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authorLen Brown <len.brown@intel.com>2008-12-01 00:09:47 -0500
committerLen Brown <len.brown@intel.com>2008-12-19 04:42:32 -0500
commit41b16dce390510f550a4d2b12b98e0258bbed6e2 (patch)
tree03f668f70c47e7d6319a1b5fc21aa0634254cdb1 /drivers/misc/intel_menlow.c
parent8c36790a21eec6c39c372e92c76e81865005a6ce (diff)
create drivers/platform/x86/ from drivers/misc/
Move x86 platform specific drivers from drivers/misc/ to a new home under drivers/platform/x86/. The community has been maintaining x86 vendor-specific platform specific drivers under /drivers/misc/ for a few years. The oldest ones started life under drivers/acpi. They moved out of drivers/acpi/ because they don't actually implement the ACPI specification, but either simply use ACPI, or implement vendor-specific ACPI extensions. In the future we anticipate... drivers/misc/ will go away. other architectures will create drivers/platform/<arch> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/misc/intel_menlow.c')
-rw-r--r--drivers/misc/intel_menlow.c536
1 files changed, 0 insertions, 536 deletions
diff --git a/drivers/misc/intel_menlow.c b/drivers/misc/intel_menlow.c
deleted file mode 100644
index 27b7662955bb..000000000000
--- a/drivers/misc/intel_menlow.c
+++ /dev/null
@@ -1,536 +0,0 @@
1/*
2 * intel_menlow.c - Intel menlow Driver for thermal management extension
3 *
4 * Copyright (C) 2008 Intel Corp
5 * Copyright (C) 2008 Sujith Thomas <sujith.thomas@intel.com>
6 * Copyright (C) 2008 Zhang Rui <rui.zhang@intel.com>
7 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; version 2 of the License.
12 *
13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License along
19 * with this program; if not, write to the Free Software Foundation, Inc.,
20 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
21 *
22 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
23 *
24 * This driver creates the sys I/F for programming the sensors.
25 * It also implements the driver for intel menlow memory controller (hardware
26 * id is INT0002) which makes use of the platform specific ACPI methods
27 * to get/set bandwidth.
28 */
29
30#include <linux/kernel.h>
31#include <linux/module.h>
32#include <linux/init.h>
33#include <linux/types.h>
34#include <linux/pci.h>
35#include <linux/pm.h>
36
37#include <linux/thermal.h>
38#include <acpi/acpi_bus.h>
39#include <acpi/acpi_drivers.h>
40
41MODULE_AUTHOR("Thomas Sujith");
42MODULE_AUTHOR("Zhang Rui");
43MODULE_DESCRIPTION("Intel Menlow platform specific driver");
44MODULE_LICENSE("GPL");
45
46/*
47 * Memory controller device control
48 */
49
50#define MEMORY_GET_BANDWIDTH "GTHS"
51#define MEMORY_SET_BANDWIDTH "STHS"
52#define MEMORY_ARG_CUR_BANDWIDTH 1
53#define MEMORY_ARG_MAX_BANDWIDTH 0
54
55/*
56 * GTHS returning 'n' would mean that [0,n-1] states are supported
57 * In that case max_cstate would be n-1
58 * GTHS returning '0' would mean that no bandwidth control states are supported
59 */
60static int memory_get_int_max_bandwidth(struct thermal_cooling_device *cdev,
61 unsigned long *max_state)
62{
63 struct acpi_device *device = cdev->devdata;
64 acpi_handle handle = device->handle;
65 unsigned long long value;
66 struct acpi_object_list arg_list;
67 union acpi_object arg;
68 acpi_status status = AE_OK;
69
70 arg_list.count = 1;
71 arg_list.pointer = &arg;
72 arg.type = ACPI_TYPE_INTEGER;
73 arg.integer.value = MEMORY_ARG_MAX_BANDWIDTH;
74 status = acpi_evaluate_integer(handle, MEMORY_GET_BANDWIDTH,
75 &arg_list, &value);
76 if (ACPI_FAILURE(status))
77 return -EFAULT;
78
79 if (!value)
80 return -EINVAL;
81
82 *max_state = value - 1;
83 return 0;
84}
85
86static int memory_get_max_bandwidth(struct thermal_cooling_device *cdev,
87 char *buf)
88{
89 unsigned long value;
90 if (memory_get_int_max_bandwidth(cdev, &value))
91 return -EINVAL;
92
93 return sprintf(buf, "%ld\n", value);
94}
95
