drivers/gpu/drm/nouveau/core/subdev/bus/nv31.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 nv31_bus_priv {
  29         struct nouveau_bus base;
  30 };
  31
  32 static void
  33 nv31_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         u32 gpio = nv_rd32(pbus, 0x001104) & nv_rd32(pbus, 0x001144);
  38
  39         if (gpio) {
  40                 subdev = nouveau_subdev(pbus, NVDEV_SUBDEV_GPIO);
  41                 if (subdev && subdev->intr)
  42                         subdev->intr(subdev);
  43         }
  44
  45         if (stat & 0x00000008) {
  46                 nv_error(pbus, "MMIO FAULT\n"); /* NV41- */
  47                 stat &= ~0x00000008;
  48                 nv_wr32(pbus, 0x001100, 0x00000008);
  49         }
  50
  51         if (stat & 0x00070000) {
  52                 subdev = nouveau_subdev(pbus, NVDEV_SUBDEV_THERM);
  53                 if (subdev && subdev->intr)
  54                         subdev->intr(subdev);
  55                 stat &= ~0x00070000;
  56                 nv_wr32(pbus, 0x001100, 0x00070000);
  57         }
  58
  59         if (stat) {
  60                 nv_error(pbus, "unknown intr 0x%08x\n", stat);
  61                 nv_mask(pbus, 0x001140, stat, 0x00000000);
  62         }
  63 }
  64
  65 static int
  66 nv31_bus_init(struct nouveau_object *object)
  67 {
  68         struct nv31_bus_priv *priv = (void *)object;
  69         int ret;
  70
  71         ret = nouveau_bus_init(&priv->base);
  72         if (ret)
  73                 return ret;
  74
  75         nv_wr32(priv, 0x001100, 0xffffffff);
  76         nv_wr32(priv, 0x001140, 0x00070008);
  77         return 0;
  78 }
  79
  80 static int
  81 nv31_bus_ctor(struct nouveau_object *parent, struct nouveau_object *engine,
  82               struct nouveau_oclass *oclass, void *data, u32 size,
  83               struct nouveau_object **pobject)
  84 {
  85         struct nv31_bus_priv *priv;
  86         int ret;
  87
  88         ret = nouveau_bus_create(parent, engine, oclass, &priv);
  89         *pobject = nv_object(priv);
  90         if (ret)
  91                 return ret;
  92
  93         nv_subdev(priv)->intr = nv31_bus_intr;
  94         return 0;
  95 }
  96
  97 struct nouveau_oclass
  98 nv31_bus_oclass = {
  99         .handle = NV_SUBDEV(BUS, 0x31),
 100         .ofuncs = &(struct nouveau_ofuncs) {
 101                 .ctor = nv31_bus_ctor,
 102                 .dtor = _nouveau_bus_dtor,
 103                 .init = nv31_bus_init,
 104                 .fini = _nouveau_bus_fini,
 105         },
 106 };