// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * USB IBM C-It Video Camera driver
 *
 * Supports Xirlink C-It Video Camera, IBM PC Camera,
 * IBM NetCamera and Veo Stingray.
 *
 * Copyright (C) 2010 Hans de Goede <hdegoede@redhat.com>
 *
 * This driver is based on earlier work of:
 *
 * (C) Copyright 1999 Johannes Erdfelt
 * (C) Copyright 1999 Randy Dunlap
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#define MODULE_NAME "xirlink-cit"

#include <linux/input.h>
#include "gspca.h"

MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
MODULE_DESCRIPTION("Xirlink C-IT");
MODULE_LICENSE("GPL");

/* FIXME we should autodetect this */
static int ibm_netcam_pro;
module_param(ibm_netcam_pro, int, 0);
MODULE_PARM_DESC(ibm_netcam_pro,
                 "Use IBM Netcamera Pro init sequences for Model 3 cams");

/* FIXME this should be handled through the V4L2 input selection API */
static int rca_input;
module_param(rca_input, int, 0644);
MODULE_PARM_DESC(rca_input,
                 "Use rca input instead of ccd sensor on Model 3 cams");

/* specific webcam descriptor */
struct sd {
        struct gspca_dev gspca_dev;             /* !! must be the first item */
        struct v4l2_ctrl *lighting;
        u8 model;
#define CIT_MODEL0 0 /* bcd version 0.01 cams ie the xvp-500 */
#define CIT_MODEL1 1 /* The model 1 - 4 nomenclature comes from the old */
#define CIT_MODEL2 2 /* ibmcam driver */
#define CIT_MODEL3 3
#define CIT_MODEL4 4
#define CIT_IBM_NETCAM_PRO 5
        u8 input_index;
        u8 button_state;
        u8 stop_on_control_change;
        u8 sof_read;
        u8 sof_len;
};

static void sd_stop0(struct gspca_dev *gspca_dev);

static const struct v4l2_pix_format cif_yuv_mode[] = {
        {176, 144, V4L2_PIX_FMT_CIT_YYVYUY, V4L2_FIELD_NONE,
                .bytesperline = 176,
                .sizeimage = 176 * 144 * 3 / 2 + 4,
                .colorspace = V4L2_COLORSPACE_SRGB},
        {352, 288, V4L2_PIX_FMT_CIT_YYVYUY, V4L2_FIELD_NONE,
                .bytesperline = 352,
                .sizeimage = 352 * 288 * 3 / 2 + 4,
                .colorspace = V4L2_COLORSPACE_SRGB},
};

static const struct v4l2_pix_format vga_yuv_mode[] = {
        {160, 120, V4L2_PIX_FMT_CIT_YYVYUY, V4L2_FIELD_NONE,
                .bytesperline = 160,
                .sizeimage = 160 * 120 * 3 / 2 + 4,
                .colorspace = V4L2_COLORSPACE_SRGB},
        {320, 240, V4L2_PIX_FMT_CIT_YYVYUY, V4L2_FIELD_NONE,
                .bytesperline = 320,
                .sizeimage = 320 * 240 * 3 / 2 + 4,
                .colorspace = V4L2_COLORSPACE_SRGB},
        {640, 480, V4L2_PIX_FMT_CIT_YYVYUY, V4L2_FIELD_NONE,
                .bytesperline = 640,
                .sizeimage = 640 * 480 * 3 / 2 + 4,
                .colorspace = V4L2_COLORSPACE_SRGB},
};

static const struct v4l2_pix_format model0_mode[] = {
        {160, 120, V4L2_PIX_FMT_CIT_YYVYUY, V4L2_FIELD_NONE,
                .bytesperline = 160,
                .sizeimage = 160 * 120 * 3 / 2 + 4,
                .colorspace = V4L2_COLORSPACE_SRGB},
        {176, 144, V4L2_PIX_FMT_CIT_YYVYUY, V4L2_FIELD_NONE,
                .bytesperline = 176,
                .sizeimage = 176 * 144 * 3 / 2 + 4,
                .colorspace = V4L2_COLORSPACE_SRGB},
        {320, 240, V4L2_PIX_FMT_CIT_YYVYUY, V4L2_FIELD_NONE,
                .bytesperline = 320,
                .sizeimage = 320 * 240 * 3 / 2 + 4,
                .colorspace = V4L2_COLORSPACE_SRGB},
};

static const struct v4l2_pix_format model2_mode[] = {
        {160, 120, V4L2_PIX_FMT_CIT_YYVYUY, V4L2_FIELD_NONE,
                .bytesperline = 160,
                .sizeimage = 160 * 120 * 3 / 2 + 4,
                .colorspace = V4L2_COLORSPACE_SRGB},
        {176, 144, V4L2_PIX_FMT_CIT_YYVYUY, V4L2_FIELD_NONE,
                .bytesperline = 176,
                .sizeimage = 176 * 144 * 3 / 2 + 4,
                .colorspace = V4L2_COLORSPACE_SRGB},
        {320, 240, V4L2_PIX_FMT_SGRBG8, V4L2_FIELD_NONE,
                .bytesperline = 320,
                .sizeimage = 320 * 240 + 4,
                .colorspace = V4L2_COLORSPACE_SRGB},
        {352, 288, V4L2_PIX_FMT_SGRBG8, V4L2_FIELD_NONE,
                .bytesperline = 352,
                .sizeimage = 352 * 288 + 4,
                .colorspace = V4L2_COLORSPACE_SRGB},
};

/*
 * 01.01.08 - Added for RCA video in support -LO
 * This struct is used to init the Model3 cam to use the RCA video in port
 * instead of the CCD sensor.
 */
static const u16 rca_initdata[][3] = {
        {0, 0x0000, 0x010c},
        {0, 0x0006, 0x012c},
        {0, 0x0078, 0x012d},
        {0, 0x0046, 0x012f},
        {0, 0xd141, 0x0124},
        {0, 0x0000, 0x0127},
        {0, 0xfea8, 0x0124},
        {1, 0x0000, 0x0116},
        {0, 0x0064, 0x0116},
        {1, 0x0000, 0x0115},
        {0, 0x0003, 0x0115},
        {0, 0x0008, 0x0123},
        {0, 0x0000, 0x0117},
        {0, 0x0000, 0x0112},
        {0, 0x0080, 0x0100},
        {0, 0x0000, 0x0100},
        {1, 0x0000, 0x0116},
        {0, 0x0060, 0x0116},
        {0, 0x0002, 0x0112},
        {0, 0x0000, 0x0123},
        {0, 0x0001, 0x0117},
        {0, 0x0040, 0x0108},
        {0, 0x0019, 0x012c},
        {0, 0x0040, 0x0116},
        {0, 0x000a, 0x0115},
        {0, 0x000b, 0x0115},
        {0, 0x0078, 0x012d},
        {0, 0x0046, 0x012f},
        {0, 0xd141, 0x0124},
        {0, 0x0000, 0x0127},
        {0, 0xfea8, 0x0124},
        {0, 0x0064, 0x0116},
        {0, 0x0000, 0x0115},
        {0, 0x0001, 0x0115},
        {0, 0xffff, 0x0124},
        {0, 0xfff9, 0x0124},
        {0, 0x0086, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x00aa, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x0000, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0xfffa, 0x0124},
        {0, 0xffff, 0x0124},
        {0, 0xfff9, 0x0124},
        {0, 0x0086, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x00f2, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x000f, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0xfffa, 0x0124},
        {0, 0xffff, 0x0124},
        {0, 0xfff9, 0x0124},
        {0, 0x0086, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x00f8, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x00fc, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0xfffa, 0x0124},
        {0, 0xffff, 0x0124},
        {0, 0xfff9, 0x0124},
        {0, 0x0086, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x00f9, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x003c, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0xfffa, 0x0124},
        {0, 0xffff, 0x0124},
        {0, 0xfff9, 0x0124},
        {0, 0x0086, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x0027, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x0019, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0xfffa, 0x0124},
        {0, 0xfff9, 0x0124},
        {0, 0x0086, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x0037, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x0000, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x0021, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0xfffa, 0x0124},
        {0, 0xfff9, 0x0124},
        {0, 0x0086, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x0038, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x0006, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x0045, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0xfffa, 0x0124},
        {0, 0xfff9, 0x0124},
        {0, 0x0086, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x0037, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x0001, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x002a, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0xfffa, 0x0124},
        {0, 0xfff9, 0x0124},
        {0, 0x0086, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x0038, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x0000, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x000e, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0xfffa, 0x0124},
        {0, 0xfff9, 0x0124},
        {0, 0x0086, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x0037, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x0001, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x002b, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0xfffa, 0x0124},
        {0, 0xfff9, 0x0124},
        {0, 0x0086, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x0038, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x0001, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x00f4, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0xfffa, 0x0124},
        {0, 0xfff9, 0x0124},
        {0, 0x0086, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x0037, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x0001, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x002c, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0xfffa, 0x0124},
        {0, 0xfff9, 0x0124},
        {0, 0x0086, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x0038, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x0001, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x0004, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0xfffa, 0x0124},
        {0, 0xfff9, 0x0124},
        {0, 0x0086, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x0037, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x0001, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x002d, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0xfffa, 0x0124},
        {0, 0xfff9, 0x0124},
        {0, 0x0086, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x0038, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x0000, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x0014, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0xfffa, 0x0124},
        {0, 0xfff9, 0x0124},
        {0, 0x0086, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x0037, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x0001, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x002e, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0xfffa, 0x0124},
        {0, 0xfff9, 0x0124},
        {0, 0x0086, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x0038, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x0003, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x0000, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0xfffa, 0x0124},
        {0, 0xfff9, 0x0124},
        {0, 0x0086, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x0037, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x0001, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x002f, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0xfffa, 0x0124},
        {0, 0xfff9, 0x0124},
        {0, 0x0086, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x0038, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x0003, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x0014, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0xfffa, 0x0124},
        {0, 0xfff9, 0x0124},
        {0, 0x0086, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x0037, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x0001, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x0040, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0xfffa, 0x0124},
        {0, 0xfff9, 0x0124},
        {0, 0x0086, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x0038, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x0000, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x0040, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0xfffa, 0x0124},
        {0, 0xfff9, 0x0124},
        {0, 0x0086, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x0037, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x0001, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x0053, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0xfffa, 0x0124},
        {0, 0xfff9, 0x0124},
        {0, 0x0086, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x0038, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x0000, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x0038, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0xfffa, 0x0124},
        {0, 0x0000, 0x0101},
        {0, 0x00a0, 0x0103},
        {0, 0x0078, 0x0105},
        {0, 0x0000, 0x010a},
        {0, 0x0024, 0x010b},
        {0, 0x0028, 0x0119},
        {0, 0x0088, 0x011b},
        {0, 0x0002, 0x011d},
        {0, 0x0003, 0x011e},
        {0, 0x0000, 0x0129},
        {0, 0x00fc, 0x012b},
        {0, 0x0008, 0x0102},
        {0, 0x0000, 0x0104},
        {0, 0x0008, 0x011a},
        {0, 0x0028, 0x011c},
        {0, 0x0021, 0x012a},
        {0, 0x0000, 0x0118},
        {0, 0x0000, 0x0132},
        {0, 0x0000, 0x0109},
        {0, 0xfff9, 0x0124},
        {0, 0x0086, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x0037, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x0001, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x0031, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0xfffa, 0x0124},
        {0, 0xfff9, 0x0124},
        {0, 0x0086, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x0038, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x0000, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x0000, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0xfffa, 0x0124},
        {0, 0xfff9, 0x0124},
        {0, 0x0086, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x0037, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x0001, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x0040, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0xfffa, 0x0124},
        {0, 0xfff9, 0x0124},
        {0, 0x0086, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x0038, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x0000, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x0040, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0xfffa, 0x0124},
        {0, 0xfff9, 0x0124},
        {0, 0x0086, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x0037, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x0000, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x00dc, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0xfffa, 0x0124},
        {0, 0xfff9, 0x0124},
        {0, 0x0086, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x0038, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x0000, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x0000, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0xfffa, 0x0124},
        {0, 0xfff9, 0x0124},
        {0, 0x0086, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x0037, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x0001, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x0032, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0xfffa, 0x0124},
        {0, 0xfff9, 0x0124},
        {0, 0x0086, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x0038, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x0001, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x0020, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0xfffa, 0x0124},
        {0, 0xfff9, 0x0124},
        {0, 0x0086, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x0037, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x0001, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x0040, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0xfffa, 0x0124},
        {0, 0xfff9, 0x0124},
        {0, 0x0086, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x0038, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x0000, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x0040, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0xfffa, 0x0124},
        {0, 0xfff9, 0x0124},
        {0, 0x0086, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x0037, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x0000, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x0030, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0xfffa, 0x0124},
        {0, 0xfff9, 0x0124},
        {0, 0x0086, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x0038, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x0008, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0x0000, 0x0127},
        {0, 0xfff8, 0x0124},
        {0, 0xfffd, 0x0124},
        {0, 0xfffa, 0x0124},
        {0, 0x0003, 0x0111},
};

/* TESTME the old ibmcam driver repeats certain commands to Model1 cameras, we
   do the same for now (testing needed to see if this is really necessary) */
static const int cit_model1_ntries = 5;
static const int cit_model1_ntries2 = 2;

static int cit_write_reg(struct gspca_dev *gspca_dev, u16 value, u16 index)
{
        struct usb_device *udev = gspca_dev->dev;
        int err;

        err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x00,
                        USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT,
                        value, index, NULL, 0, 1000);
        if (err < 0)
                pr_err("Failed to write a register (index 0x%04X, value 0x%02X, error %d)\n",
                       index, value, err);

        return 0;
}

static int cit_read_reg(struct gspca_dev *gspca_dev, u16 index, int verbose)
{
        struct usb_device *udev = gspca_dev->dev;
        __u8 *buf = gspca_dev->usb_buf;
        int res;

        res = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 0x01,
                        USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT,
                        0x00, index, buf, 8, 1000);
        if (res < 0) {
                pr_err("Failed to read a register (index 0x%04X, error %d)\n",
                       index, res);
                return res;
        }

        if (verbose)
                gspca_dbg(gspca_dev, D_PROBE, "Register %04x value: %02x\n",
                          index, buf[0]);

        return 0;
}

/*
 * cit_send_FF_04_02()
 *
 * This procedure sends magic 3-command prefix to the camera.
 * The purpose of this prefix is not known.
 *
 * History:
 * 1/2/00   Created.
 */
static void cit_send_FF_04_02(struct gspca_dev *gspca_dev)
{
        cit_write_reg(gspca_dev, 0x00FF, 0x0127);
        cit_write_reg(gspca_dev, 0x0004, 0x0124);
        cit_write_reg(gspca_dev, 0x0002, 0x0124);
}

static void cit_send_00_04_06(struct gspca_dev *gspca_dev)
{
        cit_write_reg(gspca_dev, 0x0000, 0x0127);
        cit_write_reg(gspca_dev, 0x0004, 0x0124);
        cit_write_reg(gspca_dev, 0x0006, 0x0124);
}

static void cit_send_x_00(struct gspca_dev *gspca_dev, unsigned short x)
{
        cit_write_reg(gspca_dev, x,      0x0127);
        cit_write_reg(gspca_dev, 0x0000, 0x0124);
}

static void cit_send_x_00_05(struct gspca_dev *gspca_dev, unsigned short x)
{
        cit_send_x_00(gspca_dev, x);
        cit_write_reg(gspca_dev, 0x0005, 0x0124);
}

static void cit_send_x_00_05_02(struct gspca_dev *gspca_dev, unsigned short x)
{
        cit_write_reg(gspca_dev, x,      0x0127);
        cit_write_reg(gspca_dev, 0x0000, 0x0124);
        cit_write_reg(gspca_dev, 0x0005, 0x0124);
        cit_write_reg(gspca_dev, 0x0002, 0x0124);
}

static void cit_send_x_01_00_05(struct gspca_dev *gspca_dev, u16 x)
{
        cit_write_reg(gspca_dev, x,      0x0127);
        cit_write_reg(gspca_dev, 0x0001, 0x0124);
        cit_write_reg(gspca_dev, 0x0000, 0x0124);
        cit_write_reg(gspca_dev, 0x0005, 0x0124);
}

static void cit_send_x_00_05_02_01(struct gspca_dev *gspca_dev, u16 x)
{
        cit_write_reg(gspca_dev, x,      0x0127);
        cit_write_reg(gspca_dev, 0x0000, 0x0124);
        cit_write_reg(gspca_dev, 0x0005, 0x0124);
        cit_write_reg(gspca_dev, 0x0002, 0x0124);
        cit_write_reg(gspca_dev, 0x0001, 0x0124);
}

static void cit_send_x_00_05_02_08_01(struct gspca_dev *gspca_dev, u16 x)
{
        cit_write_reg(gspca_dev, x,      0x0127);
        cit_write_reg(gspca_dev, 0x0000, 0x0124);
        cit_write_reg(gspca_dev, 0x0005, 0x0124);
        cit_write_reg(gspca_dev, 0x0002, 0x0124);
        cit_write_reg(gspca_dev, 0x0008, 0x0124);
        cit_write_reg(gspca_dev, 0x0001, 0x0124);
}

