LXR linux/drivers/gpu/drm/nouveau/nvkm/subdev/bios/pcir.c

   1/*
   2 * Copyright 2014 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 <bskeggs@redhat.com>
  23 */
  24#include <subdev/bios.h>
  25#include <subdev/bios/pcir.h>
  26
  27u32
  28nvbios_pcirTe(struct nvkm_bios *bios, u32 base, u8 *ver, u16 *hdr)
  29{
  30        u32 data = nvbios_rd16(bios, base + 0x18);
  31        if (data) {
  32                data += base;
  33                switch (nvbios_rd32(bios, data + 0x00)) {
  34                case 0x52494350: /* PCIR */
  35                case 0x53494752: /* RGIS */
  36                case 0x5344504e: /* NPDS */
  37                        *hdr = nvbios_rd16(bios, data + 0x0a);
  38                        *ver = nvbios_rd08(bios, data + 0x0c);
  39                        break;
  40                default:
  41                        nvkm_debug(&bios->subdev,
  42                                   "%08x: PCIR signature (%08x) unknown\n",
  43                                   data, nvbios_rd32(bios, data + 0x00));
  44                        data = 0;
  45                        break;
  46                }
  47        }
  48        return data;
  49}
  50
  51u32
  52nvbios_pcirTp(struct nvkm_bios *bios, u32 base, u8 *ver, u16 *hdr,
  53              struct nvbios_pcirT *info)
  54{
  55        u32 data = nvbios_pcirTe(bios, base, ver, hdr);
  56        memset(info, 0x00, sizeof(*info));
  57        if (data) {
  58                info->vendor_id = nvbios_rd16(bios, data + 0x04);
  59                info->device_id = nvbios_rd16(bios, data + 0x06);
  60                info->class_code[0] = nvbios_rd08(bios, data + 0x0d);
  61                info->class_code[1] = nvbios_rd08(bios, data + 0x0e);
  62                info->class_code[2] = nvbios_rd08(bios, data + 0x0f);
  63                info->image_size = nvbios_rd16(bios, data + 0x10) * 512;
  64                info->image_rev = nvbios_rd16(bios, data + 0x12);
  65                info->image_type = nvbios_rd08(bios, data + 0x14);
  66                info->last = nvbios_rd08(bios, data + 0x15) & 0x80;
  67        }
  68        return data;
  69}
  70