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path: root/drivers/net/wireless/mwifiex/init.c
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Diffstat (limited to 'drivers/net/wireless/mwifiex/init.c')
-rw-r--r--drivers/net/wireless/mwifiex/init.c662
1 files changed, 662 insertions, 0 deletions
diff --git a/drivers/net/wireless/mwifiex/init.c b/drivers/net/wireless/mwifiex/init.c
new file mode 100644
index 000000000000..8189862da1f9
--- /dev/null
+++ b/drivers/net/wireless/mwifiex/init.c
@@ -0,0 +1,662 @@
+/*
+ * 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;
+ int status = 0;
+ unsigned long flags;
+
+ bss_prio = kzalloc(sizeof(struct mwifiex_bss_prio_node), GFP_KERNEL);
+ if (!bss_prio) {
+ dev_err(adapter->dev, "%s: failed to alloc bss_prio\n",
+ __func__);
+ return -1;
+ }
+
+ bss_prio->priv = priv;
+ INIT_LIST_HEAD(&bss_prio->list);
+ if (!adapter->bss_prio_tbl[priv->bss_priority].bss_prio_cur)
+ adapter->bss_prio_tbl[priv->bss_priority].bss_prio_cur =
+ bss_prio;
+
+ spin_lock_irqsave(&adapter->bss_prio_tbl[priv->bss_priority]
+ .bss_prio_lock, flags);
+ list_add_tail(&bss_prio->list,
+ &adapter->bss_prio_tbl[priv->bss_priority]
+ .bss_prio_head);
+ spin_unlock_irqrestore(&adapter->bss_prio_tbl[priv->bss_priority]
+ .bss_prio_lock, flags);
+
+ return status;
+}
+
+/*
+ * 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.
+ */
+static int mwifiex_init_priv(struct mwifiex_private *priv)
+{
+ u32 i;
+ int ret = 0;
+
+ priv->media_connected = false;
+ memset(priv->curr_addr, 0xff, ETH_ALEN);
+
+ priv->pkt_tx_ctrl = 0;
+ priv->bss_mode = NL80211_IFTYPE_STATION;
+ 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_status = MWIFIEX_802_11_WEP_DISABLED;
+ 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->scan_block = false;
+
+ ret = mwifiex_add_bss_prio_tbl(priv);
+
+ return ret;
+}
+
+/*
+ * 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 = 0;
+ u32 buf_size;
+ struct mwifiex_bssdescriptor *temp_scan_table;
+
+ /* Allocate buffer to store the BSSID list */
+ buf_size = sizeof(struct mwifiex_bssdescriptor) * IW_MAX_AP;
+ temp_scan_table = kzalloc(buf_size, GFP_KERNEL);
+ if (!temp_scan_table) {
+ dev_err(adapter->dev, "%s: failed to alloc temp_scan_table\n",
+ __func__);
+ return -1;
+ }
+
+ adapter->scan_table = temp_scan_table;
+
+ /* 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_buffer)
+ + 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_buffer *sleep_cfm_buf = NULL;
+
+ skb_put(adapter->sleep_cfm, sizeof(sleep_cfm_buf->ps_cfm_sleep));
+ sleep_cfm_buf = (struct mwifiex_opt_sleep_confirm_buffer *)
+ (adapter->sleep_cfm->data);
+
+ adapter->cmd_sent = false;
+ adapter->data_sent = true;
+ 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->num_in_scan_table = 0;
+ memset(adapter->scan_table, 0,
+ (sizeof(struct mwifiex_bssdescriptor) * IW_MAX_AP));
+ adapter->scan_probes = 1;
+
+ memset(adapter->bcn_buf, 0, sizeof(adapter->bcn_buf));
+ adapter->bcn_buf_end = adapter->bcn_buf;
+
+ 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->max_tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_2K;
+ adapter->tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_2K;
+ adapter->curr_tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_2K;
+
+ adapter->is_hs_configured = false;
+ adapter->hs_cfg.conditions = cpu_to_le32(HOST_SLEEP_CFG_COND_DEF);
+ adapter->hs_cfg.gpio = HOST_SLEEP_CFG_GPIO_DEF;
+ adapter->hs_cfg.gap = HOST_SLEEP_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->chan_offset = 0;
+ adapter->adhoc_11n_enabled = false;
+
+ mwifiex_wmm_init(adapter);
+
+ if (adapter->sleep_cfm) {
+ memset(&sleep_cfm_buf->ps_cfm_sleep, 0,
+ adapter->sleep_cfm->len);
+ sleep_cfm_buf->ps_cfm_sleep.command =
+ cpu_to_le16(HostCmd_CMD_802_11_PS_MODE_ENH);
+ sleep_cfm_buf->ps_cfm_sleep.size =
+ cpu_to_le16(adapter->sleep_cfm->len);
+ sleep_cfm_buf->ps_cfm_sleep.result = 0;
+ sleep_cfm_buf->ps_cfm_sleep.action = cpu_to_le16(SLEEP_CONFIRM);
+ sleep_cfm_buf->ps_cfm_sleep.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;
+
+ return;
+}
+
+/*
+ * This function frees the adapter structure.
