uha_eisa.c revision 1.28
1 /* $NetBSD: uha_eisa.c,v 1.28 2008/04/06 08:54:43 cegger Exp $ */ 2 3 /*- 4 * Copyright (c) 1998 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Charles M. Hannum. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 #include <sys/cdefs.h> 40 __KERNEL_RCSID(0, "$NetBSD: uha_eisa.c,v 1.28 2008/04/06 08:54:43 cegger Exp $"); 41 42 #include "opt_ddb.h" 43 44 #include <sys/param.h> 45 #include <sys/systm.h> 46 #include <sys/device.h> 47 #include <sys/kernel.h> 48 #include <sys/proc.h> 49 #include <sys/user.h> 50 51 #include <sys/bus.h> 52 #include <sys/intr.h> 53 54 #include <dev/scsipi/scsi_all.h> 55 #include <dev/scsipi/scsipi_all.h> 56 #include <dev/scsipi/scsiconf.h> 57 58 #include <dev/eisa/eisavar.h> 59 #include <dev/eisa/eisadevs.h> 60 61 #include <dev/ic/uhareg.h> 62 #include <dev/ic/uhavar.h> 63 64 #define UHA_EISA_SLOT_OFFSET 0xc80 65 #define UHA_EISA_IOSIZE 0x020 66 67 static int uha_eisa_match(struct device *, struct cfdata *, void *); 68 static void uha_eisa_attach(struct device *, struct device *, void *); 69 70 CFATTACH_DECL(uha_eisa, sizeof(struct uha_softc), 71 uha_eisa_match, uha_eisa_attach, NULL, NULL); 72 73 #ifndef DDB 74 #define Debugger() panic("should call debugger here (uha_eisa.c)") 75 #endif /* ! DDB */ 76 77 static int u24_find(bus_space_tag_t, bus_space_handle_t, 78 struct uha_probe_data *); 79 static void u24_start_mbox(struct uha_softc *, struct uha_mscp *); 80 static int u24_poll(struct uha_softc *, struct scsipi_xfer *, int); 81 static int u24_intr(void *); 82 static void u24_init(struct uha_softc *); 83 84 /* 85 * Check the slots looking for a board we recognise 86 * If we find one, note it's address (slot) and call 87 * the actual probe routine to check it out. 88 */ 89 static int 90 uha_eisa_match(struct device *parent, struct cfdata *match, 91 void *aux) 92 { 93 struct eisa_attach_args *ea = aux; 94 bus_space_tag_t iot = ea->ea_iot; 95 bus_space_handle_t ioh; 96 int rv; 97 98 /* must match one of our known ID strings */ 99 if (strncmp(ea->ea_idstring, "USC024", 6)) 100 return (0); 101 102 if (bus_space_map(iot, EISA_SLOT_ADDR(ea->ea_slot) + 103 UHA_EISA_SLOT_OFFSET, UHA_EISA_IOSIZE, 0, &ioh)) 104 return (0); 105 106 rv = u24_find(iot, ioh, NULL); 107 108 bus_space_unmap(iot, ioh, UHA_EISA_IOSIZE); 109 110 return (rv); 111 } 112 113 /* 114 * Attach all the sub-devices we can find 115 */ 116 static void 117 uha_eisa_attach(struct device *parent, struct device *self, void *aux) 118 { 119 struct eisa_attach_args *ea = aux; 120 struct uha_softc *sc = device_private(self); 121 bus_space_tag_t iot = ea->ea_iot; 122 bus_dma_tag_t dmat = ea->ea_dmat; 123 bus_space_handle_t ioh; 124 struct uha_probe_data upd; 125 eisa_chipset_tag_t ec = ea->ea_ec; 126 eisa_intr_handle_t ih; 127 const char *model, *intrstr; 128 129 if (!strncmp(ea->ea_idstring, "USC024", 