![Len Brown](/assets/img/avatar_default.png)
Conflicts: Documentation/feature-removal-schedule.txt include/acpi/acpi_drivers.h Signed-off-by: Len Brown <len.brown@intel.com>
523 lines
14 KiB
C
523 lines
14 KiB
C
/*
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* acpi_button.c - ACPI Button Driver ($Revision: 30 $)
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*
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* Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
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* Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
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*
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or (at
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* your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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*
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/types.h>
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#include <linux/proc_fs.h>
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#include <linux/seq_file.h>
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#include <linux/input.h>
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#include <acpi/acpi_bus.h>
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#include <acpi/acpi_drivers.h>
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#define ACPI_BUTTON_COMPONENT 0x00080000
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#define ACPI_BUTTON_DRIVER_NAME "ACPI Button Driver"
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#define ACPI_BUTTON_CLASS "button"
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#define ACPI_BUTTON_FILE_INFO "info"
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#define ACPI_BUTTON_FILE_STATE "state"
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#define ACPI_BUTTON_TYPE_UNKNOWN 0x00
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#define ACPI_BUTTON_NOTIFY_STATUS 0x80
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#define ACPI_BUTTON_SUBCLASS_POWER "power"
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#define ACPI_BUTTON_HID_POWER "PNP0C0C"
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#define ACPI_BUTTON_DEVICE_NAME_POWER "Power Button (CM)"
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#define ACPI_BUTTON_DEVICE_NAME_POWERF "Power Button (FF)"
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#define ACPI_BUTTON_TYPE_POWER 0x01
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#define ACPI_BUTTON_TYPE_POWERF 0x02
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#define ACPI_BUTTON_SUBCLASS_SLEEP "sleep"
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#define ACPI_BUTTON_HID_SLEEP "PNP0C0E"
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#define ACPI_BUTTON_DEVICE_NAME_SLEEP "Sleep Button (CM)"
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#define ACPI_BUTTON_DEVICE_NAME_SLEEPF "Sleep Button (FF)"
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#define ACPI_BUTTON_TYPE_SLEEP 0x03
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#define ACPI_BUTTON_TYPE_SLEEPF 0x04
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#define ACPI_BUTTON_SUBCLASS_LID "lid"
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#define ACPI_BUTTON_HID_LID "PNP0C0D"
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#define ACPI_BUTTON_DEVICE_NAME_LID "Lid Switch"
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#define ACPI_BUTTON_TYPE_LID 0x05
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#define _COMPONENT ACPI_BUTTON_COMPONENT
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ACPI_MODULE_NAME("acpi_button")
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MODULE_AUTHOR("Paul Diefenbaugh");
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MODULE_DESCRIPTION(ACPI_BUTTON_DRIVER_NAME);
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MODULE_LICENSE("GPL");
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static int acpi_button_add(struct acpi_device *device);
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static int acpi_button_remove(struct acpi_device *device, int type);
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static int acpi_button_info_open_fs(struct inode *inode, struct file *file);
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static int acpi_button_state_open_fs(struct inode *inode, struct file *file);
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static struct acpi_driver acpi_button_driver = {
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.name = ACPI_BUTTON_DRIVER_NAME,
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.class = ACPI_BUTTON_CLASS,
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.ids = "button_power,button_sleep,PNP0C0D,PNP0C0C,PNP0C0E",
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.ops = {
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.add = acpi_button_add,
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.remove = acpi_button_remove,
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},
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};
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struct acpi_button {
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struct acpi_device *device; /* Fixed button kludge */
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unsigned int type;
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struct input_dev *input;
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char phys[32]; /* for input device */
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unsigned long pushed;
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};
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static const struct file_operations acpi_button_info_fops = {
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.open = acpi_button_info_open_fs,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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};
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static const struct file_operations acpi_button_state_fops = {
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.open = acpi_button_state_open_fs,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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};
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/* --------------------------------------------------------------------------
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FS Interface (/proc)
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-------------------------------------------------------------------------- */
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static struct proc_dir_entry *acpi_button_dir;
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static int acpi_button_info_seq_show(struct seq_file *seq, void *offset)
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{
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struct acpi_button *button = seq->private;
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if (!button || !button->device)
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return 0;
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seq_printf(seq, "type: %s\n",
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acpi_device_name(button->device));
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return 0;
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}
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static int acpi_button_info_open_fs(struct inode *inode, struct file *file)
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{
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return single_open(file, acpi_button_info_seq_show, PDE(inode)->data);
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}
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static int acpi_button_state_seq_show(struct seq_file *seq, void *offset)
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{
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struct acpi_button *button = seq->private;
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acpi_status status;
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unsigned long state;
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if (!button || !button->device)
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return 0;
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status = acpi_evaluate_integer(button->device->handle, "_LID", NULL, &state);
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seq_printf(seq, "state: %s\n",
