tty: move obsolete and broken tty drivers to drivers/staging/tty/

As planned by Arnd Bergmann, this moves the following drivers to the
drivers/staging/tty/ directory where they will be removed after 2.6.41
if no one steps up to claim them.
	epca
	epca
	ip2
	istallion
	riscom8
	serial167
	specialix
	stallion

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

27 files changed, 0 insertions, 28968 deletions

diff --git a/drivers/char/Kconfig b/drivers/char/Kconfig
index 1adfac6a7b0b..7b8cf0295f6c 100644
--- a/drivers/char/Kconfig
+++ b/drivers/char/Kconfig
@@ -15,63 +15,6 @@ config DEVKMEM
 	  kind of kernel debugging operations.
 	  When in doubt, say "N".
 
-config COMPUTONE
-	tristate "Computone IntelliPort Plus serial support"
-	depends on SERIAL_NONSTANDARD && (ISA || EISA || PCI)
-	---help---
-	  This driver supports the entire family of Intelliport II/Plus
-	  controllers with the exception of the MicroChannel controllers and
-	  products previous to the Intelliport II. These are multiport cards,
-	  which give you many serial ports. You would need something like this
-	  to connect more than two modems to your Linux box, for instance in
-	  order to become a dial-in server. If you have a card like that, say
-	  Y here and read <file:Documentation/serial/computone.txt>.
-
-	  To compile this driver as module, choose M here: the
-	  module will be called ip2.
-
-config DIGIEPCA
-	tristate "Digiboard Intelligent Async Support"
-	depends on SERIAL_NONSTANDARD && (ISA || EISA || PCI)
-	---help---
-	  This is a driver for Digi International's Xx, Xeve, and Xem series
-	  of cards which provide multiple serial ports. You would need
-	  something like this to connect more than two modems to your Linux
-	  box, for instance in order to become a dial-in server. This driver
-	  supports the original PC (ISA) boards as well as PCI, and EISA. If
-	  you have a card like this, say Y here and read the file
-	  <file:Documentation/serial/digiepca.txt>.
-
-	  To compile this driver as a module, choose M here: the
-	  module will be called epca.
-
-config RISCOM8
-	tristate "SDL RISCom/8 card support"
-	depends on SERIAL_NONSTANDARD
-	help
-	  This is a driver for the SDL Communications RISCom/8 multiport card,
-	  which gives you many serial ports. You would need something like
-	  this to connect more than two modems to your Linux box, for instance
-	  in order to become a dial-in server. If you have a card like that,
-	  say Y here and read the file <file:Documentation/serial/riscom8.txt>.
-
-	  Also it's possible to say M here and compile this driver as kernel
-	  loadable module; the module will be called riscom8.
-
-config SPECIALIX
-	tristate "Specialix IO8+ card support"
-	depends on SERIAL_NONSTANDARD
-	help
-	  This is a driver for the Specialix IO8+ multiport card (both the
-	  ISA and the PCI version) which gives you many serial ports. You
-	  would need something like this to connect more than two modems to
-	  your Linux box, for instance in order to become a dial-in server.
-
-	  If you have a card like that, say Y here and read the file
-	  <file:Documentation/serial/specialix.txt>. Also it's possible to say
-	  M here and compile this driver as kernel loadable module which will be
-	  called specialix.
-
 config SX
 	tristate "Specialix SX (and SI) card support"
 	depends on SERIAL_NONSTANDARD && (PCI || EISA || ISA) && BROKEN
@@ -112,28 +55,6 @@ config STALDRV
 	  in this case.  If you have never heard about all this, it's safe to
 	  say N.
 
-config STALLION
-	tristate "Stallion EasyIO or EC8/32 support"
-	depends on STALDRV && (ISA || EISA || PCI)
-	help
-	  If you have an EasyIO or EasyConnection 8/32 multiport Stallion
-	  card, then this is for you; say Y.  Make sure to read
-	  <file:Documentation/serial/stallion.txt>.
-
-	  To compile this driver as a module, choose M here: the
-	  module will be called stallion.
