sc_mbmem.c revision 1.2
1 /* $NetBSD: sc_mbmem.c,v 1.2 2001/06/27 17:37:04 fredette Exp $ */ 2 3 /*- 4 * Copyright (c) 1996 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Adam Glass, David Jones, Gordon W. Ross, and Matthew Fredette. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * This file contains only the machine-dependent parts of the 41 * Sun-2 SCSI driver. (Autoconfig stuff and DMA functions.) 42 * The machine-independent parts are in sunscpal.c 43 * 44 * Supported hardware includes: 45 * Sun SCSI-2 on Multibus (Sun2/120,Sun2/170) 46 * Sun SCSI-2 on VME (Sun2/50,Sun3/160,Sun3/260,others?) 47 * 48 * Credits, history: 49 * 50 * Matthew Fredette took revision 1.15 of si_vme.c, and then heavily 51 * modified it to support the Sun sc. The remaining credits 52 * are from si_vme.c: 53 * 54 * David Jones wrote the initial version of this module, which 55 * included support for the VME adapter only. (no reselection). 56 * 57 * Gordon Ross added support for the OBIO adapter, and re-worked 58 * both the VME and OBIO code to support disconnect/reselect. 59 * (Required figuring out the hardware "features" noted above.) 60 * 61 * The autoconfiguration boilerplate came from Adam Glass. 62 */ 63 64 /***************************************************************** 65 * Multibus functions for sc 66 ****************************************************************/ 67 68 #include <sys/param.h> 69 #include <sys/systm.h> 70 #include <sys/errno.h> 71 #include <sys/kernel.h> 72 #include <sys/malloc.h> 73 #include <sys/device.h> 74 #include <sys/buf.h> 75 #include <sys/proc.h> 76 #include <sys/user.h> 77 78 #include <dev/scsipi/scsi_all.h> 79 #include <dev/scsipi/scsipi_all.h> 80 #include <dev/scsipi/scsipi_debug.h> 81 #include <dev/scsipi/scsiconf.h> 82 83 #include <machine/autoconf.h> 84 #include <machine/bus.h> 85 86 /* #define DEBUG XXX */ 87 88 #include <dev/ic/sunscpalreg.h> 89 #include <dev/ic/sunscpalvar.h> 90 91 /* Yes, we use a VME header file. */ 92 #include <dev/vme/screg.h> 93 94 /* 95 * Transfers smaller than this are done using PIO 96 * (on assumption they're not worth DMA overhead) 97 */ 98 #define MIN_DMA_LEN 128 99 100 /* 101 * New-style autoconfig attachment 102 */ 103 104 static int sunsc_mbmem_match __P((struct device *, struct cfdata *, void *)); 105 static void sunsc_mbmem_attach __P((struct device *, struct device *, void *)); 106 static int sunsc_mbmem_intr __P((void *)); 107 108 struct cfattach sc_mbmem_ca = { 109 sizeof(struct sunscpal_softc), sunsc_mbmem_match, sunsc_mbmem_attach 110 }; 111 112 /* 113 * Options for parity, DMA, and interrupts. 114 */ 115 int sunsc_mbmem_options = 0x00; 116 117 static int 118 sunsc_mbmem_match(parent, cf, aux) 119 struct device *parent; 120 struct cfdata *cf; 121 void *aux; 122 { 123 struct mbmem_attach_args *mbma = aux; 124 bus_space_handle_t bh; 125 int matched; 126 127 /* No default Multibus address. */ 128 if (mbma->mbma_paddr == -1) 129 return (0); 130 131 /* Make sure there is something there... */ 132 if (bus_space_map(mbma->mbma_bustag, mbma->mbma_paddr, SCREG_BANK_SZ, 133 0, &bh)) 134 return (0); 135 matched = (bus_space_peek_2(mbma->mbma_bustag, bh, SCREG_ICR, NULL) == 0); 136 bus_space_unmap(mbma->mbma_bustag, bh, SCREG_BANK_SZ); 137 if (!matched) 138 return (0); 139 140 /* Default interrupt priority. */ 141 if (mbma->mbma_pri == -1) 142 mbma->mbma_pri = 2; 143 144 return (1); 145 } 146 147 static void 148 sunsc_mbmem_attach(parent, self, args) 149 struct device *parent, *self; 150 void *args; 151 { 152 struct sunscpal_softc *sc = (void *) self; 153 struct cfdata *cf = self->dv_cfdata; 154 struct mbmem_attach_args *mbma = args; 155 int i; 156 157 /* Map in the device. */ 158 sc->sunscpal_regt = mbma->mbma_bustag; 159 sc->sunscpal_dmat = mbma->mbma_dmatag; 160 if (bus_space_map(mbma->mbma_bustag, mbma->mbma_paddr, SCREG_BANK_SZ, 161 0, &sc->sunscpal_regh)) 162 panic("sunsc_mbmem_attach: can't map"); 163 164 /* Device register offsets. */ 165 sc->sunscpal_data = SCREG_DATA; 166 sc->sunscpal_cmd_stat = SCREG_CMD_STAT; 167 sc->sunscpal_icr = SCREG_ICR; 168 sc->sunscpal_dma_addr_h = SCREG_DMA_ADDR_H; 169 sc->sunscpal_dma_addr_l = SCREG_DMA_ADDR_L; 170 sc->sunscpal_dma_count = SCREG_DMA_COUNT; 171 sc->sunscpal_intvec = SCREG_INTVEC; 172 173 /* Allocate DMA handles. */ 174 i = SUNSCPAL_OPENINGS * sizeof(struct sunscpal_dma_handle); 175 sc->sc_dma_handles = (sunscpal_dma_handle_t) 176 malloc(i, M_DEVBUF, M_WAITOK); 177 if (sc->sc_dma_handles == NULL) 178 panic("sc: dma handles malloc failed\n"); 179 for (i = 0; i < SUNSCPAL_OPENINGS; i++) 180 if (bus_dmamap_create(sc->sunscpal_dmat, SUNSCPAL_MAX_DMA_LEN, 181 1, SUNSCPAL_MAX_DMA_LEN, 182 0, BUS_DMA_WAITOK, &sc->sc_dma_handles[i]. 183 dh_dmamap) != 0) 184 panic("sc: dma map create failed\n"); 185 186 /* Miscellaneous. */ 187 sc->sc_min_dma_len = MIN_DMA_LEN; 188 sc->sc_rev = SUNSCPAL_VARIANT_501_1006; 189 190 /* Attach interrupt handler. */ 191 bus_intr_establish(mbma->mbma_bustag, mbma->mbma_pri, IPL_BIO, 0, 192 sunsc_mbmem_intr, sc); 193 194 /* Do the common attach stuff. */ 195 sunscpal_attach(sc, (cf->cf_flags ? cf->cf_flags : sunsc_mbmem_options)); 196 } 197 198 static int 199 sunsc_mbmem_intr(void *arg) 200 { 201 struct sunscpal_softc *sc = arg; 202 int claimed; 203 204 claimed = sunscpal_intr(sc); 205 #ifdef DEBUG 206 if (!claimed) { 207 printf("sunsc_intr: spurious from SBC\n"); 208 } 209 #endif 210 /* Yes, we DID cause this interrupt. */ 211 claimed = 1; 212 213 return (claimed); 214 } 215
Indexes created Thu Sep 25 16:09:42 GMT 2025