drivers/net/wireless/iwmc3200wifi/main.c - kernel/msm-4.19 - Gitiles

 /*
  * Intel Wireless Multicomm 3200 WiFi driver
  *
  * Copyright (C) 2009 Intel Corporation. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  *   * Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  *   * Redistributions in binary form must reproduce the above copyright
  *     notice, this list of conditions and the following disclaimer in
  *     the documentation and/or other materials provided with the
  *     distribution.
  *   * Neither the name of Intel Corporation nor the names of its
  *     contributors may be used to endorse or promote products derived
  *     from this software without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
  *
  * Intel Corporation <ilw@linux.intel.com>
  * Samuel Ortiz <samuel.ortiz@intel.com>
  * Zhu Yi <yi.zhu@intel.com>
  *
  */

 #include <linux/kernel.h>
 #include <linux/netdevice.h>
 #include <linux/sched.h>
 #include <linux/ieee80211.h>
 #include <linux/wireless.h>
 #include <linux/slab.h>
 #include <linux/moduleparam.h>

 #include "iwm.h"
 #include "debug.h"
 #include "bus.h"
 #include "umac.h"
 #include "commands.h"
 #include "hal.h"
 #include "fw.h"
 #include "rx.h"

 static struct iwm_conf def_iwm_conf = {

 	.sdio_ior_timeout	= 5000,
 	.calib_map		= BIT(CALIB_CFG_DC_IDX)	|
 				  BIT(CALIB_CFG_LO_IDX)	|
 				  BIT(CALIB_CFG_TX_IQ_IDX)	|
 				  BIT(CALIB_CFG_RX_IQ_IDX)	|
 				  BIT(SHILOH_PHY_CALIBRATE_BASE_BAND_CMD),
 	.expected_calib_map	= BIT(PHY_CALIBRATE_DC_CMD)	|
 				  BIT(PHY_CALIBRATE_LO_CMD)	|
 				  BIT(PHY_CALIBRATE_TX_IQ_CMD)	|
 				  BIT(PHY_CALIBRATE_RX_IQ_CMD)	|
 				  BIT(SHILOH_PHY_CALIBRATE_BASE_BAND_CMD),
 	.ct_kill_entry		= 110,
 	.ct_kill_exit		= 110,
 	.reset_on_fatal_err	= 1,
 	.auto_connect		= 1,
 	.enable_qos		= 1,
 	.mode			= UMAC_MODE_BSS,

 	/* UMAC configuration */
 	.power_index		= 0,
 	.frag_threshold		= IEEE80211_MAX_FRAG_THRESHOLD,
 	.rts_threshold		= IEEE80211_MAX_RTS_THRESHOLD,
 	.cts_to_self		= 0,

 	.assoc_timeout		= 2,
 	.roam_timeout		= 10,
 	.wireless_mode		= WIRELESS_MODE_11A | WIRELESS_MODE_11G |
 				  WIRELESS_MODE_11N,

 	/* IBSS */
 	.ibss_band		= UMAC_BAND_2GHZ,
 	.ibss_channel		= 1,

 	.mac_addr		= {0x00, 0x02, 0xb3, 0x01, 0x02, 0x03},
 };

 static bool modparam_reset;
 module_param_named(reset, modparam_reset, bool, 0644);
 MODULE_PARM_DESC(reset, "reset on firmware errors (default 0 [not reset])");

 static bool modparam_wimax_enable = true;
 module_param_named(wimax_enable, modparam_wimax_enable, bool, 0644);
 MODULE_PARM_DESC(wimax_enable, "Enable wimax core (default 1 [wimax enabled])");

 int iwm_mode_to_nl80211_iftype(int mode)
 {
 	switch (mode) {
 	case UMAC_MODE_BSS:
 		return NL80211_IFTYPE_STATION;
 	case UMAC_MODE_IBSS:
 		return NL80211_IFTYPE_ADHOC;
 	default:
 		return NL80211_IFTYPE_UNSPECIFIED;
 	}

 	return 0;
 }

 static void iwm_statistics_request(struct work_struct *work)
 {
 	struct iwm_priv *iwm =
 		container_of(work, struct iwm_priv, stats_request.work);

 	iwm_send_umac_stats_req(iwm, 0);
 }

 static void iwm_disconnect_work(struct work_struct *work)
 {
 	struct iwm_priv *iwm =
 		container_of(work, struct iwm_priv, disconnect.work);

 	if (iwm->umac_profile_active)
 		iwm_invalidate_mlme_profile(iwm);

 	clear_bit(IWM_STATUS_ASSOCIATED, &iwm->status);
 	iwm->umac_profile_active = false;
 	memset(iwm->bssid, 0, ETH_ALEN);
 	iwm->channel = 0;

 	iwm_link_off(iwm);

 	wake_up_interruptible(&iwm->mlme_queue);

 	cfg80211_disconnected(iwm_to_ndev(iwm), 0, NULL, 0, GFP_KERNEL);
 }

 static void iwm_ct_kill_work(struct work_struct *work)
 {
 	struct iwm_priv *iwm =
 		container_of(work, struct iwm_priv, ct_kill_delay.work);
 	struct wiphy *wiphy = iwm_to_wiphy(iwm);

 	IWM_INFO(iwm, "CT kill delay timeout\n");

 	wiphy_rfkill_set_hw_state(wiphy, false);
 }

 static int __iwm_up(struct iwm_priv *iwm);
 static int __iwm_down(struct iwm_priv *iwm);

 static void iwm_reset_worker(struct work_struct *work)
 {
 	struct iwm_priv *iwm;
 	struct iwm_umac_profile *profile = NULL;
 	int uninitialized_var(ret), retry = 0;

 	iwm = container_of(work, struct iwm_priv, reset_worker);

 	/*
 	 * XXX: The iwm->mutex is introduced purely for this reset work,
 	 * because the other users for iwm_up and iwm_down are only netdev
 	 * ndo_open and ndo_stop which are already protected by rtnl.
 	 * Please remove iwm->mutex together if iwm_reset_worker() is not
 	 * required in the future.
 	 */
 	if (!mutex_trylock(&iwm->mutex)) {
 		IWM_WARN(iwm, "We are in the middle of interface bringing "
 			 "UP/DOWN. Skip driver resetting.\n");
 		return;
 	}

 	if (iwm->umac_profile_active) {
 		profile = kmalloc(sizeof(struct iwm_umac_profile), GFP_KERNEL);
 		if (profile)
 			memcpy(profile, iwm->umac_profile, sizeof(*profile));
 		else
 			IWM_ERR(iwm, "Couldn't alloc memory for profile\n");
 	}

 	__iwm_down(iwm);

 	while (retry++ < 3) {
 		ret = __iwm_up(iwm);
 		if (!ret)
 			break;

 		schedule_timeout_uninterruptible(10 * HZ);
 	}

 	if (ret) {
 		IWM_WARN(iwm, "iwm_up() failed: %d\n", ret);

 		kfree(profile);
 		goto out;
 	}

 	if (profile) {
 		IWM_DBG_MLME(iwm, DBG, "Resend UMAC profile\n");
 		memcpy(iwm->umac_profile, profile, sizeof(*profile));
 		iwm_send_mlme_profile(iwm);
 		kfree(profile);
 	} else
 		clear_bit(IWM_STATUS_RESETTING, &iwm->status);

  out:
 	mutex_unlock(&iwm->mutex);
 }

 static void iwm_auth_retry_worker(struct work_struct *work)
 {
 	struct iwm_priv *iwm;
 	int i, ret;

 	iwm = container_of(work, struct iwm_priv, auth_retry_worker);
 	if (iwm->umac_profile_active) {
 		ret = iwm_invalidate_mlme_profile(iwm);
 		if (ret < 0)
 			return;
 	}

 	iwm->umac_profile->sec.auth_type = UMAC_AUTH_TYPE_LEGACY_PSK;

 	ret = iwm_send_mlme_profile(iwm);
 	if (ret < 0)
 		return;

 	for (i = 0; i < IWM_NUM_KEYS; i++)
 		if (iwm->keys[i].key_len)
 			iwm_set_key(iwm, 0, &iwm->keys[i]);

 	iwm_set_tx_key(iwm, iwm->default_key);
 }


 static void iwm_watchdog(unsigned long data)
 {
 	struct iwm_priv *iwm = (struct iwm_priv *)data;

