Orange Pi5 kernel

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 *  acpi_bus.c - ACPI Bus Driver ($Revision: 80 $)
 *
 *  Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
 */
 
#include <linux/module.h>
#include <linux/init.h>
#include <linux/ioport.h>
#include <linux/kernel.h>
#include <linux/list.h>
#include <linux/sched.h>
#include <linux/pm.h>
#include <linux/device.h>
#include <linux/proc_fs.h>
#include <linux/acpi.h>
#include <linux/slab.h>
#include <linux/regulator/machine.h>
#include <linux/workqueue.h>
#include <linux/reboot.h>
#include <linux/delay.h>
#ifdef CONFIG_X86
#include <asm/mpspec.h>
#include <linux/dmi.h>
#endif
#include <linux/acpi_iort.h>
#include <linux/pci.h>
#include <acpi/apei.h>
#include <linux/suspend.h>
 
#include "internal.h"
 
#define _COMPONENT		ACPI_BUS_COMPONENT
ACPI_MODULE_NAME("bus");
 
struct acpi_device *acpi_root;
struct proc_dir_entry *acpi_root_dir;
EXPORT_SYMBOL(acpi_root_dir);
 
#ifdef CONFIG_X86
#ifdef CONFIG_ACPI_CUSTOM_DSDT
static inline int set_copy_dsdt(const struct dmi_system_id *id)
{
<------>return 0;
}
#else
static int set_copy_dsdt(const struct dmi_system_id *id)
{
<------>printk(KERN_NOTICE "%s detected - "
<------><------>"force copy of DSDT to local memory\n", id->ident);
<------>acpi_gbl_copy_dsdt_locally = 1;
<------>return 0;
}
#endif
 
static const struct dmi_system_id dsdt_dmi_table[] __initconst = {
<------>/*
<------> * Invoke DSDT corruption work-around on all Toshiba Satellite.
<------> * https://bugzilla.kernel.org/show_bug.cgi?id=14679
<------> */
<------>{
<------> .callback = set_copy_dsdt,
<------> .ident = "TOSHIBA Satellite",
<------> .matches = {
<------><------>DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
<------><------>DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"),
<------><------>},
<------>},
<------>{}
};
#endif
 
/* --------------------------------------------------------------------------
                                Device Management
   -------------------------------------------------------------------------- */
 
acpi_status acpi_bus_get_status_handle(acpi_handle handle,
<------><------><------><------>       unsigned long long *sta)
{
<------>acpi_status status;
 
<------>status = acpi_evaluate_integer(handle, "_STA", NULL, sta);
<------>if (ACPI_SUCCESS(status))
<------><------>return AE_OK;
 
<------>if (status == AE_NOT_FOUND) {
<------><------>*sta = ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED |
<------><------>       ACPI_STA_DEVICE_UI      | ACPI_STA_DEVICE_FUNCTIONING;
<------><------>return AE_OK;
<------>}
<------>return status;
}
EXPORT_SYMBOL_GPL(acpi_bus_get_status_handle);
 
int acpi_bus_get_status(struct acpi_device *device)
{
<------>acpi_status status;
<------>unsigned long long sta;
 
<------>if (acpi_device_override_status(device, &sta)) {
<------><------>acpi_set_device_status(device, sta);
<------><------>return 0;
<------>}
 
<------>/* Battery devices must have their deps met before calling _STA */
<------>if (acpi_device_is_battery(device) && device->dep_unmet) {
<------><------>acpi_set_device_status(device, 0);
<------><------>return 0;
<------>}
 
<------>status = acpi_bus_get_status_handle(device->handle, &sta);
<------>if (ACPI_FAILURE(status))
<------><------>return -ENODEV;
 
<------>acpi_set_device_status(device, sta);
 
<------>if (device->status.functional && !device->status.present) {
<------><------>ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]: "
<------><------>       "functional but not present;\n",
<------><------><------>device->pnp.bus_id, (u32)sta));
<------>}
 
<------>ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]\n",
<------><------><------>  device->pnp.bus_id, (u32)sta));
<------>return 0;
}
EXPORT_SYMBOL(acpi_bus_get_status);
 
void acpi_bus_private_data_handler(acpi_handle handle,
<------><------><------><------>   void *context)
{
<------>return;
}
EXPORT_SYMBOL(acpi_bus_private_data_handler);
 
int acpi_bus_attach_private_data(acpi_handle handle, void *data)
{
<------>acpi_status status;
 
<------>status = acpi_attach_data(handle,
<------><------><------>acpi_bus_private_data_handler, data);
<------>if (ACPI_FAILURE(status)) {
<------><------>acpi_handle_debug(handle, "Error attaching device data\n");
<------><------>return -ENODEV;
<------>}
 
<------>return 0;
}
EXPORT_SYMBOL_GPL(acpi_bus_attach_private_data);
 
int acpi_bus_get_private_data(acpi_handle handle, void **data)
{
<------>acpi_status status;
 
<------>if (!data)
<------><------>return -EINVAL;
 
<------>status = acpi_get_data(handle, acpi_bus_private_data_handler, data);
<------>if (ACPI_FAILURE(status)) {
<------><------>acpi_handle_debug(handle, "No context for object\n");
<------><------>return -ENODEV;
<------>}
 
<------>return 0;
}
EXPORT_SYMBOL_GPL(acpi_bus_get_private_data);
 
void acpi_bus_detach_private_data(acpi_handle handle)
{
<------>acpi_detach_data(handle, acpi_bus_private_data_handler);
}
EXPORT_SYMBOL_GPL(acpi_bus_detach_private_data);
 
static void acpi_print_osc_error(acpi_handle handle,
<------><------><------><------> struct acpi_osc_context *context, char *error)
{
<------>int i;
 
<------>acpi_handle_debug(handle, "(%s): %s\n", context->uuid_str, error);
 
