Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 2858 insertions, 0 deletions

diff --git a/drivers/char/serial167.c b/drivers/char/serial167.c
new file mode 100644
index 000000000000..c2deac968bdd
--- /dev/null
+++ b/drivers/char/serial167.c
@@ -0,0 +1,2858 @@
+/*
+ * linux/drivers/char/serial167.c
+ *
+ * Driver for MVME166/7 board serial ports, which are via a CD2401.
+ * Based very much on cyclades.c.
+ *
+ * MVME166/7 work by Richard Hirst [richard@sleepie.demon.co.uk]
+ *
+ * ==============================================================
+ *
+ * static char rcsid[] =
+ * "$Revision: 1.36.1.4 $$Date: 1995/03/29 06:14:14 $";
+ *
+ *  linux/kernel/cyclades.c
+ *
+ * Maintained by Marcio Saito (cyclades@netcom.com) and
+ * Randolph Bentson (bentson@grieg.seaslug.org)
+ *
+ * Much of the design and some of the code came from serial.c
+ * which was copyright (C) 1991, 1992  Linus Torvalds.  It was
+ * extensively rewritten by Theodore Ts'o, 8/16/92 -- 9/14/92,
+ * and then fixed as suggested by Michael K. Johnson 12/12/92.
+ *
+ * This version does not support shared irq's.
+ *
+ * $Log: cyclades.c,v $
+ * Revision 1.36.1.4  1995/03/29  06:14:14  bentson
+ * disambiguate between Cyclom-16Y and Cyclom-32Ye;
+ *
+ * Changes:
+ *
+ * 200 lines of changes record removed - RGH 11-10-95, starting work on
+ * converting this to drive serial ports on mvme166 (cd2401).
+ *
+ * Arnaldo Carvalho de Melo <acme@conectiva.com.br> - 2000/08/25
+ * - get rid of verify_area
+ * - use get_user to access memory from userspace in set_threshold,
+ *   set_default_threshold and set_timeout
+ * - don't use the panic function in serial167_init
+ * - do resource release on failure on serial167_init
+ * - include missing restore_flags in mvme167_serial_console_setup
+ *
+ * Kars de Jong <jongk@linux-m68k.org> - 2004/09/06
+ * - replace bottom half handler with task queue handler
+ */
+
+#include <linux/config.h>
+#include <linux/errno.h>
+#include <linux/signal.h>
+#include <linux/sched.h>
+#include <linux/timer.h>
+#include <linux/tty.h>
+#include <linux/interrupt.h>
+#include <linux/serial.h>
+#include <linux/serialP.h>
+#include <linux/string.h>
+#include <linux/fcntl.h>
+#include <linux/ptrace.h>
+#include <linux/serial167.h>
+#include <linux/delay.h>
+#include <linux/major.h>
+#include <linux/mm.h>
+#include <linux/console.h>
+#include <linux/module.h>
+#include <linux/bitops.h>
+
+#include <asm/system.h>
+#include <asm/io.h>
+#include <asm/mvme16xhw.h>
+#include <asm/bootinfo.h>
+#include <asm/setup.h>
+
+#include <linux/types.h>
+#include <linux/kernel.h>
+
+#include <asm/uaccess.h>
+#include <linux/init.h>
+
+#define SERIAL_PARANOIA_CHECK
+#undef  SERIAL_DEBUG_OPEN
+#undef  SERIAL_DEBUG_THROTTLE
+#undef  SERIAL_DEBUG_OTHER
+#undef  SERIAL_DEBUG_IO
+#undef  SERIAL_DEBUG_COUNT
+#undef  SERIAL_DEBUG_DTR
+#undef  CYCLOM_16Y_HACK
+#define  CYCLOM_ENABLE_MONITORING
+
+#define WAKEUP_CHARS 256
+
+#define STD_COM_FLAGS (0)
+
+#define SERIAL_TYPE_NORMAL  1
+
+static struct tty_driver *cy_serial_driver;
+extern int serial_console;
+static struct cyclades_port *serial_console_info = NULL;
+static unsigned int serial_console_cflag = 0;
+u_char initial_console_speed;
+
+/* Base address of cd2401 chip on mvme166/7 */
+
+#define BASE_ADDR (0xfff45000)
+#define pcc2chip	((volatile u_char *)0xfff42000)
+#define PccSCCMICR	0x1d
+#define PccSCCTICR	0x1e
+#define PccSCCRICR	0x1f
+#define PccTPIACKR	0x25
+#define PccRPIACKR	0x27
+#define PccIMLR		0x3f
+
+/* This is the per-port data structure */
+struct cyclades_port cy_port[] = {
+      /* CARD#  */
+        {-1 },      /* ttyS0 */
+        {-1 },      /* ttyS1 */
+        {-1 },      /* ttyS2 */
+        {-1 },      /* ttyS3 */
+};
+#define NR_PORTS        (sizeof(cy_port)/sizeof(struct cyclades_port))
+
+/*
+ * 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 = 0;
+DECLARE_MUTEX(tmp_buf_sem);
+
+/*
+ * This is used to look up the divisor speeds and the timeouts
+ * We're normally limited to 15 distinct baud rates.  The extra
+ * are accessed via settings in info->flags.
+ *         0,     1,     2,     3,     4,     5,     6,     7,     8,     9,
+ *        10,    11,    12,    13,    14,    15,    16,    17,    18,    19,
+ *                                                  HI            VHI
+ */
+static int baud_table[] = {
+           0,    50,    75,   110,   134,   150,   200,   300,   600,  1200,
+        1800,  2400,  4800,  9600, 19200, 38400, 57600, 76800,115200,150000,
+        0};
+
+#if 0
+static char baud_co[] = {  /* 25 MHz clock option table */
+        /* value =>    00    01   02    03    04 */
+        /* divide by    8    32   128   512  2048 */
+        0x00,  0x04,  0x04,  0x04,  0x04,  0x04,  0x03,  0x03,  0x03,  0x02,
+        0x02,  0x02,  0x01,  0x01,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00};
+
+static char baud_bpr[] = {  /* 25 MHz baud rate period table */
+        0x00,  0xf5,  0xa3,  0x6f,  0x5c,  0x51,  0xf5,  0xa3,  0x51,  0xa3,
+        0x6d,  0x51,  0xa3,  0x51,  0xa3,  0x51,  0x36,  0x29,  0x1b,  0x15};
+#endif
+
+/* I think 166 brd clocks 2401 at 20MHz.... */
+
+/* These values are written directly to tcor, and >> 5 for writing to rcor */
+static u_char baud_co[] = {  /* 20 MHz clock option table */
+        0x00,  0x80,  0x80,  0x80,  0x80,  0x80,  0x80,  0x60,  0x60,  0x40,
+        0x40,  0x40,  0x20,  0x20,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00};
+
+/* These values written directly to tbpr/rbpr */
+static u_char baud_bpr[] = {  /* 20 MHz baud rate period table */
+        0x00,  0xc0,  0x80,  0x58,  0x6c,  0x40,  0xc0,  0x81,  0x40,  0x81,
+        0x57,  0x40,  0x81,  0x40,  0x81,  0x40,  0x2b,  0x20,  0x15,  0x10};
+
+static u_char baud_cor4[] = {  /* receive threshold */
+        0x0a,  0x0a,  0x0a,  0x0a,  0x0a,  0x0a,  0x0a,  0x0a,  0x0a,  0x0a,
+        0x0a,  0x0a,  0x0a,  0x09,  0x09,  0x08,  0x08,  0x08,  0x08,  0x07};
+
+
+
+static void shutdown(struct cyclades_port *);
+static int startup (struct cyclades_port *);
+static void cy_throttle(struct tty_struct *);
+static void cy_unthrottle(struct tty_struct *);
+static void config_setup(struct cyclades_port *);
+extern void console_print(const char *);
+#ifdef CYCLOM_SHOW_STATUS
+static void show_status(int);
+#endif
+
+#ifdef CONFIG_REMOTE_DEBUG
+static void debug_setup(void);
+void queueDebugChar (int c);
+int getDebugChar(void);
+
+#define DEBUG_PORT	1
+#define DEBUG_LEN	256
+
+typedef struct {
+	int	in;
+	int	out;
+	unsigned char	buf[DEBUG_LEN];
+} debugq;
+
+debugq debugiq;
+#endif
+
+/*
+ * I have my own version of udelay(), as it is needed when initialising
+ * the chip, before the delay loop has been calibrated.  Should probably
+ * reference one of the vmechip2 or pccchip2 counter for an accurate
+ * delay, but this wild guess will do for now.
+ */
+
+void my_udelay (long us)
+{
+	u_char x;
+	volatile u_char *p = &x;
+	int i;
+
+	while (us--)
+		for (i = 100; i; i--)
+			x |= *p;
+}
+
+static inline int
+serial_paranoia_check(struct cyclades_port *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 cyclades_port for (%s) in %s\n";
+    static const char *badrange =
+	"Warning: cyclades_port out of range for (%s) in %s\n";
+
+    if (!info) {
+	printk(badinfo, name, routine);
+	return 1;
+    }
+
+    if( (long)info < (long)(&cy_port[0])
+    || (long)(&cy_port[NR_PORTS]) < (long)info ){
+	printk(badrange, name, routine);
+	return 1;
+    }
+
+    if (info->magic != CYCLADES_MAGIC) {
+	printk(badmagic, name, routine);
+	return 1;
+    }
+#endif
+	return 0;
+} /* serial_paranoia_check */
+
+#if 0
+/* The following diagnostic routines allow the driver to spew
+   information on the screen, even (especially!) during interrupts.
+ */
+void
+SP(char *data){
+  unsigned long flags;
+    local_irq_save(flags);
+        console_print(data);
+    local_irq_restore(flags);
+}
+char scrn[2];
+void
+CP(char data){
+  unsigned long flags;
+    local_irq_save(flags);
+        scrn[0] = data;
+        console_print(scrn);
+    local_irq_restore(flags);
+}/* CP */
+
+void CP1(int data) { (data<10)?  CP(data+'0'): CP(data+'A'-10); }/* CP1 */
+void CP2(int data) { CP1((data>>4) & 0x0f); CP1( data & 0x0f); }/* CP2 */
+void CP4(int data) { CP2((data>>8) & 0xff); CP2(data & 0xff); }/* CP4 */
+void CP8(long data) { CP4((data>>16) & 0xffff); CP4(data & 0xffff); }/* CP8 */
+#endif
+
+/* This routine waits up to 1000 micro-seconds for the previous
+   command to the Cirrus chip to complete and then issues the
+   new command.  An error is returned if the previous command
+   didn't finish within the time limit.
+ */
+u_short
+write_cy_cmd(volatile u_char *base_addr, u_char cmd)
+{
+  unsigned long flags;
+  volatile int  i;
+
+    local_irq_save(flags);
+	/* Check to see that the previous command has completed */
+	for(i = 0 ; i < 100 ; i++){
+	    if (base_addr[CyCCR] == 0){
+		break;
+	    }
+	    my_udelay(10L);
+	}
+	/* if the CCR never cleared, the previous command
+	    didn't finish within the "reasonable time" */
+	if ( i == 10 ) {
+	    local_irq_restore(flags);
+	    return (-1);
+	}
+
+	/* Issue the new command */
+	base_addr[CyCCR] = cmd;
+    local_irq_restore(flags);
+    return(0);
+} /* write_cy_cmd */
+
+
+/* cy_start and cy_stop provide software output flow control as a
+   function of XON/XOFF, software CTS, and other such stuff. */
+
+static void
+cy_stop(struct tty_struct *tty)
+{
+  struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
+  volatile unsigned char *base_addr = (unsigned char *)BASE_ADDR;
+  int channel;
+  unsigned long flags;
+
+#ifdef SERIAL_DEBUG_OTHER
+    printk("cy_stop %s\n", tty->name); /* */
+#endif
+
+    if (serial_paranoia_check(info, tty->name, "cy_stop"))
+	return;
+	
+    channel = info->line;
+
+    local_irq_save(flags);
+        base_addr[CyCAR] = (u_char)(channel); /* index channel */
+        base_addr[CyIER] &= ~(CyTxMpty|CyTxRdy);
+    local_irq_restore(flags);
+
+    return;
+} /* cy_stop */
+
+static void
+cy_start(struct tty_struct *tty)
+{
+  struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
+  volatile unsigned char *base_addr = (unsigned char *)BASE_ADDR;
+  int channel;
+  unsigned long flags;
+
+#ifdef SERIAL_DEBUG_OTHER
+    printk("cy_start %s\n", tty->name); /* */
+#endif
+
+    if (serial_paranoia_check(info, tty->name, "cy_start"))
+	return;
+	
+    channel = info->line;
+
+    local_irq_save(flags);
+        base_addr[CyCAR] = (u_char)(channel);
+        base_addr[CyIER] |= CyTxMpty;
+    local_irq_restore(flags);
+
+    return;
+} /* cy_start */
+
+
+/*
+ * This routine is used by the interrupt handler to schedule
+ * processing in the software interrupt portion of the driver
+ * (also known as the "bottom half").  This can be called any
+ * number of times for any channel without harm.
