uha_isa.c revision 1.1
1 #include <sys/types.h> 2 #include <sys/param.h> 3 #include <sys/device.h> 4 #include <sys/kernel.h> 5 #include <sys/proc.h> 6 #include <sys/user.h> 7 8 #include <machine/bus.h> 9 #include <machine/intr.h> 10 11 #include <scsi/scsi_all.h> 12 #include <scsi/scsiconf.h> 13 14 #include <dev/isa/isavar.h> 15 #include <dev/isa/isadmavar.h> 16 17 #include <dev/ic/uhareg.h> 18 #include <dev/ic/uhavar.h> 19 20 #define UHA_ISA_IOSIZE 16 21 22 int uha_isa_probe __P((struct device *, void *, void *)); 23 void uha_isa_attach __P((struct device *, struct device *, void *)); 24 25 struct cfattach uha_isa_ca = { 26 sizeof(struct uha_softc), uha_isa_probe, uha_isa_attach 27 }; 28 29 #define KVTOPHYS(x) vtophys(x) 30 31 int u14_find __P((bus_chipset_tag_t, bus_io_handle_t, struct uha_softc *)); 32 void u14_start_mbox __P((struct uha_softc *, struct uha_mscp *)); 33 int u14_poll __P((struct uha_softc *, struct scsi_xfer *, int)); 34 int u14_intr __P((void *)); 35 void u14_init __P((struct uha_softc *)); 36 37 /* 38 * Check the slots looking for a board we recognise 39 * If we find one, note it's address (slot) and call 40 * the actual probe routine to check it out. 41 */ 42 int 43 uha_isa_probe(parent, match, aux) 44 struct device *parent; 45 void *match, *aux; 46 { 47 struct isa_attach_args *ia = aux; 48 struct uha_softc sc; 49 bus_chipset_tag_t bc = ia->ia_bc; 50 bus_io_handle_t ioh; 51 isa_chipset_tag_t ic = ia->ia_ic; 52 int rv; 53 54 if (bus_io_map(bc, ia->ia_iobase, UHA_ISA_IOSIZE, &ioh)) 55 return (0); 56 57 rv = u14_find(bc, ioh, &sc); 58 59 bus_io_unmap(bc, ioh, UHA_ISA_IOSIZE); 60 61 if (rv) { 62 if (ia->ia_irq != -1 && ia->ia_irq != sc.sc_irq) 63 return (0); 64 if (ia->ia_drq != -1 && ia->ia_drq != sc.sc_drq) 65 return (0); 66 ia->ia_irq = sc.sc_irq; 67 ia->ia_drq = sc.sc_drq; 68 ia->ia_msize = 0; 69 ia->ia_iosize = UHA_ISA_IOSIZE; 70 } 71 return (rv); 72 } 73 74 /* 75 * Attach all the sub-devices we can find 76 */ 77 void 78 uha_isa_attach(parent, self, aux) 79 struct device *parent, *self; 80 void *aux; 81 { 82 struct isa_attach_args *ia = aux; 83 struct uha_softc *sc = (void *)self; 84 bus_chipset_tag_t bc = ia->ia_bc; 85 bus_io_handle_t ioh; 86 isa_chipset_tag_t ic = ia->ia_ic; 87 88 printf("\n"); 89 90 if (bus_io_map(bc, ia->ia_iobase, UHA_ISA_IOSIZE, &ioh)) 91 panic("uha_attach: bus_io_map failed!"); 92 93 sc->sc_bc = bc; 94 sc->sc_ioh = ioh; 95 if (!u14_find(bc, ioh, sc)) 96 panic("uha_attach: u14_find failed!"); 97 98 if (sc->sc_drq != -1) 99 isa_dmacascade(sc->sc_drq); 100 101 sc->sc_ih = isa_intr_establish(ic, sc->sc_irq, IST_EDGE, IPL_BIO, 102 u14_intr, sc); 103 if (sc->sc_ih == NULL) { 104 printf("%s: couldn't establish interrupt\n", 105 sc->sc_dev.dv_xname); 106 return; 107 } 108 109 /* Save function pointers for later use. */ 110 sc->start_mbox = u14_start_mbox; 111 sc->poll = u14_poll; 112 sc->init = u14_init; 113 114 uha_attach(sc); 115 } 116 117 /* 118 * Start the board, ready for normal operation 119 */ 120 int 121 u14_find(bc, ioh, sc) 122 bus_chipset_tag_t bc; 123 bus_io_handle_t ioh; 124 struct uha_softc *sc; 125 { 126 u_int16_t model, config; 127 int irq, drq; 128 int resetcount = 4000; /* 4 secs? */ 129 130 model = (bus_io_read_1(bc, ioh, U14_ID + 0) << 8) | 131 (bus_io_read_1(bc, ioh, U14_ID + 1) << 0); 132 if ((model & 0xfff0) != 0x5640) 133 return (0); 134 135 config = (bus_io_read_1(bc, ioh, U14_CONFIG + 0) << 8) | 136 (bus_io_read_1(bc, ioh, U14_CONFIG + 1) << 0); 137 138 switch (model & 0x000f) { 139 case 0x0000: 140 switch (config & U14_DMA_MASK) { 141 case U14_DMA_CH5: 142 drq = 5; 143 break; 144 case U14_DMA_CH6: 145 drq = 6; 146 break; 147 case U14_DMA_CH7: 148 drq = 7; 149 break; 150 default: 151 printf("u14_find: illegal drq setting %x\n", 152 config & U14_DMA_MASK); 153 return (0); 154 } 155 break; 156 case 0x0001: 157 /* This is a 34f, and doesn't need an ISA DMA channel. */ 158 drq = -1; 159 break; 160 } 161 162 switch (config & U14_IRQ_MASK) { 163 case U14_IRQ10: 164 irq = 10; 165 break; 166 case U14_IRQ11: 167 irq = 11; 168 break; 169 case U14_IRQ14: 170 irq = 14; 171 break; 172 case U14_IRQ15: 173 irq = 15; 174 break; 175 default: 176 printf("u14_find: illegal irq setting %x\n", 177 config & U14_IRQ_MASK); 178 return (0); 179 } 180 181 bus_io_write_1(bc, ioh, U14_LINT, UHA_ASRST); 182 183 while (--resetcount) { 184 if (bus_io_read_1(bc, ioh, U14_LINT)) 185 break; 186 delay(1000); /* 1 mSec per loop */ 187 } 188 if (!resetcount) { 189 printf("u14_find: board timed out during reset\n"); 190 return (0); 191 } 192 193 /* if we want to fill in softc, do so now */ 194 if (sc != NULL) { 195 sc->sc_irq = irq; 196 sc->sc_drq = drq; 197 sc->sc_scsi_dev = config & U14_HOSTID_MASK; 198 } 199 200 return (1); 201 } 202 203 /* 204 * Function to send a command out through a mailbox 205 */ 206 void 207 u14_start_mbox(sc, mscp) 208 struct uha_softc *sc; 209 struct uha_mscp *mscp; 210 { 211 bus_chipset_tag_t bc = sc->sc_bc; 212 bus_io_handle_t ioh = sc->sc_ioh; 213 int spincount = 100000; /* 1s should be enough */ 214 215 while (--spincount) { 216 if ((bus_io_read_1(bc, ioh, U14_LINT) & U14_LDIP) == 0) 217 break; 218 delay(100); 219 } 220 if (!spincount) { 221 printf("%s: uha_start_mbox, board not responding\n", 222 sc->sc_dev.dv_xname); 223 Debugger(); 224 } 225 226 