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, 2372 insertions, 0 deletions

diff --git a/drivers/sbus/char/aurora.c b/drivers/sbus/char/aurora.c
new file mode 100644
index 000000000000..e5fa1703856b
--- /dev/null
+++ b/drivers/sbus/char/aurora.c
@@ -0,0 +1,2372 @@
+/*	$Id: aurora.c,v 1.19 2002/01/08 16:00:16 davem Exp $
+ *	linux/drivers/sbus/char/aurora.c -- Aurora multiport driver
+ *
+ *	Copyright (c) 1999 by Oliver Aldulea (oli at bv dot ro)
+ *
+ *	This code is based on the RISCom/8 multiport serial driver written
+ *	by Dmitry Gorodchanin (pgmdsg@ibi.com), based on the Linux serial
+ *	driver, written by Linus Torvalds, Theodore T'so and others.
+ *	The Aurora multiport programming info was obtained mainly from the
+ *	Cirrus Logic CD180 documentation (available on the web), and by
+ *	doing heavy tests on the board. Many thanks to Eddie C. Dost for the
+ *	help on the sbus interface.
+ *
+ *	This program is free software; you can redistribute it and/or modify
+ *	it under the terms of the GNU General Public License as published by
+ *	the Free Software Foundation; either version 2 of the License, or
+ *	(at your option) any later version.
+ *
+ *	This program is distributed in the hope that 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ *	Revision 1.0
+ *
+ *	This is the first public release.
+ *
+ *	Most of the information you need is in the aurora.h file. Please
+ *	read that file before reading this one.
+ *
+ *	Several parts of the code do not have comments yet.
+ * 
+ * n.b.  The board can support 115.2 bit rates, but only on a few
+ * ports. The total badwidth of one chip (ports 0-7 or 8-15) is equal
+ * to OSC_FREQ div 16. In case of my board, each chip can take 6
+ * channels of 115.2 kbaud.  This information is not well-tested.
+ * 
+ * Fixed to use tty_get_baud_rate().
+ *   Theodore Ts'o <tytso@mit.edu>, 2001-Oct-12
+ */
+
+#include <linux/module.h>
+
+#include <linux/errno.h>
+#include <linux/sched.h>
+#ifdef AURORA_INT_DEBUG
+#include <linux/timer.h>
+#endif
+#include <linux/interrupt.h>
+#include <linux/tty.h>
+#include <linux/tty_flip.h>
+#include <linux/major.h>
+#include <linux/string.h>
+#include <linux/fcntl.h>
+#include <linux/mm.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/bitops.h>
+
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/oplib.h>
+#include <asm/system.h>
+#include <asm/kdebug.h>
+#include <asm/sbus.h>
+#include <asm/uaccess.h>
+
+#include "aurora.h"
+#include "cd180.h"
+
+unsigned char irqs[4] = {
+	0, 0, 0, 0
+};
+
+#ifdef AURORA_INT_DEBUG
+int irqhit=0;
+#endif
+
+#ifndef MIN
+#define MIN(a,b) ((a) < (b) ? (a) : (b))
+#endif
+
+static struct tty_driver *aurora_driver;
+static struct Aurora_board aurora_board[AURORA_NBOARD] = {
+	{0,},
+};
+
+static struct Aurora_port aurora_port[AURORA_TNPORTS] =  {
+	{ 0, },
+};
+
+/* no longer used. static struct Aurora_board * IRQ_to_board[16] = { NULL, } ;*/
+static unsigned char * tmp_buf = NULL;
+static DECLARE_MUTEX(tmp_buf_sem);
+
+DECLARE_TASK_QUEUE(tq_aurora);
+
+static inline int aurora_paranoia_check(struct Aurora_port const * port,
+				    char *name, const char *routine)
+{
+#ifdef AURORA_PARANOIA_CHECK
+	static const char *badmagic =
+		KERN_DEBUG "aurora: Warning: bad aurora port magic number for device %s in %s\n";
+	static const char *badinfo =
+		KERN_DEBUG "aurora: Warning: null aurora port for device %s in %s\n";
+
+	if (!port) {
+		printk(badinfo, name, routine);
+		return 1;
+	}
+	if (port->magic != AURORA_MAGIC) {
+		printk(badmagic, name, routine);
+		return 1;
+	}
+#endif
+	return 0;
+}
+
+/*
+ * 
+ *  Service functions for aurora driver.
+ * 
+ */
+
+/* Get board number from pointer */
+extern inline int board_No (struct Aurora_board const * bp)
+{
+	return bp - aurora_board;
+}
+
+/* Get port number from pointer */
+extern inline int port_No (struct Aurora_port const * port)
+{
+	return AURORA_PORT(port - aurora_port); 
+}
+
+/* Get pointer to board from pointer to port */
+extern inline struct Aurora_board * port_Board(struct Aurora_port const * port)
+{
+	return &aurora_board[AURORA_BOARD(port - aurora_port)];
+}
+
+/* Wait for Channel Command Register ready */
+extern inline void aurora_wait_CCR(struct aurora_reg128 * r)
+{
+	unsigned long delay;
+
+#ifdef AURORA_DEBUG
+printk("aurora_wait_CCR\n");
+#endif
+	/* FIXME: need something more descriptive than 100000 :) */
+	for (delay = 100000; delay; delay--) 
+		if (!sbus_readb(&r->r[CD180_CCR]))
+			return;
+	printk(KERN_DEBUG "aurora: Timeout waiting for CCR.\n");
+}
+
+/*
+ *  aurora probe functions.
+ */
+
+/* Must be called with enabled interrupts */
+extern inline void aurora_long_delay(unsigned long delay)
+{
+	unsigned long i;
+
+#ifdef AURORA_DEBUG
+	printk("aurora_long_delay: start\n");
+#endif
+	for (i = jiffies + delay; time_before(jiffies, i); ) ;
+#ifdef AURORA_DEBUG
+	printk("aurora_long_delay: end\n");
+#endif
+}
+
+/* Reset and setup CD180 chip */
+static int aurora_init_CD180(struct Aurora_board * bp, int chip)
+{
+	unsigned long flags;
+	int id;
+	
+#ifdef AURORA_DEBUG
+	printk("aurora_init_CD180: start %d:%d\n",
+	       board_No(bp), chip);
+#endif
+	save_flags(flags); cli();
+	sbus_writeb(0, &bp->r[chip]->r[CD180_CAR]);
+	sbus_writeb(0, &bp->r[chip]->r[CD180_GSVR]);
+
+	/* Wait for CCR ready        */
+	aurora_wait_CCR(bp->r[chip]);
+
+	/* Reset CD180 chip          */
+	sbus_writeb(CCR_HARDRESET, &bp->r[chip]->r[CD180_CCR]);
+	udelay(1);
+	sti();
+	id=1000;
+	while((--id) &&
+	      (sbus_readb(&bp->r[chip]->r[CD180_GSVR])!=0xff))udelay(100);
+	if(!id) {
+		printk(KERN_ERR "aurora%d: Chip %d failed init.\n",
+		       board_No(bp), chip);
+		restore_flags(flags);
+		return(-1);
+	}
+	cli();
+	sbus_writeb((board_No(bp)<<5)|((chip+1)<<3),
+		    &bp->r[chip]->r[CD180_GSVR]); /* Set ID for this chip      */
+	sbus_writeb(0x80|bp->ACK_MINT,
+		    &bp->r[chip]->r[CD180_MSMR]); /* Prio for modem intr       */
+	sbus_writeb(0x80|bp->ACK_TINT,
+		    &bp->r[chip]->r[CD180_TSMR]); /* Prio for transmitter intr */
+	sbus_writeb(0x80|bp->ACK_RINT,
+		    &bp->r[chip]->r[CD180_RSMR]); /* Prio for receiver intr    */
+	/* Setting up prescaler. We need 4 tick per 1 ms */
+	sbus_writeb((bp->oscfreq/(1000000/AURORA_TPS)) >> 8,
+		    &bp->r[chip]->r[CD180_PPRH]);
+	sbus_writeb((bp->oscfreq/(1000000/AURORA_TPS)) & 0xff,
+		    &bp->r[chip]->r[CD180_PPRL]);
+
+	sbus_writeb(SRCR_AUTOPRI|SRCR_GLOBPRI,
+		    &bp->r[chip]->r[CD180_SRCR]);
+
+	id = sbus_readb(&bp->r[chip]->r[CD180_GFRCR]);
+	printk(KERN_INFO "aurora%d: Chip %d id %02x: ",
+	       board_No(bp), chip,id);
+	if(sbus_readb(&bp->r[chip]->r[CD180_SRCR]) & 128) {
+		switch (id) {
+			case 0x82:printk("CL-CD1864 rev A\n");break;
+			case 0x83:printk("CL-CD1865 rev A\n");break;
+			case 0x84:printk("CL-CD1865 rev B\n");break;
+			case 0x85:printk("CL-CD1865 rev C\n");break;
+			default:printk("Unknown.\n");
+		};
+	} else {
+		switch (id) {
+			case 0x81:printk("CL-CD180 rev B\n");break;
+			case 0x82:printk("CL-CD180 rev C\n");break;
+			default:printk("Unknown.\n");
+		};
+	}
+	restore_flags(flags);
+#ifdef AURORA_DEBUG
+	printk("aurora_init_CD180: end\n");
+#endif
+	return 0;
+}
+
+static int valid_irq(unsigned char irq)
+{
+int i;
+for(i=0;i<TYPE_1_IRQS;i++)
+	if (type_1_irq[i]==irq) return 1;
+return 0;
+}
+
+static irqreturn_t aurora_interrupt(int irq, void * dev_id, struct pt_regs * regs);
+
