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>
36 #include <linux/regulator/machine.h>
38 #include <asm/mpspec.h>
40 #include <linux/pci.h>
41 #include <acpi/apei.h>
42 #include <linux/dmi.h>
43 #include <linux/suspend.h>
47 #define _COMPONENT ACPI_BUS_COMPONENT
48 ACPI_MODULE_NAME("bus");
50 struct acpi_device *acpi_root;
51 struct proc_dir_entry *acpi_root_dir;
52 EXPORT_SYMBOL(acpi_root_dir);
55 static int set_copy_dsdt(const struct dmi_system_id *id)
57 printk(KERN_NOTICE "%s detected - "
58 "force copy of DSDT to local memory\n", id->ident);
59 acpi_gbl_copy_dsdt_locally = 1;
63 static struct dmi_system_id dsdt_dmi_table[] __initdata = {
65 * Invoke DSDT corruption work-around on all Toshiba Satellite.
66 * https://bugzilla.kernel.org/show_bug.cgi?id=14679
69 .callback = set_copy_dsdt,
70 .ident = "TOSHIBA Satellite",
72 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
73 DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"),
79 static struct dmi_system_id dsdt_dmi_table[] __initdata = {
84 /* --------------------------------------------------------------------------
86 -------------------------------------------------------------------------- */
88 acpi_status acpi_bus_get_status_handle(acpi_handle handle,
89 unsigned long long *sta)
93 status = acpi_evaluate_integer(handle, "_STA", NULL, sta);
94 if (ACPI_SUCCESS(status))
97 if (status == AE_NOT_FOUND) {
98 *sta = ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED |
99 ACPI_STA_DEVICE_UI | ACPI_STA_DEVICE_FUNCTIONING;
105 int acpi_bus_get_status(struct acpi_device *device)
108 unsigned long long sta;
110 status = acpi_bus_get_status_handle(device->handle, &sta);
111 if (ACPI_FAILURE(status))
114 acpi_set_device_status(device, sta);
116 if (device->status.functional && !device->status.present) {
117 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]: "
118 "functional but not present;\n",
119 device->pnp.bus_id, (u32)sta));
122 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]\n",
123 device->pnp.bus_id, (u32)sta));
126 EXPORT_SYMBOL(acpi_bus_get_status);
128 void acpi_bus_private_data_handler(acpi_handle handle,
133 EXPORT_SYMBOL(acpi_bus_private_data_handler);
135 int acpi_bus_get_private_data(acpi_handle handle, void **data)
142 status = acpi_get_data(handle, acpi_bus_private_data_handler, data);
143 if (ACPI_FAILURE(status) || !*data) {
144 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No context for object [%p]\n",
151 EXPORT_SYMBOL(acpi_bus_get_private_data);
153 void acpi_bus_no_hotplug(acpi_handle handle)
155 struct acpi_device *adev = NULL;
157 acpi_bus_get_device(handle, &adev);
159 adev->flags.no_hotplug = true;
161 EXPORT_SYMBOL_GPL(acpi_bus_no_hotplug);
163 static void acpi_print_osc_error(acpi_handle handle,
164 struct acpi_osc_context *context, char *error)
166 struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER};
169 if (ACPI_FAILURE(acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer)))
170 printk(KERN_DEBUG "%s\n", error);
172 printk(KERN_DEBUG "%s:%s\n", (char *)buffer.pointer, error);
173 kfree(buffer.pointer);
175 printk(KERN_DEBUG"_OSC request data:");
176 for (i = 0; i < context->cap.length; i += sizeof(u32))
177 printk("%x ", *((u32 *)(context->cap.pointer + i)));
181 acpi_status acpi_str_to_uuid(char *str, u8 *uuid)
184 static int opc_map_to_uuid[16] = {6, 4, 2, 0, 11, 9, 16, 14, 19, 21,
185 24, 26, 28, 30, 32, 34};
187 if (strlen(str) != 36)
188 return AE_BAD_PARAMETER;
189 for (i = 0; i < 36; i++) {
190 if (i == 8 || i == 13 || i == 18 || i == 23) {
192 return AE_BAD_PARAMETER;
193 } else if (!isxdigit(str[i]))
194 return AE_BAD_PARAMETER;
196 for (i = 0; i < 16; i++) {
197 uuid[i] = hex_to_bin(str[opc_map_to_uuid[i]]) << 4;
