swh:1:snp:173f8deb0c56c557784b4fd217e7608ac6197844
Tip revision: 485802a6c524e62b5924849dd727ddbb1497cc71 authored by Linus Torvalds on 17 June 2012, 00:25:17 UTC
Linux 3.5-rc3
Linux 3.5-rc3
Tip revision: 485802a
proc.c
/* 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/types.h>
#include <linux/kernel.h>
#include <linux/nubus.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/init.h>
#include <linux/module.h>
#include <asm/uaccess.h>
#include <asm/byteorder.h>
static int
nubus_devices_proc_show(struct seq_file *m, void *v)
{
struct nubus_dev *dev = nubus_devices;
while (dev) {
seq_printf(m, "%x\t%04x %04x %04x %04x",
dev->board->slot,
dev->category,
dev->type,
dev->dr_sw,
dev->dr_hw);
seq_printf(m, "\t%08lx\n", dev->board->slot_addr);
dev = dev->next;
}
return 0;
}
static int nubus_devices_proc_open(struct inode *inode, struct file *file)
{
return single_open(file, nubus_devices_proc_show, NULL);
}
static const struct file_operations nubus_devices_proc_fops = {
.owner = THIS_MODULE,
.open = nubus_devices_proc_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
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 = proc_mkdir(name, 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 = proc_mkdir(name, 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;
}
EXPORT_SYMBOL(nubus_proc_attach_device);
/* FIXME: this is certainly broken! */
int nubus_proc_detach_device(struct nubus_dev *dev)
{
struct proc_dir_entry *e;
if ((e = dev->procdir)) {
if (atomic_read(&e->count))
return -EBUSY;
remove_proc_entry(e->name, proc_bus_nubus_dir);
dev->procdir = NULL;
}
return 0;
}
EXPORT_SYMBOL(nubus_proc_detach_device);
void __init proc_bus_nubus_add_devices(void)
{
struct nubus_dev *dev;
for(dev = nubus_devices; dev; dev = dev->next)
nubus_proc_attach_device(dev);
}
void __init nubus_proc_init(void)
{
if (!MACH_IS_MAC)
return;
proc_bus_nubus_dir = proc_mkdir("bus/nubus", NULL);
proc_create("devices", 0, proc_bus_nubus_dir, &nubus_devices_proc_fops);
proc_bus_nubus_add_devices();
}