Linux-2.6.12-rc2

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

Let it rip!

3 files changed, 4640 insertions, 0 deletions

diff --git a/drivers/char/pcmcia/Kconfig b/drivers/char/pcmcia/Kconfig
new file mode 100644
index 000000000000..d22bfdc13563
--- /dev/null
+++ b/drivers/char/pcmcia/Kconfig
@@ -0,0 +1,22 @@
+#
+# PCMCIA character device configuration
+#
+
+menu "PCMCIA character devices"
+	depends on HOTPLUG && PCMCIA!=n
+
+config SYNCLINK_CS
+	tristate "SyncLink PC Card support"
+	depends on PCMCIA
+	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 synclinkmp.  If you want to do that, say M
+	  here.
+
+endmenu
+
diff --git a/drivers/char/pcmcia/Makefile b/drivers/char/pcmcia/Makefile
new file mode 100644
index 000000000000..1fcd4c591958
--- /dev/null
+++ b/drivers/char/pcmcia/Makefile
@@ -0,0 +1,7 @@
+#
+# drivers/char/pcmcia/Makefile
+#
+# Makefile for the Linux PCMCIA char device drivers.
+#
+
+obj-$(CONFIG_SYNCLINK_CS) += synclink_cs.o
diff --git a/drivers/char/pcmcia/synclink_cs.c b/drivers/char/pcmcia/synclink_cs.c
new file mode 100644
index 000000000000..1c8d866a49dc
--- /dev/null
+++ b/drivers/char/pcmcia/synclink_cs.c
@@ -0,0 +1,4611 @@
+/*
+ * linux/drivers/char/pcmcia/synclink_cs.c
+ *
+ * $Id: synclink_cs.c,v 4.26 2004/08/11 19:30:02 paulkf Exp $
+ *
+ * Device driver for Microgate SyncLink PC Card
+ * multiprotocol serial adapter.
+ *
+ * written by Paul Fulghum for Microgate Corporation
+ * paulkf@microgate.com
+ *
+ * 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/config.h>	
+#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/pci.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/slab.h>
+#include <linux/netdevice.h>
+#include <linux/vmalloc.h>
+#include <linux/init.h>
+#include <asm/serial.h>
+#include <linux/delay.h>
+#include <linux/ioctl.h>
+
+#include <asm/system.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/version.h>
+#include <pcmcia/cs_types.h>
+#include <pcmcia/cs.h>
+#include <pcmcia/cistpl.h>
+#include <pcmcia/cisreg.h>
+#include <pcmcia/ds.h>
+
+#ifdef CONFIG_HDLC_MODULE
+#define CONFIG_HDLC 1
+#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 <asm/uaccess.h>
+
+#include "linux/synclink.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 {
+	void *if_ptr;	/* General purpose pointer (used by SPPP) */
+	int			magic;
+	int			flags;
+	int			count;		/* count of opens */
+	int			line;
+	unsigned short		close_delay;
+	unsigned short		closing_wait;	/* time to wait before closing */
+	
+	struct mgsl_icount	icount;
+	
+	struct tty_struct 	*tty;
+	int			timeout;
+	int			x_char;		/* xon/xoff character */
+	int			blocked_open;	/* # of blocked opens */
+	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	open_wait;
+	wait_queue_head_t	close_wait;
+	
+	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;
+
+	int bh_running;
+	int 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;
+
+	int rx_enabled;
+	int rx_overflow;
+
+	int tx_enabled;
+	int tx_active;
+	int 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 */
+
+	char irq_occurred;		/* for diagnostics use */
+	char testing_irq;
+	unsigned int init_error;	/* startup error (DIAGS)	*/
+
+	char flag_buf[MAX_ASYNC_BUFFER_SIZE];
+	BOOLEAN drop_rts_on_tx_done;
+
+	struct	_input_signal_events	input_signal_events;
+
+	/* PCMCIA support */
+	dev_link_t	      link;
+	dev_node_t	      node;
+	int		      stop;
+
+	/* SPPP/Cisco HDLC device parts */
+	int netcount;
+	int dosyncppp;
+	spinlock_t netlock;
+
+#ifdef CONFIG_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);
+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(unsigned long context);
+
+static int ioctl_common(MGSLPC_INFO *info, unsigned int cmd, unsigned long arg);
+
+#ifdef CONFIG_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 BOOLEAN register_test(MGSLPC_INFO *info);
+static BOOLEAN 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 void mgslpc_add_device(MGSLPC_INFO *info);
