staging: dgnc: add dgnc digi driver

This patch adds the DGNC driver. This is a TTY Serial Port
Driver for the Digi International Neo and Classic PCI based product
line by Digi International <http://www.digi.com>.

This driver isn't hooked up to the build system because it doesn't
build, it merely adds the driver written by Digi to the kernel tree so
that it can be cleaned up and fixed up properly over time.

Cc: Mark Hounschell <markh@compro.net>
Signed-off-by: Lidza Louina <lidza.louina@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 566 insertions, 0 deletions

diff --git a/drivers/staging/dgnc/dgnc_driver.h b/drivers/staging/dgnc/dgnc_driver.h
new file mode 100644
index 0000000..43177f4
--- /dev/null
+++ b/drivers/staging/dgnc/dgnc_driver.h
@@ -0,0 +1,566 @@
+/*
+ * Copyright 2003 Digi International (www.digi.com)
+ *      Scott H Kilau <Scott_Kilau at digi dot com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED; without even the
+ * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
+ * PURPOSE.  See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ *	NOTE: THIS IS A SHARED HEADER. DO NOT CHANGE CODING STYLE!!!
+ *
+ *************************************************************************
+ *
+ * Driver includes
+ *
+ *************************************************************************/
+
+#ifndef __DGNC_DRIVER_H
+#define __DGNC_DRIVER_H
+
+#include <linux/version.h>	/* To get the current Linux version */
+#include <linux/types.h>	/* To pick up the varions Linux types */
+#include <linux/tty.h>          /* To pick up the various tty structs/defines */
+#include <linux/interrupt.h>	/* For irqreturn_t type */
+
+#include "dgnc_types.h"		/* Additional types needed by the Digi header files */
+#include "digi.h"		/* Digi specific ioctl header */  
+#include "dgnc_kcompat.h"	/* Kernel 2.4/2.6 compat includes */
+#include "dgnc_sysfs.h"		/* Support for SYSFS */
+
+/*************************************************************************
+ *
+ * Driver defines
+ *
+ *************************************************************************/
+
+/*
+ * Driver identification, error and debugging statments
+ *
+ * In theory, you can change all occurances of "digi" in the next
+ * three lines, and the driver printk's will all automagically change.
+ *
+ * APR((fmt, args, ...));	Always prints message
+ * DPR((fmt, args, ...));	Only prints if DGNC_TRACER is defined at
+ *				  compile time and dgnc_debug!=0
+ */
+#define	PROCSTR		"dgnc"			/* /proc entries	 */
+#define	DEVSTR		"/dev/dg/dgnc"		/* /dev entries		 */
+#define	DRVSTR		"dgnc"			/* Driver name string 
+						 * displayed by APR	 */
+#define	APR(args)	do { PRINTF_TO_KMEM(args); printk(DRVSTR": "); printk args; \
+			   } while (0)
+#define	RAPR(args)	do { PRINTF_TO_KMEM(args); printk args; } while (0)
+
+#define TRC_TO_CONSOLE 1
+
+/*
+ * Debugging levels can be set using debug insmod variable
+ * They can also be compiled out completely.
