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/* SPDX-License-Identifier: GPL-2.0 */
/***************************************************************************
* copyright : (C) 2002 by Frank Mori Hess
***************************************************************************/
#ifndef _GPIB_H
#define _GPIB_H
#define GPIB_MAX_NUM_BOARDS 16
#define GPIB_MAX_NUM_DESCRIPTORS 0x1000
enum ibsta_bit_numbers {
DCAS_NUM = 0,
DTAS_NUM = 1,
LACS_NUM = 2,
TACS_NUM = 3,
ATN_NUM = 4,
CIC_NUM = 5,
REM_NUM = 6,
LOK_NUM = 7,
CMPL_NUM = 8,
EVENT_NUM = 9,
SPOLL_NUM = 10,
RQS_NUM = 11,
SRQI_NUM = 12,
END_NUM = 13,
TIMO_NUM = 14,
ERR_NUM = 15
};
/* IBSTA status bits (returned by all functions) */
enum ibsta_bits {
DCAS = (1 << DCAS_NUM), /* device clear state */
DTAS = (1 << DTAS_NUM), /* device trigger state */
LACS = (1 << LACS_NUM), /* GPIB interface is addressed as Listener */
TACS = (1 << TACS_NUM), /* GPIB interface is addressed as Talker */
ATN = (1 << ATN_NUM), /* Attention is asserted */
CIC = (1 << CIC_NUM), /* GPIB interface is Controller-in-Charge */
REM = (1 << REM_NUM), /* remote state */
LOK = (1 << LOK_NUM), /* lockout state */
CMPL = (1 << CMPL_NUM), /* I/O is complete */
EVENT = (1 << EVENT_NUM), /* DCAS, DTAS, or IFC has occurred */
SPOLL = (1 << SPOLL_NUM), /* board serial polled by busmaster */
RQS = (1 << RQS_NUM), /* Device requesting service */
SRQI = (1 << SRQI_NUM), /* SRQ is asserted */
END = (1 << END_NUM), /* EOI or EOS encountered */
TIMO = (1 << TIMO_NUM), /* Time limit on I/O or wait function exceeded */
ERR = (1 << ERR_NUM), /* Function call terminated on error */
device_status_mask = ERR | TIMO | END | CMPL | RQS,
board_status_mask = ERR | TIMO | END | CMPL | SPOLL |
EVENT | LOK | REM | CIC | ATN | TACS | LACS | DTAS | DCAS | SRQI,
};
/* End-of-string (EOS) modes for use with ibeos */
enum eos_flags {
EOS_MASK = 0x1c00,
REOS = 0x0400, /* Terminate reads on EOS */
XEOS = 0x800, /* assert EOI when EOS char is sent */
BIN = 0x1000 /* Do 8-bit compare on EOS */
};
/* GPIB Bus Control Lines bit vector */
enum bus_control_line {
VALID_DAV = 0x01,
VALID_NDAC = 0x02,
VALID_NRFD = 0x04,
VALID_IFC = 0x08,
VALID_REN = 0x10,
VALID_SRQ = 0x20,
VALID_ATN = 0x40,
VALID_EOI = 0x80,
VALID_ALL = 0xff,
BUS_DAV = 0x0100, /* DAV line status bit */
BUS_NDAC = 0x0200, /* NDAC line status bit */
BUS_NRFD = 0x0400, /* NRFD line status bit */
BUS_IFC = 0x0800, /* IFC line status bit */
BUS_REN = 0x1000, /* REN line status bit */
BUS_SRQ = 0x2000, /* SRQ line status bit */
BUS_ATN = 0x4000, /* ATN line status bit */
BUS_EOI = 0x8000 /* EOI line status bit */
};
enum ppe_bits {
PPC_DISABLE = 0x10,
PPC_SENSE = 0x8, /* parallel poll sense bit */
PPC_DIO_MASK = 0x7
};
enum {
request_service_bit = 0x40,
};
enum gpib_events {
EVENT_NONE = 0,
EVENT_DEV_TRG = 1,
EVENT_DEV_CLR = 2,
EVENT_IFC = 3
};
#endif /* _GPIB_H */
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