 	IWM_WARN(iwm, "Watchdog expired: UMAC stalls!\n");

 	if (modparam_reset)
 		iwm_resetting(iwm);
 }

 int iwm_priv_init(struct iwm_priv *iwm)
 {
 	int i, j;
 	char name[32];

 	iwm->status = 0;
 	INIT_LIST_HEAD(&iwm->pending_notif);
 	init_waitqueue_head(&iwm->notif_queue);
 	init_waitqueue_head(&iwm->nonwifi_queue);
 	init_waitqueue_head(&iwm->wifi_ntfy_queue);
 	init_waitqueue_head(&iwm->mlme_queue);
 	memcpy(&iwm->conf, &def_iwm_conf, sizeof(struct iwm_conf));
 	spin_lock_init(&iwm->tx_credit.lock);
 	INIT_LIST_HEAD(&iwm->wifi_pending_cmd);
 	INIT_LIST_HEAD(&iwm->nonwifi_pending_cmd);
 	iwm->wifi_seq_num = UMAC_WIFI_SEQ_NUM_BASE;
 	iwm->nonwifi_seq_num = UMAC_NONWIFI_SEQ_NUM_BASE;
 	spin_lock_init(&iwm->cmd_lock);
 	iwm->scan_id = 1;
 	INIT_DELAYED_WORK(&iwm->stats_request, iwm_statistics_request);
 	INIT_DELAYED_WORK(&iwm->disconnect, iwm_disconnect_work);
 	INIT_DELAYED_WORK(&iwm->ct_kill_delay, iwm_ct_kill_work);
 	INIT_WORK(&iwm->reset_worker, iwm_reset_worker);
 	INIT_WORK(&iwm->auth_retry_worker, iwm_auth_retry_worker);
 	INIT_LIST_HEAD(&iwm->bss_list);

 	skb_queue_head_init(&iwm->rx_list);
 	INIT_LIST_HEAD(&iwm->rx_tickets);
 	spin_lock_init(&iwm->ticket_lock);
 	for (i = 0; i < IWM_RX_ID_HASH; i++) {
 		INIT_LIST_HEAD(&iwm->rx_packets[i]);
 		spin_lock_init(&iwm->packet_lock[i]);
 	}

 	INIT_WORK(&iwm->rx_worker, iwm_rx_worker);

 	iwm->rx_wq = create_singlethread_workqueue(KBUILD_MODNAME "_rx");
 	if (!iwm->rx_wq)
 		return -EAGAIN;

 	for (i = 0; i < IWM_TX_QUEUES; i++) {
 		INIT_WORK(&iwm->txq[i].worker, iwm_tx_worker);
 		snprintf(name, 32, KBUILD_MODNAME "_tx_%d", i);
 		iwm->txq[i].id = i;
 		iwm->txq[i].wq = create_singlethread_workqueue(name);
 		if (!iwm->txq[i].wq)
 			return -EAGAIN;

 		skb_queue_head_init(&iwm->txq[i].queue);
 		skb_queue_head_init(&iwm->txq[i].stopped_queue);
 		spin_lock_init(&iwm->txq[i].lock);
 	}

 	for (i = 0; i < IWM_NUM_KEYS; i++)
 		memset(&iwm->keys[i], 0, sizeof(struct iwm_key));

 	iwm->default_key = -1;

 	for (i = 0; i < IWM_STA_TABLE_NUM; i++)
 		for (j = 0; j < IWM_UMAC_TID_NR; j++) {
 			mutex_init(&iwm->sta_table[i].tid_info[j].mutex);
 			iwm->sta_table[i].tid_info[j].stopped = false;
 		}

 	init_timer(&iwm->watchdog);
 	iwm->watchdog.function = iwm_watchdog;
 	iwm->watchdog.data = (unsigned long)iwm;
 	mutex_init(&iwm->mutex);

 	iwm->last_fw_err = kzalloc(sizeof(struct iwm_fw_error_hdr),
 				   GFP_KERNEL);
 	if (iwm->last_fw_err == NULL)
 		return -ENOMEM;

 	return 0;
 }

 void iwm_priv_deinit(struct iwm_priv *iwm)
 {
 	int i;

 	for (i = 0; i < IWM_TX_QUEUES; i++)
 		destroy_workqueue(iwm->txq[i].wq);

 	destroy_workqueue(iwm->rx_wq);
 	kfree(iwm->last_fw_err);
 }

 /*
  * We reset all the structures, and we reset the UMAC.
  * After calling this routine, you're expected to reload
  * the firmware.
  */
 void iwm_reset(struct iwm_priv *iwm)
 {
 	struct iwm_notif *notif, *next;

 	if (test_bit(IWM_STATUS_READY, &iwm->status))
 		iwm_target_reset(iwm);

 	if (test_bit(IWM_STATUS_RESETTING, &iwm->status)) {
 		iwm->status = 0;
 		set_bit(IWM_STATUS_RESETTING, &iwm->status);
 	} else
 		iwm->status = 0;
 	iwm->scan_id = 1;

 	list_for_each_entry_safe(notif, next, &iwm->pending_notif, pending) {
 		list_del(&notif->pending);
 		kfree(notif->buf);
 		kfree(notif);
 	}

 	iwm_cmd_flush(iwm);

 	flush_workqueue(iwm->rx_wq);

 	iwm_link_off(iwm);
 }

 void iwm_resetting(struct iwm_priv *iwm)
 {
 	set_bit(IWM_STATUS_RESETTING, &iwm->status);

 	schedule_work(&iwm->reset_worker);
 }

 /*
  * Notification code:
  *
  * We're faced with the following issue: Any host command can
  * have an answer or not, and if there's an answer to expect,
  * it can be treated synchronously or asynchronously.
  * To work around the synchronous answer case, we implemented
  * our notification mechanism.
  * When a code path needs to wait for a command response
  * synchronously, it calls notif_handle(), which waits for the
  * right notification to show up, and then process it. Before
  * starting to wait, it registered as a waiter for this specific
  * answer (by toggling a bit in on of the handler_map), so that
  * the rx code knows that it needs to send a notification to the
  * waiting processes. It does so by calling iwm_notif_send(),
  * which adds the notification to the pending notifications list,
  * and then wakes the waiting processes up.
  */
 int iwm_notif_send(struct iwm_priv *iwm, struct iwm_wifi_cmd *cmd,
 		   u8 cmd_id, u8 source, u8 *buf, unsigned long buf_size)
 {
 	struct iwm_notif *notif;

 	notif = kzalloc(sizeof(struct iwm_notif), GFP_KERNEL);
 	if (!notif) {
 		IWM_ERR(iwm, "Couldn't alloc memory for notification\n");
 		return -ENOMEM;
 	}