198 uuid[i] |= hex_to_bin(str[opc_map_to_uuid[i] + 1]);
202 EXPORT_SYMBOL_GPL(acpi_str_to_uuid);
204 acpi_status acpi_run_osc(acpi_handle handle, struct acpi_osc_context *context)
207 struct acpi_object_list input;
208 union acpi_object in_params[4];
209 union acpi_object *out_obj;
212 struct acpi_buffer output = {ACPI_ALLOCATE_BUFFER, NULL};
216 if (ACPI_FAILURE(acpi_str_to_uuid(context->uuid_str, uuid)))
218 context->ret.length = ACPI_ALLOCATE_BUFFER;
219 context->ret.pointer = NULL;
221 /* Setting up input parameters */
223 input.pointer = in_params;
224 in_params[0].type = ACPI_TYPE_BUFFER;
225 in_params[0].buffer.length = 16;
226 in_params[0].buffer.pointer = uuid;
227 in_params[1].type = ACPI_TYPE_INTEGER;
228 in_params[1].integer.value = context->rev;
229 in_params[2].type = ACPI_TYPE_INTEGER;
230 in_params[2].integer.value = context->cap.length/sizeof(u32);
231 in_params[3].type = ACPI_TYPE_BUFFER;
232 in_params[3].buffer.length = context->cap.length;
233 in_params[3].buffer.pointer = context->cap.pointer;
235 status = acpi_evaluate_object(handle, "_OSC", &input, &output);
236 if (ACPI_FAILURE(status))
240 return AE_NULL_OBJECT;
242 out_obj = output.pointer;
243 if (out_obj->type != ACPI_TYPE_BUFFER
244 || out_obj->buffer.length != context->cap.length) {
245 acpi_print_osc_error(handle, context,
246 "_OSC evaluation returned wrong type");
250 /* Need to ignore the bit0 in result code */
251 errors = *((u32 *)out_obj->buffer.pointer) & ~(1 << 0);
253 if (errors & OSC_REQUEST_ERROR)
254 acpi_print_osc_error(handle, context,
255 "_OSC request failed");
256 if (errors & OSC_INVALID_UUID_ERROR)
257 acpi_print_osc_error(handle, context,
258 "_OSC invalid UUID");
259 if (errors & OSC_INVALID_REVISION_ERROR)
260 acpi_print_osc_error(handle, context,
261 "_OSC invalid revision");
262 if (errors & OSC_CAPABILITIES_MASK_ERROR) {
263 if (((u32 *)context->cap.pointer)[OSC_QUERY_DWORD]
273 context->ret.length = out_obj->buffer.length;
274 context->ret.pointer = kmemdup(out_obj->buffer.pointer,
275 context->ret.length, GFP_KERNEL);
276 if (!context->ret.pointer) {
277 status = AE_NO_MEMORY;
283 kfree(output.pointer);
285 context->ret.pointer = NULL;
288 EXPORT_SYMBOL(acpi_run_osc);
290 bool osc_sb_apei_support_acked;
291 static u8 sb_uuid_str[] = "0811B06E-4A27-44F9-8D60-3CBBC22E7B48";
292 static void acpi_bus_osc_support(void)
295 struct acpi_osc_context context = {
296 .uuid_str = sb_uuid_str,
299 .cap.pointer = capbuf,
303 capbuf[OSC_QUERY_DWORD] = OSC_QUERY_ENABLE;
304 capbuf[OSC_SUPPORT_DWORD] = OSC_SB_PR3_SUPPORT; /* _PR3 is in use */
305 #if defined(CONFIG_ACPI_PROCESSOR_AGGREGATOR) ||\
306 defined(CONFIG_ACPI_PROCESSOR_AGGREGATOR_MODULE)
307 capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_PAD_SUPPORT;
310 #if defined(CONFIG_ACPI_PROCESSOR) || defined(CONFIG_ACPI_PROCESSOR_MODULE)
311 capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_PPC_OST_SUPPORT;
314 capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_HOTPLUG_OST_SUPPORT;
317 capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_APEI_SUPPORT;
318 if (ACPI_FAILURE(acpi_get_handle(NULL, "\\_SB", &handle)))
320 if (ACPI_SUCCESS(acpi_run_osc(handle, &context))) {
321 u32 *capbuf_ret = context.ret.pointer;
322 if (context.ret.length > OSC_SUPPORT_DWORD)
323 osc_sb_apei_support_acked =
324 capbuf_ret[OSC_SUPPORT_DWORD] & OSC_SB_APEI_SUPPORT;
325 kfree(context.ret.pointer);
327 /* do we need to check other returned cap? Sounds no */
330 /* --------------------------------------------------------------------------
331 Notification Handling
332 -------------------------------------------------------------------------- */
337 * Callback for all 'system-level' device notifications (values 0x00-0x7F).
