// SPDX-License-Identifier: GPL-2.0-only
/*
 * mac80211 glue code for mac80211 ST-Ericsson CW1200 drivers
 *
 * Copyright (c) 2010, ST-Ericsson
 * Author: Dmitry Tarnyagin <dmitry.tarnyagin@lockless.no>
 *
 * Based on:
 * Copyright (c) 2006, Michael Wu <flamingice@sourmilk.net>
 * Copyright (c) 2007-2009, Christian Lamparter <chunkeey@web.de>
 * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
 *
 * Based on:
 * - the islsm (softmac prism54) driver, which is:
 *   Copyright 2004-2006 Jean-Baptiste Note <jbnote@gmail.com>, et al.
 * - stlc45xx driver
 *   Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies).
 */

#include <linux/module.h>
#include <linux/firmware.h>
#include <linux/etherdevice.h>
#include <linux/vmalloc.h>
#include <linux/random.h>
#include <linux/sched.h>
#include <net/mac80211.h>

#include "cw1200.h"
#include "txrx.h"
#include "hwbus.h"
#include "fwio.h"
#include "hwio.h"
#include "bh.h"
#include "sta.h"
#include "scan.h"
#include "debug.h"
#include "pm.h"

MODULE_AUTHOR("Dmitry Tarnyagin <dmitry.tarnyagin@lockless.no>");
MODULE_DESCRIPTION("Softmac ST-Ericsson CW1200 common code");
MODULE_LICENSE("GPL");
MODULE_ALIAS("cw1200_core");

/* Accept MAC address of the form macaddr=0x00,0x80,0xE1,0x30,0x40,0x50 */
static u8 cw1200_mac_template[ETH_ALEN] = {0x02, 0x80, 0xe1, 0x00, 0x00, 0x00};
module_param_array_named(macaddr, cw1200_mac_template, byte, NULL, 0444);
MODULE_PARM_DESC(macaddr, "Override platform_data MAC address");

static char *cw1200_sdd_path;
module_param(cw1200_sdd_path, charp, 0644);
MODULE_PARM_DESC(cw1200_sdd_path, "Override platform_data SDD file");
static int cw1200_refclk;
module_param(cw1200_refclk, int, 0644);
MODULE_PARM_DESC(cw1200_refclk, "Override platform_data reference clock");

int cw1200_power_mode = wsm_power_mode_quiescent;
module_param(cw1200_power_mode, int, 0644);
MODULE_PARM_DESC(cw1200_power_mode, "WSM power mode.  0 == active, 1 == doze, 2 == quiescent (default)");

#define RATETAB_ENT(_rate, _rateid, _flags)             \
        {                                               \
                .bitrate        = (_rate),              \
                .hw_value       = (_rateid),            \
                .flags          = (_flags),             \
        }

static struct ieee80211_rate cw1200_rates[] = {
        RATETAB_ENT(10,  0,   0),
        RATETAB_ENT(20,  1,   0),
        RATETAB_ENT(55,  2,   0),
        RATETAB_ENT(110, 3,   0),
        RATETAB_ENT(60,  6,  0),
        RATETAB_ENT(90,  7,  0),
        RATETAB_ENT(120, 8,  0),
        RATETAB_ENT(180, 9,  0),
        RATETAB_ENT(240, 10, 0),
        RATETAB_ENT(360, 11, 0),
        RATETAB_ENT(480, 12, 0),
        RATETAB_ENT(540, 13, 0),
};

static struct ieee80211_rate cw1200_mcs_rates[] = {
        RATETAB_ENT(65,  14, IEEE80211_TX_RC_MCS),
        RATETAB_ENT(130, 15, IEEE80211_TX_RC_MCS),
        RATETAB_ENT(195, 16, IEEE80211_TX_RC_MCS),
        RATETAB_ENT(260, 17, IEEE80211_TX_RC_MCS),
        RATETAB_ENT(390, 18, IEEE80211_TX_RC_MCS),
        RATETAB_ENT(520, 19, IEEE80211_TX_RC_MCS),
        RATETAB_ENT(585, 20, IEEE80211_TX_RC_MCS),
        RATETAB_ENT(650, 21, IEEE80211_TX_RC_MCS),
};