+ */
+static inline void
+cy_sched_event(struct cyclades_port *info, int event)
+{
+    info->event |= 1 << event; /* remember what kind of event and who */
+    schedule_work(&info->tqueue);
+} /* cy_sched_event */
+
+
+/* The real interrupt service routines are called
+   whenever the card wants its hand held--chars
+   received, out buffer empty, modem change, etc.
+ */
+static irqreturn_t
+cd2401_rxerr_interrupt(int irq, void *dev_id, struct pt_regs *fp)
+{
+    struct tty_struct *tty;
+    struct cyclades_port *info;
+    volatile unsigned char *base_addr = (unsigned char *)BASE_ADDR;
+    unsigned char err, rfoc;
+    int channel;
+    char data;
+
+    /* determine the channel and change to that context */
+    channel = (u_short ) (base_addr[CyLICR] >> 2);
+    info = &cy_port[channel];
+    info->last_active = jiffies;
+
+    if ((err = base_addr[CyRISR]) & CyTIMEOUT) {
+	/* This is a receive timeout interrupt, ignore it */
+	base_addr[CyREOIR] = CyNOTRANS;
+	return IRQ_HANDLED;
+    }
+
+    /* Read a byte of data if there is any - assume the error
+     * is associated with this character */
+
+    if ((rfoc = base_addr[CyRFOC]) != 0)
+	data = base_addr[CyRDR];
+    else
+	data = 0;
+
+    /* if there is nowhere to put the data, discard it */
+    if(info->tty == 0) {
+	base_addr[CyREOIR] = rfoc ? 0 : CyNOTRANS;
+	return IRQ_HANDLED;
+    }
+    else { /* there is an open port for this data */
+	tty = info->tty;
+	if(err & info->ignore_status_mask){
+	    base_addr[CyREOIR] = rfoc ? 0 : CyNOTRANS;
+	    return IRQ_HANDLED;
+	}
+	if (tty->flip.count < TTY_FLIPBUF_SIZE){
+	    tty->flip.count++;
+	    if (err & info->read_status_mask){
+		if(err & CyBREAK){
+		    *tty->flip.flag_buf_ptr++ = TTY_BREAK;
+		    *tty->flip.char_buf_ptr++ = data;
+		    if (info->flags & ASYNC_SAK){
+			do_SAK(tty);
+		    }
+		}else if(err & CyFRAME){
+		    *tty->flip.flag_buf_ptr++ = TTY_FRAME;
+		    *tty->flip.char_buf_ptr++ = data;
+		}else if(err & CyPARITY){
+		    *tty->flip.flag_buf_ptr++ = TTY_PARITY;
+		    *tty->flip.char_buf_ptr++ = data;
+		}else if(err & CyOVERRUN){
+		    *tty->flip.flag_buf_ptr++ = TTY_OVERRUN;
+		    *tty->flip.char_buf_ptr++ = 0;
+		    /*
+		       If the flip buffer itself is
+		       overflowing, we still loose
+		       the next incoming character.
+		     */
+		    if(tty->flip.count < TTY_FLIPBUF_SIZE){
+			tty->flip.count++;
+			*tty->flip.flag_buf_ptr++ = TTY_NORMAL;
+			*tty->flip.char_buf_ptr++ = data;
+		    }
+		/* These two conditions may imply */
+		/* a normal read should be done. */
+		/* else if(data & CyTIMEOUT) */
+		/* else if(data & CySPECHAR) */
+		}else{
+		    *tty->flip.flag_buf_ptr++ = 0;
+		    *tty->flip.char_buf_ptr++ = 0;
+		}
+	    }else{
+		*tty->flip.flag_buf_ptr++ = 0;
+		*tty->flip.char_buf_ptr++ = 0;
+	    }
+	}else{
+	    /* there was a software buffer overrun
+	       and nothing could be done about it!!! */
+	}
+    }
+    schedule_delayed_work(&tty->flip.work, 1);
+    /* end of service */
+    base_addr[CyREOIR] = rfoc ? 0 : CyNOTRANS;
+    return IRQ_HANDLED;
+} /* cy_rxerr_interrupt */
+
+static irqreturn_t
+cd2401_modem_interrupt(int irq, void *dev_id, struct pt_regs *fp)
+{
+    struct cyclades_port *info;
+    volatile unsigned char *base_addr = (unsigned char *)BASE_ADDR;
+    int channel;
+    int mdm_change;
+    int mdm_status;
+
+
+    /* determine the channel and change to that context */
+    channel = (u_short ) (base_addr[CyLICR] >> 2);
+    info = &cy_port[channel];
+    info->last_active = jiffies;
+
+    mdm_change = base_addr[CyMISR];
+    mdm_status = base_addr[CyMSVR1];
+
+    if(info->tty == 0){ /* nowhere to put the data, ignore it */
+	;
+    }else{
+	if((mdm_change & CyDCD)
+	&& (info->flags & ASYNC_CHECK_CD)){
+	    if(mdm_status & CyDCD){
+/* CP('!'); */
+		cy_sched_event(info, Cy_EVENT_OPEN_WAKEUP);
+	    } else {
+/* CP('@'); */
+		cy_sched_event(info, Cy_EVENT_HANGUP);
+	    }
+	}
+	if((mdm_change & CyCTS)
+	&& (info->flags & ASYNC_CTS_FLOW)){
+	    if(info->tty->stopped){
+		if(mdm_status & CyCTS){
+		    /* !!! cy_start isn't used because... */
+		    info->tty->stopped = 0;
+        	    base_addr[CyIER] |= CyTxMpty;
+		    cy_sched_event(info, Cy_EVENT_WRITE_WAKEUP);
+		}
+	    }else{
+		if(!(mdm_status & CyCTS)){
+		    /* !!! cy_stop isn't used because... */
+		    info->tty->stopped = 1;
+        	    base_addr[CyIER] &= ~(CyTxMpty|CyTxRdy);
+		}
+	    }
+	}
+	if(mdm_status & CyDSR){
+	}
+    }
+    base_addr[CyMEOIR] = 0;
+    return IRQ_HANDLED;
+} /* cy_modem_interrupt */
+
+static irqreturn_t
+cd2401_tx_interrupt(int irq, void *dev_id, struct pt_regs *fp)
+{
+    struct cyclades_port *info;
+    volatile unsigned char *base_addr = (unsigned char *)BASE_ADDR;
+    int channel;
+    int char_count, saved_cnt;
+    int outch;
+
+    /* determine the channel and change to that context */
+    channel = (u_short ) (base_addr[CyLICR] >> 2);
+
+#ifdef CONFIG_REMOTE_DEBUG
+    if (channel == DEBUG_PORT) {
+	panic ("TxInt on debug port!!!");
+    }
+#endif
+
+    info = &cy_port[channel];
+
+    /* validate the port number (as configured and open) */
+    if( (channel < 0) || (NR_PORTS <= channel) ){
+	base_addr[CyIER] &= ~(CyTxMpty|CyTxRdy);
+	base_addr[CyTEOIR] = CyNOTRANS;
+	return IRQ_HANDLED;
+    }
+    info->last_active = jiffies;
+    if(info->tty == 0){
+	base_addr[CyIER] &= ~(CyTxMpty|CyTxRdy);
+        if (info->xmit_cnt < WAKEUP_CHARS) {
+	    cy_sched_event(info, Cy_EVENT_WRITE_WAKEUP);
+        }
+	base_addr[CyTEOIR] = CyNOTRANS;
+	return IRQ_HANDLED;
+    }
+
+    /* load the on-chip space available for outbound data */
+    saved_cnt = char_count = base_addr[CyTFTC];
+
+    if(info->x_char) { /* send special char */
+	outch = info->x_char;
+	base_addr[CyTDR] = outch;
+	char_count--;
+	info->x_char = 0;
+    }
+
+    if (info->x_break){
+	/*  The Cirrus chip requires the "Embedded Transmit
+	    Commands" of start break, delay, and end break
+	    sequences to be sent.  The duration of the
+	    break is given in TICs, which runs at HZ
+	    (typically 100) and the PPR runs at 200 Hz,
+	    so the delay is duration * 200/HZ, and thus a
+	    break can run from 1/100 sec to about 5/4 sec.
+	    Need to check these values - RGH 141095.
+	 */
+	base_addr[CyTDR] = 0; /* start break */
+	base_addr[CyTDR] = 0x81;
+	base_addr[CyTDR] = 0; /* delay a bit */
+	base_addr[CyTDR] = 0x82;
+	base_addr[CyTDR] = info->x_break*200/HZ;
+	base_addr[CyTDR] = 0; /* terminate break */
+	base_addr[CyTDR] = 0x83;
+	char_count -= 7;
+	info->x_break = 0;
+    }
+
+    while (char_count > 0){
+	if (!info->xmit_cnt){
+	    base_addr[CyIER] &= ~(CyTxMpty|CyTxRdy);
+	    break;
+	}
+	if (info->xmit_buf == 0){
+	    base_addr[CyIER] &= ~(CyTxMpty|CyTxRdy);
+	    break;
+	}
+	if (info->tty->stopped || info->tty->hw_stopped){
+	    base_addr[CyIER] &= ~(CyTxMpty|CyTxRdy);
+	    break;
+	}
+	/* Because the Embedded Transmit Commands have been
+	   enabled, we must check to see if the escape
+	   character, NULL, is being sent.  If it is, we
+	   must ensure that there is room for it to be
+	   doubled in the output stream.  Therefore we
+	   no longer advance the pointer when the character
+	   is fetched, but rather wait until after the check
+	   for a NULL output character. (This is necessary
+	   because there may not be room for the two chars
+	   needed to send a NULL.
+	 */
+	outch = info->xmit_buf[info->xmit_tail];
+	if( outch ){
+	    info->xmit_cnt--;
+	    info->xmit_tail = (info->xmit_tail + 1)
+				      & (PAGE_SIZE - 1);
+	    base_addr[CyTDR] = outch;
+	    char_count--;
+	}else{
+	    if(char_count > 1){
+		info->xmit_cnt--;
+		info->xmit_tail = (info->xmit_tail + 1)
+					  & (PAGE_SIZE - 1);
+		base_addr[CyTDR] = outch;
+		base_addr[CyTDR] = 0;
+		char_count--;
+		char_count--;
+	    }else{
+		break;
+	    }
+	}
+    }
+
+    if (info->xmit_cnt < WAKEUP_CHARS) {
+	cy_sched_event(info, Cy_EVENT_WRITE_WAKEUP);
+    }
+    base_addr[CyTEOIR] = (char_count != saved_cnt) ? 0 : CyNOTRANS;
+    return IRQ_HANDLED;
+} /* cy_tx_interrupt */
+
+static irqreturn_t
+cd2401_rx_interrupt(int irq, void *dev_id, struct pt_regs *fp)
+{
+    struct tty_struct *tty;
+    struct cyclades_port *info;
+    volatile unsigned char *base_addr = (unsigned char *)BASE_ADDR;
+    int channel;
+    char data;
+    int char_count;
+    int save_cnt;
+
+    /* determine the channel and change to that context */
+    channel = (u_short ) (base_addr[CyLICR] >> 2);
+    info = &cy_port[channel];
+    info->last_active = jiffies;
+    save_cnt = char_count = base_addr[CyRFOC];
+
+#ifdef CONFIG_REMOTE_DEBUG
+    if (channel == DEBUG_PORT) {
+	while (char_count--) {
+            data = base_addr[CyRDR];
+	    queueDebugChar(data);
+	}
+    }
+    else
+#endif
+    /* if there is nowhere to put the data, discard it */
+    if(info->tty == 0){
+	while(char_count--){
+	    data = base_addr[CyRDR];
+	}
+    }else{ /* there is an open port for this data */
+	tty = info->tty;
+	/* load # characters available from the chip */
+
+#ifdef CYCLOM_ENABLE_MONITORING
+	++info->mon.int_count;
+	info->mon.char_count += char_count;
+	if (char_count > info->mon.char_max)
+	    info->mon.char_max = char_count;
+	info->mon.char_last = char_count;
+#endif
+	while(char_count--){
+	    data = base_addr[CyRDR];
+	    if (tty->flip.count >= TTY_FLIPBUF_SIZE){
+		continue;
+	    }
+	    tty->flip.count++;
+	    *tty->flip.flag_buf_ptr++ = TTY_NORMAL;
+	    *tty->flip.char_buf_ptr++ = data;
+#ifdef CYCLOM_16Y_HACK
+	    udelay(10L);
+#endif
+        }
+	schedule_delayed_work(&tty->flip.work, 1);
+    }
+    /* end of service */
+    base_addr[CyREOIR] = save_cnt ? 0 : CyNOTRANS;
+    return IRQ_HANDLED;
+} /* cy_rx_interrupt */
+
+/*
+ * 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
+ * cy#/_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 cy_sched_event(), and they get done here.
