/******************************************************************************
 *
 * Copyright(c) 2003 - 2011 Intel Corporation. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of version 2 of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
 *
 * The full GNU General Public License is included in this distribution in the
 * file called LICENSE.
 *
 * Contact Information:
 *  Intel Linux Wireless <ilw@linux.intel.com>
 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
 *
 *****************************************************************************/

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/pci.h>
#include <linux/dma-mapping.h>
#include <linux/delay.h>
#include <linux/sched.h>
#include <linux/skbuff.h>
#include <linux/netdevice.h>
#include <linux/firmware.h>
#include <linux/etherdevice.h>
#include <asm/unaligned.h>
#include <net/mac80211.h>

#include "common.h"
#include "3945.h"

/* Send led command */
static int
il3945_send_led_cmd(struct il_priv *il, struct il_led_cmd *led_cmd)
{
        struct il_host_cmd cmd = {
                .id = C_LEDS,
                .len = sizeof(struct il_led_cmd),
                .data = led_cmd,
                .flags = CMD_ASYNC,
                .callback = NULL,
        };

        return il_send_cmd(il, &cmd);
}

#define IL_DECLARE_RATE_INFO(r, ip, in, rp, rn, pp, np)    \
        [RATE_##r##M_IDX] = { RATE_##r##M_PLCP,   \
                                    RATE_##r##M_IEEE,   \
                                    RATE_##ip##M_IDX, \
                                    RATE_##in##M_IDX, \
                                    RATE_##rp##M_IDX, \
                                    RATE_##rn##M_IDX, \
                                    RATE_##pp##M_IDX, \
                                    RATE_##np##M_IDX, \
                                    RATE_##r##M_IDX_TBL, \
                                    RATE_##ip##M_IDX_TBL }

/*
 * Parameter order:
 *   rate, prev rate, next rate, prev tgg rate, next tgg rate
 *
 * If there isn't a valid next or previous rate then INV is used which
 * maps to RATE_INVALID
 *
 */
const struct il3945_rate_info il3945_rates[RATE_COUNT_3945] = {
        IL_DECLARE_RATE_INFO(1, INV, 2, INV, 2, INV, 2),        /*  1mbps */
        IL_DECLARE_RATE_INFO(2, 1, 5, 1, 5, 1, 5),      /*  2mbps */
        IL_DECLARE_RATE_INFO(5, 2, 6, 2, 11, 2, 11),    /*5.5mbps */
        IL_DECLARE_RATE_INFO(11, 9, 12, 5, 12, 5, 18),  /* 11mbps */
        IL_DECLARE_RATE_INFO(6, 5, 9, 5, 11, 5, 11),    /*  6mbps */
        IL_DECLARE_RATE_INFO(9, 6, 11, 5, 11, 5, 11),   /*  9mbps */
        IL_DECLARE_RATE_INFO(12, 11, 18, 11, 18, 11, 18),       /* 12mbps */
        IL_DECLARE_RATE_INFO(18, 12, 24, 12, 24, 11, 24),       /* 18mbps */
        IL_DECLARE_RATE_INFO(24, 18, 36, 18, 36, 18, 36),       /* 24mbps */
        IL_DECLARE_RATE_INFO(36, 24, 48, 24, 48, 24, 48),       /* 36mbps */
        IL_DECLARE_RATE_INFO(48, 36, 54, 36, 54, 36, 54),       /* 48mbps */
        IL_DECLARE_RATE_INFO(54, 48, INV, 48, INV, 48, INV),    /* 54mbps */
};

static inline u8
il3945_get_prev_ieee_rate(u8 rate_idx)
{
        u8 rate = il3945_rates[rate_idx].prev_ieee;

        if (rate == RATE_INVALID)
                rate = rate_idx;
        return rate;
}

/* 1 = enable the il3945_disable_events() function */
#define IL_EVT_DISABLE (0)
#define IL_EVT_DISABLE_SIZE (1532/32)

/**
 * il3945_disable_events - Disable selected events in uCode event log
 *
 * Disable an event by writing "1"s into "disable"
 *   bitmap in SRAM.  Bit position corresponds to Event # (id/type).
 *   Default values of 0 enable uCode events to be logged.
 * Use for only special debugging.  This function is just a placeholder as-is,
 *   you'll need to provide the special bits! ...
 *   ... and set IL_EVT_DISABLE to 1. */
void
il3945_disable_events(struct il_priv *il)
{
        int i;
        u32 base;               /* SRAM address of event log header */
        u32 disable_ptr;        /* SRAM address of event-disable bitmap array */
        u32 array_size;         /* # of u32 entries in array */
        static const u32 evt_disable[IL_EVT_DISABLE_SIZE] = {
                0x00000000,     /*   31 -    0  Event id numbers */
                0x00000000,     /*   63 -   32 */
                0x00000000,     /*   95 -   64 */
                0x00000000,     /*  127 -   96 */
                0x00000000,     /*  159 -  128 */
                0x00000000,     /*  191 -  160 */
                0x00000000,     /*  223 -  192 */
                0x00000000,     /*  255 -  224 */
                0x00000000,     /*  287 -  256 */
                0x00000000,     /*  319 -  288 */
                0x00000000,     /*  351 -  320 */
                0x00000000,     /*  383 -  352 */
                0x00000000,     /*  415 -  384 */
                0x00000000,     /*  447 -  416 */
                0x00000000,     /*  479 -  448 */
                0x00000000,     /*  511 -  480 */
                0x00000000,     /*  543 -  512 */
                0x00000000,     /*  575 -  544 */
                0x00000000,     /*  607 -  576 */
                0x00000000,     /*  639 -  608 */
                0x00000000,     /*  671 -  640 */
                0x00000000,     /*  703 -  672 */
                0x00000000,     /*  735 -  704 */
                0x00000000,     /*  767 -  736 */
                0x00000000,     /*  799 -  768 */
                0x00000000,     /*  831 -  800 */
                0x00000000,     /*  863 -  832 */
                0x00000000,     /*  895 -  864 */
                0x00000000,     /*  927 -  896 */
                0x00000000,     /*  959 -  928 */
                0x00000000,     /*  991 -  960 */
                0x00000000,     /* 1023 -  992 */
                0x00000000,     /* 1055 - 1024 */
                0x00000000,     /* 1087 - 1056 */
                0x00000000,     /* 1119 - 1088 */
                0x00000000,     /* 1151 - 1120 */
                0x00000000,     /* 1183 - 1152 */
                0x00000000,     /* 1215 - 1184 */
                0x00000000,     /* 1247 - 1216 */
                0x00000000,     /* 1279 - 1248 */
                0x00000000,     /* 1311 - 1280 */
                0x00000000,     /* 1343 - 1312 */
                0x00000000,     /* 1375 - 1344 */
                0x00000000,     /* 1407 - 1376 */
                0x00000000,     /* 1439 - 1408 */
                0x00000000,     /* 1471 - 1440 */
                0x00000000,     /* 1503 - 1472 */
        };

        base = le32_to_cpu(il->card_alive.log_event_table_ptr);
        if (!il3945_hw_valid_rtc_data_addr(base)) {
                IL_ERR("Invalid event log pointer 0x%08X\n", base);
                return;
        }

        disable_ptr = il_read_targ_mem(il, base + (4 * sizeof(u32)));
        array_size = il_read_targ_mem(il, base + (5 * sizeof(u32)));

        if (IL_EVT_DISABLE && array_size == IL_EVT_DISABLE_SIZE) {
                D_INFO("Disabling selected uCode log events at 0x%x\n",
                       disable_ptr);
                for (i = 0; i < IL_EVT_DISABLE_SIZE; i++)
                        il_write_targ_mem(il, disable_ptr + (i * sizeof(u32)),
                                          evt_disable[i]);

        } else {
                D_INFO("Selected uCode log events may be disabled\n");
                D_INFO("  by writing \"1\"s into disable bitmap\n");
                D_INFO("  in SRAM at 0x%x, size %d u32s\n", disable_ptr,
                       array_size);
        }

}

static int
il3945_hwrate_to_plcp_idx(u8 plcp)
{
        int idx;

        for (idx = 0; idx < RATE_COUNT_3945; idx++)
                if (il3945_rates[idx].plcp == plcp)
                        return idx;
        return -1;
}

#ifdef CONFIG_IWLEGACY_DEBUG
#define TX_STATUS_ENTRY(x) case TX_3945_STATUS_FAIL_ ## x: return #x

static const char *
il3945_get_tx_fail_reason(u32 status)
{
        switch (status & TX_STATUS_MSK) {
        case TX_3945_STATUS_SUCCESS:
                return "SUCCESS";
                TX_STATUS_ENTRY(SHORT_LIMIT);
                TX_STATUS_ENTRY(LONG_LIMIT);
                TX_STATUS_ENTRY(FIFO_UNDERRUN);
                TX_STATUS_ENTRY(MGMNT_ABORT);
                TX_STATUS_ENTRY(NEXT_FRAG);
                TX_STATUS_ENTRY(LIFE_EXPIRE);
                TX_STATUS_ENTRY(DEST_PS);
                TX_STATUS_ENTRY(ABORTED);
                TX_STATUS_ENTRY(BT_RETRY);
                TX_STATUS_ENTRY(STA_INVALID);
                TX_STATUS_ENTRY(FRAG_DROPPED);
                TX_STATUS_ENTRY(TID_DISABLE);
                TX_STATUS_ENTRY(FRAME_FLUSHED);
                TX_STATUS_ENTRY(INSUFFICIENT_CF_POLL);
                TX_STATUS_ENTRY(TX_LOCKED);
                TX_STATUS_ENTRY(NO_BEACON_ON_RADAR);
        }

        return "UNKNOWN";
}
#else
static inline const char *
il3945_get_tx_fail_reason(u32 status)
{
        return "";
}
#endif

/*
 * get ieee prev rate from rate scale table.
 * for A and B mode we need to overright prev
 * value
 */
int
il3945_rs_next_rate(struct il_priv *il, int rate)
{
        int next_rate = il3945_get_prev_ieee_rate(rate);

        switch (il->band) {
        case IEEE80211_BAND_5GHZ:
                if (rate == RATE_12M_IDX)
                        next_rate = RATE_9M_IDX;
                else if (rate == RATE_6M_IDX)
                        next_rate = RATE_6M_IDX;
                break;
        case IEEE80211_BAND_2GHZ:
                if (!(il->_3945.sta_supp_rates & IL_OFDM_RATES_MASK) &&
                    il_is_associated(il)) {
                        if (rate == RATE_11M_IDX)
                                next_rate = RATE_5M_IDX;
                }
                break;

        default:
                break;
        }

        return next_rate;
}

/**
 * il3945_tx_queue_reclaim - Reclaim Tx queue entries already Tx'd
 *
 * When FW advances 'R' idx, all entries between old and new 'R' idx
 * need to be reclaimed. As result, some free space forms. If there is
 * enough free space (> low mark), wake the stack that feeds us.
 */
static void
il3945_tx_queue_reclaim(struct il_priv *il, int txq_id, int idx)
{
        struct il_tx_queue *txq = &il->txq[txq_id];
        struct il_queue *q = &txq->q;
        struct sk_buff *skb;

        BUG_ON(txq_id == IL39_CMD_QUEUE_NUM);

        for (idx = il_queue_inc_wrap(idx, q->n_bd); q->read_ptr != idx;
             q->read_ptr = il_queue_inc_wrap(q->read_ptr, q->n_bd)) {

                skb = txq->skbs[txq->q.read_ptr];
                ieee80211_tx_status_irqsafe(il->hw, skb);
                txq->skbs[txq->q.read_ptr] = NULL;
                il->ops->txq_free_tfd(il, txq);
        }

        if (il_queue_space(q) > q->low_mark && txq_id >= 0 &&
            txq_id != IL39_CMD_QUEUE_NUM && il->mac80211_registered)
                il_wake_queue(il, txq);
}

/**
 * il3945_hdl_tx - Handle Tx response
 */
static void
il3945_hdl_tx(struct il_priv *il, struct il_rx_buf *rxb)
{
        struct il_rx_pkt *pkt = rxb_addr(rxb);
        u16 sequence = le16_to_cpu(pkt->hdr.sequence);
        int txq_id = SEQ_TO_QUEUE(sequence);
        int idx = SEQ_TO_IDX(sequence);
        struct il_tx_queue *txq = &il->txq[txq_id];
        struct ieee80211_tx_info *info;
        struct il3945_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
        u32 status = le32_to_cpu(tx_resp->status);
        int rate_idx;
        int fail;

        if (idx >= txq->q.n_bd || il_queue_used(&txq->q, idx) == 0) {
                IL_ERR("Read idx for DMA queue txq_id (%d) idx %d "
                       "is out of range [0-%d] %d %d\n", txq_id, idx,
                       txq->q.n_bd, txq->q.write_ptr, txq->q.read_ptr);
                return;
        }

