bus.c 18.8 KB
Newer Older
L
Linus Torvalds 已提交
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
/*
 *  acpi_bus.c - ACPI Bus Driver ($Revision: 80 $)
 *
 *  Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@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 of the License, 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/module.h>
#include <linux/init.h>
#include <linux/ioport.h>
28
#include <linux/kernel.h>
L
Linus Torvalds 已提交
29 30 31 32 33 34 35 36 37 38 39 40
#include <linux/list.h>
#include <linux/sched.h>
#include <linux/pm.h>
#include <linux/device.h>
#include <linux/proc_fs.h>
#ifdef CONFIG_X86
#include <asm/mpspec.h>
#endif
#include <acpi/acpi_bus.h>
#include <acpi/acpi_drivers.h>

#define _COMPONENT		ACPI_BUS_COMPONENT
41
ACPI_MODULE_NAME("bus");
L
Linus Torvalds 已提交
42 43 44 45
#ifdef	CONFIG_X86
extern void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger);
#endif

L
Len Brown 已提交
46 47
struct acpi_device *acpi_root;
struct proc_dir_entry *acpi_root_dir;
L
Linus Torvalds 已提交
48 49 50 51 52 53 54 55
EXPORT_SYMBOL(acpi_root_dir);

#define STRUCT_TO_INT(s)	(*((int*)&s))

/* --------------------------------------------------------------------------
                                Device Management
   -------------------------------------------------------------------------- */

L
Len Brown 已提交
56
int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device)
L
Linus Torvalds 已提交
57
{
L
Len Brown 已提交
58
	acpi_status status = AE_OK;
L
Linus Torvalds 已提交
59 60 61


	if (!device)
62
		return -EINVAL;
L
Linus Torvalds 已提交
63 64 65

	/* TBD: Support fixed-feature devices */

L
Len Brown 已提交
66
	status = acpi_get_data(handle, acpi_bus_data_handler, (void **)device);
L
Linus Torvalds 已提交
67
	if (ACPI_FAILURE(status) || !*device) {
68 69
		ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No context for object [%p]\n",
				  handle));
70
		return -ENODEV;
L
Linus Torvalds 已提交
71 72
	}

73
	return 0;
L
Linus Torvalds 已提交
74
}
L
Len Brown 已提交
75

L
Linus Torvalds 已提交
76 77
EXPORT_SYMBOL(acpi_bus_get_device);

L
Len Brown 已提交
78
int acpi_bus_get_status(struct acpi_device *device)
L
Linus Torvalds 已提交
79
{
L
Len Brown 已提交
80 81 82
	acpi_status status = AE_OK;
	unsigned long sta = 0;

L
Linus Torvalds 已提交
83 84

	if (!device)
85
		return -EINVAL;
L
Linus Torvalds 已提交
86 87 88 89 90

	/*
	 * Evaluate _STA if present.
	 */
	if (device->flags.dynamic_status) {
L
Len Brown 已提交
91 92
		status =
		    acpi_evaluate_integer(device->handle, "_STA", NULL, &sta);
L
Linus Torvalds 已提交
93
		if (ACPI_FAILURE(status))
94
			return -ENODEV;
L
Len Brown 已提交
95
		STRUCT_TO_INT(device->status) = (int)sta;
L
Linus Torvalds 已提交
96 97 98 99 100 101 102 103 104
	}

	/*
	 * Otherwise we assume the status of our parent (unless we don't
	 * have one, in which case status is implied).
	 */
	else if (device->parent)
		device->status = device->parent->status;
	else
105 106 107
		STRUCT_TO_INT(device->status) =
		    ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED |
		    ACPI_STA_DEVICE_UI      | ACPI_STA_DEVICE_FUNCTIONING;
L
Linus Torvalds 已提交
108 109 110

	if (device->status.functional && !device->status.present) {
		printk(KERN_WARNING PREFIX "Device [%s] status [%08x]: "
L
Len Brown 已提交
111 112
		       "functional but not present; setting present\n",
		       device->pnp.bus_id, (u32) STRUCT_TO_INT(device->status));
L
Linus Torvalds 已提交
113 114 115
		device->status.present = 1;
	}

