1 files changed, 109 insertions, 0 deletions
diff --git a/drivers/net/wireless/mediatek/mt76/util.c b/drivers/net/wireless/mediatek/mt76/util.c
new file mode 100644
index 0000000..23d1e1d
--- /dev/null
+++ b/drivers/net/wireless/mediatek/mt76/util.c
@@ -0,0 +1,109 @@
+// SPDX-License-Identifier: ISC
+/*
+ * Copyright (C) 2016 Felix Fietkau <nbd@nbd.name>
+ */
+
+#include <linux/module.h>
+#include "mt76.h"
+
+bool __mt76_poll(struct mt76_dev *dev, u32 offset, u32 mask, u32 val,
+		 int timeout)
+{
+	u32 cur;
+
+	timeout /= 10;
+	do {
+		cur = dev->bus->rr(dev, offset) & mask;
+		if (cur == val)
+			return true;
+
+		udelay(10);
+	} while (timeout-- > 0);
+
+	return false;
+}
+EXPORT_SYMBOL_GPL(__mt76_poll);
+
+bool __mt76_poll_msec(struct mt76_dev *dev, u32 offset, u32 mask, u32 val,
+		      int timeout)
+{
+	u32 cur;
+
+	timeout /= 10;
+	do {
+		cur = dev->bus->rr(dev, offset) & mask;
+		if (cur == val)
+			return true;
+
+		usleep_range(10000, 20000);
+	} while (timeout-- > 0);
+
+	return false;
+}
+EXPORT_SYMBOL_GPL(__mt76_poll_msec);
+
+int mt76_wcid_alloc(unsigned long *mask, int size)
+{
+	int i, idx = 0, cur;
+
+	for (i = 0; i < size / BITS_PER_LONG; i++) {
+		idx = ffs(~mask[i]);
+		if (!idx)
+			continue;
+
+		idx--;
+		cur = i * BITS_PER_LONG + idx;
+		if (cur >= size)
+			break;
+
+		mask[i] |= BIT(idx);
+		return cur;
+	}
+
+	return -1;
+}
+EXPORT_SYMBOL_GPL(mt76_wcid_alloc);
+
+int mt76_get_min_avg_rssi(struct mt76_dev *dev)
+{
+	struct mt76_wcid *wcid;
+	int i, j, min_rssi = 0;
+	s8 cur_rssi;
+
+	local_bh_disable();
+	rcu_read_lock();
+
+	for (i = 0; i < ARRAY_SIZE(dev->wcid_mask); i++) {
+		unsigned long mask = dev->wcid_mask[i];
+
+		if (!mask)
+			continue;
+
+		for (j = i * BITS_PER_LONG; mask; j++, mask >>= 1) {
+			if (!(mask & 1))
+				continue;
+
+			wcid = rcu_dereference(dev->wcid[j]);
+			if (!wcid)
+				continue;
+
+			spin_lock(&dev->rx_lock);
+			if (wcid->inactive_count++ < 5)
+				cur_rssi = -ewma_signal_read(&wcid->rssi);
+			else
+				cur_rssi = 0;
+			spin_unlock(&dev->rx_lock);
+
+			if (cur_rssi < min_rssi)
+				min_rssi = cur_rssi;
+		}
+	}
+
+	rcu_read_unlock();
+	local_bh_enable();
+
+	return min_rssi;
+}
+EXPORT_SYMBOL_GPL(mt76_get_min_avg_rssi);
+
+MODULE_LICENSE("Dual BSD/GPL");