/*
 * Copyright (c) 2013 Eugene Krasnikov <k.eugene.e@gmail.com>
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
 * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include "wcn36xx.h"

#define WCN36XX_BMPS_FAIL_THREHOLD 3

int wcn36xx_pmc_enter_bmps_state(struct wcn36xx *wcn,
                                 struct ieee80211_vif *vif)
{
        int ret = 0;
        struct wcn36xx_vif *vif_priv = wcn36xx_vif_to_priv(vif);
        /* TODO: Make sure the TX chain clean */
        ret = wcn36xx_smd_enter_bmps(wcn, vif);
        if (!ret) {
                wcn36xx_dbg(WCN36XX_DBG_PMC, "Entered BMPS\n");
                vif_priv->pw_state = WCN36XX_BMPS;
                vif_priv->bmps_fail_ct = 0;
                vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER;
        } else {
                /*
                 * One of the reasons why HW will not enter BMPS is because
                 * driver is trying to enter bmps before first beacon was
                 * received just after auth complete
                 */
                wcn36xx_err("Can not enter BMPS!\n");

                if (vif_priv->bmps_fail_ct++ == WCN36XX_BMPS_FAIL_THREHOLD) {
                        ieee80211_connection_loss(vif);
                        vif_priv->bmps_fail_ct = 0;
                }
        }
        return ret;
}

int wcn36xx_pmc_exit_bmps_state(struct wcn36xx *wcn,
                                struct ieee80211_vif *vif)
{
        struct wcn36xx_vif *vif_priv = wcn36xx_vif_to_priv(vif);

        if (WCN36XX_BMPS != vif_priv->pw_state) {
                /* Unbalanced call or last BMPS enter failed */
                wcn36xx_dbg(WCN36XX_DBG_PMC,
                            "Not in BMPS mode, no need to exit\n");
                return -EALREADY;
        }
        wcn36xx_smd_exit_bmps(wcn, vif);
        vif_priv->pw_state = WCN36XX_FULL_POWER;
        vif->driver_flags &= ~IEEE80211_VIF_BEACON_FILTER;
        return 0;
}

int wcn36xx_enable_keep_alive_null_packet(struct wcn36xx *wcn,
                                          struct ieee80211_vif *vif)
{
        wcn36xx_dbg(WCN36XX_DBG_PMC, "%s\n", __func__);
        return wcn36xx_smd_keep_alive_req(wcn, vif,
                                          WCN36XX_HAL_KEEP_ALIVE_NULL_PKT);
}