static void cit_Packet_Format1(struct gspca_dev *gspca_dev, u16 fkey, u16 val)
{
        cit_send_x_01_00_05(gspca_dev, 0x0088);
        cit_send_x_00_05(gspca_dev, fkey);
        cit_send_x_00_05_02_08_01(gspca_dev, val);
        cit_send_x_00_05(gspca_dev, 0x0088);
        cit_send_x_00_05_02_01(gspca_dev, fkey);
        cit_send_x_00_05(gspca_dev, 0x0089);
        cit_send_x_00(gspca_dev, fkey);
        cit_send_00_04_06(gspca_dev);
        cit_read_reg(gspca_dev, 0x0126, 0);
        cit_send_FF_04_02(gspca_dev);
}

static void cit_PacketFormat2(struct gspca_dev *gspca_dev, u16 fkey, u16 val)
{
        cit_send_x_01_00_05(gspca_dev, 0x0088);
        cit_send_x_00_05(gspca_dev, fkey);
        cit_send_x_00_05_02(gspca_dev, val);
}

static void cit_model2_Packet2(struct gspca_dev *gspca_dev)
{
        cit_write_reg(gspca_dev, 0x00ff, 0x012d);
        cit_write_reg(gspca_dev, 0xfea3, 0x0124);
}

static void cit_model2_Packet1(struct gspca_dev *gspca_dev, u16 v1, u16 v2)
{
        cit_write_reg(gspca_dev, 0x00aa, 0x012d);
        cit_write_reg(gspca_dev, 0x00ff, 0x012e);
        cit_write_reg(gspca_dev, v1,     0x012f);
        cit_write_reg(gspca_dev, 0x00ff, 0x0130);
        cit_write_reg(gspca_dev, 0xc719, 0x0124);
        cit_write_reg(gspca_dev, v2,     0x0127);

        cit_model2_Packet2(gspca_dev);
}

/*
 * cit_model3_Packet1()
 *
 * 00_0078_012d
 * 00_0097_012f
 * 00_d141_0124
 * 00_0096_0127
 * 00_fea8_0124
*/
static void cit_model3_Packet1(struct gspca_dev *gspca_dev, u16 v1, u16 v2)
{
        cit_write_reg(gspca_dev, 0x0078, 0x012d);
        cit_write_reg(gspca_dev, v1,     0x012f);
        cit_write_reg(gspca_dev, 0xd141, 0x0124);
        cit_write_reg(gspca_dev, v2,     0x0127);
        cit_write_reg(gspca_dev, 0xfea8, 0x0124);
}

static void cit_model4_Packet1(struct gspca_dev *gspca_dev, u16 v1, u16 v2)
{
        cit_write_reg(gspca_dev, 0x00aa, 0x012d);
        cit_write_reg(gspca_dev, v1,     0x012f);
        cit_write_reg(gspca_dev, 0xd141, 0x0124);
        cit_write_reg(gspca_dev, v2,     0x0127);
        cit_write_reg(gspca_dev, 0xfea8, 0x0124);
}

static void cit_model4_BrightnessPacket(struct gspca_dev *gspca_dev, u16 val)
{
        cit_write_reg(gspca_dev, 0x00aa, 0x012d);
        cit_write_reg(gspca_dev, 0x0026, 0x012f);
        cit_write_reg(gspca_dev, 0xd141, 0x0124);
        cit_write_reg(gspca_dev, val,    0x0127);
        cit_write_reg(gspca_dev, 0x00aa, 0x0130);
        cit_write_reg(gspca_dev, 0x82a8, 0x0124);
        cit_write_reg(gspca_dev, 0x0038, 0x012d);
        cit_write_reg(gspca_dev, 0x0004, 0x012f);
        cit_write_reg(gspca_dev, 0xd145, 0x0124);
        cit_write_reg(gspca_dev, 0xfffa, 0x0124);
}

/* this function is called at probe time */
static int sd_config(struct gspca_dev *gspca_dev,
                     const struct usb_device_id *id)
{
        struct sd *sd = (struct sd *) gspca_dev;
        struct cam *cam;

        sd->model = id->driver_info;
        if (sd->model == CIT_MODEL3 && ibm_netcam_pro)
                sd->model = CIT_IBM_NETCAM_PRO;

        cam = &gspca_dev->cam;
        switch (sd->model) {
        case CIT_MODEL0:
                cam->cam_mode = model0_mode;
                cam->nmodes = ARRAY_SIZE(model0_mode);
                sd->sof_len = 4;
                break;
        case CIT_MODEL1:
                cam->cam_mode = cif_yuv_mode;
                cam->nmodes = ARRAY_SIZE(cif_yuv_mode);
                sd->sof_len = 4;
                break;
        case CIT_MODEL2:
                cam->cam_mode = model2_mode + 1; /* no 160x120 */
                cam->nmodes = 3;
                break;
        case CIT_MODEL3:
                cam->cam_mode = vga_yuv_mode;
                cam->nmodes = ARRAY_SIZE(vga_yuv_mode);
                sd->stop_on_control_change = 1;
                sd->sof_len = 4;
                break;
        case CIT_MODEL4:
                cam->cam_mode = model2_mode;
                cam->nmodes = ARRAY_SIZE(model2_mode);
                break;
        case CIT_IBM_NETCAM_PRO:
                cam->cam_mode = vga_yuv_mode;
                cam->nmodes = 2; /* no 640 x 480 */
                cam->input_flags = V4L2_IN_ST_VFLIP;
                sd->stop_on_control_change = 1;
                sd->sof_len = 4;
                break;
        }

        return 0;
}

static int cit_init_model0(struct gspca_dev *gspca_dev)
{
        cit_write_reg(gspca_dev, 0x0000, 0x0100); /* turn on led */
        cit_write_reg(gspca_dev, 0x0001, 0x0112); /* turn on autogain ? */
        cit_write_reg(gspca_dev, 0x0000, 0x0400);
        cit_write_reg(gspca_dev, 0x0001, 0x0400);
        cit_write_reg(gspca_dev, 0x0000, 0x0420);
        cit_write_reg(gspca_dev, 0x0001, 0x0420);
        cit_write_reg(gspca_dev, 0x000d, 0x0409);
        cit_write_reg(gspca_dev, 0x0002, 0x040a);
        cit_write_reg(gspca_dev, 0x0018, 0x0405);
        cit_write_reg(gspca_dev, 0x0008, 0x0435);
        cit_write_reg(gspca_dev, 0x0026, 0x040b);
        cit_write_reg(gspca_dev, 0x0007, 0x0437);
        cit_write_reg(gspca_dev, 0x0015, 0x042f);
        cit_write_reg(gspca_dev, 0x002b, 0x0439);
        cit_write_reg(gspca_dev, 0x0026, 0x043a);
        cit_write_reg(gspca_dev, 0x0008, 0x0438);
        cit_write_reg(gspca_dev, 0x001e, 0x042b);
        cit_write_reg(gspca_dev, 0x0041, 0x042c);

        return 0;
}

static int cit_init_ibm_netcam_pro(struct gspca_dev *gspca_dev)
{
        cit_read_reg(gspca_dev, 0x128, 1);
        cit_write_reg(gspca_dev, 0x0003, 0x0133);
        cit_write_reg(gspca_dev, 0x0000, 0x0117);
        cit_write_reg(gspca_dev, 0x0008, 0x0123);
        cit_write_reg(gspca_dev, 0x0000, 0x0100);
        cit_read_reg(gspca_dev, 0x0116, 0);
        cit_write_reg(gspca_dev, 0x0060, 0x0116);
        cit_write_reg(gspca_dev, 0x0002, 0x0112);
        cit_write_reg(gspca_dev, 0x0000, 0x0133);
        cit_write_reg(gspca_dev, 0x0000, 0x0123);
        cit_write_reg(gspca_dev, 0x0001, 0x0117);
        cit_write_reg(gspca_dev, 0x0040, 0x0108);
        cit_write_reg(gspca_dev, 0x0019, 0x012c);
        cit_write_reg(gspca_dev, 0x0060, 0x0116);
        cit_write_reg(gspca_dev, 0x0002, 0x0115);
        cit_write_reg(gspca_dev, 0x000b, 0x0115);

        cit_write_reg(gspca_dev, 0x0078, 0x012d);
        cit_write_reg(gspca_dev, 0x0001, 0x012f);
        cit_write_reg(gspca_dev, 0xd141, 0x0124);
        cit_write_reg(gspca_dev, 0x0079, 0x012d);
        cit_write_reg(gspca_dev, 0x00ff, 0x0130);
        cit_write_reg(gspca_dev, 0xcd41, 0x0124);
        cit_write_reg(gspca_dev, 0xfffa, 0x0124);
        cit_read_reg(gspca_dev, 0x0126, 1);

        cit_model3_Packet1(gspca_dev, 0x0000, 0x0000);
        cit_model3_Packet1(gspca_dev, 0x0000, 0x0001);
        cit_model3_Packet1(gspca_dev, 0x000b, 0x0000);
        cit_model3_Packet1(gspca_dev, 0x000c, 0x0008);
        cit_model3_Packet1(gspca_dev, 0x000d, 0x003a);
        cit_model3_Packet1(gspca_dev, 0x000e, 0x0060);
        cit_model3_Packet1(gspca_dev, 0x000f, 0x0060);
        cit_model3_Packet1(gspca_dev, 0x0010, 0x0008);
        cit_model3_Packet1(gspca_dev, 0x0011, 0x0004);
        cit_model3_Packet1(gspca_dev, 0x0012, 0x0028);
        cit_model3_Packet1(gspca_dev, 0x0013, 0x0002);
        cit_model3_Packet1(gspca_dev, 0x0014, 0x0000);
        cit_model3_Packet1(gspca_dev, 0x0015, 0x00fb);
        cit_model3_Packet1(gspca_dev, 0x0016, 0x0002);
        cit_model3_Packet1(gspca_dev, 0x0017, 0x0037);
        cit_model3_Packet1(gspca_dev, 0x0018, 0x0036);
        cit_model3_Packet1(gspca_dev, 0x001e, 0x0000);
        cit_model3_Packet1(gspca_dev, 0x001f, 0x0008);
        cit_model3_Packet1(gspca_dev, 0x0020, 0x00c1);
        cit_model3_Packet1(gspca_dev, 0x0021, 0x0034);
        cit_model3_Packet1(gspca_dev, 0x0022, 0x0034);
        cit_model3_Packet1(gspca_dev, 0x0025, 0x0002);
        cit_model3_Packet1(gspca_dev, 0x0028, 0x0022);
        cit_model3_Packet1(gspca_dev, 0x0029, 0x000a);
        cit_model3_Packet1(gspca_dev, 0x002b, 0x0000);
        cit_model3_Packet1(gspca_dev, 0x002c, 0x0000);
        cit_model3_Packet1(gspca_dev, 0x002d, 0x00ff);
        cit_model3_Packet1(gspca_dev, 0x002e, 0x00ff);
        cit_model3_Packet1(gspca_dev, 0x002f, 0x00ff);
        cit_model3_Packet1(gspca_dev, 0x0030, 0x00ff);
        cit_model3_Packet1(gspca_dev, 0x0031, 0x00ff);
        cit_model3_Packet1(gspca_dev, 0x0032, 0x0007);
        cit_model3_Packet1(gspca_dev, 0x0033, 0x0005);
        cit_model3_Packet1(gspca_dev, 0x0037, 0x0040);
        cit_model3_Packet1(gspca_dev, 0x0039, 0x0000);
        cit_model3_Packet1(gspca_dev, 0x003a, 0x0000);
        cit_model3_Packet1(gspca_dev, 0x003b, 0x0001);
        cit_model3_Packet1(gspca_dev, 0x003c, 0x0000);
        cit_model3_Packet1(gspca_dev, 0x0040, 0x000c);
        cit_model3_Packet1(gspca_dev, 0x0041, 0x00fb);
        cit_model3_Packet1(gspca_dev, 0x0042, 0x0002);
        cit_model3_Packet1(gspca_dev, 0x0043, 0x0000);
        cit_model3_Packet1(gspca_dev, 0x0045, 0x0000);
        cit_model3_Packet1(gspca_dev, 0x0046, 0x0000);
        cit_model3_Packet1(gspca_dev, 0x0047, 0x0000);
        cit_model3_Packet1(gspca_dev, 0x0048, 0x0000);
        cit_model3_Packet1(gspca_dev, 0x0049, 0x0000);

        cit_model3_Packet1(gspca_dev, 0x004a, 0x00ff);
        cit_model3_Packet1(gspca_dev, 0x004b, 0x00ff);
        cit_model3_Packet1(gspca_dev, 0x004c, 0x00ff);
        cit_model3_Packet1(gspca_dev, 0x004f, 0x0000);
        cit_model3_Packet1(gspca_dev, 0x0050, 0x0000);
        cit_model3_Packet1(gspca_dev, 0x0051, 0x0002);
        cit_model3_Packet1(gspca_dev, 0x0055, 0x0000);
        cit_model3_Packet1(gspca_dev, 0x0056, 0x0000);
        cit_model3_Packet1(gspca_dev, 0x0057, 0x0000);
        cit_model3_Packet1(gspca_dev, 0x0058, 0x0002);
        cit_model3_Packet1(gspca_dev, 0x0059, 0x0000);
        cit_model3_Packet1(gspca_dev, 0x005c, 0x0016);
        cit_model3_Packet1(gspca_dev, 0x005d, 0x0022);
        cit_model3_Packet1(gspca_dev, 0x005e, 0x003c);
        cit_model3_Packet1(gspca_dev, 0x005f, 0x0050);
        cit_model3_Packet1(gspca_dev, 0x0060, 0x0044);
        cit_model3_Packet1(gspca_dev, 0x0061, 0x0005);
        cit_model3_Packet1(gspca_dev, 0x006a, 0x007e);
        cit_model3_Packet1(gspca_dev, 0x006f, 0x0000);
        cit_model3_Packet1(gspca_dev, 0x0072, 0x001b);
        cit_model3_Packet1(gspca_dev, 0x0073, 0x0005);
        cit_model3_Packet1(gspca_dev, 0x0074, 0x000a);
        cit_model3_Packet1(gspca_dev, 0x0075, 0x001b);
        cit_model3_Packet1(gspca_dev, 0x0076, 0x002a);
        cit_model3_Packet1(gspca_dev, 0x0077, 0x003c);
        cit_model3_Packet1(gspca_dev, 0x0078, 0x0050);
        cit_model3_Packet1(gspca_dev, 0x007b, 0x0000);
        cit_model3_Packet1(gspca_dev, 0x007c, 0x0011);
        cit_model3_Packet1(gspca_dev, 0x007d, 0x0024);
        cit_model3_Packet1(gspca_dev, 0x007e, 0x0043);
        cit_model3_Packet1(gspca_dev, 0x007f, 0x005a);
        cit_model3_Packet1(gspca_dev, 0x0084, 0x0020);
        cit_model3_Packet1(gspca_dev, 0x0085, 0x0033);
        cit_model3_Packet1(gspca_dev, 0x0086, 0x000a);
        cit_model3_Packet1(gspca_dev, 0x0087, 0x0030);
        cit_model3_Packet1(gspca_dev, 0x0088, 0x0070);
        cit_model3_Packet1(gspca_dev, 0x008b, 0x0008);
        cit_model3_Packet1(gspca_dev, 0x008f, 0x0000);
        cit_model3_Packet1(gspca_dev, 0x0090, 0x0006);
        cit_model3_Packet1(gspca_dev, 0x0091, 0x0028);
        cit_model3_Packet1(gspca_dev, 0x0092, 0x005a);
        cit_model3_Packet1(gspca_dev, 0x0093, 0x0082);
        cit_model3_Packet1(gspca_dev, 0x0096, 0x0014);
        cit_model3_Packet1(gspca_dev, 0x0097, 0x0020);
        cit_model3_Packet1(gspca_dev, 0x0098, 0x0000);
        cit_model3_Packet1(gspca_dev, 0x00b0, 0x0046);
        cit_model3_Packet1(gspca_dev, 0x00b1, 0x0000);
        cit_model3_Packet1(gspca_dev, 0x00b2, 0x0000);
        cit_model3_Packet1(gspca_dev, 0x00b3, 0x0004);
        cit_model3_Packet1(gspca_dev, 0x00b4, 0x0007);
        cit_model3_Packet1(gspca_dev, 0x00b6, 0x0002);
        cit_model3_Packet1(gspca_dev, 0x00b7, 0x0004);
        cit_model3_Packet1(gspca_dev, 0x00bb, 0x0000);
        cit_model3_Packet1(gspca_dev, 0x00bc, 0x0001);
        cit_model3_Packet1(gspca_dev, 0x00bd, 0x0000);
        cit_model3_Packet1(gspca_dev, 0x00bf, 0x0000);
        cit_model3_Packet1(gspca_dev, 0x00c0, 0x00c8);
        cit_model3_Packet1(gspca_dev, 0x00c1, 0x0014);
        cit_model3_Packet1(gspca_dev, 0x00c2, 0x0001);
        cit_model3_Packet1(gspca_dev, 0x00c3, 0x0000);
        cit_model3_Packet1(gspca_dev, 0x00c4, 0x0004);
        cit_model3_Packet1(gspca_dev, 0x00cb, 0x00bf);
        cit_model3_Packet1(gspca_dev, 0x00cc, 0x00bf);
        cit_model3_Packet1(gspca_dev, 0x00cd, 0x00bf);
        cit_model3_Packet1(gspca_dev, 0x00ce, 0x0000);
        cit_model3_Packet1(gspca_dev, 0x00cf, 0x0020);
        cit_model3_Packet1(gspca_dev, 0x00d0, 0x0040);
        cit_model3_Packet1(gspca_dev, 0x00d1, 0x00bf);
        cit_model3_Packet1(gspca_dev, 0x00d1, 0x00bf);
        cit_model3_Packet1(gspca_dev, 0x00d2, 0x00bf);
        cit_model3_Packet1(gspca_dev, 0x00d3, 0x00bf);
        cit_model3_Packet1(gspca_dev, 0x00ea, 0x0008);
        cit_model3_Packet1(gspca_dev, 0x00eb, 0x0000);
        cit_model3_Packet1(gspca_dev, 0x00ec, 0x00e8);
        cit_model3_Packet1(gspca_dev, 0x00ed, 0x0001);
        cit_model3_Packet1(gspca_dev, 0x00ef, 0x0022);
        cit_model3_Packet1(gspca_dev, 0x00f0, 0x0000);
        cit_model3_Packet1(gspca_dev, 0x00f2, 0x0028);
        cit_model3_Packet1(gspca_dev, 0x00f4, 0x0002);
        cit_model3_Packet1(gspca_dev, 0x00f5, 0x0000);
        cit_model3_Packet1(gspca_dev, 0x00fa, 0x0000);
        cit_model3_Packet1(gspca_dev, 0x00fb, 0x0001);
        cit_model3_Packet1(gspca_dev, 0x00fc, 0x0000);
        cit_model3_Packet1(gspca_dev, 0x00fd, 0x0000);
        cit_model3_Packet1(gspca_dev, 0x00fe, 0x0000);
        cit_model3_Packet1(gspca_dev, 0x00ff, 0x0000);