+ *
+ * This is done through one level of indirection--the task queue.
+ * When a hardware interrupt service routine wants service by the
+ * driver's bottom half, it enqueues the appropriate tq_struct (one
+ * per port) to the keventd work queue and sets a request flag
+ * that the work queue be processed.
+ *
+ * Although this may seem unwieldy, it gives the system a way to
+ * pass an argument (in this case the pointer to the cyclades_port
+ * structure) to the bottom half of the driver.  Previous kernels
+ * had to poll every port to see if that port needed servicing.
+ */
+static void
+do_softint(void *private_)
+{
+  struct cyclades_port *info = (struct cyclades_port *) private_;
+  struct tty_struct    *tty;
+
+    tty = info->tty;
+    if (!tty)
+	return;
+
+    if (test_and_clear_bit(Cy_EVENT_HANGUP, &info->event)) {
+	tty_hangup(info->tty);
+	wake_up_interruptible(&info->open_wait);
+	info->flags &= ~ASYNC_NORMAL_ACTIVE;
+    }
+    if (test_and_clear_bit(Cy_EVENT_OPEN_WAKEUP, &info->event)) {
+	wake_up_interruptible(&info->open_wait);
+    }
+    if (test_and_clear_bit(Cy_EVENT_WRITE_WAKEUP, &info->event)) {
+    	tty_wakeup(tty);
+    }
+} /* do_softint */
+
+
+/* This is called whenever a port becomes active;
+   interrupts are enabled and DTR & RTS are turned on.
+ */
+static int
+startup(struct cyclades_port * info)
+{
+  unsigned long flags;
+  volatile unsigned char *base_addr = (unsigned char *)BASE_ADDR;
+  int channel;
+
+    if (info->flags & ASYNC_INITIALIZED){
+	return 0;
+    }
+
+    if (!info->type){
+	if (info->tty){
+	    set_bit(TTY_IO_ERROR, &info->tty->flags);
+	}
+	return 0;
+    }
+    if (!info->xmit_buf){
+	info->xmit_buf = (unsigned char *) get_zeroed_page (GFP_KERNEL);
+	if (!info->xmit_buf){
+	    return -ENOMEM;
+	}
+    }
+
+    config_setup(info);
+
+    channel = info->line;
+
+#ifdef SERIAL_DEBUG_OPEN
+    printk("startup channel %d\n", channel);
+#endif
+
+    local_irq_save(flags);
+	base_addr[CyCAR] = (u_char)channel;
+	write_cy_cmd(base_addr,CyENB_RCVR|CyENB_XMTR);
+
+	base_addr[CyCAR] = (u_char)channel; /* !!! Is this needed? */
+	base_addr[CyMSVR1] = CyRTS;
+/* CP('S');CP('1'); */
+	base_addr[CyMSVR2] = CyDTR;
+
+#ifdef SERIAL_DEBUG_DTR
+        printk("cyc: %d: raising DTR\n", __LINE__);
+        printk("     status: 0x%x, 0x%x\n", base_addr[CyMSVR1], base_addr[CyMSVR2]);
+#endif
+
+	base_addr[CyIER] |= CyRxData;
+	info->flags |= ASYNC_INITIALIZED;
+
+	if (info->tty){
+	    clear_bit(TTY_IO_ERROR, &info->tty->flags);
+	}
+	info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
+
+    local_irq_restore(flags);
+
+#ifdef SERIAL_DEBUG_OPEN
+    printk(" done\n");
+#endif
+    return 0;
+} /* startup */
+
+void
+start_xmit( struct cyclades_port *info )
+{
+  unsigned long flags;
+  volatile unsigned char *base_addr = (u_char *)BASE_ADDR;
+  int channel;
+
+    channel = info->line;
+    local_irq_save(flags);
+	base_addr[CyCAR] = channel;
+	base_addr[CyIER] |= CyTxMpty;
+    local_irq_restore(flags);
+} /* start_xmit */
+
+/*
+ * This routine shuts down a serial port; interrupts are disabled,
+ * and DTR is dropped if the hangup on close termio flag is on.
+ */
+static void
+shutdown(struct cyclades_port * info)
+{
+  unsigned long flags;
+  volatile unsigned char *base_addr = (u_char *)BASE_ADDR;
+  int channel;
+
+    if (!(info->flags & ASYNC_INITIALIZED)){
+/* CP('$'); */
+	return;
+    }
+
+    channel = info->line;
+
+#ifdef SERIAL_DEBUG_OPEN
+    printk("shutdown channel %d\n", channel);
+#endif
+
+    /* !!! REALLY MUST WAIT FOR LAST CHARACTER TO BE
+       SENT BEFORE DROPPING THE LINE !!!  (Perhaps
+       set some flag that is read when XMTY happens.)
+       Other choices are to delay some fixed interval
+       or schedule some later processing.
+     */
+    local_irq_save(flags);
+	if (info->xmit_buf){
+	    free_page((unsigned long) info->xmit_buf);
+	    info->xmit_buf = 0;
+	}
+
+	base_addr[CyCAR] = (u_char)channel;
+	if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
+	    base_addr[CyMSVR1] = 0;
+/* CP('C');CP('1'); */
+	    base_addr[CyMSVR2] = 0;
+#ifdef SERIAL_DEBUG_DTR
+            printk("cyc: %d: dropping DTR\n", __LINE__);
+            printk("     status: 0x%x, 0x%x\n", base_addr[CyMSVR1], base_addr[CyMSVR2]);
+#endif
+        }
+	write_cy_cmd(base_addr,CyDIS_RCVR);
+         /* it may be appropriate to clear _XMIT at
+           some later date (after testing)!!! */
+
+	if (info->tty){
+	    set_bit(TTY_IO_ERROR, &info->tty->flags);
+	}
+	info->flags &= ~ASYNC_INITIALIZED;
+    local_irq_restore(flags);
+
+#ifdef SERIAL_DEBUG_OPEN
+    printk(" done\n");
+#endif
+    return;
+} /* shutdown */
+
+/*
+ * This routine finds or computes the various line characteristics.
+ */
+static void
+config_setup(struct cyclades_port * info)
+{
+  unsigned long flags;
+  volatile unsigned char *base_addr = (u_char *)BASE_ADDR;
+  int channel;
+  unsigned cflag;
+  int   i;
+  unsigned char ti, need_init_chan = 0;
+
+    if (!info->tty || !info->tty->termios){
+        return;
+    }
+    if (info->line == -1){
+        return;
+    }
+    cflag = info->tty->termios->c_cflag;
+
+    /* baud rate */
+    i = cflag & CBAUD;
+#ifdef CBAUDEX
+/* Starting with kernel 1.1.65, there is direct support for
+   higher baud rates.  The following code supports those
+   changes.  The conditional aspect allows this driver to be
+   used for earlier as well as later kernel versions.  (The
+   mapping is slightly different from serial.c because there
+   is still the possibility of supporting 75 kbit/sec with
+   the Cyclades board.)
+ */
+    if (i & CBAUDEX) {
+	if (i == B57600)
+	    i = 16;
+	else if(i == B115200) 
+	    i = 18;
+#ifdef B78600
+	else if(i == B78600) 
+	    i = 17;
+#endif
+	else
+	    info->tty->termios->c_cflag &= ~CBAUDEX;
+    }
+#endif
+    if (i == 15) {
+	    if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
+		    i += 1;
+	    if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
+		    i += 3;
+    }
+    /* Don't ever change the speed of the console port.  It will
+     * run at the speed specified in bootinfo, or at 19.2K */
+    /* Actually, it should run at whatever speed 166Bug was using */
+    /* Note info->timeout isn't used at present */
+    if (info != serial_console_info) {
+	info->tbpr = baud_bpr[i]; /* Tx BPR */
+	info->tco = baud_co[i]; /* Tx CO */
+	info->rbpr = baud_bpr[i]; /* Rx BPR */
+	info->rco = baud_co[i] >> 5; /* Rx CO */
+	if (baud_table[i] == 134) {
+            info->timeout = (info->xmit_fifo_size*HZ*30/269) + 2;
+            /* get it right for 134.5 baud */
+	} else if (baud_table[i]) {
+            info->timeout = (info->xmit_fifo_size*HZ*15/baud_table[i]) + 2;
+        /* this needs to be propagated into the card info */
+	} else {
+            info->timeout = 0;
+	}
+    }
+    /* By tradition (is it a standard?) a baud rate of zero
+       implies the line should be/has been closed.  A bit
+       later in this routine such a test is performed. */
+
+    /* byte size and parity */
+    info->cor7 = 0;
+    info->cor6 = 0;
+    info->cor5 = 0;
+    info->cor4 = (info->default_threshold
+		  ? info->default_threshold
+		  : baud_cor4[i]); /* receive threshold */
+    /* Following two lines added 101295, RGH. */
+    /* It is obviously wrong to access CyCORx, and not info->corx here,
+     * try and remember to fix it later! */
+    channel = info->line;
+    base_addr[CyCAR] = (u_char)channel;
+    if (C_CLOCAL(info->tty)) {
+	if (base_addr[CyIER] & CyMdmCh)
+	    base_addr[CyIER] &= ~CyMdmCh; /* without modem intr */
+			       /* ignore 1->0 modem transitions */
+	if (base_addr[CyCOR4] & (CyDSR|CyCTS|CyDCD))
+	    base_addr[CyCOR4] &= ~(CyDSR|CyCTS|CyDCD);
+			       /* ignore 0->1 modem transitions */
+	if (base_addr[CyCOR5] & (CyDSR|CyCTS|CyDCD))
+	    base_addr[CyCOR5] &= ~(CyDSR|CyCTS|CyDCD);
+    } else {
+	if ((base_addr[CyIER] & CyMdmCh) != CyMdmCh)
+	    base_addr[CyIER] |= CyMdmCh; /* with modem intr */
+			       /* act on 1->0 modem transitions */
+	if ((base_addr[CyCOR4] & (CyDSR|CyCTS|CyDCD)) != (CyDSR|CyCTS|CyDCD))
+	    base_addr[CyCOR4] |= CyDSR|CyCTS|CyDCD;
+			       /* act on 0->1 modem transitions */
+	if ((base_addr[CyCOR5] & (CyDSR|CyCTS|CyDCD)) != (CyDSR|CyCTS|CyDCD))
+	    base_addr[CyCOR5] |= CyDSR|CyCTS|CyDCD;
+    }
+    info->cor3 = (cflag & CSTOPB) ? Cy_2_STOP : Cy_1_STOP;
+    info->cor2 = CyETC;
+    switch(cflag & CSIZE){
+    case CS5:
+        info->cor1 = Cy_5_BITS;
+        break;
+    case CS6:
+        info->cor1 = Cy_6_BITS;
+        break;
+    case CS7:
+        info->cor1 = Cy_7_BITS;
+        break;
+    case CS8:
+        info->cor1 = Cy_8_BITS;
+        break;
+    }
+    if (cflag & PARENB){
+        if (cflag & PARODD){
+            info->cor1 |= CyPARITY_O;
+        }else{
+            info->cor1 |= CyPARITY_E;
+        }
+    }else{
+        info->cor1 |= CyPARITY_NONE;
+    }
+	
+    /* CTS flow control flag */
+#if 0
+    /* Don't complcate matters for now! RGH 141095 */
+    if (cflag & CRTSCTS){
+	info->flags |= ASYNC_CTS_FLOW;
+	info->cor2 |= CyCtsAE;
+    }else{
+	info->flags &= ~ASYNC_CTS_FLOW;
+	info->cor2 &= ~CyCtsAE;
+    }
+#endif
+    if (cflag & CLOCAL)
+	info->flags &= ~ASYNC_CHECK_CD;
+    else
+	info->flags |= ASYNC_CHECK_CD;
+
+     /***********************************************
+	The hardware option, CyRtsAO, presents RTS when
+	the chip has characters to send.  Since most modems
+	use RTS as reverse (inbound) flow control, this
+	option is not used.  If inbound flow control is
+	necessary, DTR can be programmed to provide the
+	appropriate signals for use with a non-standard
+	cable.  Contact Marcio Saito for details.