+ */
+
+#define	DBG_INIT		(dgnc_debug & 0x01)
+#define	DBG_BASIC		(dgnc_debug & 0x02)
+#define	DBG_CORE		(dgnc_debug & 0x04)
+
+#define	DBG_OPEN		(dgnc_debug & 0x08)
+#define	DBG_CLOSE		(dgnc_debug & 0x10)
+#define	DBG_READ		(dgnc_debug & 0x20)
+#define	DBG_WRITE		(dgnc_debug & 0x40)
+
+#define	DBG_IOCTL		(dgnc_debug & 0x80)
+
+#define	DBG_PROC		(dgnc_debug & 0x100)
+#define	DBG_PARAM		(dgnc_debug & 0x200)
+#define	DBG_PSCAN		(dgnc_debug & 0x400)
+#define	DBG_EVENT		(dgnc_debug & 0x800)
+
+#define	DBG_DRAIN		(dgnc_debug & 0x1000)
+#define	DBG_MSIGS		(dgnc_debug & 0x2000)
+
+#define	DBG_MGMT		(dgnc_debug & 0x4000)
+#define	DBG_INTR		(dgnc_debug & 0x8000)
+
+#define	DBG_CARR		(dgnc_debug & 0x10000)
+
+
+#if defined(DGNC_TRACER)
+
+# if defined(TRC_TO_KMEM)
+/* Choose one: */
+#  define TRC_ON_OVERFLOW_WRAP_AROUND
+#  undef  TRC_ON_OVERFLOW_SHIFT_BUFFER
+# endif //TRC_TO_KMEM
+
+# define TRC_MAXMSG		1024
+# define TRC_OVERFLOW		"(OVERFLOW)"
+# define TRC_DTRC		"/usr/bin/dtrc"
+
+#if defined TRC_TO_CONSOLE
+#define PRINTF_TO_CONSOLE(args) { printk(DRVSTR": "); printk args; }
+#else //!defined TRACE_TO_CONSOLE
+#define PRINTF_TO_CONSOLE(args)
+#endif
+
+#if defined TRC_TO_KMEM
+#define PRINTF_TO_KMEM(args) dgnc_tracef args 
+#else //!defined TRC_TO_KMEM
+#define PRINTF_TO_KMEM(args)
+#endif
+
+#define	TRC(args)	{ PRINTF_TO_KMEM(args); PRINTF_TO_CONSOLE(args) }
+
+# define DPR_INIT(ARGS)		if (DBG_INIT) TRC(ARGS)
+# define DPR_BASIC(ARGS)	if (DBG_BASIC) TRC(ARGS)
+# define DPR_CORE(ARGS)		if (DBG_CORE) TRC(ARGS)
+# define DPR_OPEN(ARGS)		if (DBG_OPEN)  TRC(ARGS)
+# define DPR_CLOSE(ARGS)	if (DBG_CLOSE)  TRC(ARGS)
+# define DPR_READ(ARGS)		if (DBG_READ)  TRC(ARGS)
+# define DPR_WRITE(ARGS)	if (DBG_WRITE) TRC(ARGS)
+# define DPR_IOCTL(ARGS)	if (DBG_IOCTL) TRC(ARGS)
+# define DPR_PROC(ARGS)		if (DBG_PROC)  TRC(ARGS)
+# define DPR_PARAM(ARGS)	if (DBG_PARAM)  TRC(ARGS)
+# define DPR_PSCAN(ARGS)	if (DBG_PSCAN)  TRC(ARGS)
+# define DPR_EVENT(ARGS)	if (DBG_EVENT)  TRC(ARGS)
+# define DPR_DRAIN(ARGS)	if (DBG_DRAIN)  TRC(ARGS)
+# define DPR_CARR(ARGS)		if (DBG_CARR)  TRC(ARGS)
+# define DPR_MGMT(ARGS)		if (DBG_MGMT)  TRC(ARGS)
+# define DPR_INTR(ARGS)		if (DBG_INTR)  TRC(ARGS)
+# define DPR_MSIGS(ARGS)	if (DBG_MSIGS)  TRC(ARGS)
+
+# define DPR(ARGS)		if (dgnc_debug) TRC(ARGS)
+# define P(X)			dgnc_tracef(#X "=%p\n", X)
+# define X(X)			dgnc_tracef(#X "=%x\n", X)
+
+#else//!defined DGNC_TRACER
+
+#define PRINTF_TO_KMEM(args)
+# define TRC(ARGS)
+# define DPR_INIT(ARGS)
+# define DPR_BASIC(ARGS)
+# define DPR_CORE(ARGS)
+# define DPR_OPEN(ARGS)
+# define DPR_CLOSE(ARGS)
+# define DPR_READ(ARGS)
+# define DPR_WRITE(ARGS)
+# define DPR_IOCTL(ARGS)
+# define DPR_PROC(ARGS)
+# define DPR_PARAM(ARGS)
+# define DPR_PSCAN(ARGS)
+# define DPR_EVENT(ARGS)
+# define DPR_DRAIN(ARGS)
+# define DPR_CARR(ARGS)
+# define DPR_MGMT(ARGS)
+# define DPR_INTR(ARGS)
+# define DPR_MSIGS(ARGS)
+
+# define DPR(args)
+
+#endif//DGNC_TRACER
+
+/* Number of boards we support at once. */
+#define	MAXBOARDS	20
+#define	MAXPORTS	8
+#define MAXTTYNAMELEN	200
+
+/* Our 3 magic numbers for our board, channel and unit structs */
+#define DGNC_BOARD_MAGIC	0x5c6df104
+#define DGNC_CHANNEL_MAGIC	0x6c6df104
+#define DGNC_UNIT_MAGIC		0x7c6df104
+
+/* Serial port types */
+#define DGNC_SERIAL		0
+#define DGNC_PRINT		1
+
+#define	SERIAL_TYPE_NORMAL	1
+
+#define PORT_NUM(dev)	((dev) & 0x7f)
+#define IS_PRINT(dev)	(((dev) & 0xff) >= 0x80)
+
+/* MAX number of stop characters we will send when our read queue is getting full */
+#define MAX_STOPS_SENT 5
+
+/* 4 extra for alignment play space */
+#define WRITEBUFLEN		((4096) + 4)
+#define MYFLIPLEN		N_TTY_BUF_SIZE
+
+#define dgnc_jiffies_from_ms(a) (((a) * HZ) / 1000)
+
+/*
+ * Define a local default termios struct. All ports will be created
+ * with this termios initially.  This is the same structure that is defined
+ * as the default in tty_io.c with the same settings overriden as in serial.c
+ *
+ * In short, this should match the internal serial ports' defaults.
