isa.c File Reference

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

Go to the source code of this file.

Macros
#define	ISA_EXTRA_PROBE_ADDR_COUNT    ( sizeof ( isa_extra_probe_addrs ) / sizeof ( isa_extra_probe_addrs[0] ) )
#define	ISA_IOIDX_MIN(driver)
#define	ISA_IOIDX_MAX(driver)
#define	ISA_IOADDR(driver, ioidx)

Functions
	FILE_LICENCE (GPL2_OR_LATER)
static void	isabus_remove (struct root_device *rootdev)
	Remove ISA root bus.
static int	isa_probe (struct isa_device *isa)
	Probe an ISA device.
static void	isa_remove (struct isa_device *isa)
	Remove an ISA device.
static int	isabus_probe (struct root_device *rootdev)
	Probe ISA root bus.

Variables
static isa_probe_addr_t	isa_extra_probe_addrs []
static struct root_driver	isa_root_driver
	ISA bus root device driver.
struct root_device isa_root_device	__root_device
	ISA bus root device.

Macro Definition Documentation

ISA_EXTRA_PROBE_ADDR_COUNT

#define ISA_EXTRA_PROBE_ADDR_COUNT    ( sizeof ( isa_extra_probe_addrs ) / sizeof ( isa_extra_probe_addrs[0] ) )

Definition at line 39 of file isa.c.

#define ISA_EXTRA_PROBE_ADDR_COUNT \
     ( sizeof ( isa_extra_probe_addrs ) / sizeof ( isa_extra_probe_addrs[0] ) )

ISA_IOIDX_MIN

#define ISA_IOIDX_MIN

(

driver

)

Value:

( -ISA_EXTRA_PROBE_ADDR_COUNT )

Definition at line 42 of file isa.c.

Referenced by isabus_probe().

ISA_IOIDX_MAX

#define ISA_IOIDX_MAX

(

driver

)

Value:

( -1 )

Definition at line 44 of file isa.c.

Referenced by isabus_probe().

ISA_IOADDR

#define ISA_IOADDR	(		driver,
			ioidx )

Value:

        ( ( (ioidx) >= 0 ) ?                                              \
          (driver)->probe_addrs[(ioidx)] :                                \
          *( isa_extra_probe_addrs + (ioidx) + ISA_EXTRA_PROBE_ADDR_COUNT ) )

Definition at line 49 of file isa.c.

#define ISA_IOADDR( driver, ioidx )                                       \
        ( ( (ioidx) >= 0 ) ?                                              \
          (driver)->probe_addrs[(ioidx)] :                                \
          *( isa_extra_probe_addrs + (ioidx) + ISA_EXTRA_PROBE_ADDR_COUNT ) )

Referenced by isabus_probe().

Function Documentation

FILE_LICENCE()

FILE_LICENCE

(

GPL2_OR_LATER

)

isabus_remove()

void isabus_remove ( struct root_device * rootdev )

static

Remove ISA root bus.

Parameters

rootdev

ISA bus root device

Definition at line 152 of file isa.c.

                                                          {
        struct isa_device *isa;
        struct isa_device *tmp;
 
        list_for_each_entry_safe ( isa, tmp, &rootdev->dev.children,
                                   dev.siblings ) {
                isa_remove ( isa );
                list_del ( &isa->dev.siblings );
                free ( isa );
        }
}

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

Referenced by isabus_probe().

isa_probe()

int isa_probe ( struct isa_device * isa )

static

Probe an ISA device.

Parameters

isa	ISA device

Return values

rc	Return status code

Definition at line 62 of file isa.c.

                                                {
        int rc;
 
        DBG ( "Trying ISA driver %s at I/O %04x\n",
              isa->driver->name, isa->ioaddr );
 
        if ( ( rc = isa->driver->probe ( isa ) ) != 0 ) {
                DBG ( "...probe failed\n" );
                return rc;
        }
 
        DBG ( "...device found\n" );
        return 0;
}

References DBG, isa_device::driver, isa_device::ioaddr, isa_driver::name, isa_driver::probe, and rc.