bus_io_write_4(bc, ioh, U14_OGMPTR, KVTOPHYS(mscp)); 227 if (mscp->flags & MSCP_ABORT) 228 bus_io_write_1(bc, ioh, U14_LINT, U14_ABORT); 229 else 230 bus_io_write_1(bc, ioh, U14_LINT, U14_OGMFULL); 231 232 if ((mscp->xs->flags & SCSI_POLL) == 0) 233 timeout(uha_timeout, mscp, (mscp->timeout * hz) / 1000); 234 } 235 236 /* 237 * Function to poll for command completion when in poll mode. 238 * 239 * wait = timeout in msec 240 */ 241 int 242 u14_poll(sc, xs, count) 243 struct uha_softc *sc; 244 struct scsi_xfer *xs; 245 int count; 246 { 247 bus_chipset_tag_t bc = sc->sc_bc; 248 bus_io_handle_t ioh = sc->sc_ioh; 249 250 while (count) { 251 /* 252 * If we had interrupts enabled, would we 253 * have got an interrupt? 254 */ 255 if (bus_io_read_1(bc, ioh, U14_SINT) & U14_SDIP) 256 u14_intr(sc); 257 if (xs->flags & ITSDONE) 258 return (0); 259 delay(1000); 260 count--; 261 } 262 return (1); 263 } 264 265 /* 266 * Catch an interrupt from the adaptor 267 */ 268 int 269 u14_intr(arg) 270 void *arg; 271 { 272 struct uha_softc *sc = arg; 273 bus_chipset_tag_t bc = sc->sc_bc; 274 bus_io_handle_t ioh = sc->sc_ioh; 275 struct uha_mscp *mscp; 276 u_char uhastat; 277 u_long mboxval; 278 279 #ifdef UHADEBUG 280 printf("%s: uhaintr ", sc->sc_dev.dv_xname); 281 #endif /*UHADEBUG */ 282 283 if ((bus_io_read_1(bc, ioh, U14_SINT) & U14_SDIP) == 0) 284 return (0); 285 286 for (;;) { 287 /* 288 * First get all the information and then 289 * acknowledge the interrupt 290 */ 291 uhastat = bus_io_read_1(bc, ioh, U14_SINT); 292 mboxval = bus_io_read_4(bc, ioh, U14_ICMPTR); 293 /* XXX Send an ABORT_ACK instead? */ 294 bus_io_write_1(bc, ioh, U14_SINT, U14_ICM_ACK); 295 296 #ifdef UHADEBUG 297 printf("status = 0x%x ", uhastat); 298 #endif /*UHADEBUG*/ 299 300 /* 301 * Process the completed operation 302 */ 303 mscp = uha_mscp_phys_kv(sc, mboxval); 304 if (!mscp) { 305 printf("%s: BAD MSCP RETURNED!\n", 306 sc->sc_dev.dv_xname); 307 continue; /* whatever it was, it'll timeout */ 308 } 309 310 untimeout(uha_timeout, mscp); 311 uha_done(sc, mscp); 312 313 if ((bus_io_read_1(bc, ioh, U14_SINT) & U14_SDIP) == 0) 314 return (1); 315 } 316 } 317 318 void 319 u14_init(sc) 320 struct uha_softc *sc; 321 { 322 bus_chipset_tag_t bc = sc->sc_bc; 323 bus_io_handle_t ioh = sc->sc_ioh; 324 325 /* make sure interrupts are enabled */ 326 #ifdef UHADEBUG 327 printf("u14_init: lmask=%02x, smask=%02x\n", 328 bus_io_read_1(bc, ioh, U14_LMASK), 329 bus_io_read_1(bc, ioh, U14_SMASK)); 330 #endif 331 bus_io_write_1(bc, ioh, U14_LMASK, 0xd1); /* XXX */ 332 bus_io_write_1(bc, ioh, U14_SMASK, 0x91); /* XXX */ 333 } 334
Indexes created Tue Sep 30 20:09:53 GMT 2025