_printf(sc->sc_dev, "%s: can't load TX buffer (1) %d\n",
		    __func__, error);
		goto fail;
	}
	if (error) {    /* error == EFBIG */
		struct mbuf *m_new;

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

		mt->mt_m = m;
		error = bus_dmamap_load_mbuf(dma->txbuf_dtag, mt->mt_dmap,
		    m, bwn_dma_buf_addr, &mt->mt_paddr, BUS_DMA_NOWAIT);
		if (error) {
			device_printf(sc->sc_dev,
			    "%s: can't load TX buffer (2) %d\n",
			    __func__, error);
			goto fail;
		}
	}
	bus_dmamap_sync(dma->txbuf_dtag, mt->mt_dmap, BUS_DMASYNC_PREWRITE);
	dr->setdesc(dr, desc, mt->mt_paddr, m->m_pkthdr.len, 0, 1, 1);
	bus_dmamap_sync(dr->dr_ring_dtag, dr->dr_ring_dmap,
	    BUS_DMASYNC_PREWRITE);

	/* XXX send after DTIM */

	dr->start_transfer(dr, bwn_dma_nextslot(dr, slot));
	return (0);
fail:
	dr->dr_curslot = backup[0];
	dr->dr_usedslot = backup[1];
	return (error);
#undef BWN_GET_TXHDRCACHE
}

static void
bwn_watchdog(void *arg)
{
	struct bwn_softc *sc = arg;

	if (sc->sc_watchdog_timer != 0 && --sc->sc_watchdog_timer == 0) {
		device_printf(sc->sc_dev, "device timeout\n");
		counter_u64_add(sc->sc_ic.ic_oerrors, 1);
	}
	callout_schedule(&sc->sc_watchdog_ch, hz);
}

static int
bwn_attach_core(struct bwn_mac *mac)
{
	struct bwn_softc *sc = mac->mac_sc;
	int error, have_bg = 0, have_a = 0;
	uint32_t high;

	KASSERT(siba_get_revid(sc->sc_dev) >= 5,
	    ("unsupported revision %d", siba_get_revid(sc->sc_dev)));

	siba_powerup(sc->sc_dev, 0);

	high = siba_read_4(sc->sc_dev, SIBA_TGSHIGH);

	/*
	 * Guess at whether it has A-PHY or G-PHY.
	 * This is just used for resetting the core to probe things;
	 * we will re-guess once it's all up and working.
	 *
	 * XXX TODO: there's the TGSHIGH DUALPHY flag based on
	 * the PHY revision.
	 */
	bwn_reset_core(mac, !!(high & BWN_TGSHIGH_HAVE_2GHZ));

	/*
	 * Get the PHY version.
	 */
	error = bwn_phy_getinfo(mac, high);
	if (error)
		goto fail;

	/* XXX TODO need bhnd */
	if (bwn_is_bus_siba(mac)) {
		have_a = (high & BWN_TGSHIGH_HAVE_5GHZ) ? 1 : 0;
		have_bg = (high & BWN_TGSHIGH_HAVE_2GHZ) ? 1 : 0;
		if (high & BWN_TGSHIGH_DUALPHY) {
			have_bg = 1;
			have_a = 1;
		}
	} else {
		device_printf(sc->sc_dev, "%s: not siba; bailing\n", __func__);
		error = ENXIO;
		goto fail;
	}

#if 0
	device_printf(sc->sc_dev, "%s: high=0x%08x, have_a=%d, have_bg=%d,"
	    " deviceid=0x%04x, siba_deviceid=0x%04x\n",
	    __func__,
	    high,
	    have_a,
	    have_bg,
	    siba_get_pci_device(sc->sc_dev),
	    siba_get_chipid(sc->sc_dev));
#endif

	if (siba_get_pci_device(sc->sc_dev) != 0x4312 &&
	    siba_get_pci_device(sc->sc_dev) != 0x4319 &&
	    siba_get_pci_device(sc->sc_dev) != 0x4324 &&
	    siba_get_pci_device(sc->sc_dev) != 0x4328) {
		have_a = have_bg = 0;
		if (mac->mac_phy.type == BWN_PHYTYPE_A)
			have_a = 1;
		else if (mac->mac_phy.type == BWN_PHYTYPE_G ||
		    mac->mac_phy.type == BWN_PHYTYPE_N ||
		    mac->mac_phy.type == BWN_PHYTYPE_LP)
			have_bg = 1;
		else
			KASSERT(0 == 1, ("%s: unknown phy type (%d)", __func__,
			    mac->mac_phy.type));
	}

	/*
	 * XXX turns off PHY A because it's not supported.
	 * Implement PHY-A support so we can use it for PHY-G
	 * dual-band support.
	 */
	if (mac->mac_phy.type != BWN_PHYTYPE_LP &&
	    mac->mac_phy.type != BWN_PHYTYPE_N) {
		device_printf(sc->sc_dev,
		    "%s: forcing 2GHz only; missing PHY-A support\n",
		    __func__);
		have_a = 0;
		have_bg = 1;
	}

	if (mac->mac_phy.type == BWN_PHYTYPE_G) {
		mac->mac_phy.attach = bwn_phy_g_attach;
		mac->mac_phy.detach = bwn_phy_g_detach;
		mac->mac_phy.prepare_hw = bwn_phy_g_prepare_hw;
		mac->mac_phy.init_pre = bwn_phy_g_init_pre;
		mac->mac_phy.init = bwn_phy_g_init;
		mac->mac_phy.exit = bwn_phy_g_exit;
		mac->mac_phy.phy_read = bwn_phy_g_read;
		mac->mac_phy.phy_write = bwn_phy_g_write;
		mac->mac_phy.rf_read = bwn_phy_g_rf_read;
		mac->mac_phy.rf_write = bwn_phy_g_rf_write;
		mac->mac_phy.use_hwpctl = bwn_phy_g_hwpctl;
		mac->mac_phy.rf_onoff = bwn_phy_g_rf_onoff;
		mac->mac_phy.switch_analog = bwn_phy_switch_analog;
		mac->mac_phy.switch_channel = bwn_phy_g_switch_channel;
		mac->mac_phy.get_default_chan = bwn_phy_g_get_default_chan;
		mac->mac_phy.set_antenna = bwn_phy_g_set_antenna;
		mac->mac_phy.set_im = bwn_phy_g_im;
		mac->mac_phy.recalc_txpwr = bwn_phy_g_recalc_txpwr;
		mac->mac_phy.set_txpwr = bwn_phy_g_set_txpwr;
		mac->mac_phy.task_15s = bwn_phy_g_task_15s;
		mac->mac_phy.task_60s = bwn_phy_g_task_60s;
	} else if (mac->mac_phy.type == BWN_PHYTYPE_LP) {
		mac->mac_phy.init_pre = bwn_phy_lp_init_pre;
		mac->mac_phy.init = bwn_phy_lp_init;
		mac->mac_phy.phy_read = bwn_phy_lp_read;
		mac->mac_phy.phy_write = bwn_phy_lp_write;
		mac->mac_phy.phy_maskset = bwn_phy_lp_maskset;
		mac->mac_phy.rf_read = bwn_phy_lp_rf_read;
		mac->mac_phy.rf_write = bwn_phy_lp_rf_write;
		mac->mac_phy.rf_onoff = bwn_phy_lp_rf_onoff;
		mac->mac_phy.switch_analog = bwn_phy_lp_switch_analog;
		mac->mac_phy.switch_channel = bwn_phy_lp_switch_channel;
		mac->mac_phy.get_default_chan = bwn_phy_lp_get_default_chan;
		mac->mac_phy.set_antenna = bwn_phy_lp_set_antenna;
		mac->mac_phy.task_60s = bwn_phy_lp_task_60s;
	} else {
		device_printf(sc->sc_dev, "unsupported PHY type (%d)\n",
		    mac->mac_phy.type);
		error = ENXIO;
		goto fail;
	}

	mac->mac_phy.gmode = have_bg;
	if (mac->mac_phy.attach != NULL) {
		error = mac->mac_phy.attach(mac);
		if (error) {
			device_printf(sc->sc_dev, "failed\n");
			goto fail;
		}
	}

	bwn_reset_core(mac, have_bg);

	error = bwn_chiptest(mac);
	if (error)
		goto fail;
	error = bwn_setup_channels(mac, have_bg, have_a);
	if (error) {
		device_printf(sc->sc_dev, "failed to setup channels\n");
		goto fail;
	}

	if (sc->sc_curmac == NULL)
		sc->sc_curmac = mac;

	error = bwn_dma_attach(mac);
	if (error != 0) {
		device_printf(sc->sc_dev, "failed to initialize DMA\n");
		goto fail;
	}

	mac->mac_phy.switch_analog(mac, 0);

	siba_dev_down(sc->sc_dev, 0);
fail:
	siba_powerdown(sc->sc_dev);
	return (error);
}

/*
 * Reset - SIBA.
 *
 * XXX TODO: implement BCMA version!
 */
void
bwn_reset_core(struct bwn_mac *mac, int g_mode)
{
	struct bwn_softc *sc = mac->mac_sc;
	uint32_t low, ctl;
	uint32_t flags = 0;

	DPRINTF(sc, BWN_DEBUG_RESET, "%s: g_mode=%d\n", __func__, g_mode);

	flags |= (BWN_TGSLOW_PHYCLOCK_ENABLE | BWN_TGSLOW_PHYRESET);
	if (g_mode)
		flags |= BWN_TGSLOW_SUPPORT_G;

	/* XXX N-PHY only; and hard-code to 20MHz for now */
	if (mac->mac_phy.type == BWN_PHYTYPE_N)
		flags |= BWN_TGSLOW_PHY_BANDWIDTH_20MHZ;

	siba_dev_up(sc->sc_dev, flags);
	DELAY(2000);

	/* Take PHY out of reset */
	low = (siba_read_4(sc->sc_dev, SIBA_TGSLOW) | SIBA_TGSLOW_FGC) &
	    ~BWN_TGSLOW_PHYRESET;
	siba_write_4(sc->sc_dev, SIBA_TGSLOW, low);
	siba_read_4(sc->sc_dev, SIBA_TGSLOW);
	DELAY(1000);
	siba_write_4(sc->sc_dev, SIBA_TGSLOW, low & ~SIBA_TGSLOW_FGC);
	siba_read_4(sc->sc_dev, SIBA_TGSLOW);
	DELAY(1000);

	if (mac->mac_phy.switch_analog != NULL)
		mac->mac_phy.switch_analog(mac, 1);

	ctl = BWN_READ_4(mac, BWN_MACCTL) & ~BWN_MACCTL_GMODE;
	if (g_mode)
		ctl |= BWN_MACCTL_GMODE;
	BWN_WRITE_4(mac, BWN_MACCTL, ctl | BWN_MACCTL_IHR_ON);
}

static int
bwn_phy_getinfo(struct bwn_mac *mac, int tgshigh)
{
	struct bwn_phy *phy = &mac->mac_phy;
	struct bwn_softc *sc = mac->mac_sc;
	uint32_t tmp;

	/* PHY */
	tmp = BWN_READ_2(mac, BWN_PHYVER);
	phy->gmode = !! (tgshigh & BWN_TGSHIGH_HAVE_2GHZ);
	phy->rf_on = 1;
	phy->analog = (tmp & BWN_PHYVER_ANALOG) >> 12;
	phy->type = (tmp & BWN_PHYVER_TYPE) >> 8;
	phy->rev = (tmp & BWN_PHYVER_VERSION);
	if ((phy->type == BWN_PHYTYPE_A && phy->rev >= 4) ||
	    (phy->type == BWN_PHYTYPE_B && phy->rev != 2 &&
		phy->rev != 4 && phy->rev != 6 && phy->rev != 7) ||
	    (phy->type == BWN_PHYTYPE_G && phy->rev > 9) ||
	    (phy->type == BWN_PHYTYPE_N && phy->rev > 4) ||
	    (phy->type == BWN_PHYTYPE_LP && phy->rev > 2))
		goto unsupphy;

	/* RADIO */
	if (siba_get_chipid(sc->sc_dev) == 0x4317) {
		if (siba_get_chiprev(sc->sc_dev) == 0)
			tmp = 0x3205017f;
		else if (siba_get_chiprev(sc->sc_dev) == 1)
			tmp = 0x4205017f;
		else
			tmp = 0x5205017f;
	} else {
		BWN_WRITE_2(mac, BWN_RFCTL, BWN_RFCTL_ID);
		tmp = BWN_READ_2(mac, BWN_RFDATALO);
		BWN_WRITE_2(mac, BWN_RFCTL, BWN_RFCTL_ID);
		tmp |= (uint32_t)BWN_READ_2(mac, BWN_RFDATAHI) << 16;
	}
	phy->rf_rev = (tmp & 0xf0000000) >> 28;
	phy->rf_ver = (tmp & 0x0ffff000) >> 12;
	phy->rf_manuf = (tmp & 0x00000fff);

	/*
	 * For now, just always do full init (ie, what bwn has traditionally
	 * done)
	 */
	phy->phy_do_full_init = 1;

	if (phy->rf_manuf != 0x17f)	/* 0x17f is broadcom */
		goto unsupradio;
	if ((phy->type == BWN_PHYTYPE_A && (phy->rf_ver != 0x2060 ||
	     phy->rf_rev != 1 || phy->rf_manuf != 0x17f)) ||
	    (phy->type == BWN_PHYTYPE_B && (phy->rf_ver & 0xfff0) != 0x2050) ||
	    (phy->type == BWN_PHYTYPE_G && phy->rf_ver != 0x2050) ||
	    (phy->type == BWN_PHYTYPE_N &&
	     phy->rf_ver != 0x2055 && phy->rf_ver != 0x2056) ||
	    (phy->type == BWN_PHYTYPE_LP &&
	     phy->rf_ver != 0x2062 && phy->rf_ver != 0x2063))
		goto unsupradio;

	return (0);
unsupphy:
	device_printf(sc->sc_dev, "unsupported PHY (type %#x, rev %#x, "
	    "analog %#x)\n",
	    phy->type, phy->rev, phy->analog);
	return (ENXIO);
unsupradio:
	device_printf(sc->sc_dev, "unsupported radio (manuf %#x, ver %#x, "
	    "rev %#x)\n",
	    phy->rf_manuf, phy->rf_ver, phy->rf_rev);
	return (ENXIO);
}

static int
bwn_chiptest(struct bwn_mac *mac)
{
#define	TESTVAL0	0x55aaaa55
#define	TESTVAL1	0xaa5555aa
	struct bwn_softc *sc = mac->mac_sc;
	uint32_t v, backup;

	BWN_LOCK(sc);

	backup = bwn_shm_read_4(mac, BWN_SHARED, 0);

	bwn_shm_write_4(mac, BWN_SHARED, 0, TESTVAL0);
	if (bwn_shm_read_4(mac, BWN_SHARED, 0) != TESTVAL0)
		goto error;
	bwn_shm_write_4(mac, BWN_SHARED, 0, TESTVAL1);
	if (bwn_shm_read_4(mac, BWN_SHARED, 0) != TESTVAL1)
		goto error;

	bwn_shm_write_4(mac, BWN_SHARED, 0, backup);

	if ((siba_get_revid(sc->sc_dev) >= 3) &&
	    (siba_get_revid(sc->sc_dev) <= 10)) {
		BWN_WRITE_2(mac, BWN_TSF_CFP_START, 0xaaaa);
		BWN_WRITE_4(mac, BWN_TSF_CFP_START, 0xccccbbbb);
		if (BWN_READ_2(mac, BWN_TSF_CFP_START_LOW) != 0xbbbb)
			goto error;
		if (BWN_READ_2(mac, BWN_TSF_CFP_START_HIGH) != 0xcccc)
			goto error;
	}
	BWN_WRITE_4(mac, BWN_TSF_CFP_START, 0);

	v = BWN_READ_4(mac, BWN_MACCTL) | BWN_MACCTL_GMODE;
	if (v != (BWN_MACCTL_GMODE | BWN_MACCTL_IHR_ON))
		goto error;

	BWN_UNLOCK(sc);
	return (0);
error:
	BWN_UNLOCK(sc);
	device_printf(sc->sc_dev, "failed to validate the chipaccess\n");
	return (ENODEV);
}

static int
bwn_setup_channels(struct bwn_mac *mac, int have_bg, int have_a)
{
	struct bwn_softc *sc = mac->mac_sc;
	struct ieee80211com *ic = &sc->sc_ic;
	uint8_t bands[howmany(IEEE80211_MODE_MAX, 8)];

	memset(ic->ic_channels, 0, sizeof(ic->ic_channels));
	ic->ic_nchans = 0;

	DPRINTF(sc, BWN_DEBUG_EEPROM, "%s: called; bg=%d, a=%d\n",
	    __func__,
	    have_bg,
	    have_a);

	if (have_bg) {
		memset(bands, 0, sizeof(bands));
		setbit(bands, IEEE80211_MODE_11B);
		setbit(bands, IEEE80211_MODE_11G);
		bwn_addchannels(ic->ic_channels, IEEE80211_CHAN_MAX,
		    &ic->ic_nchans, &bwn_chantable_bg, bands);
	}

	if (have_a) {
		memset(bands, 0, sizeof(bands));
		setbit(bands, IEEE80211_MODE_11A);
		bwn_addchannels(ic->ic_channels, IEEE80211_CHAN_MAX,
		    &ic->ic_nchans, &bwn_chantable_a, bands);
	}

	mac->mac_phy.supports_2ghz = have_bg;
	mac->mac_phy.supports_5ghz = have_a;

	return (ic->ic_nchans == 0 ? ENXIO : 0);
}

uint32_t
bwn_shm_read_4(struct bwn_mac *mac, uint16_t way, uint16_t offset)
{
	uint32_t ret;

	BWN_ASSERT_LOCKED(mac->mac_sc);

	if (way == BWN_SHARED) {
		KASSERT((offset & 0x0001) == 0,
		    ("%s:%d warn", __func__, __LINE__));
		if (offset & 0x0003) {
			bwn_shm_ctlword(mac, way, offset >> 2);
			ret = BWN_READ_2(mac, BWN_SHM_DATA_UNALIGNED);
			ret <<= 16;
			bwn_shm_ctlword(mac, way, (offset >> 2) + 1);
			ret |= BWN_READ_2(mac, BWN_SHM_DATA);
			goto out;
		}
		offset >>= 2;
	}
	bwn_shm_ctlword(mac, way, offset);
	ret = BWN_READ_4(mac, BWN_SHM_DATA);
out:
	return (ret);
}

uint16_t
bwn_shm_read_2(struct bwn_mac *mac, uint16_t way, uint16_t offset)
{
	uint16_t ret;

	BWN_ASSERT_LOCKED(mac->mac_sc);

	if (way == BWN_SHARED) {
		KASSERT((offset & 0x0001) == 0,
		    ("%s:%d warn", __func__, __LINE__));
		if (offset & 0x0003) {
			bwn_shm_ctlword(mac, way, offset >> 2);
			ret = BWN_READ_2(mac, BWN_SHM_DATA_UNALIGNED);
			goto out;
		}
		offset >>= 2;
	}
	bwn_shm_ctlword(mac, way, offset);
	ret = BWN_READ_2(mac, BWN_SHM_DATA);
out:

	return (ret);
}

static void
bwn_shm_ctlword(struct bwn_mac *mac, uint16_t way,
    uint16_t offset)
{
	uint32_t control;

	control = way;
	control <<= 16;
	control |= offset;
	BWN_WRITE_4(mac, BWN_SHM_CONTROL, control);
}

void
bwn_shm_write_4(struct bwn_mac *mac, uint16_t way, uint16_t offset,
    uint32_t value)
{
	BWN_ASSERT_LOCKED(mac->mac_sc);

	if (way == BWN_SHARED) {
		KASSERT((offset & 0x0001) == 0,
		    ("%s:%d warn", __func__, __LINE__));
		if (offset & 0x0003) {
			bwn_shm_ctlword(mac, way, offset >> 2);
			BWN_WRITE_2(mac, BWN_SHM_DATA_UNALIGNED,
				    (value >> 16) & 0xffff);
			bwn_shm_ctlword(mac, way, (offset >> 2) + 1);
			BWN_WRITE_2(mac, BWN_SHM_DATA, value & 0xffff);
			return;
		}
		offset >>= 2;
	}
	bwn_shm_ctlword(mac, way, offset);
	BWN_WRITE_4(mac, BWN_SHM_DATA, value);
}

void
bwn_shm_write_2(struct bwn_mac *mac, uint16_t way, uint16_t offset,
    uint16_t value)
{
	BWN_ASSERT_LOCKED(mac->mac_sc);

	if (way == BWN_SHARED) {
		KASSERT((offset & 0x0001) == 0,
		    ("%s:%d warn", __func__, __LINE__));
		if (offset & 0x0003) {
			bwn_shm_ctlword(mac, way, offset >> 2);
			BWN_WRITE_2(mac, BWN_SHM_DATA_UNALIGNED, value);
			return;
		}
		offset >>= 2;
	}
	bwn_shm_ctlword(mac, way, offset);
	BWN_WRITE_2(mac, BWN_SHM_DATA, value);
}

static void
bwn_addchannels(struct ieee80211_channel chans[], int maxchans, int *nchans,
    const struct bwn_channelinfo *ci, const uint8_t bands[])
{
	int i, error;

	for (i = 0, error = 0; i < ci->nchannels && error == 0; i++) {
		const struct bwn_channel *hc = &ci->channels[i];

		error = ieee80211_add_channel(chans, maxchans, nchans,
		    hc->ieee, hc->freq, hc->maxTxPow, 0, bands);
	}
}

static int
bwn_raw_xmit(struct ieee80211_node *ni, struct mbuf *m,
	const struct ieee80211_bpf_params *params)
{
	struct ieee80211com *ic = ni->ni_ic;
	struct bwn_softc *sc = ic->ic_softc;
	struct bwn_mac *mac = sc->sc_curmac;
	int error;

	if ((sc->sc_flags & BWN_FLAG_RUNNING) == 0 ||
	    mac->mac_status < BWN_MAC_STATUS_STARTED) {
		m_freem(m);
		return (ENETDOWN);
	}

	BWN_LOCK(sc);
	if (bwn_tx_isfull(sc, m)) {
		m_freem(m);
		BWN_UNLOCK(sc);
		return (ENOBUFS);
	}

	error = bwn_tx_start(sc, ni, m);
	if (error == 0)
		sc->sc_watchdog_timer = 5;
	BWN_UNLOCK(sc);
	return (error);
}

/*
 * Callback from the 802.11 layer to update the slot time
 * based on the current setting.  We use it to notify the
 * firmware of ERP changes and the f/w takes care of things
 * like slot time and preamble.
 */
static void
bwn_updateslot(struct ieee80211com *ic)
{
	struct bwn_softc *sc = ic->ic_softc;
	struct bwn_mac *mac;

	BWN_LOCK(sc);
	if (sc->sc_flags & BWN_FLAG_RUNNING) {
		mac = (struct bwn_mac *)sc->sc_curmac;
		bwn_set_slot_time(mac, IEEE80211_GET_SLOTTIME(ic));
	}
	BWN_UNLOCK(sc);
}

/*
 * Callback from the 802.11 layer after a promiscuous mode change.
 * Note this interface does not check the operating mode as this
 * is an internal callback and we are expected to honor the current
 * state (e.g. this is used for setting the interface in promiscuous
 * mode when operating in hostap mode to do ACS).
 */
static void
bwn_update_promisc(struct ieee80211com *ic)
{
	struct bwn_softc *sc = ic->ic_softc;
	struct bwn_mac *mac = sc->sc_curmac;

	BWN_LOCK(sc);
	mac = sc->sc_curmac;
	if (mac != NULL && mac->mac_status >= BWN_MAC_STATUS_INITED) {
		if (ic->ic_promisc > 0)
			sc->sc_filters |= BWN_MACCTL_PROMISC;
		else
			sc->sc_filters &= ~BWN_MACCTL_PROMISC;
		bwn_set_opmode(mac);
	}
	BWN_UNLOCK(sc);
}

/*
 * Callback from the 802.11 layer to update WME parameters.
 */
static int
bwn_wme_update(struct ieee80211com *ic)
{
	struct bwn_softc *sc = ic->ic_softc;
	struct bwn_mac *mac = sc->sc_curmac;
	struct wmeParams *wmep;
	int i;

	BWN_LOCK(sc);
	mac = sc->sc_curmac;
	if (mac != NULL && mac->mac_status >= BWN_MAC_STATUS_INITED) {
		bwn_mac_suspend(mac);
		for (i = 0; i < N(sc->sc_wmeParams); i++) {
			wmep = &ic->ic_wme.wme_chanParams.cap_wmeParams[i];
			bwn_wme_loadparams(mac, wmep, bwn_wme_shm_offsets[i]);
		}
		bwn_mac_enable(mac);
	}
	BWN_UNLOCK(sc);
	return (0);
}

static void
bwn_scan_start(struct ieee80211com *ic)
{
	struct bwn_softc *sc = ic->ic_softc;
	struct bwn_mac *mac;

	BWN_LOCK(sc);
	mac = sc->sc_curmac;
	if (mac != NULL && mac->mac_status >= BWN_MAC_STATUS_INITED) {
		sc->sc_filters |= BWN_MACCTL_BEACON_PROMISC;
		bwn_set_opmode(mac);
		/* disable CFP update during scan */
		bwn_hf_write(mac, bwn_hf_read(mac) | BWN_HF_SKIP_CFP_UPDATE);
	}
	BWN_UNLOCK(sc);
}

static void
bwn_scan_end(struct ieee80211com *ic)
{
	struct bwn_softc *sc = ic->ic_softc;
	struct bwn_mac *mac;

	BWN_LOCK(sc);
	mac = sc->sc_curmac;
	if (mac != NULL && mac->mac_status >= BWN_MAC_STATUS_INITED) {
		sc->sc_filters &= ~BWN_MACCTL_BEACON_PROMISC;
		bwn_set_opmode(mac);
		bwn_hf_write(mac, bwn_hf_read(mac) & ~BWN_HF_SKIP_CFP_UPDATE);
	}
	BWN_UNLOCK(sc);
}

static void
bwn_set_channel(struct ieee80211com *ic)
{
	struct bwn_softc *sc = ic->ic_softc;
	struct bwn_mac *mac = sc->sc_curmac;
	struct bwn_phy *phy = &mac->mac_phy;
	int chan, error;

	BWN_LOCK(sc);

	error = bwn_switch_band(sc, ic->ic_curchan);
	if (error)
		goto fail;
	bwn_mac_suspend(mac);
	bwn_set_txretry(mac, BWN_RETRY_SHORT, BWN_RETRY_LONG);
	chan = ieee80211_chan2ieee(ic, ic->ic_curchan);
	if (chan != phy->chan)
		bwn_switch_channel(mac, chan);

	/* TX power level */
	if (ic->ic_curchan->ic_maxpower != 0 &&
	    ic->ic_curchan->ic_maxpower != phy->txpower) {
		phy->txpower = ic->ic_curchan->ic_maxpower / 2;
		bwn_phy_txpower_check(mac, BWN_TXPWR_IGNORE_TIME |
		    BWN_TXPWR_IGNORE_TSSI);
	}

	bwn_set_txantenna(mac, BWN_ANT_DEFAULT);
	if (phy->set_antenna)
		phy->set_antenna(mac, BWN_ANT_DEFAULT);

	if (sc->sc_rf_enabled != phy->rf_on) {
		if (sc->sc_rf_enabled) {
			bwn_rf_turnon(mac);
			if (!(mac->mac_flags & BWN_MAC_FLAG_RADIO_ON))
				device_printf(sc->sc_dev,
				    "please turn on the RF switch\n");
		} else
			bwn_rf_turnoff(mac);
	}

	bwn_mac_enable(mac);

fail:
	/*
	 * Setup radio tap channel freq and flags
	 */
	sc->sc_tx_th.wt_chan_freq = sc->sc_rx_th.wr_chan_freq =
		htole16(ic->ic_curchan->ic_freq);
	sc->sc_tx_th.wt_chan_flags = sc->sc_rx_th.wr_chan_flags =
		htole16(ic->ic_curchan->ic_flags & 0xffff);

	BWN_UNLOCK(sc);
}

static struct ieee80211vap *
bwn_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 ieee80211vap *vap;
	struct bwn_vap *bvp;

	switch (opmode) {
	case IEEE80211_M_HOSTAP:
	case IEEE80211_M_MBSS:
	case IEEE80211_M_STA:
	case IEEE80211_M_WDS:
	case IEEE80211_M_MONITOR:
	case IEEE80211_M_IBSS:
	case IEEE80211_M_AHDEMO:
		break;
	default:
		return (NULL);
	}

	bvp = malloc(sizeof(struct bwn_vap), M_80211_VAP, M_WAITOK | M_ZERO);
	vap = &bvp->bv_vap;
	ieee80211_vap_setup(ic, vap, name, unit, opmode, flags, bssid);
	/* override with driver methods */
	bvp->bv_newstate = vap->iv_newstate;
	vap->iv_newstate = bwn_newstate;

