The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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

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    1 /*      $NetBSD: z8530sc.h,v 1.25.12.1 2011/01/16 12:54:43 bouyer Exp $ */
    2 
    3 /*
    4  * Copyright (c) 1992, 1993
    5  *      The Regents of the University of California.  All rights reserved.
    6  *
    7  * This software was developed by the Computer Systems Engineering group
    8  * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
    9  * contributed to Berkeley.
   10  *
   11  * All advertising materials mentioning features or use of this software
   12  * must display the following acknowledgement:
   13  *      This product includes software developed by the University of
   14  *      California, Lawrence Berkeley Laboratory.
   15  *
   16  * Redistribution and use in source and binary forms, with or without
   17  * modification, are permitted provided that the following conditions
   18  * are met:
   19  * 1. Redistributions of source code must retain the above copyright
   20  *    notice, this list of conditions and the following disclaimer.
   21  * 2. Redistributions in binary form must reproduce the above copyright
   22  *    notice, this list of conditions and the following disclaimer in the
   23  *    documentation and/or other materials provided with the distribution.
   24  * 3. Neither the name of the University nor the names of its contributors
   25  *    may be used to endorse or promote products derived from this software
   26  *    without specific prior written permission.
   27  *
   28  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   29  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   30  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   31  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   32  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   33  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   34  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   35  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   36  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   37  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   38  * SUCH DAMAGE.
   39  *
   40  *      @(#)zsvar.h     8.1 (Berkeley) 6/11/93
   41  */
   42 
   43 /*
   44  * Copyright (c) 1994 Gordon W. Ross
   45  *
   46  * This software was developed by the Computer Systems Engineering group
   47  * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
   48  * contributed to Berkeley.
   49  *
   50  * All advertising materials mentioning features or use of this software
   51  * must display the following acknowledgement:
   52  *      This product includes software developed by the University of
   53  *      California, Lawrence Berkeley Laboratory.
   54  *
   55  * Redistribution and use in source and binary forms, with or without
   56  * modification, are permitted provided that the following conditions
   57  * are met:
   58  * 1. Redistributions of source code must retain the above copyright
   59  *    notice, this list of conditions and the following disclaimer.
   60  * 2. Redistributions in binary form must reproduce the above copyright
   61  *    notice, this list of conditions and the following disclaimer in the
   62  *    documentation and/or other materials provided with the distribution.
   63  * 3. All advertising materials mentioning features or use of this software
   64  *    must display the following acknowledgement:
   65  *      This product includes software developed by the University of
   66  *      California, Berkeley and its contributors.
   67  * 4. Neither the name of the University nor the names of its contributors
   68  *    may be used to endorse or promote products derived from this software
   69  *    without specific prior written permission.
   70  *
   71  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   72  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   73  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   74  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   75  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   76  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   77  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   78  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   79  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   80  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   81  * SUCH DAMAGE.
   82  *
   83  *      @(#)zsvar.h     8.1 (Berkeley) 6/11/93
   84  */
   85 
   86 #ifdef _KERNEL_OPT
   87 #include "locators.h"
   88 #endif
   89 
   90 /*
   91  * Function vector - per channel
   92  */
   93 struct zs_chanstate;
   94 struct zsops {
   95         void    (*zsop_rxint)(struct zs_chanstate *);
   96                                         /* receive char available */
   97         void    (*zsop_stint)(struct zs_chanstate *, int);
   98                                         /* external/status */
   99         void    (*zsop_txint)(struct zs_chanstate *);
  100                                         /* xmit buffer empty */
  101         void    (*zsop_softint)(struct zs_chanstate *);
  102                                         /* process software interrupt */
  103 };
  104 
  105 extern struct zsops zsops_null;
  106 
  107 
  108 /*
  109  * Software state, per zs channel.
