[linux-2.6-block.git] / drivers / staging / dgnc / dgnc_driver.h

/*
 * 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.
 *
 *************************************************************************
 *
 * Driver includes
 *
 *************************************************************************/

#ifndef __DGNC_DRIVER_H
#define __DGNC_DRIVER_H

#include <linux/types.h>
#include <linux/tty.h>
#include <linux/interrupt.h>

#include "digi.h"		/* Digi specific ioctl header */
#include "dgnc_sysfs.h"		/* Support for SYSFS */

/*************************************************************************
 *
 * Driver defines
 *
 *************************************************************************/

/* Driver identification and error statments */
#define	PROCSTR		"dgnc"			/* /proc entries	 */
#define	DEVSTR		"/dev/dg/dgnc"		/* /dev entries		 */
#define	DRVSTR		"dgnc"			/* Driver name string	 */
#define	DG_PART		"40002369_F"		/* RPM part number	 */

#define TRC_TO_CONSOLE 1

/* 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 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 overridden 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

/*
 * 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 dgnc_board;
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 dgnc_board *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 dgnc_board {
	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 */
	unsigned char	rev;		/* PCI revision ID */
	uint		pci_bus;	/* PCI bus value */
	uint		pci_slot;	/* PCI slot value */
	uint		maxports;	/* MAX ports this board can handle */
	unsigned char	dvid;		/* Board specific device id */
	unsigned char	vpd[128];	/* VPD of board, if found */
	unsigned char	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		membase;	/* Start of base memory of the card */
	ulong		membase_end;	/* End of base memory of the card */

	u8 __iomem	*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 *serial_driver;
	char		serial_name[200];
	struct tty_driver *print_driver;
	char		print_name[200];

	u16		dpatype;	/* The board "type",
					 * as defined by DPA
					 */
	u16		dpastatus;	/* The board "status",
					 * as defined by DPA
					 */

	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_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	*/

/* 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 dgnc_board	*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	       */
	unsigned char	ch_stopc;	/* Stop character	       */
	unsigned char	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 */

	unsigned char		ch_mostat;	/* FEP output modem status */
	unsigned char		ch_mistat;	/* FEP input modem status */

	struct neo_uart_struct __iomem *ch_neo_uart;	/* Pointer to the
							 * "mapped" UART struct
							 */
	struct cls_uart_struct __iomem *ch_cls_uart;	/* Pointer to the
							 * "mapped" UART struct
							 */

	unsigned char	ch_cached_lsr;	/* Cached value of the LSR register */

	unsigned char	*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 */

	unsigned char	*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 */

	unsigned char	*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 */

	unsigned char		ch_r_tlevel;	/* Receive Trigger level */
	unsigned char		ch_t_tlevel;	/* Transmit Trigger level */

	unsigned char		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 */

	/* /proc/<board>/<channel> entries */
	struct proc_dir_entry *proc_entry_pointer;
	struct dgnc_proc_entry *dgnc_channel_table;

};

/*
 * Our Global Variables.
 */
extern uint		dgnc_major;		/* Our driver/mgmt major */
extern int		dgnc_poll_tick;		/* Poll interval - 20 ms */
extern spinlock_t	dgnc_global_lock;	/* Driver global spinlock */
extern spinlock_t	dgnc_poll_lock;		/* Poll scheduling lock */
extern uint		dgnc_num_boards;	/* Total number of boards */
extern struct dgnc_board	*dgnc_board[MAXBOARDS];	/* Array of board
							 * structs
							 */

