Initial import

1 files changed, 3008 insertions, 0 deletions

diff --git a/drivers/usb/serial/io_edgeport.c b/drivers/usb/serial/io_edgeport.c
new file mode 100644
index 000000000..5415d4b4e
--- /dev/null
+++ b/drivers/usb/serial/io_edgeport.c
@@ -0,0 +1,3008 @@
+/*
+ * Edgeport USB Serial Converter driver
+ *
+ * Copyright (C) 2000 Inside Out Networks, All rights reserved.
+ * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com>
+ *
+ *	This program is free software; you can redistribute it and/or modify
+ *	it under the terms of the GNU General Public License as published by
+ *	the Free Software Foundation; either version 2 of the License, or
+ *	(at your option) any later version.
+ *
+ * Supports the following devices:
+ *	Edgeport/4
+ *	Edgeport/4t
+ *	Edgeport/2
+ *	Edgeport/4i
+ *	Edgeport/2i
+ *	Edgeport/421
+ *	Edgeport/21
+ *	Rapidport/4
+ *	Edgeport/8
+ *	Edgeport/2D8
+ *	Edgeport/4D8
+ *	Edgeport/8i
+ *
+ * For questions or problems with this driver, contact Inside Out
+ * Networks technical support, or Peter Berger <pberger@brimson.com>,
+ * or Al Borchers <alborchers@steinerpoint.com>.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/jiffies.h>
+#include <linux/errno.h>
+#include <linux/slab.h>
+#include <linux/tty.h>
+#include <linux/tty_driver.h>
+#include <linux/tty_flip.h>
+#include <linux/module.h>
+#include <linux/spinlock.h>
+#include <linux/serial.h>
+#include <linux/ioctl.h>
+#include <linux/wait.h>
+#include <linux/firmware.h>
+#include <linux/ihex.h>
+#include <linux/uaccess.h>
+#include <linux/usb.h>
+#include <linux/usb/serial.h>
+#include "io_edgeport.h"
+#include "io_ionsp.h"		/* info for the iosp messages */
+#include "io_16654.h"		/* 16654 UART defines */
+
+#define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com> and David Iacovelli"
+#define DRIVER_DESC "Edgeport USB Serial Driver"
+
+#define MAX_NAME_LEN		64
+
+#define OPEN_TIMEOUT		(5*HZ)		/* 5 seconds */
+
+/* receive port state */
+enum RXSTATE {
+	EXPECT_HDR1 = 0,    /* Expect header byte 1 */
+	EXPECT_HDR2 = 1,    /* Expect header byte 2 */
+	EXPECT_DATA = 2,    /* Expect 'RxBytesRemaining' data */
+	EXPECT_HDR3 = 3,    /* Expect header byte 3 (for status hdrs only) */
+};
+
+
+/* Transmit Fifo
+ * This Transmit queue is an extension of the edgeport Rx buffer.
+ * The maximum amount of data buffered in both the edgeport
+ * Rx buffer (maxTxCredits) and this buffer will never exceed maxTxCredits.
+ */
+struct TxFifo {
+	unsigned int	head;	/* index to head pointer (write) */
+	unsigned int	tail;	/* index to tail pointer (read)  */
+	unsigned int	count;	/* Bytes in queue */
+	unsigned int	size;	/* Max size of queue (equal to Max number of TxCredits) */
+	unsigned char	*fifo;	/* allocated Buffer */
+};
+
+/* This structure holds all of the local port information */
+struct edgeport_port {
+	__u16			txCredits;		/* our current credits for this port */
+	__u16			maxTxCredits;		/* the max size of the port */
+
+	struct TxFifo		txfifo;			/* transmit fifo -- size will be maxTxCredits */
+	struct urb		*write_urb;		/* write URB for this port */
+	bool			write_in_progress;	/* 'true' while a write URB is outstanding */
+	spinlock_t		ep_lock;
+
+	__u8			shadowLCR;		/* last LCR value received */
+	__u8			shadowMCR;		/* last MCR value received */
+	__u8			shadowMSR;		/* last MSR value received */
+	__u8			shadowLSR;		/* last LSR value received */
+	__u8			shadowXonChar;		/* last value set as XON char in Edgeport */
+	__u8			shadowXoffChar;		/* last value set as XOFF char in Edgeport */
+	__u8			validDataMask;
+	__u32			baudRate;
+
+	bool			open;
+	bool			openPending;
+	bool			commandPending;
+	bool			closePending;
+	bool			chaseResponsePending;
+
+	wait_queue_head_t	wait_chase;		/* for handling sleeping while waiting for chase to finish */
+	wait_queue_head_t	wait_open;		/* for handling sleeping while waiting for open to finish */
+	wait_queue_head_t	wait_command;		/* for handling sleeping while waiting for command to finish */
+
+	struct usb_serial_port	*port;			/* loop back to the owner of this object */
+};
+
+
+/* This structure holds all of the individual device information */
+struct edgeport_serial {
+	char			name[MAX_NAME_LEN+2];		/* string name of this device */
+
+	struct edge_manuf_descriptor	manuf_descriptor;	/* the manufacturer descriptor */
+	struct edge_boot_descriptor	boot_descriptor;	/* the boot firmware descriptor */
+	struct edgeport_product_info	product_info;		/* Product Info */
+	struct edge_compatibility_descriptor epic_descriptor;	/* Edgeport compatible descriptor */
+	int			is_epic;			/* flag if EPiC device or not */
+
+	__u8			interrupt_in_endpoint;		/* the interrupt endpoint handle */
+	unsigned char		*interrupt_in_buffer;		/* the buffer we use for the interrupt endpoint */
+	struct urb		*interrupt_read_urb;		/* our interrupt urb */
+
+	__u8			bulk_in_endpoint;		/* the bulk in endpoint handle */
+	unsigned char		*bulk_in_buffer;		/* the buffer we use for the bulk in endpoint */
+	struct urb		*read_urb;			/* our bulk read urb */
+	bool			read_in_progress;
+	spinlock_t		es_lock;
+
+	__u8			bulk_out_endpoint;		/* the bulk out endpoint handle */
+
+	__s16			rxBytesAvail;			/* the number of bytes that we need to read from this device */
+
+	enum RXSTATE		rxState;			/* the current state of the bulk receive processor */
+	__u8			rxHeader1;			/* receive header byte 1 */
+	__u8			rxHeader2;			/* receive header byte 2 */
+	__u8			rxHeader3;			/* receive header byte 3 */
+	__u8			rxPort;				/* the port that we are currently receiving data for */
+	__u8			rxStatusCode;			/* the receive status code */
+	__u8			rxStatusParam;			/* the receive status paramater */
+	__s16			rxBytesRemaining;		/* the number of port bytes left to read */
+	struct usb_serial	*serial;			/* loop back to the owner of this object */
+};
+
+/* baud rate information */
+struct divisor_table_entry {
+	__u32   BaudRate;
+	__u16  Divisor;
+};
+
+/*
+ * Define table of divisors for Rev A EdgePort/4 hardware
+ * These assume a 3.6864MHz crystal, the standard /16, and
+ * MCR.7 = 0.
+ */
+
+static const struct divisor_table_entry divisor_table[] = {
+	{   50,		4608},
+	{   75,		3072},
+	{   110,	2095},	/* 2094.545455 => 230450   => .0217 % over */
+	{   134,	1713},	/* 1713.011152 => 230398.5 => .00065% under */
+	{   150,	1536},
+	{   300,	768},
+	{   600,	384},
+	{   1200,	192},
+	{   1800,	128},
+	{   2400,	96},
+	{   4800,	48},
+	{   7200,	32},
+	{   9600,	24},
+	{   14400,	16},
+	{   19200,	12},
+	{   38400,	6},
+	{   57600,	4},
+	{   115200,	2},
+	{   230400,	1},
+};
+
+/* Number of outstanding Command Write Urbs */
+static atomic_t CmdUrbs = ATOMIC_INIT(0);
+
+
+/* local function prototypes */
+
+/* function prototypes for all URB callbacks */
+static void edge_interrupt_callback(struct urb *urb);
+static void edge_bulk_in_callback(struct urb *urb);
+static void edge_bulk_out_data_callback(struct urb *urb);
+static void edge_bulk_out_cmd_callback(struct urb *urb);
+
+/* function prototypes for the usbserial callbacks */
+static int edge_open(struct tty_struct *tty, struct usb_serial_port *port);
+static void edge_close(struct usb_serial_port *port);
+static int edge_write(struct tty_struct *tty, struct usb_serial_port *port,
+					const unsigned char *buf, int count);
+static int edge_write_room(struct tty_struct *tty);
+static int edge_chars_in_buffer(struct tty_struct *tty);
+static void edge_throttle(struct tty_struct *tty);
+static void edge_unthrottle(struct tty_struct *tty);
+static void edge_set_termios(struct tty_struct *tty,
+					struct usb_serial_port *port,
+					struct ktermios *old_termios);
+static int  edge_ioctl(struct tty_struct *tty,
+					unsigned int cmd, unsigned long arg);
+static void edge_break(struct tty_struct *tty, int break_state);
+static int  edge_tiocmget(struct tty_struct *tty);
+static int  edge_tiocmset(struct tty_struct *tty,
+					unsigned int set, unsigned int clear);
+static int  edge_startup(struct usb_serial *serial);
+static void edge_disconnect(struct usb_serial *serial);
+static void edge_release(struct usb_serial *serial);
+static int edge_port_probe(struct usb_serial_port *port);
+static int edge_port_remove(struct usb_serial_port *port);
+
+#include "io_tables.h"	/* all of the devices that this driver supports */
+
+/* function prototypes for all of our local functions */
+
+static void  process_rcvd_data(struct edgeport_serial *edge_serial,
+				unsigned char *buffer, __u16 bufferLength);
+static void process_rcvd_status(struct edgeport_serial *edge_serial,
+				__u8 byte2, __u8 byte3);
+static void edge_tty_recv(struct usb_serial_port *port, unsigned char *data,
+		int length);
+static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr);
+static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData,
+				__u8 lsr, __u8 data);
+static int  send_iosp_ext_cmd(struct edgeport_port *edge_port, __u8 command,
+				__u8 param);
+static int  calc_baud_rate_divisor(struct device *dev, int baud_rate, int *divisor);
+static int  send_cmd_write_baud_rate(struct edgeport_port *edge_port,
+				int baudRate);
+static void change_port_settings(struct tty_struct *tty,
+				struct edgeport_port *edge_port,
+				struct ktermios *old_termios);
+static int  send_cmd_write_uart_register(struct edgeport_port *edge_port,
+				__u8 regNum, __u8 regValue);
+static int  write_cmd_usb(struct edgeport_port *edge_port,
+				unsigned char *buffer, int writeLength);
+static void send_more_port_data(struct edgeport_serial *edge_serial,
+				struct edgeport_port *edge_port);
+
+static int sram_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
+					__u16 length, const __u8 *data);
+static int rom_read(struct usb_serial *serial, __u16 extAddr, __u16 addr,
+						__u16 length, __u8 *data);
+static int rom_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
+					__u16 length, const __u8 *data);
+static void get_manufacturing_desc(struct edgeport_serial *edge_serial);
+static void get_boot_desc(struct edgeport_serial *edge_serial);
+static void load_application_firmware(struct edgeport_serial *edge_serial);
+
+static void unicode_to_ascii(char *string, int buflen,
+				__le16 *unicode, int unicode_size);
+
+
+/* ************************************************************************ */
+/* ************************************************************************ */
+/* ************************************************************************ */
+/* ************************************************************************ */
+
+/************************************************************************
+ *									*
+ * update_edgeport_E2PROM()	Compare current versions of		*
+ *				Boot ROM and Manufacture 		*
+ *				Descriptors with versions		*
+ *				embedded in this driver			*
+ *									*
+ ************************************************************************/
+static void update_edgeport_E2PROM(struct edgeport_serial *edge_serial)
+{
+	struct device *dev = &edge_serial->serial->dev->dev;
+	__u32 BootCurVer;
+	__u32 BootNewVer;
+	__u8 BootMajorVersion;
+	__u8 BootMinorVersion;
+	__u16 BootBuildNumber;
+	__u32 Bootaddr;
+	const struct ihex_binrec *rec;
+	const struct firmware *fw;
+	const char *fw_name;
+	int response;
+
+	switch (edge_serial->product_info.iDownloadFile) {
+	case EDGE_DOWNLOAD_FILE_I930:
+		fw_name	= "/*(DEBLOBBED)*/";
+		break;
+	case EDGE_DOWNLOAD_FILE_80251:
+		fw_name	= "/*(DEBLOBBED)*/";
+		break;
+	default:
+		return;
+	}
+
+	response = reject_firmware(&fw, fw_name,
+					 &edge_serial->serial->dev->dev);
+	if (response) {
+		dev_err(dev, "Failed to load image \"%s\" err %d\n",
+		       fw_name, response);
+		return;
+	}
+
+	rec = (const struct ihex_binrec *)fw->data;
+	BootMajorVersion = rec->data[0];
+	BootMinorVersion = rec->data[1];
+	BootBuildNumber = (rec->data[2] << 8) | rec->data[3];
+
+	/* Check Boot Image Version */
+	BootCurVer = (edge_serial->boot_descriptor.MajorVersion << 24) +
+		     (edge_serial->boot_descriptor.MinorVersion << 16) +
+		      le16_to_cpu(edge_serial->boot_descriptor.BuildNumber);
+
+	BootNewVer = (BootMajorVersion << 24) +
+		     (BootMinorVersion << 16) +
+		      BootBuildNumber;
+
+	dev_dbg(dev, "Current Boot Image version %d.%d.%d\n",
+	    edge_serial->boot_descriptor.MajorVersion,
