linux/drivers/gpu/drm/nouveau/nvkm/subdev/fb/ramnv41.c
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   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
  26int
  27nv41_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  tags = nvkm_rd32(device, 0x100320);
  32        u32 fb474 = nvkm_rd32(device, 0x100474);
  33        enum nvkm_ram_type type = NVKM_RAM_TYPE_UNKNOWN;
  34        int ret;
  35
  36        if (fb474 & 0x00000004)
  37                type = NVKM_RAM_TYPE_GDDR3;
  38        if (fb474 & 0x00000002)
  39                type = NVKM_RAM_TYPE_DDR2;
  40        if (fb474 & 0x00000001)
  41                type = NVKM_RAM_TYPE_DDR1;
  42
  43        ret = nv40_ram_new_(fb, type, size, tags, pram);
  44        if (ret)
  45                return ret;
  46
  47        (*pram)->parts = (nvkm_rd32(device, 0x100200) & 0x00000003) + 1;
  48        return 0;
  49}
  50