+ *
+ * The freeing operation 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, before the actual adapter
+ * structure is freed.
+ */
+static void
+mwifiex_free_adapter(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);
+
+ del_timer(&adapter->cmd_timer);
+
+ dev_dbg(adapter->dev, "info: free scan table\n");
+ kfree(adapter->scan_table);
+ adapter->scan_table = NULL;
+
+ adapter->if_ops.cleanup_if(adapter);
+
+ dev_kfree_skb_any(adapter->sleep_cfm);
+
+ return;
+}
+
+/*
+ * This function intializes the lock variables and
+ * the list heads.
+ */
+int mwifiex_init_lock_list(struct mwifiex_adapter *adapter)
+{
+ struct mwifiex_private *priv = NULL;
+ s32 i = 0;
+ u32 j = 0;
+
+ 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);
+ 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);
+ }
+ }
+
+ /* 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);
+
+ for (i = 0; i < adapter->priv_num; ++i) {
+ INIT_LIST_HEAD(&adapter->bss_prio_tbl[i].bss_prio_head);
+ adapter->bss_prio_tbl[i].bss_prio_cur = NULL;
+ 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);
+ spin_lock_init(&priv->wmm.tid_tbl_ptr[j].tid_tbl_lock);
+ }
+ INIT_LIST_HEAD(&priv->tx_ba_stream_tbl_ptr);
+ INIT_LIST_HEAD(&priv->rx_reorder_tbl_ptr);
+
+ spin_lock_init(&priv->tx_ba_stream_tbl_lock);
+ spin_lock_init(&priv->rx_reorder_tbl_lock);
+ }
+
+ return 0;
+}
+
+/*
+ * This function releases the lock variables and frees the locks and
+ * associated locks.
+ */
+void mwifiex_free_lock_list(struct mwifiex_adapter *adapter)
+{
+ struct mwifiex_private *priv = NULL;
+ s32 i = 0;
+ s32 j = 0;
+
+ /* 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);
+ }
+ }
+
+ return;
+}
+
+/*
+ * 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 = 0;
+ struct mwifiex_private *priv = NULL;
+ u8 i = 0;
+ u8 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;
+ }
+ }
+ 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 = NULL, *tmp_node = NULL,
+ **cur = NULL;
+ struct list_head *head;
+ spinlock_t *lock;
+ unsigned long flags;
+
+ for (i = 0; i < adapter->priv_num; ++i) {
+ head = &adapter->bss_prio_tbl[i].bss_prio_head;
+ cur = &adapter->bss_prio_tbl[i].bss_prio_cur;
+ lock = &adapter->bss_prio_tbl[i].bss_prio_lock;
+ dev_dbg(adapter->dev, "info: delete BSS priority table,"
+ " index = %d, i = %d, head = %p, cur = %p\n",
+ priv->bss_index, i, head, *cur);
+ if (*cur) {
+ spin_lock_irqsave(lock, flags);
+ if (list_empty(head)) {
+ spin_unlock_irqrestore(lock, flags);
+ continue;
+ }
+ bssprio_node = list_first_entry(head,
+ struct mwifiex_bss_prio_node, list);
+ spin_unlock_irqrestore(lock, flags);
+
+ 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);
+ spin_lock_irqsave(lock, flags);
+ list_del(&bssprio_node->list);
+ spin_unlock_irqrestore(lock, flags);
+ kfree(bssprio_node);
+ }
+ }
+ *cur = (struct mwifiex_bss_prio_node *)head;
+ }
+ }
+}
+
+/*
+ * 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 = NULL;
+ s32 i = 0;
+ unsigned long flags;
+
+ /* 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;
+ }
+
+ /* 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_irqsave(&adapter->mwifiex_lock, flags);
+
+ /* Free adapter structure */
+ mwifiex_free_adapter(adapter);
+
+ spin_unlock_irqrestore(&adapter->mwifiex_lock, flags);
+
+ /* 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 = 0;
+ u32 poll_num = 1;
+ int winner;
+
+ /* Check if firmware is already running */
+ ret = adapter->if_ops.check_fw_status(adapter, poll_num, &winner);
+ if (!ret) {
+ dev_notice(adapter->dev,
+ "WLAN FW already running! Skip FW download\n");
+ goto done;
+ }
+ poll_num = MAX_FIRMWARE_POLL_TRIES;
+
+ /* Check if we are the winner for downloading FW */
+ if (!winner) {
+ dev_notice(adapter->dev,
+ "Other interface already running!"
+ " Skip FW download\n");
+ poll_num = MAX_MULTI_INTERFACE_POLL_TRIES;
+ 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, NULL);
+ if (ret) {
+ dev_err(adapter->dev, "FW failed to be active in time\n");
+ return -1;
+ }
+done:
+ /* re-enable host interrupt for mwifiex after fw dnld is successful */
+ adapter->if_ops.enable_int(adapter);
+ return ret;
+}