1 /* $NetBSD: ncr5380var.h,v 1.32 2008/04/04 16:00:58 tsutsui 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-independent ncr5380sbc.c module. 38 */ 39 40 /* 41 * Currently acorn26, amd64, alpha, i386, mips, news68k, sparc, sun2, and vax 42 * use real bus space: 43 * acorn32: csa driver; easy to convert 44 * mac68k: sbc driver; easy to convert 45 * pc532: ncr driver; need bus.h first 46 * sun3: si driver; need bus.h first 47 */ 48 #if defined(acorn26) || \ 49 defined(__alpha__) || \ 50 defined(__amd64__) || \ 51 defined(__i386__) || \ 52 defined(__mips__) || \ 53 defined(news68k) || \ 54 defined(__sparc__) || \ 55 defined(sun2) || \ 56 defined(__vax__) 57 # define NCR5380_USE_BUS_SPACE 58 #endif 59 60 /* 61 * Handy read/write macros 62 */ 63 #ifdef NCR5380_USE_BUS_SPACE 64 # include <sys/bus.h> 65 /* bus_space() variety */ 66 # define NCR5380_READ(sc, reg) bus_space_read_1(sc->sc_regt, \ 67 sc->sc_regh, sc->reg) 68 # define NCR5380_WRITE(sc, reg, val) bus_space_write_1(sc->sc_regt, \ 69 sc->sc_regh, sc->reg, val) 70 #else 71 /* legacy memory-mapped variety */ 72 # define NCR5380_READ(sc, reg) (*sc->reg) 73 # define NCR5380_WRITE(sc, reg, val) do { *(sc->reg) = val; } while (0) 74 #endif 75 76 #define SCI_CLR_INTR(sc) NCR5380_READ(sc, sci_iack) 77 #define SCI_BUSY(sc) (NCR5380_READ(sc, sci_bus_csr) & SCI_BUS_BSY) 78 79 /* These are NOT artibtrary, but map to bits in sci_tcmd */ 80 #define PHASE_DATA_OUT 0x0 81 #define PHASE_DATA_IN 0x1 82 #define PHASE_COMMAND 0x2 83 #define PHASE_STATUS 0x3 84 #define PHASE_UNSPEC1 0x4 85 #define PHASE_UNSPEC2 0x5 86 #define PHASE_MSG_OUT 0x6 87 #define PHASE_MSG_IN 0x7 88 89 /* 90 * This illegal phase is used to prevent the 5380 from having 91 * a phase-match condition when we don't want one, such as 92 * when setting up the DMA engine or whatever... 93 */ 94 #define PHASE_INVALID PHASE_UNSPEC1 95 96 97 /* Per-request state. This is required in order to support reselection. */ 98 struct sci_req { 99 struct scsipi_xfer *sr_xs; /* Pointer to xfer struct, NULL=unused */ 100 int sr_target, sr_lun; /* For fast access */ 101 void *sr_dma_hand; /* Current DMA hnadle */ 102 uint8_t *sr_dataptr; /* Saved data pointer */ 103 int sr_datalen; 104 int sr_flags; /* Internal error code */ 105 #define SR_IMMED 1 /* Immediate command */ 106 #define SR_SENSE 2 /* We are getting sense */ 107 #define SR_OVERDUE 4 /* Timeout while not current */ 108 #define SR_ERROR 8 /* Error occurred */ 109 int sr_status; /* Status code from last cmd */ 110 }; 111 #define SCI_OPENINGS 16 /* How many commands we can enqueue. */ 112 113 114 struct ncr5380_softc { 115 device_t sc_dev; 116 struct scsipi_adapter sc_adapter; 117 struct scsipi_channel sc_channel; 118 119 #ifdef NCR5380_USE_BUS_SPACE 120 /* Pointers to bus_space */ 121 bus_space_tag_t sc_regt; 122 bus_space_handle_t sc_regh; 123 124 /* Pointers to 5380 registers. */ 125 bus_size_t sci_r0; 126 bus_size_t sci_r1; 127 bus_size_t sci_r2; 128 bus_size_t sci_r3; 129 bus_size_t sci_r4; 130 bus_size_t sci_r5; 131 bus_size_t sci_r6; 132 bus_size_t sci_r7; 133 #else 134 /* Pointers to 5380 registers. See ncr5380reg.h */ 135 volatile uint8_t *sci_r0; 136 volatile uint8_t *sci_r1; 137 volatile uint8_t *sci_r2; 138 volatile uint8_t *sci_r3; 139 volatile uint8_t *sci_r4; 140 volatile uint8_t *sci_r5; 141 volatile uint8_t *sci_r6; 142 volatile uint8_t *sci_r7; 143 #endif 144 145 /* Functions set from MD code */ 146 int (*sc_pio_out)(struct ncr5380_softc *, 147 int, int, uint8_t *); 148 int (*sc_pio_in)(struct ncr5380_softc *, 149 int, int, uint8_t *); 150 void (*sc_dma_alloc)(struct ncr5380_softc *); 151 void (*sc_dma_free)(struct ncr5380_softc *); 152 153 void (*sc_dma_setup)(struct ncr5380_softc *); 154 void (*sc_dma_start)(struct ncr5380_softc *); 155 void (*sc_dma_poll)(struct ncr5380_softc *); 156 void (*sc_dma_eop)(struct ncr5380_softc *); 157 void (*sc_dma_stop)(struct ncr5380_softc *); 158 159 void (*sc_intr_on)(struct ncr5380_softc *); 160 void (*sc_intr_off)(struct ncr5380_softc *); 161 162 int sc_flags; /* Misc. flags and capabilities */ 163 #define NCR5380_FORCE_POLLING 1 /* Do not use interrupts. */ 164 165 /* Set bits in this to disable disconnect per-target. */ 166 int sc_no_disconnect; 167 168 /* Set bits in this to disable parity for some target. */ 169 int sc_parity_disable; 170 171 int sc_min_dma_len; /* Smaller than this is done with PIO */ 172 173 /* Begin MI shared data */ 174 175 int sc_state; 176 #define NCR_IDLE 0 /* Ready for new work. */ 177 #define NCR_WORKING 0x01 /* Some command is in progress. */ 178 #define NCR_ABORTING 0x02 /* Bailing out */ 179 #define NCR_DOINGDMA 0x04 /* The FIFO data path is active! */ 180 #define NCR_DROP_MSGIN 0x10 /* Discard all msgs (parity err detected) */ 181 182 /* The request that has the bus now. */ 183 struct sci_req *sc_current; 184 185 /* Active data pointer for current SCSI command. */ 186 uint8_t *sc_dataptr; 187 int sc_datalen; 188 189 /* Begin MI private data */ 190 191 /* The number of operations in progress on the bus */ 192 volatile int sc_ncmds; 193 194 /* Ring buffer of pending/active requests */ 195 struct sci_req sc_ring[SCI_OPENINGS]; 196 int sc_rr; /* Round-robin scan pointer */ 197 198 /* Active requests, by target/LUN */ 199 struct sci_req *sc_matrix[8][8]; 200 201 /* Message stuff */ 202 int sc_prevphase; 203 204 u_int sc_msgpriq; /* Messages we want to send */ 205 u_int sc_msgoutq; /* Messages sent during last MESSAGE OUT */ 206 u_int sc_msgout; /* Message last transmitted */ 207 #define SEND_DEV_RESET 0x01 208 #define SEND_PARITY_ERROR 0x02 209 #define SEND_ABORT 0x04 210 #define SEND_REJECT 0x08 211 #define SEND_INIT_DET_ERR 0x10 212 #define SEND_IDENTIFY 0x20 213 #define SEND_SDTR 0x40 214 #define SEND_WDTR 0x80 215 #define NCR_MAX_MSG_LEN 8 216 uint8_t sc_omess[NCR_MAX_MSG_LEN]; 217 uint8_t *sc_omp; /* Outgoing message pointer */ 218 uint8_t sc_imess[NCR_MAX_MSG_LEN]; 219 uint8_t *sc_imp; /* Incoming message pointer */ 220 int sc_rev; /* Chip revision */ 221 #define NCR_VARIANT_NCR5380 0 222 #define NCR_VARIANT_DP8490 1 223 #define NCR_VARIANT_NCR53C400 2 224 #define NCR_VARIANT_PAS16 3 225 #define NCR_VARIANT_CXD1180 4 226 227 }; 228 229 void ncr5380_attach(struct ncr5380_softc *); 230 int ncr5380_detach(struct ncr5380_softc *, int); 231 int ncr5380_intr(void *); 232 void ncr5380_scsipi_request(struct scsipi_channel *, 233 scsipi_adapter_req_t, void *); 234 int ncr5380_pio_in(struct ncr5380_softc *, int, int, uint8_t *); 235 int ncr5380_pio_out(struct ncr5380_softc *, int, int, uint8_t *); 236 void ncr5380_init(struct ncr5380_softc *); 237 238 #ifdef NCR5380_DEBUG 239 struct ncr5380_softc *ncr5380_debug_sc; 240 void ncr5380_trace(const char *msg, long val); 241 #define NCR_TRACE(msg, val) ncr5380_trace(msg, val) 242 #else /* NCR5380_DEBUG */ 243 #define NCR_TRACE(msg, val) /* nada */ 244 #endif /* NCR5380_DEBUG */ 245