Subject: [PATCH] ppc32: remove obsolete macserial driver

From: Benjamin Herrenschmidt <[email-masked]>
Date: Mon, 27 Jun 2005 11:43:33 +1000

Hi !

The macserial driver has been obsoleted by the new pmac_zilog driver for
a while now and probably doesn't even work anymore on recent kernels.
This patch removes it.

Signed-off-by: Benjamin Herrenschmidt <[email-masked]>

Index: linux-work/drivers/macintosh/Kconfig
===================================================================
--- linux-work.orig/drivers/macintosh/Kconfig	2005-05-28 17:11:20.000000000 +1000
+++ linux-work/drivers/macintosh/Kconfig	2005-05-28 17:12:21.000000000 +1000
@@ -126,13 +126,6 @@
 	  events; also, the PowerBook button device will be enabled so you can
 	  change the screen brightness.
 
-config MAC_SERIAL
-	tristate "Support for PowerMac serial ports (OBSOLETE DRIVER)"
-	depends on PPC_PMAC && BROKEN
-	help
-	  This driver is obsolete. Use CONFIG_SERIAL_PMACZILOG in
-	  "Character devices --> Serial drivers --> PowerMac z85c30" option.
-
 config ADB_MACIO
 	bool "Include MacIO (CHRP) ADB driver"
 	depends on ADB && PPC_CHRP && !PPC_PMAC64
Index: linux-work/drivers/macintosh/Makefile
===================================================================
--- linux-work.orig/drivers/macintosh/Makefile	2005-05-02 10:48:11.000000000 +1000
+++ linux-work/drivers/macintosh/Makefile	2005-05-28 17:12:03.000000000 +1000
@@ -7,7 +7,6 @@
 obj-$(CONFIG_PPC_PMAC)		+= macio_asic.o
 
 obj-$(CONFIG_PMAC_PBOOK)	+= mediabay.o
-obj-$(CONFIG_MAC_SERIAL)	+= macserial.o
 obj-$(CONFIG_MAC_EMUMOUSEBTN)	+= mac_hid.o
 obj-$(CONFIG_INPUT_ADBHID)	+= adbhid.o
 obj-$(CONFIG_ANSLCD)		+= ans-lcd.o
Index: linux-work/drivers/macintosh/macserial.c
===================================================================
--- linux-work.orig/drivers/macintosh/macserial.c	2005-05-02 10:48:11.000000000 +1000
+++ /dev/null	1970-01-01 00:00:00.000000000 +0000
@@ -1,3036 +0,0 @@
-/*
- * macserial.c: Serial port driver for Power Macintoshes.
- *
- * Derived from drivers/sbus/char/sunserial.c by Paul Mackerras.
- *
- * Copyright (C) 1996 Paul Mackerras ([email-masked])
- * Copyright (C) 1995 David S. Miller ([email-masked])
- *
- * Receive DMA code by Takashi Oe <[email-masked]>.
- *
- * $Id: macserial.c,v 1.24.2.4 1999/10/19 04:36:42 paulus Exp $
- */
-
-#include <linux/config.h>
-#include <linux/errno.h>
-#include <linux/module.h>
-#include <linux/signal.h>
-#include <linux/sched.h>
-#include <linux/timer.h>
-#include <linux/interrupt.h>
-#include <linux/workqueue.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/delay.h>
-#include <linux/init.h>
-#ifdef CONFIG_SERIAL_CONSOLE
-#include <linux/console.h>
-#endif
-#include <linux/slab.h>
-#include <linux/bitops.h>
-
-#include <asm/sections.h>
-#include <asm/io.h>
-#include <asm/pgtable.h>
-#include <asm/irq.h>
-#include <asm/prom.h>
-#include <asm/system.h>
-#include <asm/segment.h>
-#include <asm/machdep.h>
-#include <asm/pmac_feature.h>
-#include <linux/adb.h>
-#include <linux/pmu.h>
-#ifdef CONFIG_KGDB
-#include <asm/kgdb.h>
-#endif
-#include <asm/dbdma.h>
-
-#include "macserial.h"
-
-#ifdef CONFIG_PMAC_PBOOK
-static int serial_notify_sleep(struct pmu_sleep_notifier *self, int when);
-static struct pmu_sleep_notifier serial_sleep_notifier = {
-	serial_notify_sleep,
-	SLEEP_LEVEL_MISC,
-};
-#endif
-
-#define SUPPORT_SERIAL_DMA
-#define MACSERIAL_VERSION	"2.0"
-
-/*
- * It would be nice to dynamically allocate everything that
- * depends on NUM_SERIAL, so we could support any number of
- * Z8530s, but for now...
- */
-#define NUM_SERIAL	2		/* Max number of ZS chips supported */
-#define NUM_CHANNELS	(NUM_SERIAL * 2)	/* 2 channels per chip */
-
-/* On PowerMacs, the hardware takes care of the SCC recovery time,
-   but we need the eieio to make sure that the accesses occur
-   in the order we want. */
-#define RECOVERY_DELAY	eieio()
-
-static struct tty_driver *serial_driver;
-
-struct mac_zschannel zs_channels[NUM_CHANNELS];
-
-struct mac_serial zs_soft[NUM_CHANNELS];
-int zs_channels_found;
-struct mac_serial *zs_chain;	/* list of all channels */
-
-struct tty_struct zs_ttys[NUM_CHANNELS];
-
-static int is_powerbook;
-
-#ifdef CONFIG_SERIAL_CONSOLE
-static struct console sercons;
-#endif
-
-#ifdef CONFIG_KGDB
-struct mac_zschannel *zs_kgdbchan;
-static unsigned char scc_inittab[] = {
-	9,  0x80,	/* reset A side (CHRA) */
-	13, 0,		/* set baud rate divisor */
-	12, 1,
-	14, 1,		/* baud rate gen enable, src=rtxc (BRENABL) */
-	11, 0x50,	/* clocks = br gen (RCBR | TCBR) */
-	5,  0x6a,	/* tx 8 bits, assert RTS (Tx8 | TxENAB | RTS) */
-	4,  0x44,	/* x16 clock, 1 stop (SB1 | X16CLK)*/
-	3,  0xc1,	/* rx enable, 8 bits (RxENABLE | Rx8)*/
-};
-#endif
-#define ZS_CLOCK         3686400 	/* Z8530 RTxC input clock rate */
-
-/* serial subtype definitions */
-#define SERIAL_TYPE_NORMAL	1
-
-/* number of characters left in xmit buffer before we ask for more */
-#define WAKEUP_CHARS 256
-
-/*
- * Debugging.
- */
-#undef SERIAL_DEBUG_INTR
-#undef SERIAL_DEBUG_OPEN
-#undef SERIAL_DEBUG_FLOW
-#undef SERIAL_DEBUG_POWER
-#undef SERIAL_DEBUG_THROTTLE
-#undef SERIAL_DEBUG_STOP
-#undef SERIAL_DEBUG_BAUDS
-
-#define RS_STROBE_TIME 10
-#define RS_ISR_PASS_LIMIT 256
-
-#define _INLINE_ inline
-
-#ifdef SERIAL_DEBUG_OPEN
-#define OPNDBG(fmt, arg...)	printk(KERN_DEBUG fmt , ## arg)
-#else
-#define OPNDBG(fmt, arg...)	do { } while (0)
-#endif
-#ifdef SERIAL_DEBUG_POWER
-#define PWRDBG(fmt, arg...)	printk(KERN_DEBUG fmt , ## arg)
-#else
-#define PWRDBG(fmt, arg...)	do { } while (0)
-#endif
-#ifdef SERIAL_DEBUG_BAUDS
-#define BAUDBG(fmt, arg...)	printk(fmt , ## arg)
-#else
-#define BAUDBG(fmt, arg...)	do { } while (0)
-#endif
-
-static void probe_sccs(void);
-static void change_speed(struct mac_serial *info, struct termios *old);
-static void rs_wait_until_sent(struct tty_struct *tty, int timeout);
-static int set_scc_power(struct mac_serial * info, int state);
-static int setup_scc(struct mac_serial * info);
-static void dbdma_reset(volatile struct dbdma_regs *dma);
-static void dbdma_flush(volatile struct dbdma_regs *dma);
-static irqreturn_t rs_txdma_irq(int irq, void *dev_id, struct pt_regs *regs);
-static irqreturn_t rs_rxdma_irq(int irq, void *dev_id, struct pt_regs *regs);
-static void dma_init(struct mac_serial * info);
-static void rxdma_start(struct mac_serial * info, int curr);
-static void rxdma_to_tty(struct mac_serial * info);
-
-/*
- * tmp_buf is used as a temporary buffer by serial_write.  We need to
- * lock it in case the copy_from_user blocks while swapping in a page,
- * and some other program tries to do a serial write at the same time.
- * Since the lock will only come under contention when the system is
- * swapping and available memory is low, it makes sense to share one
- * buffer across all the serial ports, since it significantly saves
- * memory if large numbers of serial ports are open.
- */
-static unsigned char *tmp_buf;
-static DECLARE_MUTEX(tmp_buf_sem);
-
-
-static inline int __pmac
-serial_paranoia_check(struct mac_serial *info,
-		      char *name, const char *routine)
-{
-#ifdef SERIAL_PARANOIA_CHECK
-	static const char badmagic[] = KERN_WARNING
-		"Warning: bad magic number for serial struct %s in %s\n";
-	static const char badinfo[] = KERN_WARNING
-		"Warning: null mac_serial for %s in %s\n";
-
-	if (!info) {
-		printk(badinfo, name, routine);
-		return 1;
-	}
-	if (info->magic != SERIAL_MAGIC) {
-		printk(badmagic, name, routine);
-		return 1;
-	}
-#endif
-	return 0;
-}
-
-/* 
- * Reading and writing Z8530 registers.
- */
-static inline unsigned char __pmac read_zsreg(struct mac_zschannel *channel,
-					      unsigned char reg)
-{
-	unsigned char retval;
-	unsigned long flags;
-
-	/*
-	 * We have to make this atomic.
-	 */
-	spin_lock_irqsave(&channel->lock, flags);
-	if (reg != 0) {
-		*channel->control = reg;
-		RECOVERY_DELAY;
-	}
-	retval = *channel->control;
-	RECOVERY_DELAY;
-	spin_unlock_irqrestore(&channel->lock, flags);
-	return retval;
-}
-
-static inline void __pmac write_zsreg(struct mac_zschannel *channel,
-				      unsigned char reg, unsigned char value)
-{
-	unsigned long flags;
-
-	spin_lock_irqsave(&channel->lock, flags);
-	if (reg != 0) {
-		*channel->control = reg;
-		RECOVERY_DELAY;
-	}
-	*channel->control = value;
-	RECOVERY_DELAY;
-	spin_unlock_irqrestore(&channel->lock, flags);
-	return;
-}
-
-static inline unsigned char __pmac read_zsdata(struct mac_zschannel *channel)
-{
-	unsigned char retval;
-
-	retval = *channel->data;
-	RECOVERY_DELAY;
-	return retval;
-}
-
-static inline void write_zsdata(struct mac_zschannel *channel,
-				unsigned char value)
-{
-	*channel->data = value;
-	RECOVERY_DELAY;
-	return;
-}
-
-static inline void load_zsregs(struct mac_zschannel *channel,
-			       unsigned char *regs)
-{
-	ZS_CLEARERR(channel);
-	ZS_CLEARFIFO(channel);
-	/* Load 'em up */
-	write_zsreg(channel, R4, regs[R4]);
-	write_zsreg(channel, R10, regs[R10]);
-	write_zsreg(channel, R3, regs[R3] & ~RxENABLE);
-	write_zsreg(channel, R5, regs[R5] & ~TxENAB);
-	write_zsreg(channel, R1, regs[R1]);
-	write_zsreg(channel, R9, regs[R9]);
-	write_zsreg(channel, R11, regs[R11]);
-	write_zsreg(channel, R12, regs[R12]);
-	write_zsreg(channel, R13, regs[R13]);
-	write_zsreg(channel, R14, regs[R14]);
-	write_zsreg(channel, R15, regs[R15]);
-	write_zsreg(channel, R3, regs[R3]);
-	write_zsreg(channel, R5, regs[R5]);
-	return;
-}
-
-/* Sets or clears DTR/RTS on the requested line */
-static inline void zs_rtsdtr(struct mac_serial *ss, int set)
-{
-	if (set)
-		ss->curregs[5] |= (RTS | DTR);
-	else
-		ss->curregs[5] &= ~(RTS | DTR);
-	write_zsreg(ss->zs_channel, 5, ss->curregs[5]);
-	return;
-}
-
-/* Utility routines for the Zilog */
-static inline int get_zsbaud(struct mac_serial *ss)
-{
-	struct mac_zschannel *channel = ss->zs_channel;
-	int brg;
-
-	if ((ss->curregs[R11] & TCBR) == 0) {
-		/* higher rates don't use the baud rate generator */
-		return (ss->curregs[R4] & X32CLK)? ZS_CLOCK/32: ZS_CLOCK/16;
-	}
-	/* The baud rate is split up between two 8-bit registers in
-	 * what is termed 'BRG time constant' format in my docs for
-	 * the chip, it is a function of the clk rate the chip is
-	 * receiving which happens to be constant.
-	 */
-	brg = (read_zsreg(channel, 13) << 8);
-	brg |= read_zsreg(channel, 12);
-	return BRG_TO_BPS(brg, (ZS_CLOCK/(ss->clk_divisor)));
-}
-
-/* On receive, this clears errors and the receiver interrupts */
-static inline void rs_recv_clear(struct mac_zschannel *zsc)
-{
-	write_zsreg(zsc, 0, ERR_RES);
-	write_zsreg(zsc, 0, RES_H_IUS); /* XXX this is unnecessary */
-}
-
-/*
- * Reset a Descriptor-Based DMA channel.
- */
-static void dbdma_reset(volatile struct dbdma_regs *dma)
-{
-	int i;
-
-	out_le32(&dma->control, (WAKE|FLUSH|PAUSE|RUN) << 16);
-
-	/*
-	 * Yes this looks peculiar, but apparently it needs to be this
-	 * way on some machines.  (We need to make sure the DBDMA
-	 * engine has actually got the write above and responded
-	 * to it. - paulus)
-	 */
-	for (i = 200; i > 0; --i)
-		if (ld_le32(&dma->status) & RUN)
-			udelay(1);
-}
-
-/*
- * Tells a DBDMA channel to stop and write any buffered data
- * it might have to memory.
- */
-static _INLINE_ void dbdma_flush(volatile struct dbdma_regs *dma)
-{
-	int i = 0;
-
-	out_le32(&dma->control, (FLUSH << 16) | FLUSH);
-	while (((in_le32(&dma->status) & FLUSH) != 0) && (i++ < 100))
-		udelay(1);
-}
-
-/*
- * ----------------------------------------------------------------------
- *
- * Here starts the interrupt handling routines.  All of the following
- * subroutines are declared as inline and are folded into
- * rs_interrupt().  They were separated out for readability's sake.
- *
- * 				- Ted Ts'o ([email-masked]), 7-Mar-93
- * -----------------------------------------------------------------------
- */
-
-/*
- * This routine is used by the interrupt handler to schedule
- * processing in the software interrupt portion of the driver.