+ */
+#define	DEFAULT_IFLAGS	(ICRNL | IXON)
+#define	DEFAULT_OFLAGS	(OPOST | ONLCR)
+#define	DEFAULT_CFLAGS	(B9600 | CS8 | CREAD | HUPCL | CLOCAL)
+#define	DEFAULT_LFLAGS	(ISIG | ICANON | ECHO | ECHOE | ECHOK | \
+			ECHOCTL | ECHOKE | IEXTEN)
+
+#ifndef _POSIX_VDISABLE
+#define   _POSIX_VDISABLE '\0'
+#endif
+
+#define SNIFF_MAX	65536		/* Sniff buffer size (2^n) */
+#define SNIFF_MASK	(SNIFF_MAX - 1)	/* Sniff wrap mask */
+
+/*
+ * Lock function/defines.
+ * Makes spotting lock/unlock locations easier.
+ */
+# define DGNC_SPINLOCK_INIT(x)		spin_lock_init(&(x))
+# define DGNC_LOCK(x,y)			spin_lock_irqsave(&(x), y)
+# define DGNC_UNLOCK(x,y)		spin_unlock_irqrestore(&(x), y)
+
+/*
+ * All the possible states the driver can be while being loaded.
+ */
+enum {
+	DRIVER_INITIALIZED = 0,
+	DRIVER_READY
+};
+
+/*
+ * All the possible states the board can be while booting up.
+ */
+enum {
+	BOARD_FAILED = 0,
+	BOARD_FOUND,
+	BOARD_READY
+};
+
+
+/*************************************************************************
+ *
+ * Structures and closely related defines.
+ *
+ *************************************************************************/
+
+struct board_t;
+struct channel_t;
+
+/************************************************************************
+ * Per board operations structure                                       *
+ ************************************************************************/
+struct board_ops {
+	void (*tasklet) (unsigned long data);
+	irqreturn_t (*intr) (int irq, void *voidbrd);
+	void (*uart_init) (struct channel_t *ch);
+	void (*uart_off) (struct channel_t *ch);
+	int  (*drain) (struct tty_struct *tty, uint seconds);
+	void (*param) (struct tty_struct *tty);
+	void (*vpd) (struct board_t *brd);
+	void (*assert_modem_signals) (struct channel_t *ch);
+	void (*flush_uart_write) (struct channel_t *ch);
+	void (*flush_uart_read) (struct channel_t *ch);
+	void (*disable_receiver) (struct channel_t *ch);
+	void (*enable_receiver) (struct channel_t *ch);
+	void (*send_break) (struct channel_t *ch, int);
+	void (*send_start_character) (struct channel_t *ch);
+	void (*send_stop_character) (struct channel_t *ch);
+	void (*copy_data_from_queue_to_uart) (struct channel_t *ch);
+	uint (*get_uart_bytes_left) (struct channel_t *ch);
+	void (*send_immediate_char) (struct channel_t *ch, unsigned char);
+};
+
+/************************************************************************ 
+ * Device flag definitions for bd_flags.