 	INIT_LIST_HEAD(&notif->pending);
 	notif->cmd = cmd;
 	notif->cmd_id = cmd_id;
 	notif->src = source;
 	notif->buf = kzalloc(buf_size, GFP_KERNEL);
 	if (!notif->buf) {
 		IWM_ERR(iwm, "Couldn't alloc notification buffer\n");
 		kfree(notif);
 		return -ENOMEM;
 	}
 	notif->buf_size = buf_size;
 	memcpy(notif->buf, buf, buf_size);
 	list_add_tail(&notif->pending, &iwm->pending_notif);

 	wake_up_interruptible(&iwm->notif_queue);

 	return 0;
 }

 static struct iwm_notif *iwm_notif_find(struct iwm_priv *iwm, u32 cmd,
 					u8 source)
 {
 	struct iwm_notif *notif;

 	list_for_each_entry(notif, &iwm->pending_notif, pending) {
 		if ((notif->cmd_id == cmd) && (notif->src == source)) {
 			list_del(&notif->pending);
 			return notif;
 		}
 	}

 	return NULL;
 }

 static struct iwm_notif *iwm_notif_wait(struct iwm_priv *iwm, u32 cmd,
 					u8 source, long timeout)
 {
 	int ret;
 	struct iwm_notif *notif;
 	unsigned long *map = NULL;

 	switch (source) {
 	case IWM_SRC_LMAC:
 		map = &iwm->lmac_handler_map[0];
 		break;
 	case IWM_SRC_UMAC:
 		map = &iwm->umac_handler_map[0];
 		break;
 	case IWM_SRC_UDMA:
 		map = &iwm->udma_handler_map[0];
 		break;
 	}

 	set_bit(cmd, map);

 	ret = wait_event_interruptible_timeout(iwm->notif_queue,
 			 ((notif = iwm_notif_find(iwm, cmd, source)) != NULL),
 					       timeout);
 	clear_bit(cmd, map);

 	if (!ret)
 		return NULL;

 	return notif;
 }

 int iwm_notif_handle(struct iwm_priv *iwm, u32 cmd, u8 source, long timeout)
 {
 	int ret;
 	struct iwm_notif *notif;

 	notif = iwm_notif_wait(iwm, cmd, source, timeout);
 	if (!notif)
 		return -ETIME;

 	ret = iwm_rx_handle_resp(iwm, notif->buf, notif->buf_size, notif->cmd);
 	kfree(notif->buf);
 	kfree(notif);

 	return ret;
 }

 static int iwm_config_boot_params(struct iwm_priv *iwm)
 {
 	struct iwm_udma_nonwifi_cmd target_cmd;
 	int ret;

 	/* check Wimax is off and config debug monitor */
 	if (!modparam_wimax_enable) {
 		u32 data1 = 0x1f;
 		u32 addr1 = 0x606BE258;

 		u32 data2_set = 0x0;
 		u32 data2_clr = 0x1;
 		u32 addr2 = 0x606BE100;

 		u32 data3 = 0x1;
 		u32 addr3 = 0x606BEC00;

 		target_cmd.resp = 0;
 		target_cmd.handle_by_hw = 0;
 		target_cmd.eop = 1;

 		target_cmd.opcode = UMAC_HDI_OUT_OPCODE_WRITE;
 		target_cmd.addr = cpu_to_le32(addr1);
 		target_cmd.op1_sz = cpu_to_le32(sizeof(u32));
 		target_cmd.op2 = 0;

 		ret = iwm_hal_send_target_cmd(iwm, &target_cmd, &data1);
 		if (ret < 0) {
 			IWM_ERR(iwm, "iwm_hal_send_target_cmd failed\n");
 			return ret;
 		}

 		target_cmd.opcode = UMAC_HDI_OUT_OPCODE_READ_MODIFY_WRITE;
 		target_cmd.addr = cpu_to_le32(addr2);
 		target_cmd.op1_sz = cpu_to_le32(data2_set);
 		target_cmd.op2 = cpu_to_le32(data2_clr);

 		ret = iwm_hal_send_target_cmd(iwm, &target_cmd, &data1);
 		if (ret < 0) {
 			IWM_ERR(iwm, "iwm_hal_send_target_cmd failed\n");
 			return ret;
 		}

 		target_cmd.opcode = UMAC_HDI_OUT_OPCODE_WRITE;
 		target_cmd.addr = cpu_to_le32(addr3);
 		target_cmd.op1_sz = cpu_to_le32(sizeof(u32));
 		target_cmd.op2 = 0;

 		ret = iwm_hal_send_target_cmd(iwm, &target_cmd, &data3);
 		if (ret < 0) {
 			IWM_ERR(iwm, "iwm_hal_send_target_cmd failed\n");
 			return ret;
 		}
 	}

 	return 0;
 }

 void iwm_init_default_profile(struct iwm_priv *iwm,
 			      struct iwm_umac_profile *profile)
 {
 	memset(profile, 0, sizeof(struct iwm_umac_profile));

 	profile->sec.auth_type = UMAC_AUTH_TYPE_OPEN;
 	profile->sec.flags = UMAC_SEC_FLG_LEGACY_PROFILE;
 	profile->sec.ucast_cipher = UMAC_CIPHER_TYPE_NONE;
 	profile->sec.mcast_cipher = UMAC_CIPHER_TYPE_NONE;

 	if (iwm->conf.enable_qos)
 		profile->flags |= cpu_to_le16(UMAC_PROFILE_QOS_ALLOWED);

 	profile->wireless_mode = iwm->conf.wireless_mode;
 	profile->mode = cpu_to_le32(iwm->conf.mode);

 	profile->ibss.atim = 0;
 	profile->ibss.beacon_interval = 100;
 	profile->ibss.join_only = 0;
 	profile->ibss.band = iwm->conf.ibss_band;
 	profile->ibss.channel = iwm->conf.ibss_channel;
 }

 void iwm_link_on(struct iwm_priv *iwm)
 {
 	netif_carrier_on(iwm_to_ndev(iwm));
 	netif_tx_wake_all_queues(iwm_to_ndev(iwm));

 	iwm_send_umac_stats_req(iwm, 0);
 }

 void iwm_link_off(struct iwm_priv *iwm)
 {
 	struct iw_statistics *wstats = &iwm->wstats;
 	int i;

 	netif_tx_stop_all_queues(iwm_to_ndev(iwm));
 	netif_carrier_off(iwm_to_ndev(iwm));

 	for (i = 0; i < IWM_TX_QUEUES; i++) {
 		skb_queue_purge(&iwm->txq[i].queue);
 		skb_queue_purge(&iwm->txq[i].stopped_queue);

 		iwm->txq[i].concat_count = 0;
 		iwm->txq[i].concat_ptr = iwm->txq[i].concat_buf;

 		flush_workqueue(iwm->txq[i].wq);
 	}

 	iwm_rx_free(iwm);

 	cancel_delayed_work_sync(&iwm->stats_request);
 	memset(wstats, 0, sizeof(struct iw_statistics));
 	wstats->qual.updated = IW_QUAL_ALL_INVALID;

 	kfree(iwm->req_ie);
 	iwm->req_ie = NULL;
 	iwm->req_ie_len = 0;
 	kfree(iwm->resp_ie);
 	iwm->resp_ie = NULL;
 	iwm->resp_ie_len = 0;

 	del_timer_sync(&iwm->watchdog);
 }

 static void iwm_bss_list_clean(struct iwm_priv *iwm)
 {
 	struct iwm_bss_info *bss, *next;

 	list_for_each_entry_safe(bss, next, &iwm->bss_list, node) {
 		list_del(&bss->node);
 		kfree(bss->bss);
 		kfree(bss);
 	}
 }

 static int iwm_channels_init(struct iwm_priv *iwm)
 {
 	int ret;

 	ret = iwm_send_umac_channel_list(iwm);
 	if (ret) {
 		IWM_ERR(iwm, "Send channel list failed\n");
 		return ret;
 	}

 	ret = iwm_notif_handle(iwm, UMAC_CMD_OPCODE_GET_CHAN_INFO_LIST,
 			       IWM_SRC_UMAC, WAIT_NOTIF_TIMEOUT);
 	if (ret) {
 		IWM_ERR(iwm, "Didn't get a channel list notification\n");
 		return ret;
 	}

 	return 0;
 }

 static int __iwm_up(struct iwm_priv *iwm)
 {
 	int ret;
 	struct iwm_notif *notif_reboot, *notif_ack = NULL;
 	struct wiphy *wiphy = iwm_to_wiphy(iwm);
 	u32 wireless_mode;

 	ret = iwm_bus_enable(iwm);
 	if (ret) {
 		IWM_ERR(iwm, "Couldn't enable function\n");
 		return ret;
 	}

 	iwm_rx_setup_handlers(iwm);

