2 * acpi_bus.c - ACPI Bus Driver ($Revision: 80 $)
4 * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
6 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or (at
11 * your option) any later version.
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.
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.
22 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
25 #include <linux/module.h>
26 #include <linux/init.h>
27 #include <linux/ioport.h>
28 #include <linux/kernel.h>
29 #include <linux/list.h>
30 #include <linux/sched.h>
32 #include <linux/device.h>
33 #include <linux/proc_fs.h>
34 #include <linux/acpi.h>
35 #include <linux/slab.h>
37 #include <asm/mpspec.h>
39 #include <linux/pci.h>
40 #include <acpi/acpi_bus.h>
41 #include <acpi/acpi_drivers.h>
42 #include <acpi/apei.h>
43 #include <linux/dmi.h>
44 #include <linux/suspend.h>
48 #define _COMPONENT ACPI_BUS_COMPONENT
49 ACPI_MODULE_NAME("bus");
51 struct acpi_device *acpi_root;
52 struct proc_dir_entry *acpi_root_dir;
53 EXPORT_SYMBOL(acpi_root_dir);
55 #define STRUCT_TO_INT(s) (*((int*)&s))
59 static int set_copy_dsdt(const struct dmi_system_id *id)
61 printk(KERN_NOTICE "%s detected - "
62 "force copy of DSDT to local memory\n", id->ident);
63 acpi_gbl_copy_dsdt_locally = 1;
67 static struct dmi_system_id dsdt_dmi_table[] __initdata = {
69 * Invoke DSDT corruption work-around on all Toshiba Satellite.
70 * https://bugzilla.kernel.org/show_bug.cgi?id=14679
73 .callback = set_copy_dsdt,
74 .ident = "TOSHIBA Satellite",
76 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
77 DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"),
83 static struct dmi_system_id dsdt_dmi_table[] __initdata = {
88 /* --------------------------------------------------------------------------
90 -------------------------------------------------------------------------- */
92 acpi_status acpi_bus_get_status_handle(acpi_handle handle,
93 unsigned long long *sta)
97 status = acpi_evaluate_integer(handle, "_STA", NULL, sta);
98 if (ACPI_SUCCESS(status))
101 if (status == AE_NOT_FOUND) {
102 *sta = ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED |
103 ACPI_STA_DEVICE_UI | ACPI_STA_DEVICE_FUNCTIONING;
109 int acpi_bus_get_status(struct acpi_device *device)
112 unsigned long long sta;
114 status = acpi_bus_get_status_handle(device->handle, &sta);
115 if (ACPI_FAILURE(status))
118 STRUCT_TO_INT(device->status) = (int) sta;
120 if (device->status.functional && !device->status.present) {
121 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]: "
122 "functional but not present;\n",
124 (u32) STRUCT_TO_INT(device->status)));
127 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]\n",
129 (u32) STRUCT_TO_INT(device->status)));
132 EXPORT_SYMBOL(acpi_bus_get_status);
134 void acpi_bus_private_data_handler(acpi_handle handle,
139 EXPORT_SYMBOL(acpi_bus_private_data_handler);
141 int acpi_bus_get_private_data(acpi_handle handle, void **data)
148 status = acpi_get_data(handle, acpi_bus_private_data_handler, data);
149 if (ACPI_FAILURE(status) || !*data) {
150 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No context for object [%p]\n",
157 EXPORT_SYMBOL(acpi_bus_get_private_data);
159 static void acpi_print_osc_error(acpi_handle handle,
160 struct acpi_osc_context *context, char *error)
162 struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER};
165 if (ACPI_FAILURE(acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer)))
166 printk(KERN_DEBUG "%s\n", error);
168 printk(KERN_DEBUG "%s:%s\n", (char *)buffer.pointer, error);
169 kfree(buffer.pointer);
171 printk(KERN_DEBUG"_OSC request data:");
172 for (i = 0; i < context->cap.length; i += sizeof(u32))
173 printk("%x ", *((u32 *)(context->cap.pointer + i)));
177 static acpi_status acpi_str_to_uuid(char *str, u8 *uuid)
180 static int opc_map_to_uuid[16] = {6, 4, 2, 0, 11, 9, 16, 14, 19, 21,
181 24, 26, 28, 30, 32, 34};
183 if (strlen(str) != 36)
184 return AE_BAD_PARAMETER;
185 for (i = 0; i < 36; i++) {
186 if (i == 8 || i == 13 || i == 18 || i == 23) {
