/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _GPIB_CMD_H#define _GPIB_CMD_H #include <linux/types.h> /* Command byte definitions tests and functions */ /* mask of bits that actually matter in a command byte */enum {	gpib_command_mask = 0x7f,}; /* Possible GPIB command messages */ enum cmd_byte {	GTL = 0x1,	/* go to local			*/	SDC = 0x4,	/* selected device clear	*/	PP_CONFIG = 0x5,	GET = 0x8,	/* group execute trigger	*/	TCT = 0x9,	/* take control			*/	LLO = 0x11,	/* local lockout		*/	DCL = 0x14,	/* device clear			*/	PPU = 0x15,	/* parallel poll unconfigure	*/	SPE = 0x18,	/* serial poll enable		*/	SPD = 0x19,	/* serial poll disable		*/	CFE = 0x1f,     /* configure enable */	LAD = 0x20,	/* value to be 'ored' in to obtain listen address */	UNL = 0x3F,	/* unlisten			*/	TAD = 0x40,	/* value to be 'ored' in to obtain talk address	  */	UNT = 0x5F,	/* untalk			*/	SAD = 0x60,	/* my secondary address (base) */	PPE = 0x60,	/* parallel poll enable (base)	*/	PPD = 0x70	/* parallel poll disable	*/}; /* confine address to range 0 to 30. */static inline unsigned int gpib_address_restrict(u32 addr){	addr &= 0x1f;	if (addr == 0x1f)		addr = 0;	return addr;} static inline u8 MLA(u32 addr){	return gpib_address_restrict(addr) | LAD;} static inline u8 MTA(u32 addr){	return gpib_address_restrict(addr) | TAD;} static inline u8 MSA(u32 addr){	return (addr & 0x1f) | SAD;} static inline s32 gpib_address_equal(u32 pad1, s32 sad1, u32 pad2, s32 sad2){	if (pad1 == pad2) {		if (sad1 == sad2)			return 1;		if (sad1 < 0 && sad2 < 0)			return 1;	} 	return 0;} static inline s32 is_PPE(u8 command){	return (command & 0x70) == 0x60;} static inline s32 is_PPD(u8 command){	return (command & 0x70) == 0x70;} static inline s32 in_addressed_command_group(u8 command){	return (command & 0x70) == 0x0;} static inline s32 in_universal_command_group(u8 command){	return (command & 0x70) == 0x10;} static inline s32 in_listen_address_group(u8 command){	return (command & 0x60) == 0x20;} static inline s32 in_talk_address_group(u8 command){	return (command & 0x60) == 0x40;} static inline s32 in_primary_command_group(u8 command){	return in_addressed_command_group(command) ||		in_universal_command_group(command) ||		in_listen_address_group(command) ||		in_talk_address_group(command);} #endif /* _GPIB_CMD_H */