2005-04-13 04:59:13 +02:00
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/*
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* MCA bus driver code
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*
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* Abstracted from 3c509.c.
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*
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*/
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2005-04-17 12:51:05 +02:00
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#include "string.h"
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2005-04-13 04:59:13 +02:00
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#include "io.h"
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2005-04-22 04:28:16 +02:00
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#include "console.h"
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2006-06-05 17:41:22 +02:00
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#include "dev.h"
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2005-04-13 04:59:13 +02:00
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#include "mca.h"
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2005-04-14 12:10:54 +02:00
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/*
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2005-04-22 04:28:16 +02:00
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* Increment a bus_loc structure to the next possible MCA location.
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* Leave the structure zeroed and return 0 if there are no more valid
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* locations.
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2005-04-14 12:10:54 +02:00
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*
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*/
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2005-04-22 04:28:16 +02:00
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static int mca_next_location ( struct bus_loc *bus_loc ) {
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struct mca_loc *mca_loc = ( struct mca_loc * ) bus_loc;
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/*
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* Ensure that there is sufficient space in the shared bus
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* structures for a struct mca_loc and a struct
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* mca_dev, as mandated by bus.h.
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*
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*/
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BUS_LOC_CHECK ( struct mca_loc );
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BUS_DEV_CHECK ( struct mca_device );
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2005-04-22 17:33:35 +02:00
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return ( mca_loc->slot = ( ++mca_loc->slot & MCA_MAX_SLOT_NR ) );
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2005-04-22 04:28:16 +02:00
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}
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2005-04-14 12:10:54 +02:00
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2005-04-13 04:59:13 +02:00
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/*
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* Fill in parameters for an MCA device based on slot number
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*
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*/
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2005-04-22 04:28:16 +02:00
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static int mca_fill_device ( struct bus_dev *bus_dev,
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struct bus_loc *bus_loc ) {
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struct mca_loc *mca_loc = ( struct mca_loc * ) bus_loc;
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struct mca_device *mca = ( struct mca_device * ) bus_dev;
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2005-04-16 12:19:13 +02:00
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unsigned int i, seen_non_ff;
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2005-04-13 04:59:13 +02:00
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2005-04-22 04:28:16 +02:00
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/* Store slot in struct mca, set default values */
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mca->slot = mca_loc->slot;
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mca->name = "?";
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2005-04-13 04:59:13 +02:00
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/* Make sure motherboard setup is off */
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outb_p ( 0xff, MCA_MOTHERBOARD_SETUP_REG );
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/* Select the slot */
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outb_p ( 0x8 | ( mca->slot & 0xf ), MCA_ADAPTER_SETUP_REG );
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/* Read the POS registers */
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2005-04-16 12:19:13 +02:00
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seen_non_ff = 0;
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2005-04-13 04:59:13 +02:00
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for ( i = 0 ; i < ( sizeof ( mca->pos ) / sizeof ( mca->pos[0] ) ) ;
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i++ ) {
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mca->pos[i] = inb_p ( MCA_POS_REG ( i ) );
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2005-04-16 12:19:13 +02:00
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if ( mca->pos[i] != 0xff )
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seen_non_ff = 1;
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2005-04-13 04:59:13 +02:00
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}
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2005-04-16 12:19:13 +02:00
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/* If all POS registers are 0xff, this means there's no device
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* present
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*/
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if ( ! seen_non_ff )
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return 0;
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2005-04-13 04:59:13 +02:00
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/* Kill all setup modes */
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outb_p ( 0, MCA_ADAPTER_SETUP_REG );
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2005-04-15 01:32:36 +02:00
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DBG ( "MCA found slot %d id %hx "
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"(POS %hhx:%hhx:%hhx:%hhx:%hhx:%hhx:%hhx:%hhx)\n",
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2005-04-13 04:59:13 +02:00
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mca->slot, MCA_ID ( mca ),
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mca->pos[0], mca->pos[1], mca->pos[2], mca->pos[3],
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mca->pos[4], mca->pos[5], mca->pos[6], mca->pos[7] );
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return 1;
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}
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/*
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2005-04-22 04:28:16 +02:00
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* Test whether or not a driver is capable of driving the device.
