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13#include <linux/module.h>
14#include <linux/platform_device.h>
15#include <linux/acpi.h>
16#include <linux/thermal.h>
17#include "acpi_thermal_rel.h"
18
19#define INT3400_THERMAL_TABLE_CHANGED 0x83
20
21enum int3400_thermal_uuid {
22 INT3400_THERMAL_PASSIVE_1,
23 INT3400_THERMAL_ACTIVE,
24 INT3400_THERMAL_CRITICAL,
25 INT3400_THERMAL_ADAPTIVE_PERFORMANCE,
26 INT3400_THERMAL_EMERGENCY_CALL_MODE,
27 INT3400_THERMAL_PASSIVE_2,
28 INT3400_THERMAL_POWER_BOSS,
29 INT3400_THERMAL_VIRTUAL_SENSOR,
30 INT3400_THERMAL_COOLING_MODE,
31 INT3400_THERMAL_HARDWARE_DUTY_CYCLING,
32 INT3400_THERMAL_MAXIMUM_UUID,
33};
34
35static char *int3400_thermal_uuids[INT3400_THERMAL_MAXIMUM_UUID] = {
36 "42A441D6-AE6A-462b-A84B-4A8CE79027D3",
37 "3A95C389-E4B8-4629-A526-C52C88626BAE",
38 "97C68AE7-15FA-499c-B8C9-5DA81D606E0A",
39 "63BE270F-1C11-48FD-A6F7-3AF253FF3E2D",
40 "5349962F-71E6-431D-9AE8-0A635B710AEE",
41 "9E04115A-AE87-4D1C-9500-0F3E340BFE75",
42 "F5A35014-C209-46A4-993A-EB56DE7530A1",
43 "6ED722A7-9240-48A5-B479-31EEF723D7CF",
44 "16CAF1B7-DD38-40ED-B1C1-1B8A1913D531",
45 "BE84BABF-C4D4-403D-B495-3128FD44dAC1",
46};
47
48struct int3400_thermal_priv {
49 struct acpi_device *adev;
50 struct thermal_zone_device *thermal;
51 int mode;
52 int art_count;
53 struct art *arts;
54 int trt_count;
55 struct trt *trts;
56 u8 uuid_bitmap;
57 int rel_misc_dev_res;
58 int current_uuid_index;
59};
60
61static ssize_t available_uuids_show(struct device *dev,
62 struct device_attribute *attr,
63 char *buf)
64{
65 struct int3400_thermal_priv *priv = dev_get_drvdata(dev);
66 int i;
67 int length = 0;
68
69 for (i = 0; i < INT3400_THERMAL_MAXIMUM_UUID; i++) {
70 if (priv->uuid_bitmap & (1 << i))
71 if (PAGE_SIZE - length > 0)
72 length += snprintf(&buf[length],
73 PAGE_SIZE - length,
74 "%s\n",
75 int3400_thermal_uuids[i]);
76 }
77
78 return length;
79}
80
81static ssize_t current_uuid_show(struct device *dev,
82 struct device_attribute *devattr, char *buf)
83{
84 struct int3400_thermal_priv *priv = dev_get_drvdata(dev);
85
86 if (priv->uuid_bitmap & (1 << priv->current_uuid_index))
87 return sprintf(buf, "%s\n",
88 int3400_thermal_uuids[priv->current_uuid_index]);
89 else
90 return sprintf(buf, "INVALID\n");
91}
92
93static ssize_t current_uuid_store(struct device *dev,
94 struct device_attribute *attr,
95 const char *buf, size_t count)
96{
97 struct int3400_thermal_priv *priv = dev_get_drvdata(dev);
98 int i;
99
100 for (i = 0; i < INT3400_THERMAL_MAXIMUM_UUID; ++i) {
101 if ((priv->uuid_bitmap & (1 << i)) &&
102 !(strncmp(buf, int3400_thermal_uuids[i],
103 sizeof(int3400_thermal_uuids[i]) - 1))) {
104 priv->current_uuid_index = i;
105 return count;
106 }
107 }
108
109 return -EINVAL;
110}
111
112static DEVICE_ATTR_RW(current_uuid);
113static DEVICE_ATTR_RO(available_uuids);
114static struct attribute *uuid_attrs[] = {
115 &dev_attr_available_uuids.attr,
116 &dev_attr_current_uuid.attr,
117 NULL
118};
119
120static const struct attribute_group uuid_attribute_group = {
121 .attrs = uuid_attrs,
122 .name = "uuids"
123};
124
125static int int3400_thermal_get_uuids(struct int3400_thermal_priv *priv)
126{
127 struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER, NULL};
128 union acpi_object *obja, *objb;
129 int i, j;
130 int result = 0;