-
-config ISTALLION
-	tristate "Stallion EC8/64, ONboard, Brumby support"
-	depends on STALDRV && (ISA || EISA || PCI)
-	help
-	  If you have an EasyConnection 8/64, ONboard, Brumby or Stallion
-	  serial multiport card, say Y here. Make sure to read
-	  <file:Documentation/serial/stallion.txt>.
-
-	  To compile this driver as a module, choose M here: the
-	  module will be called istallion.
-
 config A2232
 	tristate "Commodore A2232 serial support (EXPERIMENTAL)"
 	depends on EXPERIMENTAL && ZORRO && BROKEN
diff --git a/drivers/char/Makefile b/drivers/char/Makefile
index f5dc7c9bce6b..48bb8acbea49 100644
--- a/drivers/char/Makefile
+++ b/drivers/char/Makefile
@@ -8,15 +8,8 @@ obj-y				+= misc.o
 obj-$(CONFIG_MVME147_SCC)	+= generic_serial.o vme_scc.o
 obj-$(CONFIG_MVME162_SCC)	+= generic_serial.o vme_scc.o
 obj-$(CONFIG_BVME6000_SCC)	+= generic_serial.o vme_scc.o
-obj-$(CONFIG_SERIAL167)		+= serial167.o
-obj-$(CONFIG_STALLION)		+= stallion.o
-obj-$(CONFIG_ISTALLION)		+= istallion.o
-obj-$(CONFIG_DIGIEPCA)		+= epca.o
-obj-$(CONFIG_SPECIALIX)		+= specialix.o
 obj-$(CONFIG_A2232)		+= ser_a2232.o generic_serial.o
 obj-$(CONFIG_ATARI_DSP56K)	+= dsp56k.o
-obj-$(CONFIG_COMPUTONE)		+= ip2/
-obj-$(CONFIG_RISCOM8)		+= riscom8.o
 obj-$(CONFIG_SX)		+= sx.o generic_serial.o
 obj-$(CONFIG_RIO)		+= rio/ generic_serial.o
 obj-$(CONFIG_RAW_DRIVER)	+= raw.o
diff --git a/drivers/char/epca.c b/drivers/char/epca.c
deleted file mode 100644
index 7ad3638967ae..000000000000
--- a/drivers/char/epca.c
+++ /dev/null
@@ -1,2784 +0,0 @@
-/*
-	Copyright (C) 1996  Digi International.
-
-	For technical support please email digiLinux@dgii.com or
-	call Digi tech support at (612) 912-3456
-
-	** This driver is no longer supported by Digi **
-
-	Much of this design and code came from epca.c which was
-	copyright (C) 1994, 1995 Troy De Jongh, and subsquently
-	modified by David Nugent, Christoph Lameter, Mike McLagan.
-
-	This program is free software; you can redistribute it and/or modify
-	it under the terms of the GNU General Public License as published by
-	the Free Software Foundation; either version 2 of the License, or
-	(at your option) any later version.
-
-	This program is distributed in the hope that it will be useful,
-	but WITHOUT ANY WARRANTY; without even the implied warranty of
-	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-	GNU General Public License for more details.
-
-	You should have received a copy of the GNU General Public License
-	along with this program; if not, write to the Free Software
-	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-*/
-/* See README.epca for change history --DAT*/
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/types.h>
-#include <linux/init.h>
-#include <linux/sched.h>
-#include <linux/serial.h>
-#include <linux/delay.h>
-#include <linux/ctype.h>
-#include <linux/tty.h>
-#include <linux/tty_flip.h>
-#include <linux/slab.h>
-#include <linux/ioport.h>
-#include <linux/interrupt.h>
-#include <linux/uaccess.h>
-#include <linux/io.h>
-#include <linux/spinlock.h>
-#include <linux/pci.h>
-#include "digiPCI.h"
-
-
-#include "digi1.h"
-#include "digiFep1.h"
-#include "epca.h"
-#include "epcaconfig.h"
-
-#define VERSION            "1.3.0.1-LK2.6"
-
-/* This major needs to be submitted to Linux to join the majors list */
-#define DIGIINFOMAJOR       35  /* For Digi specific ioctl */
-
-
-#define MAXCARDS 7
-#define epcaassert(x, msg)  if (!(x)) epca_error(__LINE__, msg)
-
-#define PFX "epca: "
-
-static int nbdevs, num_cards, liloconfig;
-static int digi_poller_inhibited = 1 ;
-
-static int setup_error_code;
-static int invalid_lilo_config;
-
-/*
- * The ISA boards do window flipping into the same spaces so its only sane with
- * a single lock. It's still pretty efficient. This lock guards the hardware
- * and the tty_port lock guards the kernel side stuff like use counts. Take
- * this lock inside the port lock if you must take both.
