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816cab93 ZR |
1 | /* |
2 | * INT3400 thermal driver | |
3 | * | |
4 | * Copyright (C) 2014, Intel Corporation | |
5 | * Authors: Zhang Rui <rui.zhang@intel.com> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | * | |
11 | */ | |
12 | ||
13 | #include <linux/module.h> | |
14 | #include <linux/platform_device.h> | |
15 | #include <linux/acpi.h> | |
0ab15365 | 16 | #include <linux/thermal.h> |
6306e68a | 17 | #include "acpi_thermal_rel.h" |
816cab93 | 18 | |
c5738ddd ZR |
19 | enum int3400_thermal_uuid { |
20 | INT3400_THERMAL_PASSIVE_1, | |
c5738ddd ZR |
21 | INT3400_THERMAL_ACTIVE, |
22 | INT3400_THERMAL_CRITICAL, | |
14216f18 MG |
23 | INT3400_THERMAL_ADAPTIVE_PERFORMANCE, |
24 | INT3400_THERMAL_EMERGENCY_CALL_MODE, | |
25 | INT3400_THERMAL_PASSIVE_2, | |
26 | INT3400_THERMAL_POWER_BOSS, | |
27 | INT3400_THERMAL_VIRTUAL_SENSOR, | |
28 | INT3400_THERMAL_COOLING_MODE, | |
29 | INT3400_THERMAL_HARDWARE_DUTY_CYCLING, | |
c5738ddd ZR |
30 | INT3400_THERMAL_MAXIMUM_UUID, |
31 | }; | |
32 | ||
33 | static u8 *int3400_thermal_uuids[INT3400_THERMAL_MAXIMUM_UUID] = { | |
34 | "42A441D6-AE6A-462b-A84B-4A8CE79027D3", | |
c5738ddd ZR |
35 | "3A95C389-E4B8-4629-A526-C52C88626BAE", |
36 | "97C68AE7-15FA-499c-B8C9-5DA81D606E0A", | |
14216f18 MG |
37 | "63BE270F-1C11-48FD-A6F7-3AF253FF3E2D", |
38 | "5349962F-71E6-431D-9AE8-0A635B710AEE", | |
39 | "9E04115A-AE87-4D1C-9500-0F3E340BFE75", | |
40 | "F5A35014-C209-46A4-993A-EB56DE7530A1", | |
41 | "6ED722A7-9240-48A5-B479-31EEF723D7CF", | |
42 | "16CAF1B7-DD38-40ED-B1C1-1B8A1913D531", | |
43 | "BE84BABF-C4D4-403D-B495-3128FD44dAC1", | |
c5738ddd ZR |
44 | }; |
45 | ||
816cab93 ZR |
46 | struct int3400_thermal_priv { |
47 | struct acpi_device *adev; | |
0ab15365 ZR |
48 | struct thermal_zone_device *thermal; |
49 | int mode; | |
816cab93 ZR |
50 | int art_count; |
51 | struct art *arts; | |
52 | int trt_count; | |
53 | struct trt *trts; | |
c5738ddd | 54 | u8 uuid_bitmap; |
6306e68a | 55 | int rel_misc_dev_res; |
19ecaea2 SP |
56 | int current_uuid_index; |
57 | }; | |
58 | ||
59 | static ssize_t available_uuids_show(struct device *dev, | |
60 | struct device_attribute *attr, | |
61 | char *buf) | |
62 | { | |
63 | struct platform_device *pdev = to_platform_device(dev); | |
64 | struct int3400_thermal_priv *priv = platform_get_drvdata(pdev); | |
65 | int i; | |
66 | int length = 0; | |
67 | ||
68 | for (i = 0; i < INT3400_THERMAL_MAXIMUM_UUID; i++) { | |
69 | if (priv->uuid_bitmap & (1 << i)) | |
70 | if (PAGE_SIZE - length > 0) | |
71 | length += snprintf(&buf[length], | |
72 | PAGE_SIZE - length, | |
73 | "%s\n", | |
74 | int3400_thermal_uuids[i]); | |
75 | } | |
76 | ||
77 | return length; | |
78 | } | |
79 | ||
80 | static ssize_t current_uuid_show(struct device *dev, | |
81 | struct device_attribute *devattr, char *buf) | |
82 | { | |
83 | struct platform_device *pdev = to_platform_device(dev); | |
