path: root/drivers/net/wireless/libertas/cmdresp.c

/**
  * This file contains the handling of command
  * responses as well as events generated by firmware.
  */
#include <linux/delay.h>
#include <linux/if_arp.h>
#include <linux/netdevice.h>

#include <net/iw_handler.h>

#include "host.h"
#include "decl.h"
#include "defs.h"
#include "dev.h"
#include "join.h"
#include "wext.h"

/**
 *  @brief This function handles disconnect event. it
 *  reports disconnect to upper layer, clean tx/rx packets,
 *  reset link state etc.
 *
 *  @param priv    A pointer to wlan_private structure
 *  @return 	   n/a
 */
void libertas_mac_event_disconnected(wlan_private * priv)
{
	wlan_adapter *adapter = priv->adapter;
	union iwreq_data wrqu;

	if (adapter->connect_status != LIBERTAS_CONNECTED)
		return;

	lbs_deb_enter(LBS_DEB_CMD);

	memset(wrqu.ap_addr.sa_data, 0x00, ETH_ALEN);
	wrqu.ap_addr.sa_family = ARPHRD_ETHER;

	/*
	 * Cisco AP sends EAP failure and de-auth in less than 0.5 ms.
	 * It causes problem in the Supplicant
	 */

	msleep_interruptible(1000);
	wireless_send_event(priv->dev, SIOCGIWAP, &wrqu, NULL);

	/* Free Tx and Rx packets */
	kfree_skb(priv->adapter->currenttxskb);
	priv->adapter->currenttxskb = NULL;

	/* report disconnect to upper layer */
	netif_stop_queue(priv->dev);
	netif_carrier_off(priv->dev);

	/* reset SNR/NF/RSSI values */
	memset(adapter->SNR, 0x00, sizeof(adapter->SNR));
	memset(adapter->NF, 0x00, sizeof(adapter->NF));
	memset(adapter->RSSI, 0x00, sizeof(adapter->RSSI));
	memset(adapter->rawSNR, 0x00, sizeof(adapter->rawSNR));
	memset(adapter->rawNF, 0x00, sizeof(adapter->rawNF));
	adapter->nextSNRNF = 0;
	adapter->numSNRNF = 0;
	lbs_deb_cmd("current SSID '%s', length %u\n",
	            escape_essid(adapter->curbssparams.ssid,
	                         adapter->curbssparams.ssid_len),
	            adapter->curbssparams.ssid_len);

	adapter->connect_status = LIBERTAS_DISCONNECTED;

	/* Clear out associated SSID and BSSID since connection is
	 * no longer valid.
	 */
	memset(&adapter->curbssparams.bssid, 0, ETH_ALEN);
	memset(&adapter->curbssparams.ssid, 0, IW_ESSID_MAX_SIZE);
	adapter->curbssparams.ssid_len = 0;

	if (adapter->psstate != PS_STATE_FULL_POWER) {
		/* make firmware to exit PS mode */
		lbs_deb_cmd("disconnected, so exit PS mode\n");
		libertas_ps_wakeup(priv, 0);
	}
	lbs_deb_leave(LBS_DEB_CMD);
}

/**
 *  @brief This function handles MIC failure event.
 *
 *  @param priv    A pointer to wlan_private structure
 *  @para  event   the event id
 *  @return 	   n/a
 */
static void handle_mic_failureevent(wlan_private * priv, u32 event)
{
	char buf[50];

	lbs_deb_enter(LBS_DEB_CMD);
	memset(buf, 0, sizeof(buf));

	sprintf(buf, "%s", "MLME-MICHAELMICFAILURE.indication ");

	if (event == MACREG_INT_CODE_MIC_ERR_UNICAST) {
		strcat(buf, "unicast ");
	} else {
		strcat(buf, "multicast ");
	}

	libertas_send_iwevcustom_event(priv, buf);
	lbs_deb_leave(LBS_DEB_CMD);
}

static int wlan_ret_reg_access(wlan_private * priv,
			       u16 type, struct cmd_ds_command *resp)
{
	int ret = 0;
	wlan_adapter *adapter = priv->adapter;

	lbs_deb_enter(LBS_DEB_CMD);

	switch (type) {
	case CMD_RET(CMD_MAC_REG_ACCESS):
		{
			struct cmd_ds_mac_reg_access *reg = &resp->params.macreg;

			adapter->offsetvalue.offset = (u32)le16_to_cpu(reg->offset);
			adapter->offsetvalue.value = le32_to_cpu(reg->value);
			break;
		}

	case CMD_RET(CMD_BBP_REG_ACCESS):
		{
			struct cmd_ds_bbp_reg_access *reg = &resp->params.bbpreg;

			adapter->offsetvalue.offset = (u32)le16_to_cpu(reg->offset);
			adapter->offsetvalue.value = reg->value;
			break;
		}

	case CMD_RET(CMD_RF_REG_ACCESS):
		{
			struct cmd_ds_rf_reg_access *reg = &resp->params.rfreg;

			adapter->offsetvalue.offset = (u32)le16_to_cpu(reg->offset);
			adapter->offsetvalue.value = reg->value;
			break;
		}

	default:
		ret = -1;
	}

	lbs_deb_enter_args(LBS_DEB_CMD, "ret %d", ret);
	return ret;
}