tty: move a number of tty drivers from drivers/char/ to drivers/tty/

As planned by Arnd Bergmann, this moves the following drivers from
drivers/char/ to drivers/tty/ as that's where they really belong:
	amiserial
	nozomi
	synclink
	rocket
	cyclades
	moxa
	mxser
	isicom
	bfin_jtag_comm

Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 0 insertions, 2178 deletions

diff --git a/drivers/char/amiserial.c b/drivers/char/amiserial.c
deleted file mode 100644
index f214e502247..00000000000
--- a/drivers/char/amiserial.c
+++ /dev/null
@@ -1,2178 +0,0 @@
-/*
- *  linux/drivers/char/amiserial.c
- *
- * Serial driver for the amiga builtin port.
- *
- * This code was created by taking serial.c version 4.30 from kernel
- * release 2.3.22, replacing all hardware related stuff with the
- * corresponding amiga hardware actions, and removing all irrelevant
- * code. As a consequence, it uses many of the constants and names
- * associated with the registers and bits of 16550 compatible UARTS -
- * but only to keep track of status, etc in the state variables. It
- * was done this was to make it easier to keep the code in line with
- * (non hardware specific) changes to serial.c.
- *
- * The port is registered with the tty driver as minor device 64, and
- * therefore other ports should should only use 65 upwards.
- *
- * Richard Lucock 28/12/99
- *
- *  Copyright (C) 1991, 1992  Linus Torvalds
- *  Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 
- * 		1998, 1999  Theodore Ts'o
- *
- */
-
-/*
- * Serial driver configuration section.  Here are the various options:
- *
- * SERIAL_PARANOIA_CHECK
- * 		Check the magic number for the async_structure where
- * 		ever possible.
- */
-
-#include <linux/delay.h>
-
-#undef SERIAL_PARANOIA_CHECK
-#define SERIAL_DO_RESTART
-
-/* Set of debugging defines */
-
-#undef SERIAL_DEBUG_INTR
-#undef SERIAL_DEBUG_OPEN
-#undef SERIAL_DEBUG_FLOW
-#undef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
-
-/* Sanity checks */
-
-#if defined(MODULE) && defined(SERIAL_DEBUG_MCOUNT)
-#define DBG_CNT(s) printk("(%s): [%x] refc=%d, serc=%d, ttyc=%d -> %s\n", \
- tty->name, (info->flags), serial_driver->refcount,info->count,tty->count,s)
-#else
-#define DBG_CNT(s)
-#endif
-
-/*
- * End of serial driver configuration section.
- */
-
-#include <linux/module.h>
-
-#include <linux/types.h>
-#include <linux/serial.h>
-#include <linux/serialP.h>
-#include <linux/serial_reg.h>
-static char *serial_version = "4.30";
-
-#include <linux/errno.h>
-#include <linux/signal.h>
-#include <linux/sched.h>
-#include <linux/kernel.h>
-#include <linux/timer.h>
-#include <linux/interrupt.h>
-#include <linux/tty.h>
-#include <linux/tty_flip.h>
-#include <linux/console.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/seq_file.h>
-#include <linux/slab.h>
-#include <linux/init.h>
-#include <linux/bitops.h>
-#include <linux/platform_device.h>
-
-#include <asm/setup.h>
-
-#include <asm/system.h>
-
-#include <asm/irq.h>
-
-#include <asm/amigahw.h>
-#include <asm/amigaints.h>
-
-#define custom amiga_custom
-static char *serial_name = "Amiga-builtin serial driver";
-
-static struct tty_driver *serial_driver;
-
-/* number of characters left in xmit buffer before we ask for more */
-#define WAKEUP_CHARS 256
-
-static struct async_struct *IRQ_ports;
-
-static unsigned char current_ctl_bits;
-
-static void change_speed(struct async_struct *info, struct ktermios *old);
-static void rs_wait_until_sent(struct tty_struct *tty, int timeout);
-
-
-static struct serial_state rs_table[1];
-
-#define NR_PORTS ARRAY_SIZE(rs_table)
-
-#include <asm/uaccess.h>
-
-#define serial_isroot()	(capable(CAP_SYS_ADMIN))
-
-
-static inline int serial_paranoia_check(struct async_struct *info,
-					char *name, 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, name, routine);
-		return 1;
-	}
-	if (info->magic != SERIAL_MAGIC) {
-		printk(badmagic, name, routine);
-		return 1;
-	}
-#endif
-	return 0;
-}
-
-/* some serial hardware definitions */
-#define SDR_OVRUN   (1<<15)
-#define SDR_RBF     (1<<14)
-#define SDR_TBE     (1<<13)
-#define SDR_TSRE    (1<<12)
-
-#define SERPER_PARENB    (1<<15)
-
-#define AC_SETCLR   (1<<15)
-#define AC_UARTBRK  (1<<11)
-
-#define SER_DTR     (1<<7)
-#define SER_RTS     (1<<6)
-#define SER_DCD     (1<<5)
-#define SER_CTS     (1<<4)
-#define SER_DSR     (1<<3)
-
-static __inline__ void rtsdtr_ctrl(int bits)
-{
-    ciab.pra = ((bits & (SER_RTS | SER_DTR)) ^ (SER_RTS | SER_DTR)) | (ciab.pra & ~(SER_RTS | SER_DTR));
-}
-
-/*
- * ------------------------------------------------------------
- * 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 = tty->driver_data;
-	unsigned long flags;
-
-	if (serial_paranoia_check(info, tty->name, "rs_stop"))
-		return;
-
-	local_irq_save(flags);
-	if (info->IER & UART_IER_THRI) {
-		info->IER &= ~UART_IER_THRI;
-		/* disable Tx interrupt and remove any pending interrupts */
-		custom.intena = IF_TBE;
-		mb();
-		custom.intreq = IF_TBE;
-		mb();
-	}
-	local_irq_restore(flags);
-}
-
-static void rs_start(struct tty_struct *tty)
-{
-	struct async_struct *info = tty->driver_data;
-	unsigned long flags;
-
-	if (serial_paranoia_check(info, tty->name, "rs_start"))
-		return;
-
-	local_irq_save(flags);
-	if (info->xmit.head != info->xmit.tail
-	    && info->xmit.buf
-	    && !(info->IER & UART_IER_THRI)) {
-		info->IER |= UART_IER_THRI;
-		custom.intena = IF_SETCLR | IF_TBE;
-		mb();
-		/* set a pending Tx Interrupt, transmitter should restart now */
-		custom.intreq = IF_SETCLR | IF_TBE;
-		mb();
-	}
-	local_irq_restore(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 void rs_sched_event(struct async_struct *info,
-			   int event)
-{
-	info->event |= 1 << event;
-	tasklet_schedule(&info->tlet);
-}
-
-static void receive_chars(struct async_struct *info)
-{
-        int status;
-	int serdatr;
-	struct tty_struct *tty = info->tty;
-	unsigned char ch, flag;
-	struct	async_icount *icount;
-	int oe = 0;
-
-	icount = &info->state->icount;
-
-	status = UART_LSR_DR; /* We obviously have a character! */
-	serdatr = custom.serdatr;
-	mb();
-	custom.intreq = IF_RBF;
-	mb();
-
-	if((serdatr & 0x1ff) == 0)
-	    status |= UART_LSR_BI;
-	if(serdatr & SDR_OVRUN)
-	    status |= UART_LSR_OE;
-
-	ch = serdatr & 0xff;
-	icount->rx++;
-
-#ifdef SERIAL_DEBUG_INTR
-	printk("DR%02x:%02x...", ch, status);
-#endif
-	flag = TTY_NORMAL;
-
-	/*
-	 * We don't handle parity or frame errors - but I have left
-	 * the code in, since I'm not sure that the errors can't be
-	 * detected.
