if_ie_obio.c revision 1.2.4.2
1 1.2.4.2 nathanw /* $NetBSD: if_ie_obio.c,v 1.2.4.2 2002/10/18 02:40:14 nathanw Exp $ */ 2 1.2.4.2 nathanw 3 1.2.4.2 nathanw /*- 4 1.2.4.2 nathanw * Copyright (c) 1997 The NetBSD Foundation, Inc. 5 1.2.4.2 nathanw * All rights reserved. 6 1.2.4.2 nathanw * 7 1.2.4.2 nathanw * This code is derived from software contributed to The NetBSD Foundation 8 1.2.4.2 nathanw * by Paul Kranenburg and Matt Fredette. 9 1.2.4.2 nathanw * 10 1.2.4.2 nathanw * Redistribution and use in source and binary forms, with or without 11 1.2.4.2 nathanw * modification, are permitted provided that the following conditions 12 1.2.4.2 nathanw * are met: 13 1.2.4.2 nathanw * 1. Redistributions of source code must retain the above copyright 14 1.2.4.2 nathanw * notice, this list of conditions and the following disclaimer. 15 1.2.4.2 nathanw * 2. Redistributions in binary form must reproduce the above copyright 16 1.2.4.2 nathanw * notice, this list of conditions and the following disclaimer in the 17 1.2.4.2 nathanw * documentation and/or other materials provided with the distribution. 18 1.2.4.2 nathanw * 3. All advertising materials mentioning features or use of this software 19 1.2.4.2 nathanw * must display the following acknowledgement: 20 1.2.4.2 nathanw * This product includes software developed by the NetBSD 21 1.2.4.2 nathanw * Foundation, Inc. and its contributors. 22 1.2.4.2 nathanw * 4. Neither the name of The NetBSD Foundation nor the names of its 23 1.2.4.2 nathanw * contributors may be used to endorse or promote products derived 24 1.2.4.2 nathanw * from this software without specific prior written permission. 25 1.2.4.2 nathanw * 26 1.2.4.2 nathanw * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 1.2.4.2 nathanw * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 1.2.4.2 nathanw * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 1.2.4.2 nathanw * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 1.2.4.2 nathanw * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 1.2.4.2 nathanw * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 1.2.4.2 nathanw * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 1.2.4.2 nathanw * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 1.2.4.2 nathanw * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 1.2.4.2 nathanw * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 1.2.4.2 nathanw * POSSIBILITY OF SUCH DAMAGE. 37 1.2.4.2 nathanw */ 38 1.2.4.2 nathanw 39 1.2.4.2 nathanw /*- 40 1.2.4.2 nathanw * Copyright (c) 1995 Charles D. Cranor 41 1.2.4.2 nathanw * All rights reserved. 42 1.2.4.2 nathanw * 43 1.2.4.2 nathanw * Redistribution and use in source and binary forms, with or without 44 1.2.4.2 nathanw * modification, are permitted provided that the following conditions 45 1.2.4.2 nathanw * are met: 46 1.2.4.2 nathanw * 1. Redistributions of source code must retain the above copyright 47 1.2.4.2 nathanw * notice, this list of conditions and the following disclaimer. 