char: pcmcia: remove all the drivers

These char PCMCIA drivers are buggy[1] and receive only minimal care. It
was concluded[2], that we should try to remove most pcmcia drivers
completely. Let's start with these char broken one.

Note that I also removed a UAPI header: include/uapi/linux/cm4000_cs.h.
I found only coccinelle tests mentioning some ioctl constants from that
file. But they are not actually used. Anyway, should someone complain,
we may reintroduce the header (or its parts).

[1] https://lore.kernel.org/all/[e-mail]/
[2] https://lore.kernel.org/all/[e-mail]/

Signed-off-by: Jiri Slaby (SUSE) <[e-mail]>
Cc: "Hyunwoo Kim" <[e-mail]>
Cc: Harald Welte <[e-mail]>
Cc: Lubomir Rintel <[e-mail]>
Cc: Arnd Bergmann <[e-mail]>
Cc: Greg Kroah-Hartman <[e-mail]>
Acked-by: Dominik Brodowski <[e-mail]>
Reviewed-by: Arnd Bergmann <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

Documentation/process/magic-number.rst

···
 APM_BIOS_MAGIC        0x4101           apm_user                 ``arch/x86/kernel/apm_32.c``
 FASYNC_MAGIC          0x4601           fasync_struct            ``include/linux/fs.h``
 SLIP_MAGIC            0x5302           slip                     ``drivers/net/slip.h``
-MGSLPC_MAGIC          0x5402           mgslpc_info              ``drivers/char/pcmcia/synclink_cs.c``
 BAYCOM_MAGIC          0x19730510       baycom_state             ``drivers/net/baycom_epp.c``
 HDLCDRV_MAGIC         0x5ac6e778       hdlcdrv_state            ``include/linux/hdlcdrv.h``
 KV_MAGIC              0x5f4b565f       kernel_vars_s            ``arch/mips/include/asm/sn/klkernvars.h``

Documentation/translations/it_IT/process/magic-number.rst

···
 APM_BIOS_MAGIC        0x4101           apm_user                 ``arch/x86/kernel/apm_32.c``
 FASYNC_MAGIC          0x4601           fasync_struct            ``include/linux/fs.h``
 SLIP_MAGIC            0x5302           slip                     ``drivers/net/slip.h``
-MGSLPC_MAGIC          0x5402           mgslpc_info              ``drivers/char/pcmcia/synclink_cs.c``
 BAYCOM_MAGIC          0x19730510       baycom_state             ``drivers/net/baycom_epp.c``
 HDLCDRV_MAGIC         0x5ac6e778       hdlcdrv_state            ``include/linux/hdlcdrv.h``
 KV_MAGIC              0x5f4b565f       kernel_vars_s            ``arch/mips/include/asm/sn/klkernvars.h``

Documentation/translations/sp_SP/process/magic-number.rst

···
 APM_BIOS_MAGIC        0x4101           apm_user                 ``arch/x86/kernel/apm_32.c``
 FASYNC_MAGIC          0x4601           fasync_struct            ``include/linux/fs.h``
 SLIP_MAGIC            0x5302           slip                     ``drivers/net/slip.h``
-MGSLPC_MAGIC          0x5402           mgslpc_info              ``drivers/char/pcmcia/synclink_cs.c``
 BAYCOM_MAGIC          0x19730510       baycom_state             ``drivers/net/baycom_epp.c``
 HDLCDRV_MAGIC         0x5ac6e778       hdlcdrv_state            ``include/linux/hdlcdrv.h``
 KV_MAGIC              0x5f4b565f       kernel_vars_s            ``arch/mips/include/asm/sn/klkernvars.h``

Documentation/translations/zh_CN/process/magic-number.rst

···
 APM_BIOS_MAGIC        0x4101           apm_user                 ``arch/x86/kernel/apm_32.c``
 FASYNC_MAGIC          0x4601           fasync_struct            ``include/linux/fs.h``
 SLIP_MAGIC            0x5302           slip                     ``drivers/net/slip.h``
-MGSLPC_MAGIC          0x5402           mgslpc_info              ``drivers/char/pcmcia/synclink_cs.c``
 BAYCOM_MAGIC          0x19730510       baycom_state             ``drivers/net/baycom_epp.c``
 HDLCDRV_MAGIC         0x5ac6e778       hdlcdrv_state            ``include/linux/hdlcdrv.h``
 KV_MAGIC              0x5f4b565f       kernel_vars_s            ``arch/mips/include/asm/sn/klkernvars.h``

Documentation/translations/zh_TW/process/magic-number.rst

···
 APM_BIOS_MAGIC        0x4101           apm_user                 ``arch/x86/kernel/apm_32.c``
 FASYNC_MAGIC          0x4601           fasync_struct            ``include/linux/fs.h``
 SLIP_MAGIC            0x5302           slip                     ``drivers/net/slip.h``
-MGSLPC_MAGIC          0x5402           mgslpc_info              ``drivers/char/pcmcia/synclink_cs.c``
 BAYCOM_MAGIC          0x19730510       baycom_state             ``drivers/net/baycom_epp.c``
 HDLCDRV_MAGIC         0x5ac6e778       hdlcdrv_state            ``include/linux/hdlcdrv.h``
 KV_MAGIC              0x5f4b565f       kernel_vars_s            ``arch/mips/include/asm/sn/klkernvars.h``

Documentation/userspace-api/ioctl/ioctl-number.rst

···
 'b'   00-FF                                                          conflict! bit3 vme host bridge
                                                                      <mailto:[e-mail]>
 'b'   00-0F  linux/dma-buf.h                                         conflict!
-'c'   all    linux/cm4000_cs.h                                       conflict!
 'c'   00-7F  linux/comstats.h                                        conflict!
 'c'   00-7F  linux/coda.h                                            conflict!
 'c'   00-1F  linux/chio.h                                            conflict!

MAINTAINERS

···
 F:	Documentation/filesystems/omfs.rst
 F:	fs/omfs/
 
-OMNIKEY CARDMAN 4000 DRIVER
-M:	Harald Welte <[e-mail]>
-S:	Maintained
-F:	drivers/char/pcmcia/cm4000_cs.c
-F:	include/linux/cm4000_cs.h
-F:	include/uapi/linux/cm4000_cs.h
-
-OMNIKEY CARDMAN 4040 DRIVER
-M:	Harald Welte <[e-mail]>
-S:	Maintained
-F:	drivers/char/pcmcia/cm4040_cs.*
-
 OMNIVISION OG01A1B SENSOR DRIVER
 M:	Shawn Tu <[e-mail]>
 L:	[e-mail]
···
 F:	include/linux/wait.h
 F:	include/uapi/linux/sched.h
 F:	kernel/sched/
-
-SCR24X CHIP CARD INTERFACE DRIVER
-M:	Lubomir Rintel <[e-mail]>
-S:	Supported
-F:	drivers/char/pcmcia/scr24x_cs.c
 
 SCSI RDMA PROTOCOL (SRP) INITIATOR
 M:	Bart Van Assche <[e-mail]>

arch/powerpc/configs/ppc6xx_defconfig

···
 CONFIG_HW_RANDOM_VIRTIO=m
 CONFIG_NVRAM=y
 CONFIG_DTLK=m
-CONFIG_CARDMAN_4000=m
-CONFIG_CARDMAN_4040=m
 CONFIG_IPWIRELESS=m
 CONFIG_I2C_CHARDEV=m
 CONFIG_I2C_HYDRA=m

drivers/char/Kconfig

···
 	  To compile this driver as a module, choose M here: the
 	  module will be called sonypi.
 
-source "drivers/char/pcmcia/Kconfig"
-
 config MWAVE
 	tristate "ACP Modem (Mwave) support"
 	depends on X86 && TTY

drivers/char/Makefile

···
 
 obj-$(CONFIG_MWAVE)		+= mwave/
 obj-y				+= agp/
-obj-$(CONFIG_PCMCIA)		+= pcmcia/
 
 obj-$(CONFIG_HANGCHECK_TIMER)	+= hangcheck-timer.o
 obj-$(CONFIG_TCG_TPM)		+= tpm/

drivers/char/pcmcia/Kconfig

···
-# SPDX-License-Identifier: GPL-2.0-only
-#
-# PCMCIA character device configuration
-#
-
-menu "PCMCIA character devices"
-	depends on PCMCIA!=n
-
-config SYNCLINK_CS
-	tristate "SyncLink PC Card support"
-	depends on PCMCIA && TTY
-	help
-	  Enable support for the SyncLink PC Card serial adapter, running
-	  asynchronous and HDLC communications up to 512Kbps. The port is
-	  selectable for RS-232, V.35, RS-449, RS-530, and X.21
-
-	  This driver may be built as a module ( = code which can be
-	  inserted in and removed from the running kernel whenever you want).
-	  The module will be called synclink_cs.  If you want to do that, say M
-	  here.
-
-config CARDMAN_4000
-	tristate "Omnikey Cardman 4000 support"
-	depends on PCMCIA
-	select BITREVERSE
-	help
-	  Enable support for the Omnikey Cardman 4000 PCMCIA Smartcard
-	  reader.
-
-	  This kernel driver requires additional userspace support, either
-	  by the vendor-provided PC/SC ifd_handler (http://www.omnikey.com/),
-	  or via the cm4000 backend of OpenCT (http://www.opensc-project.org/opensc).
-
-config CARDMAN_4040
-	tristate "Omnikey CardMan 4040 support"
-	depends on PCMCIA
-	help
-	  Enable support for the Omnikey CardMan 4040 PCMCIA Smartcard
-	  reader.
-
-	  This card is basically a USB CCID device connected to a FIFO
-	  in I/O space.  To use the kernel driver, you will need either the
-	  PC/SC ifdhandler provided from the Omnikey homepage
-	  (http://www.omnikey.com/), or a current development version of OpenCT
-	  (http://www.opensc-project.org/opensc).
-
-config SCR24X
-	tristate "SCR24x Chip Card Interface support"
-	depends on PCMCIA
-	help
-	  Enable support for the SCR24x PCMCIA Chip Card Interface.
-
-	  To compile this driver as a module, choose M here.
-	  The module will be called scr24x_cs..
-
-	  If unsure say N.
-
-endmenu
-

drivers/char/pcmcia/Makefile

···
-# SPDX-License-Identifier: GPL-2.0-only
-#
-# drivers/char/pcmcia/Makefile
-#
-# Makefile for the Linux PCMCIA char device drivers.
-#
-
-obj-$(CONFIG_SYNCLINK_CS) += synclink_cs.o
-obj-$(CONFIG_CARDMAN_4000) += cm4000_cs.o
-obj-$(CONFIG_CARDMAN_4040) += cm4040_cs.o
-obj-$(CONFIG_SCR24X) += scr24x_cs.o

