uha_eisa.c revision 1.34
1 /* $NetBSD: uha_eisa.c,v 1.34 2012/10/27 17:18:16 chs 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 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __KERNEL_RCSID(0, "$NetBSD: uha_eisa.c,v 1.34 2012/10/27 17:18:16 chs Exp $"); 34 35 #include "opt_ddb.h" 36 37 #include <sys/param.h> 38 #include <sys/systm.h> 39 #include <sys/device.h> 40 #include <sys/kernel.h> 41 #include <sys/proc.h> 42 43 #include <sys/bus.h> 44 #include <sys/intr.h> 45 46 #include <dev/scsipi/scsi_all.h> 47 #include <dev/scsipi/scsipi_all.h> 48 #include <dev/scsipi/scsiconf.h> 49 50 #include <dev/eisa/eisavar.h> 51 #include <dev/eisa/eisadevs.h> 52 53 #include <dev/ic/uhareg.h> 54 #include <dev/ic/uhavar.h> 55 56 #define UHA_EISA_SLOT_OFFSET 0xc80 57 #define UHA_EISA_IOSIZE 0x020 58 59 static int uha_eisa_match(device_t, cfdata_t, void *); 60 static void uha_eisa_attach(device_t, device_t, void *); 61 62 CFATTACH_DECL_NEW(uha_eisa, sizeof(struct uha_softc), 63 uha_eisa_match, uha_eisa_attach, NULL, NULL); 64 65 #ifndef DDB 66 #define Debugger() panic("should call debugger here (uha_eisa.c)") 67 #endif /* ! DDB */ 68 69 static int u24_find(bus_space_tag_t, bus_space_handle_t, 70 struct uha_probe_data *); 71 static void u24_start_mbox(struct uha_softc *, struct uha_mscp *); 72 static int u24_poll(struct uha_softc *, struct scsipi_xfer *, int); 73 static int u24_intr(void *); 74 static void u24_init(struct uha_softc *); 75 76 /* 77 * Check the slots looking for a board we recognise 78 * If we find one, note it's address (slot) and call 79 * the actual probe routine to check it out. 80 */ 81 static int 82 uha_eisa_match(device_t parent, cfdata_t match, 83 void *aux) 84 { 85 struct eisa_attach_args *ea = aux; 86 bus_space_tag_t iot = ea->ea_iot; 87 bus_space_handle_t ioh; 88 int rv; 89 90 /* must match one of our known ID strings */ 91 if (strncmp(ea->ea_idstring, "USC024", 6)) 92 return (0); 93 94 if (bus_space_map(iot, EISA_SLOT_ADDR(ea->ea_slot) + 95 UHA_EISA_SLOT_OFFSET, UHA_EISA_IOSIZE, 0, &ioh)) 96 return (0); 97 98 rv = u24_find(iot, ioh, NULL); 99 100 bus_space_unmap(iot, ioh, UHA_EISA_IOSIZE); 101 102 return (rv); 103 } 104 105 /* 106 * Attach all the sub-devices we can find 107 */ 108 static void 109 uha_eisa_attach(device_t parent, device_t self, void *aux) 110 { 111 struct eisa_attach_args *ea = aux; 112 struct uha_softc *sc = device_private(self); 113 bus_space_tag_t iot = ea->ea_iot; 114 bus_dma_tag_t dmat = ea->ea_dmat; 115 bus_space_handle_t ioh; 116 struct uha_probe_data upd; 117 eisa_chipset_tag_t ec = ea->ea_ec; 118 eisa_intr_handle_t ih; 119 const char *model, *intrstr; 120 121 if (!strncmp(ea->ea_idstring, "USC024", 6)) 122 model = EISA_PRODUCT_USC0240; 123 else 124 model = "unknown model!"; 125 printf(": %s\n", model); 126 127 if (bus_space_map(iot, EISA_SLOT_ADDR(ea->ea_slot) + 128 UHA_EISA_SLOT_OFFSET, UHA_EISA_IOSIZE, 0, &ioh)) 129 panic("uha_eisa_attach: could not map I/O addresses"); 130 131 sc->sc_dev = self; 132 sc->sc_iot = iot; 133 sc->sc_ioh = ioh; 134 sc->sc_dmat = dmat; 135 if (!u24_find(iot, ioh, &upd)) 136 panic("uha_eisa_attach: u24_find failed!"); 137 138 sc->sc_dmaflags = 0; 139 140 if (eisa_intr_map(ec, upd.sc_irq, &ih)) { 141 aprint_error_dev(sc->sc_dev, "couldn't map interrupt (%d)\n", 142 upd.sc_irq); 143 return; 144 } 145 intrstr = eisa_intr_string(ec, ih); 146 sc->sc_ih = eisa_intr_establish(ec, ih, IST_LEVEL, IPL_BIO, 147 u24_intr, sc); 148 if (sc->sc_ih == NULL) { 149 aprint_error_dev(sc->sc_dev, "couldn't establish interrupt"); 150 if (intrstr != NULL) 151 aprint_error(" at %s", intrstr); 152 aprint_error("\n"); 153 return; 154 } 155 aprint_normal_dev(sc->sc_dev, "interrupting at %s\n", intrstr); 156 157 /* Save function pointers for later use. */ 158 sc->start_mbox = u24_start_mbox; 159 sc->poll = u24_poll; 160 sc->init = u24_init; 161 162 uha_attach(sc, &upd); 163 } 164 165 static int 166 u24_find(bus_space_tag_t iot, bus_space_handle_t ioh, struct uha_probe_data *sc) 167 { 168 u_int8_t config0, config1, config2; 169 int irq, drq; 170 int resetcount = 4000; /* 4 secs? */ 171 172 config0 = bus_space_read_1(iot, ioh, U24_CONFIG + 0); 173 config1 = bus_space_read_1(iot, ioh, U24_CONFIG + 1); 174 config2 = bus_space_read_1(iot, ioh, U24_CONFIG + 2); 175 if ((config0 & U24_MAGIC1) == 0 || 176 (config1 & U24_MAGIC2) == 0) 177 return (0); 178 179 drq = -1; 180 181 switch (config0 & U24_IRQ_MASK) { 182 case U24_IRQ10: 183 irq = 10; 184 break; 185 case U24_IRQ11: 186 irq = 11; 187 break; 188 case U24_IRQ14: 189 irq = 14; 190 break; 191 case U24_IRQ15: 192 irq = 15; 193 break; 194 default: 195 printf("u24_find: illegal irq setting %x\n", 196 config0 & U24_IRQ_MASK); 197 return (0); 198 } 199 200 bus_space_write_1(iot, ioh, U24_LINT, UHA_ASRST); 201 202 while (--resetcount) { 203 if (bus_space_read_1(iot, ioh, U24_LINT)) 204 break; 205 delay(1000); /* 1 mSec per loop */ 206 } 207 if (!resetcount) { 208 printf("u24_find: board timed out during reset\n"); 209 return (0); 210 } 211 212 /* if we want to fill in softc, do so now */ 213 if (sc) { 214 sc->sc_irq = irq; 215 sc->sc_drq = drq; 216 sc->sc_scsi_dev = config2 & U24_HOSTID_MASK; 217 } 218 219 return (1); 220 } 221 222 static void 223 u24_start_mbox(struct uha_softc *sc, struct uha_mscp *mscp) 224 { 225 bus_space_tag_t iot = sc->sc_iot; 226 bus_space_handle_t ioh = sc->sc_ioh; 227 int spincount = 100000; /* 1s should be enough */ 228 229 while (--spincount) { 230 if ((bus_space_read_1(iot, ioh, U24_LINT) & U24_LDIP) == 0) 231 break; 232 delay(100); 233 } 234 if (!spincount) { 235 aprint_error_dev(sc->sc_dev, "uha_start_mbox, board not responding\n"); 236 