strip the kernel version suffix from target directories, except for brcm-2.4 (the -2.4 will be included in the board name here). CONFIG_LINUX_<ver>_<board> becomes CONFIG_TARGET_<board>, same for profiles.

SVN-Revision: 8653

1 files changed, 1041 insertions, 0 deletions

diff --git a/target/linux/brcm63xx/files/drivers/serial/bcm63xx_cons.c b/target/linux/brcm63xx/files/drivers/serial/bcm63xx_cons.c
new file mode 100644
index 0000000000..b026aa10ab
--- /dev/null
+++ b/target/linux/brcm63xx/files/drivers/serial/bcm63xx_cons.c
@@ -0,0 +1,1041 @@
+/*
+<:copyright-gpl 
+ Copyright 2002 Broadcom Corp. All Rights Reserved. 
+ 
+ This program is free software; you can distribute it and/or modify it 
+ under the terms of the GNU General Public License (Version 2) as 
+ published by the Free Software Foundation. 
+ 
+ This program is distributed in the hope it will be useful, but WITHOUT 
+ ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 
+ FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License 
+ for more details. 
+ 
+ You should have received a copy of the GNU General Public License along 
+ with this program; if not, write to the Free Software Foundation, Inc., 
+ 59 Temple Place - Suite 330, Boston MA 02111-1307, USA. 
+:>
+*/
+
+/* Description: Serial port driver for the BCM963XX. */
+
+#define CARDNAME    "bcm963xx_serial driver"
+#define VERSION     "2.0"
+#define VER_STR     CARDNAME " v" VERSION "\n"
+
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/version.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/interrupt.h>
+#include <linux/spinlock.h>
+
+/* for definition of struct console */
+#include <linux/console.h>
+#include <linux/tty.h>
+#include <linux/tty_flip.h>
+#include <linux/serial.h>
+#include <linux/serialP.h>
+#include <asm/uaccess.h>
+
+#include <bcmtypes.h>
+#include <board.h>
+#include <bcm_map_part.h>
+#include <bcm_intr.h>
+#include <6348_map_part.h>
+#include <6348_intr.h>
+
+static DEFINE_SPINLOCK(bcm963xx_serial_lock);
+
+extern void _putc(char);
+extern void _puts(const char *);
+
+typedef struct bcm_serial {
+	volatile Uart *port;
+	int type;
+	int flags;
+	int irq;
+	int baud_base;
+	int blocked_open;
+	unsigned short close_delay;
+	unsigned short closing_wait;
+	unsigned short line;	/* port/line number */
+	unsigned short cflags;	/* line configuration flag */
+	unsigned short x_char;	/* xon/xoff character */
+	unsigned short read_status_mask;	/* mask for read condition */
+	unsigned short ignore_status_mask;	/* mask for ignore condition */
+	unsigned long event;	/* mask used in BH */
+	int xmit_head;		/* Position of the head */
+	int xmit_tail;		/* Position of the tail */
+	int xmit_cnt;		/* Count of the chars in the buffer */
+	int count;		/* indicates how many times it has been opened */
+	int magic;
+
+	struct async_icount icount;	/* keep track of things ... */
+	struct tty_struct *tty;	/* tty associated */
+	struct ktermios normal_termios;
+
+	wait_queue_head_t open_wait;
+	wait_queue_head_t close_wait;
+
+	long session;		/* Session of opening process */
+	long pgrp;		/* pgrp of opening process */
+
+	unsigned char is_initialized;
+} Context;
+
+
+/*---------------------------------------------------------------------*/
+/* Define bits in the Interrupt Enable register                        */
+/*---------------------------------------------------------------------*/
+/* Enable receive interrupt              */
+#define RXINT   (RXFIFONE|RXOVFERR)
+
+/* Enable transmit interrupt             */
+#define TXINT    (TXFIFOEMT|TXUNDERR|TXOVFERR)
+
+/* Enable receiver line status interrupt */
+#define LSINT    (RXBRK|RXPARERR|RXFRAMERR)
+
+#define BCM_NUM_UARTS                   1
+
+#define BD_BCM63XX_TIMER_CLOCK_INPUT    (FPERIPH)
+
+
+static struct bcm_serial multi[BCM_NUM_UARTS];
+static struct bcm_serial *lines[BCM_NUM_UARTS];
+static struct tty_driver *serial_driver;
+static struct ktermios *serial_termios[BCM_NUM_UARTS];
+static struct ktermios *serial_termios_locked[BCM_NUM_UARTS];
+
+
+static void bcm_stop(struct tty_struct *tty);
+static void bcm_start(struct tty_struct *tty);