+     ***********************************************/
+
+    channel = info->line;
+
+    local_irq_save(flags);
+	base_addr[CyCAR] = (u_char)channel;
+
+	/* CyCMR set once only in mvme167_init_serial() */
+	if (base_addr[CyLICR] != channel << 2)
+	    base_addr[CyLICR] = channel << 2;
+	if (base_addr[CyLIVR] != 0x5c)
+	    base_addr[CyLIVR] = 0x5c;
+
+       /* tx and rx baud rate */
+
+	if (base_addr[CyCOR1] != info->cor1)
+	    need_init_chan = 1;
+	if (base_addr[CyTCOR] != info->tco)
+	    base_addr[CyTCOR] = info->tco;
+	if (base_addr[CyTBPR] != info->tbpr)
+	    base_addr[CyTBPR] = info->tbpr;
+	if (base_addr[CyRCOR] != info->rco)
+	    base_addr[CyRCOR] = info->rco;
+	if (base_addr[CyRBPR] != info->rbpr)
+	    base_addr[CyRBPR] = info->rbpr;
+
+	/* set line characteristics  according configuration */
+
+	if (base_addr[CySCHR1] != START_CHAR(info->tty))
+	    base_addr[CySCHR1] = START_CHAR(info->tty);
+	if (base_addr[CySCHR2] != STOP_CHAR(info->tty))
+	    base_addr[CySCHR2] = STOP_CHAR(info->tty);
+	if (base_addr[CySCRL] != START_CHAR(info->tty))
+	    base_addr[CySCRL] = START_CHAR(info->tty);
+	if (base_addr[CySCRH] != START_CHAR(info->tty))
+	    base_addr[CySCRH] = START_CHAR(info->tty);
+	if (base_addr[CyCOR1] != info->cor1)
+	    base_addr[CyCOR1] = info->cor1;
+	if (base_addr[CyCOR2] != info->cor2)
+	    base_addr[CyCOR2] = info->cor2;
+	if (base_addr[CyCOR3] != info->cor3)
+	    base_addr[CyCOR3] = info->cor3;
+	if (base_addr[CyCOR4] != info->cor4)
+	    base_addr[CyCOR4] = info->cor4;
+	if (base_addr[CyCOR5] != info->cor5)
+	    base_addr[CyCOR5] = info->cor5;
+	if (base_addr[CyCOR6] != info->cor6)
+	    base_addr[CyCOR6] = info->cor6;
+	if (base_addr[CyCOR7] != info->cor7)
+	    base_addr[CyCOR7] = info->cor7;
+
+	if (need_init_chan)
+	    write_cy_cmd(base_addr,CyINIT_CHAN);
+
+	base_addr[CyCAR] = (u_char)channel; /* !!! Is this needed? */
+
+	/* 2ms default rx timeout */
+	ti = info->default_timeout ? info->default_timeout : 0x02;
+	if (base_addr[CyRTPRL] != ti)
+	    base_addr[CyRTPRL] = ti;
+	if (base_addr[CyRTPRH] != 0)
+	    base_addr[CyRTPRH] = 0;
+
+	/* Set up RTS here also ????? RGH 141095 */
+	if(i == 0){ /* baud rate is zero, turn off line */
+	    if ((base_addr[CyMSVR2] & CyDTR) == CyDTR)
+	        base_addr[CyMSVR2] = 0;
+#ifdef SERIAL_DEBUG_DTR
+            printk("cyc: %d: dropping DTR\n", __LINE__);
+            printk("     status: 0x%x, 0x%x\n", base_addr[CyMSVR1], base_addr[CyMSVR2]);
+#endif
+	}else{
+	    if ((base_addr[CyMSVR2] & CyDTR) != CyDTR)
+	        base_addr[CyMSVR2] = CyDTR;
+#ifdef SERIAL_DEBUG_DTR
+            printk("cyc: %d: raising DTR\n", __LINE__);
+            printk("     status: 0x%x, 0x%x\n", base_addr[CyMSVR1], base_addr[CyMSVR2]);
+#endif
+	}
+
+	if (info->tty){
+	    clear_bit(TTY_IO_ERROR, &info->tty->flags);
+	}
+
+    local_irq_restore(flags);
+
+} /* config_setup */
+
+
+static void
+cy_put_char(struct tty_struct *tty, unsigned char ch)
+{
+  struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
+  unsigned long flags;
+
+#ifdef SERIAL_DEBUG_IO
+    printk("cy_put_char %s(0x%02x)\n", tty->name, ch);
+#endif
+
+    if (serial_paranoia_check(info, tty->name, "cy_put_char"))
+	return;
+
+    if (!tty || !info->xmit_buf)
+	return;
+
+    local_irq_save(flags);
+	if (info->xmit_cnt >= PAGE_SIZE - 1) {
+	    local_irq_restore(flags);
+	    return;
+	}
+
+	info->xmit_buf[info->xmit_head++] = ch;
+	info->xmit_head &= PAGE_SIZE - 1;
+	info->xmit_cnt++;
+    local_irq_restore(flags);
+} /* cy_put_char */
+
+
+static void
+cy_flush_chars(struct tty_struct *tty)
+{
+  struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
+  unsigned long flags;
+  volatile unsigned char *base_addr = (u_char *)BASE_ADDR;
+  int channel;
+				
+#ifdef SERIAL_DEBUG_IO
+    printk("cy_flush_chars %s\n", tty->name); /* */
+#endif
+
+    if (serial_paranoia_check(info, tty->name, "cy_flush_chars"))
+	return;
+
+    if (info->xmit_cnt <= 0 || tty->stopped
+    || tty->hw_stopped || !info->xmit_buf)
+	return;
+
+    channel = info->line;
+
+    local_irq_save(flags);
+	base_addr[CyCAR] = channel;
+	base_addr[CyIER] |= CyTxMpty;
+    local_irq_restore(flags);
+} /* cy_flush_chars */
+
+
+/* This routine gets called when tty_write has put something into
+    the write_queue.  If the port is not already transmitting stuff,
+    start it off by enabling interrupts.  The interrupt service
+    routine will then ensure that the characters are sent.  If the
+    port is already active, there is no need to kick it.
+ */
+static int
+cy_write(struct tty_struct * tty,
+           const unsigned char *buf, int count)
+{
+  struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
+  unsigned long flags;
+  int c, total = 0;
+
+#ifdef SERIAL_DEBUG_IO
+    printk("cy_write %s\n", tty->name); /* */
+#endif
+
+    if (serial_paranoia_check(info, tty->name, "cy_write")){
+	return 0;
+    }
+	
+    if (!tty || !info->xmit_buf || !tmp_buf){
+        return 0;
+    }
+
+    while (1) {
+	    local_irq_save(flags);
+	    c = min_t(int, count, min(SERIAL_XMIT_SIZE - info->xmit_cnt - 1,
+				      SERIAL_XMIT_SIZE - info->xmit_head));
+	    if (c <= 0) {
+		    local_irq_restore(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;
+	    local_irq_restore(flags);
+
+	    buf += c;
+	    count -= c;
+	    total += c;
+    }
+
+    if (info->xmit_cnt
+    && !tty->stopped
+    && !tty->hw_stopped ) {
+        start_xmit(info);
+    }
+    return total;
+} /* cy_write */
+
+
+static int
+cy_write_room(struct tty_struct *tty)
+{
+  struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
+  int	ret;
+				
+#ifdef SERIAL_DEBUG_IO
+    printk("cy_write_room %s\n", tty->name); /* */
+#endif
+
+    if (serial_paranoia_check(info, tty->name, "cy_write_room"))
+	return 0;
+    ret = PAGE_SIZE - info->xmit_cnt - 1;
+    if (ret < 0)
+	ret = 0;
+    return ret;
+} /* cy_write_room */
+
+
+static int
+cy_chars_in_buffer(struct tty_struct *tty)
+{
+  struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
+				
+#ifdef SERIAL_DEBUG_IO
+    printk("cy_chars_in_buffer %s %d\n", tty->name, info->xmit_cnt); /* */
+#endif
+
+    if (serial_paranoia_check(info, tty->name, "cy_chars_in_buffer"))
+	return 0;
+
+    return info->xmit_cnt;
+} /* cy_chars_in_buffer */
+
+
+static void
+cy_flush_buffer(struct tty_struct *tty)
+{
+  struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
+  unsigned long flags;
+				
+#ifdef SERIAL_DEBUG_IO
+    printk("cy_flush_buffer %s\n", tty->name); /* */
+#endif
+
+    if (serial_paranoia_check(info, tty->name, "cy_flush_buffer"))
+	return;
+    local_irq_save(flags);
+	info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
+    local_irq_restore(flags);
+    tty_wakeup(tty);
+} /* cy_flush_buffer */
+
+
+/* This routine is called by the upper-layer tty layer to signal
+   that incoming characters should be throttled or that the
+   throttle should be released.
+ */
+static void
+cy_throttle(struct tty_struct * tty)
+{
+  struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
+  unsigned long flags;
+  volatile unsigned char *base_addr = (u_char *)BASE_ADDR;
+  int channel;
+
+#ifdef SERIAL_DEBUG_THROTTLE
+  char buf[64];
+	
+    printk("throttle %s: %d....\n", tty_name(tty, buf),
+	   tty->ldisc.chars_in_buffer(tty));
+    printk("cy_throttle %s\n", tty->name);
+#endif
+
+    if (serial_paranoia_check(info, tty->name, "cy_nthrottle")){
+	    return;
+    }
+
+    if (I_IXOFF(tty)) {
+	info->x_char = STOP_CHAR(tty);
+	    /* Should use the "Send Special Character" feature!!! */
+    }
+
+    channel = info->line;
+
+    local_irq_save(flags);
+	base_addr[CyCAR] = (u_char)channel;
+	base_addr[CyMSVR1] = 0;
+    local_irq_restore(flags);
+
+    return;
+} /* cy_throttle */
+
+
+static void
+cy_unthrottle(struct tty_struct * tty)
+{
+  struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
+  unsigned long flags;
+  volatile unsigned char *base_addr = (u_char *)BASE_ADDR;
+  int channel;
+
+#ifdef SERIAL_DEBUG_THROTTLE
+  char buf[64];
+	
+    printk("throttle %s: %d....\n", tty_name(tty, buf),
+	   tty->ldisc.chars_in_buffer(tty));
+    printk("cy_unthrottle %s\n", tty->name);
+#endif
+
+    if (serial_paranoia_check(info, tty->name, "cy_nthrottle")){
+	    return;
+    }
+
+    if (I_IXOFF(tty)) {
+	info->x_char = START_CHAR(tty);
+	/* Should use the "Send Special Character" feature!!! */
+    }
+
+    channel = info->line;
+
+    local_irq_save(flags);
+	base_addr[CyCAR] = (u_char)channel;
+	base_addr[CyMSVR1] = CyRTS;
+    local_irq_restore(flags);
+
+    return;
+} /* cy_unthrottle */
+
+static int
+get_serial_info(struct cyclades_port * info,
+                           struct serial_struct * retinfo)
+{
+  struct serial_struct tmp;
+
+/* CP('g'); */
+    if (!retinfo)
+            return -EFAULT;
+    memset(&tmp, 0, sizeof(tmp));
+    tmp.type = info->type;
+    tmp.line = info->line;
+    tmp.port = info->line;
+    tmp.irq = 0;
+    tmp.flags = info->flags;
+    tmp.baud_base = 0;          /*!!!*/
+    tmp.close_delay = info->close_delay;
+    tmp.custom_divisor = 0;     /*!!!*/
+    tmp.hub6 = 0;               /*!!!*/
+    return copy_to_user(retinfo,&tmp,sizeof(*retinfo)) ? -EFAULT : 0;
+} /* get_serial_info */
+
+static int
+set_serial_info(struct cyclades_port * info,
+                           struct serial_struct * new_info)
+{
+  struct serial_struct new_serial;
+  struct cyclades_port old_info;
+
+/* CP('s'); */
+    if (!new_info)
+	    return -EFAULT;
+    if (copy_from_user(&new_serial,new_info,sizeof(new_serial)))
+	    return -EFAULT;
+    old_info = *info;
+
+    if (!capable(CAP_SYS_ADMIN)) {
+	    if ((new_serial.close_delay != info->close_delay) ||
+		((new_serial.flags & ASYNC_FLAGS & ~ASYNC_USR_MASK) !=
+		 (info->flags & ASYNC_FLAGS & ~ASYNC_USR_MASK)))
+		    return -EPERM;
+	    info->flags = ((info->flags & ~ASYNC_USR_MASK) |
+			   (new_serial.flags & ASYNC_USR_MASK));
+	    goto check_and_exit;
+    }
+
+
+    /*
+     * OK, past this point, all the error checking has been done.
