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Annotation of sys/dev/ic/z8530sc.h, Revision 1.1

1.1     ! nbrk        1: /*     $OpenBSD: z8530sc.h,v 1.10 2003/06/02 23:28:02 millert Exp $    */
        !             2: /*     $NetBSD: z8530sc.h,v 1.4 1996/10/16 20:34:54 gwr Exp $  */
        !             3:
        !             4: /*
        !             5:  * Copyright (c) 1994 Gordon W. Ross
        !             6:  * Copyright (c) 1992, 1993
        !             7:  *     The Regents of the University of California.  All rights reserved.
        !             8:  *
        !             9:  * This software was developed by the Computer Systems Engineering group
        !            10:  * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
        !            11:  * contributed to Berkeley.
        !            12:  *
        !            13:  * All advertising materials mentioning features or use of this software
        !            14:  * must display the following acknowledgement:
        !            15:  *     This product includes software developed by the University of
        !            16:  *     California, Lawrence Berkeley Laboratory.
        !            17:  *
        !            18:  * Redistribution and use in source and binary forms, with or without
        !            19:  * modification, are permitted provided that the following conditions
        !            20:  * are met:
        !            21:  * 1. Redistributions of source code must retain the above copyright
        !            22:  *    notice, this list of conditions and the following disclaimer.
        !            23:  * 2. Redistributions in binary form must reproduce the above copyright
        !            24:  *    notice, this list of conditions and the following disclaimer in the
        !            25:  *    documentation and/or other materials provided with the distribution.
        !            26:  * 3. Neither the name of the University nor the names of its contributors
        !            27:  *    may be used to endorse or promote products derived from this software
        !            28:  *    without specific prior written permission.
        !            29:  *
        !            30:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
        !            31:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        !            32:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            33:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
        !            34:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            35:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            36:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            37:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            38:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            39:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            40:  * SUCH DAMAGE.
        !            41:  *
        !            42:  *     @(#)zsvar.h     8.1 (Berkeley) 6/11/93
        !            43:  */
        !            44:
        !            45:
        !            46: /*
        !            47:  * Software state, per zs channel.
        !            48:  */
        !            49: struct zs_chanstate {
        !            50:
        !            51:        /* Pointers to the device registers. */
        !            52:        volatile u_char *cs_reg_csr;    /* ctrl, status, and reg. number. */
        !            53:        volatile u_char *cs_reg_data;   /* data or numbered register */
        !            54:
        !            55:        int     cs_channel;             /* sub-unit number */
        !            56:        void   *cs_private;             /* sub-driver data pointer */
        !            57:        struct zsops *cs_ops;
        !            58:
        !            59:        int     cs_brg_clk;             /* BAUD Rate Generator clock
        !            60:                                         * (usually PCLK / 16) */
        !            61:        int     cs_defspeed;            /* default baud rate (from PROM) */
        !            62:
        !            63:        /*
        !            64:         * We must keep a copy of the write registers as they are
        !            65:         * mostly write-only and we sometimes need to set and clear
        !            66:         * individual bits (e.g., in WR3).  Not all of these are
        !            67:         * needed but 16 bytes is cheap and this makes the addressing
        !            68:         * simpler.  Unfortunately, we can only write to some registers
        !            69:         * when the chip is not actually transmitting, so whenever
        !            70:         * we are expecting a `transmit done' interrupt the preg array
        !            71:         * is allowed to `get ahead' of the current values.  In a
        !            72:         * few places we must change the current value of a register,
        !            73:         * rather than (or in addition to) the pending value; for these
        !            74:         * cs_creg[] contains the current value.
        !            75:         */
        !            76:        u_char  cs_creg[16];            /* current values */
        !            77:        u_char  cs_preg[16];            /* pending values */
        !            78:
        !            79:        u_char  cs_heldchange;          /* change pending (creg != preg) */
        !            80:        u_char  cs_rr0;                 /* last rr0 processed */
        !            81:        u_char  cs_rr0_delta;           /* rr0 changes at status intr. */
        !            82:
        !            83:        char    cs_softreq;             /* need soft interrupt call */
        !            84: };
        !            85:
        !            86: /*
        !            87:  * Function vector - per channel
        !            88:  */
        !            89: struct zsops {
        !            90:        /* receive char available */
        !            91:        void    (*zsop_rxint)(register struct zs_chanstate *);
        !            92:
        !            93:        /* external/status */
        !            94:        void    (*zsop_stint)(register struct zs_chanstate *);
        !            95:
        !            96:        /* xmit buffer empty */
        !            97:        void    (*zsop_txint)(register struct zs_chanstate *);
        !            98:
        !            99:        /* process software interrupt */
        !           100:        void    (*zsop_softint)(struct zs_chanstate *);
        !           101: };
        !           102:
        !           103: extern struct zsops zsops_null;
        !           104:
        !           105: struct zsc_attach_args {
        !           106:        int channel;    /* two serial channels per zsc */
        !           107:        int hwflags;
        !           108: };
        !           109: #define ZS_HWFLAG_CONSOLE 1
        !           110:
        !           111: int  zsc_intr_hard(void *);
        !           112: int  zsc_intr_soft(void *);
        !           113: void zs_break(struct zs_chanstate *, int);
        !           114: int  zs_getspeed(struct zs_chanstate *);
        !           115: void zs_iflush(struct zs_chanstate *);
        !           116: void zs_loadchannelregs(struct zs_chanstate *);