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1// SPDX-License-Identifier: ISC
2/*
3 * Copyright (C) 2016 Felix Fietkau <nbd@nbd.name>
4 */
5
6#include <linux/module.h>
7#include "mt76.h"
8
9bool __mt76_poll(struct mt76_dev *dev, u32 offset, u32 mask, u32 val,
10 int timeout)
11{
12 u32 cur;
13
14 timeout /= 10;
15 do {
16 cur = __mt76_rr(dev, offset) & mask;
17 if (cur == val)
18 return true;
19
20 udelay(10);
21 } while (timeout-- > 0);
22
23 return false;
24}
25EXPORT_SYMBOL_GPL(__mt76_poll);
26
27bool ____mt76_poll_msec(struct mt76_dev *dev, u32 offset, u32 mask, u32 val,
28 int timeout, int tick)
29{
30 u32 cur;
31
32 timeout /= tick;
33 do {
34 cur = __mt76_rr(dev, offset) & mask;
35 if (cur == val)
36 return true;
37
38 usleep_range(1000 * tick, 2000 * tick);
39 } while (timeout-- > 0);
40
41 return false;
42}
43EXPORT_SYMBOL_GPL(____mt76_poll_msec);
44
45int mt76_wcid_alloc(u32 *mask, int size)
46{
47 int i, idx = 0, cur;
48
49 for (i = 0; i < DIV_ROUND_UP(size, 32); i++) {
50 idx = ffs(~mask[i]);
51 if (!idx)
52 continue;
53
54 idx--;
55 cur = i * 32 + idx;
56 if (cur >= size)
57 break;
58
59 mask[i] |= BIT(idx);
60 return cur;
61 }
62
63 return -1;
64}
65EXPORT_SYMBOL_GPL(mt76_wcid_alloc);
66
67int mt76_get_min_avg_rssi(struct mt76_dev *dev, bool ext_phy)
68{
69 struct mt76_wcid *wcid;
70 int i, j, min_rssi = 0;
71 s8 cur_rssi;
72
73 local_bh_disable();
74 rcu_read_lock();
75
76 for (i = 0; i < ARRAY_SIZE(dev->wcid_mask); i++) {
77 u32 mask = dev->wcid_mask[i];
78 u32 phy_mask = dev->wcid_phy_mask[i];
79
80 if (!mask)
81 continue;
82
83 for (j = i * 32; mask; j++, mask >>= 1, phy_mask >>= 1) {
84 if (!(mask & 1))
85 continue;
86
87 if (!!(phy_mask & 1) != ext_phy)
88 continue;
89
90 wcid = rcu_dereference(dev->wcid[j]);
91 if (!wcid)
92 continue;
93
94 spin_lock(&dev->rx_lock);
95 if (wcid->inactive_count++ < 5)
96 cur_rssi = -ewma_signal_read(&wcid->rssi);
97 else
98 cur_rssi = 0;
99 spin_unlock(&dev->rx_lock);
100
101 if (cur_rssi < min_rssi)
102 min_rssi = cur_rssi;
103 }
104 }
105
106 rcu_read_unlock();
107 local_bh_enable();
108
109 return min_rssi;
110}
111EXPORT_SYMBOL_GPL(mt76_get_min_avg_rssi);
112
113int __mt76_worker_fn(void *ptr)
114{
115 struct mt76_worker *w = ptr;
116
117 while (!kthread_should_stop()) {
118 set_current_state(TASK_INTERRUPTIBLE);
119
120 if (kthread_should_park()) {
121 kthread_parkme();
122 continue;
123 }
124
125 if (!test_and_clear_bit(MT76_WORKER_SCHEDULED, &w->state)) {
126 schedule();
127 continue;
128 }
129
130 set_bit(MT76_WORKER_RUNNING, &w->state);
131 set_current_state(TASK_RUNNING);
132 w->fn(w);
133 cond_resched();
134 clear_bit(MT76_WORKER_RUNNING, &w->state);
135 }
136
137 return 0;
138}
139EXPORT_SYMBOL_GPL(__mt76_worker_fn);
140
141MODULE_DESCRIPTION("MediaTek MT76x helpers");
142MODULE_LICENSE("Dual BSD/GPL");
1/*
2 * Copyright (C) 2016 Felix Fietkau <nbd@nbd.name>
3 *
4 * Permission to use, copy, modify, and/or distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
7 *
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15 */
16
17#include <linux/module.h>
18#include "mt76.h"
19
20bool __mt76_poll(struct mt76_dev *dev, u32 offset, u32 mask, u32 val,
21 int timeout)
22{
23 u32 cur;
24
25 timeout /= 10;
26 do {
27 cur = dev->bus->rr(dev, offset) & mask;
28 if (cur == val)
29 return true;
30
31 udelay(10);
32 } while (timeout-- > 0);
33
34 return false;
35}
36EXPORT_SYMBOL_GPL(__mt76_poll);
37
38bool __mt76_poll_msec(struct mt76_dev *dev, u32 offset, u32 mask, u32 val,
39 int timeout)
40{
41 u32 cur;
42
43 timeout /= 10;
44 do {
45 cur = dev->bus->rr(dev, offset) & mask;
46 if (cur == val)
47 return true;
48
49 usleep_range(10000, 20000);
50 } while (timeout-- > 0);
51
52 return false;
53}
54EXPORT_SYMBOL_GPL(__mt76_poll_msec);
55
56int mt76_wcid_alloc(unsigned long *mask, int size)
57{
58 int i, idx = 0, cur;
59
60 for (i = 0; i < size / BITS_PER_LONG; i++) {
61 idx = ffs(~mask[i]);
62 if (!idx)
63 continue;
64
65 idx--;
66 cur = i * BITS_PER_LONG + idx;
67 if (cur >= size)
68 break;
69
70 mask[i] |= BIT(idx);
71 return cur;
72 }
73
74 return -1;
75}
76EXPORT_SYMBOL_GPL(mt76_wcid_alloc);
77
78MODULE_LICENSE("Dual BSD/GPL");