le_elb.c revision 1.1
1 /* $NetBSD: le_elb.c,v 1.1 2003/03/11 10:57:57 hannken Exp $ */ 2 3 /*- 4 * Copyright (c) 2003 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Juergen Hannken-Illjes. 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 #include <sys/param.h> 40 #include <sys/conf.h> 41 #include <sys/device.h> 42 #include <sys/systm.h> 43 44 #include <uvm/uvm_extern.h> 45 46 #include <machine/bus.h> 47 48 #include <net/if.h> 49 #include <net/if_ether.h> 50 #include <net/if_media.h> 51 52 #include <dev/ic/lancereg.h> 53 #include <dev/ic/lancevar.h> 54 #include <dev/ic/am79900reg.h> 55 #include <dev/ic/am79900var.h> 56 57 #include <evbppc/explora/dev/elbvar.h> 58 59 #define LE_MEMSIZE 16384 60 #define LE_RDP 0x10 /* Indirect data register. */ 61 #define LE_RAP 0x14 /* Indirect address register. */ 62 #define LE_NPORTS 32 63 64 struct le_elb_softc { 65 struct am79900_softc sc_am79900; 66 bus_dma_tag_t sc_dmat; 67 bus_dmamap_t sc_dmam; 68 bus_space_tag_t sc_iot; 69 bus_space_handle_t sc_ioh; 70 void *sc_ih; 71 }; 72 73 static int le_elb_probe(struct device *, struct cfdata *, void *); 74 static void le_elb_attach(struct device *, struct device *, void *); 75 static u_int16_t le_rdcsr(struct lance_softc *, u_int16_t); 76 static void le_wrcsr(struct lance_softc *, u_int16_t, u_int16_t); 77 static void le_copytodesc(struct lance_softc *, void *, int, int); 78 static void le_copyfromdesc(struct lance_softc *, void *, int, int); 79 80 CFATTACH_DECL(le_elb, sizeof(struct le_elb_softc), 81 le_elb_probe, le_elb_attach, NULL, NULL); 82 83 int 84 le_elb_probe(struct device *parent, struct cfdata *cf, void *aux) 85 { 86 struct elb_attach_args *oaa = aux; 87 88 if (strcmp(oaa->elb_name, cf->cf_name) != 0) 89 return 0; 90 91 return (1); 92 } 93 94 void 95 le_elb_attach(struct device *parent, struct device *self, void *aux) 96 { 97 struct le_elb_softc *msc = (void *)self; 98 struct lance_softc *sc = &msc->sc_am79900.lsc; 99 struct elb_attach_args *eaa = aux; 100 bus_dma_segment_t seg; 101 int i, rseg; 102 103 printf("\n"); 104 105 if (booted_device == NULL) /*XXX*/ 106 booted_device = self; 107 108 msc->sc_iot = eaa->elb_bt; 109 msc->sc_dmat = eaa->elb_dmat; 110 111 bus_space_map(msc->sc_iot, eaa->elb_base, LE_NPORTS, 0, &msc->sc_ioh); 112 113 /* 114 * Allocate a DMA area for the card. 115 */ 116 if (bus_dmamem_alloc(msc->sc_dmat, LE_MEMSIZE, PAGE_SIZE, 0, 117 &seg, 1, &rseg, BUS_DMA_NOWAIT)) { 118 printf("%s: couldn't allocate memory for card\n", 119 sc->sc_dev.dv_xname); 120 return; 121 } 122 if (bus_dmamem_map(msc->sc_dmat, &seg, rseg, LE_MEMSIZE, 123 (caddr_t *)&sc->sc_mem, 124 BUS_DMA_NOWAIT|BUS_DMA_COHERENT)) { 125 printf("%s: couldn't map memory for card\n", 126 sc->sc_dev.dv_xname); 127 return; 128 } 129 130 /* 131 * Create and load the DMA map for the DMA area. 132 */ 133 if (bus_dmamap_create(msc->sc_dmat, LE_MEMSIZE, 1, 134 LE_MEMSIZE, 0, BUS_DMA_NOWAIT, &msc->sc_dmam)) { 135 printf("%s: couldn't create DMA map\n", 136 sc->sc_dev.dv_xname); 137 bus_dmamem_free(msc->sc_dmat, &seg, rseg); 138 