path: root/drivers/media/video/usbvideo/quickcam_messenger.c

/*
 * Driver for Logitech Quickcam Messenger usb video camera
 * Copyright (C) Jaya Kumar
 *
 * This work was sponsored by CIS(M) Sdn Bhd.
 * History:
 * 05/08/2006 - Jaya Kumar
 * I wrote this based on the konicawc by Simon Evans.
 * -
 * Full credit for reverse engineering and creating an initial
 * working linux driver for the VV6422 goes to the qce-ga project by
 * Tuukka Toivonen, Jochen Hoenicke, Peter McConnell,
 * Cristiano De Michele, Georg Acher, Jean-Frederic Clere as well as
 * others.
 * ---
 * 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/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/input.h>
#include <linux/usb/input.h>

#include "usbvideo.h"
#include "quickcam_messenger.h"

/*
 * Version Information
 */

#ifdef CONFIG_USB_DEBUG
static int debug;
#define DEBUG(n, format, arg...) \
	if (n <= debug) {	 \
		printk(KERN_DEBUG __FILE__ ":%s(): " format "\n", __func__ , ## arg); \
	}
#else
#define DEBUG(n, arg...)
static const int debug;
#endif

#define DRIVER_VERSION "v0.01"
#define DRIVER_DESC "Logitech Quickcam Messenger USB"

#define USB_LOGITECH_VENDOR_ID	0x046D
#define USB_QCM_PRODUCT_ID	0x08F0

#define MAX_CAMERAS	1

#define MAX_COLOUR	32768
#define MAX_HUE		32768
#define MAX_BRIGHTNESS	32768
#define MAX_CONTRAST	32768
#define MAX_WHITENESS	32768

static int size = SIZE_320X240;
static int colour = MAX_COLOUR;
static int hue = MAX_HUE;
static int brightness =	MAX_BRIGHTNESS;
static int contrast =	MAX_CONTRAST;
static int whiteness =	MAX_WHITENESS;

static struct usbvideo *cams;

static struct usb_device_id qcm_table [] = {
	{ USB_DEVICE(USB_LOGITECH_VENDOR_ID, USB_QCM_PRODUCT_ID) },
	{ }
};
MODULE_DEVICE_TABLE(usb, qcm_table);

#ifdef CONFIG_INPUT
static void qcm_register_input(struct qcm *cam, struct usb_device *dev)
{
	struct input_dev *input_dev;
	int error;

	usb_make_path(dev, cam->input_physname, sizeof(cam->input_physname));
	strncat(cam->input_physname, "/input0", sizeof(cam->input_physname));

	cam->input = input_dev = input_allocate_device();
	if (!input_dev) {
		warn("insufficient mem for cam input device");
		return;
	}

	input_dev->name = "QCM button";
	input_dev->phys = cam->input_physname;
	usb_to_input_id(dev, &input_dev->id);
	input_dev->dev.parent = &dev->dev;

	input_dev->evbit[0] = BIT_MASK(EV_KEY);
	input_dev->keybit[BIT_WORD(BTN_0)] = BIT_MASK(BTN_0);

	error = input_register_device(cam->input);
	if (error) {
		warn("Failed to register camera's input device, err: %d\n",
		     error);
		input_free_device(cam->input);
		cam->input = NULL;
	}
}

static void qcm_unregister_input(struct qcm *cam)
{
	if (cam->input) {
		input_unregister_device(cam->input);
		cam->input = NULL;
	}
}

static void qcm_report_buttonstat(struct qcm *cam)
{
	if (cam->input) {
		input_report_key(cam->input, BTN_0, cam->button_sts);
		input_sync(cam->input);
	}
}

static void qcm_int_irq(struct urb *urb)
{
	int ret;
	struct uvd *uvd = urb->context;
	struct qcm *cam;

	if (!CAMERA_IS_OPERATIONAL(uvd))
		return;

	if (!uvd->streaming)
		return;

	uvd->stats.urb_count++;

	if (urb->status < 0)
		uvd->stats.iso_err_count++;
	else {
		if