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
9void 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}
46EXPORT_SYMBOL_GPL(mt76x2_mac_stop);
47