/*
* Copyright 2015 Martin Peres
*
* 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 "priv.h"
#include <subdev/volt.h>
#include <subdev/gpio.h>
#include <subdev/bios.h>
#include <subdev/bios/volt.h>
#include <subdev/fuse.h>
#define gk104_volt(p) container_of((p), struct gk104_volt, base)
struct gk104_volt {
struct nvkm_volt base;
struct nvbios_volt bios;
};
static int
gk104_volt_get(struct nvkm_volt *base)
{
struct nvbios_volt *bios = &gk104_volt(base)->bios;
struct nvkm_device *device = base->subdev.device;
u32 div, duty;
div = nvkm_rd32(device, 0 x20340);
duty = nvkm_rd32(device, 0 x20344);
return bios->base + bios->pwm_range * duty / div;
}
static int
gk104_volt_set(struct nvkm_volt *base, u32 uv)
{
struct nvbios_volt *bios = &gk104_volt(base)->bios;
struct nvkm_device *device = base->subdev.device;
u32 div, duty;
/* the blob uses this crystal frequency, let's use it too. */
div = 27648000 / bios->pwm_freq;
duty = DIV_ROUND_UP((uv - bios->base) * div, bios->pwm_range);
nvkm_wr32(device, 0 x20340, div);
nvkm_wr32(device, 0 x20344, 0 x80000000 | duty);
return 0 ;
}
static int
gk104_volt_speedo_read(struct nvkm_volt *volt)
{
struct nvkm_device *device = volt->subdev.device;
struct nvkm_fuse *fuse = device->fuse;
int ret;
if (!fuse)
return -EINVAL;
nvkm_wr32(device, 0 x122634, 0 x0);
ret = nvkm_fuse_read(fuse, 0 x3a8);
nvkm_wr32(device, 0 x122634, 0 x41);
return ret;
}
static const struct nvkm_volt_func
gk104_volt_pwm = {
.oneinit = gf100_volt_oneinit,
.volt_get = gk104_volt_get,
.volt_set = gk104_volt_set,
.speedo_read = gk104_volt_speedo_read,
}, gk104_volt_gpio = {
.oneinit = gf100_volt_oneinit,
.vid_get = nvkm_voltgpio_get,
.vid_set = nvkm_voltgpio_set,
.speedo_read = gk104_volt_speedo_read,
};
int
gk104_volt_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst,
struct nvkm_volt **pvolt)
{
const struct nvkm_volt_func *volt_func = &gk104_volt_gpio;
struct dcb_gpio_func gpio;
struct nvbios_volt bios;
struct gk104_volt *volt;
u8 ver, hdr, cnt, len;
const char *mode;
if (!nvbios_volt_parse(device->bios, &ver, &hdr, &cnt, &len, &bios))
return 0 ;
if (!nvkm_gpio_find(device->gpio, 0 , DCB_GPIO_VID_PWM, 0 xff, &gpio) &&
bios.type == NVBIOS_VOLT_PWM) {
volt_func = &gk104_volt_pwm;
}
if (!(volt = kzalloc(sizeof (*volt), GFP_KERNEL)))
return -ENOMEM;
nvkm_volt_ctor(volt_func, device, type, inst, &volt->base);
*pvolt = &volt->base;
volt->bios = bios;
/* now that we have a subdev, we can show an error if we found through
* the voltage table that we were supposed to use the PWN mode but we
* did not find the right GPIO for it .
*/
if (bios.type == NVBIOS_VOLT_PWM && volt_func != &gk104_volt_pwm) {
nvkm_error(&volt->base.subdev,
"Type mismatch between the voltage table type and "
"the GPIO table. Fallback to GPIO mode.\n" );
}
if (volt_func == &gk104_volt_gpio) {
nvkm_voltgpio_init(&volt->base);
mode = "GPIO" ;
} else
mode = "PWM" ;
nvkm_debug(&volt->base.subdev, "Using %s mode\n" , mode);
return 0 ;
}
Messung V0.5 in Prozent C=98 H=100 G=98
¤ Dauer der Verarbeitung: 0.13 Sekunden
(vorverarbeitet am 2026-10-06)
¤
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