131 acpi_status status;
132
133 status = acpi_evaluate_object(priv->adev->handle, "IDSP", NULL, &buf);
134 if (ACPI_FAILURE(status))
135 return -ENODEV;
136
137 obja = (union acpi_object *)buf.pointer;
138 if (obja->type != ACPI_TYPE_PACKAGE) {
139 result = -EINVAL;
140 goto end;
141 }
142
143 for (i = 0; i < obja->package.count; i++) {
144 objb = &obja->package.elements[i];
145 if (objb->type != ACPI_TYPE_BUFFER) {
146 result = -EINVAL;
147 goto end;
148 }
149
150
151 if (objb->buffer.length != 16) {
152 result = -EINVAL;
153 goto end;
154 }
155
156 for (j = 0; j < INT3400_THERMAL_MAXIMUM_UUID; j++) {
157 guid_t guid;
158
159 guid_parse(int3400_thermal_uuids[j], &guid);
160 if (guid_equal((guid_t *)objb->buffer.pointer, &guid)) {
161 priv->uuid_bitmap |= (1 << j);
162 break;
163 }
164 }
165 }
166
167end:
168 kfree(buf.pointer);
169 return result;
170}
171
172static int int3400_thermal_run_osc(acpi_handle handle,
173 enum int3400_thermal_uuid uuid, bool enable)
174{
175 u32 ret, buf[2];
176 acpi_status status;
177 int result = 0;
178 struct acpi_osc_context context = {
179 .uuid_str = int3400_thermal_uuids[uuid],
180 .rev = 1,
181 .cap.length = 8,
182 };
183
184 buf[OSC_QUERY_DWORD] = 0;
185 buf[OSC_SUPPORT_DWORD] = enable;
186
187 context.cap.pointer = buf;
188
189 status = acpi_run_osc(handle, &context);
190 if (ACPI_SUCCESS(status)) {
191 ret = *((u32 *)(context.ret.pointer + 4));
192 if (ret != enable)
193 result = -EPERM;
194 } else
195 result = -EPERM;
196
197 kfree(context.ret.pointer);
198 return result;
199}
200
201static void int3400_notify(acpi_handle handle,
202 u32 event,
203 void *data)
204{
205 struct int3400_thermal_priv *priv = data;
206 char *thermal_prop[5];
207
208 if (!priv)
209 return;
210
211 switch (event) {
212 case INT3400_THERMAL_TABLE_CHANGED:
213 thermal_prop[0] = kasprintf(GFP_KERNEL, "NAME=%s",
214 priv->thermal->type);
215 thermal_prop[1] = kasprintf(GFP_KERNEL, "TEMP=%d",
216 priv->thermal->temperature);
217 thermal_prop[2] = kasprintf(GFP_KERNEL, "TRIP=");
218 thermal_prop[3] = kasprintf(GFP_KERNEL, "EVENT=%d",
219 THERMAL_TABLE_CHANGED);
220 thermal_prop[4] = NULL;
221 kobject_uevent_env(&priv->thermal->device.kobj, KOBJ_CHANGE,
222 thermal_prop);
223 break;
224 default:
225
226 break;
227 }
228}
229
230static int int3400_thermal_get_temp(struct thermal_zone_device *thermal,
231 int *temp)
232{
233 *temp = 20 * 1000;
234 return 0;
235}
236
237static int int3400_thermal_get_mode(struct thermal_zone_device *thermal,
238 enum thermal_device_mode *mode)
239{
240 struct int3400_thermal_priv *priv = thermal->devdata;
241
242 if (!priv)
243 return -EINVAL;
244
245 *mode = priv->mode;
246
247 return 0;
248}
249
250static int int3400_thermal_set_mode(struct thermal_zone_device *thermal,
251 enum thermal_device_mode mode)
252{
253 struct int3400_thermal_priv *priv = thermal->devdata;
254 bool enable;
255 int result = 0;
256
257 if (!priv)
258 return -EINVAL;
259
260 if (mode == THERMAL_DEVICE_ENABLED)
261 enable = true;
262 else if (mode == THERMAL_DEVICE_DISABLED)
263 enable = false;
264 else
265 return -EINVAL;
266
267 if (enable != priv->mode) {
268 priv->mode = enable;
269 result = int3400_thermal_run_osc(priv->adev->handle,
270 priv->current_uuid_index,
271 enable);
272 }
273 return result;
274}
275
