Compaq AA-RNG2A-TE manual Handling First-Time Probe Operations

5.1.9 Handling First-Time Probe Operations

If the device has not already been probed, the el_probe( ) routine performs the following tasks:

•Reads the EEPROM and saves it to a temporary data structure

•Reads and saves the device’s physical address

•Starts the autosense thread to determine the media type

The following code shows how the el_probe( ) routine performs these tasks:

if (!sc->reprobe) {

1

if (multi_func_flag) {

2

bzero((caddr_t)&tuple_data, sizeof(struct tuple_data_info)); tuple_data_infop = &tuple_data;

tuple_infop = (struct tuple_info *)&tuple_data;

tuple_infop->socket = (short) card_infop->socket_vnum; tuple_infop->attributes = 0; tuple_infop->DesiredTuple = 0x88;

status = GetFirstTuple(tuple_infop);

if (status == SUCCESS) { tuple_data_infop->TupleOffset = 0;

tuple_data_infop->TupleDataMax = (u_short)TUPLE_DATA_MAX; status = GetTupleData(tuple_data_infop);

if (status == SUCCESS) {

ee = (unsigned char *)&sc->eeprom;

for (i = 0; i < (sizeof(struct w3_eeprom)); i++) { *ee = tuple_data_infop->TupleData[i];

ee++;

}

} else {

printf("el%d: Can’t read multifunction card’s eeprom.\n", unit);

if (sc->ispcmcia) pcmcia_unregister_event_callback(card_infop->socket_vnum,

CARD_REMOVAL_EVENT, (caddr_t)el_card_remove);

if_dealloc(sc->is_ed); lan_ehm_free(&sc->ehm); FREE(sc, M_DEVBUF); return(0);

}

} else {

printf("el%d: Can’t read multifunction card’s eeprom.\n", unit);

if (sc->ispcmcia) pcmcia_unregister_event_callback(card_infop->socket_vnum,

CARD_REMOVAL_EVENT, (caddr_t)el_card_remove);

if_dealloc(sc->is_ed); lan_ehm_free(&sc->ehm); FREE(sc, M_DEVBUF); return(0);

}

} else {

3

ed = (unsigned short *)&sc->eeprom;

5–10Implementing the Autoconfiguration Support Section (probe)