dpt_isa.c revision 1.6
1 /* $NetBSD: dpt_isa.c,v 1.6 2001/11/13 08:01:12 lukem Exp $ */ 2 3 /* 4 * Copyright (c) 1999, 2000, 2001 Andrew Doran <ad (at) netbsd.org> 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 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 */ 29 30 /* 31 * ISA front-end for DPT EATA SCSI driver. 32 */ 33 34 #include <sys/cdefs.h> 35 __KERNEL_RCSID(0, "$NetBSD: dpt_isa.c,v 1.6 2001/11/13 08:01:12 lukem Exp $"); 36 37 #include <sys/param.h> 38 #include <sys/systm.h> 39 #include <sys/device.h> 40 #include <sys/queue.h> 41 42 #include <machine/bus.h> 43 #include <machine/intr.h> 44 45 #include <dev/scsipi/scsipi_all.h> 46 #include <dev/scsipi/scsiconf.h> 47 48 #include <dev/isa/isareg.h> 49 #include <dev/isa/isavar.h> 50 51 #include <dev/isa/isadmareg.h> 52 #include <dev/isa/isadmavar.h> 53 54 #include <dev/ic/dptreg.h> 55 #include <dev/ic/dptvar.h> 56 57 #define DPT_ISA_IOSIZE 16 58 #define DPT_ISA_MAXCCBS 16 59 60 static void dpt_isa_attach(struct device *, struct device *, void *); 61 static int dpt_isa_match(struct device *, struct cfdata *, void *); 62 static int dpt_isa_probe(struct isa_attach_args *, int); 63 static int dpt_isa_wait(bus_space_handle_t, bus_space_tag_t, u_int8_t, 64 u_int8_t); 65 66 struct cfattach dpt_isa_ca = { 67 sizeof(struct dpt_softc), dpt_isa_match, dpt_isa_attach 68 }; 69 70 /* Try 'less intrusive' addresses first */ 71 static const int dpt_isa_iobases[] = { 0x230, 0x330, 0x1f0, 0x170, 0 }; 72 73 /* 74 * Wait for the HBA status register to reach a specific state. 75 */ 76 static int 77 dpt_isa_wait(bus_space_handle_t ioh, bus_space_tag_t iot, u_int8_t mask, 78 u_int8_t state) 79 { 80 int ms; 81 82 for (ms = 2000 * 10; ms; ms--) { 83 if ((bus_space_read_1(iot, ioh, HA_STATUS) & mask) == state) 84 return (0); 85 DELAY(100); 86 } 87 88 return (-1); 89 } 90 91 /* 92 * Match a supported board. 93 */ 94 static int 95 dpt_isa_match(struct device *parent, struct cfdata *match, void *aux) 96 { 97 struct isa_attach_args *ia; 98 int i; 99 100 ia = aux; 101 102 if (ia->ia_iobase != ISACF_PORT_DEFAULT) 103 return (dpt_isa_probe(ia, ia->ia_iobase)); 104 105 for (i = 0; dpt_isa_iobases[i] != 0; i++) 106 if (dpt_isa_probe(ia, dpt_isa_iobases[i])) { 107 ia->ia_iobase = dpt_isa_iobases[i]; 108 return (1); 109 } 110 111 return (0); 112 } 113 114 /* 115 * Probe for a supported board. 116 */ 117 static int 118 dpt_isa_probe(struct isa_attach_args *ia, int iobase) 119 { 120 struct eata_cfg ec; 121 bus_space_handle_t ioh; 122 bus_space_tag_t iot; 123 int i, j, stat; 124 u_int16_t *p; 125 126 iot = ia->ia_iot; 127 128 if (bus_space_map(iot, iobase, DPT_ISA_IOSIZE, 0, &ioh) != 0) 129 return(0); 130 131 /* 132 * Assumuing the DPT BIOS reset the board, we shouldn't need to 133 * re-do it here. The tests below should weed out non-EATA devices 134 * before we start poking any registers. 135 */ 136 for (i = 1000; i; i--) { 137 if ((bus_space_read_1(iot, ioh, HA_STATUS) & HA_ST_READY) != 0) 138 break; 139 DELAY(2000); 140 } 141 142 if (i == 0) 143 goto bad; 144 145 while((((stat = bus_space_read_1(iot, ioh, HA_STATUS)) 146 != (HA_ST_READY|HA_ST_SEEK_COMPLETE)) 147 && (stat != (HA_ST_READY|HA_ST_SEEK_COMPLETE|HA_ST_ERROR)) 148 && (stat != (HA_ST_READY|HA_ST_SEEK_COMPLETE|HA_ST_ERROR|HA_ST_DRQ))) 149 || (dpt_isa_wait(ioh, iot, HA_ST_BUSY, 0))) 150 /* RAID drives still spinning up? */ 151 if (bus_space_read_1(iot, ioh, HA_ERROR) != 'D' || 152 bus_space_read_1(iot, ioh, HA_ERROR + 1) != 'P' || 153 bus_space_read_1(iot, ioh, HA_ERROR + 2) != 'T') 154 goto bad; 155 156 /* 157 * At this point we can be confident that we are dealing with a DPT 158 * HBA. Issue the read-config command and wait for the data to 159 * appear. XXX We shouldn't be doing this with PIO, but it makes it 160 * a lot easier as no DMA setup is required. 