1 /*- 2 * Copyright (c) 2008 Ed Schouten <ed@FreeBSD.org> 3 * All rights reserved. 4 * 5 * Portions of this software were developed under sponsorship from Snow 6 * B.V., the Netherlands. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * $FreeBSD$ 30 */ 31 32 #ifndef _SYS_TTYDISC_H_ 33 #define _SYS_TTYDISC_H_ 34 35 #ifndef _SYS_TTY_H_ 36 #error "can only be included through <sys/tty.h>" 37 #endif /* !_SYS_TTY_H_ */ 38 39 struct cv; 40 struct thread; 41 struct tty; 42 struct uio; 43 44 /* Top half routines. */ 45 void ttydisc_open(struct tty *tp); 46 void ttydisc_close(struct tty *tp); 47 int ttydisc_read(struct tty *tp, struct uio *uio, int ioflag); 48 int ttydisc_write(struct tty *tp, struct uio *uio, int ioflag); 49 void ttydisc_optimize(struct tty *tp); 50 51 /* Bottom half routines. */ 52 void ttydisc_modem(struct tty *tp, int open); 53 #define ttydisc_can_bypass(tp) ((tp)->t_flags & TF_BYPASS) 54 int ttydisc_rint(struct tty *tp, char c, int flags); 55 size_t ttydisc_rint_simple(struct tty *tp, const void *buf, size_t len); 56 size_t ttydisc_rint_bypass(struct tty *tp, const void *buf, size_t len); 57 void ttydisc_rint_done(struct tty *tp); 58 size_t ttydisc_rint_poll(struct tty *tp); 59 size_t ttydisc_getc(struct tty *tp, void *buf, size_t len); 60 int ttydisc_getc_uio(struct tty *tp, struct uio *uio); 61 size_t ttydisc_getc_poll(struct tty *tp); 62 63 /* Error codes for ttydisc_rint(). */ 64 #define TRE_FRAMING 0x01 65 #define TRE_PARITY 0x02 66 #define TRE_OVERRUN 0x04 67 #define TRE_BREAK 0x08 68 69 static __inline size_t 70 ttydisc_read_poll(struct tty *tp) 71 { 72 73 tty_lock_assert(tp, MA_OWNED); 74 75 return ttyinq_bytescanonicalized(&tp->t_inq); 76 } 77 78 static __inline size_t 79 ttydisc_write_poll(struct tty *tp) 80 { 81 82 tty_lock_assert(tp, MA_OWNED); 83 84 return ttyoutq_bytesleft(&tp->t_outq); 85 } 86 87 #endif /* !_SYS_TTYDISC_H_ */ 88