if_mc.c revision 1.17
1 /* $NetBSD: if_mc.c,v 1.17 2009/03/14 21:04:11 dsl Exp $ */ 2 3 /*- 4 * Copyright (c) 1997 David Huang <khym (at) bga.com> 5 * All rights reserved. 6 * 7 * Portions of this code are based on code by Denton Gentry <denny1 (at) home.com> 8 * and Yanagisawa Takeshi <yanagisw (at) aa.ap.titech.ac.jp>. 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. The name of the author may not be used to endorse or promote products 16 * derived from this software without specific prior written permission 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 * 29 */ 30 31 /* 32 * Bus attachment and DMA routines for the mc driver (Centris/Quadra 33 * 660av and Quadra 840av onboard ethernet, based on the AMD Am79C940 34 * MACE ethernet chip). Also uses the PSC (Peripheral Subsystem 35 * Controller) for DMA to and from the MACE. 36 */ 37 38 #include <sys/cdefs.h> 39 __KERNEL_RCSID(0, "$NetBSD: if_mc.c,v 1.17 2009/03/14 21:04:11 dsl Exp $"); 40 41 #include <sys/param.h> 42 #include <sys/device.h> 43 #include <sys/malloc.h> 44 #include <sys/socket.h> 45 #include <sys/systm.h> 46 47 #include <net/if.h> 48 #include <net/if_ether.h> 49 #include <net/if_media.h> 50 51 #include <uvm/uvm_extern.h> 52 53 #include <dev/ofw/openfirm.h> 54 55 #include <machine/bus.h> 56 #include <machine/autoconf.h> 57 #include <machine/pio.h> 58 59 #include <macppc/dev/am79c950reg.h> 60 #include <macppc/dev/if_mcvar.h> 61 62 #define MC_BUFSIZE 0x800 63 64 hide int mc_match(struct device *, struct cfdata *, void *); 65 hide void mc_attach(struct device *, struct device *, void *); 66 hide void mc_init(struct mc_softc *sc); 67 hide void mc_putpacket(struct mc_softc *sc, u_int len); 68 hide int mc_dmaintr(void *arg); 69 hide void mc_reset_rxdma(struct mc_softc *sc); 70 hide void mc_reset_txdma(struct mc_softc *sc); 71 hide void mc_select_utp(struct mc_softc *sc); 72 hide void mc_select_aui(struct mc_softc *sc); 73 hide int mc_mediachange(struct mc_softc *sc); 74 hide void mc_mediastatus(struct mc_softc *sc, struct ifmediareq *); 75 76 int mc_supmedia[] = { 77 IFM_ETHER | IFM_10_T, 78 IFM_ETHER | IFM_10_5, 79 /*IFM_ETHER | IFM_AUTO,*/ 80 }; 81 82 #define N_SUPMEDIA (sizeof(mc_supmedia) / sizeof(int)); 83 84 CFATTACH_DECL(mc, sizeof(struct mc_softc), 85 mc_match, mc_attach, NULL, NULL); 86 87 hide int 88 mc_match(struct device *parent, struct cfdata *cf, void *aux) 89 { 90 struct confargs *ca = aux; 91 92 if (strcmp(ca->ca_name, "mace") != 0) 93 return 0; 94 95 /* requires 6 regs */ 96 if (ca->ca_nreg / sizeof(int) != 6) 97 return 0; 98 99 /* requires 3 intrs */ 100 if (ca->ca_nintr / sizeof(int) != 3) 101 return 0; 