/*
 * Copyright (c) 2010 Broadcom Corporation
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
 * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/pci_ids.h>
#include <linux/if_ether.h>
#include <net/cfg80211.h>
#include <net/mac80211.h>
#include <brcm_hw_ids.h>
#include <aiutils.h>
#include <chipcommon.h>
#include "rate.h"
#include "scb.h"
#include "phy/phy_hal.h"
#include "channel.h"
#include "antsel.h"
#include "stf.h"
#include "ampdu.h"
#include "mac80211_if.h"
#include "ucode_loader.h"
#include "main.h"
#include "soc.h"

/*
 * Indication for txflowcontrol that all priority bits in
 * TXQ_STOP_FOR_PRIOFC_MASK are to be considered.
 */
#define ALLPRIO                         -1

/* watchdog timer, in unit of ms */
#define TIMER_INTERVAL_WATCHDOG         1000
/* radio monitor timer, in unit of ms */
#define TIMER_INTERVAL_RADIOCHK         800

/* beacon interval, in unit of 1024TU */
#define BEACON_INTERVAL_DEFAULT         100

/* n-mode support capability */
/* 2x2 includes both 1x1 & 2x2 devices
 * reserved #define 2 for future when we want to separate 1x1 & 2x2 and
 * control it independently
 */
#define WL_11N_2x2                      1
#define WL_11N_3x3                      3
#define WL_11N_4x4                      4

#define EDCF_ACI_MASK                   0x60
#define EDCF_ACI_SHIFT                  5
#define EDCF_ECWMIN_MASK                0x0f
#define EDCF_ECWMAX_SHIFT               4
#define EDCF_AIFSN_MASK                 0x0f
#define EDCF_AIFSN_MAX                  15
#define EDCF_ECWMAX_MASK                0xf0

#define EDCF_AC_BE_TXOP_STA             0x0000
#define EDCF_AC_BK_TXOP_STA             0x0000
#define EDCF_AC_VO_ACI_STA              0x62
#define EDCF_AC_VO_ECW_STA              0x32
#define EDCF_AC_VI_ACI_STA              0x42
#define EDCF_AC_VI_ECW_STA              0x43
#define EDCF_AC_BK_ECW_STA              0xA4
#define EDCF_AC_VI_TXOP_STA             0x005e
#define EDCF_AC_VO_TXOP_STA             0x002f
#define EDCF_AC_BE_ACI_STA              0x03
#define EDCF_AC_BE_ECW_STA              0xA4
#define EDCF_AC_BK_ACI_STA              0x27
#define EDCF_AC_VO_TXOP_AP              0x002f

#define EDCF_TXOP2USEC(txop)            ((txop) << 5)
#define EDCF_ECW2CW(exp)                ((1 << (exp)) - 1)

#define APHY_SYMBOL_TIME                4
#define APHY_PREAMBLE_TIME              16
#define APHY_SIGNAL_TIME                4
#define APHY_SIFS_TIME                  16
#define APHY_SERVICE_NBITS              16
#define APHY_TAIL_NBITS                 6
#define BPHY_SIFS_TIME                  10
#define BPHY_PLCP_SHORT_TIME            96

#define PREN_PREAMBLE                   24
#define PREN_MM_EXT                     12
#define PREN_PREAMBLE_EXT               4

#define DOT11_MAC_HDR_LEN               24
#define DOT11_ACK_LEN                   10
#define DOT11_BA_LEN                    4
#define DOT11_OFDM_SIGNAL_EXTENSION     6
#define DOT11_MIN_FRAG_LEN              256
#define DOT11_RTS_LEN                   16
#define DOT11_CTS_LEN                   10
#define DOT11_BA_BITMAP_LEN             128
#define DOT11_MIN_BEACON_PERIOD         1
#define DOT11_MAX_BEACON_PERIOD         0xFFFF
#define DOT11_MAXNUMFRAGS               16
#define DOT11_MAX_FRAG_LEN              2346

#define BPHY_PLCP_TIME                  192
#define RIFS_11N_TIME                   2

/* length of the BCN template area */
#define BCN_TMPL_LEN                    512

/* brcms_bss_info flag bit values */
#define BRCMS_BSS_HT                    0x0020  /* BSS is HT (MIMO) capable */

/* chip rx buffer offset */
#define BRCMS_HWRXOFF                   38

/* rfdisable delay timer 500 ms, runs of ALP clock */
#define RFDISABLE_DEFAULT               10000000

#define BRCMS_TEMPSENSE_PERIOD          10      /* 10 second timeout */

/* precedences numbers for wlc queues. These are twice as may levels as
 * 802.1D priorities.
 * Odd numbers are used for HI priority traffic at same precedence levels
 * These constants are used ONLY by wlc_prio2prec_map.  Do not use them
 * elsewhere.
 */
#define _BRCMS_PREC_NONE                0       /* None = - */
#define _BRCMS_PREC_BK                  2       /* BK - Background */
#define _BRCMS_PREC_BE                  4       /* BE - Best-effort */
#define _BRCMS_PREC_EE                  6       /* EE - Excellent-effort */
#define _BRCMS_PREC_CL                  8       /* CL - Controlled Load */
#define _BRCMS_PREC_VI                  10      /* Vi - Video */
#define _BRCMS_PREC_VO                  12      /* Vo - Voice */
#define _BRCMS_PREC_NC                  14      /* NC - Network Control */

/* synthpu_dly times in us */
#define SYNTHPU_DLY_APHY_US             3700
#define SYNTHPU_DLY_BPHY_US             1050
#define SYNTHPU_DLY_NPHY_US             2048
#define SYNTHPU_DLY_LPPHY_US            300

#define ANTCNT                          10      /* vanilla M_MAX_ANTCNT val */

/* Per-AC retry limit register definitions; uses defs.h bitfield macros */
#define EDCF_SHORT_S                    0
#define EDCF_SFB_S                      4
#define EDCF_LONG_S                     8
#define EDCF_LFB_S                      12
#define EDCF_SHORT_M                    BITFIELD_MASK(4)
#define EDCF_SFB_M                      BITFIELD_MASK(4)
#define EDCF_LONG_M                     BITFIELD_MASK(4)
#define EDCF_LFB_M                      BITFIELD_MASK(4)

#define RETRY_SHORT_DEF                 7       /* Default Short retry Limit */
#define RETRY_SHORT_MAX                 255     /* Maximum Short retry Limit */
#define RETRY_LONG_DEF                  4       /* Default Long retry count */
#define RETRY_SHORT_FB                  3       /* Short count for fb rate */
#define RETRY_LONG_FB                   2       /* Long count for fb rate */

#define APHY_CWMIN                      15
#define PHY_CWMAX                       1023

#define EDCF_AIFSN_MIN                  1

#define FRAGNUM_MASK                    0xF

#define APHY_SLOT_TIME                  9
#define BPHY_SLOT_TIME                  20

#define WL_SPURAVOID_OFF                0
#define WL_SPURAVOID_ON1                1
#define WL_SPURAVOID_ON2                2

/* invalid core flags, use the saved coreflags */
#define BRCMS_USE_COREFLAGS             0xffffffff

/* values for PLCPHdr_override */
#define BRCMS_PLCP_AUTO                 -1
#define BRCMS_PLCP_SHORT                0
#define BRCMS_PLCP_LONG                 1

/* values for g_protection_override and n_protection_override */
#define BRCMS_PROTECTION_AUTO           -1
#define BRCMS_PROTECTION_OFF            0
#define BRCMS_PROTECTION_ON             1
#define BRCMS_PROTECTION_MMHDR_ONLY     2
#define BRCMS_PROTECTION_CTS_ONLY       3

/* values for g_protection_control and n_protection_control */
#define BRCMS_PROTECTION_CTL_OFF        0
#define BRCMS_PROTECTION_CTL_LOCAL      1
#define BRCMS_PROTECTION_CTL_OVERLAP    2

/* values for n_protection */
#define BRCMS_N_PROTECTION_OFF          0
#define BRCMS_N_PROTECTION_OPTIONAL     1
#define BRCMS_N_PROTECTION_20IN40       2
#define BRCMS_N_PROTECTION_MIXEDMODE    3

/* values for band specific 40MHz capabilities */
#define BRCMS_N_BW_20ALL                0
#define BRCMS_N_BW_40ALL                1
#define BRCMS_N_BW_20IN2G_40IN5G        2

/* bitflags for SGI support (sgi_rx iovar) */
#define BRCMS_N_SGI_20                  0x01
#define BRCMS_N_SGI_40                  0x02

/* defines used by the nrate iovar */
/* MSC in use,indicates b0-6 holds an mcs */
#define NRATE_MCS_INUSE                 0x00000080
/* rate/mcs value */
#define NRATE_RATE_MASK                 0x0000007f
/* stf mode mask: siso, cdd, stbc, sdm */
#define NRATE_STF_MASK                  0x0000ff00
/* stf mode shift */
#define NRATE_STF_SHIFT                 8
/* bit indicate to override mcs only */
#define NRATE_OVERRIDE_MCS_ONLY         0x40000000
#define NRATE_SGI_MASK                  0x00800000      /* sgi mode */
#define NRATE_SGI_SHIFT                 23              /* sgi mode */
#define NRATE_LDPC_CODING               0x00400000      /* adv coding in use */
#define NRATE_LDPC_SHIFT                22              /* ldpc shift */

#define NRATE_STF_SISO                  0               /* stf mode SISO */
#define NRATE_STF_CDD                   1               /* stf mode CDD */
#define NRATE_STF_STBC                  2               /* stf mode STBC */
#define NRATE_STF_SDM                   3               /* stf mode SDM */

#define MAX_DMA_SEGS                    4

/* Max # of entries in Tx FIFO based on 4kb page size */
#define NTXD                            256
/* Max # of entries in Rx FIFO based on 4kb page size */
#define NRXD                            256

/* try to keep this # rbufs posted to the chip */
#define NRXBUFPOST                      32

/* data msg txq hiwat mark */
#define BRCMS_DATAHIWAT                 50

/* max # frames to process in brcms_c_recv() */
#define RXBND                           8
/* max # tx status to process in wlc_txstatus() */
#define TXSBND                          8

/* brcmu_format_flags() bit description structure */
struct brcms_c_bit_desc {
        u32 bit;
        const char *name;
};

/*
 * The following table lists the buffer memory allocated to xmt fifos in HW.
 * the size is in units of 256bytes(one block), total size is HW dependent
 * ucode has default fifo partition, sw can overwrite if necessary
 *
 * This is documented in twiki under the topic UcodeTxFifo. Please ensure
 * the twiki is updated before making changes.
 */

/* Starting corerev for the fifo size table */
#define XMTFIFOTBL_STARTREV     17

struct d11init {
        __le16 addr;
        __le16 size;
        __le32 value;
};

struct edcf_acparam {
        u8 ACI;
        u8 ECW;
        u16 TXOP;
} __packed;

const u8 prio2fifo[NUMPRIO] = {
        TX_AC_BE_FIFO,          /* 0    BE      AC_BE   Best Effort */
        TX_AC_BK_FIFO,          /* 1    BK      AC_BK   Background */
        TX_AC_BK_FIFO,          /* 2    --      AC_BK   Background */
        TX_AC_BE_FIFO,          /* 3    EE      AC_BE   Best Effort */
        TX_AC_VI_FIFO,          /* 4    CL      AC_VI   Video */
        TX_AC_VI_FIFO,          /* 5    VI      AC_VI   Video */
        TX_AC_VO_FIFO,          /* 6    VO      AC_VO   Voice */
        TX_AC_VO_FIFO           /* 7    NC      AC_VO   Voice */
};

/* debug/trace */
uint brcm_msg_level =
#if defined(DEBUG)
        LOG_ERROR_VAL;
#else
        0;
#endif                          /* DEBUG */

/* TX FIFO number to WME/802.1E Access Category */
static const u8 wme_fifo2ac[] = {
        IEEE80211_AC_BK,
        IEEE80211_AC_BE,
        IEEE80211_AC_VI,
        IEEE80211_AC_VO,
        IEEE80211_AC_BE,
        IEEE80211_AC_BE
};

/* ieee80211 Access Category to TX FIFO number */
static const u8 wme_ac2fifo[] = {
        TX_AC_VO_FIFO,
        TX_AC_VI_FIFO,
        TX_AC_BE_FIFO,
        TX_AC_BK_FIFO
};

/* 802.1D Priority to precedence queue mapping */
const u8 wlc_prio2prec_map[] = {
        _BRCMS_PREC_BE,         /* 0 BE - Best-effort */
        _BRCMS_PREC_BK,         /* 1 BK - Background */
        _BRCMS_PREC_NONE,               /* 2 None = - */
        _BRCMS_PREC_EE,         /* 3 EE - Excellent-effort */
        _BRCMS_PREC_CL,         /* 4 CL - Controlled Load */
        _BRCMS_PREC_VI,         /* 5 Vi - Video */
        _BRCMS_PREC_VO,         /* 6 Vo - Voice */
        _BRCMS_PREC_NC,         /* 7 NC - Network Control */
};

static const u16 xmtfifo_sz[][NFIFO] = {
        /* corerev 17: 5120, 49152, 49152, 5376, 4352, 1280 */
        {20, 192, 192, 21, 17, 5},
        /* corerev 18: */
        {0, 0, 0, 0, 0, 0},
        /* corerev 19: */
        {0, 0, 0, 0, 0, 0},
        /* corerev 20: 5120, 49152, 49152, 5376, 4352, 1280 */
        {20, 192, 192, 21, 17, 5},
        /* corerev 21: 2304, 14848, 5632, 3584, 3584, 1280 */
        {9, 58, 22, 14, 14, 5},
        /* corerev 22: 5120, 49152, 49152, 5376, 4352, 1280 */
        {20, 192, 192, 21, 17, 5},
        /* corerev 23: 5120, 49152, 49152, 5376, 4352, 1280 */
        {20, 192, 192, 21, 17, 5},
        /* corerev 24: 2304, 14848, 5632, 3584, 3584, 1280 */
        {9, 58, 22, 14, 14, 5},
        /* corerev 25: */
        {0, 0, 0, 0, 0, 0},
        /* corerev 26: */
        {0, 0, 0, 0, 0, 0},
        /* corerev 27: */
        {0, 0, 0, 0, 0, 0},
        /* corerev 28: 2304, 14848, 5632, 3584, 3584, 1280 */
        {9, 58, 22, 14, 14, 5},
};

