drivers/gpu/drm/nouveau/nvkm/subdev/timer/gk20a.c

   1 /*
   2  * Copyright 2012 Red Hat Inc.
   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: Ben Skeggs
  23  */
  24 #include "nv04.h"
  25
  26 static int
  27 gk20a_timer_init(struct nvkm_object *object)
  28 {
  29         struct nv04_timer_priv *priv = (void *)object;
  30         u32 hi = upper_32_bits(priv->suspend_time);
  31         u32 lo = lower_32_bits(priv->suspend_time);
  32         int ret;
  33
  34         ret = nvkm_timer_init(&priv->base);
  35         if (ret)
  36                 return ret;
  37
  38         nv_debug(priv, "time low        : 0x%08x\n", lo);
  39         nv_debug(priv, "time high       : 0x%08x\n", hi);
  40
  41         /* restore the time before suspend */
  42         nv_wr32(priv, NV04_PTIMER_TIME_1, hi);
  43         nv_wr32(priv, NV04_PTIMER_TIME_0, lo);
  44         return 0;
  45 }
  46
  47 struct nvkm_oclass
  48 gk20a_timer_oclass = {
  49         .handle = NV_SUBDEV(TIMER, 0xff),
  50         .ofuncs = &(struct nvkm_ofuncs) {
  51                 .ctor = nv04_timer_ctor,
  52                 .dtor = nv04_timer_dtor,
  53                 .init = gk20a_timer_init,
  54                 .fini = nv04_timer_fini,
  55         }
  56 };