spc.c revision 1.4
1 /* $NetBSD: spc.c,v 1.4 2005/01/02 12:03:13 tsutsui Exp $ */ 2 3 /* 4 * Copyright (c) 2003 Izumi Tsutsui. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. The name of the author may not be used to endorse or promote products 16 * derived from this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 */ 29 30 #include "opt_ddb.h" 31 32 #include <sys/cdefs.h> /* RCS ID & Copyright macro defns */ 33 34 __KERNEL_RCSID(0, "$NetBSD: spc.c,v 1.4 2005/01/02 12:03:13 tsutsui Exp $"); 35 36 #include <sys/param.h> 37 #include <sys/systm.h> 38 #include <sys/device.h> 39 40 #include <machine/autoconf.h> 41 #include <machine/bus.h> 42 #include <machine/cpu.h> 43 #include <machine/intr.h> 44 45 #include <hp300/dev/dioreg.h> 46 #include <hp300/dev/diovar.h> 47 #include <hp300/dev/diodevs.h> 48 49 #include <dev/scsipi/scsi_all.h> 50 #include <dev/scsipi/scsipi_all.h> 51 #include <dev/scsipi/scsi_message.h> 52 #include <dev/scsipi/scsiconf.h> 53 54 #include <dev/ic/mb89352reg.h> 55 #include <dev/ic/mb89352var.h> 56 57 #include <hp300/dev/hp98265reg.h> 58 #include <hp300/dev/dmareg.h> 59 #include <hp300/dev/dmavar.h> 60 61 static int spc_dio_match(struct device *, struct cfdata *, void *); 62 static void spc_dio_attach(struct device *, struct device *, void *); 63 static void spc_dio_dmastart(struct spc_softc *, void *, size_t, int); 64 static void spc_dio_dmadone(struct spc_softc *); 65 static void spc_dio_dmago(void *); 66 static void spc_dio_dmastop(void *); 67 68 struct spc_dio_softc { 69 struct spc_softc sc_spc; /* MI spc softc */ 70 71 /* DIO specific goo. */ 72 struct bus_space_tag sc_tag; /* bus space tag with oddbyte func */ 73 bus_space_handle_t sc_iohsc; /* bus space handle for HPSCSI */ 74 struct dmaqueue sc_dq; /* DMA job queue */ 75 u_int sc_dflags; /* DMA flags */ 76 #define SCSI_DMA32 0x01 /* 32-bit DMA should be used */ 77 #define SCSI_HAVEDMA 0x02 /* controller has DMA channel */ 78 #define SCSI_DATAIN 0x04 /* DMA direction */ 79 }; 80 81 CFATTACH_DECL(spc, sizeof(struct spc_dio_softc), 82 spc_dio_match, spc_dio_attach, NULL, NULL); 83 84 static int 85 spc_dio_match(struct device *parent, struct cfdata *cf, void *aux) 86 { 87 struct dio_attach_args *da = aux; 88 89 switch (da->da_id) { 90 case DIO_DEVICE_ID_SCSI0: 91 case DIO_DEVICE_ID_SCSI1: 92 case DIO_DEVICE_ID_SCSI2: 93 case DIO_DEVICE_ID_SCSI3: 94 return 1; 95 } 96 97 return 0; 98 } 99 100 static void 101 spc_dio_attach(struct device *parent, struct device *self, void *aux) 102 { 103 struct spc_dio_softc *dsc = (struct spc_dio_softc *)self; 104 struct spc_softc *sc = &dsc->sc_spc; 