/* * 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);