1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * ACPI INT3403 thermal driver
4 * Copyright (c) 2013, Intel Corporation.
5 */
6
7 #include <linux/kernel.h>
8 #include <linux/module.h>
9 #include <linux/init.h>
10 #include <linux/types.h>
11 #include <linux/acpi.h>
12 #include <linux/thermal.h>
13 #include <linux/platform_device.h>
14 #include "int340x_thermal_zone.h"
15
16 #define INT3403_TYPE_SENSOR 0x03
17 #define INT3403_TYPE_CHARGER 0x0B
18 #define INT3403_TYPE_BATTERY 0x0C
19 #define INT3403_PERF_CHANGED_EVENT 0x80
20 #define INT3403_PERF_TRIP_POINT_CHANGED 0x81
21 #define INT3403_THERMAL_EVENT 0x90
22
23 /* Preserved structure for future expandbility */
24 struct int3403_sensor {
25 struct int34x_thermal_zone *int340x_zone;
26 };
27
28 struct int3403_performance_state {
29 u64 performance;
30 u64 power;
31 u64 latency;
32 u64 linear;
33 u64 control;
34 u64 raw_performace;
35 char *raw_unit;
36 int reserved;
37 };
38
39 struct int3403_cdev {
40 struct thermal_cooling_device *cdev;
41 unsigned long max_state;
42 };
43
44 struct int3403_priv {
45 struct platform_device *pdev;
46 struct acpi_device *adev;
47 unsigned long long type;
48 void *priv;
49 };
50
int3403_notify(acpi_handle handle,u32 event,void * data)51 static void int3403_notify(acpi_handle handle,
52 u32 event, void *data)
53 {
54 struct int3403_priv *priv = data;
55 struct int3403_sensor *obj;
56
57 if (!priv)
58 return;
59
60 obj = priv->priv;
61 if (priv->type != INT3403_TYPE_SENSOR || !obj)
62 return;
63
64 switch (event) {
65 case INT3403_PERF_CHANGED_EVENT:
66 break;
67 case INT3403_THERMAL_EVENT:
68 int340x_thermal_zone_device_update(obj->int340x_zone,
69 THERMAL_TRIP_VIOLATED);
70 break;
71 case INT3403_PERF_TRIP_POINT_CHANGED:
72 int340x_thermal_read_trips(obj->int340x_zone);
73 int340x_thermal_zone_device_update(obj->int340x_zone,
74 THERMAL_TRIP_CHANGED);
75 break;
76 default:
77 dev_err(&priv->pdev->dev, "Unsupported event [0x%x]\n", event);
78 break;
79 }
80 }
81
int3403_sensor_add(struct int3403_priv * priv)82 static int int3403_sensor_add(struct int3403_priv *priv)
83 {
84 int result = 0;
85 struct int3403_sensor *obj;
86
87 obj = devm_kzalloc(&priv->pdev->dev, sizeof(*obj), GFP_KERNEL);
88 if (!obj)
89 return -ENOMEM;
90
91 priv->priv = obj;
92
93 obj->int340x_zone = int340x_thermal_zone_add(priv->adev, NULL);
94 if (IS_ERR(obj->int340x_zone))
95 return PTR_ERR(obj->int340x_zone);
96
97 result = acpi_install_notify_handler(priv->adev->handle,
98 ACPI_DEVICE_NOTIFY, int3403_notify,
99 (void *)priv);
100 if (result)
101 goto err_free_obj;
102
103 return 0;
104
105 err_free_obj:
106 int340x_thermal_zone_remove(obj->int340x_zone);
107 return result;
108 }
109
int3403_sensor_remove(struct int3403_priv * priv)110 static int int3403_sensor_remove(struct int3403_priv *priv)
111 {
112 struct int3403_sensor *obj = priv->priv;
113
114 acpi_remove_notify_handler(priv->adev->handle,
115 ACPI_DEVICE_NOTIFY, int3403_notify);
116 int340x_thermal_zone_remove(obj->int340x_zone);
117
118 return 0;
119 }
120
121 /* INT3403 Cooling devices */
int3403_get_max_state(struct thermal_cooling_device * cdev,unsigned long * state)122 static int int3403_get_max_state(struct thermal_cooling_device *cdev,
123 unsigned long *state)
124 {
125 struct int3403_priv *priv = cdev->devdata;
126 struct int3403_cdev *obj = priv->priv;
127
128 *state = obj->max_state;
129 return 0;
130 }
131
int3403_get_cur_state(struct thermal_cooling_device * cdev,unsigned long * state)132 static int int3403_get_cur_state(struct thermal_cooling_device *cdev,
133 unsigned long *state)
134 {
135 struct int3403_priv *priv = cdev->devdata;
136 unsigned long long level;
137 acpi_status status;
138
139 status = acpi_evaluate_integer(priv->adev->handle, "PPPC", NULL, &level);
140 if (ACPI_SUCCESS(status)) {
141 *state = level;
142 return 0;
143 } else
144 return -EINVAL;
145 }
146
147 static int
int3403_set_cur_state(struct thermal_cooling_device * cdev,unsigned long state)148 int3403_set_cur_state(struct thermal_cooling_device *cdev, unsigned long state)
