mirror of
https://github.com/torvalds/linux.git
synced 2024-11-27 22:51:35 +00:00
6ab3d5624e
Signed-off-by: Jörn Engel <joern@wohnheim.fh-wedel.de> Signed-off-by: Adrian Bunk <bunk@stusta.de>
194 lines
6.1 KiB
C
194 lines
6.1 KiB
C
/* 68328serial.h: Definitions for the mc68328 serial driver.
|
|
*
|
|
* Copyright (C) 1995 David S. Miller <davem@caip.rutgers.edu>
|
|
* Copyright (C) 1998 Kenneth Albanowski <kjahds@kjahds.com>
|
|
* Copyright (C) 1998, 1999 D. Jeff Dionne <jeff@uclinux.org>
|
|
* Copyright (C) 1999 Vladimir Gurevich <vgurevic@cisco.com>
|
|
*
|
|
* VZ Support/Fixes Evan Stawnyczy <e@lineo.ca>
|
|
*/
|
|
|
|
#ifndef _MC683XX_SERIAL_H
|
|
#define _MC683XX_SERIAL_H
|
|
|
|
|
|
struct serial_struct {
|
|
int type;
|
|
int line;
|
|
int port;
|
|
int irq;
|
|
int flags;
|
|
int xmit_fifo_size;
|
|
int custom_divisor;
|
|
int baud_base;
|
|
unsigned short close_delay;
|
|
char reserved_char[2];
|
|
int hub6; /* FIXME: We don't have AT&T Hub6 boards! */
|
|
unsigned short closing_wait; /* time to wait before closing */
|
|
unsigned short closing_wait2; /* no longer used... */
|
|
int reserved[4];
|
|
};
|
|
|
|
/*
|
|
* For the close wait times, 0 means wait forever for serial port to
|
|
* flush its output. 65535 means don't wait at all.
|
|
*/
|
|
#define S_CLOSING_WAIT_INF 0
|
|
#define S_CLOSING_WAIT_NONE 65535
|
|
|
|
/*
|
|
* Definitions for S_struct (and serial_struct) flags field
|
|
*/
|
|
#define S_HUP_NOTIFY 0x0001 /* Notify getty on hangups and closes
|
|
on the callout port */
|
|
#define S_FOURPORT 0x0002 /* Set OU1, OUT2 per AST Fourport settings */
|
|
#define S_SAK 0x0004 /* Secure Attention Key (Orange book) */
|
|
#define S_SPLIT_TERMIOS 0x0008 /* Separate termios for dialin/callout */
|
|
|
|
#define S_SPD_MASK 0x0030
|
|
#define S_SPD_HI 0x0010 /* Use 56000 instead of 38400 bps */
|
|
|
|
#define S_SPD_VHI 0x0020 /* Use 115200 instead of 38400 bps */
|
|
#define S_SPD_CUST 0x0030 /* Use user-specified divisor */
|
|
|
|
#define S_SKIP_TEST 0x0040 /* Skip UART test during autoconfiguration */
|
|
#define S_AUTO_IRQ 0x0080 /* Do automatic IRQ during autoconfiguration */
|
|
#define S_SESSION_LOCKOUT 0x0100 /* Lock out cua opens based on session */
|
|
#define S_PGRP_LOCKOUT 0x0200 /* Lock out cua opens based on pgrp */
|
|
#define S_CALLOUT_NOHUP 0x0400 /* Don't do hangups for cua device */
|
|
|
|
#define S_FLAGS 0x0FFF /* Possible legal S flags */
|
|
#define S_USR_MASK 0x0430 /* Legal flags that non-privileged
|
|
* users can set or reset */
|
|
|
|
/* Internal flags used only by kernel/chr_drv/serial.c */
|
|
#define S_INITIALIZED 0x80000000 /* Serial port was initialized */
|
|
#define S_CALLOUT_ACTIVE 0x40000000 /* Call out device is active */
|
|
#define S_NORMAL_ACTIVE 0x20000000 /* Normal device is active */
|
|
#define S_BOOT_AUTOCONF 0x10000000 /* Autoconfigure port on bootup */
|
|
#define S_CLOSING 0x08000000 /* Serial port is closing */
|
|
#define S_CTS_FLOW 0x04000000 /* Do CTS flow control */
|
|
#define S_CHECK_CD 0x02000000 /* i.e., CLOCAL */
|
|
|
|
/* Software state per channel */
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
/*
|
|
* I believe this is the optimal setting that reduces the number of interrupts.
