patch-2.4.22 linux-2.4.22/arch/mips/baget/vacserial.c

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diff -urN linux-2.4.21/arch/mips/baget/vacserial.c linux-2.4.22/arch/mips/baget/vacserial.c
@@ -1,2905 +0,0 @@
-/*
- * vacserial.c: VAC UART serial driver
- *              This code stealed and adopted from linux/drivers/char/serial.c
- *              See that for author info
- *
- * Copyright (C) 1998 Gleb Raiko & Vladimir Roganov
- */
-
-#undef  SERIAL_PARANOIA_CHECK
-#define CONFIG_SERIAL_NOPAUSE_IO
-#define SERIAL_DO_RESTART
-
-#define CONFIG_SERIAL_SHARE_IRQ
-
-/* Set of debugging defines */
-
-#undef  SERIAL_DEBUG_INTR
-#undef  SERIAL_DEBUG_OPEN
-#undef  SERIAL_DEBUG_FLOW
-#undef  SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
-
-#define RS_STROBE_TIME (10*HZ)
-#define RS_ISR_PASS_LIMIT  2 /* Beget is not a super-computer (old=256) */
-
-#define IRQ_T(state) \
- ((state->flags & ASYNC_SHARE_IRQ) ? SA_SHIRQ : SA_INTERRUPT)
-
-#define SERIAL_INLINE
-  
-#if defined(MODULE) && defined(SERIAL_DEBUG_MCOUNT)
-#define DBG_CNT(s) baget_printk("(%s):[%x] refc=%d, serc=%d, ttyc=%d-> %s\n", \
-  kdevname(tty->device),(info->flags),serial_refcount,info->count,tty->count,s)
-#else
-#define DBG_CNT(s)
-#endif
-
-#define  QUAD_UART_SPEED  /* Useful for Baget */
-
-/*
- * End of serial driver configuration section.
- */
-
-#include <linux/config.h>
-#include <linux/module.h>
-#include <linux/errno.h>
-#include <linux/signal.h>
-#include <linux/sched.h>
-#include <linux/timer.h>
-#include <linux/interrupt.h>
-#include <linux/tty.h>
-#include <linux/tty_flip.h>
-#include <linux/serial.h>
-#include <linux/major.h>
-#include <linux/string.h>
-#include <linux/fcntl.h>
-#include <linux/ptrace.h>
-#include <linux/ioport.h>
-#include <linux/mm.h>
-#include <linux/slab.h>
-#include <linux/init.h>
-#include <linux/delay.h>
-#ifdef CONFIG_SERIAL_CONSOLE
-#include <linux/console.h>
-#endif
-
-#include <asm/system.h>
-#include <asm/io.h>
-#include <asm/irq.h>
-#include <asm/uaccess.h>
-#include <asm/bitops.h>
-#include <asm/serial.h>
-#include <asm/baget/baget.h>
-
-#define BAGET_VAC_UART_IRQ 0x35
-
-/*
- *  Implementation note:
- *  It was descovered by means of advanced electronic tools,
- *  if the driver works via TX_READY interrupts then VIC generates
- *  strange self-eliminating traps. Thus, the driver is rewritten to work
- *  via TX_EMPTY
- */
-
-/* VAC-specific check/debug switches */
-
-#undef CHECK_REG_INDEX
-#undef DEBUG_IO_PORT_A
-
-#ifdef SERIAL_INLINE
-#define _INLINE_ inline
-#endif
-	
-static char *serial_name = "VAC Serial driver";
-static char *serial_version = "4.26";
-
-static DECLARE_TASK_QUEUE(tq_serial);
-
-static struct tty_driver serial_driver, callout_driver;
-static int serial_refcount;
-
-/* number of characters left in xmit buffer before we ask for more */
-#define WAKEUP_CHARS 256
- 
-/*
- * IRQ_timeout		- How long the timeout should be for each IRQ
- * 				should be after the IRQ has been active.
- */
-
-static struct async_struct *IRQ_ports[NR_IRQS];
-static int IRQ_timeout[NR_IRQS];
-#ifdef CONFIG_SERIAL_CONSOLE
-static struct console sercons;
-#endif
-
-static void autoconfig(struct serial_state * info);
-static void change_speed(struct async_struct *info);
-static void rs_wait_until_sent(struct tty_struct *tty, int timeout);
-static void rs_timer(unsigned long dummy);
-
-static struct timer_list vacs_timer;
-
-/*
- * Here we define the default xmit fifo size used for each type of
- * UART
- */
-static struct serial_uart_config uart_config[] = {
-        { "unknown",  1, 0 },  /* Must go first  --  used as unasigned */
-        { "VAC UART", 1, 0 }
-}; 
-#define VAC_UART_TYPE 1   /* Just index in above array */
-
-static struct serial_state rs_table[] = {
-/*
- * VAC has tricky layout for pair of his SIO registers,
- *  so we need special function to access ones.
- *  To identify port we use their TX offset
- */
-        { 0, 9600, VAC_UART_B_TX, BAGET_VAC_UART_IRQ, 
-          STD_COM_FLAGS }, /* VAC UART B */
-        { 0, 9600, VAC_UART_A_TX, BAGET_VAC_UART_IRQ, 
-          STD_COM_FLAGS }  /* VAC UART A */
-};
-
-#define NR_PORTS	(sizeof(rs_table)/sizeof(struct serial_state))
-
-static struct tty_struct *serial_table[NR_PORTS];
-static struct termios *serial_termios[NR_PORTS];
-static struct termios *serial_termios_locked[NR_PORTS];
-
-#ifndef MIN
-#define MIN(a,b)	((a) < (b) ? (a) : (b))
-#endif
-
-/*
- * tmp_buf is used as a temporary buffer by serial_write.  We need to
- * lock it in case the copy_from_user blocks while swapping in a page,
- * and some other program tries to do a serial write at the same time.
- * Since the lock will only come under contention when the system is
- * swapping and available memory is low, it makes sense to share one
- * buffer across all the serial ports, since it significantly saves
- * memory if large numbers of serial ports are open.
- */
-static unsigned char *tmp_buf;
-static DECLARE_MUTEX(tmp_buf_sem);
-
-static inline int serial_paranoia_check(struct async_struct *info,
-					kdev_t device, const char *routine)
-{
-#ifdef SERIAL_PARANOIA_CHECK
-	static const char *badmagic =
-		"Warning: bad magic number for serial struct (%s) in %s\n";
-	static const char *badinfo =
-		"Warning: null async_struct for (%s) in %s\n";
-
-	if (!info) {
-		printk(badinfo, kdevname(device), routine);
-		return 1;
-	}
-	if (info->magic != SERIAL_MAGIC) {
-		printk(badmagic, kdevname(device), routine);
-		return 1;
-	}
-#endif
-	return 0;
-}
-
-/*
-  To unify UART A/B access we will use following function 
-  to compute register offsets by register index.
- */
-
-#define VAC_UART_MODE       0
-#define VAC_UART_TX         1
-#define VAC_UART_RX         2
-#define VAC_UART_INT_MASK   3
-#define VAC_UART_INT_STATUS 4
-
-#define VAC_UART_REG_NR     5
-
-static inline int uart_offset_map(unsigned long port, int reg_index) 
-{
-	static const unsigned int ind_to_reg[VAC_UART_REG_NR][NR_PORTS] = {
-		{ VAC_UART_B_MODE,       VAC_UART_A_MODE       },
-		{ VAC_UART_B_TX,         VAC_UART_A_TX         },
-		{ VAC_UART_B_RX,         VAC_UART_A_RX         },
-		{ VAC_UART_B_INT_MASK,   VAC_UART_A_INT_MASK   },
-		{ VAC_UART_B_INT_STATUS, VAC_UART_A_INT_STATUS }
-	};
-#ifdef CHECK_REG_INDEX
-	if (reg_index > VAC_UART_REG_NR) panic("vacserial: bad reg_index");
-#endif
-        return ind_to_reg[reg_index][port == VAC_UART_B_TX ? 0 : 1];
-}
-
-static inline unsigned int serial_inw(struct async_struct *info, int offset)
-{
-	int val = vac_inw(uart_offset_map(info->port,offset));
-#ifdef DEBUG_IO_PORT_A
-	if (info->port == VAC_UART_A_TX)
-		printk("UART_A_IN: reg = 0x%04x, val = 0x%04x\n", 
-		       uart_offset_map(info->port,offset), val);
-#endif
-	return val;
-}
-
-static inline unsigned int serial_inp(struct async_struct *info, int offset)
-{
-	return serial_inw(info, offset);
-}
-
-static inline unsigned int serial_in(struct async_struct *info, int offset)
-{
-	return serial_inw(info, offset);
-}
-
-static inline void serial_outw(struct async_struct *info,int offset, int value)
-{
-#ifdef DEBUG_IO_PORT_A
-	if (info->port == VAC_UART_A_TX)
-		printk("UART_A_OUT: offset = 0x%04x, val = 0x%04x\n", 
-		       uart_offset_map(info->port,offset), value);
-#endif
-	vac_outw(value, uart_offset_map(info->port,offset));
-}
-
-static inline void serial_outp(struct async_struct *info,int offset, int value)
-{
-	serial_outw(info,offset,value);
-}
-
-static inline void serial_out(struct async_struct *info,int offset, int value)
-{
-	serial_outw(info,offset,value);
-}
-
-/*
- * ------------------------------------------------------------
- * rs_stop() and rs_start()
- *
- * This routines are called before setting or resetting tty->stopped.
- * They enable or disable transmitter interrupts, as necessary.
- * ------------------------------------------------------------
- */
-static void rs_stop(struct tty_struct *tty)
-{
-	struct async_struct *info = (struct async_struct *)tty->driver_data;
-	unsigned long flags;
-
-	if (serial_paranoia_check(info, tty->device, "rs_stop"))
-		return;
-	
-	save_flags(flags); cli();
-        if (info->IER & VAC_UART_INT_TX_EMPTY) {
-                info->IER &= ~VAC_UART_INT_TX_EMPTY;
-		serial_out(info, VAC_UART_INT_MASK, info->IER);
-	}
-	restore_flags(flags);
-}
-
-static void rs_start(struct tty_struct *tty)
-{
-	struct async_struct *info = (struct async_struct *)tty->driver_data;
-	unsigned long flags;
-	
-	if (serial_paranoia_check(info, tty->device, "rs_start"))
-		return;
-	
-	save_flags(flags); cli();
-	if (info->xmit_cnt && info->xmit_buf 
-            && !(info->IER & VAC_UART_INT_TX_EMPTY)) {
-                info->IER |= VAC_UART_INT_TX_EMPTY;
-		serial_out(info, VAC_UART_INT_MASK, info->IER);
-	}
-	restore_flags(flags);
-}
-
-/*
- * ----------------------------------------------------------------------
- *
- * Here starts the interrupt handling routines.  All of the following
- * subroutines are declared as inline and are folded into
- * rs_interrupt().  They were separated out for readability's sake.
- *
- * Note: rs_interrupt() is a "fast" interrupt, which means that it
- * runs with interrupts turned off.  People who may want to modify
- * rs_interrupt() should try to keep the interrupt handler as fast as
- * possible.  After you are done making modifications, it is not a bad
- * idea to do:
- * 
- * gcc -S -DKERNEL -Wall -Wstrict-prototypes -O6 -fomit-frame-pointer serial.c
- *
- * and look at the resulting assemble code in serial.s.