+/* Main probing routine, also sets irq. */
+static int aurora_probe(void)
+{
+	struct sbus_bus *sbus;
+	struct sbus_dev *sdev;
+	int grrr;
+	char buf[30];
+	int bn = 0;
+	struct Aurora_board *bp;
+
+	for_each_sbus(sbus) {
+		for_each_sbusdev(sdev, sbus) {
+/*			printk("Try: %x %s\n",sdev,sdev->prom_name);*/
+			if (!strcmp(sdev->prom_name, "sio16")) {
+#ifdef AURORA_DEBUG
+				printk(KERN_INFO "aurora: sio16 at %p\n",sdev);
+#endif
+				if((sdev->reg_addrs[0].reg_size!=1) &&
+				   (sdev->reg_addrs[1].reg_size!=128) &&
+				   (sdev->reg_addrs[2].reg_size!=128) &&
+				   (sdev->reg_addrs[3].reg_size!=4)) {
+				   	printk(KERN_ERR "aurora%d: registers' sizes "
+					       "do not match.\n", bn);
+				   	break;
+				}
+				bp = &aurora_board[bn];
+				bp->r0 = (struct aurora_reg1 *)
+					sbus_ioremap(&sdev->resource[0], 0,
+						     sdev->reg_addrs[0].reg_size,
+						     "sio16");
+				if (bp->r0 == NULL) {
+					printk(KERN_ERR "aurora%d: can't map "
+					       "reg_addrs[0]\n", bn);
+					break;
+				}
+#ifdef AURORA_DEBUG
+				printk("Map reg 0: %p\n", bp->r0);
+#endif
+				bp->r[0] = (struct aurora_reg128 *)
+					sbus_ioremap(&sdev->resource[1], 0,
+						     sdev->reg_addrs[1].reg_size,
+						     "sio16");
+				if (bp->r[0] == NULL) {
+					printk(KERN_ERR "aurora%d: can't map "
+					       "reg_addrs[1]\n", bn);
+					break;
+				}
+#ifdef AURORA_DEBUG
+				printk("Map reg 1: %p\n", bp->r[0]);
+#endif
+				bp->r[1] = (struct aurora_reg128 *)
+					sbus_ioremap(&sdev->resource[2], 0,
+						     sdev->reg_addrs[2].reg_size,
+						     "sio16");
+				if (bp->r[1] == NULL) {
+					printk(KERN_ERR "aurora%d: can't map "
+					       "reg_addrs[2]\n", bn);
+					break;
+				}
+#ifdef AURORA_DEBUG
+				printk("Map reg 2: %p\n", bp->r[1]);
+#endif
+				bp->r3 = (struct aurora_reg4 *)
+					sbus_ioremap(&sdev->resource[3], 0,
+						     sdev->reg_addrs[3].reg_size,
+						     "sio16");
+				if (bp->r3 == NULL) {
+					printk(KERN_ERR "aurora%d: can't map "
+					       "reg_addrs[3]\n", bn);
+					break;
+				}
+#ifdef AURORA_DEBUG
+				printk("Map reg 3: %p\n", bp->r3);
+#endif
+				/* Variables setup */
+				bp->flags = 0;
+#ifdef AURORA_DEBUG
+				grrr=prom_getint(sdev->prom_node,"intr");
+				printk("intr pri %d\n", grrr);
+#endif
+				if ((bp->irq=irqs[bn]) && valid_irq(bp->irq) &&
+				    !request_irq(bp->irq|0x30, aurora_interrupt, SA_SHIRQ, "sio16", bp)) {
+					free_irq(bp->irq|0x30, bp);
+				} else
+				if ((bp->irq=prom_getint(sdev->prom_node, "bintr")) && valid_irq(bp->irq) &&
+				    !request_irq(bp->irq|0x30, aurora_interrupt, SA_SHIRQ, "sio16", bp)) {
+					free_irq(bp->irq|0x30, bp);
+				} else
+				if ((bp->irq=prom_getint(sdev->prom_node, "intr")) && valid_irq(bp->irq) &&
+				    !request_irq(bp->irq|0x30, aurora_interrupt, SA_SHIRQ, "sio16", bp)) {
+					free_irq(bp->irq|0x30, bp);
+				} else
+				for(grrr=0;grrr<TYPE_1_IRQS;grrr++) {
+					if ((bp->irq=type_1_irq[grrr])&&!request_irq(bp->irq|0x30, aurora_interrupt, SA_SHIRQ, "sio16", bp)) {
+						free_irq(bp->irq|0x30, bp);
+						break;
+					} else {
+					printk(KERN_ERR "aurora%d: Could not get an irq for this board !!!\n",bn);
+					bp->flags=0xff;
+					}
+				}
+				if(bp->flags==0xff)break;
+				printk(KERN_INFO "aurora%d: irq %d\n",bn,bp->irq&0x0f);
+				buf[0]=0;
+				grrr=prom_getproperty(sdev->prom_node,"dtr_rts",buf,sizeof(buf));
+				if(!strcmp(buf,"swapped")){
+					printk(KERN_INFO "aurora%d: Swapped DTR and RTS\n",bn);
+					bp->DTR=MSVR_RTS;
+					bp->RTS=MSVR_DTR;
+					bp->MSVDTR=CD180_MSVRTS;
+					bp->MSVRTS=CD180_MSVDTR;
+					bp->flags|=AURORA_BOARD_DTR_FLOW_OK;
+					}else{
+					#ifdef AURORA_FORCE_DTR_FLOW
+					printk(KERN_INFO "aurora%d: Forcing swapped DTR-RTS\n",bn);
+					bp->DTR=MSVR_RTS;
+					bp->RTS=MSVR_DTR;
+					bp->MSVDTR=CD180_MSVRTS;
+					bp->MSVRTS=CD180_MSVDTR;
+					bp->flags|=AURORA_BOARD_DTR_FLOW_OK;
+					#else
+					printk(KERN_INFO "aurora%d: Normal DTR and RTS\n",bn);
+					bp->DTR=MSVR_DTR;
+					bp->RTS=MSVR_RTS;
+					bp->MSVDTR=CD180_MSVDTR;
+					bp->MSVRTS=CD180_MSVRTS;
+					#endif
+				}
+				bp->oscfreq=prom_getint(sdev->prom_node,"clk")*100;
+				printk(KERN_INFO "aurora%d: Oscillator: %d Hz\n",bn,bp->oscfreq);
+				grrr=prom_getproperty(sdev->prom_node,"chip",buf,sizeof(buf));
+				printk(KERN_INFO "aurora%d: Chips: %s\n",bn,buf);
+				grrr=prom_getproperty(sdev->prom_node,"manu",buf,sizeof(buf));
+				printk(KERN_INFO "aurora%d: Manufacturer: %s\n",bn,buf);
+				grrr=prom_getproperty(sdev->prom_node,"model",buf,sizeof(buf));
+				printk(KERN_INFO "aurora%d: Model: %s\n",bn,buf);
+				grrr=prom_getproperty(sdev->prom_node,"rev",buf,sizeof(buf));
+				printk(KERN_INFO "aurora%d: Revision: %s\n",bn,buf);
+				grrr=prom_getproperty(sdev->prom_node,"mode",buf,sizeof(buf));
+				printk(KERN_INFO "aurora%d: Mode: %s\n",bn,buf);
+				#ifdef MODULE
+				bp->count=0;
+				#endif
+				bp->flags = AURORA_BOARD_PRESENT;
+				/* hardware ack */
+				bp->ACK_MINT=1;
+				bp->ACK_TINT=2;
+				bp->ACK_RINT=3;
+				bn++;
+			}
+		}
+	}
+	return bn;
+}
+
+static void aurora_release_io_range(struct Aurora_board *bp)
+{
+	sbus_iounmap((unsigned long)bp->r0, 1);
+	sbus_iounmap((unsigned long)bp->r[0], 128);
+	sbus_iounmap((unsigned long)bp->r[1], 128);
+	sbus_iounmap((unsigned long)bp->r3, 4);
+}
+
+extern inline void aurora_mark_event(struct Aurora_port * port, int event)
+{
+#ifdef AURORA_DEBUG
+	printk("aurora_mark_event: start\n");
+#endif
+	set_bit(event, &port->event);
+	queue_task(&port->tqueue, &tq_aurora);
+	mark_bh(AURORA_BH);
+#ifdef AURORA_DEBUG
+	printk("aurora_mark_event: end\n");
+#endif
+}
+
+static __inline__ struct Aurora_port * aurora_get_port(struct Aurora_board const * bp,
+						       int chip,
+						       unsigned char const *what)
+{
+	unsigned char channel;
+	struct Aurora_port * port;
+
+	channel = ((chip << 3) |
+		   ((sbus_readb(&bp->r[chip]->r[CD180_GSCR]) & GSCR_CHAN) >> GSCR_CHAN_OFF));
+	port = &aurora_port[board_No(bp) * AURORA_NPORT * AURORA_NCD180 + channel];
+	if (port->flags & ASYNC_INITIALIZED)
+		return port;
+
+	printk(KERN_DEBUG "aurora%d: %s interrupt from invalid port %d\n",
+	       board_No(bp), what, channel);
+	return NULL;
+}
+
+static void aurora_receive_exc(struct Aurora_board const * bp, int chip)
+{
+	struct Aurora_port *port;
+	struct tty_struct *tty;
+	unsigned char status;
+	unsigned char ch;
+	
+	if (!(port = aurora_get_port(bp, chip, "Receive_x")))
+		return;
+
+	tty = port->tty;
+	if (tty->flip.count >= TTY_FLIPBUF_SIZE)  {
+#ifdef AURORA_INTNORM
+		printk("aurora%d: port %d: Working around flip buffer overflow.\n",
+		       board_No(bp), port_No(port));
+#endif
+		return;
+	}
+	
+#ifdef AURORA_REPORT_OVERRUN	
+	status = sbus_readb(&bp->r[chip]->r[CD180_RCSR]);
+	if (status & RCSR_OE)  {
+		port->overrun++;
+#if 1
+		printk("aurora%d: port %d: Overrun. Total %ld overruns.\n",
+		       board_No(bp), port_No(port), port->overrun);
+#endif		
+	}
+	status &= port->mark_mask;
+#else	
+	status = sbus_readb(&bp->r[chip]->r[CD180_RCSR]) & port->mark_mask;
+#endif	
+	ch = sbus_readb(&bp->r[chip]->r[CD180_RDR]);
+	if (!status)
+		return;
+
+	if (status & RCSR_TOUT)  {
+/*		printk("aurora%d: port %d: Receiver timeout. Hardware problems ?\n",
+		       board_No(bp), port_No(port));*/
+		return;
+		
+	} else if (status & RCSR_BREAK)  {
