diff --git a/include/pcmcia/ds.h b/include/pcmcia/ds.h
new file mode 100644
index 0000000..312fd95
--- /dev/null
+++ b/include/pcmcia/ds.h
@@ -0,0 +1,200 @@
+/*
+ * ds.h -- 16-bit PCMCIA core support
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * The initial developer of the original code is David A. Hinds
+ * <dahinds@users.sourceforge.net>.  Portions created by David A. Hinds
+ * are Copyright (C) 1999 David A. Hinds.  All Rights Reserved.
+ *
+ * (C) 1999		David A. Hinds
+ * (C) 2003 - 2004	Dominik Brodowski
+ */
+
+#ifndef _LINUX_DS_H
+#define _LINUX_DS_H
+
+#include <pcmcia/bulkmem.h>
+#include <pcmcia/cs_types.h>
+
+typedef struct tuple_parse_t {
+    tuple_t		tuple;
+    cisdata_t		data[255];
+    cisparse_t		parse;
+} tuple_parse_t;
+
+typedef struct win_info_t {
+    window_handle_t	handle;
+    win_req_t		window;
+    memreq_t		map;
+} win_info_t;
+    
+typedef struct bind_info_t {
+    dev_info_t		dev_info;
+    u_char		function;
+    struct dev_link_t	*instance;
+    char		name[DEV_NAME_LEN];
+    u_short		major, minor;
+    void		*next;
+} bind_info_t;
+
+typedef struct mtd_info_t {
+    dev_info_t		dev_info;
+    u_int		Attributes;
+    u_int		CardOffset;
+} mtd_info_t;
+
+typedef union ds_ioctl_arg_t {
+    servinfo_t		servinfo;
+    adjust_t		adjust;
+    config_info_t	config;
+    tuple_t		tuple;
+    tuple_parse_t	tuple_parse;
+    client_req_t	client_req;
+    cs_status_t		status;
+    conf_reg_t		conf_reg;
+    cisinfo_t		cisinfo;
+    region_info_t	region;
+    bind_info_t		bind_info;
+    mtd_info_t		mtd_info;
+    win_info_t		win_info;
+    cisdump_t		cisdump;
+} ds_ioctl_arg_t;
+
+#define DS_GET_CARD_SERVICES_INFO	_IOR ('d', 1, servinfo_t)
+#define DS_ADJUST_RESOURCE_INFO		_IOWR('d', 2, adjust_t)
+#define DS_GET_CONFIGURATION_INFO	_IOWR('d', 3, config_info_t)
+#define DS_GET_FIRST_TUPLE		_IOWR('d', 4, tuple_t)
+#define DS_GET_NEXT_TUPLE		_IOWR('d', 5, tuple_t)
+#define DS_GET_TUPLE_DATA		_IOWR('d', 6, tuple_parse_t)
+#define DS_PARSE_TUPLE			_IOWR('d', 7, tuple_parse_t)
+#define DS_RESET_CARD			_IO  ('d', 8)
+#define DS_GET_STATUS			_IOWR('d', 9, cs_status_t)
+#define DS_ACCESS_CONFIGURATION_REGISTER _IOWR('d', 10, conf_reg_t)
+#define DS_VALIDATE_CIS			_IOR ('d', 11, cisinfo_t)
+#define DS_SUSPEND_CARD			_IO  ('d', 12)
+#define DS_RESUME_CARD			_IO  ('d', 13)
+#define DS_EJECT_CARD			_IO  ('d', 14)
+#define DS_INSERT_CARD			_IO  ('d', 15)
+#define DS_GET_FIRST_REGION		_IOWR('d', 16, region_info_t)
+#define DS_GET_NEXT_REGION		_IOWR('d', 17, region_info_t)
+#define DS_REPLACE_CIS			_IOWR('d', 18, cisdump_t)
+#define DS_GET_FIRST_WINDOW		_IOR ('d', 19, win_info_t)
+#define DS_GET_NEXT_WINDOW		_IOWR('d', 20, win_info_t)
+#define DS_GET_MEM_PAGE			_IOWR('d', 21, win_info_t)
+
+#define DS_BIND_REQUEST			_IOWR('d', 60, bind_info_t)
+#define DS_GET_DEVICE_INFO		_IOWR('d', 61, bind_info_t) 