Debugger(); 237 } 238 239 bus_space_write_4(iot, ioh, U24_OGMPTR, 240 sc->sc_dmamap_mscp->dm_segs[0].ds_addr + UHA_MSCP_OFF(mscp)); 241 if (mscp->flags & MSCP_ABORT) 242 bus_space_write_1(iot, ioh, U24_OGMCMD, 0x80); 243 else 244 bus_space_write_1(iot, ioh, U24_OGMCMD, 0x01); 245 bus_space_write_1(iot, ioh, U24_LINT, U24_OGMFULL); 246 247 if ((mscp->xs->xs_control & XS_CTL_POLL) == 0) 248 callout_reset(&mscp->xs->xs_callout, 249 mstohz(mscp->timeout), uha_timeout, mscp); 250 } 251 252 static int 253 u24_poll(struct uha_softc *sc, struct scsipi_xfer *xs, int count) 254 { 255 bus_space_tag_t iot = sc->sc_iot; 256 bus_space_handle_t ioh = sc->sc_ioh; 257 258 while (count) { 259 /* 260 * If we had interrupts enabled, would we 261 * have got an interrupt? 262 */ 263 if (bus_space_read_1(iot, ioh, U24_SINT) & U24_SDIP) 264 u24_intr(sc); 265 if (xs->xs_status & XS_STS_DONE) 266 return (0); 267 delay(1000); 268 count--; 269 } 270 return (1); 271 } 272 273 static int 274 u24_intr(void *arg) 275 { 276 struct uha_softc *sc = arg; 277 bus_space_tag_t iot = sc->sc_iot; 278 bus_space_handle_t ioh = sc->sc_ioh; 279 struct uha_mscp *mscp; 280 u_char uhastat; 281 u_long mboxval; 282 283 #ifdef UHADEBUG 284 printf("%s: uhaintr ", device_xname(sc->sc_dev)); 285 #endif /*UHADEBUG */ 286 287 if ((bus_space_read_1(iot, ioh, U24_SINT) & U24_SDIP) == 0) 288 return (0); 289 290 for (;;) { 291 /* 292 * First get all the information and then 293 * acknowledge the interrupt 294 */ 295 uhastat = bus_space_read_1(iot, ioh, U24_SINT); 296 mboxval = bus_space_read_4(iot, ioh, U24_ICMPTR); 297 bus_space_write_1(iot, ioh, U24_SINT, U24_ICM_ACK); 298 bus_space_write_1(iot, ioh, U24_ICMCMD, 0); 299 300 #ifdef UHADEBUG 301 printf("status = 0x%x ", uhastat); 302 #endif /*UHADEBUG*/ 303 304 /* 305 * Process the completed operation 306 */ 307 mscp = uha_mscp_phys_kv(sc, mboxval); 308 if (!mscp) { 309 printf("%s: BAD MSCP RETURNED!\n", 310 device_xname(sc->sc_dev)); 311 continue; /* whatever it was, it'll timeout */ 312 } 313 callout_stop(&mscp->xs->xs_callout); 314 uha_done(sc, mscp); 315 316 if ((bus_space_read_1(iot, ioh, U24_SINT) & U24_SDIP) == 0) 317 return (1); 318 } 319 } 320 321 static void 322 u24_init(struct uha_softc *sc) 323 { 324 bus_space_tag_t iot = sc->sc_iot; 325 bus_space_handle_t ioh = sc->sc_ioh; 326 327 /* free OGM and ICM */ 328 bus_space_write_1(iot, ioh, U24_OGMCMD, 0); 329 bus_space_write_1(iot, ioh, U24_ICMCMD, 0); 330 /* make sure interrupts are enabled */ 331 #ifdef UHADEBUG 332 printf("u24_init: lmask=%02x, smask=%02x\n", 333 bus_space_read_1(iot, ioh, U24_LMASK), 334 bus_space_read_1(iot, ioh, U24_SMASK)); 335 #endif 336 bus_space_write_1(iot, ioh, U24_LMASK, 0xd2); /* XXX */ 337 bus_space_write_1(iot, ioh, U24_SMASK, 0x92); /* XXX */ 338 } 339
Indexes created Tue Sep 30 11:09:46 GMT 2025