Release 4.18 drivers/staging/dgnc/dgnc_driver.h
/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Copyright 2003 Digi International (www.digi.com)
* Scott H Kilau <Scott_Kilau at digi dot com>
*/
#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 */
/* Driver identification and error statements */
#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
/* 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 sent 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)
#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
};
struct dgnc_board;
struct channel_t;
/**
* struct board_ops - Per board operations.
*/
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 (*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 msec);
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 c);
};
/**
* struct dgnc_board - Per board information.
* @boardnum: Board number (0 - 32).
*
* @name: Product name.
* @pdev: Pointer to the pci_dev structure.
* @device: PCI device ID.
* @maxports: Maximum ports this board can handle.
* @bd_lock: Used to protect board.
* @bd_intr_lock: Protect poller tasklet and interrupt routine from each other.
* @state: State of the card.
* @state_wait: Queue to sleep on for state change.
* @helper_tasklet: Poll helper tasklet.
* @nasync: Number of ports on card.
* @irq: Interrupt request number.
* @membase: Start of base memory of the card.
* @membase_end: End of base memory of the card.
* @iobase: Start of IO base of the card.
* @iobase_end: End of IO base of the card.
* @bd_uart_offset: Space between each UART.
* @channels: array of pointers to our channels.
* @serial_driver: Pointer to the serial driver.
* @serial_name: Serial driver name.
* @print_dirver: Pointer to the print driver.
* @print_name: Print driver name.
* @bd_dividend: Board/UART's specific dividend.
* @bd_ops: Pointer to board operations structure.
*/
struct dgnc_board {
int boardnum;
char *name;
struct pci_dev *pdev;
u16 device;
uint maxports;
/* used to protect the board */
spinlock_t bd_lock;
/* Protect poller tasklet and interrupt routine from each other. */
spinlock_t bd_intr_lock;
uint state;
wait_queue_head_t state_wait;
struct tasklet_struct helper_tasklet;
uint nasync;
uint irq;
ulong membase;
ulong membase_end;
u8 __iomem *re_map_membase;
ulong iobase;
ulong iobase_end;
uint bd_uart_offset;
struct channel_t *channels[MAXPORTS];
struct tty_driver *serial_driver;
char serial_name[200];
struct tty_driver *print_driver;
char print_name[200];
uint bd_dividend;
struct board_ops *bd_ops;
};
/* 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;
/**
* struct un_t - terminal or printer unit
* @un_open_count: Counter of opens to port.
* @un_tty: Pointer to unit tty structure.
* @un_flags: Unit flags.
* @un_flags_wait: Place to sleep to wait on unit.
* @un_dev: Minor device number.
*/
struct un_t {
struct channel_t *un_ch;
uint un_type;
uint un_open_count;
struct tty_struct *un_tty;
uint un_flags;
wait_queue_head_t un_flags_wait;
uint un_dev;
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)
/**
* struct channel_t - Channel information.
* @dgnc_board: Pointer to board structure.
* @ch_bd: Transparent print structure.
* @ch_tun: Terminal unit information.
* @ch_pun: Printer unit information.
* @ch_lock: Provide for serialization.
* @ch_flags_wait: Channel flags wait queue.
* @ch_portnum: Port number, 0 offset.
* @ch_open_count: Open count.
* @ch_flags: Channel flags.
* @ch_close_delay: How long we should drop RTS/DTR for.
* @ch_cpstime: Time for CPS calculations.
* @ch_c_iflag: Channel iflags.
* @ch_c_cflag: Channel cflags.
* @ch_c_oflag: Channel oflags.
* @ch_c_lflag: Channel lflags.
* @ch_stopc: Stop character.
* @ch_startc: Start character.
* @ch_old_baud: Cache of the current baud rate.
* @ch_custom_speed: Custom baud rate, if set.
* @ch_wopen: Waiting for open process count.
* @ch_mostat: FEP output modem status.
* @ch_mistat: FEP input modem status.
* @ch_cls_uart: Pointer to the mapped cls UART struct
* @ch_cached_lsr: Cached value of the LSR register.
* @ch_rqueue: Read queue buffer, malloc'ed.
* @ch_r_head: Head location of the read queue.
* @ch_r_tail: Tail location of the read queue.
* @ch_equeue: Error queue buffer, malloc'ed.
* @ch_e_head: Head location of the error queue.
* @ch_e_tail: Tail location of the error queue.
* @ch_wqueue: Write queue buffer, malloc'ed.
* @ch_w_head: Head location of the write queue.
* @ch_w_tail: Tail location of the write queue.
* @ch_rxcount: Total of data received so far.
* @ch_txcount: Total of data transmitted so far.
* @ch_r_tlevel: Receive trigger level.
* @ch_t_tlevel: Transmit trigger level.
* @ch_r_watermark: Receive water mark.
* @ch_stop_sending_break: Time we should STOP sending a break.
* @ch_stops_sent: How many times I have send a stop character to try
* to stop the other guy sending.
* @ch_err_parity: Count of parity
* @ch_err_frame: Count of framing errors on channel.
* @ch_err_break: Count of breaks on channel.
* @ch_err_overrun: Count of overruns on channel.
* @ch_xon_sends: Count of xons transmitted.
* @ch_xoff_sends: Count of xoffs transmitted.
*/
struct channel_t {
struct dgnc_board *ch_bd;
struct digi_t ch_digi;
struct un_t ch_tun;
struct un_t ch_pun;
spinlock_t ch_lock; /* provide for serialization */
wait_queue_head_t ch_flags_wait;
uint ch_portnum;
uint ch_open_count;
uint ch_flags;
ulong ch_close_delay;
ulong ch_cpstime;
tcflag_t ch_c_iflag;
tcflag_t ch_c_cflag;
tcflag_t ch_c_oflag;
tcflag_t ch_c_lflag;
unsigned char ch_stopc;
unsigned char ch_startc;
uint ch_old_baud;
uint ch_custom_speed;
uint ch_wopen;
unsigned char ch_mostat;
unsigned char ch_mistat;
struct cls_uart_struct __iomem *ch_cls_uart;
unsigned char ch_cached_lsr;
unsigned char *ch_rqueue;
ushort ch_r_head;
ushort ch_r_tail;
unsigned char *ch_equeue;
ushort ch_e_head;
ushort ch_e_tail;
unsigned char *ch_wqueue;
ushort ch_w_head;
ushort ch_w_tail;
ulong ch_rxcount;
ulong ch_txcount;
unsigned char ch_r_tlevel;
unsigned char ch_t_tlevel;
unsigned char ch_r_watermark;
ulong ch_stop_sending_break;
uint ch_stops_sent;
ulong ch_err_parity;
ulong ch_err_frame;
ulong ch_err_break;
ulong ch_err_overrun;
ulong ch_xon_sends;
ulong ch_xoff_sends;
};
extern struct dgnc_board *dgnc_board[MAXBOARDS];/* Array of boards */
#endif /* _DGNC_DRIVER_H */
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