<------>pr_debug("_OSC request data:");
<------>for (i = 0; i < context->cap.length; i += sizeof(u32))
<------><------>pr_debug(" %x", *((u32 *)(context->cap.pointer + i)));
 
<------>pr_debug("\n");
}
 
acpi_status acpi_run_osc(acpi_handle handle, struct acpi_osc_context *context)
{
<------>acpi_status status;
<------>struct acpi_object_list input;
<------>union acpi_object in_params[4];
<------>union acpi_object *out_obj;
<------>guid_t guid;
<------>u32 errors;
<------>struct acpi_buffer output = {ACPI_ALLOCATE_BUFFER, NULL};
 
<------>if (!context)
<------><------>return AE_ERROR;
<------>if (guid_parse(context->uuid_str, &guid))
<------><------>return AE_ERROR;
<------>context->ret.length = ACPI_ALLOCATE_BUFFER;
<------>context->ret.pointer = NULL;
 
<------>/* Setting up input parameters */
<------>input.count = 4;
<------>input.pointer = in_params;
<------>in_params[0].type 		= ACPI_TYPE_BUFFER;
<------>in_params[0].buffer.length 	= 16;
<------>in_params[0].buffer.pointer	= (u8 *)&guid;
<------>in_params[1].type 		= ACPI_TYPE_INTEGER;
<------>in_params[1].integer.value 	= context->rev;
<------>in_params[2].type 		= ACPI_TYPE_INTEGER;
<------>in_params[2].integer.value	= context->cap.length/sizeof(u32);
<------>in_params[3].type		= ACPI_TYPE_BUFFER;
<------>in_params[3].buffer.length 	= context->cap.length;
<------>in_params[3].buffer.pointer 	= context->cap.pointer;
 
<------>status = acpi_evaluate_object(handle, "_OSC", &input, &output);
<------>if (ACPI_FAILURE(status))
<------><------>return status;
 
<------>if (!output.length)
<------><------>return AE_NULL_OBJECT;
 
<------>out_obj = output.pointer;
<------>if (out_obj->type != ACPI_TYPE_BUFFER
<------><------>|| out_obj->buffer.length != context->cap.length) {
<------><------>acpi_print_osc_error(handle, context,
<------><------><------>"_OSC evaluation returned wrong type");
<------><------>status = AE_TYPE;
<------><------>goto out_kfree;
<------>}
<------>/* Need to ignore the bit0 in result code */
<------>errors = *((u32 *)out_obj->buffer.pointer) & ~(1 << 0);
<------>if (errors) {
<------><------>if (errors & OSC_REQUEST_ERROR)
<------><------><------>acpi_print_osc_error(handle, context,
<------><------><------><------>"_OSC request failed");
<------><------>if (errors & OSC_INVALID_UUID_ERROR)
<------><------><------>acpi_print_osc_error(handle, context,
<------><------><------><------>"_OSC invalid UUID");
<------><------>if (errors & OSC_INVALID_REVISION_ERROR)
<------><------><------>acpi_print_osc_error(handle, context,
<------><------><------><------>"_OSC invalid revision");
<------><------>if (errors & OSC_CAPABILITIES_MASK_ERROR) {
<------><------><------>if (((u32 *)context->cap.pointer)[OSC_QUERY_DWORD]
<------><------><------>    & OSC_QUERY_ENABLE)
<------><------><------><------>goto out_success;
<------><------><------>status = AE_SUPPORT;
<------><------><------>goto out_kfree;
<------><------>}
<------><------>status = AE_ERROR;
<------><------>goto out_kfree;
<------>}
out_success:
<------>context->ret.length = out_obj->buffer.length;
<------>context->ret.pointer = kmemdup(out_obj->buffer.pointer,
<------><------><------><------>       context->ret.length, GFP_KERNEL);
<------>if (!context->ret.pointer) {
<------><------>status =  AE_NO_MEMORY;
<------><------>goto out_kfree;
<------>}
<------>status =  AE_OK;
 
out_kfree:
<------>kfree(output.pointer);
<------>if (status != AE_OK)
<------><------>context->ret.pointer = NULL;
<------>return status;
}
EXPORT_SYMBOL(acpi_run_osc);
 
bool osc_sb_apei_support_acked;
 
/*
 * ACPI 6.0 Section 8.4.4.2 Idle State Coordination
 * OSPM supports platform coordinated low power idle(LPI) states
 */
bool osc_pc_lpi_support_confirmed;
EXPORT_SYMBOL_GPL(osc_pc_lpi_support_confirmed);
 
static u8 sb_uuid_str[] = "0811B06E-4A27-44F9-8D60-3CBBC22E7B48";
static void acpi_bus_osc_support(void)
{
<------>u32 capbuf[2];
<------>struct acpi_osc_context context = {
<------><------>.uuid_str = sb_uuid_str,
<------><------>.rev = 1,
<------><------>.cap.length = 8,
<------><------>.cap.pointer = capbuf,
<------>};
<------>acpi_handle handle;
 
<------>capbuf[OSC_QUERY_DWORD] = OSC_QUERY_ENABLE;
<------>capbuf[OSC_SUPPORT_DWORD] = OSC_SB_PR3_SUPPORT; /* _PR3 is in use */
<------>if (IS_ENABLED(CONFIG_ACPI_PROCESSOR_AGGREGATOR))
<------><------>capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_PAD_SUPPORT;
<------>if (IS_ENABLED(CONFIG_ACPI_PROCESSOR))
<------><------>capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_PPC_OST_SUPPORT;
 
<------>capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_HOTPLUG_OST_SUPPORT;
<------>capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_PCLPI_SUPPORT;
 
