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