        /*
         * Firmware will not transmit frame on passive channel, if it not yet
         * received some valid frame on that channel. When this error happen
         * we have to wait until firmware will unblock itself i.e. when we
         * note received beacon or other frame. We unblock queues in
         * il3945_pass_packet_to_mac80211 or in il_mac_bss_info_changed.
         */
        if (unlikely((status & TX_STATUS_MSK) == TX_STATUS_FAIL_PASSIVE_NO_RX) &&
            il->iw_mode == NL80211_IFTYPE_STATION) {
                il_stop_queues_by_reason(il, IL_STOP_REASON_PASSIVE);
                D_INFO("Stopped queues - RX waiting on passive channel\n");
        }

        txq->time_stamp = jiffies;
        info = IEEE80211_SKB_CB(txq->skbs[txq->q.read_ptr]);
        ieee80211_tx_info_clear_status(info);

        /* Fill the MRR chain with some info about on-chip retransmissions */
        rate_idx = il3945_hwrate_to_plcp_idx(tx_resp->rate);
        if (info->band == IEEE80211_BAND_5GHZ)
                rate_idx -= IL_FIRST_OFDM_RATE;

        fail = tx_resp->failure_frame;

        info->status.rates[0].idx = rate_idx;
        info->status.rates[0].count = fail + 1; /* add final attempt */

        /* tx_status->rts_retry_count = tx_resp->failure_rts; */
        info->flags |=
            ((status & TX_STATUS_MSK) ==
             TX_STATUS_SUCCESS) ? IEEE80211_TX_STAT_ACK : 0;

        D_TX("Tx queue %d Status %s (0x%08x) plcp rate %d retries %d\n", txq_id,
             il3945_get_tx_fail_reason(status), status, tx_resp->rate,
             tx_resp->failure_frame);

        D_TX_REPLY("Tx queue reclaim %d\n", idx);
        il3945_tx_queue_reclaim(il, txq_id, idx);

        if (status & TX_ABORT_REQUIRED_MSK)
                IL_ERR("TODO:  Implement Tx ABORT REQUIRED!!!\n");
}

/*****************************************************************************
 *
 * Intel PRO/Wireless 3945ABG/BG Network Connection
 *
 *  RX handler implementations
 *
 *****************************************************************************/
#ifdef CONFIG_IWLEGACY_DEBUGFS
static void
il3945_accumulative_stats(struct il_priv *il, __le32 * stats)
{
        int i;
        __le32 *prev_stats;
        u32 *accum_stats;
        u32 *delta, *max_delta;

        prev_stats = (__le32 *) &il->_3945.stats;
        accum_stats = (u32 *) &il->_3945.accum_stats;
        delta = (u32 *) &il->_3945.delta_stats;
        max_delta = (u32 *) &il->_3945.max_delta;

        for (i = sizeof(__le32); i < sizeof(struct il3945_notif_stats);
             i +=
             sizeof(__le32), stats++, prev_stats++, delta++, max_delta++,
             accum_stats++) {
                if (le32_to_cpu(*stats) > le32_to_cpu(*prev_stats)) {
                        *delta =
                            (le32_to_cpu(*stats) - le32_to_cpu(*prev_stats));
                        *accum_stats += *delta;
                        if (*delta > *max_delta)
                                *max_delta = *delta;
                }
        }

        /* reset accumulative stats for "no-counter" type stats */
        il->_3945.accum_stats.general.temperature =
            il->_3945.stats.general.temperature;
        il->_3945.accum_stats.general.ttl_timestamp =
            il->_3945.stats.general.ttl_timestamp;
}
#endif

void
il3945_hdl_stats(struct il_priv *il, struct il_rx_buf *rxb)
{
        struct il_rx_pkt *pkt = rxb_addr(rxb);

        D_RX("Statistics notification received (%d vs %d).\n",
             (int)sizeof(struct il3945_notif_stats),
             le32_to_cpu(pkt->len_n_flags) & IL_RX_FRAME_SIZE_MSK);
#ifdef CONFIG_IWLEGACY_DEBUGFS
        il3945_accumulative_stats(il, (__le32 *) &pkt->u.raw);
#endif

        memcpy(&il->_3945.stats, pkt->u.raw, sizeof(il->_3945.stats));
}

void
il3945_hdl_c_stats(struct il_priv *il, struct il_rx_buf *rxb)
{
        struct il_rx_pkt *pkt = rxb_addr(rxb);
        __le32 *flag = (__le32 *) &pkt->u.raw;

        if (le32_to_cpu(*flag) & UCODE_STATS_CLEAR_MSK) {
#ifdef CONFIG_IWLEGACY_DEBUGFS
                memset(&il->_3945.accum_stats, 0,
                       sizeof(struct il3945_notif_stats));
                memset(&il->_3945.delta_stats, 0,
                       sizeof(struct il3945_notif_stats));
                memset(&il->_3945.max_delta, 0,
                       sizeof(struct il3945_notif_stats));
#endif
                D_RX("Statistics have been cleared\n");
        }
        il3945_hdl_stats(il, rxb);
}

/******************************************************************************
 *
 * Misc. internal state and helper functions
 *
 ******************************************************************************/

/* This is necessary only for a number of stats, see the caller. */
static int
il3945_is_network_packet(struct il_priv *il, struct ieee80211_hdr *header)
{
        /* Filter incoming packets to determine if they are targeted toward
         * this network, discarding packets coming from ourselves */
        switch (il->iw_mode) {
        case NL80211_IFTYPE_ADHOC:      /* Header: Dest. | Source    | BSSID */
                /* packets to our IBSS update information */
                return ether_addr_equal_64bits(header->addr3, il->bssid);
        case NL80211_IFTYPE_STATION:    /* Header: Dest. | AP{BSSID} | Source */
                /* packets to our IBSS update information */
                return ether_addr_equal_64bits(header->addr2, il->bssid);
        default:
                return 1;
        }
}

#define SMALL_PACKET_SIZE 256

static void
il3945_pass_packet_to_mac80211(struct il_priv *il, struct il_rx_buf *rxb,
                               struct ieee80211_rx_status *stats)
{
        struct il_rx_pkt *pkt = rxb_addr(rxb);
        struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)IL_RX_DATA(pkt);
        struct il3945_rx_frame_hdr *rx_hdr = IL_RX_HDR(pkt);
        struct il3945_rx_frame_end *rx_end = IL_RX_END(pkt);
        u32 len = le16_to_cpu(rx_hdr->len);
        struct sk_buff *skb;
        __le16 fc = hdr->frame_control;
        u32 fraglen = PAGE_SIZE << il->hw_params.rx_page_order;

        /* We received data from the HW, so stop the watchdog */
        if (unlikely(len + IL39_RX_FRAME_SIZE > fraglen)) {
                D_DROP("Corruption detected!\n");
                return;
        }

        /* We only process data packets if the interface is open */
        if (unlikely(!il->is_open)) {
                D_DROP("Dropping packet while interface is not open.\n");
                return;
        }

        if (unlikely(test_bit(IL_STOP_REASON_PASSIVE, &il->stop_reason))) {
                il_wake_queues_by_reason(il, IL_STOP_REASON_PASSIVE);
                D_INFO("Woke queues - frame received on passive channel\n");
        }

        skb = dev_alloc_skb(SMALL_PACKET_SIZE);
        if (!skb) {
                IL_ERR("dev_alloc_skb failed\n");
                return;
        }

        if (!il3945_mod_params.sw_crypto)
                il_set_decrypted_flag(il, (struct ieee80211_hdr *)pkt,
                                      le32_to_cpu(rx_end->status), stats);

        /* If frame is small enough to fit into skb->head, copy it
         * and do not consume a full page
         */
        if (len <= SMALL_PACKET_SIZE) {
                memcpy(skb_put(skb, len), rx_hdr->payload, len);
        } else {
                skb_add_rx_frag(skb, 0, rxb->page,
                                (void *)rx_hdr->payload - (void *)pkt, len,
                                fraglen);
                il->alloc_rxb_page--;
                rxb->page = NULL;
        }
        il_update_stats(il, false, fc, len);
        memcpy(IEEE80211_SKB_RXCB(skb), stats, sizeof(*stats));

        ieee80211_rx(il->hw, skb);
}

#define IL_DELAY_NEXT_SCAN_AFTER_ASSOC (HZ*6)

static void
il3945_hdl_rx(struct il_priv *il, struct il_rx_buf *rxb)
{
        struct ieee80211_hdr *header;
        struct ieee80211_rx_status rx_status = {};
        struct il_rx_pkt *pkt = rxb_addr(rxb);
        struct il3945_rx_frame_stats *rx_stats = IL_RX_STATS(pkt);
        struct il3945_rx_frame_hdr *rx_hdr = IL_RX_HDR(pkt);
        struct il3945_rx_frame_end *rx_end = IL_RX_END(pkt);
        u16 rx_stats_sig_avg __maybe_unused = le16_to_cpu(rx_stats->sig_avg);
        u16 rx_stats_noise_diff __maybe_unused =
            le16_to_cpu(rx_stats->noise_diff);
        u8 network_packet;

        rx_status.flag = 0;
        rx_status.mactime = le64_to_cpu(rx_end->timestamp);
        rx_status.band =
            (rx_hdr->
             phy_flags & RX_RES_PHY_FLAGS_BAND_24_MSK) ? IEEE80211_BAND_2GHZ :
            IEEE80211_BAND_5GHZ;
        rx_status.freq =
            ieee80211_channel_to_frequency(le16_to_cpu(rx_hdr->channel),
                                           rx_status.band);

        rx_status.rate_idx = il3945_hwrate_to_plcp_idx(rx_hdr->rate);
        if (rx_status.band == IEEE80211_BAND_5GHZ)
                rx_status.rate_idx -= IL_FIRST_OFDM_RATE;

        rx_status.antenna =
            (le16_to_cpu(rx_hdr->phy_flags) & RX_RES_PHY_FLAGS_ANTENNA_MSK) >>
            4;

        /* set the preamble flag if appropriate */
        if (rx_hdr->phy_flags & RX_RES_PHY_FLAGS_SHORT_PREAMBLE_MSK)
                rx_status.flag |= RX_FLAG_SHORTPRE;

        if ((unlikely(rx_stats->phy_count > 20))) {
                D_DROP("dsp size out of range [0,20]: %d/n",
                       rx_stats->phy_count);
                return;
        }

        if (!(rx_end->status & RX_RES_STATUS_NO_CRC32_ERROR) ||
            !(rx_end->status & RX_RES_STATUS_NO_RXE_OVERFLOW)) {
                D_RX("Bad CRC or FIFO: 0x%08X.\n", rx_end->status);
                return;
        }

        /* Convert 3945's rssi indicator to dBm */
        rx_status.signal = rx_stats->rssi - IL39_RSSI_OFFSET;

        D_STATS("Rssi %d sig_avg %d noise_diff %d\n", rx_status.signal,
                rx_stats_sig_avg, rx_stats_noise_diff);

        header = (struct ieee80211_hdr *)IL_RX_DATA(pkt);

        network_packet = il3945_is_network_packet(il, header);

        D_STATS("[%c] %d RSSI:%d Signal:%u, Rate:%u\n",
                network_packet ? '*' : ' ', le16_to_cpu(rx_hdr->channel),
                rx_status.signal, rx_status.signal, rx_status.rate_idx);

        if (network_packet) {
                il->_3945.last_beacon_time =
                    le32_to_cpu(rx_end->beacon_timestamp);
                il->_3945.last_tsf = le64_to_cpu(rx_end->timestamp);
                il->_3945.last_rx_rssi = rx_status.signal;
        }

        il3945_pass_packet_to_mac80211(il, rxb, &rx_status);
}

int
il3945_hw_txq_attach_buf_to_tfd(struct il_priv *il, struct il_tx_queue *txq,
                                dma_addr_t addr, u16 len, u8 reset, u8 pad)
{
        int count;
        struct il_queue *q;
        struct il3945_tfd *tfd, *tfd_tmp;

        q = &txq->q;
        tfd_tmp = (struct il3945_tfd *)txq->tfds;
        tfd = &tfd_tmp[q->write_ptr];

        if (reset)
                memset(tfd, 0, sizeof(*tfd));

        count = TFD_CTL_COUNT_GET(le32_to_cpu(tfd->control_flags));

        if (count >= NUM_TFD_CHUNKS || count < 0) {
                IL_ERR("Error can not send more than %d chunks\n",
                       NUM_TFD_CHUNKS);
                return -EINVAL;
        }

        tfd->tbs[count].addr = cpu_to_le32(addr);
        tfd->tbs[count].len = cpu_to_le32(len);

        count++;

        tfd->control_flags =
            cpu_to_le32(TFD_CTL_COUNT_SET(count) | TFD_CTL_PAD_SET(pad));

        return 0;
}

/**
 * il3945_hw_txq_free_tfd - Free one TFD, those at idx [txq->q.read_ptr]
 *
 * Does NOT advance any idxes
 */
void
il3945_hw_txq_free_tfd(struct il_priv *il, struct il_tx_queue *txq)
{
        struct il3945_tfd *tfd_tmp = (struct il3945_tfd *)txq->tfds;
        int idx = txq->q.read_ptr;
        struct il3945_tfd *tfd = &tfd_tmp[idx];
        struct pci_dev *dev = il->pci_dev;
        int i;
        int counter;