#ifdef CONFIG_ARM64
<------>capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_GENERIC_INITIATOR_SUPPORT;
#endif
#ifdef CONFIG_X86
<------>capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_GENERIC_INITIATOR_SUPPORT;
<------>if (boot_cpu_has(X86_FEATURE_HWP)) {
<------><------>capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_CPC_SUPPORT;
<------><------>capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_CPCV2_SUPPORT;
<------>}
#endif
 
<------>if (IS_ENABLED(CONFIG_SCHED_MC_PRIO))
<------><------>capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_CPC_DIVERSE_HIGH_SUPPORT;
 
<------>if (!ghes_disable)
<------><------>capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_APEI_SUPPORT;
<------>if (ACPI_FAILURE(acpi_get_handle(NULL, "\\_SB", &handle)))
<------><------>return;
<------>if (ACPI_SUCCESS(acpi_run_osc(handle, &context))) {
<------><------>u32 *capbuf_ret = context.ret.pointer;
<------><------>if (context.ret.length > OSC_SUPPORT_DWORD) {
<------><------><------>osc_sb_apei_support_acked =
<------><------><------><------>capbuf_ret[OSC_SUPPORT_DWORD] & OSC_SB_APEI_SUPPORT;
<------><------><------>osc_pc_lpi_support_confirmed =
<------><------><------><------>capbuf_ret[OSC_SUPPORT_DWORD] & OSC_SB_PCLPI_SUPPORT;
<------><------>}
<------><------>kfree(context.ret.pointer);
<------>}
<------>/* do we need to check other returned cap? Sounds no */
}
 
/* --------------------------------------------------------------------------
                             Notification Handling
   -------------------------------------------------------------------------- */
 
/**
 * acpi_bus_notify
 * ---------------
 * Callback for all 'system-level' device notifications (values 0x00-0x7F).
 */
static void acpi_bus_notify(acpi_handle handle, u32 type, void *data)
{
<------>struct acpi_device *adev;
<------>struct acpi_driver *driver;
<------>u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE;
<------>bool hotplug_event = false;
 
<------>switch (type) {
<------>case ACPI_NOTIFY_BUS_CHECK:
<------><------>acpi_handle_debug(handle, "ACPI_NOTIFY_BUS_CHECK event\n");
<------><------>hotplug_event = true;
<------><------>break;
 
<------>case ACPI_NOTIFY_DEVICE_CHECK:
<------><------>acpi_handle_debug(handle, "ACPI_NOTIFY_DEVICE_CHECK event\n");
<------><------>hotplug_event = true;
<------><------>break;
 
<------>case ACPI_NOTIFY_DEVICE_WAKE:
<------><------>acpi_handle_debug(handle, "ACPI_NOTIFY_DEVICE_WAKE event\n");
<------><------>break;
 
<------>case ACPI_NOTIFY_EJECT_REQUEST:
<------><------>acpi_handle_debug(handle, "ACPI_NOTIFY_EJECT_REQUEST event\n");
<------><------>hotplug_event = true;
<------><------>break;
 
<------>case ACPI_NOTIFY_DEVICE_CHECK_LIGHT:
<------><------>acpi_handle_debug(handle, "ACPI_NOTIFY_DEVICE_CHECK_LIGHT event\n");
<------><------>/* TBD: Exactly what does 'light' mean? */
<------><------>break;
 
<------>case ACPI_NOTIFY_FREQUENCY_MISMATCH:
<------><------>acpi_handle_err(handle, "Device cannot be configured due "
<------><------><------><------>"to a frequency mismatch\n");
<------><------>break;
 
<------>case ACPI_NOTIFY_BUS_MODE_MISMATCH:
<------><------>acpi_handle_err(handle, "Device cannot be configured due "
<------><------><------><------>"to a bus mode mismatch\n");
<------><------>break;
 
<------>case ACPI_NOTIFY_POWER_FAULT:
<------><------>acpi_handle_err(handle, "Device has suffered a power fault\n");
<------><------>break;
 
<------>default:
<------><------>acpi_handle_debug(handle, "Unknown event type 0x%x\n", type);
<------><------>break;
<------>}
 
<------>adev = acpi_bus_get_acpi_device(handle);
<------>if (!adev)
<------><------>goto err;
 
<------>driver = adev->driver;
<------>if (driver && driver->ops.notify &&
<------>    (driver->flags & ACPI_DRIVER_ALL_NOTIFY_EVENTS))
<------><------>driver->ops.notify(adev, type);
 
<------>if (!hotplug_event) {
<------><------>acpi_bus_put_acpi_device(adev);
<------><------>return;
<------>}
 
<------>if (ACPI_SUCCESS(acpi_hotplug_schedule(adev, type)))
<------><------>return;
 
<------>acpi_bus_put_acpi_device(adev);
 
 err:
<------>acpi_evaluate_ost(handle, type, ost_code, NULL);
}
 
static void acpi_device_notify(acpi_handle handle, u32 event, void *data)
{
<------>struct acpi_device *device = data;
 
<------>device->driver->ops.notify(device, event);
}
 
static void acpi_device_notify_fixed(void *data)
{
<------>struct acpi_device *device = data;
 
<------>/* Fixed hardware devices have no handles */
<------>acpi_device_notify(NULL, ACPI_FIXED_HARDWARE_EVENT, device);
}
 
static u32 acpi_device_fixed_event(void *data)
{
<------>acpi_os_execute(OSL_NOTIFY_HANDLER, acpi_device_notify_fixed, data);
<------>return ACPI_INTERRUPT_HANDLED;
}
 
static int acpi_device_install_notify_handler(struct acpi_device *device)
{
<------>acpi_status status;
 
