Adding upstream version 6.1.76.upstream/6.1.76upstream

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

1 files changed, 2758 insertions, 0 deletions

diff --git a/drivers/usb/serial/io_ti.c b/drivers/usb/serial/io_ti.c
new file mode 100644
index 000000000..bc3c24ea4
--- /dev/null
+++ b/drivers/usb/serial/io_ti.c
@@ -0,0 +1,2758 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Edgeport USB Serial Converter driver
+ *
+ * Copyright (C) 2000-2002 Inside Out Networks, All rights reserved.
+ * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com>
+ *
+ * Supports the following devices:
+ *	EP/1 EP/2 EP/4 EP/21 EP/22 EP/221 EP/42 EP/421 WATCHPORT
+ *
+ * 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/mutex.h>
+#include <linux/serial.h>
+#include <linux/swab.h>
+#include <linux/kfifo.h>
+#include <linux/ioctl.h>
+#include <linux/firmware.h>
+#include <linux/uaccess.h>
+#include <linux/usb.h>
+#include <linux/usb/serial.h>
+
+#include "io_16654.h"
+#include "io_usbvend.h"
+#include "io_ti.h"
+
+#define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com> and David Iacovelli"
+#define DRIVER_DESC "Edgeport USB Serial Driver"
+
+#define EPROM_PAGE_SIZE		64
+
+
+/* different hardware types */
+#define HARDWARE_TYPE_930	0
+#define HARDWARE_TYPE_TIUMP	1
+
+/* IOCTL_PRIVATE_TI_GET_MODE Definitions */
+#define	TI_MODE_CONFIGURING	0   /* Device has not entered start device */
+#define	TI_MODE_BOOT		1   /* Staying in boot mode		   */
+#define TI_MODE_DOWNLOAD	2   /* Made it to download mode		   */
+#define TI_MODE_TRANSITIONING	3   /*
+				     * Currently in boot mode but
+				     * transitioning to download mode
+				     */
+
+/* read urb state */
+#define EDGE_READ_URB_RUNNING	0
+#define EDGE_READ_URB_STOPPING	1
+#define EDGE_READ_URB_STOPPED	2
+
+
+/* Product information read from the Edgeport */
+struct product_info {
+	int	TiMode;			/* Current TI Mode  */
+	u8	hardware_type;		/* Type of hardware */
+} __packed;
+
+/*
+ * Edgeport firmware header
+ *
+ * "build_number" has been set to 0 in all three of the images I have
+ * seen, and Digi Tech Support suggests that it is safe to ignore it.
+ *
+ * "length" is the number of bytes of actual data following the header.
+ *
+ * "checksum" is the low order byte resulting from adding the values of
+ * all the data bytes.
+ */
+struct edgeport_fw_hdr {
+	u8 major_version;
+	u8 minor_version;
+	__le16 build_number;
+	__le16 length;
+	u8 checksum;
+} __packed;
+
+struct edgeport_port {
+	u16 uart_base;
+	u16 dma_address;
+	u8 shadow_msr;
+	u8 shadow_mcr;
+	u8 shadow_lsr;
+	u8 lsr_mask;
+	u32 ump_read_timeout;		/*
+					 * Number of milliseconds the UMP will
+					 * wait without data before completing
+					 * a read short
+					 */
+	int baud_rate;
+	int close_pending;
+	int lsr_event;
+
+	struct edgeport_serial	*edge_serial;
+	struct usb_serial_port	*port;
+	u8 bUartMode;		/* Port type, 0: RS232, etc. */
+	spinlock_t ep_lock;
+	int ep_read_urb_state;
+	int ep_write_urb_in_use;
+};
+
+struct edgeport_serial {
+	struct product_info product_info;
+	u8 TI_I2C_Type;			/* Type of I2C in UMP */
+	u8 TiReadI2C;			/*
+					 * Set to TRUE if we have read the
+					 * I2c in Boot Mode
+					 */
+	struct mutex es_lock;
+	int num_ports_open;
+	struct usb_serial *serial;
+	struct delayed_work heartbeat_work;
+	int fw_version;
+	bool use_heartbeat;
+};
+
+
+/* Devices that this driver supports */
+static const struct usb_device_id edgeport_1port_id_table[] = {
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_1) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1I) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROXIMITY) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOTION) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOISTURE) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_TEMPERATURE) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_HUMIDITY) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_POWER) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_LIGHT) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_RADIATION) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_DISTANCE) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_ACCELERATION) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROX_DIST) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_HP4CD) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_PCI) },
+	{ }
+};
+
+static const struct usb_device_id edgeport_2port_id_table[] = {
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2C) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2I) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_421) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_42) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4I) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22I) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_221C) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22C) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21C) },
+	/* The 4, 8 and 16 port devices show up as multiple 2 port devices */
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4S) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8S) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416B) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_E5805A) },
+	{ }
+};
+
+/* Devices that this driver supports */
+static const struct usb_device_id id_table_combined[] = {
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_1) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1I) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROXIMITY) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOTION) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOISTURE) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_TEMPERATURE) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_HUMIDITY) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_POWER) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_LIGHT) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_RADIATION) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_DISTANCE) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_ACCELERATION) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROX_DIST) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_HP4CD) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_PCI) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2C) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2I) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_421) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_42) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4I) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22I) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_221C) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22C) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21C) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4S) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8S) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416B) },
+	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_E5805A) },
+	{ }
+};
+
+MODULE_DEVICE_TABLE(usb, id_table_combined);
+
+static bool ignore_cpu_rev;
+static int default_uart_mode;		/* RS232 */
+
+static void edge_tty_recv(struct usb_serial_port *port, unsigned char *data,
+		int length);
+
+static void stop_read(struct edgeport_port *edge_port);
+static int restart_read(struct edgeport_port *edge_port);
+
+static void edge_set_termios(struct tty_struct *tty,
+			     struct usb_serial_port *port,
+			     const struct ktermios *old_termios);
+static void edge_send(struct usb_serial_port *port, struct tty_struct *tty);
+
+static int do_download_mode(struct edgeport_serial *serial,
+		const struct firmware *fw);
+static int do_boot_mode(struct edgeport_serial *serial,
+		const struct firmware *fw);
+
+/* sysfs attributes */
+static int edge_create_sysfs_attrs(struct usb_serial_port *port);
+static int edge_remove_sysfs_attrs(struct usb_serial_port *port);
+
+/*
+ * Some release of Edgeport firmware "down3.bin" after version 4.80
+ * introduced code to automatically disconnect idle devices on some
+ * Edgeport models after periods of inactivity, typically ~60 seconds.
+ * This occurs without regard to whether ports on the device are open
+ * or not.  Digi International Tech Support suggested:
+ *
+ * 1.  Adding driver "heartbeat" code to reset the firmware timer by
+ *     requesting a descriptor record every 15 seconds, which should be
+ *     effective with newer firmware versions that require it, and benign
+ *     with older versions that do not. In practice 40 seconds seems often
+ *     enough.
+ * 2.  The heartbeat code is currently required only on Edgeport/416 models.
+ */
+#define FW_HEARTBEAT_VERSION_CUTOFF ((4 << 8) + 80)
+#define FW_HEARTBEAT_SECS 40
+
+/* Timeouts in msecs: firmware downloads take longer */
+#define TI_VSEND_TIMEOUT_DEFAULT 1000
+#define TI_VSEND_TIMEOUT_FW_DOWNLOAD 10000
+
+static int ti_vread_sync(struct usb_device *dev, u8 request, u16 value,
+		u16 index, void *data, int size)
+{
+	int status;
+
+	status = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), request,
+			(USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN),
+			value, index, data, size, 1000);
+	if (status < 0)
+		return status;
+	if (status != size) {
+		dev_dbg(&dev->dev, "%s - wanted to read %d, but only read %d\n",
+			__func__, size, status);
+		return -ECOMM;
+	}
+	return 0;
+}
+
+static int ti_vsend_sync(struct usb_device *dev, u8 request, u16 value,
+		u16 index, void *data, int size, int timeout)
+{
+	int status;
+
+	status = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), request,
+			(USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT),
+			value, index, data, size, timeout);
+	if (status < 0)
+		return status;
+
+	return 0;
+}
+
+static int read_port_cmd(struct usb_serial_port *port, u8 command, u16 value,
+		void *data, int size)
+{
+	return ti_vread_sync(port->serial->dev, command, value,
+			UMPM_UART1_PORT + port->port_number,
+			data, size);
+}
+
+static int send_port_cmd(struct usb_serial_port *port, u8 command, u16 value,
+		void *data, int size)
+{
+	return ti_vsend_sync(port->serial->dev, command, value,
+			UMPM_UART1_PORT + port->port_number,
+			data, size, TI_VSEND_TIMEOUT_DEFAULT);
+}
+
+/* clear tx/rx buffers and fifo in TI UMP */
+static int purge_port(struct usb_serial_port *port, u16 mask)
+{
+	int port_number = port->port_number;
+
+	dev_dbg(&port->dev, "%s - port %d, mask %x\n", __func__, port_number, mask);
+
+	return send_port_cmd(port, UMPC_PURGE_PORT, mask, NULL, 0);
+}
+
+/**
+ * read_download_mem - Read edgeport memory from TI chip
+ * @dev: usb device pointer
+ * @start_address: Device CPU address at which to read
+ * @length: Length of above data
+ * @address_type: Can read both XDATA and I2C
+ * @buffer: pointer to input data buffer
+ */
+static int read_download_mem(struct usb_device *dev, int start_address,
+				int length, u8 address_type, u8 *buffer)
+{
+	int status = 0;
+	u8 read_length;
+	u16 be_start_address;
+
+	dev_dbg(&dev->dev, "%s - @ %x for %d\n", __func__, start_address, length);
+
+	/*
+	 * Read in blocks of 64 bytes
+	 * (TI firmware can't handle more than 64 byte reads)
+	 */
+	while (length) {
+		if (length > 64)
+			read_length = 64;
+		else
+			read_length = (u8)length;
+
+		if (read_length > 1) {
+			dev_dbg(&dev->dev, "%s - @ %x for %d\n", __func__, start_address, read_length);
+		}
+		/*
+		 * NOTE: Must use swab as wIndex is sent in little-endian
+		 *       byte order regardless of host byte order.
