patch-2.2.8 linux/include/asm-m68k/serial.h

• Lines: 519
• Date: Tue May 11 09:57:14 1999
• Orig file: v2.2.7/linux/include/asm-m68k/serial.h
• Orig date: Thu Nov 12 16:21:24 1998

diff -u --recursive --new-file v2.2.7/linux/include/asm-m68k/serial.h linux/include/asm-m68k/serial.h
@@ -1,448 +1,84 @@
 /*
- * include/linux/serial.h
+ * include/asm-m68k/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 _M68K_SERIAL_H
-#define _M68K_SERIAL_H
-
-
-/* m68k serial port types are numbered from 100 to avoid interference
- * with the PC types (1..4)
- */
-#define PORT_UNKNOWN	0
-#define PORT_8250	1
-#define PORT_16450	2
-#define PORT_16550	3
-#define PORT_16550A	4
-#define PORT_CIRRUS     5
-#define PORT_16650V2	7
-#define PORT_16750	8
-
-#define SER_SCC_NORM	100	/* standard SCC channel */
-#define	SER_SCC_DMA	101	/* SCC channel with DMA support */
-#define	SER_MFP_CTRL	102	/* standard MFP port with modem control signals */
-#define	SER_MFP_BARE	103	/* MFP port without modem controls */
-#define	SER_MIDI	104	/* Atari MIDI */
-#define	SER_AMIGA	105	/* Amiga built-in serial port */
-#define SER_IOEXT	106	/* Amiga GVP IO-Extender (16c552) */
-#define SER_MFC_III	107	/* Amiga BSC Multiface Card III (MC68681) */
-#define SER_WHIPPET	108	/* Amiga Hisoft Whippet PCMCIA (16c550B) */
-#define SER_SCC_MVME	109	/* MVME162/MVME172 ports */
-#define SER_SCC_MAC	110	/* Macintosh SCC channel */
-#define SER_HPDCA	111	/* HP DCA serial */
-#define SER_SCC_BVME	112	/* BVME6000 ports */
-
-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;
-	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 ASYNC_CLOSING_WAIT_INF	0
-#define ASYNC_CLOSING_WAIT_NONE	65535
-
-/* This function tables does the abstraction from the underlying
- * hardware:
+ * currently this seems usefull only for a Q40,
+ * its an almost exact copy of ../asm/alpha/serial.h 
  *
- *   init(): Initialize the port as necessary, set RTS and DTR and
- *      enable interrupts. It does not need to set the speed and other
- *      parameters, because change_speed() is called, too.
- *   deinit(): Stop and shutdown the port (e.g. disable interrupts, ...)
- *   enab_tx_int(): Enable or disable the Tx Buffer Empty interrupt
- *      independently from other interrupt sources. If the int is
- *      enabled, the transmitter should also be restarted, i.e. if there
- *      are any chars to be sent, they should be put into the Tx
- *      register. The real en/disabling of the interrupt may be a no-op
- *      if there is no way to do this or it is too complex. This Tx ints
- *      are just disabled to save some interrupts if the transmitter is
- *      stopped anyway. But the restarting must be implemented!
- *   check_custom_divisor(): Check the given custom divisor for legality
- *      and return 0 if OK, non-zero otherwise.
- *   change_speed(): Set port speed, character size, number of stop
- *      bits and parity from the termios structure. If the user wants
- *      to set the speed with a custom divisor, he is required to
- *      check the baud_base first!
- *   throttle(): Set or clear the RTS line according to 'status'.
- *   set_break(): Set or clear the 'Send a Break' flag.
- *   get_serial_info(): Fill in the baud_base and custom_divisor
- *      fields of a serial_struct. It may also modify other fields, if
- *      needed.
- *   get_modem_info(): Return the status of RTS, DTR, DCD, RI, DSR and CTS.
- *   set_modem_info(): Set the status of RTS and DTR according to
- *      'new_dtr' and 'new_rts', resp. 0 = clear, 1 = set, -1 = don't change
- *   ioctl(): Process any port-specific ioctl's. This pointer may be
- *      NULL, if the port has no own ioctl's.
