Moved, renamed, and deleted files

The original directory structure was scattered and unorganized.
Changes are basically to make it look like kernel structure.

1 files changed, 1470 insertions, 0 deletions

diff --git a/drivers/usb/serial/whiteheat.c b/drivers/usb/serial/whiteheat.c
new file mode 100644
index 00000000..407e23c8
--- /dev/null
+++ b/drivers/usb/serial/whiteheat.c
@@ -0,0 +1,1470 @@
+/*
+ * USB ConnectTech WhiteHEAT driver
+ *
+ *	Copyright (C) 2002
+ *	    Connect Tech Inc.
+ *
+ *	Copyright (C) 1999 - 2001
+ *	    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.
+ *
+ * See Documentation/usb/usb-serial.txt for more information on using this
+ * driver
+ */
+
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/init.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/mutex.h>
+#include <linux/uaccess.h>
+#include <asm/termbits.h>
+#include <linux/usb.h>
+#include <linux/serial_reg.h>
+#include <linux/serial.h>
+#include <linux/usb/serial.h>
+#include <linux/firmware.h>
+#include <linux/ihex.h>
+#include "whiteheat.h"			/* WhiteHEAT specific commands */
+
+static bool debug;
+
+#ifndef CMSPAR
+#define CMSPAR 0
+#endif
+
+/*
+ * Version Information
+ */
+#define DRIVER_VERSION "v2.0"
+#define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com>, Stuart MacDonald <stuartm@connecttech.com>"
+#define DRIVER_DESC "USB ConnectTech WhiteHEAT driver"
+
+#define CONNECT_TECH_VENDOR_ID		0x0710
+#define CONNECT_TECH_FAKE_WHITE_HEAT_ID	0x0001
+#define CONNECT_TECH_WHITE_HEAT_ID	0x8001
+
+/*
+   ID tables for whiteheat are unusual, because we want to different
+   things for different versions of the device.  Eventually, this
+   will be doable from a single table.  But, for now, we define two
+   separate ID tables, and then a third table that combines them
+   just for the purpose of exporting the autoloading information.
+*/
+static const struct usb_device_id id_table_std[] = {
+	{ USB_DEVICE(CONNECT_TECH_VENDOR_ID, CONNECT_TECH_WHITE_HEAT_ID) },
+	{ }						/* Terminating entry */
+};
+
+static const struct usb_device_id id_table_prerenumeration[] = {
+	{ USB_DEVICE(CONNECT_TECH_VENDOR_ID, CONNECT_TECH_FAKE_WHITE_HEAT_ID) },
+	{ }						/* Terminating entry */
+};
+
+static const struct usb_device_id id_table_combined[] = {
+	{ USB_DEVICE(CONNECT_TECH_VENDOR_ID, CONNECT_TECH_WHITE_HEAT_ID) },
+	{ USB_DEVICE(CONNECT_TECH_VENDOR_ID, CONNECT_TECH_FAKE_WHITE_HEAT_ID) },
+	{ }						/* Terminating entry */
+};
+
+MODULE_DEVICE_TABLE(usb, id_table_combined);
+
+static struct usb_driver whiteheat_driver = {
+	.name =		"whiteheat",
+	.probe =	usb_serial_probe,
+	.disconnect =	usb_serial_disconnect,
+	.id_table =	id_table_combined,
+};
+
+/* function prototypes for the Connect Tech WhiteHEAT prerenumeration device */
+static int  whiteheat_firmware_download(struct usb_serial *serial,
+					const struct usb_device_id *id);
+static int  whiteheat_firmware_attach(struct usb_serial *serial);
+
+/* function prototypes for the Connect Tech WhiteHEAT serial converter */
+static int  whiteheat_attach(struct usb_serial *serial);
+static void whiteheat_release(struct usb_serial *serial);
+static int  whiteheat_open(struct tty_struct *tty,
+			struct usb_serial_port *port);
+static void whiteheat_close(struct usb_serial_port *port);
+static int  whiteheat_write(struct tty_struct *tty,
+			struct usb_serial_port *port,
+			const unsigned char *buf, int count);
+static int  whiteheat_write_room(struct tty_struct *tty);
+static int  whiteheat_ioctl(struct tty_struct *tty,
+			unsigned int cmd, unsigned long arg);
+static void whiteheat_set_termios(struct tty_struct *tty,
+			struct usb_serial_port *port, struct ktermios *old);
+static int  whiteheat_tiocmget(struct tty_struct *tty);
+static int  whiteheat_tiocmset(struct tty_struct *tty,
+			unsigned int set, unsigned int clear);
+static void whiteheat_break_ctl(struct tty_struct *tty, int break_state);
+static int  whiteheat_chars_in_buffer(struct tty_struct *tty);
+static void whiteheat_throttle(struct tty_struct *tty);
+static void whiteheat_unthrottle(struct tty_struct *tty);
+static void whiteheat_read_callback(struct urb *urb);
+static void whiteheat_write_callback(struct urb *urb);
+
+static struct usb_serial_driver whiteheat_fake_device = {
+	.driver = {
+		.owner =	THIS_MODULE,
+		.name =		"whiteheatnofirm",
+	},
+	.description =		"Connect Tech - WhiteHEAT - (prerenumeration)",
+	.id_table =		id_table_prerenumeration,
+	.num_ports =		1,
+	.probe =		whiteheat_firmware_download,
+	.attach =		whiteheat_firmware_attach,
+};
+
+static struct usb_serial_driver whiteheat_device = {
+	.driver = {
+		.owner =	THIS_MODULE,
+		.name =		"whiteheat",
+	},
+	.description =		"Connect Tech - WhiteHEAT",
+	.id_table =		id_table_std,
+	.num_ports =		4,
+	.attach =		whiteheat_attach,
+	.release =		whiteheat_release,
+	.open =			whiteheat_open,
+	.close =		whiteheat_close,
+	.write =		whiteheat_write,
+	.write_room =		whiteheat_write_room,
+	.ioctl =		whiteheat_ioctl,
+	.set_termios =		whiteheat_set_termios,
+	.break_ctl =		whiteheat_break_ctl,
+	.tiocmget =		whiteheat_tiocmget,
+	.tiocmset =		whiteheat_tiocmset,
+	.chars_in_buffer =	whiteheat_chars_in_buffer,
+	.throttle =		whiteheat_throttle,
+	.unthrottle =		whiteheat_unthrottle,
+	.read_bulk_callback =	whiteheat_read_callback,
+	.write_bulk_callback =	whiteheat_write_callback,
+};
+
+static struct usb_serial_driver * const serial_drivers[] = {
+	&whiteheat_fake_device, &whiteheat_device, NULL
+};
+
+struct whiteheat_command_private {
+	struct mutex		mutex;
+	__u8			port_running;
+	__u8			command_finished;
+	wait_queue_head_t	wait_command; /* for handling sleeping whilst
+						 waiting for a command to
+						 finish */
+	__u8			result_buffer[64];
+};
+
+
+#define THROTTLED		0x01
+#define ACTUALLY_THROTTLED	0x02
+
+static int urb_pool_size = 8;
+
+struct whiteheat_urb_wrap {
+	struct list_head	list;
+	struct urb		*urb;
+};
+
+struct whiteheat_private {
+	spinlock_t		lock;
+	__u8			flags;
+	__u8			mcr;		/* FIXME: no locking on mcr */
+	struct list_head	rx_urbs_free;
+	struct list_head	rx_urbs_submitted;
+	struct list_head	rx_urb_q;
+	struct work_struct	rx_work;
+	struct usb_serial_port	*port;
+	struct list_head	tx_urbs_free;
+	struct list_head	tx_urbs_submitted;
