diff options
Diffstat (limited to 'drivers/net/wireless/mwifiex/init.c')
| -rw-r--r-- | drivers/net/wireless/mwifiex/init.c | 720 | 
1 files changed, 720 insertions, 0 deletions
diff --git a/drivers/net/wireless/mwifiex/init.c b/drivers/net/wireless/mwifiex/init.c new file mode 100644 index 00000000000..4ecd0b208ac --- /dev/null +++ b/drivers/net/wireless/mwifiex/init.c @@ -0,0 +1,720 @@ +/* + * Marvell Wireless LAN device driver: HW/FW Initialization + * + * Copyright (C) 2011, Marvell International Ltd. + * + * This software file (the "File") is distributed by Marvell International + * Ltd. under the terms of the GNU General Public License Version 2, June 1991 + * (the "License").  You may use, redistribute and/or modify this File in + * accordance with the terms and conditions of the License, a copy of which + * is available by writing to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the + * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt. + * + * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE + * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE + * ARE EXPRESSLY DISCLAIMED.  The License provides additional details about + * this warranty disclaimer. + */ + +#include "decl.h" +#include "ioctl.h" +#include "util.h" +#include "fw.h" +#include "main.h" +#include "wmm.h" +#include "11n.h" + +/* + * This function adds a BSS priority table to the table list. + * + * The function allocates a new BSS priority table node and adds it to + * the end of BSS priority table list, kept in driver memory. + */ +static int mwifiex_add_bss_prio_tbl(struct mwifiex_private *priv) +{ +	struct mwifiex_adapter *adapter = priv->adapter; +	struct mwifiex_bss_prio_node *bss_prio; +	struct mwifiex_bss_prio_tbl *tbl = adapter->bss_prio_tbl; +	unsigned long flags; + +	bss_prio = kzalloc(sizeof(struct mwifiex_bss_prio_node), GFP_KERNEL); +	if (!bss_prio) +		return -ENOMEM; + +	bss_prio->priv = priv; +	INIT_LIST_HEAD(&bss_prio->list); + +	spin_lock_irqsave(&tbl[priv->bss_priority].bss_prio_lock, flags); +	list_add_tail(&bss_prio->list, &tbl[priv->bss_priority].bss_prio_head); +	spin_unlock_irqrestore(&tbl[priv->bss_priority].bss_prio_lock, flags); + +	return 0; +} + +/* + * This function initializes the private structure and sets default + * values to the members. + * + * Additionally, it also initializes all the locks and sets up all the + * lists. + */ +int mwifiex_init_priv(struct mwifiex_private *priv) +{ +	u32 i; + +	priv->media_connected = false; +	memset(priv->curr_addr, 0xff, ETH_ALEN); + +	priv->pkt_tx_ctrl = 0; +	priv->bss_mode = NL80211_IFTYPE_UNSPECIFIED; +	priv->data_rate = 0;	/* Initially indicate the rate as auto */ +	priv->is_data_rate_auto = true; +	priv->bcn_avg_factor = DEFAULT_BCN_AVG_FACTOR; +	priv->data_avg_factor = DEFAULT_DATA_AVG_FACTOR; + +	priv->sec_info.wep_enabled = 0; +	priv->sec_info.authentication_mode = NL80211_AUTHTYPE_OPEN_SYSTEM; +	priv->sec_info.encryption_mode = 0; +	for (i = 0; i < ARRAY_SIZE(priv->wep_key); i++) +		memset(&priv->wep_key[i], 0, sizeof(struct mwifiex_wep_key)); +	priv->wep_key_curr_index = 0; +	priv->curr_pkt_filter = HostCmd_ACT_MAC_RX_ON | HostCmd_ACT_MAC_TX_ON | +				HostCmd_ACT_MAC_ETHERNETII_ENABLE; + +	priv->beacon_period = 100; /* beacon interval */ ; +	priv->attempted_bss_desc = NULL; +	memset(&priv->curr_bss_params, 0, sizeof(priv->curr_bss_params)); +	priv->listen_interval = MWIFIEX_DEFAULT_LISTEN_INTERVAL; + +	memset(&priv->prev_ssid, 0, sizeof(priv->prev_ssid)); +	memset(&priv->prev_bssid, 