1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
|
/*
* pnpacpi -- PnP ACPI driver
*
* Copyright (c) 2004 Matthieu Castet <castet.matthieu@free.fr>
* Copyright (c) 2004 Li Shaohua <shaohua.li@intel.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2, or (at your option) any
* later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/export.h>
#include <linux/acpi.h>
#include <linux/pnp.h>
#include <linux/slab.h>
#include <linux/mod_devicetable.h>
#include <acpi/acpi_bus.h>
#include "../base.h"
#include "pnpacpi.h"
static int num;
/* We need only to blacklist devices that have already an acpi driver that
* can't use pnp layer. We don't need to blacklist device that are directly
* used by the kernel (PCI root, ...), as it is harmless and there were
* already present in pnpbios. But there is an exception for devices that
* have irqs (PIC, Timer) because we call acpi_register_gsi.
* Finally, only devices that have a CRS method need to be in this list.
*/
static struct acpi_device_id excluded_id_list[] __initdata = {
{"PNP0C09", 0}, /* EC */
{"PNP0C0F", 0}, /* Link device */
{"PNP0000", 0}, /* PIC */
{"PNP0100", 0}, /* Timer */
{"", 0},
};
static inline int __init is_exclusive_device(struct acpi_device *dev)
{
return (!acpi_match_device_ids(dev, excluded_id_list));
}
/*
* Compatible Device IDs
*/
#define TEST_HEX(c) \
if (!(('0' <= (c) && (c) <= '9') || ('A' <= (c) && (c) <= 'F'))) \
return 0
#define TEST_ALPHA(c) \
if (!('@' <= (c) || (c) <= 'Z')) \
return 0
static int __init ispnpidacpi(const char *id)
{
TEST_ALPHA(id[0]);
TEST_ALPHA(id[1]);
TEST_ALPHA(id[2]);
TEST_HEX(id[3]);
TEST_HEX(id[4]);
TEST_HEX(id[5]);
TEST_HEX(id[6]);
if (id[7] != '\0')
return 0;
return 1;
}
static int pnpacpi_get_resources(struct pnp_dev *dev)
{
pnp_dbg(&dev->dev, "get resources\n");
return pnpacpi_parse_allocated_resource(dev);
}
static int pnpacpi_set_resources(struct pnp_dev *dev)
{
struct acpi_device *acpi_dev;
acpi_handle handle;
struct acpi_buffer buffer;
int ret;
pnp_dbg(&dev->dev, "set resources\n");
handle = DEVICE_ACPI_HANDLE(&dev->dev);
if (!handle || ACPI_FAILURE(acpi_bus_get_device(handle, &acpi_dev))) {
dev_dbg(&dev->dev, "ACPI device not found in %s!\n", __func__);
return -ENODEV;
}
ret = pnpacpi_build_resource_template(dev, &buffer);
if (ret)
return ret;
ret = pnpacpi_encode_resources(dev, &buffer);
if (ret) {
kfree(buffer.pointer);
return ret;
}
if (ACPI_FAILURE(acpi_set_current_resources(handle, &buffer)))
ret = -EINVAL;
else if (acpi_bus_power_manageable(handle))
ret = acpi_bus_set_power(handle, ACPI_STATE_D0);
kfree(buffer.pointer);
return ret;
}
static int pnpacpi_disable_resources(struct pnp_dev *dev)
{
struct acpi_device *acpi_dev;
acpi_handle handle;
int ret;
dev_dbg(&dev->dev, "disable resources\n");
handle = DEVICE_ACPI_HANDLE(&dev->dev);
if (!handle || ACPI_FAILURE(acpi_bus_get_device(handle, &acpi_dev))) {
dev_dbg(&dev->dev, "ACPI device not found in %s!\n", __func__);
return 0;
}
/* acpi_unregister_gsi(pnp_irq(dev, 0)); */
ret = 0;
if (acpi_bus_power_manageable(handle))
acpi_bus_set_power(handle, ACPI_STATE_D3);
/* continue even if acpi_bus_set_power() fails */
if (ACPI_FAILURE(acpi_evaluate_object(handle, "_DIS", NULL, NULL)))
ret = -ENODEV;
return ret;
}
#ifdef CONFIG_ACPI_SLEEP
static bool pnpacpi_can_wakeup(struct pnp_dev *dev)
{
struct acpi_device *acpi_dev;
acpi_handle handle;
handle = DEVICE_ACPI_HANDLE(&dev->dev);
if (!handle || ACPI_FAILURE(acpi_bus_get_device(handle, &acpi_dev))) {
dev_dbg(&dev->dev, "ACPI device not found in %s!\n", __func__);
return false;
}
return acpi_bus_can_wakeup(handle);
}
static int pnpacpi_suspend(struct pnp_dev *dev, pm_message_t state)
{
struct acpi_device *acpi_dev;
acpi_handle handle;
int error = 0;
handle = DEVICE_ACPI_HANDLE(&dev->dev);
if (!handle || ACPI_FAILURE(acpi_bus_get_device(handle, &acpi_dev))) {
dev_dbg(&dev->dev, "ACPI device not found in %s!\n", __func__);
return 0;
}
if (device_can_wakeup(&dev->dev)) {
error = acpi_pm_device_sleep_wake(&dev->dev,
device_may_wakeup(&dev->dev));
if (error)
return error;
}
if (acpi_bus_power_manageable(handle)) {
int power_state = acpi_pm_device_sleep_state(&dev->dev, NULL);
if (power_state < 0)
power_state = (state.event == PM_EVENT_ON) ?
