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->type = NVBIOS_VOLT_GPIO; 77 info->vidmask = nvbios_rd08(bios, volt + 0x04); 78 break; 79 case 0x20: 80 info->type = NVBIOS_VOLT_GPIO; 81 info->vidmask = nvbios_rd08(bios, volt + 0x05); 82 break; 83 case 0x30: 84 info->type = NVBIOS_VOLT_GPIO; 85 info->vidmask = nvbios_rd08(bios, volt + 0x04); 86 break; 87 case 0x40: 88 info->type = NVBIOS_VOLT_GPIO; 89 info->base = nvbios_rd32(bios, volt + 0x04); 90 info->step = nvbios_rd16(bios, volt + 0x08); 91 info->vidmask = nvbios_rd08(bios, volt + 0x0b); 92 /*XXX*/ 93 info->min = 0; 94 info->max = info->base; 95 break; 96 case 0x50: 97 info->min = nvbios_rd32(bios, volt + 0x0a); 98 info->max = nvbios_rd32(bios, volt + 0x0e); 99 info->base = nvbios_rd32(bios, volt + 0x12) & 0x00ffffff; 100 101 /* offset 4 seems to be a flag byte */ 102 if (nvbios_rd32(bios, volt + 0x4) & 1) { 103 info->type = NVBIOS_VOLT_PWM; 104 info->pwm_freq = nvbios_rd32(bios, volt + 0x5) / 1000; 105 info->pwm_range = nvbios_rd32(bios, volt + 0x16); 106 } else { 107 info->type = NVBIOS_VOLT_GPIO; 108 info->vidmask = nvbios_rd08(bios, volt + 0x06); 109 info->step = nvbios_rd16(bios, volt + 0x16); 110 } 111 break; 112 } 113 return volt; 114 } 115 116 u16 117 nvbios_volt_entry(struct nvkm_bios *bios, int idx, u8 *ver, u8 *len) 118 { 119 u8 hdr, cnt; 120 u16 volt = nvbios_volt_table(bios, ver, &hdr, &cnt, len); 121 if (volt && idx < cnt) { 122 volt = volt + hdr + (idx * *len); 123 return volt; 124 } 125 return 0x0000; 126 } 127 128 u16 129 nvbios_volt_entry_parse(struct nvkm_bios *bios, int idx, u8 *ver, u8 *len, 130 struct nvbios_volt_entry *info) 131 { 132 u16 volt = nvbios_volt_entry(bios, idx, ver, len); 133 memset(info, 0x00, sizeof(*info)); 134 switch (!!volt * *ver) { 135 case 0x12: 136 case 0x20: 137 info->voltage = nvbios_rd08(bios, volt + 0x00) * 10000; 138 info->vid = nvbios_rd08(bios, volt + 0x01); 139 break; 140 case 0x30: 141 info->voltage = nvbios_rd08(bios, volt + 0x00) * 10000; 142 info->vid = nvbios_rd08(bios, volt + 0x01) >> 2; 143 break; 144 case 0x40: 145 case 0x50: 146 break; 147 } 148 return volt; 149 } 150