1 /* $NetBSD: if_ie_vme.c,v 1.21 2007/03/04 13:59:47 tsutsui Exp $ */ 2 3 /*- 4 * Copyright (c) 1996 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Gordon W. Ross. 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 /* 40 * Machine-dependent glue for the Intel Ethernet (ie) driver. 41 */ 42 43 #include <sys/cdefs.h> 44 __KERNEL_RCSID(0, "$NetBSD: if_ie_vme.c,v 1.21 2007/03/04 13:59:47 tsutsui Exp $"); 45 46 #include "opt_inet.h" 47 48 #include <sys/param.h> 49 #include <sys/systm.h> 50 #include <sys/device.h> 51 #include <sys/protosw.h> 52 #include <sys/socket.h> 53 #include <net/if.h> 54 #include <net/if_ether.h> 55 56 #ifdef INET 57 #include <netinet/in.h> 58 #include <netinet/in_systm.h> 59 #include <netinet/in_var.h> 60 #include <netinet/ip.h> 61 #include <netinet/if_inarp.h> 62 #endif 63 64 #include <machine/autoconf.h> 65 #include <machine/cpu.h> 66 #include <machine/dvma.h> 67 #include <machine/idprom.h> 68 #include <machine/vmparam.h> 69 70 #include "i82586.h" 71 #include "if_iereg.h" 72 #include "if_ievar.h" 73 74 static void ie_vmereset(struct ie_softc *); 75 static void ie_vmeattend(struct ie_softc *); 76 static void ie_vmerun(struct ie_softc *); 77 78 /* 79 * zero/copy functions: OBIO can use the normal functions, but VME 80 * must do only byte or half-word (16 bit) accesses... 81 */ 82 static void *wmemcpy(void *, const void *, size_t); 83 static void *wmemset(void *, int, size_t); 84 85 86 /* 87 * New-style autoconfig attachment 88 */ 89 90 static int ie_vme_match(struct device *, struct cfdata *, void *); 91 static void ie_vme_attach(struct device *, struct device *, void *); 92 93 CFATTACH_DECL(ie_vme, sizeof(struct ie_softc), 94 ie_vme_match, ie_vme_attach, NULL, NULL); 95 96 static int 97 ie_vme_match(struct device *parent, struct cfdata *cf, void *args) 98 { 99 struct confargs *ca = args; 100 101 /* No default VME address. */ 102 if (ca->ca_paddr == -1) 103 return(0); 104 105 /* Make sure something is there... */ 106 if (bus_peek(ca->ca_bustype, ca->ca_paddr, 2) == -1) 107 return (0); 108 109 /* Default interrupt priority. */ 110 if (ca->ca_intpri == -1) 111 ca->ca_intpri = 3; 112 113 return (1); 114 } 115 116 /* 117 * *note*: we don't detect the difference between a VME3E and 118 * a multibus/vme card. if you want to use a 3E you'll have 119 * to fix this. 120 */ 121 void 122 ie_vme_attach(struct device *parent, struct device *self, void *args) 123 { 124 struct ie_softc *sc = (void *) self; 125 struct confargs *ca = args; 126 volatile struct ievme *iev; 127 u_long rampaddr; 128 int lcv, off; 129 130 sc->hard_type = IE_VME; 131 sc->reset_586 = ie_vmereset; 132 sc->chan_attn = ie_vmeattend; 133 sc->run_586 = ie_vmerun; 134 sc->sc_memcpy = wmemcpy; 135 sc->sc_memset = wmemset; 136 137 /* 138 * There is 64K of memory on the VME board. 139 * (determined by hardware - NOT configurable!) 140 */ 141 sc->sc_msize = 0x10000; /* MEMSIZE 64K */ 142 143 /* Map in the board control regs. */ 144 sc->sc_reg = bus_mapin(ca->ca_bustype, ca->ca_paddr, 145 sizeof(struct ievme)); 146 iev = (volatile struct ievme *) sc->sc_reg; 147 148 /* 149 * Find and map in the board memory. 