<------>if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON)
<------><------>status =
<------><------>    acpi_install_fixed_event_handler(ACPI_EVENT_POWER_BUTTON,
<------><------><------><------><------><------>     acpi_device_fixed_event,
<------><------><------><------><------><------>     device);
<------>else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON)
<------><------>status =
<------><------>    acpi_install_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON,
<------><------><------><------><------><------>     acpi_device_fixed_event,
<------><------><------><------><------><------>     device);
<------>else
<------><------>status = acpi_install_notify_handler(device->handle,
<------><------><------><------><------><------>     ACPI_DEVICE_NOTIFY,
<------><------><------><------><------><------>     acpi_device_notify,
<------><------><------><------><------><------>     device);
 
<------>if (ACPI_FAILURE(status))
<------><------>return -EINVAL;
<------>return 0;
}
 
static void acpi_device_remove_notify_handler(struct acpi_device *device)
{
<------>if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON)
<------><------>acpi_remove_fixed_event_handler(ACPI_EVENT_POWER_BUTTON,
<------><------><------><------><------><------>acpi_device_fixed_event);
<------>else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON)
<------><------>acpi_remove_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON,
<------><------><------><------><------><------>acpi_device_fixed_event);
<------>else
<------><------>acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY,
<------><------><------><------><------>   acpi_device_notify);
}
 
/* Handle events targeting \_SB device (at present only graceful shutdown) */
 
#define ACPI_SB_NOTIFY_SHUTDOWN_REQUEST 0x81
#define ACPI_SB_INDICATE_INTERVAL	10000
 
static void sb_notify_work(struct work_struct *dummy)
{
<------>acpi_handle sb_handle;
 
<------>orderly_poweroff(true);
 
<------>/*
<------> * After initiating graceful shutdown, the ACPI spec requires OSPM
<------> * to evaluate _OST method once every 10seconds to indicate that
<------> * the shutdown is in progress
<------> */
<------>acpi_get_handle(NULL, "\\_SB", &sb_handle);
<------>while (1) {
<------><------>pr_info("Graceful shutdown in progress.\n");
<------><------>acpi_evaluate_ost(sb_handle, ACPI_OST_EC_OSPM_SHUTDOWN,
<------><------><------><------>ACPI_OST_SC_OS_SHUTDOWN_IN_PROGRESS, NULL);
<------><------>msleep(ACPI_SB_INDICATE_INTERVAL);
<------>}
}
 
static void acpi_sb_notify(acpi_handle handle, u32 event, void *data)
{
<------>static DECLARE_WORK(acpi_sb_work, sb_notify_work);
 
<------>if (event == ACPI_SB_NOTIFY_SHUTDOWN_REQUEST) {
<------><------>if (!work_busy(&acpi_sb_work))
<------><------><------>schedule_work(&acpi_sb_work);
<------>} else
<------><------>pr_warn("event %x is not supported by \\_SB device\n", event);
}
 
static int __init acpi_setup_sb_notify_handler(void)
{
<------>acpi_handle sb_handle;
 
<------>if (ACPI_FAILURE(acpi_get_handle(NULL, "\\_SB", &sb_handle)))
<------><------>return -ENXIO;
 
<------>if (ACPI_FAILURE(acpi_install_notify_handler(sb_handle, ACPI_DEVICE_NOTIFY,
<------><------><------><------><------><------>acpi_sb_notify, NULL)))
<------><------>return -EINVAL;
 
<------>return 0;
}
 
/* --------------------------------------------------------------------------
                             Device Matching
   -------------------------------------------------------------------------- */
 
/**
 * acpi_get_first_physical_node - Get first physical node of an ACPI device
 * @adev:	ACPI device in question
 *
 * Return: First physical node of ACPI device @adev
 */
struct device *acpi_get_first_physical_node(struct acpi_device *adev)
{
<------>struct mutex *physical_node_lock = &adev->physical_node_lock;
<------>struct device *phys_dev;
 
<------>mutex_lock(physical_node_lock);
<------>if (list_empty(&adev->physical_node_list)) {
<------><------>phys_dev = NULL;
<------>} else {
<------><------>const struct acpi_device_physical_node *node;
 
<------><------>node = list_first_entry(&adev->physical_node_list,
<------><------><------><------><------>struct acpi_device_physical_node, node);
 
<------><------>phys_dev = node->dev;
<------>}
<------>mutex_unlock(physical_node_lock);
<------>return phys_dev;
}
EXPORT_SYMBOL_GPL(acpi_get_first_physical_node);
 
static struct acpi_device *acpi_primary_dev_companion(struct acpi_device *adev,
<------><------><------><------><------><------>      const struct device *dev)
{
<------>const struct device *phys_dev = acpi_get_first_physical_node(adev);
 
<------>return phys_dev && phys_dev == dev ? adev : NULL;
}
 
/**
 * acpi_device_is_first_physical_node - Is given dev first physical node
 * @adev: ACPI companion device
 * @dev: Physical device to check
 *
 * Function checks if given @dev is the first physical devices attached to
 * the ACPI companion device. This distinction is needed in some cases
 * where the same companion device is shared between many physical devices.
 *
 * Note that the caller have to provide valid @adev pointer.
 */
bool acpi_device_is_first_physical_node(struct acpi_device *adev,
<------><------><------><------><------>const struct device *dev)
{
<------>return !!acpi_primary_dev_companion(adev, dev);
}
 
/*
 * acpi_companion_match() - Can we match via ACPI companion device
 * @dev: Device in question
 *
 * Check if the given device has an ACPI companion and if that companion has
 * a valid list of PNP IDs, and if the device is the first (primary) physical
 * device associated with it.  Return the companion pointer if that's the case
 * or NULL otherwise.
 *
 * If multiple physical devices are attached to a single ACPI companion, we need
 * to be careful.  The usage scenario for this kind of relationship is that all
 * of the physical devices in question use resources provided by the ACPI
 * companion.  A typical case is an MFD device where all the sub-devices share
 * the parent's ACPI companion.  In such cases we can only allow the primary
 * (first) physical device to be matched with the help of the companion's PNP
 * IDs.
 *
 * Additional physical devices sharing the ACPI companion can still use
 * resources available from it but they will be matched normally using functions
 * provided by their bus types (and analogously for their modalias).
 */
struct acpi_device *acpi_companion_match(const struct device *dev)
{
<------>struct acpi_device *adev;
 