+		 */
+		be_start_address = swab16((u16)start_address);
+		status = ti_vread_sync(dev, UMPC_MEMORY_READ,
+					(u16)address_type,
+					be_start_address,
+					buffer, read_length);
+
+		if (status) {
+			dev_dbg(&dev->dev, "%s - ERROR %x\n", __func__, status);
+			return status;
+		}
+
+		if (read_length > 1)
+			usb_serial_debug_data(&dev->dev, __func__, read_length, buffer);
+
+		/* Update pointers/length */
+		start_address += read_length;
+		buffer += read_length;
+		length -= read_length;
+	}
+
+	return status;
+}
+
+static int read_ram(struct usb_device *dev, int start_address,
+						int length, u8 *buffer)
+{
+	return read_download_mem(dev, start_address, length,
+					DTK_ADDR_SPACE_XDATA, buffer);
+}
+
+/* Read edgeport memory to a given block */
+static int read_boot_mem(struct edgeport_serial *serial,
+				int start_address, int length, u8 *buffer)
+{
+	int status = 0;
+	int i;
+
+	for (i = 0; i < length; i++) {
+		status = ti_vread_sync(serial->serial->dev,
+				UMPC_MEMORY_READ, serial->TI_I2C_Type,
+				(u16)(start_address+i), &buffer[i], 0x01);
+		if (status) {
+			dev_dbg(&serial->serial->dev->dev, "%s - ERROR %x\n", __func__, status);
+			return status;
+		}
+	}
+
+	dev_dbg(&serial->serial->dev->dev, "%s - start_address = %x, length = %d\n",
+		__func__, start_address, length);
+	usb_serial_debug_data(&serial->serial->dev->dev, __func__, length, buffer);
+
+	serial->TiReadI2C = 1;
+
+	return status;
+}
+
+/* Write given block to TI EPROM memory */
+static int write_boot_mem(struct edgeport_serial *serial,
+				int start_address, int length, u8 *buffer)
+{
+	int status = 0;
+	int i;
+	u8 *temp;
+
+	/* Must do a read before write */
+	if (!serial->TiReadI2C) {
+		temp = kmalloc(1, GFP_KERNEL);
+		if (!temp)
+			return -ENOMEM;
+
+		status = read_boot_mem(serial, 0, 1, temp);
+		kfree(temp);
+		if (status)
+			return status;
+	}
+
+	for (i = 0; i < length; ++i) {
+		status = ti_vsend_sync(serial->serial->dev, UMPC_MEMORY_WRITE,
+				buffer[i], (u16)(i + start_address), NULL,
+				0, TI_VSEND_TIMEOUT_DEFAULT);
+		if (status)
+			return status;
+	}
+
+	dev_dbg(&serial->serial->dev->dev, "%s - start_sddr = %x, length = %d\n", __func__, start_address, length);
+	usb_serial_debug_data(&serial->serial->dev->dev, __func__, length, buffer);
+
+	return status;
+}
+
+/* Write edgeport I2C memory to TI chip	*/
+static int write_i2c_mem(struct edgeport_serial *serial,
+		int start_address, int length, u8 address_type, u8 *buffer)
+{
+	struct device *dev = &serial->serial->dev->dev;
+	int status = 0;
+	int write_length;
+	u16 be_start_address;
+
+	/* We can only send a maximum of 1 aligned byte page at a time */
+
+	/* calculate the number of bytes left in the first page */
+	write_length = EPROM_PAGE_SIZE -
+				(start_address & (EPROM_PAGE_SIZE - 1));
+
+	if (write_length > length)
+		write_length = length;
+
+	dev_dbg(dev, "%s - BytesInFirstPage Addr = %x, length = %d\n",
+		__func__, start_address, write_length);
+	usb_serial_debug_data(dev, __func__, write_length, buffer);
+
+	/*
+	 * Write first page.
+	 *
+	 * NOTE: Must use swab as wIndex is sent in little-endian byte order
+	 *       regardless of host byte order.
+	 */
+	be_start_address = swab16((u16)start_address);
+	status = ti_vsend_sync(serial->serial->dev, UMPC_MEMORY_WRITE,
+				(u16)address_type, be_start_address,
+				buffer,	write_length, TI_VSEND_TIMEOUT_DEFAULT);
+	if (status) {
+		dev_dbg(dev, "%s - ERROR %d\n", __func__, status);
+		return status;
+	}
+
+	length		-= write_length;
+	start_address	+= write_length;
+	buffer		+= write_length;
+
+	/*
+	 * We should be aligned now -- can write max page size bytes at a
+	 * time.
+	 */
+	while (length) {
+		if (length > EPROM_PAGE_SIZE)
+			write_length = EPROM_PAGE_SIZE;
+		else
+			write_length = length;
+
+		dev_dbg(dev, "%s - Page Write Addr = %x, length = %d\n",
+			__func__, start_address, write_length);
+		usb_serial_debug_data(dev, __func__, write_length, buffer);
+
+		/*
+		 * Write next page.
+		 *
+		 * NOTE: Must use swab as wIndex is sent in little-endian byte
+		 *       order regardless of host byte order.
+		 */
+		be_start_address = swab16((u16)start_address);
+		status = ti_vsend_sync(serial->serial->dev, UMPC_MEMORY_WRITE,
+				(u16)address_type, be_start_address, buffer,
+				write_length, TI_VSEND_TIMEOUT_DEFAULT);
+		if (status) {
+			dev_err(dev, "%s - ERROR %d\n", __func__, status);
+			return status;
+		}
+
+		length		-= write_length;
+		start_address	+= write_length;
+		buffer		+= write_length;
+	}
+	return status;
+}
+
+/*
+ * Examine the UMP DMA registers and LSR
+ *
+ * Check the MSBit of the X and Y DMA byte count registers.
+ * A zero in this bit indicates that the TX DMA buffers are empty
+ * then check the TX Empty bit in the UART.
+ */
+static int tx_active(struct edgeport_port *port)
+{
+	int status;
+	struct out_endpoint_desc_block *oedb;
+	u8 *lsr;
+	int bytes_left = 0;
+
+	oedb = kmalloc(sizeof(*oedb), GFP_KERNEL);
+	if (!oedb)
+		return -ENOMEM;
+
+	/*
+	 * Sigh, that's right, just one byte, as not all platforms can
+	 * do DMA from stack
+	 */
+	lsr = kmalloc(1, GFP_KERNEL);
+	if (!lsr) {
+		kfree(oedb);
+		return -ENOMEM;
+	}
+	/* Read the DMA Count Registers */
+	status = read_ram(port->port->serial->dev, port->dma_address,
+						sizeof(*oedb), (void *)oedb);
+	if (status)
+		goto exit_is_tx_active;
+
+	dev_dbg(&port->port->dev, "%s - XByteCount    0x%X\n", __func__, oedb->XByteCount);
+
+	/* and the LSR */
+	status = read_ram(port->port->serial->dev,
+			port->uart_base + UMPMEM_OFFS_UART_LSR, 1, lsr);
+
+	if (status)
+		goto exit_is_tx_active;
+	dev_dbg(&port->port->dev, "%s - LSR = 0x%X\n", __func__, *lsr);
+
+	/* If either buffer has data or we are transmitting then return TRUE */
+	if ((oedb->XByteCount & 0x80) != 0)
+		bytes_left += 64;
+
+	if ((*lsr & UMP_UART_LSR_TX_MASK) == 0)
+		bytes_left += 1;
+
+	/* We return Not Active if we get any kind of error */
+exit_is_tx_active:
+	dev_dbg(&port->port->dev, "%s - return %d\n", __func__, bytes_left);
+
+	kfree(lsr);
+	kfree(oedb);
+	return bytes_left;
+}
+
+static int choose_config(struct usb_device *dev)
+{
+	/*
+	 * There may be multiple configurations on this device, in which case
+	 * we would need to read and parse all of them to find out which one
+	 * we want. However, we just support one config at this point,
+	 * configuration # 1, which is Config Descriptor 0.