 	/* Wait for initial BARKER_REBOOT from hardware */
 	notif_reboot = iwm_notif_wait(iwm, IWM_BARKER_REBOOT_NOTIFICATION,
 				      IWM_SRC_UDMA, 2 * HZ);
 	if (!notif_reboot) {
 		IWM_ERR(iwm, "Wait for REBOOT_BARKER timeout\n");
 		goto err_disable;
 	}

 	/* We send the barker back */
 	ret = iwm_bus_send_chunk(iwm, notif_reboot->buf, 16);
 	if (ret) {
 		IWM_ERR(iwm, "REBOOT barker response failed\n");
 		kfree(notif_reboot);
 		goto err_disable;
 	}

 	kfree(notif_reboot->buf);
 	kfree(notif_reboot);

 	/* Wait for ACK_BARKER from hardware */
 	notif_ack = iwm_notif_wait(iwm, IWM_ACK_BARKER_NOTIFICATION,
 				   IWM_SRC_UDMA, 2 * HZ);
 	if (!notif_ack) {
 		IWM_ERR(iwm, "Wait for ACK_BARKER timeout\n");
 		goto err_disable;
 	}

 	kfree(notif_ack->buf);
 	kfree(notif_ack);

 	/* We start to config static boot parameters */
 	ret = iwm_config_boot_params(iwm);
 	if (ret) {
 		IWM_ERR(iwm, "Config boot parameters failed\n");
 		goto err_disable;
 	}

 	ret = iwm_read_mac(iwm, iwm_to_ndev(iwm)->dev_addr);
 	if (ret) {
 		IWM_ERR(iwm, "MAC reading failed\n");
 		goto err_disable;
 	}
 	memcpy(iwm_to_ndev(iwm)->perm_addr, iwm_to_ndev(iwm)->dev_addr,
 		ETH_ALEN);

 	/* We can load the FWs */
 	ret = iwm_load_fw(iwm);
 	if (ret) {
 		IWM_ERR(iwm, "FW loading failed\n");
 		goto err_disable;
 	}

 	ret = iwm_eeprom_fat_channels(iwm);
 	if (ret) {
 		IWM_ERR(iwm, "Couldnt read HT channels EEPROM entries\n");
 		goto err_fw;
 	}

 	/*
 	 * Read our SKU capabilities.
 	 * If it's valid, we AND the configured wireless mode with the
 	 * device EEPROM value as the current profile wireless mode.
 	 */
 	wireless_mode = iwm_eeprom_wireless_mode(iwm);
 	if (wireless_mode) {
 		iwm->conf.wireless_mode &= wireless_mode;
 		if (iwm->umac_profile)
 			iwm->umac_profile->wireless_mode =
 					iwm->conf.wireless_mode;
 	} else
 		IWM_ERR(iwm, "Wrong SKU capabilities: 0x%x\n",
 			*((u16 *)iwm_eeprom_access(iwm, IWM_EEPROM_SKU_CAP)));

 	snprintf(wiphy->fw_version, sizeof(wiphy->fw_version), "L%s_U%s",
 		 iwm->lmac_version, iwm->umac_version);

 	/* We configure the UMAC and enable the wifi module */
 	ret = iwm_send_umac_config(iwm,
 			cpu_to_le32(UMAC_RST_CTRL_FLG_WIFI_CORE_EN) |
 			cpu_to_le32(UMAC_RST_CTRL_FLG_WIFI_LINK_EN) |
 			cpu_to_le32(UMAC_RST_CTRL_FLG_WIFI_MLME_EN));
 	if (ret) {
 		IWM_ERR(iwm, "UMAC config failed\n");
 		goto err_fw;
 	}

 	ret = iwm_notif_handle(iwm, UMAC_NOTIFY_OPCODE_WIFI_CORE_STATUS,
 			       IWM_SRC_UMAC, WAIT_NOTIF_TIMEOUT);
 	if (ret) {
 		IWM_ERR(iwm, "Didn't get a wifi core status notification\n");
 		goto err_fw;
 	}

 	if (iwm->core_enabled != (UMAC_NTFY_WIFI_CORE_STATUS_LINK_EN |
 				  UMAC_NTFY_WIFI_CORE_STATUS_MLME_EN)) {
 		IWM_DBG_BOOT(iwm, DBG, "Not all cores enabled:0x%x\n",
 			     iwm->core_enabled);
 		ret = iwm_notif_handle(iwm, UMAC_NOTIFY_OPCODE_WIFI_CORE_STATUS,
 			       IWM_SRC_UMAC, WAIT_NOTIF_TIMEOUT);
 		if (ret) {
 			IWM_ERR(iwm, "Didn't get a core status notification\n");
 			goto err_fw;
 		}

 		if (iwm->core_enabled != (UMAC_NTFY_WIFI_CORE_STATUS_LINK_EN |
 					  UMAC_NTFY_WIFI_CORE_STATUS_MLME_EN)) {
 			IWM_ERR(iwm, "Not all cores enabled: 0x%x\n",
 				iwm->core_enabled);
 			goto err_fw;
 		} else {
 			IWM_INFO(iwm, "All cores enabled\n");
 		}
 	}

 	ret = iwm_channels_init(iwm);
 	if (ret < 0) {
 		IWM_ERR(iwm, "Couldn't init channels\n");
 		goto err_fw;
 	}

 	/* Set the READY bit to indicate interface is brought up successfully */
 	set_bit(IWM_STATUS_READY, &iwm->status);

 	return 0;

  err_fw:
 	iwm_eeprom_exit(iwm);

  err_disable:
 	ret = iwm_bus_disable(iwm);
 	if (ret < 0)
 		IWM_ERR(iwm, "Couldn't disable function\n");

 	return -EIO;
 }

 int iwm_up(struct iwm_priv *iwm)
 {
 	int ret;

 	mutex_lock(&iwm->mutex);
 	ret = __iwm_up(iwm);
 	mutex_unlock(&iwm->mutex);

 	return ret;
 }

 static int __iwm_down(struct iwm_priv *iwm)
 {
 	int ret;

