You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
303 lines
7.3 KiB
303 lines
7.3 KiB
/*
|
|
* 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/types.h>
|
|
#include <linux/acpi.h>
|
|
#include <acpi/acpi_bus.h>
|
|
#include <acpi/acpi_drivers.h>
|
|
#include <acpi/container.h>
|
|
|
|
#define ACPI_CONTAINER_DRIVER_NAME "ACPI container driver"
|
|
#define ACPI_CONTAINER_DEVICE_NAME "ACPI container device"
|
|
#define ACPI_CONTAINER_CLASS "container"
|
|
|
|
#define INSTALL_NOTIFY_HANDLER 1
|
|
#define UNINSTALL_NOTIFY_HANDLER 2
|
|
|
|
#define ACPI_CONTAINER_COMPONENT 0x01000000
|
|
#define _COMPONENT ACPI_CONTAINER_COMPONENT
|
|
ACPI_MODULE_NAME ("acpi_container")
|
|
|
|
MODULE_AUTHOR("Anil S Keshavamurthy");
|
|
MODULE_DESCRIPTION(ACPI_CONTAINER_DRIVER_NAME);
|
|
MODULE_LICENSE("GPL");
|
|
|
|
#define ACPI_STA_PRESENT (0x00000001)
|
|
|
|
static int acpi_container_add(struct acpi_device *device);
|
|
static int acpi_container_remove(struct acpi_device *device, int type);
|
|
|
|
static struct acpi_driver acpi_container_driver = {
|
|
.name = ACPI_CONTAINER_DRIVER_NAME,
|
|
.class = ACPI_CONTAINER_CLASS,
|
|
.ids = "ACPI0004,PNP0A05,PNP0A06",
|
|
.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 sta;
|
|
|
|
ACPI_FUNCTION_TRACE("is_device_present");
|
|
|
|
status = acpi_get_handle(handle, "_STA", &temp);
|
|
if (ACPI_FAILURE(status))
|
|
return_VALUE(1); /* _STA not found, assmue device present */
|
|
|
|
status = acpi_evaluate_integer(handle, "_STA", NULL, &sta);
|
|
if (ACPI_FAILURE(status))
|
|
return_VALUE(0); /* Firmware error */
|
|
|
|
return_VALUE((sta & ACPI_STA_PRESENT) == ACPI_STA_PRESENT);
|
|
}
|
|
|
|
/*******************************************************************/
|
|
static int
|
|
acpi_container_add(struct acpi_device *device)
|
|
{
|
|
struct acpi_container *container;
|
|
|
|
ACPI_FUNCTION_TRACE("acpi_container_add");
|
|
|
|
if (!device) {
|
|
ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "device is NULL\n"));
|
|
return_VALUE(-EINVAL);
|
|
}
|
|
|
|
container = kmalloc(sizeof(struct acpi_container), GFP_KERNEL);
|
|
if(!container)
|
|
return_VALUE(-ENOMEM);
|
|
|
|
memset(container, 0, sizeof(struct acpi_container));
|
|
container->handle = device->handle;
|
|
strcpy(acpi_device_name(device), ACPI_CONTAINER_DEVICE_NAME);
|
|
strcpy(acpi_device_class(device), ACPI_CONTAINER_CLASS);
|
|
acpi_driver_data(device) = container;
|
|
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device <%s> bid <%s>\n", \
|
|
acpi_device_name(device), acpi_device_bid(device)));
|
|
|
|
|
|
return_VALUE(0);
|
|
}
|
|
|
|
static int
|
|
acpi_container_remove(struct acpi_device *device, int type)
|
|
{
|
|
acpi_status status = AE_OK;
|
|
struct acpi_container *pc = NULL;
|
|
pc = (struct acpi_container*) acpi_driver_data(device);
|
|
|
|
if (pc)
|
|
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;
|
|
|
|
ACPI_FUNCTION_TRACE("container_device_add");
|
|
|
|
if (acpi_get_parent(handle, &phandle)) {
|
|
return_VALUE(-ENODEV);
|
|
}
|
|
|
|
if (acpi_bus_get_device(phandle, &pdev)) {
|
|
return_VALUE(-ENODEV);
|
|
}
|
|
|
|
if (acpi_bus_add(device, pdev, handle, ACPI_BUS_TYPE_DEVICE)) {
|
|
return_VALUE(-ENODEV);
|
|
}
|
|
|
|
result = acpi_bus_start(*device);
|
|
|
|
return_VALUE(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;
|
|
|
|
ACPI_FUNCTION_TRACE("container_notify_cb");
|
|
|
|
present = is_device_present(handle);
|
|
|
|
switch (type) {
|
|
case ACPI_NOTIFY_BUS_CHECK:
|
|
/* Fall through */
|
|
case ACPI_NOTIFY_DEVICE_CHECK:
|
|
printk("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_hotplug(&device->kobj,
|
|
KOBJ_ONLINE);
|
|
else
|
|
printk("Failed to add container\n");
|
|
}
|
|
} else {
|
|
if (ACPI_SUCCESS(status)) {
|
|
/* device exist and this is a remove request */
|
|
kobject_hotplug(&device->kobj, KOBJ_OFFLINE);
|
|
}
|
|
}
|
|
break;
|
|
case ACPI_NOTIFY_EJECT_REQUEST:
|
|
if (!acpi_bus_get_device(handle, &device) && device) {
|
|
kobject_hotplug(&device->kobj, KOBJ_OFFLINE);
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
return_VOID;
|
|
}
|
|
|
|
static acpi_status
|
|
container_walk_namespace_cb(acpi_handle handle,
|
|
u32 lvl,
|
|
void *context,
|
|
void **rv)
|
|
{
|
|
char *hid = NULL;
|
|
struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
|
|
struct acpi_device_info *info;
|
|
acpi_status status;
|
|
int *action = context;
|
|
|
|
ACPI_FUNCTION_TRACE("container_walk_namespace_cb");
|
|
|
|
status = acpi_get_object_info(handle, &buffer);
|
|
if (ACPI_FAILURE(status) || !buffer.pointer) {
|
|
return_ACPI_STATUS(AE_OK);
|
|
}
|
|
|
|
info = buffer.pointer;
|
|
if (info->valid & ACPI_VALID_HID)
|
|
hid = info->hardware_id.value;
|
|
|
|
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:
|
|
acpi_os_free(buffer.pointer);
|
|
|
|
return_ACPI_STATUS(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,
|
|
&action, NULL);
|
|
|
|
return(0);
|
|
}
|
|
|
|
static void __exit
|
|
acpi_container_exit(void)
|
|
{
|
|
int action = UNINSTALL_NOTIFY_HANDLER;
|
|
|
|
ACPI_FUNCTION_TRACE("acpi_container_exit");
|
|
|
|
acpi_walk_namespace(ACPI_TYPE_DEVICE,
|
|
ACPI_ROOT_OBJECT,
|
|
ACPI_UINT32_MAX,
|
|
container_walk_namespace_cb,
|
|
&action, NULL);
|
|
|
|
acpi_bus_unregister_driver(&acpi_container_driver);
|
|
|
|
return_VOID;
|
|
}
|
|
|
|
module_init(acpi_container_init);
|
|
module_exit(acpi_container_exit);
|
|
|