LXR linux/drivers/net/wireless/ath/ath11k/wow.c

   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}
  74