96static int memory_get_cur_bandwidth(struct thermal_cooling_device *cdev,
97 char *buf)
98{
99 struct acpi_device *device = cdev->devdata;
100 acpi_handle handle = device->handle;
101 unsigned long long value;
102 struct acpi_object_list arg_list;
103 union acpi_object arg;
104 acpi_status status = AE_OK;
105
106 arg_list.count = 1;
107 arg_list.pointer = &arg;
108 arg.type = ACPI_TYPE_INTEGER;
109 arg.integer.value = MEMORY_ARG_CUR_BANDWIDTH;
110 status = acpi_evaluate_integer(handle, MEMORY_GET_BANDWIDTH,
111 &arg_list, &value);
112 if (ACPI_FAILURE(status))
113 return -EFAULT;
114
115 return sprintf(buf, "%llu\n", value);
116}
117
118static int memory_set_cur_bandwidth(struct thermal_cooling_device *cdev,
119 unsigned int state)
120{
121 struct acpi_device *device = cdev->devdata;
122 acpi_handle handle = device->handle;
123 struct acpi_object_list arg_list;
124 union acpi_object arg;
125 acpi_status status;
126 unsigned long long temp;
127 unsigned long max_state;
128
129 if (memory_get_int_max_bandwidth(cdev, &max_state))
130 return -EFAULT;
131
132 if (state > max_state)
133 return -EINVAL;
134
135 arg_list.count = 1;
136 arg_list.pointer = &arg;
137 arg.type = ACPI_TYPE_INTEGER;
138 arg.integer.value = state;
139
140 status =
141 acpi_evaluate_integer(handle, MEMORY_SET_BANDWIDTH, &arg_list,
142 &temp);
143
144 printk(KERN_INFO
145 "Bandwidth value was %d: status is %d\n", state, status);
146 if (ACPI_FAILURE(status))
147 return -EFAULT;
148
149 return 0;
150}
151
152static struct thermal_cooling_device_ops memory_cooling_ops = {
153 .get_max_state = memory_get_max_bandwidth,
154 .get_cur_state = memory_get_cur_bandwidth,
155 .set_cur_state = memory_set_cur_bandwidth,
156};
157
158/*
159 * Memory Device Management
160 */
161static int intel_menlow_memory_add(struct acpi_device *device)
162{
163 int result = -ENODEV;
164 acpi_status status = AE_OK;
165 acpi_handle dummy;
166 struct thermal_cooling_device *cdev;
167
168 if (!device)
169 return -EINVAL;
170
171 status = acpi_get_handle(device->handle, MEMORY_GET_BANDWIDTH, &dummy);
172 if (ACPI_FAILURE(status))
173 goto end;
174
175 status = acpi_get_handle(device->handle, MEMORY_SET_BANDWIDTH, &dummy);
176 if (ACPI_FAILURE(status))
177 goto end;
178
179 cdev = thermal_cooling_device_register("Memory controller", device,
180 &memory_cooling_ops);
181 if (IS_ERR(cdev)) {
182 result = PTR_ERR(cdev);
183 goto end;
184 }
185
186 device->driver_data = cdev;
187 result = sysfs_create_link(&device->dev.kobj,
188 &cdev->device.kobj, "thermal_cooling");
189 if (result)
190 goto unregister;
191
192 result = sysfs_create_link(&cdev->device.kobj,
193 &device->dev.kobj, "device");
194 if (result) {
195 sysfs_remove_link(&device->dev.kobj, "thermal_cooling");
196 goto unregister;
197 }
198
199 end:
200 return result;
201
202 unregister:
203 thermal_cooling_device_unregister(cdev);
204 return result;
205
206}
207
208static int intel_menlow_memory_remove(struct acpi_device *device, int type)
209{
210 struct thermal_cooling_device *cdev = acpi_driver_data(device);
211
212 if (!device || !cdev)
213 return -EINVAL;
214
215 sysfs_remove_link(&device->dev.kobj, "thermal_cooling");
216 sysfs_remove_link(&cdev->device.kobj, "device");
217 thermal_cooling_device_unregister(cdev);
218
219 return 0;
220}
221
222static const struct acpi_device_id intel_menlow_memory_ids[] = {
223 {"INT0002", 0},
224 {"", 0},
225};
226
227static struct acpi_driver intel_menlow_memory_driver = {
228 .name = "intel_menlow_thermal_control",
229 .ids = intel_menlow_memory_ids,
230 .ops = {
231 .add = intel_menlow_memory_add,
232 .remove = intel_menlow_memory_remove,
233 },
234};
235
236/*
237 * Sensor control on menlow platform
238 */
239
240#define THERMAL_AUX0 0
241#define THERMAL_AUX1 1
242#define GET_AUX0 "GAX0"
243#define GET_AUX1 "GAX1"
244#define SET_AUX0 "SAX0"
245#define SET_AUX1 "SAX1"
246
247struct intel_menlow_attribute {
248 struct device_attribute attr;
