FreeBSD/Linux Kernel Cross Reference
sys/dev/qbus/dlreg.h

     /*      $NetBSD: dlreg.h,v 1.6 2005/12/11 12:23:29 christos Exp $       */
     /*
      * Ben Harris, 1997
      *
      * This file is in the Public Domain.
      */
     /*
      * dlreg.h -- Definitions for the DL11 and DLV11 serial cards.
      *
     * Style in imitation of dzreg.h.
     */
    
    #ifdef notdef
    union w_b
    {
            u_short word;
            struct {
                    u_char byte_lo;
                    u_char byte_hi;
            } bytes;
    };
    
    struct DLregs
    {
            volatile u_short dl_rcsr; /* Receive Control/Status Register (R/W) */
            volatile u_short dl_rbuf; /* Receive Buffer (R) */
            volatile u_short dl_xcsr; /* Transmit Control/Status Register (R/W) */
            volatile union w_b u_xbuf; /* Transmit Buffer (W) */
    #define dl_xbuf u_xbuf.bytes.byte_lo
    };
    
    typedef struct DLregs dlregs;
    #endif
    
    #define DL_UBA_RCSR     0
    #define DL_UBA_RBUF     2
    #define DL_UBA_XCSR     4
    #define DL_UBA_XBUFL    6
    
    /* RCSR bits */
    
    #define DL_RCSR_RX_DONE         0x0080 /* Receiver Done (R) */
    #define DL_RCSR_RXIE            0x0040 /* Receiver Interrupt Enable (R/W) */
    #define DL_RCSR_READER_ENABLE   0x0001 /* [paper-tape] Reader Enable (W) */
    #define DL_RCSR_BITS            "\2\1READER_ENABLE\7RXIE\10RX_DONE\n"
    
    /* RBUF bits */
    
    #define DL_RBUF_ERR             0x8000 /* Error (R) */
    #define DL_RBUF_OVERRUN_ERR     0x4000 /* Overrun Error (R) */
    #define DL_RBUF_FRAMING_ERR     0x2000 /* Framing Error (R) */
    #define DL_RBUF_PARITY_ERR      0x1000 /* Parity Error (R) */
    #define DL_RBUF_DATA_MASK       0x00FF /* Receive Data (R) */
    #define DL_RBUF_BITS    "\2\15PARITY_ERR\16FRAMING_ERR\17OVERRUN_ERR\20ERR\n"
    
    /* XCSR bits */
    
    #define DL_XCSR_TX_READY        0x0080 /* Transmitter Ready (R) */
    #define DL_XCSR_TXIE            0x0040 /* Transmit Interrupt Enable (R/W) */
    #define DL_XCSR_TX_BREAK        0x0001 /* Transmit Break (R/W) */
    #define DL_XCSR_BITS            "\2\1TX_BREAK\7TXIE\10TX_READY\n"
    
    /* XBUF is just data byte right justified. */

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