0, sizeof(priv->prev_bssid)); +	memset(&priv->assoc_rsp_buf, 0, sizeof(priv->assoc_rsp_buf)); +	priv->assoc_rsp_size = 0; +	priv->adhoc_channel = DEFAULT_AD_HOC_CHANNEL; +	priv->atim_window = 0; +	priv->adhoc_state = ADHOC_IDLE; +	priv->tx_power_level = 0; +	priv->max_tx_power_level = 0; +	priv->min_tx_power_level = 0; +	priv->tx_rate = 0; +	priv->rxpd_htinfo = 0; +	priv->rxpd_rate = 0; +	priv->rate_bitmap = 0; +	priv->data_rssi_last = 0; +	priv->data_rssi_avg = 0; +	priv->data_nf_avg = 0; +	priv->data_nf_last = 0; +	priv->bcn_rssi_last = 0; +	priv->bcn_rssi_avg = 0; +	priv->bcn_nf_avg = 0; +	priv->bcn_nf_last = 0; +	memset(&priv->wpa_ie, 0, sizeof(priv->wpa_ie)); +	memset(&priv->aes_key, 0, sizeof(priv->aes_key)); +	priv->wpa_ie_len = 0; +	priv->wpa_is_gtk_set = false; + +	memset(&priv->assoc_tlv_buf, 0, sizeof(priv->assoc_tlv_buf)); +	priv->assoc_tlv_buf_len = 0; +	memset(&priv->wps, 0, sizeof(priv->wps)); +	memset(&priv->gen_ie_buf, 0, sizeof(priv->gen_ie_buf)); +	priv->gen_ie_buf_len = 0; +	memset(priv->vs_ie, 0, sizeof(priv->vs_ie)); + +	priv->wmm_required = true; +	priv->wmm_enabled = false; +	priv->wmm_qosinfo = 0; +	priv->curr_bcn_buf = NULL; +	priv->curr_bcn_size = 0; +	priv->wps_ie = NULL; +	priv->wps_ie_len = 0; +	priv->ap_11n_enabled = 0; +	memset(&priv->roc_cfg, 0, sizeof(priv->roc_cfg)); + +	priv->scan_block = false; + +	priv->csa_chan = 0; +	priv->csa_expire_time = 0; +	priv->del_list_idx = 0; +	priv->hs2_enabled = false; +	memcpy(priv->tos_to_tid_inv, tos_to_tid_inv, MAX_NUM_TID); + +	return mwifiex_add_bss_prio_tbl(priv); +} + +/* + * This function allocates buffers for members of the adapter + * structure. + * + * The memory allocated includes scan table, command buffers, and + * sleep confirm command buffer. In addition, the queues are + * also initialized. + */ +static int mwifiex_allocate_adapter(struct mwifiex_adapter *adapter) +{ +	int ret; + +	/* Allocate command buffer */ +	ret = mwifiex_alloc_cmd_buffer(adapter); +	if (ret) { +		dev_err(adapter->dev, "%s: failed to alloc cmd buffer\n", +			__func__); +		return -1; +	} + +	adapter->sleep_cfm = +		dev_alloc_skb(sizeof(struct mwifiex_opt_sleep_confirm) +			      + INTF_HEADER_LEN); + +	if (!adapter->sleep_cfm) { +		dev_err(adapter->dev, "%s: failed to alloc sleep cfm" +			" cmd buffer\n", __func__); +		return -1; +	} +	skb_reserve(adapter->sleep_cfm, INTF_HEADER_LEN); + +	return 0; +} + +/* + * This function initializes the adapter structure and sets default + * values to the members of adapter. + * + * This also initializes the WMM related parameters in the driver private + * structures. + */ +static void mwifiex_init_adapter(struct mwifiex_adapter *adapter) +{ +	struct mwifiex_opt_sleep_confirm *sleep_cfm_buf = NULL; + +	skb_put(adapter->sleep_cfm, sizeof(struct mwifiex_opt_sleep_confirm)); + +	adapter->cmd_sent = false; + +	if (adapter->iface_type == MWIFIEX_SDIO) +		adapter->data_sent = true; +	else +		adapter->data_sent = false; + +	adapter->cmd_resp_received = false; +	adapter->event_received = false; +	adapter->data_received = false; + +	adapter->surprise_removed = false; + +	adapter->hw_status = MWIFIEX_HW_STATUS_INITIALIZING; + +	adapter->ps_mode = MWIFIEX_802_11_POWER_MODE_CAM; +	adapter->ps_state = PS_STATE_AWAKE; +	adapter->need_to_wakeup = false; + +	adapter->scan_mode = HostCmd_BSS_MODE_ANY; +	adapter->specific_scan_time = MWIFIEX_SPECIFIC_SCAN_CHAN_TIME; +	adapter->active_scan_time = MWIFIEX_ACTIVE_SCAN_CHAN_TIME; +	adapter->passive_scan_time = MWIFIEX_PASSIVE_SCAN_CHAN_TIME; + +	adapter->scan_probes = 1; + +	adapter->multiple_dtim = 1; + +	adapter->local_listen_interval = 0;	/* default value in firmware +						   will be used */ + +	adapter->is_deep_sleep = false; + +	adapter->delay_null_pkt = false; +	adapter->delay_to_ps = 1000; +	adapter->enhanced_ps_mode = PS_MODE_AUTO; + +	adapter->gen_null_pkt = false;	/* Disable NULL Pkg generation by +					   default */ +	adapter->pps_uapsd_mode = false; /* Disable pps/uapsd mode by +					   default */ +	adapter->pm_wakeup_card_req = false; + +	adapter->pm_wakeup_fw_try = false; + +	adapter->curr_tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_2K; + +	adapter->is_hs_configured = false; +	adapter->hs_cfg.conditions = cpu_to_le32(HS_CFG_COND_DEF); +	adapter->hs_cfg.gpio = HS_CFG_GPIO_DEF; +	adapter->hs_cfg.gap = HS_CFG_GAP_DEF; +	adapter->hs_activated = false; + +	memset(adapter->event_body, 0, sizeof(adapter->event_body)); +	adapter->hw_dot_11n_dev_cap = 0; +	adapter->hw_dev_mcs_support = 0; +	adapter->sec_chan_offset = 0; +	adapter->adhoc_11n_enabled = false; + +	mwifiex_wmm_init(adapter); + +	if (adapter->sleep_cfm) { +		sleep_cfm_buf = (struct mwifiex_opt_sleep_confirm *) +						adapter->sleep_cfm->data; +		memset(sleep_cfm_buf, 0, adapter->sleep_cfm->len); +		sleep_cfm_buf->command = +				cpu_to_le16(HostCmd_CMD_802_11_PS_MODE_ENH); +		sleep_cfm_buf->size = +				cpu_to_le16(adapter->sleep_cfm->len); +		sleep_cfm_buf->result = 0; +		sleep_cfm_buf->action = cpu_to_le16(SLEEP_CONFIRM); +		sleep_cfm_buf->resp_ctrl = cpu_to_le16(RESP_NEEDED); +	} +	memset(&adapter->sleep_params, 0, sizeof(adapter->sleep_params)); +	memset(&adapter->sleep_period, 0, sizeof(adapter->sleep_period)); +	adapter->tx_lock_flag = false; +	adapter->null_pkt_interval = 0; +	adapter->fw_bands = 0; +	adapter->config_bands = 0; +	adapter->adhoc_start_band = 0; +	adapter->scan_channels = NULL; +	adapter->fw_release_number = 0; +	adapter->fw_cap_info = 0; +	memset(&adapter->upld_buf, 0, sizeof(adapter->upld_buf)); +	adapter->event_cause = 0; +	adapter->region_code = 0; +	adapter->bcn_miss_time_out = DEFAULT_BCN_MISS_TIMEOUT; +	adapter->adhoc_awake_period = 0; +	memset(&adapter->arp_filter, 0, sizeof(adapter->arp_filter)); +	adapter->arp_filter_size = 0; +	adapter->max_mgmt_ie_index = MAX_MGMT_IE_INDEX; +	adapter->empty_tx_q_cnt = 0; +	adapter->ext_scan = true; +	adapter->fw_key_api_major_ver = 0; +	adapter->fw_key_api_minor_ver = 0; +} + +/* + * This function sets trans_start per tx_queue + */ +void mwifiex_set_trans_start(struct net_device *dev) +{ +	int i; + +	for (i = 0; i < dev->num_tx_queues; i++) +		netdev_get_tx_queue(dev, i)->trans_start = jiffies; + +	dev->trans_start = jiffies; +} + +/* + * This function wakes up all queues in net_device + */ +void mwifiex_wake_up_net_dev_queue(struct net_device *netdev, +					struct mwifiex_adapter *adapter) +{ +	unsigned long dev_queue_flags; +	unsigned int i; + +	spin_lock_irqsave(&adapter->queue_lock, dev_queue_flags); + +	for (i = 0; i < netdev->num_tx_queues; i++) { +		struct netdev_queue *txq = netdev_get_tx_queue(netdev, i); + +		if (netif_tx_queue_stopped(txq)) +			netif_tx_wake_queue(txq); +	} + +	spin_unlock_irqrestore(&adapter->queue_lock, dev_queue_flags); +} + +/* + * This function stops all queues in net_device + */ +void mwifiex_stop_net_dev_queue(struct net_device *netdev, +					struct mwifiex_adapter *adapter) +{ +	unsigned long dev_queue_flags; +	unsigned int i; + +	spin_lock_irqsave(&adapter->queue_lock, dev_queue_flags); + +	