#endif
Commit	Line	Data
0b99d589 LL	1	/*
	2	* Copyright 2003 Digi International (www.digi.com)
	3	* Scott H Kilau <Scott_Kilau at digi dot com>
	4	*
	5	* This program is free software; you can redistribute it and/or modify
	6	* it under the terms of the GNU General Public License as published by
	7	* the Free Software Foundation; either version 2, or (at your option)
	8	* any later version.
	9	*
	10	* This program is distributed in the hope that it will be useful,
	11	* but WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED; without even the
	12	* implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
	13	* PURPOSE. See the GNU General Public License for more details.
	14	*
0b99d589 LL	15	*************************************************************************
	16	*
	17	* Driver includes
	18	*
	19	*************************************************************************/
	20
	21	#ifndef __DGNC_DRIVER_H
	22	#define __DGNC_DRIVER_H
	23
f3c709b8 NC	24	#include <linux/types.h>
	25	#include <linux/tty.h>
	26	#include <linux/interrupt.h>
0b99d589	27
4c1c56e6	28	#include "digi.h" /* Digi specific ioctl header */
0b99d589 LL	29	#include "dgnc_sysfs.h" /* Support for SYSFS */
	30
	31	/*************************************************************************
	32	*
	33	* Driver defines
	34	*
	35	*************************************************************************/
	36
2a71a3c7	37	/* Driver identification and error statments */
0b99d589 LL	38	#define PROCSTR "dgnc" /* /proc entries */
0b99d589 LL	39	#define DEVSTR "/dev/dg/dgnc" /* /dev entries */
1f26adc9	40	#define DRVSTR "dgnc" /* Driver name string */
f11cc568	41	#define DG_PART "40002369_F" /* RPM part number */
0b99d589 LL	42
	43	#define TRC_TO_CONSOLE 1
	44
0b99d589 LL	45	/* Number of boards we support at once. */
	46	#define MAXBOARDS 20
	47	#define MAXPORTS 8
	48	#define MAXTTYNAMELEN 200
	49
	50	/* Our 3 magic numbers for our board, channel and unit structs */
	51	#define DGNC_BOARD_MAGIC 0x5c6df104
	52	#define DGNC_CHANNEL_MAGIC 0x6c6df104
	53	#define DGNC_UNIT_MAGIC 0x7c6df104
	54
	55	/* Serial port types */
	56	#define DGNC_SERIAL 0
	57	#define DGNC_PRINT 1
	58
	59	#define SERIAL_TYPE_NORMAL 1
	60
	61	#define PORT_NUM(dev) ((dev) & 0x7f)
	62	#define IS_PRINT(dev) (((dev) & 0xff) >= 0x80)
	63
51c826f0 CM	64	/* MAX number of stop characters we will send
	65	* when our read queue is getting full
	66	*/
0b99d589 LL	67	#define MAX_STOPS_SENT 5
	68
	69	/* 4 extra for alignment play space */
	70	#define WRITEBUFLEN ((4096) + 4)
0b99d589 LL	71
	72	#define dgnc_jiffies_from_ms(a) (((a) * HZ) / 1000)
	73
	74	/*
	75	* Define a local default termios struct. All ports will be created
	76	* with this termios initially. This is the same structure that is defined
d8a76d66	77	* as the default in tty_io.c with the same settings overridden as in serial.c
0b99d589 LL	78	*
	79	* In short, this should match the internal serial ports' defaults.
	80	*/
	81	#define DEFAULT_IFLAGS (ICRNL \| IXON)
	82	#define DEFAULT_OFLAGS (OPOST \| ONLCR)
	83	#define DEFAULT_CFLAGS (B9600 \| CS8 \| CREAD \| HUPCL \| CLOCAL)
	84	#define DEFAULT_LFLAGS (ISIG \| ICANON \| ECHO \| ECHOE \| ECHOK \| \
	85	ECHOCTL \| ECHOKE \| IEXTEN)
	86
	87	#ifndef _POSIX_VDISABLE
	88	#define _POSIX_VDISABLE '\0'
	89	#endif
	90
0b99d589 LL	91	/*
	92	* All the possible states the driver can be while being loaded.
	93	*/
	94	enum {
	95	DRIVER_INITIALIZED = 0,
	96	DRIVER_READY
	97	};
	98
	99	/*
	100	* All the possible states the board can be while booting up.
	101	*/
	102	enum {
	103	BOARD_FAILED = 0,
	104	BOARD_FOUND,
	105	BOARD_READY
	106	};
	107
0b99d589 LL	108	/*************************************************************************
	109	*
	110	* Structures and closely related defines.
	111	*
	112	*************************************************************************/
	113
03425f55	114	struct dgnc_board;
0b99d589 LL	115	struct channel_t;
	116