L
Len Brown 已提交
116 117 118
	ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]\n",
			  device->pnp.bus_id,
			  (u32) STRUCT_TO_INT(device->status)));
L
Linus Torvalds 已提交
119

120
	return 0;
L
Linus Torvalds 已提交
121 122
}

L
Len Brown 已提交
123
EXPORT_SYMBOL(acpi_bus_get_status);
L
Linus Torvalds 已提交
124 125 126 127 128

/* --------------------------------------------------------------------------
                                 Power Management
   -------------------------------------------------------------------------- */

L
Len Brown 已提交
129
int acpi_bus_get_power(acpi_handle handle, int *state)
L
Linus Torvalds 已提交
130
{
L
Len Brown 已提交
131 132 133 134
	int result = 0;
	acpi_status status = 0;
	struct acpi_device *device = NULL;
	unsigned long psc = 0;
L
Linus Torvalds 已提交
135 136 137 138


	result = acpi_bus_get_device(handle, &device);
	if (result)
139
		return result;
L
Linus Torvalds 已提交
140 141 142 143 144 145 146 147 148

	*state = ACPI_STATE_UNKNOWN;

	if (!device->flags.power_manageable) {
		/* TBD: Non-recursive algorithm for walking up hierarchy */
		if (device->parent)
			*state = device->parent->power.state;
		else
			*state = ACPI_STATE_D0;
L
Len Brown 已提交
149
	} else {
L
Linus Torvalds 已提交
150
		/*
151
		 * Get the device's power state either directly (via _PSC) or
L
Linus Torvalds 已提交
152 153 154
		 * indirectly (via power resources).
		 */
		if (device->power.flags.explicit_get) {
L
Len Brown 已提交
155 156
			status = acpi_evaluate_integer(device->handle, "_PSC",
						       NULL, &psc);
L
Linus Torvalds 已提交
157
			if (ACPI_FAILURE(status))
158
				return -ENODEV;
L
Len Brown 已提交
159 160
			device->power.state = (int)psc;
		} else if (device->power.flags.power_resources) {
L
Linus Torvalds 已提交
161 162
			result = acpi_power_get_inferred_state(device);
			if (result)
163
				return result;
L
Linus Torvalds 已提交
164 165 166 167 168 169
		}

		*state = device->power.state;
	}

	ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] power state is D%d\n",
L
Len Brown 已提交
170
			  device->pnp.bus_id, device->power.state));
L
Linus Torvalds 已提交
171

172
	return 0;
L
Linus Torvalds 已提交
173 174
}

L
Len Brown 已提交
175
EXPORT_SYMBOL(acpi_bus_get_power);
L
Linus Torvalds 已提交
176

L
Len Brown 已提交
177
int acpi_bus_set_power(acpi_handle handle, int state)
L
Linus Torvalds 已提交
178
{
L
Len Brown 已提交
179 180 181 182
	int result = 0;
	acpi_status status = AE_OK;
	struct acpi_device *device = NULL;
	char object_name[5] = { '_', 'P', 'S', '0' + state, '\0' };
L
Linus Torvalds 已提交
183 184 185 186


	result = acpi_bus_get_device(handle, &device);
	if (result)
187
		return result;
L
Linus Torvalds 已提交
188 189

	if ((state < ACPI_STATE_D0) || (state > ACPI_STATE_D3))
190
		return -EINVAL;
L
Linus Torvalds 已提交
191 192 193 194

	/* Make sure this is a valid target state */

	if (!device->flags.power_manageable) {
195
		ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device `[%s]' is not power manageable\n",
196
				kobject_name(&device->dev.kobj)));
197
		return -ENODEV;
L
Linus Torvalds 已提交
198
	}
199
	/*
200
	 * Get device's current power state
201
	 */
202
	acpi_bus_get_power(device->handle, &device->power.state);
203
	if ((state == device->power.state) && !device->flags.force_power_state) {
204 205 206
		ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device is already at D%d\n",
				  state));
		return 0;
L
Linus Torvalds 已提交
207
	}
208

