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 28u32 29nvbios_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 68u32 69nvbios_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 info->min = min(info->base, 97 info->base + info->step * info->vidmask); 98 info->max = nvbios_rd32(bios, volt + 0x0e); 99 if (!info->max) 100 info->max = max(info->base, info->base + info->step * info->vidmask); 101 break; 102 case 0x50: 103 info->min = nvbios_rd32(bios, volt + 0x0a); 104 info->max = nvbios_rd32(bios, volt + 0x0e); 105 info->base = nvbios_rd32(bios, volt + 0x12) & 0x00ffffff; 106 107 /* offset 4 seems to be a flag byte */ 108 if (nvbios_rd32(bios, volt + 0x4) & 1) { 109 info->type = NVBIOS_VOLT_PWM; 110 info->pwm_freq = nvbios_rd32(bios, volt + 0x5) / 1000; 111 info->pwm_range = nvbios_rd32(bios, volt + 0x16); 112 } else { 113 info->type = NVBIOS_VOLT_GPIO; 114 info->vidmask = nvbios_rd08(bios, volt + 0x06); 115 info->step = nvbios_rd16(bios, volt + 0x16); 116 info->ranged = 117 !!(nvbios_rd08(bios, volt + 0x4) & 0x2); 118 } 119 break; 120 } 121 return volt; 122} 123 124u32 125nvbios_volt_entry(struct nvkm_bios *bios, int idx, u8 *ver, u8 *len) 126{ 127 u8 hdr, cnt; 128 u32 volt = nvbios_volt_table(bios, ver, &hdr, &cnt, len); 129 if (volt && idx < cnt) { 130 volt = volt + hdr + (idx * *len); 131 return volt; 132 } 133 return 0; 134} 135 136u32 137nvbios_volt_entry_parse(struct nvkm_bios *bios, int idx, u8 *ver, u8 *len, 138 struct nvbios_volt_entry *info) 139{ 140 u32 volt = nvbios_volt_entry(bios, idx, ver, len); 141 memset(info, 0x00, sizeof(*info)); 142 switch (!!volt * *ver) { 143 case 0x12: 144 case 0x20: 145 info->voltage = nvbios_rd08(bios, volt + 0x00) * 10000; 146 info->vid = nvbios_rd08(bios, volt + 0x01); 147 break; 148 case 0x30: 149 info->voltage = nvbios_rd08(bios, volt + 0x00) * 10000; 150 info->vid = nvbios_rd08(bios, volt + 0x01) >> 2; 151 break; 152 case 0x40: 153 break; 154 case 0x50: 155 info->voltage = nvbios_rd32(bios, volt) & 0x001fffff; 156 info->vid = (nvbios_rd32(bios, volt) >> 23) & 0xff; 157 break; 158 } 159 return volt; 160} 161