#ifdef DEBUG
static const char * const fifo_names[] = {
        "AC_BK", "AC_BE", "AC_VI", "AC_VO", "BCMC", "ATIM" };
#else
static const char fifo_names[6][0];
#endif

#ifdef DEBUG
/* pointer to most recently allocated wl/wlc */
static struct brcms_c_info *wlc_info_dbg = (struct brcms_c_info *) (NULL);
#endif

/* Find basic rate for a given rate */
static u8 brcms_basic_rate(struct brcms_c_info *wlc, u32 rspec)
{
        if (is_mcs_rate(rspec))
                return wlc->band->basic_rate[mcs_table[rspec & RSPEC_RATE_MASK]
                       .leg_ofdm];
        return wlc->band->basic_rate[rspec & RSPEC_RATE_MASK];
}

static u16 frametype(u32 rspec, u8 mimoframe)
{
        if (is_mcs_rate(rspec))
                return mimoframe;
        return is_cck_rate(rspec) ? FT_CCK : FT_OFDM;
}

/* currently the best mechanism for determining SIFS is the band in use */
static u16 get_sifs(struct brcms_band *band)
{
        return band->bandtype == BRCM_BAND_5G ? APHY_SIFS_TIME :
                                 BPHY_SIFS_TIME;
}

/*
 * Detect Card removed.
 * Even checking an sbconfig register read will not false trigger when the core
 * is in reset it breaks CF address mechanism. Accessing gphy phyversion will
 * cause SB error if aphy is in reset on 4306B0-DB. Need a simple accessible
 * reg with fixed 0/1 pattern (some platforms return all 0).
 * If clocks are present, call the sb routine which will figure out if the
 * device is removed.
 */
static bool brcms_deviceremoved(struct brcms_c_info *wlc)
{
        u32 macctrl;

        if (!wlc->hw->clk)
                return ai_deviceremoved(wlc->hw->sih);
        macctrl = bcma_read32(wlc->hw->d11core,
                              D11REGOFFS(maccontrol));
        return (macctrl & (MCTL_PSM_JMP_0 | MCTL_IHR_EN)) != MCTL_IHR_EN;
}

/* sum the individual fifo tx pending packet counts */
static s16 brcms_txpktpendtot(struct brcms_c_info *wlc)
{
        return wlc->core->txpktpend[0] + wlc->core->txpktpend[1] +
               wlc->core->txpktpend[2] + wlc->core->txpktpend[3];
}

static bool brcms_is_mband_unlocked(struct brcms_c_info *wlc)
{
        return wlc->pub->_nbands > 1 && !wlc->bandlocked;
}

static int brcms_chspec_bw(u16 chanspec)
{
        if (CHSPEC_IS40(chanspec))
                return BRCMS_40_MHZ;
        if (CHSPEC_IS20(chanspec))
                return BRCMS_20_MHZ;

        return BRCMS_10_MHZ;
}

static void brcms_c_bsscfg_mfree(struct brcms_bss_cfg *cfg)
{
        if (cfg == NULL)
                return;

        kfree(cfg->current_bss);
        kfree(cfg);
}

static void brcms_c_detach_mfree(struct brcms_c_info *wlc)
{
        if (wlc == NULL)
                return;

        brcms_c_bsscfg_mfree(wlc->bsscfg);
        kfree(wlc->pub);
        kfree(wlc->modulecb);
        kfree(wlc->default_bss);
        kfree(wlc->protection);
        kfree(wlc->stf);
        kfree(wlc->bandstate[0]);
        kfree(wlc->corestate->macstat_snapshot);
        kfree(wlc->corestate);
        kfree(wlc->hw->bandstate[0]);
        kfree(wlc->hw);

        /* free the wlc */
        kfree(wlc);
        wlc = NULL;
}

static struct brcms_bss_cfg *brcms_c_bsscfg_malloc(uint unit)
{
        struct brcms_bss_cfg *cfg;

        cfg = kzalloc(sizeof(struct brcms_bss_cfg), GFP_ATOMIC);
        if (cfg == NULL)
                goto fail;

        cfg->current_bss = kzalloc(sizeof(struct brcms_bss_info), GFP_ATOMIC);
        if (cfg->current_bss == NULL)
                goto fail;

        return cfg;

 fail:
        brcms_c_bsscfg_mfree(cfg);
        return NULL;
}

static struct brcms_c_info *
brcms_c_attach_malloc(uint unit, uint *err, uint devid)
{
        struct brcms_c_info *wlc;

        wlc = kzalloc(sizeof(struct brcms_c_info), GFP_ATOMIC);
        if (wlc == NULL) {
                *err = 1002;
                goto fail;
        }

        /* allocate struct brcms_c_pub state structure */
        wlc->pub = kzalloc(sizeof(struct brcms_pub), GFP_ATOMIC);
        if (wlc->pub == NULL) {
                *err = 1003;
                goto fail;
        }
        wlc->pub->wlc = wlc;

        /* allocate struct brcms_hardware state structure */

        wlc->hw = kzalloc(sizeof(struct brcms_hardware), GFP_ATOMIC);
        if (wlc->hw == NULL) {
                *err = 1005;
                goto fail;
        }
        wlc->hw->wlc = wlc;

        wlc->hw->bandstate[0] =
                kzalloc(sizeof(struct brcms_hw_band) * MAXBANDS, GFP_ATOMIC);
        if (wlc->hw->bandstate[0] == NULL) {
                *err = 1006;
                goto fail;
        } else {
                int i;

                for (i = 1; i < MAXBANDS; i++)
                        wlc->hw->bandstate[i] = (struct brcms_hw_band *)
                            ((unsigned long)wlc->hw->bandstate[0] +
                             (sizeof(struct brcms_hw_band) * i));
        }

        wlc->modulecb =
                kzalloc(sizeof(struct modulecb) * BRCMS_MAXMODULES, GFP_ATOMIC);
        if (wlc->modulecb == NULL) {
                *err = 1009;
                goto fail;
        }

        wlc->default_bss = kzalloc(sizeof(struct brcms_bss_info), GFP_ATOMIC);
        if (wlc->default_bss == NULL) {
                *err = 1010;
                goto fail;
        }

        wlc->bsscfg = brcms_c_bsscfg_malloc(unit);
        if (wlc->bsscfg == NULL) {
                *err = 1011;
                goto fail;
        }

        wlc->protection = kzalloc(sizeof(struct brcms_protection),
                                  GFP_ATOMIC);
        if (wlc->protection == NULL) {
                *err = 1016;
                goto fail;
        }

        wlc->stf = kzalloc(sizeof(struct brcms_stf), GFP_ATOMIC);
        if (wlc->stf == NULL) {
                *err = 1017;
                goto fail;
        }

        wlc->bandstate[0] =
                kzalloc(sizeof(struct brcms_band)*MAXBANDS, GFP_ATOMIC);
        if (wlc->bandstate[0] == NULL) {
                *err = 1025;
                goto fail;
        } else {
                int i;

                for (i = 1; i < MAXBANDS; i++)
                        wlc->bandstate[i] = (struct brcms_band *)
                                ((unsigned long)wlc->bandstate[0]
                                + (sizeof(struct brcms_band)*i));
        }

        wlc->corestate = kzalloc(sizeof(struct brcms_core), GFP_ATOMIC);
        if (wlc->corestate == NULL) {
                *err = 1026;
                goto fail;
        }

        wlc->corestate->macstat_snapshot =
                kzalloc(sizeof(struct macstat), GFP_ATOMIC);
        if (wlc->corestate->macstat_snapshot == NULL) {
                *err = 1027;
                goto fail;
        }

        return wlc;

 fail:
        brcms_c_detach_mfree(wlc);
        return NULL;
}

/*
 * Update the slot timing for standard 11b/g (20us slots)
 * or shortslot 11g (9us slots)
 * The PSM needs to be suspended for this call.
 */
static void brcms_b_update_slot_timing(struct brcms_hardware *wlc_hw,
                                        bool shortslot)
{
        struct bcma_device *core = wlc_hw->d11core;

        if (shortslot) {
                /* 11g short slot: 11a timing */
                bcma_write16(core, D11REGOFFS(ifs_slot), 0x0207);
                brcms_b_write_shm(wlc_hw, M_DOT11_SLOT, APHY_SLOT_TIME);
        } else {
                /* 11g long slot: 11b timing */
                bcma_write16(core, D11REGOFFS(ifs_slot), 0x0212);
                brcms_b_write_shm(wlc_hw, M_DOT11_SLOT, BPHY_SLOT_TIME);
        }
}

/*
 * calculate frame duration of a given rate and length, return
 * time in usec unit
 */
static uint brcms_c_calc_frame_time(struct brcms_c_info *wlc, u32 ratespec,
                                    u8 preamble_type, uint mac_len)
{
        uint nsyms, dur = 0, Ndps, kNdps;
        uint rate = rspec2rate(ratespec);

        if (rate == 0) {
                wiphy_err(wlc->wiphy, "wl%d: WAR: using rate of 1 mbps\n",
                          wlc->pub->unit);
                rate = BRCM_RATE_1M;
        }

        BCMMSG(wlc->wiphy, "wl%d: rspec 0x%x, preamble_type %d, len%d\n",
                 wlc->pub->unit, ratespec, preamble_type, mac_len);

        if (is_mcs_rate(ratespec)) {
                uint mcs = ratespec & RSPEC_RATE_MASK;
                int tot_streams = mcs_2_txstreams(mcs) + rspec_stc(ratespec);

                dur = PREN_PREAMBLE + (tot_streams * PREN_PREAMBLE_EXT);
                if (preamble_type == BRCMS_MM_PREAMBLE)
                        dur += PREN_MM_EXT;
                /* 1000Ndbps = kbps * 4 */
                kNdps = mcs_2_rate(mcs, rspec_is40mhz(ratespec),
                                   rspec_issgi(ratespec)) * 4;

                if (rspec_stc(ratespec) == 0)
                        nsyms =
                            CEIL((APHY_SERVICE_NBITS + 8 * mac_len +
                                  APHY_TAIL_NBITS) * 1000, kNdps);
                else
                        /* STBC needs to have even number of symbols */
                        nsyms =
                            2 *
                            CEIL((APHY_SERVICE_NBITS + 8 * mac_len +
                                  APHY_TAIL_NBITS) * 1000, 2 * kNdps);

                dur += APHY_SYMBOL_TIME * nsyms;
                if (wlc->band->bandtype == BRCM_BAND_2G)
                        dur += DOT11_OFDM_SIGNAL_EXTENSION;
        } else if (is_ofdm_rate(rate)) {
                dur = APHY_PREAMBLE_TIME;
                dur += APHY_SIGNAL_TIME;
                /* Ndbps = Mbps * 4 = rate(500Kbps) * 2 */
                Ndps = rate * 2;
                /* NSyms = CEILING((SERVICE + 8*NBytes + TAIL) / Ndbps) */
                nsyms =
                    CEIL((APHY_SERVICE_NBITS + 8 * mac_len + APHY_TAIL_NBITS),
                         Ndps);
                dur += APHY_SYMBOL_TIME * nsyms;
                if (wlc->band->bandtype == BRCM_BAND_2G)
                        dur += DOT11_OFDM_SIGNAL_EXTENSION;
        } else {
                /*
                 * calc # bits * 2 so factor of 2 in rate (1/2 mbps)
                 * will divide out
                 */
                mac_len = mac_len * 8 * 2;
                /* calc ceiling of bits/rate = microseconds of air time */
                dur = (mac_len + rate - 1) / rate;
                if (preamble_type & BRCMS_SHORT_PREAMBLE)
                        dur += BPHY_PLCP_SHORT_TIME;
                else
                        dur += BPHY_PLCP_TIME;
        }
        return dur;
}

static void brcms_c_write_inits(struct brcms_hardware *wlc_hw,
                                const struct d11init *inits)
{
        struct bcma_device *core = wlc_hw->d11core;
        int i;
        uint offset;
        u16 size;
        u32 value;

        BCMMSG(wlc_hw->wlc->wiphy, "wl%d\n", wlc_hw->unit);

        for (i = 0; inits[i].addr != cpu_to_le16(0xffff); i++) {
                size = le16_to_cpu(inits[i].size);
                offset = le16_to_cpu(inits[i].addr);
                value = le32_to_cpu(inits[i].value);
                if (size == 2)
                        bcma_write16(core, offset, value);
                else if (size == 4)
                        bcma_write32(core, offset, value);
                else
                        break;
        }
}

static void brcms_c_write_mhf(struct brcms_hardware *wlc_hw, u16 *mhfs)
{
        u8 idx;
        u16 addr[] = {
                M_HOST_FLAGS1, M_HOST_FLAGS2, M_HOST_FLAGS3, M_HOST_FLAGS4,
                M_HOST_FLAGS5
        };

        for (idx = 0; idx < MHFMAX; idx++)
                brcms_b_write_shm(wlc_hw, addr[idx], mhfs[idx]);
}

static void brcms_c_ucode_bsinit(struct brcms_hardware *wlc_hw)
{
        struct wiphy *wiphy = wlc_hw->wlc->wiphy;
        struct brcms_ucode *ucode = &wlc_hw->wlc->wl->ucode;

        /* init microcode host flags */
        brcms_c_write_mhf(wlc_hw, wlc_hw->band->mhfs);

        /* do band-specific ucode IHR, SHM, and SCR inits */
        if (D11REV_IS(wlc_hw->corerev, 23)) {
                if (BRCMS_ISNPHY(wlc_hw->band))
                        brcms_c_write_inits(wlc_hw, ucode->d11n0bsinitvals16);
                else
                        wiphy_err(wiphy, "%s: wl%d: unsupported phy in corerev"
                                  " %d\n", __func__, wlc_hw->unit,
                                  wlc_hw->corerev);
        } else {
                if (D11REV_IS(wlc_hw->corerev, 24)) {
                        if (BRCMS_ISLCNPHY(wlc_hw->band))
                                brcms_c_write_inits(wlc_hw,
                                                    ucode->d11lcn0bsinitvals24);
                        else
                                wiphy_err(wiphy, "%s: wl%d: unsupported phy in"
                                          " core rev %d\n", __func__,
                                          wlc_hw->unit, wlc_hw->corerev);
                } else {
                        wiphy_err(wiphy, "%s: wl%d: unsupported corerev %d\n",
                                __func__, wlc_hw->unit, wlc_hw->corerev);
                }
        }
}

static void brcms_b_core_ioctl(struct brcms_hardware *wlc_hw, u32 m, u32 v)
{
        struct bcma_device *core = wlc_hw->d11core;
        u32 ioctl = bcma_aread32(core, BCMA_IOCTL) & ~m;

        bcma_awrite32(core, BCMA_IOCTL, ioctl | v);
}

static void brcms_b_core_phy_clk(struct brcms_hardware *wlc_hw, bool clk)
{
        BCMMSG(wlc_hw->wlc->wiphy, "wl%d: clk %d\n", wlc_hw->unit, clk);

        wlc_hw->phyclk = clk;

        if (OFF == clk) {       /* clear gmode bit, put phy into reset */

                brcms_b_core_ioctl(wlc_hw, (SICF_PRST | SICF_FGC | SICF_GMODE),
                                   (SICF_PRST | SICF_FGC));
                udelay(1);
                brcms_b_core_ioctl(wlc_hw, (SICF_PRST | SICF_FGC), SICF_PRST);
                udelay(1);

