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e6ab504633
Move the gpib drivers out of staging and into the "real" part of the kernel. This entails: - Remove the gpib Kconfig menu and Makefile build rule from staging. - Remove gpib/uapi from the header file search path in subdir-ccflags of the gpib Makefile - move the gpib/uapi files to include/uapi/linux - Move the gpib tree out of staging to drivers. - Remove the word "Linux" from the gpib Kconfig file. - Add the gpib Kconfig menu and Makefile build rule to drivers Signed-off-by: Dave Penkler <dpenkler@gmail.com> Link: https://patch.msgid.link/20251117144021.23569-5-dpenkler@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
113 lines
2.3 KiB
C
113 lines
2.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _GPIB_CMD_H
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#define _GPIB_CMD_H
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#include <linux/types.h>
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/* Command byte definitions tests and functions */
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/* mask of bits that actually matter in a command byte */
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enum {
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gpib_command_mask = 0x7f,
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};
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/* Possible GPIB command messages */
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enum cmd_byte {
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GTL = 0x1, /* go to local */
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SDC = 0x4, /* selected device clear */
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PP_CONFIG = 0x5,
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GET = 0x8, /* group execute trigger */
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TCT = 0x9, /* take control */
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LLO = 0x11, /* local lockout */
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DCL = 0x14, /* device clear */
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PPU = 0x15, /* parallel poll unconfigure */
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SPE = 0x18, /* serial poll enable */
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SPD = 0x19, /* serial poll disable */
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CFE = 0x1f, /* configure enable */
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LAD = 0x20, /* value to be 'ored' in to obtain listen address */
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UNL = 0x3F, /* unlisten */
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TAD = 0x40, /* value to be 'ored' in to obtain talk address */
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UNT = 0x5F, /* untalk */
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SAD = 0x60, /* my secondary address (base) */
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PPE = 0x60, /* parallel poll enable (base) */
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PPD = 0x70 /* parallel poll disable */
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};
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/* confine address to range 0 to 30. */
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static inline unsigned int gpib_address_restrict(u32 addr)
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{
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addr &= 0x1f;
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if (addr == 0x1f)
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addr = 0;
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return addr;
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}
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static inline u8 MLA(u32 addr)
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{
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return gpib_address_restrict(addr) | LAD;
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}
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static inline u8 MTA(u32 addr)
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{
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return gpib_address_restrict(addr) | TAD;
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}
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static inline u8 MSA(u32 addr)
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{
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return (addr & 0x1f) | SAD;
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}
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static inline s32 gpib_address_equal(u32 pad1, s32 sad1, u32 pad2, s32 sad2)
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{
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if (pad1 == pad2) {
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if (sad1 == sad2)
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return 1;
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if (sad1 < 0 && sad2 < 0)
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return 1;
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}
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return 0;
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}
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static inline s32 is_PPE(u8 command)
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{
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return (command & 0x70) == 0x60;
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}
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static inline s32 is_PPD(u8 command)
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{
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return (command & 0x70) == 0x70;
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}
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static inline s32 in_addressed_command_group(u8 command)
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{
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return (command & 0x70) == 0x0;
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}
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static inline s32 in_universal_command_group(u8 command)
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{
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return (command & 0x70) == 0x10;
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}
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static inline s32 in_listen_address_group(u8 command)
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{
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return (command & 0x60) == 0x20;
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}
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static inline s32 in_talk_address_group(u8 command)
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{
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return (command & 0x60) == 0x40;
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}
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static inline s32 in_primary_command_group(u8 command)
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{
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return in_addressed_command_group(command) ||
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in_universal_command_group(command) ||
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in_listen_address_group(command) ||
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in_talk_address_group(command);
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}
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#endif /* _GPIB_CMD_H */
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