+static void mgslpc_remove_device(MGSLPC_INFO *info);
+
+static int  rx_get_frame(MGSLPC_INFO *info);
+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, struct pt_regs * regs);
+
+/*
+ * Bottom half interrupt handlers
+ */
+static void bh_handler(void* Context);
+static void bh_transmit(MGSLPC_INFO *info);
+static void bh_status(MGSLPC_INFO *info);
+
+/*
+ * ioctl handlers
+ */
+static int tiocmget(struct tty_struct *tty, struct file *file);
+static int tiocmset(struct tty_struct *tty, struct file *file,
+		    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);
+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);
+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 int break_on_load=0;
+
+/*
+ * 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,};
+static int dosyncppp[MAX_DEVICE_COUNT] = {1,1,1,1};
+
+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_param_array(dosyncppp, int, NULL, 0);
+
+MODULE_LICENSE("GPL");
+
+static char *driver_name = "SyncLink PC Card driver";
+static char *driver_version = "$Revision: 4.26 $";
+
+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);
+static void mgslpc_wait_until_sent(struct tty_struct *tty, int timeout);
+
+/* PCMCIA prototypes */
+
+static void mgslpc_config(dev_link_t *link);
+static void mgslpc_release(u_long arg);
+static int  mgslpc_event(event_t event, int priority,
+			 event_callback_args_t *args);
+static dev_link_t *mgslpc_attach(void);
+static void mgslpc_detach(dev_link_t *);
+
+static dev_info_t dev_info = "synclink_cs";
+static dev_link_t *dev_list = NULL;
+
+/*
+ * 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_flush_buffer - flush line discipline receive buffers
+ * ldisc_receive_buf  - pass receive data to line discipline
+ */
+
+static void ldisc_flush_buffer(struct tty_struct *tty)
+{
+	struct tty_ldisc *ld = tty_ldisc_ref(tty);
+	if (ld) {
+		if (ld->flush_buffer)
+			ld->flush_buffer(tty);
+		tty_ldisc_deref(ld);
+	}
+}
+
+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->receive_buf)
+			ld->receive_buf(tty, data, flags, count);
+		tty_ldisc_deref(ld);
+	}
+}
+
+static dev_link_t *mgslpc_attach(void)
+{
+    MGSLPC_INFO *info;
+    dev_link_t *link;
+    client_reg_t client_reg;
+    int ret;
+    
+    if (debug_level >= DEBUG_LEVEL_INFO)
+	    printk("mgslpc_attach\n");
+	
+    info = (MGSLPC_INFO *)kmalloc(sizeof(MGSLPC_INFO), GFP_KERNEL);
+    if (!info) {
+	    printk("Error can't allocate device instance data\n");
+	    return NULL;
+    }
+
+    memset(info, 0, sizeof(MGSLPC_INFO));
+    info->magic = MGSLPC_MAGIC;
+    INIT_WORK(&info->task, bh_handler, info);
+    info->max_frame_size = 4096;
+    info->close_delay = 5*HZ/10;
+    info->closing_wait = 30*HZ;
+    init_waitqueue_head(&info->open_wait);
+    init_waitqueue_head(&info->close_wait);
+    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;
+
+    link = &info->link;
+    link->priv = info;
+    
+    /* Initialize the dev_link_t structure */
+
+    /* Interrupt setup */
+    link->irq.Attributes = IRQ_TYPE_EXCLUSIVE;
+    link->irq.IRQInfo1   = IRQ_INFO2_VALID | IRQ_LEVEL_ID;
+    link->irq.Handler = NULL;
+    
+    link->conf.Attributes = 0;
+    link->conf.Vcc = 50;
+    link->conf.IntType = INT_MEMORY_AND_IO;
+
+    /* Register with Card Services */
+    link->next = dev_list;
+    dev_list = link;
+
+    client_reg.dev_info = &dev_info;
+    client_reg.EventMask =
+	    CS_EVENT_CARD_INSERTION | CS_EVENT_CARD_REMOVAL |
+	    CS_EVENT_RESET_PHYSICAL | CS_EVENT_CARD_RESET |
+	    CS_EVENT_PM_SUSPEND | CS_EVENT_PM_RESUME;
+    client_reg.event_handler = &mgslpc_event;
+    client_reg.Version = 0x0210;
+    client_reg.event_callback_args.client_data = link;
+
+    ret = pcmcia_register_client(&link->handle, &client_reg);
+    if (ret != CS_SUCCESS) {
+	    cs_error(link->handle, RegisterClient, ret);
+	    mgslpc_detach(link);
+	    return NULL;
+    }
+
+    mgslpc_add_device(info);
+
+    return link;
+}
+
+/* Card has been inserted.
