drivers/gpu/drm/nouveau/nvkm/subdev/bus/nv04.c

   1 /*
   2  * Copyright 2012 Nouveau Community
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included in
  12  * all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  20  * OTHER DEALINGS IN THE SOFTWARE.
  21  *
  22  * Authors: Martin Peres <martin.peres@labri.fr>
  23  *          Ben Skeggs
  24  */
  25 #include "priv.h"
  26
  27 #include <subdev/gpio.h>
  28
  29 static void
  30 nv04_bus_intr(struct nvkm_bus *bus)
  31 {
  32         struct nvkm_subdev *subdev = &bus->subdev;
  33         struct nvkm_device *device = subdev->device;
  34         u32 stat = nvkm_rd32(device, 0x001100) & nvkm_rd32(device, 0x001140);
  35
  36         if (stat & 0x00000001) {
  37                 nvkm_error(subdev, "BUS ERROR\n");
  38                 stat &= ~0x00000001;
  39                 nvkm_wr32(device, 0x001100, 0x00000001);
  40         }
  41
  42         if (stat & 0x00000110) {
  43                 struct nvkm_gpio *gpio = device->gpio;
  44                 if (gpio)
  45                         nvkm_subdev_intr(&gpio->subdev);
  46                 stat &= ~0x00000110;
  47                 nvkm_wr32(device, 0x001100, 0x00000110);
  48         }
  49
  50         if (stat) {
  51                 nvkm_error(subdev, "intr %08x\n", stat);
  52                 nvkm_mask(device, 0x001140, stat, 0x00000000);
  53         }
  54 }
  55
  56 static void
  57 nv04_bus_init(struct nvkm_bus *bus)
  58 {
  59         struct nvkm_device *device = bus->subdev.device;
  60         nvkm_wr32(device, 0x001100, 0xffffffff);
  61         nvkm_wr32(device, 0x001140, 0x00000111);
  62 }
  63
  64 static const struct nvkm_bus_func
  65 nv04_bus = {
  66         .init = nv04_bus_init,
  67         .intr = nv04_bus_intr,
  68 };
  69
  70 int
  71 nv04_bus_new(struct nvkm_device *device, int index, struct nvkm_bus **pbus)
  72 {
  73         return nvkm_bus_new_(&nv04_bus, device, index, pbus);
  74 }