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- #include "u.h"
- #include "lib.h"
- #include "mem.h"
- #include "dat.h"
- #include "fns.h"
- #include "io.h"
- #include "etherif.h"
- #include "ether8390.h"
- /*
- * Driver written for the 'Notebook Computer Ethernet LAN Adapter',
- * a plug-in to the bus-slot on the rear of the Gateway NOMAD 425DXL
- * laptop. The manual says NE2000 compatible.
- * The interface appears to be pretty well described in the National
- * Semiconductor Local Area Network Databook (1992) as one of the
- * AT evaluation cards.
- *
- * The NE2000 is really just a DP8390[12] plus a data port
- * and a reset port.
- */
- enum {
- Data = 0x10, /* offset from I/O base of data port */
- Reset = 0x1F, /* offset from I/O base of reset port */
- };
- int
- ne2000reset(Ether* ether)
- {
- ushort buf[16];
- ulong port;
- Dp8390 *ctlr;
- int i;
- uchar ea[Eaddrlen];
- /*
- * Set up the software configuration.
- * Use defaults for port, irq, mem and size
- * if not specified.
- */
- if(ether->port == 0)
- ether->port = 0x300;
- if(ether->irq == 0)
- ether->irq = 2;
- if(ether->mem == 0)
- ether->mem = 0x4000;
- if(ether->size == 0)
- ether->size = 16*1024;
- port = ether->port;
- ether->ctlr = malloc(sizeof(Dp8390));
- ctlr = ether->ctlr;
- ctlr->width = 2;
- ctlr->ram = 0;
- ctlr->port = port;
- ctlr->data = port+Data;
- ctlr->tstart = HOWMANY(ether->mem, Dp8390BufSz);
- ctlr->pstart = ctlr->tstart + HOWMANY(sizeof(Etherpkt), Dp8390BufSz);
- ctlr->pstop = ctlr->tstart + HOWMANY(ether->size, Dp8390BufSz);
- ctlr->dummyrr = 1;
- for(i = 0; i < ether->nopt; i++){
- if(strcmp(ether->opt[i], "nodummyrr"))
- continue;
- ctlr->dummyrr = 0;
- break;
- }
- /*
- * Reset the board. This is done by doing a read
- * followed by a write to the Reset address.
- */
- buf[0] = inb(port+Reset);
- delay(2);
- outb(port+Reset, buf[0]);
- delay(2);
-
- /*
- * Init the (possible) chip, then use the (possible)
- * chip to read the (possible) PROM for ethernet address
- * and a marker byte.
- * Could just look at the DP8390 command register after
- * initialisation has been tried, but that wouldn't be
- * enough, there are other ethernet boards which could
- * match.
- */
- dp8390reset(ether);
- memset(buf, 0, sizeof(buf));
- dp8390read(ctlr, buf, 0, sizeof(buf));
- if((buf[0x0E] & 0xFF) != 0x57 || (buf[0x0F] & 0xFF) != 0x57){
- free(ether->ctlr);
- return -1;
- }
- /*
- * Stupid machine. Shorts were asked for,
- * shorts were delivered, although the PROM is a byte array.
- * Set the ethernet address.
- */
- memset(ea, 0, Eaddrlen);
- if(memcmp(ea, ether->ea, Eaddrlen) == 0){
- for(i = 0; i < sizeof(ether->ea); i++)
- ether->ea[i] = buf[i];
- }
- dp8390setea(ether);
- return 0;
- }
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