- */
-static _INLINE_ void rs_sched_event(struct mac_serial *info,
-				  int event)
-{
-	info->event |= 1 << event;
-	schedule_work(&info->tqueue);
-}
-
-/* Work out the flag value for a z8530 status value. */
-static _INLINE_ int stat_to_flag(int stat)
-{
-	int flag;
-
-	if (stat & Rx_OVR) {
-		flag = TTY_OVERRUN;
-	} else if (stat & FRM_ERR) {
-		flag = TTY_FRAME;
-	} else if (stat & PAR_ERR) {
-		flag = TTY_PARITY;
-	} else
-		flag = 0;
-	return flag;
-}
-
-static _INLINE_ void receive_chars(struct mac_serial *info,
-				   struct pt_regs *regs)
-{
-	struct tty_struct *tty = info->tty;
-	unsigned char ch, stat, flag;
-
-	while ((read_zsreg(info->zs_channel, 0) & Rx_CH_AV) != 0) {
-
-		stat = read_zsreg(info->zs_channel, R1);
-		ch = read_zsdata(info->zs_channel);
-
-#ifdef CONFIG_KGDB
-		if (info->kgdb_channel) {
-			if (ch == 0x03 || ch == '$')
-				breakpoint();
-			if (stat & (Rx_OVR|FRM_ERR|PAR_ERR))
-				write_zsreg(info->zs_channel, 0, ERR_RES);
-			return;
-		}
-#endif
-		if (!tty)
-			continue;
-		if (tty->flip.count >= TTY_FLIPBUF_SIZE)
-			tty_flip_buffer_push(tty);
-
-		if (tty->flip.count >= TTY_FLIPBUF_SIZE) {
-			static int flip_buf_ovf;
-			if (++flip_buf_ovf <= 1)
-				printk(KERN_WARNING "FB. overflow: %d\n",
-						    flip_buf_ovf);
-			break;
-		}
-		tty->flip.count++;
-		{
-			static int flip_max_cnt;
-			if (flip_max_cnt < tty->flip.count)
-				flip_max_cnt = tty->flip.count;
-		}
-		flag = stat_to_flag(stat);
-		if (flag)
-			/* reset the error indication */
-			write_zsreg(info->zs_channel, 0, ERR_RES);
-		*tty->flip.flag_buf_ptr++ = flag;
-		*tty->flip.char_buf_ptr++ = ch;
-	}
-	if (tty)
-		tty_flip_buffer_push(tty);
-}
-
-static void transmit_chars(struct mac_serial *info)
-{
-	if ((read_zsreg(info->zs_channel, 0) & Tx_BUF_EMP) == 0)
-		return;
-	info->tx_active = 0;
-
-	if (info->x_char && !info->power_wait) {
-		/* Send next char */
-		write_zsdata(info->zs_channel, info->x_char);
-		info->x_char = 0;
-		info->tx_active = 1;
-		return;
-	}
-
-	if ((info->xmit_cnt <= 0) || info->tty->stopped || info->tx_stopped
-	    || info->power_wait) {
-		write_zsreg(info->zs_channel, 0, RES_Tx_P);
-		return;
-	}
-
-	/* Send char */
-	write_zsdata(info->zs_channel, info->xmit_buf[info->xmit_tail++]);
-	info->xmit_tail = info->xmit_tail & (SERIAL_XMIT_SIZE-1);
-	info->xmit_cnt--;
-	info->tx_active = 1;
-
-	if (info->xmit_cnt < WAKEUP_CHARS)
-		rs_sched_event(info, RS_EVENT_WRITE_WAKEUP);
-}
-
-static void powerup_done(unsigned long data)
-{
-	struct mac_serial *info = (struct mac_serial *) data;
-	unsigned long flags;
-
-	spin_lock_irqsave(&info->lock, flags);
-	info->power_wait = 0;
-	transmit_chars(info);
-	spin_unlock_irqrestore(&info->lock, flags);
-}
-
-static _INLINE_ void status_handle(struct mac_serial *info)
-{
-	unsigned char status;
-
-	/* Get status from Read Register 0 */
-	status = read_zsreg(info->zs_channel, 0);
-
-	/* Check for DCD transitions */
-	if (((status ^ info->read_reg_zero) & DCD) != 0
-	    && info->tty && !C_CLOCAL(info->tty)) {
-		if (status & DCD) {
-			wake_up_interruptible(&info->open_wait);
-		} else {
-			if (info->tty)
-				tty_hangup(info->tty);
-		}
-	}
-
-	/* Check for CTS transitions */
-	if (info->tty && C_CRTSCTS(info->tty)) {
-		/*
-		 * For some reason, on the Power Macintosh,
-		 * it seems that the CTS bit is 1 when CTS is
-		 * *negated* and 0 when it is asserted.
-		 * The DCD bit doesn't seem to be inverted
-		 * like this.
-		 */
-		if ((status & CTS) == 0) {
-			if (info->tx_stopped) {
-#ifdef SERIAL_DEBUG_FLOW
-				printk(KERN_DEBUG "CTS up\n");
-#endif
-				info->tx_stopped = 0;
-				if (!info->tx_active)
-					transmit_chars(info);
-			}
-		} else {
-#ifdef SERIAL_DEBUG_FLOW
-			printk(KERN_DEBUG "CTS down\n");
-#endif
-			info->tx_stopped = 1;
-		}
-	}
-
-	/* Clear status condition... */
-	write_zsreg(info->zs_channel, 0, RES_EXT_INT);
-	info->read_reg_zero = status;
-}
-
-static _INLINE_ void receive_special_dma(struct mac_serial *info)
-{
-	unsigned char stat, flag;
-	volatile struct dbdma_regs *rd = &info->rx->dma;
-	int where = RX_BUF_SIZE;
-
-	spin_lock(&info->rx_dma_lock);
-	if ((ld_le32(&rd->status) & ACTIVE) != 0)
-		dbdma_flush(rd);
-	if (in_le32(&rd->cmdptr)
-	    == virt_to_bus(info->rx_cmds[info->rx_cbuf] + 1))
-		where -= in_le16(&info->rx->res_count);
-	where--;
-
-	stat = read_zsreg(info->zs_channel, R1);
-
-	flag = stat_to_flag(stat);
-	if (flag) {
-		info->rx_flag_buf[info->rx_cbuf][where] = flag;
-		/* reset the error indication */
-		write_zsreg(info->zs_channel, 0, ERR_RES);
-	}
-
-	spin_unlock(&info->rx_dma_lock);
-}
-
-/*
- * This is the serial driver's generic interrupt routine
- */
-static irqreturn_t rs_interrupt(int irq, void *dev_id, struct pt_regs * regs)
-{
-	struct mac_serial *info = (struct mac_serial *) dev_id;
-	unsigned char zs_intreg;
-	int shift;
-	unsigned long flags;
-	int handled = 0;
-
-	if (!(info->flags & ZILOG_INITIALIZED)) {
-		printk(KERN_WARNING "rs_interrupt: irq %d, port not "
-				    "initialized\n", irq);
-		disable_irq(irq);
-		return IRQ_NONE;
-	}
-
-	/* NOTE: The read register 3, which holds the irq status,
-	 *       does so for both channels on each chip.  Although
-	 *       the status value itself must be read from the A
-	 *       channel and is only valid when read from channel A.
-	 *       Yes... broken hardware...
-	 */
-#define CHAN_IRQMASK (CHBRxIP | CHBTxIP | CHBEXT)
-
-	if (info->zs_chan_a == info->zs_channel)
-		shift = 3;	/* Channel A */
-	else
-		shift = 0;	/* Channel B */
-
-	spin_lock_irqsave(&info->lock, flags);
-	for (;;) {
-		zs_intreg = read_zsreg(info->zs_chan_a, 3) >> shift;
-#ifdef SERIAL_DEBUG_INTR
-		printk(KERN_DEBUG "rs_interrupt: irq %d, zs_intreg 0x%x\n",
-		       irq, (int)zs_intreg);
-#endif
-
-		if ((zs_intreg & CHAN_IRQMASK) == 0)
-			break;
-		handled = 1;
-
-		if (zs_intreg & CHBRxIP) {
-			/* If we are doing DMA, we only ask for interrupts
-			   on characters with errors or special conditions. */
-			if (info->dma_initted)
-				receive_special_dma(info);
-			else
-				receive_chars(info, regs);
-		}
-		if (zs_intreg & CHBTxIP)
-			transmit_chars(info);
-		if (zs_intreg & CHBEXT)
-			status_handle(info);
-	}
-	spin_unlock_irqrestore(&info->lock, flags);
-	return IRQ_RETVAL(handled);
-}
-
-/* Transmit DMA interrupt - not used at present */
-static irqreturn_t rs_txdma_irq(int irq, void *dev_id, struct pt_regs *regs)
-{
-	return IRQ_HANDLED;
-}
-
-/*
- * Receive DMA interrupt.
- */
-static irqreturn_t rs_rxdma_irq(int irq, void *dev_id, struct pt_regs *regs)
-{
-	struct mac_serial *info = (struct mac_serial *) dev_id;
-	volatile struct dbdma_cmd *cd;
-
-	if (!info->dma_initted)
-		return IRQ_NONE;
-	spin_lock(&info->rx_dma_lock);
-	/* First, confirm that this interrupt is, indeed, coming */
-	/* from Rx DMA */
-	cd = info->rx_cmds[info->rx_cbuf] + 2;
-	if ((in_le16(&cd->xfer_status) & (RUN | ACTIVE)) != (RUN | ACTIVE)) {
-		spin_unlock(&info->rx_dma_lock);
-		return IRQ_NONE;
-	}
-	if (info->rx_fbuf != RX_NO_FBUF) {
-		info->rx_cbuf = info->rx_fbuf;
-		if (++info->rx_fbuf == info->rx_nbuf)
-			info->rx_fbuf = 0;
-		if (info->rx_fbuf == info->rx_ubuf)
-			info->rx_fbuf = RX_NO_FBUF;
-	}
-	spin_unlock(&info->rx_dma_lock);
-	return IRQ_HANDLED;
-}
-
-/*
- * -------------------------------------------------------------------
- * Here ends the serial interrupt routines.
- * -------------------------------------------------------------------
- */
-
-/*
- * ------------------------------------------------------------
- * rs_stop() and rs_start()
- *
- * This routines are called before setting or resetting tty->stopped.
- * ------------------------------------------------------------
- */
-static void rs_stop(struct tty_struct *tty)
-{
-	struct mac_serial *info = (struct mac_serial *)tty->driver_data;
-
-#ifdef SERIAL_DEBUG_STOP
-	printk(KERN_DEBUG "rs_stop %ld....\n",
-	       tty->ldisc.chars_in_buffer(tty));
-#endif
-
-	if (serial_paranoia_check(info, tty->name, "rs_stop"))
-		return;
-
-#if 0
-	spin_lock_irqsave(&info->lock, flags);
-	if (info->curregs[5] & TxENAB) {
-		info->curregs[5] &= ~TxENAB;
-		info->pendregs[5] &= ~TxENAB;
-		write_zsreg(info->zs_channel, 5, info->curregs[5]);
-	}
-	spin_unlock_irqrestore(&info->lock, flags);
-#endif
-}
-
-static void rs_start(struct tty_struct *tty)
-{
-	struct mac_serial *info = (struct mac_serial *)tty->driver_data;
-	unsigned long flags;
-
-#ifdef SERIAL_DEBUG_STOP
-	printk(KERN_DEBUG "rs_start %ld....\n", 
-	       tty->ldisc.chars_in_buffer(tty));
-#endif
-
-	if (serial_paranoia_check(info, tty->name, "rs_start"))
-		return;
-
-	spin_lock_irqsave(&info->lock, flags);
-#if 0
-	if (info->xmit_cnt && info->xmit_buf && !(info->curregs[5] & TxENAB)) {
-		info->curregs[5] |= TxENAB;
-		info->pendregs[5] = info->curregs[5];
-		write_zsreg(info->zs_channel, 5, info->curregs[5]);
-	}
-#else
-	if (info->xmit_cnt && info->xmit_buf && !info->tx_active) {
-		transmit_chars(info);
-	}
-#endif
-	spin_unlock_irqrestore(&info->lock, flags);
-}
-
-static void do_softint(void *private_)
-{
-	struct mac_serial	*info = (struct mac_serial *) private_;
-	struct tty_struct	*tty;
-
-	tty = info->tty;
-	if (!tty)
-		return;
-
-	if (test_and_clear_bit(RS_EVENT_WRITE_WAKEUP, &info->event))
-		tty_wakeup(tty);
-}
-
-static int startup(struct mac_serial * info)
-{
-	int delay;
-
-	OPNDBG("startup() (ttyS%d, irq %d)\n", info->line, info->irq);
- 
-	if (info->flags & ZILOG_INITIALIZED) {
-		OPNDBG(" -> already inited\n");
- 		return 0;
-	}
-
-	if (!info->xmit_buf) {
-		info->xmit_buf = (unsigned char *) get_zeroed_page(GFP_KERNEL);
-		if (!info->xmit_buf)
-			return -ENOMEM;
-	}
-
-	OPNDBG("starting up ttyS%d (irq %d)...\n", info->line, info->irq);
-
-	delay = set_scc_power(info, 1);
-
-	setup_scc(info);
-
-	if (delay) {
-		unsigned long flags;
-
-		/* delay is in ms */
-		spin_lock_irqsave(&info->lock, flags);
-		info->power_wait = 1;
-		mod_timer(&info->powerup_timer,
-			  jiffies + (delay * HZ + 999) / 1000);
-		spin_unlock_irqrestore(&info->lock, flags);
-	}
-
-	OPNDBG("enabling IRQ on ttyS%d (irq %d)...\n", info->line, info->irq);
-
-	info->flags |= ZILOG_INITIALIZED;
-	enable_irq(info->irq);
-	if (info->dma_initted) {
-		enable_irq(info->rx_dma_irq);
-	}
-
-	return 0;
-}
-
-static _INLINE_ void rxdma_start(struct mac_serial * info, int curr)
-{
-	volatile struct dbdma_regs *rd = &info->rx->dma;
-	volatile struct dbdma_cmd *cd = info->rx_cmds[curr];
-
-//printk(KERN_DEBUG "SCC: rxdma_start\n");
-
-	st_le32(&rd->cmdptr, virt_to_bus(cd));
-	out_le32(&rd->control, (RUN << 16) | RUN);
-}
-
-static void rxdma_to_tty(struct mac_serial *info)
-{
-	struct tty_struct	*tty = info->tty;
-	volatile struct dbdma_regs *rd = &info->rx->dma;
-	unsigned long flags;
-	int residue, available, space, do_queue;
-
-	if (!tty)
-		return;
-
-	do_queue = 0;
-	spin_lock_irqsave(&info->rx_dma_lock, flags);
-more:
-	space = TTY_FLIPBUF_SIZE - tty->flip.count;
-	if (!space) {
-		do_queue++;
-		goto out;
-	}
-	residue = 0;
-	if (info->rx_ubuf == info->rx_cbuf) {
-		if ((ld_le32(&rd->status) & ACTIVE) != 0) {
-			dbdma_flush(rd);
-			if (in_le32(&rd->cmdptr)
-			    == virt_to_bus(info->rx_cmds[info->rx_cbuf]+1))
-				residue = in_le16(&info->rx->res_count);
-		}
-	}
-	available = RX_BUF_SIZE - residue - info->rx_done_bytes;
-	if (available > space)
-		available = space;
-	if (available) {
-		memcpy(tty->flip.char_buf_ptr,
-		       info->rx_char_buf[info->rx_ubuf] + info->rx_done_bytes,
-		       available);
-		memcpy(tty->flip.flag_buf_ptr,
-		       info->rx_flag_buf[info->rx_ubuf] + info->rx_done_bytes,
-		       available);
-		tty->flip.char_buf_ptr += available;
-		tty->flip.count += available;
-		tty->flip.flag_buf_ptr += available;
-		memset(info->rx_flag_buf[info->rx_ubuf] + info->rx_done_bytes,
-		       0, available);
-		info->rx_done_bytes += available;
-		do_queue++;
-	}
-	if (info->rx_done_bytes == RX_BUF_SIZE) {
-		volatile struct dbdma_cmd *cd = info->rx_cmds[info->rx_ubuf];
-
-		if (info->rx_ubuf == info->rx_cbuf)
-			goto out;
-		/* mark rx_char_buf[rx_ubuf] free */
-		st_le16(&cd->command, DBDMA_NOP);
-		cd++;
-		st_le32(&cd->cmd_dep, 0);
-		st_le32((unsigned int *)&cd->res_count, 0);
-		cd++;
-		st_le16(&cd->xfer_status, 0);
-
-		if (info->rx_fbuf == RX_NO_FBUF) {
-			info->rx_fbuf = info->rx_ubuf;
-			if (!(ld_le32(&rd->status) & ACTIVE)) {
-				dbdma_reset(&info->rx->dma);
-				rxdma_start(info, info->rx_ubuf);
-				info->rx_cbuf = info->rx_ubuf;
-			}
-		}
-		info->rx_done_bytes = 0;
-		if (++info->rx_ubuf == info->rx_nbuf)
-			info->rx_ubuf = 0;
-		if (info->rx_fbuf == info->rx_ubuf)
-			info->rx_fbuf = RX_NO_FBUF;
-		goto more;
-	}
-out:
-	spin_unlock_irqrestore(&info->rx_dma_lock, flags);
-	if (do_queue)
-		tty_flip_buffer_push(tty);
-}
-
-static void poll_rxdma(unsigned long private_)
-{
-	struct mac_serial	*info = (struct mac_serial *) private_;
-	unsigned long flags;
-
-	rxdma_to_tty(info);
-	spin_lock_irqsave(&info->rx_dma_lock, flags);
-	mod_timer(&info->poll_dma_timer, RX_DMA_TIMER);
-	spin_unlock_irqrestore(&info->rx_dma_lock, flags);
-}
-
-static void dma_init(struct mac_serial * info)
-{
-	int i, size;
-	volatile struct dbdma_cmd *cd;
-	unsigned char *p;
-
-	info->rx_nbuf = 8;
-
-	/* various mem set up */
-	size = sizeof(struct dbdma_cmd) * (3 * info->rx_nbuf + 2)
-		+ (RX_BUF_SIZE * 2 + sizeof(*info->rx_cmds)
-		   + sizeof(*info->rx_char_buf) + sizeof(*info->rx_flag_buf))
-		* info->rx_nbuf;
-	info->dma_priv = kmalloc(size, GFP_KERNEL | GFP_DMA);
-	if (info->dma_priv == NULL)
-		return;
-	memset(info->dma_priv, 0, size);
-
-	info->rx_cmds = (volatile struct dbdma_cmd **)info->dma_priv;
-	info->rx_char_buf = (unsigned char **) (info->rx_cmds + info->rx_nbuf);
-	info->rx_flag_buf = info->rx_char_buf + info->rx_nbuf;
-	p = (unsigned char *) (info->rx_flag_buf + info->rx_nbuf);
-	for (i = 0; i < info->rx_nbuf; i++, p += RX_BUF_SIZE)
-		info->rx_char_buf[i] = p;
-	for (i = 0; i < info->rx_nbuf; i++, p += RX_BUF_SIZE)
-		info->rx_flag_buf[i] = p;
-
-	/* a bit of DMA programming */
-	cd = info->rx_cmds[0] = (volatile struct dbdma_cmd *) DBDMA_ALIGN(p);
-	st_le16(&cd->command, DBDMA_NOP);
-	cd++;
-	st_le16(&cd->req_count, RX_BUF_SIZE);
-	st_le16(&cd->command, INPUT_MORE);
-	st_le32(&cd->phy_addr, virt_to_bus(info->rx_char_buf[0]));
-	cd++;
-	st_le16(&cd->req_count, 4);
-	st_le16(&cd->command, STORE_WORD | INTR_ALWAYS);
-	st_le32(&cd->phy_addr, virt_to_bus(cd-2));
-	st_le32(&cd->cmd_dep, DBDMA_STOP);
-	for (i = 1; i < info->rx_nbuf; i++) {
-		info->rx_cmds[i] = ++cd;
-		st_le16(&cd->command, DBDMA_NOP);
-		cd++;
-		st_le16(&cd->req_count, RX_BUF_SIZE);
-		st_le16(&cd->command, INPUT_MORE);
-		st_le32(&cd->phy_addr, virt_to_bus(info->rx_char_buf[i]));
-		cd++;
-		st_le16(&cd->req_count, 4);
-		st_le16(&cd->command, STORE_WORD | INTR_ALWAYS);
-		st_le32(&cd->phy_addr, virt_to_bus(cd-2));
-		st_le32(&cd->cmd_dep, DBDMA_STOP);
-	}
-	cd++;
-	st_le16(&cd->command, DBDMA_NOP | BR_ALWAYS);
-	st_le32(&cd->cmd_dep, virt_to_bus(info->rx_cmds[0]));
-
-	/* setup DMA to our liking */
-	dbdma_reset(&info->rx->dma);
-	st_le32(&info->rx->dma.intr_sel, 0x10001);
-	st_le32(&info->rx->dma.br_sel, 0x10001);
-	out_le32(&info->rx->dma.wait_sel, 0x10001);
-
-	/* set various flags */
-	info->rx_ubuf = 0;
-	info->rx_cbuf = 0;
-	info->rx_fbuf = info->rx_ubuf + 1;
-	if (info->rx_fbuf == info->rx_nbuf)
-		info->rx_fbuf = RX_NO_FBUF;
-	info->rx_done_bytes = 0;
-
-	/* setup polling */
-	init_timer(&info->poll_dma_timer);
-	info->poll_dma_timer.function = (void *)&poll_rxdma;
-	info->poll_dma_timer.data = (unsigned long)info;
-
-	info->dma_initted = 1;
-}
-
-/*
- * FixZeroBug....Works around a bug in the SCC receving channel.
