uha_isa.c revision 1.6
1 /* $NetBSD: uha_isa.c,v 1.6 1996/11/15 22:53:41 jonathan Exp $ */ 2 3 /* 4 * Copyright (c) 1994, 1996 Charles M. Hannum. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. All advertising materials mentioning features or use of this software 15 * must display the following acknowledgement: 16 * This product includes software developed by Charles M. Hannum. 17 * 4. The name of the author may not be used to endorse or promote products 18 * derived from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 23 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 25 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 29 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/types.h> 33 #include <sys/param.h> 34 #include <sys/systm.h> 35 #include <sys/device.h> 36 #include <sys/kernel.h> 37 #include <sys/proc.h> 38 #include <sys/user.h> 39 40 #include <machine/bus.h> 41 #include <machine/intr.h> 42 43 #include <scsi/scsi_all.h> 44 #include <scsi/scsiconf.h> 45 46 #include <dev/isa/isavar.h> 47 #include <dev/isa/isadmavar.h> 48 49 #include <dev/ic/uhareg.h> 50 #include <dev/ic/uhavar.h> 51 52 #define UHA_ISA_IOSIZE 16 53 54 int uha_isa_probe __P((struct device *, void *, void *)); 55 void uha_isa_attach __P((struct device *, struct device *, void *)); 56 57 struct cfattach uha_isa_ca = { 58 sizeof(struct uha_softc), uha_isa_probe, uha_isa_attach 59 }; 60 61 #ifndef DDB 62 #define Debugger() panic("should call debugger here (uha_isa.c)") 63 #endif /* ! DDB */ 64 #define KVTOPHYS(x) vtophys(x) 65 66 int u14_find __P((bus_space_tag_t, bus_space_handle_t, struct uha_softc *)); 67 void u14_start_mbox __P((struct uha_softc *, struct uha_mscp *)); 68 int u14_poll __P((struct uha_softc *, struct scsi_xfer *, int)); 69 int u14_intr __P((void *)); 70 void u14_init __P((struct uha_softc *)); 71 72 /* 73 * Check the slots looking for a board we recognise 74 * If we find one, note it's address (slot) and call 75 * the actual probe routine to check it out. 76 */ 77 int 78 uha_isa_probe(parent, match, aux) 79 struct device *parent; 80 void *match, *aux; 81 { 82 struct isa_attach_args *ia = aux; 83 struct uha_softc sc; 84 bus_space_tag_t iot = ia->ia_iot; 85 bus_space_handle_t ioh; 86 int rv; 87 88 if (bus_space_map(iot, ia->ia_iobase, UHA_ISA_IOSIZE, 0, &ioh)) 89 return (0); 90 91 rv = u14_find(iot, ioh, &sc); 92 93 bus_space_unmap(iot, ioh, UHA_ISA_IOSIZE); 94 95 if (rv) { 96 if (ia->ia_irq != -1 && ia->ia_irq != sc.sc_irq) 97 return (0); 98 if (ia->ia_drq != -1 && ia->ia_drq != sc.sc_drq) 99 return (0); 100 ia->ia_irq = sc.sc_irq; 101 ia->ia_drq = sc.sc_drq; 102 ia->ia_msize = 0; 103 ia->ia_iosize = UHA_ISA_IOSIZE; 104 } 105 return (rv); 106 } 107 108 /* 109 * Attach all the sub-devices we can find 110 */ 111 void 112 uha_isa_attach(parent, self, aux) 113 struct device *parent, *self; 114 void *aux; 115 { 116 struct isa_attach_args *ia = aux; 117 struct uha_softc *sc = (void *)self; 118 bus_space_tag_t iot = ia->ia_iot; 119 