+		printk(KERN_DEBUG "aurora%d: port %d: Handling break...\n",
+		       board_No(bp), port_No(port));
+		*tty->flip.flag_buf_ptr++ = TTY_BREAK;
+		if (port->flags & ASYNC_SAK)
+			do_SAK(tty);
+		
+	} else if (status & RCSR_PE) 
+		*tty->flip.flag_buf_ptr++ = TTY_PARITY;
+	
+	else if (status & RCSR_FE) 
+		*tty->flip.flag_buf_ptr++ = TTY_FRAME;
+	
+        else if (status & RCSR_OE)
+		*tty->flip.flag_buf_ptr++ = TTY_OVERRUN;
+	
+	else
+		*tty->flip.flag_buf_ptr++ = 0;
+	
+	*tty->flip.char_buf_ptr++ = ch;
+	tty->flip.count++;
+	queue_task(&tty->flip.tqueue, &tq_timer);
+}
+
+static void aurora_receive(struct Aurora_board const * bp, int chip)
+{
+	struct Aurora_port *port;
+	struct tty_struct *tty;
+	unsigned char count,cnt;
+
+	if (!(port = aurora_get_port(bp, chip, "Receive")))
+		return;
+	
+	tty = port->tty;
+	
+	count = sbus_readb(&bp->r[chip]->r[CD180_RDCR]);
+
+#ifdef AURORA_REPORT_FIFO
+	port->hits[count > 8 ? 9 : count]++;
+#endif
+
+	while (count--)  {
+		if (tty->flip.count >= TTY_FLIPBUF_SIZE)  {
+#ifdef AURORA_INTNORM
+			printk("aurora%d: port %d: Working around flip buffer overflow.\n",
+			       board_No(bp), port_No(port));
+#endif
+			break;
+		}
+		cnt = sbus_readb(&bp->r[chip]->r[CD180_RDR]);
+		*tty->flip.char_buf_ptr++ = cnt;
+		*tty->flip.flag_buf_ptr++ = 0;
+		tty->flip.count++;
+	}
+	queue_task(&tty->flip.tqueue, &tq_timer);
+}
+
+static void aurora_transmit(struct Aurora_board const * bp, int chip)
+{
+	struct Aurora_port *port;
+	struct tty_struct *tty;
+	unsigned char count;
+	
+	if (!(port = aurora_get_port(bp, chip, "Transmit")))
+		return;
+		
+	tty = port->tty;
+	
+	if (port->SRER & SRER_TXEMPTY)  {
+		/* FIFO drained */
+		sbus_writeb(port_No(port) & 7,
+			    &bp->r[chip]->r[CD180_CAR]);
+		udelay(1);
+		port->SRER &= ~SRER_TXEMPTY;
+		sbus_writeb(port->SRER, &bp->r[chip]->r[CD180_SRER]);
+		return;
+	}
+	
+	if ((port->xmit_cnt <= 0 && !port->break_length)
+	    || tty->stopped || tty->hw_stopped)  {
+		sbus_writeb(port_No(port) & 7,
+			    &bp->r[chip]->r[CD180_CAR]);
+		udelay(1);
+		port->SRER &= ~SRER_TXRDY;
+		sbus_writeb(port->SRER,
+			    &bp->r[chip]->r[CD180_SRER]);
+		return;
+	}
+	
+	if (port->break_length)  {
+		if (port->break_length > 0)  {
+			if (port->COR2 & COR2_ETC)  {
+				sbus_writeb(CD180_C_ESC,
+					    &bp->r[chip]->r[CD180_TDR]);
+				sbus_writeb(CD180_C_SBRK,
+					    &bp->r[chip]->r[CD180_TDR]);
+				port->COR2 &= ~COR2_ETC;
+			}
+			count = MIN(port->break_length, 0xff);
+			sbus_writeb(CD180_C_ESC,
+				    &bp->r[chip]->r[CD180_TDR]);
+			sbus_writeb(CD180_C_DELAY,
+				    &bp->r[chip]->r[CD180_TDR]);
+			sbus_writeb(count,
+				    &bp->r[chip]->r[CD180_TDR]);
+			if (!(port->break_length -= count))
+				port->break_length--;
+		} else  {
+			sbus_writeb(CD180_C_ESC,
+				    &bp->r[chip]->r[CD180_TDR]);
+			sbus_writeb(CD180_C_EBRK,
+				    &bp->r[chip]->r[CD180_TDR]);
+			sbus_writeb(port->COR2,
+				    &bp->r[chip]->r[CD180_COR2]);
+			aurora_wait_CCR(bp->r[chip]);
+			sbus_writeb(CCR_CORCHG2,
+				    &bp->r[chip]->r[CD180_CCR]);
+			port->break_length = 0;
+		}
+		return;
+	}
+	
+	count = CD180_NFIFO;
+	do {
+		u8 byte = port->xmit_buf[port->xmit_tail++];
+
+		sbus_writeb(byte, &bp->r[chip]->r[CD180_TDR]);
+		port->xmit_tail = port->xmit_tail & (SERIAL_XMIT_SIZE-1);
+		if (--port->xmit_cnt <= 0)
+			break;
+	} while (--count > 0);
+	
+	if (port->xmit_cnt <= 0)  {
+		sbus_writeb(port_No(port) & 7,
+			    &bp->r[chip]->r[CD180_CAR]);
+		udelay(1);
+		port->SRER &= ~SRER_TXRDY;
+		sbus_writeb(port->SRER,
+			    &bp->r[chip]->r[CD180_SRER]);
+	}
+	if (port->xmit_cnt <= port->wakeup_chars)
+		aurora_mark_event(port, RS_EVENT_WRITE_WAKEUP);
+}
+
+static void aurora_check_modem(struct Aurora_board const * bp, int chip)
+{
+	struct Aurora_port *port;
+	struct tty_struct *tty;
+	unsigned char mcr;
+	
+	if (!(port = aurora_get_port(bp, chip, "Modem")))
+		return;
+		
+	tty = port->tty;
+	
+	mcr = sbus_readb(&bp->r[chip]->r[CD180_MCR]);
+	if (mcr & MCR_CDCHG)  {
+		if (sbus_readb(&bp->r[chip]->r[CD180_MSVR]) & MSVR_CD) 
+			wake_up_interruptible(&port->open_wait);
+		else
+			schedule_task(&port->tqueue_hangup);
+	}
+	
+/* We don't have such things yet. My aurora board has DTR and RTS swapped, but that doesn't count in this driver. Let's hope
+ * Aurora didn't made any boards with CTS or DSR broken...
+ */
+/* #ifdef AURORA_BRAIN_DAMAGED_CTS
+	if (mcr & MCR_CTSCHG)  {
+		if (aurora_in(bp, CD180_MSVR) & MSVR_CTS)  {
+			tty->hw_stopped = 0;
+			port->SRER |= SRER_TXRDY;
+			if (port->xmit_cnt <= port->wakeup_chars)
+				aurora_mark_event(port, RS_EVENT_WRITE_WAKEUP);
+		} else  {
+			tty->hw_stopped = 1;
+			port->SRER &= ~SRER_TXRDY;
+		}
+		sbus_writeb(port->SRER, &bp->r[chip]->r[CD180_SRER]);
+	}
+	if (mcr & MCR_DSRCHG)  {
+		if (aurora_in(bp, CD180_MSVR) & MSVR_DSR)  {
+			tty->hw_stopped = 0;
+			port->SRER |= SRER_TXRDY;
+			if (port->xmit_cnt <= port->wakeup_chars)
+				aurora_mark_event(port, RS_EVENT_WRITE_WAKEUP);
+		} else  {
+			tty->hw_stopped = 1;
+			port->SRER &= ~SRER_TXRDY;
+		}
+		sbus_writeb(port->SRER, &bp->r[chip]->r[CD180_SRER]);
+	}
+#endif AURORA_BRAIN_DAMAGED_CTS */
+	
+	/* Clear change bits */
+	sbus_writeb(0, &bp->r[chip]->r[CD180_MCR]);
+}
+
+/* The main interrupt processing routine */
+static irqreturn_t aurora_interrupt(int irq, void * dev_id, struct pt_regs * regs)
+{
+	unsigned char status;
+	unsigned char ack,chip/*,chip_id*/;
+	struct Aurora_board * bp = (struct Aurora_board *) dev_id;
+	unsigned long loop = 0;
+
+#ifdef AURORA_INT_DEBUG
+	printk("IRQ%d %d\n",irq,++irqhit);
+#ifdef AURORA_FLOODPRO
+	if (irqhit>=AURORA_FLOODPRO)
+		sbus_writeb(8, &bp->r0->r);
+#endif
+#endif
+	
+/* old	bp = IRQ_to_board[irq&0x0f];*/
+	
+	if (!bp || !(bp->flags & AURORA_BOARD_ACTIVE))
+		return IRQ_NONE;
+
+/*	The while() below takes care of this.
+	status = sbus_readb(&bp->r[0]->r[CD180_SRSR]);
+#ifdef AURORA_INT_DEBUG
+	printk("mumu: %02x\n", status);
+#endif
+	if (!(status&SRSR_ANYINT))
+		return IRQ_NONE; * Nobody has anything to say, so exit *
+*/
+	while ((loop++ < 48) &&
+	       (status = sbus_readb(&bp->r[0]->r[CD180_SRSR]) & SRSR_ANYINT)){
+#ifdef AURORA_INT_DEBUG
+		printk("SRSR: %02x\n", status);
+#endif
+		if (status & SRSR_REXT) {
+			ack = sbus_readb(&bp->r3->r[bp->ACK_RINT]);
+#ifdef AURORA_INT_DEBUG
+			printk("R-ACK %02x\n", ack);
+#endif
+			if ((ack >> 5) == board_No(bp)) {
+				if ((chip=((ack>>3)&3)-1) < AURORA_NCD180) {
+					if ((ack&GSVR_ITMASK)==GSVR_IT_RGD) {
+						aurora_receive(bp,chip);
+						sbus_writeb(0,
+							 &bp->r[chip]->r[CD180_EOSRR]);
+					} else if ((ack & GSVR_ITMASK) == GSVR_IT_REXC) {
+						aurora_receive_exc(bp,chip);
+						sbus_writeb(0,
+							 &bp->r[chip]->r[CD180_EOSRR]);
+					}
+				}
+			}
+		} else if (status & SRSR_TEXT) {
+			ack = sbus_readb(&bp->r3->r[bp->ACK_TINT]);
+#ifdef AURORA_INT_DEBUG
+			printk("T-ACK %02x\n", ack);
+#endif
+			if ((ack >> 5) == board_No(bp)) {
+				if ((chip=((ack>>3)&3)-1) < AURORA_NCD180) {
+					if ((ack&GSVR_ITMASK)==GSVR_IT_TX) {
+						aurora_transmit(bp,chip);
+						sbus_writeb(0,
+							 &bp->r[chip]->r[CD180_EOSRR]);
+					}
+				}
+			}
+		} else if (status & SRSR_MEXT) {
+			ack = sbus_readb(&bp->r3->r[bp->ACK_MINT]);
+#ifdef AURORA_INT_DEBUG
+			printk("M-ACK %02x\n", ack);
+#endif
+			if ((ack >> 5) == board_No(bp)) {
+				if ((chip = ((ack>>3)&3)-1) < AURORA_NCD180) {
