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Diffstat (limited to 'include/linux/serial.h')
| -rw-r--r-- | include/linux/serial.h | 188 |
1 files changed, 188 insertions, 0 deletions
diff --git a/include/linux/serial.h b/include/linux/serial.h new file mode 100644 index 00000000000..00145822fb7 --- /dev/null +++ b/include/linux/serial.h @@ -0,0 +1,188 @@ +/* + * include/linux/serial.h + * + * Copyright (C) 1992 by Theodore Ts'o. + * + * Redistribution of this file is permitted under the terms of the GNU + * Public License (GPL) + */ + +#ifndef _LINUX_SERIAL_H +#define _LINUX_SERIAL_H + +#ifdef __KERNEL__ +#include <asm/page.h> + +/* + * Counters of the input lines (CTS, DSR, RI, CD) interrupts + */ + +struct async_icount { + __u32 cts, dsr, rng, dcd, tx, rx; + __u32 frame, parity, overrun, brk; + __u32 buf_overrun; +}; + +/* + * The size of the serial xmit buffer is 1 page, or 4096 bytes + */ +#define SERIAL_XMIT_SIZE PAGE_SIZE + +#endif + +struct serial_struct { + int type; + int line; + unsigned int port; + int irq; + int flags; + int xmit_fifo_size; + int custom_divisor; + int baud_base; + unsigned short close_delay; + char io_type; + char reserved_char[1]; + int hub6; + unsigned short closing_wait; /* time to wait before closing */ + unsigned short closing_wait2; /* no longer used... */ + unsigned char *iomem_base; + unsigned short iomem_reg_shift; + unsigned int port_high; + unsigned long iomap_base; /* cookie passed into ioremap */ +}; + +/* + * For the close wait times, 0 means wait forever for serial port to + * flush its output. 65535 means don't wait at all. + */ +#define ASYNC_CLOSING_WAIT_INF 0 +#define ASYNC_CLOSING_WAIT_NONE 65535 + +/* + * These are the supported serial types. + */ +#define PORT_UNKNOWN 0 +#define PORT_8250 1 +#define PORT_16450 2 +#define PORT_16550 3 +#define PORT_16550A 4 +#define PORT_CIRRUS 5 /* usurped by cyclades.c */ +#define PORT_16650 6 +#define PORT_16650V2 7 +#define PORT_16750 8 +#define PORT_STARTECH 9 /* usurped by cyclades.c */ +#define PORT_16C950 10 /* Oxford Semiconductor */ +#define PORT_16654 11 +#define PORT_16850 12 +#define PORT_RSA 13 /* RSA-DV II/S card */ +#define PORT_MAX 13 + +#define SERIAL_IO_PORT 0 +#define SERIAL_IO_HUB6 1 +#define SERIAL_IO_MEM 2 + +struct serial_uart_config { + char *name; + int dfl_xmit_fifo_size; + int flags; +}; + +#define UART_CLEAR_FIFO 0x01 +#define UART_USE_FIFO 0x02 +#define UART_STARTECH 0x04 +#define UART_NATSEMI 0x08 + +/* + * Definitions for async_struct (and serial_struct) flags field + */ +#define ASYNC_HUP_NOTIFY 0x0001 /* Notify getty on hangups and closes + on the callout port */ +#define ASYNC_FOURPORT 0x0002 /* Set OU1, OUT2 per AST Fourport settings */ +#define ASYNC_SAK 0x0004 /* Secure Attention Key (Orange book) */ +#define ASYNC_SPLIT_TERMIOS 0x0008 /* Separate termios for dialin/callout */ + +#define ASYNC_SPD_MASK 0x1030 +#define ASYNC_SPD_HI 0x0010 /* Use 56000 instead of 38400 bps */ + +#define ASYNC_SPD_VHI 0x0020 /* Use 115200 instead of 38400 bps */ +#define ASYNC_SPD_CUST 0x0030 /* Use user-specified divisor */ + +#define ASYNC_SKIP_TEST 0x0040 /* Skip UART test during autoconfiguration */ +#define ASYNC_AUTO_IRQ 0x0080 /* Do automatic IRQ during autoconfiguration */ +#define ASYNC_SESSION_LOCKOUT 0x0100 /* Lock out cua opens based on session */ +#define ASYNC_PGRP_LOCKOUT 0x0200 /* Lock out cua opens based on pgrp */ +#define ASYNC_CALLOUT_NOHUP 0x0400 /* Don't do hangups for cua device */ + +#define ASYNC_HARDPPS_CD 0x0800 /* Call hardpps when CD goes high */ + +#define ASYNC_SPD_SHI 0x1000 /* Use 230400 instead of 38400 bps */ +#define ASYNC_SPD_WARP 0x1010 /* Use 460800 instead of 38400 bps */ + +#define ASYNC_LOW_LATENCY 0x2000 /* Request low latency behaviour */ + +#define ASYNC_BUGGY_UART 0x4000 /* This is a buggy UART, skip some safety + * checks. Note: can be dangerous! */ + +#define ASYNC_AUTOPROBE 0x8000 /* Port was autoprobed by PCI or PNP code */ + +#define ASYNC_FLAGS 0x7FFF /* Possible legal async flags */ +#define ASYNC_USR_MASK 0x3430 /* Legal flags that non-privileged + * users can set or reset */ + +/* Internal flags used only by kernel/chr_drv/serial.c */ +#define ASYNC_INITIALIZED 0x80000000 /* Serial port was initialized */ +#define ASYNC_NORMAL_ACTIVE 0x20000000 /* Normal device is active */ +#define ASYNC_BOOT_AUTOCONF 0x10000000 /* Autoconfigure port on bootup */ +#define ASYNC_CLOSING 0x08000000 /* Serial port is closing */ +#define ASYNC_CTS_FLOW 0x04000000 /* Do CTS flow control */ +#define ASYNC_CHECK_CD 0x02000000 /* i.e., CLOCAL */ +#define ASYNC_SHARE_IRQ 0x01000000 /* for multifunction cards + --- no longer used */ +#define ASYNC_CONS_FLOW 0x00800000 /* flow control for console */ + +#define ASYNC_BOOT_ONLYMCA 0x00400000 /* Probe only if MCA bus */ +#define ASYNC_INTERNAL_FLAGS 0xFFC00000 /* Internal flags */ + +/* + * Multiport serial configuration structure --- external structure + */ +struct serial_multiport_struct { + int irq; + 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; + int reserved[32]; +}; + +/* + * Serial input interrupt line counters -- external structure + * Four lines can interrupt: CTS, DSR, RI, DCD + */ +struct serial_icounter_struct { + int cts, dsr, rng, dcd; + int rx, tx; + int frame, overrun, parity, brk; + int buf_overrun; + int reserved[9]; +}; + + +#ifdef __KERNEL__ +/* Export to allow PCMCIA to use this - Dave Hinds */ +extern int register_serial(struct serial_struct *req); +extern void unregister_serial(int line); + +/* Allow architectures to override entries in serial8250_ports[] at run time: */ +struct uart_port; /* forward declaration */ +extern int early_serial_setup(struct uart_port *port); +extern int early_serial_console_init(char *options); +extern int serial8250_start_console(struct uart_port *port, char *options); + +#endif /* __KERNEL__ */ +#endif /* _LINUX_SERIAL_H */ |