1 | /* $NetBSD: nouveau_subdev_therm_nv50.c,v 1.1.1.1 2014/08/06 12:36:32 riastradh Exp $ */ |
2 | |
3 | /* |
4 | * Copyright 2012 Red Hat Inc. |
5 | * |
6 | * Permission is hereby granted, free of charge, to any person obtaining a |
7 | * copy of this software and associated documentation files (the "Software"), |
8 | * to deal in the Software without restriction, including without limitation |
9 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
10 | * and/or sell copies of the Software, and to permit persons to whom the |
11 | * Software is furnished to do so, subject to the following conditions: |
12 | * |
13 | * The above copyright notice and this permission notice shall be included in |
14 | * all copies or substantial portions of the Software. |
15 | * |
16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
19 | * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR |
20 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
21 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
22 | * OTHER DEALINGS IN THE SOFTWARE. |
23 | * |
24 | * Authors: Ben Skeggs |
25 | * Martin Peres |
26 | */ |
27 | |
28 | #include <sys/cdefs.h> |
29 | __KERNEL_RCSID(0, "$NetBSD: nouveau_subdev_therm_nv50.c,v 1.1.1.1 2014/08/06 12:36:32 riastradh Exp $" ); |
30 | |
31 | #include "priv.h" |
32 | |
33 | struct nv50_therm_priv { |
34 | struct nouveau_therm_priv base; |
35 | }; |
36 | |
37 | static int |
38 | pwm_info(struct nouveau_therm *therm, int *line, int *ctrl, int *indx) |
39 | { |
40 | if (*line == 0x04) { |
41 | *ctrl = 0x00e100; |
42 | *line = 4; |
43 | *indx = 0; |
44 | } else |
45 | if (*line == 0x09) { |
46 | *ctrl = 0x00e100; |
47 | *line = 9; |
48 | *indx = 1; |
49 | } else |
50 | if (*line == 0x10) { |
51 | *ctrl = 0x00e28c; |
52 | *line = 0; |
53 | *indx = 0; |
54 | } else { |
55 | nv_error(therm, "unknown pwm ctrl for gpio %d\n" , *line); |
56 | return -ENODEV; |
57 | } |
58 | |
59 | return 0; |
60 | } |
61 | |
62 | int |
63 | nv50_fan_pwm_ctrl(struct nouveau_therm *therm, int line, bool enable) |
64 | { |
65 | u32 data = enable ? 0x00000001 : 0x00000000; |
66 | int ctrl, id, ret = pwm_info(therm, &line, &ctrl, &id); |
67 | if (ret == 0) |
68 | nv_mask(therm, ctrl, 0x00010001 << line, data << line); |
69 | return ret; |
70 | } |
71 | |
72 | int |
73 | nv50_fan_pwm_get(struct nouveau_therm *therm, int line, u32 *divs, u32 *duty) |
74 | { |
75 | int ctrl, id, ret = pwm_info(therm, &line, &ctrl, &id); |
76 | if (ret) |
77 | return ret; |
78 | |
79 | if (nv_rd32(therm, ctrl) & (1 << line)) { |
80 | *divs = nv_rd32(therm, 0x00e114 + (id * 8)); |
81 | *duty = nv_rd32(therm, 0x00e118 + (id * 8)); |
82 | return 0; |
83 | } |
84 | |
85 | return -EINVAL; |
86 | } |
87 | |
88 | int |
89 | nv50_fan_pwm_set(struct nouveau_therm *therm, int line, u32 divs, u32 duty) |
90 | { |
91 | int ctrl, id, ret = pwm_info(therm, &line, &ctrl, &id); |
92 | if (ret) |
93 | return ret; |
94 | |
95 | nv_wr32(therm, 0x00e114 + (id * 8), divs); |
96 | nv_wr32(therm, 0x00e118 + (id * 8), duty | 0x80000000); |
97 | return 0; |
98 | } |
99 | |
100 | int |
101 | nv50_fan_pwm_clock(struct nouveau_therm *therm, int line) |
102 | { |
103 | int chipset = nv_device(therm)->chipset; |
104 | int crystal = nv_device(therm)->crystal; |
