1*4882a593Smuzhiyun // SPDX-License-Identifier: ISC
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Copyright (C) 2016 Felix Fietkau <nbd@nbd.name>
4*4882a593Smuzhiyun * Copyright (C) 2018 Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>
5*4882a593Smuzhiyun */
6*4882a593Smuzhiyun
7*4882a593Smuzhiyun #include "mt76x2.h"
8*4882a593Smuzhiyun
mt76x2_mac_stop(struct mt76x02_dev * dev,bool force)9*4882a593Smuzhiyun void mt76x2_mac_stop(struct mt76x02_dev *dev, bool force)
10*4882a593Smuzhiyun {
11*4882a593Smuzhiyun bool stopped = false;
12*4882a593Smuzhiyun u32 rts_cfg;
13*4882a593Smuzhiyun int i;
14*4882a593Smuzhiyun
15*4882a593Smuzhiyun mt76_clear(dev, MT_TXOP_CTRL_CFG, MT_TXOP_ED_CCA_EN);
16*4882a593Smuzhiyun mt76_clear(dev, MT_TXOP_HLDR_ET, MT_TXOP_HLDR_TX40M_BLK_EN);
17*4882a593Smuzhiyun
18*4882a593Smuzhiyun mt76_wr(dev, MT_MAC_SYS_CTRL, 0);
19*4882a593Smuzhiyun
20*4882a593Smuzhiyun rts_cfg = mt76_rr(dev, MT_TX_RTS_CFG);
21*4882a593Smuzhiyun mt76_wr(dev, MT_TX_RTS_CFG, rts_cfg & ~MT_TX_RTS_CFG_RETRY_LIMIT);
22*4882a593Smuzhiyun
23*4882a593Smuzhiyun /* Wait for MAC to become idle */
24*4882a593Smuzhiyun for (i = 0; i < 300; i++) {
25*4882a593Smuzhiyun if ((mt76_rr(dev, MT_MAC_STATUS) &
26*4882a593Smuzhiyun (MT_MAC_STATUS_RX | MT_MAC_STATUS_TX)) ||
27*4882a593Smuzhiyun mt76_rr(dev, MT_BBP(IBI, 12))) {
28*4882a593Smuzhiyun udelay(1);
29*4882a593Smuzhiyun continue;
30*4882a593Smuzhiyun }
31*4882a593Smuzhiyun
32*4882a593Smuzhiyun stopped = true;
33*4882a593Smuzhiyun break;
34*4882a593Smuzhiyun }
35*4882a593Smuzhiyun
36*4882a593Smuzhiyun if (force && !stopped) {
37*4882a593Smuzhiyun mt76_set(dev, MT_BBP(CORE, 4), BIT(1));
38*4882a593Smuzhiyun mt76_clear(dev, MT_BBP(CORE, 4), BIT(1));
39*4882a593Smuzhiyun
40*4882a593Smuzhiyun mt76_set(dev, MT_BBP(CORE, 4), BIT(0));
41*4882a593Smuzhiyun mt76_clear(dev, MT_BBP(CORE, 4), BIT(0));
42*4882a593Smuzhiyun }
43*4882a593Smuzhiyun
44*4882a593Smuzhiyun mt76_wr(dev, MT_TX_RTS_CFG, rts_cfg);
45*4882a593Smuzhiyun }
46*4882a593Smuzhiyun EXPORT_SYMBOL_GPL(mt76x2_mac_stop);
47