1/*
 2 * Copyright (c) 2014 Qualcomm Atheros, Inc.
 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
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15 */
16
17#include "wil6210.h"
18
19int wil_can_suspend(struct wil6210_priv *wil, bool is_runtime)
20{
21	int rc = 0;
22	struct wireless_dev *wdev = wil->wdev;
23
24	wil_dbg_pm(wil, "%s(%s)\n", __func__,
25		   is_runtime ? "runtime" : "system");
26
27	switch (wdev->iftype) {
28	case NL80211_IFTYPE_MONITOR:
29	case NL80211_IFTYPE_STATION:
30	case NL80211_IFTYPE_P2P_CLIENT:
31		break;
32	/* AP-like interface - can't suspend */
33	default:
34		wil_dbg_pm(wil, "AP-like interface\n");
35		rc = -EBUSY;
36		break;
37	}
38
39	wil_dbg_pm(wil, "%s(%s) => %s (%d)\n", __func__,
40		   is_runtime ? "runtime" : "system", rc ? "No" : "Yes", rc);
41
42	return rc;
43}
44
45int wil_suspend(struct wil6210_priv *wil, bool is_runtime)
46{
47	int rc = 0;
48	struct net_device *ndev = wil_to_ndev(wil);
49
50	wil_dbg_pm(wil, "%s(%s)\n", __func__,
51		   is_runtime ? "runtime" : "system");
52
53	/* if netif up, hardware is alive, shut it down */
54	if (ndev->flags & IFF_UP) {
55		rc = wil_down(wil);
56		if (rc) {
57			wil_err(wil, "wil_down : %d\n", rc);
58			goto out;
59		}
60	}
61
62	if (wil->platform_ops.suspend)
63		rc = wil->platform_ops.suspend(wil->platform_handle);
64
65out:
66	wil_dbg_pm(wil, "%s(%s) => %d\n", __func__,
67		   is_runtime ? "runtime" : "system", rc);
68	return rc;
69}
70
71int wil_resume(struct wil6210_priv *wil, bool is_runtime)
72{
73	int rc = 0;
74	struct net_device *ndev = wil_to_ndev(wil);
75
76	wil_dbg_pm(wil, "%s(%s)\n", __func__,
77		   is_runtime ? "runtime" : "system");
78
79	if (wil->platform_ops.resume) {
80		rc = wil->platform_ops.resume(wil->platform_handle);
81		if (rc) {
82			wil_err(wil, "platform_ops.resume : %d\n", rc);
83			goto out;
84		}
85	}
86
87	/* if netif up, bring hardware up
88	 * During open(), IFF_UP set after actual device method
89	 * invocation. This prevent recursive call to wil_up()
90	 */
91	if (ndev->flags & IFF_UP)
92		rc = wil_up(wil);
93
94out:
95	wil_dbg_pm(wil, "%s(%s) => %d\n", __func__,
96		   is_runtime ? "runtime" : "system", rc);
97	return rc;
98}