1 /* $NetBSD: ahscreg.h,v 1.2 1994/10/26 02:02:46 cgd Exp $ */ 2 3 /* 4 * Copyright (c) 1994 Christian E. Hopps 5 * Copyright (c) 1982, 1990 The Regents of the University of California. 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 the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * @(#)dmareg.h 37 */ 38 #ifndef _AMIGA_DEV_AHSCREG_H_ 39 #define _AMIGA_DEV_AHSCREG_H_ 40 41 /* 42 * Hardware layout of the A3000 SDMAC. This also contains the 43 * registers for the sbic chip, but in favor of separating DMA and 44 * scsi, the scsi-driver doesn't make use of this dependency 45 */ 46 47 #define v_char volatile char 48 #define v_int volatile int 49 #define vu_char volatile u_char 50 #define vu_short volatile u_short 51 #define vu_int volatile u_int 52 53 struct sdmac { 54 short pad0; 55 vu_short DAWR; /* DACK Width Register WO */ 56 vu_int WTC; /* Word Transfer Count Register RW */ 57 short pad1; 58 vu_short CNTR; /* Control Register RW */ 59 vu_int ACR; /* Address Count Register RW */ 60 short pad2; 61 vu_short ST_DMA; /* Start DMA Transfers RW-Strobe */ 62 short pad3; 63 vu_short FLUSH; /* Flush FIFO RW-Strobe */ 64 short pad4; 65 vu_short CINT; /* Clear Interrupts RW-Strobe */ 66 short pad5; 67 vu_short ISTR; /* Interrupt Status Register RO */ 68 int pad6[7]; 69 short pad7; 70 vu_short SP_DMA; /* Stop DMA Transfers RW-Strobe */ 71 char pad8; 72 vu_char SASR; /* sbic asr */ 73 char pad9; 74 vu_char SCMD; /* sbic data */ 75 }; 76 77 /* 78 * value to go into DAWR 79 */ 80 #define DAWR_AHSC 3 /* according to A3000T service-manual */ 81 82 /* 83 * bits defined for CNTR 84 */ 85 #define CNTR_TCEN (1<<5) /* Terminal Count Enable */ 86 #define CNTR_PREST (1<<4) /* Perp Reset (not implemented :-((( ) */ 87 #define CNTR_PDMD (1<<3) /* Perp Device Mode Select (1=SCSI,0=XT/AT) */ 88 #define CNTR_INTEN (1<<2) /* Interrupt Enable */ 89 #define CNTR_DDIR (1<<1) /* Device Direction. 1==rd host, wr perp */ 90 #define CNTR_IO_DX (1<<0) /* IORDY & CSX1 Polarity Select */ 91 92 /* 93 * bits defined for ISTR 94 */ 95 #define ISTR_INTX (1<<8) /* XT/AT Interrupt pending */ 96 #define ISTR_INT_F (1<<7) /* Interrupt Follow */ 97 #define ISTR_INTS (1<<6) /* SCSI Peripheral Interrupt */ 98 #define ISTR_E_INT (1<<5) /* End-Of-Process Interrupt */ 99 #define ISTR_INT_P (1<<4) /* Interrupt Pending */ 100 #define ISTR_UE_INT (1<<3) /* Under-Run FIFO Error Interrupt */ 101 #define ISTR_OE_INT (1<<2) /* Over-Run FIFO Error Interrupt */ 102 #define ISTR_FF_FLG (1<<1) /* FIFO-Full Flag */ 103 #define ISTR_FE_FLG (1<<0) /* FIFO-Empty Flag */ 104 105 #endif /* _AMIGA_DEV_AHSCREG_H_ */ 106