+	    edge_serial->boot_descriptor.MinorVersion,
+	    le16_to_cpu(edge_serial->boot_descriptor.BuildNumber));
+
+
+	if (BootNewVer > BootCurVer) {
+		dev_dbg(dev, "**Update Boot Image from %d.%d.%d to %d.%d.%d\n",
+		    edge_serial->boot_descriptor.MajorVersion,
+		    edge_serial->boot_descriptor.MinorVersion,
+		    le16_to_cpu(edge_serial->boot_descriptor.BuildNumber),
+		    BootMajorVersion, BootMinorVersion, BootBuildNumber);
+
+		dev_dbg(dev, "Downloading new Boot Image\n");
+
+		for (rec = ihex_next_binrec(rec); rec;
+		     rec = ihex_next_binrec(rec)) {
+			Bootaddr = be32_to_cpu(rec->addr);
+			response = rom_write(edge_serial->serial,
+					     Bootaddr >> 16,
+					     Bootaddr & 0xFFFF,
+					     be16_to_cpu(rec->len),
+					     &rec->data[0]);
+			if (response < 0) {
+				dev_err(&edge_serial->serial->dev->dev,
+					"rom_write failed (%x, %x, %d)\n",
+					Bootaddr >> 16, Bootaddr & 0xFFFF,
+					be16_to_cpu(rec->len));
+				break;
+			}
+		}
+	} else {
+		dev_dbg(dev, "Boot Image -- already up to date\n");
+	}
+	release_firmware(fw);
+}
+
+#if 0
+/************************************************************************
+ *
+ *  Get string descriptor from device
+ *
+ ************************************************************************/
+static int get_string_desc(struct usb_device *dev, int Id,
+				struct usb_string_descriptor **pRetDesc)
+{
+	struct usb_string_descriptor StringDesc;
+	struct usb_string_descriptor *pStringDesc;
+
+	dev_dbg(&dev->dev, "%s - USB String ID = %d\n", __func__, Id);
+
+	if (!usb_get_descriptor(dev, USB_DT_STRING, Id, &StringDesc,
+						sizeof(StringDesc)))
+		return 0;
+
+	pStringDesc = kmalloc(StringDesc.bLength, GFP_KERNEL);
+	if (!pStringDesc)
+		return -1;
+
+	if (!usb_get_descriptor(dev, USB_DT_STRING, Id, pStringDesc,
+							StringDesc.bLength)) {
+		kfree(pStringDesc);
+		return -1;
+	}
+
+	*pRetDesc = pStringDesc;
+	return 0;
+}
+#endif
+
+static void dump_product_info(struct edgeport_serial *edge_serial,
+			      struct edgeport_product_info *product_info)
+{
+	struct device *dev = &edge_serial->serial->dev->dev;
+
+	/* Dump Product Info structure */
+	dev_dbg(dev, "**Product Information:\n");
+	dev_dbg(dev, "  ProductId             %x\n", product_info->ProductId);
+	dev_dbg(dev, "  NumPorts              %d\n", product_info->NumPorts);
+	dev_dbg(dev, "  ProdInfoVer           %d\n", product_info->ProdInfoVer);
+	dev_dbg(dev, "  IsServer              %d\n", product_info->IsServer);
+	dev_dbg(dev, "  IsRS232               %d\n", product_info->IsRS232);
+	dev_dbg(dev, "  IsRS422               %d\n", product_info->IsRS422);
+	dev_dbg(dev, "  IsRS485               %d\n", product_info->IsRS485);
+	dev_dbg(dev, "  RomSize               %d\n", product_info->RomSize);
+	dev_dbg(dev, "  RamSize               %d\n", product_info->RamSize);
+	dev_dbg(dev, "  CpuRev                %x\n", product_info->CpuRev);
+	dev_dbg(dev, "  BoardRev              %x\n", product_info->BoardRev);
+	dev_dbg(dev, "  BootMajorVersion      %d.%d.%d\n",
+		product_info->BootMajorVersion,
+		product_info->BootMinorVersion,
+		le16_to_cpu(product_info->BootBuildNumber));
+	dev_dbg(dev, "  FirmwareMajorVersion  %d.%d.%d\n",
+		product_info->FirmwareMajorVersion,
+		product_info->FirmwareMinorVersion,
+		le16_to_cpu(product_info->FirmwareBuildNumber));
+	dev_dbg(dev, "  ManufactureDescDate   %d/%d/%d\n",
+		product_info->ManufactureDescDate[0],
+		product_info->ManufactureDescDate[1],
+		product_info->ManufactureDescDate[2]+1900);
+	dev_dbg(dev, "  iDownloadFile         0x%x\n",
+		product_info->iDownloadFile);
+	dev_dbg(dev, "  EpicVer               %d\n", product_info->EpicVer);
+}
+
+static void get_product_info(struct edgeport_serial *edge_serial)
+{
+	struct edgeport_product_info *product_info = &edge_serial->product_info;
+
+	memset(product_info, 0, sizeof(struct edgeport_product_info));
+
+	product_info->ProductId = (__u16)(le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct) & ~ION_DEVICE_ID_80251_NETCHIP);
+	product_info->NumPorts = edge_serial->manuf_descriptor.NumPorts;
+	product_info->ProdInfoVer = 0;
+
+	product_info->RomSize = edge_serial->manuf_descriptor.RomSize;
+	product_info->RamSize = edge_serial->manuf_descriptor.RamSize;
+	product_info->CpuRev = edge_serial->manuf_descriptor.CpuRev;
+	product_info->BoardRev = edge_serial->manuf_descriptor.BoardRev;
+
+	product_info->BootMajorVersion =
+				edge_serial->boot_descriptor.MajorVersion;
+	product_info->BootMinorVersion =
+				edge_serial->boot_descriptor.MinorVersion;
+	product_info->BootBuildNumber =
+				edge_serial->boot_descriptor.BuildNumber;
+
+	memcpy(product_info->ManufactureDescDate,
+			edge_serial->manuf_descriptor.DescDate,
+			sizeof(edge_serial->manuf_descriptor.DescDate));
+
+	/* check if this is 2nd generation hardware */
+	if (le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct)
+					    & ION_DEVICE_ID_80251_NETCHIP)
+		product_info->iDownloadFile = EDGE_DOWNLOAD_FILE_80251;
+	else
+		product_info->iDownloadFile = EDGE_DOWNLOAD_FILE_I930;
+
+	/* Determine Product type and set appropriate flags */
+	switch (DEVICE_ID_FROM_USB_PRODUCT_ID(product_info->ProductId)) {
+	case ION_DEVICE_ID_EDGEPORT_COMPATIBLE:
+	case ION_DEVICE_ID_EDGEPORT_4T:
+	case ION_DEVICE_ID_EDGEPORT_4:
+	case ION_DEVICE_ID_EDGEPORT_2:
+	case ION_DEVICE_ID_EDGEPORT_8_DUAL_CPU:
+	case ION_DEVICE_ID_EDGEPORT_8:
+	case ION_DEVICE_ID_EDGEPORT_421:
+	case ION_DEVICE_ID_EDGEPORT_21:
+	case ION_DEVICE_ID_EDGEPORT_2_DIN:
+	case ION_DEVICE_ID_EDGEPORT_4_DIN:
+	case ION_DEVICE_ID_EDGEPORT_16_DUAL_CPU:
+		product_info->IsRS232 = 1;
+		break;
+
+	case ION_DEVICE_ID_EDGEPORT_2I:	/* Edgeport/2 RS422/RS485 */
+		product_info->IsRS422 = 1;
+		product_info->IsRS485 = 1;
+		break;
+
+	case ION_DEVICE_ID_EDGEPORT_8I:	/* Edgeport/4 RS422 */
+	case ION_DEVICE_ID_EDGEPORT_4I:	/* Edgeport/4 RS422 */
+		product_info->IsRS422 = 1;
+		break;
+	}
+
+	dump_product_info(edge_serial, product_info);
+}
+
+static int get_epic_descriptor(struct edgeport_serial *ep)
+{
+	int result;
+	struct usb_serial *serial = ep->serial;
+	struct edgeport_product_info *product_info = &ep->product_info;
+	struct edge_compatibility_descriptor *epic = &ep->epic_descriptor;
+	struct edge_compatibility_bits *bits;
+	struct device *dev = &serial->dev->dev;
+
+	ep->is_epic = 0;
+	result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
+				 USB_REQUEST_ION_GET_EPIC_DESC,
+				 0xC0, 0x00, 0x00,
+				 &ep->epic_descriptor,
+				 sizeof(struct edge_compatibility_descriptor),
+				 300);
+
+	if (result > 0) {
+		ep->is_epic = 1;
+		memset(product_info, 0, sizeof(struct edgeport_product_info));
+
+		product_info->NumPorts = epic->NumPorts;
+		product_info->ProdInfoVer = 0;
+		product_info->FirmwareMajorVersion = epic->MajorVersion;
+		product_info->FirmwareMinorVersion = epic->MinorVersion;
+		product_info->FirmwareBuildNumber = epic->BuildNumber;
+		product_info->iDownloadFile = epic->iDownloadFile;
+		product_info->EpicVer = epic->EpicVer;
+		product_info->Epic = epic->Supports;
+		product_info->ProductId = ION_DEVICE_ID_EDGEPORT_COMPATIBLE;
+		dump_product_info(ep, product_info);
+
+		bits = &ep->epic_descriptor.Supports;
+		dev_dbg(dev, "**EPIC descriptor:\n");
+		dev_dbg(dev, "  VendEnableSuspend: %s\n", bits->VendEnableSuspend ? "TRUE": "FALSE");
+		dev_dbg(dev, "  IOSPOpen         : %s\n", bits->IOSPOpen	? "TRUE": "FALSE");
+		dev_dbg(dev, "  IOSPClose        : %s\n", bits->IOSPClose	? "TRUE": "FALSE");
+		dev_dbg(dev, "  IOSPChase        : %s\n", bits->IOSPChase	? "TRUE": "FALSE");
+		dev_dbg(dev, "  IOSPSetRxFlow    : %s\n", bits->IOSPSetRxFlow	? "TRUE": "FALSE");
+		dev_dbg(dev, "  IOSPSetTxFlow    : %s\n", bits->IOSPSetTxFlow	? "TRUE": "FALSE");
+		dev_dbg(dev, "  IOSPSetXChar     : %s\n", bits->IOSPSetXChar	? "TRUE": "FALSE");
+		dev_dbg(dev, "  IOSPRxCheck      : %s\n", bits->IOSPRxCheck	? "TRUE": "FALSE");
+		dev_dbg(dev, "  IOSPSetClrBreak  : %s\n", bits->IOSPSetClrBreak	? "TRUE": "FALSE");
+		dev_dbg(dev, "  IOSPWriteMCR     : %s\n", bits->IOSPWriteMCR	? "TRUE": "FALSE");
+		dev_dbg(dev, "  IOSPWriteLCR     : %s\n", bits->IOSPWriteLCR	? "TRUE": "FALSE");
+		dev_dbg(dev, "  IOSPSetBaudRate  : %s\n", bits->IOSPSetBaudRate	? "TRUE": "FALSE");
+		dev_dbg(dev, "  TrueEdgeport     : %s\n", bits->TrueEdgeport	? "TRUE": "FALSE");
+	}
+
+	return result;
+}
+
+
+/************************************************************************/
+/************************************************************************/
+/*            U S B  C A L L B A C K   F U N C T I O N S                */
+/*            U S B  C A L L B A C K   F U N C T I O N S                */
+/************************************************************************/
+/************************************************************************/
+
+/*****************************************************************************
+ * edge_interrupt_callback
+ *	this is the callback function for when we have received data on the
+ *	interrupt endpoint.
+ *****************************************************************************/
+static void edge_interrupt_callback(struct urb *urb)
+{
+	struct edgeport_serial *edge_serial = urb->context;
+	struct device *dev;
+	struct edgeport_port *edge_port;
+	struct usb_serial_port *port;
+	unsigned char *data = urb->transfer_buffer;
+	int length = urb->actual_length;
+	int bytes_avail;
+	int position;
+	int txCredits;
+	int portNumber;
+	int result;
+	int status = urb->status;
+
+	switch (status) {
+	case 0:
+		/* success */
+		break;
+	case -ECONNRESET:
+	case -ENOENT:
+	case -ESHUTDOWN:
+		/* this urb is terminated, clean up */
+		dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n", __func__, status);
+		return;
+	default:
+		dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d\n", __func__, status);
+		goto exit;
+	}
+
+	dev = &edge_serial->serial->dev->dev;
+
+	/* process this interrupt-read even if there are no ports open */
+	if (length) {
+		usb_serial_debug_data(dev, __func__, length, data);
+
+		if (length > 1) {
+			bytes_avail = data[0] | (data[1] << 8);
+			if (bytes_avail) {
+				spin_lock(&edge_serial->es_lock);
+				edge_serial->rxBytesAvail += bytes_avail;
+				dev_dbg(dev,
+					"%s - bytes_avail=%d, rxBytesAvail=%d, read_in_progress=%d\n",
+					__func__, bytes_avail,
+					edge_serial->rxBytesAvail,
+					edge_serial->read_in_progress);
+
+				if (edge_serial->rxBytesAvail > 0 &&
+				    !edge_serial->read_in_progress) {
+					dev_dbg(dev, "%s - posting a read\n", __func__);
+					edge_serial->read_in_progress = true;
+
+					/* we have pending bytes on the
+					   bulk in pipe, send a request */
+					result = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC);
+					if (result) {
+						dev_err(dev,
+							"%s - usb_submit_urb(read bulk) failed with result = %d\n",
+							__func__, result);
+						edge_serial->read_in_progress = false;
+					}
+				}
+				spin_unlock(&edge_serial->es_lock);
+			}
+		}
+		/* grab the txcredits for the ports if available */
+		position = 2;
+		portNumber = 0;
+		while ((position < length) &&
+				(portNumber < edge_serial->serial->num_ports)) {
+			txCredits = data[position] | (data[position+1] << 8);
+			if (txCredits) {
+				port = edge_serial->serial->port[portNumber];
+				edge_port = usb_get_serial_port_data(port);
+				if (edge_port->open) {
+					spin_lock(&edge_port->ep_lock);
+					edge_port->txCredits += txCredits;
+					spin_unlock(&edge_port->ep_lock);
+					dev_dbg(dev, "%s - txcredits for port%d = %d\n",
+						__func__, portNumber,
+						edge_port->txCredits);
+
+					/* tell the tty driver that something
+					   has changed */
+					tty_port_tty_wakeup(&edge_port->port->port);
+					/* Since we have more credit, check
+					   if more data can be sent */
+					send_more_port_data(edge_serial,
+								edge_port);
+				}
+			}
+			position += 2;
+			++portNumber;
+		}
+	}
+
+exit:
+	result = usb_submit_urb(urb, GFP_ATOMIC);
+	if (result)
+		dev_err(&urb->dev->dev,
+			"%s - Error %d submitting control urb\n",
+						__func__, result);
+}
+
+
+/*****************************************************************************
+ * edge_bulk_in_callback
+ *	this is the callback function for when we have received data on the
+ *	bulk in endpoint.
