drivers/gpu/drm/nouveau/nvkm/subdev/bios/timing.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/timing.h>
  27
  28 u32
  29 nvbios_timingTe(struct nvkm_bios *bios,
  30                 u8 *ver, u8 *hdr, u8 *cnt, u8 *len, u8 *snr, u8 *ssz)
  31 {
  32         struct bit_entry bit_P;
  33         u32 timing = 0;
  34
  35         if (!bit_entry(bios, 'P', &bit_P)) {
  36                 if (bit_P.version == 1)
  37                         timing = nvbios_rd32(bios, bit_P.offset + 4);
  38                 else
  39                 if (bit_P.version == 2)
  40                         timing = nvbios_rd32(bios, bit_P.offset + 8);
  41
  42                 if (timing) {
  43                         *ver = nvbios_rd08(bios, timing + 0);
  44                         switch (*ver) {
  45                         case 0x10:
  46                                 *hdr = nvbios_rd08(bios, timing + 1);
  47                                 *cnt = nvbios_rd08(bios, timing + 2);
  48                                 *len = nvbios_rd08(bios, timing + 3);
  49                                 *snr = 0;
  50                                 *ssz = 0;
  51                                 return timing;
  52                         case 0x20:
  53                                 *hdr = nvbios_rd08(bios, timing + 1);
  54                                 *cnt = nvbios_rd08(bios, timing + 5);
  55                                 *len = nvbios_rd08(bios, timing + 2);
  56                                 *snr = nvbios_rd08(bios, timing + 4);
  57                                 *ssz = nvbios_rd08(bios, timing + 3);
  58                                 return timing;
  59                         default:
  60                                 break;
  61                         }
  62                 }
  63         }
  64
  65         return 0;
  66 }
  67
  68 u32
  69 nvbios_timingEe(struct nvkm_bios *bios, int idx,
  70                 u8 *ver, u8 *hdr, u8 *cnt, u8 *len)
  71 {
  72         u8  snr, ssz;
  73         u32 timing = nvbios_timingTe(bios, ver, hdr, cnt, len, &snr, &ssz);
  74         if (timing && idx < *cnt) {
  75                 timing += *hdr + idx * (*len + (snr * ssz));
  76                 *hdr = *len;
  77                 *cnt = snr;
  78                 *len = ssz;
  79                 return timing;
  80         }
  81         return 0;
  82 }
  83
  84 u32
  85 nvbios_timingEp(struct nvkm_bios *bios, int idx,
  86                 u8 *ver, u8 *hdr, u8 *cnt, u8 *len, struct nvbios_ramcfg *p)
  87 {
  88         u32 data = nvbios_timingEe(bios, idx, ver, hdr, cnt, len), temp;
  89         p->timing_ver = *ver;
  90         p->timing_hdr = *hdr;
  91         switch (!!data * *ver) {
  92         case 0x10:
  93                 p->timing_10_WR    = nvbios_rd08(bios, data + 0x00);
  94                 p->timing_10_WTR   = nvbios_rd08(bios, data + 0x01);
  95                 p->timing_10_CL    = nvbios_rd08(bios, data + 0x02);
  96                 p->timing_10_RC    = nvbios_rd08(bios, data + 0x03);
  97                 p->timing_10_RFC   = nvbios_rd08(bios, data + 0x05);
  98                 p->timing_10_RAS   = nvbios_rd08(bios, data + 0x07);
  99                 p->timing_10_RP    = nvbios_rd08(bios, data + 0x09);
 100                 p->timing_10_RCDRD = nvbios_rd08(bios, data + 0x0a);
 101                 p->timing_10_RCDWR = nvbios_rd08(bios, data + 0x0b);
 102                 p->timing_10_RRD   = nvbios_rd08(bios, data + 0x0c);
 103                 p->timing_10_13    = nvbios_rd08(bios, data + 0x0d);
 104                 p->timing_10_ODT   = nvbios_rd08(bios, data + 0x0e) & 0x07;