	/* override max aid so sta's cannot assoc when we're out of sta id's */
	vap->iv_max_aid = BWN_STAID_MAX;

	ieee80211_ratectl_init(vap);

	/* complete setup */
	ieee80211_vap_attach(vap, ieee80211_media_change,
	    ieee80211_media_status, mac);
	return (vap);
}

static void
bwn_vap_delete(struct ieee80211vap *vap)
{
	struct bwn_vap *bvp = BWN_VAP(vap);

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

static int
bwn_init(struct bwn_softc *sc)
{
	struct bwn_mac *mac;
	int error;

	BWN_ASSERT_LOCKED(sc);

	DPRINTF(sc, BWN_DEBUG_RESET, "%s: called\n", __func__);

	bzero(sc->sc_bssid, IEEE80211_ADDR_LEN);
	sc->sc_flags |= BWN_FLAG_NEED_BEACON_TP;
	sc->sc_filters = 0;
	bwn_wme_clear(sc);
	sc->sc_beacons[0] = sc->sc_beacons[1] = 0;
	sc->sc_rf_enabled = 1;

	mac = sc->sc_curmac;
	if (mac->mac_status == BWN_MAC_STATUS_UNINIT) {
		error = bwn_core_init(mac);
		if (error != 0)
			return (error);
	}
	if (mac->mac_status == BWN_MAC_STATUS_INITED)
		bwn_core_start(mac);

	bwn_set_opmode(mac);
	bwn_set_pretbtt(mac);
	bwn_spu_setdelay(mac, 0);
	bwn_set_macaddr(mac);

	sc->sc_flags |= BWN_FLAG_RUNNING;
	callout_reset(&sc->sc_rfswitch_ch, hz, bwn_rfswitch, sc);
	callout_reset(&sc->sc_watchdog_ch, hz, bwn_watchdog, sc);

	return (0);
}

static void
bwn_stop(struct bwn_softc *sc)
{
	struct bwn_mac *mac = sc->sc_curmac;

	BWN_ASSERT_LOCKED(sc);

	DPRINTF(sc, BWN_DEBUG_RESET, "%s: called\n", __func__);

	if (mac->mac_status >= BWN_MAC_STATUS_INITED) {
		/* XXX FIXME opmode not based on VAP */
		bwn_set_opmode(mac);
		bwn_set_macaddr(mac);
	}

	if (mac->mac_status >= BWN_MAC_STATUS_STARTED)
		bwn_core_stop(mac);

	callout_stop(&sc->sc_led_blink_ch);
	sc->sc_led_blinking = 0;

	bwn_core_exit(mac);
	sc->sc_rf_enabled = 0;

	sc->sc_flags &= ~BWN_FLAG_RUNNING;
}

static void
bwn_wme_clear(struct bwn_softc *sc)
{
#define	MS(_v, _f)	(((_v) & _f) >> _f##_S)
	struct wmeParams *p;
	unsigned int i;

	KASSERT(N(bwn_wme_shm_offsets) == N(sc->sc_wmeParams),
	    ("%s:%d: fail", __func__, __LINE__));

	for (i = 0; i < N(sc->sc_wmeParams); i++) {
		p = &(sc->sc_wmeParams[i]);

		switch (bwn_wme_shm_offsets[i]) {
		case BWN_WME_VOICE:
			p->wmep_txopLimit = 0;
			p->wmep_aifsn = 2;
			/* XXX FIXME: log2(cwmin) */
			p->wmep_logcwmin = MS(0x0001, WME_PARAM_LOGCWMIN);
			p->wmep_logcwmax = MS(0x0001, WME_PARAM_LOGCWMAX);
			break;
		case BWN_WME_VIDEO:
			p->wmep_txopLimit = 0;
			p->wmep_aifsn = 2;
			/* XXX FIXME: log2(cwmin) */
			p->wmep_logcwmin = MS(0x0001, WME_PARAM_LOGCWMIN);
			p->wmep_logcwmax = MS(0x0001, WME_PARAM_LOGCWMAX);
			break;
		case BWN_WME_BESTEFFORT:
			p->wmep_txopLimit = 0;
			p->wmep_aifsn = 3;
			/* XXX FIXME: log2(cwmin) */
			p->wmep_logcwmin = MS(0x0001, WME_PARAM_LOGCWMIN);
			p->wmep_logcwmax = MS(0x03ff, WME_PARAM_LOGCWMAX);
			break;
		case BWN_WME_BACKGROUND:
			p->wmep_txopLimit = 0;
			p->wmep_aifsn = 7;
			/* XXX FIXME: log2(cwmin) */
			p->wmep_logcwmin = MS(0x0001, WME_PARAM_LOGCWMIN);
			p->wmep_logcwmax = MS(0x03ff, WME_PARAM_LOGCWMAX);
			break;
		default:
			KASSERT(0 == 1, ("%s:%d: fail", __func__, __LINE__));
		}
	}
}

static int
bwn_core_init(struct bwn_mac *mac)
{
	struct bwn_softc *sc = mac->mac_sc;
	uint64_t hf;
	int error;

	KASSERT(mac->mac_status == BWN_MAC_STATUS_UNINIT,
	    ("%s:%d: fail", __func__, __LINE__));

	siba_powerup(sc->sc_dev, 0);
	if (!siba_dev_isup(sc->sc_dev))
		bwn_reset_core(mac, mac->mac_phy.gmode);

	mac->mac_flags &= ~BWN_MAC_FLAG_DFQVALID;
	mac->mac_flags |= BWN_MAC_FLAG_RADIO_ON;
	mac->mac_phy.hwpctl = (bwn_hwpctl) ? 1 : 0;
	BWN_GETTIME(mac->mac_phy.nexttime);
	mac->mac_phy.txerrors = BWN_TXERROR_MAX;
	bzero(&mac->mac_stats, sizeof(mac->mac_stats));
	mac->mac_stats.link_noise = -95;
	mac->mac_reason_intr = 0;
	bzero(mac->mac_reason, sizeof(mac->mac_reason));
	mac->mac_intr_mask = BWN_INTR_MASKTEMPLATE;
#ifdef BWN_DEBUG
	if (sc->sc_debug & BWN_DEBUG_XMIT)
		mac->mac_intr_mask &= ~BWN_INTR_PHY_TXERR;
#endif
	mac->mac_suspended = 1;
	mac->mac_task_state = 0;
	memset(&mac->mac_noise, 0, sizeof(mac->mac_noise));

	mac->mac_phy.init_pre(mac);

	siba_pcicore_intr(sc->sc_dev);

	siba_fix_imcfglobug(sc->sc_dev);
	bwn_bt_disable(mac);
	if (mac->mac_phy.prepare_hw) {
		error = mac->mac_phy.prepare_hw(mac);
		if (error)
			goto fail0;
	}
	error = bwn_chip_init(mac);
	if (error)
		goto fail0;
	bwn_shm_write_2(mac, BWN_SHARED, BWN_SHARED_COREREV,
	    siba_get_revid(sc->sc_dev));
	hf = bwn_hf_read(mac);
	if (mac->mac_phy.type == BWN_PHYTYPE_G) {
		hf |= BWN_HF_GPHY_SYM_WORKAROUND;
		if (siba_sprom_get_bf_lo(sc->sc_dev) & BWN_BFL_PACTRL)
			hf |= BWN_HF_PAGAINBOOST_OFDM_ON;
		if (mac->mac_phy.rev == 1)
			hf |= BWN_HF_GPHY_DC_CANCELFILTER;
	}
	if (mac->mac_phy.rf_ver == 0x2050) {
		if (mac->mac_phy.rf_rev < 6)
			hf |= BWN_HF_FORCE_VCO_RECALC;
		if (mac->mac_phy.rf_rev == 6)
			hf |= BWN_HF_4318_TSSI;
	}
	if (siba_sprom_get_bf_lo(sc->sc_dev) & BWN_BFL_CRYSTAL_NOSLOW)
		hf |= BWN_HF_SLOWCLOCK_REQ_OFF;
	if ((siba_get_type(sc->sc_dev) == SIBA_TYPE_PCI) &&
	    (siba_get_pcicore_revid(sc->sc_dev) <= 10))
		hf |= BWN_HF_PCI_SLOWCLOCK_WORKAROUND;
	hf &= ~BWN_HF_SKIP_CFP_UPDATE;
	bwn_hf_write(mac, hf);

	bwn_set_txretry(mac, BWN_RETRY_SHORT, BWN_RETRY_LONG);
	bwn_shm_write_2(mac, BWN_SHARED, BWN_SHARED_SHORT_RETRY_FALLBACK, 3);
	bwn_shm_write_2(mac, BWN_SHARED, BWN_SHARED_LONG_RETRY_FALLBACK, 2);
	bwn_shm_write_2(mac, BWN_SHARED, BWN_SHARED_PROBE_RESP_MAXTIME, 1);

	bwn_rate_init(mac);
	bwn_set_phytxctl(mac);

	bwn_shm_write_2(mac, BWN_SCRATCH, BWN_SCRATCH_CONT_MIN,
	    (mac->mac_phy.type == BWN_PHYTYPE_B) ? 0x1f : 0xf);
	bwn_shm_write_2(mac, BWN_SCRATCH, BWN_SCRATCH_CONT_MAX, 0x3ff);

	if (siba_get_type(sc->sc_dev) == SIBA_TYPE_PCMCIA || bwn_usedma == 0)
		bwn_pio_init(mac);
	else
		bwn_dma_init(mac);
	bwn_wme_init(mac);
	bwn_spu_setdelay(mac, 1);
	bwn_bt_enable(mac);

	siba_powerup(sc->sc_dev,
	    !(siba_sprom_get_bf_lo(sc->sc_dev) & BWN_BFL_CRYSTAL_NOSLOW));
	bwn_set_macaddr(mac);
	bwn_crypt_init(mac);

	/* XXX LED initializatin */

	mac->mac_status = BWN_MAC_STATUS_INITED;

	return (error);

fail0:
	siba_powerdown(sc->sc_dev);
	KASSERT(mac->mac_status == BWN_MAC_STATUS_UNINIT,
	    ("%s:%d: fail", __func__, __LINE__));
	return (error);
}

static void
bwn_core_start(struct bwn_mac *mac)
{
	struct bwn_softc *sc = mac->mac_sc;
	uint32_t tmp;

	KASSERT(mac->mac_status == BWN_MAC_STATUS_INITED,
	    ("%s:%d: fail", __func__, __LINE__));

	if (siba_get_revid(sc->sc_dev) < 5)
		return;

	while (1) {
		tmp = BWN_READ_4(mac, BWN_XMITSTAT_0);
		if (!(tmp & 0x00000001))
			break;
		tmp = BWN_READ_4(mac, BWN_XMITSTAT_1);
	}

	bwn_mac_enable(mac);
	BWN_WRITE_4(mac, BWN_INTR_MASK, mac->mac_intr_mask);
	callout_reset(&sc->sc_task_ch, hz * 15, bwn_tasks, mac);

	mac->mac_status = BWN_MAC_STATUS_STARTED;
}

static void
bwn_core_exit(struct bwn_mac *mac)
{
	struct bwn_softc *sc = mac->mac_sc;
	uint32_t macctl;

	BWN_ASSERT_LOCKED(mac->mac_sc);

	KASSERT(mac->mac_status <= BWN_MAC_STATUS_INITED,
	    ("%s:%d: fail", __func__, __LINE__));

	if (mac->mac_status != BWN_MAC_STATUS_INITED)
		return;
	mac->mac_status = BWN_MAC_STATUS_UNINIT;

	macctl = BWN_READ_4(mac, BWN_MACCTL);
	macctl &= ~BWN_MACCTL_MCODE_RUN;
	macctl |= BWN_MACCTL_MCODE_JMP0;
	BWN_WRITE_4(mac, BWN_MACCTL, macctl);

	bwn_dma_stop(mac);
	bwn_pio_stop(mac);
	bwn_chip_exit(mac);
	mac->mac_phy.switch_analog(mac, 0);
	siba_dev_down(sc->sc_dev, 0);
	siba_powerdown(sc->sc_dev);
}

static void
bwn_bt_disable(struct bwn_mac *mac)
{
	struct bwn_softc *sc = mac->mac_sc;

	(void)sc;
	/* XXX do nothing yet */
}

static int
bwn_chip_init(struct bwn_mac *mac)
{
	struct bwn_softc *sc = mac->mac_sc;
	struct bwn_phy *phy = &mac->mac_phy;
	uint32_t macctl;
	int error;

	macctl = BWN_MACCTL_IHR_ON | BWN_MACCTL_SHM_ON | BWN_MACCTL_STA;
	if (phy->gmode)
		macctl |= BWN_MACCTL_GMODE;
	BWN_WRITE_4(mac, BWN_MACCTL, macctl);

	error = bwn_fw_fillinfo(mac);
	if (error)
		return (error);
	error = bwn_fw_loaducode(mac);
	if (error)
		return (error);

	error = bwn_gpio_init(mac);
	if (error)
		return (error);

	error = bwn_fw_loadinitvals(mac);
	if (error) {
		siba_gpio_set(sc->sc_dev, 0);
		return (error);
	}
	phy->switch_analog(mac, 1);
	error = bwn_phy_init(mac);
	if (error) {
		siba_gpio_set(sc->sc_dev, 0);
		return (error);
	}
	if (phy->set_im)
		phy->set_im(mac, BWN_IMMODE_NONE);
	if (phy->set_antenna)
		phy->set_antenna(mac, BWN_ANT_DEFAULT);
	bwn_set_txantenna(mac, BWN_ANT_DEFAULT);

	if (phy->type == BWN_PHYTYPE_B)
		BWN_WRITE_2(mac, 0x005e, BWN_READ_2(mac, 0x005e) | 0x0004);
	BWN_WRITE_4(mac, 0x0100, 0x01000000);
	if (siba_get_revid(sc->sc_dev) < 5)
		BWN_WRITE_4(mac, 0x010c, 0x01000000);

	BWN_WRITE_4(mac, BWN_MACCTL,
	    BWN_READ_4(mac, BWN_MACCTL) & ~BWN_MACCTL_STA);
	BWN_WRITE_4(mac, BWN_MACCTL,
	    BWN_READ_4(mac, BWN_MACCTL) | BWN_MACCTL_STA);
	bwn_shm_write_2(mac, BWN_SHARED, 0x0074, 0x0000);

	bwn_set_opmode(mac);
	if (siba_get_revid(sc->sc_dev) < 3) {
		BWN_WRITE_2(mac, 0x060e, 0x0000);
		BWN_WRITE_2(mac, 0x0610, 0x8000);
		BWN_WRITE_2(mac, 0x0604, 0x0000);
		BWN_WRITE_2(mac, 0x0606, 0x0200);
	} else {
		BWN_WRITE_4(mac, 0x0188, 0x80000000);
		BWN_WRITE_4(mac, 0x018c, 0x02000000);
	}
	BWN_WRITE_4(mac, BWN_INTR_REASON, 0x00004000);
	BWN_WRITE_4(mac, BWN_DMA0_INTR_MASK, 0x0001dc00);
	BWN_WRITE_4(mac, BWN_DMA1_INTR_MASK, 0x0000dc00);
	BWN_WRITE_4(mac, BWN_DMA2_INTR_MASK, 0x0000dc00);
	BWN_WRITE_4(mac, BWN_DMA3_INTR_MASK, 0x0001dc00);
	BWN_WRITE_4(mac, BWN_DMA4_INTR_MASK, 0x0000dc00);
	BWN_WRITE_4(mac, BWN_DMA5_INTR_MASK, 0x0000dc00);

	bwn_mac_phy_clock_set(mac, true);

	/* SIBA powerup */
	/* XXX TODO: BCMA powerup */
	BWN_WRITE_2(mac, BWN_POWERUP_DELAY, siba_get_cc_powerdelay(sc->sc_dev));
	return (error);
}

/* read hostflags */
uint64_t
bwn_hf_read(struct bwn_mac *mac)
{
	uint64_t ret;

	ret = bwn_shm_read_2(mac, BWN_SHARED, BWN_SHARED_HFHI);
	ret <<= 16;
	ret |= bwn_shm_read_2(mac, BWN_SHARED, BWN_SHARED_HFMI);
	ret <<= 16;
	ret |= bwn_shm_read_2(mac, BWN_SHARED, BWN_SHARED_HFLO);
	return (ret);
}

void
bwn_hf_write(struct bwn_mac *mac, uint64_t value)
{

	bwn_shm_write_2(mac, BWN_SHARED, BWN_SHARED_HFLO,
	    (value & 0x00000000ffffull));
	bwn_shm_write_2(mac, BWN_SHARED, BWN_SHARED_HFMI,
	    (value & 0x0000ffff0000ull) >> 16);
	bwn_shm_write_2(mac, BWN_SHARED, BWN_SHARED_HFHI,
	    (value & 0xffff00000000ULL) >> 32);
}

static void
bwn_set_txretry(struct bwn_mac *mac, int s, int l)
{

	bwn_shm_write_2(mac, BWN_SCRATCH, BWN_SCRATCH_SHORT_RETRY, MIN(s, 0xf));
	bwn_shm_write_2(mac, BWN_SCRATCH, BWN_SCRATCH_LONG_RETRY, MIN(l, 0xf));
}

static void
bwn_rate_init(struct bwn_mac *mac)
{

	switch (mac->mac_phy.type) {
	case BWN_PHYTYPE_A:
	case BWN_PHYTYPE_G:
	case BWN_PHYTYPE_LP:
	case BWN_PHYTYPE_N:
		bwn_rate_write(mac, BWN_OFDM_RATE_6MB, 1);
		bwn_rate_write(mac, BWN_OFDM_RATE_12MB, 1);
		bwn_rate_write(mac, BWN_OFDM_RATE_18MB, 1);
		bwn_rate_write(mac, BWN_OFDM_RATE_24MB, 1);
		bwn_rate_write(mac, BWN_OFDM_RATE_36MB, 1);
		bwn_rate_write(mac, BWN_OFDM_RATE_48MB, 1);
		bwn_rate_write(mac, BWN_OFDM_RATE_54MB, 1);
		if (mac->mac_phy.type == BWN_PHYTYPE_A)
			break;
		/* FALLTHROUGH */
	case BWN_PHYTYPE_B:
		bwn_rate_write(mac, BWN_CCK_RATE_1MB, 0);
		bwn_rate_write(mac, BWN_CCK_RATE_2MB, 0);
		bwn_rate_write(mac, BWN_CCK_RATE_5MB, 0);
		bwn_rate_write(mac, BWN_CCK_RATE_11MB, 0);
		break;
	default:
		KASSERT(0 == 1, ("%s:%d: fail", __func__, __LINE__));
	}
}

static void
bwn_rate_write(struct bwn_mac *mac, uint16_t rate, int ofdm)
{
	uint16_t offset;

	if (ofdm) {
		offset = 0x480;
		offset += (bwn_plcp_getofdm(rate) & 0x000f) * 2;
	} else {
		offset = 0x4c0;
		offset += (bwn_plcp_getcck(rate) & 0x000f) * 2;
	}
	bwn_shm_write_2(mac, BWN_SHARED, offset + 0x20,
	    bwn_shm_read_2(mac, BWN_SHARED, offset));
}

static uint8_t
bwn_plcp_getcck(const uint8_t bitrate)
{

	switch (bitrate) {
	case BWN_CCK_RATE_1MB:
		return (0x0a);
	case BWN_CCK_RATE_2MB:
		return (0x14);
	case BWN_CCK_RATE_5MB:
		return (0x37);
	case BWN_CCK_RATE_11MB:
		return (0x6e);
	}
	KASSERT(0 == 1, ("%s:%d: fail", __func__, __LINE__));
	return (0);
}

static uint8_t
bwn_plcp_getofdm(const uint8_t bitrate)
{

	switch (bitrate) {
	case BWN_OFDM_RATE_6MB:
		return (0xb);
	case BWN_OFDM_RATE_9MB:
		return (0xf);
	case BWN_OFDM_RATE_12MB:
		return (0xa);
	case BWN_OFDM_RATE_18MB:
		return (0xe);
	case BWN_OFDM_RATE_24MB:
		return (0x9);
	case BWN_OFDM_RATE_36MB:
		return (0xd);
	case BWN_OFDM_RATE_48MB:
		return (0x8);
	case BWN_OFDM_RATE_54MB:
		return (0xc);
	}
	KASSERT(0 == 1, ("%s:%d: fail", __func__, __LINE__));
	return (0);
}

static void
bwn_set_phytxctl(struct bwn_mac *mac)
{
	uint16_t ctl;

	ctl = (BWN_TX_PHY_ENC_CCK | BWN_TX_PHY_ANT01AUTO |
	    BWN_TX_PHY_TXPWR);
	bwn_shm_write_2(mac, BWN_SHARED, BWN_SHARED_BEACON_PHYCTL, ctl);
	bwn_shm_write_2(mac, BWN_SHARED, BWN_SHARED_ACKCTS_PHYCTL, ctl);
	bwn_shm_write_2(mac, BWN_SHARED, BWN_SHARED_PROBE_RESP_PHYCTL, ctl);
}

static void
bwn_pio_init(struct bwn_mac *mac)
{
	struct bwn_pio *pio = &mac->mac_method.pio;

	BWN_WRITE_4(mac, BWN_MACCTL, BWN_READ_4(mac, BWN_MACCTL)
	    & ~BWN_MACCTL_BIGENDIAN);
	bwn_shm_write_2(mac, BWN_SHARED, BWN_SHARED_RX_PADOFFSET, 0);

	bwn_pio_set_txqueue(mac, &pio->wme[WME_AC_BK], 0);
	bwn_pio_set_txqueue(mac, &pio->wme[WME_AC_BE], 1);
	bwn_pio_set_txqueue(mac, &pio->wme[WME_AC_VI], 2);
	bwn_pio_set_txqueue(mac, &pio->wme[WME_AC_VO], 3);
	bwn_pio_set_txqueue(mac, &pio->mcast, 4);
	bwn_pio_setupqueue_rx(mac, &pio->rx, 0);
}

static void
bwn_pio_set_txqueue(struct bwn_mac *mac, struct bwn_pio_txqueue *tq,
    int index)
{
	struct bwn_pio_txpkt *tp;
	struct bwn_softc *sc = mac->mac_sc;
	unsigned int i;

	tq->tq_base = bwn_pio_idx2base(mac, index) + BWN_PIO_TXQOFFSET(mac);
	tq->tq_index = index;

	tq->tq_free = BWN_PIO_MAX_TXPACKETS;
	if (siba_get_revid(sc->sc_dev) >= 8)
		tq->tq_size = 1920;
	else {
		tq->tq_size = bwn_pio_read_2(mac, tq, BWN_PIO_TXQBUFSIZE);
		tq->tq_size -= 80;
	}

	TAILQ_INIT(&tq->tq_pktlist);
	for (i = 0; i < N(tq->tq_pkts); i++) {
		tp = &(tq->tq_pkts[i]);
		tp->tp_index = i;
		tp->tp_queue = tq;
		TAILQ_INSERT_TAIL(&tq->tq_pktlist, tp, tp_list);
	}
}

static uint16_t
bwn_pio_idx2base(struct bwn_mac *mac, int index)
{
	struct bwn_softc *sc = mac->mac_sc;
	static const uint16_t bases[] = {
		BWN_PIO_BASE0,
		BWN_PIO_BASE1,
		BWN_PIO_BASE2,
		BWN_PIO_BASE3,
		BWN_PIO_BASE4,
		BWN_PIO_BASE5,
		BWN_PIO_BASE6,
		BWN_PIO_BASE7,
	};
	static const uint16_t bases_rev11[] = {
		BWN_PIO11_BASE0,
		BWN_PIO11_BASE1,
		BWN_PIO11_BASE2,
		BWN_PIO11_BASE3,
		BWN_PIO11_BASE4,
		BWN_PIO11_BASE5,
	};

	if (siba_get_revid(sc->sc_dev) >= 11) {
		if (index >= N(bases_rev11))
			device_printf(sc->sc_dev, "%s: warning\n", __func__);
		return (bases_rev11[index]);
	}
	if (index >= N(bases))
		device_printf(sc->sc_dev, "%s: warning\n", __func__);
	return (bases[index]);
}

static void
bwn_pio_setupqueue_rx(struct bwn_mac *mac, struct bwn_pio_rxqueue *prq,
    int index)
{
	struct bwn_softc *sc = mac->mac_sc;

	prq->prq_mac = mac;
	prq->prq_rev = siba_get_revid(sc->sc_dev);
	prq->prq_base = bwn_pio_idx2base(mac, index) + BWN_PIO_RXQOFFSET(mac);
	bwn_dma_rxdirectfifo(mac, index, 1);
}

static void
bwn_destroy_pioqueue_tx(struct bwn_pio_txqueue *tq)
{
	if (tq == NULL)
		return;
	bwn_pio_cancel_tx_packets(tq);
}

static void
bwn_destroy_queue_tx(struct bwn_pio_txqueue *pio)
{

	bwn_destroy_pioqueue_tx(pio);
}

static uint16_t
bwn_pio_read_2(struct bwn_mac *mac, struct bwn_pio_txqueue *tq,
    uint16_t offset)
{

	return (BWN_READ_2(mac, tq->tq_base + offset));
}

static void
bwn_dma_rxdirectfifo(struct bwn_mac *mac, int idx, uint8_t enable)
{
	uint32_t ctl;
	int type;
	uint16_t base;

	type = bwn_dma_mask2type(bwn_dma_mask(mac));
	base = bwn_dma_base(type, idx);
	if (type == BWN_DMA_64BIT) {
		ctl = BWN_READ_4(mac, base + BWN_DMA64_RXCTL);
		ctl &= ~BWN_DMA64_RXDIRECTFIFO;
		if (enable)
			ctl |= BWN_DMA64_RXDIRECTFIFO;
		BWN_WRITE_4(mac, base + BWN_DMA64_RXCTL, ctl);
	} else {
		ctl = BWN_READ_4(mac, base + BWN_DMA32_RXCTL);
		ctl &= ~BWN_DMA32_RXDIRECTFIFO;
		if (enable)
			ctl |= BWN_DMA32_RXDIRECTFIFO;
		BWN_WRITE_4(mac, base + BWN_DMA32_RXCTL, ctl);
	}
}

static uint64_t
bwn_dma_mask(struct bwn_mac *mac)
{
	uint32_t tmp;
	uint16_t base;

	tmp = BWN_READ_4(mac, SIBA_TGSHIGH);
	if (tmp & SIBA_TGSHIGH_DMA64)
		return (BWN_DMA_BIT_MASK(64));
	base = bwn_dma_base(0, 0);
	BWN_WRITE_4(mac, base + BWN_DMA32_TXCTL, BWN_DMA32_TXADDREXT_MASK);
	tmp = BWN_READ_4(mac, base + BWN_DMA32_TXCTL);
	if (tmp & BWN_DMA32_TXADDREXT_MASK)
		return (BWN_DMA_BIT_MASK(32));

	return (BWN_DMA_BIT_MASK(30));
}

static int
bwn_dma_mask2type(uint64_t dmamask)
{

	if (dmamask == BWN_DMA_BIT_MASK(30))
		return (BWN_DMA_30BIT);
	if (dmamask == BWN_DMA_BIT_MASK(32))
		return (BWN_DMA_32BIT);
	if (dmamask == BWN_DMA_BIT_MASK(64))
		return (BWN_DMA_64BIT);
	KASSERT(0 == 1, ("%s:%d: fail", __func__, __LINE__));
	return (BWN_DMA_30BIT);
}

static void
bwn_pio_cancel_tx_packets(struct bwn_pio_txqueue *tq)
{
	struct bwn_pio_txpkt *tp;
	unsigned int i;

	for (i = 0; i < N(tq->tq_pkts); i++) {
		tp = &(tq->tq_pkts[i]);
		if (tp->tp_m) {
			m_freem(tp->tp_m);
			tp->tp_m = NULL;
		}
	}
}

static uint16_t
bwn_dma_base(int type, int controller_idx)
{
	static const uint16_t map64[] = {
		BWN_DMA64_BASE0,
		BWN_DMA64_BASE1,
		BWN_DMA64_BASE2,
		BWN_DMA64_BASE3,
		BWN_DMA64_BASE4,
		BWN_DMA64_BASE5,
	};
	static const uint16_t map32[] = {
		BWN_DMA32_BASE0,
		BWN_DMA32_BASE1,
		BWN_DMA32_BASE2,
		BWN_DMA32_BASE3,
		BWN_DMA32_BASE4,
		BWN_DMA32_BASE5,
	};

	if (type == BWN_DMA_64BIT) {
		KASSERT(controller_idx >= 0 && controller_idx < N(map64),
		    ("%s:%d: fail", __func__, __LINE__));
		return (map64[controller_idx]);
	}
	KASSERT(controller_idx >= 0 && controller_idx < N(map32),
	    ("%s:%d: fail", __func__, __LINE__));
	return (map32[controller_idx]);
}

static void
bwn_dma_init(struct bwn_mac *mac)
{
	struct bwn_dma *dma = &mac->mac_method.dma;