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ACPI_FAILURE(status) ? "unsupported" :
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(state ? "open" : "closed"));
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return 0;
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}
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static int acpi_button_state_open_fs(struct inode *inode, struct file *file)
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{
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return single_open(file, acpi_button_state_seq_show, PDE(inode)->data);
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}
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static struct proc_dir_entry *acpi_power_dir;
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static struct proc_dir_entry *acpi_sleep_dir;
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static struct proc_dir_entry *acpi_lid_dir;
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static int acpi_button_add_fs(struct acpi_device *device)
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{
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struct proc_dir_entry *entry = NULL;
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struct acpi_button *button;
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if (!device || !acpi_driver_data(device))
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return -EINVAL;
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button = acpi_driver_data(device);
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switch (button->type) {
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case ACPI_BUTTON_TYPE_POWER:
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case ACPI_BUTTON_TYPE_POWERF:
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if (!acpi_power_dir)
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acpi_power_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_POWER,
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acpi_button_dir);
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entry = acpi_power_dir;
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break;
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case ACPI_BUTTON_TYPE_SLEEP:
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case ACPI_BUTTON_TYPE_SLEEPF:
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if (!acpi_sleep_dir)
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acpi_sleep_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_SLEEP,
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acpi_button_dir);
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entry = acpi_sleep_dir;
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break;
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case ACPI_BUTTON_TYPE_LID:
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if (!acpi_lid_dir)
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acpi_lid_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_LID,
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acpi_button_dir);
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entry = acpi_lid_dir;
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break;
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}
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if (!entry)
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return -ENODEV;
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entry->owner = THIS_MODULE;
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acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), entry);
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if (!acpi_device_dir(device))
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return -ENODEV;
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acpi_device_dir(device)->owner = THIS_MODULE;
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/* 'info' [R] */
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entry = create_proc_entry(ACPI_BUTTON_FILE_INFO,
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S_IRUGO, acpi_device_dir(device));
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if (!entry)
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return -ENODEV;
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else {
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entry->proc_fops = &acpi_button_info_fops;
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entry->data = acpi_driver_data(device);
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entry->owner = THIS_MODULE;
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}
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/* show lid state [R] */
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if (button->type == ACPI_BUTTON_TYPE_LID) {
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entry = create_proc_entry(ACPI_BUTTON_FILE_STATE,
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S_IRUGO, acpi_device_dir(device));
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if (!entry)
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return -ENODEV;
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else {
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entry->proc_fops = &acpi_button_state_fops;
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entry->data = acpi_driver_data(device);
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entry->owner = THIS_MODULE;
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}
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}
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return 0;
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}
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static int acpi_button_remove_fs(struct acpi_device *device)
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{
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struct acpi_button *button = acpi_driver_data(device);
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if (acpi_device_dir(device)) {
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if (button->type == ACPI_BUTTON_TYPE_LID)
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remove_proc_entry(ACPI_BUTTON_FILE_STATE,
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acpi_device_dir(device));
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remove_proc_entry(ACPI_BUTTON_FILE_INFO,
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acpi_device_dir(device));
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remove_proc_entry(acpi_device_bid(device),
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acpi_device_dir(device)->parent);
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acpi_device_dir(device) = NULL;
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}
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return 0;
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}
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/* --------------------------------------------------------------------------
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Driver Interface
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-------------------------------------------------------------------------- */
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static void acpi_button_notify(acpi_handle handle, u32 event, void *data)
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{
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struct acpi_button *button = data;
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struct input_dev *input;
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if (!button || !button->device)
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return;
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switch (event) {
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case ACPI_BUTTON_NOTIFY_STATUS:
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input = button->input;
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if (button->type == ACPI_BUTTON_TYPE_LID) {
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struct acpi_handle *handle = button->device->handle;
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unsigned long state;
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if (!ACPI_FAILURE(acpi_evaluate_integer(handle, "_LID",
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NULL, &state)))
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input_report_switch(input, SW_LID, !state);
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} else {
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int keycode = test_bit(KEY_SLEEP, input->keybit) ?
