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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * Private header file for the (dumb) serial driver
3 *
4 * Copyright (C) 1997 by Theodore Ts'o.
5 *
6 * Redistribution of this file is permitted under the terms of the GNU
7 * Public License (GPL)
8 */
9
10#ifndef _LINUX_SERIALP_H
11#define _LINUX_SERIALP_H
12
13/*
14 * This is our internal structure for each serial port's state.
15 *
16 * Many fields are paralleled by the structure used by the serial_struct
17 * structure.
18 *
19 * For definitions of the flags field, see tty.h
20 */
21
Linus Torvalds1da177e2005-04-16 15:20:36 -070022#include <linux/config.h>
23#include <linux/termios.h>
24#include <linux/workqueue.h>
25#include <linux/interrupt.h>
26#include <linux/circ_buf.h>
27#include <linux/wait.h>
28
29struct serial_state {
30 int magic;
31 int baud_base;
32 unsigned long port;
33 int irq;
34 int flags;
35 int hub6;
36 int type;
37 int line;
38 int revision; /* Chip revision (950) */
39 int xmit_fifo_size;
40 int custom_divisor;
41 int count;
42 u8 *iomem_base;
43 u16 iomem_reg_shift;
44 unsigned short close_delay;
45 unsigned short closing_wait; /* time to wait before closing */
46 struct async_icount icount;
47 int io_type;
48 struct async_struct *info;
49 struct pci_dev *dev;
50};
51
52struct async_struct {
53 int magic;
54 unsigned long port;
55 int hub6;
56 int flags;
57 int xmit_fifo_size;
58 struct serial_state *state;
59 struct tty_struct *tty;
60 int read_status_mask;
61 int ignore_status_mask;
62 int timeout;
63 int quot;
64 int x_char; /* xon/xoff character */
65 int close_delay;
66 unsigned short closing_wait;
67 unsigned short closing_wait2; /* obsolete */
68 int IER; /* Interrupt Enable Register */
69 int MCR; /* Modem control register */
70 int LCR; /* Line control register */
71 int ACR; /* 16950 Additional Control Reg. */
72 unsigned long event;
73 unsigned long last_active;
74 int line;
75 int blocked_open; /* # of blocked opens */
76 struct circ_buf xmit;
77 spinlock_t xmit_lock;
78 u8 *iomem_base;
79 u16 iomem_reg_shift;
80 int io_type;
81 struct work_struct work;
82 struct tasklet_struct tlet;
83#ifdef DECLARE_WAITQUEUE
84 wait_queue_head_t open_wait;
85 wait_queue_head_t close_wait;
86 wait_queue_head_t delta_msr_wait;
87#else
88 struct wait_queue *open_wait;
89 struct wait_queue *close_wait;
90 struct wait_queue *delta_msr_wait;
91#endif
92 struct async_struct *next_port; /* For the linked list */
93 struct async_struct *prev_port;
94};
95
96#define CONFIGURED_SERIAL_PORT(info) ((info)->port || ((info)->iomem_base))
97
98#define SERIAL_MAGIC 0x5301
99#define SSTATE_MAGIC 0x5302
100
101/*
102 * Events are used to schedule things to happen at timer-interrupt
103 * time, instead of at rs interrupt time.
104 */
105#define RS_EVENT_WRITE_WAKEUP 0
106
107/*
108 * Multiport serial configuration structure --- internal structure
109 */
110struct rs_multiport_struct {
111 int port1;
112 unsigned char mask1, match1;
113 int port2;
114 unsigned char mask2, match2;
115 int port3;
116 unsigned char mask3, match3;
117 int port4;
118 unsigned char mask4, match4;
119 int port_monitor;
120};
121
122#if defined(__alpha__) && !defined(CONFIG_PCI)
123/*
124 * Digital did something really horribly wrong with the OUT1 and OUT2
125 * lines on at least some ALPHA's. The failure mode is that if either
126 * is cleared, the machine locks up with endless interrupts.
127 *
128 * This is still used by arch/mips/au1000/common/serial.c for some weird
129 * reason (mips != alpha!)
130 */
131#define ALPHA_KLUDGE_MCR (UART_MCR_OUT2 | UART_MCR_OUT1)
132#elif defined(CONFIG_SBC8560)
133/*
134 * WindRiver did something similarly broken on their SBC8560 board. The
135 * UART tristates its IRQ output while OUT2 is clear, but they pulled
136 * the interrupt line _up_ instead of down, so if we register the IRQ
137 * while the UART is in that state, we die in an IRQ storm. */
138#define ALPHA_KLUDGE_MCR (UART_MCR_OUT2)
139#else
140#define ALPHA_KLUDGE_MCR 0
141#endif
142
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143#endif /* _LINUX_SERIAL_H */