drivers/gpu/drm/nouveau/nvkm/subdev/bios/M0205.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/M0205.h>
  27
  28 u32
  29 nvbios_M0205Te(struct nvkm_bios *bios,
  30                u8 *ver, u8 *hdr, u8 *cnt, u8 *len, u8 *snr, u8 *ssz)
  31 {
  32         struct bit_entry bit_M;
  33         u32 data = 0x00000000;
  34
  35         if (!bit_entry(bios, 'M', &bit_M)) {
  36                 if (bit_M.version == 2 && bit_M.length > 0x08)
  37                         data = nvbios_rd32(bios, bit_M.offset + 0x05);
  38                 if (data) {
  39                         *ver = nvbios_rd08(bios, data + 0x00);
  40                         switch (*ver) {
  41                         case 0x10:
  42                                 *hdr = nvbios_rd08(bios, data + 0x01);
  43                                 *len = nvbios_rd08(bios, data + 0x02);
  44                                 *ssz = nvbios_rd08(bios, data + 0x03);
  45                                 *snr = nvbios_rd08(bios, data + 0x04);
  46                                 *cnt = nvbios_rd08(bios, data + 0x05);
  47                                 return data;
  48                         default:
  49                                 break;
  50                         }
  51                 }
  52         }
  53
  54         return 0x00000000;
  55 }
  56
  57 u32
  58 nvbios_M0205Tp(struct nvkm_bios *bios,
  59                u8 *ver, u8 *hdr, u8 *cnt, u8 *len, u8 *snr, u8 *ssz,
  60                struct nvbios_M0205T *info)
  61 {
  62         u32 data = nvbios_M0205Te(bios, ver, hdr, cnt, len, snr, ssz);
  63         memset(info, 0x00, sizeof(*info));
  64         switch (!!data * *ver) {
  65         case 0x10:
  66                 info->freq = nvbios_rd16(bios, data + 0x06);
  67                 break;
  68         default:
  69                 break;
  70         }
  71         return data;
  72 }
  73
  74 u32
  75 nvbios_M0205Ee(struct nvkm_bios *bios, int idx,
  76                u8 *ver, u8 *hdr, u8 *cnt, u8 *len)
  77 {
  78         u8  snr, ssz;
  79         u32 data = nvbios_M0205Te(bios, ver, hdr, cnt, len, &snr, &ssz);
  80         if (data && idx < *cnt) {
  81                 data = data + *hdr + idx * (*len + (snr * ssz));
  82                 *hdr = *len;
  83                 *cnt = snr;
  84                 *len = ssz;
  85                 return data;
  86         }
  87         return 0x00000000;
  88 }
  89
  90 u32
  91 nvbios_M0205Ep(struct nvkm_bios *bios, int idx,
  92                u8 *ver, u8 *hdr, u8 *cnt, u8 *len,
  93                struct nvbios_M0205E *info)
  94 {
  95         u32 data = nvbios_M0205Ee(bios, idx, ver, hdr, cnt, len);
  96         memset(info, 0x00, sizeof(*info));
  97         switch (!!data * *ver) {
  98         case 0x10:
  99                 info->type = nvbios_rd08(bios, data + 0x00) & 0x0f;
 100                 return data;
 101         default:
 102                 break;
 103         }
 104         return 0x00000000;
 105 }
 106
 107 u32
 108 nvbios_M0205Se(struct nvkm_bios *bios, int ent, int idx, u8 *ver, u8 *hdr)
 109 {
 110
 111         u8  cnt, len;
 112         u32 data = nvbios_M0205Ee(bios, ent, ver, hdr, &cnt, &len);
 113         if (data && idx < cnt) {
 114                 data = data + *hdr + idx * len;
 115                 *hdr = len;
 116                 return data;
 117         }
 118         return 0x00000000;
 119 }
 120
 121 u32
 122 nvbios_M0205Sp(struct nvkm_bios *bios, int ent, int idx, u8 *ver, u8 *hdr,
 123                struct nvbios_M0205S *info)
 124 {
 125         u32 data = nvbios_M0205Se(bios, ent, idx, ver, hdr);
 126         memset(info, 0x00, sizeof(*info));
 127         switch (!!data * *ver) {
 128         case 0x10:
 129                 info->data = nvbios_rd08(bios, data + 0x00);
 130                 return data;
 131         default:
 132                 break;
 133         }
 134         return 0x00000000;
 135 }