/*      $NetBSD: dhureg.h,v 1.5 2003/04/06 15:45:12 ragge Exp $ */
/*
* Copyright (c) 1996  Ken C. Wellsch.  All rights reserved.
*
* 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. 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, Berkeley and its contributors.
* 4. 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.
*/

#ifdef notdef
union w_b
{
       u_short word;
       struct {
               u_char byte_lo;
               u_char byte_hi;
       } bytes;
};

struct DHUregs
{
       volatile union w_b u_csr;       /* Control/Status Register (R/W) */
       volatile u_short dhu_rbuf;      /* Receive Buffer (R only) */
#define dhu_txchar       dhu_rbuf       /* Transmit Character (W only) */
       volatile u_short dhu_lpr;       /* Line Parameter Register (R/W) */
       volatile u_short dhu_stat;      /* Line Status (R only) */
       volatile u_short dhu_lnctrl;    /* Line Control (R/W) */
       volatile u_short dhu_tbufad1;   /* Transmit Buffer Address 1 (R/W) */
       volatile u_short dhu_tbufad2;   /* Transmit Buffer Address 2 (R/W) */
       volatile u_short dhu_tbufcnt;   /* Transmit Buffer Count (R/W) */
};

#define dhu_csr         u_csr.word
#define dhu_csr_lo      u_csr.bytes.byte_lo
#define dhu_csr_hi      u_csr.bytes.byte_hi

typedef struct DHUregs dhuregs;
#endif

#define DHU_UBA_CSR     0
#define DHU_UBA_CSR_HI  1
#define DHU_UBA_RBUF    2
#define DHU_UBA_TXCHAR  2
#define DHU_UBA_RXTIME  DHU_UBA_TXCHAR  /* on a real dhu only */
#define DHU_UBA_LPR     4
#define DHU_UBA_STAT    6
#define DHU_UBA_FIFO    DHU_UBA_STAT    /* on a real dhu only */
#define DHU_UBA_LNCTRL  8
#define DHU_UBA_TBUFAD1 10
#define DHU_UBA_TBUFAD2 12
#define DHU_UBA_TBUFCNT 14

/* CSR bits */

#define DHU_CSR_TX_ACTION       0100000
#define DHU_CSR_TXIE            0040000
#define DHU_CSR_DIAG_FAIL       0020000
#define DHU_CSR_TX_DMA_ERROR    0010000
#define DHU_CSR_TX_LINE_MASK    0007400
#define DHU_CSR_RX_DATA_AVAIL   0000200
#define DHU_CSR_RXIE            0000100
#define DHU_CSR_MASTER_RESET    0000040
#define DHU_CSR_UNUSED          0000020
#define DHU_CSR_CHANNEL_MASK    0000017

/* RBUF bits */

#define DHU_RBUF_DATA_VALID     0100000
#define DHU_RBUF_OVERRUN_ERR    0040000
#define DHU_RBUF_FRAMING_ERR    0020000
#define DHU_RBUF_PARITY_ERR     0010000
#define DHU_RBUF_RX_LINE_MASK   0007400

#define DHU_DIAG_CODE           0070001
#define DHU_MODEM_CODE          0070000

/* TXCHAR bits */

#define DHU_TXCHAR_DATA_VALID   0100000

/* LPR bits */

#define DHU_LPR_B50             0x0
#define DHU_LPR_B75             0x1
#define DHU_LPR_B110            0x2
#define DHU_LPR_B134            0x3
#define DHU_LPR_B150            0x4
#define DHU_LPR_B300            0x5
#define DHU_LPR_B600            0x6
#define DHU_LPR_B1200           0x7
#define DHU_LPR_B1800           0x8
#define DHU_LPR_B2000           0x9
#define DHU_LPR_B2400           0xA
#define DHU_LPR_B4800           0xB
#define DHU_LPR_B7200           0xC
#define DHU_LPR_B9600           0xD
#define DHU_LPR_B19200          0xE
#define DHU_LPR_B38400          0xF

#define DHU_LPR_5_BIT_CHAR      0000000
#define DHU_LPR_6_BIT_CHAR      0000010
#define DHU_LPR_7_BIT_CHAR      0000020
#define DHU_LPR_8_BIT_CHAR      0000030
#define DHU_LPR_PARENB          0000040
#define DHU_LPR_EPAR            0000100
#define DHU_LPR_2_STOP          0000200

/* STAT bits */

#define DHU_STAT_DSR            0100000
#define DHU_STAT_RI             0020000
#define DHU_STAT_DCD            0010000
#define DHU_STAT_CTS            0004000
#define DHU_STAT_MDL            0001000
#define DHU_STAT_DHU            0000400

/* LNCTRL bits */

#define DHU_LNCTRL_DMA_ABORT    0000001
#define DHU_LNCTRL_IAUTO        0000002
#define DHU_LNCTRL_RX_ENABLE    0000004
#define DHU_LNCTRL_BREAK        0000010
#define DHU_LNCTRL_OAUTO        0000020
#define DHU_LNCTRL_FORCE_XOFF   0000040
#define DHU_LNCTRL_LINK_TYPE    0000400
#define DHU_LNCTRL_DTR          0001000
#define DHU_LNCTRL_RTS          0010000

/* TBUFAD2 bits */

#define DHU_TBUFAD2_DMA_START   0000200
#define DHU_TBUFAD2_TX_ENABLE   0100000

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