New upstream version 1.0.29upstream/1.0.29

1 files changed, 0 insertions, 970 deletions

diff --git a/backend/pixma_mp750.c b/backend/pixma_mp750.c
deleted file mode 100644
index 5bd6ef0..0000000
--- a/backend/pixma_mp750.c
+++ /dev/null
@@ -1,970 +0,0 @@
-/* SANE - Scanner Access Now Easy.
-
-   Copyright (C) 2011-2019 Rolf Bensch <rolf at bensch hyphen online dot de>
-   Copyright (C) 2006-2007 Wittawat Yamwong <wittawat@web.de>
-
-   This file is part of the SANE package.
-
-   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.
- */
-
-/****************************************************************************
- * Credits should go to Martin Schewe (http://pixma.schewe.com) who analysed
- * the protocol of MP750.
- ****************************************************************************/
-
-#include "../include/sane/config.h"
-
-#include <stdlib.h>
-#include <string.h>
-
-#include "pixma_rename.h"
-#include "pixma_common.h"
-#include "pixma_io.h"
-
-/* TODO: remove lines marked with SIM. They are inserted so that I can test
-   the subdriver with the simulator. WY */
-
-#ifdef __GNUC__
-# define UNUSED(v) (void) v
-#else
-# define UNUSED(v)
-#endif
-
-#define IMAGE_BLOCK_SIZE 0xc000
-#define CMDBUF_SIZE 512
-#define HAS_PAPER(s) (s[1] == 0)
-#define IS_WARMING_UP(s) (s[7] != 3)
-#define IS_CALIBRATED(s) (s[8] == 0xf)
-
-#define MP750_PID 0x1706
-#define MP760_PID 0x1708
-#define MP780_PID 0x1707
-
-
-enum mp750_state_t
-{
-  state_idle,
-  state_warmup,
-  state_scanning,
-  state_transfering,
-  state_finished
-};
-
-enum mp750_cmd_t
-{
-  cmd_start_session = 0xdb20,
-  cmd_select_source = 0xdd20,
-  cmd_scan_param = 0xde20,
-  cmd_status = 0xf320,
-  cmd_abort_session = 0xef20,
-  cmd_time = 0xeb80,
-  cmd_read_image = 0xd420,
-
-  cmd_activate = 0xcf60,
-  cmd_calibrate = 0xe920,
-  cmd_error_info = 0xff20
-};
-
-typedef struct mp750_t
-{
-  enum mp750_state_t state;
-  pixma_cmdbuf_t cb;
-  unsigned raw_width, raw_height;
-  uint8_t current_status[12];
-
-  uint8_t *buf, *rawimg, *img;
-  /* make new buffer for rgb_to_gray to act on */
-  uint8_t *imgcol;
-  unsigned line_size; /* need in 2 functions */
-
-  unsigned rawimg_left, imgbuf_len, last_block_size, imgbuf_ofs;
-  int shifted_bytes;
-  int stripe_shift; /* for 2400dpi */
-  unsigned last_block;
-
-  unsigned monochrome:1;
-  unsigned needs_abort:1;
-} mp750_t;
-
-
-
-static void mp750_finish_scan (pixma_t * s);
-static void check_status (pixma_t * s);
-
-static int
-has_paper (pixma_t * s)
-{
-  mp750_t *mp = (mp750_t *) s->subdriver;
-  return HAS_PAPER (mp->current_status);
-}
-
-static int
-is_warming_up (pixma_t * s)
-{
-  mp750_t *mp = (mp750_t *) s->subdriver;
-  return IS_WARMING_UP (mp->current_status);
-}
-
-static int
-is_calibrated (pixma_t * s)
-{
-  mp750_t *mp = (mp750_t *) s->subdriver;
-  return IS_CALIBRATED (mp->current_status);
-}
-
-static void
-drain_bulk_in (pixma_t * s)
-{
-  mp750_t *mp = (mp750_t *) s->subdriver;
-  while (pixma_read (s->io, mp->buf, IMAGE_BLOCK_SIZE) >= 0);
-}
-
-static int
-abort_session (pixma_t * s)
