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Code

try to write the ingenic driver

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This commit is contained in:
xiangfu 2009-04-15 17:06:05 +00:00
parent 4303c6e1f5
commit e418b865c4
1 changed files with 118 additions and 0 deletions
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118
ingenic-tools/drivers/ingenic.c Normal file
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/*
* Ingenic driver
*
* Copyright (C) 2009 Pi, Xiangfu Liu (xiangfu.z@gmail.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/config.h>
#ifdef CONFIG_USB_DEBUG
#define DEBUG 1
#endif
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/usb.h>
#define DRIVER_AUTHOR "xiangfu, xiangfu.z@gmail.com"
#define DRIVER_DESC "Ingenic driver"
#define VENDOR_ID 0x601a
#define PRODUCT_ID 0x4740
/* table of devices that work with this driver */
static struct usb_device_id ingenic_table [] = {
{ USB_DEVICE(VENDOR_ID, PRODUCT_ID) },
{ },
};
MODULE_DEVICE_TABLE (usb, ingenic_table);
struct usb_ingenic {
struct usb_device * udev;
};
static int ingenic_probe(struct usb_interface *interface, const struct usb_device_id *id)
{
struct usb_device *udev = interface_to_usbdev(interface);
struct usb_ingenic *dev = NULL;
int retval = -ENOMEM;
dev = kmalloc(sizeof(struct usb_ingenic), GFP_KERNEL);
if (dev == NULL) {
dev_err(&interface->dev, "Out of memory\n");
goto error;
}
memset (dev, 0x00, sizeof (*dev));
dev->udev = usb_get_dev(udev);
usb_set_intfdata (interface, dev);
dev_info(&interface->dev, "Ingenic device now attached\n");
return 0;
error:
kfree(dev);
return retval;
}
static void ingenic_disconnect(struct usb_interface *interface)
{
struct usb_ingenic *dev;
dev = usb_get_intfdata (interface);
usb_set_intfdata (interface, NULL);
usb_put_dev(dev->udev);
kfree(dev);
dev_info(&interface->dev, "Ingenic device now disconnected\n");
}
static struct usb_driver ingenic_driver = {
.owner = THIS_MODULE,
.name = "Ingenic",
.probe = ingenic_probe,
.disconnect = ingenic_disconnect,
.id_table = id_table,
};
static int __init usb_ingenic_init(void)
{
int retval = 0;
retval = usb_register(&ingenic_driver);
if (retval)
err("usb_register failed. Error number %d", retval);
return retval;
}
static void __exit usb_ingenic_exit(void)
{
usb_deregister(&ingenic_driver);
}
module_init (usb_ingenic_init);
module_exit (usb_ingenic_exit);
MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");