1 files changed, 103 insertions, 0 deletions
diff --git a/backend/epson2_scsi.c b/backend/epson2_scsi.c
new file mode 100644
index 0000000..89394cd
--- /dev/null
+++ b/backend/epson2_scsi.c
@@ -0,0 +1,103 @@
+#undef BACKEND_NAME
+#define BACKEND_NAME epson2_scsi
+
+#include "../include/sane/config.h"
+#include "../include/sane/sanei_debug.h"
+#include "../include/sane/sanei_scsi.h"
+#include "epson2_scsi.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 <string.h> /* for memset and memcpy */
+#include <stdio.h>
+
+/* sense handler for the sanei_scsi_xxx comands */
+SANE_Status
+sanei_epson2_scsi_sense_handler(int scsi_fd,
+	unsigned char *result, void *arg)
+{
+	/* to get rid of warnings */
+	scsi_fd = scsi_fd;
+	arg = arg;
+
+	if (result[0] && result[0] != 0x70) {
+		DBG(2, "%s: sense code = 0x%02x\n",
+			__FUNCTION__, result[0]);
+		return SANE_STATUS_IO_ERROR;
+	} else {
+		return SANE_STATUS_GOOD;
+	}
+}
+
+SANE_Status
+sanei_epson2_scsi_inquiry(int fd, void *buf, size_t *buf_size)
+{
+	unsigned char cmd[6];
+	int status;
+
+	memset(cmd, 0, 6);
+	cmd[0] = INQUIRY_COMMAND;
+	cmd[4] = *buf_size > 255 ? 255 : *buf_size;
+	status = sanei_scsi_cmd(fd, cmd, sizeof cmd, buf, buf_size);
+
+	return status;
+}
+
+SANE_Status
+sanei_epson2_scsi_test_unit_ready(int fd)
+{
+	unsigned char cmd[6];
+
+	memset(cmd, 0, 6);
+	cmd[0] = TEST_UNIT_READY_COMMAND;
+
+	return sanei_scsi_cmd2(fd, cmd, sizeof(cmd), NULL, 0, NULL, NULL);
+}
+
+int
+sanei_epson2_scsi_read(int fd, void *buf, size_t buf_size,
+		      SANE_Status *status)
+{
+	unsigned 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;
+
+	*status = sanei_scsi_cmd2(fd, cmd, sizeof(cmd), NULL, 0, buf, &buf_size);
+	if (*status == SANE_STATUS_GOOD)
+		return buf_size;
+
+	return 0;
+}
+
+int
+sanei_epson2_scsi_write(int fd, const void *buf, size_t buf_size,
+		       SANE_Status *status)
+{
+	unsigned char cmd[6];
+
+	memset(cmd, 0, sizeof(cmd));
+	cmd[0] = WRITE_6_COMMAND;
+	cmd[2] = buf_size >> 16;
+	cmd[3] = buf_size >> 8;
+	cmd[4] = buf_size;
+
+	*status = sanei_scsi_cmd2(fd, cmd, sizeof(cmd), buf, buf_size, NULL, NULL);
+	if (*status == SANE_STATUS_GOOD)
+		return buf_size;
+
+	return 0;
+}