uha_eisa.c revision 1.36
1 /* $NetBSD: uha_eisa.c,v 1.36 2014/03/29 19:28:24 christos 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 1.36 2014/03/29 19:28:24 christos 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 char intrbuf[EISA_INTRSTR_LEN]; 121 122 if (!strncmp(ea->ea_idstring, "USC024", 6)) 123 model = EISA_PRODUCT_USC0240; 124 else 125 model = "unknown model!"; 126 printf(": %s\n", model); 127 128 if (bus_space_map(iot, EISA_SLOT_ADDR(ea->ea_slot) + 129 UHA_EISA_SLOT_OFFSET, UHA_EISA_IOSIZE, 0, &ioh)) 130 panic("uha_eisa_attach: could not map I/O addresses"); 131 132 sc->sc_dev = self; 133 sc->sc_iot = iot; 134 sc->sc_ioh = ioh; 135 sc->sc_dmat = dmat; 136 if (!u24_find(iot, ioh, &upd)) 137 panic("uha_eisa_attach: u24_find failed!"); 138 139 sc->sc_dmaflags = 0; 140 141 if (eisa_intr_map(ec, upd.sc_irq, &ih)) { 142 aprint_error_dev(sc->sc_dev, "couldn't map interrupt (%d)\n", 143 upd.sc_irq); 144 return; 145 } 146 intrstr = eisa_intr_string(ec, ih, intrbuf, sizeof(intrbuf)); 147 sc->sc_ih = eisa_intr_establish(ec, ih, IST_LEVEL, IPL_BIO, 148 u24_intr, sc); 149 if (sc->sc_ih == NULL) { 150 aprint_error_dev(sc->sc_dev, "couldn't establish interrupt"); 151 if (intrstr != NULL) 152 aprint_error(" at %s", intrstr); 153 aprint_error("\n"); 154 return; 155 } 156 aprint_normal_dev(sc->sc_dev, "interrupting at %s\n", intrstr); 157 158 /* Save function pointers for later use. */ 159 sc->start_mbox = u24_start_mbox; 160 sc->poll = u24_poll; 161 sc->init = u24_init; 162 163 uha_attach(sc, &upd); 164 } 165 166 static int 167 u24_find(bus_space_tag_t iot, bus_space_handle_t ioh, struct uha_probe_data *sc) 168 { 169 u_int8_t config0, config1, config2; 170 int irq, drq; 171 int resetcount = 4000; /* 4 secs? */ 172 173 config0 = bus_space_read_1(iot, ioh, U24_CONFIG + 0); 174 config1 = bus_space_read_1(iot, ioh, U24_CONFIG + 1); 175 config2 = bus_space_read_1(iot, ioh, U24_CONFIG + 2); 176 if ((config0 & U24_MAGIC1) == 0 || 177 (config1 & U24_MAGIC2) == 0) 178 return (0); 179 180 drq = -1; 181 182 switch (config0 & U24_IRQ_MASK) { 183 case U24_IRQ10: 184 irq = 10; 185 break; 186 case U24_IRQ11: 187 irq = 11; 188 break; 189 case U24_IRQ14: 190 irq = 14; 191 break; 192 case U24_IRQ15: 193 irq = 15; 194 break; 195 default: 196 printf("u24_find: illegal irq setting %x\n", 197 config0 & U24_IRQ_MASK); 198 return (0); 199 } 200 201 bus_space_write_1(iot, ioh, U24_LINT, UHA_ASRST); 202 203 while (--resetcount) { 204 if (bus_space_read_1(iot, ioh, U24_LINT)) 205 break; 206 delay(1000); /* 1 mSec per loop */ 207 } 208 if (!resetcount) { 209 printf("u24_find: board timed out during reset\n"); 210 return (0); 211 } 212 213 /* if we want to fill in softc, do so now */ 214 if (sc) { 215 sc->sc_irq = irq; 216 sc->sc_drq = drq; 217 sc->sc_scsi_dev = config2 & U24_HOSTID_MASK; 218 } 219 220 return (1); 221 } 222 223 static void 224 u24_start_mbox(struct uha_softc *sc, struct uha_mscp *mscp) 225 { 226 bus_space_tag_t iot = sc->sc_iot; 227 bus_space_handle_t ioh = sc->sc_ioh; 228 int spincount = 100000; /* 1s should be enough */ 229 230 