+     * At this point, we start making changes.....
+     */
+
+    info->flags = ((info->flags & ~ASYNC_FLAGS) |
+		    (new_serial.flags & ASYNC_FLAGS));
+    info->close_delay = new_serial.close_delay;
+
+
+check_and_exit:
+    if (info->flags & ASYNC_INITIALIZED){
+	config_setup(info);
+	return 0;
+    }else{
+        return startup(info);
+    }
+} /* set_serial_info */
+
+static int
+cy_tiocmget(struct tty_struct *tty, struct file *file)
+{
+  struct cyclades_port * info = (struct cyclades_port *)tty->driver_data;
+  int channel;
+  volatile unsigned char *base_addr = (u_char *)BASE_ADDR;
+  unsigned long flags;
+  unsigned char status;
+  unsigned int result;
+
+    channel = info->line;
+
+    local_irq_save(flags);
+        base_addr[CyCAR] = (u_char)channel;
+        status = base_addr[CyMSVR1] | base_addr[CyMSVR2];
+    local_irq_restore(flags);
+
+    return    ((status  & CyRTS) ? TIOCM_RTS : 0)
+            | ((status  & CyDTR) ? TIOCM_DTR : 0)
+            | ((status  & CyDCD) ? TIOCM_CAR : 0)
+            | ((status  & CyDSR) ? TIOCM_DSR : 0)
+            | ((status  & CyCTS) ? TIOCM_CTS : 0);
+} /* cy_tiocmget */
+
+static int
+cy_tiocmset(struct tty_struct *tty, struct file *file,
+	    unsigned int set, unsigned int clear)
+{
+  struct cyclades_port * info = (struct cyclades_port *)tty->driver_data;
+  int channel;
+  volatile unsigned char *base_addr = (u_char *)BASE_ADDR;
+  unsigned long flags;
+  unsigned int arg;
+	  
+    channel = info->line;
+
+	if (set & TIOCM_RTS){
+	    local_irq_save(flags);
+		base_addr[CyCAR] = (u_char)channel;
+		base_addr[CyMSVR1] = CyRTS;
+	    local_irq_restore(flags);
+	}
+	if (set & TIOCM_DTR){
+	    local_irq_save(flags);
+	    base_addr[CyCAR] = (u_char)channel;
+/* CP('S');CP('2'); */
+	    base_addr[CyMSVR2] = CyDTR;
+#ifdef SERIAL_DEBUG_DTR
+            printk("cyc: %d: raising DTR\n", __LINE__);
+            printk("     status: 0x%x, 0x%x\n", base_addr[CyMSVR1], base_addr[CyMSVR2]);
+#endif
+	    local_irq_restore(flags);
+	}
+
+	if (clear & TIOCM_RTS){
+	    local_irq_save(flags);
+		base_addr[CyCAR] = (u_char)channel;
+		base_addr[CyMSVR1] = 0;
+	    local_irq_restore(flags);
+	}
+	if (clear & TIOCM_DTR){
+	    local_irq_save(flags);
+	    base_addr[CyCAR] = (u_char)channel;
+/* CP('C');CP('2'); */
+	    base_addr[CyMSVR2] = 0;
+#ifdef SERIAL_DEBUG_DTR
+            printk("cyc: %d: dropping DTR\n", __LINE__);
+            printk("     status: 0x%x, 0x%x\n", base_addr[CyMSVR1], base_addr[CyMSVR2]);
+#endif
+	    local_irq_restore(flags);
+	}
+
+    return 0;
+} /* set_modem_info */
+
+static void
+send_break( struct cyclades_port * info, int duration)
+{ /* Let the transmit ISR take care of this (since it
+     requires stuffing characters into the output stream).
+   */
+    info->x_break = duration;
+    if (!info->xmit_cnt ) {
+	start_xmit(info);
+    }
+} /* send_break */
+
+static int
+get_mon_info(struct cyclades_port * info, struct cyclades_monitor * mon)
+{
+
+   if (copy_to_user(mon, &info->mon, sizeof(struct cyclades_monitor)))
+	   return -EFAULT;
+   info->mon.int_count  = 0;
+   info->mon.char_count = 0;
+   info->mon.char_max   = 0;
+   info->mon.char_last  = 0;
+   return 0;
+}
+
+static int
+set_threshold(struct cyclades_port * info, unsigned long *arg)
+{
+   volatile unsigned char *base_addr = (u_char *)BASE_ADDR;
+   unsigned long value;
+   int channel;
+   
+   if (get_user(value, arg))
+	   return -EFAULT;
+
+   channel = info->line;
+   info->cor4 &= ~CyREC_FIFO;
+   info->cor4 |= value & CyREC_FIFO;
+   base_addr[CyCOR4] = info->cor4;
+   return 0;
+}
+
+static int
+get_threshold(struct cyclades_port * info, unsigned long *value)
+{
+   volatile unsigned char *base_addr = (u_char *)BASE_ADDR;
+   int channel;
+   unsigned long tmp;
+   
+   channel = info->line;
+
+   tmp = base_addr[CyCOR4] & CyREC_FIFO;
+   return put_user(tmp,value);
+}
+
+static int
+set_default_threshold(struct cyclades_port * info, unsigned long *arg)
+{
+   unsigned long value;
+
+   if (get_user(value, arg))
+	return -EFAULT;
+
+   info->default_threshold = value & 0x0f;
+   return 0;
+}
+
+static int
+get_default_threshold(struct cyclades_port * info, unsigned long *value)
+{
+   return put_user(info->default_threshold,value);
+}
+
+static int
+set_timeout(struct cyclades_port * info, unsigned long *arg)
+{
+   volatile unsigned char *base_addr = (u_char *)BASE_ADDR;
+   int channel;
+   unsigned long value;
+
+   if (get_user(value, arg))
+	   return -EFAULT;
+   
+   channel = info->line;
+
+   base_addr[CyRTPRL] = value & 0xff;
+   base_addr[CyRTPRH] = (value >> 8) & 0xff;
+   return 0;
+}
+
+static int
+get_timeout(struct cyclades_port * info, unsigned long *value)
+{
+   volatile unsigned char *base_addr = (u_char *)BASE_ADDR;
+   int channel;
+   unsigned long tmp;
+   
+   channel = info->line;
+
+   tmp = base_addr[CyRTPRL];
+   return put_user(tmp,value);
+}
+
+static int
+set_default_timeout(struct cyclades_port * info, unsigned long value)
+{
+   info->default_timeout = value & 0xff;
+   return 0;
+}
+
+static int
+get_default_timeout(struct cyclades_port * info, unsigned long *value)
+{
+   return put_user(info->default_timeout,value);
+}
+
+static int
+cy_ioctl(struct tty_struct *tty, struct file * file,
+            unsigned int cmd, unsigned long arg)
+{
+  unsigned long val;
+  struct cyclades_port * info = (struct cyclades_port *)tty->driver_data;
+  int ret_val = 0;
+
+#ifdef SERIAL_DEBUG_OTHER
+    printk("cy_ioctl %s, cmd = %x arg = %lx\n", tty->name, cmd, arg); /* */
+#endif
+
+    switch (cmd) {
+        case CYGETMON:
+            ret_val = get_mon_info(info, (struct cyclades_monitor *)arg);
+	    break;
+        case CYGETTHRESH:
+	    ret_val = get_threshold(info, (unsigned long *)arg);
+ 	    break;
+        case CYSETTHRESH:
+            ret_val = set_threshold(info, (unsigned long *)arg);
+	    break;
+        case CYGETDEFTHRESH:
+	    ret_val = get_default_threshold(info, (unsigned long *)arg);
+ 	    break;
+        case CYSETDEFTHRESH:
+            ret_val = set_default_threshold(info, (unsigned long *)arg);
+	    break;
+        case CYGETTIMEOUT:
+	    ret_val = get_timeout(info, (unsigned long *)arg);
+ 	    break;
+        case CYSETTIMEOUT:
+            ret_val = set_timeout(info, (unsigned long *)arg);
+	    break;
+        case CYGETDEFTIMEOUT:
+	    ret_val = get_default_timeout(info, (unsigned long *)arg);
+ 	    break;
+        case CYSETDEFTIMEOUT:
+            ret_val = set_default_timeout(info, (unsigned long)arg);
+	    break;
+        case TCSBRK:    /* SVID version: non-zero arg --> no break */
+	    ret_val = tty_check_change(tty);
+	    if (ret_val)
+		    break;
+            tty_wait_until_sent(tty,0);
+            if (!arg)
+                send_break(info, HZ/4); /* 1/4 second */
+            break;
+        case TCSBRKP:   /* support for POSIX tcsendbreak() */
+	    ret_val = tty_check_change(tty);
+	    if (ret_val)
+		break;
+            tty_wait_until_sent(tty,0);
+            send_break(info, arg ? arg*(HZ/10) : HZ/4);
+            break;
+
+/* The following commands are incompletely implemented!!! */
+        case TIOCGSOFTCAR:
+            ret_val = put_user(C_CLOCAL(tty) ? 1 : 0, (unsigned long *) arg);
+            break;
+        case TIOCSSOFTCAR:
+            ret_val = get_user(val, (unsigned long *) arg);
+	    if (ret_val)
+		    break;
+            tty->termios->c_cflag =
+                    ((tty->termios->c_cflag & ~CLOCAL) | (val ? CLOCAL : 0));
+            break;
+        case TIOCGSERIAL:
+            ret_val = get_serial_info(info, (struct serial_struct *) arg);
+            break;
+        case TIOCSSERIAL:
+            ret_val = set_serial_info(info,
+                                   (struct serial_struct *) arg);
+            break;
+        default:
+	    ret_val = -ENOIOCTLCMD;
+    }
+
+#ifdef SERIAL_DEBUG_OTHER
+    printk("cy_ioctl done\n");
+#endif
+
+    return ret_val;
+} /* cy_ioctl */
+
+
+
+
+static void
+cy_set_termios(struct tty_struct *tty, struct termios * old_termios)
+{
+  struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
+
+#ifdef SERIAL_DEBUG_OTHER
+    printk("cy_set_termios %s\n", tty->name);
+#endif
+
+    if (tty->termios->c_cflag == old_termios->c_cflag)
+        return;
+    config_setup(info);
+
+    if ((old_termios->c_cflag & CRTSCTS) &&
+        !(tty->termios->c_cflag & CRTSCTS)) {
+            tty->stopped = 0;
+            cy_start(tty);
+    }
+#ifdef tytso_patch_94Nov25_1726
+    if (!(old_termios->c_cflag & CLOCAL) &&
+        (tty->termios->c_cflag & CLOCAL))
+            wake_up_interruptible(&info->open_wait);
+#endif
+
+    return;
+} /* cy_set_termios */
+
+
+static void
+cy_close(struct tty_struct * tty, struct file * filp)
+{
+  struct cyclades_port * info = (struct cyclades_port *)tty->driver_data;
+
+/* CP('C'); */
+#ifdef SERIAL_DEBUG_OTHER
+    printk("cy_close %s\n", tty->name);
+#endif
+
+    if (!info
+    || serial_paranoia_check(info, tty->name, "cy_close")){
+        return;
+    }
+#ifdef SERIAL_DEBUG_OPEN
+    printk("cy_close %s, count = %d\n", tty->name, info->count);
+#endif
+
+    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("cy_close: bad serial port count; tty->count is 1, "
+	   "info->count is %d\n", info->count);
+	info->count = 1;
+    }
+#ifdef SERIAL_DEBUG_COUNT
+    printk("cyc: %d: decrementing count to %d\n", __LINE__, info->count - 1);
+#endif
+    if (--info->count < 0) {
+	printk("cy_close: bad serial port count for ttys%d: %d\n",
+	       info->line, info->count);
+#ifdef SERIAL_DEBUG_COUNT
+    printk("cyc: %d: setting count to 0\n", __LINE__);
+#endif
+	info->count = 0;
+    }
+    if (info->count)
+	return;
+    info->flags |= ASYNC_CLOSING;
+    if (info->flags & ASYNC_INITIALIZED)
+	tty_wait_until_sent(tty, 3000); /* 30 seconds timeout */
+    shutdown(info);
+    if (tty->driver->flush_buffer)
+	tty->driver->flush_buffer(tty);
+    tty_ldisc_flush(tty);
+    info->event = 0;
+    info->tty = 0;
+    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);
+
+#ifdef SERIAL_DEBUG_OTHER
+    printk("cy_close done\n");
+#endif
+
+    return;
+} /* cy_close */
+
+/*
+ * cy_hangup() --- called by tty_hangup() when a hangup is signaled.
