kopia lustrzana https://gitlab.com/sane-project/backends
Added LM983x library functions
Gerhard Jaeger
rodzic
99ad8e19ff
commit
5d71d97a6b
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@ -49,14 +49,14 @@ LIBSANEI_OBJS = sanei_ab306.o sanei_constrain_value.o sanei_init_debug.o \
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sanei_net.o sanei_wire.o sanei_codec_ascii.o sanei_codec_bin.o \
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sanei_save_values.o sanei_load_values.o \
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sanei_scsi.o sanei_config.o sanei_config2.o sanei_pio.o sanei_pa4s2.o \
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sanei_auth.o sanei_usb.o sanei_thread.o sanei_pv8630.o
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sanei_auth.o sanei_usb.o sanei_thread.o sanei_pv8630.o sanei_lm983x.o
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LIBSANEI_LTOBJS = sanei_ab306.lo sanei_constrain_value.lo sanei_init_debug.lo \
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sanei_net.lo sanei_wire.lo sanei_codec_ascii.lo sanei_codec_bin.lo \
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sanei_save_values.lo sanei_load_values.lo \
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sanei_scsi.lo sanei_config.lo sanei_config2.lo sanei_pio.lo \
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sanei_pa4s2.lo sanei_auth.lo sanei_usb.lo sanei_thread.lo \
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sanei_pv8630.lo
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sanei_pv8630.lo sanei_lm983x.lo
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TARGETS = libsanei.a
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TESTPROGRAMS = test_wire
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@ -65,7 +65,7 @@ DISTFILES = Makefile.in linux_sg3_err.h os2_srb.h sanei_DomainOS.c \
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sanei_DomainOS.h sanei_ab306.c sanei_auth.c sanei_codec_ascii.c \
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sanei_codec_bin.c sanei_config.c sanei_config2.c \
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sanei_constrain_value.c sanei_init_debug.c sanei_load_values.c \
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sanei_net.c sanei_pa4s2.c sanei_pio.c sanei_pv8630.c \
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sanei_net.c sanei_pa4s2.c sanei_pio.c sanei_pv8630.c sanei_lm983x.c \
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sanei_save_values.c sanei_scsi.c sanei_thread.c sanei_usb.c \
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sanei_wire.c test_wire.c
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@ -0,0 +1,325 @@
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/* sane - Scanner Access Now Easy.
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based on sources acquired from Plustek Inc.
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Copyright (C) 2002 Gerhard Jaeger <g.jaeger@earthling.net>
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This file is part of the SANE package.
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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, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston,
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MA 02111-1307, USA.
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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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Interface files for the LM9831/2/3 chip,
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a chip used in many USB scanners.
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*/
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#include "../include/sane/config.h"
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#include <stdlib.h>
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#include <unistd.h>
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#include <string.h>
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#include <errno.h>
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#define BACKEND_NAME sanei_lm983x
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#include "../include/sane/sane.h"
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#include "../include/sane/sanei_debug.h"
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#include "../include/sane/sanei_usb.h"
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#include "../include/sane/sanei_lm983x.h"
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/***************************** some definitions ******************************/
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#define _MIN(a,b) ((a) < (b) ? (a) : (b))
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#define _MAX(a,b) ((a) > (b) ? (a) : (b))
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#define _CMD_BYTE_CNT 4
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#define _MAX_RETRY 20
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#define _LM9831_MAX_REG 0x7f
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#define _MAX_TRANSFER_SIZE 60
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/******************************* the functions *******************************/
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/**
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* function to write one data byte to a specific LM983x register
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*
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* @param fd - device file descriptor
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* @param reg - number of register
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* @param value - byte value to be written
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*
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* @return SANE_STATUS_GOOD - on success
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* SANE_STATUS_IO_ERROR - system write function failed
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* SANE_STATUS_INVAL - register out of range
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*/
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SANE_Status
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sanei_lm983x_write_byte( SANE_Int fd, SANE_Byte reg, SANE_Byte value )
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{
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return sanei_lm983x_write( fd, reg, &value, 1, SANE_FALSE );
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}
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/**
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* function to write one or more data bytes to one ore more specific LM983x
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* registers.