84 | struct int3400_thermal_priv *priv = platform_get_drvdata(pdev); | |
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 | ||
93 | static ssize_t current_uuid_store(struct device *dev, | |
94 | struct device_attribute *attr, | |
95 | const char *buf, size_t count) | |
96 | { | |
97 | struct platform_device *pdev = to_platform_device(dev); | |
98 | struct int3400_thermal_priv *priv = platform_get_drvdata(pdev); | |
99 | int i; | |
100 | ||
101 | for (i = 0; i < INT3400_THERMAL_MAXIMUM_UUID; ++i) { | |
102 | if ((priv->uuid_bitmap & (1 << i)) && | |
103 | !(strncmp(buf, int3400_thermal_uuids[i], | |
104 | sizeof(int3400_thermal_uuids[i]) - 1))) { | |
105 | priv->current_uuid_index = i; | |
106 | return count; | |
107 | } | |
108 | } | |
109 | ||
110 | return -EINVAL; | |
111 | } | |
112 | ||
113 | static DEVICE_ATTR(current_uuid, 0644, current_uuid_show, current_uuid_store); | |
114 | static DEVICE_ATTR_RO(available_uuids); | |
115 | static struct attribute *uuid_attrs[] = { | |
116 | &dev_attr_available_uuids.attr, | |
117 | &dev_attr_current_uuid.attr, | |
118 | NULL | |
119 | }; | |
120 | ||
121 | static struct attribute_group uuid_attribute_group = { | |
122 | .attrs = uuid_attrs, | |
123 | .name = "uuids" | |
816cab93 ZR |
124 | }; |
125 | ||
c5738ddd ZR |
126 | static int int3400_thermal_get_uuids(struct int3400_thermal_priv *priv) |
127 | { | |
128 | struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER, NULL}; | |
129 | union acpi_object *obja, *objb; | |
130 | int i, j; | |
131 | int result = 0; | |
132 | acpi_status status; | |
133 | ||
134 | status = acpi_evaluate_object(priv->adev->handle, "IDSP", NULL, &buf); | |
135 | if (ACPI_FAILURE(status)) | |
136 | return -ENODEV; | |
137 | ||
138 | obja = (union acpi_object *)buf.pointer; | |
139 | if (obja->type != ACPI_TYPE_PACKAGE) { | |
140 | result = -EINVAL; | |
141 | goto end; | |
142 | } | |
143 | ||
144 | for (i = 0; i < obja->package.count; i++) { | |
145 | objb = &obja->package.elements[i]; | |
146 | if (objb->type != ACPI_TYPE_BUFFER) { | |
147 | result = -EINVAL; | |
148 | goto end; | |
149 | } | |
150 | ||
151 | /* UUID must be 16 bytes */ | |
152 | if (objb->buffer.length != 16) { | |
153 | result = -EINVAL; | |
154 | goto end; | |
155 | } | |
156 | ||
157 | for (j = 0; j < INT3400_THERMAL_MAXIMUM_UUID; j++) { | |
158 | u8 uuid[16]; | |
159 | ||
160 | acpi_str_to_uuid(int3400_thermal_uuids[j], uuid); | |
161 | if (!strncmp(uuid, objb->buffer.pointer, 16)) { | |
162 | priv->uuid_bitmap |= (1 << j); | |
163 | break; | |
164 | } | |
165 | } | |
166 | } | |
167 | ||
168 | end: | |
169 | kfree(buf.pointer); | |
170 | return result; | |
171 | } | |
172 | ||
0ab15365 ZR |
173 | static int int3400_thermal_run_osc(acpi_handle handle, |
174 | enum int3400_thermal_uuid uuid, bool enable) | |
175 | { | |
176 | u32 ret, buf[2]; | |
177 | acpi_status status; | |
178 | int result = 0; | |