+					if ((ack&GSVR_ITMASK)==GSVR_IT_MDM) {
+						aurora_check_modem(bp,chip);
+						sbus_writeb(0,
+							 &bp->r[chip]->r[CD180_EOSRR]);
+					}
+				}
+			}
+		}
+	}
+/* I guess this faster code can be used with CD1865, using AUROPRI and GLOBPRI. */
+#if 0
+	while ((loop++ < 48)&&(status=bp->r[0]->r[CD180_SRSR]&SRSR_ANYINT)){
+#ifdef AURORA_INT_DEBUG
+		printk("SRSR: %02x\n",status);
+#endif
+		ack = sbus_readb(&bp->r3->r[0]);
+#ifdef AURORA_INT_DEBUG
+		printk("ACK: %02x\n",ack);
+#endif
+		if ((ack>>5)==board_No(bp)) {
+			if ((chip=((ack>>3)&3)-1) < AURORA_NCD180) {
+				ack&=GSVR_ITMASK;
+				if (ack==GSVR_IT_RGD) {
+					aurora_receive(bp,chip);
+					sbus_writeb(0,
+						    &bp->r[chip]->r[CD180_EOSRR]);
+				} else if (ack==GSVR_IT_REXC) {
+					aurora_receive_exc(bp,chip);
+					sbus_writeb(0,
+						    &bp->r[chip]->r[CD180_EOSRR]);
+				} else if (ack==GSVR_IT_TX) {
+					aurora_transmit(bp,chip);
+					sbus_writeb(0,
+						    &bp->r[chip]->r[CD180_EOSRR]);
+				} else if (ack==GSVR_IT_MDM) {
+					aurora_check_modem(bp,chip);
+					sbus_writeb(0,
+						    &bp->r[chip]->r[CD180_EOSRR]);
+				}
+			}
+		}
+	}
+#endif
+
+/* This is the old handling routine, used in riscom8 for only one CD180. I keep it here for reference. */
+#if 0
+	for(chip=0;chip<AURORA_NCD180;chip++){
+		chip_id=(board_No(bp)<<5)|((chip+1)<<3);
+		loop=0;
+		while ((loop++ < 1) &&
+		       ((status = sbus_readb(&bp->r[chip]->r[CD180_SRSR])) &
+			(SRSR_TEXT | SRSR_MEXT | SRSR_REXT))) {
+
+			if (status & SRSR_REXT) {
+				ack = sbus_readb(&bp->r3->r[bp->ACK_RINT]);
+				if (ack == (chip_id | GSVR_IT_RGD)) {
+#ifdef AURORA_INTMSG
+					printk("RX ACK\n");
+#endif
+					aurora_receive(bp,chip);
+				} else if (ack == (chip_id | GSVR_IT_REXC)) {
+#ifdef AURORA_INTMSG
+					printk("RXC ACK\n");
+#endif
+					aurora_receive_exc(bp,chip);
+				} else {
+#ifdef AURORA_INTNORM
+					printk("aurora%d-%d: Bad receive ack 0x%02x.\n",
+					       board_No(bp), chip, ack);
+#endif
+				}
+			} else if (status & SRSR_TEXT) {
+				ack = sbus_readb(&bp->r3->r[bp->ACK_TINT]);
+				if (ack == (chip_id | GSVR_IT_TX)){
+#ifdef AURORA_INTMSG
+					printk("TX ACK\n");
+#endif
+					aurora_transmit(bp,chip);
+				} else {
+#ifdef AURORA_INTNORM
+					printk("aurora%d-%d: Bad transmit ack 0x%02x.\n",
+					       board_No(bp), chip, ack);
+#endif
+				}
+			} else  if (status & SRSR_MEXT)  {
+				ack = sbus_readb(&bp->r3->r[bp->ACK_MINT]);
+				if (ack == (chip_id | GSVR_IT_MDM)){
+#ifdef AURORA_INTMSG
+					printk("MDM ACK\n");
+#endif
+					aurora_check_modem(bp,chip);
+				} else {
+#ifdef AURORA_INTNORM
+					printk("aurora%d-%d: Bad modem ack 0x%02x.\n",
+					       board_No(bp), chip, ack);
+#endif
+				}
+			}
+			sbus_writeb(0, &bp->r[chip]->r[CD180_EOSRR]);
+		}
+	}
+#endif
+
+	return IRQ_HANDLED;
+}
+
+#ifdef AURORA_INT_DEBUG
+static void aurora_timer (unsigned long ignored);
+
+static struct timer_list aurora_poll_timer =
+			TIMER_INITIALIZER(aurora_timer, 0, 0);
+
+static void
+aurora_timer (unsigned long ignored)
+{
+	unsigned long flags;
+	int i;
+
+	save_flags(flags); cli();
+
+	printk("SRSR: %02x,%02x - ",
+	       sbus_readb(&aurora_board[0].r[0]->r[CD180_SRSR]),
+	       sbus_readb(&aurora_board[0].r[1]->r[CD180_SRSR]));
+	for (i = 0; i < 4; i++) {
+		udelay(1);
+		printk("%02x ",
+		       sbus_readb(&aurora_board[0].r3->r[i]));
+	}
+	printk("\n");
+
+	aurora_poll_timer.expires = jiffies + 300;
+	add_timer (&aurora_poll_timer);
+
+	restore_flags(flags);
+}
+#endif
+
+/*
+ *  Routines for open & close processing.
+ */
+
+/* Called with disabled interrupts */
+static int aurora_setup_board(struct Aurora_board * bp)
+{
+	int error;
+	
+#ifdef AURORA_ALLIRQ
+	int i;
+	for (i = 0; i < AURORA_ALLIRQ; i++) {
+		error = request_irq(allirq[i]|0x30, aurora_interrupt, SA_SHIRQ,
+				    "sio16", bp);
+		if (error)
+			printk(KERN_ERR "IRQ%d request error %d\n",
+			       allirq[i], error);
+	}
+#else
+	error = request_irq(bp->irq|0x30, aurora_interrupt, SA_SHIRQ,
+			    "sio16", bp);
+	if (error) {
+		printk(KERN_ERR "IRQ request error %d\n", error);
+		return error;
+	}
+#endif
+	/* Board reset */
+	sbus_writeb(0, &bp->r0->r);
+	udelay(1);
+	if (bp->flags & AURORA_BOARD_TYPE_2) {
+		/* unknown yet */
+	} else {
+		sbus_writeb((AURORA_CFG_ENABLE_IO | AURORA_CFG_ENABLE_IRQ |
+			     (((bp->irq)&0x0f)>>2)),
+			    &bp->r0->r);
+	}
+	udelay(10000);
+
+	if (aurora_init_CD180(bp,0))error=1;error=0;
+	if (aurora_init_CD180(bp,1))error++;
+	if (error == AURORA_NCD180) {
+		printk(KERN_ERR "Both chips failed initialisation.\n");
+		return -EIO;
+	}
+
+#ifdef AURORA_INT_DEBUG
+	aurora_poll_timer.expires= jiffies + 1;
+	add_timer(&aurora_poll_timer);
+#endif
+#ifdef AURORA_DEBUG
+	printk("aurora_setup_board: end\n");
+#endif
+	return 0;
+}
+
+/* Called with disabled interrupts */
+static void aurora_shutdown_board(struct Aurora_board *bp)
+{
+	int i;
+
+#ifdef AURORA_DEBUG
+	printk("aurora_shutdown_board: start\n");
+#endif
+
+#ifdef AURORA_INT_DEBUG
+	del_timer(&aurora_poll_timer);
+#endif
+
+#ifdef AURORA_ALLIRQ
+	for(i=0;i<AURORA_ALLIRQ;i++){
+		free_irq(allirq[i]|0x30, bp);
+/*		IRQ_to_board[allirq[i]&0xf] = NULL;*/
+	}
+#else
+	free_irq(bp->irq|0x30, bp);
+/*	IRQ_to_board[bp->irq&0xf] = NULL;*/
+#endif	
+	/* Drop all DTR's */
+	for(i=0;i<16;i++){
+		sbus_writeb(i & 7, &bp->r[i>>3]->r[CD180_CAR]);
+		udelay(1);
+		sbus_writeb(0, &bp->r[i>>3]->r[CD180_MSVR]);
+		udelay(1);
+	}
+	/* Board shutdown */
+	sbus_writeb(0, &bp->r0->r);
+
+#ifdef AURORA_DEBUG
+	printk("aurora_shutdown_board: end\n");
+#endif
+}
+
+/* Setting up port characteristics. 
+ * Must be called with disabled interrupts
+ */
+static void aurora_change_speed(struct Aurora_board *bp, struct Aurora_port *port)
+{
+	struct tty_struct *tty;
+	unsigned long baud;
+	long tmp;
+	unsigned char cor1 = 0, cor3 = 0;
+	unsigned char mcor1 = 0, mcor2 = 0,chip;
+	
+#ifdef AURORA_DEBUG
+	printk("aurora_change_speed: start\n");
+#endif
+	if (!(tty = port->tty) || !tty->termios)
+		return;
+		
+	chip = AURORA_CD180(port_No(port));
+
+	port->SRER  = 0;
+	port->COR2 = 0;
+	port->MSVR = MSVR_RTS|MSVR_DTR;
+	
+	baud = tty_get_baud_rate(tty);
+	
+	/* Select port on the board */
+	sbus_writeb(port_No(port) & 7,
+		    &bp->r[chip]->r[CD180_CAR]);
+	udelay(1);
+	
+	if (!baud)  {
+		/* Drop DTR & exit */
+		port->MSVR &= ~(bp->DTR|bp->RTS);
+		sbus_writeb(port->MSVR,
+			    &bp->r[chip]->r[CD180_MSVR]);
+		return;
+	} else  {
+		/* Set DTR on */
+		port->MSVR |= bp->DTR;
+		sbus_writeb(port->MSVR,
+			    &bp->r[chip]->r[CD180_MSVR]);
+	}
+	
+	/* Now we must calculate some speed dependent things. */
+	
+	/* Set baud rate for port. */
+	tmp = (((bp->oscfreq + baud/2) / baud +
+		CD180_TPC/2) / CD180_TPC);
+
+/*	tmp = (bp->oscfreq/7)/baud;
+	if((tmp%10)>4)tmp=tmp/10+1;else tmp=tmp/10;*/
+/*	printk("Prescaler period: %d\n",tmp);*/
+
+	sbus_writeb((tmp >> 8) & 0xff,
+		    &bp->r[chip]->r[CD180_RBPRH]);
+	sbus_writeb((tmp >> 8) & 0xff,
+		    &bp->r[chip]->r[CD180_TBPRH]);
+	sbus_writeb(tmp & 0xff, &bp->r[chip]->r[CD180_RBPRL]);
+	sbus_writeb(tmp & 0xff, &bp->r[chip]->r[CD180_TBPRL]);
+	
+	baud = (baud + 5) / 10;   /* Estimated CPS */
+	
+	/* Two timer ticks seems enough to wakeup something like SLIP driver */
+	tmp = ((baud + HZ/2) / HZ) * 2 - CD180_NFIFO;		
+	port->wakeup_chars = (tmp < 0) ? 0 : ((tmp >= SERIAL_XMIT_SIZE) ?