        cit_model3_Packet1(gspca_dev, 0x00be, 0x0003);
        cit_model3_Packet1(gspca_dev, 0x00c8, 0x0000);
        cit_model3_Packet1(gspca_dev, 0x00c9, 0x0020);
        cit_model3_Packet1(gspca_dev, 0x00ca, 0x0040);
        cit_model3_Packet1(gspca_dev, 0x0053, 0x0001);
        cit_model3_Packet1(gspca_dev, 0x0082, 0x000e);
        cit_model3_Packet1(gspca_dev, 0x0083, 0x0020);
        cit_model3_Packet1(gspca_dev, 0x0034, 0x003c);
        cit_model3_Packet1(gspca_dev, 0x006e, 0x0055);
        cit_model3_Packet1(gspca_dev, 0x0062, 0x0005);
        cit_model3_Packet1(gspca_dev, 0x0063, 0x0008);
        cit_model3_Packet1(gspca_dev, 0x0066, 0x000a);
        cit_model3_Packet1(gspca_dev, 0x0067, 0x0006);
        cit_model3_Packet1(gspca_dev, 0x006b, 0x0010);
        cit_model3_Packet1(gspca_dev, 0x005a, 0x0001);
        cit_model3_Packet1(gspca_dev, 0x005b, 0x000a);
        cit_model3_Packet1(gspca_dev, 0x0023, 0x0006);
        cit_model3_Packet1(gspca_dev, 0x0026, 0x0004);
        cit_model3_Packet1(gspca_dev, 0x0036, 0x0069);
        cit_model3_Packet1(gspca_dev, 0x0038, 0x0064);
        cit_model3_Packet1(gspca_dev, 0x003d, 0x0003);
        cit_model3_Packet1(gspca_dev, 0x003e, 0x0001);
        cit_model3_Packet1(gspca_dev, 0x00b8, 0x0014);
        cit_model3_Packet1(gspca_dev, 0x00b9, 0x0014);
        cit_model3_Packet1(gspca_dev, 0x00e6, 0x0004);
        cit_model3_Packet1(gspca_dev, 0x00e8, 0x0001);

        return 0;
}

/* this function is called at probe and resume time */
static int sd_init(struct gspca_dev *gspca_dev)
{
        struct sd *sd = (struct sd *) gspca_dev;

        switch (sd->model) {
        case CIT_MODEL0:
                cit_init_model0(gspca_dev);
                sd_stop0(gspca_dev);
                break;
        case CIT_MODEL1:
        case CIT_MODEL2:
        case CIT_MODEL3:
        case CIT_MODEL4:
                break; /* All is done in sd_start */
        case CIT_IBM_NETCAM_PRO:
                cit_init_ibm_netcam_pro(gspca_dev);
                sd_stop0(gspca_dev);
                break;
        }
        return 0;
}

static int cit_set_brightness(struct gspca_dev *gspca_dev, s32 val)
{
        struct sd *sd = (struct sd *) gspca_dev;
        int i;

        switch (sd->model) {
        case CIT_MODEL0:
        case CIT_IBM_NETCAM_PRO:
                /* No (known) brightness control for these */
                break;
        case CIT_MODEL1:
                /* Model 1: Brightness range 0 - 63 */
                cit_Packet_Format1(gspca_dev, 0x0031, val);
                cit_Packet_Format1(gspca_dev, 0x0032, val);
                cit_Packet_Format1(gspca_dev, 0x0033, val);
                break;
        case CIT_MODEL2:
                /* Model 2: Brightness range 0x60 - 0xee */
                /* Scale 0 - 63 to 0x60 - 0xee */
                i = 0x60 + val * 2254 / 1000;
                cit_model2_Packet1(gspca_dev, 0x001a, i);
                break;
        case CIT_MODEL3:
                /* Model 3: Brightness range 'i' in [0x0C..0x3F] */
                i = val;
                if (i < 0x0c)
                        i = 0x0c;
                cit_model3_Packet1(gspca_dev, 0x0036, i);
                break;
        case CIT_MODEL4:
                /* Model 4: Brightness range 'i' in [0x04..0xb4] */
                /* Scale 0 - 63 to 0x04 - 0xb4 */
                i = 0x04 + val * 2794 / 1000;
                cit_model4_BrightnessPacket(gspca_dev, i);
                break;
        }

        return 0;
}

static int cit_set_contrast(struct gspca_dev *gspca_dev, s32 val)
{
        struct sd *sd = (struct sd *) gspca_dev;

        switch (sd->model) {
        case CIT_MODEL0: {
                int i;
                /* gain 0-15, 0-20 -> 0-15 */
                i = val * 1000 / 1333;
                cit_write_reg(gspca_dev, i, 0x0422);
                /* gain 0-31, may not be lower then 0x0422, 0-20 -> 0-31 */
                i = val * 2000 / 1333;
                cit_write_reg(gspca_dev, i, 0x0423);
                /* gain 0-127, may not be lower then 0x0423, 0-20 -> 0-63  */
                i = val * 4000 / 1333;
                cit_write_reg(gspca_dev, i, 0x0424);
                /* gain 0-127, may not be lower then 0x0424, , 0-20 -> 0-127 */
                i = val * 8000 / 1333;
                cit_write_reg(gspca_dev, i, 0x0425);
                break;
        }
        case CIT_MODEL2:
        case CIT_MODEL4:
                /* These models do not have this control. */
                break;
        case CIT_MODEL1:
        {
                /* Scale 0 - 20 to 15 - 0 */
                int i, new_contrast = (20 - val) * 1000 / 1333;
                for (i = 0; i < cit_model1_ntries; i++) {
                        cit_Packet_Format1(gspca_dev, 0x0014, new_contrast);
                        cit_send_FF_04_02(gspca_dev);
                }
                break;
        }
        case CIT_MODEL3:
        {       /* Preset hardware values */
                static const struct {
                        unsigned short cv1;
                        unsigned short cv2;
                        unsigned short cv3;
                } cv[7] = {
                        { 0x05, 0x05, 0x0f },   /* Minimum */
                        { 0x04, 0x04, 0x16 },
                        { 0x02, 0x03, 0x16 },
                        { 0x02, 0x08, 0x16 },
                        { 0x01, 0x0c, 0x16 },
                        { 0x01, 0x0e, 0x16 },
                        { 0x01, 0x10, 0x16 }    /* Maximum */
                };
                int i = val / 3;
                cit_model3_Packet1(gspca_dev, 0x0067, cv[i].cv1);
                cit_model3_Packet1(gspca_dev, 0x005b, cv[i].cv2);
                cit_model3_Packet1(gspca_dev, 0x005c, cv[i].cv3);
                break;
        }
        case CIT_IBM_NETCAM_PRO:
                cit_model3_Packet1(gspca_dev, 0x005b, val + 1);
                break;
        }
        return 0;
}

static int cit_set_hue(struct gspca_dev *gspca_dev, s32 val)
{
        struct sd *sd = (struct sd *) gspca_dev;

        switch (sd->model) {
        case CIT_MODEL0:
        case CIT_MODEL1:
        case CIT_IBM_NETCAM_PRO:
                /* No hue control for these models */
                break;
        case CIT_MODEL2:
                cit_model2_Packet1(gspca_dev, 0x0024, val);
                /* cit_model2_Packet1(gspca_dev, 0x0020, sat); */
                break;
        case CIT_MODEL3: {
                /* Model 3: Brightness range 'i' in [0x05..0x37] */
                /* TESTME according to the ibmcam driver this does not work */
                if (0) {
                        /* Scale 0 - 127 to 0x05 - 0x37 */
                        int i = 0x05 + val * 1000 / 2540;
                        cit_model3_Packet1(gspca_dev, 0x007e, i);
                }
                break;
        }
        case CIT_MODEL4:
                /* HDG: taken from ibmcam, setting the color gains does not
                 * really belong here.
                 *
                 * I am not sure r/g/b_gain variables exactly control gain
                 * of those channels. Most likely they subtly change some
                 * very internal image processing settings in the camera.
                 * In any case, here is what they do, and feel free to tweak:
                 *
                 * r_gain: seriously affects red gain
                 * g_gain: seriously affects green gain
                 * b_gain: seriously affects blue gain
                 * hue: changes average color from violet (0) to red (0xFF)
                 */
                cit_write_reg(gspca_dev, 0x00aa, 0x012d);
                cit_write_reg(gspca_dev, 0x001e, 0x012f);
                cit_write_reg(gspca_dev, 0xd141, 0x0124);
                cit_write_reg(gspca_dev,    160, 0x0127);  /* Green gain */
                cit_write_reg(gspca_dev,    160, 0x012e);  /* Red gain */
                cit_write_reg(gspca_dev,    160, 0x0130);  /* Blue gain */
                cit_write_reg(gspca_dev, 0x8a28, 0x0124);
                cit_write_reg(gspca_dev, val, 0x012d); /* Hue */
                cit_write_reg(gspca_dev, 0xf545, 0x0124);
                break;
        }
        return 0;
}

static int cit_set_sharpness(struct gspca_dev *gspca_dev, s32 val)
{
        struct sd *sd = (struct sd *) gspca_dev;

        switch (sd->model) {
        case CIT_MODEL0:
        case CIT_MODEL2:
        case CIT_MODEL4:
        case CIT_IBM_NETCAM_PRO:
                /* These models do not have this control */
                break;
        case CIT_MODEL1: {
                int i;
                static const unsigned short sa[] = {
                        0x11, 0x13, 0x16, 0x18, 0x1a, 0x8, 0x0a };

                for (i = 0; i < cit_model1_ntries; i++)
                        cit_PacketFormat2(gspca_dev, 0x0013, sa[val]);
                break;
        }
        case CIT_MODEL3:
        {       /*
                 * "Use a table of magic numbers.
                 *  This setting doesn't really change much.
                 *  But that's how Windows does it."
                 */
                static const struct {
                        unsigned short sv1;
                        unsigned short sv2;
                        unsigned short sv3;
                        unsigned short sv4;
                } sv[7] = {
                        { 0x00, 0x00, 0x05, 0x14 },     /* Smoothest */
                        { 0x01, 0x04, 0x05, 0x14 },
                        { 0x02, 0x04, 0x05, 0x14 },
                        { 0x03, 0x04, 0x05, 0x14 },
                        { 0x03, 0x05, 0x05, 0x14 },
                        { 0x03, 0x06, 0x05, 0x14 },
                        { 0x03, 0x07, 0x05, 0x14 }      /* Sharpest */
                };
                cit_model3_Packet1(gspca_dev, 0x0060, sv[val].sv1);
                cit_model3_Packet1(gspca_dev, 0x0061, sv[val].sv2);
                cit_model3_Packet1(gspca_dev, 0x0062, sv[val].sv3);
                cit_model3_Packet1(gspca_dev, 0x0063, sv[val].sv4);
                break;
        }
        }
        return 0;
}

/*
 * cit_set_lighting()
 *
 * Camera model 1:
 * We have 3 levels of lighting conditions: 0=Bright, 1=Medium, 2=Low.
 *
 * Camera model 2:
 * We have 16 levels of lighting, 0 for bright light and up to 15 for
 * low light. But values above 5 or so are useless because camera is
 * not really capable to produce anything worth viewing at such light.
 * This setting may be altered only in certain camera state.
 *
 * Low lighting forces slower FPS.
 *
 * History:
 * 1/5/00   Created.
 * 2/20/00  Added support for Model 2 cameras.
 */
static void cit_set_lighting(struct gspca_dev *gspca_dev, s32 val)
{
        struct sd *sd = (struct sd *) gspca_dev;

        switch (sd->model) {
        case CIT_MODEL0:
        case CIT_MODEL2:
        case CIT_MODEL3:
        case CIT_MODEL4:
        case CIT_IBM_NETCAM_PRO:
                break;
        case CIT_MODEL1: {
                int i;
                for (i = 0; i < cit_model1_ntries; i++)
                        cit_Packet_Format1(gspca_dev, 0x0027, val);
                break;
        }
        }
}

static void cit_set_hflip(struct gspca_dev *gspca_dev, s32 val)
{
        struct sd *sd = (struct sd *) gspca_dev;

        switch (sd->model) {
        case CIT_MODEL0:
                if (val)
                        cit_write_reg(gspca_dev, 0x0020, 0x0115);
                else
                        cit_write_reg(gspca_dev, 0x0040, 0x0115);
                break;
        case CIT_MODEL1:
        case CIT_MODEL2:
        case CIT_MODEL3:
        case CIT_MODEL4:
        case CIT_IBM_NETCAM_PRO:
                break;
        }
}

static int cit_restart_stream(struct gspca_dev *gspca_dev)
{
        struct sd *sd = (struct sd *) gspca_dev;

        switch (sd->model) {
        case CIT_MODEL0:
        case CIT_MODEL1:
                cit_write_reg(gspca_dev, 0x0001, 0x0114);
                /* Fall through */
        case CIT_MODEL2:
        case CIT_MODEL4:
                cit_write_reg(gspca_dev, 0x00c0, 0x010c); /* Go! */
                usb_clear_halt(gspca_dev->dev, gspca_dev->urb[0]->pipe);
                break;
        case CIT_MODEL3:
        case CIT_IBM_NETCAM_PRO:
                cit_write_reg(gspca_dev, 0x0001, 0x0114);
                cit_write_reg(gspca_dev, 0x00c0, 0x010c); /* Go! */
                usb_clear_halt(gspca_dev->dev, gspca_dev->urb[0]->pipe);
                /* Clear button events from while we were not streaming */
                cit_write_reg(gspca_dev, 0x0001, 0x0113);
                break;
        }

        sd->sof_read = 0;

        return 0;
}

static int cit_get_packet_size(struct gspca_dev *gspca_dev)
{
        struct usb_host_interface *alt;
        struct usb_interface *intf;

        intf = usb_ifnum_to_if(gspca_dev->dev, gspca_dev->iface);
        alt = usb_altnum_to_altsetting(intf, gspca_dev->alt);
        if (!alt) {
                pr_err("Couldn't get altsetting\n");
                return -EIO;
        }

        if (alt->desc.bNumEndpoints < 1)
                return -ENODEV;

        return le16_to_cpu(alt->endpoint[0].desc.wMaxPacketSize);
}

/* Calculate the clockdiv giving us max fps given the available bandwidth */
static int cit_get_clock_div(struct gspca_dev *gspca_dev)
{
        int clock_div = 7; /* 0=30 1=25 2=20 3=15 4=12 5=7.5 6=6 7=3fps ?? */
        int fps[8] = { 30, 25, 20, 15, 12, 8, 6, 3 };
        int packet_size;

        packet_size = cit_get_packet_size(gspca_dev);
        if (packet_size < 0)
                return packet_size;

        while (clock_div > 3 &&
                        1000 * packet_size >
                        gspca_dev->pixfmt.width * gspca_dev->pixfmt.height *
                        fps[clock_div - 1] * 3 / 2)
                clock_div--;

        gspca_dbg(gspca_dev, D_PROBE,
                  "PacketSize: %d, res: %dx%d -> using clockdiv: %d (%d fps)\n",
                  packet_size,
                  gspca_dev->pixfmt.width, gspca_dev->pixfmt.height,
                  clock_div, fps[clock_div]);