        /* sanity check */
        counter = TFD_CTL_COUNT_GET(le32_to_cpu(tfd->control_flags));
        if (counter > NUM_TFD_CHUNKS) {
                IL_ERR("Too many chunks: %i\n", counter);
                /* @todo issue fatal error, it is quite serious situation */
                return;
        }

        /* Unmap tx_cmd */
        if (counter)
                pci_unmap_single(dev, dma_unmap_addr(&txq->meta[idx], mapping),
                                 dma_unmap_len(&txq->meta[idx], len),
                                 PCI_DMA_TODEVICE);

        /* unmap chunks if any */

        for (i = 1; i < counter; i++)
                pci_unmap_single(dev, le32_to_cpu(tfd->tbs[i].addr),
                                 le32_to_cpu(tfd->tbs[i].len),
                                 PCI_DMA_TODEVICE);

        /* free SKB */
        if (txq->skbs) {
                struct sk_buff *skb = txq->skbs[txq->q.read_ptr];

                /* can be called from irqs-disabled context */
                if (skb) {
                        dev_kfree_skb_any(skb);
                        txq->skbs[txq->q.read_ptr] = NULL;
                }
        }
}

/**
 * il3945_hw_build_tx_cmd_rate - Add rate portion to TX_CMD:
 *
*/
void
il3945_hw_build_tx_cmd_rate(struct il_priv *il, struct il_device_cmd *cmd,
                            struct ieee80211_tx_info *info,
                            struct ieee80211_hdr *hdr, int sta_id)
{
        u16 hw_value = ieee80211_get_tx_rate(il->hw, info)->hw_value;
        u16 rate_idx = min(hw_value & 0xffff, RATE_COUNT_3945 - 1);
        u16 rate_mask;
        int rate;
        const u8 rts_retry_limit = 7;
        u8 data_retry_limit;
        __le32 tx_flags;
        __le16 fc = hdr->frame_control;
        struct il3945_tx_cmd *tx_cmd = (struct il3945_tx_cmd *)cmd->cmd.payload;

        rate = il3945_rates[rate_idx].plcp;
        tx_flags = tx_cmd->tx_flags;

        /* We need to figure out how to get the sta->supp_rates while
         * in this running context */
        rate_mask = RATES_MASK_3945;

        /* Set retry limit on DATA packets and Probe Responses */
        if (ieee80211_is_probe_resp(fc))
                data_retry_limit = 3;
        else
                data_retry_limit = IL_DEFAULT_TX_RETRY;
        tx_cmd->data_retry_limit = data_retry_limit;
        /* Set retry limit on RTS packets */
        tx_cmd->rts_retry_limit = min(data_retry_limit, rts_retry_limit);

        tx_cmd->rate = rate;
        tx_cmd->tx_flags = tx_flags;

        /* OFDM */
        tx_cmd->supp_rates[0] =
            ((rate_mask & IL_OFDM_RATES_MASK) >> IL_FIRST_OFDM_RATE) & 0xFF;

        /* CCK */
        tx_cmd->supp_rates[1] = (rate_mask & 0xF);

        D_RATE("Tx sta id: %d, rate: %d (plcp), flags: 0x%4X "
               "cck/ofdm mask: 0x%x/0x%x\n", sta_id, tx_cmd->rate,
               le32_to_cpu(tx_cmd->tx_flags), tx_cmd->supp_rates[1],
               tx_cmd->supp_rates[0]);
}

static u8
il3945_sync_sta(struct il_priv *il, int sta_id, u16 tx_rate)
{
        unsigned long flags_spin;
        struct il_station_entry *station;

        if (sta_id == IL_INVALID_STATION)
                return IL_INVALID_STATION;

        spin_lock_irqsave(&il->sta_lock, flags_spin);
        station = &il->stations[sta_id];

        station->sta.sta.modify_mask = STA_MODIFY_TX_RATE_MSK;
        station->sta.rate_n_flags = cpu_to_le16(tx_rate);
        station->sta.mode = STA_CONTROL_MODIFY_MSK;
        il_send_add_sta(il, &station->sta, CMD_ASYNC);
        spin_unlock_irqrestore(&il->sta_lock, flags_spin);

        D_RATE("SCALE sync station %d to rate %d\n", sta_id, tx_rate);
        return sta_id;
}

static void
il3945_set_pwr_vmain(struct il_priv *il)
{
/*
 * (for documentation purposes)
 * to set power to V_AUX, do

                if (pci_pme_capable(il->pci_dev, PCI_D3cold)) {
                        il_set_bits_mask_prph(il, APMG_PS_CTRL_REG,
                                        APMG_PS_CTRL_VAL_PWR_SRC_VAUX,
                                        ~APMG_PS_CTRL_MSK_PWR_SRC);

                        _il_poll_bit(il, CSR_GPIO_IN,
                                     CSR_GPIO_IN_VAL_VAUX_PWR_SRC,
                                     CSR_GPIO_IN_BIT_AUX_POWER, 5000);
                }
 */

        il_set_bits_mask_prph(il, APMG_PS_CTRL_REG,
                              APMG_PS_CTRL_VAL_PWR_SRC_VMAIN,
                              ~APMG_PS_CTRL_MSK_PWR_SRC);

        _il_poll_bit(il, CSR_GPIO_IN, CSR_GPIO_IN_VAL_VMAIN_PWR_SRC,
                     CSR_GPIO_IN_BIT_AUX_POWER, 5000);
}

static int
il3945_rx_init(struct il_priv *il, struct il_rx_queue *rxq)
{
        il_wr(il, FH39_RCSR_RBD_BASE(0), rxq->bd_dma);
        il_wr(il, FH39_RCSR_RPTR_ADDR(0), rxq->rb_stts_dma);
        il_wr(il, FH39_RCSR_WPTR(0), 0);
        il_wr(il, FH39_RCSR_CONFIG(0),
              FH39_RCSR_RX_CONFIG_REG_VAL_DMA_CHNL_EN_ENABLE |
              FH39_RCSR_RX_CONFIG_REG_VAL_RDRBD_EN_ENABLE |
              FH39_RCSR_RX_CONFIG_REG_BIT_WR_STTS_EN |
              FH39_RCSR_RX_CONFIG_REG_VAL_MAX_FRAG_SIZE_128 | (RX_QUEUE_SIZE_LOG
                                                               <<
                                                               FH39_RCSR_RX_CONFIG_REG_POS_RBDC_SIZE)
              | FH39_RCSR_RX_CONFIG_REG_VAL_IRQ_DEST_INT_HOST | (1 <<
                                                                 FH39_RCSR_RX_CONFIG_REG_POS_IRQ_RBTH)
              | FH39_RCSR_RX_CONFIG_REG_VAL_MSG_MODE_FH);

        /* fake read to flush all prev I/O */
        il_rd(il, FH39_RSSR_CTRL);

        return 0;
}

static int
il3945_tx_reset(struct il_priv *il)
{
        /* bypass mode */
        il_wr_prph(il, ALM_SCD_MODE_REG, 0x2);

        /* RA 0 is active */
        il_wr_prph(il, ALM_SCD_ARASTAT_REG, 0x01);

        /* all 6 fifo are active */
        il_wr_prph(il, ALM_SCD_TXFACT_REG, 0x3f);

        il_wr_prph(il, ALM_SCD_SBYP_MODE_1_REG, 0x010000);
        il_wr_prph(il, ALM_SCD_SBYP_MODE_2_REG, 0x030002);
        il_wr_prph(il, ALM_SCD_TXF4MF_REG, 0x000004);
        il_wr_prph(il, ALM_SCD_TXF5MF_REG, 0x000005);

        il_wr(il, FH39_TSSR_CBB_BASE, il->_3945.shared_phys);

        il_wr(il, FH39_TSSR_MSG_CONFIG,
              FH39_TSSR_TX_MSG_CONFIG_REG_VAL_SNOOP_RD_TXPD_ON |
              FH39_TSSR_TX_MSG_CONFIG_REG_VAL_ORDER_RD_TXPD_ON |
              FH39_TSSR_TX_MSG_CONFIG_REG_VAL_MAX_FRAG_SIZE_128B |
              FH39_TSSR_TX_MSG_CONFIG_REG_VAL_SNOOP_RD_TFD_ON |
              FH39_TSSR_TX_MSG_CONFIG_REG_VAL_ORDER_RD_CBB_ON |
              FH39_TSSR_TX_MSG_CONFIG_REG_VAL_ORDER_RSP_WAIT_TH |
              FH39_TSSR_TX_MSG_CONFIG_REG_VAL_RSP_WAIT_TH);

        return 0;
}

/**
 * il3945_txq_ctx_reset - Reset TX queue context
 *
 * Destroys all DMA structures and initialize them again
 */
static int
il3945_txq_ctx_reset(struct il_priv *il)
{
        int rc, txq_id;

        il3945_hw_txq_ctx_free(il);

        /* allocate tx queue structure */
        rc = il_alloc_txq_mem(il);
        if (rc)
                return rc;

        /* Tx CMD queue */
        rc = il3945_tx_reset(il);
        if (rc)
                goto error;

        /* Tx queue(s) */
        for (txq_id = 0; txq_id < il->hw_params.max_txq_num; txq_id++) {
                rc = il_tx_queue_init(il, txq_id);
                if (rc) {
                        IL_ERR("Tx %d queue init failed\n", txq_id);
                        goto error;
                }
        }

        return rc;

error:
        il3945_hw_txq_ctx_free(il);
        return rc;
}

/*
 * Start up 3945's basic functionality after it has been reset
 * (e.g. after platform boot, or shutdown via il_apm_stop())
 * NOTE:  This does not load uCode nor start the embedded processor
 */
static int
il3945_apm_init(struct il_priv *il)
{
        int ret = il_apm_init(il);

        /* Clear APMG (NIC's internal power management) interrupts */
        il_wr_prph(il, APMG_RTC_INT_MSK_REG, 0x0);
        il_wr_prph(il, APMG_RTC_INT_STT_REG, 0xFFFFFFFF);

        /* Reset radio chip */
        il_set_bits_prph(il, APMG_PS_CTRL_REG, APMG_PS_CTRL_VAL_RESET_REQ);
        udelay(5);
        il_clear_bits_prph(il, APMG_PS_CTRL_REG, APMG_PS_CTRL_VAL_RESET_REQ);

        return ret;
}

static void
il3945_nic_config(struct il_priv *il)
{
        struct il3945_eeprom *eeprom = (struct il3945_eeprom *)il->eeprom;
        unsigned long flags;
        u8 rev_id = il->pci_dev->revision;

        spin_lock_irqsave(&il->lock, flags);

        /* Determine HW type */
        D_INFO("HW Revision ID = 0x%X\n", rev_id);

        if (rev_id & PCI_CFG_REV_ID_BIT_RTP)
                D_INFO("RTP type\n");
        else if (rev_id & PCI_CFG_REV_ID_BIT_BASIC_SKU) {
                D_INFO("3945 RADIO-MB type\n");
                il_set_bit(il, CSR_HW_IF_CONFIG_REG,
                           CSR39_HW_IF_CONFIG_REG_BIT_3945_MB);
        } else {
                D_INFO("3945 RADIO-MM type\n");
                il_set_bit(il, CSR_HW_IF_CONFIG_REG,
                           CSR39_HW_IF_CONFIG_REG_BIT_3945_MM);
        }

        if (EEPROM_SKU_CAP_OP_MODE_MRC == eeprom->sku_cap) {
                D_INFO("SKU OP mode is mrc\n");
                il_set_bit(il, CSR_HW_IF_CONFIG_REG,
                           CSR39_HW_IF_CONFIG_REG_BIT_SKU_MRC);
        } else
                D_INFO("SKU OP mode is basic\n");

        if ((eeprom->board_revision & 0xF0) == 0xD0) {
                D_INFO("3945ABG revision is 0x%X\n", eeprom->board_revision);
                il_set_bit(il, CSR_HW_IF_CONFIG_REG,
                           CSR39_HW_IF_CONFIG_REG_BIT_BOARD_TYPE);
        } else {
                D_INFO("3945ABG revision is 0x%X\n", eeprom->board_revision);
                il_clear_bit(il, CSR_HW_IF_CONFIG_REG,
                             CSR39_HW_IF_CONFIG_REG_BIT_BOARD_TYPE);
        }

        if (eeprom->almgor_m_version <= 1) {
                il_set_bit(il, CSR_HW_IF_CONFIG_REG,
                           CSR39_HW_IF_CONFIG_REG_BITS_SILICON_TYPE_A);
                D_INFO("Card M type A version is 0x%X\n",
                       eeprom->almgor_m_version);
        } else {
                D_INFO("Card M type B version is 0x%X\n",
                       eeprom->almgor_m_version);
                il_set_bit(il, CSR_HW_IF_CONFIG_REG,
                           CSR39_HW_IF_CONFIG_REG_BITS_SILICON_TYPE_B);
        }
        spin_unlock_irqrestore(&il->lock, flags);

        if (eeprom->sku_cap & EEPROM_SKU_CAP_SW_RF_KILL_ENABLE)
                D_RF_KILL("SW RF KILL supported in EEPROM.\n");

        if (eeprom->sku_cap & EEPROM_SKU_CAP_HW_RF_KILL_ENABLE)
                D_RF_KILL("HW RF KILL supported in EEPROM.\n");
}

int
il3945_hw_nic_init(struct il_priv *il)
{
        int rc;
        unsigned long flags;
        struct il_rx_queue *rxq = &il->rxq;

        spin_lock_irqsave(&il->lock, flags);
        il3945_apm_init(il);
        spin_unlock_irqrestore(&il->lock, flags);

        il3945_set_pwr_vmain(il);
        il3945_nic_config(il);