+ *****************************************************************************/
+static void edge_bulk_in_callback(struct urb *urb)
+{
+	struct edgeport_serial	*edge_serial = urb->context;
+	struct device *dev;
+	unsigned char		*data = urb->transfer_buffer;
+	int			retval;
+	__u16			raw_data_length;
+	int status = urb->status;
+
+	if (status) {
+		dev_dbg(&urb->dev->dev, "%s - nonzero read bulk status received: %d\n",
+			__func__, status);
+		edge_serial->read_in_progress = false;
+		return;
+	}
+
+	if (urb->actual_length == 0) {
+		dev_dbg(&urb->dev->dev, "%s - read bulk callback with no data\n", __func__);
+		edge_serial->read_in_progress = false;
+		return;
+	}
+
+	dev = &edge_serial->serial->dev->dev;
+	raw_data_length = urb->actual_length;
+
+	usb_serial_debug_data(dev, __func__, raw_data_length, data);
+
+	spin_lock(&edge_serial->es_lock);
+
+	/* decrement our rxBytes available by the number that we just got */
+	edge_serial->rxBytesAvail -= raw_data_length;
+
+	dev_dbg(dev, "%s - Received = %d, rxBytesAvail %d\n", __func__,
+		raw_data_length, edge_serial->rxBytesAvail);
+
+	process_rcvd_data(edge_serial, data, urb->actual_length);
+
+	/* check to see if there's any more data for us to read */
+	if (edge_serial->rxBytesAvail > 0) {
+		dev_dbg(dev, "%s - posting a read\n", __func__);
+		retval = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC);
+		if (retval) {
+			dev_err(dev,
+				"%s - usb_submit_urb(read bulk) failed, retval = %d\n",
+				__func__, retval);
+			edge_serial->read_in_progress = false;
+		}
+	} else {
+		edge_serial->read_in_progress = false;
+	}
+
+	spin_unlock(&edge_serial->es_lock);
+}
+
+
+/*****************************************************************************
+ * edge_bulk_out_data_callback
+ *	this is the callback function for when we have finished sending
+ *	serial data on the bulk out endpoint.
+ *****************************************************************************/
+static void edge_bulk_out_data_callback(struct urb *urb)
+{
+	struct edgeport_port *edge_port = urb->context;
+	int status = urb->status;
+
+	if (status) {
+		dev_dbg(&urb->dev->dev,
+			"%s - nonzero write bulk status received: %d\n",
+			__func__, status);
+	}
+
+	if (edge_port->open)
+		tty_port_tty_wakeup(&edge_port->port->port);
+
+	/* Release the Write URB */
+	edge_port->write_in_progress = false;
+
+	/* Check if more data needs to be sent */
+	send_more_port_data((struct edgeport_serial *)
+		(usb_get_serial_data(edge_port->port->serial)), edge_port);
+}
+
+
+/*****************************************************************************
+ * BulkOutCmdCallback
+ *	this is the callback function for when we have finished sending a
+ *	command	on the bulk out endpoint.
+ *****************************************************************************/
+static void edge_bulk_out_cmd_callback(struct urb *urb)
+{
+	struct edgeport_port *edge_port = urb->context;
+	int status = urb->status;
+
+	atomic_dec(&CmdUrbs);
+	dev_dbg(&urb->dev->dev, "%s - FREE URB %p (outstanding %d)\n",
+		__func__, urb, atomic_read(&CmdUrbs));
+
+
+	/* clean up the transfer buffer */
+	kfree(urb->transfer_buffer);
+
+	/* Free the command urb */
+	usb_free_urb(urb);
+
+	if (status) {
+		dev_dbg(&urb->dev->dev,
+			"%s - nonzero write bulk status received: %d\n",
+			__func__, status);
+		return;
+	}
+
+	/* tell the tty driver that something has changed */
+	if (edge_port->open)
+		tty_port_tty_wakeup(&edge_port->port->port);
+
+	/* we have completed the command */
+	edge_port->commandPending = false;
+	wake_up(&edge_port->wait_command);
+}
+
+
+/*****************************************************************************
+ * Driver tty interface functions
+ *****************************************************************************/
+
+/*****************************************************************************
+ * SerialOpen
+ *	this function is called by the tty driver when a port is opened
+ *	If successful, we return 0
+ *	Otherwise we return a negative error number.
+ *****************************************************************************/
+static int edge_open(struct tty_struct *tty, struct usb_serial_port *port)
+{
+	struct edgeport_port *edge_port = usb_get_serial_port_data(port);
+	struct device *dev = &port->dev;
+	struct usb_serial *serial;
+	struct edgeport_serial *edge_serial;
+	int response;
+
+	if (edge_port == NULL)
+		return -ENODEV;
+
+	/* see if we've set up our endpoint info yet (can't set it up
+	   in edge_startup as the structures were not set up at that time.) */
+	serial = port->serial;
+	edge_serial = usb_get_serial_data(serial);
+	if (edge_serial == NULL)
+		return -ENODEV;
+	if (edge_serial->interrupt_in_buffer == NULL) {
+		struct usb_serial_port *port0 = serial->port[0];
+
+		/* not set up yet, so do it now */
+		edge_serial->interrupt_in_buffer =
+					port0->interrupt_in_buffer;
+		edge_serial->interrupt_in_endpoint =
+					port0->interrupt_in_endpointAddress;
+		edge_serial->interrupt_read_urb = port0->interrupt_in_urb;
+		edge_serial->bulk_in_buffer = port0->bulk_in_buffer;
+		edge_serial->bulk_in_endpoint =
+					port0->bulk_in_endpointAddress;
+		edge_serial->read_urb = port0->read_urb;
+		edge_serial->bulk_out_endpoint =
+					port0->bulk_out_endpointAddress;
+
+		/* set up our interrupt urb */
+		usb_fill_int_urb(edge_serial->interrupt_read_urb,
+		      serial->dev,
+		      usb_rcvintpipe(serial->dev,
+				port0->interrupt_in_endpointAddress),
+		      port0->interrupt_in_buffer,
+		      edge_serial->interrupt_read_urb->transfer_buffer_length,
+		      edge_interrupt_callback, edge_serial,
+		      edge_serial->interrupt_read_urb->interval);
+
+		/* set up our bulk in urb */
+		usb_fill_bulk_urb(edge_serial->read_urb, serial->dev,
+			usb_rcvbulkpipe(serial->dev,
+				port0->bulk_in_endpointAddress),
+			port0->bulk_in_buffer,
+			edge_serial->read_urb->transfer_buffer_length,
+			edge_bulk_in_callback, edge_serial);
+		edge_serial->read_in_progress = false;
+
+		/* start interrupt read for this edgeport
+		 * this interrupt will continue as long
+		 * as the edgeport is connected */
+		response = usb_submit_urb(edge_serial->interrupt_read_urb,
+								GFP_KERNEL);
+		if (response) {
+			dev_err(dev, "%s - Error %d submitting control urb\n",
+				__func__, response);
+		}
+	}
+
+	/* initialize our wait queues */
+	init_waitqueue_head(&edge_port->wait_open);
+	init_waitqueue_head(&edge_port->wait_chase);
+	init_waitqueue_head(&edge_port->wait_command);
+
+	/* initialize our port settings */
+	edge_port->txCredits = 0;	/* Can't send any data yet */
+	/* Must always set this bit to enable ints! */
+	edge_port->shadowMCR = MCR_MASTER_IE;
+	edge_port->chaseResponsePending = false;
+
+	/* send a open port command */
+	edge_port->openPending = true;
+	edge_port->open        = false;
+	response = send_iosp_ext_cmd(edge_port, IOSP_CMD_OPEN_PORT, 0);
+
+	if (response < 0) {
+		dev_err(dev, "%s - error sending open port command\n", __func__);
+		edge_port->openPending = false;
+		return -ENODEV;
+	}
+
+	/* now wait for the port to be completely opened */
+	wait_event_timeout(edge_port->wait_open, !edge_port->openPending,
+								OPEN_TIMEOUT);
+
+	if (!edge_port->open) {
+		/* open timed out */
+		dev_dbg(dev, "%s - open timedout\n", __func__);
+		edge_port->openPending = false;
+		return -ENODEV;
+	}
+
+	/* create the txfifo */
+	edge_port->txfifo.head	= 0;
+	edge_port->txfifo.tail	= 0;
+	edge_port->txfifo.count	= 0;
+	edge_port->txfifo.size	= edge_port->maxTxCredits;
+	edge_port->txfifo.fifo	= kmalloc(edge_port->maxTxCredits, GFP_KERNEL);
+
+	if (!edge_port->txfifo.fifo) {
+		edge_close(port);
+		return -ENOMEM;
+	}
+
+	/* Allocate a URB for the write */
+	edge_port->write_urb = usb_alloc_urb(0, GFP_KERNEL);
+	edge_port->write_in_progress = false;
+
+	if (!edge_port->write_urb) {
+		edge_close(port);
+		return -ENOMEM;
+	}
+
+	dev_dbg(dev, "%s - Initialize TX fifo to %d bytes\n",
+		__func__, edge_port->maxTxCredits);
+
+	return 0;
+}
+
+
+/************************************************************************
+ *
+ * block_until_chase_response
+ *
+ *	This function will block the close until one of the following:
+ *		1. Response to our Chase comes from Edgeport
+ *		2. A timeout of 10 seconds without activity has expired
+ *		   (1K of Edgeport data @ 2400 baud ==> 4 sec to empty)
+ *
+ ************************************************************************/
+static void block_until_chase_response(struct edgeport_port *edge_port)
+{
+	struct device *dev = &edge_port->port->dev;
+	DEFINE_WAIT(wait);
+	__u16 lastCredits;
+	int timeout = 1*HZ;
+	int loop = 10;
+
+	while (1) {
+		/* Save Last credits */
+		lastCredits = edge_port->txCredits;
+
+		/* Did we get our Chase response */
+		if (!edge_port->chaseResponsePending) {
+			dev_dbg(dev, "%s - Got Chase Response\n", __func__);
+
+			/* did we get all of our credit back? */
+			if (edge_port->txCredits == edge_port->maxTxCredits) {
+				dev_dbg(dev, "%s - Got all credits\n", __func__);
+				return;
+			}
+		}
+
+		/* Block the thread for a while */
+		prepare_to_wait(&edge_port->wait_chase, &wait,
+						TASK_UNINTERRUPTIBLE);
+		schedule_timeout(timeout);
+		finish_wait(&edge_port->wait_chase, &wait);
+
+		if (lastCredits == edge_port->txCredits) {
+			/* No activity.. count down. */
+			loop--;
+			if (loop == 0) {
+				edge_port->chaseResponsePending = false;
+				dev_dbg(dev, "%s - Chase TIMEOUT\n", __func__);
+				return;
+			}
+		} else {
+			/* Reset timeout value back to 10 seconds */
+			dev_dbg(dev, "%s - Last %d, Current %d\n", __func__,
+					lastCredits, edge_port->txCredits);
+			loop = 10;
+		}
+	}
+}
+
+
+/************************************************************************
+ *
+ * block_until_tx_empty
+ *
+ *	This function will block the close until one of the following:
+ *		1. TX count are 0
+ *		2. The edgeport has stopped
+ *		3. A timeout of 3 seconds without activity has expired
+ *
+ ************************************************************************/
+static void block_until_tx_empty(struct edgeport_port *edge_port)
+{
+	struct device *dev = &edge_port->port->dev;
+	DEFINE_WAIT(wait);
+	struct TxFifo *fifo = &edge_port->txfifo;
+	__u32 lastCount;
+	int timeout = HZ/10;
+	int loop = 30;
+
+	while (1) {
+		/* Save Last count */
+		lastCount = fifo->count;
+
+		/* Is the Edgeport Buffer empty? */
+		if (lastCount == 0) {
+			dev_dbg(dev, "%s - TX Buffer Empty\n", __func__);
+			return;
+		}
+
+		/* Block the thread for a while */
+		prepare_to_wait(&edge_port->wait_chase, &wait,
+						TASK_UNINTERRUPTIBLE);
+		schedule_timeout(timeout);
+		finish_wait(&edge_port->wait_chase, &wait);
+
+		dev_dbg(dev, "%s wait\n", __func__);
+
+		if (lastCount == fifo->count) {
+			/* No activity.. count down. */
+			loop--;
+			if (loop == 0) {
+				dev_dbg(dev, "%s - TIMEOUT\n", __func__);
+				return;
+			}
+		} else {
+			/* Reset timeout value back to seconds */
+			loop = 30;
+		}
+	}
+}
+
+
+/*****************************************************************************
+ * edge_close
+ *	this function is called by the tty driver when a port is closed
+ *****************************************************************************/
+static void edge_close(struct usb_serial_port *port)
+{
+	struct edgeport_serial *edge_serial;
+	struct edgeport_port *edge_port;
+	int status;
+
+	edge_serial = usb_get_serial_data(port->serial);
+	edge_port = usb_get_serial_port_data(port);
+	if (edge_serial == NULL || edge_port == NULL)
+		return;
+
+	/* block until tx is empty */
+	block_until_tx_empty(edge_port);
+
+	edge_port->closePending = true;
+
+	if ((!edge_serial->is_epic) ||
+	    ((edge_serial->is_epic) &&
+	     (edge_serial->epic_descriptor.Supports.IOSPChase))) {
+		/* flush and chase */
+		edge_port->chaseResponsePending = true;
+
+		dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CHASE_PORT\n", __func__);
+		status = send_iosp_ext_cmd(edge_port, IOSP_CMD_CHASE_PORT, 0);
+		if (status == 0)
+			/* block until chase finished */
+			block_until_chase_response(edge_port);
+		else
+			edge_port->chaseResponsePending = false;
+	}
+
+	if ((!edge_serial->is_epic) ||
+	    ((edge_serial->is_epic) &&
+	     (edge_serial->epic_descriptor.Supports.IOSPClose))) {
+	       /* close the port */
+		dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CLOSE_PORT\n", __func__);
+		send_iosp_ext_cmd(edge_port, IOSP_CMD_CLOSE_PORT, 0);
+	}
+
+	/* port->close = true; */
+	edge_port->closePending = false;
+	edge_port->open = false;
+	edge_port->openPending = false;
+
+	usb_kill_urb(edge_port->write_urb);
+
+	if (edge_port->write_urb) {
+		/* if this urb had a transfer buffer already
+				(old transfer) free it */
+		kfree(edge_port->write_urb->transfer_buffer);
+		usb_free_urb(edge_port->write_urb);
+		edge_port->write_urb = NULL;
+	}
+	kfree(edge_port->txfifo.fifo);
+	edge_port->txfifo.fifo = NULL;
+}
+
+/*****************************************************************************
+ * SerialWrite
+ *	this function is called by the tty driver when data should be written
+ *	to the port.
