LXR linux/drivers/gpu/drm/nouveau/nvkm/subdev/devinit/nv20.c

   1/*
   2 * Copyright (C) 2010 Francisco Jerez.
   3 * All Rights Reserved.
   4 *
   5 * Permission is hereby granted, free of charge, to any person obtaining
   6 * a copy of this software and associated documentation files (the
   7 * "Software"), to deal in the Software without restriction, including
   8 * without limitation the rights to use, copy, modify, merge, publish,
   9 * distribute, sublicense, and/or sell copies of the Software, and to
  10 * permit persons to whom the Software is furnished to do so, subject to
  11 * the following conditions:
  12 *
  13 * The above copyright notice and this permission notice (including the
  14 * next paragraph) shall be included in all copies or substantial
  15 * portions of the Software.
  16 *
  17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  18 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  20 * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
  21 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  22 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  23 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  24 *
  25 */
  26#include "nv04.h"
  27#include "fbmem.h"
  28
  29#include <subdev/bios.h>
  30#include <subdev/bios/init.h>
  31
  32static void
  33nv20_devinit_meminit(struct nvkm_devinit *init)
  34{
  35        struct nvkm_subdev *subdev = &init->subdev;
  36        struct nvkm_device *device = subdev->device;
  37        uint32_t mask = (device->chipset >= 0x25 ? 0x300 : 0x900);
  38        uint32_t amount, off;
  39        struct io_mapping *fb;
  40
  41        /* Map the framebuffer aperture */
  42        fb = fbmem_init(device);
  43        if (!fb) {
  44                nvkm_error(subdev, "failed to map fb\n");
  45                return;
  46        }
  47
  48        nvkm_wr32(device, NV10_PFB_REFCTRL, NV10_PFB_REFCTRL_VALID_1);
  49
  50        /* Allow full addressing */
  51        nvkm_mask(device, NV04_PFB_CFG0, 0, mask);
  52
  53        amount = nvkm_rd32(device, 0x10020c);
  54        for (off = amount; off > 0x2000000; off -= 0x2000000)
  55                fbmem_poke(fb, off - 4, off);
  56
  57        amount = nvkm_rd32(device, 0x10020c);
  58        if (amount != fbmem_peek(fb, amount - 4))
  59                /* IC missing - disable the upper half memory space. */
  60                nvkm_mask(device, NV04_PFB_CFG0, mask, 0);
  61
  62        fbmem_fini(fb);
  63}
  64
  65static const struct nvkm_devinit_func
  66nv20_devinit = {
  67        .dtor = nv04_devinit_dtor,
  68        .preinit = nv04_devinit_preinit,
  69        .post = nv04_devinit_post,
  70        .meminit = nv20_devinit_meminit,
  71        .pll_set = nv04_devinit_pll_set,
  72};
  73
  74int
  75nv20_devinit_new(struct nvkm_device *device, int index,
  76                 struct nvkm_devinit **pinit)
  77{
  78        return nv04_devinit_new_(&nv20_devinit, device, index, pinit);
  79}
  80