xref: /openbmc/linux/arch/m68k/include/asm/adb_iop.h (revision 799a545b)
1 /*
2  * ADB through the IOP
3  * Written by Joshua M. Thompson
4  */
5 
6 /* IOP number and channel number for ADB */
7 
8 #define ADB_IOP		IOP_NUM_ISM
9 #define ADB_CHAN	2
10 
11 /* From the A/UX headers...maybe important, maybe not */
12 
13 #define ADB_IOP_LISTEN	0x01
14 #define ADB_IOP_TALK	0x02
15 #define ADB_IOP_EXISTS	0x04
16 #define ADB_IOP_FLUSH	0x08
17 #define ADB_IOP_RESET	0x10
18 #define ADB_IOP_INT	0x20
19 #define ADB_IOP_POLL	0x40
20 #define ADB_IOP_UNINT	0x80
21 
22 #define AIF_RESET	0x00
23 #define AIF_FLUSH	0x01
24 #define AIF_LISTEN	0x08
25 #define AIF_TALK	0x0C
26 
27 /* Flag bits in struct adb_iopmsg */
28 
29 #define ADB_IOP_EXPLICIT	0x80	/* nonzero if explicit command */
30 #define ADB_IOP_AUTOPOLL	0x40	/* auto/SRQ polling enabled    */
31 #define ADB_IOP_SRQ		0x04	/* SRQ detected                */
32 #define ADB_IOP_TIMEOUT		0x02	/* nonzero if timeout          */
33 
34 #ifndef __ASSEMBLY__
35 
36 struct adb_iopmsg {
37 	__u8 flags;		/* ADB flags         */
38 	__u8 count;		/* no. of data bytes */
39 	__u8 cmd;		/* ADB command       */
40 	__u8 data[8];		/* ADB data          */
41 	__u8 spare[21];		/* spare             */
42 };
43 
44 #endif /* __ASSEMBLY__ */
45