ACPI_STATE_D0 : ACPI_STATE_D3;
/*
* acpi_bus_set_power() often fails (keyboard port can't be
* powered-down?), and in any case, our return value is ignored
* by pnp_bus_suspend(). Hence we don't revert the wakeup
* setting if the set_power fails.
*/
error = acpi_bus_set_power(handle, power_state);
}
return error;
}
static int pnpacpi_resume(struct pnp_dev *dev)
{
struct acpi_device *acpi_dev;
acpi_handle handle = DEVICE_ACPI_HANDLE(&dev->dev);
int error = 0;
if (!handle || ACPI_FAILURE(acpi_bus_get_device(handle, &acpi_dev))) {
dev_dbg(&dev->dev, "ACPI device not found in %s!\n", __func__);
return -ENODEV;
}
if (device_may_wakeup(&dev->dev))
acpi_pm_device_sleep_wake(&dev->dev, false);
if (acpi_bus_power_manageable(handle))
error = acpi_bus_set_power(handle, ACPI_STATE_D0);
return error;
}
#endif
struct pnp_protocol pnpacpi_protocol = {
.name = "Plug and Play ACPI",
.get = pnpacpi_get_resources,
.set = pnpacpi_set_resources,
.disable = pnpacpi_disable_resources,
#ifdef CONFIG_ACPI_SLEEP
.can_wakeup = pnpacpi_can_wakeup,
.suspend = pnpacpi_suspend,
.resume = pnpacpi_resume,
#endif
};
EXPORT_SYMBOL(pnpacpi_protocol);
static char *__init pnpacpi_get_id(struct acpi_device *device)
{
struct acpi_hardware_id *id;
list_for_each_entry(id, &device->pnp.ids, list) {
if (ispnpidacpi(id->id))
return id->id;
}
return NULL;
}
static int __init pnpacpi_add_device(struct acpi_device *device)
{
acpi_handle temp = NULL;
acpi_status status;
struct pnp_dev *dev;
char *pnpid;
struct acpi_hardware_id *id;
/*
* If a PnPacpi device is not present , the device
* driver should not be loaded.
*/
status = acpi_get_handle(device->handle, "_CRS", &temp);
if (ACPI_FAILURE(status))
return 0;
pnpid = pnpacpi_get_id(device);
if (!pnpid)
return 0;
if (is_exclusive_device(device) || !device->status.present)
return 0;
dev = pnp_alloc_dev(&pnpacpi_protocol, num, pnpid);
if (!dev)
return -ENOMEM;
dev->data = device;
/* .enabled means the device can decode the resources */
dev->active = device->status.enabled;
status = acpi_get_handle(device->handle, "_SRS", &temp);
if (ACPI_SUCCESS(status))
dev->capabilities |= PNP_CONFIGURABLE;
dev->capabilities |= PNP_READ;
if (device->flags.dynamic_status && (dev->capabilities & PNP_CONFIGURABLE))
dev->capabilities |= PNP_WRITE;
if (device->flags.removable)
dev->capabilities |= PNP_REMOVABLE;
|