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 = wcn36xx_vif_to_priv(vif);
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 = wcn36xx_vif_to_priv(vif);
46 
47 	if (WCN36XX_BMPS != vif_priv->pw_state) {
48 		/* Unbalanced call or last BMPS enter failed */
49 		wcn36xx_dbg(WCN36XX_DBG_PMC,
50 			    "Not in BMPS mode, no need to exit\n");
51 		return -EALREADY;
52 	}
53 	wcn36xx_smd_exit_bmps(wcn, vif);
54 	vif_priv->pw_state = WCN36XX_FULL_POWER;
55 	return 0;
56 }
57 
58 int wcn36xx_enable_keep_alive_null_packet(struct wcn36xx *wcn,
59 					  struct ieee80211_vif *vif)
60 {
61 	wcn36xx_dbg(WCN36XX_DBG_PMC, "%s\n", __func__);
62 	return wcn36xx_smd_keep_alive_req(wcn, vif,
63 					  WCN36XX_HAL_KEEP_ALIVE_NULL_PKT);
64 }
65