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https://github.com/ipxe/ipxe
synced 2025-12-26 17:42:47 +03:00
Updated ISAPnP, EISA, MCA and ISA buses to current device model.
ISA 3c509 is currently non-functional, although the EISA (3c509-eisa) and MCA (3c529) variants should build OK. None of this code is yet tested.
This commit is contained in:
Michael Brown
@@ -1,164 +1,24 @@
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#include "string.h"
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#include "io.h"
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#include "timer.h"
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#include "console.h"
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#include "dev.h"
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#include "eisa.h"
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#include <stdint.h>
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#include <string.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <errno.h>
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#include <io.h>
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#include <timer.h>
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#include <gpxe/eisa.h>
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/*
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* Increment a bus_loc structure to the next possible EISA 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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*
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*/
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static int eisa_next_location ( struct bus_loc *bus_loc ) {
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struct eisa_loc *eisa_loc = ( struct eisa_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 isa_loc and a struct
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* isa_dev, as mandated by bus.h.
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*
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*/
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BUS_LOC_CHECK ( struct eisa_loc );
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BUS_DEV_CHECK ( struct eisa_device );
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static struct eisa_driver eisa_drivers[0]
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__table_start ( struct eisa_driver, eisa_drivers );
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static struct eisa_driver eisa_drivers_end[0]
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__table_end ( struct eisa_driver, eisa_drivers );
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return ( eisa_loc->slot = ( ++eisa_loc->slot & EISA_MAX_SLOT ) );
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}
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static void eisabus_remove ( struct root_device *rootdev );
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/*
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* Fill in parameters for an EISA device based on slot number
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*
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* Return 1 if device present, 0 otherwise
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*
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*/
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static int eisa_fill_device ( struct bus_dev *bus_dev,
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struct bus_loc *bus_loc ) {
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struct eisa_loc *eisa_loc = ( struct eisa_loc * ) bus_loc;
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struct eisa_device *eisa = ( struct eisa_device * ) bus_dev;
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uint8_t present;
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/* Copy slot number to struct eisa, set default values */
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eisa->slot = eisa_loc->slot;
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eisa->name = "?";
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/* Slot 0 is never valid */
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if ( ! eisa->slot )
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return 0;
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/* Set ioaddr */
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eisa->ioaddr = EISA_SLOT_BASE ( eisa->slot );
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/* Test for board present */
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outb ( 0xff, eisa->ioaddr + EISA_MFG_ID_HI );
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present = inb ( eisa->ioaddr + EISA_MFG_ID_HI );
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if ( present & 0x80 ) {
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/* No board present */
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return 0;
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}
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/* Read mfg and product IDs. Yes, the resulting uint16_ts
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* will be upside-down. This appears to be by design.
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*/
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eisa->mfg_id = ( inb ( eisa->ioaddr + EISA_MFG_ID_LO ) << 8 )
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+ present;
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eisa->prod_id = ( inb ( eisa->ioaddr + EISA_PROD_ID_LO ) << 8 )
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+ inb ( eisa->ioaddr + EISA_PROD_ID_HI );
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DBG ( "EISA found slot %hhx (base %#hx) ID %hx:%hx (\"%s\")\n",
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eisa->slot, eisa->ioaddr, eisa->mfg_id, eisa->prod_id,
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isa_id_string ( eisa->mfg_id, eisa->prod_id ) );
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return 1;
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}
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/*
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* Test whether or not a driver is capable of driving the device.
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*
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*/
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static int eisa_check_driver ( struct bus_dev *bus_dev,
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struct device_driver *device_driver ) {
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struct eisa_device *eisa = ( struct eisa_device * ) bus_dev;
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struct eisa_driver *driver
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= ( struct eisa_driver * ) device_driver->bus_driver_info;
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unsigned int i;
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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 eisa_id *id = &driver->ids[i];
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if ( ( eisa->mfg_id == id->mfg_id ) &&
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( ISA_PROD_ID ( eisa->prod_id ) ==
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ISA_PROD_ID ( id->prod_id ) ) ) {
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DBG ( "EISA found ID %hx:%hx (\"%s\") "
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"(device %s) matching driver %s\n",
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eisa->mfg_id, eisa->prod_id,
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isa_id_string ( eisa->mfg_id,
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eisa->prod_id ),
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id->name, driver->name );
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eisa->name = id->name;
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return 1;
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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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/*
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* Describe an EISA device
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*
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*/
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static char * eisa_describe_device ( struct bus_dev *bus_dev ) {
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struct eisa_device *eisa = ( struct eisa_device * ) bus_dev;
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static char eisa_description[] = "EISA 00";
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sprintf ( eisa_description + 5, "%hhx", eisa->slot );
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return eisa_description;
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}
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/*
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* Name an EISA device
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*
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*/
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static const char * eisa_name_device ( struct bus_dev *bus_dev ) {
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struct eisa_device *eisa = ( struct eisa_device * ) bus_dev;
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return eisa->name;
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}
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/*
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* EISA bus operations table
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*
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*/
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struct bus_driver eisa_driver __bus_driver = {
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.name = "EISA",
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.next_location = eisa_next_location,
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.fill_device = eisa_fill_device,
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.check_driver = eisa_check_driver,
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.describe_device = eisa_describe_device,
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.name_device = eisa_name_device,
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};
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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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void eisa_fill_nic ( struct nic *nic, struct eisa_device *eisa ) {
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/* Fill in ioaddr and irqno */
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nic->ioaddr = eisa->ioaddr;
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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 = ISA_BUS_TYPE;
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nic->dhcp_dev_id.vendor_id = htons ( eisa->mfg_id );
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nic->dhcp_dev_id.device_id = htons ( eisa->prod_id );
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}
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/*
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/**
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* Reset and enable/disable an EISA device
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*
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* @v eisa EISA device
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* @v enabled 1=enable, 0=disable
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*/
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void eisa_device_enabled ( struct eisa_device *eisa, int enabled ) {
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/* Set reset line high for 1000 <20>s. Spec says 500 <20>s, but
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@@ -174,6 +34,152 @@ void eisa_device_enabled ( struct eisa_device *eisa, int enabled ) {
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eisa->ioaddr + EISA_GLOBAL_CONFIG );
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udelay ( 1000 ); /* Must wait 800 */
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DBG ( "EISA %s device %hhx\n", ( enabled ? "enabled" : "disabled" ),
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DBG ( "EISA %s device %02x\n", ( enabled ? "enabled" : "disabled" ),
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eisa->slot );
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}
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/**
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* Probe an EISA device
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*
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* @v eisa EISA device
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* @ret rc Return status code
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*
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* Searches for a driver for the EISA device. If a driver is found,
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* its probe() routine is called.
