Home | History | Annotate | Line # | Download | only in dev
scivar.h revision 1.1 
      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 1.1 1994/02/28 06:06:25 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