|
|
* At high speeds the output might become a little "bursted" (use USTCNT_TXHE
|
|
* if that bothers you), but in most cases it will not, since we try to
|
|
* transmit characters every time rs_interrupt is called. Thus, quite often
|
|
* you'll see that a receive interrupt occures before the transmit one.
|
|
* -- Vladimir Gurevich
|
|
*/
|
|
#define USTCNT_TX_INTR_MASK (USTCNT_TXEE)
|
|
|
|
/*
|
|
* 68328 and 68EZ328 UARTS are a little bit different. EZ328 has special
|
|
* "Old data interrupt" which occures whenever the data stay in the FIFO
|
|
* longer than 30 bits time. This allows us to use FIFO without compromising
|
|
* latency. '328 does not have this feature and without the real 328-based
|
|
* board I would assume that RXRE is the safest setting.
|
|
*
|
|
* For EZ328 I use RXHE (Half empty) interrupt to reduce the number of
|
|
* interrupts. RXFE (receive queue full) causes the system to lose data
|
|
* at least at 115200 baud
|
|
*
|
|
* If your board is busy doing other stuff, you might consider to use
|
|
* RXRE (data ready intrrupt) instead.
|
|
*
|
|
* The other option is to make these INTR masks run-time configurable, so
|
|
* that people can dynamically adapt them according to the current usage.
|
|
* -- Vladimir Gurevich
|
|
*/
|
|
|
|
/* (es) */
|
|
#if defined(CONFIG_M68EZ328) || defined(CONFIG_M68VZ328)
|
|
#define USTCNT_RX_INTR_MASK (USTCNT_RXHE | USTCNT_ODEN)
|
|
#elif defined(CONFIG_M68328)
|
|
#define USTCNT_RX_INTR_MASK (USTCNT_RXRE)
|
|
#else
|
|
#error Please, define the Rx interrupt events for your CPU
|
|
#endif
|
|
/* (/es) */
|
|
|
|
/*
|
|
* 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
|
|
*/
|
|
|
|
struct m68k_serial {
|
|
char soft_carrier; /* Use soft carrier on this channel */
|
|
char break_abort; /* Is serial console in, so process brk/abrt */
|
|
char is_cons; /* Is this our console. */
|
|
|
|
/* We need to know the current clock divisor
|
|
* to read the bps rate the chip has currently
|
|
* loaded.
|
|
*/
|
|
unsigned char clk_divisor; /* May be 1, 16, 32, or 64 */
|
|
int baud;
|
|
int magic;
|
|
int baud_base;
|
|
int port;
|
|
int irq;
|
|
int flags; /* defined in tty.h */
|
|
int type; /* UART type */
|
|
struct tty_struct *tty;
|
|
int read_status_mask;
|
|
int ignore_status_mask;
|
|
int timeout;
|
|
int xmit_fifo_size;
|
|
int custom_divisor;
|
|
int x_char; /* xon/xoff character */
|
|
int close_delay;
|
|
unsigned short closing_wait;
|
|
unsigned short closing_wait2;
|
|
unsigned long event;
|
|
unsigned long last_active;
|
|
int line;
|
|
int count; /* # of fd on device */
|
|
int blocked_open; /* # of blocked opens */
|
|
unsigned char *xmit_buf;
|
|
int xmit_head;
|
|
int xmit_tail;
|
|
int xmit_cnt;
|
|
struct work_struct tqueue;
|
|
struct work_struct tqueue_hangup;
|
|
wait_queue_head_t open_wait;
|
|
wait_queue_head_t close_wait;
|
|
};
|
|
|
|
|
|
#define SERIAL_MAGIC 0x5301
|
|
|
|
/*
|
|
* The size of the serial xmit buffer is 1 page, or 4096 bytes
|
|
*/
|
|
#define SERIAL_XMIT_SIZE 4096
|
|
|
|
/*
|
|
* Events are used to schedule things to happen at timer-interrupt
|
|
* time, instead of at rs interrupt time.
|
|
*/
|
|
#define RS_EVENT_WRITE_WAKEUP 0
|
|
|
|
/*
|
|
* Define the number of ports supported and their irqs.
|
|
*/
|
|
#ifndef CONFIG_68328_SERIAL_UART2
|
|
#define NR_PORTS 1
|
|
#define UART_IRQ_DEFNS {UART_IRQ_NUM}
|
|
#else
|
|
#define NR_PORTS 2
|
|
#define UART_IRQ_DEFNS {UART1_IRQ_NUM, UART2_IRQ_NUM}
|
|
#endif
|
|
|
|
#endif /* __KERNEL__ */
|
|
#endif /* !(_MC683XX_SERIAL_H) */
|