        } else {                /* take phy out of reset */

                brcms_b_core_ioctl(wlc_hw, (SICF_PRST | SICF_FGC), SICF_FGC);
                udelay(1);
                brcms_b_core_ioctl(wlc_hw, SICF_FGC, 0);
                udelay(1);

        }
}

/* low-level band switch utility routine */
static void brcms_c_setxband(struct brcms_hardware *wlc_hw, uint bandunit)
{
        BCMMSG(wlc_hw->wlc->wiphy, "wl%d: bandunit %d\n", wlc_hw->unit,
                bandunit);

        wlc_hw->band = wlc_hw->bandstate[bandunit];

        /*
         * BMAC_NOTE:
         *   until we eliminate need for wlc->band refs in low level code
         */
        wlc_hw->wlc->band = wlc_hw->wlc->bandstate[bandunit];

        /* set gmode core flag */
        if (wlc_hw->sbclk && !wlc_hw->noreset) {
                u32 gmode = 0;

                if (bandunit == 0)
                        gmode = SICF_GMODE;

                brcms_b_core_ioctl(wlc_hw, SICF_GMODE, gmode);
        }
}

/* switch to new band but leave it inactive */
static u32 brcms_c_setband_inact(struct brcms_c_info *wlc, uint bandunit)
{
        struct brcms_hardware *wlc_hw = wlc->hw;
        u32 macintmask;
        u32 macctrl;

        BCMMSG(wlc->wiphy, "wl%d\n", wlc_hw->unit);
        macctrl = bcma_read32(wlc_hw->d11core,
                              D11REGOFFS(maccontrol));
        WARN_ON((macctrl & MCTL_EN_MAC) != 0);

        /* disable interrupts */
        macintmask = brcms_intrsoff(wlc->wl);

        /* radio off */
        wlc_phy_switch_radio(wlc_hw->band->pi, OFF);

        brcms_b_core_phy_clk(wlc_hw, OFF);

        brcms_c_setxband(wlc_hw, bandunit);

        return macintmask;
}

/* process an individual struct tx_status */
static bool
brcms_c_dotxstatus(struct brcms_c_info *wlc, struct tx_status *txs)
{
        struct sk_buff *p;
        uint queue;
        struct d11txh *txh;
        struct scb *scb = NULL;
        bool free_pdu;
        int tx_rts, tx_frame_count, tx_rts_count;
        uint totlen, supr_status;
        bool lastframe;
        struct ieee80211_hdr *h;
        u16 mcl;
        struct ieee80211_tx_info *tx_info;
        struct ieee80211_tx_rate *txrate;
        int i;

        /* discard intermediate indications for ucode with one legitimate case:
         *   e.g. if "useRTS" is set. ucode did a successful rts/cts exchange,
         *   but the subsequent tx of DATA failed. so it will start rts/cts
         *   from the beginning (resetting the rts transmission count)
         */
        if (!(txs->status & TX_STATUS_AMPDU)
            && (txs->status & TX_STATUS_INTERMEDIATE)) {
                BCMMSG(wlc->wiphy, "INTERMEDIATE but not AMPDU\n");
                return false;
        }

        queue = txs->frameid & TXFID_QUEUE_MASK;
        if (queue >= NFIFO) {
                p = NULL;
                goto fatal;
        }

        p = dma_getnexttxp(wlc->hw->di[queue], DMA_RANGE_TRANSMITTED);
        if (p == NULL)
                goto fatal;

        txh = (struct d11txh *) (p->data);
        mcl = le16_to_cpu(txh->MacTxControlLow);

        if (txs->phyerr) {
                if (brcm_msg_level & LOG_ERROR_VAL) {
                        wiphy_err(wlc->wiphy, "phyerr 0x%x, rate 0x%x\n",
                                  txs->phyerr, txh->MainRates);
                        brcms_c_print_txdesc(txh);
                }
                brcms_c_print_txstatus(txs);
        }

        if (txs->frameid != le16_to_cpu(txh->TxFrameID))
                goto fatal;
        tx_info = IEEE80211_SKB_CB(p);
        h = (struct ieee80211_hdr *)((u8 *) (txh + 1) + D11_PHY_HDR_LEN);

        if (tx_info->rate_driver_data[0])
                scb = &wlc->pri_scb;

        if (tx_info->flags & IEEE80211_TX_CTL_AMPDU) {
                brcms_c_ampdu_dotxstatus(wlc->ampdu, scb, p, txs);
                return false;
        }

        supr_status = txs->status & TX_STATUS_SUPR_MASK;
        if (supr_status == TX_STATUS_SUPR_BADCH)
                BCMMSG(wlc->wiphy,
                       "%s: Pkt tx suppressed, possibly channel %d\n",
                       __func__, CHSPEC_CHANNEL(wlc->default_bss->chanspec));

        tx_rts = le16_to_cpu(txh->MacTxControlLow) & TXC_SENDRTS;
        tx_frame_count =
            (txs->status & TX_STATUS_FRM_RTX_MASK) >> TX_STATUS_FRM_RTX_SHIFT;
        tx_rts_count =
            (txs->status & TX_STATUS_RTS_RTX_MASK) >> TX_STATUS_RTS_RTX_SHIFT;

        lastframe = !ieee80211_has_morefrags(h->frame_control);

        if (!lastframe) {
                wiphy_err(wlc->wiphy, "Not last frame!\n");
        } else {
                /*
                 * Set information to be consumed by Minstrel ht.
                 *
                 * The "fallback limit" is the number of tx attempts a given
                 * MPDU is sent at the "primary" rate. Tx attempts beyond that
                 * limit are sent at the "secondary" rate.
                 * A 'short frame' does not exceed RTS treshold.
                 */
                u16 sfbl,       /* Short Frame Rate Fallback Limit */
                    lfbl,       /* Long Frame Rate Fallback Limit */
                    fbl;

                if (queue < IEEE80211_NUM_ACS) {
                        sfbl = GFIELD(wlc->wme_retries[wme_fifo2ac[queue]],
                                      EDCF_SFB);
                        lfbl = GFIELD(wlc->wme_retries[wme_fifo2ac[queue]],
                                      EDCF_LFB);
                } else {
                        sfbl = wlc->SFBL;
                        lfbl = wlc->LFBL;
                }

                txrate = tx_info->status.rates;
                if (txrate[0].flags & IEEE80211_TX_RC_USE_RTS_CTS)
                        fbl = lfbl;
                else
                        fbl = sfbl;

                ieee80211_tx_info_clear_status(tx_info);

                if ((tx_frame_count > fbl) && (txrate[1].idx >= 0)) {
                        /*
                         * rate selection requested a fallback rate
                         * and we used it
                         */
                        txrate[0].count = fbl;
                        txrate[1].count = tx_frame_count - fbl;
                } else {
                        /*
                         * rate selection did not request fallback rate, or
                         * we didn't need it
                         */
                        txrate[0].count = tx_frame_count;
                        /*
                         * rc80211_minstrel.c:minstrel_tx_status() expects
                         * unused rates to be marked with idx = -1
                         */
                        txrate[1].idx = -1;
                        txrate[1].count = 0;
                }

                /* clear the rest of the rates */
                for (i = 2; i < IEEE80211_TX_MAX_RATES; i++) {
                        txrate[i].idx = -1;
                        txrate[i].count = 0;
                }

                if (txs->status & TX_STATUS_ACK_RCV)
                        tx_info->flags |= IEEE80211_TX_STAT_ACK;
        }

        totlen = p->len;
        free_pdu = true;

        brcms_c_txfifo_complete(wlc, queue, 1);

        if (lastframe) {
                /* remove PLCP & Broadcom tx descriptor header */
                skb_pull(p, D11_PHY_HDR_LEN);
                skb_pull(p, D11_TXH_LEN);
                ieee80211_tx_status_irqsafe(wlc->pub->ieee_hw, p);
        } else {
                wiphy_err(wlc->wiphy, "%s: Not last frame => not calling "
                          "tx_status\n", __func__);
        }

        return false;

 fatal:
        if (p)

                brcmu_pkt_buf_free_skb(p);

        return true;

}

/* process tx completion events in BMAC
 * Return true if more tx status need to be processed. false otherwise.
 */
static bool
brcms_b_txstatus(struct brcms_hardware *wlc_hw, bool bound, bool *fatal)
{
        bool morepending = false;
        struct brcms_c_info *wlc = wlc_hw->wlc;
        struct bcma_device *core;
        struct tx_status txstatus, *txs;
        u32 s1, s2;
        uint n = 0;
        /*
         * Param 'max_tx_num' indicates max. # tx status to process before
         * break out.
         */
        uint max_tx_num = bound ? TXSBND : -1;

        BCMMSG(wlc->wiphy, "wl%d\n", wlc_hw->unit);

        txs = &txstatus;
        core = wlc_hw->d11core;
        *fatal = false;
        s1 = bcma_read32(core, D11REGOFFS(frmtxstatus));
        while (!(*fatal)
               && (s1 & TXS_V)) {

                if (s1 == 0xffffffff) {
                        wiphy_err(wlc->wiphy, "wl%d: %s: dead chip\n",
                                wlc_hw->unit, __func__);
                        return morepending;
                }
                s2 = bcma_read32(core, D11REGOFFS(frmtxstatus2));

                txs->status = s1 & TXS_STATUS_MASK;
                txs->frameid = (s1 & TXS_FID_MASK) >> TXS_FID_SHIFT;
                txs->sequence = s2 & TXS_SEQ_MASK;
                txs->phyerr = (s2 & TXS_PTX_MASK) >> TXS_PTX_SHIFT;
                txs->lasttxtime = 0;

                *fatal = brcms_c_dotxstatus(wlc_hw->wlc, txs);

                /* !give others some time to run! */
                if (++n >= max_tx_num)
                        break;
                s1 = bcma_read32(core, D11REGOFFS(frmtxstatus));
        }

        if (*fatal)
                return 0;

        if (n >= max_tx_num)
                morepending = true;

        if (!pktq_empty(&wlc->pkt_queue->q))
                brcms_c_send_q(wlc);

        return morepending;
}

static void brcms_c_tbtt(struct brcms_c_info *wlc)
{
        if (!wlc->bsscfg->BSS)
                /*
                 * DirFrmQ is now valid...defer setting until end
                 * of ATIM window
                 */
                wlc->qvalid |= MCMD_DIRFRMQVAL;
}

/* set initial host flags value */
static void
brcms_c_mhfdef(struct brcms_c_info *wlc, u16 *mhfs, u16 mhf2_init)
{
        struct brcms_hardware *wlc_hw = wlc->hw;

        memset(mhfs, 0, MHFMAX * sizeof(u16));

        mhfs[MHF2] |= mhf2_init;

        /* prohibit use of slowclock on multifunction boards */
        if (wlc_hw->boardflags & BFL_NOPLLDOWN)
                mhfs[MHF1] |= MHF1_FORCEFASTCLK;

        if (BRCMS_ISNPHY(wlc_hw->band) && NREV_LT(wlc_hw->band->phyrev, 2)) {
                mhfs[MHF2] |= MHF2_NPHY40MHZ_WAR;
                mhfs[MHF1] |= MHF1_IQSWAP_WAR;
        }
}

static uint
dmareg(uint direction, uint fifonum)
{
        if (direction == DMA_TX)
                return offsetof(struct d11regs, fifo64regs[fifonum].dmaxmt);
        return offsetof(struct d11regs, fifo64regs[fifonum].dmarcv);
}

static bool brcms_b_attach_dmapio(struct brcms_c_info *wlc, uint j, bool wme)
{
        uint i;
        char name[8];
        /*
         * ucode host flag 2 needed for pio mode, independent of band and fifo
         */
        u16 pio_mhf2 = 0;
        struct brcms_hardware *wlc_hw = wlc->hw;
        uint unit = wlc_hw->unit;
        struct wiphy *wiphy = wlc->wiphy;

        /* name and offsets for dma_attach */
        snprintf(name, sizeof(name), "wl%d", unit);

        if (wlc_hw->di[0] == NULL) {    /* Init FIFOs */
                int dma_attach_err = 0;

                /*
                 * FIFO 0
                 * TX: TX_AC_BK_FIFO (TX AC Background data packets)
                 * RX: RX_FIFO (RX data packets)
                 */
                wlc_hw->di[0] = dma_attach(name, wlc_hw->sih, wlc_hw->d11core,
                                           (wme ? dmareg(DMA_TX, 0) : 0),
                                           dmareg(DMA_RX, 0),
                                           (wme ? NTXD : 0), NRXD,
                                           RXBUFSZ, -1, NRXBUFPOST,
                                           BRCMS_HWRXOFF, &brcm_msg_level);
                dma_attach_err |= (NULL == wlc_hw->di[0]);

                /*
                 * FIFO 1
                 * TX: TX_AC_BE_FIFO (TX AC Best-Effort data packets)
                 *   (legacy) TX_DATA_FIFO (TX data packets)
                 * RX: UNUSED
                 */
                wlc_hw->di[1] = dma_attach(name, wlc_hw->sih, wlc_hw->d11core,
                                           dmareg(DMA_TX, 1), 0,
                                           NTXD, 0, 0, -1, 0, 0,
                                           &brcm_msg_level);
                dma_attach_err |= (NULL == wlc_hw->di[1]);

