drivers/gpu/drm/nouveau/nvkm/subdev/bios/dp.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/bit.h>
  26 #include <subdev/bios/dp.h>
  27
  28 static u16
  29 nvbios_dp_table(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len)
  30 {
  31         struct bit_entry d;
  32
  33         if (!bit_entry(bios, 'd', &d)) {
  34                 if (d.version == 1 && d.length >= 2) {
  35                         u16 data = nvbios_rd16(bios, d.offset);
  36                         if (data) {
  37                                 *ver = nvbios_rd08(bios, data + 0x00);
  38                                 switch (*ver) {
  39                                 case 0x20:
  40                                 case 0x21:
  41                                 case 0x30:
  42                                 case 0x40:
  43                                 case 0x41:
  44                                 case 0x42:
  45                                         *hdr = nvbios_rd08(bios, data + 0x01);
  46                                         *len = nvbios_rd08(bios, data + 0x02);
  47                                         *cnt = nvbios_rd08(bios, data + 0x03);
  48                                         return data;
  49                                 default:
  50                                         break;
  51                                 }
  52                         }
  53                 }
  54         }
  55
  56         return 0x0000;
  57 }
  58
  59 static u16
  60 nvbios_dpout_entry(struct nvkm_bios *bios, u8 idx,
  61                    u8 *ver, u8 *hdr, u8 *cnt, u8 *len)
  62 {
  63         u16 data = nvbios_dp_table(bios, ver, hdr, cnt, len);
  64         if (data && idx < *cnt) {
  65                 u16 outp = nvbios_rd16(bios, data + *hdr + idx * *len);
  66                 switch (*ver * !!outp) {
  67                 case 0x20:
  68                 case 0x21:
  69                 case 0x30:
  70                         *hdr = nvbios_rd08(bios, data + 0x04);
  71                         *len = nvbios_rd08(bios, data + 0x05);
  72                         *cnt = nvbios_rd08(bios, outp + 0x04);
  73                         break;
  74                 case 0x40:
  75                 case 0x41:
  76                 case 0x42:
  77                         *hdr = nvbios_rd08(bios, data + 0x04);
  78                         *cnt = 0;
  79                         *len = 0;
  80                         break;
  81                 default:
  82                         break;
  83                 }
  84                 return outp;
  85         }
  86         *ver = 0x00;
  87         return 0x0000;
  88 }
  89
  90 u16
  91 nvbios_dpout_parse(struct nvkm_bios *bios, u8 idx,
  92                    u8 *ver, u8 *hdr, u8 *cnt, u8 *len,
  93                    struct nvbios_dpout *info)
  94 {
  95         u16 data = nvbios_dpout_entry(bios, idx, ver, hdr, cnt, len);
  96         memset(info, 0x00, sizeof(*info));
  97         if (data && *ver) {
  98                 info->type = nvbios_rd16(bios, data + 0x00);
  99                 info->mask = nvbios_rd16(bios, data + 0x02);
 100                 switch (*ver) {
 101                 case 0x20:
 102                         info->mask |= 0x00c0; /* match any link */
 103                         /* fall-through */
 104                 case 0x21:
 105                 case 0x30:
 106                         info->flags     = nvbios_rd08(bios, data + 0x05);
 107                         info->script[0] = nvbios_rd16(bios, data + 0x06);
 108                         info->script[1] = nvbios_rd16(bios, data + 0x08);
 109                         if (*len >= 0x0c)
 110                                 info->lnkcmp    = nvbios_rd16(bios, data + 0x0a);
 111                         if (*len >= 0x0f) {
 112                                 info->script[2] = nvbios_rd16(bios, data + 0x0c);
 113                                 info->script[3] = nvbios_rd16(bios, data + 0x0e);
 114                         }
 115                         if (*len >= 0x11)
 116                                 info->script[4] = nvbios_rd16(bios, data + 0x10);
 117                         break;
 118                 case 0x40:
 119                 case 0x41:
 120                 case 0x42:
 121                         info->flags     = nvbios_rd08(bios, data + 0x04);
 122                         info->script[0] = nvbios_rd16(bios, data + 0x05);
 123                         info->script[1] = nvbios_rd16(bios, data + 0x07);