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KEY_SLEEP : KEY_POWER;
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input_report_key(input, keycode, 1);
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input_sync(input);
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input_report_key(input, keycode, 0);
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}
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input_sync(input);
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acpi_bus_generate_event(button->device, event,
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++button->pushed);
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break;
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default:
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ACPI_DEBUG_PRINT((ACPI_DB_INFO,
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"Unsupported event [0x%x]\n", event));
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break;
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}
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return;
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}
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static acpi_status acpi_button_notify_fixed(void *data)
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{
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struct acpi_button *button = data;
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if (!button)
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return AE_BAD_PARAMETER;
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acpi_button_notify(button->device->handle, ACPI_BUTTON_NOTIFY_STATUS, button);
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return AE_OK;
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}
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static int acpi_button_install_notify_handlers(struct acpi_button *button)
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{
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acpi_status status;
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switch (button->type) {
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case ACPI_BUTTON_TYPE_POWERF:
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status =
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acpi_install_fixed_event_handler(ACPI_EVENT_POWER_BUTTON,
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acpi_button_notify_fixed,
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button);
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break;
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case ACPI_BUTTON_TYPE_SLEEPF:
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status =
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acpi_install_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON,
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acpi_button_notify_fixed,
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button);
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break;
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default:
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status = acpi_install_notify_handler(button->device->handle,
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ACPI_DEVICE_NOTIFY,
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acpi_button_notify,
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button);
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break;
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}
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return ACPI_FAILURE(status) ? -ENODEV : 0;
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}
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static void acpi_button_remove_notify_handlers(struct acpi_button *button)
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{
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switch (button->type) {
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case ACPI_BUTTON_TYPE_POWERF:
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acpi_remove_fixed_event_handler(ACPI_EVENT_POWER_BUTTON,
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acpi_button_notify_fixed);
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break;
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case ACPI_BUTTON_TYPE_SLEEPF:
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acpi_remove_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON,
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acpi_button_notify_fixed);
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break;
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default:
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acpi_remove_notify_handler(button->device->handle,
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ACPI_DEVICE_NOTIFY,
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acpi_button_notify);
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break;
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}
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}
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static int acpi_button_add(struct acpi_device *device)
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{
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int error;
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struct acpi_button *button;
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struct input_dev *input;
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if (!device)
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return -EINVAL;
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button = kzalloc(sizeof(struct acpi_button), GFP_KERNEL);
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if (!button)
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return -ENOMEM;
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button->device = device;
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acpi_driver_data(device) = button;
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button->input = input = input_allocate_device();
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if (!input) {
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error = -ENOMEM;
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goto err_free_button;
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}
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/*
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* Determine the button type (via hid), as fixed-feature buttons
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* need to be handled a bit differently than generic-space.
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*/
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if (!strcmp(acpi_device_hid(device), ACPI_BUTTON_HID_POWER)) {
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button->type = ACPI_BUTTON_TYPE_POWER;
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strcpy(acpi_device_name(device), ACPI_BUTTON_DEVICE_NAME_POWER);
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sprintf(acpi_device_class(device), "%s/%s",
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ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_POWER);
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} else if (!strcmp(acpi_device_hid(device), ACPI_BUTTON_HID_POWERF)) {
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button->type = ACPI_BUTTON_TYPE_POWERF;
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strcpy(acpi_device_name(device),
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ACPI_BUTTON_DEVICE_NAME_POWERF);
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sprintf(acpi_device_class(device), "%s/%s",
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ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_POWER);
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} else if (!strcmp(acpi_device_hid(device), ACPI_BUTTON_HID_SLEEP)) {
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button->type = ACPI_BUTTON_TYPE_SLEEP;
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strcpy(acpi_device_name(device), ACPI_BUTTON_DEVICE_NAME_SLEEP);
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sprintf(acpi_device_class(device), "%s/%s",
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ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_SLEEP);
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} else if (!strcmp(acpi_device_hid(device), ACPI_BUTTON_HID_SLEEPF)) {
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button->type = ACPI_BUTTON_TYPE_SLEEPF;
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strcpy(acpi_device_name(device),
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ACPI_BUTTON_DEVICE_NAME_SLEEPF);