+	struct mutex		deathwarrant;
+};
+
+
+/* local function prototypes */
+static int start_command_port(struct usb_serial *serial);
+static void stop_command_port(struct usb_serial *serial);
+static void command_port_write_callback(struct urb *urb);
+static void command_port_read_callback(struct urb *urb);
+
+static int start_port_read(struct usb_serial_port *port);
+static struct whiteheat_urb_wrap *urb_to_wrap(struct urb *urb,
+						struct list_head *head);
+static struct list_head *list_first(struct list_head *head);
+static void rx_data_softint(struct work_struct *work);
+
+static int firm_send_command(struct usb_serial_port *port, __u8 command,
+						__u8 *data, __u8 datasize);
+static int firm_open(struct usb_serial_port *port);
+static int firm_close(struct usb_serial_port *port);
+static void firm_setup_port(struct tty_struct *tty);
+static int firm_set_rts(struct usb_serial_port *port, __u8 onoff);
+static int firm_set_dtr(struct usb_serial_port *port, __u8 onoff);
+static int firm_set_break(struct usb_serial_port *port, __u8 onoff);
+static int firm_purge(struct usb_serial_port *port, __u8 rxtx);
+static int firm_get_dtr_rts(struct usb_serial_port *port);
+static int firm_report_tx_done(struct usb_serial_port *port);
+
+
+#define COMMAND_PORT		4
+#define COMMAND_TIMEOUT		(2*HZ)	/* 2 second timeout for a command */
+#define	COMMAND_TIMEOUT_MS	2000
+#define CLOSING_DELAY		(30 * HZ)
+
+
+/*****************************************************************************
+ * Connect Tech's White Heat prerenumeration driver functions
+ *****************************************************************************/
+
+/* steps to download the firmware to the WhiteHEAT device:
+ - hold the reset (by writing to the reset bit of the CPUCS register)
+ - download the VEND_AX.HEX file to the chip using VENDOR_REQUEST-ANCHOR_LOAD
+ - release the reset (by writing to the CPUCS register)
+ - download the WH.HEX file for all addresses greater than 0x1b3f using
+   VENDOR_REQUEST-ANCHOR_EXTERNAL_RAM_LOAD
+ - hold the reset
+ - download the WH.HEX file for all addresses less than 0x1b40 using
+   VENDOR_REQUEST_ANCHOR_LOAD
+ - release the reset
+ - device renumerated itself and comes up as new device id with all
+   firmware download completed.
+*/
+static int whiteheat_firmware_download(struct usb_serial *serial,
+					const struct usb_device_id *id)
+{
+	int response, ret = -ENOENT;
+	const struct firmware *loader_fw = NULL, *firmware_fw = NULL;
+	const struct ihex_binrec *record;
+
+	dbg("%s", __func__);
+
+	if (request_ihex_firmware(&firmware_fw, "whiteheat.fw",
+				  &serial->dev->dev)) {
+		dev_err(&serial->dev->dev,
+			"%s - request \"whiteheat.fw\" failed\n", __func__);
+		goto out;
+	}
+	if (request_ihex_firmware(&loader_fw, "whiteheat_loader.fw",
+			     &serial->dev->dev)) {
+		dev_err(&serial->dev->dev,
+			"%s - request \"whiteheat_loader.fw\" failed\n",
+			__func__);
+		goto out;
+	}
+	ret = 0;
+	response = ezusb_set_reset (serial, 1);
+
+	record = (const struct ihex_binrec *)loader_fw->data;
+	while (record) {
+		response = ezusb_writememory (serial, be32_to_cpu(record->addr),
+					      (unsigned char *)record->data,
+					      be16_to_cpu(record->len), 0xa0);
+		if (response < 0) {
+			dev_err(&serial->dev->dev, "%s - ezusb_writememory "
+				"failed for loader (%d %04X %p %d)\n",
+				__func__, response, be32_to_cpu(record->addr),
+				record->data, be16_to_cpu(record->len));
+			break;
+		}
+		record = ihex_next_binrec(record);
+	}
+
+	response = ezusb_set_reset(serial, 0);
+
+	record = (const struct ihex_binrec *)firmware_fw->data;
+	while (record && be32_to_cpu(record->addr) < 0x1b40)
+		record = ihex_next_binrec(record);
+	while (record) {
+		response = ezusb_writememory (serial, be32_to_cpu(record->addr),
+					      (unsigned char *)record->data,
+					      be16_to_cpu(record->len), 0xa3);
+		if (response < 0) {
+			dev_err(&serial->dev->dev, "%s - ezusb_writememory "
+				"failed for first firmware step "
+				"(%d %04X %p %d)\n", __func__, response,
+				be32_to_cpu(record->addr), record->data,
+				be16_to_cpu(record->len));
+			break;
+		}
+		++record;
+	}
+
+	response = ezusb_set_reset(serial, 1);
+
+	record = (const struct ihex_binrec *)firmware_fw->data;
+	while (record && be32_to_cpu(record->addr) < 0x1b40) {
+		response = ezusb_writememory (serial, be32_to_cpu(record->addr),
+					      (unsigned char *)record->data,
+					      be16_to_cpu(record->len), 0xa0);
+		if (response < 0) {
+			dev_err(&serial->dev->dev, "%s - ezusb_writememory "
+				"failed for second firmware step "
+				"(%d %04X %p %d)\n", __func__, response,
+				be32_to_cpu(record->addr), record->data,
+				be16_to_cpu(record->len));
+			break;
+		}
+		++record;
+	}
+	ret = 0;
+	response = ezusb_set_reset (serial, 0);
+ out:
+	release_firmware(loader_fw);
+	release_firmware(firmware_fw);
+	return ret;
+}
+
+
+static int whiteheat_firmware_attach(struct usb_serial *serial)
+{
+	/* We want this device to fail to have a driver assigned to it */
+	return 1;
+}
+
+
+/*****************************************************************************
+ * Connect Tech's White Heat serial driver functions
+ *****************************************************************************/
+static int whiteheat_attach(struct usb_serial *serial)
+{
+	struct usb_serial_port *command_port;
+	struct whiteheat_command_private *command_info;
+	struct usb_serial_port *port;
+	struct whiteheat_private *info;
+	struct whiteheat_hw_info *hw_info;
+	int pipe;
+	int ret;
+	int alen;
+	__u8 *command;
+	__u8 *result;
+	int i;
+	int j;
+	struct urb *urb;
+	int buf_size;
+	struct whiteheat_urb_wrap *wrap;
+	struct list_head *tmp;
+
+	command_port = serial->port[COMMAND_PORT];
+
+	pipe = usb_sndbulkpipe(serial->dev,
+			command_port->bulk_out_endpointAddress);
+	command = kmalloc(2, GFP_KERNEL);
+	if (!command)
+		goto no_command_buffer;
+	command[0] = WHITEHEAT_GET_HW_INFO;
+	command[1] = 0;
+
+	result = kmalloc(sizeof(*hw_info) + 1, GFP_KERNEL);
+	if (!result)
+		goto no_result_buffer;
+	/*
+	 * When the module is reloaded the firmware is still there and
+	 * the endpoints are still in the usb core unchanged. This is the
+	 * unlinking bug in disguise. Same for the call below.
