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/*
* Private header file for the (dumb) serial driver
*
* Copyright (C) 1997 by Theodore Ts'o.
*
* Redistribution of this file is permitted under the terms of the GNU
* Public License (GPL)
*/
#ifndef _LINUX_SERIALP_H
#define _LINUX_SERIALP_H
/*
* This is our internal structure for each serial port's state.
*
* Many fields are paralleled by the structure used by the serial_struct
* structure.
*
* For definitions of the flags field, see tty.h
*/
#include <linux/termios.h>
#include <linux/workqueue.h>
#include <linux/interrupt.h>
#include <linux/circ_buf.h>
#include <linux/wait.h>
struct serial_state {
int magic;
int baud_base;
unsigned long port;
int irq;
int flags;
int hub6;
int type;
int line;
int revision; /* Chip revision (950) */
int xmit_fifo_size;
int custom_divisor;
int count;
u8 *iomem_base;
u16 iomem_reg_shift;
unsigned short close_delay;
unsigned short closing_wait; /* time to wait before closing */
struct async_icount icount;
int io_type;
struct async_struct *info;
struct pci_dev *dev;
};
struct async_struct {
int magic;
unsigned long port;
int hub6;
int flags;
int xmit_fifo_size;
struct serial_state *state;
struct tty_struct *tty;
int read_status_mask;
int ignore_status_mask;
int timeout;
int quot;
int x_char; /* xon/xoff character */
int close_delay;
unsigned short closing_wait;
unsigned short closing_wait2; /* obsolete */
int IER; /* Interrupt Enable Register */
int MCR; /* Modem control register */
int LCR; /* Line control register */
int ACR; /* 16950 Additional Control Reg. */
unsigned long event;
unsigned long last_active;
int line;
int blocked_open; /* # of blocked opens */
struct circ_buf xmit;
spinlock_t xmit_lock;
u8 *iomem_base;
u16 iomem_reg_shift;
int io_type;
struct work_struct work;
struct tasklet_struct tlet;
#ifdef DECLARE_WAITQUEUE
wait_queue_head_t open_wait;
wait_queue_head_t close_wait;
wait_queue_head_t delta_msr_wait;
#else
struct wait_queue *open_wait;
struct wait_queue *close_wait;
struct wait_queue *delta_msr_wait;
#endif
struct async_struct *next_port; /* For the linked list */
struct async_struct *prev_port;
};
#define CONFIGURED_SERIAL_PORT(info) ((info)->port || ((info)->iomem_base))
#define SERIAL_MAGIC 0x5301
#define SSTATE_MAGIC 0x5302
/*
* Events are used to schedule things to happen at timer-interrupt
* time, instead of at rs interrupt time.
*/
#define RS_EVENT_WRITE_WAKEUP 0
/*
* Multiport serial configuration structure --- internal structure
*/
struct rs_multiport_struct {
int port1;
unsigned char mask1, match1;
int port2;
unsigned char mask2, match2;
int port3;
unsigned char mask3, match3;
int port4;
unsigned char mask4, match4;
int port_monitor;
};
#if defined(__alpha__) && !defined(CONFIG_PCI)
/*
* Digital did something really horribly wrong with the OUT1 and OUT2
* lines on at least some ALPHA's. The failure mode is that if either
* is cleared, the machine locks up with endless interrupts.
*
* This is still used by arch/mips/au1000/common/serial.c for some weird
* reason (mips != alpha!)
*/
#define ALPHA_KLUDGE_MCR (UART_MCR_OUT2 | UART_MCR_OUT1)
#elif defined(CONFIG_SBC8560)
/*
* WindRiver did something similarly broken on their SBC8560 board. The
* UART tristates its IRQ output while OUT2 is clear, but they pulled
* the interrupt line _up_ instead of down, so if we register the IRQ
* while the UART is in that state, we die in an IRQ storm. */
#define ALPHA_KLUDGE_MCR (UART_MCR_OUT2)
#else
#define ALPHA_KLUDGE_MCR 0
#endif
#endif /* _LINUX_SERIAL_H */