- * Taken from Darwin code, 15 Sept. 2000  -DanM
- *
- * The following sequence prevents a problem that is seen with O'Hare ASICs
- * (most versions -- also with some Heathrow and Hydra ASICs) where a zero
- * at the input to the receiver becomes 'stuck' and locks up the receiver.
- * This problem can occur as a result of a zero bit at the receiver input
- * coincident with any of the following events:
- *
- *	The SCC is initialized (hardware or software).
- *	A framing error is detected.
- *	The clocking option changes from synchronous or X1 asynchronous
- *		clocking to X16, X32, or X64 asynchronous clocking.
- *	The decoding mode is changed among NRZ, NRZI, FM0, or FM1.
- *
- * This workaround attempts to recover from the lockup condition by placing
- * the SCC in synchronous loopback mode with a fast clock before programming
- * any of the asynchronous modes.
- */
-static void fix_zero_bug_scc(struct mac_serial * info)
-{
-	write_zsreg(info->zs_channel, 9,
-		    (info->zs_channel == info->zs_chan_a? CHRA: CHRB));
-	udelay(10);
-	write_zsreg(info->zs_channel, 9,
-		    ((info->zs_channel == info->zs_chan_a? CHRA: CHRB) | NV));
-
-	write_zsreg(info->zs_channel, 4, (X1CLK | EXTSYNC));
-
-	/* I think this is wrong....but, I just copying code....
-	*/
-	write_zsreg(info->zs_channel, 3, (8 & ~RxENABLE));
-
-	write_zsreg(info->zs_channel, 5, (8 & ~TxENAB));
-	write_zsreg(info->zs_channel, 9, NV);	/* Didn't we already do this? */
-	write_zsreg(info->zs_channel, 11, (RCBR | TCBR));
-	write_zsreg(info->zs_channel, 12, 0);
-	write_zsreg(info->zs_channel, 13, 0);
-	write_zsreg(info->zs_channel, 14, (LOOPBAK | SSBR));
-	write_zsreg(info->zs_channel, 14, (LOOPBAK | SSBR | BRENABL));
-	write_zsreg(info->zs_channel, 3, (8 | RxENABLE));
-	write_zsreg(info->zs_channel, 0, RES_EXT_INT);
-	write_zsreg(info->zs_channel, 0, RES_EXT_INT);	/* to kill some time */
-
-	/* The channel should be OK now, but it is probably receiving
-	 * loopback garbage.
-	 * Switch to asynchronous mode, disable the receiver,
-	 * and discard everything in the receive buffer.
-	 */
-	write_zsreg(info->zs_channel, 9, NV);
-	write_zsreg(info->zs_channel, 4, PAR_ENA);
-	write_zsreg(info->zs_channel, 3, (8 & ~RxENABLE));
-
-	while (read_zsreg(info->zs_channel, 0) & Rx_CH_AV) {
-		(void)read_zsreg(info->zs_channel, 8);
-		write_zsreg(info->zs_channel, 0, RES_EXT_INT);
-		write_zsreg(info->zs_channel, 0, ERR_RES);
-	}
-}
-
-static int setup_scc(struct mac_serial * info)
-{
-	unsigned long flags;
-
-	OPNDBG("setting up ttyS%d SCC...\n", info->line);
-
-	spin_lock_irqsave(&info->lock, flags);
-
-	/* Nice buggy HW ... */
-	fix_zero_bug_scc(info);
-
-	/*
-	 * Reset the chip.
-	 */
-	write_zsreg(info->zs_channel, 9,
-		    (info->zs_channel == info->zs_chan_a? CHRA: CHRB));
-	udelay(10);
-	write_zsreg(info->zs_channel, 9, 0);
-
-	/*
-	 * Clear the receive FIFO.
-	 */
-	ZS_CLEARFIFO(info->zs_channel);
-	info->xmit_fifo_size = 1;
-
-	/*
-	 * Reset DMAs
-	 */
-	if (info->has_dma)
-		dma_init(info);
-
-	/*
-	 * Clear the interrupt registers.
-	 */
-	write_zsreg(info->zs_channel, 0, ERR_RES);
-	write_zsreg(info->zs_channel, 0, RES_H_IUS);
-
-	/*
-	 * Turn on RTS and DTR.
-	 */
-	if (!info->is_irda)
-		zs_rtsdtr(info, 1);
-
-	/*
-	 * Finally, enable sequencing and interrupts
-	 */
-	if (!info->dma_initted) {
-		/* interrupt on ext/status changes, all received chars,
-		   transmit ready */
-		info->curregs[1] = (info->curregs[1] & ~0x18)
-				| (EXT_INT_ENAB | INT_ALL_Rx | TxINT_ENAB);
-	} else {
-		/* interrupt on ext/status changes, W/Req pin is
-		   receive DMA request */
-		info->curregs[1] = (info->curregs[1] & ~(0x18 | TxINT_ENAB))
-				| (EXT_INT_ENAB | WT_RDY_RT | WT_FN_RDYFN);
-		write_zsreg(info->zs_channel, 1, info->curregs[1]);
-		/* enable W/Req pin */
-		info->curregs[1] |= WT_RDY_ENAB;
-		write_zsreg(info->zs_channel, 1, info->curregs[1]);
-		/* enable interrupts on transmit ready and receive errors */
-		info->curregs[1] |= INT_ERR_Rx | TxINT_ENAB;
-	}
-	info->pendregs[1] = info->curregs[1];
-	info->curregs[3] |= (RxENABLE | Rx8);
-	info->pendregs[3] = info->curregs[3];
-	info->curregs[5] |= (TxENAB | Tx8);
-	info->pendregs[5] = info->curregs[5];
-	info->curregs[9] |= (NV | MIE);
-	info->pendregs[9] = info->curregs[9];
-	write_zsreg(info->zs_channel, 3, info->curregs[3]);
-	write_zsreg(info->zs_channel, 5, info->curregs[5]);
-	write_zsreg(info->zs_channel, 9, info->curregs[9]);
-
-	if (info->tty)
-		clear_bit(TTY_IO_ERROR, &info->tty->flags);
-	info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
-
-	spin_unlock_irqrestore(&info->lock, flags);
-
-	/*
-	 * Set the speed of the serial port
-	 */
-	change_speed(info, 0);
-
-	/* Save the current value of RR0 */
-	info->read_reg_zero = read_zsreg(info->zs_channel, 0);
-
-	if (info->dma_initted) {
-		spin_lock_irqsave(&info->rx_dma_lock, flags);
-		rxdma_start(info, 0);
-		info->poll_dma_timer.expires = RX_DMA_TIMER;
-		add_timer(&info->poll_dma_timer);
-		spin_unlock_irqrestore(&info->rx_dma_lock, flags);
-	}
-
-	return 0;
-}
-
-/*
- * This routine will shutdown a serial port; interrupts are disabled, and
- * DTR is dropped if the hangup on close termio flag is on.
- */
-static void shutdown(struct mac_serial * info)
-{
-	OPNDBG("Shutting down serial port %d (irq %d)....\n", info->line,
-	       info->irq);
-
-	if (!(info->flags & ZILOG_INITIALIZED)) {
-		OPNDBG("(already shutdown)\n");
-		return;
-	}
-
-	if (info->has_dma) {
-		del_timer(&info->poll_dma_timer);
-		dbdma_reset(info->tx_dma);
-		dbdma_reset(&info->rx->dma);
-		disable_irq(info->tx_dma_irq);
-		disable_irq(info->rx_dma_irq);
-	}
-	disable_irq(info->irq);
-
-	info->pendregs[1] = info->curregs[1] = 0;
-	write_zsreg(info->zs_channel, 1, 0);	/* no interrupts */
-
-	info->curregs[3] &= ~RxENABLE;
-	info->pendregs[3] = info->curregs[3];
-	write_zsreg(info->zs_channel, 3, info->curregs[3]);
-
-	info->curregs[5] &= ~TxENAB;
-	if (!info->tty || C_HUPCL(info->tty))
-		info->curregs[5] &= ~DTR;
-	info->pendregs[5] = info->curregs[5];
-	write_zsreg(info->zs_channel, 5, info->curregs[5]);
-
-	if (info->tty)
-		set_bit(TTY_IO_ERROR, &info->tty->flags);
-
-	set_scc_power(info, 0);
-
-	if (info->xmit_buf) {
-		free_page((unsigned long) info->xmit_buf);
-		info->xmit_buf = 0;
-	}
-
-	if (info->has_dma && info->dma_priv) {
-		kfree(info->dma_priv);
-		info->dma_priv = NULL;
-		info->dma_initted = 0;
-	}
-
-	memset(info->curregs, 0, sizeof(info->curregs));
-	memset(info->pendregs, 0, sizeof(info->pendregs));
-
-	info->flags &= ~ZILOG_INITIALIZED;
-}
-
-/*
- * Turn power on or off to the SCC and associated stuff
- * (port drivers, modem, IR port, etc.)
- * Returns the number of milliseconds we should wait before
- * trying to use the port.
- */
-static int set_scc_power(struct mac_serial * info, int state)
-{
-	int delay = 0;
-
-	if (state) {
-		PWRDBG("ttyS%d: powering up hardware\n", info->line);
-		pmac_call_feature(
-			PMAC_FTR_SCC_ENABLE,
-			info->dev_node, info->port_type, 1);
-		if (info->is_internal_modem) {
-			pmac_call_feature(
-				PMAC_FTR_MODEM_ENABLE,
-				info->dev_node, 0, 1);
-			delay = 2500;	/* wait for 2.5s before using */
-		} else if (info->is_irda)
-			mdelay(50);	/* Do better here once the problems
-			                 * with blocking have been ironed out
-			                 */
-	} else {
-		/* TODO: Make that depend on a timer, don't power down
-		 * immediately
-		 */
-		PWRDBG("ttyS%d: shutting down hardware\n", info->line);
-		if (info->is_internal_modem) {
-			PWRDBG("ttyS%d: shutting down modem\n", info->line);
-			pmac_call_feature(
-				PMAC_FTR_MODEM_ENABLE,
-				info->dev_node, 0, 0);
-		}
-		pmac_call_feature(
-			PMAC_FTR_SCC_ENABLE,
-			info->dev_node, info->port_type, 0);
-	}
-	return delay;
-}
-
-static void irda_rts_pulses(struct mac_serial *info, int w)
-{
-	udelay(w);
-	write_zsreg(info->zs_channel, 5, Tx8 | TxENAB);
-	udelay(2);
-	write_zsreg(info->zs_channel, 5, Tx8 | TxENAB | RTS);
-	udelay(8);
-	write_zsreg(info->zs_channel, 5, Tx8 | TxENAB);
-	udelay(4);
-	write_zsreg(info->zs_channel, 5, Tx8 | TxENAB | RTS);
-}
-
-/*
- * Set the irda codec on the imac to the specified baud rate.
