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diff --git a/backend/pixma_mp750.c b/backend/pixma_mp750.c
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+/* SANE - Scanner Access Now Easy.
+
+ Copyright (C) 2006-2007 Wittawat Yamwong <wittawat@web.de>
+ Copyright (C) 2011-2013 Rolf Bensch <rolf at bensch hyphen online dot 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)
+};