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
22 #include <linux/config.h>
23 #include <linux/termios.h>
24 #include <linux/tqueue.h>
25 #include <linux/circ_buf.h>
26 #include <linux/wait.h>
27 #if (LINUX_VERSION_CODE < 0x020300)
28 /* Unfortunate, but Linux 2.2 needs async_icount defined here and
29 * it got moved in 2.3 */
30 #include <linux/serial.h>
31 #endif
32
33 struct serial_state {
34 int magic;
35 int baud_base;
36 unsigned long port;
37 int irq;
38 int flags;
39 int hub6;
40 int type;
41 int line;
42 int revision; /* Chip revision (950) */
43 int xmit_fifo_size;
44 int custom_divisor;
45 int count;
46 u8 *iomem_base;
47 u16 iomem_reg_shift;
48 unsigned short close_delay;
49 unsigned short closing_wait; /* time to wait before closing */
50 struct async_icount icount;
51 struct termios normal_termios;
52 struct termios callout_termios;
53 int io_type;
54 struct async_struct *info;
55 };
56
57 struct async_struct {
58 int magic;
59 unsigned long port;
60 int hub6;
61 int flags;
62 int xmit_fifo_size;
63 struct serial_state *state;
64 struct tty_struct *tty;
65 int read_status_mask;
66 int ignore_status_mask;
67 int timeout;
68 int quot;
69 int x_char; /* xon/xoff character */
70 int close_delay;
71 unsigned short closing_wait;
72 unsigned short closing_wait2;
73 int IER; /* Interrupt Enable Register */
74 int MCR; /* Modem control register */
75 int LCR; /* Line control register */
76 int ACR; /* 16950 Additional Control Reg. */
77 unsigned long event;
78 unsigned long last_active;
79 int line;
80 int blocked_open; /* # of blocked opens */
81 long session; /* Session of opening process */
82 long pgrp; /* pgrp of opening process */
83 struct circ_buf xmit;
84 spinlock_t xmit_lock;
85 u8 *iomem_base;
86 u16 iomem_reg_shift;
87 int io_type;
88 struct tq_struct tqueue;
89 #ifdef DECLARE_WAITQUEUE
90 wait_queue_head_t open_wait;
91 wait_queue_head_t close_wait;
92 wait_queue_head_t delta_msr_wait;
93 #else
94 struct wait_queue *open_wait;
95 struct wait_queue *close_wait;
96 struct wait_queue *delta_msr_wait;
97 #endif
98 struct async_struct *next_port; /* For the linked list */
99 struct async_struct *prev_port;
100 };
101
102 #define CONFIGURED_SERIAL_PORT(info) ((info)->port || ((info)->iomem_base))
103
104 #define SERIAL_MAGIC 0x5301
105 #define SSTATE_MAGIC 0x5302
106
107 /*
108 * Events are used to schedule things to happen at timer-interrupt
109 * time, instead of at rs interrupt time.
110 */
111 #define RS_EVENT_WRITE_WAKEUP 0
112
113 /*
114 * Multiport serial configuration structure --- internal structure
115 */
116 struct rs_multiport_struct {
117 int port1;
118 unsigned char mask1, match1;
119 int port2;
120 unsigned char mask2, match2;
121 int port3;
122 unsigned char mask3, match3;
123 int port4;
124 unsigned char mask4, match4;
125 int port_monitor;
126 };
127
128 #if defined(__alpha__) && !defined(CONFIG_PCI)
129 /*
130 * Digital did something really horribly wrong with the OUT1 and OUT2
131 * lines on at least some ALPHA's. The failure mode is that if either
132 * is cleared, the machine locks up with endless interrupts.
133 */
134 #define ALPHA_KLUDGE_MCR (UART_MCR_OUT2 | UART_MCR_OUT1)
135 #else
136 #define ALPHA_KLUDGE_MCR 0
137 #endif
138
139 /*
140 * Structures and definitions for PCI support
141 */
142 struct pci_dev;
143 struct pci_board {
144 unsigned short vendor;
145 unsigned short device;
146 unsigned short subvendor;
147 unsigned short subdevice;
148 int flags;
149 int num_ports;
150 int base_baud;
151 int uart_offset;
152 int reg_shift;
153 int (*init_fn)(struct pci_dev *dev, struct pci_board *board,
154 int enable);
155 int first_uart_offset;
156 };
157
158 struct pci_board_inst {
159 struct pci_board board;
160 struct pci_dev *dev;
161 };
162
163 #ifndef PCI_ANY_ID
164 #define PCI_ANY_ID (~0)
165 #endif
166
167 #define SPCI_FL_BASE_MASK 0x0007
168 #define SPCI_FL_BASE0 0x0000
169 #define SPCI_FL_BASE1 0x0001
170 #define SPCI_FL_BASE2 0x0002
171 #define SPCI_FL_BASE3 0x0003
172 #define SPCI_FL_BASE4 0x0004
173 #define SPCI_FL_GET_BASE(x) (x & SPCI_FL_BASE_MASK)
174
175 #define SPCI_FL_IRQ_MASK (0x0007 << 4)
176 #define SPCI_FL_IRQBASE0 (0x0000 << 4)
177 #define SPCI_FL_IRQBASE1 (0x0001 << 4)
178 #define SPCI_FL_IRQBASE2 (0x0002 << 4)
179 #define SPCI_FL_IRQBASE3 (0x0003 << 4)
180 #define SPCI_FL_IRQBASE4 (0x0004 << 4)
181 #define SPCI_FL_GET_IRQBASE(x) ((x & SPCI_FL_IRQ_MASK) >> 4)
182
183 /* Use sucessive BARs (PCI base address registers),
184 else use offset into some specified BAR */
185 #define SPCI_FL_BASE_TABLE 0x0100
186
187 /* Use successive entries in the irq resource table */
188 #define SPCI_FL_IRQ_TABLE 0x0200
189
190 /* Use the irq resource table instead of dev->irq */
191 #define SPCI_FL_IRQRESOURCE 0x0400
192
193 /* Use the Base address register size to cap number of ports */
194 #define SPCI_FL_REGION_SZ_CAP 0x0800
195
196 /* Do not use irq sharing for this device */
197 #define SPCI_FL_NO_SHIRQ 0x1000
198
199 /* This is a PNP device */
200 #define SPCI_FL_ISPNP 0x2000
201
202 #define SPCI_FL_PNPDEFAULT (SPCI_FL_IRQRESOURCE|SPCI_FL_ISPNP)
203
204 #endif /* _LINUX_SERIAL_H */
205
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