-{
-  mp750_t *mp = (mp750_t *) s->subdriver;
-  return pixma_exec_short_cmd (s, &mp->cb, cmd_abort_session);
-}
-
-static int
-query_status (pixma_t * s)
-{
-  mp750_t *mp = (mp750_t *) s->subdriver;
-  uint8_t *data;
-  int error;
-
-  data = pixma_newcmd (&mp->cb, cmd_status, 0, 12);
-  error = pixma_exec (s, &mp->cb);
-  if (error >= 0)
-    {
-      memcpy (mp->current_status, data, 12);
-      PDBG (pixma_dbg (3, "Current status: paper=%u cal=%u lamp=%u\n",
-		       data[1], data[8], data[7]));
-    }
-  return error;
-}
-
-static int
-activate (pixma_t * s, uint8_t x)
-{
-  mp750_t *mp = (mp750_t *) s->subdriver;
-  uint8_t *data = pixma_newcmd (&mp->cb, cmd_activate, 10, 0);
-  data[0] = 1;
-  data[3] = x;
-  return pixma_exec (s, &mp->cb);
-}
-
-static int
-activate_cs (pixma_t * s, uint8_t x)
-{
-   /*SIM*/ check_status (s);
-  return activate (s, x);
-}
-
-static int
-start_session (pixma_t * s)
-{
-  mp750_t *mp = (mp750_t *) s->subdriver;
-  return pixma_exec_short_cmd (s, &mp->cb, cmd_start_session);
-}
-
-static int
-select_source (pixma_t * s)
-{
-  mp750_t *mp = (mp750_t *) s->subdriver;
-  uint8_t *data = pixma_newcmd (&mp->cb, cmd_select_source, 10, 0);
-  data[0] = (s->param->source == PIXMA_SOURCE_ADF) ? 2 : 1;
-  data[1] = 1;
-  return pixma_exec (s, &mp->cb);
-}
-
-static int
-has_ccd_sensor (pixma_t * s)
-{
-  return ((s->cfg->cap & PIXMA_CAP_CCD) != 0);
-}
-
-static int
-is_ccd_grayscale (pixma_t * s)
-{
-  return (has_ccd_sensor (s) && (s->param->channels == 1));
-}
-
-/* CCD sensors don't have a Grayscale mode, but use color mode instead */
-static unsigned
-get_cis_ccd_line_size (pixma_t * s)
-{
-  return (s->param->wx ? s->param->line_size / s->param->w * s->param->wx
-	  : s->param->line_size) * ((is_ccd_grayscale (s)) ? 3 : 1);
-}
-
-static int
-send_scan_param (pixma_t * s)
-{
-  mp750_t *mp = (mp750_t *) s->subdriver;
-  uint8_t *data;
-
-  data = pixma_newcmd (&mp->cb, cmd_scan_param, 0x2e, 0);
-  pixma_set_be16 (s->param->xdpi | 0x8000, data + 0x04);
-  pixma_set_be16 (s->param->ydpi | 0x8000, data + 0x06);
-  pixma_set_be32 (s->param->x, data + 0x08);
-  pixma_set_be32 (s->param->y, data + 0x0c);
-  pixma_set_be32 (mp->raw_width, data + 0x10);
-  pixma_set_be32 (mp->raw_height, data + 0x14);
-  data[0x18] = 8;		/* 8 = color, 4 = grayscale(?) */
-  /* GH: No, there is no grayscale for CCD devices, Windows shows same  */
-  data[0x19] = s->param->depth * ((is_ccd_grayscale (s)) ? 3 : s->param->channels);	/* bits per pixel */
-  data[0x20] = 0xff;
-  data[0x23] = 0x81;
-  data[0x26] = 0x02;
-  data[0x27] = 0x01;
-  data[0x29] = mp->monochrome ? 0 : 1;
-
-  return pixma_exec (s, &mp->cb);
-}
-
-static int
-calibrate (pixma_t * s)
-{
-  mp750_t *mp = (mp750_t *) s->subdriver;
-  return pixma_exec_short_cmd (s, &mp->cb, cmd_calibrate);
-}
-
-static int
-calibrate_cs (pixma_t * s)
-{
-   /*SIM*/ check_status (s);
-  return calibrate (s);
-}
-
-static int
-request_image_block_ex (pixma_t * s, unsigned *size, uint8_t * info,
-			unsigned flag)
-{
-  mp750_t *mp = (mp750_t *) s->subdriver;