-	 */
-
-	if (status & (UART_LSR_BI | UART_LSR_PE |
-		      UART_LSR_FE | UART_LSR_OE)) {
-	  /*
-	   * For statistics only
-	   */
-	  if (status & UART_LSR_BI) {
-	    status &= ~(UART_LSR_FE | UART_LSR_PE);
-	    icount->brk++;
-	  } else if (status & UART_LSR_PE)
-	    icount->parity++;
-	  else if (status & UART_LSR_FE)
-	    icount->frame++;
-	  if (status & UART_LSR_OE)
-	    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)
-	    goto out;
-
-	  status &= info->read_status_mask;
-
-	  if (status & (UART_LSR_BI)) {
-#ifdef SERIAL_DEBUG_INTR
-	    printk("handling break....");
-#endif
-	    flag = TTY_BREAK;
-	    if (info->flags & ASYNC_SAK)
-	      do_SAK(tty);
-	  } else if (status & UART_LSR_PE)
-	    flag = TTY_PARITY;
-	  else if (status & UART_LSR_FE)
-	    flag = TTY_FRAME;
-	  if (status & UART_LSR_OE) {
-	    /*
-	     * Overrun is special, since it's
-	     * reported immediately, and doesn't
-	     * affect the current character
-	     */
-	     oe = 1;
-	  }
-	}
-	tty_insert_flip_char(tty, ch, flag);
-	if (oe == 1)
-		tty_insert_flip_char(tty, 0, TTY_OVERRUN);
-	tty_flip_buffer_push(tty);
-out:
-	return;
-}
-
-static void transmit_chars(struct async_struct *info)
-{
-	custom.intreq = IF_TBE;
-	mb();
-	if (info->x_char) {
-	        custom.serdat = info->x_char | 0x100;
-		mb();
-		info->state->icount.tx++;
-		info->x_char = 0;
-		return;
-	}
-	if (info->xmit.head == info->xmit.tail
-	    || info->tty->stopped
-	    || info->tty->hw_stopped) {
-		info->IER &= ~UART_IER_THRI;
-	        custom.intena = IF_TBE;
-		mb();
-		return;
-	}
-
-	custom.serdat = info->xmit.buf[info->xmit.tail++] | 0x100;
-	mb();
-	info->xmit.tail = info->xmit.tail & (SERIAL_XMIT_SIZE-1);
-	info->state->icount.tx++;
-
-	if (CIRC_CNT(info->xmit.head,
-		     info->xmit.tail,
-		     SERIAL_XMIT_SIZE) < WAKEUP_CHARS)
-		rs_sched_event(info, RS_EVENT_WRITE_WAKEUP);
-
-#ifdef SERIAL_DEBUG_INTR
-	printk("THRE...");
-#endif
-	if (info->xmit.head == info->xmit.tail) {
-	        custom.intena = IF_TBE;
-		mb();
-		info->IER &= ~UART_IER_THRI;
-	}
-}
-
-static void check_modem_status(struct async_struct *info)
-{
-	unsigned char status = ciab.pra & (SER_DCD | SER_CTS | SER_DSR);
-	unsigned char dstatus;
-	struct	async_icount *icount;
-
-	/* Determine bits that have changed */
-	dstatus = status ^ current_ctl_bits;
-	current_ctl_bits = status;
-
-	if (dstatus) {
-		icount = &info->state->icount;
-		/* update input line counters */
-		if (dstatus & SER_DSR)
-			icount->dsr++;
-		if (dstatus & SER_DCD) {
-			icount->dcd++;
-#ifdef CONFIG_HARD_PPS
-			if ((info->flags & ASYNC_HARDPPS_CD) &&
-			    !(status & SER_DCD))
-				hardpps();
-#endif
-		}
-		if (dstatus & SER_CTS)
-			icount->cts++;
-		wake_up_interruptible(&info->delta_msr_wait);
-	}
-
-	if ((info->flags & ASYNC_CHECK_CD) && (dstatus & SER_DCD)) {
-#if (defined(SERIAL_DEBUG_OPEN) || defined(SERIAL_DEBUG_INTR))
-		printk("ttyS%d CD now %s...", info->line,
-		       (!(status & SER_DCD)) ? "on" : "off");
-#endif
-		if (!(status & SER_DCD))
-			wake_up_interruptible(&info->open_wait);
-		else {
-#ifdef SERIAL_DEBUG_OPEN
-			printk("doing serial hangup...");
-#endif
-			if (info->tty)
-				tty_hangup(info->tty);
-		}
-	}
-	if (info->flags & ASYNC_CTS_FLOW) {
-		if (info->tty->hw_stopped) {
-			if (!(status & SER_CTS)) {
-#if (defined(SERIAL_DEBUG_INTR) || defined(SERIAL_DEBUG_FLOW))
-				printk("CTS tx start...");
-#endif
-				info->tty->hw_stopped = 0;
-				info->IER |= UART_IER_THRI;
-				custom.intena = IF_SETCLR | IF_TBE;
-				mb();
-				/* set a pending Tx Interrupt, transmitter should restart now */
-				custom.intreq = IF_SETCLR | IF_TBE;
-				mb();
-				rs_sched_event(info, RS_EVENT_WRITE_WAKEUP);
-				return;
-			}
-		} else {
-			if ((status & SER_CTS)) {
-#if (defined(SERIAL_DEBUG_INTR) || defined(SERIAL_DEBUG_FLOW))
-				printk("CTS tx stop...");
-#endif
-				info->tty->hw_stopped = 1;
-				info->IER &= ~UART_IER_THRI;
-				/* disable Tx interrupt and remove any pending interrupts */
-				custom.intena = IF_TBE;
-				mb();
-				custom.intreq = IF_TBE;
-				mb();
-			}
-		}
-	}
-}
-
-static irqreturn_t ser_vbl_int( int irq, void *data)
-{
-        /* vbl is just a periodic interrupt we tie into to update modem status */
-	struct async_struct * info = IRQ_ports;
-	/*
-	 * TBD - is it better to unregister from this interrupt or to
-	 * ignore it if MSI is clear ?
