[T106][ZXW-22]7520V3SCV2.01.01.02P42U09_VEC_V0.8_AP_VEC origin source commit
Change-Id: Ic6e05d89ecd62fc34f82b23dcf306c93764aec4b
diff --git a/ap/os/linux/linux-3.4.x/drivers/acpi/glue.c b/ap/os/linux/linux-3.4.x/drivers/acpi/glue.c
new file mode 100644
index 0000000..29a4a5c
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/acpi/glue.c
@@ -0,0 +1,258 @@
+/*
+ * Link physical devices with ACPI devices support
+ *
+ * Copyright (c) 2005 David Shaohua Li <shaohua.li@intel.com>
+ * Copyright (c) 2005 Intel Corp.
+ *
+ * This file is released under the GPLv2.
+ */
+#include <linux/export.h>
+#include <linux/init.h>
+#include <linux/list.h>
+#include <linux/device.h>
+#include <linux/slab.h>
+#include <linux/rwsem.h>
+#include <linux/acpi.h>
+
+#include "internal.h"
+
+#define ACPI_GLUE_DEBUG 0
+#if ACPI_GLUE_DEBUG
+#define DBG(x...) printk(PREFIX x)
+#else
+#define DBG(x...) do { } while(0)
+#endif
+static LIST_HEAD(bus_type_list);
+static DECLARE_RWSEM(bus_type_sem);
+
+int register_acpi_bus_type(struct acpi_bus_type *type)
+{
+ if (acpi_disabled)
+ return -ENODEV;
+ if (type && type->bus && type->find_device) {
+ down_write(&bus_type_sem);
+ list_add_tail(&type->list, &bus_type_list);
+ up_write(&bus_type_sem);
+ printk(KERN_INFO PREFIX "bus type %s registered\n",
+ type->bus->name);
+ return 0;
+ }
+ return -ENODEV;
+}
+
+int unregister_acpi_bus_type(struct acpi_bus_type *type)
+{
+ if (acpi_disabled)
+ return 0;
+ if (type) {
+ down_write(&bus_type_sem);
+ list_del_init(&type->list);
+ up_write(&bus_type_sem);
+ printk(KERN_INFO PREFIX "ACPI bus type %s unregistered\n",
+ type->bus->name);
+ return 0;
+ }
+ return -ENODEV;
+}
+
+static struct acpi_bus_type *acpi_get_bus_type(struct bus_type *type)
+{
+ struct acpi_bus_type *tmp, *ret = NULL;
+
+ down_read(&bus_type_sem);
+ list_for_each_entry(tmp, &bus_type_list, list) {
+ if (tmp->bus == type) {
+ ret = tmp;
+ break;
+ }
+ }
+ up_read(&bus_type_sem);
+ return ret;
+}
+
+static int acpi_find_bridge_device(struct device *dev, acpi_handle * handle)
+{
+ struct acpi_bus_type *tmp;
+ int ret = -ENODEV;
+
+ down_read(&bus_type_sem);
+ list_for_each_entry(tmp, &bus_type_list, list) {
+ if (tmp->find_bridge && !tmp->find_bridge(dev, handle)) {
+ ret = 0;
+ break;
+ }
+ }
+ up_read(&bus_type_sem);
+ return ret;
+}
+
+/* Get device's handler per its address under its parent */
+struct acpi_find_child {
+ acpi_handle handle;
+ u64 address;
+};
+
+static acpi_status
+do_acpi_find_child(acpi_handle handle, u32 lvl, void *context, void **rv)
+{
+ acpi_status status;
+ struct acpi_device_info *info;
+ struct acpi_find_child *find = context;
+
+ status = acpi_get_object_info(handle, &info);
+ if (ACPI_SUCCESS(status)) {
+ if ((info->address == find->address)
+ && (info->valid & ACPI_VALID_ADR))
+ find->handle = handle;
+ kfree(info);
+ }
+ return AE_OK;
+}
+
+acpi_handle acpi_get_child(acpi_handle parent, u64 address)
+{
+ struct acpi_find_child find = { NULL, address };
+
+ if (!parent)
+ return NULL;
+ acpi_walk_namespace(ACPI_TYPE_DEVICE, parent,
+ 1, do_acpi_find_child, NULL, &find, NULL);
+ return find.handle;
+}
+
+EXPORT_SYMBOL(acpi_get_child);
+
+/* Link ACPI devices with physical devices */
+static void acpi_glue_data_handler(acpi_handle handle,