48 1.2.4.2 nathanw * 2. Redistributions in binary form must reproduce the above copyright 49 1.2.4.2 nathanw * notice, this list of conditions and the following disclaimer in the 50 1.2.4.2 nathanw * documentation and/or other materials provided with the distribution. 51 1.2.4.2 nathanw * 3. All advertising materials mentioning features or use of this software 52 1.2.4.2 nathanw * must display the following acknowledgement: 53 1.2.4.2 nathanw * This product includes software developed by Charles D. Cranor. 54 1.2.4.2 nathanw * 4. The name of the author may not be used to endorse or promote products 55 1.2.4.2 nathanw * derived from this software without specific prior written permission. 56 1.2.4.2 nathanw * 57 1.2.4.2 nathanw * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 58 1.2.4.2 nathanw * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 59 1.2.4.2 nathanw * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 60 1.2.4.2 nathanw * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 61 1.2.4.2 nathanw * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 62 1.2.4.2 nathanw * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 63 1.2.4.2 nathanw * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 64 1.2.4.2 nathanw * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 65 1.2.4.2 nathanw * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 66 1.2.4.2 nathanw * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 67 1.2.4.2 nathanw */ 68 1.2.4.2 nathanw 69 1.2.4.2 nathanw 70 1.2.4.2 nathanw 71 1.2.4.2 nathanw /* 72 1.2.4.2 nathanw * Sun2 OBIO front-end for the Intel 82586 Ethernet driver 73 1.2.4.2 nathanw * 74 1.2.4.2 nathanw * Converted to SUN ie driver by Charles D. Cranor, 75 1.2.4.2 nathanw * October 1994, January 1995. 76 1.2.4.2 nathanw */ 77 1.2.4.2 nathanw 78 1.2.4.2 nathanw /* 79 1.2.4.2 nathanw * The i82586 is a very painful chip, found in sun[23]'s, sun-4/100's 80 1.2.4.2 nathanw * sun-4/200's, and VME based suns. The byte order is all wrong for a 81 1.2.4.2 nathanw * SUN, making life difficult. Programming this chip is mostly the same, 82 1.2.4.2 nathanw * but certain details differ from system to system. This driver is 83 1.2.4.2 nathanw * written so that different "ie" interfaces can be controled by the same 84 1.2.4.2 nathanw * driver. 85 1.2.4.2 nathanw */ 86 1.2.4.2 nathanw 87 1.2.4.2 nathanw #include <sys/param.h> 88 1.2.4.2 nathanw #include <sys/systm.h> 89 1.2.4.2 nathanw #include <sys/errno.h> 90 1.2.4.2 nathanw #include <sys/device.h> 91 1.2.4.2 nathanw #include <sys/malloc.h> 92 1.2.4.2 nathanw #include <sys/protosw.h> 93 1.2.4.2 nathanw #include <sys/socket.h> 94 1.2.4.2 nathanw 95 1.2.4.2 nathanw #include <net/if.h> 96 1.2.4.2 nathanw #include <net/if_types.h> 97 1.2.4.2 nathanw #include <net/if_dl.h> 98 1.2.4.2 nathanw #include <net/if_media.h> 99 1.2.4.2 nathanw #include <net/if_ether.h> 100 