                /*
                 * FIFO 2
                 * TX: TX_AC_VI_FIFO (TX AC Video data packets)
                 * RX: UNUSED
                 */
                wlc_hw->di[2] = dma_attach(name, wlc_hw->sih, wlc_hw->d11core,
                                           dmareg(DMA_TX, 2), 0,
                                           NTXD, 0, 0, -1, 0, 0,
                                           &brcm_msg_level);
                dma_attach_err |= (NULL == wlc_hw->di[2]);
                /*
                 * FIFO 3
                 * TX: TX_AC_VO_FIFO (TX AC Voice data packets)
                 *   (legacy) TX_CTL_FIFO (TX control & mgmt packets)
                 */
                wlc_hw->di[3] = dma_attach(name, wlc_hw->sih, wlc_hw->d11core,
                                           dmareg(DMA_TX, 3),
                                           0, NTXD, 0, 0, -1,
                                           0, 0, &brcm_msg_level);
                dma_attach_err |= (NULL == wlc_hw->di[3]);
/* Cleaner to leave this as if with AP defined */

                if (dma_attach_err) {
                        wiphy_err(wiphy, "wl%d: wlc_attach: dma_attach failed"
                                  "\n", unit);
                        return false;
                }

                /* get pointer to dma engine tx flow control variable */
                for (i = 0; i < NFIFO; i++)
                        if (wlc_hw->di[i])
                                wlc_hw->txavail[i] =
                                    (uint *) dma_getvar(wlc_hw->di[i],
                                                        "&txavail");
        }

        /* initial ucode host flags */
        brcms_c_mhfdef(wlc, wlc_hw->band->mhfs, pio_mhf2);

        return true;
}

static void brcms_b_detach_dmapio(struct brcms_hardware *wlc_hw)
{
        uint j;

        for (j = 0; j < NFIFO; j++) {
                if (wlc_hw->di[j]) {
                        dma_detach(wlc_hw->di[j]);
                        wlc_hw->di[j] = NULL;
                }
        }
}

/*
 * Initialize brcms_c_info default values ...
 * may get overrides later in this function
 *  BMAC_NOTES, move low out and resolve the dangling ones
 */
static void brcms_b_info_init(struct brcms_hardware *wlc_hw)
{
        struct brcms_c_info *wlc = wlc_hw->wlc;

        /* set default sw macintmask value */
        wlc->defmacintmask = DEF_MACINTMASK;

        /* various 802.11g modes */
        wlc_hw->shortslot = false;

        wlc_hw->SFBL = RETRY_SHORT_FB;
        wlc_hw->LFBL = RETRY_LONG_FB;

        /* default mac retry limits */
        wlc_hw->SRL = RETRY_SHORT_DEF;
        wlc_hw->LRL = RETRY_LONG_DEF;
        wlc_hw->chanspec = ch20mhz_chspec(1);
}

static void brcms_b_wait_for_wake(struct brcms_hardware *wlc_hw)
{
        /* delay before first read of ucode state */
        udelay(40);

        /* wait until ucode is no longer asleep */
        SPINWAIT((brcms_b_read_shm(wlc_hw, M_UCODE_DBGST) ==
                  DBGST_ASLEEP), wlc_hw->wlc->fastpwrup_dly);
}

/* control chip clock to save power, enable dynamic clock or force fast clock */
static void brcms_b_clkctl_clk(struct brcms_hardware *wlc_hw, enum bcma_clkmode mode)
{
        if (ai_get_cccaps(wlc_hw->sih) & CC_CAP_PMU) {
                /* new chips with PMU, CCS_FORCEHT will distribute the HT clock
                 * on backplane, but mac core will still run on ALP(not HT) when
                 * it enters powersave mode, which means the FCA bit may not be
                 * set. Should wakeup mac if driver wants it to run on HT.
                 */

                if (wlc_hw->clk) {
                        if (mode == BCMA_CLKMODE_FAST) {
                                bcma_set32(wlc_hw->d11core,
                                           D11REGOFFS(clk_ctl_st),
                                           CCS_FORCEHT);

                                udelay(64);

                                SPINWAIT(
                                    ((bcma_read32(wlc_hw->d11core,
                                      D11REGOFFS(clk_ctl_st)) &
                                      CCS_HTAVAIL) == 0),
                                      PMU_MAX_TRANSITION_DLY);
                                WARN_ON(!(bcma_read32(wlc_hw->d11core,
                                        D11REGOFFS(clk_ctl_st)) &
                                        CCS_HTAVAIL));
                        } else {
                                if ((ai_get_pmurev(wlc_hw->sih) == 0) &&
                                    (bcma_read32(wlc_hw->d11core,
                                        D11REGOFFS(clk_ctl_st)) &
                                        (CCS_FORCEHT | CCS_HTAREQ)))
                                        SPINWAIT(
                                            ((bcma_read32(wlc_hw->d11core,
                                              offsetof(struct d11regs,
                                                       clk_ctl_st)) &
                                              CCS_HTAVAIL) == 0),
                                              PMU_MAX_TRANSITION_DLY);
                                bcma_mask32(wlc_hw->d11core,
                                        D11REGOFFS(clk_ctl_st),
                                        ~CCS_FORCEHT);
                        }
                }
                wlc_hw->forcefastclk = (mode == BCMA_CLKMODE_FAST);
        } else {

                /* old chips w/o PMU, force HT through cc,
                 * then use FCA to verify mac is running fast clock
                 */

                wlc_hw->forcefastclk = ai_clkctl_cc(wlc_hw->sih, mode);

                /* check fast clock is available (if core is not in reset) */
                if (wlc_hw->forcefastclk && wlc_hw->clk)
                        WARN_ON(!(bcma_aread32(wlc_hw->d11core, BCMA_IOST) &
                                  SISF_FCLKA));

                /*
                 * keep the ucode wake bit on if forcefastclk is on since we
                 * do not want ucode to put us back to slow clock when it dozes
                 * for PM mode. Code below matches the wake override bit with
                 * current forcefastclk state. Only setting bit in wake_override
                 * instead of waking ucode immediately since old code had this
                 * behavior. Older code set wlc->forcefastclk but only had the
                 * wake happen if the wakup_ucode work (protected by an up
                 * check) was executed just below.
                 */
                if (wlc_hw->forcefastclk)
                        mboolset(wlc_hw->wake_override,
                                 BRCMS_WAKE_OVERRIDE_FORCEFAST);
                else
                        mboolclr(wlc_hw->wake_override,
                                 BRCMS_WAKE_OVERRIDE_FORCEFAST);
        }
}

/* set or clear ucode host flag bits
 * it has an optimization for no-change write
 * it only writes through shared memory when the core has clock;
 * pre-CLK changes should use wlc_write_mhf to get around the optimization
 *
 *
 * bands values are: BRCM_BAND_AUTO <--- Current band only
 *                   BRCM_BAND_5G   <--- 5G band only
 *                   BRCM_BAND_2G   <--- 2G band only
 *                   BRCM_BAND_ALL  <--- All bands
 */
void
brcms_b_mhf(struct brcms_hardware *wlc_hw, u8 idx, u16 mask, u16 val,
             int bands)
{
        u16 save;
        u16 addr[MHFMAX] = {
                M_HOST_FLAGS1, M_HOST_FLAGS2, M_HOST_FLAGS3, M_HOST_FLAGS4,
                M_HOST_FLAGS5
        };
        struct brcms_hw_band *band;

        if ((val & ~mask) || idx >= MHFMAX)
                return; /* error condition */

        switch (bands) {
                /* Current band only or all bands,
                 * then set the band to current band
                 */
        case BRCM_BAND_AUTO:
        case BRCM_BAND_ALL:
                band = wlc_hw->band;
                break;
        case BRCM_BAND_5G:
                band = wlc_hw->bandstate[BAND_5G_INDEX];
                break;
        case BRCM_BAND_2G:
                band = wlc_hw->bandstate[BAND_2G_INDEX];
                break;
        default:
                band = NULL;    /* error condition */
        }

        if (band) {
                save = band->mhfs[idx];
                band->mhfs[idx] = (band->mhfs[idx] & ~mask) | val;

                /* optimization: only write through if changed, and
                 * changed band is the current band
                 */
                if (wlc_hw->clk && (band->mhfs[idx] != save)
                    && (band == wlc_hw->band))
                        brcms_b_write_shm(wlc_hw, addr[idx],
                                           (u16) band->mhfs[idx]);
        }

        if (bands == BRCM_BAND_ALL) {
                wlc_hw->bandstate[0]->mhfs[idx] =
                    (wlc_hw->bandstate[0]->mhfs[idx] & ~mask) | val;
                wlc_hw->bandstate[1]->mhfs[idx] =
                    (wlc_hw->bandstate[1]->mhfs[idx] & ~mask) | val;
        }
}

/* set the maccontrol register to desired reset state and
 * initialize the sw cache of the register
 */
static void brcms_c_mctrl_reset(struct brcms_hardware *wlc_hw)
{
        /* IHR accesses are always enabled, PSM disabled, HPS off and WAKE on */
        wlc_hw->maccontrol = 0;
        wlc_hw->suspended_fifos = 0;
        wlc_hw->wake_override = 0;
        wlc_hw->mute_override = 0;
        brcms_b_mctrl(wlc_hw, ~0, MCTL_IHR_EN | MCTL_WAKE);
}

/*
 * write the software state of maccontrol and
 * overrides to the maccontrol register
 */
static void brcms_c_mctrl_write(struct brcms_hardware *wlc_hw)
{
        u32 maccontrol = wlc_hw->maccontrol;

        /* OR in the wake bit if overridden */
        if (wlc_hw->wake_override)
                maccontrol |= MCTL_WAKE;

        /* set AP and INFRA bits for mute if needed */
        if (wlc_hw->mute_override) {
                maccontrol &= ~(MCTL_AP);
                maccontrol |= MCTL_INFRA;
        }

        bcma_write32(wlc_hw->d11core, D11REGOFFS(maccontrol),
                     maccontrol);
}

/* set or clear maccontrol bits */
void brcms_b_mctrl(struct brcms_hardware *wlc_hw, u32 mask, u32 val)
{
        u32 maccontrol;
        u32 new_maccontrol;

        if (val & ~mask)
                return; /* error condition */
        maccontrol = wlc_hw->maccontrol;
        new_maccontrol = (maccontrol & ~mask) | val;

        /* if the new maccontrol value is the same as the old, nothing to do */
        if (new_maccontrol == maccontrol)
                return;

        /* something changed, cache the new value */
        wlc_hw->maccontrol = new_maccontrol;

        /* write the new values with overrides applied */
        brcms_c_mctrl_write(wlc_hw);
}

void brcms_c_ucode_wake_override_set(struct brcms_hardware *wlc_hw,
                                 u32 override_bit)
{
        if (wlc_hw->wake_override || (wlc_hw->maccontrol & MCTL_WAKE)) {
                mboolset(wlc_hw->wake_override, override_bit);
                return;
        }

        mboolset(wlc_hw->wake_override, override_bit);

        brcms_c_mctrl_write(wlc_hw);
        brcms_b_wait_for_wake(wlc_hw);
}

void brcms_c_ucode_wake_override_clear(struct brcms_hardware *wlc_hw,
                                   u32 override_bit)
{
        mboolclr(wlc_hw->wake_override, override_bit);

        if (wlc_hw->wake_override || (wlc_hw->maccontrol & MCTL_WAKE))
                return;

        brcms_c_mctrl_write(wlc_hw);
}

/* When driver needs ucode to stop beaconing, it has to make sure that
 * MCTL_AP is clear and MCTL_INFRA is set
 * Mode           MCTL_AP        MCTL_INFRA
 * AP                1              1
 * STA               0              1 <--- This will ensure no beacons
 * IBSS              0              0
 */
static void brcms_c_ucode_mute_override_set(struct brcms_hardware *wlc_hw)
{
        wlc_hw->mute_override = 1;

        /* if maccontrol already has AP == 0 and INFRA == 1 without this
         * override, then there is no change to write
         */
        if ((wlc_hw->maccontrol & (MCTL_AP | MCTL_INFRA)) == MCTL_INFRA)
                return;

        brcms_c_mctrl_write(wlc_hw);
}

/* Clear the override on AP and INFRA bits */
static void brcms_c_ucode_mute_override_clear(struct brcms_hardware *wlc_hw)
{
        if (wlc_hw->mute_override == 0)
                return;

        wlc_hw->mute_override = 0;

        /* if maccontrol already has AP == 0 and INFRA == 1 without this
         * override, then there is no change to write
         */
        if ((wlc_hw->maccontrol & (MCTL_AP | MCTL_INFRA)) == MCTL_INFRA)
                return;

        brcms_c_mctrl_write(wlc_hw);
}

/*
 * Write a MAC address to the given match reg offset in the RXE match engine.
 */
static void
brcms_b_set_addrmatch(struct brcms_hardware *wlc_hw, int match_reg_offset,
                       const u8 *addr)
{
        struct bcma_device *core = wlc_hw->d11core;
        u16 mac_l;
        u16 mac_m;
        u16 mac_h;

        BCMMSG(wlc_hw->wlc->wiphy, "wl%d: brcms_b_set_addrmatch\n",
                 wlc_hw->unit);

        mac_l = addr[0] | (addr[1] << 8);
        mac_m = addr[2] | (addr[3] << 8);
        mac_h = addr[4] | (addr[5] << 8);

        /* enter the MAC addr into the RXE match registers */
        bcma_write16(core, D11REGOFFS(rcm_ctl),
                     RCM_INC_DATA | match_reg_offset);
        bcma_write16(core, D11REGOFFS(rcm_mat_data), mac_l);
        bcma_write16(core, D11REGOFFS(rcm_mat_data), mac_m);
        bcma_write16(core, D11REGOFFS(rcm_mat_data), mac_h);
}

void
brcms_b_write_template_ram(struct brcms_hardware *wlc_hw, int offset, int len,
                            void *buf)
{
        struct bcma_device *core = wlc_hw->d11core;
        u32 word;
        __le32 word_le;
        __be32 word_be;
        bool be_bit;
        BCMMSG(wlc_hw->wlc->wiphy, "wl%d\n", wlc_hw->unit);

        bcma_write32(core, D11REGOFFS(tplatewrptr), offset);