- *
- * 				- Ted Ts'o (tytso@mit.edu), 7-Mar-93
- * -----------------------------------------------------------------------
- */
-
-/*
- * 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 async_struct *info,
-				  int event)
-{
-	info->event |= 1 << event;
-	queue_task(&info->tqueue, &tq_serial);
-	mark_bh(SERIAL_BH);
-}
-
-static _INLINE_ void receive_chars(struct async_struct *info,
-				   int *status)
-{
-	struct tty_struct *tty = info->tty;
-	unsigned short rx;
-	unsigned char ch;
-	int ignored = 0;
-	struct	async_icount *icount;
-
-	icount = &info->state->icount;
-	do {
-		rx = serial_inw(info, VAC_UART_RX);
-		ch = VAC_UART_RX_DATA_MASK & rx;
-
-		if (tty->flip.count >= TTY_FLIPBUF_SIZE)
-			break;
-		*tty->flip.char_buf_ptr = ch;
-		icount->rx++;
-		
-#ifdef SERIAL_DEBUG_INTR
-		baget_printk("DR%02x:%02x...", rx, *status);
-#endif
-		*tty->flip.flag_buf_ptr = 0;
-		if (*status & (VAC_UART_STATUS_RX_BREAK_CHANGE 
-			       | VAC_UART_STATUS_RX_ERR_PARITY 
-			       | VAC_UART_STATUS_RX_ERR_FRAME 
-			       | VAC_UART_STATUS_RX_ERR_OVERRUN)) {
-			/*
-			 * For statistics only
-			 */
-			if (*status & VAC_UART_STATUS_RX_BREAK_CHANGE) {
-				*status &= ~(VAC_UART_STATUS_RX_ERR_FRAME 
-					     | VAC_UART_STATUS_RX_ERR_PARITY);
-				icount->brk++;
-			} else if (*status & VAC_UART_STATUS_RX_ERR_PARITY)
-				icount->parity++;
-			else if (*status & VAC_UART_STATUS_RX_ERR_FRAME)
-				icount->frame++;
-			if (*status & VAC_UART_STATUS_RX_ERR_OVERRUN)
-				icount->overrun++;
-
-			/*
-			 * Now check to see if character should be
-			 * ignored, and mask off conditions which
-			 * should be ignored.
-			 */
-			if (*status & info->ignore_status_mask) {
-				if (++ignored > 100)
-					break;
-				goto ignore_char;
-			}
-			*status &= info->read_status_mask;
-		
-			if (*status & (VAC_UART_STATUS_RX_BREAK_CHANGE)) {
-#ifdef SERIAL_DEBUG_INTR
-				baget_printk("handling break....");
-#endif
-				*tty->flip.flag_buf_ptr = TTY_BREAK;
-				if (info->flags & ASYNC_SAK)
-					do_SAK(tty);
-			} else if (*status & VAC_UART_STATUS_RX_ERR_PARITY)
-				*tty->flip.flag_buf_ptr = TTY_PARITY;
-			else if (*status & VAC_UART_STATUS_RX_ERR_FRAME)
-				*tty->flip.flag_buf_ptr = TTY_FRAME;
-			if (*status & VAC_UART_STATUS_RX_ERR_OVERRUN) {
-				/*
-				 * Overrun is special, since it's
-				 * reported immediately, and doesn't
-				 * affect the current character
-				 */
-				if (tty->flip.count < TTY_FLIPBUF_SIZE) {
-					tty->flip.count++;
-					tty->flip.flag_buf_ptr++;
-					tty->flip.char_buf_ptr++;
-					*tty->flip.flag_buf_ptr = TTY_OVERRUN;
-				}
-			}
-		}
-		tty->flip.flag_buf_ptr++;
-		tty->flip.char_buf_ptr++;
-		tty->flip.count++;
-	ignore_char:
-		*status = serial_inw(info, VAC_UART_INT_STATUS);
-	} while ((*status & VAC_UART_STATUS_RX_READY));
-	tty_flip_buffer_push(tty);
-}
-
-static _INLINE_ void transmit_chars(struct async_struct *info, int *intr_done)
-{
-	int count;
-	
-	if (info->x_char) {
-		serial_outw(info, VAC_UART_TX, 
-			    (((unsigned short)info->x_char)<<8));
-		info->state->icount.tx++;
-		info->x_char = 0;
-		if (intr_done)
-			*intr_done = 0;
-		return;
-	}
-	if ((info->xmit_cnt <= 0) || info->tty->stopped ||
-	    info->tty->hw_stopped) {
-                info->IER &= ~VAC_UART_INT_TX_EMPTY;
-		serial_outw(info, VAC_UART_INT_MASK, info->IER);
-		return;
-	}
-	count = info->xmit_fifo_size;
-	do {
-		serial_out(info, VAC_UART_TX, 
-			   (unsigned short)info->xmit_buf[info->xmit_tail++] \
-			   << 8);
-		info->xmit_tail = info->xmit_tail & (SERIAL_XMIT_SIZE-1);
-		info->state->icount.tx++;
-		if (--info->xmit_cnt <= 0)
-			break;
-	} while (--count > 0);
-	
-	if (info->xmit_cnt < WAKEUP_CHARS)
-		rs_sched_event(info, RS_EVENT_WRITE_WAKEUP);
-
-#ifdef SERIAL_DEBUG_INTR
-	baget_printk("THRE...");
-#endif
-	if (intr_done)
-		*intr_done = 0;
-
-	if (info->xmit_cnt <= 0) {
-                info->IER &= ~VAC_UART_INT_TX_EMPTY;
-		serial_outw(info, VAC_UART_INT_MASK, info->IER);
-	}
-}
-
-static _INLINE_ void check_modem_status(struct async_struct *info)
-{
-#if 0 /* VAC hasn't modem control */
-	wake_up_interruptible(&info->open_wait);
-	rs_sched_event(info, RS_EVENT_WRITE_WAKEUP); 
-#endif
-}
-
-#ifdef CONFIG_SERIAL_SHARE_IRQ
-
-
-/*
- *  Specific functions needed for VAC UART interrupt enter/leave
- */
-
-#define VAC_INT_CTRL_UART_ENABLE  \
-   (VAC_INT_CTRL_TIMER_PIO10|VAC_INT_CTRL_UART_B_PIO7|VAC_INT_CTRL_UART_A_PIO7)
-
-#define VAC_INT_CTRL_UART_DISABLE(info) \
-   (VAC_INT_CTRL_TIMER_PIO10 | \
-    ((info->port == VAC_UART_A_TX) ? \
-     (VAC_INT_CTRL_UART_A_DISABLE|VAC_INT_CTRL_UART_B_PIO7) : \
-     (VAC_INT_CTRL_UART_A_PIO7|VAC_INT_CTRL_UART_B_DISABLE)))
-
-/*
- *  Following two functions were proposed by Pavel Osipenko 
- *  to make VAC/VIC behaviour more regular.
- */
-static void intr_begin(struct async_struct* info) 
-{
-	serial_outw(info, VAC_UART_INT_MASK, 0);
-}
-
-static void intr_end(struct async_struct* info)
-{
-	vac_outw(VAC_INT_CTRL_UART_DISABLE(info), VAC_INT_CTRL);
-	vac_outw(VAC_INT_CTRL_UART_ENABLE,        VAC_INT_CTRL); 
-
-	serial_outw(info, VAC_UART_INT_MASK, info->IER);
-}
-
-/*
- * This is the serial driver's generic interrupt routine
- */
-static void rs_interrupt(int irq, void *dev_id, struct pt_regs * regs)
-{
-	int status;
-	struct async_struct * info;
-	int pass_counter = 0;
-	struct async_struct *end_mark = 0;
-
-#ifdef SERIAL_DEBUG_INTR
-	baget_printk("rs_interrupt(%d)...", irq);
-#endif
-
-	info = IRQ_ports[irq];
-	if (!info)
-		return;
-
-	do {
-	        intr_begin(info);  /* Mark we begin port handling */
-
-		if (!info->tty ||
-		     (serial_inw (info, VAC_UART_INT_STATUS) 
-		      & VAC_UART_STATUS_INTS) == 0) 
-		    {
-			if (!end_mark)
-				end_mark = info;
-			goto next;
-		    }
-		end_mark = 0;
-
-		info->last_active = jiffies;
-
-		status = serial_inw(info, VAC_UART_INT_STATUS);
-#ifdef SERIAL_DEBUG_INTR
-		baget_printk("status = %x...", status);
-#endif
-		if (status & VAC_UART_STATUS_RX_READY) {
-			receive_chars(info, &status);
-		}
-		check_modem_status(info);
-                if (status & VAC_UART_STATUS_TX_EMPTY)
-			transmit_chars(info, 0);
-
-	next:
-		intr_end(info);   /* Mark this port handled */
-
-		info = info->next_port;
-		if (!info) {
-			info = IRQ_ports[irq];
-			if (pass_counter++ > RS_ISR_PASS_LIMIT) {
-				break; 	/* Prevent infinite loops */
-			}
-			continue;
-		}
-	} while (end_mark != info);
-#ifdef SERIAL_DEBUG_INTR
-	baget_printk("end.\n");
-#endif
-
-
-}
-#endif /* #ifdef CONFIG_SERIAL_SHARE_IRQ */
-
-
-/* The original driver was simplified here: 
-   two functions were joined to reduce code */
-
-#define rs_interrupt_single rs_interrupt
-
-
-/*
- * -------------------------------------------------------------------
- * Here ends the serial interrupt routines.
- * -------------------------------------------------------------------
- */
-
-/*
- * This routine is used to handle the "bottom half" processing for the
- * serial driver, known also the "software interrupt" processing.
- * This processing is done at the kernel interrupt level, after the
- * rs_interrupt() has returned, BUT WITH INTERRUPTS TURNED ON.  This
- * is where time-consuming activities which can not be done in the
- * interrupt driver proper are done; the interrupt driver schedules
- * them using rs_sched_event(), and they get done here.
- */
-static void do_serial_bh(void)
-{
-	run_task_queue(&tq_serial);
-}
-
-static void do_softint(void *private_)
-{
-	struct async_struct	*info = (struct async_struct *) private_;
-	struct tty_struct	*tty;
-	
-	tty = info->tty;
-	if (!tty)
-		return;
-
-	if (test_and_clear_bit(RS_EVENT_WRITE_WAKEUP, &info->event)) {
-		if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) &&
-		    tty->ldisc.write_wakeup)
-			(tty->ldisc.write_wakeup)(tty);
-		wake_up_interruptible(&tty->write_wait);
-	}
-}
-
-/*
- * ---------------------------------------------------------------
- * Low level utility subroutines for the serial driver:  routines to
- * figure out the appropriate timeout for an interrupt chain, routines
- * to initialize and startup a serial port, and routines to shutdown a
- * serial port.  Useful stuff like that.
- * ---------------------------------------------------------------
- */
-
-/*
- * This routine figures out the correct timeout for a particular IRQ.
- * It uses the smallest timeout of all of the serial ports in a
- * particular interrupt chain.  Now only used for IRQ 0....
- */
-static void figure_IRQ_timeout(int irq)
-{
-	struct	async_struct	*info;
-	int	timeout = 60*HZ;	/* 60 seconds === a long time :-) */
-
-	info = IRQ_ports[irq];
-	if (!info) {
-		IRQ_timeout[irq] = 60*HZ;
-		return;
-	}
-	while (info) {
-		if (info->timeout < timeout)
-			timeout = info->timeout;
-		info = info->next_port;
-	}
-	if (!irq)
-		timeout = timeout / 2;
-	IRQ_timeout[irq] = timeout ? timeout : 1;
-}
-
-static int startup(struct async_struct * info)
-{
-	unsigned long flags;
-	int	retval=0;
-	void (*handler)(int, void *, struct pt_regs *);
-	struct serial_state *state= info->state;
-	unsigned long page;
-
-	page = get_free_page(GFP_KERNEL);
-	if (!page)
-		return -ENOMEM;
-
-	save_flags(flags); cli();
-
-	if (info->flags & ASYNC_INITIALIZED) {
-		free_page(page);
-		goto errout;
-	}
-	if (!state->port || !state->type) {
-		if (info->tty)
-			set_bit(TTY_IO_ERROR, &info->tty->flags);
-		free_page(page);
-		goto errout;
-	}
-	if (info->xmit_buf)
-		free_page(page);
-	else
-		info->xmit_buf = (unsigned char *) page;
-
-#ifdef SERIAL_DEBUG_OPEN
-	baget_printk("starting up ttys%d (irq %d)...", info->line, state->irq);
-#endif
-
-	if (uart_config[info->state->type].flags & UART_STARTECH) {
-		/* Wake up UART */
-		serial_outp(info, VAC_UART_MODE, 0);
-		serial_outp(info, VAC_UART_INT_MASK, 0);
-	}
-
-	/*
-	 * Allocate the IRQ if necessary
-	 */
-	if (state->irq && (!IRQ_ports[state->irq] ||
-			  !IRQ_ports[state->irq]->next_port)) {
-
-		if (IRQ_ports[state->irq]) {
-#ifdef CONFIG_SERIAL_SHARE_IRQ
-			free_irq(state->irq, NULL);
-				handler = rs_interrupt;
-#else
-			retval = -EBUSY;
-			goto errout;
-#endif /* CONFIG_SERIAL_SHARE_IRQ */
-		} else 
-			handler = rs_interrupt_single;
-
-
-		retval = request_irq(state->irq, handler, IRQ_T(state),
-				     "serial", NULL);
-		if (retval) {
-			if (capable(CAP_SYS_ADMIN)) {
-				if (info->tty)
-					set_bit(TTY_IO_ERROR,
-						&info->tty->flags);
-				retval = 0;
-			}
-			goto errout;
-		}
-	}
-
-	/*
-	 * Insert serial port into IRQ chain.