+	 */
+
+	dev_dbg(&dev->dev, "%s - Number of Interfaces = %d\n",
+		__func__, dev->config->desc.bNumInterfaces);
+	dev_dbg(&dev->dev, "%s - MAX Power            = %d\n",
+		__func__, dev->config->desc.bMaxPower * 2);
+
+	if (dev->config->desc.bNumInterfaces != 1) {
+		dev_err(&dev->dev, "%s - bNumInterfaces is not 1, ERROR!\n", __func__);
+		return -ENODEV;
+	}
+
+	return 0;
+}
+
+static int read_rom(struct edgeport_serial *serial,
+				int start_address, int length, u8 *buffer)
+{
+	int status;
+
+	if (serial->product_info.TiMode == TI_MODE_DOWNLOAD) {
+		status = read_download_mem(serial->serial->dev,
+					       start_address,
+					       length,
+					       serial->TI_I2C_Type,
+					       buffer);
+	} else {
+		status = read_boot_mem(serial, start_address, length,
+								buffer);
+	}
+	return status;
+}
+
+static int write_rom(struct edgeport_serial *serial, int start_address,
+						int length, u8 *buffer)
+{
+	if (serial->product_info.TiMode == TI_MODE_BOOT)
+		return write_boot_mem(serial, start_address, length,
+								buffer);
+
+	if (serial->product_info.TiMode == TI_MODE_DOWNLOAD)
+		return write_i2c_mem(serial, start_address, length,
+						serial->TI_I2C_Type, buffer);
+	return -EINVAL;
+}
+
+/* Read a descriptor header from I2C based on type */
+static int get_descriptor_addr(struct edgeport_serial *serial,
+				int desc_type, struct ti_i2c_desc *rom_desc)
+{
+	int start_address;
+	int status;
+
+	/* Search for requested descriptor in I2C */
+	start_address = 2;
+	do {
+		status = read_rom(serial,
+				   start_address,
+				   sizeof(struct ti_i2c_desc),
+				   (u8 *)rom_desc);
+		if (status)
+			return 0;
+
+		if (rom_desc->Type == desc_type)
+			return start_address;
+
+		start_address = start_address + sizeof(struct ti_i2c_desc) +
+						le16_to_cpu(rom_desc->Size);
+
+	} while ((start_address < TI_MAX_I2C_SIZE) && rom_desc->Type);
+
+	return 0;
+}
+
+/* Validate descriptor checksum */
+static int valid_csum(struct ti_i2c_desc *rom_desc, u8 *buffer)
+{
+	u16 i;
+	u8 cs = 0;
+
+	for (i = 0; i < le16_to_cpu(rom_desc->Size); i++)
+		cs = (u8)(cs + buffer[i]);
+
+	if (cs != rom_desc->CheckSum) {
+		pr_debug("%s - Mismatch %x - %x", __func__, rom_desc->CheckSum, cs);
+		return -EINVAL;
+	}
+	return 0;
+}
+
+/* Make sure that the I2C image is good */
+static int check_i2c_image(struct edgeport_serial *serial)
+{
+	struct device *dev = &serial->serial->dev->dev;
+	int status = 0;
+	struct ti_i2c_desc *rom_desc;
+	int start_address = 2;
+	u8 *buffer;
+	u16 ttype;
+
+	rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL);
+	if (!rom_desc)
+		return -ENOMEM;
+
+	buffer = kmalloc(TI_MAX_I2C_SIZE, GFP_KERNEL);
+	if (!buffer) {
+		kfree(rom_desc);
+		return -ENOMEM;
+	}
+
+	/* Read the first byte (Signature0) must be 0x52 or 0x10 */
+	status = read_rom(serial, 0, 1, buffer);
+	if (status)
+		goto out;
+
+	if (*buffer != UMP5152 && *buffer != UMP3410) {
+		dev_err(dev, "%s - invalid buffer signature\n", __func__);
+		status = -ENODEV;
+		goto out;
+	}
+
+	do {
+		/* Validate the I2C */
+		status = read_rom(serial,
+				start_address,
+				sizeof(struct ti_i2c_desc),
+				(u8 *)rom_desc);
+		if (status)
+			break;
+
+		if ((start_address + sizeof(struct ti_i2c_desc) +
+			le16_to_cpu(rom_desc->Size)) > TI_MAX_I2C_SIZE) {
+			status = -ENODEV;
+			dev_dbg(dev, "%s - structure too big, erroring out.\n", __func__);
+			break;
+		}
+
+		dev_dbg(dev, "%s Type = 0x%x\n", __func__, rom_desc->Type);
+
+		/* Skip type 2 record */
+		ttype = rom_desc->Type & 0x0f;
+		if (ttype != I2C_DESC_TYPE_FIRMWARE_BASIC
+			&& ttype != I2C_DESC_TYPE_FIRMWARE_AUTO) {
+			/* Read the descriptor data */
+			status = read_rom(serial, start_address +
+						sizeof(struct ti_i2c_desc),
+						le16_to_cpu(rom_desc->Size),
+						buffer);
+			if (status)
+				break;
+
+			status = valid_csum(rom_desc, buffer);
+			if (status)
+				break;
+		}
+		start_address = start_address + sizeof(struct ti_i2c_desc) +
+						le16_to_cpu(rom_desc->Size);
+
+	} while ((rom_desc->Type != I2C_DESC_TYPE_ION) &&
+				(start_address < TI_MAX_I2C_SIZE));
+
+	if ((rom_desc->Type != I2C_DESC_TYPE_ION) ||
+				(start_address > TI_MAX_I2C_SIZE))
+		status = -ENODEV;
+
+out:
+	kfree(buffer);
+	kfree(rom_desc);
+	return status;
+}
+
+static int get_manuf_info(struct edgeport_serial *serial, u8 *buffer)
+{
+	int status;
+	int start_address;
+	struct ti_i2c_desc *rom_desc;
+	struct edge_ti_manuf_descriptor *desc;
+	struct device *dev = &serial->serial->dev->dev;
+
+	rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL);
+	if (!rom_desc)
+		return -ENOMEM;
+
+	start_address = get_descriptor_addr(serial, I2C_DESC_TYPE_ION,
+								rom_desc);
+
+	if (!start_address) {
+		dev_dbg(dev, "%s - Edge Descriptor not found in I2C\n", __func__);
+		status = -ENODEV;
+		goto exit;
+	}
+
+	/* Read the descriptor data */
+	status = read_rom(serial, start_address+sizeof(struct ti_i2c_desc),
+					le16_to_cpu(rom_desc->Size), buffer);
+	if (status)
+		goto exit;
+
+	status = valid_csum(rom_desc, buffer);
+
+	desc = (struct edge_ti_manuf_descriptor *)buffer;
+	dev_dbg(dev, "%s - IonConfig      0x%x\n", __func__, desc->IonConfig);
+	dev_dbg(dev, "%s - Version          %d\n", __func__, desc->Version);
+	dev_dbg(dev, "%s - Cpu/Board      0x%x\n", __func__, desc->CpuRev_BoardRev);
+	dev_dbg(dev, "%s - NumPorts         %d\n", __func__, desc->NumPorts);
+	dev_dbg(dev, "%s - NumVirtualPorts  %d\n", __func__, desc->NumVirtualPorts);
+	dev_dbg(dev, "%s - TotalPorts       %d\n", __func__, desc->TotalPorts);
+
+exit:
+	kfree(rom_desc);
+	return status;
+}
+
+/* Build firmware header used for firmware update */
+static int build_i2c_fw_hdr(u8 *header, const struct firmware *fw)
+{
+	u8 *buffer;
+	int buffer_size;
+	int i;
+	u8 cs = 0;
+	struct ti_i2c_desc *i2c_header;
+	struct ti_i2c_image_header *img_header;
+	struct ti_i2c_firmware_rec *firmware_rec;
+	struct edgeport_fw_hdr *fw_hdr = (struct edgeport_fw_hdr *)fw->data;
+
+	/*
+	 * In order to update the I2C firmware we must change the type 2 record
+	 * to type 0xF2.  This will force the UMP to come up in Boot Mode.
+	 * Then while in boot mode, the driver will download the latest
+	 * firmware (padded to 15.5k) into the UMP ram.  And finally when the
+	 * device comes back up in download mode the driver will cause the new
+	 * firmware to be copied from the UMP Ram to I2C and the firmware will
+	 * update the record type from 0xf2 to 0x02.