        /* Allocate the RX queue, or reset if it is already allocated */
        if (!rxq->bd) {
                rc = il_rx_queue_alloc(il);
                if (rc) {
                        IL_ERR("Unable to initialize Rx queue\n");
                        return -ENOMEM;
                }
        } else
                il3945_rx_queue_reset(il, rxq);

        il3945_rx_replenish(il);

        il3945_rx_init(il, rxq);

        /* Look at using this instead:
           rxq->need_update = 1;
           il_rx_queue_update_write_ptr(il, rxq);
         */

        il_wr(il, FH39_RCSR_WPTR(0), rxq->write & ~7);

        rc = il3945_txq_ctx_reset(il);
        if (rc)
                return rc;

        set_bit(S_INIT, &il->status);

        return 0;
}

/**
 * il3945_hw_txq_ctx_free - Free TXQ Context
 *
 * Destroy all TX DMA queues and structures
 */
void
il3945_hw_txq_ctx_free(struct il_priv *il)
{
        int txq_id;

        /* Tx queues */
        if (il->txq)
                for (txq_id = 0; txq_id < il->hw_params.max_txq_num; txq_id++)
                        if (txq_id == IL39_CMD_QUEUE_NUM)
                                il_cmd_queue_free(il);
                        else
                                il_tx_queue_free(il, txq_id);

        /* free tx queue structure */
        il_free_txq_mem(il);
}

void
il3945_hw_txq_ctx_stop(struct il_priv *il)
{
        int txq_id;

        /* stop SCD */
        _il_wr_prph(il, ALM_SCD_MODE_REG, 0);
        _il_wr_prph(il, ALM_SCD_TXFACT_REG, 0);

        /* reset TFD queues */
        for (txq_id = 0; txq_id < il->hw_params.max_txq_num; txq_id++) {
                _il_wr(il, FH39_TCSR_CONFIG(txq_id), 0x0);
                _il_poll_bit(il, FH39_TSSR_TX_STATUS,
                             FH39_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE(txq_id),
                             FH39_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE(txq_id),
                             1000);
        }
}

/**
 * il3945_hw_reg_adjust_power_by_temp
 * return idx delta into power gain settings table
*/
static int
il3945_hw_reg_adjust_power_by_temp(int new_reading, int old_reading)
{
        return (new_reading - old_reading) * (-11) / 100;
}

/**
 * il3945_hw_reg_temp_out_of_range - Keep temperature in sane range
 */
static inline int
il3945_hw_reg_temp_out_of_range(int temperature)
{
        return (temperature < -260 || temperature > 25) ? 1 : 0;
}

int
il3945_hw_get_temperature(struct il_priv *il)
{
        return _il_rd(il, CSR_UCODE_DRV_GP2);
}

/**
 * il3945_hw_reg_txpower_get_temperature
 * get the current temperature by reading from NIC
*/
static int
il3945_hw_reg_txpower_get_temperature(struct il_priv *il)
{
        struct il3945_eeprom *eeprom = (struct il3945_eeprom *)il->eeprom;
        int temperature;

        temperature = il3945_hw_get_temperature(il);

        /* driver's okay range is -260 to +25.
         *   human readable okay range is 0 to +285 */
        D_INFO("Temperature: %d\n", temperature + IL_TEMP_CONVERT);

        /* handle insane temp reading */
        if (il3945_hw_reg_temp_out_of_range(temperature)) {
                IL_ERR("Error bad temperature value  %d\n", temperature);

                /* if really really hot(?),
                 *   substitute the 3rd band/group's temp measured at factory */
                if (il->last_temperature > 100)
                        temperature = eeprom->groups[2].temperature;
                else            /* else use most recent "sane" value from driver */
                        temperature = il->last_temperature;
        }

        return temperature;     /* raw, not "human readable" */
}

/* Adjust Txpower only if temperature variance is greater than threshold.
 *
 * Both are lower than older versions' 9 degrees */
#define IL_TEMPERATURE_LIMIT_TIMER   6

/**
 * il3945_is_temp_calib_needed - determines if new calibration is needed
 *
 * records new temperature in tx_mgr->temperature.
 * replaces tx_mgr->last_temperature *only* if calib needed
 *    (assumes caller will actually do the calibration!). */
static int
il3945_is_temp_calib_needed(struct il_priv *il)
{
        int temp_diff;

        il->temperature = il3945_hw_reg_txpower_get_temperature(il);
        temp_diff = il->temperature - il->last_temperature;

        /* get absolute value */
        if (temp_diff < 0) {
                D_POWER("Getting cooler, delta %d,\n", temp_diff);
                temp_diff = -temp_diff;
        } else if (temp_diff == 0)
                D_POWER("Same temp,\n");
        else
                D_POWER("Getting warmer, delta %d,\n", temp_diff);

        /* if we don't need calibration, *don't* update last_temperature */
        if (temp_diff < IL_TEMPERATURE_LIMIT_TIMER) {
                D_POWER("Timed thermal calib not needed\n");
                return 0;
        }

        D_POWER("Timed thermal calib needed\n");

        /* assume that caller will actually do calib ...
         *   update the "last temperature" value */
        il->last_temperature = il->temperature;
        return 1;
}

#define IL_MAX_GAIN_ENTRIES 78
#define IL_CCK_FROM_OFDM_POWER_DIFF  -5
#define IL_CCK_FROM_OFDM_IDX_DIFF (10)

/* radio and DSP power table, each step is 1/2 dB.
 * 1st number is for RF analog gain, 2nd number is for DSP pre-DAC gain. */
static struct il3945_tx_power power_gain_table[2][IL_MAX_GAIN_ENTRIES] = {
        {
         {251, 127},            /* 2.4 GHz, highest power */
         {251, 127},
         {251, 127},
         {251, 127},
         {251, 125},
         {251, 110},
         {251, 105},
         {251, 98},
         {187, 125},
         {187, 115},
         {187, 108},
         {187, 99},
         {243, 119},
         {243, 111},
         {243, 105},
         {243, 97},
         {243, 92},
         {211, 106},
         {211, 100},
         {179, 120},
         {179, 113},
         {179, 107},
         {147, 125},
         {147, 119},
         {147, 112},
         {147, 106},
         {147, 101},
         {147, 97},
         {147, 91},
         {115, 107},
         {235, 121},
         {235, 115},
         {235, 109},
         {203, 127},
         {203, 121},
         {203, 115},
         {203, 108},
         {203, 102},
         {203, 96},
         {203, 92},
         {171, 110},
         {171, 104},
         {171, 98},
         {139, 116},
         {227, 125},
         {227, 119},
         {227, 113},
         {227, 107},
         {227, 101},
         {227, 96},
         {195, 113},
         {195, 106},
         {195, 102},
         {195, 95},
         {163, 113},
         {163, 106},
         {163, 102},
         {163, 95},
         {131, 113},
         {131, 106},
         {131, 102},
         {131, 95},
         {99, 113},
         {99, 106},
         {99, 102},
         {99, 95},
         {67, 113},
         {67, 106},
         {67, 102},
         {67, 95},
         {35, 113},
         {35, 106},
         {35, 102},
         {35, 95},
         {3, 113},
         {3, 106},
         {3, 102},
         {3, 95}                /* 2.4 GHz, lowest power */
        },
        {
         {251, 127},            /* 5.x GHz, highest power */
         {251, 120},
         {251, 114},
         {219, 119},
         {219, 101},
         {187, 113},
         {187, 102},
         {155, 114},
         {155, 103},
         {123, 117},
         {123, 107},
         {123, 99},
         {123, 92},
         {91, 108},
         {59, 125},
         {59, 118},
         {59, 109},
         {59, 102},
         {59, 96},
         {59, 90},
         {27, 104},
         {27, 98},
         {27, 92},
         {115, 118},
         {115, 111},
         {115, 104},
         {83, 126},
         {83, 121},
         {83, 113},
         {83, 105},
         {83, 99},
         {51, 118},
         {51, 111},
         {51, 104},
         {51, 98},
         {19, 116},
         {19, 109},
         {19, 102},
         {19, 98},
         {19, 93},
         {171, 113},
         {171, 107},
         {171, 99},
         {139, 120},
         {139, 113},
         {139, 107},
         {139, 99},
         {107, 120},
         {107, 113},
         {107, 107},
         {107, 99},
         {75, 120},
         {75, 113},
         {75, 107},
         {75, 99},
         {43, 120},
         {43, 113},
         {43, 107},
         {43, 99},
         {11, 120},
         {11, 113},
         {11, 107},
         {11, 99},
         {131, 107},
         {131, 99},
         {99, 120},
         {99, 113},
         {99, 107},
         {99, 99},
         {67, 120},
         {67, 113},
         {67, 107},
         {67, 99},
         {35, 120},
         {35, 113},
         {35, 107},
         {35, 99},
         {3, 120}               /* 5.x GHz, lowest power */
        }
};

static inline u8
il3945_hw_reg_fix_power_idx(int idx)
{
        if (idx < 0)
                return 0;
        if (idx >= IL_MAX_GAIN_ENTRIES)
                return IL_MAX_GAIN_ENTRIES - 1;
        return (u8) idx;
}

/* Kick off thermal recalibration check every 60 seconds */
#define REG_RECALIB_PERIOD (60)

/**
 * il3945_hw_reg_set_scan_power - Set Tx power for scan probe requests
 *
 * Set (in our channel info database) the direct scan Tx power for 1 Mbit (CCK)
 * or 6 Mbit (OFDM) rates.
 */
static void
il3945_hw_reg_set_scan_power(struct il_priv *il, u32 scan_tbl_idx, s32 rate_idx,
                             const s8 *clip_pwrs,
                             struct il_channel_info *ch_info, int band_idx)
{
        struct il3945_scan_power_info *scan_power_info;
        s8 power;
        u8 power_idx;

        scan_power_info = &ch_info->scan_pwr_info[scan_tbl_idx];

        /* use this channel group's 6Mbit clipping/saturation pwr,
         *   but cap at regulatory scan power restriction (set during init
         *   based on eeprom channel data) for this channel.  */
        power = min(ch_info->scan_power, clip_pwrs[RATE_6M_IDX_TBL]);

        power = min(power, il->tx_power_user_lmt);
        scan_power_info->requested_power = power;

        /* find difference between new scan *power* and current "normal"
         *   Tx *power* for 6Mb.  Use this difference (x2) to adjust the
         *   current "normal" temperature-compensated Tx power *idx* for
         *   this rate (1Mb or 6Mb) to yield new temp-compensated scan power
         *   *idx*. */
        power_idx =
            ch_info->power_info[rate_idx].power_table_idx - (power -
                                                             ch_info->
                                                             power_info
                                                             [RATE_6M_IDX_TBL].
                                                             requested_power) *
            2;

        /* store reference idx that we use when adjusting *all* scan
         *   powers.  So we can accommodate user (all channel) or spectrum
         *   management (single channel) power changes "between" temperature
         *   feedback compensation procedures.
         * don't force fit this reference idx into gain table; it may be a
         *   negative number.  This will help avoid errors when we're at
         *   the lower bounds (highest gains, for warmest temperatures)
         *   of the table. */

        /* don't exceed table bounds for "real" setting */
        power_idx = il3945_hw_reg_fix_power_idx(power_idx);

        scan_power_info->power_table_idx = power_idx;
        scan_power_info->tpc.tx_gain =
            power_gain_table[band_idx][power_idx].tx_gain;
        scan_power_info->tpc.dsp_atten =
            power_gain_table[band_idx][power_idx].dsp_atten;
}

