diff options
Diffstat (limited to 'sys/arch/mac68k/dev/sbcvar.h')
-rw-r--r-- | sys/arch/mac68k/dev/sbcvar.h | 122 |
1 files changed, 122 insertions, 0 deletions
diff --git a/sys/arch/mac68k/dev/sbcvar.h b/sys/arch/mac68k/dev/sbcvar.h new file mode 100644 index 00000000000..e6ebe9b0ce1 --- /dev/null +++ b/sys/arch/mac68k/dev/sbcvar.h @@ -0,0 +1,122 @@ +/* $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 |