+	 */
+
+	/*
+	 * Allocate a 15.5k buffer + 2 bytes for version number (Firmware
+	 * Record)
+	 */
+	buffer_size = (((1024 * 16) - 512 ) +
+			sizeof(struct ti_i2c_firmware_rec));
+
+	buffer = kmalloc(buffer_size, GFP_KERNEL);
+	if (!buffer)
+		return -ENOMEM;
+
+	/* Set entire image of 0xffs */
+	memset(buffer, 0xff, buffer_size);
+
+	/* Copy version number into firmware record */
+	firmware_rec = (struct ti_i2c_firmware_rec *)buffer;
+
+	firmware_rec->Ver_Major	= fw_hdr->major_version;
+	firmware_rec->Ver_Minor	= fw_hdr->minor_version;
+
+	/* Pointer to fw_down memory image */
+	img_header = (struct ti_i2c_image_header *)&fw->data[4];
+
+	memcpy(buffer + sizeof(struct ti_i2c_firmware_rec),
+		&fw->data[4 + sizeof(struct ti_i2c_image_header)],
+		le16_to_cpu(img_header->Length));
+
+	for (i=0; i < buffer_size; i++) {
+		cs = (u8)(cs + buffer[i]);
+	}
+
+	kfree(buffer);
+
+	/* Build new header */
+	i2c_header =  (struct ti_i2c_desc *)header;
+	firmware_rec =  (struct ti_i2c_firmware_rec*)i2c_header->Data;
+
+	i2c_header->Type	= I2C_DESC_TYPE_FIRMWARE_BLANK;
+	i2c_header->Size	= cpu_to_le16(buffer_size);
+	i2c_header->CheckSum	= cs;
+	firmware_rec->Ver_Major	= fw_hdr->major_version;
+	firmware_rec->Ver_Minor	= fw_hdr->minor_version;
+
+	return 0;
+}
+
+/* Try to figure out what type of I2c we have */
+static int i2c_type_bootmode(struct edgeport_serial *serial)
+{
+	struct device *dev = &serial->serial->dev->dev;
+	int status;
+	u8 *data;
+
+	data = kmalloc(1, GFP_KERNEL);
+	if (!data)
+		return -ENOMEM;
+
+	/* Try to read type 2 */
+	status = ti_vread_sync(serial->serial->dev, UMPC_MEMORY_READ,
+				DTK_ADDR_SPACE_I2C_TYPE_II, 0, data, 0x01);
+	if (status)
+		dev_dbg(dev, "%s - read 2 status error = %d\n", __func__, status);
+	else
+		dev_dbg(dev, "%s - read 2 data = 0x%x\n", __func__, *data);
+	if ((!status) && (*data == UMP5152 || *data == UMP3410)) {
+		dev_dbg(dev, "%s - ROM_TYPE_II\n", __func__);
+		serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
+		goto out;
+	}
+
+	/* Try to read type 3 */
+	status = ti_vread_sync(serial->serial->dev, UMPC_MEMORY_READ,
+				DTK_ADDR_SPACE_I2C_TYPE_III, 0,	data, 0x01);
+	if (status)
+		dev_dbg(dev, "%s - read 3 status error = %d\n", __func__, status);
+	else
+		dev_dbg(dev, "%s - read 2 data = 0x%x\n", __func__, *data);
+	if ((!status) && (*data == UMP5152 || *data == UMP3410)) {
+		dev_dbg(dev, "%s - ROM_TYPE_III\n", __func__);
+		serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_III;
+		goto out;
+	}
+
+	dev_dbg(dev, "%s - Unknown\n", __func__);
+	serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
+	status = -ENODEV;
+out:
+	kfree(data);
+	return status;
+}
+
+static int bulk_xfer(struct usb_serial *serial, void *buffer,
+						int length, int *num_sent)
+{
+	int status;
+
+	status = usb_bulk_msg(serial->dev,
+			usb_sndbulkpipe(serial->dev,
+				serial->port[0]->bulk_out_endpointAddress),
+			buffer, length, num_sent, 1000);
+	return status;
+}
+
+/* Download given firmware image to the device (IN BOOT MODE) */
+static int download_code(struct edgeport_serial *serial, u8 *image,
+							int image_length)
+{
+	int status = 0;
+	int pos;
+	int transfer;
+	int done;
+
+	/* Transfer firmware image */
+	for (pos = 0; pos < image_length; ) {
+		/* Read the next buffer from file */
+		transfer = image_length - pos;
+		if (transfer > EDGE_FW_BULK_MAX_PACKET_SIZE)
+			transfer = EDGE_FW_BULK_MAX_PACKET_SIZE;
+
+		/* Transfer data */
+		status = bulk_xfer(serial->serial, &image[pos],
+							transfer, &done);
+		if (status)
+			break;
+		/* Advance buffer pointer */
+		pos += done;
+	}
+
+	return status;
+}
+
+/* FIXME!!! */
+static int config_boot_dev(struct usb_device *dev)
+{
+	return 0;
+}
+
+static int ti_cpu_rev(struct edge_ti_manuf_descriptor *desc)
+{
+	return TI_GET_CPU_REVISION(desc->CpuRev_BoardRev);
+}
+
+static int check_fw_sanity(struct edgeport_serial *serial,
+		const struct firmware *fw)
+{
+	u16 length_total;
+	u8 checksum = 0;
+	int pos;
+	struct device *dev = &serial->serial->interface->dev;
+	struct edgeport_fw_hdr *fw_hdr = (struct edgeport_fw_hdr *)fw->data;
+
+	if (fw->size < sizeof(struct edgeport_fw_hdr)) {
+		dev_err(dev, "incomplete fw header\n");
+		return -EINVAL;
+	}
+
+	length_total = le16_to_cpu(fw_hdr->length) +
+			sizeof(struct edgeport_fw_hdr);
+
+	if (fw->size != length_total) {
+		dev_err(dev, "bad fw size (expected: %u, got: %zu)\n",
+				length_total, fw->size);
+		return -EINVAL;
+	}
+
+	for (pos = sizeof(struct edgeport_fw_hdr); pos < fw->size; ++pos)
+		checksum += fw->data[pos];
+
+	if (checksum != fw_hdr->checksum) {
+		dev_err(dev, "bad fw checksum (expected: 0x%x, got: 0x%x)\n",
+				fw_hdr->checksum, checksum);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+/*
+ * DownloadTIFirmware - Download run-time operating firmware to the TI5052
+ *
+ * This routine downloads the main operating code into the TI5052, using the
+ * boot code already burned into E2PROM or ROM.
+ */
+static int download_fw(struct edgeport_serial *serial)
+{
+	struct device *dev = &serial->serial->interface->dev;
+	int status = 0;
+	struct usb_interface_descriptor *interface;
+	const struct firmware *fw;
+	const char *fw_name = "edgeport/down3.bin";
+	struct edgeport_fw_hdr *fw_hdr;
+
+	status = request_firmware(&fw, fw_name, dev);
+	if (status) {
+		dev_err(dev, "Failed to load image \"%s\" err %d\n",
+				fw_name, status);
+		return status;
+	}
+
+	if (check_fw_sanity(serial, fw)) {
+		status = -EINVAL;
+		goto out;
+	}
+
+	fw_hdr = (struct edgeport_fw_hdr *)fw->data;
+
+	/* If on-board version is newer, "fw_version" will be updated later. */
+	serial->fw_version = (fw_hdr->major_version << 8) +
+			fw_hdr->minor_version;
+
+	/*
+	 * This routine is entered by both the BOOT mode and the Download mode
+	 * We can determine which code is running by the reading the config
+	 * descriptor and if we have only one bulk pipe it is in boot mode
+	 */
+	serial->product_info.hardware_type = HARDWARE_TYPE_TIUMP;
+
+	/* Default to type 2 i2c */
+	serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
+
+	status = choose_config(serial->serial->dev);
+	if (status)
+		goto out;
+
+	interface = &serial->serial->interface->cur_altsetting->desc;
+	if (!interface) {
+		dev_err(dev, "%s - no interface set, error!\n", __func__);
+		status = -ENODEV;
+		goto out;
+	}
+
+	/*
+	 * Setup initial mode -- the default mode 0 is TI_MODE_CONFIGURING
+	 * if we have more than one endpoint we are definitely in download
+	 * mode
+	 */
+	if (interface->bNumEndpoints > 1) {
+		serial->product_info.TiMode = TI_MODE_DOWNLOAD;
+		status = do_download_mode(serial, fw);
+	} else {