bus_space_handle_t ioh; 120 isa_chipset_tag_t ic = ia->ia_ic; 121 122 printf("\n"); 123 124 if (bus_space_map(iot, ia->ia_iobase, UHA_ISA_IOSIZE, 0, &ioh)) 125 panic("uha_attach: bus_space_map failed!"); 126 127 sc->sc_iot = iot; 128 sc->sc_ioh = ioh; 129 if (!u14_find(iot, ioh, sc)) 130 panic("uha_attach: u14_find failed!"); 131 132 if (sc->sc_drq != -1) 133 isa_dmacascade(sc->sc_drq); 134 135 sc->sc_ih = isa_intr_establish(ic, sc->sc_irq, IST_EDGE, IPL_BIO, 136 u14_intr, sc); 137 if (sc->sc_ih == NULL) { 138 printf("%s: couldn't establish interrupt\n", 139 sc->sc_dev.dv_xname); 140 return; 141 } 142 143 /* Save function pointers for later use. */ 144 sc->start_mbox = u14_start_mbox; 145 sc->poll = u14_poll; 146 sc->init = u14_init; 147 148 uha_attach(sc); 149 } 150 151 /* 152 * Start the board, ready for normal operation 153 */ 154 int 155 u14_find(iot, ioh, sc) 156 bus_space_tag_t iot; 157 bus_space_handle_t ioh; 158 struct uha_softc *sc; 159 { 160 u_int16_t model, config; 161 int irq, drq; 162 int resetcount = 4000; /* 4 secs? */ 163 164 model = (bus_space_read_1(iot, ioh, U14_ID + 0) << 8) | 165 (bus_space_read_1(iot, ioh, U14_ID + 1) << 0); 166 if ((model & 0xfff0) != 0x5640) 167 return (0); 168 169 config = (bus_space_read_1(iot, ioh, U14_CONFIG + 0) << 8) | 170 (bus_space_read_1(iot, ioh, U14_CONFIG + 1) << 0); 171 172 switch (model & 0x000f) { 173 case 0x0000: 174 switch (config & U14_DMA_MASK) { 175 case U14_DMA_CH5: 176 drq = 5; 177 break; 178 case U14_DMA_CH6: 179 drq = 6; 180 break; 181 case U14_DMA_CH7: 182 drq = 7; 183 break; 184 default: 185 printf("u14_find: illegal drq setting %x\n", 186 config & U14_DMA_MASK); 187 return (0); 188 } 189 break; 190 case 0x0001: 191 /* This is a 34f, and doesn't need an ISA DMA channel. */ 192 drq = -1; 193 break; 194 default: 195 printf("u14_find: unknown model %x\n", model); 196 return (0); 197 } 198 199 switch (config & U14_IRQ_MASK) { 200 case U14_IRQ10: 201 irq = 10; 202 break; 203 case U14_IRQ11: 204 irq = 11; 205 break; 206 case U14_IRQ14: 207 irq = 14; 208 break; 209 case U14_IRQ15: 210 irq = 15; 211 break; 212 default: 213 printf("u14_find: illegal irq setting %x\n", 214 config & U14_IRQ_MASK); 215 return (0); 216 } 217 218 bus_space_write_1(iot, ioh, U14_LINT, UHA_ASRST); 219 220 while (--resetcount) { 221 if (bus_space_read_1(iot, ioh, U14_LINT)) 222 break; 223 delay(1000); /* 1 mSec per loop */ 224 } 225 if (!resetcount) { 226 printf("u14_find: board timed out during reset\n"); 227 return (0); 228 } 229 230 /* if we want to fill in softc, do so now */ 231 if (sc != NULL) { 232 sc->sc_irq = irq; 233 sc->sc_drq = drq; 234 sc->sc_scsi_dev = config & U14_HOSTID_MASK; 235 } 236 237 return (1); 238 } 239 240 /* 241 * Function to send a command out through a mailbox 242 */ 243 void 244 u14_start_mbox(sc, mscp) 245 struct uha_softc *sc; 246 struct uha_mscp *mscp; 247 { 248 bus_space_tag_t iot = sc->sc_iot; 249 bus_space_handle_t ioh = sc->sc_ioh; 250 int spincount = 100000; /* 1s should