-  int error;
-
-  memset (mp->cb.buf, 0, 10);
-  pixma_set_be16 (cmd_read_image, mp->cb.buf);
-  mp->cb.buf[7] = *size >> 8;
-  mp->cb.buf[8] = 4 | flag;
-  mp->cb.reslen = pixma_cmd_transaction (s, mp->cb.buf, 10, mp->cb.buf, 6);
-  mp->cb.expected_reslen = 0;
-  error = pixma_check_result (&mp->cb);
-  if (error >= 0)
-    {
-      if (mp->cb.reslen == 6)
-        {
-          *info = mp->cb.buf[2];
-          *size = pixma_get_be16 (mp->cb.buf + 4);
-        }
-      else
-        {
-          error = PIXMA_EPROTO;
-        }
-    }
-  return error;
-}
-
-static int
-request_image_block (pixma_t * s, unsigned *size, uint8_t * info)
-{
-  return request_image_block_ex (s, size, info, 0);
-}
-
-static int
-request_image_block2 (pixma_t * s, uint8_t * info)
-{
-  unsigned temp = 0;
-  return request_image_block_ex (s, &temp, info, 0x20);
-}
-
-static int
-read_image_block (pixma_t * s, uint8_t * data)
-{
-  int count, temp;
-
-  count = pixma_read (s->io, data, IMAGE_BLOCK_SIZE);
-  if (count < 0)
-    return count;
-  if (count == IMAGE_BLOCK_SIZE)
-    {
-      int error = pixma_read (s->io, &temp, 0);
-      if (error < 0)
-        {
-          PDBG (pixma_dbg
-          (1, "WARNING: reading zero-length packet failed %d\n", error));
-        }
-    }
-  return count;
-}
-
-static int
-read_error_info (pixma_t * s, void *buf, unsigned size)
-{
-  unsigned len = 16;
-  mp750_t *mp = (mp750_t *) s->subdriver;
-  uint8_t *data;
-  int error;
-
-  data = pixma_newcmd (&mp->cb, cmd_error_info, 0, len);
-  error = pixma_exec (s, &mp->cb);
-  if (error >= 0 && buf)
-    {
-      if (len < size)
-        size = len;
-      /* NOTE: I've absolutely no idea what the returned data mean. */
-      memcpy (buf, data, size);
-      error = len;
-    }
-  return error;
-}
-
-static int
-send_time (pixma_t * s)
-{
-  /* TODO: implement send_time() */
-  UNUSED (s);
-  PDBG (pixma_dbg (3, "send_time() is not yet implemented.\n"));
-  return 0;
-}
-
-static int
-handle_interrupt (pixma_t * s, int timeout)
-{
-  int error;
-  uint8_t intr[16];
-
-  error = pixma_wait_interrupt (s->io, intr, sizeof (intr), timeout);
-  if (error == PIXMA_ETIMEDOUT)
-    return 0;
-  if (error < 0)
-    return error;
-  if (error != 16)
-    {
-      PDBG (pixma_dbg (1, "WARNING: unexpected interrupt packet length %d\n",
-		       error));
-      return PIXMA_EPROTO;
-    }
-
-  if (intr[10] & 0x40)
-    send_time (s);
-  if (intr[12] & 0x40)
-    query_status (s);
-  if (intr[15] & 1)
-    s->events = PIXMA_EV_BUTTON2;	/* b/w scan */
-  if (intr[15] & 2)
-    s->events = PIXMA_EV_BUTTON1;	/* color scan */
-  return 1;
-}
-
-static void
-check_status (pixma_t * s)
-{
-  while (handle_interrupt (s, 0) > 0);
-}
-
-static int
-step1 (pixma_t * s)
-{
-  int error, tmo;
-
-  error = activate (s, 0);
-  if (error < 0)
-    return error;
-  error = query_status (s);
-  if (error < 0)
-    return error;
-  if (s->param->source == PIXMA_SOURCE_ADF && !has_paper (s))
-    return PIXMA_ENO_PAPER;
-  error = activate_cs (s, 0);
