diff options
author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/eisa/virtual_root.c |
Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'drivers/eisa/virtual_root.c')
-rw-r--r-- | drivers/eisa/virtual_root.c | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/drivers/eisa/virtual_root.c b/drivers/eisa/virtual_root.c new file mode 100644 index 000000000000..15677f20bd85 --- /dev/null +++ b/drivers/eisa/virtual_root.c @@ -0,0 +1,75 @@ +/* + * 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/config.h> +#include <linux/kernel.h> +#include <linux/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 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); |