1 /* $OpenBSD: uha_isa.c,v 1.14 2021/03/07 06:17:04 jsg 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(struct device *parent, void *match, void *aux) 75 { 76 struct isa_attach_args *ia = aux; 77 struct uha_softc sc; 78 bus_space_tag_t iot = ia->ia_iot; 79 bus_space_handle_t ioh; 80 int rv; 81 82 if (bus_space_map(iot, ia->ia_iobase, UHA_ISA_IOSIZE, 0, &ioh)) 83 return (0); 84 85 rv = u14_find(iot, ioh, &sc); 86 87 bus_space_unmap(iot, ioh, UHA_ISA_IOSIZE); 88 89 if (rv) { 90 if (ia->ia_irq != -1 && ia->ia_irq != sc.sc_irq) 91 return (0); 92 if (ia->ia_drq != -1 && ia->ia_drq != sc.sc_drq) 93 return (0); 94 ia->ia_irq = sc.sc_irq; 95 ia->ia_drq = sc.sc_drq; 96 ia->ia_msize = 0; 97 ia->ia_iosize = UHA_ISA_IOSIZE; 98 } 99 return (rv); 100 } 101 102 /* 103 * Attach all the sub-devices we can find 104 */ 105 void 106 uha_isa_attach(struct device *parent, struct device *self, void *aux) 107 { 108 struct isa_attach_args *ia = aux; 109 struct uha_softc *sc = (void *)self; 110 bus_space_tag_t iot = ia->ia_iot; 111 bus_space_handle_t ioh; 112 isa_chipset_tag_t ic = ia->ia_ic; 113 114 printf("\n"); 115 116 if (bus_space_map(iot, ia->ia_iobase, UHA_ISA_IOSIZE, 0, &ioh)) 117 panic("uha_attach: bus_space_map failed!"); 118 119 sc->sc_iot = iot; 120 sc->sc_ioh = ioh; 121 if (!u14_find(iot, ioh, sc)) 122 panic("uha_attach: u14_find failed!"); 123 124 if (sc->sc_drq != -1) 125 isadma_cascade(sc->sc_drq); 126 127 sc->sc_ih = isa_intr_establish(ic, sc->sc_irq, IST_EDGE, IPL_BIO, 128 u14_intr, sc, sc->sc_dev.dv_xname); 129 if (sc->sc_ih == NULL) { 130 printf("%s: couldn't establish interrupt\n", 131 sc->sc_dev.dv_xname); 132 return; 133 } 134 135 /* Save function pointers for later use. */ 136 sc->start_mbox = u14_start_mbox; 137 sc->poll = u14_poll; 138 sc->init = u14_init; 139 140 uha_attach(sc); 141 } 142 143 /* 144 * Start the board, ready for normal operation 145 */ 146 int 147 u14_find(bus_space_tag_t iot, bus_space_handle_t ioh, struct uha_softc *sc) 148 { 149 u_int16_t model, config; 150 int irq, drq; 151 int resetcount = 4000; /* 4 secs? */ 152 153 model = (bus_space_read_1(iot, ioh, U14_ID + 0) << 8) | 154 (bus_space_read_1(iot, ioh, U14_ID + 1) << 0); 155 if ((model & 0xfff0) != 0x5640) 156 return (0); 157 158 config = (bus_space_read_1(iot, ioh, U14_CONFIG + 0) << 8) | 159 (bus_space_read_1(iot, ioh, U14_CONFIG + 1) << 0); 160 161 switch (model & 0x000f) { 162 case 0x0000: 163 switch (config & U14_DMA_MASK) { 164 case U14_DMA_CH5: 165 drq = 5; 166 break; 167 case U14_DMA_CH6: 168 drq = 6; 169 break; 170 case U14_DMA_CH7: 171 drq = 7; 172 break; 173 default: 174 printf("u14_find: illegal drq setting %x\n", 175 config & U14_DMA_MASK); 176 return (0); 177 } 178 break; 179 case 0x0001: 180 /* This is a 34f, and doesn't need an ISA DMA channel. */ 181 drq = -1; 182 break; 183 default: 184 printf("u14_find: unknown model %x\n", model); 185 return (0); 186 } 187 188 switch (config & U14_IRQ_MASK) { 189 case U14_IRQ10: 190 irq = 10; 191 break; 192 case U14_IRQ11: 193 irq = 11; 194 break; 195 case U14_IRQ14: 196 irq = 14; 197 break; 198 case U14_IRQ15: 199 irq = 15; 200 break; 201 default: 202 printf("u14_find: illegal irq setting %x\n", 203 config & U14_IRQ_MASK); 204 return (0); 205 } 206 207 bus_space_write_1(iot, ioh, U14_LINT, UHA_ASRST); 208 209 while (--resetcount) { 210 if (bus_space_read_1(iot, ioh, U14_LINT)) 211 break; 212 delay(1000); /* 1 mSec per loop */ 213 } 214 if (!resetcount) { 215 printf("u14_find: board timed out during reset\n"); 216 return (0); 217 } 218 219 /* if we want to fill in softc, do so now */ 220 if (sc != NULL) { 221 sc->sc_irq = irq; 222 sc->sc_drq = drq; 223 sc->sc_scsi_dev = config & U14_HOSTID_MASK; 224 } 225 226 return (1); 227 } 228 229 /* 230 * Function to send a command out through a mailbox 231 */ 232 void 233 u14_start_mbox(struct uha_softc *sc, struct uha_mscp *mscp) 234 { 235 bus_space_tag_t iot = sc->sc_iot; 236 bus_space_handle_t ioh = sc->sc_ioh; 237 int spincount = 100000; /* 1s should be enough */ 238 239 while (--spincount) { 240 if ((bus_space_read_1(iot, ioh, U14_LINT) & U14_LDIP) == 0) 241 break; 242 delay(100); 243 } 244 if (!spincount) 245 panic("%s: uha_start_mbox, board not responding", 246 sc->sc_dev.dv_xname); 247 248 bus_space_write_4(iot, ioh, U14_OGMPTR, KVTOPHYS(mscp)); 249 if (mscp->flags & MSCP_ABORT) 250 bus_space_write_1(iot, ioh, U14_LINT, U14_ABORT); 251 else 252 bus_space_write_1(iot, ioh, U14_LINT, U14_OGMFULL); 253 254 if ((mscp->xs->flags & SCSI_POLL) == 0) 255 timeout_add_msec(&mscp->xs->stimeout, mscp->timeout); 256 } 257 258 /* 259 * Function to poll for command completion when in poll mode. 260 * 261 * wait = timeout in msec 262 */ 263 int 264 u14_poll(struct uha_softc *sc, struct scsi_xfer *xs, int count) 265 { 266 bus_space_tag_t iot = sc->sc_iot; 267 bus_space_handle_t ioh = sc->sc_ioh; 268 269 while (count) { 270 /* 271 * If we had interrupts enabled, would we 272 * have got an interrupt? 273 */ 274 if (bus_space_read_1(iot, ioh, U14_SINT) & U14_SDIP) 275 u14_intr(sc); 276 if (xs->flags & ITSDONE) 277 return (0); 278 delay(1000); 279 count--; 280 } 281 return (1); 282 } 283 284 /* 285 * Catch an interrupt from the adaptor 286 */ 287 int 288 u14_intr(void *arg) 289 { 290 struct uha_softc *sc = arg; 291 bus_space_tag_t iot = sc->sc_iot; 292 bus_space_handle_t ioh = sc->sc_ioh; 293 struct uha_mscp *mscp; 294 u_char uhastat; 295 u_long mboxval; 296 297 #ifdef UHADEBUG 298 printf("%s: uhaintr ", sc->sc_dev.dv_xname); 299 #endif /*UHADEBUG */ 300 301 if ((bus_space_read_1(iot, ioh, U14_SINT) & U14_SDIP) == 0) 302 return (0); 303 304 for (;;) { 305 /* 306 * First get all the information and then 307 * acknowledge the interrupt 308 */ 309 uhastat = bus_space_read_1(iot, ioh, U14_SINT); 310 mboxval = bus_space_read_4(iot, ioh, U14_ICMPTR); 311 /* XXX Send an ABORT_ACK instead? */ 312 bus_space_write_1(iot, ioh, U14_SINT, U14_ICM_ACK); 313 314 #ifdef UHADEBUG 315 printf("status = 0x%x ", uhastat); 316 #endif /*UHADEBUG*/ 317 318 /* 319 * Process the completed operation 320 */ 321 mscp = uha_mscp_phys_kv(sc, mboxval); 322 if (!mscp) { 323 printf("%s: BAD MSCP RETURNED!\n", 324 sc->sc_dev.dv_xname); 325 continue; /* whatever it was, it'll timeout */ 326 } 327 328 timeout_del(&mscp->xs->stimeout); 329 uha_done(sc, mscp); 330 331 if ((bus_space_read_1(iot, ioh, U14_SINT) & U14_SDIP) == 0) 332 return (1); 333 } 334 } 335 336 void 337 u14_init(struct uha_softc *sc) 338 { 339 bus_space_tag_t iot = sc->sc_iot; 340 bus_space_handle_t ioh = sc->sc_ioh; 341 342 /* make sure interrupts are enabled */ 343 #ifdef UHADEBUG 344 printf("u14_init: lmask=%02x, smask=%02x\n", 345 bus_space_read_1(iot, ioh, U14_LMASK), 346 bus_space_read_1(iot, ioh, U14_SMASK)); 347 #endif 348 bus_space_write_1(iot, ioh, U14_LMASK, 0xd1); /* XXX */ 349 bus_space_write_1(iot, ioh, U14_SMASK, 0x91); /* XXX */ 350 } 351