drivers/gpu/drm/nouveau/nvkm/subdev/bios/P0260.c

   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 <subdev/bios.h>
  25 #include <subdev/bios/bit.h>
  26 #include <subdev/bios/P0260.h>
  27
  28 u32
  29 nvbios_P0260Te(struct nvkm_bios *bios,
  30                u8 *ver, u8 *hdr, u8 *cnt, u8 *len, u8 *xnr, u8 *xsz)
  31 {
  32         struct bit_entry bit_P;
  33         u32 data = 0x00000000;
  34
  35         if (!bit_entry(bios, 'P', &bit_P)) {
  36                 if (bit_P.version == 2 && bit_P.length > 0x63)
  37                         data = nvbios_rd32(bios, bit_P.offset + 0x60);
  38                 if (data) {
  39                         *ver = nvbios_rd08(bios, data + 0);
  40                         switch (*ver) {
  41                         case 0x10:
  42                                 *hdr = nvbios_rd08(bios, data + 1);
  43                                 *cnt = nvbios_rd08(bios, data + 2);
  44                                 *len = 4;
  45                                 *xnr = nvbios_rd08(bios, data + 3);
  46                                 *xsz = 4;
  47                                 return data;
  48                         default:
  49                                 break;
  50                         }
  51                 }
  52         }
  53
  54         return 0x00000000;
  55 }
  56
  57 u32
  58 nvbios_P0260Ee(struct nvkm_bios *bios, int idx, u8 *ver, u8 *len)
  59 {
  60         u8  hdr, cnt, xnr, xsz;
  61         u32 data = nvbios_P0260Te(bios, ver, &hdr, &cnt, len, &xnr, &xsz);
  62         if (data && idx < cnt)
  63                 return data + hdr + (idx * *len);
  64         return 0x00000000;
  65 }
  66
  67 u32
  68 nvbios_P0260Ep(struct nvkm_bios *bios, int idx, u8 *ver, u8 *len,
  69                struct nvbios_P0260E *info)
  70 {
  71         u32 data = nvbios_P0260Ee(bios, idx, ver, len);
  72         memset(info, 0x00, sizeof(*info));
  73         switch (!!data * *ver) {
  74         case 0x10:
  75                 info->data = nvbios_rd32(bios, data);
  76                 return data;
  77         default:
  78                 break;
  79         }
  80         return 0x00000000;
  81 }
  82
  83 u32
  84 nvbios_P0260Xe(struct nvkm_bios *bios, int idx, u8 *ver, u8 *xsz)
  85 {
  86         u8  hdr, cnt, len, xnr;
  87         u32 data = nvbios_P0260Te(bios, ver, &hdr, &cnt, &len, &xnr, xsz);
  88         if (data && idx < xnr)
  89                 return data + hdr + (cnt * len) + (idx * *xsz);
  90         return 0x00000000;
  91 }
  92
  93 u32
  94 nvbios_P0260Xp(struct nvkm_bios *bios, int idx, u8 *ver, u8 *hdr,
  95                struct nvbios_P0260X *info)
  96 {
  97         u32 data = nvbios_P0260Xe(bios, idx, ver, hdr);
  98         memset(info, 0x00, sizeof(*info));
  99         switch (!!data * *ver) {
 100         case 0x10:
 101                 info->data = nvbios_rd32(bios, data);
 102                 return data;
 103         default:
 104                 break;
 105         }
 106         return 0x00000000;
 107 }