+	 */
+	usb_clear_halt(serial->dev, pipe);
+	ret = usb_bulk_msg(serial->dev, pipe, command, 2,
+						&alen, COMMAND_TIMEOUT_MS);
+	if (ret) {
+		dev_err(&serial->dev->dev, "%s: Couldn't send command [%d]\n",
+			serial->type->description, ret);
+		goto no_firmware;
+	} else if (alen != 2) {
+		dev_err(&serial->dev->dev, "%s: Send command incomplete [%d]\n",
+			serial->type->description, alen);
+		goto no_firmware;
+	}
+
+	pipe = usb_rcvbulkpipe(serial->dev,
+				command_port->bulk_in_endpointAddress);
+	/* See the comment on the usb_clear_halt() above */
+	usb_clear_halt(serial->dev, pipe);
+	ret = usb_bulk_msg(serial->dev, pipe, result,
+			sizeof(*hw_info) + 1, &alen, COMMAND_TIMEOUT_MS);
+	if (ret) {
+		dev_err(&serial->dev->dev, "%s: Couldn't get results [%d]\n",
+			serial->type->description, ret);
+		goto no_firmware;
+	} else if (alen != sizeof(*hw_info) + 1) {
+		dev_err(&serial->dev->dev, "%s: Get results incomplete [%d]\n",
+			serial->type->description, alen);
+		goto no_firmware;
+	} else if (result[0] != command[0]) {
+		dev_err(&serial->dev->dev, "%s: Command failed [%d]\n",
+			serial->type->description, result[0]);
+		goto no_firmware;
+	}
+
+	hw_info = (struct whiteheat_hw_info *)&result[1];
+
+	dev_info(&serial->dev->dev, "%s: Driver %s: Firmware v%d.%02d\n",
+		 serial->type->description, DRIVER_VERSION,
+		 hw_info->sw_major_rev, hw_info->sw_minor_rev);
+
+	for (i = 0; i < serial->num_ports; i++) {
+		port = serial->port[i];
+
+		info = kmalloc(sizeof(struct whiteheat_private), GFP_KERNEL);
+		if (info == NULL) {
+			dev_err(&port->dev,
+				"%s: Out of memory for port structures\n",
+				serial->type->description);
+			goto no_private;
+		}
+
+		spin_lock_init(&info->lock);
+		mutex_init(&info->deathwarrant);
+		info->flags = 0;
+		info->mcr = 0;
+		INIT_WORK(&info->rx_work, rx_data_softint);
+		info->port = port;
+
+		INIT_LIST_HEAD(&info->rx_urbs_free);
+		INIT_LIST_HEAD(&info->rx_urbs_submitted);
+		INIT_LIST_HEAD(&info->rx_urb_q);
+		INIT_LIST_HEAD(&info->tx_urbs_free);
+		INIT_LIST_HEAD(&info->tx_urbs_submitted);
+
+		for (j = 0; j < urb_pool_size; j++) {
+			urb = usb_alloc_urb(0, GFP_KERNEL);
+			if (!urb) {
+				dev_err(&port->dev, "No free urbs available\n");
+				goto no_rx_urb;
+			}
+			buf_size = port->read_urb->transfer_buffer_length;
+			urb->transfer_buffer = kmalloc(buf_size, GFP_KERNEL);
+			if (!urb->transfer_buffer) {
+				dev_err(&port->dev,
+					"Couldn't allocate urb buffer\n");
+				goto no_rx_buf;
+			}
+			wrap = kmalloc(sizeof(*wrap), GFP_KERNEL);
+			if (!wrap) {
+				dev_err(&port->dev,
+					"Couldn't allocate urb wrapper\n");
+				goto no_rx_wrap;
+			}
+			usb_fill_bulk_urb(urb, serial->dev,
+					usb_rcvbulkpipe(serial->dev,
+						port->bulk_in_endpointAddress),
+					urb->transfer_buffer, buf_size,
+					whiteheat_read_callback, port);
+			wrap->urb = urb;
+			list_add(&wrap->list, &info->rx_urbs_free);
+
+			urb = usb_alloc_urb(0, GFP_KERNEL);
+			if (!urb) {
+				dev_err(&port->dev, "No free urbs available\n");
+				goto no_tx_urb;
+			}
+			buf_size = port->write_urb->transfer_buffer_length;
+			urb->transfer_buffer = kmalloc(buf_size, GFP_KERNEL);
+			if (!urb->transfer_buffer) {
+				dev_err(&port->dev,
+					"Couldn't allocate urb buffer\n");
+				goto no_tx_buf;
+			}
+			wrap = kmalloc(sizeof(*wrap), GFP_KERNEL);
+			if (!wrap) {
+				dev_err(&port->dev,
+					"Couldn't allocate urb wrapper\n");
+				goto no_tx_wrap;
+			}
+			usb_fill_bulk_urb(urb, serial->dev,
+					usb_sndbulkpipe(serial->dev,
+						port->bulk_out_endpointAddress),
+					urb->transfer_buffer, buf_size,
+					whiteheat_write_callback, port);
+			wrap->urb = urb;
+			list_add(&wrap->list, &info->tx_urbs_free);
+		}
+
+		usb_set_serial_port_data(port, info);
+	}
+
+	command_info = kmalloc(sizeof(struct whiteheat_command_private),
+								GFP_KERNEL);
+	if (command_info == NULL) {
+		dev_err(&serial->dev->dev,
+			"%s: Out of memory for port structures\n",
+			serial->type->description);
+		goto no_command_private;
+	}
+
+	mutex_init(&command_info->mutex);
+	command_info->port_running = 0;
+	init_waitqueue_head(&command_info->wait_command);
+	usb_set_serial_port_data(command_port, command_info);
+	command_port->write_urb->complete = command_port_write_callback;
+	command_port->read_urb->complete = command_port_read_callback;
+	kfree(result);
+	kfree(command);
+
+	return 0;
+
+no_firmware:
+	/* Firmware likely not running */
+	dev_err(&serial->dev->dev,
+		"%s: Unable to retrieve firmware version, try replugging\n",
+		serial->type->description);
+	dev_err(&serial->dev->dev,
+		"%s: If the firmware is not running (status led not blinking)\n",
+		serial->type->description);
+	dev_err(&serial->dev->dev,
+		"%s: please contact support@connecttech.com\n",
+		serial->type->description);
+	kfree(result);
+	return -ENODEV;
+
+no_command_private:
+	for (i = serial->num_ports - 1; i >= 0; i--) {
+		port = serial->port[i];
+		info = usb_get_serial_port_data(port);