drivers/char/pcmcia/cm4000_cs.c

···
- /*
-  * A driver for the PCMCIA Smartcard Reader "Omnikey CardMan Mobile 4000"
-  *
-  * cm4000_cs.c [e-mail]
-  *
-  * Tue Oct 23 11:32:43 GMT 2001 herp - cleaned up header files
-  * Sun Jan 20 10:11:15 MET 2002 herp - added modversion header files
-  * Thu Nov 14 16:34:11 GMT 2002 mh   - added PPS functionality
-  * Tue Nov 19 16:36:27 GMT 2002 mh   - added SUSPEND/RESUME functionailty
-  * Wed Jul 28 12:55:01 CEST 2004 mh  - kernel 2.6 adjustments
-  *
-  * current version: 2.4.0gm4
-  *
-  * (C) 2000,2001,2002,2003,2004 Omnikey AG
-  *
-  * (C) 2005-2006 Harald Welte <[e-mail]>
-  * 	- Adhere to Kernel process/coding-style.rst
-  * 	- Port to 2.6.13 "new" style PCMCIA
-  * 	- Check for copy_{from,to}_user return values
-  * 	- Use nonseekable_open()
-  * 	- add class interface for udev device creation
-  *
-  * All rights reserved. Licensed under dual BSD/GPL license.
-  */
-
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/slab.h>
-#include <linux/init.h>
-#include <linux/fs.h>
-#include <linux/delay.h>
-#include <linux/bitrev.h>
-#include <linux/mutex.h>
-#include <linux/uaccess.h>
-#include <linux/io.h>
-
-#include <pcmcia/cistpl.h>
-#include <pcmcia/cisreg.h>
-#include <pcmcia/ciscode.h>
-#include <pcmcia/ds.h>
-
-#include <linux/cm4000_cs.h>
-
-/* #define ATR_CSUM */
-
-#define reader_to_dev(x)	(&x->p_dev->dev)
-
-/* n (debug level) is ignored */
-/* additional debug output may be enabled by re-compiling with
- * CM4000_DEBUG set */
-/* #define CM4000_DEBUG */
-#define DEBUGP(n, rdr, x, args...) do { 		\
-		dev_dbg(reader_to_dev(rdr), "%s:" x, 	\
-			   __func__ , ## args);		\
-	} while (0)
-
-static DEFINE_MUTEX(cmm_mutex);
-
-#define	T_1SEC		(HZ)
-#define	T_10MSEC	msecs_to_jiffies(10)
-#define	T_20MSEC	msecs_to_jiffies(20)
-#define	T_40MSEC	msecs_to_jiffies(40)
-#define	T_50MSEC	msecs_to_jiffies(50)
-#define	T_100MSEC	msecs_to_jiffies(100)
-#define	T_500MSEC	msecs_to_jiffies(500)
-
-static void cm4000_release(struct pcmcia_device *link);
-
-static int major;		/* major number we get from the kernel */
-
-/* note: the first state has to have number 0 always */
-
-#define	M_FETCH_ATR	0
-#define	M_TIMEOUT_WAIT	1
-#define	M_READ_ATR_LEN	2
-#define	M_READ_ATR	3
-#define	M_ATR_PRESENT	4
-#define	M_BAD_CARD	5
-#define M_CARDOFF	6
-
-#define	LOCK_IO			0
-#define	LOCK_MONITOR		1
-
-#define IS_AUTOPPS_ACT		 6
-#define	IS_PROCBYTE_PRESENT	 7
-#define	IS_INVREV		 8
-#define IS_ANY_T0		 9
-#define	IS_ANY_T1		10
-#define	IS_ATR_PRESENT		11
-#define	IS_ATR_VALID		12
-#define	IS_CMM_ABSENT		13
-#define	IS_BAD_LENGTH		14
-#define	IS_BAD_CSUM		15
-#define	IS_BAD_CARD		16
-
-#define REG_FLAGS0(x)		(x + 0)
-#define REG_FLAGS1(x)		(x + 1)
-#define REG_NUM_BYTES(x)	(x + 2)
-#define REG_BUF_ADDR(x)		(x + 3)
-#define REG_BUF_DATA(x)		(x + 4)
-#define REG_NUM_SEND(x)		(x + 5)
-#define REG_BAUDRATE(x)		(x + 6)
-#define REG_STOPBITS(x)		(x + 7)
-
-struct cm4000_dev {
-	struct pcmcia_device *p_dev;
-
-	unsigned char atr[MAX_ATR];
-	unsigned char rbuf[512];
-	unsigned char sbuf[512];
-
-	wait_queue_head_t devq;		/* when removing cardman must not be
-					   zeroed! */
-
-	wait_queue_head_t ioq;		/* if IO is locked, wait on this Q */
-	wait_queue_head_t atrq;		/* wait for ATR valid */
-	wait_queue_head_t readq;	/* used by write to wake blk.read */
-
-	/* warning: do not move this struct group.
-	 * initialising to zero depends on it - see ZERO_DEV below.  */
-	struct_group(init,
-	unsigned char atr_csum;
-	unsigned char atr_len_retry;
-	unsigned short atr_len;
-	unsigned short rlen;	/* bytes avail. after write */
-	unsigned short rpos;	/* latest read pos. write zeroes */
-	unsigned char procbyte;	/* T=0 procedure byte */
-	unsigned char mstate;	/* state of card monitor */
-	unsigned char cwarn;	/* slow down warning */
-	unsigned char flags0;	/* cardman IO-flags 0 */
-	unsigned char flags1;	/* cardman IO-flags 1 */
-	unsigned int mdelay;	/* variable monitor speeds, in jiffies */
-
-	unsigned int baudv;	/* baud value for speed */
-	unsigned char ta1;
-	unsigned char proto;	/* T=0, T=1, ... */
-	unsigned long flags;	/* lock+flags (MONITOR,IO,ATR) * for concurrent
-				   access */
-
-	unsigned char pts[4];
-
-	struct timer_list timer;	/* used to keep monitor running */
-	int monitor_running;
-	);
-};
-
-#define	ZERO_DEV(dev)	memset(&((dev)->init), 0, sizeof((dev)->init))
-
-static struct pcmcia_device *dev_table[CM4000_MAX_DEV];
-static struct class *cmm_class;
-
-/* This table doesn't use spaces after the comma between fields and thus
- * violates process/coding-style.rst.  However, I don't really think wrapping it around will
- * make it any clearer to read -HW */
-static unsigned char fi_di_table[10][14] = {
-/*FI     00   01   02   03   04   05   06   07   08   09   10   11   12   13 */
-/*DI */
-/* 0 */ {0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11},
-/* 1 */ {0x01,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x91,0x11,0x11,0x11,0x11},
-/* 2 */ {0x02,0x12,0x22,0x32,0x11,0x11,0x11,0x11,0x11,0x92,0xA2,0xB2,0x11,0x11},
-/* 3 */ {0x03,0x13,0x23,0x33,0x43,0x53,0x63,0x11,0x11,0x93,0xA3,0xB3,0xC3,0xD3},
-/* 4 */ {0x04,0x14,0x24,0x34,0x44,0x54,0x64,0x11,0x11,0x94,0xA4,0xB4,0xC4,0xD4},
-/* 5 */ {0x00,0x15,0x25,0x35,0x45,0x55,0x65,0x11,0x11,0x95,0xA5,0xB5,0xC5,0xD5},
-/* 6 */ {0x06,0x16,0x26,0x36,0x46,0x56,0x66,0x11,0x11,0x96,0xA6,0xB6,0xC6,0xD6},
-/* 7 */ {0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11},
-/* 8 */ {0x08,0x11,0x28,0x38,0x48,0x58,0x68,0x11,0x11,0x98,0xA8,0xB8,0xC8,0xD8},
-/* 9 */ {0x09,0x19,0x29,0x39,0x49,0x59,0x69,0x11,0x11,0x99,0xA9,0xB9,0xC9,0xD9}
-};
-
-#ifndef CM4000_DEBUG
-#define	xoutb	outb
-#define	xinb	inb
-#else
-static inline void xoutb(unsigned char val, unsigned short port)
-{
-	pr_debug("outb(val=%.2x,port=%.4x)\n", val, port);
-	outb(val, port);
-}
-static inline unsigned char xinb(unsigned short port)
-{
-	unsigned char val;
-
-	val = inb(port);
-	pr_debug("%.2x=inb(%.4x)\n", val, port);
-
-	return val;
-}
-#endif
-
-static inline unsigned char invert_revert(unsigned char ch)
-{
-	return bitrev8(~ch);
-}
-
-static void str_invert_revert(unsigned char *b, int len)
-{
-	int i;
-
-	for (i = 0; i < len; i++)
-		b[i] = invert_revert(b[i]);
-}
-
-#define	ATRLENCK(dev,pos) \
-	if (pos>=dev->atr_len || pos>=MAX_ATR) \
-		goto return_0;
-
-static unsigned int calc_baudv(unsigned char fidi)
-{
-	unsigned int wcrcf, wbrcf, fi_rfu, di_rfu;
-
-	fi_rfu = 372;
-	di_rfu = 1;
-
-	/* FI */
-	switch ((fidi >> 4) & 0x0F) {
-	case 0x00:
-		wcrcf = 372;
-		break;
-	case 0x01:
-		wcrcf = 372;
-		break;
-	case 0x02:
-		wcrcf = 558;
-		break;
-	case 0x03:
-		wcrcf = 744;
-		break;
-	case 0x04:
-		wcrcf = 1116;
-		break;
-	case 0x05:
-		wcrcf = 1488;
-		break;
-	case 0x06:
-		wcrcf = 1860;
-		break;
-	case 0x07:
-		wcrcf = fi_rfu;
-		break;
-	case 0x08:
-		wcrcf = fi_rfu;
-		break;
-	case 0x09:
-		wcrcf = 512;
-		break;
-	case 0x0A:
-		wcrcf = 768;
-		break;
-	case 0x0B:
-		wcrcf = 1024;
-		break;
-	case 0x0C:
-		wcrcf = 1536;
-		break;
-	case 0x0D:
-		wcrcf = 2048;
-		break;
-	default:
-		wcrcf = fi_rfu;
-		break;
-	}
-
-	/* DI */
-	switch (fidi & 0x0F) {
-	case 0x00:
-		wbrcf = di_rfu;
-		break;
-	case 0x01:
-		wbrcf = 1;
-		break;
-	case 0x02:
-		wbrcf = 2;
-		break;
-	case 0x03:
-		wbrcf = 4;
-		break;
-	case 0x04:
-		wbrcf = 8;
-		break;
-	case 0x05:
-		wbrcf = 16;
-		break;
-	case 0x06:
-		wbrcf = 32;
-		break;
-	case 0x07:
-		wbrcf = di_rfu;
-		break;
-	case 0x08:
-		wbrcf = 12;
-		break;
-	case 0x09:
-		wbrcf = 20;
-		break;
-	default:
-		wbrcf = di_rfu;
-		break;
-	}
-
-	return (wcrcf / wbrcf);
-}
-
-static unsigned short io_read_num_rec_bytes(unsigned int iobase,
-					    unsigned short *s)
-{
-	unsigned short tmp;
-
-	tmp = *s = 0;
-	do {
-		*s = tmp;
-		tmp = inb(REG_NUM_BYTES(iobase)) |
-				(inb(REG_FLAGS0(iobase)) & 4 ? 0x100 : 0);
-	} while (tmp != *s);
-
-	return *s;
-}
-
-static int parse_atr(struct cm4000_dev *dev)
-{
-	unsigned char any_t1, any_t0;
-	unsigned char ch, ifno;
-	int ix, done;
-
-	DEBUGP(3, dev, "-> parse_atr: dev->atr_len = %i\n", dev->atr_len);
-
-	if (dev->atr_len < 3) {
-		DEBUGP(5, dev, "parse_atr: atr_len < 3\n");
-		return 0;
-	}
-
-	if (dev->atr[0] == 0x3f)
-		set_bit(IS_INVREV, &dev->flags);
-	else
-		clear_bit(IS_INVREV, &dev->flags);
-	ix = 1;
-	ifno = 1;
-	ch = dev->atr[1];
-	dev->proto = 0;		/* XXX PROTO */
-	any_t1 = any_t0 = done = 0;
-	dev->ta1 = 0x11;	/* defaults to 9600 baud */
-	do {
-		if (ifno == 1 && (ch & 0x10)) {
-			/* read first interface byte and TA1 is present */
-			dev->ta1 = dev->atr[2];
-			DEBUGP(5, dev, "Card says FiDi is 0x%.2x\n", dev->ta1);
-			ifno++;
-		} else if ((ifno == 2) && (ch & 0x10)) { /* TA(2) */
-			dev->ta1 = 0x11;
-			ifno++;
-		}
-
-		DEBUGP(5, dev, "Yi=%.2x\n", ch & 0xf0);
-		ix += ((ch & 0x10) >> 4)	/* no of int.face chars */
-		    +((ch & 0x20) >> 5)
-		    + ((ch & 0x40) >> 6)
-		    + ((ch & 0x80) >> 7);
-		/* ATRLENCK(dev,ix); */
-		if (ch & 0x80) {	/* TDi */
-			ch = dev->atr[ix];
-			if ((ch & 0x0f)) {
-				any_t1 = 1;
-				DEBUGP(5, dev, "card is capable of T=1\n");
-			} else {
-				any_t0 = 1;
-				DEBUGP(5, dev, "card is capable of T=0\n");
-			}
-		} else
-			done = 1;
-	} while (!done);
-
-	DEBUGP(5, dev, "ix=%d noHist=%d any_t1=%d\n",
-	      ix, dev->atr[1] & 15, any_t1);
-	if (ix + 1 + (dev->atr[1] & 0x0f) + any_t1 != dev->atr_len) {
-		DEBUGP(5, dev, "length error\n");
-		return 0;
-	}
-	if (any_t0)
-		set_bit(IS_ANY_T0, &dev->flags);
-
-	if (any_t1) {		/* compute csum */
-		dev->atr_csum = 0;
-#ifdef ATR_CSUM
-		for (i = 1; i < dev->atr_len; i++)
-			dev->atr_csum ^= dev->atr[i];
-		if (dev->atr_csum) {
-			set_bit(IS_BAD_CSUM, &dev->flags);
-			DEBUGP(5, dev, "bad checksum\n");
-			goto return_0;
-		}
-#endif
-		if (any_t0 == 0)
-			dev->proto = 1;	/* XXX PROTO */
-		set_bit(IS_ANY_T1, &dev->flags);
-	}
-
-	return 1;
-}
-
-struct card_fixup {
-	char atr[12];
-	u_int8_t atr_len;
-	u_int8_t stopbits;
-};
-
-static struct card_fixup card_fixups[] = {
-	{	/* ACOS */
-		.atr = { 0x3b, 0xb3, 0x11, 0x00, 0x00, 0x41, 0x01 },
-		.atr_len = 7,
-		.stopbits = 0x03,
-	},
-	{	/* Motorola */
-		.atr = {0x3b, 0x76, 0x13, 0x00, 0x00, 0x80, 0x62, 0x07,
-			0x41, 0x81, 0x81 },
-		.atr_len = 11,
-		.stopbits = 0x04,
-	},
-};
-
-static void set_cardparameter(struct cm4000_dev *dev)
-{
-	int i;
-	unsigned int iobase = dev->p_dev->resource[0]->start;
-	u_int8_t stopbits = 0x02; /* ISO default */
-
-	DEBUGP(3, dev, "-> set_cardparameter\n");
-
-	dev->flags1 = dev->flags1 | (((dev->baudv - 1) & 0x0100) >> 8);
-	xoutb(dev->flags1, REG_FLAGS1(iobase));
-	DEBUGP(5, dev, "flags1 = 0x%02x\n", dev->flags1);
-
-	/* set baudrate */
-	xoutb((unsigned char)((dev->baudv - 1) & 0xFF), REG_BAUDRATE(iobase));
-
-	DEBUGP(5, dev, "baudv = %i -> write 0x%02x\n", dev->baudv,
-	      ((dev->baudv - 1) & 0xFF));
-
-	/* set stopbits */
-	for (i = 0; i < ARRAY_SIZE(card_fixups); i++) {
-		if (!memcmp(dev->atr, card_fixups[i].atr,
-			    card_fixups[i].atr_len))
-			stopbits = card_fixups[i].stopbits;
-	}
-	xoutb(stopbits, REG_STOPBITS(iobase));
-
-	DEBUGP(3, dev, "<- set_cardparameter\n");
-}
-
-static int set_protocol(struct cm4000_dev *dev, struct ptsreq *ptsreq)
-{
-
-	unsigned long tmp, i;
-	unsigned short num_bytes_read;
-	unsigned char pts_reply[4];
-	ssize_t rc;
-	unsigned int iobase = dev->p_dev->resource[0]->start;
-
-	rc = 0;
-
-	DEBUGP(3, dev, "-> set_protocol\n");
-	DEBUGP(5, dev, "ptsreq->Protocol = 0x%.8x, ptsreq->Flags=0x%.8x, "
-		 "ptsreq->pts1=0x%.2x, ptsreq->pts2=0x%.2x, "
-		 "ptsreq->pts3=0x%.2x\n", (unsigned int)ptsreq->protocol,
-		 (unsigned int)ptsreq->flags, ptsreq->pts1, ptsreq->pts2,
-		 ptsreq->pts3);
-
-	/* Fill PTS structure */
-	dev->pts[0] = 0xff;
-	dev->pts[1] = 0x00;
-	tmp = ptsreq->protocol;
-	while ((tmp = (tmp >> 1)) > 0)
-		dev->pts[1]++;
-	dev->proto = dev->pts[1];	/* Set new protocol */
-	dev->pts[1] = (0x01 << 4) | (dev->pts[1]);
-
-	/* Correct Fi/Di according to CM4000 Fi/Di table */
-	DEBUGP(5, dev, "Ta(1) from ATR is 0x%.2x\n", dev->ta1);
-	/* set Fi/Di according to ATR TA(1) */
-	dev->pts[2] = fi_di_table[dev->ta1 & 0x0F][(dev->ta1 >> 4) & 0x0F];
-
-	/* Calculate PCK character */
-	dev->pts[3] = dev->pts[0] ^ dev->pts[1] ^ dev->pts[2];
-
-	DEBUGP(5, dev, "pts0=%.2x, pts1=%.2x, pts2=%.2x, pts3=%.2x\n",
-	       dev->pts[0], dev->pts[1], dev->pts[2], dev->pts[3]);
-
-	/* check card convention */
-	if (test_bit(IS_INVREV, &dev->flags))
-		str_invert_revert(dev->pts, 4);
-
-	/* reset SM */
-	xoutb(0x80, REG_FLAGS0(iobase));
-
-	/* Enable access to the message buffer */
-	DEBUGP(5, dev, "Enable access to the messages buffer\n");
-	dev->flags1 = 0x20	/* T_Active */
-	    | (test_bit(IS_INVREV, &dev->flags) ? 0x02 : 0x00) /* inv parity */
-	    | ((dev->baudv >> 8) & 0x01);	/* MSB-baud */
-	xoutb(dev->flags1, REG_FLAGS1(iobase));
-
-	DEBUGP(5, dev, "Enable message buffer -> flags1 = 0x%.2x\n",
-	       dev->flags1);
-
-	/* write challenge to the buffer */
-	DEBUGP(5, dev, "Write challenge to buffer: ");
-	for (i = 0; i < 4; i++) {
-		xoutb(i, REG_BUF_ADDR(iobase));
-		xoutb(dev->pts[i], REG_BUF_DATA(iobase));	/* buf data */
-#ifdef CM4000_DEBUG
-		pr_debug("0x%.2x ", dev->pts[i]);
-	}
-	pr_debug("\n");
-#else
-	}
-#endif
-
-	/* set number of bytes to write */
-	DEBUGP(5, dev, "Set number of bytes to write\n");
-	xoutb(0x04, REG_NUM_SEND(iobase));
-
-	/* Trigger CARDMAN CONTROLLER */
-	xoutb(0x50, REG_FLAGS0(iobase));
-
-	/* Monitor progress */
-	/* wait for xmit done */
-	DEBUGP(5, dev, "Waiting for NumRecBytes getting valid\n");
-
-	for (i = 0; i < 100; i++) {
-		if (inb(REG_FLAGS0(iobase)) & 0x08) {
-			DEBUGP(5, dev, "NumRecBytes is valid\n");
-			break;
-		}
-		/* can not sleep as this is in atomic context */
-		mdelay(10);
-	}
-	if (i == 100) {
-		DEBUGP(5, dev, "Timeout waiting for NumRecBytes getting "
-		       "valid\n");
-		rc = -EIO;
-		goto exit_setprotocol;
-	}
-
-	DEBUGP(5, dev, "Reading NumRecBytes\n");
-	for (i = 0; i < 100; i++) {
-		io_read_num_rec_bytes(iobase, &num_bytes_read);
-		if (num_bytes_read >= 4) {
-			DEBUGP(2, dev, "NumRecBytes = %i\n", num_bytes_read);
-			if (num_bytes_read > 4) {
-				rc = -EIO;
-				goto exit_setprotocol;
-			}
-			break;
-		}
-		/* can not sleep as this is in atomic context */
-		mdelay(10);
-	}
-
-	/* check whether it is a short PTS reply? */
-	if (num_bytes_read == 3)
-		i = 0;
-
-	if (i == 100) {
-		DEBUGP(5, dev, "Timeout reading num_bytes_read\n");
-		rc = -EIO;
-		goto exit_setprotocol;
-	}
-
-	DEBUGP(5, dev, "Reset the CARDMAN CONTROLLER\n");
-	xoutb(0x80, REG_FLAGS0(iobase));
-
-	/* Read PPS reply */
-	DEBUGP(5, dev, "Read PPS reply\n");
-	for (i = 0; i < num_bytes_read; i++) {
-		xoutb(i, REG_BUF_ADDR(iobase));
-		pts_reply[i] = inb(REG_BUF_DATA(iobase));
-	}
-
-#ifdef CM4000_DEBUG
-	DEBUGP(2, dev, "PTSreply: ");
-	for (i = 0; i < num_bytes_read; i++) {
-		pr_debug("0x%.2x ", pts_reply[i]);
-	}
-	pr_debug("\n");
-#endif	/* CM4000_DEBUG */
-
-	DEBUGP(5, dev, "Clear Tactive in Flags1\n");
-	xoutb(0x20, REG_FLAGS1(iobase));
-
-	/* Compare ptsreq and ptsreply */
-	if ((dev->pts[0] == pts_reply[0]) &&
-	    (dev->pts[1] == pts_reply[1]) &&
-	    (dev->pts[2] == pts_reply[2]) && (dev->pts[3] == pts_reply[3])) {
-		/* setcardparameter according to PPS */
-		dev->baudv = calc_baudv(dev->pts[2]);
-		set_cardparameter(dev);
-	} else if ((dev->pts[0] == pts_reply[0]) &&
-		   ((dev->pts[1] & 0xef) == pts_reply[1]) &&
-		   ((pts_reply[0] ^ pts_reply[1]) == pts_reply[2])) {
-		/* short PTS reply, set card parameter to default values */
-		dev->baudv = calc_baudv(0x11);
-		set_cardparameter(dev);
-	} else
-		rc = -EIO;
-
-exit_setprotocol:
-	DEBUGP(3, dev, "<- set_protocol\n");
-	return rc;
-}
-
-static int io_detect_cm4000(unsigned int iobase, struct cm4000_dev *dev)
-{
-
-	/* note: statemachine is assumed to be reset */
-	if (inb(REG_FLAGS0(iobase)) & 8) {
-		clear_bit(IS_ATR_VALID, &dev->flags);
-		set_bit(IS_CMM_ABSENT, &dev->flags);
-		return 0;	/* detect CMM = 1 -> failure */
-	}
-	/* xoutb(0x40, REG_FLAGS1(iobase)); detectCMM */
-	xoutb(dev->flags1 | 0x40, REG_FLAGS1(iobase));
-	if ((inb(REG_FLAGS0(iobase)) & 8) == 0) {
-		clear_bit(IS_ATR_VALID, &dev->flags);
-		set_bit(IS_CMM_ABSENT, &dev->flags);
-		return 0;	/* detect CMM=0 -> failure */
-	}
-	/* clear detectCMM again by restoring original flags1 */
-	xoutb(dev->flags1, REG_FLAGS1(iobase));
-	return 1;
-}
-
-static void terminate_monitor(struct cm4000_dev *dev)
-{
-
-	/* tell the monitor to stop and wait until
-	 * it terminates.
-	 */
-	DEBUGP(3, dev, "-> terminate_monitor\n");
-	wait_event_interruptible(dev->devq,
-				 test_and_set_bit(LOCK_MONITOR,
-						  (void *)&dev->flags));
-
-	/* now, LOCK_MONITOR has been set.
-	 * allow a last cycle in the monitor.
-	 * the monitor will indicate that it has
-	 * finished by clearing this bit.
-	 */
-	DEBUGP(5, dev, "Now allow last cycle of monitor!\n");
-	while (test_bit(LOCK_MONITOR, (void *)&dev->flags))
-		msleep(25);
-
-	DEBUGP(5, dev, "Delete timer\n");
-	del_timer_sync(&dev->timer);
-#ifdef CM4000_DEBUG
-	dev->monitor_running = 0;
-#endif
-
-	DEBUGP(3, dev, "<- terminate_monitor\n");
-}
-
-/*
- * monitor the card every 50msec. as a side-effect, retrieve the
- * atr once a card is inserted. another side-effect of retrieving the
- * atr is that the card will be powered on, so there is no need to
- * power on the card explicitly from the application: the driver
- * is already doing that for you.
- */
-
-static void monitor_card(struct timer_list *t)
-{
-	struct cm4000_dev *dev = from_timer(dev, t, timer);
-	unsigned int iobase = dev->p_dev->resource[0]->start;
-	unsigned short s;
-	struct ptsreq ptsreq;
-	int i, atrc;
-
-	DEBUGP(7, dev, "->  monitor_card\n");
-
-	/* if someone has set the lock for us: we're done! */
-	if (test_and_set_bit(LOCK_MONITOR, &dev->flags)) {
-		DEBUGP(4, dev, "About to stop monitor\n");
-		/* no */
-		dev->rlen =
-		    dev->rpos =
-		    dev->atr_csum = dev->atr_len_retry = dev->cwarn = 0;
-		dev->mstate = M_FETCH_ATR;
-		clear_bit(LOCK_MONITOR, &dev->flags);
-		/* close et al. are sleeping on devq, so wake it */
-		wake_up_interruptible(&dev->devq);
-		DEBUGP(2, dev, "<- monitor_card (we are done now)\n");
-		return;
-	}
-
-	/* try to lock io: if it is already locked, just add another timer */
-	if (test_and_set_bit(LOCK_IO, (void *)&dev->flags)) {
-		DEBUGP(4, dev, "Couldn't get IO lock\n");
-		goto return_with_timer;
-	}
-
-	/* is a card/a reader inserted at all ? */
-	dev->flags0 = xinb(REG_FLAGS0(iobase));
-	DEBUGP(7, dev, "dev->flags0 = 0x%2x\n", dev->flags0);
-	DEBUGP(7, dev, "smartcard present: %s\n",
-	       dev->flags0 & 1 ? "yes" : "no");
-	DEBUGP(7, dev, "cardman present: %s\n",
-	       dev->flags0 == 0xff ? "no" : "yes");
-
-	if ((dev->flags0 & 1) == 0	/* no smartcard inserted */
-	    || dev->flags0 == 0xff) {	/* no cardman inserted */
-		/* no */
-		dev->rlen =
-		    dev->rpos =
-		    dev->atr_csum = dev->atr_len_retry = dev->cwarn = 0;
-		dev->mstate = M_FETCH_ATR;
-
-		dev->flags &= 0x000000ff; /* only keep IO and MONITOR locks */
-
-		if (dev->flags0 == 0xff) {
-			DEBUGP(4, dev, "set IS_CMM_ABSENT bit\n");
-			set_bit(IS_CMM_ABSENT, &dev->flags);
-		} else if (test_bit(IS_CMM_ABSENT, &dev->flags)) {
-			DEBUGP(4, dev, "clear IS_CMM_ABSENT bit "
-			       "(card is removed)\n");
-			clear_bit(IS_CMM_ABSENT, &dev->flags);
-		}
-
-		goto release_io;
-	} else if ((dev->flags0 & 1) && test_bit(IS_CMM_ABSENT, &dev->flags)) {
-		/* cardman and card present but cardman was absent before
-		 * (after suspend with inserted card) */
-		DEBUGP(4, dev, "clear IS_CMM_ABSENT bit (card is inserted)\n");
-		clear_bit(IS_CMM_ABSENT, &dev->flags);
-	}
-
-	if (test_bit(IS_ATR_VALID, &dev->flags) == 1) {
-		DEBUGP(7, dev, "believe ATR is already valid (do nothing)\n");
-		goto release_io;
-	}
-
-	switch (dev->mstate) {
-	case M_CARDOFF: {
-		unsigned char flags0;
-
-		DEBUGP(4, dev, "M_CARDOFF\n");
-		flags0 = inb(REG_FLAGS0(iobase));
-		if (flags0 & 0x02) {
-			/* wait until Flags0 indicate power is off */
-			dev->mdelay = T_10MSEC;
-		} else {
-			/* Flags0 indicate power off and no card inserted now;
-			 * Reset CARDMAN CONTROLLER */
-			xoutb(0x80, REG_FLAGS0(iobase));
-
-			/* prepare for fetching ATR again: after card off ATR
-			 * is read again automatically */
-			dev->rlen =
-			    dev->rpos =
-			    dev->atr_csum =
-			    dev->atr_len_retry = dev->cwarn = 0;
-			dev->mstate = M_FETCH_ATR;
-
-			/* minimal gap between CARDOFF and read ATR is 50msec */
-			dev->mdelay = T_50MSEC;
-		}
-		break;
-	}
-	case M_FETCH_ATR:
-		DEBUGP(4, dev, "M_FETCH_ATR\n");
-		xoutb(0x80, REG_FLAGS0(iobase));
-		DEBUGP(4, dev, "Reset BAUDV to 9600\n");
-		dev->baudv = 0x173;	/* 9600 */
-		xoutb(0x02, REG_STOPBITS(iobase));	/* stopbits=2 */
-		xoutb(0x73, REG_BAUDRATE(iobase));	/* baud value */
-		xoutb(0x21, REG_FLAGS1(iobase));	/* T_Active=1, baud
-							   value */
-		/* warm start vs. power on: */
-		xoutb(dev->flags0 & 2 ? 0x46 : 0x44, REG_FLAGS0(iobase));
-		dev->mdelay = T_40MSEC;
-		dev->mstate = M_TIMEOUT_WAIT;
-		break;
-	case M_TIMEOUT_WAIT:
-		DEBUGP(4, dev, "M_TIMEOUT_WAIT\n");
-		/* numRecBytes */
-		io_read_num_rec_bytes(iobase, &dev->atr_len);
-		dev->mdelay = T_10MSEC;
-		dev->mstate = M_READ_ATR_LEN;
-		break;
-	case M_READ_ATR_LEN:
-		DEBUGP(4, dev, "M_READ_ATR_LEN\n");
-		/* infinite loop possible, since there is no timeout */
-
-#define	MAX_ATR_LEN_RETRY	100
-
-		if (dev->atr_len == io_read_num_rec_bytes(iobase, &s)) {
-			if (dev->atr_len_retry++ >= MAX_ATR_LEN_RETRY) {					/* + XX msec */
-				dev->mdelay = T_10MSEC;
-				dev->mstate = M_READ_ATR;
-			}
-		} else {
-			dev->atr_len = s;
-			dev->atr_len_retry = 0;	/* set new timeout */
-		}
-
-		DEBUGP(4, dev, "Current ATR_LEN = %i\n", dev->atr_len);
-		break;
-	case M_READ_ATR:
-		DEBUGP(4, dev, "M_READ_ATR\n");
-		xoutb(0x80, REG_FLAGS0(iobase));	/* reset SM */
-		for (i = 0; i < dev->atr_len; i++) {
-			xoutb(i, REG_BUF_ADDR(iobase));
-			dev->atr[i] = inb(REG_BUF_DATA(iobase));
-		}
-		/* Deactivate T_Active flags */
-		DEBUGP(4, dev, "Deactivate T_Active flags\n");
-		dev->flags1 = 0x01;
-		xoutb(dev->flags1, REG_FLAGS1(iobase));
-
-		/* atr is present (which doesn't mean it's valid) */
-		set_bit(IS_ATR_PRESENT, &dev->flags);
-		if (dev->atr[0] == 0x03)
-			str_invert_revert(dev->atr, dev->atr_len);
-		atrc = parse_atr(dev);
-		if (atrc == 0) {	/* atr invalid */
-			dev->mdelay = 0;
-			dev->mstate = M_BAD_CARD;
-		} else {
-			dev->mdelay = T_50MSEC;
-			dev->mstate = M_ATR_PRESENT;
-			set_bit(IS_ATR_VALID, &dev->flags);
-		}
-
-		if (test_bit(IS_ATR_VALID, &dev->flags) == 1) {
-			DEBUGP(4, dev, "monitor_card: ATR valid\n");
- 			/* if ta1 == 0x11, no PPS necessary (default values) */
-			/* do not do PPS with multi protocol cards */
-			if ((test_bit(IS_AUTOPPS_ACT, &dev->flags) == 0) &&
-			    (dev->ta1 != 0x11) &&
-			    !(test_bit(IS_ANY_T0, &dev->flags) &&
-			    test_bit(IS_ANY_T1, &dev->flags))) {
-				DEBUGP(4, dev, "Perform AUTOPPS\n");
-				set_bit(IS_AUTOPPS_ACT, &dev->flags);
-				ptsreq.protocol = (0x01 << dev->proto);
-				ptsreq.flags = 0x01;
-				ptsreq.pts1 = 0x00;
-				ptsreq.pts2 = 0x00;
-				ptsreq.pts3 = 0x00;
-				if (set_protocol(dev, &ptsreq) == 0) {
-					DEBUGP(4, dev, "AUTOPPS ret SUCC\n");
-					clear_bit(IS_AUTOPPS_ACT, &dev->flags);
-					wake_up_interruptible(&dev->atrq);
-				} else {
-					DEBUGP(4, dev, "AUTOPPS failed: "
-					       "repower using defaults\n");
-					/* prepare for repowering  */
-					clear_bit(IS_ATR_PRESENT, &dev->flags);
-					clear_bit(IS_ATR_VALID, &dev->flags);
-					dev->rlen =
-					    dev->rpos =
-					    dev->atr_csum =
-					    dev->atr_len_retry = dev->cwarn = 0;
-					dev->mstate = M_FETCH_ATR;
-
-					dev->mdelay = T_50MSEC;
-				}
-			} else {
-				/* for cards which use slightly different
-				 * params (extra guard time) */
-				set_cardparameter(dev);
-				if (test_bit(IS_AUTOPPS_ACT, &dev->flags) == 1)
-					DEBUGP(4, dev, "AUTOPPS already active "
-					       "2nd try:use default values\n");
-				if (dev->ta1 == 0x11)
-					DEBUGP(4, dev, "No AUTOPPS necessary "
-					       "TA(1)==0x11\n");
-				if (test_bit(IS_ANY_T0, &dev->flags)
-				    && test_bit(IS_ANY_T1, &dev->flags))
-					DEBUGP(4, dev, "Do NOT perform AUTOPPS "
-					       "with multiprotocol cards\n");
-				clear_bit(IS_AUTOPPS_ACT, &dev->flags);
-				wake_up_interruptible(&dev->atrq);
-			}
-		} else {
-			DEBUGP(4, dev, "ATR invalid\n");
-			wake_up_interruptible(&dev->atrq);
-		}
-		break;
-	case M_BAD_CARD:
-		DEBUGP(4, dev, "M_BAD_CARD\n");
-		/* slow down warning, but prompt immediately after insertion */
-		if (dev->cwarn == 0 || dev->cwarn == 10) {
-			set_bit(IS_BAD_CARD, &dev->flags);
-			dev_warn(&dev->p_dev->dev, MODULE_NAME ": ");
-			if (test_bit(IS_BAD_CSUM, &dev->flags)) {
-				DEBUGP(4, dev, "ATR checksum (0x%.2x, should "
-				       "be zero) failed\n", dev->atr_csum);
-			}
-#ifdef CM4000_DEBUG
-			else if (test_bit(IS_BAD_LENGTH, &dev->flags)) {
-				DEBUGP(4, dev, "ATR length error\n");
-			} else {
-				DEBUGP(4, dev, "card damaged or wrong way "
-					"inserted\n");
-			}
-#endif
-			dev->cwarn = 0;
-			wake_up_interruptible(&dev->atrq);	/* wake open */
-		}
-		dev->cwarn++;
-		dev->mdelay = T_100MSEC;
-		dev->mstate = M_FETCH_ATR;
-		break;
-	default:
-		DEBUGP(7, dev, "Unknown action\n");
-		break;		/* nothing */
-	}
-
-release_io:
-	DEBUGP(7, dev, "release_io\n");
-	clear_bit(LOCK_IO, &dev->flags);
-	wake_up_interruptible(&dev->ioq);	/* whoever needs IO */
-
-return_with_timer:
-	DEBUGP(7, dev, "<- monitor_card (returns with timer)\n");
-	mod_timer(&dev->timer, jiffies + dev->mdelay);
-	clear_bit(LOCK_MONITOR, &dev->flags);
-}
-
-/* Interface to userland (file_operations) */
-
-static ssize_t cmm_read(struct file *filp, __user char *buf, size_t count,
-			loff_t *ppos)
-{
-	struct cm4000_dev *dev = filp->private_data;
-	unsigned int iobase = dev->p_dev->resource[0]->start;
-	ssize_t rc;
-	int i, j, k;
-
-	DEBUGP(2, dev, "-> cmm_read(%s,%d)\n", current->comm, current->pid);
-
-	if (count == 0)		/* according to manpage */
-		return 0;
-
-	if (!pcmcia_dev_present(dev->p_dev) || /* device removed */
-	    test_bit(IS_CMM_ABSENT, &dev->flags))
-		return -ENODEV;
-
-	if (test_bit(IS_BAD_CSUM, &dev->flags))
-		return -EIO;
-
-	/* also see the note about this in cmm_write */
-	if (wait_event_interruptible
-	    (dev->atrq,
-	     ((filp->f_flags & O_NONBLOCK)
-	      || (test_bit(IS_ATR_PRESENT, (void *)&dev->flags) != 0)))) {
-		if (filp->f_flags & O_NONBLOCK)
-			return -EAGAIN;
-		return -ERESTARTSYS;
-	}
-
-	if (test_bit(IS_ATR_VALID, &dev->flags) == 0)
-		return -EIO;
-
-	/* this one implements blocking IO */
-	if (wait_event_interruptible
-	    (dev->readq,
-	     ((filp->f_flags & O_NONBLOCK) || (dev->rpos < dev->rlen)))) {
-		if (filp->f_flags & O_NONBLOCK)
-			return -EAGAIN;
-		return -ERESTARTSYS;
-	}
-
-	/* lock io */
-	if (wait_event_interruptible
-	    (dev->ioq,
-	     ((filp->f_flags & O_NONBLOCK)
-	      || (test_and_set_bit(LOCK_IO, (void *)&dev->flags) == 0)))) {
-		if (filp->f_flags & O_NONBLOCK)
-			return -EAGAIN;
-		return -ERESTARTSYS;
-	}
-
-	rc = 0;
-	dev->flags0 = inb(REG_FLAGS0(iobase));
-	if ((dev->flags0 & 1) == 0	/* no smartcard inserted */
-	    || dev->flags0 == 0xff) {	/* no cardman inserted */
-		clear_bit(IS_ATR_VALID, &dev->flags);
-		if (dev->flags0 & 1) {
-			set_bit(IS_CMM_ABSENT, &dev->flags);
-			rc = -ENODEV;
-		} else {
-			rc = -EIO;
-		}
-		goto release_io;
-	}
-
-	DEBUGP(4, dev, "begin read answer\n");
-	j = min(count, (size_t)(dev->rlen - dev->rpos));
-	k = dev->rpos;
-	if (k + j > 255)
-		j = 256 - k;
-	DEBUGP(4, dev, "read1 j=%d\n", j);
-	for (i = 0; i < j; i++) {
-		xoutb(k++, REG_BUF_ADDR(iobase));
-		dev->rbuf[i] = xinb(REG_BUF_DATA(iobase));
-	}
-	j = min(count, (size_t)(dev->rlen - dev->rpos));
-	if (k + j > 255) {
-		DEBUGP(4, dev, "read2 j=%d\n", j);
-		dev->flags1 |= 0x10;	/* MSB buf addr set */
-		xoutb(dev->flags1, REG_FLAGS1(iobase));
-		for (; i < j; i++) {
-			xoutb(k++, REG_BUF_ADDR(iobase));
-			dev->rbuf[i] = xinb(REG_BUF_DATA(iobase));
-		}
-	}
-
-	if (dev->proto == 0 && count > dev->rlen - dev->rpos && i) {
-		DEBUGP(4, dev, "T=0 and count > buffer\n");
-		dev->rbuf[i] = dev->rbuf[i - 1];
-		dev->rbuf[i - 1] = dev->procbyte;
-		j++;
-	}
-	count = j;
-
-	dev->rpos = dev->rlen + 1;
-
-	/* Clear T1Active */
-	DEBUGP(4, dev, "Clear T1Active\n");
-	dev->flags1 &= 0xdf;
-	xoutb(dev->flags1, REG_FLAGS1(iobase));
-
-	xoutb(0, REG_FLAGS1(iobase));	/* clear detectCMM */
-	/* last check before exit */
-	if (!io_detect_cm4000(iobase, dev)) {
-		rc = -ENODEV;
-		goto release_io;
-	}
-
-	if (test_bit(IS_INVREV, &dev->flags) && count > 0)
-		str_invert_revert(dev->rbuf, count);
-
-	if (copy_to_user(buf, dev->rbuf, count))
-		rc = -EFAULT;
-
-release_io:
-	clear_bit(LOCK_IO, &dev->flags);
-	wake_up_interruptible(&dev->ioq);
-
-	DEBUGP(2, dev, "<- cmm_read returns: rc = %zi\n",
-	       (rc < 0 ? rc : count));
-	return rc < 0 ? rc : count;
-}
-
-static ssize_t cmm_write(struct file *filp, const char __user *buf,
-			 size_t count, loff_t *ppos)
-{
-	struct cm4000_dev *dev = filp->private_data;
-	unsigned int iobase = dev->p_dev->resource[0]->start;
-	unsigned short s;
-	unsigned char infolen;
-	unsigned char sendT0;
-	unsigned short nsend;
-	unsigned short nr;
-	ssize_t rc;
-	int i;
-
-	DEBUGP(2, dev, "-> cmm_write(%s,%d)\n", current->comm, current->pid);
-
-	if (count == 0)		/* according to manpage */
-		return 0;
-
-	if (dev->proto == 0 && count < 4) {
-		/* T0 must have at least 4 bytes */
-		DEBUGP(4, dev, "T0 short write\n");
-		return -EIO;
-	}
-
-	nr = count & 0x1ff;	/* max bytes to write */
-
-	sendT0 = dev->proto ? 0 : nr > 5 ? 0x08 : 0;
-
-	if (!pcmcia_dev_present(dev->p_dev) || /* device removed */
-	    test_bit(IS_CMM_ABSENT, &dev->flags))
-		return -ENODEV;
-
-	if (test_bit(IS_BAD_CSUM, &dev->flags)) {
-		DEBUGP(4, dev, "bad csum\n");
-		return -EIO;
-	}
-
-	/*
-	 * wait for atr to become valid.
-	 * note: it is important to lock this code. if we dont, the monitor
-	 * could be run between test_bit and the call to sleep on the
-	 * atr-queue.  if *then* the monitor detects atr valid, it will wake up
-	 * any process on the atr-queue, *but* since we have been interrupted,
-	 * we do not yet sleep on this queue. this would result in a missed
-	 * wake_up and the calling process would sleep forever (until
-	 * interrupted).  also, do *not* restore_flags before sleep_on, because
-	 * this could result in the same situation!
-	 */
-	if (wait_event_interruptible
-	    (dev->atrq,
-	     ((filp->f_flags & O_NONBLOCK)
-	      || (test_bit(IS_ATR_PRESENT, (void *)&dev->flags) != 0)))) {
-		if (filp->f_flags & O_NONBLOCK)
-			return -EAGAIN;
-		return -ERESTARTSYS;
-	}
-
-	if (test_bit(IS_ATR_VALID, &dev->flags) == 0) {	/* invalid atr */
-		DEBUGP(4, dev, "invalid ATR\n");
-		return -EIO;
-	}
-
-	/* lock io */
-	if (wait_event_interruptible
-	    (dev->ioq,
-	     ((filp->f_flags & O_NONBLOCK)
-	      || (test_and_set_bit(LOCK_IO, (void *)&dev->flags) == 0)))) {
-		if (filp->f_flags & O_NONBLOCK)
-			return -EAGAIN;
-		return -ERESTARTSYS;
-	}
-
-	if (copy_from_user(dev->sbuf, buf, ((count > 512) ? 512 : count)))
-		return -EFAULT;
-
-	rc = 0;
-	dev->flags0 = inb(REG_FLAGS0(iobase));
-	if ((dev->flags0 & 1) == 0	/* no smartcard inserted */
-	    || dev->flags0 == 0xff) {	/* no cardman inserted */
-		clear_bit(IS_ATR_VALID, &dev->flags);
-		if (dev->flags0 & 1) {
-			set_bit(IS_CMM_ABSENT, &dev->flags);
-			rc = -ENODEV;
-		} else {
-			DEBUGP(4, dev, "IO error\n");
-			rc = -EIO;
-		}
-		goto release_io;
-	}
-
-	xoutb(0x80, REG_FLAGS0(iobase));	/* reset SM  */
-
-	if (!io_detect_cm4000(iobase, dev)) {
-		rc = -ENODEV;
-		goto release_io;
-	}
-
-	/* reflect T=0 send/read mode in flags1 */
-	dev->flags1 |= (sendT0);
-
-	set_cardparameter(dev);
-
-	/* dummy read, reset flag procedure received */
-	inb(REG_FLAGS1(iobase));
-
-	dev->flags1 = 0x20	/* T_Active */
-	    | (sendT0)
-	    | (test_bit(IS_INVREV, &dev->flags) ? 2 : 0)/* inverse parity  */
-	    | (((dev->baudv - 1) & 0x0100) >> 8);	/* MSB-Baud */
-	DEBUGP(1, dev, "set dev->flags1 = 0x%.2x\n", dev->flags1);
-	xoutb(dev->flags1, REG_FLAGS1(iobase));
-
-	/* xmit data */
-	DEBUGP(4, dev, "Xmit data\n");
-	for (i = 0; i < nr; i++) {
-		if (i >= 256) {
-			dev->flags1 = 0x20	/* T_Active */
-			    | (sendT0)	/* SendT0 */
-				/* inverse parity: */
-			    | (test_bit(IS_INVREV, &dev->flags) ? 2 : 0)
-			    | (((dev->baudv - 1) & 0x0100) >> 8) /* MSB-Baud */
-			    | 0x10;	/* set address high */
-			DEBUGP(4, dev, "dev->flags = 0x%.2x - set address "
-			       "high\n", dev->flags1);
-			xoutb(dev->flags1, REG_FLAGS1(iobase));
-		}
-		if (test_bit(IS_INVREV, &dev->flags)) {
-			DEBUGP(4, dev, "Apply inverse convention for 0x%.2x "
-				"-> 0x%.2x\n", (unsigned char)dev->sbuf[i],
-			      invert_revert(dev->sbuf[i]));
-			xoutb(i, REG_BUF_ADDR(iobase));
-			xoutb(invert_revert(dev->sbuf[i]),
-			      REG_BUF_DATA(iobase));
-		} else {
-			xoutb(i, REG_BUF_ADDR(iobase));
-			xoutb(dev->sbuf[i], REG_BUF_DATA(iobase));
-		}
-	}
-	DEBUGP(4, dev, "Xmit done\n");
-
-	if (dev->proto == 0) {
-		/* T=0 proto: 0 byte reply  */
-		if (nr == 4) {
-			DEBUGP(4, dev, "T=0 assumes 0 byte reply\n");
-			xoutb(i, REG_BUF_ADDR(iobase));
-			if (test_bit(IS_INVREV, &dev->flags))
-				xoutb(0xff, REG_BUF_DATA(iobase));
-			else
-				xoutb(0x00, REG_BUF_DATA(iobase));
-		}
-
-		/* numSendBytes */
-		if (sendT0)
-			nsend = nr;
-		else {
-			if (nr == 4)
-				nsend = 5;
-			else {
-				nsend = 5 + (unsigned char)dev->sbuf[4];
-				if (dev->sbuf[4] == 0)
-					nsend += 0x100;
-			}
-		}
-	} else
-		nsend = nr;
-
-	/* T0: output procedure byte */
-	if (test_bit(IS_INVREV, &dev->flags)) {
-		DEBUGP(4, dev, "T=0 set Procedure byte (inverse-reverse) "
-		       "0x%.2x\n", invert_revert(dev->sbuf[1]));
-		xoutb(invert_revert(dev->sbuf[1]), REG_NUM_BYTES(iobase));
-	} else {
-		DEBUGP(4, dev, "T=0 set Procedure byte 0x%.2x\n", dev->sbuf[1]);
-		xoutb(dev->sbuf[1], REG_NUM_BYTES(iobase));
-	}
-
-	DEBUGP(1, dev, "set NumSendBytes = 0x%.2x\n",
-	       (unsigned char)(nsend & 0xff));
-	xoutb((unsigned char)(nsend & 0xff), REG_NUM_SEND(iobase));
-
-	DEBUGP(1, dev, "Trigger CARDMAN CONTROLLER (0x%.2x)\n",
-	       0x40	/* SM_Active */
-	      | (dev->flags0 & 2 ? 0 : 4)	/* power on if needed */
-	      |(dev->proto ? 0x10 : 0x08)	/* T=1/T=0 */
-	      |(nsend & 0x100) >> 8 /* MSB numSendBytes */ );
-	xoutb(0x40		/* SM_Active */
-	      | (dev->flags0 & 2 ? 0 : 4)	/* power on if needed */
-	      |(dev->proto ? 0x10 : 0x08)	/* T=1/T=0 */
-	      |(nsend & 0x100) >> 8,	/* MSB numSendBytes */
-	      REG_FLAGS0(iobase));
-
-	/* wait for xmit done */
-	if (dev->proto == 1) {
-		DEBUGP(4, dev, "Wait for xmit done\n");
-		for (i = 0; i < 1000; i++) {
-			if (inb(REG_FLAGS0(iobase)) & 0x08)
-				break;
-			msleep_interruptible(10);
-		}
-		if (i == 1000) {
-			DEBUGP(4, dev, "timeout waiting for xmit done\n");
-			rc = -EIO;
-			goto release_io;
-		}
-	}
-
-	/* T=1: wait for infoLen */
-
-	infolen = 0;
-	if (dev->proto) {
-		/* wait until infoLen is valid */
-		for (i = 0; i < 6000; i++) {	/* max waiting time of 1 min */
-			io_read_num_rec_bytes(iobase, &s);
-			if (s >= 3) {
-				infolen = inb(REG_FLAGS1(iobase));
-				DEBUGP(4, dev, "infolen=%d\n", infolen);
-				break;
-			}
-			msleep_interruptible(10);
-		}
-		if (i == 6000) {
-			DEBUGP(4, dev, "timeout waiting for infoLen\n");
-			rc = -EIO;
-			goto release_io;
-		}
-	} else
-		clear_bit(IS_PROCBYTE_PRESENT, &dev->flags);
-
-	/* numRecBytes | bit9 of numRecytes */
-	io_read_num_rec_bytes(iobase, &dev->rlen);
-	for (i = 0; i < 600; i++) {	/* max waiting time of 2 sec */
-		if (dev->proto) {
-			if (dev->rlen >= infolen + 4)
-				break;
-		}
-		msleep_interruptible(10);
-		/* numRecBytes | bit9 of numRecytes */
-		io_read_num_rec_bytes(iobase, &s);
-		if (s > dev->rlen) {
-			DEBUGP(1, dev, "NumRecBytes inc (reset timeout)\n");
-			i = 0;	/* reset timeout */
-			dev->rlen = s;
-		}
-		/* T=0: we are done when numRecBytes doesn't
-		 *      increment any more and NoProcedureByte
-		 *      is set and numRecBytes == bytes sent + 6
-		 *      (header bytes + data + 1 for sw2)
-		 *      except when the card replies an error
-		 *      which means, no data will be sent back.
-		 */
-		else if (dev->proto == 0) {
-			if ((inb(REG_BUF_ADDR(iobase)) & 0x80)) {
-				/* no procedure byte received since last read */
-				DEBUGP(1, dev, "NoProcedure byte set\n");
-				/* i=0; */
-			} else {
-				/* procedure byte received since last read */
-				DEBUGP(1, dev, "NoProcedure byte unset "
-					"(reset timeout)\n");
-				dev->procbyte = inb(REG_FLAGS1(iobase));
-				DEBUGP(1, dev, "Read procedure byte 0x%.2x\n",
-				      dev->procbyte);
-				i = 0;	/* resettimeout */
-			}
-			if (inb(REG_FLAGS0(iobase)) & 0x08) {
-				DEBUGP(1, dev, "T0Done flag (read reply)\n");
-				break;
-			}
-		}
-		if (dev->proto)
-			infolen = inb(REG_FLAGS1(iobase));
-	}
-	if (i == 600) {
-		DEBUGP(1, dev, "timeout waiting for numRecBytes\n");
-		rc = -EIO;
-		goto release_io;
-	} else {
-		if (dev->proto == 0) {
-			DEBUGP(1, dev, "Wait for T0Done bit to be  set\n");
-			for (i = 0; i < 1000; i++) {
-				if (inb(REG_FLAGS0(iobase)) & 0x08)
-					break;
-				msleep_interruptible(10);
-			}
-			if (i == 1000) {
-				DEBUGP(1, dev, "timeout waiting for T0Done\n");
-				rc = -EIO;
-				goto release_io;
-			}
-
-			dev->procbyte = inb(REG_FLAGS1(iobase));
-			DEBUGP(4, dev, "Read procedure byte 0x%.2x\n",
-			      dev->procbyte);
-
-			io_read_num_rec_bytes(iobase, &dev->rlen);
-			DEBUGP(4, dev, "Read NumRecBytes = %i\n", dev->rlen);
-
-		}
-	}
-	/* T=1: read offset=zero, T=0: read offset=after challenge */
-	dev->rpos = dev->proto ? 0 : nr == 4 ? 5 : nr > dev->rlen ? 5 : nr;
-	DEBUGP(4, dev, "dev->rlen = %i,  dev->rpos = %i, nr = %i\n",
-	      dev->rlen, dev->rpos, nr);
-
-release_io:
-	DEBUGP(4, dev, "Reset SM\n");
-	xoutb(0x80, REG_FLAGS0(iobase));	/* reset SM */
-
-	if (rc < 0) {
-		DEBUGP(4, dev, "Write failed but clear T_Active\n");
-		dev->flags1 &= 0xdf;
-		xoutb(dev->flags1, REG_FLAGS1(iobase));
-	}
-
-	clear_bit(LOCK_IO, &dev->flags);
-	wake_up_interruptible(&dev->ioq);
-	wake_up_interruptible(&dev->readq);	/* tell read we have data */
-
-	/* ITSEC E2: clear write buffer */
-	memset((char *)dev->sbuf, 0, 512);
-
-	/* return error or actually written bytes */
-	DEBUGP(2, dev, "<- cmm_write\n");
-	return rc < 0 ? rc : nr;
-}
-
-static void start_monitor(struct cm4000_dev *dev)
-{
-	DEBUGP(3, dev, "-> start_monitor\n");
-	if (!dev->monitor_running) {
-		DEBUGP(5, dev, "create, init and add timer\n");
-		timer_setup(&dev->timer, monitor_card, 0);
-		dev->monitor_running = 1;
-		mod_timer(&dev->timer, jiffies);
-	} else
-		DEBUGP(5, dev, "monitor already running\n");
-	DEBUGP(3, dev, "<- start_monitor\n");
-}
-
-static void stop_monitor(struct cm4000_dev *dev)
-{
-	DEBUGP(3, dev, "-> stop_monitor\n");
-	if (dev->monitor_running) {
-		DEBUGP(5, dev, "stopping monitor\n");
-		terminate_monitor(dev);
-		/* reset monitor SM */
-		clear_bit(IS_ATR_VALID, &dev->flags);
-		clear_bit(IS_ATR_PRESENT, &dev->flags);
-	} else
-		DEBUGP(5, dev, "monitor already stopped\n");
-	DEBUGP(3, dev, "<- stop_monitor\n");
-}
-
-static long cmm_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
-{
-	struct cm4000_dev *dev = filp->private_data;
-	unsigned int iobase = dev->p_dev->resource[0]->start;
-	struct inode *inode = file_inode(filp);
-	struct pcmcia_device *link;
-	int rc;
-	void __user *argp = (void __user *)arg;
-#ifdef CM4000_DEBUG
-	char *ioctl_names[CM_IOC_MAXNR + 1] = {
-		[_IOC_NR(CM_IOCGSTATUS)] "CM_IOCGSTATUS",
-		[_IOC_NR(CM_IOCGATR)] "CM_IOCGATR",
-		[_IOC_NR(CM_IOCARDOFF)] "CM_IOCARDOFF",
-		[_IOC_NR(CM_IOCSPTS)] "CM_IOCSPTS",
-		[_IOC_NR(CM_IOSDBGLVL)] "CM4000_DBGLVL",
-	};
-	DEBUGP(3, dev, "cmm_ioctl(device=%d.%d) %s\n", imajor(inode),
-	       iminor(inode), ioctl_names[_IOC_NR(cmd)]);
-#endif
-
-	mutex_lock(&cmm_mutex);
-	rc = -ENODEV;
-	link = dev_table[iminor(inode)];
-	if (!pcmcia_dev_present(link)) {
-		DEBUGP(4, dev, "DEV_OK false\n");
-		goto out;
-	}
-
-	if (test_bit(IS_CMM_ABSENT, &dev->flags)) {
-		DEBUGP(4, dev, "CMM_ABSENT flag set\n");
-		goto out;
-	}
-	rc = -EINVAL;
-
-	if (_IOC_TYPE(cmd) != CM_IOC_MAGIC) {
-		DEBUGP(4, dev, "ioctype mismatch\n");
-		goto out;
-	}
-	if (_IOC_NR(cmd) > CM_IOC_MAXNR) {
-		DEBUGP(4, dev, "iocnr mismatch\n");
-		goto out;
-	}
-	rc = 0;
-
-	switch (cmd) {
-	case CM_IOCGSTATUS:
-		DEBUGP(4, dev, " ... in CM_IOCGSTATUS\n");
-		{
-			int status;
-
-			/* clear other bits, but leave inserted & powered as
-			 * they are */
-			status = dev->flags0 & 3;
-			if (test_bit(IS_ATR_PRESENT, &dev->flags))
-				status |= CM_ATR_PRESENT;
-			if (test_bit(IS_ATR_VALID, &dev->flags))
-				status |= CM_ATR_VALID;
-			if (test_bit(IS_CMM_ABSENT, &dev->flags))
-				status |= CM_NO_READER;
-			if (test_bit(IS_BAD_CARD, &dev->flags))
-				status |= CM_BAD_CARD;
-			if (copy_to_user(argp, &status, sizeof(int)))
-				rc = -EFAULT;
-		}
-		break;
-	case CM_IOCGATR:
-		DEBUGP(4, dev, "... in CM_IOCGATR\n");
-		{
-			struct atreq __user *atreq = argp;
-			int tmp;
-			/* allow nonblocking io and being interrupted */
-			if (wait_event_interruptible
-			    (dev->atrq,
-			     ((filp->f_flags & O_NONBLOCK)
-			      || (test_bit(IS_ATR_PRESENT, (void *)&dev->flags)
-				  != 0)))) {
-				if (filp->f_flags & O_NONBLOCK)
-					rc = -EAGAIN;
-				else
-					rc = -ERESTARTSYS;
-				break;
-			}
-
-			rc = -EFAULT;
-			if (test_bit(IS_ATR_VALID, &dev->flags) == 0) {
-				tmp = -1;
-				if (copy_to_user(&(atreq->atr_len), &tmp,
-						 sizeof(int)))
-					break;
-			} else {
-				if (copy_to_user(atreq->atr, dev->atr,
-						 dev->atr_len))
-					break;
-
-				tmp = dev->atr_len;
-				if (copy_to_user(&(atreq->atr_len), &tmp, sizeof(int)))
-					break;
-			}
-			rc = 0;
-			break;
-		}
-	case CM_IOCARDOFF:
-
-#ifdef CM4000_DEBUG
-		DEBUGP(4, dev, "... in CM_IOCARDOFF\n");
-		if (dev->flags0 & 0x01) {
-			DEBUGP(4, dev, "    Card inserted\n");
-		} else {
-			DEBUGP(2, dev, "    No card inserted\n");
-		}
-		if (dev->flags0 & 0x02) {
-			DEBUGP(4, dev, "    Card powered\n");
-		} else {
-			DEBUGP(2, dev, "    Card not powered\n");
-		}
-#endif
-
-		/* is a card inserted and powered? */
-		if ((dev->flags0 & 0x01) && (dev->flags0 & 0x02)) {
-
-			/* get IO lock */
-			if (wait_event_interruptible
-			    (dev->ioq,
-			     ((filp->f_flags & O_NONBLOCK)
-			      || (test_and_set_bit(LOCK_IO, (void *)&dev->flags)
-				  == 0)))) {
-				if (filp->f_flags & O_NONBLOCK)
-					rc = -EAGAIN;
-				else
-					rc = -ERESTARTSYS;
-				break;
-			}
-			/* Set Flags0 = 0x42 */
-			DEBUGP(4, dev, "Set Flags0=0x42 \n");
-			xoutb(0x42, REG_FLAGS0(iobase));
-			clear_bit(IS_ATR_PRESENT, &dev->flags);
-			clear_bit(IS_ATR_VALID, &dev->flags);
-			dev->mstate = M_CARDOFF;
-			clear_bit(LOCK_IO, &dev->flags);
-			if (wait_event_interruptible
-			    (dev->atrq,
-			     ((filp->f_flags & O_NONBLOCK)
-			      || (test_bit(IS_ATR_VALID, (void *)&dev->flags) !=
-				  0)))) {
-				if (filp->f_flags & O_NONBLOCK)
-					rc = -EAGAIN;
-				else
-					rc = -ERESTARTSYS;
-				break;
-			}
-		}
-		/* release lock */
-		clear_bit(LOCK_IO, &dev->flags);
-		wake_up_interruptible(&dev->ioq);
-
-		rc = 0;
-		break;
-	case CM_IOCSPTS:
-		{
-			struct ptsreq krnptsreq;
-
-			if (copy_from_user(&krnptsreq, argp,
-					   sizeof(struct ptsreq))) {
-				rc = -EFAULT;
-				break;
-			}
-
-			rc = 0;
-			DEBUGP(4, dev, "... in CM_IOCSPTS\n");
-			/* wait for ATR to get valid */
-			if (wait_event_interruptible
-			    (dev->atrq,
-			     ((filp->f_flags & O_NONBLOCK)
-			      || (test_bit(IS_ATR_PRESENT, (void *)&dev->flags)
-				  != 0)))) {
-				if (filp->f_flags & O_NONBLOCK)
-					rc = -EAGAIN;
-				else
-					rc = -ERESTARTSYS;
-				break;
-			}
-			/* get IO lock */
-			if (wait_event_interruptible
-			    (dev->ioq,
-			     ((filp->f_flags & O_NONBLOCK)
-			      || (test_and_set_bit(LOCK_IO, (void *)&dev->flags)
-				  == 0)))) {
-				if (filp->f_flags & O_NONBLOCK)
-					rc = -EAGAIN;
-				else
-					rc = -ERESTARTSYS;
-				break;
-			}
-
-			if ((rc = set_protocol(dev, &krnptsreq)) != 0) {
-				/* auto power_on again */
-				dev->mstate = M_FETCH_ATR;
-				clear_bit(IS_ATR_VALID, &dev->flags);
-			}
-			/* release lock */
-			clear_bit(LOCK_IO, &dev->flags);
-			wake_up_interruptible(&dev->ioq);
-
-		}
-		break;
-#ifdef CM4000_DEBUG
-	case CM_IOSDBGLVL:
-		rc = -ENOTTY;
-		break;
-#endif
-	default:
-		DEBUGP(4, dev, "... in default (unknown IOCTL code)\n");
-		rc = -ENOTTY;
-	}
-out:
-	mutex_unlock(&cmm_mutex);
-	return rc;
-}
-
-static int cmm_open(struct inode *inode, struct file *filp)
-{
-	struct cm4000_dev *dev;
-	struct pcmcia_device *link;
-	int minor = iminor(inode);
-	int ret;
-
-	if (minor >= CM4000_MAX_DEV)
-		return -ENODEV;
-
-	mutex_lock(&cmm_mutex);
-	link = dev_table[minor];
-	if (link == NULL || !pcmcia_dev_present(link)) {
-		ret = -ENODEV;
-		goto out;
-	}
-
-	if (link->open) {
-		ret = -EBUSY;
-		goto out;
-	}
-
-	dev = link->priv;
-	filp->private_data = dev;
-
-	DEBUGP(2, dev, "-> cmm_open(device=%d.%d process=%s,%d)\n",
-	      imajor(inode), minor, current->comm, current->pid);
-
-	/* init device variables, they may be "polluted" after close
-	 * or, the device may never have been closed (i.e. open failed)
-	 */
-
-	ZERO_DEV(dev);
-
-	/* opening will always block since the
-	 * monitor will be started by open, which
-	 * means we have to wait for ATR becoming
-	 * valid = block until valid (or card
-	 * inserted)
-	 */
-	if (filp->f_flags & O_NONBLOCK) {
-		ret = -EAGAIN;
-		goto out;
-	}
-
-	dev->mdelay = T_50MSEC;
-
-	/* start monitoring the cardstatus */
-	start_monitor(dev);
-
-	link->open = 1;		/* only one open per device */
-
-	DEBUGP(2, dev, "<- cmm_open\n");
-	ret = stream_open(inode, filp);
-out:
-	mutex_unlock(&cmm_mutex);
-	return ret;
-}
-
-static int cmm_close(struct inode *inode, struct file *filp)
-{
-	struct cm4000_dev *dev;
-	struct pcmcia_device *link;
-	int minor = iminor(inode);
-
-	if (minor >= CM4000_MAX_DEV)
-		return -ENODEV;
-
-	link = dev_table[minor];
-	if (link == NULL)
-		return -ENODEV;
-
-	dev = link->priv;
-
-	DEBUGP(2, dev, "-> cmm_close(maj/min=%d.%d)\n",
-	       imajor(inode), minor);
-
-	stop_monitor(dev);
-
-	ZERO_DEV(dev);
-
-	link->open = 0;		/* only one open per device */
-	wake_up(&dev->devq);	/* socket removed? */
-
-	DEBUGP(2, dev, "cmm_close\n");
-	return 0;
-}
-
-static void cmm_cm4000_release(struct pcmcia_device * link)
-{
-	struct cm4000_dev *dev = link->priv;
-
-	/* dont terminate the monitor, rather rely on
-	 * close doing that for us.
-	 */
-	DEBUGP(3, dev, "-> cmm_cm4000_release\n");
-	while (link->open) {
-		printk(KERN_INFO MODULE_NAME ": delaying release until "
-		       "process has terminated\n");
-		/* note: don't interrupt us:
-		 * close the applications which own
-		 * the devices _first_ !
-		 */
-		wait_event(dev->devq, (link->open == 0));
-	}
-	/* dev->devq=NULL;	this cannot be zeroed earlier */
-	DEBUGP(3, dev, "<- cmm_cm4000_release\n");
-	return;
-}
-
-/*==== Interface to PCMCIA Layer =======================================*/
-
-static int cm4000_config_check(struct pcmcia_device *p_dev, void *priv_data)
-{
-	return pcmcia_request_io(p_dev);
-}
-
-static int cm4000_config(struct pcmcia_device * link, int devno)
-{
-	link->config_flags |= CONF_AUTO_SET_IO;
-
-	/* read the config-tuples */
-	if (pcmcia_loop_config(link, cm4000_config_check, NULL))
-		goto cs_release;
-
-	if (pcmcia_enable_device(link))
-		goto cs_release;
-
-	return 0;
-
-cs_release:
-	cm4000_release(link);
-	return -ENODEV;
-}
-
-static int cm4000_suspend(struct pcmcia_device *link)
-{
-	struct cm4000_dev *dev;
-
-	dev = link->priv;
-	stop_monitor(dev);
-
-	return 0;
-}
-
-static int cm4000_resume(struct pcmcia_device *link)
-{
-	struct cm4000_dev *dev;
-
-	dev = link->priv;
-	if (link->open)
-		start_monitor(dev);
-
-	return 0;
-}
-
-static void cm4000_release(struct pcmcia_device *link)
-{
-	cmm_cm4000_release(link);	/* delay release until device closed */
-	pcmcia_disable_device(link);
-}
-
-static int cm4000_probe(struct pcmcia_device *link)
-{
-	struct cm4000_dev *dev;
-	int i, ret;
-
-	for (i = 0; i < CM4000_MAX_DEV; i++)
-		if (dev_table[i] == NULL)
-			break;
-
-	if (i == CM4000_MAX_DEV) {
-		printk(KERN_NOTICE MODULE_NAME ": all devices in use\n");
-		return -ENODEV;
-	}
-
-	/* create a new cm4000_cs device */
-	dev = kzalloc(sizeof(struct cm4000_dev), GFP_KERNEL);
-	if (dev == NULL)
-		return -ENOMEM;
-
-	dev->p_dev = link;
-	link->priv = dev;
-	dev_table[i] = link;
-
-	init_waitqueue_head(&dev->devq);
-	init_waitqueue_head(&dev->ioq);
-	init_waitqueue_head(&dev->atrq);
-	init_waitqueue_head(&dev->readq);
-
-	ret = cm4000_config(link, i);
-	if (ret) {
-		dev_table[i] = NULL;
-		kfree(dev);
-		return ret;
-	}
-
-	device_create(cmm_class, NULL, MKDEV(major, i), NULL, "cmm%d", i);
-
-	return 0;
-}
-
-static void cm4000_detach(struct pcmcia_device *link)
-{
-	struct cm4000_dev *dev = link->priv;
-	int devno;
-
-	/* find device */
-	for (devno = 0; devno < CM4000_MAX_DEV; devno++)
-		if (dev_table[devno] == link)
-			break;
-	if (devno == CM4000_MAX_DEV)
-		return;
-
-	stop_monitor(dev);
-
-	cm4000_release(link);
-
-	dev_table[devno] = NULL;
-	kfree(dev);
-
-	device_destroy(cmm_class, MKDEV(major, devno));
-
-	return;
-}
-
-static const struct file_operations cm4000_fops = {
-	.owner	= THIS_MODULE,
-	.read	= cmm_read,
-	.write	= cmm_write,
-	.unlocked_ioctl	= cmm_ioctl,
-	.open	= cmm_open,
-	.release= cmm_close,
-	.llseek = no_llseek,
-};
-
-static const struct pcmcia_device_id cm4000_ids[] = {
-	PCMCIA_DEVICE_MANF_CARD(0x0223, 0x0002),
-	PCMCIA_DEVICE_PROD_ID12("CardMan", "4000", 0x2FB368CA, 0xA2BD8C39),
-	PCMCIA_DEVICE_NULL,
-};
-MODULE_DEVICE_TABLE(pcmcia, cm4000_ids);
-
-static struct pcmcia_driver cm4000_driver = {
-	.owner	  = THIS_MODULE,
-	.name	  = "cm4000_cs",
-	.probe    = cm4000_probe,
-	.remove   = cm4000_detach,
-	.suspend  = cm4000_suspend,
-	.resume   = cm4000_resume,
-	.id_table = cm4000_ids,
-};
-
-static int __init cmm_init(void)
-{
-	int rc;
-
-	cmm_class = class_create(THIS_MODULE, "cardman_4000");
-	if (IS_ERR(cmm_class))
-		return PTR_ERR(cmm_class);
-
-	major = register_chrdev(0, DEVICE_NAME, &cm4000_fops);
-	if (major < 0) {
-		printk(KERN_WARNING MODULE_NAME
-			": could not get major number\n");
-		class_destroy(cmm_class);
-		return major;
-	}
-
-	rc = pcmcia_register_driver(&cm4000_driver);
-	if (rc < 0) {
-		unregister_chrdev(major, DEVICE_NAME);
-		class_destroy(cmm_class);
-		return rc;
-	}
-
-	return 0;
-}
-
-static void __exit cmm_exit(void)
-{
-	pcmcia_unregister_driver(&cm4000_driver);
-	unregister_chrdev(major, DEVICE_NAME);
-	class_destroy(cmm_class);
-};
-
-module_init(cmm_init);
-module_exit(cmm_exit);
-MODULE_LICENSE("Dual BSD/GPL");

