1 #include "u.h" 2 #include "../port/lib.h" 3 #include "mem.h" 4 #include "dat.h" 5 #include "fns.h" 6 #include "io.h" 7 #include "../port/error.h" 8 #include "../port/netif.h" 9 10 #include "etherif.h" 11 #include "ether8390.h" 12 13 /* 14 * Driver written for the 'Notebook Computer Ethernet LAN Adapter', 15 * a plug-in to the bus-slot on the rear of the Gateway NOMAD 425DXL 16 * laptop. The manual says NE2000 compatible. 17 * The interface appears to be pretty well described in the National 18 * Semiconductor Local Area Network Databook (1992) as one of the 19 * AT evaluation cards. 20 * 21 * The NE2000 is really just a DP8390[12] plus a data port 22 * and a reset port. 23 */ 24 enum { 25 Data = 0x10, /* offset from I/O base of data port */ 26 Reset = 0x1F, /* offset from I/O base of reset port */ 27 }; 28 29 typedef struct Ctlr Ctlr; 30 typedef struct Ctlr { 31 Pcidev* pcidev; 32 Ctlr* next; 33 int active; 34 } Ctlr; 35 36 static Ctlr* ctlrhead; 37 static Ctlr* ctlrtail; 38 39 static struct { 40 char* name; 41 int id; 42 } ne2000pci[] = { 43 { "Realtek 8029", (0x8029<<16)|0x10EC, }, 44 { "Winbond 89C940", (0x0940<<16)|0x1050, }, 45 { nil }, 46 }; 47 48 static Ctlr* 49 ne2000match(Ether* edev, int id) 50 { 51 int port; 52 Pcidev *p; 53 Ctlr *ctlr; 54 55 /* 56 * Any adapter matches if no edev->port is supplied, 57 * otherwise the ports must match. 58 */ 59 for(ctlr = ctlrhead; ctlr != nil; ctlr = ctlr->next){ 60 if(ctlr->active) 61 continue; 62 p = ctlr->pcidev; 63 if(((p->did<<16)|p->vid) != id) 64 continue; 65 port = p->mem[0].bar & ~0x01; 66 if(edev->port != 0 && edev->port != port) 67 continue; 68 69 /* 70 * It suffices to fill these in, 71 * the rest is gleaned from the card. 72 */ 73 edev->port = port; 74 edev->irq = p->intl; 75 76 ctlr->active = 1; 77 78 return ctlr; 79 } 80 81 return nil; 82 } 83 84 static void 85 ne2000pnp(Ether* edev) 86 { 87 int i, id; 88 Pcidev *p; 89 Ctlr *ctlr; 90 91 /* 92 * Make a list of all ethernet controllers 93 * if not already done. 94 */ 95 if(ctlrhead == nil){ 96 p = nil; 97 while(p = pcimatch(p, 0, 0)){ 98 if(p->ccrb != 0x02 || p->ccru != 0) 99 continue; 100 ctlr = malloc(sizeof(Ctlr)); 101 ctlr->pcidev = p; 102 103 if(ctlrhead != nil) 104 ctlrtail->next = ctlr; 105 else 106 ctlrhead = ctlr; 107 ctlrtail = ctlr; 108 } 109 } 110 111 /* 112 * Is it a card with an unrecognised vid+did? 113 * Normally a search is made through all the found controllers 114 * for one which matches any of the known vid+did pairs. 115 * If a vid+did pair is specified a search is made for that 116 * specific controller only. 117 */ 118 id = 0; 119 for(i = 0; i < edev->nopt; i++){ 120 if(cistrncmp(edev->opt[i], "id=", 3) == 0) 121 id = strtol(&edev->opt[i][3], nil, 0); 122 } 123 124 if(id != 0) 125 ne2000match(edev, id); 126 else for(i = 0; ne2000pci[i].name; i++){ 127 if(ne2000match(edev, ne2000pci[i].id) != nil) 128 break; 129 } 130 } 131 132 static int 133 ne2000reset(Ether* edev) 134 { 135 ushort buf[16]; 136 ulong port; 137 Dp8390 *dp8390; 138 int i; 139 uchar ea[Eaddrlen]; 140 141 if(edev->port == 0) 142 ne2000pnp(edev); 143 144 /* 145 * Set up the software configuration. 146 * Use defaults for irq, mem and size 147 * if not specified. 148 * Must have a port, no more default. 149 */ 150 if(edev->port == 0) 151 return -1; 152 if(edev->irq == 0) 153 edev->irq = 2; 154 if(edev->mem == 0) 155 edev->mem = 0x4000; 156 if(edev->size == 0) 157 edev->size = 16*1024; 158 port = edev->port; 159 160 if(ioalloc(edev->port, 0x20, 0, "ne2000") < 0) 161 return -1; 162 163 edev->ctlr = malloc(sizeof(Dp8390)); 164 dp8390 = edev->ctlr; 165 dp8390->width = 2; 166 dp8390->ram = 0; 167 168 dp8390->port = port; 169 dp8390->data = port+Data; 170 171 dp8390->tstart = HOWMANY(edev->mem, Dp8390BufSz); 172 dp8390->pstart = dp8390->tstart + HOWMANY(sizeof(Etherpkt), Dp8390BufSz); 173 dp8390->pstop = dp8390->tstart + HOWMANY(edev->size, Dp8390BufSz); 174 175 dp8390->dummyrr = 1; 176 for(i = 0; i < edev->nopt; i++){ 177 if(strcmp(edev->opt[i], "nodummyrr")) 178 continue; 179 dp8390->dummyrr = 0; 180 break; 181 } 182 183 /* 184 * Reset the board. This is done by doing a read 185 * followed by a write to the Reset address. 186 */ 187 buf[0] = inb(port+Reset); 188 delay(2); 189 outb(port+Reset, buf[0]); 190 delay(2); 191 192 /* 193 * Init the (possible) chip, then use the (possible) 194 * chip to read the (possible) PROM for ethernet address 195 * and a marker byte. 196 * Could just look at the DP8390 command register after 197 * initialisation has been tried, but that wouldn't be 198 * enough, there are other ethernet boards which could 199 * match. 200 * Parallels has buf[0x0E] == 0x00 whereas real hardware 201 * usually has 0x57. 202 */ 203 dp8390reset(edev); 204 memset(buf, 0, sizeof(buf)); 205 dp8390read(dp8390, buf, 0, sizeof(buf)); 206 i = buf[0x0E] & 0xFF; 207 if((i != 0x00 && i != 0x57) || (buf[0x0F] & 0xFF) != 0x57){ 208 iofree(edev->port); 209 free(edev->ctlr); 210 return -1; 211 } 212 213 /* 214 * Stupid machine. Shorts were asked for, 215 * shorts were delivered, although the PROM is a byte array. 216 * Set the ethernet address. 217 */ 218 memset(ea, 0, Eaddrlen); 219 if(memcmp(ea, edev->ea, Eaddrlen) == 0){ 220 for(i = 0; i < sizeof(edev->ea); i++) 221 edev->ea[i] = buf[i]; 222 } 223 dp8390setea(edev); 224 225 return 0; 226 } 227 228 void 229 ether2000link(void) 230 { 231 addethercard("NE2000", ne2000reset); 232 } 233