drivers/gpu/drm/nouveau/nvkm/subdev/devinit/nv10.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
  32 static void
  33 nv10_devinit_meminit(struct nvkm_devinit *init)
  34 {
  35         struct nvkm_subdev *subdev = &init->subdev;
  36         struct nvkm_device *device = subdev->device;
  37         static const int mem_width[] = { 0x10, 0x00, 0x20 };
  38         int mem_width_count;
  39         uint32_t patt = 0xdeadbeef;
  40         struct io_mapping *fb;
  41         int i, j, k;
  42
  43         if (device->card_type >= NV_11 && device->chipset >= 0x17)
  44                 mem_width_count = 3;
  45         else
  46                 mem_width_count = 2;
  47
  48         /* Map the framebuffer aperture */
  49         fb = fbmem_init(device);
  50         if (!fb) {
  51                 nvkm_error(subdev, "failed to map fb\n");
  52                 return;
  53         }
  54
  55         nvkm_wr32(device, NV10_PFB_REFCTRL, NV10_PFB_REFCTRL_VALID_1);
  56
  57         /* Probe memory bus width */
  58         for (i = 0; i < mem_width_count; i++) {
  59                 nvkm_mask(device, NV04_PFB_CFG0, 0x30, mem_width[i]);
  60
  61                 for (j = 0; j < 4; j++) {
  62                         for (k = 0; k < 4; k++)
  63                                 fbmem_poke(fb, 0x1c, 0);
  64
  65                         fbmem_poke(fb, 0x1c, patt);
  66                         fbmem_poke(fb, 0x3c, 0);
  67
  68                         if (fbmem_peek(fb, 0x1c) == patt)
  69                                 goto mem_width_found;
  70                 }
  71         }
  72
  73 mem_width_found:
  74         patt <<= 1;
  75
  76         /* Probe amount of installed memory */
  77         for (i = 0; i < 4; i++) {
  78                 int off = nvkm_rd32(device, 0x10020c) - 0x100000;
  79
  80                 fbmem_poke(fb, off, patt);
  81                 fbmem_poke(fb, 0, 0);
  82
  83                 fbmem_peek(fb, 0);
  84                 fbmem_peek(fb, 0);
  85                 fbmem_peek(fb, 0);
  86                 fbmem_peek(fb, 0);
  87
  88                 if (fbmem_peek(fb, off) == patt)
  89                         goto amount_found;
  90         }
  91
  92         /* IC missing - disable the upper half memory space. */
  93         nvkm_mask(device, NV04_PFB_CFG0, 0x1000, 0);
  94
  95 amount_found:
  96         fbmem_fini(fb);
  97 }
  98
  99 static const struct nvkm_devinit_func
 100 nv10_devinit = {
 101         .dtor = nv04_devinit_dtor,
 102         .preinit = nv04_devinit_preinit,
 103         .post = nv04_devinit_post,
 104         .meminit = nv10_devinit_meminit,
 105         .pll_set = nv04_devinit_pll_set,
 106 };
 107
 108 int
 109 nv10_devinit_new(struct nvkm_device *device, int index,
 110                  struct nvkm_devinit **pinit)
 111 {
 112         return nv04_devinit_new_(&nv10_devinit, device, index, pinit);
 113 }