        return clock_div;
}

static int cit_start_model0(struct gspca_dev *gspca_dev)
{
        const unsigned short compression = 0; /* 0=none, 7=best frame rate */
        int clock_div;

        clock_div = cit_get_clock_div(gspca_dev);
        if (clock_div < 0)
                return clock_div;

        cit_write_reg(gspca_dev, 0x0000, 0x0100); /* turn on led */
        cit_write_reg(gspca_dev, 0x0003, 0x0438);
        cit_write_reg(gspca_dev, 0x001e, 0x042b);
        cit_write_reg(gspca_dev, 0x0041, 0x042c);
        cit_write_reg(gspca_dev, 0x0008, 0x0436);
        cit_write_reg(gspca_dev, 0x0024, 0x0403);
        cit_write_reg(gspca_dev, 0x002c, 0x0404);
        cit_write_reg(gspca_dev, 0x0002, 0x0426);
        cit_write_reg(gspca_dev, 0x0014, 0x0427);

        switch (gspca_dev->pixfmt.width) {
        case 160: /* 160x120 */
                cit_write_reg(gspca_dev, 0x0004, 0x010b);
                cit_write_reg(gspca_dev, 0x0001, 0x010a);
                cit_write_reg(gspca_dev, 0x0010, 0x0102);
                cit_write_reg(gspca_dev, 0x00a0, 0x0103);
                cit_write_reg(gspca_dev, 0x0000, 0x0104);
                cit_write_reg(gspca_dev, 0x0078, 0x0105);
                break;

        case 176: /* 176x144 */
                cit_write_reg(gspca_dev, 0x0006, 0x010b);
                cit_write_reg(gspca_dev, 0x0000, 0x010a);
                cit_write_reg(gspca_dev, 0x0005, 0x0102);
                cit_write_reg(gspca_dev, 0x00b0, 0x0103);
                cit_write_reg(gspca_dev, 0x0000, 0x0104);
                cit_write_reg(gspca_dev, 0x0090, 0x0105);
                break;

        case 320: /* 320x240 */
                cit_write_reg(gspca_dev, 0x0008, 0x010b);
                cit_write_reg(gspca_dev, 0x0004, 0x010a);
                cit_write_reg(gspca_dev, 0x0005, 0x0102);
                cit_write_reg(gspca_dev, 0x00a0, 0x0103);
                cit_write_reg(gspca_dev, 0x0010, 0x0104);
                cit_write_reg(gspca_dev, 0x0078, 0x0105);
                break;
        }

        cit_write_reg(gspca_dev, compression, 0x0109);
        cit_write_reg(gspca_dev, clock_div, 0x0111);

        return 0;
}

static int cit_start_model1(struct gspca_dev *gspca_dev)
{
        struct sd *sd = (struct sd *) gspca_dev;
        int i, clock_div;

        clock_div = cit_get_clock_div(gspca_dev);
        if (clock_div < 0)
                return clock_div;

        cit_read_reg(gspca_dev, 0x0128, 1);
        cit_read_reg(gspca_dev, 0x0100, 0);
        cit_write_reg(gspca_dev, 0x01, 0x0100); /* LED On  */
        cit_read_reg(gspca_dev, 0x0100, 0);
        cit_write_reg(gspca_dev, 0x81, 0x0100); /* LED Off */
        cit_read_reg(gspca_dev, 0x0100, 0);
        cit_write_reg(gspca_dev, 0x01, 0x0100); /* LED On  */
        cit_write_reg(gspca_dev, 0x01, 0x0108);

        cit_write_reg(gspca_dev, 0x03, 0x0112);
        cit_read_reg(gspca_dev, 0x0115, 0);
        cit_write_reg(gspca_dev, 0x06, 0x0115);
        cit_read_reg(gspca_dev, 0x0116, 0);
        cit_write_reg(gspca_dev, 0x44, 0x0116);
        cit_read_reg(gspca_dev, 0x0116, 0);
        cit_write_reg(gspca_dev, 0x40, 0x0116);
        cit_read_reg(gspca_dev, 0x0115, 0);
        cit_write_reg(gspca_dev, 0x0e, 0x0115);
        cit_write_reg(gspca_dev, 0x19, 0x012c);

        cit_Packet_Format1(gspca_dev, 0x00, 0x1e);
        cit_Packet_Format1(gspca_dev, 0x39, 0x0d);
        cit_Packet_Format1(gspca_dev, 0x39, 0x09);
        cit_Packet_Format1(gspca_dev, 0x3b, 0x00);
        cit_Packet_Format1(gspca_dev, 0x28, 0x22);
        cit_Packet_Format1(gspca_dev, 0x27, 0x00);
        cit_Packet_Format1(gspca_dev, 0x2b, 0x1f);
        cit_Packet_Format1(gspca_dev, 0x39, 0x08);

        for (i = 0; i < cit_model1_ntries; i++)
                cit_Packet_Format1(gspca_dev, 0x2c, 0x00);

        for (i = 0; i < cit_model1_ntries; i++)
                cit_Packet_Format1(gspca_dev, 0x30, 0x14);

        cit_PacketFormat2(gspca_dev, 0x39, 0x02);
        cit_PacketFormat2(gspca_dev, 0x01, 0xe1);
        cit_PacketFormat2(gspca_dev, 0x02, 0xcd);
        cit_PacketFormat2(gspca_dev, 0x03, 0xcd);
        cit_PacketFormat2(gspca_dev, 0x04, 0xfa);
        cit_PacketFormat2(gspca_dev, 0x3f, 0xff);
        cit_PacketFormat2(gspca_dev, 0x39, 0x00);

        cit_PacketFormat2(gspca_dev, 0x39, 0x02);
        cit_PacketFormat2(gspca_dev, 0x0a, 0x37);
        cit_PacketFormat2(gspca_dev, 0x0b, 0xb8);
        cit_PacketFormat2(gspca_dev, 0x0c, 0xf3);
        cit_PacketFormat2(gspca_dev, 0x0d, 0xe3);
        cit_PacketFormat2(gspca_dev, 0x0e, 0x0d);
        cit_PacketFormat2(gspca_dev, 0x0f, 0xf2);
        cit_PacketFormat2(gspca_dev, 0x10, 0xd5);
        cit_PacketFormat2(gspca_dev, 0x11, 0xba);
        cit_PacketFormat2(gspca_dev, 0x12, 0x53);
        cit_PacketFormat2(gspca_dev, 0x3f, 0xff);
        cit_PacketFormat2(gspca_dev, 0x39, 0x00);

        cit_PacketFormat2(gspca_dev, 0x39, 0x02);
        cit_PacketFormat2(gspca_dev, 0x16, 0x00);
        cit_PacketFormat2(gspca_dev, 0x17, 0x28);
        cit_PacketFormat2(gspca_dev, 0x18, 0x7d);
        cit_PacketFormat2(gspca_dev, 0x19, 0xbe);
        cit_PacketFormat2(gspca_dev, 0x3f, 0xff);
        cit_PacketFormat2(gspca_dev, 0x39, 0x00);

        for (i = 0; i < cit_model1_ntries; i++)
                cit_Packet_Format1(gspca_dev, 0x00, 0x18);
        for (i = 0; i < cit_model1_ntries; i++)
                cit_Packet_Format1(gspca_dev, 0x13, 0x18);
        for (i = 0; i < cit_model1_ntries; i++)
                cit_Packet_Format1(gspca_dev, 0x14, 0x06);

        /* TESTME These are handled through controls
           KEEP until someone can test leaving this out is ok */
        if (0) {
                /* This is default brightness */
                for (i = 0; i < cit_model1_ntries; i++)
                        cit_Packet_Format1(gspca_dev, 0x31, 0x37);
                for (i = 0; i < cit_model1_ntries; i++)
                        cit_Packet_Format1(gspca_dev, 0x32, 0x46);
                for (i = 0; i < cit_model1_ntries; i++)
                        cit_Packet_Format1(gspca_dev, 0x33, 0x55);
        }

        cit_Packet_Format1(gspca_dev, 0x2e, 0x04);
        for (i = 0; i < cit_model1_ntries; i++)
                cit_Packet_Format1(gspca_dev, 0x2d, 0x04);
        for (i = 0; i < cit_model1_ntries; i++)
                cit_Packet_Format1(gspca_dev, 0x29, 0x80);
        cit_Packet_Format1(gspca_dev, 0x2c, 0x01);
        cit_Packet_Format1(gspca_dev, 0x30, 0x17);
        cit_Packet_Format1(gspca_dev, 0x39, 0x08);
        for (i = 0; i < cit_model1_ntries; i++)
                cit_Packet_Format1(gspca_dev, 0x34, 0x00);

        cit_write_reg(gspca_dev, 0x00, 0x0101);
        cit_write_reg(gspca_dev, 0x00, 0x010a);

        switch (gspca_dev->pixfmt.width) {
        case 128: /* 128x96 */
                cit_write_reg(gspca_dev, 0x80, 0x0103);
                cit_write_reg(gspca_dev, 0x60, 0x0105);
                cit_write_reg(gspca_dev, 0x0c, 0x010b);
                cit_write_reg(gspca_dev, 0x04, 0x011b); /* Same everywhere */
                cit_write_reg(gspca_dev, 0x0b, 0x011d);
                cit_write_reg(gspca_dev, 0x00, 0x011e); /* Same everywhere */
                cit_write_reg(gspca_dev, 0x00, 0x0129);
                break;
        case 176: /* 176x144 */
                cit_write_reg(gspca_dev, 0xb0, 0x0103);
                cit_write_reg(gspca_dev, 0x8f, 0x0105);
                cit_write_reg(gspca_dev, 0x06, 0x010b);
                cit_write_reg(gspca_dev, 0x04, 0x011b); /* Same everywhere */
                cit_write_reg(gspca_dev, 0x0d, 0x011d);
                cit_write_reg(gspca_dev, 0x00, 0x011e); /* Same everywhere */
                cit_write_reg(gspca_dev, 0x03, 0x0129);
                break;
        case 352: /* 352x288 */
                cit_write_reg(gspca_dev, 0xb0, 0x0103);
                cit_write_reg(gspca_dev, 0x90, 0x0105);
                cit_write_reg(gspca_dev, 0x02, 0x010b);
                cit_write_reg(gspca_dev, 0x04, 0x011b); /* Same everywhere */
                cit_write_reg(gspca_dev, 0x05, 0x011d);
                cit_write_reg(gspca_dev, 0x00, 0x011e); /* Same everywhere */
                cit_write_reg(gspca_dev, 0x00, 0x0129);
                break;
        }

        cit_write_reg(gspca_dev, 0xff, 0x012b);

        /* TESTME These are handled through controls
           KEEP until someone can test leaving this out is ok */
        if (0) {
                /* This is another brightness - don't know why */
                for (i = 0; i < cit_model1_ntries; i++)
                        cit_Packet_Format1(gspca_dev, 0x31, 0xc3);
                for (i = 0; i < cit_model1_ntries; i++)
                        cit_Packet_Format1(gspca_dev, 0x32, 0xd2);
                for (i = 0; i < cit_model1_ntries; i++)
                        cit_Packet_Format1(gspca_dev, 0x33, 0xe1);

                /* Default contrast */
                for (i = 0; i < cit_model1_ntries; i++)
                        cit_Packet_Format1(gspca_dev, 0x14, 0x0a);

                /* Default sharpness */
                for (i = 0; i < cit_model1_ntries2; i++)
                        cit_PacketFormat2(gspca_dev, 0x13, 0x1a);

                /* Default lighting conditions */
                cit_Packet_Format1(gspca_dev, 0x0027,
                                   v4l2_ctrl_g_ctrl(sd->lighting));
        }

        /* Assorted init */
        switch (gspca_dev->pixfmt.width) {
        case 128: /* 128x96 */
                cit_Packet_Format1(gspca_dev, 0x2b, 0x1e);
                cit_write_reg(gspca_dev, 0xc9, 0x0119); /* Same everywhere */
                cit_write_reg(gspca_dev, 0x80, 0x0109); /* Same everywhere */
                cit_write_reg(gspca_dev, 0x36, 0x0102);
                cit_write_reg(gspca_dev, 0x1a, 0x0104);
                cit_write_reg(gspca_dev, 0x04, 0x011a); /* Same everywhere */
                cit_write_reg(gspca_dev, 0x2b, 0x011c);
                cit_write_reg(gspca_dev, 0x23, 0x012a); /* Same everywhere */
                break;
        case 176: /* 176x144 */
                cit_Packet_Format1(gspca_dev, 0x2b, 0x1e);
                cit_write_reg(gspca_dev, 0xc9, 0x0119); /* Same everywhere */
                cit_write_reg(gspca_dev, 0x80, 0x0109); /* Same everywhere */
                cit_write_reg(gspca_dev, 0x04, 0x0102);
                cit_write_reg(gspca_dev, 0x02, 0x0104);
                cit_write_reg(gspca_dev, 0x04, 0x011a); /* Same everywhere */
                cit_write_reg(gspca_dev, 0x2b, 0x011c);
                cit_write_reg(gspca_dev, 0x23, 0x012a); /* Same everywhere */
                break;
        case 352: /* 352x288 */
                cit_Packet_Format1(gspca_dev, 0x2b, 0x1f);
                cit_write_reg(gspca_dev, 0xc9, 0x0119); /* Same everywhere */
                cit_write_reg(gspca_dev, 0x80, 0x0109); /* Same everywhere */
                cit_write_reg(gspca_dev, 0x08, 0x0102);
                cit_write_reg(gspca_dev, 0x01, 0x0104);
                cit_write_reg(gspca_dev, 0x04, 0x011a); /* Same everywhere */
                cit_write_reg(gspca_dev, 0x2f, 0x011c);
                cit_write_reg(gspca_dev, 0x23, 0x012a); /* Same everywhere */
                break;
        }

        cit_write_reg(gspca_dev, 0x01, 0x0100); /* LED On  */
        cit_write_reg(gspca_dev, clock_div, 0x0111);

        return 0;
}

static int cit_start_model2(struct gspca_dev *gspca_dev)
{
        struct sd *sd = (struct sd *) gspca_dev;
        int clock_div = 0;

        cit_write_reg(gspca_dev, 0x0000, 0x0100);       /* LED on */
        cit_read_reg(gspca_dev, 0x0116, 0);
        cit_write_reg(gspca_dev, 0x0060, 0x0116);
        cit_write_reg(gspca_dev, 0x0002, 0x0112);
        cit_write_reg(gspca_dev, 0x00bc, 0x012c);
        cit_write_reg(gspca_dev, 0x0008, 0x012b);
        cit_write_reg(gspca_dev, 0x0000, 0x0108);
        cit_write_reg(gspca_dev, 0x0001, 0x0133);
        cit_write_reg(gspca_dev, 0x0001, 0x0102);
        switch (gspca_dev->pixfmt.width) {
        case 176: /* 176x144 */
                cit_write_reg(gspca_dev, 0x002c, 0x0103);       /* All except 320x240 */
                cit_write_reg(gspca_dev, 0x0000, 0x0104);       /* Same */
                cit_write_reg(gspca_dev, 0x0024, 0x0105);       /* 176x144, 352x288 */
                cit_write_reg(gspca_dev, 0x00b9, 0x010a);       /* Unique to this mode */
                cit_write_reg(gspca_dev, 0x0038, 0x0119);       /* Unique to this mode */
                /* TESTME HDG: this does not seem right
                   (it is 2 for all other resolutions) */
                sd->sof_len = 10;
                break;
        case 320: /* 320x240 */
                cit_write_reg(gspca_dev, 0x0028, 0x0103);       /* Unique to this mode */
                cit_write_reg(gspca_dev, 0x0000, 0x0104);       /* Same */
                cit_write_reg(gspca_dev, 0x001e, 0x0105);       /* 320x240, 352x240 */
                cit_write_reg(gspca_dev, 0x0039, 0x010a);       /* All except 176x144 */
                cit_write_reg(gspca_dev, 0x0070, 0x0119);       /* All except 176x144 */
                sd->sof_len = 2;
                break;
#if 0
        case VIDEOSIZE_352x240:
                cit_write_reg(gspca_dev, 0x002c, 0x0103);       /* All except 320x240 */
                cit_write_reg(gspca_dev, 0x0000, 0x0104);       /* Same */
                cit_write_reg(gspca_dev, 0x001e, 0x0105);       /* 320x240, 352x240 */
                cit_write_reg(gspca_dev, 0x0039, 0x010a);       /* All except 176x144 */
                cit_write_reg(gspca_dev, 0x0070, 0x0119);       /* All except 176x144 */
                sd->sof_len = 2;
                break;
#endif
        case 352: /* 352x288 */
                cit_write_reg(gspca_dev, 0x002c, 0x0103);       /* All except 320x240 */
                cit_write_reg(gspca_dev, 0x0000, 0x0104);       /* Same */
                cit_write_reg(gspca_dev, 0x0024, 0x0105);       /* 176x144, 352x288 */
                cit_write_reg(gspca_dev, 0x0039, 0x010a);       /* All except 176x144 */
                cit_write_reg(gspca_dev, 0x0070, 0x0119);       /* All except 176x144 */
                sd->sof_len = 2;
                break;
        }

        cit_write_reg(gspca_dev, 0x0000, 0x0100);       /* LED on */

        switch (gspca_dev->pixfmt.width) {
        case 176: /* 176x144 */
                cit_write_reg(gspca_dev, 0x0050, 0x0111);
                cit_write_reg(gspca_dev, 0x00d0, 0x0111);
                break;
        case 320: /* 320x240 */
        case 352: /* 352x288 */
                cit_write_reg(gspca_dev, 0x0040, 0x0111);
                cit_write_reg(gspca_dev, 0x00c0, 0x0111);
                break;
        }
        cit_write_reg(gspca_dev, 0x009b, 0x010f);
        cit_write_reg(gspca_dev, 0x00bb, 0x010f);

