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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-17 00:20:36 +0200 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-17 00:20:36 +0200 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/misc/hdpuftrs/hdpu_nexus.c | |
download | linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.xz linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.zip |
Linux-2.6.12-rc2v2.6.12-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/misc/hdpuftrs/hdpu_nexus.c')
-rw-r--r-- | drivers/misc/hdpuftrs/hdpu_nexus.c | 111 |
1 files changed, 111 insertions, 0 deletions
diff --git a/drivers/misc/hdpuftrs/hdpu_nexus.c b/drivers/misc/hdpuftrs/hdpu_nexus.c new file mode 100644 index 000000000000..c203b27269ea --- /dev/null +++ b/drivers/misc/hdpuftrs/hdpu_nexus.c @@ -0,0 +1,111 @@ +/* + * Sky Nexus Register Driver + * + * Copyright (C) 2002 Brian Waite + * + * This driver allows reading the Nexus register + * It exports the /proc/sky_chassis_id and also + * /proc/sky_slot_id pseudo-file for status information. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + * + */ + +#include <linux/version.h> +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/proc_fs.h> +#include <linux/hdpu_features.h> +#include <linux/pci.h> + +#include <linux/device.h> + +static int hdpu_nexus_probe(struct device *ddev); +static int hdpu_nexus_remove(struct device *ddev); + +static struct proc_dir_entry *hdpu_slot_id; +static struct proc_dir_entry *hdpu_chassis_id; +static int slot_id = -1; +static int chassis_id = -1; + +static struct device_driver hdpu_nexus_driver = { + .name = HDPU_NEXUS_NAME, + .bus = &platform_bus_type, + .probe = hdpu_nexus_probe, + .remove = hdpu_nexus_remove, +}; + +int hdpu_slot_id_read(char *buffer, char **buffer_location, off_t offset, + int buffer_length, int *zero, void *ptr) +{ + + if (offset > 0) + return 0; + return sprintf(buffer, "%d\n", slot_id); +} + +int hdpu_chassis_id_read(char *buffer, char **buffer_location, off_t offset, + int buffer_length, int *zero, void *ptr) +{ + + if (offset > 0) + return 0; + return sprintf(buffer, "%d\n", chassis_id); +} + +static int hdpu_nexus_probe(struct device *ddev) +{ + struct platform_device *pdev = to_platform_device(ddev); + struct resource *res; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + int *nexus_id_addr; + nexus_id_addr = + ioremap(res->start, (unsigned long)(res->end - res->start)); + if (nexus_id_addr) { + slot_id = (*nexus_id_addr >> 8) & 0x1f; + chassis_id = *nexus_id_addr & 0xff; + iounmap(nexus_id_addr); + } else + printk("Could not map slot id\n"); + hdpu_slot_id = create_proc_entry("sky_slot_id", 0666, &proc_root); + hdpu_slot_id->read_proc = hdpu_slot_id_read; + hdpu_slot_id->nlink = 1; + + hdpu_chassis_id = create_proc_entry("sky_chassis_id", 0666, &proc_root); + hdpu_chassis_id->read_proc = hdpu_chassis_id_read; + hdpu_chassis_id->nlink = 1; + return 0; +} + +static int hdpu_nexus_remove(struct device *ddev) +{ + slot_id = -1; + chassis_id = -1; + remove_proc_entry("sky_slot_id", &proc_root); + remove_proc_entry("sky_chassis_id", &proc_root); + hdpu_slot_id = 0; + hdpu_chassis_id = 0; + return 0; +} + +static int __init nexus_init(void) +{ + int rc; + rc = driver_register(&hdpu_nexus_driver); + return rc; +} + +static void __exit nexus_exit(void) +{ + driver_unregister(&hdpu_nexus_driver); +} + +module_init(nexus_init); +module_exit(nexus_exit); + +MODULE_AUTHOR("Brian Waite"); +MODULE_LICENSE("GPL"); |