- */
-static void irda_setup(struct mac_serial *info)
-{
-	int code, speed, t;
-
-	speed = info->tty->termios->c_cflag & CBAUD;
-	if (speed < B2400 || speed > B115200)
-		return;
-	code = 0x4d + B115200 - speed;
-
-	/* disable serial interrupts and receive DMA */
-	write_zsreg(info->zs_channel, 1, info->curregs[1] & ~0x9f);
-
-	/* wait for transmitter to drain */
-	t = 10000;
-	while ((read_zsreg(info->zs_channel, 0) & Tx_BUF_EMP) == 0
-	       || (read_zsreg(info->zs_channel, 1) & ALL_SNT) == 0) {
-		if (--t <= 0) {
-			printk(KERN_ERR "transmitter didn't drain\n");
-			return;
-		}
-		udelay(10);
-	}
-	udelay(100);
-
-	/* set to 8 bits, no parity, 19200 baud, RTS on, DTR off */
-	write_zsreg(info->zs_channel, 4, X16CLK | SB1);
-	write_zsreg(info->zs_channel, 11, TCBR | RCBR);
-	t = BPS_TO_BRG(19200, ZS_CLOCK/16);
-	write_zsreg(info->zs_channel, 12, t);
-	write_zsreg(info->zs_channel, 13, t >> 8);
-	write_zsreg(info->zs_channel, 14, BRENABL);
-	write_zsreg(info->zs_channel, 3, Rx8 | RxENABLE);
-	write_zsreg(info->zs_channel, 5, Tx8 | TxENAB | RTS);
-
-	/* set TxD low for ~104us and pulse RTS */
-	udelay(1000);
-	write_zsdata(info->zs_channel, 0xfe);
-	irda_rts_pulses(info, 150);
-	irda_rts_pulses(info, 180);
-	irda_rts_pulses(info, 50);
-	udelay(100);
-
-	/* assert DTR, wait 30ms, talk to the chip */
-	write_zsreg(info->zs_channel, 5, Tx8 | TxENAB | RTS | DTR);
-	mdelay(30);
-	while (read_zsreg(info->zs_channel, 0) & Rx_CH_AV)
-		read_zsdata(info->zs_channel);
-
-	write_zsdata(info->zs_channel, 1);
-	t = 1000;
-	while ((read_zsreg(info->zs_channel, 0) & Rx_CH_AV) == 0) {
-		if (--t <= 0) {
-			printk(KERN_ERR "irda_setup timed out on 1st byte\n");
-			goto out;
-		}
-		udelay(10);
-	}
-	t = read_zsdata(info->zs_channel);
-	if (t != 4)
-		printk(KERN_ERR "irda_setup 1st byte = %x\n", t);
-
-	write_zsdata(info->zs_channel, code);
-	t = 1000;
-	while ((read_zsreg(info->zs_channel, 0) & Rx_CH_AV) == 0) {
-		if (--t <= 0) {
-			printk(KERN_ERR "irda_setup timed out on 2nd byte\n");
-			goto out;
-		}
-		udelay(10);
-	}
-	t = read_zsdata(info->zs_channel);
-	if (t != code)
-		printk(KERN_ERR "irda_setup 2nd byte = %x (%x)\n", t, code);
-
-	/* Drop DTR again and do some more RTS pulses */
- out:
-	udelay(100);
-	write_zsreg(info->zs_channel, 5, Tx8 | TxENAB | RTS);
-	irda_rts_pulses(info, 80);
-
-	/* We should be right to go now.  We assume that load_zsregs
-	   will get called soon to load up the correct baud rate etc. */
-	info->curregs[5] = (info->curregs[5] | RTS) & ~DTR;
-	info->pendregs[5] = info->curregs[5];
-}
-
-/*
- * This routine is called to set the UART divisor registers to match
- * the specified baud rate for a serial port.
- */
-static void change_speed(struct mac_serial *info, struct termios *old_termios)
-{
-	unsigned cflag;
-	int	bits;
-	int	brg, baud;
-	unsigned long flags;
-
-	if (!info->tty || !info->tty->termios)
-		return;
-
-	cflag = info->tty->termios->c_cflag;
-	baud = tty_get_baud_rate(info->tty);
-	if (baud == 0) {
-		if (old_termios) {
-			info->tty->termios->c_cflag &= ~CBAUD;
-			info->tty->termios->c_cflag |= (old_termios->c_cflag & CBAUD);
-			cflag = info->tty->termios->c_cflag;
-			baud = tty_get_baud_rate(info->tty);
-		}
-		else
-			baud = info->zs_baud;
-	}
-	if (baud > 230400)
-		baud = 230400;
-	else if (baud == 0)
-		baud = 38400;
-
-	spin_lock_irqsave(&info->lock, flags);
-	info->zs_baud = baud;
-	info->clk_divisor = 16;
-
-	BAUDBG(KERN_DEBUG "set speed to %d bds, ", baud);
-
-	switch (baud) {
-	case ZS_CLOCK/16:	/* 230400 */
-		info->curregs[4] = X16CLK;
-		info->curregs[11] = 0;
-		break;
-	case ZS_CLOCK/32:	/* 115200 */
-		info->curregs[4] = X32CLK;
-		info->curregs[11] = 0;
-		break;
-	default:
-		info->curregs[4] = X16CLK;
-		info->curregs[11] = TCBR | RCBR;
-		brg = BPS_TO_BRG(baud, ZS_CLOCK/info->clk_divisor);
-		info->curregs[12] = (brg & 255);
-		info->curregs[13] = ((brg >> 8) & 255);
-		info->curregs[14] = BRENABL;
-	}
-
-	/* byte size and parity */
-	info->curregs[3] &= ~RxNBITS_MASK;
-	info->curregs[5] &= ~TxNBITS_MASK;
-	switch (cflag & CSIZE) {
-	case CS5:
-		info->curregs[3] |= Rx5;
-		info->curregs[5] |= Tx5;
-		BAUDBG("5 bits, ");
-		bits = 7;
-		break;
-	case CS6:
-		info->curregs[3] |= Rx6;
-		info->curregs[5] |= Tx6;
-		BAUDBG("6 bits, ");
-		bits = 8;
-		break;
-	case CS7:
-		info->curregs[3] |= Rx7;
-		info->curregs[5] |= Tx7;
-		BAUDBG("7 bits, ");
-		bits = 9;
-		break;
-	case CS8:
-	default: /* defaults to 8 bits */
-		info->curregs[3] |= Rx8;
-		info->curregs[5] |= Tx8;
-		BAUDBG("8 bits, ");
-		bits = 10;
-		break;
-	}
-	info->pendregs[3] = info->curregs[3];
-	info->pendregs[5] = info->curregs[5];
-
-	info->curregs[4] &= ~(SB_MASK | PAR_ENA | PAR_EVEN);
-	if (cflag & CSTOPB) {
-		info->curregs[4] |= SB2;
-		bits++;
-		BAUDBG("2 stop, ");
-	} else {
-		info->curregs[4] |= SB1;
-		BAUDBG("1 stop, ");
-	}
-	if (cflag & PARENB) {
-		bits++;
- 		info->curregs[4] |= PAR_ENA;
-		BAUDBG("parity, ");
-	}
-	if (!(cflag & PARODD)) {
-		info->curregs[4] |= PAR_EVEN;
-	}
-	info->pendregs[4] = info->curregs[4];
-
-	if (!(cflag & CLOCAL)) {
-		if (!(info->curregs[15] & DCDIE))
-			info->read_reg_zero = read_zsreg(info->zs_channel, 0);
-		info->curregs[15] |= DCDIE;
-	} else
-		info->curregs[15] &= ~DCDIE;
-	if (cflag & CRTSCTS) {
-		info->curregs[15] |= CTSIE;
-		if ((read_zsreg(info->zs_channel, 0) & CTS) != 0)
-			info->tx_stopped = 1;
-	} else {
-		info->curregs[15] &= ~CTSIE;
-		info->tx_stopped = 0;
-	}
-	info->pendregs[15] = info->curregs[15];
-
-	/* Calc timeout value. This is pretty broken with high baud rates with HZ=100.
-	   This code would love a larger HZ and a >1 fifo size, but this is not
-	   a priority. The resulting value must be >HZ/2
-	 */
-	info->timeout = ((info->xmit_fifo_size*HZ*bits) / baud);
-	info->timeout += HZ/50+1;	/* Add .02 seconds of slop */
-
-	BAUDBG("timeout=%d/%ds, base:%d\n", (int)info->timeout, (int)HZ,
-	       (int)info->baud_base);
-
-	/* set the irda codec to the right rate */
-	if (info->is_irda)
-		irda_setup(info);
-
-	/* Load up the new values */
-	load_zsregs(info->zs_channel, info->curregs);
-
-	spin_unlock_irqrestore(&info->lock, flags);
-}
-
-static void rs_flush_chars(struct tty_struct *tty)
-{
-	struct mac_serial *info = (struct mac_serial *)tty->driver_data;
-	unsigned long flags;
-
-	if (serial_paranoia_check(info, tty->name, "rs_flush_chars"))
-		return;
-
-	spin_lock_irqsave(&info->lock, flags);
-	if (!(info->xmit_cnt <= 0 || tty->stopped || info->tx_stopped ||
-	      !info->xmit_buf))
-		/* Enable transmitter */
-		transmit_chars(info);
-	spin_unlock_irqrestore(&info->lock, flags);
-}
-
-static int rs_write(struct tty_struct * tty,
-		    const unsigned char *buf, int count)
-{
-	int	c, ret = 0;
-	struct mac_serial *info = (struct mac_serial *)tty->driver_data;
-	unsigned long flags;
-
-	if (serial_paranoia_check(info, tty->name, "rs_write"))
-		return 0;
-
-	if (!tty || !info->xmit_buf || !tmp_buf)
-		return 0;
-
-	while (1) {
-		spin_lock_irqsave(&info->lock, flags);
-		c = min_t(int, count, min(SERIAL_XMIT_SIZE - info->xmit_cnt - 1,
-					  SERIAL_XMIT_SIZE - info->xmit_head));
-		if (c <= 0) {
-			spin_unlock_irqrestore(&info->lock, 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;
-		spin_unlock_irqrestore(&info->lock, flags);
-		buf += c;
-		count -= c;
-		ret += c;
-	}
-	spin_lock_irqsave(&info->lock, flags);
-	if (info->xmit_cnt && !tty->stopped && !info->tx_stopped
-	    && !info->tx_active)
-		transmit_chars(info);
-	spin_unlock_irqrestore(&info->lock, flags);
-	return ret;
-}
-
-static int rs_write_room(struct tty_struct *tty)
-{
-	struct mac_serial *info = (struct mac_serial *)tty->driver_data;
-	int	ret;
-
-	if (serial_paranoia_check(info, tty->name, "rs_write_room"))
-		return 0;
-	ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
-	if (ret < 0)
-		ret = 0;
-	return ret;
-}
-
-static int rs_chars_in_buffer(struct tty_struct *tty)
-{
-	struct mac_serial *info = (struct mac_serial *)tty->driver_data;
-
-	if (serial_paranoia_check(info, tty->name, "rs_chars_in_buffer"))
-		return 0;
-	return info->xmit_cnt;
-}
-
-static void rs_flush_buffer(struct tty_struct *tty)
-{
-	struct mac_serial *info = (struct mac_serial *)tty->driver_data;
-	unsigned long flags;
-
-	if (serial_paranoia_check(info, tty->name, "rs_flush_buffer"))
-		return;
-	spin_lock_irqsave(&info->lock, flags);
-	info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
-	spin_unlock_irqrestore(&info->lock, flags);
-	tty_wakeup(tty);
-}
-
-/*
- * ------------------------------------------------------------
- * rs_throttle()
- * 
- * This routine is called by the upper-layer tty layer to signal that
- * incoming characters should be throttled.
- * ------------------------------------------------------------
- */
-static void rs_throttle(struct tty_struct * tty)
-{
-	struct mac_serial *info = (struct mac_serial *)tty->driver_data;
-	unsigned long flags;
-#ifdef SERIAL_DEBUG_THROTTLE
-	printk(KERN_DEBUG "throttle %ld....\n",tty->ldisc.chars_in_buffer(tty));
-#endif
-
-	if (serial_paranoia_check(info, tty->name, "rs_throttle"))
-		return;
-
-	if (I_IXOFF(tty)) {
-		spin_lock_irqsave(&info->lock, flags);
-		info->x_char = STOP_CHAR(tty);
-		if (!info->tx_active)
-			transmit_chars(info);
-		spin_unlock_irqrestore(&info->lock, flags);
-	}
-
-	if (C_CRTSCTS(tty)) {
-		/*
-		 * Here we want to turn off the RTS line.  On Macintoshes,
-		 * the external serial ports using a DIN-8 or DIN-9
-		 * connector only have the DTR line (which is usually
-		 * wired to both RTS and DTR on an external modem in
-		 * the cable).  RTS doesn't go out to the serial port
-		 * socket, it acts as an output enable for the transmit
-		 * data line.  So in this case we don't drop RTS.
-		 *
-		 * Macs with internal modems generally do have both RTS
-		 * and DTR wired to the modem, so in that case we do
-		 * drop RTS.
-		 */
-		if (info->is_internal_modem) {
-			spin_lock_irqsave(&info->lock, flags);
-			info->curregs[5] &= ~RTS;
-			info->pendregs[5] &= ~RTS;
-			write_zsreg(info->zs_channel, 5, info->curregs[5]);
-			spin_unlock_irqrestore(&info->lock, flags);
-		}
-	}
-	
-#ifdef CDTRCTS
-	if (tty->termios->c_cflag & CDTRCTS) {
-		spin_lock_irqsave(&info->lock, flags);
-		info->curregs[5] &= ~DTR;
-		info->pendregs[5] &= ~DTR;
-		write_zsreg(info->zs_channel, 5, info->curregs[5]);
-		spin_unlock_irqrestore(&info->lock, flags);
-	}
-#endif /* CDTRCTS */
-}
-
-static void rs_unthrottle(struct tty_struct * tty)
-{
-	struct mac_serial *info = (struct mac_serial *)tty->driver_data;
-	unsigned long flags;
-#ifdef SERIAL_DEBUG_THROTTLE
-	printk(KERN_DEBUG "unthrottle %s: %d....\n",
-			tty->ldisc.chars_in_buffer(tty));
-#endif
-
-	if (serial_paranoia_check(info, tty->name, "rs_unthrottle"))
-		return;
-
-	if (I_IXOFF(tty)) {
-		spin_lock_irqsave(&info->lock, flags);
-		if (info->x_char)
-			info->x_char = 0;
-		else {
-			info->x_char = START_CHAR(tty);
-			if (!info->tx_active)
-				transmit_chars(info);
-		}
-		spin_unlock_irqrestore(&info->lock, flags);
-	}
-
-	if (C_CRTSCTS(tty) && info->is_internal_modem) {
-		/* Assert RTS line */
-		spin_lock_irqsave(&info->lock, flags);
-		info->curregs[5] |= RTS;
-		info->pendregs[5] |= RTS;
-		write_zsreg(info->zs_channel, 5, info->curregs[5]);
-		spin_unlock_irqrestore(&info->lock, flags);
-	}
-
-#ifdef CDTRCTS
-	if (tty->termios->c_cflag & CDTRCTS) {
-		/* Assert DTR line */
-		spin_lock_irqsave(&info->lock, flags);
-		info->curregs[5] |= DTR;
-		info->pendregs[5] |= DTR;
-		write_zsreg(info->zs_channel, 5, info->curregs[5]);
-		spin_unlock_irqrestore(&info->lock, flags);
-	}
-#endif
-}
-
-/*
- * ------------------------------------------------------------
- * rs_ioctl() and friends
- * ------------------------------------------------------------
- */
-
-static int get_serial_info(struct mac_serial * info,
-			   struct serial_struct __user * retinfo)
-{
-	struct serial_struct tmp;
-  
-	if (!retinfo)
-		return -EFAULT;
-	memset(&tmp, 0, sizeof(tmp));
-	tmp.type = info->type;
-	tmp.line = info->line;
-	tmp.port = info->port;
-	tmp.irq = info->irq;
-	tmp.flags = info->flags;
-	tmp.baud_base = info->baud_base;
-	tmp.close_delay = info->close_delay;
-	tmp.closing_wait = info->closing_wait;
-	tmp.custom_divisor = info->custom_divisor;
-	if (copy_to_user(retinfo,&tmp,sizeof(*retinfo)))
-		return -EFAULT;
-	return 0;
-}
-
-static int set_serial_info(struct mac_serial * info,
-			   struct serial_struct __user * new_info)
-{
-	struct serial_struct new_serial;
-	struct mac_serial old_info;
-	int 			retval = 0;
-
-	if (copy_from_user(&new_serial,new_info,sizeof(new_serial)))
-		return -EFAULT;
-	old_info = *info;
-
-	if (!capable(CAP_SYS_ADMIN)) {
-		if ((new_serial.baud_base != info->baud_base) ||
-		    (new_serial.type != info->type) ||
-		    (new_serial.close_delay != info->close_delay) ||
-		    ((new_serial.flags & ~ZILOG_USR_MASK) !=
-		     (info->flags & ~ZILOG_USR_MASK)))
-			return -EPERM;
-		info->flags = ((info->flags & ~ZILOG_USR_MASK) |
-			       (new_serial.flags & ZILOG_USR_MASK));
-		info->custom_divisor = new_serial.custom_divisor;
-		goto check_and_exit;
-	}
-
-	if (info->count > 1)
-		return -EBUSY;
-
-	/*
-	 * OK, past this point, all the error checking has been done.
-	 * At this point, we start making changes.....
-	 */
-
-	info->baud_base = new_serial.baud_base;
-	info->flags = ((info->flags & ~ZILOG_FLAGS) |
-			(new_serial.flags & ZILOG_FLAGS));
-	info->type = new_serial.type;
-	info->close_delay = new_serial.close_delay;
-	info->closing_wait = new_serial.closing_wait;
-
-check_and_exit:
-	if (info->flags & ZILOG_INITIALIZED)
-		retval = setup_scc(info);
-	return retval;
-}
-
-/*
- * get_lsr_info - get line status register info
- *
- * Purpose: Let user call ioctl() to get info when the UART physically
- * 	    is emptied.  On bus types like RS485, the transmitter must
- * 	    release the bus after transmitting. This must be done when
- * 	    the transmit shift register is empty, not be done when the
- * 	    transmit holding register is empty.  This functionality
- * 	    allows an RS485 driver to be written in user space. 