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*
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* @param fd - device file descriptor
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* @param reg - number of start-register
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* @param buffer - buffer to be written
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* @param len - number of bytes to be written
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* @param increment - SANE_TRUE enables the autoincrement of the register
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* value during the write cylce, SANE_FALSE disables this
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*
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* @return SANE_STATUS_GOOD - on success
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* SANE_STATUS_IO_ERROR - system read function failed
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* SANE_STATUS_INVAL - register out of range or len field was 0
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*/
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SANE_Status
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sanei_lm983x_write( SANE_Int fd, SANE_Byte reg,
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SANE_Byte *buffer, SANE_Word len, SANE_Bool increment )
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{
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size_t size;
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SANE_Byte command_buffer[_MAX_TRANSFER_SIZE + _CMD_BYTE_CNT];
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SANE_Status result;
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SANE_Word bytes, max_len;
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DBG( 15, "sanei_lm983x_write: fd=%d, reg=%d, len=%d, increment=%d\n", fd,
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reg, len, increment);
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if( reg > _LM9831_MAX_REG ) {
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DBG( 1, "sanei_lm983x_write: register out of range (%u>%u)\n",
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reg, _LM9831_MAX_REG );
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return SANE_STATUS_INVAL;
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}
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for( bytes = 0; len > 0; ) {
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max_len = _MIN( len, _MAX_TRANSFER_SIZE );
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command_buffer[0] = 0; /* write */
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command_buffer[1] = reg; /* LM9831 register */
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if( increment == SANE_TRUE ) {
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command_buffer[0] += 0x02; /* increase reg? */
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command_buffer[1] += bytes;
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}
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command_buffer[2] = (max_len >> 8) & 0xff; /* bytes to write MSB */
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command_buffer[3] = max_len & 0xff; /* bytes to write LSB */
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memcpy( command_buffer + _CMD_BYTE_CNT, buffer + bytes, max_len );
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size = (max_len + _CMD_BYTE_CNT);
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result = sanei_usb_write_bulk( fd, command_buffer, &size );
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if( SANE_STATUS_GOOD != result )
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return result;
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if( size != (size_t)(max_len + _CMD_BYTE_CNT)) {
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DBG( 2, "sanei_lm983x_write: short write (%d/%d)\n",
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result, max_len + _CMD_BYTE_CNT);
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if( size < _CMD_BYTE_CNT ) {
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DBG( 1, "sanei_lm983x_write: couldn't even send command\n" );
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return SANE_STATUS_IO_ERROR;
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}
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DBG( 1, "sanei_lm983x_write: trying again\n" );
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}
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len -= (size - _CMD_BYTE_CNT);
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bytes += (size - _CMD_BYTE_CNT);
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}
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DBG( 15, "sanei_lm983x_write: succeeded\n" );
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return SANE_STATUS_GOOD;
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}
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/**
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* function to read one or more data bytes from one ore more specific LM983x
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* registers.