- */
-static DEFINE_SPINLOCK(epca_lock);
-
-/* MAXBOARDS is typically 12, but ISA and EISA cards are restricted
-   to 7 below. */
-static struct board_info boards[MAXBOARDS];
-
-static struct tty_driver *pc_driver;
-static struct tty_driver *pc_info;
-
-/* ------------------ Begin Digi specific structures -------------------- */
-
-/*
- * digi_channels represents an array of structures that keep track of each
- * channel of the Digi product. Information such as transmit and receive
- * pointers, termio data, and signal definitions (DTR, CTS, etc ...) are stored
- * here. This structure is NOT used to overlay the cards physical channel
- * structure.
- */
-static struct channel digi_channels[MAX_ALLOC];
-
-/*
- * card_ptr is an array used to hold the address of the first channel structure
- * of each card. This array will hold the addresses of various channels located
- * in digi_channels.
- */
-static struct channel *card_ptr[MAXCARDS];
-
-static struct timer_list epca_timer;
-
-/*
- * Begin generic memory functions. These functions will be alias (point at)
- * more specific functions dependent on the board being configured.
- */
-static void memwinon(struct board_info *b, unsigned int win);
-static void memwinoff(struct board_info *b, unsigned int win);
-static void globalwinon(struct channel *ch);
-static void rxwinon(struct channel *ch);
-static void txwinon(struct channel *ch);
-static void memoff(struct channel *ch);
-static void assertgwinon(struct channel *ch);
-static void assertmemoff(struct channel *ch);
-
-/* ---- Begin more 'specific' memory functions for cx_like products --- */
-
-static void pcxem_memwinon(struct board_info *b, unsigned int win);
-static void pcxem_memwinoff(struct board_info *b, unsigned int win);
-static void pcxem_globalwinon(struct channel *ch);
-static void pcxem_rxwinon(struct channel *ch);
-static void pcxem_txwinon(struct channel *ch);
-static void pcxem_memoff(struct channel *ch);
-
-/* ------ Begin more 'specific' memory functions for the pcxe ------- */
-
-static void pcxe_memwinon(struct board_info *b, unsigned int win);
-static void pcxe_memwinoff(struct board_info *b, unsigned int win);
-static void pcxe_globalwinon(struct channel *ch);
-static void pcxe_rxwinon(struct channel *ch);
-static void pcxe_txwinon(struct channel *ch);
-static void pcxe_memoff(struct channel *ch);
-
-/* ---- Begin more 'specific' memory functions for the pc64xe and pcxi ---- */
-/* Note : pc64xe and pcxi share the same windowing routines */
-
-static void pcxi_memwinon(struct board_info *b, unsigned int win);
-static void pcxi_memwinoff(struct board_info *b, unsigned int win);
-static void pcxi_globalwinon(struct channel *ch);
-static void pcxi_rxwinon(struct channel *ch);
-static void pcxi_txwinon(struct channel *ch);
-static void pcxi_memoff(struct channel *ch);
-
-/* - Begin 'specific' do nothing memory functions needed for some cards - */
-
-static void dummy_memwinon(struct board_info *b, unsigned int win);
-static void dummy_memwinoff(struct board_info *b, unsigned int win);
-static void dummy_globalwinon(struct channel *ch);
-static void dummy_rxwinon(struct channel *ch);
-static void dummy_txwinon(struct channel *ch);
-static void dummy_memoff(struct channel *ch);
-static void dummy_assertgwinon(struct channel *ch);
-static void dummy_assertmemoff(struct channel *ch);
-
-static struct channel *verifyChannel(struct tty_struct *);
-static void pc_sched_event(struct channel *, int);