Referenced by isabus_probe().

isa_remove()

void isa_remove ( struct isa_device * isa )

static

Remove an ISA device.

Parameters

isa	ISA device

Definition at line 82 of file isa.c.

                                                  {
        isa->driver->remove ( isa );
        DBG ( "Removed ISA%04x\n", isa->ioaddr );
}

References DBG, isa_device::driver, isa_device::ioaddr, and isa_driver::remove.

Referenced by isabus_remove().

isabus_probe()

int isabus_probe ( struct root_device * rootdev )

static

Probe ISA root bus.

Parameters

rootdev

ISA bus root device

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

Definition at line 95 of file isa.c.

                                                        {
        struct isa_device *isa = NULL;
        struct isa_driver *driver;
        long ioidx;
        int rc;
 
        for_each_table_entry ( driver, ISA_DRIVERS ) {
                for ( ioidx = ISA_IOIDX_MIN ( driver ) ;
                      ioidx <= ISA_IOIDX_MAX ( driver ) ; ioidx++ ) {
                        /* Allocate struct isa_device */
                        if ( ! isa )
                                isa = malloc ( sizeof ( *isa ) );
                        if ( ! isa ) {
                                rc = -ENOMEM;
                                goto err;
                        }
                        memset ( isa, 0, sizeof ( *isa ) );
                        isa->driver = driver;
                        isa->ioaddr = ISA_IOADDR ( driver, ioidx );
 
                        /* Add to device hierarchy */
                        snprintf ( isa->dev.name, sizeof ( isa->dev.name ),
                                   "ISA%04x", isa->ioaddr );
                        isa->dev.driver_name = driver->name;
                        isa->dev.desc.bus_type = BUS_TYPE_ISA;
                        isa->dev.desc.vendor = driver->vendor_id;
                        isa->dev.desc.device = driver->prod_id;
                        isa->dev.parent = &rootdev->dev;
                        list_add ( &isa->dev.siblings,
                                   &rootdev->dev.children );
                        INIT_LIST_HEAD ( &isa->dev.children );
 
                        /* Try probing at this I/O address */
                        if ( isa_probe ( isa ) == 0 ) {
                                /* isadev registered, we can drop our ref */
                                isa = NULL;
                        } else {
                                /* Not registered; re-use struct */
                                list_del ( &isa->dev.siblings );
                        }
                }
        }
 
        free ( isa );
        return 0;
 
 err:
        free ( isa );
        isabus_remove ( rootdev );
        return rc;
}

References device_description::bus_type, BUS_TYPE_ISA, device::children, device::desc, isa_device::dev, root_device::dev, device_description::device, isa_device::driver, device::driver_name, ENOMEM, for_each_table_entry, free, INIT_LIST_HEAD, isa_device::ioaddr, ISA_DRIVERS, ISA_IOADDR, ISA_IOIDX_MAX, ISA_IOIDX_MIN, isa_probe(), isabus_remove(), list_add, list_del, malloc(), memset(), device::name, isa_driver::name, NULL, device::parent, isa_driver::prod_id, rc, device::siblings, snprintf(), device_description::vendor, and isa_driver::vendor_id.

Variable Documentation

isa_extra_probe_addrs

isa_probe_addr_t isa_extra_probe_addrs[]

static

Initial value:

= {
 
 
 
}

Definition at line 34 of file isa.c.

                                                  {
#ifdef ISA_PROBE_ADDRS
        ISA_PROBE_ADDRS
#endif
};

isa_root_driver

struct root_driver isa_root_driver

static

Initial value:

= {
        .probe = isabus_probe,
        .remove = isabus_remove,
}

ISA bus root device driver.

Definition at line 165 of file isa.c.

                                            {
        .probe = isabus_probe,
        .remove = isabus_remove,
};

__root_device

struct root_device isa_root_device __root_device

Initial value:

= {
        .dev = { .name = "ISA" },
        .driver = &isa_root_driver,
}

ISA bus root device.

Definition at line 171 of file isa.c.

                                                   {
        .dev = { .name = "ISA" },
        .driver = &isa_root_driver,
};