1 /* 2 * Copyright 2012 Red Hat Inc. 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining a 5 * copy of this software and associated documentation files (the "Software"), 6 * to deal in the Software without restriction, including without limitation 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 8 * and/or sell copies of the Software, and to permit persons to whom the 9 * Software is furnished to do so, subject to the following conditions: 10 * 11 * The above copyright notice and this permission notice shall be included in 12 * all copies or substantial portions of the Software. 13 * 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 20 * OTHER DEALINGS IN THE SOFTWARE. 21 * 22 * Authors: Ben Skeggs 23 */ 24 #include "priv.h" 25 26 #include <subdev/gpio.h> 27 28 int 29 gt215_therm_fan_sense(struct nvkm_therm *therm) 30 { 31 struct nvkm_device *device = therm->subdev.device; 32 u32 tach = nvkm_rd32(device, 0x00e728) & 0x0000ffff; 33 u32 ctrl = nvkm_rd32(device, 0x00e720); 34 if (ctrl & 0x00000001) 35 return tach * 60 / 2; 36 return -ENODEV; 37 } 38 39 static int 40 gt215_therm_init(struct nvkm_object *object) 41 { 42 struct nvkm_therm_priv *therm = (void *)object; 43 struct nvkm_device *device = therm->base.subdev.device; 44 struct dcb_gpio_func *tach = &therm->fan->tach; 45 int ret; 46 47 ret = nvkm_therm_init(&therm->base); 48 if (ret) 49 return ret; 50 51 g84_sensor_setup(&therm->base); 52 53 /* enable fan tach, count revolutions per-second */ 54 nvkm_mask(device, 0x00e720, 0x00000003, 0x00000002); 55 if (tach->func != DCB_GPIO_UNUSED) { 56 nvkm_wr32(device, 0x00e724, nv_device(therm)->crystal * 1000); 57 nvkm_mask(device, 0x00e720, 0x001f0000, tach->line << 16); 58 nvkm_mask(device, 0x00e720, 0x00000001, 0x00000001); 59 } 60 nvkm_mask(device, 0x00e720, 0x00000002, 0x00000000); 61 62 return 0; 63 } 64 65 static int 66 gt215_therm_ctor(struct nvkm_object *parent, struct nvkm_object *engine, 67 struct nvkm_oclass *oclass, void *data, u32 size, 68 struct nvkm_object **pobject) 69 { 70 struct nvkm_therm_priv *therm; 71 int ret; 72 73 ret = nvkm_therm_create(parent, engine, oclass, &therm); 74 *pobject = nv_object(therm); 75 if (ret) 76 return ret; 77 78 therm->base.pwm_ctrl = nv50_fan_pwm_ctrl; 79 therm->base.pwm_get = nv50_fan_pwm_get; 80 therm->base.pwm_set = nv50_fan_pwm_set; 81 therm->base.pwm_clock = nv50_fan_pwm_clock; 82 therm->base.temp_get = g84_temp_get; 83 therm->base.fan_sense = gt215_therm_fan_sense; 84 therm->sensor.program_alarms = nvkm_therm_program_alarms_polling; 85 return nvkm_therm_preinit(&therm->base); 86 } 87 88 struct nvkm_oclass 89 gt215_therm_oclass = { 90 .handle = NV_SUBDEV(THERM, 0xa3), 91 .ofuncs = &(struct nvkm_ofuncs) { 92 .ctor = gt215_therm_ctor, 93 .dtor = _nvkm_therm_dtor, 94 .init = gt215_therm_init, 95 .fini = g84_therm_fini, 96 }, 97 }; 98