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
pwm_info(struct nvkm_therm * therm,int line)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 		break;
45 	default:
46 		break;
47 	}
48 
49 	nvkm_error(subdev, "GPIO %d unknown PWM: %08x\n", line, gpio);
50 	return -ENODEV;
51 }
52 
53 int
gf119_fan_pwm_ctrl(struct nvkm_therm * therm,int line,bool enable)54 gf119_fan_pwm_ctrl(struct nvkm_therm *therm, int line, bool enable)
55 {
56 	struct nvkm_device *device = therm->subdev.device;
57 	u32 data = enable ? 0x00000040 : 0x00000000;
58 	int indx = pwm_info(therm, line);
59 	if (indx < 0)
60 		return indx;
61 	else if (indx < 2)
62 		nvkm_mask(device, 0x00d610 + (line * 0x04), 0x000000c0, data);
63 	/* nothing to do for indx == 2, it seems hardwired to PTHERM */
64 	return 0;
65 }
66 
67 int
gf119_fan_pwm_get(struct nvkm_therm * therm,int line,u32 * divs,u32 * duty)68 gf119_fan_pwm_get(struct nvkm_therm *therm, int line, u32 *divs, u32 *duty)
69 {
70 	struct nvkm_device *device = therm->subdev.device;
71 	int indx = pwm_info(therm, line);
72 	if (indx < 0)
73 		return indx;
74 	else if (indx < 2) {
75 		if (nvkm_rd32(device, 0x00d610 + (line * 0x04)) & 0x00000040) {
76 			*divs = nvkm_rd32(device, 0x00e114 + (indx * 8));
77 			*duty = nvkm_rd32(device, 0x00e118 + (indx * 8));
78 			return 0;
79 		}
80 	} else if (indx == 2) {
81 		*divs = nvkm_rd32(device, 0x0200d8) & 0x1fff;
82 		*duty = nvkm_rd32(device, 0x0200dc) & 0x1fff;
83 		return 0;
84 	}
85 
86 	return -EINVAL;
87 }
88 
89 int
gf119_fan_pwm_set(struct nvkm_therm * therm,int line,u32 divs,u32 duty)90 gf119_fan_pwm_set(struct nvkm_therm *therm, int line, u32 divs, u32 duty)
91 {
92 	struct nvkm_device *device = therm->subdev.device;
93 	int indx = pwm_info(therm, line);
94 	if (indx < 0)
95 		return indx;
96 	else if (indx < 2) {
97 		nvkm_wr32(device, 0x00e114 + (indx * 8), divs);
98 		nvkm_wr32(device, 0x00e118 + (indx * 8), duty | 0x80000000);
99 	} else if (indx == 2) {
100 		nvkm_mask(device, 0x0200d8, 0x1fff, divs); /* keep the high bits */
101 		nvkm_wr32(device, 0x0200dc, duty | 0x40000000);
102 	}
103 	return 0;
104 }
105 
106 int
gf119_fan_pwm_clock(struct nvkm_therm * therm,int line)107 gf119_fan_pwm_clock(struct nvkm_therm *therm, int line)
108 {
109 	struct nvkm_device *device = therm->subdev.device;
110 	int indx = pwm_info(therm, line);
111 	if (indx < 0)
112 		return 0;
113 	else if (indx < 2)
114 		return (device->crystal * 1000) / 20;
115 	else
116 		return device->crystal * 1000 / 10;
117 }
118 
119 void
gf119_therm_init(struct nvkm_therm * therm)120 gf119_therm_init(struct nvkm_therm *therm)
121 {
122 	struct nvkm_device *device = therm->subdev.device;
123 
124 	g84_sensor_setup(therm);
125 
126 	/* enable fan tach, count revolutions per-second */
127 	nvkm_mask(device, 0x00e720, 0x00000003, 0x00000002);
128 	if (therm->fan->tach.func != DCB_GPIO_UNUSED) {
129 		nvkm_mask(device, 0x00d79c, 0x000000ff, therm->fan->tach.line);
130 		nvkm_wr32(device, 0x00e724, device->crystal * 1000);
131 		nvkm_mask(device, 0x00e720, 0x00000001, 0x00000001);
132 	}
133 	nvkm_mask(device, 0x00e720, 0x00000002, 0x00000000);
134 }
135 
136 static const struct nvkm_therm_func
137 gf119_therm = {
138 	.init = gf119_therm_init,
139 	.fini = g84_therm_fini,
140 	.pwm_ctrl = gf119_fan_pwm_ctrl,
141 	.pwm_get = gf119_fan_pwm_get,
142 	.pwm_set = gf119_fan_pwm_set,
143 	.pwm_clock = gf119_fan_pwm_clock,
144 	.temp_get = g84_temp_get,
145 	.fan_sense = gt215_therm_fan_sense,
146 	.program_alarms = nvkm_therm_program_alarms_polling,
147 };
148 
149 int
gf119_therm_new(struct nvkm_device * device,enum nvkm_subdev_type type,int inst,struct nvkm_therm ** ptherm)150 gf119_therm_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst,
151 		struct nvkm_therm **ptherm)
152 {
153 	return nvkm_therm_new_(&gf119_therm, device, type, inst, ptherm);
154 }
155