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 #define WCN36XX_BMPS_FAIL_THREHOLD 3 22 23 int 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 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 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 51 int 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 68 int 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