Annotation of sys/dev/ic/ncr5380var.h, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: ncr5380var.h,v 1.11 2006/12/13 21:12:58 miod Exp $ */
! 2: /* $NetBSD: ncr5380var.h,v 1.6 1996/05/10 18:04:06 gwr Exp $ */
! 3:
! 4: /*
! 5: * Copyright (c) 1995 David Jones, Gordon W. Ross
! 6: * Copyright (c) 1994 Jarle Greipsland
! 7: * All rights reserved.
! 8: *
! 9: * Redistribution and use in source and binary forms, with or without
! 10: * modification, are permitted provided that the following conditions
! 11: * are met:
! 12: * 1. Redistributions of source code must retain the above copyright
! 13: * notice, this list of conditions and the following disclaimer.
! 14: * 2. Redistributions in binary form must reproduce the above copyright
! 15: * notice, this list of conditions and the following disclaimer in the
! 16: * documentation and/or other materials provided with the distribution.
! 17: * 3. The name of the authors may not be used to endorse or promote products
! 18: * derived from this software without specific prior written permission.
! 19: * 4. All advertising materials mentioning features or use of this software
! 20: * must display the following acknowledgement:
! 21: * This product includes software developed by
! 22: * David Jones and Gordon Ross
! 23: *
! 24: * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
! 25: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
! 26: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
! 27: * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
! 28: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
! 29: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
! 30: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
! 31: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
! 32: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
! 33: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
! 34: */
! 35:
! 36: /*
! 37: * This file defines the interface between the machine-dependent
! 38: * module and the machine-independent ncr5380sbc.c module.
! 39: */
! 40:
! 41: #define SCI_CLR_INTR(sc) (*(sc)->sci_iack)
! 42: #define SCI_BUSY(sc) (*sc->sci_bus_csr & SCI_BUS_BSY)
! 43:
! 44: /* These are NOT arbitrary, but map to bits in sci_tcmd */
! 45: #define PHASE_DATA_OUT 0x0
! 46: #define PHASE_DATA_IN 0x1
! 47: #define PHASE_COMMAND 0x2
! 48: #define PHASE_STATUS 0x3
! 49: #define PHASE_UNSPEC1 0x4
! 50: #define PHASE_UNSPEC2 0x5
! 51: #define PHASE_MSG_OUT 0x6
! 52: #define PHASE_MSG_IN 0x7
! 53:
! 54: /*
! 55: * This illegal phase is used to prevent the 5380 from having
! 56: * a phase-match condition when we don't want one, such as
! 57: * when setting up the DMA engine or whatever...
! 58: */
! 59: #define PHASE_INVALID PHASE_UNSPEC1
! 60:
! 61:
! 62: /* Per-request state. This is required in order to support reselection. */
! 63: struct sci_req {
! 64: struct scsi_xfer *sr_xs; /* Pointer to xfer struct, NULL=unused */
! 65: int sr_target, sr_lun; /* For fast access */
! 66: void *sr_dma_hand; /* Current DMA hnadle */
! 67: u_char *sr_dataptr; /* Saved data pointer */
! 68: int sr_datalen;
! 69: int sr_flags; /* Internal error code */
! 70: #define SR_IMMED 1 /* Immediate command */
! 71: #define SR_SENSE 2 /* We are getting sense */
! 72: #define SR_OVERDUE 4 /* Timeout while not current */
! 73: #define SR_ERROR 8 /* Error occurred */
! 74: int sr_status; /* Status code from last cmd */
! 75:
! 76: struct timeout sr_timeout;
! 77: };
! 78: #define SCI_OPENINGS 16 /* How many commands we can enqueue. */
! 79:
! 80:
! 81: struct ncr5380_softc {
! 82: struct device sc_dev;
! 83: struct scsi_link sc_link;
! 84:
! 85: /* Pointers to 5380 registers. See ncr5380reg.h */
! 86: volatile u_char *sci_r0;
! 87: volatile u_char *sci_r1;
