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001: /*
002:  * include/linux/serial.h
003:  *
004:  * Copyright (C) 1992 by Theodore Ts'o.
005:  * 
006:  * Redistribution of this file is permitted under the terms of the GNU 
007:  * Public License (GPL)
008:  */
009: 
010: #ifndef _LINUX_SERIAL_H
011: #define _LINUX_SERIAL_H
012: 
013: #include <linux/types.h>
014: 
015: 
016: struct serial_struct {
017:         int     type;
018:         int     line;
019:         unsigned int    port;
020:         int     irq;
021:         int     flags;
022:         int     xmit_fifo_size;
023:         int     custom_divisor;
024:         int     baud_base;
025:         unsigned short  close_delay;
026:         char    io_type;
027:         char    reserved_char[1];
028:         int     hub6;
029:         unsigned short  closing_wait; /* time to wait before closing */
030:         unsigned short  closing_wait2; /* no longer used... */
031:         unsigned char   *iomem_base;
032:         unsigned short  iomem_reg_shift;
033:         unsigned int    port_high;
034:         unsigned long   iomap_base;     /* cookie passed into ioremap */
035: };
036: 
037: /*
038:  * For the close wait times, 0 means wait forever for serial port to
039:  * flush its output.  65535 means don't wait at all.
040:  */
041: #define ASYNC_CLOSING_WAIT_INF  0
042: #define ASYNC_CLOSING_WAIT_NONE 65535
043: 
044: /*
045:  * These are the supported serial types.
046:  */
047: #define PORT_UNKNOWN    0
048: #define PORT_8250       1
049: #define PORT_16450      2
050: #define PORT_16550      3
051: #define PORT_16550A     4
052: #define PORT_CIRRUS     5       /* usurped by cyclades.c */
053: #define PORT_16650      6
054: #define PORT_16650V2    7
055: #define PORT_16750      8
056: #define PORT_STARTECH   9       /* usurped by cyclades.c */
057: #define PORT_16C950     10      /* Oxford Semiconductor */
058: #define PORT_16654      11
059: #define PORT_16850      12
060: #define PORT_RSA        13      /* RSA-DV II/S card */
061: #define PORT_MAX        13
062: 
063: #define SERIAL_IO_PORT  0
064: #define SERIAL_IO_HUB6  1
065: #define SERIAL_IO_MEM   2
066: 
067: struct serial_uart_config {
068:         char    *name;
069:         int     dfl_xmit_fifo_size;
070:         int     flags;
071: };
072: 
073: #define UART_CLEAR_FIFO         0x01
074: #define UART_USE_FIFO           0x02
075: #define UART_STARTECH           0x04
076: #define UART_NATSEMI            0x08
077: 
078: /*
079:  * Definitions for async_struct (and serial_struct) flags field
080:  *
081:  * Define ASYNCB_* for convenient use with {test,set,clear}_bit.
082:  */
083: #define ASYNCB_HUP_NOTIFY        0 /* Notify getty on hangups and closes
084:                                     * on the callout port */
085: #define ASYNCB_FOURPORT          1 /* Set OU1, OUT2 per AST Fourport settings */
086: #define ASYNCB_SAK               2 /* Secure Attention Key (Orange book) */
087: #define ASYNCB_SPLIT_TERMIOS     3 /* Separate termios for dialin/callout */
088: #define ASYNCB_SPD_HI            4 /* Use 56000 instead of 38400 bps */
089: #define ASYNCB_SPD_VHI           5 /* Use 115200 instead of 38400 bps */
090: #define ASYNCB_SKIP_TEST         6 /* Skip UART test during autoconfiguration */
091: #define ASYNCB_AUTO_IRQ          7 /* Do automatic IRQ during
092:                                     * autoconfiguration */
093: #define ASYNCB_SESSION_LOCKOUT   8 /* Lock out cua opens based on session */
094: #define ASYNCB_PGRP_LOCKOUT      9 /* Lock out cua opens based on pgrp */
095: #define ASYNCB_CALLOUT_NOHUP    10 /* Don't do hangups for cua device */
096: #define ASYNCB_HARDPPS_CD       11 /* Call hardpps when CD goes high  */
097: #define ASYNCB_SPD_SHI          12 /* Use 230400 instead of 38400 bps */
098: #define ASYNCB_LOW_LATENCY      13 /* Request low latency behaviour */
099: #define ASYNCB_BUGGY_UART       14 /* This is a buggy UART, skip some safety
100:                                     * checks.  Note: can be dangerous! */
101: #define ASYNCB_AUTOPROBE        15 /* Port was autoprobed by PCI or PNP code */
102: #define ASYNCB_LAST_USER        15
103: 
104: /* Internal flags used only by kernel */
105: #define ASYNCB_INITIALIZED      31 /* Serial port was initialized */
106: #define ASYNCB_SUSPENDED        30 /* Serial port is suspended */
107: #define ASYNCB_NORMAL_ACTIVE    29 /* Normal device is active */
108: #define ASYNCB_BOOT_AUTOCONF    28 /* Autoconfigure port on bootup */
109: #define ASYNCB_CLOSING          27 /* Serial port is closing */
110: #define ASYNCB_CTS_FLOW         26 /* Do CTS flow control */
111: #define ASYNCB_CHECK_CD         25 /* i.e., CLOCAL */