<------>adev = ACPI_COMPANION(dev);
<------>if (!adev)
<------><------>return NULL;
 
<------>if (list_empty(&adev->pnp.ids))
<------><------>return NULL;
 
<------>return acpi_primary_dev_companion(adev, dev);
}
 
/**
 * acpi_of_match_device - Match device object using the "compatible" property.
 * @adev: ACPI device object to match.
 * @of_match_table: List of device IDs to match against.
 * @of_id: OF ID if matched
 *
 * If @dev has an ACPI companion which has ACPI_DT_NAMESPACE_HID in its list of
 * identifiers and a _DSD object with the "compatible" property, use that
 * property to match against the given list of identifiers.
 */
static bool acpi_of_match_device(struct acpi_device *adev,
<------><------><------><------> const struct of_device_id *of_match_table,
<------><------><------><------> const struct of_device_id **of_id)
{
<------>const union acpi_object *of_compatible, *obj;
<------>int i, nval;
 
<------>if (!adev)
<------><------>return false;
 
<------>of_compatible = adev->data.of_compatible;
<------>if (!of_match_table || !of_compatible)
<------><------>return false;
 
<------>if (of_compatible->type == ACPI_TYPE_PACKAGE) {
<------><------>nval = of_compatible->package.count;
<------><------>obj = of_compatible->package.elements;
<------>} else { /* Must be ACPI_TYPE_STRING. */
<------><------>nval = 1;
<------><------>obj = of_compatible;
<------>}
<------>/* Now we can look for the driver DT compatible strings */
<------>for (i = 0; i < nval; i++, obj++) {
<------><------>const struct of_device_id *id;
 
<------><------>for (id = of_match_table; id->compatible[0]; id++)
<------><------><------>if (!strcasecmp(obj->string.pointer, id->compatible)) {
<------><------><------><------>if (of_id)
<------><------><------><------><------>*of_id = id;
<------><------><------><------>return true;
<------><------><------>}
<------>}
 
<------>return false;
}
 
static bool acpi_of_modalias(struct acpi_device *adev,
<------><------><------>     char *modalias, size_t len)
{
<------>const union acpi_object *of_compatible;
<------>const union acpi_object *obj;
<------>const char *str, *chr;
 
<------>of_compatible = adev->data.of_compatible;
<------>if (!of_compatible)
<------><------>return false;
 
<------>if (of_compatible->type == ACPI_TYPE_PACKAGE)
<------><------>obj = of_compatible->package.elements;
<------>else /* Must be ACPI_TYPE_STRING. */
<------><------>obj = of_compatible;
 
<------>str = obj->string.pointer;
<------>chr = strchr(str, ',');
<------>strlcpy(modalias, chr ? chr + 1 : str, len);
 
<------>return true;
}
 
/**
 * acpi_set_modalias - Set modalias using "compatible" property or supplied ID
 * @adev:	ACPI device object to match
 * @default_id:	ID string to use as default if no compatible string found
 * @modalias:   Pointer to buffer that modalias value will be copied into
 * @len:	Length of modalias buffer
 *
 * This is a counterpart of of_modalias_node() for struct acpi_device objects.
 * If there is a compatible string for @adev, it will be copied to @modalias
 * with the vendor prefix stripped; otherwise, @default_id will be used.
 */
void acpi_set_modalias(struct acpi_device *adev, const char *default_id,
<------><------>       char *modalias, size_t len)
{
<------>if (!acpi_of_modalias(adev, modalias, len))
<------><------>strlcpy(modalias, default_id, len);
}
EXPORT_SYMBOL_GPL(acpi_set_modalias);
 
static bool __acpi_match_device_cls(const struct acpi_device_id *id,
<------><------><------><------>    struct acpi_hardware_id *hwid)
{
<------>int i, msk, byte_shift;
<------>char buf[3];
 
<------>if (!id->cls)
<------><------>return false;
 
<------>/* Apply class-code bitmask, before checking each class-code byte */
<------>for (i = 1; i <= 3; i++) {
<------><------>byte_shift = 8 * (3 - i);
<------><------>msk = (id->cls_msk >> byte_shift) & 0xFF;
<------><------>if (!msk)
<------><------><------>continue;
 
<------><------>sprintf(buf, "%02x", (id->cls >> byte_shift) & msk);
<------><------>if (strncmp(buf, &hwid->id[(i - 1) * 2], 2))
<------><------><------>return false;
<------>}
<------>return true;
}
 
static bool __acpi_match_device(struct acpi_device *device,
<------><------><------><------>const struct acpi_device_id *acpi_ids,
<------><------><------><------>const struct of_device_id *of_ids,
<------><------><------><------>const struct acpi_device_id **acpi_id,
<------><------><------><------>const struct of_device_id **of_id)
{
<------>const struct acpi_device_id *id;
<------>struct acpi_hardware_id *hwid;
 
<------>/*
<------> * If the device is not present, it is unnecessary to load device
<------> * driver for it.
<------> */
<------>if (!device || !device->status.present)
<------><------>return false;
 
<------>list_for_each_entry(hwid, &device->pnp.ids, list) {
<------><------>/* First, check the ACPI/PNP IDs provided by the caller. */
<------><------>if (acpi_ids) {
<------><------><------>for (id = acpi_ids; id->id[0] || id->cls; id++) {
<------><------><------><------>if (id->id[0] && !strcmp((char *)id->id, hwid->id))
<------><------><------><------><------>goto out_acpi_match;
<------><------><------><------>if (id->cls && __acpi_match_device_cls(id, hwid))
<------><------><------><------><------>goto out_acpi_match;
<------><------><------>}
<------><------>}
 