        /* if MCTL_BIGEND bit set in mac control register,
         * the chip swaps data in fifo, as well as data in
         * template ram
         */
        be_bit = (bcma_read32(core, D11REGOFFS(maccontrol)) & MCTL_BIGEND) != 0;

        while (len > 0) {
                memcpy(&word, buf, sizeof(u32));

                if (be_bit) {
                        word_be = cpu_to_be32(word);
                        word = *(u32 *)&word_be;
                } else {
                        word_le = cpu_to_le32(word);
                        word = *(u32 *)&word_le;
                }

                bcma_write32(core, D11REGOFFS(tplatewrdata), word);

                buf = (u8 *) buf + sizeof(u32);
                len -= sizeof(u32);
        }
}

static void brcms_b_set_cwmin(struct brcms_hardware *wlc_hw, u16 newmin)
{
        wlc_hw->band->CWmin = newmin;

        bcma_write32(wlc_hw->d11core, D11REGOFFS(objaddr),
                     OBJADDR_SCR_SEL | S_DOT11_CWMIN);
        (void)bcma_read32(wlc_hw->d11core, D11REGOFFS(objaddr));
        bcma_write32(wlc_hw->d11core, D11REGOFFS(objdata), newmin);
}

static void brcms_b_set_cwmax(struct brcms_hardware *wlc_hw, u16 newmax)
{
        wlc_hw->band->CWmax = newmax;

        bcma_write32(wlc_hw->d11core, D11REGOFFS(objaddr),
                     OBJADDR_SCR_SEL | S_DOT11_CWMAX);
        (void)bcma_read32(wlc_hw->d11core, D11REGOFFS(objaddr));
        bcma_write32(wlc_hw->d11core, D11REGOFFS(objdata), newmax);
}

void brcms_b_bw_set(struct brcms_hardware *wlc_hw, u16 bw)
{
        bool fastclk;

        /* request FAST clock if not on */
        fastclk = wlc_hw->forcefastclk;
        if (!fastclk)
                brcms_b_clkctl_clk(wlc_hw, BCMA_CLKMODE_FAST);

        wlc_phy_bw_state_set(wlc_hw->band->pi, bw);

        brcms_b_phy_reset(wlc_hw);
        wlc_phy_init(wlc_hw->band->pi, wlc_phy_chanspec_get(wlc_hw->band->pi));

        /* restore the clk */
        if (!fastclk)
                brcms_b_clkctl_clk(wlc_hw, BCMA_CLKMODE_DYNAMIC);
}

static void brcms_b_upd_synthpu(struct brcms_hardware *wlc_hw)
{
        u16 v;
        struct brcms_c_info *wlc = wlc_hw->wlc;
        /* update SYNTHPU_DLY */

        if (BRCMS_ISLCNPHY(wlc->band))
                v = SYNTHPU_DLY_LPPHY_US;
        else if (BRCMS_ISNPHY(wlc->band) && (NREV_GE(wlc->band->phyrev, 3)))
                v = SYNTHPU_DLY_NPHY_US;
        else
                v = SYNTHPU_DLY_BPHY_US;

        brcms_b_write_shm(wlc_hw, M_SYNTHPU_DLY, v);
}

static void brcms_c_ucode_txant_set(struct brcms_hardware *wlc_hw)
{
        u16 phyctl;
        u16 phytxant = wlc_hw->bmac_phytxant;
        u16 mask = PHY_TXC_ANT_MASK;

        /* set the Probe Response frame phy control word */
        phyctl = brcms_b_read_shm(wlc_hw, M_CTXPRS_BLK + C_CTX_PCTLWD_POS);
        phyctl = (phyctl & ~mask) | phytxant;
        brcms_b_write_shm(wlc_hw, M_CTXPRS_BLK + C_CTX_PCTLWD_POS, phyctl);

        /* set the Response (ACK/CTS) frame phy control word */
        phyctl = brcms_b_read_shm(wlc_hw, M_RSP_PCTLWD);
        phyctl = (phyctl & ~mask) | phytxant;
        brcms_b_write_shm(wlc_hw, M_RSP_PCTLWD, phyctl);
}

static u16 brcms_b_ofdm_ratetable_offset(struct brcms_hardware *wlc_hw,
                                         u8 rate)
{
        uint i;
        u8 plcp_rate = 0;
        struct plcp_signal_rate_lookup {
                u8 rate;
                u8 signal_rate;
        };
        /* OFDM RATE sub-field of PLCP SIGNAL field, per 802.11 sec 17.3.4.1 */
        const struct plcp_signal_rate_lookup rate_lookup[] = {
                {BRCM_RATE_6M, 0xB},
                {BRCM_RATE_9M, 0xF},
                {BRCM_RATE_12M, 0xA},
                {BRCM_RATE_18M, 0xE},
                {BRCM_RATE_24M, 0x9},
                {BRCM_RATE_36M, 0xD},
                {BRCM_RATE_48M, 0x8},
                {BRCM_RATE_54M, 0xC}
        };

        for (i = 0; i < ARRAY_SIZE(rate_lookup); i++) {
                if (rate == rate_lookup[i].rate) {
                        plcp_rate = rate_lookup[i].signal_rate;
                        break;
                }
        }

        /* Find the SHM pointer to the rate table entry by looking in the
         * Direct-map Table
         */
        return 2 * brcms_b_read_shm(wlc_hw, M_RT_DIRMAP_A + (plcp_rate * 2));
}

static void brcms_upd_ofdm_pctl1_table(struct brcms_hardware *wlc_hw)
{
        u8 rate;
        u8 rates[8] = {
                BRCM_RATE_6M, BRCM_RATE_9M, BRCM_RATE_12M, BRCM_RATE_18M,
                BRCM_RATE_24M, BRCM_RATE_36M, BRCM_RATE_48M, BRCM_RATE_54M
        };
        u16 entry_ptr;
        u16 pctl1;
        uint i;

        if (!BRCMS_PHY_11N_CAP(wlc_hw->band))
                return;

        /* walk the phy rate table and update the entries */
        for (i = 0; i < ARRAY_SIZE(rates); i++) {
                rate = rates[i];

                entry_ptr = brcms_b_ofdm_ratetable_offset(wlc_hw, rate);

                /* read the SHM Rate Table entry OFDM PCTL1 values */
                pctl1 =
                    brcms_b_read_shm(wlc_hw, entry_ptr + M_RT_OFDM_PCTL1_POS);

                /* modify the value */
                pctl1 &= ~PHY_TXC1_MODE_MASK;
                pctl1 |= (wlc_hw->hw_stf_ss_opmode << PHY_TXC1_MODE_SHIFT);

                /* Update the SHM Rate Table entry OFDM PCTL1 values */
                brcms_b_write_shm(wlc_hw, entry_ptr + M_RT_OFDM_PCTL1_POS,
                                   pctl1);
        }
}

/* band-specific init */
static void brcms_b_bsinit(struct brcms_c_info *wlc, u16 chanspec)
{
        struct brcms_hardware *wlc_hw = wlc->hw;

        BCMMSG(wlc->wiphy, "wl%d: bandunit %d\n", wlc_hw->unit,
                wlc_hw->band->bandunit);

        brcms_c_ucode_bsinit(wlc_hw);

        wlc_phy_init(wlc_hw->band->pi, chanspec);

        brcms_c_ucode_txant_set(wlc_hw);

        /*
         * cwmin is band-specific, update hardware
         * with value for current band
         */
        brcms_b_set_cwmin(wlc_hw, wlc_hw->band->CWmin);
        brcms_b_set_cwmax(wlc_hw, wlc_hw->band->CWmax);

        brcms_b_update_slot_timing(wlc_hw,
                                   wlc_hw->band->bandtype == BRCM_BAND_5G ?
                                   true : wlc_hw->shortslot);

        /* write phytype and phyvers */
        brcms_b_write_shm(wlc_hw, M_PHYTYPE, (u16) wlc_hw->band->phytype);
        brcms_b_write_shm(wlc_hw, M_PHYVER, (u16) wlc_hw->band->phyrev);

        /*
         * initialize the txphyctl1 rate table since
         * shmem is shared between bands
         */
        brcms_upd_ofdm_pctl1_table(wlc_hw);

        brcms_b_upd_synthpu(wlc_hw);
}

/* Perform a soft reset of the PHY PLL */
void brcms_b_core_phypll_reset(struct brcms_hardware *wlc_hw)
{
        BCMMSG(wlc_hw->wlc->wiphy, "wl%d\n", wlc_hw->unit);

        ai_cc_reg(wlc_hw->sih, offsetof(struct chipcregs, chipcontrol_addr),
                  ~0, 0);
        udelay(1);
        ai_cc_reg(wlc_hw->sih, offsetof(struct chipcregs, chipcontrol_data),
                  0x4, 0);
        udelay(1);
        ai_cc_reg(wlc_hw->sih, offsetof(struct chipcregs, chipcontrol_data),
                  0x4, 4);
        udelay(1);
        ai_cc_reg(wlc_hw->sih, offsetof(struct chipcregs, chipcontrol_data),
                  0x4, 0);
        udelay(1);
}

/* light way to turn on phy clock without reset for NPHY only
 *  refer to brcms_b_core_phy_clk for full version
 */
void brcms_b_phyclk_fgc(struct brcms_hardware *wlc_hw, bool clk)
{
        /* support(necessary for NPHY and HYPHY) only */
        if (!BRCMS_ISNPHY(wlc_hw->band))
                return;

        if (ON == clk)
                brcms_b_core_ioctl(wlc_hw, SICF_FGC, SICF_FGC);
        else
                brcms_b_core_ioctl(wlc_hw, SICF_FGC, 0);

}

void brcms_b_macphyclk_set(struct brcms_hardware *wlc_hw, bool clk)
{
        if (ON == clk)
                brcms_b_core_ioctl(wlc_hw, SICF_MPCLKE, SICF_MPCLKE);
        else
                brcms_b_core_ioctl(wlc_hw, SICF_MPCLKE, 0);
}

void brcms_b_phy_reset(struct brcms_hardware *wlc_hw)
{
        struct brcms_phy_pub *pih = wlc_hw->band->pi;
        u32 phy_bw_clkbits;
        bool phy_in_reset = false;

        BCMMSG(wlc_hw->wlc->wiphy, "wl%d\n", wlc_hw->unit);

        if (pih == NULL)
                return;

        phy_bw_clkbits = wlc_phy_clk_bwbits(wlc_hw->band->pi);

        /* Specific reset sequence required for NPHY rev 3 and 4 */
        if (BRCMS_ISNPHY(wlc_hw->band) && NREV_GE(wlc_hw->band->phyrev, 3) &&
            NREV_LE(wlc_hw->band->phyrev, 4)) {
                /* Set the PHY bandwidth */
                brcms_b_core_ioctl(wlc_hw, SICF_BWMASK, phy_bw_clkbits);

                udelay(1);

                /* Perform a soft reset of the PHY PLL */
                brcms_b_core_phypll_reset(wlc_hw);

                /* reset the PHY */
                brcms_b_core_ioctl(wlc_hw, (SICF_PRST | SICF_PCLKE),
                                   (SICF_PRST | SICF_PCLKE));
                phy_in_reset = true;
        } else {
                brcms_b_core_ioctl(wlc_hw,
                                   (SICF_PRST | SICF_PCLKE | SICF_BWMASK),
                                   (SICF_PRST | SICF_PCLKE | phy_bw_clkbits));
        }

        udelay(2);
        brcms_b_core_phy_clk(wlc_hw, ON);

        if (pih)
                wlc_phy_anacore(pih, ON);
}

/* switch to and initialize new band */
static void brcms_b_setband(struct brcms_hardware *wlc_hw, uint bandunit,
                            u16 chanspec) {
        struct brcms_c_info *wlc = wlc_hw->wlc;
        u32 macintmask;

        /* Enable the d11 core before accessing it */
        if (!bcma_core_is_enabled(wlc_hw->d11core)) {
                bcma_core_enable(wlc_hw->d11core, 0);
                brcms_c_mctrl_reset(wlc_hw);
        }

        macintmask = brcms_c_setband_inact(wlc, bandunit);

        if (!wlc_hw->up)
                return;

        brcms_b_core_phy_clk(wlc_hw, ON);

        /* band-specific initializations */
        brcms_b_bsinit(wlc, chanspec);

        /*
         * If there are any pending software interrupt bits,
         * then replace these with a harmless nonzero value
         * so brcms_c_dpc() will re-enable interrupts when done.
         */
        if (wlc->macintstatus)
                wlc->macintstatus = MI_DMAINT;

        /* restore macintmask */
        brcms_intrsrestore(wlc->wl, macintmask);

        /* ucode should still be suspended.. */
        WARN_ON((bcma_read32(wlc_hw->d11core, D11REGOFFS(maccontrol)) &
                 MCTL_EN_MAC) != 0);
}

static bool brcms_c_isgoodchip(struct brcms_hardware *wlc_hw)
{

        /* reject unsupported corerev */
        if (!CONF_HAS(D11CONF, wlc_hw->corerev)) {
                wiphy_err(wlc_hw->wlc->wiphy, "unsupported core rev %d\n",
                          wlc_hw->corerev);
                return false;
        }

        return true;
}

/* Validate some board info parameters */
static bool brcms_c_validboardtype(struct brcms_hardware *wlc_hw)
{
        uint boardrev = wlc_hw->boardrev;

        /* 4 bits each for board type, major, minor, and tiny version */
        uint brt = (boardrev & 0xf000) >> 12;
        uint b0 = (boardrev & 0xf00) >> 8;
        uint b1 = (boardrev & 0xf0) >> 4;
        uint b2 = boardrev & 0xf;

        /* voards from other vendors are always considered valid */
        if (ai_get_boardvendor(wlc_hw->sih) != PCI_VENDOR_ID_BROADCOM)
                return true;

        /* do some boardrev sanity checks when boardvendor is Broadcom */
        if (boardrev == 0)
                return false;

        if (boardrev <= 0xff)
                return true;

        if ((brt > 2) || (brt == 0) || (b0 > 9) || (b0 == 0) || (b1 > 9)
                || (b2 > 9))
                return false;

        return true;
}

static void brcms_c_get_macaddr(struct brcms_hardware *wlc_hw, u8 etheraddr[ETH_ALEN])
{
        struct ssb_sprom *sprom = &wlc_hw->d11core->bus->sprom;

        /* If macaddr exists, use it (Sromrev4, CIS, ...). */
        if (!is_zero_ether_addr(sprom->il0mac)) {
                memcpy(etheraddr, sprom->il0mac, 6);
                return;
        }

        if (wlc_hw->_nbands > 1)
                memcpy(etheraddr, sprom->et1mac, 6);
        else
                memcpy(etheraddr, sprom->il0mac, 6);
}

/* power both the pll and external oscillator on/off */
static void brcms_b_xtal(struct brcms_hardware *wlc_hw, bool want)
{
        BCMMSG(wlc_hw->wlc->wiphy, "wl%d: want %d\n", wlc_hw->unit, want);

        /*
         * dont power down if plldown is false or
         * we must poll hw radio disable
         */
        if (!want && wlc_hw->pllreq)
                return;

        wlc_hw->sbclk = want;
        if (!wlc_hw->sbclk) {
                wlc_hw->clk = false;
                if (wlc_hw->band && wlc_hw->band->pi)
                        wlc_phy_hw_clk_state_upd(wlc_hw->band->pi, false);
        }
}