	117	/************************************************************************
5a62025d	118	* Per board operations structure *
0b99d589 LL	119	************************************************************************/
0b99d589 LL	120	struct board_ops {
f23e875f GK	121	void (*tasklet)(unsigned long data);
	122	irqreturn_t (intr)(int irq, void voidbrd);
	123	void (uart_init)(struct channel_t ch);
	124	void (uart_off)(struct channel_t ch);
	125	int (drain)(struct tty_struct tty, uint seconds);
	126	void (param)(struct tty_struct tty);
	127	void (vpd)(struct dgnc_board brd);
	128	void (assert_modem_signals)(struct channel_t ch);
	129	void (flush_uart_write)(struct channel_t ch);
	130	void (flush_uart_read)(struct channel_t ch);
	131	void (disable_receiver)(struct channel_t ch);
	132	void (enable_receiver)(struct channel_t ch);
	133	void (send_break)(struct channel_t ch, int);
	134	void (send_start_character)(struct channel_t ch);
	135	void (send_stop_character)(struct channel_t ch);
	136	void (copy_data_from_queue_to_uart)(struct channel_t ch);
	137	uint (get_uart_bytes_left)(struct channel_t ch);
	138	void (send_immediate_char)(struct channel_t ch, unsigned char);
0b99d589 LL	139	};
0b99d589 LL	140
4c1c56e6	141	/************************************************************************
0b99d589 LL	142	* Device flag definitions for bd_flags.
0b99d589 LL	143	************************************************************************/
5a62025d	144	#define BD_IS_PCI_EXPRESS 0x0001 /* Is a PCI Express board */
0b99d589	145
0b99d589 LL	146	/*
	147	* Per-board information
	148	*/
03425f55	149	struct dgnc_board {
0b99d589 LL	150	int magic; /* Board Magic number. */
	151	int boardnum; /* Board number: 0-32 */
	152
	153	int type; /* Type of board */
	154	char name; / Product Name */
	155	struct pci_dev pdev; / Pointer to the pci_dev struct */
	156	unsigned long bd_flags; /* Board flags */
	157	u16 vendor; /* PCI vendor ID */
	158	u16 device; /* PCI device ID */
	159	u16 subvendor; /* PCI subsystem vendor ID */
	160	u16 subdevice; /* PCI subsystem device ID */
446393e9	161	unsigned char rev; /* PCI revision ID */
0b99d589 LL	162	uint pci_bus; /* PCI bus value */
	163	uint pci_slot; /* PCI slot value */
	164	uint maxports; /* MAX ports this board can handle */
446393e9 EA	165	unsigned char dvid; /* Board specific device id */
446393e9 EA	166	unsigned char vpd[128]; /* VPD of board, if found */
51c826f0 CM	167	unsigned char serial_num[20]; /* Serial number of board,
	168	* if found in VPD
	169	*/
0b99d589 LL	170
	171	spinlock_t bd_lock; /* Used to protect board */
	172
51c826f0 CM	173	spinlock_t bd_intr_lock; /* Used to protect the poller tasklet
	174	* and the interrupt routine from each
	175	* other.
0b99d589 LL	176	*/
	177
	178	uint state; /* State of card. */
	179	wait_queue_head_t state_wait; /* Place to sleep on for state change */
	180
	181	struct tasklet_struct helper_tasklet; /* Poll helper tasklet */
	182
	183	uint nasync; /* Number of ports on card */
	184
	185	uint irq; /* Interrupt request number */
0b99d589 LL	186
	187	ulong membase; /* Start of base memory of the card */
	188	ulong membase_end; /* End of base memory of the card */
	189
51c826f0	190	u8 __iomem re_map_membase; / Remapped memory of the card */
0b99d589 LL	191
	192	ulong iobase; /* Start of io base of the card */
	193	ulong iobase_end; /* End of io base of the card */
	194
	195	uint bd_uart_offset; /* Space between each UART */
	196
51c826f0 CM	197	struct channel_t channels[MAXPORTS]; / array of pointers
	198	* to our channels.
	199	*/
0b99d589	200
60b3109e	201	struct tty_driver *serial_driver;
a25ad520	202	char serial_name[200];
60b3109e	203	struct tty_driver *print_driver;
a25ad520	204	char print_name[200];
0b99d589	205
51c826f0 CM	206	u16 dpatype; /* The board "type",
	207	* as defined by DPA
	208	*/
	209	u16 dpastatus; /* The board "status",
	210	* as defined by DPA
	211	*/
0b99d589	212
0b99d589 LL	213	uint bd_dividend; /* Board/UARTs specific dividend */
