1999/0715/pc/io.h (diff list | history)

1999/0713/sys/src/9/pc/io.h:219,233 – 1999/0715/sys/src/9/pc/io.h:219,246 (short | long | prev | next)
Add SMBus transaction enum and generic function. Add locking. rsc Fri Mar 4 12:44:25 2005
1998/0910		Scsiio (*reset)(int, ISAConf*); } SCSIdev;
1999/0713
1999/0715		/* SMBus transactions */ enum { SMBquick, /* sends address only */ /* write */ SMBsend, /* sends address and cmd */ SMBbytewrite, /* sends address and cmd and 1 byte */ SMBwordwrite, /* sends address and cmd and 2 bytes */ /* read */ SMBrecv, /* sends address, recvs 1 byte */ SMBbyteread, /* sends address and cmd, recv's byte */ SMBwordread, /* sends address and cmd, recv's 2 bytes */ };
1999/0713		typedef struct SMBus SMBus; struct SMBus { void *arg; ulong addr; int (*quick)(SMBus*, int); int (*send)(SMBus*, int, int); int (*recv)(SMBus*, int, int*); int (*bytewrite)(SMBus*, int); int (*byteread)(SMBus*, int, int*); int (*wordwrite)(SMBus*, int); int (*wordread)(SMBus*, int, int*);
1999/0715		QLock; /* mutex */ Rendez r; /* rendezvous point for completion interrupts */ void *arg; /* implementation dependent */ ulong base; /* port or memory base of smbus */ int busy; void (*transact)(SMBus*, int, int, int, uchar*);
1999/0713		};