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

   1 /*
   2  * Copyright 2012 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/dcb.h>
  26 #include <subdev/bios/conn.h>
  27
  28 u32
  29 nvbios_connTe(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len)
  30 {
  31         u32 dcb = dcb_table(bios, ver, hdr, cnt, len);
  32         if (dcb && *ver >= 0x30 && *hdr >= 0x16) {
  33                 u32 data = nv_ro16(bios, dcb + 0x14);
  34                 if (data) {
  35                         *ver = nv_ro08(bios, data + 0);
  36                         *hdr = nv_ro08(bios, data + 1);
  37                         *cnt = nv_ro08(bios, data + 2);
  38                         *len = nv_ro08(bios, data + 3);
  39                         return data;
  40                 }
  41         }
  42         return 0x00000000;
  43 }
  44
  45 u32
  46 nvbios_connTp(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len,
  47               struct nvbios_connT *info)
  48 {
  49         u32 data = nvbios_connTe(bios, ver, hdr, cnt, len);
  50         memset(info, 0x00, sizeof(*info));
  51         switch (!!data * *ver) {
  52         case 0x30:
  53         case 0x40:
  54                 return data;
  55         default:
  56                 break;
  57         }
  58         return 0x00000000;
  59 }
  60
  61 u32
  62 nvbios_connEe(struct nvkm_bios *bios, u8 idx, u8 *ver, u8 *len)
  63 {
  64         u8  hdr, cnt;
  65         u32 data = nvbios_connTe(bios, ver, &hdr, &cnt, len);
  66         if (data && idx < cnt)
  67                 return data + hdr + (idx * *len);
  68         return 0x00000000;
  69 }
  70
  71 u32
  72 nvbios_connEp(struct nvkm_bios *bios, u8 idx, u8 *ver, u8 *len,
  73               struct nvbios_connE *info)
  74 {
  75         u32 data = nvbios_connEe(bios, idx, ver, len);
  76         memset(info, 0x00, sizeof(*info));
  77         switch (!!data * *ver) {
  78         case 0x30:
  79         case 0x40:
  80                 info->type     =  nv_ro08(bios, data + 0x00);
  81                 info->location =  nv_ro08(bios, data + 0x01) & 0x0f;
  82                 info->hpd      = (nv_ro08(bios, data + 0x01) & 0x30) >> 4;
  83                 info->dp       = (nv_ro08(bios, data + 0x01) & 0xc0) >> 6;
  84                 if (*len < 4)
  85                         return data;
  86                 info->hpd     |= (nv_ro08(bios, data + 0x02) & 0x03) << 2;
  87                 info->dp      |=  nv_ro08(bios, data + 0x02) & 0x0c;
  88                 info->di       = (nv_ro08(bios, data + 0x02) & 0xf0) >> 4;
  89                 info->hpd     |= (nv_ro08(bios, data + 0x03) & 0x07) << 4;
  90                 info->sr       = (nv_ro08(bios, data + 0x03) & 0x08) >> 3;
  91                 info->lcdid    = (nv_ro08(bios, data + 0x03) & 0x70) >> 4;
  92                 return data;
  93         default:
  94                 break;
  95         }
  96         return 0x00000000;
  97 }