+		for (j = urb_pool_size - 1; j >= 0; j--) {
+			tmp = list_first(&info->tx_urbs_free);
+			list_del(tmp);
+			wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
+			urb = wrap->urb;
+			kfree(wrap);
+no_tx_wrap:
+			kfree(urb->transfer_buffer);
+no_tx_buf:
+			usb_free_urb(urb);
+no_tx_urb:
+			tmp = list_first(&info->rx_urbs_free);
+			list_del(tmp);
+			wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
+			urb = wrap->urb;
+			kfree(wrap);
+no_rx_wrap:
+			kfree(urb->transfer_buffer);
+no_rx_buf:
+			usb_free_urb(urb);
+no_rx_urb:
+			;
+		}
+		kfree(info);
+no_private:
+		;
+	}
+	kfree(result);
+no_result_buffer:
+	kfree(command);
+no_command_buffer:
+	return -ENOMEM;
+}
+
+
+static void whiteheat_release(struct usb_serial *serial)
+{
+	struct usb_serial_port *command_port;
+	struct usb_serial_port *port;
+	struct whiteheat_private *info;
+	struct whiteheat_urb_wrap *wrap;
+	struct urb *urb;
+	struct list_head *tmp;
+	struct list_head *tmp2;
+	int i;
+
+	dbg("%s", __func__);
+
+	/* free up our private data for our command port */
+	command_port = serial->port[COMMAND_PORT];
+	kfree(usb_get_serial_port_data(command_port));
+
+	for (i = 0; i < serial->num_ports; i++) {
+		port = serial->port[i];
+		info = usb_get_serial_port_data(port);
+		list_for_each_safe(tmp, tmp2, &info->rx_urbs_free) {
+			list_del(tmp);
+			wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
+			urb = wrap->urb;
+			kfree(wrap);
+			kfree(urb->transfer_buffer);
+			usb_free_urb(urb);
+		}
+		list_for_each_safe(tmp, tmp2, &info->tx_urbs_free) {
+			list_del(tmp);
+			wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
+			urb = wrap->urb;
+			kfree(wrap);
+			kfree(urb->transfer_buffer);
+			usb_free_urb(urb);
+		}
+		kfree(info);
+	}
+}
+
+static int whiteheat_open(struct tty_struct *tty, struct usb_serial_port *port)
+{
+	int		retval = 0;
+
+	dbg("%s - port %d", __func__, port->number);
+
+	retval = start_command_port(port->serial);
+	if (retval)
+		goto exit;
+
+	if (tty)
+		tty->low_latency = 1;
+
+	/* send an open port command */
+	retval = firm_open(port);
+	if (retval) {
+		stop_command_port(port->serial);
+		goto exit;
+	}
+
+	retval = firm_purge(port, WHITEHEAT_PURGE_RX | WHITEHEAT_PURGE_TX);
+	if (retval) {
+		firm_close(port);
+		stop_command_port(port->serial);
+		goto exit;
+	}
+
+	if (tty)
+		firm_setup_port(tty);
+
+	/* Work around HCD bugs */
+	usb_clear_halt(port->serial->dev, port->read_urb->pipe);
+	usb_clear_halt(port->serial->dev, port->write_urb->pipe);
+
+	/* Start reading from the device */
+	retval = start_port_read(port);
+	if (retval) {
+		dev_err(&port->dev,
+			"%s - failed submitting read urb, error %d\n",
+			__func__, retval);
+		firm_close(port);
+		stop_command_port(port->serial);
+		goto exit;
+	}
+
+exit:
+	dbg("%s - exit, retval = %d", __func__, retval);
+	return retval;
+}
+
+
+static void whiteheat_close(struct usb_serial_port *port)
+{
+	struct whiteheat_private *info = usb_get_serial_port_data(port);
+	struct whiteheat_urb_wrap *wrap;
+	struct urb *urb;
+	struct list_head *tmp;
+	struct list_head *tmp2;
+
+	dbg("%s - port %d", __func__, port->number);
+
+	firm_report_tx_done(port);
+	firm_close(port);
+
+	/* shutdown our bulk reads and writes */
+	mutex_lock(&info->deathwarrant);
+	spin_lock_irq(&info->lock);
+	list_for_each_safe(tmp, tmp2, &info->rx_urbs_submitted) {
+		wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
+		urb = wrap->urb;
+		list_del(tmp);
+		spin_unlock_irq(&info->lock);
+		usb_kill_urb(urb);
+		spin_lock_irq(&info->lock);
+		list_add(tmp, &info->rx_urbs_free);
+	}
+	list_for_each_safe(tmp, tmp2, &info->rx_urb_q)
+		list_move(tmp, &info->rx_urbs_free);
+	list_for_each_safe(tmp, tmp2, &info->tx_urbs_submitted) {
+		wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
+		urb = wrap->urb;
+		list_del(tmp);
+		spin_unlock_irq(&info->lock);
+		usb_kill_urb(urb);
+		spin_lock_irq(&info->lock);
+		list_add(tmp, &info->tx_urbs_free);
+	}
+	spin_unlock_irq(&info->lock);
+	mutex_unlock(&info->deathwarrant);
+	stop_command_port(port->serial);
+}
+
+
+static int whiteheat_write(struct tty_struct *tty,
+	struct usb_serial_port *port, const unsigned char *buf, int count)
+{
+	struct whiteheat_private *info = usb_get_serial_port_data(port);
+	struct whiteheat_urb_wrap *wrap;
+	struct urb *urb;
+	int result;
+	int bytes;
+	int sent = 0;
+	unsigned long flags;
+	struct list_head *tmp;
+
+	dbg("%s - port %d", __func__, port->number);
+
+	if (count == 0) {
+		dbg("%s - write request of 0 bytes", __func__);
+		return (0);
+	}
+
+	while (count) {
+		spin_lock_irqsave(&info->lock, flags);
+		if (list_empty(&info->tx_urbs_free)) {
+			spin_unlock_irqrestore(&info->lock, flags);
+			break;
+		}
+		tmp = list_first(&info->tx_urbs_free);
+		list_del(tmp);
+		spin_unlock_irqrestore(&info->lock, flags);
+
+		wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
+		urb = wrap->urb;
+		bytes = (count > port->bulk_out_size) ?
