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/*
* Copyright (C) 2016 Felix Fietkau <nbd@nbd.name>
*
* 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 <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");
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