drivers/char/pcmcia/cm4040_cs.c

···
-/*
- * A driver for the Omnikey PCMCIA smartcard reader CardMan 4040
- *
- * (c) 2000-2004 Omnikey AG (http://www.omnikey.com/)
- *
- * (C) 2005-2006 Harald Welte <[e-mail]>
- * 	- add support for poll()
- * 	- driver cleanup
- * 	- add waitqueues
- * 	- adhere to linux kernel coding style and policies
- * 	- support 2.6.13 "new style" pcmcia interface
- * 	- add class interface for udev device creation
- *
- * The device basically is a USB CCID compliant device that has been
- * attached to an I/O-Mapped FIFO.
- *
- * All rights reserved, Dual BSD/GPL Licensed.
- */
-
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/slab.h>
-#include <linux/init.h>
-#include <linux/fs.h>
-#include <linux/delay.h>
-#include <linux/poll.h>
-#include <linux/mutex.h>
-#include <linux/wait.h>
-#include <linux/uaccess.h>
-#include <asm/io.h>
-
-#include <pcmcia/cistpl.h>
-#include <pcmcia/cisreg.h>
-#include <pcmcia/ciscode.h>
-#include <pcmcia/ds.h>
-
-#include "cm4040_cs.h"
-
-
-#define reader_to_dev(x)	(&x->p_dev->dev)
-
-/* n (debug level) is ignored */
-/* additional debug output may be enabled by re-compiling with
- * CM4040_DEBUG set */
-/* #define CM4040_DEBUG */
-#define DEBUGP(n, rdr, x, args...) do { 		\
-		dev_dbg(reader_to_dev(rdr), "%s:" x, 	\
-			   __func__ , ## args);		\
-	} while (0)
-
-static DEFINE_MUTEX(cm4040_mutex);
-
-#define	CCID_DRIVER_BULK_DEFAULT_TIMEOUT  	(150*HZ)
-#define	CCID_DRIVER_ASYNC_POWERUP_TIMEOUT 	(35*HZ)
-#define	CCID_DRIVER_MINIMUM_TIMEOUT 		(3*HZ)
-#define READ_WRITE_BUFFER_SIZE 512
-#define POLL_LOOP_COUNT				1000
-
-/* how often to poll for fifo status change */
-#define POLL_PERIOD 				msecs_to_jiffies(10)
-
-static void reader_release(struct pcmcia_device *link);
-
-static int major;
-static struct class *cmx_class;
-
-#define		BS_READABLE	0x01
-#define		BS_WRITABLE	0x02
-
-struct reader_dev {
-	struct pcmcia_device	*p_dev;
-	wait_queue_head_t	devq;
-	wait_queue_head_t	poll_wait;
-	wait_queue_head_t	read_wait;
-	wait_queue_head_t	write_wait;
-	unsigned long 	  	buffer_status;
-	unsigned long     	timeout;
-	unsigned char     	s_buf[READ_WRITE_BUFFER_SIZE];
-	unsigned char     	r_buf[READ_WRITE_BUFFER_SIZE];
-	struct timer_list 	poll_timer;
-};
-
-static struct pcmcia_device *dev_table[CM_MAX_DEV];
-
-#ifndef CM4040_DEBUG
-#define	xoutb	outb
-#define	xinb	inb
-#else
-static inline void xoutb(unsigned char val, unsigned short port)
-{
-	pr_debug("outb(val=%.2x,port=%.4x)\n", val, port);
-	outb(val, port);
-}
-
-static inline unsigned char xinb(unsigned short port)
-{
-	unsigned char val;
-
-	val = inb(port);
-	pr_debug("%.2x=inb(%.4x)\n", val, port);
-	return val;
-}
-#endif
-
-/* poll the device fifo status register.  not to be confused with
- * the poll syscall. */
-static void cm4040_do_poll(struct timer_list *t)
-{
-	struct reader_dev *dev = from_timer(dev, t, poll_timer);
-	unsigned int obs = xinb(dev->p_dev->resource[0]->start
-				+ REG_OFFSET_BUFFER_STATUS);
-
-	if ((obs & BSR_BULK_IN_FULL)) {
-		set_bit(BS_READABLE, &dev->buffer_status);
-		DEBUGP(4, dev, "waking up read_wait\n");
-		wake_up_interruptible(&dev->read_wait);
-	} else
-		clear_bit(BS_READABLE, &dev->buffer_status);
-
-	if (!(obs & BSR_BULK_OUT_FULL)) {
-		set_bit(BS_WRITABLE, &dev->buffer_status);
-		DEBUGP(4, dev, "waking up write_wait\n");
-		wake_up_interruptible(&dev->write_wait);
-	} else
-		clear_bit(BS_WRITABLE, &dev->buffer_status);
-
-	if (dev->buffer_status)
-		wake_up_interruptible(&dev->poll_wait);
-
-	mod_timer(&dev->poll_timer, jiffies + POLL_PERIOD);
-}
-
-static void cm4040_stop_poll(struct reader_dev *dev)
-{
-	del_timer_sync(&dev->poll_timer);
-}
-
-static int wait_for_bulk_out_ready(struct reader_dev *dev)
-{
-	int i, rc;
-	int iobase = dev->p_dev->resource[0]->start;
-
-	for (i = 0; i < POLL_LOOP_COUNT; i++) {
-		if ((xinb(iobase + REG_OFFSET_BUFFER_STATUS)
-		    & BSR_BULK_OUT_FULL) == 0) {
-			DEBUGP(4, dev, "BulkOut empty (i=%d)\n", i);
-			return 1;
-		}
-	}
-
-	DEBUGP(4, dev, "wait_event_interruptible_timeout(timeout=%ld\n",
-		dev->timeout);
-	rc = wait_event_interruptible_timeout(dev->write_wait,
-					      test_and_clear_bit(BS_WRITABLE,
-						       &dev->buffer_status),
-					      dev->timeout);
-
-	if (rc > 0)
-		DEBUGP(4, dev, "woke up: BulkOut empty\n");
-	else if (rc == 0)
-		DEBUGP(4, dev, "woke up: BulkOut full, returning 0 :(\n");
-	else if (rc < 0)
-		DEBUGP(4, dev, "woke up: signal arrived\n");
-
-	return rc;
-}
-
-/* Write to Sync Control Register */
-static int write_sync_reg(unsigned char val, struct reader_dev *dev)
-{
-	int iobase = dev->p_dev->resource[0]->start;
-	int rc;
-
-	rc = wait_for_bulk_out_ready(dev);
-	if (rc <= 0)
-		return rc;
-
-	xoutb(val, iobase + REG_OFFSET_SYNC_CONTROL);
-	rc = wait_for_bulk_out_ready(dev);
-	if (rc <= 0)
-		return rc;
-
-	return 1;
-}
-
-static int wait_for_bulk_in_ready(struct reader_dev *dev)
-{
-	int i, rc;
-	int iobase = dev->p_dev->resource[0]->start;
-
-	for (i = 0; i < POLL_LOOP_COUNT; i++) {
-		if ((xinb(iobase + REG_OFFSET_BUFFER_STATUS)
-		    & BSR_BULK_IN_FULL) == BSR_BULK_IN_FULL) {
-			DEBUGP(3, dev, "BulkIn full (i=%d)\n", i);
-			return 1;
-		}
-	}
-
-	DEBUGP(4, dev, "wait_event_interruptible_timeout(timeout=%ld\n",
-		dev->timeout);
-	rc = wait_event_interruptible_timeout(dev->read_wait,
-					      test_and_clear_bit(BS_READABLE,
-						 	&dev->buffer_status),
-					      dev->timeout);
-	if (rc > 0)
-		DEBUGP(4, dev, "woke up: BulkIn full\n");
-	else if (rc == 0)
-		DEBUGP(4, dev, "woke up: BulkIn not full, returning 0 :(\n");
-	else if (rc < 0)
-		DEBUGP(4, dev, "woke up: signal arrived\n");
-
-	return rc;
-}
-
-static ssize_t cm4040_read(struct file *filp, char __user *buf,
-			size_t count, loff_t *ppos)
-{
-	struct reader_dev *dev = filp->private_data;
-	int iobase = dev->p_dev->resource[0]->start;
-	size_t bytes_to_read;
-	unsigned long i;
-	size_t min_bytes_to_read;
-	int rc;
-
-	DEBUGP(2, dev, "-> cm4040_read(%s,%d)\n", current->comm, current->pid);
-
-	if (count == 0)
-		return 0;
-
-	if (count < 10)
-		return -EFAULT;
-
-	if (filp->f_flags & O_NONBLOCK) {
-		DEBUGP(4, dev, "filep->f_flags O_NONBLOCK set\n");
-		DEBUGP(2, dev, "<- cm4040_read (failure)\n");
-		return -EAGAIN;
-	}
-
-	if (!pcmcia_dev_present(dev->p_dev))
-		return -ENODEV;
-
-	for (i = 0; i < 5; i++) {
-		rc = wait_for_bulk_in_ready(dev);
-		if (rc <= 0) {
-			DEBUGP(5, dev, "wait_for_bulk_in_ready rc=%.2x\n", rc);
-			DEBUGP(2, dev, "<- cm4040_read (failed)\n");
-			if (rc == -ERESTARTSYS)
-				return rc;
-			return -EIO;
-		}
-	  	dev->r_buf[i] = xinb(iobase + REG_OFFSET_BULK_IN);
-#ifdef CM4040_DEBUG
-		pr_debug("%lu:%2x ", i, dev->r_buf[i]);
-	}
-	pr_debug("\n");
-#else
-	}
-#endif
-
-	bytes_to_read = 5 + le32_to_cpu(*(__le32 *)&dev->r_buf[1]);
-
-	DEBUGP(6, dev, "BytesToRead=%zu\n", bytes_to_read);
-
-	min_bytes_to_read = min(count, bytes_to_read + 5);
-	min_bytes_to_read = min_t(size_t, min_bytes_to_read, READ_WRITE_BUFFER_SIZE);
-
-	DEBUGP(6, dev, "Min=%zu\n", min_bytes_to_read);
-
-	for (i = 0; i < (min_bytes_to_read-5); i++) {
-		rc = wait_for_bulk_in_ready(dev);
-		if (rc <= 0) {
-			DEBUGP(5, dev, "wait_for_bulk_in_ready rc=%.2x\n", rc);
-			DEBUGP(2, dev, "<- cm4040_read (failed)\n");
-			if (rc == -ERESTARTSYS)
-				return rc;
-			return -EIO;
-		}
-		dev->r_buf[i+5] = xinb(iobase + REG_OFFSET_BULK_IN);
-#ifdef CM4040_DEBUG
-		pr_debug("%lu:%2x ", i, dev->r_buf[i]);
-	}
-	pr_debug("\n");
-#else
-	}
-#endif
-
-	*ppos = min_bytes_to_read;
-	if (copy_to_user(buf, dev->r_buf, min_bytes_to_read))
-		return -EFAULT;
-
-	rc = wait_for_bulk_in_ready(dev);
-	if (rc <= 0) {
-		DEBUGP(5, dev, "wait_for_bulk_in_ready rc=%.2x\n", rc);
-		DEBUGP(2, dev, "<- cm4040_read (failed)\n");
-		if (rc == -ERESTARTSYS)
-			return rc;
-		return -EIO;
-	}
-
-	rc = write_sync_reg(SCR_READER_TO_HOST_DONE, dev);
-	if (rc <= 0) {
-		DEBUGP(5, dev, "write_sync_reg c=%.2x\n", rc);
-		DEBUGP(2, dev, "<- cm4040_read (failed)\n");
-		if (rc == -ERESTARTSYS)
-			return rc;
-		else
-			return -EIO;
-	}
-
-	xinb(iobase + REG_OFFSET_BULK_IN);
-
-	DEBUGP(2, dev, "<- cm4040_read (successfully)\n");
-	return min_bytes_to_read;
-}
-
-static ssize_t cm4040_write(struct file *filp, const char __user *buf,
-			 size_t count, loff_t *ppos)
-{
-	struct reader_dev *dev = filp->private_data;
-	int iobase = dev->p_dev->resource[0]->start;
-	ssize_t rc;
-	int i;
-	unsigned int bytes_to_write;
-
-	DEBUGP(2, dev, "-> cm4040_write(%s,%d)\n", current->comm, current->pid);
-
-	if (count == 0) {
-		DEBUGP(2, dev, "<- cm4040_write empty read (successfully)\n");
-		return 0;
-	}
-
-	if ((count < 5) || (count > READ_WRITE_BUFFER_SIZE)) {
-		DEBUGP(2, dev, "<- cm4040_write buffersize=%zd < 5\n", count);
-		return -EIO;
-	}
-
-	if (filp->f_flags & O_NONBLOCK) {
-		DEBUGP(4, dev, "filep->f_flags O_NONBLOCK set\n");
-		DEBUGP(4, dev, "<- cm4040_write (failure)\n");
-		return -EAGAIN;
-	}
-
-	if (!pcmcia_dev_present(dev->p_dev))
-		return -ENODEV;
-
-	bytes_to_write = count;
-	if (copy_from_user(dev->s_buf, buf, bytes_to_write))
-		return -EFAULT;
-
-	switch (dev->s_buf[0]) {
-		case CMD_PC_TO_RDR_XFRBLOCK:
-		case CMD_PC_TO_RDR_SECURE:
-		case CMD_PC_TO_RDR_TEST_SECURE:
-		case CMD_PC_TO_RDR_OK_SECURE:
-			dev->timeout = CCID_DRIVER_BULK_DEFAULT_TIMEOUT;
-			break;
-
-		case CMD_PC_TO_RDR_ICCPOWERON:
-			dev->timeout = CCID_DRIVER_ASYNC_POWERUP_TIMEOUT;
-			break;
-
-		case CMD_PC_TO_RDR_GETSLOTSTATUS:
-		case CMD_PC_TO_RDR_ICCPOWEROFF:
-		case CMD_PC_TO_RDR_GETPARAMETERS:
-		case CMD_PC_TO_RDR_RESETPARAMETERS:
-		case CMD_PC_TO_RDR_SETPARAMETERS:
-		case CMD_PC_TO_RDR_ESCAPE:
-		case CMD_PC_TO_RDR_ICCCLOCK:
-		default:
-			dev->timeout = CCID_DRIVER_MINIMUM_TIMEOUT;
-			break;
-	}
-
-	rc = write_sync_reg(SCR_HOST_TO_READER_START, dev);
-	if (rc <= 0) {
-		DEBUGP(5, dev, "write_sync_reg c=%.2zx\n", rc);
-		DEBUGP(2, dev, "<- cm4040_write (failed)\n");
-		if (rc == -ERESTARTSYS)
-			return rc;
-		else
-			return -EIO;
-	}
-
-	DEBUGP(4, dev, "start \n");
-
-	for (i = 0; i < bytes_to_write; i++) {
-		rc = wait_for_bulk_out_ready(dev);
-		if (rc <= 0) {
-			DEBUGP(5, dev, "wait_for_bulk_out_ready rc=%.2zx\n",
-			       rc);
-			DEBUGP(2, dev, "<- cm4040_write (failed)\n");
-			if (rc == -ERESTARTSYS)
-				return rc;
-			else
-				return -EIO;
-		}
-
-		xoutb(dev->s_buf[i],iobase + REG_OFFSET_BULK_OUT);
-	}
-	DEBUGP(4, dev, "end\n");
-
-	rc = write_sync_reg(SCR_HOST_TO_READER_DONE, dev);
-
-	if (rc <= 0) {
-		DEBUGP(5, dev, "write_sync_reg c=%.2zx\n", rc);
-		DEBUGP(2, dev, "<- cm4040_write (failed)\n");
-		if (rc == -ERESTARTSYS)
-			return rc;
-		else
-			return -EIO;
-	}
-
-	DEBUGP(2, dev, "<- cm4040_write (successfully)\n");
-	return count;
-}
-
-static __poll_t cm4040_poll(struct file *filp, poll_table *wait)
-{
-	struct reader_dev *dev = filp->private_data;
-	__poll_t mask = 0;
-
-	poll_wait(filp, &dev->poll_wait, wait);
-
-	if (test_and_clear_bit(BS_READABLE, &dev->buffer_status))
-		mask |= EPOLLIN | EPOLLRDNORM;
-	if (test_and_clear_bit(BS_WRITABLE, &dev->buffer_status))
-		mask |= EPOLLOUT | EPOLLWRNORM;
-
-	DEBUGP(2, dev, "<- cm4040_poll(%u)\n", mask);
-
-	return mask;
-}
-
-static int cm4040_open(struct inode *inode, struct file *filp)
-{
-	struct reader_dev *dev;
-	struct pcmcia_device *link;
-	int minor = iminor(inode);
-	int ret;
-
-	if (minor >= CM_MAX_DEV)
-		return -ENODEV;
-
-	mutex_lock(&cm4040_mutex);
-	link = dev_table[minor];
-	if (link == NULL || !pcmcia_dev_present(link)) {
-		ret = -ENODEV;
-		goto out;
-	}
-
-	if (link->open) {
-		ret = -EBUSY;
-		goto out;
-	}
-
-	dev = link->priv;
-	filp->private_data = dev;
-
-	if (filp->f_flags & O_NONBLOCK) {
-		DEBUGP(4, dev, "filep->f_flags O_NONBLOCK set\n");
-		ret = -EAGAIN;
-		goto out;
-	}
-
-	link->open = 1;
-
-	mod_timer(&dev->poll_timer, jiffies + POLL_PERIOD);
-
-	DEBUGP(2, dev, "<- cm4040_open (successfully)\n");
-	ret = nonseekable_open(inode, filp);
-out:
-	mutex_unlock(&cm4040_mutex);
-	return ret;
-}
-
-static int cm4040_close(struct inode *inode, struct file *filp)
-{
-	struct reader_dev *dev = filp->private_data;
-	struct pcmcia_device *link;
-	int minor = iminor(inode);
-
-	DEBUGP(2, dev, "-> cm4040_close(maj/min=%d.%d)\n", imajor(inode),
-	      iminor(inode));
-
-	if (minor >= CM_MAX_DEV)
-		return -ENODEV;
-
-	link = dev_table[minor];
-	if (link == NULL)
-		return -ENODEV;
-
-	cm4040_stop_poll(dev);
-
-	link->open = 0;
-	wake_up(&dev->devq);
-
-	DEBUGP(2, dev, "<- cm4040_close\n");
-	return 0;
-}
-
-static void cm4040_reader_release(struct pcmcia_device *link)
-{
-	struct reader_dev *dev = link->priv;
-
-	DEBUGP(3, dev, "-> cm4040_reader_release\n");
-	while (link->open) {
-		DEBUGP(3, dev, MODULE_NAME ": delaying release "
-		       "until process has terminated\n");
- 		wait_event(dev->devq, (link->open == 0));
-	}
-	DEBUGP(3, dev, "<- cm4040_reader_release\n");
-	return;
-}
-
-static int cm4040_config_check(struct pcmcia_device *p_dev, void *priv_data)
-{
-	return pcmcia_request_io(p_dev);
-}
-
-
-static int reader_config(struct pcmcia_device *link, int devno)
-{
-	struct reader_dev *dev;
-	int fail_rc;
-
-	link->config_flags |= CONF_AUTO_SET_IO;
-
-	if (pcmcia_loop_config(link, cm4040_config_check, NULL))
-		goto cs_release;
-
-	fail_rc = pcmcia_enable_device(link);
-	if (fail_rc != 0) {
-		dev_info(&link->dev, "pcmcia_enable_device failed 0x%x\n",
-			 fail_rc);
-		goto cs_release;
-	}
-
-	dev = link->priv;
-
-	DEBUGP(2, dev, "device " DEVICE_NAME "%d at %pR\n", devno,
-	      link->resource[0]);
-	DEBUGP(2, dev, "<- reader_config (succ)\n");
-
-	return 0;
-
-cs_release:
-	reader_release(link);
-	return -ENODEV;
-}
-
-static void reader_release(struct pcmcia_device *link)
-{
-	cm4040_reader_release(link);
-	pcmcia_disable_device(link);
-}
-
-static int reader_probe(struct pcmcia_device *link)
-{
-	struct reader_dev *dev;
-	int i, ret;
-
-	for (i = 0; i < CM_MAX_DEV; i++) {
-		if (dev_table[i] == NULL)
-			break;
-	}
-
-	if (i == CM_MAX_DEV)
-		return -ENODEV;
-
-	dev = kzalloc(sizeof(struct reader_dev), GFP_KERNEL);
-	if (dev == NULL)
-		return -ENOMEM;
-
-	dev->timeout = CCID_DRIVER_MINIMUM_TIMEOUT;
-	dev->buffer_status = 0;
-
-	link->priv = dev;
-	dev->p_dev = link;
-
-	dev_table[i] = link;
-
-	init_waitqueue_head(&dev->devq);
-	init_waitqueue_head(&dev->poll_wait);
-	init_waitqueue_head(&dev->read_wait);
-	init_waitqueue_head(&dev->write_wait);
-	timer_setup(&dev->poll_timer, cm4040_do_poll, 0);
-
-	ret = reader_config(link, i);
-	if (ret) {
-		dev_table[i] = NULL;
-		kfree(dev);
-		return ret;
-	}
-
-	device_create(cmx_class, NULL, MKDEV(major, i), NULL, "cmx%d", i);
-
-	return 0;
-}
-
-static void reader_detach(struct pcmcia_device *link)
-{
-	struct reader_dev *dev = link->priv;
-	int devno;
-
-	/* find device */
-	for (devno = 0; devno < CM_MAX_DEV; devno++) {
-		if (dev_table[devno] == link)
-			break;
-	}
-	if (devno == CM_MAX_DEV)
-		return;
-
-	reader_release(link);
-
-	dev_table[devno] = NULL;
-	kfree(dev);
-
-	device_destroy(cmx_class, MKDEV(major, devno));
-
-	return;
-}
-
-static const struct file_operations reader_fops = {
-	.owner		= THIS_MODULE,
-	.read		= cm4040_read,
-	.write		= cm4040_write,
-	.open		= cm4040_open,
-	.release	= cm4040_close,
-	.poll		= cm4040_poll,
-	.llseek		= no_llseek,
-};
-
-static const struct pcmcia_device_id cm4040_ids[] = {
-	PCMCIA_DEVICE_MANF_CARD(0x0223, 0x0200),
-	PCMCIA_DEVICE_PROD_ID12("OMNIKEY", "CardMan 4040",
-				0xE32CDD8C, 0x8F23318B),
-	PCMCIA_DEVICE_NULL,
-};
-MODULE_DEVICE_TABLE(pcmcia, cm4040_ids);
-
-static struct pcmcia_driver reader_driver = {
-  	.owner		= THIS_MODULE,
-	.name		= "cm4040_cs",
-	.probe		= reader_probe,
-	.remove		= reader_detach,
-	.id_table	= cm4040_ids,
-};
-
-static int __init cm4040_init(void)
-{
-	int rc;
-
-	cmx_class = class_create(THIS_MODULE, "cardman_4040");
-	if (IS_ERR(cmx_class))
-		return PTR_ERR(cmx_class);
-
-	major = register_chrdev(0, DEVICE_NAME, &reader_fops);
-	if (major < 0) {
-		printk(KERN_WARNING MODULE_NAME
-			": could not get major number\n");
-		class_destroy(cmx_class);
-		return major;
-	}
-
-	rc = pcmcia_register_driver(&reader_driver);
-	if (rc < 0) {
-		unregister_chrdev(major, DEVICE_NAME);
-		class_destroy(cmx_class);
-		return rc;
-	}
-
-	return 0;
-}
-
-static void __exit cm4040_exit(void)
-{
-	pcmcia_unregister_driver(&reader_driver);
-	unregister_chrdev(major, DEVICE_NAME);
-	class_destroy(cmx_class);
-}
-
-module_init(cm4040_init);
-module_exit(cm4040_exit);
-MODULE_LICENSE("Dual BSD/GPL");