 	/* The interface is already down */
 	if (!test_bit(IWM_STATUS_READY, &iwm->status))
 		return 0;

 	if (iwm->scan_request) {
 		cfg80211_scan_done(iwm->scan_request, true);
 		iwm->scan_request = NULL;
 	}

 	clear_bit(IWM_STATUS_READY, &iwm->status);

 	iwm_eeprom_exit(iwm);
 	iwm_bss_list_clean(iwm);
 	iwm_init_default_profile(iwm, iwm->umac_profile);
 	iwm->umac_profile_active = false;
 	iwm->default_key = -1;
 	iwm->core_enabled = 0;

 	ret = iwm_bus_disable(iwm);
 	if (ret < 0) {
 		IWM_ERR(iwm, "Couldn't disable function\n");
 		return ret;
 	}

 	return 0;
 }

 int iwm_down(struct iwm_priv *iwm)
 {
 	int ret;

 	mutex_lock(&iwm->mutex);
 	ret = __iwm_down(iwm);
 	mutex_unlock(&iwm->mutex);

 	return ret;
 }
	/*
	* Intel Wireless Multicomm 3200 WiFi driver
	*
	* Copyright (C) 2009 Intel Corporation. All rights reserved.
	*
	* Redistribution and use in source and binary forms, with or without
	* modification, are permitted provided that the following conditions
	* are met:
	*
	* * Redistributions of source code must retain the above copyright
	* notice, this list of conditions and the following disclaimer.
	* * Redistributions in binary form must reproduce the above copyright
	* notice, this list of conditions and the following disclaimer in
	* the documentation and/or other materials provided with the
	* distribution.
	* * Neither the name of Intel Corporation nor the names of its
	* contributors may be used to endorse or promote products derived
	* from this software without specific prior written permission.
	*
	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
	* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
	* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	*
	*
	* Intel Corporation <ilw@linux.intel.com>
	* Samuel Ortiz <samuel.ortiz@intel.com>
	* Zhu Yi <yi.zhu@intel.com>
	*
	*/

	#include <linux/kernel.h>
	#include <linux/netdevice.h>
	#include <linux/sched.h>
	#include <linux/ieee80211.h>
	#include <linux/wireless.h>
	#include <linux/slab.h>
	#include <linux/moduleparam.h>

	#include "iwm.h"
	#include "debug.h"
	#include "bus.h"
	#include "umac.h"
	#include "commands.h"
	#include "hal.h"
	#include "fw.h"
	#include "rx.h"

	static struct iwm_conf def_iwm_conf = {

	.sdio_ior_timeout = 5000,
	.calib_map = BIT(CALIB_CFG_DC_IDX) \|
	BIT(CALIB_CFG_LO_IDX) \|
	BIT(CALIB_CFG_TX_IQ_IDX) \|
	BIT(CALIB_CFG_RX_IQ_IDX) \|
	BIT(SHILOH_PHY_CALIBRATE_BASE_BAND_CMD),
	.expected_calib_map = BIT(PHY_CALIBRATE_DC_CMD) \|
	BIT(PHY_CALIBRATE_LO_CMD) \|
	BIT(PHY_CALIBRATE_TX_IQ_CMD) \|
	BIT(PHY_CALIBRATE_RX_IQ_CMD) \|
	BIT(SHILOH_PHY_CALIBRATE_BASE_BAND_CMD),
	.ct_kill_entry = 110,
	.ct_kill_exit = 110,
	.reset_on_fatal_err = 1,
	.auto_connect = 1,
	.enable_qos = 1,
	.mode = UMAC_MODE_BSS,

	/* UMAC configuration */
	.power_index = 0,
	.frag_threshold = IEEE80211_MAX_FRAG_THRESHOLD,
	.rts_threshold = IEEE80211_MAX_RTS_THRESHOLD,
	.cts_to_self = 0,

	.assoc_timeout = 2,
	.roam_timeout = 10,
	.wireless_mode = WIRELESS_MODE_11A \| WIRELESS_MODE_11G \|
	WIRELESS_MODE_11N,

	/* IBSS */
	.ibss_band = UMAC_BAND_2GHZ,
	.ibss_channel = 1,

	.mac_addr = {0x00, 0x02, 0xb3, 0x01, 0x02, 0x03},
	};

	static bool modparam_reset;
	module_param_named(reset, modparam_reset, bool, 0644);
	MODULE_PARM_DESC(reset, "reset on firmware errors (default 0 [not reset])");

	static bool modparam_wimax_enable = true;
	module_param_named(wimax_enable, modparam_wimax_enable, bool, 0644);
	MODULE_PARM_DESC(wimax_enable, "Enable wimax core (default 1 [wimax enabled])");

	int iwm_mode_to_nl80211_iftype(int mode)
	{
	switch (mode) {
	case UMAC_MODE_BSS:
	return NL80211_IFTYPE_STATION;
	case UMAC_MODE_IBSS:
	return NL80211_IFTYPE_ADHOC;
	default:
	return NL80211_IFTYPE_UNSPECIFIED;
	}

	return 0;
	}

	static void iwm_statistics_request(struct work_struct *work)
	{
	struct iwm_priv *iwm =
	container_of(work, struct iwm_priv, stats_request.work);

	iwm_send_umac_stats_req(iwm, 0);
	}

	static void iwm_disconnect_work(struct work_struct *work)
	{
	struct iwm_priv *iwm =
	container_of(work, struct iwm_priv, disconnect.work);

	if (iwm->umac_profile_active)
	iwm_invalidate_mlme_profile(iwm);

	clear_bit(IWM_STATUS_ASSOCIATED, &iwm->status);
	iwm->umac_profile_active = false;
	memset(iwm->bssid, 0, ETH_ALEN);
	iwm->channel = 0;

	iwm_link_off(iwm);

	wake_up_interruptible(&iwm->mlme_queue);

	cfg80211_disconnected(iwm_to_ndev(iwm), 0, NULL, 0, GFP_KERNEL);
	}

	static void iwm_ct_kill_work(struct work_struct *work)
	{
	struct iwm_priv *iwm =
	container_of(work, struct iwm_priv, ct_kill_delay.work);
	struct wiphy *wiphy = iwm_to_wiphy(iwm);

	IWM_INFO(iwm, "CT kill delay timeout\n");

	wiphy_rfkill_set_hw_state(wiphy, false);
	}

	static int __iwm_up(struct iwm_priv *iwm);
	static int __iwm_down(struct iwm_priv *iwm);

	static void iwm_reset_worker(struct work_struct *work)
	{
	struct iwm_priv *iwm;
	struct iwm_umac_profile *profile = NULL;
	int uninitialized_var(ret), retry = 0;

	iwm = container_of(work, struct iwm_priv, reset_worker);

	/*
	* XXX: The iwm->mutex is introduced purely for this reset work,
	* because the other users for iwm_up and iwm_down are only netdev
	* ndo_open and ndo_stop which are already protected by rtnl.
	* Please remove iwm->mutex together if iwm_reset_worker() is not
	* required in the future.
	*/
	if (!mutex_trylock(&iwm->mutex)) {
	IWM_WARN(iwm, "We are in the middle of interface bringing "
	"UP/DOWN. Skip driver resetting.\n");
	return;
	}

	if (iwm->umac_profile_active) {
	profile = kmalloc(sizeof(struct iwm_umac_profile), GFP_KERNEL);
	if (profile)
	memcpy(profile, iwm->umac_profile, sizeof(*profile));
	else
	IWM_ERR(iwm, "Couldn't alloc memory for profile\n");
	}