+ ************************************************************************/
+#define BD_IS_PCI_EXPRESS     0x0001          /* Is a PCI Express board */
+
+
+/*
+ *	Per-board information
+ */
+struct board_t
+{
+	int		magic;		/* Board Magic number.  */
+	int		boardnum;	/* Board number: 0-32 */
+
+	int		type;		/* Type of board */
+	char		*name;		/* Product Name */
+	struct pci_dev	*pdev;		/* Pointer to the pci_dev struct */
+	unsigned long	bd_flags;	/* Board flags */
+	u16		vendor;		/* PCI vendor ID */
+	u16		device;		/* PCI device ID */
+	u16		subvendor;	/* PCI subsystem vendor ID */
+	u16		subdevice;	/* PCI subsystem device ID */
+	uchar		rev;		/* PCI revision ID */
+	uint		pci_bus;	/* PCI bus value */
+	uint		pci_slot;	/* PCI slot value */
+	uint		maxports;	/* MAX ports this board can handle */
+	uchar		dvid;		/* Board specific device id */
+	uchar		vpd[128];	/* VPD of board, if found */
+	uchar		serial_num[20];	/* Serial number of board, if found in VPD */
+
+	spinlock_t	bd_lock;	/* Used to protect board */
+
+	spinlock_t	bd_intr_lock;	/* Used to protect the poller tasklet and
+					 * the interrupt routine from each other.
+					 */
+
+	uint		state;		/* State of card. */
+	wait_queue_head_t state_wait;	/* Place to sleep on for state change */
+
+	struct		tasklet_struct helper_tasklet; /* Poll helper tasklet */
+
+	uint		nasync;		/* Number of ports on card */
+
+	uint		irq;		/* Interrupt request number */
+	ulong		intr_count;	/* Count of interrupts */
+	ulong		intr_modem;	/* Count of interrupts */
+	ulong		intr_tx;	/* Count of interrupts */
+	ulong		intr_rx;	/* Count of interrupts */
+
+	ulong		membase;	/* Start of base memory of the card */
+	ulong		membase_end;	/* End of base memory of the card */
+
+	uchar		*re_map_membase;/* Remapped memory of the card */
+
+	ulong		iobase;		/* Start of io base of the card */
+	ulong		iobase_end;	/* End of io base of the card */
+
+	uint		bd_uart_offset;	/* Space between each UART */
+
+	struct channel_t *channels[MAXPORTS]; /* array of pointers to our channels. */
+
+	struct tty_driver	SerialDriver;
+	char		SerialName[200];
+	struct tty_driver	PrintDriver;
+	char		PrintName[200];
+
+	uint		dgnc_Major_Serial_Registered;
+	uint		dgnc_Major_TransparentPrint_Registered;
+
+	uint		dgnc_Serial_Major;
+	uint		dgnc_TransparentPrint_Major;
+
+	uint		TtyRefCnt;
+
+	char		*flipbuf;	/* Our flip buffer, alloced if board is found */
+
+	u16		dpatype;	/* The board "type", as defined by DPA */
+	u16		dpastatus;	/* The board "status", as defined by DPA */
+
+	/*
+	 *	Mgmt data.
+	 */
+        char		*msgbuf_head;
+        char		*msgbuf;
+
+	uint		bd_dividend;	/* Board/UARTs specific dividend */
+
+	struct board_ops *bd_ops;
+
+	/* /proc/<board> entries */
+	struct proc_dir_entry *proc_entry_pointer;
+	struct dgnc_proc_entry *dgnc_board_table;
+
+};
+
+
+/************************************************************************ 
+ * Unit flag definitions for un_flags.
+ ************************************************************************/
+#define UN_ISOPEN	0x0001		/* Device is open		*/
+#define UN_CLOSING	0x0002		/* Line is being closed		*/
+#define UN_IMM		0x0004		/* Service immediately		*/
+#define UN_BUSY		0x0008		/* Some work this channel	*/
+#define UN_BREAKI	0x0010		/* Input break received		*/
+#define UN_PWAIT	0x0020		/* Printer waiting for terminal	*/
+#define UN_TIME		0x0040		/* Waiting on time		*/
+#define UN_EMPTY	0x0080		/* Waiting output queue empty	*/
+#define UN_LOW		0x0100		/* Waiting output low water mark*/
+#define UN_EXCL_OPEN	0x0200		/* Open for exclusive use	*/
+#define UN_WOPEN	0x0400		/* Device waiting for open	*/
+#define UN_WIOCTL	0x0800		/* Device waiting for open	*/
+#define UN_HANGUP	0x8000		/* Carrier lost			*/
+
+struct device;
+
+/************************************************************************
+ * Structure for terminal or printer unit. 