drivers/char/pcmcia/cm4040_cs.h

···
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef	_CM4040_H_
-#define	_CM4040_H_
-
-#define	CM_MAX_DEV		4
-
-#define	DEVICE_NAME		"cmx"
-#define	MODULE_NAME		"cm4040_cs"
-
-#define REG_OFFSET_BULK_OUT      0
-#define REG_OFFSET_BULK_IN       0
-#define REG_OFFSET_BUFFER_STATUS 1
-#define REG_OFFSET_SYNC_CONTROL  2
-
-#define BSR_BULK_IN_FULL  0x02
-#define BSR_BULK_OUT_FULL 0x01
-
-#define SCR_HOST_TO_READER_START 0x80
-#define SCR_ABORT                0x40
-#define SCR_EN_NOTIFY            0x20
-#define SCR_ACK_NOTIFY           0x10
-#define SCR_READER_TO_HOST_DONE  0x08
-#define SCR_HOST_TO_READER_DONE  0x04
-#define SCR_PULSE_INTERRUPT      0x02
-#define SCR_POWER_DOWN           0x01
-
-
-#define  CMD_PC_TO_RDR_ICCPOWERON       0x62
-#define  CMD_PC_TO_RDR_GETSLOTSTATUS    0x65
-#define  CMD_PC_TO_RDR_ICCPOWEROFF      0x63
-#define  CMD_PC_TO_RDR_SECURE           0x69
-#define  CMD_PC_TO_RDR_GETPARAMETERS    0x6C
-#define  CMD_PC_TO_RDR_RESETPARAMETERS  0x6D
-#define  CMD_PC_TO_RDR_SETPARAMETERS    0x61
-#define  CMD_PC_TO_RDR_XFRBLOCK         0x6F
-#define  CMD_PC_TO_RDR_ESCAPE           0x6B
-#define  CMD_PC_TO_RDR_ICCCLOCK         0x6E
-#define  CMD_PC_TO_RDR_TEST_SECURE      0x74
-#define  CMD_PC_TO_RDR_OK_SECURE        0x89
-
-
-#define  CMD_RDR_TO_PC_SLOTSTATUS         0x81
-#define  CMD_RDR_TO_PC_DATABLOCK          0x80
-#define  CMD_RDR_TO_PC_PARAMETERS         0x82
-#define  CMD_RDR_TO_PC_ESCAPE             0x83
-#define  CMD_RDR_TO_PC_OK_SECURE          0x89
-
-#endif	/* _CM4040_H_ */

drivers/char/pcmcia/scr24x_cs.c

···
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * SCR24x PCMCIA Smart Card Reader Driver
- *
- * Copyright (C) 2005-2006 TL Sudheendran
- * Copyright (C) 2016 Lubomir Rintel
- *
- * Derived from "scr24x_v4.2.6_Release.tar.gz" driver by TL Sudheendran.
- */
-
-#include <linux/device.h>
-#include <linux/module.h>
-#include <linux/delay.h>
-#include <linux/cdev.h>
-#include <linux/slab.h>
-#include <linux/fs.h>
-#include <linux/io.h>
-#include <linux/uaccess.h>
-
-#include <pcmcia/cistpl.h>
-#include <pcmcia/ds.h>
-
-#define CCID_HEADER_SIZE	10
-#define CCID_LENGTH_OFFSET	1
-#define CCID_MAX_LEN		271
-
-#define SCR24X_DATA(n)		(1 + n)
-#define SCR24X_CMD_STATUS	7
-#define CMD_START		0x40
-#define CMD_WRITE_BYTE		0x41
-#define CMD_READ_BYTE		0x42
-#define STATUS_BUSY		0x80
-
-struct scr24x_dev {
-	struct device *dev;
-	struct cdev c_dev;
-	unsigned char buf[CCID_MAX_LEN];
-	int devno;
-	struct mutex lock;
-	struct kref refcnt;
-	u8 __iomem *regs;
-};
-
-#define SCR24X_DEVS 8
-static DECLARE_BITMAP(scr24x_minors, SCR24X_DEVS);
-
-static struct class *scr24x_class;
-static dev_t scr24x_devt;
-
-static void scr24x_delete(struct kref *kref)
-{
-	struct scr24x_dev *dev = container_of(kref, struct scr24x_dev,
-								refcnt);
-
-	kfree(dev);
-}
-
-static int scr24x_wait_ready(struct scr24x_dev *dev)
-{
-	u_char status;
-	int timeout = 100;
-
-	do {
-		status = ioread8(dev->regs + SCR24X_CMD_STATUS);
-		if (!(status & STATUS_BUSY))
-			return 0;
-
-		msleep(20);
-	} while (--timeout);
-
-	return -EIO;
-}
-
-static int scr24x_open(struct inode *inode, struct file *filp)
-{
-	struct scr24x_dev *dev = container_of(inode->i_cdev,
-				struct scr24x_dev, c_dev);
-
-	kref_get(&dev->refcnt);
-	filp->private_data = dev;
-
-	return stream_open(inode, filp);
-}
-
-static int scr24x_release(struct inode *inode, struct file *filp)
-{
-	struct scr24x_dev *dev = filp->private_data;
-
-	/* We must not take the dev->lock here as scr24x_delete()
-	 * might be called to remove the dev structure altogether.
-	 * We don't need the lock anyway, since after the reference
-	 * acquired in probe() is released in remove() the chrdev
-	 * is already unregistered and noone can possibly acquire
-	 * a reference via open() anymore. */
-	kref_put(&dev->refcnt, scr24x_delete);
-	return 0;
-}
-
-static int read_chunk(struct scr24x_dev *dev, size_t offset, size_t limit)
-{
-	size_t i, y;
-	int ret;
-
-	for (i = offset; i < limit; i += 5) {
-		iowrite8(CMD_READ_BYTE, dev->regs + SCR24X_CMD_STATUS);
-		ret = scr24x_wait_ready(dev);
-		if (ret < 0)
-			return ret;
-
-		for (y = 0; y < 5 && i + y < limit; y++)
-			dev->buf[i + y] = ioread8(dev->regs + SCR24X_DATA(y));
-	}
-
-	return 0;
-}
-
-static ssize_t scr24x_read(struct file *filp, char __user *buf, size_t count,
-								loff_t *ppos)
-{
-	struct scr24x_dev *dev = filp->private_data;
-	int ret;
-	int len;
-
-	if (count < CCID_HEADER_SIZE)
-		return -EINVAL;
-
-	if (mutex_lock_interruptible(&dev->lock))
-		return -ERESTARTSYS;
-
-	if (!dev->dev) {
-		ret = -ENODEV;
-		goto out;
-	}
-
-	ret = scr24x_wait_ready(dev);
-	if (ret < 0)
-		goto out;
-	len = CCID_HEADER_SIZE;
-	ret = read_chunk(dev, 0, len);
-	if (ret < 0)
-		goto out;
-
-	len += le32_to_cpu(*(__le32 *)(&dev->buf[CCID_LENGTH_OFFSET]));
-	if (len > sizeof(dev->buf)) {
-		ret = -EIO;
-		goto out;
-	}
-	ret = read_chunk(dev, CCID_HEADER_SIZE, len);
-	if (ret < 0)
-		goto out;
-
-	if (len < count)
-		count = len;
-
-	if (copy_to_user(buf, dev->buf, count)) {
-		ret = -EFAULT;
-		goto out;
-	}
-
-	ret = count;
-out:
-	mutex_unlock(&dev->lock);
-	return ret;
-}
-
-static ssize_t scr24x_write(struct file *filp, const char __user *buf,
-					size_t count, loff_t *ppos)
-{
-	struct scr24x_dev *dev = filp->private_data;
-	size_t i, y;
-	int ret;
-
-	if (mutex_lock_interruptible(&dev->lock))
-		return -ERESTARTSYS;
-
-	if (!dev->dev) {
-		ret = -ENODEV;
-		goto out;
-	}
-
-	if (count > sizeof(dev->buf)) {
-		ret = -EINVAL;
-		goto out;
-	}
-
-	if (copy_from_user(dev->buf, buf, count)) {
-		ret = -EFAULT;
-		goto out;
-	}
-
-	ret = scr24x_wait_ready(dev);
-	if (ret < 0)
-		goto out;
-
-	iowrite8(CMD_START, dev->regs + SCR24X_CMD_STATUS);
-	ret = scr24x_wait_ready(dev);
-	if (ret < 0)
-		goto out;
-
-	for (i = 0; i < count; i += 5) {
-		for (y = 0; y < 5 && i + y < count; y++)
-			iowrite8(dev->buf[i + y], dev->regs + SCR24X_DATA(y));
-
-		iowrite8(CMD_WRITE_BYTE, dev->regs + SCR24X_CMD_STATUS);
-		ret = scr24x_wait_ready(dev);
-		if (ret < 0)
-			goto out;
-	}
-
-	ret = count;
-out:
-	mutex_unlock(&dev->lock);
-	return ret;
-}
-
-static const struct file_operations scr24x_fops = {
-	.owner		= THIS_MODULE,
-	.read		= scr24x_read,
-	.write		= scr24x_write,
-	.open		= scr24x_open,
-	.release	= scr24x_release,
-	.llseek		= no_llseek,
-};
-
-static int scr24x_config_check(struct pcmcia_device *link, void *priv_data)
-{
-	if (resource_size(link->resource[PCMCIA_IOPORT_0]) != 0x11)
-		return -ENODEV;
-	return pcmcia_request_io(link);
-}
-
-static int scr24x_probe(struct pcmcia_device *link)
-{
-	struct scr24x_dev *dev;
-	int ret;
-
-	dev = kzalloc(sizeof(*dev), GFP_KERNEL);
-	if (!dev)
-		return -ENOMEM;
-
-	dev->devno = find_first_zero_bit(scr24x_minors, SCR24X_DEVS);
-	if (dev->devno >= SCR24X_DEVS) {
-		ret = -EBUSY;
-		goto err;
-	}
-
-	mutex_init(&dev->lock);
-	kref_init(&dev->refcnt);
-
-	link->priv = dev;
-	link->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_SET_IO;
-
-	ret = pcmcia_loop_config(link, scr24x_config_check, NULL);
-	if (ret < 0)
-		goto err;
-
-	dev->dev = &link->dev;
-	dev->regs = devm_ioport_map(&link->dev,
-				link->resource[PCMCIA_IOPORT_0]->start,
-				resource_size(link->resource[PCMCIA_IOPORT_0]));
-	if (!dev->regs) {
-		ret = -EIO;
-		goto err;
-	}
-
-	cdev_init(&dev->c_dev, &scr24x_fops);
-	dev->c_dev.owner = THIS_MODULE;
-	ret = cdev_add(&dev->c_dev, MKDEV(MAJOR(scr24x_devt), dev->devno), 1);
-	if (ret < 0)
-		goto err;
-
-	ret = pcmcia_enable_device(link);
-	if (ret < 0) {
-		pcmcia_disable_device(link);
-		goto err;
-	}
-
-	device_create(scr24x_class, NULL, MKDEV(MAJOR(scr24x_devt), dev->devno),
-		      NULL, "scr24x%d", dev->devno);
-
-	dev_info(&link->dev, "SCR24x Chip Card Interface\n");
-	return 0;
-
-err:
-	if (dev->devno < SCR24X_DEVS)
-		clear_bit(dev->devno, scr24x_minors);
-	kfree (dev);
-	return ret;
-}
-
-static void scr24x_remove(struct pcmcia_device *link)
-{
-	struct scr24x_dev *dev = (struct scr24x_dev *)link->priv;
-
-	device_destroy(scr24x_class, MKDEV(MAJOR(scr24x_devt), dev->devno));
-	mutex_lock(&dev->lock);
-	pcmcia_disable_device(link);
-	cdev_del(&dev->c_dev);
-	clear_bit(dev->devno, scr24x_minors);
-	dev->dev = NULL;
-	mutex_unlock(&dev->lock);
-
-	kref_put(&dev->refcnt, scr24x_delete);
-}
-
-static const struct pcmcia_device_id scr24x_ids[] = {
-	PCMCIA_DEVICE_PROD_ID12("HP", "PC Card Smart Card Reader",
-					0x53cb94f9, 0xbfdf89a5),
-	PCMCIA_DEVICE_PROD_ID1("SCR241 PCMCIA", 0x6271efa3),
-	PCMCIA_DEVICE_PROD_ID1("SCR243 PCMCIA", 0x2054e8de),
-	PCMCIA_DEVICE_PROD_ID1("SCR24x PCMCIA", 0x54a33665),
-	PCMCIA_DEVICE_NULL
-};
-MODULE_DEVICE_TABLE(pcmcia, scr24x_ids);
-
-static struct pcmcia_driver scr24x_driver = {
-	.owner		= THIS_MODULE,
-	.name		= "scr24x_cs",
-	.probe		= scr24x_probe,
-	.remove		= scr24x_remove,
-	.id_table	= scr24x_ids,
-};
-
-static int __init scr24x_init(void)
-{
-	int ret;
-
-	scr24x_class = class_create(THIS_MODULE, "scr24x");
-	if (IS_ERR(scr24x_class))
-		return PTR_ERR(scr24x_class);
-
-	ret = alloc_chrdev_region(&scr24x_devt, 0, SCR24X_DEVS, "scr24x");
-	if (ret < 0)  {
-		class_destroy(scr24x_class);
-		return ret;
-	}
-
-	ret = pcmcia_register_driver(&scr24x_driver);
-	if (ret < 0) {
-		unregister_chrdev_region(scr24x_devt, SCR24X_DEVS);
-		class_destroy(scr24x_class);
-	}
-
-	return ret;
-}
-
-static void __exit scr24x_exit(void)
-{
-	pcmcia_unregister_driver(&scr24x_driver);
-	unregister_chrdev_region(scr24x_devt, SCR24X_DEVS);
-	class_destroy(scr24x_class);
-}
-
-module_init(scr24x_init);
-module_exit(scr24x_exit);
-
-MODULE_AUTHOR("Lubomir Rintel");
-MODULE_DESCRIPTION("SCR24x PCMCIA Smart Card Reader Driver");
-MODULE_LICENSE("GPL");