/*
 * Return true if radio is disabled, otherwise false.
 * hw radio disable signal is an external pin, users activate it asynchronously
 * this function could be called when driver is down and w/o clock
 * it operates on different registers depending on corerev and boardflag.
 */
static bool brcms_b_radio_read_hwdisabled(struct brcms_hardware *wlc_hw)
{
        bool v, clk, xtal;
        u32 flags = 0;

        xtal = wlc_hw->sbclk;
        if (!xtal)
                brcms_b_xtal(wlc_hw, ON);

        /* may need to take core out of reset first */
        clk = wlc_hw->clk;
        if (!clk) {
                /*
                 * mac no longer enables phyclk automatically when driver
                 * accesses phyreg throughput mac. This can be skipped since
                 * only mac reg is accessed below
                 */
                if (D11REV_GE(wlc_hw->corerev, 18))
                        flags |= SICF_PCLKE;

                /*
                 * TODO: test suspend/resume
                 *
                 * AI chip doesn't restore bar0win2 on
                 * hibernation/resume, need sw fixup
                 */

                bcma_core_enable(wlc_hw->d11core, flags);
                brcms_c_mctrl_reset(wlc_hw);
        }

        v = ((bcma_read32(wlc_hw->d11core,
                          D11REGOFFS(phydebug)) & PDBG_RFD) != 0);

        /* put core back into reset */
        if (!clk)
                bcma_core_disable(wlc_hw->d11core, 0);

        if (!xtal)
                brcms_b_xtal(wlc_hw, OFF);

        return v;
}

static bool wlc_dma_rxreset(struct brcms_hardware *wlc_hw, uint fifo)
{
        struct dma_pub *di = wlc_hw->di[fifo];
        return dma_rxreset(di);
}

/* d11 core reset
 *   ensure fask clock during reset
 *   reset dma
 *   reset d11(out of reset)
 *   reset phy(out of reset)
 *   clear software macintstatus for fresh new start
 * one testing hack wlc_hw->noreset will bypass the d11/phy reset
 */
void brcms_b_corereset(struct brcms_hardware *wlc_hw, u32 flags)

{
        uint i;
        bool fastclk;

        if (flags == BRCMS_USE_COREFLAGS)
                flags = (wlc_hw->band->pi ? wlc_hw->band->core_flags : 0);

        BCMMSG(wlc_hw->wlc->wiphy, "wl%d\n", wlc_hw->unit);

        /* request FAST clock if not on  */
        fastclk = wlc_hw->forcefastclk;
        if (!fastclk)
                brcms_b_clkctl_clk(wlc_hw, BCMA_CLKMODE_FAST);

        /* reset the dma engines except first time thru */
        if (bcma_core_is_enabled(wlc_hw->d11core)) {
                for (i = 0; i < NFIFO; i++)
                        if ((wlc_hw->di[i]) && (!dma_txreset(wlc_hw->di[i])))
                                wiphy_err(wlc_hw->wlc->wiphy, "wl%d: %s: "
                                          "dma_txreset[%d]: cannot stop dma\n",
                                           wlc_hw->unit, __func__, i);

                if ((wlc_hw->di[RX_FIFO])
                    && (!wlc_dma_rxreset(wlc_hw, RX_FIFO)))
                        wiphy_err(wlc_hw->wlc->wiphy, "wl%d: %s: dma_rxreset"
                                  "[%d]: cannot stop dma\n",
                                  wlc_hw->unit, __func__, RX_FIFO);
        }
        /* if noreset, just stop the psm and return */
        if (wlc_hw->noreset) {
                wlc_hw->wlc->macintstatus = 0;  /* skip wl_dpc after down */
                brcms_b_mctrl(wlc_hw, MCTL_PSM_RUN | MCTL_EN_MAC, 0);
                return;
        }

        /*
         * mac no longer enables phyclk automatically when driver accesses
         * phyreg throughput mac, AND phy_reset is skipped at early stage when
         * band->pi is invalid. need to enable PHY CLK
         */
        if (D11REV_GE(wlc_hw->corerev, 18))
                flags |= SICF_PCLKE;

        /*
         * reset the core
         * In chips with PMU, the fastclk request goes through d11 core
         * reg 0x1e0, which is cleared by the core_reset. have to re-request it.
         *
         * This adds some delay and we can optimize it by also requesting
         * fastclk through chipcommon during this period if necessary. But
         * that has to work coordinate with other driver like mips/arm since
         * they may touch chipcommon as well.
         */
        wlc_hw->clk = false;
        bcma_core_enable(wlc_hw->d11core, flags);
        wlc_hw->clk = true;
        if (wlc_hw->band && wlc_hw->band->pi)
                wlc_phy_hw_clk_state_upd(wlc_hw->band->pi, true);

        brcms_c_mctrl_reset(wlc_hw);

        if (ai_get_cccaps(wlc_hw->sih) & CC_CAP_PMU)
                brcms_b_clkctl_clk(wlc_hw, BCMA_CLKMODE_FAST);

        brcms_b_phy_reset(wlc_hw);

        /* turn on PHY_PLL */
        brcms_b_core_phypll_ctl(wlc_hw, true);

        /* clear sw intstatus */
        wlc_hw->wlc->macintstatus = 0;

        /* restore the clk setting */
        if (!fastclk)
                brcms_b_clkctl_clk(wlc_hw, BCMA_CLKMODE_DYNAMIC);
}

/* txfifo sizes needs to be modified(increased) since the newer cores
 * have more memory.
 */
static void brcms_b_corerev_fifofixup(struct brcms_hardware *wlc_hw)
{
        struct bcma_device *core = wlc_hw->d11core;
        u16 fifo_nu;
        u16 txfifo_startblk = TXFIFO_START_BLK, txfifo_endblk;
        u16 txfifo_def, txfifo_def1;
        u16 txfifo_cmd;

        /* tx fifos start at TXFIFO_START_BLK from the Base address */
        txfifo_startblk = TXFIFO_START_BLK;

        /* sequence of operations:  reset fifo, set fifo size, reset fifo */
        for (fifo_nu = 0; fifo_nu < NFIFO; fifo_nu++) {

                txfifo_endblk = txfifo_startblk + wlc_hw->xmtfifo_sz[fifo_nu];
                txfifo_def = (txfifo_startblk & 0xff) |
                    (((txfifo_endblk - 1) & 0xff) << TXFIFO_FIFOTOP_SHIFT);
                txfifo_def1 = ((txfifo_startblk >> 8) & 0x1) |
                    ((((txfifo_endblk -
                        1) >> 8) & 0x1) << TXFIFO_FIFOTOP_SHIFT);
                txfifo_cmd =
                    TXFIFOCMD_RESET_MASK | (fifo_nu << TXFIFOCMD_FIFOSEL_SHIFT);

                bcma_write16(core, D11REGOFFS(xmtfifocmd), txfifo_cmd);
                bcma_write16(core, D11REGOFFS(xmtfifodef), txfifo_def);
                bcma_write16(core, D11REGOFFS(xmtfifodef1), txfifo_def1);

                bcma_write16(core, D11REGOFFS(xmtfifocmd), txfifo_cmd);

                txfifo_startblk += wlc_hw->xmtfifo_sz[fifo_nu];
        }
        /*
         * need to propagate to shm location to be in sync since ucode/hw won't
         * do this
         */
        brcms_b_write_shm(wlc_hw, M_FIFOSIZE0,
                           wlc_hw->xmtfifo_sz[TX_AC_BE_FIFO]);
        brcms_b_write_shm(wlc_hw, M_FIFOSIZE1,
                           wlc_hw->xmtfifo_sz[TX_AC_VI_FIFO]);
        brcms_b_write_shm(wlc_hw, M_FIFOSIZE2,
                           ((wlc_hw->xmtfifo_sz[TX_AC_VO_FIFO] << 8) | wlc_hw->
                            xmtfifo_sz[TX_AC_BK_FIFO]));
        brcms_b_write_shm(wlc_hw, M_FIFOSIZE3,
                           ((wlc_hw->xmtfifo_sz[TX_ATIM_FIFO] << 8) | wlc_hw->
                            xmtfifo_sz[TX_BCMC_FIFO]));
}

/* This function is used for changing the tsf frac register
 * If spur avoidance mode is off, the mac freq will be 80/120/160Mhz
 * If spur avoidance mode is on1, the mac freq will be 82/123/164Mhz
 * If spur avoidance mode is on2, the mac freq will be 84/126/168Mhz
 * HTPHY Formula is 2^26/freq(MHz) e.g.
 * For spuron2 - 126MHz -> 2^26/126 = 532610.0
 *  - 532610 = 0x82082 => tsf_clk_frac_h = 0x8, tsf_clk_frac_l = 0x2082
 * For spuron: 123MHz -> 2^26/123    = 545600.5
 *  - 545601 = 0x85341 => tsf_clk_frac_h = 0x8, tsf_clk_frac_l = 0x5341
 * For spur off: 120MHz -> 2^26/120    = 559240.5
 *  - 559241 = 0x88889 => tsf_clk_frac_h = 0x8, tsf_clk_frac_l = 0x8889
 */

void brcms_b_switch_macfreq(struct brcms_hardware *wlc_hw, u8 spurmode)
{
        struct bcma_device *core = wlc_hw->d11core;

        if ((ai_get_chip_id(wlc_hw->sih) == BCMA_CHIP_ID_BCM43224) ||
            (ai_get_chip_id(wlc_hw->sih) == BCMA_CHIP_ID_BCM43225)) {
                if (spurmode == WL_SPURAVOID_ON2) {     /* 126Mhz */
                        bcma_write16(core, D11REGOFFS(tsf_clk_frac_l), 0x2082);
                        bcma_write16(core, D11REGOFFS(tsf_clk_frac_h), 0x8);
                } else if (spurmode == WL_SPURAVOID_ON1) {      /* 123Mhz */
                        bcma_write16(core, D11REGOFFS(tsf_clk_frac_l), 0x5341);
                        bcma_write16(core, D11REGOFFS(tsf_clk_frac_h), 0x8);
                } else {        /* 120Mhz */
                        bcma_write16(core, D11REGOFFS(tsf_clk_frac_l), 0x8889);
                        bcma_write16(core, D11REGOFFS(tsf_clk_frac_h), 0x8);
                }
        } else if (BRCMS_ISLCNPHY(wlc_hw->band)) {
                if (spurmode == WL_SPURAVOID_ON1) {     /* 82Mhz */
                        bcma_write16(core, D11REGOFFS(tsf_clk_frac_l), 0x7CE0);
                        bcma_write16(core, D11REGOFFS(tsf_clk_frac_h), 0xC);
                } else {        /* 80Mhz */
                        bcma_write16(core, D11REGOFFS(tsf_clk_frac_l), 0xCCCD);
                        bcma_write16(core, D11REGOFFS(tsf_clk_frac_h), 0xC);
                }
        }
}

/* Initialize GPIOs that are controlled by D11 core */
static void brcms_c_gpio_init(struct brcms_c_info *wlc)
{
        struct brcms_hardware *wlc_hw = wlc->hw;
        u32 gc, gm;

        /* use GPIO select 0 to get all gpio signals from the gpio out reg */
        brcms_b_mctrl(wlc_hw, MCTL_GPOUT_SEL_MASK, 0);

        /*
         * Common GPIO setup:
         *      G0 = LED 0 = WLAN Activity
         *      G1 = LED 1 = WLAN 2.4 GHz Radio State
         *      G2 = LED 2 = WLAN 5 GHz Radio State
         *      G4 = radio disable input (HI enabled, LO disabled)
         */

        gc = gm = 0;

        /* Allocate GPIOs for mimo antenna diversity feature */
        if (wlc_hw->antsel_type == ANTSEL_2x3) {
                /* Enable antenna diversity, use 2x3 mode */
                brcms_b_mhf(wlc_hw, MHF3, MHF3_ANTSEL_EN,
                             MHF3_ANTSEL_EN, BRCM_BAND_ALL);
                brcms_b_mhf(wlc_hw, MHF3, MHF3_ANTSEL_MODE,
                             MHF3_ANTSEL_MODE, BRCM_BAND_ALL);

                /* init superswitch control */
                wlc_phy_antsel_init(wlc_hw->band->pi, false);

        } else if (wlc_hw->antsel_type == ANTSEL_2x4) {
                gm |= gc |= (BOARD_GPIO_12 | BOARD_GPIO_13);
                /*
                 * The board itself is powered by these GPIOs
                 * (when not sending pattern) so set them high
                 */
                bcma_set16(wlc_hw->d11core, D11REGOFFS(psm_gpio_oe),
                           (BOARD_GPIO_12 | BOARD_GPIO_13));
                bcma_set16(wlc_hw->d11core, D11REGOFFS(psm_gpio_out),
                           (BOARD_GPIO_12 | BOARD_GPIO_13));

                /* Enable antenna diversity, use 2x4 mode */
                brcms_b_mhf(wlc_hw, MHF3, MHF3_ANTSEL_EN,
                             MHF3_ANTSEL_EN, BRCM_BAND_ALL);
                brcms_b_mhf(wlc_hw, MHF3, MHF3_ANTSEL_MODE, 0,
                             BRCM_BAND_ALL);

                /* Configure the desired clock to be 4Mhz */
                brcms_b_write_shm(wlc_hw, M_ANTSEL_CLKDIV,
                                   ANTSEL_CLKDIV_4MHZ);
        }

        /*
         * gpio 9 controls the PA. ucode is responsible
         * for wiggling out and oe
         */
        if (wlc_hw->boardflags & BFL_PACTRL)
                gm |= gc |= BOARD_GPIO_PACTRL;

        /* apply to gpiocontrol register */
        bcma_chipco_gpio_control(&wlc_hw->d11core->bus->drv_cc, gm, gc);
}

static void brcms_ucode_write(struct brcms_hardware *wlc_hw,
                              const __le32 ucode[], const size_t nbytes)
{
        struct bcma_device *core = wlc_hw->d11core;
        uint i;
        uint count;

        BCMMSG(wlc_hw->wlc->wiphy, "wl%d\n", wlc_hw->unit);

        count = (nbytes / sizeof(u32));

        bcma_write32(core, D11REGOFFS(objaddr),
                     OBJADDR_AUTO_INC | OBJADDR_UCM_SEL);
        (void)bcma_read32(core, D11REGOFFS(objaddr));
        for (i = 0; i < count; i++)
                bcma_write32(core, D11REGOFFS(objdata), le32_to_cpu(ucode[i]));

