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 static int first; 136 ushort buf[16]; 137 ulong port; 138 Dp8390 *dp8390; 139 int i; 140 uchar ea[Eaddrlen]; 141 142 if(edev->port == 0) 143 ne2000pnp(edev); 144 145 /* 146 * Set up the software configuration. 147 * Use defaults for irq, mem and size 148 * if not specified. 149 * Must have a port, no more default. 150 */ 151 if(edev->port == 0) 152 return -1; 153 if(edev->irq == 0) 154 edev->irq = 2; 155 if(edev->mem == 0) 156 edev->mem = 0x4000; 157 if(edev->size == 0) 158 edev->size = 16*1024; 159 port = edev->port; 160 161 if(ioalloc(edev->port, 0x20, 0, "ne2000") < 0) 162 return -1; 163 164 edev->ctlr = malloc(sizeof(Dp8390)); 165 dp8390 = edev->ctlr; 166 dp8390->width = 2; 167 dp8390->ram = 0; 168 169 dp8390->port = port; 170 dp8390->data = port+Data; 171 172 dp8390->tstart = HOWMANY(edev->mem, Dp8390BufSz); 173 dp8390->pstart = dp8390->tstart + HOWMANY(sizeof(Etherpkt), Dp8390BufSz); 174 dp8390->pstop = dp8390->tstart + HOWMANY(edev->size, Dp8390BufSz); 175 176 dp8390->dummyrr = 1; 177 for(i = 0; i < edev->nopt; i++){ 178 if(strcmp(edev->opt[i], "nodummyrr")) 179 continue; 180 dp8390->dummyrr = 0; 181 break; 182 } 183 184 /* 185 * Reset the board. This is done by doing a read 186 * followed by a write to the Reset address. 187 */ 188 buf[0] = inb(port+Reset); 189 delay(2); 190 outb(port+Reset, buf[0]); 191 delay(2); 192 193 /* 194 * Init the (possible) chip, then use the (possible) 195 * chip to read the (possible) PROM for ethernet address 196 * and a marker byte. 197 * Could just look at the DP8390 command register after 198 * initialisation has been tried, but that wouldn't be 199 * enough, there are other ethernet boards which could 200 * match. 201 */ 202 dp8390reset(edev); 203 memset(buf, 0, sizeof(buf)); 204 dp8390read(dp8390, buf, 0, sizeof(buf)); 205 if((buf[0x0E] & 0xFF) != 0x57 || (buf[0x0F] & 0xFF) != 0x57){ 206 iofree(edev->port); 207 free(edev->ctlr); 208 return -1; 209 } 210 211 /* 212 * Stupid machine. Shorts were asked for, 213 * shorts were delivered, although the PROM is a byte array. 214 * Set the ethernet address. 215 */ 216 memset(ea, 0, Eaddrlen); 217 if(memcmp(ea, edev->ea, Eaddrlen) == 0){ 218 for(i = 0; i < sizeof(edev->ea); i++) 219 edev->ea[i] = buf[i]; 220 } 221 dp8390setea(edev); 222 223 return 0; 224 } 225 226 void 227 ether2000link(void) 228 { 229 addethercard("NE2000", ne2000reset); 230 } 231