+ *	If successful, we return the number of bytes written, otherwise we
+ *	return a negative error number.
+ *****************************************************************************/
+static int edge_write(struct tty_struct *tty, struct usb_serial_port *port,
+					const unsigned char *data, int count)
+{
+	struct edgeport_port *edge_port = usb_get_serial_port_data(port);
+	struct TxFifo *fifo;
+	int copySize;
+	int bytesleft;
+	int firsthalf;
+	int secondhalf;
+	unsigned long flags;
+
+	if (edge_port == NULL)
+		return -ENODEV;
+
+	/* get a pointer to the Tx fifo */
+	fifo = &edge_port->txfifo;
+
+	spin_lock_irqsave(&edge_port->ep_lock, flags);
+
+	/* calculate number of bytes to put in fifo */
+	copySize = min((unsigned int)count,
+				(edge_port->txCredits - fifo->count));
+
+	dev_dbg(&port->dev, "%s of %d byte(s) Fifo room  %d -- will copy %d bytes\n",
+		__func__, count, edge_port->txCredits - fifo->count, copySize);
+
+	/* catch writes of 0 bytes which the tty driver likes to give us,
+	   and when txCredits is empty */
+	if (copySize == 0) {
+		dev_dbg(&port->dev, "%s - copySize = Zero\n", __func__);
+		goto finish_write;
+	}
+
+	/* queue the data
+	 * since we can never overflow the buffer we do not have to check for a
+	 * full condition
+	 *
+	 * the copy is done is two parts -- first fill to the end of the buffer
+	 * then copy the reset from the start of the buffer
+	 */
+	bytesleft = fifo->size - fifo->head;
+	firsthalf = min(bytesleft, copySize);
+	dev_dbg(&port->dev, "%s - copy %d bytes of %d into fifo \n", __func__,
+		firsthalf, bytesleft);
+
+	/* now copy our data */
+	memcpy(&fifo->fifo[fifo->head], data, firsthalf);
+	usb_serial_debug_data(&port->dev, __func__, firsthalf, &fifo->fifo[fifo->head]);
+
+	/* update the index and size */
+	fifo->head  += firsthalf;
+	fifo->count += firsthalf;
+
+	/* wrap the index */
+	if (fifo->head == fifo->size)
+		fifo->head = 0;
+
+	secondhalf = copySize-firsthalf;
+
+	if (secondhalf) {
+		dev_dbg(&port->dev, "%s - copy rest of data %d\n", __func__, secondhalf);
+		memcpy(&fifo->fifo[fifo->head], &data[firsthalf], secondhalf);
+		usb_serial_debug_data(&port->dev, __func__, secondhalf, &fifo->fifo[fifo->head]);
+		/* update the index and size */
+		fifo->count += secondhalf;
+		fifo->head  += secondhalf;
+		/* No need to check for wrap since we can not get to end of
+		 * the fifo in this part
+		 */
+	}
+
+finish_write:
+	spin_unlock_irqrestore(&edge_port->ep_lock, flags);
+
+	send_more_port_data((struct edgeport_serial *)
+			usb_get_serial_data(port->serial), edge_port);
+
+	dev_dbg(&port->dev, "%s wrote %d byte(s) TxCredits %d, Fifo %d\n",
+		__func__, copySize, edge_port->txCredits, fifo->count);
+
+	return copySize;
+}
+
+
+/************************************************************************
+ *
+ * send_more_port_data()
+ *
+ *	This routine attempts to write additional UART transmit data
+ *	to a port over the USB bulk pipe. It is called (1) when new
+ *	data has been written to a port's TxBuffer from higher layers
+ *	(2) when the peripheral sends us additional TxCredits indicating
+ *	that it can accept more	Tx data for a given port; and (3) when
+ *	a bulk write completes successfully and we want to see if we
+ *	can transmit more.
+ *
+ ************************************************************************/
+static void send_more_port_data(struct edgeport_serial *edge_serial,
+					struct edgeport_port *edge_port)
+{
+	struct TxFifo	*fifo = &edge_port->txfifo;
+	struct device	*dev = &edge_port->port->dev;
+	struct urb	*urb;
+	unsigned char	*buffer;
+	int		status;
+	int		count;
+	int		bytesleft;
+	int		firsthalf;
+	int		secondhalf;
+	unsigned long	flags;
+
+	spin_lock_irqsave(&edge_port->ep_lock, flags);
+
+	if (edge_port->write_in_progress ||
+	    !edge_port->open             ||
+	    (fifo->count == 0)) {
+		dev_dbg(dev, "%s EXIT - fifo %d, PendingWrite = %d\n",
+			__func__, fifo->count, edge_port->write_in_progress);
+		goto exit_send;
+	}
+
+	/* since the amount of data in the fifo will always fit into the
+	 * edgeport buffer we do not need to check the write length
+	 *
+	 * Do we have enough credits for this port to make it worthwhile
+	 * to bother queueing a write. If it's too small, say a few bytes,
+	 * it's better to wait for more credits so we can do a larger write.
+	 */
+	if (edge_port->txCredits < EDGE_FW_GET_TX_CREDITS_SEND_THRESHOLD(edge_port->maxTxCredits, EDGE_FW_BULK_MAX_PACKET_SIZE)) {
+		dev_dbg(dev, "%s Not enough credit - fifo %d TxCredit %d\n",
+			__func__, fifo->count, edge_port->txCredits);
+		goto exit_send;
+	}
+
+	/* lock this write */
+	edge_port->write_in_progress = true;
+
+	/* get a pointer to the write_urb */
+	urb = edge_port->write_urb;
+
+	/* make sure transfer buffer is freed */
+	kfree(urb->transfer_buffer);
+	urb->transfer_buffer = NULL;
+
+	/* build the data header for the buffer and port that we are about
+	   to send out */
+	count = fifo->count;
+	buffer = kmalloc(count+2, GFP_ATOMIC);
+	if (!buffer) {
+		edge_port->write_in_progress = false;
+		goto exit_send;
+	}
+	buffer[0] = IOSP_BUILD_DATA_HDR1(edge_port->port->port_number, count);
+	buffer[1] = IOSP_BUILD_DATA_HDR2(edge_port->port->port_number, count);
+
+	/* now copy our data */
+	bytesleft =  fifo->size - fifo->tail;
+	firsthalf = min(bytesleft, count);
+	memcpy(&buffer[2], &fifo->fifo[fifo->tail], firsthalf);
+	fifo->tail  += firsthalf;
+	fifo->count -= firsthalf;
+	if (fifo->tail == fifo->size)
+		fifo->tail = 0;
+
+	secondhalf = count-firsthalf;
+	if (secondhalf) {
+		memcpy(&buffer[2+firsthalf], &fifo->fifo[fifo->tail],
+								secondhalf);
+		fifo->tail  += secondhalf;
+		fifo->count -= secondhalf;
+	}
+
+	if (count)
+		usb_serial_debug_data(&edge_port->port->dev, __func__, count, &buffer[2]);
+
+	/* fill up the urb with all of our data and submit it */
+	usb_fill_bulk_urb(urb, edge_serial->serial->dev,
+			usb_sndbulkpipe(edge_serial->serial->dev,
+					edge_serial->bulk_out_endpoint),
+			buffer, count+2,
+			edge_bulk_out_data_callback, edge_port);
+
+	/* decrement the number of credits we have by the number we just sent */
+	edge_port->txCredits -= count;
+	edge_port->port->icount.tx += count;
+
+	status = usb_submit_urb(urb, GFP_ATOMIC);
+	if (status) {
+		/* something went wrong */
+		dev_err_console(edge_port->port,
+			"%s - usb_submit_urb(write bulk) failed, status = %d, data lost\n",
+				__func__, status);
+		edge_port->write_in_progress = false;
+
+		/* revert the credits as something bad happened. */
+		edge_port->txCredits += count;
+		edge_port->port->icount.tx -= count;
+	}
+	dev_dbg(dev, "%s wrote %d byte(s) TxCredit %d, Fifo %d\n",
+		__func__, count, edge_port->txCredits, fifo->count);
+
+exit_send:
+	spin_unlock_irqrestore(&edge_port->ep_lock, flags);
+}
+
+
+/*****************************************************************************
+ * edge_write_room
+ *	this function is called by the tty driver when it wants to know how
+ *	many bytes of data we can accept for a specific port. If successful,
+ *	we return the amount of room that we have for this port	(the txCredits)
+ *	otherwise we return a negative error number.
+ *****************************************************************************/
+static int edge_write_room(struct tty_struct *tty)
+{
+	struct usb_serial_port *port = tty->driver_data;
+	struct edgeport_port *edge_port = usb_get_serial_port_data(port);
+	int room;
+	unsigned long flags;
+
+	if (edge_port == NULL)
+		return 0;
+	if (edge_port->closePending)
+		return 0;
+
+	if (!edge_port->open) {
+		dev_dbg(&port->dev, "%s - port not opened\n", __func__);
+		return 0;
+	}
+
+	/* total of both buffers is still txCredit */
+	spin_lock_irqsave(&edge_port->ep_lock, flags);
+	room = edge_port->txCredits - edge_port->txfifo.count;
+	spin_unlock_irqrestore(&edge_port->ep_lock, flags);
+
+	dev_dbg(&port->dev, "%s - returns %d\n", __func__, room);
+	return room;
+}
+
+
+/*****************************************************************************
+ * edge_chars_in_buffer
+ *	this function is called by the tty driver when it wants to know how
+ *	many bytes of data we currently have outstanding in the port (data that
+ *	has been written, but hasn't made it out the port yet)
+ *	If successful, we return the number of bytes left to be written in the
+ *	system,
+ *	Otherwise we return a negative error number.
+ *****************************************************************************/
+static int edge_chars_in_buffer(struct tty_struct *tty)
+{
+	struct usb_serial_port *port = tty->driver_data;
+	struct edgeport_port *edge_port = usb_get_serial_port_data(port);
+	int num_chars;
+	unsigned long flags;
+
+	if (edge_port == NULL)
+		return 0;
+	if (edge_port->closePending)
+		return 0;
+
+	if (!edge_port->open) {
+		dev_dbg(&port->dev, "%s - port not opened\n", __func__);
+		return 0;
+	}
+
+	spin_lock_irqsave(&edge_port->ep_lock, flags);
+	num_chars = edge_port->maxTxCredits - edge_port->txCredits +
+						edge_port->txfifo.count;
+	spin_unlock_irqrestore(&edge_port->ep_lock, flags);
+	if (num_chars) {
+		dev_dbg(&port->dev, "%s - returns %d\n", __func__, num_chars);
+	}
+
+	return num_chars;
+}
+
+
+/*****************************************************************************
+ * SerialThrottle
+ *	this function is called by the tty driver when it wants to stop the data
+ *	being read from the port.
+ *****************************************************************************/
+static void edge_throttle(struct tty_struct *tty)
+{
+	struct usb_serial_port *port = tty->driver_data;
+	struct edgeport_port *edge_port = usb_get_serial_port_data(port);
+	int status;
+
+	if (edge_port == NULL)
+		return;
+
+	if (!edge_port->open) {
+		dev_dbg(&port->dev, "%s - port not opened\n", __func__);
+		return;
+	}
+
+	/* if we are implementing XON/XOFF, send the stop character */
+	if (I_IXOFF(tty)) {
+		unsigned char stop_char = STOP_CHAR(tty);
+		status = edge_write(tty, port, &stop_char, 1);
+		if (status <= 0)
+			return;
+	}
+
+	/* if we are implementing RTS/CTS, toggle that line */
+	if (tty->termios.c_cflag & CRTSCTS) {
+		edge_port->shadowMCR &= ~MCR_RTS;
+		status = send_cmd_write_uart_register(edge_port, MCR,
+							edge_port->shadowMCR);
+		if (status != 0)
+			return;
+	}
+}
+
+
+/*****************************************************************************
+ * edge_unthrottle
+ *	this function is called by the tty driver when it wants to resume the
+ *	data being read from the port (called after SerialThrottle is called)
+ *****************************************************************************/
+static void edge_unthrottle(struct tty_struct *tty)
+{
+	struct usb_serial_port *port = tty->driver_data;
+	struct edgeport_port *edge_port = usb_get_serial_port_data(port);
+	int status;
+
+	if (edge_port == NULL)
+		return;
+
+	if (!edge_port->open) {
+		dev_dbg(&port->dev, "%s - port not opened\n", __func__);
+		return;
+	}
+
+	/* if we are implementing XON/XOFF, send the start character */
+	if (I_IXOFF(tty)) {
+		unsigned char start_char = START_CHAR(tty);
+		status = edge_write(tty, port, &start_char, 1);
+		if (status <= 0)
+			return;
+	}
+	/* if we are implementing RTS/CTS, toggle that line */
+	if (tty->termios.c_cflag & CRTSCTS) {
+		edge_port->shadowMCR |= MCR_RTS;
+		send_cmd_write_uart_register(edge_port, MCR,
+						edge_port->shadowMCR);
+	}
+}
+
+
+/*****************************************************************************
+ * SerialSetTermios
+ *	this function is called by the tty driver when it wants to change
+ * the termios structure
+ *****************************************************************************/
+static void edge_set_termios(struct tty_struct *tty,
+	struct usb_serial_port *port, struct ktermios *old_termios)
+{
+	struct edgeport_port *edge_port = usb_get_serial_port_data(port);
+	unsigned int cflag;
+
+	cflag = tty->termios.c_cflag;
+	dev_dbg(&port->dev, "%s - clfag %08x iflag %08x\n", __func__, tty->termios.c_cflag, tty->termios.c_iflag);
+	dev_dbg(&port->dev, "%s - old clfag %08x old iflag %08x\n", __func__, old_termios->c_cflag, old_termios->c_iflag);
+
+	if (edge_port == NULL)
+		return;
+
+	if (!edge_port->open) {
+		dev_dbg(&port->dev, "%s - port not opened\n", __func__);
+		return;
+	}
+
+	/* change the port settings to the new ones specified */
+	change_port_settings(tty, edge_port, old_termios);
+}
+
+
+/*****************************************************************************
+ * get_lsr_info - get line status register info
+ *
+ * Purpose: Let user call ioctl() to get info when the UART physically
+ * 	    is emptied.  On bus types like RS485, the transmitter must
+ * 	    release the bus after transmitting. This must be done when
+ * 	    the transmit shift register is empty, not be done when the
+ * 	    transmit holding register is empty.  This functionality
+ * 	    allows an RS485 driver to be written in user space.