+static inline void receive_chars(struct bcm_serial *info);
+static int startup(struct bcm_serial *info);
+static void shutdown(struct bcm_serial *info);
+static void change_speed(volatile Uart * pUart, tcflag_t cFlag);
+static void bcm63xx_cons_flush_chars(struct tty_struct *tty);
+static int bcm63xx_cons_write(struct tty_struct *tty,
+			      const unsigned char *buf, int count);
+static int bcm63xx_cons_write_room(struct tty_struct *tty);
+static int bcm_chars_in_buffer(struct tty_struct *tty);
+static void bcm_flush_buffer(struct tty_struct *tty);
+static void bcm_throttle(struct tty_struct *tty);
+static void bcm_unthrottle(struct tty_struct *tty);
+static void bcm_send_xchar(struct tty_struct *tty, char ch);
+static int get_serial_info(struct bcm_serial *info,
+			   struct serial_struct *retinfo);
+static int set_serial_info(struct bcm_serial *info,
+			   struct serial_struct *new_info);
+static int get_lsr_info(struct bcm_serial *info, unsigned int *value);
+static void send_break(struct bcm_serial *info, int duration);
+static int bcm_ioctl(struct tty_struct *tty, struct file *file,
+		     unsigned int cmd, unsigned long arg);
+static void bcm_set_termios(struct tty_struct *tty,
+			    struct ktermios *old_termios);
+static void bcm63xx_cons_close(struct tty_struct *tty, struct file *filp);
+static void bcm_hangup(struct tty_struct *tty);
+static int block_til_ready(struct tty_struct *tty, struct file *filp,
+			   struct bcm_serial *info);
+static int bcm63xx_cons_open(struct tty_struct *tty, struct file *filp);
+static int __init bcm63xx_serialinit(void);
+
+
+/*
+ * ------------------------------------------------------------
+ * rs_stop () and rs_start ()
+ *
+ * These routines are called before setting or resetting 
+ * tty->stopped. They enable or disable transmitter interrupts, 
+ * as necessary.
+ * ------------------------------------------------------------
+ */
+static void bcm_stop(struct tty_struct *tty)
+{
+}
+
+static void bcm_start(struct tty_struct *tty)
+{
+	_puts(CARDNAME " Start\n");
+}
+
+/*
+ * ------------------------------------------------------------
+ * receive_char ()
+ *
+ * This routine deals with inputs from any lines.
+ * ------------------------------------------------------------
+ */
+static inline void receive_chars(struct bcm_serial *info)
+{
+	struct tty_struct *tty = 0;
+	struct async_icount *icount;
+	int ignore = 0;
+	unsigned short status, tmp;
+	UCHAR ch = 0;
+	while ((status = info->port->intStatus) & RXINT) {
+		char flag_char = TTY_NORMAL;
+
+		if (status & RXFIFONE)
+			ch = info->port->Data;	// Read the character
+		tty = info->tty;	/* now tty points to the proper dev */
+		icount = &info->icount;
+		if (!tty)
+			break;
+		if (!tty_buffer_request_room(tty, 1))
+			break;
+		icount->rx++;
+		if (status & RXBRK) {
+			flag_char = TTY_BREAK;
+			icount->brk++;
+		}
+		// keep track of the statistics
+		if (status & (RXFRAMERR | RXPARERR | RXOVFERR)) {
+			if (status & RXPARERR)	/* parity error */
+				icount->parity++;
+			else if (status & RXFRAMERR)	/* frame error */
+				icount->frame++;
+			if (status & RXOVFERR) {
+				// Overflow. Reset the RX FIFO
+				info->port->fifoctl |= RSTRXFIFOS;
+				icount->overrun++;
+			}
+			// check to see if we should ignore the character
+			// and mask off conditions that should be ignored
+			if (status & info->ignore_status_mask) {
+				if (++ignore > 100)
+					break;
+				goto ignore_char;
+			}
+			// Mask off the error conditions we want to ignore
+			tmp = status & info->read_status_mask;
+			if (tmp & RXPARERR) {
+				flag_char = TTY_PARITY;
+			} else if (tmp & RXFRAMERR) {
+				flag_char = TTY_FRAME;
+			}
+			if (tmp & RXOVFERR) {
+				tty_insert_flip_char(tty, ch, flag_char);
+				ch = 0;
+				flag_char = TTY_OVERRUN;
+				if (!tty_buffer_request_room(tty, 1))
+					break;
+			}
+		}
+		tty_insert_flip_char(tty, ch, flag_char);
+	}
+      ignore_char:;
+	tty_flip_buffer_push(tty);
+	tty_schedule_flip(tty);
+
+}
+
+
+/*
+ * ------------------------------------------------------------
+ * bcm_interrupt ()
+ *
+ * this is the main interrupt routine for the chip.
