serialP.h
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上传日期:2009-04-28
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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/config.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 */