drivers/char/pcmcia/synclink_cs.c

···
-/*
- * linux/drivers/char/pcmcia/synclink_cs.c
- *
- * $Id: synclink_cs.c,v 4.34 2005/09/08 13:20:54 paulkf Exp $
- *
- * Device driver for Microgate SyncLink PC Card
- * multiprotocol serial adapter.
- *
- * written by Paul Fulghum for Microgate Corporation
- * [e-mail]
- *
- * Microgate and SyncLink are trademarks of Microgate Corporation
- *
- * This code is released under the GNU General Public License (GPL)
- *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
- * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
- * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
- * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
- * OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#define VERSION(ver,rel,seq) (((ver)<<16) | ((rel)<<8) | (seq))
-#if defined(__i386__)
-#  define BREAKPOINT() asm("   int $3");
-#else
-#  define BREAKPOINT() { }
-#endif
-
-#define MAX_DEVICE_COUNT 4
-
-#include <linux/module.h>
-#include <linux/errno.h>
-#include <linux/signal.h>
-#include <linux/sched.h>
-#include <linux/timer.h>
-#include <linux/time.h>
-#include <linux/interrupt.h>
-#include <linux/tty.h>
-#include <linux/tty_flip.h>
-#include <linux/serial.h>
-#include <linux/major.h>
-#include <linux/string.h>
-#include <linux/fcntl.h>
-#include <linux/ptrace.h>
-#include <linux/ioport.h>
-#include <linux/mm.h>
-#include <linux/seq_file.h>
-#include <linux/slab.h>
-#include <linux/netdevice.h>
-#include <linux/vmalloc.h>
-#include <linux/init.h>
-#include <linux/delay.h>
-#include <linux/ioctl.h>
-#include <linux/synclink.h>
-
-#include <asm/io.h>
-#include <asm/irq.h>
-#include <asm/dma.h>
-#include <linux/bitops.h>
-#include <asm/types.h>
-#include <linux/termios.h>
-#include <linux/workqueue.h>
-#include <linux/hdlc.h>
-
-#include <pcmcia/cistpl.h>
-#include <pcmcia/cisreg.h>
-#include <pcmcia/ds.h>
-
-#if defined(CONFIG_HDLC) || (defined(CONFIG_HDLC_MODULE) && defined(CONFIG_SYNCLINK_CS_MODULE))
-#define SYNCLINK_GENERIC_HDLC 1
-#else
-#define SYNCLINK_GENERIC_HDLC 0
-#endif
-
-#define GET_USER(error,value,addr) error = get_user(value,addr)
-#define COPY_FROM_USER(error,dest,src,size) error = copy_from_user(dest,src,size) ? -EFAULT : 0
-#define PUT_USER(error,value,addr) error = put_user(value,addr)
-#define COPY_TO_USER(error,dest,src,size) error = copy_to_user(dest,src,size) ? -EFAULT : 0
-
-#include <linux/uaccess.h>
-
-static MGSL_PARAMS default_params = {
-	MGSL_MODE_HDLC,			/* unsigned long mode */
-	0,				/* unsigned char loopback; */
-	HDLC_FLAG_UNDERRUN_ABORT15,	/* unsigned short flags; */
-	HDLC_ENCODING_NRZI_SPACE,	/* unsigned char encoding; */
-	0,				/* unsigned long clock_speed; */
-	0xff,				/* unsigned char addr_filter; */
-	HDLC_CRC_16_CCITT,		/* unsigned short crc_type; */
-	HDLC_PREAMBLE_LENGTH_8BITS,	/* unsigned char preamble_length; */
-	HDLC_PREAMBLE_PATTERN_NONE,	/* unsigned char preamble; */
-	9600,				/* unsigned long data_rate; */
-	8,				/* unsigned char data_bits; */
-	1,				/* unsigned char stop_bits; */
-	ASYNC_PARITY_NONE		/* unsigned char parity; */
-};
-
-typedef struct {
-	int count;
-	unsigned char status;
-	char data[1];
-} RXBUF;
-
-/* The queue of BH actions to be performed */
-
-#define BH_RECEIVE  1
-#define BH_TRANSMIT 2
-#define BH_STATUS   4
-
-#define IO_PIN_SHUTDOWN_LIMIT 100
-
-#define RELEVANT_IFLAG(iflag) (iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK))
-
-struct _input_signal_events {
-	int	ri_up;
-	int	ri_down;
-	int	dsr_up;
-	int	dsr_down;
-	int	dcd_up;
-	int	dcd_down;
-	int	cts_up;
-	int	cts_down;
-};
-
-
-/*
- * Device instance data structure
- */
-
-typedef struct _mgslpc_info {
-	struct tty_port		port;
-	void *if_ptr;	/* General purpose pointer (used by SPPP) */
-	int			magic;
-	int			line;
-
-	struct mgsl_icount	icount;
-
-	int			timeout;
-	int			x_char;		/* xon/xoff character */
-	unsigned char		read_status_mask;
-	unsigned char		ignore_status_mask;
-
-	unsigned char *tx_buf;
-	int            tx_put;
-	int            tx_get;
-	int            tx_count;
-
-	/* circular list of fixed length rx buffers */
-
-	unsigned char  *rx_buf;        /* memory allocated for all rx buffers */
-	int            rx_buf_total_size; /* size of memory allocated for rx buffers */
-	int            rx_put;         /* index of next empty rx buffer */
-	int            rx_get;         /* index of next full rx buffer */
-	int            rx_buf_size;    /* size in bytes of single rx buffer */
-	int            rx_buf_count;   /* total number of rx buffers */
-	int            rx_frame_count; /* number of full rx buffers */
-
-	wait_queue_head_t	status_event_wait_q;
-	wait_queue_head_t	event_wait_q;
-	struct timer_list	tx_timer;	/* HDLC transmit timeout timer */
-	struct _mgslpc_info	*next_device;	/* device list link */
-
-	unsigned short imra_value;
-	unsigned short imrb_value;
-	unsigned char  pim_value;
-
-	spinlock_t lock;
-	struct work_struct task;		/* task structure for scheduling bh */
-
-	u32 max_frame_size;
-
-	u32 pending_bh;
-
-	bool bh_running;
-	bool bh_requested;
-
-	int dcd_chkcount; /* check counts to prevent */
-	int cts_chkcount; /* too many IRQs if a signal */
-	int dsr_chkcount; /* is floating */
-	int ri_chkcount;
-
-	bool rx_enabled;
-	bool rx_overflow;
-
-	bool tx_enabled;
-	bool tx_active;
-	bool tx_aborting;
-	u32 idle_mode;
-
-	int if_mode; /* serial interface selection (RS-232, v.35 etc) */
-
-	char device_name[25];		/* device instance name */
-
-	unsigned int io_base;	/* base I/O address of adapter */
-	unsigned int irq_level;
-
-	MGSL_PARAMS params;		/* communications parameters */
-
-	unsigned char serial_signals;	/* current serial signal states */
-
-	bool irq_occurred;		/* for diagnostics use */
-	char testing_irq;
-	unsigned int init_error;	/* startup error (DIAGS)	*/
-
-	char *flag_buf;
-	bool drop_rts_on_tx_done;
-
-	struct	_input_signal_events	input_signal_events;
-
-	/* PCMCIA support */
-	struct pcmcia_device	*p_dev;
-	int		      stop;
-
-	/* SPPP/Cisco HDLC device parts */
-	int netcount;
-	spinlock_t netlock;
-
-#if SYNCLINK_GENERIC_HDLC
-	struct net_device *netdev;
-#endif
-
-} MGSLPC_INFO;
-
-#define MGSLPC_MAGIC 0x5402
-
-/*
- * The size of the serial xmit buffer is 1 page, or 4096 bytes
- */
-#define TXBUFSIZE 4096
-
-
-#define CHA     0x00   /* channel A offset */
-#define CHB     0x40   /* channel B offset */
-
-/*
- *  FIXME: PPC has PVR defined in asm/reg.h.  For now we just undef it.
- */
-#undef PVR
-
-#define RXFIFO  0
-#define TXFIFO  0
-#define STAR    0x20
-#define CMDR    0x20
-#define RSTA    0x21
-#define PRE     0x21
-#define MODE    0x22
-#define TIMR    0x23
-#define XAD1    0x24
-#define XAD2    0x25
-#define RAH1    0x26
-#define RAH2    0x27
-#define DAFO    0x27
-#define RAL1    0x28
-#define RFC     0x28
-#define RHCR    0x29
-#define RAL2    0x29
-#define RBCL    0x2a
-#define XBCL    0x2a
-#define RBCH    0x2b
-#define XBCH    0x2b
-#define CCR0    0x2c
-#define CCR1    0x2d
-#define CCR2    0x2e
-#define CCR3    0x2f
-#define VSTR    0x34
-#define BGR     0x34
-#define RLCR    0x35
-#define AML     0x36
-#define AMH     0x37
-#define GIS     0x38
-#define IVA     0x38
-#define IPC     0x39
-#define ISR     0x3a
-#define IMR     0x3a
-#define PVR     0x3c
-#define PIS     0x3d
-#define PIM     0x3d
-#define PCR     0x3e
-#define CCR4    0x3f
-
-// IMR/ISR
-
-#define IRQ_BREAK_ON    BIT15   // rx break detected
-#define IRQ_DATAOVERRUN BIT14	// receive data overflow
-#define IRQ_ALLSENT     BIT13	// all sent
-#define IRQ_UNDERRUN    BIT12	// transmit data underrun
-#define IRQ_TIMER       BIT11	// timer interrupt
-#define IRQ_CTS         BIT10	// CTS status change
-#define IRQ_TXREPEAT    BIT9	// tx message repeat
-#define IRQ_TXFIFO      BIT8	// transmit pool ready
-#define IRQ_RXEOM       BIT7	// receive message end
-#define IRQ_EXITHUNT    BIT6	// receive frame start
-#define IRQ_RXTIME      BIT6    // rx char timeout
-#define IRQ_DCD         BIT2	// carrier detect status change
-#define IRQ_OVERRUN     BIT1	// receive frame overflow
-#define IRQ_RXFIFO      BIT0	// receive pool full
-
-// STAR
-
-#define XFW   BIT6		// transmit FIFO write enable
-#define CEC   BIT2		// command executing
-#define CTS   BIT1		// CTS state
-
-#define PVR_DTR      BIT0
-#define PVR_DSR      BIT1
-#define PVR_RI       BIT2
-#define PVR_AUTOCTS  BIT3
-#define PVR_RS232    0x20   /* 0010b */
-#define PVR_V35      0xe0   /* 1110b */
-#define PVR_RS422    0x40   /* 0100b */
-
-/* Register access functions */
-
-#define write_reg(info, reg, val) outb((val),(info)->io_base + (reg))
-#define read_reg(info, reg) inb((info)->io_base + (reg))
-
-#define read_reg16(info, reg) inw((info)->io_base + (reg))
-#define write_reg16(info, reg, val) outw((val), (info)->io_base + (reg))
-
-#define set_reg_bits(info, reg, mask) \
-	write_reg(info, (reg), \
-		 (unsigned char) (read_reg(info, (reg)) | (mask)))
-#define clear_reg_bits(info, reg, mask) \
-	write_reg(info, (reg), \
-		 (unsigned char) (read_reg(info, (reg)) & ~(mask)))
-/*
- * interrupt enable/disable routines
- */
-static void irq_disable(MGSLPC_INFO *info, unsigned char channel, unsigned short mask)
-{
-	if (channel == CHA) {
-		info->imra_value |= mask;
-		write_reg16(info, CHA + IMR, info->imra_value);
-	} else {
-		info->imrb_value |= mask;
-		write_reg16(info, CHB + IMR, info->imrb_value);
-	}
-}
-static void irq_enable(MGSLPC_INFO *info, unsigned char channel, unsigned short mask)
-{
-	if (channel == CHA) {
-		info->imra_value &= ~mask;
-		write_reg16(info, CHA + IMR, info->imra_value);
-	} else {
-		info->imrb_value &= ~mask;
-		write_reg16(info, CHB + IMR, info->imrb_value);
-	}
-}
-
-#define port_irq_disable(info, mask) \
-	{ info->pim_value |= (mask); write_reg(info, PIM, info->pim_value); }
-
-#define port_irq_enable(info, mask) \
-	{ info->pim_value &= ~(mask); write_reg(info, PIM, info->pim_value); }
-
-static void rx_start(MGSLPC_INFO *info);
-static void rx_stop(MGSLPC_INFO *info);
-
-static void tx_start(MGSLPC_INFO *info, struct tty_struct *tty);
-static void tx_stop(MGSLPC_INFO *info);
-static void tx_set_idle(MGSLPC_INFO *info);
-
-static void get_signals(MGSLPC_INFO *info);
-static void set_signals(MGSLPC_INFO *info);
-
-static void reset_device(MGSLPC_INFO *info);
-
-static void hdlc_mode(MGSLPC_INFO *info);
-static void async_mode(MGSLPC_INFO *info);
-
-static void tx_timeout(struct timer_list *t);
-
-static bool carrier_raised(struct tty_port *port);
-static void dtr_rts(struct tty_port *port, bool active);
-
-#if SYNCLINK_GENERIC_HDLC
-#define dev_to_port(D) (dev_to_hdlc(D)->priv)
-static void hdlcdev_tx_done(MGSLPC_INFO *info);
-static void hdlcdev_rx(MGSLPC_INFO *info, char *buf, int size);
-static int  hdlcdev_init(MGSLPC_INFO *info);
-static void hdlcdev_exit(MGSLPC_INFO *info);
-#endif
-
-static void trace_block(MGSLPC_INFO *info,const char* data, int count, int xmit);
-
-static bool register_test(MGSLPC_INFO *info);
-static bool irq_test(MGSLPC_INFO *info);
-static int adapter_test(MGSLPC_INFO *info);
-
-static int claim_resources(MGSLPC_INFO *info);
-static void release_resources(MGSLPC_INFO *info);
-static int mgslpc_add_device(MGSLPC_INFO *info);
-static void mgslpc_remove_device(MGSLPC_INFO *info);
-
-static bool rx_get_frame(MGSLPC_INFO *info, struct tty_struct *tty);
-static void rx_reset_buffers(MGSLPC_INFO *info);
-static int  rx_alloc_buffers(MGSLPC_INFO *info);
-static void rx_free_buffers(MGSLPC_INFO *info);
-
-static irqreturn_t mgslpc_isr(int irq, void *dev_id);
-
-/*
- * Bottom half interrupt handlers
- */
-static void bh_handler(struct work_struct *work);
-static void bh_transmit(MGSLPC_INFO *info, struct tty_struct *tty);
-static void bh_status(MGSLPC_INFO *info);
-
-/*
- * ioctl handlers
- */
-static int tiocmget(struct tty_struct *tty);
-static int tiocmset(struct tty_struct *tty,
-					unsigned int set, unsigned int clear);
-static int get_stats(MGSLPC_INFO *info, struct mgsl_icount __user *user_icount);
-static int get_params(MGSLPC_INFO *info, MGSL_PARAMS __user *user_params);
-static int set_params(MGSLPC_INFO *info, MGSL_PARAMS __user *new_params, struct tty_struct *tty);
-static int get_txidle(MGSLPC_INFO *info, int __user *idle_mode);
-static int set_txidle(MGSLPC_INFO *info, int idle_mode);
-static int set_txenable(MGSLPC_INFO *info, int enable, struct tty_struct *tty);
-static int tx_abort(MGSLPC_INFO *info);
-static int set_rxenable(MGSLPC_INFO *info, int enable);
-static int wait_events(MGSLPC_INFO *info, int __user *mask);
-
-static MGSLPC_INFO *mgslpc_device_list = NULL;
-static int mgslpc_device_count = 0;
-
-/*
- * Set this param to non-zero to load eax with the
- * .text section address and breakpoint on module load.
- * This is useful for use with gdb and add-symbol-file command.
- */
-static bool break_on_load;
-
-/*
- * Driver major number, defaults to zero to get auto
- * assigned major number. May be forced as module parameter.
- */
-static int ttymajor=0;
-
-static int debug_level = 0;
-static int maxframe[MAX_DEVICE_COUNT] = {0,};
-
-module_param(break_on_load, bool, 0);
-module_param(ttymajor, int, 0);
-module_param(debug_level, int, 0);
-module_param_array(maxframe, int, NULL, 0);
-
-MODULE_LICENSE("GPL");
-
-static char *driver_name = "SyncLink PC Card driver";
-static char *driver_version = "$Revision: 4.34 $";
-
-static struct tty_driver *serial_driver;
-
-/* number of characters left in xmit buffer before we ask for more */
-#define WAKEUP_CHARS 256
-
-static void mgslpc_change_params(MGSLPC_INFO *info, struct tty_struct *tty);
-static void mgslpc_wait_until_sent(struct tty_struct *tty, int timeout);
-
-/* PCMCIA prototypes */
-
-static int mgslpc_config(struct pcmcia_device *link);
-static void mgslpc_release(u_long arg);
-static void mgslpc_detach(struct pcmcia_device *p_dev);
-
-/*
- * 1st function defined in .text section. Calling this function in
- * init_module() followed by a breakpoint allows a remote debugger
- * (gdb) to get the .text address for the add-symbol-file command.
- * This allows remote debugging of dynamically loadable modules.
- */
-static void* mgslpc_get_text_ptr(void)
-{
-	return mgslpc_get_text_ptr;
-}
-
-/*
- * line discipline callback wrappers
- *
- * The wrappers maintain line discipline references
- * while calling into the line discipline.
- *
- * ldisc_receive_buf  - pass receive data to line discipline
- */
-
-static void ldisc_receive_buf(struct tty_struct *tty,
-			      const __u8 *data, char *flags, int count)
-{
-	struct tty_ldisc *ld;
-	if (!tty)
-		return;
-	ld = tty_ldisc_ref(tty);
-	if (ld) {
-		if (ld->ops->receive_buf)
-			ld->ops->receive_buf(tty, data, flags, count);
-		tty_ldisc_deref(ld);
-	}
-}
-
-static const struct tty_port_operations mgslpc_port_ops = {
-	.carrier_raised = carrier_raised,
-	.dtr_rts = dtr_rts
-};
-
-static int mgslpc_probe(struct pcmcia_device *link)
-{
-	MGSLPC_INFO *info;
-	int ret;
-
-	if (debug_level >= DEBUG_LEVEL_INFO)
-		printk("mgslpc_attach\n");
-
-	info = kzalloc(sizeof(MGSLPC_INFO), GFP_KERNEL);
-	if (!info) {
-		printk("Error can't allocate device instance data\n");
-		return -ENOMEM;
-	}
-
-	info->magic = MGSLPC_MAGIC;
-	tty_port_init(&info->port);
-	info->port.ops = &mgslpc_port_ops;
-	INIT_WORK(&info->task, bh_handler);
-	info->max_frame_size = 4096;
-	init_waitqueue_head(&info->status_event_wait_q);
-	init_waitqueue_head(&info->event_wait_q);
-	spin_lock_init(&info->lock);
-	spin_lock_init(&info->netlock);
-	memcpy(&info->params,&default_params,sizeof(MGSL_PARAMS));
-	info->idle_mode = HDLC_TXIDLE_FLAGS;
-	info->imra_value = 0xffff;
-	info->imrb_value = 0xffff;
-	info->pim_value = 0xff;
-
-	info->p_dev = link;
-	link->priv = info;
-
-	/* Initialize the struct pcmcia_device structure */
-
-	ret = mgslpc_config(link);
-	if (ret != 0)
-		goto failed;
-
-	ret = mgslpc_add_device(info);
-	if (ret != 0)
-		goto failed_release;
-
-	return 0;
-
-failed_release:
-	mgslpc_release((u_long)link);
-failed:
-	tty_port_destroy(&info->port);
-	kfree(info);
-	return ret;
-}
-
-/* Card has been inserted.
- */
-
-static int mgslpc_ioprobe(struct pcmcia_device *p_dev, void *priv_data)
-{
-	return pcmcia_request_io(p_dev);
-}
-
-static int mgslpc_config(struct pcmcia_device *link)
-{
-	MGSLPC_INFO *info = link->priv;
-	int ret;
-
-	if (debug_level >= DEBUG_LEVEL_INFO)
-		printk("mgslpc_config(0x%p)\n", link);
-
-	link->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_SET_IO;
-
-	ret = pcmcia_loop_config(link, mgslpc_ioprobe, NULL);
-	if (ret != 0)
-		goto failed;
-
-	link->config_index = 8;
-	link->config_regs = PRESENT_OPTION;
-
-	ret = pcmcia_request_irq(link, mgslpc_isr);
-	if (ret)
-		goto failed;
-	ret = pcmcia_enable_device(link);
-	if (ret)
-		goto failed;
-
-	info->io_base = link->resource[0]->start;
-	info->irq_level = link->irq;
-	return 0;
-
-failed:
-	mgslpc_release((u_long)link);
-	return -ENODEV;
-}
-
-/* Card has been removed.
- * Unregister device and release PCMCIA configuration.
- * If device is open, postpone until it is closed.
- */
-static void mgslpc_release(u_long arg)
-{
-	struct pcmcia_device *link = (struct pcmcia_device *)arg;
-
-	if (debug_level >= DEBUG_LEVEL_INFO)
-		printk("mgslpc_release(0x%p)\n", link);
-
-	pcmcia_disable_device(link);
-}
-
-static void mgslpc_detach(struct pcmcia_device *link)
-{
-	if (debug_level >= DEBUG_LEVEL_INFO)
-		printk("mgslpc_detach(0x%p)\n", link);
-
-	((MGSLPC_INFO *)link->priv)->stop = 1;
-	mgslpc_release((u_long)link);
-
-	mgslpc_remove_device((MGSLPC_INFO *)link->priv);
-}
-
-static int mgslpc_suspend(struct pcmcia_device *link)
-{
-	MGSLPC_INFO *info = link->priv;
-
-	info->stop = 1;
-
-	return 0;
-}
-
-static int mgslpc_resume(struct pcmcia_device *link)
-{
-	MGSLPC_INFO *info = link->priv;
-
-	info->stop = 0;
-
-	return 0;
-}
-
-
-static inline bool mgslpc_paranoia_check(MGSLPC_INFO *info,
-					char *name, const char *routine)
-{
-#ifdef MGSLPC_PARANOIA_CHECK
-	static const char *badmagic =
-		"Warning: bad magic number for mgsl struct (%s) in %s\n";
-	static const char *badinfo =
-		"Warning: null mgslpc_info for (%s) in %s\n";
-
-	if (!info) {
-		printk(badinfo, name, routine);
-		return true;
-	}
-	if (info->magic != MGSLPC_MAGIC) {
-		printk(badmagic, name, routine);
-		return true;
-	}
-#else
-	if (!info)
-		return true;
-#endif
-	return false;
-}
-
-
-#define CMD_RXFIFO      BIT7	// release current rx FIFO
-#define CMD_RXRESET     BIT6	// receiver reset
-#define CMD_RXFIFO_READ BIT5
-#define CMD_START_TIMER BIT4
-#define CMD_TXFIFO      BIT3	// release current tx FIFO
-#define CMD_TXEOM       BIT1	// transmit end message
-#define CMD_TXRESET     BIT0	// transmit reset
-
-static bool wait_command_complete(MGSLPC_INFO *info, unsigned char channel)
-{
-	int i = 0;
-	/* wait for command completion */
-	while (read_reg(info, (unsigned char)(channel+STAR)) & BIT2) {
-		udelay(1);
-		if (i++ == 1000)
-			return false;
-	}
-	return true;
-}
-
-static void issue_command(MGSLPC_INFO *info, unsigned char channel, unsigned char cmd)
-{
-	wait_command_complete(info, channel);
-	write_reg(info, (unsigned char) (channel + CMDR), cmd);
-}
-
-static void tx_pause(struct tty_struct *tty)
-{
-	MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
-	unsigned long flags;
-
-	if (mgslpc_paranoia_check(info, tty->name, "tx_pause"))
-		return;
-	if (debug_level >= DEBUG_LEVEL_INFO)
-		printk("tx_pause(%s)\n", info->device_name);
-
-	spin_lock_irqsave(&info->lock, flags);
-	if (info->tx_enabled)
-		tx_stop(info);
-	spin_unlock_irqrestore(&info->lock, flags);
-}
-
-static void tx_release(struct tty_struct *tty)
-{
-	MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
-	unsigned long flags;
-
-	if (mgslpc_paranoia_check(info, tty->name, "tx_release"))
-		return;
-	if (debug_level >= DEBUG_LEVEL_INFO)
-		printk("tx_release(%s)\n", info->device_name);
-
-	spin_lock_irqsave(&info->lock, flags);
-	if (!info->tx_enabled)
-		tx_start(info, tty);
-	spin_unlock_irqrestore(&info->lock, flags);
-}
-
-/* Return next bottom half action to perform.
- * or 0 if nothing to do.
- */
-static int bh_action(MGSLPC_INFO *info)
-{
-	unsigned long flags;
-	int rc = 0;
-
-	spin_lock_irqsave(&info->lock, flags);
-
-	if (info->pending_bh & BH_RECEIVE) {
-		info->pending_bh &= ~BH_RECEIVE;
-		rc = BH_RECEIVE;
-	} else if (info->pending_bh & BH_TRANSMIT) {
-		info->pending_bh &= ~BH_TRANSMIT;
-		rc = BH_TRANSMIT;
-	} else if (info->pending_bh & BH_STATUS) {
-		info->pending_bh &= ~BH_STATUS;
-		rc = BH_STATUS;
-	}
-
-	if (!rc) {
-		/* Mark BH routine as complete */
-		info->bh_running = false;
-		info->bh_requested = false;
-	}
-
-	spin_unlock_irqrestore(&info->lock, flags);
-
-	return rc;
-}
-
-static void bh_handler(struct work_struct *work)
-{
-	MGSLPC_INFO *info = container_of(work, MGSLPC_INFO, task);
-	struct tty_struct *tty;
-	int action;
-
-	if (debug_level >= DEBUG_LEVEL_BH)
-		printk("%s(%d):bh_handler(%s) entry\n",
-			__FILE__,__LINE__,info->device_name);
-
-	info->bh_running = true;
-	tty = tty_port_tty_get(&info->port);
-
-	while((action = bh_action(info)) != 0) {
-
-		/* Process work item */
-		if (debug_level >= DEBUG_LEVEL_BH)
-			printk("%s(%d):bh_handler() work item action=%d\n",
-				__FILE__,__LINE__,action);
-
-		switch (action) {
-
-		case BH_RECEIVE:
-			while(rx_get_frame(info, tty));
-			break;
-		case BH_TRANSMIT:
-			bh_transmit(info, tty);
-			break;
-		case BH_STATUS:
-			bh_status(info);
-			break;
-		default:
-			/* unknown work item ID */
-			printk("Unknown work item ID=%08X!\n", action);
-			break;
-		}
-	}
-
-	tty_kref_put(tty);
-	if (debug_level >= DEBUG_LEVEL_BH)
-		printk("%s(%d):bh_handler(%s) exit\n",
-			__FILE__,__LINE__,info->device_name);
-}
-
-static void bh_transmit(MGSLPC_INFO *info, struct tty_struct *tty)
-{
-	if (debug_level >= DEBUG_LEVEL_BH)
-		printk("bh_transmit() entry on %s\n", info->device_name);
-
-	if (tty)
-		tty_wakeup(tty);
-}
-
-static void bh_status(MGSLPC_INFO *info)
-{
-	info->ri_chkcount = 0;
-	info->dsr_chkcount = 0;
-	info->dcd_chkcount = 0;
-	info->cts_chkcount = 0;
-}
-
-/* eom: non-zero = end of frame */
-static void rx_ready_hdlc(MGSLPC_INFO *info, int eom)
-{
-	unsigned char data[2];
-	unsigned char fifo_count, read_count, i;
-	RXBUF *buf = (RXBUF*)(info->rx_buf + (info->rx_put * info->rx_buf_size));
-
-	if (debug_level >= DEBUG_LEVEL_ISR)
-		printk("%s(%d):rx_ready_hdlc(eom=%d)\n", __FILE__, __LINE__, eom);
-
-	if (!info->rx_enabled)
-		return;
-
-	if (info->rx_frame_count >= info->rx_buf_count) {
-		/* no more free buffers */
-		issue_command(info, CHA, CMD_RXRESET);
-		info->pending_bh |= BH_RECEIVE;
-		info->rx_overflow = true;
-		info->icount.buf_overrun++;
-		return;
-	}
-
-	if (eom) {
-		/* end of frame, get FIFO count from RBCL register */
-		fifo_count = (unsigned char)(read_reg(info, CHA+RBCL) & 0x1f);
-		if (fifo_count == 0)
-			fifo_count = 32;
-	} else
-		fifo_count = 32;
-
-	do {
-		if (fifo_count == 1) {
-			read_count = 1;
-			data[0] = read_reg(info, CHA + RXFIFO);
-		} else {
-			read_count = 2;
-			*((unsigned short *) data) = read_reg16(info, CHA + RXFIFO);
-		}
-		fifo_count -= read_count;
-		if (!fifo_count && eom)
-			buf->status = data[--read_count];
-
-		for (i = 0; i < read_count; i++) {
-			if (buf->count >= info->max_frame_size) {
-				/* frame too large, reset receiver and reset current buffer */
-				issue_command(info, CHA, CMD_RXRESET);
-				buf->count = 0;
-				return;
-			}
-			*(buf->data + buf->count) = data[i];
-			buf->count++;
-		}
-	} while (fifo_count);
-
-	if (eom) {
-		info->pending_bh |= BH_RECEIVE;
-		info->rx_frame_count++;
-		info->rx_put++;
-		if (info->rx_put >= info->rx_buf_count)
-			info->rx_put = 0;
-	}
-	issue_command(info, CHA, CMD_RXFIFO);
-}
-
-static void rx_ready_async(MGSLPC_INFO *info, int tcd)
-{
-	struct tty_port *port = &info->port;
-	unsigned char data, status, flag;
-	int fifo_count;
-	int work = 0;
-	struct mgsl_icount *icount = &info->icount;
-
-	if (tcd) {
-		/* early termination, get FIFO count from RBCL register */
-		fifo_count = (unsigned char)(read_reg(info, CHA+RBCL) & 0x1f);
-
-		/* Zero fifo count could mean 0 or 32 bytes available.
-		 * If BIT5 of STAR is set then at least 1 byte is available.
-		 */
-		if (!fifo_count && (read_reg(info,CHA+STAR) & BIT5))
-			fifo_count = 32;
-	} else
-		fifo_count = 32;
-
-	tty_buffer_request_room(port, fifo_count);
-	/* Flush received async data to receive data buffer. */
-	while (fifo_count) {
-		data   = read_reg(info, CHA + RXFIFO);
-		status = read_reg(info, CHA + RXFIFO);
-		fifo_count -= 2;
-
-		icount->rx++;
-		flag = TTY_NORMAL;
-
-		// if no frameing/crc error then save data
-		// BIT7:parity error
-		// BIT6:framing error
-
-		if (status & (BIT7 | BIT6)) {
-			if (status & BIT7)
-				icount->parity++;
-			else
-				icount->frame++;
-
-			/* discard char if tty control flags say so */
-			if (status & info->ignore_status_mask)
-				continue;
-
-			status &= info->read_status_mask;
-
-			if (status & BIT7)
-				flag = TTY_PARITY;
-			else if (status & BIT6)
-				flag = TTY_FRAME;
-		}
-		work += tty_insert_flip_char(port, data, flag);
-	}
-	issue_command(info, CHA, CMD_RXFIFO);
-
-	if (debug_level >= DEBUG_LEVEL_ISR) {
-		printk("%s(%d):rx_ready_async",
-			__FILE__,__LINE__);
-		printk("%s(%d):rx=%d brk=%d parity=%d frame=%d overrun=%d\n",
-			__FILE__,__LINE__,icount->rx,icount->brk,
-			icount->parity,icount->frame,icount->overrun);
-	}
-
-	if (work)
-		tty_flip_buffer_push(port);
-}
-
-
-static void tx_done(MGSLPC_INFO *info, struct tty_struct *tty)
-{
-	if (!info->tx_active)
-		return;
-
-	info->tx_active = false;
-	info->tx_aborting = false;
-
-	if (info->params.mode == MGSL_MODE_ASYNC)
-		return;
-
-	info->tx_count = info->tx_put = info->tx_get = 0;
-	del_timer(&info->tx_timer);
-
-	if (info->drop_rts_on_tx_done) {
-		get_signals(info);
-		if (info->serial_signals & SerialSignal_RTS) {
-			info->serial_signals &= ~SerialSignal_RTS;
-			set_signals(info);
-		}
-		info->drop_rts_on_tx_done = false;
-	}
-
-#if SYNCLINK_GENERIC_HDLC
-	if (info->netcount)
-		hdlcdev_tx_done(info);
-	else
-#endif
-	{
-		if (tty && (tty->flow.stopped || tty->hw_stopped)) {
-			tx_stop(info);
-			return;
-		}
-		info->pending_bh |= BH_TRANSMIT;
-	}
-}
-
-static void tx_ready(MGSLPC_INFO *info, struct tty_struct *tty)
-{
-	unsigned char fifo_count = 32;
-	int c;
-
-	if (debug_level >= DEBUG_LEVEL_ISR)
-		printk("%s(%d):tx_ready(%s)\n", __FILE__, __LINE__, info->device_name);
-
-	if (info->params.mode == MGSL_MODE_HDLC) {
-		if (!info->tx_active)
-			return;
-	} else {
-		if (tty && (tty->flow.stopped || tty->hw_stopped)) {
-			tx_stop(info);
-			return;
-		}
-		if (!info->tx_count)
-			info->tx_active = false;
-	}
-
-	if (!info->tx_count)
-		return;
-
-	while (info->tx_count && fifo_count) {
-		c = min(2, min_t(int, fifo_count, min(info->tx_count, TXBUFSIZE - info->tx_get)));
-
-		if (c == 1) {
-			write_reg(info, CHA + TXFIFO, *(info->tx_buf + info->tx_get));
-		} else {
-			write_reg16(info, CHA + TXFIFO,
-					  *((unsigned short*)(info->tx_buf + info->tx_get)));
-		}
-		info->tx_count -= c;
-		info->tx_get = (info->tx_get + c) & (TXBUFSIZE - 1);
-		fifo_count -= c;
-	}
-
-	if (info->params.mode == MGSL_MODE_ASYNC) {
-		if (info->tx_count < WAKEUP_CHARS)
-			info->pending_bh |= BH_TRANSMIT;
-		issue_command(info, CHA, CMD_TXFIFO);
-	} else {
-		if (info->tx_count)
-			issue_command(info, CHA, CMD_TXFIFO);
-		else
-			issue_command(info, CHA, CMD_TXFIFO + CMD_TXEOM);
-	}
-}
-
-static void cts_change(MGSLPC_INFO *info, struct tty_struct *tty)
-{
-	get_signals(info);
-	if ((info->cts_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT)
-		irq_disable(info, CHB, IRQ_CTS);
-	info->icount.cts++;
-	if (info->serial_signals & SerialSignal_CTS)
-		info->input_signal_events.cts_up++;
-	else
-		info->input_signal_events.cts_down++;
-	wake_up_interruptible(&info->status_event_wait_q);
-	wake_up_interruptible(&info->event_wait_q);
-
-	if (tty && tty_port_cts_enabled(&info->port)) {
-		if (tty->hw_stopped) {
-			if (info->serial_signals & SerialSignal_CTS) {
-				if (debug_level >= DEBUG_LEVEL_ISR)
-					printk("CTS tx start...");
-				tty->hw_stopped = 0;
-				tx_start(info, tty);
-				info->pending_bh |= BH_TRANSMIT;
-				return;
-			}
-		} else {
-			if (!(info->serial_signals & SerialSignal_CTS)) {
-				if (debug_level >= DEBUG_LEVEL_ISR)
-					printk("CTS tx stop...");
-				tty->hw_stopped = 1;
-				tx_stop(info);
-			}
-		}
-	}
-	info->pending_bh |= BH_STATUS;
-}
-
-static void dcd_change(MGSLPC_INFO *info, struct tty_struct *tty)
-{
-	get_signals(info);
-	if ((info->dcd_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT)
-		irq_disable(info, CHB, IRQ_DCD);
-	info->icount.dcd++;
-	if (info->serial_signals & SerialSignal_DCD) {
-		info->input_signal_events.dcd_up++;
-	}
-	else
-		info->input_signal_events.dcd_down++;
-#if SYNCLINK_GENERIC_HDLC
-	if (info->netcount) {
-		if (info->serial_signals & SerialSignal_DCD)
-			netif_carrier_on(info->netdev);
-		else
-			netif_carrier_off(info->netdev);
-	}
-#endif
-	wake_up_interruptible(&info->status_event_wait_q);
-	wake_up_interruptible(&info->event_wait_q);
-
-	if (tty_port_check_carrier(&info->port)) {
-		if (debug_level >= DEBUG_LEVEL_ISR)
-			printk("%s CD now %s...", info->device_name,
-			       (info->serial_signals & SerialSignal_DCD) ? "on" : "off");
-		if (info->serial_signals & SerialSignal_DCD)
-			wake_up_interruptible(&info->port.open_wait);
-		else {
-			if (debug_level >= DEBUG_LEVEL_ISR)
-				printk("doing serial hangup...");
-			if (tty)
-				tty_hangup(tty);
-		}
-	}
-	info->pending_bh |= BH_STATUS;
-}
-
-static void dsr_change(MGSLPC_INFO *info)
-{
-	get_signals(info);
-	if ((info->dsr_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT)
-		port_irq_disable(info, PVR_DSR);
-	info->icount.dsr++;
-	if (info->serial_signals & SerialSignal_DSR)
-		info->input_signal_events.dsr_up++;
-	else
-		info->input_signal_events.dsr_down++;
-	wake_up_interruptible(&info->status_event_wait_q);
-	wake_up_interruptible(&info->event_wait_q);
-	info->pending_bh |= BH_STATUS;
-}
-
-static void ri_change(MGSLPC_INFO *info)
-{
-	get_signals(info);
-	if ((info->ri_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT)
-		port_irq_disable(info, PVR_RI);
-	info->icount.rng++;
-	if (info->serial_signals & SerialSignal_RI)
-		info->input_signal_events.ri_up++;
-	else
-		info->input_signal_events.ri_down++;
-	wake_up_interruptible(&info->status_event_wait_q);
-	wake_up_interruptible(&info->event_wait_q);
-	info->pending_bh |= BH_STATUS;
-}
-
-/* Interrupt service routine entry point.
- *
- * Arguments:
- *
- * irq     interrupt number that caused interrupt
- * dev_id  device ID supplied during interrupt registration
- */
-static irqreturn_t mgslpc_isr(int dummy, void *dev_id)
-{
-	MGSLPC_INFO *info = dev_id;
-	struct tty_struct *tty;
-	unsigned short isr;
-	unsigned char gis, pis;
-	int count=0;
-
-	if (debug_level >= DEBUG_LEVEL_ISR)
-		printk("mgslpc_isr(%d) entry.\n", info->irq_level);
-
-	if (!(info->p_dev->_locked))
-		return IRQ_HANDLED;
-
-	tty = tty_port_tty_get(&info->port);
-
-	spin_lock(&info->lock);
-
-	while ((gis = read_reg(info, CHA + GIS))) {
-		if (debug_level >= DEBUG_LEVEL_ISR)
-			printk("mgslpc_isr %s gis=%04X\n", info->device_name,gis);
-
-		if ((gis & 0x70) || count > 1000) {
-			printk("synclink_cs:hardware failed or ejected\n");
-			break;
-		}
-		count++;
-
-		if (gis & (BIT1 | BIT0)) {
-			isr = read_reg16(info, CHB + ISR);
-			if (isr & IRQ_DCD)
-				dcd_change(info, tty);
-			if (isr & IRQ_CTS)
-				cts_change(info, tty);
-		}
-		if (gis & (BIT3 | BIT2))
-		{
-			isr = read_reg16(info, CHA + ISR);
-			if (isr & IRQ_TIMER) {
-				info->irq_occurred = true;
-				irq_disable(info, CHA, IRQ_TIMER);
-			}
-
-			/* receive IRQs */
-			if (isr & IRQ_EXITHUNT) {
-				info->icount.exithunt++;
-				wake_up_interruptible(&info->event_wait_q);
-			}
-			if (isr & IRQ_BREAK_ON) {
-				info->icount.brk++;
-				if (info->port.flags & ASYNC_SAK)
-					do_SAK(tty);
-			}
-			if (isr & IRQ_RXTIME) {
-				issue_command(info, CHA, CMD_RXFIFO_READ);
-			}
-			if (isr & (IRQ_RXEOM | IRQ_RXFIFO)) {
-				if (info->params.mode == MGSL_MODE_HDLC)
-					rx_ready_hdlc(info, isr & IRQ_RXEOM);
-				else
-					rx_ready_async(info, isr & IRQ_RXEOM);
-			}
-
-			/* transmit IRQs */
-			if (isr & IRQ_UNDERRUN) {
-				if (info->tx_aborting)
-					info->icount.txabort++;
-				else
-					info->icount.txunder++;
-				tx_done(info, tty);
-			}
-			else if (isr & IRQ_ALLSENT) {
-				info->icount.txok++;
-				tx_done(info, tty);
-			}
-			else if (isr & IRQ_TXFIFO)
-				tx_ready(info, tty);
-		}
-		if (gis & BIT7) {
-			pis = read_reg(info, CHA + PIS);
-			if (pis & BIT1)
-				dsr_change(info);
-			if (pis & BIT2)
-				ri_change(info);
-		}
-	}
-
-	/* Request bottom half processing if there's something
-	 * for it to do and the bh is not already running
-	 */
-
-	if (info->pending_bh && !info->bh_running && !info->bh_requested) {
-		if (debug_level >= DEBUG_LEVEL_ISR)
-			printk("%s(%d):%s queueing bh task.\n",
-				__FILE__,__LINE__,info->device_name);
-		schedule_work(&info->task);
-		info->bh_requested = true;
-	}
-
-	spin_unlock(&info->lock);
-	tty_kref_put(tty);
-
-	if (debug_level >= DEBUG_LEVEL_ISR)
-		printk("%s(%d):mgslpc_isr(%d)exit.\n",
-		       __FILE__, __LINE__, info->irq_level);
-
-	return IRQ_HANDLED;
-}
-
-/* Initialize and start device.
- */
-static int startup(MGSLPC_INFO * info, struct tty_struct *tty)
-{
-	int retval = 0;
-
-	if (debug_level >= DEBUG_LEVEL_INFO)
-		printk("%s(%d):startup(%s)\n", __FILE__, __LINE__, info->device_name);
-
-	if (tty_port_initialized(&info->port))
-		return 0;
-
-	if (!info->tx_buf) {
-		/* allocate a page of memory for a transmit buffer */
-		info->tx_buf = (unsigned char *)get_zeroed_page(GFP_KERNEL);
-		if (!info->tx_buf) {
-			printk(KERN_ERR"%s(%d):%s can't allocate transmit buffer\n",
-				__FILE__, __LINE__, info->device_name);
-			return -ENOMEM;
-		}
-	}
-
-	info->pending_bh = 0;
-
-	memset(&info->icount, 0, sizeof(info->icount));
-
-	timer_setup(&info->tx_timer, tx_timeout, 0);
-
-	/* Allocate and claim adapter resources */
-	retval = claim_resources(info);
-
-	/* perform existence check and diagnostics */
-	if (!retval)
-		retval = adapter_test(info);
-
-	if (retval) {
-		if (capable(CAP_SYS_ADMIN) && tty)
-			set_bit(TTY_IO_ERROR, &tty->flags);
-		release_resources(info);
-		return retval;
-	}
-
-	/* program hardware for current parameters */
-	mgslpc_change_params(info, tty);
-
-	if (tty)
-		clear_bit(TTY_IO_ERROR, &tty->flags);
-
-	tty_port_set_initialized(&info->port, true);
-
-	return 0;
-}
-
-/* Called by mgslpc_close() and mgslpc_hangup() to shutdown hardware
- */
-static void shutdown(MGSLPC_INFO * info, struct tty_struct *tty)
-{
-	unsigned long flags;
-
-	if (!tty_port_initialized(&info->port))
-		return;
-
-	if (debug_level >= DEBUG_LEVEL_INFO)
-		printk("%s(%d):mgslpc_shutdown(%s)\n",
-			 __FILE__, __LINE__, info->device_name);
-
-	/* clear status wait queue because status changes */
-	/* can't happen after shutting down the hardware */
-	wake_up_interruptible(&info->status_event_wait_q);
-	wake_up_interruptible(&info->event_wait_q);
-
-	del_timer_sync(&info->tx_timer);
-
-	if (info->tx_buf) {
-		free_page((unsigned long) info->tx_buf);
-		info->tx_buf = NULL;
-	}
-
-	spin_lock_irqsave(&info->lock, flags);
-
-	rx_stop(info);
-	tx_stop(info);
-
-	/* TODO:disable interrupts instead of reset to preserve signal states */
-	reset_device(info);
-
-	if (!tty || C_HUPCL(tty)) {
-		info->serial_signals &= ~(SerialSignal_RTS | SerialSignal_DTR);
-		set_signals(info);
-	}
-
-	spin_unlock_irqrestore(&info->lock, flags);
-
-	release_resources(info);
-
-	if (tty)
-		set_bit(TTY_IO_ERROR, &tty->flags);
-
-	tty_port_set_initialized(&info->port, false);
-}
-
-static void mgslpc_program_hw(MGSLPC_INFO *info, struct tty_struct *tty)
-{
-	unsigned long flags;
-
-	spin_lock_irqsave(&info->lock, flags);
-
-	rx_stop(info);
-	tx_stop(info);
-	info->tx_count = info->tx_put = info->tx_get = 0;
-
-	if (info->params.mode == MGSL_MODE_HDLC || info->netcount)
-		hdlc_mode(info);
-	else
-		async_mode(info);
-
-	set_signals(info);
-
-	info->dcd_chkcount = 0;
-	info->cts_chkcount = 0;
-	info->ri_chkcount = 0;
-	info->dsr_chkcount = 0;
-
-	irq_enable(info, CHB, IRQ_DCD | IRQ_CTS);
-	port_irq_enable(info, (unsigned char) PVR_DSR | PVR_RI);
-	get_signals(info);
-
-	if (info->netcount || (tty && C_CREAD(tty)))
-		rx_start(info);
-
-	spin_unlock_irqrestore(&info->lock, flags);
-}
-
-/* Reconfigure adapter based on new parameters
- */
-static void mgslpc_change_params(MGSLPC_INFO *info, struct tty_struct *tty)
-{
-	unsigned cflag;
-	int bits_per_char;
-
-	if (!tty)
-		return;
-
-	if (debug_level >= DEBUG_LEVEL_INFO)
-		printk("%s(%d):mgslpc_change_params(%s)\n",
-			 __FILE__, __LINE__, info->device_name);
-
-	cflag = tty->termios.c_cflag;
-
-	/* if B0 rate (hangup) specified then negate RTS and DTR */
-	/* otherwise assert RTS and DTR */
-	if (cflag & CBAUD)
-		info->serial_signals |= SerialSignal_RTS | SerialSignal_DTR;
-	else
-		info->serial_signals &= ~(SerialSignal_RTS | SerialSignal_DTR);
-
-	/* byte size and parity */
-	if ((cflag & CSIZE) != CS8) {
-		cflag &= ~CSIZE;
-		cflag |= CS7;
-		tty->termios.c_cflag = cflag;
-	}
-	info->params.data_bits = tty_get_char_size(cflag);
-
-	if (cflag & CSTOPB)
-		info->params.stop_bits = 2;
-	else
-		info->params.stop_bits = 1;
-
-	info->params.parity = ASYNC_PARITY_NONE;
-	if (cflag & PARENB) {
-		if (cflag & PARODD)
-			info->params.parity = ASYNC_PARITY_ODD;
-		else
-			info->params.parity = ASYNC_PARITY_EVEN;
-		if (cflag & CMSPAR)
-			info->params.parity = ASYNC_PARITY_SPACE;
-	}
-
-	/* calculate number of jiffies to transmit a full
-	 * FIFO (32 bytes) at specified data rate
-	 */
-	bits_per_char = info->params.data_bits +
-			info->params.stop_bits + 1;
-
-	/* if port data rate is set to 460800 or less then
-	 * allow tty settings to override, otherwise keep the
-	 * current data rate.
-	 */
-	if (info->params.data_rate <= 460800) {
-		info->params.data_rate = tty_get_baud_rate(tty);
-	}
-
-	if (info->params.data_rate) {
-		info->timeout = (32*HZ*bits_per_char) /
-				info->params.data_rate;
-	}
-	info->timeout += HZ/50;		/* Add .02 seconds of slop */
