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 * 	    Martin Peres
24 */
25#include "priv.h"
26
27enum nv40_sensor_style { INVALID_STYLE = -1, OLD_STYLE = 0, NEW_STYLE = 1 };
28
29static enum nv40_sensor_style
30nv40_sensor_style(struct nvkm_therm *therm)
31{
32	switch (therm->subdev.device->chipset) {
33	case 0x43:
34	case 0x44:
35	case 0x4a:
36	case 0x47:
37		return OLD_STYLE;
38	case 0x46:
39	case 0x49:
40	case 0x4b:
41	case 0x4e:
42	case 0x4c:
43	case 0x67:
44	case 0x68:
45	case 0x63:
46		return NEW_STYLE;
47	default:
48		return INVALID_STYLE;
49	}
50}
51
52static int
53nv40_sensor_setup(struct nvkm_therm *therm)
54{
55	struct nvkm_device *device = therm->subdev.device;
56	enum nv40_sensor_style style = nv40_sensor_style(therm);
57
58	/* enable ADC readout and disable the ALARM threshold */
59	if (style == NEW_STYLE) {
60		nvkm_mask(device, 0x15b8, 0x80000000, 0);
61		nvkm_wr32(device, 0x15b0, 0x80003fff);
62		mdelay(20); /* wait for the temperature to stabilize */
63		return nvkm_rd32(device, 0x15b4) & 0x3fff;
64	} else if (style == OLD_STYLE) {
65		nvkm_wr32(device, 0x15b0, 0xff);
66		mdelay(20); /* wait for the temperature to stabilize */
67		return nvkm_rd32(device, 0x15b4) & 0xff;
68	} else
69		return -ENODEV;
70}
71
72static int
73nv40_temp_get(struct nvkm_therm *therm)
74{
75	struct nvkm_device *device = therm->subdev.device;
76	struct nvbios_therm_sensor *sensor = &therm->bios_sensor;
77	enum nv40_sensor_style style = nv40_sensor_style(therm);
78	int core_temp;
79
80	if (style == NEW_STYLE) {
81		nvkm_wr32(device, 0x15b0, 0x80003fff);
82		core_temp = nvkm_rd32(device, 0x15b4) & 0x3fff;
83	} else if (style == OLD_STYLE) {
84		nvkm_wr32(device, 0x15b0, 0xff);
85		core_temp = nvkm_rd32(device, 0x15b4) & 0xff;
86	} else
87		return -ENODEV;
88
89	/* if the slope or the offset is unset, do no use the sensor */
90	if (!sensor->slope_div || !sensor->slope_mult ||
91	    !sensor->offset_num || !sensor->offset_den)
92	    return -ENODEV;
93
94	core_temp = core_temp * sensor->slope_mult / sensor->slope_div;
95	core_temp = core_temp + sensor->offset_num / sensor->offset_den;
96	core_temp = core_temp + sensor->offset_constant - 8;
97
98	/* reserve negative temperatures for errors */
99	if (core_temp < 0)
100		core_temp = 0;
101
102	return core_temp;
103}
104
105static int
106nv40_fan_pwm_ctrl(struct nvkm_therm *therm, int line, bool enable)
107{
108	struct nvkm_subdev *subdev = &therm->subdev;
109	struct nvkm_device *device = subdev->device;
110	u32 mask = enable ? 0x80000000 : 0x00000000;
111	if      (line == 2) nvkm_mask(device, 0x0010f0, 0x80000000, mask);
112	else if (line == 9) nvkm_mask(device, 0x0015f4, 0x80000000, mask);
113	else {
114		nvkm_error(subdev, "unknown pwm ctrl for gpio %d\n", line);
115		return -ENODEV;
116	}
117	return 0;
118}
119
120static int
121nv40_fan_pwm_get(struct nvkm_therm *therm, int line, u32 *divs, u32 *duty)
122{
123	struct nvkm_subdev *subdev = &therm->subdev;
124	struct nvkm_device *device = subdev->device;
125	if (line == 2) {
126		u32 reg = nvkm_rd32(device, 0x0010f0);
127		if (reg & 0x80000000) {
128			*duty = (reg & 0x7fff0000) >> 16;
129			*divs = (reg & 0x00007fff);
130			return 0;
131		}
132	} else
133	if (line == 9) {
134		u32 reg = nvkm_rd32(device, 0x0015f4);
135		if (reg & 0x80000000) {
136			*divs = nvkm_rd32(device, 0x0015f8);
137			*duty = (reg & 0x7fffffff);
138			return 0;
139		}
140	} else {
141		nvkm_error(subdev, "unknown pwm ctrl for gpio %d\n", line);
142		return -ENODEV;
143	}
144
145	return -EINVAL;
146}
147
148static int
149nv40_fan_pwm_set(struct nvkm_therm *therm, int line, u32 divs, u32 duty)
150{
151	struct nvkm_subdev *subdev = &therm->subdev;
152	struct nvkm_device *device = subdev->device;
153	if (line == 2) {
154		nvkm_mask(device, 0x0010f0, 0x7fff7fff, (duty << 16) | divs);
155	} else
156	if (line == 9) {
157		nvkm_wr32(device, 0x0015f8, divs);
158		nvkm_mask(device, 0x0015f4, 0x7fffffff, duty);
159	} else {
160		nvkm_error(subdev, "unknown pwm ctrl for gpio %d\n", line);
161		return -ENODEV;
162	}
163
164	return 0;
165}
166
167void
168nv40_therm_intr(struct nvkm_therm *therm)
169{
170	struct nvkm_subdev *subdev = &therm->subdev;
171	struct nvkm_device *device = subdev->device;
172	uint32_t stat = nvkm_rd32(device, 0x1100);
173
174	/* traitement */
175
176	/* ack all IRQs */
177	nvkm_wr32(device, 0x1100, 0x70000);
178
179	nvkm_error(subdev, "THERM received an IRQ: stat = %x\n", stat);
180}
181
182static void
183nv40_therm_init(struct nvkm_therm *therm)
184{
185	nv40_sensor_setup(therm);
186}
187
188static const struct nvkm_therm_func
189nv40_therm = {
190	.init = nv40_therm_init,
191	.intr = nv40_therm_intr,
192	.pwm_ctrl = nv40_fan_pwm_ctrl,
193	.pwm_get = nv40_fan_pwm_get,
194	.pwm_set = nv40_fan_pwm_set,
195	.temp_get = nv40_temp_get,
196	.program_alarms = nvkm_therm_program_alarms_polling,
197};
198
199int
200nv40_therm_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst,
201	       struct nvkm_therm **ptherm)
202{
203	return nvkm_therm_new_(&nv40_therm, device, type, inst, ptherm);
204}
205