+ */
+void
+cy_hangup(struct tty_struct *tty)
+{
+  struct cyclades_port * info = (struct cyclades_port *)tty->driver_data;
+	
+#ifdef SERIAL_DEBUG_OTHER
+    printk("cy_hangup %s\n", tty->name); /* */
+#endif
+
+    if (serial_paranoia_check(info, tty->name, "cy_hangup"))
+	return;
+    
+    shutdown(info);
+#if 0
+    info->event = 0;
+    info->count = 0;
+#ifdef SERIAL_DEBUG_COUNT
+    printk("cyc: %d: setting count to 0\n", __LINE__);
+#endif
+    info->tty = 0;
+#endif
+    info->flags &= ~ASYNC_NORMAL_ACTIVE;
+    wake_up_interruptible(&info->open_wait);
+} /* cy_hangup */
+
+
+
+/*
+ * ------------------------------------------------------------
+ * cy_open() and friends
+ * ------------------------------------------------------------
+ */
+
+static int
+block_til_ready(struct tty_struct *tty, struct file * filp,
+                           struct cyclades_port *info)
+{
+  DECLARE_WAITQUEUE(wait, current);
+  unsigned long flags;
+  int channel;
+  int retval;
+  volatile u_char *base_addr = (u_char *)BASE_ADDR;
+
+    /*
+     * If the device is in the middle of being closed, then block
+     * until it's done, and then try again.
+     */
+    if (info->flags & ASYNC_CLOSING) {
+	interruptible_sleep_on(&info->close_wait);
+	if (info->flags & ASYNC_HUP_NOTIFY){
+	    return -EAGAIN;
+	}else{
+	    return -ERESTARTSYS;
+	}
+    }
+
+    /*
+     * If non-blocking mode is set, then make the check up front
+     * and then exit.
+     */
+    if (filp->f_flags & O_NONBLOCK) {
+	info->flags |= ASYNC_NORMAL_ACTIVE;
+	return 0;
+    }
+
+    /*
+     * 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, info->count is dropped by one, so that
+     * cy_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: %s, count = %d\n",
+	   tty->name, info->count);/**/
+#endif
+    info->count--;
+#ifdef SERIAL_DEBUG_COUNT
+    printk("cyc: %d: decrementing count to %d\n", __LINE__, info->count);
+#endif
+    info->blocked_open++;
+
+    channel = info->line;
+
+    while (1) {
+	local_irq_save(flags);
+	base_addr[CyCAR] = (u_char)channel;
+	base_addr[CyMSVR1] = CyRTS;
+/* CP('S');CP('4'); */
+	base_addr[CyMSVR2] = CyDTR;
+#ifdef SERIAL_DEBUG_DTR
+	printk("cyc: %d: raising DTR\n", __LINE__);
+	printk("     status: 0x%x, 0x%x\n", base_addr[CyMSVR1], base_addr[CyMSVR2]);
+#endif
+	local_irq_restore(flags);
+	set_current_state(TASK_INTERRUPTIBLE);
+	if (tty_hung_up_p(filp)
+	|| !(info->flags & ASYNC_INITIALIZED) ){
+	    if (info->flags & ASYNC_HUP_NOTIFY) {
+		retval = -EAGAIN;
+	    }else{
+		retval = -ERESTARTSYS;
+	    }
+	    break;
+	}
+	local_irq_save(flags);
+	    base_addr[CyCAR] = (u_char)channel;
+/* CP('L');CP1(1 && C_CLOCAL(tty)); CP1(1 && (base_addr[CyMSVR1] & CyDCD) ); */
+	    if (!(info->flags & ASYNC_CLOSING)
+	    && (C_CLOCAL(tty)
+	        || (base_addr[CyMSVR1] & CyDCD))) {
+		    local_irq_restore(flags);
+		    break;
+	    }
+	local_irq_restore(flags);
+	if (signal_pending(current)) {
+	    retval = -ERESTARTSYS;
+	    break;
+	}
+#ifdef SERIAL_DEBUG_OPEN
+	printk("block_til_ready blocking: %s, count = %d\n",
+	       tty->name, info->count);/**/
+#endif
+	schedule();
+    }
+    current->state = TASK_RUNNING;
+    remove_wait_queue(&info->open_wait, &wait);
+    if (!tty_hung_up_p(filp)){
+	info->count++;
+#ifdef SERIAL_DEBUG_COUNT
+    printk("cyc: %d: incrementing count to %d\n", __LINE__, info->count);
+#endif
+    }
+    info->blocked_open--;
+#ifdef SERIAL_DEBUG_OPEN
+    printk("block_til_ready after blocking: %s, count = %d\n",
+	   tty->name, info->count);/**/
+#endif
+    if (retval)
+	    return retval;
+    info->flags |= ASYNC_NORMAL_ACTIVE;
+    return 0;
+} /* block_til_ready */
+
+/*
+ * This routine is called whenever a serial port is opened.  It
+ * performs the serial-specific initialization for the tty structure.
+ */
+int
+cy_open(struct tty_struct *tty, struct file * filp)
+{
+  struct cyclades_port  *info;
+  int retval, line;
+
+/* CP('O'); */
+    line = tty->index;
+    if ((line < 0) || (NR_PORTS <= line)){
+        return -ENODEV;
+    }
+    info = &cy_port[line];
+    if (info->line < 0){
+        return -ENODEV;
+    }
+#ifdef SERIAL_DEBUG_OTHER
+    printk("cy_open %s\n", tty->name); /* */
+#endif
+    if (serial_paranoia_check(info, tty->name, "cy_open")){
+        return -ENODEV;
+    }
+#ifdef SERIAL_DEBUG_OPEN
+    printk("cy_open %s, count = %d\n", tty->name, info->count);/**/
+#endif
+    info->count++;
+#ifdef SERIAL_DEBUG_COUNT
+    printk("cyc: %d: incrementing count to %d\n", __LINE__, info->count);
+#endif
+    tty->driver_data = info;
+    info->tty = tty;
+
+    if (!tmp_buf) {
+	tmp_buf = (unsigned char *) get_zeroed_page(GFP_KERNEL);
+	if (!tmp_buf){
+	    return -ENOMEM;
+        }
+    }
+
+    /*
+     * 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("cy_open returning after block_til_ready with %d\n",
+	       retval);
+#endif
+	return retval;
+    }
+
+#ifdef SERIAL_DEBUG_OPEN
+    printk("cy_open done\n");/**/
+#endif
+    return 0;
+} /* cy_open */
+
+
+
+/*
+ * ---------------------------------------------------------------------
+ * serial167_init() and friends
+ *
+ * serial167_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_version(void)
+{
+    printk("MVME166/167 cd2401 driver\n");
+} /* show_version */
+
+/* initialize chips on card -- return number of valid
+   chips (which is number of ports/4) */
+
+/*
+ * This initialises the hardware to a reasonable state.  It should
+ * probe the chip first so as to copy 166-Bug setup as a default for
+ * port 0.  It initialises CMR to CyASYNC; that is never done again, so
+ * as to limit the number of CyINIT_CHAN commands in normal running.
+ *
+ * ... I wonder what I should do if this fails ...
+ */
+
+void
+mvme167_serial_console_setup(int cflag)
+{
+	volatile unsigned char* base_addr = (u_char *)BASE_ADDR;
+	int ch;
+	u_char spd;
+	u_char rcor, rbpr, badspeed = 0;
+	unsigned long flags;
+
+	local_irq_save(flags);
+
+	/*
+	 * First probe channel zero of the chip, to see what speed has
+	 * been selected.
+	 */
+
+	base_addr[CyCAR] = 0;
+
+	rcor = base_addr[CyRCOR] << 5;
+	rbpr = base_addr[CyRBPR];
+
+	for (spd = 0; spd < sizeof(baud_bpr); spd++)
+		if (rbpr == baud_bpr[spd] && rcor == baud_co[spd])
+			break;
+	if (spd >= sizeof(baud_bpr)) {
+		spd = 14;	/* 19200 */
+		badspeed = 1;	/* Failed to identify speed */
+	}
+	initial_console_speed = spd;
+
+	/* OK, we have chosen a speed, now reset and reinitialise */
+
+        my_udelay(20000L);	/* Allow time for any active o/p to complete */
+        if(base_addr[CyCCR] != 0x00){
+            local_irq_restore(flags);
+            /* printk(" chip is never idle (CCR != 0)\n"); */
+            return;
+        }
+
+        base_addr[CyCCR] = CyCHIP_RESET;	/* Reset the chip */
+        my_udelay(1000L);
+
+        if(base_addr[CyGFRCR] == 0x00){
+            local_irq_restore(flags);
+            /* printk(" chip is not responding (GFRCR stayed 0)\n"); */
+            return;
+        }
+
+	/*
+	 * System clock is 20Mhz, divided by 2048, so divide by 10 for a 1.0ms
+	 * tick
+	 */
+
+	base_addr[CyTPR] = 10;
+
+	base_addr[CyPILR1] = 0x01;    /* Interrupt level for modem change */
+	base_addr[CyPILR2] = 0x02;    /* Interrupt level for tx ints */
+	base_addr[CyPILR3] = 0x03;    /* Interrupt level for rx ints */
+
+	/*
+	 * Attempt to set up all channels to something reasonable, and
+	 * bang out a INIT_CHAN command.  We should then be able to limit
+	 * the ammount of fiddling we have to do in normal running.
+	 */
+
+	for (ch = 3; ch >= 0 ; ch--) {
+		base_addr[CyCAR] = (u_char)ch;
+		base_addr[CyIER] = 0;
+		base_addr[CyCMR] = CyASYNC;
+		base_addr[CyLICR] = (u_char)ch << 2;
+		base_addr[CyLIVR] = 0x5c;
+		base_addr[CyTCOR] = baud_co[spd];
+		base_addr[CyTBPR] = baud_bpr[spd];
+		base_addr[CyRCOR] = baud_co[spd] >> 5;
+		base_addr[CyRBPR] = baud_bpr[spd];
+		base_addr[CySCHR1] = 'Q' & 0x1f;
+		base_addr[CySCHR2] = 'X' & 0x1f;
+		base_addr[CySCRL] = 0;
+		base_addr[CySCRH] = 0;
+		base_addr[CyCOR1] = Cy_8_BITS | CyPARITY_NONE;
+		base_addr[CyCOR2] = 0;
+		base_addr[CyCOR3] = Cy_1_STOP;
+		base_addr[CyCOR4] = baud_cor4[spd];
+		base_addr[CyCOR5] = 0;
+		base_addr[CyCOR6] = 0;
+		base_addr[CyCOR7] = 0;
+		base_addr[CyRTPRL] = 2;
+		base_addr[CyRTPRH] = 0;
+	        base_addr[CyMSVR1] = 0;
+	        base_addr[CyMSVR2] = 0;
+		write_cy_cmd(base_addr,CyINIT_CHAN|CyDIS_RCVR|CyDIS_XMTR);
+	}
+
+	/*
+	 * Now do specials for channel zero....