for (i = 0; i < netdev->num_tx_queues; i++) { +		struct netdev_queue *txq = netdev_get_tx_queue(netdev, i); + +		if (!netif_tx_queue_stopped(txq)) +			netif_tx_stop_queue(txq); +	} + +	spin_unlock_irqrestore(&adapter->queue_lock, dev_queue_flags); +} + +/* + *  This function releases the lock variables and frees the locks and + *  associated locks. + */ +static void mwifiex_free_lock_list(struct mwifiex_adapter *adapter) +{ +	struct mwifiex_private *priv; +	s32 i, j; + +	/* Free lists */ +	list_del(&adapter->cmd_free_q); +	list_del(&adapter->cmd_pending_q); +	list_del(&adapter->scan_pending_q); + +	for (i = 0; i < adapter->priv_num; i++) +		list_del(&adapter->bss_prio_tbl[i].bss_prio_head); + +	for (i = 0; i < adapter->priv_num; i++) { +		if (adapter->priv[i]) { +			priv = adapter->priv[i]; +			for (j = 0; j < MAX_NUM_TID; ++j) +				list_del(&priv->wmm.tid_tbl_ptr[j].ra_list); +			list_del(&priv->tx_ba_stream_tbl_ptr); +			list_del(&priv->rx_reorder_tbl_ptr); +			list_del(&priv->sta_list); +		} +	} +} + +/* + * This function performs cleanup for adapter structure. + * + * The cleanup is done recursively, by canceling all pending + * commands, freeing the member buffers previously allocated + * (command buffers, scan table buffer, sleep confirm command + * buffer), stopping the timers and calling the cleanup routines + * for every interface. + */ +static void +mwifiex_adapter_cleanup(struct mwifiex_adapter *adapter) +{ +	if (!adapter) { +		pr_err("%s: adapter is NULL\n", __func__); +		return; +	} + +	mwifiex_cancel_all_pending_cmd(adapter); + +	/* Free lock variables */ +	mwifiex_free_lock_list(adapter); + +	/* Free command buffer */ +	dev_dbg(adapter->dev, "info: free cmd buffer\n"); +	mwifiex_free_cmd_buffer(adapter); + +	dev_dbg(adapter->dev, "info: free scan table\n"); + +	if (adapter->sleep_cfm) +		dev_kfree_skb_any(adapter->sleep_cfm); +} + +/* + *  This function intializes the lock variables and + *  the list heads. + */ +int mwifiex_init_lock_list(struct mwifiex_adapter *adapter) +{ +	struct mwifiex_private *priv; +	s32 i, j; + +	spin_lock_init(&adapter->mwifiex_lock); +	spin_lock_init(&adapter->int_lock); +	spin_lock_init(&adapter->main_proc_lock); +	spin_lock_init(&adapter->mwifiex_cmd_lock); +	spin_lock_init(&adapter->queue_lock); +	for (i = 0; i < adapter->priv_num; i++) { +		if (adapter->priv[i]) { +			priv = adapter->priv[i]; +			spin_lock_init(&priv->rx_pkt_lock); +			spin_lock_init(&priv->wmm.ra_list_spinlock); +			spin_lock_init(&priv->curr_bcn_buf_lock); +			spin_lock_init(&priv->sta_list_spinlock); +		} +	} + +	/* Initialize cmd_free_q */ +	INIT_LIST_HEAD(&adapter->cmd_free_q); +	/* Initialize cmd_pending_q */ +	INIT_LIST_HEAD(&adapter->cmd_pending_q); +	/* Initialize scan_pending_q */ +	INIT_LIST_HEAD(&adapter->scan_pending_q); + +	spin_lock_init(&adapter->cmd_free_q_lock); +	spin_lock_init(&adapter->cmd_pending_q_lock); +	spin_lock_init(&adapter->scan_pending_q_lock); + +	skb_queue_head_init(&adapter->usb_rx_data_q); + +	for (i = 0; i < adapter->priv_num; ++i) { +		INIT_LIST_HEAD(&adapter->bss_prio_tbl[i].bss_prio_head); +		spin_lock_init(&adapter->bss_prio_tbl[i].bss_prio_lock); +	} + +	for (i = 0; i < adapter->priv_num; i++) { +		if (!adapter->priv[i]) +			continue; +		priv = adapter->priv[i]; +		for (j = 0; j < MAX_NUM_TID; ++j) +			INIT_LIST_HEAD(&priv->wmm.tid_tbl_ptr[j].ra_list); +		INIT_LIST_HEAD(&priv->tx_ba_stream_tbl_ptr); +		INIT_LIST_HEAD(&priv->rx_reorder_tbl_ptr); +		INIT_LIST_HEAD(&priv->sta_list); +		