#define cw1200_a_rates          (cw1200_rates + 4)
#define cw1200_a_rates_size     (ARRAY_SIZE(cw1200_rates) - 4)
#define cw1200_g_rates          (cw1200_rates + 0)
#define cw1200_g_rates_size     (ARRAY_SIZE(cw1200_rates))
#define cw1200_n_rates          (cw1200_mcs_rates)
#define cw1200_n_rates_size     (ARRAY_SIZE(cw1200_mcs_rates))


#define CHAN2G(_channel, _freq, _flags) {                       \
        .band                   = NL80211_BAND_2GHZ,            \
        .center_freq            = (_freq),                      \
        .hw_value               = (_channel),                   \
        .flags                  = (_flags),                     \
        .max_antenna_gain       = 0,                            \
        .max_power              = 30,                           \
}

#define CHAN5G(_channel, _flags) {                              \
        .band                   = NL80211_BAND_5GHZ,            \
        .center_freq    = 5000 + (5 * (_channel)),              \
        .hw_value               = (_channel),                   \
        .flags                  = (_flags),                     \
        .max_antenna_gain       = 0,                            \
        .max_power              = 30,                           \
}

static struct ieee80211_channel cw1200_2ghz_chantable[] = {
        CHAN2G(1, 2412, 0),
        CHAN2G(2, 2417, 0),
        CHAN2G(3, 2422, 0),
        CHAN2G(4, 2427, 0),
        CHAN2G(5, 2432, 0),
        CHAN2G(6, 2437, 0),
        CHAN2G(7, 2442, 0),
        CHAN2G(8, 2447, 0),
        CHAN2G(9, 2452, 0),
        CHAN2G(10, 2457, 0),
        CHAN2G(11, 2462, 0),
        CHAN2G(12, 2467, 0),
        CHAN2G(13, 2472, 0),
        CHAN2G(14, 2484, 0),
};

static struct ieee80211_channel cw1200_5ghz_chantable[] = {
        CHAN5G(34, 0),          CHAN5G(36, 0),
        CHAN5G(38, 0),          CHAN5G(40, 0),
        CHAN5G(42, 0),          CHAN5G(44, 0),
        CHAN5G(46, 0),          CHAN5G(48, 0),
        CHAN5G(52, 0),          CHAN5G(56, 0),
        CHAN5G(60, 0),          CHAN5G(64, 0),
        CHAN5G(100, 0),         CHAN5G(104, 0),
        CHAN5G(108, 0),         CHAN5G(112, 0),
        CHAN5G(116, 0),         CHAN5G(120, 0),
        CHAN5G(124, 0),         CHAN5G(128, 0),
        CHAN5G(132, 0),         CHAN5G(136, 0),
        CHAN5G(140, 0),         CHAN5G(149, 0),
        CHAN5G(153, 0),         CHAN5G(157, 0),
        CHAN5G(161, 0),         CHAN5G(165, 0),
        CHAN5G(184, 0),         CHAN5G(188, 0),
        CHAN5G(192, 0),         CHAN5G(196, 0),
        CHAN5G(200, 0),         CHAN5G(204, 0),
        CHAN5G(208, 0),         CHAN5G(212, 0),
        CHAN5G(216, 0),
};

static struct ieee80211_supported_band cw1200_band_2ghz = {
        .channels = cw1200_2ghz_chantable,
        .n_channels = ARRAY_SIZE(cw1200_2ghz_chantable),
        .bitrates = cw1200_g_rates,
        .n_bitrates = cw1200_g_rates_size,
        .ht_cap = {
                .cap = IEEE80211_HT_CAP_GRN_FLD |
                        (1 << IEEE80211_HT_CAP_RX_STBC_SHIFT) |
                        IEEE80211_HT_CAP_MAX_AMSDU,
                .ht_supported = 1,
                .ampdu_factor = IEEE80211_HT_MAX_AMPDU_8K,
                .ampdu_density = IEEE80211_HT_MPDU_DENSITY_NONE,
                .mcs = {
                        .rx_mask[0] = 0xFF,
                        .rx_highest = __cpu_to_le16(0x41),
                        .tx_params = IEEE80211_HT_MCS_TX_DEFINED,
                },
        },
};