<------><------>/*
<------><------> * Next, check ACPI_DT_NAMESPACE_HID and try to match the
<------><------> * "compatible" property if found.
<------><------> */
<------><------>if (!strcmp(ACPI_DT_NAMESPACE_HID, hwid->id))
<------><------><------>return acpi_of_match_device(device, of_ids, of_id);
<------>}
<------>return false;
 
out_acpi_match:
<------>if (acpi_id)
<------><------>*acpi_id = id;
<------>return true;
}
 
/**
 * acpi_match_device - Match a struct device against a given list of ACPI IDs
 * @ids: Array of struct acpi_device_id object to match against.
 * @dev: The device structure to match.
 *
 * Check if @dev has a valid ACPI handle and if there is a struct acpi_device
 * object for that handle and use that object to match against a given list of
 * device IDs.
 *
 * Return a pointer to the first matching ID on success or %NULL on failure.
 */
const struct acpi_device_id *acpi_match_device(const struct acpi_device_id *ids,
<------><------><------><------><------>       const struct device *dev)
{
<------>const struct acpi_device_id *id = NULL;
 
<------>__acpi_match_device(acpi_companion_match(dev), ids, NULL, &id, NULL);
<------>return id;
}
EXPORT_SYMBOL_GPL(acpi_match_device);
 
static const void *acpi_of_device_get_match_data(const struct device *dev)
{
<------>struct acpi_device *adev = ACPI_COMPANION(dev);
<------>const struct of_device_id *match = NULL;
 
<------>if (!acpi_of_match_device(adev, dev->driver->of_match_table, &match))
<------><------>return NULL;
 
<------>return match->data;
}
 
const void *acpi_device_get_match_data(const struct device *dev)
{
<------>const struct acpi_device_id *match;
 
<------>if (!dev->driver->acpi_match_table)
<------><------>return acpi_of_device_get_match_data(dev);
 
<------>match = acpi_match_device(dev->driver->acpi_match_table, dev);
<------>if (!match)
<------><------>return NULL;
 
<------>return (const void *)match->driver_data;
}
EXPORT_SYMBOL_GPL(acpi_device_get_match_data);
 
int acpi_match_device_ids(struct acpi_device *device,
<------><------><------>  const struct acpi_device_id *ids)
{
<------>return __acpi_match_device(device, ids, NULL, NULL, NULL) ? 0 : -ENOENT;
}
EXPORT_SYMBOL(acpi_match_device_ids);
 
bool acpi_driver_match_device(struct device *dev,
<------><------><------>      const struct device_driver *drv)
{
<------>if (!drv->acpi_match_table)
<------><------>return acpi_of_match_device(ACPI_COMPANION(dev),
<------><------><------><------><------>    drv->of_match_table,
<------><------><------><------><------>    NULL);
 
<------>return __acpi_match_device(acpi_companion_match(dev),
<------><------><------><------>   drv->acpi_match_table, drv->of_match_table,
<------><------><------><------>   NULL, NULL);
}
EXPORT_SYMBOL_GPL(acpi_driver_match_device);
 
/* --------------------------------------------------------------------------
                              ACPI Driver Management
   -------------------------------------------------------------------------- */
 
/**
 * acpi_bus_register_driver - register a driver with the ACPI bus
 * @driver: driver being registered
 *
 * Registers a driver with the ACPI bus.  Searches the namespace for all
 * devices that match the driver's criteria and binds.  Returns zero for
 * success or a negative error status for failure.
 */
int acpi_bus_register_driver(struct acpi_driver *driver)
{
<------>int ret;
 
<------>if (acpi_disabled)
<------><------>return -ENODEV;
<------>driver->drv.name = driver->name;
<------>driver->drv.bus = &acpi_bus_type;
<------>driver->drv.owner = driver->owner;
 
<------>ret = driver_register(&driver->drv);
<------>return ret;
}
 
EXPORT_SYMBOL(acpi_bus_register_driver);
 
/**
 * acpi_bus_unregister_driver - unregisters a driver with the ACPI bus
 * @driver: driver to unregister
 *
 * Unregisters a driver with the ACPI bus.  Searches the namespace for all
 * devices that match the driver's criteria and unbinds.
 */
void acpi_bus_unregister_driver(struct acpi_driver *driver)
{
<------>driver_unregister(&driver->drv);
}
 
EXPORT_SYMBOL(acpi_bus_unregister_driver);
 
/* --------------------------------------------------------------------------
                              ACPI Bus operations
   -------------------------------------------------------------------------- */
 
static int acpi_bus_match(struct device *dev, struct device_driver *drv)
{
<------>struct acpi_device *acpi_dev = to_acpi_device(dev);
<------>struct acpi_driver *acpi_drv = to_acpi_driver(drv);
 
<------>return acpi_dev->flags.match_driver
<------><------>&& !acpi_match_device_ids(acpi_dev, acpi_drv->ids);
}
 
static int acpi_device_uevent(struct device *dev, struct kobj_uevent_env *env)
{
<------>return __acpi_device_uevent_modalias(to_acpi_device(dev), env);
}
 
static int acpi_device_probe(struct device *dev)
{
<------>struct acpi_device *acpi_dev = to_acpi_device(dev);
<------>struct acpi_driver *acpi_drv = to_acpi_driver(dev->driver);
<------>int ret;
 
<------>if (acpi_dev->handler && !acpi_is_pnp_device(acpi_dev))
<------><------>return -EINVAL;
 
<------>if (!acpi_drv->ops.add)
<------><------>return -ENOSYS;
 
<------>ret = acpi_drv->ops.add(acpi_dev);
<------>if (ret)
<------><------>return ret;
 
