drivers/net/wireless/ath/wcn36xx/pmc.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 any
   5  * purpose with or without fee is hereby granted, provided that the above
   6  * copyright notice and this permission notice appear in all copies.
   7  *
   8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
  11  * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
  13  * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
  14  * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  15  */
  16
  17 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  18
  19 #include "wcn36xx.h"
  20
  21 int wcn36xx_pmc_enter_bmps_state(struct wcn36xx *wcn,
  22                                  struct ieee80211_vif *vif)
  23 {
  24         int ret = 0;
  25         struct wcn36xx_vif *vif_priv = wcn36xx_vif_to_priv(vif);
  26
  27         if (!vif_priv->allow_bmps)
  28                 return -ENOTSUPP;
  29
  30         ret = wcn36xx_smd_enter_bmps(wcn, vif);
  31         if (!ret) {
  32                 wcn36xx_dbg(WCN36XX_DBG_PMC, "Entered BMPS\n");
  33                 vif_priv->pw_state = WCN36XX_BMPS;
  34                 vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER;
  35         } else {
  36                 /*
  37                  * One of the reasons why HW will not enter BMPS is because
  38                  * driver is trying to enter bmps before first beacon was
  39                  * received just after auth complete
  40                  */
  41                 wcn36xx_err("Can not enter BMPS!\n");
  42         }
  43         return ret;
  44 }
  45
  46 int wcn36xx_pmc_exit_bmps_state(struct wcn36xx *wcn,
  47                                 struct ieee80211_vif *vif)
  48 {
  49         struct wcn36xx_vif *vif_priv = wcn36xx_vif_to_priv(vif);
  50
  51         if (WCN36XX_BMPS != vif_priv->pw_state) {
  52                 /* Unbalanced call or last BMPS enter failed */
  53                 wcn36xx_dbg(WCN36XX_DBG_PMC,
  54                             "Not in BMPS mode, no need to exit\n");
  55                 return -EALREADY;
  56         }
  57         wcn36xx_smd_exit_bmps(wcn, vif);
  58         vif_priv->pw_state = WCN36XX_FULL_POWER;
  59         vif->driver_flags &= ~IEEE80211_VIF_BEACON_FILTER;
  60         return 0;
  61 }
  62
  63 int wcn36xx_enable_keep_alive_null_packet(struct wcn36xx *wcn,
  64                                           struct ieee80211_vif *vif)
  65 {
  66         wcn36xx_dbg(WCN36XX_DBG_PMC, "%s\n", __func__);
  67         return wcn36xx_smd_keep_alive_req(wcn, vif,
  68                                           WCN36XX_HAL_KEEP_ALIVE_NULL_PKT);
  69 }