+	 */
+
+        base_addr[CyMSVR1] = CyRTS;
+        base_addr[CyMSVR2] = CyDTR;
+	base_addr[CyIER] = CyRxData;
+	write_cy_cmd(base_addr,CyENB_RCVR|CyENB_XMTR);
+
+	local_irq_restore(flags);
+
+	my_udelay(20000L);	/* Let it all settle down */
+
+        printk("CD2401 initialised,  chip is rev 0x%02x\n", base_addr[CyGFRCR]);
+	if (badspeed)
+        	printk("  WARNING:  Failed to identify line speed, rcor=%02x,rbpr=%02x\n",
+					rcor >> 5, rbpr);
+} /* serial_console_init */
+
+static struct tty_operations cy_ops = {
+	.open = cy_open,
+	.close = cy_close,
+	.write = cy_write,
+	.put_char = cy_put_char,
+	.flush_chars = cy_flush_chars,
+	.write_room = cy_write_room,
+	.chars_in_buffer = cy_chars_in_buffer,
+	.flush_buffer = cy_flush_buffer,
+	.ioctl = cy_ioctl,
+	.throttle = cy_throttle,
+	.unthrottle = cy_unthrottle,
+	.set_termios = cy_set_termios,
+	.stop = cy_stop,
+	.start = cy_start,
+	.hangup = cy_hangup,
+	.tiocmget = cy_tiocmget,
+	.tiocmset = cy_tiocmset,
+};
+/* The serial driver boot-time initialization code!
+    Hardware I/O ports are mapped to character special devices on a
+    first found, first allocated manner.  That is, this code searches
+    for Cyclom cards in the system.  As each is found, it is probed
+    to discover how many chips (and thus how many ports) are present.
+    These ports are mapped to the tty ports 64 and upward in monotonic
+    fashion.  If an 8-port card is replaced with a 16-port card, the
+    port mapping on a following card will shift.
+
+    This approach is different from what is used in the other serial
+    device driver because the Cyclom is more properly a multiplexer,
+    not just an aggregation of serial ports on one card.
+
+    If there are more cards with more ports than have been statically
+    allocated above, a warning is printed and the extra ports are ignored.
+ */
+static int __init
+serial167_init(void)
+{
+  struct cyclades_port *info;
+  int ret = 0;
+  int good_ports = 0;
+  int port_num = 0;
+  int index;
+  int DefSpeed;
+#ifdef notyet
+  struct sigaction sa;
+#endif
+
+    if (!(mvme16x_config &MVME16x_CONFIG_GOT_CD2401))
+	return 0;
+
+    cy_serial_driver = alloc_tty_driver(NR_PORTS);
+    if (!cy_serial_driver)
+	return -ENOMEM;
+
+#if 0
+scrn[1] = '\0';
+#endif
+
+    show_version();
+
+    /* Has "console=0,9600n8" been used in bootinfo to change speed? */
+    if (serial_console_cflag)
+	DefSpeed = serial_console_cflag & 0017;
+    else {
+	DefSpeed = initial_console_speed;
+	serial_console_info = &cy_port[0];
+	serial_console_cflag = DefSpeed | CS8;
+#if 0
+	serial_console = 64; /*callout_driver.minor_start*/
+#endif
+    }
+
+    /* Initialize the tty_driver structure */
+    
+    cy_serial_driver->owner = THIS_MODULE;
+    cy_serial_driver->devfs_name = "tts/";
+    cy_serial_driver->name = "ttyS";
+    cy_serial_driver->major = TTY_MAJOR;
+    cy_serial_driver->minor_start = 64;
+    cy_serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
+    cy_serial_driver->subtype = SERIAL_TYPE_NORMAL;
+    cy_serial_driver->init_termios = tty_std_termios;
+    cy_serial_driver->init_termios.c_cflag =
+	    B9600 | CS8 | CREAD | HUPCL | CLOCAL;
+    cy_serial_driver->flags = TTY_DRIVER_REAL_RAW;
+    tty_set_operations(cy_serial_driver, &cy_ops);
+
+    ret = tty_register_driver(cy_serial_driver);
+    if (ret) {
+	    printk(KERN_ERR "Couldn't register MVME166/7 serial driver\n");
+	    put_tty_driver(cy_serial_driver);
+	    return ret;
+    }
+
+    port_num = 0;
+    info = cy_port;
+    for (index = 0; index < 1; index++) {
+
+	good_ports = 4;
+
+	if(port_num < NR_PORTS){
+	    while( good_ports-- && port_num < NR_PORTS){
+		/*** initialize port ***/
+		info->magic = CYCLADES_MAGIC;
+		info->type = PORT_CIRRUS;
+		info->card = index;
+		info->line = port_num;
+		info->flags = STD_COM_FLAGS;
+		info->tty = 0;
+		info->xmit_fifo_size = 12;
+		info->cor1 = CyPARITY_NONE|Cy_8_BITS;
+		info->cor2 = CyETC;
+		info->cor3 = Cy_1_STOP;
+		info->cor4 = 0x08; /* _very_ small receive threshold */
+		info->cor5 = 0;
+		info->cor6 = 0;
+		info->cor7 = 0;
+		info->tbpr = baud_bpr[DefSpeed]; /* Tx BPR */
+		info->tco = baud_co[DefSpeed]; /* Tx CO */
+		info->rbpr = baud_bpr[DefSpeed]; /* Rx BPR */
+		info->rco = baud_co[DefSpeed] >> 5; /* Rx CO */
+		info->close_delay = 0;
+		info->x_char = 0;
+		info->event = 0;
+		info->count = 0;
+#ifdef SERIAL_DEBUG_COUNT
+    printk("cyc: %d: setting count to 0\n", __LINE__);
+#endif
+		info->blocked_open = 0;
+		info->default_threshold = 0;
+		info->default_timeout = 0;
+		INIT_WORK(&info->tqueue, do_softint, info);
+		init_waitqueue_head(&info->open_wait);
+		init_waitqueue_head(&info->close_wait);
+		/* info->session */
+		/* info->pgrp */
+/*** !!!!!!!! this may expose new bugs !!!!!!!!! *********/
+		info->read_status_mask = CyTIMEOUT| CySPECHAR| CyBREAK
+                                       | CyPARITY| CyFRAME| CyOVERRUN;
+		/* info->timeout */
+
+		printk("ttyS%d ", info->line);
+		port_num++;info++;
+		if(!(port_num & 7)){
+		    printk("\n               ");
+		}
+	    }
+	}
+	printk("\n");
+    }
+    while( port_num < NR_PORTS){
+	info->line = -1;
+	port_num++;info++;
+    }
+#ifdef CONFIG_REMOTE_DEBUG
+    debug_setup();
+#endif
+    ret = request_irq(MVME167_IRQ_SER_ERR, cd2401_rxerr_interrupt, 0,
+				"cd2401_errors", cd2401_rxerr_interrupt);
+    if (ret) {
+	    printk(KERN_ERR "Could't get cd2401_errors IRQ");
+	    goto cleanup_serial_driver;
+    }
+
+    ret = request_irq(MVME167_IRQ_SER_MODEM, cd2401_modem_interrupt, 0,
+				"cd2401_modem", cd2401_modem_interrupt);
+    if (ret) {
+	    printk(KERN_ERR "Could't get cd2401_modem IRQ");
+	    goto cleanup_irq_cd2401_errors;
+    }
+
+    ret = request_irq(MVME167_IRQ_SER_TX, cd2401_tx_interrupt, 0,
+				"cd2401_txints", cd2401_tx_interrupt);
+    if (ret) {
+	    printk(KERN_ERR "Could't get cd2401_txints IRQ");
+	    goto cleanup_irq_cd2401_modem;
+    }
+
+    ret = request_irq(MVME167_IRQ_SER_RX, cd2401_rx_interrupt, 0,
+				"cd2401_rxints", cd2401_rx_interrupt);
+    if (ret) {
+	    printk(KERN_ERR "Could't get cd2401_rxints IRQ");
+	    goto cleanup_irq_cd2401_txints;
+    }
+
+    /* Now we have registered the interrupt handlers, allow the interrupts */
+
+    pcc2chip[PccSCCMICR] = 0x15;		/* Serial ints are level 5 */
+    pcc2chip[PccSCCTICR] = 0x15;
+    pcc2chip[PccSCCRICR] = 0x15;
+
+    pcc2chip[PccIMLR] = 3;			/* Allow PCC2 ints above 3!? */
+
+    return 0;
+cleanup_irq_cd2401_txints:
+    free_irq(MVME167_IRQ_SER_TX, cd2401_tx_interrupt);
+cleanup_irq_cd2401_modem:
+    free_irq(MVME167_IRQ_SER_MODEM, cd2401_modem_interrupt);
+cleanup_irq_cd2401_errors:
+    free_irq(MVME167_IRQ_SER_ERR, cd2401_rxerr_interrupt);
+cleanup_serial_driver:
+    if (tty_unregister_driver(cy_serial_driver))
+	    printk(KERN_ERR "Couldn't unregister MVME166/7 serial driver\n");
+    put_tty_driver(cy_serial_driver);
+    return ret;
+} /* serial167_init */
+
+module_init(serial167_init);
+
+
+#ifdef CYCLOM_SHOW_STATUS
+static void
+show_status(int line_num)
+{
+  volatile unsigned char *base_addr = (u_char *)BASE_ADDR;
+  int channel;
+  struct cyclades_port * info;
+  unsigned long flags;
+
+    info = &cy_port[line_num];
+    channel = info->line;
+    printk("  channel %d\n", channel);/**/
+
+    printk(" cy_port\n");
+    printk("  card line flags = %d %d %x\n",
+                 info->card, info->line, info->flags);
+    printk("  *tty read_status_mask timeout xmit_fifo_size = %lx %x %x %x\n",
+                 (long)info->tty, info->read_status_mask,
+                 info->timeout, info->xmit_fifo_size);
+    printk("  cor1,cor2,cor3,cor4,cor5,cor6,cor7 = %x %x %x %x %x %x %x\n",
+             info->cor1, info->cor2, info->cor3, info->cor4, info->cor5,
+			info->cor6, info->cor7);
+    printk("  tbpr,tco,rbpr,rco = %d %d %d %d\n",
+             info->tbpr, info->tco, info->rbpr, info->rco);
+    printk("  close_delay event count = %d %d %d\n",
+             info->close_delay, info->event, info->count);
+    printk("  x_char blocked_open = %x %x\n",
+             info->x_char, info->blocked_open);
+    printk("  open_wait = %lx %lx %lx\n",
+             (long)info->open_wait);
+
+
+    local_irq_save(flags);
+
+/* Global Registers */
+
+	printk(" CyGFRCR %x\n", base_addr[CyGFRCR]);
+	printk(" CyCAR %x\n", base_addr[CyCAR]);
+	printk(" CyRISR %x\n", base_addr[CyRISR]);
+	printk(" CyTISR %x\n", base_addr[CyTISR]);
+	printk(" CyMISR %x\n", base_addr[CyMISR]);
+	printk(" CyRIR %x\n", base_addr[CyRIR]);
+	printk(" CyTIR %x\n", base_addr[CyTIR]);
+	printk(" CyMIR %x\n", base_addr[CyMIR]);
+	printk(" CyTPR %x\n", base_addr[CyTPR]);
+
+	base_addr[CyCAR] = (u_char)channel;
+
+/* Virtual Registers */
+
+#if 0
+	printk(" CyRIVR %x\n", base_addr[CyRIVR]);
+	printk(" CyTIVR %x\n", base_addr[CyTIVR]);
+	printk(" CyMIVR %x\n", base_addr[CyMIVR]);
+	printk(" CyMISR %x\n", base_addr[CyMISR]);
+#endif
+
+/* Channel Registers */
+
+	printk(" CyCCR %x\n", base_addr[CyCCR]);
+	printk(" CyIER %x\n", base_addr[CyIER]);
+	printk(" CyCOR1 %x\n", base_addr[CyCOR1]);
+	printk(" CyCOR2 %x\n", base_addr[CyCOR2]);
+	printk(" CyCOR3 %x\n", base_addr[CyCOR3]);
+	printk(" CyCOR4 %x\n", base_addr[CyCOR4]);
+	printk(" CyCOR5 %x\n", base_addr[CyCOR5]);
+#if 0
+	printk(" CyCCSR %x\n", base_addr[CyCCSR]);
+	printk(" CyRDCR %x\n", base_addr[CyRDCR]);
+#endif
+	printk(" CySCHR1 %x\n", base_addr[CySCHR1]);
+	printk(" CySCHR2 %x\n", base_addr[CySCHR2]);
+#if 0
+	printk(" CySCHR3 %x\n", base_addr[CySCHR3]);
+	printk(" CySCHR4 %x\n", base_addr[CySCHR4]);
+	printk(" CySCRL %x\n", base_addr[CySCRL]);
+	printk(" CySCRH %x\n", base_addr[CySCRH]);
+	printk(" CyLNC %x\n", base_addr[CyLNC]);
+	printk(" CyMCOR1 %x\n", base_addr[CyMCOR1]);
+	printk(" CyMCOR2 %x\n", base_addr[CyMCOR2]);
+#endif
+	printk(" CyRTPRL %x\n", base_addr[CyRTPRL]);
+	printk(" CyRTPRH %x\n", base_addr[CyRTPRH]);
+	printk(" CyMSVR1 %x\n", base_addr[CyMSVR1]);
+	printk(" CyMSVR2 %x\n", base_addr[CyMSVR2]);
+	printk(" CyRBPR %x\n", base_addr[CyRBPR]);
+	printk(" CyRCOR %x\n", base_addr[CyRCOR]);
+	printk(" CyTBPR %x\n", base_addr[CyTBPR]);
+	printk(" CyTCOR %x\n", base_addr[CyTCOR]);
+
+    local_irq_restore(flags);
+} /* show_status */
+#endif
+
+
+#if 0
+/* Dummy routine in mvme16x/config.c for now */
+
+/* Serial console setup. Called from linux/init/main.c */
+
+void console_setup(char *str, int *ints)
+{
+	char *s;
+	int baud, bits, parity;
+	int cflag = 0;
+
+	/* Sanity check. */
+	if (ints[0] > 3 || ints[1] > 3) return;
+
+	/* Get baud, bits and parity */
+	baud = 2400;
+	bits = 8;
+	parity = 'n';
+	if (ints[2]) baud = ints[2];
+	if ((s = strchr(str, ','))) {
+		do {
+			s++;
+		} while(*s >= '0' && *s <= '9');
+		if (*s) parity = *s++;
+		if (*s) bits   = *s - '0';
+	}
+
+	/* Now construct a cflag setting. */
+	switch(baud) {
+		case 1200:
+			cflag |= B1200;
+			break;
+		case 9600:
+			cflag |= B9600;
+			break;
+		case 19200:
+			cflag |= B19200;
+			break;
+		case 38400:
+			cflag |= B38400;
+			break;
+		case 2400:
+		default:
+			cflag |= B2400;
+			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;
+	}
+
+	serial_console_info = &cy_port[ints[1]];
+	serial_console_cflag = cflag;
+	serial_console = ints[1] + 64; /*callout_driver.minor_start*/
+}
+#endif
+
+/*
+ * The following is probably out of date for 2.1.x serial console stuff.