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sprintf(acpi_device_class(device), "%s/%s",
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ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_SLEEP);
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} else if (!strcmp(acpi_device_hid(device), ACPI_BUTTON_HID_LID)) {
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button->type = ACPI_BUTTON_TYPE_LID;
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strcpy(acpi_device_name(device), ACPI_BUTTON_DEVICE_NAME_LID);
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sprintf(acpi_device_class(device), "%s/%s",
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ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_LID);
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} else {
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printk(KERN_ERR PREFIX "Unsupported hid [%s]\n",
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acpi_device_hid(device));
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error = -ENODEV;
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goto err_free_input;
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}
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error = acpi_button_add_fs(device);
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if (error)
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goto err_free_input;
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error = acpi_button_install_notify_handlers(button);
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if (error)
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goto err_remove_fs;
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snprintf(button->phys, sizeof(button->phys),
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"%s/button/input0", acpi_device_hid(device));
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input->name = acpi_device_name(device);
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input->phys = button->phys;
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input->id.bustype = BUS_HOST;
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input->id.product = button->type;
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switch (button->type) {
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case ACPI_BUTTON_TYPE_POWER:
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case ACPI_BUTTON_TYPE_POWERF:
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input->evbit[0] = BIT(EV_KEY);
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set_bit(KEY_POWER, input->keybit);
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break;
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case ACPI_BUTTON_TYPE_SLEEP:
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case ACPI_BUTTON_TYPE_SLEEPF:
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input->evbit[0] = BIT(EV_KEY);
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set_bit(KEY_SLEEP, input->keybit);
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break;
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case ACPI_BUTTON_TYPE_LID:
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input->evbit[0] = BIT(EV_SW);
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set_bit(SW_LID, input->swbit);
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break;
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}
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error = input_register_device(input);
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if (error)
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goto err_remove_handlers;
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if (device->wakeup.flags.valid) {
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/* Button's GPE is run-wake GPE */
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acpi_set_gpe_type(device->wakeup.gpe_device,
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device->wakeup.gpe_number,
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ACPI_GPE_TYPE_WAKE_RUN);
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acpi_enable_gpe(device->wakeup.gpe_device,
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device->wakeup.gpe_number, ACPI_NOT_ISR);
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device->wakeup.state.enabled = 1;
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}
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printk(KERN_INFO PREFIX "%s [%s]\n",
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acpi_device_name(device), acpi_device_bid(device));
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return 0;
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err_remove_handlers:
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acpi_button_remove_notify_handlers(button);
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err_remove_fs:
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acpi_button_remove_fs(device);
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err_free_input:
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input_free_device(input);
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err_free_button:
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kfree(button);
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return error;
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}
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static int acpi_button_remove(struct acpi_device *device, int type)
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{
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struct acpi_button *button;
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if (!device || !acpi_driver_data(device))
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return -EINVAL;
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button = acpi_driver_data(device);
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acpi_button_remove_notify_handlers(button);
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acpi_button_remove_fs(device);
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input_unregister_device(button->input);
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kfree(button);
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return 0;
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}
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static int __init acpi_button_init(void)
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{
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int result;
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acpi_button_dir = proc_mkdir(ACPI_BUTTON_CLASS, acpi_root_dir);
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if (!acpi_button_dir)
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return -ENODEV;
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acpi_button_dir->owner = THIS_MODULE;
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result = acpi_bus_register_driver(&acpi_button_driver);
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if (result < 0) {
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remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir);
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return -ENODEV;
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}
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|
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return 0;
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}
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static void __exit acpi_button_exit(void)
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{
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|
acpi_bus_unregister_driver(&acpi_button_driver);
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|
|
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if (acpi_power_dir)
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remove_proc_entry(ACPI_BUTTON_SUBCLASS_POWER, acpi_button_dir);
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if (acpi_sleep_dir)
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remove_proc_entry(ACPI_BUTTON_SUBCLASS_SLEEP, acpi_button_dir);
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if (acpi_lid_dir)
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|
remove_proc_entry(ACPI_BUTTON_SUBCLASS_LID, acpi_button_dir);
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|
remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir);
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}
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|
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module_init(acpi_button_init);
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|
module_exit(acpi_button_exit);
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