patch-2.2.18 linux/drivers/nubus/proc.c

• Lines: 184
• Date: Fri Oct 13 23:40:43 2000
• Orig file: v2.2.17/drivers/nubus/proc.c
• Orig date: Thu Jan 1 01:00:00 1970

diff -u --new-file --recursive --exclude-from /usr/src/exclude v2.2.17/drivers/nubus/proc.c linux/drivers/nubus/proc.c
@@ -0,0 +1,183 @@
+/* drivers/nubus/proc.c: Proc FS interface for NuBus.
+
+   By David Huggins-Daines <dhd@debian.org>
+
+   Much code and many ideas from drivers/pci/proc.c:
+   Copyright (c) 1997, 1998 Martin Mares <mj@atrey.karlin.mff.cuni.cz>
+
+   This is initially based on the Zorro and PCI interfaces.  However,
+   it works somewhat differently.  The intent is to provide a
+   structure in /proc analogous to the structure of the NuBus ROM
+   resources.
+
+   Therefore each NuBus device is in fact a directory, which may in
+   turn contain subdirectories.  The "files" correspond to NuBus
+   resource records.  For those types of records which we know how to
+   convert to formats that are meaningful to userspace (mostly just
+   icons) these files will provide "cooked" data.  Otherwise they will
+   simply provide raw access (read-only of course) to the ROM.  */
+
+#include <linux/config.h>
+#include <linux/ptrace.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/nubus.h>
+#include <linux/proc_fs.h>
+#include <linux/init.h>
+#include <asm/uaccess.h>
+#include <asm/byteorder.h>
+
+int
+get_nubus_dev_info(char *buf, char **start, off_t pos, int count, int wr)
+{
+	struct nubus_dev *dev = nubus_devices;
+	off_t at = 0;
+	int len, cnt;
+
+	cnt = 0;
+	while (dev && count > cnt) {
+		len = sprintf(buf, "%x\t%04x %04x %04x %04x",
+			      dev->board->slot,
+			      dev->category,
+			      dev->type,
+			      dev->dr_sw,
+			      dev->dr_hw);
+		len += sprintf(buf+len,
+			       "\t%08lx",
+			       dev->board->slot_addr);
+		buf[len++] = '\n';
+		at += len;
+		if (at >= pos) {
+			if (!*start) {
+				*start = buf + (pos - (at - len));
+				cnt = at - pos;
+			} else
+				cnt += len;
+			buf += len;
+		}
+		dev = dev->next;
+	}
+	return (count > cnt) ? cnt : count;
+}
+
+static struct proc_dir_entry proc_nubus_devices = {
+	PROC_BUS_NUBUS_DEVICES, 7, "devices",
+	S_IFREG | S_IRUGO, 1, 0, 0,
+	0, &proc_array_inode_operations,
+	get_nubus_dev_info
+};
+
+static struct proc_dir_entry *proc_bus_nubus_dir;
+
+static void nubus_proc_subdir(struct nubus_dev* dev,
+			      struct proc_dir_entry* parent,
+			      struct nubus_dir* dir)
+{
+	struct nubus_dirent ent;
+
+	/* Some of these are directories, others aren't */
+	while (nubus_readdir(dir, &ent) != -1) {
+		char name[8];
+		struct proc_dir_entry* e;
+		
+		sprintf(name, "%x", ent.type);
+		e = create_proc_entry(name, S_IFREG | S_IRUGO |
+				      S_IWUSR, parent);
+		if (!e) return;
+	}
+}
+
+/* Can't do this recursively since the root directory is structured
+   somewhat differently from the subdirectories */
+static void nubus_proc_populate(struct nubus_dev* dev,
+				struct proc_dir_entry* parent,
+				struct nubus_dir* root)
+{
+	struct nubus_dirent ent;
+
+	/* We know these are all directories (board resource + one or
+	   more functional resources) */
+	while (nubus_readdir(root, &ent) != -1) {
+		char name[8];
+		struct proc_dir_entry* e;
+		struct nubus_dir dir;
+		
+		sprintf(name, "%x", ent.type);
+		e = create_proc_entry(name, S_IFDIR, parent);
+		if (!e) return;
+
+		/* And descend */
+		if (nubus_get_subdir(&ent, &dir) == -1) {
+			/* This shouldn't happen */
+			printk(KERN_ERR "NuBus root directory node %x:%x has no subdir!\n",
+			       dev->board->slot, ent.type);
+			continue;
+		} else {
+			nubus_proc_subdir(dev, e, &dir);
+		}
+	}
+}
+
+int nubus_proc_attach_device(struct nubus_dev *dev)
+{
+	struct proc_dir_entry *e;
+	struct nubus_dir root;
+	char name[8];
+
+	if (dev == NULL) {
+		printk(KERN_ERR
+		       "NULL pointer in nubus_proc_attach_device, shoot the programmer!\n");
+		return -1;
+	}
+		
+	if (dev->board == NULL) {
+		printk(KERN_ERR
+		       "NULL pointer in nubus_proc_attach_device, shoot the programmer!\n");
+		printk("dev = %p, dev->board = %p\n", dev, dev->board);
+		return -1;
+	}
+		
+	/* Create a directory */
+	sprintf(name, "%x", dev->board->slot);
+	e = dev->procdir = create_proc_entry(name, S_IFDIR,
+					     proc_bus_nubus_dir);
+	if (!e)
+		return -ENOMEM;
+
+	/* Now recursively populate it with files */
+	nubus_get_root_dir(dev->board, &root);
+	nubus_proc_populate(dev, e, &root);
+
+	return 0;
+}
+
+/* FIXME: this is certainly broken! */
+int nubus_proc_detach_device(struct nubus_dev *dev)
+{
+	struct proc_dir_entry *e;
+
+	if ((e = dev->procdir)) {
+		if (e->count)
+			return -EBUSY;
+		remove_proc_entry(e->name, proc_bus_nubus_dir);
+		dev->procdir = NULL;
+	}
+	return 0;
+}
+
+__initfunc(void proc_bus_nubus_add_devices(void))
+{
+	struct nubus_dev *dev;
+	
+	for(dev = nubus_devices; dev; dev = dev->next)
+		nubus_proc_attach_device(dev);
+}
+
+__initfunc(void nubus_proc_init(void))
+{
+	if (!MACH_IS_MAC)
+		return;
+	proc_bus_nubus_dir = create_proc_entry("nubus", S_IFDIR, proc_bus);
+	proc_register(proc_bus_nubus_dir, &proc_nubus_devices);
+	proc_bus_nubus_add_devices();
+}