drivers/net/wireless/mediatek/mt76/mmio.c

   1 // SPDX-License-Identifier: ISC
   2 /*
   3  * Copyright (C) 2016 Felix Fietkau <nbd@nbd.name>
   4  */
   5
   6 #include "mt76.h"
   7 #include "trace.h"
   8
   9 static u32 mt76_mmio_rr(struct mt76_dev *dev, u32 offset)
  10 {
  11         u32 val;
  12
  13         val = readl(dev->mmio.regs + offset);
  14         trace_reg_rr(dev, offset, val);
  15
  16         return val;
  17 }
  18
  19 static void mt76_mmio_wr(struct mt76_dev *dev, u32 offset, u32 val)
  20 {
  21         trace_reg_wr(dev, offset, val);
  22         writel(val, dev->mmio.regs + offset);
  23 }
  24
  25 static u32 mt76_mmio_rmw(struct mt76_dev *dev, u32 offset, u32 mask, u32 val)
  26 {
  27         val |= mt76_mmio_rr(dev, offset) & ~mask;
  28         mt76_mmio_wr(dev, offset, val);
  29         return val;
  30 }
  31
  32 static void mt76_mmio_write_copy(struct mt76_dev *dev, u32 offset,
  33                                  const void *data, int len)
  34 {
  35         __iowrite32_copy(dev->mmio.regs + offset, data, DIV_ROUND_UP(len, 4));
  36 }
  37
  38 static void mt76_mmio_read_copy(struct mt76_dev *dev, u32 offset,
  39                                 void *data, int len)
  40 {
  41         __ioread32_copy(data, dev->mmio.regs + offset, DIV_ROUND_UP(len, 4));
  42 }
  43
  44 static int mt76_mmio_wr_rp(struct mt76_dev *dev, u32 base,
  45                            const struct mt76_reg_pair *data, int len)
  46 {
  47         while (len > 0) {
  48                 mt76_mmio_wr(dev, data->reg, data->value);
  49                 data++;
  50                 len--;
  51         }
  52
  53         return 0;
  54 }
  55
  56 static int mt76_mmio_rd_rp(struct mt76_dev *dev, u32 base,
  57                            struct mt76_reg_pair *data, int len)
  58 {
  59         while (len > 0) {
  60                 data->value = mt76_mmio_rr(dev, data->reg);
  61                 data++;
  62                 len--;
  63         }
  64
  65         return 0;
  66 }
  67
  68 void mt76_set_irq_mask(struct mt76_dev *dev, u32 addr,
  69                        u32 clear, u32 set)
  70 {
  71         unsigned long flags;
  72
  73         spin_lock_irqsave(&dev->mmio.irq_lock, flags);
  74         dev->mmio.irqmask &= ~clear;
  75         dev->mmio.irqmask |= set;
  76         if (addr)
  77                 mt76_mmio_wr(dev, addr, dev->mmio.irqmask);
  78         spin_unlock_irqrestore(&dev->mmio.irq_lock, flags);
  79 }
  80 EXPORT_SYMBOL_GPL(mt76_set_irq_mask);
  81
  82 void mt76_mmio_init(struct mt76_dev *dev, void __iomem *regs)
  83 {
  84         static const struct mt76_bus_ops mt76_mmio_ops = {
  85                 .rr = mt76_mmio_rr,
  86                 .rmw = mt76_mmio_rmw,
  87                 .wr = mt76_mmio_wr,
  88                 .write_copy = mt76_mmio_write_copy,
  89                 .read_copy = mt76_mmio_read_copy,
  90                 .wr_rp = mt76_mmio_wr_rp,
  91                 .rd_rp = mt76_mmio_rd_rp,
  92                 .type = MT76_BUS_MMIO,
  93         };
  94
  95         dev->bus = &mt76_mmio_ops;
  96         dev->mmio.regs = regs;
  97
  98         spin_lock_init(&dev->mmio.irq_lock);
  99 }
 100 EXPORT_SYMBOL_GPL(mt76_mmio_init);