while (--spincount) { 231 if ((bus_space_read_1(iot, ioh, U24_LINT) & U24_LDIP) == 0) 232 break; 233 delay(100); 234 } 235 if (!spincount) { 236 aprint_error_dev(sc->sc_dev, "uha_start_mbox, board not responding\n"); 237 Debugger(); 238 } 239 240 bus_space_write_4(iot, ioh, U24_OGMPTR, 241 sc->sc_dmamap_mscp->dm_segs[0].ds_addr + UHA_MSCP_OFF(mscp)); 242 if (mscp->flags & MSCP_ABORT) 243 bus_space_write_1(iot, ioh, U24_OGMCMD, 0x80); 244 else 245 bus_space_write_1(iot, ioh, U24_OGMCMD, 0x01); 246 bus_space_write_1(iot, ioh, U24_LINT, U24_OGMFULL); 247 248 if ((mscp->xs->xs_control & XS_CTL_POLL) == 0) 249 callout_reset(&mscp->xs->xs_callout, 250 mstohz(mscp->timeout), uha_timeout, mscp); 251 } 252 253 static int 254 u24_poll(struct uha_softc *sc, struct scsipi_xfer *xs, int count) 255 { 256 bus_space_tag_t iot = sc->sc_iot; 257 bus_space_handle_t ioh = sc->sc_ioh; 258 259 while (count) { 260 /* 261 * If we had interrupts enabled, would we 262 * have got an interrupt? 263 */ 264 if (bus_space_read_1(iot, ioh, U24_SINT) & U24_SDIP) 265 u24_intr(sc); 266 if (xs->xs_status & XS_STS_DONE) 267 return (0); 268 delay(1000); 269 count--; 270 } 271 return (1); 272 } 273 274 static int 275 u24_intr(void *arg) 276 { 277 struct uha_softc *sc = arg; 278 bus_space_tag_t iot = sc->sc_iot; 279 bus_space_handle_t ioh = sc->sc_ioh; 280 struct uha_mscp *mscp; 281 u_char uhastat; 282 u_long mboxval; 283 284 #ifdef UHADEBUG 285 printf("%s: uhaintr ", device_xname(sc->sc_dev)); 286 #endif /*UHADEBUG */ 287 288 if ((bus_space_read_1(iot, ioh, U24_SINT) & U24_SDIP) == 0) 289 return (0); 290 291 for (;;) { 292 /* 293 * First get all the information and then 294 * acknowledge the interrupt 295 */ 296 uhastat = bus_space_read_1(iot, ioh, U24_SINT); 297 mboxval = bus_space_read_4(iot, ioh, U24_ICMPTR); 298 bus_space_write_1(iot, ioh, U24_SINT, U24_ICM_ACK); 299 bus_space_write_1(iot, ioh, U24_ICMCMD, 0); 300 301 #ifdef UHADEBUG 302 printf("status = 0x%x ", uhastat); 303 #else 304 __USE(uhastat); 305 #endif /*UHADEBUG*/ 306 307 /* 308 * Process the completed operation 309 */ 310 mscp = uha_mscp_phys_kv(sc, mboxval); 311 if (!mscp) { 312 printf("%s: BAD MSCP RETURNED!\n", 313 device_xname(sc->sc_dev)); 314 continue; /* whatever it was, it'll timeout */ 315 } 316 callout_stop(&mscp->xs->xs_callout); 317 uha_done(sc, mscp); 318 319 if ((bus_space_read_1(iot, ioh, U24_SINT) & U24_SDIP) == 0) 320 return (1); 321 } 322 } 323 324 static void 325 u24_init(struct uha_softc *sc) 326 { 327 bus_space_tag_t iot = sc->sc_iot; 328 bus_space_handle_t ioh = sc->sc_ioh; 329 330 /* free OGM and ICM */ 331 bus_space_write_1(iot, ioh, U24_OGMCMD, 0); 332 bus_space_write_1(iot, ioh, U24_ICMCMD, 0); 333 /* make sure interrupts are enabled */ 334 #ifdef UHADEBUG 335 printf("u24_init: lmask=%02x, smask=%02x\n", 336 bus_space_read_1(iot, ioh, U24_LMASK), 337 bus_space_read_1(iot, ioh, U24_SMASK)); 338 #endif 339 bus_space_write_1(iot, ioh, U24_LMASK, 0xd2); /* XXX */ 340 bus_space_write_1(iot, ioh, U24_SMASK, 0x92); /* XXX */ 341 } 342
Indexes created Sun Sep 28 07:09:56 GMT 2025