+ *****************************************************************************/
+static int get_lsr_info(struct edgeport_port *edge_port,
+						unsigned int __user *value)
+{
+	unsigned int result = 0;
+	unsigned long flags;
+
+	spin_lock_irqsave(&edge_port->ep_lock, flags);
+	if (edge_port->maxTxCredits == edge_port->txCredits &&
+	    edge_port->txfifo.count == 0) {
+		dev_dbg(&edge_port->port->dev, "%s -- Empty\n", __func__);
+		result = TIOCSER_TEMT;
+	}
+	spin_unlock_irqrestore(&edge_port->ep_lock, flags);
+
+	if (copy_to_user(value, &result, sizeof(int)))
+		return -EFAULT;
+	return 0;
+}
+
+static int edge_tiocmset(struct tty_struct *tty,
+					unsigned int set, unsigned int clear)
+{
+	struct usb_serial_port *port = tty->driver_data;
+	struct edgeport_port *edge_port = usb_get_serial_port_data(port);
+	unsigned int mcr;
+
+	mcr = edge_port->shadowMCR;
+	if (set & TIOCM_RTS)
+		mcr |= MCR_RTS;
+	if (set & TIOCM_DTR)
+		mcr |= MCR_DTR;
+	if (set & TIOCM_LOOP)
+		mcr |= MCR_LOOPBACK;
+
+	if (clear & TIOCM_RTS)
+		mcr &= ~MCR_RTS;
+	if (clear & TIOCM_DTR)
+		mcr &= ~MCR_DTR;
+	if (clear & TIOCM_LOOP)
+		mcr &= ~MCR_LOOPBACK;
+
+	edge_port->shadowMCR = mcr;
+
+	send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR);
+
+	return 0;
+}
+
+static int edge_tiocmget(struct tty_struct *tty)
+{
+	struct usb_serial_port *port = tty->driver_data;
+	struct edgeport_port *edge_port = usb_get_serial_port_data(port);
+	unsigned int result = 0;
+	unsigned int msr;
+	unsigned int mcr;
+
+	msr = edge_port->shadowMSR;
+	mcr = edge_port->shadowMCR;
+	result = ((mcr & MCR_DTR)	? TIOCM_DTR: 0)	  /* 0x002 */
+		  | ((mcr & MCR_RTS)	? TIOCM_RTS: 0)   /* 0x004 */
+		  | ((msr & EDGEPORT_MSR_CTS)	? TIOCM_CTS: 0)   /* 0x020 */
+		  | ((msr & EDGEPORT_MSR_CD)	? TIOCM_CAR: 0)   /* 0x040 */
+		  | ((msr & EDGEPORT_MSR_RI)	? TIOCM_RI:  0)   /* 0x080 */
+		  | ((msr & EDGEPORT_MSR_DSR)	? TIOCM_DSR: 0);  /* 0x100 */
+
+	return result;
+}
+
+static int get_serial_info(struct edgeport_port *edge_port,
+				struct serial_struct __user *retinfo)
+{
+	struct serial_struct tmp;
+
+	if (!retinfo)
+		return -EFAULT;
+
+	memset(&tmp, 0, sizeof(tmp));
+
+	tmp.type		= PORT_16550A;
+	tmp.line		= edge_port->port->minor;
+	tmp.port		= edge_port->port->port_number;
+	tmp.irq			= 0;
+	tmp.flags		= ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
+	tmp.xmit_fifo_size	= edge_port->maxTxCredits;
+	tmp.baud_base		= 9600;
+	tmp.close_delay		= 5*HZ;
+	tmp.closing_wait	= 30*HZ;
+
+	if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
+		return -EFAULT;
+	return 0;
+}
+
+
+/*****************************************************************************
+ * SerialIoctl
+ *	this function handles any ioctl calls to the driver
+ *****************************************************************************/
+static int edge_ioctl(struct tty_struct *tty,
+					unsigned int cmd, unsigned long arg)
+{
+	struct usb_serial_port *port = tty->driver_data;
+	DEFINE_WAIT(wait);
+	struct edgeport_port *edge_port = usb_get_serial_port_data(port);
+
+	switch (cmd) {
+	case TIOCSERGETLSR:
+		dev_dbg(&port->dev, "%s TIOCSERGETLSR\n", __func__);
+		return get_lsr_info(edge_port, (unsigned int __user *) arg);
+
+	case TIOCGSERIAL:
+		dev_dbg(&port->dev, "%s TIOCGSERIAL\n", __func__);
+		return get_serial_info(edge_port, (struct serial_struct __user *) arg);
+	}
+	return -ENOIOCTLCMD;
+}
+
+
+/*****************************************************************************
+ * SerialBreak
+ *	this function sends a break to the port
+ *****************************************************************************/
+static void edge_break(struct tty_struct *tty, int break_state)
+{
+	struct usb_serial_port *port = tty->driver_data;
+	struct edgeport_port *edge_port = usb_get_serial_port_data(port);
+	struct edgeport_serial *edge_serial = usb_get_serial_data(port->serial);
+	int status;
+
+	if ((!edge_serial->is_epic) ||
+	    ((edge_serial->is_epic) &&
+	     (edge_serial->epic_descriptor.Supports.IOSPChase))) {
+		/* flush and chase */
+		edge_port->chaseResponsePending = true;
+
+		dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CHASE_PORT\n", __func__);
+		status = send_iosp_ext_cmd(edge_port, IOSP_CMD_CHASE_PORT, 0);
+		if (status == 0) {
+			/* block until chase finished */
+			block_until_chase_response(edge_port);
+		} else {
+			edge_port->chaseResponsePending = false;
+		}
+	}
+
+	if ((!edge_serial->is_epic) ||
+	    ((edge_serial->is_epic) &&
+	     (edge_serial->epic_descriptor.Supports.IOSPSetClrBreak))) {
+		if (break_state == -1) {
+			dev_dbg(&port->dev, "%s - Sending IOSP_CMD_SET_BREAK\n", __func__);
+			status = send_iosp_ext_cmd(edge_port,
+						IOSP_CMD_SET_BREAK, 0);
+		} else {
+			dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CLEAR_BREAK\n", __func__);
+			status = send_iosp_ext_cmd(edge_port,
+						IOSP_CMD_CLEAR_BREAK, 0);
+		}
+		if (status)
+			dev_dbg(&port->dev, "%s - error sending break set/clear command.\n",
+				__func__);
+	}
+}
+
+
+/*****************************************************************************
+ * process_rcvd_data
+ *	this function handles the data received on the bulk in pipe.
+ *****************************************************************************/
+static void process_rcvd_data(struct edgeport_serial *edge_serial,
+				unsigned char *buffer, __u16 bufferLength)
+{
+	struct device *dev = &edge_serial->serial->dev->dev;
+	struct usb_serial_port *port;
+	struct edgeport_port *edge_port;
+	__u16 lastBufferLength;
+	__u16 rxLen;
+
+	lastBufferLength = bufferLength + 1;
+
+	while (bufferLength > 0) {
+		/* failsafe incase we get a message that we don't understand */
+		if (lastBufferLength == bufferLength) {
+			dev_dbg(dev, "%s - stuck in loop, exiting it.\n", __func__);
+			break;
+		}
+		lastBufferLength = bufferLength;
+
+		switch (edge_serial->rxState) {
+		case EXPECT_HDR1:
+			edge_serial->rxHeader1 = *buffer;
+			++buffer;
+			--bufferLength;
+
+			if (bufferLength == 0) {
+				edge_serial->rxState = EXPECT_HDR2;
+				break;
+			}
+			/* otherwise, drop on through */
+		case EXPECT_HDR2:
+			edge_serial->rxHeader2 = *buffer;
+			++buffer;
+			--bufferLength;
+
+			dev_dbg(dev, "%s - Hdr1=%02X Hdr2=%02X\n", __func__,
+				edge_serial->rxHeader1, edge_serial->rxHeader2);
+			/* Process depending on whether this header is
+			 * data or status */
+
+			if (IS_CMD_STAT_HDR(edge_serial->rxHeader1)) {
+				/* Decode this status header and go to
+				 * EXPECT_HDR1 (if we can process the status
+				 * with only 2 bytes), or go to EXPECT_HDR3 to
+				 * get the third byte. */
+				edge_serial->rxPort =
+				    IOSP_GET_HDR_PORT(edge_serial->rxHeader1);
+				edge_serial->rxStatusCode =
+				    IOSP_GET_STATUS_CODE(
+						edge_serial->rxHeader1);
+
+				if (!IOSP_STATUS_IS_2BYTE(
+						edge_serial->rxStatusCode)) {
+					/* This status needs additional bytes.
+					 * Save what we have and then wait for
+					 * more data.
+					 */
+					edge_serial->rxStatusParam
+						= edge_serial->rxHeader2;
+					edge_serial->rxState = EXPECT_HDR3;
+					break;
+				}
+				/* We have all the header bytes, process the
+				   status now */
+				process_rcvd_status(edge_serial,
+						edge_serial->rxHeader2, 0);
+				edge_serial->rxState = EXPECT_HDR1;
+				break;
+			} else {
+				edge_serial->rxPort =
+				    IOSP_GET_HDR_PORT(edge_serial->rxHeader1);
+				edge_serial->rxBytesRemaining =
+				    IOSP_GET_HDR_DATA_LEN(
+						edge_serial->rxHeader1,
+						edge_serial->rxHeader2);
+				dev_dbg(dev, "%s - Data for Port %u Len %u\n",
+					__func__,
+					edge_serial->rxPort,
+					edge_serial->rxBytesRemaining);
+
+				/* ASSERT(DevExt->RxPort < DevExt->NumPorts);
+				 * ASSERT(DevExt->RxBytesRemaining <
+				 *		IOSP_MAX_DATA_LENGTH);
+				 */
+
+				if (bufferLength == 0) {
+					edge_serial->rxState = EXPECT_DATA;
+					break;
+				}
+				/* Else, drop through */
+			}
+		case EXPECT_DATA: /* Expect data */
+			if (bufferLength < edge_serial->rxBytesRemaining) {
+				rxLen = bufferLength;
+				/* Expect data to start next buffer */
+				edge_serial->rxState = EXPECT_DATA;
+			} else {
+				/* BufLen >= RxBytesRemaining */
+				rxLen = edge_serial->rxBytesRemaining;
+				/* Start another header next time */
+				edge_serial->rxState = EXPECT_HDR1;
+			}
+
+			bufferLength -= rxLen;
+			edge_serial->rxBytesRemaining -= rxLen;
+
+			/* spit this data back into the tty driver if this
+			   port is open */
+			if (rxLen) {
+				port = edge_serial->serial->port[
+							edge_serial->rxPort];
+				edge_port = usb_get_serial_port_data(port);
+				if (edge_port->open) {
+					dev_dbg(dev, "%s - Sending %d bytes to TTY for port %d\n",
+						__func__, rxLen,
+						edge_serial->rxPort);
+					edge_tty_recv(edge_port->port, buffer,
+							rxLen);
+					edge_port->port->icount.rx += rxLen;
+				}
+				buffer += rxLen;
+			}
+			break;
+
+		case EXPECT_HDR3:	/* Expect 3rd byte of status header */
+			edge_serial->rxHeader3 = *buffer;
+			++buffer;
+			--bufferLength;
+
+			/* We have all the header bytes, process the
+			   status now */
+			process_rcvd_status(edge_serial,
+				edge_serial->rxStatusParam,
+				edge_serial->rxHeader3);
+			edge_serial->rxState = EXPECT_HDR1;
+			break;
+		}
+	}
+}
+
+
+/*****************************************************************************
+ * process_rcvd_status
+ *	this function handles the any status messages received on the
+ *	bulk in pipe.
+ *****************************************************************************/
+static void process_rcvd_status(struct edgeport_serial *edge_serial,
+						__u8 byte2, __u8 byte3)
+{
+	struct usb_serial_port *port;
+	struct edgeport_port *edge_port;
+	struct tty_struct *tty;
+	struct device *dev;
+	__u8 code = edge_serial->rxStatusCode;
+
+	/* switch the port pointer to the one being currently talked about */
+	port = edge_serial->serial->port[edge_serial->rxPort];
+	edge_port = usb_get_serial_port_data(port);
+	if (edge_port == NULL) {
+		dev_err(&edge_serial->serial->dev->dev,
+			"%s - edge_port == NULL for port %d\n",
+					__func__, edge_serial->rxPort);
+		return;
+	}
+	dev = &port->dev;
+
+	if (code == IOSP_EXT_STATUS) {
+		switch (byte2) {
+		case IOSP_EXT_STATUS_CHASE_RSP:
+			/* we want to do EXT status regardless of port
+			 * open/closed */
+			dev_dbg(dev, "%s - Port %u EXT CHASE_RSP Data = %02x\n",
+				__func__, edge_serial->rxPort, byte3);
+			/* Currently, the only EXT_STATUS is Chase, so process
+			 * here instead of one more call to one more subroutine
+			 * If/when more EXT_STATUS, there'll be more work to do
+			 * Also, we currently clear flag and close the port
+			 * regardless of content of above's Byte3.
