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- #include "etherboot.h"
- #include "io.h"
- #include "timer.h"
- #include "eisa.h"
-
- /*
- * Ensure that there is sufficient space in the shared dev_bus
- * structure for a struct pci_device.
- *
- */
- DEV_BUS( struct eisa_device, eisa_dev );
- static char eisa_magic[0]; /* guaranteed unique symbol */
-
- /*
- * Fill in parameters for an EISA device based on slot number
- *
- * Return 1 if device present, 0 otherwise
- *
- */
- static int fill_eisa_device ( struct eisa_device *eisa ) {
- uint8_t present;
-
- /* 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 slot %d (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;
- }
-
- /*
- * Find an EISA device matching the specified driver
- *
- */
- int find_eisa_device ( struct eisa_device *eisa, struct eisa_driver *driver ) {
- unsigned int i;
-
- /* Initialise struct eisa if it's the first time it's been used. */
- if ( eisa->magic != eisa_magic ) {
- memset ( eisa, 0, sizeof ( *eisa ) );
- eisa->magic = eisa_magic;
- eisa->slot = EISA_MIN_SLOT;
- }
-
- /* Iterate through all possible EISA slots, starting where we
- * left off.
- */
- for ( ; eisa->slot <= EISA_MAX_SLOT ; eisa->slot++ ) {
- /* If we've already used this device, skip it */
- if ( eisa->already_tried ) {
- eisa->already_tried = 0;
- continue;
- }
-
- /* Fill in device parameters */
- if ( ! fill_eisa_device ( eisa ) ) {
- continue;
- }
-
- /* 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 ( "Device %s (driver %s) matches ID %s\n",
- id->name, driver->name,
- isa_id_string ( eisa->mfg_id,
- eisa->prod_id ) );
- eisa->name = id->name;
- eisa->already_tried = 1;
- return 1;
- }
- }
- }
-
- /* No device found */
- eisa->slot = EISA_MIN_SLOT;
- return 0;
- }
-
- /*
- * Find the next EISA device that can be used to boot using the
- * specified driver.
- *
- */
- int find_eisa_boot_device ( struct dev *dev, struct eisa_driver *driver ) {
- struct eisa_device *eisa = ( struct eisa_device * )dev->bus;
-
- if ( ! find_eisa_device ( eisa, driver ) )
- return 0;
-
- dev->name = eisa->name;
- dev->devid.bus_type = ISA_BUS_TYPE;
- dev->devid.vendor_id = eisa->mfg_id;
- dev->devid.device_id = eisa->prod_id;
-
- return 1;
- }
-
- /*
- * Reset and enable an EISA device
- *
- */
- void enable_eisa_device ( struct eisa_device *eisa ) {
- /* 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 ( EISA_CMD_ENABLE, eisa->ioaddr + EISA_GLOBAL_CONFIG );
- udelay ( 1000 ); /* Must wait 800 */
- }
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