102 103 return 1; 104 } 105 106 hide void 107 mc_attach(struct device *parent, struct device *self, void *aux) 108 { 109 struct confargs *ca = aux; 110 struct mc_softc *sc = (struct mc_softc *)self; 111 u_int8_t myaddr[ETHER_ADDR_LEN]; 112 u_int *reg; 113 114 sc->sc_node = ca->ca_node; 115 sc->sc_regt = ca->ca_tag; 116 117 reg = ca->ca_reg; 118 reg[0] += ca->ca_baseaddr; 119 reg[2] += ca->ca_baseaddr; 120 reg[4] += ca->ca_baseaddr; 121 122 sc->sc_txdma = mapiodev(reg[2], reg[3]); 123 sc->sc_rxdma = mapiodev(reg[4], reg[5]); 124 bus_space_map(sc->sc_regt, reg[0], reg[1], 0, &sc->sc_regh); 125 126 sc->sc_tail = 0; 127 sc->sc_txdmacmd = dbdma_alloc(sizeof(dbdma_command_t) * 2); 128 sc->sc_rxdmacmd = (void *)dbdma_alloc(sizeof(dbdma_command_t) * 8); 129 memset(sc->sc_txdmacmd, 0, sizeof(dbdma_command_t) * 2); 130 memset(sc->sc_rxdmacmd, 0, sizeof(dbdma_command_t) * 8); 131 132 printf(": irq %d,%d,%d", 133 ca->ca_intr[0], ca->ca_intr[1], ca->ca_intr[2]); 134 135 if (OF_getprop(sc->sc_node, "local-mac-address", myaddr, 6) != 6) { 136 printf(": failed to get MAC address.\n"); 137 return; 138 } 139 140 /* allocate memory for transmit buffer and mark it non-cacheable */ 141 sc->sc_txbuf = malloc(PAGE_SIZE, M_DEVBUF, M_WAITOK); 142 sc->sc_txbuf_phys = kvtop(sc->sc_txbuf); 143 memset(sc->sc_txbuf, 0, PAGE_SIZE); 144 145 /* 146 * allocate memory for receive buffer and mark it non-cacheable 147 * XXX This should use the bus_dma interface, since the buffer 148 * needs to be physically contiguous. However, it seems that 149 * at least on my system, malloc() does allocate contiguous 150 * memory. If it's not, suggest reducing the number of buffers 151 * to 2, which will fit in one 4K page. 152 */ 153 sc->sc_rxbuf = malloc(MC_NPAGES * PAGE_SIZE, M_DEVBUF, M_WAITOK); 154 sc->sc_rxbuf_phys = kvtop(sc->sc_rxbuf); 155 memset(sc->sc_rxbuf, 0, MC_NPAGES * PAGE_SIZE); 156 157 if ((int)sc->sc_txbuf & PGOFSET) 158 printf("txbuf is not page-aligned\n"); 159 if ((int)sc->sc_rxbuf & PGOFSET) 160 printf("rxbuf is not page-aligned\n"); 161 162 sc->sc_bus_init = mc_init; 163 sc->sc_putpacket = mc_putpacket; 164 165 166 /* disable receive DMA */ 167 dbdma_reset(sc->sc_rxdma); 168 169 /* disable transmit DMA */ 170 dbdma_reset(sc->sc_txdma); 171 172 /* install interrupt handlers */ 173 /*intr_establish(ca->ca_intr[1], IST_EDGE, IPL_NET, mc_dmaintr, sc);*/ 174 intr_establish(ca->ca_intr[2], IST_EDGE, IPL_NET, mc_dmaintr, sc); 175 intr_establish(ca->ca_intr[0], IST_EDGE, IPL_NET, mcintr, sc); 176 177 sc->sc_biucc = XMTSP_64; 178 sc->sc_fifocc = XMTFW_16 | RCVFW_64 | XMTFWU | RCVFWU | 179 XMTBRST | RCVBRST; 180 /*sc->sc_plscc = PORTSEL_10BT;*/ 181 sc->sc_plscc = PORTSEL_GPSI | ENPLSIO; 182 183 /* mcsetup returns 1 if something fails */ 184 if (mcsetup(sc, myaddr)) { 185 printf("mcsetup returns non zero\n"); 186 return; 187 } 188 #ifdef NOTYET 189 sc->sc_mediachange = mc_mediachange; 190 sc->sc_mediastatus = mc_mediastatus; 191 sc->sc_supmedia = mc_supmedia; 192 sc->sc_nsupmedia = N_SUPMEDIA; 193 sc->sc_defaultmedia = IFM_ETHER | IFM_10_T; 194 #endif 195 } 196 197 /* Bus-specific initialization */ 198 hide void 199 mc_init(struct mc_softc *sc) 200 { 201 mc_reset_rxdma(sc); 202 mc_reset_txdma(sc); 203 } 204 205 hide void 206 mc_putpacket(struct mc_softc *sc, u_int len) 207 { 208 dbdma_command_t *cmd = sc->sc_txdmacmd; 209 210 DBDMA_BUILD(cmd, DBDMA_CMD_OUT_LAST, 0, len, sc->sc_txbuf_phys, 211 DBDMA_INT_NEVER, DBDMA_WAIT_NEVER, DBDMA_BRANCH_NEVER); 212 213 dbdma_start(sc->sc_txdma, sc->sc_txdmacmd); 214 } 215 216 /* 217 * Interrupt handler for the MACE DMA completion interrupts 218 */ 219 int 220 mc_dmaintr(void *arg) 221 { 222 struct mc_softc *sc = arg; 223 int status, offset, statoff; 224 int datalen, resid; 225 int i, n; 226 dbdma_command_t *cmd; 227 228 /* We've received some packets from the MACE */ 229 230 /* Loop through, processing each of the packets */ 231 i = sc->sc_tail; 232 for (n = 0; n < MC_RXDMABUFS; n++, i++) { 233 if (i == MC_RXDMABUFS) 234 i = 0; 235 236 cmd = &sc->sc_rxdmacmd[i]; 237 /* flushcache(cmd, sizeof(dbdma_command_t)); */ 238 status = in16rb(&cmd->d_status); 239 resid = in16rb(&cmd->d_resid); 240 241 /*if ((status & D_ACTIVE) == 0)*/ 242 if ((status & 0x40) == 0) 243 continue; 244 245 #if 1 246 if (in16rb(&cmd->d_count) != ETHERMTU + 22) 247 printf("bad d_count\n"); 248 #endif 249 250 datalen = in16rb(&cmd->d_count) - resid; 251 datalen -= 4; /* 4 == status bytes */ 252 253 if (datalen < 4 + sizeof(struct ether_header)) { 254 printf("short packet len=%d\n", datalen); 255 /* continue; */ 256 goto next; 257 } 258 259 offset = i * MC_BUFSIZE; 260 statoff = offset + datalen; 261 262 DBDMA_BUILD_CMD(cmd, DBDMA_CMD_STOP, 0, 0, 0, 0); 263 __asm volatile("eieio"); 264 265 /* flushcache(sc->sc_rxbuf + offset, datalen + 4); */ 266 267 sc->sc_rxframe.rx_rcvcnt = sc->sc_rxbuf[statoff + 0]; 268 sc->sc_rxframe.rx_rcvsts = sc->sc_rxbuf[statoff + 1]; 269 sc->sc_rxframe.rx_rntpc = sc->sc_rxbuf[statoff + 2]; 270 sc->sc_rxframe.rx_rcvcc = sc->sc_rxbuf[statoff + 3]; 271 sc->sc_rxframe.rx_frame = sc->sc_rxbuf + offset; 272 273 mc_rint(sc); 274 275 next: 276 DBDMA_BUILD_CMD(cmd, DBDMA_CMD_IN_LAST, 0, DBDMA_INT_ALWAYS, 277 DBDMA_WAIT_NEVER, DBDMA_BRANCH_NEVER); 278 __asm volatile("eieio"); 279 cmd->d_status = 0; 280 