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-rw-r--r--drivers/acpi/ac.c354
1 files changed, 354 insertions, 0 deletions
diff --git a/drivers/acpi/ac.c b/drivers/acpi/ac.c
new file mode 100644
index 00000000000..23ab761dd72
--- /dev/null
+++ b/drivers/acpi/ac.c
@@ -0,0 +1,354 @@
+/*
+ * acpi_ac.c - ACPI AC Adapter Driver ($Revision: 27 $)
+ *
+ * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
+ * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ * 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/proc_fs.h>
+#include <linux/seq_file.h>
+#include <acpi/acpi_bus.h>
+#include <acpi/acpi_drivers.h>
+
+
+#define ACPI_AC_COMPONENT 0x00020000
+#define ACPI_AC_CLASS "ac_adapter"
+#define ACPI_AC_HID "ACPI0003"
+#define ACPI_AC_DRIVER_NAME "ACPI AC Adapter Driver"
+#define ACPI_AC_DEVICE_NAME "AC Adapter"
+#define ACPI_AC_FILE_STATE "state"
+#define ACPI_AC_NOTIFY_STATUS 0x80
+#define ACPI_AC_STATUS_OFFLINE 0x00
+#define ACPI_AC_STATUS_ONLINE 0x01
+#define ACPI_AC_STATUS_UNKNOWN 0xFF
+
+#define _COMPONENT ACPI_AC_COMPONENT
+ACPI_MODULE_NAME ("acpi_ac")
+
+MODULE_AUTHOR("Paul Diefenbaugh");
+MODULE_DESCRIPTION(ACPI_AC_DRIVER_NAME);
+MODULE_LICENSE("GPL");
+
+static int acpi_ac_add (struct acpi_device *device);
+static int acpi_ac_remove (struct acpi_device *device, int type);
+static int acpi_ac_open_fs(struct inode *inode, struct file *file);
+
+static struct acpi_driver acpi_ac_driver = {
+ .name = ACPI_AC_DRIVER_NAME,
+ .class = ACPI_AC_CLASS,
+ .ids = ACPI_AC_HID,
+ .ops = {
+ .add = acpi_ac_add,
+ .remove = acpi_ac_remove,
+ },
+};
+
+struct acpi_ac {
+ acpi_handle handle;
+ unsigned long state;
+};
+
+static struct file_operations acpi_ac_fops = {
+ .open = acpi_ac_open_fs,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+/* --------------------------------------------------------------------------
+ AC Adapter Management
+ -------------------------------------------------------------------------- */
+
+static int
+acpi_ac_get_state (
+ struct acpi_ac *ac)
+{
+ acpi_status status = AE_OK;
+
+ ACPI_FUNCTION_TRACE("acpi_ac_get_state");
+
+ if (!ac)
+ return_VALUE(-EINVAL);
+
+ status = acpi_evaluate_integer(ac->handle, "_PSR", NULL, &ac->state);
+ if (ACPI_FAILURE(status)) {
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
+ "Error reading AC Adapter state\n"));
+ ac->state = ACPI_AC_STATUS_UNKNOWN;
+ return_VALUE(-ENODEV);
+ }
+
+ return_VALUE(0);
+}
+
+
+/* --------------------------------------------------------------------------
+ FS Interface (/proc)
+ -------------------------------------------------------------------------- */
+
+static struct proc_dir_entry *acpi_ac_dir;
+
+static int acpi_ac_seq_show(struct seq_file *seq, void *offset)
+{
+ struct acpi_ac *ac = (struct acpi_ac *) seq->private;
+
+ ACPI_FUNCTION_TRACE("acpi_ac_seq_show");
+
+ if (!ac)
+ return_VALUE(0);
+
+ if (acpi_ac_get_state(ac)) {
+ seq_puts(seq, "ERROR: Unable to read AC Adapter state\n");
+ return_VALUE(0);
+ }
+
+ seq_puts(seq, "state: ");
+ switch (ac->state) {
+ case ACPI_AC_STATUS_OFFLINE:
+ seq_puts(seq, "off-line\n");
+ break;
+ case ACPI_AC_STATUS_ONLINE:
+ seq_puts(seq, "on-line\n");
+ break;
+ default:
+ seq_puts(seq, "unknown\n");
+ break;
+ }
+
+ return_VALUE(0);
+}
+
+static int acpi_ac_open_fs(struct inode *inode, struct file *file)
+{
+ return single_open(file, acpi_ac_seq_show, PDE(inode)->data);
+}
+
+static int
+acpi_ac_add_fs (
+ struct acpi_device *device)
+{
+ struct proc_dir_entry *entry = NULL;
+
+ ACPI_FUNCTION_TRACE("acpi_ac_add_fs");
+
+ if (!acpi_device_dir(device)) {
+ acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
+ acpi_ac_dir);
+ if (!acpi_device_dir(device))
+ return_VALUE(-ENODEV);
+ acpi_device_dir(device)->owner = THIS_MODULE;
+ }
+
+ /* 'state' [R] */
+ entry = create_proc_entry(ACPI_AC_FILE_STATE,
+ S_IRUGO, acpi_device_dir(device));
+ if (!entry)
