75 lines · c
1/*2 * Copyright (c) 2013 Eugene Krasnikov <k.eugene.e@gmail.com>3 *4 * Permission to use, copy, modify, and/or distribute this software for any5 * purpose with or without fee is hereby granted, provided that the above6 * copyright notice and this permission notice appear in all copies.7 *8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY11 * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION13 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN14 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.15 */16 17#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt18 19#include "wcn36xx.h"20 21#define WCN36XX_BMPS_FAIL_THREHOLD 322 23int wcn36xx_pmc_enter_bmps_state(struct wcn36xx *wcn,24 struct ieee80211_vif *vif)25{26 int ret = 0;27 struct wcn36xx_vif *vif_priv = wcn36xx_vif_to_priv(vif);28 /* TODO: Make sure the TX chain clean */29 ret = wcn36xx_smd_enter_bmps(wcn, vif);30 if (!ret) {31 wcn36xx_dbg(WCN36XX_DBG_PMC, "Entered BMPS\n");32 vif_priv->pw_state = WCN36XX_BMPS;33 vif_priv->bmps_fail_ct = 0;34 vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER;35 } else {36 /*37 * One of the reasons why HW will not enter BMPS is because38 * driver is trying to enter bmps before first beacon was39 * received just after auth complete40 */41 wcn36xx_err("Can not enter BMPS!\n");42 43 if (vif_priv->bmps_fail_ct++ == WCN36XX_BMPS_FAIL_THREHOLD) {44 ieee80211_connection_loss(vif);45 vif_priv->bmps_fail_ct = 0;46 }47 }48 return ret;49}50 51int wcn36xx_pmc_exit_bmps_state(struct wcn36xx *wcn,52 struct ieee80211_vif *vif)53{54 struct wcn36xx_vif *vif_priv = wcn36xx_vif_to_priv(vif);55 56 if (WCN36XX_BMPS != vif_priv->pw_state) {57 /* Unbalanced call or last BMPS enter failed */58 wcn36xx_dbg(WCN36XX_DBG_PMC,59 "Not in BMPS mode, no need to exit\n");60 return -EALREADY;61 }62 wcn36xx_smd_exit_bmps(wcn, vif);63 vif_priv->pw_state = WCN36XX_FULL_POWER;64 vif->driver_flags &= ~IEEE80211_VIF_BEACON_FILTER;65 return 0;66}67 68int wcn36xx_enable_keep_alive_null_packet(struct wcn36xx *wcn,69 struct ieee80211_vif *vif)70{71 wcn36xx_dbg(WCN36XX_DBG_PMC, "%s\n", __func__);72 return wcn36xx_smd_keep_alive_req(wcn, vif,73 WCN36XX_HAL_KEEP_ALIVE_NULL_PKT);74}75