skb_queue_head_init(&priv->tdls_txq); + +		spin_lock_init(&priv->tx_ba_stream_tbl_lock); +		spin_lock_init(&priv->rx_reorder_tbl_lock); +	} + +	return 0; +} + +/* + * This function initializes the firmware. + * + * The following operations are performed sequentially - + *      - Allocate adapter structure + *      - Initialize the adapter structure + *      - Initialize the private structure + *      - Add BSS priority tables to the adapter structure + *      - For each interface, send the init commands to firmware + *      - Send the first command in command pending queue, if available + */ +int mwifiex_init_fw(struct mwifiex_adapter *adapter) +{ +	int ret; +	struct mwifiex_private *priv; +	u8 i, first_sta = true; +	int is_cmd_pend_q_empty; +	unsigned long flags; + +	adapter->hw_status = MWIFIEX_HW_STATUS_INITIALIZING; + +	/* Allocate memory for member of adapter structure */ +	ret = mwifiex_allocate_adapter(adapter); +	if (ret) +		return -1; + +	/* Initialize adapter structure */ +	mwifiex_init_adapter(adapter); + +	for (i = 0; i < adapter->priv_num; i++) { +		if (adapter->priv[i]) { +			priv = adapter->priv[i]; + +			/* Initialize private structure */ +			ret = mwifiex_init_priv(priv); +			if (ret) +				return -1; +		} +	} + +	if (adapter->if_ops.init_fw_port) { +		if (adapter->if_ops.init_fw_port(adapter)) +			return -1; +	} + +	for (i = 0; i < adapter->priv_num; i++) { +		if (adapter->priv[i]) { +			ret = mwifiex_sta_init_cmd(adapter->priv[i], first_sta); +			if (ret == -1) +				return -1; + +			first_sta = false; +		} +	} + +	spin_lock_irqsave(&adapter->cmd_pending_q_lock, flags); +	is_cmd_pend_q_empty = list_empty(&adapter->cmd_pending_q); +	spin_unlock_irqrestore(&adapter->cmd_pending_q_lock, flags); +	if (!is_cmd_pend_q_empty) { +		/* Send the first command in queue and return */ +		if (mwifiex_main_process(adapter) != -1) +			ret = -EINPROGRESS; +	} else { +		adapter->hw_status = MWIFIEX_HW_STATUS_READY; +	} + +	return ret; +} + +/* + * This function deletes the BSS priority tables. + * + * The function traverses through all the allocated BSS priority nodes + * in every BSS priority table and frees them. + */ +static void mwifiex_delete_bss_prio_tbl(struct mwifiex_private *priv) +{ +	int i; +	struct mwifiex_adapter *adapter = priv->adapter; +	struct mwifiex_bss_prio_node *bssprio_node, *tmp_node; +	struct list_head *head; +	spinlock_t *lock; /* bss priority lock */ +	unsigned long flags; + +	for (i = 0; i < adapter->priv_num; ++i) { +		head = &adapter->bss_prio_tbl[i].bss_prio_head; +		lock = &adapter->bss_prio_tbl[i].bss_prio_lock; +		dev_dbg(adapter->dev, "info: delete BSS priority table," +				" bss_type = %d, bss_num = %d, i = %d," +				" head = %p\n", +			      priv->bss_type, priv->bss_num, i, head); + +		{ +			spin_lock_irqsave(lock, flags); +			if (list_empty(head)) { +				spin_unlock_irqrestore(lock, flags); +				continue; +			} +			list_for_each_entry_safe(bssprio_node, tmp_node, head, +						 list) { +				if (bssprio_node->priv == priv) { +					dev_dbg(adapter->dev, "info: Delete " +						"node %p, next = %p\n", +						bssprio_node, tmp_node); +					list_del(&bssprio_node->list); +					kfree(bssprio_node); +				} +			} +			spin_unlock_irqrestore(lock, flags); +		} +	} +} + +/* + * This function frees the private structure, including cleans + * up the TX and RX queues and frees the BSS priority tables. + */ +void mwifiex_free_priv(struct mwifiex_private *priv) +{ +	mwifiex_clean_txrx(priv); +	