-   /*SIM*/ if (error < 0)
-    return error;
-  error = activate_cs (s, 0x20);
-  if (error < 0)
-    return error;
-
-  tmo = 60;
-  error = calibrate_cs (s);
-  while (error == PIXMA_EBUSY && --tmo >= 0)
-    {
-      if (s->cancel)
-	return PIXMA_ECANCELED;
-      PDBG (pixma_dbg
-	    (2, "Scanner is busy. Timed out in %d sec.\n", tmo + 1));
-      pixma_sleep (1000000);
-      error = calibrate_cs (s);
-    }
-  return error;
-}
-
-static void
-shift_rgb (const uint8_t * src, unsigned pixels,
-	   int sr, int sg, int sb, int stripe_shift,
-	   int line_size, uint8_t * dst)
-{
-  unsigned st;
-
-  for (; pixels != 0; pixels--)
-    {
-      st = (pixels % 2 == 0) ? -2 * stripe_shift * line_size : 0;
-      *(dst++ + sr + st) = *src++;
-      *(dst++ + sg + st) = *src++;
-      *(dst++ + sb + st) = *src++;
-    }
-}
-
-static uint8_t *
-rgb_to_gray (uint8_t * gptr, const uint8_t * cptr, unsigned pixels, unsigned c)
-{
-  unsigned i, j, g;
-
-  /* gptr: destination gray scale buffer */
-  /* cptr: source color scale buffer */
-  /* c: 3 for 3-channel single-byte data, 6 for double-byte data */
-
-  for (i=0; i < pixels; i++)
-    {
-      for (j = 0, g = 0; j < 3; j++)
-        {
-          g += *cptr++;
-	  if (c == 6) g += (*cptr++ << 8);
-        }
-      g /= 3;
-      *gptr++ = g;
-      if (c == 6) *gptr++ = (g >> 8);
-    }
-  return gptr;
-}
-
-static int
-calc_component_shifting (pixma_t * s)
-{
-  switch (s->cfg->pid)
-    {
-    case MP760_PID:
-      switch (s->param->ydpi)
-	{
-	case 300:
-	  return 3;
-	case 600:
-	  return 6;
-	default:
-	  return s->param->ydpi / 75;
-	}
-      /* never reached */
-      break;
-
-    case MP750_PID:
-    case MP780_PID:
-    default:
-      return 2 * s->param->ydpi / 75;
-    }
-}
-
-static void
-workaround_first_command (pixma_t * s)
-{
-  /* FIXME: Send a dummy command because the device doesn't response to the
-     first command that is sent directly after the USB interface has been
-     set up. Why? USB isn't set up properly? */
-  uint8_t cmd[10];
-  int error;
-
-  if (s->cfg->pid == MP750_PID)
-    return;			/* MP750 doesn't have this problem(?) */
-
-  PDBG (pixma_dbg
-	(1,
-	 "Work-around for the problem: device doesn't response to the first command.\n"));
-  memset (cmd, 0, sizeof (cmd));
-  pixma_set_be16 (cmd_calibrate, cmd);
-  error = pixma_write (s->io, cmd, 10);
-  if (error != 10)
-    {
-      if (error < 0)
-	{
-	  PDBG (pixma_dbg
-		(1, "  Sending a dummy command failed: %s\n",
-		 pixma_strerror (error)));
-	}
-      else
-	{
-	  PDBG (pixma_dbg
-		(1, "  Sending a dummy command failed: count = %d\n", error));
-	}
-      return;
-    }
-  error = pixma_read (s->io, cmd, sizeof (cmd));
-  if (error >= 0)
-    {
-      PDBG (pixma_dbg
-	    (1, "  Got %d bytes response from a dummy command.\n", error));
-    }
-  else
-    {
-      PDBG (pixma_dbg
-	    (1, "  Reading response of a dummy command failed: %s\n",
-	     pixma_strerror (error)));
-    }
-}
-
-static int
-mp750_open (pixma_t * s)
-{
-  mp750_t *mp;
-  uint8_t *buf;
-