6)) 130 model = EISA_PRODUCT_USC0240; 131 else 132 model = "unknown model!"; 133 printf(": %s\n", model); 134 135 if (bus_space_map(iot, EISA_SLOT_ADDR(ea->ea_slot) + 136 UHA_EISA_SLOT_OFFSET, UHA_EISA_IOSIZE, 0, &ioh)) 137 panic("uha_eisa_attach: could not map I/O addresses"); 138 139 sc->sc_iot = iot; 140 sc->sc_ioh = ioh; 141 sc->sc_dmat = dmat; 142 if (!u24_find(iot, ioh, &upd)) 143 panic("uha_eisa_attach: u24_find failed!"); 144 145 sc->sc_dmaflags = 0; 146 147 if (eisa_intr_map(ec, upd.sc_irq, &ih)) { 148 aprint_error_dev(&sc->sc_dev, "couldn't map interrupt (%d)\n", 149 upd.sc_irq); 150 return; 151 } 152 intrstr = eisa_intr_string(ec, ih); 153 sc->sc_ih = eisa_intr_establish(ec, ih, IST_LEVEL, IPL_BIO, 154 u24_intr, sc); 155 if (sc->sc_ih == NULL) { 156 aprint_error_dev(&sc->sc_dev, "couldn't establish interrupt"); 157 if (intrstr != NULL) 158 printf(" at %s", intrstr); 159 printf("\n"); 160 return; 161 } 162 printf("%s: interrupting at %s\n", device_xname(&sc->sc_dev), intrstr); 163 164 /* Save function pointers for later use. */ 165 sc->start_mbox = u24_start_mbox; 166 sc->poll = u24_poll; 167 sc->init = u24_init; 168 169 uha_attach(sc, &upd); 170 } 171 172 static int 173 u24_find(bus_space_tag_t iot, bus_space_handle_t ioh, struct uha_probe_data *sc) 174 { 175 u_int8_t config0, config1, config2; 176 int irq, drq; 177 int resetcount = 4000; /* 4 secs? */ 178 179 config0 = bus_space_read_1(iot, ioh, U24_CONFIG + 0); 180 config1 = bus_space_read_1(iot, ioh, U24_CONFIG + 1); 181 config2 = bus_space_read_1(iot, ioh, U24_CONFIG + 2); 182 if ((config0 & U24_MAGIC1) == 0 || 183 (config1 & U24_MAGIC2) == 0) 184 return (0); 185 186 drq = -1; 187 188 switch (config0 & U24_IRQ_MASK) { 189 case U24_IRQ10: 190 irq = 10; 191 break; 192 case U24_IRQ11: 193 irq = 11; 194 break; 195 case U24_IRQ14: 196 irq = 14; 197 break; 198 case U24_IRQ15: 199 irq = 15; 200 break; 201 default: 202 printf("u24_find: illegal irq setting %x\n", 203 config0 & U24_IRQ_MASK); 204 return (0); 205 } 206 207 bus_space_write_1(iot, ioh, U24_LINT, UHA_ASRST); 208 209 while (--resetcount) { 210 if (bus_space_read_1(iot, ioh, U24_LINT)) 211 break; 212 delay(1000); /* 1 mSec per loop */ 213 } 214 if (!resetcount) { 215 printf("u24_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) { 221 sc->sc_irq = irq; 222 sc->sc_drq = drq; 223 sc->sc_scsi_dev = config2 & U24_HOSTID_MASK; 224 } 225 226 return (1); 227 } 228 229 static void 230 u24_start_mbox(struct uha_softc *sc, struct uha_mscp *mscp) 231 { 232 bus_space_tag_t iot = sc->sc_iot; 233 bus_space_handle_t ioh = sc->sc_ioh; 234 int spincount = 100000; /* 1s should be enough */ 235 236 while (--spincount) { 237 if ((bus_space_read_1(iot, ioh, U24_LINT) & U24_LDIP) == 0) 238 break; 239 delay(100); 240 } 241 if (!spincount) { 242 aprint_error_dev(&sc->sc_dev, "uha_start_mbox, board