123 lines
4.5 KiB
C
123 lines
4.5 KiB
C
/* $NetBSD: sbcvar.h,v 1.2 1997/03/15 18:10:03 is Exp $ */
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/*
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* Copyright (C) 1996 Scott Reynolds. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Scott Reynolds for
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* the NetBSD Project.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Transfers smaller than this are done using PIO
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* (on assumption they're not worth PDMA overhead)
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*/
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#define MIN_DMA_LEN 128
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/*
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* Transfers larger than 8192 bytes need to be split up
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* due to the size of the PDMA space.
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*/
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#define MAX_DMA_LEN 0x2000
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#ifdef SBC_DEBUG
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# define SBC_DB_INTR 0x01
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# define SBC_DB_DMA 0x02
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# define SBC_DB_REG 0x04
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# define SBC_DB_BREAK 0x08
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# ifndef DDB
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# define Debugger() printf("Debug: sbc.c:%d\n", __LINE__)
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# endif
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# define SBC_BREAK \
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do { if (sbc_debug & SBC_DB_BREAK) Debugger(); } while (0)
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#else
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# define SBC_BREAK
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#endif
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/*
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* This structure is used to keep track of PDMA requests.
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*/
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struct sbc_pdma_handle {
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int dh_flags; /* flags */
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#define SBC_DH_BUSY 0x01 /* This handle is in use */
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#define SBC_DH_OUT 0x02 /* PDMA data out (write) */
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#define SBC_DH_DONE 0x04 /* PDMA transfer is complete */
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u_char *dh_addr; /* data buffer */
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int dh_len; /* length of data buffer */
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};
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/*
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* The first structure member has to be the ncr5380_softc
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* so we can just cast to go back and forth between them.
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*/
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struct sbc_softc {
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struct ncr5380_softc ncr_sc;
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volatile struct sbc_regs *sc_regs;
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volatile vm_offset_t sc_drq_addr;
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volatile vm_offset_t sc_nodrq_addr;
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void (*sc_clrintr) __P((struct ncr5380_softc *));
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int sc_options; /* options for this instance. */
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struct sbc_pdma_handle sc_pdma[SCI_OPENINGS];
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};
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/*
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* Options. By default, SCSI interrupts and reselect are disabled.
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* You may enable either of these features with the `flags' directive
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* in your kernel's configuration file.
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*
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* Alternatively, you can patch your kernel with DDB or some other
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* mechanism. The sc_options member of the softc is OR'd with
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* the value in sbc_options.
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*
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* The options code is based on the sparc 'si' driver's version of
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* the same.
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*/
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#define SBC_PDMA 0x01 /* Use PDMA for polled transfers */
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#define SBC_INTR 0x02 /* Allow SCSI IRQ/DRQ interrupts */
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#define SBC_RESELECT 0x04 /* Allow disconnect/reselect */
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#define SBC_OPTIONS_MASK (SBC_RESELECT|SBC_INTR|SBC_PDMA)
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#define SBC_OPTIONS_BITS "\10\3RESELECT\2INTR\1PDMA"
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extern int sbc_debug;
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extern int sbc_link_flags;
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extern int sbc_options;
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extern struct scsi_adapter sbc_ops;
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extern struct scsi_device sbc_dev;
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int sbc_pdma_in __P((struct ncr5380_softc *, int, int, u_char *));
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int sbc_pdma_out __P((struct ncr5380_softc *, int, int, u_char *));
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void sbc_irq_intr __P((void *));
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void sbc_drq_intr __P((void *));
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void sbc_dma_alloc __P((struct ncr5380_softc *));
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void sbc_dma_free __P((struct ncr5380_softc *));
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void sbc_dma_poll __P((struct ncr5380_softc *));
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void sbc_dma_setup __P((struct ncr5380_softc *));
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void sbc_dma_start __P((struct ncr5380_softc *));
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void sbc_dma_eop __P((struct ncr5380_softc *));
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void sbc_dma_stop __P((struct ncr5380_softc *));
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#ifdef SBC_DEBUG
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void decode_5380_intr __P((struct ncr5380_softc *));
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#endif
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