- *   stop_receive(): Turn off the Rx part of the port, so no more characters
- *      will be received. This is called before shutting the port down.
- *   trans_empty(): Return !=0 if there are no more characters still to be
- *      sent out (Tx buffer register and FIFOs empty)
- *   check_open(): Is called before the port is opened. The driver can check
- *      if that's ok and return an error code, or keep track of the opening
- *      even before init() is called. Use deinit() for matching closing of the
- *      port.
- *
- */
-
-struct m68k_async_struct;
-
-typedef struct {
-	void (*init)( struct m68k_async_struct *info );
-	void (*deinit)( struct m68k_async_struct *info, int leave_dtr );
-	void (*enab_tx_int)( struct m68k_async_struct *info, int enab_flag );
-	int  (*check_custom_divisor)( struct m68k_async_struct *info, int baud_base,
-				     int divisor );
-	void (*change_speed)( struct m68k_async_struct *info );
-	void (*throttle)( struct m68k_async_struct *info, int status );
-	void (*set_break)( struct m68k_async_struct *info, int break_flag );
-	void (*get_serial_info)( struct m68k_async_struct *info,
-				struct serial_struct *retinfo );
-	unsigned int (*get_modem_info)( struct m68k_async_struct *info );
-	int  (*set_modem_info)( struct m68k_async_struct *info, int new_dtr,
-			       int new_rts );
-	int  (*ioctl)( struct tty_struct *tty, struct file *file,
-		      struct m68k_async_struct *info, unsigned int cmd,
-		      unsigned long arg );
-	void (*stop_receive)( struct m68k_async_struct *info );
-	int  (*trans_empty)( struct m68k_async_struct *info );
-	int  (*check_open)( struct m68k_async_struct *info, struct tty_struct *tty,
-			   struct file *file );
-} SERIALSWITCH;
-
-/*
- * Definitions for m68k_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_FLAGS	0x1FFF	/* Possible legal async flags */
-#define ASYNC_USR_MASK 0x1430	/* Legal flags that non-privileged
-				 * users can set or reset */
-
-/* Internal flags used only by drivers/char/m68kserial.c */
-#define ASYNC_INITIALIZED	0x80000000 /* Serial port was initialized */
-#define ASYNC_CALLOUT_ACTIVE	0x40000000 /* Call out device is active */
-#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_INTERNAL_FLAGS	0xFF000000 /* Internal flags */
-
-/*
- * 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];
-};
 
+#include <linux/config.h>
+#if 0
+#define rs_init serial_rs_init
+#define register_serial serial_register_serial
+#define unregister_serial serial_unregister_serial
+#endif
 
-#ifdef __KERNEL__
 /*
- * This is our internal structure for each serial port's state.
- * 
- * Many fields are paralleled by the structure used by the serial_struct
- * structure.
+ * This assumes you have a 1.8432 MHz clock for your UART.
  *
- * For definitions of the flags field, see tty.h
- */
-
-#include <linux/termios.h>
-#include <linux/tqueue.h>
-
-#include <linux/config.h>	/* for Mac SCC extensions */
-
-#ifdef CONFIG_MAC
-#define NUM_ZSREGS    16
-struct mac_zschannel {
-	volatile unsigned char *control;
-	volatile unsigned char *data;
-};
-struct m68k_async_private;
-#endif
-
-struct m68k_async_struct {
-	int			magic;
-	int			baud_base;
-	int			port;
-	int			irq;
-	int			flags; 		/* defined in tty.h */
-	int			hub6;		/* HUB6 plus one */
-	int			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;
-	int			IER; 	/* Interrupt Enable Register */
-	int			MCR; 	/* Modem control register */
-	int			MCR_noint; /* MCR with interrupts off */
-	unsigned long		event;
-	unsigned long		last_active;
-	int			line;
-	int			count;	    /* # of fd on device */
-	int			blocked_open; /* # of blocked opens */
-	long			session; /* Session of opening process */
-	long			pgrp; /* pgrp of opening process */
-	unsigned char 		*xmit_buf;
-	int			xmit_head;
-	int			xmit_tail;
-	int			xmit_cnt;
-	struct tq_struct	tqueue;
-	struct termios		normal_termios;
-	struct termios		callout_termios;
-	struct wait_queue	*open_wait;
-	struct wait_queue	*close_wait;
-	struct wait_queue	*delta_msr_wait;
-	struct async_icount	icount;	/* kernel counters for the 4 input interrupts */
-	struct m68k_async_struct	*next_port; /* For the linked list */
-	struct m68k_async_struct	*prev_port;
-	void			*board_base; /* board-base address for use with
-						boards carrying several UART's,
-						like some Amiga boards. */
-	unsigned short		nr_uarts;    /* UART-counter, that indicates
-						how many UART's there are on
-						the board.  If the board has a
-						IRQ-register, this can be used
-						to check if any of the uarts,
-						on the board has requested an
-						interrupt, instead of checking
-						IRQ-registers on all UART's */
-	SERIALSWITCH		*sw;		/* functions to manage this port */
-#ifdef CONFIG_MAC
-	struct m68k_async_private	*private;
+ * It'd be nice if someone built a serial card with a 24.576 MHz
+ * clock, since the 16550A is capable of handling a top speed of 1.5
+ * megabits/second; but this requires the faster clock.