+			 * We could choose to do something else when Byte3 says
+			 * Timeout on Chase from Edgeport, like wait longer in
+			 * block_until_chase_response, but for now we don't.
+			 */
+			edge_port->chaseResponsePending = false;
+			wake_up(&edge_port->wait_chase);
+			return;
+
+		case IOSP_EXT_STATUS_RX_CHECK_RSP:
+			dev_dbg(dev, "%s ========== Port %u CHECK_RSP Sequence = %02x =============\n",
+				__func__, edge_serial->rxPort, byte3);
+			/* Port->RxCheckRsp = true; */
+			return;
+		}
+	}
+
+	if (code == IOSP_STATUS_OPEN_RSP) {
+		edge_port->txCredits = GET_TX_BUFFER_SIZE(byte3);
+		edge_port->maxTxCredits = edge_port->txCredits;
+		dev_dbg(dev, "%s - Port %u Open Response Initial MSR = %02x TxBufferSize = %d\n",
+			__func__, edge_serial->rxPort, byte2, edge_port->txCredits);
+		handle_new_msr(edge_port, byte2);
+
+		/* send the current line settings to the port so we are
+		   in sync with any further termios calls */
+		tty = tty_port_tty_get(&edge_port->port->port);
+		if (tty) {
+			change_port_settings(tty,
+				edge_port, &tty->termios);
+			tty_kref_put(tty);
+		}
+
+		/* we have completed the open */
+		edge_port->openPending = false;
+		edge_port->open = true;
+		wake_up(&edge_port->wait_open);
+		return;
+	}
+
+	/* If port is closed, silently discard all rcvd status. We can
+	 * have cases where buffered status is received AFTER the close
+	 * port command is sent to the Edgeport.
+	 */
+	if (!edge_port->open || edge_port->closePending)
+		return;
+
+	switch (code) {
+	/* Not currently sent by Edgeport */
+	case IOSP_STATUS_LSR:
+		dev_dbg(dev, "%s - Port %u LSR Status = %02x\n",
+			__func__, edge_serial->rxPort, byte2);
+		handle_new_lsr(edge_port, false, byte2, 0);
+		break;
+
+	case IOSP_STATUS_LSR_DATA:
+		dev_dbg(dev, "%s - Port %u LSR Status = %02x, Data = %02x\n",
+			__func__, edge_serial->rxPort, byte2, byte3);
+		/* byte2 is LSR Register */
+		/* byte3 is broken data byte */
+		handle_new_lsr(edge_port, true, byte2, byte3);
+		break;
+	/*
+	 *	case IOSP_EXT_4_STATUS:
+	 *		dev_dbg(dev, "%s - Port %u LSR Status = %02x Data = %02x\n",
+	 *			__func__, edge_serial->rxPort, byte2, byte3);
+	 *		break;
+	 */
+	case IOSP_STATUS_MSR:
+		dev_dbg(dev, "%s - Port %u MSR Status = %02x\n",
+			__func__, edge_serial->rxPort, byte2);
+		/*
+		 * Process this new modem status and generate appropriate
+		 * events, etc, based on the new status. This routine
+		 * also saves the MSR in Port->ShadowMsr.
+		 */
+		handle_new_msr(edge_port, byte2);
+		break;
+
+	default:
+		dev_dbg(dev, "%s - Unrecognized IOSP status code %u\n", __func__, code);
+		break;
+	}
+}
+
+
+/*****************************************************************************
+ * edge_tty_recv
+ *	this function passes data on to the tty flip buffer
+ *****************************************************************************/
+static void edge_tty_recv(struct usb_serial_port *port, unsigned char *data,
+		int length)
+{
+	int cnt;
+
+	cnt = tty_insert_flip_string(&port->port, data, length);
+	if (cnt < length) {
+		dev_err(&port->dev, "%s - dropping data, %d bytes lost\n",
+				__func__, length - cnt);
+	}
+	data += cnt;
+	length -= cnt;
+
+	tty_flip_buffer_push(&port->port);
+}
+
+
+/*****************************************************************************
+ * handle_new_msr
+ *	this function handles any change to the msr register for a port.
+ *****************************************************************************/
+static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr)
+{
+	struct  async_icount *icount;
+
+	if (newMsr & (EDGEPORT_MSR_DELTA_CTS | EDGEPORT_MSR_DELTA_DSR |
+			EDGEPORT_MSR_DELTA_RI | EDGEPORT_MSR_DELTA_CD)) {
+		icount = &edge_port->port->icount;
+
+		/* update input line counters */
+		if (newMsr & EDGEPORT_MSR_DELTA_CTS)
+			icount->cts++;
+		if (newMsr & EDGEPORT_MSR_DELTA_DSR)
+			icount->dsr++;
+		if (newMsr & EDGEPORT_MSR_DELTA_CD)
+			icount->dcd++;
+		if (newMsr & EDGEPORT_MSR_DELTA_RI)
+			icount->rng++;
+		wake_up_interruptible(&edge_port->port->port.delta_msr_wait);
+	}
+
+	/* Save the new modem status */
+	edge_port->shadowMSR = newMsr & 0xf0;
+}
+
+
+/*****************************************************************************
+ * handle_new_lsr
+ *	this function handles any change to the lsr register for a port.
+ *****************************************************************************/
+static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData,
+							__u8 lsr, __u8 data)
+{
+	__u8 newLsr = (__u8) (lsr & (__u8)
+		(LSR_OVER_ERR | LSR_PAR_ERR | LSR_FRM_ERR | LSR_BREAK));
+	struct async_icount *icount;
+
+	edge_port->shadowLSR = lsr;
+
+	if (newLsr & LSR_BREAK) {
+		/*
+		 * Parity and Framing errors only count if they
+		 * occur exclusive of a break being
+		 * received.
+		 */
+		newLsr &= (__u8)(LSR_OVER_ERR | LSR_BREAK);
+	}
+
+	/* Place LSR data byte into Rx buffer */
+	if (lsrData)
+		edge_tty_recv(edge_port->port, &data, 1);
+
+	/* update input line counters */
+	icount = &edge_port->port->icount;
+	if (newLsr & LSR_BREAK)
+		icount->brk++;
+	if (newLsr & LSR_OVER_ERR)
+		icount->overrun++;
+	if (newLsr & LSR_PAR_ERR)
+		icount->parity++;
+	if (newLsr & LSR_FRM_ERR)
+		icount->frame++;
+}
+
+
+/****************************************************************************
+ * sram_write
+ *	writes a number of bytes to the Edgeport device's sram starting at the
+ *	given address.
+ *	If successful returns the number of bytes written, otherwise it returns
+ *	a negative error number of the problem.
+ ****************************************************************************/
+static int sram_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
+					__u16 length, const __u8 *data)
+{
+	int result;
+	__u16 current_length;
+	unsigned char *transfer_buffer;
+
+	dev_dbg(&serial->dev->dev, "%s - %x, %x, %d\n", __func__, extAddr, addr, length);
+
+	transfer_buffer =  kmalloc(64, GFP_KERNEL);
+	if (!transfer_buffer)
+		return -ENOMEM;
+
+	/* need to split these writes up into 64 byte chunks */
+	result = 0;
+	while (length > 0) {
+		if (length > 64)
+			current_length = 64;
+		else
+			current_length = length;
+
+/*		dev_dbg(&serial->dev->dev, "%s - writing %x, %x, %d\n", __func__, extAddr, addr, current_length); */
+		memcpy(transfer_buffer, data, current_length);
+		result = usb_control_msg(serial->dev,
+					usb_sndctrlpipe(serial->dev, 0),
+					USB_REQUEST_ION_WRITE_RAM,
+					0x40, addr, extAddr, transfer_buffer,
+					current_length, 300);
+		if (result < 0)
+			break;
+		length -= current_length;
+		addr += current_length;
+		data += current_length;
+	}
+
+	kfree(transfer_buffer);
+	return result;
+}
+
+
+/****************************************************************************
+ * rom_write
+ *	writes a number of bytes to the Edgeport device's ROM starting at the
+ *	given address.
+ *	If successful returns the number of bytes written, otherwise it returns
+ *	a negative error number of the problem.
+ ****************************************************************************/
+static int rom_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
+					__u16 length, const __u8 *data)
+{
+	int result;
+	__u16 current_length;
+	unsigned char *transfer_buffer;
+
+	transfer_buffer =  kmalloc(64, GFP_KERNEL);
+	if (!transfer_buffer)
+		return -ENOMEM;
+
+	/* need to split these writes up into 64 byte chunks */
+	result = 0;
+	while (length > 0) {
+		if (length > 64)
+			current_length = 64;
+		else
+			current_length = length;
+		memcpy(transfer_buffer, data, current_length);
+		result = usb_control_msg(serial->dev,
+					usb_sndctrlpipe(serial->dev, 0),
+					USB_REQUEST_ION_WRITE_ROM, 0x40,
+					addr, extAddr,
+					transfer_buffer, current_length, 300);
+		if (result < 0)
+			break;
+		length -= current_length;
+		addr += current_length;
+		data += current_length;
+	}
+
+	kfree(transfer_buffer);
+	return result;
+}
+
+
+/****************************************************************************
+ * rom_read
+ *	reads a number of bytes from the Edgeport device starting at the given
+ *	address.
+ *	If successful returns the number of bytes read, otherwise it returns
+ *	a negative error number of the problem.
+ ****************************************************************************/
+static int rom_read(struct usb_serial *serial, __u16 extAddr,
+					__u16 addr, __u16 length, __u8 *data)
+{
+	int result;
+	__u16 current_length;
+	unsigned char *transfer_buffer;
+
+	transfer_buffer =  kmalloc(64, GFP_KERNEL);
+	if (!transfer_buffer)
+		return -ENOMEM;
+
+	/* need to split these reads up into 64 byte chunks */
+	result = 0;
+	while (length > 0) {
+		if (length > 64)
+			current_length = 64;
+		else
+			current_length = length;
+		result = usb_control_msg(serial->dev,
+					usb_rcvctrlpipe(serial->dev, 0),
+					USB_REQUEST_ION_READ_ROM,
+					0xC0, addr, extAddr, transfer_buffer,
+					current_length, 300);
+		if (result < 0)
+			break;
+		memcpy(data, transfer_buffer, current_length);
+		length -= current_length;
+		addr += current_length;
+		data += current_length;
+	}
+
+	kfree(transfer_buffer);
+	return result;
+}
+
+
+/****************************************************************************
+ * send_iosp_ext_cmd
+ *	Is used to send a IOSP message to the Edgeport device
+ ****************************************************************************/
+static int send_iosp_ext_cmd(struct edgeport_port *edge_port,
+						__u8 command, __u8 param)
+{
+	unsigned char   *buffer;
+	unsigned char   *currentCommand;
+	int             length = 0;
+	int             status = 0;
+
+	buffer = kmalloc(10, GFP_ATOMIC);
+	if (!buffer)
+		return -ENOMEM;
+
+	currentCommand = buffer;
+
+	MAKE_CMD_EXT_CMD(&currentCommand, &length, edge_port->port->port_number,
+			 command, param);
+
+	status = write_cmd_usb(edge_port, buffer, length);
+	if (status) {
+		/* something bad happened, let's free up the memory */
+		kfree(buffer);
+	}
+
+	return status;
+}
+
+
+/*****************************************************************************
+ * write_cmd_usb
+ *	this function writes the given buffer out to the bulk write endpoint.
+ *****************************************************************************/
+static int write_cmd_usb(struct edgeport_port *edge_port,
+					unsigned char *buffer, int length)
+{
+	struct edgeport_serial *edge_serial =
+				usb_get_serial_data(edge_port->port->serial);
+	struct device *dev = &edge_port->port->dev;
+	int status = 0;
+	struct urb *urb;
+
+	usb_serial_debug_data(dev, __func__, length, buffer);
+
+	/* Allocate our next urb */
+	urb = usb_alloc_urb(0, GFP_ATOMIC);
+	if (!urb)
+		return -ENOMEM;
+
+	atomic_inc(&CmdUrbs);
+	dev_dbg(dev, "%s - ALLOCATE URB %p (outstanding %d)\n",
+		__func__, urb, atomic_read(&CmdUrbs));
+
+	usb_fill_bulk_urb(urb, edge_serial->serial->dev,
+			usb_sndbulkpipe(edge_serial->serial->dev,
+					edge_serial->bulk_out_endpoint),
+			buffer, length, edge_bulk_out_cmd_callback, edge_port);
+
+	edge_port->commandPending = true;
+	status = usb_submit_urb(urb, GFP_ATOMIC);
+
+	if (status) {
+		/* something went wrong */
+		dev_err(dev, "%s - usb_submit_urb(write command) failed, status = %d\n",
+			__func__, status);
+		usb_kill_urb(urb);
+		usb_free_urb(urb);
+		atomic_dec(&CmdUrbs);
+		return status;
+	}
+
+#if 0
+	wait_event(&edge_port->wait_command, !edge_port->commandPending);
+
+	if (edge_port->commandPending) {
+		/* command timed out */
+		dev_dbg(dev, "%s - command timed out\n", __func__);
+		status = -EINVAL;
+	}
+#endif
+	return status;
+}
+
+
+/*****************************************************************************
+ * send_cmd_write_baud_rate
+ *	this function sends the proper command to change the baud rate of the
+ *	specified port.
