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/*
* iclick.c
*
* Here, the functions which are needed to get data from the camera.
*
* Copyright (c) 2004 Theodore Kilgore <kilgota@auburn.edu>,
* Stephen Pollei <stephen_pollei@comcast.net>.
* Camera library support under libgphoto2.1.1 for camera(s)
* with chipset from Service & Quality Technologies, Taiwan.
* The chip supported by this driver is presumed to be the SQ915.
*
* This library 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
* Lesser General Public License for more details.
*
* Licensed under GNU Lesser General Public License, as part of Gphoto
* camera support project. For a copy of the license, see the file
* COPYING in the main source tree of libgphoto2.
*/
#include <config.h>
#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
#include <fcntl.h>
#include <string.h>
#include <math.h>
#include <gphoto2/gphoto2.h>
#include <gphoto2/gphoto2-port.h>
#include "iclick.h"
#define GP_MODULE "iclick"
#define SQWRITE gp_port_usb_msg_write
#define SQREAD gp_port_usb_msg_read
#define zero "\x0"
/*
static unsigned char *
icl_read_data (GPPort *port, unsigned char *data, int size)
{
gp_port_read (port, data, size);
return GP_OK;
}
*/
int icl_access_reg (GPPort *port, enum icl_cmnd_type reg)
{
SQWRITE (port, 0x0c, reg,
(CONFIG == reg) ? CONFIG_I : 0,
NULL, 0); /* Access a register */
return GP_OK;
}
int
icl_init (GPPort *port, CameraPrivateLibrary *priv)
{
int i;
static unsigned char dummy_buf[0x28000];
unsigned char *catalog = malloc(0x8000);
unsigned char *catalog_tmp;
priv->model=SQ_MODEL_ICLICK;
if (!catalog) return GP_ERROR_NO_MEMORY;
icl_reset (port);
icl_access_reg(port, CONFIG); /* Access config */
gp_port_read(port, (char *)catalog, 0x8000);
/* Config data is in lines of 16 bytes. Each photo uses two lines. */
icl_read_picture_data(port, dummy_buf, 0x28000);
icl_reset (port);
/* Photo list starts with line 0040. List terminates when we
* the first entry of an even-numbered line is zero. */
for (i=0; i< (0x8000 - 64) && catalog[i+64] ; i+=32)
;
priv->nb_entries = i>>5;
if (i) {
catalog_tmp = realloc(catalog, i);
if (catalog_tmp)
priv->catalog = catalog_tmp;
else
priv->catalog = catalog;
} else {
free(catalog);
priv->catalog = NULL; /* We just have freed catalog_tmp */
}
icl_reset (port);
priv->data_offset = -1;
return GP_OK;
}
int
icl_get_start (CameraPrivateLibrary *priv, int entry)
{
int start = 0x4b100 * entry;
return start;
}
int
icl_get_size (CameraPrivateLibrary *priv, int entry)
{
return 0x4b100;
}
int
icl_get_width_height (CameraPrivateLibrary *priv, int entry, int *w, int *h)
{
*w = 640;
*h = 480;
return GP_OK;
}
int
icl_rewind (GPPort *port, CameraPrivateLibrary *priv)
{
static unsigned char dummy_buf[0x30000];
GP_DEBUG("REWIND cam's data pointer");
/* One has to read the catalog to rewind the data stream...
* I don't know if it's by design.
* There ought to be something better to do... :-/
*/
icl_access_reg(port, CONFIG); /* Access model */
icl_read_picture_data(port, dummy_buf, 0x30000);
icl_reset (port);
icl_access_reg(port, DATA); /* Access photo data */
priv->data_offset = icl_get_start (priv, 0);
return GP_OK;
}
int
icl_reset (GPPort *port)
{
icl_access_reg(port, CLEAR); /* Release current register */
return GP_OK;
}
int
icl_read_picture_data (GPPort *port, unsigned char *data, int size )
{
int remainder = size % 0x8000;
int offset = 0;
while ((offset + 0x8000) <= size) {
gp_port_read (port, (char *)data + offset, 0x8000);
offset += 0x8000;
}
if (remainder)
gp_port_read (port, (char *)data + offset, remainder);
return GP_OK;
}
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