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2025cf9e | 1 | // SPDX-License-Identifier: GPL-2.0-only |
4384b8fe LT |
2 | /* |
3 | * ACPI INT3403 thermal driver | |
4 | * Copyright (c) 2013, Intel Corporation. | |
4384b8fe LT |
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> | |
593df404 | 14 | #include "int340x_thermal_zone.h" |
4384b8fe LT |
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 | |
43720df9 | 20 | #define INT3403_PERF_TRIP_POINT_CHANGED 0x81 |
4384b8fe LT |
21 | #define INT3403_THERMAL_EVENT 0x90 |
22 | ||
593df404 | 23 | /* Preserved structure for future expandbility */ |
4384b8fe | 24 | struct int3403_sensor { |
593df404 | 25 | struct int34x_thermal_zone *int340x_zone; |
4384b8fe LT |
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 | ||
4384b8fe LT |
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: | |
9176ae86 SP |
68 | int340x_thermal_zone_device_update(obj->int340x_zone, |
69 | THERMAL_TRIP_VIOLATED); | |
4384b8fe | 70 | break; |
43720df9 SP |
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; | |
4384b8fe LT |
76 | default: |
77 | dev_err(&priv->pdev->dev, "Unsupported event [0x%x]\n", event); | |
78 | break; | |
79 | } | |
80 | } | |
81 | ||
4384b8fe LT |
82 | static int int3403_sensor_add(struct int3403_priv *priv) |
83 | { | |
84 | int result = 0; | |
4384b8fe | 85 | struct int3403_sensor *obj; |
4384b8fe LT |
86 | |
87 | obj = devm_kzalloc(&priv->pdev->dev, sizeof(*obj), GFP_KERNEL); | |
88 | if (!obj) | |
89 | return -ENOMEM; | |
90 | ||
91 | priv->priv = obj; | |
92 | ||
593df404 SP |
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); | |
4384b8fe LT |
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: | |
593df404 | 106 | int340x_thermal_zone_remove(obj->int340x_zone); |
4384b8fe LT |
107 | return result; |
108 | } | |
109 | ||
110 | static int int3403_sensor_remove(struct int3403_priv *priv) | |
111 | { | |
112 | struct int3403_sensor *obj = priv->priv; | |
113 | ||
f8061d38 SP |
114 | acpi_remove_notify_handler(priv->adev->handle, |
115 | ACPI_DEVICE_NOTIFY, int3403_notify); | |
593df404 SP |
116 | int340x_thermal_zone_remove(obj->int340x_zone); |
117 | ||
4384b8fe LT |
118 | return 0; |
119 | } | |
120 | ||
121 | /* INT3403 Cooling devices */ | |
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 | ||
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 | |
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 | ||
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 | printk(KERN_WARNING "Invalid PPSS data\n"); | |
f01bc8f3 | 185 | kfree(buf.pointer); |
4384b8fe LT |
186 | return -EFAULT; |
187 | } | |
188 | ||
13b86f50 | 189 | priv->priv = obj; |
4384b8fe LT |
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 | ||
f01bc8f3 | 197 | kfree(buf.pointer); |
4384b8fe LT |
198 | /* TODO: add ACPI notification support */ |
199 | ||
200 | return result; | |
201 | } | |
202 | ||
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 | ||
211 | static int int3403_add(struct platform_device *pdev) | |
212 | { | |
213 | struct int3403_priv *priv; | |
214 | int result = 0; | |
6eb61a93 | 215 | unsigned long long tmp; |
4384b8fe LT |
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 | ||
4ca0e75e | 230 | |
6eb61a93 ZR |
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); | |
4ca0e75e SP |
236 | if (ACPI_FAILURE(status)) { |
237 | result = -EINVAL; | |
238 | goto err; | |
4ca0e75e | 239 | } |
6eb61a93 ZR |
240 | } else { |
241 | priv->type = INT3403_TYPE_SENSOR; | |
4384b8fe LT |
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 | ||
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", | |
4384b8fe LT |
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"); |