+ */
+
+#define CS_CHECK(fn, ret) \
+do { last_fn = (fn); if ((last_ret = (ret)) != 0) goto cs_failed; } while (0)
+
+static void mgslpc_config(dev_link_t *link)
+{
+    client_handle_t handle = link->handle;
+    MGSLPC_INFO *info = link->priv;
+    tuple_t tuple;
+    cisparse_t parse;
+    int last_fn, last_ret;
+    u_char buf[64];
+    config_info_t conf;
+    cistpl_cftable_entry_t dflt = { 0 };
+    cistpl_cftable_entry_t *cfg;
+    
+    if (debug_level >= DEBUG_LEVEL_INFO)
+	    printk("mgslpc_config(0x%p)\n", link);
+
+    /* read CONFIG tuple to find its configuration registers */
+    tuple.DesiredTuple = CISTPL_CONFIG;
+    tuple.Attributes = 0;
+    tuple.TupleData = buf;
+    tuple.TupleDataMax = sizeof(buf);
+    tuple.TupleOffset = 0;
+    CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(handle, &tuple));
+    CS_CHECK(GetTupleData, pcmcia_get_tuple_data(handle, &tuple));
+    CS_CHECK(ParseTuple, pcmcia_parse_tuple(handle, &tuple, &parse));
+    link->conf.ConfigBase = parse.config.base;
+    link->conf.Present = parse.config.rmask[0];
+    
+    /* Configure card */
+    link->state |= DEV_CONFIG;
+
+    /* Look up the current Vcc */
+    CS_CHECK(GetConfigurationInfo, pcmcia_get_configuration_info(handle, &conf));
+    link->conf.Vcc = conf.Vcc;
+
+    /* get CIS configuration entry */
+
+    tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
+    CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(handle, &tuple));
+
+    cfg = &(parse.cftable_entry);
+    CS_CHECK(GetTupleData, pcmcia_get_tuple_data(handle, &tuple));
+    CS_CHECK(ParseTuple, pcmcia_parse_tuple(handle, &tuple, &parse));
+
+    if (cfg->flags & CISTPL_CFTABLE_DEFAULT) dflt = *cfg;
+    if (cfg->index == 0)
+	    goto cs_failed;
+
+    link->conf.ConfigIndex = cfg->index;
+    link->conf.Attributes |= CONF_ENABLE_IRQ;
+	
+    /* IO window settings */
+    link->io.NumPorts1 = 0;
+    if ((cfg->io.nwin > 0) || (dflt.io.nwin > 0)) {
+	    cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt.io;
+	    link->io.Attributes1 = IO_DATA_PATH_WIDTH_AUTO;
+	    if (!(io->flags & CISTPL_IO_8BIT))
+		    link->io.Attributes1 = IO_DATA_PATH_WIDTH_16;
+	    if (!(io->flags & CISTPL_IO_16BIT))
+		    link->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
+	    link->io.IOAddrLines = io->flags & CISTPL_IO_LINES_MASK;
+	    link->io.BasePort1 = io->win[0].base;
