1 /* 2 * Copyright (C) 2016 Felix Fietkau <nbd@nbd.name> 3 * 4 * Permission to use, copy, modify, and/or distribute this software for any 5 * purpose with or without fee is hereby granted, provided that the above 6 * copyright notice and this permission notice appear in all copies. 7 * 8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 15 */ 16 17 #include "mt76.h" 18 #include "trace.h" 19 20 static u32 mt76_mmio_rr(struct mt76_dev *dev, u32 offset) 21 { 22 u32 val; 23 24 val = ioread32(dev->regs + offset); 25 trace_reg_rr(dev, offset, val); 26 27 return val; 28 } 29 30 static void mt76_mmio_wr(struct mt76_dev *dev, u32 offset, u32 val) 31 { 32 trace_reg_wr(dev, offset, val); 33 iowrite32(val, dev->regs + offset); 34 } 35 36 static u32 mt76_mmio_rmw(struct mt76_dev *dev, u32 offset, u32 mask, u32 val) 37 { 38 val |= mt76_mmio_rr(dev, offset) & ~mask; 39 mt76_mmio_wr(dev, offset, val); 40 return val; 41 } 42 43 static void mt76_mmio_copy(struct mt76_dev *dev, u32 offset, const void *data, 44 int len) 45 { 46 __iowrite32_copy(dev->regs + offset, data, len >> 2); 47 } 48 49 void mt76_mmio_init(struct mt76_dev *dev, void __iomem *regs) 50 { 51 static const struct mt76_bus_ops mt76_mmio_ops = { 52 .rr = mt76_mmio_rr, 53 .rmw = mt76_mmio_rmw, 54 .wr = mt76_mmio_wr, 55 .copy = mt76_mmio_copy, 56 }; 57 58 dev->bus = &mt76_mmio_ops; 59 dev->regs = regs; 60 } 61 EXPORT_SYMBOL_GPL(mt76_mmio_init); 62