From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001
From: Linus Torvalds <torvalds@ppc970.osdl.org>
Date: Sat, 16 Apr 2005 15:20:36 -0700
Subject: Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!
---
 drivers/mtd/chips/map_rom.c | 94 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 94 insertions(+)
 create mode 100644 drivers/mtd/chips/map_rom.c

(limited to 'drivers/mtd/chips/map_rom.c')

diff --git a/drivers/mtd/chips/map_rom.c b/drivers/mtd/chips/map_rom.c
new file mode 100644
index 00000000000..624c12c232c
--- /dev/null
+++ b/drivers/mtd/chips/map_rom.c
@@ -0,0 +1,94 @@
+/*
+ * Common code to handle map devices which are simple ROM
+ * (C) 2000 Red Hat. GPL'd.
+ * $Id: map_rom.c,v 1.23 2005/01/05 18:05:12 dwmw2 Exp $
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <asm/io.h>
+#include <asm/byteorder.h>
+#include <linux/errno.h>
+#include <linux/slab.h>
+#include <linux/init.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/map.h>
+#include <linux/mtd/compatmac.h>
+
+static int maprom_read (struct mtd_info *, loff_t, size_t, size_t *, u_char *);
+static int maprom_write (struct mtd_info *, loff_t, size_t, size_t *, const u_char *);
+static void maprom_nop (struct mtd_info *);
+static struct mtd_info *map_rom_probe(struct map_info *map);
+
+static struct mtd_chip_driver maprom_chipdrv = {
+	.probe	= map_rom_probe,
+	.name	= "map_rom",
+	.module	= THIS_MODULE
+};
+
+static struct mtd_info *map_rom_probe(struct map_info *map)
+{
+	struct mtd_info *mtd;
+
+	mtd = kmalloc(sizeof(*mtd), GFP_KERNEL);
+	if (!mtd)
+		return NULL;
+
+	memset(mtd, 0, sizeof(*mtd));
+
+	map->fldrv = &maprom_chipdrv;
+	mtd->priv = map;
+	mtd->name = map->name;
+	mtd->type = MTD_ROM;
+	mtd->size = map->size;
+	mtd->read = maprom_read;
+	mtd->write = maprom_write;
+	mtd->sync = maprom_nop;
+	mtd->flags = MTD_CAP_ROM;
+	mtd->erasesize = 131072;
+ 	while(mtd->size & (mtd->erasesize - 1))
+		mtd->erasesize >>= 1;
+
+	__module_get(THIS_MODULE);
+	return mtd;
+}
+
+
+static int maprom_read (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf)
+{
+	struct map_info *map = mtd->priv;
+
+	map_copy_from(map, buf, from, len);
+	*retlen = len;
+	return 0;
+}
+
+static void maprom_nop(struct mtd_info *mtd)
+{
+	/* Nothing to see here */
+}
+
+static int maprom_write (struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, const u_char *buf)
+{
+	printk(KERN_NOTICE "maprom_write called\n");
+	return -EIO;
+}
+
+static int __init map_rom_init(void)
+{
+	register_mtd_chip_driver(&maprom_chipdrv);
+	return 0;
+}
+
+static void __exit map_rom_exit(void)
+{
+	unregister_mtd_chip_driver(&maprom_chipdrv);
+}
+
+module_init(map_rom_init);
+module_exit(map_rom_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
+MODULE_DESCRIPTION("MTD chip driver for ROM chips");
-- 
cgit v1.2.3