/* $NetBSD: sbcvar.h,v 1.13 2023/02/18 13:28:05 nat 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. 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
/*
* 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 vaddr_t sc_drq_addr;
volatile vaddr_t sc_nodrq_addr;
void (*sc_clrintr)(struct ncr5380_softc *);
volatile int sc_resid;
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_PDMA_NO_WRITE 0x08 /* No PDMA for writes */
#define SBC_OPTIONS_MASK (SBC_PDMA_NO_WRITE|SBC_RESELECT|SBC_INTR|SBC_PDMA)
#define SBC_OPTIONS_BITS "\10\4NOWRITE3RESELECT\2INTR\1PDMA"
extern int sbc_debug;
extern int sbc_link_flags;
extern int sbc_options;
int sbc_pdma_in(struct ncr5380_softc *, int, int, u_char *);
int sbc_pdma_out(struct ncr5380_softc *, int, int, u_char *);
void sbc_irq_intr(void *);
void sbc_drq_intr(void *);
void sbc_dma_alloc(struct ncr5380_softc *);
void sbc_dma_free(struct ncr5380_softc *);
void sbc_dma_poll(struct ncr5380_softc *);
void sbc_dma_setup(struct ncr5380_softc *);
void sbc_dma_start(struct ncr5380_softc *);
void sbc_dma_eop(struct ncr5380_softc *);
void sbc_dma_stop(struct ncr5380_softc *);
#ifdef SBC_DEBUG
void decode_5380_intr(struct ncr5380_softc *);
#endif