+ * It deals with the multiple ports.
+ * ------------------------------------------------------------
+ */
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
+static irqreturn_t bcm_interrupt(int irq, void *dev)
+#else
+static void bcm_interrupt(int irq, void *dev, struct pt_regs *regs)
+#endif
+{
+	struct bcm_serial *info = lines[0];
+	UINT16 intStat;
+
+	/* get pending interrupt flags from UART  */
+
+	/* Mask with only the serial interrupts that are enabled */
+	intStat = info->port->intStatus & info->port->intMask;
+	while (intStat) {
+		if (intStat & RXINT)
+			receive_chars(info);
+		else if (intStat & TXINT)
+			info->port->intStatus = TXINT;
+		else		/* don't know what it was, so let's mask it */
+			info->port->intMask &= ~intStat;
+
+		intStat = info->port->intStatus & info->port->intMask;
+	}
+
+	// Clear the interrupt
+	enable_brcm_irq(INTERRUPT_ID_UART);
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
+	return IRQ_HANDLED;
+#endif
+}
+
+/*
+ * -------------------------------------------------------------------
+ * startup ()
+ *
+ * various initialization tasks
+ * ------------------------------------------------------------------- 
+ */
+static int startup(struct bcm_serial *info)
+{
+	// Port is already started...
+	return 0;
+}
+
+/* 
+ * -------------------------------------------------------------------
+ * shutdown ()
+ *
+ * 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 bcm_serial *info)
+{
+	unsigned long flags;
+	if (!info->is_initialized)
+		return;
+
+	spin_lock_irqsave(&bcm963xx_serial_lock, flags);
+
+	info->port->control &= ~(BRGEN | TXEN | RXEN);
+	if (info->tty)
+		set_bit(TTY_IO_ERROR, &info->tty->flags);
+	info->is_initialized = 0;
+
+	spin_unlock_irqrestore(&bcm963xx_serial_lock, flags);
+}
+
+/* 
+ * -------------------------------------------------------------------
+ * change_speed ()
+ *
+ * Set the baud rate, character size, parity and stop bits.
