mca.c File Reference

#include <stdint.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
#include <ipxe/io.h>
#include <ipxe/mca.h>

Go to the source code of this file.

Functions
	FILE_LICENCE (BSD2)
static void	mcabus_remove (struct root_device *rootdev)
	Remove MCA root bus. More...
static int	mca_probe (struct mca_device *mca)
	Probe an MCA device. More...
static void	mca_remove (struct mca_device *mca)
	Remove an MCA device. More...
static int	mcabus_probe (struct root_device *rootdev)
	Probe MCA root bus. More...

Variables
static struct root_driver	mca_root_driver
	MCA bus root device driver. More...
struct root_device mca_root_device	__root_device
	MCA bus root device. More...

Function Documentation

FILE_LICENCE()

FILE_LICENCE

(

BSD2

)

mcabus_remove()

static void mcabus_remove ( struct root_device *  rootdev )

static

Remove MCA root bus.

Parameters

rootdev

MCA bus root device

Definition at line 155 of file mca.c.

                                                          {
        struct mca_device *mca;
        struct mca_device *tmp;

        list_for_each_entry_safe ( mca, tmp, &rootdev->dev.children,
                                   dev.siblings ) {
                mca_remove ( mca );
                list_del ( &mca->dev.siblings );
                free ( mca );
        }
}

References device::children, mca_device::dev, root_device::dev, free, list_del, list_for_each_entry_safe, mca_remove(), device::siblings, and tmp.

Referenced by mcabus_probe().

mca_probe()

static int mca_probe ( struct mca_device *  mca )

static

Probe an MCA device.

Parameters

mca	MCA device

Return values

rc	Return status code

Searches for a driver for the MCA device. If a driver is found, its probe() routine is called.

Definition at line 29 of file mca.c.

                                                {
        struct mca_driver *driver;
        struct mca_device_id *id;
        unsigned int i;
        int rc;

        DBG ( "Adding MCA slot %02x (ID %04x POS "
              "%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x)\n",
              mca->slot, MCA_ID ( mca ),
              mca->pos[0], mca->pos[1], mca->pos[2], mca->pos[3],
              mca->pos[4], mca->pos[5], mca->pos[6], mca->pos[7] );

        for_each_table_entry ( driver, MCA_DRIVERS ) {
                for ( i = 0 ; i < driver->id_count ; i++ ) {
                        id = &driver->ids[i];
                        if ( id->id != MCA_ID ( mca ) )
                                continue;
                        mca->driver = driver;
                        mca->dev.driver_name = id->name;
                        DBG ( "...using driver %s\n", mca->dev.driver_name );
                        if ( ( rc = driver->probe ( mca, id ) ) != 0 ) {
                                DBG ( "......probe failed\n" );
                                continue;
                        }
                        return 0;
                }
        }

        DBG ( "...no driver found\n" );
        return -ENOTTY;
}

References DBG, mca_device::dev, mca_device::driver, device::driver_name, ENOTTY, for_each_table_entry, id, mca_driver::id_count, mca_driver::ids, MCA_DRIVERS, MCA_ID, mca_device::pos, mca_driver::probe, rc, and mca_device::slot.

Referenced by mcabus_probe().

mca_remove()

static void mca_remove ( struct mca_device *  mca )

static

Remove an MCA device.

Parameters

mca	MCA device

Definition at line 66 of file mca.c.

                                                  {
        mca->driver->remove ( mca );
        DBG ( "Removed MCA device %02x\n", mca->slot );
}

References DBG, mca_device::driver, mca_driver::remove, and mca_device::slot.

Referenced by mcabus_remove().

mcabus_probe()

static int mcabus_probe ( struct root_device *  rootdev )

static

Probe MCA root bus.

Parameters

rootdev

MCA bus root device

Scans the MCA bus for devices and registers all devices it can find.

Definition at line 79 of file mca.c.

                                                        {
        struct mca_device *mca = NULL;
        unsigned int slot;
        int seen_non_ff;
        unsigned int i;
        int rc;

        for ( slot = 0 ; slot <= MCA_MAX_SLOT_NR ; slot++ ) {
                /* Allocate struct mca_device */
                if ( ! mca )
                        mca = malloc ( sizeof ( *mca ) );
                if ( ! mca ) {
                        rc = -ENOMEM;
                        goto err;
                }
                memset ( mca, 0, sizeof ( *mca ) );
                mca->slot = slot;

                /* Make sure motherboard setup is off */
                outb_p ( 0xff, MCA_MOTHERBOARD_SETUP_REG );

                /* Select the slot */
                outb_p ( 0x8 | ( mca->slot & 0xf ), MCA_ADAPTER_SETUP_REG );

                /* Read the POS registers */
                seen_non_ff = 0;
                for ( i = 0 ; i < ( sizeof ( mca->pos ) /
                                    sizeof ( mca->pos[0] ) ) ; i++ ) {
                        mca->pos[i] = inb_p ( MCA_POS_REG ( i ) );
                        if ( mca->pos[i] != 0xff )
                                seen_non_ff = 1;
                }
        
                /* Kill all setup modes */
                outb_p ( 0, MCA_ADAPTER_SETUP_REG );

                /* If all POS registers are 0xff, this means there's no device
                 * present
                 */
                if ( ! seen_non_ff )
                        continue;

                /* Add to device hierarchy */
                snprintf ( mca->dev.name, sizeof ( mca->dev.name ),
                           "MCA%02x", slot );
                mca->dev.desc.bus_type = BUS_TYPE_MCA;
                mca->dev.desc.vendor = GENERIC_MCA_VENDOR;
                mca->dev.desc.device = MCA_ID ( mca );
                mca->dev.parent = &rootdev->dev;
                list_add ( &mca->dev.siblings, &rootdev->dev.children );
                INIT_LIST_HEAD ( &mca->dev.children );

                /* Look for a driver */
                if ( mca_probe ( mca ) == 0 ) {
                        /* mcadev registered, we can drop our ref */
                        mca = NULL;
                } else {
                        /* Not registered; re-use struct */
                        list_del ( &mca->dev.siblings );
                }
        }

        free ( mca );
        return 0;

 err:
        free ( mca );
        mcabus_remove ( rootdev );
        return rc;
}

References device_description::bus_type, BUS_TYPE_MCA, device::children, device::desc, mca_device::dev, root_device::dev, device_description::device, ENOMEM, free, GENERIC_MCA_VENDOR, inb_p, INIT_LIST_HEAD, list_add, list_del, malloc(), MCA_ADAPTER_SETUP_REG, MCA_ID, MCA_MAX_SLOT_NR, MCA_MOTHERBOARD_SETUP_REG, MCA_POS_REG, mca_probe(), mcabus_remove(), memset(), device::name, NULL, outb_p, device::parent, mca_device::pos, rc, device::siblings, slot, mca_device::slot, snprintf(), and device_description::vendor.

Variable Documentation

mca_root_driver

struct root_driver mca_root_driver

static

Initial value:

= {
        .probe = mcabus_probe,
        .remove = mcabus_remove,
}

MCA bus root device driver.

Definition at line 168 of file mca.c.

__root_device

struct root_device mca_root_device __root_device

Initial value:

= {
        .dev = { .name = "MCA" },
        .driver = &mca_root_driver,
}

MCA bus root device.

Definition at line 174 of file mca.c.