static struct ieee80211_supported_band cw1200_band_5ghz = {
        .channels = cw1200_5ghz_chantable,
        .n_channels = ARRAY_SIZE(cw1200_5ghz_chantable),
        .bitrates = cw1200_a_rates,
        .n_bitrates = cw1200_a_rates_size,
        .ht_cap = {
                .cap = IEEE80211_HT_CAP_GRN_FLD |
                        (1 << IEEE80211_HT_CAP_RX_STBC_SHIFT) |
                        IEEE80211_HT_CAP_MAX_AMSDU,
                .ht_supported = 1,
                .ampdu_factor = IEEE80211_HT_MAX_AMPDU_8K,
                .ampdu_density = IEEE80211_HT_MPDU_DENSITY_NONE,
                .mcs = {
                        .rx_mask[0] = 0xFF,
                        .rx_highest = __cpu_to_le16(0x41),
                        .tx_params = IEEE80211_HT_MCS_TX_DEFINED,
                },
        },
};

static const unsigned long cw1200_ttl[] = {
        1 * HZ, /* VO */
        2 * HZ, /* VI */
        5 * HZ, /* BE */
        10 * HZ /* BK */
};

static const struct ieee80211_ops cw1200_ops = {
        .add_chanctx = ieee80211_emulate_add_chanctx,
        .remove_chanctx = ieee80211_emulate_remove_chanctx,
        .change_chanctx = ieee80211_emulate_change_chanctx,
        .switch_vif_chanctx = ieee80211_emulate_switch_vif_chanctx,
        .start                  = cw1200_start,
        .stop                   = cw1200_stop,
        .add_interface          = cw1200_add_interface,
        .remove_interface       = cw1200_remove_interface,
        .change_interface       = cw1200_change_interface,
        .tx                     = cw1200_tx,
        .wake_tx_queue          = ieee80211_handle_wake_tx_queue,
        .hw_scan                = cw1200_hw_scan,
        .set_tim                = cw1200_set_tim,
        .sta_notify             = cw1200_sta_notify,
        .sta_add                = cw1200_sta_add,
        .sta_remove             = cw1200_sta_remove,
        .set_key                = cw1200_set_key,
        .set_rts_threshold      = cw1200_set_rts_threshold,
        .config                 = cw1200_config,
        .bss_info_changed       = cw1200_bss_info_changed,
        .prepare_multicast      = cw1200_prepare_multicast,
        .configure_filter       = cw1200_configure_filter,
        .conf_tx                = cw1200_conf_tx,
        .get_stats              = cw1200_get_stats,
        .ampdu_action           = cw1200_ampdu_action,
        .flush                  = cw1200_flush,
#ifdef CONFIG_PM
        .suspend                = cw1200_wow_suspend,
        .resume                 = cw1200_wow_resume,
#endif
        /* Intentionally not offloaded:                                 */
        /*.channel_switch       = cw1200_channel_switch,                */
        /*.remain_on_channel    = cw1200_remain_on_channel,             */
        /*.cancel_remain_on_channel = cw1200_cancel_remain_on_channel,  */
};

static int cw1200_ba_rx_tids = -1;
static int cw1200_ba_tx_tids = -1;
module_param(cw1200_ba_rx_tids, int, 0644);
module_param(cw1200_ba_tx_tids, int, 0644);
MODULE_PARM_DESC(cw1200_ba_rx_tids, "Block ACK RX TIDs");
MODULE_PARM_DESC(cw1200_ba_tx_tids, "Block ACK TX TIDs");

#ifdef CONFIG_PM
static const struct wiphy_wowlan_support cw1200_wowlan_support = {
        /* Support only for limited wowlan functionalities */
        .flags = WIPHY_WOWLAN_ANY | WIPHY_WOWLAN_DISCONNECT,
};
#endif


static struct ieee80211_hw *cw1200_init_common(const u8 *macaddr,
                                                const bool have_5ghz)
{
        int i, band;
        struct ieee80211_hw *hw;
        struct cw1200_common *priv;

        hw = ieee80211_alloc_hw(sizeof(struct cw1200_common), &cw1200_ops);
        if (!hw)
                return NULL;