-	 */
-	info->prev_port = 0;
-	info->next_port = IRQ_ports[state->irq];
-	if (info->next_port)
-		info->next_port->prev_port = info;
-	IRQ_ports[state->irq] = info;
-	figure_IRQ_timeout(state->irq);
-
-	/*
-	 * Clear the interrupt registers.
-	 */
-     /* (void) serial_inw(info, VAC_UART_INT_STATUS); */   /* (see above) */
-	(void) serial_inw(info, VAC_UART_RX);
-
-	/*
-	 * Now, initialize the UART 
-	 */
-	serial_outp(info, VAC_UART_MODE, VAC_UART_MODE_INITIAL); /*reset DLAB*/
-
-	/*
-	 * Finally, enable interrupts
-	 */
-	info->IER = VAC_UART_INT_RX_BREAK_CHANGE | VAC_UART_INT_RX_ERRS | \
-                        VAC_UART_INT_RX_READY;
-	serial_outp(info, VAC_UART_INT_MASK, info->IER); /*enable interrupts*/
-	
-	/*
-	 * And clear the interrupt registers again for luck.
-	 */
-	(void)serial_inp(info, VAC_UART_INT_STATUS);
-	(void)serial_inp(info, VAC_UART_RX);
-
-	if (info->tty)
-		clear_bit(TTY_IO_ERROR, &info->tty->flags);
-	info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
-
-	/*
-	 * Set up serial timers...
-	 */
-	mod_timer(&vacs_timer, jiffies + 2*HZ/100);
-
-	/*
-	 * and set the speed of the serial port
-	 */
-	change_speed(info);
-
-	info->flags |= ASYNC_INITIALIZED;
-	restore_flags(flags);
-	return 0;
-	
-errout:
-	restore_flags(flags);
-	return retval;
-}
-
-/*
- * This routine will shutdown a serial port; interrupts are disabled, and
- * DTR is dropped if the hangup on close termio flag is on.
- */
-static void shutdown(struct async_struct * info)
-{
-	unsigned long	flags;
-	struct serial_state *state;
-	int		retval;
-
-	if (!(info->flags & ASYNC_INITIALIZED))
-		return;
-
-	state = info->state;
-
-#ifdef SERIAL_DEBUG_OPEN
-	baget_printk("Shutting down serial port %d (irq %d)....", info->line,
-	       state->irq);
-#endif
-	
-	save_flags(flags); cli(); /* Disable interrupts */
-
-	/*
-	 * clear delta_msr_wait queue to avoid mem leaks: we may free the irq
-	 * here so the queue might never be waken up
-	 */
-	wake_up_interruptible(&info->delta_msr_wait);
-	
-	/*
-	 * First unlink the serial port from the IRQ chain...
-	 */
-	if (info->next_port)
-		info->next_port->prev_port = info->prev_port;
-	if (info->prev_port)
-		info->prev_port->next_port = info->next_port;
-	else
-		IRQ_ports[state->irq] = info->next_port;
-	figure_IRQ_timeout(state->irq);
-	
-	/*
-	 * Free the IRQ, if necessary
-	 */
-	if (state->irq && (!IRQ_ports[state->irq] ||
-			  !IRQ_ports[state->irq]->next_port)) {
-		if (IRQ_ports[state->irq]) {
-			free_irq(state->irq, NULL);
-			retval = request_irq(state->irq, rs_interrupt_single,
-					     IRQ_T(state), "serial", NULL);
-			
-			if (retval)
-				printk("serial shutdown: request_irq: error %d"
-				       "  Couldn't reacquire IRQ.\n", retval);
-		} else
-			free_irq(state->irq, NULL);
-	}
-
-	if (info->xmit_buf) {
-		free_page((unsigned long) info->xmit_buf);
-		info->xmit_buf = 0;
-	}
-
-	info->IER = 0;
-	serial_outp(info, VAC_UART_INT_MASK, 0x00);	/* disable all intrs */
-	
-	/* disable break condition */
-	serial_out(info, VAC_UART_MODE, serial_inp(info, VAC_UART_MODE) & \
-		   ~VAC_UART_MODE_SEND_BREAK);
-	
-	if (info->tty)
-		set_bit(TTY_IO_ERROR, &info->tty->flags);
-
-	info->flags &= ~ASYNC_INITIALIZED;
-	restore_flags(flags);
-}
-
-/*
- *  When we set line mode, we call this function 
- *  for Baget-specific adjustments.
- */
-
-static inline unsigned short vac_uart_mode_fixup (unsigned short cval)
-{
-#ifdef QUAD_UART_SPEED
-	/* 
-	 *  When we are using 4-x advantage in speed:
-	 *
-	 *  Disadvantage : can't support 75, 150 bauds
-	 *  Advantage    : can support 19200, 38400 bauds
-	 */
-	char speed = 7 & (cval >> 10);
-	cval &= ~(7 << 10);
-	cval |= VAC_UART_MODE_BAUD(speed-2);
-#endif
-
-	/* 
-	 *  In general, we have Tx and Rx ON all time
-	 *  and use int mask flag for their disabling.
-	 */
-	cval |= VAC_UART_MODE_RX_ENABLE;
-	cval |= VAC_UART_MODE_TX_ENABLE;
-	cval |= VAC_UART_MODE_CHAR_RX_ENABLE;
-	cval |= VAC_UART_MODE_CHAR_TX_ENABLE;
-
-        /* Low 4 bits are not used in UART */	
-	cval &= ~0xf; 
-
-	return cval; 
-}
-
-/*
- * This routine is called to set the UART divisor registers to match
- * the specified baud rate for a serial port.
- */
-static void change_speed(struct async_struct *info)
-{
-	unsigned short port;
-	int	quot = 0, baud_base, baud;
-	unsigned cflag, cval;
-	int	bits;
-	unsigned long	flags;
-
-	if (!info->tty || !info->tty->termios)
-		return;
-	cflag = info->tty->termios->c_cflag;
-	if (!(port = info->port))
-		return;
-
-	/* byte size and parity */
-	switch (cflag & CSIZE) {
-	      case CS7: cval = 0x0;  bits = 9; break;
-	      case CS8: cval = VAC_UART_MODE_8BIT_CHAR; bits = 10; break;
-	      /* Never happens, but GCC is too dumb to figure it out */
-	      case CS5: 
-	      case CS6: 
-	      default:  cval = 0x0; bits = 9; break;
-	      }
-	cval &= ~VAC_UART_MODE_PARITY_ENABLE;
-	if (cflag & PARENB) {
-		cval |= VAC_UART_MODE_PARITY_ENABLE;
-		bits++;
-	}
-	if (cflag & PARODD)
-		cval |= VAC_UART_MODE_PARITY_ODD;
-
-	/* Determine divisor based on baud rate */
-	baud = tty_get_baud_rate(info->tty);
-	if (!baud)
-		baud = 9600;    /* B0 transition handled in rs_set_termios */
-	baud_base = info->state->baud_base;
-	if (baud == 38400 &&
-	    ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST))
-		quot = info->state->custom_divisor;
-	else {
-		if (baud == 134)
-			/* Special case since 134 is really 134.5 */
-			quot = (2*baud_base / 269);
-		else if (baud)
-			quot = baud_base / baud;
-	}
-	/* If the quotient is ever zero, default to 9600 bps */
-	if (!quot)
-		quot = baud_base / 9600;
-	info->quot = quot;
-	info->timeout = ((info->xmit_fifo_size*HZ*bits*quot) / baud_base);
-	info->timeout += HZ/50;		/* Add .02 seconds of slop */
-
-	serial_out(info, VAC_UART_INT_MASK, info->IER);
-
-	/*
-	 * Set up parity check flag
-	 */
-#define RELEVANT_IFLAG(iflag) (iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK))
-
-	info->read_status_mask = VAC_UART_STATUS_RX_ERR_OVERRUN | \
-                VAC_UART_STATUS_TX_EMPTY | VAC_UART_STATUS_RX_READY;
-	if (I_INPCK(info->tty))
-		info->read_status_mask |= VAC_UART_STATUS_RX_ERR_FRAME | \
-			VAC_UART_STATUS_RX_ERR_PARITY;
-	if (I_BRKINT(info->tty) || I_PARMRK(info->tty))
-		info->read_status_mask |= VAC_UART_STATUS_RX_BREAK_CHANGE;
-	
-	/*
-	 * Characters to ignore
-	 */
-	info->ignore_status_mask = 0;
-	if (I_IGNPAR(info->tty))
-		info->ignore_status_mask |= VAC_UART_STATUS_RX_ERR_PARITY | \
-			VAC_UART_STATUS_RX_ERR_FRAME;
-	if (I_IGNBRK(info->tty)) {
-		info->ignore_status_mask |= VAC_UART_STATUS_RX_BREAK_CHANGE;
-		/*
-		 * If we're ignore parity and break indicators, ignore 
-		 * overruns too.  (For real raw support).