+ *
+ * The console is registered early on from arch/m68k/kernel/setup.c, and
+ * it therefore relies on the chip being setup correctly by 166-Bug.  This
+ * seems reasonable, as the serial port has been used to invoke the system
+ * boot.  It also means that this function must not rely on any data
+ * initialisation performed by serial167_init() etc.
+ *
+ * Of course, once the console has been registered, we had better ensure
+ * that serial167_init() doesn't leave the chip non-functional.
+ *
+ * The console must be locked when we get here.
+ */
+
+void serial167_console_write(struct console *co, const char *str, unsigned count)
+{
+	volatile unsigned char *base_addr = (u_char *)BASE_ADDR;
+	unsigned long flags;
+	volatile u_char sink;
+	u_char ier;
+	int port;
+	u_char do_lf = 0;
+	int i = 0;
+
+	local_irq_save(flags);
+
+	/* Ensure transmitter is enabled! */
+
+	port = 0;
+	base_addr[CyCAR] = (u_char)port;
+	while (base_addr[CyCCR])
+		;
+	base_addr[CyCCR] = CyENB_XMTR;
+
+	ier = base_addr[CyIER];
+	base_addr[CyIER] = CyTxMpty;
+
+	while (1) {
+		if (pcc2chip[PccSCCTICR] & 0x20)
+		{
+			/* We have a Tx int. Acknowledge it */
+			sink = pcc2chip[PccTPIACKR];
+			if ((base_addr[CyLICR] >> 2) == port) {
+				if (i == count) {
+					/* Last char of string is now output */
+					base_addr[CyTEOIR] = CyNOTRANS;
+					break;
+				}
+				if (do_lf) {
+					base_addr[CyTDR] = '\n';
+					str++;
+					i++;
+					do_lf = 0;
+				}
+				else if (*str == '\n') {
+					base_addr[CyTDR] = '\r';
+					do_lf = 1;
+				}
+				else {
+					base_addr[CyTDR] = *str++;
+					i++;
+				}
+				base_addr[CyTEOIR] = 0;
+			}
+			else
+				base_addr[CyTEOIR] = CyNOTRANS;
+		}
+	}
+
+	base_addr[CyIER] = ier;
+
+	local_irq_restore(flags);
+}
+
+static struct tty_driver *serial167_console_device(struct console *c, int *index)
+{
+	*index = c->index;
+	return cy_serial_driver;
+}
+
+
+static int __init serial167_console_setup(struct console *co, char *options)
+{
+	return 0;
+}
+
+
+static struct console sercons = {
+	.name		= "ttyS",
+	.write		= serial167_console_write,
+	.device		= serial167_console_device,
+	.setup		= serial167_console_setup,
+	.flags		= CON_PRINTBUFFER,
+	.index		= -1,
+};
+
+
+static int __init serial167_console_init(void)
+{
+	if (vme_brdtype == VME_TYPE_MVME166 ||
+			vme_brdtype == VME_TYPE_MVME167 ||
+			vme_brdtype == VME_TYPE_MVME177) {
+		mvme167_serial_console_setup(0);
+		register_console(&sercons);
+	}
+	return 0;
+}
+console_initcall(serial167_console_init);
+
+#ifdef CONFIG_REMOTE_DEBUG
+void putDebugChar (int c)
+{
+	volatile unsigned char *base_addr = (u_char *)BASE_ADDR;
+	unsigned long flags;
+	volatile u_char sink;
+	u_char ier;
+	int port;
+
+	local_irq_save(flags);
+
+	/* Ensure transmitter is enabled! */
+
+	port = DEBUG_PORT;
+	base_addr[CyCAR] = (u_char)port;
+	while (base_addr[CyCCR])
+		;
+	base_addr[CyCCR] = CyENB_XMTR;
+
+	ier = base_addr[CyIER];
+	base_addr[CyIER] = CyTxMpty;
+
+	while (1) {
+		if (pcc2chip[PccSCCTICR] & 0x20)
+		{
+			/* We have a Tx int. Acknowledge it */
+			sink = pcc2chip[PccTPIACKR];
+			if ((base_addr[CyLICR] >> 2) == port) {
+				base_addr[CyTDR] = c;
+				base_addr[CyTEOIR] = 0;
+				break;
+			}
+			else
+				base_addr[CyTEOIR] = CyNOTRANS;
+		}
+	}
+
+	base_addr[CyIER] = ier;
+
+	local_irq_restore(flags);
+}
+
+int getDebugChar()
+{
+	volatile unsigned char *base_addr = (u_char *)BASE_ADDR;
+	unsigned long flags;
+	volatile u_char sink;
+	u_char ier;
+	int port;
+	int i, c;
+
+	i = debugiq.out;
+	if (i != debugiq.in) {
+		c = debugiq.buf[i];
+		if (++i == DEBUG_LEN)
+			i = 0;
+		debugiq.out = i;
+		return c;
+	}
+	/* OK, nothing in queue, wait in poll loop */
+
+	local_irq_save(flags);
+
+	/* Ensure receiver is enabled! */
+
+	port = DEBUG_PORT;
+	base_addr[CyCAR] = (u_char)port;
+#if 0
+	while (base_addr[CyCCR])
+		;
+	base_addr[CyCCR] = CyENB_RCVR;
+#endif
+	ier = base_addr[CyIER];
+	base_addr[CyIER] = CyRxData;
+
+	while (1) {
+		if (pcc2chip[PccSCCRICR] & 0x20)
+		{
+			/* We have a Rx int. Acknowledge it */
+			sink = pcc2chip[PccRPIACKR];
+			if ((base_addr[CyLICR] >> 2) == port) {
+				int cnt = base_addr[CyRFOC];
+				while (cnt-- > 0)
+				{
+					c = base_addr[CyRDR];
+					if (c == 0)
+						printk ("!! debug char is null (cnt=%d) !!", cnt);
+					else
+						queueDebugChar (c);
+				}
+				base_addr[CyREOIR] = 0;
+				i = debugiq.out;
+				if (i == debugiq.in)
+					panic ("Debug input queue empty!");
+				c = debugiq.buf[i];
+				if (++i == DEBUG_LEN)
+					i = 0;
+				debugiq.out = i;
+				break;
+			}
+			else
+				base_addr[CyREOIR] = CyNOTRANS;
+		}
+	}
+
+	base_addr[CyIER] = ier;
+
+	local_irq_restore(flags);
+
+	return (c);
+}
+
+void queueDebugChar (int c)
+{
+	int i;
+
+	i = debugiq.in;
+	debugiq.buf[i] = c;
+	if (++i == DEBUG_LEN)
+		i = 0;
+	if (i != debugiq.out)
+		debugiq.in = i;
+}
+
+static void
+debug_setup()
+{
+  unsigned long flags;
+  volatile unsigned char *base_addr = (u_char *)BASE_ADDR;
+  int   i, cflag;
+
+    cflag = B19200;
+
+    local_irq_save(flags);
+
+    for (i = 0; i < 4; i++)
+    {
+	base_addr[CyCAR] = i;
+	base_addr[CyLICR] = i << 2;
+    }
+
+    debugiq.in = debugiq.out = 0;
+
+    base_addr[CyCAR] = DEBUG_PORT;
+
+    /* baud rate */
+    i = cflag & CBAUD;
+
+    base_addr[CyIER] = 0;
+
+    base_addr[CyCMR] = CyASYNC;
+    base_addr[CyLICR] = DEBUG_PORT << 2;
+    base_addr[CyLIVR] = 0x5c;
+
+    /* tx and rx baud rate */
+
+    base_addr[CyTCOR] = baud_co[i];
+    base_addr[CyTBPR] = baud_bpr[i];
+    base_addr[CyRCOR] = baud_co[i] >> 5;
+    base_addr[CyRBPR] = baud_bpr[i];
+
+    /* set line characteristics  according configuration */
+
+    base_addr[CySCHR1] = 0;
+    base_addr[CySCHR2] = 0;
+    base_addr[CySCRL] = 0;
+    base_addr[CySCRH] = 0;
+    base_addr[CyCOR1] = Cy_8_BITS | CyPARITY_NONE;
+    base_addr[CyCOR2] = 0;
+    base_addr[CyCOR3] = Cy_1_STOP;
+    base_addr[CyCOR4] = baud_cor4[i];
+    base_addr[CyCOR5] = 0;
+    base_addr[CyCOR6] = 0;
+    base_addr[CyCOR7] = 0;
+
+    write_cy_cmd(base_addr,CyINIT_CHAN);
+    write_cy_cmd(base_addr,CyENB_RCVR);
+
+    base_addr[CyCAR] = DEBUG_PORT; /* !!! Is this needed? */
+
+    base_addr[CyRTPRL] = 2;
+    base_addr[CyRTPRH] = 0;
+
+    base_addr[CyMSVR1] = CyRTS;
+    base_addr[CyMSVR2] = CyDTR;
+
+    base_addr[CyIER] = CyRxData;
+
+    local_irq_restore(flags);
+
+} /* debug_setup */
+
+#endif
+
+MODULE_LICENSE("GPL");