	/* setup TX DMA channels. */
	bwn_dma_setup(dma->wme[WME_AC_BK]);
	bwn_dma_setup(dma->wme[WME_AC_BE]);
	bwn_dma_setup(dma->wme[WME_AC_VI]);
	bwn_dma_setup(dma->wme[WME_AC_VO]);
	bwn_dma_setup(dma->mcast);
	/* setup RX DMA channel. */
	bwn_dma_setup(dma->rx);
}

static struct bwn_dma_ring *
bwn_dma_ringsetup(struct bwn_mac *mac, int controller_index,
    int for_tx, int type)
{
	struct bwn_dma *dma = &mac->mac_method.dma;
	struct bwn_dma_ring *dr;
	struct bwn_dmadesc_generic *desc;
	struct bwn_dmadesc_meta *mt;
	struct bwn_softc *sc = mac->mac_sc;
	int error, i;

	dr = malloc(sizeof(*dr), M_DEVBUF, M_NOWAIT | M_ZERO);
	if (dr == NULL)
		goto out;
	dr->dr_numslots = BWN_RXRING_SLOTS;
	if (for_tx)
		dr->dr_numslots = BWN_TXRING_SLOTS;

	dr->dr_meta = malloc(dr->dr_numslots * sizeof(struct bwn_dmadesc_meta),
	    M_DEVBUF, M_NOWAIT | M_ZERO);
	if (dr->dr_meta == NULL)
		goto fail0;

	dr->dr_type = type;
	dr->dr_mac = mac;
	dr->dr_base = bwn_dma_base(type, controller_index);
	dr->dr_index = controller_index;
	if (type == BWN_DMA_64BIT) {
		dr->getdesc = bwn_dma_64_getdesc;
		dr->setdesc = bwn_dma_64_setdesc;
		dr->start_transfer = bwn_dma_64_start_transfer;
		dr->suspend = bwn_dma_64_suspend;
		dr->resume = bwn_dma_64_resume;
		dr->get_curslot = bwn_dma_64_get_curslot;
		dr->set_curslot = bwn_dma_64_set_curslot;
	} else {
		dr->getdesc = bwn_dma_32_getdesc;
		dr->setdesc = bwn_dma_32_setdesc;
		dr->start_transfer = bwn_dma_32_start_transfer;
		dr->suspend = bwn_dma_32_suspend;
		dr->resume = bwn_dma_32_resume;
		dr->get_curslot = bwn_dma_32_get_curslot;
		dr->set_curslot = bwn_dma_32_set_curslot;
	}
	if (for_tx) {
		dr->dr_tx = 1;
		dr->dr_curslot = -1;
	} else {
		if (dr->dr_index == 0) {
			dr->dr_rx_bufsize = BWN_DMA0_RX_BUFFERSIZE;
			dr->dr_frameoffset = BWN_DMA0_RX_FRAMEOFFSET;
		} else
			KASSERT(0 == 1, ("%s:%d: fail", __func__, __LINE__));
	}

	error = bwn_dma_allocringmemory(dr);
	if (error)
		goto fail2;

	if (for_tx) {
		/*
		 * Assumption: BWN_TXRING_SLOTS can be divided by
		 * BWN_TX_SLOTS_PER_FRAME
		 */
		KASSERT(BWN_TXRING_SLOTS % BWN_TX_SLOTS_PER_FRAME == 0,
		    ("%s:%d: fail", __func__, __LINE__));

		dr->dr_txhdr_cache = contigmalloc(
		    (dr->dr_numslots / BWN_TX_SLOTS_PER_FRAME) *
		    BWN_HDRSIZE(mac), M_DEVBUF, M_ZERO,
		    0, BUS_SPACE_MAXADDR, 8, 0);
		if (dr->dr_txhdr_cache == NULL) {
			device_printf(sc->sc_dev,
			    "can't allocate TX header DMA memory\n");
			goto fail1;
		}

		/*
		 * Create TX ring DMA stuffs
		 */
		error = bus_dma_tag_create(dma->parent_dtag,
				    BWN_ALIGN, 0,
				    BUS_SPACE_MAXADDR,
				    BUS_SPACE_MAXADDR,
				    NULL, NULL,
				    BWN_HDRSIZE(mac),
				    1,
				    BUS_SPACE_MAXSIZE_32BIT,
				    0,
				    NULL, NULL,
				    &dr->dr_txring_dtag);
		if (error) {
			device_printf(sc->sc_dev,
			    "can't create TX ring DMA tag: TODO frees\n");
			goto fail2;
		}

		for (i = 0; i < dr->dr_numslots; i += 2) {
			dr->getdesc(dr, i, &desc, &mt);

			mt->mt_txtype = BWN_DMADESC_METATYPE_HEADER;
			mt->mt_m = NULL;
			mt->mt_ni = NULL;
			mt->mt_islast = 0;
			error = bus_dmamap_create(dr->dr_txring_dtag, 0,
			    &mt->mt_dmap);
			if (error) {
				device_printf(sc->sc_dev,
				     "can't create RX buf DMA map\n");
				goto fail2;
			}

			dr->getdesc(dr, i + 1, &desc, &mt);

			mt->mt_txtype = BWN_DMADESC_METATYPE_BODY;
			mt->mt_m = NULL;
			mt->mt_ni = NULL;
			mt->mt_islast = 1;
			error = bus_dmamap_create(dma->txbuf_dtag, 0,
			    &mt->mt_dmap);
			if (error) {
				device_printf(sc->sc_dev,
				     "can't create RX buf DMA map\n");
				goto fail2;
			}
		}
	} else {
		error = bus_dmamap_create(dma->rxbuf_dtag, 0,
		    &dr->dr_spare_dmap);
		if (error) {
			device_printf(sc->sc_dev,
			    "can't create RX buf DMA map\n");
			goto out;		/* XXX wrong! */
		}

		for (i = 0; i < dr->dr_numslots; i++) {
			dr->getdesc(dr, i, &desc, &mt);

			error = bus_dmamap_create(dma->rxbuf_dtag, 0,
			    &mt->mt_dmap);
			if (error) {
				device_printf(sc->sc_dev,
				    "can't create RX buf DMA map\n");
				goto out;	/* XXX wrong! */
			}
			error = bwn_dma_newbuf(dr, desc, mt, 1);
			if (error) {
				device_printf(sc->sc_dev,
				    "failed to allocate RX buf\n");
				goto out;	/* XXX wrong! */
			}
		}

		bus_dmamap_sync(dr->dr_ring_dtag, dr->dr_ring_dmap,
		    BUS_DMASYNC_PREWRITE);

		dr->dr_usedslot = dr->dr_numslots;
	}

      out:
	return (dr);

fail2:
	if (dr->dr_txhdr_cache != NULL) {
		contigfree(dr->dr_txhdr_cache,
		    (dr->dr_numslots / BWN_TX_SLOTS_PER_FRAME) *
		    BWN_HDRSIZE(mac), M_DEVBUF);
	}
fail1:
	free(dr->dr_meta, M_DEVBUF);
fail0:
	free(dr, M_DEVBUF);
	return (NULL);
}

static void
bwn_dma_ringfree(struct bwn_dma_ring **dr)
{

	if (dr == NULL)
		return;

	bwn_dma_free_descbufs(*dr);
	bwn_dma_free_ringmemory(*dr);

	if ((*dr)->dr_txhdr_cache != NULL) {
		contigfree((*dr)->dr_txhdr_cache,
		    ((*dr)->dr_numslots / BWN_TX_SLOTS_PER_FRAME) *
		    BWN_HDRSIZE((*dr)->dr_mac), M_DEVBUF);
	}
	free((*dr)->dr_meta, M_DEVBUF);
	free(*dr, M_DEVBUF);

	*dr = NULL;
}

static void
bwn_dma_32_getdesc(struct bwn_dma_ring *dr, int slot,
    struct bwn_dmadesc_generic **gdesc, struct bwn_dmadesc_meta **meta)
{
	struct bwn_dmadesc32 *desc;

	*meta = &(dr->dr_meta[slot]);
	desc = dr->dr_ring_descbase;
	desc = &(desc[slot]);

	*gdesc = (struct bwn_dmadesc_generic *)desc;
}

static void
bwn_dma_32_setdesc(struct bwn_dma_ring *dr,
    struct bwn_dmadesc_generic *desc, bus_addr_t dmaaddr, uint16_t bufsize,
    int start, int end, int irq)
{
	struct bwn_dmadesc32 *descbase = dr->dr_ring_descbase;
	struct bwn_softc *sc = dr->dr_mac->mac_sc;
	uint32_t addr, addrext, ctl;
	int slot;

	slot = (int)(&(desc->dma.dma32) - descbase);
	KASSERT(slot >= 0 && slot < dr->dr_numslots,
	    ("%s:%d: fail", __func__, __LINE__));

	addr = (uint32_t) (dmaaddr & ~SIBA_DMA_TRANSLATION_MASK);
	addrext = (uint32_t) (dmaaddr & SIBA_DMA_TRANSLATION_MASK) >> 30;
	addr |= siba_dma_translation(sc->sc_dev);
	ctl = bufsize & BWN_DMA32_DCTL_BYTECNT;
	if (slot == dr->dr_numslots - 1)
		ctl |= BWN_DMA32_DCTL_DTABLEEND;
	if (start)
		ctl |= BWN_DMA32_DCTL_FRAMESTART;
	if (end)
		ctl |= BWN_DMA32_DCTL_FRAMEEND;
	if (irq)
		ctl |= BWN_DMA32_DCTL_IRQ;
	ctl |= (addrext << BWN_DMA32_DCTL_ADDREXT_SHIFT)
	    & BWN_DMA32_DCTL_ADDREXT_MASK;

	desc->dma.dma32.control = htole32(ctl);
	desc->dma.dma32.address = htole32(addr);
}

static void
bwn_dma_32_start_transfer(struct bwn_dma_ring *dr, int slot)
{

	BWN_DMA_WRITE(dr, BWN_DMA32_TXINDEX,
	    (uint32_t)(slot * sizeof(struct bwn_dmadesc32)));
}

static void
bwn_dma_32_suspend(struct bwn_dma_ring *dr)
{

	BWN_DMA_WRITE(dr, BWN_DMA32_TXCTL,
	    BWN_DMA_READ(dr, BWN_DMA32_TXCTL) | BWN_DMA32_TXSUSPEND);
}

static void
bwn_dma_32_resume(struct bwn_dma_ring *dr)
{

	BWN_DMA_WRITE(dr, BWN_DMA32_TXCTL,
	    BWN_DMA_READ(dr, BWN_DMA32_TXCTL) & ~BWN_DMA32_TXSUSPEND);
}

static int
bwn_dma_32_get_curslot(struct bwn_dma_ring *dr)
{
	uint32_t val;

	val = BWN_DMA_READ(dr, BWN_DMA32_RXSTATUS);
	val &= BWN_DMA32_RXDPTR;

	return (val / sizeof(struct bwn_dmadesc32));
}

static void
bwn_dma_32_set_curslot(struct bwn_dma_ring *dr, int slot)
{

	BWN_DMA_WRITE(dr, BWN_DMA32_RXINDEX,
	    (uint32_t) (slot * sizeof(struct bwn_dmadesc32)));
}

static void
bwn_dma_64_getdesc(struct bwn_dma_ring *dr, int slot,
    struct bwn_dmadesc_generic **gdesc, struct bwn_dmadesc_meta **meta)
{
	struct bwn_dmadesc64 *desc;

	*meta = &(dr->dr_meta[slot]);
	desc = dr->dr_ring_descbase;
	desc = &(desc[slot]);

	*gdesc = (struct bwn_dmadesc_generic *)desc;
}

static void
bwn_dma_64_setdesc(struct bwn_dma_ring *dr,
    struct bwn_dmadesc_generic *desc, bus_addr_t dmaaddr, uint16_t bufsize,
    int start, int end, int irq)
{
	struct bwn_dmadesc64 *descbase = dr->dr_ring_descbase;
	struct bwn_softc *sc = dr->dr_mac->mac_sc;
	int slot;
	uint32_t ctl0 = 0, ctl1 = 0;
	uint32_t addrlo, addrhi;
	uint32_t addrext;

	slot = (int)(&(desc->dma.dma64) - descbase);
	KASSERT(slot >= 0 && slot < dr->dr_numslots,
	    ("%s:%d: fail", __func__, __LINE__));

	addrlo = (uint32_t) (dmaaddr & 0xffffffff);
	addrhi = (((uint64_t) dmaaddr >> 32) & ~SIBA_DMA_TRANSLATION_MASK);
	addrext = (((uint64_t) dmaaddr >> 32) & SIBA_DMA_TRANSLATION_MASK) >>
	    30;
	addrhi |= (siba_dma_translation(sc->sc_dev) << 1);
	if (slot == dr->dr_numslots - 1)
		ctl0 |= BWN_DMA64_DCTL0_DTABLEEND;
	if (start)
		ctl0 |= BWN_DMA64_DCTL0_FRAMESTART;
	if (end)
		ctl0 |= BWN_DMA64_DCTL0_FRAMEEND;
	if (irq)
		ctl0 |= BWN_DMA64_DCTL0_IRQ;
	ctl1 |= bufsize & BWN_DMA64_DCTL1_BYTECNT;
	ctl1 |= (addrext << BWN_DMA64_DCTL1_ADDREXT_SHIFT)
	    & BWN_DMA64_DCTL1_ADDREXT_MASK;

	desc->dma.dma64.control0 = htole32(ctl0);
	desc->dma.dma64.control1 = htole32(ctl1);
	desc->dma.dma64.address_low = htole32(addrlo);
	desc->dma.dma64.address_high = htole32(addrhi);
}

static void
bwn_dma_64_start_transfer(struct bwn_dma_ring *dr, int slot)
{

	BWN_DMA_WRITE(dr, BWN_DMA64_TXINDEX,
	    (uint32_t)(slot * sizeof(struct bwn_dmadesc64)));
}

static void
bwn_dma_64_suspend(struct bwn_dma_ring *dr)
{

	BWN_DMA_WRITE(dr, BWN_DMA64_TXCTL,
	    BWN_DMA_READ(dr, BWN_DMA64_TXCTL) | BWN_DMA64_TXSUSPEND);
}

static void
bwn_dma_64_resume(struct bwn_dma_ring *dr)
{

	BWN_DMA_WRITE(dr, BWN_DMA64_TXCTL,
	    BWN_DMA_READ(dr, BWN_DMA64_TXCTL) & ~BWN_DMA64_TXSUSPEND);
}

static int
bwn_dma_64_get_curslot(struct bwn_dma_ring *dr)
{
	uint32_t val;

	val = BWN_DMA_READ(dr, BWN_DMA64_RXSTATUS);
	val &= BWN_DMA64_RXSTATDPTR;

	return (val / sizeof(struct bwn_dmadesc64));
}

static void
bwn_dma_64_set_curslot(struct bwn_dma_ring *dr, int slot)
{

	BWN_DMA_WRITE(dr, BWN_DMA64_RXINDEX,
	    (uint32_t)(slot * sizeof(struct bwn_dmadesc64)));
}

static int
bwn_dma_allocringmemory(struct bwn_dma_ring *dr)
{
	struct bwn_mac *mac = dr->dr_mac;
	struct bwn_dma *dma = &mac->mac_method.dma;
	struct bwn_softc *sc = mac->mac_sc;
	int error;

	error = bus_dma_tag_create(dma->parent_dtag,
			    BWN_ALIGN, 0,
			    BUS_SPACE_MAXADDR,
			    BUS_SPACE_MAXADDR,
			    NULL, NULL,
			    BWN_DMA_RINGMEMSIZE,
			    1,
			    BUS_SPACE_MAXSIZE_32BIT,
			    0,
			    NULL, NULL,
			    &dr->dr_ring_dtag);
	if (error) {
		device_printf(sc->sc_dev,
		    "can't create TX ring DMA tag: TODO frees\n");
		return (-1);
	}

	error = bus_dmamem_alloc(dr->dr_ring_dtag,
	    &dr->dr_ring_descbase, BUS_DMA_WAITOK | BUS_DMA_ZERO,
	    &dr->dr_ring_dmap);
	if (error) {
		device_printf(sc->sc_dev,
		    "can't allocate DMA mem: TODO frees\n");
		return (-1);
	}
	error = bus_dmamap_load(dr->dr_ring_dtag, dr->dr_ring_dmap,
	    dr->dr_ring_descbase, BWN_DMA_RINGMEMSIZE,
	    bwn_dma_ring_addr, &dr->dr_ring_dmabase, BUS_DMA_NOWAIT);
	if (error) {
		device_printf(sc->sc_dev,
		    "can't load DMA mem: TODO free\n");
		return (-1);
	}

	return (0);
}

static void
bwn_dma_setup(struct bwn_dma_ring *dr)
{
	struct bwn_softc *sc = dr->dr_mac->mac_sc;
	uint64_t ring64;
	uint32_t addrext, ring32, value;
	uint32_t trans = siba_dma_translation(sc->sc_dev);

	if (dr->dr_tx) {
		dr->dr_curslot = -1;

		if (dr->dr_type == BWN_DMA_64BIT) {
			ring64 = (uint64_t)(dr->dr_ring_dmabase);
			addrext = ((ring64 >> 32) & SIBA_DMA_TRANSLATION_MASK)
			    >> 30;
			value = BWN_DMA64_TXENABLE;
			value |= (addrext << BWN_DMA64_TXADDREXT_SHIFT)
			    & BWN_DMA64_TXADDREXT_MASK;
			BWN_DMA_WRITE(dr, BWN_DMA64_TXCTL, value);
			BWN_DMA_WRITE(dr, BWN_DMA64_TXRINGLO,
			    (ring64 & 0xffffffff));
			BWN_DMA_WRITE(dr, BWN_DMA64_TXRINGHI,
			    ((ring64 >> 32) &
			    ~SIBA_DMA_TRANSLATION_MASK) | (trans << 1));
		} else {
			ring32 = (uint32_t)(dr->dr_ring_dmabase);
			addrext = (ring32 & SIBA_DMA_TRANSLATION_MASK) >> 30;
			value = BWN_DMA32_TXENABLE;
			value |= (addrext << BWN_DMA32_TXADDREXT_SHIFT)
			    & BWN_DMA32_TXADDREXT_MASK;
			BWN_DMA_WRITE(dr, BWN_DMA32_TXCTL, value);
			BWN_DMA_WRITE(dr, BWN_DMA32_TXRING,
			    (ring32 & ~SIBA_DMA_TRANSLATION_MASK) | trans);
		}
		return;
	}

	/*
	 * set for RX
	 */
	dr->dr_usedslot = dr->dr_numslots;

	if (dr->dr_type == BWN_DMA_64BIT) {
		ring64 = (uint64_t)(dr->dr_ring_dmabase);
		addrext = ((ring64 >> 32) & SIBA_DMA_TRANSLATION_MASK) >> 30;
		value = (dr->dr_frameoffset << BWN_DMA64_RXFROFF_SHIFT);
		value |= BWN_DMA64_RXENABLE;
		value |= (addrext << BWN_DMA64_RXADDREXT_SHIFT)
		    & BWN_DMA64_RXADDREXT_MASK;
		BWN_DMA_WRITE(dr, BWN_DMA64_RXCTL, value);
		BWN_DMA_WRITE(dr, BWN_DMA64_RXRINGLO, (ring64 & 0xffffffff));
		BWN_DMA_WRITE(dr, BWN_DMA64_RXRINGHI,
		    ((ring64 >> 32) & ~SIBA_DMA_TRANSLATION_MASK)
		    | (trans << 1));
		BWN_DMA_WRITE(dr, BWN_DMA64_RXINDEX, dr->dr_numslots *
		    sizeof(struct bwn_dmadesc64));
	} else {
		ring32 = (uint32_t)(dr->dr_ring_dmabase);
		addrext = (ring32 & SIBA_DMA_TRANSLATION_MASK) >> 30;
		value = (dr->dr_frameoffset << BWN_DMA32_RXFROFF_SHIFT);
		value |= BWN_DMA32_RXENABLE;
		value |= (addrext << BWN_DMA32_RXADDREXT_SHIFT)
		    & BWN_DMA32_RXADDREXT_MASK;
		BWN_DMA_WRITE(dr, BWN_DMA32_RXCTL, value);
		BWN_DMA_WRITE(dr, BWN_DMA32_RXRING,
		    (ring32 & ~SIBA_DMA_TRANSLATION_MASK) | trans);
		BWN_DMA_WRITE(dr, BWN_DMA32_RXINDEX, dr->dr_numslots *
		    sizeof(struct bwn_dmadesc32));
	}
}

static void
bwn_dma_free_ringmemory(struct bwn_dma_ring *dr)
{

	bus_dmamap_unload(dr->dr_ring_dtag, dr->dr_ring_dmap);
	bus_dmamem_free(dr->dr_ring_dtag, dr->dr_ring_descbase,
	    dr->dr_ring_dmap);
}

static void
bwn_dma_cleanup(struct bwn_dma_ring *dr)
{

	if (dr->dr_tx) {
		bwn_dma_tx_reset(dr->dr_mac, dr->dr_base, dr->dr_type);
		if (dr->dr_type == BWN_DMA_64BIT) {
			BWN_DMA_WRITE(dr, BWN_DMA64_TXRINGLO, 0);
			BWN_DMA_WRITE(dr, BWN_DMA64_TXRINGHI, 0);
		} else
			BWN_DMA_WRITE(dr, BWN_DMA32_TXRING, 0);
	} else {
		bwn_dma_rx_reset(dr->dr_mac, dr->dr_base, dr->dr_type);
		if (dr->dr_type == BWN_DMA_64BIT) {
			BWN_DMA_WRITE(dr, BWN_DMA64_RXRINGLO, 0);
			BWN_DMA_WRITE(dr, BWN_DMA64_RXRINGHI, 0);
		} else
			BWN_DMA_WRITE(dr, BWN_DMA32_RXRING, 0);
	}
}

static void
bwn_dma_free_descbufs(struct bwn_dma_ring *dr)
{
	struct bwn_dmadesc_generic *desc;
	struct bwn_dmadesc_meta *meta;
	struct bwn_mac *mac = dr->dr_mac;
	struct bwn_dma *dma = &mac->mac_method.dma;
	struct bwn_softc *sc = mac->mac_sc;
	int i;

	if (!dr->dr_usedslot)
		return;
	for (i = 0; i < dr->dr_numslots; i++) {
		dr->getdesc(dr, i, &desc, &meta);

		if (meta->mt_m == NULL) {
			if (!dr->dr_tx)
				device_printf(sc->sc_dev, "%s: not TX?\n",
				    __func__);
			continue;
		}
		if (dr->dr_tx) {
			if (meta->mt_txtype == BWN_DMADESC_METATYPE_HEADER)
				bus_dmamap_unload(dr->dr_txring_dtag,
				    meta->mt_dmap);
			else if (meta->mt_txtype == BWN_DMADESC_METATYPE_BODY)
				bus_dmamap_unload(dma->txbuf_dtag,
				    meta->mt_dmap);
		} else
			bus_dmamap_unload(dma->rxbuf_dtag, meta->mt_dmap);
		bwn_dma_free_descbuf(dr, meta);
	}
}

static int
bwn_dma_tx_reset(struct bwn_mac *mac, uint16_t base,
    int type)
{
	struct bwn_softc *sc = mac->mac_sc;
	uint32_t value;
	int i;
	uint16_t offset;

	for (i = 0; i < 10; i++) {
		offset = (type == BWN_DMA_64BIT) ? BWN_DMA64_TXSTATUS :
		    BWN_DMA32_TXSTATUS;
		value = BWN_READ_4(mac, base + offset);
		if (type == BWN_DMA_64BIT) {
			value &= BWN_DMA64_TXSTAT;
			if (value == BWN_DMA64_TXSTAT_DISABLED ||
			    value == BWN_DMA64_TXSTAT_IDLEWAIT ||
			    value == BWN_DMA64_TXSTAT_STOPPED)
				break;
		} else {
			value &= BWN_DMA32_TXSTATE;
			if (value == BWN_DMA32_TXSTAT_DISABLED ||
			    value == BWN_DMA32_TXSTAT_IDLEWAIT ||
			    value == BWN_DMA32_TXSTAT_STOPPED)
				break;
		}
		DELAY(1000);
	}
	offset = (type == BWN_DMA_64BIT) ? BWN_DMA64_TXCTL : BWN_DMA32_TXCTL;
	BWN_WRITE_4(mac, base + offset, 0);
	for (i = 0; i < 10; i++) {
		offset = (type == BWN_DMA_64BIT) ? BWN_DMA64_TXSTATUS :
						   BWN_DMA32_TXSTATUS;
		value = BWN_READ_4(mac, base + offset);
		if (type == BWN_DMA_64BIT) {
			value &= BWN_DMA64_TXSTAT;
			if (value == BWN_DMA64_TXSTAT_DISABLED) {
				i = -1;
				break;
			}
		} else {
			value &= BWN_DMA32_TXSTATE;
			if (value == BWN_DMA32_TXSTAT_DISABLED) {
				i = -1;
				break;
			}
		}
		DELAY(1000);
	}
	if (i != -1) {
		device_printf(sc->sc_dev, "%s: timed out\n", __func__);
		return (ENODEV);
	}
	DELAY(1000);

	return (0);
}

static int
bwn_dma_rx_reset(struct bwn_mac *mac, uint16_t base,
    int type)
{
	struct bwn_softc *sc = mac->mac_sc;
	uint32_t value;
	int i;
	uint16_t offset;

	offset = (type == BWN_DMA_64BIT) ? BWN_DMA64_RXCTL : BWN_DMA32_RXCTL;
	BWN_WRITE_4(mac, base + offset, 0);
	for (i = 0; i < 10; i++) {
		offset = (type == BWN_DMA_64BIT) ? BWN_DMA64_RXSTATUS :
		    BWN_DMA32_RXSTATUS;
		value = BWN_READ_4(mac, base + offset);
		if (type == BWN_DMA_64BIT) {
			value &= BWN_DMA64_RXSTAT;
			if (value == BWN_DMA64_RXSTAT_DISABLED) {
				i = -1;
				break;
			}
		} else {
			value &= BWN_DMA32_RXSTATE;
			if (value == BWN_DMA32_RXSTAT_DISABLED) {
				i = -1;
				break;
			}
		}
		DELAY(1000);
	}
	if (i != -1) {
		device_printf(sc->sc_dev, "%s: timed out\n", __func__);
		return (ENODEV);
	}

	return (0);
}

static void
bwn_dma_free_descbuf(struct bwn_dma_ring *dr,
    struct bwn_dmadesc_meta *meta)
{

	if (meta->mt_m != NULL) {
		m_freem(meta->mt_m);
		meta->mt_m = NULL;
	}
	if (meta->mt_ni != NULL) {
		ieee80211_free_node(meta->mt_ni);
		meta->mt_ni = NULL;
	}
}

static void
bwn_dma_set_redzone(struct bwn_dma_ring *dr, struct mbuf *m)
{
	struct bwn_rxhdr4 *rxhdr;
	unsigned char *frame;

	rxhdr = mtod(m, struct bwn_rxhdr4 *);
	rxhdr->frame_len = 0;

	KASSERT(dr->dr_rx_bufsize >= dr->dr_frameoffset +
	    sizeof(struct bwn_plcp6) + 2,
	    ("%s:%d: fail", __func__, __LINE__));
	frame = mtod(m, char *) + dr->dr_frameoffset;
	memset(frame, 0xff, sizeof(struct bwn_plcp6) + 2 /* padding */);
}

static uint8_t
bwn_dma_check_redzone(struct bwn_dma_ring *dr, struct mbuf *m)
{
	unsigned char *f = mtod(m, char *) + dr->dr_frameoffset;

	return ((f[0] & f[1] & f[2] & f[3] & f[4] & f[5] & f[6] & f[7])
	    == 0xff);
}

static void
bwn_wme_init(struct bwn_mac *mac)
{

	bwn_wme_load(mac);