+					      SERIAL_XMIT_SIZE - 1 : tmp);
+	
+	/* Receiver timeout will be transmission time for 1.5 chars */
+	tmp = (AURORA_TPS + AURORA_TPS/2 + baud/2) / baud;
+	tmp = (tmp > 0xff) ? 0xff : tmp;
+	sbus_writeb(tmp, &bp->r[chip]->r[CD180_RTPR]);
+	
+	switch (C_CSIZE(tty))  {
+	 case CS5:
+		cor1 |= COR1_5BITS;
+		break;
+	 case CS6:
+		cor1 |= COR1_6BITS;
+		break;
+	 case CS7:
+		cor1 |= COR1_7BITS;
+		break;
+	 case CS8:
+		cor1 |= COR1_8BITS;
+		break;
+	}
+	
+	if (C_CSTOPB(tty)) 
+		cor1 |= COR1_2SB;
+	
+	cor1 |= COR1_IGNORE;
+	if (C_PARENB(tty))  {
+		cor1 |= COR1_NORMPAR;
+		if (C_PARODD(tty)) 
+			cor1 |= COR1_ODDP;
+		if (I_INPCK(tty)) 
+			cor1 &= ~COR1_IGNORE;
+	}
+	/* Set marking of some errors */
+	port->mark_mask = RCSR_OE | RCSR_TOUT;
+	if (I_INPCK(tty)) 
+		port->mark_mask |= RCSR_FE | RCSR_PE;
+	if (I_BRKINT(tty) || I_PARMRK(tty)) 
+		port->mark_mask |= RCSR_BREAK;
+	if (I_IGNPAR(tty)) 
+		port->mark_mask &= ~(RCSR_FE | RCSR_PE);
+	if (I_IGNBRK(tty))  {
+		port->mark_mask &= ~RCSR_BREAK;
+		if (I_IGNPAR(tty)) 
+			/* Real raw mode. Ignore all */
+			port->mark_mask &= ~RCSR_OE;
+	}
+	/* Enable Hardware Flow Control */
+	if (C_CRTSCTS(tty))  {
+/*#ifdef AURORA_BRAIN_DAMAGED_CTS
+		port->SRER |= SRER_DSR | SRER_CTS;
+		mcor1 |= MCOR1_DSRZD | MCOR1_CTSZD;
+		mcor2 |= MCOR2_DSROD | MCOR2_CTSOD;
+		tty->hw_stopped = !(aurora_in(bp, CD180_MSVR) & (MSVR_CTS|MSVR_DSR));
+#else*/
+		port->COR2 |= COR2_CTSAE;
+/*#endif*/
+		if (bp->flags&AURORA_BOARD_DTR_FLOW_OK) {
+			mcor1 |= AURORA_RXTH;
+		}
+	}
+	/* Enable Software Flow Control. FIXME: I'm not sure about this */
+	/* Some people reported that it works, but I still doubt */
+	if (I_IXON(tty))  {
+		port->COR2 |= COR2_TXIBE;
+		cor3 |= (COR3_FCT | COR3_SCDE);
+		if (I_IXANY(tty))
+			port->COR2 |= COR2_IXM;
+		sbus_writeb(START_CHAR(tty),
+			    &bp->r[chip]->r[CD180_SCHR1]);
+		sbus_writeb(STOP_CHAR(tty),
+			    &bp->r[chip]->r[CD180_SCHR2]);
+		sbus_writeb(START_CHAR(tty),
+			    &bp->r[chip]->r[CD180_SCHR3]);
+		sbus_writeb(STOP_CHAR(tty),
+			    &bp->r[chip]->r[CD180_SCHR4]);
+	}
+	if (!C_CLOCAL(tty))  {
+		/* Enable CD check */
+		port->SRER |= SRER_CD;
+		mcor1 |= MCOR1_CDZD;
+		mcor2 |= MCOR2_CDOD;
+	}
+	
+	if (C_CREAD(tty)) 
+		/* Enable receiver */
+		port->SRER |= SRER_RXD;
+	
+	/* Set input FIFO size (1-8 bytes) */
+	cor3 |= AURORA_RXFIFO; 
+	/* Setting up CD180 channel registers */
+	sbus_writeb(cor1, &bp->r[chip]->r[CD180_COR1]);
+	sbus_writeb(port->COR2, &bp->r[chip]->r[CD180_COR2]);
+	sbus_writeb(cor3, &bp->r[chip]->r[CD180_COR3]);
+	/* Make CD180 know about registers change */
+	aurora_wait_CCR(bp->r[chip]);
+	sbus_writeb(CCR_CORCHG1 | CCR_CORCHG2 | CCR_CORCHG3,
+		    &bp->r[chip]->r[CD180_CCR]);
+	/* Setting up modem option registers */
+	sbus_writeb(mcor1, &bp->r[chip]->r[CD180_MCOR1]);
+	sbus_writeb(mcor2, &bp->r[chip]->r[CD180_MCOR2]);
+	/* Enable CD180 transmitter & receiver */
+	aurora_wait_CCR(bp->r[chip]);
+	sbus_writeb(CCR_TXEN | CCR_RXEN, &bp->r[chip]->r[CD180_CCR]);
+	/* Enable interrupts */
+	sbus_writeb(port->SRER, &bp->r[chip]->r[CD180_SRER]);
+	/* And finally set RTS on */
+	sbus_writeb(port->MSVR, &bp->r[chip]->r[CD180_MSVR]);
+#ifdef AURORA_DEBUG
+	printk("aurora_change_speed: end\n");
+#endif
+}
+
+/* Must be called with interrupts enabled */
+static int aurora_setup_port(struct Aurora_board *bp, struct Aurora_port *port)
+{
+	unsigned long flags;
+	
+#ifdef AURORA_DEBUG
+	printk("aurora_setup_port: start %d\n",port_No(port));
+#endif
+	if (port->flags & ASYNC_INITIALIZED)
+		return 0;
+		
+	if (!port->xmit_buf) {
+		/* We may sleep in get_zeroed_page() */
+		unsigned long tmp;
+		
+		if (!(tmp = get_zeroed_page(GFP_KERNEL)))
+			return -ENOMEM;
+		    
+		if (port->xmit_buf) {
+			free_page(tmp);
+			return -ERESTARTSYS;
+		}
+		port->xmit_buf = (unsigned char *) tmp;
+	}
+		
+	save_flags(flags); cli();
+		
+	if (port->tty) 
+		clear_bit(TTY_IO_ERROR, &port->tty->flags);
+		
+#ifdef MODULE
+	if ((port->count == 1) && ((++bp->count) == 1))
+			bp->flags |= AURORA_BOARD_ACTIVE;
+#endif
+
+	port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
+	aurora_change_speed(bp, port);
+	port->flags |= ASYNC_INITIALIZED;
+		
+	restore_flags(flags);
+#ifdef AURORA_DEBUG
+	printk("aurora_setup_port: end\n");
+#endif
+	return 0;
+}
+
+/* Must be called with interrupts disabled */
+static void aurora_shutdown_port(struct Aurora_board *bp, struct Aurora_port *port)
+{
+	struct tty_struct *tty;
+	unsigned char chip;
+
+#ifdef AURORA_DEBUG
+	printk("aurora_shutdown_port: start\n");
+#endif
+	if (!(port->flags & ASYNC_INITIALIZED)) 
+		return;
+	
+	chip = AURORA_CD180(port_No(port));
+	
+#ifdef AURORA_REPORT_OVERRUN
+	printk("aurora%d: port %d: Total %ld overruns were detected.\n",
+	       board_No(bp), port_No(port), port->overrun);
+#endif	
+#ifdef AURORA_REPORT_FIFO
+	{
+		int i;
+		
+		printk("aurora%d: port %d: FIFO hits [ ",
+		       board_No(bp), port_No(port));
+		for (i = 0; i < 10; i++)  {
+			printk("%ld ", port->hits[i]);
+		}
+		printk("].\n");
+	}
+#endif	
+	if (port->xmit_buf)  {
+		free_page((unsigned long) port->xmit_buf);
+		port->xmit_buf = NULL;
+	}
+
+	if (!(tty = port->tty) || C_HUPCL(tty))  {
+		/* Drop DTR */
+		port->MSVR &= ~(bp->DTR|bp->RTS);
+		sbus_writeb(port->MSVR,
+			    &bp->r[chip]->r[CD180_MSVR]);
+	}
+	
+        /* Select port */
+	sbus_writeb(port_No(port) & 7,
+		    &bp->r[chip]->r[CD180_CAR]);
+	udelay(1);
+
+	/* Reset port */
+	aurora_wait_CCR(bp->r[chip]);
+	sbus_writeb(CCR_SOFTRESET, &bp->r[chip]->r[CD180_CCR]);
+
+	/* Disable all interrupts from this port */
+	port->SRER = 0;
+	sbus_writeb(port->SRER, &bp->r[chip]->r[CD180_SRER]);
+	
+	if (tty)  
+		set_bit(TTY_IO_ERROR, &tty->flags);
+	port->flags &= ~ASYNC_INITIALIZED;
+
+#ifdef MODULE
+	if (--bp->count < 0)  {
+		printk(KERN_DEBUG "aurora%d: aurora_shutdown_port: "
+		       "bad board count: %d\n",
+		       board_No(bp), bp->count);
+		bp->count = 0;
+	}
+	
+	if (!bp->count)
+		bp->flags &= ~AURORA_BOARD_ACTIVE;
+#endif
+
+#ifdef AURORA_DEBUG
+	printk("aurora_shutdown_port: end\n");
+#endif
+}
+
+	
+static int block_til_ready(struct tty_struct *tty, struct file * filp,
+			   struct Aurora_port *port)
+{
+	DECLARE_WAITQUEUE(wait, current);
+	struct Aurora_board *bp = port_Board(port);
+	int    retval;
+	int    do_clocal = 0;
+	int    CD;
+	unsigned char chip;
+	
+#ifdef AURORA_DEBUG
+	printk("block_til_ready: start\n");
+#endif
+	chip = AURORA_CD180(port_No(port));
+
+	/* If the device is in the middle of being closed, then block
+	 * until it's done, and then try again.
+	 */
+	if (tty_hung_up_p(filp) || port->flags & ASYNC_CLOSING) {
+		interruptible_sleep_on(&port->close_wait);
+		if (port->flags & ASYNC_HUP_NOTIFY)
+			return -EAGAIN;
+		else
+			return -ERESTARTSYS;
+	}
+
+	/* If non-blocking mode is set, or the port is not enabled,
+	 * then make the check up front and then exit.
+	 */
+	if ((filp->f_flags & O_NONBLOCK) ||
+	    (tty->flags & (1 << TTY_IO_ERROR))) {
+		port->flags |= ASYNC_NORMAL_ACTIVE;
+		return 0;
+	}
+
+	if (C_CLOCAL(tty))  
+		do_clocal = 1;
+
+	/* Block waiting for the carrier detect and the line to become
+	 * free (i.e., not in use by the callout).  While we are in
+	 * this loop, info->count is dropped by one, so that
+	 * rs_close() knows when to free things.  We restore it upon
+	 * exit, either normal or abnormal.