	214
	215	struct board_ops *bd_ops;
	216
	217	/* /proc/<board> entries */
	218	struct proc_dir_entry *proc_entry_pointer;
	219	struct dgnc_proc_entry *dgnc_board_table;
	220
	221	};
	222
4c1c56e6	223	/************************************************************************
0b99d589 LL	224	* Unit flag definitions for un_flags.
	225	************************************************************************/
	226	#define UN_ISOPEN 0x0001 /* Device is open */
	227	#define UN_CLOSING 0x0002 /* Line is being closed */
	228	#define UN_IMM 0x0004 /* Service immediately */
	229	#define UN_BUSY 0x0008 /* Some work this channel */
	230	#define UN_BREAKI 0x0010 /* Input break received */
	231	#define UN_PWAIT 0x0020 /* Printer waiting for terminal */
	232	#define UN_TIME 0x0040 /* Waiting on time */
	233	#define UN_EMPTY 0x0080 /* Waiting output queue empty */
	234	#define UN_LOW 0x0100 /* Waiting output low water mark*/
	235	#define UN_EXCL_OPEN 0x0200 /* Open for exclusive use */
	236	#define UN_WOPEN 0x0400 /* Device waiting for open */
	237	#define UN_WIOCTL 0x0800 /* Device waiting for open */
	238	#define UN_HANGUP 0x8000 /* Carrier lost */
	239
	240	struct device;
	241
	242	/************************************************************************
4c1c56e6	243	* Structure for terminal or printer unit.
0b99d589 LL	244	************************************************************************/
	245	struct un_t {
	246	int magic; /* Unit Magic Number. */
	247	struct channel_t *un_ch;
	248	ulong un_time;
	249	uint un_type;
	250	uint un_open_count; /* Counter of opens to port */
	251	struct tty_struct un_tty;/ Pointer to unit tty structure */
	252	uint un_flags; /* Unit flags */
	253	wait_queue_head_t un_flags_wait; /* Place to sleep to wait on unit */
	254	uint un_dev; /* Minor device number */
	255	struct device *un_sysfs;
	256	};
	257
4c1c56e6	258	/************************************************************************
0b99d589 LL	259	* Device flag definitions for ch_flags.
	260	************************************************************************/
	261	#define CH_PRON 0x0001 /* Printer on string */
	262	#define CH_STOP 0x0002 /* Output is stopped */
	263	#define CH_STOPI 0x0004 /* Input is stopped */
	264	#define CH_CD 0x0008 /* Carrier is present */
	265	#define CH_FCAR 0x0010 /* Carrier forced on */
	266	#define CH_HANGUP 0x0020 /* Hangup received */
	267
	268	#define CH_RECEIVER_OFF 0x0040 /* Receiver is off */
	269	#define CH_OPENING 0x0080 /* Port in fragile open state */
	270	#define CH_CLOSING 0x0100 /* Port in fragile close state */
	271	#define CH_FIFO_ENABLED 0x0200 /* Port has FIFOs enabled */
	272	#define CH_TX_FIFO_EMPTY 0x0400 /* TX Fifo is completely empty */
	273	#define CH_TX_FIFO_LWM 0x0800 /* TX Fifo is below Low Water */
	274	#define CH_BREAK_SENDING 0x1000 /* Break is being sent */
	275	#define CH_LOOPBACK 0x2000 /* Channel is in lookback mode */
0b99d589	276	#define CH_BAUD0 0x08000 /* Used for checking B0 transitions */
4c1c56e6	277	#define CH_FORCED_STOP 0x20000 /* Output is forcibly stopped */
0b99d589 LL	278	#define CH_FORCED_STOPI 0x40000 /* Input is forcibly stopped */
0b99d589 LL	279
0b99d589 LL	280	/* Our Read/Error/Write queue sizes */
	281	#define RQUEUEMASK 0x1FFF /* 8 K - 1 */
	282	#define EQUEUEMASK 0x1FFF /* 8 K - 1 */
	283	#define WQUEUEMASK 0x0FFF /* 4 K - 1 */
	284	#define RQUEUESIZE (RQUEUEMASK + 1)
	285	#define EQUEUESIZE RQUEUESIZE
	286	#define WQUEUESIZE (WQUEUEMASK + 1)
	287
4c1c56e6	288	/************************************************************************
0b99d589 LL	289	* Channel information structure.
	290	************************************************************************/
	291	struct channel_t {
	292	int magic; /* Channel Magic Number */
51c826f0	293	struct dgnc_board ch_bd; / Board structure pointer */
0b99d589	294	struct digi_t ch_digi; /* Transparent Print structure */