105 struct dio_attach_args *da = aux; 106 bus_space_tag_t iot = &dsc->sc_tag; 107 bus_space_handle_t iohsc, iohspc; 108 uint8_t id; 109 110 memcpy(iot, da->da_bst, sizeof(struct bus_space_tag)); 111 dio_set_bus_space_oddbyte(iot); 112 113 if (bus_space_map(iot, da->da_addr, da->da_size, 0, &iohsc)) { 114 printf(": can't map SCSI registers\n"); 115 return; 116 } 117 118 if (bus_space_subregion(iot, iohsc, SPC_OFFSET, SPC_SIZE, &iohspc)) { 119 printf(": can't map SPC registers\n"); 120 return; 121 } 122 123 printf(": 98265A SCSI"); 124 125 bus_space_write_1(iot, iohsc, HPSCSI_ID, 0xff); 126 DELAY(100); 127 id = bus_space_read_1(iot, iohsc, HPSCSI_ID); 128 if ((id & ID_WORD_DMA) == 0) { 129 printf(", 32-bit DMA"); 130 dsc->sc_dflags |= SCSI_DMA32; 131 } 132 id &= ID_MASK; 133 printf(", SCSI ID %d\n", id); 134 135 sc->sc_iot = iot; 136 sc->sc_ioh = iohspc; 137 sc->sc_initiator = id; 138 139 sc->sc_dma_start = spc_dio_dmastart; 140 sc->sc_dma_done = spc_dio_dmadone; 141 142 dsc->sc_iohsc = iohsc; 143 dsc->sc_dq.dq_softc = dsc; 144 dsc->sc_dq.dq_start = spc_dio_dmago; 145 dsc->sc_dq.dq_done = spc_dio_dmastop; 146 147 bus_space_write_1(iot, iohsc, HPSCSI_CSR, 0x00); 148 bus_space_write_1(iot, iohsc, HPSCSI_HCONF, 0x00); 149 150 dio_intr_establish(spc_intr, (void *)sc, da->da_ipl, IPL_BIO); 151 152 spc_attach(sc); 153 154 /* Enable SPC interrupts. */ 155 bus_space_write_1(iot, iohsc, HPSCSI_CSR, CSR_IE); 156 } 157 158 static void 159 spc_dio_dmastart(struct spc_softc *sc, void *addr, size_t size, int datain) 160 { 161 struct spc_dio_softc *dsc = (struct spc_dio_softc *)sc; 162 163 dsc->sc_dq.dq_chan = DMA0 | DMA1; 164 dsc->sc_dflags |= SCSI_HAVEDMA; 165 if (datain) 166 dsc->sc_dflags |= SCSI_DATAIN; 167 else 168 dsc->sc_dflags &= ~SCSI_DATAIN; 169 170 if (dmareq(&dsc->sc_dq) != 0) 171 /* DMA channel is available, so start DMA immediately */ 172 spc_dio_dmago((void *)dsc); 173 /* else dma start function will be called later from dmafree(). */ 174 } 175 176 static void 177 spc_dio_dmago(void *arg) 178 { 179 struct spc_dio_softc *dsc = (struct spc_dio_softc *)arg; 180 struct spc_softc *sc = &dsc->sc_spc; 181 bus_space_tag_t iot; 182 bus_space_handle_t iohsc, iohspc; 183 int len, chan; 184 uint32_t dmaflags; 185 uint8_t cmd; 186 187 iot = sc->sc_iot; 188 iohspc = sc->sc_ioh; 189 iohsc = dsc->sc_iohsc; 190 191 bus_space_write_1(iot, iohsc, HPSCSI_HCONF, 0); 192 193 cmd = CSR_IE; 194 dmaflags = DMAGO_NOINT; 195 chan = dsc->sc_dq.dq_chan; 196 if ((dsc->sc_dflags & SCSI_DATAIN) != 0) { 197 cmd |= CSR_DMAIN; 198 dmaflags |= DMAGO_READ; 199 } 200 if ((dsc->sc_dflags & SCSI_DMA32) != 0 && 201 ((u_int)sc->sc_dp & 3) == 0 && 202 (sc->sc_dleft & 3) == 0) { 203 cmd |= CSR_DMA32; 204 dmaflags |= DMAGO_LWORD; 205 } else 206 dmaflags |= DMAGO_WORD; 207 208 dmago(chan, sc->sc_dp, sc->sc_dleft, dmaflags); 209 210 bus_space_write_1(iot, iohsc, HPSCSI_CSR, cmd); 211 cmd |= (chan == 0) ? CSR_DE0 : CSR_DE1; 212 bus_space_write_1(iot, iohsc, HPSCSI_CSR, cmd); 213 214 cmd = SCMD_XFR; 215 len = sc->sc_dleft; 216 217 if ((len & (DEV_BSIZE - 1)) != 0) /* XXX ??? */ { 218 cmd |= SCMD_PAD; 219 #if 0 220 if ((dsc->sc_dflags & SCSI_DATAIN) != 0) 221 len += 2; /* XXX ??? */ 222 #endif 223 } 224 225 bus_space_write_1(iot, iohspc, TCH, len >> 16); 226 bus_space_write_1(iot, iohspc, TCM, len >> 8); 227 bus_space_write_1(iot, iohspc, TCL, len); 228 bus_space_write_1(iot, iohspc, PCTL, sc->sc_phase | PCTL_BFINT_ENAB); 229 bus_space_write_1(iot, iohspc, SCMD, cmd); 230 231 sc->sc_flags |= SPC_DOINGDMA; 232 } 233 234 static void 235 spc_dio_dmadone(struct spc_softc *sc) 236 { 237 struct spc_dio_softc *dsc = (struct spc_dio_softc *)sc; 238 bus_space_tag_t iot; 239 bus_space_handle_t ioh, iohsc; 240 int resid, trans; 241 uint8_t cmd; 242 243 iot = sc->sc_iot; 244 ioh = sc->sc_ioh; 245 iohsc = dsc->sc_iohsc; 246 247 /* wait DMA complete */ 248 if ((bus_space_read_1(iot, ioh, SSTS) & SSTS_BUSY) != 0) { 249 int timeout = 1000; /* XXX how long? */ 250 while ((bus_space_read_1(iot, ioh, SSTS) & SSTS_BUSY) != 0) { 251 if (--timeout < 0) 252 printf("%s: DMA complete timeout\n", 253 sc->sc_dev.dv_xname); 254 DELAY(1); 255 } 256 } 257 258 if ((dsc->sc_dflags & SCSI_HAVEDMA) != 0) { 259 dmafree(&dsc->sc_dq); 260 dsc->sc_dflags &= ~SCSI_HAVEDMA; 261 } 262 263 cmd = bus_space_read_1(iot, iohsc, HPSCSI_CSR); 264 cmd &= ~(CSR_DE1|CSR_DE0); 265 bus_space_write_1(iot, iohsc, HPSCSI_CSR, cmd); 266 267 resid = bus_space_read_1(iot, ioh, TCH) << 16 | 268 bus_space_read_1(iot, ioh, TCM) << 8 | 269 bus_space_read_1(iot, ioh, TCL); 270 trans = sc->sc_dleft - resid; 271 sc->sc_dp += trans; 272 sc->sc_dleft -= trans; 273 274 sc->sc_flags &= ~SPC_DOINGDMA; 275 } 276 277 static void 278 spc_dio_dmastop(void *arg) 279 { 280 struct spc_dio_softc *dsc = (struct spc_dio_softc *)arg; 281 struct spc_softc *sc = &dsc->sc_spc; 282 uint8_t cmd; 283 284 /* XXX When is this function called? */ 285 cmd = bus_space_read_1(sc->sc_iot, dsc->sc_iohsc, HPSCSI_CSR); 286 cmd &= ~(CSR_DE1|CSR_DE0); 287 bus_space_write_1(sc->sc_iot, dsc->sc_iohsc, HPSCSI_CSR, cmd); 288 289 dsc->sc_dflags &= ~SCSI_HAVEDMA; 290 sc->sc_flags &= ~SPC_DOINGDMA; 291 } 292
Indexes created Wed Oct 01 19:09:53 GMT 2025