-static void epca_error(int, char *);
-static void pc_close(struct tty_struct *, struct file *);
-static void shutdown(struct channel *, struct tty_struct *tty);
-static void pc_hangup(struct tty_struct *);
-static int pc_write_room(struct tty_struct *);
-static int pc_chars_in_buffer(struct tty_struct *);
-static void pc_flush_buffer(struct tty_struct *);
-static void pc_flush_chars(struct tty_struct *);
-static int pc_open(struct tty_struct *, struct file *);
-static void post_fep_init(unsigned int crd);
-static void epcapoll(unsigned long);
-static void doevent(int);
-static void fepcmd(struct channel *, int, int, int, int, int);
-static unsigned termios2digi_h(struct channel *ch, unsigned);
-static unsigned termios2digi_i(struct channel *ch, unsigned);
-static unsigned termios2digi_c(struct channel *ch, unsigned);
-static void epcaparam(struct tty_struct *, struct channel *);
-static void receive_data(struct channel *, struct tty_struct *tty);
-static int pc_ioctl(struct tty_struct *,
-			unsigned int, unsigned long);
-static int info_ioctl(struct tty_struct *,
-			unsigned int, unsigned long);
-static void pc_set_termios(struct tty_struct *, struct ktermios *);
-static void do_softint(struct work_struct *work);
-static void pc_stop(struct tty_struct *);
-static void pc_start(struct tty_struct *);
-static void pc_throttle(struct tty_struct *tty);
-static void pc_unthrottle(struct tty_struct *tty);
-static int pc_send_break(struct tty_struct *tty, int msec);
-static void setup_empty_event(struct tty_struct *tty, struct channel *ch);
-
-static int pc_write(struct tty_struct *, const unsigned char *, int);
-static int pc_init(void);
-static int init_PCI(void);
-
-/*
- * Table of functions for each board to handle memory. Mantaining parallelism
- * is a *very* good idea here. The idea is for the runtime code to blindly call
- * these functions, not knowing/caring about the underlying hardware. This
- * stuff should contain no conditionals; if more functionality is needed a
- * different entry should be established. These calls are the interface calls
- * and are the only functions that should be accessed. Anyone caught making
- * direct calls deserves what they get.
- */
-static void memwinon(struct board_info *b, unsigned int win)
-{
-	b->memwinon(b, win);
-}
-
-static void memwinoff(struct board_info *b, unsigned int win)
-{
-	b->memwinoff(b, win);
-}
-
-static void globalwinon(struct channel *ch)
-{
-	ch->board->globalwinon(ch);
-}
-
-static void rxwinon(struct channel *ch)
-{
-	ch->board->rxwinon(ch);
-}
-
-static void txwinon(struct channel *ch)
-{
-	ch->board->txwinon(ch);
-}
-
-static void memoff(struct channel *ch)
-{
-	ch->board->memoff(ch);
-}
-static void assertgwinon(struct channel *ch)
-{
-	ch->board->assertgwinon(ch);
-}
-
-static void assertmemoff(struct channel *ch)
-{
-	ch->board->assertmemoff(ch);
-}
-
-/* PCXEM windowing is the same as that used in the PCXR and CX series cards. */
-static void pcxem_memwinon(struct board_info *b, unsigned int win)
-{
-	outb_p(FEPWIN | win, b->port + 1);
-}
-
-static void pcxem_memwinoff(struct board_info *b, unsigned int win)
-{
-	outb_p(0, b->port + 1);
-}
-
-static void pcxem_globalwinon(struct channel *ch)
-{
-	outb_p(FEPWIN, (int)ch->board->port + 1);
-}
-
-static void pcxem_rxwinon(struct channel *ch)
-{
-	outb_p(ch->rxwin, (int)ch->board->port + 1);
-}
-
-static void pcxem_txwinon(struct channel *ch)
-{