+ */
+#define BASE_BAUD ( 1843200 / 16 )
+
+/* Standard COM flags (except for COM4, because of the 8514 problem) */
+#ifdef CONFIG_SERIAL_DETECT_IRQ
+#define STD_COM_FLAGS (ASYNC_BOOT_AUTOCONF | ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ)
+#define STD_COM4_FLAGS (ASYNC_BOOT_AUTOCONF | ASYNC_AUTO_IRQ)
+#else
+#define STD_COM_FLAGS (ASYNC_BOOT_AUTOCONF | ASYNC_SKIP_TEST)
+#define STD_COM4_FLAGS ASYNC_BOOT_AUTOCONF
 #endif
-};
-
-#ifdef CONFIG_MAC
-struct m68k_async_private {
-	struct m68k_async_info	*zs_next;	/* For IRQ servicing chain */
-	struct mac_zschannel	*zs_channel;	/* Channel registers */
-	struct mac_zschannel	*zs_chan_a;	/* A side registers */
-	unsigned char		read_reg_zero;
-
-	char			soft_carrier;	/* Use soft carrier on this */
-	char			break_abort;	/* console, process brk/abrt */
-	char			kgdb_channel;	/* Kgdb running on this channel */
-	char			is_cons;	/* Is this our console. */
-	unsigned char		tx_active;	/* character being xmitted */
-	unsigned char		tx_stopped;	/* output is suspended */
-
-	/* 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			zs_baud;
-
-	/* Current write register values */
-	unsigned char		curregs[NUM_ZSREGS];
-
-	/* Values we need to set next opportunity */
-	unsigned char		pendregs[NUM_ZSREGS];
-
-	char			change_needed;
-};
-#endif
-#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
-
-/* number of characters left in xmit buffer before we ask for more */
-#define WAKEUP_CHARS 256
-
-/* Export to allow PCMCIA to use this - Dave Hinds */
-extern int register_serial(struct serial_struct *req);
-extern void unregister_serial(int line);
-extern struct m68k_async_struct rs_table[];
-extern task_queue tq_serial;
-
 
-/*
- * This routine is used by the interrupt handler to schedule
- * processing in the software interrupt portion of the driver.
