| 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 | |
|---|
