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![Alexey Dobriyan](/assets/img/avatar_default.png)
Signed-off-by: Alexey Dobriyan <adobriyan@sw.ru> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
176 lines
4.5 KiB
C
176 lines
4.5 KiB
C
/* drivers/nubus/proc.c: Proc FS interface for NuBus.
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By David Huggins-Daines <dhd@debian.org>
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Much code and many ideas from drivers/pci/proc.c:
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Copyright (c) 1997, 1998 Martin Mares <mj@atrey.karlin.mff.cuni.cz>
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This is initially based on the Zorro and PCI interfaces. However,
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it works somewhat differently. The intent is to provide a
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structure in /proc analogous to the structure of the NuBus ROM
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resources.
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Therefore each NuBus device is in fact a directory, which may in
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turn contain subdirectories. The "files" correspond to NuBus
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resource records. For those types of records which we know how to
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convert to formats that are meaningful to userspace (mostly just
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icons) these files will provide "cooked" data. Otherwise they will
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simply provide raw access (read-only of course) to the ROM. */
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#include <linux/types.h>
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#include <linux/kernel.h>
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#include <linux/nubus.h>
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#include <linux/proc_fs.h>
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#include <linux/seq_file.h>
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#include <linux/init.h>
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#include <linux/module.h>
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#include <asm/uaccess.h>
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#include <asm/byteorder.h>
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static int
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nubus_devices_proc_show(struct seq_file *m, void *v)
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{
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struct nubus_dev *dev = nubus_devices;
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while (dev) {
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seq_printf(m, "%x\t%04x %04x %04x %04x",
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dev->board->slot,
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dev->category,
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dev->type,
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dev->dr_sw,
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dev->dr_hw);
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seq_printf(m, "\t%08lx\n", dev->board->slot_addr);
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dev = dev->next;
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}
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return 0;
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}
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static int nubus_devices_proc_open(struct inode *inode, struct file *file)
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{
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return single_open(file, nubus_devices_proc_show, NULL);
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}
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static const struct file_operations nubus_devices_proc_fops = {
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.owner = THIS_MODULE,
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.open = nubus_devices_proc_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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};
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static struct proc_dir_entry *proc_bus_nubus_dir;
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static void nubus_proc_subdir(struct nubus_dev* dev,
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struct proc_dir_entry* parent,
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struct nubus_dir* dir)
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{
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struct nubus_dirent ent;
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/* Some of these are directories, others aren't */
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while (nubus_readdir(dir, &ent) != -1) {
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char name[8];
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struct proc_dir_entry* e;
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sprintf(name, "%x", ent.type);
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e = create_proc_entry(name, S_IFREG | S_IRUGO |
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S_IWUSR, parent);
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if (!e) return;
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}
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}
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/* Can't do this recursively since the root directory is structured
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somewhat differently from the subdirectories */
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static void nubus_proc_populate(struct nubus_dev* dev,
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struct proc_dir_entry* parent,
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struct nubus_dir* root)
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{
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struct nubus_dirent ent;
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/* We know these are all directories (board resource + one or
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more functional resources) */
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while (nubus_readdir(root, &ent) != -1) {
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char name[8];
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struct proc_dir_entry* e;
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struct nubus_dir dir;
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sprintf(name, "%x", ent.type);
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e = proc_mkdir(name, parent);
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if (!e) return;
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/* And descend */
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if (nubus_get_subdir(&ent, &dir) == -1) {
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/* This shouldn't happen */
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printk(KERN_ERR "NuBus root directory node %x:%x has no subdir!\n",
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dev->board->slot, ent.type);
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continue;
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} else {
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nubus_proc_subdir(dev, e, &dir);
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}
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}
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}
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int nubus_proc_attach_device(struct nubus_dev *dev)
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{
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struct proc_dir_entry *e;
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struct nubus_dir root;
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char name[8];
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if (dev == NULL) {
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printk(KERN_ERR
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"NULL pointer in nubus_proc_attach_device, shoot the programmer!\n");
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return -1;
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}
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if (dev->board == NULL) {
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printk(KERN_ERR
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"NULL pointer in nubus_proc_attach_device, shoot the programmer!\n");
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printk("dev = %p, dev->board = %p\n", dev, dev->board);
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return -1;
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}
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/* Create a directory */
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sprintf(name, "%x", dev->board->slot);
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e = dev->procdir = proc_mkdir(name, proc_bus_nubus_dir);
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if (!e)
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return -ENOMEM;
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/* Now recursively populate it with files */
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nubus_get_root_dir(dev->board, &root);
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nubus_proc_populate(dev, e, &root);
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return 0;
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}
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EXPORT_SYMBOL(nubus_proc_attach_device);
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/* FIXME: this is certainly broken! */
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int nubus_proc_detach_device(struct nubus_dev *dev)
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{
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struct proc_dir_entry *e;
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if ((e = dev->procdir)) {
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if (atomic_read(&e->count))
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return -EBUSY;
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remove_proc_entry(e->name, proc_bus_nubus_dir);
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dev->procdir = NULL;
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}
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return 0;
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}
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EXPORT_SYMBOL(nubus_proc_detach_device);
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void __init proc_bus_nubus_add_devices(void)
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{
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struct nubus_dev *dev;
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for(dev = nubus_devices; dev; dev = dev->next)
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nubus_proc_attach_device(dev);
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}
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void __init nubus_proc_init(void)
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{
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if (!MACH_IS_MAC)
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return;
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proc_bus_nubus_dir = proc_mkdir("bus/nubus", NULL);
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proc_create("devices", 0, proc_bus_nubus_dir, &nubus_devices_proc_fops);
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proc_bus_nubus_add_devices();
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}
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