+ ************************************************************************/
+struct un_t {
+	int	magic;		/* Unit Magic Number.			*/
+	struct	channel_t *un_ch;
+	ulong	un_time;
+	uint	un_type;
+	uint	un_open_count;	/* Counter of opens to port		*/
+	struct tty_struct *un_tty;/* Pointer to unit tty structure	*/
+	uint	un_flags;	/* Unit flags				*/
+	wait_queue_head_t un_flags_wait; /* Place to sleep to wait on unit */
+	uint	un_dev;		/* Minor device number			*/
+	struct device *un_sysfs;
+};
+
+
+/************************************************************************ 
+ * Device flag definitions for ch_flags.
+ ************************************************************************/
+#define CH_PRON		0x0001		/* Printer on string		*/
+#define CH_STOP		0x0002		/* Output is stopped		*/
+#define CH_STOPI	0x0004		/* Input is stopped		*/
+#define CH_CD		0x0008		/* Carrier is present		*/
+#define CH_FCAR		0x0010		/* Carrier forced on		*/
+#define CH_HANGUP       0x0020		/* Hangup received		*/
+
+#define CH_RECEIVER_OFF	0x0040		/* Receiver is off		*/
+#define CH_OPENING	0x0080		/* Port in fragile open state	*/
+#define CH_CLOSING	0x0100		/* Port in fragile close state	*/
+#define CH_FIFO_ENABLED 0x0200		/* Port has FIFOs enabled	*/
+#define CH_TX_FIFO_EMPTY 0x0400		/* TX Fifo is completely empty	*/
+#define CH_TX_FIFO_LWM  0x0800		/* TX Fifo is below Low Water	*/
+#define CH_BREAK_SENDING 0x1000		/* Break is being sent		*/
+#define CH_LOOPBACK 0x2000		/* Channel is in lookback mode	*/
+#define CH_FLIPBUF_IN_USE 0x4000	/* Channel's flipbuf is in use	*/
+#define CH_BAUD0	0x08000		/* Used for checking B0 transitions */
+#define CH_FORCED_STOP  0x20000		/* Output is forcibly stopped	*/ 
+#define CH_FORCED_STOPI 0x40000		/* Input is forcibly stopped	*/
+
+/*
+ * Definitions for ch_sniff_flags
+ */
+#define SNIFF_OPEN	0x1
+#define SNIFF_WAIT_DATA	0x2
+#define SNIFF_WAIT_SPACE 0x4
+
+
+/* Our Read/Error/Write queue sizes */
+#define RQUEUEMASK	0x1FFF		/* 8 K - 1 */
+#define EQUEUEMASK	0x1FFF		/* 8 K - 1 */
+#define WQUEUEMASK	0x0FFF		/* 4 K - 1 */
+#define RQUEUESIZE	(RQUEUEMASK + 1)
+#define EQUEUESIZE	RQUEUESIZE
+#define WQUEUESIZE	(WQUEUEMASK + 1)
+
+
+/************************************************************************ 
+ * Channel information structure.