+		/* Otherwise we will remain in configuring mode */
+		serial->product_info.TiMode = TI_MODE_CONFIGURING;
+		status = do_boot_mode(serial, fw);
+	}
+
+out:
+	release_firmware(fw);
+	return status;
+}
+
+static int do_download_mode(struct edgeport_serial *serial,
+		const struct firmware *fw)
+{
+	struct device *dev = &serial->serial->interface->dev;
+	int status = 0;
+	int start_address;
+	struct edge_ti_manuf_descriptor *ti_manuf_desc;
+	int download_cur_ver;
+	int download_new_ver;
+	struct edgeport_fw_hdr *fw_hdr = (struct edgeport_fw_hdr *)fw->data;
+	struct ti_i2c_desc *rom_desc;
+
+	dev_dbg(dev, "%s - RUNNING IN DOWNLOAD MODE\n", __func__);
+
+	status = check_i2c_image(serial);
+	if (status) {
+		dev_dbg(dev, "%s - DOWNLOAD MODE -- BAD I2C\n", __func__);
+		return status;
+	}
+
+	/*
+	 * Validate Hardware version number
+	 * Read Manufacturing Descriptor from TI Based Edgeport
+	 */
+	ti_manuf_desc = kmalloc(sizeof(*ti_manuf_desc), GFP_KERNEL);
+	if (!ti_manuf_desc)
+		return -ENOMEM;
+
+	status = get_manuf_info(serial, (u8 *)ti_manuf_desc);
+	if (status) {
+		kfree(ti_manuf_desc);
+		return status;
+	}
+
+	/* Check version number of ION descriptor */
+	if (!ignore_cpu_rev && ti_cpu_rev(ti_manuf_desc) < 2) {
+		dev_dbg(dev, "%s - Wrong CPU Rev %d (Must be 2)\n",
+			__func__, ti_cpu_rev(ti_manuf_desc));
+		kfree(ti_manuf_desc);
+		return -EINVAL;
+	}
+
+	rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL);
+	if (!rom_desc) {
+		kfree(ti_manuf_desc);
+		return -ENOMEM;
+	}
+
+	/* Search for type 2 record (firmware record) */
+	start_address = get_descriptor_addr(serial,
+			I2C_DESC_TYPE_FIRMWARE_BASIC, rom_desc);
+	if (start_address != 0) {
+		struct ti_i2c_firmware_rec *firmware_version;
+		u8 *record;
+
+		dev_dbg(dev, "%s - Found Type FIRMWARE (Type 2) record\n",
+				__func__);
+
+		firmware_version = kmalloc(sizeof(*firmware_version),
+							GFP_KERNEL);
+		if (!firmware_version) {
+			kfree(rom_desc);
+			kfree(ti_manuf_desc);
+			return -ENOMEM;
+		}
+
+		/*
+		 * Validate version number
+		 * Read the descriptor data
+		 */
+		status = read_rom(serial, start_address +
+				sizeof(struct ti_i2c_desc),
+				sizeof(struct ti_i2c_firmware_rec),
+				(u8 *)firmware_version);
+		if (status) {
+			kfree(firmware_version);
+			kfree(rom_desc);
+			kfree(ti_manuf_desc);
+			return status;
+		}
+
+		/*
+		 * Check version number of download with current
+		 * version in I2c
+		 */
+		download_cur_ver = (firmware_version->Ver_Major << 8) +
+				   (firmware_version->Ver_Minor);
+		download_new_ver = (fw_hdr->major_version << 8) +
+				   (fw_hdr->minor_version);
+
+		dev_dbg(dev, "%s - >> FW Versions Device %d.%d  Driver %d.%d\n",
+			__func__, firmware_version->Ver_Major,
+			firmware_version->Ver_Minor,
+			fw_hdr->major_version, fw_hdr->minor_version);
+
+		/*
+		 * Check if we have an old version in the I2C and
+		 * update if necessary
+		 */
+		if (download_cur_ver < download_new_ver) {
+			dev_dbg(dev, "%s - Update I2C dld from %d.%d to %d.%d\n",
+				__func__,
+				firmware_version->Ver_Major,
+				firmware_version->Ver_Minor,
+				fw_hdr->major_version,
+				fw_hdr->minor_version);
+
+			record = kmalloc(1, GFP_KERNEL);
+			if (!record) {
+				kfree(firmware_version);
+				kfree(rom_desc);
+				kfree(ti_manuf_desc);
+				return -ENOMEM;
+			}
+			/*
+			 * In order to update the I2C firmware we must
+			 * change the type 2 record to type 0xF2. This
+			 * will force the UMP to come up in Boot Mode.
+			 * Then while in boot mode, the driver will
+			 * download the latest firmware (padded to
+			 * 15.5k) into the UMP ram. Finally when the
+			 * device comes back up in download mode the
+			 * driver will cause the new firmware to be
+			 * copied from the UMP Ram to I2C and the
+			 * firmware will update the record type from
+			 * 0xf2 to 0x02.
+			 */
+			*record = I2C_DESC_TYPE_FIRMWARE_BLANK;
+
+			/*
+			 * Change the I2C Firmware record type to
+			 * 0xf2 to trigger an update
+			 */
+			status = write_rom(serial, start_address,
+					sizeof(*record), record);
+			if (status) {
+				kfree(record);
+				kfree(firmware_version);
+				kfree(rom_desc);
+				kfree(ti_manuf_desc);
+				return status;
+			}
+
+			/*
+			 * verify the write -- must do this in order
+			 * for write to complete before we do the
+			 * hardware reset
+			 */
+			status = read_rom(serial,
+						start_address,
+						sizeof(*record),
+						record);
+			if (status) {
+				kfree(record);
+				kfree(firmware_version);
+				kfree(rom_desc);
+				kfree(ti_manuf_desc);
+				return status;
+			}
+
+			if (*record != I2C_DESC_TYPE_FIRMWARE_BLANK) {
+				dev_err(dev, "%s - error resetting device\n",
+						__func__);
+				kfree(record);
+				kfree(firmware_version);
+				kfree(rom_desc);
+				kfree(ti_manuf_desc);
+				return -ENODEV;
+			}
+
+			dev_dbg(dev, "%s - HARDWARE RESET\n", __func__);
+
+			/* Reset UMP -- Back to BOOT MODE */
+			status = ti_vsend_sync(serial->serial->dev,
+					UMPC_HARDWARE_RESET,
+					0, 0, NULL, 0,
+					TI_VSEND_TIMEOUT_DEFAULT);
+
+			dev_dbg(dev, "%s - HARDWARE RESET return %d\n",
+					__func__, status);
+
+			/* return an error on purpose. */
+			kfree(record);
+			kfree(firmware_version);
+			kfree(rom_desc);
+			kfree(ti_manuf_desc);
+			return -ENODEV;
+		}
+		/* Same or newer fw version is already loaded */
+		serial->fw_version = download_cur_ver;
+		kfree(firmware_version);
+	}
+	/* Search for type 0xF2 record (firmware blank record) */
+	else {
+		start_address = get_descriptor_addr(serial,
+				I2C_DESC_TYPE_FIRMWARE_BLANK, rom_desc);
+		if (start_address != 0) {
+#define HEADER_SIZE	(sizeof(struct ti_i2c_desc) + \
+				sizeof(struct ti_i2c_firmware_rec))
+			u8 *header;
+			u8 *vheader;
+
+			header = kmalloc(HEADER_SIZE, GFP_KERNEL);
+			if (!header) {
+				kfree(rom_desc);
+				kfree(ti_manuf_desc);
+				return -ENOMEM;
+			}
+
+			vheader = kmalloc(HEADER_SIZE, GFP_KERNEL);
+			if (!vheader) {
+				kfree(header);
+				kfree(rom_desc);
+				kfree(ti_manuf_desc);
+				return -ENOMEM;
+			}
+
+			dev_dbg(dev, "%s - Found Type BLANK FIRMWARE (Type F2) record\n",
+					__func__);
+
+			/*
+			 * In order to update the I2C firmware we must change
+			 * the type 2 record to type 0xF2. This will force the
+			 * UMP to come up in Boot Mode.  Then while in boot
+			 * mode, the driver will download the latest firmware
+			 * (padded to 15.5k) into the UMP ram. Finally when the
+			 * device comes back up in download mode the driver
+			 * will cause the new firmware to be copied from the
+			 * UMP Ram to I2C and the firmware will update the
+			 * record type from 0xf2 to 0x02.
