1 files changed, 54 insertions, 0 deletions
diff --git a/drivers/net/wireless/mediatek/mt76/mt76x2/mac.c b/drivers/net/wireless/mediatek/mt76/mt76x2/mac.c
new file mode 100644
index 000000000000..e25905c91ee2
--- /dev/null
+++ b/drivers/net/wireless/mediatek/mt76/mt76x2/mac.c
@@ -0,0 +1,54 @@
+/*
+ * Copyright (C) 2016 Felix Fietkau <nbd@nbd.name>
+ * Copyright (C) 2018 Lorenzo Bianconi <lorenzo.bianconi83@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.
+ */
+
+#include "mt76x2.h"
+
+void mt76x2_mac_stop(struct mt76x02_dev *dev, bool force)
+{
+	bool stopped = false;
+	u32 rts_cfg;
+	int i;
+
+	mt76_wr(dev, MT_MAC_SYS_CTRL, 0);
+
+	rts_cfg = mt76_rr(dev, MT_TX_RTS_CFG);
+	mt76_wr(dev, MT_TX_RTS_CFG, rts_cfg & ~MT_TX_RTS_CFG_RETRY_LIMIT);
+
+	/* Wait for MAC to become idle */
+	for (i = 0; i < 300; i++) {
+		if ((mt76_rr(dev, MT_MAC_STATUS) &
+		     (MT_MAC_STATUS_RX | MT_MAC_STATUS_TX)) ||
+		    mt76_rr(dev, MT_BBP(IBI, 12))) {
+			udelay(1);
+			continue;
+		}
+
+		stopped = true;
+		break;
+	}
+
+	if (force && !stopped) {
+		mt76_set(dev, MT_BBP(CORE, 4), BIT(1));
+		mt76_clear(dev, MT_BBP(CORE, 4), BIT(1));
+
+		mt76_set(dev, MT_BBP(CORE, 4), BIT(0));
+		mt76_clear(dev, MT_BBP(CORE, 4), BIT(0));
+	}
+
+	mt76_wr(dev, MT_TX_RTS_CFG, rts_cfg);
+}
+EXPORT_SYMBOL_GPL(mt76x2_mac_stop);