drivers/gpu/drm/nouveau/core/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
  26 #include <subdev/bus.h>
  27
  28 struct nv04_bus_priv {
  29         struct nouveau_bus base;
  30 };
  31
  32 void
  33 nv04_bus_intr(struct nouveau_subdev *subdev)
  34 {
  35         struct nouveau_bus *pbus = nouveau_bus(subdev);
  36         u32 stat = nv_rd32(pbus, 0x001100) & nv_rd32(pbus, 0x001140);
  37
  38         if (stat & 0x00000001) {
  39                 nv_error(pbus, "BUS ERROR\n");
  40                 stat &= ~0x00000001;
  41                 nv_wr32(pbus, 0x001100, 0x00000001);
  42         }
  43
  44         if (stat & 0x00000110) {
  45                 subdev = nouveau_subdev(subdev, NVDEV_SUBDEV_GPIO);
  46                 if (subdev && subdev->intr)
  47                         subdev->intr(subdev);
  48                 stat &= ~0x00000110;
  49                 nv_wr32(pbus, 0x001100, 0x00000110);
  50         }
  51
  52         if (stat) {
  53                 nv_error(pbus, "unknown intr 0x%08x\n", stat);
  54                 nv_mask(pbus, 0x001140, stat, 0x00000000);
  55         }
  56 }
  57
  58 static int
  59 nv04_bus_ctor(struct nouveau_object *parent, struct nouveau_object *engine,
  60               struct nouveau_oclass *oclass, void *data, u32 size,
  61               struct nouveau_object **pobject)
  62 {
  63         struct nv04_bus_priv *priv;
  64         int ret;
  65
  66         ret = nouveau_bus_create(parent, engine, oclass, &priv);
  67         *pobject = nv_object(priv);
  68         if (ret)
  69                 return ret;
  70
  71         nv_subdev(priv)->intr = nv04_bus_intr;
  72         return 0;
  73 }
  74
  75 static int
  76 nv04_bus_init(struct nouveau_object *object)
  77 {
  78         struct nv04_bus_priv *priv = (void *)object;
  79
  80         nv_wr32(priv, 0x001100, 0xffffffff);
  81         nv_wr32(priv, 0x001140, 0x00000111);
  82
  83         return nouveau_bus_init(&priv->base);
  84 }
  85
  86 struct nouveau_oclass
  87 nv04_bus_oclass = {
  88         .handle = NV_SUBDEV(BUS, 0x04),
  89         .ofuncs = &(struct nouveau_ofuncs) {
  90                 .ctor = nv04_bus_ctor,
  91                 .dtor = _nouveau_bus_dtor,
  92                 .init = nv04_bus_init,
  93                 .fini = _nouveau_bus_fini,
  94         },
  95 };