	__iwm_down(iwm);

	while (retry++ < 3) {
	ret = __iwm_up(iwm);
	if (!ret)
	break;

	schedule_timeout_uninterruptible(10 * HZ);
	}

	if (ret) {
	IWM_WARN(iwm, "iwm_up() failed: %d\n", ret);

	kfree(profile);
	goto out;
	}

	if (profile) {
	IWM_DBG_MLME(iwm, DBG, "Resend UMAC profile\n");
	memcpy(iwm->umac_profile, profile, sizeof(*profile));
	iwm_send_mlme_profile(iwm);
	kfree(profile);
	} else
	clear_bit(IWM_STATUS_RESETTING, &iwm->status);

	out:
	mutex_unlock(&iwm->mutex);
	}

	static void iwm_auth_retry_worker(struct work_struct *work)
	{
	struct iwm_priv *iwm;
	int i, ret;

	iwm = container_of(work, struct iwm_priv, auth_retry_worker);
	if (iwm->umac_profile_active) {
	ret = iwm_invalidate_mlme_profile(iwm);
	if (ret < 0)
	return;
	}

	iwm->umac_profile->sec.auth_type = UMAC_AUTH_TYPE_LEGACY_PSK;

	ret = iwm_send_mlme_profile(iwm);
	if (ret < 0)
	return;

	for (i = 0; i < IWM_NUM_KEYS; i++)
	if (iwm->keys[i].key_len)
	iwm_set_key(iwm, 0, &iwm->keys[i]);

	iwm_set_tx_key(iwm, iwm->default_key);
	}



	static void iwm_watchdog(unsigned long data)
	{
	struct iwm_priv iwm = (struct iwm_priv )data;

	IWM_WARN(iwm, "Watchdog expired: UMAC stalls!\n");

	if (modparam_reset)
	iwm_resetting(iwm);
	}

	int iwm_priv_init(struct iwm_priv *iwm)
	{
	int i, j;
	char name[32];

	iwm->status = 0;
	INIT_LIST_HEAD(&iwm->pending_notif);
	init_waitqueue_head(&iwm->notif_queue);
	init_waitqueue_head(&iwm->nonwifi_queue);
	init_waitqueue_head(&iwm->wifi_ntfy_queue);
	init_waitqueue_head(&iwm->mlme_queue);
	memcpy(&iwm->conf, &def_iwm_conf, sizeof(struct iwm_conf));
	spin_lock_init(&iwm->tx_credit.lock);
	INIT_LIST_HEAD(&iwm->wifi_pending_cmd);
	INIT_LIST_HEAD(&iwm->nonwifi_pending_cmd);
	iwm->wifi_seq_num = UMAC_WIFI_SEQ_NUM_BASE;
	iwm->nonwifi_seq_num = UMAC_NONWIFI_SEQ_NUM_BASE;
	spin_lock_init(&iwm->cmd_lock);
	iwm->scan_id = 1;
	INIT_DELAYED_WORK(&iwm->stats_request, iwm_statistics_request);
	INIT_DELAYED_WORK(&iwm->disconnect, iwm_disconnect_work);
	INIT_DELAYED_WORK(&iwm->ct_kill_delay, iwm_ct_kill_work);
	INIT_WORK(&iwm->reset_worker, iwm_reset_worker);
	INIT_WORK(&iwm->auth_retry_worker, iwm_auth_retry_worker);
	INIT_LIST_HEAD(&iwm->bss_list);

	skb_queue_head_init(&iwm->rx_list);
	INIT_LIST_HEAD(&iwm->rx_tickets);
	spin_lock_init(&iwm->ticket_lock);
	for (i = 0; i < IWM_RX_ID_HASH; i++) {
	INIT_LIST_HEAD(&iwm->rx_packets[i]);
	spin_lock_init(&iwm->packet_lock[i]);
	}

	INIT_WORK(&iwm->rx_worker, iwm_rx_worker);

	iwm->rx_wq = create_singlethread_workqueue(KBUILD_MODNAME "_rx");
	if (!iwm->rx_wq)
	return -EAGAIN;

	for (i = 0; i < IWM_TX_QUEUES; i++) {
	INIT_WORK(&iwm->txq[i].worker, iwm_tx_worker);
	snprintf(name, 32, KBUILD_MODNAME "_tx_%d", i);
	iwm->txq[i].id = i;
	iwm->txq[i].wq = create_singlethread_workqueue(name);
	if (!iwm->txq[i].wq)
	return -EAGAIN;

	skb_queue_head_init(&iwm->txq[i].queue);
	skb_queue_head_init(&iwm->txq[i].stopped_queue);
	spin_lock_init(&iwm->txq[i].lock);
	}

	for (i = 0; i < IWM_NUM_KEYS; i++)
	memset(&iwm->keys[i], 0, sizeof(struct iwm_key));

	iwm->default_key = -1;

	for (i = 0; i < IWM_STA_TABLE_NUM; i++)
	for (j = 0; j < IWM_UMAC_TID_NR; j++) {
	mutex_init(&iwm->sta_table[i].tid_info[j].mutex);
	iwm->sta_table[i].tid_info[j].stopped = false;
	}

	init_timer(&iwm->watchdog);
	iwm->watchdog.function = iwm_watchdog;
	iwm->watchdog.data = (unsigned long)iwm;
	mutex_init(&iwm->mutex);

	iwm->last_fw_err = kzalloc(sizeof(struct iwm_fw_error_hdr),
	GFP_KERNEL);
	if (iwm->last_fw_err == NULL)
	return -ENOMEM;

	return 0;
	}

	void iwm_priv_deinit(struct iwm_priv *iwm)
	{
	int i;

	for (i = 0; i < IWM_TX_QUEUES; i++)
	destroy_workqueue(iwm->txq[i].wq);

	destroy_workqueue(iwm->rx_wq);
	kfree(iwm->last_fw_err);
	}

	/*
	* We reset all the structures, and we reset the UMAC.
	* After calling this routine, you're expected to reload
	* the firmware.
	*/
	void iwm_reset(struct iwm_priv *iwm)
	{
	struct iwm_notif notif, next;

	if (test_bit(IWM_STATUS_READY, &iwm->status))
	iwm_target_reset(iwm);

	if (test_bit(IWM_STATUS_RESETTING, &iwm->status)) {
	iwm->status = 0;
	set_bit(IWM_STATUS_RESETTING, &iwm->status);
	} else
	iwm->status = 0;
	iwm->scan_id = 1;

	list_for_each_entry_safe(notif, next, &iwm->pending_notif, pending) {
	list_del(&notif->pending);
	kfree(notif->buf);
	kfree(notif);
	}

	iwm_cmd_flush(iwm);

	flush_workqueue(iwm->rx_wq);

	iwm_link_off(iwm);
	}

	void iwm_resetting(struct iwm_priv *iwm)
	{
	set_bit(IWM_STATUS_RESETTING, &iwm->status);

	schedule_work(&iwm->reset_worker);
	}

	/*
	* Notification code:
	*
	* We're faced with the following issue: Any host command can
	* have an answer or not, and if there's an answer to expect,
	* it can be treated synchronously or asynchronously.
	* To work around the synchronous answer case, we implemented
	* our notification mechanism.
	* When a code path needs to wait for a command response
	* synchronously, it calls notif_handle(), which waits for the
	* right notification to show up, and then process it. Before
	* starting to wait, it registered as a waiter for this specific
	* answer (by toggling a bit in on of the handler_map), so that
	* the rx code knows that it needs to send a notification to the
	* waiting processes. It does so by calling iwm_notif_send(),
	* which adds the notification to the pending notifications list,
	* and then wakes the waiting processes up.
	*/
	int iwm_notif_send(struct iwm_priv iwm, struct iwm_wifi_cmd cmd,
	u8 cmd_id, u8 source, u8 *buf, unsigned long buf_size)
	{
	struct iwm_notif *notif;

	notif = kzalloc(sizeof(struct iwm_notif), GFP_KERNEL);
	if (!notif) {
	IWM_ERR(iwm, "Couldn't alloc memory for notification\n");
	return -ENOMEM;
	}