- */
-static int get_lsr_info(struct mac_serial * info, unsigned int *value)
-{
-	unsigned char status;
-	unsigned long flags;
-
-	spin_lock_irqsave(&info->lock, flags);
-	status = read_zsreg(info->zs_channel, 0);
-	spin_unlock_irqrestore(&info->lock, flags);
-	status = (status & Tx_BUF_EMP)? TIOCSER_TEMT: 0;
-	return put_user(status,value);
-}
-
-static int rs_tiocmget(struct tty_struct *tty, struct file *file)
-{
-	struct mac_serial * info = (struct mac_serial *)tty->driver_data;
-	unsigned char control, status;
-	unsigned long flags;
-
-#ifdef CONFIG_KGDB
-	if (info->kgdb_channel)
-		return -ENODEV;
-#endif
-	if (serial_paranoia_check(info, tty->name, __FUNCTION__))
-		return -ENODEV;
-
-	if (tty->flags & (1 << TTY_IO_ERROR))
-		return -EIO;
-
-	spin_lock_irqsave(&info->lock, flags);
-	control = info->curregs[5];
-	status = read_zsreg(info->zs_channel, 0);
-	spin_unlock_irqrestore(&info->lock, flags);
-	return    ((control & RTS) ? TIOCM_RTS: 0)
-		| ((control & DTR) ? TIOCM_DTR: 0)
-		| ((status  & DCD) ? TIOCM_CAR: 0)
-		| ((status  & CTS) ? 0: TIOCM_CTS);
-}
-
-static int rs_tiocmset(struct tty_struct *tty, struct file *file,
-		       unsigned int set, unsigned int clear)
-{
-	struct mac_serial * info = (struct mac_serial *)tty->driver_data;
-	unsigned int arg, bits;
-	unsigned long flags;
-
-#ifdef CONFIG_KGDB
-	if (info->kgdb_channel)
-		return -ENODEV;
-#endif
-	if (serial_paranoia_check(info, tty->name, __FUNCTION__))
-		return -ENODEV;
-
-	if (tty->flags & (1 << TTY_IO_ERROR))
-		return -EIO;
-
-	spin_lock_irqsave(&info->lock, flags);
-	if (set & TIOCM_RTS)
-		info->curregs[5] |= RTS;
-	if (set & TIOCM_DTR)
-		info->curregs[5] |= DTR;
-	if (clear & TIOCM_RTS)
-		info->curregs[5] &= ~RTS;
-	if (clear & TIOCM_DTR)
-		info->curregs[5] &= ~DTR;
-
-	info->pendregs[5] = info->curregs[5];
-	write_zsreg(info->zs_channel, 5, info->curregs[5]);
-	spin_unlock_irqrestore(&info->lock, flags);
-	return 0;
-}
-
-/*
- * rs_break - turn transmit break condition on/off
- */
-static void rs_break(struct tty_struct *tty, int break_state)
-{
-	struct mac_serial *info = (struct mac_serial *) tty->driver_data;
-	unsigned long flags;
-
-	if (serial_paranoia_check(info, tty->name, "rs_break"))
-		return;
-
-	spin_lock_irqsave(&info->lock, flags);
-	if (break_state == -1)
-		info->curregs[5] |= SND_BRK;
-	else
-		info->curregs[5] &= ~SND_BRK;
-	write_zsreg(info->zs_channel, 5, info->curregs[5]);
-	spin_unlock_irqrestore(&info->lock, flags);
-}
-
-static int rs_ioctl(struct tty_struct *tty, struct file * file,
-		    unsigned int cmd, unsigned long arg)
-{
-	struct mac_serial * info = (struct mac_serial *)tty->driver_data;
-
-#ifdef CONFIG_KGDB
-	if (info->kgdb_channel)
-		return -ENODEV;
-#endif
-	if (serial_paranoia_check(info, tty->name, "rs_ioctl"))
-		return -ENODEV;
-
-	if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) &&
-	    (cmd != TIOCSERCONFIG) && (cmd != TIOCSERGSTRUCT)) {
-		if (tty->flags & (1 << TTY_IO_ERROR))
-		    return -EIO;
-	}
-
-	switch (cmd) {
-		case TIOCGSERIAL:
-			return get_serial_info(info,
-					(struct serial_struct __user *) arg);
-		case TIOCSSERIAL:
-			return set_serial_info(info,
-					(struct serial_struct __user *) arg);
-		case TIOCSERGETLSR: /* Get line status register */
-			return get_lsr_info(info, (unsigned int *) arg);
-
-		case TIOCSERGSTRUCT:
-			if (copy_to_user((struct mac_serial __user *) arg,
-					 info, sizeof(struct mac_serial)))
-				return -EFAULT;
-			return 0;
-
-		default:
-			return -ENOIOCTLCMD;
-		}
-	return 0;
-}
-
-static void rs_set_termios(struct tty_struct *tty, struct termios *old_termios)
-{
-	struct mac_serial *info = (struct mac_serial *)tty->driver_data;
-	int was_stopped;
-
-	if (tty->termios->c_cflag == old_termios->c_cflag)
-		return;
-	was_stopped = info->tx_stopped;
-
-	change_speed(info, old_termios);
-
-	if (was_stopped && !info->tx_stopped) {
-		tty->hw_stopped = 0;
-		rs_start(tty);
-	}
-}
-
-/*
- * ------------------------------------------------------------
- * rs_close()
- * 
- * This routine is called when the serial port gets closed.
- * Wait for the last remaining data to be sent.
- * ------------------------------------------------------------
- */
-static void rs_close(struct tty_struct *tty, struct file * filp)
-{
-	struct mac_serial * info = (struct mac_serial *)tty->driver_data;
-	unsigned long flags;
-
-	if (!info || serial_paranoia_check(info, tty->name, "rs_close"))
-		return;
-
-	spin_lock_irqsave(&info->lock, flags);
-
-	if (tty_hung_up_p(filp)) {
-		spin_unlock_irqrestore(&info->lock, flags);
-		return;
-	}
-
-	OPNDBG("rs_close ttyS%d, count = %d\n", info->line, info->count);
-	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(KERN_ERR "rs_close: bad serial port count; tty->count "
-				"is 1, info->count is %d\n", info->count);
-		info->count = 1;
-	}
-	if (--info->count < 0) {
-		printk(KERN_ERR "rs_close: bad serial port count for "
-				"ttyS%d: %d\n", info->line, info->count);
-		info->count = 0;
-	}
-	if (info->count) {
-		spin_unlock_irqrestore(&info->lock, flags);
-		return;
-	}
-	info->flags |= ZILOG_CLOSING;
-	/*
-	 * Now we wait for the transmit buffer to clear; and we notify 
-	 * the line discipline to only process XON/XOFF characters.
-	 */
-	OPNDBG("waiting end of Tx... (timeout:%d)\n", info->closing_wait);
-	tty->closing = 1;
-	if (info->closing_wait != ZILOG_CLOSING_WAIT_NONE) {
-		spin_unlock_irqrestore(&info->lock, flags);
-		tty_wait_until_sent(tty, info->closing_wait);
-		spin_lock_irqsave(&info->lock, flags);
-	}
-
-	/*
-	 * At this point we stop accepting input.  To do this, we
-	 * disable the receiver and receive interrupts.
-	 */
-	info->curregs[3] &= ~RxENABLE;
-	info->pendregs[3] = info->curregs[3];
-	write_zsreg(info->zs_channel, 3, info->curregs[3]);
-	info->curregs[1] &= ~(0x18);	/* disable any rx ints */
-	info->pendregs[1] = info->curregs[1];
-	write_zsreg(info->zs_channel, 1, info->curregs[1]);
-	ZS_CLEARFIFO(info->zs_channel);
-	if (info->flags & ZILOG_INITIALIZED) {
-		/*
-		 * Before we drop DTR, make sure the SCC transmitter
-		 * has completely drained.
-		 */
-		OPNDBG("waiting end of Rx...\n");
-		spin_unlock_irqrestore(&info->lock, flags);
-		rs_wait_until_sent(tty, info->timeout);
-		spin_lock_irqsave(&info->lock, flags);
-	}
-
-	shutdown(info);
-	/* restore flags now since shutdown() will have disabled this port's
-	   specific irqs */
-	spin_unlock_irqrestore(&info->lock, flags);
-
-	if (tty->driver->flush_buffer)
-		tty->driver->flush_buffer(tty);
-	tty_ldisc_flush(tty);
-	tty->closing = 0;
-	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 &= ~(ZILOG_NORMAL_ACTIVE|ZILOG_CLOSING);
-	wake_up_interruptible(&info->close_wait);
-}
-
-/*
- * rs_wait_until_sent() --- wait until the transmitter is empty
- */
-static void rs_wait_until_sent(struct tty_struct *tty, int timeout)
-{
-	struct mac_serial *info = (struct mac_serial *) tty->driver_data;
-	unsigned long orig_jiffies, char_time;
-
-	if (serial_paranoia_check(info, tty->name, "rs_wait_until_sent"))
-		return;
-
-/*	printk("rs_wait_until_sent, timeout:%d, tty_stopped:%d, tx_stopped:%d\n",
-			timeout, tty->stopped, info->tx_stopped);
-*/
-	orig_jiffies = jiffies;
-	/*
-	 * Set the check interval to be 1/5 of the estimated time to
-	 * send a single character, and make it at least 1.  The check
-	 * interval should also be less than the timeout.
-	 */
-	if (info->timeout <= HZ/50) {
-		printk(KERN_INFO "macserial: invalid info->timeout=%d\n",
-				    info->timeout);
-		info->timeout = HZ/50+1;
-	}
-
-	char_time = (info->timeout - HZ/50) / info->xmit_fifo_size;
-	char_time = char_time / 5;
-	if (char_time > HZ) {
-		printk(KERN_WARNING "macserial: char_time %ld >HZ !!!\n",
-				    char_time);
-		char_time = 1;
-	} else if (char_time == 0)
-		char_time = 1;
-	if (timeout)
-		char_time = min_t(unsigned long, char_time, timeout);
-	while ((read_zsreg(info->zs_channel, 1) & ALL_SNT) == 0) {
-		msleep_interruptible(jiffies_to_msecs(char_time));
-		if (signal_pending(current))
-			break;
-		if (timeout && time_after(jiffies, orig_jiffies + timeout))
-			break;
-	}
-	current->state = TASK_RUNNING;
-}
-
-/*
- * rs_hangup() --- called by tty_hangup() when a hangup is signaled.
- */
-static void rs_hangup(struct tty_struct *tty)
-{
-	struct mac_serial * info = (struct mac_serial *)tty->driver_data;
-
-	if (serial_paranoia_check(info, tty->name, "rs_hangup"))
-		return;
-
-	rs_flush_buffer(tty);
-	shutdown(info);
-	info->event = 0;
-	info->count = 0;
-	info->flags &= ~ZILOG_NORMAL_ACTIVE;
-	info->tty = 0;
-	wake_up_interruptible(&info->open_wait);
-}
-
-/*
- * ------------------------------------------------------------
- * rs_open() and friends
- * ------------------------------------------------------------
- */
-static int block_til_ready(struct tty_struct *tty, struct file * filp,
-			   struct mac_serial *info)
-{
-	DECLARE_WAITQUEUE(wait,current);
-	int		retval;
-	int		do_clocal = 0;
-
-	/*
-	 * If the device is in the middle of being closed, then block
-	 * until it's done, and then try again.
-	 */
-	if (info->flags & ZILOG_CLOSING) {
-		interruptible_sleep_on(&info->close_wait);
-		return -EAGAIN;
-	}
-
-	/*
-	 * If non-blocking mode is set, or the port is not enabled,
-	 * then make the check up front and then exit.
-	 */
-	if ((filp->f_flags & O_NONBLOCK) ||
-	    (tty->flags & (1 << TTY_IO_ERROR))) {
-		info->flags |= ZILOG_NORMAL_ACTIVE;
-		return 0;
-	}
-
-	if (tty->termios->c_cflag & CLOCAL)
-		do_clocal = 1;
-
-	/*
-	 * Block waiting for the carrier detect and the line to become
-	 * free (i.e., not in use by the callout).  While we are in
-	 * this loop, 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(&info->open_wait, &wait);
-	OPNDBG("block_til_ready before block: ttyS%d, count = %d\n",
-	       info->line, info->count);
-	spin_lock_irq(&info->lock);
-	if (!tty_hung_up_p(filp)) 
-		info->count--;
-	spin_unlock_irq(&info->lock);
-	info->blocked_open++;
-	while (1) {
-		spin_lock_irq(&info->lock);
-		if ((tty->termios->c_cflag & CBAUD) &&
-		    !info->is_irda)
-			zs_rtsdtr(info, 1);
-		spin_unlock_irq(&info->lock);
-		set_current_state(TASK_INTERRUPTIBLE);
-		if (tty_hung_up_p(filp) ||
-		    !(info->flags & ZILOG_INITIALIZED)) {
-			retval = -EAGAIN;
-			break;
-		}
-		if (!(info->flags & ZILOG_CLOSING) &&
-		    (do_clocal || (read_zsreg(info->zs_channel, 0) & DCD)))
-			break;
-		if (signal_pending(current)) {
-			retval = -ERESTARTSYS;
-			break;
-		}
-		OPNDBG("block_til_ready blocking: ttyS%d, count = %d\n",
-		       info->line, info->count);
-		schedule();
-	}
-	current->state = TASK_RUNNING;
-	remove_wait_queue(&info->open_wait, &wait);
-	if (!tty_hung_up_p(filp))
-		info->count++;
-	info->blocked_open--;
-	OPNDBG("block_til_ready after blocking: ttyS%d, count = %d\n",
-	       info->line, info->count);
-	if (retval)
-		return retval;
-	info->flags |= ZILOG_NORMAL_ACTIVE;
-	return 0;
-}
-
-/*
- * This routine is called whenever a serial port is opened.  It
- * enables interrupts for a serial port, linking in its ZILOG structure into
- * the IRQ chain.   It also performs the serial-specific
- * initialization for the tty structure.
- */
-static int rs_open(struct tty_struct *tty, struct file * filp)
-{
-	struct mac_serial	*info;
-	int 			retval, line;
-	unsigned long		page;
-
-	line = tty->index;
-	if ((line < 0) || (line >= zs_channels_found)) {
-		return -ENODEV;
-	}
-	info = zs_soft + line;
-
-#ifdef CONFIG_KGDB
-	if (info->kgdb_channel) {
-		return -ENODEV;
-	}
-#endif
-	if (serial_paranoia_check(info, tty->name, "rs_open"))
-		return -ENODEV;
-	OPNDBG("rs_open %s, count = %d, tty=%p\n", tty->name,
-	       info->count, tty);
-
-	info->count++;
-	tty->driver_data = info;
-	info->tty = tty;
-
-	if (!tmp_buf) {
-		page = get_zeroed_page(GFP_KERNEL);
-		if (!page)
-			return -ENOMEM;
-		if (tmp_buf)
-			free_page(page);
-		else
-			tmp_buf = (unsigned char *) page;
-	}
-
-	/*
-	 * If the port is the middle of closing, bail out now
-	 */
-	if (tty_hung_up_p(filp) ||
-	    (info->flags & ZILOG_CLOSING)) {
-		if (info->flags & ZILOG_CLOSING)
-			interruptible_sleep_on(&info->close_wait);
-		return -EAGAIN;
-	}
-
-	/*
-	 * Start up serial port
-	 */
-
-	retval = startup(info);
-	if (retval)
-		return retval;
-
-	retval = block_til_ready(tty, filp, info);
-	if (retval) {
-		OPNDBG("rs_open returning after block_til_ready with %d\n",
-			retval);
-		return retval;
-	}
-
-#ifdef CONFIG_SERIAL_CONSOLE
-	if (sercons.cflag && sercons.index == line) {
-		tty->termios->c_cflag = sercons.cflag;
-		sercons.cflag = 0;
-		change_speed(info, 0);
-	}
-#endif
-
-	OPNDBG("rs_open %s successful...\n", tty->name);
-	return 0;
-}
-
-/* Finally, routines used to initialize the serial driver. */
-
-static void show_serial_version(void)
-{
-	printk(KERN_INFO "PowerMac Z8530 serial driver version " MACSERIAL_VERSION "\n");
-}
-
-/*
- * Initialize one channel, both the mac_serial and mac_zschannel
- * structs.  We use the dev_node field of the mac_serial struct.