-
-	tty_port_set_cts_flow(&info->port, cflag & CRTSCTS);
-	tty_port_set_check_carrier(&info->port, ~cflag & CLOCAL);
-
-	/* process tty input control flags */
-
-	info->read_status_mask = 0;
-	if (I_INPCK(tty))
-		info->read_status_mask |= BIT7 | BIT6;
-	if (I_IGNPAR(tty))
-		info->ignore_status_mask |= BIT7 | BIT6;
-
-	mgslpc_program_hw(info, tty);
-}
-
-/* Add a character to the transmit buffer
- */
-static int mgslpc_put_char(struct tty_struct *tty, unsigned char ch)
-{
-	MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
-	unsigned long flags;
-
-	if (debug_level >= DEBUG_LEVEL_INFO) {
-		printk("%s(%d):mgslpc_put_char(%d) on %s\n",
-			__FILE__, __LINE__, ch, info->device_name);
-	}
-
-	if (mgslpc_paranoia_check(info, tty->name, "mgslpc_put_char"))
-		return 0;
-
-	if (!info->tx_buf)
-		return 0;
-
-	spin_lock_irqsave(&info->lock, flags);
-
-	if (info->params.mode == MGSL_MODE_ASYNC || !info->tx_active) {
-		if (info->tx_count < TXBUFSIZE - 1) {
-			info->tx_buf[info->tx_put++] = ch;
-			info->tx_put &= TXBUFSIZE-1;
-			info->tx_count++;
-		}
-	}
-
-	spin_unlock_irqrestore(&info->lock, flags);
-	return 1;
-}
-
-/* Enable transmitter so remaining characters in the
- * transmit buffer are sent.
- */
-static void mgslpc_flush_chars(struct tty_struct *tty)
-{
-	MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
-	unsigned long flags;
-
-	if (debug_level >= DEBUG_LEVEL_INFO)
-		printk("%s(%d):mgslpc_flush_chars() entry on %s tx_count=%d\n",
-			__FILE__, __LINE__, info->device_name, info->tx_count);
-
-	if (mgslpc_paranoia_check(info, tty->name, "mgslpc_flush_chars"))
-		return;
-
-	if (info->tx_count <= 0 || tty->flow.stopped ||
-	    tty->hw_stopped || !info->tx_buf)
-		return;
-
-	if (debug_level >= DEBUG_LEVEL_INFO)
-		printk("%s(%d):mgslpc_flush_chars() entry on %s starting transmitter\n",
-			__FILE__, __LINE__, info->device_name);
-
-	spin_lock_irqsave(&info->lock, flags);
-	if (!info->tx_active)
-		tx_start(info, tty);
-	spin_unlock_irqrestore(&info->lock, flags);
-}
-
-/* Send a block of data
- *
- * Arguments:
- *
- * tty        pointer to tty information structure
- * buf	      pointer to buffer containing send data
- * count      size of send data in bytes
- *
- * Returns: number of characters written
- */
-static int mgslpc_write(struct tty_struct * tty,
-			const unsigned char *buf, int count)
-{
-	int c, ret = 0;
-	MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
-	unsigned long flags;
-
-	if (debug_level >= DEBUG_LEVEL_INFO)
-		printk("%s(%d):mgslpc_write(%s) count=%d\n",
-			__FILE__, __LINE__, info->device_name, count);
-
-	if (mgslpc_paranoia_check(info, tty->name, "mgslpc_write") ||
-		!info->tx_buf)
-		goto cleanup;
-
-	if (info->params.mode == MGSL_MODE_HDLC) {
-		if (count > TXBUFSIZE) {
-			ret = -EIO;
-			goto cleanup;
-		}
-		if (info->tx_active)
-			goto cleanup;
-		else if (info->tx_count)
-			goto start;
-	}
-
-	for (;;) {
-		c = min(count,
-			min(TXBUFSIZE - info->tx_count - 1,
-			    TXBUFSIZE - info->tx_put));
-		if (c <= 0)
-			break;
-
-		memcpy(info->tx_buf + info->tx_put, buf, c);
-
-		spin_lock_irqsave(&info->lock, flags);
-		info->tx_put = (info->tx_put + c) & (TXBUFSIZE-1);
-		info->tx_count += c;
-		spin_unlock_irqrestore(&info->lock, flags);
-
-		buf += c;
-		count -= c;
-		ret += c;
-	}
-start:
-	if (info->tx_count && !tty->flow.stopped && !tty->hw_stopped) {
-		spin_lock_irqsave(&info->lock, flags);
-		if (!info->tx_active)
-			tx_start(info, tty);
-		spin_unlock_irqrestore(&info->lock, flags);
-	}
-cleanup:
-	if (debug_level >= DEBUG_LEVEL_INFO)
-		printk("%s(%d):mgslpc_write(%s) returning=%d\n",
-			__FILE__, __LINE__, info->device_name, ret);
-	return ret;
-}
-
-/* Return the count of free bytes in transmit buffer
- */
-static unsigned int mgslpc_write_room(struct tty_struct *tty)
-{
-	MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
-	int ret;
-
-	if (mgslpc_paranoia_check(info, tty->name, "mgslpc_write_room"))
-		return 0;
-
-	if (info->params.mode == MGSL_MODE_HDLC) {
-		/* HDLC (frame oriented) mode */
-		if (info->tx_active)
-			return 0;
-		else
-			return HDLC_MAX_FRAME_SIZE;
-	} else {
-		ret = TXBUFSIZE - info->tx_count - 1;
-		if (ret < 0)
-			ret = 0;
-	}
-
-	if (debug_level >= DEBUG_LEVEL_INFO)
-		printk("%s(%d):mgslpc_write_room(%s)=%d\n",
-			 __FILE__, __LINE__, info->device_name, ret);
-	return ret;
-}
-
-/* Return the count of bytes in transmit buffer
- */
-static unsigned int mgslpc_chars_in_buffer(struct tty_struct *tty)
-{
-	MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
-	unsigned int rc;
-
-	if (debug_level >= DEBUG_LEVEL_INFO)
-		printk("%s(%d):mgslpc_chars_in_buffer(%s)\n",
-			 __FILE__, __LINE__, info->device_name);
-
-	if (mgslpc_paranoia_check(info, tty->name, "mgslpc_chars_in_buffer"))
-		return 0;
-
-	if (info->params.mode == MGSL_MODE_HDLC)
-		rc = info->tx_active ? info->max_frame_size : 0;
-	else
-		rc = info->tx_count;
-
-	if (debug_level >= DEBUG_LEVEL_INFO)
-		printk("%s(%d):mgslpc_chars_in_buffer(%s)=%u\n",
-			 __FILE__, __LINE__, info->device_name, rc);
-
-	return rc;
-}
-
-/* Discard all data in the send buffer
- */
-static void mgslpc_flush_buffer(struct tty_struct *tty)
-{
-	MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
-	unsigned long flags;
-
-	if (debug_level >= DEBUG_LEVEL_INFO)
-		printk("%s(%d):mgslpc_flush_buffer(%s) entry\n",
-			 __FILE__, __LINE__, info->device_name);
-
-	if (mgslpc_paranoia_check(info, tty->name, "mgslpc_flush_buffer"))
-		return;
-
-	spin_lock_irqsave(&info->lock, flags);
-	info->tx_count = info->tx_put = info->tx_get = 0;
-	del_timer(&info->tx_timer);
-	spin_unlock_irqrestore(&info->lock, flags);
-
-	wake_up_interruptible(&tty->write_wait);
-	tty_wakeup(tty);
-}
-
-/* Send a high-priority XON/XOFF character
- */
-static void mgslpc_send_xchar(struct tty_struct *tty, char ch)
-{
-	MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
-	unsigned long flags;
-
-	if (debug_level >= DEBUG_LEVEL_INFO)
-		printk("%s(%d):mgslpc_send_xchar(%s,%d)\n",
-			 __FILE__, __LINE__, info->device_name, ch);
-
-	if (mgslpc_paranoia_check(info, tty->name, "mgslpc_send_xchar"))
-		return;
-
-	info->x_char = ch;
-	if (ch) {
-		spin_lock_irqsave(&info->lock, flags);
-		if (!info->tx_enabled)
-			tx_start(info, tty);
-		spin_unlock_irqrestore(&info->lock, flags);
-	}
-}
-
-/* Signal remote device to throttle send data (our receive data)
- */
-static void mgslpc_throttle(struct tty_struct * tty)
-{
-	MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
-	unsigned long flags;
-
-	if (debug_level >= DEBUG_LEVEL_INFO)
-		printk("%s(%d):mgslpc_throttle(%s) entry\n",
-			 __FILE__, __LINE__, info->device_name);
-
-	if (mgslpc_paranoia_check(info, tty->name, "mgslpc_throttle"))
-		return;
-
-	if (I_IXOFF(tty))
-		mgslpc_send_xchar(tty, STOP_CHAR(tty));
-
-	if (C_CRTSCTS(tty)) {
-		spin_lock_irqsave(&info->lock, flags);
-		info->serial_signals &= ~SerialSignal_RTS;
-		set_signals(info);
-		spin_unlock_irqrestore(&info->lock, flags);
-	}
-}
-
-/* Signal remote device to stop throttling send data (our receive data)
- */
-static void mgslpc_unthrottle(struct tty_struct * tty)
-{
-	MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
-	unsigned long flags;
-
-	if (debug_level >= DEBUG_LEVEL_INFO)
-		printk("%s(%d):mgslpc_unthrottle(%s) entry\n",
-			 __FILE__, __LINE__, info->device_name);
-
-	if (mgslpc_paranoia_check(info, tty->name, "mgslpc_unthrottle"))
-		return;
-
-	if (I_IXOFF(tty)) {
-		if (info->x_char)
-			info->x_char = 0;
-		else
-			mgslpc_send_xchar(tty, START_CHAR(tty));
-	}
-
-	if (C_CRTSCTS(tty)) {
-		spin_lock_irqsave(&info->lock, flags);
-		info->serial_signals |= SerialSignal_RTS;
-		set_signals(info);
-		spin_unlock_irqrestore(&info->lock, flags);
-	}
-}
-
-/* get the current serial statistics
- */
-static int get_stats(MGSLPC_INFO * info, struct mgsl_icount __user *user_icount)
-{
-	int err;
-	if (debug_level >= DEBUG_LEVEL_INFO)
-		printk("get_params(%s)\n", info->device_name);
-	if (!user_icount) {
-		memset(&info->icount, 0, sizeof(info->icount));
-	} else {
-		COPY_TO_USER(err, user_icount, &info->icount, sizeof(struct mgsl_icount));
-		if (err)
-			return -EFAULT;
-	}
-	return 0;
-}
-
-/* get the current serial parameters
- */
-static int get_params(MGSLPC_INFO * info, MGSL_PARAMS __user *user_params)
-{
-	int err;
-	if (debug_level >= DEBUG_LEVEL_INFO)
-		printk("get_params(%s)\n", info->device_name);
-	COPY_TO_USER(err,user_params, &info->params, sizeof(MGSL_PARAMS));
-	if (err)
-		return -EFAULT;
-	return 0;
-}
-
-/* set the serial parameters
- *
- * Arguments:
- *
- *	info		pointer to device instance data
- *	new_params	user buffer containing new serial params
- *
- * Returns:	0 if success, otherwise error code
- */
-static int set_params(MGSLPC_INFO * info, MGSL_PARAMS __user *new_params, struct tty_struct *tty)
-{
-	unsigned long flags;
-	MGSL_PARAMS tmp_params;
-	int err;
-
-	if (debug_level >= DEBUG_LEVEL_INFO)
-		printk("%s(%d):set_params %s\n", __FILE__,__LINE__,
-			info->device_name);
-	COPY_FROM_USER(err,&tmp_params, new_params, sizeof(MGSL_PARAMS));
-	if (err) {
-		if (debug_level >= DEBUG_LEVEL_INFO)
-			printk("%s(%d):set_params(%s) user buffer copy failed\n",
-				__FILE__, __LINE__, info->device_name);
-		return -EFAULT;
-	}
-
-	spin_lock_irqsave(&info->lock, flags);
-	memcpy(&info->params,&tmp_params,sizeof(MGSL_PARAMS));
-	spin_unlock_irqrestore(&info->lock, flags);
-
-	mgslpc_change_params(info, tty);
-
-	return 0;
-}
-
-static int get_txidle(MGSLPC_INFO * info, int __user *idle_mode)
-{
-	int err;
-	if (debug_level >= DEBUG_LEVEL_INFO)
-		printk("get_txidle(%s)=%d\n", info->device_name, info->idle_mode);
-	COPY_TO_USER(err,idle_mode, &info->idle_mode, sizeof(int));
-	if (err)
-		return -EFAULT;
-	return 0;
-}
-
-static int set_txidle(MGSLPC_INFO * info, int idle_mode)
-{
-	unsigned long flags;
-	if (debug_level >= DEBUG_LEVEL_INFO)
-		printk("set_txidle(%s,%d)\n", info->device_name, idle_mode);
-	spin_lock_irqsave(&info->lock, flags);
-	info->idle_mode = idle_mode;
-	tx_set_idle(info);
-	spin_unlock_irqrestore(&info->lock, flags);
-	return 0;
-}
-
-static int get_interface(MGSLPC_INFO * info, int __user *if_mode)
-{
-	int err;
-	if (debug_level >= DEBUG_LEVEL_INFO)
-		printk("get_interface(%s)=%d\n", info->device_name, info->if_mode);
-	COPY_TO_USER(err,if_mode, &info->if_mode, sizeof(int));
-	if (err)
-		return -EFAULT;
-	return 0;
-}
-
-static int set_interface(MGSLPC_INFO * info, int if_mode)
-{
-	unsigned long flags;
-	unsigned char val;
-	if (debug_level >= DEBUG_LEVEL_INFO)
-		printk("set_interface(%s,%d)\n", info->device_name, if_mode);
-	spin_lock_irqsave(&info->lock, flags);
-	info->if_mode = if_mode;
-
-	val = read_reg(info, PVR) & 0x0f;
-	switch (info->if_mode)
-	{
-	case MGSL_INTERFACE_RS232: val |= PVR_RS232; break;
-	case MGSL_INTERFACE_V35:   val |= PVR_V35;   break;
-	case MGSL_INTERFACE_RS422: val |= PVR_RS422; break;
-	}
-	write_reg(info, PVR, val);
-
-	spin_unlock_irqrestore(&info->lock, flags);
-	return 0;
-}
-
-static int set_txenable(MGSLPC_INFO * info, int enable, struct tty_struct *tty)
-{
-	unsigned long flags;
-
-	if (debug_level >= DEBUG_LEVEL_INFO)
-		printk("set_txenable(%s,%d)\n", info->device_name, enable);
-
-	spin_lock_irqsave(&info->lock, flags);
-	if (enable) {
-		if (!info->tx_enabled)
-			tx_start(info, tty);
-	} else {
-		if (info->tx_enabled)
-			tx_stop(info);
-	}
-	spin_unlock_irqrestore(&info->lock, flags);
-	return 0;
-}
-
-static int tx_abort(MGSLPC_INFO * info)
-{
-	unsigned long flags;
-
-	if (debug_level >= DEBUG_LEVEL_INFO)
-		printk("tx_abort(%s)\n", info->device_name);
-
-	spin_lock_irqsave(&info->lock, flags);
-	if (info->tx_active && info->tx_count &&
-	    info->params.mode == MGSL_MODE_HDLC) {
-		/* clear data count so FIFO is not filled on next IRQ.
-		 * This results in underrun and abort transmission.
-		 */
-		info->tx_count = info->tx_put = info->tx_get = 0;
-		info->tx_aborting = true;
-	}
-	spin_unlock_irqrestore(&info->lock, flags);
-	return 0;
-}
-
-static int set_rxenable(MGSLPC_INFO * info, int enable)
-{
-	unsigned long flags;
-
-	if (debug_level >= DEBUG_LEVEL_INFO)
-		printk("set_rxenable(%s,%d)\n", info->device_name, enable);
-
-	spin_lock_irqsave(&info->lock, flags);
-	if (enable) {
-		if (!info->rx_enabled)
-			rx_start(info);
-	} else {
-		if (info->rx_enabled)
-			rx_stop(info);
-	}
-	spin_unlock_irqrestore(&info->lock, flags);
-	return 0;
-}
-
-/* wait for specified event to occur
- *
- * Arguments:		info	pointer to device instance data
- *			mask	pointer to bitmask of events to wait for
- * Return Value:	0	if successful and bit mask updated with
- *				of events triggerred,
- *			otherwise error code
- */
-static int wait_events(MGSLPC_INFO * info, int __user *mask_ptr)
-{
-	unsigned long flags;
-	int s;
-	int rc=0;
-	struct mgsl_icount cprev, cnow;
-	int events;
-	int mask;
-	struct	_input_signal_events oldsigs, newsigs;
-	DECLARE_WAITQUEUE(wait, current);
-
-	COPY_FROM_USER(rc,&mask, mask_ptr, sizeof(int));
-	if (rc)
-		return  -EFAULT;
-
-	if (debug_level >= DEBUG_LEVEL_INFO)
-		printk("wait_events(%s,%d)\n", info->device_name, mask);
-
-	spin_lock_irqsave(&info->lock, flags);
-
-	/* return immediately if state matches requested events */
-	get_signals(info);
-	s = info->serial_signals;
-	events = mask &
-		( ((s & SerialSignal_DSR) ? MgslEvent_DsrActive:MgslEvent_DsrInactive) +
-		  ((s & SerialSignal_DCD) ? MgslEvent_DcdActive:MgslEvent_DcdInactive) +
-		  ((s & SerialSignal_CTS) ? MgslEvent_CtsActive:MgslEvent_CtsInactive) +
-		  ((s & SerialSignal_RI)  ? MgslEvent_RiActive :MgslEvent_RiInactive) );
-	if (events) {
-		spin_unlock_irqrestore(&info->lock, flags);
-		goto exit;
-	}
-
-	/* save current irq counts */
-	cprev = info->icount;
-	oldsigs = info->input_signal_events;
-
-	if ((info->params.mode == MGSL_MODE_HDLC) &&
-	    (mask & MgslEvent_ExitHuntMode))
-		irq_enable(info, CHA, IRQ_EXITHUNT);
-
-	set_current_state(TASK_INTERRUPTIBLE);
-	add_wait_queue(&info->event_wait_q, &wait);
-
-	spin_unlock_irqrestore(&info->lock, flags);
-
-
-	for(;;) {
-		schedule();
-		if (signal_pending(current)) {
-			rc = -ERESTARTSYS;
-			break;
-		}
-
-		/* get current irq counts */
-		spin_lock_irqsave(&info->lock, flags);
-		cnow = info->icount;
-		newsigs = info->input_signal_events;
-		set_current_state(TASK_INTERRUPTIBLE);
-		spin_unlock_irqrestore(&info->lock, flags);
-
-		/* if no change, wait aborted for some reason */
-		if (newsigs.dsr_up   == oldsigs.dsr_up   &&
-		    newsigs.dsr_down == oldsigs.dsr_down &&
-		    newsigs.dcd_up   == oldsigs.dcd_up   &&
-		    newsigs.dcd_down == oldsigs.dcd_down &&
-		    newsigs.cts_up   == oldsigs.cts_up   &&
-		    newsigs.cts_down == oldsigs.cts_down &&
-		    newsigs.ri_up    == oldsigs.ri_up    &&
-		    newsigs.ri_down  == oldsigs.ri_down  &&
-		    cnow.exithunt    == cprev.exithunt   &&
-		    cnow.rxidle      == cprev.rxidle) {
-			rc = -EIO;
-			break;
-		}
-
-		events = mask &
-			( (newsigs.dsr_up   != oldsigs.dsr_up   ? MgslEvent_DsrActive:0)   +
-			  (newsigs.dsr_down != oldsigs.dsr_down ? MgslEvent_DsrInactive:0) +
-			  (newsigs.dcd_up   != oldsigs.dcd_up   ? MgslEvent_DcdActive:0)   +
-			  (newsigs.dcd_down != oldsigs.dcd_down ? MgslEvent_DcdInactive:0) +
-			  (newsigs.cts_up   != oldsigs.cts_up   ? MgslEvent_CtsActive:0)   +
-			  (newsigs.cts_down != oldsigs.cts_down ? MgslEvent_CtsInactive:0) +
-			  (newsigs.ri_up    != oldsigs.ri_up    ? MgslEvent_RiActive:0)    +
-			  (newsigs.ri_down  != oldsigs.ri_down  ? MgslEvent_RiInactive:0)  +
-			  (cnow.exithunt    != cprev.exithunt   ? MgslEvent_ExitHuntMode:0) +
-			  (cnow.rxidle      != cprev.rxidle     ? MgslEvent_IdleReceived:0) );
-		if (events)
-			break;
-
-		cprev = cnow;
-		oldsigs = newsigs;
-	}
-
-	remove_wait_queue(&info->event_wait_q, &wait);
-	set_current_state(TASK_RUNNING);
-
-	if (mask & MgslEvent_ExitHuntMode) {
-		spin_lock_irqsave(&info->lock, flags);
-		if (!waitqueue_active(&info->event_wait_q))
-			irq_disable(info, CHA, IRQ_EXITHUNT);
-		spin_unlock_irqrestore(&info->lock, flags);
-	}
-exit:
-	if (rc == 0)
-		PUT_USER(rc, events, mask_ptr);
-	return rc;
-}
-
-static int modem_input_wait(MGSLPC_INFO *info,int arg)
-{
-	unsigned long flags;
-	int rc;
-	struct mgsl_icount cprev, cnow;
-	DECLARE_WAITQUEUE(wait, current);
-
-	/* save current irq counts */
-	spin_lock_irqsave(&info->lock, flags);
-	cprev = info->icount;
-	add_wait_queue(&info->status_event_wait_q, &wait);
-	set_current_state(TASK_INTERRUPTIBLE);
-	spin_unlock_irqrestore(&info->lock, flags);
-
-	for(;;) {
-		schedule();
-		if (signal_pending(current)) {
-			rc = -ERESTARTSYS;
-			break;
-		}
-
-		/* get new irq counts */
-		spin_lock_irqsave(&info->lock, flags);
-		cnow = info->icount;
-		set_current_state(TASK_INTERRUPTIBLE);
-		spin_unlock_irqrestore(&info->lock, flags);
-
-		/* if no change, wait aborted for some reason */
-		if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
-		    cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) {
-			rc = -EIO;
-			break;
-		}
-
-		/* check for change in caller specified modem input */
-		if ((arg & TIOCM_RNG && cnow.rng != cprev.rng) ||
-		    (arg & TIOCM_DSR && cnow.dsr != cprev.dsr) ||
-		    (arg & TIOCM_CD  && cnow.dcd != cprev.dcd) ||
-		    (arg & TIOCM_CTS && cnow.cts != cprev.cts)) {
-			rc = 0;
-			break;
-		}
-
-		cprev = cnow;
-	}
-	remove_wait_queue(&info->status_event_wait_q, &wait);
-	set_current_state(TASK_RUNNING);
-	return rc;
-}
-
-/* return the state of the serial control and status signals
- */
-static int tiocmget(struct tty_struct *tty)
-{
-	MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
-	unsigned int result;
-	unsigned long flags;
-
-	spin_lock_irqsave(&info->lock, flags);
-	get_signals(info);
-	spin_unlock_irqrestore(&info->lock, flags);
-
-	result = ((info->serial_signals & SerialSignal_RTS) ? TIOCM_RTS:0) +
-		((info->serial_signals & SerialSignal_DTR) ? TIOCM_DTR:0) +
-		((info->serial_signals & SerialSignal_DCD) ? TIOCM_CAR:0) +
-		((info->serial_signals & SerialSignal_RI)  ? TIOCM_RNG:0) +
-		((info->serial_signals & SerialSignal_DSR) ? TIOCM_DSR:0) +
-		((info->serial_signals & SerialSignal_CTS) ? TIOCM_CTS:0);
-
-	if (debug_level >= DEBUG_LEVEL_INFO)
-		printk("%s(%d):%s tiocmget() value=%08X\n",
-			 __FILE__, __LINE__, info->device_name, result);
-	return result;
-}
-
-/* set modem control signals (DTR/RTS)
- */
-static int tiocmset(struct tty_struct *tty,
-		    unsigned int set, unsigned int clear)
-{
-	MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
-	unsigned long flags;
-
-	if (debug_level >= DEBUG_LEVEL_INFO)
-		printk("%s(%d):%s tiocmset(%x,%x)\n",
-			__FILE__, __LINE__, info->device_name, set, clear);
-
-	if (set & TIOCM_RTS)
-		info->serial_signals |= SerialSignal_RTS;
-	if (set & TIOCM_DTR)
-		info->serial_signals |= SerialSignal_DTR;
-	if (clear & TIOCM_RTS)
-		info->serial_signals &= ~SerialSignal_RTS;
-	if (clear & TIOCM_DTR)
-		info->serial_signals &= ~SerialSignal_DTR;
-
-	spin_lock_irqsave(&info->lock, flags);
-	set_signals(info);
-	spin_unlock_irqrestore(&info->lock, flags);
-
-	return 0;
-}
-
-/* Set or clear transmit break condition
- *
- * Arguments:		tty		pointer to tty instance data
- *			break_state	-1=set break condition, 0=clear
- */
-static int mgslpc_break(struct tty_struct *tty, int break_state)
-{
-	MGSLPC_INFO * info = (MGSLPC_INFO *)tty->driver_data;
-	unsigned long flags;
-
-	if (debug_level >= DEBUG_LEVEL_INFO)
-		printk("%s(%d):mgslpc_break(%s,%d)\n",
-			 __FILE__, __LINE__, info->device_name, break_state);
-
-	if (mgslpc_paranoia_check(info, tty->name, "mgslpc_break"))
-		return -EINVAL;
-
-	spin_lock_irqsave(&info->lock, flags);
-	if (break_state == -1)
-		set_reg_bits(info, CHA+DAFO, BIT6);
-	else
-		clear_reg_bits(info, CHA+DAFO, BIT6);
-	spin_unlock_irqrestore(&info->lock, flags);
-	return 0;
-}
-
-static int mgslpc_get_icount(struct tty_struct *tty,
-				struct serial_icounter_struct *icount)
-{
-	MGSLPC_INFO * info = (MGSLPC_INFO *)tty->driver_data;
-	struct mgsl_icount cnow;	/* kernel counter temps */
-	unsigned long flags;
-
-	spin_lock_irqsave(&info->lock, flags);
-	cnow = info->icount;
-	spin_unlock_irqrestore(&info->lock, flags);
-
-	icount->cts = cnow.cts;
-	icount->dsr = cnow.dsr;
-	icount->rng = cnow.rng;
-	icount->dcd = cnow.dcd;
-	icount->rx = cnow.rx;
-	icount->tx = cnow.tx;
-	icount->frame = cnow.frame;
-	icount->overrun = cnow.overrun;
-	icount->parity = cnow.parity;
-	icount->brk = cnow.brk;
-	icount->buf_overrun = cnow.buf_overrun;
-
-	return 0;
-}
-
-/* Service an IOCTL request
- *
- * Arguments:
- *
- *	tty	pointer to tty instance data
- *	cmd	IOCTL command code
- *	arg	command argument/context
- *
- * Return Value:	0 if success, otherwise error code
- */
-static int mgslpc_ioctl(struct tty_struct *tty,
-			unsigned int cmd, unsigned long arg)
-{
-	MGSLPC_INFO * info = (MGSLPC_INFO *)tty->driver_data;
-	void __user *argp = (void __user *)arg;
-
-	if (debug_level >= DEBUG_LEVEL_INFO)
-		printk("%s(%d):mgslpc_ioctl %s cmd=%08X\n", __FILE__, __LINE__,
-			info->device_name, cmd);
-
-	if (mgslpc_paranoia_check(info, tty->name, "mgslpc_ioctl"))
-		return -ENODEV;
-
-	if (cmd != TIOCMIWAIT) {
-		if (tty_io_error(tty))
-		    return -EIO;
-	}
-
-	switch (cmd) {
-	case MGSL_IOCGPARAMS:
-		return get_params(info, argp);
-	case MGSL_IOCSPARAMS:
-		return set_params(info, argp, tty);
-	case MGSL_IOCGTXIDLE:
-		return get_txidle(info, argp);
-	case MGSL_IOCSTXIDLE:
-		return set_txidle(info, (int)arg);
-	case MGSL_IOCGIF:
-		return get_interface(info, argp);
-	case MGSL_IOCSIF:
-		return set_interface(info,(int)arg);
-	case MGSL_IOCTXENABLE:
-		return set_txenable(info,(int)arg, tty);
-	case MGSL_IOCRXENABLE:
-		return set_rxenable(info,(int)arg);
-	case MGSL_IOCTXABORT:
-		return tx_abort(info);
-	case MGSL_IOCGSTATS:
-		return get_stats(info, argp);
-	case MGSL_IOCWAITEVENT:
-		return wait_events(info, argp);
-	case TIOCMIWAIT:
-		return modem_input_wait(info,(int)arg);
-	default:
-		return -ENOIOCTLCMD;
-	}
-	return 0;
-}
-
-/* Set new termios settings
- *
- * Arguments:
- *
- *	tty		pointer to tty structure
- *	termios		pointer to buffer to hold returned old termios
- */
-static void mgslpc_set_termios(struct tty_struct *tty,
-			       const struct ktermios *old_termios)
-{
-	MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
-	unsigned long flags;
-
-	if (debug_level >= DEBUG_LEVEL_INFO)
-		printk("%s(%d):mgslpc_set_termios %s\n", __FILE__, __LINE__,
-			tty->driver->name);
-
-	/* just return if nothing has changed */
-	if ((tty->termios.c_cflag == old_termios->c_cflag)
-	    && (RELEVANT_IFLAG(tty->termios.c_iflag)
-		== RELEVANT_IFLAG(old_termios->c_iflag)))
-	  return;
-
-	mgslpc_change_params(info, tty);
-
-	/* Handle transition to B0 status */
-	if ((old_termios->c_cflag & CBAUD) && !C_BAUD(tty)) {
-		info->serial_signals &= ~(SerialSignal_RTS | SerialSignal_DTR);
-		spin_lock_irqsave(&info->lock, flags);
-		set_signals(info);
-		spin_unlock_irqrestore(&info->lock, flags);
-	}
-
-	/* Handle transition away from B0 status */
-	if (!(old_termios->c_cflag & CBAUD) && C_BAUD(tty)) {
-		info->serial_signals |= SerialSignal_DTR;
-		if (!C_CRTSCTS(tty) || !tty_throttled(tty))
-			info->serial_signals |= SerialSignal_RTS;
-		spin_lock_irqsave(&info->lock, flags);
-		set_signals(info);
-		spin_unlock_irqrestore(&info->lock, flags);
-	}
-
-	/* Handle turning off CRTSCTS */
-	if (old_termios->c_cflag & CRTSCTS && !C_CRTSCTS(tty)) {
-		tty->hw_stopped = 0;
-		tx_release(tty);
-	}
-}
-
-static void mgslpc_close(struct tty_struct *tty, struct file * filp)
-{
-	MGSLPC_INFO * info = (MGSLPC_INFO *)tty->driver_data;
-	struct tty_port *port = &info->port;
-
-	if (mgslpc_paranoia_check(info, tty->name, "mgslpc_close"))
-		return;
-
-	if (debug_level >= DEBUG_LEVEL_INFO)
-		printk("%s(%d):mgslpc_close(%s) entry, count=%d\n",
-			 __FILE__, __LINE__, info->device_name, port->count);
-
-	if (tty_port_close_start(port, tty, filp) == 0)
-		goto cleanup;
-
-	if (tty_port_initialized(port))
-		mgslpc_wait_until_sent(tty, info->timeout);
-
-	mgslpc_flush_buffer(tty);
-
-	tty_ldisc_flush(tty);
-	shutdown(info, tty);
-	
-	tty_port_close_end(port, tty);
-	tty_port_tty_set(port, NULL);
-cleanup:
-	if (debug_level >= DEBUG_LEVEL_INFO)
-		printk("%s(%d):mgslpc_close(%s) exit, count=%d\n", __FILE__, __LINE__,
-			tty->driver->name, port->count);
-}
-
-/* Wait until the transmitter is empty.
- */
-static void mgslpc_wait_until_sent(struct tty_struct *tty, int timeout)
-{
-	MGSLPC_INFO * info = (MGSLPC_INFO *)tty->driver_data;
-	unsigned long orig_jiffies, char_time;
-
-	if (!info)
-		return;
-
-	if (debug_level >= DEBUG_LEVEL_INFO)
-		printk("%s(%d):mgslpc_wait_until_sent(%s) entry\n",
-			 __FILE__, __LINE__, info->device_name);
-
-	if (mgslpc_paranoia_check(info, tty->name, "mgslpc_wait_until_sent"))
-		return;
-
-	if (!tty_port_initialized(&info->port))
-		goto exit;
-
-	orig_jiffies = jiffies;
-
-	/* Set check interval to 1/5 of estimated time to
-	 * send a character, and make it at least 1. The check
-	 * interval should also be less than the timeout.
-	 * Note: use tight timings here to satisfy the NIST-PCTS.
-	 */
-
-	if (info->params.data_rate) {
-	     	char_time = info->timeout/(32 * 5);
-		if (!char_time)
-			char_time++;
-	} else
-		char_time = 1;
-
-	if (timeout)
-		char_time = min_t(unsigned long, char_time, timeout);
-
-	if (info->params.mode == MGSL_MODE_HDLC) {
-		while (info->tx_active) {
-			msleep_interruptible(jiffies_to_msecs(char_time));
-			if (signal_pending(current))
-				break;
-			if (timeout && time_after(jiffies, orig_jiffies + timeout))
-				break;
-		}
-	} else {
-		while ((info->tx_count || info->tx_active) &&
-			info->tx_enabled) {
-			msleep_interruptible(jiffies_to_msecs(char_time));
-			if (signal_pending(current))
-				break;
-			if (timeout && time_after(jiffies, orig_jiffies + timeout))
-				break;
-		}
-	}
-
-exit:
-	if (debug_level >= DEBUG_LEVEL_INFO)
-		printk("%s(%d):mgslpc_wait_until_sent(%s) exit\n",
-			 __FILE__, __LINE__, info->device_name);
-}
-
-/* Called by tty_hangup() when a hangup is signaled.
- * This is the same as closing all open files for the port.
- */
-static void mgslpc_hangup(struct tty_struct *tty)
-{
-	MGSLPC_INFO * info = (MGSLPC_INFO *)tty->driver_data;
-
-	if (debug_level >= DEBUG_LEVEL_INFO)
-		printk("%s(%d):mgslpc_hangup(%s)\n",
-			 __FILE__, __LINE__, info->device_name);
-
-	if (mgslpc_paranoia_check(info, tty->name, "mgslpc_hangup"))
-		return;
-
-	mgslpc_flush_buffer(tty);
-	shutdown(info, tty);
-	tty_port_hangup(&info->port);
-}
-
-static bool carrier_raised(struct tty_port *port)
-{
-	MGSLPC_INFO *info = container_of(port, MGSLPC_INFO, port);
-	unsigned long flags;
-
-	spin_lock_irqsave(&info->lock, flags);
-	get_signals(info);
-	spin_unlock_irqrestore(&info->lock, flags);
-
-	return info->serial_signals & SerialSignal_DCD;
-}
-
-static void dtr_rts(struct tty_port *port, bool active)
-{
-	MGSLPC_INFO *info = container_of(port, MGSLPC_INFO, port);
-	unsigned long flags;
-
-	spin_lock_irqsave(&info->lock, flags);
-	if (active)
-		info->serial_signals |= SerialSignal_RTS | SerialSignal_DTR;
-	else
-		info->serial_signals &= ~(SerialSignal_RTS | SerialSignal_DTR);
-	set_signals(info);
-	spin_unlock_irqrestore(&info->lock, flags);
-}
-
-
-static int mgslpc_open(struct tty_struct *tty, struct file * filp)
-{
-	MGSLPC_INFO	*info;
-	struct tty_port *port;
-	int		retval, line;
-	unsigned long	flags;
-
-	/* verify range of specified line number */
-	line = tty->index;
-	if (line >= mgslpc_device_count) {
-		printk("%s(%d):mgslpc_open with invalid line #%d.\n",
-			__FILE__, __LINE__, line);
-		return -ENODEV;
-	}
-
-	/* find the info structure for the specified line */
-	info = mgslpc_device_list;
-	while(info && info->line != line)
-		info = info->next_device;
-	if (mgslpc_paranoia_check(info, tty->name, "mgslpc_open"))
-		return -ENODEV;
-
-	port = &info->port;
-	tty->driver_data = info;
-	tty_port_tty_set(port, tty);
-
-	if (debug_level >= DEBUG_LEVEL_INFO)
-		printk("%s(%d):mgslpc_open(%s), old ref count = %d\n",
-			 __FILE__, __LINE__, tty->driver->name, port->count);
-
-	spin_lock_irqsave(&info->netlock, flags);
-	if (info->netcount) {
-		retval = -EBUSY;
-		spin_unlock_irqrestore(&info->netlock, flags);
-		goto cleanup;
-	}
-	spin_lock(&port->lock);
-	port->count++;
-	spin_unlock(&port->lock);
-	spin_unlock_irqrestore(&info->netlock, flags);
-
-	if (port->count == 1) {
-		/* 1st open on this device, init hardware */
-		retval = startup(info, tty);
-		if (retval < 0)
-			goto cleanup;
-	}
-
-	retval = tty_port_block_til_ready(&info->port, tty, filp);
-	if (retval) {
-		if (debug_level >= DEBUG_LEVEL_INFO)
-			printk("%s(%d):block_til_ready(%s) returned %d\n",
-				 __FILE__, __LINE__, info->device_name, retval);
-		goto cleanup;
-	}
-
-	if (debug_level >= DEBUG_LEVEL_INFO)
-		printk("%s(%d):mgslpc_open(%s) success\n",
-			 __FILE__, __LINE__, info->device_name);
-	retval = 0;
-
-cleanup:
-	return retval;
-}
-
-/*
- * /proc fs routines....
- */
-
-static inline void line_info(struct seq_file *m, MGSLPC_INFO *info)
-{
-	char	stat_buf[30];
-	unsigned long flags;
-
-	seq_printf(m, "%s:io:%04X irq:%d",
-		      info->device_name, info->io_base, info->irq_level);
-
-	/* output current serial signal states */
-	spin_lock_irqsave(&info->lock, flags);
-	get_signals(info);
-	spin_unlock_irqrestore(&info->lock, flags);
-
-	stat_buf[0] = 0;
-	stat_buf[1] = 0;
-	if (info->serial_signals & SerialSignal_RTS)
-		strcat(stat_buf, "|RTS");
-	if (info->serial_signals & SerialSignal_CTS)
-		strcat(stat_buf, "|CTS");
-	if (info->serial_signals & SerialSignal_DTR)
-		strcat(stat_buf, "|DTR");
-	if (info->serial_signals & SerialSignal_DSR)
-		strcat(stat_buf, "|DSR");
-	if (info->serial_signals & SerialSignal_DCD)
-		strcat(stat_buf, "|CD");
-	if (info->serial_signals & SerialSignal_RI)
-		strcat(stat_buf, "|RI");
-
-	if (info->params.mode == MGSL_MODE_HDLC) {
-		seq_printf(m, " HDLC txok:%d rxok:%d",
-			      info->icount.txok, info->icount.rxok);
-		if (info->icount.txunder)
-			seq_printf(m, " txunder:%d", info->icount.txunder);
-		if (info->icount.txabort)
-			seq_printf(m, " txabort:%d", info->icount.txabort);
-		if (info->icount.rxshort)
-			seq_printf(m, " rxshort:%d", info->icount.rxshort);
-		if (info->icount.rxlong)
-			seq_printf(m, " rxlong:%d", info->icount.rxlong);
-		if (info->icount.rxover)
-			seq_printf(m, " rxover:%d", info->icount.rxover);
-		if (info->icount.rxcrc)
-			seq_printf(m, " rxcrc:%d", info->icount.rxcrc);
-	} else {
-		seq_printf(m, " ASYNC tx:%d rx:%d",
-			      info->icount.tx, info->icount.rx);
-		if (info->icount.frame)
-			seq_printf(m, " fe:%d", info->icount.frame);
-		if (info->icount.parity)
-			seq_printf(m, " pe:%d", info->icount.parity);
-		if (info->icount.brk)
-			seq_printf(m, " brk:%d", info->icount.brk);
-		if (info->icount.overrun)
-			seq_printf(m, " oe:%d", info->icount.overrun);
-	}
-
-	/* Append serial signal status to end */
-	seq_printf(m, " %s\n", stat_buf+1);
-
-	seq_printf(m, "txactive=%d bh_req=%d bh_run=%d pending_bh=%x\n",
-		       info->tx_active,info->bh_requested,info->bh_running,
-		       info->pending_bh);
-}
-
-/* Called to print information about devices
- */
-static int mgslpc_proc_show(struct seq_file *m, void *v)
-{
-	MGSLPC_INFO *info;
-
-	seq_printf(m, "synclink driver:%s\n", driver_version);
-
-	info = mgslpc_device_list;
-	while (info) {
-		line_info(m, info);
-		info = info->next_device;
-	}
-	return 0;
-}
-
-static int rx_alloc_buffers(MGSLPC_INFO *info)
-{
-	/* each buffer has header and data */
-	info->rx_buf_size = sizeof(RXBUF) + info->max_frame_size;
-
-	/* calculate total allocation size for 8 buffers */
-	info->rx_buf_total_size = info->rx_buf_size * 8;
-
-	/* limit total allocated memory */
-	if (info->rx_buf_total_size > 0x10000)
-		info->rx_buf_total_size = 0x10000;
-
-	/* calculate number of buffers */
-	info->rx_buf_count = info->rx_buf_total_size / info->rx_buf_size;
-
-	info->rx_buf = kmalloc(info->rx_buf_total_size, GFP_KERNEL);
-	if (info->rx_buf == NULL)
-		return -ENOMEM;
-
-	/* unused flag buffer to satisfy receive_buf calling interface */
-	info->flag_buf = kzalloc(info->max_frame_size, GFP_KERNEL);
-	if (!info->flag_buf) {
-		kfree(info->rx_buf);
-		info->rx_buf = NULL;
-		return -ENOMEM;
-	}
-	
-	rx_reset_buffers(info);
-	return 0;
-}
-
-static void rx_free_buffers(MGSLPC_INFO *info)
-{
-	kfree(info->rx_buf);
-	info->rx_buf = NULL;
-	kfree(info->flag_buf);
-	info->flag_buf = NULL;
-}
-
-static int claim_resources(MGSLPC_INFO *info)
-{
-	if (rx_alloc_buffers(info) < 0) {
-		printk("Can't allocate rx buffer %s\n", info->device_name);
-		release_resources(info);
-		return -ENODEV;
-	}
-	return 0;
-}
-
-static void release_resources(MGSLPC_INFO *info)
-{
-	if (debug_level >= DEBUG_LEVEL_INFO)
-		printk("release_resources(%s)\n", info->device_name);
-	rx_free_buffers(info);
-}
-
-/* Add the specified device instance data structure to the
- * global linked list of devices and increment the device count.
- *
- * Arguments:		info	pointer to device instance data
- */
-static int mgslpc_add_device(MGSLPC_INFO *info)
-{
-	MGSLPC_INFO *current_dev = NULL;
-	struct device *tty_dev;
-	int ret;
-
-	info->next_device = NULL;
-	info->line = mgslpc_device_count;
-	sprintf(info->device_name,"ttySLP%d",info->line);
-
-	if (info->line < MAX_DEVICE_COUNT) {
-		if (maxframe[info->line])
-			info->max_frame_size = maxframe[info->line];
-	}
-
-	mgslpc_device_count++;
-
-	if (!mgslpc_device_list)
-		mgslpc_device_list = info;
-	else {
-		current_dev = mgslpc_device_list;
-		while (current_dev->next_device)
-			current_dev = current_dev->next_device;
-		current_dev->next_device = info;
-	}
-
-	if (info->max_frame_size < 4096)
-		info->max_frame_size = 4096;
-	else if (info->max_frame_size > 65535)
-		info->max_frame_size = 65535;
-
-	printk("SyncLink PC Card %s:IO=%04X IRQ=%d\n",
-		info->device_name, info->io_base, info->irq_level);
-
-#if SYNCLINK_GENERIC_HDLC
-	ret = hdlcdev_init(info);
-	if (ret != 0)
-		goto failed;
-#endif
-
-	tty_dev = tty_port_register_device(&info->port, serial_driver, info->line,
-			&info->p_dev->dev);
-	if (IS_ERR(tty_dev)) {
-		ret = PTR_ERR(tty_dev);
-#if SYNCLINK_GENERIC_HDLC
-		hdlcdev_exit(info);
-#endif
-		goto failed;
-	}
-
-	return 0;
-
-failed:
-	if (current_dev)
-		current_dev->next_device = NULL;
-	else
-		mgslpc_device_list = NULL;
-	mgslpc_device_count--;
-	return ret;
-}
-
-static void mgslpc_remove_device(MGSLPC_INFO *remove_info)
-{
-	MGSLPC_INFO *info = mgslpc_device_list;
-	MGSLPC_INFO *last = NULL;
-
-	while(info) {
-		if (info == remove_info) {
-			if (last)
-				last->next_device = info->next_device;
-			else
-				mgslpc_device_list = info->next_device;
-			tty_unregister_device(serial_driver, info->line);
-#if SYNCLINK_GENERIC_HDLC
-			hdlcdev_exit(info);
-#endif
-			release_resources(info);
-			tty_port_destroy(&info->port);
-			kfree(info);
-			mgslpc_device_count--;
-			return;
-		}
-		last = info;
-		info = info->next_device;
-	}
-}
-
-static const struct pcmcia_device_id mgslpc_ids[] = {
-	PCMCIA_DEVICE_MANF_CARD(0x02c5, 0x0050),
-	PCMCIA_DEVICE_NULL
-};
-MODULE_DEVICE_TABLE(pcmcia, mgslpc_ids);
-
-static struct pcmcia_driver mgslpc_driver = {
-	.owner		= THIS_MODULE,
-	.name		= "synclink_cs",
-	.probe		= mgslpc_probe,
-	.remove		= mgslpc_detach,
-	.id_table	= mgslpc_ids,
-	.suspend	= mgslpc_suspend,
-	.resume		= mgslpc_resume,
-};
-
-static const struct tty_operations mgslpc_ops = {
-	.open = mgslpc_open,
-	.close = mgslpc_close,
-	.write = mgslpc_write,
-	.put_char = mgslpc_put_char,
-	.flush_chars = mgslpc_flush_chars,
-	.write_room = mgslpc_write_room,
-	.chars_in_buffer = mgslpc_chars_in_buffer,
-	.flush_buffer = mgslpc_flush_buffer,
-	.ioctl = mgslpc_ioctl,
-	.throttle = mgslpc_throttle,
-	.unthrottle = mgslpc_unthrottle,
-	.send_xchar = mgslpc_send_xchar,
-	.break_ctl = mgslpc_break,
-	.wait_until_sent = mgslpc_wait_until_sent,
-	.set_termios = mgslpc_set_termios,
-	.stop = tx_pause,
-	.start = tx_release,
-	.hangup = mgslpc_hangup,
-	.tiocmget = tiocmget,
-	.tiocmset = tiocmset,
-	.get_icount = mgslpc_get_icount,
-	.proc_show = mgslpc_proc_show,
-};
-
-static int __init synclink_cs_init(void)
-{
-	int rc;
-
-	if (break_on_load) {
-		mgslpc_get_text_ptr();
-		BREAKPOINT();
-	}
-
-	serial_driver = tty_alloc_driver(MAX_DEVICE_COUNT,
-			TTY_DRIVER_REAL_RAW |
-			TTY_DRIVER_DYNAMIC_DEV);
-	if (IS_ERR(serial_driver)) {
-		rc = PTR_ERR(serial_driver);
-		goto err;
-	}
-
-	/* Initialize the tty_driver structure */
-	serial_driver->driver_name = "synclink_cs";
-	serial_driver->name = "ttySLP";
-	serial_driver->major = ttymajor;
-	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 =
-	B9600 | CS8 | CREAD | HUPCL | CLOCAL;
-	tty_set_operations(serial_driver, &mgslpc_ops);
-
-	rc = tty_register_driver(serial_driver);
-	if (rc < 0) {
-		printk(KERN_ERR "%s(%d):Couldn't register serial driver\n",
-				__FILE__, __LINE__);
-		goto err_put_tty;
-	}
-
-	rc = pcmcia_register_driver(&mgslpc_driver);
-	if (rc < 0)
-		goto err_unreg_tty;
-
-	printk(KERN_INFO "%s %s, tty major#%d\n", driver_name, driver_version,
-			serial_driver->major);
-
-	return 0;
-err_unreg_tty:
-	tty_unregister_driver(serial_driver);
-err_put_tty:
-	tty_driver_kref_put(serial_driver);
-err:
-	return rc;
-}
-
-static void __exit synclink_cs_exit(void)
-{
-	pcmcia_unregister_driver(&mgslpc_driver);
-	tty_unregister_driver(serial_driver);
-	tty_driver_kref_put(serial_driver);
-}
-
-module_init(synclink_cs_init);
-module_exit(synclink_cs_exit);
-
-static void mgslpc_set_rate(MGSLPC_INFO *info, unsigned char channel, unsigned int rate)
-{
-	unsigned int M, N;
-	unsigned char val;
-
-	/* note:standard BRG mode is broken in V3.2 chip
-	 * so enhanced mode is always used
-	 */
-
-	if (rate) {
-		N = 3686400 / rate;
-		if (!N)
-			N = 1;
-		N >>= 1;
-		for (M = 1; N > 64 && M < 16; M++)
-			N >>= 1;
-		N--;
-
-		/* BGR[5..0] = N
-		 * BGR[9..6] = M
-		 * BGR[7..0] contained in BGR register
-		 * BGR[9..8] contained in CCR2[7..6]
-		 * divisor = (N+1)*2^M
-		 *
-		 * Note: M *must* not be zero (causes asymetric duty cycle)
-		 */
