ath6kl: Invoke WOW suspend/resume calls during PM operation

Link ath6kl's wow suspend/resume functions with the actual suspend/resume path.

WOW mode is selected when the host sdio controller supports both
MMC_PM_KEEP_POWER and MMC_PM_WAKE_SDIO_IRQ capabilities.

kvalo: also adds a missing break in ath6kl_cfg80211_resume(), luckily
it didn't have any effect on functionality.
Signed-off-by: Raja Mani <rmani@qca.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

drivers/net/wireless/ath/ath6kl/cfg80211.c

@@ -1760,6 +1760,21 @@ int ath6kl_cfg80211_suspend(struct ath6kl *ar,
 	int ret;
 
 	switch (mode) {
+	case ATH6KL_CFG_SUSPEND_WOW:
+
+		ath6kl_dbg(ATH6KL_DBG_SUSPEND, "wow mode suspend\n");
+
+		/* Flush all non control pkts in TX path */
+		ath6kl_tx_data_cleanup(ar);
+
+		ret = ath6kl_wow_suspend(ar, wow);
+		if (ret) {
+			ath6kl_err("wow suspend failed: %d\n", ret);
+			return ret;
+		}
+		ar->state = ATH6KL_STATE_WOW;
+		break;
+
 	case ATH6KL_CFG_SUSPEND_DEEPSLEEP:
 
 		ath6kl_cfg80211_stop(ar);
@@ -1811,6 +1826,18 @@ int ath6kl_cfg80211_resume(struct ath6kl *ar)
 	int ret;
 
 	switch (ar->state) {
+	case  ATH6KL_STATE_WOW:
+		ath6kl_dbg(ATH6KL_DBG_SUSPEND, "wow mode resume\n");
+
+		ret = ath6kl_wow_resume(ar);
+		if (ret) {
+			ath6kl_warn("wow mode resume failed: %d\n", ret);
+			return ret;
+		}
+
+		ar->state = ATH6KL_STATE_ON;
+		break;
+
 	case ATH6KL_STATE_DEEPSLEEP:
 		if (ar->wmi->pwr_mode != ar->wmi->saved_pwr_mode) {
 			ret = ath6kl_wmi_powermode_cmd(ar->wmi, 0,
@@ -1833,6 +1860,7 @@ int ath6kl_cfg80211_resume(struct ath6kl *ar)
 			ath6kl_warn("Failed to boot hw in resume: %d\n", ret);
 			return ret;
 		}
+		break;
 
 	default:
 		break;

drivers/net/wireless/ath/ath6kl/sdio.c

@@ -798,6 +798,23 @@ static int ath6kl_sdio_suspend(struct ath6kl *ar, struct cfg80211_wowlan *wow)
 		return ret;
 	}
 
+	if ((flags & MMC_PM_WAKE_SDIO_IRQ) && wow) {
+		/*
+		 * The host sdio controller is capable of keep power and
+		 * sdio irq wake up at this point. It's fine to continue
+		 * wow suspend operation.
+		 */
+		ret = ath6kl_cfg80211_suspend(ar, ATH6KL_CFG_SUSPEND_WOW, wow);
+		if (ret)
+			return ret;
+
+		ret = sdio_set_host_pm_flags(func, MMC_PM_WAKE_SDIO_IRQ);
+		if (ret)
+			ath6kl_err("set sdio wake irq flag failed: %d\n", ret);
+
+		return ret;
+	}
+
 	return ath6kl_cfg80211_suspend(ar, ATH6KL_CFG_SUSPEND_DEEPSLEEP, NULL);
 }
 
@@ -820,6 +837,9 @@ static int ath6kl_sdio_resume(struct ath6kl *ar)
 
 	case ATH6KL_STATE_DEEPSLEEP:
 		break;
+
+	case ATH6KL_STATE_WOW:
+		break;
 	}
 
 	ath6kl_cfg80211_resume(ar);