+ * ------------------------------------------------------------------- 
+ */
+static void change_speed(volatile Uart * pUart, tcflag_t cFlag)
+{
+	unsigned long ulFlags, ulBaud, ulClockFreqHz, ulTmp;
+
+	spin_lock_irqsave(&bcm963xx_serial_lock, ulFlags);
+	switch (cFlag & (CBAUD | CBAUDEX)) {
+	case B115200:
+		ulBaud = 115200;
+		break;
+	case B57600:
+		ulBaud = 57600;
+		break;
+	case B38400:
+		ulBaud = 38400;
+		break;
+	case B19200:
+		ulBaud = 19200;
+		break;
+	case B9600:
+		ulBaud = 9600;
+		break;
+	case B4800:
+		ulBaud = 4800;
+		break;
+	case B2400:
+		ulBaud = 2400;
+		break;
+	case B1800:
+		ulBaud = 1800;
+		break;
+	case B1200:
+		ulBaud = 1200;
+		break;
+	case B600:
+		ulBaud = 600;
+		break;
+	case B300:
+		ulBaud = 300;
+		break;
+	case B200:
+		ulBaud = 200;
+		break;
+	case B150:
+		ulBaud = 150;
+		break;
+	case B134:
+		ulBaud = 134;
+		break;
+	case B110:
+		ulBaud = 110;
+		break;
+	case B75:
+		ulBaud = 75;
+		break;
+	case B50:
+		ulBaud = 50;
+		break;
+	default:
+		ulBaud = 115200;
+		break;
+	}
+
+	/* Calculate buad rate.  */
+	ulClockFreqHz = BD_BCM63XX_TIMER_CLOCK_INPUT;
+	ulTmp = (ulClockFreqHz / ulBaud) / 16;
+	if (ulTmp & 0x01)
+		ulTmp /= 2;	/* Rounding up, so sub is already accounted for */
+	else
+		ulTmp = (ulTmp / 2) - 1;	/* Rounding down so we must sub 1 */
+	pUart->baudword = ulTmp;
+
+	/* Set character size, stop bits and parity.  */
+	switch (cFlag & CSIZE) {
+	case CS5:
+		ulTmp = BITS5SYM;	/* select transmit 5 bit data size */
+		break;
+	case CS6:
+		ulTmp = BITS6SYM;	/* select transmit 6 bit data size */
+		break;
+	case CS7:
+		ulTmp = BITS7SYM;	/* select transmit 7 bit data size */
+		break;
+	default:
+		ulTmp = BITS8SYM;	/* select transmit 8 bit data size */
+		break;
+	}
+	if (cFlag & CSTOPB)
+		ulTmp |= TWOSTOP;	/* select 2 stop bits */
+	else
+		ulTmp |= ONESTOP;	/* select one stop bit */
+
+	/* Write these values into the config reg.  */
+	pUart->config = ulTmp;
+	pUart->control &=
+	    ~(RXPARITYEN | TXPARITYEN | RXPARITYEVEN | TXPARITYEVEN);
+	switch (cFlag & (PARENB | PARODD)) {
+	case PARENB | PARODD:
+		pUart->control |= RXPARITYEN | TXPARITYEN;
+		break;
+	case PARENB:
+		pUart->control |=
+		    RXPARITYEN | TXPARITYEN | RXPARITYEVEN | TXPARITYEVEN;
+		break;
+	default:
+		pUart->control |= 0;
+		break;
+	}
+
+	/* Reset and flush uart */
+	pUart->fifoctl = RSTTXFIFOS | RSTRXFIFOS;
+	spin_unlock_irqrestore(&bcm963xx_serial_lock, ulFlags);
+}
+
+
+/* 
+ * -------------------------------------------------------------------
+ * bcm_flush_char ()
+ *
+ * Nothing to flush.  Polled I/O is used.
+ * ------------------------------------------------------------------- 
+ */
+static void bcm63xx_cons_flush_chars(struct tty_struct *tty)
+{
+}
+
+
+/* 
+ * -------------------------------------------------------------------
+ * bcm63xx_cons_write ()
+ *
+ * Main output routine using polled I/O.
+ * ------------------------------------------------------------------- 
+ */
+static int bcm63xx_cons_write(struct tty_struct *tty,
+			      const unsigned char *buf, int count)
+{
+	int c;
+
+	for (c = 0; c < count; c++)
+		_putc(buf[c]);
+	return count;
+}
+
+/* 
+ * -------------------------------------------------------------------
+ * bcm63xx_cons_write_room ()
+ *
+ * Compute the amount of space available for writing.
+ * ------------------------------------------------------------------- 
+ */
+static int bcm63xx_cons_write_room(struct tty_struct *tty)
+{
+	/* Pick a number.  Any number.  Polled I/O is used. */
+	return 1024;
+}
+
+/* 
+ * -------------------------------------------------------------------
+ * bcm_chars_in_buffer ()
+ *
+ * compute the amount of char left to be transmitted
+ * ------------------------------------------------------------------- 
+ */
+static int bcm_chars_in_buffer(struct tty_struct *tty)
+{
+	return 0;
+}
+
+/* 
+ * -------------------------------------------------------------------
+ * bcm_flush_buffer ()
+ *
+ * Empty the output buffer
+ * ------------------------------------------------------------------- 
+ */
+static void bcm_flush_buffer(struct tty_struct *tty)
+{
+	tty_wakeup(tty);
+}
+
+/*
+ * ------------------------------------------------------------
+ * bcm_throttle () and bcm_unthrottle ()
+ * 
+ * This routine is called by the upper-layer tty layer to signal that
+ * incoming characters should be throttled (or not).