+			 */
+			status = build_i2c_fw_hdr(header, fw);
+			if (status) {
+				kfree(vheader);
+				kfree(header);
+				kfree(rom_desc);
+				kfree(ti_manuf_desc);
+				return -EINVAL;
+			}
+
+			/*
+			 * Update I2C with type 0xf2 record with correct
+			 * size and checksum
+			 */
+			status = write_rom(serial,
+						start_address,
+						HEADER_SIZE,
+						header);
+			if (status) {
+				kfree(vheader);
+				kfree(header);
+				kfree(rom_desc);
+				kfree(ti_manuf_desc);
+				return -EINVAL;
+			}
+
+			/*
+			 * verify the write -- must do this in order for
+			 * write to complete before we do the hardware reset
+			 */
+			status = read_rom(serial, start_address,
+							HEADER_SIZE, vheader);
+
+			if (status) {
+				dev_dbg(dev, "%s - can't read header back\n",
+						__func__);
+				kfree(vheader);
+				kfree(header);
+				kfree(rom_desc);
+				kfree(ti_manuf_desc);
+				return status;
+			}
+			if (memcmp(vheader, header, HEADER_SIZE)) {
+				dev_dbg(dev, "%s - write download record failed\n",
+						__func__);
+				kfree(vheader);
+				kfree(header);
+				kfree(rom_desc);
+				kfree(ti_manuf_desc);
+				return -EINVAL;
+			}
+
+			kfree(vheader);
+			kfree(header);
+
+			dev_dbg(dev, "%s - Start firmware update\n", __func__);
+
+			/* Tell firmware to copy download image into I2C */
+			status = ti_vsend_sync(serial->serial->dev,
+					UMPC_COPY_DNLD_TO_I2C,
+					0, 0, NULL, 0,
+					TI_VSEND_TIMEOUT_FW_DOWNLOAD);
+
+			dev_dbg(dev, "%s - Update complete 0x%x\n", __func__,
+					status);
+			if (status) {
+				dev_err(dev,
+					"%s - UMPC_COPY_DNLD_TO_I2C failed\n",
+					__func__);
+				kfree(rom_desc);
+				kfree(ti_manuf_desc);
+				return status;
+			}
+		}
+	}
+
+	/* The device is running the download code */
+	kfree(rom_desc);
+	kfree(ti_manuf_desc);
+	return 0;
+}
+
+static int do_boot_mode(struct edgeport_serial *serial,
+		const struct firmware *fw)
+{
+	struct device *dev = &serial->serial->interface->dev;
+	int status = 0;
+	struct edge_ti_manuf_descriptor *ti_manuf_desc;
+	struct edgeport_fw_hdr *fw_hdr = (struct edgeport_fw_hdr *)fw->data;
+
+	dev_dbg(dev, "%s - RUNNING IN BOOT MODE\n", __func__);
+
+	/* Configure the TI device so we can use the BULK pipes for download */
+	status = config_boot_dev(serial->serial->dev);
+	if (status)
+		return status;
+
+	if (le16_to_cpu(serial->serial->dev->descriptor.idVendor)
+							!= USB_VENDOR_ID_ION) {
+		dev_dbg(dev, "%s - VID = 0x%x\n", __func__,
+			le16_to_cpu(serial->serial->dev->descriptor.idVendor));
+		serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
+		goto stayinbootmode;
+	}
+
+	/*
+	 * We have an ION device (I2c Must be programmed)
+	 * Determine I2C image type
+	 */
+	if (i2c_type_bootmode(serial))
+		goto stayinbootmode;
+
+	/* Check for ION Vendor ID and that the I2C is valid */
+	if (!check_i2c_image(serial)) {
+		struct ti_i2c_image_header *header;
+		int i;
+		u8 cs = 0;
+		u8 *buffer;
+		int buffer_size;
+
+		/*
+		 * Validate Hardware version number
+		 * Read Manufacturing Descriptor from TI Based Edgeport
+		 */
+		ti_manuf_desc = kmalloc(sizeof(*ti_manuf_desc), GFP_KERNEL);
+		if (!ti_manuf_desc)
+			return -ENOMEM;
+
+		status = get_manuf_info(serial, (u8 *)ti_manuf_desc);
+		if (status) {
+			kfree(ti_manuf_desc);
+			goto stayinbootmode;
+		}
+
+		/* Check for version 2 */
+		if (!ignore_cpu_rev && ti_cpu_rev(ti_manuf_desc) < 2) {
+			dev_dbg(dev, "%s - Wrong CPU Rev %d (Must be 2)\n",
+				__func__, ti_cpu_rev(ti_manuf_desc));
+			kfree(ti_manuf_desc);
+			goto stayinbootmode;
+		}
+
+		kfree(ti_manuf_desc);
+
+		/*
+		 * In order to update the I2C firmware we must change the type
+		 * 2 record to type 0xF2. This will force the UMP to come up
+		 * in Boot Mode.  Then while in boot mode, the driver will
+		 * download the latest firmware (padded to 15.5k) into the
+		 * UMP ram. Finally when the device comes back up in download
+		 * mode the driver will cause the new firmware to be copied
+		 * from the UMP Ram to I2C and the firmware will update the
+		 * record type from 0xf2 to 0x02.
+		 *
+		 * Do we really have to copy the whole firmware image,
+		 * or could we do this in place!
+		 */
+
+		/* Allocate a 15.5k buffer + 3 byte header */
+		buffer_size = (((1024 * 16) - 512) +
+					sizeof(struct ti_i2c_image_header));
+		buffer = kmalloc(buffer_size, GFP_KERNEL);
+		if (!buffer)
+			return -ENOMEM;
+
+		/* Initialize the buffer to 0xff (pad the buffer) */
+		memset(buffer, 0xff, buffer_size);
+		memcpy(buffer, &fw->data[4], fw->size - 4);
+
+		for (i = sizeof(struct ti_i2c_image_header);
+				i < buffer_size; i++) {
+			cs = (u8)(cs + buffer[i]);
+		}
+
+		header = (struct ti_i2c_image_header *)buffer;
+
+		/* update length and checksum after padding */
+		header->Length = cpu_to_le16((u16)(buffer_size -
+					sizeof(struct ti_i2c_image_header)));
+		header->CheckSum = cs;
+
+		/* Download the operational code  */
+		dev_dbg(dev, "%s - Downloading operational code image version %d.%d (TI UMP)\n",
+				__func__,
+				fw_hdr->major_version, fw_hdr->minor_version);
+		status = download_code(serial, buffer, buffer_size);
+
+		kfree(buffer);
+
+		if (status) {
+			dev_dbg(dev, "%s - Error downloading operational code image\n", __func__);
+			return status;
+		}
+
+		/* Device will reboot */
+		serial->product_info.TiMode = TI_MODE_TRANSITIONING;
+
+		dev_dbg(dev, "%s - Download successful -- Device rebooting...\n", __func__);
+
+		return 1;
+	}
+
+stayinbootmode:
+	/* Eprom is invalid or blank stay in boot mode */
+	dev_dbg(dev, "%s - STAYING IN BOOT MODE\n", __func__);
+	serial->product_info.TiMode = TI_MODE_BOOT;
+
+	return 1;
+}
+
+static int ti_do_config(struct edgeport_port *port, int feature, int on)
+{
+	on = !!on;	/* 1 or 0 not bitmask */
+
+	return send_port_cmd(port->port, feature, on, NULL, 0);
+}
+
+static int restore_mcr(struct edgeport_port *port, u8 mcr)
+{
+	int status = 0;
+
+	dev_dbg(&port->port->dev, "%s - %x\n", __func__, mcr);
+
+	status = ti_do_config(port, UMPC_SET_CLR_DTR, mcr & MCR_DTR);
+	if (status)
+		return status;
+	status = ti_do_config(port, UMPC_SET_CLR_RTS, mcr & MCR_RTS);
+	if (status)
+		return status;
+	return ti_do_config(port, UMPC_SET_CLR_LOOPBACK, mcr & MCR_LOOPBACK);
+}
+
+/* Convert TI LSR to standard UART flags */
+static u8 map_line_status(u8 ti_lsr)
+{
+	u8 lsr = 0;
+
+#define MAP_FLAG(flagUmp, flagUart)    \
+	if (ti_lsr & flagUmp) \
+		lsr |= flagUart;
+
+	MAP_FLAG(UMP_UART_LSR_OV_MASK, LSR_OVER_ERR)	/* overrun */
+	MAP_FLAG(UMP_UART_LSR_PE_MASK, LSR_PAR_ERR)	/* parity error */
+	MAP_FLAG(UMP_UART_LSR_FE_MASK, LSR_FRM_ERR)	/* framing error */
+	MAP_FLAG(UMP_UART_LSR_BR_MASK, LSR_BREAK)	/* break detected */
+	MAP_FLAG(UMP_UART_LSR_RX_MASK, LSR_RX_AVAIL)	/* rx data available */
+	MAP_FLAG(UMP_UART_LSR_TX_MASK, LSR_TX_EMPTY)	/* tx hold reg empty */
+
+#undef MAP_FLAG
+
+	return lsr;
+}
+
+static void handle_new_msr(struct edgeport_port *edge_port, u8 msr)
+{
+	struct async_icount *icount;
+	struct tty_struct *tty;
+
+	dev_dbg(&edge_port->port->dev, "%s - %02x\n", __func__, msr);
+
+	if (msr & (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 (msr & EDGEPORT_MSR_DELTA_CTS)
+			icount->cts++;
+		if (msr & EDGEPORT_MSR_DELTA_DSR)
+			icount->dsr++;
+		if (msr & EDGEPORT_MSR_DELTA_CD)
+			icount->dcd++;
+		if (msr & EDGEPORT_MSR_DELTA_RI)
+			icount->rng++;
+		wake_up_interruptible(&edge_port->port->port.delta_msr_wait);
+	}
+
+	/* Save the new modem status */
+	edge_port->shadow_msr = msr & 0xf0;
+
+	tty = tty_port_tty_get(&edge_port->port->port);
+	/* handle CTS flow control */
+	if (tty && C_CRTSCTS(tty)) {
+		if (msr & EDGEPORT_MSR_CTS)
+			tty_wakeup(tty);
+	}
+	tty_kref_put(tty);
+}
+
+static void handle_new_lsr(struct edgeport_port *edge_port, int lsr_data,
+							u8 lsr, u8 data)
+{
+	struct async_icount *icount;
+	u8 new_lsr = (u8)(lsr & (u8)(LSR_OVER_ERR | LSR_PAR_ERR |
+						LSR_FRM_ERR | LSR_BREAK));
+
+	dev_dbg(&edge_port->port->dev, "%s - %02x\n", __func__, new_lsr);
+
+	edge_port->shadow_lsr = lsr;
+
+	if (new_lsr & LSR_BREAK)
+		/*
+		 * Parity and Framing errors only count if they
+		 * occur exclusive of a break being received.