- */
-static __inline__ void rs_sched_event(struct m68k_async_struct *info, int event)
-{
-	info->event |= 1 << event;
-	queue_task(&info->tqueue, &tq_serial);
-	mark_bh(SERIAL_BH);
-}
-
-static __inline__ void rs_receive_char( struct m68k_async_struct *info,
-					    int ch, int err )
-{
-	struct tty_struct *tty = info->tty;
-	
-	if (tty->flip.count >= TTY_FLIPBUF_SIZE)
-		return;
-	tty->flip.count++;
-	switch(err) {
-	case TTY_BREAK:
-		info->icount.brk++;
-		if (info->flags & ASYNC_SAK)
-			do_SAK(tty);
-		break;
-	case TTY_PARITY:
-		info->icount.parity++;
-		break;
-	case TTY_OVERRUN:
-		info->icount.overrun++;
-		break;
-	case TTY_FRAME:
-		info->icount.frame++;
-		break;
-	}
-	*tty->flip.flag_buf_ptr++ = err;
-	*tty->flip.char_buf_ptr++ = ch;
-	info->icount.rx++;
-	tty_flip_buffer_push(tty);
-}
-
-static __inline__ int rs_get_tx_char( struct m68k_async_struct *info )
-{
-	unsigned char ch;
-	
-	if (info->x_char) {
-		ch = info->x_char;
-		info->icount.tx++;
-		info->x_char = 0;
-		return( ch );
-	}
-
-	if (info->xmit_cnt <= 0 || info->tty->stopped || info->tty->hw_stopped)
-		return( -1 );
-
-	ch = info->xmit_buf[info->xmit_tail++];
-	info->xmit_tail &= SERIAL_XMIT_SIZE - 1;
-	info->icount.tx++;
-	if (--info->xmit_cnt < WAKEUP_CHARS)
-		rs_sched_event(info, RS_EVENT_WRITE_WAKEUP);
-	return( ch );
-}
-
-static __inline__ int rs_no_more_tx( struct m68k_async_struct *info )
-{
-	return( info->xmit_cnt <= 0 ||
-			info->tty->stopped ||
-			info->tty->hw_stopped );
-}
-
-static __inline__ void rs_dcd_changed( struct m68k_async_struct *info, int dcd )
-
-{
-	/* update input line counter */
-	info->icount.dcd++;
-	wake_up_interruptible(&info->delta_msr_wait);
-
-	if (info->flags & ASYNC_CHECK_CD) {
-#if (defined(SERIAL_DEBUG_OPEN) || defined(SERIAL_DEBUG_INTR))
-		printk("ttyS%d CD now %s...", info->line,
-		       dcd ? "on" : "off");
-#endif		
-		if (dcd) {
-			wake_up_interruptible(&info->open_wait);
-		} else if (!((info->flags & ASYNC_CALLOUT_ACTIVE) &&
-			     (info->flags & ASYNC_CALLOUT_NOHUP))) {
-#ifdef SERIAL_DEBUG_OPEN
-			printk("scheduling hangup...");
+#ifdef CONFIG_SERIAL_MANY_PORTS
+#define FOURPORT_FLAGS ASYNC_FOURPORT
+#define ACCENT_FLAGS 0
+#define BOCA_FLAGS 0
 #endif
-			if (info->tty)
-				tty_hangup(info->tty);
-		}
-	}
-}
-
-
-void rs_stop( struct tty_struct *tty );
-void rs_start( struct tty_struct *tty );
-
-static __inline__ void rs_check_cts( struct m68k_async_struct *info, int cts )
-{
-	/* update input line counter */
-	info->icount.cts++;
-	wake_up_interruptible(&info->delta_msr_wait);
 	
-	if ((info->flags & ASYNC_CTS_FLOW) && info->tty) {
