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