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
  27 u32
  28 nvbios_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
  51 u32
  52 nvbios_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 }