diff options
Diffstat (limited to 'drivers/gpu/drm/nouveau/nvkm/subdev/volt/gk104.c')
| -rw-r--r-- | drivers/gpu/drm/nouveau/nvkm/subdev/volt/gk104.c | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/volt/gk104.c b/drivers/gpu/drm/nouveau/nvkm/subdev/volt/gk104.c new file mode 100644 index 000000000..1c744e029 --- /dev/null +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/volt/gk104.c @@ -0,0 +1,140 @@ +/* + * 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, 0x20340); + duty = nvkm_rd32(device, 0x20344); + + 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, 0x20340, div); + nvkm_wr32(device, 0x20344, 0x80000000 | 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, 0x122634, 0x0); + ret = nvkm_fuse_read(fuse, 0x3a8); + nvkm_wr32(device, 0x122634, 0x41); + 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, int index, 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, 0xff, &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, index, &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; +} |