1 /* 2 * Copyright 2013 Red Hat Inc. 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: Ben Skeggs 23 */ 24 #include <subdev/bios.h> 25 #include <subdev/bios/bit.h> 26 #include <subdev/bios/cstep.h> 27 28 u32 29 nvbios_cstepTe(struct nvkm_bios *bios, 30 u8 *ver, u8 *hdr, u8 *cnt, u8 *len, u8 *xnr, u8 *xsz) 31 { 32 struct bit_entry bit_P; 33 u32 cstep = 0; 34 35 if (!bit_entry(bios, 'P', &bit_P)) { 36 if (bit_P.version == 2 && bit_P.length >= 0x38) 37 cstep = nvbios_rd32(bios, bit_P.offset + 0x34); 38 39 if (cstep) { 40 *ver = nvbios_rd08(bios, cstep + 0); 41 switch (*ver) { 42 case 0x10: 43 *hdr = nvbios_rd08(bios, cstep + 1); 44 *cnt = nvbios_rd08(bios, cstep + 3); 45 *len = nvbios_rd08(bios, cstep + 2); 46 *xnr = nvbios_rd08(bios, cstep + 5); 47 *xsz = nvbios_rd08(bios, cstep + 4); 48 return cstep; 49 default: 50 break; 51 } 52 } 53 } 54 55 return 0; 56 } 57 58 u32 59 nvbios_cstepEe(struct nvkm_bios *bios, int idx, u8 *ver, u8 *hdr) 60 { 61 u8 cnt, len, xnr, xsz; 62 u32 data = nvbios_cstepTe(bios, ver, hdr, &cnt, &len, &xnr, &xsz); 63 if (data && idx < cnt) { 64 data = data + *hdr + (idx * len); 65 *hdr = len; 66 return data; 67 } 68 return 0; 69 } 70 71 u32 72 nvbios_cstepEp(struct nvkm_bios *bios, int idx, u8 *ver, u8 *hdr, 73 struct nvbios_cstepE *info) 74 { 75 u32 data = nvbios_cstepEe(bios, idx, ver, hdr); 76 memset(info, 0x00, sizeof(*info)); 77 if (data) { 78 info->pstate = (nvbios_rd16(bios, data + 0x00) & 0x01e0) >> 5; 79 info->index = nvbios_rd08(bios, data + 0x03); 80 } 81 return data; 82 } 83 84 u32 85 nvbios_cstepEm(struct nvkm_bios *bios, u8 pstate, u8 *ver, u8 *hdr, 86 struct nvbios_cstepE *info) 87 { 88 u32 data, idx = 0; 89 while ((data = nvbios_cstepEp(bios, idx++, ver, hdr, info))) { 90 if (info->pstate == pstate) 91 break; 92 } 93 return data; 94 } 95 96 u32 97 nvbios_cstepXe(struct nvkm_bios *bios, int idx, u8 *ver, u8 *hdr) 98 { 99 u8 cnt, len, xnr, xsz; 100 u32 data = nvbios_cstepTe(bios, ver, hdr, &cnt, &len, &xnr, &xsz); 101 if (data && idx < xnr) { 102 data = data + *hdr + (cnt * len) + (idx * xsz); 103 *hdr = xsz; 104 return data; 105 } 106 return 0; 107 } 108 109 u32 110 nvbios_cstepXp(struct nvkm_bios *bios, int idx, u8 *ver, u8 *hdr, 111 struct nvbios_cstepX *info) 112 { 113 u32 data = nvbios_cstepXe(bios, idx, ver, hdr); 114 memset(info, 0x00, sizeof(*info)); 115 if (data) { 116 info->freq = nvbios_rd16(bios, data + 0x00) * 1000; 117 info->unkn[0] = nvbios_rd08(bios, data + 0x02); 118 info->unkn[1] = nvbios_rd08(bios, data + 0x03); 119 info->voltage = nvbios_rd08(bios, data + 0x04); 120 } 121 return data; 122 } 123