- */
-static int
-chan_init(struct mac_serial *zss, struct mac_zschannel *zs_chan,
-	  struct mac_zschannel *zs_chan_a)
-{
-	struct device_node *ch = zss->dev_node;
-	char *conn;
-	int len;
-	struct slot_names_prop {
-		int	count;
-		char	name[1];
-	} *slots;
-
-	zss->irq = ch->intrs[0].line;
-	zss->has_dma = 0;
-#if !defined(CONFIG_KGDB) && defined(SUPPORT_SERIAL_DMA)
-	if (ch->n_addrs >= 3 && ch->n_intrs == 3)
-		zss->has_dma = 1;
-#endif
-	zss->dma_initted = 0;
-
-	zs_chan->control = (volatile unsigned char *)
-		ioremap(ch->addrs[0].address, 0x1000);
-	zs_chan->data = zs_chan->control + 0x10;
-	spin_lock_init(&zs_chan->lock);
-	zs_chan->parent = zss;
-	zss->zs_channel = zs_chan;
-	zss->zs_chan_a = zs_chan_a;
-
-	/* setup misc varariables */
-	zss->kgdb_channel = 0;
-
-	/* For now, we assume you either have a slot-names property
-	 * with "Modem" in it, or your channel is compatible with
-	 * "cobalt". Might need additional fixups
-	 */
-	zss->is_internal_modem = device_is_compatible(ch, "cobalt");
-	conn = get_property(ch, "AAPL,connector", &len);
-	zss->is_irda = conn && (strcmp(conn, "infrared") == 0);
-	zss->port_type = PMAC_SCC_ASYNC;
-	/* 1999 Powerbook G3 has slot-names property instead */
-	slots = (struct slot_names_prop *)get_property(ch, "slot-names", &len);
-	if (slots && slots->count > 0) {
-		if (strcmp(slots->name, "IrDA") == 0)
-			zss->is_irda = 1;
-		else if (strcmp(slots->name, "Modem") == 0)
-			zss->is_internal_modem = 1;
-	}
-	if (zss->is_irda)
-		zss->port_type = PMAC_SCC_IRDA;
-	if (zss->is_internal_modem) {
-		struct device_node* i2c_modem = find_devices("i2c-modem");
-		if (i2c_modem) {
-			char* mid = get_property(i2c_modem, "modem-id", NULL);
-			if (mid) switch(*mid) {
-			case 0x04 :
-			case 0x05 :
-			case 0x07 :
-			case 0x08 :
-			case 0x0b :
-			case 0x0c :
-				zss->port_type = PMAC_SCC_I2S1;
-			}
-			printk(KERN_INFO "macserial: i2c-modem detected, id: %d\n",
-				mid ? (*mid) : 0);
-		} else {
-			printk(KERN_INFO "macserial: serial modem detected\n");
-		}
-	}
-
-	while (zss->has_dma) {
-		zss->dma_priv = NULL;
-		/* it seems that the last two addresses are the
-		   DMA controllers */
-		zss->tx_dma = (volatile struct dbdma_regs *)
-			ioremap(ch->addrs[ch->n_addrs - 2].address, 0x100);
-		zss->rx = (volatile struct mac_dma *)
-			ioremap(ch->addrs[ch->n_addrs - 1].address, 0x100);
-		zss->tx_dma_irq = ch->intrs[1].line;
-		zss->rx_dma_irq = ch->intrs[2].line;
-		spin_lock_init(&zss->rx_dma_lock);
-		break;
-	}
-
-	init_timer(&zss->powerup_timer);
-	zss->powerup_timer.function = powerup_done;
-	zss->powerup_timer.data = (unsigned long) zss;
-	return 0;
-}
-
-/*
- * /proc fs routines. TODO: Add status lines & error stats
- */
-static inline int
-line_info(char *buf, struct mac_serial *info)
-{
-	int		ret=0;
-	unsigned char* connector;
-	int lenp;
-
-	ret += sprintf(buf, "%d: port:0x%X irq:%d", info->line, info->port, info->irq);
-
-	connector = get_property(info->dev_node, "AAPL,connector", &lenp);
-	if (connector)
-		ret+=sprintf(buf+ret," con:%s ", connector);
-	if (info->is_internal_modem) {
-		if (!connector)
-			ret+=sprintf(buf+ret," con:");
-		ret+=sprintf(buf+ret,"%s", " (internal modem)");
-	}
-	if (info->is_irda) {
-		if (!connector)
-			ret+=sprintf(buf+ret," con:");
-		ret+=sprintf(buf+ret,"%s", " (IrDA)");
-	}
-	ret+=sprintf(buf+ret,"\n");
-
-	return ret;
-}
-
-int macserial_read_proc(char *page, char **start, off_t off, int count,
-		 int *eof, void *data)
-{
-	int l, len = 0;
-	off_t	begin = 0;
-	struct mac_serial *info;
-
-	len += sprintf(page, "serinfo:1.0 driver:" MACSERIAL_VERSION "\n");
-	for (info = zs_chain; info && len < 4000; info = info->zs_next) {
-		l = line_info(page + len, info);
-		len += l;
-		if (len+begin > off+count)
-			goto done;
-		if (len+begin < off) {
-			begin += len;
-			len = 0;
-		}
-	}
-	*eof = 1;
-done:
-	if (off >= len+begin)
-		return 0;
-	*start = page + (off-begin);
-	return ((count < begin+len-off) ? count : begin+len-off);
-}
-
-/* Ask the PROM how many Z8530s we have and initialize their zs_channels */
-static void
-probe_sccs(void)
-{
-	struct device_node *dev, *ch;
-	struct mac_serial **pp;
-	int n, chip, nchan;
-	struct mac_zschannel *zs_chan;
-	int chan_a_index;
-
-	n = 0;
-	pp = &zs_chain;
-	zs_chan = zs_channels;
-	for (dev = find_devices("escc"); dev != 0; dev = dev->next) {
-		nchan = 0;
-		chip = n;
-		if (n >= NUM_CHANNELS) {
-			printk(KERN_WARNING "Sorry, can't use %s: no more "
-					    "channels\n", dev->full_name);
-			continue;
-		}
-		chan_a_index = 0;
-		for (ch = dev->child; ch != 0; ch = ch->sibling) {
-			if (nchan >= 2) {
-				printk(KERN_WARNING "SCC: Only 2 channels per "
-					"chip are supported\n");
-				break;
-			}
-			if (ch->n_addrs < 1 || (ch ->n_intrs < 1)) {
-				printk("Can't use %s: %d addrs %d intrs\n",
-				      ch->full_name, ch->n_addrs, ch->n_intrs);
-				continue;
-			}
-
-			/* The channel with the higher address
-			   will be the A side. */
-			if (nchan > 0 &&
-			    ch->addrs[0].address
-			    > zs_soft[n-1].dev_node->addrs[0].address)
-				chan_a_index = 1;
-
-			/* minimal initialization for now */
-			zs_soft[n].dev_node = ch;
-			*pp = &zs_soft[n];
-			pp = &zs_soft[n].zs_next;
-			++nchan;
-			++n;
-		}
-		if (nchan == 0)
-			continue;
-
-		/* set up A side */
-		if (chan_init(&zs_soft[chip + chan_a_index], zs_chan, zs_chan))
-			continue;
-		++zs_chan;
-
-		/* set up B side, if it exists */
-		if (nchan > 1)
-			if (chan_init(&zs_soft[chip + 1 - chan_a_index],
-				  zs_chan, zs_chan - 1))
-				continue;
-		++zs_chan;
-	}
-	*pp = 0;
-
-	zs_channels_found = n;
-#ifdef CONFIG_PMAC_PBOOK
-	if (n)
-		pmu_register_sleep_notifier(&serial_sleep_notifier);
-#endif /* CONFIG_PMAC_PBOOK */
-}
-
-static struct tty_operations serial_ops = {
-	.open = rs_open,
-	.close = rs_close,
-	.write = rs_write,
-	.flush_chars = rs_flush_chars,
-	.write_room = rs_write_room,
-	.chars_in_buffer = rs_chars_in_buffer,
-	.flush_buffer = rs_flush_buffer,
-	.ioctl = rs_ioctl,
-	.throttle = rs_throttle,
-	.unthrottle = rs_unthrottle,
-	.set_termios = rs_set_termios,
-	.stop = rs_stop,
-	.start = rs_start,
-	.hangup = rs_hangup,
-	.break_ctl = rs_break,
-	.wait_until_sent = rs_wait_until_sent,
-	.read_proc = macserial_read_proc,
-	.tiocmget = rs_tiocmget,
-	.tiocmset = rs_tiocmset,
-};
-
-static int macserial_init(void)
-{
-	int channel, i;
-	struct mac_serial *info;
-
-	/* Find out how many Z8530 SCCs we have */
-	if (zs_chain == 0)
-		probe_sccs();
-
-	serial_driver = alloc_tty_driver(zs_channels_found);
-	if (!serial_driver)
-		return -ENOMEM;
-
-	/* XXX assume it's a powerbook if we have a via-pmu
-	 * 
-	 * This is OK for core99 machines as well.
-	 */
-	is_powerbook = find_devices("via-pmu") != 0;
-
-	/* Register the interrupt handler for each one
-	 * We also request the OF resources here as probe_sccs()
-	 * might be called too early for that
-	 */
-	for (i = 0; i < zs_channels_found; ++i) {
-		struct device_node* ch = zs_soft[i].dev_node;
-		if (!request_OF_resource(ch, 0, NULL)) {
-			printk(KERN_ERR "macserial: can't request IO resource !\n");
-			put_tty_driver(serial_driver);
-			return -ENODEV;
-		}
-		if (zs_soft[i].has_dma) {
-			if (!request_OF_resource(ch, ch->n_addrs - 2, " (tx dma)")) {
-				printk(KERN_ERR "macserial: can't request TX DMA resource !\n");
-				zs_soft[i].has_dma = 0;
-				goto no_dma;
-			}
-			if (!request_OF_resource(ch, ch->n_addrs - 1, " (rx dma)")) {
-				release_OF_resource(ch, ch->n_addrs - 2);
-				printk(KERN_ERR "macserial: can't request RX DMA resource !\n");
-				zs_soft[i].has_dma = 0;
-				goto no_dma;
-			}
-			if (request_irq(zs_soft[i].tx_dma_irq, rs_txdma_irq, 0,
-					"SCC-txdma", &zs_soft[i]))
-				printk(KERN_ERR "macserial: can't get irq %d\n",
-				       zs_soft[i].tx_dma_irq);
-			disable_irq(zs_soft[i].tx_dma_irq);
-			if (request_irq(zs_soft[i].rx_dma_irq, rs_rxdma_irq, 0,
-					"SCC-rxdma", &zs_soft[i]))
-				printk(KERN_ERR "macserial: can't get irq %d\n",
-				       zs_soft[i].rx_dma_irq);
-			disable_irq(zs_soft[i].rx_dma_irq);
-		}
-no_dma:		
-		if (request_irq(zs_soft[i].irq, rs_interrupt, 0,
-				"SCC", &zs_soft[i]))
-			printk(KERN_ERR "macserial: can't get irq %d\n",
-			       zs_soft[i].irq);
-		disable_irq(zs_soft[i].irq);
-	}
-
-	show_serial_version();
-
-	/* Initialize the tty_driver structure */
-	/* Not all of this is exactly right for us. */
-
-	serial_driver->owner = THIS_MODULE;
-	serial_driver->driver_name = "macserial";
-	serial_driver->devfs_name = "tts/";
-	serial_driver->name = "ttyS";
-	serial_driver->major = TTY_MAJOR;
-	serial_driver->minor_start = 64;
-	serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
-	serial_driver->subtype = SERIAL_TYPE_NORMAL;
-	serial_driver->init_termios = tty_std_termios;
-	serial_driver->init_termios.c_cflag =
-		B38400 | CS8 | CREAD | HUPCL | CLOCAL;
-	serial_driver->flags = TTY_DRIVER_REAL_RAW;
-	tty_set_operations(serial_driver, &serial_ops);
-
-	if (tty_register_driver(serial_driver))
-		printk(KERN_ERR "Error: couldn't register serial driver\n");
-
-	for (channel = 0; channel < zs_channels_found; ++channel) {
-#ifdef CONFIG_KGDB
-		if (zs_soft[channel].kgdb_channel) {
-			kgdb_interruptible(1);
-			continue;
-		}
-#endif
-		zs_soft[channel].clk_divisor = 16;
-/* -- we are not sure the SCC is powered ON at this point
- 		zs_soft[channel].zs_baud = get_zsbaud(&zs_soft[channel]);
-*/
-		zs_soft[channel].zs_baud = 38400;
-
-		/* If console serial line, then enable interrupts. */
-		if (zs_soft[channel].is_cons) {
-			printk(KERN_INFO "macserial: console line, enabling "
-					"interrupt %d\n", zs_soft[channel].irq);
-			panic("macserial: console not supported yet !");
-			write_zsreg(zs_soft[channel].zs_channel, R1,
-				    (EXT_INT_ENAB | INT_ALL_Rx | TxINT_ENAB));
-			write_zsreg(zs_soft[channel].zs_channel, R9,
-				    (NV | MIE));
-		}
-	}
-
-	for (info = zs_chain, i = 0; info; info = info->zs_next, i++)
-	{
-		unsigned char* connector;
-		int lenp;
-
-#ifdef CONFIG_KGDB
-		if (info->kgdb_channel) {
-			continue;
-		}
-#endif
-		info->magic = SERIAL_MAGIC;
-		info->port = (int) info->zs_channel->control;
-		info->line = i;
-		info->tty = 0;
-		info->custom_divisor = 16;
-		info->timeout = 0;
-		info->close_delay = 50;
-		info->closing_wait = 3000;
-		info->x_char = 0;
-		info->event = 0;
-		info->count = 0;
-		info->blocked_open = 0;
-		INIT_WORK(&info->tqueue, do_softint, info);
-		spin_lock_init(&info->lock);
-		init_waitqueue_head(&info->open_wait);
-		init_waitqueue_head(&info->close_wait);
-		info->timeout = HZ;
-		printk(KERN_INFO "tty%02d at 0x%08x (irq = %d)", info->line, 
-			info->port, info->irq);
-		printk(" is a Z8530 ESCC");
-		connector = get_property(info->dev_node, "AAPL,connector", &lenp);
-		if (connector)
-			printk(", port = %s", connector);
-		if (info->is_internal_modem)
-			printk(" (internal modem)");
-		if (info->is_irda)
-			printk(" (IrDA)");
-		printk("\n");
- 	}
-	tmp_buf = 0;
-
-	return 0;
-}
-
-void macserial_cleanup(void)
-{
-	int i;
-	unsigned long flags;
-	struct mac_serial *info;
-
-	for (info = zs_chain, i = 0; info; info = info->zs_next, i++)
-		set_scc_power(info, 0);
-	spin_lock_irqsave(&info->lock, flags);
-	for (i = 0; i < zs_channels_found; ++i) {
-		free_irq(zs_soft[i].irq, &zs_soft[i]);
-		if (zs_soft[i].has_dma) {
-			free_irq(zs_soft[i].tx_dma_irq, &zs_soft[i]);
-			free_irq(zs_soft[i].rx_dma_irq, &zs_soft[i]);
-		}
-		release_OF_resource(zs_soft[i].dev_node, 0);
-		if (zs_soft[i].has_dma) {
-			struct device_node* ch = zs_soft[i].dev_node;
-			release_OF_resource(ch, ch->n_addrs - 2);
-			release_OF_resource(ch, ch->n_addrs - 1);
-		}
-	}
-	spin_unlock_irqrestore(&info->lock, flags);
-	tty_unregister_driver(serial_driver);
-	put_tty_driver(serial_driver);
-
-	if (tmp_buf) {
-		free_page((unsigned long) tmp_buf);
-		tmp_buf = 0;
-	}
-
-#ifdef CONFIG_PMAC_PBOOK
-	if (zs_channels_found)
-		pmu_unregister_sleep_notifier(&serial_sleep_notifier);
-#endif /* CONFIG_PMAC_PBOOK */
-}
-
-module_init(macserial_init);
-module_exit(macserial_cleanup);
-MODULE_LICENSE("GPL");
-
-#if 0
-/*
- * register_serial and unregister_serial allows for serial ports to be
- * configured at run-time, to support PCMCIA modems.
