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