149 {
150 struct int3403_priv *priv = cdev->devdata;
151 acpi_status status;
152
153 status = acpi_execute_simple_method(priv->adev->handle, "SPPC", state);
154 if (ACPI_SUCCESS(status))
155 return 0;
156 else
157 return -EINVAL;
158 }
159
160 static const struct thermal_cooling_device_ops int3403_cooling_ops = {
161 .get_max_state = int3403_get_max_state,
162 .get_cur_state = int3403_get_cur_state,
163 .set_cur_state = int3403_set_cur_state,
164 };
165
int3403_cdev_add(struct int3403_priv * priv)166 static int int3403_cdev_add(struct int3403_priv *priv)
167 {
168 int result = 0;
169 acpi_status status;
170 struct int3403_cdev *obj;
171 struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER, NULL };
172 union acpi_object *p;
173
174 obj = devm_kzalloc(&priv->pdev->dev, sizeof(*obj), GFP_KERNEL);
175 if (!obj)
176 return -ENOMEM;
177
178 status = acpi_evaluate_object(priv->adev->handle, "PPSS", NULL, &buf);
179 if (ACPI_FAILURE(status))
180 return -ENODEV;
181
182 p = buf.pointer;
183 if (!p || (p->type != ACPI_TYPE_PACKAGE)) {
184 pr_warn("Invalid PPSS data\n");
185 kfree(buf.pointer);
186 return -EFAULT;
187 }
188
189 priv->priv = obj;
190 obj->max_state = p->package.count - 1;
191 obj->cdev =
192 thermal_cooling_device_register(acpi_device_bid(priv->adev),
193 priv, &int3403_cooling_ops);
194 if (IS_ERR(obj->cdev))
195 result = PTR_ERR(obj->cdev);
196
197 kfree(buf.pointer);
198 /* TODO: add ACPI notification support */
199
200 return result;
201 }
202
int3403_cdev_remove(struct int3403_priv * priv)203 static int int3403_cdev_remove(struct int3403_priv *priv)
204 {
205 struct int3403_cdev *obj = priv->priv;
206
207 thermal_cooling_device_unregister(obj->cdev);
208 return 0;
209 }
210
int3403_add(struct platform_device * pdev)211 static int int3403_add(struct platform_device *pdev)
212 {
213 struct int3403_priv *priv;
214 int result = 0;
215 unsigned long long tmp;
216 acpi_status status;
217
218 priv = devm_kzalloc(&pdev->dev, sizeof(struct int3403_priv),
219 GFP_KERNEL);
220 if (!priv)
221 return -ENOMEM;
222
223 priv->pdev = pdev;
224 priv->adev = ACPI_COMPANION(&(pdev->dev));
225 if (!priv->adev) {
226 result = -EINVAL;
227 goto err;
228 }
229
230
231 status = acpi_evaluate_integer(priv->adev->handle, "_TMP",
232 NULL, &tmp);
233 if (ACPI_FAILURE(status)) {
234 status = acpi_evaluate_integer(priv->adev->handle, "PTYP",
235 NULL, &priv->type);
236 if (ACPI_FAILURE(status)) {
237 result = -EINVAL;
238 goto err;
239 }
240 } else {
241 priv->type = INT3403_TYPE_SENSOR;
242 }
243
244 platform_set_drvdata(pdev, priv);
245 switch (priv->type) {
246 case INT3403_TYPE_SENSOR:
247 result = int3403_sensor_add(priv);
248 break;
249 case INT3403_TYPE_CHARGER:
250 case INT3403_TYPE_BATTERY:
251 result = int3403_cdev_add(priv);
252 break;
253 default:
254 result = -EINVAL;
255 }
256
257 if (result)
258 goto err;
259 return result;
260
261 err:
262 return result;
263 }
264
int3403_remove(struct platform_device * pdev)265 static int int3403_remove(struct platform_device *pdev)
266 {
267 struct int3403_priv *priv = platform_get_drvdata(pdev);
268
269 switch (priv->type) {
270 case INT3403_TYPE_SENSOR:
271 int3403_sensor_remove(priv);
272 break;
273 case INT3403_TYPE_CHARGER:
274 case INT3403_TYPE_BATTERY:
275 int3403_cdev_remove(priv);
276 break;
277 default:
278 break;
279 }
280
281 return 0;
282 }
283
284 static const struct acpi_device_id int3403_device_ids[] = {
285 {"INT3403", 0},
286 {"", 0},
287 };
288 MODULE_DEVICE_TABLE(acpi, int3403_device_ids);
289
290 static struct platform_driver int3403_driver = {
291 .probe = int3403_add,
292 .remove = int3403_remove,
293 .driver = {
294 .name = "int3403 thermal",
295 .acpi_match_table = int3403_device_ids,
296 },
297 };
298
299 module_platform_driver(int3403_driver);
300
301 MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
302 MODULE_LICENSE("GPL v2");
303 MODULE_DESCRIPTION("ACPI INT3403 thermal driver");
304