+	 */
+	retval = 0;
+	add_wait_queue(&port->open_wait, &wait);
+	cli();
+	if (!tty_hung_up_p(filp))
+		port->count--;
+	sti();
+	port->blocked_open++;
+	while (1) {
+		cli();
+		sbus_writeb(port_No(port) & 7,
+			    &bp->r[chip]->r[CD180_CAR]);
+		udelay(1);
+		CD = sbus_readb(&bp->r[chip]->r[CD180_MSVR]) & MSVR_CD;
+		port->MSVR=bp->RTS;
+
+		/* auto drops DTR */
+		sbus_writeb(port->MSVR, &bp->r[chip]->r[CD180_MSVR]);
+		sti();
+		set_current_state(TASK_INTERRUPTIBLE);
+		if (tty_hung_up_p(filp) ||
+		    !(port->flags & ASYNC_INITIALIZED)) {
+			if (port->flags & ASYNC_HUP_NOTIFY)
+				retval = -EAGAIN;
+			else
+				retval = -ERESTARTSYS;	
+			break;
+		}
+		if (!(port->flags & ASYNC_CLOSING) &&
+		    (do_clocal || CD))
+			break;
+		if (signal_pending(current)) {
+			retval = -ERESTARTSYS;
+			break;
+		}
+		schedule();
+	}
+	current->state = TASK_RUNNING;
+	remove_wait_queue(&port->open_wait, &wait);
+	if (!tty_hung_up_p(filp))
+		port->count++;
+	port->blocked_open--;
+	if (retval)
+		return retval;
+	
+	port->flags |= ASYNC_NORMAL_ACTIVE;
+#ifdef AURORA_DEBUG
+	printk("block_til_ready: end\n");
+#endif
+	return 0;
+}	
+
+static int aurora_open(struct tty_struct * tty, struct file * filp)
+{
+	int board;
+	int error;
+	struct Aurora_port * port;
+	struct Aurora_board * bp;
+	unsigned long flags;
+	
+#ifdef AURORA_DEBUG
+	printk("aurora_open: start\n");
+#endif
+	
+	board = AURORA_BOARD(tty->index);
+	if (board > AURORA_NBOARD ||
+	    !(aurora_board[board].flags & AURORA_BOARD_PRESENT)) {
+#ifdef AURORA_DEBUG
+		printk("aurora_open: error board %d present %d\n",
+		       board, aurora_board[board].flags & AURORA_BOARD_PRESENT);
+#endif
+		return -ENODEV;
+	}
+	
+	bp = &aurora_board[board];
+	port = aurora_port + board * AURORA_NPORT * AURORA_NCD180 + AURORA_PORT(tty->index);
+	if ((aurora_paranoia_check(port, tty->name, "aurora_open")) {
+#ifdef AURORA_DEBUG
+		printk("aurora_open: error paranoia check\n");
+#endif
+		return -ENODEV;
+	}
+	
+	port->count++;
+	tty->driver_data = port;
+	port->tty = tty;
+	
+	if ((error = aurora_setup_port(bp, port))) {
+#ifdef AURORA_DEBUG
+		printk("aurora_open: error aurora_setup_port ret %d\n",error);
+#endif
+		return error;
+	}
+
+	if ((error = block_til_ready(tty, filp, port))) {
+#ifdef AURORA_DEBUG
+		printk("aurora_open: error block_til_ready ret %d\n",error);
+#endif
+		return error;
+	}
+	
+#ifdef AURORA_DEBUG
+	printk("aurora_open: end\n");
+#endif
+	return 0;
+}
+
+static void aurora_close(struct tty_struct * tty, struct file * filp)
+{
+	struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
+	struct Aurora_board *bp;
+	unsigned long flags;
+	unsigned long timeout;
+	unsigned char chip;
+	
+#ifdef AURORA_DEBUG
+	printk("aurora_close: start\n");
+#endif
+	
+	if (!port || (aurora_paranoia_check(port, tty->name, "close"))
+		return;
+	
+	chip = AURORA_CD180(port_No(port));
+
+	save_flags(flags); cli();
+	if (tty_hung_up_p(filp))  {
+		restore_flags(flags);
+		return;
+	}
+	
+	bp = port_Board(port);
+	if ((tty->count == 1) && (port->count != 1))  {
+		printk(KERN_DEBUG "aurora%d: aurora_close: bad port count; "
+		       "tty->count is 1, port count is %d\n",
+		       board_No(bp), port->count);
+		port->count = 1;
+	}
+	if (--port->count < 0)  {
+		printk(KERN_DEBUG "aurora%d: aurora_close: bad port "
+		       "count for tty%d: %d\n",
+		       board_No(bp), port_No(port), port->count);
+		port->count = 0;
+	}
+	if (port->count)  {
+		restore_flags(flags);
+		return;
+	}
+	port->flags |= ASYNC_CLOSING;
+
+	/* Now we wait for the transmit buffer to clear; and we notify 
+	 * the line discipline to only process XON/XOFF characters.
+	 */
+	tty->closing = 1;
+	if (port->closing_wait != ASYNC_CLOSING_WAIT_NONE){
+#ifdef AURORA_DEBUG
+		printk("aurora_close: waiting to flush...\n");
+#endif
+		tty_wait_until_sent(tty, port->closing_wait);
+	}
+
+	/* At this point we stop accepting input.  To do this, we
+	 * disable the receive line status interrupts, and tell the
+	 * interrupt driver to stop checking the data ready bit in the
+	 * line status register.
+	 */
+	port->SRER &= ~SRER_RXD;
+	if (port->flags & ASYNC_INITIALIZED) {
+		port->SRER &= ~SRER_TXRDY;
+		port->SRER |= SRER_TXEMPTY;
+		sbus_writeb(port_No(port) & 7,
+			    &bp->r[chip]->r[CD180_CAR]);
+		udelay(1);
+		sbus_writeb(port->SRER, &bp->r[chip]->r[CD180_SRER]);
+		/*
+		 * Before we drop DTR, make sure the UART transmitter
+		 * has completely drained; this is especially
+		 * important if there is a transmit FIFO!
+		 */
+		timeout = jiffies+HZ;
+		while(port->SRER & SRER_TXEMPTY)  {
+			current->state = TASK_INTERRUPTIBLE;
+			schedule_timeout(port->timeout);
+			if (time_after(jiffies, timeout))
+				break;
+		}
+	}
+#ifdef AURORA_DEBUG
+	printk("aurora_close: shutdown_port\n");
+#endif
+	aurora_shutdown_port(bp, port);
+	if (tty->driver->flush_buffer)
+		tty->driver->flush_buffer(tty);
+	tty_ldisc_flush(tty);
+	tty->closing = 0;
+	port->event = 0;
+	port->tty = 0;
+	if (port->blocked_open) {
+		if (port->close_delay) {
+			current->state = TASK_INTERRUPTIBLE;
+			schedule_timeout(port->close_delay);
+		}
+		wake_up_interruptible(&port->open_wait);
+	}
+	port->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
+	wake_up_interruptible(&port->close_wait);
+	restore_flags(flags);
+#ifdef AURORA_DEBUG
+	printk("aurora_close: end\n");
+#endif
+}
+
+static int aurora_write(struct tty_struct * tty, 
+			const unsigned char *buf, int count)
+{
+	struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
+	struct Aurora_board *bp;
+	int c, total = 0;
+	unsigned long flags;
+	unsigned char chip;
+
+#ifdef AURORA_DEBUG
+	printk("aurora_write: start %d\n",count);
+#endif
+	if ((aurora_paranoia_check(port, tty->name, "aurora_write"))
+		return 0;
+		
+	chip = AURORA_CD180(port_No(port));
+	
+	bp = port_Board(port);
+
+	if (!tty || !port->xmit_buf || !tmp_buf)
+		return 0;
+
+	save_flags(flags);
+	while (1) {
+		cli();
+		c = MIN(count, MIN(SERIAL_XMIT_SIZE - port->xmit_cnt - 1,
+				   SERIAL_XMIT_SIZE - port->xmit_head));
+		if (c <= 0) {
+			restore_flags(flags);
+			break;
+		}
+		memcpy(port->xmit_buf + port->xmit_head, buf, c);
+		port->xmit_head = (port->xmit_head + c) & (SERIAL_XMIT_SIZE-1);
+		port->xmit_cnt += c;
+		restore_flags(flags);
+
+		buf += c;
+		count -= c;
+		total += c;
+	}
+
+	cli();
+	if (port->xmit_cnt && !tty->stopped && !tty->hw_stopped &&
+	    !(port->SRER & SRER_TXRDY)) {
+		port->SRER |= SRER_TXRDY;
+		sbus_writeb(port_No(port) & 7,
+			    &bp->r[chip]->r[CD180_CAR]);
+		udelay(1);
+		sbus_writeb(port->SRER, &bp->r[chip]->r[CD180_SRER]);
+	}
+	restore_flags(flags);
+#ifdef AURORA_DEBUG
+	printk("aurora_write: end %d\n",total);
+#endif
+	return total;
+}
+
+static void aurora_put_char(struct tty_struct * tty, unsigned char ch)
+{
+	struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
+	unsigned long flags;
+
+#ifdef AURORA_DEBUG
+	printk("aurora_put_char: start %c\n",ch);
+#endif
+	if ((aurora_paranoia_check(port, tty->name, "aurora_put_char"))
+		return;
+
+	if (!tty || !port->xmit_buf)
+		return;
+
+	save_flags(flags); cli();
+	
+	if (port->xmit_cnt >= SERIAL_XMIT_SIZE - 1) {
+		restore_flags(flags);
+		return;
+	}
+
+	port->xmit_buf[port->xmit_head++] = ch;
+	port->xmit_head &= SERIAL_XMIT_SIZE - 1;
+	port->xmit_cnt++;
+	restore_flags(flags);
+#ifdef AURORA_DEBUG
+	printk("aurora_put_char: end\n");
+#endif
+}
+
+static void aurora_flush_chars(struct tty_struct * tty)
+{
+	struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
+	unsigned long flags;
+	unsigned char chip;
+
+/*#ifdef AURORA_DEBUG
+	printk("aurora_flush_chars: start\n");
+#endif*/
+	if ((aurora_paranoia_check(port, tty->name, "aurora_flush_chars"))
+		return;
+		
+	chip = AURORA_CD180(port_No(port));
+	
+	if (port->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
+	    !port->xmit_buf)
+		return;
+
+	save_flags(flags); cli();
+	port->SRER |= SRER_TXRDY;
+	sbus_writeb(port_No(port) & 7,
+		    &port_Board(port)->r[chip]->r[CD180_CAR]);
+	udelay(1);
+	sbus_writeb(port->SRER,
+		    &port_Board(port)->r[chip]->r[CD180_SRER]);
+	restore_flags(flags);
+/*#ifdef AURORA_DEBUG
+	printk("aurora_flush_chars: end\n");
+#endif*/
+}
+
+static int aurora_write_room(struct tty_struct * tty)
+{
+	struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
+	int	ret;
+
+#ifdef AURORA_DEBUG
+	printk("aurora_write_room: start\n");
+#endif
+	if ((aurora_paranoia_check(port, tty->name, "aurora_write_room"))
+		return 0;
+
+	ret = SERIAL_XMIT_SIZE - port->xmit_cnt - 1;
+	if (ret < 0)
+		ret = 0;
+#ifdef AURORA_DEBUG
+	printk("aurora_write_room: end\n");
+#endif