-		 */
-		if (I_IGNPAR(info->tty))
-			info->ignore_status_mask |= \
-				VAC_UART_STATUS_RX_ERR_OVERRUN;
-	}
-	/*
-	 * !!! ignore all characters if CREAD is not set
-	 */
-	if ((cflag & CREAD) == 0)
-		info->ignore_status_mask |= VAC_UART_STATUS_RX_READY;
-	save_flags(flags); cli();
-
-
-	switch (baud) {
-	default:
-	case 9600:
-		cval |= VAC_UART_MODE_BAUD(7);
-		break;
-	case 4800:
-		cval |= VAC_UART_MODE_BAUD(6);
-		break;
-	case 2400:
-		cval |= VAC_UART_MODE_BAUD(5);
-		break;
-	case 1200:
-		cval |= VAC_UART_MODE_BAUD(4);
-		break;
-	case 600:
-		cval |= VAC_UART_MODE_BAUD(3);
-		break;
-	case 300:
-		cval |= VAC_UART_MODE_BAUD(2);
-		break;
-#ifndef QUAD_UART_SPEED
-	case 150:
-#else
-	case 38400:
-#endif
-		cval |= VAC_UART_MODE_BAUD(1);
-		break;
-#ifndef QUAD_UART_SPEED
-	case 75:
-#else
-	case 19200:
-#endif
-		cval |= VAC_UART_MODE_BAUD(0);
-		break;
-	}
-
-	/* Baget VAC need some adjustments for computed value */
-	cval = vac_uart_mode_fixup(cval);
-
-	serial_outp(info, VAC_UART_MODE, cval);
-	restore_flags(flags);
-}
-
-static void rs_put_char(struct tty_struct *tty, unsigned char ch)
-{
-	struct async_struct *info = (struct async_struct *)tty->driver_data;
-	unsigned long flags;
-
-	if (serial_paranoia_check(info, tty->device, "rs_put_char"))
-		return;
-
-	if (!tty || !info->xmit_buf)
-		return;
-
-	save_flags(flags); cli();
-	if (info->xmit_cnt >= SERIAL_XMIT_SIZE - 1) {
-		restore_flags(flags);
-		return;
-	}
-
-	info->xmit_buf[info->xmit_head++] = ch;
-	info->xmit_head &= SERIAL_XMIT_SIZE-1;
-	info->xmit_cnt++;
-	restore_flags(flags);
-}
-
-static void rs_flush_chars(struct tty_struct *tty)
-{
-	struct async_struct *info = (struct async_struct *)tty->driver_data;
-	unsigned long flags;
-				
-	if (serial_paranoia_check(info, tty->device, "rs_flush_chars"))
-		return;
-
-	if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
-	    !info->xmit_buf)
-		return;
-
-	save_flags(flags); cli();
-        info->IER |= VAC_UART_INT_TX_EMPTY;
-	serial_out(info, VAC_UART_INT_MASK, info->IER);
-	restore_flags(flags);
-}
-
-static int rs_write(struct tty_struct * tty, int from_user,
-		    const unsigned char *buf, int count)
-{
-	int	c, ret = 0;
-	struct async_struct *info = (struct async_struct *)tty->driver_data;
-	unsigned long flags;
-		
-	if (serial_paranoia_check(info, tty->device, "rs_write"))
-		return 0;
-
-	if (!tty || !info->xmit_buf || !tmp_buf)
-		return 0;
-
-	save_flags(flags);
-	if (from_user) {
-		down(&tmp_buf_sem);
-		while (1) {
-			c = MIN(count,
-				MIN(SERIAL_XMIT_SIZE - info->xmit_cnt - 1,
-				    SERIAL_XMIT_SIZE - info->xmit_head));
-			if (c <= 0)
-				break;
-
-			c -= copy_from_user(tmp_buf, buf, c);
-			if (!c) {
-				if (!ret)
-					ret = -EFAULT;
-				break;
-			}
-			cli();
-			c = MIN(c, MIN(SERIAL_XMIT_SIZE - info->xmit_cnt - 1,
-				       SERIAL_XMIT_SIZE - info->xmit_head));
-			memcpy(info->xmit_buf + info->xmit_head, tmp_buf, c);
-			info->xmit_head = ((info->xmit_head + c) &
-					   (SERIAL_XMIT_SIZE-1));
-			info->xmit_cnt += c;
-			restore_flags(flags);
-			buf += c;
-			count -= c;
-			ret += c;
-		}
-		up(&tmp_buf_sem);
-	} else {
-		while (1) {
-			cli();		
-			c = MIN(count,
-				MIN(SERIAL_XMIT_SIZE - info->xmit_cnt - 1,
-				    SERIAL_XMIT_SIZE - info->xmit_head));
-			if (c <= 0) {
-				restore_flags(flags);
-				break;
-			}
-			memcpy(info->xmit_buf + info->xmit_head, buf, c);
-			info->xmit_head = ((info->xmit_head + c) &
-					   (SERIAL_XMIT_SIZE-1));
-			info->xmit_cnt += c;
-			restore_flags(flags);
-			buf += c;
-			count -= c;
-			ret += c;
-		}
-	}
-	if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped &&
-            !(info->IER & VAC_UART_INT_TX_EMPTY)) {
-                info->IER |= VAC_UART_INT_TX_EMPTY;
-		serial_out(info, VAC_UART_INT_MASK, info->IER);
-	}
-	return ret;
-}
-
-static int rs_write_room(struct tty_struct *tty)
-{
-	struct async_struct *info = (struct async_struct *)tty->driver_data;
-	int	ret;
-				
-	if (serial_paranoia_check(info, tty->device, "rs_write_room"))
-		return 0;
-	ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
-	if (ret < 0)
-		ret = 0;
-	return ret;
-}
-
-static int rs_chars_in_buffer(struct tty_struct *tty)
-{
-	struct async_struct *info = (struct async_struct *)tty->driver_data;
-				
-	if (serial_paranoia_check(info, tty->device, "rs_chars_in_buffer"))
-		return 0;
-	return info->xmit_cnt;
-}
-
-static void rs_flush_buffer(struct tty_struct *tty)
-{
-	struct async_struct *info = (struct async_struct *)tty->driver_data;
-	unsigned long flags; 
-				
-	if (serial_paranoia_check(info, tty->device, "rs_flush_buffer"))
-		return;
-
-	save_flags(flags); cli();
-	info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
-	restore_flags(flags); 
-
-	wake_up_interruptible(&tty->write_wait);
-	if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) &&
-	    tty->ldisc.write_wakeup)
-		(tty->ldisc.write_wakeup)(tty);
-}
-
-/*
- * This function is used to send a high-priority XON/XOFF character to
- * the device
- */
-static void rs_send_xchar(struct tty_struct *tty, char ch)
-{
-	struct async_struct *info = (struct async_struct *)tty->driver_data;
-
-	if (serial_paranoia_check(info, tty->device, "rs_send_char"))
-		return;
-
-	info->x_char = ch;
-	if (ch) {
-		/* Make sure transmit interrupts are on */
-                info->IER |= VAC_UART_INT_TX_EMPTY;
-		serial_out(info, VAC_UART_INT_MASK, info->IER);
-	}
-}
-
-/*
- * ------------------------------------------------------------
- * rs_throttle()
- * 
- * This routine is called by the upper-layer tty layer to signal that
- * incoming characters should be throttled.
- * ------------------------------------------------------------
- */
-static void rs_throttle(struct tty_struct * tty)
-{
-	struct async_struct *info = (struct async_struct *)tty->driver_data;
-
-#ifdef SERIAL_DEBUG_THROTTLE
-	char	buf[64];
-	
-	baget_printk("throttle %s: %d....\n", tty_name(tty, buf),
-	       tty->ldisc.chars_in_buffer(tty));
-#endif
-
-	if (serial_paranoia_check(info, tty->device, "rs_throttle"))
-		return;
-	
-	if (I_IXOFF(tty))
-		rs_send_xchar(tty, STOP_CHAR(tty));
-}
-
-static void rs_unthrottle(struct tty_struct * tty)
-{
-	struct async_struct *info = (struct async_struct *)tty->driver_data;
-#ifdef SERIAL_DEBUG_THROTTLE
-	char	buf[64];
-	
-	baget_printk("unthrottle %s: %d....\n", tty_name(tty, buf),
-	       tty->ldisc.chars_in_buffer(tty));
-#endif
-
-	if (serial_paranoia_check(info, tty->device, "rs_unthrottle"))
-		return;
-	
-	if (I_IXOFF(tty)) {
-		if (info->x_char)
-			info->x_char = 0;
-		else
-			rs_send_xchar(tty, START_CHAR(tty));
-	}
-}
-
-/*
- * ------------------------------------------------------------
- * rs_ioctl() and friends
- * ------------------------------------------------------------
- */
-
-static int get_serial_info(struct async_struct * info,
-			   struct serial_struct * retinfo)
-{
-	struct serial_struct tmp;
-	struct serial_state *state = info->state;
-   
-	if (!retinfo)
-		return -EFAULT;
-	memset(&tmp, 0, sizeof(tmp));
-	tmp.type = state->type;
-	tmp.line = state->line;
-	tmp.port = state->port;
-	tmp.irq = state->irq;
-	tmp.flags = state->flags;
-	tmp.xmit_fifo_size = state->xmit_fifo_size;
-	tmp.baud_base = state->baud_base;
-	tmp.close_delay = state->close_delay;
-	tmp.closing_wait = state->closing_wait;
-	tmp.custom_divisor = state->custom_divisor;
-	tmp.hub6 = state->hub6;
-	if (copy_to_user(retinfo,&tmp,sizeof(*retinfo)))
-		return -EFAULT;
-	return 0;
-}
-
-static int set_serial_info(struct async_struct * info,
-			   struct serial_struct * new_info)
-{
-	struct serial_struct new_serial;
- 	struct serial_state old_state, *state;
-	unsigned int		i,change_irq,change_port;
-	int 			retval = 0;
-
-	if (copy_from_user(&new_serial,new_info,sizeof(new_serial)))
-		return -EFAULT;
-	state = info->state;
-	old_state = *state;
-  
-	change_irq = new_serial.irq != state->irq;
-	change_port = (new_serial.port != state->port) ||
-		(new_serial.hub6 != state->hub6);
-  
-	if (!capable(CAP_SYS_ADMIN)) {
-		if (change_irq || change_port ||
-		    (new_serial.baud_base != state->baud_base) ||
-		    (new_serial.type != state->type) ||
-		    (new_serial.close_delay != state->close_delay) ||
-		    (new_serial.xmit_fifo_size != state->xmit_fifo_size) ||
-		    ((new_serial.flags & ~ASYNC_USR_MASK) !=
-		     (state->flags & ~ASYNC_USR_MASK)))
-			return -EPERM;
-		state->flags = ((state->flags & ~ASYNC_USR_MASK) |
-			       (new_serial.flags & ASYNC_USR_MASK));
-		info->flags = ((state->flags & ~ASYNC_USR_MASK) |
-			       (info->flags & ASYNC_USR_MASK));
-		state->custom_divisor = new_serial.custom_divisor;
-		goto check_and_exit;
-	}
-
-	new_serial.irq = new_serial.irq;
-
-	if ((new_serial.irq >= NR_IRQS) || (new_serial.port > 0xffff) ||
-	    (new_serial.baud_base == 0) || (new_serial.type < PORT_UNKNOWN) ||
-	    (new_serial.type > PORT_MAX) || (new_serial.type == PORT_CIRRUS) ||
-	    (new_serial.type == PORT_STARTECH)) {
-		return -EINVAL;
-	}
-
-	if ((new_serial.type != state->type) ||
-	    (new_serial.xmit_fifo_size <= 0))
-		new_serial.xmit_fifo_size =
-			uart_config[state->type].dfl_xmit_fifo_size;
-
-	/* Make sure address is not already in use */
-	if (new_serial.type) {
-		for (i = 0 ; i < NR_PORTS; i++)
-			if ((state != &rs_table[i]) &&
-			    (rs_table[i].port == new_serial.port) &&
-			    rs_table[i].type)
-				return -EADDRINUSE;
-	}
-
-	if ((change_port || change_irq) && (state->count > 1))
-		return -EBUSY;
-
-	/*
-	 * OK, past this point, all the error checking has been done.
-	 * At this point, we start making changes.....
-	 */
-
-	state->baud_base = new_serial.baud_base;
-	state->flags = ((state->flags & ~ASYNC_FLAGS) |
-			(new_serial.flags & ASYNC_FLAGS));
-	info->flags = ((state->flags & ~ASYNC_INTERNAL_FLAGS) |
-		       (info->flags & ASYNC_INTERNAL_FLAGS));
-	state->custom_divisor = new_serial.custom_divisor;
-	state->type = new_serial.type;
-	state->close_delay = new_serial.close_delay * HZ/100;
-	state->closing_wait = new_serial.closing_wait * HZ/100;
-	info->tty->low_latency = (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
-	info->xmit_fifo_size = state->xmit_fifo_size =
-		new_serial.xmit_fifo_size;
-
-	release_region(state->port,8); 
-	if (change_port || change_irq) {
-		/*
-		 * We need to shutdown the serial port at the old
-		 * port/irq combination.
-		 */
-		shutdown(info);
-		state->irq = new_serial.irq;
-		info->port = state->port = new_serial.port;
-		info->hub6 = state->hub6 = new_serial.hub6;
-	}
-	if (state->type != PORT_UNKNOWN)
-		request_region(state->port,8,"serial(set)");
-
-	
-check_and_exit:
-	if (!state->port || !state->type)
-		return 0;
-	if (info->flags & ASYNC_INITIALIZED) {
-		if (((old_state.flags & ASYNC_SPD_MASK) !=
-		     (state->flags & ASYNC_SPD_MASK)) ||
-		    (old_state.custom_divisor != state->custom_divisor)) {
-			if ((state->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
-				info->tty->alt_speed = 57600;
-			if ((state->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
-				info->tty->alt_speed = 115200;
-			if ((state->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
-				info->tty->alt_speed = 230400;
-			if ((state->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
-				info->tty->alt_speed = 460800;
-			change_speed(info);
-		}
-	} else
-		retval = startup(info);
-	return retval;
-}
-
-
-/*
- * get_lsr_info - get line status register info
- *
- * Purpose: Let user call ioctl() to get info when the UART physically
- * 	    is emptied.  On bus types like RS485, the transmitter must
- * 	    release the bus after transmitting. This must be done when
- * 	    the transmit shift register is empty, not be done when the
- * 	    transmit holding register is empty.  This functionality
- * 	    allows an RS485 driver to be written in user space. 