-  mp = (mp750_t *) calloc (1, sizeof (*mp));
-  if (!mp)
-    return PIXMA_ENOMEM;
-
-  buf = (uint8_t *) malloc (CMDBUF_SIZE);
-  if (!buf)
-    {
-      free (mp);
-      return PIXMA_ENOMEM;
-    }
-
-  s->subdriver = mp;
-  mp->state = state_idle;
-
-  /* ofs:   0   1    2  3  4  5  6  7  8  9
-     cmd: cmd1 cmd2 00 00 00 00 00 00 00 00
-     data length-^^^^^    => cmd_len_field_ofs
-     |--------- cmd_header_len --------|
-
-     res: res1 res2
-     |---------| res_header_len
-   */
-  mp->cb.buf = buf;
-  mp->cb.size = CMDBUF_SIZE;
-  mp->cb.res_header_len = 2;
-  mp->cb.cmd_header_len = 10;
-  mp->cb.cmd_len_field_ofs = 7;
-
-  handle_interrupt (s, 200);
-  workaround_first_command (s);
-  return 0;
-}
-
-static void
-mp750_close (pixma_t * s)
-{
-  mp750_t *mp = (mp750_t *) s->subdriver;
-
-  mp750_finish_scan (s);
-  free (mp->cb.buf);
-  free (mp);
-  s->subdriver = NULL;
-}
-
-static int
-mp750_check_param (pixma_t * s, pixma_scan_param_t * sp)
-{
-  unsigned raw_width;
-
-  UNUSED (s);
-
-  sp->depth = 8;		/* FIXME: Does MP750 supports other depth? */
-
-  /* GH: my implementation */
-  /*   if ((sp->channels == 3) || (is_ccd_grayscale (s)))
-    raw_width = ALIGN_SUP (sp->w, 4);
-  else
-  raw_width = ALIGN_SUP (sp->w, 12);*/
-
-  /* the above code gives segmentation fault?!? why... it seems to work in the mp750_scan function */
-  raw_width = ALIGN_SUP (sp->w, 4);
-
-  /*sp->line_size = raw_width * sp->channels;*/
-  sp->line_size = raw_width * sp->channels * (sp->depth / 8);  /* no cropping? */
-  return 0;
-}
-
-static int
-mp750_scan (pixma_t * s)
-{
-  mp750_t *mp = (mp750_t *) s->subdriver;
-  int error;
-  uint8_t *buf;
-  unsigned size, dpi, spare;
-
-  dpi = s->param->ydpi;
-  /* add a stripe shift for 2400dpi */
-  mp->stripe_shift = (dpi == 2400) ? 4 : 0;
-
-  if (mp->state != state_idle)
-    return PIXMA_EBUSY;
-
-  /* clear interrupt packets buffer */
-  while (handle_interrupt (s, 0) > 0)
-    {
-    }
-
-  /*  if (s->param->channels == 1)
-    mp->raw_width = ALIGN_SUP (s->param->w, 12);
-  else
-    mp->raw_width = ALIGN_SUP (s->param->w, 4);*/
-
-  /* change to use CCD grayscale mode --- why does this give segmentation error at runtime in mp750_check_param? */
-  if ((s->param->channels == 3) || (is_ccd_grayscale (s)))
-    mp->raw_width = ALIGN_SUP (s->param->w, 4);
-  else
-    mp->raw_width = ALIGN_SUP (s->param->w, 12);
-  /* not sure about MP750, but there is no need for aligning at 12 for the MP760/770, MP780/790 since always use CCD color mode */
-
-  /* modify for stripe shift */
-  spare = 2 * calc_component_shifting (s) + 2 * mp->stripe_shift; /* FIXME: or maybe (2*... + 1)? */
-  mp->raw_height = s->param->h + spare;
-  PDBG (pixma_dbg (3, "raw_width=%u raw_height=%u dpi=%u\n",
-		   mp->raw_width, mp->raw_height, dpi));
-
-  /* PDBG (pixma_dbg (4, "line_size=%"PRIu64"\n",s->param->line_size)); */
-
-  mp->line_size = get_cis_ccd_line_size (s); /* scanner hardware line_size multiplied by 3 for CCD grayscale */
-
-  size = 8 + 2 * IMAGE_BLOCK_SIZE + spare * mp->line_size;
