uha_isa.c revision 1.7
1 /* $NetBSD: uha_isa.c,v 1.7 1997/03/29 02:32:33 mycroft Exp $ */ 2 3 /* 4 * Copyright (c) 1994, 1996, 1997 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, 67 struct uha_probe_data *)); 68 void u14_start_mbox __P((struct uha_softc *, struct uha_mscp *)); 69 int u14_poll __P((struct uha_softc *, struct scsi_xfer *, int)); 70 int u14_intr __P((void *)); 71 void u14_init __P((struct uha_softc *)); 72 73 /* 74 * Check the slots looking for a board we recognise 75 * If we find one, note it's address (slot) and call 76 * the actual probe routine to check it out. 77 */ 78 int 79 uha_isa_probe(parent, match, aux) 80 struct device *parent; 81 void *match, *aux; 82 { 83 struct isa_attach_args *ia = aux; 84 bus_space_tag_t iot = ia->ia_iot; 85 bus_space_handle_t ioh; 86 struct uha_probe_data upd; 87 int rv; 88 89 if (bus_space_map(iot, ia->ia_iobase, UHA_ISA_IOSIZE, 0, &ioh)) 90 return (0); 91 92 rv = u14_find(iot, ioh, &upd); 93 94 bus_space_unmap(iot, ioh, UHA_ISA_IOSIZE); 95 96 if (rv) { 97 if (ia->ia_irq != -1 && ia->ia_irq != upd.sc_irq) 98 return (0); 99 if (ia->ia_drq != -1 && ia->ia_drq != upd.sc_drq) 100 return (0); 101 ia->ia_irq = upd.sc_irq; 102 ia->ia_drq = upd.sc_drq; 103 ia->ia_msize = 0; 104 ia->ia_iosize = UHA_ISA_IOSIZE; 105 } 106 return (rv); 107 } 108 109 /* 110 * Attach all the sub-devices we can find 111 */ 112 void 113 uha_isa_attach(parent, self, aux) 114 struct device *parent, *self; 115 void *aux; 116 { 117 struct isa_attach_args *ia = aux; 118 struct uha_softc *sc = (void *)self; 119 bus_space_tag_t iot = ia->ia_iot; 120 bus_space_handle_t ioh; 121 struct uha_probe_data upd; 122 isa_chipset_tag_t ic = ia->ia_ic; 123 124 printf("\n"); 125 126 if (bus_space_map(iot, ia->ia_iobase, UHA_ISA_IOSIZE, 0, &ioh)) 127 panic("uha_isa_attach: bus_space_map failed!"); 128 129 sc->sc_iot = iot; 130 sc->sc_ioh = ioh; 131 if (!u14_find(iot, ioh, &upd)) 132 panic("uha_isa_attach: u14_find failed!"); 133 134 if (upd.sc_drq != -1) 135 isa_dmacascade(upd.sc_drq); 136 137 sc->sc_ih = isa_intr_establish(ic, upd.sc_irq, IST_EDGE, IPL_BIO, 138 u14_intr, sc); 139 if (sc->sc_ih == NULL) { 140 printf("%s: couldn't establish interrupt\n", 141 sc->sc_dev.dv_xname); 142 return; 143 } 144 145 /* Save function pointers for later use. */ 146 sc->start_mbox = u14_start_mbox; 147 sc->poll = u14_poll; 148 sc->init = u14_init; 149 150 uha_attach(sc, &upd); 151 } 152 153 /* 154 * Start the board, ready for normal operation 155 */ 156 int 157 u14_find(iot, ioh, sc) 158 bus_space_tag_t iot; 159 bus_space_handle_t ioh; 160 struct uha_probe_data *sc; 161 { 162 u_int16_t model, config; 163 int irq, drq; 164 int resetcount = 4000; /* 4 secs? */ 165 166 model = (bus_space_read_1(iot, ioh, U14_ID + 0) << 8) | 167 (bus_space_read_1(iot, ioh, U14_ID + 1) << 0); 168 if ((model & 0xfff0) != 0x5640) 169 return (0); 170 171 config = (bus_space_read_1(iot, ioh, U14_CONFIG + 0) << 8) | 172 (bus_space_read_1(iot, ioh, U14_CONFIG + 1) << 0); 173 174 switch (model & 0x000f) { 175 case 0x0000: 176 switch (config & U14_DMA_MASK) { 177 case U14_DMA_CH5: 178 drq = 5; 179 break; 180 case U14_DMA_CH6: 181 drq = 6; 182 break; 183 case U14_DMA_CH7: 184 drq = 7; 185 break; 186 default: 187 printf("u14_find: illegal drq setting %x\n", 188 config & U14_DMA_MASK); 189 return (0); 190 } 191 break; 192 case 0x0001: 193 /* This is a 34f, and doesn't need an ISA DMA channel. */ 194 drq = -1; 195 break; 196 default: 197 printf("u14_find: unknown model %x\n", model); 198 return (0); 199 } 200 201 switch (config & U14_IRQ_MASK) { 202 case U14_IRQ10: 203 irq = 10; 204 break; 205 case U14_IRQ11: 206 irq = 11; 207 break; 208 case U14_IRQ14: 209 irq = 14; 210 break; 211 case U14_IRQ15: 212 irq = 15; 213 break; 214 default: 215 printf("u14_find: illegal irq setting %x\n", 