 124                         info->lnkcmp    = nvbios_rd16(bios, data + 0x09);
 125                         info->script[2] = nvbios_rd16(bios, data + 0x0b);
 126                         info->script[3] = nvbios_rd16(bios, data + 0x0d);
 127                         info->script[4] = nvbios_rd16(bios, data + 0x0f);
 128                         break;
 129                 default:
 130                         data = 0x0000;
 131                         break;
 132                 }
 133         }
 134         return data;
 135 }
 136
 137 u16
 138 nvbios_dpout_match(struct nvkm_bios *bios, u16 type, u16 mask,
 139                    u8 *ver, u8 *hdr, u8 *cnt, u8 *len,
 140                    struct nvbios_dpout *info)
 141 {
 142         u16 data, idx = 0;
 143         while ((data = nvbios_dpout_parse(bios, idx++, ver, hdr, cnt, len, info)) || *ver) {
 144                 if (data && info->type == type) {
 145                         if ((info->mask & mask) == mask)
 146                                 break;
 147                 }
 148         }
 149         return data;
 150 }
 151
 152 static u16
 153 nvbios_dpcfg_entry(struct nvkm_bios *bios, u16 outp, u8 idx,
 154                    u8 *ver, u8 *hdr, u8 *cnt, u8 *len)
 155 {
 156         if (*ver >= 0x40) {
 157                 outp = nvbios_dp_table(bios, ver, hdr, cnt, len);
 158                 *hdr = *hdr + (*len * * cnt);
 159                 *len = nvbios_rd08(bios, outp + 0x06);
 160                 *cnt = nvbios_rd08(bios, outp + 0x07) *
 161                        nvbios_rd08(bios, outp + 0x05);
 162         }
 163
 164         if (idx < *cnt)
 165                 return outp + *hdr + (idx * *len);
 166
 167         return 0x0000;
 168 }
 169
 170 u16
 171 nvbios_dpcfg_parse(struct nvkm_bios *bios, u16 outp, u8 idx,
 172                    u8 *ver, u8 *hdr, u8 *cnt, u8 *len,
 173                    struct nvbios_dpcfg *info)
 174 {
 175         u16 data = nvbios_dpcfg_entry(bios, outp, idx, ver, hdr, cnt, len);
 176         memset(info, 0x00, sizeof(*info));
 177         if (data) {
 178                 switch (*ver) {
 179                 case 0x20:
 180                 case 0x21:
 181                         info->dc    = nvbios_rd08(bios, data + 0x02);
 182                         info->pe    = nvbios_rd08(bios, data + 0x03);
 183                         info->tx_pu = nvbios_rd08(bios, data + 0x04);
 184                         break;
 185                 case 0x30:
 186                 case 0x40:
 187                 case 0x41:
 188                         info->pc    = nvbios_rd08(bios, data + 0x00);
 189                         info->dc    = nvbios_rd08(bios, data + 0x01);
 190                         info->pe    = nvbios_rd08(bios, data + 0x02);
 191                         info->tx_pu = nvbios_rd08(bios, data + 0x03);
 192                         break;
 193                 case 0x42:
 194                         info->dc    = nvbios_rd08(bios, data + 0x00);
 195                         info->pe    = nvbios_rd08(bios, data + 0x01);
 196                         info->tx_pu = nvbios_rd08(bios, data + 0x02);
 197                         break;
 198                 default:
 199                         data = 0x0000;
 200                         break;
 201                 }
 202         }
 203         return data;
 204 }
 205
 206 u16
 207 nvbios_dpcfg_match(struct nvkm_bios *bios, u16 outp, u8 pc, u8 vs, u8 pe,
 208                    u8 *ver, u8 *hdr, u8 *cnt, u8 *len,
 209                    struct nvbios_dpcfg *info)
 210 {
 211         u8 idx = 0xff;
 212         u16 data;
 213
 214         if (*ver >= 0x30) {
 215                 const u8 vsoff[] = { 0, 4, 7, 9 };
 216                 idx = (pc * 10) + vsoff[vs] + pe;
 217                 if (*ver >= 0x40 && *ver <= 0x41 && *hdr >= 0x12)
 218                         idx += nvbios_rd08(bios, outp + 0x11) * 40;
 219                 else
 220                 if (*ver >= 0x42)
 221                         idx += nvbios_rd08(bios, outp + 0x11) * 10;
 222         } else {
 223                 while ((data = nvbios_dpcfg_entry(bios, outp, ++idx,
 224                                                   ver, hdr, cnt, len))) {
 225                         if (nvbios_rd08(bios, data + 0x00) == vs &&
 226                             nvbios_rd08(bios, data + 0x01) == pe)
 227                                 break;
 228                 }
 229         }
 230
 231         return nvbios_dpcfg_parse(bios, outp, idx, ver, hdr, cnt, len, info);
 232 }