drivers/net/wireless/st/cw1200/main.c - linux - Git at Google

 // 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 = {
 	.start			= cw1200_start,
 	.stop			= cw1200_stop,
 	.add_interface		= cw1200_add_interface,
 	.remove_interface	= cw1200_remove_interface,
 	.change_interface	= cw1200_change_interface,
 	.tx			= cw1200_tx,
 	.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);

 	del_timer_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);
	// 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 = {
	.start = cw1200_start,
	.stop = cw1200_stop,
	.add_interface = cw1200_add_interface,
	.remove_interface = cw1200_remove_interface,
	.change_interface = cw1200_change_interface,
	.tx = cw1200_tx,
	.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);

	del_timer_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);