}

static void brcms_ucode_download(struct brcms_hardware *wlc_hw)
{
        struct brcms_c_info *wlc;
        struct brcms_ucode *ucode = &wlc_hw->wlc->wl->ucode;

        wlc = wlc_hw->wlc;

        if (wlc_hw->ucode_loaded)
                return;

        if (D11REV_IS(wlc_hw->corerev, 23)) {
                if (BRCMS_ISNPHY(wlc_hw->band)) {
                        brcms_ucode_write(wlc_hw, ucode->bcm43xx_16_mimo,
                                          ucode->bcm43xx_16_mimosz);
                        wlc_hw->ucode_loaded = true;
                } else
                        wiphy_err(wlc->wiphy, "%s: wl%d: unsupported phy in "
                                  "corerev %d\n",
                                  __func__, wlc_hw->unit, wlc_hw->corerev);
        } else if (D11REV_IS(wlc_hw->corerev, 24)) {
                if (BRCMS_ISLCNPHY(wlc_hw->band)) {
                        brcms_ucode_write(wlc_hw, ucode->bcm43xx_24_lcn,
                                          ucode->bcm43xx_24_lcnsz);
                        wlc_hw->ucode_loaded = true;
                } else {
                        wiphy_err(wlc->wiphy, "%s: wl%d: unsupported phy in "
                                  "corerev %d\n",
                                  __func__, wlc_hw->unit, wlc_hw->corerev);
                }
        }
}

void brcms_b_txant_set(struct brcms_hardware *wlc_hw, u16 phytxant)
{
        /* update sw state */
        wlc_hw->bmac_phytxant = phytxant;

        /* push to ucode if up */
        if (!wlc_hw->up)
                return;
        brcms_c_ucode_txant_set(wlc_hw);

}

u16 brcms_b_get_txant(struct brcms_hardware *wlc_hw)
{
        return (u16) wlc_hw->wlc->stf->txant;
}

void brcms_b_antsel_type_set(struct brcms_hardware *wlc_hw, u8 antsel_type)
{
        wlc_hw->antsel_type = antsel_type;

        /* Update the antsel type for phy module to use */
        wlc_phy_antsel_type_set(wlc_hw->band->pi, antsel_type);
}

static void brcms_b_fifoerrors(struct brcms_hardware *wlc_hw)
{
        bool fatal = false;
        uint unit;
        uint intstatus, idx;
        struct bcma_device *core = wlc_hw->d11core;
        struct wiphy *wiphy = wlc_hw->wlc->wiphy;

        unit = wlc_hw->unit;

        for (idx = 0; idx < NFIFO; idx++) {
                /* read intstatus register and ignore any non-error bits */
                intstatus =
                        bcma_read32(core,
                                    D11REGOFFS(intctrlregs[idx].intstatus)) &
                        I_ERRORS;
                if (!intstatus)
                        continue;

                BCMMSG(wlc_hw->wlc->wiphy, "wl%d: intstatus%d 0x%x\n",
                        unit, idx, intstatus);

                if (intstatus & I_RO) {
                        wiphy_err(wiphy, "wl%d: fifo %d: receive fifo "
                                  "overflow\n", unit, idx);
                        fatal = true;
                }

                if (intstatus & I_PC) {
                        wiphy_err(wiphy, "wl%d: fifo %d: descriptor error\n",
                                 unit, idx);
                        fatal = true;
                }

                if (intstatus & I_PD) {
                        wiphy_err(wiphy, "wl%d: fifo %d: data error\n", unit,
                                  idx);
                        fatal = true;
                }

                if (intstatus & I_DE) {
                        wiphy_err(wiphy, "wl%d: fifo %d: descriptor protocol "
                                  "error\n", unit, idx);
                        fatal = true;
                }

                if (intstatus & I_RU)
                        wiphy_err(wiphy, "wl%d: fifo %d: receive descriptor "
                                  "underflow\n", idx, unit);

                if (intstatus & I_XU) {
                        wiphy_err(wiphy, "wl%d: fifo %d: transmit fifo "
                                  "underflow\n", idx, unit);
                        fatal = true;
                }

                if (fatal) {
                        brcms_fatal_error(wlc_hw->wlc->wl); /* big hammer */
                        break;
                } else
                        bcma_write32(core,
                                     D11REGOFFS(intctrlregs[idx].intstatus),
                                     intstatus);
        }
}

void brcms_c_intrson(struct brcms_c_info *wlc)
{
        struct brcms_hardware *wlc_hw = wlc->hw;
        wlc->macintmask = wlc->defmacintmask;
        bcma_write32(wlc_hw->d11core, D11REGOFFS(macintmask), wlc->macintmask);
}

u32 brcms_c_intrsoff(struct brcms_c_info *wlc)
{
        struct brcms_hardware *wlc_hw = wlc->hw;
        u32 macintmask;

        if (!wlc_hw->clk)
                return 0;

        macintmask = wlc->macintmask;   /* isr can still happen */

        bcma_write32(wlc_hw->d11core, D11REGOFFS(macintmask), 0);
        (void)bcma_read32(wlc_hw->d11core, D11REGOFFS(macintmask));
        udelay(1);              /* ensure int line is no longer driven */
        wlc->macintmask = 0;

        /* return previous macintmask; resolve race between us and our isr */
        return wlc->macintstatus ? 0 : macintmask;
}

void brcms_c_intrsrestore(struct brcms_c_info *wlc, u32 macintmask)
{
        struct brcms_hardware *wlc_hw = wlc->hw;
        if (!wlc_hw->clk)
                return;

        wlc->macintmask = macintmask;
        bcma_write32(wlc_hw->d11core, D11REGOFFS(macintmask), wlc->macintmask);
}

/* assumes that the d11 MAC is enabled */
static void brcms_b_tx_fifo_suspend(struct brcms_hardware *wlc_hw,
                                    uint tx_fifo)
{
        u8 fifo = 1 << tx_fifo;

        /* Two clients of this code, 11h Quiet period and scanning. */

        /* only suspend if not already suspended */
        if ((wlc_hw->suspended_fifos & fifo) == fifo)
                return;

        /* force the core awake only if not already */
        if (wlc_hw->suspended_fifos == 0)
                brcms_c_ucode_wake_override_set(wlc_hw,
                                                BRCMS_WAKE_OVERRIDE_TXFIFO);

        wlc_hw->suspended_fifos |= fifo;

        if (wlc_hw->di[tx_fifo]) {
                /*
                 * Suspending AMPDU transmissions in the middle can cause
                 * underflow which may result in mismatch between ucode and
                 * driver so suspend the mac before suspending the FIFO
                 */
                if (BRCMS_PHY_11N_CAP(wlc_hw->band))
                        brcms_c_suspend_mac_and_wait(wlc_hw->wlc);

                dma_txsuspend(wlc_hw->di[tx_fifo]);

                if (BRCMS_PHY_11N_CAP(wlc_hw->band))
                        brcms_c_enable_mac(wlc_hw->wlc);
        }
}

static void brcms_b_tx_fifo_resume(struct brcms_hardware *wlc_hw,
                                   uint tx_fifo)
{
        /* BMAC_NOTE: BRCMS_TX_FIFO_ENAB is done in brcms_c_dpc() for DMA case
         * but need to be done here for PIO otherwise the watchdog will catch
         * the inconsistency and fire
         */
        /* Two clients of this code, 11h Quiet period and scanning. */
        if (wlc_hw->di[tx_fifo])
                dma_txresume(wlc_hw->di[tx_fifo]);

        /* allow core to sleep again */
        if (wlc_hw->suspended_fifos == 0)
                return;
        else {
                wlc_hw->suspended_fifos &= ~(1 << tx_fifo);
                if (wlc_hw->suspended_fifos == 0)
                        brcms_c_ucode_wake_override_clear(wlc_hw,
                                                BRCMS_WAKE_OVERRIDE_TXFIFO);
        }
}

/* precondition: requires the mac core to be enabled */
static void brcms_b_mute(struct brcms_hardware *wlc_hw, bool mute_tx)
{
        static const u8 null_ether_addr[ETH_ALEN] = {0, 0, 0, 0, 0, 0};

        if (mute_tx) {
                /* suspend tx fifos */
                brcms_b_tx_fifo_suspend(wlc_hw, TX_DATA_FIFO);
                brcms_b_tx_fifo_suspend(wlc_hw, TX_CTL_FIFO);
                brcms_b_tx_fifo_suspend(wlc_hw, TX_AC_BK_FIFO);
                brcms_b_tx_fifo_suspend(wlc_hw, TX_AC_VI_FIFO);

                /* zero the address match register so we do not send ACKs */
                brcms_b_set_addrmatch(wlc_hw, RCM_MAC_OFFSET,
                                       null_ether_addr);
        } else {
                /* resume tx fifos */
                brcms_b_tx_fifo_resume(wlc_hw, TX_DATA_FIFO);
                brcms_b_tx_fifo_resume(wlc_hw, TX_CTL_FIFO);
                brcms_b_tx_fifo_resume(wlc_hw, TX_AC_BK_FIFO);
                brcms_b_tx_fifo_resume(wlc_hw, TX_AC_VI_FIFO);

                /* Restore address */
                brcms_b_set_addrmatch(wlc_hw, RCM_MAC_OFFSET,
                                       wlc_hw->etheraddr);
        }

        wlc_phy_mute_upd(wlc_hw->band->pi, mute_tx, 0);

        if (mute_tx)
                brcms_c_ucode_mute_override_set(wlc_hw);
        else
                brcms_c_ucode_mute_override_clear(wlc_hw);
}

void
brcms_c_mute(struct brcms_c_info *wlc, bool mute_tx)
{
        brcms_b_mute(wlc->hw, mute_tx);
}

/*
 * Read and clear macintmask and macintstatus and intstatus registers.
 * This routine should be called with interrupts off
 * Return:
 *   -1 if brcms_deviceremoved(wlc) evaluates to true;
 *   0 if the interrupt is not for us, or we are in some special cases;
 *   device interrupt status bits otherwise.
 */
static inline u32 wlc_intstatus(struct brcms_c_info *wlc, bool in_isr)
{
        struct brcms_hardware *wlc_hw = wlc->hw;
        struct bcma_device *core = wlc_hw->d11core;
        u32 macintstatus;

        /* macintstatus includes a DMA interrupt summary bit */
        macintstatus = bcma_read32(core, D11REGOFFS(macintstatus));

        BCMMSG(wlc->wiphy, "wl%d: macintstatus: 0x%x\n", wlc_hw->unit,
                 macintstatus);

        /* detect cardbus removed, in power down(suspend) and in reset */
        if (brcms_deviceremoved(wlc))
                return -1;

        /* brcms_deviceremoved() succeeds even when the core is still resetting,
         * handle that case here.
         */
        if (macintstatus == 0xffffffff)
                return 0;

        /* defer unsolicited interrupts */
        macintstatus &= (in_isr ? wlc->macintmask : wlc->defmacintmask);

        /* if not for us */
        if (macintstatus == 0)
                return 0;

        /* interrupts are already turned off for CFE build
         * Caution: For CFE Turning off the interrupts again has some undesired
         * consequences
         */
        /* turn off the interrupts */
        bcma_write32(core, D11REGOFFS(macintmask), 0);
        (void)bcma_read32(core, D11REGOFFS(macintmask));
        wlc->macintmask = 0;

        /* clear device interrupts */
        bcma_write32(core, D11REGOFFS(macintstatus), macintstatus);

        /* MI_DMAINT is indication of non-zero intstatus */
        if (macintstatus & MI_DMAINT)
                /*
                 * only fifo interrupt enabled is I_RI in
                 * RX_FIFO. If MI_DMAINT is set, assume it
                 * is set and clear the interrupt.
                 */
                bcma_write32(core, D11REGOFFS(intctrlregs[RX_FIFO].intstatus),
                             DEF_RXINTMASK);

        return macintstatus;
}

/* Update wlc->macintstatus and wlc->intstatus[]. */
/* Return true if they are updated successfully. false otherwise */
bool brcms_c_intrsupd(struct brcms_c_info *wlc)
{
        u32 macintstatus;

        /* read and clear macintstatus and intstatus registers */
        macintstatus = wlc_intstatus(wlc, false);

        /* device is removed */
        if (macintstatus == 0xffffffff)
                return false;

        /* update interrupt status in software */
        wlc->macintstatus |= macintstatus;

        return true;
}

/*
 * First-level interrupt processing.
 * Return true if this was our interrupt, false otherwise.
 * *wantdpc will be set to true if further brcms_c_dpc() processing is required,
 * false otherwise.
 */
bool brcms_c_isr(struct brcms_c_info *wlc, bool *wantdpc)
{
        struct brcms_hardware *wlc_hw = wlc->hw;
        u32 macintstatus;

        *wantdpc = false;

        if (!wlc_hw->up || !wlc->macintmask)
                return false;

        /* read and clear macintstatus and intstatus registers */
        macintstatus = wlc_intstatus(wlc, true);

        if (macintstatus == 0xffffffff)
                wiphy_err(wlc->wiphy, "DEVICEREMOVED detected in the ISR code"
                          " path\n");

        /* it is not for us */
        if (macintstatus == 0)
                return false;

        *wantdpc = true;

        /* save interrupt status bits */
        wlc->macintstatus = macintstatus;

        return true;

}

void brcms_c_suspend_mac_and_wait(struct brcms_c_info *wlc)
{
        struct brcms_hardware *wlc_hw = wlc->hw;
        struct bcma_device *core = wlc_hw->d11core;
        u32 mc, mi;
        struct wiphy *wiphy = wlc->wiphy;

        BCMMSG(wlc->wiphy, "wl%d: bandunit %d\n", wlc_hw->unit,
                wlc_hw->band->bandunit);

        /*
         * Track overlapping suspend requests
         */
        wlc_hw->mac_suspend_depth++;
        if (wlc_hw->mac_suspend_depth > 1)
                return;

        /* force the core awake */
        brcms_c_ucode_wake_override_set(wlc_hw, BRCMS_WAKE_OVERRIDE_MACSUSPEND);

        mc = bcma_read32(core, D11REGOFFS(maccontrol));

        if (mc == 0xffffffff) {
                wiphy_err(wiphy, "wl%d: %s: dead chip\n", wlc_hw->unit,
                          __func__);
                brcms_down(wlc->wl);
                return;
        }
        WARN_ON(mc & MCTL_PSM_JMP_0);
        WARN_ON(!(mc & MCTL_PSM_RUN));
        WARN_ON(!(mc & MCTL_EN_MAC));

        mi = bcma_read32(core, D11REGOFFS(macintstatus));
        if (mi == 0xffffffff) {
                wiphy_err(wiphy, "wl%d: %s: dead chip\n", wlc_hw->unit,
                          __func__);
                brcms_down(wlc->wl);
                return;
        }
        WARN_ON(mi & MI_MACSSPNDD);

        brcms_b_mctrl(wlc_hw, MCTL_EN_MAC, 0);

