1 /* $NetBSD: sc_mbmem.c,v 1.12 2008/04/28 20:23:37 martin 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 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * This file contains only the machine-dependent parts of the 34 * Sun-2 SCSI driver. (Autoconfig stuff and DMA functions.) 35 * The machine-independent parts are in sunscpal.c 36 * 37 * Supported hardware includes: 38 * Sun SCSI-2 on Multibus (Sun2/120,Sun2/170) 39 * Sun SCSI-2 on VME (Sun2/50,Sun3/160,Sun3/260,others?) 40 * 41 * Credits, history: 42 * 43 * Matthew Fredette took revision 1.15 of si_vme.c, and then heavily 44 * modified it to support the Sun sc. The remaining credits 45 * are from si_vme.c: 46 * 47 * David Jones wrote the initial version of this module, which 48 * included support for the VME adapter only. (no reselection). 49 * 50 * Gordon Ross added support for the OBIO adapter, and re-worked 51 * both the VME and OBIO code to support disconnect/reselect. 52 * (Required figuring out the hardware "features" noted above.) 53 * 54 * The autoconfiguration boilerplate came from Adam Glass. 55 */ 56 57 /***************************************************************** 58 * Multibus functions for sc 59 ****************************************************************/ 60 61 #include <sys/cdefs.h> 62 __KERNEL_RCSID(0, "$NetBSD: sc_mbmem.c,v 1.12 2008/04/28 20:23:37 martin Exp $"); 63 64 #include <sys/param.h> 65 #include <sys/systm.h> 66 #include <sys/errno.h> 67 #include <sys/kernel.h> 68 #include <sys/malloc.h> 69 #include <sys/device.h> 70 #include <sys/buf.h> 71 #include <sys/proc.h> 72 #include <sys/user.h> 73 74 #include <dev/scsipi/scsi_all.h> 75 #include <dev/scsipi/scsipi_all.h> 76 #include <dev/scsipi/scsipi_debug.h> 77 #include <dev/scsipi/scsiconf.h> 78 79 #include <machine/autoconf.h> 80 #include <machine/bus.h> 81 82 /* #define DEBUG XXX */ 83 84 #include <dev/ic/sunscpalreg.h> 85 #include <dev/ic/sunscpalvar.h> 86 87 /* Yes, we use a VME header file. */ 88 #include <dev/vme/screg.h> 89 90 /* 91 * Transfers smaller than this are done using PIO 92 * (on assumption they're not worth DMA overhead) 93 */ 94 #define MIN_DMA_LEN 128 95 96 /* 97 * New-style autoconfig attachment 98 */ 99 100 static int sunsc_mbmem_match(struct device *, struct cfdata *, void *); 101 static void sunsc_mbmem_attach(struct device *, struct device *, void *); 102 static int sunsc_mbmem_intr(void *); 103 104 CFATTACH_DECL(sc_mbmem, sizeof(struct sunscpal_softc), 105 sunsc_mbmem_match, sunsc_mbmem_attach, NULL, NULL); 106 107 /* 108 * Options for parity, DMA, and interrupts. 109 */ 110 int sunsc_mbmem_options = 0x00; 111 112 static int 113 sunsc_mbmem_match(struct device *parent, struct cfdata *cf, void *aux) 114 { 115 struct mbmem_attach_args *mbma = aux; 116 bus_space_handle_t bh; 117 int matched; 118 119 /* No default Multibus address. */ 120 if (mbma->mbma_paddr == -1) 121 return (0); 122 123 /* Make sure there is something there... */ 124 if (bus_space_map(mbma->mbma_bustag, mbma->mbma_paddr, SCREG_BANK_SZ, 125 0, &bh)) 126 return (0); 127 matched = (bus_space_peek_2(mbma->mbma_bustag, bh, SCREG_ICR, NULL) == 0); 128 bus_space_unmap(mbma->mbma_bustag, bh, SCREG_BANK_SZ); 129 if (!matched) 130 return (0); 131 132 /* Default interrupt priority. */ 133 if (mbma->mbma_pri == -1) 134 mbma->mbma_pri = 2; 135 136 return (1); 137 } 138 139 static void 140 sunsc_mbmem_attach(struct device *parent, struct device *self, void *args) 141 { 142 struct sunscpal_softc *sc = (void *) self; 143 struct cfdata *cf = device_cfdata(self); 144 struct mbmem_attach_args *mbma = args; 145 int i; 146 147 /* Map in the device. */ 148 sc->sunscpal_regt = mbma->mbma_bustag; 149 sc->sunscpal_dmat = mbma->mbma_dmatag; 150 if (bus_space_map(mbma->mbma_bustag, mbma->mbma_paddr, SCREG_BANK_SZ, 151 0, &sc->sunscpal_regh)) 152 panic("sunsc_mbmem_attach: can't map"); 153 154 /* Device register offsets. */ 155 sc->sunscpal_data = SCREG_DATA; 156 sc->sunscpal_cmd_stat = SCREG_CMD_STAT; 157 sc->sunscpal_icr = SCREG_ICR; 158 sc->sunscpal_dma_addr_h = SCREG_DMA_ADDR_H; 159 sc->sunscpal_dma_addr_l = SCREG_DMA_ADDR_L; 160 sc->sunscpal_dma_count = SCREG_DMA_COUNT; 161 sc->sunscpal_intvec = SCREG_INTVEC; 162 163 /* Allocate DMA handles. */ 164 i = SUNSCPAL_OPENINGS * sizeof(struct sunscpal_dma_handle); 165 sc->sc_dma_handles = (sunscpal_dma_handle_t) 166 malloc(i, M_DEVBUF, M_WAITOK); 167 if (sc->sc_dma_handles == NULL) 168 panic("sc: DMA handles malloc failed"); 169 for (i = 0; i < SUNSCPAL_OPENINGS; i++) 170 if (bus_dmamap_create(sc->sunscpal_dmat, SUNSCPAL_MAX_DMA_LEN, 171 1, SUNSCPAL_MAX_DMA_LEN, 172 0, BUS_DMA_WAITOK, &sc->sc_dma_handles[i]. 173 dh_dmamap) != 0) 174 panic("sc: DMA map create failed"); 175 176 /* Miscellaneous. */ 177 sc->sc_min_dma_len = MIN_DMA_LEN; 178 sc->sc_rev = SUNSCPAL_VARIANT_501_1006; 179 180 /* Attach interrupt handler. */ 181 bus_intr_establish(mbma->mbma_bustag, mbma->mbma_pri, IPL_BIO, 0, 182 sunsc_mbmem_intr, sc); 183 184 /* Do the common attach stuff. */ 185 sunscpal_attach(sc, (cf->cf_flags ? cf->cf_flags : sunsc_mbmem_options)); 186 } 187 188 static int 189 sunsc_mbmem_intr(void *arg) 190 { 191 struct sunscpal_softc *sc = arg; 192 int claimed; 193 194 claimed = sunscpal_intr(sc); 195 #ifdef DEBUG 196 if (!claimed) { 197 printf("sunsc_intr: spurious from SBC\n"); 198 } 199 #endif 200 /* Yes, we DID cause this interrupt. */ 201 claimed = 1; 202 203 return (claimed); 204 } 205