+ void *context)
+{
+ /* we provide an empty handler */
+}
+
+/* Note: a success call will increase reference count by one */
+struct device *acpi_get_physical_device(acpi_handle handle)
+{
+ acpi_status status;
+ struct device *dev;
+
+ status = acpi_get_data(handle, acpi_glue_data_handler, (void **)&dev);
+ if (ACPI_SUCCESS(status))
+ return get_device(dev);
+ return NULL;
+}
+
+EXPORT_SYMBOL(acpi_get_physical_device);
+
+static int acpi_bind_one(struct device *dev, acpi_handle handle)
+{
+ struct acpi_device *acpi_dev;
+ acpi_status status;
+
+ if (dev->archdata.acpi_handle) {
+ dev_warn(dev, "Drivers changed 'acpi_handle'\n");
+ return -EINVAL;
+ }
+ get_device(dev);
+ status = acpi_attach_data(handle, acpi_glue_data_handler, dev);
+ if (ACPI_FAILURE(status)) {
+ put_device(dev);
+ return -EINVAL;
+ }
+ dev->archdata.acpi_handle = handle;
+
+ status = acpi_bus_get_device(handle, &acpi_dev);
+ if (!ACPI_FAILURE(status)) {
+ int ret;
+
+ ret = sysfs_create_link(&dev->kobj, &acpi_dev->dev.kobj,
+ "firmware_node");
+ ret = sysfs_create_link(&acpi_dev->dev.kobj, &dev->kobj,
+ "physical_node");
+ if (acpi_dev->wakeup.flags.valid)
+ device_set_wakeup_capable(dev, true);
+ }
+
+ return 0;
+}
+
+static int acpi_unbind_one(struct device *dev)
+{
+ if (!dev->archdata.acpi_handle)
+ return 0;
+ if (dev == acpi_get_physical_device(dev->archdata.acpi_handle)) {
+ struct acpi_device *acpi_dev;
+
+ /* acpi_get_physical_device increase refcnt by one */
+ put_device(dev);
+
+ if (!acpi_bus_get_device(dev->archdata.acpi_handle,
+ &acpi_dev)) {
+ sysfs_remove_link(&dev->kobj, "firmware_node");
+ sysfs_remove_link(&acpi_dev->dev.kobj, "physical_node");
+ }
+
+ acpi_detach_data(dev->archdata.acpi_handle,
+ acpi_glue_data_handler);
+ dev->archdata.acpi_handle = NULL;
+ /* acpi_bind_one increase refcnt by one */
+ put_device(dev);
+ } else {
+ dev_err(dev, "Oops, 'acpi_handle' corrupt\n");
+ }
+ return 0;
+}
+
+static int acpi_platform_notify(struct device *dev)
+{
+ struct acpi_bus_type *type;
+ acpi_handle handle;
+ int ret = -EINVAL;
+
+ if (!dev->bus || !dev->parent) {
+ /* bridge devices genernally haven't bus or parent */
+ ret = acpi_find_bridge_device(dev, &handle);
+ goto end;
+ }
+ type = acpi_get_bus_type(dev->bus);
+ if (!type) {
+ DBG("No ACPI bus support for %s\n", dev_name(dev));
+ ret = -EINVAL;
+ goto end;
+ }
+ if ((ret = type->find_device(dev, &handle)) != 0)
+ DBG("Can't get handler for %s\n", dev_name(dev));
+ end:
+ if (!ret)
+ acpi_bind_one(dev, handle);
+
+#if ACPI_GLUE_DEBUG
+ if (!ret) {
+ struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
+
+ acpi_get_name(dev->archdata.acpi_handle,
+ ACPI_FULL_PATHNAME, &buffer);
+ DBG("Device %s -> %s\n", dev_name(dev), (char *)buffer.pointer);
+ kfree(buffer.pointer);
+ } else
+ DBG("Device %s -> No ACPI support\n", dev_name(dev));
+#endif
+
+ return ret;
+}
+
+static int acpi_platform_notify_remove(struct device *dev)
+{
+ acpi_unbind_one(dev);
+ return 0;
+}
+
+int __init init_acpi_device_notify(void)
+{
+ if (platform_notify || platform_notify_remove) {
+ printk(KERN_ERR PREFIX "Can't use platform_notify\n");
+ return 0;
+ }
+ platform_notify = acpi_platform_notify;
+ platform_notify_remove = acpi_platform_notify_remove;
+ return 0;
+}