/* * Copyright (C) 2016 Felix Fietkau <nbd@nbd.name> * Copyright (C) 2018 Lorenzo Bianconi <lorenzo.bianconi83@gmail.com> * * Permission to use, copy, modify, and/or distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #include "mt76x2.h" void mt76x2_mac_stop(struct mt76x02_dev *dev, bool force) { bool stopped = false; u32 rts_cfg; int i; mt76_wr(dev, MT_MAC_SYS_CTRL, 0); rts_cfg = mt76_rr(dev, MT_TX_RTS_CFG); mt76_wr(dev, MT_TX_RTS_CFG, rts_cfg & ~MT_TX_RTS_CFG_RETRY_LIMIT); /* Wait for MAC to become idle */ for (i = 0; i < 300; i++) { if ((mt76_rr(dev, MT_MAC_STATUS) & (MT_MAC_STATUS_RX | MT_MAC_STATUS_TX)) || mt76_rr(dev, MT_BBP(IBI, 12))) { udelay(1); continue; } stopped = true; break; } if (force && !stopped) { mt76_set(dev, MT_BBP(CORE, 4), BIT(1)); mt76_clear(dev, MT_BBP(CORE, 4), BIT(1)); mt76_set(dev, MT_BBP(CORE, 4), BIT(0)); mt76_clear(dev, MT_BBP(CORE, 4), BIT(0)); } mt76_wr(dev, MT_TX_RTS_CFG, rts_cfg); } EXPORT_SYMBOL_GPL(mt76x2_mac_stop);