	/* enable WME support. */
	bwn_hf_write(mac, bwn_hf_read(mac) | BWN_HF_EDCF);
	BWN_WRITE_2(mac, BWN_IFSCTL, BWN_READ_2(mac, BWN_IFSCTL) |
	    BWN_IFSCTL_USE_EDCF);
}

static void
bwn_spu_setdelay(struct bwn_mac *mac, int idle)
{
	struct bwn_softc *sc = mac->mac_sc;
	struct ieee80211com *ic = &sc->sc_ic;
	uint16_t delay;	/* microsec */

	delay = (mac->mac_phy.type == BWN_PHYTYPE_A) ? 3700 : 1050;
	if (ic->ic_opmode == IEEE80211_M_IBSS || idle)
		delay = 500;
	if ((mac->mac_phy.rf_ver == 0x2050) && (mac->mac_phy.rf_rev == 8))
		delay = max(delay, (uint16_t)2400);

	bwn_shm_write_2(mac, BWN_SHARED, BWN_SHARED_SPU_WAKEUP, delay);
}

static void
bwn_bt_enable(struct bwn_mac *mac)
{
	struct bwn_softc *sc = mac->mac_sc;
	uint64_t hf;

	if (bwn_bluetooth == 0)
		return;
	if ((siba_sprom_get_bf_lo(sc->sc_dev) & BWN_BFL_BTCOEXIST) == 0)
		return;
	if (mac->mac_phy.type != BWN_PHYTYPE_B && !mac->mac_phy.gmode)
		return;

	hf = bwn_hf_read(mac);
	if (siba_sprom_get_bf_lo(sc->sc_dev) & BWN_BFL_BTCMOD)
		hf |= BWN_HF_BT_COEXISTALT;
	else
		hf |= BWN_HF_BT_COEXIST;
	bwn_hf_write(mac, hf);
}

static void
bwn_set_macaddr(struct bwn_mac *mac)
{

	bwn_mac_write_bssid(mac);
	bwn_mac_setfilter(mac, BWN_MACFILTER_SELF,
	    mac->mac_sc->sc_ic.ic_macaddr);
}

static void
bwn_clear_keys(struct bwn_mac *mac)
{
	int i;

	for (i = 0; i < mac->mac_max_nr_keys; i++) {
		KASSERT(i >= 0 && i < mac->mac_max_nr_keys,
		    ("%s:%d: fail", __func__, __LINE__));

		bwn_key_dowrite(mac, i, BWN_SEC_ALGO_NONE,
		    NULL, BWN_SEC_KEYSIZE, NULL);
		if ((i <= 3) && !BWN_SEC_NEWAPI(mac)) {
			bwn_key_dowrite(mac, i + 4, BWN_SEC_ALGO_NONE,
			    NULL, BWN_SEC_KEYSIZE, NULL);
		}
		mac->mac_key[i].keyconf = NULL;
	}
}

static void
bwn_crypt_init(struct bwn_mac *mac)
{
	struct bwn_softc *sc = mac->mac_sc;

	mac->mac_max_nr_keys = (siba_get_revid(sc->sc_dev) >= 5) ? 58 : 20;
	KASSERT(mac->mac_max_nr_keys <= N(mac->mac_key),
	    ("%s:%d: fail", __func__, __LINE__));
	mac->mac_ktp = bwn_shm_read_2(mac, BWN_SHARED, BWN_SHARED_KEY_TABLEP);
	mac->mac_ktp *= 2;
	if (siba_get_revid(sc->sc_dev) >= 5)
		BWN_WRITE_2(mac, BWN_RCMTA_COUNT, mac->mac_max_nr_keys - 8);
	bwn_clear_keys(mac);
}

static void
bwn_chip_exit(struct bwn_mac *mac)
{
	struct bwn_softc *sc = mac->mac_sc;

	bwn_phy_exit(mac);
	siba_gpio_set(sc->sc_dev, 0);
}

static int
bwn_fw_fillinfo(struct bwn_mac *mac)
{
	int error;

	error = bwn_fw_gets(mac, BWN_FWTYPE_DEFAULT);
	if (error == 0)
		return (0);
	error = bwn_fw_gets(mac, BWN_FWTYPE_OPENSOURCE);
	if (error == 0)
		return (0);
	return (error);
}

static int
bwn_gpio_init(struct bwn_mac *mac)
{
	struct bwn_softc *sc = mac->mac_sc;
	uint32_t mask = 0x1f, set = 0xf, value;

	BWN_WRITE_4(mac, BWN_MACCTL,
	    BWN_READ_4(mac, BWN_MACCTL) & ~BWN_MACCTL_GPOUT_MASK);
	BWN_WRITE_2(mac, BWN_GPIO_MASK,
	    BWN_READ_2(mac, BWN_GPIO_MASK) | 0x000f);

	if (siba_get_chipid(sc->sc_dev) == 0x4301) {
		mask |= 0x0060;
		set |= 0x0060;
	}
	if (siba_sprom_get_bf_lo(sc->sc_dev) & BWN_BFL_PACTRL) {
		BWN_WRITE_2(mac, BWN_GPIO_MASK,
		    BWN_READ_2(mac, BWN_GPIO_MASK) | 0x0200);
		mask |= 0x0200;
		set |= 0x0200;
	}
	if (siba_get_revid(sc->sc_dev) >= 2)
		mask |= 0x0010;

	value = siba_gpio_get(sc->sc_dev);
	if (value == -1)
		return (0);
	siba_gpio_set(sc->sc_dev, (value & mask) | set);

	return (0);
}

static int
bwn_fw_loadinitvals(struct bwn_mac *mac)
{
#define	GETFWOFFSET(fwp, offset)				\
	((const struct bwn_fwinitvals *)((const char *)fwp.fw->data + offset))
	const size_t hdr_len = sizeof(struct bwn_fwhdr);
	const struct bwn_fwhdr *hdr;
	struct bwn_fw *fw = &mac->mac_fw;
	int error;

	hdr = (const struct bwn_fwhdr *)(fw->initvals.fw->data);
	error = bwn_fwinitvals_write(mac, GETFWOFFSET(fw->initvals, hdr_len),
	    be32toh(hdr->size), fw->initvals.fw->datasize - hdr_len);
	if (error)
		return (error);
	if (fw->initvals_band.fw) {
		hdr = (const struct bwn_fwhdr *)(fw->initvals_band.fw->data);
		error = bwn_fwinitvals_write(mac,
		    GETFWOFFSET(fw->initvals_band, hdr_len),
		    be32toh(hdr->size),
		    fw->initvals_band.fw->datasize - hdr_len);
	}
	return (error);
#undef GETFWOFFSET
}

static int
bwn_phy_init(struct bwn_mac *mac)
{
	struct bwn_softc *sc = mac->mac_sc;
	int error;

	mac->mac_phy.chan = mac->mac_phy.get_default_chan(mac);
	mac->mac_phy.rf_onoff(mac, 1);
	error = mac->mac_phy.init(mac);
	if (error) {
		device_printf(sc->sc_dev, "PHY init failed\n");
		goto fail0;
	}
	error = bwn_switch_channel(mac,
	    mac->mac_phy.get_default_chan(mac));
	if (error) {
		device_printf(sc->sc_dev,
		    "failed to switch default channel\n");
		goto fail1;
	}
	return (0);
fail1:
	if (mac->mac_phy.exit)
		mac->mac_phy.exit(mac);
fail0:
	mac->mac_phy.rf_onoff(mac, 0);

	return (error);
}

static void
bwn_set_txantenna(struct bwn_mac *mac, int antenna)
{
	uint16_t ant;
	uint16_t tmp;

	ant = bwn_ant2phy(antenna);

	/* For ACK/CTS */
	tmp = bwn_shm_read_2(mac, BWN_SHARED, BWN_SHARED_ACKCTS_PHYCTL);
	tmp = (tmp & ~BWN_TX_PHY_ANT) | ant;
	bwn_shm_write_2(mac, BWN_SHARED, BWN_SHARED_ACKCTS_PHYCTL, tmp);
	/* For Probe Resposes */
	tmp = bwn_shm_read_2(mac, BWN_SHARED, BWN_SHARED_PROBE_RESP_PHYCTL);
	tmp = (tmp & ~BWN_TX_PHY_ANT) | ant;
	bwn_shm_write_2(mac, BWN_SHARED, BWN_SHARED_PROBE_RESP_PHYCTL, tmp);
}

static void
bwn_set_opmode(struct bwn_mac *mac)
{
	struct bwn_softc *sc = mac->mac_sc;
	struct ieee80211com *ic = &sc->sc_ic;
	uint32_t ctl;
	uint16_t cfp_pretbtt;

	ctl = BWN_READ_4(mac, BWN_MACCTL);
	ctl &= ~(BWN_MACCTL_HOSTAP | BWN_MACCTL_PASS_CTL |
	    BWN_MACCTL_PASS_BADPLCP | BWN_MACCTL_PASS_BADFCS |
	    BWN_MACCTL_PROMISC | BWN_MACCTL_BEACON_PROMISC);
	ctl |= BWN_MACCTL_STA;

	if (ic->ic_opmode == IEEE80211_M_HOSTAP ||
	    ic->ic_opmode == IEEE80211_M_MBSS)
		ctl |= BWN_MACCTL_HOSTAP;
	else if (ic->ic_opmode == IEEE80211_M_IBSS)
		ctl &= ~BWN_MACCTL_STA;
	ctl |= sc->sc_filters;

	if (siba_get_revid(sc->sc_dev) <= 4)
		ctl |= BWN_MACCTL_PROMISC;

	BWN_WRITE_4(mac, BWN_MACCTL, ctl);

	cfp_pretbtt = 2;
	if ((ctl & BWN_MACCTL_STA) && !(ctl & BWN_MACCTL_HOSTAP)) {
		if (siba_get_chipid(sc->sc_dev) == 0x4306 &&
		    siba_get_chiprev(sc->sc_dev) == 3)
			cfp_pretbtt = 100;
		else
			cfp_pretbtt = 50;
	}
	BWN_WRITE_2(mac, 0x612, cfp_pretbtt);
}

static int
bwn_dma_gettype(struct bwn_mac *mac)
{
	uint32_t tmp;
	uint16_t base;

	tmp = BWN_READ_4(mac, SIBA_TGSHIGH);
	if (tmp & SIBA_TGSHIGH_DMA64)
		return (BWN_DMA_64BIT);
	base = bwn_dma_base(0, 0);
	BWN_WRITE_4(mac, base + BWN_DMA32_TXCTL, BWN_DMA32_TXADDREXT_MASK);
	tmp = BWN_READ_4(mac, base + BWN_DMA32_TXCTL);
	if (tmp & BWN_DMA32_TXADDREXT_MASK)
		return (BWN_DMA_32BIT);

	return (BWN_DMA_30BIT);
}

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

void
bwn_dummy_transmission(struct bwn_mac *mac, int ofdm, int paon)
{
	struct bwn_phy *phy = &mac->mac_phy;
	struct bwn_softc *sc = mac->mac_sc;
	unsigned int i, max_loop;
	uint16_t value;
	uint32_t buffer[5] = {
		0x00000000, 0x00d40000, 0x00000000, 0x01000000, 0x00000000
	};

	if (ofdm) {
		max_loop = 0x1e;
		buffer[0] = 0x000201cc;
	} else {
		max_loop = 0xfa;
		buffer[0] = 0x000b846e;
	}

	BWN_ASSERT_LOCKED(mac->mac_sc);

	for (i = 0; i < 5; i++)
		bwn_ram_write(mac, i * 4, buffer[i]);

	BWN_WRITE_2(mac, 0x0568, 0x0000);
	BWN_WRITE_2(mac, 0x07c0,
	    (siba_get_revid(sc->sc_dev) < 11) ? 0x0000 : 0x0100);

	value = (ofdm ? 0x41 : 0x40);
	BWN_WRITE_2(mac, 0x050c, value);

	if (phy->type == BWN_PHYTYPE_N || phy->type == BWN_PHYTYPE_LP ||
	    phy->type == BWN_PHYTYPE_LCN)
		BWN_WRITE_2(mac, 0x0514, 0x1a02);
	BWN_WRITE_2(mac, 0x0508, 0x0000);
	BWN_WRITE_2(mac, 0x050a, 0x0000);
	BWN_WRITE_2(mac, 0x054c, 0x0000);
	BWN_WRITE_2(mac, 0x056a, 0x0014);
	BWN_WRITE_2(mac, 0x0568, 0x0826);
	BWN_WRITE_2(mac, 0x0500, 0x0000);

	/* XXX TODO: n phy pa override? */

	switch (phy->type) {
	case BWN_PHYTYPE_N:
	case BWN_PHYTYPE_LCN:
		BWN_WRITE_2(mac, 0x0502, 0x00d0);
		break;
	case BWN_PHYTYPE_LP:
		BWN_WRITE_2(mac, 0x0502, 0x0050);
		break;
	default:
		BWN_WRITE_2(mac, 0x0502, 0x0030);
		break;
	}

	/* flush */
	BWN_READ_2(mac, 0x0502);

	if (phy->rf_ver == 0x2050 && phy->rf_rev <= 0x5)
		BWN_RF_WRITE(mac, 0x0051, 0x0017);
	for (i = 0x00; i < max_loop; i++) {
		value = BWN_READ_2(mac, 0x050e);
		if (value & 0x0080)
			break;
		DELAY(10);
	}
	for (i = 0x00; i < 0x0a; i++) {
		value = BWN_READ_2(mac, 0x050e);
		if (value & 0x0400)
			break;
		DELAY(10);
	}
	for (i = 0x00; i < 0x19; i++) {
		value = BWN_READ_2(mac, 0x0690);
		if (!(value & 0x0100))
			break;
		DELAY(10);
	}
	if (phy->rf_ver == 0x2050 && phy->rf_rev <= 0x5)
		BWN_RF_WRITE(mac, 0x0051, 0x0037);
}

void
bwn_ram_write(struct bwn_mac *mac, uint16_t offset, uint32_t val)
{
	uint32_t macctl;

	KASSERT(offset % 4 == 0, ("%s:%d: fail", __func__, __LINE__));

	macctl = BWN_READ_4(mac, BWN_MACCTL);
	if (macctl & BWN_MACCTL_BIGENDIAN)
		printf("TODO: need swap\n");

	BWN_WRITE_4(mac, BWN_RAM_CONTROL, offset);
	BWN_BARRIER(mac, BUS_SPACE_BARRIER_WRITE);
	BWN_WRITE_4(mac, BWN_RAM_DATA, val);
}

void
bwn_mac_suspend(struct bwn_mac *mac)
{
	struct bwn_softc *sc = mac->mac_sc;
	int i;
	uint32_t tmp;

	KASSERT(mac->mac_suspended >= 0,
	    ("%s:%d: fail", __func__, __LINE__));

	if (mac->mac_suspended == 0) {
		bwn_psctl(mac, BWN_PS_AWAKE);
		BWN_WRITE_4(mac, BWN_MACCTL,
			    BWN_READ_4(mac, BWN_MACCTL)
			    & ~BWN_MACCTL_ON);
		BWN_READ_4(mac, BWN_MACCTL);
		for (i = 35; i; i--) {
			tmp = BWN_READ_4(mac, BWN_INTR_REASON);
			if (tmp & BWN_INTR_MAC_SUSPENDED)
				goto out;
			DELAY(10);
		}
		for (i = 40; i; i--) {
			tmp = BWN_READ_4(mac, BWN_INTR_REASON);
			if (tmp & BWN_INTR_MAC_SUSPENDED)
				goto out;
			DELAY(1000);
		}
		device_printf(sc->sc_dev, "MAC suspend failed\n");
	}
out:
	mac->mac_suspended++;
}

void
bwn_mac_enable(struct bwn_mac *mac)
{
	struct bwn_softc *sc = mac->mac_sc;
	uint16_t state;

	state = bwn_shm_read_2(mac, BWN_SHARED,
	    BWN_SHARED_UCODESTAT);
	if (state != BWN_SHARED_UCODESTAT_SUSPEND &&
	    state != BWN_SHARED_UCODESTAT_SLEEP)
		device_printf(sc->sc_dev, "warn: firmware state (%d)\n", state);

	mac->mac_suspended--;
	KASSERT(mac->mac_suspended >= 0,
	    ("%s:%d: fail", __func__, __LINE__));
	if (mac->mac_suspended == 0) {
		BWN_WRITE_4(mac, BWN_MACCTL,
		    BWN_READ_4(mac, BWN_MACCTL) | BWN_MACCTL_ON);
		BWN_WRITE_4(mac, BWN_INTR_REASON, BWN_INTR_MAC_SUSPENDED);
		BWN_READ_4(mac, BWN_MACCTL);
		BWN_READ_4(mac, BWN_INTR_REASON);
		bwn_psctl(mac, 0);
	}
}

void
bwn_psctl(struct bwn_mac *mac, uint32_t flags)
{
	struct bwn_softc *sc = mac->mac_sc;
	int i;
	uint16_t ucstat;

	KASSERT(!((flags & BWN_PS_ON) && (flags & BWN_PS_OFF)),
	    ("%s:%d: fail", __func__, __LINE__));
	KASSERT(!((flags & BWN_PS_AWAKE) && (flags & BWN_PS_ASLEEP)),
	    ("%s:%d: fail", __func__, __LINE__));

	/* XXX forcibly awake and hwps-off */

	BWN_WRITE_4(mac, BWN_MACCTL,
	    (BWN_READ_4(mac, BWN_MACCTL) | BWN_MACCTL_AWAKE) &
	    ~BWN_MACCTL_HWPS);
	BWN_READ_4(mac, BWN_MACCTL);
	if (siba_get_revid(sc->sc_dev) >= 5) {
		for (i = 0; i < 100; i++) {
			ucstat = bwn_shm_read_2(mac, BWN_SHARED,
			    BWN_SHARED_UCODESTAT);
			if (ucstat != BWN_SHARED_UCODESTAT_SLEEP)
				break;
			DELAY(10);
		}
	}
}

static int
bwn_fw_gets(struct bwn_mac *mac, enum bwn_fwtype type)
{
	struct bwn_softc *sc = mac->mac_sc;
	struct bwn_fw *fw = &mac->mac_fw;
	const uint8_t rev = siba_get_revid(sc->sc_dev);
	const char *filename;
	uint32_t high;
	int error;

	/* microcode */
	filename = NULL;
	switch (rev) {
	case 42:
		if (mac->mac_phy.type == BWN_PHYTYPE_AC)
			filename = "ucode42";
		break;
	case 40:
		if (mac->mac_phy.type == BWN_PHYTYPE_AC)
			filename = "ucode40";
		break;
	case 33:
		if (mac->mac_phy.type == BWN_PHYTYPE_LCN40)
			filename = "ucode33_lcn40";
		break;
	case 30:
		if (mac->mac_phy.type == BWN_PHYTYPE_N)
			filename = "ucode30_mimo";
		break;
	case 29:
		if (mac->mac_phy.type == BWN_PHYTYPE_HT)
			filename = "ucode29_mimo";
		break;
	case 26:
		if (mac->mac_phy.type == BWN_PHYTYPE_HT)
			filename = "ucode26_mimo";
		break;
	case 28:
	case 25:
		if (mac->mac_phy.type == BWN_PHYTYPE_N)
			filename = "ucode25_mimo";
		else if (mac->mac_phy.type == BWN_PHYTYPE_LCN)
			filename = "ucode25_lcn";
		break;
	case 24:
		if (mac->mac_phy.type == BWN_PHYTYPE_LCN)
			filename = "ucode24_lcn";
		break;
	case 23:
		if (mac->mac_phy.type == BWN_PHYTYPE_N)
			filename = "ucode16_mimo";
		break;
	case 16:
	case 17:
	case 18:
	case 19:
		if (mac->mac_phy.type == BWN_PHYTYPE_N)
			filename = "ucode16_mimo";
		else if (mac->mac_phy.type == BWN_PHYTYPE_LP)
			filename = "ucode16_lp";
		break;
	case 15:
		filename = "ucode15";
		break;
	case 14:
		filename = "ucode14";
		break;
	case 13:
		filename = "ucode13";
		break;
	case 12:
	case 11:
		filename = "ucode11";
		break;
	case 10:
	case 9:
	case 8:
	case 7:
	case 6:
	case 5:
		filename = "ucode5";
		break;
	default:
		device_printf(sc->sc_dev, "no ucode for rev %d\n", rev);
		bwn_release_firmware(mac);
		return (EOPNOTSUPP);
	}

	device_printf(sc->sc_dev, "ucode fw: %s\n", filename);
	error = bwn_fw_get(mac, type, filename, &fw->ucode);
	if (error) {
		bwn_release_firmware(mac);
		return (error);
	}

	/* PCM */
	KASSERT(fw->no_pcmfile == 0, ("%s:%d fail", __func__, __LINE__));
	if (rev >= 5 && rev <= 10) {
		error = bwn_fw_get(mac, type, "pcm5", &fw->pcm);
		if (error == ENOENT)
			fw->no_pcmfile = 1;
		else if (error) {
			bwn_release_firmware(mac);
			return (error);
		}
	} else if (rev < 11) {
		device_printf(sc->sc_dev, "no PCM for rev %d\n", rev);
		return (EOPNOTSUPP);
	}

	/* initvals */
	high = siba_read_4(sc->sc_dev, SIBA_TGSHIGH);
	switch (mac->mac_phy.type) {
	case BWN_PHYTYPE_A:
		if (rev < 5 || rev > 10)
			goto fail1;
		if (high & BWN_TGSHIGH_HAVE_2GHZ)
			filename = "a0g1initvals5";
		else
			filename = "a0g0initvals5";
		break;
	case BWN_PHYTYPE_G:
		if (rev >= 5 && rev <= 10)
			filename = "b0g0initvals5";
		else if (rev >= 13)
			filename = "b0g0initvals13";
		else
			goto fail1;
		break;
	case BWN_PHYTYPE_LP:
		if (rev == 13)
			filename = "lp0initvals13";
		else if (rev == 14)
			filename = "lp0initvals14";
		else if (rev >= 15)
			filename = "lp0initvals15";
		else
			goto fail1;
		break;
	case BWN_PHYTYPE_N:
		if (rev == 30)
			filename = "n16initvals30";
		else if (rev == 28 || rev == 25)
			filename = "n0initvals25";
		else if (rev == 24)
			filename = "n0initvals24";
		else if (rev == 23)
			filename = "n0initvals16";
		else if (rev >= 16 && rev <= 18)
			filename = "n0initvals16";
		else if (rev >= 11 && rev <= 12)
			filename = "n0initvals11";
		else
			goto fail1;
		break;
	default:
		goto fail1;
	}
	error = bwn_fw_get(mac, type, filename, &fw->initvals);
	if (error) {
		bwn_release_firmware(mac);
		return (error);
	}

	/* bandswitch initvals */
	switch (mac->mac_phy.type) {
	case BWN_PHYTYPE_A:
		if (rev >= 5 && rev <= 10) {
			if (high & BWN_TGSHIGH_HAVE_2GHZ)
				filename = "a0g1bsinitvals5";
			else
				filename = "a0g0bsinitvals5";
		} else if (rev >= 11)
			filename = NULL;
		else
			goto fail1;
		break;
	case BWN_PHYTYPE_G:
		if (rev >= 5 && rev <= 10)
			filename = "b0g0bsinitvals5";
		else if (rev >= 11)
			filename = NULL;
		else
			goto fail1;
		break;
	case BWN_PHYTYPE_LP:
		if (rev == 13)
			filename = "lp0bsinitvals13";
		else if (rev == 14)
			filename = "lp0bsinitvals14";
		else if (rev >= 15)
			filename = "lp0bsinitvals15";
		else
			goto fail1;
		break;
	case BWN_PHYTYPE_N:
		if (rev == 30)
			filename = "n16bsinitvals30";
		else if (rev == 28 || rev == 25)
			filename = "n0bsinitvals25";
		else if (rev == 24)
			filename = "n0bsinitvals24";
		else if (rev == 23)
			filename = "n0bsinitvals16";
		else if (rev >= 16 && rev <= 18)
			filename = "n0bsinitvals16";
		else if (rev >= 11 && rev <= 12)
			filename = "n0bsinitvals11";
		else
			goto fail1;
		break;
	default:
		device_printf(sc->sc_dev, "unknown phy (%d)\n",
		    mac->mac_phy.type);
		goto fail1;
	}
	error = bwn_fw_get(mac, type, filename, &fw->initvals_band);
	if (error) {
		bwn_release_firmware(mac);
		return (error);
	}
	return (0);
fail1:
	device_printf(sc->sc_dev, "no INITVALS for rev %d, phy.type %d\n",
	    rev, mac->mac_phy.type);
	bwn_release_firmware(mac);
	return (EOPNOTSUPP);
}

static int
bwn_fw_get(struct bwn_mac *mac, enum bwn_fwtype type,
    const char *name, struct bwn_fwfile *bfw)
{
	const struct bwn_fwhdr *hdr;
	struct bwn_softc *sc = mac->mac_sc;
	const struct firmware *fw;
	char namebuf[64];

	if (name == NULL) {
		bwn_do_release_fw(bfw);
		return (0);
	}
	if (bfw->filename != NULL) {
		if (bfw->type == type && (strcmp(bfw->filename, name) == 0))
			return (0);
		bwn_do_release_fw(bfw);
	}

	snprintf(namebuf, sizeof(namebuf), "bwn%s_v4_%s%s",
	    (type == BWN_FWTYPE_OPENSOURCE) ? "-open" : "",
	    (mac->mac_phy.type == BWN_PHYTYPE_LP) ? "lp_" : "", name);
	/* XXX Sleeping on "fwload" with the non-sleepable locks held */
	fw = firmware_get(namebuf);
	if (fw == NULL) {
		device_printf(sc->sc_dev, "the fw file(%s) not found\n",
		    namebuf);
		return (ENOENT);
	}
	if (fw->datasize < sizeof(struct bwn_fwhdr))
		goto fail;
	hdr = (const struct bwn_fwhdr *)(fw->data);
	switch (hdr->type) {
	case BWN_FWTYPE_UCODE:
	case BWN_FWTYPE_PCM:
		if (be32toh(hdr->size) !=
		    (fw->datasize - sizeof(struct bwn_fwhdr)))
			goto fail;
		/* FALLTHROUGH */
	case BWN_FWTYPE_IV:
		if (hdr->ver != 1)
			goto fail;
		break;
	default:
		goto fail;
	}
	bfw->filename = name;
	bfw->fw = fw;
	bfw->type = type;
	return (0);
fail:
	device_printf(sc->sc_dev, "the fw file(%s) format error\n", namebuf);
	if (fw != NULL)
		firmware_put(fw, FIRMWARE_UNLOAD);
	return (EPROTO);
}

static void
bwn_release_firmware(struct bwn_mac *mac)
{

	bwn_do_release_fw(&mac->mac_fw.ucode);
	bwn_do_release_fw(&mac->mac_fw.pcm);
	bwn_do_release_fw(&mac->mac_fw.initvals);
	bwn_do_release_fw(&mac->mac_fw.initvals_band);
}

static void
bwn_do_release_fw(struct bwn_fwfile *bfw)
{

	if (bfw->fw != NULL)
		firmware_put(bfw->fw, FIRMWARE_UNLOAD);
	bfw->fw = NULL;
	bfw->filename = NULL;
}

static int
bwn_fw_loaducode(struct bwn_mac *mac)
{
#define	GETFWOFFSET(fwp, offset)	\
	((const uint32_t *)((const char *)fwp.fw->data + offset))
#define	GETFWSIZE(fwp, offset)	\
	((fwp.fw->datasize - offset) / sizeof(uint32_t))
	struct bwn_softc *sc = mac->mac_sc;
	const uint32_t *data;
	unsigned int i;
	uint32_t ctl;
	uint16_t date, fwcaps, time;
	int error = 0;

	ctl = BWN_READ_4(mac, BWN_MACCTL);
	ctl |= BWN_MACCTL_MCODE_JMP0;
	KASSERT(!(ctl & BWN_MACCTL_MCODE_RUN), ("%s:%d: fail", __func__,
	    __LINE__));
	BWN_WRITE_4(mac, BWN_MACCTL, ctl);
	for (i = 0; i < 64; i++)
		bwn_shm_write_2(mac, BWN_SCRATCH, i, 0);
	for (i = 0; i < 4096; i += 2)
		bwn_shm_write_2(mac, BWN_SHARED, i, 0);

	data = GETFWOFFSET(mac->mac_fw.ucode, sizeof(struct bwn_fwhdr));
	bwn_shm_ctlword(mac, BWN_UCODE | BWN_SHARED_AUTOINC, 0x0000);
	for (i = 0; i < GETFWSIZE(mac->mac_fw.ucode, sizeof(struct bwn_fwhdr));
	     i++) {
		BWN_WRITE_4(mac, BWN_SHM_DATA, be32toh(data[i]));
		DELAY(10);
	}

	if (mac->mac_fw.pcm.fw) {
		data = GETFWOFFSET(mac->mac_fw.pcm, sizeof(struct bwn_fwhdr));
		bwn_shm_ctlword(mac, BWN_HW, 0x01ea);
		BWN_WRITE_4(mac, BWN_SHM_DATA, 0x00004000);
		bwn_shm_ctlword(mac, BWN_HW, 0x01eb);
		for (i = 0; i < GETFWSIZE(mac->mac_fw.pcm,
		    sizeof(struct bwn_fwhdr)); i++) {
			BWN_WRITE_4(mac, BWN_SHM_DATA, be32toh(data[i]));
			DELAY(10);
		}
	}

	BWN_WRITE_4(mac, BWN_INTR_REASON, BWN_INTR_ALL);
	BWN_WRITE_4(mac, BWN_MACCTL,
	    (BWN_READ_4(mac, BWN_MACCTL) & ~BWN_MACCTL_MCODE_JMP0) |
	    BWN_MACCTL_MCODE_RUN);

	for (i = 0; i < 21; i++) {
		if (BWN_READ_4(mac, BWN_INTR_REASON) == BWN_INTR_MAC_SUSPENDED)
			break;
		if (i >= 20) {
			device_printf(sc->sc_dev, "ucode timeout\n");
			error = ENXIO;
			goto error;
		}
		DELAY(50000);
	}
	BWN_READ_4(mac, BWN_INTR_REASON);

	mac->mac_fw.rev = bwn_shm_read_2(mac, BWN_SHARED, BWN_SHARED_UCODE_REV);
	if (mac->mac_fw.rev <= 0x128) {
		device_printf(sc->sc_dev, "the firmware is too old\n");
		error = EOPNOTSUPP;
		goto error;
	}

