1/*
  2 * PlayStation 2 Trance Vibrator driver
  3 *
  4 * Copyright (C) 2006 Sam Hocevar <sam@zoy.org>
  5 *
  6 *  This program is free software; you can redistribute it and/or modify
  7 *  it under the terms of the GNU General Public License as published by
  8 *  the Free Software Foundation; either version 2 of the License, or
  9 *  (at your option) any later version.
 10 *
 11 *  This program is distributed in the hope that it will be useful,
 12 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 13 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 14 *  GNU General Public License for more details.
 15 *
 16 *  You should have received a copy of the GNU General Public License
 17 *  along with this program; if not, write to the Free Software
 18 *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 19 */
 20
 21/* Standard include files */
 22#include <linux/kernel.h>
 23#include <linux/errno.h>
 24#include <linux/slab.h>
 25#include <linux/module.h>
 26#include <linux/usb.h>
 27
 28/* Version Information */
 29#define DRIVER_VERSION "v1.1"
 30#define DRIVER_AUTHOR "Sam Hocevar, sam@zoy.org"
 31#define DRIVER_DESC "PlayStation 2 Trance Vibrator driver"
 32
 33#define TRANCEVIBRATOR_VENDOR_ID	0x0b49	/* ASCII Corporation */
 34#define TRANCEVIBRATOR_PRODUCT_ID	0x064f	/* Trance Vibrator */
 35
 36static const struct usb_device_id id_table[] = {
 37	{ USB_DEVICE(TRANCEVIBRATOR_VENDOR_ID, TRANCEVIBRATOR_PRODUCT_ID) },
 38	{ },
 39};
 40MODULE_DEVICE_TABLE (usb, id_table);
 41
 42/* Driver-local specific stuff */
 43struct trancevibrator {
 44	struct usb_device *udev;
 45	unsigned int speed;
 46};
 47
 48static ssize_t show_speed(struct device *dev, struct device_attribute *attr,
 49			  char *buf)
 50{
 51	struct usb_interface *intf = to_usb_interface(dev);
 52	struct trancevibrator *tv = usb_get_intfdata(intf);
 53
 54	return sprintf(buf, "%d\n", tv->speed);
 55}
 56
 57static ssize_t set_speed(struct device *dev, struct device_attribute *attr,
 58			 const char *buf, size_t count)
 59{
 60	struct usb_interface *intf = to_usb_interface(dev);
 61	struct trancevibrator *tv = usb_get_intfdata(intf);
 62	int temp, retval, old;
 63
 64	temp = simple_strtoul(buf, NULL, 10);
 65	if (temp > 255)
 66		temp = 255;
 67	else if (temp < 0)
 68		temp = 0;
 69	old = tv->speed;
 70	tv->speed = temp;
 71
 72	dev_dbg(&tv->udev->dev, "speed = %d\n", tv->speed);
 73
 74	/* Set speed */
 75	retval = usb_control_msg(tv->udev, usb_sndctrlpipe(tv->udev, 0),
 76				 0x01, /* vendor request: set speed */
 77				 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_OTHER,
 78				 tv->speed, /* speed value */
 79				 0, NULL, 0, USB_CTRL_GET_TIMEOUT);
 80	if (retval) {
 81		tv->speed = old;
 82		dev_dbg(&tv->udev->dev, "retval = %d\n", retval);
 83		return retval;
 84	}
 85	return count;
 86}
 87
 88static DEVICE_ATTR(speed, S_IRUGO | S_IWUSR, show_speed, set_speed);
 89
 90static int tv_probe(struct usb_interface *interface,
 91		    const struct usb_device_id *id)
 92{
 93	struct usb_device *udev = interface_to_usbdev(interface);
 94	struct trancevibrator *dev;
 95	int retval;
 96
 97	dev = kzalloc(sizeof(struct trancevibrator), GFP_KERNEL);
 98	if (dev == NULL) {
 99		dev_err(&interface->dev, "Out of memory\n");
100		retval = -ENOMEM;
101		goto error;
102	}
103
104	dev->udev = usb_get_dev(udev);
105	usb_set_intfdata(interface, dev);
106	retval = device_create_file(&interface->dev, &dev_attr_speed);
107	if (retval)
108		goto error_create_file;
109
110	return 0;
111
112error_create_file:
113	usb_put_dev(udev);
114	usb_set_intfdata(interface, NULL);
115error:
116	kfree(dev);
117	return retval;
118}
119
120static void tv_disconnect(struct usb_interface *interface)
121{
122	struct trancevibrator *dev;
123
124	dev = usb_get_intfdata (interface);
125	device_remove_file(&interface->dev, &dev_attr_speed);
126	usb_set_intfdata(interface, NULL);
127	usb_put_dev(dev->udev);
128	kfree(dev);
129}
130
131/* USB subsystem object */
132static struct usb_driver tv_driver = {
133	.name =		"trancevibrator",
134	.probe =	tv_probe,
135	.disconnect =	tv_disconnect,
136	.id_table =	id_table,
137};
138
139module_usb_driver(tv_driver);
140
141MODULE_AUTHOR(DRIVER_AUTHOR);
142MODULE_DESCRIPTION(DRIVER_DESC);
143MODULE_LICENSE("GPL");