276static struct thermal_zone_device_ops int3400_thermal_ops = {
277 .get_temp = int3400_thermal_get_temp,
278};
279
280static struct thermal_zone_params int3400_thermal_params = {
281 .governor_name = "user_space",
282 .no_hwmon = true,
283};
284
285static int int3400_thermal_probe(struct platform_device *pdev)
286{
287 struct acpi_device *adev = ACPI_COMPANION(&pdev->dev);
288 struct int3400_thermal_priv *priv;
289 int result;
290
291 if (!adev)
292 return -ENODEV;
293
294 priv = kzalloc(sizeof(struct int3400_thermal_priv), GFP_KERNEL);
295 if (!priv)
296 return -ENOMEM;
297
298 priv->adev = adev;
299
300 result = int3400_thermal_get_uuids(priv);
301 if (result)
302 goto free_priv;
303
304 result = acpi_parse_art(priv->adev->handle, &priv->art_count,
305 &priv->arts, true);
306 if (result)
307 dev_dbg(&pdev->dev, "_ART table parsing error\n");
308
309 result = acpi_parse_trt(priv->adev->handle, &priv->trt_count,
310 &priv->trts, true);
311 if (result)
312 dev_dbg(&pdev->dev, "_TRT table parsing error\n");
313
314 platform_set_drvdata(pdev, priv);
315
316 int3400_thermal_ops.get_mode = int3400_thermal_get_mode;
317 int3400_thermal_ops.set_mode = int3400_thermal_set_mode;
318
319 priv->thermal = thermal_zone_device_register("INT3400 Thermal", 0, 0,
320 priv, &int3400_thermal_ops,
321 &int3400_thermal_params, 0, 0);
322 if (IS_ERR(priv->thermal)) {
323 result = PTR_ERR(priv->thermal);
324 goto free_art_trt;
325 }
326
327 priv->rel_misc_dev_res = acpi_thermal_rel_misc_device_add(
328 priv->adev->handle);
329
330 result = sysfs_create_group(&pdev->dev.kobj, &uuid_attribute_group);
331 if (result)
332 goto free_rel_misc;
333
334 result = acpi_install_notify_handler(
335 priv->adev->handle, ACPI_DEVICE_NOTIFY, int3400_notify,
336 (void *)priv);
337 if (result)
338 goto free_sysfs;
339
340 return 0;
341
342free_sysfs:
343 sysfs_remove_group(&pdev->dev.kobj, &uuid_attribute_group);
344free_rel_misc:
345 if (!priv->rel_misc_dev_res)
346 acpi_thermal_rel_misc_device_remove(priv->adev->handle);
347 thermal_zone_device_unregister(priv->thermal);
348free_art_trt:
349 kfree(priv->trts);
350 kfree(priv->arts);
351free_priv:
352 kfree(priv);
353 return result;
354}
355
356static int int3400_thermal_remove(struct platform_device *pdev)
357{
358 struct int3400_thermal_priv *priv = platform_get_drvdata(pdev);
359
360 acpi_remove_notify_handler(
361 priv->adev->handle, ACPI_DEVICE_NOTIFY,
362 int3400_notify);
363
364 if (!priv->rel_misc_dev_res)
365 acpi_thermal_rel_misc_device_remove(priv->adev->handle);
366
367 sysfs_remove_group(&pdev->dev.kobj, &uuid_attribute_group);
368 thermal_zone_device_unregister(priv->thermal);
369 kfree(priv->trts);
370 kfree(priv->arts);
371 kfree(priv);
372 return 0;
373}
374
375static const struct acpi_device_id int3400_thermal_match[] = {
376 {"INT3400", 0},
377 {}
378};
379
380MODULE_DEVICE_TABLE(acpi, int3400_thermal_match);
381
382static struct platform_driver int3400_thermal_driver = {
383 .probe = int3400_thermal_probe,
384 .remove = int3400_thermal_remove,
385 .driver = {
386 .name = "int3400 thermal",
387 .acpi_match_table = ACPI_PTR(int3400_thermal_match),
388 },
389};
390
391module_platform_driver(int3400_thermal_driver);
392
393MODULE_DESCRIPTION("INT3400 Thermal driver");
394MODULE_AUTHOR("Zhang Rui <rui.zhang@intel.com>");
395MODULE_LICENSE("GPL");
396