	/*
	 * Determine firmware header version; needed for TX/RX packet
	 * handling.
	 */
	if (mac->mac_fw.rev >= 598)
		mac->mac_fw.fw_hdr_format = BWN_FW_HDR_598;
	else if (mac->mac_fw.rev >= 410)
		mac->mac_fw.fw_hdr_format = BWN_FW_HDR_410;
	else
		mac->mac_fw.fw_hdr_format = BWN_FW_HDR_351;

	/*
	 * We don't support rev 598 or later; that requires
	 * another round of changes to the TX/RX descriptor
	 * and status layout.
	 *
	 * So, complain this is the case and exit out, rather
	 * than attaching and then failing.
	 */
	if (mac->mac_fw.fw_hdr_format == BWN_FW_HDR_598) {
		device_printf(sc->sc_dev,
		    "firmware is too new (>=598); not supported\n");
		error = EOPNOTSUPP;
		goto error;
	}

	mac->mac_fw.patch = bwn_shm_read_2(mac, BWN_SHARED,
	    BWN_SHARED_UCODE_PATCH);
	date = bwn_shm_read_2(mac, BWN_SHARED, BWN_SHARED_UCODE_DATE);
	mac->mac_fw.opensource = (date == 0xffff);
	if (bwn_wme != 0)
		mac->mac_flags |= BWN_MAC_FLAG_WME;
	mac->mac_flags |= BWN_MAC_FLAG_HWCRYPTO;

	time = bwn_shm_read_2(mac, BWN_SHARED, BWN_SHARED_UCODE_TIME);
	if (mac->mac_fw.opensource == 0) {
		device_printf(sc->sc_dev,
		    "firmware version (rev %u patch %u date %#x time %#x)\n",
		    mac->mac_fw.rev, mac->mac_fw.patch, date, time);
		if (mac->mac_fw.no_pcmfile)
			device_printf(sc->sc_dev,
			    "no HW crypto acceleration due to pcm5\n");
	} else {
		mac->mac_fw.patch = time;
		fwcaps = bwn_fwcaps_read(mac);
		if (!(fwcaps & BWN_FWCAPS_HWCRYPTO) || mac->mac_fw.no_pcmfile) {
			device_printf(sc->sc_dev,
			    "disabling HW crypto acceleration\n");
			mac->mac_flags &= ~BWN_MAC_FLAG_HWCRYPTO;
		}
		if (!(fwcaps & BWN_FWCAPS_WME)) {
			device_printf(sc->sc_dev, "disabling WME support\n");
			mac->mac_flags &= ~BWN_MAC_FLAG_WME;
		}
	}

	if (BWN_ISOLDFMT(mac))
		device_printf(sc->sc_dev, "using old firmware image\n");

	return (0);

error:
	BWN_WRITE_4(mac, BWN_MACCTL,
	    (BWN_READ_4(mac, BWN_MACCTL) & ~BWN_MACCTL_MCODE_RUN) |
	    BWN_MACCTL_MCODE_JMP0);

	return (error);
#undef GETFWSIZE
#undef GETFWOFFSET
}

/* OpenFirmware only */
static uint16_t
bwn_fwcaps_read(struct bwn_mac *mac)
{

	KASSERT(mac->mac_fw.opensource == 1,
	    ("%s:%d: fail", __func__, __LINE__));
	return (bwn_shm_read_2(mac, BWN_SHARED, BWN_SHARED_FWCAPS));
}

static int
bwn_fwinitvals_write(struct bwn_mac *mac, const struct bwn_fwinitvals *ivals,
    size_t count, size_t array_size)
{
#define	GET_NEXTIV16(iv)						\
	((const struct bwn_fwinitvals *)((const uint8_t *)(iv) +	\
	    sizeof(uint16_t) + sizeof(uint16_t)))
#define	GET_NEXTIV32(iv)						\
	((const struct bwn_fwinitvals *)((const uint8_t *)(iv) +	\
	    sizeof(uint16_t) + sizeof(uint32_t)))
	struct bwn_softc *sc = mac->mac_sc;
	const struct bwn_fwinitvals *iv;
	uint16_t offset;
	size_t i;
	uint8_t bit32;

	KASSERT(sizeof(struct bwn_fwinitvals) == 6,
	    ("%s:%d: fail", __func__, __LINE__));
	iv = ivals;
	for (i = 0; i < count; i++) {
		if (array_size < sizeof(iv->offset_size))
			goto fail;
		array_size -= sizeof(iv->offset_size);
		offset = be16toh(iv->offset_size);
		bit32 = (offset & BWN_FWINITVALS_32BIT) ? 1 : 0;
		offset &= BWN_FWINITVALS_OFFSET_MASK;
		if (offset >= 0x1000)
			goto fail;
		if (bit32) {
			if (array_size < sizeof(iv->data.d32))
				goto fail;
			array_size -= sizeof(iv->data.d32);
			BWN_WRITE_4(mac, offset, be32toh(iv->data.d32));
			iv = GET_NEXTIV32(iv);
		} else {

			if (array_size < sizeof(iv->data.d16))
				goto fail;
			array_size -= sizeof(iv->data.d16);
			BWN_WRITE_2(mac, offset, be16toh(iv->data.d16));

			iv = GET_NEXTIV16(iv);
		}
	}
	if (array_size != 0)
		goto fail;
	return (0);
fail:
	device_printf(sc->sc_dev, "initvals: invalid format\n");
	return (EPROTO);
#undef GET_NEXTIV16
#undef GET_NEXTIV32
}

int
bwn_switch_channel(struct bwn_mac *mac, int chan)
{
	struct bwn_phy *phy = &(mac->mac_phy);
	struct bwn_softc *sc = mac->mac_sc;
	struct ieee80211com *ic = &sc->sc_ic;
	uint16_t channelcookie, savedcookie;
	int error;

	if (chan == 0xffff)
		chan = phy->get_default_chan(mac);

	channelcookie = chan;
	if (IEEE80211_IS_CHAN_5GHZ(ic->ic_curchan))
		channelcookie |= 0x100;
	savedcookie = bwn_shm_read_2(mac, BWN_SHARED, BWN_SHARED_CHAN);
	bwn_shm_write_2(mac, BWN_SHARED, BWN_SHARED_CHAN, channelcookie);
	error = phy->switch_channel(mac, chan);
	if (error)
		goto fail;

	mac->mac_phy.chan = chan;
	DELAY(8000);
	return (0);
fail:
	device_printf(sc->sc_dev, "failed to switch channel\n");
	bwn_shm_write_2(mac, BWN_SHARED, BWN_SHARED_CHAN, savedcookie);
	return (error);
}

static uint16_t
bwn_ant2phy(int antenna)
{

	switch (antenna) {
	case BWN_ANT0:
		return (BWN_TX_PHY_ANT0);
	case BWN_ANT1:
		return (BWN_TX_PHY_ANT1);
	case BWN_ANT2:
		return (BWN_TX_PHY_ANT2);
	case BWN_ANT3:
		return (BWN_TX_PHY_ANT3);
	case BWN_ANTAUTO:
		return (BWN_TX_PHY_ANT01AUTO);
	}
	KASSERT(0 == 1, ("%s:%d: fail", __func__, __LINE__));
	return (0);
}

static void
bwn_wme_load(struct bwn_mac *mac)
{
	struct bwn_softc *sc = mac->mac_sc;
	int i;

	KASSERT(N(bwn_wme_shm_offsets) == N(sc->sc_wmeParams),
	    ("%s:%d: fail", __func__, __LINE__));

	bwn_mac_suspend(mac);
	for (i = 0; i < N(sc->sc_wmeParams); i++)
		bwn_wme_loadparams(mac, &(sc->sc_wmeParams[i]),
		    bwn_wme_shm_offsets[i]);
	bwn_mac_enable(mac);
}

static void
bwn_wme_loadparams(struct bwn_mac *mac,
    const struct wmeParams *p, uint16_t shm_offset)
{
#define	SM(_v, _f)      (((_v) << _f##_S) & _f)
	struct bwn_softc *sc = mac->mac_sc;
	uint16_t params[BWN_NR_WMEPARAMS];
	int slot, tmp;
	unsigned int i;

	slot = BWN_READ_2(mac, BWN_RNG) &
	    SM(p->wmep_logcwmin, WME_PARAM_LOGCWMIN);

	memset(&params, 0, sizeof(params));

	DPRINTF(sc, BWN_DEBUG_WME, "wmep_txopLimit %d wmep_logcwmin %d "
	    "wmep_logcwmax %d wmep_aifsn %d\n", p->wmep_txopLimit,
	    p->wmep_logcwmin, p->wmep_logcwmax, p->wmep_aifsn);

	params[BWN_WMEPARAM_TXOP] = p->wmep_txopLimit * 32;
	params[BWN_WMEPARAM_CWMIN] = SM(p->wmep_logcwmin, WME_PARAM_LOGCWMIN);
	params[BWN_WMEPARAM_CWMAX] = SM(p->wmep_logcwmax, WME_PARAM_LOGCWMAX);
	params[BWN_WMEPARAM_CWCUR] = SM(p->wmep_logcwmin, WME_PARAM_LOGCWMIN);
	params[BWN_WMEPARAM_AIFS] = p->wmep_aifsn;
	params[BWN_WMEPARAM_BSLOTS] = slot;
	params[BWN_WMEPARAM_REGGAP] = slot + p->wmep_aifsn;

	for (i = 0; i < N(params); i++) {
		if (i == BWN_WMEPARAM_STATUS) {
			tmp = bwn_shm_read_2(mac, BWN_SHARED,
			    shm_offset + (i * 2));
			tmp |= 0x100;
			bwn_shm_write_2(mac, BWN_SHARED, shm_offset + (i * 2),
			    tmp);
		} else {
			bwn_shm_write_2(mac, BWN_SHARED, shm_offset + (i * 2),
			    params[i]);
		}
	}
}

static void
bwn_mac_write_bssid(struct bwn_mac *mac)
{
	struct bwn_softc *sc = mac->mac_sc;
	uint32_t tmp;
	int i;
	uint8_t mac_bssid[IEEE80211_ADDR_LEN * 2];

	bwn_mac_setfilter(mac, BWN_MACFILTER_BSSID, sc->sc_bssid);
	memcpy(mac_bssid, sc->sc_ic.ic_macaddr, IEEE80211_ADDR_LEN);
	memcpy(mac_bssid + IEEE80211_ADDR_LEN, sc->sc_bssid,
	    IEEE80211_ADDR_LEN);

	for (i = 0; i < N(mac_bssid); i += sizeof(uint32_t)) {
		tmp = (uint32_t) (mac_bssid[i + 0]);
		tmp |= (uint32_t) (mac_bssid[i + 1]) << 8;
		tmp |= (uint32_t) (mac_bssid[i + 2]) << 16;
		tmp |= (uint32_t) (mac_bssid[i + 3]) << 24;
		bwn_ram_write(mac, 0x20 + i, tmp);
	}
}

static void
bwn_mac_setfilter(struct bwn_mac *mac, uint16_t offset,
    const uint8_t *macaddr)
{
	static const uint8_t zero[IEEE80211_ADDR_LEN] = { 0 };
	uint16_t data;

	if (!mac)
		macaddr = zero;

	offset |= 0x0020;
	BWN_WRITE_2(mac, BWN_MACFILTER_CONTROL, offset);

	data = macaddr[0];
	data |= macaddr[1] << 8;
	BWN_WRITE_2(mac, BWN_MACFILTER_DATA, data);
	data = macaddr[2];
	data |= macaddr[3] << 8;
	BWN_WRITE_2(mac, BWN_MACFILTER_DATA, data);
	data = macaddr[4];
	data |= macaddr[5] << 8;
	BWN_WRITE_2(mac, BWN_MACFILTER_DATA, data);
}

static void
bwn_key_dowrite(struct bwn_mac *mac, uint8_t index, uint8_t algorithm,
    const uint8_t *key, size_t key_len, const uint8_t *mac_addr)
{
	uint8_t buf[BWN_SEC_KEYSIZE] = { 0, };
	uint8_t per_sta_keys_start = 8;

	if (BWN_SEC_NEWAPI(mac))
		per_sta_keys_start = 4;

	KASSERT(index < mac->mac_max_nr_keys,
	    ("%s:%d: fail", __func__, __LINE__));
	KASSERT(key_len <= BWN_SEC_KEYSIZE,
	    ("%s:%d: fail", __func__, __LINE__));

	if (index >= per_sta_keys_start)
		bwn_key_macwrite(mac, index, NULL);
	if (key)
		memcpy(buf, key, key_len);
	bwn_key_write(mac, index, algorithm, buf);
	if (index >= per_sta_keys_start)
		bwn_key_macwrite(mac, index, mac_addr);

	mac->mac_key[index].algorithm = algorithm;
}

static void
bwn_key_macwrite(struct bwn_mac *mac, uint8_t index, const uint8_t *addr)
{
	struct bwn_softc *sc = mac->mac_sc;
	uint32_t addrtmp[2] = { 0, 0 };
	uint8_t start = 8;

	if (BWN_SEC_NEWAPI(mac))
		start = 4;

	KASSERT(index >= start,
	    ("%s:%d: fail", __func__, __LINE__));
	index -= start;

	if (addr) {
		addrtmp[0] = addr[0];
		addrtmp[0] |= ((uint32_t) (addr[1]) << 8);
		addrtmp[0] |= ((uint32_t) (addr[2]) << 16);
		addrtmp[0] |= ((uint32_t) (addr[3]) << 24);
		addrtmp[1] = addr[4];
		addrtmp[1] |= ((uint32_t) (addr[5]) << 8);
	}

	if (siba_get_revid(sc->sc_dev) >= 5) {
		bwn_shm_write_4(mac, BWN_RCMTA, (index * 2) + 0, addrtmp[0]);
		bwn_shm_write_2(mac, BWN_RCMTA, (index * 2) + 1, addrtmp[1]);
	} else {
		if (index >= 8) {
			bwn_shm_write_4(mac, BWN_SHARED,
			    BWN_SHARED_PSM + (index * 6) + 0, addrtmp[0]);
			bwn_shm_write_2(mac, BWN_SHARED,
			    BWN_SHARED_PSM + (index * 6) + 4, addrtmp[1]);
		}
	}
}

static void
bwn_key_write(struct bwn_mac *mac, uint8_t index, uint8_t algorithm,
    const uint8_t *key)
{
	unsigned int i;
	uint32_t offset;
	uint16_t kidx, value;

	kidx = BWN_SEC_KEY2FW(mac, index);
	bwn_shm_write_2(mac, BWN_SHARED,
	    BWN_SHARED_KEYIDX_BLOCK + (kidx * 2), (kidx << 4) | algorithm);

	offset = mac->mac_ktp + (index * BWN_SEC_KEYSIZE);
	for (i = 0; i < BWN_SEC_KEYSIZE; i += 2) {
		value = key[i];
		value |= (uint16_t)(key[i + 1]) << 8;
		bwn_shm_write_2(mac, BWN_SHARED, offset + i, value);
	}
}

static void
bwn_phy_exit(struct bwn_mac *mac)
{

	mac->mac_phy.rf_onoff(mac, 0);
	if (mac->mac_phy.exit != NULL)
		mac->mac_phy.exit(mac);
}

static void
bwn_dma_free(struct bwn_mac *mac)
{
	struct bwn_dma *dma;

	if ((mac->mac_flags & BWN_MAC_FLAG_DMA) == 0)
		return;
	dma = &mac->mac_method.dma;

	bwn_dma_ringfree(&dma->rx);
	bwn_dma_ringfree(&dma->wme[WME_AC_BK]);
	bwn_dma_ringfree(&dma->wme[WME_AC_BE]);
	bwn_dma_ringfree(&dma->wme[WME_AC_VI]);
	bwn_dma_ringfree(&dma->wme[WME_AC_VO]);
	bwn_dma_ringfree(&dma->mcast);
}

static void
bwn_core_stop(struct bwn_mac *mac)
{
	struct bwn_softc *sc = mac->mac_sc;

	BWN_ASSERT_LOCKED(sc);

	if (mac->mac_status < BWN_MAC_STATUS_STARTED)
		return;

	callout_stop(&sc->sc_rfswitch_ch);
	callout_stop(&sc->sc_task_ch);
	callout_stop(&sc->sc_watchdog_ch);
	sc->sc_watchdog_timer = 0;
	BWN_WRITE_4(mac, BWN_INTR_MASK, 0);
	BWN_READ_4(mac, BWN_INTR_MASK);
	bwn_mac_suspend(mac);

	mac->mac_status = BWN_MAC_STATUS_INITED;
}

static int
bwn_switch_band(struct bwn_softc *sc, struct ieee80211_channel *chan)
{
	struct bwn_mac *up_dev = NULL;
	struct bwn_mac *down_dev;
	struct bwn_mac *mac;
	int err, status;
	uint8_t gmode;

	BWN_ASSERT_LOCKED(sc);

	TAILQ_FOREACH(mac, &sc->sc_maclist, mac_list) {
		if (IEEE80211_IS_CHAN_2GHZ(chan) &&
		    mac->mac_phy.supports_2ghz) {
			up_dev = mac;
			gmode = 1;
		} else if (IEEE80211_IS_CHAN_5GHZ(chan) &&
		    mac->mac_phy.supports_5ghz) {
			up_dev = mac;
			gmode = 0;
		} else {
			KASSERT(0 == 1, ("%s:%d: fail", __func__, __LINE__));
			return (EINVAL);
		}
		if (up_dev != NULL)
			break;
	}
	if (up_dev == NULL) {
		device_printf(sc->sc_dev, "Could not find a device\n");
		return (ENODEV);
	}
	if (up_dev == sc->sc_curmac && sc->sc_curmac->mac_phy.gmode == gmode)
		return (0);

	DPRINTF(sc, BWN_DEBUG_RF | BWN_DEBUG_PHY | BWN_DEBUG_RESET,
	    "switching to %s-GHz band\n",
	    IEEE80211_IS_CHAN_2GHZ(chan) ? "2" : "5");

	down_dev = sc->sc_curmac;
	status = down_dev->mac_status;
	if (status >= BWN_MAC_STATUS_STARTED)
		bwn_core_stop(down_dev);
	if (status >= BWN_MAC_STATUS_INITED)
		bwn_core_exit(down_dev);

	if (down_dev != up_dev)
		bwn_phy_reset(down_dev);

	up_dev->mac_phy.gmode = gmode;
	if (status >= BWN_MAC_STATUS_INITED) {
		err = bwn_core_init(up_dev);
		if (err) {
			device_printf(sc->sc_dev,
			    "fatal: failed to initialize for %s-GHz\n",
			    IEEE80211_IS_CHAN_2GHZ(chan) ? "2" : "5");
			goto fail;
		}
	}
	if (status >= BWN_MAC_STATUS_STARTED)
		bwn_core_start(up_dev);
	KASSERT(up_dev->mac_status == status, ("%s: fail", __func__));
	sc->sc_curmac = up_dev;

	return (0);
fail:
	sc->sc_curmac = NULL;
	return (err);
}

static void
bwn_rf_turnon(struct bwn_mac *mac)
{

	DPRINTF(mac->mac_sc, BWN_DEBUG_RESET, "%s: called\n", __func__);

	bwn_mac_suspend(mac);
	mac->mac_phy.rf_onoff(mac, 1);
	mac->mac_phy.rf_on = 1;
	bwn_mac_enable(mac);
}

static void
bwn_rf_turnoff(struct bwn_mac *mac)
{

	DPRINTF(mac->mac_sc, BWN_DEBUG_RESET, "%s: called\n", __func__);

	bwn_mac_suspend(mac);
	mac->mac_phy.rf_onoff(mac, 0);
	mac->mac_phy.rf_on = 0;
	bwn_mac_enable(mac);
}

/*
 * SSB PHY reset.
 *
 * XXX TODO: BCMA PHY reset.
 */
static void
bwn_phy_reset(struct bwn_mac *mac)
{
	struct bwn_softc *sc = mac->mac_sc;

	siba_write_4(sc->sc_dev, SIBA_TGSLOW,
	    ((siba_read_4(sc->sc_dev, SIBA_TGSLOW) & ~BWN_TGSLOW_SUPPORT_G) |
	     BWN_TGSLOW_PHYRESET) | SIBA_TGSLOW_FGC);
	DELAY(1000);
	siba_write_4(sc->sc_dev, SIBA_TGSLOW,
	    (siba_read_4(sc->sc_dev, SIBA_TGSLOW) & ~SIBA_TGSLOW_FGC));
	DELAY(1000);
}

static int
bwn_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
{
	struct bwn_vap *bvp = BWN_VAP(vap);
	struct ieee80211com *ic= vap->iv_ic;
	enum ieee80211_state ostate = vap->iv_state;
	struct bwn_softc *sc = ic->ic_softc;
	struct bwn_mac *mac = sc->sc_curmac;
	int error;

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

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

	BWN_LOCK(sc);

	bwn_led_newstate(mac, nstate);

	/*
	 * Clear the BSSID when we stop a STA
	 */
	if (vap->iv_opmode == IEEE80211_M_STA) {
		if (ostate == IEEE80211_S_RUN && nstate != IEEE80211_S_RUN) {
			/*
			 * Clear out the BSSID.  If we reassociate to
			 * the same AP, this will reinialize things
			 * correctly...
			 */
			if (ic->ic_opmode == IEEE80211_M_STA &&
			    (sc->sc_flags & BWN_FLAG_INVALID) == 0) {
				memset(sc->sc_bssid, 0, IEEE80211_ADDR_LEN);
				bwn_set_macaddr(mac);
			}
		}
	}

	if (vap->iv_opmode == IEEE80211_M_MONITOR ||
	    vap->iv_opmode == IEEE80211_M_AHDEMO) {
		/* XXX nothing to do? */
	} else if (nstate == IEEE80211_S_RUN) {
		memcpy(sc->sc_bssid, vap->iv_bss->ni_bssid, IEEE80211_ADDR_LEN);
		bwn_set_opmode(mac);
		bwn_set_pretbtt(mac);
		bwn_spu_setdelay(mac, 0);
		bwn_set_macaddr(mac);
	}

	BWN_UNLOCK(sc);

	return (error);
}

static void
bwn_set_pretbtt(struct bwn_mac *mac)
{
	struct bwn_softc *sc = mac->mac_sc;
	struct ieee80211com *ic = &sc->sc_ic;
	uint16_t pretbtt;

	if (ic->ic_opmode == IEEE80211_M_IBSS)
		pretbtt = 2;
	else
		pretbtt = (mac->mac_phy.type == BWN_PHYTYPE_A) ? 120 : 250;
	bwn_shm_write_2(mac, BWN_SHARED, BWN_SHARED_PRETBTT, pretbtt);
	BWN_WRITE_2(mac, BWN_TSF_CFP_PRETBTT, pretbtt);
}

static int
bwn_intr(void *arg)
{
	struct bwn_mac *mac = arg;
	struct bwn_softc *sc = mac->mac_sc;
	uint32_t reason;

	if (mac->mac_status < BWN_MAC_STATUS_STARTED ||
	    (sc->sc_flags & BWN_FLAG_INVALID))
		return (FILTER_STRAY);

	reason = BWN_READ_4(mac, BWN_INTR_REASON);
	if (reason == 0xffffffff)	/* shared IRQ */
		return (FILTER_STRAY);
	reason &= mac->mac_intr_mask;
	if (reason == 0)
		return (FILTER_HANDLED);

	mac->mac_reason[0] = BWN_READ_4(mac, BWN_DMA0_REASON) & 0x0001dc00;
	mac->mac_reason[1] = BWN_READ_4(mac, BWN_DMA1_REASON) & 0x0000dc00;
	mac->mac_reason[2] = BWN_READ_4(mac, BWN_DMA2_REASON) & 0x0000dc00;
	mac->mac_reason[3] = BWN_READ_4(mac, BWN_DMA3_REASON) & 0x0001dc00;
	mac->mac_reason[4] = BWN_READ_4(mac, BWN_DMA4_REASON) & 0x0000dc00;
	BWN_WRITE_4(mac, BWN_INTR_REASON, reason);
	BWN_WRITE_4(mac, BWN_DMA0_REASON, mac->mac_reason[0]);
	BWN_WRITE_4(mac, BWN_DMA1_REASON, mac->mac_reason[1]);
	BWN_WRITE_4(mac, BWN_DMA2_REASON, mac->mac_reason[2]);
	BWN_WRITE_4(mac, BWN_DMA3_REASON, mac->mac_reason[3]);
	BWN_WRITE_4(mac, BWN_DMA4_REASON, mac->mac_reason[4]);

	/* Disable interrupts. */
	BWN_WRITE_4(mac, BWN_INTR_MASK, 0);

	mac->mac_reason_intr = reason;

	BWN_BARRIER(mac, BUS_SPACE_BARRIER_READ);
	BWN_BARRIER(mac, BUS_SPACE_BARRIER_WRITE);

	taskqueue_enqueue(sc->sc_tq, &mac->mac_intrtask);
	return (FILTER_HANDLED);
}

static void
bwn_intrtask(void *arg, int npending)
{
	struct bwn_mac *mac = arg;
	struct bwn_softc *sc = mac->mac_sc;
	uint32_t merged = 0;
	int i, tx = 0, rx = 0;

	BWN_LOCK(sc);
	if (mac->mac_status < BWN_MAC_STATUS_STARTED ||
	    (sc->sc_flags & BWN_FLAG_INVALID)) {
		BWN_UNLOCK(sc);
		return;
	}

	for (i = 0; i < N(mac->mac_reason); i++)
		merged |= mac->mac_reason[i];

	if (mac->mac_reason_intr & BWN_INTR_MAC_TXERR)
		device_printf(sc->sc_dev, "MAC trans error\n");

	if (mac->mac_reason_intr & BWN_INTR_PHY_TXERR) {
		DPRINTF(sc, BWN_DEBUG_INTR, "%s: PHY trans error\n", __func__);
		mac->mac_phy.txerrors--;
		if (mac->mac_phy.txerrors == 0) {
			mac->mac_phy.txerrors = BWN_TXERROR_MAX;
			bwn_restart(mac, "PHY TX errors");
		}
	}

	if (merged & (BWN_DMAINTR_FATALMASK | BWN_DMAINTR_NONFATALMASK)) {
		if (merged & BWN_DMAINTR_FATALMASK) {
			device_printf(sc->sc_dev,
			    "Fatal DMA error: %#x %#x %#x %#x %#x %#x\n",
			    mac->mac_reason[0], mac->mac_reason[1],
			    mac->mac_reason[2], mac->mac_reason[3],
			    mac->mac_reason[4], mac->mac_reason[5]);
			bwn_restart(mac, "DMA error");
			BWN_UNLOCK(sc);
			return;
		}
		if (merged & BWN_DMAINTR_NONFATALMASK) {
			device_printf(sc->sc_dev,
			    "DMA error: %#x %#x %#x %#x %#x %#x\n",
			    mac->mac_reason[0], mac->mac_reason[1],
			    mac->mac_reason[2], mac->mac_reason[3],
			    mac->mac_reason[4], mac->mac_reason[5]);
		}
	}

	if (mac->mac_reason_intr & BWN_INTR_UCODE_DEBUG)
		bwn_intr_ucode_debug(mac);
	if (mac->mac_reason_intr & BWN_INTR_TBTT_INDI)
		bwn_intr_tbtt_indication(mac);
	if (mac->mac_reason_intr & BWN_INTR_ATIM_END)
		bwn_intr_atim_end(mac);
	if (mac->mac_reason_intr & BWN_INTR_BEACON)
		bwn_intr_beacon(mac);
	if (mac->mac_reason_intr & BWN_INTR_PMQ)
		bwn_intr_pmq(mac);
	if (mac->mac_reason_intr & BWN_INTR_NOISESAMPLE_OK)
		bwn_intr_noise(mac);

	if (mac->mac_flags & BWN_MAC_FLAG_DMA) {
		if (mac->mac_reason[0] & BWN_DMAINTR_RX_DONE) {
			bwn_dma_rx(mac->mac_method.dma.rx);
			rx = 1;
		}
	} else
		rx = bwn_pio_rx(&mac->mac_method.pio.rx);

	KASSERT(!(mac->mac_reason[1] & BWN_DMAINTR_RX_DONE), ("%s", __func__));
	KASSERT(!(mac->mac_reason[2] & BWN_DMAINTR_RX_DONE), ("%s", __func__));
	KASSERT(!(mac->mac_reason[3] & BWN_DMAINTR_RX_DONE), ("%s", __func__));
	KASSERT(!(mac->mac_reason[4] & BWN_DMAINTR_RX_DONE), ("%s", __func__));
	KASSERT(!(mac->mac_reason[5] & BWN_DMAINTR_RX_DONE), ("%s", __func__));

	if (mac->mac_reason_intr & BWN_INTR_TX_OK) {
		bwn_intr_txeof(mac);
		tx = 1;
	}

	BWN_WRITE_4(mac, BWN_INTR_MASK, mac->mac_intr_mask);

