1 /* $NetBSD: comvar.h,v 1.16 1997/10/15 22:00:17 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 1996 Christopher G. Demetriou. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. All advertising materials mentioning features or use of this software 15 * must display the following acknowledgement: 16 * This product includes software developed by Christopher G. Demetriou 17 * for the NetBSD Project. 18 * 4. The name of the author may not be used to endorse or promote products 19 * derived from this software without specific prior written permission 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 int comcnattach __P((bus_space_tag_t, int, int, int, tcflag_t)); 34 35 #ifdef KGDB 36 int com_kgdb_attach __P((bus_space_tag_t, int, int, int, tcflag_t)); 37 #endif 38 39 int com_is_console __P((bus_space_tag_t, int, bus_space_handle_t *)); 40 41 /* Hardware flag masks */ 42 #define COM_HW_NOIEN 0x01 43 #define COM_HW_FIFO 0x02 44 #define COM_HW_HAYESP 0x04 45 #define COM_HW_CONSOLE 0x40 46 #define COM_HW_KGDB 0x80 47 48 /* Buffer size for character buffer */ 49 #define RXBUFSIZE 2048 /* More than enough.. */ 50 #define RXBUFMASK (RXBUFSIZE - 1) /* Only iff previous is a power of 2 */ 51 #define RXHIWAT ((RXBUFSIZE * 1) / 4) 52 #define RXLOWAT ((RXBUFSIZE * 3) / 4) 53 54 struct com_softc { 55 struct device sc_dev; 56 void *sc_si; 57 struct tty *sc_tty; 58 59 int sc_overflows; 60 int sc_floods; 61 int sc_errors; 62 63 int sc_iobase; /* XXX ISA-centric name */ 64 int sc_frequency; 65 66 bus_space_tag_t sc_iot; 67 bus_space_handle_t sc_ioh; 68 bus_space_handle_t sc_hayespioh; 69 70 u_char sc_hwflags; 71 u_char sc_swflags; 72 int sc_fifolen; 73 74 u_char sc_msr, sc_msr_delta, sc_msr_mask, sc_mcr, sc_mcr_active, sc_lcr, 75 sc_ier, sc_fifo, sc_dlbl, sc_dlbh; 76 u_char sc_mcr_dtr, sc_mcr_rts, sc_msr_cts, sc_msr_dcd; 77 78 int sc_r_hiwat; 79 int sc_r_lowat; 80 volatile u_int sc_rbget; 81 volatile u_int sc_rbput; 82 volatile u_int sc_rbavail; 83 u_char sc_rbuf[RXBUFSIZE]; 84 u_char sc_lbuf[RXBUFSIZE]; 85 86 u_char *sc_tba; 87 int sc_tbc, 88 sc_heldtbc; 89 90 volatile u_char sc_rx_flags, 91 #define RX_TTY_BLOCKED 0x01 92 #define RX_TTY_OVERFLOWED 0x02 93 #define RX_IBUF_BLOCKED 0x04 94 #define RX_IBUF_OVERFLOWED 0x08 95 #define RX_ANY_BLOCK 0x0f 96 sc_tx_busy, 97 sc_tx_done, 98 sc_tx_stopped, 99 sc_st_check, 100 sc_rx_ready; 101 102 volatile u_char sc_heldchange; 103 }; 104 105 /* Macros to clear/set/test flags. */ 106 #define SET(t, f) (t) |= (f) 107 #define CLR(t, f) (t) &= ~(f) 108 #define ISSET(t, f) ((t) & (f)) 109 110 int comprobe1 __P((bus_space_tag_t, bus_space_handle_t, int)); 111 int comintr __P((void *)); 112 void com_attach_subr __P((struct com_softc *)); 113 int cominit __P((bus_space_tag_t, int, int, int, tcflag_t, 114 bus_space_handle_t *)); 115 116 #ifndef __GENERIC_SOFT_INTERRUPTS 117 #ifdef alpha 118 #define IPL_SERIAL IPL_TTY 119 #define splserial() spltty() 120 #define IPL_SOFTSERIAL IPL_TTY 121 #define splsoftserial() spltty() 122 #endif 123 #endif 124