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comvar.h revision 1.17 
      1 /*	$NetBSD: comvar.h,v 1.17 1997/10/19 11:45:45 explorer 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 #include "rnd.h"
     34 #if NRND > 0 && defined(RND_COM)
     35 #include <sys/rnd.h>
     36 #endif
     37 
     38 int comcnattach __P((bus_space_tag_t, int, int, int, tcflag_t));
     39 
     40 #ifdef KGDB
     41 int com_kgdb_attach __P((bus_space_tag_t, int, int, int, tcflag_t));
     42 #endif
     43 
     44 int com_is_console __P((bus_space_tag_t, int, bus_space_handle_t *));
     45 
     46 /* Hardware flag masks */
     47 #define	COM_HW_NOIEN	0x01
     48 #define	COM_HW_FIFO	0x02
     49 #define	COM_HW_HAYESP	0x04
     50 #define	COM_HW_CONSOLE	0x40
     51 #define	COM_HW_KGDB	0x80
     52 
     53 /* Buffer size for character buffer */
     54 #define RXBUFSIZE 2048			/* More than enough.. */
     55 #define RXBUFMASK (RXBUFSIZE - 1)	/* Only iff previous is a power of 2 */
     56 #define RXHIWAT   ((RXBUFSIZE * 1) / 4)
     57 #define	RXLOWAT	  ((RXBUFSIZE * 3) / 4)
     58 
     59 struct com_softc {
     60 	struct device sc_dev;
     61 	void *sc_si;
     62 	struct tty *sc_tty;
     63 
     64 	int sc_overflows;
     65 	int sc_floods;
     66 	int sc_errors;
     67 
     68 	int sc_iobase;			/* XXX ISA-centric name */
     69 	int sc_frequency;
     70 
     71 	bus_space_tag_t sc_iot;
     72 	bus_space_handle_t sc_ioh;
     73 	bus_space_handle_t sc_hayespioh;
     74 
     75 	u_char sc_hwflags;
     76 	u_char sc_swflags;
     77 	int sc_fifolen;
     78 
     79 	u_char sc_msr, sc_msr_delta, sc_msr_mask, sc_mcr, sc_mcr_active, sc_lcr,
     80 	       sc_ier, sc_fifo, sc_dlbl, sc_dlbh;
     81 	u_char sc_mcr_dtr, sc_mcr_rts, sc_msr_cts, sc_msr_dcd;
     82 
     83 	int sc_r_hiwat;
     84 	int sc_r_lowat;
     85  	volatile u_int sc_rbget;
     86  	volatile u_int sc_rbput;
     87 	volatile u_int sc_rbavail;
     88  	u_char sc_rbuf[RXBUFSIZE];
     89 	u_char sc_lbuf[RXBUFSIZE];
     90 
     91  	u_char *sc_tba;
     92  	int sc_tbc,
     93 	    sc_heldtbc;
     94 
     95 	volatile u_char sc_rx_flags,
     96 #define	RX_TTY_BLOCKED		0x01
     97 #define	RX_TTY_OVERFLOWED	0x02
     98 #define	RX_IBUF_BLOCKED		0x04
     99 #define	RX_IBUF_OVERFLOWED	0x08
    100 #define	RX_ANY_BLOCK		0x0f
    101 			sc_tx_busy,
    102 			sc_tx_done,
    103 			sc_tx_stopped,
    104 			sc_st_check,
    105 			sc_rx_ready;
    106 
    107 	volatile u_char sc_heldchange;
    108 #if NRND > 0 && defined(RND_COM)
    109 	rndsource_element_t  rnd_source;
    110 #endif
    111 };
    112 
    113 /* Macros to clear/set/test flags. */
    114 #define SET(t, f)	(t) |= (f)
    115 #define CLR(t, f)	(t) &= ~(f)
    116 #define ISSET(t, f)	((t) & (f))
    117 
    118 int comprobe1 __P((bus_space_tag_t, bus_space_handle_t, int));
    119 int comintr __P((void *));
    120 void com_attach_subr __P((struct com_softc *));
    121 int cominit __P((bus_space_tag_t, int, int, int, tcflag_t,
    122 	bus_space_handle_t *));
    123 
    124 #ifndef __GENERIC_SOFT_INTERRUPTS
    125 #ifdef alpha
    126 #define	IPL_SERIAL	IPL_TTY
    127 #define	splserial()	spltty()
    128 #define	IPL_SOFTSERIAL	IPL_TTY
    129 #define	splsoftserial()	spltty()
    130 #endif
    131 #endif
    132