1// SPDX-License-Identifier: BSD-3-Clause-Clear
 2/*
 3 * Copyright (c) 2020 The Linux Foundation. All rights reserved.
 4 */
 5
 6#include <linux/delay.h>
 7
 8#include "mac.h"
 9#include "core.h"
10#include "hif.h"
11#include "debug.h"
12#include "wmi.h"
13#include "wow.h"
14
15int ath11k_wow_enable(struct ath11k_base *ab)
16{
17	struct ath11k *ar = ath11k_ab_to_ar(ab, 0);
18	int i, ret;
19
20	clear_bit(ATH11K_FLAG_HTC_SUSPEND_COMPLETE, &ab->dev_flags);
21
22	for (i = 0; i < ATH11K_WOW_RETRY_NUM; i++) {
23		reinit_completion(&ab->htc_suspend);
24
25		ret = ath11k_wmi_wow_enable(ar);
26		if (ret) {
27			ath11k_warn(ab, "failed to issue wow enable: %d\n", ret);
28			return ret;
29		}
30
31		ret = wait_for_completion_timeout(&ab->htc_suspend, 3 * HZ);
32		if (ret == 0) {
33			ath11k_warn(ab,
34				    "timed out while waiting for htc suspend completion\n");
35			return -ETIMEDOUT;
36		}
37
38		if (test_bit(ATH11K_FLAG_HTC_SUSPEND_COMPLETE, &ab->dev_flags))
39			/* success, suspend complete received */
40			return 0;
41
42		ath11k_warn(ab, "htc suspend not complete, retrying (try %d)\n",
43			    i);
44		msleep(ATH11K_WOW_RETRY_WAIT_MS);
45	}
46
47	ath11k_warn(ab, "htc suspend not complete, failing after %d tries\n", i);
48
49	return -ETIMEDOUT;
50}
51
52int ath11k_wow_wakeup(struct ath11k_base *ab)
53{
54	struct ath11k *ar = ath11k_ab_to_ar(ab, 0);
55	int ret;
56
57	reinit_completion(&ab->wow.wakeup_completed);
58
59	ret = ath11k_wmi_wow_host_wakeup_ind(ar);
60	if (ret) {
61		ath11k_warn(ab, "failed to send wow wakeup indication: %d\n",
62			    ret);
63		return ret;
64	}
65
66	ret = wait_for_completion_timeout(&ab->wow.wakeup_completed, 3 * HZ);
67	if (ret == 0) {
68		ath11k_warn(ab, "timed out while waiting for wow wakeup completion\n");
69		return -ETIMEDOUT;
70	}
71
72	return 0;
73}