	INIT_LIST_HEAD(&notif->pending);
	notif->cmd = cmd;
	notif->cmd_id = cmd_id;
	notif->src = source;
	notif->buf = kzalloc(buf_size, GFP_KERNEL);
	if (!notif->buf) {
	IWM_ERR(iwm, "Couldn't alloc notification buffer\n");
	kfree(notif);
	return -ENOMEM;
	}
	notif->buf_size = buf_size;
	memcpy(notif->buf, buf, buf_size);
	list_add_tail(&notif->pending, &iwm->pending_notif);

	wake_up_interruptible(&iwm->notif_queue);

	return 0;
	}

	static struct iwm_notif iwm_notif_find(struct iwm_priv iwm, u32 cmd,
	u8 source)
	{
	struct iwm_notif *notif;

	list_for_each_entry(notif, &iwm->pending_notif, pending) {
	if ((notif->cmd_id == cmd) && (notif->src == source)) {
	list_del(&notif->pending);
	return notif;
	}
	}

	return NULL;
	}

	static struct iwm_notif iwm_notif_wait(struct iwm_priv iwm, u32 cmd,
	u8 source, long timeout)
	{
	int ret;
	struct iwm_notif *notif;
	unsigned long *map = NULL;

	switch (source) {
	case IWM_SRC_LMAC:
	map = &iwm->lmac_handler_map[0];
	break;
	case IWM_SRC_UMAC:
	map = &iwm->umac_handler_map[0];
	break;
	case IWM_SRC_UDMA:
	map = &iwm->udma_handler_map[0];
	break;
	}

	set_bit(cmd, map);

	ret = wait_event_interruptible_timeout(iwm->notif_queue,
	((notif = iwm_notif_find(iwm, cmd, source)) != NULL),
	timeout);
	clear_bit(cmd, map);

	if (!ret)
	return NULL;

	return notif;
	}

	int iwm_notif_handle(struct iwm_priv *iwm, u32 cmd, u8 source, long timeout)
	{
	int ret;
	struct iwm_notif *notif;

	notif = iwm_notif_wait(iwm, cmd, source, timeout);
	if (!notif)
	return -ETIME;

	ret = iwm_rx_handle_resp(iwm, notif->buf, notif->buf_size, notif->cmd);
	kfree(notif->buf);
	kfree(notif);

	return ret;
	}

	static int iwm_config_boot_params(struct iwm_priv *iwm)
	{
	struct iwm_udma_nonwifi_cmd target_cmd;
	int ret;

	/* check Wimax is off and config debug monitor */
	if (!modparam_wimax_enable) {
	u32 data1 = 0x1f;
	u32 addr1 = 0x606BE258;

	u32 data2_set = 0x0;
	u32 data2_clr = 0x1;
	u32 addr2 = 0x606BE100;

	u32 data3 = 0x1;
	u32 addr3 = 0x606BEC00;

	target_cmd.resp = 0;
	target_cmd.handle_by_hw = 0;
	target_cmd.eop = 1;

	target_cmd.opcode = UMAC_HDI_OUT_OPCODE_WRITE;
	target_cmd.addr = cpu_to_le32(addr1);
	target_cmd.op1_sz = cpu_to_le32(sizeof(u32));
	target_cmd.op2 = 0;

	ret = iwm_hal_send_target_cmd(iwm, &target_cmd, &data1);
	if (ret < 0) {
	IWM_ERR(iwm, "iwm_hal_send_target_cmd failed\n");
	return ret;
	}

	target_cmd.opcode = UMAC_HDI_OUT_OPCODE_READ_MODIFY_WRITE;
	target_cmd.addr = cpu_to_le32(addr2);
	target_cmd.op1_sz = cpu_to_le32(data2_set);
	target_cmd.op2 = cpu_to_le32(data2_clr);

	ret = iwm_hal_send_target_cmd(iwm, &target_cmd, &data1);
	if (ret < 0) {
	IWM_ERR(iwm, "iwm_hal_send_target_cmd failed\n");
	return ret;
	}

	target_cmd.opcode = UMAC_HDI_OUT_OPCODE_WRITE;
	target_cmd.addr = cpu_to_le32(addr3);
	target_cmd.op1_sz = cpu_to_le32(sizeof(u32));
	target_cmd.op2 = 0;

	ret = iwm_hal_send_target_cmd(iwm, &target_cmd, &data3);
	if (ret < 0) {
	IWM_ERR(iwm, "iwm_hal_send_target_cmd failed\n");
	return ret;
	}
	}

	return 0;
	}

	void iwm_init_default_profile(struct iwm_priv *iwm,
	struct iwm_umac_profile *profile)
	{
	memset(profile, 0, sizeof(struct iwm_umac_profile));

	profile->sec.auth_type = UMAC_AUTH_TYPE_OPEN;
	profile->sec.flags = UMAC_SEC_FLG_LEGACY_PROFILE;
	profile->sec.ucast_cipher = UMAC_CIPHER_TYPE_NONE;
	profile->sec.mcast_cipher = UMAC_CIPHER_TYPE_NONE;

	if (iwm->conf.enable_qos)
	profile->flags \|= cpu_to_le16(UMAC_PROFILE_QOS_ALLOWED);

	profile->wireless_mode = iwm->conf.wireless_mode;
	profile->mode = cpu_to_le32(iwm->conf.mode);

	profile->ibss.atim = 0;
	profile->ibss.beacon_interval = 100;
	profile->ibss.join_only = 0;
	profile->ibss.band = iwm->conf.ibss_band;
	profile->ibss.channel = iwm->conf.ibss_channel;
	}

	void iwm_link_on(struct iwm_priv *iwm)
	{
	netif_carrier_on(iwm_to_ndev(iwm));
	netif_tx_wake_all_queues(iwm_to_ndev(iwm));

	iwm_send_umac_stats_req(iwm, 0);
	}

	void iwm_link_off(struct iwm_priv *iwm)
	{
	struct iw_statistics *wstats = &iwm->wstats;
	int i;

	netif_tx_stop_all_queues(iwm_to_ndev(iwm));
	netif_carrier_off(iwm_to_ndev(iwm));

	for (i = 0; i < IWM_TX_QUEUES; i++) {
	skb_queue_purge(&iwm->txq[i].queue);
	skb_queue_purge(&iwm->txq[i].stopped_queue);

	iwm->txq[i].concat_count = 0;
	iwm->txq[i].concat_ptr = iwm->txq[i].concat_buf;

	flush_workqueue(iwm->txq[i].wq);
	}

	iwm_rx_free(iwm);

	cancel_delayed_work_sync(&iwm->stats_request);
	memset(wstats, 0, sizeof(struct iw_statistics));
	wstats->qual.updated = IW_QUAL_ALL_INVALID;

	kfree(iwm->req_ie);
	iwm->req_ie = NULL;
	iwm->req_ie_len = 0;
	kfree(iwm->resp_ie);
	iwm->resp_ie = NULL;
	iwm->resp_ie_len = 0;

	del_timer_sync(&iwm->watchdog);
	}

	static void iwm_bss_list_clean(struct iwm_priv *iwm)
	{
	struct iwm_bss_info bss, next;

	list_for_each_entry_safe(bss, next, &iwm->bss_list, node) {
	list_del(&bss->node);
	kfree(bss->bss);
	kfree(bss);
	}
	}

	static int iwm_channels_init(struct iwm_priv *iwm)
	{
	int ret;

	ret = iwm_send_umac_channel_list(iwm);
	if (ret) {
	IWM_ERR(iwm, "Send channel list failed\n");
	return ret;
	}

	ret = iwm_notif_handle(iwm, UMAC_CMD_OPCODE_GET_CHAN_INFO_LIST,
	IWM_SRC_UMAC, WAIT_NOTIF_TIMEOUT);
	if (ret) {
	IWM_ERR(iwm, "Didn't get a channel list notification\n");
	return ret;
	}

	return 0;
	}

	static int __iwm_up(struct iwm_priv *iwm)
	{
	int ret;
	struct iwm_notif notif_reboot, notif_ack = NULL;
	struct wiphy *wiphy = iwm_to_wiphy(iwm);
	u32 wireless_mode;

	ret = iwm_bus_enable(iwm);
	if (ret) {
	IWM_ERR(iwm, "Couldn't enable function\n");
	return ret;
	}

	iwm_rx_setup_handlers(iwm);

