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");