L
Linus Torvalds 已提交
209
	if (!device->power.states[state].flags.valid) {
210
		printk(KERN_WARNING PREFIX "Device does not support D%d\n", state);
211
		return -ENODEV;
L
Linus Torvalds 已提交
212 213
	}
	if (device->parent && (state < device->parent->power.state)) {
214
		printk(KERN_WARNING PREFIX
215
			      "Cannot set device to a higher-powered"
216
			      " state than parent\n");
217
		return -ENODEV;
L
Linus Torvalds 已提交
218 219 220 221 222 223 224 225
	}

	/*
	 * Transition Power
	 * ----------------
	 * On transitions to a high-powered state we first apply power (via
	 * power resources) then evalute _PSx.  Conversly for transitions to
	 * a lower-powered state.
226
	 */
L
Linus Torvalds 已提交
227 228 229 230 231 232 233
	if (state < device->power.state) {
		if (device->power.flags.power_resources) {
			result = acpi_power_transition(device, state);
			if (result)
				goto end;
		}
		if (device->power.states[state].flags.explicit_set) {
L
Len Brown 已提交
234 235
			status = acpi_evaluate_object(device->handle,
						      object_name, NULL, NULL);
L
Linus Torvalds 已提交
236 237 238 239 240
			if (ACPI_FAILURE(status)) {
				result = -ENODEV;
				goto end;
			}
		}
L
Len Brown 已提交
241
	} else {
L
Linus Torvalds 已提交
242
		if (device->power.states[state].flags.explicit_set) {
L
Len Brown 已提交
243 244
			status = acpi_evaluate_object(device->handle,
						      object_name, NULL, NULL);
L
Linus Torvalds 已提交
245 246 247 248 249 250 251 252 253 254 255 256
			if (ACPI_FAILURE(status)) {
				result = -ENODEV;
				goto end;
			}
		}
		if (device->power.flags.power_resources) {
			result = acpi_power_transition(device, state);
			if (result)
				goto end;
		}
	}

L
Len Brown 已提交
257
      end:
L
Linus Torvalds 已提交
258
	if (result)
259 260 261
		printk(KERN_WARNING PREFIX
			      "Transitioning device [%s] to D%d\n",
			      device->pnp.bus_id, state);
262 263
	else {
		device->power.state = state;
L
Len Brown 已提交
264 265 266
		ACPI_DEBUG_PRINT((ACPI_DB_INFO,
				  "Device [%s] transitioned to D%d\n",
				  device->pnp.bus_id, state));
267
	}
L
Linus Torvalds 已提交
268

269
	return result;
L
Linus Torvalds 已提交
270 271
}

L
Len Brown 已提交
272
EXPORT_SYMBOL(acpi_bus_set_power);
L
Linus Torvalds 已提交
273 274 275 276 277

/* --------------------------------------------------------------------------
                                Event Management
   -------------------------------------------------------------------------- */

278
#ifdef CONFIG_ACPI_PROC_EVENT
L
Linus Torvalds 已提交
279 280 281 282 283
static DEFINE_SPINLOCK(acpi_bus_event_lock);

LIST_HEAD(acpi_bus_event_list);
DECLARE_WAIT_QUEUE_HEAD(acpi_bus_event_queue);

L
Len Brown 已提交
284
extern int event_is_open;
L
Linus Torvalds 已提交
285

286
int acpi_bus_generate_proc_event4(const char *device_class, const char *bus_id, u8 type, int data)
L
Linus Torvalds 已提交
287
{
288
	struct acpi_bus_event *event;
L
Len Brown 已提交
289
	unsigned long flags = 0;
L
Linus Torvalds 已提交
290 291 292

	/* drop event on the floor if no one's listening */
	if (!event_is_open)
293
		return 0;
L
Linus Torvalds 已提交
294 295 296

	event = kmalloc(sizeof(struct acpi_bus_event), GFP_ATOMIC);
	if (!event)
297
		return -ENOMEM;
L
Linus Torvalds 已提交
298

299 300
	strcpy(event->device_class, device_class);
	strcpy(event->bus_id, bus_id);
L
Linus Torvalds 已提交
301 302 303 304 305 306 307 308 309
	event->type = type;
	event->data = data;

	spin_lock_irqsave(&acpi_bus_event_lock, flags);
	list_add_tail(&event->node, &acpi_bus_event_list);
	spin_unlock_irqrestore(&acpi_bus_event_lock, flags);

	wake_up_interruptible(&acpi_bus_event_queue);