-	 */
-	if(info->IER & UART_IER_MSI)
-	  check_modem_status(info);
-	return IRQ_HANDLED;
-}
-
-static irqreturn_t ser_rx_int(int irq, void *dev_id)
-{
-	struct async_struct * info;
-
-#ifdef SERIAL_DEBUG_INTR
-	printk("ser_rx_int...");
-#endif
-
-	info = IRQ_ports;
-	if (!info || !info->tty)
-		return IRQ_NONE;
-
-	receive_chars(info);
-	info->last_active = jiffies;
-#ifdef SERIAL_DEBUG_INTR
-	printk("end.\n");
-#endif
-	return IRQ_HANDLED;
-}
-
-static irqreturn_t ser_tx_int(int irq, void *dev_id)
-{
-	struct async_struct * info;
-
-	if (custom.serdatr & SDR_TBE) {
-#ifdef SERIAL_DEBUG_INTR
-	  printk("ser_tx_int...");
-#endif
-
-	  info = IRQ_ports;
-	  if (!info || !info->tty)
-		return IRQ_NONE;
-
-	  transmit_chars(info);
-	  info->last_active = jiffies;
-#ifdef SERIAL_DEBUG_INTR
-	  printk("end.\n");
-#endif
-	}
-	return IRQ_HANDLED;
-}
-
-/*
- * -------------------------------------------------------------------
- * 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_softint(unsigned long 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))
-		tty_wakeup(tty);
-}
-
-/*
- * ---------------------------------------------------------------
- * 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.
- * ---------------------------------------------------------------
- */
-
-static int startup(struct async_struct * info)
-{
-	unsigned long flags;
-	int	retval=0;
-	unsigned long page;
-
-	page = get_zeroed_page(GFP_KERNEL);
-	if (!page)
-		return -ENOMEM;
-
-	local_irq_save(flags);
-
-	if (info->flags & ASYNC_INITIALIZED) {
-		free_page(page);
-		goto errout;
-	}
-
-	if (info->xmit.buf)
-		free_page(page);
-	else
-		info->xmit.buf = (unsigned char *) page;
-
-#ifdef SERIAL_DEBUG_OPEN
-	printk("starting up ttys%d ...", info->line);
-#endif
-
-	/* Clear anything in the input buffer */
-
-	custom.intreq = IF_RBF;
-	mb();
-
-	retval = request_irq(IRQ_AMIGA_VERTB, ser_vbl_int, 0, "serial status", info);
-	if (retval) {
-	  if (serial_isroot()) {
-	    if (info->tty)
-	      set_bit(TTY_IO_ERROR,
-		      &info->tty->flags);
-	    retval = 0;
-	  }
-	  goto errout;
-	}
-
-	/* enable both Rx and Tx interrupts */
-	custom.intena = IF_SETCLR | IF_RBF | IF_TBE;
-	mb();
-	info->IER = UART_IER_MSI;
-
-	/* remember current state of the DCD and CTS bits */
-	current_ctl_bits = ciab.pra & (SER_DCD | SER_CTS | SER_DSR);
-
-	IRQ_ports = info;
-
-	info->MCR = 0;
-	if (info->tty->termios->c_cflag & CBAUD)
-	  info->MCR = SER_DTR | SER_RTS;
-	rtsdtr_ctrl(info->MCR);
-
-	if (info->tty)
-		clear_bit(TTY_IO_ERROR, &info->tty->flags);
-	info->xmit.head = info->xmit.tail = 0;
-
-	/*
-	 * Set up the tty->alt_speed kludge
-	 */
-	if (info->tty) {
-		if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
-			info->tty->alt_speed = 57600;
-		if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
-			info->tty->alt_speed = 115200;
-		if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
-			info->tty->alt_speed = 230400;
-		if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
-			info->tty->alt_speed = 460800;
-	}
-
-	/*
-	 * and set the speed of the serial port
-	 */
-	change_speed(info, NULL);
-
-	info->flags |= ASYNC_INITIALIZED;
-	local_irq_restore(flags);
-	return 0;
-
-errout:
-	local_irq_restore(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;
-
-	if (!(info->flags & ASYNC_INITIALIZED))
-		return;
-
-	state = info->state;
-
-#ifdef SERIAL_DEBUG_OPEN
-	printk("Shutting down serial port %d ....\n", info->line);
-#endif
-
-	local_irq_save(flags); /* 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);
-
-	IRQ_ports = NULL;
-
-	/*
-	 * Free the IRQ, if necessary
-	 */
-	free_irq(IRQ_AMIGA_VERTB, info);
-
-	if (info->xmit.buf) {
-		free_page((unsigned long) info->xmit.buf);
-		info->xmit.buf = NULL;
-	}
-
-	info->IER = 0;
-	custom.intena = IF_RBF | IF_TBE;
-	mb();
-
-	/* disable break condition */
-	custom.adkcon = AC_UARTBRK;
-	mb();
-
-	if (!info->tty || (info->tty->termios->c_cflag & HUPCL))
-		info->MCR &= ~(SER_DTR|SER_RTS);
-	rtsdtr_ctrl(info->MCR);
-
-	if (info->tty)
-		set_bit(TTY_IO_ERROR, &info->tty->flags);
-
-	info->flags &= ~ASYNC_INITIALIZED;
-	local_irq_restore(flags);
-}
-
-
-/*
- * 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,
-			 struct ktermios *old_termios)
-{
-	int	quot = 0, baud_base, baud;
-	unsigned cflag, cval = 0;
-	int	bits;
-	unsigned long	flags;
-
-	if (!info->tty || !info->tty->termios)
-		return;
-	cflag = info->tty->termios->c_cflag;
-
-	/* Byte size is always 8 bits plus parity bit if requested */
-
-	cval = 3; bits = 10;
-	if (cflag & CSTOPB) {
-		cval |= 0x04;
-		bits++;
-	}
-	if (cflag & PARENB) {
-		cval |= UART_LCR_PARITY;
-		bits++;
-	}
-	if (!(cflag & PARODD))
-		cval |= UART_LCR_EPAR;
-#ifdef CMSPAR
-	if (cflag & CMSPAR)
-		cval |= UART_LCR_SPAR;
-#endif
-
-	/* 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 zero refuse the change */
-	if (!quot && old_termios) {
-		/* FIXME: Will need updating for new tty in the end */
-		info->tty->termios->c_cflag &= ~CBAUD;
-		info->tty->termios->c_cflag |= (old_termios->c_cflag & CBAUD);
-		baud = tty_get_baud_rate(info->tty);
-		if (!baud)
-			baud = 9600;
-		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;
-		}
-	}
-	/* As a last resort, if the quotient is 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 */
-
-	/* CTS flow control flag and modem status interrupts */
-	info->IER &= ~UART_IER_MSI;
-	if (info->flags & ASYNC_HARDPPS_CD)
-		info->IER |= UART_IER_MSI;
-	if (cflag & CRTSCTS) {
-		info->flags |= ASYNC_CTS_FLOW;
-		info->IER |= UART_IER_MSI;
-	} else
-		info->flags &= ~ASYNC_CTS_FLOW;
-	if (cflag & CLOCAL)
-		info->flags &= ~ASYNC_CHECK_CD;
-	else {
-		info->flags |= ASYNC_CHECK_CD;
-		info->IER |= UART_IER_MSI;
-	}
-	/* TBD:
-	 * Does clearing IER_MSI imply that we should disable the VBL interrupt ?
