zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/os/linux/linux-3.4.x/drivers/acpi/container.c b/ap/os/linux/linux-3.4.x/drivers/acpi/container.c
new file mode 100644
index 0000000..45cd03b
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/acpi/container.c
@@ -0,0 +1,283 @@
+/*
+ * acpi_container.c - ACPI Generic Container Driver
+ * ($Revision: )
+ *
+ * Copyright (C) 2004 Anil S Keshavamurthy (anil.s.keshavamurthy@intel.com)
+ * Copyright (C) 2004 Keiichiro Tokunaga (tokunaga.keiich@jp.fujitsu.com)
+ * Copyright (C) 2004 Motoyuki Ito (motoyuki@soft.fujitsu.com)
+ * Copyright (C) 2004 Intel Corp.
+ * Copyright (C) 2004 FUJITSU LIMITED
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ * 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/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/types.h>
+#include <linux/acpi.h>
+#include <acpi/acpi_bus.h>
+#include <acpi/acpi_drivers.h>
+#include <acpi/container.h>
+
+#define PREFIX "ACPI: "
+
+#define ACPI_CONTAINER_DEVICE_NAME "ACPI container device"
+#define ACPI_CONTAINER_CLASS "container"
+
+#define INSTALL_NOTIFY_HANDLER 1
+#define UNINSTALL_NOTIFY_HANDLER 2
+
+#define _COMPONENT ACPI_CONTAINER_COMPONENT
+ACPI_MODULE_NAME("container");
+
+MODULE_AUTHOR("Anil S Keshavamurthy");
+MODULE_DESCRIPTION("ACPI container driver");
+MODULE_LICENSE("GPL");
+
+static int acpi_container_add(struct acpi_device *device);
+static int acpi_container_remove(struct acpi_device *device, int type);
+
+static const struct acpi_device_id container_device_ids[] = {
+ {"ACPI0004", 0},
+ {"PNP0A05", 0},
+ {"PNP0A06", 0},
+ {"", 0},
+};
+MODULE_DEVICE_TABLE(acpi, container_device_ids);
+
+static struct acpi_driver acpi_container_driver = {
+ .name = "container",
+ .class = ACPI_CONTAINER_CLASS,
+ .ids = container_device_ids,
+ .ops = {
+ .add = acpi_container_add,
+ .remove = acpi_container_remove,
+ },
+};
+
+/*******************************************************************/
+
+static int is_device_present(acpi_handle handle)
+{
+ acpi_handle temp;
+ acpi_status status;
+ unsigned long long sta;
+
+
+ status = acpi_get_handle(handle, "_STA", &temp);
+ if (ACPI_FAILURE(status))
+ return 1; /* _STA not found, assume device present */
+
+ status = acpi_evaluate_integer(handle, "_STA", NULL, &sta);
+ if (ACPI_FAILURE(status))
+ return 0; /* Firmware error */
+
+ return ((sta & ACPI_STA_DEVICE_PRESENT) == ACPI_STA_DEVICE_PRESENT);
+}
+
+/*******************************************************************/
+static int acpi_container_add(struct acpi_device *device)
+{
+ struct acpi_container *container;
+
+
+ if (!device) {
+ printk(KERN_ERR PREFIX "device is NULL\n");
+ return -EINVAL;
+ }
+
+ container = kzalloc(sizeof(struct acpi_container), GFP_KERNEL);
+ if (!container)
+ return -ENOMEM;
+
+ container->handle = device->handle;
+ strcpy(acpi_device_name(device), ACPI_CONTAINER_DEVICE_NAME);
+ strcpy(acpi_device_class(device), ACPI_CONTAINER_CLASS);
+ device->driver_data = container;
+
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device <%s> bid <%s>\n",
+ acpi_device_name(device), acpi_device_bid(device)));
+
+ return 0;
+}
+
+static int acpi_container_remove(struct acpi_device *device, int type)
+{
+ acpi_status status = AE_OK;
+ struct acpi_container *pc = NULL;
+
+ pc = acpi_driver_data(device);
+ kfree(pc);
+ return status;
+}
+
+static int container_device_add(struct acpi_device **device, acpi_handle handle)
+{
+ acpi_handle phandle;
+ struct acpi_device *pdev;
+ int result;
+
+
+ if (acpi_get_parent(handle, &phandle)) {
+ return -ENODEV;
+ }
+
+ if (acpi_bus_get_device(phandle, &pdev)) {
+ return -ENODEV;
+ }
+
+ if (acpi_bus_add(device, pdev, handle, ACPI_BUS_TYPE_DEVICE)) {
+ return -ENODEV;
+ }
+
+ result = acpi_bus_start(*device);
+
+ return result;
+}
+
+static void container_notify_cb(acpi_handle handle, u32 type, void *context)
+{
+ struct acpi_device *device = NULL;
+ int result;
+ int present;
+ acpi_status status;
+
+
+ present = is_device_present(handle);
+
+ switch (type) {
+ case ACPI_NOTIFY_BUS_CHECK:
+ /* Fall through */
+ case ACPI_NOTIFY_DEVICE_CHECK:
+ printk(KERN_WARNING "Container driver received %s event\n",
+ (type == ACPI_NOTIFY_BUS_CHECK) ?