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

		if (tx && rx) {
			if (sc->sc_rx_rate > sc->sc_tx_rate)
				evt = BWN_LED_EVENT_RX;
			else
				evt = BWN_LED_EVENT_TX;
		} else if (tx) {
			evt = BWN_LED_EVENT_TX;
		} else if (rx) {
			evt = BWN_LED_EVENT_RX;
		} else if (rx == 0) {
			evt = BWN_LED_EVENT_POLL;
		}

		if (evt != BWN_LED_EVENT_NONE)
			bwn_led_event(mac, evt);
       }

	if (mbufq_first(&sc->sc_snd) != NULL)
		bwn_start(sc);

	BWN_BARRIER(mac, BUS_SPACE_BARRIER_READ);
	BWN_BARRIER(mac, BUS_SPACE_BARRIER_WRITE);

	BWN_UNLOCK(sc);
}

static void
bwn_restart(struct bwn_mac *mac, const char *msg)
{
	struct bwn_softc *sc = mac->mac_sc;
	struct ieee80211com *ic = &sc->sc_ic;

	if (mac->mac_status < BWN_MAC_STATUS_INITED)
		return;

	device_printf(sc->sc_dev, "HW reset: %s\n", msg);
	ieee80211_runtask(ic, &mac->mac_hwreset);
}

static void
bwn_intr_ucode_debug(struct bwn_mac *mac)
{
	struct bwn_softc *sc = mac->mac_sc;
	uint16_t reason;

	if (mac->mac_fw.opensource == 0)
		return;

	reason = bwn_shm_read_2(mac, BWN_SCRATCH, BWN_DEBUGINTR_REASON_REG);
	switch (reason) {
	case BWN_DEBUGINTR_PANIC:
		bwn_handle_fwpanic(mac);
		break;
	case BWN_DEBUGINTR_DUMP_SHM:
		device_printf(sc->sc_dev, "BWN_DEBUGINTR_DUMP_SHM\n");
		break;
	case BWN_DEBUGINTR_DUMP_REGS:
		device_printf(sc->sc_dev, "BWN_DEBUGINTR_DUMP_REGS\n");
		break;
	case BWN_DEBUGINTR_MARKER:
		device_printf(sc->sc_dev, "BWN_DEBUGINTR_MARKER\n");
		break;
	default:
		device_printf(sc->sc_dev,
		    "ucode debug unknown reason: %#x\n", reason);
	}

	bwn_shm_write_2(mac, BWN_SCRATCH, BWN_DEBUGINTR_REASON_REG,
	    BWN_DEBUGINTR_ACK);
}

static void
bwn_intr_tbtt_indication(struct bwn_mac *mac)
{
	struct bwn_softc *sc = mac->mac_sc;
	struct ieee80211com *ic = &sc->sc_ic;

	if (ic->ic_opmode != IEEE80211_M_HOSTAP)
		bwn_psctl(mac, 0);
	if (ic->ic_opmode == IEEE80211_M_IBSS)
		mac->mac_flags |= BWN_MAC_FLAG_DFQVALID;
}

static void
bwn_intr_atim_end(struct bwn_mac *mac)
{

	if (mac->mac_flags & BWN_MAC_FLAG_DFQVALID) {
		BWN_WRITE_4(mac, BWN_MACCMD,
		    BWN_READ_4(mac, BWN_MACCMD) | BWN_MACCMD_DFQ_VALID);
		mac->mac_flags &= ~BWN_MAC_FLAG_DFQVALID;
	}
}

static void
bwn_intr_beacon(struct bwn_mac *mac)
{
	struct bwn_softc *sc = mac->mac_sc;
	struct ieee80211com *ic = &sc->sc_ic;
	uint32_t cmd, beacon0, beacon1;

	if (ic->ic_opmode == IEEE80211_M_HOSTAP ||
	    ic->ic_opmode == IEEE80211_M_MBSS)
		return;

	mac->mac_intr_mask &= ~BWN_INTR_BEACON;

	cmd = BWN_READ_4(mac, BWN_MACCMD);
	beacon0 = (cmd & BWN_MACCMD_BEACON0_VALID);
	beacon1 = (cmd & BWN_MACCMD_BEACON1_VALID);

	if (beacon0 && beacon1) {
		BWN_WRITE_4(mac, BWN_INTR_REASON, BWN_INTR_BEACON);
		mac->mac_intr_mask |= BWN_INTR_BEACON;
		return;
	}

	if (sc->sc_flags & BWN_FLAG_NEED_BEACON_TP) {
		sc->sc_flags &= ~BWN_FLAG_NEED_BEACON_TP;
		bwn_load_beacon0(mac);
		bwn_load_beacon1(mac);
		cmd = BWN_READ_4(mac, BWN_MACCMD);
		cmd |= BWN_MACCMD_BEACON0_VALID;
		BWN_WRITE_4(mac, BWN_MACCMD, cmd);
	} else {
		if (!beacon0) {
			bwn_load_beacon0(mac);
			cmd = BWN_READ_4(mac, BWN_MACCMD);
			cmd |= BWN_MACCMD_BEACON0_VALID;
			BWN_WRITE_4(mac, BWN_MACCMD, cmd);
		} else if (!beacon1) {
			bwn_load_beacon1(mac);
			cmd = BWN_READ_4(mac, BWN_MACCMD);
			cmd |= BWN_MACCMD_BEACON1_VALID;
			BWN_WRITE_4(mac, BWN_MACCMD, cmd);
		}
	}
}

static void
bwn_intr_pmq(struct bwn_mac *mac)
{
	uint32_t tmp;

	while (1) {
		tmp = BWN_READ_4(mac, BWN_PS_STATUS);
		if (!(tmp & 0x00000008))
			break;
	}
	BWN_WRITE_2(mac, BWN_PS_STATUS, 0x0002);
}

static void
bwn_intr_noise(struct bwn_mac *mac)
{
	struct bwn_phy_g *pg = &mac->mac_phy.phy_g;
	uint16_t tmp;
	uint8_t noise[4];
	uint8_t i, j;
	int32_t average;

	if (mac->mac_phy.type != BWN_PHYTYPE_G)
		return;

	KASSERT(mac->mac_noise.noi_running, ("%s: fail", __func__));
	*((uint32_t *)noise) = htole32(bwn_jssi_read(mac));
	if (noise[0] == 0x7f || noise[1] == 0x7f || noise[2] == 0x7f ||
	    noise[3] == 0x7f)
		goto new;

	KASSERT(mac->mac_noise.noi_nsamples < 8,
	    ("%s:%d: fail", __func__, __LINE__));
	i = mac->mac_noise.noi_nsamples;
	noise[0] = MIN(MAX(noise[0], 0), N(pg->pg_nrssi_lt) - 1);
	noise[1] = MIN(MAX(noise[1], 0), N(pg->pg_nrssi_lt) - 1);
	noise[2] = MIN(MAX(noise[2], 0), N(pg->pg_nrssi_lt) - 1);
	noise[3] = MIN(MAX(noise[3], 0), N(pg->pg_nrssi_lt) - 1);
	mac->mac_noise.noi_samples[i][0] = pg->pg_nrssi_lt[noise[0]];
	mac->mac_noise.noi_samples[i][1] = pg->pg_nrssi_lt[noise[1]];
	mac->mac_noise.noi_samples[i][2] = pg->pg_nrssi_lt[noise[2]];
	mac->mac_noise.noi_samples[i][3] = pg->pg_nrssi_lt[noise[3]];
	mac->mac_noise.noi_nsamples++;
	if (mac->mac_noise.noi_nsamples == 8) {
		average = 0;
		for (i = 0; i < 8; i++) {
			for (j = 0; j < 4; j++)
				average += mac->mac_noise.noi_samples[i][j];
		}
		average = (((average / 32) * 125) + 64) / 128;
		tmp = (bwn_shm_read_2(mac, BWN_SHARED, 0x40c) / 128) & 0x1f;
		if (tmp >= 8)
			average += 2;
		else
			average -= 25;
		average -= (tmp == 8) ? 72 : 48;

		mac->mac_stats.link_noise = average;
		mac->mac_noise.noi_running = 0;
		return;
	}
new:
	bwn_noise_gensample(mac);
}

static int
bwn_pio_rx(struct bwn_pio_rxqueue *prq)
{
	struct bwn_mac *mac = prq->prq_mac;
	struct bwn_softc *sc = mac->mac_sc;
	unsigned int i;

	BWN_ASSERT_LOCKED(sc);

	if (mac->mac_status < BWN_MAC_STATUS_STARTED)
		return (0);

	for (i = 0; i < 5000; i++) {
		if (bwn_pio_rxeof(prq) == 0)
			break;
	}
	if (i >= 5000)
		device_printf(sc->sc_dev, "too many RX frames in PIO mode\n");
	return ((i > 0) ? 1 : 0);
}

static void
bwn_dma_rx(struct bwn_dma_ring *dr)
{
	int slot, curslot;

	KASSERT(!dr->dr_tx, ("%s:%d: fail", __func__, __LINE__));
	curslot = dr->get_curslot(dr);
	KASSERT(curslot >= 0 && curslot < dr->dr_numslots,
	    ("%s:%d: fail", __func__, __LINE__));

	slot = dr->dr_curslot;
	for (; slot != curslot; slot = bwn_dma_nextslot(dr, slot))
		bwn_dma_rxeof(dr, &slot);

	bus_dmamap_sync(dr->dr_ring_dtag, dr->dr_ring_dmap,
	    BUS_DMASYNC_PREWRITE);

	dr->set_curslot(dr, slot);
	dr->dr_curslot = slot;
}

static void
bwn_intr_txeof(struct bwn_mac *mac)
{
	struct bwn_txstatus stat;
	uint32_t stat0, stat1;
	uint16_t tmp;

	BWN_ASSERT_LOCKED(mac->mac_sc);

	while (1) {
		stat0 = BWN_READ_4(mac, BWN_XMITSTAT_0);
		if (!(stat0 & 0x00000001))
			break;
		stat1 = BWN_READ_4(mac, BWN_XMITSTAT_1);

		DPRINTF(mac->mac_sc, BWN_DEBUG_XMIT,
		    "%s: stat0=0x%08x, stat1=0x%08x\n",
		    __func__,
		    stat0,
		    stat1);

		stat.cookie = (stat0 >> 16);
		stat.seq = (stat1 & 0x0000ffff);
		stat.phy_stat = ((stat1 & 0x00ff0000) >> 16);
		tmp = (stat0 & 0x0000ffff);
		stat.framecnt = ((tmp & 0xf000) >> 12);
		stat.rtscnt = ((tmp & 0x0f00) >> 8);
		stat.sreason = ((tmp & 0x001c) >> 2);
		stat.pm = (tmp & 0x0080) ? 1 : 0;
		stat.im = (tmp & 0x0040) ? 1 : 0;
		stat.ampdu = (tmp & 0x0020) ? 1 : 0;
		stat.ack = (tmp & 0x0002) ? 1 : 0;

		DPRINTF(mac->mac_sc, BWN_DEBUG_XMIT,
		    "%s: cookie=%d, seq=%d, phystat=0x%02x, framecnt=%d, "
		    "rtscnt=%d, sreason=%d, pm=%d, im=%d, ampdu=%d, ack=%d\n",
		    __func__,
		    stat.cookie,
		    stat.seq,
		    stat.phy_stat,
		    stat.framecnt,
		    stat.rtscnt,
		    stat.sreason,
		    stat.pm,
		    stat.im,
		    stat.ampdu,
		    stat.ack);

		bwn_handle_txeof(mac, &stat);
	}
}

static void
bwn_hwreset(void *arg, int npending)
{
	struct bwn_mac *mac = arg;
	struct bwn_softc *sc = mac->mac_sc;
	int error = 0;
	int prev_status;

	BWN_LOCK(sc);

	prev_status = mac->mac_status;
	if (prev_status >= BWN_MAC_STATUS_STARTED)
		bwn_core_stop(mac);
	if (prev_status >= BWN_MAC_STATUS_INITED)
		bwn_core_exit(mac);

	if (prev_status >= BWN_MAC_STATUS_INITED) {
		error = bwn_core_init(mac);
		if (error)
			goto out;
	}
	if (prev_status >= BWN_MAC_STATUS_STARTED)
		bwn_core_start(mac);
out:
	if (error) {
		device_printf(sc->sc_dev, "%s: failed (%d)\n", __func__, error);
		sc->sc_curmac = NULL;
	}
	BWN_UNLOCK(sc);
}

static void
bwn_handle_fwpanic(struct bwn_mac *mac)
{
	struct bwn_softc *sc = mac->mac_sc;
	uint16_t reason;

	reason = bwn_shm_read_2(mac, BWN_SCRATCH, BWN_FWPANIC_REASON_REG);
	device_printf(sc->sc_dev,"fw panic (%u)\n", reason);

	if (reason == BWN_FWPANIC_RESTART)
		bwn_restart(mac, "ucode panic");
}

static void
bwn_load_beacon0(struct bwn_mac *mac)
{

	KASSERT(0 == 1, ("%s:%d: fail", __func__, __LINE__));
}

static void
bwn_load_beacon1(struct bwn_mac *mac)
{

	KASSERT(0 == 1, ("%s:%d: fail", __func__, __LINE__));
}

static uint32_t
bwn_jssi_read(struct bwn_mac *mac)
{
	uint32_t val = 0;

	val = bwn_shm_read_2(mac, BWN_SHARED, 0x08a);
	val <<= 16;
	val |= bwn_shm_read_2(mac, BWN_SHARED, 0x088);

	return (val);
}

static void
bwn_noise_gensample(struct bwn_mac *mac)
{
	uint32_t jssi = 0x7f7f7f7f;

	bwn_shm_write_2(mac, BWN_SHARED, 0x088, (jssi & 0x0000ffff));
	bwn_shm_write_2(mac, BWN_SHARED, 0x08a, (jssi & 0xffff0000) >> 16);
	BWN_WRITE_4(mac, BWN_MACCMD,
	    BWN_READ_4(mac, BWN_MACCMD) | BWN_MACCMD_BGNOISE);
}

static int
bwn_dma_freeslot(struct bwn_dma_ring *dr)
{
	BWN_ASSERT_LOCKED(dr->dr_mac->mac_sc);

	return (dr->dr_numslots - dr->dr_usedslot);
}

static int
bwn_dma_nextslot(struct bwn_dma_ring *dr, int slot)
{
	BWN_ASSERT_LOCKED(dr->dr_mac->mac_sc);

	KASSERT(slot >= -1 && slot <= dr->dr_numslots - 1,
	    ("%s:%d: fail", __func__, __LINE__));
	if (slot == dr->dr_numslots - 1)
		return (0);
	return (slot + 1);
}

static void
bwn_dma_rxeof(struct bwn_dma_ring *dr, int *slot)
{
	struct bwn_mac *mac = dr->dr_mac;
	struct bwn_softc *sc = mac->mac_sc;
	struct bwn_dma *dma = &mac->mac_method.dma;
	struct bwn_dmadesc_generic *desc;
	struct bwn_dmadesc_meta *meta;
	struct bwn_rxhdr4 *rxhdr;
	struct mbuf *m;
	uint32_t macstat;
	int32_t tmp;
	int cnt = 0;
	uint16_t len;

	dr->getdesc(dr, *slot, &desc, &meta);

	bus_dmamap_sync(dma->rxbuf_dtag, meta->mt_dmap, BUS_DMASYNC_POSTREAD);
	m = meta->mt_m;

	if (bwn_dma_newbuf(dr, desc, meta, 0)) {
		counter_u64_add(sc->sc_ic.ic_ierrors, 1);
		return;
	}

	rxhdr = mtod(m, struct bwn_rxhdr4 *);
	len = le16toh(rxhdr->frame_len);
	if (len <= 0) {
		counter_u64_add(sc->sc_ic.ic_ierrors, 1);
		return;
	}
	if (bwn_dma_check_redzone(dr, m)) {
		device_printf(sc->sc_dev, "redzone error.\n");
		bwn_dma_set_redzone(dr, m);
		bus_dmamap_sync(dma->rxbuf_dtag, meta->mt_dmap,
		    BUS_DMASYNC_PREWRITE);
		return;
	}
	if (len > dr->dr_rx_bufsize) {
		tmp = len;
		while (1) {
			dr->getdesc(dr, *slot, &desc, &meta);
			bwn_dma_set_redzone(dr, meta->mt_m);
			bus_dmamap_sync(dma->rxbuf_dtag, meta->mt_dmap,
			    BUS_DMASYNC_PREWRITE);
			*slot = bwn_dma_nextslot(dr, *slot);
			cnt++;
			tmp -= dr->dr_rx_bufsize;
			if (tmp <= 0)
				break;
		}
		device_printf(sc->sc_dev, "too small buffer "
		       "(len %u buffer %u dropped %d)\n",
		       len, dr->dr_rx_bufsize, cnt);
		return;
	}
	macstat = le32toh(rxhdr->mac_status);
	if (macstat & BWN_RX_MAC_FCSERR) {
		if (!(mac->mac_sc->sc_filters & BWN_MACCTL_PASS_BADFCS)) {
			device_printf(sc->sc_dev, "RX drop\n");
			return;
		}
	}

	m->m_len = m->m_pkthdr.len = len + dr->dr_frameoffset;
	m_adj(m, dr->dr_frameoffset);

	bwn_rxeof(dr->dr_mac, m, rxhdr);
}

static void
bwn_handle_txeof(struct bwn_mac *mac, const struct bwn_txstatus *status)
{
	struct bwn_softc *sc = mac->mac_sc;
	struct bwn_stats *stats = &mac->mac_stats;

	BWN_ASSERT_LOCKED(mac->mac_sc);

	if (status->im)
		device_printf(sc->sc_dev, "TODO: STATUS IM\n");
	if (status->ampdu)
		device_printf(sc->sc_dev, "TODO: STATUS AMPDU\n");
	if (status->rtscnt) {
		if (status->rtscnt == 0xf)
			stats->rtsfail++;
		else
			stats->rts++;
	}

	if (mac->mac_flags & BWN_MAC_FLAG_DMA) {
		bwn_dma_handle_txeof(mac, status);
	} else {
		bwn_pio_handle_txeof(mac, status);
	}

	bwn_phy_txpower_check(mac, 0);
}

static uint8_t
bwn_pio_rxeof(struct bwn_pio_rxqueue *prq)
{
	struct bwn_mac *mac = prq->prq_mac;
	struct bwn_softc *sc = mac->mac_sc;
	struct bwn_rxhdr4 rxhdr;
	struct mbuf *m;
	uint32_t ctl32, macstat, v32;
	unsigned int i, padding;
	uint16_t ctl16, len, totlen, v16;
	unsigned char *mp;
	char *data;

	memset(&rxhdr, 0, sizeof(rxhdr));

	if (prq->prq_rev >= 8) {
		ctl32 = bwn_pio_rx_read_4(prq, BWN_PIO8_RXCTL);
		if (!(ctl32 & BWN_PIO8_RXCTL_FRAMEREADY))
			return (0);
		bwn_pio_rx_write_4(prq, BWN_PIO8_RXCTL,
		    BWN_PIO8_RXCTL_FRAMEREADY);
		for (i = 0; i < 10; i++) {
			ctl32 = bwn_pio_rx_read_4(prq, BWN_PIO8_RXCTL);
			if (ctl32 & BWN_PIO8_RXCTL_DATAREADY)
				goto ready;
			DELAY(10);
		}
	} else {
		ctl16 = bwn_pio_rx_read_2(prq, BWN_PIO_RXCTL);
		if (!(ctl16 & BWN_PIO_RXCTL_FRAMEREADY))
			return (0);
		bwn_pio_rx_write_2(prq, BWN_PIO_RXCTL,
		    BWN_PIO_RXCTL_FRAMEREADY);
		for (i = 0; i < 10; i++) {
			ctl16 = bwn_pio_rx_read_2(prq, BWN_PIO_RXCTL);
			if (ctl16 & BWN_PIO_RXCTL_DATAREADY)
				goto ready;
			DELAY(10);
		}
	}
	device_printf(sc->sc_dev, "%s: timed out\n", __func__);
	return (1);
ready:
	if (prq->prq_rev >= 8)
		siba_read_multi_4(sc->sc_dev, &rxhdr, sizeof(rxhdr),
		    prq->prq_base + BWN_PIO8_RXDATA);
	else
		siba_read_multi_2(sc->sc_dev, &rxhdr, sizeof(rxhdr),
		    prq->prq_base + BWN_PIO_RXDATA);
	len = le16toh(rxhdr.frame_len);
	if (len > 0x700) {
		device_printf(sc->sc_dev, "%s: len is too big\n", __func__);
		goto error;
	}
	if (len == 0) {
		device_printf(sc->sc_dev, "%s: len is 0\n", __func__);
		goto error;
	}

	macstat = le32toh(rxhdr.mac_status);
	if (macstat & BWN_RX_MAC_FCSERR) {
		if (!(mac->mac_sc->sc_filters & BWN_MACCTL_PASS_BADFCS)) {
			device_printf(sc->sc_dev, "%s: FCS error", __func__);
			goto error;
		}
	}

	padding = (macstat & BWN_RX_MAC_PADDING) ? 2 : 0;
	totlen = len + padding;
	KASSERT(totlen <= MCLBYTES, ("too big..\n"));
	m = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR);
	if (m == NULL) {
		device_printf(sc->sc_dev, "%s: out of memory", __func__);
		goto error;
	}
	mp = mtod(m, unsigned char *);
	if (prq->prq_rev >= 8) {
		siba_read_multi_4(sc->sc_dev, mp, (totlen & ~3),
		    prq->prq_base + BWN_PIO8_RXDATA);
		if (totlen & 3) {
			v32 = bwn_pio_rx_read_4(prq, BWN_PIO8_RXDATA);
			data = &(mp[totlen - 1]);
			switch (totlen & 3) {
			case 3:
				*data = (v32 >> 16);
				data--;
			case 2:
				*data = (v32 >> 8);
				data--;
			case 1:
				*data = v32;
			}
		}
	} else {
		siba_read_multi_2(sc->sc_dev, mp, (totlen & ~1),
		    prq->prq_base + BWN_PIO_RXDATA);
		if (totlen & 1) {
			v16 = bwn_pio_rx_read_2(prq, BWN_PIO_RXDATA);
			mp[totlen - 1] = v16;
		}
	}

	m->m_len = m->m_pkthdr.len = totlen;

	bwn_rxeof(prq->prq_mac, m, &rxhdr);

	return (1);
error:
	if (prq->prq_rev >= 8)
		bwn_pio_rx_write_4(prq, BWN_PIO8_RXCTL,
		    BWN_PIO8_RXCTL_DATAREADY);
	else
		bwn_pio_rx_write_2(prq, BWN_PIO_RXCTL, BWN_PIO_RXCTL_DATAREADY);
	return (1);
}

static int
bwn_dma_newbuf(struct bwn_dma_ring *dr, struct bwn_dmadesc_generic *desc,
    struct bwn_dmadesc_meta *meta, int init)
{
	struct bwn_mac *mac = dr->dr_mac;
	struct bwn_dma *dma = &mac->mac_method.dma;
	struct bwn_rxhdr4 *hdr;
	bus_dmamap_t map;
	bus_addr_t paddr;
	struct mbuf *m;
	int error;

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

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

	bwn_dma_set_redzone(dr, m);

	/*
	 * Try to load RX buf into temporary DMA map
	 */
	error = bus_dmamap_load_mbuf(dma->rxbuf_dtag, dr->dr_spare_dmap, m,
	    bwn_dma_buf_addr, &paddr, BUS_DMA_NOWAIT);
	if (error) {
		m_freem(m);

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

	if (!init)
		bus_dmamap_unload(dma->rxbuf_dtag, meta->mt_dmap);
	meta->mt_m = m;
	meta->mt_paddr = paddr;

	/*
	 * Swap RX buf's DMA map with the loaded temporary one
	 */
	map = meta->mt_dmap;
	meta->mt_dmap = dr->dr_spare_dmap;
	dr->dr_spare_dmap = map;

back:
	/*
	 * Clear RX buf header
	 */
	hdr = mtod(meta->mt_m, struct bwn_rxhdr4 *);
	bzero(hdr, sizeof(*hdr));
	bus_dmamap_sync(dma->rxbuf_dtag, meta->mt_dmap,
	    BUS_DMASYNC_PREWRITE);

	/*
	 * Setup RX buf descriptor
	 */
	dr->setdesc(dr, desc, meta->mt_paddr, meta->mt_m->m_len -
	    sizeof(*hdr), 0, 0, 0);
	return (error);
}

static void
bwn_dma_buf_addr(void *arg, bus_dma_segment_t *seg, int nseg,
		 bus_size_t mapsz __unused, int error)
{

	if (!error) {
		KASSERT(nseg == 1, ("too many segments(%d)\n", nseg));
		*((bus_addr_t *)arg) = seg->ds_addr;
	}
}

static int
bwn_hwrate2ieeerate(int rate)
{

	switch (rate) {
	case BWN_CCK_RATE_1MB:
		return (2);
	case BWN_CCK_RATE_2MB:
		return (4);
	case BWN_CCK_RATE_5MB:
		return (11);
	case BWN_CCK_RATE_11MB:
		return (22);
	case BWN_OFDM_RATE_6MB:
		return (12);
	case BWN_OFDM_RATE_9MB:
		return (18);
	case BWN_OFDM_RATE_12MB:
		return (24);
	case BWN_OFDM_RATE_18MB:
		return (36);
	case BWN_OFDM_RATE_24MB:
		return (48);
	case BWN_OFDM_RATE_36MB:
		return (72);
	case BWN_OFDM_RATE_48MB:
		return (96);
	case BWN_OFDM_RATE_54MB:
		return (108);
	default:
		printf("Ooops\n");
		return (0);
	}
}

/*
 * Post process the RX provided RSSI.
 *
 * Valid for A, B, G, LP PHYs.
 */
static int8_t
bwn_rx_rssi_calc(struct bwn_mac *mac, uint8_t in_rssi,
    int ofdm, int adjust_2053, int adjust_2050)
{
	struct bwn_phy *phy = &mac->mac_phy;
	struct bwn_phy_g *gphy = &phy->phy_g;
	int tmp;

	switch (phy->rf_ver) {
	case 0x2050:
		if (ofdm) {
			tmp = in_rssi;
			if (tmp > 127)
				tmp -= 256;
			tmp = tmp * 73 / 64;
			if (adjust_2050)
				tmp += 25;
			else
				tmp -= 3;
		} else {
			if (siba_sprom_get_bf_lo(mac->mac_sc->sc_dev)
			    & BWN_BFL_RSSI) {
				if (in_rssi > 63)
					in_rssi = 63;
				tmp = gphy->pg_nrssi_lt[in_rssi];
				tmp = (31 - tmp) * -131 / 128 - 57;
			} else {
				tmp = in_rssi;
				tmp = (31 - tmp) * -149 / 128 - 68;
			}
			if (phy->type == BWN_PHYTYPE_G && adjust_2050)
				tmp += 25;
		}
		break;
	case 0x2060:
		if (in_rssi > 127)
			tmp = in_rssi - 256;
		else
			tmp = in_rssi;
		break;
	default:
		tmp = in_rssi;
		tmp = (tmp - 11) * 103 / 64;
		if (adjust_2053)
			tmp -= 109;
		else
			tmp -= 83;
	}

	return (tmp);
}

static void
bwn_rxeof(struct bwn_mac *mac, struct mbuf *m, const void *_rxhdr)
{
	const struct bwn_rxhdr4 *rxhdr = _rxhdr;
	struct bwn_plcp6 *plcp;
	struct bwn_softc *sc = mac->mac_sc;
	struct ieee80211_frame_min *wh;
	struct ieee80211_node *ni;
	struct ieee80211com *ic = &sc->sc_ic;
	uint32_t macstat;
	int padding, rate, rssi = 0, noise = 0, type;
	uint16_t phytype, phystat0, phystat3, chanstat;
	unsigned char *mp = mtod(m, unsigned char *);
	static int rx_mac_dec_rpt = 0;

	BWN_ASSERT_LOCKED(sc);

	phystat0 = le16toh(rxhdr->phy_status0);
	phystat3 = le16toh(rxhdr->phy_status3);