-	 */
-
-	/*
-	 * Set up parity check flag
-	 */
-
-	info->read_status_mask = UART_LSR_OE | UART_LSR_DR;
-	if (I_INPCK(info->tty))
-		info->read_status_mask |= UART_LSR_FE | UART_LSR_PE;
-	if (I_BRKINT(info->tty) || I_PARMRK(info->tty))
-		info->read_status_mask |= UART_LSR_BI;
-
-	/*
-	 * Characters to ignore
-	 */
-	info->ignore_status_mask = 0;
-	if (I_IGNPAR(info->tty))
-		info->ignore_status_mask |= UART_LSR_PE | UART_LSR_FE;
-	if (I_IGNBRK(info->tty)) {
-		info->ignore_status_mask |= UART_LSR_BI;
-		/*
-		 * If we're ignore parity and break indicators, ignore 
-		 * overruns too.  (For real raw support).
-		 */
-		if (I_IGNPAR(info->tty))
-			info->ignore_status_mask |= UART_LSR_OE;
-	}
-	/*
-	 * !!! ignore all characters if CREAD is not set
-	 */
-	if ((cflag & CREAD) == 0)
-		info->ignore_status_mask |= UART_LSR_DR;
-	local_irq_save(flags);
-
-	{
-	  short serper;
-
-	/* Set up the baud rate */
-	  serper = quot - 1;
-
-	/* Enable or disable parity bit */
-
-	if(cval & UART_LCR_PARITY)
-	  serper |= (SERPER_PARENB);
-
-	custom.serper = serper;
-	mb();
-	}
-
-	info->LCR = cval;				/* Save LCR */
-	local_irq_restore(flags);
-}
-
-static int rs_put_char(struct tty_struct *tty, unsigned char ch)
-{
-	struct async_struct *info;
-	unsigned long flags;
-
-	info = tty->driver_data;
-
-	if (serial_paranoia_check(info, tty->name, "rs_put_char"))
-		return 0;
-
-	if (!info->xmit.buf)
-		return 0;
-
-	local_irq_save(flags);
-	if (CIRC_SPACE(info->xmit.head,
-		       info->xmit.tail,
-		       SERIAL_XMIT_SIZE) == 0) {
-		local_irq_restore(flags);
-		return 0;
-	}
-
-	info->xmit.buf[info->xmit.head++] = ch;
-	info->xmit.head &= SERIAL_XMIT_SIZE-1;
-	local_irq_restore(flags);
-	return 1;
-}
-
-static void rs_flush_chars(struct tty_struct *tty)
-{
-	struct async_struct *info = tty->driver_data;
-	unsigned long flags;
-
-	if (serial_paranoia_check(info, tty->name, "rs_flush_chars"))
-		return;
-
-	if (info->xmit.head == info->xmit.tail
-	    || tty->stopped
-	    || tty->hw_stopped
-	    || !info->xmit.buf)
-		return;
-
-	local_irq_save(flags);
-	info->IER |= UART_IER_THRI;
-	custom.intena = IF_SETCLR | IF_TBE;
-	mb();
-	/* set a pending Tx Interrupt, transmitter should restart now */
-	custom.intreq = IF_SETCLR | IF_TBE;
-	mb();
-	local_irq_restore(flags);
-}
-
-static int rs_write(struct tty_struct * tty, const unsigned char *buf, int count)
-{
-	int	c, ret = 0;
-	struct async_struct *info;
-	unsigned long flags;
-
-	info = tty->driver_data;
-
-	if (serial_paranoia_check(info, tty->name, "rs_write"))
-		return 0;
-
-	if (!info->xmit.buf)
-		return 0;
-
-	local_irq_save(flags);
-	while (1) {
-		c = CIRC_SPACE_TO_END(info->xmit.head,
-				      info->xmit.tail,
-				      SERIAL_XMIT_SIZE);
-		if (count < c)
-			c = count;
-		if (c <= 0) {
-			break;
-		}
-		memcpy(info->xmit.buf + info->xmit.head, buf, c);
-		info->xmit.head = ((info->xmit.head + c) &
-				   (SERIAL_XMIT_SIZE-1));
-		buf += c;
-		count -= c;
-		ret += c;
-	}
-	local_irq_restore(flags);
-
-	if (info->xmit.head != info->xmit.tail
-	    && !tty->stopped
-	    && !tty->hw_stopped
-	    && !(info->IER & UART_IER_THRI)) {
-		info->IER |= UART_IER_THRI;
-		local_irq_disable();
-		custom.intena = IF_SETCLR | IF_TBE;
-		mb();
-		/* set a pending Tx Interrupt, transmitter should restart now */
-		custom.intreq = IF_SETCLR | IF_TBE;
-		mb();
-		local_irq_restore(flags);
-	}
-	return ret;
-}
-
-static int rs_write_room(struct tty_struct *tty)
-{
-	struct async_struct *info = tty->driver_data;
-
-	if (serial_paranoia_check(info, tty->name, "rs_write_room"))
-		return 0;
-	return CIRC_SPACE(info->xmit.head, info->xmit.tail, SERIAL_XMIT_SIZE);
-}
-
-static int rs_chars_in_buffer(struct tty_struct *tty)
-{
-	struct async_struct *info = tty->driver_data;
-
-	if (serial_paranoia_check(info, tty->name, "rs_chars_in_buffer"))
-		return 0;
-	return CIRC_CNT(info->xmit.head, info->xmit.tail, SERIAL_XMIT_SIZE);
-}
-
-static void rs_flush_buffer(struct tty_struct *tty)
-{
-	struct async_struct *info = tty->driver_data;
-	unsigned long flags;
-
-	if (serial_paranoia_check(info, tty->name, "rs_flush_buffer"))
-		return;
-	local_irq_save(flags);
-	info->xmit.head = info->xmit.tail = 0;
-	local_irq_restore(flags);
-	tty_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 = tty->driver_data;
-        unsigned long flags;
-
-	if (serial_paranoia_check(info, tty->name, "rs_send_char"))
-		return;
-
-	info->x_char = ch;
-	if (ch) {
-		/* Make sure transmit interrupts are on */
-
-	        /* Check this ! */
-	        local_irq_save(flags);
-		if(!(custom.intenar & IF_TBE)) {
-		    custom.intena = IF_SETCLR | IF_TBE;
-		    mb();
-		    /* set a pending Tx Interrupt, transmitter should restart now */
-		    custom.intreq = IF_SETCLR | IF_TBE;
-		    mb();
-		}
-		local_irq_restore(flags);
-
-		info->IER |= UART_IER_THRI;
-	}
-}
-
-/*
- * ------------------------------------------------------------
- * 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 = tty->driver_data;
-	unsigned long flags;
-#ifdef SERIAL_DEBUG_THROTTLE