+					port->bulk_out_size : count;
+		memcpy(urb->transfer_buffer, buf + sent, bytes);
+
+		usb_serial_debug_data(debug, &port->dev,
+				__func__, bytes, urb->transfer_buffer);
+
+		urb->transfer_buffer_length = bytes;
+		result = usb_submit_urb(urb, GFP_ATOMIC);
+		if (result) {
+			dev_err_console(port,
+				"%s - failed submitting write urb, error %d\n",
+				__func__, result);
+			sent = result;
+			spin_lock_irqsave(&info->lock, flags);
+			list_add(tmp, &info->tx_urbs_free);
+			spin_unlock_irqrestore(&info->lock, flags);
+			break;
+		} else {
+			sent += bytes;
+			count -= bytes;
+			spin_lock_irqsave(&info->lock, flags);
+			list_add(tmp, &info->tx_urbs_submitted);
+			spin_unlock_irqrestore(&info->lock, flags);
+		}
+	}
+
+	return sent;
+}
+
+static int whiteheat_write_room(struct tty_struct *tty)
+{
+	struct usb_serial_port *port = tty->driver_data;
+	struct whiteheat_private *info = usb_get_serial_port_data(port);
+	struct list_head *tmp;
+	int room = 0;
+	unsigned long flags;
+
+	dbg("%s - port %d", __func__, port->number);
+
+	spin_lock_irqsave(&info->lock, flags);
+	list_for_each(tmp, &info->tx_urbs_free)
+		room++;
+	spin_unlock_irqrestore(&info->lock, flags);
+	room *= port->bulk_out_size;
+
+	dbg("%s - returns %d", __func__, room);
+	return (room);
+}
+
+static int whiteheat_tiocmget(struct tty_struct *tty)
+{
+	struct usb_serial_port *port = tty->driver_data;
+	struct whiteheat_private *info = usb_get_serial_port_data(port);
+	unsigned int modem_signals = 0;
+
+	dbg("%s - port %d", __func__, port->number);
+
+	firm_get_dtr_rts(port);
+	if (info->mcr & UART_MCR_DTR)
+		modem_signals |= TIOCM_DTR;
+	if (info->mcr & UART_MCR_RTS)
+		modem_signals |= TIOCM_RTS;
+
+	return modem_signals;
+}
+
+static int whiteheat_tiocmset(struct tty_struct *tty,
+			       unsigned int set, unsigned int clear)
+{
+	struct usb_serial_port *port = tty->driver_data;
+	struct whiteheat_private *info = usb_get_serial_port_data(port);
+
+	dbg("%s - port %d", __func__, port->number);
+
+	if (set & TIOCM_RTS)
+		info->mcr |= UART_MCR_RTS;
+	if (set & TIOCM_DTR)
+		info->mcr |= UART_MCR_DTR;
+
+	if (clear & TIOCM_RTS)
+		info->mcr &= ~UART_MCR_RTS;
+	if (clear & TIOCM_DTR)
+		info->mcr &= ~UART_MCR_DTR;
+
+	firm_set_dtr(port, info->mcr & UART_MCR_DTR);
+	firm_set_rts(port, info->mcr & UART_MCR_RTS);
+	return 0;
+}
+
+
+static int whiteheat_ioctl(struct tty_struct *tty,
+					unsigned int cmd, unsigned long arg)
+{
+	struct usb_serial_port *port = tty->driver_data;
+	struct serial_struct serstruct;
+	void __user *user_arg = (void __user *)arg;
+
+	dbg("%s - port %d, cmd 0x%.4x", __func__, port->number, cmd);
+
+	switch (cmd) {
+	case TIOCGSERIAL:
+		memset(&serstruct, 0, sizeof(serstruct));
+		serstruct.type = PORT_16654;
+		serstruct.line = port->serial->minor;
+		serstruct.port = port->number;
+		serstruct.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
+		serstruct.xmit_fifo_size = port->bulk_out_size;
+		serstruct.custom_divisor = 0;
+		serstruct.baud_base = 460800;
+		serstruct.close_delay = CLOSING_DELAY;
+		serstruct.closing_wait = CLOSING_DELAY;
+
+		if (copy_to_user(user_arg, &serstruct, sizeof(serstruct)))
+			return -EFAULT;
+		break;
+	default:
+		break;
+	}
+
+	return -ENOIOCTLCMD;
+}
+
+
+static void whiteheat_set_termios(struct tty_struct *tty,
+	struct usb_serial_port *port, struct ktermios *old_termios)
+{
+	firm_setup_port(tty);
+}
+
+static void whiteheat_break_ctl(struct tty_struct *tty, int break_state)
+{
+	struct usb_serial_port *port = tty->driver_data;
+	firm_set_break(port, break_state);
+}
+
+
+static int whiteheat_chars_in_buffer(struct tty_struct *tty)
+{
+	struct usb_serial_port *port = tty->driver_data;
+	struct whiteheat_private *info = usb_get_serial_port_data(port);
+	struct list_head *tmp;
+	struct whiteheat_urb_wrap *wrap;
+	int chars = 0;
+	unsigned long flags;
+
+	dbg("%s - port %d", __func__, port->number);
+
+	spin_lock_irqsave(&info->lock, flags);
+	list_for_each(tmp, &info->tx_urbs_submitted) {
+		wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
+		chars += wrap->urb->transfer_buffer_length;
+	}
+	spin_unlock_irqrestore(&info->lock, flags);
+
+	dbg("%s - returns %d", __func__, chars);
+	return chars;
+}
+
+
+static void whiteheat_throttle(struct tty_struct *tty)
+{
+	struct usb_serial_port *port = tty->driver_data;
+	struct whiteheat_private *info = usb_get_serial_port_data(port);
+
+	dbg("%s - port %d", __func__, port->number);
+
+	spin_lock_irq(&info->lock);
+	info->flags |= THROTTLED;
+	spin_unlock_irq(&info->lock);
+}
+
+
+static void whiteheat_unthrottle(struct tty_struct *tty)
+{
+	struct usb_serial_port *port = tty->driver_data;
+	struct whiteheat_private *info = usb_get_serial_port_data(port);
+	int actually_throttled;
+
+	dbg("%s - port %d", __func__, port->number);
+
+	spin_lock_irq(&info->lock);
+	actually_throttled = info->flags & ACTUALLY_THROTTLED;
+	info->flags &= ~(THROTTLED | ACTUALLY_THROTTLED);
+	spin_unlock_irq(&info->lock);
+
+	if (actually_throttled)
+		rx_data_softint(&info->rx_work);
+}
+
+
+/*****************************************************************************
+ * Connect Tech's White Heat callback routines
