1 /* $OpenBSD: uha_isa.c,v 1.13 2017/09/08 05:36:52 deraadt Exp $ */ 2 /* $NetBSD: uha_isa.c,v 1.5 1996/10/21 22:41:21 thorpej Exp $ */ 3 4 /* 5 * Copyright (c) 1994, 1996 Charles M. Hannum. 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. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by Charles M. Hannum. 18 * 4. The name of the author may not be used to endorse or promote products 19 * derived from this software without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 #include <sys/param.h> 34 #include <sys/systm.h> 35 #include <sys/device.h> 36 #include <sys/kernel.h> 37 #include <uvm/uvm_extern.h> 38 39 #include <machine/bus.h> 40 #include <machine/intr.h> 41 42 #include <scsi/scsi_all.h> 43 #include <scsi/scsiconf.h> 44 45 #include <dev/isa/isavar.h> 46 #include <dev/isa/isadmavar.h> 47 48 #include <dev/ic/uhareg.h> 49 #include <dev/ic/uhavar.h> 50 51 #define UHA_ISA_IOSIZE 16 52 53 int uha_isa_probe(struct device *, void *, void *); 54 void uha_isa_attach(struct device *, struct device *, void *); 55 56 struct cfattach uha_isa_ca = { 57 sizeof(struct uha_softc), uha_isa_probe, uha_isa_attach 58 }; 59 60 #define KVTOPHYS(x) vtophys((vaddr_t)(x)) 61 62 int u14_find(bus_space_tag_t, bus_space_handle_t, struct uha_softc *); 63 void u14_start_mbox(struct uha_softc *, struct uha_mscp *); 64 int u14_poll(struct uha_softc *, struct scsi_xfer *, int); 65 int u14_intr(void *); 66 void u14_init(struct uha_softc *); 67 68 /* 69 * Check the slots looking for a board we recognise 70 * If we find one, note its address (slot) and call 71 * the actual probe routine to check it out. 72 */ 73 int 74 uha_isa_probe(parent, match, aux) 75 struct device *parent; 76 void *match, *aux; 77 { 78 struct isa_attach_args *ia = aux; 79 struct uha_softc sc; 80 bus_space_tag_t iot = ia->ia_iot; 81 bus_space_handle_t ioh; 82 int rv; 83 84 if (bus_space_map(iot, ia->ia_iobase, UHA_ISA_IOSIZE, 0, &ioh)) 85 return (0); 86 87 rv = u14_find(iot, ioh, &sc); 88 89 bus_space_unmap(iot, ioh, UHA_ISA_IOSIZE); 90 91 if (rv) { 92 if (ia->ia_irq != -1 && ia->ia_irq != sc.sc_irq) 93 return (0); 94 if (ia->ia_drq != -1 && ia->ia_drq != sc.sc_drq) 95 return (0); 96 ia->ia_irq = sc.sc_irq; 97 ia->ia_drq = sc.sc_drq; 98 ia->ia_msize = 0; 99 ia->ia_iosize = UHA_ISA_IOSIZE; 100 } 101 return (rv); 102 } 103 104 /* 105 * Attach all the sub-devices we can find 106 */ 107 void 108 uha_isa_attach(parent, self, aux) 109 struct device *parent, *self; 110 void *aux; 111 { 112 struct isa_attach_args *ia = aux; 113 struct uha_softc *sc = (void *)self; 114 bus_space_tag_t iot = ia->ia_iot; 115 bus_space_handle_t ioh; 116 isa_chipset_tag_t ic = ia->ia_ic; 117 118 printf("\n"); 119 120 if (bus_space_map(iot, ia->ia_iobase, UHA_ISA_IOSIZE, 0, &ioh)) 121 panic("uha_attach: bus_space_map failed!"); 122 123 sc->sc_iot = iot; 124 sc->sc_ioh = ioh; 125 if (!u14_find(iot, ioh, sc)) 126 panic("uha_attach: u14_find failed!"); 127 128 if (sc->sc_drq != -1) 129 isadma_cascade(sc->sc_drq); 130 131 sc->sc_ih = isa_intr_establish(ic, sc->sc_irq, IST_EDGE, IPL_BIO, 132 u14_intr, sc, sc->sc_dev.dv_xname); 133 if (sc->sc_ih == NULL) { 134 printf("%s: couldn't establish interrupt\n", 135 sc->sc_dev.dv_xname); 136 return; 137 } 138 139 /* Save function pointers for later use. */ 140 sc->start_mbox = u14_start_mbox; 141 sc->poll = u14_poll; 142 sc->init = u14_init; 143 144 uha_attach(sc); 145 } 146 147 /* 148 * Start the board, ready for normal operation 149 */ 150 int 151 u14_find(iot, ioh, sc) 152 bus_space_tag_t iot; 153 bus_space_handle_t ioh; 154 struct uha_softc *sc; 155 { 156 u_int16_t model, config; 157 int irq, drq; 158 int resetcount = 4000; /* 4 secs? */ 159 160 model = (bus_space_read_1(iot, ioh, U14_ID + 0) << 8) | 161 (bus_space_read_1(iot, ioh, U14_ID + 1) << 0); 162 if ((model & 0xfff0) != 0x5640) 163 return (0); 164 165 config = (bus_space_read_1(iot, ioh, U14_CONFIG + 0) << 8) | 166 (bus_space_read_1(iot, ioh, U14_CONFIG + 1) << 0); 167 168 switch (model & 0x000f) { 169 case 0x0000: 170 switch (config & U14_DMA_MASK) { 171 case U14_DMA_CH5: 172 drq = 5; 173 break; 174 case U14_DMA_CH6: 175 drq = 6; 176 break; 177 case U14_DMA_CH7: 178 drq = 7; 179 break; 180 default: 181 printf("u14_find: illegal drq setting %x\n", 182 config & U14_DMA_MASK); 183 return (0); 184 } 185 break; 186 case 0x0001: 187 /* This is a 34f, and doesn't need an ISA DMA channel. */ 188 drq = -1; 189 break; 190 default: 191 printf("u14_find: unknown model %x\n", model); 192 return (0); 193 } 194 195 switch (config & U14_IRQ_MASK) { 196 case U14_IRQ10: 197 irq = 10; 198 break; 199 case U14_IRQ11: 200 irq = 11; 201 break; 202 case U14_IRQ14: 203 irq = 14; 204 break; 205 case U14_IRQ15: 206 irq = 15; 207 break; 208 default: 209 printf("u14_find: illegal irq setting %x\n", 210 config & U14_IRQ_MASK); 211 return (0); 212 } 213 214 bus_space_write_1(iot, ioh, U14_LINT, UHA_ASRST); 215 216 while (--resetcount) { 217 if (bus_space_read_1(iot, ioh, U14_LINT)) 218 break; 219 delay(1000); /* 1 mSec per loop */ 220 } 221 if (!resetcount) { 222 printf("u14_find: board timed out during reset\n"); 223 return (0); 224 } 225 226 /* if we want to fill in softc, do so now */ 227 if (sc != NULL) { 228 sc->sc_irq = irq; 229 sc->sc_drq = drq; 230 sc->sc_scsi_dev = config & U14_HOSTID_MASK; 231 } 232 233 return (1); 234 } 235 236 /* 237 * Function to send a command out through a mailbox 238 */ 239 void 240 u14_start_mbox(sc, mscp) 241 struct uha_softc *sc; 242 struct uha_mscp *mscp; 243 { 244 bus_space_tag_t iot = sc->sc_iot; 245 bus_space_handle_t ioh = sc->sc_ioh; 246 int spincount = 100000; /* 1s should be enough */ 247 248 while (--spincount) { 249 if ((bus_space_read_1(iot, ioh, U14_LINT) & U14_LDIP) == 0) 250 break; 251 delay(100); 252 } 253 if (!spincount) 254 panic("%s: uha_start_mbox, board not responding", 255 sc->sc_dev.dv_xname); 256 257 bus_space_write_4(iot, ioh, U14_OGMPTR, KVTOPHYS(mscp)); 258 if (mscp->flags & MSCP_ABORT) 259 bus_space_write_1(iot, ioh, U14_LINT, U14_ABORT); 260 else 261 bus_space_write_1(iot, ioh, U14_LINT, U14_OGMFULL); 262 263 if ((mscp->xs->flags & SCSI_POLL) == 0) 264 timeout_add_msec(&mscp->xs->stimeout, mscp->timeout); 265 } 266 267 /* 268 * Function to poll for command completion when in poll mode. 269 * 270 * wait = timeout in msec 271 */ 272 int 273 u14_poll(sc, xs, count) 274 struct uha_softc *sc; 275 struct scsi_xfer *xs; 276 int count; 277 { 278 bus_space_tag_t iot = sc->sc_iot; 279 bus_space_handle_t ioh = sc->sc_ioh; 280 281 while (count) { 282 /* 283 * If we had interrupts enabled, would we 284 * have got an interrupt? 285 */ 286 if (bus_space_read_1(iot, ioh, U14_SINT) & U14_SDIP) 287 u14_intr(sc); 288 if (xs->flags & ITSDONE) 289 return (0); 290 delay(1000); 291 count--; 292 } 293 return (1); 294 } 295 296 /* 297 * Catch an interrupt from the adaptor 298 */ 299 int 300 u14_intr(arg) 301 void *arg; 302 { 303 struct uha_softc *sc = arg; 304 bus_space_tag_t iot = sc->sc_iot; 305 bus_space_handle_t ioh = sc->sc_ioh; 306 struct uha_mscp *mscp; 307 u_char uhastat; 308 u_long mboxval; 309 310 #ifdef UHADEBUG 311 printf("%s: uhaintr ", sc->sc_dev.dv_xname); 312 #endif /*UHADEBUG */ 313 314 if ((bus_space_read_1(iot, ioh, U14_SINT) & U14_SDIP) == 0) 315 return (0); 316 317 for (;;) { 318 /* 319 * First get all the information and then 320 * acknowledge the interrupt 321 */ 322 uhastat = bus_space_read_1(iot, ioh, U14_SINT); 323 mboxval = bus_space_read_4(iot, ioh, U14_ICMPTR); 324 /* XXX Send an ABORT_ACK instead? */ 325 bus_space_write_1(iot, ioh, U14_SINT, U14_ICM_ACK); 326 327 #ifdef UHADEBUG 328 printf("status = 0x%x ", uhastat); 329 #endif /*UHADEBUG*/ 330 331 /* 332 * Process the completed operation 333 */ 334 mscp = uha_mscp_phys_kv(sc, mboxval); 335 if (!mscp) { 336 printf("%s: BAD MSCP RETURNED!\n", 337 sc->sc_dev.dv_xname); 338 continue; /* whatever it was, it'll timeout */ 339 } 340 341 timeout_del(&mscp->xs->stimeout); 342 uha_done(sc, mscp); 343 344 if ((bus_space_read_1(iot, ioh, U14_SINT) & U14_SDIP) == 0) 345 return (1); 346 } 347 } 348 349 void 350 u14_init(sc) 351 struct uha_softc *sc; 352 { 353 bus_space_tag_t iot = sc->sc_iot; 354 bus_space_handle_t ioh = sc->sc_ioh; 355 356 /* make sure interrupts are enabled */ 357 #ifdef UHADEBUG 358 printf("u14_init: lmask=%02x, smask=%02x\n", 359 bus_space_read_1(iot, ioh, U14_LMASK), 360 bus_space_read_1(iot, ioh, U14_SMASK)); 361 #endif 362 bus_space_write_1(iot, ioh, U14_LMASK, 0xd1); /* XXX */ 363 bus_space_write_1(iot, ioh, U14_SMASK, 0x91); /* XXX */ 364 } 365