119 lines
3 KiB
C
Executable file
119 lines
3 KiB
C
Executable file
/*
|
|
* driver for powerbutton on IBM cell blades
|
|
*
|
|
* (C) Copyright IBM Corp. 2005-2008
|
|
*
|
|
* Author: Christian Krafft <krafft@de.ibm.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, 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., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
*/
|
|
|
|
#include <linux/input.h>
|
|
#include <linux/module.h>
|
|
#include <linux/platform_device.h>
|
|
#include <asm/pmi.h>
|
|
#include <asm/prom.h>
|
|
|
|
static struct input_dev *button_dev;
|
|
static struct platform_device *button_pdev;
|
|
|
|
static void cbe_powerbutton_handle_pmi(pmi_message_t pmi_msg)
|
|
{
|
|
BUG_ON(pmi_msg.type != PMI_TYPE_POWER_BUTTON);
|
|
|
|
input_report_key(button_dev, KEY_POWER, 1);
|
|
input_sync(button_dev);
|
|
input_report_key(button_dev, KEY_POWER, 0);
|
|
input_sync(button_dev);
|
|
}
|
|
|
|
static struct pmi_handler cbe_pmi_handler = {
|
|
.type = PMI_TYPE_POWER_BUTTON,
|
|
.handle_pmi_message = cbe_powerbutton_handle_pmi,
|
|
};
|
|
|
|
static int __init cbe_powerbutton_init(void)
|
|
{
|
|
int ret = 0;
|
|
struct input_dev *dev;
|
|
|
|
if (!of_machine_is_compatible("IBM,CBPLUS-1.0")) {
|
|
printk(KERN_ERR "%s: Not a cell blade.\n", __func__);
|
|
ret = -ENODEV;
|
|
goto out;
|
|
}
|
|
|
|
dev = input_allocate_device();
|
|
if (!dev) {
|
|
ret = -ENOMEM;
|
|
printk(KERN_ERR "%s: Not enough memory.\n", __func__);
|
|
goto out;
|
|
}
|
|
|
|
set_bit(EV_KEY, dev->evbit);
|
|
set_bit(KEY_POWER, dev->keybit);
|
|
|
|
dev->name = "Power Button";
|
|
dev->id.bustype = BUS_HOST;
|
|
|
|
/* this makes the button look like an acpi power button
|
|
* no clue whether anyone relies on that though */
|
|
dev->id.product = 0x02;
|
|
dev->phys = "LNXPWRBN/button/input0";
|
|
|
|
button_pdev = platform_device_register_simple("power_button", 0, NULL, 0);
|
|
if (IS_ERR(button_pdev)) {
|
|
ret = PTR_ERR(button_pdev);
|
|
goto out_free_input;
|
|
}
|
|
|
|
dev->dev.parent = &button_pdev->dev;
|
|
ret = input_register_device(dev);
|
|
if (ret) {
|
|
printk(KERN_ERR "%s: Failed to register device\n", __func__);
|
|
goto out_free_pdev;
|
|
}
|
|
|
|
button_dev = dev;
|
|
|
|
ret = pmi_register_handler(&cbe_pmi_handler);
|
|
if (ret) {
|
|
printk(KERN_ERR "%s: Failed to register with pmi.\n", __func__);
|
|
goto out_free_pdev;
|
|
}
|
|
|
|
goto out;
|
|
|
|
out_free_pdev:
|
|
platform_device_unregister(button_pdev);
|
|
out_free_input:
|
|
input_free_device(dev);
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
static void __exit cbe_powerbutton_exit(void)
|
|
{
|
|
pmi_unregister_handler(&cbe_pmi_handler);
|
|
platform_device_unregister(button_pdev);
|
|
input_free_device(button_dev);
|
|
}
|
|
|
|
module_init(cbe_powerbutton_init);
|
|
module_exit(cbe_powerbutton_exit);
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_AUTHOR("Christian Krafft <krafft@de.ibm.com>");
|