188 return AE_BAD_PARAMETER;
189 } else if (!isxdigit(str[i]))
190 return AE_BAD_PARAMETER;
192 for (i = 0; i < 16; i++) {
193 uuid[i] = hex_to_bin(str[opc_map_to_uuid[i]]) << 4;
194 uuid[i] |= hex_to_bin(str[opc_map_to_uuid[i] + 1]);
199 acpi_status acpi_run_osc(acpi_handle handle, struct acpi_osc_context *context)
202 struct acpi_object_list input;
203 union acpi_object in_params[4];
204 union acpi_object *out_obj;
207 struct acpi_buffer output = {ACPI_ALLOCATE_BUFFER, NULL};
211 if (ACPI_FAILURE(acpi_str_to_uuid(context->uuid_str, uuid)))
213 context->ret.length = ACPI_ALLOCATE_BUFFER;
214 context->ret.pointer = NULL;
216 /* Setting up input parameters */
218 input.pointer = in_params;
219 in_params[0].type = ACPI_TYPE_BUFFER;
220 in_params[0].buffer.length = 16;
221 in_params[0].buffer.pointer = uuid;
222 in_params[1].type = ACPI_TYPE_INTEGER;
223 in_params[1].integer.value = context->rev;
224 in_params[2].type = ACPI_TYPE_INTEGER;
225 in_params[2].integer.value = context->cap.length/sizeof(u32);
226 in_params[3].type = ACPI_TYPE_BUFFER;
227 in_params[3].buffer.length = context->cap.length;
228 in_params[3].buffer.pointer = context->cap.pointer;
230 status = acpi_evaluate_object(handle, "_OSC", &input, &output);
231 if (ACPI_FAILURE(status))
235 return AE_NULL_OBJECT;
237 out_obj = output.pointer;
238 if (out_obj->type != ACPI_TYPE_BUFFER
239 || out_obj->buffer.length != context->cap.length) {
240 acpi_print_osc_error(handle, context,
241 "_OSC evaluation returned wrong type");
245 /* Need to ignore the bit0 in result code */
246 errors = *((u32 *)out_obj->buffer.pointer) & ~(1 << 0);
248 if (errors & OSC_REQUEST_ERROR)
249 acpi_print_osc_error(handle, context,
250 "_OSC request failed");
251 if (errors & OSC_INVALID_UUID_ERROR)
252 acpi_print_osc_error(handle, context,
253 "_OSC invalid UUID");
254 if (errors & OSC_INVALID_REVISION_ERROR)
255 acpi_print_osc_error(handle, context,
256 "_OSC invalid revision");
257 if (errors & OSC_CAPABILITIES_MASK_ERROR) {
258 if (((u32 *)context->cap.pointer)[OSC_QUERY_TYPE]
268 context->ret.length = out_obj->buffer.length;
269 context->ret.pointer = kmemdup(out_obj->buffer.pointer,
270 context->ret.length, GFP_KERNEL);
271 if (!context->ret.pointer) {
272 status = AE_NO_MEMORY;
278 kfree(output.pointer);
280 context->ret.pointer = NULL;
283 EXPORT_SYMBOL(acpi_run_osc);
285 bool osc_sb_apei_support_acked;
286 static u8 sb_uuid_str[] = "0811B06E-4A27-44F9-8D60-3CBBC22E7B48";
287 static void acpi_bus_osc_support(void)
290 struct acpi_osc_context context = {
291 .uuid_str = sb_uuid_str,
294 .cap.pointer = capbuf,
298 capbuf[OSC_QUERY_TYPE] = OSC_QUERY_ENABLE;
299 capbuf[OSC_SUPPORT_TYPE] = OSC_SB_PR3_SUPPORT; /* _PR3 is in use */
300 #if defined(CONFIG_ACPI_PROCESSOR_AGGREGATOR) ||\
301 defined(CONFIG_ACPI_PROCESSOR_AGGREGATOR_MODULE)
302 capbuf[OSC_SUPPORT_TYPE] |= OSC_SB_PAD_SUPPORT;
305 #if defined(CONFIG_ACPI_PROCESSOR) || defined(CONFIG_ACPI_PROCESSOR_MODULE)
306 capbuf[OSC_SUPPORT_TYPE] |= OSC_SB_PPC_OST_SUPPORT;
309 #ifdef ACPI_HOTPLUG_OST
310 capbuf[OSC_SUPPORT_TYPE] |= OSC_SB_HOTPLUG_OST_SUPPORT;
314 capbuf[OSC_SUPPORT_TYPE] |= OSC_SB_APEI_SUPPORT;
315 if (ACPI_FAILURE(acpi_get_handle(NULL, "\\_SB", &handle)))
317 if (ACPI_SUCCESS(acpi_run_osc(handle, &context))) {
318 u32 *capbuf_ret = context.ret.pointer;
319 if (context.ret.length > OSC_SUPPORT_TYPE)
320 osc_sb_apei_support_acked =
321 capbuf_ret[OSC_SUPPORT_TYPE] & OSC_SB_APEI_SUPPORT;
322 kfree(context.ret.pointer);
324 /* do we need to check other returned cap? Sounds no */
327 /* --------------------------------------------------------------------------
328 Notification Handling
329 -------------------------------------------------------------------------- */
331 static void acpi_bus_check_device(acpi_handle handle)
333 struct acpi_device *device;
335 struct acpi_device_status old_status;
337 if (acpi_bus_get_device(handle, &device))
342 old_status = device->status;
345 * Make sure this device's parent is present before we go about
346 * messing with the device.