-		write_reg(info, (unsigned char) (channel + BGR),
-				  (unsigned char) ((M << 6) + N));
-		val = read_reg(info, (unsigned char) (channel + CCR2)) & 0x3f;
-		val |= ((M << 4) & 0xc0);
-		write_reg(info, (unsigned char) (channel + CCR2), val);
-	}
-}
-
-/* Enabled the AUX clock output at the specified frequency.
- */
-static void enable_auxclk(MGSLPC_INFO *info)
-{
-	unsigned char val;
-
-	/* MODE
-	 *
-	 * 07..06  MDS[1..0] 10 = transparent HDLC mode
-	 * 05      ADM Address Mode, 0 = no addr recognition
-	 * 04      TMD Timer Mode, 0 = external
-	 * 03      RAC Receiver Active, 0 = inactive
-	 * 02      RTS 0=RTS active during xmit, 1=RTS always active
-	 * 01      TRS Timer Resolution, 1=512
-	 * 00      TLP Test Loop, 0 = no loop
-	 *
-	 * 1000 0010
-	 */
-	val = 0x82;
-
-	/* channel B RTS is used to enable AUXCLK driver on SP505 */
-	if (info->params.mode == MGSL_MODE_HDLC && info->params.clock_speed)
-		val |= BIT2;
-	write_reg(info, CHB + MODE, val);
-
-	/* CCR0
-	 *
-	 * 07      PU Power Up, 1=active, 0=power down
-	 * 06      MCE Master Clock Enable, 1=enabled
-	 * 05      Reserved, 0
-	 * 04..02  SC[2..0] Encoding
-	 * 01..00  SM[1..0] Serial Mode, 00=HDLC
-	 *
-	 * 11000000
-	 */
-	write_reg(info, CHB + CCR0, 0xc0);
-
-	/* CCR1
-	 *
-	 * 07      SFLG Shared Flag, 0 = disable shared flags
-	 * 06      GALP Go Active On Loop, 0 = not used
-	 * 05      GLP Go On Loop, 0 = not used
-	 * 04      ODS Output Driver Select, 1=TxD is push-pull output
-	 * 03      ITF Interframe Time Fill, 0=mark, 1=flag
-	 * 02..00  CM[2..0] Clock Mode
-	 *
-	 * 0001 0111
-	 */
-	write_reg(info, CHB + CCR1, 0x17);
-
-	/* CCR2 (Channel B)
-	 *
-	 * 07..06  BGR[9..8] Baud rate bits 9..8
-	 * 05      BDF Baud rate divisor factor, 0=1, 1=BGR value
-	 * 04      SSEL Clock source select, 1=submode b
-	 * 03      TOE 0=TxCLK is input, 1=TxCLK is output
-	 * 02      RWX Read/Write Exchange 0=disabled
-	 * 01      C32, CRC select, 0=CRC-16, 1=CRC-32
-	 * 00      DIV, data inversion 0=disabled, 1=enabled
-	 *
-	 * 0011 1000
-	 */
-	if (info->params.mode == MGSL_MODE_HDLC && info->params.clock_speed)
-		write_reg(info, CHB + CCR2, 0x38);
-	else
-		write_reg(info, CHB + CCR2, 0x30);
-
-	/* CCR4
-	 *
-	 * 07      MCK4 Master Clock Divide by 4, 1=enabled
-	 * 06      EBRG Enhanced Baud Rate Generator Mode, 1=enabled
-	 * 05      TST1 Test Pin, 0=normal operation
-	 * 04      ICD Ivert Carrier Detect, 1=enabled (active low)
-	 * 03..02  Reserved, must be 0
-	 * 01..00  RFT[1..0] RxFIFO Threshold 00=32 bytes
-	 *
-	 * 0101 0000
-	 */
-	write_reg(info, CHB + CCR4, 0x50);
-
-	/* if auxclk not enabled, set internal BRG so
-	 * CTS transitions can be detected (requires TxC)
-	 */
-	if (info->params.mode == MGSL_MODE_HDLC && info->params.clock_speed)
-		mgslpc_set_rate(info, CHB, info->params.clock_speed);
-	else
-		mgslpc_set_rate(info, CHB, 921600);
-}
-
-static void loopback_enable(MGSLPC_INFO *info)
-{
-	unsigned char val;
-
-	/* CCR1:02..00  CM[2..0] Clock Mode = 111 (clock mode 7) */
-	val = read_reg(info, CHA + CCR1) | (BIT2 | BIT1 | BIT0);
-	write_reg(info, CHA + CCR1, val);
-
-	/* CCR2:04 SSEL Clock source select, 1=submode b */
-	val = read_reg(info, CHA + CCR2) | (BIT4 | BIT5);
-	write_reg(info, CHA + CCR2, val);
-
-	/* set LinkSpeed if available, otherwise default to 2Mbps */
-	if (info->params.clock_speed)
-		mgslpc_set_rate(info, CHA, info->params.clock_speed);
-	else
-		mgslpc_set_rate(info, CHA, 1843200);
-
-	/* MODE:00 TLP Test Loop, 1=loopback enabled */
-	val = read_reg(info, CHA + MODE) | BIT0;
-	write_reg(info, CHA + MODE, val);
-}
-
-static void hdlc_mode(MGSLPC_INFO *info)
-{
-	unsigned char val;
-	unsigned char clkmode, clksubmode;
-
-	/* disable all interrupts */
-	irq_disable(info, CHA, 0xffff);
-	irq_disable(info, CHB, 0xffff);
-	port_irq_disable(info, 0xff);
-
-	/* assume clock mode 0a, rcv=RxC xmt=TxC */
-	clkmode = clksubmode = 0;
-	if (info->params.flags & HDLC_FLAG_RXC_DPLL
-	    && info->params.flags & HDLC_FLAG_TXC_DPLL) {
-		/* clock mode 7a, rcv = DPLL, xmt = DPLL */
-		clkmode = 7;
-	} else if (info->params.flags & HDLC_FLAG_RXC_BRG
-		 && info->params.flags & HDLC_FLAG_TXC_BRG) {
-		/* clock mode 7b, rcv = BRG, xmt = BRG */
-		clkmode = 7;
-		clksubmode = 1;
-	} else if (info->params.flags & HDLC_FLAG_RXC_DPLL) {
-		if (info->params.flags & HDLC_FLAG_TXC_BRG) {
-			/* clock mode 6b, rcv = DPLL, xmt = BRG/16 */
-			clkmode = 6;
-			clksubmode = 1;
-		} else {
-			/* clock mode 6a, rcv = DPLL, xmt = TxC */
-			clkmode = 6;
-		}
-	} else if (info->params.flags & HDLC_FLAG_TXC_BRG) {
-		/* clock mode 0b, rcv = RxC, xmt = BRG */
-		clksubmode = 1;
-	}
-
-	/* MODE
-	 *
-	 * 07..06  MDS[1..0] 10 = transparent HDLC mode
-	 * 05      ADM Address Mode, 0 = no addr recognition
-	 * 04      TMD Timer Mode, 0 = external
-	 * 03      RAC Receiver Active, 0 = inactive
-	 * 02      RTS 0=RTS active during xmit, 1=RTS always active
-	 * 01      TRS Timer Resolution, 1=512
-	 * 00      TLP Test Loop, 0 = no loop
-	 *
-	 * 1000 0010
-	 */
-	val = 0x82;
-	if (info->params.loopback)
-		val |= BIT0;
-
-	/* preserve RTS state */
-	if (info->serial_signals & SerialSignal_RTS)
-		val |= BIT2;
-	write_reg(info, CHA + MODE, val);
-
-	/* CCR0
-	 *
-	 * 07      PU Power Up, 1=active, 0=power down
-	 * 06      MCE Master Clock Enable, 1=enabled
-	 * 05      Reserved, 0
-	 * 04..02  SC[2..0] Encoding
-	 * 01..00  SM[1..0] Serial Mode, 00=HDLC
-	 *
-	 * 11000000
-	 */
-	val = 0xc0;
-	switch (info->params.encoding)
-	{
-	case HDLC_ENCODING_NRZI:
-		val |= BIT3;
-		break;
-	case HDLC_ENCODING_BIPHASE_SPACE:
-		val |= BIT4;
-		break;		// FM0
-	case HDLC_ENCODING_BIPHASE_MARK:
-		val |= BIT4 | BIT2;
-		break;		// FM1
-	case HDLC_ENCODING_BIPHASE_LEVEL:
-		val |= BIT4 | BIT3;
-		break;		// Manchester
-	}
-	write_reg(info, CHA + CCR0, val);
-
-	/* CCR1
-	 *
-	 * 07      SFLG Shared Flag, 0 = disable shared flags
-	 * 06      GALP Go Active On Loop, 0 = not used
-	 * 05      GLP Go On Loop, 0 = not used
-	 * 04      ODS Output Driver Select, 1=TxD is push-pull output
-	 * 03      ITF Interframe Time Fill, 0=mark, 1=flag
-	 * 02..00  CM[2..0] Clock Mode
-	 *
-	 * 0001 0000
-	 */
-	val = 0x10 + clkmode;
-	write_reg(info, CHA + CCR1, val);
-
-	/* CCR2
-	 *
-	 * 07..06  BGR[9..8] Baud rate bits 9..8
-	 * 05      BDF Baud rate divisor factor, 0=1, 1=BGR value
-	 * 04      SSEL Clock source select, 1=submode b
-	 * 03      TOE 0=TxCLK is input, 0=TxCLK is input
-	 * 02      RWX Read/Write Exchange 0=disabled
-	 * 01      C32, CRC select, 0=CRC-16, 1=CRC-32
-	 * 00      DIV, data inversion 0=disabled, 1=enabled
-	 *
-	 * 0000 0000
-	 */
-	val = 0x00;
-	if (clkmode == 2 || clkmode == 3 || clkmode == 6
-	    || clkmode == 7 || (clkmode == 0 && clksubmode == 1))
-		val |= BIT5;
-	if (clksubmode)
-		val |= BIT4;
-	if (info->params.crc_type == HDLC_CRC_32_CCITT)
-		val |= BIT1;
-	if (info->params.encoding == HDLC_ENCODING_NRZB)
-		val |= BIT0;
-	write_reg(info, CHA + CCR2, val);
-
-	/* CCR3
-	 *
-	 * 07..06  PRE[1..0] Preamble count 00=1, 01=2, 10=4, 11=8
-	 * 05      EPT Enable preamble transmission, 1=enabled
-	 * 04      RADD Receive address pushed to FIFO, 0=disabled
-	 * 03      CRL CRC Reset Level, 0=FFFF
-	 * 02      RCRC Rx CRC 0=On 1=Off
-	 * 01      TCRC Tx CRC 0=On 1=Off
-	 * 00      PSD DPLL Phase Shift Disable
-	 *
-	 * 0000 0000
-	 */
-	val = 0x00;
-	if (info->params.crc_type == HDLC_CRC_NONE)
-		val |= BIT2 | BIT1;
-	if (info->params.preamble != HDLC_PREAMBLE_PATTERN_NONE)
-		val |= BIT5;
-	switch (info->params.preamble_length)
-	{
-	case HDLC_PREAMBLE_LENGTH_16BITS:
-		val |= BIT6;
-		break;
-	case HDLC_PREAMBLE_LENGTH_32BITS:
-		val |= BIT6;
-		break;
-	case HDLC_PREAMBLE_LENGTH_64BITS:
-		val |= BIT7 | BIT6;
-		break;
-	}
-	write_reg(info, CHA + CCR3, val);
-
-	/* PRE - Preamble pattern */
-	val = 0;
-	switch (info->params.preamble)
-	{
-	case HDLC_PREAMBLE_PATTERN_FLAGS: val = 0x7e; break;
-	case HDLC_PREAMBLE_PATTERN_10:    val = 0xaa; break;
-	case HDLC_PREAMBLE_PATTERN_01:    val = 0x55; break;
-	case HDLC_PREAMBLE_PATTERN_ONES:  val = 0xff; break;
-	}
-	write_reg(info, CHA + PRE, val);
-
-	/* CCR4
-	 *
-	 * 07      MCK4 Master Clock Divide by 4, 1=enabled
-	 * 06      EBRG Enhanced Baud Rate Generator Mode, 1=enabled
-	 * 05      TST1 Test Pin, 0=normal operation
-	 * 04      ICD Ivert Carrier Detect, 1=enabled (active low)
-	 * 03..02  Reserved, must be 0
-	 * 01..00  RFT[1..0] RxFIFO Threshold 00=32 bytes
-	 *
-	 * 0101 0000
-	 */
-	val = 0x50;
-	write_reg(info, CHA + CCR4, val);
-	if (info->params.flags & HDLC_FLAG_RXC_DPLL)
-		mgslpc_set_rate(info, CHA, info->params.clock_speed * 16);
-	else
-		mgslpc_set_rate(info, CHA, info->params.clock_speed);
-
-	/* RLCR Receive length check register
-	 *
-	 * 7     1=enable receive length check
-	 * 6..0  Max frame length = (RL + 1) * 32
-	 */
-	write_reg(info, CHA + RLCR, 0);
-
-	/* XBCH Transmit Byte Count High
-	 *
-	 * 07      DMA mode, 0 = interrupt driven
-	 * 06      NRM, 0=ABM (ignored)
-	 * 05      CAS Carrier Auto Start
-	 * 04      XC Transmit Continuously (ignored)
-	 * 03..00  XBC[10..8] Transmit byte count bits 10..8
-	 *
-	 * 0000 0000
-	 */
-	val = 0x00;
-	if (info->params.flags & HDLC_FLAG_AUTO_DCD)
-		val |= BIT5;
-	write_reg(info, CHA + XBCH, val);
-	enable_auxclk(info);
-	if (info->params.loopback || info->testing_irq)
-		loopback_enable(info);
-	if (info->params.flags & HDLC_FLAG_AUTO_CTS)
-	{
-		irq_enable(info, CHB, IRQ_CTS);
-		/* PVR[3] 1=AUTO CTS active */
-		set_reg_bits(info, CHA + PVR, BIT3);
-	} else
-		clear_reg_bits(info, CHA + PVR, BIT3);
-
-	irq_enable(info, CHA,
-			 IRQ_RXEOM | IRQ_RXFIFO | IRQ_ALLSENT |
-			 IRQ_UNDERRUN | IRQ_TXFIFO);
-	issue_command(info, CHA, CMD_TXRESET + CMD_RXRESET);
-	wait_command_complete(info, CHA);
-	read_reg16(info, CHA + ISR);	/* clear pending IRQs */
-
-	/* Master clock mode enabled above to allow reset commands
-	 * to complete even if no data clocks are present.
-	 *
-	 * Disable master clock mode for normal communications because
-	 * V3.2 of the ESCC2 has a bug that prevents the transmit all sent
-	 * IRQ when in master clock mode.
-	 *
-	 * Leave master clock mode enabled for IRQ test because the
-	 * timer IRQ used by the test can only happen in master clock mode.
-	 */
-	if (!info->testing_irq)
-		clear_reg_bits(info, CHA + CCR0, BIT6);
-
-	tx_set_idle(info);
-
-	tx_stop(info);
-	rx_stop(info);
-}
-
-static void rx_stop(MGSLPC_INFO *info)
-{
-	if (debug_level >= DEBUG_LEVEL_ISR)
-		printk("%s(%d):rx_stop(%s)\n",
-			 __FILE__, __LINE__, info->device_name);
-
-	/* MODE:03 RAC Receiver Active, 0=inactive */
-	clear_reg_bits(info, CHA + MODE, BIT3);
-
-	info->rx_enabled = false;
-	info->rx_overflow = false;
-}
-
-static void rx_start(MGSLPC_INFO *info)
-{
-	if (debug_level >= DEBUG_LEVEL_ISR)
-		printk("%s(%d):rx_start(%s)\n",
-			 __FILE__, __LINE__, info->device_name);
-
-	rx_reset_buffers(info);
-	info->rx_enabled = false;
-	info->rx_overflow = false;
-
-	/* MODE:03 RAC Receiver Active, 1=active */
-	set_reg_bits(info, CHA + MODE, BIT3);
-
-	info->rx_enabled = true;
-}
-
-static void tx_start(MGSLPC_INFO *info, struct tty_struct *tty)
-{
-	if (debug_level >= DEBUG_LEVEL_ISR)
-		printk("%s(%d):tx_start(%s)\n",
-			 __FILE__, __LINE__, info->device_name);
-
-	if (info->tx_count) {
-		/* If auto RTS enabled and RTS is inactive, then assert */
-		/* RTS and set a flag indicating that the driver should */
-		/* negate RTS when the transmission completes. */
-		info->drop_rts_on_tx_done = false;
-
-		if (info->params.flags & HDLC_FLAG_AUTO_RTS) {
-			get_signals(info);
-			if (!(info->serial_signals & SerialSignal_RTS)) {
-				info->serial_signals |= SerialSignal_RTS;
-				set_signals(info);
-				info->drop_rts_on_tx_done = true;
-			}
-		}
-
-		if (info->params.mode == MGSL_MODE_ASYNC) {
-			if (!info->tx_active) {
-				info->tx_active = true;
-				tx_ready(info, tty);
-			}
-		} else {
-			info->tx_active = true;
-			tx_ready(info, tty);
-			mod_timer(&info->tx_timer, jiffies +
-					msecs_to_jiffies(5000));
-		}
-	}
-
-	if (!info->tx_enabled)
-		info->tx_enabled = true;
-}
-
-static void tx_stop(MGSLPC_INFO *info)
-{
-	if (debug_level >= DEBUG_LEVEL_ISR)
-		printk("%s(%d):tx_stop(%s)\n",
-			 __FILE__, __LINE__, info->device_name);
-
-	del_timer(&info->tx_timer);
-
-	info->tx_enabled = false;
-	info->tx_active = false;
-}
-
-/* Reset the adapter to a known state and prepare it for further use.
- */
-static void reset_device(MGSLPC_INFO *info)
-{
-	/* power up both channels (set BIT7) */
-	write_reg(info, CHA + CCR0, 0x80);
-	write_reg(info, CHB + CCR0, 0x80);
-	write_reg(info, CHA + MODE, 0);
-	write_reg(info, CHB + MODE, 0);
-
-	/* disable all interrupts */
-	irq_disable(info, CHA, 0xffff);
-	irq_disable(info, CHB, 0xffff);
-	port_irq_disable(info, 0xff);
-
-	/* PCR Port Configuration Register
-	 *
-	 * 07..04  DEC[3..0] Serial I/F select outputs
-	 * 03      output, 1=AUTO CTS control enabled
-	 * 02      RI Ring Indicator input 0=active
-	 * 01      DSR input 0=active
-	 * 00      DTR output 0=active
-	 *
-	 * 0000 0110
-	 */
-	write_reg(info, PCR, 0x06);
-
-	/* PVR Port Value Register
-	 *
-	 * 07..04  DEC[3..0] Serial I/F select (0000=disabled)
-	 * 03      AUTO CTS output 1=enabled
-	 * 02      RI Ring Indicator input
-	 * 01      DSR input
-	 * 00      DTR output (1=inactive)
-	 *
-	 * 0000 0001
-	 */
-//	write_reg(info, PVR, PVR_DTR);
-
-	/* IPC Interrupt Port Configuration
-	 *
-	 * 07      VIS 1=Masked interrupts visible
-	 * 06..05  Reserved, 0
-	 * 04..03  SLA Slave address, 00 ignored
-	 * 02      CASM Cascading Mode, 1=daisy chain
-	 * 01..00  IC[1..0] Interrupt Config, 01=push-pull output, active low
-	 *
-	 * 0000 0101
-	 */
-	write_reg(info, IPC, 0x05);
-}
-
-static void async_mode(MGSLPC_INFO *info)
-{
-	unsigned char val;
-
-	/* disable all interrupts */
-	irq_disable(info, CHA, 0xffff);
-	irq_disable(info, CHB, 0xffff);
-	port_irq_disable(info, 0xff);
-
-	/* MODE
-	 *
-	 * 07      Reserved, 0
-	 * 06      FRTS RTS State, 0=active
-	 * 05      FCTS Flow Control on CTS
-	 * 04      FLON Flow Control Enable
-	 * 03      RAC Receiver Active, 0 = inactive
-	 * 02      RTS 0=Auto RTS, 1=manual RTS
-	 * 01      TRS Timer Resolution, 1=512
-	 * 00      TLP Test Loop, 0 = no loop
-	 *
-	 * 0000 0110
-	 */
-	val = 0x06;
-	if (info->params.loopback)
-		val |= BIT0;
-
-	/* preserve RTS state */
-	if (!(info->serial_signals & SerialSignal_RTS))
-		val |= BIT6;
-	write_reg(info, CHA + MODE, val);
-
-	/* CCR0
-	 *
-	 * 07      PU Power Up, 1=active, 0=power down
-	 * 06      MCE Master Clock Enable, 1=enabled
-	 * 05      Reserved, 0
-	 * 04..02  SC[2..0] Encoding, 000=NRZ
-	 * 01..00  SM[1..0] Serial Mode, 11=Async
-	 *
-	 * 1000 0011
-	 */
-	write_reg(info, CHA + CCR0, 0x83);
-
-	/* CCR1
-	 *
-	 * 07..05  Reserved, 0
-	 * 04      ODS Output Driver Select, 1=TxD is push-pull output
-	 * 03      BCR Bit Clock Rate, 1=16x
-	 * 02..00  CM[2..0] Clock Mode, 111=BRG
-	 *
-	 * 0001 1111
-	 */
-	write_reg(info, CHA + CCR1, 0x1f);
-
-	/* CCR2 (channel A)
-	 *
-	 * 07..06  BGR[9..8] Baud rate bits 9..8
-	 * 05      BDF Baud rate divisor factor, 0=1, 1=BGR value
-	 * 04      SSEL Clock source select, 1=submode b
-	 * 03      TOE 0=TxCLK is input, 0=TxCLK is input
-	 * 02      RWX Read/Write Exchange 0=disabled
-	 * 01      Reserved, 0
-	 * 00      DIV, data inversion 0=disabled, 1=enabled
-	 *
-	 * 0001 0000
-	 */
-	write_reg(info, CHA + CCR2, 0x10);
-
-	/* CCR3
-	 *
-	 * 07..01  Reserved, 0
-	 * 00      PSD DPLL Phase Shift Disable
-	 *
-	 * 0000 0000
-	 */
-	write_reg(info, CHA + CCR3, 0);
-
-	/* CCR4
-	 *
-	 * 07      MCK4 Master Clock Divide by 4, 1=enabled
-	 * 06      EBRG Enhanced Baud Rate Generator Mode, 1=enabled
-	 * 05      TST1 Test Pin, 0=normal operation
-	 * 04      ICD Ivert Carrier Detect, 1=enabled (active low)
-	 * 03..00  Reserved, must be 0
-	 *
-	 * 0101 0000
-	 */
-	write_reg(info, CHA + CCR4, 0x50);
-	mgslpc_set_rate(info, CHA, info->params.data_rate * 16);
-
-	/* DAFO Data Format
-	 *
-	 * 07      Reserved, 0
-	 * 06      XBRK transmit break, 0=normal operation
-	 * 05      Stop bits (0=1, 1=2)
-	 * 04..03  PAR[1..0] Parity (01=odd, 10=even)
-	 * 02      PAREN Parity Enable
-	 * 01..00  CHL[1..0] Character Length (00=8, 01=7)
-	 *
-	 */
-	val = 0x00;
-	if (info->params.data_bits != 8)
-		val |= BIT0;	/* 7 bits */
-	if (info->params.stop_bits != 1)
-		val |= BIT5;
-	if (info->params.parity != ASYNC_PARITY_NONE)
-	{
-		val |= BIT2;	/* Parity enable */
-		if (info->params.parity == ASYNC_PARITY_ODD)
-			val |= BIT3;
-		else
-			val |= BIT4;
-	}
-	write_reg(info, CHA + DAFO, val);
-
-	/* RFC Rx FIFO Control
-	 *
-	 * 07      Reserved, 0
-	 * 06      DPS, 1=parity bit not stored in data byte
-	 * 05      DXS, 0=all data stored in FIFO (including XON/XOFF)
-	 * 04      RFDF Rx FIFO Data Format, 1=status byte stored in FIFO
-	 * 03..02  RFTH[1..0], rx threshold, 11=16 status + 16 data byte
-	 * 01      Reserved, 0
-	 * 00      TCDE Terminate Char Detect Enable, 0=disabled
-	 *
-	 * 0101 1100
-	 */
-	write_reg(info, CHA + RFC, 0x5c);
-
-	/* RLCR Receive length check register
-	 *
-	 * Max frame length = (RL + 1) * 32
-	 */
-	write_reg(info, CHA + RLCR, 0);
-
-	/* XBCH Transmit Byte Count High
-	 *
-	 * 07      DMA mode, 0 = interrupt driven
-	 * 06      NRM, 0=ABM (ignored)
-	 * 05      CAS Carrier Auto Start
-	 * 04      XC Transmit Continuously (ignored)
-	 * 03..00  XBC[10..8] Transmit byte count bits 10..8
-	 *
-	 * 0000 0000
-	 */
-	val = 0x00;
-	if (info->params.flags & HDLC_FLAG_AUTO_DCD)
-		val |= BIT5;
-	write_reg(info, CHA + XBCH, val);
-	if (info->params.flags & HDLC_FLAG_AUTO_CTS)
-		irq_enable(info, CHA, IRQ_CTS);
-
-	/* MODE:03 RAC Receiver Active, 1=active */
-	set_reg_bits(info, CHA + MODE, BIT3);
-	enable_auxclk(info);
-	if (info->params.flags & HDLC_FLAG_AUTO_CTS) {
-		irq_enable(info, CHB, IRQ_CTS);
-		/* PVR[3] 1=AUTO CTS active */
-		set_reg_bits(info, CHA + PVR, BIT3);
-	} else
-		clear_reg_bits(info, CHA + PVR, BIT3);
-	irq_enable(info, CHA,
-			  IRQ_RXEOM | IRQ_RXFIFO | IRQ_BREAK_ON | IRQ_RXTIME |
-			  IRQ_ALLSENT | IRQ_TXFIFO);
-	issue_command(info, CHA, CMD_TXRESET + CMD_RXRESET);
-	wait_command_complete(info, CHA);
-	read_reg16(info, CHA + ISR);	/* clear pending IRQs */
-}
-
-/* Set the HDLC idle mode for the transmitter.
- */
-static void tx_set_idle(MGSLPC_INFO *info)
-{
-	/* Note: ESCC2 only supports flags and one idle modes */
-	if (info->idle_mode == HDLC_TXIDLE_FLAGS)
-		set_reg_bits(info, CHA + CCR1, BIT3);
-	else
-		clear_reg_bits(info, CHA + CCR1, BIT3);
-}
-
-/* get state of the V24 status (input) signals.
- */
-static void get_signals(MGSLPC_INFO *info)
-{
-	unsigned char status = 0;
-
-	/* preserve RTS and DTR */
-	info->serial_signals &= SerialSignal_RTS | SerialSignal_DTR;
-
-	if (read_reg(info, CHB + VSTR) & BIT7)
-		info->serial_signals |= SerialSignal_DCD;
-	if (read_reg(info, CHB + STAR) & BIT1)
-		info->serial_signals |= SerialSignal_CTS;
-
-	status = read_reg(info, CHA + PVR);
-	if (!(status & PVR_RI))
-		info->serial_signals |= SerialSignal_RI;
-	if (!(status & PVR_DSR))
-		info->serial_signals |= SerialSignal_DSR;
-}
-
-/* Set the state of RTS and DTR based on contents of
- * serial_signals member of device extension.
- */
-static void set_signals(MGSLPC_INFO *info)
-{
-	unsigned char val;
-
-	val = read_reg(info, CHA + MODE);
-	if (info->params.mode == MGSL_MODE_ASYNC) {
-		if (info->serial_signals & SerialSignal_RTS)
-			val &= ~BIT6;
-		else
-			val |= BIT6;
-	} else {
-		if (info->serial_signals & SerialSignal_RTS)
-			val |= BIT2;
-		else
-			val &= ~BIT2;
-	}
-	write_reg(info, CHA + MODE, val);
-
-	if (info->serial_signals & SerialSignal_DTR)
-		clear_reg_bits(info, CHA + PVR, PVR_DTR);
-	else
-		set_reg_bits(info, CHA + PVR, PVR_DTR);
-}
-
-static void rx_reset_buffers(MGSLPC_INFO *info)
-{
-	RXBUF *buf;
-	int i;
-
-	info->rx_put = 0;
-	info->rx_get = 0;
-	info->rx_frame_count = 0;
-	for (i=0 ; i < info->rx_buf_count ; i++) {
-		buf = (RXBUF*)(info->rx_buf + (i * info->rx_buf_size));
-		buf->status = buf->count = 0;
-	}
-}
-
-/* Attempt to return a received HDLC frame
- * Only frames received without errors are returned.
- *
- * Returns true if frame returned, otherwise false
- */
-static bool rx_get_frame(MGSLPC_INFO *info, struct tty_struct *tty)
-{
-	unsigned short status;
-	RXBUF *buf;
-	unsigned int framesize = 0;
-	unsigned long flags;
-	bool return_frame = false;
-
-	if (info->rx_frame_count == 0)
-		return false;
-
-	buf = (RXBUF*)(info->rx_buf + (info->rx_get * info->rx_buf_size));
-
-	status = buf->status;
-
-	/* 07  VFR  1=valid frame
-	 * 06  RDO  1=data overrun
-	 * 05  CRC  1=OK, 0=error
-	 * 04  RAB  1=frame aborted
-	 */
-	if ((status & 0xf0) != 0xA0) {
-		if (!(status & BIT7) || (status & BIT4))
-			info->icount.rxabort++;
-		else if (status & BIT6)
-			info->icount.rxover++;
-		else if (!(status & BIT5)) {
-			info->icount.rxcrc++;
-			if (info->params.crc_type & HDLC_CRC_RETURN_EX)
-				return_frame = true;
-		}
-		framesize = 0;
-#if SYNCLINK_GENERIC_HDLC
-		{
-			info->netdev->stats.rx_errors++;
-			info->netdev->stats.rx_frame_errors++;
-		}
-#endif
-	} else
-		return_frame = true;
-
-	if (return_frame)
-		framesize = buf->count;
-
-	if (debug_level >= DEBUG_LEVEL_BH)
-		printk("%s(%d):rx_get_frame(%s) status=%04X size=%d\n",
-			__FILE__, __LINE__, info->device_name, status, framesize);
-
-	if (debug_level >= DEBUG_LEVEL_DATA)
-		trace_block(info, buf->data, framesize, 0);
-
-	if (framesize) {
-		if ((info->params.crc_type & HDLC_CRC_RETURN_EX &&
-		      framesize+1 > info->max_frame_size) ||
-		    framesize > info->max_frame_size)
-			info->icount.rxlong++;
-		else {
-			if (status & BIT5)
-				info->icount.rxok++;
-
-			if (info->params.crc_type & HDLC_CRC_RETURN_EX) {
-				*(buf->data + framesize) = status & BIT5 ? RX_OK:RX_CRC_ERROR;
-				++framesize;
-			}
-
-#if SYNCLINK_GENERIC_HDLC
-			if (info->netcount)
-				hdlcdev_rx(info, buf->data, framesize);
-			else
-#endif
-				ldisc_receive_buf(tty, buf->data, info->flag_buf, framesize);
-		}
-	}
-
-	spin_lock_irqsave(&info->lock, flags);
-	buf->status = buf->count = 0;
-	info->rx_frame_count--;
-	info->rx_get++;
-	if (info->rx_get >= info->rx_buf_count)
-		info->rx_get = 0;
-	spin_unlock_irqrestore(&info->lock, flags);
-
-	return true;
-}
-
-static bool register_test(MGSLPC_INFO *info)
-{
-	static unsigned char patterns[] =
-	    { 0x00, 0xff, 0xaa, 0x55, 0x69, 0x96, 0x0f };
-	static unsigned int count = ARRAY_SIZE(patterns);
-	unsigned int i;
-	bool rc = true;
-	unsigned long flags;
-
-	spin_lock_irqsave(&info->lock, flags);
-	reset_device(info);
-
-	for (i = 0; i < count; i++) {
-		write_reg(info, XAD1, patterns[i]);
-		write_reg(info, XAD2, patterns[(i + 1) % count]);
-		if ((read_reg(info, XAD1) != patterns[i]) ||
-		    (read_reg(info, XAD2) != patterns[(i + 1) % count])) {
-			rc = false;
-			break;
-		}
-	}
-
-	spin_unlock_irqrestore(&info->lock, flags);
-	return rc;
-}
-
-static bool irq_test(MGSLPC_INFO *info)
-{
-	unsigned long end_time;
-	unsigned long flags;
-
-	spin_lock_irqsave(&info->lock, flags);
-	reset_device(info);
-
-	info->testing_irq = true;
-	hdlc_mode(info);
-
-	info->irq_occurred = false;
-
-	/* init hdlc mode */
-
-	irq_enable(info, CHA, IRQ_TIMER);
-	write_reg(info, CHA + TIMR, 0);	/* 512 cycles */
-	issue_command(info, CHA, CMD_START_TIMER);
-
-	spin_unlock_irqrestore(&info->lock, flags);
-
-	end_time=100;
-	while(end_time-- && !info->irq_occurred) {
-		msleep_interruptible(10);
-	}
-
-	info->testing_irq = false;
-
-	spin_lock_irqsave(&info->lock, flags);
-	reset_device(info);
-	spin_unlock_irqrestore(&info->lock, flags);
-
-	return info->irq_occurred;
-}
-
-static int adapter_test(MGSLPC_INFO *info)
-{
-	if (!register_test(info)) {
-		info->init_error = DiagStatus_AddressFailure;
-		printk("%s(%d):Register test failure for device %s Addr=%04X\n",
-			__FILE__, __LINE__, info->device_name, (unsigned short)(info->io_base));
-		return -ENODEV;
-	}
-
-	if (!irq_test(info)) {
-		info->init_error = DiagStatus_IrqFailure;
-		printk("%s(%d):Interrupt test failure for device %s IRQ=%d\n",
-			__FILE__, __LINE__, info->device_name, (unsigned short)(info->irq_level));
-		return -ENODEV;
-	}
-
-	if (debug_level >= DEBUG_LEVEL_INFO)
-		printk("%s(%d):device %s passed diagnostics\n",
-			__FILE__, __LINE__, info->device_name);
-	return 0;
-}
-
-static void trace_block(MGSLPC_INFO *info,const char* data, int count, int xmit)
-{
-	int i;
-	int linecount;
-	if (xmit)
-		printk("%s tx data:\n", info->device_name);
-	else
-		printk("%s rx data:\n", info->device_name);
-
-	while(count) {
-		if (count > 16)
-			linecount = 16;
-		else
-			linecount = count;
-
-		for(i=0;i<linecount;i++)
-			printk("%02X ", (unsigned char)data[i]);
-		for(;i<17;i++)
-			printk("   ");
-		for(i=0;i<linecount;i++) {
-			if (data[i]>=040 && data[i]<=0176)
-				printk("%c", data[i]);
-			else
-				printk(".");
-		}
-		printk("\n");
-
-		data  += linecount;
-		count -= linecount;
-	}
-}
-
-/* HDLC frame time out
- * update stats and do tx completion processing
- */
-static void tx_timeout(struct timer_list *t)
-{
-	MGSLPC_INFO *info = from_timer(info, t, tx_timer);
-	unsigned long flags;
-
-	if (debug_level >= DEBUG_LEVEL_INFO)
-		printk("%s(%d):tx_timeout(%s)\n",
-			__FILE__, __LINE__, info->device_name);
-	if (info->tx_active &&
-	    info->params.mode == MGSL_MODE_HDLC) {
-		info->icount.txtimeout++;
-	}
-	spin_lock_irqsave(&info->lock, flags);
-	info->tx_active = false;
-	info->tx_count = info->tx_put = info->tx_get = 0;
-
-	spin_unlock_irqrestore(&info->lock, flags);
-
-#if SYNCLINK_GENERIC_HDLC
-	if (info->netcount)
-		hdlcdev_tx_done(info);
-	else
-#endif
-	{
-		struct tty_struct *tty = tty_port_tty_get(&info->port);
-		bh_transmit(info, tty);
-		tty_kref_put(tty);
-	}
-}
-
-#if SYNCLINK_GENERIC_HDLC
-
-/*
- * called by generic HDLC layer when protocol selected (PPP, frame relay, etc.)
- * set encoding and frame check sequence (FCS) options
- *
- * dev       pointer to network device structure
- * encoding  serial encoding setting
- * parity    FCS setting
- *
- * returns 0 if success, otherwise error code
- */
-static int hdlcdev_attach(struct net_device *dev, unsigned short encoding,
-			  unsigned short parity)
-{
-	MGSLPC_INFO *info = dev_to_port(dev);
-	struct tty_struct *tty;
-	unsigned char  new_encoding;
-	unsigned short new_crctype;
-
-	/* return error if TTY interface open */
-	if (info->port.count)
-		return -EBUSY;
-
-	switch (encoding)
-	{
-	case ENCODING_NRZ:        new_encoding = HDLC_ENCODING_NRZ; break;
-	case ENCODING_NRZI:       new_encoding = HDLC_ENCODING_NRZI_SPACE; break;
-	case ENCODING_FM_MARK:    new_encoding = HDLC_ENCODING_BIPHASE_MARK; break;
-	case ENCODING_FM_SPACE:   new_encoding = HDLC_ENCODING_BIPHASE_SPACE; break;
-	case ENCODING_MANCHESTER: new_encoding = HDLC_ENCODING_BIPHASE_LEVEL; break;
-	default: return -EINVAL;
-	}
-
-	switch (parity)
-	{
-	case PARITY_NONE:            new_crctype = HDLC_CRC_NONE; break;
-	case PARITY_CRC16_PR1_CCITT: new_crctype = HDLC_CRC_16_CCITT; break;
-	case PARITY_CRC32_PR1_CCITT: new_crctype = HDLC_CRC_32_CCITT; break;
-	default: return -EINVAL;
-	}
-
-	info->params.encoding = new_encoding;
-	info->params.crc_type = new_crctype;
-
-	/* if network interface up, reprogram hardware */
-	if (info->netcount) {
-		tty = tty_port_tty_get(&info->port);
-		mgslpc_program_hw(info, tty);
-		tty_kref_put(tty);
-	}
-
-	return 0;
-}
-
-/*
- * called by generic HDLC layer to send frame
- *
- * skb  socket buffer containing HDLC frame
- * dev  pointer to network device structure
- */
-static netdev_tx_t hdlcdev_xmit(struct sk_buff *skb,
-				      struct net_device *dev)
-{
-	MGSLPC_INFO *info = dev_to_port(dev);
-	unsigned long flags;
-
-	if (debug_level >= DEBUG_LEVEL_INFO)
-		printk(KERN_INFO "%s:hdlc_xmit(%s)\n", __FILE__, dev->name);
-
-	/* stop sending until this frame completes */
-	netif_stop_queue(dev);
-
-	/* copy data to device buffers */
-	skb_copy_from_linear_data(skb, info->tx_buf, skb->len);
-	info->tx_get = 0;
-	info->tx_put = info->tx_count = skb->len;
-
-	/* update network statistics */
-	dev->stats.tx_packets++;
-	dev->stats.tx_bytes += skb->len;
-
-	/* done with socket buffer, so free it */
-	dev_kfree_skb(skb);
-
-	/* save start time for transmit timeout detection */
-	netif_trans_update(dev);
-
-	/* start hardware transmitter if necessary */
-	spin_lock_irqsave(&info->lock, flags);
-	if (!info->tx_active) {
-		struct tty_struct *tty = tty_port_tty_get(&info->port);
-		tx_start(info, tty);
-		tty_kref_put(tty);
-	}
-	spin_unlock_irqrestore(&info->lock, flags);
-
-	return NETDEV_TX_OK;
-}
-
-/*
- * called by network layer when interface enabled
- * claim resources and initialize hardware
- *
- * dev  pointer to network device structure
- *
- * returns 0 if success, otherwise error code
- */
-static int hdlcdev_open(struct net_device *dev)
-{
-	MGSLPC_INFO *info = dev_to_port(dev);
-	struct tty_struct *tty;
-	int rc;
-	unsigned long flags;
-
-	if (debug_level >= DEBUG_LEVEL_INFO)
-		printk("%s:hdlcdev_open(%s)\n", __FILE__, dev->name);
-
-	/* generic HDLC layer open processing */
-	rc = hdlc_open(dev);
-	if (rc != 0)
-		return rc;
-
-	/* arbitrate between network and tty opens */
-	spin_lock_irqsave(&info->netlock, flags);
-	if (info->port.count != 0 || info->netcount != 0) {
-		printk(KERN_WARNING "%s: hdlc_open returning busy\n", dev->name);
-		spin_unlock_irqrestore(&info->netlock, flags);
-		return -EBUSY;
-	}
-	info->netcount=1;
-	spin_unlock_irqrestore(&info->netlock, flags);
-
-	tty = tty_port_tty_get(&info->port);
-	/* claim resources and init adapter */
-	rc = startup(info, tty);
-	if (rc != 0) {
-		tty_kref_put(tty);
-		spin_lock_irqsave(&info->netlock, flags);
-		info->netcount=0;
-		spin_unlock_irqrestore(&info->netlock, flags);
-		return rc;
-	}
-	/* assert RTS and DTR, apply hardware settings */
-	info->serial_signals |= SerialSignal_RTS | SerialSignal_DTR;
-	mgslpc_program_hw(info, tty);
-	tty_kref_put(tty);
-
-	/* enable network layer transmit */
-	netif_trans_update(dev);
-	netif_start_queue(dev);
-
-	/* inform generic HDLC layer of current DCD status */
-	spin_lock_irqsave(&info->lock, flags);
-	get_signals(info);
-	spin_unlock_irqrestore(&info->lock, flags);
-	if (info->serial_signals & SerialSignal_DCD)
-		netif_carrier_on(dev);
-	else
-		netif_carrier_off(dev);
-	return 0;
-}
-
-/*
- * called by network layer when interface is disabled
- * shutdown hardware and release resources
- *
- * dev  pointer to network device structure
- *
- * returns 0 if success, otherwise error code
- */
-static int hdlcdev_close(struct net_device *dev)
-{
-	MGSLPC_INFO *info = dev_to_port(dev);
-	struct tty_struct *tty = tty_port_tty_get(&info->port);
-	unsigned long flags;
-
-	if (debug_level >= DEBUG_LEVEL_INFO)
-		printk("%s:hdlcdev_close(%s)\n", __FILE__, dev->name);
-
-	netif_stop_queue(dev);
-
-	/* shutdown adapter and release resources */
-	shutdown(info, tty);
-	tty_kref_put(tty);
-	hdlc_close(dev);
-
-	spin_lock_irqsave(&info->netlock, flags);
-	info->netcount=0;
-	spin_unlock_irqrestore(&info->netlock, flags);
-
-	return 0;
-}
-
-/*
- * called by network layer to process IOCTL call to network device
- *
- * dev  pointer to network device structure
- * ifs  pointer to network interface settings structure
- *
- * returns 0 if success, otherwise error code
- */
-static int hdlcdev_wan_ioctl(struct net_device *dev, struct if_settings *ifs)
-{
-	const size_t size = sizeof(sync_serial_settings);
-	sync_serial_settings new_line;
-	sync_serial_settings __user *line = ifs->ifs_ifsu.sync;
-	MGSLPC_INFO *info = dev_to_port(dev);
-	unsigned int flags;
-
-	if (debug_level >= DEBUG_LEVEL_INFO)
-		printk("%s:hdlcdev_ioctl(%s)\n", __FILE__, dev->name);
-
-	/* return error if TTY interface open */
-	if (info->port.count)
-		return -EBUSY;
-
-	memset(&new_line, 0, size);
-
-	switch (ifs->type) {
-	case IF_GET_IFACE: /* return current sync_serial_settings */
-
-		ifs->type = IF_IFACE_SYNC_SERIAL;
-		if (ifs->size < size) {
-			ifs->size = size; /* data size wanted */
-			return -ENOBUFS;
-		}
-
-		flags = info->params.flags & (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL |
-					      HDLC_FLAG_RXC_BRG    | HDLC_FLAG_RXC_TXCPIN |
-					      HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL |
-					      HDLC_FLAG_TXC_BRG    | HDLC_FLAG_TXC_RXCPIN);
-
-		switch (flags){
-		case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_TXCPIN): new_line.clock_type = CLOCK_EXT; break;
-		case (HDLC_FLAG_RXC_BRG    | HDLC_FLAG_TXC_BRG):    new_line.clock_type = CLOCK_INT; break;
-		case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_BRG):    new_line.clock_type = CLOCK_TXINT; break;
-		case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_RXCPIN): new_line.clock_type = CLOCK_TXFROMRX; break;
-		default: new_line.clock_type = CLOCK_DEFAULT;
-		}
-
-		new_line.clock_rate = info->params.clock_speed;
-		new_line.loopback   = info->params.loopback ? 1:0;
-
-		if (copy_to_user(line, &new_line, size))
-			return -EFAULT;
-		return 0;
-
-	case IF_IFACE_SYNC_SERIAL: /* set sync_serial_settings */
-
-		if(!capable(CAP_NET_ADMIN))
-			return -EPERM;
-		if (copy_from_user(&new_line, line, size))
-			return -EFAULT;
-
-		switch (new_line.clock_type)
-		{
-		case CLOCK_EXT:      flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_TXCPIN; break;
-		case CLOCK_TXFROMRX: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_RXCPIN; break;
-		case CLOCK_INT:      flags = HDLC_FLAG_RXC_BRG    | HDLC_FLAG_TXC_BRG;    break;
-		case CLOCK_TXINT:    flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_BRG;    break;
-		case CLOCK_DEFAULT:  flags = info->params.flags &
-					     (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL |
-					      HDLC_FLAG_RXC_BRG    | HDLC_FLAG_RXC_TXCPIN |
-					      HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL |
-					      HDLC_FLAG_TXC_BRG    | HDLC_FLAG_TXC_RXCPIN); break;
-		default: return -EINVAL;
-		}
-
-		if (new_line.loopback != 0 && new_line.loopback != 1)
-			return -EINVAL;
-
-		info->params.flags &= ~(HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL |
-					HDLC_FLAG_RXC_BRG    | HDLC_FLAG_RXC_TXCPIN |
-					HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL |
-					HDLC_FLAG_TXC_BRG    | HDLC_FLAG_TXC_RXCPIN);
-		info->params.flags |= flags;
-
-		info->params.loopback = new_line.loopback;
-
-		if (flags & (HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG))
-			info->params.clock_speed = new_line.clock_rate;
-		else
-			info->params.clock_speed = 0;
-
-		/* if network interface up, reprogram hardware */
-		if (info->netcount) {
-			struct tty_struct *tty = tty_port_tty_get(&info->port);
-			mgslpc_program_hw(info, tty);
-			tty_kref_put(tty);
-		}
-		return 0;
-	default:
-		return hdlc_ioctl(dev, ifs);
-	}
-}
-
-/*
- * called by network layer when transmit timeout is detected
- *
- * dev  pointer to network device structure
- */
-static void hdlcdev_tx_timeout(struct net_device *dev, unsigned int txqueue)
-{
-	MGSLPC_INFO *info = dev_to_port(dev);
-	unsigned long flags;
-
-	if (debug_level >= DEBUG_LEVEL_INFO)
-		printk("hdlcdev_tx_timeout(%s)\n", dev->name);
-
-	dev->stats.tx_errors++;
-	dev->stats.tx_aborted_errors++;
-
-	spin_lock_irqsave(&info->lock, flags);
-	tx_stop(info);
-	spin_unlock_irqrestore(&info->lock, flags);
-
-	netif_wake_queue(dev);
-}
-
-/*
- * called by device driver when transmit completes
- * reenable network layer transmit if stopped
- *
- * info  pointer to device instance information
- */
-static void hdlcdev_tx_done(MGSLPC_INFO *info)
-{
-	if (netif_queue_stopped(info->netdev))
-		netif_wake_queue(info->netdev);
-}
-
-/*
- * called by device driver when frame received
- * pass frame to network layer
- *
- * info  pointer to device instance information
- * buf   pointer to buffer contianing frame data
- * size  count of data bytes in buf
- */
-static void hdlcdev_rx(MGSLPC_INFO *info, char *buf, int size)
-{
-	struct sk_buff *skb = dev_alloc_skb(size);
-	struct net_device *dev = info->netdev;
-
-	if (debug_level >= DEBUG_LEVEL_INFO)
-		printk("hdlcdev_rx(%s)\n", dev->name);
-
-	if (skb == NULL) {
-		printk(KERN_NOTICE "%s: can't alloc skb, dropping packet\n", dev->name);
-		dev->stats.rx_dropped++;
-		return;
-	}
-
-	skb_put_data(skb, buf, size);
-
-	skb->protocol = hdlc_type_trans(skb, dev);
-
-	dev->stats.rx_packets++;
-	dev->stats.rx_bytes += size;
-
-	netif_rx(skb);
-}
-
-static const struct net_device_ops hdlcdev_ops = {
-	.ndo_open       = hdlcdev_open,
-	.ndo_stop       = hdlcdev_close,
-	.ndo_start_xmit = hdlc_start_xmit,
-	.ndo_siocwandev = hdlcdev_wan_ioctl,
-	.ndo_tx_timeout = hdlcdev_tx_timeout,
-};
-
-/*
- * called by device driver when adding device instance
- * do generic HDLC initialization
- *
- * info  pointer to device instance information
- *
- * returns 0 if success, otherwise error code
- */
-static int hdlcdev_init(MGSLPC_INFO *info)
-{
-	int rc;
-	struct net_device *dev;
-	hdlc_device *hdlc;
-
-	/* allocate and initialize network and HDLC layer objects */
-
-	dev = alloc_hdlcdev(info);
-	if (dev == NULL) {
-		printk(KERN_ERR "%s:hdlc device allocation failure\n", __FILE__);
-		return -ENOMEM;
-	}
-
-	/* for network layer reporting purposes only */
-	dev->base_addr = info->io_base;
-	dev->irq       = info->irq_level;
-
-	/* network layer callbacks and settings */
-	dev->netdev_ops	    = &hdlcdev_ops;
-	dev->watchdog_timeo = 10 * HZ;
-	dev->tx_queue_len   = 50;
-
-	/* generic HDLC layer callbacks and settings */
-	hdlc         = dev_to_hdlc(dev);
-	hdlc->attach = hdlcdev_attach;
-	hdlc->xmit   = hdlcdev_xmit;
-
-	/* register objects with HDLC layer */
-	rc = register_hdlc_device(dev);
-	if (rc) {
-		printk(KERN_WARNING "%s:unable to register hdlc device\n", __FILE__);
-		free_netdev(dev);
-		return rc;
-	}
-
-	info->netdev = dev;
-	return 0;
-}
-
-/*
- * called by device driver when removing device instance
- * do generic HDLC cleanup
- *
- * info  pointer to device instance information
- */
-static void hdlcdev_exit(MGSLPC_INFO *info)
-{
-	unregister_hdlc_device(info->netdev);
-	free_netdev(info->netdev);
-	info->netdev = NULL;
-}
-
-#endif /* CONFIG_HDLC */
-