be enough */ 251 252 while (--spincount) { 253 if ((bus_space_read_1(iot, ioh, U14_LINT) & U14_LDIP) == 0) 254 break; 255 delay(100); 256 } 257 if (!spincount) { 258 printf("%s: uha_start_mbox, board not responding\n", 259 sc->sc_dev.dv_xname); 260 Debugger(); 261 } 262 263 bus_space_write_4(iot, ioh, U14_OGMPTR, KVTOPHYS(mscp)); 264 if (mscp->flags & MSCP_ABORT) 265 bus_space_write_1(iot, ioh, U14_LINT, U14_ABORT); 266 else 267 bus_space_write_1(iot, ioh, U14_LINT, U14_OGMFULL); 268 269 if ((mscp->xs->flags & SCSI_POLL) == 0) 270 timeout(uha_timeout, mscp, (mscp->timeout * hz) / 1000); 271 } 272 273 /* 274 * Function to poll for command completion when in poll mode. 275 * 276 * wait = timeout in msec 277 */ 278 int 279 u14_poll(sc, xs, count) 280 struct uha_softc *sc; 281 struct scsi_xfer *xs; 282 int count; 283 { 284 bus_space_tag_t iot = sc->sc_iot; 285 bus_space_handle_t ioh = sc->sc_ioh; 286 287 while (count) { 288 /* 289 * If we had interrupts enabled, would we 290 * have got an interrupt? 291 */ 292 if (bus_space_read_1(iot, ioh, U14_SINT) & U14_SDIP) 293 u14_intr(sc); 294 if (xs->flags & ITSDONE) 295 return (0); 296 delay(1000); 297 count--; 298 } 299 return (1); 300 } 301 302 /* 303 * Catch an interrupt from the adaptor 304 */ 305 int 306 u14_intr(arg) 307 void *arg; 308 { 309 struct uha_softc *sc = arg; 310 bus_space_tag_t iot = sc->sc_iot; 311 bus_space_handle_t ioh = sc->sc_ioh; 312 struct uha_mscp *mscp; 313 u_char uhastat; 314 u_long mboxval; 315 316 #ifdef UHADEBUG 317 printf("%s: uhaintr ", sc->sc_dev.dv_xname); 318 #endif /*UHADEBUG */ 319 320 if ((bus_space_read_1(iot, ioh, U14_SINT) & U14_SDIP) == 0) 321 return (0); 322 323 for (;;) { 324 /* 325 * First get all the information and then 326 * acknowledge the interrupt 327 */ 328 uhastat = bus_space_read_1(iot, ioh, U14_SINT); 329 mboxval = bus_space_read_4(iot, ioh, U14_ICMPTR); 330 /* XXX Send an ABORT_ACK instead? */ 331 bus_space_write_1(iot, ioh, U14_SINT, U14_ICM_ACK); 332 333 #ifdef UHADEBUG 334 printf("status = 0x%x ", uhastat); 335 #endif /*UHADEBUG*/ 336 337 /* 338 * Process the completed operation 339 */ 340 mscp = uha_mscp_phys_kv(sc, mboxval); 341 if (!mscp) { 342 printf("%s: BAD MSCP RETURNED!\n", 343 sc->sc_dev.dv_xname); 344 continue; /* whatever it was, it'll timeout */ 345 } 346 347 untimeout(uha_timeout, mscp); 348 uha_done(sc, mscp); 349 350 if ((bus_space_read_1(iot, ioh, U14_SINT) & U14_SDIP) == 0) 351 return (1); 352 } 353 } 354 355 void 356 u14_init(sc) 357 struct uha_softc *sc; 358 { 359 bus_space_tag_t iot = sc->sc_iot; 360 bus_space_handle_t ioh = sc->sc_ioh; 361 362 /* make sure interrupts are enabled */ 363 #ifdef UHADEBUG 364 printf("u14_init: lmask=%02x, smask=%02x\n", 365 bus_space_read_1(iot, ioh, U14_LMASK), 366 bus_space_read_1(iot, ioh, U14_SMASK)); 367 #endif 368 bus_space_write_1(iot, ioh, U14_LMASK, 0xd1); /* XXX */ 369 bus_space_write_1(iot, ioh, U14_SMASK, 0x91); /* XXX */ 370 } 371
Indexes created Tue Sep 30 20:09:53 GMT 2025