Adding upstream version 5.10.209.upstream/5.10.209

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 832 insertions, 0 deletions

diff --git a/drivers/usb/serial/whiteheat.c b/drivers/usb/serial/whiteheat.c
new file mode 100644
index 000000000..5576cfa50
--- /dev/null
+++ b/drivers/usb/serial/whiteheat.c
@@ -0,0 +1,832 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * USB ConnectTech WhiteHEAT driver
+ *
+ *	Copyright (C) 2002
+ *	    Connect Tech Inc.
+ *
+ *	Copyright (C) 1999 - 2001
+ *	    Greg Kroah-Hartman (greg@kroah.com)
+ *
+ * See Documentation/usb/usb-serial.rst for more information on using this
+ * driver
+ */
+
+#include <linux/kernel.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/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/usb/ezusb.h>
+#include "whiteheat.h"			/* WhiteHEAT specific commands */
+
+#ifndef CMSPAR
+#define CMSPAR 0
+#endif
+
+/*
+ * Version Information
+ */
+#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);
+
+
+/* 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_port_probe(struct usb_serial_port *port);
+static int  whiteheat_port_remove(struct usb_serial_port *port);
+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_get_serial(struct tty_struct *tty,
+			struct serial_struct *ss);
+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 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,
+	.num_bulk_in =		5,
+	.num_bulk_out =		5,
+	.attach =		whiteheat_attach,
+	.release =		whiteheat_release,
+	.port_probe =		whiteheat_port_probe,
+	.port_remove =		whiteheat_port_remove,
+	.open =			whiteheat_open,
+	.close =		whiteheat_close,
+	.get_serial =		whiteheat_get_serial,
+	.set_termios =		whiteheat_set_termios,
+	.break_ctl =		whiteheat_break_ctl,
+	.tiocmget =		whiteheat_tiocmget,
+	.tiocmset =		whiteheat_tiocmset,
+	.throttle =		usb_serial_generic_throttle,
+	.unthrottle =		usb_serial_generic_unthrottle,
+};
+
+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];
+};
+
+struct whiteheat_private {
+	__u8			mcr;		/* FIXME: no locking on mcr */
+};
+
+
+/* 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 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;
+
+	response = ezusb_fx1_ihex_firmware_download(serial->dev, "whiteheat_loader.fw");
+	if (response >= 0) {
+		response = ezusb_fx1_ihex_firmware_download(serial->dev, "whiteheat.fw");
+		if (response >= 0)
+			return 0;
+	}
+	return -ENOENT;
+}
+
+
+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 whiteheat_hw_info *hw_info;
+	int pipe;
+	int ret;
+	int alen;
+	__u8 *command;
+	__u8 *result;
+
+	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: Firmware v%d.%02d\n",
+		 serial->type->description,
+		 hw_info->sw_major_rev, hw_info->sw_minor_rev);
+
+	command_info = kmalloc(sizeof(struct whiteheat_command_private),
+								GFP_KERNEL);
+	if (!command_info)
+		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);
+	kfree(command);
+	return -ENODEV;
+
+no_command_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;
+
+	/* free up our private data for our command port */
+	command_port = serial->port[COMMAND_PORT];
+	kfree(usb_get_serial_port_data(command_port));
+}
+
+static int whiteheat_port_probe(struct usb_serial_port *port)
+{
+	struct whiteheat_private *info;
+
+	info = kzalloc(sizeof(*info), GFP_KERNEL);
+	if (!info)
+		return -ENOMEM;
+
+	usb_set_serial_port_data(port, info);
+
+	return 0;
+}
+
+static int whiteheat_port_remove(struct usb_serial_port *port)
+{
+	struct whiteheat_private *info;
+
+	info = usb_get_serial_port_data(port);
+	kfree(info);
+
+	return 0;
+}
+
+static int whiteheat_open(struct tty_struct *tty, struct usb_serial_port *port)
+{
+	int retval;
+
+	retval = start_command_port(port->serial);
+	if (retval)
+		goto exit;
+
+	/* 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);
+
+	retval = usb_serial_generic_open(tty, port);
+	if (retval) {
+		firm_close(port);
+		stop_command_port(port->serial);
+		goto exit;
+	}
+exit:
+	return retval;
+}
+
+
+static void whiteheat_close(struct usb_serial_port *port)
+{
+	firm_report_tx_done(port);
+	firm_close(port);
+
+	usb_serial_generic_close(port);
+
+	stop_command_port(port->serial);
+}
+
+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;
+
+	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);
+
+	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_get_serial(struct tty_struct *tty,
+				struct serial_struct *ss)
+{
+	struct usb_serial_port *port = tty->driver_data;
+
+	ss->type = PORT_16654;
+	ss->line = port->minor;
+	ss->port = port->port_number;
+	ss->xmit_fifo_size = kfifo_size(&port->write_fifo);
+	ss->custom_divisor = 0;
+	ss->baud_base = 460800;
+	ss->close_delay = CLOSING_DELAY;
+	ss->closing_wait = CLOSING_DELAY;
+
+	return 0;
+}
+
+
+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);
+}
+
+
