Logo Search packages:      
Sourcecode: linux version File versions  Download package

virtual_root.c

/*
 * Virtual EISA root driver.
 * Acts as a placeholder if we don't have a proper EISA bridge.
 *
 * (C) 2003 Marc Zyngier <maz@wild-wind.fr.eu.org>
 *
 * This code is released under the GPL version 2.
 */

#include <linux/kernel.h>
#include <linux/platform_device.h>
#include <linux/eisa.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>

#if defined(CONFIG_ALPHA_JENSEN) || defined(CONFIG_EISA_VLB_PRIMING)
#define EISA_FORCE_PROBE_DEFAULT 1
#else
#define EISA_FORCE_PROBE_DEFAULT 0
#endif

static int force_probe = EISA_FORCE_PROBE_DEFAULT;
static void virtual_eisa_release (struct device *);

/* The default EISA device parent (virtual root device).
 * Now use a platform device, since that's the obvious choice. */

static struct platform_device eisa_root_dev = {
      .name = "eisa",
      .id   = 0,
      .dev  = {
            .release = virtual_eisa_release,
      },
};

static struct eisa_root_device eisa_bus_root = {
      .dev           = &eisa_root_dev.dev,
      .bus_base_addr = 0,
      .res         = &ioport_resource,
      .slots             = EISA_MAX_SLOTS,
      .dma_mask      = 0xffffffff,
};

static void virtual_eisa_release (struct device *dev)
{
      /* nothing really to do here */
}

static int __init virtual_eisa_root_init (void)
{
      int r;
      
        if ((r = platform_device_register (&eisa_root_dev))) {
                return r;
        }

      eisa_bus_root.force_probe = force_probe;
      
      eisa_root_dev.dev.driver_data = &eisa_bus_root;

      if (eisa_root_register (&eisa_bus_root)) {
            /* A real bridge may have been registered before
             * us. So quietly unregister. */
            platform_device_unregister (&eisa_root_dev);
            return -1;
      }

      return 0;
}

module_param (force_probe, int, 0444);

device_initcall (virtual_eisa_root_init);

Generated by  Doxygen 1.6.0   Back to index