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2005-04-13 04:59:13 +02:00
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*
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*/
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2005-04-22 04:28:16 +02:00
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static int mca_check_driver ( struct bus_dev *bus_dev,
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struct device_driver *device_driver ) {
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struct mca_device *mca = ( struct mca_device * ) bus_dev;
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struct mca_driver *driver
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= ( struct mca_driver * ) device_driver->bus_driver_info;
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2005-04-14 15:44:07 +02:00
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unsigned int i;
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2005-04-13 04:59:13 +02:00
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2005-04-22 04:28:16 +02:00
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/* Compare against driver's ID list */
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for ( i = 0 ; i < driver->id_count ; i++ ) {
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struct mca_id *id = &driver->ids[i];
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if ( MCA_ID ( mca ) == id->id ) {
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DBG ( "MCA found ID %hx (device %s) "
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"matching driver %s\n",
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2005-04-22 17:56:57 +02:00
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id->name, id->id, device_driver->name );
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2005-04-22 04:28:16 +02:00
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mca->name = id->name;
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return 1;
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2005-04-13 04:59:13 +02:00
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}
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}
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/* No device found */
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return 0;
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}
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2005-04-14 15:44:07 +02:00
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/*
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2005-04-22 04:28:16 +02:00
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* Describe an MCA device
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2005-04-14 15:44:07 +02:00
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*
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*/
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2005-04-25 20:54:15 +02:00
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static char * mca_describe_device ( struct bus_dev *bus_dev ) {
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2005-04-22 04:28:16 +02:00
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struct mca_device *mca = ( struct mca_device * ) bus_dev;
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static char mca_description[] = "MCA 00";
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2005-04-14 15:44:07 +02:00
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2005-04-22 04:28:16 +02:00
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sprintf ( mca_description + 4, "%hhx", mca->slot );
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return mca_description;
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}
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/*
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* Name an MCA device
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*
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*/
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2005-04-25 20:54:15 +02:00
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static const char * mca_name_device ( struct bus_dev *bus_dev ) {
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2005-04-22 04:28:16 +02:00
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struct mca_device *mca = ( struct mca_device * ) bus_dev;
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return mca->name;
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}
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2005-04-14 15:44:07 +02:00
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2005-04-22 04:28:16 +02:00
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/*
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* MCA bus operations table
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*
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*/
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struct bus_driver mca_driver __bus_driver = {
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2005-04-25 20:54:15 +02:00
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.name = "MCA",
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.next_location = mca_next_location,
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.fill_device = mca_fill_device,
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.check_driver = mca_check_driver,
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.describe_device = mca_describe_device,
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.name_device = mca_name_device,
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2005-04-22 04:28:16 +02:00
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};
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2005-04-14 15:44:07 +02:00
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2005-04-22 04:28:16 +02:00
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/*
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* Fill in a nic structure
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*
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*/
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2005-04-22 13:56:27 +02:00
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void mca_fill_nic ( struct nic *nic, struct mca_device *mca ) {
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2005-04-22 04:28:16 +02:00
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/* ioaddr and irqno must be read in a device-dependent way
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* from the POS registers
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*/
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nic->ioaddr = 0;
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nic->irqno = 0;
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/* Fill in DHCP device ID structure */
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nic->dhcp_dev_id.bus_type = MCA_BUS_TYPE;
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nic->dhcp_dev_id.vendor_id = htons ( GENERIC_MCA_VENDOR );
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nic->dhcp_dev_id.device_id = htons ( MCA_ID ( mca ) );
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2005-04-14 15:44:07 +02:00
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}
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