+/*****************************************************************************
+ * Connect Tech's White Heat callback routines
+ *****************************************************************************/
+static void command_port_write_callback(struct urb *urb)
+{
+	int status = urb->status;
+
+	if (status) {
+		dev_dbg(&urb->dev->dev, "nonzero urb status: %d\n", 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;
+
+	command_info = usb_get_serial_port_data(command_port);
+	if (!command_info) {
+		dev_dbg(&urb->dev->dev, "%s - command_info is NULL, exiting.\n", __func__);
+		return;
+	}
+	if (!urb->actual_length) {
+		dev_dbg(&urb->dev->dev, "%s - empty response, exiting.\n", __func__);
+		return;
+	}
+	if (status) {
+		dev_dbg(&urb->dev->dev, "%s - nonzero urb status: %d\n", __func__, status);
+		if (status != -ENOENT)
+			command_info->command_finished = WHITEHEAT_CMD_FAILURE;
+		wake_up(&command_info->wait_command);
+		return;
+	}
+
+	usb_serial_debug_data(&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 */
+		dev_dbg(&urb->dev->dev, "%s - event received\n", __func__);
+	} else if ((data[0] == WHITEHEAT_GET_DTR_RTS) &&
+		(urb->actual_length - 1 <= sizeof(command_info->result_buffer))) {
+		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
+		dev_dbg(&urb->dev->dev, "%s - bad reply from firmware\n", __func__);
+
+	/* Continue trying to always read */
+	result = usb_submit_urb(command_port->read_urb, GFP_ATOMIC);
+	if (result)
+		dev_dbg(&urb->dev->dev, "%s - failed resubmitting read urb, error %d\n",
+			__func__, result);
+}
+
+
+/*****************************************************************************
+ * 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;
+	struct device *dev = &port->dev;
+	__u8 *transfer_buffer;
+	int retval = 0;
+	int t;
+
+	dev_dbg(dev, "%s - command %d\n", __func__, command);
+
+	command_port = port->serial->port[COMMAND_PORT];
+	command_info = usb_get_serial_port_data(command_port);
+
+	if (command_port->bulk_out_size < datasize + 1)
+		return -EIO;
+
+	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) {
+		dev_dbg(dev, "%s - submit urb failed\n", __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) {
+		dev_dbg(dev, "%s - command timed out.\n", __func__);
+		retval = -ETIMEDOUT;
+		goto exit;
+	}
+
+	if (command_info->command_finished == WHITEHEAT_CMD_FAILURE) {
+		dev_dbg(dev, "%s - command failed.\n", __func__);
+		retval = -EIO;
+		goto exit;
+	}
+
+	if (command_info->command_finished == WHITEHEAT_CMD_COMPLETE) {
+		dev_dbg(dev, "%s - command completed.\n", __func__);
+		switch (command) {
+		case WHITEHEAT_GET_DTR_RTS:
+			info = usb_get_serial_port_data(port);
+			info->mcr = command_info->result_buffer[0];
+			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->port_number + 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->port_number + 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 device *dev = &port->dev;
+	struct whiteheat_port_settings port_settings;
+	unsigned int cflag = tty->termios.c_cflag;
+	speed_t baud;
+
+	port_settings.port = 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;
+	}
+	dev_dbg(dev, "%s - data bits = %d\n", __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;
+	dev_dbg(dev, "%s - parity = %c\n", __func__, port_settings.parity);
+
+	/* figure out the stop bits requested */
+	if (cflag & CSTOPB)
+		port_settings.stop = 2;
+	else
+		port_settings.stop = 1;
+	dev_dbg(dev, "%s - stop bits = %d\n", __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;
+	dev_dbg(dev, "%s - hardware flow control = %s %s %s %s\n", __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;
+	dev_dbg(dev, "%s - software flow control = %c\n", __func__, port_settings.sflow);
+
+	port_settings.xon = START_CHAR(tty);
+	port_settings.xoff = STOP_CHAR(tty);
+	dev_dbg(dev, "%s - XON = %2x, XOFF = %2x\n", __func__, port_settings.xon, port_settings.xoff);
+
+	/* get the baud rate wanted */
+	baud = tty_get_baud_rate(tty);
+	port_settings.baud = cpu_to_le32(baud);
+	dev_dbg(dev, "%s - baud rate = %u\n", __func__, baud);
+
+	/* fixme: should set validated settings */
+	tty_encode_baud_rate(tty, baud, 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->port_number + 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->port_number + 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->port_number + 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->port_number + 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->port_number + 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->port_number + 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);
+}
+
+module_usb_serial_driver(serial_drivers, id_table_combined);
+
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE("GPL");
+
+MODULE_FIRMWARE("whiteheat.fw");
+MODULE_FIRMWARE("whiteheat_loader.fw");