        priv = hw->priv;
        priv->hw = hw;
        priv->hw_type = -1;
        priv->mode = NL80211_IFTYPE_UNSPECIFIED;
        priv->rates = cw1200_rates; /* TODO: fetch from FW */
        priv->mcs_rates = cw1200_n_rates;
        if (cw1200_ba_rx_tids != -1)
                priv->ba_rx_tid_mask = cw1200_ba_rx_tids;
        else
                priv->ba_rx_tid_mask = 0xFF; /* Enable RX BLKACK for all TIDs */
        if (cw1200_ba_tx_tids != -1)
                priv->ba_tx_tid_mask = cw1200_ba_tx_tids;
        else
                priv->ba_tx_tid_mask = 0xff; /* Enable TX BLKACK for all TIDs */

        ieee80211_hw_set(hw, NEED_DTIM_BEFORE_ASSOC);
        ieee80211_hw_set(hw, TX_AMPDU_SETUP_IN_HW);
        ieee80211_hw_set(hw, AMPDU_AGGREGATION);
        ieee80211_hw_set(hw, CONNECTION_MONITOR);
        ieee80211_hw_set(hw, REPORTS_TX_ACK_STATUS);
        ieee80211_hw_set(hw, SUPPORTS_DYNAMIC_PS);
        ieee80211_hw_set(hw, SIGNAL_DBM);
        ieee80211_hw_set(hw, SUPPORTS_PS);

        hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
                                          BIT(NL80211_IFTYPE_ADHOC) |
                                          BIT(NL80211_IFTYPE_AP) |
                                          BIT(NL80211_IFTYPE_MESH_POINT) |
                                          BIT(NL80211_IFTYPE_P2P_CLIENT) |
                                          BIT(NL80211_IFTYPE_P2P_GO);

#ifdef CONFIG_PM
        hw->wiphy->wowlan = &cw1200_wowlan_support;
#endif

        hw->wiphy->flags |= WIPHY_FLAG_AP_UAPSD;

        hw->queues = 4;

        priv->rts_threshold = -1;

        hw->max_rates = 8;
        hw->max_rate_tries = 15;
        hw->extra_tx_headroom = WSM_TX_EXTRA_HEADROOM +
                8;  /* TKIP IV */

        hw->sta_data_size = sizeof(struct cw1200_sta_priv);

        hw->wiphy->bands[NL80211_BAND_2GHZ] = &cw1200_band_2ghz;
        if (have_5ghz)
                hw->wiphy->bands[NL80211_BAND_5GHZ] = &cw1200_band_5ghz;

        /* Channel params have to be cleared before registering wiphy again */
        for (band = 0; band < NUM_NL80211_BANDS; band++) {
                struct ieee80211_supported_band *sband = hw->wiphy->bands[band];
                if (!sband)
                        continue;
                for (i = 0; i < sband->n_channels; i++) {
                        sband->channels[i].flags = 0;
                        sband->channels[i].max_antenna_gain = 0;
                        sband->channels[i].max_power = 30;
                }
        }

        hw->wiphy->max_scan_ssids = 2;
        hw->wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;

        if (macaddr)
                SET_IEEE80211_PERM_ADDR(hw, (u8 *)macaddr);
        else
                SET_IEEE80211_PERM_ADDR(hw, cw1200_mac_template);

        /* Fix up mac address if necessary */
        if (hw->wiphy->perm_addr[3] == 0 &&
            hw->wiphy->perm_addr[4] == 0 &&
            hw->wiphy->perm_addr[5] == 0) {
                get_random_bytes(&hw->wiphy->perm_addr[3], 3);
        }

        mutex_init(&priv->wsm_cmd_mux);
        mutex_init(&priv->conf_mutex);
        priv->workqueue = create_singlethread_workqueue("cw1200_wq");
        if (!priv->workqueue) {
                ieee80211_free_hw(hw);
                return NULL;
        }