249 struct device *device;
250 acpi_handle handle;
251 struct list_head node;
252};
253
254static LIST_HEAD(intel_menlow_attr_list);
255static DEFINE_MUTEX(intel_menlow_attr_lock);
256
257/*
258 * sensor_get_auxtrip - get the current auxtrip value from sensor
259 * @name: Thermalzone name
260 * @auxtype : AUX0/AUX1
261 * @buf: syfs buffer
262 */
263static int sensor_get_auxtrip(acpi_handle handle, int index,
264 unsigned long long *value)
265{
266 acpi_status status;
267
268 if ((index != 0 && index != 1) || !value)
269 return -EINVAL;
270
271 status = acpi_evaluate_integer(handle, index ? GET_AUX1 : GET_AUX0,
272 NULL, value);
273 if (ACPI_FAILURE(status))
274 return -EIO;
275
276 return 0;
277}
278
279/*
280 * sensor_set_auxtrip - set the new auxtrip value to sensor
281 * @name: Thermalzone name
282 * @auxtype : AUX0/AUX1
283 * @buf: syfs buffer
284 */
285static int sensor_set_auxtrip(acpi_handle handle, int index, int value)
286{
287 acpi_status status;
288 union acpi_object arg = {
289 ACPI_TYPE_INTEGER
290 };
291 struct acpi_object_list args = {
292 1, &arg
293 };
294 unsigned long long temp;
295
296 if (index != 0 && index != 1)
297 return -EINVAL;
298
299 status = acpi_evaluate_integer(handle, index ? GET_AUX0 : GET_AUX1,
300 NULL, &temp);
301 if (ACPI_FAILURE(status))
302 return -EIO;
303 if ((index && value < temp) || (!index && value > temp))
304 return -EINVAL;
305
306 arg.integer.value = value;
307 status = acpi_evaluate_integer(handle, index ? SET_AUX1 : SET_AUX0,
308 &args, &temp);
309 if (ACPI_FAILURE(status))
310 return -EIO;
311
312 /* do we need to check the return value of SAX0/SAX1 ? */
313
314 return 0;
315}
316
317#define to_intel_menlow_attr(_attr) \
318 container_of(_attr, struct intel_menlow_attribute, attr)
319
320static ssize_t aux0_show(struct device *dev,
321 struct device_attribute *dev_attr, char *buf)
322{
323 struct intel_menlow_attribute *attr = to_intel_menlow_attr(dev_attr);
324 unsigned long long value;
325 int result;
326
327 result = sensor_get_auxtrip(attr->handle, 0, &value);
328
329 return result ? result : sprintf(buf, "%lu", KELVIN_TO_CELSIUS(value));
330}
331
332static ssize_t aux1_show(struct device *dev,
333 struct device_attribute *dev_attr, char *buf)
334{
335 struct intel_menlow_attribute *attr = to_intel_menlow_attr(dev_attr);
336 unsigned long long value;
337 int result;
338
339 result = sensor_get_auxtrip(attr->handle, 1, &value);
340
341 return result ? result : sprintf(buf, "%lu", KELVIN_TO_CELSIUS(value));
342}
343
344static ssize_t aux0_store(struct device *dev,
345 struct device_attribute *dev_attr,
346 const char *buf, size_t count)
347{
348 struct intel_menlow_attribute *attr = to_intel_menlow_attr(dev_attr);
349 int value;
350 int result;
351
352 /*Sanity check; should be a positive integer */
353 if (!sscanf(buf, "%d", &value))
354 return -EINVAL;
355
356 if (value < 0)
357 return -EINVAL;
358
359 result = sensor_set_auxtrip(attr->handle, 0, CELSIUS_TO_KELVIN(value));
360 return result ? result : count;
361}
362
363static ssize_t aux1_store(struct device *dev,
364 struct device_attribute *dev_attr,
365 const char *buf, size_t count)
366{
367 struct intel_menlow_attribute *attr = to_intel_menlow_attr(dev_attr);
368 int value;
369 int result;
370
371 /*Sanity check; should be a positive integer */
372 if (!sscanf(buf, "%d", &value))
373 return -EINVAL;
374
375 if (value < 0)
376 return -EINVAL;
377
378 result = sensor_set_auxtrip(attr->handle, 1, CELSIUS_TO_KELVIN(value));
379 return result ? result : count;
380}
381
382/* BIOS can enable/disable the thermal user application in dabney platform */
383#define BIOS_ENABLED "\\_TZ.GSTS"
384static ssize_t bios_enabled_show(struct device *dev,
385 struct device_attribute *attr, char *buf)
386{
387 acpi_status status;
388 unsigned long long bios_enabled;
389
390 status = acpi_evaluate_integer(NULL, BIOS_ENABLED, NULL, &bios_enabled);