/**
 * il3945_send_tx_power - fill in Tx Power command with gain settings
 *
 * Configures power settings for all rates for the current channel,
 * using values from channel info struct, and send to NIC
 */
static int
il3945_send_tx_power(struct il_priv *il)
{
        int rate_idx, i;
        const struct il_channel_info *ch_info = NULL;
        struct il3945_txpowertable_cmd txpower = {
                .channel = il->active.channel,
        };
        u16 chan;

        if (WARN_ONCE
            (test_bit(S_SCAN_HW, &il->status),
             "TX Power requested while scanning!\n"))
                return -EAGAIN;

        chan = le16_to_cpu(il->active.channel);

        txpower.band = (il->band == IEEE80211_BAND_5GHZ) ? 0 : 1;
        ch_info = il_get_channel_info(il, il->band, chan);
        if (!ch_info) {
                IL_ERR("Failed to get channel info for channel %d [%d]\n", chan,
                       il->band);
                return -EINVAL;
        }

        if (!il_is_channel_valid(ch_info)) {
                D_POWER("Not calling TX_PWR_TBL_CMD on " "non-Tx channel.\n");
                return 0;
        }

        /* fill cmd with power settings for all rates for current channel */
        /* Fill OFDM rate */
        for (rate_idx = IL_FIRST_OFDM_RATE, i = 0;
             rate_idx <= IL39_LAST_OFDM_RATE; rate_idx++, i++) {

                txpower.power[i].tpc = ch_info->power_info[i].tpc;
                txpower.power[i].rate = il3945_rates[rate_idx].plcp;

                D_POWER("ch %d:%d rf %d dsp %3d rate code 0x%02x\n",
                        le16_to_cpu(txpower.channel), txpower.band,
                        txpower.power[i].tpc.tx_gain,
                        txpower.power[i].tpc.dsp_atten, txpower.power[i].rate);
        }
        /* Fill CCK rates */
        for (rate_idx = IL_FIRST_CCK_RATE; rate_idx <= IL_LAST_CCK_RATE;
             rate_idx++, i++) {
                txpower.power[i].tpc = ch_info->power_info[i].tpc;
                txpower.power[i].rate = il3945_rates[rate_idx].plcp;

                D_POWER("ch %d:%d rf %d dsp %3d rate code 0x%02x\n",
                        le16_to_cpu(txpower.channel), txpower.band,
                        txpower.power[i].tpc.tx_gain,
                        txpower.power[i].tpc.dsp_atten, txpower.power[i].rate);
        }

        return il_send_cmd_pdu(il, C_TX_PWR_TBL,
                               sizeof(struct il3945_txpowertable_cmd),
                               &txpower);

}

/**
 * il3945_hw_reg_set_new_power - Configures power tables at new levels
 * @ch_info: Channel to update.  Uses power_info.requested_power.
 *
 * Replace requested_power and base_power_idx ch_info fields for
 * one channel.
 *
 * Called if user or spectrum management changes power preferences.
 * Takes into account h/w and modulation limitations (clip power).
 *
 * This does *not* send anything to NIC, just sets up ch_info for one channel.
 *
 * NOTE: reg_compensate_for_temperature_dif() *must* be run after this to
 *       properly fill out the scan powers, and actual h/w gain settings,
 *       and send changes to NIC
 */
static int
il3945_hw_reg_set_new_power(struct il_priv *il, struct il_channel_info *ch_info)
{
        struct il3945_channel_power_info *power_info;
        int power_changed = 0;
        int i;
        const s8 *clip_pwrs;
        int power;

        /* Get this chnlgrp's rate-to-max/clip-powers table */
        clip_pwrs = il->_3945.clip_groups[ch_info->group_idx].clip_powers;

        /* Get this channel's rate-to-current-power settings table */
        power_info = ch_info->power_info;

        /* update OFDM Txpower settings */
        for (i = RATE_6M_IDX_TBL; i <= RATE_54M_IDX_TBL; i++, ++power_info) {
                int delta_idx;

                /* limit new power to be no more than h/w capability */
                power = min(ch_info->curr_txpow, clip_pwrs[i]);
                if (power == power_info->requested_power)
                        continue;

                /* find difference between old and new requested powers,
                 *    update base (non-temp-compensated) power idx */
                delta_idx = (power - power_info->requested_power) * 2;
                power_info->base_power_idx -= delta_idx;

                /* save new requested power value */
                power_info->requested_power = power;

                power_changed = 1;
        }

        /* update CCK Txpower settings, based on OFDM 12M setting ...
         *    ... all CCK power settings for a given channel are the *same*. */
        if (power_changed) {
                power =
                    ch_info->power_info[RATE_12M_IDX_TBL].requested_power +
                    IL_CCK_FROM_OFDM_POWER_DIFF;

                /* do all CCK rates' il3945_channel_power_info structures */
                for (i = RATE_1M_IDX_TBL; i <= RATE_11M_IDX_TBL; i++) {
                        power_info->requested_power = power;
                        power_info->base_power_idx =
                            ch_info->power_info[RATE_12M_IDX_TBL].
                            base_power_idx + IL_CCK_FROM_OFDM_IDX_DIFF;
                        ++power_info;
                }
        }

        return 0;
}

/**
 * il3945_hw_reg_get_ch_txpower_limit - returns new power limit for channel
 *
 * NOTE: Returned power limit may be less (but not more) than requested,
 *       based strictly on regulatory (eeprom and spectrum mgt) limitations
 *       (no consideration for h/w clipping limitations).
 */
static int
il3945_hw_reg_get_ch_txpower_limit(struct il_channel_info *ch_info)
{
        s8 max_power;

#if 0
        /* if we're using TGd limits, use lower of TGd or EEPROM */
        if (ch_info->tgd_data.max_power != 0)
                max_power =
                    min(ch_info->tgd_data.max_power,
                        ch_info->eeprom.max_power_avg);

        /* else just use EEPROM limits */
        else
#endif
                max_power = ch_info->eeprom.max_power_avg;

        return min(max_power, ch_info->max_power_avg);
}

/**
 * il3945_hw_reg_comp_txpower_temp - Compensate for temperature
 *
 * Compensate txpower settings of *all* channels for temperature.
 * This only accounts for the difference between current temperature
 *   and the factory calibration temperatures, and bases the new settings
 *   on the channel's base_power_idx.
 *
 * If RxOn is "associated", this sends the new Txpower to NIC!
 */
static int
il3945_hw_reg_comp_txpower_temp(struct il_priv *il)
{
        struct il_channel_info *ch_info = NULL;
        struct il3945_eeprom *eeprom = (struct il3945_eeprom *)il->eeprom;
        int delta_idx;
        const s8 *clip_pwrs;    /* array of h/w max power levels for each rate */
        u8 a_band;
        u8 rate_idx;
        u8 scan_tbl_idx;
        u8 i;
        int ref_temp;
        int temperature = il->temperature;

        if (il->disable_tx_power_cal || test_bit(S_SCANNING, &il->status)) {
                /* do not perform tx power calibration */
                return 0;
        }
        /* set up new Tx power info for each and every channel, 2.4 and 5.x */
        for (i = 0; i < il->channel_count; i++) {
                ch_info = &il->channel_info[i];
                a_band = il_is_channel_a_band(ch_info);

                /* Get this chnlgrp's factory calibration temperature */
                ref_temp = (s16) eeprom->groups[ch_info->group_idx].temperature;

                /* get power idx adjustment based on current and factory
                 * temps */
                delta_idx =
                    il3945_hw_reg_adjust_power_by_temp(temperature, ref_temp);

                /* set tx power value for all rates, OFDM and CCK */
                for (rate_idx = 0; rate_idx < RATE_COUNT_3945; rate_idx++) {
                        int power_idx =
                            ch_info->power_info[rate_idx].base_power_idx;

                        /* temperature compensate */
                        power_idx += delta_idx;

                        /* stay within table range */
                        power_idx = il3945_hw_reg_fix_power_idx(power_idx);
                        ch_info->power_info[rate_idx].power_table_idx =
                            (u8) power_idx;
                        ch_info->power_info[rate_idx].tpc =
                            power_gain_table[a_band][power_idx];
                }

                /* Get this chnlgrp's rate-to-max/clip-powers table */
                clip_pwrs =
                    il->_3945.clip_groups[ch_info->group_idx].clip_powers;

                /* set scan tx power, 1Mbit for CCK, 6Mbit for OFDM */
                for (scan_tbl_idx = 0; scan_tbl_idx < IL_NUM_SCAN_RATES;
                     scan_tbl_idx++) {
                        s32 actual_idx =
                            (scan_tbl_idx ==
                             0) ? RATE_1M_IDX_TBL : RATE_6M_IDX_TBL;
                        il3945_hw_reg_set_scan_power(il, scan_tbl_idx,
                                                     actual_idx, clip_pwrs,
                                                     ch_info, a_band);
                }
        }

        /* send Txpower command for current channel to ucode */
        return il->ops->send_tx_power(il);
}

int
il3945_hw_reg_set_txpower(struct il_priv *il, s8 power)
{
        struct il_channel_info *ch_info;
        s8 max_power;
        u8 a_band;
        u8 i;

        if (il->tx_power_user_lmt == power) {
                D_POWER("Requested Tx power same as current " "limit: %ddBm.\n",
                        power);
                return 0;
        }

        D_POWER("Setting upper limit clamp to %ddBm.\n", power);
        il->tx_power_user_lmt = power;

        /* set up new Tx powers for each and every channel, 2.4 and 5.x */

        for (i = 0; i < il->channel_count; i++) {
                ch_info = &il->channel_info[i];
                a_band = il_is_channel_a_band(ch_info);

                /* find minimum power of all user and regulatory constraints
                 *    (does not consider h/w clipping limitations) */
                max_power = il3945_hw_reg_get_ch_txpower_limit(ch_info);
                max_power = min(power, max_power);
                if (max_power != ch_info->curr_txpow) {
                        ch_info->curr_txpow = max_power;

                        /* this considers the h/w clipping limitations */
                        il3945_hw_reg_set_new_power(il, ch_info);
                }
        }

        /* update txpower settings for all channels,
         *   send to NIC if associated. */
        il3945_is_temp_calib_needed(il);
        il3945_hw_reg_comp_txpower_temp(il);

        return 0;
}

static int
il3945_send_rxon_assoc(struct il_priv *il)
{
        int rc = 0;
        struct il_rx_pkt *pkt;
        struct il3945_rxon_assoc_cmd rxon_assoc;
        struct il_host_cmd cmd = {
                .id = C_RXON_ASSOC,
                .len = sizeof(rxon_assoc),
                .flags = CMD_WANT_SKB,
                .data = &rxon_assoc,
        };
        const struct il_rxon_cmd *rxon1 = &il->staging;
        const struct il_rxon_cmd *rxon2 = &il->active;

        if (rxon1->flags == rxon2->flags &&
            rxon1->filter_flags == rxon2->filter_flags &&
            rxon1->cck_basic_rates == rxon2->cck_basic_rates &&
            rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates) {
                D_INFO("Using current RXON_ASSOC.  Not resending.\n");
                return 0;
        }

        rxon_assoc.flags = il->staging.flags;
        rxon_assoc.filter_flags = il->staging.filter_flags;
        rxon_assoc.ofdm_basic_rates = il->staging.ofdm_basic_rates;
        rxon_assoc.cck_basic_rates = il->staging.cck_basic_rates;
        rxon_assoc.reserved = 0;

        rc = il_send_cmd_sync(il, &cmd);
        if (rc)
                return rc;

        pkt = (struct il_rx_pkt *)cmd.reply_page;
        if (pkt->hdr.flags & IL_CMD_FAILED_MSK) {
                IL_ERR("Bad return from C_RXON_ASSOC command\n");
                rc = -EIO;
        }

        il_free_pages(il, cmd.reply_page);

        return rc;
}

/**
 * il3945_commit_rxon - commit staging_rxon to hardware
 *
 * The RXON command in staging_rxon is committed to the hardware and
 * the active_rxon structure is updated with the new data.  This
 * function correctly transitions out of the RXON_ASSOC_MSK state if
 * a HW tune is required based on the RXON structure changes.
 */
int
il3945_commit_rxon(struct il_priv *il)
{
        /* cast away the const for active_rxon in this function */
        struct il3945_rxon_cmd *active_rxon = (void *)&il->active;
        struct il3945_rxon_cmd *staging_rxon = (void *)&il->staging;
        int rc = 0;
        bool new_assoc = !!(staging_rxon->filter_flags & RXON_FILTER_ASSOC_MSK);

        if (test_bit(S_EXIT_PENDING, &il->status))
                return -EINVAL;

        if (!il_is_alive(il))
                return -1;

        /* always get timestamp with Rx frame */
        staging_rxon->flags |= RXON_FLG_TSF2HOST_MSK;

