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-rw-r--r--drivers/nubus/proc.c174
1 files changed, 174 insertions, 0 deletions
diff --git a/drivers/nubus/proc.c b/drivers/nubus/proc.c
new file mode 100644
index 000000000000..5271a4a7af26
--- /dev/null
+++ b/drivers/nubus/proc.c
@@ -0,0 +1,174 @@
+/* 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/init.h>
+#include <asm/uaccess.h>
+#include <asm/byteorder.h>
+
+static int
+get_nubus_dev_info(char *buf, char **start, off_t pos, int count)
+{
+ 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_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;
+}
+
+/* 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;
+}
+
+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("nubus", proc_bus);
+ create_proc_info_entry("devices", 0, proc_bus_nubus_dir,
+ get_nubus_dev_info);
+ proc_bus_nubus_add_devices();
+}

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