105 | int pwm_clock; |
106 | |
107 | /* determine the PWM source clock */ |
108 | if (chipset > 0x50 && chipset < 0x94) { |
109 | u8 pwm_div = nv_rd32(therm, 0x410c); |
110 | if (nv_rd32(therm, 0xc040) & 0x800000) { |
111 | /* Use the HOST clock (100 MHz) |
112 | * Where does this constant(2.4) comes from? */ |
113 | pwm_clock = (100000000 >> pwm_div) * 10 / 24; |
114 | } else { |
115 | /* Where does this constant(20) comes from? */ |
116 | pwm_clock = (crystal * 1000) >> pwm_div; |
117 | pwm_clock /= 20; |
118 | } |
119 | } else { |
120 | pwm_clock = (crystal * 1000) / 20; |
121 | } |
122 | |
123 | return pwm_clock; |
124 | } |
125 | |
126 | static void |
127 | nv50_sensor_setup(struct nouveau_therm *therm) |
128 | { |
129 | nv_mask(therm, 0x20010, 0x40000000, 0x0); |
130 | mdelay(20); /* wait for the temperature to stabilize */ |
131 | } |
132 | |
133 | static int |
134 | nv50_temp_get(struct nouveau_therm *therm) |
135 | { |
136 | struct nouveau_therm_priv *priv = (void *)therm; |
137 | struct nvbios_therm_sensor *sensor = &priv->bios_sensor; |
138 | int core_temp; |
139 | |
140 | core_temp = nv_rd32(therm, 0x20014) & 0x3fff; |
141 | |
142 | /* if the slope or the offset is unset, do no use the sensor */ |
143 | if (!sensor->slope_div || !sensor->slope_mult || |
144 | !sensor->offset_num || !sensor->offset_den) |
145 | return -ENODEV; |
146 | |
147 | core_temp = core_temp * sensor->slope_mult / sensor->slope_div; |
148 | core_temp = core_temp + sensor->offset_num / sensor->offset_den; |
149 | core_temp = core_temp + sensor->offset_constant - 8; |
150 | |
151 | /* reserve negative temperatures for errors */ |
152 | if (core_temp < 0) |
153 | core_temp = 0; |
154 | |
155 | return core_temp; |
156 | } |
157 | |
158 | static int |
159 | nv50_therm_ctor(struct nouveau_object *parent, |
160 | struct nouveau_object *engine, |
161 | struct nouveau_oclass *oclass, void *data, u32 size, |
162 | struct nouveau_object **pobject) |
163 | { |
164 | struct nv50_therm_priv *priv; |
165 | int ret; |
166 | |
167 | ret = nouveau_therm_create(parent, engine, oclass, &priv); |
168 | *pobject = nv_object(priv); |
169 | if (ret) |
170 | return ret; |
171 | |
172 | priv->base.base.pwm_ctrl = nv50_fan_pwm_ctrl; |
173 | priv->base.base.pwm_get = nv50_fan_pwm_get; |
174 | priv->base.base.pwm_set = nv50_fan_pwm_set; |
175 | priv->base.base.pwm_clock = nv50_fan_pwm_clock; |
176 | priv->base.base.temp_get = nv50_temp_get; |
177 | priv->base.sensor.program_alarms = nouveau_therm_program_alarms_polling; |
178 | nv_subdev(priv)->intr = nv40_therm_intr; |
179 | |
180 | return nouveau_therm_preinit(&priv->base.base); |
181 | } |
182 | |
183 | static int |
184 | nv50_therm_init(struct nouveau_object *object) |
185 | { |
186 | struct nouveau_therm *therm = (void *)object; |
187 | |
188 | nv50_sensor_setup(therm); |
189 | |
190 | return _nouveau_therm_init(object); |
191 | } |
192 | |
193 | struct nouveau_oclass |
194 | nv50_therm_oclass = { |
195 | .handle = NV_SUBDEV(THERM, 0x50), |
196 | .ofuncs = &(struct nouveau_ofuncs) { |
197 | .ctor = nv50_therm_ctor, |
198 | .dtor = _nouveau_therm_dtor, |
199 | .init = nv50_therm_init, |
200 | .fini = _nouveau_therm_fini, |
201 | }, |
202 | }; |
203 | |