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comvar.h revision 1.15 
      1 /*	$NetBSD: comvar.h,v 1.15 1997/09/16 20:34:29 is 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_ih;
     57 	void *sc_si;
     58 	struct tty *sc_tty;
     59 
     60 	int sc_overflows;
     61 	int sc_floods;
     62 	int sc_errors;
     63 
     64 	int sc_iobase;
     65 	int sc_frequency;
     66 
     67 	bus_space_tag_t sc_iot;
     68 	bus_space_handle_t sc_ioh;
     69 	bus_space_handle_t sc_hayespioh;
     70 
     71 	u_char sc_hwflags;
     72 	u_char sc_swflags;
     73 	int sc_fifolen;
     74 
     75 	u_char sc_msr, sc_msr_delta, sc_msr_mask, sc_mcr, sc_mcr_active, sc_lcr,
     76 	       sc_ier, sc_fifo, sc_dlbl, sc_dlbh;
     77 	u_char sc_mcr_dtr, sc_mcr_rts, sc_msr_cts, sc_msr_dcd;
     78 
     79 	int sc_r_hiwat;
     80 	int sc_r_lowat;
     81  	volatile u_int sc_rbget;
     82  	volatile u_int sc_rbput;
     83 	volatile u_int sc_rbavail;
     84  	u_char sc_rbuf[RXBUFSIZE];
     85 	u_char sc_lbuf[RXBUFSIZE];
     86 
     87  	u_char *sc_tba;
     88  	int sc_tbc,
     89 	    sc_heldtbc;
     90 
     91 	volatile u_char sc_rx_flags,
     92 #define	RX_TTY_BLOCKED		0x01
     93 #define	RX_TTY_OVERFLOWED	0x02
     94 #define	RX_IBUF_BLOCKED		0x04
     95 #define	RX_IBUF_OVERFLOWED	0x08
     96 #define	RX_ANY_BLOCK		0x0f
     97 			sc_tx_busy,
     98 			sc_tx_done,
     99 			sc_tx_stopped,
    100 			sc_st_check,
    101 			sc_rx_ready;
    102 
    103 	volatile u_char sc_heldchange;
    104 };
    105 
    106 /* Macros to clear/set/test flags. */
    107 #define SET(t, f)	(t) |= (f)
    108 #define CLR(t, f)	(t) &= ~(f)
    109 #define ISSET(t, f)	((t) & (f))
    110 
    111 int comprobe1 __P((bus_space_tag_t, bus_space_handle_t, int));
    112 int comintr __P((void *));
    113 void com_attach_subr __P((struct com_softc *));
    114 int cominit __P((bus_space_tag_t, int, int, int, tcflag_t,
    115 	bus_space_handle_t *));
    116 
    117 #ifndef __GENERIC_SOFT_INTERRUPTS
    118 #ifdef alpha
    119 #define	IPL_SERIAL	IPL_TTY
    120 #define	splserial()	spltty()
    121 #define	IPL_SOFTSERIAL	IPL_TTY
    122 #define	splsoftserial()	spltty()
    123 #endif
    124 #endif
    125