mwifiex_delete_bss_prio_tbl(priv); +	mwifiex_free_curr_bcn(priv); +} + +/* + * This function is used to shutdown the driver. + * + * The following operations are performed sequentially - + *      - Check if already shut down + *      - Make sure the main process has stopped + *      - Clean up the Tx and Rx queues + *      - Delete BSS priority tables + *      - Free the adapter + *      - Notify completion + */ +int +mwifiex_shutdown_drv(struct mwifiex_adapter *adapter) +{ +	int ret = -EINPROGRESS; +	struct mwifiex_private *priv; +	s32 i; +	struct sk_buff *skb; + +	/* mwifiex already shutdown */ +	if (adapter->hw_status == MWIFIEX_HW_STATUS_NOT_READY) +		return 0; + +	adapter->hw_status = MWIFIEX_HW_STATUS_CLOSING; +	/* wait for mwifiex_process to complete */ +	if (adapter->mwifiex_processing) { +		dev_warn(adapter->dev, "main process is still running\n"); +		return ret; +	} + +	/* cancel current command */ +	if (adapter->curr_cmd) { +		dev_warn(adapter->dev, "curr_cmd is still in processing\n"); +		del_timer_sync(&adapter->cmd_timer); +		mwifiex_recycle_cmd_node(adapter, adapter->curr_cmd); +		adapter->curr_cmd = NULL; +	} + +	/* shut down mwifiex */ +	dev_dbg(adapter->dev, "info: shutdown mwifiex...\n"); + +	/* Clean up Tx/Rx queues and delete BSS priority table */ +	for (i = 0; i < adapter->priv_num; i++) { +		if (adapter->priv[i]) { +			priv = adapter->priv[i]; + +			mwifiex_clean_txrx(priv); +			mwifiex_delete_bss_prio_tbl(priv); +		} +	} + +	spin_lock(&adapter->mwifiex_lock); + +	if (adapter->if_ops.data_complete) { +		while ((skb = skb_dequeue(&adapter->usb_rx_data_q))) { +			struct mwifiex_rxinfo *rx_info = MWIFIEX_SKB_RXCB(skb); + +			priv = adapter->priv[rx_info->bss_num]; +			if (priv) +				priv->stats.rx_dropped++; + +			dev_kfree_skb_any(skb); +			adapter->if_ops.data_complete(adapter); +		} +	} + +	mwifiex_adapter_cleanup(adapter); + +	spin_unlock(&adapter->mwifiex_lock); + +	/* Notify completion */ +	ret = mwifiex_shutdown_fw_complete(adapter); + +	return ret; +} + +/* + * This function downloads the firmware to the card. + * + * The actual download is preceded by two sanity checks - + *      - Check if firmware is already running + *      - Check if the interface is the winner to download the firmware + * + * ...and followed by another - + *      - Check if the firmware is downloaded successfully + * + * After download is successfully completed, the host interrupts are enabled. + */ +int mwifiex_dnld_fw(struct mwifiex_adapter *adapter, +		    struct mwifiex_fw_image *pmfw) +{ +	int ret; +	u32 poll_num = 1; + +	if (adapter->if_ops.check_fw_status) { +		adapter->winner = 0; + +		/* check if firmware is already running */ +		ret = adapter->if_ops.check_fw_status(adapter, poll_num); +		if (!ret) { +			dev_notice(adapter->dev, +				   "WLAN FW already running! Skip FW dnld\n"); +			return 0; +		} + +		poll_num = MAX_FIRMWARE_POLL_TRIES; + +		/* check if we are the winner for downloading FW */ +		if (!adapter->winner) { +			dev_notice(adapter->dev, +				   "FW already running! Skip FW dnld\n"); +			goto poll_fw; +		} +	} + +	if (pmfw) { +		/* Download firmware with helper */ +		ret = adapter->if_ops.prog_fw(adapter, pmfw); +		if (ret) { +			dev_err(adapter->dev, "prog_fw failed ret=%#x\n", ret); +			return ret; +		} +	} + +poll_fw: +	/* Check if the firmware is downloaded successfully or not */ +	ret = adapter->if_ops.check_fw_status(adapter, poll_num); +	if (ret) +		dev_err(adapter->dev, "FW failed to be active in time\n"); + +	return ret; +}  | 