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
+ "Unable to create '%s' fs entry\n",
+ ACPI_AC_FILE_STATE));
+ else {
+ entry->proc_fops = &acpi_ac_fops;
+ entry->data = acpi_driver_data(device);
+ entry->owner = THIS_MODULE;
+ }
+
+ return_VALUE(0);
+}
+
+
+static int
+acpi_ac_remove_fs (
+ struct acpi_device *device)
+{
+ ACPI_FUNCTION_TRACE("acpi_ac_remove_fs");
+
+ if (acpi_device_dir(device)) {
+ remove_proc_entry(ACPI_AC_FILE_STATE,
+ acpi_device_dir(device));
+
+ remove_proc_entry(acpi_device_bid(device), acpi_ac_dir);
+ acpi_device_dir(device) = NULL;
+ }
+
+ return_VALUE(0);
+}
+
+
+/* --------------------------------------------------------------------------
+ Driver Model
+ -------------------------------------------------------------------------- */
+
+static void
+acpi_ac_notify (
+ acpi_handle handle,
+ u32 event,
+ void *data)
+{
+ struct acpi_ac *ac = (struct acpi_ac *) data;
+ struct acpi_device *device = NULL;
+
+ ACPI_FUNCTION_TRACE("acpi_ac_notify");
+
+ if (!ac)
+ return_VOID;
+
+ if (acpi_bus_get_device(ac->handle, &device))
+ return_VOID;
+
+ switch (event) {
+ case ACPI_AC_NOTIFY_STATUS:
+ acpi_ac_get_state(ac);
+ acpi_bus_generate_event(device, event, (u32) ac->state);
+ break;
+ default:
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO,
+ "Unsupported event [0x%x]\n", event));
+ break;
+ }
+
+ return_VOID;
+}
+
+
+static int
+acpi_ac_add (
+ struct acpi_device *device)
+{
+ int result = 0;
+ acpi_status status = AE_OK;
+ struct acpi_ac *ac = NULL;
+
+ ACPI_FUNCTION_TRACE("acpi_ac_add");
+
+ if (!device)
+ return_VALUE(-EINVAL);
+
+ ac = kmalloc(sizeof(struct acpi_ac), GFP_KERNEL);
+ if (!ac)
+ return_VALUE(-ENOMEM);
+ memset(ac, 0, sizeof(struct acpi_ac));
+
+ ac->handle = device->handle;
+ strcpy(acpi_device_name(device), ACPI_AC_DEVICE_NAME);
+ strcpy(acpi_device_class(device), ACPI_AC_CLASS);
+ acpi_driver_data(device) = ac;
+
+ result = acpi_ac_get_state(ac);
+ if (result)
+ goto end;
+
+ result = acpi_ac_add_fs(device);
+ if (result)
+ goto end;
+
+ status = acpi_install_notify_handler(ac->handle,
+ ACPI_DEVICE_NOTIFY, acpi_ac_notify, ac);
+ if (ACPI_FAILURE(status)) {
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
+ "Error installing notify handler\n"));
+ result = -ENODEV;
+ goto end;
+ }
+
+ printk(KERN_INFO PREFIX "%s [%s] (%s)\n",
+ acpi_device_name(device), acpi_device_bid(device),
+ ac->state?"on-line":"off-line");
+
+end:
+ if (result) {
+ acpi_ac_remove_fs(device);
+ kfree(ac);
+ }
+
+ return_VALUE(result);
+}
+
+
+static int
+acpi_ac_remove (
+ struct acpi_device *device,
+ int type)
+{
+ acpi_status status = AE_OK;
+ struct acpi_ac *ac = NULL;
+
+ ACPI_FUNCTION_TRACE("acpi_ac_remove");
+
+ if (!device || !acpi_driver_data(device))
+ return_VALUE(-EINVAL);
+
+ ac = (struct acpi_ac *) acpi_driver_data(device);
+
+ status = acpi_remove_notify_handler(ac->handle,
+ ACPI_DEVICE_NOTIFY, acpi_ac_notify);
+ if (ACPI_FAILURE(status))
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
+ "Error removing notify handler\n"));
+
+ acpi_ac_remove_fs(device);
+
+ kfree(ac);
+
+ return_VALUE(0);
+}
+
+
+static int __init
+acpi_ac_init (void)
+{
+ int result = 0;
+
+ ACPI_FUNCTION_TRACE("acpi_ac_init");
+
+ acpi_ac_dir = proc_mkdir(ACPI_AC_CLASS, acpi_root_dir);
+ if (!acpi_ac_dir)
+ return_VALUE(-ENODEV);
+ acpi_ac_dir->owner = THIS_MODULE;
+
+ result = acpi_bus_register_driver(&acpi_ac_driver);
+ if (result < 0) {
+ remove_proc_entry(ACPI_AC_CLASS, acpi_root_dir);
+ return_VALUE(-ENODEV);
+ }
+
+ return_VALUE(0);
+}
+
+
+static void __exit
+acpi_ac_exit (void)
+{
+ ACPI_FUNCTION_TRACE("acpi_ac_exit");
+
+ acpi_bus_unregister_driver(&acpi_ac_driver);
+
+ remove_proc_entry(ACPI_AC_CLASS, acpi_root_dir);
+
+ return_VOID;
+}
+
+
+module_init(acpi_ac_init);
+module_exit(acpi_ac_exit);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-01 01:57:28 +0000