179 | struct acpi_osc_context context = { | |
180 | .uuid_str = int3400_thermal_uuids[uuid], | |
181 | .rev = 1, | |
182 | .cap.length = 8, | |
183 | }; | |
184 | ||
185 | buf[OSC_QUERY_DWORD] = 0; | |
186 | buf[OSC_SUPPORT_DWORD] = enable; | |
187 | ||
188 | context.cap.pointer = buf; | |
189 | ||
190 | status = acpi_run_osc(handle, &context); | |
191 | if (ACPI_SUCCESS(status)) { | |
192 | ret = *((u32 *)(context.ret.pointer + 4)); | |
193 | if (ret != enable) | |
194 | result = -EPERM; | |
195 | } else | |
196 | result = -EPERM; | |
197 | ||
198 | kfree(context.ret.pointer); | |
199 | return result; | |
200 | } | |
201 | ||
0ab15365 | 202 | static int int3400_thermal_get_temp(struct thermal_zone_device *thermal, |
17e8351a | 203 | int *temp) |
0ab15365 ZR |
204 | { |
205 | *temp = 20 * 1000; /* faked temp sensor with 20C */ | |
206 | return 0; | |
207 | } | |
208 | ||
209 | static int int3400_thermal_get_mode(struct thermal_zone_device *thermal, | |
210 | enum thermal_device_mode *mode) | |
211 | { | |
212 | struct int3400_thermal_priv *priv = thermal->devdata; | |
213 | ||
214 | if (!priv) | |
215 | return -EINVAL; | |
216 | ||
217 | *mode = priv->mode; | |
218 | ||
219 | return 0; | |
220 | } | |
221 | ||
222 | static int int3400_thermal_set_mode(struct thermal_zone_device *thermal, | |
223 | enum thermal_device_mode mode) | |
224 | { | |
225 | struct int3400_thermal_priv *priv = thermal->devdata; | |
226 | bool enable; | |
227 | int result = 0; | |
228 | ||
229 | if (!priv) | |
230 | return -EINVAL; | |
231 | ||
232 | if (mode == THERMAL_DEVICE_ENABLED) | |
233 | enable = true; | |
234 | else if (mode == THERMAL_DEVICE_DISABLED) | |
235 | enable = false; | |
236 | else | |
237 | return -EINVAL; | |
238 | ||
239 | if (enable != priv->mode) { | |
240 | priv->mode = enable; | |
0ab15365 | 241 | result = int3400_thermal_run_osc(priv->adev->handle, |
19ecaea2 SP |
242 | priv->current_uuid_index, |
243 | enable); | |
0ab15365 ZR |
244 | } |
245 | return result; | |
246 | } | |
247 | ||
248 | static struct thermal_zone_device_ops int3400_thermal_ops = { | |
249 | .get_temp = int3400_thermal_get_temp, | |
250 | }; | |
251 | ||
252 | static struct thermal_zone_params int3400_thermal_params = { | |
253 | .governor_name = "user_space", | |
254 | .no_hwmon = true, | |
255 | }; | |
256 | ||
816cab93 ZR |
257 | static int int3400_thermal_probe(struct platform_device *pdev) |
258 | { | |
259 | struct acpi_device *adev = ACPI_COMPANION(&pdev->dev); | |
260 | struct int3400_thermal_priv *priv; | |
261 | int result; | |
262 | ||
263 | if (!adev) | |
264 | return -ENODEV; | |
265 | ||
266 | priv = kzalloc(sizeof(struct int3400_thermal_priv), GFP_KERNEL); | |
267 | if (!priv) | |
268 | return -ENOMEM; | |
269 | ||
270 | priv->adev = adev; | |
271 | ||
c5738ddd ZR |
272 | result = int3400_thermal_get_uuids(priv); |
273 | if (result) | |
274 | goto free_priv; | |
275 | ||
6306e68a JP |