-	char	buf[64];
-
-	printk("throttle %s: %d....\n", tty_name(tty, buf),
-	       tty->ldisc.chars_in_buffer(tty));
-#endif
-
-	if (serial_paranoia_check(info, tty->name, "rs_throttle"))
-		return;
-
-	if (I_IXOFF(tty))
-		rs_send_xchar(tty, STOP_CHAR(tty));
-
-	if (tty->termios->c_cflag & CRTSCTS)
-		info->MCR &= ~SER_RTS;
-
-	local_irq_save(flags);
-	rtsdtr_ctrl(info->MCR);
-	local_irq_restore(flags);
-}
-
-static void rs_unthrottle(struct tty_struct * tty)
-{
-	struct async_struct *info = tty->driver_data;
-	unsigned long flags;
-#ifdef SERIAL_DEBUG_THROTTLE
-	char	buf[64];
-
-	printk("unthrottle %s: %d....\n", tty_name(tty, buf),
-	       tty->ldisc.chars_in_buffer(tty));
-#endif
-
-	if (serial_paranoia_check(info, tty->name, "rs_unthrottle"))
-		return;
-
-	if (I_IXOFF(tty)) {
-		if (info->x_char)
-			info->x_char = 0;
-		else
-			rs_send_xchar(tty, START_CHAR(tty));
-	}
-	if (tty->termios->c_cflag & CRTSCTS)
-		info->MCR |= SER_RTS;
-	local_irq_save(flags);
-	rtsdtr_ctrl(info->MCR);
-	local_irq_restore(flags);
-}
-
-/*
- * ------------------------------------------------------------
- * rs_ioctl() and friends
- * ------------------------------------------------------------
- */
-
-static int get_serial_info(struct async_struct * info,
-			   struct serial_struct __user * retinfo)
-{
-	struct serial_struct tmp;
-	struct serial_state *state = info->state;
-   
-	if (!retinfo)
-		return -EFAULT;
-	memset(&tmp, 0, sizeof(tmp));
-	tty_lock();
-	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;
-	tty_unlock();
-	if (copy_to_user(retinfo,&tmp,sizeof(*retinfo)))
-		return -EFAULT;
-	return 0;
-}
-
-static int set_serial_info(struct async_struct * info,
-			   struct serial_struct __user * new_info)
-{
-	struct serial_struct new_serial;
- 	struct serial_state old_state, *state;
-	unsigned int		change_irq,change_port;
-	int 			retval = 0;
-
-	if (copy_from_user(&new_serial,new_info,sizeof(new_serial)))
-		return -EFAULT;
-
-	tty_lock();
-	state = info->state;
-	old_state = *state;
-  
-	change_irq = new_serial.irq != state->irq;
-	change_port = (new_serial.port != state->port);
-	if(change_irq || change_port || (new_serial.xmit_fifo_size != state->xmit_fifo_size)) {
-	  tty_unlock();
-	  return -EINVAL;
-	}
-  
-	if (!serial_isroot()) {
-		if ((new_serial.baud_base != state->baud_base) ||
-		    (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 = ((info->flags & ~ASYNC_USR_MASK) |
-			       (new_serial.flags & ASYNC_USR_MASK));
-		state->custom_divisor = new_serial.custom_divisor;
-		goto check_and_exit;
-	}
-
-	if (new_serial.baud_base < 9600) {
-		tty_unlock();
-		return -EINVAL;
-	}
-
-	/*
-	 * 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->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;
-
-check_and_exit:
-	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, NULL);
-		}
-	} else
-		retval = startup(info);
-	tty_unlock();
-	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 __user *value)
-{
-	unsigned char status;
-	unsigned int result;
-	unsigned long flags;
-
-	local_irq_save(flags);
-	status = custom.serdatr;
-	mb();
-	local_irq_restore(flags);
-	result = ((status & SDR_TSRE) ? TIOCSER_TEMT : 0);
-	if (copy_to_user(value, &result, sizeof(int)))
-		return -EFAULT;
-	return 0;
-}
-
-
-static int rs_tiocmget(struct tty_struct *tty)
-{
-	struct async_struct * info = tty->driver_data;
-	unsigned char control, status;
-	unsigned long flags;
-
-	if (serial_paranoia_check(info, tty->name, "rs_ioctl"))
-		return -ENODEV;
-	if (tty->flags & (1 << TTY_IO_ERROR))
-		return -EIO;
-
-	control = info->MCR;
-	local_irq_save(flags);
-	status = ciab.pra;
-	local_irq_restore(flags);
-	return    ((control & SER_RTS) ? TIOCM_RTS : 0)
-		| ((control & SER_DTR) ? TIOCM_DTR : 0)
-		| (!(status  & SER_DCD) ? TIOCM_CAR : 0)
-		| (!(status  & SER_DSR) ? TIOCM_DSR : 0)
-		| (!(status  & SER_CTS) ? TIOCM_CTS : 0);
-}
-
-static int rs_tiocmset(struct tty_struct *tty, unsigned int set,
-						unsigned int clear)
-{
-	struct async_struct * info = tty->driver_data;
-	unsigned long flags;
-
-	if (serial_paranoia_check(info, tty->name, "rs_ioctl"))
-		return -ENODEV;
-	if (tty->flags & (1 << TTY_IO_ERROR))
-		return -EIO;
-
-	local_irq_save(flags);
-	if (set & TIOCM_RTS)
-		info->MCR |= SER_RTS;
-	if (set & TIOCM_DTR)
-		info->MCR |= SER_DTR;
-	if (clear & TIOCM_RTS)
-		info->MCR &= ~SER_RTS;
-	if (clear & TIOCM_DTR)
-		info->MCR &= ~SER_DTR;
-	rtsdtr_ctrl(info->MCR);
-	local_irq_restore(flags);
-	return 0;
-}
-
-/*
- * rs_break() --- routine which turns the break handling on or off
- */
-static int rs_break(struct tty_struct *tty, int break_state)
-{
-	struct async_struct * info = tty->driver_data;
-	unsigned long flags;
-
-	if (serial_paranoia_check(info, tty->name, "rs_break"))
-		return -EINVAL;
-
-	local_irq_save(flags);
-	if (break_state == -1)
-	  custom.adkcon = AC_SETCLR | AC_UARTBRK;
-	else
-	  custom.adkcon = AC_UARTBRK;
-	mb();
-	local_irq_restore(flags);
-	return 0;
-}
-
-/*
- * 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.
