2 * Copyright (C) 2016 Felix Fietkau <nbd@nbd.name>
3 * Copyright (C) 2018 Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>
5 * Permission to use, copy, modify, and/or distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
18 #include <linux/kernel.h>
21 #include "mt76x02_dma.h"
22 #include "mt76x02_regs.h"
24 void mt76x02_dma_enable(struct mt76_dev *dev)
28 __mt76_wr(dev, MT_MAC_SYS_CTRL, MT_MAC_SYS_CTRL_ENABLE_TX);
29 mt76x02_wait_for_wpdma(dev, 1000);
30 usleep_range(50, 100);
32 val = FIELD_PREP(MT_WPDMA_GLO_CFG_DMA_BURST_SIZE, 3) |
33 MT_WPDMA_GLO_CFG_TX_DMA_EN |
34 MT_WPDMA_GLO_CFG_RX_DMA_EN;
35 __mt76_set(dev, MT_WPDMA_GLO_CFG, val);
36 __mt76_clear(dev, MT_WPDMA_GLO_CFG,
37 MT_WPDMA_GLO_CFG_TX_WRITEBACK_DONE);
39 EXPORT_SYMBOL_GPL(mt76x02_dma_enable);
41 void mt76x02_dma_disable(struct mt76_dev *dev)
43 u32 val = __mt76_rr(dev, MT_WPDMA_GLO_CFG);
45 val &= MT_WPDMA_GLO_CFG_DMA_BURST_SIZE |
46 MT_WPDMA_GLO_CFG_BIG_ENDIAN |
47 MT_WPDMA_GLO_CFG_HDR_SEG_LEN;
48 val |= MT_WPDMA_GLO_CFG_TX_WRITEBACK_DONE;
49 __mt76_wr(dev, MT_WPDMA_GLO_CFG, val);
51 EXPORT_SYMBOL_GPL(mt76x02_dma_disable);