162306a36Sopenharmony_ci// SPDX-License-Identifier: ISC 262306a36Sopenharmony_ci/* 362306a36Sopenharmony_ci * Copyright (C) 2016 Felix Fietkau <nbd@nbd.name> 462306a36Sopenharmony_ci * Copyright (C) 2018 Lorenzo Bianconi <lorenzo.bianconi83@gmail.com> 562306a36Sopenharmony_ci */ 662306a36Sopenharmony_ci 762306a36Sopenharmony_ci#include "mt76x2.h" 862306a36Sopenharmony_ci 962306a36Sopenharmony_civoid mt76x2_mac_stop(struct mt76x02_dev *dev, bool force) 1062306a36Sopenharmony_ci{ 1162306a36Sopenharmony_ci bool stopped = false; 1262306a36Sopenharmony_ci u32 rts_cfg; 1362306a36Sopenharmony_ci int i; 1462306a36Sopenharmony_ci 1562306a36Sopenharmony_ci mt76_clear(dev, MT_TXOP_CTRL_CFG, MT_TXOP_ED_CCA_EN); 1662306a36Sopenharmony_ci mt76_clear(dev, MT_TXOP_HLDR_ET, MT_TXOP_HLDR_TX40M_BLK_EN); 1762306a36Sopenharmony_ci 1862306a36Sopenharmony_ci mt76_wr(dev, MT_MAC_SYS_CTRL, 0); 1962306a36Sopenharmony_ci 2062306a36Sopenharmony_ci rts_cfg = mt76_rr(dev, MT_TX_RTS_CFG); 2162306a36Sopenharmony_ci mt76_wr(dev, MT_TX_RTS_CFG, rts_cfg & ~MT_TX_RTS_CFG_RETRY_LIMIT); 2262306a36Sopenharmony_ci 2362306a36Sopenharmony_ci /* Wait for MAC to become idle */ 2462306a36Sopenharmony_ci for (i = 0; i < 300; i++) { 2562306a36Sopenharmony_ci if ((mt76_rr(dev, MT_MAC_STATUS) & 2662306a36Sopenharmony_ci (MT_MAC_STATUS_RX | MT_MAC_STATUS_TX)) || 2762306a36Sopenharmony_ci mt76_rr(dev, MT_BBP(IBI, 12))) { 2862306a36Sopenharmony_ci udelay(1); 2962306a36Sopenharmony_ci continue; 3062306a36Sopenharmony_ci } 3162306a36Sopenharmony_ci 3262306a36Sopenharmony_ci stopped = true; 3362306a36Sopenharmony_ci break; 3462306a36Sopenharmony_ci } 3562306a36Sopenharmony_ci 3662306a36Sopenharmony_ci if (force && !stopped) { 3762306a36Sopenharmony_ci mt76_set(dev, MT_BBP(CORE, 4), BIT(1)); 3862306a36Sopenharmony_ci mt76_clear(dev, MT_BBP(CORE, 4), BIT(1)); 3962306a36Sopenharmony_ci 4062306a36Sopenharmony_ci mt76_set(dev, MT_BBP(CORE, 4), BIT(0)); 4162306a36Sopenharmony_ci mt76_clear(dev, MT_BBP(CORE, 4), BIT(0)); 4262306a36Sopenharmony_ci } 4362306a36Sopenharmony_ci 4462306a36Sopenharmony_ci mt76_wr(dev, MT_TX_RTS_CFG, rts_cfg); 4562306a36Sopenharmony_ci} 4662306a36Sopenharmony_ciEXPORT_SYMBOL_GPL(mt76x2_mac_stop); 47