- */
-static int rs_get_icount(struct tty_struct *tty,
-				struct serial_icounter_struct *icount)
-{
-	struct async_struct *info = tty->driver_data;
-	struct async_icount cnow;
-	unsigned long flags;
-
-	local_irq_save(flags);
-	cnow = info->state->icount;
-	local_irq_restore(flags);
-	icount->cts = cnow.cts;
-	icount->dsr = cnow.dsr;
-	icount->rng = cnow.rng;
-	icount->dcd = cnow.dcd;
-	icount->rx = cnow.rx;
-	icount->tx = cnow.tx;
-	icount->frame = cnow.frame;
-	icount->overrun = cnow.overrun;
-	icount->parity = cnow.parity;
-	icount->brk = cnow.brk;
-	icount->buf_overrun = cnow.buf_overrun;
-
-	return 0;
-}
-
-static int rs_ioctl(struct tty_struct *tty,
-		    unsigned int cmd, unsigned long arg)
-{
-	struct async_struct * info = tty->driver_data;
-	struct async_icount cprev, cnow;	/* kernel counter temps */
-	void __user *argp = (void __user *)arg;
-	unsigned long flags;
-
-	if (serial_paranoia_check(info, tty->name, "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 TIOCGSERIAL:
-			return get_serial_info(info, argp);
-		case TIOCSSERIAL:
-			return set_serial_info(info, argp);
-		case TIOCSERCONFIG:
-			return 0;
-
-		case TIOCSERGETLSR: /* Get line status register */
-			return get_lsr_info(info, argp);
-
-		case TIOCSERGSTRUCT:
-			if (copy_to_user(argp,
-					 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:
-			local_irq_save(flags);
-			/* note the counters on entry */
-			cprev = info->state->icount;
-			local_irq_restore(flags);
-			while (1) {
-				interruptible_sleep_on(&info->delta_msr_wait);
-				/* see if a signal did it */
-				if (signal_pending(current))
-					return -ERESTARTSYS;
-				local_irq_save(flags);
-				cnow = info->state->icount; /* atomic copy */
-				local_irq_restore(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 */
-
-		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 ktermios *old_termios)
-{
-	struct async_struct *info = tty->driver_data;
-	unsigned long flags;
-	unsigned int cflag = tty->termios->c_cflag;
-
-	change_speed(info, old_termios);
-
-	/* Handle transition to B0 status */
-	if ((old_termios->c_cflag & CBAUD) &&
-	    !(cflag & CBAUD)) {
-		info->MCR &= ~(SER_DTR|SER_RTS);
-		local_irq_save(flags);
-		rtsdtr_ctrl(info->MCR);
-		local_irq_restore(flags);
-	}
-
-	/* Handle transition away from B0 status */
-	if (!(old_termios->c_cflag & CBAUD) &&
-	    (cflag & CBAUD)) {
-		info->MCR |= SER_DTR;
-		if (!(tty->termios->c_cflag & CRTSCTS) || 
-		    !test_bit(TTY_THROTTLED, &tty->flags)) {
-			info->MCR |= SER_RTS;
-		}
-		local_irq_save(flags);
-		rtsdtr_ctrl(info->MCR);
-		local_irq_restore(flags);
-	}
-
-	/* Handle turning off CRTSCTS */
-	if ((old_termios->c_cflag & CRTSCTS) &&
-	    !(tty->termios->c_cflag & CRTSCTS)) {
-		tty->hw_stopped = 0;
-		rs_start(tty);
-	}
-
-#if 0
-	/*
-	 * No need to wake up processes in open wait, since they
-	 * sample the CLOCAL flag once, and don't recheck it.
-	 * XXX  It's not clear whether the current behavior is correct
-	 * or not.  Hence, this may change.....
-	 */
-	if (!(old_termios->c_cflag & CLOCAL) &&
-	    (tty->termios->c_cflag & CLOCAL))
-		wake_up_interruptible(&info->open_wait);
-#endif
-}
-
-/*
- * ------------------------------------------------------------
- * 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 = tty->driver_data;
-	struct serial_state *state;
-	unsigned long flags;
-
-	if (!info || serial_paranoia_check(info, tty->name, "rs_close"))
-		return;
-
-	state = info->state;
-
-	local_irq_save(flags);
-
-	if (tty_hung_up_p(filp)) {
-		DBG_CNT("before DEC-hung");
-		local_irq_restore(flags);
-		return;
-	}
-
-#ifdef SERIAL_DEBUG_OPEN
-	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.
-		 */
-		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) {
-		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");
-		local_irq_restore(flags);
-		return;
-	}
-	info->flags |= ASYNC_CLOSING;
-	/*
-	 * 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->read_status_mask &= ~UART_LSR_DR;
-	if (info->flags & ASYNC_INITIALIZED) {
-	        /* disable receive interrupts */
-	        custom.intena = IF_RBF;
-		mb();
-		/* clear any pending receive interrupt */
-		custom.intreq = IF_RBF;
-		mb();
-
-		/*
-		 * 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);
-	rs_flush_buffer(tty);
-		
-	tty_ldisc_flush(tty);
-	tty->closing = 0;
-	info->event = 0;
-	info->tty = NULL;
-	if (info->blocked_open) {
-		if (info->close_delay) {
-			msleep_interruptible(jiffies_to_msecs(info->close_delay));
-		}
-		wake_up_interruptible(&info->open_wait);
-	}
-	info->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
-	wake_up_interruptible(&info->close_wait);
-	local_irq_restore(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 = tty->driver_data;
-	unsigned long orig_jiffies, char_time;
-	int tty_was_locked = tty_locked();
-	int lsr;
-
-	if (serial_paranoia_check(info, tty->name, "rs_wait_until_sent"))
-		return;
-
-	if (info->xmit_fifo_size == 0)
-		return; /* Just in case.... */
-
-	orig_jiffies = jiffies;
-
-	/*
-	 * tty_wait_until_sent is called from lots of places,
-	 * with or without the BTM.
-	 */
-	if (!tty_was_locked)
-		tty_lock();
-	/*
-	 * 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_t(unsigned long, char_time, timeout);
-	/*
-	 * If the transmitter hasn't cleared in twice the approximate
-	 * amount of time to send the entire FIFO, it probably won't
-	 * ever clear.  This assumes the UART isn't doing flow
-	 * control, which is currently the case.  Hence, if it ever
-	 * takes longer than info->timeout, this is probably due to a
-	 * UART bug of some kind.  So, we clamp the timeout parameter at
-	 * 2*info->timeout.