339 static void acpi_bus_notify(acpi_handle handle, u32 type, void *data)
341 struct acpi_device *adev;
342 struct acpi_driver *driver;
343 u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE;
344 bool hotplug_event = false;
347 case ACPI_NOTIFY_BUS_CHECK:
348 acpi_handle_debug(handle, "ACPI_NOTIFY_BUS_CHECK event\n");
349 hotplug_event = true;
352 case ACPI_NOTIFY_DEVICE_CHECK:
353 acpi_handle_debug(handle, "ACPI_NOTIFY_DEVICE_CHECK event\n");
354 hotplug_event = true;
357 case ACPI_NOTIFY_DEVICE_WAKE:
358 acpi_handle_debug(handle, "ACPI_NOTIFY_DEVICE_WAKE event\n");
361 case ACPI_NOTIFY_EJECT_REQUEST:
362 acpi_handle_debug(handle, "ACPI_NOTIFY_EJECT_REQUEST event\n");
363 hotplug_event = true;
366 case ACPI_NOTIFY_DEVICE_CHECK_LIGHT:
367 acpi_handle_debug(handle, "ACPI_NOTIFY_DEVICE_CHECK_LIGHT event\n");
368 /* TBD: Exactly what does 'light' mean? */
371 case ACPI_NOTIFY_FREQUENCY_MISMATCH:
372 acpi_handle_err(handle, "Device cannot be configured due "
373 "to a frequency mismatch\n");
376 case ACPI_NOTIFY_BUS_MODE_MISMATCH:
377 acpi_handle_err(handle, "Device cannot be configured due "
378 "to a bus mode mismatch\n");
381 case ACPI_NOTIFY_POWER_FAULT:
382 acpi_handle_err(handle, "Device has suffered a power fault\n");
386 acpi_handle_debug(handle, "Unknown event type 0x%x\n", type);
390 adev = acpi_bus_get_acpi_device(handle);
394 driver = adev->driver;
395 if (driver && driver->ops.notify &&
396 (driver->flags & ACPI_DRIVER_ALL_NOTIFY_EVENTS))
397 driver->ops.notify(adev, type);
399 if (hotplug_event && ACPI_SUCCESS(acpi_hotplug_schedule(adev, type)))
402 acpi_bus_put_acpi_device(adev);
406 acpi_evaluate_ost(handle, type, ost_code, NULL);
409 /* --------------------------------------------------------------------------
410 Initialization/Cleanup
411 -------------------------------------------------------------------------- */
413 static int __init acpi_bus_init_irq(void)
416 char *message = NULL;
420 * Let the system know what interrupt model we are using by
421 * evaluating the \_PIC object, if exists.
