/*
* Copyright (c) 1995 David Jones, Gordon W. Ross
* Copyright (c) 1994 Jarle Greipsland
* 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 authors may not be used to endorse or promote products
* derived from this software without specific prior written permission.
* 4. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by
* David Jones and Gordon Ross
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``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 AUTHORS 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.
*/
/*
* This file defines the interface between the machine-dependent
* module and the machine-independent ncr5380sbc.c module.
*/
/*
* Currently amd64, alpha, i386, mips, news68k, sparc, sun2, and vax
* use real bus space:
* acorn32: csa driver; easy to convert
* mac68k: sbc driver; easy to convert
* pc532: ncr driver; need bus.h first
* sun3: si driver; need bus.h first
*/
#if \
defined(__alpha__) || \
defined(__amd64__) || \
defined(__i386__) || \
defined(__mips__) || \
defined(news68k) || \
defined(__sparc__) || \
defined(sun2) || \
defined(__vax__)
# define NCR5380_USE_BUS_SPACE
#endif
/* These are NOT artibtrary, but map to bits in sci_tcmd */
#define PHASE_DATA_OUT 0x0
#define PHASE_DATA_IN 0x1
#define PHASE_COMMAND 0x2
#define PHASE_STATUS 0x3
#define PHASE_UNSPEC1 0x4
#define PHASE_UNSPEC2 0x5
#define PHASE_MSG_OUT 0x6
#define PHASE_MSG_IN 0x7
/*
* This illegal phase is used to prevent the 5380 from having
* a phase-match condition when we don't want one, such as
* when setting up the DMA engine or whatever...
*/
#define PHASE_INVALID PHASE_UNSPEC1
/* Per-request state. This is required in order to support reselection. */
struct sci_req {
struct scsipi_xfer *sr_xs; /* Pointer to xfer struct, NULL=unused */
int sr_target, sr_lun; /* For fast access */
void *sr_dma_hand; /* Current DMA hnadle */
uint8_t *sr_dataptr; /* Saved data pointer */
int sr_datalen;
int sr_flags; /* Internal error code */
#define SR_IMMED 1 /* Immediate command */
#define SR_SENSE 2 /* We are getting sense */
#define SR_OVERDUE 4 /* Timeout while not current */
#define SR_ERROR 8 /* Error occurred */
int sr_status; /* Status code from last cmd */
};
#define SCI_OPENINGS 16 /* How many commands we can enqueue. */
int sc_flags; /* Misc. flags and capabilities */
#define NCR5380_FORCE_POLLING 1 /* Do not use interrupts. */
/* Set bits in this to disable disconnect per-target. */
int sc_no_disconnect;
/* Set bits in this to disable parity for some target. */
int sc_parity_disable;
int sc_min_dma_len; /* Smaller than this is done with PIO */
/* Begin MI shared data */
int sc_state;
#define NCR_IDLE 0 /* Ready for new work. */
#define NCR_WORKING 0x01 /* Some command is in progress. */
#define NCR_ABORTING 0x02 /* Bailing out */
#define NCR_DOINGDMA 0x04 /* The FIFO data path is active! */
#define NCR_DROP_MSGIN 0x10 /* Discard all msgs (parity err detected) */
/* The request that has the bus now. */
struct sci_req *sc_current;
/* Active data pointer for current SCSI command. */
uint8_t *sc_dataptr;
int sc_datalen;
/* Begin MI private data */
/* The number of operations in progress on the bus */
volatile int sc_ncmds;
/* Ring buffer of pending/active requests */
struct sci_req sc_ring[SCI_OPENINGS];
int sc_rr; /* Round-robin scan pointer */
/* Active requests, by target/LUN */
struct sci_req *sc_matrix[8][8];
