sane-project-backends/backend/epson_scsi.c

110 wiersze
2.0 KiB
C
Czysty Zwykły widok Historia

#ifdef _AIX
# include "../include/lalloca.h" /* MUST come first for AIX! */
#endif
#include <string.h> /* for memset and memcpy */
#include "../include/sane/config.h"
#include <sane/sanei_debug.h>
#include <sane/sanei_scsi.h>
#include "epson_scsi.h"
#include "../include/lalloca.h"
#ifdef HAVE_STDDEF_H
#include <stddef.h>
#endif
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#ifdef NEED_SYS_TYPES_H
#include <sys/types.h>
#endif
#include <stdio.h>
/*
* sense handler for the sanei_scsi_XXX comands
*/
SANE_Status
sanei_epson_scsi_sense_handler(int scsi_fd, u_char *result, void *arg)
{
/* to get rid of warnings */
scsi_fd = scsi_fd;
arg = arg;
if (result[0] && result[0]!=0x70)
{
DBG (2, "sense_handler() : sense code = 0x%02x\n", result[0]);
return SANE_STATUS_IO_ERROR;
}
else
{
return SANE_STATUS_GOOD;
}
}
/*
*
*
*/
SANE_Status
sanei_epson_scsi_inquiry(int fd, int page_code, void * buf, size_t * buf_size)
{
u_char cmd [ 6];
int status;
memset( cmd, 0, 6);
cmd[ 0] = INQUIRY_COMMAND;
cmd[ 2] = page_code;
cmd[ 4] = *buf_size > 255 ? 255 : *buf_size;
status = sanei_scsi_cmd( fd, cmd, sizeof cmd, buf, buf_size);
return status;
}
/*
*
*
*/
int
sanei_epson_scsi_read(int fd, void * buf, size_t buf_size, SANE_Status * status)
{
u_char cmd [ 6];
memset( cmd, 0, 6);
cmd[ 0] = READ_6_COMMAND;
cmd[ 2] = buf_size >> 16;
cmd[ 3] = buf_size >> 8;
cmd[ 4] = buf_size;
if( SANE_STATUS_GOOD == ( *status = sanei_scsi_cmd( fd, cmd, sizeof( cmd), buf, &buf_size)))
return buf_size;
return 0;
}
/*
*
*
*/
int
sanei_epson_scsi_write(int fd, const void * buf, size_t buf_size, SANE_Status * status)
{
u_char * cmd;
cmd = alloca(8 + buf_size);
memset( cmd, 0, 8);
cmd[ 0] = WRITE_6_COMMAND;
cmd[ 2] = buf_size >> 16;
cmd[ 3] = buf_size >> 8;
cmd[ 4] = buf_size;
memcpy( cmd + 8, buf, buf_size);
if( SANE_STATUS_GOOD == ( *status = sanei_scsi_cmd2( fd, cmd, 6, cmd + 8, buf_size, NULL, NULL)))
return buf_size;
return 0;
}