424 switch (acpi_irq_model) {
425 case ACPI_IRQ_MODEL_PIC:
428 case ACPI_IRQ_MODEL_IOAPIC:
431 case ACPI_IRQ_MODEL_IOSAPIC:
434 case ACPI_IRQ_MODEL_PLATFORM:
435 message = "platform specific model";
438 printk(KERN_WARNING PREFIX "Unknown interrupt routing model\n");
442 printk(KERN_INFO PREFIX "Using %s for interrupt routing\n", message);
444 status = acpi_execute_simple_method(NULL, "\\_PIC", acpi_irq_model);
445 if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) {
446 ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PIC"));
453 u8 acpi_gbl_permanent_mmap;
456 void __init acpi_early_init(void)
463 printk(KERN_INFO PREFIX "Core revision %08x\n", ACPI_CA_VERSION);
465 /* enable workarounds, unless strict ACPI spec. compliance */
467 acpi_gbl_enable_interpreter_slack = TRUE;
469 acpi_gbl_permanent_mmap = 1;
472 * If the machine falls into the DMI check table,
473 * DSDT will be copied to memory
475 dmi_check_system(dsdt_dmi_table);
477 status = acpi_reallocate_root_table();
478 if (ACPI_FAILURE(status)) {
479 printk(KERN_ERR PREFIX
480 "Unable to reallocate ACPI tables\n");
484 status = acpi_initialize_subsystem();
485 if (ACPI_FAILURE(status)) {
486 printk(KERN_ERR PREFIX
487 "Unable to initialize the ACPI Interpreter\n");
491 status = acpi_load_tables();
492 if (ACPI_FAILURE(status)) {
493 printk(KERN_ERR PREFIX
494 "Unable to load the System Description Tables\n");
500 /* compatible (0) means level (3) */
501 if (!(acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)) {
502 acpi_sci_flags &= ~ACPI_MADT_TRIGGER_MASK;
503 acpi_sci_flags |= ACPI_MADT_TRIGGER_LEVEL;
505 /* Set PIC-mode SCI trigger type */
506 acpi_pic_sci_set_trigger(acpi_gbl_FADT.sci_interrupt,
507 (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2);
510 * now that acpi_gbl_FADT is initialized,
511 * update it with result from INT_SRC_OVR parsing
513 acpi_gbl_FADT.sci_interrupt = acpi_sci_override_gsi;
517 status = acpi_enable_subsystem(~ACPI_NO_ACPI_ENABLE);
518 if (ACPI_FAILURE(status)) {
519 printk(KERN_ERR PREFIX "Unable to enable ACPI\n");
524 * If the system is using ACPI then we can be reasonably
525 * confident that any regulators are managed by the firmware
526 * so tell the regulator core it has everything it needs to
529 regulator_has_full_constraints();
538 static int __init acpi_bus_init(void)
543 acpi_os_initialize1();
545 status = acpi_enable_subsystem(ACPI_NO_ACPI_ENABLE);
546 if (ACPI_FAILURE(status)) {
547 printk(KERN_ERR PREFIX
548 "Unable to start the ACPI Interpreter\n");
553 * ACPI 2.0 requires the EC driver to be loaded and work before
554 * the EC device is found in the namespace (i.e. before acpi_initialize_objects()
557 * This is accomplished by looking for the ECDT table, and getting
558 * the EC parameters out of that.
560 status = acpi_ec_ecdt_probe();
561 /* Ignore result. Not having an ECDT is not fatal. */
563 status = acpi_initialize_objects(ACPI_FULL_INITIALIZATION);
564 if (ACPI_FAILURE(status)) {
565 printk(KERN_ERR PREFIX "Unable to initialize ACPI objects\n");
570 * _OSC method may exist in module level code,
571 * so it must be run after ACPI_FULL_INITIALIZATION
573 acpi_bus_osc_support();
576 * _PDC control method may load dynamic SSDT tables,
577 * and we need to install the table handler before that.
581 acpi_early_processor_set_pdc();
584 * Maybe EC region is required at bus_scan/acpi_get_devices. So it
585 * is necessary to enable it as early as possible.
587 acpi_boot_ec_enable();
589 printk(KERN_INFO PREFIX "Interpreter enabled\n");
591 /* Initialize sleep structures */
595 * Get the system interrupt model and evaluate \_PIC.
597 result = acpi_bus_init_irq();
602 * Register the for all standard device notifications.
605 acpi_install_notify_handler(ACPI_ROOT_OBJECT, ACPI_SYSTEM_NOTIFY,
606 &acpi_bus_notify, NULL);
607 if (ACPI_FAILURE(status)) {
608 printk(KERN_ERR PREFIX
609 "Unable to register for device notifications\n");
614 * Create the top ACPI proc directory
616 acpi_root_dir = proc_mkdir(ACPI_BUS_FILE_ROOT, NULL);
620 /* Mimic structured exception handling */
626 struct kobject *acpi_kobj;
627 EXPORT_SYMBOL_GPL(acpi_kobj);
629 static int __init acpi_init(void)
634 printk(KERN_INFO PREFIX "Interpreter disabled.\n");
638 acpi_kobj = kobject_create_and_add("acpi", firmware_kobj);
640 printk(KERN_WARNING "%s: kset create error\n", __func__);
644 init_acpi_device_notify();
645 result = acpi_bus_init();
651 pci_mmcfg_late_init();
655 acpi_sleep_proc_init();
656 acpi_wakeup_device_init();
660 subsys_initcall(acpi_init);