        /* select antenna */
        staging_rxon->flags &= ~(RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_SEL_MSK);
        staging_rxon->flags |= il3945_get_antenna_flags(il);

        rc = il_check_rxon_cmd(il);
        if (rc) {
                IL_ERR("Invalid RXON configuration.  Not committing.\n");
                return -EINVAL;
        }

        /* If we don't need to send a full RXON, we can use
         * il3945_rxon_assoc_cmd which is used to reconfigure filter
         * and other flags for the current radio configuration. */
        if (!il_full_rxon_required(il)) {
                rc = il_send_rxon_assoc(il);
                if (rc) {
                        IL_ERR("Error setting RXON_ASSOC "
                               "configuration (%d).\n", rc);
                        return rc;
                }

                memcpy(active_rxon, staging_rxon, sizeof(*active_rxon));
                /*
                 * We do not commit tx power settings while channel changing,
                 * do it now if tx power changed.
                 */
                il_set_tx_power(il, il->tx_power_next, false);
                return 0;
        }

        /* If we are currently associated and the new config requires
         * an RXON_ASSOC and the new config wants the associated mask enabled,
         * we must clear the associated from the active configuration
         * before we apply the new config */
        if (il_is_associated(il) && new_assoc) {
                D_INFO("Toggling associated bit on current RXON\n");
                active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;

                /*
                 * reserved4 and 5 could have been filled by the iwlcore code.
                 * Let's clear them before pushing to the 3945.
                 */
                active_rxon->reserved4 = 0;
                active_rxon->reserved5 = 0;
                rc = il_send_cmd_pdu(il, C_RXON, sizeof(struct il3945_rxon_cmd),
                                     &il->active);

                /* If the mask clearing failed then we set
                 * active_rxon back to what it was previously */
                if (rc) {
                        active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK;
                        IL_ERR("Error clearing ASSOC_MSK on current "
                               "configuration (%d).\n", rc);
                        return rc;
                }
                il_clear_ucode_stations(il);
                il_restore_stations(il);
        }

        D_INFO("Sending RXON\n" "* with%s RXON_FILTER_ASSOC_MSK\n"
               "* channel = %d\n" "* bssid = %pM\n", (new_assoc ? "" : "out"),
               le16_to_cpu(staging_rxon->channel), staging_rxon->bssid_addr);

        /*
         * reserved4 and 5 could have been filled by the iwlcore code.
         * Let's clear them before pushing to the 3945.
         */
        staging_rxon->reserved4 = 0;
        staging_rxon->reserved5 = 0;

        il_set_rxon_hwcrypto(il, !il3945_mod_params.sw_crypto);

        /* Apply the new configuration */
        rc = il_send_cmd_pdu(il, C_RXON, sizeof(struct il3945_rxon_cmd),
                             staging_rxon);
        if (rc) {
                IL_ERR("Error setting new configuration (%d).\n", rc);
                return rc;
        }

        memcpy(active_rxon, staging_rxon, sizeof(*active_rxon));

        if (!new_assoc) {
                il_clear_ucode_stations(il);
                il_restore_stations(il);
        }

        /* If we issue a new RXON command which required a tune then we must
         * send a new TXPOWER command or we won't be able to Tx any frames */
        rc = il_set_tx_power(il, il->tx_power_next, true);
        if (rc) {
                IL_ERR("Error setting Tx power (%d).\n", rc);
                return rc;
        }

        /* Init the hardware's rate fallback order based on the band */
        rc = il3945_init_hw_rate_table(il);
        if (rc) {
                IL_ERR("Error setting HW rate table: %02X\n", rc);
                return -EIO;
        }

        return 0;
}

/**
 * il3945_reg_txpower_periodic -  called when time to check our temperature.
 *
 * -- reset periodic timer
 * -- see if temp has changed enough to warrant re-calibration ... if so:
 *     -- correct coeffs for temp (can reset temp timer)
 *     -- save this temp as "last",
 *     -- send new set of gain settings to NIC
 * NOTE:  This should continue working, even when we're not associated,
 *   so we can keep our internal table of scan powers current. */
void
il3945_reg_txpower_periodic(struct il_priv *il)
{
        /* This will kick in the "brute force"
         * il3945_hw_reg_comp_txpower_temp() below */
        if (!il3945_is_temp_calib_needed(il))
                goto reschedule;

        /* Set up a new set of temp-adjusted TxPowers, send to NIC.
         * This is based *only* on current temperature,
         * ignoring any previous power measurements */
        il3945_hw_reg_comp_txpower_temp(il);

reschedule:
        queue_delayed_work(il->workqueue, &il->_3945.thermal_periodic,
                           REG_RECALIB_PERIOD * HZ);
}

static void
il3945_bg_reg_txpower_periodic(struct work_struct *work)
{
        struct il_priv *il = container_of(work, struct il_priv,
                                          _3945.thermal_periodic.work);

        mutex_lock(&il->mutex);
        if (test_bit(S_EXIT_PENDING, &il->status) || il->txq == NULL)
                goto out;

        il3945_reg_txpower_periodic(il);
out:
        mutex_unlock(&il->mutex);
}

/**
 * il3945_hw_reg_get_ch_grp_idx - find the channel-group idx (0-4) for channel.
 *
 * This function is used when initializing channel-info structs.
 *
 * NOTE: These channel groups do *NOT* match the bands above!
 *       These channel groups are based on factory-tested channels;
 *       on A-band, EEPROM's "group frequency" entries represent the top
 *       channel in each group 1-4.  Group 5 All B/G channels are in group 0.
 */
static u16
il3945_hw_reg_get_ch_grp_idx(struct il_priv *il,
                             const struct il_channel_info *ch_info)
{
        struct il3945_eeprom *eeprom = (struct il3945_eeprom *)il->eeprom;
        struct il3945_eeprom_txpower_group *ch_grp = &eeprom->groups[0];
        u8 group;
        u16 group_idx = 0;      /* based on factory calib frequencies */
        u8 grp_channel;

        /* Find the group idx for the channel ... don't use idx 1(?) */
        if (il_is_channel_a_band(ch_info)) {
                for (group = 1; group < 5; group++) {
                        grp_channel = ch_grp[group].group_channel;
                        if (ch_info->channel <= grp_channel) {
                                group_idx = group;
                                break;
                        }
                }
                /* group 4 has a few channels *above* its factory cal freq */
                if (group == 5)
                        group_idx = 4;
        } else
                group_idx = 0;  /* 2.4 GHz, group 0 */

        D_POWER("Chnl %d mapped to grp %d\n", ch_info->channel, group_idx);
        return group_idx;
}

/**
 * il3945_hw_reg_get_matched_power_idx - Interpolate to get nominal idx
 *
 * Interpolate to get nominal (i.e. at factory calibration temperature) idx
 *   into radio/DSP gain settings table for requested power.
 */
static int
il3945_hw_reg_get_matched_power_idx(struct il_priv *il, s8 requested_power,
                                    s32 setting_idx, s32 *new_idx)
{
        const struct il3945_eeprom_txpower_group *chnl_grp = NULL;
        struct il3945_eeprom *eeprom = (struct il3945_eeprom *)il->eeprom;
        s32 idx0, idx1;
        s32 power = 2 * requested_power;
        s32 i;
        const struct il3945_eeprom_txpower_sample *samples;
        s32 gains0, gains1;
        s32 res;
        s32 denominator;

        chnl_grp = &eeprom->groups[setting_idx];
        samples = chnl_grp->samples;
        for (i = 0; i < 5; i++) {
                if (power == samples[i].power) {
                        *new_idx = samples[i].gain_idx;
                        return 0;
                }
        }

        if (power > samples[1].power) {
                idx0 = 0;
                idx1 = 1;
        } else if (power > samples[2].power) {
                idx0 = 1;
                idx1 = 2;
        } else if (power > samples[3].power) {
                idx0 = 2;
                idx1 = 3;
        } else {
                idx0 = 3;
                idx1 = 4;
        }

        denominator = (s32) samples[idx1].power - (s32) samples[idx0].power;
        if (denominator == 0)
                return -EINVAL;
        gains0 = (s32) samples[idx0].gain_idx * (1 << 19);
        gains1 = (s32) samples[idx1].gain_idx * (1 << 19);
        res =
            gains0 + (gains1 - gains0) * ((s32) power -
                                          (s32) samples[idx0].power) /
            denominator + (1 << 18);
        *new_idx = res >> 19;
        return 0;
}

static void
il3945_hw_reg_init_channel_groups(struct il_priv *il)
{
        u32 i;
        s32 rate_idx;
        struct il3945_eeprom *eeprom = (struct il3945_eeprom *)il->eeprom;
        const struct il3945_eeprom_txpower_group *group;

        D_POWER("Initializing factory calib info from EEPROM\n");

        for (i = 0; i < IL_NUM_TX_CALIB_GROUPS; i++) {
                s8 *clip_pwrs;  /* table of power levels for each rate */
                s8 satur_pwr;   /* saturation power for each chnl group */
                group = &eeprom->groups[i];

                /* sanity check on factory saturation power value */
                if (group->saturation_power < 40) {
                        IL_WARN("Error: saturation power is %d, "
                                "less than minimum expected 40\n",
                                group->saturation_power);
                        return;
                }

                /*
                 * Derive requested power levels for each rate, based on
                 *   hardware capabilities (saturation power for band).
                 * Basic value is 3dB down from saturation, with further
                 *   power reductions for highest 3 data rates.  These
                 *   backoffs provide headroom for high rate modulation
                 *   power peaks, without too much distortion (clipping).
                 */
                /* we'll fill in this array with h/w max power levels */
                clip_pwrs = (s8 *) il->_3945.clip_groups[i].clip_powers;

                /* divide factory saturation power by 2 to find -3dB level */
                satur_pwr = (s8) (group->saturation_power >> 1);

                /* fill in channel group's nominal powers for each rate */
                for (rate_idx = 0; rate_idx < RATE_COUNT_3945;
                     rate_idx++, clip_pwrs++) {
                        switch (rate_idx) {
                        case RATE_36M_IDX_TBL:
                                if (i == 0)     /* B/G */
                                        *clip_pwrs = satur_pwr;
                                else    /* A */
                                        *clip_pwrs = satur_pwr - 5;
                                break;
                        case RATE_48M_IDX_TBL:
                                if (i == 0)
                                        *clip_pwrs = satur_pwr - 7;
                                else
                                        *clip_pwrs = satur_pwr - 10;
                                break;
                        case RATE_54M_IDX_TBL:
                                if (i == 0)
                                        *clip_pwrs = satur_pwr - 9;
                                else
                                        *clip_pwrs = satur_pwr - 12;
                                break;
                        default:
                                *clip_pwrs = satur_pwr;
                                break;
                        }
                }
        }
}

/**
 * il3945_txpower_set_from_eeprom - Set channel power info based on EEPROM
 *
 * Second pass (during init) to set up il->channel_info
 *
 * Set up Tx-power settings in our channel info database for each VALID
 * (for this geo/SKU) channel, at all Tx data rates, based on eeprom values
 * and current temperature.
 *
 * Since this is based on current temperature (at init time), these values may
 * not be valid for very long, but it gives us a starting/default point,
 * and allows us to active (i.e. using Tx) scan.
 *
 * This does *not* write values to NIC, just sets up our internal table.
 */
int
il3945_txpower_set_from_eeprom(struct il_priv *il)
{
        struct il_channel_info *ch_info = NULL;
        struct il3945_channel_power_info *pwr_info;
        struct il3945_eeprom *eeprom = (struct il3945_eeprom *)il->eeprom;
        int delta_idx;
        u8 rate_idx;
        u8 scan_tbl_idx;
        const s8 *clip_pwrs;    /* array of power levels for each rate */
        u8 gain, dsp_atten;
        s8 power;
        u8 pwr_idx, base_pwr_idx, a_band;
        u8 i;
        int temperature;

        /* save temperature reference,
         *   so we can determine next time to calibrate */
        temperature = il3945_hw_reg_txpower_get_temperature(il);
        il->last_temperature = temperature;

        il3945_hw_reg_init_channel_groups(il);

        /* initialize Tx power info for each and every channel, 2.4 and 5.x */
        for (i = 0, ch_info = il->channel_info; i < il->channel_count;
             i++, ch_info++) {
                a_band = il_is_channel_a_band(ch_info);
                if (!il_is_channel_valid(ch_info))
                        continue;

                /* find this channel's channel group (*not* "band") idx */
                ch_info->group_idx = il3945_hw_reg_get_ch_grp_idx(il, ch_info);

                /* Get this chnlgrp's rate->max/clip-powers table */
                clip_pwrs =
                    il->_3945.clip_groups[ch_info->group_idx].clip_powers;

                /* calculate power idx *adjustment* value according to
                 *  diff between current temperature and factory temperature */
                delta_idx =
                    il3945_hw_reg_adjust_power_by_temp(temperature,
                                                       eeprom->groups[ch_info->
                                                                      group_idx].
                                                       temperature);