- */
-/* PowerMac: Unused at this time, just here to make things link. */
-int register_serial(struct serial_struct *req)
-{
-	return -1;
-}
-
-void unregister_serial(int line)
-{
-	return;
-}
-#endif
-
-/*
- * ------------------------------------------------------------
- * Serial console driver
- * ------------------------------------------------------------
- */
-#ifdef CONFIG_SERIAL_CONSOLE
-
-/*
- *	Print a string to the serial port trying not to disturb
- *	any possible real use of the port...
- */
-static void serial_console_write(struct console *co, const char *s,
-				 unsigned count)
-{
-	struct mac_serial *info = zs_soft + co->index;
-	int i;
-
-	/* Turn of interrupts and enable the transmitter. */
-	write_zsreg(info->zs_channel, R1, info->curregs[1] & ~TxINT_ENAB);
-	write_zsreg(info->zs_channel, R5, info->curregs[5] | TxENAB | RTS | DTR);
-
-	for (i=0; i<count; i++) {
-		/* Wait for the transmit buffer to empty. */
-		while ((read_zsreg(info->zs_channel, 0) & Tx_BUF_EMP) == 0) {
-			eieio();
-		}
-
-		write_zsdata(info->zs_channel, s[i]);
-		if (s[i] == 10) {
-			while ((read_zsreg(info->zs_channel, 0) & Tx_BUF_EMP)
-                                == 0)
-				eieio();
-
-			write_zsdata(info->zs_channel, 13);
-		}
-	}
-
-	/* Restore the values in the registers. */
-	write_zsreg(info->zs_channel, R1, info->curregs[1]);
-	/* Don't disable the transmitter. */
-}
-
-static struct tty_driver *serial_driver;
-
-static struct tty_driver *serial_console_device(struct console *c, int *index)
-{
-	*index = c->index;
-	return serial_driver;
-}
-
-/*
- *	Setup initial baud/bits/parity. We do two things here:
- *	- construct a cflag setting for the first rs_open()
- *	- initialize the serial port
- *	Return non-zero if we didn't find a serial port.
- */
-static int __init serial_console_setup(struct console *co, char *options)
-{
-	struct mac_serial *info;
-	int	baud = 38400;
-	int	bits = 8;
-	int	parity = 'n';
-	int	cflag = CREAD | HUPCL | CLOCAL;
-	int	brg;
-	char	*s;
-	long	flags;
-
-	/* Find out how many Z8530 SCCs we have */
-	if (zs_chain == 0)
-		probe_sccs();
-
-	if (zs_chain == 0)
-		return -1;
-
-	/* Do we have the device asked for? */
-	if (co->index >= zs_channels_found)
-		return -1;
-	info = zs_soft + co->index;
-
-	set_scc_power(info, 1);
-
-	/* Reset the channel */
-	write_zsreg(info->zs_channel, R9, CHRA);
-
-	if (options) {
-		baud = simple_strtoul(options, NULL, 10);
-		s = options;
-		while(*s >= '0' && *s <= '9')
-			s++;
-		if (*s)
-			parity = *s++;
-		if (*s)
-			bits   = *s - '0';
-	}
-
-	/*
-	 *	Now construct a cflag setting.
-	 */
-	switch(baud) {
-	case 1200:
-		cflag |= B1200;
-		break;
-	case 2400:
-		cflag |= B2400;
-		break;
-	case 4800:
-		cflag |= B4800;
-		break;
-	case 9600:
-		cflag |= B9600;
-		break;
-	case 19200:
-		cflag |= B19200;
-		break;
-	case 57600:
-		cflag |= B57600;
-		break;
-	case 115200:
-		cflag |= B115200;
-		break;
-	case 38400:
-	default:
-		cflag |= B38400;
-		break;
-	}
-	switch(bits) {
-	case 7:
-		cflag |= CS7;
-		break;
-	default:
-	case 8:
-		cflag |= CS8;
-		break;
-	}
-	switch(parity) {
-	case 'o': case 'O':
-		cflag |= PARENB | PARODD;
-		break;
-	case 'e': case 'E':
-		cflag |= PARENB;
-		break;
-	}
-	co->cflag = cflag;
-
-	spin_lock_irqsave(&info->lock, flags);
-        memset(info->curregs, 0, sizeof(info->curregs));
-
-	info->zs_baud = baud;
-	info->clk_divisor = 16;
-	switch (info->zs_baud) {
-	case ZS_CLOCK/16:	/* 230400 */
-		info->curregs[4] = X16CLK;
-		info->curregs[11] = 0;
-		break;
-	case ZS_CLOCK/32:	/* 115200 */
-		info->curregs[4] = X32CLK;
-		info->curregs[11] = 0;
-		break;
-	default:
-		info->curregs[4] = X16CLK;
-		info->curregs[11] = TCBR | RCBR;
-		brg = BPS_TO_BRG(info->zs_baud, ZS_CLOCK/info->clk_divisor);
-		info->curregs[12] = (brg & 255);
-		info->curregs[13] = ((brg >> 8) & 255);
-		info->curregs[14] = BRENABL;
-	}
-
-	/* byte size and parity */
-	info->curregs[3] &= ~RxNBITS_MASK;
-	info->curregs[5] &= ~TxNBITS_MASK;
-	switch (cflag & CSIZE) {
-	case CS5:
-		info->curregs[3] |= Rx5;
-		info->curregs[5] |= Tx5;
-		break;
-	case CS6:
-		info->curregs[3] |= Rx6;
-		info->curregs[5] |= Tx6;
-		break;
-	case CS7:
-		info->curregs[3] |= Rx7;
-		info->curregs[5] |= Tx7;
-		break;
-	case CS8:
-	default: /* defaults to 8 bits */
-		info->curregs[3] |= Rx8;
-		info->curregs[5] |= Tx8;
-		break;
-	}
-        info->curregs[5] |= TxENAB | RTS | DTR;
-	info->pendregs[3] = info->curregs[3];
-	info->pendregs[5] = info->curregs[5];
-
-	info->curregs[4] &= ~(SB_MASK | PAR_ENA | PAR_EVEN);
-	if (cflag & CSTOPB) {
-		info->curregs[4] |= SB2;
-	} else {
-		info->curregs[4] |= SB1;
-	}
-	if (cflag & PARENB) {
-		info->curregs[4] |= PAR_ENA;
-		if (!(cflag & PARODD)) {
-			info->curregs[4] |= PAR_EVEN;
-		}
-	}
-	info->pendregs[4] = info->curregs[4];
-
-	if (!(cflag & CLOCAL)) {
-		if (!(info->curregs[15] & DCDIE))
-			info->read_reg_zero = read_zsreg(info->zs_channel, 0);
-		info->curregs[15] |= DCDIE;
-	} else
-		info->curregs[15] &= ~DCDIE;
-	if (cflag & CRTSCTS) {
-		info->curregs[15] |= CTSIE;
-		if ((read_zsreg(info->zs_channel, 0) & CTS) != 0)
-			info->tx_stopped = 1;
-	} else {
-		info->curregs[15] &= ~CTSIE;
-		info->tx_stopped = 0;
-	}
-	info->pendregs[15] = info->curregs[15];
-
-	/* Load up the new values */
-	load_zsregs(info->zs_channel, info->curregs);
-
-	spin_unlock_irqrestore(&info->lock, flags);
-
-	return 0;
-}
-
-static struct console sercons = {
-	.name		= "ttyS",
-	.write		= serial_console_write,
-	.device		= serial_console_device,
-	.setup		= serial_console_setup,
-	.flags		= CON_PRINTBUFFER,
-	.index		= -1,
-};
-
-/*
- *	Register console.
- */
-static void __init mac_scc_console_init(void)
-{
-	register_console(&sercons);
-}
-console_initcall(mac_scc_console_init);
-
-#endif /* ifdef CONFIG_SERIAL_CONSOLE */
-
-#ifdef CONFIG_KGDB
-/* These are for receiving and sending characters under the kgdb
- * source level kernel debugger.
- */
-void putDebugChar(char kgdb_char)
-{
-	struct mac_zschannel *chan = zs_kgdbchan;
-	while ((read_zsreg(chan, 0) & Tx_BUF_EMP) == 0)
-		udelay(5);
-	write_zsdata(chan, kgdb_char);
-}
-
-char getDebugChar(void)
-{
-	struct mac_zschannel *chan = zs_kgdbchan;
-	while((read_zsreg(chan, 0) & Rx_CH_AV) == 0)
-		eieio(); /*barrier();*/
-	return read_zsdata(chan);
-}
-
-void kgdb_interruptible(int yes)
-{
-	struct mac_zschannel *chan = zs_kgdbchan;
-	int one, nine;
-	nine = read_zsreg(chan, 9);
-	if (yes == 1) {
-		one = EXT_INT_ENAB|INT_ALL_Rx;
-		nine |= MIE;
-		printk("turning serial ints on\n");
-	} else {
-		one = RxINT_DISAB;
-		nine &= ~MIE;
-		printk("turning serial ints off\n");
-	}
-	write_zsreg(chan, 1, one);
-	write_zsreg(chan, 9, nine);
-}
-
-/* This sets up the serial port we're using, and turns on
- * interrupts for that channel, so kgdb is usable once we're done.
- */
-static inline void kgdb_chaninit(struct mac_zschannel *ms, int intson, int bps)
-{
-	int brg;
-	int i, x;
-	volatile char *sccc = ms->control;
-	brg = BPS_TO_BRG(bps, ZS_CLOCK/16);
-	printk("setting bps on kgdb line to %d [brg=%x]\n", bps, brg);
-	for (i = 20000; i != 0; --i) {
-		x = *sccc; eieio();
-	}
-	for (i = 0; i < sizeof(scc_inittab); ++i) {
-		write_zsreg(ms, scc_inittab[i], scc_inittab[i+1]);
-		i++;
-	}
-}
-
-/* This is called at boot time to prime the kgdb serial debugging
- * serial line.  The 'tty_num' argument is 0 for /dev/ttya and 1
- * for /dev/ttyb which is determined in setup_arch() from the
- * boot command line flags.
- * XXX at the moment probably only channel A will work
- */
-void __init zs_kgdb_hook(int tty_num)
-{
-	/* Find out how many Z8530 SCCs we have */
-	if (zs_chain == 0)
-		probe_sccs();
-
-	set_scc_power(&zs_soft[tty_num], 1);
-
-	zs_kgdbchan = zs_soft[tty_num].zs_channel;
-	zs_soft[tty_num].change_needed = 0;
-	zs_soft[tty_num].clk_divisor = 16;
-	zs_soft[tty_num].zs_baud = 38400;
-	zs_soft[tty_num].kgdb_channel = 1;     /* This runs kgdb */
-
-	/* Turn on transmitter/receiver at 8-bits/char */
-        kgdb_chaninit(zs_soft[tty_num].zs_channel, 1, 38400);
-	printk("KGDB: on channel %d initialized\n", tty_num);
-	set_debug_traps(); /* init stub */
-}
-#endif /* ifdef CONFIG_KGDB */
-
-#ifdef CONFIG_PMAC_PBOOK
-/*
- * notify clients before sleep and reset bus afterwards
- */
-int
-serial_notify_sleep(struct pmu_sleep_notifier *self, int when)
-{
-	int i;
-
-	switch (when) {
-	case PBOOK_SLEEP_REQUEST:
-	case PBOOK_SLEEP_REJECT:
-		break;
-
-	case PBOOK_SLEEP_NOW:
-		for (i=0; i<zs_channels_found; i++) {
-			struct mac_serial *info = &zs_soft[i];
-			if (info->flags & ZILOG_INITIALIZED) {
-				shutdown(info);
-				info->flags |= ZILOG_SLEEPING;
-			}
-		}
-		break;
-	case PBOOK_WAKE:
-		for (i=0; i<zs_channels_found; i++) {
-			struct mac_serial *info = &zs_soft[i];
-			if (info->flags & ZILOG_SLEEPING) {
-				info->flags &= ~ZILOG_SLEEPING;
-				startup(info);
-			}
-		}
-		break;
-	}
-	return PBOOK_SLEEP_OK;
-}
-#endif /* CONFIG_PMAC_PBOOK */
Index: linux-work/drivers/macintosh/macserial.h
===================================================================
--- linux-work.orig/drivers/macintosh/macserial.h	2005-05-02 10:48:11.000000000 +1000
+++ /dev/null	1970-01-01 00:00:00.000000000 +0000
@@ -1,461 +0,0 @@
-/*
- * macserial.h: Definitions for the Macintosh Z8530 serial driver.
- *
- * Adapted from drivers/sbus/char/sunserial.h by Paul Mackerras.
- *
- * Copyright (C) 1996 Paul Mackerras ([email-masked])
- * Copyright (C) 1995 David S. Miller ([email-masked])
- */
-#ifndef _MACSERIAL_H
-#define _MACSERIAL_H
-
-#include <linux/spinlock.h>
-
-#define NUM_ZSREGS    16
-
-struct serial_struct {
-	int	type;
-	int	line;
-	int	port;
-	int	irq;
-	int	flags;
-	int	xmit_fifo_size;
-	int	custom_divisor;
-	int	baud_base;
-	unsigned short	close_delay;
-	char	reserved_char[2];
-	int	hub6;
-	unsigned short	closing_wait; /* time to wait before closing */
-	unsigned short	closing_wait2; /* no longer used... */
-	int	reserved[4];
-};
-
-/*
- * For the close wait times, 0 means wait forever for serial port to
- * flush its output.  65535 means don't wait at all.
- */
-#define ZILOG_CLOSING_WAIT_INF	0
-#define ZILOG_CLOSING_WAIT_NONE	65535
-
-/*
- * Definitions for ZILOG_struct (and serial_struct) flags field
- */
-#define ZILOG_HUP_NOTIFY	0x0001	/* Notify getty on hangups and closes 
-				   	 * on the callout port */
-#define ZILOG_FOURPORT 		0x0002	/* Set OU1, OUT2 per AST Fourport settings */
-#define ZILOG_SAK		0x0004	/* Secure Attention Key (Orange book) */
-#define ZILOG_SPLIT_TERMIOS	0x0008	/* Separate termios for dialin/callout */
-
-#define ZILOG_SPD_MASK		0x0030
-#define ZILOG_SPD_HI		0x0010	/* Use 56000 instead of 38400 bps */
-
-#define ZILOG_SPD_VHI		0x0020  /* Use 115200 instead of 38400 bps */
-#define ZILOG_SPD_CUST		0x0030  /* Use user-specified divisor */
-
-#define ZILOG_SKIP_TEST		0x0040	/* Skip UART test during autoconfiguration */
-#define ZILOG_AUTO_IRQ 		0x0080	/* Do automatic IRQ during autoconfiguration */
-#define ZILOG_SESSION_LOCKOUT	0x0100	/* Lock out cua opens based on session */
-#define ZILOG_PGRP_LOCKOUT	0x0200	/* Lock out cua opens based on pgrp */
-#define ZILOG_CALLOUT_NOHUP	0x0400	/* Don't do hangups for cua device */
-
-#define ZILOG_FLAGS		0x0FFF	/* Possible legal ZILOG flags */
-#define ZILOG_USR_MASK		0x0430	/* Legal flags that non-privileged
-					 * users can set or reset */
-
-/* Internal flags used only by kernel/chr_drv/serial.c */
-#define ZILOG_INITIALIZED	0x80000000 /* Serial port was initialized */
-#define ZILOG_CALLOUT_ACTIVE	0x40000000 /* Call out device is active */
-#define ZILOG_NORMAL_ACTIVE	0x20000000 /* Normal device is active */
-#define ZILOG_BOOT_AUTOCONF	0x10000000 /* Autoconfigure port on bootup */
-#define ZILOG_CLOSING		0x08000000 /* Serial port is closing */
-#define ZILOG_CTS_FLOW		0x04000000 /* Do CTS flow control */
-#define ZILOG_CHECK_CD		0x02000000 /* i.e., CLOCAL */
-#define ZILOG_SLEEPING		0x01000000 /* have shut it down for sleep */
-
-/* Software state per channel */
-
-#ifdef __KERNEL__
-/*
- * This is our internal structure for each serial port's state.
- * 
- * Many fields are paralleled by the structure used by the serial_struct
- * structure.