348 if (device->parent && !device->parent->status.present) {
349 device->status = device->parent->status;
353 status = acpi_bus_get_status(device);
354 if (ACPI_FAILURE(status))
357 if (STRUCT_TO_INT(old_status) == STRUCT_TO_INT(device->status))
361 * Device Insertion/Removal
363 if ((device->status.present) && !(old_status.present)) {
364 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device insertion detected\n"));
365 /* TBD: Handle device insertion */
366 } else if (!(device->status.present) && (old_status.present)) {
367 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device removal detected\n"));
368 /* TBD: Handle device removal */
372 static void acpi_bus_check_scope(acpi_handle handle)
375 acpi_bus_check_device(handle);
378 * TBD: Enumerate child devices within this device's scope and
379 * run acpi_bus_check_device()'s on them.
383 static BLOCKING_NOTIFIER_HEAD(acpi_bus_notify_list);
384 int register_acpi_bus_notifier(struct notifier_block *nb)
386 return blocking_notifier_chain_register(&acpi_bus_notify_list, nb);
388 EXPORT_SYMBOL_GPL(register_acpi_bus_notifier);
390 void unregister_acpi_bus_notifier(struct notifier_block *nb)
392 blocking_notifier_chain_unregister(&acpi_bus_notify_list, nb);
394 EXPORT_SYMBOL_GPL(unregister_acpi_bus_notifier);
399 * Callback for all 'system-level' device notifications (values 0x00-0x7F).
401 static void acpi_bus_notify(acpi_handle handle, u32 type, void *data)
403 struct acpi_device *device = NULL;
404 struct acpi_driver *driver;
406 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Notification %#02x to handle %p\n",
409 blocking_notifier_call_chain(&acpi_bus_notify_list,
410 type, (void *)handle);
414 case ACPI_NOTIFY_BUS_CHECK:
415 acpi_bus_check_scope(handle);
417 * TBD: We'll need to outsource certain events to non-ACPI
418 * drivers via the device manager (device.c).
422 case ACPI_NOTIFY_DEVICE_CHECK:
423 acpi_bus_check_device(handle);
425 * TBD: We'll need to outsource certain events to non-ACPI
426 * drivers via the device manager (device.c).
430 case ACPI_NOTIFY_DEVICE_WAKE:
434 case ACPI_NOTIFY_EJECT_REQUEST:
438 case ACPI_NOTIFY_DEVICE_CHECK_LIGHT:
439 /* TBD: Exactly what does 'light' mean? */
442 case ACPI_NOTIFY_FREQUENCY_MISMATCH:
446 case ACPI_NOTIFY_BUS_MODE_MISMATCH:
450 case ACPI_NOTIFY_POWER_FAULT:
455 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
456 "Received unknown/unsupported notification [%08x]\n",
461 acpi_bus_get_device(handle, &device);
463 driver = device->driver;
464 if (driver && driver->ops.notify &&
465 (driver->flags & ACPI_DRIVER_ALL_NOTIFY_EVENTS))
466 driver->ops.notify(device, type);
470 /* --------------------------------------------------------------------------
471 Initialization/Cleanup
472 -------------------------------------------------------------------------- */
474 static int __init acpi_bus_init_irq(void)
477 union acpi_object arg = { ACPI_TYPE_INTEGER };
478 struct acpi_object_list arg_list = { 1, &arg };
479 char *message = NULL;
483 * Let the system know what interrupt model we are using by
484 * evaluating the \_PIC object, if exists.
