blob: 2b2f35a64d7510e5436c40bd1ff5caa0b258c7f9 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
|
/*
* 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
/*
* Definitions for PCI support.
*/
#define SPCI_FL_BASE_MASK 0x0007
#define SPCI_FL_BASE0 0x0000
#define SPCI_FL_BASE1 0x0001
#define SPCI_FL_BASE2 0x0002
#define SPCI_FL_BASE3 0x0003
#define SPCI_FL_BASE4 0x0004
#define SPCI_FL_GET_BASE(x) (x & SPCI_FL_BASE_MASK)
#define SPCI_FL_IRQ_MASK (0x0007 << 4)
#define SPCI_FL_IRQBASE0 (0x0000 << 4)
#define SPCI_FL_IRQBASE1 (0x0001 << 4)
#define SPCI_FL_IRQBASE2 (0x0002 << 4)
#define SPCI_FL_IRQBASE3 (0x0003 << 4)
#define SPCI_FL_IRQBASE4 (0x0004 << 4)
#define SPCI_FL_GET_IRQBASE(x) ((x & SPCI_FL_IRQ_MASK) >> 4)
/* Use successive BARs (PCI base address registers),
else use offset into some specified BAR */
#define SPCI_FL_BASE_TABLE 0x0100
/* Use successive entries in the irq resource table */
#define SPCI_FL_IRQ_TABLE 0x0200
/* Use the irq resource table instead of dev->irq */
#define SPCI_FL_IRQRESOURCE 0x0400
/* Use the Base address register size to cap number of ports */
#define SPCI_FL_REGION_SZ_CAP 0x0800
/* Do not use irq sharing for this device */
#define SPCI_FL_NO_SHIRQ 0x1000
/* This is a PNP device */
#define SPCI_FL_ISPNP 0x2000
#define SPCI_FL_PNPDEFAULT (SPCI_FL_IRQRESOURCE|SPCI_FL_ISPNP)
#endif /* _LINUX_SERIAL_H */
|