1.2.4.2 nathanw 101 1.2.4.2 nathanw #include <uvm/uvm_extern.h> 102 1.2.4.2 nathanw 103 1.2.4.2 nathanw #include <machine/bus.h> 104 1.2.4.2 nathanw #include <machine/intr.h> 105 1.2.4.2 nathanw #include <machine/autoconf.h> 106 1.2.4.2 nathanw #include <machine/idprom.h> 107 1.2.4.2 nathanw 108 1.2.4.2 nathanw #include <dev/ic/i82586reg.h> 109 1.2.4.2 nathanw #include <dev/ic/i82586var.h> 110 1.2.4.2 nathanw 111 1.2.4.2 nathanw /* 112 1.2.4.2 nathanw * the on-board interface 113 1.2.4.2 nathanw */ 114 1.2.4.2 nathanw struct ieob { 115 1.2.4.2 nathanw u_char obctrl; 116 1.2.4.2 nathanw }; 117 1.2.4.2 nathanw #define IEOB_NORSET 0x80 /* don't reset the board */ 118 1.2.4.2 nathanw #define IEOB_ONAIR 0x40 /* put us on the air */ 119 1.2.4.2 nathanw #define IEOB_ATTEN 0x20 /* attention! */ 120 1.2.4.2 nathanw #define IEOB_IENAB 0x10 /* interrupt enable */ 121 1.2.4.2 nathanw #define IEOB_XXXXX 0x08 /* free bit */ 122 1.2.4.2 nathanw #define IEOB_XCVRL2 0x04 /* level 2 transceiver? */ 123 1.2.4.2 nathanw #define IEOB_BUSERR 0x02 /* bus error */ 124 1.2.4.2 nathanw #define IEOB_INT 0x01 /* interrupt */ 125 1.2.4.2 nathanw 126 1.2.4.2 nathanw #define IEOB_ADBASE 0x000000 /* KVA base addr of 24 bit address space */ 127 1.2.4.2 nathanw 128 1.2.4.2 nathanw 129 1.2.4.2 nathanw static void ie_obreset __P((struct ie_softc *, int)); 130 1.2.4.2 nathanw static void ie_obattend __P((struct ie_softc *, int)); 131 1.2.4.2 nathanw static void ie_obrun __P((struct ie_softc *)); 132 1.2.4.2 nathanw 133 1.2.4.2 nathanw int ie_obio_match __P((struct device *, struct cfdata *, void *)); 134 1.2.4.2 nathanw void ie_obio_attach __P((struct device *, struct device *, void *)); 135 1.2.4.2 nathanw 136 1.2.4.2 nathanw CFATTACH_DECL(ie_obio, sizeof(struct ie_softc), 137 1.2.4.2 nathanw ie_obio_match, ie_obio_attach, NULL, NULL); 138 1.2.4.2 nathanw 139 1.2.4.2 nathanw /* Supported media */ 140 1.2.4.2 nathanw static int media[] = { 141 1.2.4.2 nathanw IFM_ETHER | IFM_10_2, 142 1.2.4.2 nathanw }; 143 1.2.4.2 nathanw #define NMEDIA (sizeof(media) / sizeof(media[0])) 144 1.2.4.2 nathanw 145 1.2.4.2 nathanw 146 1.2.4.2 nathanw /* 147 1.2.4.2 nathanw * OBIO ie support routines 148 1.2.4.2 nathanw */ 149 1.2.4.2 nathanw void 150 1.2.4.2 nathanw ie_obreset(sc, what) 151 1.2.4.2 nathanw struct ie_softc *sc; 152 1.2.4.2 nathanw { 153 1.2.4.2 nathanw volatile struct ieob *ieo = (struct ieob *) sc->sc_reg; 154 1.2.4.2 nathanw ieo->obctrl = 0; 155 1.2.4.2 nathanw delay(100); /* XXX could be shorter? */ 156 1.2.4.2 nathanw ieo->obctrl = IEOB_NORSET; 157 1.2.4.2 nathanw } 158 1.2.4.2 nathanw void 159 1.2.4.2 nathanw ie_obattend(sc, why) 160 1.2.4.2 nathanw struct ie_softc *sc; 161 1.2.4.2 nathanw int why; 162 1.2.4.2 nathanw { 163 1.2.4.2 nathanw volatile struct ieob *ieo = (struct ieob *) sc->sc_reg; 164 1.2.4.2 nathanw 165 1.2.4.2 nathanw ieo->obctrl |= IEOB_ATTEN; /* flag! */ 166 1.2.4.2 nathanw ieo->obctrl &= ~IEOB_ATTEN; /* down. */ 