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/*
* 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;
}
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