                D_POWER("Delta idx for channel %d: %d [%d]\n", ch_info->channel,
                        delta_idx, temperature + IL_TEMP_CONVERT);

                /* set tx power value for all OFDM rates */
                for (rate_idx = 0; rate_idx < IL_OFDM_RATES; rate_idx++) {
                        s32 uninitialized_var(power_idx);
                        int rc;

                        /* use channel group's clip-power table,
                         *   but don't exceed channel's max power */
                        s8 pwr = min(ch_info->max_power_avg,
                                     clip_pwrs[rate_idx]);

                        pwr_info = &ch_info->power_info[rate_idx];

                        /* get base (i.e. at factory-measured temperature)
                         *    power table idx for this rate's power */
                        rc = il3945_hw_reg_get_matched_power_idx(il, pwr,
                                                                 ch_info->
                                                                 group_idx,
                                                                 &power_idx);
                        if (rc) {
                                IL_ERR("Invalid power idx\n");
                                return rc;
                        }
                        pwr_info->base_power_idx = (u8) power_idx;

                        /* temperature compensate */
                        power_idx += delta_idx;

                        /* stay within range of gain table */
                        power_idx = il3945_hw_reg_fix_power_idx(power_idx);

                        /* fill 1 OFDM rate's il3945_channel_power_info struct */
                        pwr_info->requested_power = pwr;
                        pwr_info->power_table_idx = (u8) power_idx;
                        pwr_info->tpc.tx_gain =
                            power_gain_table[a_band][power_idx].tx_gain;
                        pwr_info->tpc.dsp_atten =
                            power_gain_table[a_band][power_idx].dsp_atten;
                }

                /* set tx power for CCK rates, based on OFDM 12 Mbit settings */
                pwr_info = &ch_info->power_info[RATE_12M_IDX_TBL];
                power = pwr_info->requested_power + IL_CCK_FROM_OFDM_POWER_DIFF;
                pwr_idx = pwr_info->power_table_idx + IL_CCK_FROM_OFDM_IDX_DIFF;
                base_pwr_idx =
                    pwr_info->base_power_idx + IL_CCK_FROM_OFDM_IDX_DIFF;

                /* stay within table range */
                pwr_idx = il3945_hw_reg_fix_power_idx(pwr_idx);
                gain = power_gain_table[a_band][pwr_idx].tx_gain;
                dsp_atten = power_gain_table[a_band][pwr_idx].dsp_atten;

                /* fill each CCK rate's il3945_channel_power_info structure
                 * NOTE:  All CCK-rate Txpwrs are the same for a given chnl!
                 * NOTE:  CCK rates start at end of OFDM rates! */
                for (rate_idx = 0; rate_idx < IL_CCK_RATES; rate_idx++) {
                        pwr_info =
                            &ch_info->power_info[rate_idx + IL_OFDM_RATES];
                        pwr_info->requested_power = power;
                        pwr_info->power_table_idx = pwr_idx;
                        pwr_info->base_power_idx = base_pwr_idx;
                        pwr_info->tpc.tx_gain = gain;
                        pwr_info->tpc.dsp_atten = dsp_atten;
                }

                /* set scan tx power, 1Mbit for CCK, 6Mbit for OFDM */
                for (scan_tbl_idx = 0; scan_tbl_idx < IL_NUM_SCAN_RATES;
                     scan_tbl_idx++) {
                        s32 actual_idx =
                            (scan_tbl_idx ==
                             0) ? RATE_1M_IDX_TBL : RATE_6M_IDX_TBL;
                        il3945_hw_reg_set_scan_power(il, scan_tbl_idx,
                                                     actual_idx, clip_pwrs,
                                                     ch_info, a_band);
                }
        }

        return 0;
}

int
il3945_hw_rxq_stop(struct il_priv *il)
{
        int ret;

        _il_wr(il, FH39_RCSR_CONFIG(0), 0);
        ret = _il_poll_bit(il, FH39_RSSR_STATUS,
                           FH39_RSSR_CHNL0_RX_STATUS_CHNL_IDLE,
                           FH39_RSSR_CHNL0_RX_STATUS_CHNL_IDLE,
                           1000);
        if (ret < 0)
                IL_ERR("Can't stop Rx DMA.\n");

        return 0;
}

int
il3945_hw_tx_queue_init(struct il_priv *il, struct il_tx_queue *txq)
{
        int txq_id = txq->q.id;

        struct il3945_shared *shared_data = il->_3945.shared_virt;

        shared_data->tx_base_ptr[txq_id] = cpu_to_le32((u32) txq->q.dma_addr);

        il_wr(il, FH39_CBCC_CTRL(txq_id), 0);
        il_wr(il, FH39_CBCC_BASE(txq_id), 0);

        il_wr(il, FH39_TCSR_CONFIG(txq_id),
              FH39_TCSR_TX_CONFIG_REG_VAL_CIRQ_RTC_NOINT |
              FH39_TCSR_TX_CONFIG_REG_VAL_MSG_MODE_TXF |
              FH39_TCSR_TX_CONFIG_REG_VAL_CIRQ_HOST_IFTFD |
              FH39_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_ENABLE_VAL |
              FH39_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE);

        /* fake read to flush all prev. writes */
        _il_rd(il, FH39_TSSR_CBB_BASE);

        return 0;
}

/*
 * HCMD utils
 */
static u16
il3945_get_hcmd_size(u8 cmd_id, u16 len)
{
        switch (cmd_id) {
        case C_RXON:
                return sizeof(struct il3945_rxon_cmd);
        case C_POWER_TBL:
                return sizeof(struct il3945_powertable_cmd);
        default:
                return len;
        }
}

static u16
il3945_build_addsta_hcmd(const struct il_addsta_cmd *cmd, u8 * data)
{
        struct il3945_addsta_cmd *addsta = (struct il3945_addsta_cmd *)data;
        addsta->mode = cmd->mode;
        memcpy(&addsta->sta, &cmd->sta, sizeof(struct sta_id_modify));
        memcpy(&addsta->key, &cmd->key, sizeof(struct il4965_keyinfo));
        addsta->station_flags = cmd->station_flags;
        addsta->station_flags_msk = cmd->station_flags_msk;
        addsta->tid_disable_tx = cpu_to_le16(0);
        addsta->rate_n_flags = cmd->rate_n_flags;
        addsta->add_immediate_ba_tid = cmd->add_immediate_ba_tid;
        addsta->remove_immediate_ba_tid = cmd->remove_immediate_ba_tid;
        addsta->add_immediate_ba_ssn = cmd->add_immediate_ba_ssn;

        return (u16) sizeof(struct il3945_addsta_cmd);
}

static int
il3945_add_bssid_station(struct il_priv *il, const u8 * addr, u8 * sta_id_r)
{
        int ret;
        u8 sta_id;
        unsigned long flags;

        if (sta_id_r)
                *sta_id_r = IL_INVALID_STATION;

        ret = il_add_station_common(il, addr, 0, NULL, &sta_id);
        if (ret) {
                IL_ERR("Unable to add station %pM\n", addr);
                return ret;
        }

        if (sta_id_r)
                *sta_id_r = sta_id;

        spin_lock_irqsave(&il->sta_lock, flags);
        il->stations[sta_id].used |= IL_STA_LOCAL;
        spin_unlock_irqrestore(&il->sta_lock, flags);

        return 0;
}

static int
il3945_manage_ibss_station(struct il_priv *il, struct ieee80211_vif *vif,
                           bool add)
{
        struct il_vif_priv *vif_priv = (void *)vif->drv_priv;
        int ret;

        if (add) {
                ret =
                    il3945_add_bssid_station(il, vif->bss_conf.bssid,
                                             &vif_priv->ibss_bssid_sta_id);
                if (ret)
                        return ret;

                il3945_sync_sta(il, vif_priv->ibss_bssid_sta_id,
                                (il->band ==
                                 IEEE80211_BAND_5GHZ) ? RATE_6M_PLCP :
                                RATE_1M_PLCP);
                il3945_rate_scale_init(il->hw, vif_priv->ibss_bssid_sta_id);

                return 0;
        }

        return il_remove_station(il, vif_priv->ibss_bssid_sta_id,
                                 vif->bss_conf.bssid);
}

/**
 * il3945_init_hw_rate_table - Initialize the hardware rate fallback table
 */
int
il3945_init_hw_rate_table(struct il_priv *il)
{
        int rc, i, idx, prev_idx;
        struct il3945_rate_scaling_cmd rate_cmd = {
                .reserved = {0, 0, 0},
        };
        struct il3945_rate_scaling_info *table = rate_cmd.table;

        for (i = 0; i < ARRAY_SIZE(il3945_rates); i++) {
                idx = il3945_rates[i].table_rs_idx;

                table[idx].rate_n_flags = cpu_to_le16(il3945_rates[i].plcp);
                table[idx].try_cnt = il->retry_rate;
                prev_idx = il3945_get_prev_ieee_rate(i);
                table[idx].next_rate_idx = il3945_rates[prev_idx].table_rs_idx;
        }

        switch (il->band) {
        case IEEE80211_BAND_5GHZ:
                D_RATE("Select A mode rate scale\n");
                /* If one of the following CCK rates is used,
                 * have it fall back to the 6M OFDM rate */
                for (i = RATE_1M_IDX_TBL; i <= RATE_11M_IDX_TBL; i++)
                        table[i].next_rate_idx =
                            il3945_rates[IL_FIRST_OFDM_RATE].table_rs_idx;

                /* Don't fall back to CCK rates */
                table[RATE_12M_IDX_TBL].next_rate_idx = RATE_9M_IDX_TBL;

                /* Don't drop out of OFDM rates */
                table[RATE_6M_IDX_TBL].next_rate_idx =
                    il3945_rates[IL_FIRST_OFDM_RATE].table_rs_idx;
                break;

        case IEEE80211_BAND_2GHZ:
                D_RATE("Select B/G mode rate scale\n");
                /* If an OFDM rate is used, have it fall back to the
                 * 1M CCK rates */

                if (!(il->_3945.sta_supp_rates & IL_OFDM_RATES_MASK) &&
                    il_is_associated(il)) {

                        idx = IL_FIRST_CCK_RATE;
                        for (i = RATE_6M_IDX_TBL; i <= RATE_54M_IDX_TBL; i++)
                                table[i].next_rate_idx =
                                    il3945_rates[idx].table_rs_idx;

                        idx = RATE_11M_IDX_TBL;
                        /* CCK shouldn't fall back to OFDM... */
                        table[idx].next_rate_idx = RATE_5M_IDX_TBL;
                }
                break;

        default:
                WARN_ON(1);
                break;
        }

        /* Update the rate scaling for control frame Tx */
        rate_cmd.table_id = 0;
        rc = il_send_cmd_pdu(il, C_RATE_SCALE, sizeof(rate_cmd), &rate_cmd);
        if (rc)
                return rc;

        /* Update the rate scaling for data frame Tx */
        rate_cmd.table_id = 1;
        return il_send_cmd_pdu(il, C_RATE_SCALE, sizeof(rate_cmd), &rate_cmd);
}

/* Called when initializing driver */
int
il3945_hw_set_hw_params(struct il_priv *il)
{
        memset((void *)&il->hw_params, 0, sizeof(struct il_hw_params));

        il->_3945.shared_virt =
            dma_alloc_coherent(&il->pci_dev->dev, sizeof(struct il3945_shared),
                               &il->_3945.shared_phys, GFP_KERNEL);
        if (!il->_3945.shared_virt)
                return -ENOMEM;

        il->hw_params.bcast_id = IL3945_BROADCAST_ID;

        /* Assign number of Usable TX queues */
        il->hw_params.max_txq_num = il->cfg->num_of_queues;

        il->hw_params.tfd_size = sizeof(struct il3945_tfd);
        il->hw_params.rx_page_order = get_order(IL_RX_BUF_SIZE_3K);
        il->hw_params.max_rxq_size = RX_QUEUE_SIZE;
        il->hw_params.max_rxq_log = RX_QUEUE_SIZE_LOG;
        il->hw_params.max_stations = IL3945_STATION_COUNT;

        il->sta_key_max_num = STA_KEY_MAX_NUM;

        il->hw_params.rx_wrt_ptr_reg = FH39_RSCSR_CHNL0_WPTR;
        il->hw_params.max_beacon_itrvl = IL39_MAX_UCODE_BEACON_INTERVAL;
        il->hw_params.beacon_time_tsf_bits = IL3945_EXT_BEACON_TIME_POS;

        return 0;
}

unsigned int
il3945_hw_get_beacon_cmd(struct il_priv *il, struct il3945_frame *frame,
                         u8 rate)
{
        struct il3945_tx_beacon_cmd *tx_beacon_cmd;
        unsigned int frame_size;

        tx_beacon_cmd = (struct il3945_tx_beacon_cmd *)&frame->u;
        memset(tx_beacon_cmd, 0, sizeof(*tx_beacon_cmd));

        tx_beacon_cmd->tx.sta_id = il->hw_params.bcast_id;
        tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;

        frame_size =
            il3945_fill_beacon_frame(il, tx_beacon_cmd->frame,
                                     sizeof(frame->u) - sizeof(*tx_beacon_cmd));