+ *****************************************************************************/
+static void command_port_write_callback(struct urb *urb)
+{
+	int status = urb->status;
+
+	dbg("%s", __func__);
+
+	if (status) {
+		dbg("nonzero urb status: %d", status);
+		return;
+	}
+}
+
+
+static void command_port_read_callback(struct urb *urb)
+{
+	struct usb_serial_port *command_port = urb->context;
+	struct whiteheat_command_private *command_info;
+	int status = urb->status;
+	unsigned char *data = urb->transfer_buffer;
+	int result;
+
+	dbg("%s", __func__);
+
+	command_info = usb_get_serial_port_data(command_port);
+	if (!command_info) {
+		dbg("%s - command_info is NULL, exiting.", __func__);
+		return;
+	}
+	if (status) {
+		dbg("%s - nonzero urb status: %d", __func__, status);
+		if (status != -ENOENT)
+			command_info->command_finished = WHITEHEAT_CMD_FAILURE;
+		wake_up(&command_info->wait_command);
+		return;
+	}
+
+	usb_serial_debug_data(debug, &command_port->dev,
+				__func__, urb->actual_length, data);
+
+	if (data[0] == WHITEHEAT_CMD_COMPLETE) {
+		command_info->command_finished = WHITEHEAT_CMD_COMPLETE;
+		wake_up(&command_info->wait_command);
+	} else if (data[0] == WHITEHEAT_CMD_FAILURE) {
+		command_info->command_finished = WHITEHEAT_CMD_FAILURE;
+		wake_up(&command_info->wait_command);
+	} else if (data[0] == WHITEHEAT_EVENT) {
+		/* These are unsolicited reports from the firmware, hence no
+		   waiting command to wakeup */
+		dbg("%s - event received", __func__);
+	} else if (data[0] == WHITEHEAT_GET_DTR_RTS) {
+		memcpy(command_info->result_buffer, &data[1],
+						urb->actual_length - 1);
+		command_info->command_finished = WHITEHEAT_CMD_COMPLETE;
+		wake_up(&command_info->wait_command);
+	} else
+		dbg("%s - bad reply from firmware", __func__);
+
+	/* Continue trying to always read */
+	result = usb_submit_urb(command_port->read_urb, GFP_ATOMIC);
+	if (result)
+		dbg("%s - failed resubmitting read urb, error %d",
+			__func__, result);
+}
+
+
+static void whiteheat_read_callback(struct urb *urb)
+{
+	struct usb_serial_port *port = urb->context;
+	struct whiteheat_urb_wrap *wrap;
+	unsigned char *data = urb->transfer_buffer;
+	struct whiteheat_private *info = usb_get_serial_port_data(port);
+	int status = urb->status;
+
+	dbg("%s - port %d", __func__, port->number);
+
+	spin_lock(&info->lock);
+	wrap = urb_to_wrap(urb, &info->rx_urbs_submitted);
+	if (!wrap) {
+		spin_unlock(&info->lock);
+		dev_err(&port->dev, "%s - Not my urb!\n", __func__);
+		return;
+	}
+	list_del(&wrap->list);
+	spin_unlock(&info->lock);
+
+	if (status) {
+		dbg("%s - nonzero read bulk status received: %d",
+		    __func__, status);
+		spin_lock(&info->lock);
+		list_add(&wrap->list, &info->rx_urbs_free);
+		spin_unlock(&info->lock);
+		return;
+	}
+
+	usb_serial_debug_data(debug, &port->dev,
+				__func__, urb->actual_length, data);
+
+	spin_lock(&info->lock);
+	list_add_tail(&wrap->list, &info->rx_urb_q);
+	if (info->flags & THROTTLED) {
+		info->flags |= ACTUALLY_THROTTLED;
+		spin_unlock(&info->lock);
+		return;
+	}
+	spin_unlock(&info->lock);
+
+	schedule_work(&info->rx_work);
+}
+
+
+static void whiteheat_write_callback(struct urb *urb)
+{
+	struct usb_serial_port *port = urb->context;
+	struct whiteheat_private *info = usb_get_serial_port_data(port);
+	struct whiteheat_urb_wrap *wrap;
+	int status = urb->status;
+
+	dbg("%s - port %d", __func__, port->number);
+
+	spin_lock(&info->lock);
+	wrap = urb_to_wrap(urb, &info->tx_urbs_submitted);
+	if (!wrap) {
+		spin_unlock(&info->lock);
+		dev_err(&port->dev, "%s - Not my urb!\n", __func__);
+		return;
+	}
+	list_move(&wrap->list, &info->tx_urbs_free);
+	spin_unlock(&info->lock);
+
+	if (status) {
+		dbg("%s - nonzero write bulk status received: %d",
+		    __func__, status);
+		return;
+	}
+
+	usb_serial_port_softint(port);
+}
+
+
+/*****************************************************************************
+ * Connect Tech's White Heat firmware interface
+ *****************************************************************************/
+static int firm_send_command(struct usb_serial_port *port, __u8 command,
+						__u8 *data, __u8 datasize)
+{
+	struct usb_serial_port *command_port;
+	struct whiteheat_command_private *command_info;
+	struct whiteheat_private *info;
+	__u8 *transfer_buffer;
+	int retval = 0;
+	int t;
+
+	dbg("%s - command %d", __func__, command);
+
+	command_port = port->serial->port[COMMAND_PORT];
+	command_info = usb_get_serial_port_data(command_port);
+	mutex_lock(&command_info->mutex);
+	command_info->command_finished = false;
+
+	transfer_buffer = (__u8 *)command_port->write_urb->transfer_buffer;
+	transfer_buffer[0] = command;
+	memcpy(&transfer_buffer[1], data, datasize);
+	command_port->write_urb->transfer_buffer_length = datasize + 1;
+	retval = usb_submit_urb(command_port->write_urb, GFP_NOIO);
+	if (retval) {
+		dbg("%s - submit urb failed", __func__);
+		goto exit;
+	}
+
+	/* wait for the command to complete */
+	t = wait_event_timeout(command_info->wait_command,
+		(bool)command_info->command_finished, COMMAND_TIMEOUT);
+	if (!t)
+		usb_kill_urb(command_port->write_urb);
+
+	if (command_info->command_finished == false) {