	/* XXX Note: mactime, macstat, chanstat need fixing for fw 598 */
	macstat = le32toh(rxhdr->mac_status);
	chanstat = le16toh(rxhdr->channel);

	phytype = chanstat & BWN_RX_CHAN_PHYTYPE;

	if (macstat & BWN_RX_MAC_FCSERR)
		device_printf(sc->sc_dev, "TODO RX: RX_FLAG_FAILED_FCS_CRC\n");
	if (phystat0 & (BWN_RX_PHYST0_PLCPHCF | BWN_RX_PHYST0_PLCPFV))
		device_printf(sc->sc_dev, "TODO RX: RX_FLAG_FAILED_PLCP_CRC\n");
	if (macstat & BWN_RX_MAC_DECERR)
		goto drop;

	padding = (macstat & BWN_RX_MAC_PADDING) ? 2 : 0;
	if (m->m_pkthdr.len < (sizeof(struct bwn_plcp6) + padding)) {
		device_printf(sc->sc_dev, "frame too short (length=%d)\n",
		    m->m_pkthdr.len);
		goto drop;
	}
	plcp = (struct bwn_plcp6 *)(mp + padding);
	m_adj(m, sizeof(struct bwn_plcp6) + padding);
	if (m->m_pkthdr.len < IEEE80211_MIN_LEN) {
		device_printf(sc->sc_dev, "frame too short (length=%d)\n",
		    m->m_pkthdr.len);
		goto drop;
	}
	wh = mtod(m, struct ieee80211_frame_min *);

	if (macstat & BWN_RX_MAC_DEC && rx_mac_dec_rpt++ < 50)
		device_printf(sc->sc_dev,
		    "RX decryption attempted (old %d keyidx %#x)\n",
		    BWN_ISOLDFMT(mac),
		    (macstat & BWN_RX_MAC_KEYIDX) >> BWN_RX_MAC_KEYIDX_SHIFT);

	if (phystat0 & BWN_RX_PHYST0_OFDM)
		rate = bwn_plcp_get_ofdmrate(mac, plcp,
		    phytype == BWN_PHYTYPE_A);
	else
		rate = bwn_plcp_get_cckrate(mac, plcp);
	if (rate == -1) {
		if (!(mac->mac_sc->sc_filters & BWN_MACCTL_PASS_BADPLCP))
			goto drop;
	}
	sc->sc_rx_rate = bwn_hwrate2ieeerate(rate);

	/* rssi/noise */
	switch (phytype) {
	case BWN_PHYTYPE_A:
	case BWN_PHYTYPE_B:
	case BWN_PHYTYPE_G:
	case BWN_PHYTYPE_LP:
		rssi = bwn_rx_rssi_calc(mac, rxhdr->phy.abg.rssi,
		    !! (phystat0 & BWN_RX_PHYST0_OFDM),
		    !! (phystat0 & BWN_RX_PHYST0_GAINCTL),
		    !! (phystat3 & BWN_RX_PHYST3_TRSTATE));
		break;
	case BWN_PHYTYPE_N:
		/* Broadcom has code for min/avg, but always used max */
		if (rxhdr->phy.n.power0 == 16 || rxhdr->phy.n.power0 == 32)
			rssi = max(rxhdr->phy.n.power1, rxhdr->ps2.n.power2);
		else
			rssi = max(rxhdr->phy.n.power0, rxhdr->phy.n.power1);
		break;
	default:
		/* XXX TODO: implement rssi for other PHYs */
		break;
	}

	noise = mac->mac_stats.link_noise;

	/* RX radio tap */
	if (ieee80211_radiotap_active(ic))
		bwn_rx_radiotap(mac, m, rxhdr, plcp, rate, rssi, noise);
	m_adj(m, -IEEE80211_CRC_LEN);

	BWN_UNLOCK(sc);

	ni = ieee80211_find_rxnode(ic, wh);
	if (ni != NULL) {
		type = ieee80211_input(ni, m, rssi, noise);
		ieee80211_free_node(ni);
	} else
		type = ieee80211_input_all(ic, m, rssi, noise);

	BWN_LOCK(sc);
	return;
drop:
	device_printf(sc->sc_dev, "%s: dropped\n", __func__);
}

static void
bwn_dma_handle_txeof(struct bwn_mac *mac,
    const struct bwn_txstatus *status)
{
	struct bwn_dma *dma = &mac->mac_method.dma;
	struct bwn_dma_ring *dr;
	struct bwn_dmadesc_generic *desc;
	struct bwn_dmadesc_meta *meta;
	struct bwn_softc *sc = mac->mac_sc;
	int slot;
	int retrycnt = 0;

	BWN_ASSERT_LOCKED(sc);

	dr = bwn_dma_parse_cookie(mac, status, status->cookie, &slot);
	if (dr == NULL) {
		device_printf(sc->sc_dev, "failed to parse cookie\n");
		return;
	}
	KASSERT(dr->dr_tx, ("%s:%d: fail", __func__, __LINE__));

	while (1) {
		KASSERT(slot >= 0 && slot < dr->dr_numslots,
		    ("%s:%d: fail", __func__, __LINE__));
		dr->getdesc(dr, slot, &desc, &meta);

		if (meta->mt_txtype == BWN_DMADESC_METATYPE_HEADER)
			bus_dmamap_unload(dr->dr_txring_dtag, meta->mt_dmap);
		else if (meta->mt_txtype == BWN_DMADESC_METATYPE_BODY)
			bus_dmamap_unload(dma->txbuf_dtag, meta->mt_dmap);

		if (meta->mt_islast) {
			KASSERT(meta->mt_m != NULL,
			    ("%s:%d: fail", __func__, __LINE__));

			/*
			 * If we don't get an ACK, then we should log the
			 * full framecnt.  That may be 0 if it's a PHY
			 * failure, so ensure that gets logged as some
			 * retry attempt.
			 */
			if (status->ack) {
				retrycnt = status->framecnt - 1;
			} else {
				retrycnt = status->framecnt;
				if (retrycnt == 0)
					retrycnt = 1;
			}
			ieee80211_ratectl_tx_complete(meta->mt_ni->ni_vap, meta->mt_ni,
			    status->ack ?
			      IEEE80211_RATECTL_TX_SUCCESS :
			      IEEE80211_RATECTL_TX_FAILURE,
			    &retrycnt, 0);
			ieee80211_tx_complete(meta->mt_ni, meta->mt_m, 0);
			meta->mt_ni = NULL;
			meta->mt_m = NULL;
		} else
			KASSERT(meta->mt_m == NULL,
			    ("%s:%d: fail", __func__, __LINE__));

		dr->dr_usedslot--;
		if (meta->mt_islast)
			break;
		slot = bwn_dma_nextslot(dr, slot);
	}
	sc->sc_watchdog_timer = 0;
	if (dr->dr_stop) {
		KASSERT(bwn_dma_freeslot(dr) >= BWN_TX_SLOTS_PER_FRAME,
		    ("%s:%d: fail", __func__, __LINE__));
		dr->dr_stop = 0;
	}
}

static void
bwn_pio_handle_txeof(struct bwn_mac *mac,
    const struct bwn_txstatus *status)
{
	struct bwn_pio_txqueue *tq;
	struct bwn_pio_txpkt *tp = NULL;
	struct bwn_softc *sc = mac->mac_sc;
	int retrycnt = 0;

	BWN_ASSERT_LOCKED(sc);

	tq = bwn_pio_parse_cookie(mac, status->cookie, &tp);
	if (tq == NULL)
		return;

	tq->tq_used -= roundup(tp->tp_m->m_pkthdr.len + BWN_HDRSIZE(mac), 4);
	tq->tq_free++;

	if (tp->tp_ni != NULL) {
		/*
		 * Do any tx complete callback.  Note this must
		 * be done before releasing the node reference.
		 */

		/*
		 * If we don't get an ACK, then we should log the
		 * full framecnt.  That may be 0 if it's a PHY
		 * failure, so ensure that gets logged as some
		 * retry attempt.
		 */
		if (status->ack) {
			retrycnt = status->framecnt - 1;
		} else {
			retrycnt = status->framecnt;
			if (retrycnt == 0)
				retrycnt = 1;
		}
		ieee80211_ratectl_tx_complete(tp->tp_ni->ni_vap, tp->tp_ni,
		    status->ack ?
		      IEEE80211_RATECTL_TX_SUCCESS :
		      IEEE80211_RATECTL_TX_FAILURE,
		    &retrycnt, 0);

		if (tp->tp_m->m_flags & M_TXCB)
			ieee80211_process_callback(tp->tp_ni, tp->tp_m, 0);
		ieee80211_free_node(tp->tp_ni);
		tp->tp_ni = NULL;
	}
	m_freem(tp->tp_m);
	tp->tp_m = NULL;
	TAILQ_INSERT_TAIL(&tq->tq_pktlist, tp, tp_list);

	sc->sc_watchdog_timer = 0;
}

static void
bwn_phy_txpower_check(struct bwn_mac *mac, uint32_t flags)
{
	struct bwn_softc *sc = mac->mac_sc;
	struct bwn_phy *phy = &mac->mac_phy;
	struct ieee80211com *ic = &sc->sc_ic;
	unsigned long now;
	bwn_txpwr_result_t result;

	BWN_GETTIME(now);

	if (!(flags & BWN_TXPWR_IGNORE_TIME) && ieee80211_time_before(now, phy->nexttime))
		return;
	phy->nexttime = now + 2 * 1000;

	if (siba_get_pci_subvendor(sc->sc_dev) == SIBA_BOARDVENDOR_BCM &&
	    siba_get_pci_subdevice(sc->sc_dev) == SIBA_BOARD_BU4306)
		return;

	if (phy->recalc_txpwr != NULL) {
		result = phy->recalc_txpwr(mac,
		    (flags & BWN_TXPWR_IGNORE_TSSI) ? 1 : 0);
		if (result == BWN_TXPWR_RES_DONE)
			return;
		KASSERT(result == BWN_TXPWR_RES_NEED_ADJUST,
		    ("%s: fail", __func__));
		KASSERT(phy->set_txpwr != NULL, ("%s: fail", __func__));

		ieee80211_runtask(ic, &mac->mac_txpower);
	}
}

static uint16_t
bwn_pio_rx_read_2(struct bwn_pio_rxqueue *prq, uint16_t offset)
{

	return (BWN_READ_2(prq->prq_mac, prq->prq_base + offset));
}

static uint32_t
bwn_pio_rx_read_4(struct bwn_pio_rxqueue *prq, uint16_t offset)
{

	return (BWN_READ_4(prq->prq_mac, prq->prq_base + offset));
}

static void
bwn_pio_rx_write_2(struct bwn_pio_rxqueue *prq, uint16_t offset, uint16_t value)
{

	BWN_WRITE_2(prq->prq_mac, prq->prq_base + offset, value);
}

static void
bwn_pio_rx_write_4(struct bwn_pio_rxqueue *prq, uint16_t offset, uint32_t value)
{

	BWN_WRITE_4(prq->prq_mac, prq->prq_base + offset, value);
}

static int
bwn_ieeerate2hwrate(struct bwn_softc *sc, int rate)
{

	switch (rate) {
	/* OFDM rates (cf IEEE Std 802.11a-1999, pp. 14 Table 80) */
	case 12:
		return (BWN_OFDM_RATE_6MB);
	case 18:
		return (BWN_OFDM_RATE_9MB);
	case 24:
		return (BWN_OFDM_RATE_12MB);
	case 36:
		return (BWN_OFDM_RATE_18MB);
	case 48:
		return (BWN_OFDM_RATE_24MB);
	case 72:
		return (BWN_OFDM_RATE_36MB);
	case 96:
		return (BWN_OFDM_RATE_48MB);
	case 108:
		return (BWN_OFDM_RATE_54MB);
	/* CCK rates (NB: not IEEE std, device-specific) */
	case 2:
		return (BWN_CCK_RATE_1MB);
	case 4:
		return (BWN_CCK_RATE_2MB);
	case 11:
		return (BWN_CCK_RATE_5MB);
	case 22:
		return (BWN_CCK_RATE_11MB);
	}

	device_printf(sc->sc_dev, "unsupported rate %d\n", rate);
	return (BWN_CCK_RATE_1MB);
}

static uint16_t
bwn_set_txhdr_phyctl1(struct bwn_mac *mac, uint8_t bitrate)
{
	struct bwn_phy *phy = &mac->mac_phy;
	uint16_t control = 0;
	uint16_t bw;

	/* XXX TODO: this is for LP phy, what about N-PHY, etc? */
	bw = BWN_TXH_PHY1_BW_20;

	if (BWN_ISCCKRATE(bitrate) && phy->type != BWN_PHYTYPE_LP) {
		control = bw;
	} else {
		control = bw;
		/* Figure out coding rate and modulation */
		/* XXX TODO: table-ize, for MCS transmit */
		/* Note: this is BWN_*_RATE values */
		switch (bitrate) {
		case BWN_CCK_RATE_1MB:
			control |= 0;
			break;
		case BWN_CCK_RATE_2MB:
			control |= 1;
			break;
		case BWN_CCK_RATE_5MB:
			control |= 2;
			break;
		case BWN_CCK_RATE_11MB:
			control |= 3;
			break;
		case BWN_OFDM_RATE_6MB:
			control |= BWN_TXH_PHY1_CRATE_1_2;
			control |= BWN_TXH_PHY1_MODUL_BPSK;
			break;
		case BWN_OFDM_RATE_9MB:
			control |= BWN_TXH_PHY1_CRATE_3_4;
			control |= BWN_TXH_PHY1_MODUL_BPSK;
			break;
		case BWN_OFDM_RATE_12MB:
			control |= BWN_TXH_PHY1_CRATE_1_2;
			control |= BWN_TXH_PHY1_MODUL_QPSK;
			break;
		case BWN_OFDM_RATE_18MB:
			control |= BWN_TXH_PHY1_CRATE_3_4;
			control |= BWN_TXH_PHY1_MODUL_QPSK;
			break;
		case BWN_OFDM_RATE_24MB:
			control |= BWN_TXH_PHY1_CRATE_1_2;
			control |= BWN_TXH_PHY1_MODUL_QAM16;
			break;
		case BWN_OFDM_RATE_36MB:
			control |= BWN_TXH_PHY1_CRATE_3_4;
			control |= BWN_TXH_PHY1_MODUL_QAM16;
			break;
		case BWN_OFDM_RATE_48MB:
			control |= BWN_TXH_PHY1_CRATE_1_2;
			control |= BWN_TXH_PHY1_MODUL_QAM64;
			break;
		case BWN_OFDM_RATE_54MB:
			control |= BWN_TXH_PHY1_CRATE_3_4;
			control |= BWN_TXH_PHY1_MODUL_QAM64;
			break;
		default:
			break;
		}
		control |= BWN_TXH_PHY1_MODE_SISO;
	}

	return control;
}

static int
bwn_set_txhdr(struct bwn_mac *mac, struct ieee80211_node *ni,
    struct mbuf *m, struct bwn_txhdr *txhdr, uint16_t cookie)
{
	const struct bwn_phy *phy = &mac->mac_phy;
	struct bwn_softc *sc = mac->mac_sc;
	struct ieee80211_frame *wh;
	struct ieee80211_frame *protwh;
	struct ieee80211_frame_cts *cts;
	struct ieee80211_frame_rts *rts;
	const struct ieee80211_txparam *tp;
	struct ieee80211vap *vap = ni->ni_vap;
	struct ieee80211com *ic = &sc->sc_ic;
	struct mbuf *mprot;
	unsigned int len;
	uint32_t macctl = 0;
	int protdur, rts_rate, rts_rate_fb, ismcast, isshort, rix, type;
	uint16_t phyctl = 0;
	uint8_t rate, rate_fb;
	int fill_phy_ctl1 = 0;

	wh = mtod(m, struct ieee80211_frame *);
	memset(txhdr, 0, sizeof(*txhdr));

	type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK;
	ismcast = IEEE80211_IS_MULTICAST(wh->i_addr1);
	isshort = (ic->ic_flags & IEEE80211_F_SHPREAMBLE) != 0;

	if ((phy->type == BWN_PHYTYPE_N) || (phy->type == BWN_PHYTYPE_LP)
	    || (phy->type == BWN_PHYTYPE_HT))
		fill_phy_ctl1 = 1;

	/*
	 * Find TX rate
	 */
	tp = &vap->iv_txparms[ieee80211_chan2mode(ic->ic_curchan)];
	if (type != IEEE80211_FC0_TYPE_DATA || (m->m_flags & M_EAPOL))
		rate = rate_fb = tp->mgmtrate;
	else if (ismcast)
		rate = rate_fb = tp->mcastrate;
	else if (tp->ucastrate != IEEE80211_FIXED_RATE_NONE)
		rate = rate_fb = tp->ucastrate;
	else {
		/* XXX TODO: don't fall back to CCK rates for OFDM */
		rix = ieee80211_ratectl_rate(ni, NULL, 0);
		rate = ni->ni_txrate;

		if (rix > 0)
			rate_fb = ni->ni_rates.rs_rates[rix - 1] &
			    IEEE80211_RATE_VAL;
		else
			rate_fb = rate;
	}

	sc->sc_tx_rate = rate;

	/* Note: this maps the select ieee80211 rate to hardware rate */
	rate = bwn_ieeerate2hwrate(sc, rate);
	rate_fb = bwn_ieeerate2hwrate(sc, rate_fb);

	txhdr->phyrate = (BWN_ISOFDMRATE(rate)) ? bwn_plcp_getofdm(rate) :
	    bwn_plcp_getcck(rate);
	bcopy(wh->i_fc, txhdr->macfc, sizeof(txhdr->macfc));
	bcopy(wh->i_addr1, txhdr->addr1, IEEE80211_ADDR_LEN);

	/* XXX rate/rate_fb is the hardware rate */
	if ((rate_fb == rate) ||
	    (*(u_int16_t *)wh->i_dur & htole16(0x8000)) ||
	    (*(u_int16_t *)wh->i_dur == htole16(0)))
		txhdr->dur_fb = *(u_int16_t *)wh->i_dur;
	else
		txhdr->dur_fb = ieee80211_compute_duration(ic->ic_rt,
		    m->m_pkthdr.len, rate, isshort);

	/* XXX TX encryption */
	bwn_plcp_genhdr(BWN_ISOLDFMT(mac) ?
	    (struct bwn_plcp4 *)(&txhdr->body.old.plcp) :
	    (struct bwn_plcp4 *)(&txhdr->body.new.plcp),
	    m->m_pkthdr.len + IEEE80211_CRC_LEN, rate);
	bwn_plcp_genhdr((struct bwn_plcp4 *)(&txhdr->plcp_fb),
	    m->m_pkthdr.len + IEEE80211_CRC_LEN, rate_fb);

	txhdr->eftypes |= (BWN_ISOFDMRATE(rate_fb)) ? BWN_TX_EFT_FB_OFDM :
	    BWN_TX_EFT_FB_CCK;
	txhdr->chan = phy->chan;
	phyctl |= (BWN_ISOFDMRATE(rate)) ? BWN_TX_PHY_ENC_OFDM :
	    BWN_TX_PHY_ENC_CCK;
	/* XXX preamble? obey net80211 */
	if (isshort && (rate == BWN_CCK_RATE_2MB || rate == BWN_CCK_RATE_5MB ||
	     rate == BWN_CCK_RATE_11MB))
		phyctl |= BWN_TX_PHY_SHORTPRMBL;

	if (! phy->gmode)
		macctl |= BWN_TX_MAC_5GHZ;

	/* XXX TX antenna selection */

	switch (bwn_antenna_sanitize(mac, 0)) {
	case 0:
		phyctl |= BWN_TX_PHY_ANT01AUTO;
		break;
	case 1:
		phyctl |= BWN_TX_PHY_ANT0;
		break;
	case 2:
		phyctl |= BWN_TX_PHY_ANT1;
		break;
	case 3:
		phyctl |= BWN_TX_PHY_ANT2;
		break;
	case 4:
		phyctl |= BWN_TX_PHY_ANT3;
		break;
	default:
		KASSERT(0 == 1, ("%s:%d: fail", __func__, __LINE__));
	}

	if (!ismcast)
		macctl |= BWN_TX_MAC_ACK;

	macctl |= (BWN_TX_MAC_HWSEQ | BWN_TX_MAC_START_MSDU);
	if (!IEEE80211_IS_MULTICAST(wh->i_addr1) &&
	    m->m_pkthdr.len + IEEE80211_CRC_LEN > vap->iv_rtsthreshold)
		macctl |= BWN_TX_MAC_LONGFRAME;

	if (ic->ic_flags & IEEE80211_F_USEPROT) {
		/* XXX RTS rate is always 1MB??? */
		/* XXX TODO: don't fall back to CCK rates for OFDM */
		rts_rate = BWN_CCK_RATE_1MB;
		rts_rate_fb = bwn_get_fbrate(rts_rate);

		/* XXX 'rate' here is hardware rate now, not the net80211 rate */
		protdur = ieee80211_compute_duration(ic->ic_rt,
		    m->m_pkthdr.len, rate, isshort) +
		    + ieee80211_ack_duration(ic->ic_rt, rate, isshort);

		if (ic->ic_protmode == IEEE80211_PROT_CTSONLY) {
			cts = (struct ieee80211_frame_cts *)(BWN_ISOLDFMT(mac) ?
			    (txhdr->body.old.rts_frame) :
			    (txhdr->body.new.rts_frame));
			mprot = ieee80211_alloc_cts(ic, ni->ni_vap->iv_myaddr,
			    protdur);
			KASSERT(mprot != NULL, ("failed to alloc mbuf\n"));
			bcopy(mtod(mprot, uint8_t *), (uint8_t *)cts,
			    mprot->m_pkthdr.len);
			m_freem(mprot);
			macctl |= BWN_TX_MAC_SEND_CTSTOSELF;
			len = sizeof(struct ieee80211_frame_cts);
		} else {
			rts = (struct ieee80211_frame_rts *)(BWN_ISOLDFMT(mac) ?
			    (txhdr->body.old.rts_frame) :
			    (txhdr->body.new.rts_frame));
			/* XXX rate/rate_fb is the hardware rate */
			protdur += ieee80211_ack_duration(ic->ic_rt, rate,
			    isshort);
			mprot = ieee80211_alloc_rts(ic, wh->i_addr1,
			    wh->i_addr2, protdur);
			KASSERT(mprot != NULL, ("failed to alloc mbuf\n"));
			bcopy(mtod(mprot, uint8_t *), (uint8_t *)rts,
			    mprot->m_pkthdr.len);
			m_freem(mprot);
			macctl |= BWN_TX_MAC_SEND_RTSCTS;
			len = sizeof(struct ieee80211_frame_rts);
		}
		len += IEEE80211_CRC_LEN;
		bwn_plcp_genhdr((struct bwn_plcp4 *)((BWN_ISOLDFMT(mac)) ?
		    &txhdr->body.old.rts_plcp :
		    &txhdr->body.new.rts_plcp), len, rts_rate);
		bwn_plcp_genhdr((struct bwn_plcp4 *)&txhdr->rts_plcp_fb, len,
		    rts_rate_fb);

		protwh = (struct ieee80211_frame *)(BWN_ISOLDFMT(mac) ?
		    (&txhdr->body.old.rts_frame) :
		    (&txhdr->body.new.rts_frame));
		txhdr->rts_dur_fb = *(u_int16_t *)protwh->i_dur;

		if (BWN_ISOFDMRATE(rts_rate)) {
			txhdr->eftypes |= BWN_TX_EFT_RTS_OFDM;
			txhdr->phyrate_rts = bwn_plcp_getofdm(rts_rate);
		} else {
			txhdr->eftypes |= BWN_TX_EFT_RTS_CCK;
			txhdr->phyrate_rts = bwn_plcp_getcck(rts_rate);
		}
		txhdr->eftypes |= (BWN_ISOFDMRATE(rts_rate_fb)) ?
		    BWN_TX_EFT_RTS_FBOFDM : BWN_TX_EFT_RTS_FBCCK;

		if (fill_phy_ctl1) {
			txhdr->phyctl_1rts = htole16(bwn_set_txhdr_phyctl1(mac, rts_rate));
			txhdr->phyctl_1rtsfb = htole16(bwn_set_txhdr_phyctl1(mac, rts_rate_fb));
		}
	}

	if (fill_phy_ctl1) {
		txhdr->phyctl_1 = htole16(bwn_set_txhdr_phyctl1(mac, rate));
		txhdr->phyctl_1fb = htole16(bwn_set_txhdr_phyctl1(mac, rate_fb));
	}

	if (BWN_ISOLDFMT(mac))
		txhdr->body.old.cookie = htole16(cookie);
	else
		txhdr->body.new.cookie = htole16(cookie);

	txhdr->macctl = htole32(macctl);
	txhdr->phyctl = htole16(phyctl);

	/*
	 * TX radio tap
	 */
	if (ieee80211_radiotap_active_vap(vap)) {
		sc->sc_tx_th.wt_flags = 0;
		if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED)
			sc->sc_tx_th.wt_flags |= IEEE80211_RADIOTAP_F_WEP;
		if (isshort &&
		    (rate == BWN_CCK_RATE_2MB || rate == BWN_CCK_RATE_5MB ||
		     rate == BWN_CCK_RATE_11MB))
			sc->sc_tx_th.wt_flags |= IEEE80211_RADIOTAP_F_SHORTPRE;
		sc->sc_tx_th.wt_rate = rate;

		ieee80211_radiotap_tx(vap, m);
	}

	return (0);
}

static void
bwn_plcp_genhdr(struct bwn_plcp4 *plcp, const uint16_t octets,
    const uint8_t rate)
{
	uint32_t d, plen;
	uint8_t *raw = plcp->o.raw;

	if (BWN_ISOFDMRATE(rate)) {
		d = bwn_plcp_getofdm(rate);
		KASSERT(!(octets & 0xf000),
		    ("%s:%d: fail", __func__, __LINE__));
		d |= (octets << 5);
		plcp->o.data = htole32(d);
	} else {
		plen = octets * 16 / rate;
		if ((octets * 16 % rate) > 0) {
			plen++;
			if ((rate == BWN_CCK_RATE_11MB)
			    && ((octets * 8 % 11) < 4)) {
				raw[1] = 0x84;
			} else
				raw[1] = 0x04;
		} else
			raw[1] = 0x04;
		plcp->o.data |= htole32(plen << 16);
		raw[0] = bwn_plcp_getcck(rate);
	}
}

static uint8_t
bwn_antenna_sanitize(struct bwn_mac *mac, uint8_t n)
{
	struct bwn_softc *sc = mac->mac_sc;
	uint8_t mask;

	if (n == 0)
		return (0);
	if (mac->mac_phy.gmode)
		mask = siba_sprom_get_ant_bg(sc->sc_dev);
	else
		mask = siba_sprom_get_ant_a(sc->sc_dev);
	if (!(mask & (1 << (n - 1))))
		return (0);
	return (n);
}

/*
 * Return a fallback rate for the given rate.
 *
 * Note: Don't fall back from OFDM to CCK.
 */
static uint8_t
bwn_get_fbrate(uint8_t bitrate)
{
	switch (bitrate) {
	/* CCK */
	case BWN_CCK_RATE_1MB:
		return (BWN_CCK_RATE_1MB);
	case BWN_CCK_RATE_2MB:
		return (BWN_CCK_RATE_1MB);
	case BWN_CCK_RATE_5MB:
		return (BWN_CCK_RATE_2MB);
	case BWN_CCK_RATE_11MB:
		return (BWN_CCK_RATE_5MB);

	/* OFDM */
	case BWN_OFDM_RATE_6MB:
		return (BWN_OFDM_RATE_6MB);
	case BWN_OFDM_RATE_9MB:
		return (BWN_OFDM_RATE_6MB);
	case BWN_OFDM_RATE_12MB:
		return (BWN_OFDM_RATE_9MB);
	case BWN_OFDM_RATE_18MB:
		return (BWN_OFDM_RATE_12MB);
	case BWN_OFDM_RATE_24MB:
		return (BWN_OFDM_RATE_18MB);
	case BWN_OFDM_RATE_36MB:
		return (BWN_OFDM_RATE_24MB);
	case BWN_OFDM_RATE_48MB:
		return (BWN_OFDM_RATE_36MB);
	case BWN_OFDM_RATE_54MB:
		return (BWN_OFDM_RATE_48MB);
	}
	KASSERT(0 == 1, ("%s:%d: fail", __func__, __LINE__));
	return (0);
}

static uint32_t
bwn_pio_write_multi_4(struct bwn_mac *mac, struct bwn_pio_txqueue *tq,
    uint32_t ctl, const void *_data, int len)
{
	struct bwn_softc *sc = mac->mac_sc;
	uint32_t value = 0;
	const uint8_t *data = _data;

	ctl |= BWN_PIO8_TXCTL_0_7 | BWN_PIO8_TXCTL_8_15 |
	    BWN_PIO8_TXCTL_16_23 | BWN_PIO8_TXCTL_24_31;
	bwn_pio_write_4(mac, tq, BWN_PIO8_TXCTL, ctl);

	siba_write_multi_4(sc->sc_dev, data, (len & ~3),
	    tq->tq_base + BWN_PIO8_TXDATA);
	if (len & 3) {
		ctl &= ~(BWN_PIO8_TXCTL_8_15 | BWN_PIO8_TXCTL_16_23 |
		    BWN_PIO8_TXCTL_24_31);
		data = &(data[len - 1]);
		switch (len & 3) {
		case 3:
			ctl |= BWN_PIO8_TXCTL_16_23;
			value |= (uint32_t)(*data) << 16;
			data--;
		case 2:
			ctl |= BWN_PIO8_TXCTL_8_15;
			value |= (uint32_t)(*data) << 8;
			data--;
		case 1:
			value |= (uint32_t)(*data);
		}
		bwn_pio_write_4(mac, tq, BWN_PIO8_TXCTL, ctl);
		bwn_pio_write_4(mac, tq, BWN_PIO8_TXDATA, value);
	}

	return (ctl);
}

static void
bwn_pio_write_4(struct bwn_mac *mac, struct bwn_pio_txqueue *tq,
    uint16_t offset, uint32_t value)
{

