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+/* sane - Scanner Access Now Easy.
+
+ ScanMaker 3840 Backend
+ Copyright (C) 2005-7 Earle F. Philhower, III
+ earle@ziplabel.com - http://www.ziplabel.com
+
+ This program is free software; you can redistribute it and/or
+ modify it under the terms of the GNU General Public License as
+ published by the Free Software Foundation; either version 2 of the
+ License, or (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place - Suite 330, Boston,
+ MA 02111-1307, USA.
+
+ As a special exception, the authors of SANE give permission for
+ additional uses of the libraries contained in this release of SANE.
+
+ The exception is that, if you link a SANE library with other files
+ to produce an executable, this does not by itself cause the
+ resulting executable to be covered by the GNU General Public
+ License. Your use of that executable is in no way restricted on
+ account of linking the SANE library code into it.
+
+ This exception does not, however, invalidate any other reasons why
+ the executable file might be covered by the GNU General Public
+ License.
+
+ If you submit changes to SANE to the maintainers to be included in
+ a subsequent release, you agree by submitting the changes that
+ those changes may be distributed with this exception intact.
+
+ If you write modifications of your own for SANE, it is your choice
+ whether to permit this exception to apply to your modifications.
+ If you do not wish that, delete this exception notice.
+
+*/
+
+#include <stdio.h>
+#include <stdarg.h>
+
+#ifndef BACKENDNAME
+#include <usb.h>
+#include <string.h>
+
+#ifndef DEFINED_USB_HANDLE
+#define DEFINED_USB_HANDLE
+typedef usb_dev_handle *p_usb_dev_handle;
+#endif
+
+static p_usb_dev_handle find_device (unsigned int idVendor,
+ unsigned int idProduct);
+#else
+#include "../include/sane/sanei_usb.h"
+
+#ifndef USBWRAPPER
+#define USBWRAPPER
+
+typedef SANE_Int p_usb_dev_handle;
+#define usb_control_msg my_usb_control_msg
+#define usb_bulk_read my_usb_bulk_read
+#define usb_bulk_write my_usb_bulk_write
+static int my_usb_bulk_write (p_usb_dev_handle dev, int ep,
+ unsigned char *bytes,
+ int size, int timeout);
+static int my_usb_bulk_read (p_usb_dev_handle dev, int ep,
+ unsigned char *bytes,
+ int size, int timeout);
+static int my_usb_control_msg (p_usb_dev_handle dev, int requesttype,
+ int request, int value, int index,
+ unsigned char *bytes,
+ int size, int timeout);
+#endif /* USBWRAPPER */
+
+#endif
+
+#include "sm3840_params.h"
+
+static void idle_ab (p_usb_dev_handle udev);
+static void write_regs (p_usb_dev_handle udev, int regs, unsigned char reg1,
+ unsigned char val1,
+ ... /*unsigned char reg, unsigned char val, ... */ );
+static int write_vctl (p_usb_dev_handle udev, int request, int value,
+ int index, unsigned char byte);
+static int read_vctl (p_usb_dev_handle udev, int request, int value,
+ int index, unsigned char *byte);
+
+#ifndef BACKENDNAME
+static void record (p_usb_dev_handle udev, char *fname, int bytes);
+static void record_image (p_usb_dev_handle udev, char *fname, int dpi,
+ int scanpix, int scanlines, int gray, char *head,
+ int bpp16);
+static void check_buttons (p_usb_dev_handle udev, int *scan, int *print,
+ int *mail);
+static void record_head (p_usb_dev_handle udev, char *fname, int bytes,
+ char *header);
+#endif
+
+static void poll1 (p_usb_dev_handle udev);
+static void poll2 (p_usb_dev_handle udev);
+
+static void reset_scanner (p_usb_dev_handle udev);
+
+
+static void set_lightmap_white (unsigned short *map, int dpi, int color);
+
+static void calc_lightmap (unsigned short *buff,
+ unsigned short *storage, int index, int dpi,
+ double gain, int offset);
+static void select_pixels (unsigned short *map, int dpi, int start, int end);
+
+static void record_mem (p_usb_dev_handle udev, unsigned char **dest,
+ int bytes);
+static void set_lamp_timer (p_usb_dev_handle udev, int timeout_in_mins);
+
+static void set_gain_black (p_usb_dev_handle udev,
+ int r_gain, int g_gain, int b_gain,
+ int r_black, int g_black, int b_black);
+
+static void idle_ab (p_usb_dev_handle udev);
+static void write_regs (p_usb_dev_handle udev, int regs, unsigned char reg1,
+ unsigned char val1,
+ ... /*unsigned char reg, unsigned char val, ... */ );
+static int write_vctl (p_usb_dev_handle udev, int request, int value,
+ int index, unsigned char byte);
+static int read_vctl (p_usb_dev_handle udev, int request, int value,
+ int index, unsigned char *byte);
+
+static void download_lut8 (p_usb_dev_handle udev, int dpi, int incolor);
+
+static void record_line (int reset,
+ p_usb_dev_handle udev,
+ unsigned char *storeline,
+ int dpi, int scanpix, int gray, int bpp16,
+ int *save_i,
+ unsigned char **save_scan_line,
+ unsigned char **save_dpi1200_remap,
+ unsigned char **save_color_remap);
+
+
+static void prepare_params (SM3840_Params * params);
+
+static void fix_endian_short (unsigned short *data, int count);
+
+#define rd_timeout 10000
+#define wr_timeout 10000