+		dbg("%s - command timed out.", __func__);
+		retval = -ETIMEDOUT;
+		goto exit;
+	}
+
+	if (command_info->command_finished == WHITEHEAT_CMD_FAILURE) {
+		dbg("%s - command failed.", __func__);
+		retval = -EIO;
+		goto exit;
+	}
+
+	if (command_info->command_finished == WHITEHEAT_CMD_COMPLETE) {
+		dbg("%s - command completed.", __func__);
+		switch (command) {
+		case WHITEHEAT_GET_DTR_RTS:
+			info = usb_get_serial_port_data(port);
+			memcpy(&info->mcr, command_info->result_buffer,
+					sizeof(struct whiteheat_dr_info));
+				break;
+		}
+	}
+exit:
+	mutex_unlock(&command_info->mutex);
+	return retval;
+}
+
+
+static int firm_open(struct usb_serial_port *port)
+{
+	struct whiteheat_simple open_command;
+
+	open_command.port = port->number - port->serial->minor + 1;
+	return firm_send_command(port, WHITEHEAT_OPEN,
+		(__u8 *)&open_command, sizeof(open_command));
+}
+
+
+static int firm_close(struct usb_serial_port *port)
+{
+	struct whiteheat_simple close_command;
+
+	close_command.port = port->number - port->serial->minor + 1;
+	return firm_send_command(port, WHITEHEAT_CLOSE,
+			(__u8 *)&close_command, sizeof(close_command));
+}
+
+
+static void firm_setup_port(struct tty_struct *tty)
+{
+	struct usb_serial_port *port = tty->driver_data;
+	struct whiteheat_port_settings port_settings;
+	unsigned int cflag = tty->termios->c_cflag;
+
+	port_settings.port = port->number + 1;
+
+	/* get the byte size */
+	switch (cflag & CSIZE) {
+	case CS5:	port_settings.bits = 5;   break;
+	case CS6:	port_settings.bits = 6;   break;
+	case CS7:	port_settings.bits = 7;   break;
+	default:
+	case CS8:	port_settings.bits = 8;   break;
+	}
+	dbg("%s - data bits = %d", __func__, port_settings.bits);
+
+	/* determine the parity */
+	if (cflag & PARENB)
+		if (cflag & CMSPAR)
+			if (cflag & PARODD)
+				port_settings.parity = WHITEHEAT_PAR_MARK;
+			else
+				port_settings.parity = WHITEHEAT_PAR_SPACE;
+		else
+			if (cflag & PARODD)
+				port_settings.parity = WHITEHEAT_PAR_ODD;
+			else
+				port_settings.parity = WHITEHEAT_PAR_EVEN;
+	else
+		port_settings.parity = WHITEHEAT_PAR_NONE;
+	dbg("%s - parity = %c", __func__, port_settings.parity);
+
+	/* figure out the stop bits requested */
+	if (cflag & CSTOPB)
+		port_settings.stop = 2;
+	else
+		port_settings.stop = 1;
+	dbg("%s - stop bits = %d", __func__, port_settings.stop);
+
+	/* figure out the flow control settings */
+	if (cflag & CRTSCTS)
+		port_settings.hflow = (WHITEHEAT_HFLOW_CTS |
+						WHITEHEAT_HFLOW_RTS);
+	else
+		port_settings.hflow = WHITEHEAT_HFLOW_NONE;
+	dbg("%s - hardware flow control = %s %s %s %s", __func__,
+	    (port_settings.hflow & WHITEHEAT_HFLOW_CTS) ? "CTS" : "",
+	    (port_settings.hflow & WHITEHEAT_HFLOW_RTS) ? "RTS" : "",
+	    (port_settings.hflow & WHITEHEAT_HFLOW_DSR) ? "DSR" : "",
+	    (port_settings.hflow & WHITEHEAT_HFLOW_DTR) ? "DTR" : "");
+
+	/* determine software flow control */
+	if (I_IXOFF(tty))
+		port_settings.sflow = WHITEHEAT_SFLOW_RXTX;
+	else
+		port_settings.sflow = WHITEHEAT_SFLOW_NONE;
+	dbg("%s - software flow control = %c", __func__, port_settings.sflow);
+
+	port_settings.xon = START_CHAR(tty);
+	port_settings.xoff = STOP_CHAR(tty);
+	dbg("%s - XON = %2x, XOFF = %2x",
+			__func__, port_settings.xon, port_settings.xoff);
+
+	/* get the baud rate wanted */
+	port_settings.baud = tty_get_baud_rate(tty);
+	dbg("%s - baud rate = %d", __func__, port_settings.baud);
+
+	/* fixme: should set validated settings */
+	tty_encode_baud_rate(tty, port_settings.baud, port_settings.baud);
+	/* handle any settings that aren't specified in the tty structure */
+	port_settings.lloop = 0;
+
+	/* now send the message to the device */
+	firm_send_command(port, WHITEHEAT_SETUP_PORT,
+			(__u8 *)&port_settings, sizeof(port_settings));
+}
+
+
+static int firm_set_rts(struct usb_serial_port *port, __u8 onoff)
+{
+	struct whiteheat_set_rdb rts_command;
+
+	rts_command.port = port->number - port->serial->minor + 1;
+	rts_command.state = onoff;
+	return firm_send_command(port, WHITEHEAT_SET_RTS,
+			(__u8 *)&rts_command, sizeof(rts_command));
+}
+
+
+static int firm_set_dtr(struct usb_serial_port *port, __u8 onoff)
+{
+	struct whiteheat_set_rdb dtr_command;
+
+	dtr_command.port = port->number - port->serial->minor + 1;
+	dtr_command.state = onoff;
+	return firm_send_command(port, WHITEHEAT_SET_DTR,
+			(__u8 *)&dtr_command, sizeof(dtr_command));
+}
+
+
+static int firm_set_break(struct usb_serial_port *port, __u8 onoff)
+{
+	struct whiteheat_set_rdb break_command;
+
+	break_command.port = port->number - port->serial->minor + 1;
+	break_command.state = onoff;
+	return firm_send_command(port, WHITEHEAT_SET_BREAK,
+			(__u8 *)&break_command, sizeof(break_command));
+}
+
+
+static int firm_purge(struct usb_serial_port *port, __u8 rxtx)
+{
+	struct whiteheat_purge purge_command;
+
+	purge_command.port = port->number - port->serial->minor + 1;
+	purge_command.what = rxtx;
+	return firm_send_command(port, WHITEHEAT_PURGE,
+			(__u8 *)&purge_command, sizeof(purge_command));
+}
+
+
+static int firm_get_dtr_rts(struct usb_serial_port *port)
+{
+	struct whiteheat_simple get_dr_command;
+
+	get_dr_command.port = port->number - port->serial->minor + 1;
