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 u32 29 nvbios_volt_table(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len) 30 { 31 struct bit_entry bit_P; 32 u32 volt = 0; 33 34 if (!bit_entry(bios, 'P', &bit_P)) { 35 if (bit_P.version == 2) 36 volt = nvbios_rd32(bios, bit_P.offset + 0x0c); 37 else 38 if (bit_P.version == 1) 39 volt = nvbios_rd32(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 0; 66 } 67 68 u32 69 nvbios_volt_parse(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len, 70 struct nvbios_volt *info) 71 { 72 u32 volt = nvbios_volt_table(bios, ver, hdr, cnt, len); 73 memset(info, 0x00, sizeof(*info)); 74 switch (!!volt * *ver) { 75 case 0x12: 76 info->type = NVBIOS_VOLT_GPIO; 77 info->vidmask = nvbios_rd08(bios, volt + 0x04); 78 info->ranged = false; 79 break; 80 case 0x20: 81 info->type = NVBIOS_VOLT_GPIO; 82 info->vidmask = nvbios_rd08(bios, volt + 0x05); 83 info->ranged = false; 84 break; 85 case 0x30: 86 info->type = NVBIOS_VOLT_GPIO; 87 info->vidmask = nvbios_rd08(bios, volt + 0x04); 88 info->ranged = false; 89 break; 90 case 0x40: 91 info->type = NVBIOS_VOLT_GPIO; 92 info->base = nvbios_rd32(bios, volt + 0x04); 93 info->step = nvbios_rd16(bios, volt + 0x08); 94 info->vidmask = nvbios_rd08(bios, volt + 0x0b); 95 info->ranged = true; /* XXX: find the flag byte */ 96 /*XXX*/ 97 info->min = 0; 98 info->max = info->base; 99 break; 100 case 0x50: 101 info->min = nvbios_rd32(bios, volt + 0x0a); 102 info->max = nvbios_rd32(bios, volt + 0x0e); 103 info->base = nvbios_rd32(bios, volt + 0x12) & 0x00ffffff; 104 105 /* offset 4 seems to be a flag byte */ 106 if (nvbios_rd32(bios, volt + 0x4) & 1) { 107 info->type = NVBIOS_VOLT_PWM; 108 info->pwm_freq = nvbios_rd32(bios, volt + 0x5) / 1000; 109 info->pwm_range = nvbios_rd32(bios, volt + 0x16); 110 } else { 111 info->type = NVBIOS_VOLT_GPIO; 112 info->vidmask = nvbios_rd08(bios, volt + 0x06); 113 info->step = nvbios_rd16(bios, volt + 0x16); 114 info->ranged = 115 !!(nvbios_rd08(bios, volt + 0x4) & 0x2); 116 } 117 break; 118 } 119 return volt; 120 } 121 122 u32 123 nvbios_volt_entry(struct nvkm_bios *bios, int idx, u8 *ver, u8 *len) 124 { 125 u8 hdr, cnt; 126 u32 volt = nvbios_volt_table(bios, ver, &hdr, &cnt, len); 127 if (volt && idx < cnt) { 128 volt = volt + hdr + (idx * *len); 129 return volt; 130 } 131 return 0; 132 } 133 134 u32 135 nvbios_volt_entry_parse(struct nvkm_bios *bios, int idx, u8 *ver, u8 *len, 136 struct nvbios_volt_entry *info) 137 { 138 u32 volt = nvbios_volt_entry(bios, idx, ver, len); 139 memset(info, 0x00, sizeof(*info)); 140 switch (!!volt * *ver) { 141 case 0x12: 142 case 0x20: 143 info->voltage = nvbios_rd08(bios, volt + 0x00) * 10000; 144 info->vid = nvbios_rd08(bios, volt + 0x01); 145 break; 146 case 0x30: 147 info->voltage = nvbios_rd08(bios, volt + 0x00) * 10000; 148 info->vid = nvbios_rd08(bios, volt + 0x01) >> 2; 149 break; 150 case 0x40: 151 break; 152 case 0x50: 153 info->voltage = nvbios_rd32(bios, volt) & 0x001fffff; 154 info->vid = (nvbios_rd32(bios, volt) >> 23) & 0xff; 155 break; 156 } 157 return volt; 158 } 159