	BWN_WRITE_4(mac, tq->tq_base + offset, value);
}

static uint16_t
bwn_pio_write_multi_2(struct bwn_mac *mac, struct bwn_pio_txqueue *tq,
    uint16_t ctl, const void *_data, int len)
{
	struct bwn_softc *sc = mac->mac_sc;
	const uint8_t *data = _data;

	ctl |= BWN_PIO_TXCTL_WRITELO | BWN_PIO_TXCTL_WRITEHI;
	BWN_PIO_WRITE_2(mac, tq, BWN_PIO_TXCTL, ctl);

	siba_write_multi_2(sc->sc_dev, data, (len & ~1),
	    tq->tq_base + BWN_PIO_TXDATA);
	if (len & 1) {
		ctl &= ~BWN_PIO_TXCTL_WRITEHI;
		BWN_PIO_WRITE_2(mac, tq, BWN_PIO_TXCTL, ctl);
		BWN_PIO_WRITE_2(mac, tq, BWN_PIO_TXDATA, data[len - 1]);
	}

	return (ctl);
}

static uint16_t
bwn_pio_write_mbuf_2(struct bwn_mac *mac, struct bwn_pio_txqueue *tq,
    uint16_t ctl, struct mbuf *m0)
{
	int i, j = 0;
	uint16_t data = 0;
	const uint8_t *buf;
	struct mbuf *m = m0;

	ctl |= BWN_PIO_TXCTL_WRITELO | BWN_PIO_TXCTL_WRITEHI;
	BWN_PIO_WRITE_2(mac, tq, BWN_PIO_TXCTL, ctl);

	for (; m != NULL; m = m->m_next) {
		buf = mtod(m, const uint8_t *);
		for (i = 0; i < m->m_len; i++) {
			if (!((j++) % 2))
				data |= buf[i];
			else {
				data |= (buf[i] << 8);
				BWN_PIO_WRITE_2(mac, tq, BWN_PIO_TXDATA, data);
				data = 0;
			}
		}
	}
	if (m0->m_pkthdr.len % 2) {
		ctl &= ~BWN_PIO_TXCTL_WRITEHI;
		BWN_PIO_WRITE_2(mac, tq, BWN_PIO_TXCTL, ctl);
		BWN_PIO_WRITE_2(mac, tq, BWN_PIO_TXDATA, data);
	}

	return (ctl);
}

static void
bwn_set_slot_time(struct bwn_mac *mac, uint16_t time)
{

	/* XXX should exit if 5GHz band .. */
	if (mac->mac_phy.type != BWN_PHYTYPE_G)
		return;

	BWN_WRITE_2(mac, 0x684, 510 + time);
	/* Disabled in Linux b43, can adversely effect performance */
#if 0
	bwn_shm_write_2(mac, BWN_SHARED, 0x0010, time);
#endif
}

static struct bwn_dma_ring *
bwn_dma_select(struct bwn_mac *mac, uint8_t prio)
{

	if ((mac->mac_flags & BWN_MAC_FLAG_WME) == 0)
		return (mac->mac_method.dma.wme[WME_AC_BE]);

	switch (prio) {
	case 3:
		return (mac->mac_method.dma.wme[WME_AC_VO]);
	case 2:
		return (mac->mac_method.dma.wme[WME_AC_VI]);
	case 0:
		return (mac->mac_method.dma.wme[WME_AC_BE]);
	case 1:
		return (mac->mac_method.dma.wme[WME_AC_BK]);
	}
	KASSERT(0 == 1, ("%s:%d: fail", __func__, __LINE__));
	return (NULL);
}

static int
bwn_dma_getslot(struct bwn_dma_ring *dr)
{
	int slot;

	BWN_ASSERT_LOCKED(dr->dr_mac->mac_sc);

	KASSERT(dr->dr_tx, ("%s:%d: fail", __func__, __LINE__));
	KASSERT(!(dr->dr_stop), ("%s:%d: fail", __func__, __LINE__));
	KASSERT(bwn_dma_freeslot(dr) != 0, ("%s:%d: fail", __func__, __LINE__));

	slot = bwn_dma_nextslot(dr, dr->dr_curslot);
	KASSERT(!(slot & ~0x0fff), ("%s:%d: fail", __func__, __LINE__));
	dr->dr_curslot = slot;
	dr->dr_usedslot++;

	return (slot);
}

static struct bwn_pio_txqueue *
bwn_pio_parse_cookie(struct bwn_mac *mac, uint16_t cookie,
    struct bwn_pio_txpkt **pack)
{
	struct bwn_pio *pio = &mac->mac_method.pio;
	struct bwn_pio_txqueue *tq = NULL;
	unsigned int index;

	switch (cookie & 0xf000) {
	case 0x1000:
		tq = &pio->wme[WME_AC_BK];
		break;
	case 0x2000:
		tq = &pio->wme[WME_AC_BE];
		break;
	case 0x3000:
		tq = &pio->wme[WME_AC_VI];
		break;
	case 0x4000:
		tq = &pio->wme[WME_AC_VO];
		break;
	case 0x5000:
		tq = &pio->mcast;
		break;
	}
	KASSERT(tq != NULL, ("%s:%d: fail", __func__, __LINE__));
	if (tq == NULL)
		return (NULL);
	index = (cookie & 0x0fff);
	KASSERT(index < N(tq->tq_pkts), ("%s:%d: fail", __func__, __LINE__));
	if (index >= N(tq->tq_pkts))
		return (NULL);
	*pack = &tq->tq_pkts[index];
	KASSERT(*pack != NULL, ("%s:%d: fail", __func__, __LINE__));
	return (tq);
}

static void
bwn_txpwr(void *arg, int npending)
{
	struct bwn_mac *mac = arg;
	struct bwn_softc *sc = mac->mac_sc;

	BWN_LOCK(sc);
	if (mac && mac->mac_status >= BWN_MAC_STATUS_STARTED &&
	    mac->mac_phy.set_txpwr != NULL)
		mac->mac_phy.set_txpwr(mac);
	BWN_UNLOCK(sc);
}

static void
bwn_task_15s(struct bwn_mac *mac)
{
	uint16_t reg;

	if (mac->mac_fw.opensource) {
		reg = bwn_shm_read_2(mac, BWN_SCRATCH, BWN_WATCHDOG_REG);
		if (reg) {
			bwn_restart(mac, "fw watchdog");
			return;
		}
		bwn_shm_write_2(mac, BWN_SCRATCH, BWN_WATCHDOG_REG, 1);
	}
	if (mac->mac_phy.task_15s)
		mac->mac_phy.task_15s(mac);

	mac->mac_phy.txerrors = BWN_TXERROR_MAX;
}

static void
bwn_task_30s(struct bwn_mac *mac)
{

	if (mac->mac_phy.type != BWN_PHYTYPE_G || mac->mac_noise.noi_running)
		return;
	mac->mac_noise.noi_running = 1;
	mac->mac_noise.noi_nsamples = 0;

	bwn_noise_gensample(mac);
}

static void
bwn_task_60s(struct bwn_mac *mac)
{

	if (mac->mac_phy.task_60s)
		mac->mac_phy.task_60s(mac);
	bwn_phy_txpower_check(mac, BWN_TXPWR_IGNORE_TIME);
}

static void
bwn_tasks(void *arg)
{
	struct bwn_mac *mac = arg;
	struct bwn_softc *sc = mac->mac_sc;

	BWN_ASSERT_LOCKED(sc);
	if (mac->mac_status != BWN_MAC_STATUS_STARTED)
		return;

	if (mac->mac_task_state % 4 == 0)
		bwn_task_60s(mac);
	if (mac->mac_task_state % 2 == 0)
		bwn_task_30s(mac);
	bwn_task_15s(mac);

	mac->mac_task_state++;
	callout_reset(&sc->sc_task_ch, hz * 15, bwn_tasks, mac);
}

static int
bwn_plcp_get_ofdmrate(struct bwn_mac *mac, struct bwn_plcp6 *plcp, uint8_t a)
{
	struct bwn_softc *sc = mac->mac_sc;

	KASSERT(a == 0, ("not support APHY\n"));

	switch (plcp->o.raw[0] & 0xf) {
	case 0xb:
		return (BWN_OFDM_RATE_6MB);
	case 0xf:
		return (BWN_OFDM_RATE_9MB);
	case 0xa:
		return (BWN_OFDM_RATE_12MB);
	case 0xe:
		return (BWN_OFDM_RATE_18MB);
	case 0x9:
		return (BWN_OFDM_RATE_24MB);
	case 0xd:
		return (BWN_OFDM_RATE_36MB);
	case 0x8:
		return (BWN_OFDM_RATE_48MB);
	case 0xc:
		return (BWN_OFDM_RATE_54MB);
	}
	device_printf(sc->sc_dev, "incorrect OFDM rate %d\n",
	    plcp->o.raw[0] & 0xf);
	return (-1);
}

static int
bwn_plcp_get_cckrate(struct bwn_mac *mac, struct bwn_plcp6 *plcp)
{
	struct bwn_softc *sc = mac->mac_sc;

	switch (plcp->o.raw[0]) {
	case 0x0a:
		return (BWN_CCK_RATE_1MB);
	case 0x14:
		return (BWN_CCK_RATE_2MB);
	case 0x37:
		return (BWN_CCK_RATE_5MB);
	case 0x6e:
		return (BWN_CCK_RATE_11MB);
	}
	device_printf(sc->sc_dev, "incorrect CCK rate %d\n", plcp->o.raw[0]);
	return (-1);
}

static void
bwn_rx_radiotap(struct bwn_mac *mac, struct mbuf *m,
    const struct bwn_rxhdr4 *rxhdr, struct bwn_plcp6 *plcp, int rate,
    int rssi, int noise)
{
	struct bwn_softc *sc = mac->mac_sc;
	const struct ieee80211_frame_min *wh;
	uint64_t tsf;
	uint16_t low_mactime_now;

	if (htole16(rxhdr->phy_status0) & BWN_RX_PHYST0_SHORTPRMBL)
		sc->sc_rx_th.wr_flags |= IEEE80211_RADIOTAP_F_SHORTPRE;

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

	bwn_tsf_read(mac, &tsf);
	low_mactime_now = tsf;
	tsf = tsf & ~0xffffULL;
	tsf += le16toh(rxhdr->mac_time);
	if (low_mactime_now < le16toh(rxhdr->mac_time))
		tsf -= 0x10000;

	sc->sc_rx_th.wr_tsf = tsf;
	sc->sc_rx_th.wr_rate = rate;
	sc->sc_rx_th.wr_antsignal = rssi;
	sc->sc_rx_th.wr_antnoise = noise;
}

static void
bwn_tsf_read(struct bwn_mac *mac, uint64_t *tsf)
{
	uint32_t low, high;

	KASSERT(siba_get_revid(mac->mac_sc->sc_dev) >= 3,
	    ("%s:%d: fail", __func__, __LINE__));

	low = BWN_READ_4(mac, BWN_REV3PLUS_TSF_LOW);
	high = BWN_READ_4(mac, BWN_REV3PLUS_TSF_HIGH);
	*tsf = high;
	*tsf <<= 32;
	*tsf |= low;
}

static int
bwn_dma_attach(struct bwn_mac *mac)
{
	struct bwn_dma *dma = &mac->mac_method.dma;
	struct bwn_softc *sc = mac->mac_sc;
	bus_addr_t lowaddr = 0;
	int error;

	if (siba_get_type(sc->sc_dev) == SIBA_TYPE_PCMCIA || bwn_usedma == 0)
		return (0);

	KASSERT(siba_get_revid(sc->sc_dev) >= 5, ("%s: fail", __func__));

	mac->mac_flags |= BWN_MAC_FLAG_DMA;

	dma->dmatype = bwn_dma_gettype(mac);
	if (dma->dmatype == BWN_DMA_30BIT)
		lowaddr = BWN_BUS_SPACE_MAXADDR_30BIT;
	else if (dma->dmatype == BWN_DMA_32BIT)
		lowaddr = BUS_SPACE_MAXADDR_32BIT;
	else
		lowaddr = BUS_SPACE_MAXADDR;

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

	/*
	 * Create TX/RX mbuf DMA tag
	 */
	error = bus_dma_tag_create(dma->parent_dtag,
				1,
				0,
				BUS_SPACE_MAXADDR,
				BUS_SPACE_MAXADDR,
				NULL, NULL,
				MCLBYTES,
				1,
				BUS_SPACE_MAXSIZE_32BIT,
				0,
				NULL, NULL,
				&dma->rxbuf_dtag);
	if (error) {
		device_printf(sc->sc_dev, "can't create mbuf DMA tag\n");
		goto fail0;
	}
	error = bus_dma_tag_create(dma->parent_dtag,
				1,
				0,
				BUS_SPACE_MAXADDR,
				BUS_SPACE_MAXADDR,
				NULL, NULL,
				MCLBYTES,
				1,
				BUS_SPACE_MAXSIZE_32BIT,
				0,
				NULL, NULL,
				&dma->txbuf_dtag);
	if (error) {
		device_printf(sc->sc_dev, "can't create mbuf DMA tag\n");
		goto fail1;
	}

	dma->wme[WME_AC_BK] = bwn_dma_ringsetup(mac, 0, 1, dma->dmatype);
	if (!dma->wme[WME_AC_BK])
		goto fail2;

	dma->wme[WME_AC_BE] = bwn_dma_ringsetup(mac, 1, 1, dma->dmatype);
	if (!dma->wme[WME_AC_BE])
		goto fail3;

	dma->wme[WME_AC_VI] = bwn_dma_ringsetup(mac, 2, 1, dma->dmatype);
	if (!dma->wme[WME_AC_VI])
		goto fail4;

	dma->wme[WME_AC_VO] = bwn_dma_ringsetup(mac, 3, 1, dma->dmatype);
	if (!dma->wme[WME_AC_VO])
		goto fail5;

	dma->mcast = bwn_dma_ringsetup(mac, 4, 1, dma->dmatype);
	if (!dma->mcast)
		goto fail6;
	dma->rx = bwn_dma_ringsetup(mac, 0, 0, dma->dmatype);
	if (!dma->rx)
		goto fail7;

	return (error);

fail7:	bwn_dma_ringfree(&dma->mcast);
fail6:	bwn_dma_ringfree(&dma->wme[WME_AC_VO]);
fail5:	bwn_dma_ringfree(&dma->wme[WME_AC_VI]);
fail4:	bwn_dma_ringfree(&dma->wme[WME_AC_BE]);
fail3:	bwn_dma_ringfree(&dma->wme[WME_AC_BK]);
fail2:	bus_dma_tag_destroy(dma->txbuf_dtag);
fail1:	bus_dma_tag_destroy(dma->rxbuf_dtag);
fail0:	bus_dma_tag_destroy(dma->parent_dtag);
	return (error);
}

static struct bwn_dma_ring *
bwn_dma_parse_cookie(struct bwn_mac *mac, const struct bwn_txstatus *status,
    uint16_t cookie, int *slot)
{
	struct bwn_dma *dma = &mac->mac_method.dma;
	struct bwn_dma_ring *dr;
	struct bwn_softc *sc = mac->mac_sc;

	BWN_ASSERT_LOCKED(mac->mac_sc);

	switch (cookie & 0xf000) {
	case 0x1000:
		dr = dma->wme[WME_AC_BK];
		break;
	case 0x2000:
		dr = dma->wme[WME_AC_BE];
		break;
	case 0x3000:
		dr = dma->wme[WME_AC_VI];
		break;
	case 0x4000:
		dr = dma->wme[WME_AC_VO];
		break;
	case 0x5000:
		dr = dma->mcast;
		break;
	default:
		dr = NULL;
		KASSERT(0 == 1,
		    ("invalid cookie value %d", cookie & 0xf000));
	}
	*slot = (cookie & 0x0fff);
	if (*slot < 0 || *slot >= dr->dr_numslots) {
		/*
		 * XXX FIXME: sometimes H/W returns TX DONE events duplicately
		 * that it occurs events which have same H/W sequence numbers.
		 * When it's occurred just prints a WARNING msgs and ignores.
		 */
		KASSERT(status->seq == dma->lastseq,
		    ("%s:%d: fail", __func__, __LINE__));
		device_printf(sc->sc_dev,
		    "out of slot ranges (0 < %d < %d)\n", *slot,
		    dr->dr_numslots);
		return (NULL);
	}
	dma->lastseq = status->seq;
	return (dr);
}

static void
bwn_dma_stop(struct bwn_mac *mac)
{
	struct bwn_dma *dma;

	if ((mac->mac_flags & BWN_MAC_FLAG_DMA) == 0)
		return;
	dma = &mac->mac_method.dma;

	bwn_dma_ringstop(&dma->rx);
	bwn_dma_ringstop(&dma->wme[WME_AC_BK]);
	bwn_dma_ringstop(&dma->wme[WME_AC_BE]);
	bwn_dma_ringstop(&dma->wme[WME_AC_VI]);
	bwn_dma_ringstop(&dma->wme[WME_AC_VO]);
	bwn_dma_ringstop(&dma->mcast);
}

static void
bwn_dma_ringstop(struct bwn_dma_ring **dr)
{

	if (dr == NULL)
		return;

	bwn_dma_cleanup(*dr);
}

static void
bwn_pio_stop(struct bwn_mac *mac)
{
	struct bwn_pio *pio;

	if (mac->mac_flags & BWN_MAC_FLAG_DMA)
		return;
	pio = &mac->mac_method.pio;

	bwn_destroy_queue_tx(&pio->mcast);
	bwn_destroy_queue_tx(&pio->wme[WME_AC_VO]);
	bwn_destroy_queue_tx(&pio->wme[WME_AC_VI]);
	bwn_destroy_queue_tx(&pio->wme[WME_AC_BE]);
	bwn_destroy_queue_tx(&pio->wme[WME_AC_BK]);
}

static void
bwn_led_attach(struct bwn_mac *mac)
{
	struct bwn_softc *sc = mac->mac_sc;
	const uint8_t *led_act = NULL;
	uint16_t val[BWN_LED_MAX];
	int i;

	sc->sc_led_idle = (2350 * hz) / 1000;
	sc->sc_led_blink = 1;

	for (i = 0; i < N(bwn_vendor_led_act); ++i) {
		if (siba_get_pci_subvendor(sc->sc_dev) ==
		    bwn_vendor_led_act[i].vid) {
			led_act = bwn_vendor_led_act[i].led_act;
			break;
		}
	}
	if (led_act == NULL)
		led_act = bwn_default_led_act;

	val[0] = siba_sprom_get_gpio0(sc->sc_dev);
	val[1] = siba_sprom_get_gpio1(sc->sc_dev);
	val[2] = siba_sprom_get_gpio2(sc->sc_dev);
	val[3] = siba_sprom_get_gpio3(sc->sc_dev);

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

		if (val[i] == 0xff) {
			led->led_act = led_act[i];
		} else {
			if (val[i] & BWN_LED_ACT_LOW)
				led->led_flags |= BWN_LED_F_ACTLOW;
			led->led_act = val[i] & BWN_LED_ACT_MASK;
		}
		led->led_mask = (1 << i);

		if (led->led_act == BWN_LED_ACT_BLINK_SLOW ||
		    led->led_act == BWN_LED_ACT_BLINK_POLL ||
		    led->led_act == BWN_LED_ACT_BLINK) {
			led->led_flags |= BWN_LED_F_BLINK;
			if (led->led_act == BWN_LED_ACT_BLINK_POLL)
				led->led_flags |= BWN_LED_F_POLLABLE;
			else if (led->led_act == BWN_LED_ACT_BLINK_SLOW)
				led->led_flags |= BWN_LED_F_SLOW;

			if (sc->sc_blink_led == NULL) {
				sc->sc_blink_led = led;
				if (led->led_flags & BWN_LED_F_SLOW)
					BWN_LED_SLOWDOWN(sc->sc_led_idle);
			}
		}

		DPRINTF(sc, BWN_DEBUG_LED,
		    "%dth led, act %d, lowact %d\n", i,
		    led->led_act, led->led_flags & BWN_LED_F_ACTLOW);
	}
	callout_init_mtx(&sc->sc_led_blink_ch, &sc->sc_mtx, 0);
}

static __inline uint16_t
bwn_led_onoff(const struct bwn_led *led, uint16_t val, int on)
{

	if (led->led_flags & BWN_LED_F_ACTLOW)
		on = !on;
	if (on)
		val |= led->led_mask;
	else
		val &= ~led->led_mask;
	return val;
}

static void
bwn_led_newstate(struct bwn_mac *mac, enum ieee80211_state nstate)
{
	struct bwn_softc *sc = mac->mac_sc;
	struct ieee80211com *ic = &sc->sc_ic;
	uint16_t val;
	int i;

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

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

	val = BWN_READ_2(mac, BWN_GPIO_CONTROL);
	for (i = 0; i < BWN_LED_MAX; ++i) {
		struct bwn_led *led = &sc->sc_leds[i];
		int on;

		if (led->led_act == BWN_LED_ACT_UNKN ||
		    led->led_act == BWN_LED_ACT_NULL)
			continue;

		if ((led->led_flags & BWN_LED_F_BLINK) &&
		    nstate != IEEE80211_S_INIT)
			continue;

		switch (led->led_act) {
		case BWN_LED_ACT_ON:    /* Always on */
			on = 1;
			break;
		case BWN_LED_ACT_OFF:   /* Always off */
		case BWN_LED_ACT_5GHZ:  /* TODO: 11A */
			on = 0;
			break;
		default:
			on = 1;
			switch (nstate) {
			case IEEE80211_S_INIT:
				on = 0;
				break;
			case IEEE80211_S_RUN:
				if (led->led_act == BWN_LED_ACT_11G &&
				    ic->ic_curmode != IEEE80211_MODE_11G)
					on = 0;
				break;
			default:
				if (led->led_act == BWN_LED_ACT_ASSOC)
					on = 0;
				break;
			}
			break;
		}

		val = bwn_led_onoff(led, val, on);
	}
	BWN_WRITE_2(mac, BWN_GPIO_CONTROL, val);
}

static void
bwn_led_event(struct bwn_mac *mac, int event)
{
	struct bwn_softc *sc = mac->mac_sc;
	struct bwn_led *led = sc->sc_blink_led;
	int rate;

	if (event == BWN_LED_EVENT_POLL) {
		if ((led->led_flags & BWN_LED_F_POLLABLE) == 0)
			return;
		if (ticks - sc->sc_led_ticks < sc->sc_led_idle)
			return;
	}

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

	switch (event) {
	case BWN_LED_EVENT_RX:
		rate = sc->sc_rx_rate;
		break;
	case BWN_LED_EVENT_TX:
		rate = sc->sc_tx_rate;
		break;
	case BWN_LED_EVENT_POLL:
		rate = 0;
		break;
	default:
		panic("unknown LED event %d\n", event);
		break;
	}
	bwn_led_blink_start(mac, bwn_led_duration[rate].on_dur,
	    bwn_led_duration[rate].off_dur);
}

static void
bwn_led_blink_start(struct bwn_mac *mac, int on_dur, int off_dur)
{
	struct bwn_softc *sc = mac->mac_sc;
	struct bwn_led *led = sc->sc_blink_led;
	uint16_t val;

	val = BWN_READ_2(mac, BWN_GPIO_CONTROL);
	val = bwn_led_onoff(led, val, 1);
	BWN_WRITE_2(mac, BWN_GPIO_CONTROL, val);

	if (led->led_flags & BWN_LED_F_SLOW) {
		BWN_LED_SLOWDOWN(on_dur);
		BWN_LED_SLOWDOWN(off_dur);
	}

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

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

static void
bwn_led_blink_next(void *arg)
{
	struct bwn_mac *mac = arg;
	struct bwn_softc *sc = mac->mac_sc;
	uint16_t val;

	val = BWN_READ_2(mac, BWN_GPIO_CONTROL);
	val = bwn_led_onoff(sc->sc_blink_led, val, 0);
	BWN_WRITE_2(mac, BWN_GPIO_CONTROL, val);

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

static void
bwn_led_blink_end(void *arg)
{
	struct bwn_mac *mac = arg;
	struct bwn_softc *sc = mac->mac_sc;

	sc->sc_led_blinking = 0;
}

static int
bwn_suspend(device_t dev)
{
	struct bwn_softc *sc = device_get_softc(dev);

	BWN_LOCK(sc);
	bwn_stop(sc);
	BWN_UNLOCK(sc);
	return (0);
}

static int
bwn_resume(device_t dev)
{
	struct bwn_softc *sc = device_get_softc(dev);
	int error = EDOOFUS;

	BWN_LOCK(sc);
	if (sc->sc_ic.ic_nrunning > 0)
		error = bwn_init(sc);
	BWN_UNLOCK(sc);
	if (error == 0)
		ieee80211_start_all(&sc->sc_ic);
	return (0);
}

static void
bwn_rfswitch(void *arg)
{
	struct bwn_softc *sc = arg;
	struct bwn_mac *mac = sc->sc_curmac;
	int cur = 0, prev = 0;

	KASSERT(mac->mac_status >= BWN_MAC_STATUS_STARTED,
	    ("%s: invalid MAC status %d", __func__, mac->mac_status));

	if (mac->mac_phy.rev >= 3 || mac->mac_phy.type == BWN_PHYTYPE_LP
	    || mac->mac_phy.type == BWN_PHYTYPE_N) {
		if (!(BWN_READ_4(mac, BWN_RF_HWENABLED_HI)
			& BWN_RF_HWENABLED_HI_MASK))
			cur = 1;
	} else {
		if (BWN_READ_2(mac, BWN_RF_HWENABLED_LO)
		    & BWN_RF_HWENABLED_LO_MASK)
			cur = 1;
	}

	if (mac->mac_flags & BWN_MAC_FLAG_RADIO_ON)
		prev = 1;

	DPRINTF(sc, BWN_DEBUG_RESET, "%s: called; cur=%d, prev=%d\n",
	    __func__, cur, prev);

	if (cur != prev) {
		if (cur)
			mac->mac_flags |= BWN_MAC_FLAG_RADIO_ON;
		else
			mac->mac_flags &= ~BWN_MAC_FLAG_RADIO_ON;

		device_printf(sc->sc_dev,
		    "status of RF switch is changed to %s\n",
		    cur ? "ON" : "OFF");
		if (cur != mac->mac_phy.rf_on) {
			if (cur)
				bwn_rf_turnon(mac);
			else
				bwn_rf_turnoff(mac);
		}
	}

	callout_schedule(&sc->sc_rfswitch_ch, hz);
}

static void
bwn_sysctl_node(struct bwn_softc *sc)
{
	device_t dev = sc->sc_dev;
	struct bwn_mac *mac;
	struct bwn_stats *stats;

	/* XXX assume that count of MAC is only 1. */

	if ((mac = sc->sc_curmac) == NULL)
		return;
	stats = &mac->mac_stats;

	SYSCTL_ADD_INT(device_get_sysctl_ctx(dev),
	    SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO,
	    "linknoise", CTLFLAG_RW, &stats->rts, 0, "Noise level");
	SYSCTL_ADD_INT(device_get_sysctl_ctx(dev),
	    SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO,
	    "rts", CTLFLAG_RW, &stats->rts, 0, "RTS");
	SYSCTL_ADD_INT(device_get_sysctl_ctx(dev),
	    SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO,
	    "rtsfail", CTLFLAG_RW, &stats->rtsfail, 0, "RTS failed to send");

#ifdef BWN_DEBUG
	SYSCTL_ADD_UINT(device_get_sysctl_ctx(dev),
	    SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO,
	    "debug", CTLFLAG_RW, &sc->sc_debug, 0, "Debug flags");
#endif
}

static device_method_t bwn_methods[] = {
	/* Device interface */
	DEVMETHOD(device_probe,		bwn_probe),
	DEVMETHOD(device_attach,	bwn_attach),
	DEVMETHOD(device_detach,	bwn_detach),
	DEVMETHOD(device_suspend,	bwn_suspend),
	DEVMETHOD(device_resume,	bwn_resume),
	DEVMETHOD_END
};
static driver_t bwn_driver = {
	"bwn",
	bwn_methods,
	sizeof(struct bwn_softc)
};
static devclass_t bwn_devclass;
DRIVER_MODULE(bwn, siba_bwn, bwn_driver, bwn_devclass, 0, 0);
MODULE_DEPEND(bwn, siba_bwn, 1, 1, 1);
MODULE_DEPEND(bwn, wlan, 1, 1, 1);		/* 802.11 media layer */
MODULE_DEPEND(bwn, firmware, 1, 1, 1);		/* firmware support */
MODULE_DEPEND(bwn, wlan_amrr, 1, 1, 1);
MODULE_VERSION(bwn, 1);