-	outb_p(ch->txwin, (int)ch->board->port + 1);
-}
-
-static void pcxem_memoff(struct channel *ch)
-{
-	outb_p(0, (int)ch->board->port + 1);
-}
-
-/* ----------------- Begin pcxe memory window stuff ------------------ */
-static void pcxe_memwinon(struct board_info *b, unsigned int win)
-{
-	outb_p(FEPWIN | win, b->port + 1);
-}
-
-static void pcxe_memwinoff(struct board_info *b, unsigned int win)
-{
-	outb_p(inb(b->port) & ~FEPMEM, b->port + 1);
-	outb_p(0, b->port + 1);
-}
-
-static void pcxe_globalwinon(struct channel *ch)
-{
-	outb_p(FEPWIN, (int)ch->board->port + 1);
-}
-
-static void pcxe_rxwinon(struct channel *ch)
-{
-	outb_p(ch->rxwin, (int)ch->board->port + 1);
-}
-
-static void pcxe_txwinon(struct channel *ch)
-{
-	outb_p(ch->txwin, (int)ch->board->port + 1);
-}
-
-static void pcxe_memoff(struct channel *ch)
-{
-	outb_p(0, (int)ch->board->port);
-	outb_p(0, (int)ch->board->port + 1);
-}
-
-/* ------------- Begin pc64xe and pcxi memory window stuff -------------- */
-static void pcxi_memwinon(struct board_info *b, unsigned int win)
-{
-	outb_p(inb(b->port) | FEPMEM, b->port);
-}
-
-static void pcxi_memwinoff(struct board_info *b, unsigned int win)
-{
-	outb_p(inb(b->port) & ~FEPMEM, b->port);
-}
-
-static void pcxi_globalwinon(struct channel *ch)
-{
-	outb_p(FEPMEM, ch->board->port);
-}
-
-static void pcxi_rxwinon(struct channel *ch)
-{
-	outb_p(FEPMEM, ch->board->port);
-}
-
-static void pcxi_txwinon(struct channel *ch)
-{
-	outb_p(FEPMEM, ch->board->port);
-}
-
-static void pcxi_memoff(struct channel *ch)
-{
-	outb_p(0, ch->board->port);
-}
-
-static void pcxi_assertgwinon(struct channel *ch)
-{
-	epcaassert(inb(ch->board->port) & FEPMEM, "Global memory off");
-}
-
-static void pcxi_assertmemoff(struct channel *ch)
-{
-	epcaassert(!(inb(ch->board->port) & FEPMEM), "Memory on");
-}
-
-/*
- * Not all of the cards need specific memory windowing routines. Some cards
- * (Such as PCI) needs no windowing routines at all. We provide these do
- * nothing routines so that the same code base can be used. The driver will
- * ALWAYS call a windowing routine if it thinks it needs to; regardless of the
- * card. However, dependent on the card the routine may or may not do anything.
- */
-static void dummy_memwinon(struct board_info *b, unsigned int win)
-{
-}
-
-static void dummy_memwinoff(struct board_info *b, unsigned int win)
-{
-}
-
-static void dummy_globalwinon(struct channel *ch)
-{
-}
-
-static void dummy_rxwinon(struct channel *ch)
-{
-}
-
-static void dummy_txwinon(struct channel *ch)
-{
-}
-
-static void dummy_memoff(struct channel *ch)
-{
-}
-
-static void dummy_assertgwinon(struct channel *ch)
-{
-}
-
-static void dummy_assertmemoff(struct channel *ch)
-{
-}
-
-static struct channel *verifyChannel(struct tty_struct *tty)
-{
-	/*
-	 * This routine basically provides a sanity check. It insures that the
-	 * channel returned is within the proper range of addresses as well as
-	 * properly initialized. If some bogus info gets passed in
-	 * through tty->driver_data this should catch it.
-	 */
-	if (tty) {
-		struct channel *ch = tty->driver_data;
-		if (ch >= &digi_channels[0] && ch < &digi_channels[nbdevs]) {
-			if (ch->magic == EPCA_MAGIC)
-				return ch;
-		}
-	}
-	return NULL;
-}
-
-static void pc_sched_event(struct channel *ch, int event)
-{
-	/*
-	 * We call this to schedule interrupt processing on some event. The
-	 * kernel sees our request and calls the related routine in OUR driver.
