1 files changed, 74 insertions, 0 deletions
diff --git a/drivers/net/wireless/ath/wcn36xx/pmc.c b/drivers/net/wireless/ath/wcn36xx/pmc.c
new file mode 100644
index 000000000..2c660458b
--- /dev/null
+++ b/drivers/net/wireless/ath/wcn36xx/pmc.c
@@ -0,0 +1,74 @@
+/*
+ * Copyright (c) 2013 Eugene Krasnikov <k.eugene.e@gmail.com>
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+ * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
+ * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+ * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include "wcn36xx.h"
+
+#define WCN36XX_BMPS_FAIL_THREHOLD 3
+
+int wcn36xx_pmc_enter_bmps_state(struct wcn36xx *wcn,
+				 struct ieee80211_vif *vif)
+{
+	int ret = 0;
+	struct wcn36xx_vif *vif_priv = wcn36xx_vif_to_priv(vif);
+	/* TODO: Make sure the TX chain clean */
+	ret = wcn36xx_smd_enter_bmps(wcn, vif);
+	if (!ret) {
+		wcn36xx_dbg(WCN36XX_DBG_PMC, "Entered BMPS\n");
+		vif_priv->pw_state = WCN36XX_BMPS;
+		vif_priv->bmps_fail_ct = 0;
+		vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER;
+	} else {
+		/*
+		 * One of the reasons why HW will not enter BMPS is because
+		 * driver is trying to enter bmps before first beacon was
+		 * received just after auth complete
+		 */
+		wcn36xx_err("Can not enter BMPS!\n");
+
+		if (vif_priv->bmps_fail_ct++ == WCN36XX_BMPS_FAIL_THREHOLD) {
+			ieee80211_connection_loss(vif);
+			vif_priv->bmps_fail_ct = 0;
+		}
+	}
+	return ret;
+}
+
+int wcn36xx_pmc_exit_bmps_state(struct wcn36xx *wcn,
+				struct ieee80211_vif *vif)
+{
+	struct wcn36xx_vif *vif_priv = wcn36xx_vif_to_priv(vif);
+
+	if (WCN36XX_BMPS != vif_priv->pw_state) {
+		/* Unbalanced call or last BMPS enter failed */
+		wcn36xx_dbg(WCN36XX_DBG_PMC,
+			    "Not in BMPS mode, no need to exit\n");
+		return -EALREADY;
+	}
+	wcn36xx_smd_exit_bmps(wcn, vif);
+	vif_priv->pw_state = WCN36XX_FULL_POWER;
+	vif->driver_flags &= ~IEEE80211_VIF_BEACON_FILTER;
+	return 0;
+}
+
+int wcn36xx_enable_keep_alive_null_packet(struct wcn36xx *wcn,
+					  struct ieee80211_vif *vif)
+{
+	wcn36xx_dbg(WCN36XX_DBG_PMC, "%s\n", __func__);
+	return wcn36xx_smd_keep_alive_req(wcn, vif,
+					  WCN36XX_HAL_KEEP_ALIVE_NULL_PKT);
+}