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- #include "string.h"
- #include "io.h"
- #include "timer.h"
- #include "console.h"
- #include "dev.h"
- #include "eisa.h"
-
- /*
- * Increment a bus_loc structure to the next possible EISA location.
- * Leave the structure zeroed and return 0 if there are no more valid
- * locations.
- *
- */
- static int eisa_next_location ( struct bus_loc *bus_loc ) {
- struct eisa_loc *eisa_loc = ( struct eisa_loc * ) bus_loc;
-
- /*
- * Ensure that there is sufficient space in the shared bus
- * structures for a struct isa_loc and a struct
- * isa_dev, as mandated by bus.h.
- *
- */
- BUS_LOC_CHECK ( struct eisa_loc );
- BUS_DEV_CHECK ( struct eisa_device );
-
- return ( eisa_loc->slot = ( ++eisa_loc->slot & EISA_MAX_SLOT ) );
- }
-
- /*
- * Fill in parameters for an EISA device based on slot number
- *
- * Return 1 if device present, 0 otherwise
- *
- */
- static int eisa_fill_device ( struct bus_dev *bus_dev,
- struct bus_loc *bus_loc ) {
- struct eisa_loc *eisa_loc = ( struct eisa_loc * ) bus_loc;
- struct eisa_device *eisa = ( struct eisa_device * ) bus_dev;
- uint8_t present;
-
- /* Copy slot number to struct eisa, set default values */
- eisa->slot = eisa_loc->slot;
- eisa->name = "?";
-
- /* Slot 0 is never valid */
- if ( ! eisa->slot )
- return 0;
-
- /* Set ioaddr */
- eisa->ioaddr = EISA_SLOT_BASE ( eisa->slot );
-
- /* Test for board present */
- outb ( 0xff, eisa->ioaddr + EISA_MFG_ID_HI );
- present = inb ( eisa->ioaddr + EISA_MFG_ID_HI );
- if ( present & 0x80 ) {
- /* No board present */
- return 0;
- }
-
- /* Read mfg and product IDs. Yes, the resulting uint16_ts
- * will be upside-down. This appears to be by design.
- */
- eisa->mfg_id = ( inb ( eisa->ioaddr + EISA_MFG_ID_LO ) << 8 )
- + present;
- eisa->prod_id = ( inb ( eisa->ioaddr + EISA_PROD_ID_LO ) << 8 )
- + inb ( eisa->ioaddr + EISA_PROD_ID_HI );
-
- DBG ( "EISA found slot %hhx (base %#hx) ID %hx:%hx (\"%s\")\n",
- eisa->slot, eisa->ioaddr, eisa->mfg_id, eisa->prod_id,
- isa_id_string ( eisa->mfg_id, eisa->prod_id ) );
-
- return 1;
- }
-
- /*
- * Test whether or not a driver is capable of driving the device.
- *
- */
- static int eisa_check_driver ( struct bus_dev *bus_dev,
- struct device_driver *device_driver ) {
- struct eisa_device *eisa = ( struct eisa_device * ) bus_dev;
- struct eisa_driver *driver
- = ( struct eisa_driver * ) device_driver->bus_driver_info;
- unsigned int i;
-
- /* Compare against driver's ID list */
- for ( i = 0 ; i < driver->id_count ; i++ ) {
- struct eisa_id *id = &driver->ids[i];
-
- if ( ( eisa->mfg_id == id->mfg_id ) &&
- ( ISA_PROD_ID ( eisa->prod_id ) ==
- ISA_PROD_ID ( id->prod_id ) ) ) {
- DBG ( "EISA found ID %hx:%hx (\"%s\") "
- "(device %s) matching driver %s\n",
- eisa->mfg_id, eisa->prod_id,
- isa_id_string ( eisa->mfg_id,
- eisa->prod_id ),
- id->name, driver->name );
- eisa->name = id->name;
- return 1;
- }
- }
-
- /* No device found */
- return 0;
- }
-
- /*
- * Describe an EISA device
- *
- */
- static char * eisa_describe_device ( struct bus_dev *bus_dev ) {
- struct eisa_device *eisa = ( struct eisa_device * ) bus_dev;
- static char eisa_description[] = "EISA 00";
-
- sprintf ( eisa_description + 5, "%hhx", eisa->slot );
- return eisa_description;
- }
-
- /*
- * Name an EISA device
- *
- */
- static const char * eisa_name_device ( struct bus_dev *bus_dev ) {
- struct eisa_device *eisa = ( struct eisa_device * ) bus_dev;
-
- return eisa->name;
- }
-
- /*
- * EISA bus operations table
- *
- */
- struct bus_driver eisa_driver __bus_driver = {
- .name = "EISA",
- .next_location = eisa_next_location,
- .fill_device = eisa_fill_device,
- .check_driver = eisa_check_driver,
- .describe_device = eisa_describe_device,
- .name_device = eisa_name_device,
- };
-
- /*
- * Fill in a nic structure
- *
- */
- void eisa_fill_nic ( struct nic *nic, struct eisa_device *eisa ) {
-
- /* Fill in ioaddr and irqno */
- nic->ioaddr = eisa->ioaddr;
- nic->irqno = 0;
-
- /* Fill in DHCP device ID structure */
- nic->dhcp_dev_id.bus_type = ISA_BUS_TYPE;
- nic->dhcp_dev_id.vendor_id = htons ( eisa->mfg_id );
- nic->dhcp_dev_id.device_id = htons ( eisa->prod_id );
- }
-
- /*
- * Reset and enable/disable an EISA device
- *
- */
- void eisa_device_enabled ( struct eisa_device *eisa, int enabled ) {
- /* Set reset line high for 1000 µs. Spec says 500 µs, but
- * this doesn't work for all cards, so we are conservative.
- */
- outb ( EISA_CMD_RESET, eisa->ioaddr + EISA_GLOBAL_CONFIG );
- udelay ( 1000 ); /* Must wait 800 */
-
- /* Set reset low and write a 1 to ENABLE. Delay again, in
- * case the card takes a while to wake up.
- */
- outb ( enabled ? EISA_CMD_ENABLE : 0,
- eisa->ioaddr + EISA_GLOBAL_CONFIG );
- udelay ( 1000 ); /* Must wait 800 */
-
- DBG ( "EISA %s device %hhx\n", ( enabled ? "enabled" : "disabled" ),
- eisa->slot );
- }
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