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/volt.h> 27 28 u16 29 nvbios_volt_table(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len) 30 { 31 struct bit_entry bit_P; 32 u16 volt = 0x0000; 33 34 if (!bit_entry(bios, 'P', &bit_P)) { 35 if (bit_P.version == 2) 36 volt = nvbios_rd16(bios, bit_P.offset + 0x0c); 37 else 38 if (bit_P.version == 1) 39 volt = nvbios_rd16(bios, bit_P.offset + 0x10); 40 41 if (volt) { 42 *ver = nvbios_rd08(bios, volt + 0); 43 switch (*ver) { 44 case 0x12: 45 *hdr = 5; 46 *cnt = nvbios_rd08(bios, volt + 2); 47 *len = nvbios_rd08(bios, volt + 1); 48 return volt; 49 case 0x20: 50 *hdr = nvbios_rd08(bios, volt + 1); 51 *cnt = nvbios_rd08(bios, volt + 2); 52 *len = nvbios_rd08(bios, volt + 3); 53 return volt; 54 case 0x30: 55 case 0x40: 56 case 0x50: 57 *hdr = nvbios_rd08(bios, volt + 1); 58 *cnt = nvbios_rd08(bios, volt + 3); 59 *len = nvbios_rd08(bios, volt + 2); 60 return volt; 61 } 62 } 63 } 64 65 return 0x0000; 66 } 67 68 u16 69 nvbios_volt_parse(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len, 70 struct nvbios_volt *info) 71 { 72 u16 volt = nvbios_volt_table(bios, ver, hdr, cnt, len); 73 memset(info, 0x00, sizeof(*info)); 74 switch (!!volt * *ver) { 75 case 0x12: 76 info->vidmask = nvbios_rd08(bios, volt + 0x04); 77 break; 78 case 0x20: 79 info->vidmask = nvbios_rd08(bios, volt + 0x05); 80 break; 81 case 0x30: 82 info->vidmask = nvbios_rd08(bios, volt + 0x04); 83 break; 84 case 0x40: 85 info->base = nvbios_rd32(bios, volt + 0x04); 86 info->step = nvbios_rd16(bios, volt + 0x08); 87 info->vidmask = nvbios_rd08(bios, volt + 0x0b); 88 /*XXX*/ 89 info->min = 0; 90 info->max = info->base; 91 break; 92 case 0x50: 93 info->vidmask = nvbios_rd08(bios, volt + 0x06); 94 info->min = nvbios_rd32(bios, volt + 0x0a); 95 info->max = nvbios_rd32(bios, volt + 0x0e); 96 info->base = nvbios_rd32(bios, volt + 0x12) & 0x00ffffff; 97 info->step = nvbios_rd16(bios, volt + 0x16); 98 break; 99 } 100 return volt; 101 } 102 103 u16 104 nvbios_volt_entry(struct nvkm_bios *bios, int idx, u8 *ver, u8 *len) 105 { 106 u8 hdr, cnt; 107 u16 volt = nvbios_volt_table(bios, ver, &hdr, &cnt, len); 108 if (volt && idx < cnt) { 109 volt = volt + hdr + (idx * *len); 110 return volt; 111 } 112 return 0x0000; 113 } 114 115 u16 116 nvbios_volt_entry_parse(struct nvkm_bios *bios, int idx, u8 *ver, u8 *len, 117 struct nvbios_volt_entry *info) 118 { 119 u16 volt = nvbios_volt_entry(bios, idx, ver, len); 120 memset(info, 0x00, sizeof(*info)); 121 switch (!!volt * *ver) { 122 case 0x12: 123 case 0x20: 124 info->voltage = nvbios_rd08(bios, volt + 0x00) * 10000; 125 info->vid = nvbios_rd08(bios, volt + 0x01); 126 break; 127 case 0x30: 128 info->voltage = nvbios_rd08(bios, volt + 0x00) * 10000; 129 info->vid = nvbios_rd08(bios, volt + 0x01) >> 2; 130 break; 131 case 0x40: 132 case 0x50: 133 break; 134 } 135 return volt; 136 } 137