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
wcn36xx_pmc_enter_bmps_state(struct wcn36xx * wcn,struct ieee80211_vif * vif)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
wcn36xx_pmc_exit_bmps_state(struct wcn36xx * wcn,struct ieee80211_vif * vif)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
wcn36xx_enable_keep_alive_null_packet(struct wcn36xx * wcn,struct ieee80211_vif * vif)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