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Diffstat (limited to 'device/tty.h')
| -rw-r--r-- | device/tty.h | 203 |
1 files changed, 203 insertions, 0 deletions
diff --git a/device/tty.h b/device/tty.h new file mode 100644 index 0000000..9422996 --- /dev/null +++ b/device/tty.h @@ -0,0 +1,203 @@ +/* + * 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> + +#ifdef luna88k +#include <luna88k/jtermio.h> +#endif + +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 */ + int (*t_start)(struct tty *); + /* routine to start output */ +#define t_oproc t_start + int (*t_stop)(struct tty *, int); + /* routine to stop output */ + int (*t_mctl)(struct tty *, int, int); + /* (optional) routine to control + modem signals */ + char t_ispeed; /* input speed */ + 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. + */ + int (*t_getstat)(); /* routine to get status */ + int (*t_setstat)(); /* 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 boolean_t ttymodem( + struct tty * tp, + boolean_t carrier_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] + +/* 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 recived 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_ */ |