-	 */
-	if (!timeout || timeout > 2*info->timeout)
-		timeout = 2*info->timeout;
-#ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
-	printk("In rs_wait_until_sent(%d) check=%lu...", timeout, char_time);
-	printk("jiff=%lu...", jiffies);
-#endif
-	while(!((lsr = custom.serdatr) & SDR_TSRE)) {
-#ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
-		printk("serdatr = %d (jiff=%lu)...", lsr, jiffies);
-#endif
-		msleep_interruptible(jiffies_to_msecs(char_time));
-		if (signal_pending(current))
-			break;
-		if (timeout && time_after(jiffies, orig_jiffies + timeout))
-			break;
-	}
-	__set_current_state(TASK_RUNNING);
-	if (!tty_was_locked)
-		tty_unlock();
-#ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
-	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 = tty->driver_data;
-	struct serial_state *state = info->state;
-
-	if (serial_paranoia_check(info, tty->name, "rs_hangup"))
-		return;
-
-	state = info->state;
-
-	rs_flush_buffer(tty);
-	shutdown(info);
-	info->event = 0;
-	state->count = 0;
-	info->flags &= ~ASYNC_NORMAL_ACTIVE;
-	info->tty = NULL;
-	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)
-{
-#ifdef DECLARE_WAITQUEUE
-	DECLARE_WAITQUEUE(wait, current);
-#else
-	struct wait_queue wait = { current, NULL };
-#endif
-	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 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))) {
-		info->flags |= ASYNC_NORMAL_ACTIVE;
-		return 0;
-	}
-
-	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
-	printk("block_til_ready before block: ttys%d, count = %d\n",
-	       state->line, state->count);
-#endif
-	local_irq_save(flags);
-	if (!tty_hung_up_p(filp)) {
-		extra_count = 1;
-		state->count--;
-	}
-	local_irq_restore(flags);
-	info->blocked_open++;
-	while (1) {
-		local_irq_save(flags);
-		if (tty->termios->c_cflag & CBAUD)
-		        rtsdtr_ctrl(SER_DTR|SER_RTS);
-		local_irq_restore(flags);
-		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_CLOSING) &&
-		    (do_clocal || (!(ciab.pra & SER_DCD)) ))
-			break;
-		if (signal_pending(current)) {
-			retval = -ERESTARTSYS;
-			break;
-		}
-#ifdef SERIAL_DEBUG_OPEN
-		printk("block_til_ready blocking: ttys%d, count = %d\n",
-		       info->line, state->count);
-#endif
-		tty_unlock();
-		schedule();
-		tty_lock();
-	}
-	__set_current_state(TASK_RUNNING);
-	remove_wait_queue(&info->open_wait, &wait);
-	if (extra_count)
-		state->count++;
-	info->blocked_open--;
-#ifdef SERIAL_DEBUG_OPEN
-	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 = kzalloc(sizeof(struct async_struct), GFP_KERNEL);
-	if (!info) {
-		sstate->count--;
-		return -ENOMEM;
-	}
-#ifdef DECLARE_WAITQUEUE
-	init_waitqueue_head(&info->open_wait);
-	init_waitqueue_head(&info->close_wait);
-	init_waitqueue_head(&info->delta_msr_wait);
-#endif
-	info->magic = SERIAL_MAGIC;
-	info->port = sstate->port;
-	info->flags = sstate->flags;
-	info->xmit_fifo_size = sstate->xmit_fifo_size;
-	info->line = line;
-	tasklet_init(&info->tlet, do_softint, (unsigned long)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;
-
-	line = tty->index;
-	if ((line < 0) || (line >= NR_PORTS)) {
-		return -ENODEV;
-	}
-	retval = get_async_struct(line, &info);
-	if (retval) {
-		return retval;
-	}
-	tty->driver_data = info;
-	info->tty = tty;
-	if (serial_paranoia_check(info, tty->name, "rs_open"))
-		return -ENODEV;
-
-#ifdef SERIAL_DEBUG_OPEN
-	printk("rs_open %s, count = %d\n", tty->name, info->state->count);
-#endif
-	info->tty->low_latency = (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
-
-	/*
-	 * 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);
-#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) {
-		return retval;
-	}
-
-	retval = block_til_ready(tty, filp, info);
-	if (retval) {
-#ifdef SERIAL_DEBUG_OPEN
-		printk("rs_open returning after block_til_ready with %d\n",
-		       retval);
-#endif
-		return retval;
-	}
-
-#ifdef SERIAL_DEBUG_OPEN
-	printk("rs_open %s successful...", tty->name);
-#endif
-	return 0;
-}
-
-/*
- * /proc fs routines....
- */
-
-static inline void line_info(struct seq_file *m, struct serial_state *state)
-{
-	struct async_struct *info = state->info, scr_info;
-	char	stat_buf[30], control, status;
-	unsigned long flags;
-
-	seq_printf(m, "%d: uart:amiga_builtin",state->line);
-
-	/*
-	 * Figure out the current RS-232 lines
-	 */
-	if (!info) {
-		info = &scr_info;	/* This is just for serial_{in,out} */
-
-		info->magic = SERIAL_MAGIC;
-		info->flags = state->flags;
-		info->quot = 0;
-		info->tty = NULL;
-	}
-	local_irq_save(flags);
-	status = ciab.pra;
-	control = info ? info->MCR : status;
-	local_irq_restore(flags);
-
-	stat_buf[0] = 0;
-	stat_buf[1] = 0;
-	if(!(control & SER_RTS))
-		strcat(stat_buf, "|RTS");
-	if(!(status & SER_CTS))
-		strcat(stat_buf, "|CTS");
-	if(!(control & SER_DTR))
-		strcat(stat_buf, "|DTR");
-	if(!(status & SER_DSR))
-		strcat(stat_buf, "|DSR");
-	if(!(status & SER_DCD))
-		strcat(stat_buf, "|CD");
-
-	if (info->quot) {
-		seq_printf(m, " baud:%d", state->baud_base / info->quot);
-	}
-
-	seq_printf(m, " tx:%d rx:%d", state->icount.tx, state->icount.rx);
-
-	if (state->icount.frame)
-		seq_printf(m, " fe:%d", state->icount.frame);
-
-	if (state->icount.parity)
-		seq_printf(m, " pe:%d", state->icount.parity);
-
-	if (state->icount.brk)
-		seq_printf(m, " brk:%d", state->icount.brk);
-
-	if (state->icount.overrun)
-		seq_printf(m, " oe:%d", state->icount.overrun);
-
-	/*
-	 * Last thing is the RS-232 status lines
-	 */
-	seq_printf(m, " %s\n", stat_buf+1);
-}
-
-static int rs_proc_show(struct seq_file *m, void *v)
-{
-	seq_printf(m, "serinfo:1.0 driver:%s\n", serial_version);
-	line_info(m, &rs_table[0]);
-	return 0;
-}
-
-static int rs_proc_open(struct inode *inode, struct file *file)
-{
-	return single_open(file, rs_proc_show, NULL);
-}
-
-static const struct file_operations rs_proc_fops = {
-	.owner		= THIS_MODULE,
-	.open		= rs_proc_open,
-	.read		= seq_read,
-	.llseek		= seq_lseek,
-	.release	= single_release,
-};
-
-/*
- * ---------------------------------------------------------------------
- * 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 void show_serial_version(void)
-{
- 	printk(KERN_INFO "%s version %s\n", serial_name, serial_version);
-}
-
-
-static const struct tty_operations serial_ops = {
-	.open = rs_open,
-	.close = rs_close,
-	.write = rs_write,
-	.put_char = rs_put_char,
-	.flush_chars = rs_flush_chars,
-	.write_room = rs_write_room,
-	.chars_in_buffer = rs_chars_in_buffer,
-	.flush_buffer = rs_flush_buffer,
-	.ioctl = rs_ioctl,
-	.throttle = rs_throttle,
-	.unthrottle = rs_unthrottle,
-	.set_termios = rs_set_termios,
-	.stop = rs_stop,
-	.start = rs_start,
-	.hangup = rs_hangup,
-	.break_ctl = rs_break,
-	.send_xchar = rs_send_xchar,
-	.wait_until_sent = rs_wait_until_sent,
-	.tiocmget = rs_tiocmget,
-	.tiocmset = rs_tiocmset,
-	.get_icount = rs_get_icount,
-	.proc_fops = &rs_proc_fops,
-};
-
-/*
- * The serial driver boot-time initialization code!