        /*
         * Hardware settings, may affect CMOS sensor; not user controls!
         * -------------------------------------------------------------
         * 0x0004: no effect
         * 0x0006: hardware effect
         * 0x0008: no effect
         * 0x000a: stops video stream, probably important h/w setting
         * 0x000c: changes color in hardware manner (not user setting)
         * 0x0012: changes number of colors (does not affect speed)
         * 0x002a: no effect
         * 0x002c: hardware setting (related to scan lines)
         * 0x002e: stops video stream, probably important h/w setting
         */
        cit_model2_Packet1(gspca_dev, 0x000a, 0x005c);
        cit_model2_Packet1(gspca_dev, 0x0004, 0x0000);
        cit_model2_Packet1(gspca_dev, 0x0006, 0x00fb);
        cit_model2_Packet1(gspca_dev, 0x0008, 0x0000);
        cit_model2_Packet1(gspca_dev, 0x000c, 0x0009);
        cit_model2_Packet1(gspca_dev, 0x0012, 0x000a);
        cit_model2_Packet1(gspca_dev, 0x002a, 0x0000);
        cit_model2_Packet1(gspca_dev, 0x002c, 0x0000);
        cit_model2_Packet1(gspca_dev, 0x002e, 0x0008);

        /*
         * Function 0x0030 pops up all over the place. Apparently
         * it is a hardware control register, with every bit assigned to
         * do something.
         */
        cit_model2_Packet1(gspca_dev, 0x0030, 0x0000);

        /*
         * Magic control of CMOS sensor. Only lower values like
         * 0-3 work, and picture shifts left or right. Don't change.
         */
        switch (gspca_dev->pixfmt.width) {
        case 176: /* 176x144 */
                cit_model2_Packet1(gspca_dev, 0x0014, 0x0002);
                cit_model2_Packet1(gspca_dev, 0x0016, 0x0002); /* Horizontal shift */
                cit_model2_Packet1(gspca_dev, 0x0018, 0x004a); /* Another hardware setting */
                clock_div = 6;
                break;
        case 320: /* 320x240 */
                cit_model2_Packet1(gspca_dev, 0x0014, 0x0009);
                cit_model2_Packet1(gspca_dev, 0x0016, 0x0005); /* Horizontal shift */
                cit_model2_Packet1(gspca_dev, 0x0018, 0x0044); /* Another hardware setting */
                clock_div = 8;
                break;
#if 0
        case VIDEOSIZE_352x240:
                /* This mode doesn't work as Windows programs it; changed to work */
                cit_model2_Packet1(gspca_dev, 0x0014, 0x0009); /* Windows sets this to 8 */
                cit_model2_Packet1(gspca_dev, 0x0016, 0x0003); /* Horizontal shift */
                cit_model2_Packet1(gspca_dev, 0x0018, 0x0044); /* Windows sets this to 0x0045 */
                clock_div = 10;
                break;
#endif
        case 352: /* 352x288 */
                cit_model2_Packet1(gspca_dev, 0x0014, 0x0003);
                cit_model2_Packet1(gspca_dev, 0x0016, 0x0002); /* Horizontal shift */
                cit_model2_Packet1(gspca_dev, 0x0018, 0x004a); /* Another hardware setting */
                clock_div = 16;
                break;
        }

        /* TESTME These are handled through controls
           KEEP until someone can test leaving this out is ok */
        if (0)
                cit_model2_Packet1(gspca_dev, 0x001a, 0x005a);

        /*
         * We have our own frame rate setting varying from 0 (slowest) to 6
         * (fastest). The camera model 2 allows frame rate in range [0..0x1F]
         # where 0 is also the slowest setting. However for all practical
         # reasons high settings make no sense because USB is not fast enough
         # to support high FPS. Be aware that the picture datastream will be
         # severely disrupted if you ask for frame rate faster than allowed
         # for the video size - see below:
         *
         * Allowable ranges (obtained experimentally on OHCI, K6-3, 450 MHz):
         * -----------------------------------------------------------------
         * 176x144: [6..31]
         * 320x240: [8..31]
         * 352x240: [10..31]
         * 352x288: [16..31] I have to raise lower threshold for stability...
         *
         * As usual, slower FPS provides better sensitivity.
         */
        cit_model2_Packet1(gspca_dev, 0x001c, clock_div);

        /*
         * This setting does not visibly affect pictures; left it here
         * because it was present in Windows USB data stream. This function
         * does not allow arbitrary values and apparently is a bit mask, to
         * be activated only at appropriate time. Don't change it randomly!
         */
        switch (gspca_dev->pixfmt.width) {
        case 176: /* 176x144 */
                cit_model2_Packet1(gspca_dev, 0x0026, 0x00c2);
                break;
        case 320: /* 320x240 */
                cit_model2_Packet1(gspca_dev, 0x0026, 0x0044);
                break;
#if 0
        case VIDEOSIZE_352x240:
                cit_model2_Packet1(gspca_dev, 0x0026, 0x0046);
                break;
#endif
        case 352: /* 352x288 */
                cit_model2_Packet1(gspca_dev, 0x0026, 0x0048);
                break;
        }

        cit_model2_Packet1(gspca_dev, 0x0028, v4l2_ctrl_g_ctrl(sd->lighting));
        /* model2 cannot change the backlight compensation while streaming */
        v4l2_ctrl_grab(sd->lighting, true);

        /* color balance rg2 */
        cit_model2_Packet1(gspca_dev, 0x001e, 0x002f);
        /* saturation */
        cit_model2_Packet1(gspca_dev, 0x0020, 0x0034);
        /* color balance yb */
        cit_model2_Packet1(gspca_dev, 0x0022, 0x00a0);

        /* Hardware control command */
        cit_model2_Packet1(gspca_dev, 0x0030, 0x0004);

        return 0;
}

static int cit_start_model3(struct gspca_dev *gspca_dev)
{
        const unsigned short compression = 0; /* 0=none, 7=best frame rate */
        int i, clock_div = 0;

        /* HDG not in ibmcam driver, added to see if it helps with
           auto-detecting between model3 and ibm netcamera pro */
        cit_read_reg(gspca_dev, 0x128, 1);

        cit_write_reg(gspca_dev, 0x0000, 0x0100);
        cit_read_reg(gspca_dev, 0x0116, 0);
        cit_write_reg(gspca_dev, 0x0060, 0x0116);
        cit_write_reg(gspca_dev, 0x0002, 0x0112);
        cit_write_reg(gspca_dev, 0x0000, 0x0123);
        cit_write_reg(gspca_dev, 0x0001, 0x0117);
        cit_write_reg(gspca_dev, 0x0040, 0x0108);
        cit_write_reg(gspca_dev, 0x0019, 0x012c);
        cit_write_reg(gspca_dev, 0x0060, 0x0116);
        cit_write_reg(gspca_dev, 0x0002, 0x0115);
        cit_write_reg(gspca_dev, 0x0003, 0x0115);
        cit_read_reg(gspca_dev, 0x0115, 0);
        cit_write_reg(gspca_dev, 0x000b, 0x0115);

        /* TESTME HDG not in ibmcam driver, added to see if it helps with
           auto-detecting between model3 and ibm netcamera pro */
        if (0) {
                cit_write_reg(gspca_dev, 0x0078, 0x012d);
                cit_write_reg(gspca_dev, 0x0001, 0x012f);
                cit_write_reg(gspca_dev, 0xd141, 0x0124);
                cit_write_reg(gspca_dev, 0x0079, 0x012d);
                cit_write_reg(gspca_dev, 0x00ff, 0x0130);
                cit_write_reg(gspca_dev, 0xcd41, 0x0124);
                cit_write_reg(gspca_dev, 0xfffa, 0x0124);
                cit_read_reg(gspca_dev, 0x0126, 1);
        }

        cit_model3_Packet1(gspca_dev, 0x000a, 0x0040);
        cit_model3_Packet1(gspca_dev, 0x000b, 0x00f6);
        cit_model3_Packet1(gspca_dev, 0x000c, 0x0002);
        cit_model3_Packet1(gspca_dev, 0x000d, 0x0020);
        cit_model3_Packet1(gspca_dev, 0x000e, 0x0033);
        cit_model3_Packet1(gspca_dev, 0x000f, 0x0007);
        cit_model3_Packet1(gspca_dev, 0x0010, 0x0000);
        cit_model3_Packet1(gspca_dev, 0x0011, 0x0070);
        cit_model3_Packet1(gspca_dev, 0x0012, 0x0030);
        cit_model3_Packet1(gspca_dev, 0x0013, 0x0000);
        cit_model3_Packet1(gspca_dev, 0x0014, 0x0001);
        cit_model3_Packet1(gspca_dev, 0x0015, 0x0001);
        cit_model3_Packet1(gspca_dev, 0x0016, 0x0001);
        cit_model3_Packet1(gspca_dev, 0x0017, 0x0001);
        cit_model3_Packet1(gspca_dev, 0x0018, 0x0000);
        cit_model3_Packet1(gspca_dev, 0x001e, 0x00c3);
        cit_model3_Packet1(gspca_dev, 0x0020, 0x0000);
        cit_model3_Packet1(gspca_dev, 0x0028, 0x0010);
        cit_model3_Packet1(gspca_dev, 0x0029, 0x0054);
        cit_model3_Packet1(gspca_dev, 0x002a, 0x0013);
        cit_model3_Packet1(gspca_dev, 0x002b, 0x0007);
        cit_model3_Packet1(gspca_dev, 0x002d, 0x0028);
        cit_model3_Packet1(gspca_dev, 0x002e, 0x0000);
        cit_model3_Packet1(gspca_dev, 0x0031, 0x0000);
        cit_model3_Packet1(gspca_dev, 0x0032, 0x0000);
        cit_model3_Packet1(gspca_dev, 0x0033, 0x0000);
        cit_model3_Packet1(gspca_dev, 0x0034, 0x0000);
        cit_model3_Packet1(gspca_dev, 0x0035, 0x0038);
        cit_model3_Packet1(gspca_dev, 0x003a, 0x0001);
        cit_model3_Packet1(gspca_dev, 0x003c, 0x001e);
        cit_model3_Packet1(gspca_dev, 0x003f, 0x000a);
        cit_model3_Packet1(gspca_dev, 0x0041, 0x0000);
        cit_model3_Packet1(gspca_dev, 0x0046, 0x003f);
        cit_model3_Packet1(gspca_dev, 0x0047, 0x0000);

        cit_model3_Packet1(gspca_dev, 0x0050, 0x0005);
        cit_model3_Packet1(gspca_dev, 0x0052, 0x001a);
        cit_model3_Packet1(gspca_dev, 0x0053, 0x0003);
        cit_model3_Packet1(gspca_dev, 0x005a, 0x006b);
        cit_model3_Packet1(gspca_dev, 0x005d, 0x001e);
        cit_model3_Packet1(gspca_dev, 0x005e, 0x0030);
        cit_model3_Packet1(gspca_dev, 0x005f, 0x0041);
        cit_model3_Packet1(gspca_dev, 0x0064, 0x0008);
        cit_model3_Packet1(gspca_dev, 0x0065, 0x0015);
        cit_model3_Packet1(gspca_dev, 0x0068, 0x000f);
        cit_model3_Packet1(gspca_dev, 0x0079, 0x0000);
        cit_model3_Packet1(gspca_dev, 0x007a, 0x0000);
        cit_model3_Packet1(gspca_dev, 0x007c, 0x003f);
        cit_model3_Packet1(gspca_dev, 0x0082, 0x000f);
        cit_model3_Packet1(gspca_dev, 0x0085, 0x0000);
        cit_model3_Packet1(gspca_dev, 0x0099, 0x0000);
        cit_model3_Packet1(gspca_dev, 0x009b, 0x0023);
        cit_model3_Packet1(gspca_dev, 0x009c, 0x0022);
        cit_model3_Packet1(gspca_dev, 0x009d, 0x0096);
        cit_model3_Packet1(gspca_dev, 0x009e, 0x0096);
        cit_model3_Packet1(gspca_dev, 0x009f, 0x000a);

        switch (gspca_dev->pixfmt.width) {
        case 160:
                cit_write_reg(gspca_dev, 0x0000, 0x0101); /* Same on 160x120, 320x240 */
                cit_write_reg(gspca_dev, 0x00a0, 0x0103); /* Same on 160x120, 320x240 */
                cit_write_reg(gspca_dev, 0x0078, 0x0105); /* Same on 160x120, 320x240 */
                cit_write_reg(gspca_dev, 0x0000, 0x010a); /* Same */
                cit_write_reg(gspca_dev, 0x0024, 0x010b); /* Differs everywhere */
                cit_write_reg(gspca_dev, 0x00a9, 0x0119);
                cit_write_reg(gspca_dev, 0x0016, 0x011b);
                cit_write_reg(gspca_dev, 0x0002, 0x011d); /* Same on 160x120, 320x240 */
                cit_write_reg(gspca_dev, 0x0003, 0x011e); /* Same on 160x120, 640x480 */
                cit_write_reg(gspca_dev, 0x0000, 0x0129); /* Same */
                cit_write_reg(gspca_dev, 0x00fc, 0x012b); /* Same */
                cit_write_reg(gspca_dev, 0x0018, 0x0102);
                cit_write_reg(gspca_dev, 0x0004, 0x0104);
                cit_write_reg(gspca_dev, 0x0004, 0x011a);
                cit_write_reg(gspca_dev, 0x0028, 0x011c);
                cit_write_reg(gspca_dev, 0x0022, 0x012a); /* Same */
                cit_write_reg(gspca_dev, 0x0000, 0x0118);
                cit_write_reg(gspca_dev, 0x0000, 0x0132);
                cit_model3_Packet1(gspca_dev, 0x0021, 0x0001); /* Same */
                cit_write_reg(gspca_dev, compression, 0x0109);
                clock_div = 3;
                break;
        case 320:
                cit_write_reg(gspca_dev, 0x0000, 0x0101); /* Same on 160x120, 320x240 */
                cit_write_reg(gspca_dev, 0x00a0, 0x0103); /* Same on 160x120, 320x240 */
                cit_write_reg(gspca_dev, 0x0078, 0x0105); /* Same on 160x120, 320x240 */
                cit_write_reg(gspca_dev, 0x0000, 0x010a); /* Same */
                cit_write_reg(gspca_dev, 0x0028, 0x010b); /* Differs everywhere */
                cit_write_reg(gspca_dev, 0x0002, 0x011d); /* Same */
                cit_write_reg(gspca_dev, 0x0000, 0x011e);
                cit_write_reg(gspca_dev, 0x0000, 0x0129); /* Same */
                cit_write_reg(gspca_dev, 0x00fc, 0x012b); /* Same */
                /* 4 commands from 160x120 skipped */
                cit_write_reg(gspca_dev, 0x0022, 0x012a); /* Same */
                cit_model3_Packet1(gspca_dev, 0x0021, 0x0001); /* Same */
                cit_write_reg(gspca_dev, compression, 0x0109);
                cit_write_reg(gspca_dev, 0x00d9, 0x0119);
                cit_write_reg(gspca_dev, 0x0006, 0x011b);
                cit_write_reg(gspca_dev, 0x0021, 0x0102); /* Same on 320x240, 640x480 */
                cit_write_reg(gspca_dev, 0x0010, 0x0104);
                cit_write_reg(gspca_dev, 0x0004, 0x011a);
                cit_write_reg(gspca_dev, 0x003f, 0x011c);
                cit_write_reg(gspca_dev, 0x001c, 0x0118);
                cit_write_reg(gspca_dev, 0x0000, 0x0132);
                clock_div = 5;
                break;
        case 640:
                cit_write_reg(gspca_dev, 0x00f0, 0x0105);
                cit_write_reg(gspca_dev, 0x0000, 0x010a); /* Same */
                cit_write_reg(gspca_dev, 0x0038, 0x010b); /* Differs everywhere */
                cit_write_reg(gspca_dev, 0x00d9, 0x0119); /* Same on 320x240, 640x480 */
                cit_write_reg(gspca_dev, 0x0006, 0x011b); /* Same on 320x240, 640x480 */
                cit_write_reg(gspca_dev, 0x0004, 0x011d); /* NC */
                cit_write_reg(gspca_dev, 0x0003, 0x011e); /* Same on 160x120, 640x480 */
                cit_write_reg(gspca_dev, 0x0000, 0x0129); /* Same */
                cit_write_reg(gspca_dev, 0x00fc, 0x012b); /* Same */
                cit_write_reg(gspca_dev, 0x0021, 0x0102); /* Same on 320x240, 640x480 */
                cit_write_reg(gspca_dev, 0x0016, 0x0104); /* NC */
                cit_write_reg(gspca_dev, 0x0004, 0x011a); /* Same on 320x240, 640x480 */
                cit_write_reg(gspca_dev, 0x003f, 0x011c); /* Same on 320x240, 640x480 */
                cit_write_reg(gspca_dev, 0x0022, 0x012a); /* Same */
                cit_write_reg(gspca_dev, 0x001c, 0x0118); /* Same on 320x240, 640x480 */
                cit_model3_Packet1(gspca_dev, 0x0021, 0x0001); /* Same */
                cit_write_reg(gspca_dev, compression, 0x0109);
                cit_write_reg(gspca_dev, 0x0040, 0x0101);
                cit_write_reg(gspca_dev, 0x0040, 0x0103);
                cit_write_reg(gspca_dev, 0x0000, 0x0132); /* Same on 320x240, 640x480 */
                clock_div = 7;
                break;
        }