-	 */
-	ch->event |= 1 << event;
-	schedule_work(&ch->tqueue);
-}
-
-static void epca_error(int line, char *msg)
-{
-	printk(KERN_ERR "epca_error (Digi): line = %d %s\n", line, msg);
-}
-
-static void pc_close(struct tty_struct *tty, struct file *filp)
-{
-	struct channel *ch;
-	struct tty_port *port;
-	/*
-	 * verifyChannel returns the channel from the tty struct if it is
-	 * valid. This serves as a sanity check.
-	 */
-	ch = verifyChannel(tty);
-	if (ch == NULL)
-		return;
-	port = &ch->port;
-
-	if (tty_port_close_start(port, tty, filp) == 0)
-		return;
-
-	pc_flush_buffer(tty);
-	shutdown(ch, tty);
-
-	tty_port_close_end(port, tty);
-	ch->event = 0;	/* FIXME: review ch->event locking */
-	tty_port_tty_set(port, NULL);
-}
-
-static void shutdown(struct channel *ch, struct tty_struct *tty)
-{
-	unsigned long flags;
-	struct board_chan __iomem *bc;
-	struct tty_port *port = &ch->port;
-
-	if (!(port->flags & ASYNC_INITIALIZED))
-		return;
-
-	spin_lock_irqsave(&epca_lock, flags);
-
-	globalwinon(ch);
-	bc = ch->brdchan;
-
-	/*
-	 * In order for an event to be generated on the receipt of data the
-	 * idata flag must be set. Since we are shutting down, this is not
-	 * necessary clear this flag.
-	 */
-	if (bc)
-		writeb(0, &bc->idata);
-
-	/* If we're a modem control device and HUPCL is on, drop RTS & DTR. */
-	if (tty->termios->c_cflag & HUPCL)  {
-		ch->omodem &= ~(ch->m_rts | ch->m_dtr);
-		fepcmd(ch, SETMODEM, 0, ch->m_dtr | ch->m_rts, 10, 1);
-	}
-	memoff(ch);
-
-	/*
-	 * The channel has officialy been closed. The next time it is opened it
-	 * will have to reinitialized. Set a flag to indicate this.
-	 */
-	/* Prevent future Digi programmed interrupts from coming active */
-	port->flags &= ~ASYNC_INITIALIZED;
-	spin_unlock_irqrestore(&epca_lock, flags);
-}
-
-static void pc_hangup(struct tty_struct *tty)
-{
-	struct channel *ch;
-
-	/*
-	 * verifyChannel returns the channel from the tty struct if it is
-	 * valid. This serves as a sanity check.
-	 */
-	ch = verifyChannel(tty);
-	if (ch != NULL) {
-		pc_flush_buffer(tty);
-		tty_ldisc_flush(tty);
-		shutdown(ch, tty);
-
-		ch->event = 0;	/* FIXME: review locking of ch->event */
-		tty_port_hangup(&ch->port);
-	}
-}
-
-static int pc_write(struct tty_struct *tty,
-			const unsigned char *buf, int bytesAvailable)
-{
-	unsigned int head, tail;
-	int dataLen;
-	int size;
-	int amountCopied;
-	struct channel *ch;
-	unsigned long flags;
-	int remain;
-	struct board_chan __iomem *bc;
-
-	/*
-	 * pc_write is primarily called directly by the kernel routine
-	 * tty_write (Though it can also be called by put_char) found in
-	 * tty_io.c. pc_write is passed a line discipline buffer where the data
-	 * to be written out is stored. The line discipline implementation
-	 * itself is done at the kernel level and is not brought into the
-	 * driver.
-	 */
-
-	/*
-	 * verifyChannel returns the channel from the tty struct if it is
-	 * valid. This serves as a sanity check.