! 88: volatile u_char *sci_r2;
! 89: volatile u_char *sci_r3;
! 90: volatile u_char *sci_r4;
! 91: volatile u_char *sci_r5;
! 92: volatile u_char *sci_r6;
! 93: volatile u_char *sci_r7;
! 94:
! 95: /* Functions set from MD code */
! 96: int (*sc_pio_out)(struct ncr5380_softc *,
! 97: int, int, u_char *);
! 98: int (*sc_pio_in)(struct ncr5380_softc *,
! 99: int, int, u_char *);
! 100: void (*sc_dma_alloc)(struct ncr5380_softc *);
! 101: void (*sc_dma_free)(struct ncr5380_softc *);
! 102:
! 103: void (*sc_dma_setup)(struct ncr5380_softc *);
! 104: void (*sc_dma_start)(struct ncr5380_softc *);
! 105: void (*sc_dma_poll)(struct ncr5380_softc *);
! 106: void (*sc_dma_stop)(struct ncr5380_softc *);
! 107:
! 108: void (*sc_intr_on)(struct ncr5380_softc *);
! 109: void (*sc_intr_off)(struct ncr5380_softc *);
! 110:
! 111: int sc_flags; /* Misc. flags and capabilities */
! 112: #define NCR5380_PERMIT_RESELECT 1 /* Allow disconnect/reselect */
! 113: #define NCR5380_FORCE_POLLING 2 /* Do not use interrupts. */
! 114:
! 115: /* Set bits in this to disable disconnect per-target. */
! 116: int sc_no_disconnect;
! 117:
! 118: /* Set bits in this to disable parity for some target. */
! 119: int sc_parity_disable;
! 120:
! 121: int sc_min_dma_len; /* Smaller than this is done with PIO */
! 122:
! 123: /* Begin MI shared data */
! 124:
! 125: int sc_state;
! 126: #define NCR_IDLE 0 /* Ready for new work. */
! 127: #define NCR_WORKING 0x01 /* Some command is in progress. */
! 128: #define NCR_ABORTING 0x02 /* Bailing out */
! 129: #define NCR_DOINGDMA 0x04 /* The FIFO data path is active! */
! 130: #define NCR_DROP_MSGIN 0x10 /* Discard all msgs (parity err detected) */
! 131:
! 132: /* The request that has the bus now. */
! 133: struct sci_req *sc_current;
! 134:
! 135: /* Active data pointer for current SCSI command. */
! 136: u_char *sc_dataptr;
! 137: int sc_datalen;
! 138:
! 139: /* Begin MI private data */
! 140:
! 141: /* The number of operations in progress on the bus */
! 142: volatile int sc_ncmds;
! 143:
! 144: /* Ring buffer of pending/active requests */
! 145: struct sci_req sc_ring[SCI_OPENINGS];
! 146: int sc_rr; /* Round-robin scan pointer */
! 147:
! 148: /* Active requests, by target/LUN */
! 149: struct sci_req *sc_matrix[8][8];
! 150:
! 151: /* Message stuff */
! 152: int sc_prevphase;
! 153:
! 154: u_int sc_msgpriq; /* Messages we want to send */
! 155: u_int sc_msgoutq; /* Messages sent during last MESSAGE OUT */
! 156: u_int sc_msgout; /* Message last transmitted */
! 157: #define SEND_DEV_RESET 0x01
! 158: #define SEND_PARITY_ERROR 0x02
! 159: #define SEND_ABORT 0x04
! 160: #define SEND_REJECT 0x08
! 161: #define SEND_INIT_DET_ERR 0x10
! 162: #define SEND_IDENTIFY 0x20
! 163: #define SEND_SDTR 0x40
! 164: #define SEND_WDTR 0x80
! 165: #define NCR_MAX_MSG_LEN 8
! 166: u_char sc_omess[NCR_MAX_MSG_LEN];
! 167: u_char *sc_omp; /* Outgoing message pointer */
! 168: u_char sc_imess[NCR_MAX_MSG_LEN];
! 169: u_char *sc_imp; /* Incoming message pointer */
! 170: };
! 171:
! 172: void ncr5380_init(struct ncr5380_softc *);
! 173: void ncr5380_reset_scsibus(struct ncr5380_softc *);
! 174: int ncr5380_intr(struct ncr5380_softc *);
! 175: int ncr5380_scsi_cmd(struct scsi_xfer *);
! 176: int ncr5380_pio_in(struct ncr5380_softc *, int, int, u_char *);
! 177: int ncr5380_pio_out(struct ncr5380_softc *, int, int, u_char *);
! 178:
! 179: #ifdef NCR5380_DEBUG
! 180: struct ncr5380_softc *ncr5380_debug_sc;
! 181: void ncr5380_trace(char *msg, long val);
! 182: #define NCR_TRACE(msg, val) ncr5380_trace(msg, val)
! 183: #else /* NCR5380_DEBUG */
! 184: #define NCR_TRACE(msg, val) /* nada */
! 185: #endif /* NCR5380_DEBUG */
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