+ ************************************************************************/
+struct channel_t {
+	int magic;			/* Channel Magic Number		*/
+	struct board_t	*ch_bd;		/* Board structure pointer      */
+	struct digi_t	ch_digi;	/* Transparent Print structure  */
+	struct un_t	ch_tun;		/* Terminal unit info           */
+	struct un_t	ch_pun;		/* Printer unit info            */
+
+	spinlock_t	ch_lock;	/* provide for serialization */
+	wait_queue_head_t ch_flags_wait;
+
+	uint		ch_portnum;	/* Port number, 0 offset.	*/
+	uint		ch_open_count;	/* open count			*/
+	uint		ch_flags;	/* Channel flags                */
+
+	ulong		ch_close_delay;	/* How long we should drop RTS/DTR for */
+
+	ulong		ch_cpstime;	/* Time for CPS calculations    */
+
+	tcflag_t	ch_c_iflag;	/* channel iflags               */
+	tcflag_t	ch_c_cflag;	/* channel cflags               */
+	tcflag_t	ch_c_oflag;	/* channel oflags               */
+	tcflag_t	ch_c_lflag;	/* channel lflags               */
+	uchar		ch_stopc;	/* Stop character               */
+	uchar		ch_startc;	/* Start character              */
+
+	uint		ch_old_baud;	/* Cache of the current baud */
+	uint		ch_custom_speed;/* Custom baud, if set */
+
+	uint		ch_wopen;	/* Waiting for open process cnt */
+
+	uchar		ch_mostat;	/* FEP output modem status      */
+	uchar		ch_mistat;	/* FEP input modem status       */
+
+	struct neo_uart_struct *ch_neo_uart;	/* Pointer to the "mapped" UART struct */
+	struct cls_uart_struct *ch_cls_uart;	/* Pointer to the "mapped" UART struct */
+
+	uchar		ch_cached_lsr;	/* Cached value of the LSR register */
+
+	uchar		*ch_rqueue;	/* Our read queue buffer - malloc'ed */
+	ushort		ch_r_head;	/* Head location of the read queue */
+	ushort		ch_r_tail;	/* Tail location of the read queue */
+
+	uchar		*ch_equeue;	/* Our error queue buffer - malloc'ed */
+	ushort		ch_e_head;	/* Head location of the error queue */
+	ushort		ch_e_tail;	/* Tail location of the error queue */
+
+	uchar		*ch_wqueue;	/* Our write queue buffer - malloc'ed */
+	ushort		ch_w_head;	/* Head location of the write queue */
+	ushort		ch_w_tail;	/* Tail location of the write queue */
+
+	ulong		ch_rxcount;	/* total of data received so far */
+	ulong		ch_txcount;	/* total of data transmitted so far */
+
+	uchar		ch_r_tlevel;	/* Receive Trigger level */
+	uchar		ch_t_tlevel;	/* Transmit Trigger level */
+
+	uchar		ch_r_watermark;	/* Receive Watermark */
+
+	ulong		ch_stop_sending_break;	/* Time we should STOP sending a break */
+
+	uint		ch_stops_sent;	/* How many times I have sent a stop character
+					 * to try to stop the other guy sending.
+					 */
+	ulong		ch_err_parity;	/* Count of parity errors on channel */
+	ulong		ch_err_frame;	/* Count of framing errors on channel */
+	ulong		ch_err_break;	/* Count of breaks on channel */
+	ulong		ch_err_overrun; /* Count of overruns on channel */
+
+	ulong		ch_xon_sends;	/* Count of xons transmitted */
+	ulong		ch_xoff_sends;	/* Count of xoffs transmitted */
+
+	ulong		ch_intr_modem;	/* Count of interrupts */
+	ulong		ch_intr_tx;	/* Count of interrupts */
+	ulong		ch_intr_rx;	/* Count of interrupts */
+
+
+	/* /proc/<board>/<channel> entries */
+	struct proc_dir_entry *proc_entry_pointer;
+	struct dgnc_proc_entry *dgnc_channel_table;
+
+	uint ch_sniff_in;
+	uint ch_sniff_out;
+	char *ch_sniff_buf;		/* Sniff buffer for proc */
+	ulong ch_sniff_flags;		/* Channel flags                */
+	wait_queue_head_t ch_sniff_wait;
+};
+
+
+/*************************************************************************
+ *
+ * Prototypes for non-static functions used in more than one module
+ *
+ *************************************************************************/
+
+extern int		dgnc_ms_sleep(ulong ms);
+extern void		*dgnc_driver_kzmalloc(size_t size, int priority);
+extern char		*dgnc_ioctl_name(int cmd);
+
+/*
+ * Our Global Variables.
+ */
+extern int		dgnc_driver_state;	/* The state of the driver	*/
+extern uint		dgnc_Major;		/* Our driver/mgmt major	*/
+extern int		dgnc_debug;		/* Debug variable		*/
+extern int		dgnc_rawreadok;		/* Set if user wants rawreads	*/
+extern int		dgnc_poll_tick;		/* Poll interval - 20 ms	*/
+extern int		dgnc_trcbuf_size;	/* Size of the ringbuffer	*/
+extern spinlock_t	dgnc_global_lock;	/* Driver global spinlock	*/
+extern uint		dgnc_NumBoards;		/* Total number of boards	*/
+extern struct board_t	*dgnc_Board[MAXBOARDS];	/* Array of board structs	*/
+extern ulong		dgnc_poll_counter;	/* Times the poller has run	*/
+extern char		*dgnc_state_text[];	/* Array of state text		*/
+extern char		*dgnc_driver_state_text[];/* Array of driver state text */
+
+#endif