310
	return 0;
311 312 313 314 315 316 317 318 319 320 321

}

EXPORT_SYMBOL_GPL(acpi_bus_generate_proc_event4);

int acpi_bus_generate_proc_event(struct acpi_device *device, u8 type, int data)
{
	if (!device)
		return -EINVAL;
	return acpi_bus_generate_proc_event4(device->pnp.device_class,
					     device->pnp.bus_id, type, data);
L
Linus Torvalds 已提交
322
}
L
Len Brown 已提交
323

324
EXPORT_SYMBOL(acpi_bus_generate_proc_event);
L
Linus Torvalds 已提交
325

L
Len Brown 已提交
326
int acpi_bus_receive_event(struct acpi_bus_event *event)
L
Linus Torvalds 已提交
327
{
L
Len Brown 已提交
328 329
	unsigned long flags = 0;
	struct acpi_bus_event *entry = NULL;
L
Linus Torvalds 已提交
330 331 332 333 334

	DECLARE_WAITQUEUE(wait, current);


	if (!event)
335
		return -EINVAL;
L
Linus Torvalds 已提交
336 337 338 339 340 341 342 343 344 345 346 347 348

	if (list_empty(&acpi_bus_event_list)) {

		set_current_state(TASK_INTERRUPTIBLE);
		add_wait_queue(&acpi_bus_event_queue, &wait);

		if (list_empty(&acpi_bus_event_list))
			schedule();

		remove_wait_queue(&acpi_bus_event_queue, &wait);
		set_current_state(TASK_RUNNING);

		if (signal_pending(current))
349
			return -ERESTARTSYS;
L
Linus Torvalds 已提交
350 351 352
	}

	spin_lock_irqsave(&acpi_bus_event_lock, flags);
L
Len Brown 已提交
353 354
	entry =
	    list_entry(acpi_bus_event_list.next, struct acpi_bus_event, node);
L
Linus Torvalds 已提交
355 356 357 358 359
	if (entry)
		list_del(&entry->node);
	spin_unlock_irqrestore(&acpi_bus_event_lock, flags);

	if (!entry)
360
		return -ENODEV;
L
Linus Torvalds 已提交
361 362 363 364 365

	memcpy(event, entry, sizeof(struct acpi_bus_event));

	kfree(entry);

366
	return 0;
L
Linus Torvalds 已提交
367 368
}

L
Len Brown 已提交
369
EXPORT_SYMBOL(acpi_bus_receive_event);
370
#endif	/* CONFIG_ACPI_PROC_EVENT */
L
Linus Torvalds 已提交
371 372 373 374 375 376

/* --------------------------------------------------------------------------
                             Notification Handling
   -------------------------------------------------------------------------- */

static int
L
Len Brown 已提交
377
acpi_bus_check_device(struct acpi_device *device, int *status_changed)
L
Linus Torvalds 已提交
378
{
L
Len Brown 已提交
379
	acpi_status status = 0;
L
Linus Torvalds 已提交
380 381 382 383
	struct acpi_device_status old_status;


	if (!device)
384
		return -EINVAL;
L
Linus Torvalds 已提交
385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400

	if (status_changed)
		*status_changed = 0;

	old_status = device->status;

	/*
	 * Make sure this device's parent is present before we go about
	 * messing with the device.
	 */
	if (device->parent && !device->parent->status.present) {
		device->status = device->parent->status;
		if (STRUCT_TO_INT(old_status) != STRUCT_TO_INT(device->status)) {
			if (status_changed)
				*status_changed = 1;
		}
401
		return 0;
L
Linus Torvalds 已提交
402 403 404 405
	}

	status = acpi_bus_get_status(device);
	if (ACPI_FAILURE(status))
406
		return -ENODEV;
L
Linus Torvalds 已提交
407 408

	if (STRUCT_TO_INT(old_status) == STRUCT_TO_INT(device->status))
409
		return 0;
L
Linus Torvalds 已提交
410 411 412

	if (status_changed)
		*status_changed = 1;
L
Len Brown 已提交
413

L
Linus Torvalds 已提交
414 415 416 417 418 419
	/*
	 * Device Insertion/Removal
	 */
	if ((device->status.present) && !(old_status.present)) {
		ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device insertion detected\n"));
		/* TBD: Handle device insertion */
L
Len Brown 已提交
420
	} else if (!(device->status.present) && (old_status.present)) {
L
Linus Torvalds 已提交
421 422 423 424
		ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device removal detected\n"));
		/* TBD: Handle device removal */
	}

