LXR linux/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
  28u32
  29nvbios_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 = nvbios_rd16(bios, dcb + 0x14);
  34                if (data) {
  35                        *ver = nvbios_rd08(bios, data + 0);
  36                        *hdr = nvbios_rd08(bios, data + 1);
  37                        *cnt = nvbios_rd08(bios, data + 2);
  38                        *len = nvbios_rd08(bios, data + 3);
  39                        return data;
  40                }
  41        }
  42        return 0x00000000;
  43}
  44
  45u32
  46nvbios_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
  61u32
  62nvbios_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
  71u32
  72nvbios_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     =  nvbios_rd08(bios, data + 0x00);
  81                info->location =  nvbios_rd08(bios, data + 0x01) & 0x0f;
  82                info->hpd      = (nvbios_rd08(bios, data + 0x01) & 0x30) >> 4;
  83                info->dp       = (nvbios_rd08(bios, data + 0x01) & 0xc0) >> 6;
  84                if (*len < 4)
  85                        return data;
  86                info->hpd     |= (nvbios_rd08(bios, data + 0x02) & 0x03) << 2;
  87                info->dp      |=  nvbios_rd08(bios, data + 0x02) & 0x0c;
  88                info->di       = (nvbios_rd08(bios, data + 0x02) & 0xf0) >> 4;
  89                info->hpd     |= (nvbios_rd08(bios, data + 0x03) & 0x07) << 4;
  90                info->sr       = (nvbios_rd08(bios, data + 0x03) & 0x08) >> 3;
  91                info->lcdid    = (nvbios_rd08(bios, data + 0x03) & 0x70) >> 4;
  92                return data;
  93        default:
  94                break;
  95        }
  96        return 0x00000000;
  97}
  98