+ * ------------------------------------------------------------
+ */
+static void bcm_throttle(struct tty_struct *tty)
+{
+	struct bcm_serial *info = (struct bcm_serial *) tty->driver_data;
+	if (I_IXOFF(tty))
+		info->x_char = STOP_CHAR(tty);
+}
+
+static void bcm_unthrottle(struct tty_struct *tty)
+{
+	struct bcm_serial *info = (struct bcm_serial *) tty->driver_data;
+	if (I_IXOFF(tty)) {
+		if (info->x_char)
+			info->x_char = 0;
+		else
+			info->x_char = START_CHAR(tty);
+	}
+}
+
+static void bcm_send_xchar(struct tty_struct *tty, char ch)
+{
+	struct bcm_serial *info = (struct bcm_serial *) tty->driver_data;
+	info->x_char = ch;
+	if (ch)
+		bcm_start(info->tty);
+}
+
+/*
+ * ------------------------------------------------------------
+ * rs_ioctl () and friends
+ * ------------------------------------------------------------
+ */
+static int get_serial_info(struct bcm_serial *info,
+			   struct serial_struct *retinfo)
+{
+	struct serial_struct tmp;
+
+	if (!retinfo)
+		return -EFAULT;
+
+	memset(&tmp, 0, sizeof(tmp));
+	tmp.type = info->type;
+	tmp.line = info->line;
+	tmp.port = (int) info->port;
+	tmp.irq = info->irq;
+	tmp.flags = 0;
+	tmp.baud_base = info->baud_base;
+	tmp.close_delay = info->close_delay;
+	tmp.closing_wait = info->closing_wait;
+
+	return copy_to_user(retinfo, &tmp, sizeof(*retinfo));
+}
+
+static int set_serial_info(struct bcm_serial *info,
+			   struct serial_struct *new_info)
+{
+	struct serial_struct new_serial;
+	struct bcm_serial old_info;
+	int retval = 0;
+
+	if (!new_info)
+		return -EFAULT;
+
+	copy_from_user(&new_serial, new_info, sizeof(new_serial));
+	old_info = *info;
+
+	if (!capable(CAP_SYS_ADMIN))
+		return -EPERM;
+
+
+	if (info->count > 1)
+		return -EBUSY;
+
+	/* OK, past this point, all the error checking has been done.
+	 * At this point, we start making changes.....
+	 */
+	info->baud_base = new_serial.baud_base;
+	info->type = new_serial.type;
+	info->close_delay = new_serial.close_delay;
+	info->closing_wait = new_serial.closing_wait;
+	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 bcm_serial *info, unsigned int *value)
+{
+	return (0);
+}
+
+/*
+ * This routine sends a break character out the serial port.
