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