        sema_init(&priv->scan.lock, 1);
        INIT_WORK(&priv->scan.work, cw1200_scan_work);
        INIT_DELAYED_WORK(&priv->scan.probe_work, cw1200_probe_work);
        INIT_DELAYED_WORK(&priv->scan.timeout, cw1200_scan_timeout);
        INIT_DELAYED_WORK(&priv->clear_recent_scan_work,
                          cw1200_clear_recent_scan_work);
        INIT_DELAYED_WORK(&priv->join_timeout, cw1200_join_timeout);
        INIT_WORK(&priv->unjoin_work, cw1200_unjoin_work);
        INIT_WORK(&priv->join_complete_work, cw1200_join_complete_work);
        INIT_WORK(&priv->wep_key_work, cw1200_wep_key_work);
        INIT_WORK(&priv->tx_policy_upload_work, tx_policy_upload_work);
        spin_lock_init(&priv->event_queue_lock);
        INIT_LIST_HEAD(&priv->event_queue);
        INIT_WORK(&priv->event_handler, cw1200_event_handler);
        INIT_DELAYED_WORK(&priv->bss_loss_work, cw1200_bss_loss_work);
        INIT_WORK(&priv->bss_params_work, cw1200_bss_params_work);
        spin_lock_init(&priv->bss_loss_lock);
        spin_lock_init(&priv->ps_state_lock);
        INIT_WORK(&priv->set_cts_work, cw1200_set_cts_work);
        INIT_WORK(&priv->set_tim_work, cw1200_set_tim_work);
        INIT_WORK(&priv->multicast_start_work, cw1200_multicast_start_work);
        INIT_WORK(&priv->multicast_stop_work, cw1200_multicast_stop_work);
        INIT_WORK(&priv->link_id_work, cw1200_link_id_work);
        INIT_DELAYED_WORK(&priv->link_id_gc_work, cw1200_link_id_gc_work);
        INIT_WORK(&priv->linkid_reset_work, cw1200_link_id_reset);
        INIT_WORK(&priv->update_filtering_work, cw1200_update_filtering_work);
        INIT_WORK(&priv->set_beacon_wakeup_period_work,
                  cw1200_set_beacon_wakeup_period_work);
        timer_setup(&priv->mcast_timeout, cw1200_mcast_timeout, 0);

        if (cw1200_queue_stats_init(&priv->tx_queue_stats,
                                    CW1200_LINK_ID_MAX,
                                    cw1200_skb_dtor,
                                    priv)) {
                destroy_workqueue(priv->workqueue);
                ieee80211_free_hw(hw);
                return NULL;
        }

        for (i = 0; i < 4; ++i) {
                if (cw1200_queue_init(&priv->tx_queue[i],
                                      &priv->tx_queue_stats, i, 16,
                                      cw1200_ttl[i])) {
                        for (; i > 0; i--)
                                cw1200_queue_deinit(&priv->tx_queue[i - 1]);
                        cw1200_queue_stats_deinit(&priv->tx_queue_stats);
                        destroy_workqueue(priv->workqueue);
                        ieee80211_free_hw(hw);
                        return NULL;
                }
        }

        init_waitqueue_head(&priv->channel_switch_done);
        init_waitqueue_head(&priv->wsm_cmd_wq);
        init_waitqueue_head(&priv->wsm_startup_done);
        init_waitqueue_head(&priv->ps_mode_switch_done);
        wsm_buf_init(&priv->wsm_cmd_buf);
        spin_lock_init(&priv->wsm_cmd.lock);
        priv->wsm_cmd.done = 1;
        tx_policy_init(priv);

        return hw;
}

static int cw1200_register_common(struct ieee80211_hw *dev)
{
        struct cw1200_common *priv = dev->priv;
        int err;

#ifdef CONFIG_PM
        err = cw1200_pm_init(&priv->pm_state, priv);
        if (err) {
                pr_err("Cannot init PM. (%d).\n",
                       err);
                return err;
        }
#endif

        err = ieee80211_register_hw(dev);
        if (err) {
                pr_err("Cannot register device (%d).\n",
                       err);
#ifdef CONFIG_PM
                cw1200_pm_deinit(&priv->pm_state);
#endif
                return err;
        }

        cw1200_debug_init(priv);

        pr_info("Registered as '%s'\n", wiphy_name(dev->wiphy));
        return 0;
}

static void cw1200_free_common(struct ieee80211_hw *dev)
{
        ieee80211_free_hw(dev);
}

static void cw1200_unregister_common(struct ieee80211_hw *dev)
{
        struct cw1200_common *priv = dev->priv;
        int i;

        ieee80211_unregister_hw(dev);

        timer_delete_sync(&priv->mcast_timeout);
        cw1200_unregister_bh(priv);

        cw1200_debug_release(priv);

        mutex_destroy(&priv->conf_mutex);

        wsm_buf_deinit(&priv->wsm_cmd_buf);

        destroy_workqueue(priv->workqueue);
        priv->workqueue = NULL;

        if (priv->sdd) {
                release_firmware(priv->sdd);
                priv->sdd = NULL;
        }

        for (i = 0; i < 4; ++i)
                cw1200_queue_deinit(&priv->tx_queue[i]);

        cw1200_queue_stats_deinit(&priv->tx_queue_stats);
#ifdef CONFIG_PM
        cw1200_pm_deinit(&priv->pm_state);
#endif
}