not responding\n"); 243 Debugger(); 244 } 245 246 bus_space_write_4(iot, ioh, U24_OGMPTR, 247 sc->sc_dmamap_mscp->dm_segs[0].ds_addr + UHA_MSCP_OFF(mscp)); 248 if (mscp->flags & MSCP_ABORT) 249 bus_space_write_1(iot, ioh, U24_OGMCMD, 0x80); 250 else 251 bus_space_write_1(iot, ioh, U24_OGMCMD, 0x01); 252 bus_space_write_1(iot, ioh, U24_LINT, U24_OGMFULL); 253 254 if ((mscp->xs->xs_control & XS_CTL_POLL) == 0) 255 callout_reset(&mscp->xs->xs_callout, 256 mstohz(mscp->timeout), uha_timeout, mscp); 257 } 258 259 static int 260 u24_poll(struct uha_softc *sc, struct scsipi_xfer *xs, int count) 261 { 262 bus_space_tag_t iot = sc->sc_iot; 263 bus_space_handle_t ioh = sc->sc_ioh; 264 265 while (count) { 266 /* 267 * If we had interrupts enabled, would we 268 * have got an interrupt? 269 */ 270 if (bus_space_read_1(iot, ioh, U24_SINT) & U24_SDIP) 271 u24_intr(sc); 272 if (xs->xs_status & XS_STS_DONE) 273 return (0); 274 delay(1000); 275 count--; 276 } 277 return (1); 278 } 279 280 static int 281 u24_intr(void *arg) 282 { 283 struct uha_softc *sc = arg; 284 bus_space_tag_t iot = sc->sc_iot; 285 bus_space_handle_t ioh = sc->sc_ioh; 286 struct uha_mscp *mscp; 287 u_char uhastat; 288 u_long mboxval; 289 290 #ifdef UHADEBUG 291 printf("%s: uhaintr ", device_xname(&sc->sc_dev)); 292 #endif /*UHADEBUG */ 293 294 if ((bus_space_read_1(iot, ioh, U24_SINT) & U24_SDIP) == 0) 295 return (0); 296 297 for (;;) { 298 /* 299 * First get all the information and then 300 * acknowledge the interrupt 301 */ 302 uhastat = bus_space_read_1(iot, ioh, U24_SINT); 303 mboxval = bus_space_read_4(iot, ioh, U24_ICMPTR); 304 bus_space_write_1(iot, ioh, U24_SINT, U24_ICM_ACK); 305 bus_space_write_1(iot, ioh, U24_ICMCMD, 0); 306 307 #ifdef UHADEBUG 308 printf("status = 0x%x ", uhastat); 309 #endif /*UHADEBUG*/ 310 311 /* 312 * Process the completed operation 313 */ 314 mscp = uha_mscp_phys_kv(sc, mboxval); 315 if (!mscp) { 316 printf("%s: BAD MSCP RETURNED!\n", 317 device_xname(&sc->sc_dev)); 318 continue; /* whatever it was, it'll timeout */ 319 } 320 callout_stop(&mscp->xs->xs_callout); 321 uha_done(sc, mscp); 322 323 if ((bus_space_read_1(iot, ioh, U24_SINT) & U24_SDIP) == 0) 324 return (1); 325 } 326 } 327 328 static void 329 u24_init(struct uha_softc *sc) 330 { 331 bus_space_tag_t iot = sc->sc_iot; 332 bus_space_handle_t ioh = sc->sc_ioh; 333 334 /* free OGM and ICM */ 335 bus_space_write_1(iot, ioh, U24_OGMCMD, 0); 336 bus_space_write_1(iot, ioh, U24_ICMCMD, 0); 337 /* make sure interrupts are enabled */ 338 #ifdef UHADEBUG 339 printf("u24_init: lmask=%02x, smask=%02x\n", 340 bus_space_read_1(iot, ioh, U24_LMASK), 341 bus_space_read_1(iot, ioh, U24_SMASK)); 342 #endif 343 bus_space_write_1(iot, ioh, U24_LMASK, 0xd2); /* XXX */ 344 bus_space_write_1(iot, ioh, U24_SMASK, 0x92); /* XXX */ 345 } 346
Indexes created Tue Sep 30 07:10:03 GMT 2025