- */
-static int get_lsr_info(struct async_struct * info, unsigned int *value)
-{
-	unsigned short status;
-	unsigned int result;
-	unsigned long flags; 
-
-	save_flags(flags); cli();
-	status = serial_inw(info, VAC_UART_INT_STATUS);
-	restore_flags(flags);
-	result = ((status & VAC_UART_STATUS_TX_EMPTY) ? TIOCSER_TEMT : 0);
-	return put_user(result,value);
-}
-
-
-static int get_modem_info(struct async_struct * info, unsigned int *value)
-{
-	unsigned int result;
-
-	result = TIOCM_CAR | TIOCM_DSR;
-	return put_user(result,value);
-}
-
-static int set_modem_info(struct async_struct * info, unsigned int cmd,
-			  unsigned int *value)
-{
-	unsigned int arg;
-
-	if (get_user(arg, value))
-		return -EFAULT;
-	switch (cmd) {
-	default:
-		return -EINVAL;
-	}
-	return 0;
-}
-
-static int do_autoconfig(struct async_struct * info)
-{
-	int			retval;
-	
-	if (!capable(CAP_SYS_ADMIN))
-		return -EPERM;
-	
-	if (info->state->count > 1)
-		return -EBUSY;
-	
-	shutdown(info);
-
-	autoconfig(info->state);
-
-	retval = startup(info);
-	if (retval)
-		return retval;
-	return 0;
-}
-
-/*
- * rs_break() --- routine which turns the break handling on or off
- */
-static void rs_break(struct tty_struct *tty, int break_state)
-{
-	struct async_struct * info = (struct async_struct *)tty->driver_data;
-	unsigned long flags;
-	
-	if (serial_paranoia_check(info, tty->device, "rs_break"))
-		return;
-
-	if (!info->port)
-		return;
-	save_flags(flags); cli();
-	if (break_state == -1)
-		serial_outp(info, VAC_UART_MODE,
-			   serial_inp(info, VAC_UART_MODE) | \
-			    VAC_UART_MODE_SEND_BREAK);
-	else
-		serial_outp(info, VAC_UART_MODE,
-			   serial_inp(info, VAC_UART_MODE) & \
-			    ~VAC_UART_MODE_SEND_BREAK);
-	restore_flags(flags);
-}
-
-static int rs_ioctl(struct tty_struct *tty, struct file * file,
-		    unsigned int cmd, unsigned long arg)
-{
-	int error;
-	struct async_struct * info = (struct async_struct *)tty->driver_data;
-	struct async_icount cprev, cnow;	/* kernel counter temps */
-	struct serial_icounter_struct *p_cuser;	/* user space */
-	unsigned long flags; 
-
-	if (serial_paranoia_check(info, tty->device, "rs_ioctl"))
-		return -ENODEV;
-
-	if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) &&
-	    (cmd != TIOCSERCONFIG) && (cmd != TIOCSERGSTRUCT) &&
-	    (cmd != TIOCMIWAIT) && (cmd != TIOCGICOUNT)) {
-		if (tty->flags & (1 << TTY_IO_ERROR))
-		    return -EIO;
-	}
-	
-	switch (cmd) {
-		case TIOCMGET:
-			return get_modem_info(info, (unsigned int *) arg);
-		case TIOCMBIS:
-		case TIOCMBIC:
-		case TIOCMSET:
-			return set_modem_info(info, cmd, (unsigned int *) arg);
-		case TIOCGSERIAL:
-			return get_serial_info(info,
-					       (struct serial_struct *) arg);
-		case TIOCSSERIAL:
-			return set_serial_info(info,
-					       (struct serial_struct *) arg);
-		case TIOCSERCONFIG:
-			return do_autoconfig(info);
-
-		case TIOCSERGETLSR: /* Get line status register */
-			return get_lsr_info(info, (unsigned int *) arg);
-
-		case TIOCSERGSTRUCT:
-			if (copy_to_user((struct async_struct *) arg,
-					 info, sizeof(struct async_struct)))
-				return -EFAULT;
-			return 0;
-				
-		/*
-		 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS)to change
-		 * - mask passed in arg for lines of interest
- 		 *   (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
-		 * Caller should use TIOCGICOUNT to see which one it was
-		 */
-		case TIOCMIWAIT:
-			save_flags(flags); cli();
-			/* note the counters on entry */
-			cprev = info->state->icount;
-			restore_flags(flags);
-			while (1) {
-				interruptible_sleep_on(&info->delta_msr_wait);
-				/* see if a signal did it */
-				if (signal_pending(current))
-					return -ERESTARTSYS;
-				save_flags(flags); cli(); 
-				cnow = info->state->icount; /* atomic copy */
-				restore_flags(flags); 
-				if (cnow.rng == cprev.rng && 
-				    cnow.dsr == cprev.dsr && 
-				    cnow.dcd == cprev.dcd && 
-				    cnow.cts == cprev.cts)
-					return -EIO; /* no change => error */
-				if ( ((arg & TIOCM_RNG) && 
-				      (cnow.rng != cprev.rng)) ||
-				     ((arg & TIOCM_DSR) && 
-				      (cnow.dsr != cprev.dsr)) ||
-				     ((arg & TIOCM_CD)  && 
-				      (cnow.dcd != cprev.dcd)) ||
-				     ((arg & TIOCM_CTS) && 
-				      (cnow.cts != cprev.cts)) ) {
-					return 0;
-				}
-				cprev = cnow;
-			}
-			/* NOTREACHED */
-
-		/* 
-		 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
-		 * Return: write counters to the user passed counter struct
-		 * NB: both 1->0 and 0->1 transitions are counted except for
-		 *     RI where only 0->1 is counted.
-		 */
-		case TIOCGICOUNT:
-			save_flags(flags); cli(); 
-			cnow = info->state->icount;
-			restore_flags(flags);
-			p_cuser = (struct serial_icounter_struct *) arg;
-			error = put_user(cnow.cts, &p_cuser->cts);
-			if (error) return error;
-			error = put_user(cnow.dsr, &p_cuser->dsr);
-			if (error) return error;
-			error = put_user(cnow.rng, &p_cuser->rng);
-			if (error) return error;
-			error = put_user(cnow.dcd, &p_cuser->dcd);
-			if (error) return error;
-                        error = put_user(cnow.rx, &p_cuser->rx);
-                        if (error) return error;
-                        error = put_user(cnow.tx, &p_cuser->tx);
-                        if (error) return error;
-                        error = put_user(cnow.frame, &p_cuser->frame);
-                        if (error) return error;
-                        error = put_user(cnow.overrun, &p_cuser->overrun);
-                        if (error) return error;
-                        error = put_user(cnow.parity, &p_cuser->parity);
-                        if (error) return error;
-                        error = put_user(cnow.brk, &p_cuser->brk);
-                        if (error) return error;
-                        error = put_user(cnow.buf_overrun, &p_cuser->buf_overrun);
-
-			if (error) return error;
-			return 0;
-
-                case TIOCSERGWILD:
-                case TIOCSERSWILD:
-                       /* "setserial -W" is called in Debian boot */
-                        printk ("TIOCSER?WILD ioctl obsolete, ignored.\n");
-                        return 0;
- 
-		default:
-			return -ENOIOCTLCMD;
-		}
-	return 0;
-}
-
-static void rs_set_termios(struct tty_struct *tty, struct termios *old_termios)
-{
-	struct async_struct *info = (struct async_struct *)tty->driver_data;
-	unsigned int cflag = tty->termios->c_cflag;
-
-	if (   (cflag == old_termios->c_cflag)
-	    && (   RELEVANT_IFLAG(tty->termios->c_iflag) 
-		== RELEVANT_IFLAG(old_termios->c_iflag)))
-	  return;
-
-	change_speed(info);
-
-	/* Handle turning off CRTSCTS */
-	if ((old_termios->c_cflag & CRTSCTS) &&
-	    !(cflag & CRTSCTS)) {
-		tty->hw_stopped = 0;
-		rs_start(tty);
-	}
-
-}
-
-/*
- * ------------------------------------------------------------
- * rs_close()
- * 
- * This routine is called when the serial port gets closed.  First, we
- * wait for the last remaining data to be sent.  Then, we unlink its
- * async structure from the interrupt chain if necessary, and we free
- * that IRQ if nothing is left in the chain.
- * ------------------------------------------------------------
- */
-static void rs_close(struct tty_struct *tty, struct file * filp)
-{
-	struct async_struct * info = (struct async_struct *)tty->driver_data;
-	struct serial_state *state;
-	unsigned long flags;
-
-	if (!info || serial_paranoia_check(info, tty->device, "rs_close"))
-		return;
-
-	state = info->state;
-	
-	save_flags(flags); cli();
-	
-	if (tty_hung_up_p(filp)) {
-		DBG_CNT("before DEC-hung");
-		MOD_DEC_USE_COUNT;
-		restore_flags(flags);
-		return;
-	}
-	
-#ifdef SERIAL_DEBUG_OPEN
-	baget_printk("rs_close ttys%d, count = %d\n", 
-		     info->line, state->count);
-#endif
-	if ((tty->count == 1) && (state->count != 1)) {
-		/*
-		 * Uh, oh.  tty->count is 1, which means that the tty
-		 * structure will be freed.  state->count should always
-		 * be one in these conditions.  If it's greater than
-		 * one, we've got real problems, since it means the
-		 * serial port won't be shutdown.
-		 */
-		baget_printk("rs_close: bad serial port count; "
-			     "tty->count is 1, "
-			     "state->count is %d\n", state->count);
-		state->count = 1;
-	}
-	if (--state->count < 0) {
-		baget_printk("rs_close: bad serial port count for "
-			     "ttys%d: %d\n",
-			     info->line, state->count);
-		state->count = 0;
-	}
-	if (state->count) {
-		DBG_CNT("before DEC-2");
-		MOD_DEC_USE_COUNT;
-		restore_flags(flags);
-		return;
-	}
-	info->flags |= ASYNC_CLOSING;
-	/*
-	 * Save the termios structure, since this port may have
-	 * separate termios for callout and dialin.
-	 */
-	if (info->flags & ASYNC_NORMAL_ACTIVE)
-		info->state->normal_termios = *tty->termios;
-	if (info->flags & ASYNC_CALLOUT_ACTIVE)
-		info->state->callout_termios = *tty->termios;
-	/*
-	 * Now we wait for the transmit buffer to clear; and we notify 
-	 * the line discipline to only process XON/XOFF characters.
-	 */
-	tty->closing = 1;
-	if (info->closing_wait != ASYNC_CLOSING_WAIT_NONE)
-		tty_wait_until_sent(tty, info->closing_wait);
-	/*
-	 * At this point we stop accepting input.  To do this, we
-	 * disable the receive line status interrupts, and tell the
-	 * interrupt driver to stop checking the data ready bit in the
-	 * line status register.
-	 */
-	info->IER &= ~(VAC_UART_INT_RX_BREAK_CHANGE | VAC_UART_INT_RX_ERRS);
-	info->read_status_mask &= ~VAC_UART_STATUS_RX_READY;
-	if (info->flags & ASYNC_INITIALIZED) {
-		serial_outw(info, VAC_UART_INT_MASK, info->IER);
-		/*
-		 * Before we drop DTR, make sure the UART transmitter
-		 * has completely drained; this is especially
-		 * important if there is a transmit FIFO!
-		 */
-		rs_wait_until_sent(tty, info->timeout);
-	}
-	shutdown(info);
-	if (tty->driver.flush_buffer)
-		tty->driver.flush_buffer(tty);
-	if (tty->ldisc.flush_buffer)
-		tty->ldisc.flush_buffer(tty);
-	tty->closing = 0;
-	info->event = 0;
-	info->tty = 0;
-	if (info->blocked_open) {
-		if (info->close_delay) {
-			current->state = TASK_INTERRUPTIBLE;
-			schedule_timeout(info->close_delay);
-		}
-		wake_up_interruptible(&info->open_wait);
-	}
-	info->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CALLOUT_ACTIVE|
-			 ASYNC_CLOSING);
-	wake_up_interruptible(&info->close_wait);
-	MOD_DEC_USE_COUNT;
-	restore_flags(flags);
-}
-
-/*
- * rs_wait_until_sent() --- wait until the transmitter is empty
- */
-static void rs_wait_until_sent(struct tty_struct *tty, int timeout)
-{
-	struct async_struct * info = (struct async_struct *)tty->driver_data;
-	unsigned long orig_jiffies, char_time;
-	int lsr;
-	
-	if (serial_paranoia_check(info, tty->device, "rs_wait_until_sent"))
-		return;
-
-	if (info->state->type == PORT_UNKNOWN)
-		return;
-
-        if (info->xmit_fifo_size == 0)
-                return; /* Just in case.... */
-
-	orig_jiffies = jiffies;
-	/*
-	 * Set the check interval to be 1/5 of the estimated time to
-	 * send a single character, and make it at least 1.  The check
-	 * interval should also be less than the timeout.