/* Clock is in KHz */
u32 cw1200_dpll_from_clk(u16 clk_khz)
{
        switch (clk_khz) {
        case 0x32C8: /* 13000 KHz */
                return 0x1D89D241;
        case 0x3E80: /* 16000 KHz */
                return 0x000001E1;
        case 0x41A0: /* 16800 KHz */
                return 0x124931C1;
        case 0x4B00: /* 19200 KHz */
                return 0x00000191;
        case 0x5DC0: /* 24000 KHz */
                return 0x00000141;
        case 0x6590: /* 26000 KHz */
                return 0x0EC4F121;
        case 0x8340: /* 33600 KHz */
                return 0x092490E1;
        case 0x9600: /* 38400 KHz */
                return 0x100010C1;
        case 0x9C40: /* 40000 KHz */
                return 0x000000C1;
        case 0xBB80: /* 48000 KHz */
                return 0x000000A1;
        case 0xCB20: /* 52000 KHz */
                return 0x07627091;
        default:
                pr_err("Unknown Refclk freq (0x%04x), using 26000KHz\n",
                       clk_khz);
                return 0x0EC4F121;
        }
}

int cw1200_core_probe(const struct hwbus_ops *hwbus_ops,
                      struct hwbus_priv *hwbus,
                      struct device *pdev,
                      struct cw1200_common **core,
                      int ref_clk, const u8 *macaddr,
                      const char *sdd_path, bool have_5ghz)
{
        int err = -EINVAL;
        struct ieee80211_hw *dev;
        struct cw1200_common *priv;
        struct wsm_operational_mode mode = {
                .power_mode = cw1200_power_mode,
                .disable_more_flag_usage = true,
        };

        dev = cw1200_init_common(macaddr, have_5ghz);
        if (!dev)
                goto err;

        priv = dev->priv;
        priv->hw_refclk = ref_clk;
        if (cw1200_refclk)
                priv->hw_refclk = cw1200_refclk;

        priv->sdd_path = (char *)sdd_path;
        if (cw1200_sdd_path)
                priv->sdd_path = cw1200_sdd_path;

        priv->hwbus_ops = hwbus_ops;
        priv->hwbus_priv = hwbus;
        priv->pdev = pdev;
        SET_IEEE80211_DEV(priv->hw, pdev);

        /* Pass struct cw1200_common back up */
        *core = priv;

        err = cw1200_register_bh(priv);
        if (err)
                goto err1;

        err = cw1200_load_firmware(priv);
        if (err)
                goto err2;

        if (wait_event_interruptible_timeout(priv->wsm_startup_done,
                                             priv->firmware_ready,
                                             3*HZ) <= 0) {
                /* TODO: Need to find how to reset device
                   in QUEUE mode properly.
                */
                pr_err("Timeout waiting on device startup\n");
                err = -ETIMEDOUT;
                goto err2;
        }

        /* Set low-power mode. */
        wsm_set_operational_mode(priv, &mode);

        /* Enable multi-TX confirmation */
        wsm_use_multi_tx_conf(priv, true);

        err = cw1200_register_common(dev);
        if (err)
                goto err2;

        return err;

err2:
        cw1200_unregister_bh(priv);
err1:
        cw1200_free_common(dev);
err:
        *core = NULL;
        return err;
}
EXPORT_SYMBOL_GPL(cw1200_core_probe);

void cw1200_core_release(struct cw1200_common *self)
{
        /* Disable device interrupts */
        self->hwbus_ops->lock(self->hwbus_priv);
        __cw1200_irq_enable(self, 0);
        self->hwbus_ops->unlock(self->hwbus_priv);

        /* And then clean up */
        cw1200_unregister_common(self->hw);
        cw1200_free_common(self->hw);
        return;
}
EXPORT_SYMBOL_GPL(cw1200_core_release);