Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
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 | ||
1da177e4 LT |
22 | #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 | ||
29 | struct 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 | ||
52 | struct 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 | */ | |
110 | struct 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 | ||
1da177e4 | 143 | #endif /* _LINUX_SERIAL_H */ |