1/*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2008 Ed Schouten <ed@FreeBSD.org> 5 * All rights reserved. 6 * 7 * Portions of this software were developed under sponsorship from Snow 8 * B.V., the Netherlands. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 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 39struct cv; 40struct thread; 41struct tty; 42struct uio; 43 44/* Top half routines. */ 45void ttydisc_open(struct tty *tp); 46void ttydisc_close(struct tty *tp); 47size_t ttydisc_bytesavail(struct tty *tp); 48int ttydisc_read(struct tty *tp, struct uio *uio, int ioflag); 49int ttydisc_write(struct tty *tp, struct uio *uio, int ioflag); 50void ttydisc_canonicalize(struct tty *tp); 51void ttydisc_optimize(struct tty *tp); 52 53/* Bottom half routines. */ 54void ttydisc_modem(struct tty *tp, int open); 55#define ttydisc_can_bypass(tp) ((tp)->t_flags & TF_BYPASS) 56int ttydisc_rint(struct tty *tp, char c, int flags); 57size_t ttydisc_rint_simple(struct tty *tp, const void *buf, size_t len); 58size_t ttydisc_rint_bypass(struct tty *tp, const void *buf, size_t len); 59void ttydisc_rint_done(struct tty *tp); 60size_t ttydisc_rint_poll(struct tty *tp); 61size_t ttydisc_getc(struct tty *tp, void *buf, size_t len); 62int ttydisc_getc_uio(struct tty *tp, struct uio *uio); 63size_t ttydisc_getc_poll(struct tty *tp); 64 65/* Error codes for ttydisc_rint(). */ 66#define TRE_FRAMING 0x01 67#define TRE_PARITY 0x02 68#define TRE_OVERRUN 0x04 69#define TRE_BREAK 0x08 70 71static __inline size_t 72ttydisc_read_poll(struct tty *tp) 73{ 74 75 tty_assert_locked(tp); 76 77 return ttyinq_bytescanonicalized(&tp->t_inq); 78} 79 80static __inline size_t 81ttydisc_write_poll(struct tty *tp) 82{ 83 84 tty_assert_locked(tp); 85 86 return ttyoutq_bytesleft(&tp->t_outq); 87} 88 89#endif /* !_SYS_TTYDISC_H_ */ 90