cmd->d_resid = 0; 281 sc->sc_tail = i + 1; 282 } 283 284 dbdma_continue(sc->sc_rxdma); 285 286 return 1; 287 } 288 289 hide void 290 mc_reset_rxdma(struct mc_softc *sc) 291 { 292 dbdma_command_t *cmd = sc->sc_rxdmacmd; 293 dbdma_regmap_t *dmareg = sc->sc_rxdma; 294 int i; 295 u_int8_t maccc; 296 297 /* Disable receiver, reset the DMA channels */ 298 maccc = NIC_GET(sc, MACE_MACCC); 299 NIC_PUT(sc, MACE_MACCC, maccc & ~ENRCV); 300 301 dbdma_reset(dmareg); 302 303 for (i = 0; i < MC_RXDMABUFS; i++) { 304 DBDMA_BUILD(cmd, DBDMA_CMD_IN_LAST, 0, ETHERMTU + 22, 305 sc->sc_rxbuf_phys + MC_BUFSIZE * i, DBDMA_INT_ALWAYS, 306 DBDMA_WAIT_NEVER, DBDMA_BRANCH_NEVER); 307 cmd++; 308 } 309 310 DBDMA_BUILD(cmd, DBDMA_CMD_NOP, 0, 0, 0, 311 DBDMA_INT_NEVER, DBDMA_WAIT_NEVER, DBDMA_BRANCH_ALWAYS); 312 out32rb(&cmd->d_cmddep, kvtop((void *)sc->sc_rxdmacmd)); 313 cmd++; 314 315 dbdma_start(dmareg, sc->sc_rxdmacmd); 316 317 sc->sc_tail = 0; 318 319 /* Reenable receiver, reenable DMA */ 320 NIC_PUT(sc, MACE_MACCC, maccc); 321 } 322 323 hide void 324 mc_reset_txdma(struct mc_softc *sc) 325 { 326 dbdma_command_t *cmd = sc->sc_txdmacmd; 327 dbdma_regmap_t *dmareg = sc->sc_txdma; 328 u_int8_t maccc; 329 330 /* disable transmitter */ 331 maccc = NIC_GET(sc, MACE_MACCC); 332 NIC_PUT(sc, MACE_MACCC, maccc & ~ENXMT); 333 334 dbdma_reset(dmareg); 335 336 DBDMA_BUILD(cmd, DBDMA_CMD_OUT_LAST, 0, 0, sc->sc_txbuf_phys, 337 DBDMA_INT_NEVER, DBDMA_WAIT_NEVER, DBDMA_BRANCH_NEVER); 338 cmd++; 339 DBDMA_BUILD(cmd, DBDMA_CMD_STOP, 0, 0, 0, 340 DBDMA_INT_NEVER, DBDMA_WAIT_NEVER, DBDMA_BRANCH_NEVER); 341 342 out32rb(&dmareg->d_cmdptrhi, 0); 343 out32rb(&dmareg->d_cmdptrlo, kvtop((void *)sc->sc_txdmacmd)); 344 345 /* restore old value */ 346 NIC_PUT(sc, MACE_MACCC, maccc); 347 } 348 349 void 350 mc_select_utp(struct mc_softc *sc) 351 { 352 sc->sc_plscc = PORTSEL_GPSI | ENPLSIO; 353 } 354 355 void 356 mc_select_aui(struct mc_softc *sc) 357 { 358 sc->sc_plscc = PORTSEL_AUI; 359 } 360 361 int 362 mc_mediachange(struct mc_softc *sc) 363 { 364 struct ifmedia *ifm = &sc->sc_media; 365 366 if (IFM_TYPE(ifm->ifm_media) != IFM_ETHER) 367 return EINVAL; 368 369 switch (IFM_SUBTYPE(ifm->ifm_media)) { 370 371 case IFM_10_T: 372 mc_select_utp(sc); 373 break; 374 375 case IFM_10_5: 376 mc_select_aui(sc); 377 break; 378 379 default: 380 return EINVAL; 381 } 382 383 return 0; 384 } 385 386 void 387 mc_mediastatus(struct mc_softc *sc, struct ifmediareq *ifmr) 388 { 389 if (sc->sc_plscc == PORTSEL_AUI) 390 ifmr->ifm_active = IFM_ETHER | IFM_10_5; 391 else 392 ifmr->ifm_active = IFM_ETHER | IFM_10_T; 393 } 394
Indexes created Mon Oct 13 01:09:56 GMT 2025