1 /* 2 * Copyright 2012 Nouveau Community 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: Martin Peres 23 */ 24 #include <subdev/bios.h> 25 #include <subdev/bios/bit.h> 26 #include <subdev/bios/vmap.h> 27 28 u16 29 nvbios_vmap_table(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len) 30 { 31 struct bit_entry bit_P; 32 u16 vmap = 0x0000; 33 34 if (!bit_entry(bios, 'P', &bit_P)) { 35 if (bit_P.version == 2) { 36 vmap = nvbios_rd16(bios, bit_P.offset + 0x20); 37 if (vmap) { 38 *ver = nvbios_rd08(bios, vmap + 0); 39 switch (*ver) { 40 case 0x10: 41 case 0x20: 42 *hdr = nvbios_rd08(bios, vmap + 1); 43 *cnt = nvbios_rd08(bios, vmap + 3); 44 *len = nvbios_rd08(bios, vmap + 2); 45 return vmap; 46 default: 47 break; 48 } 49 } 50 } 51 } 52 53 return 0x0000; 54 } 55 56 u16 57 nvbios_vmap_parse(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len, 58 struct nvbios_vmap *info) 59 { 60 u16 vmap = nvbios_vmap_table(bios, ver, hdr, cnt, len); 61 memset(info, 0x00, sizeof(*info)); 62 switch (!!vmap * *ver) { 63 case 0x10: 64 case 0x20: 65 break; 66 } 67 return vmap; 68 } 69 70 u16 71 nvbios_vmap_entry(struct nvkm_bios *bios, int idx, u8 *ver, u8 *len) 72 { 73 u8 hdr, cnt; 74 u16 vmap = nvbios_vmap_table(bios, ver, &hdr, &cnt, len); 75 if (vmap && idx < cnt) { 76 vmap = vmap + hdr + (idx * *len); 77 return vmap; 78 } 79 return 0x0000; 80 } 81 82 u16 83 nvbios_vmap_entry_parse(struct nvkm_bios *bios, int idx, u8 *ver, u8 *len, 84 struct nvbios_vmap_entry *info) 85 { 86 u16 vmap = nvbios_vmap_entry(bios, idx, ver, len); 87 memset(info, 0x00, sizeof(*info)); 88 switch (!!vmap * *ver) { 89 case 0x10: 90 info->link = 0xff; 91 info->min = nvbios_rd32(bios, vmap + 0x00); 92 info->max = nvbios_rd32(bios, vmap + 0x04); 93 info->arg[0] = nvbios_rd32(bios, vmap + 0x08); 94 info->arg[1] = nvbios_rd32(bios, vmap + 0x0c); 95 info->arg[2] = nvbios_rd32(bios, vmap + 0x10); 96 break; 97 case 0x20: 98 info->unk0 = nvbios_rd08(bios, vmap + 0x00); 99 info->link = nvbios_rd08(bios, vmap + 0x01); 100 info->min = nvbios_rd32(bios, vmap + 0x02); 101 info->max = nvbios_rd32(bios, vmap + 0x06); 102 info->arg[0] = nvbios_rd32(bios, vmap + 0x0a); 103 info->arg[1] = nvbios_rd32(bios, vmap + 0x0e); 104 info->arg[2] = nvbios_rd32(bios, vmap + 0x12); 105 info->arg[3] = nvbios_rd32(bios, vmap + 0x16); 106 info->arg[4] = nvbios_rd32(bios, vmap + 0x1a); 107 info->arg[5] = nvbios_rd32(bios, vmap + 0x1e); 108 break; 109 } 110 return vmap; 111 } 112