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*
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* @param fd - device file descriptor
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* @param reg - number of start-register
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* @param buffer - buffer to receive the data
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* @param len - number of bytes to receive
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* @param increment - SANE_TRUE enables the autoincrement of the register
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* value during the read cylce, SANE_FALSE disables this
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*
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* @return SANE_STATUS_GOOD - on success
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* SANE_STATUS_IO_ERROR - system read function failed
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* SANE_STATUS_INVAL - register out of range
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* SANE_STATUS_EOF - if nothing can't be read
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*/
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SANE_Status
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sanei_lm983x_read( SANE_Int fd, SANE_Byte reg,
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SANE_Byte *buffer, SANE_Word len, SANE_Bool increment )
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{
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size_t size;
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SANE_Byte command_buffer[_CMD_BYTE_CNT];
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SANE_Status result;
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SANE_Word bytes, max_len, read_bytes;
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DBG( 15, "sanei_lm983x_read: fd=%d, reg=%d, len=%d, increment=%d\n",
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fd, reg, len, increment );
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if( reg > _LM9831_MAX_REG ) {
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DBG( 1, "sanei_lm983x_read: register out of range (%u>%u)\n",
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reg, _LM9831_MAX_REG );
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return SANE_STATUS_INVAL;
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}
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for( bytes = 0; len > 0; ) {
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max_len = _MIN(len, 0xFFFF );
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command_buffer[0] = 1; /* read */
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command_buffer[1] = reg; /* LM9831 register */
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if( increment ) {
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command_buffer[0] += 0x02;
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command_buffer[1] += bytes;
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}
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command_buffer[2] = (max_len >> 8) & 0xff; /* bytes to read MSB */
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command_buffer[3] = max_len & 0xff; /* bytes to read LSB */
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DBG( 15, "sanei_lm983x_read: writing command: "
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"%02x %02x %02x %02x\n", command_buffer[0], command_buffer[1],
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command_buffer[2], command_buffer[3]);
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size = _CMD_BYTE_CNT;
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result = sanei_usb_write_bulk( fd, command_buffer, &size );
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if( SANE_STATUS_GOOD != result )
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return result;
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if( size != _CMD_BYTE_CNT) {
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DBG( 1, "sanei_lm983x_read: short write while writing command "
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"(%d/_CMD_BYTE_CNT)\n", result);
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return SANE_STATUS_IO_ERROR;
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}
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read_bytes = 0;
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do {
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size = (max_len - read_bytes);
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result = sanei_usb_read_bulk( fd, (buffer + bytes + read_bytes), &size );
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if( SANE_STATUS_GOOD != result )
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return result;
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read_bytes += size;
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DBG( 15, "sanei_lm983x_read: read %d bytes\n", size );
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if( read_bytes != max_len ) {
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DBG( 2, "sanei_lm983x_read: short read (%d/%d)\n",
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result, max_len );
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/* wait a little bit before retrying */
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usleep( 10000 );
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DBG( 2, "sanei_lm983x_read: trying again\n" );
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}
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} while( read_bytes < max_len );
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bytes += (max_len);
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len -= (max_len);
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}
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DBG( 15, "sanei_lm983x_read: succeeded\n" );
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return SANE_STATUS_GOOD;
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}
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/**
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* function to reset the LM983x chips
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*
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* @param fd - device file descriptor
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* @return SANE_TRUE - reset successfuly done
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* SANE_FALSE - reset failed
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*/
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SANE_Bool sanei_lm983x_reset( SANE_Int fd )
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{
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SANE_Byte cmd_buffer[_CMD_BYTE_CNT];
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SANE_Byte tmp;
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SANE_Int i;
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DBG( 15, "sanei_lm983x_reset()\n" );
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for( i = 0; i < _MAX_RETRY; i++ ) {
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/* Read the command register and check that the reset bit is not set
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* If it is set, clear it and return false to indicate that
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* the bit has only now been cleared
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*
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* Write the command bytes for a register read
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* without increment
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*/
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cmd_buffer[0] = 0x01;
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cmd_buffer[1] = 7; /* command/status register */
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cmd_buffer[2] = 0;
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cmd_buffer[3] = 1;
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if( _CMD_BYTE_CNT == write( fd, cmd_buffer, _CMD_BYTE_CNT )) {
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/* Then read the register in question */
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u_long cbBytes = 1;
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if( read( fd, &tmp, cbBytes )) {
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if( tmp & 0x20 ) {
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SANE_Byte wrt_buffer[_CMD_BYTE_CNT + 1];
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/* Write the command bytes for a register read
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* without increment
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*/
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wrt_buffer[0] = 0x00;
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wrt_buffer[1] = 7;
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wrt_buffer[2] = 0;
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wrt_buffer[3] = 1;
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wrt_buffer[4] = 0; /* <--- The data for the register */
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/* We will attempt to reset it but we really don't do
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* anything if this fails
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*/
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if( write( fd, wrt_buffer, _CMD_BYTE_CNT + 1)) {
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DBG( 15, "Resetting the LM983x done\n" );
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return SANE_TRUE;
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}
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}
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}
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}
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}
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return SANE_FALSE;
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}
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/* END sanei_lm983x.c........................................................*/
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