+	return ret;
+}
+
+static int aurora_chars_in_buffer(struct tty_struct *tty)
+{
+	struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
+				
+	if ((aurora_paranoia_check(port, tty->name, "aurora_chars_in_buffer"))
+		return 0;
+	
+	return port->xmit_cnt;
+}
+
+static void aurora_flush_buffer(struct tty_struct *tty)
+{
+	struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
+	unsigned long flags;
+
+#ifdef AURORA_DEBUG
+	printk("aurora_flush_buffer: start\n");
+#endif
+	if ((aurora_paranoia_check(port, tty->name, "aurora_flush_buffer"))
+		return;
+
+	save_flags(flags); cli();
+	port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
+	restore_flags(flags);
+	
+	tty_wakeup(tty);
+#ifdef AURORA_DEBUG
+	printk("aurora_flush_buffer: end\n");
+#endif
+}
+
+static int aurora_tiocmget(struct tty_struct *tty, struct file *file)
+{
+	struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
+	struct Aurora_board * bp;
+	unsigned char status,chip;
+	unsigned int result;
+	unsigned long flags;
+
+#ifdef AURORA_DEBUG
+	printk("aurora_get_modem_info: start\n");
+#endif
+	if ((aurora_paranoia_check(port, tty->name, __FUNCTION__))
+		return -ENODEV;
+
+	chip = AURORA_CD180(port_No(port));
+
+	bp = port_Board(port);
+
+	save_flags(flags); cli();
+
+	sbus_writeb(port_No(port) & 7, &bp->r[chip]->r[CD180_CAR]);
+	udelay(1);
+
+	status = sbus_readb(&bp->r[chip]->r[CD180_MSVR]);
+	result = 0/*bp->r[chip]->r[AURORA_RI] & (1u << port_No(port)) ? 0 : TIOCM_RNG*/;
+
+	restore_flags(flags);
+
+	result |= ((status & bp->RTS) ? TIOCM_RTS : 0)
+		| ((status & bp->DTR) ? TIOCM_DTR : 0)
+		| ((status & MSVR_CD)  ? TIOCM_CAR : 0)
+		| ((status & MSVR_DSR) ? TIOCM_DSR : 0)
+		| ((status & MSVR_CTS) ? TIOCM_CTS : 0);
+
+#ifdef AURORA_DEBUG
+	printk("aurora_get_modem_info: end\n");
+#endif
+	return result;
+}
+
+static int aurora_tiocmset(struct tty_struct *tty, struct file *file,
+			   unsigned int set, unsigned int clear)
+{
+	struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
+	unsigned int arg;
+	unsigned long flags;
+	struct Aurora_board *bp = port_Board(port);
+	unsigned char chip;
+
+#ifdef AURORA_DEBUG
+	printk("aurora_set_modem_info: start\n");
+#endif
+	if ((aurora_paranoia_check(port, tty->name, __FUNCTION__))
+		return -ENODEV;
+
+	chip = AURORA_CD180(port_No(port));
+
+	save_flags(flags); cli();
+	if (set & TIOCM_RTS)
+		port->MSVR |= bp->RTS;
+	if (set & TIOCM_DTR)
+		port->MSVR |= bp->DTR;
+	if (clear & TIOCM_RTS)
+		port->MSVR &= ~bp->RTS;
+	if (clear & TIOCM_DTR)
+		port->MSVR &= ~bp->DTR;
+
+	sbus_writeb(port_No(port) & 7, &bp->r[chip]->r[CD180_CAR]);
+	udelay(1);
+
+	sbus_writeb(port->MSVR, &bp->r[chip]->r[CD180_MSVR]);
+
+	restore_flags(flags);
+#ifdef AURORA_DEBUG
+	printk("aurora_set_modem_info: end\n");
+#endif
+	return 0;
+}
+
+static void aurora_send_break(struct Aurora_port * port, unsigned long length)
+{
+	struct Aurora_board *bp = port_Board(port);
+	unsigned long flags;
+	unsigned char chip;
+	
+#ifdef AURORA_DEBUG
+	printk("aurora_send_break: start\n");
+#endif
+	chip = AURORA_CD180(port_No(port));
+	
+	save_flags(flags); cli();
+
+	port->break_length = AURORA_TPS / HZ * length;
+	port->COR2 |= COR2_ETC;
+	port->SRER  |= SRER_TXRDY;
+	sbus_writeb(port_No(port) & 7, &bp->r[chip]->r[CD180_CAR]);
+	udelay(1);
+
+	sbus_writeb(port->COR2, &bp->r[chip]->r[CD180_COR2]);
+	sbus_writeb(port->SRER, &bp->r[chip]->r[CD180_SRER]);
+	aurora_wait_CCR(bp->r[chip]);
+
+	sbus_writeb(CCR_CORCHG2, &bp->r[chip]->r[CD180_CCR]);
+	aurora_wait_CCR(bp->r[chip]);
+
+	restore_flags(flags);
+#ifdef AURORA_DEBUG
+	printk("aurora_send_break: end\n");
+#endif
+}
+
+static int aurora_set_serial_info(struct Aurora_port * port,
+				  struct serial_struct * newinfo)
+{
+	struct serial_struct tmp;
+	struct Aurora_board *bp = port_Board(port);
+	int change_speed;
+	unsigned long flags;
+
+#ifdef AURORA_DEBUG
+	printk("aurora_set_serial_info: start\n");
+#endif
+	if (copy_from_user(&tmp, newinfo, sizeof(tmp)))
+		return -EFAULT;
+#if 0	
+	if ((tmp.irq != bp->irq) ||
+	    (tmp.port != bp->base) ||
+	    (tmp.type != PORT_CIRRUS) ||
+	    (tmp.baud_base != (bp->oscfreq + CD180_TPC/2) / CD180_TPC) ||
+	    (tmp.custom_divisor != 0) ||
+	    (tmp.xmit_fifo_size != CD180_NFIFO) ||
+	    (tmp.flags & ~AURORA_LEGAL_FLAGS))
+		return -EINVAL;
+#endif	
+	
+	change_speed = ((port->flags & ASYNC_SPD_MASK) !=
+			(tmp.flags & ASYNC_SPD_MASK));
+	
+	if (!capable(CAP_SYS_ADMIN)) {
+		if ((tmp.close_delay != port->close_delay) ||
+		    (tmp.closing_wait != port->closing_wait) ||
+		    ((tmp.flags & ~ASYNC_USR_MASK) !=
+		     (port->flags & ~ASYNC_USR_MASK)))  
+			return -EPERM;
+		port->flags = ((port->flags & ~ASYNC_USR_MASK) |
+			       (tmp.flags & ASYNC_USR_MASK));
+	} else  {
+		port->flags = ((port->flags & ~ASYNC_FLAGS) |
+			       (tmp.flags & ASYNC_FLAGS));
+		port->close_delay = tmp.close_delay;
+		port->closing_wait = tmp.closing_wait;
+	}
+	if (change_speed)  {
+		save_flags(flags); cli();
+		aurora_change_speed(bp, port);
+		restore_flags(flags);
+	}
+#ifdef AURORA_DEBUG
+	printk("aurora_set_serial_info: end\n");
+#endif
+	return 0;
+}
+
+extern int aurora_get_serial_info(struct Aurora_port * port,
+				  struct serial_struct * retinfo)
+{
+	struct serial_struct tmp;
+	struct Aurora_board *bp = port_Board(port);
+	
+#ifdef AURORA_DEBUG
+	printk("aurora_get_serial_info: start\n");
+#endif
+	if (!access_ok(VERIFY_WRITE, (void *) retinfo, sizeof(tmp)))
+		return -EFAULT;
+	
+	memset(&tmp, 0, sizeof(tmp));
+	tmp.type = PORT_CIRRUS;
+	tmp.line = port - aurora_port;
+	tmp.port = 0;
+	tmp.irq  = bp->irq;
+	tmp.flags = port->flags;
+	tmp.baud_base = (bp->oscfreq + CD180_TPC/2) / CD180_TPC;
+	tmp.close_delay = port->close_delay * HZ/100;
+	tmp.closing_wait = port->closing_wait * HZ/100;
+	tmp.xmit_fifo_size = CD180_NFIFO;
+	copy_to_user(retinfo, &tmp, sizeof(tmp));
+#ifdef AURORA_DEBUG
+printk("aurora_get_serial_info: end\n");
+#endif
+	return 0;
+}
+
+static int aurora_ioctl(struct tty_struct * tty, struct file * filp, 
+		    unsigned int cmd, unsigned long arg)
+		    
+{
+	struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
+	int retval;
+
+#ifdef AURORA_DEBUG
+	printk("aurora_ioctl: start\n");
+#endif
+	if ((aurora_paranoia_check(port, tty->name, "aurora_ioctl"))
+		return -ENODEV;
+	
+	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)
+			aurora_send_break(port, 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);
+		aurora_send_break(port, arg ? arg*(HZ/10) : HZ/4);
+		return 0;
+	case TIOCGSOFTCAR:
+		return put_user(C_CLOCAL(tty) ? 1 : 0, (unsigned long *)arg);
+	case TIOCSSOFTCAR:
+		if (get_user(arg,(unsigned long *)arg))
+			return -EFAULT;
+		tty->termios->c_cflag =
+			((tty->termios->c_cflag & ~CLOCAL) |
+			 (arg ? CLOCAL : 0));
+		return 0;
+	case TIOCGSERIAL:	
+		return aurora_get_serial_info(port, (struct serial_struct *) arg);
+	case TIOCSSERIAL:	
+		return aurora_set_serial_info(port, (struct serial_struct *) arg);
+	default:
+		return -ENOIOCTLCMD;
+	};
+#ifdef AURORA_DEBUG
+	printk("aurora_ioctl: end\n");
+#endif
+	return 0;
+}
+
+static void aurora_throttle(struct tty_struct * tty)
+{
+	struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
+	struct Aurora_board *bp;
+	unsigned long flags;
+	unsigned char chip;
+
+#ifdef AURORA_DEBUG
+	printk("aurora_throttle: start\n");
+#endif
+	if ((aurora_paranoia_check(port, tty->name, "aurora_throttle"))
+		return;
+	
+	bp = port_Board(port);
+	chip = AURORA_CD180(port_No(port));
+	
+	save_flags(flags); cli();
+	port->MSVR &= ~bp->RTS;
+	sbus_writeb(port_No(port) & 7, &bp->r[chip]->r[CD180_CAR]);
+	udelay(1);
+	if (I_IXOFF(tty))  {
+		aurora_wait_CCR(bp->r[chip]);
+		sbus_writeb(CCR_SSCH2, &bp->r[chip]->r[CD180_CCR]);
+		aurora_wait_CCR(bp->r[chip]);
+	}
+	sbus_writeb(port->MSVR, &bp->r[chip]->r[CD180_MSVR]);
+	restore_flags(flags);
+#ifdef AURORA_DEBUG
+	printk("aurora_throttle: end\n");
+#endif
+}
+
+static void aurora_unthrottle(struct tty_struct * tty)
+{
+	struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
+	struct Aurora_board *bp;
+	unsigned long flags;
+	unsigned char chip;
+
+#ifdef AURORA_DEBUG
+	printk("aurora_unthrottle: start\n");
+#endif
+	if ((aurora_paranoia_check(port, tty->name, "aurora_unthrottle"))
+		return;
+	
+	bp = port_Board(port);
+	
+	chip = AURORA_CD180(port_No(port));
+	
+	save_flags(flags); cli();
+	port->MSVR |= bp->RTS;
+	sbus_writeb(port_No(port) & 7,
+		    &bp->r[chip]->r[CD180_CAR]);
+	udelay(1);
+	if (I_IXOFF(tty))  {
+		aurora_wait_CCR(bp->r[chip]);
+		sbus_writeb(CCR_SSCH1,
+			    &bp->r[chip]->r[CD180_CCR]);
+		aurora_wait_CCR(bp->r[chip]);
+	}
