1 /* drivers/nubus/proc.c: Proc FS interface for NuBus.
3 By David Huggins-Daines <dhd@debian.org>
5 Much code and many ideas from drivers/pci/proc.c:
6 Copyright (c) 1997, 1998 Martin Mares <mj@atrey.karlin.mff.cuni.cz>
8 This is initially based on the Zorro and PCI interfaces. However,
9 it works somewhat differently. The intent is to provide a
10 structure in /proc analogous to the structure of the NuBus ROM
13 Therefore each NuBus device is in fact a directory, which may in
14 turn contain subdirectories. The "files" correspond to NuBus
15 resource records. For those types of records which we know how to
16 convert to formats that are meaningful to userspace (mostly just
17 icons) these files will provide "cooked" data. Otherwise they will
18 simply provide raw access (read-only of course) to the ROM. */
20 #include <linux/types.h>
21 #include <linux/kernel.h>
22 #include <linux/nubus.h>
23 #include <linux/proc_fs.h>
24 #include <linux/init.h>
25 #include <asm/uaccess.h>
26 #include <asm/byteorder.h>
29 get_nubus_dev_info(char *buf, char **start, off_t pos, int count)
31 struct nubus_dev *dev = nubus_devices;
36 while (dev && count > cnt) {
37 len = sprintf(buf, "%x\t%04x %04x %04x %04x",
43 len += sprintf(buf+len,
45 dev->board->slot_addr);
50 *start = buf + (pos - (at - len));
58 return (count > cnt) ? cnt : count;
61 static struct proc_dir_entry *proc_bus_nubus_dir;
63 static void nubus_proc_subdir(struct nubus_dev* dev,
64 struct proc_dir_entry* parent,
65 struct nubus_dir* dir)
67 struct nubus_dirent ent;
69 /* Some of these are directories, others aren't */
70 while (nubus_readdir(dir, &ent) != -1) {
72 struct proc_dir_entry* e;
74 sprintf(name, "%x", ent.type);
75 e = create_proc_entry(name, S_IFREG | S_IRUGO |
81 /* Can't do this recursively since the root directory is structured
82 somewhat differently from the subdirectories */
83 static void nubus_proc_populate(struct nubus_dev* dev,
84 struct proc_dir_entry* parent,
85 struct nubus_dir* root)
87 struct nubus_dirent ent;
89 /* We know these are all directories (board resource + one or
90 more functional resources) */
91 while (nubus_readdir(root, &ent) != -1) {
93 struct proc_dir_entry* e;
96 sprintf(name, "%x", ent.type);
97 e = proc_mkdir(name, parent);
101 if (nubus_get_subdir(&ent, &dir) == -1) {
102 /* This shouldn't happen */
103 printk(KERN_ERR "NuBus root directory node %x:%x has no subdir!\n",
104 dev->board->slot, ent.type);
107 nubus_proc_subdir(dev, e, &dir);
112 int nubus_proc_attach_device(struct nubus_dev *dev)
114 struct proc_dir_entry *e;
115 struct nubus_dir root;
120 "NULL pointer in nubus_proc_attach_device, shoot the programmer!\n");
124 if (dev->board == NULL) {
126 "NULL pointer in nubus_proc_attach_device, shoot the programmer!\n");
127 printk("dev = %p, dev->board = %p\n", dev, dev->board);
131 /* Create a directory */
132 sprintf(name, "%x", dev->board->slot);
133 e = dev->procdir = proc_mkdir(name, proc_bus_nubus_dir);
137 /* Now recursively populate it with files */
138 nubus_get_root_dir(dev->board, &root);
139 nubus_proc_populate(dev, e, &root);
144 /* FIXME: this is certainly broken! */
145 int nubus_proc_detach_device(struct nubus_dev *dev)
147 struct proc_dir_entry *e;
149 if ((e = dev->procdir)) {
150 if (atomic_read(&e->count))
152 remove_proc_entry(e->name, proc_bus_nubus_dir);
158 void __init proc_bus_nubus_add_devices(void)
160 struct nubus_dev *dev;
162 for(dev = nubus_devices; dev; dev = dev->next)
163 nubus_proc_attach_device(dev);
166 void __init nubus_proc_init(void)
170 proc_bus_nubus_dir = proc_mkdir("nubus", proc_bus);
171 create_proc_info_entry("devices", 0, proc_bus_nubus_dir,
173 proc_bus_nubus_add_devices();