168651Skris/* $NetBSD: nouveau_nvkm_subdev_bios_cstep.c,v 1.3 2021/12/18 23:45:38 riastradh Exp $ */ 268651Skris 368651Skris/* 468651Skris * Copyright 2013 Red Hat Inc. 568651Skris * 668651Skris * Permission is hereby granted, free of charge, to any person obtaining a 768651Skris * copy of this software and associated documentation files (the "Software"), 868651Skris * to deal in the Software without restriction, including without limitation 968651Skris * the rights to use, copy, modify, merge, publish, distribute, sublicense, 1068651Skris * and/or sell copies of the Software, and to permit persons to whom the 1168651Skris * Software is furnished to do so, subject to the following conditions: 1268651Skris * 1368651Skris * The above copyright notice and this permission notice shall be included in 1468651Skris * all copies or substantial portions of the Software. 1568651Skris * 1676866Skris * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 1768651Skris * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 1876866Skris * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 1976866Skris * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 2076866Skris * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 2176866Skris * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 2276866Skris * OTHER DEALINGS IN THE SOFTWARE. 2376866Skris * 2476866Skris * Authors: Ben Skeggs 2576866Skris */ 2676866Skris#include <sys/cdefs.h> 2776866Skris__KERNEL_RCSID(0, "$NetBSD: nouveau_nvkm_subdev_bios_cstep.c,v 1.3 2021/12/18 23:45:38 riastradh Exp $"); 28100928Snectar 29100928Snectar#include <subdev/bios.h> 30100928Snectar#include <subdev/bios/bit.h> 31100928Snectar#include <subdev/bios/cstep.h> 32100928Snectar 33100928Snectaru32 34100928Snectarnvbios_cstepTe(struct nvkm_bios *bios, 35100928Snectar u8 *ver, u8 *hdr, u8 *cnt, u8 *len, u8 *xnr, u8 *xsz) 36100928Snectar{ 37100928Snectar struct bit_entry bit_P; 38100928Snectar u32 cstep = 0; 39100928Snectar 40100928Snectar if (!bit_entry(bios, 'P', &bit_P)) { 41100928Snectar if (bit_P.version == 2 && bit_P.length >= 0x38) 42237657Sjkim cstep = nvbios_rd32(bios, bit_P.offset + 0x34); 43237657Sjkim 44237657Sjkim if (cstep) { 45237657Sjkim *ver = nvbios_rd08(bios, cstep + 0); 46237657Sjkim switch (*ver) { 47237657Sjkim case 0x10: 48237657Sjkim *hdr = nvbios_rd08(bios, cstep + 1); 49237657Sjkim *cnt = nvbios_rd08(bios, cstep + 3); 50237657Sjkim *len = nvbios_rd08(bios, cstep + 2); 51237657Sjkim *xnr = nvbios_rd08(bios, cstep + 5); 52100928Snectar *xsz = nvbios_rd08(bios, cstep + 4); 5368651Skris return cstep; 5468651Skris default: 5568651Skris break; 5668651Skris } 5768651Skris } 5868651Skris } 5968651Skris 6068651Skris return 0; 6168651Skris} 6268651Skris 6368651Skrisu32 6468651Skrisnvbios_cstepEe(struct nvkm_bios *bios, int idx, u8 *ver, u8 *hdr) 6568651Skris{ 6668651Skris u8 cnt, len, xnr, xsz; 6768651Skris u32 data = nvbios_cstepTe(bios, ver, hdr, &cnt, &len, &xnr, &xsz); 6868651Skris if (data && idx < cnt) { 6968651Skris data = data + *hdr + (idx * len); 7068651Skris *hdr = len; 7176866Skris return data; 72100928Snectar } 73100928Snectar return 0; 7468651Skris} 7568651Skris 76u32 77nvbios_cstepEp(struct nvkm_bios *bios, int idx, u8 *ver, u8 *hdr, 78 struct nvbios_cstepE *info) 79{ 80 u32 data = nvbios_cstepEe(bios, idx, ver, hdr); 81 memset(info, 0x00, sizeof(*info)); 82 if (data) { 83 info->pstate = (nvbios_rd16(bios, data + 0x00) & 0x01e0) >> 5; 84 info->index = nvbios_rd08(bios, data + 0x03); 85 } 86 return data; 87} 88 89u32 90nvbios_cstepEm(struct nvkm_bios *bios, u8 pstate, u8 *ver, u8 *hdr, 91 struct nvbios_cstepE *info) 92{ 93 u32 data, idx = 0; 94 while ((data = nvbios_cstepEp(bios, idx++, ver, hdr, info))) { 95 if (info->pstate == pstate) 96 break; 97 } 98 return data; 99} 100 101u32 102nvbios_cstepXe(struct nvkm_bios *bios, int idx, u8 *ver, u8 *hdr) 103{ 104 u8 cnt, len, xnr, xsz; 105 u32 data = nvbios_cstepTe(bios, ver, hdr, &cnt, &len, &xnr, &xsz); 106 if (data && idx < xnr) { 107 data = data + *hdr + (cnt * len) + (idx * xsz); 108 *hdr = xsz; 109 return data; 110 } 111 return 0; 112} 113 114u32 115nvbios_cstepXp(struct nvkm_bios *bios, int idx, u8 *ver, u8 *hdr, 116 struct nvbios_cstepX *info) 117{ 118 u32 data = nvbios_cstepXe(bios, idx, ver, hdr); 119 memset(info, 0x00, sizeof(*info)); 120 if (data) { 121 info->freq = nvbios_rd16(bios, data + 0x00) * 1000; 122 info->unkn[0] = nvbios_rd08(bios, data + 0x02); 123 info->unkn[1] = nvbios_rd08(bios, data + 0x03); 124 info->voltage = nvbios_rd08(bios, data + 0x04); 125 } 126 return data; 127} 128