+ *****************************************************************************/
+static int send_cmd_write_baud_rate(struct edgeport_port *edge_port,
+								int baudRate)
+{
+	struct edgeport_serial *edge_serial =
+				usb_get_serial_data(edge_port->port->serial);
+	struct device *dev = &edge_port->port->dev;
+	unsigned char *cmdBuffer;
+	unsigned char *currCmd;
+	int cmdLen = 0;
+	int divisor;
+	int status;
+	u32 number = edge_port->port->port_number;
+
+	if (edge_serial->is_epic &&
+	    !edge_serial->epic_descriptor.Supports.IOSPSetBaudRate) {
+		dev_dbg(dev, "SendCmdWriteBaudRate - NOT Setting baud rate for port, baud = %d\n",
+			baudRate);
+		return 0;
+	}
+
+	dev_dbg(dev, "%s - baud = %d\n", __func__, baudRate);
+
+	status = calc_baud_rate_divisor(dev, baudRate, &divisor);
+	if (status) {
+		dev_err(dev, "%s - bad baud rate\n", __func__);
+		return status;
+	}
+
+	/* Alloc memory for the string of commands. */
+	cmdBuffer =  kmalloc(0x100, GFP_ATOMIC);
+	if (!cmdBuffer)
+		return -ENOMEM;
+
+	currCmd = cmdBuffer;
+
+	/* Enable access to divisor latch */
+	MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, LCR, LCR_DL_ENABLE);
+
+	/* Write the divisor itself */
+	MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, DLL, LOW8(divisor));
+	MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, DLM, HIGH8(divisor));
+
+	/* Restore original value to disable access to divisor latch */
+	MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, LCR,
+						edge_port->shadowLCR);
+
+	status = write_cmd_usb(edge_port, cmdBuffer, cmdLen);
+	if (status) {
+		/* something bad happened, let's free up the memory */
+		kfree(cmdBuffer);
+	}
+
+	return status;
+}
+
+
+/*****************************************************************************
+ * calc_baud_rate_divisor
+ *	this function calculates the proper baud rate divisor for the specified
+ *	baud rate.
+ *****************************************************************************/
+static int calc_baud_rate_divisor(struct device *dev, int baudrate, int *divisor)
+{
+	int i;
+	__u16 custom;
+
+	for (i = 0; i < ARRAY_SIZE(divisor_table); i++) {
+		if (divisor_table[i].BaudRate == baudrate) {
+			*divisor = divisor_table[i].Divisor;
+			return 0;
+		}
+	}
+
+	/* We have tried all of the standard baud rates
+	 * lets try to calculate the divisor for this baud rate
+	 * Make sure the baud rate is reasonable */
+	if (baudrate > 50 && baudrate < 230400) {
+		/* get divisor */
+		custom = (__u16)((230400L + baudrate/2) / baudrate);
+
+		*divisor = custom;
+
+		dev_dbg(dev, "%s - Baud %d = %d\n", __func__, baudrate, custom);
+		return 0;
+	}
+
+	return -1;
+}
+
+
+/*****************************************************************************
+ * send_cmd_write_uart_register
+ *  this function builds up a uart register message and sends to the device.
+ *****************************************************************************/
+static int send_cmd_write_uart_register(struct edgeport_port *edge_port,
+						__u8 regNum, __u8 regValue)
+{
+	struct edgeport_serial *edge_serial =
+				usb_get_serial_data(edge_port->port->serial);
+	struct device *dev = &edge_port->port->dev;
+	unsigned char *cmdBuffer;
+	unsigned char *currCmd;
+	unsigned long cmdLen = 0;
+	int status;
+
+	dev_dbg(dev, "%s - write to %s register 0x%02x\n",
+		(regNum == MCR) ? "MCR" : "LCR", __func__, regValue);
+
+	if (edge_serial->is_epic &&
+	    !edge_serial->epic_descriptor.Supports.IOSPWriteMCR &&
+	    regNum == MCR) {
+		dev_dbg(dev, "SendCmdWriteUartReg - Not writing to MCR Register\n");
+		return 0;
+	}
+
+	if (edge_serial->is_epic &&
+	    !edge_serial->epic_descriptor.Supports.IOSPWriteLCR &&
+	    regNum == LCR) {
+		dev_dbg(dev, "SendCmdWriteUartReg - Not writing to LCR Register\n");
+		return 0;
+	}
+
+	/* Alloc memory for the string of commands. */
+	cmdBuffer = kmalloc(0x10, GFP_ATOMIC);
+	if (cmdBuffer == NULL)
+		return -ENOMEM;
+
+	currCmd = cmdBuffer;
+
+	/* Build a cmd in the buffer to write the given register */
+	MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, edge_port->port->port_number,
+			   regNum, regValue);
+
+	status = write_cmd_usb(edge_port, cmdBuffer, cmdLen);
+	if (status) {
+		/* something bad happened, let's free up the memory */
+		kfree(cmdBuffer);
+	}
+
+	return status;
+}
+
+
+/*****************************************************************************
+ * change_port_settings
+ *	This routine is called to set the UART on the device to match the
+ *	specified new settings.
+ *****************************************************************************/
+
+static void change_port_settings(struct tty_struct *tty,
+	struct edgeport_port *edge_port, struct ktermios *old_termios)
+{
+	struct device *dev = &edge_port->port->dev;
+	struct edgeport_serial *edge_serial =
+			usb_get_serial_data(edge_port->port->serial);
+	int baud;
+	unsigned cflag;
+	__u8 mask = 0xff;
+	__u8 lData;
+	__u8 lParity;
+	__u8 lStop;
+	__u8 rxFlow;
+	__u8 txFlow;
+	int status;
+
+	if (!edge_port->open &&
+	    !edge_port->openPending) {
+		dev_dbg(dev, "%s - port not opened\n", __func__);
+		return;
+	}
+
+	cflag = tty->termios.c_cflag;
+
+	switch (cflag & CSIZE) {
+	case CS5:
+		lData = LCR_BITS_5; mask = 0x1f;
+		dev_dbg(dev, "%s - data bits = 5\n", __func__);
+		break;
+	case CS6:
+		lData = LCR_BITS_6; mask = 0x3f;
+		dev_dbg(dev, "%s - data bits = 6\n", __func__);
+		break;
+	case CS7:
+		lData = LCR_BITS_7; mask = 0x7f;
+		dev_dbg(dev, "%s - data bits = 7\n", __func__);
+		break;
+	default:
+	case CS8:
+		lData = LCR_BITS_8;
+		dev_dbg(dev, "%s - data bits = 8\n", __func__);
+		break;
+	}
+
+	lParity = LCR_PAR_NONE;
+	if (cflag & PARENB) {
+		if (cflag & CMSPAR) {
+			if (cflag & PARODD) {
+				lParity = LCR_PAR_MARK;
+				dev_dbg(dev, "%s - parity = mark\n", __func__);
+			} else {
+				lParity = LCR_PAR_SPACE;
+				dev_dbg(dev, "%s - parity = space\n", __func__);
+			}
+		} else if (cflag & PARODD) {
+			lParity = LCR_PAR_ODD;
+			dev_dbg(dev, "%s - parity = odd\n", __func__);
+		} else {
+			lParity = LCR_PAR_EVEN;
+			dev_dbg(dev, "%s - parity = even\n", __func__);
+		}
+	} else {
+		dev_dbg(dev, "%s - parity = none\n", __func__);
+	}
+
+	if (cflag & CSTOPB) {
+		lStop = LCR_STOP_2;
+		dev_dbg(dev, "%s - stop bits = 2\n", __func__);
+	} else {
+		lStop = LCR_STOP_1;
+		dev_dbg(dev, "%s - stop bits = 1\n", __func__);
+	}
+
+	/* figure out the flow control settings */
+	rxFlow = txFlow = 0x00;
+	if (cflag & CRTSCTS) {
+		rxFlow |= IOSP_RX_FLOW_RTS;
+		txFlow |= IOSP_TX_FLOW_CTS;
+		dev_dbg(dev, "%s - RTS/CTS is enabled\n", __func__);
+	} else {
+		dev_dbg(dev, "%s - RTS/CTS is disabled\n", __func__);
+	}
+
+	/* if we are implementing XON/XOFF, set the start and stop character
+	   in the device */
+	if (I_IXOFF(tty) || I_IXON(tty)) {
+		unsigned char stop_char  = STOP_CHAR(tty);
+		unsigned char start_char = START_CHAR(tty);
+
+		if ((!edge_serial->is_epic) ||
+		    ((edge_serial->is_epic) &&
+		     (edge_serial->epic_descriptor.Supports.IOSPSetXChar))) {
+			send_iosp_ext_cmd(edge_port,
+					IOSP_CMD_SET_XON_CHAR, start_char);
+			send_iosp_ext_cmd(edge_port,
+					IOSP_CMD_SET_XOFF_CHAR, stop_char);
+		}
+
+		/* if we are implementing INBOUND XON/XOFF */
+		if (I_IXOFF(tty)) {
+			rxFlow |= IOSP_RX_FLOW_XON_XOFF;
+			dev_dbg(dev, "%s - INBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x\n",
+				__func__, start_char, stop_char);
+		} else {
+			dev_dbg(dev, "%s - INBOUND XON/XOFF is disabled\n", __func__);
+		}
+
+		/* if we are implementing OUTBOUND XON/XOFF */
+		if (I_IXON(tty)) {
+			txFlow |= IOSP_TX_FLOW_XON_XOFF;
+			dev_dbg(dev, "%s - OUTBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x\n",
+				__func__, start_char, stop_char);
+		} else {
+			dev_dbg(dev, "%s - OUTBOUND XON/XOFF is disabled\n", __func__);
+		}
+	}
+
+	/* Set flow control to the configured value */
+	if ((!edge_serial->is_epic) ||
+	    ((edge_serial->is_epic) &&
+	     (edge_serial->epic_descriptor.Supports.IOSPSetRxFlow)))
+		send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_RX_FLOW, rxFlow);
+	if ((!edge_serial->is_epic) ||
+	    ((edge_serial->is_epic) &&
+	     (edge_serial->epic_descriptor.Supports.IOSPSetTxFlow)))
+		send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_TX_FLOW, txFlow);
+
+
+	edge_port->shadowLCR &= ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
+	edge_port->shadowLCR |= (lData | lParity | lStop);
+
+	edge_port->validDataMask = mask;
+
+	/* Send the updated LCR value to the EdgePort */
+	status = send_cmd_write_uart_register(edge_port, LCR,
+							edge_port->shadowLCR);
+	if (status != 0)
+		return;
+
+	/* set up the MCR register and send it to the EdgePort */
+	edge_port->shadowMCR = MCR_MASTER_IE;
+	if (cflag & CBAUD)
+		edge_port->shadowMCR |= (MCR_DTR | MCR_RTS);
+
+	status = send_cmd_write_uart_register(edge_port, MCR,
+						edge_port->shadowMCR);
+	if (status != 0)
+		return;
+
+	/* Determine divisor based on baud rate */
+	baud = tty_get_baud_rate(tty);
+	if (!baud) {
+		/* pick a default, any default... */
+		baud = 9600;
+	}
+
+	dev_dbg(dev, "%s - baud rate = %d\n", __func__, baud);
+	status = send_cmd_write_baud_rate(edge_port, baud);
+	if (status == -1) {
+		/* Speed change was not possible - put back the old speed */
+		baud = tty_termios_baud_rate(old_termios);
+		tty_encode_baud_rate(tty, baud, baud);
+	}
+}
+
+
+/****************************************************************************
+ * unicode_to_ascii
+ *	Turns a string from Unicode into ASCII.
+ *	Doesn't do a good job with any characters that are outside the normal
+ *	ASCII range, but it's only for debugging...
+ *	NOTE: expects the unicode in LE format
+ ****************************************************************************/
+static void unicode_to_ascii(char *string, int buflen,
+					__le16 *unicode, int unicode_size)
+{
+	int i;
+
+	if (buflen <= 0)	/* never happens, but... */
+		return;
+	--buflen;		/* space for nul */
+
+	for (i = 0; i < unicode_size; i++) {
+		if (i >= buflen)
+			break;
+		string[i] = (char)(le16_to_cpu(unicode[i]));
+	}
+	string[i] = 0x00;
+}
+
+
+/****************************************************************************
+ * get_manufacturing_desc
+ *	reads in the manufacturing descriptor and stores it into the serial
+ *	structure.
+ ****************************************************************************/
+static void get_manufacturing_desc(struct edgeport_serial *edge_serial)
+{
+	struct device *dev = &edge_serial->serial->dev->dev;
+	int response;
+
+	dev_dbg(dev, "getting manufacturer descriptor\n");
+
+	response = rom_read(edge_serial->serial,
+				(EDGE_MANUF_DESC_ADDR & 0xffff0000) >> 16,
+				(__u16)(EDGE_MANUF_DESC_ADDR & 0x0000ffff),
+				EDGE_MANUF_DESC_LEN,
+				(__u8 *)(&edge_serial->manuf_descriptor));
+
+	if (response < 1)
+		dev_err(dev, "error in getting manufacturer descriptor\n");
+	else {
+		char string[30];
+		dev_dbg(dev, "**Manufacturer Descriptor\n");
+		dev_dbg(dev, "  RomSize:        %dK\n",
+			edge_serial->manuf_descriptor.RomSize);
+		dev_dbg(dev, "  RamSize:        %dK\n",
+			edge_serial->manuf_descriptor.RamSize);
+		dev_dbg(dev, "  CpuRev:         %d\n",
+			edge_serial->manuf_descriptor.CpuRev);
+		dev_dbg(dev, "  BoardRev:       %d\n",
+			edge_serial->manuf_descriptor.BoardRev);
+		dev_dbg(dev, "  NumPorts:       %d\n",
+			edge_serial->manuf_descriptor.NumPorts);
+		dev_dbg(dev, "  DescDate:       %d/%d/%d\n",
+			edge_serial->manuf_descriptor.DescDate[0],
+			edge_serial->manuf_descriptor.DescDate[1],
+			edge_serial->manuf_descriptor.DescDate[2]+1900);
+		unicode_to_ascii(string, sizeof(string),
+			edge_serial->manuf_descriptor.SerialNumber,
+			edge_serial->manuf_descriptor.SerNumLength/2);
+		dev_dbg(dev, "  SerialNumber: %s\n", string);
+		unicode_to_ascii(string, sizeof(string),
+			edge_serial->manuf_descriptor.AssemblyNumber,
+			edge_serial->manuf_descriptor.AssemblyNumLength/2);
+		dev_dbg(dev, "  AssemblyNumber: %s\n", string);
+		unicode_to_ascii(string, sizeof(string),
+		    edge_serial->manuf_descriptor.OemAssyNumber,
+		    edge_serial->manuf_descriptor.OemAssyNumLength/2);
+		dev_dbg(dev, "  OemAssyNumber:  %s\n", string);
+		dev_dbg(dev, "  UartType:       %d\n",
+			edge_serial->manuf_descriptor.UartType);
+		dev_dbg(dev, "  IonPid:         %d\n",
+			edge_serial->manuf_descriptor.IonPid);
+		dev_dbg(dev, "  IonConfig:      %d\n",
+			edge_serial->manuf_descriptor.IonConfig);
+	}
+}
+
+
+/****************************************************************************
+ * get_boot_desc
+ *	reads in the bootloader descriptor and stores it into the serial
+ *	structure.
