1 /* $NetBSD: if_ae.c,v 1.71 2001/11/10 21:32:33 jklos Exp $ */ 2 3 /* 4 * Device driver for National Semiconductor DS8390/WD83C690 based ethernet 5 * adapters. 6 * 7 * Copyright (c) 1994, 1995 Charles M. Hannum. All rights reserved. 8 * 9 * Copyright (C) 1993, David Greenman. This software may be used, modified, 10 * copied, distributed, and sold, in both source and binary form provided that 11 * the above copyright and these terms are retained. Under no circumstances is 12 * the author responsible for the proper functioning of this software, nor does 13 * the author assume any responsibility for damages incurred with its use. 14 */ 15 16 #include "bpfilter.h" 17 18 #include <sys/param.h> 19 #include <sys/systm.h> 20 #include <sys/device.h> 21 #include <sys/mbuf.h> 22 #include <sys/socket.h> 23 24 #include <net/if.h> 25 #include <net/if_media.h> 26 #include <net/if_ether.h> 27 28 #include <machine/bus.h> 29 30 #include <dev/ic/dp8390reg.h> 31 #include <dev/ic/dp8390var.h> 32 #include <mac68k/dev/if_aevar.h> 33 34 int 35 ae_size_card_memory(bst, bsh, ofs) 36 bus_space_tag_t bst; 37 bus_space_handle_t bsh; 38 int ofs; 39 { 40 int i1, i2, i3, i4, i8; 41 42 /* 43 * banks; also assume it will generally mirror in upper banks 44 * if not installed. 45 */ 46 i1 = (8192 * 0); 47 i2 = (8192 * 1); 48 i3 = (8192 * 2); 49 i4 = (8192 * 3); 50 51 i8 = (8192 * 4); 52 53 bus_space_write_2(bst, bsh, ofs + i8, 0x8888); 54 bus_space_write_2(bst, bsh, ofs + i4, 0x4444); 55 bus_space_write_2(bst, bsh, ofs + i3, 0x3333); 56 bus_space_write_2(bst, bsh, ofs + i2, 0x2222); 57 bus_space_write_2(bst, bsh, ofs + i1, 0x1111); 58 59 /* 60 * 1) If the memory range is decoded completely, it does not 61 * matter what we write first: High tags written into 62 * the void are lost. 63 * 2) If the memory range is not decoded completely (banks are 64 * mirrored), high tags are overwritten by lower ones. 65 * 3) Lazy implementation of pathological cases - none found yet. 66 */ 67 68 if (bus_space_read_2(bst, bsh, ofs + i1) == 0x1111 && 69 bus_space_read_2(bst, bsh, ofs + i2) == 0x2222 && 70 bus_space_read_2(bst, bsh, ofs + i3) == 0x3333 && 71 bus_space_read_2(bst, bsh, ofs + i4) == 0x4444 && 72 bus_space_read_2(bst, bsh, ofs + i8) == 0x8888) 73 return 8192 * 8; 74 75 if (bus_space_read_2(bst, bsh, ofs + i1) == 0x1111 && 76 bus_space_read_2(bst, bsh, ofs + i2) == 0x2222 && 77 bus_space_read_2(bst, bsh, ofs + i3) == 0x3333 && 78 bus_space_read_2(bst, bsh, ofs + i4) == 0x4444) 79 return 8192 * 4; 80 81 if ((bus_space_read_2(bst, bsh, ofs + i1) == 0x1111 && 82 bus_space_read_2(bst, bsh, ofs + i2) == 0x2222) || 83 (bus_space_read_2(bst, bsh, ofs + i1) == 0x3333 && 84 bus_space_read_2(bst, bsh, ofs + i2) == 0x4444)) 85 return 8192 * 2; 86 87 if (bus_space_read_2(bst, bsh, ofs + i1) == 0x1111 || 88 bus_space_read_2(bst, bsh, ofs + i1) == 0x4444) 89 return 8192; 90 91 return 0; 92 } 93 94 /* 95 * Zero memory and verify that it is clear. The only difference between 96 * this and the default test_mem function is that the DP8390-based NuBus 97 * cards * apparently require word-wide writes and byte-wide reads, an 98 * `interesting' combination. 99 */ 100 int 101 ae_test_mem(sc) 102 struct dp8390_softc *sc; 103 { 104 bus_space_tag_t buft = sc->sc_buft; 105 bus_space_handle_t bufh = sc->sc_bufh; 106 int i; 107 108 bus_space_set_region_2(buft, bufh, sc->mem_start, 0, 109 sc->mem_size / 2); 110 111 for (i = 0; i < sc->mem_size; ++i) { 112 if (bus_space_read_1(sc->sc_buft, sc->sc_bufh, i)) { 113 printf(": failed to clear NIC buffer at offset %x - " 114 "check configuration\n", (sc->mem_start + i)); 115 return 1; 116 } 117 } 118 119 return 0; 120 } 121 122 /* 123 * Copy packet from mbuf to the board memory Currently uses an extra 124 * buffer/extra memory copy, unless the whole packet fits in one mbuf. 125 * 126 * As in the test_mem function, we use word-wide writes. 127 */ 128 int 129 ae_write_mbuf(sc, m, buf) 130 struct dp8390_softc *sc; 131 struct mbuf *m; 132 int buf; 133 { 134 u_char *data, savebyte[2]; 135 int len, wantbyte; 136 u_short totlen = 0; 137 138 wantbyte = 0; 139 140 for (; m ; m = m->m_next) { 141 data = mtod(m, u_char *); 142 len = m->m_len; 143 totlen += len; 144 if (len > 0) { 145 /* Finish the last word. */ 146 if (wantbyte) { 147 savebyte[1] = *data; 148 bus_space_write_region_2(sc->sc_buft, 149 sc->sc_bufh, buf, (u_int16_t *)savebyte, 1); 150 buf += 2; 151 data++; 152 len--; 153 wantbyte = 0; 154 } 155 /* Output contiguous words. */ 156 if (len > 1) { 157 bus_space_write_region_2( 158 sc->sc_buft, sc->sc_bufh, 159 buf, (u_int16_t *)data, len >> 1); 160 buf += len & ~1; 161 data += len & ~1; 162 len &= 1; 163 } 164 /* Save last byte, if necessary. */ 165 if (len == 1) { 166 savebyte[0] = *data; 167 wantbyte = 1; 168 } 169 } 170 } 171 172 if (wantbyte) { 173 savebyte[1] = 0; 174 bus_space_write_region_2(sc->sc_buft, sc->sc_bufh, 175 buf, (u_int16_t *)savebyte, 1); 176 } 177 return (totlen); 178 } 179