+#define DS_GET_NEXT_DEVICE		_IOWR('d', 62, bind_info_t) 
+#define DS_UNBIND_REQUEST		_IOW ('d', 63, bind_info_t)
+#define DS_BIND_MTD			_IOWR('d', 64, mtd_info_t)
+
+#ifdef __KERNEL__
+#include <linux/device.h>
+
+typedef struct dev_node_t {
+    char		dev_name[DEV_NAME_LEN];
+    u_short		major, minor;
+    struct dev_node_t	*next;
+} dev_node_t;
+
+typedef struct dev_link_t {
+    dev_node_t		*dev;
+    u_int		state, open;
+    wait_queue_head_t	pending;
+    client_handle_t	handle;
+    io_req_t		io;
+    irq_req_t		irq;
+    config_req_t	conf;
+    window_handle_t	win;
+    void		*priv;
+    struct dev_link_t	*next;
+} dev_link_t;
+
+/* Flags for device state */
+#define DEV_PRESENT		0x01
+#define DEV_CONFIG		0x02
+#define DEV_STALE_CONFIG	0x04	/* release on close */
+#define DEV_STALE_LINK		0x08	/* detach on release */
+#define DEV_CONFIG_PENDING	0x10
+#define DEV_RELEASE_PENDING	0x20
+#define DEV_SUSPEND		0x40
+#define DEV_BUSY		0x80
+
+#define DEV_OK(l) \
+    ((l) && ((l->state & ~DEV_BUSY) == (DEV_CONFIG|DEV_PRESENT)))
+
+
+struct pcmcia_socket;
+
+extern struct bus_type pcmcia_bus_type;
+
+struct pcmcia_driver {
+	dev_link_t		*(*attach)(void);
+	void			(*detach)(dev_link_t *);
+	struct module		*owner;
+	struct device_driver	drv;
+};
+
+/* driver registration */
+int pcmcia_register_driver(struct pcmcia_driver *driver);
+void pcmcia_unregister_driver(struct pcmcia_driver *driver);
+
+struct pcmcia_device {
+	/* the socket and the device_no [for multifunction devices]
+	   uniquely define a pcmcia_device */
+	struct pcmcia_socket	*socket;
+
+	u8			device_no;
+
+	/* the hardware "function" device; certain subdevices can
+	 * share one hardware "function" device. */
+	u8			func;
+
+	struct list_head	socket_device_list;
+
+	/* deprecated, a cleaned up version will be moved into this
+	   struct soon */
+	dev_link_t		*instance;
+	struct client_t {
+		u_short			client_magic;
+		struct pcmcia_socket	*Socket;
+		u_char			Function;
+		u_int			state;
+		event_t			EventMask;
+		int (*event_handler)	(event_t event, int priority,
+					 event_callback_args_t *);
+		event_callback_args_t 	event_callback_args;
+	}			client;
+
+	/* information about this device */
+	u8			has_manf_id:1;
+	u8			has_card_id:1;
+	u8			has_func_id:1;
+	u8			reserved:5;
+
+	u8			func_id;
+	u16			manf_id;
+	u16			card_id;
+
+	char *			prod_id[4];
+
+	/* device driver wanted by cardmgr */
+	struct pcmcia_driver *	cardmgr;
+
+	struct device		dev;
+};
+
+#define to_pcmcia_dev(n) container_of(n, struct pcmcia_device, dev)
+#define to_pcmcia_drv(n) container_of(n, struct pcmcia_driver, drv)
+
+#define handle_to_pdev(handle) container_of(handle, struct pcmcia_device, client);
+#define handle_to_dev(handle) ((container_of(handle, struct pcmcia_device, client))->dev)
+
+/* error reporting */
+void cs_error(client_handle_t handle, int func, int ret);
+
+#endif /* __KERNEL__ */
+#endif /* _LINUX_DS_H */