112: #define ASYNCB_SHARE_IRQ        24 /* for multifunction cards, no longer used */
113: #define ASYNCB_CONS_FLOW        23 /* flow control for console  */
114: #define ASYNCB_BOOT_ONLYMCA     22 /* Probe only if MCA bus */
115: #define ASYNCB_FIRST_KERNEL     22
116: 
117: #define ASYNC_HUP_NOTIFY        (1U << ASYNCB_HUP_NOTIFY)
118: #define ASYNC_SUSPENDED         (1U << ASYNCB_SUSPENDED)
119: #define ASYNC_FOURPORT          (1U << ASYNCB_FOURPORT)
120: #define ASYNC_SAK               (1U << ASYNCB_SAK)
121: #define ASYNC_SPLIT_TERMIOS     (1U << ASYNCB_SPLIT_TERMIOS)
122: #define ASYNC_SPD_HI            (1U << ASYNCB_SPD_HI)
123: #define ASYNC_SPD_VHI           (1U << ASYNCB_SPD_VHI)
124: #define ASYNC_SKIP_TEST         (1U << ASYNCB_SKIP_TEST)
125: #define ASYNC_AUTO_IRQ          (1U << ASYNCB_AUTO_IRQ)
126: #define ASYNC_SESSION_LOCKOUT   (1U << ASYNCB_SESSION_LOCKOUT)
127: #define ASYNC_PGRP_LOCKOUT      (1U << ASYNCB_PGRP_LOCKOUT)
128: #define ASYNC_CALLOUT_NOHUP     (1U << ASYNCB_CALLOUT_NOHUP)
129: #define ASYNC_HARDPPS_CD        (1U << ASYNCB_HARDPPS_CD)
130: #define ASYNC_SPD_SHI           (1U << ASYNCB_SPD_SHI)
131: #define ASYNC_LOW_LATENCY       (1U << ASYNCB_LOW_LATENCY)
132: #define ASYNC_BUGGY_UART        (1U << ASYNCB_BUGGY_UART)
133: #define ASYNC_AUTOPROBE         (1U << ASYNCB_AUTOPROBE)
134: 
135: #define ASYNC_FLAGS             ((1U << (ASYNCB_LAST_USER + 1)) - 1)
136: #define ASYNC_USR_MASK          (ASYNC_SPD_HI|ASYNC_SPD_VHI| \
137:                 ASYNC_CALLOUT_NOHUP|ASYNC_SPD_SHI|ASYNC_LOW_LATENCY)
138: #define ASYNC_SPD_CUST          (ASYNC_SPD_HI|ASYNC_SPD_VHI)
139: #define ASYNC_SPD_WARP          (ASYNC_SPD_HI|ASYNC_SPD_SHI)
140: #define ASYNC_SPD_MASK          (ASYNC_SPD_HI|ASYNC_SPD_VHI|ASYNC_SPD_SHI)
141: 
142: #define ASYNC_INITIALIZED       (1U << ASYNCB_INITIALIZED)
143: #define ASYNC_NORMAL_ACTIVE     (1U << ASYNCB_NORMAL_ACTIVE)
144: #define ASYNC_BOOT_AUTOCONF     (1U << ASYNCB_BOOT_AUTOCONF)
145: #define ASYNC_CLOSING           (1U << ASYNCB_CLOSING)
146: #define ASYNC_CTS_FLOW          (1U << ASYNCB_CTS_FLOW)
147: #define ASYNC_CHECK_CD          (1U << ASYNCB_CHECK_CD)
148: #define ASYNC_SHARE_IRQ         (1U << ASYNCB_SHARE_IRQ)
149: #define ASYNC_CONS_FLOW         (1U << ASYNCB_CONS_FLOW)
150: #define ASYNC_BOOT_ONLYMCA      (1U << ASYNCB_BOOT_ONLYMCA)
151: #define ASYNC_INTERNAL_FLAGS    (~((1U << ASYNCB_FIRST_KERNEL) - 1))
152: 
153: /*
154:  * Multiport serial configuration structure --- external structure
155:  */
156: struct serial_multiport_struct {
157:         int             irq;
158:         int             port1;
159:         unsigned char   mask1, match1;
160:         int             port2;
161:         unsigned char   mask2, match2;
162:         int             port3;
163:         unsigned char   mask3, match3;
164:         int             port4;
165:         unsigned char   mask4, match4;
166:         int             port_monitor;
167:         int     reserved[32];
168: };
169: 
170: /*
171:  * Serial input interrupt line counters -- external structure
172:  * Four lines can interrupt: CTS, DSR, RI, DCD
173:  */
174: struct serial_icounter_struct {
175:         int cts, dsr, rng, dcd;
176:         int rx, tx;
177:         int frame, overrun, parity, brk;
178:         int buf_overrun;
179:         int reserved[9];
180: };
181: 
182: /*
183:  * Serial interface for controlling RS485 settings on chips with suitable
184:  * support. Set with TIOCSRS485 and get with TIOCGRS485 if supported by your
185:  * platform. The set function returns the new state, with any unsupported bits
186:  * reverted appropriately.
187:  */
188: 
189: struct serial_rs485 {
190:         __u32   flags;                  /* RS485 feature flags */
191: #define SER_RS485_ENABLED               (1 << 0)        /* If enabled */
192: #define SER_RS485_RTS_ON_SEND           (1 << 1)        /* Logical level for
193:                                                            RTS pin when
194:                                                            sending */
195: #define SER_RS485_RTS_AFTER_SEND        (1 << 2)        /* Logical level for
196:                                                            RTS pin after sent*/
197: #define SER_RS485_RX_DURING_TX          (1 << 4)
198:         __u32   delay_rts_before_send;  /* Delay before send (milliseconds) */
199:         __u32   delay_rts_after_send;   /* Delay after send (milliseconds) */
200:         __u32   padding[5];             /* Memory is cheap, new structs
201:                                            are a royal PITA .. */
202: };
203: 
204: #endif /* _LINUX_SERIAL_H */
205: 

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