-	 */
-	ch = verifyChannel(tty);
-	if (ch == NULL)
-		return 0;
-
-	/* Make a pointer to the channel data structure found on the board. */
-	bc   = ch->brdchan;
-	size = ch->txbufsize;
-	amountCopied = 0;
-
-	spin_lock_irqsave(&epca_lock, flags);
-	globalwinon(ch);
-
-	head = readw(&bc->tin) & (size - 1);
-	tail = readw(&bc->tout);
-
-	if (tail != readw(&bc->tout))
-		tail = readw(&bc->tout);
-	tail &= (size - 1);
-
-	if (head >= tail) {
-		/* head has not wrapped */
-		/*
-		 * remain (much like dataLen above) represents the total amount
-		 * of space available on the card for data. Here dataLen
-		 * represents the space existing between the head pointer and
-		 * the end of buffer. This is important because a memcpy cannot
-		 * be told to automatically wrap around when it hits the buffer
-		 * end.
-		 */
-		dataLen = size - head;
-		remain = size - (head - tail) - 1;
-	} else {
-		/* head has wrapped around */
-		remain = tail - head - 1;
-		dataLen = remain;
-	}
-	/*
-	 * Check the space on the card. If we have more data than space; reduce
-	 * the amount of data to fit the space.
-	 */
-	bytesAvailable = min(remain, bytesAvailable);
-	txwinon(ch);
-	while (bytesAvailable > 0) {
-		/* there is data to copy onto card */
-
-		/*
-		 * If head is not wrapped, the below will make sure the first
-		 * data copy fills to the end of card buffer.
-		 */
-		dataLen = min(bytesAvailable, dataLen);
-		memcpy_toio(ch->txptr + head, buf, dataLen);
-		buf += dataLen;
-		head += dataLen;
-		amountCopied += dataLen;
-		bytesAvailable -= dataLen;
-
-		if (head >= size) {
-			head = 0;
-			dataLen = tail;
-		}
-	}
-	ch->statusflags |= TXBUSY;
-	globalwinon(ch);
-	writew(head, &bc->tin);
-
-	if ((ch->statusflags & LOWWAIT) == 0)  {
-		ch->statusflags |= LOWWAIT;
-		writeb(1, &bc->ilow);
-	}
-	memoff(ch);
-	spin_unlock_irqrestore(&epca_lock, flags);
-	return amountCopied;
-}
-
-static int pc_write_room(struct tty_struct *tty)
-{
-	int remain = 0;
-	struct channel *ch;
-	unsigned long flags;
-	unsigned int head, tail;
-	struct board_chan __iomem *bc;
-	/*
-	 * verifyChannel returns the channel from the tty struct if it is
-	 * valid. This serves as a sanity check.
-	 */
-	ch = verifyChannel(tty);
-	if (ch != NULL) {
-		spin_lock_irqsave(&epca_lock, flags);
-		globalwinon(ch);
-
-		bc   = ch->brdchan;
-		head = readw(&bc->tin) & (ch->txbufsize - 1);
-		tail = readw(&bc->tout);
-
-		if (tail != readw(&bc->tout))
-			tail = readw(&bc->tout);
-		/* Wrap tail if necessary */
-		tail &= (ch->txbufsize - 1);
-		remain = tail - head - 1;
-		if (remain < 0)
-			remain += ch->txbufsize;
-
-		if (remain && (ch->statusflags & LOWWAIT) == 0) {
-			ch->statusflags |= LOWWAIT;
-			writeb(1, &bc->ilow);
-		}
-		memoff(ch);
-		spin_unlock_irqrestore(&epca_lock, flags);
-	}
-	/* Return how much room is left on card */
-	return remain;
-}
-
-static int pc_chars_in_buffer(struct tty_struct *tty)
-{
-	int chars;
-	unsigned int ctail, head, tail;
-	int remain;
-	unsigned long flags;
-	struct channel *ch;
-	struct board_chan __iomem *bc;
-	/*
-	 * verifyChannel returns the channel from the tty struct if it is
-	 * valid. This serves as a sanity check.
