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 static int 27 pwm_info(struct nvkm_therm *therm, int line) 28 { 29 struct nvkm_subdev *subdev = &therm->subdev; 30 struct nvkm_device *device = subdev->device; 31 u32 gpio = nvkm_rd32(device, 0x00d610 + (line * 0x04)); 32 33 switch (gpio & 0x000000c0) { 34 case 0x00000000: /* normal mode, possibly pwm forced off by us */ 35 case 0x00000040: /* nvio special */ 36 switch (gpio & 0x0000001f) { 37 case 0x00: return 2; 38 case 0x19: return 1; 39 case 0x1c: return 0; 40 case 0x1e: return 2; 41 default: 42 break; 43 } 44 default: 45 break; 46 } 47 48 nvkm_error(subdev, "GPIO %d unknown PWM: %08x\n", line, gpio); 49 return -ENODEV; 50 } 51 52 static int 53 gf119_fan_pwm_ctrl(struct nvkm_therm *therm, int line, bool enable) 54 { 55 struct nvkm_device *device = therm->subdev.device; 56 u32 data = enable ? 0x00000040 : 0x00000000; 57 int indx = pwm_info(therm, line); 58 if (indx < 0) 59 return indx; 60 else if (indx < 2) 61 nvkm_mask(device, 0x00d610 + (line * 0x04), 0x000000c0, data); 62 /* nothing to do for indx == 2, it seems hardwired to PTHERM */ 63 return 0; 64 } 65 66 static int 67 gf119_fan_pwm_get(struct nvkm_therm *therm, int line, u32 *divs, u32 *duty) 68 { 69 struct nvkm_device *device = therm->subdev.device; 70 int indx = pwm_info(therm, line); 71 if (indx < 0) 72 return indx; 73 else if (indx < 2) { 74 if (nvkm_rd32(device, 0x00d610 + (line * 0x04)) & 0x00000040) { 75 *divs = nvkm_rd32(device, 0x00e114 + (indx * 8)); 76 *duty = nvkm_rd32(device, 0x00e118 + (indx * 8)); 77 return 0; 78 } 79 } else if (indx == 2) { 80 *divs = nvkm_rd32(device, 0x0200d8) & 0x1fff; 81 *duty = nvkm_rd32(device, 0x0200dc) & 0x1fff; 82 return 0; 83 } 84 85 return -EINVAL; 86 } 87 88 static int 89 gf119_fan_pwm_set(struct nvkm_therm *therm, int line, u32 divs, u32 duty) 90 { 91 struct nvkm_device *device = therm->subdev.device; 92 int indx = pwm_info(therm, line); 93 if (indx < 0) 94 return indx; 95 else if (indx < 2) { 96 nvkm_wr32(device, 0x00e114 + (indx * 8), divs); 97 nvkm_wr32(device, 0x00e118 + (indx * 8), duty | 0x80000000); 98 } else if (indx == 2) { 99 nvkm_mask(device, 0x0200d8, 0x1fff, divs); /* keep the high bits */ 100 nvkm_wr32(device, 0x0200dc, duty | 0x40000000); 101 } 102 return 0; 103 } 104 105 static int 106 gf119_fan_pwm_clock(struct nvkm_therm *therm, int line) 107 { 108 struct nvkm_device *device = therm->subdev.device; 109 int indx = pwm_info(therm, line); 110 if (indx < 0) 111 return 0; 112 else if (indx < 2) 113 return (device->crystal * 1000) / 20; 114 else 115 return device->crystal * 1000 / 10; 116 } 117 118 void 119 gf119_therm_init(struct nvkm_therm *therm) 120 { 121 struct nvkm_device *device = therm->subdev.device; 122 123 g84_sensor_setup(therm); 124 125 /* enable fan tach, count revolutions per-second */ 126 nvkm_mask(device, 0x00e720, 0x00000003, 0x00000002); 127 if (therm->fan->tach.func != DCB_GPIO_UNUSED) { 128 nvkm_mask(device, 0x00d79c, 0x000000ff, therm->fan->tach.line); 129 nvkm_wr32(device, 0x00e724, device->crystal * 1000); 130 nvkm_mask(device, 0x00e720, 0x00000001, 0x00000001); 131 } 132 nvkm_mask(device, 0x00e720, 0x00000002, 0x00000000); 133 } 134 135 static const struct nvkm_therm_func 136 gf119_therm = { 137 .init = gf119_therm_init, 138 .fini = g84_therm_fini, 139 .pwm_ctrl = gf119_fan_pwm_ctrl, 140 .pwm_get = gf119_fan_pwm_get, 141 .pwm_set = gf119_fan_pwm_set, 142 .pwm_clock = gf119_fan_pwm_clock, 143 .temp_get = g84_temp_get, 144 .fan_sense = gt215_therm_fan_sense, 145 .program_alarms = nvkm_therm_program_alarms_polling, 146 }; 147 148 int 149 gf119_therm_new(struct nvkm_device *device, int index, 150 struct nvkm_therm **ptherm) 151 { 152 return nvkm_therm_new_(&gf119_therm, device, index, ptherm); 153 } 154