include/linux/cm4000_cs.h

···
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef	_CM4000_H_
-#define	_CM4000_H_
-
-#include <uapi/linux/cm4000_cs.h>
-
-
-#define	DEVICE_NAME		"cmm"
-#define	MODULE_NAME		"cm4000_cs"
-
-#endif	/* _CM4000_H_ */

include/uapi/linux/cm4000_cs.h

···
-/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
-#ifndef _UAPI_CM4000_H_
-#define _UAPI_CM4000_H_
-
-#include <linux/types.h>
-#include <linux/ioctl.h>
-
-#define	MAX_ATR			33
-
-#define	CM4000_MAX_DEV		4
-
-/* those two structures are passed via ioctl() from/to userspace.  They are
- * used by existing userspace programs, so I kepth the awkward "bIFSD" naming
- * not to break compilation of userspace apps. -HW */
-
-typedef struct atreq {
-	__s32 atr_len;
-	unsigned char atr[64];
-	__s32 power_act;
-	unsigned char bIFSD;
-	unsigned char bIFSC;
-} atreq_t;
-
-
-/* what is particularly stupid in the original driver is the arch-dependent
- * member sizes. This leads to CONFIG_COMPAT breakage, since 32bit userspace
- * will lay out the structure members differently than the 64bit kernel.
- *
- * I've changed "ptsreq.protocol" from "unsigned long" to "__u32".
- * On 32bit this will make no difference.  With 64bit kernels, it will make
- * 32bit apps work, too.
- */
-
-typedef struct ptsreq {
-	__u32 protocol; /*T=0: 2^0, T=1:  2^1*/
- 	unsigned char flags;
- 	unsigned char pts1;
- 	unsigned char pts2;
-	unsigned char pts3;
-} ptsreq_t;
-
-#define	CM_IOC_MAGIC		'c'
-#define	CM_IOC_MAXNR	        255
-
-#define	CM_IOCGSTATUS		_IOR (CM_IOC_MAGIC, 0, unsigned char *)
-#define	CM_IOCGATR		_IOWR(CM_IOC_MAGIC, 1, atreq_t *)
-#define	CM_IOCSPTS		_IOW (CM_IOC_MAGIC, 2, ptsreq_t *)
-#define	CM_IOCSRDR		_IO  (CM_IOC_MAGIC, 3)
-#define CM_IOCARDOFF            _IO  (CM_IOC_MAGIC, 4)
-
-#define CM_IOSDBGLVL            _IOW(CM_IOC_MAGIC, 250, int*)
-
-/* card and device states */
-#define	CM_CARD_INSERTED		0x01
-#define	CM_CARD_POWERED			0x02
-#define	CM_ATR_PRESENT			0x04
-#define	CM_ATR_VALID	 		0x08
-#define	CM_STATE_VALID			0x0f
-/* extra info only from CM4000 */
-#define	CM_NO_READER			0x10
-#define	CM_BAD_CARD			0x20
-
-
-#endif /* _UAPI_CM4000_H_ */