diff options
Diffstat (limited to 'drivers/gpu/drm/nouveau/nvkm/subdev/therm/fanpwm.c')
| -rw-r--r-- | drivers/gpu/drm/nouveau/nvkm/subdev/therm/fanpwm.c | 113 |
1 files changed, 113 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/therm/fanpwm.c b/drivers/gpu/drm/nouveau/nvkm/subdev/therm/fanpwm.c new file mode 100644 index 000000000000..bde5ceaeb70a --- /dev/null +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/therm/fanpwm.c @@ -0,0 +1,113 @@ +/* + * Copyright 2012 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 + * Martin Peres + */ +#include "priv.h" + +#include <core/device.h> +#include <core/option.h> +#include <subdev/bios.h> +#include <subdev/bios/fan.h> +#include <subdev/gpio.h> + +struct nvkm_fanpwm_priv { + struct nvkm_fan base; + struct dcb_gpio_func func; +}; + +static int +nvkm_fanpwm_get(struct nvkm_therm *therm) +{ + struct nvkm_therm_priv *tpriv = (void *)therm; + struct nvkm_fanpwm_priv *priv = (void *)tpriv->fan; + struct nvkm_gpio *gpio = nvkm_gpio(therm); + int card_type = nv_device(therm)->card_type; + u32 divs, duty; + int ret; + + ret = therm->pwm_get(therm, priv->func.line, &divs, &duty); + if (ret == 0 && divs) { + divs = max(divs, duty); + if (card_type <= NV_40 || (priv->func.log[0] & 1)) + duty = divs - duty; + return (duty * 100) / divs; + } + + return gpio->get(gpio, 0, priv->func.func, priv->func.line) * 100; +} + +static int +nvkm_fanpwm_set(struct nvkm_therm *therm, int percent) +{ + struct nvkm_therm_priv *tpriv = (void *)therm; + struct nvkm_fanpwm_priv *priv = (void *)tpriv->fan; + int card_type = nv_device(therm)->card_type; + u32 divs, duty; + int ret; + + divs = priv->base.perf.pwm_divisor; + if (priv->base.bios.pwm_freq) { + divs = 1; + if (therm->pwm_clock) + divs = therm->pwm_clock(therm, priv->func.line); + divs /= priv->base.bios.pwm_freq; + } + + duty = ((divs * percent) + 99) / 100; + if (card_type <= NV_40 || (priv->func.log[0] & 1)) + duty = divs - duty; + + ret = therm->pwm_set(therm, priv->func.line, divs, duty); + if (ret == 0) + ret = therm->pwm_ctrl(therm, priv->func.line, true); + return ret; +} + +int +nvkm_fanpwm_create(struct nvkm_therm *therm, struct dcb_gpio_func *func) +{ + struct nvkm_device *device = nv_device(therm); + struct nvkm_therm_priv *tpriv = (void *)therm; + struct nvkm_bios *bios = nvkm_bios(therm); + struct nvkm_fanpwm_priv *priv; + struct nvbios_therm_fan fan; + u32 divs, duty; + + nvbios_fan_parse(bios, &fan); + + if (!nvkm_boolopt(device->cfgopt, "NvFanPWM", func->param) || + !therm->pwm_ctrl || fan.type == NVBIOS_THERM_FAN_TOGGLE || + therm->pwm_get(therm, func->line, &divs, &duty) == -ENODEV) + return -ENODEV; + + priv = kzalloc(sizeof(*priv), GFP_KERNEL); + tpriv->fan = &priv->base; + if (!priv) + return -ENOMEM; + + priv->base.type = "PWM"; + priv->base.get = nvkm_fanpwm_get; + priv->base.set = nvkm_fanpwm_set; + priv->func = *func; + return 0; +} |