+		 */
+		new_lsr &= (u8)(LSR_OVER_ERR | LSR_BREAK);
+
+	/* Place LSR data byte into Rx buffer */
+	if (lsr_data)
+		edge_tty_recv(edge_port->port, &data, 1);
+
+	/* update input line counters */
+	icount = &edge_port->port->icount;
+	if (new_lsr & LSR_BREAK)
+		icount->brk++;
+	if (new_lsr & LSR_OVER_ERR)
+		icount->overrun++;
+	if (new_lsr & LSR_PAR_ERR)
+		icount->parity++;
+	if (new_lsr & LSR_FRM_ERR)
+		icount->frame++;
+}
+
+static void edge_interrupt_callback(struct urb *urb)
+{
+	struct edgeport_serial *edge_serial = urb->context;
+	struct usb_serial_port *port;
+	struct edgeport_port *edge_port;
+	struct device *dev;
+	unsigned char *data = urb->transfer_buffer;
+	int length = urb->actual_length;
+	int port_number;
+	int function;
+	int retval;
+	u8 lsr;
+	u8 msr;
+	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_err(&urb->dev->dev, "%s - nonzero urb status received: "
+			"%d\n", __func__, status);
+		goto exit;
+	}
+
+	if (!length) {
+		dev_dbg(&urb->dev->dev, "%s - no data in urb\n", __func__);
+		goto exit;
+	}
+
+	dev = &edge_serial->serial->dev->dev;
+	usb_serial_debug_data(dev, __func__, length, data);
+
+	if (length != 2) {
+		dev_dbg(dev, "%s - expecting packet of size 2, got %d\n", __func__, length);
+		goto exit;
+	}
+
+	port_number = TIUMP_GET_PORT_FROM_CODE(data[0]);
+	function    = TIUMP_GET_FUNC_FROM_CODE(data[0]);
+	dev_dbg(dev, "%s - port_number %d, function %d, info 0x%x\n", __func__,
+		port_number, function, data[1]);
+
+	if (port_number >= edge_serial->serial->num_ports) {
+		dev_err(dev, "bad port number %d\n", port_number);
+		goto exit;
+	}
+
+	port = edge_serial->serial->port[port_number];
+	edge_port = usb_get_serial_port_data(port);
+	if (!edge_port) {
+		dev_dbg(dev, "%s - edge_port not found\n", __func__);
+		return;
+	}
+	switch (function) {
+	case TIUMP_INTERRUPT_CODE_LSR:
+		lsr = map_line_status(data[1]);
+		if (lsr & UMP_UART_LSR_DATA_MASK) {
+			/*
+			 * Save the LSR event for bulk read completion routine
+			 */
+			dev_dbg(dev, "%s - LSR Event Port %u LSR Status = %02x\n",
+				__func__, port_number, lsr);
+			edge_port->lsr_event = 1;
+			edge_port->lsr_mask = lsr;
+		} else {
+			dev_dbg(dev, "%s - ===== Port %d LSR Status = %02x ======\n",
+				__func__, port_number, lsr);
+			handle_new_lsr(edge_port, 0, lsr, 0);
+		}
+		break;
+
+	case TIUMP_INTERRUPT_CODE_MSR:	/* MSR */
+		/* Copy MSR from UMP */
+		msr = data[1];
+		dev_dbg(dev, "%s - ===== Port %u MSR Status = %02x ======\n",
+			__func__, port_number, msr);
+		handle_new_msr(edge_port, msr);
+		break;
+
+	default:
+		dev_err(&urb->dev->dev,
+			"%s - Unknown Interrupt code from UMP %x\n",
+			__func__, data[1]);
+		break;
+
+	}
+
+exit:
+	retval = usb_submit_urb(urb, GFP_ATOMIC);
+	if (retval)
+		dev_err(&urb->dev->dev,
+			"%s - usb_submit_urb failed with result %d\n",
+			 __func__, retval);
+}
+
+static void edge_bulk_in_callback(struct urb *urb)
+{
+	struct edgeport_port *edge_port = urb->context;
+	struct device *dev = &edge_port->port->dev;
+	unsigned char *data = urb->transfer_buffer;
+	unsigned long flags;
+	int retval = 0;
+	int port_number;
+	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_err(&urb->dev->dev, "%s - nonzero read bulk status received: %d\n", __func__, status);
+	}
+
+	if (status == -EPIPE)
+		goto exit;
+
+	if (status) {
+		dev_err(&urb->dev->dev, "%s - stopping read!\n", __func__);
+		return;
+	}
+
+	port_number = edge_port->port->port_number;
+
+	if (urb->actual_length > 0 && edge_port->lsr_event) {
+		edge_port->lsr_event = 0;
+		dev_dbg(dev, "%s ===== Port %u LSR Status = %02x, Data = %02x ======\n",
+			__func__, port_number, edge_port->lsr_mask, *data);
+		handle_new_lsr(edge_port, 1, edge_port->lsr_mask, *data);
+		/* Adjust buffer length/pointer */
+		--urb->actual_length;
+		++data;
+	}
+
+	if (urb->actual_length) {
+		usb_serial_debug_data(dev, __func__, urb->actual_length, data);
+		if (edge_port->close_pending)
+			dev_dbg(dev, "%s - close pending, dropping data on the floor\n",
+								__func__);
+		else
+			edge_tty_recv(edge_port->port, data,
+					urb->actual_length);
+		edge_port->port->icount.rx += urb->actual_length;
+	}
+
+exit:
+	/* continue read unless stopped */
+	spin_lock_irqsave(&edge_port->ep_lock, flags);
+	if (edge_port->ep_read_urb_state == EDGE_READ_URB_RUNNING)
+		retval = usb_submit_urb(urb, GFP_ATOMIC);
+	else if (edge_port->ep_read_urb_state == EDGE_READ_URB_STOPPING)
+		edge_port->ep_read_urb_state = EDGE_READ_URB_STOPPED;
+
+	spin_unlock_irqrestore(&edge_port->ep_lock, flags);
+	if (retval)
+		dev_err(dev, "%s - usb_submit_urb failed with result %d\n", __func__, retval);
+}
+
+static void edge_tty_recv(struct usb_serial_port *port, unsigned char *data,
+		int length)
+{
+	int queued;
+
+	queued = tty_insert_flip_string(&port->port, data, length);
+	if (queued < length)
+		dev_err(&port->dev, "%s - dropping data, %d bytes lost\n",
+			__func__, length - queued);
+	tty_flip_buffer_push(&port->port);
+}
+
+static void edge_bulk_out_callback(struct urb *urb)
+{
+	struct usb_serial_port *port = urb->context;
+	struct edgeport_port *edge_port = usb_get_serial_port_data(port);
+	int status = urb->status;
+	struct tty_struct *tty;
+
+	edge_port->ep_write_urb_in_use = 0;
+
+	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_err_console(port, "%s - nonzero write bulk status "
+			"received: %d\n", __func__, status);
+	}
+
+	/* send any buffered data */
+	tty = tty_port_tty_get(&port->port);
+	edge_send(port, tty);
+	tty_kref_put(tty);
+}
+
+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 edgeport_serial *edge_serial;
+	struct usb_device *dev;
+	struct urb *urb;
+	int status;
+	u16 open_settings;
+	u8 transaction_timeout;
+
+	if (edge_port == NULL)
+		return -ENODEV;
+
+	dev = port->serial->dev;
+
+	/* turn off loopback */
+	status = ti_do_config(edge_port, UMPC_SET_CLR_LOOPBACK, 0);
+	if (status) {
+		dev_err(&port->dev,
+				"%s - cannot send clear loopback command, %d\n",
+			__func__, status);
+		return status;
+	}
+
+	/* set up the port settings */
+	if (tty)
+		edge_set_termios(tty, port, &tty->termios);
+
+	/* open up the port */
+
+	/* milliseconds to timeout for DMA transfer */
+	transaction_timeout = 2;
+
+	edge_port->ump_read_timeout =
+				max(20, ((transaction_timeout * 3) / 2));
+
+	/* milliseconds to timeout for DMA transfer */
+	open_settings = (u8)(UMP_DMA_MODE_CONTINOUS |
+			     UMP_PIPE_TRANS_TIMEOUT_ENA |
+			     (transaction_timeout << 2));
+
+	dev_dbg(&port->dev, "%s - Sending UMPC_OPEN_PORT\n", __func__);
+
+	/* Tell TI to open and start the port */
+	status = send_port_cmd(port, UMPC_OPEN_PORT, open_settings, NULL, 0);
+	if (status) {
+		dev_err(&port->dev, "%s - cannot send open command, %d\n",
+							__func__, status);
+		return status;
+	}
+
+	/* Start the DMA? */
+	status = send_port_cmd(port, UMPC_START_PORT, 0, NULL, 0);
+	if (status) {
+		dev_err(&port->dev, "%s - cannot send start DMA command, %d\n",
+							__func__, status);
+		return status;
+	}
+
+	/* Clear TX and RX buffers in UMP */
+	status = purge_port(port, UMP_PORT_DIR_OUT | UMP_PORT_DIR_IN);
+	if (status) {
+		dev_err(&port->dev,
+			"%s - cannot send clear buffers command, %d\n",
+			__func__, status);
+		return status;
+	}
+
+	/* Read Initial MSR */
+	status = read_port_cmd(port, UMPC_READ_MSR, 0, &edge_port->shadow_msr, 1);
+	if (status) {
+		dev_err(&port->dev, "%s - cannot send read MSR command, %d\n",
+							__func__, status);
+		return status;
+	}
+
+	dev_dbg(&port->dev, "ShadowMSR 0x%X\n", edge_port->shadow_msr);
+
+	/* Set Initial MCR */
