kopia lustrzana https://gitlab.com/sane-project/backends
127 wiersze
4.2 KiB
C
127 wiersze
4.2 KiB
C
/*
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Snapscan 1212U modifications for the Snapscan SANE backend
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Copyright (C) 2000 Henrik Johansson
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Henrik Johansson (henrikjo@post.urfors.se)
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>.
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As a special exception, the authors of SANE give permission for
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additional uses of the libraries contained in this release of SANE.
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The exception is that, if you link a SANE library with other files
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to produce an executable, this does not by itself cause the
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resulting executable to be covered by the GNU General Public
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License. Your use of that executable is in no way restricted on
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account of linking the SANE library code into it.
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This exception does not, however, invalidate any other reasons why
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the executable file might be covered by the GNU General Public
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License.
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If you submit changes to SANE to the maintainers to be included in
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a subsequent release, you agree by submitting the changes that
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those changes may be distributed with this exception intact.
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If you write modifications of your own for SANE, it is your choice
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whether to permit this exception to apply to your modifications.
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If you do not wish that, delete this exception notice.
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This file implements USB equivalents to the SCSI routines used by the Snapscan
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backend.
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*/
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/*
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SnapScan backend scan data sources
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*/
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#ifndef snapscan_usb_h
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#define snapscan_usb_h
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typedef SANE_Status (*sense_handler_type)(int fd, u_char *sense_buffer, void *arg);
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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);
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static SANE_Status snapscani_usb_open(const char *dev, int *fdp,
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sense_handler_type, void*);
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static void snapscani_usb_close(int fd);
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/*
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* USB status codes
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*/
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#define GOOD 0x00
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#define CHECK_CONDITION 0x01
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#define CONDITION_GOOD 0x02
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#define BUSY 0x04
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#define INTERMEDIATE_GOOD 0x08
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#define INTERMEDIATE_C_GOOD 0x0a
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#define RESERVATION_CONFLICT 0x0c
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#define COMMAND_TERMINATED 0x11
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#define QUEUE_FULL 0x14
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#define STATUS_MASK 0x3e
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/*
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* USB transaction status
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*/
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#define TRANSACTION_COMPLETED 0xfb /* Scanner considers the transaction done */
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#define TRANSACTION_READ 0xf9 /* Scanner has data to deliver */
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#define TRANSACTION_WRITE 0xf8 /* Scanner is expecting more data */
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/*
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* Busy queue data structure and prototypes
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*/
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struct usb_busy_queue {
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int fd;
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void *src;
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size_t src_size;
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struct usb_busy_queue *next;
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};
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static struct usb_busy_queue *bqhead,*bqtail;
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static int enqueue_bq(int fd,const void *src, size_t src_size);
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static void dequeue_bq(void);
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static int is_queueable(const char *src);
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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);
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static SANE_Status usb_cmd(int fd, const void *src, size_t src_size,
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void *dst, size_t * dst_size);
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#endif
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/*
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* Revision 1.6 2003/07/26 17:16:55 oliverschwartz
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* Changed licence to GPL + SANE exception for snapscan-usb.[ch]
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*
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* Revision 1.5 2002/04/10 21:45:53 oliverschwartz
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* Removed illegal character / removed declaration of bqelements
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*
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* Revision 1.10 2001/12/09 23:06:45 oliverschwartz
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* - use sense handler for USB if scanner reports CHECK_CONDITION
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*
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* Revision 1.9 2001/11/16 20:23:16 oliverschwartz
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* Merge with sane-1.0.6
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* - Check USB vendor IDs to avoid hanging scanners
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* - fix bug in dither matrix computation
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*
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* Revision 1.8 2001/09/18 15:01:07 oliverschwartz
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* - Read scanner id string again after firmware upload
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* to identify correct model
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* - Make firmware upload work for AGFA scanners
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* - Change copyright notice
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*
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* */
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