  110  */
  111 struct zs_chanstate {
  112 
  113         /* Pointers to the device registers. */
  114         volatile uint8_t *cs_reg_csr;   /* ctrl, status, and reg. number. */
  115         volatile uint8_t *cs_reg_data;  /* data or numbered register */
  116 
  117         int     cs_channel;             /* sub-unit number */
  118         void   *cs_private;             /* sub-driver data pointer */
  119         struct zsops *cs_ops;
  120 
  121         kmutex_t cs_lock;               /* per channel lock */
  122 
  123         int     cs_brg_clk;             /* BAUD Rate Generator clock
  124                                          * (usually PCLK / 16) */
  125         int     cs_defspeed;            /* default baud rate */
  126         int     cs_defcflag;            /* default cflag */
  127 
  128         /*
  129          * We must keep a copy of the write registers as they are
  130          * mostly write-only and we sometimes need to set and clear
  131          * individual bits (e.g., in WR3).  Not all of these are
  132          * needed but 16 bytes is cheap and this makes the addressing
  133          * simpler.  Unfortunately, we can only write to some registers
  134          * when the chip is not actually transmitting, so whenever
  135          * we are expecting a `transmit done' interrupt the preg array
  136          * is allowed to `get ahead' of the current values.  In a
  137          * few places we must change the current value of a register,
  138          * rather than (or in addition to) the pending value; for these
  139          * cs_creg[] contains the current value.
  140          */
  141         uint8_t cs_creg[16];            /* current values */
  142         uint8_t cs_preg[16];            /* pending values */
  143         int     cs_heldchange;          /* change pending (creg != preg) */
  144 
  145         uint8_t cs_rr0;                 /* last rr0 processed */
  146         uint8_t cs_rr0_delta;           /* rr0 changes at status intr. */
  147         uint8_t cs_rr0_mask;            /* rr0 bits that stop output */
  148         uint8_t cs_rr0_dcd;             /* which bit to read as DCD */
  149         uint8_t cs_rr0_cts;             /* which bit to read as CTS */
  150         uint8_t cs_rr0_pps;             /* which bit to use for PPS */
  151         /* the above is set only while CRTSCTS is enabled. */
  152 
  153         uint8_t cs_wr5_dtr;             /* which bit to write as DTR */
  154         uint8_t cs_wr5_rts;             /* which bit to write as RTS */
  155         /* the above is set only while CRTSCTS is enabled. */
  156 
  157         volatile uint8_t cs_softreq;    /* need soft interrupt call */
  158         char    cs_spare1;      /* (for skippy :) */
  159 
  160         /*
  161          * For strange systems that have oddly wired serial ports, we
  162          * provide a pointer to the channel state of the port that has
  163          * our status lines on it.
  164          */
  165         struct  zs_chanstate *cs_ctl_chan;
  166 
  167         /* power management hooks */
  168         int     (*enable)(struct zs_chanstate *);
  169         void    (*disable)(struct zs_chanstate *);
  170         int     enabled;
  171 
  172         /* MD code might define a larger variant of this. */
  173 };
  174 
  175 struct consdev;
  176 struct zsc_attach_args {
  177         int channel;            /* two serial channels per zsc */
  178         int hwflags;            /* see definitions below */
  179         /* `consdev' is only valid if ZS_HWFLAG_USE_CONSDEV is set */
  180         struct consdev *consdev;
  181 };
  182 
  183 #define zsccf_channel           cf_loc[ZSCCF_CHANNEL]
  184 
  185 /* In case of split console devices, use these: */
  186 #define ZS_HWFLAG_CONSOLE_INPUT         1
  187 #define ZS_HWFLAG_CONSOLE_OUTPUT        2
  188 #define ZS_HWFLAG_CONSOLE               \
  189         (ZS_HWFLAG_CONSOLE_INPUT | ZS_HWFLAG_CONSOLE_OUTPUT)
  190 #define ZS_HWFLAG_NO_DCD        4       /* Ignore the DCD bit */
  191 #define ZS_HWFLAG_NO_CTS        8       /* Ignore the CTS bit */
  192 #define ZS_HWFLAG_RAW           16      /* advise raw mode */
  193 #define ZS_HWFLAG_USE_CONSDEV   32      /* Use console ops from `consdev' */
  194 #define ZS_HWFLAG_NORESET       64      /* Don't reset at attach time */
  195 
  196 int     zsc_intr_soft(void *);
  197 int     zsc_intr_hard(void *);
  198 
  199 void    zs_abort(struct zs_chanstate *);
  200 void    zs_break(struct zs_chanstate *, int);
  201 void    zs_iflush(struct zs_chanstate *);
  202 void    zs_loadchannelregs(struct zs_chanstate *);
  203 int     zs_set_speed(struct zs_chanstate *, int);
  204 int     zs_set_modes(struct zs_chanstate *, int);
  205 void    zs_lock_init(struct zs_chanstate *);
  206 void    zs_lock_chan(struct zs_chanstate *);
  207 void    zs_unlock_chan(struct zs_chanstate *);
  208 
  209 int zs_check_kgdb(struct zs_chanstate *, int);
  210 

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