167 1.2.4.2 nathanw } 168 1.2.4.2 nathanw 169 1.2.4.2 nathanw void 170 1.2.4.2 nathanw ie_obrun(sc) 171 1.2.4.2 nathanw struct ie_softc *sc; 172 1.2.4.2 nathanw { 173 1.2.4.2 nathanw volatile struct ieob *ieo = (struct ieob *) sc->sc_reg; 174 1.2.4.2 nathanw 175 1.2.4.2 nathanw ieo->obctrl |= (IEOB_ONAIR|IEOB_IENAB|IEOB_NORSET); 176 1.2.4.2 nathanw } 177 1.2.4.2 nathanw 178 1.2.4.2 nathanw void ie_obio_memcopyin __P((struct ie_softc *, void *, int, size_t)); 179 1.2.4.2 nathanw void ie_obio_memcopyout __P((struct ie_softc *, const void *, int, size_t)); 180 1.2.4.2 nathanw 181 1.2.4.2 nathanw /* 182 1.2.4.2 nathanw * Copy board memory to kernel. 183 1.2.4.2 nathanw */ 184 1.2.4.2 nathanw void 185 1.2.4.2 nathanw ie_obio_memcopyin(sc, p, offset, size) 186 1.2.4.2 nathanw struct ie_softc *sc; 187 1.2.4.2 nathanw void *p; 188 1.2.4.2 nathanw int offset; 189 1.2.4.2 nathanw size_t size; 190 1.2.4.2 nathanw { 191 1.2.4.2 nathanw bus_space_copyin(sc->bt, sc->bh, offset, p, size); 192 1.2.4.2 nathanw } 193 1.2.4.2 nathanw 194 1.2.4.2 nathanw /* 195 1.2.4.2 nathanw * Copy from kernel space to naord memory. 196 1.2.4.2 nathanw */ 197 1.2.4.2 nathanw void 198 1.2.4.2 nathanw ie_obio_memcopyout(sc, p, offset, size) 199 1.2.4.2 nathanw struct ie_softc *sc; 200 1.2.4.2 nathanw const void *p; 201 1.2.4.2 nathanw int offset; 202 1.2.4.2 nathanw size_t size; 203 1.2.4.2 nathanw { 204 1.2.4.2 nathanw bus_space_copyout(sc->bt, sc->bh, offset, p, size); 205 1.2.4.2 nathanw } 206 1.2.4.2 nathanw 207 1.2.4.2 nathanw /* read a 16-bit value at BH offset */ 208 1.2.4.2 nathanw u_int16_t ie_obio_read16 __P((struct ie_softc *, int offset)); 209 1.2.4.2 nathanw /* write a 16-bit value at BH offset */ 210 1.2.4.2 nathanw void ie_obio_write16 __P((struct ie_softc *, int offset, u_int16_t value)); 211 1.2.4.2 nathanw void ie_obio_write24 __P((struct ie_softc *, int offset, int addr)); 212 1.2.4.2 nathanw 213 1.2.4.2 nathanw u_int16_t 214 1.2.4.2 nathanw ie_obio_read16(sc, offset) 215 1.2.4.2 nathanw struct ie_softc *sc; 216 1.2.4.2 nathanw int offset; 217 1.2.4.2 nathanw { 218 1.2.4.2 nathanw u_int16_t v = bus_space_read_2(sc->bt, sc->bh, offset); 219 1.2.4.2 nathanw return (((v&0xff)<<8) | ((v>>8)&0xff)); 220 1.2.4.2 nathanw } 221 1.2.4.2 nathanw 222 1.2.4.2 nathanw void 223 1.2.4.2 nathanw ie_obio_write16(sc, offset, v) 224 1.2.4.2 nathanw struct ie_softc *sc; 225 1.2.4.2 nathanw int offset; 226 1.2.4.2 nathanw u_int16_t v; 227 1.2.4.2 nathanw { 228 1.2.4.2 nathanw v = (((v&0xff)<<8) | ((v>>8)&0xff)); 229 1.2.4.2 nathanw bus_space_write_2(sc->bt, sc->bh, offset, v); 230 1.2.4.2 nathanw } 231 1.2.4.2 nathanw 232 1.2.4.2 nathanw void 233 1.2.4.2 nathanw ie_obio_write24(sc, offset, addr) 234 1.2.4.2 nathanw struct ie_softc *sc; 235 1.2.4.2 nathanw int offset; 236 1.2.4.2 nathanw int addr; 237 1.2.4.2 nathanw { 238 1.2.4.2 nathanw u_char *f = (u_char *)&addr; 239 1.2.4.2 nathanw u_int16_t v0, v1; 240 1.2.4.2 nathanw u_char *t; 241 1.2.4.2 nathanw 242 1.2.4.2 nathanw t = (u_char *)&v0; 243 1.2.4.2 nathanw t[0] = f[3]; t[1] = f[2]; 244 1.2.4.2 nathanw bus_space_write_2(sc->bt, sc->bh, offset, v0); 245 1.2.4.2 nathanw 246 1.2.4.2 nathanw t = (u_char *)&v1; 247 1.2.4.2 nathanw t[0] = f[1]; t[1] = 0; 248 1.2.4.2 nathanw bus_space_write_2(sc->bt, sc->bh, offset+2, v1); 249 1.2.4.2 nathanw } 250 1.2.4.2 nathanw 251 1.2.4.2 nathanw int 252 1.2.4.2 nathanw ie_obio_match(parent, cf, aux) 253 1.2.4.2 nathanw struct device *parent; 254 1.2.4.2 nathanw struct cfdata *cf; 255 1.2.4.2 nathanw void *aux; 256 1.2.4.2 nathanw { 257 1.2.4.2 nathanw struct obio_attach_args *oba = aux; 258 1.2.4.2 nathanw bus_space_handle_t bh; 259 1.2.4.2 nathanw int matched; 260 1.2.4.2 nathanw u_int8_t ctrl; 261 1.2.4.2 nathanw 262 1.2.4.2 nathanw /* No default obio address. */ 263 1.2.4.2 nathanw if (oba->oba_paddr == -1) 264 1.2.4.2 nathanw return(0); 265 1.2.4.2 nathanw 266 1.2.4.2 nathanw /* Make sure there is something there... */ 267 1.2.4.2 nathanw if (bus_space_map(oba->oba_bustag, oba->oba_paddr, sizeof(struct ieob), 268 1.2.4.2 nathanw 0, &bh)) 269 1.2.4.2 nathanw return (0); 270 1.2.4.2 nathanw matched = (!bus_space_poke_1(oba->oba_bustag, bh, 0, IEOB_NORSET) && 271 1.2.4.2 nathanw !bus_space_peek_1(oba->oba_bustag, bh, 0, &ctrl) && 272 1.2.4.2 nathanw (ctrl & (IEOB_ONAIR|IEOB_IENAB)) == 0); 273 1.2.4.2 nathanw bus_space_unmap(oba->oba_bustag, bh, sizeof(struct ieob)); 274 1.2.4.2 nathanw if (!matched) 275 1.2.4.2 nathanw return (0); 276 1.2.4.2 nathanw 277 1.2.4.2 nathanw /* Default interrupt priority. */ 278 1.2.4.2 nathanw if (oba->oba_pri == -1) 279 1.2.4.2 nathanw oba->oba_pri = 3; 280 1.2.4.2 nathanw 281 1.2.4.2 nathanw return (1); 282 1.2.4.2 nathanw } 283 1.2.4.2 nathanw 284 1.2.4.2 nathanw void 285 1.2.4.2 nathanw ie_obio_attach(parent, self, aux) 286 1.2.4.2 nathanw struct device *parent; 287 1.2.4.2 nathanw struct device *self; 288 1.2.4.2 nathanw void *aux; 289 1.2.4.2 nathanw { 290 1.2.4.2 nathanw struct obio_attach_args *oba = aux; 291 1.2.4.2 nathanw struct ie_softc *sc = (void *) self; 292 1.2.4.2 nathanw bus_dma_tag_t dmatag = oba->oba_dmatag; 293 1.2.4.2 nathanw bus_space_handle_t bh; 294 1.2.4.2 nathanw bus_dma_segment_t seg; 295 1.2.4.2 nathanw int rseg; 296 1.2.4.2 nathanw int error; 297 1.2.4.2 nathanw paddr_t pa; 298 1.2.4.2 nathanw struct intrhand *ih; 299 1.2.4.2 nathanw bus_size_t msize; 300 1.2.4.2 nathanw u_long iebase; 301 1.2.4.2 nathanw u_int8_t myaddr[ETHER_ADDR_LEN]; 302 1.2.4.2 nathanw 303 1.2.4.2 nathanw sc->bt = oba->oba_bustag; 304 1.2.4.2 nathanw 305 1.2.4.2 nathanw sc->hwreset = ie_obreset; 306 1.2.4.2 nathanw sc->chan_attn = ie_obattend; 307 1.2.4.2 nathanw sc->hwinit = ie_obrun; 308 1.2.4.2 nathanw sc->memcopyout = ie_obio_memcopyout; 309 1.2.4.2 nathanw sc->memcopyin = ie_obio_memcopyin; 310 1.2.4.2 nathanw 311 1.2.4.2 nathanw sc->ie_bus_barrier = NULL; 312 1.2.4.2 nathanw sc->ie_bus_read16 = ie_obio_read16; 313 1.2.4.2 nathanw sc->ie_bus_write16 = ie_obio_write16; 314 1.2.4.2 nathanw sc->ie_bus_write24 = ie_obio_write24; 315 1.2.4.2 nathanw sc->sc_msize = msize = 65536; /* XXX */ 316 1.2.4.2 nathanw 317 1.2.4.2 nathanw if (bus_space_map(oba->oba_bustag, oba->oba_paddr, sizeof(struct ieob), 318 1.2.4.2 nathanw 0, &bh)) 319 1.2.4.2 nathanw panic("ie_obio_attach: can't map regs"); 320 1.2.4.2 nathanw sc->sc_reg = (void *)bh; 321 1.2.4.2 nathanw 322 1.2.4.2 nathanw /* 323 1.2.4.2 nathanw * Allocate control & buffer memory. 324 1.2.4.2 nathanw */ 325 1.2.4.2 nathanw if ((error = bus_dmamap_create(dmatag, msize, 1, msize, 0, 326 1.2.4.2 nathanw BUS_DMA_NOWAIT|BUS_DMA_24BIT, 327 1.2.4.2 nathanw &sc->sc_dmamap)) != 0) { 328 1.2.4.2 nathanw printf("%s: DMA map create error %d\n", 329 1.2.4.2 nathanw sc->sc_dev.dv_xname, error); 330 1.2.4.2 nathanw return; 331 1.2.4.2 nathanw } 332 1.2.4.2 nathanw if ((error = bus_dmamem_alloc(dmatag, msize, 64*1024, 0, 333 1.2.4.2 nathanw &seg, 1, &rseg, 334 1.2.4.2 nathanw BUS_DMA_NOWAIT | BUS_DMA_24BIT)) != 0) { 335 1.2.4.2 nathanw printf("%s: DMA memory allocation error %d\n", 336 1.2.4.2 nathanw self->dv_xname, error); 337 1.2.4.2 nathanw return; 338 1.2.4.2 nathanw } 339 1.2.4.2 nathanw 340 1.2.4.2 nathanw /* Map DMA buffer in CPU addressable space */ 341 1.2.4.2 nathanw if ((error = bus_dmamem_map(dmatag, &seg, rseg, msize, 342 1.2.4.2 nathanw (caddr_t *)&sc->sc_maddr, 343 1.2.4.2 nathanw BUS_DMA_NOWAIT|BUS_DMA_COHERENT)) != 0) { 344 1.2.4.2 nathanw printf("%s: DMA buffer map error %d\n", 345 1.2.4.2 nathanw sc->sc_dev.dv_xname, error); 346 1.2.4.2 nathanw bus_dmamem_free(dmatag, &seg, rseg); 347 1.2.4.2 nathanw return; 348 1.2.4.2 nathanw } 349 1.2.4.2 nathanw 350 1.2.4.2 nathanw /* Load the segment */ 351 1.2.4.2 nathanw if ((error = bus_dmamap_load(dmatag, sc->sc_dmamap, 352 1.2.4.2 nathanw sc->sc_maddr, msize, NULL, 353 1.2.4.2 nathanw BUS_DMA_NOWAIT)) != 0) { 354 1.2.4.2 nathanw printf("%s: DMA buffer map load error %d\n", 355 1.2.4.2 nathanw sc->sc_dev.dv_xname, error); 356 1.2.4.2 nathanw bus_dmamem_unmap(dmatag, sc->sc_maddr, msize); 357 1.2.4.2 nathanw bus_dmamem_free(dmatag, &seg, rseg); 358 1.2.4.2 nathanw return; 359 1.2.4.2 nathanw } 360 1.2.4.2 nathanw 361 1.2.4.2 nathanw w16zero(sc->sc_maddr, msize); 362 1.2.4.2 nathanw sc->bh = (bus_space_handle_t)(sc->sc_maddr); 363 1.2.4.2 nathanw 364 1.2.4.2 nathanw /* 365 1.2.4.2 nathanw * The i82586's 24-bit address space maps to all of 366 1.2.4.2 nathanw * KVA space (). In addition, the SCP must appear 367 1.2.4.2 nathanw * at IE_SCP_ADDR within the 24-bit address space, 368 1.2.4.2 nathanw * i.e. at KVA IEOB_ADBASE+IE_SCP_ADDR, at the very top of 369 1.2.4.2 nathanw * kernel space. We double-map this last page to the first 370 1.2.4.2 nathanw * page (starting at `maddr') of the memory we allocate to the chip. 371 1.2.4.2 nathanw * (a side-effect of this double-map is that the ISCP and SCB 