FreeBSD/Linux Kernel Cross Reference
sys/dev/ic/z8530sc.h

     /*      $OpenBSD: z8530sc.h,v 1.12 2017/04/30 13:04:49 mpi Exp $        */
     /*      $NetBSD: z8530sc.h,v 1.15 2001/05/11 01:40:48 thorpej Exp $     */
     
     /*
      * Copyright (c) 1994 Gordon W. Ross
      * Copyright (c) 1992, 1993
      *      The Regents of the University of California.  All rights reserved.
      *
      * This software was developed by the Computer Systems Engineering group
     * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
     * contributed to Berkeley.
     *
     * All advertising materials mentioning features or use of this software
     * must display the following acknowledgement:
     *      This product includes software developed by the University of
     *      California, Lawrence Berkeley Laboratory.
     *
     * Redistribution and use in source and binary forms, with or without
     * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. Neither the name of the University nor the names of its contributors
     *    may be used to endorse or promote products derived from this software
     *    without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     *      @(#)zsvar.h     8.1 (Berkeley) 6/11/93
     */
    
    
    /*
     * Function vector - per channel
     */
    struct zs_chanstate;
    struct zsops {
            void    (*zsop_rxint)(struct zs_chanstate *);
                                            /* receive char available */
            void    (*zsop_stint)(struct zs_chanstate *, int);
                                            /* external/status */
            void    (*zsop_txint)(struct zs_chanstate *);
                                            /* xmit buffer empty */
            void    (*zsop_softint)(struct zs_chanstate *);
                                            /* process software interrupt */
    };
    
    extern struct zsops zsops_null;
    
    
    /*
     * Software state, per zs channel.
     */
    struct zs_chanstate {
    
            /* Pointers to the device registers. */
            volatile uint8_t *cs_reg_csr;   /* ctrl, status, and reg. number. */
            volatile uint8_t *cs_reg_data;  /* data or numbered register */
    
            int     cs_channel;             /* sub-unit number */
            void   *cs_private;             /* sub-driver data pointer */
            struct zsops *cs_ops;
    
            int     cs_brg_clk;             /* BAUD Rate Generator clock
                                             * (usually PCLK / 16) */
            int     cs_defspeed;            /* default baud rate */
            int     cs_defcflag;            /* default cflag */
    
            /*
             * We must keep a copy of the write registers as they are
             * mostly write-only and we sometimes need to set and clear
             * individual bits (e.g., in WR3).  Not all of these are
             * needed but 16 bytes is cheap and this makes the addressing
             * simpler.  Unfortunately, we can only write to some registers
             * when the chip is not actually transmitting, so whenever
             * we are expecting a `transmit done' interrupt the preg array
             * is allowed to `get ahead' of the current values.  In a
             * few places we must change the current value of a register,
             * rather than (or in addition to) the pending value; for these
             * cs_creg[] contains the current value.
             */
            uint8_t cs_creg[17];            /* current values */
            uint8_t cs_preg[17];            /* pending values */
            int     cs_heldchange;          /* change pending (creg != preg) */
    
            uint8_t cs_rr0;                 /* last rr0 processed */
           uint8_t cs_rr0_delta;           /* rr0 changes at status intr. */
           uint8_t cs_rr0_mask;            /* rr0 bits that stop output */
           uint8_t cs_rr0_dcd;             /* which bit to read as DCD */
           uint8_t cs_rr0_cts;             /* which bit to read as CTS */
           uint8_t cs_rr0_pps;             /* which bit to use for PPS */
           /* the above is set only while CRTSCTS is enabled. */
   
           uint8_t cs_wr5_dtr;             /* which bit to write as DTR */
           uint8_t cs_wr5_rts;             /* which bit to write as RTS */
           /* the above is set only while CRTSCTS is enabled. */
   
           volatile uint8_t cs_softreq;    /* need soft interrupt call */
           char    cs_cua;                 /* CUA mode flag */
   
           /*
            * For strange systems that have oddly wired serial ports, we
            * provide a pointer to the channel state of the port that has
            * our status lines on it.
            */
           struct  zs_chanstate *cs_ctl_chan;
   
           /* power management hooks */
           int     (*enable)(struct zs_chanstate *);
           void    (*disable)(struct zs_chanstate *);
           int     enabled;
   
           /* MD code might define a larger variant of this. */
   };
   
   struct consdev;
   struct zsc_attach_args {
           char *type;             /* type name 'serial', 'keyboard', 'mouse' */
           int channel;            /* two serial channels per zsc */
           int hwflags;            /* see definitions below */
           /* `consdev' is only valid if ZS_HWFLAG_USE_CONSDEV is set */
           struct consdev *consdev;
   };
   /* In case of split console devices, use these: */
   #define ZS_HWFLAG_CONSOLE_INPUT         1
   #define ZS_HWFLAG_CONSOLE_OUTPUT        2
   #define ZS_HWFLAG_CONSOLE               \
           (ZS_HWFLAG_CONSOLE_INPUT | ZS_HWFLAG_CONSOLE_OUTPUT)
   #define ZS_HWFLAG_NO_DCD        4       /* Ignore the DCD bit */
   #define ZS_HWFLAG_NO_CTS        8       /* Ignore the CTS bit */
   #define ZS_HWFLAG_RAW           16      /* advise raw mode */
   #define ZS_HWFLAG_USE_CONSDEV   32      /* Use console ops from `consdev' */
   #define ZS_HWFLAG_NORESET       64      /* Don't reset at attach time */
   
   int     zsc_intr_soft(void *);
   int     zsc_intr_hard(void *);
   
   void    zs_abort(struct zs_chanstate *);
   void    zs_break(struct zs_chanstate *, int);
   void    zs_iflush(struct zs_chanstate *);
   void    zs_loadchannelregs(struct zs_chanstate *);
   int     zs_set_speed(struct zs_chanstate *, int);
   int     zs_set_modes(struct zs_chanstate *, int);
   
   extern int zs_major;

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