drivers/gpu/drm/nouveau/nvkm/subdev/fb/ramnv41.c

   1 /*
   2  * Copyright 2013 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 "ramnv40.h"
  25
  26 int
  27 nv41_ram_new(struct nvkm_fb *fb, struct nvkm_ram **pram)
  28 {
  29         struct nvkm_device *device = fb->subdev.device;
  30         u32  size = nvkm_rd32(device, 0x10020c) & 0xff000000;
  31         u32 fb474 = nvkm_rd32(device, 0x100474);
  32         enum nvkm_ram_type type = NVKM_RAM_TYPE_UNKNOWN;
  33         int ret;
  34
  35         if (fb474 & 0x00000004)
  36                 type = NVKM_RAM_TYPE_GDDR3;
  37         if (fb474 & 0x00000002)
  38                 type = NVKM_RAM_TYPE_DDR2;
  39         if (fb474 & 0x00000001)
  40                 type = NVKM_RAM_TYPE_DDR1;
  41
  42         ret = nv40_ram_new_(fb, type, size, pram);
  43         if (ret)
  44                 return ret;
  45
  46         (*pram)->parts = (nvkm_rd32(device, 0x100200) & 0x00000003) + 1;
  47         return 0;
  48 }