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315 lines
8.2 KiB
315 lines
8.2 KiB
/*
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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 <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_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 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 = "ACPI_FPB,ACPI_FSB,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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acpi_handle handle;
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struct acpi_device *device; /* Fixed button kludge */
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u8 type;
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unsigned long pushed;
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};
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/* --------------------------------------------------------------------------
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Driver Interface
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-------------------------------------------------------------------------- */
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static void
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acpi_button_notify (
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acpi_handle handle,
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u32 event,
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void *data)
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{
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struct acpi_button *button = (struct acpi_button *) data;
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ACPI_FUNCTION_TRACE("acpi_button_notify");
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if (!button || !button->device)
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return_VOID;
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switch (event) {
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case ACPI_BUTTON_NOTIFY_STATUS:
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acpi_bus_generate_event(button->device, event, ++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_VOID;
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}
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static acpi_status
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acpi_button_notify_fixed (
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void *data)
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{
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struct acpi_button *button = (struct acpi_button *) data;
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ACPI_FUNCTION_TRACE("acpi_button_notify_fixed");
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BUG_ON(!button);
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acpi_button_notify(button->handle, ACPI_BUTTON_NOTIFY_STATUS, button);
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return_ACPI_STATUS(AE_OK);
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}
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static int
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acpi_button_add (
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struct acpi_device *device)
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{
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int result = 0;
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acpi_status status = AE_OK;
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struct acpi_button *button = NULL;
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ACPI_FUNCTION_TRACE("acpi_button_add");
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if (!device)
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return_VALUE(-EINVAL);
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button = kmalloc(sizeof(struct acpi_button), GFP_KERNEL);
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if (!button)
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return_VALUE(-ENOMEM);
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memset(button, 0, sizeof(struct acpi_button));
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button->device = device;
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button->handle = device->handle;
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acpi_driver_data(device) = button;
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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),
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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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}
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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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}
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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),
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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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}
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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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}
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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),
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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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}
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else {
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ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Unsupported hid [%s]\n",
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acpi_device_hid(device)));
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result = -ENODEV;
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goto end;
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}
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switch (button->type) {
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case ACPI_BUTTON_TYPE_POWERF:
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status = acpi_install_fixed_event_handler (
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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 = acpi_install_fixed_event_handler (
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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 (
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button->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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if (ACPI_FAILURE(status)) {
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ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
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"Error installing notify handler\n"));
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result = -ENODEV;
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goto end;
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}
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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, 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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end:
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if (result) {
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kfree(button);
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}
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return_VALUE(result);
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}
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static int
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acpi_button_remove (struct acpi_device *device, int type)
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{
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acpi_status status = 0;
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struct acpi_button *button = NULL;
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ACPI_FUNCTION_TRACE("acpi_button_remove");
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if (!device || !acpi_driver_data(device))
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return_VALUE(-EINVAL);
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button = acpi_driver_data(device);
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/* Unregister for device notifications. */
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switch (button->type) {
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case ACPI_BUTTON_TYPE_POWERF:
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status = acpi_remove_fixed_event_handler(
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ACPI_EVENT_POWER_BUTTON, acpi_button_notify_fixed);
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break;
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case ACPI_BUTTON_TYPE_SLEEPF:
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status = acpi_remove_fixed_event_handler(
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ACPI_EVENT_SLEEP_BUTTON, acpi_button_notify_fixed);
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break;
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default:
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status = acpi_remove_notify_handler(button->handle,
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ACPI_DEVICE_NOTIFY, acpi_button_notify);
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break;
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}
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if (ACPI_FAILURE(status))
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ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
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"Error removing notify handler\n"));
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kfree(button);
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return_VALUE(0);
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}
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static int __init
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acpi_button_init (void)
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{
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int result = 0;
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ACPI_FUNCTION_TRACE("acpi_button_init");
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result = acpi_bus_register_driver(&acpi_button_driver);
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if (result < 0) {
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return_VALUE(-ENODEV);
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}
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return_VALUE(0);
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}
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static void __exit
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acpi_button_exit (void)
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{
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ACPI_FUNCTION_TRACE("acpi_button_exit");
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acpi_bus_unregister_driver(&acpi_button_driver);
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return_VOID;
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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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