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17#include <linux/device.h>
18#include <linux/sysfs.h>
19#include <linux/thermal.h>
20#include <linux/hwmon.h>
21#include <linux/hwmon-sysfs.h>
22#include "core.h"
23#include "debug.h"
24#include "wmi-ops.h"
25
26static int
27ath10k_thermal_get_max_throttle_state(struct thermal_cooling_device *cdev,
28 unsigned long *state)
29{
30 *state = ATH10K_THERMAL_THROTTLE_MAX;
31
32 return 0;
33}
34
35static int
36ath10k_thermal_get_cur_throttle_state(struct thermal_cooling_device *cdev,
37 unsigned long *state)
38{
39 struct ath10k *ar = cdev->devdata;
40
41 mutex_lock(&ar->conf_mutex);
42 *state = ar->thermal.throttle_state;
43 mutex_unlock(&ar->conf_mutex);
44
45 return 0;
46}
47
48static int
49ath10k_thermal_set_cur_throttle_state(struct thermal_cooling_device *cdev,
50 unsigned long throttle_state)
51{
52 struct ath10k *ar = cdev->devdata;
53
54 if (throttle_state > ATH10K_THERMAL_THROTTLE_MAX) {
55 ath10k_warn(ar, "throttle state %ld is exceeding the limit %d\n",
56 throttle_state, ATH10K_THERMAL_THROTTLE_MAX);
57 return -EINVAL;
58 }
59 mutex_lock(&ar->conf_mutex);
60 ar->thermal.throttle_state = throttle_state;
61 ath10k_thermal_set_throttling(ar);
62 mutex_unlock(&ar->conf_mutex);
63 return 0;
64}
65
66static struct thermal_cooling_device_ops ath10k_thermal_ops = {
67 .get_max_state = ath10k_thermal_get_max_throttle_state,
68 .get_cur_state = ath10k_thermal_get_cur_throttle_state,
69 .set_cur_state = ath10k_thermal_set_cur_throttle_state,
70};
71
72static ssize_t ath10k_thermal_show_temp(struct device *dev,
73 struct device_attribute *attr,
74 char *buf)
75{
76 struct ath10k *ar = dev_get_drvdata(dev);
77 int ret, temperature;
78 unsigned long time_left;
79
80 mutex_lock(&ar->conf_mutex);
81
82
83 if (ar->state != ATH10K_STATE_ON) {
84 ret = -ENETDOWN;
85 goto out;
86 }
87
88 reinit_completion(&ar->thermal.wmi_sync);
89 ret = ath10k_wmi_pdev_get_temperature(ar);
90 if (ret) {
91 ath10k_warn(ar, "failed to read temperature %d\n", ret);
92 goto out;
93 }
94
95 if (test_bit(ATH10K_FLAG_CRASH_FLUSH, &ar->dev_flags)) {
96 ret = -ESHUTDOWN;
97 goto out;
98 }
99
100 time_left = wait_for_completion_timeout(&ar->thermal.wmi_sync,
101 ATH10K_THERMAL_SYNC_TIMEOUT_HZ);
102 if (!time_left) {
103 ath10k_warn(ar, "failed to synchronize thermal read\n");
104 ret = -ETIMEDOUT;
105 goto out;
106 }
107
108 spin_lock_bh(&ar->data_lock);
109 temperature = ar->thermal.temperature;
110 spin_unlock_bh(&ar->data_lock);
111
112
113 ret = snprintf(buf, PAGE_SIZE, "%d\n", temperature * 1000);
114out:
115 mutex_unlock(&ar->conf_mutex);
116 return ret;
117}
118
119void ath10k_thermal_event_temperature(struct ath10k *ar, int temperature)
120{
121 spin_lock_bh(&ar->data_lock);
122 ar->thermal.temperature = temperature;
123 spin_unlock_bh(&ar->data_lock);
124 complete(&ar->thermal.wmi_sync);
125}
126
127static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, ath10k_thermal_show_temp,
128 NULL, 0);
129
130static struct attribute *ath10k_hwmon_attrs[] = {
131 &sensor_dev_attr_temp1_input.dev_attr.attr,
132 NULL,
133};
134ATTRIBUTE_GROUPS(ath10k_hwmon);
135
136void ath10k_thermal_set_throttling(struct ath10k *ar)
137{
138 u32 period, duration, enabled;
139 int ret;
140
141 lockdep_assert_held(&ar->conf_mutex);
142
143 if (!ar->wmi.ops->gen_pdev_set_quiet_mode)
144 return;
145
146 if (ar->state != ATH10K_STATE_ON)
147 return;
148
149 period = ar->thermal.quiet_period;
150 duration = (period * ar->thermal.throttle_state) / 100;
151 enabled = duration ? 1 : 0;
152
153 ret = ath10k_wmi_pdev_set_quiet_mode(ar, period, duration,
154 ATH10K_QUIET_START_OFFSET,
155 enabled);
156 if (ret) {
157 ath10k_warn(ar, "failed to set quiet mode period %u duarion %u enabled %u ret %d\n",
158 period, duration, enabled, ret);
159 }
160}
161
162int ath10k_thermal_register(struct ath10k *ar)
163{
164 struct thermal_cooling_device *cdev;
165 struct device *hwmon_dev;
166 int ret;
167
168 cdev = thermal_cooling_device_register("ath10k_thermal", ar,
169 &ath10k_thermal_ops);
170
171 if (IS_ERR(cdev)) {
172 ath10k_err(ar, "failed to setup thermal device result: %ld\n",
173 PTR_ERR(cdev));
174 return -EINVAL;
175 }
176
177 ret = sysfs_create_link(&ar->dev->kobj, &cdev->device.kobj,
178 "cooling_device");
179 if (ret) {
180 ath10k_err(ar, "failed to create cooling device symlink\n");
181 goto err_cooling_destroy;
182 }
183
184 ar->thermal.cdev = cdev;
185 ar->thermal.quiet_period = ATH10K_QUIET_PERIOD_DEFAULT;
186
187
188
189
190 if (!(ar->wmi.ops->gen_pdev_get_temperature))
191 return 0;
192
193
194
195 if (!IS_REACHABLE(CONFIG_HWMON))
196 return 0;
197
198 hwmon_dev = devm_hwmon_device_register_with_groups(ar->dev,
199 "ath10k_hwmon", ar,
200 ath10k_hwmon_groups);
201 if (IS_ERR(hwmon_dev)) {
202 ath10k_err(ar, "failed to register hwmon device: %ld\n",
203 PTR_ERR(hwmon_dev));
204 ret = -EINVAL;
205 goto err_remove_link;
206 }
207 return 0;
208
209err_remove_link:
210 sysfs_remove_link(&ar->dev->kobj, "cooling_device");
211err_cooling_destroy:
212 thermal_cooling_device_unregister(cdev);
213 return ret;
214}
215
216void ath10k_thermal_unregister(struct ath10k *ar)
217{
218 sysfs_remove_link(&ar->dev->kobj, "cooling_device");
219 thermal_cooling_device_unregister(ar->thermal.cdev);
220}
221