- *
- * For definitions of the flags field, see tty.h
- */
-
-struct mac_serial;
-
-struct mac_zschannel {
-	volatile unsigned char*	control;
-	volatile unsigned char*	data;
-	spinlock_t		lock;
-	/* Used for debugging */
-	struct mac_serial*	parent;
-};
-
-struct mac_dma {
-	volatile struct dbdma_regs	dma;
-	volatile unsigned short		res_count;
-	volatile unsigned short		command;
-	volatile unsigned int		buf_addr;
-};
-
-struct mac_serial {
-	struct mac_serial *zs_next;	/* For IRQ servicing chain */
-	struct mac_zschannel *zs_channel; /* Channel registers */
-	struct mac_zschannel *zs_chan_a;	/* A side registers */
-	unsigned char read_reg_zero;
-	struct device_node* dev_node;
-	spinlock_t lock;
-
-	char soft_carrier;  /* Use soft carrier on this channel */
-	char break_abort;   /* Is serial console in, so process brk/abrt */
-	char kgdb_channel;  /* Kgdb is running on this channel */
-	char is_cons;       /* Is this our console. */
-	char is_internal_modem; /* is connected to an internal modem */
-	char is_irda;		/* is connected to an IrDA codec */
-	int port_type;		/* Port type for pmac_feature */
-	unsigned char tx_active; /* character is being xmitted */
-	unsigned char tx_stopped; /* output is suspended */
-	unsigned char power_wait; /* waiting for power-up delay to expire */
-
-	/* We need to know the current clock divisor
-	 * to read the bps rate the chip has currently
-	 * loaded.
-	 */
-	unsigned char clk_divisor;  /* May be 1, 16, 32, or 64 */
-	int zs_baud;
-
-	/* Current write register values */
-	unsigned char curregs[NUM_ZSREGS];
-
-	/* Values we need to set next opportunity */
-	unsigned char pendregs[NUM_ZSREGS];
-
-	char change_needed;
-
-	int			magic;
-	int			baud_base;
-	int			port;
-	int			irq;
-	int			flags; 		/* defined in tty.h */
-	int			type; 		/* UART type */
-	struct tty_struct 	*tty;
-	int			read_status_mask;
-	int			ignore_status_mask;
-	int			timeout;
-	int			xmit_fifo_size;
-	int			custom_divisor;
-	int			x_char;	/* xon/xoff character */
-	int			close_delay;
-	unsigned short		closing_wait;
-	unsigned short		closing_wait2;
-	unsigned long		event;
-	unsigned long		last_active;
-	int			line;
-	int			count;	    /* # of fd on device */
-	int			blocked_open; /* # of blocked opens */
-	unsigned char 		*xmit_buf;
-	int			xmit_head;
-	int			xmit_tail;
-	int			xmit_cnt;
-	struct work_struct	tqueue;
-	wait_queue_head_t	open_wait;
-	wait_queue_head_t	close_wait;
-
-	volatile struct dbdma_regs *tx_dma;
-	int			tx_dma_irq;
-	volatile struct dbdma_cmd *tx_cmds;
-	volatile struct mac_dma *rx;
-	int 			rx_dma_irq;
-	volatile struct dbdma_cmd **rx_cmds;
-	unsigned char		**rx_char_buf;
-	unsigned char		**rx_flag_buf;
-#define	RX_BUF_SIZE	256
-	int			rx_nbuf;
-	int			rx_done_bytes;
-	int			rx_ubuf;
-	int			rx_fbuf;
-#define	RX_NO_FBUF	(-1)
-	int			rx_cbuf;
-	spinlock_t		rx_dma_lock;
-	int			has_dma;
-	int			dma_initted;
-	void			*dma_priv;
-	struct timer_list	poll_dma_timer;
-#define RX_DMA_TIMER	(jiffies + 10*HZ/1000)
-
-	struct timer_list	powerup_timer;
-};
-
-
-#define SERIAL_MAGIC 0x5301
-
-/*
- * The size of the serial xmit buffer is 1 page, or 4096 bytes
- */
-#define SERIAL_XMIT_SIZE 4096
-
-/*
- * Events are used to schedule things to happen at timer-interrupt
- * time, instead of at rs interrupt time.
- */
-#define RS_EVENT_WRITE_WAKEUP	0
-
-#endif /* __KERNEL__ */
-
-/* Conversion routines to/from brg time constants from/to bits
- * per second.
- */
-#define BRG_TO_BPS(brg, freq) ((freq) / 2 / ((brg) + 2))
-#define BPS_TO_BRG(bps, freq) ((((freq) + (bps)) / (2 * (bps))) - 2)
-
-/* The Zilog register set */
-
-#define	FLAG	0x7e
-
-/* Write Register 0 */
-#define	R0	0		/* Register selects */
-#define	R1	1
-#define	R2	2
-#define	R3	3
-#define	R4	4
-#define	R5	5
-#define	R6	6
-#define	R7	7
-#define	R8	8
-#define	R9	9
-#define	R10	10
-#define	R11	11
-#define	R12	12
-#define	R13	13
-#define	R14	14
-#define	R15	15
-
-#define	NULLCODE	0	/* Null Code */
-#define	POINT_HIGH	0x8	/* Select upper half of registers */
-#define	RES_EXT_INT	0x10	/* Reset Ext. Status Interrupts */
-#define	SEND_ABORT	0x18	/* HDLC Abort */
-#define	RES_RxINT_FC	0x20	/* Reset RxINT on First Character */
-#define	RES_Tx_P	0x28	/* Reset TxINT Pending */
-#define	ERR_RES		0x30	/* Error Reset */
-#define	RES_H_IUS	0x38	/* Reset highest IUS */
-
-#define	RES_Rx_CRC	0x40	/* Reset Rx CRC Checker */
-#define	RES_Tx_CRC	0x80	/* Reset Tx CRC Checker */
-#define	RES_EOM_L	0xC0	/* Reset EOM latch */
-
-/* Write Register 1 */
-
-#define	EXT_INT_ENAB	0x1	/* Ext Int Enable */
-#define	TxINT_ENAB	0x2	/* Tx Int Enable */
-#define	PAR_SPEC	0x4	/* Parity is special condition */
-
-#define	RxINT_DISAB	0	/* Rx Int Disable */
-#define	RxINT_FCERR	0x8	/* Rx Int on First Character Only or Error */
-#define	INT_ALL_Rx	0x10	/* Int on all Rx Characters or error */
-#define	INT_ERR_Rx	0x18	/* Int on error only */
-
-#define	WT_RDY_RT	0x20	/* W/Req reflects recv if 1, xmit if 0 */
-#define	WT_FN_RDYFN	0x40	/* W/Req pin is DMA request if 1, wait if 0 */
-#define	WT_RDY_ENAB	0x80	/* Enable W/Req pin */
-
-/* Write Register #2 (Interrupt Vector) */
-
-/* Write Register 3 */
-
-#define	RxENABLE	0x1	/* Rx Enable */
-#define	SYNC_L_INH	0x2	/* Sync Character Load Inhibit */
-#define	ADD_SM		0x4	/* Address Search Mode (SDLC) */
-#define	RxCRC_ENAB	0x8	/* Rx CRC Enable */
-#define	ENT_HM		0x10	/* Enter Hunt Mode */
-#define	AUTO_ENAB	0x20	/* Auto Enables */
-#define	Rx5		0x0	/* Rx 5 Bits/Character */
-#define	Rx7		0x40	/* Rx 7 Bits/Character */
-#define	Rx6		0x80	/* Rx 6 Bits/Character */
-#define	Rx8		0xc0	/* Rx 8 Bits/Character */
-#define RxNBITS_MASK	0xc0
-
-/* Write Register 4 */
-
-#define	PAR_ENA		0x1	/* Parity Enable */
-#define	PAR_EVEN	0x2	/* Parity Even/Odd* */
-
-#define	SYNC_ENAB	0	/* Sync Modes Enable */
-#define	SB1		0x4	/* 1 stop bit/char */
-#define	SB15		0x8	/* 1.5 stop bits/char */
-#define	SB2		0xc	/* 2 stop bits/char */
-#define SB_MASK		0xc
-
-#define	MONSYNC		0	/* 8 Bit Sync character */
-#define	BISYNC		0x10	/* 16 bit sync character */
-#define	SDLC		0x20	/* SDLC Mode (01111110 Sync Flag) */
-#define	EXTSYNC		0x30	/* External Sync Mode */
-
-#define	X1CLK		0x0	/* x1 clock mode */
-#define	X16CLK		0x40	/* x16 clock mode */
-#define	X32CLK		0x80	/* x32 clock mode */
-#define	X64CLK		0xC0	/* x64 clock mode */
-#define XCLK_MASK	0xC0
-
-/* Write Register 5 */
-
-#define	TxCRC_ENAB	0x1	/* Tx CRC Enable */
-#define	RTS		0x2	/* RTS */
-#define	SDLC_CRC	0x4	/* SDLC/CRC-16 */
-#define	TxENAB		0x8	/* Tx Enable */
-#define	SND_BRK		0x10	/* Send Break */
-#define	Tx5		0x0	/* Tx 5 bits (or less)/character */
-#define	Tx7		0x20	/* Tx 7 bits/character */
-#define	Tx6		0x40	/* Tx 6 bits/character */
-#define	Tx8		0x60	/* Tx 8 bits/character */
-#define TxNBITS_MASK	0x60
-#define	DTR		0x80	/* DTR */
-
-/* Write Register 6 (Sync bits 0-7/SDLC Address Field) */
-
-/* Write Register 7 (Sync bits 8-15/SDLC 01111110) */
-
-/* Write Register 7' (Some enhanced feature control) */
-#define	ENEXREAD	0x40	/* Enable read of some write registers */
-
-/* Write Register 8 (transmit buffer) */
-
-/* Write Register 9 (Master interrupt control) */
-#define	VIS	1	/* Vector Includes Status */
-#define	NV	2	/* No Vector */
-#define	DLC	4	/* Disable Lower Chain */
-#define	MIE	8	/* Master Interrupt Enable */
-#define	STATHI	0x10	/* Status high */
-#define	NORESET	0	/* No reset on write to R9 */
-#define	CHRB	0x40	/* Reset channel B */
-#define	CHRA	0x80	/* Reset channel A */
-#define	FHWRES	0xc0	/* Force hardware reset */
-
-/* Write Register 10 (misc control bits) */
-#define	BIT6	1	/* 6 bit/8bit sync */
-#define	LOOPMODE 2	/* SDLC Loop mode */
-#define	ABUNDER	4	/* Abort/flag on SDLC xmit underrun */
-#define	MARKIDLE 8	/* Mark/flag on idle */
-#define	GAOP	0x10	/* Go active on poll */
-#define	NRZ	0	/* NRZ mode */
-#define	NRZI	0x20	/* NRZI mode */
-#define	FM1	0x40	/* FM1 (transition = 1) */
-#define	FM0	0x60	/* FM0 (transition = 0) */
-#define	CRCPS	0x80	/* CRC Preset I/O */
-
-/* Write Register 11 (Clock Mode control) */
-#define	TRxCXT	0	/* TRxC = Xtal output */
-#define	TRxCTC	1	/* TRxC = Transmit clock */
-#define	TRxCBR	2	/* TRxC = BR Generator Output */
-#define	TRxCDP	3	/* TRxC = DPLL output */
-#define	TRxCOI	4	/* TRxC O/I */
-#define	TCRTxCP	0	/* Transmit clock = RTxC pin */
-#define	TCTRxCP	8	/* Transmit clock = TRxC pin */
-#define	TCBR	0x10	/* Transmit clock = BR Generator output */
-#define	TCDPLL	0x18	/* Transmit clock = DPLL output */
-#define	RCRTxCP	0	/* Receive clock = RTxC pin */
-#define	RCTRxCP	0x20	/* Receive clock = TRxC pin */
-#define	RCBR	0x40	/* Receive clock = BR Generator output */
-#define	RCDPLL	0x60	/* Receive clock = DPLL output */
-#define	RTxCX	0x80	/* RTxC Xtal/No Xtal */
-
-/* Write Register 12 (lower byte of baud rate generator time constant) */
-
-/* Write Register 13 (upper byte of baud rate generator time constant) */
-
-/* Write Register 14 (Misc control bits) */
-#define	BRENABL	1	/* Baud rate generator enable */
-#define	BRSRC	2	/* Baud rate generator source */
-#define	DTRREQ	4	/* DTR/Request function */
-#define	AUTOECHO 8	/* Auto Echo */
-#define	LOOPBAK	0x10	/* Local loopback */
-#define	SEARCH	0x20	/* Enter search mode */
-#define	RMC	0x40	/* Reset missing clock */
-#define	DISDPLL	0x60	/* Disable DPLL */
-#define	SSBR	0x80	/* Set DPLL source = BR generator */
-#define	SSRTxC	0xa0	/* Set DPLL source = RTxC */
-#define	SFMM	0xc0	/* Set FM mode */
-#define	SNRZI	0xe0	/* Set NRZI mode */
-
-/* Write Register 15 (external/status interrupt control) */
-#define	EN85C30	1	/* Enable some 85c30-enhanced registers */
-#define	ZCIE	2	/* Zero count IE */
-#define	ENSTFIFO 4	/* Enable status FIFO (SDLC) */
-#define	DCDIE	8	/* DCD IE */
-#define	SYNCIE	0x10	/* Sync/hunt IE */
-#define	CTSIE	0x20	/* CTS IE */
-#define	TxUIE	0x40	/* Tx Underrun/EOM IE */
-#define	BRKIE	0x80	/* Break/Abort IE */
-
-
-/* Read Register 0 */
-#define	Rx_CH_AV	0x1	/* Rx Character Available */
-#define	ZCOUNT		0x2	/* Zero count */
-#define	Tx_BUF_EMP	0x4	/* Tx Buffer empty */
-#define	DCD		0x8	/* DCD */
-#define	SYNC_HUNT	0x10	/* Sync/hunt */
-#define	CTS		0x20	/* CTS */
-#define	TxEOM		0x40	/* Tx underrun */
-#define	BRK_ABRT	0x80	/* Break/Abort */
-
-/* Read Register 1 */
-#define	ALL_SNT		0x1	/* All sent */
-/* Residue Data for 8 Rx bits/char programmed */
-#define	RES3		0x8	/* 0/3 */
-#define	RES4		0x4	/* 0/4 */
-#define	RES5		0xc	/* 0/5 */
-#define	RES6		0x2	/* 0/6 */
-#define	RES7		0xa	/* 0/7 */
-#define	RES8		0x6	/* 0/8 */
-#define	RES18		0xe	/* 1/8 */
-#define	RES28		0x0	/* 2/8 */
-/* Special Rx Condition Interrupts */
-#define	PAR_ERR		0x10	/* Parity error */
-#define	Rx_OVR		0x20	/* Rx Overrun Error */
-#define	FRM_ERR		0x40	/* CRC/Framing Error */
-#define	END_FR		0x80	/* End of Frame (SDLC) */
-
-/* Read Register 2 (channel b only) - Interrupt vector */
-#define	CHB_Tx_EMPTY	0x00
-#define	CHB_EXT_STAT	0x02
-#define	CHB_Rx_AVAIL	0x04
-#define	CHB_SPECIAL	0x06
-#define	CHA_Tx_EMPTY	0x08
-#define	CHA_EXT_STAT	0x0a
-#define	CHA_Rx_AVAIL	0x0c
-#define	CHA_SPECIAL	0x0e
-#define	STATUS_MASK	0x06
-
-/* Read Register 3 (interrupt pending register) ch a only */
-#define	CHBEXT	0x1		/* Channel B Ext/Stat IP */
-#define	CHBTxIP	0x2		/* Channel B Tx IP */
-#define	CHBRxIP	0x4		/* Channel B Rx IP */
-#define	CHAEXT	0x8		/* Channel A Ext/Stat IP */
-#define	CHATxIP	0x10		/* Channel A Tx IP */
-#define	CHARxIP	0x20		/* Channel A Rx IP */
-
-/* Read Register 8 (receive data register) */
-
-/* Read Register 10  (misc status bits) */
-#define	ONLOOP	2		/* On loop */
-#define	LOOPSEND 0x10		/* Loop sending */
-#define	CLK2MIS	0x40		/* Two clocks missing */
-#define	CLK1MIS	0x80		/* One clock missing */
-
-/* Read Register 12 (lower byte of baud rate generator constant) */
-
-/* Read Register 13 (upper byte of baud rate generator constant) */
-
-/* Read Register 15 (value of WR 15) */
-
-/* Misc macros */
-#define ZS_CLEARERR(channel)    (write_zsreg(channel, 0, ERR_RES))
-#define ZS_CLEARFIFO(channel)   do { volatile unsigned char garbage; \
-				     garbage = read_zsdata(channel); \
-				     garbage = read_zsdata(channel); \
-				     garbage = read_zsdata(channel); \
-				} while(0)
-
-#endif /* !(_MACSERIAL_H) */