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/**
* @file rtems/termiostypes.h
*/
/*
* RTEMS termios device support internal data structures
*
* COPYRIGHT (c) 1989-2008.
* On-Line Applications Research Corporation (OAR).
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.com/license/LICENSE.
*
* $Id$
*/
#ifndef __TERMIOSTYPES_H
#define __TERMIOSTYPES_H
#include <rtems.h>
#include <rtems/libio.h>
#ifdef __cplusplus
extern "C" {
#endif
/*
* Wakeup callback data structure
*/
struct ttywakeup {
void (*sw_pfn)(struct termios *tty, void *arg);
void *sw_arg;
};
/*
* Variables associated with the character buffer
*/
struct rtems_termios_rawbuf {
char *theBuf;
volatile unsigned int Head;
volatile unsigned int Tail;
volatile unsigned int Size;
rtems_id Semaphore;
};
/*
* Variables associated with each termios instance.
* One structure for each hardware I/O device.
*/
struct rtems_termios_tty {
/*
* Linked-list of active TERMIOS devices
*/
struct rtems_termios_tty *forw;
struct rtems_termios_tty *back;
/*
* How many times has this device been opened
*/
int refcount;
/*
* This device
*/
rtems_device_major_number major;
rtems_device_minor_number minor;
/*
* Mutual-exclusion semaphores
*/
rtems_id isem;
rtems_id osem;
/*
* The canonical (cooked) character buffer
*/
char *cbuf;
int ccount;
int cindex;
/*
* Keep track of cursor (printhead) position
*/
int column;
int read_start_column;
/*
* The ioctl settings
*/
struct termios termios;
rtems_interval vtimeTicks;
/*
* Raw input character buffer
*/
struct rtems_termios_rawbuf rawInBuf;
uint32_t rawInBufSemaphoreOptions;
rtems_interval rawInBufSemaphoreTimeout;
rtems_interval rawInBufSemaphoreFirstTimeout;
unsigned int rawInBufDropped; /* Statistics */
/*
* Raw output character buffer
*/
struct rtems_termios_rawbuf rawOutBuf;
int t_dqlen; /* count of characters dequeued from device */
enum {rob_idle, rob_busy, rob_wait } rawOutBufState;
/*
* Callbacks to device-specific routines
*/
rtems_termios_callbacks device;
volatile unsigned int flow_ctrl;
unsigned int lowwater,highwater;
/*
* I/O task IDs (for task-driven drivers)
*/
rtems_id rxTaskId;
rtems_id txTaskId;
/*
* line discipline related stuff
*/
int t_line; /* id of line discipline */
void *t_sc; /* hook for discipline-specific data structure */
/*
* Wakeup callback variables
*/
struct ttywakeup tty_snd;
struct ttywakeup tty_rcv;
int tty_rcvwakeup;
};
struct rtems_termios_linesw {
int (*l_open) (struct rtems_termios_tty *tp);
int (*l_close)(struct rtems_termios_tty *tp);
int (*l_read )(struct rtems_termios_tty *tp,rtems_libio_rw_args_t *args);
int (*l_write)(struct rtems_termios_tty *tp,rtems_libio_rw_args_t *args);
int (*l_rint )(int c,struct rtems_termios_tty *tp);
int (*l_start)(struct rtems_termios_tty *tp);
int (*l_ioctl)(struct rtems_termios_tty *tp,rtems_libio_ioctl_args_t *args);
int (*l_modem)(struct rtems_termios_tty *tp,int flags);
};
/*
* FIXME: this should move to libio.h!
* values for rtems_termios_callbacks.outputUsesInterrupts
*/
#define TERMIOS_POLLED 0
#define TERMIOS_IRQ_DRIVEN 1
#define TERMIOS_TASK_DRIVEN 2
/*
* FIXME: this should move to termios.h!
*/
void rtems_termios_rxirq_occured(struct rtems_termios_tty *tty);
/*
* FIXME: this should move to termios.h!
* put a string to output ring buffer
*/
void rtems_termios_puts (
const void *buf,
int len,
struct rtems_termios_tty *tty
);
/*
* global hooks for line disciplines
*/
extern struct rtems_termios_linesw rtems_termios_linesw[];
extern int rtems_termios_nlinesw;
#define TTYDISC 0 /* termios tty line discipline */
#define TABLDISC 3 /* tablet discipline */
#define SLIPDISC 4 /* serial IP discipline */
#define PPPDISC 5 /* PPP discipline */
#define MAXLDISC 8
/* convert xxx integer to equivalent Bxxx constant */
int termios_number_to_baud(int baud);
/* convert Bxxx constant to xxx integer */
int termios_baud_to_number(int termios_baud);
/* convert Bxxx constant to index */
int termios_baud_to_index(int termios_baud);
/*
* This method is used by a driver to tell termios its
* initial baud rate. This is especially important when
* the device driver does not set the baud to the default
* of B9600.
*/
int rtems_termios_set_initial_baud(
struct rtems_termios_tty *ttyp,
int baud
);
#ifdef __cplusplus
}
#endif
#endif /* TERMIOSTYPES_H */
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