| /* |
| * 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/object.h> |
| #include <core/device.h> |
| #include <subdev/gpio.h> |
| #include <subdev/timer.h> |
| |
| int |
| nouveau_therm_fan_get(struct nouveau_therm *therm) |
| { |
| struct nouveau_therm_priv *priv = (void *)therm; |
| struct nouveau_gpio *gpio = nouveau_gpio(therm); |
| struct dcb_gpio_func func; |
| int card_type = nv_device(therm)->card_type; |
| u32 divs, duty; |
| int ret; |
| |
| if (!priv->fan.pwm_get) |
| return -ENODEV; |
| |
| ret = gpio->find(gpio, 0, DCB_GPIO_PWM_FAN, 0xff, &func); |
| if (ret == 0) { |
| ret = priv->fan.pwm_get(therm, func.line, &divs, &duty); |
| if (ret == 0 && divs) { |
| divs = max(divs, duty); |
| if (card_type <= NV_40 || (func.log[0] & 1)) |
| duty = divs - duty; |
| return (duty * 100) / divs; |
| } |
| |
| return gpio->get(gpio, 0, func.func, func.line) * 100; |
| } |
| |
| return -ENODEV; |
| } |
| |
| int |
| nouveau_therm_fan_set(struct nouveau_therm *therm, int percent) |
| { |
| struct nouveau_therm_priv *priv = (void *)therm; |
| struct nouveau_gpio *gpio = nouveau_gpio(therm); |
| struct dcb_gpio_func func; |
| int card_type = nv_device(therm)->card_type; |
| u32 divs, duty; |
| int ret; |
| |
| if (priv->fan.mode == FAN_CONTROL_NONE) |
| return -EINVAL; |
| |
| if (!priv->fan.pwm_set) |
| return -ENODEV; |
| |
| if (percent < priv->bios_fan.min_duty) |
| percent = priv->bios_fan.min_duty; |
| if (percent > priv->bios_fan.max_duty) |
| percent = priv->bios_fan.max_duty; |
| |
| ret = gpio->find(gpio, 0, DCB_GPIO_PWM_FAN, 0xff, &func); |
| if (ret == 0) { |
| divs = priv->bios_perf_fan.pwm_divisor; |
| if (priv->bios_fan.pwm_freq) { |
| divs = 1; |
| if (priv->fan.pwm_clock) |
| divs = priv->fan.pwm_clock(therm); |
| divs /= priv->bios_fan.pwm_freq; |
| } |
| |
| duty = ((divs * percent) + 99) / 100; |
| if (card_type <= NV_40 || (func.log[0] & 1)) |
| duty = divs - duty; |
| |
| ret = priv->fan.pwm_set(therm, func.line, divs, duty); |
| return ret; |
| } |
| |
| return -ENODEV; |
| } |
| |
| int |
| nouveau_therm_fan_sense(struct nouveau_therm *therm) |
| { |
| struct nouveau_timer *ptimer = nouveau_timer(therm); |
| struct nouveau_gpio *gpio = nouveau_gpio(therm); |
| struct dcb_gpio_func func; |
| u32 cycles, cur, prev; |
| u64 start, end, tach; |
| |
| if (gpio->find(gpio, 0, DCB_GPIO_FAN_SENSE, 0xff, &func)) |
| return -ENODEV; |
| |
| /* Time a complete rotation and extrapolate to RPM: |
| * When the fan spins, it changes the value of GPIO FAN_SENSE. |
| * We get 4 changes (0 -> 1 -> 0 -> 1) per complete rotation. |
| */ |
| start = ptimer->read(ptimer); |
| prev = gpio->get(gpio, 0, func.func, func.line); |
| cycles = 0; |
| do { |
| usleep_range(500, 1000); /* supports 0 < rpm < 7500 */ |
| |
| cur = gpio->get(gpio, 0, func.func, func.line); |
| if (prev != cur) { |
| if (!start) |
| start = ptimer->read(ptimer); |
| cycles++; |
| prev = cur; |
| } |
| } while (cycles < 5 && ptimer->read(ptimer) - start < 250000000); |
| end = ptimer->read(ptimer); |
| |
| if (cycles == 5) { |
| tach = (u64)60000000000ULL; |
| do_div(tach, (end - start)); |
| return tach; |
| } else |
| return 0; |
| } |
| |
| int |
| nouveau_therm_fan_set_mode(struct nouveau_therm *therm, |
| enum nouveau_therm_fan_mode mode) |
| { |
| struct nouveau_therm_priv *priv = (void *)therm; |
| |
| if (priv->fan.mode == mode) |
| return 0; |
| |
| if (mode < FAN_CONTROL_NONE || mode >= FAN_CONTROL_NR) |
| return -EINVAL; |
| |
| switch (mode) |
| { |
| case FAN_CONTROL_NONE: |
| nv_info(therm, "switch fan to no-control mode\n"); |
| break; |
| case FAN_CONTROL_MANUAL: |
| nv_info(therm, "switch fan to manual mode\n"); |
| break; |
| case FAN_CONTROL_NR: |
| break; |
| } |
| |
| priv->fan.mode = mode; |
| return 0; |
| } |
| |
| int |
| nouveau_therm_fan_user_get(struct nouveau_therm *therm) |
| { |
| return nouveau_therm_fan_get(therm); |
| } |
| |
| int |
| nouveau_therm_fan_user_set(struct nouveau_therm *therm, int percent) |
| { |
| struct nouveau_therm_priv *priv = (void *)therm; |
| |
| if (priv->fan.mode != FAN_CONTROL_MANUAL) |
| return -EINVAL; |
| |
| return nouveau_therm_fan_set(therm, percent); |
| } |
| |
| void |
| nouveau_therm_fan_set_defaults(struct nouveau_therm *therm) |
| { |
| struct nouveau_therm_priv *priv = (void *)therm; |
| |
| priv->bios_fan.pwm_freq = 0; |
| priv->bios_fan.min_duty = 0; |
| priv->bios_fan.max_duty = 100; |
| } |
| |
| |
| static void |
| nouveau_therm_fan_safety_checks(struct nouveau_therm *therm) |
| { |
| struct nouveau_therm_priv *priv = (void *)therm; |
| |
| if (priv->bios_fan.min_duty > 100) |
| priv->bios_fan.min_duty = 100; |
| if (priv->bios_fan.max_duty > 100) |
| priv->bios_fan.max_duty = 100; |
| |
| if (priv->bios_fan.min_duty > priv->bios_fan.max_duty) |
| priv->bios_fan.min_duty = priv->bios_fan.max_duty; |
| } |
| |
| int nouveau_fan_pwm_clock_dummy(struct nouveau_therm *therm) |
| { |
| return 1; |
| } |
| |
| int |
| nouveau_therm_fan_ctor(struct nouveau_therm *therm) |
| { |
| struct nouveau_therm_priv *priv = (void *)therm; |
| struct nouveau_bios *bios = nouveau_bios(therm); |
| |
| nouveau_therm_fan_set_defaults(therm); |
| nvbios_perf_fan_parse(bios, &priv->bios_perf_fan); |
| if (nvbios_therm_fan_parse(bios, &priv->bios_fan)) |
| nv_error(therm, "parsing the thermal table failed\n"); |
| nouveau_therm_fan_safety_checks(therm); |
| |
| nouveau_therm_fan_set_mode(therm, FAN_CONTROL_NONE); |
| |
| return 0; |
| } |