+ */
+static void send_break(struct bcm_serial *info, int duration)
+{
+	unsigned long flags;
+
+	if (!info->port)
+		return;
+
+	current->state = TASK_INTERRUPTIBLE;
+
+	/*save_flags (flags);
+	   cli(); */
+	spin_lock_irqsave(&bcm963xx_serial_lock, flags);
+
+	info->port->control |= XMITBREAK;
+	schedule_timeout(duration);
+	info->port->control &= ~XMITBREAK;
+
+	spin_unlock_irqrestore(&bcm963xx_serial_lock, flags);
+	//restore_flags (flags);
+}
+
+static int bcm_ioctl(struct tty_struct *tty, struct file *file,
+		     unsigned int cmd, unsigned long arg)
+{
+	int error;
+	struct bcm_serial *info = (struct bcm_serial *) tty->driver_data;
+	int retval;
+
+	if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) &&
+	    (cmd != TIOCSERCONFIG) && (cmd != TIOCSERGWILD) &&
+	    (cmd != TIOCSERSWILD) && (cmd != TIOCSERGSTRUCT)) {
+		if (tty->flags & (1 << TTY_IO_ERROR))
+			return -EIO;
+	}
+	switch (cmd) {
+
+	case TCSBRK:		/* SVID version: non-zero arg --> no break */
+		retval = tty_check_change(tty);
+		if (retval)
+			return retval;
+		tty_wait_until_sent(tty, 0);
+		if (!arg)
+			send_break(info, HZ / 4);	/* 1/4 second */
+		return 0;
+
+	case TCSBRKP:		/* support for POSIX tcsendbreak() */
+		retval = tty_check_change(tty);
+		if (retval)
+			return retval;
+		tty_wait_until_sent(tty, 0);
+		send_break(info, arg ? arg * (HZ / 10) : HZ / 4);
+		return 0;
+
+	case TIOCGSOFTCAR:
+		error =
+		    access_ok(VERIFY_WRITE, (void *) arg, sizeof(long));
+		if (!error)
+			return -EFAULT;
+		else {
+			put_user(C_CLOCAL(tty) ? 1 : 0,
+				 (unsigned long *) arg);
+			return 0;
+		}
+
+	case TIOCSSOFTCAR:
+		error = get_user(arg, (unsigned long *) arg);
+		if (error)
+			return error;
+		tty->termios->c_cflag =
+		    ((tty->termios->
+		      c_cflag & ~CLOCAL) | (arg ? CLOCAL : 0));
+		return 0;
+
+	case TIOCGSERIAL:
+		error =
+		    access_ok(VERIFY_WRITE, (void *) arg,
+			      sizeof(struct serial_struct));
+		if (!error)
+			return -EFAULT;
+		else
+			return get_serial_info(info,
+					       (struct serial_struct *)
+					       arg);
+
+	case TIOCSSERIAL:
+		return set_serial_info(info, (struct serial_struct *) arg);
+
+	case TIOCSERGETLSR:	/* Get line status register */
+		error =
+		    access_ok(VERIFY_WRITE, (void *) arg,
+			      sizeof(unsigned int));
+		if (!error)
+			return -EFAULT;
+		else
+			return get_lsr_info(info, (unsigned int *) arg);
+
+	case TIOCSERGSTRUCT:
+		error =
+		    access_ok(VERIFY_WRITE, (void *) arg,
+			      sizeof(struct bcm_serial));
+		if (!error)
+			return -EFAULT;
+		else {
+			copy_to_user((struct bcm_serial *) arg, info,
+				     sizeof(struct bcm_serial));
+			return 0;
+		}
+
+	default:
+		return -ENOIOCTLCMD;
+	}
+	return 0;
+}
+
+static void bcm_set_termios(struct tty_struct *tty,
+			    struct ktermios *old_termios)
+{
+	struct bcm_serial *info = (struct bcm_serial *) tty->driver_data;
+
+	if (tty->termios->c_cflag != old_termios->c_cflag)
+		change_speed(info->port, tty->termios->c_cflag);
+}
+
+/*
+ * ------------------------------------------------------------
+ * bcm63xx_cons_close()
+ * 
+ * This routine is called when the serial port gets closed.  First, we
+ * wait for the last remaining data to be sent.  Then, we turn off
+ * the transmit enable and receive enable flags.
+ * ------------------------------------------------------------
+ */
+static void bcm63xx_cons_close(struct tty_struct *tty, struct file *filp)
+{
+	struct bcm_serial *info = (struct bcm_serial *) tty->driver_data;
+	unsigned long flags;
+
+	if (!info)
+		return;
+
+	/*save_flags (flags); 
+	   cli(); */
+	spin_lock_irqsave(&bcm963xx_serial_lock, flags);
+
+	if (tty_hung_up_p(filp)) {
+		spin_unlock_irqrestore(&bcm963xx_serial_lock, flags);
+		//restore_flags (flags);
+		return;
+	}
+
+	if ((tty->count == 1) && (info->count != 1)) {
+
+		/* Uh, oh.  tty->count is 1, which means that the tty
+		 * structure will be freed.  Info->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
+		    ("bcm63xx_cons_close: bad serial port count; tty->count is 1, "
+		     "info->count is %d\n", info->count);
+		info->count = 1;
+	}
+
+	if (--info->count < 0) {
+		printk("ds_close: bad serial port count for ttys%d: %d\n",
+		       info->line, info->count);
+		info->count = 0;
+	}
+
+	if (info->count) {
+		//restore_flags (flags);
+		spin_unlock_irqrestore(&bcm963xx_serial_lock, flags);
+		return;
+	}
+
+	/* Now we wait for the transmit buffer to clear; and we notify 
+	 * the line discipline to only process XON/XOFF characters.