425
	return 0;
L
Linus Torvalds 已提交
426 427
}

L
Len Brown 已提交
428
static int acpi_bus_check_scope(struct acpi_device *device)
L
Linus Torvalds 已提交
429
{
L
Len Brown 已提交
430 431
	int result = 0;
	int status_changed = 0;
L
Linus Torvalds 已提交
432 433 434


	if (!device)
435
		return -EINVAL;
L
Linus Torvalds 已提交
436 437 438 439

	/* Status Change? */
	result = acpi_bus_check_device(device, &status_changed);
	if (result)
440
		return result;
L
Linus Torvalds 已提交
441 442

	if (!status_changed)
443
		return 0;
L
Linus Torvalds 已提交
444 445 446 447 448 449

	/*
	 * TBD: Enumerate child devices within this device's scope and
	 *       run acpi_bus_check_device()'s on them.
	 */

450
	return 0;
L
Linus Torvalds 已提交
451 452 453 454 455 456 457
}

/**
 * acpi_bus_notify
 * ---------------
 * Callback for all 'system-level' device notifications (values 0x00-0x7F).
 */
L
Len Brown 已提交
458
static void acpi_bus_notify(acpi_handle handle, u32 type, void *data)
L
Linus Torvalds 已提交
459
{
L
Len Brown 已提交
460 461
	int result = 0;
	struct acpi_device *device = NULL;
L
Linus Torvalds 已提交
462 463 464


	if (acpi_bus_get_device(handle, &device))
465
		return;
L
Linus Torvalds 已提交
466 467 468 469

	switch (type) {

	case ACPI_NOTIFY_BUS_CHECK:
L
Len Brown 已提交
470 471 472
		ACPI_DEBUG_PRINT((ACPI_DB_INFO,
				  "Received BUS CHECK notification for device [%s]\n",
				  device->pnp.bus_id));
L
Linus Torvalds 已提交
473
		result = acpi_bus_check_scope(device);
474
		/*
L
Linus Torvalds 已提交
475
		 * TBD: We'll need to outsource certain events to non-ACPI
L
Len Brown 已提交
476
		 *      drivers via the device manager (device.c).
L
Linus Torvalds 已提交
477 478 479 480
		 */
		break;

	case ACPI_NOTIFY_DEVICE_CHECK:
L
Len Brown 已提交
481 482 483
		ACPI_DEBUG_PRINT((ACPI_DB_INFO,
				  "Received DEVICE CHECK notification for device [%s]\n",
				  device->pnp.bus_id));
L
Linus Torvalds 已提交
484
		result = acpi_bus_check_device(device, NULL);
485
		/*
L
Linus Torvalds 已提交
486
		 * TBD: We'll need to outsource certain events to non-ACPI
L
Len Brown 已提交
487
		 *      drivers via the device manager (device.c).
L
Linus Torvalds 已提交
488 489 490 491
		 */
		break;

	case ACPI_NOTIFY_DEVICE_WAKE:
L
Len Brown 已提交
492 493 494
		ACPI_DEBUG_PRINT((ACPI_DB_INFO,
				  "Received DEVICE WAKE notification for device [%s]\n",
				  device->pnp.bus_id));
L
Linus Torvalds 已提交
495 496 497 498
		/* TBD */
		break;

	case ACPI_NOTIFY_EJECT_REQUEST:
L
Len Brown 已提交
499 500 501
		ACPI_DEBUG_PRINT((ACPI_DB_INFO,
				  "Received EJECT REQUEST notification for device [%s]\n",
				  device->pnp.bus_id));
L
Linus Torvalds 已提交
502 503 504 505
		/* TBD */
		break;

