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      1 /*	$NetBSD: cia.h,v 1.13 2002/04/25 09:20:27 aymeric Exp $	*/
      2 
      3 /*
      4  * Mach Operating System
      5  * Copyright (c) 1992 Carnegie Mellon University
      6  * All Rights Reserved.
      7  *
      8  * Permission to use, copy, modify and distribute this software and its
      9  * documentation is hereby granted, provided that both the copyright
     10  * notice and this permission notice appear in all copies of the
     11  * software, derivative works or modified versions, and any portions
     12  * thereof, and that both notices appear in supporting documentation.
     13  *
     14  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
     15  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
     16  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
     17  *
     18  * Carnegie Mellon requests users of this software to return to
     19  *
     20  *  Software Distribution Coordinator  or  Software.Distribution (at) CS.CMU.EDU
     21  *  School of Computer Science
     22  *  Carnegie Mellon University
     23  *  Pittsburgh PA 15213-3890
     24  *
     25  * any improvements or extensions that they make and grant Carnegie Mellon
     26  * the rights to redistribute these changes.
     27  */
     28 
     29 /*
     30  * This is a rewrite (retype) of the Amiga's CIA chip register map, based
     31  * on the Hardware Reference Manual.  It is NOT based on the Amiga's
     32  *  hardware/cia.h.
     33  */
     34 
     35 #ifndef _AMIGA_CIA_
     36 #define _AMIGA_CIA_
     37 
     38 struct CIA {
     39 	volatile unsigned char pra;          char pad0[0xff];
     40 	volatile unsigned char prb;          char pad1[0xff];
     41 	volatile unsigned char ddra;         char pad2[0xff];
     42 	volatile unsigned char ddrb;         char pad3[0xff];
     43 	volatile unsigned char talo;         char pad4[0xff];
     44 	volatile unsigned char tahi;         char pad5[0xff];
     45 	volatile unsigned char tblo;         char pad6[0xff];
     46 	volatile unsigned char tbhi;         char pad7[0xff];
     47 	volatile unsigned char todlo;        char pad8[0xff];
     48 	volatile unsigned char todmid;       char pad9[0xff];
     49 	volatile unsigned char todhi;        char pada[0x1ff];
     50 	volatile unsigned char sdr;          char padc[0xff];
     51 	volatile unsigned char icr;          char padd[0xff];
     52 	volatile unsigned char cra;          char pade[0xff];
     53 	volatile unsigned char crb;          char padf[0xff];
     54 };
     55 
     56 #ifdef _KERNEL
     57 #ifndef _LOCORE
     58 extern vaddr_t CIAAbase, CIABbase, CIAADDR;
     59 #define CIABASE		(0x00BFC000)
     60 #define CIATOP		(0x00C00000)
     61 #define NCIAPG		btoc(CIATOP - CIABASE)
     62 #endif
     63 
     64 #define ciaa (*((volatile struct CIA *)CIAAbase))
     65 #define ciab (*((volatile struct CIA *)CIABbase))
     66 #endif
     67 
     68 /*
     69  * bits in CIA-B
     70  */
     71 #define CIAB_PRA_BUSY	(1<<0)
     72 #define CIAB_PRA_POUT	(1<<1)
     73 #define CIAB_PRA_SEL	(1<<2)
     74 #define CIAB_PRA_DSR	(1<<3)
     75 #define CIAB_PRA_CTS	(1<<4)
     76 #define CIAB_PRA_CD	(1<<5)
     77 #define CIAB_PRA_RTS	(1<<6)
     78 #define CIAB_PRA_DTR	(1<<7)
     79 
     80 #define CIAB_PRB_STEP	(1<<0)
     81 #define CIAB_PRB_DIR	(1<<1)
     82 #define CIAB_PRB_SIDE	(1<<2)
     83 #define CIAB_PRB_SEL0	(1<<3)
     84 #define CIAB_PRB_SEL1	(1<<4)
     85 #define CIAB_PRB_SEL2	(1<<5)
     86 #define CIAB_PRB_SEL3	(1<<6)
     87 #define CIAB_PRB_MTR	(1<<7)
     88 
     89 /*
     90  * bits in CIA-A
     91  */
     92 #define CIAA_PRA_OVL	(1<<0)
     93 #define CIAA_PRA_LED	(1<<1)
     94 #define CIAA_PRA_CHNG	(1<<2)
     95 #define CIAA_PRA_WPRO	(1<<3)
     96 #define CIAA_PRA_TK0	(1<<4)
     97 #define CIAA_PRA_RDY	(1<<5)
     98 #define CIAA_PRA_FIR0	(1<<6)
     99 #define CIAA_PRA_FIR1	(1<<7)
    100 
    101 /*
    102  * ciaa-prb is centronics interface
    103  */
    104 
    105 
    106 /*
    107  * interrupt bits
    108  */
    109 #define CIA_ICR_TA	(1<<0)
    110 #define CIA_ICR_TB	(1<<1)
    111 #define CIA_ICR_ALARM	(1<<2)
    112 #define CIA_ICR_SP	(1<<3)
    113 #define CIA_ICR_FLG	(1<<4)
    114 #define CIA_ICR_IR_SC	(1<<7)
    115 
    116 
    117 /*
    118  * since many CIA signals are low-active, these defines should make the
    119  * code more readable
    120  */
    121 #define SETDCD(c) (c &= ~CIAB_PRA_CD)
    122 #define CLRDCD(c) (c |= CIAB_PRA_CD)
    123 #define ISDCD(c)  (!(c & CIAB_PRA_CD))
    124 
    125 #define SETCTS(c) (c &= ~CIAB_PRA_CTS)
    126 #define CLRCTS(c) (c |= CIAB_PRA_CTS)
    127 #define ISCTS(c)  (!(c & CIAB_PRA_CTS))
    128 
    129 #define SETRTS(c) (c &= ~CIAB_PRA_RTS)
    130 #define CLRRTS(c) (c |= CIAB_PRA_RTS)
    131 #define ISRTS(c)  (!(c & CIAB_PRA_RTS))
    132 
    133 #define SETDTR(c) (c &= ~CIAB_PRA_DTR)
    134 #define CLRDTR(c) (c |= CIAB_PRA_DTR)
    135 #define ISDTR(c)  (!(c & CIAB_PRA_DTR))
    136 
    137 #define SETDSR(c) (c &= ~CIAB_PRA_DSR)
    138 #define CLRDSR(c) (c |= CIAB_PRA_DSR)
    139 #define ISDSR(c)  (!(c & CIAB_PRA_DSR))
    140 
    141 void dispatch_cia_ints(int, int);
    142 void ciaa_intr(void);
    143 void ciab_intr(void);
    144 
    145 #endif /* _AMIGA_CIA_ */
    146