-  buf = (uint8_t *) malloc (size);
-  if (!buf)
-    return PIXMA_ENOMEM;
-  mp->buf = buf;
-  mp->rawimg = buf;
-  mp->imgbuf_ofs = spare * mp->line_size;
-  mp->imgcol = mp->rawimg + IMAGE_BLOCK_SIZE + 8; /* added to make rgb->gray */
-  mp->img = mp->rawimg + IMAGE_BLOCK_SIZE + 8;
-  mp->imgbuf_len = IMAGE_BLOCK_SIZE + mp->imgbuf_ofs;
-  mp->rawimg_left = 0;
-  mp->last_block_size = 0;
-  mp->shifted_bytes = -(int) mp->imgbuf_ofs;
-
-  error = step1 (s);
-  if (error >= 0)
-    error = start_session (s);
-  if (error >= 0)
-    mp->state = state_warmup;
-  if (error >= 0)
-    error = select_source (s);
-  if (error >= 0)
-    error = send_scan_param (s);
-  if (error < 0)
-    {
-      mp750_finish_scan (s);
-      return error;
-    }
-  return 0;
-}
-
-
-static int
-mp750_fill_buffer (pixma_t * s, pixma_imagebuf_t * ib)
-{
-  mp750_t *mp = (mp750_t *) s->subdriver;
-  int error;
-  uint8_t info;
-  unsigned block_size, bytes_received, n;
-  int shift[3], base_shift;
-  int c;
-
-  c = ((is_ccd_grayscale (s)) ? 3 : s->param->channels) * s->param->depth / 8; /* single-byte or double-byte data */
-
-  if (mp->state == state_warmup)
-    {
-      int tmo = 60;
-
-      query_status (s);
-      check_status (s);
- /*SIM*/ while (!is_calibrated (s) && --tmo >= 0)
-        {
-          if (s->cancel)
-            return PIXMA_ECANCELED;
-          if (handle_interrupt (s, 1000) > 0)
-            {
-              block_size = 0;
-              error = request_image_block (s, &block_size, &info);
-               /*SIM*/ if (error < 0)
-          return error;
-            }
-        }
-      if (tmo < 0)
-        {
-          PDBG (pixma_dbg (1, "WARNING: Timed out waiting for calibration\n"));
-          return PIXMA_ETIMEDOUT;
-        }
-      pixma_sleep (100000);
-      query_status (s);
-      if (is_warming_up (s) || !is_calibrated (s))
-        {
-          PDBG (pixma_dbg (1, "WARNING: Wrong status: wup=%d cal=%d\n",
-               is_warming_up (s), is_calibrated (s)));
-          return PIXMA_EPROTO;
-        }
-      block_size = 0;
-      request_image_block (s, &block_size, &info);
-       /*SIM*/ mp->state = state_scanning;
-      mp->last_block = 0;
-    }
-
-  /* TODO: Move to other place, values are constant. */
-  base_shift = calc_component_shifting (s) * mp->line_size;
-  if (s->param->source == PIXMA_SOURCE_ADF)
-    {
-      shift[0] = 0;
-      shift[1] = -base_shift;
-      shift[2] = -2 * base_shift;
-    }
-  else
-    {
-      shift[0] = -2 * base_shift;
-      shift[1] = -base_shift;
-      shift[2] = 0;
-    }
-
-  do
-    {
-      if (mp->last_block_size > 0)
-        {
-          block_size = mp->imgbuf_len - mp->last_block_size;
-          memcpy (mp->img, mp->img + mp->last_block_size, block_size);
-        }
-
-      do
-        {
-          if (s->cancel)
-            return PIXMA_ECANCELED;
-          if (mp->last_block)
-            {
-              /* end of image */
-              info = mp->last_block;
-              if (info != 0x38)
-                {
-                  query_status (s);