<------>acpi_dev->driver = acpi_drv;
<------>ACPI_DEBUG_PRINT((ACPI_DB_INFO,
<------><------><------>  "Driver [%s] successfully bound to device [%s]\n",
<------><------><------>  acpi_drv->name, acpi_dev->pnp.bus_id));
 
<------>if (acpi_drv->ops.notify) {
<------><------>ret = acpi_device_install_notify_handler(acpi_dev);
<------><------>if (ret) {
<------><------><------>if (acpi_drv->ops.remove)
<------><------><------><------>acpi_drv->ops.remove(acpi_dev);
 
<------><------><------>acpi_dev->driver = NULL;
<------><------><------>acpi_dev->driver_data = NULL;
<------><------><------>return ret;
<------><------>}
<------>}
 
<------>ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found driver [%s] for device [%s]\n",
<------><------><------>  acpi_drv->name, acpi_dev->pnp.bus_id));
<------>get_device(dev);
<------>return 0;
}
 
static int acpi_device_remove(struct device *dev)
{
<------>struct acpi_device *acpi_dev = to_acpi_device(dev);
<------>struct acpi_driver *acpi_drv = acpi_dev->driver;
 
<------>if (acpi_drv) {
<------><------>if (acpi_drv->ops.notify)
<------><------><------>acpi_device_remove_notify_handler(acpi_dev);
<------><------>if (acpi_drv->ops.remove)
<------><------><------>acpi_drv->ops.remove(acpi_dev);
<------>}
<------>acpi_dev->driver = NULL;
<------>acpi_dev->driver_data = NULL;
 
<------>put_device(dev);
<------>return 0;
}
 
struct bus_type acpi_bus_type = {
<------>.name		= "acpi",
<------>.match		= acpi_bus_match,
<------>.probe		= acpi_device_probe,
<------>.remove		= acpi_device_remove,
<------>.uevent		= acpi_device_uevent,
};
 
/* --------------------------------------------------------------------------
                             Initialization/Cleanup
   -------------------------------------------------------------------------- */
 
static int __init acpi_bus_init_irq(void)
{
<------>acpi_status status;
<------>char *message = NULL;
 
 
<------>/*
<------> * 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;
<------>case ACPI_IRQ_MODEL_GIC:
<------><------>message = "GIC";
<------><------>break;
<------>case ACPI_IRQ_MODEL_PLATFORM:
<------><------>message = "platform specific model";
<------><------>break;
<------>default:
<------><------>printk(KERN_WARNING PREFIX "Unknown interrupt routing model\n");
<------><------>return -ENODEV;
<------>}
 
<------>printk(KERN_INFO PREFIX "Using %s for interrupt routing\n", message);
 
<------>status = acpi_execute_simple_method(NULL, "\\_PIC", acpi_irq_model);
<------>if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) {
<------><------>ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PIC"));
<------><------>return -ENODEV;
<------>}
 
<------>return 0;
}
 
/**
 * acpi_early_init - Initialize ACPICA and populate the ACPI namespace.
 *
 * The ACPI tables are accessible after this, but the handling of events has not
 * been initialized and the global lock is not available yet, so AML should not
 * be executed at this point.
 *
 * Doing this before switching the EFI runtime services to virtual mode allows
 * the EfiBootServices memory to be freed slightly earlier on boot.
 */
void __init acpi_early_init(void)
{
<------>acpi_status status;
 
<------>if (acpi_disabled)
<------><------>return;
 
<------>printk(KERN_INFO PREFIX "Core revision %08x\n", ACPI_CA_VERSION);
 
<------>/* enable workarounds, unless strict ACPI spec. compliance */
<------>if (!acpi_strict)
<------><------>acpi_gbl_enable_interpreter_slack = TRUE;
 
<------>acpi_permanent_mmap = true;
 
#ifdef CONFIG_X86
<------>/*
<------> * If the machine falls into the DMI check table,
<------> * DSDT will be copied to memory.
<------> * Note that calling dmi_check_system() here on other architectures
<------> * would not be OK because only x86 initializes dmi early enough.
<------> * Thankfully only x86 systems need such quirks for now.
<------> */
<------>dmi_check_system(dsdt_dmi_table);
#endif
 
<------>status = acpi_reallocate_root_table();
<------>if (ACPI_FAILURE(status)) {
<------><------>printk(KERN_ERR PREFIX
<------><------>       "Unable to reallocate ACPI tables\n");
<------><------>goto error0;
<------>}
 
<------>status = acpi_initialize_subsystem();
<------>if (ACPI_FAILURE(status)) {
<------><------>printk(KERN_ERR PREFIX
<------><------>       "Unable to initialize the ACPI Interpreter\n");
<------><------>goto error0;
<------>}
 
#ifdef CONFIG_X86
<------>if (!acpi_ioapic) {
<------><------>/* compatible (0) means level (3) */
<------><------>if (!(acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)) {
<------><------><------>acpi_sci_flags &= ~ACPI_MADT_TRIGGER_MASK;
<------><------><------>acpi_sci_flags |= ACPI_MADT_TRIGGER_LEVEL;
<------><------>}
<------><------>/* Set PIC-mode SCI trigger type */
<------><------>acpi_pic_sci_set_trigger(acpi_gbl_FADT.sci_interrupt,
<------><------><------><------><------> (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2);
<------>} else {
<------><------>/*
<------><------> * now that acpi_gbl_FADT is initialized,
<------><------> * update it with result from INT_SRC_OVR parsing
<------><------> */
<------><------>acpi_gbl_FADT.sci_interrupt = acpi_sci_override_gsi;
<------>}
#endif
<------>return;
 
 error0:
<------>disable_acpi();
}
 
/**
 * acpi_subsystem_init - Finalize the early initialization of ACPI.
 *
 * Switch over the platform to the ACPI mode (if possible).
 *
 * Doing this too early is generally unsafe, but at the same time it needs to be
 * done before all things that really depend on ACPI.  The right spot appears to
 * be before finalizing the EFI initialization.
 */
void __init acpi_subsystem_init(void)
{
<------>acpi_status status;
 
