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/*
* File: sg.h
* Author: karl
*/
#ifndef STLINK_SG_H
#define STLINK_SG_H
#include <stlink.h>
#include <libusb_settings.h>
#ifdef __cplusplus
extern "C" {
#endif
/* Device access */
#define RDWR 0
#define RO 1
#define SG_TIMEOUT_SEC 1 // actually 1 is about 2 sec
#define SG_TIMEOUT_MSEC 3 * 1000
// Each CDB can be a total of 6, 10, 12, or 16 bytes, later version of the SCSI standard
// also allow for variable-length CDBs (min. CDB is 6). The stlink needs max. 10 bytes.
#define CDB_6 6
#define CDB_10 10
#define CDB_12 12
#define CDB_16 16
#define CDB_SL 10
/* Query data flow direction */
#define Q_DATA_OUT 0
#define Q_DATA_IN 1
// The SCSI Request Sense command is used to obtain sense data (error information) from
// a target device. (http://en.wikipedia.org/wiki/SCSI_Request_Sense_Command)
#define SENSE_BUF_LEN 32
struct stlink_libsg {
libusb_context* libusb_ctx;
libusb_device_handle *usb_handle;
unsigned ep_rep;
unsigned ep_req;
int sg_fd;
int do_scsi_pt_err;
unsigned char cdb_cmd_blk[CDB_SL];
int q_data_dir; // Q_DATA_IN, Q_DATA_OUT
// the start of the query data in the device memory space
uint32_t q_addr;
// Sense (error information) data
// obsolete, this was fed to the scsi tools
unsigned char sense_buf[SENSE_BUF_LEN];
struct stlink_reg reg;
};
stlink_t* stlink_v1_open(const int verbose, int reset);
#ifdef __cplusplus
}
#endif
#endif // STLINK_SG_H
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