-		if (info->tty->hw_stopped) {
-			if (cts) {
-#if (defined(SERIAL_DEBUG_INTR) || defined(SERIAL_DEBUG_FLOW))
-				printk("CTS tx start...");
+#define STD_SERIAL_PORT_DEFNS			\
+	/* UART CLK   PORT IRQ     FLAGS        */			\
+	{ 0, BASE_BAUD, 0x3F8, 4, STD_COM_FLAGS },	/* ttyS0 */	\
+	{ 0, BASE_BAUD, 0x2F8, 3, STD_COM_FLAGS },	/* ttyS1 */	\
+	{ 0, BASE_BAUD, 0x3E8, 4, STD_COM_FLAGS },	/* ttyS2 */	\
+	{ 0, BASE_BAUD, 0x2E8, 3, STD_COM4_FLAGS },	/* ttyS3 */
+
+
+#ifdef CONFIG_SERIAL_MANY_PORTS
+#define EXTRA_SERIAL_PORT_DEFNS			\
+	{ 0, BASE_BAUD, 0x1A0, 9, FOURPORT_FLAGS }, 	/* ttyS4 */	\
+	{ 0, BASE_BAUD, 0x1A8, 9, FOURPORT_FLAGS },	/* ttyS5 */	\
+	{ 0, BASE_BAUD, 0x1B0, 9, FOURPORT_FLAGS },	/* ttyS6 */	\
+	{ 0, BASE_BAUD, 0x1B8, 9, FOURPORT_FLAGS },	/* ttyS7 */	\
+	{ 0, BASE_BAUD, 0x2A0, 5, FOURPORT_FLAGS },	/* ttyS8 */	\
+	{ 0, BASE_BAUD, 0x2A8, 5, FOURPORT_FLAGS },	/* ttyS9 */	\
+	{ 0, BASE_BAUD, 0x2B0, 5, FOURPORT_FLAGS },	/* ttyS10 */	\
+	{ 0, BASE_BAUD, 0x2B8, 5, FOURPORT_FLAGS },	/* ttyS11 */	\
+	{ 0, BASE_BAUD, 0x330, 4, ACCENT_FLAGS },	/* ttyS12 */	\
+	{ 0, BASE_BAUD, 0x338, 4, ACCENT_FLAGS },	/* ttyS13 */	\
+	{ 0, BASE_BAUD, 0x000, 0, 0 },	/* ttyS14 (spare) */		\
+	{ 0, BASE_BAUD, 0x000, 0, 0 },	/* ttyS15 (spare) */		\
+	{ 0, BASE_BAUD, 0x100, 12, BOCA_FLAGS },	/* ttyS16 */	\
+	{ 0, BASE_BAUD, 0x108, 12, BOCA_FLAGS },	/* ttyS17 */	\
+	{ 0, BASE_BAUD, 0x110, 12, BOCA_FLAGS },	/* ttyS18 */	\
+	{ 0, BASE_BAUD, 0x118, 12, BOCA_FLAGS },	/* ttyS19 */	\
+	{ 0, BASE_BAUD, 0x120, 12, BOCA_FLAGS },	/* ttyS20 */	\
+	{ 0, BASE_BAUD, 0x128, 12, BOCA_FLAGS },	/* ttyS21 */	\
+	{ 0, BASE_BAUD, 0x130, 12, BOCA_FLAGS },	/* ttyS22 */	\
+	{ 0, BASE_BAUD, 0x138, 12, BOCA_FLAGS },	/* ttyS23 */	\
+	{ 0, BASE_BAUD, 0x140, 12, BOCA_FLAGS },	/* ttyS24 */	\
+	{ 0, BASE_BAUD, 0x148, 12, BOCA_FLAGS },	/* ttyS25 */	\
+	{ 0, BASE_BAUD, 0x150, 12, BOCA_FLAGS },	/* ttyS26 */	\
+	{ 0, BASE_BAUD, 0x158, 12, BOCA_FLAGS },	/* ttyS27 */	\
+	{ 0, BASE_BAUD, 0x160, 12, BOCA_FLAGS },	/* ttyS28 */	\
+	{ 0, BASE_BAUD, 0x168, 12, BOCA_FLAGS },	/* ttyS29 */	\
+	{ 0, BASE_BAUD, 0x170, 12, BOCA_FLAGS },	/* ttyS30 */	\
+	{ 0, BASE_BAUD, 0x178, 12, BOCA_FLAGS },	/* ttyS31 */
+#else
+#define EXTRA_SERIAL_PORT_DEFNS
 #endif
-				info->tty->hw_stopped = 0;
-				rs_start( info->tty );
-				rs_sched_event(info, RS_EVENT_WRITE_WAKEUP);
-				return;
-			}
-		} else {
-			if (!cts) {
-				info->tty->hw_stopped = 1;
-				rs_stop( info->tty );
-			}
-		}
-	}
-}
-
-
-#endif /* __KERNEL__ */
 
-#endif /* _M68K_SERIAL_H */
+#define SERIAL_PORT_DFNS		\
+	STD_SERIAL_PORT_DEFNS		\
+	EXTRA_SERIAL_PORT_DEFNS