+ ****************************************************************************/
+static void get_boot_desc(struct edgeport_serial *edge_serial)
+{
+	struct device *dev = &edge_serial->serial->dev->dev;
+	int response;
+
+	dev_dbg(dev, "getting boot descriptor\n");
+
+	response = rom_read(edge_serial->serial,
+				(EDGE_BOOT_DESC_ADDR & 0xffff0000) >> 16,
+				(__u16)(EDGE_BOOT_DESC_ADDR & 0x0000ffff),
+				EDGE_BOOT_DESC_LEN,
+				(__u8 *)(&edge_serial->boot_descriptor));
+
+	if (response < 1)
+		dev_err(dev, "error in getting boot descriptor\n");
+	else {
+		dev_dbg(dev, "**Boot Descriptor:\n");
+		dev_dbg(dev, "  BootCodeLength: %d\n",
+			le16_to_cpu(edge_serial->boot_descriptor.BootCodeLength));
+		dev_dbg(dev, "  MajorVersion:   %d\n",
+			edge_serial->boot_descriptor.MajorVersion);
+		dev_dbg(dev, "  MinorVersion:   %d\n",
+			edge_serial->boot_descriptor.MinorVersion);
+		dev_dbg(dev, "  BuildNumber:    %d\n",
+			le16_to_cpu(edge_serial->boot_descriptor.BuildNumber));
+		dev_dbg(dev, "  Capabilities:   0x%x\n",
+		      le16_to_cpu(edge_serial->boot_descriptor.Capabilities));
+		dev_dbg(dev, "  UConfig0:       %d\n",
+			edge_serial->boot_descriptor.UConfig0);
+		dev_dbg(dev, "  UConfig1:       %d\n",
+			edge_serial->boot_descriptor.UConfig1);
+	}
+}
+
+
+/****************************************************************************
+ * load_application_firmware
+ *	This is called to load the application firmware to the device
+ ****************************************************************************/
+static void load_application_firmware(struct edgeport_serial *edge_serial)
+{
+	struct device *dev = &edge_serial->serial->dev->dev;
+	const struct ihex_binrec *rec;
+	const struct firmware *fw;
+	const char *fw_name;
+	const char *fw_info;
+	int response;
+	__u32 Operaddr;
+	__u16 build;
+
+	switch (edge_serial->product_info.iDownloadFile) {
+		case EDGE_DOWNLOAD_FILE_I930:
+			fw_info = "downloading firmware version (930)";
+			fw_name	= "/*(DEBLOBBED)*/";
+			break;
+
+		case EDGE_DOWNLOAD_FILE_80251:
+			fw_info = "downloading firmware version (80251)";
+			fw_name	= "/*(DEBLOBBED)*/";
+			break;
+
+		case EDGE_DOWNLOAD_FILE_NONE:
+			dev_dbg(dev, "No download file specified, skipping download\n");
+			return;
+
+		default:
+			return;
+	}
+
+	response = reject_firmware(&fw, fw_name,
+				    &edge_serial->serial->dev->dev);
+	if (response) {
+		dev_err(dev, "Failed to load image \"%s\" err %d\n",
+		       fw_name, response);
+		return;
+	}
+
+	rec = (const struct ihex_binrec *)fw->data;
+	build = (rec->data[2] << 8) | rec->data[3];
+
+	dev_dbg(dev, "%s %d.%d.%d\n", fw_info, rec->data[0], rec->data[1], build);
+
+	edge_serial->product_info.FirmwareMajorVersion = rec->data[0];
+	edge_serial->product_info.FirmwareMinorVersion = rec->data[1];
+	edge_serial->product_info.FirmwareBuildNumber = cpu_to_le16(build);
+
+	for (rec = ihex_next_binrec(rec); rec;
+	     rec = ihex_next_binrec(rec)) {
+		Operaddr = be32_to_cpu(rec->addr);
+		response = sram_write(edge_serial->serial,
+				     Operaddr >> 16,
+				     Operaddr & 0xFFFF,
+				     be16_to_cpu(rec->len),
+				     &rec->data[0]);
+		if (response < 0) {
+			dev_err(&edge_serial->serial->dev->dev,
+				"sram_write failed (%x, %x, %d)\n",
+				Operaddr >> 16, Operaddr & 0xFFFF,
+				be16_to_cpu(rec->len));
+			break;
+		}
+	}
+
+	dev_dbg(dev, "sending exec_dl_code\n");
+	response = usb_control_msg (edge_serial->serial->dev,
+				    usb_sndctrlpipe(edge_serial->serial->dev, 0),
+				    USB_REQUEST_ION_EXEC_DL_CODE,
+				    0x40, 0x4000, 0x0001, NULL, 0, 3000);
+
+	release_firmware(fw);
+}
+
+
+/****************************************************************************
+ * edge_startup
+ ****************************************************************************/
+static int edge_startup(struct usb_serial *serial)
+{
+	struct edgeport_serial *edge_serial;
+	struct usb_device *dev;
+	struct device *ddev = &serial->dev->dev;
+	int i;
+	int response;
+	bool interrupt_in_found;
+	bool bulk_in_found;
+	bool bulk_out_found;
+	static __u32 descriptor[3] = {	EDGE_COMPATIBILITY_MASK0,
+					EDGE_COMPATIBILITY_MASK1,
+					EDGE_COMPATIBILITY_MASK2 };
+
+	dev = serial->dev;
+
+	/* create our private serial structure */
+	edge_serial = kzalloc(sizeof(struct edgeport_serial), GFP_KERNEL);
+	if (!edge_serial)
+		return -ENOMEM;
+
+	spin_lock_init(&edge_serial->es_lock);
+	edge_serial->serial = serial;
+	usb_set_serial_data(serial, edge_serial);
+
+	/* get the name for the device from the device */
+	i = usb_string(dev, dev->descriptor.iManufacturer,
+	    &edge_serial->name[0], MAX_NAME_LEN+1);
+	if (i < 0)
+		i = 0;
+	edge_serial->name[i++] = ' ';
+	usb_string(dev, dev->descriptor.iProduct,
+	    &edge_serial->name[i], MAX_NAME_LEN+2 - i);
+
+	dev_info(&serial->dev->dev, "%s detected\n", edge_serial->name);
+
+	/* Read the epic descriptor */
+	if (get_epic_descriptor(edge_serial) <= 0) {
+		/* memcpy descriptor to Supports structures */
+		memcpy(&edge_serial->epic_descriptor.Supports, descriptor,
+		       sizeof(struct edge_compatibility_bits));
+
+		/* get the manufacturing descriptor for this device */
+		get_manufacturing_desc(edge_serial);
+
+		/* get the boot descriptor */
+		get_boot_desc(edge_serial);
+
+		get_product_info(edge_serial);
+	}
+
+	/* set the number of ports from the manufacturing description */
+	/* serial->num_ports = serial->product_info.NumPorts; */
+	if ((!edge_serial->is_epic) &&
+	    (edge_serial->product_info.NumPorts != serial->num_ports)) {
+		dev_warn(ddev,
+			"Device Reported %d serial ports vs. core thinking we have %d ports, email greg@kroah.com this information.\n",
+			 edge_serial->product_info.NumPorts,
+			 serial->num_ports);
+	}
+
+	dev_dbg(ddev, "%s - time 1 %ld\n", __func__, jiffies);
+
+	/* If not an EPiC device */
+	if (!edge_serial->is_epic) {
+		/* now load the application firmware into this device */
+		load_application_firmware(edge_serial);
+
+		dev_dbg(ddev, "%s - time 2 %ld\n", __func__, jiffies);
+
+		/* Check current Edgeport EEPROM and update if necessary */
+		update_edgeport_E2PROM(edge_serial);
+
+		dev_dbg(ddev, "%s - time 3 %ld\n", __func__, jiffies);
+
+		/* set the configuration to use #1 */
+/*		dev_dbg(ddev, "set_configuration 1\n"); */
+/*		usb_set_configuration (dev, 1); */
+	}
+	dev_dbg(ddev, "  FirmwareMajorVersion  %d.%d.%d\n",
+	    edge_serial->product_info.FirmwareMajorVersion,
+	    edge_serial->product_info.FirmwareMinorVersion,
+	    le16_to_cpu(edge_serial->product_info.FirmwareBuildNumber));
+
+	/* we set up the pointers to the endpoints in the edge_open function,
+	 * as the structures aren't created yet. */
+
+	response = 0;
+
+	if (edge_serial->is_epic) {
+		/* EPIC thing, set up our interrupt polling now and our read
+		 * urb, so that the device knows it really is connected. */
+		interrupt_in_found = bulk_in_found = bulk_out_found = false;
+		for (i = 0; i < serial->interface->altsetting[0]
+						.desc.bNumEndpoints; ++i) {
+			struct usb_endpoint_descriptor *endpoint;
+			int buffer_size;
+
+			endpoint = &serial->interface->altsetting[0].
+							endpoint[i].desc;
+			buffer_size = usb_endpoint_maxp(endpoint);
+			if (!interrupt_in_found &&
+			    (usb_endpoint_is_int_in(endpoint))) {
+				/* we found a interrupt in endpoint */
+				dev_dbg(ddev, "found interrupt in\n");
+
+				/* not set up yet, so do it now */
+				edge_serial->interrupt_read_urb =
+						usb_alloc_urb(0, GFP_KERNEL);
+				if (!edge_serial->interrupt_read_urb)
+					return -ENOMEM;
+
+				edge_serial->interrupt_in_buffer =
+					kmalloc(buffer_size, GFP_KERNEL);
+				if (!edge_serial->interrupt_in_buffer) {
+					usb_free_urb(edge_serial->interrupt_read_urb);
+					return -ENOMEM;
+				}
+				edge_serial->interrupt_in_endpoint =
+						endpoint->bEndpointAddress;
+
+				/* set up our interrupt urb */
+				usb_fill_int_urb(
+					edge_serial->interrupt_read_urb,
+					dev,
+					usb_rcvintpipe(dev,
+						endpoint->bEndpointAddress),
+					edge_serial->interrupt_in_buffer,
+					buffer_size,
+					edge_interrupt_callback,
+					edge_serial,
+					endpoint->bInterval);
+
+				interrupt_in_found = true;
+			}
+
+			if (!bulk_in_found &&
+				(usb_endpoint_is_bulk_in(endpoint))) {
+				/* we found a bulk in endpoint */
+				dev_dbg(ddev, "found bulk in\n");
+
+				/* not set up yet, so do it now */
+				edge_serial->read_urb =
+						usb_alloc_urb(0, GFP_KERNEL);
+				if (!edge_serial->read_urb)
+					return -ENOMEM;
+
+				edge_serial->bulk_in_buffer =
+					kmalloc(buffer_size, GFP_KERNEL);
+				if (!edge_serial->bulk_in_buffer) {
+					usb_free_urb(edge_serial->read_urb);
+					return -ENOMEM;
+				}
+				edge_serial->bulk_in_endpoint =
+						endpoint->bEndpointAddress;
+
+				/* set up our bulk in urb */
+				usb_fill_bulk_urb(edge_serial->read_urb, dev,
+					usb_rcvbulkpipe(dev,
+						endpoint->bEndpointAddress),
+					edge_serial->bulk_in_buffer,
+					usb_endpoint_maxp(endpoint),
+					edge_bulk_in_callback,
+					edge_serial);
+				bulk_in_found = true;
+			}
+
+			if (!bulk_out_found &&
+			    (usb_endpoint_is_bulk_out(endpoint))) {
+				/* we found a bulk out endpoint */
+				dev_dbg(ddev, "found bulk out\n");
+				edge_serial->bulk_out_endpoint =
+						endpoint->bEndpointAddress;
+				bulk_out_found = true;
+			}
+		}
+
+		if (!interrupt_in_found || !bulk_in_found || !bulk_out_found) {
+			dev_err(ddev, "Error - the proper endpoints were not found!\n");
+			return -ENODEV;
+		}
+
+		/* start interrupt read for this edgeport this interrupt will
+		 * continue as long as the edgeport is connected */
+		response = usb_submit_urb(edge_serial->interrupt_read_urb,
+								GFP_KERNEL);
+		if (response)
+			dev_err(ddev, "%s - Error %d submitting control urb\n",
+				__func__, response);
+	}
+	return response;
+}
+
+
+/****************************************************************************
+ * edge_disconnect
+ *	This function is called whenever the device is removed from the usb bus.
+ ****************************************************************************/
+static void edge_disconnect(struct usb_serial *serial)
+{
+	struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
+
+	/* stop reads and writes on all ports */
+	/* free up our endpoint stuff */
+	if (edge_serial->is_epic) {
+		usb_kill_urb(edge_serial->interrupt_read_urb);
+		usb_free_urb(edge_serial->interrupt_read_urb);
+		kfree(edge_serial->interrupt_in_buffer);
+
+		usb_kill_urb(edge_serial->read_urb);
+		usb_free_urb(edge_serial->read_urb);
+		kfree(edge_serial->bulk_in_buffer);
+	}
+}
+
+
+/****************************************************************************
+ * edge_release
+ *	This function is called when the device structure is deallocated.
+ ****************************************************************************/
+static void edge_release(struct usb_serial *serial)
+{
+	struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
+
+	kfree(edge_serial);
+}
+
+static int edge_port_probe(struct usb_serial_port *port)
+{
+	struct edgeport_port *edge_port;
+
+	edge_port = kzalloc(sizeof(*edge_port), GFP_KERNEL);
+	if (!edge_port)
+		return -ENOMEM;
+
+	spin_lock_init(&edge_port->ep_lock);
+	edge_port->port = port;
+
+	usb_set_serial_port_data(port, edge_port);
+
+	return 0;
+}
+
+static int edge_port_remove(struct usb_serial_port *port)
+{
+	struct edgeport_port *edge_port;
+
+	edge_port = usb_get_serial_port_data(port);
+	kfree(edge_port);
+
+	return 0;
+}
+
+module_usb_serial_driver(serial_drivers, id_table_combined);
+
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE("GPL");
+/*(DEBLOBBED)*/