/*
* Copyright 2012 Nouveau Community
*
* 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: Martin Peres
*/
#include <subdev/bios.h>
#include <subdev/bios/bit.h>
#include <subdev/bios/volt.h>
u32
nvbios_volt_table(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len)
{
struct bit_entry bit_P;
u32 volt = 0;
if (!bit_entry(bios, 'P', &bit_P)) {
if (bit_P.version == 2)
volt = nvbios_rd32(bios, bit_P.offset + 0x0c);
else
if (bit_P.version == 1)
volt = nvbios_rd32(bios, bit_P.offset + 0x10);
if (volt) {
*ver = nvbios_rd08(bios, volt + 0);
switch (*ver) {
case 0x12:
*hdr = 5;
*cnt = nvbios_rd08(bios, volt + 2);
*len = nvbios_rd08(bios, volt + 1);
return volt;
case 0x20:
*hdr = nvbios_rd08(bios, volt + 1);
*cnt = nvbios_rd08(bios, volt + 2);
*len = nvbios_rd08(bios, volt + 3);
return volt;
case 0x30:
case 0x40:
case 0x50:
*hdr = nvbios_rd08(bios, volt + 1);
*cnt = nvbios_rd08(bios, volt + 3);
*len = nvbios_rd08(bios, volt + 2);
return volt;
}
}
}
return 0;
}
u32
nvbios_volt_parse(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len,
struct nvbios_volt *info)
{
u32 volt = nvbios_volt_table(bios, ver, hdr, cnt, len);
memset(info, 0x00, sizeof(*info));
switch (!!volt * *ver) {
case 0x12:
info->type = NVBIOS_VOLT_GPIO;
info->vidmask = nvbios_rd08(bios, volt + 0x04);
info->ranged = false;
break;
case 0x20:
info->type = NVBIOS_VOLT_GPIO;
info->vidmask = nvbios_rd08(bios, volt + 0x05);
info->ranged = false;
break;
case 0x30:
info->type = NVBIOS_VOLT_GPIO;
info->vidmask = nvbios_rd08(bios, volt + 0x04);
info->ranged = false;
break;
case 0x40:
info->type = NVBIOS_VOLT_GPIO;
info->base = nvbios_rd32(bios, volt + 0x04);
info->step = nvbios_rd16(bios, volt + 0x08);
info->vidmask = nvbios_rd08(bios, volt + 0x0b);
info->ranged = true; /* XXX: find the flag byte */
info->min = min(info->base,
info->base + info->step * info->vidmask);
info->max = nvbios_rd32(bios, volt + 0x0e);
if (!info->max)
info->max = max(info->base, info->base + info->step * info->vidmask);
break;
case 0x50:
info->min = nvbios_rd32(bios, volt + 0x0a);
info->max = nvbios_rd32(bios, volt + 0x0e);
info->base = nvbios_rd32(bios, volt + 0x12) & 0x00ffffff;
/* offset 4 seems to be a flag byte */
if (nvbios_rd32(bios, volt + 0x4) & 1) {
info->type = NVBIOS_VOLT_PWM;
info->pwm_freq = nvbios_rd32(bios, volt + 0x5) / 1000;
info->pwm_range = nvbios_rd32(bios, volt + 0x16);
} else {
info->type = NVBIOS_VOLT_GPIO;
info->vidmask = nvbios_rd08(bios, volt + 0x06);
info->step = nvbios_rd16(bios, volt + 0x16);
info->ranged =
!!(nvbios_rd08(bios, volt + 0x4) & 0x2);
}
break;
}
return volt;
}
u32
nvbios_volt_entry(struct nvkm_bios *bios, int idx, u8 *ver, u8 *len)
{
u8 hdr, cnt;
u32 volt = nvbios_volt_table(bios, ver, &hdr, &cnt, len);
if (volt && idx < cnt) {
volt = volt + hdr + (idx * *len);
return volt;
}
return 0;
}
u32
nvbios_volt_entry_parse(struct nvkm_bios *bios, int idx, u8 *ver, u8 *len,
struct nvbios_volt_entry *info)
{
u32 volt = nvbios_volt_entry(bios, idx, ver, len);
memset(info, 0x00, sizeof(*info));
switch (!!volt * *ver) {
case 0x12:
case 0x20:
info->voltage = nvbios_rd08(bios, volt + 0x00) * 10000;
info->vid = nvbios_rd08(bios, volt + 0x01);
break;
case 0x30:
info->voltage = nvbios_rd08(bios, volt + 0x00) * 10000;
info->vid = nvbios_rd08(bios, volt + 0x01) >> 2;
break;
case 0x40:
break;
case 0x50:
info->voltage = nvbios_rd32(bios, volt) & 0x001fffff;
info->vid = (nvbios_rd32(bios, volt) >> 23) & 0xff;
break;
}
return volt;
}
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