        SPINWAIT(!(bcma_read32(core, D11REGOFFS(macintstatus)) & MI_MACSSPNDD),
                 BRCMS_MAX_MAC_SUSPEND);

        if (!(bcma_read32(core, D11REGOFFS(macintstatus)) & MI_MACSSPNDD)) {
                wiphy_err(wiphy, "wl%d: wlc_suspend_mac_and_wait: waited %d uS"
                          " and MI_MACSSPNDD is still not on.\n",
                          wlc_hw->unit, BRCMS_MAX_MAC_SUSPEND);
                wiphy_err(wiphy, "wl%d: psmdebug 0x%08x, phydebug 0x%08x, "
                          "psm_brc 0x%04x\n", wlc_hw->unit,
                          bcma_read32(core, D11REGOFFS(psmdebug)),
                          bcma_read32(core, D11REGOFFS(phydebug)),
                          bcma_read16(core, D11REGOFFS(psm_brc)));
        }

        mc = bcma_read32(core, D11REGOFFS(maccontrol));
        if (mc == 0xffffffff) {
                wiphy_err(wiphy, "wl%d: %s: dead chip\n", wlc_hw->unit,
                          __func__);
                brcms_down(wlc->wl);
                return;
        }
        WARN_ON(mc & MCTL_PSM_JMP_0);
        WARN_ON(!(mc & MCTL_PSM_RUN));
        WARN_ON(mc & MCTL_EN_MAC);
}

void brcms_c_enable_mac(struct brcms_c_info *wlc)
{
        struct brcms_hardware *wlc_hw = wlc->hw;
        struct bcma_device *core = wlc_hw->d11core;
        u32 mc, mi;

        BCMMSG(wlc->wiphy, "wl%d: bandunit %d\n", wlc_hw->unit,
                wlc->band->bandunit);

        /*
         * Track overlapping suspend requests
         */
        wlc_hw->mac_suspend_depth--;
        if (wlc_hw->mac_suspend_depth > 0)
                return;

        mc = bcma_read32(core, D11REGOFFS(maccontrol));
        WARN_ON(mc & MCTL_PSM_JMP_0);
        WARN_ON(mc & MCTL_EN_MAC);
        WARN_ON(!(mc & MCTL_PSM_RUN));

        brcms_b_mctrl(wlc_hw, MCTL_EN_MAC, MCTL_EN_MAC);
        bcma_write32(core, D11REGOFFS(macintstatus), MI_MACSSPNDD);

        mc = bcma_read32(core, D11REGOFFS(maccontrol));
        WARN_ON(mc & MCTL_PSM_JMP_0);
        WARN_ON(!(mc & MCTL_EN_MAC));
        WARN_ON(!(mc & MCTL_PSM_RUN));

        mi = bcma_read32(core, D11REGOFFS(macintstatus));
        WARN_ON(mi & MI_MACSSPNDD);

        brcms_c_ucode_wake_override_clear(wlc_hw,
                                          BRCMS_WAKE_OVERRIDE_MACSUSPEND);
}

void brcms_b_band_stf_ss_set(struct brcms_hardware *wlc_hw, u8 stf_mode)
{
        wlc_hw->hw_stf_ss_opmode = stf_mode;

        if (wlc_hw->clk)
                brcms_upd_ofdm_pctl1_table(wlc_hw);
}

static bool brcms_b_validate_chip_access(struct brcms_hardware *wlc_hw)
{
        struct bcma_device *core = wlc_hw->d11core;
        u32 w, val;
        struct wiphy *wiphy = wlc_hw->wlc->wiphy;

        BCMMSG(wiphy, "wl%d\n", wlc_hw->unit);

        /* Validate dchip register access */

        bcma_write32(core, D11REGOFFS(objaddr), OBJADDR_SHM_SEL | 0);
        (void)bcma_read32(core, D11REGOFFS(objaddr));
        w = bcma_read32(core, D11REGOFFS(objdata));

        /* Can we write and read back a 32bit register? */
        bcma_write32(core, D11REGOFFS(objaddr), OBJADDR_SHM_SEL | 0);
        (void)bcma_read32(core, D11REGOFFS(objaddr));
        bcma_write32(core, D11REGOFFS(objdata), (u32) 0xaa5555aa);

        bcma_write32(core, D11REGOFFS(objaddr), OBJADDR_SHM_SEL | 0);
        (void)bcma_read32(core, D11REGOFFS(objaddr));
        val = bcma_read32(core, D11REGOFFS(objdata));
        if (val != (u32) 0xaa5555aa) {
                wiphy_err(wiphy, "wl%d: validate_chip_access: SHM = 0x%x, "
                          "expected 0xaa5555aa\n", wlc_hw->unit, val);
                return false;
        }

        bcma_write32(core, D11REGOFFS(objaddr), OBJADDR_SHM_SEL | 0);
        (void)bcma_read32(core, D11REGOFFS(objaddr));
        bcma_write32(core, D11REGOFFS(objdata), (u32) 0x55aaaa55);

        bcma_write32(core, D11REGOFFS(objaddr), OBJADDR_SHM_SEL | 0);
        (void)bcma_read32(core, D11REGOFFS(objaddr));
        val = bcma_read32(core, D11REGOFFS(objdata));
        if (val != (u32) 0x55aaaa55) {
                wiphy_err(wiphy, "wl%d: validate_chip_access: SHM = 0x%x, "
                          "expected 0x55aaaa55\n", wlc_hw->unit, val);
                return false;
        }

        bcma_write32(core, D11REGOFFS(objaddr), OBJADDR_SHM_SEL | 0);
        (void)bcma_read32(core, D11REGOFFS(objaddr));
        bcma_write32(core, D11REGOFFS(objdata), w);

        /* clear CFPStart */
        bcma_write32(core, D11REGOFFS(tsf_cfpstart), 0);

        w = bcma_read32(core, D11REGOFFS(maccontrol));
        if ((w != (MCTL_IHR_EN | MCTL_WAKE)) &&
            (w != (MCTL_IHR_EN | MCTL_GMODE | MCTL_WAKE))) {
                wiphy_err(wiphy, "wl%d: validate_chip_access: maccontrol = "
                          "0x%x, expected 0x%x or 0x%x\n", wlc_hw->unit, w,
                          (MCTL_IHR_EN | MCTL_WAKE),
                          (MCTL_IHR_EN | MCTL_GMODE | MCTL_WAKE));
                return false;
        }

        return true;
}

#define PHYPLL_WAIT_US  100000

void brcms_b_core_phypll_ctl(struct brcms_hardware *wlc_hw, bool on)
{
        struct bcma_device *core = wlc_hw->d11core;
        u32 tmp;

        BCMMSG(wlc_hw->wlc->wiphy, "wl%d\n", wlc_hw->unit);

        tmp = 0;

        if (on) {
                if ((ai_get_chip_id(wlc_hw->sih) == BCMA_CHIP_ID_BCM4313)) {
                        bcma_set32(core, D11REGOFFS(clk_ctl_st),
                                   CCS_ERSRC_REQ_HT |
                                   CCS_ERSRC_REQ_D11PLL |
                                   CCS_ERSRC_REQ_PHYPLL);
                        SPINWAIT((bcma_read32(core, D11REGOFFS(clk_ctl_st)) &
                                  CCS_ERSRC_AVAIL_HT) != CCS_ERSRC_AVAIL_HT,
                                 PHYPLL_WAIT_US);

                        tmp = bcma_read32(core, D11REGOFFS(clk_ctl_st));
                        if ((tmp & CCS_ERSRC_AVAIL_HT) != CCS_ERSRC_AVAIL_HT)
                                wiphy_err(wlc_hw->wlc->wiphy, "%s: turn on PHY"
                                          " PLL failed\n", __func__);
                } else {
                        bcma_set32(core, D11REGOFFS(clk_ctl_st),
                                   tmp | CCS_ERSRC_REQ_D11PLL |
                                   CCS_ERSRC_REQ_PHYPLL);
                        SPINWAIT((bcma_read32(core, D11REGOFFS(clk_ctl_st)) &
                                  (CCS_ERSRC_AVAIL_D11PLL |
                                   CCS_ERSRC_AVAIL_PHYPLL)) !=
                                 (CCS_ERSRC_AVAIL_D11PLL |
                                  CCS_ERSRC_AVAIL_PHYPLL), PHYPLL_WAIT_US);

                        tmp = bcma_read32(core, D11REGOFFS(clk_ctl_st));
                        if ((tmp &
                             (CCS_ERSRC_AVAIL_D11PLL | CCS_ERSRC_AVAIL_PHYPLL))
                            !=
                            (CCS_ERSRC_AVAIL_D11PLL | CCS_ERSRC_AVAIL_PHYPLL))
                                wiphy_err(wlc_hw->wlc->wiphy, "%s: turn on "
                                          "PHY PLL failed\n", __func__);
                }
        } else {
                /*
                 * Since the PLL may be shared, other cores can still
                 * be requesting it; so we'll deassert the request but
                 * not wait for status to comply.
                 */
                bcma_mask32(core, D11REGOFFS(clk_ctl_st),
                            ~CCS_ERSRC_REQ_PHYPLL);
                (void)bcma_read32(core, D11REGOFFS(clk_ctl_st));
        }
}

static void brcms_c_coredisable(struct brcms_hardware *wlc_hw)
{
        bool dev_gone;

        BCMMSG(wlc_hw->wlc->wiphy, "wl%d\n", wlc_hw->unit);

        dev_gone = brcms_deviceremoved(wlc_hw->wlc);

        if (dev_gone)
                return;

        if (wlc_hw->noreset)
                return;

        /* radio off */
        wlc_phy_switch_radio(wlc_hw->band->pi, OFF);

        /* turn off analog core */
        wlc_phy_anacore(wlc_hw->band->pi, OFF);

        /* turn off PHYPLL to save power */
        brcms_b_core_phypll_ctl(wlc_hw, false);

        wlc_hw->clk = false;
        bcma_core_disable(wlc_hw->d11core, 0);
        wlc_phy_hw_clk_state_upd(wlc_hw->band->pi, false);
}

static void brcms_c_flushqueues(struct brcms_c_info *wlc)
{
        struct brcms_hardware *wlc_hw = wlc->hw;
        uint i;

        /* free any posted tx packets */
        for (i = 0; i < NFIFO; i++)
                if (wlc_hw->di[i]) {
                        dma_txreclaim(wlc_hw->di[i], DMA_RANGE_ALL);
                        wlc->core->txpktpend[i] = 0;
                        BCMMSG(wlc->wiphy, "pktpend fifo %d clrd\n", i);
                }

        /* free any posted rx packets */
        dma_rxreclaim(wlc_hw->di[RX_FIFO]);
}

static u16
brcms_b_read_objmem(struct brcms_hardware *wlc_hw, uint offset, u32 sel)
{
        struct bcma_device *core = wlc_hw->d11core;
        u16 objoff = D11REGOFFS(objdata);

        bcma_write32(core, D11REGOFFS(objaddr), sel | (offset >> 2));
        (void)bcma_read32(core, D11REGOFFS(objaddr));
        if (offset & 2)
                objoff += 2;

        return bcma_read16(core, objoff);
}

static void
brcms_b_write_objmem(struct brcms_hardware *wlc_hw, uint offset, u16 v,
                     u32 sel)
{
        struct bcma_device *core = wlc_hw->d11core;
        u16 objoff = D11REGOFFS(objdata);

        bcma_write32(core, D11REGOFFS(objaddr), sel | (offset >> 2));
        (void)bcma_read32(core, D11REGOFFS(objaddr));
        if (offset & 2)
                objoff += 2;

        bcma_write16(core, objoff, v);
}

/*
 * Read a single u16 from shared memory.
 * SHM 'offset' needs to be an even address
 */
u16 brcms_b_read_shm(struct brcms_hardware *wlc_hw, uint offset)
{
        return brcms_b_read_objmem(wlc_hw, offset, OBJADDR_SHM_SEL);
}

/*
 * Write a single u16 to shared memory.
 * SHM 'offset' needs to be an even address
 */
void brcms_b_write_shm(struct brcms_hardware *wlc_hw, uint offset, u16 v)
{
        brcms_b_write_objmem(wlc_hw, offset, v, OBJADDR_SHM_SEL);
}

/*
 * Copy a buffer to shared memory of specified type .
 * SHM 'offset' needs to be an even address and
 * Buffer length 'len' must be an even number of bytes
 * 'sel' selects the type of memory
 */
void
brcms_b_copyto_objmem(struct brcms_hardware *wlc_hw, uint offset,
                      const void *buf, int len, u32 sel)
{
        u16 v;
        const u8 *p = (const u8 *)buf;
        int i;

        if (len <= 0 || (offset & 1) || (len & 1))
                return;

        for (i = 0; i < len; i += 2) {
                v = p[i] | (p[i + 1] << 8);
                brcms_b_write_objmem(wlc_hw, offset + i, v, sel);
        }
}

/*
 * Copy a piece of shared memory of specified type to a buffer .
 * SHM 'offset' needs to be an even address and
 * Buffer length 'len' must be an even number of bytes
 * 'sel' selects the type of memory
 */
void
brcms_b_copyfrom_objmem(struct brcms_hardware *wlc_hw, uint offset, void *buf,
                         int len, u32 sel)
{
        u16 v;
        u8 *p = (u8 *) buf;
        int i;

        if (len <= 0 || (offset & 1) || (len & 1))
                return;

        for (i = 0; i < len; i += 2) {
                v = brcms_b_read_objmem(wlc_hw, offset + i, sel);
                p[i] = v & 0xFF;
                p[i + 1] = (v >> 8) & 0xFF;
        }
}

/* Copy a buffer to shared memory.
 * SHM 'offset' needs to be an even address and
 * Buffer length 'len' must be an even number of bytes
 */
static void brcms_c_copyto_shm(struct brcms_c_info *wlc, uint offset,
                        const void *buf, int len)
{
        brcms_b_copyto_objmem(wlc->hw, offset, buf, len, OBJADDR_SHM_SEL);
}