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/*
* Copyright 2011 Calxeda, Inc.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope 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, see <http://www.gnu.org/licenses/>.
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/platform_device.h>
#include <linux/input.h>
#include <mach/pl320-ipc.h>
struct hb_keys_drvdata {
struct input_dev *input;
struct notifier_block nb;
};
int hb_keys_notifier(struct notifier_block *nb, unsigned long event, void *data)
{
struct hb_keys_drvdata *ddata = container_of(nb, struct hb_keys_drvdata, nb);
struct input_dev *input = ddata->input;
u32 *d = data;
u32 key = d[0];
if (event != 0x1000 /*HB_IPC_KEY*/)
return 0;
input_event(input, EV_KEY, key, 1);
input_event(input, EV_KEY, key, 0);
input_sync(input);
return 0;
}
static int hb_keys_open(struct input_dev *input)
{
struct hb_keys_drvdata *ddata = input_get_drvdata(input);
return pl320_ipc_register_notifier(&ddata->nb);
}
static void hb_keys_close(struct input_dev *input)
{
struct hb_keys_drvdata *ddata = input_get_drvdata(input);
pl320_ipc_unregister_notifier(&ddata->nb);
}
static int __devinit hb_keys_probe(struct platform_device *pdev)
{
struct hb_keys_drvdata *ddata;
struct device *dev = &pdev->dev;
struct input_dev *input;
int error;
ddata = kzalloc(sizeof(*ddata), GFP_KERNEL);
if (!ddata)
return -ENOMEM;
input = input_allocate_device();
if (!input) {
dev_err(dev, "failed to allocate state\n");
error = -ENOMEM;
goto fail1;
}
platform_set_drvdata(pdev, ddata);
input_set_drvdata(input, ddata);
ddata->input = input;
ddata->nb.notifier_call = hb_keys_notifier;
input->name = pdev->name;
input->phys = "highbank/input0";
input->dev.parent = &pdev->dev;
input->open = hb_keys_open;
input->close = hb_keys_close;
input->id.bustype = BUS_HOST;
input->id.vendor = 0x0001;
input->id.product = 0x0001;
input->id.version = 0x0100;
input_set_capability(input, EV_KEY, KEY_POWER);
input_set_capability(input, EV_KEY, KEY_SLEEP);
error = input_register_device(input);
if (error) {
dev_err(dev, "Unable to register input device, error: %d\n",
error);
goto fail2;
}
return 0;
fail2:
input_free_device(input);
fail1:
kfree(ddata);
return error;
}
static int __devexit hb_keys_remove(struct platform_device *pdev)
{
struct hb_keys_drvdata *ddata = platform_get_drvdata(pdev);
input_unregister_device(ddata->input);
kfree(ddata);
return 0;
}
static struct of_device_id hb_keys_of_match[] = {
{ .compatible = "calxeda,hb-keys", },
{ },
};
MODULE_DEVICE_TABLE(of, hb_keys_of_match);
static struct platform_driver hb_keys_driver = {
.probe = hb_keys_probe,
.remove = __devexit_p(hb_keys_remove),
.driver = {
.name = "hb-keys",
.of_match_table = hb_keys_of_match,
}
};
module_platform_driver(hb_keys_driver);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Calxeda, Inc.");
MODULE_DESCRIPTION("Keys driver for Calxeda Highbank");
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