+	sbus_writeb(port->MSVR, &bp->r[chip]->r[CD180_MSVR]);
+	restore_flags(flags);
+#ifdef AURORA_DEBUG
+	printk("aurora_unthrottle: end\n");
+#endif
+}
+
+static void aurora_stop(struct tty_struct * tty)
+{
+	struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
+	struct Aurora_board *bp;
+	unsigned long flags;
+	unsigned char chip;
+
+#ifdef AURORA_DEBUG
+	printk("aurora_stop: start\n");
+#endif
+	if ((aurora_paranoia_check(port, tty->name, "aurora_stop"))
+		return;
+	
+	bp = port_Board(port);
+	
+	chip = AURORA_CD180(port_No(port));
+	
+	save_flags(flags); cli();
+	port->SRER &= ~SRER_TXRDY;
+	sbus_writeb(port_No(port) & 7,
+		    &bp->r[chip]->r[CD180_CAR]);
+	udelay(1);
+	sbus_writeb(port->SRER,
+		    &bp->r[chip]->r[CD180_SRER]);
+	restore_flags(flags);
+#ifdef AURORA_DEBUG
+	printk("aurora_stop: end\n");
+#endif
+}
+
+static void aurora_start(struct tty_struct * tty)
+{
+	struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
+	struct Aurora_board *bp;
+	unsigned long flags;
+	unsigned char chip;
+
+#ifdef AURORA_DEBUG
+	printk("aurora_start: start\n");
+#endif
+	if ((aurora_paranoia_check(port, tty->name, "aurora_start"))
+		return;
+	
+	bp = port_Board(port);
+	
+	chip = AURORA_CD180(port_No(port));
+	
+	save_flags(flags); cli();
+	if (port->xmit_cnt && port->xmit_buf && !(port->SRER & SRER_TXRDY))  {
+		port->SRER |= SRER_TXRDY;
+		sbus_writeb(port_No(port) & 7,
+			    &bp->r[chip]->r[CD180_CAR]);
+		udelay(1);
+		sbus_writeb(port->SRER,
+			    &bp->r[chip]->r[CD180_SRER]);
+	}
+	restore_flags(flags);
+#ifdef AURORA_DEBUG
+	printk("aurora_start: end\n");
+#endif
+}
+
+/*
+ * This routine is called from the scheduler tqueue when the interrupt
+ * routine has signalled that a hangup has occurred.  The path of
+ * hangup processing is:
+ *
+ * 	serial interrupt routine -> (scheduler tqueue) ->
+ * 	do_aurora_hangup() -> tty->hangup() -> aurora_hangup()
+ * 
+ */
+static void do_aurora_hangup(void *private_)
+{
+	struct Aurora_port	*port = (struct Aurora_port *) private_;
+	struct tty_struct	*tty;
+
+#ifdef AURORA_DEBUG
+	printk("do_aurora_hangup: start\n");
+#endif
+	tty = port->tty;
+	if (tty != NULL) {
+		tty_hangup(tty);	/* FIXME: module removal race - AKPM */
+#ifdef AURORA_DEBUG
+		printk("do_aurora_hangup: end\n");
+#endif
+	}
+}
+
+static void aurora_hangup(struct tty_struct * tty)
+{
+	struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
+	struct Aurora_board *bp;
+				
+#ifdef AURORA_DEBUG
+	printk("aurora_hangup: start\n");
+#endif
+	if ((aurora_paranoia_check(port, tty->name, "aurora_hangup"))
+		return;
+	
+	bp = port_Board(port);
+	
+	aurora_shutdown_port(bp, port);
+	port->event = 0;
+	port->count = 0;
+	port->flags &= ~ASYNC_NORMAL_ACTIVE;
+	port->tty = 0;
+	wake_up_interruptible(&port->open_wait);
+#ifdef AURORA_DEBUG
+	printk("aurora_hangup: end\n");
+#endif
+}
+
+static void aurora_set_termios(struct tty_struct * tty, struct termios * old_termios)
+{
+	struct Aurora_port *port = (struct Aurora_port *) tty->driver_data;
+	unsigned long flags;
+
+#ifdef AURORA_DEBUG
+	printk("aurora_set_termios: start\n");
+#endif
+	if ((aurora_paranoia_check(port, tty->name, "aurora_set_termios"))
+		return;
+	
+	if (tty->termios->c_cflag == old_termios->c_cflag &&
+	    tty->termios->c_iflag == old_termios->c_iflag)
+		return;
+
+	save_flags(flags); cli();
+	aurora_change_speed(port_Board(port), port);
+	restore_flags(flags);
+
+	if ((old_termios->c_cflag & CRTSCTS) &&
+	    !(tty->termios->c_cflag & CRTSCTS)) {
+		tty->hw_stopped = 0;
+		aurora_start(tty);
+	}
+#ifdef AURORA_DEBUG
+	printk("aurora_set_termios: end\n");
+#endif
+}
+
+static void do_aurora_bh(void)
+{
+	 run_task_queue(&tq_aurora);
+}
+
+static void do_softint(void *private_)
+{
+	struct Aurora_port	*port = (struct Aurora_port *) private_;
+	struct tty_struct	*tty;
+
+#ifdef AURORA_DEBUG
+	printk("do_softint: start\n");
+#endif
+	tty = port->tty;
+	if (tty == NULL)
+		return;
+
+	if (test_and_clear_bit(RS_EVENT_WRITE_WAKEUP, &port->event)) {
+		tty_wakeup(tty);
+	}
+#ifdef AURORA_DEBUG
+	printk("do_softint: end\n");
+#endif
+}
+
+static struct tty_operations aurora_ops = {
+	.open  = aurora_open,
+	.close = aurora_close,
+	.write = aurora_write,
+	.put_char = aurora_put_char,
+	.flush_chars = aurora_flush_chars,
+	.write_room = aurora_write_room,
+	.chars_in_buffer = aurora_chars_in_buffer,
+	.flush_buffer = aurora_flush_buffer,
+	.ioctl = aurora_ioctl,
+	.throttle = aurora_throttle,
+	.unthrottle = aurora_unthrottle,
+	.set_termios = aurora_set_termios,
+	.stop = aurora_stop,
+	.start = aurora_start,
+	.hangup = aurora_hangup,
+	.tiocmget = aurora_tiocmget,
+	.tiocmset = aurora_tiocmset,
+};
+
+static int aurora_init_drivers(void)
+{
+	int error;
+	int i;
+
+#ifdef AURORA_DEBUG
+	printk("aurora_init_drivers: start\n");
+#endif
+	tmp_buf = (unsigned char *) get_zeroed_page(GFP_KERNEL);
+	if (tmp_buf == NULL) {
+		printk(KERN_ERR "aurora: Couldn't get free page.\n");
+		return 1;
+	}
+	init_bh(AURORA_BH, do_aurora_bh);
+	aurora_driver = alloc_tty_driver(AURORA_INPORTS);
+	if (!aurora_driver) {
+		printk(KERN_ERR "aurora: Couldn't allocate tty driver.\n");
+		free_page((unsigned long) tmp_buf);
+		return 1;
+	}
+	aurora_driver->owner = THIS_MODULE;
+	aurora_driver->name = "ttyA";
+	aurora_driver->major = AURORA_MAJOR;
+	aurora_driver->type = TTY_DRIVER_TYPE_SERIAL;
+	aurora_driver->subtype = SERIAL_TYPE_NORMAL;
+	aurora_driver->init_termios = tty_std_termios;
+	aurora_driver->init_termios.c_cflag =
+		B9600 | CS8 | CREAD | HUPCL | CLOCAL;
+	aurora_driver->flags = TTY_DRIVER_REAL_RAW;
+	tty_set_operations(aurora_driver, &aurora_ops);
+	error = tty_register_driver(aurora_driver);
+	if (error) {
+		put_tty_driver(aurora_driver);
+		free_page((unsigned long) tmp_buf);
+		printk(KERN_ERR "aurora: Couldn't register aurora driver, error = %d\n",
+		       error);
+		return 1;
+	}
+	
+	memset(aurora_port, 0, sizeof(aurora_port));
+	for (i = 0; i < AURORA_TNPORTS; i++)  {
+		aurora_port[i].magic = AURORA_MAGIC;
+		aurora_port[i].tqueue.routine = do_softint;
+		aurora_port[i].tqueue.data = &aurora_port[i];
+		aurora_port[i].tqueue_hangup.routine = do_aurora_hangup;
+		aurora_port[i].tqueue_hangup.data = &aurora_port[i];
+		aurora_port[i].close_delay = 50 * HZ/100;
+		aurora_port[i].closing_wait = 3000 * HZ/100;
+		init_waitqueue_head(&aurora_port[i].open_wait);
+		init_waitqueue_head(&aurora_port[i].close_wait);
+	}
+#ifdef AURORA_DEBUG
+	printk("aurora_init_drivers: end\n");
+#endif
+	return 0;
+}
+
+static void aurora_release_drivers(void)
+{
+#ifdef AURORA_DEBUG
+	printk("aurora_release_drivers: start\n");
+#endif
+	free_page((unsigned long)tmp_buf);
+	tty_unregister_driver(aurora_driver);
+	put_tty_driver(aurora_driver);
+#ifdef AURORA_DEBUG
+	printk("aurora_release_drivers: end\n");
+#endif
+}
+
+/*
+ * Called at boot time.
+ *
+ * You can specify IO base for up to RC_NBOARD cards,
+ * using line "riscom8=0xiobase1,0xiobase2,.." at LILO prompt.
+ * Note that there will be no probing at default
+ * addresses in this case.
+ *
+ */
+void __init aurora_setup(char *str, int *ints)
+{
+	int i;
+
+	for(i=0;(i<ints[0])&&(i<4);i++) {
+		if (ints[i+1]) irqs[i]=ints[i+1];
+		}
+}
+
+static int __init aurora_real_init(void)
+{
+	int found;
+	int i;
+
+	printk(KERN_INFO "aurora: Driver starting.\n");
+	if(aurora_init_drivers())
+		return -EIO;
+	found = aurora_probe();
+	if(!found) {
+		aurora_release_drivers();
+		printk(KERN_INFO "aurora: No Aurora Multiport boards detected.\n");
+		return -EIO;
+	} else {
+		printk(KERN_INFO "aurora: %d boards found.\n", found);
+	}
+	for (i = 0; i < found; i++) {
+		int ret = aurora_setup_board(&aurora_board[i]);
+
+		if (ret) {
+#ifdef AURORA_DEBUG
+			printk(KERN_ERR "aurora_init: error aurora_setup_board ret %d\n",
+			       ret);
+#endif
+			return ret;
+		}
+	}
+	return 0;
+}
+
+int irq  = 0;
+int irq1 = 0;
+int irq2 = 0;
+int irq3 = 0;
+module_param(irq , int, 0);
+module_param(irq1, int, 0);
+module_param(irq2, int, 0);
+module_param(irq3, int, 0);
+
+static int __init aurora_init(void) 
+{
+	if (irq ) irqs[0]=irq ;
+	if (irq1) irqs[1]=irq1;
+	if (irq2) irqs[2]=irq2;
+	if (irq3) irqs[3]=irq3;
+	return aurora_real_init();
+}
+	
+static void __exit aurora_cleanup(void)
+{
+	int i;
+	
+#ifdef AURORA_DEBUG
+printk("cleanup_module: aurora_release_drivers\n");
+#endif
+
+	aurora_release_drivers();
+	for (i = 0; i < AURORA_NBOARD; i++)
+		if (aurora_board[i].flags & AURORA_BOARD_PRESENT) {
+			aurora_shutdown_board(&aurora_board[i]);
+			aurora_release_io_range(&aurora_board[i]);
+		}
+}
+
+module_init(aurora_init);
+module_exit(aurora_cleanup);
+MODULE_LICENSE("GPL");