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
21int 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
46int 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
63int 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}