| /* |
| * Copyright 2013 Red Hat Inc. |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a |
| * copy of this software and associated documentation files (the "Software"), |
| * to deal in the Software without restriction, including without limitation |
| * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| * and/or sell copies of the Software, and to permit persons to whom the |
| * Software is furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included in |
| * all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR |
| * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
| * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
| * OTHER DEALINGS IN THE SOFTWARE. |
| * |
| * Authors: Ben Skeggs |
| */ |
| #include <subdev/bios.h> |
| #include <subdev/bios/bit.h> |
| #include <subdev/bios/cstep.h> |
| |
| u32 |
| nvbios_cstepTe(struct nvkm_bios *bios, |
| u8 *ver, u8 *hdr, u8 *cnt, u8 *len, u8 *xnr, u8 *xsz) |
| { |
| struct bit_entry bit_P; |
| u32 cstep = 0; |
| |
| if (!bit_entry(bios, 'P', &bit_P)) { |
| if (bit_P.version == 2 && bit_P.length >= 0x38) |
| cstep = nvbios_rd32(bios, bit_P.offset + 0x34); |
| |
| if (cstep) { |
| *ver = nvbios_rd08(bios, cstep + 0); |
| switch (*ver) { |
| case 0x10: |
| *hdr = nvbios_rd08(bios, cstep + 1); |
| *cnt = nvbios_rd08(bios, cstep + 3); |
| *len = nvbios_rd08(bios, cstep + 2); |
| *xnr = nvbios_rd08(bios, cstep + 5); |
| *xsz = nvbios_rd08(bios, cstep + 4); |
| return cstep; |
| default: |
| break; |
| } |
| } |
| } |
| |
| return 0; |
| } |
| |
| u32 |
| nvbios_cstepEe(struct nvkm_bios *bios, int idx, u8 *ver, u8 *hdr) |
| { |
| u8 cnt, len, xnr, xsz; |
| u32 data = nvbios_cstepTe(bios, ver, hdr, &cnt, &len, &xnr, &xsz); |
| if (data && idx < cnt) { |
| data = data + *hdr + (idx * len); |
| *hdr = len; |
| return data; |
| } |
| return 0; |
| } |
| |
| u32 |
| nvbios_cstepEp(struct nvkm_bios *bios, int idx, u8 *ver, u8 *hdr, |
| struct nvbios_cstepE *info) |
| { |
| u32 data = nvbios_cstepEe(bios, idx, ver, hdr); |
| memset(info, 0x00, sizeof(*info)); |
| if (data) { |
| info->pstate = (nvbios_rd16(bios, data + 0x00) & 0x01e0) >> 5; |
| info->index = nvbios_rd08(bios, data + 0x03); |
| } |
| return data; |
| } |
| |
| u32 |
| nvbios_cstepEm(struct nvkm_bios *bios, u8 pstate, u8 *ver, u8 *hdr, |
| struct nvbios_cstepE *info) |
| { |
| u32 data, idx = 0; |
| while ((data = nvbios_cstepEp(bios, idx++, ver, hdr, info))) { |
| if (info->pstate == pstate) |
| break; |
| } |
| return data; |
| } |
| |
| u32 |
| nvbios_cstepXe(struct nvkm_bios *bios, int idx, u8 *ver, u8 *hdr) |
| { |
| u8 cnt, len, xnr, xsz; |
| u32 data = nvbios_cstepTe(bios, ver, hdr, &cnt, &len, &xnr, &xsz); |
| if (data && idx < xnr) { |
| data = data + *hdr + (cnt * len) + (idx * xsz); |
| *hdr = xsz; |
| return data; |
| } |
| return 0; |
| } |
| |
| u32 |
| nvbios_cstepXp(struct nvkm_bios *bios, int idx, u8 *ver, u8 *hdr, |
| struct nvbios_cstepX *info) |
| { |
| u32 data = nvbios_cstepXe(bios, idx, ver, hdr); |
| memset(info, 0x00, sizeof(*info)); |
| if (data) { |
| info->freq = nvbios_rd16(bios, data + 0x00) * 1000; |
| info->unkn[0] = nvbios_rd08(bios, data + 0x02); |
| info->unkn[1] = nvbios_rd08(bios, data + 0x03); |
| info->voltage = nvbios_rd08(bios, data + 0x04); |
| } |
| return data; |
| } |
