ref: 09d11c64e5014a64dbc7b807899b3dd2581fe26f
dir: /os/port/uart.h/
typedef struct PhysUart PhysUart; typedef struct Uart Uart; /* * routines to access UART hardware */ struct PhysUart { char* name; Uart* (*pnp)(void); void (*enable)(Uart*, int); void (*disable)(Uart*); void (*kick)(Uart*); void (*dobreak)(Uart*, int); int (*baud)(Uart*, int); int (*bits)(Uart*, int); int (*stop)(Uart*, int); int (*parity)(Uart*, int); void (*modemctl)(Uart*, int); void (*rts)(Uart*, int); void (*dtr)(Uart*, int); long (*status)(Uart*, void*, long, long); void (*fifo)(Uart*, int); void (*power)(Uart*, int); int (*getc)(Uart*); /* polling versions, for iprint, rdb */ void (*putc)(Uart*, int); }; enum { Stagesize= 1024 }; /* * software UART */ struct Uart { void* regs; /* hardware stuff */ void* saveregs; /* place to put registers on power down */ char* name; /* internal name */ ulong freq; /* clock frequency */ int bits; /* bits per character */ int stop; /* stop bits */ int parity; /* even, odd or no parity */ int baud; /* baud rate */ PhysUart*phys; int console; /* used as a serial console */ int special; /* internal kernel device */ Uart* next; /* list of allocated uarts */ QLock; int type; /* ?? */ int dev; int opens; int enabled; Uart *elist; /* next enabled interface */ int perr; /* parity errors */ int ferr; /* framing errors */ int oerr; /* rcvr overruns */ int berr; /* no input buffers */ int serr; /* input queue overflow */ /* buffers */ int (*putc)(Queue*, int); Queue *iq; Queue *oq; Lock rlock; uchar istage[Stagesize]; uchar *iw; uchar *ir; uchar *ie; Lock tlock; /* transmit */ uchar ostage[Stagesize]; uchar *op; uchar *oe; int drain; int modem; /* hardware flow control on */ int xonoff; /* software flow control on */ int blocked; int cts, dsr, dcd, dcdts; /* keep track of modem status */ int ctsbackoff; int hup_dsr, hup_dcd; /* send hangup upstream? */ int dohup; Rendez r; }; extern Uart* consuart; extern int uartctl(Uart*, char*); extern int uartgetc(void); extern void uartkick(void*); extern void uartmouse(Uart*, int (*)(Queue*, int), int); extern void uartsetmouseputc(Uart*, int (*)(Queue*, int)); extern void uartputc(int); extern void uartputs(char*, int); extern void uartrecv(Uart*, char); extern Uart* uartsetup(Uart*); extern int uartstageoutput(Uart*);