sys/arch/sgimips/dev/scnvar.h

   1 /*      $NetBSD: scnvar.h,v 1.6 2006/05/12 06:05:22 simonb Exp $        */
   2
   3 /*
   4  * Copyright (c) 1996, 1997 Philip L. Budne.
   5  * Copyright (c) 1993 Philip A. Nelson.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. All advertising materials mentioning features or use of this software
  17  *    must display the following acknowledgement:
  18  *      This product includes software developed by Philip A. Nelson.
  19  * 4. The name of Philip A. Nelson may not be used to endorse or promote
  20  *    products derived from this software without specific prior written
  21  *    permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY PHILIP NELSON ``AS IS'' AND ANY EXPRESS OR
  24  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  25  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  26  * IN NO EVENT SHALL PHILIP NELSON BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  27  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  28  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
  29  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  30  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  31  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  32  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  33  *
  34  *      scnvar.h: definitions for pc532 2681/2692/26c96 duart driver
  35  */
  36
  37 /* Constants. */
  38 #ifdef COMDEF_SPEED
  39 #undef  TTYDEF_SPEED
  40 #define TTYDEF_SPEED    COMDEF_SPEED    /* default baud rate */
  41 #endif
  42
  43 #define SCN_SIZE                 0x8    /* address space for port */
  44
  45 #define SCN_CONSOLE                0    /* minor number of console */
  46 #define SCN_CONSDUART              0
  47 #define SCN_CONSCHAN               0
  48
  49 /* output port bits */
  50 #define OP_RTSA         OP_OP0
  51 #define OP_RTSB         OP_OP1
  52 #define OP_DTRA         OP_OP2
  53 #define OP_DTRB         OP_OP3
  54 /* OP4-7 not connected */
  55
  56 /* input port bits */
  57 #define IP_CTSA         IP_IP0
  58 #define IP_CTSB         IP_IP1
  59 #define IP_DCDB         IP_IP2
  60 #define IP_DCDA         IP_IP3
  61 /* IP4-6 not connected */
  62
  63 #define ACR_DELTA_CTSA  ACR_DELTA_IP0
  64 #define ACR_DELTA_CTSB  ACR_DELTA_IP1
  65 #define ACR_DELTA_DCDB  ACR_DELTA_IP2
  66 #define ACR_DELTA_DCDA  ACR_DELTA_IP3
  67
  68 #define IPCR_CTSA       IPCR_IP0
  69 #define IPCR_CTSB       IPCR_IP1
  70 #define IPCR_DCDB       IPCR_IP2
  71 #define IPCR_DCDA       IPCR_IP3
  72 #define IPCR_DELTA_CTSA IPCR_DELTA_IP0
  73 #define IPCR_DELTA_CTSB IPCR_DELTA_IP1
  74 #define IPCR_DELTA_DCDB IPCR_DELTA_IP2
  75 #define IPCR_DELTA_DCDA IPCR_DELTA_IP3
  76
  77 #define SCN_OP_BIS(SC,VAL) ((SC)->sc_duart->base[DU_OPSET] = (VAL))
  78 #define SCN_OP_BIC(SC,VAL) ((SC)->sc_duart->base[DU_OPCLR] = (VAL))
  79
  80 #define SCN_DCD(SC) (((SC)->sc_duart->base[DU_IP] & (SC)->sc_ip_dcd) == 0)
  81
  82 /* pc532 duarts are auto-sized to byte-wide */
  83 #define CH_SZ           8
  84 #define DUART_SZ        16
  85 #define SCN_REG(n)      (n << 4)                /* 15 byte pad after each reg */
  86
  87 /* The DUART description struct; for data common to both channels */
  88 struct duart {
  89         volatile u_char *base;
  90         struct chan {
  91                 struct scn_softc *sc;
  92                 struct tty *tty;
  93                 int32_t ispeed, ospeed;
  94                 u_char icode, ocode;
  95                 u_char mr0;                     /* MR0[7:3] */
  96                 u_char new_mr1;         /* held changes */
  97                 u_char new_mr2;         /* held changes */
  98         } chan[2];
  99         enum scntype { SCNUNK, SCN2681, SCN2692, SC26C92 } type;
 100         uint16_t counter;               /* C/T generated bps, or zero */
 101         uint16_t ocounter;              /* last C/T generated bps, or zero */
 102         u_char  mode;                   /* ACR[7] + MR0[2:0] */
 103         u_char  acr;                    /* ACR[6:0]*/
 104         u_char  imr;                    /* IMR bits */
 105         u_char  opcr;                   /* OPCR bits */
 106 };
 107
 108 #define SCN_RING_BITS   9       /* 512 byte buffers */
 109 #define SCN_RING_SIZE   (1<<SCN_RING_BITS)      /* must be a power of two */
 110 #define SCN_RING_MASK   (SCN_RING_SIZE-1)
 111 #define SCN_RING_THRESH (SCN_RING_SIZE/2)
 112 #define SCN_RING_HIWAT  (SCN_RING_SIZE - (SCN_RING_SIZE >> 2))
 113
 114 /* scn channel state */
 115 struct scn_softc {
 116         struct device sc_dev;
 117         struct tty *sc_tty;
 118         int     sc_unit;                /* unit number of this line (base 0) */
 119         int     sc_channel;
 120         int     sc_isconsole;
 121         int     sc_iskgdb;
 122         struct duart *sc_duart; /* pointer to duart struct */
 123         volatile u_char *sc_chbase;     /* per-channel registers (CH_xxx) */
 124         u_char  sc_swflags;             /* from config / TIOCxFLAGS */
 125 #define SCN_SW_SOFTCAR  0x01
 126 #define SCN_SW_CLOCAL   0x02
 127 #define SCN_SW_CRTSCTS  0x04
 128 #define SCN_SW_MDMBUF   0x08            /* not implemented */
 129
 130 /* I wish there was a TS_DIALOUT flag! */
 131         u_char  sc_dialout;             /* set if open for dialout */
 132 #define SCN_DIALOUT(SCN) ((SCN)->sc_dialout)
 133 #define SCN_SETDIALOUT(SCN) (SCN)->sc_dialout = 1
 134 #define SCN_CLRDIALOUT(SCN) (SCN)->sc_dialout = 0
 135
 136         u_char  sc_heldchanges;         /* waiting for output done */
 137
 138 /* bits in input port register */
 139         u_char  sc_ip_dcd;
 140         u_char  sc_ip_cts;
 141
 142 /* bits in output port registers */
 143         u_char  sc_op_rts;
 144         u_char  sc_op_dtr;
 145
 146 /* interrupt mask bits */
 147         u_char  sc_tx_int;
 148         u_char  sc_rx_int;
 149
 150 /* counters */
 151         u_long  sc_framing_errors;
 152         u_long  sc_parity_errors;
 153         u_long  sc_fifo_overruns;
 154         u_long  sc_breaks;
 155
 156 /* ring buffer for rxrdy interrupt */
 157         u_int   sc_rbget;               /* ring buffer `get' index */
 158         volatile u_int sc_rbput;        /* ring buffer `put' index */
 159         int     sc_rbhiwat;
 160         short   sc_rbuf[SCN_RING_SIZE]; /* status + data */
 161         long    sc_fotime;              /* last fifo overrun message */
 162         long    sc_rotime;              /* last ring overrun message */
 163         u_long  sc_ring_overruns;       /* number of ring buffer overruns */
 164         /* Flags to communicate with scntty_softint() */
 165         volatile char sc_rx_blocked;    /* input block at ring */
 166 };