161 */ 162 bus_space_write_1(iot, ioh, HA_COMMAND, CP_PIO_GETCFG); 163 memset(&ec, 0, sizeof(ec)); 164 i = ((int)&((struct eata_cfg *)0)->ec_cfglen + 165 sizeof(ec.ec_cfglen)) >> 1; 166 p = (u_int16_t *)&ec; 167 168 if (dpt_isa_wait(ioh, iot, 0xFF, HA_ST_DATA_RDY)) 169 goto bad; 170 171 /* Begin reading */ 172 while (i--) 173 *p++ = bus_space_read_stream_2(iot, ioh, HA_DATA); 174 175 if ((i = ec.ec_cfglen) > (sizeof(struct eata_cfg) 176 - (int)(&(((struct eata_cfg *)0L)->ec_cfglen)) 177 - sizeof(ec.ec_cfglen))) 178 i = sizeof(struct eata_cfg) 179 - (int)(&(((struct eata_cfg *)0L)->ec_cfglen)) 180 - sizeof(ec.ec_cfglen); 181 182 j = i + (int)(&(((struct eata_cfg *)0L)->ec_cfglen)) + 183 sizeof(ec.ec_cfglen); 184 i >>= 1; 185 186 while (i--) 187 *p++ = bus_space_read_stream_2(iot, ioh, HA_DATA); 188 189 /* Flush until we have read 512 bytes. */ 190 i = (512 - j + 1) >> 1; 191 while (i--) 192 bus_space_read_stream_2(iot, ioh, HA_DATA); 193 194 /* Puke if we don't like the returned configuration data. */ 195 if ((bus_space_read_1(iot, ioh, HA_STATUS) & HA_ST_ERROR) != 0 || 196 memcmp(ec.ec_eatasig, "EATA", 4) != 0 || 197 (ec.ec_feat0 & (EC_F0_HBA_VALID | EC_F0_DMA_SUPPORTED)) != 198 (EC_F0_HBA_VALID | EC_F0_DMA_SUPPORTED)) 199 goto bad; 200 201 /* 202 * Which DMA channel to use: if it was hardwired in the kernel 203 * configuration, use that value. If the HBA told us, use that 204 * value. Otherwise, puke. 205 */ 206 if (ia->ia_drq == -1) { 207 int dmanum = ((ec.ec_feat1 & EC_F1_DMA_NUM_MASK) >> 208 EC_F1_DMA_NUM_SHIFT); 209 210 if ((ec.ec_feat0 & EC_F0_DMA_NUM_VALID) == 0 || dmanum > 3) 211 goto bad; 212 ia->ia_drq = "\0\7\6\5"[dmanum]; 213 } 214 215 /* 216 * Which IRQ to use: if it was hardwired in the kernel configuration, 217 * use that value. Otherwise, use what the HBA told us. 218 */ 219 if (ia->ia_irq == -1) 220 ia->ia_irq = ((ec.ec_feat1 & EC_F1_IRQ_NUM_MASK) >> 221 EC_F1_IRQ_NUM_SHIFT); 222 223 ia->ia_msize = 0; 224 ia->ia_iosize = DPT_ISA_IOSIZE; 225 bus_space_unmap(iot, ioh, DPT_ISA_IOSIZE); 226 return (1); 227 bad: 228 bus_space_unmap(iot, ioh, DPT_ISA_IOSIZE); 229 return (0); 230 } 231 232 /* 233 * Attach a matched board. 234 */ 235 static void 236 dpt_isa_attach(struct device *parent, struct device *self, void *aux) 237 { 238 struct isa_attach_args *ia; 239 isa_chipset_tag_t ic; 240 bus_space_handle_t ioh; 241 bus_space_tag_t iot; 242 struct dpt_softc *sc; 243 struct eata_cfg *ec; 244 int error; 245 246 ia = aux; 247 sc = (struct dpt_softc *)self; 248 iot = ia->ia_iot; 249 ic = ia->ia_ic; 250 251 printf(": "); 252 253 if ((error = bus_space_map(iot, ia->ia_iobase, DPT_ISA_IOSIZE, 0, 254 &ioh)) != 0) { 255 printf("can't map i/o space, error = %d\n", error); 256 return; 257 } 258 259 sc->sc_iot = iot; 260 sc->sc_ioh = ioh; 261 sc->sc_dmat = ia->ia_dmat; 262 263 if ((error = isa_dmacascade(ic, ia->ia_drq)) != 0) { 264 printf("unable to cascade DRQ, error = %d\n", error); 265 return; 266 } 267 268 /* Establish the interrupt. */ 269 sc->sc_ih = isa_intr_establish(ic, ia->ia_irq, IST_EDGE, IPL_BIO, 270 dpt_intr, sc); 271 if (sc->sc_ih == NULL) { 272 printf("can't establish interrupt\n"); 273 return; 274 } 275 276 if (dpt_readcfg(sc)) { 277 printf("readcfg failed - see dpt(4)\n"); 278 return; 279 } 280 281 /* 282 * Now attach to the bus-independent code. XXX We need to force 283 * parameters that aren't filled in by some ISA boards. In 284 * particular, due to the limited amount of memory we have to play 285 * with for DMA, clamp the number of CCBs to 16. 286 */ 287 ec = &sc->sc_ec; 288 289 if (be16toh(*(int16_t *)ec->ec_queuedepth) > DPT_ISA_MAXCCBS) 290 *(int16_t *)ec->ec_queuedepth = htobe16(DPT_ISA_MAXCCBS); 291 if (ec->ec_maxlun == 0) 292 ec->ec_maxlun = 7; 293 if ((ec->ec_feat3 & EC_F3_MAX_TARGET_MASK) >> EC_F3_MAX_TARGET_SHIFT 294 == 0) 295 ec->ec_feat3 = (ec->ec_feat3 & ~EC_F3_MAX_TARGET_MASK) | 296 (7 << EC_F3_MAX_TARGET_SHIFT); 297 298 /* Now attach to the bus-independent code. */ 299 dpt_init(sc, NULL); 300 } 301
Indexes created Wed Oct 01 19:09:53 GMT 2025