 105                 if (p->ramcfg_ver >= 0x10)
 106                         p->ramcfg_RON = nvbios_rd08(bios, data + 0x0e) & 0x07;
 107
 108                 p->timing_10_24  = 0xff;
 109                 p->timing_10_21  = 0;
 110                 p->timing_10_20  = 0;
 111                 p->timing_10_CWL = 0;
 112                 p->timing_10_18  = 0;
 113                 p->timing_10_16  = 0;
 114
 115                 switch (min_t(u8, *hdr, 25)) {
 116                 case 25:
 117                         p->timing_10_24  = nvbios_rd08(bios, data + 0x18);
 118                         fallthrough;
 119                 case 24:
 120                 case 23:
 121                 case 22:
 122                         p->timing_10_21  = nvbios_rd08(bios, data + 0x15);
 123                         fallthrough;
 124                 case 21:
 125                         p->timing_10_20  = nvbios_rd08(bios, data + 0x14);
 126                         fallthrough;
 127                 case 20:
 128                         p->timing_10_CWL = nvbios_rd08(bios, data + 0x13);
 129                         fallthrough;
 130                 case 19:
 131                         p->timing_10_18  = nvbios_rd08(bios, data + 0x12);
 132                         fallthrough;
 133                 case 18:
 134                 case 17:
 135                         p->timing_10_16  = nvbios_rd08(bios, data + 0x10);
 136                 }
 137
 138                 break;
 139         case 0x20:
 140                 p->timing[0] = nvbios_rd32(bios, data + 0x00);
 141                 p->timing[1] = nvbios_rd32(bios, data + 0x04);
 142                 p->timing[2] = nvbios_rd32(bios, data + 0x08);
 143                 p->timing[3] = nvbios_rd32(bios, data + 0x0c);
 144                 p->timing[4] = nvbios_rd32(bios, data + 0x10);
 145                 p->timing[5] = nvbios_rd32(bios, data + 0x14);
 146                 p->timing[6] = nvbios_rd32(bios, data + 0x18);
 147                 p->timing[7] = nvbios_rd32(bios, data + 0x1c);
 148                 p->timing[8] = nvbios_rd32(bios, data + 0x20);
 149                 p->timing[9] = nvbios_rd32(bios, data + 0x24);
 150                 p->timing[10] = nvbios_rd32(bios, data + 0x28);
 151                 p->timing_20_2e_03 = (nvbios_rd08(bios, data + 0x2e) & 0x03) >> 0;
 152                 p->timing_20_2e_30 = (nvbios_rd08(bios, data + 0x2e) & 0x30) >> 4;
 153                 p->timing_20_2e_c0 = (nvbios_rd08(bios, data + 0x2e) & 0xc0) >> 6;
 154                 p->timing_20_2f_03 = (nvbios_rd08(bios, data + 0x2f) & 0x03) >> 0;
 155                 temp = nvbios_rd16(bios, data + 0x2c);
 156                 p->timing_20_2c_003f = (temp & 0x003f) >> 0;
 157                 p->timing_20_2c_1fc0 = (temp & 0x1fc0) >> 6;
 158                 p->timing_20_30_07 = (nvbios_rd08(bios, data + 0x30) & 0x07) >> 0;
 159                 p->timing_20_30_f8 = (nvbios_rd08(bios, data + 0x30) & 0xf8) >> 3;
 160                 temp = nvbios_rd16(bios, data + 0x31);
 161                 p->timing_20_31_0007 = (temp & 0x0007) >> 0;
 162                 p->timing_20_31_0078 = (temp & 0x0078) >> 3;
 163                 p->timing_20_31_0780 = (temp & 0x0780) >> 7;
 164                 p->timing_20_31_0800 = (temp & 0x0800) >> 11;
 165                 p->timing_20_31_7000 = (temp & 0x7000) >> 12;
 166                 p->timing_20_31_8000 = (temp & 0x8000) >> 15;
 167                 break;
 168         default:
 169                 data = 0;
 170                 break;
 171         }
 172         return data;
 173 }