- */
-static int __init amiga_serial_probe(struct platform_device *pdev)
-{
-	unsigned long flags;
-	struct serial_state * state;
-	int error;
-
-	serial_driver = alloc_tty_driver(1);
-	if (!serial_driver)
-		return -ENOMEM;
-
-	IRQ_ports = NULL;
-
-	show_serial_version();
-
-	/* Initialize the tty_driver structure */
-
-	serial_driver->owner = THIS_MODULE;
-	serial_driver->driver_name = "amiserial";
-	serial_driver->name = "ttyS";
-	serial_driver->major = TTY_MAJOR;
-	serial_driver->minor_start = 64;
-	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;
-	tty_set_operations(serial_driver, &serial_ops);
-
-	error = tty_register_driver(serial_driver);
-	if (error)
-		goto fail_put_tty_driver;
-
-	state = rs_table;
-	state->magic = SSTATE_MAGIC;
-	state->port = (int)&custom.serdatr; /* Just to give it a value */
-	state->line = 0;
-	state->custom_divisor = 0;
-	state->close_delay = 5*HZ/10;
-	state->closing_wait = 30*HZ;
-	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;
-
-	printk(KERN_INFO "ttyS%d is the amiga builtin serial port\n",
-		       state->line);
-
-	/* Hardware set up */
-
-	state->baud_base = amiga_colorclock;
-	state->xmit_fifo_size = 1;
-
-	/* set ISRs, and then disable the rx interrupts */
-	error = request_irq(IRQ_AMIGA_TBE, ser_tx_int, 0, "serial TX", state);
-	if (error)
-		goto fail_unregister;
-
-	error = request_irq(IRQ_AMIGA_RBF, ser_rx_int, IRQF_DISABLED,
-			    "serial RX", state);
-	if (error)
-		goto fail_free_irq;
-
-	local_irq_save(flags);
-
-	/* turn off Rx and Tx interrupts */
-	custom.intena = IF_RBF | IF_TBE;
-	mb();
-
-	/* clear any pending interrupt */
-	custom.intreq = IF_RBF | IF_TBE;
-	mb();
-
-	local_irq_restore(flags);
-
-	/*
-	 * set the appropriate directions for the modem control flags,
-	 * and clear RTS and DTR
-	 */
-	ciab.ddra |= (SER_DTR | SER_RTS);   /* outputs */
-	ciab.ddra &= ~(SER_DCD | SER_CTS | SER_DSR);  /* inputs */
-
-	platform_set_drvdata(pdev, state);
-
-	return 0;
-
-fail_free_irq:
-	free_irq(IRQ_AMIGA_TBE, state);
-fail_unregister:
-	tty_unregister_driver(serial_driver);
-fail_put_tty_driver:
-	put_tty_driver(serial_driver);
-	return error;
-}
-
-static int __exit amiga_serial_remove(struct platform_device *pdev)
-{
-	int error;
-	struct serial_state *state = platform_get_drvdata(pdev);
-	struct async_struct *info = state->info;
-
-	/* printk("Unloading %s: version %s\n", serial_name, serial_version); */
-	tasklet_kill(&info->tlet);
-	if ((error = tty_unregister_driver(serial_driver)))
-		printk("SERIAL: failed to unregister serial driver (%d)\n",
-		       error);
-	put_tty_driver(serial_driver);
-
-	rs_table[0].info = NULL;
-	kfree(info);
-
-	free_irq(IRQ_AMIGA_TBE, rs_table);
-	free_irq(IRQ_AMIGA_RBF, rs_table);
-
-	platform_set_drvdata(pdev, NULL);
-
-	return error;
-}
-
-static struct platform_driver amiga_serial_driver = {
-	.remove = __exit_p(amiga_serial_remove),
-	.driver   = {
-		.name	= "amiga-serial",
-		.owner	= THIS_MODULE,
-	},
-};
-
-static int __init amiga_serial_init(void)
-{
-	return platform_driver_probe(&amiga_serial_driver, amiga_serial_probe);
-}
-
-module_init(amiga_serial_init);
-
-static void __exit amiga_serial_exit(void)
-{
-	platform_driver_unregister(&amiga_serial_driver);
-}
-
-module_exit(amiga_serial_exit);
-
-
-#if defined(CONFIG_SERIAL_CONSOLE) && !defined(MODULE)
-
-/*
- * ------------------------------------------------------------
- * Serial console driver
- * ------------------------------------------------------------
- */
-
-static void amiga_serial_putc(char c)
-{
-	custom.serdat = (unsigned char)c | 0x100;
-	while (!(custom.serdatr & 0x2000))
-		barrier();
-}
-
-/*
- *	Print a string to the serial port trying not to disturb
- *	any possible real use of the port...
- *
- *	The console must be locked when we get here.
- */
-static void serial_console_write(struct console *co, const char *s,
-				unsigned count)
-{
-	unsigned short intena = custom.intenar;
-
-	custom.intena = IF_TBE;
-
-	while (count--) {
-		if (*s == '\n')
-			amiga_serial_putc('\r');
-		amiga_serial_putc(*s++);
-	}
-
-	custom.intena = IF_SETCLR | (intena & IF_TBE);
-}
-
-static struct tty_driver *serial_console_device(struct console *c, int *index)
-{
-	*index = 0;
-	return serial_driver;
-}
-
-static struct console sercons = {
-	.name =		"ttyS",
-	.write =	serial_console_write,
-	.device =	serial_console_device,
-	.flags =	CON_PRINTBUFFER,
-	.index =	-1,
-};
-
-/*
- *	Register console.
- */
-static int __init amiserial_console_init(void)
-{
-	register_console(&sercons);
-	return 0;
-}
-console_initcall(amiserial_console_init);
-
-#endif /* CONFIG_SERIAL_CONSOLE && !MODULE */
-
-MODULE_LICENSE("GPL");
-MODULE_ALIAS("platform:amiga-serial");