150 */ 151 /* top 12 bits */ 152 rampaddr = ca->ca_paddr & 0xfff00000; 153 /* 4 more */ 154 rampaddr |= ((iev->status & IEVME_HADDR) << 16); 155 sc->sc_maddr = bus_mapin(ca->ca_bustype, rampaddr, sc->sc_msize); 156 157 /* 158 * On this hardware, the i82586 address is just 159 * masked to 16 bits, so sc_iobase == sc_maddr 160 */ 161 sc->sc_iobase = sc->sc_maddr; 162 163 /* 164 * Set up on-board mapping registers for linear map. 165 */ 166 iev->pectrl |= IEVME_PARACK; /* clear to start */ 167 for (lcv = 0; lcv < IEVME_MAPSZ; lcv++) 168 iev->pgmap[lcv] = IEVME_SBORDR | IEVME_OBMEM | lcv; 169 (sc->sc_memset)(sc->sc_maddr, 0, sc->sc_msize); 170 171 /* 172 * Set the System Configuration Pointer (SCP). 173 * Its location is system-dependent because the 174 * i82586 reads it from a fixed physical address. 175 * On this hardware, the i82586 address is just 176 * masked down to 16 bits, so the SCP is found 177 * at the end of the RAM on the VME board. 178 */ 179 off = IE_SCP_ADDR & 0xFFFF; 180 sc->scp = (volatile void *)((char *)sc->sc_maddr + off); 181 182 /* 183 * The rest of ram is used for buffers, etc. 184 */ 185 sc->buf_area = sc->sc_maddr; 186 sc->buf_area_sz = off; 187 188 /* Set the ethernet address. */ 189 idprom_etheraddr(sc->sc_addr); 190 191 /* Do machine-independent parts of attach. */ 192 ie_attach(sc); 193 194 /* Install interrupt handler. */ 195 isr_add_vectored(ie_intr, (void *)sc, 196 ca->ca_intpri, ca->ca_intvec); 197 } 198 199 200 /* 201 * MULTIBUS/VME support 202 */ 203 204 void 205 ie_vmeattend(struct ie_softc *sc) 206 { 207 volatile struct ievme *iev = (struct ievme *) sc->sc_reg; 208 209 iev->status |= IEVME_ATTEN; /* flag! */ 210 iev->status &= ~IEVME_ATTEN; /* down. */ 211 } 212 213 void 214 ie_vmereset(struct ie_softc *sc) 215 { 216 volatile struct ievme *iev = (struct ievme *) sc->sc_reg; 217 218 iev->status = IEVME_RESET; 219 delay(20); 220 iev->status = (IEVME_ONAIR | IEVME_IENAB | IEVME_PEINT); 221 } 222 223 void 224 ie_vmerun(struct ie_softc *sc) 225 { 226 /* do it all in reset */ 227 } 228 229 /* 230 * wmemcpy/wmemset - like memcpy/memset but largest access is 16-bits, 231 * and also does byte swaps... 232 * XXX - Would be nice to have asm versions in some library... 233 */ 234 235 static void * 236 wmemset(void *vb, int val, size_t l) 237 { 238 u_char *b = vb; 239 u_char *be = b + l; 240 u_short *sp; 241 242 if (l == 0) 243 return (vb); 244 245 /* front, */ 246 if ((u_long)b & 1) 247 *b++ = val; 248 249 /* back, */ 250 if (b != be && ((u_long)be & 1) != 0) { 251 be--; 252 *be = val; 253 } 254 255 /* and middle. */ 256 sp = (u_short *)b; 257 while (sp != (u_short *)be) 258 *sp++ = val; 259 260 return (vb); 261 } 262 263 static void * 264 wmemcpy(void *dst, const void *src, size_t l) 265 { 266 const u_char *b1e, *b1 = src; 267 u_char *b2 = dst; 268 const u_short *sp; 269 int bstore = 0; 270 271 if (l == 0) 272 return (dst); 273 274 /* front, */ 275 if ((u_long)b1 & 1) { 276 *b2++ = *b1++; 277 l--; 278 } 279 280 /* middle, */ 281 sp = (const u_short *)b1; 282 b1e = b1 + l; 283 if (l & 1) 284 b1e--; 285 bstore = (u_long)b2 & 1; 286 287 while (sp < (const u_short *)b1e) { 288 if (bstore) { 289 b2[1] = *sp & 0xff; 290 b2[0] = *sp >> 8; 291 } else 292 *((short *)b2) = *sp; 293 sp++; 294 b2 += 2; 295 } 296 297 /* and back. */ 298 if (l & 1) 299 *b2 = *b1e; 300 301 return (dst); 302 } 303