/* * 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"
staticint
pwm_info(struct nvkm_therm *therm, int *line, int *ctrl, int *indx)
{ struct nvkm_subdev *subdev = &therm->subdev;
int
nv50_fan_pwm_ctrl(struct nvkm_therm *therm, int line, bool enable)
{ struct nvkm_device *device = therm->subdev.device;
u32 data = enable ? 0x00000001 : 0x00000000; int ctrl, id, ret = pwm_info(therm, &line, &ctrl, &id); if (ret == 0)
nvkm_mask(device, ctrl, 0x00010001 << line, data << line); return ret;
}
int
nv50_fan_pwm_get(struct nvkm_therm *therm, int line, u32 *divs, u32 *duty)
{ struct nvkm_device *device = therm->subdev.device; int ctrl, id, ret = pwm_info(therm, &line, &ctrl, &id); if (ret) return ret;
if (nvkm_rd32(device, ctrl) & (1 << line)) {
*divs = nvkm_rd32(device, 0x00e114 + (id * 8));
*duty = nvkm_rd32(device, 0x00e118 + (id * 8)); return 0;
}
return -EINVAL;
}
int
nv50_fan_pwm_set(struct nvkm_therm *therm, int line, u32 divs, u32 duty)
{ struct nvkm_device *device = therm->subdev.device; int ctrl, id, ret = pwm_info(therm, &line, &ctrl, &id); if (ret) return ret;
nvkm_wr32(device, 0x00e114 + (id * 8), divs);
nvkm_wr32(device, 0x00e118 + (id * 8), duty | 0x80000000); return 0;
}
int
nv50_fan_pwm_clock(struct nvkm_therm *therm, int line)
{ struct nvkm_device *device = therm->subdev.device; int pwm_clock;
/* determine the PWM source clock */ if (device->chipset > 0x50 && device->chipset < 0x94) {
u8 pwm_div = nvkm_rd32(device, 0x410c); if (nvkm_rd32(device, 0xc040) & 0x800000) { /* Use the HOST clock (100 MHz)
* Where does this constant(2.4) comes from? */
pwm_clock = (100000000 >> pwm_div) * 10 / 24;
} else { /* Where does this constant(20) comes from? */
pwm_clock = (device->crystal * 1000) >> pwm_div;
pwm_clock /= 20;
}
} else {
pwm_clock = (device->crystal * 1000) / 20;
}
return pwm_clock;
}
staticvoid
nv50_sensor_setup(struct nvkm_therm *therm)
{ struct nvkm_device *device = therm->subdev.device;
nvkm_mask(device, 0x20010, 0x40000000, 0x0);
mdelay(20); /* wait for the temperature to stabilize */
}
/* if the slope or the offset is unset, do no use the sensor */ if (!sensor->slope_div || !sensor->slope_mult ||
!sensor->offset_num || !sensor->offset_den) return -ENODEV;
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