	case ACPI_NOTIFY_DEVICE_CHECK_LIGHT:
L
Len Brown 已提交
506 507 508
		ACPI_DEBUG_PRINT((ACPI_DB_INFO,
				  "Received DEVICE CHECK LIGHT notification for device [%s]\n",
				  device->pnp.bus_id));
L
Linus Torvalds 已提交
509 510 511 512
		/* TBD: Exactly what does 'light' mean? */
		break;

	case ACPI_NOTIFY_FREQUENCY_MISMATCH:
L
Len Brown 已提交
513 514 515
		ACPI_DEBUG_PRINT((ACPI_DB_INFO,
				  "Received FREQUENCY MISMATCH notification for device [%s]\n",
				  device->pnp.bus_id));
L
Linus Torvalds 已提交
516 517 518 519
		/* TBD */
		break;

	case ACPI_NOTIFY_BUS_MODE_MISMATCH:
L
Len Brown 已提交
520 521 522
		ACPI_DEBUG_PRINT((ACPI_DB_INFO,
				  "Received BUS MODE MISMATCH notification for device [%s]\n",
				  device->pnp.bus_id));
L
Linus Torvalds 已提交
523 524 525 526
		/* TBD */
		break;

	case ACPI_NOTIFY_POWER_FAULT:
L
Len Brown 已提交
527 528 529
		ACPI_DEBUG_PRINT((ACPI_DB_INFO,
				  "Received POWER FAULT notification for device [%s]\n",
				  device->pnp.bus_id));
L
Linus Torvalds 已提交
530 531 532 533
		/* TBD */
		break;

	default:
L
Len Brown 已提交
534 535 536
		ACPI_DEBUG_PRINT((ACPI_DB_INFO,
				  "Received unknown/unsupported notification [%08x]\n",
				  type));
L
Linus Torvalds 已提交
537 538 539
		break;
	}

540
	return;
L
Linus Torvalds 已提交
541 542 543 544 545 546
}

/* --------------------------------------------------------------------------
                             Initialization/Cleanup
   -------------------------------------------------------------------------- */

L
Len Brown 已提交
547
static int __init acpi_bus_init_irq(void)
L
Linus Torvalds 已提交
548
{
L
Len Brown 已提交
549 550 551 552
	acpi_status status = AE_OK;
	union acpi_object arg = { ACPI_TYPE_INTEGER };
	struct acpi_object_list arg_list = { 1, &arg };
	char *message = NULL;
L
Linus Torvalds 已提交
553 554


555
	/*
L
Linus Torvalds 已提交
556 557 558 559 560 561 562 563 564 565 566 567 568 569
	 * Let the system know what interrupt model we are using by
	 * evaluating the \_PIC object, if exists.
	 */

	switch (acpi_irq_model) {
	case ACPI_IRQ_MODEL_PIC:
		message = "PIC";
		break;
	case ACPI_IRQ_MODEL_IOAPIC:
		message = "IOAPIC";
		break;
	case ACPI_IRQ_MODEL_IOSAPIC:
		message = "IOSAPIC";
		break;
J
John Keller 已提交
570 571 572
	case ACPI_IRQ_MODEL_PLATFORM:
		message = "platform specific model";
		break;
L
Linus Torvalds 已提交
573 574
	default:
		printk(KERN_WARNING PREFIX "Unknown interrupt routing model\n");
575
		return -ENODEV;
L
Linus Torvalds 已提交
576 577 578 579 580 581 582 583
	}

	printk(KERN_INFO PREFIX "Using %s for interrupt routing\n", message);

	arg.integer.value = acpi_irq_model;

	status = acpi_evaluate_object(NULL, "\\_PIC", &arg_list, NULL);
	if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) {
584
		ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PIC"));
585
		return -ENODEV;
L
Linus Torvalds 已提交
586 587
	}

588
	return 0;
L
Linus Torvalds 已提交
589 590
}

591 592 593
acpi_native_uint acpi_gbl_permanent_mmap;