-                   /*SIM*/ while ((info & 0x28) != 0x28)
-                    {
-                      pixma_sleep (10000);
-                      error = request_image_block2 (s, &info);
-                      if (s->cancel)
-                        return PIXMA_ECANCELED;	/* FIXME: Is it safe to cancel here? */
-                      if (error < 0)
-                        return error;
-                    }
-                }
-              mp->needs_abort = (info != 0x38);
-              mp->last_block = info;
-              mp->state = state_finished;
-              return 0;
-            }
-
-          check_status (s);
-           /*SIM*/ while (handle_interrupt (s, 1) > 0);
-           /*SIM*/ block_size = IMAGE_BLOCK_SIZE;
-          error = request_image_block (s, &block_size, &info);
-          if (error < 0)
-            {
-              if (error == PIXMA_ECANCELED)
-                read_error_info (s, NULL, 0);
-              return error;
-            }
-          mp->last_block = info;
-          if ((info & ~0x38) != 0)
-            {
-              PDBG (pixma_dbg (1, "WARNING: Unknown info byte %x\n", info));
-            }
-          if (block_size == 0)
-            {
-              /* no image data at this moment. */
-              pixma_sleep (10000);
-            }
-        }
-      while (block_size == 0);
-
-      error = read_image_block (s, mp->rawimg + mp->rawimg_left);
-      if (error < 0)
-	{
-	  mp->state = state_transfering;
-	  return error;
-	}
-      bytes_received = error;
-      PASSERT (bytes_received == block_size);
-
-      /* TODO: simplify! */
-      mp->rawimg_left += bytes_received;
-      n = mp->rawimg_left / 3;
-      /* n = number of pixels in the buffer? */
-
-      /* Color to Grayscale converion for CCD sensor */
-      if (is_ccd_grayscale (s)) {
-	shift_rgb (mp->rawimg, n, shift[0], shift[1], shift[2], mp->stripe_shift, mp->line_size,
-		   mp->imgcol + mp->imgbuf_ofs);
-	/* dst: img, src: imgcol */
-	rgb_to_gray (mp->img, mp->imgcol, n, c); /* cropping occurs later? */
-	PDBG (pixma_dbg (4, "*fill_buffer: did grayscale conversion \n"));
-      }
-      /* Color image processing */
-      else {
-	shift_rgb (mp->rawimg, n, shift[0], shift[1], shift[2], mp->stripe_shift, mp->line_size,
-		   mp->img + mp->imgbuf_ofs);
-	PDBG (pixma_dbg (4, "*fill_buffer: no grayscale conversion---keep color \n"));
-      }
-
-      /* entering remaining unprocessed bytes after last complete pixel into mp->rawimg buffer -- no influence on mp->img */
-      n *= 3;
-      mp->shifted_bytes += n;
-      mp->rawimg_left -= n;	/* rawimg_left = 0, 1 or 2 bytes left in the buffer. */
-      mp->last_block_size = n;
-      memcpy (mp->rawimg, mp->rawimg + n, mp->rawimg_left);
-
-    }
-  while (mp->shifted_bytes <= 0);
-
-  if ((unsigned) mp->shifted_bytes < mp->last_block_size)
-    {
-      if (is_ccd_grayscale (s))
-	ib->rptr = mp->img + mp->last_block_size/3 - mp->shifted_bytes/3; /* testing---works OK */
-      else
-	ib->rptr = mp->img + mp->last_block_size - mp->shifted_bytes;
