| /* |
| * 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" |
| |
| struct nv50_therm_priv { |
| struct nouveau_therm_priv base; |
| }; |
| |
| static int |
| pwm_info(struct nouveau_therm *therm, int *line, int *ctrl, int *indx) |
| { |
| if (*line == 0x04) { |
| *ctrl = 0x00e100; |
| *line = 4; |
| *indx = 0; |
| } else |
| if (*line == 0x09) { |
| *ctrl = 0x00e100; |
| *line = 9; |
| *indx = 1; |
| } else |
| if (*line == 0x10) { |
| *ctrl = 0x00e28c; |
| *line = 0; |
| *indx = 0; |
| } else { |
| nv_error(therm, "unknown pwm ctrl for gpio %d\n", *line); |
| return -ENODEV; |
| } |
| |
| return 0; |
| } |
| |
| int |
| nv50_fan_pwm_ctrl(struct nouveau_therm *therm, int line, bool enable) |
| { |
| u32 data = enable ? 0x00000001 : 0x00000000; |
| int ctrl, id, ret = pwm_info(therm, &line, &ctrl, &id); |
| if (ret == 0) |
| nv_mask(therm, ctrl, 0x00010001 << line, data << line); |
| return ret; |
| } |
| |
| int |
| nv50_fan_pwm_get(struct nouveau_therm *therm, int line, u32 *divs, u32 *duty) |
| { |
| int ctrl, id, ret = pwm_info(therm, &line, &ctrl, &id); |
| if (ret) |
| return ret; |
| |
| if (nv_rd32(therm, ctrl) & (1 << line)) { |
| *divs = nv_rd32(therm, 0x00e114 + (id * 8)); |
| *duty = nv_rd32(therm, 0x00e118 + (id * 8)); |
| return 0; |
| } |
| |
| return -EINVAL; |
| } |
| |
| int |
| nv50_fan_pwm_set(struct nouveau_therm *therm, int line, u32 divs, u32 duty) |
| { |
| int ctrl, id, ret = pwm_info(therm, &line, &ctrl, &id); |
| if (ret) |
| return ret; |
| |
| nv_wr32(therm, 0x00e114 + (id * 8), divs); |
| nv_wr32(therm, 0x00e118 + (id * 8), duty | 0x80000000); |
| return 0; |
| } |
| |
| int |
| nv50_fan_pwm_clock(struct nouveau_therm *therm, int line) |
| { |
| int chipset = nv_device(therm)->chipset; |
| int crystal = nv_device(therm)->crystal; |
| int pwm_clock; |
| |
| /* determine the PWM source clock */ |
| if (chipset > 0x50 && chipset < 0x94) { |
| u8 pwm_div = nv_rd32(therm, 0x410c); |
| if (nv_rd32(therm, 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 = (crystal * 1000) >> pwm_div; |
| pwm_clock /= 20; |
| } |
| } else { |
| pwm_clock = (crystal * 1000) / 20; |
| } |
| |
| return pwm_clock; |
| } |
| |
| static void |
| nv50_sensor_setup(struct nouveau_therm *therm) |
| { |
| nv_mask(therm, 0x20010, 0x40000000, 0x0); |
| mdelay(20); /* wait for the temperature to stabilize */ |
| } |
| |
| static int |
| nv50_temp_get(struct nouveau_therm *therm) |
| { |
| struct nouveau_therm_priv *priv = (void *)therm; |
| struct nvbios_therm_sensor *sensor = &priv->bios_sensor; |
| int core_temp; |
| |
| core_temp = nv_rd32(therm, 0x20014) & 0x3fff; |
| |
| /* 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; |
| |
| core_temp = core_temp * sensor->slope_mult / sensor->slope_div; |
| core_temp = core_temp + sensor->offset_num / sensor->offset_den; |
| core_temp = core_temp + sensor->offset_constant - 8; |
| |
| /* reserve negative temperatures for errors */ |
| if (core_temp < 0) |
| core_temp = 0; |
| |
| return core_temp; |
| } |
| |
| static int |
| nv50_therm_ctor(struct nouveau_object *parent, |
| struct nouveau_object *engine, |
| struct nouveau_oclass *oclass, void *data, u32 size, |
| struct nouveau_object **pobject) |
| { |
| struct nv50_therm_priv *priv; |
| int ret; |
| |
| ret = nouveau_therm_create(parent, engine, oclass, &priv); |
| *pobject = nv_object(priv); |
| if (ret) |
| return ret; |
| |
| priv->base.base.pwm_ctrl = nv50_fan_pwm_ctrl; |
| priv->base.base.pwm_get = nv50_fan_pwm_get; |
| priv->base.base.pwm_set = nv50_fan_pwm_set; |
| priv->base.base.pwm_clock = nv50_fan_pwm_clock; |
| priv->base.base.temp_get = nv50_temp_get; |
| priv->base.sensor.program_alarms = nouveau_therm_program_alarms_polling; |
| nv_subdev(priv)->intr = nv40_therm_intr; |
| |
| return nouveau_therm_preinit(&priv->base.base); |
| } |
| |
| static int |
| nv50_therm_init(struct nouveau_object *object) |
| { |
| struct nouveau_therm *therm = (void *)object; |
| |
| nv50_sensor_setup(therm); |
| |
| return _nouveau_therm_init(object); |
| } |
| |
| struct nouveau_oclass |
| nv50_therm_oclass = { |
| .handle = NV_SUBDEV(THERM, 0x50), |
| .ofuncs = &(struct nouveau_ofuncs) { |
| .ctor = nv50_therm_ctor, |
| .dtor = _nouveau_therm_dtor, |
| .init = nv50_therm_init, |
| .fini = _nouveau_therm_fini, |
| }, |
| }; |