391 if (ACPI_FAILURE(status))
392 return -ENODEV;
393
394 return sprintf(buf, "%s\n", bios_enabled ? "enabled" : "disabled");
395}
396
397static int intel_menlow_add_one_attribute(char *name, int mode, void *show,
398 void *store, struct device *dev,
399 acpi_handle handle)
400{
401 struct intel_menlow_attribute *attr;
402 int result;
403
404 attr = kzalloc(sizeof(struct intel_menlow_attribute), GFP_KERNEL);
405 if (!attr)
406 return -ENOMEM;
407
408 attr->attr.attr.name = name;
409 attr->attr.attr.mode = mode;
410 attr->attr.show = show;
411 attr->attr.store = store;
412 attr->device = dev;
413 attr->handle = handle;
414
415 result = device_create_file(dev, &attr->attr);
416 if (result)
417 return result;
418
419 mutex_lock(&intel_menlow_attr_lock);
420 list_add_tail(&attr->node, &intel_menlow_attr_list);
421 mutex_unlock(&intel_menlow_attr_lock);
422
423 return 0;
424}
425
426static acpi_status intel_menlow_register_sensor(acpi_handle handle, u32 lvl,
427 void *context, void **rv)
428{
429 acpi_status status;
430 acpi_handle dummy;
431 struct thermal_zone_device *thermal;
432 int result;
433
434 result = acpi_bus_get_private_data(handle, (void **)&thermal);
435 if (result)
436 return 0;
437
438 /* _TZ must have the AUX0/1 methods */
439 status = acpi_get_handle(handle, GET_AUX0, &dummy);
440 if (ACPI_FAILURE(status))
441 goto not_found;
442
443 status = acpi_get_handle(handle, SET_AUX0, &dummy);
444 if (ACPI_FAILURE(status))
445 goto not_found;
446
447 result = intel_menlow_add_one_attribute("aux0", 0644,
448 aux0_show, aux0_store,
449 &thermal->device, handle);
450 if (result)
451 return AE_ERROR;
452
453 status = acpi_get_handle(handle, GET_AUX1, &dummy);
454 if (ACPI_FAILURE(status))
455 goto not_found;
456
457 status = acpi_get_handle(handle, SET_AUX1, &dummy);
458 if (ACPI_FAILURE(status))
459 goto not_found;
460
461 result = intel_menlow_add_one_attribute("aux1", 0644,
462 aux1_show, aux1_store,
463 &thermal->device, handle);
464 if (result)
465 return AE_ERROR;
466
467 /*
468 * create the "dabney_enabled" attribute which means the user app
469 * should be loaded or not
470 */
471
472 result = intel_menlow_add_one_attribute("bios_enabled", 0444,
473 bios_enabled_show, NULL,
474 &thermal->device, handle);
475 if (result)
476 return AE_ERROR;
477
478 not_found:
479 if (status == AE_NOT_FOUND)
480 return AE_OK;
481 else
482 return status;
483}
484
485static void intel_menlow_unregister_sensor(void)
486{
487 struct intel_menlow_attribute *pos, *next;
488
489 mutex_lock(&intel_menlow_attr_lock);
490 list_for_each_entry_safe(pos, next, &intel_menlow_attr_list, node) {
491 list_del(&pos->node);
492 device_remove_file(pos->device, &pos->attr);
493 kfree(pos);
494 }
495 mutex_unlock(&intel_menlow_attr_lock);
496
497 return;
498}
499
500static int __init intel_menlow_module_init(void)
501{
502 int result = -ENODEV;
503 acpi_status status;
504 unsigned long long enable;
505
506 if (acpi_disabled)
507 return result;
508
509 /* Looking for the \_TZ.GSTS method */
510 status = acpi_evaluate_integer(NULL, BIOS_ENABLED, NULL, &enable);
511 if (ACPI_FAILURE(status) || !enable)
512 return -ENODEV;
513
514 /* Looking for ACPI device MEM0 with hardware id INT0002 */
515 result = acpi_bus_register_driver(&intel_menlow_memory_driver);
516 if (result)
517 return result;
518
519 /* Looking for sensors in each ACPI thermal zone */
520 status = acpi_walk_namespace(ACPI_TYPE_THERMAL, ACPI_ROOT_OBJECT,
521 ACPI_UINT32_MAX,
522 intel_menlow_register_sensor, NULL, NULL);
523 if (ACPI_FAILURE(status))
524 return -ENODEV;
525
526 return 0;
527}
528
529static void __exit intel_menlow_module_exit(void)
530{
531 acpi_bus_unregister_driver(&intel_menlow_memory_driver);
532 intel_menlow_unregister_sensor();
533}
534
535module_init(intel_menlow_module_init);
536module_exit(intel_menlow_module_exit);
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-23 07:18:31 -0500