5a62025d LL	295	struct un_t ch_tun; /* Terminal unit info */
5a62025d LL	296	struct un_t ch_pun; /* Printer unit info */
0b99d589 LL	297
	298	spinlock_t ch_lock; /* provide for serialization */
	299	wait_queue_head_t ch_flags_wait;
	300
	301	uint ch_portnum; /* Port number, 0 offset. */
	302	uint ch_open_count; /* open count */
5a62025d	303	uint ch_flags; /* Channel flags */
0b99d589	304
51c826f0 CM	305	ulong ch_close_delay; /* How long we should
	306	* drop RTS/DTR for
	307	*/
0b99d589 LL	308
	309	ulong ch_cpstime; /* Time for CPS calculations */
	310
5a62025d LL	311	tcflag_t ch_c_iflag; /* channel iflags */
	312	tcflag_t ch_c_cflag; /* channel cflags */
	313	tcflag_t ch_c_oflag; /* channel oflags */
	314	tcflag_t ch_c_lflag; /* channel lflags */
446393e9 EA	315	unsigned char ch_stopc; /* Stop character */
446393e9 EA	316	unsigned char ch_startc; /* Start character */
0b99d589 LL	317
	318	uint ch_old_baud; /* Cache of the current baud */
	319	uint ch_custom_speed;/* Custom baud, if set */
	320
	321	uint ch_wopen; /* Waiting for open process cnt */
	322
51c826f0 CM	323	unsigned char ch_mostat; /* FEP output modem status */
51c826f0 CM	324	unsigned char ch_mistat; /* FEP input modem status */
0b99d589	325
51c826f0 CM	326	struct neo_uart_struct __iomem ch_neo_uart; / Pointer to the
	327	* "mapped" UART struct
	328	*/
	329	struct cls_uart_struct __iomem ch_cls_uart; / Pointer to the
	330	* "mapped" UART struct
	331	*/
0b99d589	332
446393e9	333	unsigned char ch_cached_lsr; /* Cached value of the LSR register */
0b99d589	334
446393e9	335	unsigned char ch_rqueue; / Our read queue buffer - malloc'ed */
0b99d589 LL	336	ushort ch_r_head; /* Head location of the read queue */
	337	ushort ch_r_tail; /* Tail location of the read queue */
	338
446393e9	339	unsigned char ch_equeue; / Our error queue buffer - malloc'ed */
0b99d589 LL	340	ushort ch_e_head; /* Head location of the error queue */
	341	ushort ch_e_tail; /* Tail location of the error queue */
	342
446393e9	343	unsigned char ch_wqueue; / Our write queue buffer - malloc'ed */
0b99d589 LL	344	ushort ch_w_head; /* Head location of the write queue */
	345	ushort ch_w_tail; /* Tail location of the write queue */
	346
	347	ulong ch_rxcount; /* total of data received so far */
	348	ulong ch_txcount; /* total of data transmitted so far */
	349
446393e9 EA	350	unsigned char ch_r_tlevel; /* Receive Trigger level */
446393e9 EA	351	unsigned char ch_t_tlevel; /* Transmit Trigger level */
0b99d589	352
446393e9	353	unsigned char ch_r_watermark; /* Receive Watermark */
0b99d589	354
51c826f0 CM	355	ulong ch_stop_sending_break; /* Time we should STOP
	356	* sending a break
	357	*/
0b99d589	358
51c826f0 CM	359	uint ch_stops_sent; /* How many times I have sent a stop
	360	* character to try to stop the other
	361	* guy sending.
0b99d589 LL	362	*/
	363	ulong ch_err_parity; /* Count of parity errors on channel */
	364	ulong ch_err_frame; /* Count of framing errors on channel */
	365	ulong ch_err_break; /* Count of breaks on channel */
	366	ulong ch_err_overrun; /* Count of overruns on channel */
	367
	368	ulong ch_xon_sends; /* Count of xons transmitted */
	369	ulong ch_xoff_sends; /* Count of xoffs transmitted */
	370
0b99d589 LL	371	/* /proc/<board>/<channel> entries */
	372	struct proc_dir_entry *proc_entry_pointer;
	373	struct dgnc_proc_entry *dgnc_channel_table;
	374
0b99d589 LL	375	};
0b99d589 LL	376
0b99d589 LL	377	/*
	378	* Our Global Variables.
	379	*/
80e3e241	380	extern uint dgnc_major; /* Our driver/mgmt major */
9e39ab27 VH	381	extern int dgnc_poll_tick; /* Poll interval - 20 ms */
9e39ab27 VH	382	extern spinlock_t dgnc_global_lock; /* Driver global spinlock */
51abf45c	383	extern spinlock_t dgnc_poll_lock; /* Poll scheduling lock */
f56edd42	384	extern uint dgnc_num_boards; /* Total number of boards */
80e3e241	385	extern struct dgnc_board dgnc_board[MAXBOARDS]; / Array of board
51c826f0 CM	386	* structs
51c826f0 CM	387	*/
0b99d589 LL	388
0b99d589 LL	389	#endif