+	    link->io.NumPorts1 = io->win[0].len;
+	    CS_CHECK(RequestIO, pcmcia_request_io(link->handle, &link->io));
+    }
+
+    link->conf.Attributes = CONF_ENABLE_IRQ;
+    link->conf.Vcc = 50;
+    link->conf.IntType = INT_MEMORY_AND_IO;
+    link->conf.ConfigIndex = 8;
+    link->conf.Present = PRESENT_OPTION;
+    
+    link->irq.Attributes |= IRQ_HANDLE_PRESENT;
+    link->irq.Handler     = mgslpc_isr;
+    link->irq.Instance    = info;
+    CS_CHECK(RequestIRQ, pcmcia_request_irq(link->handle, &link->irq));
+
+    CS_CHECK(RequestConfiguration, pcmcia_request_configuration(link->handle, &link->conf));
+
+    info->io_base = link->io.BasePort1;
+    info->irq_level = link->irq.AssignedIRQ;
+
+    /* add to linked list of devices */
+    sprintf(info->node.dev_name, "mgslpc0");
+    info->node.major = info->node.minor = 0;
+    link->dev = &info->node;
+
+    printk(KERN_INFO "%s: index 0x%02x:",
+	   info->node.dev_name, link->conf.ConfigIndex);
+    if (link->conf.Attributes & CONF_ENABLE_IRQ)
+	    printk(", irq %d", link->irq.AssignedIRQ);
+    if (link->io.NumPorts1)
+	    printk(", io 0x%04x-0x%04x", link->io.BasePort1,
+		   link->io.BasePort1+link->io.NumPorts1-1);
+    printk("\n");
+    
+    link->state &= ~DEV_CONFIG_PENDING;
+    return;
+
+cs_failed:
+    cs_error(link->handle, last_fn, last_ret);
+    mgslpc_release((u_long)link);
+}
+
+/* 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)
+{
+    dev_link_t *link = (dev_link_t *)arg;
+
+    if (debug_level >= DEBUG_LEVEL_INFO)
+	    printk("mgslpc_release(0x%p)\n", link);
+
+    /* Unlink the device chain */
+    link->dev = NULL;
+    link->state &= ~DEV_CONFIG;
+
+    pcmcia_release_configuration(link->handle);
+    if (link->io.NumPorts1)
+	    pcmcia_release_io(link->handle, &link->io);
+    if (link->irq.AssignedIRQ)
+	    pcmcia_release_irq(link->handle, &link->irq);
+    if (link->state & DEV_STALE_LINK)
+	    mgslpc_detach(link);
+}
+
+static void mgslpc_detach(dev_link_t *link)
+{
+    dev_link_t **linkp;
+
+    if (debug_level >= DEBUG_LEVEL_INFO)
+	    printk("mgslpc_detach(0x%p)\n", link);
+    
+    /* find device */
+    for (linkp = &dev_list; *linkp; linkp = &(*linkp)->next)
+	    if (*linkp == link) break;
+    if (*linkp == NULL)
+	    return;
+
+    if (link->state & DEV_CONFIG) {
+	    /* device is configured/active, mark it so when
+	     * release() is called a proper detach() occurs.