-    }
-  else
-    ib->rptr = mp->img;
-  if (is_ccd_grayscale (s))
-    ib->rend = mp->img + mp->last_block_size/3; /* testing---works OK */
-  else
-    ib->rend = mp->img + mp->last_block_size;
-  return ib->rend - ib->rptr;
-}
-
-static void
-mp750_finish_scan (pixma_t * s)
-{
-  int error;
-  mp750_t *mp = (mp750_t *) s->subdriver;
-
-  switch (mp->state)
-    {
-    case state_transfering:
-      drain_bulk_in (s);
-      /* fall through */
-    case state_scanning:
-    case state_warmup:
-      error = abort_session (s);
-      if (error == PIXMA_ECANCELED)
-	read_error_info (s, NULL, 0);
-      /* fall through */
-    case state_finished:
-      if (s->param->source == PIXMA_SOURCE_FLATBED)
-	{
-	   /*SIM*/ query_status (s);
-	  if (abort_session (s) == PIXMA_ECANCELED)
-	    {
-	      read_error_info (s, NULL, 0);
-	      query_status (s);
-	    }
-	}
-      query_status (s);
-       /*SIM*/ activate (s, 0);
-      if (mp->needs_abort)
-	{
-	  mp->needs_abort = 0;
-	  abort_session (s);
-	}
-      free (mp->buf);
-      mp->buf = mp->rawimg = NULL;
-      mp->state = state_idle;
-      /* fall through */
-    case state_idle:
-      break;
-    }
-}
-
-static void
-mp750_wait_event (pixma_t * s, int timeout)
-{
-  /* FIXME: timeout is not correct. See usbGetCompleteUrbNoIntr() for
-   * instance. */
-  while (s->events == 0 && handle_interrupt (s, timeout) > 0)
-    {
-    }
-}
-
-static int
-mp750_get_status (pixma_t * s, pixma_device_status_t * status)
-{
-  int error;
-
-  error = query_status (s);
-  if (error < 0)
-    return error;
-  status->hardware = PIXMA_HARDWARE_OK;
-  status->adf = (has_paper (s)) ? PIXMA_ADF_OK : PIXMA_ADF_NO_PAPER;
-  status->cal =
-    (is_calibrated (s)) ? PIXMA_CALIBRATION_OK : PIXMA_CALIBRATION_OFF;
-  status->lamp = (is_warming_up (s)) ? PIXMA_LAMP_WARMING_UP : PIXMA_LAMP_OK;
-  return 0;
-}
-
-
-static const pixma_scan_ops_t pixma_mp750_ops = {
-  mp750_open,
-  mp750_close,
-  mp750_scan,
-  mp750_fill_buffer,
-  mp750_finish_scan,
-  mp750_wait_event,
-  mp750_check_param,
-  mp750_get_status
-};
-
-#define DEVICE(name, model, pid, dpi, cap) {		\
-	name,                  /* name */		\
-	model,                 /* model */		\
-	0x04a9, pid,           /* vid pid */		\
-	0,                     /* iface */		\
-	&pixma_mp750_ops,      /* ops */		\
-	dpi, 2*(dpi),          /* xdpi, ydpi */		\
-        0, 0,                  /* adftpu_min_dpi & adftpu_max_dpi not used in this subdriver */ \
-        0, 0,                  /* tpuir_min_dpi & tpuir_max_dpi not used in this subdriver */   \
-	637, 877,              /* width, height */	\
-        PIXMA_CAP_GRAY|PIXMA_CAP_EVENTS|cap             \
-}
-
-const pixma_config_t pixma_mp750_devices[] = {
-  DEVICE ("Canon PIXMA MP750", "MP750", MP750_PID, 2400, PIXMA_CAP_CCD | PIXMA_CAP_ADF),
-  DEVICE ("Canon PIXMA MP760/770", "MP760/770", MP760_PID, 2400, PIXMA_CAP_CCD | PIXMA_CAP_TPU),
-  DEVICE ("Canon PIXMA MP780/790", "MP780/790", MP780_PID, 2400, PIXMA_CAP_CCD | PIXMA_CAP_ADF),
-  DEVICE (NULL, NULL, 0, 0, 0)
-};