<------>if (acpi_disabled)
<------><------>return;
 
<------>status = acpi_enable_subsystem(~ACPI_NO_ACPI_ENABLE);
<------>if (ACPI_FAILURE(status)) {
<------><------>printk(KERN_ERR PREFIX "Unable to enable ACPI\n");
<------><------>disable_acpi();
<------>} else {
<------><------>/*
<------><------> * If the system is using ACPI then we can be reasonably
<------><------> * confident that any regulators are managed by the firmware
<------><------> * so tell the regulator core it has everything it needs to
<------><------> * know.
<------><------> */
<------><------>regulator_has_full_constraints();
<------>}
}
 
static acpi_status acpi_bus_table_handler(u32 event, void *table, void *context)
{
<------>acpi_scan_table_handler(event, table, context);
 
<------>return acpi_sysfs_table_handler(event, table, context);
}
 
static int __init acpi_bus_init(void)
{
<------>int result;
<------>acpi_status status;
 
<------>acpi_os_initialize1();
 
<------>status = acpi_load_tables();
<------>if (ACPI_FAILURE(status)) {
<------><------>printk(KERN_ERR PREFIX
<------><------>       "Unable to load the System Description Tables\n");
<------><------>goto error1;
<------>}
 
<------>/*
<------> * ACPI 2.0 requires the EC driver to be loaded and work before the EC
<------> * device is found in the namespace.
<------> *
<------> * This is accomplished by looking for the ECDT table and getting the EC
<------> * parameters out of that.
<------> *
<------> * Do that before calling acpi_initialize_objects() which may trigger EC
<------> * address space accesses.
<------> */
<------>acpi_ec_ecdt_probe();
 
<------>status = acpi_enable_subsystem(ACPI_NO_ACPI_ENABLE);
<------>if (ACPI_FAILURE(status)) {
<------><------>printk(KERN_ERR PREFIX
<------><------>       "Unable to start the ACPI Interpreter\n");
<------><------>goto error1;
<------>}
 
<------>status = acpi_initialize_objects(ACPI_FULL_INITIALIZATION);
<------>if (ACPI_FAILURE(status)) {
<------><------>printk(KERN_ERR PREFIX "Unable to initialize ACPI objects\n");
<------><------>goto error1;
<------>}
 
<------>/* Set capability bits for _OSC under processor scope */
<------>acpi_early_processor_osc();
 
<------>/*
<------> * _OSC method may exist in module level code,
<------> * so it must be run after ACPI_FULL_INITIALIZATION
<------> */
<------>acpi_bus_osc_support();
 
<------>/*
<------> * _PDC control method may load dynamic SSDT tables,
<------> * and we need to install the table handler before that.
<------> */
<------>status = acpi_install_table_handler(acpi_bus_table_handler, NULL);
 
<------>acpi_sysfs_init();
 
<------>acpi_early_processor_set_pdc();
 
<------>/*
<------> * Maybe EC region is required at bus_scan/acpi_get_devices. So it
<------> * is necessary to enable it as early as possible.
<------> */
<------>acpi_ec_dsdt_probe();
 
<------>printk(KERN_INFO PREFIX "Interpreter enabled\n");
 
<------>/* Initialize sleep structures */
<------>acpi_sleep_init();
 
<------>/*
<------> * Get the system interrupt model and evaluate \_PIC.
<------> */
<------>result = acpi_bus_init_irq();
<------>if (result)
<------><------>goto error1;
 
<------>/*
<------> * Register the for all standard device notifications.
<------> */
<------>status =
<------>    acpi_install_notify_handler(ACPI_ROOT_OBJECT, ACPI_SYSTEM_NOTIFY,
<------><------><------><------><------>&acpi_bus_notify, NULL);
<------>if (ACPI_FAILURE(status)) {
<------><------>printk(KERN_ERR PREFIX
<------><------>       "Unable to register for device notifications\n");
<------><------>goto error1;
<------>}
 
<------>/*
<------> * Create the top ACPI proc directory
<------> */
<------>acpi_root_dir = proc_mkdir(ACPI_BUS_FILE_ROOT, NULL);
 
<------>result = bus_register(&acpi_bus_type);
<------>if (!result)
<------><------>return 0;
 
<------>/* Mimic structured exception handling */
      error1:
<------>acpi_terminate();
<------>return -ENODEV;
}
 
struct kobject *acpi_kobj;
EXPORT_SYMBOL_GPL(acpi_kobj);
 
static int __init acpi_init(void)
{
<------>int result;
 
<------>if (acpi_disabled) {
<------><------>printk(KERN_INFO PREFIX "Interpreter disabled.\n");
<------><------>return -ENODEV;
<------>}
 
<------>acpi_kobj = kobject_create_and_add("acpi", firmware_kobj);
<------>if (!acpi_kobj) {
<------><------>printk(KERN_WARNING "%s: kset create error\n", __func__);
<------><------>acpi_kobj = NULL;
<------>}
 
<------>result = acpi_bus_init();
<------>if (result) {
<------><------>kobject_put(acpi_kobj);
<------><------>disable_acpi();
<------><------>return result;
<------>}
 
<------>pci_mmcfg_late_init();
<------>acpi_iort_init();
<------>acpi_scan_init();
<------>acpi_ec_init();
<------>acpi_debugfs_init();
<------>acpi_sleep_proc_init();
<------>acpi_wakeup_device_init();
<------>acpi_debugger_init();
<------>acpi_setup_sb_notify_handler();
<------>return 0;
}
 
subsys_initcall(acpi_init);