-	 * 
-	 * Note: we have to use pretty tight timings here to satisfy
-	 * the NIST-PCTS.
-	 */
-	char_time = (info->timeout - HZ/50) / info->xmit_fifo_size;
-	char_time = char_time / 5;
-	if (char_time == 0)
-		char_time = 1;
-	if (timeout)
-	  char_time = MIN(char_time, timeout);
-#ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
-	baget_printk("In rs_wait_until_sent(%d) check=%lu...", 
-		     timeout, char_time);
-	baget_printk("jiff=%lu...", jiffies);
-#endif
-	while (!((lsr = serial_inp(info, VAC_UART_INT_STATUS)) & \
-		 VAC_UART_STATUS_TX_EMPTY)) {
-#ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
-		baget_printk("lsr = %d (jiff=%lu)...", lsr, jiffies);
-#endif
-		current->state = TASK_INTERRUPTIBLE;
-		schedule_timeout(char_time);
-		if (signal_pending(current))
-			break;
-		if (timeout && time_after(jiffies, orig_jiffies + timeout))
-			break;
-	}
-	current->state = TASK_RUNNING;
-#ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
-	baget_printk("lsr = %d (jiff=%lu)...done\n", lsr, jiffies);
-#endif
-}
-
-/*
- * rs_hangup() --- called by tty_hangup() when a hangup is signaled.
- */
-static void rs_hangup(struct tty_struct *tty)
-{
-	struct async_struct * info = (struct async_struct *)tty->driver_data;
-	struct serial_state *state = info->state;
-	
-	if (serial_paranoia_check(info, tty->device, "rs_hangup"))
-		return;
-
-	state = info->state;
-	
-	rs_flush_buffer(tty);
-	shutdown(info);
-	info->event = 0;
-	state->count = 0;
-	info->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CALLOUT_ACTIVE);
-	info->tty = 0;
-	wake_up_interruptible(&info->open_wait);
-}
-
-/*
- * ------------------------------------------------------------
- * rs_open() and friends
- * ------------------------------------------------------------
- */
-static int block_til_ready(struct tty_struct *tty, struct file * filp,
-			   struct async_struct *info)
-{
-	DECLARE_WAITQUEUE(wait, current);
-	struct serial_state *state = info->state;
-	int		retval;
-	int		do_clocal = 0,  extra_count = 0;  
-	unsigned long   flags; 
-
-	/*
-	 * If the device is in the middle of being closed, then block
-	 * until it's done, and then try again.
-	 */
-	if (tty_hung_up_p(filp) ||
-	    (info->flags & ASYNC_CLOSING)) {
-		if (info->flags & ASYNC_CLOSING)
-			interruptible_sleep_on(&info->close_wait);
-#ifdef SERIAL_DO_RESTART
-		return ((info->flags & ASYNC_HUP_NOTIFY) ?
-			-EAGAIN : -ERESTARTSYS);
-#else
-		return -EAGAIN;
-#endif
-	}
-
-	/*
-	 * If this is a callout device, then just make sure the normal
-	 * device isn't being used.
-	 */
-	if (tty->driver.subtype == SERIAL_TYPE_CALLOUT) {
-		if (info->flags & ASYNC_NORMAL_ACTIVE)
-			return -EBUSY;
-		if ((info->flags & ASYNC_CALLOUT_ACTIVE) &&
-		    (info->flags & ASYNC_SESSION_LOCKOUT) &&
-		    (info->session != current->session))
-		    return -EBUSY;
-		if ((info->flags & ASYNC_CALLOUT_ACTIVE) &&
-		    (info->flags & ASYNC_PGRP_LOCKOUT) &&
-		    (info->pgrp != current->pgrp))
-		    return -EBUSY;
-		info->flags |= ASYNC_CALLOUT_ACTIVE;
-		return 0;
-	}
-	
-	/*
-	 * If non-blocking mode is set, or the port is not enabled,
-	 * then make the check up front and then exit.
-	 */
-	if ((filp->f_flags & O_NONBLOCK) ||
-	    (tty->flags & (1 << TTY_IO_ERROR))) {
-		if (info->flags & ASYNC_CALLOUT_ACTIVE)
-			return -EBUSY;
-		info->flags |= ASYNC_NORMAL_ACTIVE;
-		return 0;
-	}
-
-	if (info->flags & ASYNC_CALLOUT_ACTIVE) {
-		if (state->normal_termios.c_cflag & CLOCAL)
-			do_clocal = 1;
-	} else {
-		if (tty->termios->c_cflag & CLOCAL)
-			do_clocal = 1;
-	}
-	
-	/*
-	 * Block waiting for the carrier detect and the line to become
-	 * free (i.e., not in use by the callout).  While we are in
-	 * this loop, state->count is dropped by one, so that
-	 * rs_close() knows when to free things.  We restore it upon
-	 * exit, either normal or abnormal.
-	 */
-	retval = 0;
-	add_wait_queue(&info->open_wait, &wait);
-#ifdef SERIAL_DEBUG_OPEN
-	baget_printk("block_til_ready before block: ttys%d, count = %d\n",
-	       state->line, state->count);
-#endif
-	save_flags(flags); cli(); 
-	if (!tty_hung_up_p(filp)) {
-		extra_count = 1; 
-		state->count--;
-	}
-	restore_flags(flags); 
-	info->blocked_open++;
-	while (1) {
-		set_current_state(TASK_INTERRUPTIBLE);
-		if (tty_hung_up_p(filp) ||
-		    !(info->flags & ASYNC_INITIALIZED)) {
-#ifdef SERIAL_DO_RESTART
-			if (info->flags & ASYNC_HUP_NOTIFY)
-				retval = -EAGAIN;
-			else
-				retval = -ERESTARTSYS;	
-#else
-			retval = -EAGAIN;
-#endif
-			break;
-		}
-		if (!(info->flags & ASYNC_CALLOUT_ACTIVE) &&
-		    !(info->flags & ASYNC_CLOSING))
-			break;
-		if (signal_pending(current)) {
-			retval = -ERESTARTSYS;
-			break;
-		}
-#ifdef SERIAL_DEBUG_OPEN
-		baget_printk("block_til_ready blocking: ttys%d, count = %d\n",
-		       info->line, state->count);
-#endif
-		schedule();
-	}
-	current->state = TASK_RUNNING;
-	remove_wait_queue(&info->open_wait, &wait);
-	if (extra_count)
-		state->count++;
-	info->blocked_open--;
-#ifdef SERIAL_DEBUG_OPEN
-	baget_printk("block_til_ready after blocking: ttys%d, count = %d\n",
-	       info->line, state->count);
-#endif
-	if (retval)
-		return retval;
-	info->flags |= ASYNC_NORMAL_ACTIVE;
-	return 0;
-}
-
-static int get_async_struct(int line, struct async_struct **ret_info)
-{
-	struct async_struct *info;
-	struct serial_state *sstate;
-
-	sstate = rs_table + line;
-	sstate->count++;
-	if (sstate->info) {
-		*ret_info = sstate->info;
-		return 0;
-	}
-	info = kmalloc(sizeof(struct async_struct), GFP_KERNEL);
-	if (!info) {
-		sstate->count--;
-		return -ENOMEM;
-	}
-	memset(info, 0, sizeof(struct async_struct));
-	init_waitqueue_head(&info->open_wait);
-	init_waitqueue_head(&info->close_wait);
-	init_waitqueue_head(&info->delta_msr_wait);
-	info->magic = SERIAL_MAGIC;
-	info->port = sstate->port;
-	info->flags = sstate->flags;
-	info->xmit_fifo_size = sstate->xmit_fifo_size;
-	info->line = line;
-	info->tqueue.routine = do_softint;
-	info->tqueue.data = info;
-	info->state = sstate;
-	if (sstate->info) {
-		kfree(info);
-		*ret_info = sstate->info;
-		return 0;
-	}
-	*ret_info = sstate->info = info;
-	return 0;
-}
-
-/*
- * This routine is called whenever a serial port is opened.  It
- * enables interrupts for a serial port, linking in its async structure into
- * the IRQ chain.   It also performs the serial-specific
- * initialization for the tty structure.
- */
-static int rs_open(struct tty_struct *tty, struct file * filp)
-{
-	struct async_struct	*info;
-	int 			retval, line;
-	unsigned long		page;
-
-	MOD_INC_USE_COUNT; 
-	line = MINOR(tty->device) - tty->driver.minor_start;
-	if ((line < 0) || (line >= NR_PORTS)) {
-		MOD_DEC_USE_COUNT; 
-		return -ENODEV;
-	}
-	retval = get_async_struct(line, &info);
-	if (retval) {
-		MOD_DEC_USE_COUNT;
-		return retval;
-	}
-        tty->driver_data = info;
-        info->tty = tty;
-	if (serial_paranoia_check(info, tty->device, "rs_open")) {
-	        /* MOD_DEC_USE_COUNT; "info->tty" will cause this */ 
-		return -ENODEV;
-	}
-
-#ifdef SERIAL_DEBUG_OPEN
-	baget_printk("rs_open %s%d, count = %d\n", 
-		     tty->driver.name, info->line,
-		     info->state->count);
-#endif
-	info->tty->low_latency = (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
-
-	if (!tmp_buf) {
-		page = get_free_page(GFP_KERNEL);
-		if (!page) {
-			/* MOD_DEC_USE_COUNT; "info->tty" will cause this */
-			return -ENOMEM;
-		}
-		if (tmp_buf)
-			free_page(page);
-		else
-			tmp_buf = (unsigned char *) page;
-	}
-
-	/*
-	 * If the port is the middle of closing, bail out now
-	 */
-	if (tty_hung_up_p(filp) ||
-	    (info->flags & ASYNC_CLOSING)) {
-		if (info->flags & ASYNC_CLOSING)
-			interruptible_sleep_on(&info->close_wait);
-		/* MOD_DEC_USE_COUNT; "info->tty" will cause this */
-#ifdef SERIAL_DO_RESTART
-		return ((info->flags & ASYNC_HUP_NOTIFY) ?
-			-EAGAIN : -ERESTARTSYS);
-#else
-		return -EAGAIN;
-#endif
-	}
-
-	/*
-	 * Start up serial port
-	 */
-	retval = startup(info);
-	if (retval) {
-		/* MOD_DEC_USE_COUNT; "info->tty" will cause this */
-		return retval;
-	}
-
-	retval = block_til_ready(tty, filp, info);
-	if (retval) {
-		 /* MOD_DEC_USE_COUNT; "info->tty" will cause this */
-#ifdef SERIAL_DEBUG_OPEN
-		 baget_printk("rs_open returning after block_til_ready "
-			      "with %d\n",
-			      retval);
-#endif
-		 return retval;
-	}
-
-	if ((info->state->count == 1) &&
-	    (info->flags & ASYNC_SPLIT_TERMIOS)) {
-		if (tty->driver.subtype == SERIAL_TYPE_NORMAL)
-			*tty->termios = info->state->normal_termios;
-		else 
-			*tty->termios = info->state->callout_termios;
-		change_speed(info);
-	}
-#ifdef CONFIG_SERIAL_CONSOLE
-	if (sercons.cflag && sercons.index == line) {
-		tty->termios->c_cflag = sercons.cflag;
-		sercons.cflag = 0;
-		change_speed(info);
-	}
-#endif
-	info->session = current->session;
-	info->pgrp = current->pgrp;
-
-#ifdef SERIAL_DEBUG_OPEN
-	baget_printk("rs_open ttys%d successful...", info->line);
-#endif
-	return 0;
-}
-
-/*
- * /proc fs routines....