276 | result = acpi_parse_art(priv->adev->handle, &priv->art_count, |
277 | &priv->arts, true); | |
816cab93 | 278 | if (result) |
f1260791 | 279 | dev_dbg(&pdev->dev, "_ART table parsing error\n"); |
6306e68a JP |
280 | |
281 | result = acpi_parse_trt(priv->adev->handle, &priv->trt_count, | |
282 | &priv->trts, true); | |
816cab93 | 283 | if (result) |
f1260791 | 284 | dev_dbg(&pdev->dev, "_TRT table parsing error\n"); |
816cab93 ZR |
285 | |
286 | platform_set_drvdata(pdev, priv); | |
287 | ||
0ab15365 ZR |
288 | if (priv->uuid_bitmap & 1 << INT3400_THERMAL_PASSIVE_1) { |
289 | int3400_thermal_ops.get_mode = int3400_thermal_get_mode; | |
290 | int3400_thermal_ops.set_mode = int3400_thermal_set_mode; | |
291 | } | |
292 | priv->thermal = thermal_zone_device_register("INT3400 Thermal", 0, 0, | |
293 | priv, &int3400_thermal_ops, | |
294 | &int3400_thermal_params, 0, 0); | |
295 | if (IS_ERR(priv->thermal)) { | |
296 | result = PTR_ERR(priv->thermal); | |
f1260791 | 297 | goto free_art_trt; |
0ab15365 ZR |
298 | } |
299 | ||
6306e68a JP |
300 | priv->rel_misc_dev_res = acpi_thermal_rel_misc_device_add( |
301 | priv->adev->handle); | |
302 | ||
19ecaea2 SP |
303 | result = sysfs_create_group(&pdev->dev.kobj, &uuid_attribute_group); |
304 | if (result) | |
305 | goto free_zone; | |
306 | ||
816cab93 | 307 | return 0; |
19ecaea2 SP |
308 | |
309 | free_zone: | |
310 | thermal_zone_device_unregister(priv->thermal); | |
f1260791 | 311 | free_art_trt: |
0ab15365 | 312 | kfree(priv->trts); |
816cab93 ZR |
313 | kfree(priv->arts); |
314 | free_priv: | |
315 | kfree(priv); | |
316 | return result; | |
317 | } | |
318 | ||
319 | static int int3400_thermal_remove(struct platform_device *pdev) | |
320 | { | |
321 | struct int3400_thermal_priv *priv = platform_get_drvdata(pdev); | |
322 | ||
6306e68a JP |
323 | if (!priv->rel_misc_dev_res) |
324 | acpi_thermal_rel_misc_device_remove(priv->adev->handle); | |
325 | ||
19ecaea2 | 326 | sysfs_remove_group(&pdev->dev.kobj, &uuid_attribute_group); |
0ab15365 | 327 | thermal_zone_device_unregister(priv->thermal); |
816cab93 ZR |
328 | kfree(priv->trts); |
329 | kfree(priv->arts); | |
330 | kfree(priv); | |
331 | return 0; | |
332 | } | |
333 | ||
334 | static const struct acpi_device_id int3400_thermal_match[] = { | |
335 | {"INT3400", 0}, | |
336 | {} | |
337 | }; | |
338 | ||
339 | MODULE_DEVICE_TABLE(acpi, int3400_thermal_match); | |
340 | ||
341 | static struct platform_driver int3400_thermal_driver = { | |
342 | .probe = int3400_thermal_probe, | |
343 | .remove = int3400_thermal_remove, | |
344 | .driver = { | |
345 | .name = "int3400 thermal", | |
816cab93 ZR |
346 | .acpi_match_table = ACPI_PTR(int3400_thermal_match), |
347 | }, | |
348 | }; | |
349 | ||
350 | module_platform_driver(int3400_thermal_driver); | |
351 | ||
352 | MODULE_DESCRIPTION("INT3400 Thermal driver"); | |
353 | MODULE_AUTHOR("Zhang Rui <rui.zhang@intel.com>"); | |
354 | MODULE_LICENSE("GPL"); |