Initial import

1 files changed, 233 insertions, 0 deletions

diff --git a/drivers/nubus/proc.c b/drivers/nubus/proc.c
new file mode 100644
index 000000000..5371b374f
--- /dev/null
+++ b/drivers/nubus/proc.c
@@ -0,0 +1,233 @@
+/* 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 = {
+	.open		= nubus_devices_proc_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= single_release,
+};
+
+static struct proc_dir_entry *proc_bus_nubus_dir;
+
+static const struct file_operations nubus_proc_subdir_fops = {
+#warning Need to set some I/O handlers here
+};
+
+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 = proc_create(name, S_IFREG | S_IRUGO | S_IWUSR, parent,
+				&nubus_proc_subdir_fops);
+		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);
+
+/*
+ * /proc/nubus stuff
+ */
+static int nubus_proc_show(struct seq_file *m, void *v)
+{
+	const struct nubus_board *board = v;
+
+	/* Display header on line 1 */
+	if (v == SEQ_START_TOKEN)
+		seq_puts(m, "Nubus devices found:\n");
+	else
+		seq_printf(m, "Slot %X: %s\n", board->slot, board->name);
+	return 0;
+}
+
+static void *nubus_proc_start(struct seq_file *m, loff_t *_pos)
+{
+	struct nubus_board *board;
+	unsigned pos;
+
+	if (*_pos > LONG_MAX)
+		return NULL;
+	pos = *_pos;
+	if (pos == 0)
+		return SEQ_START_TOKEN;
+	for (board = nubus_boards; board; board = board->next)
+		if (--pos == 0)
+			break;
+	return board;
+}
+
+static void *nubus_proc_next(struct seq_file *p, void *v, loff_t *_pos)
+{
+	/* Walk the list of NuBus boards */
+	struct nubus_board *board = v;
+
+	++*_pos;
+	if (v == SEQ_START_TOKEN)
+		board = nubus_boards;
+	else if (board)
+		board = board->next;
+	return board;
+}
+
+static void nubus_proc_stop(struct seq_file *p, void *v)
+{
+}
+
+static const struct seq_operations nubus_proc_seqops = {
+	.start	= nubus_proc_start,
+	.next	= nubus_proc_next,
+	.stop	= nubus_proc_stop,
+	.show	= nubus_proc_show,
+};
+
+static int nubus_proc_open(struct inode *inode, struct file *file)
+{
+	return seq_open(file, &nubus_proc_seqops);
+}
+
+static const struct file_operations nubus_proc_fops = {
+	.open		= nubus_proc_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= seq_release,
+};
+
+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)
+{
+	proc_create("nubus", 0, NULL, &nubus_proc_fops);
+	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();
+}