- */
-
-static inline int line_info(char *buf, struct serial_state *state)
-{
-	struct async_struct *info = state->info, scr_info;
-	int	ret;
-
-	ret = sprintf(buf, "%d: uart:%s port:%X irq:%d",
-		      state->line, uart_config[state->type].name, 
-		      state->port, state->irq);
-
-	if (!state->port || (state->type == PORT_UNKNOWN)) {
-		ret += sprintf(buf+ret, "\n");
-		return ret;
-	}
-
-	/*
-	 * Figure out the current RS-232 lines
-	 */
-	if (!info) {
-		info = &scr_info;	/* This is just for serial_{in,out} */
-
-		info->magic = SERIAL_MAGIC;
-		info->port = state->port;
-		info->flags = state->flags;
-		info->quot = 0;
-		info->tty = 0;
-	}
-	
-	if (info->quot) {
-		ret += sprintf(buf+ret, " baud:%d",
-			       state->baud_base / info->quot);
-	}
-
-	ret += sprintf(buf+ret, " tx:%d rx:%d",
-		      state->icount.tx, state->icount.rx);
-
-	if (state->icount.frame)
-		ret += sprintf(buf+ret, " fe:%d", state->icount.frame);
-	
-	if (state->icount.parity)
-		ret += sprintf(buf+ret, " pe:%d", state->icount.parity);
-	
-	if (state->icount.brk)
-		ret += sprintf(buf+ret, " brk:%d", state->icount.brk);	
-
-	if (state->icount.overrun)
-		ret += sprintf(buf+ret, " oe:%d", state->icount.overrun);
-
-	return ret;
-}
-
-int rs_read_proc(char *page, char **start, off_t off, int count,
-		 int *eof, void *data)
-{
-	int i, len = 0, l;
-	off_t	begin = 0;
-
-	len += sprintf(page, "serinfo:1.0 driver:%s\n", serial_version);
-	for (i = 0; i < NR_PORTS && len < 4000; i++) {
-                l = line_info(page + len, &rs_table[i]);
-                len += l;
- 		if (len+begin > off+count)
-			goto done;
-		if (len+begin < off) {
-			begin += len;
-			len = 0;
-		}
-	}
-	*eof = 1;
-done:
-	if (off >= len+begin)
-		return 0;
-	*start = page + (off-begin);
-	return ((count < begin+len-off) ? count : begin+len-off);
-}
-
-/*
- * ---------------------------------------------------------------------
- * rs_init() and friends
- *
- * rs_init() is called at boot-time to initialize the serial driver.
- * ---------------------------------------------------------------------
- */
-
-/*
- * This routine prints out the appropriate serial driver version
- * number, and identifies which options were configured into this
- * driver.
- */
-static _INLINE_ void show_serial_version(void)
-{
- 	printk(KERN_INFO "%s version %s with", serial_name, serial_version);
-#ifdef CONFIG_SERIAL_SHARE_IRQ
-	printk(" SHARE_IRQ");
-#endif
-#define SERIAL_OPT
-#ifdef CONFIG_SERIAL_DETECT_IRQ
-	printk(" DETECT_IRQ");
-#endif
-#ifdef SERIAL_OPT
-	printk(" enabled\n");
-#else
-	printk(" no serial options enabled\n");
-#endif
-#undef SERIAL_OPT
-}
-
-
-/*
- * This routine is called by rs_init() to initialize a specific serial
- * port.  It determines what type of UART chip this serial port is
- * using: 8250, 16450, 16550, 16550A.  The important question is
- * whether or not this UART is a 16550A or not, since this will
- * determine whether or not we can use its FIFO features or not.
- */
-
-/*
- *  Functionality of this function is reduced: we already know we have a VAC,
- *  but still need to perform some important actions (see code :-).
- */
-static void autoconfig(struct serial_state * state)
-{
-	struct async_struct *info, scr_info; 
-	unsigned long flags;
-
-	/* Setting up important parameters */
-	state->type = VAC_UART_TYPE;
-	state->xmit_fifo_size = uart_config[state->type].dfl_xmit_fifo_size;
-
-	info = &scr_info;       /* This is just for serial_{in,out} */   
-
-	info->magic = SERIAL_MAGIC;
-        info->port  = state->port;
-        info->flags = state->flags;
-
-        save_flags(flags); cli();
-
-	/* + Flush VAC input fifo */ 
-        (void)serial_in(info, VAC_UART_RX);
-        (void)serial_in(info, VAC_UART_RX);
-        (void)serial_in(info, VAC_UART_RX);
-        (void)serial_in(info, VAC_UART_RX);
-
-	/* Disable interrupts */
-        serial_outp(info, VAC_UART_INT_MASK, 0);
-
-        restore_flags(flags);
-}
-
-int register_serial(struct serial_struct *req);
-void unregister_serial(int line);
-
-EXPORT_SYMBOL(register_serial);
-EXPORT_SYMBOL(unregister_serial);
-
-/*
- *  Important function for VAC UART check and reanimation.
- */
-
-static void rs_timer(unsigned long dummy)
-{
-        static unsigned long last_strobe = 0;
-        struct async_struct *info;
-        unsigned int    i;
-        unsigned long flags;
-
-        if ((jiffies - last_strobe) >= RS_STROBE_TIME) {
-                for (i=1; i < NR_IRQS; i++) {
-                        info = IRQ_ports[i];
-                        if (!info)
-                                continue;
-                        save_flags(flags); cli();
-#ifdef CONFIG_SERIAL_SHARE_IRQ
-                        if (info->next_port) {
-                                do {
-                                        serial_out(info, VAC_UART_INT_MASK, 0);
-                                        info->IER |= VAC_UART_INT_TX_EMPTY;
-                                        serial_out(info, VAC_UART_INT_MASK, 
-						   info->IER);
-                                        info = info->next_port;
-                                } while (info);
-				rs_interrupt(i, NULL, NULL);
-                        } else
-#endif /* CONFIG_SERIAL_SHARE_IRQ */
-                                rs_interrupt_single(i, NULL, NULL);
-                        restore_flags(flags);
-                }
-        }
-        last_strobe = jiffies;
-        mod_timer(&vacs_timer, jiffies + RS_STROBE_TIME);
-
-	/*
-	 *  It looks this code for case we share IRQ with console...
-	 */
-
-        if (IRQ_ports[0]) {
-                save_flags(flags); cli();
-#ifdef CONFIG_SERIAL_SHARE_IRQ
-                rs_interrupt(0, NULL, NULL);
-#else
-                rs_interrupt_single(0, NULL, NULL);
-#endif
-                restore_flags(flags);
-
-                mod_timer(&vacs_timer, jiffies + IRQ_timeout[0] - 2);
-        }
-}
- 
-/*
- * The serial driver boot-time initialization code!
- */
-int __init rs_init(void)
-{
-	int i;
-	struct serial_state * state;
-	extern void atomwide_serial_init (void);
-	extern void dualsp_serial_init (void);
-
-#ifdef CONFIG_ATOMWIDE_SERIAL
-	atomwide_serial_init ();
-#endif
-#ifdef CONFIG_DUALSP_SERIAL
-	dualsp_serial_init ();
-#endif
-
-	init_bh(SERIAL_BH, do_serial_bh);
-	init_timer(&vacs_timer);
-	vacs_timer.function = rs_timer;
-	vacs_timer.expires = 0;
-
-	for (i = 0; i < NR_IRQS; i++) {
-		IRQ_ports[i] = 0;
-		IRQ_timeout[i] = 0;
-	}
-
-
-/*
- *  It is not a good idea to share interrupts with console,
- *  but it looks we cannot avoid it.
- */
-#if 0 
-
-#ifdef CONFIG_SERIAL_CONSOLE
-	/*
-	 *	The interrupt of the serial console port
-	 *	can't be shared.
-	 */
-	if (sercons.flags & CON_CONSDEV) {
-		for(i = 0; i < NR_PORTS; i++)
-			if (i != sercons.index &&
-			    rs_table[i].irq == rs_table[sercons.index].irq)
-				rs_table[i].irq = 0;
-	}
-#endif
-
-#endif
-	show_serial_version();
-
-	/* Initialize the tty_driver structure */
-	
-	memset(&serial_driver, 0, sizeof(struct tty_driver));
-	serial_driver.magic = TTY_DRIVER_MAGIC;
-	serial_driver.driver_name = "serial";
-	serial_driver.name = "ttyS";
-	serial_driver.major = TTY_MAJOR;
-	serial_driver.minor_start = 64;
-	serial_driver.num = NR_PORTS;
-	serial_driver.type = TTY_DRIVER_TYPE_SERIAL;
-	serial_driver.subtype = SERIAL_TYPE_NORMAL;
-	serial_driver.init_termios = tty_std_termios;
-	serial_driver.init_termios.c_cflag =
-		B9600 | CS8 | CREAD | HUPCL | CLOCAL;
-	serial_driver.flags = TTY_DRIVER_REAL_RAW;
-	serial_driver.refcount = &serial_refcount;
-	serial_driver.table = serial_table;
-	serial_driver.termios = serial_termios;
-	serial_driver.termios_locked = serial_termios_locked;
-
-	serial_driver.open = rs_open;
-	serial_driver.close = rs_close;
-	serial_driver.write = rs_write;
-	serial_driver.put_char = rs_put_char;
-	serial_driver.flush_chars = rs_flush_chars;
-	serial_driver.write_room = rs_write_room;
-	serial_driver.chars_in_buffer = rs_chars_in_buffer;
-	serial_driver.flush_buffer = rs_flush_buffer;
-	serial_driver.ioctl = rs_ioctl;
-	serial_driver.throttle = rs_throttle;
-	serial_driver.unthrottle = rs_unthrottle;
-	serial_driver.send_xchar = rs_send_xchar;
-	serial_driver.set_termios = rs_set_termios;
-	serial_driver.stop = rs_stop;
-	serial_driver.start = rs_start;
-	serial_driver.hangup = rs_hangup;
-	serial_driver.break_ctl = rs_break;
-	serial_driver.wait_until_sent = rs_wait_until_sent;
-	serial_driver.read_proc = rs_read_proc;
-	
-	/*
-	 * The callout device is just like normal device except for
-	 * major number and the subtype code.
-	 */
-	callout_driver = serial_driver;
-	callout_driver.name = "cua";
-	callout_driver.major = TTYAUX_MAJOR;
-	callout_driver.subtype = SERIAL_TYPE_CALLOUT;
-	callout_driver.read_proc = 0;
-	callout_driver.proc_entry = 0;
-
-	if (tty_register_driver(&serial_driver))
-		panic("Couldn't register serial driver");
-	if (tty_register_driver(&callout_driver))
-		panic("Couldn't register callout driver");
-	
-	for (i = 0, state = rs_table; i < NR_PORTS; i++,state++) {
-		state->magic = SSTATE_MAGIC;
-		state->line = i;
-		state->type = PORT_UNKNOWN;
-		state->custom_divisor = 0;
-		state->close_delay = 5*HZ/10;
-		state->closing_wait = 30*HZ;
-		state->callout_termios = callout_driver.init_termios;
-		state->normal_termios = serial_driver.init_termios;
-		state->icount.cts = state->icount.dsr = 
-			state->icount.rng = state->icount.dcd = 0;
-		state->icount.rx = state->icount.tx = 0;
-		state->icount.frame = state->icount.parity = 0;
-		state->icount.overrun = state->icount.brk = 0;
-		state->irq = state->irq;
-		if (check_region(state->port,8))
-			continue;
-	        if (state->flags & ASYNC_BOOT_AUTOCONF)
- 			autoconfig(state);
-	}
-
-	/*
-	 * Detect the IRQ only once every port is initialised,
-	 * because some 16450 do not reset to 0 the MCR register.
-	 */
-	for (i = 0, state = rs_table; i < NR_PORTS; i++,state++) {
-		if (state->type == PORT_UNKNOWN)
-			continue;
-		printk(KERN_INFO "ttyS%02d%s at 0x%04x (irq = %d) is a %s\n",
-		       state->line,
-		       (state->flags & ASYNC_FOURPORT) ? " FourPort" : "",
-		       state->port, state->irq,
-		       uart_config[state->type].name);
-	}
-	return 0;
-}
-
-/*
- * register_serial and unregister_serial allows for serial ports to be
- * configured at run-time, to support PCMCIA modems.