return; 139 } 140 if (bus_dmamap_load(msc->sc_dmat, msc->sc_dmam, 141 sc->sc_mem, LE_MEMSIZE, NULL, BUS_DMA_NOWAIT)) { 142 printf("%s: coundn't load DMA map\n", 143 sc->sc_dev.dv_xname); 144 bus_dmamem_free(msc->sc_dmat, &seg, rseg); 145 return; 146 } 147 148 /* 149 * This is magic -- DMA doesn't work without address 150 * bit 30 set to one. 151 */ 152 sc->sc_addr = 0x40000000 | msc->sc_dmam->dm_segs[0].ds_addr; 153 sc->sc_memsize = LE_MEMSIZE; 154 155 sc->sc_copytodesc = le_copytodesc; 156 sc->sc_copyfromdesc = le_copyfromdesc; 157 sc->sc_copytobuf = lance_copytobuf_contig; 158 sc->sc_copyfrombuf = lance_copyfrombuf_contig; 159 sc->sc_zerobuf = lance_zerobuf_contig; 160 161 sc->sc_rdcsr = le_rdcsr; 162 sc->sc_wrcsr = le_wrcsr; 163 164 printf("%s", sc->sc_dev.dv_xname); 165 166 /* Save the MAC address. */ 167 for (i = 0; i < 3; i++) { 168 sc->sc_enaddr[i*2] = le_rdcsr(sc, 12+i); 169 sc->sc_enaddr[i*2+1] = le_rdcsr(sc, 12+i) >> 8; 170 } 171 172 am79900_config(&msc->sc_am79900); 173 174 /* Chip is stopped. Set "software style" to 32-bit. */ 175 le_wrcsr(sc, LE_CSR58, 2); 176 177 intr_establish(eaa->elb_irq, IST_LEVEL, IPL_NET, am79900_intr, sc); 178 } 179 180 /* 181 * Read from an indirect CSR. 182 */ 183 static u_int16_t 184 le_rdcsr(struct lance_softc *sc, u_int16_t reg) 185 { 186 struct le_elb_softc *lesc = (struct le_elb_softc *)sc; 187 bus_space_tag_t iot = lesc->sc_iot; 188 bus_space_handle_t ioh = lesc->sc_ioh; 189 u_int16_t val; 190 191 bus_space_write_4(iot, ioh, LE_RAP, reg); 192 val = bus_space_read_4(iot, ioh, LE_RDP); 193 194 return(val); 195 } 196 197 /* 198 * Write to an indirect CSR. 199 */ 200 static void 201 le_wrcsr(struct lance_softc *sc, u_int16_t reg, u_int16_t val) 202 { 203 struct le_elb_softc *lesc = (struct le_elb_softc *)sc; 204 bus_space_tag_t iot = lesc->sc_iot; 205 bus_space_handle_t ioh = lesc->sc_ioh; 206 207 bus_space_write_4(iot, ioh, LE_RAP, reg); 208 bus_space_write_4(iot, ioh, LE_RDP, val); 209 } 210 211 /* 212 * Copy data to memory and swap bytes. 213 */ 214 static void 215 le_copytodesc(struct lance_softc *sc, void *from, int boff, int len) 216 { 217 volatile u_int32_t *src = from; 218 volatile u_int32_t *dst = (u_int32_t *)((u_char *)sc->sc_mem+boff); 219 220 /* XXX lance_setladrf should be modified to use u_int32_t instead. 221 * The init block contains u_int16_t values that require 222 * special swapping. 223 */ 224 if (boff == LE_INITADDR(sc) && len == sizeof(struct leinit)) { 225 src[3] = (src[3] >> 16) | (src[3] << 16); 226 src[4] = (src[4] >> 16) | (src[4] << 16); 227 } 228 229 len /= sizeof(u_int32_t); 230 while (len-- > 0) 231 *dst++ = bswap32(*src++); 232 } 233 234 /* 235 * Copy data from memory and swap bytes. 236 */ 237 static void 238 le_copyfromdesc(struct lance_softc *sc, void *to, int boff, int len) 239 { 240 volatile u_int32_t *src = (u_int32_t *)((u_char *)sc->sc_mem+boff); 241 volatile u_int32_t *dst = to; 242 243 len /= sizeof(u_int32_t); 244 while (len-- > 0) 245 *dst++ = bswap32(*src++); 246 } 247
Indexes created Tue Sep 30 07:10:03 GMT 2025