	/* Wait for initial BARKER_REBOOT from hardware */
	notif_reboot = iwm_notif_wait(iwm, IWM_BARKER_REBOOT_NOTIFICATION,
	IWM_SRC_UDMA, 2 * HZ);
	if (!notif_reboot) {
	IWM_ERR(iwm, "Wait for REBOOT_BARKER timeout\n");
	goto err_disable;
	}

	/* We send the barker back */
	ret = iwm_bus_send_chunk(iwm, notif_reboot->buf, 16);
	if (ret) {
	IWM_ERR(iwm, "REBOOT barker response failed\n");
	kfree(notif_reboot);
	goto err_disable;
	}

	kfree(notif_reboot->buf);
	kfree(notif_reboot);

	/* Wait for ACK_BARKER from hardware */
	notif_ack = iwm_notif_wait(iwm, IWM_ACK_BARKER_NOTIFICATION,
	IWM_SRC_UDMA, 2 * HZ);
	if (!notif_ack) {
	IWM_ERR(iwm, "Wait for ACK_BARKER timeout\n");
	goto err_disable;
	}

	kfree(notif_ack->buf);
	kfree(notif_ack);

	/* We start to config static boot parameters */
	ret = iwm_config_boot_params(iwm);
	if (ret) {
	IWM_ERR(iwm, "Config boot parameters failed\n");
	goto err_disable;
	}

	ret = iwm_read_mac(iwm, iwm_to_ndev(iwm)->dev_addr);
	if (ret) {
	IWM_ERR(iwm, "MAC reading failed\n");
	goto err_disable;
	}
	memcpy(iwm_to_ndev(iwm)->perm_addr, iwm_to_ndev(iwm)->dev_addr,
	ETH_ALEN);

	/* We can load the FWs */
	ret = iwm_load_fw(iwm);
	if (ret) {
	IWM_ERR(iwm, "FW loading failed\n");
	goto err_disable;
	}

	ret = iwm_eeprom_fat_channels(iwm);
	if (ret) {
	IWM_ERR(iwm, "Couldnt read HT channels EEPROM entries\n");
	goto err_fw;
	}

	/*
	* Read our SKU capabilities.
	* If it's valid, we AND the configured wireless mode with the
	* device EEPROM value as the current profile wireless mode.
	*/
	wireless_mode = iwm_eeprom_wireless_mode(iwm);
	if (wireless_mode) {
	iwm->conf.wireless_mode &= wireless_mode;
	if (iwm->umac_profile)
	iwm->umac_profile->wireless_mode =
	iwm->conf.wireless_mode;
	} else
	IWM_ERR(iwm, "Wrong SKU capabilities: 0x%x\n",
	((u16 )iwm_eeprom_access(iwm, IWM_EEPROM_SKU_CAP)));

	snprintf(wiphy->fw_version, sizeof(wiphy->fw_version), "L%s_U%s",
	iwm->lmac_version, iwm->umac_version);

	/* We configure the UMAC and enable the wifi module */
	ret = iwm_send_umac_config(iwm,
	cpu_to_le32(UMAC_RST_CTRL_FLG_WIFI_CORE_EN) \|
	cpu_to_le32(UMAC_RST_CTRL_FLG_WIFI_LINK_EN) \|
	cpu_to_le32(UMAC_RST_CTRL_FLG_WIFI_MLME_EN));
	if (ret) {
	IWM_ERR(iwm, "UMAC config failed\n");
	goto err_fw;
	}

	ret = iwm_notif_handle(iwm, UMAC_NOTIFY_OPCODE_WIFI_CORE_STATUS,
	IWM_SRC_UMAC, WAIT_NOTIF_TIMEOUT);
	if (ret) {
	IWM_ERR(iwm, "Didn't get a wifi core status notification\n");
	goto err_fw;
	}

	if (iwm->core_enabled != (UMAC_NTFY_WIFI_CORE_STATUS_LINK_EN \|
	UMAC_NTFY_WIFI_CORE_STATUS_MLME_EN)) {
	IWM_DBG_BOOT(iwm, DBG, "Not all cores enabled:0x%x\n",
	iwm->core_enabled);
	ret = iwm_notif_handle(iwm, UMAC_NOTIFY_OPCODE_WIFI_CORE_STATUS,
	IWM_SRC_UMAC, WAIT_NOTIF_TIMEOUT);
	if (ret) {
	IWM_ERR(iwm, "Didn't get a core status notification\n");
	goto err_fw;
	}

	if (iwm->core_enabled != (UMAC_NTFY_WIFI_CORE_STATUS_LINK_EN \|
	UMAC_NTFY_WIFI_CORE_STATUS_MLME_EN)) {
	IWM_ERR(iwm, "Not all cores enabled: 0x%x\n",
	iwm->core_enabled);
	goto err_fw;
	} else {
	IWM_INFO(iwm, "All cores enabled\n");
	}
	}

	ret = iwm_channels_init(iwm);
	if (ret < 0) {
	IWM_ERR(iwm, "Couldn't init channels\n");
	goto err_fw;
	}

	/* Set the READY bit to indicate interface is brought up successfully */
	set_bit(IWM_STATUS_READY, &iwm->status);

	return 0;

	err_fw:
	iwm_eeprom_exit(iwm);

	err_disable:
	ret = iwm_bus_disable(iwm);
	if (ret < 0)
	IWM_ERR(iwm, "Couldn't disable function\n");

	return -EIO;
	}

	int iwm_up(struct iwm_priv *iwm)
	{
	int ret;

	mutex_lock(&iwm->mutex);
	ret = __iwm_up(iwm);
	mutex_unlock(&iwm->mutex);

	return ret;
	}

	static int __iwm_down(struct iwm_priv *iwm)
	{
	int ret;

	/* The interface is already down */
	if (!test_bit(IWM_STATUS_READY, &iwm->status))
	return 0;

	if (iwm->scan_request) {
	cfg80211_scan_done(iwm->scan_request, true);
	iwm->scan_request = NULL;
	}

	clear_bit(IWM_STATUS_READY, &iwm->status);

	iwm_eeprom_exit(iwm);
	iwm_bss_list_clean(iwm);
	iwm_init_default_profile(iwm, iwm->umac_profile);
	iwm->umac_profile_active = false;
	iwm->default_key = -1;
	iwm->core_enabled = 0;

	ret = iwm_bus_disable(iwm);
	if (ret < 0) {
	IWM_ERR(iwm, "Couldn't disable function\n");
	return ret;
	}

	return 0;
	}

	int iwm_down(struct iwm_priv *iwm)
	{
	int ret;

	mutex_lock(&iwm->mutex);
	ret = __iwm_down(iwm);
	mutex_unlock(&iwm->mutex);

	return ret;
	}