- */
-int register_serial(struct serial_struct *req)
-{
-	int i;
-	unsigned long flags;
-	struct serial_state *state;
-
-	save_flags(flags);
-	cli();
-	for (i = 0; i < NR_PORTS; i++) {
-		if (rs_table[i].port == req->port)
-			break;
-	}
-	if (i == NR_PORTS) {
-		for (i = 0; i < NR_PORTS; i++)
-			if ((rs_table[i].type == PORT_UNKNOWN) &&
-			    (rs_table[i].count == 0))
-				break;
-	}
-	if (i == NR_PORTS) {
-		restore_flags(flags);
-		return -1;
-	}
-	state = &rs_table[i];
-	if (rs_table[i].count) {
-		restore_flags(flags);
-		printk("Couldn't configure serial #%d (port=%d,irq=%d): "
-		       "device already open\n", i, req->port, req->irq);
-		return -1;
-	}
-	state->irq = req->irq;
-	state->port = req->port;
-	state->flags = req->flags;
-
-	autoconfig(state);
-	if (state->type == PORT_UNKNOWN) {
-		restore_flags(flags);
-		printk("register_serial(): autoconfig failed\n");
-		return -1;
-	}
-	restore_flags(flags);
-
-	printk(KERN_INFO "tty%02d at 0x%04x (irq = %d) is a %s\n",
-	       state->line, state->port, state->irq,
-	       uart_config[state->type].name);
-	return state->line;
-}
-
-void unregister_serial(int line)
-{
-	unsigned long flags;
-	struct serial_state *state = &rs_table[line];
-
-	save_flags(flags);
-	cli();
-	if (state->info && state->info->tty)
-		tty_hangup(state->info->tty);
-	state->type = PORT_UNKNOWN;
-	printk(KERN_INFO "tty%02d unloaded\n", state->line);
-	restore_flags(flags);
-}
-
-#ifdef MODULE
-int init_module(void)
-{
-	return rs_init();
-}
-
-void cleanup_module(void) 
-{
-	unsigned long flags;
-	int e1, e2;
-	int i;
-
-	printk("Unloading %s: version %s\n", serial_name, serial_version); 
-	save_flags(flags);
-	cli();
-
-	del_timer_sync(&vacs_timer);
-        remove_bh(SERIAL_BH);
-
-	if ((e1 = tty_unregister_driver(&serial_driver)))
-		printk("SERIAL: failed to unregister serial driver (%d)\n",
-		       e1);
-	if ((e2 = tty_unregister_driver(&callout_driver)))
-		printk("SERIAL: failed to unregister callout driver (%d)\n", 
-		       e2);
-	restore_flags(flags);
-
-	for (i = 0; i < NR_PORTS; i++) {
-		if (rs_table[i].type != PORT_UNKNOWN)
-			release_region(rs_table[i].port, 8);
-	}
-	if (tmp_buf) {
-		free_page((unsigned long) tmp_buf);
-		tmp_buf = NULL;
-	}
-}
-#endif /* MODULE */
-
-
-/*
- * ------------------------------------------------------------
- * Serial console driver
- * ------------------------------------------------------------
- */
-#ifdef CONFIG_SERIAL_CONSOLE
-
-#define BOTH_EMPTY (VAC_UART_STATUS_TX_EMPTY | VAC_UART_STATUS_TX_EMPTY)
-
-/*
- *	Wait for transmitter & holding register to empty
- */
-static inline void wait_for_xmitr(struct async_struct *info)
-{
-	int lsr;
-	unsigned int tmout = 1000000;
-
-	do {
-		lsr = serial_inp(info, VAC_UART_INT_STATUS);
-		if (--tmout == 0) break;
-	} while ((lsr & BOTH_EMPTY) != BOTH_EMPTY);
-}
-
-/*
- *	Print a string to the serial port trying not to disturb
- *	any possible real use of the port...
- */
-static void serial_console_write(struct console *co, const char *s,
-				unsigned count)
-{
-	struct serial_state *ser;
-	int ier;
-	unsigned i;
-	struct async_struct scr_info; /* serial_{in,out} because HUB6 */
-
-	ser = rs_table + co->index;
-	scr_info.magic = SERIAL_MAGIC;
-	scr_info.port = ser->port;
-	scr_info.flags = ser->flags;
-
-	/*
-	 *	First save the IER then disable the interrupts
-	 */
-	ier = serial_inp(&scr_info, VAC_UART_INT_MASK);
-	serial_outw(&scr_info, VAC_UART_INT_MASK, 0x00);
-
-	/*
-	 *	Now, do each character
-	 */
-	for (i = 0; i < count; i++, s++) {
-		wait_for_xmitr(&scr_info);
-
-		/*
-		 *	Send the character out.
-		 *	If a LF, also do CR...
-		 */
-		serial_outp(&scr_info, VAC_UART_TX, (unsigned short)*s << 8);
-		if (*s == 10) {
-			wait_for_xmitr(&scr_info);
-			serial_outp(&scr_info, VAC_UART_TX, 13 << 8);
-		}
-	}
-
-	/*
-	 *	Finally, Wait for transmitter & holding register to empty
-	 * 	and restore the IER
-	 */
-	wait_for_xmitr(&scr_info);
-	serial_outp(&scr_info, VAC_UART_INT_MASK, ier);
-}
-
-static kdev_t serial_console_device(struct console *c)
-{
-	return MKDEV(TTY_MAJOR, 64 + c->index);
-}
-
-/*
- *	Setup initial baud/bits/parity. We do two things here:
- *	- construct a cflag setting for the first rs_open()
- *	- initialize the serial port
- *	Return non-zero if we didn't find a serial port.
- */
-static int __init serial_console_setup(struct console *co, char *options)
-{
-	struct serial_state *ser;
-	unsigned cval;
-	int	baud = 9600;
-	int	bits = 8;
-	int	parity = 'n';
-	int	cflag = CREAD | HUPCL | CLOCAL;
-	int	quot = 0;
-	char	*s;
-	struct async_struct scr_info; /* serial_{in,out} because HUB6 */
-
-	if (options) {
-		baud = simple_strtoul(options, NULL, 10);
-		s = options;
-		while(*s >= '0' && *s <= '9')
-			s++;
-		if (*s) parity = *s++;
-		if (*s) bits   = *s - '0';
-	}
-
-	/*
-	 *	Now construct a cflag setting.
-	 */
-	switch(baud) {
-		case 1200:
-			cflag |= B1200;
-			break;
-		case 2400:
-			cflag |= B2400;
-			break;
-		case 4800:
-			cflag |= B4800;
-			break;
-		case 19200:
-			cflag |= B19200;
-			break;
-		case 38400:
-			cflag |= B38400;
-			break;
-		case 57600:
-			cflag |= B57600;
-			break;
-		case 115200:
-			cflag |= B115200;
-			break;
-		case 9600:
-		default:
-			cflag |= B9600;
-			break;
-	}
-	switch(bits) {
-		case 7:
-			cflag |= CS7;
-			break;
-		default:
-		case 8:
-			cflag |= CS8;
-			break;
-	}
-	switch(parity) {
-		case 'o': case 'O':
-			cflag |= PARODD;
-			break;
-		case 'e': case 'E':
-			cflag |= PARENB;
-			break;
-	}
-	co->cflag = cflag;
-
-	/*
-	 *	Divisor, bytesize and parity
-	 */
-	ser = rs_table + co->index;
-	scr_info.magic = SERIAL_MAGIC;
-	scr_info.port = ser->port;
-	scr_info.flags = ser->flags;
-
-	quot = ser->baud_base / baud;
-	cval = cflag & (CSIZE | CSTOPB);
-
-	cval >>= 4;
-
-	cval &= ~VAC_UART_MODE_PARITY_ENABLE;
-	if (cflag & PARENB)
-		cval |= VAC_UART_MODE_PARITY_ENABLE;
-	if (cflag & PARODD)
-		cval |= VAC_UART_MODE_PARITY_ODD;
-
-	/*
-	 *	Disable UART interrupts, set DTR and RTS high
-	 *	and set speed.
-	 */
-	switch (baud) {
-	default:
-	case 9600:
-		cval |= VAC_UART_MODE_BAUD(7);
-		break;
-	case 4800:
-		cval |= VAC_UART_MODE_BAUD(6);
-		break;
-	case 2400:
-		cval |= VAC_UART_MODE_BAUD(5);
-		break;
-	case 1200:
-		cval |= VAC_UART_MODE_BAUD(4);
-		break;
-	case 600:
-		cval |= VAC_UART_MODE_BAUD(3);
-		break;
-	case 300:
-		cval |= VAC_UART_MODE_BAUD(2);
-		break;
-#ifndef QUAD_UART_SPEED
-	case 150:
-#else
-	case 38400:
-#endif
-		cval |= VAC_UART_MODE_BAUD(1);
-		break;
-#ifndef QUAD_UART_SPEED
-	case 75:
-#else
-	case 19200:
-#endif
-		cval |= VAC_UART_MODE_BAUD(0);
-		break;
-	}
-
-	/* Baget VAC need some adjustments for computed value */
-	cval = vac_uart_mode_fixup(cval);
-
-        serial_outp(&scr_info, VAC_UART_MODE, cval);  
-	serial_outp(&scr_info, VAC_UART_INT_MASK, 0);
-
-	return 0;
-}
-
-static struct console sercons = {
-	name:		"ttyS",
-	write:		serial_console_write,
-	device:		serial_console_device,
-	setup:		serial_console_setup,
-	flags:		CON_PRINTBUFFER,
-	index:		-1,
-};
-
-/*
- *	Register console.
- */
-long __init serial_console_init(long kmem_start, long kmem_end)
-{
-	register_console(&sercons);
-	return kmem_start;
-}
-#endif
-
-#ifdef CONFIG_REMOTE_DEBUG
-#undef PRINT_DEBUG_PORT_INFO
-
-/*
- * This is the interface to the remote debugger stub.
- * I've put that here to be able to control the serial
- * device more directly.
- */
-
-static int initialized;
-
-static int rs_debug_init(struct async_struct *info)
-{
-	int quot;
-
-	autoconfig(info);	/* autoconfigure ttyS0, whatever that is */
-
-#ifdef PRINT_DEBUG_PORT_INFO
-	baget_printk("kgdb debug interface:: tty%02d at 0x%04x", 
-		     info->line, info->port);
-	switch (info->type) {
-		case PORT_8250:
-			baget_printk(" is a 8250\n");
-			break;
-		case PORT_16450:
-			baget_printk(" is a 16450\n");
-			break;
-		case PORT_16550:
-			baget_printk(" is a 16550\n");
-			break;
-		case PORT_16550A:
-			baget_printk(" is a 16550A\n");
-			break;
-		case PORT_16650:
-			baget_printk(" is a 16650\n");
-			break;
-		default:
-			baget_printk(" is of unknown type -- unusable\n");
-			break;
-	}
-#endif
-	
-	if (info->port == PORT_UNKNOWN)
-		return -1;
-
-	/*
-	 * Clear all interrupts
-	 */
-
-	(void)serial_inp(info, VAC_UART_INT_STATUS);
-	(void)serial_inp(info, VAC_UART_RX);
-
-	/*
-	 * Now, initialize the UART 
-	 */
-	serial_outp(info,VAC_UART_MODE,VAC_UART_MODE_INITIAL); /* reset DLAB */
-	if (info->flags & ASYNC_FOURPORT) {
-		info->MCR = UART_MCR_DTR | UART_MCR_RTS;
-		info->MCR_noint = UART_MCR_DTR | UART_MCR_OUT1;
-	} else {
-		info->MCR = UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2;
-		info->MCR_noint = UART_MCR_DTR | UART_MCR_RTS;
-	}
-
-	info->MCR = info->MCR_noint;	     /* no interrupts, please */
-	/*
-	 * and set the speed of the serial port
-	 * (currently hardwired to 9600 8N1
-	 */
-
-	quot = info->baud_base / 9600;	     /* baud rate is fixed to 9600 */
-	/* FIXME: if rs_debug interface is needed, we need to set speed here */
-
-	return 0;
-}
-
-int putDebugChar(char c)
-{
-	struct async_struct *info = rs_table;
-
-	if (!initialized) { 		/* need to init device first */
-		if (rs_debug_init(info) == 0)
-			initialized = 1;
-		else
-			return 0;
-	}
-
-	while ((serial_inw(info, VAC_UART_INT_STATUS) & \
-                VAC_UART_STATUS_TX_EMPTY) == 0)
-		;
-	serial_out(info, VAC_UART_TX, (unsigned short)c << 8);
-
-	return 1;
-}
-
-char getDebugChar(void)
-{
-	struct async_struct *info = rs_table;
-
-	if (!initialized) { 		/* need to init device first */
-		if (rs_debug_init(info) == 0)
-			initialized = 1;
-		else
-			return 0;
-	}
-	while (!(serial_inw(info, VAC_UART_INT_STATUS) & \
-		 VAC_UART_STATUS_RX_READY))
-		;
-
-	return(serial_inp(info, VAC_UART_RX));
-}
-
-#endif /* CONFIG_REMOTE_DEBUG */

FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)