/*      $NetBSD: frodoreg.h,v 1.6 2023/01/15 06:19:45 tsutsui Exp $     */

/*
* Copyright (c) 1997 Michael Smith.  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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
*/

/*
* Where we find the 8250-like APCI ports, and how far apart they are.
*/
#define FRODO_APCIBASE          0x0
#define FRODO_APCISPACE         0x20
#define FRODO_APCI_OFFSET(x)    (FRODO_APCIBASE + ((x) * FRODO_APCISPACE))

/*
* Other items in the Frodo part
*/

/* An mc146818-like calendar.  Only 425e has a battery and an oscillator. */
#define FRODO_CALENDAR          0x80

#define FRODO_TIMER             0xa0    /* 8254-like timer */
#define FRODO_T1_CTR            0xa0    /* counter 1 */
#define FRODO_T2_CTR            0xa4    /* counter 2 */
#define FRODO_T3_CTR            0xa8    /* counter 3 */
#define FRODO_T_CTRL            0xac    /* control register */
#define FRODO_T_PSCALE          0xb0    /* prescaler */
#define FRODO_T_PCOUNT          0xb4    /* precounter ? */
#define FRODO_T_OVCOUNT         0xb8    /* overflow counter (0, 1, 2) */

#define FRODO_PIO               0xc0    /* programmable i/o registers start
                                          here */
#define FRODO_IISR              0xc0    /* ISA Interrupt Status Register
                                          (also PIR) */
#define FRODO_IISR_SERVICE      (1<<0)  /* service switch "on" if 0 */
#define FRODO_IISR_ILOW         (1<<1)  /* IRQ 3,4,5 or 6 on ISA if 1 */
#define FRODO_IISR_IMID         (1<<2)  /* IRQ 7,9,10 or 11 on ISA if 1 */
#define FRODO_IISR_IHI          (1<<3)  /* IRQ 12,13,14 or 15 on ISA if 1 */
               /* bits 4 and 5 are DN2500 SCSI interrupts */
               /* bit 6 is unused */
#define FRODO_IISR_IOCHK        (1<<7)  /* ISA board asserted IOCHK if low */

#define FRODO_PIO_IPR           0xc4    /* input polarity register
                                          (ints 7->0) */

#define FRODO_PIO_IELR          0xc8    /* input edge/level register */

/* This is probably not used on the 4xx */
#define FRODO_DIAGCTL           0xd0    /* Diagnostic Control Register */

#define FRODO_PIC_MU            0xe0    /* upper Interrupt Mask register */
#define FRODO_PIC_ML            0xe4    /* lower Interrupt Mask register */
#define FRODO_PIC_PU            0xe8    /* upper Interrupt Pending register */
#define FRODO_PIC_PL            0xec    /* lower Interrupt Pending register */
#define FRODO_PIC_IVR           0xf8    /* Interrupt Vector register */
#define FRODO_PIC_ACK           0xf8    /* Interrupt Acknowledge */

/* Shorthand for register access. */
#define FRODO_READ(sc, reg)             ((sc)->sc_regs[(reg)])
#define FRODO_WRITE(sc, reg, val)       (sc)->sc_regs[(reg)] = (val)

/* manipulate interrupt registers */
#define FRODO_GETMASK(sc)                                               \
       ((FRODO_READ((sc), FRODO_PIC_MU) << 8) |                        \
           FRODO_READ((sc), FRODO_PIC_ML))
#define FRODO_SETMASK(sc, val) do {                                     \
       FRODO_WRITE((sc), FRODO_PIC_MU, ((val) >> 8) & 0xff);           \
       FRODO_WRITE((sc), FRODO_PIC_ML, (val) & 0xff); } while (0)

#define FRODO_GETPEND(sc)                                               \
       ((FRODO_READ((sc), FRODO_PIC_PU) << 8) |                        \
           FRODO_READ((sc), FRODO_PIC_PL))
#define FRODO_IPEND(sc)                                                 \
       (FRODO_READ((sc), FRODO_PIC_ACK) & 0x0f)

/*
* Interrupt lines.  Use FRODO_INTR_BIT() below to get a bit
* suitable for one of the interrupt mask registers.  Yes, line
* 0 is unused.
*/
#define FRODO_INTR_ILOW         1
#define FRODO_INTR_IMID         2
#define FRODO_INTR_IHI          3
#define FRODO_INTR_SCSIDMA      4       /* DN2500 only */
#define FRODO_INTR_SCSI         5       /* DN2500 only */
#define FRODO_INTR_HORIZ        6
#define FRODO_INTR_IOCHK        7
#define FRODO_INTR_CALENDAR     8
#define FRODO_INTR_TIMER0       9
#define FRODO_INTR_TIMER1       10
#define FRODO_INTR_TIMER2       11
#define FRODO_INTR_APCI0        12
#define FRODO_INTR_APCI1        13
#define FRODO_INTR_APCI2        14
#define FRODO_INTR_APCI3        15

#define FRODO_NINTR             16

#define FRODO_INTR_BIT(line)    (1 << (line))

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