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/*
* Mach Operating System
* Copyright (c) 1993-1990 Carnegie Mellon University
* All Rights Reserved.
*
* Permission to use, copy, modify and distribute this software and its
* documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie Mellon
* the rights to redistribute these changes.
*/
/*
* Author: David B. Golub, Carnegie Mellon University
* Date: 7/90
*
* Compatibility TTY structure for existing TTY device drivers.
*/
#ifndef _DEVICE_TTY_H_
#define _DEVICE_TTY_H_
#include <kern/lock.h>
#include <kern/queue.h>
#include <mach/port.h>
#include <device/device_types.h>
#include <device/tty_status.h>
#include <device/cirbuf.h>
#include <device/io_req.h>
struct tty {
decl_simple_lock_data(,t_lock)
struct cirbuf t_inq; /* input buffer */
struct cirbuf t_outq; /* output buffer */
char * t_addr; /* device pointer */
int t_dev; /* device number */
void (*t_start)(struct tty *);
/* routine to start output */
#define t_oproc t_start
void (*t_stop)(struct tty *, int);
/* routine to stop output */
int (*t_mctl)(struct tty *, int, int);
/* (optional) routine to control
modem signals */
unsigned char t_ispeed; /* input speed */
unsigned char t_ospeed; /* output speed */
char t_breakc; /* character to deliver when 'break'
condition received */
int t_flags; /* mode flags */
int t_state; /* current state */
int t_line; /* fake line discipline number,
for old drivers - always 0 */
queue_head_t t_delayed_read; /* pending read requests */
queue_head_t t_delayed_write;/* pending write requests */
queue_head_t t_delayed_open; /* pending open requests */
/*
* Items beyond this point should be removed to device-specific
* extension structures.
*/
io_return_t (*t_getstat)(dev_t, int, int *, natural_t *); /* routine to get status */
io_return_t (*t_setstat)(dev_t, int, int *, natural_t); /* routine to set status */
dev_ops_t t_tops; /* another device to possibly
push through */
};
typedef struct tty *tty_t;
/*
* Common TTY service routines
*/
extern io_return_t char_open(
int dev,
struct tty * tp,
dev_mode_t mode,
io_req_t ior);
extern io_return_t char_read(
struct tty * tp,
io_req_t ior);
extern io_return_t char_write(
struct tty * tp,
io_req_t ior);
extern void ttyinput(
unsigned int c,
struct tty * tp);
extern void ttyinput_many(
struct tty * tp,
char * chars,
int count);
extern boolean_t ttymodem(
struct tty * tp,
boolean_t carrier_up);
extern void tty_cts(
struct tty * tp,
boolean_t cts_up);
extern void tty_queue_completion(
queue_t queue);
#define tt_open_wakeup(tp) \
(tty_queue_completion(&(tp)->t_delayed_open))
#define tt_write_wakeup(tp) \
(tty_queue_completion(&(tp)->t_delayed_write))
extern void ttychars(
struct tty * tp);
#define TTMINBUF 90
short tthiwat[NSPEEDS], ttlowat[NSPEEDS];
#define TTHIWAT(tp) tthiwat[(tp)->t_ospeed]
#define TTLOWAT(tp) ttlowat[(tp)->t_ospeed]
extern io_return_t tty_get_status(
struct tty * tp,
dev_flavor_t flavor,
int * data,
natural_t * count);
extern io_return_t tty_set_status(
struct tty * tp,
dev_flavor_t flavor,
int * data,
natural_t count);
extern void tty_flush(
struct tty * tp,
int rw);
extern void ttrstrt(
struct tty * tp);
extern void ttstart(
struct tty * tp);
extern void ttyclose(
struct tty * tp);
extern boolean_t tty_portdeath(
struct tty * tp,
ipc_port_t port);
/* internal state bits */
#define TS_INIT 0x00000001 /* tty structure initialized */
#define TS_TIMEOUT 0x00000002 /* delay timeout in progress */
#define TS_WOPEN 0x00000004 /* waiting for open to complete */
#define TS_ISOPEN 0x00000008 /* device is open */
#define TS_FLUSH 0x00000010 /* outq has been flushed during DMA */
#define TS_CARR_ON 0x00000020 /* software copy of carrier-present */
#define TS_BUSY 0x00000040 /* output in progress */
#define TS_ASLEEP 0x00000080 /* wakeup when output done */
#define TS_TTSTOP 0x00000100 /* output stopped by ctl-s */
#define TS_HUPCLS 0x00000200 /* hang up upon last close */
#define TS_TBLOCK 0x00000400 /* tandem queue blocked */
#define TS_NBIO 0x00001000 /* tty in non-blocking mode */
#define TS_ONDELAY 0x00002000 /* device is open; software copy of
* carrier is not present */
#define TS_MIN 0x00004000 /* buffer input chars, if possible */
#define TS_MIN_TO 0x00008000 /* timeout for the above is active */
#define TS_OUT 0x00010000 /* tty in use for dialout only */
#define TS_RTS_DOWN 0x00020000 /* modem pls stop */
#define TS_TRANSLATE 0x00100000 /* translation device enabled */
#define TS_KDB 0x00200000 /* should enter kdb on ALT */
#define TS_MIN_TO_RCV 0x00400000 /* character received during
receive timeout interval */
/* flags - old names defined in terms of new ones */
#define TANDEM TF_TANDEM
#define ODDP TF_ODDP
#define EVENP TF_EVENP
#define ANYP (ODDP|EVENP)
#define MDMBUF TF_MDMBUF
#define LITOUT TF_LITOUT
#define NOHANG TF_NOHANG
#define ECHO TF_ECHO
#define CRMOD TF_CRMOD
#define XTABS TF_XTABS
/* these are here only to let old code compile - they are never set */
#define RAW LITOUT
#define PASS8 LITOUT
/*
* Hardware bits.
* SHOULD NOT BE HERE.
*/
#define DONE 0200
#define IENABLE 0100
/*
* Modem control commands.
*/
#define DMSET 0
#define DMBIS 1
#define DMBIC 2
#define DMGET 3
/*
* Fake 'line discipline' switch, for the benefit of old code
* that wants to call through it.
*/
struct ldisc_switch {
int (*l_read) (struct tty *, io_req_t); /* read */
int (*l_write)(struct tty *, io_req_t); /* write */
void (*l_rint) (unsigned int, struct tty *); /* character input */
boolean_t (*l_modem)(struct tty *, boolean_t); /* modem change */
void (*l_start)(struct tty *); /* start output */
};
extern struct ldisc_switch linesw[];
#endif /* _DEVICE_TTY_H_ */
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