sane-project-backends/backend/gt68xx_gt6816.c

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/* sane - Scanner Access Now Easy.
Copyright (C) 2002 Sergey Vlasov <vsu@altlinux.ru>
Copyright (C) 2002-2007 Henning Geinitz <sane@geinitz.org>
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.
*/
/** @file
* @brief Implementation of the gt6816 specific functions.
*/
#include "gt68xx_gt6816.h"
SANE_Status
gt6816_check_firmware (GT68xx_Device * dev, SANE_Bool * loaded)
{
SANE_Status status;
GT68xx_Packet req;
memset (req, 0, sizeof (req));
req[0] = 0x70;
req[1] = 0x01;
status = gt68xx_device_small_req (dev, req, req);
if (status != SANE_STATUS_GOOD)
{
/* Assume that firmware is not loaded because without firmware, we need
64 bytes for the result, not 8 */
*loaded = SANE_FALSE;
return SANE_STATUS_GOOD;
}
/* check anyway */
if (req[0] == 0x00 && req[1] == 0x70 && req[2] == 0xff)
*loaded = SANE_TRUE;
else
*loaded = SANE_FALSE;
return SANE_STATUS_GOOD;
}
#define MAX_DOWNLOAD_BLOCK_SIZE 64
SANE_Status
gt6816_download_firmware (GT68xx_Device * dev,
SANE_Byte * data, SANE_Word size)
{
SANE_Status status;
SANE_Byte download_buf[MAX_DOWNLOAD_BLOCK_SIZE];
SANE_Byte check_buf[MAX_DOWNLOAD_BLOCK_SIZE];
SANE_Byte *block;
SANE_Word addr, bytes_left;
GT68xx_Packet boot_req;
SANE_Word block_size = MAX_DOWNLOAD_BLOCK_SIZE;
CHECK_DEV_ACTIVE (dev, "gt6816_download_firmware");
for (addr = 0; addr < size; addr += block_size)
{
bytes_left = size - addr;
if (bytes_left > block_size)
block = data + addr;
else
{
memset (download_buf, 0, block_size);
memcpy (download_buf, data + addr, bytes_left);
block = download_buf;
}
RIE (gt68xx_device_memory_write (dev, addr, block_size, block));
RIE (gt68xx_device_memory_read (dev, addr, block_size, check_buf));
if (memcmp (block, check_buf, block_size) != 0)
{
DBG (3, "gt6816_download_firmware: mismatch at block 0x%0x\n",
addr);
return SANE_STATUS_IO_ERROR;
}
}
memset (boot_req, 0, sizeof (boot_req));
boot_req[0] = 0x69;
boot_req[1] = 0x01;
boot_req[2] = LOBYTE (addr);
boot_req[3] = HIBYTE (addr);
RIE (gt68xx_device_req (dev, boot_req, boot_req));
return SANE_STATUS_GOOD;
}
SANE_Status
gt6816_get_power_status (GT68xx_Device * dev, SANE_Bool * power_ok)
{
SANE_Status status;
GT68xx_Packet req;
memset (req, 0, sizeof (req));
req[0] = 0x3f;
req[1] = 0x01;
RIE (gt68xx_device_req (dev, req, req));
if ((req[0] == 0x00 && req[1] == 0x3f && req[2] == 0x01)
|| (dev->model->flags & GT68XX_FLAG_NO_POWER_STATUS))
*power_ok = SANE_TRUE;
else
*power_ok = SANE_FALSE;
return SANE_STATUS_GOOD;
}
SANE_Status
gt6816_get_ta_status (GT68xx_Device * dev, SANE_Bool * ta_attached)
{
SANE_Status status;
GT68xx_Packet req;
memset (req, 0, sizeof (req));
req[0] = 0x28;
req[1] = 0x01;
RIE (gt68xx_device_req (dev, req, req));
if (req[0] == 0x00 && req[1] == 0x28 && (req[8] & 0x01) != 0
&& !dev->model->is_cis)
*ta_attached = SANE_TRUE;
else
*ta_attached = SANE_FALSE;
return SANE_STATUS_GOOD;
}
SANE_Status
gt6816_lamp_control (GT68xx_Device * dev, SANE_Bool fb_lamp,
SANE_Bool ta_lamp)
{
GT68xx_Packet req;
memset (req, 0, sizeof (req));
req[0] = 0x25;
req[1] = 0x01;
req[2] = 0;
if (fb_lamp)
req[2] |= 0x01;
if (ta_lamp)
req[2] |= 0x02;
return gt68xx_device_req (dev, req, req);
}
SANE_Status
gt6816_is_moving (GT68xx_Device * dev, SANE_Bool * moving)
{
SANE_Status status;
GT68xx_Packet req;
memset (req, 0, sizeof (req));
req[0] = 0x17;
req[1] = 0x01;
RIE (gt68xx_device_req (dev, req, req));
if (req[0] == 0x00 && req[1] == 0x17)
{
if (req[2] == 0 && (req[3] == 0 || req[3] == 2))
*moving = SANE_FALSE;
else
*moving = SANE_TRUE;
}
else
return SANE_STATUS_IO_ERROR;
return SANE_STATUS_GOOD;
}
SANE_Status
gt6816_carriage_home (GT68xx_Device * dev)
{
GT68xx_Packet req;
memset (req, 0, sizeof (req));
req[0] = 0x24;
req[1] = 0x01;
return gt68xx_device_req (dev, req, req);
}
SANE_Status
gt6816_stop_scan (GT68xx_Device * dev)
{
GT68xx_Packet req;
memset (req, 0, sizeof (req));
req[0] = 0x41;
req[1] = 0x01;
return gt68xx_device_small_req (dev, req, req);
}