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 = (struct wcn36xx_vif *)vif->drv_priv;
  26         /* TODO: Make sure the TX chain clean */
  27         ret = wcn36xx_smd_enter_bmps(wcn, vif);
  28         if (!ret) {
  29                 wcn36xx_dbg(WCN36XX_DBG_PMC, "Entered BMPS\n");
  30                 vif_priv->pw_state = WCN36XX_BMPS;
  31         } else {
  32                 /*
  33                  * One of the reasons why HW will not enter BMPS is because
  34                  * driver is trying to enter bmps before first beacon was
  35                  * received just after auth complete
  36                  */
  37                 wcn36xx_err("Can not enter BMPS!\n");
  38         }
  39         return ret;
  40 }
  41
  42 int wcn36xx_pmc_exit_bmps_state(struct wcn36xx *wcn,
  43                                 struct ieee80211_vif *vif)
  44 {
  45         struct wcn36xx_vif *vif_priv = (struct wcn36xx_vif *)vif->drv_priv;
  46
  47         if (WCN36XX_BMPS != vif_priv->pw_state) {
  48                 wcn36xx_err("Not in BMPS mode, no need to exit from BMPS mode!\n");
  49                 return -EINVAL;
  50         }
  51         wcn36xx_smd_exit_bmps(wcn, vif);
  52         vif_priv->pw_state = WCN36XX_FULL_POWER;
  53         return 0;
  54 }
  55
  56 int wcn36xx_enable_keep_alive_null_packet(struct wcn36xx *wcn,
  57                                           struct ieee80211_vif *vif)
  58 {
  59         wcn36xx_dbg(WCN36XX_DBG_PMC, "%s\n", __func__);
  60         return wcn36xx_smd_keep_alive_req(wcn, vif,
  61                                           WCN36XX_HAL_KEEP_ALIVE_NULL_PKT);
  62 }