372 1.2.4.2 nathanw * structures also get aliased there, but we ignore this). The 373 1.2.4.2 nathanw * first page at `maddr' is only used for ISCP, SCB and the aliased 374 1.2.4.2 nathanw * SCP; the actual buffers start at maddr+NBPG. 375 1.2.4.2 nathanw * 376 1.2.4.2 nathanw * In a picture: 377 1.2.4.2 nathanw 378 1.2.4.2 nathanw |---//--- ISCP-SCB-----scp-|--//- buffers -//-|... |iscp-scb-----SCP-| 379 1.2.4.2 nathanw | | | | | | | 380 1.2.4.2 nathanw | |<----- NBPG --->| | |<----- NBPG -+-->| 381 1.2.4.2 nathanw | |<------------- msize ------------->| | ^ | 382 1.2.4.2 nathanw | | | | 383 1.2.4.2 nathanw | \@maddr (last page dbl mapped) 384 1.2.4.2 nathanw | | 385 1.2.4.2 nathanw \@IEOB_ADBASE @IEOB_ADBASE+IE_SCP_ADDR-+ 386 1.2.4.2 nathanw 387 1.2.4.2 nathanw * 388 1.2.4.2 nathanw */ 389 1.2.4.2 nathanw 390 1.2.4.2 nathanw /* Double map the SCP */ 391 1.2.4.2 nathanw if (pmap_extract(pmap_kernel(), (vaddr_t)sc->sc_maddr, &pa) == FALSE) 392 1.2.4.2 nathanw panic("ie pmap_extract"); 393 1.2.4.2 nathanw 394 1.2.4.2 nathanw pmap_enter(pmap_kernel(), m68k_trunc_page(IEOB_ADBASE+IE_SCP_ADDR), 395 1.2.4.2 nathanw pa | PMAP_NC /*| PMAP_IOC*/, 396 1.2.4.2 nathanw VM_PROT_READ | VM_PROT_WRITE, PMAP_WIRED); 397 1.2.4.2 nathanw 398 1.2.4.2 nathanw /* Map iscp at location 0 (relative to `maddr') */ 399 1.2.4.2 nathanw sc->iscp = 0; 400 1.2.4.2 nathanw 401 1.2.4.2 nathanw /* scb follows iscp */ 402 1.2.4.2 nathanw sc->scb = IE_ISCP_SZ; 403 1.2.4.2 nathanw 404 1.2.4.2 nathanw /* scp is at the fixed location IE_SCP_ADDR (modulo the page size) */ 405 1.2.4.2 nathanw sc->scp = IE_SCP_ADDR & PGOFSET; 406 1.2.4.2 nathanw 407 1.2.4.2 nathanw /* Calculate the 24-bit base of i82586 operations */ 408 1.2.4.2 nathanw iebase = (u_long)sc->sc_dmamap->dm_segs[0].ds_addr - 409 1.2.4.2 nathanw (u_long)IEOB_ADBASE; 410 1.2.4.2 nathanw ie_obio_write16(sc, IE_ISCP_SCB(sc->iscp), sc->scb); 411 1.2.4.2 nathanw ie_obio_write24(sc, IE_ISCP_BASE(sc->iscp), iebase); 412 1.2.4.2 nathanw ie_obio_write24(sc, IE_SCP_ISCP(sc->scp), iebase + sc->iscp); 413 1.2.4.2 nathanw 414 1.2.4.2 nathanw /* 415 1.2.4.2 nathanw * Rest of first page is unused (wasted!); the other pages 416 1.2.4.2 nathanw * are used for buffers. 417 1.2.4.2 nathanw */ 418 1.2.4.2 nathanw sc->buf_area = NBPG; 419 1.2.4.2 nathanw sc->buf_area_sz = msize - NBPG; 420 1.2.4.2 nathanw 421 1.2.4.2 nathanw if (i82586_proberam(sc) == 0) { 422 1.2.4.2 nathanw printf(": memory probe failed\n"); 423 1.2.4.2 nathanw return; 424 1.2.4.2 nathanw } 425 1.2.4.2 nathanw 426 1.2.4.2 nathanw idprom_etheraddr(myaddr); 427 1.2.4.2 nathanw i82586_attach(sc, "onboard", myaddr, media, NMEDIA, media[0]); 428 1.2.4.2 nathanw 429 1.2.4.2 nathanw /* Establish interrupt channel */ 430 1.2.4.2 nathanw ih = bus_intr_establish(oba->oba_bustag, 431 1.2.4.2 nathanw oba->oba_pri, IPL_NET, 0, 432 1.2.4.2 nathanw i82586_intr, sc); 433 1.2.4.2 nathanw } 434
Indexes created Mon Oct 20 11:09:49 GMT 2025