sane-project-backends/backend/snapscan-usb.h

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2001-10-09 09:45:21 +00:00
/*
Snapscan 1212U modifications for the Snapscan SANE backend
Copyright (C) 2000 Henrik Johansson
Henrik Johansson (henrikjo@post.urfors.se)
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.
This file implements USB equivalents to the SCSI routines used by the Snapscan
backend.
*/
/* $Id$
SnapScan backend scan data sources */
#ifndef snapscan_usb_h
#define snapscan_usb_h
typedef SANE_Status (*sense_handler_type)(int fd, u_char *sense_buffer, void *arg);
static SANE_Status snapscani_usb_cmd(int fd, const void *src, size_t src_size,
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void *dst, size_t * dst_size);
static SANE_Status snapscani_usb_open(const char *dev, int *fdp,
sense_handler_type, void*);
static void snapscani_usb_close(int fd);
/*
* USB status codes
*/
#define GOOD 0x00
#define CHECK_CONDITION 0x01
#define CONDITION_GOOD 0x02
#define BUSY 0x04
#define INTERMEDIATE_GOOD 0x08
#define INTERMEDIATE_C_GOOD 0x0a
#define RESERVATION_CONFLICT 0x0c
#define COMMAND_TERMINATED 0x11
#define QUEUE_FULL 0x14
#define STATUS_MASK 0x3e
/*
* USB transaction status
*/
#define TRANSACTION_COMPLETED 0xfb /* Scanner considers the transaction done */
#define TRANSACTION_READ 0xf9 /* Scanner has data to deliver */
#define TRANSACTION_WRITE 0xf8 /* Scanner is expecting more data */
/*
* Busy queue data structure and prototypes
*/
struct usb_busy_queue {
int fd;
void *src;
size_t src_size;
struct usb_busy_queue *next;
};
static struct usb_busy_queue *bqhead,*bqtail;
static int enqueue_bq(int fd,const void *src, size_t src_size);
static void dequeue_bq(void);
static int is_queueable(const char *src);
static SANE_Status atomic_usb_cmd(int fd, const void *src, size_t src_size,
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void *dst, size_t * dst_size);
static SANE_Status usb_cmd(int fd, const void *src, size_t src_size,
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void *dst, size_t * dst_size);
#endif
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/*
* $Log$
* Revision 1.5 2002/04/10 21:45:53 oliverschwartz
* Removed illegal character / removed declaration of bqelements
*
* Revision 1.10 2001/12/09 23:06:45 oliverschwartz
* - use sense handler for USB if scanner reports CHECK_CONDITION
*
* Revision 1.9 2001/11/16 20:23:16 oliverschwartz
* Merge with sane-1.0.6
* - Check USB vendor IDs to avoid hanging scanners
* - fix bug in dither matrix computation
2001-10-09 09:45:21 +00:00
*
* Revision 1.8 2001/09/18 15:01:07 oliverschwartz
* - Read scanner id string again after firmware upload
* to indentify correct model
* - Make firmware upload work for AGFA scanners
* - Change copyright notice
*
* */