        BUG_ON(frame_size > MAX_MPDU_SIZE);
        tx_beacon_cmd->tx.len = cpu_to_le16((u16) frame_size);

        tx_beacon_cmd->tx.rate = rate;
        tx_beacon_cmd->tx.tx_flags =
            (TX_CMD_FLG_SEQ_CTL_MSK | TX_CMD_FLG_TSF_MSK);

        /* supp_rates[0] == OFDM start at IL_FIRST_OFDM_RATE */
        tx_beacon_cmd->tx.supp_rates[0] =
            (IL_OFDM_BASIC_RATES_MASK >> IL_FIRST_OFDM_RATE) & 0xFF;

        tx_beacon_cmd->tx.supp_rates[1] = (IL_CCK_BASIC_RATES_MASK & 0xF);

        return sizeof(struct il3945_tx_beacon_cmd) + frame_size;
}

void
il3945_hw_handler_setup(struct il_priv *il)
{
        il->handlers[C_TX] = il3945_hdl_tx;
        il->handlers[N_3945_RX] = il3945_hdl_rx;
}

void
il3945_hw_setup_deferred_work(struct il_priv *il)
{
        INIT_DELAYED_WORK(&il->_3945.thermal_periodic,
                          il3945_bg_reg_txpower_periodic);
}

void
il3945_hw_cancel_deferred_work(struct il_priv *il)
{
        cancel_delayed_work(&il->_3945.thermal_periodic);
}

/* check contents of special bootstrap uCode SRAM */
static int
il3945_verify_bsm(struct il_priv *il)
{
        __le32 *image = il->ucode_boot.v_addr;
        u32 len = il->ucode_boot.len;
        u32 reg;
        u32 val;

        D_INFO("Begin verify bsm\n");

        /* verify BSM SRAM contents */
        val = il_rd_prph(il, BSM_WR_DWCOUNT_REG);
        for (reg = BSM_SRAM_LOWER_BOUND; reg < BSM_SRAM_LOWER_BOUND + len;
             reg += sizeof(u32), image++) {
                val = il_rd_prph(il, reg);
                if (val != le32_to_cpu(*image)) {
                        IL_ERR("BSM uCode verification failed at "
                               "addr 0x%08X+%u (of %u), is 0x%x, s/b 0x%x\n",
                               BSM_SRAM_LOWER_BOUND, reg - BSM_SRAM_LOWER_BOUND,
                               len, val, le32_to_cpu(*image));
                        return -EIO;
                }
        }

        D_INFO("BSM bootstrap uCode image OK\n");

        return 0;
}

/******************************************************************************
 *
 * EEPROM related functions
 *
 ******************************************************************************/

/*
 * Clear the OWNER_MSK, to establish driver (instead of uCode running on
 * embedded controller) as EEPROM reader; each read is a series of pulses
 * to/from the EEPROM chip, not a single event, so even reads could conflict
 * if they weren't arbitrated by some ownership mechanism.  Here, the driver
 * simply claims ownership, which should be safe when this function is called
 * (i.e. before loading uCode!).
 */
static int
il3945_eeprom_acquire_semaphore(struct il_priv *il)
{
        _il_clear_bit(il, CSR_EEPROM_GP, CSR_EEPROM_GP_IF_OWNER_MSK);
        return 0;
}

static void
il3945_eeprom_release_semaphore(struct il_priv *il)
{
        return;
}

 /**
  * il3945_load_bsm - Load bootstrap instructions
  *
  * BSM operation:
  *
  * The Bootstrap State Machine (BSM) stores a short bootstrap uCode program
  * in special SRAM that does not power down during RFKILL.  When powering back
  * up after power-saving sleeps (or during initial uCode load), the BSM loads
  * the bootstrap program into the on-board processor, and starts it.
  *
  * The bootstrap program loads (via DMA) instructions and data for a new
  * program from host DRAM locations indicated by the host driver in the
  * BSM_DRAM_* registers.  Once the new program is loaded, it starts
  * automatically.
  *
  * When initializing the NIC, the host driver points the BSM to the
  * "initialize" uCode image.  This uCode sets up some internal data, then
  * notifies host via "initialize alive" that it is complete.
  *
  * The host then replaces the BSM_DRAM_* pointer values to point to the
  * normal runtime uCode instructions and a backup uCode data cache buffer
  * (filled initially with starting data values for the on-board processor),
  * then triggers the "initialize" uCode to load and launch the runtime uCode,
  * which begins normal operation.
  *
  * When doing a power-save shutdown, runtime uCode saves data SRAM into
  * the backup data cache in DRAM before SRAM is powered down.
  *
  * When powering back up, the BSM loads the bootstrap program.  This reloads
  * the runtime uCode instructions and the backup data cache into SRAM,
  * and re-launches the runtime uCode from where it left off.
  */
static int
il3945_load_bsm(struct il_priv *il)
{
        __le32 *image = il->ucode_boot.v_addr;
        u32 len = il->ucode_boot.len;
        dma_addr_t pinst;
        dma_addr_t pdata;
        u32 inst_len;
        u32 data_len;
        int rc;
        int i;
        u32 done;
        u32 reg_offset;

        D_INFO("Begin load bsm\n");

        /* make sure bootstrap program is no larger than BSM's SRAM size */
        if (len > IL39_MAX_BSM_SIZE)
                return -EINVAL;

        /* Tell bootstrap uCode where to find the "Initialize" uCode
         *   in host DRAM ... host DRAM physical address bits 31:0 for 3945.
         * NOTE:  il3945_initialize_alive_start() will replace these values,
         *        after the "initialize" uCode has run, to point to
         *        runtime/protocol instructions and backup data cache. */
        pinst = il->ucode_init.p_addr;
        pdata = il->ucode_init_data.p_addr;
        inst_len = il->ucode_init.len;
        data_len = il->ucode_init_data.len;

        il_wr_prph(il, BSM_DRAM_INST_PTR_REG, pinst);
        il_wr_prph(il, BSM_DRAM_DATA_PTR_REG, pdata);
        il_wr_prph(il, BSM_DRAM_INST_BYTECOUNT_REG, inst_len);
        il_wr_prph(il, BSM_DRAM_DATA_BYTECOUNT_REG, data_len);

        /* Fill BSM memory with bootstrap instructions */
        for (reg_offset = BSM_SRAM_LOWER_BOUND;
             reg_offset < BSM_SRAM_LOWER_BOUND + len;
             reg_offset += sizeof(u32), image++)
                _il_wr_prph(il, reg_offset, le32_to_cpu(*image));

        rc = il3945_verify_bsm(il);
        if (rc)
                return rc;

        /* Tell BSM to copy from BSM SRAM into instruction SRAM, when asked */
        il_wr_prph(il, BSM_WR_MEM_SRC_REG, 0x0);
        il_wr_prph(il, BSM_WR_MEM_DST_REG, IL39_RTC_INST_LOWER_BOUND);
        il_wr_prph(il, BSM_WR_DWCOUNT_REG, len / sizeof(u32));

        /* Load bootstrap code into instruction SRAM now,
         *   to prepare to load "initialize" uCode */
        il_wr_prph(il, BSM_WR_CTRL_REG, BSM_WR_CTRL_REG_BIT_START);

        /* Wait for load of bootstrap uCode to finish */
        for (i = 0; i < 100; i++) {
                done = il_rd_prph(il, BSM_WR_CTRL_REG);
                if (!(done & BSM_WR_CTRL_REG_BIT_START))
                        break;
                udelay(10);
        }
        if (i < 100)
                D_INFO("BSM write complete, poll %d iterations\n", i);
        else {
                IL_ERR("BSM write did not complete!\n");
                return -EIO;
        }

        /* Enable future boot loads whenever power management unit triggers it
         *   (e.g. when powering back up after power-save shutdown) */
        il_wr_prph(il, BSM_WR_CTRL_REG, BSM_WR_CTRL_REG_BIT_START_EN);

        return 0;
}

const struct il_ops il3945_ops = {
        .txq_attach_buf_to_tfd = il3945_hw_txq_attach_buf_to_tfd,
        .txq_free_tfd = il3945_hw_txq_free_tfd,
        .txq_init = il3945_hw_tx_queue_init,
        .load_ucode = il3945_load_bsm,
        .dump_nic_error_log = il3945_dump_nic_error_log,
        .apm_init = il3945_apm_init,
        .send_tx_power = il3945_send_tx_power,
        .is_valid_rtc_data_addr = il3945_hw_valid_rtc_data_addr,
        .eeprom_acquire_semaphore = il3945_eeprom_acquire_semaphore,
        .eeprom_release_semaphore = il3945_eeprom_release_semaphore,

        .rxon_assoc = il3945_send_rxon_assoc,
        .commit_rxon = il3945_commit_rxon,

        .get_hcmd_size = il3945_get_hcmd_size,
        .build_addsta_hcmd = il3945_build_addsta_hcmd,
        .request_scan = il3945_request_scan,
        .post_scan = il3945_post_scan,

        .post_associate = il3945_post_associate,
        .config_ap = il3945_config_ap,
        .manage_ibss_station = il3945_manage_ibss_station,

        .send_led_cmd = il3945_send_led_cmd,
};

static struct il_cfg il3945_bg_cfg = {
        .name = "3945BG",
        .fw_name_pre = IL3945_FW_PRE,
        .ucode_api_max = IL3945_UCODE_API_MAX,
        .ucode_api_min = IL3945_UCODE_API_MIN,
        .sku = IL_SKU_G,
        .eeprom_ver = EEPROM_3945_EEPROM_VERSION,
        .mod_params = &il3945_mod_params,
        .led_mode = IL_LED_BLINK,

        .eeprom_size = IL3945_EEPROM_IMG_SIZE,
        .num_of_queues = IL39_NUM_QUEUES,
        .pll_cfg_val = CSR39_ANA_PLL_CFG_VAL,
        .set_l0s = false,
        .use_bsm = true,
        .led_compensation = 64,
        .wd_timeout = IL_DEF_WD_TIMEOUT,

        .regulatory_bands = {
                EEPROM_REGULATORY_BAND_1_CHANNELS,
                EEPROM_REGULATORY_BAND_2_CHANNELS,
                EEPROM_REGULATORY_BAND_3_CHANNELS,
                EEPROM_REGULATORY_BAND_4_CHANNELS,
                EEPROM_REGULATORY_BAND_5_CHANNELS,
                EEPROM_REGULATORY_BAND_NO_HT40,
                EEPROM_REGULATORY_BAND_NO_HT40,
        },
};

static struct il_cfg il3945_abg_cfg = {
        .name = "3945ABG",
        .fw_name_pre = IL3945_FW_PRE,
        .ucode_api_max = IL3945_UCODE_API_MAX,
        .ucode_api_min = IL3945_UCODE_API_MIN,
        .sku = IL_SKU_A | IL_SKU_G,
        .eeprom_ver = EEPROM_3945_EEPROM_VERSION,
        .mod_params = &il3945_mod_params,
        .led_mode = IL_LED_BLINK,

        .eeprom_size = IL3945_EEPROM_IMG_SIZE,
        .num_of_queues = IL39_NUM_QUEUES,
        .pll_cfg_val = CSR39_ANA_PLL_CFG_VAL,
        .set_l0s = false,
        .use_bsm = true,
        .led_compensation = 64,
        .wd_timeout = IL_DEF_WD_TIMEOUT,

        .regulatory_bands = {
                EEPROM_REGULATORY_BAND_1_CHANNELS,
                EEPROM_REGULATORY_BAND_2_CHANNELS,
                EEPROM_REGULATORY_BAND_3_CHANNELS,
                EEPROM_REGULATORY_BAND_4_CHANNELS,
                EEPROM_REGULATORY_BAND_5_CHANNELS,
                EEPROM_REGULATORY_BAND_NO_HT40,
                EEPROM_REGULATORY_BAND_NO_HT40,
        },
};

DEFINE_PCI_DEVICE_TABLE(il3945_hw_card_ids) = {
        {IL_PCI_DEVICE(0x4222, 0x1005, il3945_bg_cfg)},
        {IL_PCI_DEVICE(0x4222, 0x1034, il3945_bg_cfg)},
        {IL_PCI_DEVICE(0x4222, 0x1044, il3945_bg_cfg)},
        {IL_PCI_DEVICE(0x4227, 0x1014, il3945_bg_cfg)},
        {IL_PCI_DEVICE(0x4222, PCI_ANY_ID, il3945_abg_cfg)},
        {IL_PCI_DEVICE(0x4227, PCI_ANY_ID, il3945_abg_cfg)},
        {0}
};

MODULE_DEVICE_TABLE(pci, il3945_hw_card_ids);