+	return firm_send_command(port, WHITEHEAT_GET_DTR_RTS,
+			(__u8 *)&get_dr_command, sizeof(get_dr_command));
+}
+
+
+static int firm_report_tx_done(struct usb_serial_port *port)
+{
+	struct whiteheat_simple close_command;
+
+	close_command.port = port->number - port->serial->minor + 1;
+	return firm_send_command(port, WHITEHEAT_REPORT_TX_DONE,
+			(__u8 *)&close_command, sizeof(close_command));
+}
+
+
+/*****************************************************************************
+ * Connect Tech's White Heat utility functions
+ *****************************************************************************/
+static int start_command_port(struct usb_serial *serial)
+{
+	struct usb_serial_port *command_port;
+	struct whiteheat_command_private *command_info;
+	int retval = 0;
+
+	command_port = serial->port[COMMAND_PORT];
+	command_info = usb_get_serial_port_data(command_port);
+	mutex_lock(&command_info->mutex);
+	if (!command_info->port_running) {
+		/* Work around HCD bugs */
+		usb_clear_halt(serial->dev, command_port->read_urb->pipe);
+
+		retval = usb_submit_urb(command_port->read_urb, GFP_KERNEL);
+		if (retval) {
+			dev_err(&serial->dev->dev,
+				"%s - failed submitting read urb, error %d\n",
+				__func__, retval);
+			goto exit;
+		}
+	}
+	command_info->port_running++;
+
+exit:
+	mutex_unlock(&command_info->mutex);
+	return retval;
+}
+
+
+static void stop_command_port(struct usb_serial *serial)
+{
+	struct usb_serial_port *command_port;
+	struct whiteheat_command_private *command_info;
+
+	command_port = serial->port[COMMAND_PORT];
+	command_info = usb_get_serial_port_data(command_port);
+	mutex_lock(&command_info->mutex);
+	command_info->port_running--;
+	if (!command_info->port_running)
+		usb_kill_urb(command_port->read_urb);
+	mutex_unlock(&command_info->mutex);
+}
+
+
+static int start_port_read(struct usb_serial_port *port)
+{
+	struct whiteheat_private *info = usb_get_serial_port_data(port);
+	struct whiteheat_urb_wrap *wrap;
+	struct urb *urb;
+	int retval = 0;
+	unsigned long flags;
+	struct list_head *tmp;
+	struct list_head *tmp2;
+
+	spin_lock_irqsave(&info->lock, flags);
+
+	list_for_each_safe(tmp, tmp2, &info->rx_urbs_free) {
+		list_del(tmp);
+		wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
+		urb = wrap->urb;
+		spin_unlock_irqrestore(&info->lock, flags);
+		retval = usb_submit_urb(urb, GFP_KERNEL);
+		if (retval) {
+			spin_lock_irqsave(&info->lock, flags);
+			list_add(tmp, &info->rx_urbs_free);
+			list_for_each_safe(tmp, tmp2, &info->rx_urbs_submitted) {
+				wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
+				urb = wrap->urb;
+				list_del(tmp);
+				spin_unlock_irqrestore(&info->lock, flags);
+				usb_kill_urb(urb);
+				spin_lock_irqsave(&info->lock, flags);
+				list_add(tmp, &info->rx_urbs_free);
+			}
+			break;
+		}
+		spin_lock_irqsave(&info->lock, flags);
+		list_add(tmp, &info->rx_urbs_submitted);
+	}
+
+	spin_unlock_irqrestore(&info->lock, flags);
+
+	return retval;
+}
+
+
+static struct whiteheat_urb_wrap *urb_to_wrap(struct urb *urb,
+						struct list_head *head)
+{
+	struct whiteheat_urb_wrap *wrap;
+	struct list_head *tmp;
+
+	list_for_each(tmp, head) {
+		wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
+		if (wrap->urb == urb)
+			return wrap;
+	}
+
+	return NULL;
+}
+
+
+static struct list_head *list_first(struct list_head *head)
+{
+	return head->next;
+}
+
+
+static void rx_data_softint(struct work_struct *work)
+{
+	struct whiteheat_private *info =
+		container_of(work, struct whiteheat_private, rx_work);
+	struct usb_serial_port *port = info->port;
+	struct tty_struct *tty = tty_port_tty_get(&port->port);
+	struct whiteheat_urb_wrap *wrap;
+	struct urb *urb;
+	unsigned long flags;
+	struct list_head *tmp;
+	struct list_head *tmp2;
+	int result;
+	int sent = 0;
+
+	spin_lock_irqsave(&info->lock, flags);
+	if (info->flags & THROTTLED) {
+		spin_unlock_irqrestore(&info->lock, flags);
+		goto out;
+	}
+
+	list_for_each_safe(tmp, tmp2, &info->rx_urb_q) {
+		list_del(tmp);
+		spin_unlock_irqrestore(&info->lock, flags);
+
+		wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
+		urb = wrap->urb;
+
+		if (tty && urb->actual_length)
+			sent += tty_insert_flip_string(tty,
+				urb->transfer_buffer, urb->actual_length);
+
+		result = usb_submit_urb(urb, GFP_ATOMIC);
+		if (result) {
+			dev_err(&port->dev,
+				"%s - failed resubmitting read urb, error %d\n",
+				__func__, result);
+			spin_lock_irqsave(&info->lock, flags);
+			list_add(tmp, &info->rx_urbs_free);
+			continue;
+		}
+
+		spin_lock_irqsave(&info->lock, flags);
+		list_add(tmp, &info->rx_urbs_submitted);
+	}
+	spin_unlock_irqrestore(&info->lock, flags);
+
+	if (sent)
+		tty_flip_buffer_push(tty);
+out:
+	tty_kref_put(tty);
+}
+
+module_usb_serial_driver(whiteheat_driver, serial_drivers);
+
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE("GPL");
+
+MODULE_FIRMWARE("whiteheat.fw");
+MODULE_FIRMWARE("whiteheat_loader.fw");
+
+module_param(urb_pool_size, int, 0);
+MODULE_PARM_DESC(urb_pool_size, "Number of urbs to use for buffering");
+
+module_param(debug, bool, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(debug, "Debug enabled or not");