1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
|
// SPDX-License-Identifier: GPL-2.0+
/*
* Surface Platform Profile / Performance Mode driver for Surface System
* Aggregator Module (thermal and fan subsystem).
*
* Copyright (C) 2021-2022 Maximilian Luz <luzmaximilian@gmail.com>
*/
#include <asm/unaligned.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/platform_profile.h>
#include <linux/types.h>
#include <linux/surface_aggregator/device.h>
// Enum for the platform performance profile sent to the TMP module.
enum ssam_tmp_profile {
SSAM_TMP_PROFILE_NORMAL = 1,
SSAM_TMP_PROFILE_BATTERY_SAVER = 2,
SSAM_TMP_PROFILE_BETTER_PERFORMANCE = 3,
SSAM_TMP_PROFILE_BEST_PERFORMANCE = 4,
};
// Enum for the fan profile sent to the FAN module. This fan profile is
// only sent to the EC if the 'has_fan' property is set. The integers are
// not a typo, they differ from the performance profile indices.
enum ssam_fan_profile {
SSAM_FAN_PROFILE_NORMAL = 2,
SSAM_FAN_PROFILE_BATTERY_SAVER = 1,
SSAM_FAN_PROFILE_BETTER_PERFORMANCE = 3,
SSAM_FAN_PROFILE_BEST_PERFORMANCE = 4,
};
struct ssam_tmp_profile_info {
__le32 profile;
__le16 unknown1;
__le16 unknown2;
} __packed;
struct ssam_platform_profile_device {
struct ssam_device *sdev;
struct platform_profile_handler handler;
bool has_fan;
};
SSAM_DEFINE_SYNC_REQUEST_CL_R(__ssam_tmp_profile_get, struct ssam_tmp_profile_info, {
.target_category = SSAM_SSH_TC_TMP,
.command_id = 0x02,
});
SSAM_DEFINE_SYNC_REQUEST_CL_W(__ssam_tmp_profile_set, __le32, {
.target_category = SSAM_SSH_TC_TMP,
.command_id = 0x03,
});
SSAM_DEFINE_SYNC_REQUEST_W(__ssam_fan_profile_set, u8, {
.target_category = SSAM_SSH_TC_FAN,
.target_id = SSAM_SSH_TID_SAM,
.command_id = 0x0e,
.instance_id = 0x01,
});
static int ssam_tmp_profile_get(struct ssam_device *sdev, enum ssam_tmp_profile *p)
{
struct ssam_tmp_profile_info info;
int status;
status = ssam_retry(__ssam_tmp_profile_get, sdev, &info);
if (status < 0)
return status;
*p = le32_to_cpu(info.profile);
return 0;
}
static int ssam_tmp_profile_set(struct ssam_device *sdev, enum ssam_tmp_profile p)
{
const __le32 profile_le = cpu_to_le32(p);
return ssam_retry(__ssam_tmp_profile_set, sdev, &profile_le);
}
static int ssam_fan_profile_set(struct ssam_device *sdev, enum ssam_fan_profile p)
{
const u8 profile = p;
return ssam_retry(__ssam_fan_profile_set, sdev->ctrl, &profile);
}
static int convert_ssam_tmp_to_profile(struct ssam_device *sdev, enum ssam_tmp_profile p)
{
switch (p) {
case SSAM_TMP_PROFILE_NORMAL:
return PLATFORM_PROFILE_BALANCED;
case SSAM_TMP_PROFILE_BATTERY_SAVER:
return PLATFORM_PROFILE_LOW_POWER;
case SSAM_TMP_PROFILE_BETTER_PERFORMANCE:
return PLATFORM_PROFILE_BALANCED_PERFORMANCE;
case SSAM_TMP_PROFILE_BEST_PERFORMANCE:
return PLATFORM_PROFILE_PERFORMANCE;
default:
dev_err(&sdev->dev, "invalid performance profile: %d", p);
return -EINVAL;
}
}
static int convert_profile_to_ssam_tmp(struct ssam_device *sdev, enum platform_profile_option p)
{
switch (p) {
case PLATFORM_PROFILE_LOW_POWER:
return SSAM_TMP_PROFILE_BATTERY_SAVER;
case PLATFORM_PROFILE_BALANCED:
return SSAM_TMP_PROFILE_NORMAL;
case PLATFORM_PROFILE_BALANCED_PERFORMANCE:
return SSAM_TMP_PROFILE_BETTER_PERFORMANCE;
case PLATFORM_PROFILE_PERFORMANCE:
return SSAM_TMP_PROFILE_BEST_PERFORMANCE;
default:
/* This should have already been caught by platform_profile_store(). */
WARN(true, "unsupported platform profile");
return -EOPNOTSUPP;
}
}
static int convert_profile_to_ssam_fan(struct ssam_device *sdev, enum platform_profile_option p)
{
switch (p) {
case PLATFORM_PROFILE_LOW_POWER:
return SSAM_FAN_PROFILE_BATTERY_SAVER;
case PLATFORM_PROFILE_BALANCED:
return SSAM_FAN_PROFILE_NORMAL;
case PLATFORM_PROFILE_BALANCED_PERFORMANCE:
return SSAM_FAN_PROFILE_BETTER_PERFORMANCE;
case PLATFORM_PROFILE_PERFORMANCE:
return SSAM_FAN_PROFILE_BEST_PERFORMANCE;
default:
/* This should have already been caught by platform_profile_store(). */
WARN(true, "unsupported platform profile");
return -EOPNOTSUPP;
}
}
static int ssam_platform_profile_get(struct platform_profile_handler *pprof,
enum platform_profile_option *profile)
{
struct ssam_platform_profile_device *tpd;
enum ssam_tmp_profile tp;
int status;
tpd = container_of(pprof, struct ssam_platform_profile_device, handler);
status = ssam_tmp_profile_get(tpd->sdev, &tp);
if (status)
return status;
status = convert_ssam_tmp_to_profile(tpd->sdev, tp);
if (status < 0)
return status;
*profile = status;
return 0;
}
static int ssam_platform_profile_set(struct platform_profile_handler *pprof,
enum platform_profile_option profile)
{
struct ssam_platform_profile_device *tpd;
int tp;
tpd = container_of(pprof, struct ssam_platform_profile_device, handler);
tp = convert_profile_to_ssam_tmp(tpd->sdev, profile);
if (tp < 0)
return tp;
tp = ssam_tmp_profile_set(tpd->sdev, tp);
if (tp < 0)
return tp;
if (tpd->has_fan) {
tp = convert_profile_to_ssam_fan(tpd->sdev, profile);
if (tp < 0)
return tp;
tp = ssam_fan_profile_set(tpd->sdev, tp);
}
return tp;
}
static int surface_platform_profile_probe(struct ssam_device *sdev)
{
struct ssam_platform_profile_device *tpd;
tpd = devm_kzalloc(&sdev->dev, sizeof(*tpd), GFP_KERNEL);
if (!tpd)
return -ENOMEM;
tpd->sdev = sdev;
tpd->handler.profile_get = ssam_platform_profile_get;
tpd->handler.profile_set = ssam_platform_profile_set;
tpd->has_fan = device_property_read_bool(&sdev->dev, "has_fan");
set_bit(PLATFORM_PROFILE_LOW_POWER, tpd->handler.choices);
set_bit(PLATFORM_PROFILE_BALANCED, tpd->handler.choices);
set_bit(PLATFORM_PROFILE_BALANCED_PERFORMANCE, tpd->handler.choices);
set_bit(PLATFORM_PROFILE_PERFORMANCE, tpd->handler.choices);
return platform_profile_register(&tpd->handler);
}
static void surface_platform_profile_remove(struct ssam_device *sdev)
{
platform_profile_remove();
}
static const struct ssam_device_id ssam_platform_profile_match[] = {
{ SSAM_SDEV(TMP, SAM, 0x00, 0x01) },
{ },
};
MODULE_DEVICE_TABLE(ssam, ssam_platform_profile_match);
static struct ssam_device_driver surface_platform_profile = {
.probe = surface_platform_profile_probe,
.remove = surface_platform_profile_remove,
.match_table = ssam_platform_profile_match,
.driver = {
.name = "surface_platform_profile",
.probe_type = PROBE_PREFER_ASYNCHRONOUS,
},
};
module_ssam_device_driver(surface_platform_profile);
MODULE_AUTHOR("Maximilian Luz <luzmaximilian@gmail.com>");
MODULE_DESCRIPTION("Platform Profile Support for Surface System Aggregator Module");
MODULE_LICENSE("GPL");
|