216 config & U14_IRQ_MASK); 217 return (0); 218 } 219 220 bus_space_write_1(iot, ioh, U14_LINT, UHA_ASRST); 221 222 while (--resetcount) { 223 if (bus_space_read_1(iot, ioh, U14_LINT)) 224 break; 225 delay(1000); /* 1 mSec per loop */ 226 } 227 if (!resetcount) { 228 printf("u14_find: board timed out during reset\n"); 229 return (0); 230 } 231 232 /* if we want to fill in softc, do so now */ 233 if (sc) { 234 sc->sc_irq = irq; 235 sc->sc_drq = drq; 236 sc->sc_scsi_dev = config & U14_HOSTID_MASK; 237 } 238 239 return (1); 240 } 241 242 /* 243 * Function to send a command out through a mailbox 244 */ 245 void 246 u14_start_mbox(sc, mscp) 247 struct uha_softc *sc; 248 struct uha_mscp *mscp; 249 { 250 bus_space_tag_t iot = sc->sc_iot; 251 bus_space_handle_t ioh = sc->sc_ioh; 252 int spincount = 100000; /* 1s should be enough */ 253 254 while (--spincount) { 255 if ((bus_space_read_1(iot, ioh, U14_LINT) & U14_LDIP) == 0) 256 break; 257 delay(100); 258 } 259 if (!spincount) { 260 printf("%s: uha_start_mbox, board not responding\n", 261 sc->sc_dev.dv_xname); 262 Debugger(); 263 } 264 265 bus_space_write_4(iot, ioh, U14_OGMPTR, KVTOPHYS(mscp)); 266 if (mscp->flags & MSCP_ABORT) 267 bus_space_write_1(iot, ioh, U14_LINT, U14_ABORT); 268 else 269 bus_space_write_1(iot, ioh, U14_LINT, U14_OGMFULL); 270 271 if ((mscp->xs->flags & SCSI_POLL) == 0) 272 timeout(uha_timeout, mscp, (mscp->timeout * hz) / 1000); 273 } 274 275 /* 276 * Function to poll for command completion when in poll mode. 277 * 278 * wait = timeout in msec 279 */ 280 int 281 u14_poll(sc, xs, count) 282 struct uha_softc *sc; 283 struct scsi_xfer *xs; 284 int count; 285 { 286 bus_space_tag_t iot = sc->sc_iot; 287 bus_space_handle_t ioh = sc->sc_ioh; 288 289 while (count) { 290 /* 291 * If we had interrupts enabled, would we 292 * have got an interrupt? 293 */ 294 if (bus_space_read_1(iot, ioh, U14_SINT) & U14_SDIP) 295 u14_intr(sc); 296 if (xs->flags & ITSDONE) 297 return (0); 298 delay(1000); 299 count--; 300 } 301 return (1); 302 } 303 304 /* 305 * Catch an interrupt from the adaptor 306 */ 307 int 308 u14_intr(arg) 309 void *arg; 310 { 311 struct uha_softc *sc = arg; 312 bus_space_tag_t iot = sc->sc_iot; 313 bus_space_handle_t ioh = sc->sc_ioh; 314 struct uha_mscp *mscp; 315 u_char uhastat; 316 u_long mboxval; 317 318 #ifdef UHADEBUG 319 printf("%s: uhaintr ", sc->sc_dev.dv_xname); 320 #endif /*UHADEBUG */ 321 322 if ((bus_space_read_1(iot, ioh, U14_SINT) & U14_SDIP) == 0) 323 return (0); 324 325 for (;;) { 326 /* 327 * First get all the information and then 328 * acknowledge the interrupt 329 */ 330 uhastat = bus_space_read_1(iot, ioh, U14_SINT); 331 mboxval = bus_space_read_4(iot, ioh, U14_ICMPTR); 332 /* XXX Send an ABORT_ACK instead? */ 333 bus_space_write_1(iot, ioh, U14_SINT, U14_ICM_ACK); 334 335 #ifdef UHADEBUG 336 printf("status = 0x%x ", uhastat); 337 #endif /*UHADEBUG*/ 338 339 /* 340 * Process the completed operation 341 */ 342 mscp = uha_mscp_phys_kv(sc, mboxval); 343 if (!mscp) { 344 printf("%s: BAD MSCP RETURNED!\n", 345 sc->sc_dev.dv_xname); 346 continue; /* whatever it was, it'll timeout */ 347 } 348 349 untimeout(uha_timeout, mscp); 350 uha_done(sc, mscp); 351 352 if ((bus_space_read_1(iot, ioh, U14_SINT) & U14_SDIP) == 0) 353 return (1); 354 } 355 } 356 357 void 358 u14_init(sc) 359 struct uha_softc *sc; 360 { 361 bus_space_tag_t iot = sc->sc_iot; 362 bus_space_handle_t ioh = sc->sc_ioh; 363 364 /* make sure interrupts are enabled */ 365 #ifdef UHADEBUG 366 printf("u14_init: lmask=%02x, smask=%02x\n", 367 bus_space_read_1(iot, ioh, U14_LMASK), 368 bus_space_read_1(iot, ioh, U14_SMASK)); 369 #endif 370 bus_space_write_1(iot, ioh, U14_LMASK, 0xd1); /* XXX */ 371 bus_space_write_1(iot, ioh, U14_SMASK, 0x91); /* XXX */ 372 } 373
Indexes created Tue Sep 30 20:09:53 GMT 2025