+ "ACPI_NOTIFY_BUS_CHECK" : "ACPI_NOTIFY_DEVICE_CHECK");
+ status = acpi_bus_get_device(handle, &device);
+ if (present) {
+ if (ACPI_FAILURE(status) || !device) {
+ result = container_device_add(&device, handle);
+ if (!result)
+ kobject_uevent(&device->dev.kobj,
+ KOBJ_ONLINE);
+ else
+ printk(KERN_WARNING
+ "Failed to add container\n");
+ }
+ } else {
+ if (ACPI_SUCCESS(status)) {
+ /* device exist and this is a remove request */
+ kobject_uevent(&device->dev.kobj, KOBJ_OFFLINE);
+ }
+ }
+ break;
+ case ACPI_NOTIFY_EJECT_REQUEST:
+ if (!acpi_bus_get_device(handle, &device) && device) {
+ kobject_uevent(&device->dev.kobj, KOBJ_OFFLINE);
+ }
+ break;
+ default:
+ break;
+ }
+ return;
+}
+
+static acpi_status
+container_walk_namespace_cb(acpi_handle handle,
+ u32 lvl, void *context, void **rv)
+{
+ char *hid = NULL;
+ struct acpi_device_info *info;
+ acpi_status status;
+ int *action = context;
+
+ status = acpi_get_object_info(handle, &info);
+ if (ACPI_FAILURE(status)) {
+ return AE_OK;
+ }
+
+ if (info->valid & ACPI_VALID_HID)
+ hid = info->hardware_id.string;
+
+ if (hid == NULL) {
+ goto end;
+ }
+
+ if (strcmp(hid, "ACPI0004") && strcmp(hid, "PNP0A05") &&
+ strcmp(hid, "PNP0A06")) {
+ goto end;
+ }
+
+ switch (*action) {
+ case INSTALL_NOTIFY_HANDLER:
+ acpi_install_notify_handler(handle,
+ ACPI_SYSTEM_NOTIFY,
+ container_notify_cb, NULL);
+ break;
+ case UNINSTALL_NOTIFY_HANDLER:
+ acpi_remove_notify_handler(handle,
+ ACPI_SYSTEM_NOTIFY,
+ container_notify_cb);
+ break;
+ default:
+ break;
+ }
+
+ end:
+ kfree(info);
+
+ return AE_OK;
+}
+
+static int __init acpi_container_init(void)
+{
+ int result = 0;
+ int action = INSTALL_NOTIFY_HANDLER;
+
+ result = acpi_bus_register_driver(&acpi_container_driver);
+ if (result < 0) {
+ return (result);
+ }
+
+ /* register notify handler to every container device */
+ acpi_walk_namespace(ACPI_TYPE_DEVICE,
+ ACPI_ROOT_OBJECT,
+ ACPI_UINT32_MAX,
+ container_walk_namespace_cb, NULL, &action, NULL);
+
+ return (0);
+}
+
+static void __exit acpi_container_exit(void)
+{
+ int action = UNINSTALL_NOTIFY_HANDLER;
+
+
+ acpi_walk_namespace(ACPI_TYPE_DEVICE,
+ ACPI_ROOT_OBJECT,
+ ACPI_UINT32_MAX,
+ container_walk_namespace_cb, NULL, &action, NULL);
+
+ acpi_bus_unregister_driver(&acpi_container_driver);
+
+ return;
+}
+
+module_init(acpi_container_init);
+module_exit(acpi_container_exit);