177 lines
4.8 KiB
C
177 lines
4.8 KiB
C
/*
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* Copyright 2012 Red Hat Inc.
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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: Ben Skeggs
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* Martin Peres
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*/
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#include "priv.h"
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static int
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pwm_info(struct nvkm_therm *therm, int *line, int *ctrl, int *indx)
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{
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struct nvkm_subdev *subdev = &therm->subdev;
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if (*line == 0x04) {
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*ctrl = 0x00e100;
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*line = 4;
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*indx = 0;
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} else
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if (*line == 0x09) {
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*ctrl = 0x00e100;
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*line = 9;
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*indx = 1;
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} else
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if (*line == 0x10) {
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*ctrl = 0x00e28c;
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*line = 0;
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*indx = 0;
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} else {
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nvkm_error(subdev, "unknown pwm ctrl for gpio %d\n", *line);
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return -ENODEV;
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}
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return 0;
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}
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int
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nv50_fan_pwm_ctrl(struct nvkm_therm *therm, int line, bool enable)
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{
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struct nvkm_device *device = therm->subdev.device;
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u32 data = enable ? 0x00000001 : 0x00000000;
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int ctrl, id, ret = pwm_info(therm, &line, &ctrl, &id);
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if (ret == 0)
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nvkm_mask(device, ctrl, 0x00010001 << line, data << line);
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return ret;
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}
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int
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nv50_fan_pwm_get(struct nvkm_therm *therm, int line, u32 *divs, u32 *duty)
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{
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struct nvkm_device *device = therm->subdev.device;
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int ctrl, id, ret = pwm_info(therm, &line, &ctrl, &id);
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if (ret)
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return ret;
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if (nvkm_rd32(device, ctrl) & (1 << line)) {
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*divs = nvkm_rd32(device, 0x00e114 + (id * 8));
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*duty = nvkm_rd32(device, 0x00e118 + (id * 8));
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return 0;
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}
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return -EINVAL;
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}
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int
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nv50_fan_pwm_set(struct nvkm_therm *therm, int line, u32 divs, u32 duty)
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{
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struct nvkm_device *device = therm->subdev.device;
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int ctrl, id, ret = pwm_info(therm, &line, &ctrl, &id);
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if (ret)
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return ret;
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nvkm_wr32(device, 0x00e114 + (id * 8), divs);
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nvkm_wr32(device, 0x00e118 + (id * 8), duty | 0x80000000);
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return 0;
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}
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int
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nv50_fan_pwm_clock(struct nvkm_therm *therm, int line)
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{
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struct nvkm_device *device = therm->subdev.device;
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int pwm_clock;
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/* determine the PWM source clock */
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if (device->chipset > 0x50 && device->chipset < 0x94) {
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u8 pwm_div = nvkm_rd32(device, 0x410c);
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if (nvkm_rd32(device, 0xc040) & 0x800000) {
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/* Use the HOST clock (100 MHz)
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* Where does this constant(2.4) comes from? */
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pwm_clock = (100000000 >> pwm_div) * 10 / 24;
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} else {
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/* Where does this constant(20) comes from? */
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pwm_clock = (device->crystal * 1000) >> pwm_div;
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pwm_clock /= 20;
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}
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} else {
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pwm_clock = (device->crystal * 1000) / 20;
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}
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return pwm_clock;
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}
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static void
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nv50_sensor_setup(struct nvkm_therm *therm)
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{
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struct nvkm_device *device = therm->subdev.device;
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nvkm_mask(device, 0x20010, 0x40000000, 0x0);
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mdelay(20); /* wait for the temperature to stabilize */
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}
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static int
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nv50_temp_get(struct nvkm_therm *therm)
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{
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struct nvkm_device *device = therm->subdev.device;
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struct nvbios_therm_sensor *sensor = &therm->bios_sensor;
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int core_temp;
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core_temp = nvkm_rd32(device, 0x20014) & 0x3fff;
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/* if the slope or the offset is unset, do no use the sensor */
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if (!sensor->slope_div || !sensor->slope_mult ||
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!sensor->offset_num || !sensor->offset_den)
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return -ENODEV;
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core_temp = core_temp * sensor->slope_mult / sensor->slope_div;
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core_temp = core_temp + sensor->offset_num / sensor->offset_den;
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core_temp = core_temp + sensor->offset_constant - 8;
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/* reserve negative temperatures for errors */
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if (core_temp < 0)
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core_temp = 0;
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return core_temp;
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}
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static void
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nv50_therm_init(struct nvkm_therm *therm)
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{
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nv50_sensor_setup(therm);
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}
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static const struct nvkm_therm_func
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nv50_therm = {
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.init = nv50_therm_init,
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.intr = nv40_therm_intr,
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.pwm_ctrl = nv50_fan_pwm_ctrl,
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.pwm_get = nv50_fan_pwm_get,
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.pwm_set = nv50_fan_pwm_set,
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.pwm_clock = nv50_fan_pwm_clock,
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.temp_get = nv50_temp_get,
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.program_alarms = nvkm_therm_program_alarms_polling,
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};
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int
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nv50_therm_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst,
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struct nvkm_therm **ptherm)
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{
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return nvkm_therm_new_(&nv50_therm, device, type, inst, ptherm);
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}
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