L
Len Brown 已提交
594
void __init acpi_early_init(void)
L
Linus Torvalds 已提交
595
{
L
Len Brown 已提交
596
	acpi_status status = AE_OK;
L
Linus Torvalds 已提交
597 598

	if (acpi_disabled)
599
		return;
L
Linus Torvalds 已提交
600

B
Bob Moore 已提交
601 602
	printk(KERN_INFO PREFIX "Core revision %08x\n", ACPI_CA_VERSION);

L
Linus Torvalds 已提交
603 604 605 606
	/* enable workarounds, unless strict ACPI spec. compliance */
	if (!acpi_strict)
		acpi_gbl_enable_interpreter_slack = TRUE;

607 608 609 610 611 612 613 614 615
	acpi_gbl_permanent_mmap = 1;

	status = acpi_reallocate_root_table();
	if (ACPI_FAILURE(status)) {
		printk(KERN_ERR PREFIX
		       "Unable to reallocate ACPI tables\n");
		goto error0;
	}

L
Linus Torvalds 已提交
616 617
	status = acpi_initialize_subsystem();
	if (ACPI_FAILURE(status)) {
L
Len Brown 已提交
618 619
		printk(KERN_ERR PREFIX
		       "Unable to initialize the ACPI Interpreter\n");
L
Linus Torvalds 已提交
620 621 622 623 624
		goto error0;
	}

	status = acpi_load_tables();
	if (ACPI_FAILURE(status)) {
L
Len Brown 已提交
625 626
		printk(KERN_ERR PREFIX
		       "Unable to load the System Description Tables\n");
L
Linus Torvalds 已提交
627 628 629 630 631
		goto error0;
	}

#ifdef CONFIG_X86
	if (!acpi_ioapic) {
632
		extern u8 acpi_sci_flags;
L
Linus Torvalds 已提交
633 634

		/* compatible (0) means level (3) */
635 636 637 638
		if (!(acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)) {
			acpi_sci_flags &= ~ACPI_MADT_TRIGGER_MASK;
			acpi_sci_flags |= ACPI_MADT_TRIGGER_LEVEL;
		}
L
Linus Torvalds 已提交
639
		/* Set PIC-mode SCI trigger type */
640
		acpi_pic_sci_set_trigger(acpi_gbl_FADT.sci_interrupt,
641
					 (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2);
L
Linus Torvalds 已提交
642 643 644
	} else {
		extern int acpi_sci_override_gsi;
		/*
645
		 * now that acpi_gbl_FADT is initialized,
L
Linus Torvalds 已提交
646 647
		 * update it with result from INT_SRC_OVR parsing
		 */
648
		acpi_gbl_FADT.sci_interrupt = acpi_sci_override_gsi;
L
Linus Torvalds 已提交
649 650 651
	}
#endif

L
Len Brown 已提交
652 653 654 655
	status =
	    acpi_enable_subsystem(~
				  (ACPI_NO_HARDWARE_INIT |
				   ACPI_NO_ACPI_ENABLE));
L
Linus Torvalds 已提交
656 657 658 659 660
	if (ACPI_FAILURE(status)) {
		printk(KERN_ERR PREFIX "Unable to enable ACPI\n");
		goto error0;
	}

661
	return;
L
Linus Torvalds 已提交
662

L
Len Brown 已提交
663
      error0:
L
Linus Torvalds 已提交
664
	disable_acpi();
665
	return;
L
Linus Torvalds 已提交
666 667
}

L
Len Brown 已提交
668
static int __init acpi_bus_init(void)
L
Linus Torvalds 已提交
669
{
L
Len Brown 已提交
670 671 672
	int result = 0;
	acpi_status status = AE_OK;
	extern acpi_status acpi_os_initialize1(void);
L
Linus Torvalds 已提交
673 674 675 676


	status = acpi_os_initialize1();