        cit_model3_Packet1(gspca_dev, 0x007e, 0x000e);  /* Hue */
        cit_model3_Packet1(gspca_dev, 0x0036, 0x0011);  /* Brightness */
        cit_model3_Packet1(gspca_dev, 0x0060, 0x0002);  /* Sharpness */
        cit_model3_Packet1(gspca_dev, 0x0061, 0x0004);  /* Sharpness */
        cit_model3_Packet1(gspca_dev, 0x0062, 0x0005);  /* Sharpness */
        cit_model3_Packet1(gspca_dev, 0x0063, 0x0014);  /* Sharpness */
        cit_model3_Packet1(gspca_dev, 0x0096, 0x00a0);  /* Red sharpness */
        cit_model3_Packet1(gspca_dev, 0x0097, 0x0096);  /* Blue sharpness */
        cit_model3_Packet1(gspca_dev, 0x0067, 0x0001);  /* Contrast */
        cit_model3_Packet1(gspca_dev, 0x005b, 0x000c);  /* Contrast */
        cit_model3_Packet1(gspca_dev, 0x005c, 0x0016);  /* Contrast */
        cit_model3_Packet1(gspca_dev, 0x0098, 0x000b);
        cit_model3_Packet1(gspca_dev, 0x002c, 0x0003);  /* Was 1, broke 640x480 */
        cit_model3_Packet1(gspca_dev, 0x002f, 0x002a);
        cit_model3_Packet1(gspca_dev, 0x0030, 0x0029);
        cit_model3_Packet1(gspca_dev, 0x0037, 0x0002);
        cit_model3_Packet1(gspca_dev, 0x0038, 0x0059);
        cit_model3_Packet1(gspca_dev, 0x003d, 0x002e);
        cit_model3_Packet1(gspca_dev, 0x003e, 0x0028);
        cit_model3_Packet1(gspca_dev, 0x0078, 0x0005);
        cit_model3_Packet1(gspca_dev, 0x007b, 0x0011);
        cit_model3_Packet1(gspca_dev, 0x007d, 0x004b);
        cit_model3_Packet1(gspca_dev, 0x007f, 0x0022);
        cit_model3_Packet1(gspca_dev, 0x0080, 0x000c);
        cit_model3_Packet1(gspca_dev, 0x0081, 0x000b);
        cit_model3_Packet1(gspca_dev, 0x0083, 0x00fd);
        cit_model3_Packet1(gspca_dev, 0x0086, 0x000b);
        cit_model3_Packet1(gspca_dev, 0x0087, 0x000b);
        cit_model3_Packet1(gspca_dev, 0x007e, 0x000e);
        cit_model3_Packet1(gspca_dev, 0x0096, 0x00a0);  /* Red sharpness */
        cit_model3_Packet1(gspca_dev, 0x0097, 0x0096);  /* Blue sharpness */
        cit_model3_Packet1(gspca_dev, 0x0098, 0x000b);

        /* FIXME we should probably use cit_get_clock_div() here (in
           combination with isoc negotiation using the programmable isoc size)
           like with the IBM netcam pro). */
        cit_write_reg(gspca_dev, clock_div, 0x0111); /* Clock Divider */

        switch (gspca_dev->pixfmt.width) {
        case 160:
                cit_model3_Packet1(gspca_dev, 0x001f, 0x0000); /* Same */
                cit_model3_Packet1(gspca_dev, 0x0039, 0x001f); /* Same */
                cit_model3_Packet1(gspca_dev, 0x003b, 0x003c); /* Same */
                cit_model3_Packet1(gspca_dev, 0x0040, 0x000a);
                cit_model3_Packet1(gspca_dev, 0x0051, 0x000a);
                break;
        case 320:
                cit_model3_Packet1(gspca_dev, 0x001f, 0x0000); /* Same */
                cit_model3_Packet1(gspca_dev, 0x0039, 0x001f); /* Same */
                cit_model3_Packet1(gspca_dev, 0x003b, 0x003c); /* Same */
                cit_model3_Packet1(gspca_dev, 0x0040, 0x0008);
                cit_model3_Packet1(gspca_dev, 0x0051, 0x000b);
                break;
        case 640:
                cit_model3_Packet1(gspca_dev, 0x001f, 0x0002);  /* !Same */
                cit_model3_Packet1(gspca_dev, 0x0039, 0x003e);  /* !Same */
                cit_model3_Packet1(gspca_dev, 0x0040, 0x0008);
                cit_model3_Packet1(gspca_dev, 0x0051, 0x000a);
                break;
        }

/*      if (sd->input_index) { */
        if (rca_input) {
                for (i = 0; i < ARRAY_SIZE(rca_initdata); i++) {
                        if (rca_initdata[i][0])
                                cit_read_reg(gspca_dev, rca_initdata[i][2], 0);
                        else
                                cit_write_reg(gspca_dev, rca_initdata[i][1],
                                              rca_initdata[i][2]);
                }
        }

        return 0;
}

static int cit_start_model4(struct gspca_dev *gspca_dev)
{
        struct sd *sd = (struct sd *) gspca_dev;

        cit_write_reg(gspca_dev, 0x0000, 0x0100);
        cit_write_reg(gspca_dev, 0x00c0, 0x0111);
        cit_write_reg(gspca_dev, 0x00bc, 0x012c);
        cit_write_reg(gspca_dev, 0x0080, 0x012b);
        cit_write_reg(gspca_dev, 0x0000, 0x0108);
        cit_write_reg(gspca_dev, 0x0001, 0x0133);
        cit_write_reg(gspca_dev, 0x009b, 0x010f);
        cit_write_reg(gspca_dev, 0x00bb, 0x010f);
        cit_model4_Packet1(gspca_dev, 0x0038, 0x0000);
        cit_model4_Packet1(gspca_dev, 0x000a, 0x005c);

        cit_write_reg(gspca_dev, 0x00aa, 0x012d);
        cit_write_reg(gspca_dev, 0x0004, 0x012f);
        cit_write_reg(gspca_dev, 0xd141, 0x0124);
        cit_write_reg(gspca_dev, 0x0000, 0x0127);
        cit_write_reg(gspca_dev, 0x00fb, 0x012e);
        cit_write_reg(gspca_dev, 0x0000, 0x0130);
        cit_write_reg(gspca_dev, 0x8a28, 0x0124);
        cit_write_reg(gspca_dev, 0x00aa, 0x012f);
        cit_write_reg(gspca_dev, 0xd055, 0x0124);
        cit_write_reg(gspca_dev, 0x000c, 0x0127);
        cit_write_reg(gspca_dev, 0x0009, 0x012e);
        cit_write_reg(gspca_dev, 0xaa28, 0x0124);

        cit_write_reg(gspca_dev, 0x00aa, 0x012d);
        cit_write_reg(gspca_dev, 0x0012, 0x012f);
        cit_write_reg(gspca_dev, 0xd141, 0x0124);
        cit_write_reg(gspca_dev, 0x0008, 0x0127);
        cit_write_reg(gspca_dev, 0x00aa, 0x0130);
        cit_write_reg(gspca_dev, 0x82a8, 0x0124);
        cit_write_reg(gspca_dev, 0x002a, 0x012d);
        cit_write_reg(gspca_dev, 0x0000, 0x012f);
        cit_write_reg(gspca_dev, 0xd145, 0x0124);
        cit_write_reg(gspca_dev, 0xfffa, 0x0124);
        cit_model4_Packet1(gspca_dev, 0x0034, 0x0000);

