Bare uClinux-2.4.20-uc1 CVS pull

1 files changed, 94 insertions, 0 deletions

diff --git a/uClinux-2.4.20-uc1/include/linux/mtd/map.h b/uClinux-2.4.20-uc1/include/linux/mtd/map.h
new file mode 100644
index 0000000..94ffed2
--- /dev/null
+++ b/uClinux-2.4.20-uc1/include/linux/mtd/map.h
@@ -0,0 +1,94 @@
+
+/* Overhauled routines for dealing with different mmap regions of flash */
+/* $Id: map.h,v 1.25 2001/09/09 15:04:17 dwmw2 Exp $ */
+
+#ifndef __LINUX_MTD_MAP_H__
+#define __LINUX_MTD_MAP_H__
+
+#include <linux/config.h>
+#include <linux/types.h>
+#include <linux/mtd/mtd.h>
+#include <linux/slab.h>
+
+/* The map stuff is very simple. You fill in your struct map_info with
+   a handful of routines for accessing the device, making sure they handle
+   paging etc. correctly if your device needs it. Then you pass it off
+   to a chip driver which deals with a mapped device - generally either
+   do_cfi_probe() or do_ram_probe(), either of which will return a 
+   struct mtd_info if they liked what they saw. At which point, you
+   fill in the mtd->module with your own module address, and register 
+   it.
+   
+   The mtd->priv field will point to the struct map_info, and any further
+   private data required by the chip driver is linked from the 
+   mtd->priv->fldrv_priv field. This allows the map driver to get at 
+   the destructor function map->fldrv_destroy() when it's tired
+   of living.
+*/
+
+struct map_info {
+	char *name;
+	unsigned long size;
+	int buswidth; /* in octets */
+	__u8 (*read8)(struct map_info *, unsigned long);
+	__u16 (*read16)(struct map_info *, unsigned long);
+	__u32 (*read32)(struct map_info *, unsigned long);  
+	/* If it returned a 'long' I'd call it readl.
+	 * It doesn't.
+	 * I won't.
+	 * dwmw2 */
+	
+	void (*copy_from)(struct map_info *, void *, unsigned long, ssize_t);
+	void (*write8)(struct map_info *, __u8, unsigned long);
+	void (*write16)(struct map_info *, __u16, unsigned long);
+	void (*write32)(struct map_info *, __u32, unsigned long);
+	void (*copy_to)(struct map_info *, unsigned long, const void *, ssize_t);
+
+	void (*set_vpp)(struct map_info *, int);
+	/* We put these two here rather than a single void *map_priv, 
+	   because we want mappers to be able to have quickly-accessible
+	   cache for the 'currently-mapped page' without the _extra_
+	   redirection that would be necessary. If you need more than
+	   two longs, turn the second into a pointer. dwmw2 */
+	unsigned long map_priv_1;
+	unsigned long map_priv_2;
+	void *fldrv_priv;
+	struct mtd_chip_driver *fldrv;
+};
+
+
+struct mtd_chip_driver {
+	struct mtd_info *(*probe)(struct map_info *map);
+	void (*destroy)(struct mtd_info *);
+	struct module *module;
+	char *name;
+	struct list_head list;
+};
+
+void register_mtd_chip_driver(struct mtd_chip_driver *);
+void unregister_mtd_chip_driver(struct mtd_chip_driver *);
+
+struct mtd_info *do_map_probe(char *name, struct map_info *map);
+
+
+/*
+ * Destroy an MTD device which was created for a map device.
+ * Make sure the MTD device is already unregistered before calling this
+ */
+static inline void map_destroy(struct mtd_info *mtd)
+{
+	struct map_info *map = mtd->priv;
+
+	if (map->fldrv->destroy)
+		map->fldrv->destroy(mtd);
+#ifdef CONFIG_MODULES
+	if (map->fldrv->module)
+		__MOD_DEC_USE_COUNT(map->fldrv->module);
+#endif
+	kfree(mtd);
+}
+
+#define ENABLE_VPP(map) do { if(map->set_vpp) map->set_vpp(map, 1); } while(0)
+#define DISABLE_VPP(map) do { if(map->set_vpp) map->set_vpp(map, 0); } while(0)
+
+#endif /* __LINUX_MTD_MAP_H__ */