L
Len Brown 已提交
677 678
	status =
	    acpi_enable_subsystem(ACPI_NO_HARDWARE_INIT | ACPI_NO_ACPI_ENABLE);
L
Linus Torvalds 已提交
679
	if (ACPI_FAILURE(status)) {
L
Len Brown 已提交
680 681
		printk(KERN_ERR PREFIX
		       "Unable to start the ACPI Interpreter\n");
L
Linus Torvalds 已提交
682 683 684 685
		goto error1;
	}

	if (ACPI_FAILURE(status)) {
L
Len Brown 已提交
686 687
		printk(KERN_ERR PREFIX
		       "Unable to initialize ACPI OS objects\n");
L
Linus Torvalds 已提交
688 689 690 691 692 693 694 695
		goto error1;
	}
#ifdef CONFIG_ACPI_EC
	/*
	 * ACPI 2.0 requires the EC driver to be loaded and work before
	 * the EC device is found in the namespace (i.e. before acpi_initialize_objects()
	 * is called).
	 *
696
	 * This is accomplished by looking for the ECDT table, and getting
L
Linus Torvalds 已提交
697 698 699 700 701 702 703 704 705 706 707 708 709 710
	 * the EC parameters out of that.
	 */
	status = acpi_ec_ecdt_probe();
	/* Ignore result. Not having an ECDT is not fatal. */
#endif

	status = acpi_initialize_objects(ACPI_FULL_INITIALIZATION);
	if (ACPI_FAILURE(status)) {
		printk(KERN_ERR PREFIX "Unable to initialize ACPI objects\n");
		goto error1;
	}

	printk(KERN_INFO PREFIX "Interpreter enabled\n");

711 712 713
	/* Initialize sleep structures */
	acpi_sleep_init();

L
Linus Torvalds 已提交
714 715 716 717 718 719 720 721 722 723
	/*
	 * Get the system interrupt model and evaluate \_PIC.
	 */
	result = acpi_bus_init_irq();
	if (result)
		goto error1;

	/*
	 * Register the for all standard device notifications.
	 */
L
Len Brown 已提交
724 725 726
	status =
	    acpi_install_notify_handler(ACPI_ROOT_OBJECT, ACPI_SYSTEM_NOTIFY,
					&acpi_bus_notify, NULL);
L
Linus Torvalds 已提交
727
	if (ACPI_FAILURE(status)) {
L
Len Brown 已提交
728 729
		printk(KERN_ERR PREFIX
		       "Unable to register for device notifications\n");
L
Linus Torvalds 已提交
730 731 732 733 734 735 736 737
		goto error1;
	}

	/*
	 * Create the top ACPI proc directory
	 */
	acpi_root_dir = proc_mkdir(ACPI_BUS_FILE_ROOT, NULL);

738
	return 0;
L
Linus Torvalds 已提交
739 740

	/* Mimic structured exception handling */
L
Len Brown 已提交
741
      error1:
L
Linus Torvalds 已提交
742
	acpi_terminate();
743
	return -ENODEV;
L
Linus Torvalds 已提交
744 745
}

746
struct kobject *acpi_kobj;
L
Linus Torvalds 已提交
747

L
Len Brown 已提交
748
static int __init acpi_init(void)
L
Linus Torvalds 已提交
749
{
L
Len Brown 已提交
750
	int result = 0;
L
Linus Torvalds 已提交
751 752 753 754


	if (acpi_disabled) {
		printk(KERN_INFO PREFIX "Interpreter disabled.\n");
755
		return -ENODEV;
L
Linus Torvalds 已提交
756 757
	}

758 759 760 761 762
	acpi_kobj = kobject_create_and_add("acpi", &firmware_kset->kobj);
	if (!acpi_kobj) {
		printk(KERN_WARNING "%s: kset create error\n", __FUNCTION__);
		acpi_kobj = NULL;
	}
L
Linus Torvalds 已提交
763 764 765 766

	result = acpi_bus_init();

	if (!result) {
767 768
		if (!(pm_flags & PM_APM))
			pm_flags |= PM_ACPI;
L
Linus Torvalds 已提交
769
		else {
L
Len Brown 已提交
770 771
			printk(KERN_INFO PREFIX
			       "APM is already active, exiting\n");
L
Linus Torvalds 已提交
772 773 774 775 776 777
			disable_acpi();
			result = -ENODEV;
		}
	} else
		disable_acpi();

778
	return result;
L
Linus Torvalds 已提交
779 780 781
}

subsys_initcall(acpi_init);