        switch (gspca_dev->pixfmt.width) {
        case 128: /* 128x96 */
                cit_write_reg(gspca_dev, 0x0070, 0x0119);
                cit_write_reg(gspca_dev, 0x00d0, 0x0111);
                cit_write_reg(gspca_dev, 0x0039, 0x010a);
                cit_write_reg(gspca_dev, 0x0001, 0x0102);
                cit_write_reg(gspca_dev, 0x0028, 0x0103);
                cit_write_reg(gspca_dev, 0x0000, 0x0104);
                cit_write_reg(gspca_dev, 0x001e, 0x0105);
                cit_write_reg(gspca_dev, 0x00aa, 0x012d);
                cit_write_reg(gspca_dev, 0x0016, 0x012f);
                cit_write_reg(gspca_dev, 0xd141, 0x0124);
                cit_write_reg(gspca_dev, 0x000a, 0x0127);
                cit_write_reg(gspca_dev, 0x00aa, 0x0130);
                cit_write_reg(gspca_dev, 0x82a8, 0x0124);
                cit_write_reg(gspca_dev, 0x0014, 0x012d);
                cit_write_reg(gspca_dev, 0x0008, 0x012f);
                cit_write_reg(gspca_dev, 0xd145, 0x0124);
                cit_write_reg(gspca_dev, 0x00aa, 0x012e);
                cit_write_reg(gspca_dev, 0x001a, 0x0130);
                cit_write_reg(gspca_dev, 0x8a0a, 0x0124);
                cit_write_reg(gspca_dev, 0x005a, 0x012d);
                cit_write_reg(gspca_dev, 0x9545, 0x0124);
                cit_write_reg(gspca_dev, 0x00aa, 0x0127);
                cit_write_reg(gspca_dev, 0x0018, 0x012e);
                cit_write_reg(gspca_dev, 0x0043, 0x0130);
                cit_write_reg(gspca_dev, 0x8a28, 0x0124);
                cit_write_reg(gspca_dev, 0x00aa, 0x012f);
                cit_write_reg(gspca_dev, 0xd055, 0x0124);
                cit_write_reg(gspca_dev, 0x001c, 0x0127);
                cit_write_reg(gspca_dev, 0x00eb, 0x012e);
                cit_write_reg(gspca_dev, 0xaa28, 0x0124);
                cit_write_reg(gspca_dev, 0x00aa, 0x012d);
                cit_write_reg(gspca_dev, 0x0032, 0x012f);
                cit_write_reg(gspca_dev, 0xd141, 0x0124);
                cit_write_reg(gspca_dev, 0x0000, 0x0127);
                cit_write_reg(gspca_dev, 0x00aa, 0x0130);
                cit_write_reg(gspca_dev, 0x82a8, 0x0124);
                cit_write_reg(gspca_dev, 0x0036, 0x012d);
                cit_write_reg(gspca_dev, 0x0008, 0x012f);
                cit_write_reg(gspca_dev, 0xd145, 0x0124);
                cit_write_reg(gspca_dev, 0xfffa, 0x0124);
                cit_write_reg(gspca_dev, 0x00aa, 0x012d);
                cit_write_reg(gspca_dev, 0x001e, 0x012f);
                cit_write_reg(gspca_dev, 0xd141, 0x0124);
                cit_write_reg(gspca_dev, 0x0017, 0x0127);
                cit_write_reg(gspca_dev, 0x0013, 0x012e);
                cit_write_reg(gspca_dev, 0x0031, 0x0130);
                cit_write_reg(gspca_dev, 0x8a28, 0x0124);
                cit_write_reg(gspca_dev, 0x0017, 0x012d);
                cit_write_reg(gspca_dev, 0x0078, 0x012f);
                cit_write_reg(gspca_dev, 0xd145, 0x0124);
                cit_write_reg(gspca_dev, 0x0000, 0x0127);
                cit_write_reg(gspca_dev, 0xfea8, 0x0124);
                sd->sof_len = 2;
                break;
        case 160: /* 160x120 */
                cit_write_reg(gspca_dev, 0x0038, 0x0119);
                cit_write_reg(gspca_dev, 0x00d0, 0x0111);
                cit_write_reg(gspca_dev, 0x00b9, 0x010a);
                cit_write_reg(gspca_dev, 0x0001, 0x0102);
                cit_write_reg(gspca_dev, 0x0028, 0x0103);
                cit_write_reg(gspca_dev, 0x0000, 0x0104);
                cit_write_reg(gspca_dev, 0x001e, 0x0105);
                cit_write_reg(gspca_dev, 0x00aa, 0x012d);
                cit_write_reg(gspca_dev, 0x0016, 0x012f);
                cit_write_reg(gspca_dev, 0xd141, 0x0124);
                cit_write_reg(gspca_dev, 0x000b, 0x0127);
                cit_write_reg(gspca_dev, 0x00aa, 0x0130);
                cit_write_reg(gspca_dev, 0x82a8, 0x0124);
                cit_write_reg(gspca_dev, 0x0014, 0x012d);
                cit_write_reg(gspca_dev, 0x0008, 0x012f);
                cit_write_reg(gspca_dev, 0xd145, 0x0124);
                cit_write_reg(gspca_dev, 0x00aa, 0x012e);
                cit_write_reg(gspca_dev, 0x001a, 0x0130);
                cit_write_reg(gspca_dev, 0x8a0a, 0x0124);
                cit_write_reg(gspca_dev, 0x005a, 0x012d);
                cit_write_reg(gspca_dev, 0x9545, 0x0124);
                cit_write_reg(gspca_dev, 0x00aa, 0x0127);
                cit_write_reg(gspca_dev, 0x0018, 0x012e);
                cit_write_reg(gspca_dev, 0x0043, 0x0130);
                cit_write_reg(gspca_dev, 0x8a28, 0x0124);
                cit_write_reg(gspca_dev, 0x00aa, 0x012f);
                cit_write_reg(gspca_dev, 0xd055, 0x0124);
                cit_write_reg(gspca_dev, 0x001c, 0x0127);
                cit_write_reg(gspca_dev, 0x00c7, 0x012e);
                cit_write_reg(gspca_dev, 0xaa28, 0x0124);
                cit_write_reg(gspca_dev, 0x00aa, 0x012d);
                cit_write_reg(gspca_dev, 0x0032, 0x012f);
                cit_write_reg(gspca_dev, 0xd141, 0x0124);
                cit_write_reg(gspca_dev, 0x0025, 0x0127);
                cit_write_reg(gspca_dev, 0x00aa, 0x0130);
                cit_write_reg(gspca_dev, 0x82a8, 0x0124);
                cit_write_reg(gspca_dev, 0x0036, 0x012d);
                cit_write_reg(gspca_dev, 0x0008, 0x012f);
                cit_write_reg(gspca_dev, 0xd145, 0x0124);
                cit_write_reg(gspca_dev, 0xfffa, 0x0124);
                cit_write_reg(gspca_dev, 0x00aa, 0x012d);
                cit_write_reg(gspca_dev, 0x001e, 0x012f);
                cit_write_reg(gspca_dev, 0xd141, 0x0124);
                cit_write_reg(gspca_dev, 0x0048, 0x0127);
                cit_write_reg(gspca_dev, 0x0035, 0x012e);
                cit_write_reg(gspca_dev, 0x00d0, 0x0130);
                cit_write_reg(gspca_dev, 0x8a28, 0x0124);
                cit_write_reg(gspca_dev, 0x0048, 0x012d);
                cit_write_reg(gspca_dev, 0x0090, 0x012f);
                cit_write_reg(gspca_dev, 0xd145, 0x0124);
                cit_write_reg(gspca_dev, 0x0001, 0x0127);
                cit_write_reg(gspca_dev, 0xfea8, 0x0124);
                sd->sof_len = 2;
                break;
        case 176: /* 176x144 */
                cit_write_reg(gspca_dev, 0x0038, 0x0119);
                cit_write_reg(gspca_dev, 0x00d0, 0x0111);
                cit_write_reg(gspca_dev, 0x00b9, 0x010a);
                cit_write_reg(gspca_dev, 0x0001, 0x0102);
                cit_write_reg(gspca_dev, 0x002c, 0x0103);
                cit_write_reg(gspca_dev, 0x0000, 0x0104);
                cit_write_reg(gspca_dev, 0x0024, 0x0105);
                cit_write_reg(gspca_dev, 0x00aa, 0x012d);
                cit_write_reg(gspca_dev, 0x0016, 0x012f);
                cit_write_reg(gspca_dev, 0xd141, 0x0124);
                cit_write_reg(gspca_dev, 0x0007, 0x0127);
                cit_write_reg(gspca_dev, 0x00aa, 0x0130);
                cit_write_reg(gspca_dev, 0x82a8, 0x0124);
                cit_write_reg(gspca_dev, 0x0014, 0x012d);
                cit_write_reg(gspca_dev, 0x0001, 0x012f);
                cit_write_reg(gspca_dev, 0xd145, 0x0124);
                cit_write_reg(gspca_dev, 0x00aa, 0x012e);
                cit_write_reg(gspca_dev, 0x001a, 0x0130);
                cit_write_reg(gspca_dev, 0x8a0a, 0x0124);
                cit_write_reg(gspca_dev, 0x005e, 0x012d);
                cit_write_reg(gspca_dev, 0x9545, 0x0124);
                cit_write_reg(gspca_dev, 0x00aa, 0x0127);
                cit_write_reg(gspca_dev, 0x0018, 0x012e);
                cit_write_reg(gspca_dev, 0x0049, 0x0130);
                cit_write_reg(gspca_dev, 0x8a28, 0x0124);
                cit_write_reg(gspca_dev, 0x00aa, 0x012f);
                cit_write_reg(gspca_dev, 0xd055, 0x0124);
                cit_write_reg(gspca_dev, 0x001c, 0x0127);
                cit_write_reg(gspca_dev, 0x00c7, 0x012e);
                cit_write_reg(gspca_dev, 0xaa28, 0x0124);
                cit_write_reg(gspca_dev, 0x00aa, 0x012d);
                cit_write_reg(gspca_dev, 0x0032, 0x012f);
                cit_write_reg(gspca_dev, 0xd141, 0x0124);
                cit_write_reg(gspca_dev, 0x0028, 0x0127);
                cit_write_reg(gspca_dev, 0x00aa, 0x0130);
                cit_write_reg(gspca_dev, 0x82a8, 0x0124);
                cit_write_reg(gspca_dev, 0x0036, 0x012d);
                cit_write_reg(gspca_dev, 0x0008, 0x012f);
                cit_write_reg(gspca_dev, 0xd145, 0x0124);
                cit_write_reg(gspca_dev, 0xfffa, 0x0124);
                cit_write_reg(gspca_dev, 0x00aa, 0x012d);
                cit_write_reg(gspca_dev, 0x001e, 0x012f);
                cit_write_reg(gspca_dev, 0xd141, 0x0124);
                cit_write_reg(gspca_dev, 0x0010, 0x0127);
                cit_write_reg(gspca_dev, 0x0013, 0x012e);
                cit_write_reg(gspca_dev, 0x002a, 0x0130);
                cit_write_reg(gspca_dev, 0x8a28, 0x0124);
                cit_write_reg(gspca_dev, 0x0010, 0x012d);
                cit_write_reg(gspca_dev, 0x006d, 0x012f);
                cit_write_reg(gspca_dev, 0xd145, 0x0124);
                cit_write_reg(gspca_dev, 0x0001, 0x0127);
                cit_write_reg(gspca_dev, 0xfea8, 0x0124);
                /* TESTME HDG: this does not seem right
                   (it is 2 for all other resolutions) */
                sd->sof_len = 10;
                break;
        case 320: /* 320x240 */
                cit_write_reg(gspca_dev, 0x0070, 0x0119);
                cit_write_reg(gspca_dev, 0x00d0, 0x0111);
                cit_write_reg(gspca_dev, 0x0039, 0x010a);
                cit_write_reg(gspca_dev, 0x0001, 0x0102);
                cit_write_reg(gspca_dev, 0x0028, 0x0103);
                cit_write_reg(gspca_dev, 0x0000, 0x0104);
                cit_write_reg(gspca_dev, 0x001e, 0x0105);
                cit_write_reg(gspca_dev, 0x00aa, 0x012d);
                cit_write_reg(gspca_dev, 0x0016, 0x012f);
                cit_write_reg(gspca_dev, 0xd141, 0x0124);
                cit_write_reg(gspca_dev, 0x000a, 0x0127);
                cit_write_reg(gspca_dev, 0x00aa, 0x0130);
                cit_write_reg(gspca_dev, 0x82a8, 0x0124);
                cit_write_reg(gspca_dev, 0x0014, 0x012d);
                cit_write_reg(gspca_dev, 0x0008, 0x012f);
                cit_write_reg(gspca_dev, 0xd145, 0x0124);
                cit_write_reg(gspca_dev, 0x00aa, 0x012e);
                cit_write_reg(gspca_dev, 0x001a, 0x0130);
                cit_write_reg(gspca_dev, 0x8a0a, 0x0124);
                cit_write_reg(gspca_dev, 0x005a, 0x012d);
                cit_write_reg(gspca_dev, 0x9545, 0x0124);
                cit_write_reg(gspca_dev, 0x00aa, 0x0127);
                cit_write_reg(gspca_dev, 0x0018, 0x012e);
                cit_write_reg(gspca_dev, 0x0043, 0x0130);
                cit_write_reg(gspca_dev, 0x8a28, 0x0124);
                cit_write_reg(gspca_dev, 0x00aa, 0x012f);
                cit_write_reg(gspca_dev, 0xd055, 0x0124);
                cit_write_reg(gspca_dev, 0x001c, 0x0127);
                cit_write_reg(gspca_dev, 0x00eb, 0x012e);
                cit_write_reg(gspca_dev, 0xaa28, 0x0124);
                cit_write_reg(gspca_dev, 0x00aa, 0x012d);
                cit_write_reg(gspca_dev, 0x0032, 0x012f);
                cit_write_reg(gspca_dev, 0xd141, 0x0124);
                cit_write_reg(gspca_dev, 0x0000, 0x0127);
                cit_write_reg(gspca_dev, 0x00aa, 0x0130);
                cit_write_reg(gspca_dev, 0x82a8, 0x0124);
                cit_write_reg(gspca_dev, 0x0036, 0x012d);
                cit_write_reg(gspca_dev, 0x0008, 0x012f);
                cit_write_reg(gspca_dev, 0xd145, 0x0124);
                cit_write_reg(gspca_dev, 0xfffa, 0x0124);
                cit_write_reg(gspca_dev, 0x00aa, 0x012d);
                cit_write_reg(gspca_dev, 0x001e, 0x012f);
                cit_write_reg(gspca_dev, 0xd141, 0x0124);
                cit_write_reg(gspca_dev, 0x0017, 0x0127);
                cit_write_reg(gspca_dev, 0x0013, 0x012e);
                cit_write_reg(gspca_dev, 0x0031, 0x0130);
                cit_write_reg(gspca_dev, 0x8a28, 0x0124);
                cit_write_reg(gspca_dev, 0x0017, 0x012d);
                cit_write_reg(gspca_dev, 0x0078, 0x012f);
                cit_write_reg(gspca_dev, 0xd145, 0x0124);
                cit_write_reg(gspca_dev, 0x0000, 0x0127);
                cit_write_reg(gspca_dev, 0xfea8, 0x0124);
                sd->sof_len = 2;
                break;
        case 352: /* 352x288 */
                cit_write_reg(gspca_dev, 0x0070, 0x0119);
                cit_write_reg(gspca_dev, 0x00c0, 0x0111);
                cit_write_reg(gspca_dev, 0x0039, 0x010a);
                cit_write_reg(gspca_dev, 0x0001, 0x0102);
                cit_write_reg(gspca_dev, 0x002c, 0x0103);
                cit_write_reg(gspca_dev, 0x0000, 0x0104);
                cit_write_reg(gspca_dev, 0x0024, 0x0105);
                cit_write_reg(gspca_dev, 0x00aa, 0x012d);
                cit_write_reg(gspca_dev, 0x0016, 0x012f);
                cit_write_reg(gspca_dev, 0xd141, 0x0124);
                cit_write_reg(gspca_dev, 0x0006, 0x0127);
                cit_write_reg(gspca_dev, 0x00aa, 0x0130);
                cit_write_reg(gspca_dev, 0x82a8, 0x0124);
                cit_write_reg(gspca_dev, 0x0014, 0x012d);
                cit_write_reg(gspca_dev, 0x0002, 0x012f);
                cit_write_reg(gspca_dev, 0xd145, 0x0124);
                cit_write_reg(gspca_dev, 0x00aa, 0x012e);
                cit_write_reg(gspca_dev, 0x001a, 0x0130);
                cit_write_reg(gspca_dev, 0x8a0a, 0x0124);
                cit_write_reg(gspca_dev, 0x005e, 0x012d);
                cit_write_reg(gspca_dev, 0x9545, 0x0124);
                cit_write_reg(gspca_dev, 0x00aa, 0x0127);
                cit_write_reg(gspca_dev, 0x0018, 0x012e);
                cit_write_reg(gspca_dev, 0x0049, 0x0130);
                cit_write_reg(gspca_dev, 0x8a28, 0x0124);
                cit_write_reg(gspca_dev, 0x00aa, 0x012f);
                cit_write_reg(gspca_dev, 0xd055, 0x0124);
                cit_write_reg(gspca_dev, 0x001c, 0x0127);
                cit_write_reg(gspca_dev, 0x00cf, 0x012e);
                cit_write_reg(gspca_dev, 0xaa28, 0x0124);
                cit_write_reg(gspca_dev, 0x00aa, 0x012d);
                cit_write_reg(gspca_dev, 0x0032, 0x012f);
                cit_write_reg(gspca_dev, 0xd141, 0x0124);
                cit_write_reg(gspca_dev, 0x0000, 0x0127);
                cit_write_reg(gspca_dev, 0x00aa, 0x0130);
                cit_write_reg(gspca_dev, 0x82a8, 0x0124);
                cit_write_reg(gspca_dev, 0x0036, 0x012d);
                cit_write_reg(gspca_dev, 0x0008, 0x012f);
                cit_write_reg(gspca_dev, 0xd145, 0x0124);
                cit_write_reg(gspca_dev, 0xfffa, 0x0124);
                cit_write_reg(gspca_dev, 0x00aa, 0x012d);
                cit_write_reg(gspca_dev, 0x001e, 0x012f);
                cit_write_reg(gspca_dev, 0xd141, 0x0124);
                cit_write_reg(gspca_dev, 0x0010, 0x0127);
                cit_write_reg(gspca_dev, 0x0013, 0x012e);
                cit_write_reg(gspca_dev, 0x0025, 0x0130);
                cit_write_reg(gspca_dev, 0x8a28, 0x0124);
                cit_write_reg(gspca_dev, 0x0010, 0x012d);
                cit_write_reg(gspca_dev, 0x0048, 0x012f);
                cit_write_reg(gspca_dev, 0xd145, 0x0124);
                cit_write_reg(gspca_dev, 0x0000, 0x0127);
                cit_write_reg(gspca_dev, 0xfea8, 0x0124);
                sd->sof_len = 2;
                break;
        }

        cit_model4_Packet1(gspca_dev, 0x0038, 0x0004);

        return 0;
}

static int cit_start_ibm_netcam_pro(struct gspca_dev *gspca_dev)
{
        const unsigned short compression = 0; /* 0=none, 7=best frame rate */
        int i, clock_div;

        clock_div = cit_get_clock_div(gspca_dev);
        if (clock_div < 0)
                return clock_div;

        cit_write_reg(gspca_dev, 0x0003, 0x0133);
        cit_write_reg(gspca_dev, 0x0000, 0x0117);
        cit_write_reg(gspca_dev, 0x0008, 0x0123);
        cit_write_reg(gspca_dev, 0x0000, 0x0100);
        cit_write_reg(gspca_dev, 0x0060, 0x0116);
        /* cit_write_reg(gspca_dev, 0x0002, 0x0112); see sd_stop0 */
        cit_write_reg(gspca_dev, 0x0000, 0x0133);
        cit_write_reg(gspca_dev, 0x0000, 0x0123);
        cit_write_reg(gspca_dev, 0x0001, 0x0117);
        cit_write_reg(gspca_dev, 0x0040, 0x0108);
        cit_write_reg(gspca_dev, 0x0019, 0x012c);
        cit_write_reg(gspca_dev, 0x0060, 0x0116);
        /* cit_write_reg(gspca_dev, 0x000b, 0x0115); see sd_stop0 */

        cit_model3_Packet1(gspca_dev, 0x0049, 0x0000);

        cit_write_reg(gspca_dev, 0x0000, 0x0101); /* Same on 160x120, 320x240 */
        cit_write_reg(gspca_dev, 0x003a, 0x0102); /* Hstart */
        cit_write_reg(gspca_dev, 0x00a0, 0x0103); /* Same on 160x120, 320x240 */
        cit_write_reg(gspca_dev, 0x0078, 0x0105); /* Same on 160x120, 320x240 */
        cit_write_reg(gspca_dev, 0x0000, 0x010a); /* Same */
        cit_write_reg(gspca_dev, 0x0002, 0x011d); /* Same on 160x120, 320x240 */
        cit_write_reg(gspca_dev, 0x0000, 0x0129); /* Same */
        cit_write_reg(gspca_dev, 0x00fc, 0x012b); /* Same */
        cit_write_reg(gspca_dev, 0x0022, 0x012a); /* Same */

        switch (gspca_dev->pixfmt.width) {
        case 160: /* 160x120 */
                cit_write_reg(gspca_dev, 0x0024, 0x010b);
                cit_write_reg(gspca_dev, 0x0089, 0x0119);
                cit_write_reg(gspca_dev, 0x000a, 0x011b);
                cit_write_reg(gspca_dev, 0x0003, 0x011e);
                cit_write_reg(gspca_dev, 0x0007, 0x0104);
                cit_write_reg(gspca_dev, 0x0009, 0x011a);
                cit_write_reg(gspca_dev, 0x008b, 0x011c);
                cit_write_reg(gspca_dev, 0x0008, 0x0118);
                cit_write_reg(gspca_dev, 0x0000, 0x0132);
                break;
        case 320: /* 320x240 */
                cit_write_reg(gspca_dev, 0x0028, 0x010b);
                cit_write_reg(gspca_dev, 0x00d9, 0x0119);
                cit_write_reg(gspca_dev, 0x0006, 0x011b);
                cit_write_reg(gspca_dev, 0x0000, 0x011e);
                cit_write_reg(gspca_dev, 0x000e, 0x0104);
                cit_write_reg(gspca_dev, 0x0004, 0x011a);
                cit_write_reg(gspca_dev, 0x003f, 0x011c);
                cit_write_reg(gspca_dev, 0x000c, 0x0118);
                cit_write_reg(gspca_dev, 0x0000, 0x0132);
                break;
        }

        cit_model3_Packet1(gspca_dev, 0x0019, 0x0031);
        cit_model3_Packet1(gspca_dev, 0x001a, 0x0003);
        cit_model3_Packet1(gspca_dev, 0x001b, 0x0038);
        cit_model3_Packet1(gspca_dev, 0x001c, 0x0000);
        cit_model3_Packet1(gspca_dev, 0x0024, 0x0001);
        cit_model3_Packet1(gspca_dev, 0x0027, 0x0001);
        cit_model3_Packet1(gspca_dev, 0x002a, 0x0004);
        cit_model3_Packet1(gspca_dev, 0x0035, 0x000b);
        cit_model3_Packet1(gspca_dev, 0x003f, 0x0001);
        cit_model3_Packet1(gspca_dev, 0x0044, 0x0000);
        cit_model3_Packet1(gspca_dev, 0x0054, 0x0000);
        cit_model3_Packet1(gspca_dev, 0x00c4, 0x0000);
        cit_model3_Packet1(gspca_dev, 0x00e7, 0x0001);
        cit_model3_Packet1(gspca_dev, 0x00e9, 0x0001);
        cit_model3_Packet1(gspca_dev, 0x00ee, 0x0000);
        cit_model3_Packet1(gspca_dev, 0x00f3, 0x00c0);

        cit_write_reg(gspca_dev, compression, 0x0109);
        cit_write_reg(gspca_dev, clock_div, 0x0111);

/*      if (sd->input_index) { */
        if (rca_input) {
                for (i = 0; i < ARRAY_SIZE(rca_initdata); i++) {
                        if (rca_initdata[i][0])
                                cit_read_reg(gspca_dev, rca_initdata[i][2], 0);
                        else
                                cit_write_reg(gspca_dev, rca_initdata[i][1],
                                              rca_initdata[i][2]);
                }
        }

        return 0;
}

/* -- start the camera -- */
static int sd_start(struct gspca_dev *gspca_dev)
{
        struct sd *sd = (struct sd *) gspca_dev;
        int packet_size;

        packet_size = cit_get_packet_size(gspca_dev);
        if (packet_size < 0)
                return packet_size;

        switch (sd->model) {
        case CIT_MODEL0:
                cit_start_model0(gspca_dev);
                break;
        case CIT_MODEL1:
                cit_start_model1(gspca_dev);
                break;
        case CIT_MODEL2:
                cit_start_model2(gspca_dev);
                break;
        case CIT_MODEL3:
                cit_start_model3(gspca_dev);
                break;
        case CIT_MODEL4:
                cit_start_model4(gspca_dev);
                break;
        case CIT_IBM_NETCAM_PRO:
                cit_start_ibm_netcam_pro(gspca_dev);
                break;
        }

        /* Program max isoc packet size */
        cit_write_reg(gspca_dev, packet_size >> 8, 0x0106);
        cit_write_reg(gspca_dev, packet_size & 0xff, 0x0107);

        cit_restart_stream(gspca_dev);

        return 0;
}

static int sd_isoc_init(struct gspca_dev *gspca_dev)
{
        struct usb_interface_cache *intfc;
        struct usb_host_interface *alt;
        int max_packet_size;

        switch (gspca_dev->pixfmt.width) {
        case 160:
                max_packet_size = 450;
                break;
        case 176:
                max_packet_size = 600;
                break;
        default:
                max_packet_size = 1022;
                break;
        }

        intfc = gspca_dev->dev->actconfig->intf_cache[0];

        if (intfc->num_altsetting < 2)
                return -ENODEV;

        alt = &intfc->altsetting[1];

        if (alt->desc.bNumEndpoints < 1)
                return -ENODEV;