+	 */
+	tty->closing = 1;
+
+	/* At this point we stop accepting input.  To do this, we
+	 * disable the receive line status interrupts.
+	 */
+	shutdown(info);
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
+	if (tty->driver->flush_buffer)
+		tty->driver->flush_buffer(tty);
+#else
+	if (tty->driver.flush_buffer)
+		tty->driver.flush_buffer(tty);
+#endif
+	if (tty->ldisc.flush_buffer)
+		tty->ldisc.flush_buffer(tty);
+
+	tty->closing = 0;
+	info->event = 0;
+	info->tty = 0;
+	if (tty->ldisc.num != tty_ldisc_get(N_TTY)->num) {
+		if (tty->ldisc.close)
+			(tty->ldisc.close) (tty);
+		tty->ldisc = *tty_ldisc_get(N_TTY);
+		tty->termios->c_line = N_TTY;
+		if (tty->ldisc.open)
+			(tty->ldisc.open) (tty);
+	}
+	if (info->blocked_open) {
+		if (info->close_delay) {
+			current->state = TASK_INTERRUPTIBLE;
+			schedule_timeout(info->close_delay);
+		}
+		wake_up_interruptible(&info->open_wait);
+	}
+	wake_up_interruptible(&info->close_wait);
+
+	//restore_flags (flags);
+	spin_unlock_irqrestore(&bcm963xx_serial_lock, flags);
+}
+
+/*
+ * bcm_hangup () --- called by tty_hangup() when a hangup is signaled.
+ */
+static void bcm_hangup(struct tty_struct *tty)
+{
+
+	struct bcm_serial *info = (struct bcm_serial *) tty->driver_data;
+
+	shutdown(info);
+	info->event = 0;
+	info->count = 0;
+	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 bcm_serial *info)
+{
+	return 0;
+}
+
+/*
+ * This routine is called whenever a serial port is opened.  It
+ * enables interrupts for a serial port. It also performs the 
+ * serial-specific initialization for the tty structure.
+ */
+static int bcm63xx_cons_open(struct tty_struct *tty, struct file *filp)
+{
+	struct bcm_serial *info;
+	int retval, line;
+
+	// Make sure we're only opening on of the ports we support
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
+	line = MINOR(tty->driver->cdev.dev) - tty->driver->minor_start;
+#else
+	line = MINOR(tty->device) - tty->driver.minor_start;
+#endif
+
+	if ((line < 0) || (line >= BCM_NUM_UARTS))
+		return -ENODEV;
+
+	info = lines[line];
+
+	tty->low_latency = 1;
+	info->port->intMask = 0;	/* Clear any pending interrupts */
+	info->port->intMask = RXINT;	/* Enable RX */
+
+	info->count++;
+	tty->driver_data = info;
+	info->tty = tty;
+	enable_brcm_irq(INTERRUPT_ID_UART);
+
+	// Start up serial port
+	retval = startup(info);
+	if (retval)
+		return retval;
+
+	retval = block_til_ready(tty, filp, info);
+	if (retval)
+		return retval;
+
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
+	info->pgrp = process_group(current);
+#else
+	info->session = current->session;
+	info->pgrp = current->pgrp;
+#endif
+
+	return 0;
+}
+
+
+static struct tty_operations rs_ops = {
+	.open = bcm63xx_cons_open,
+	.close = bcm63xx_cons_close,
+	.write = bcm63xx_cons_write,
+	.flush_chars = bcm63xx_cons_flush_chars,
+	.write_room = bcm63xx_cons_write_room,
+	.chars_in_buffer = bcm_chars_in_buffer,
+	.flush_buffer = bcm_flush_buffer,
+	.ioctl = bcm_ioctl,
+	.throttle = bcm_throttle,
+	.unthrottle = bcm_unthrottle,
+	.send_xchar = bcm_send_xchar,
+	.set_termios = bcm_set_termios,
+	.stop = bcm_stop,
+	.start = bcm_start,
+	.hangup = bcm_hangup,
+};
+