-	 */
-	ch = verifyChannel(tty);
-	if (ch == NULL)
-		return 0;
-
-	spin_lock_irqsave(&epca_lock, flags);
-	globalwinon(ch);
-
-	bc = ch->brdchan;
-	tail = readw(&bc->tout);
-	head = readw(&bc->tin);
-	ctail = readw(&ch->mailbox->cout);
-
-	if (tail == head && readw(&ch->mailbox->cin) == ctail &&
-						readb(&bc->tbusy) == 0)
-		chars = 0;
-	else  { /* Begin if some space on the card has been used */
-		head = readw(&bc->tin) & (ch->txbufsize - 1);
-		tail &= (ch->txbufsize - 1);
-		/*
-		 * The logic here is basically opposite of the above
-		 * pc_write_room here we are finding the amount of bytes in the
-		 * buffer filled. Not the amount of bytes empty.
-		 */
-		remain = tail - head - 1;
-		if (remain < 0)
-			remain += ch->txbufsize;
-		chars = (int)(ch->txbufsize - remain);
-		/*
-		 * Make it possible to wakeup anything waiting for output in
-		 * tty_ioctl.c, etc.
-		 *
-		 * If not already set. Setup an event to indicate when the
-		 * transmit buffer empties.
-		 */
-		if (!(ch->statusflags & EMPTYWAIT))
-			setup_empty_event(tty, ch);
-	} /* End if some space on the card has been used */
-	memoff(ch);
-	spin_unlock_irqrestore(&epca_lock, flags);
-	/* Return number of characters residing on card. */
-	return chars;
-}
-
-static void pc_flush_buffer(struct tty_struct *tty)
-{
-	unsigned int tail;
-	unsigned long flags;
-	struct channel *ch;
-	struct board_chan __iomem *bc;
-	/*
-	 * verifyChannel returns the channel from the tty struct if it is
-	 * valid. This serves as a sanity check.
-	 */
-	ch = verifyChannel(tty);
-	if (ch == NULL)
-		return;
-
-	spin_lock_irqsave(&epca_lock, flags);
-	globalwinon(ch);
-	bc   = ch->brdchan;
-	tail = readw(&bc->tout);
-	/* Have FEP move tout pointer; effectively flushing transmit buffer */
-	fepcmd(ch, STOUT, (unsigned) tail, 0, 0, 0);
-	memoff(ch);
-	spin_unlock_irqrestore(&epca_lock, flags);
-	tty_wakeup(tty);
-}
-
-static void pc_flush_chars(struct tty_struct *tty)
-{
-	struct channel *ch;
-	/*
-	 * verifyChannel returns the channel from the tty struct if it is
-	 * valid. This serves as a sanity check.
-	 */
-	ch = verifyChannel(tty);
-	if (ch != NULL) {
-		unsigned long flags;
-		spin_lock_irqsave(&epca_lock, flags);
-		/*
-		 * If not already set and the transmitter is busy setup an
-		 * event to indicate when the transmit empties.
-		 */
-		if ((ch->statusflags & TXBUSY) &&
-				!(ch->statusflags & EMPTYWAIT))
-			setup_empty_event(tty, ch);
-		spin_unlock_irqrestore(&epca_lock, flags);
-	}
-}
-
-static int epca_carrier_raised(struct tty_port *port)
-{
-	struct channel *ch = container_of(port, struct channel, port);
-	if (ch->imodem & ch->dcd)
-		return 1;
-	return 0;
-}
-
-static void epca_dtr_rts(struct tty_port *port, int onoff)
-{
-}
-
-static int pc_open(struct tty_struct *tty, struct file *filp)
-{
-	struct channel *ch;
-	struct tty_port *port;
-	unsigned long flags;
-	int line, retval, boardnum;
-	struct board_chan __iomem *bc;
-	unsigned int head;
-
-	line = tty->index;
-	if (line < 0 || line >= nbdevs)
-		return -ENODEV;
-
-	ch = &digi_channels[line];
-	port = &ch->port;
-	boardnum = ch->boardnum;
-
-	/* Check status of board configured in system.  */
-
-	/*
-	 * I check to see if the epca_setup routine detected a user error. It
-	 * might be better to put this in pc_init, but for the moment it go