        /* Start isoc bandwidth "negotiation" at max isoc bandwidth */
        alt->endpoint[0].desc.wMaxPacketSize = cpu_to_le16(max_packet_size);

        return 0;
}

static int sd_isoc_nego(struct gspca_dev *gspca_dev)
{
        int ret, packet_size, min_packet_size;
        struct usb_host_interface *alt;

        switch (gspca_dev->pixfmt.width) {
        case 160:
                min_packet_size = 200;
                break;
        case 176:
                min_packet_size = 266;
                break;
        default:
                min_packet_size = 400;
                break;
        }

        /*
         * Existence of altsetting and endpoint was verified in sd_isoc_init()
         */
        alt = &gspca_dev->dev->actconfig->intf_cache[0]->altsetting[1];
        packet_size = le16_to_cpu(alt->endpoint[0].desc.wMaxPacketSize);
        if (packet_size <= min_packet_size)
                return -EIO;

        packet_size -= 100;
        if (packet_size < min_packet_size)
                packet_size = min_packet_size;
        alt->endpoint[0].desc.wMaxPacketSize = cpu_to_le16(packet_size);

        ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, 1);
        if (ret < 0)
                pr_err("set alt 1 err %d\n", ret);

        return ret;
}

static void sd_stopN(struct gspca_dev *gspca_dev)
{
        cit_write_reg(gspca_dev, 0x0000, 0x010c);
}

static void sd_stop0(struct gspca_dev *gspca_dev)
{
        struct sd *sd = (struct sd *) gspca_dev;

        if (!gspca_dev->present)
                return;

        switch (sd->model) {
        case CIT_MODEL0:
                /* HDG windows does this, but it causes the cams autogain to
                   restart from a gain of 0, which does not look good when
                   changing resolutions. */
                /* cit_write_reg(gspca_dev, 0x0000, 0x0112); */
                cit_write_reg(gspca_dev, 0x00c0, 0x0100); /* LED Off */
                break;
        case CIT_MODEL1:
                cit_send_FF_04_02(gspca_dev);
                cit_read_reg(gspca_dev, 0x0100, 0);
                cit_write_reg(gspca_dev, 0x81, 0x0100); /* LED Off */
                break;
        case CIT_MODEL2:
                v4l2_ctrl_grab(sd->lighting, false);
                /* Fall through! */
        case CIT_MODEL4:
                cit_model2_Packet1(gspca_dev, 0x0030, 0x0004);

                cit_write_reg(gspca_dev, 0x0080, 0x0100);       /* LED Off */
                cit_write_reg(gspca_dev, 0x0020, 0x0111);
                cit_write_reg(gspca_dev, 0x00a0, 0x0111);

                cit_model2_Packet1(gspca_dev, 0x0030, 0x0002);

                cit_write_reg(gspca_dev, 0x0020, 0x0111);
                cit_write_reg(gspca_dev, 0x0000, 0x0112);
                break;
        case CIT_MODEL3:
                cit_write_reg(gspca_dev, 0x0006, 0x012c);
                cit_model3_Packet1(gspca_dev, 0x0046, 0x0000);
                cit_read_reg(gspca_dev, 0x0116, 0);
                cit_write_reg(gspca_dev, 0x0064, 0x0116);
                cit_read_reg(gspca_dev, 0x0115, 0);
                cit_write_reg(gspca_dev, 0x0003, 0x0115);
                cit_write_reg(gspca_dev, 0x0008, 0x0123);
                cit_write_reg(gspca_dev, 0x0000, 0x0117);
                cit_write_reg(gspca_dev, 0x0000, 0x0112);
                cit_write_reg(gspca_dev, 0x0080, 0x0100);
                break;
        case CIT_IBM_NETCAM_PRO:
                cit_model3_Packet1(gspca_dev, 0x0049, 0x00ff);
                cit_write_reg(gspca_dev, 0x0006, 0x012c);
                cit_write_reg(gspca_dev, 0x0000, 0x0116);
                /* HDG windows does this, but I cannot get the camera
                   to restart with this without redoing the entire init
                   sequence which makes switching modes really slow */
                /* cit_write_reg(gspca_dev, 0x0006, 0x0115); */
                cit_write_reg(gspca_dev, 0x0008, 0x0123);
                cit_write_reg(gspca_dev, 0x0000, 0x0117);
                cit_write_reg(gspca_dev, 0x0003, 0x0133);
                cit_write_reg(gspca_dev, 0x0000, 0x0111);
                /* HDG windows does this, but I get a green picture when
                   restarting the stream after this */
                /* cit_write_reg(gspca_dev, 0x0000, 0x0112); */
                cit_write_reg(gspca_dev, 0x00c0, 0x0100);
                break;
        }

#if IS_ENABLED(CONFIG_INPUT)
        /* If the last button state is pressed, release it now! */
        if (sd->button_state) {
                input_report_key(gspca_dev->input_dev, KEY_CAMERA, 0);
                input_sync(gspca_dev->input_dev);
                sd->button_state = 0;
        }
#endif
}

static u8 *cit_find_sof(struct gspca_dev *gspca_dev, u8 *data, int len)
{
        struct sd *sd = (struct sd *) gspca_dev;
        u8 byte3 = 0, byte4 = 0;
        int i;

        switch (sd->model) {
        case CIT_MODEL0:
        case CIT_MODEL1:
        case CIT_MODEL3:
        case CIT_IBM_NETCAM_PRO:
                switch (gspca_dev->pixfmt.width) {
                case 160: /* 160x120 */
                        byte3 = 0x02;
                        byte4 = 0x0a;
                        break;
                case 176: /* 176x144 */
                        byte3 = 0x02;
                        byte4 = 0x0e;
                        break;
                case 320: /* 320x240 */
                        byte3 = 0x02;
                        byte4 = 0x08;
                        break;
                case 352: /* 352x288 */
                        byte3 = 0x02;
                        byte4 = 0x00;
                        break;
                case 640:
                        byte3 = 0x03;
                        byte4 = 0x08;
                        break;
                }

                /* These have a different byte3 */
                if (sd->model <= CIT_MODEL1)
                        byte3 = 0x00;

                for (i = 0; i < len; i++) {
                        /* For this model the SOF always starts at offset 0
                           so no need to search the entire frame */
                        if (sd->model == CIT_MODEL0 && sd->sof_read != i)
                                break;

                        switch (sd->sof_read) {
                        case 0:
                                if (data[i] == 0x00)
                                        sd->sof_read++;
                                break;
                        case 1:
                                if (data[i] == 0xff)
                                        sd->sof_read++;
                                else if (data[i] == 0x00)
                                        sd->sof_read = 1;
                                else
                                        sd->sof_read = 0;
                                break;
                        case 2:
                                if (data[i] == byte3)
                                        sd->sof_read++;
                                else if (data[i] == 0x00)
                                        sd->sof_read = 1;
                                else
                                        sd->sof_read = 0;
                                break;
                        case 3:
                                if (data[i] == byte4) {
                                        sd->sof_read = 0;
                                        return data + i + (sd->sof_len - 3);
                                }
                                if (byte3 == 0x00 && data[i] == 0xff)
                                        sd->sof_read = 2;
                                else if (data[i] == 0x00)
                                        sd->sof_read = 1;
                                else
                                        sd->sof_read = 0;
                                break;
                        }
                }
                break;
        case CIT_MODEL2:
        case CIT_MODEL4:
                /* TESTME we need to find a longer sof signature to avoid
                   false positives */
                for (i = 0; i < len; i++) {
                        switch (sd->sof_read) {
                        case 0:
                                if (data[i] == 0x00)
                                        sd->sof_read++;
                                break;
                        case 1:
                                sd->sof_read = 0;
                                if (data[i] == 0xff) {
                                        if (i >= 4)
                                                gspca_dbg(gspca_dev, D_FRAM,
                                                          "header found at offset: %d: %02x %02x 00 %3ph\n\n",
                                                          i - 1,
                                                          data[i - 4],
                                                          data[i - 3],
                                                          &data[i]);
                                        else
                                                gspca_dbg(gspca_dev, D_FRAM,
                                                          "header found at offset: %d: 00 %3ph\n\n",
                                                          i - 1,
                                                          &data[i]);
                                        return data + i + (sd->sof_len - 1);
                                }
                                break;
                        }
                }
                break;
        }
        return NULL;
}

static void sd_pkt_scan(struct gspca_dev *gspca_dev,
                        u8 *data, int len)
{
        struct sd *sd = (struct sd *) gspca_dev;
        unsigned char *sof;

        sof = cit_find_sof(gspca_dev, data, len);
        if (sof) {
                int n;

                /* finish decoding current frame */
                n = sof - data;
                if (n > sd->sof_len)
                        n -= sd->sof_len;
                else
                        n = 0;
                gspca_frame_add(gspca_dev, LAST_PACKET,
                                data, n);
                gspca_frame_add(gspca_dev, FIRST_PACKET, NULL, 0);
                len -= sof - data;
                data = sof;
        }

        gspca_frame_add(gspca_dev, INTER_PACKET, data, len);
}

#if IS_ENABLED(CONFIG_INPUT)
static void cit_check_button(struct gspca_dev *gspca_dev)
{
        int new_button_state;
        struct sd *sd = (struct sd *)gspca_dev;

        switch (sd->model) {
        case CIT_MODEL3:
        case CIT_IBM_NETCAM_PRO:
                break;
        default: /* TEST ME unknown if this works on other models too */
                return;
        }

        /* Read the button state */
        cit_read_reg(gspca_dev, 0x0113, 0);
        new_button_state = !gspca_dev->usb_buf[0];

        /* Tell the cam we've seen the button press, notice that this
           is a nop (iow the cam keeps reporting pressed) until the
           button is actually released. */
        if (new_button_state)
                cit_write_reg(gspca_dev, 0x01, 0x0113);

        if (sd->button_state != new_button_state) {
                input_report_key(gspca_dev->input_dev, KEY_CAMERA,
                                 new_button_state);
                input_sync(gspca_dev->input_dev);
                sd->button_state = new_button_state;
        }
}
#endif

static int sd_s_ctrl(struct v4l2_ctrl *ctrl)
{
        struct gspca_dev *gspca_dev =
                container_of(ctrl->handler, struct gspca_dev, ctrl_handler);
        struct sd *sd = (struct sd *)gspca_dev;

        gspca_dev->usb_err = 0;

        if (!gspca_dev->streaming)
                return 0;

        if (sd->stop_on_control_change)
                sd_stopN(gspca_dev);
        switch (ctrl->id) {
        case V4L2_CID_BRIGHTNESS:
                cit_set_brightness(gspca_dev, ctrl->val);
                break;
        case V4L2_CID_CONTRAST:
                cit_set_contrast(gspca_dev, ctrl->val);
                break;
        case V4L2_CID_HUE:
                cit_set_hue(gspca_dev, ctrl->val);
                break;
        case V4L2_CID_HFLIP:
                cit_set_hflip(gspca_dev, ctrl->val);
                break;
        case V4L2_CID_SHARPNESS:
                cit_set_sharpness(gspca_dev, ctrl->val);
                break;
        case V4L2_CID_BACKLIGHT_COMPENSATION:
                cit_set_lighting(gspca_dev, ctrl->val);
                break;
        }
        if (sd->stop_on_control_change)
                cit_restart_stream(gspca_dev);
        return gspca_dev->usb_err;
}

static const struct v4l2_ctrl_ops sd_ctrl_ops = {
        .s_ctrl = sd_s_ctrl,
};

static int sd_init_controls(struct gspca_dev *gspca_dev)
{
        struct sd *sd = (struct sd *)gspca_dev;

        struct v4l2_ctrl_handler *hdl = &gspca_dev->ctrl_handler;
        bool has_brightness;
        bool has_contrast;
        bool has_hue;
        bool has_sharpness;
        bool has_lighting;
        bool has_hflip;

        has_brightness = has_contrast = has_hue =
                has_sharpness = has_hflip = has_lighting = false;
        switch (sd->model) {
        case CIT_MODEL0:
                has_contrast = has_hflip = true;
                break;
        case CIT_MODEL1:
                has_brightness = has_contrast =
                        has_sharpness = has_lighting = true;
                break;
        case CIT_MODEL2:
                has_brightness = has_hue = has_lighting = true;
                break;
        case CIT_MODEL3:
                has_brightness = has_contrast = has_sharpness = true;
                break;
        case CIT_MODEL4:
                has_brightness = has_hue = true;
                break;
        case CIT_IBM_NETCAM_PRO:
                has_brightness = has_hue =
                        has_sharpness = has_hflip = has_lighting = true;
                break;
        }
        gspca_dev->vdev.ctrl_handler = hdl;
        v4l2_ctrl_handler_init(hdl, 5);
        if (has_brightness)
                v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
                        V4L2_CID_BRIGHTNESS, 0, 63, 1, 32);
        if (has_contrast)
                v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
                        V4L2_CID_CONTRAST, 0, 20, 1, 10);
        if (has_hue)
                v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
                        V4L2_CID_HUE, 0, 127, 1, 63);
        if (has_sharpness)
                v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
                        V4L2_CID_SHARPNESS, 0, 6, 1, 3);
        if (has_lighting)
                sd->lighting = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
                        V4L2_CID_BACKLIGHT_COMPENSATION, 0, 2, 1, 1);
        if (has_hflip)
                v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
                        V4L2_CID_HFLIP, 0, 1, 1, 0);

        if (hdl->error) {
                pr_err("Could not initialize controls\n");
                return hdl->error;
        }
        return 0;
}

/* sub-driver description */
static const struct sd_desc sd_desc = {
        .name = MODULE_NAME,
        .config = sd_config,
        .init = sd_init,
        .init_controls = sd_init_controls,
        .start = sd_start,
        .stopN = sd_stopN,
        .stop0 = sd_stop0,
        .pkt_scan = sd_pkt_scan,
#if IS_ENABLED(CONFIG_INPUT)
        .dq_callback = cit_check_button,
        .other_input = 1,
#endif
};

static const struct sd_desc sd_desc_isoc_nego = {
        .name = MODULE_NAME,
        .config = sd_config,
        .init = sd_init,
        .init_controls = sd_init_controls,
        .start = sd_start,
        .isoc_init = sd_isoc_init,
        .isoc_nego = sd_isoc_nego,
        .stopN = sd_stopN,
        .stop0 = sd_stop0,
        .pkt_scan = sd_pkt_scan,
#if IS_ENABLED(CONFIG_INPUT)
        .dq_callback = cit_check_button,
        .other_input = 1,
#endif
};

/* -- module initialisation -- */
static const struct usb_device_id device_table[] = {
        { USB_DEVICE_VER(0x0545, 0x8080, 0x0001, 0x0001), .driver_info = CIT_MODEL0 },
        { USB_DEVICE_VER(0x0545, 0x8080, 0x0002, 0x0002), .driver_info = CIT_MODEL1 },
        { USB_DEVICE_VER(0x0545, 0x8080, 0x030a, 0x030a), .driver_info = CIT_MODEL2 },
        { USB_DEVICE_VER(0x0545, 0x8080, 0x0301, 0x0301), .driver_info = CIT_MODEL3 },
        { USB_DEVICE_VER(0x0545, 0x8002, 0x030a, 0x030a), .driver_info = CIT_MODEL4 },
        { USB_DEVICE_VER(0x0545, 0x800c, 0x030a, 0x030a), .driver_info = CIT_MODEL2 },
        { USB_DEVICE_VER(0x0545, 0x800d, 0x030a, 0x030a), .driver_info = CIT_MODEL4 },
        {}
};
MODULE_DEVICE_TABLE(usb, device_table);

/* -- device connect -- */
static int sd_probe(struct usb_interface *intf,
                        const struct usb_device_id *id)
{
        const struct sd_desc *desc = &sd_desc;

        switch (id->driver_info) {
        case CIT_MODEL0:
        case CIT_MODEL1:
                if (intf->cur_altsetting->desc.bInterfaceNumber != 2)
                        return -ENODEV;
                break;
        case CIT_MODEL2:
        case CIT_MODEL4:
                if (intf->cur_altsetting->desc.bInterfaceNumber != 0)
                        return -ENODEV;
                break;
        case CIT_MODEL3:
                if (intf->cur_altsetting->desc.bInterfaceNumber != 0)
                        return -ENODEV;
                /* FIXME this likely applies to all model3 cams and probably
                   to other models too. */
                if (ibm_netcam_pro)
                        desc = &sd_desc_isoc_nego;
                break;
        }

        return gspca_dev_probe2(intf, id, desc, sizeof(struct sd), THIS_MODULE);
}

static struct usb_driver sd_driver = {
        .name = MODULE_NAME,
        .id_table = device_table,
        .probe = sd_probe,
        .disconnect = gspca_disconnect,
#ifdef CONFIG_PM
        .suspend = gspca_suspend,
        .resume = gspca_resume,
        .reset_resume = gspca_resume,
#endif
};

module_usb_driver(sd_driver);