+	     */
+	    if (debug_level >= DEBUG_LEVEL_INFO)
+		    printk(KERN_DEBUG "synclinkpc: detach postponed, '%s' "
+			   "still locked\n", link->dev->dev_name);
+	    link->state |= DEV_STALE_LINK;
+	    return;
+    }
+
+    /* Break the link with Card Services */
+    if (link->handle)
+	    pcmcia_deregister_client(link->handle);
+    
+    /* Unlink device structure, and free it */
+    *linkp = link->next;
+    mgslpc_remove_device((MGSLPC_INFO *)link->priv);
+}
+
+static int mgslpc_event(event_t event, int priority,
+			event_callback_args_t *args)
+{
+    dev_link_t *link = args->client_data;
+    MGSLPC_INFO *info = link->priv;
+    
+    if (debug_level >= DEBUG_LEVEL_INFO)
+	    printk("mgslpc_event(0x%06x)\n", event);
+    
+    switch (event) {
+    case CS_EVENT_CARD_REMOVAL:
+	    link->state &= ~DEV_PRESENT;
+	    if (link->state & DEV_CONFIG) {
+		    ((MGSLPC_INFO *)link->priv)->stop = 1;
+		    mgslpc_release((u_long)link);
+	    }
+	    break;
+    case CS_EVENT_CARD_INSERTION:
+	    link->state |= DEV_PRESENT | DEV_CONFIG_PENDING;
+	    mgslpc_config(link);
+	    break;
+    case CS_EVENT_PM_SUSPEND:
+	    link->state |= DEV_SUSPEND;
+	    /* Fall through... */
+    case CS_EVENT_RESET_PHYSICAL:
+	    /* Mark the device as stopped, to block IO until later */
+	    info->stop = 1;
+	    if (link->state & DEV_CONFIG)
+		    pcmcia_release_configuration(link->handle);
+	    break;
+    case CS_EVENT_PM_RESUME:
+	    link->state &= ~DEV_SUSPEND;
+	    /* Fall through... */
+    case CS_EVENT_CARD_RESET:
+	    if (link->state & DEV_CONFIG)
+		    pcmcia_request_configuration(link->handle, &link->conf);
+	    info->stop = 0;
+	    break;
+    }
+    return 0;
+}
+
+static inline int 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 1;
+	}
+	if (info->magic != MGSLPC_MAGIC) {
+		printk(badmagic, name, routine);
+		return 1;
+	}
+#else
+	if (!info)
+		return 1;
+#endif
+	return 0;
+}
+
+
+#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 BOOLEAN 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);
+	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   = 0;
+		info->bh_requested = 0;
+	}
+	
+	spin_unlock_irqrestore(&info->lock,flags);
+	
+	return rc;
+}
+
+void bh_handler(void* Context)
+{
+	MGSLPC_INFO *info = (MGSLPC_INFO*)Context;
+	int action;
+
+	if (!info)
+		return;
+		
+	if (debug_level >= DEBUG_LEVEL_BH)
+		printk( "%s(%d):bh_handler(%s) entry\n",
+			__FILE__,__LINE__,info->device_name);
+	
+	info->bh_running = 1;
+
+	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));
+			break;
+		case BH_TRANSMIT:
+			bh_transmit(info);
+			break;
+		case BH_STATUS:
+			bh_status(info);
+			break;
+		default:
+			/* unknown work item ID */
+			printk("Unknown work item ID=%08X!\n", action);
+			break;
+		}
+	}
+
+	if (debug_level >= DEBUG_LEVEL_BH)
+		printk( "%s(%d):bh_handler(%s) exit\n",
+			__FILE__,__LINE__,info->device_name);
+}
+
+void bh_transmit(MGSLPC_INFO *info)
+{
+	struct tty_struct *tty = info->tty;
+	if (debug_level >= DEBUG_LEVEL_BH)
+		printk("bh_transmit() entry on %s\n", info->device_name);
+
+	if (tty) {
+		tty_wakeup(tty);
+		wake_up_interruptible(&tty->write_wait);
+	}
+}
+
+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 = 1;
+		info->icount.buf_overrun++;
+		return;
+	}
+
+	if (eom) {
+		/* end of frame, get FIFO count from RBCL register */ 
+		if (!(fifo_count = (unsigned char)(read_reg(info, CHA+RBCL) & 0x1f)))
+			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)
+{
+	unsigned char data, status;
+	int fifo_count;
+ 	struct tty_struct *tty = info->tty;
+ 	struct mgsl_icount *icount = &info->icount;
+
+	if (tcd) {
+		/* early termination, get FIFO count from RBCL register */