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+/* $NetBSD: sbcvar.h,v 1.1 1997/03/01 20:19:00 scottr Exp $ */
+
+/*
+ * Copyright (C) 1996 Scott Reynolds. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by Scott Reynolds for
+ * the NetBSD Project.
+ * 4. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/*
+ * Transfers smaller than this are done using PIO
+ * (on assumption they're not worth PDMA overhead)
+ */
+#define MIN_DMA_LEN 128
+
+/*
+ * Transfers larger than 8192 bytes need to be split up
+ * due to the size of the PDMA space.
+ */
+#define MAX_DMA_LEN 0x2000
+
+#ifdef SBC_DEBUG
+# define SBC_DB_INTR 0x01
+# define SBC_DB_DMA 0x02
+# define SBC_DB_REG 0x04
+# define SBC_DB_BREAK 0x08
+# ifndef DDB
+# define Debugger() printf("Debug: sbc.c:%d\n", __LINE__)
+# endif
+# define SBC_BREAK \
+ do { if (sbc_debug & SBC_DB_BREAK) Debugger(); } while (0)
+#else
+# define SBC_BREAK
+#endif
+
+/*
+ * This structure is used to keep track of PDMA requests.
+ */
+struct sbc_pdma_handle {
+ int dh_flags; /* flags */
+#define SBC_DH_BUSY 0x01 /* This handle is in use */
+#define SBC_DH_OUT 0x02 /* PDMA data out (write) */
+#define SBC_DH_DONE 0x04 /* PDMA transfer is complete */
+ u_char *dh_addr; /* data buffer */
+ int dh_len; /* length of data buffer */
+};
+
+/*
+ * The first structure member has to be the ncr5380_softc
+ * so we can just cast to go back and forth between them.
+ */
+struct sbc_softc {
+ struct ncr5380_softc ncr_sc;
+ volatile struct sbc_regs *sc_regs;
+ volatile vm_offset_t sc_drq_addr;
+ volatile vm_offset_t sc_nodrq_addr;
+ void (*sc_clrintr) __P((struct ncr5380_softc *));
+ int sc_options; /* options for this instance. */
+ struct sbc_pdma_handle sc_pdma[SCI_OPENINGS];
+};
+
+/*
+ * Options. By default, SCSI interrupts and reselect are disabled.
+ * You may enable either of these features with the `flags' directive
+ * in your kernel's configuration file.
+ *
+ * Alternatively, you can patch your kernel with DDB or some other
+ * mechanism. The sc_options member of the softc is OR'd with
+ * the value in sbc_options.
+ *
+ * The options code is based on the sparc 'si' driver's version of
+ * the same.
+ */
+#define SBC_PDMA 0x01 /* Use PDMA for polled transfers */
+#define SBC_INTR 0x02 /* Allow SCSI IRQ/DRQ interrupts */
+#define SBC_RESELECT 0x04 /* Allow disconnect/reselect */
+#define SBC_OPTIONS_MASK (SBC_RESELECT|SBC_INTR|SBC_PDMA)
+#define SBC_OPTIONS_BITS "\10\3RESELECT\2INTR\1PDMA"
+
+extern int sbc_debug;
+extern int sbc_link_flags;
+extern int sbc_options;
+extern struct scsi_adapter sbc_ops;
+extern struct scsi_device sbc_dev;
+
+int sbc_pdma_in __P((struct ncr5380_softc *, int, int, u_char *));
+int sbc_pdma_out __P((struct ncr5380_softc *, int, int, u_char *));
+void sbc_irq_intr __P((void *));
+void sbc_drq_intr __P((void *));
+void sbc_dma_alloc __P((struct ncr5380_softc *));
+void sbc_dma_free __P((struct ncr5380_softc *));
+void sbc_dma_poll __P((struct ncr5380_softc *));
+void sbc_dma_setup __P((struct ncr5380_softc *));
+void sbc_dma_start __P((struct ncr5380_softc *));
+void sbc_dma_eop __P((struct ncr5380_softc *));
+void sbc_dma_stop __P((struct ncr5380_softc *));
+#ifdef SBC_DEBUG
+void decode_5380_intr __P((struct ncr5380_softc *));
+#endif