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*/
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static int eisa_probe ( struct eisa_device *eisa ) {
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struct eisa_driver *driver;
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struct eisa_device_id *id;
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unsigned int i;
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int rc;
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DBG ( "Adding EISA device %02x (%04x:%04x (\"%s\") io %x)\n",
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eisa->slot, eisa->vendor_id, eisa->prod_id,
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isa_id_string ( eisa->vendor_id, eisa->prod_id ), eisa->ioaddr );
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for ( driver = eisa_drivers; driver < eisa_drivers_end; driver++ ) {
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for ( i = 0 ; i < driver->id_count ; i++ ) {
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id = &driver->ids[i];
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if ( id->vendor_id != eisa->vendor_id )
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continue;
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if ( ISA_PROD_ID ( id->prod_id ) !=
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ISA_PROD_ID ( eisa->prod_id ) )
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continue;
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eisa->driver = driver;
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eisa->driver_name = id->name;
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DBG ( "...using driver %s\n", eisa->driver_name );
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if ( ( rc = driver->probe ( eisa, id ) ) != 0 ) {
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DBG ( "......probe failed\n" );
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continue;
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}
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return 0;
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}
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}
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DBG ( "...no driver found\n" );
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return -ENOTTY;
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}
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/**
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* Remove an EISA device
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*
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* @v eisa EISA device
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*/
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static void eisa_remove ( struct eisa_device *eisa ) {
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eisa->driver->remove ( eisa );
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DBG ( "Removed EISA device %02x\n", eisa->slot );
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}
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/**
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* Probe EISA root bus
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*
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* @v rootdev EISA bus root device
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*
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* Scans the EISA bus for devices and registers all devices it can
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* find.
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*/
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static int eisabus_probe ( struct root_device *rootdev ) {
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struct eisa_device *eisa = NULL;
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unsigned int slot;
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int rc;
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for ( slot = EISA_MIN_SLOT ; slot <= EISA_MAX_SLOT ; slot++ ) {
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/* Allocate struct eisa_device */
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if ( ! eisa )
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eisa = malloc ( sizeof ( *eisa ) );
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if ( ! eisa ) {
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rc = -ENOMEM;
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goto err;
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}
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memset ( eisa, 0, sizeof ( *eisa ) );
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eisa->slot = slot;
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eisa->ioaddr = EISA_SLOT_BASE ( eisa->slot );
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/* Test for board present */
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outb ( 0xff, eisa->ioaddr + EISA_VENDOR_ID );
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eisa->vendor_id =
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le16_to_cpu ( inw ( eisa->ioaddr + EISA_VENDOR_ID ) );
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eisa->prod_id =
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le16_to_cpu ( inw ( eisa->ioaddr + EISA_PROD_ID ) );
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if ( eisa->vendor_id & 0x80 ) {
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/* No board present */
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continue;
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}
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/* Add to device hierarchy */
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snprintf ( eisa->dev.name, sizeof ( eisa->dev.name ),
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"EISA%02x", slot );
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eisa->dev.desc.bus_type = BUS_TYPE_EISA;
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eisa->dev.desc.vendor = eisa->vendor_id;
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eisa->dev.desc.device = eisa->prod_id;
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eisa->dev.parent = &rootdev->dev;
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list_add ( &eisa->dev.siblings, &rootdev->dev.children );
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INIT_LIST_HEAD ( &eisa->dev.children );
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/* Look for a driver */
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if ( eisa_probe ( eisa ) == 0 ) {
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/* eisadev registered, we can drop our ref */
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eisa = NULL;
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} else {
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/* Not registered; re-use struct */
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list_del ( &eisa->dev.siblings );
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}
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}
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free ( eisa );
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return 0;
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err:
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free ( eisa );
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eisabus_remove ( rootdev );
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return rc;
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}
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/**
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* Remove EISA root bus
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*
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* @v rootdev EISA bus root device
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*/
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static void eisabus_remove ( struct root_device *rootdev ) {
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struct eisa_device *eisa;
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struct eisa_device *tmp;
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list_for_each_entry_safe ( eisa, tmp, &rootdev->dev.children,
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dev.siblings ) {
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eisa_remove ( eisa );
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list_del ( &eisa->dev.siblings );
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free ( eisa );
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}
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}
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/** EISA bus root device driver */
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static struct root_driver eisa_root_driver = {
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.probe = eisabus_probe,
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.remove = eisabus_remove,
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};
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/** EISA bus root device */
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struct root_device eisa_root_device __root_device = {
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.dev = { .name = "EISA" },
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.driver = &eisa_root_driver,
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};
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