1 /* 2 * Copyright (c) 1990 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Van Jacobson of Lawrence Berkeley Laboratory. 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 * @(#)scivar.h 7.1 (Berkeley) 5/8/90 37 * $Id: scivar.h,v 1.2 1994/05/08 05:53:42 chopps Exp $ 38 */ 39 40 struct sci_softc { 41 struct amiga_ctlr *sc_ac; 42 struct devqueue sc_dq; 43 struct devqueue sc_sq; 44 45 volatile u_char *sci_data; /* r: Current data */ 46 volatile u_char *sci_odata; /* w: Out data */ 47 volatile u_char *sci_icmd; /* rw: Initiator command */ 48 volatile u_char *sci_mode; /* rw: Mode */ 49 volatile u_char *sci_tcmd; /* rw: Target command */ 50 volatile u_char *sci_bus_csr; /* r: Bus Status */ 51 volatile u_char *sci_sel_enb; /* w: Select enable */ 52 volatile u_char *sci_csr; /* r: Status */ 53 volatile u_char *sci_dma_send; /* w: Start dma send data */ 54 volatile u_char *sci_idata; /* r: Input data */ 55 volatile u_char *sci_trecv; /* w: Start dma receive, target */ 56 volatile u_char *sci_iack; /* r: Interrupt Acknowledge */ 57 volatile u_char *sci_irecv; /* w: Start dma receive, initiator */ 58 59 int (*dma_xfer_in)(); /* psuedo DMA transfer */ 60 int (*dma_xfer_out)(); /* psuedo DMA transfer */ 61 int (*dma_intr)(); /* board-specific interrupt */ 62 u_char sc_flags; 63 u_char sc_lun; 64 /* one for each target */ 65 struct syncpar { 66 u_char state; 67 u_char period, offset; 68 } sc_sync[8]; 69 u_char sc_slave; 70 u_char sc_scsi_addr; 71 u_char sc_stat[2]; 72 u_char sc_msg[8]; 73 }; 74 75 /* sc_flags */ 76 #define SCI_IO 0x80 /* DMA I/O in progress */ 77 #define SCI_ALIVE 0x01 /* controller initialized */ 78 #define SCI_SELECTED 0x04 /* bus is in selected state. Needed for 79 correct abort procedure. */ 80 81 /* sync states */ 82 #define SYNC_START 0 /* no sync handshake started */ 83 #define SYNC_SENT 1 /* we sent sync request, no answer yet */ 84 #define SYNC_DONE 2 /* target accepted our (or inferior) settings, 85 or it rejected the request and we stay async * 86