487 switch (acpi_irq_model) {
488 case ACPI_IRQ_MODEL_PIC:
491 case ACPI_IRQ_MODEL_IOAPIC:
494 case ACPI_IRQ_MODEL_IOSAPIC:
497 case ACPI_IRQ_MODEL_PLATFORM:
498 message = "platform specific model";
501 printk(KERN_WARNING PREFIX "Unknown interrupt routing model\n");
505 printk(KERN_INFO PREFIX "Using %s for interrupt routing\n", message);
507 arg.integer.value = acpi_irq_model;
509 status = acpi_evaluate_object(NULL, "\\_PIC", &arg_list, NULL);
510 if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) {
511 ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PIC"));
518 u8 acpi_gbl_permanent_mmap;
521 void __init acpi_early_init(void)
528 printk(KERN_INFO PREFIX "Core revision %08x\n", ACPI_CA_VERSION);
530 /* enable workarounds, unless strict ACPI spec. compliance */
532 acpi_gbl_enable_interpreter_slack = TRUE;
534 acpi_gbl_permanent_mmap = 1;
537 * If the machine falls into the DMI check table,
538 * DSDT will be copied to memory
540 dmi_check_system(dsdt_dmi_table);
542 status = acpi_reallocate_root_table();
543 if (ACPI_FAILURE(status)) {
544 printk(KERN_ERR PREFIX
545 "Unable to reallocate ACPI tables\n");
549 status = acpi_initialize_subsystem();
550 if (ACPI_FAILURE(status)) {
551 printk(KERN_ERR PREFIX
552 "Unable to initialize the ACPI Interpreter\n");
556 status = acpi_load_tables();
557 if (ACPI_FAILURE(status)) {
558 printk(KERN_ERR PREFIX
559 "Unable to load the System Description Tables\n");
565 /* compatible (0) means level (3) */
566 if (!(acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)) {
567 acpi_sci_flags &= ~ACPI_MADT_TRIGGER_MASK;
568 acpi_sci_flags |= ACPI_MADT_TRIGGER_LEVEL;
570 /* Set PIC-mode SCI trigger type */
571 acpi_pic_sci_set_trigger(acpi_gbl_FADT.sci_interrupt,
572 (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2);
575 * now that acpi_gbl_FADT is initialized,
576 * update it with result from INT_SRC_OVR parsing
578 acpi_gbl_FADT.sci_interrupt = acpi_sci_override_gsi;
582 status = acpi_enable_subsystem(~ACPI_NO_ACPI_ENABLE);
583 if (ACPI_FAILURE(status)) {
584 printk(KERN_ERR PREFIX "Unable to enable ACPI\n");
595 static int __init acpi_bus_init(void)
600 acpi_os_initialize1();
602 status = acpi_enable_subsystem(ACPI_NO_ACPI_ENABLE);
603 if (ACPI_FAILURE(status)) {
604 printk(KERN_ERR PREFIX
605 "Unable to start the ACPI Interpreter\n");
610 * ACPI 2.0 requires the EC driver to be loaded and work before
611 * the EC device is found in the namespace (i.e. before acpi_initialize_objects()
614 * This is accomplished by looking for the ECDT table, and getting
615 * the EC parameters out of that.
617 status = acpi_ec_ecdt_probe();
618 /* Ignore result. Not having an ECDT is not fatal. */
620 status = acpi_initialize_objects(ACPI_FULL_INITIALIZATION);
621 if (ACPI_FAILURE(status)) {
622 printk(KERN_ERR PREFIX "Unable to initialize ACPI objects\n");
627 * _OSC method may exist in module level code,
628 * so it must be run after ACPI_FULL_INITIALIZATION
630 acpi_bus_osc_support();
633 * _PDC control method may load dynamic SSDT tables,
634 * and we need to install the table handler before that.
638 acpi_early_processor_set_pdc();
641 * Maybe EC region is required at bus_scan/acpi_get_devices. So it
642 * is necessary to enable it as early as possible.
644 acpi_boot_ec_enable();
646 printk(KERN_INFO PREFIX "Interpreter enabled\n");
648 /* Initialize sleep structures */
652 * Get the system interrupt model and evaluate \_PIC.
654 result = acpi_bus_init_irq();
659 * Register the for all standard device notifications.
662 acpi_install_notify_handler(ACPI_ROOT_OBJECT, ACPI_SYSTEM_NOTIFY,
663 &acpi_bus_notify, NULL);
664 if (ACPI_FAILURE(status)) {
665 printk(KERN_ERR PREFIX
666 "Unable to register for device notifications\n");
671 * Create the top ACPI proc directory
673 acpi_root_dir = proc_mkdir(ACPI_BUS_FILE_ROOT, NULL);
677 /* Mimic structured exception handling */
683 struct kobject *acpi_kobj;
684 EXPORT_SYMBOL_GPL(acpi_kobj);
686 static int __init acpi_init(void)
691 printk(KERN_INFO PREFIX "Interpreter disabled.\n");
695 acpi_kobj = kobject_create_and_add("acpi", firmware_kobj);
697 printk(KERN_WARNING "%s: kset create error\n", __func__);
701 init_acpi_device_notify();
702 result = acpi_bus_init();
708 pci_mmcfg_late_init();
712 acpi_sleep_proc_init();
713 acpi_wakeup_device_init();
717 subsys_initcall(acpi_init);