+/* --------------------------------------------------------------------------
+    Name: bcm63xx_serialinit
+ Purpose: Initialize our BCM63xx serial driver
+-------------------------------------------------------------------------- */
+static int __init bcm63xx_serialinit(void)
+{
+	int i, flags;
+	struct bcm_serial *info;
+
+	// Print the driver version information
+	printk(VER_STR);
+	serial_driver = alloc_tty_driver(BCM_NUM_UARTS);
+	if (!serial_driver)
+		return -ENOMEM;
+
+	serial_driver->owner = THIS_MODULE;
+	serial_driver->name = "ttyS";
+	serial_driver->major = TTY_MAJOR;
+	serial_driver->minor_start = 64;
+	serial_driver->num = 1;
+	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 = B115200 | CS8 | CREAD | HUPCL | CLOCAL;
+	serial_driver->flags = TTY_DRIVER_REAL_RAW;
+
+	serial_driver->termios = serial_termios;
+	serial_driver->termios_locked = serial_termios_locked;
+
+	tty_set_operations(serial_driver, &rs_ops);
+
+	if (tty_register_driver(serial_driver))
+		panic("Couldn't register serial driver\n");
+
+	//save_flags(flags); cli();
+	spin_lock_irqsave(&bcm963xx_serial_lock, flags);
+
+	for (i = 0; i < 1; i++) {
+		info = &multi[i];
+		lines[i] = info;
+		info->magic = SERIAL_MAGIC;
+		info->port = (Uart *) ((char *) UART_BASE + (i * 0x20));
+		info->tty = 0;
+		info->irq = (2 - i) + 8;
+		info->line = i;
+		info->close_delay = 50;
+		info->closing_wait = 3000;
+		info->x_char = 0;
+		info->event = 0;
+		info->count = 0;
+		info->blocked_open = 0;
+		info->normal_termios = serial_driver->init_termios;
+		init_waitqueue_head(&info->open_wait);
+		init_waitqueue_head(&info->close_wait);
+
+		/* If we are pointing to address zero then punt - not correctly
+		 * set up in setup.c to handle this. 
+		 */
+		if (!info->port)
+			return 0;
+		BcmHalMapInterrupt(bcm_interrupt, 0, INTERRUPT_ID_UART);
+	}
+
+	/* order matters here... the trick is that flags
+	 * is updated... in request_irq - to immediatedly obliterate
+	 * it is unwise. 
+	 */
+	spin_unlock_irqrestore(&bcm963xx_serial_lock, flags);
+	return 0;
+}
+
+module_init(bcm63xx_serialinit);
+
+/* --------------------------------------------------------------------------
+    Name: bcm_console_print
+ Purpose: bcm_console_print is registered for printk.
+          The console_lock must be held when we get here.
+-------------------------------------------------------------------------- */
+static void bcm_console_print(struct console *cons, const char *str,
+			      unsigned int count)
+{
+	unsigned int i;
+	//_puts(str);
+	for (i = 0; i < count; i++, str++) {
+		_putc(*str);
+		if (*str == 10) {
+			_putc(13);
+		}
+	}
+}
+
+static struct tty_driver *bcm_console_device(struct console *c, int *index)
+{
+	*index = c->index;
+	return serial_driver;
+}
+
+static int __init bcm_console_setup(struct console *co, char *options)
+{
+	return 0;
+}
+
+static struct console bcm_sercons = {
+	.name = "ttyS",
+	.write = bcm_console_print,
+	.device = bcm_console_device,
+	.setup = bcm_console_setup,
+	.flags = CON_PRINTBUFFER,
+	.index = -1,
+};
+
+static int __init bcm63xx_console_init(void)
+{
+	register_console(&bcm_sercons);
+	return 0;
+}
+
+console_initcall(bcm63xx_console_init);