+	edge_port->shadow_mcr = MCR_RTS | MCR_DTR;
+	dev_dbg(&port->dev, "ShadowMCR 0x%X\n", edge_port->shadow_mcr);
+
+	edge_serial = edge_port->edge_serial;
+	if (mutex_lock_interruptible(&edge_serial->es_lock))
+		return -ERESTARTSYS;
+	if (edge_serial->num_ports_open == 0) {
+		/* we are the first port to open, post the interrupt urb */
+		urb = edge_serial->serial->port[0]->interrupt_in_urb;
+		urb->context = edge_serial;
+		status = usb_submit_urb(urb, GFP_KERNEL);
+		if (status) {
+			dev_err(&port->dev,
+				"%s - usb_submit_urb failed with value %d\n",
+					__func__, status);
+			goto release_es_lock;
+		}
+	}
+
+	/*
+	 * reset the data toggle on the bulk endpoints to work around bug in
+	 * host controllers where things get out of sync some times
+	 */
+	usb_clear_halt(dev, port->write_urb->pipe);
+	usb_clear_halt(dev, port->read_urb->pipe);
+
+	/* start up our bulk read urb */
+	urb = port->read_urb;
+	edge_port->ep_read_urb_state = EDGE_READ_URB_RUNNING;
+	urb->context = edge_port;
+	status = usb_submit_urb(urb, GFP_KERNEL);
+	if (status) {
+		dev_err(&port->dev,
+			"%s - read bulk usb_submit_urb failed with value %d\n",
+				__func__, status);
+		goto unlink_int_urb;
+	}
+
+	++edge_serial->num_ports_open;
+
+	goto release_es_lock;
+
+unlink_int_urb:
+	if (edge_port->edge_serial->num_ports_open == 0)
+		usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
+release_es_lock:
+	mutex_unlock(&edge_serial->es_lock);
+	return status;
+}
+
+static void edge_close(struct usb_serial_port *port)
+{
+	struct edgeport_serial *edge_serial;
+	struct edgeport_port *edge_port;
+	unsigned long flags;
+
+	edge_serial = usb_get_serial_data(port->serial);
+	edge_port = usb_get_serial_port_data(port);
+	if (edge_serial == NULL || edge_port == NULL)
+		return;
+
+	/*
+	 * The bulkreadcompletion routine will check
+	 * this flag and dump add read data
+	 */
+	edge_port->close_pending = 1;
+
+	usb_kill_urb(port->read_urb);
+	usb_kill_urb(port->write_urb);
+	edge_port->ep_write_urb_in_use = 0;
+	spin_lock_irqsave(&edge_port->ep_lock, flags);
+	kfifo_reset_out(&port->write_fifo);
+	spin_unlock_irqrestore(&edge_port->ep_lock, flags);
+
+	dev_dbg(&port->dev, "%s - send umpc_close_port\n", __func__);
+	send_port_cmd(port, UMPC_CLOSE_PORT, 0, NULL, 0);
+
+	mutex_lock(&edge_serial->es_lock);
+	--edge_port->edge_serial->num_ports_open;
+	if (edge_port->edge_serial->num_ports_open <= 0) {
+		/* last port is now closed, let's shut down our interrupt urb */
+		usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
+		edge_port->edge_serial->num_ports_open = 0;
+	}
+	mutex_unlock(&edge_serial->es_lock);
+	edge_port->close_pending = 0;
+}
+
+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);
+
+	if (count == 0) {
+		dev_dbg(&port->dev, "%s - write request of 0 bytes\n", __func__);
+		return 0;
+	}
+
+	if (edge_port == NULL)
+		return -ENODEV;
+	if (edge_port->close_pending == 1)
+		return -ENODEV;
+
+	count = kfifo_in_locked(&port->write_fifo, data, count,
+							&edge_port->ep_lock);
+	edge_send(port, tty);
+
+	return count;
+}
+
+static void edge_send(struct usb_serial_port *port, struct tty_struct *tty)
+{
+	int count, result;
+	struct edgeport_port *edge_port = usb_get_serial_port_data(port);
+	unsigned long flags;
+
+	spin_lock_irqsave(&edge_port->ep_lock, flags);
+
+	if (edge_port->ep_write_urb_in_use) {
+		spin_unlock_irqrestore(&edge_port->ep_lock, flags);
+		return;
+	}
+
+	count = kfifo_out(&port->write_fifo,
+				port->write_urb->transfer_buffer,
+				port->bulk_out_size);
+
+	if (count == 0) {
+		spin_unlock_irqrestore(&edge_port->ep_lock, flags);
+		return;
+	}
+
+	edge_port->ep_write_urb_in_use = 1;
+
+	spin_unlock_irqrestore(&edge_port->ep_lock, flags);
+
+	usb_serial_debug_data(&port->dev, __func__, count, port->write_urb->transfer_buffer);
+
+	/* set up our urb */
+	port->write_urb->transfer_buffer_length = count;
+
+	/* send the data out the bulk port */
+	result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
+	if (result) {
+		dev_err_console(port,
+			"%s - failed submitting write urb, error %d\n",
+				__func__, result);
+		edge_port->ep_write_urb_in_use = 0;
+		/* TODO: reschedule edge_send */
+	} else
+		edge_port->port->icount.tx += count;
+
+	/*
+	 * wakeup any process waiting for writes to complete
+	 * there is now more room in the buffer for new writes
+	 */
+	if (tty)
+		tty_wakeup(tty);
+}
+
+static unsigned 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);
+	unsigned int room;
+	unsigned long flags;
+
+	if (edge_port == NULL)
+		return 0;
+	if (edge_port->close_pending == 1)
+		return 0;
+
+	spin_lock_irqsave(&edge_port->ep_lock, flags);
+	room = kfifo_avail(&port->write_fifo);
+	spin_unlock_irqrestore(&edge_port->ep_lock, flags);
+
+	dev_dbg(&port->dev, "%s - returns %u\n", __func__, room);
+	return room;
+}
+
+static unsigned 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);
+	unsigned int chars;
+	unsigned long flags;
+	if (edge_port == NULL)
+		return 0;
+
+	spin_lock_irqsave(&edge_port->ep_lock, flags);
+	chars = kfifo_len(&port->write_fifo);
+	spin_unlock_irqrestore(&edge_port->ep_lock, flags);
+
+	dev_dbg(&port->dev, "%s - returns %u\n", __func__, chars);
+	return chars;
+}
+
+static bool edge_tx_empty(struct usb_serial_port *port)
+{
+	struct edgeport_port *edge_port = usb_get_serial_port_data(port);
+	int ret;
+
+	ret = tx_active(edge_port);
+	if (ret > 0)
+		return false;
+
+	return true;
+}
+
+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 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) {
+			dev_err(&port->dev, "%s - failed to write stop character, %d\n", __func__, status);
+		}
+	}
+
+	/*
+	 * if we are implementing RTS/CTS, stop reads
+	 * and the Edgeport will clear the RTS line
+	 */
+	if (C_CRTSCTS(tty))
+		stop_read(edge_port);
+
+}
+
+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 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) {
+			dev_err(&port->dev, "%s - failed to write start character, %d\n", __func__, status);
+		}
+	}
+	/*
+	 * if we are implementing RTS/CTS, restart reads
+	 * are the Edgeport will assert the RTS line
+	 */
+	if (C_CRTSCTS(tty)) {
+		status = restart_read(edge_port);
+		if (status)
+			dev_err(&port->dev,
+				"%s - read bulk usb_submit_urb failed: %d\n",
+							__func__, status);
+	}
+
+}
+
+static void stop_read(struct edgeport_port *edge_port)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&edge_port->ep_lock, flags);
+
+	if (edge_port->ep_read_urb_state == EDGE_READ_URB_RUNNING)
+		edge_port->ep_read_urb_state = EDGE_READ_URB_STOPPING;
+	edge_port->shadow_mcr &= ~MCR_RTS;
+
+	spin_unlock_irqrestore(&edge_port->ep_lock, flags);
+}
+
+static int restart_read(struct edgeport_port *edge_port)
+{
+	struct urb *urb;
+	int status = 0;
+	unsigned long flags;
+
+	spin_lock_irqsave(&edge_port->ep_lock, flags);
+
+	if (edge_port->ep_read_urb_state == EDGE_READ_URB_STOPPED) {
+		urb = edge_port->port->read_urb;
+		status = usb_submit_urb(urb, GFP_ATOMIC);
+	}
+	edge_port->ep_read_urb_state = EDGE_READ_URB_RUNNING;
+	edge_port->shadow_mcr |= MCR_RTS;
+
+	spin_unlock_irqrestore(&edge_port->ep_lock, flags);
+
+	return status;
+}
+
+static void change_port_settings(struct tty_struct *tty,
+		struct edgeport_port *edge_port, const struct ktermios *old_termios)
+{
+	struct device *dev = &edge_port->port->dev;
+	struct ump_uart_config *config;
+	int baud;
+	unsigned cflag;
+	int status;
+
+	config = kmalloc (sizeof (*config), GFP_KERNEL);
+	if (!config) {
+		tty->termios = *old_termios;
+		return;
+	}
+
+	cflag = tty->termios.c_cflag;
+
+	config->wFlags = 0;
+
+	/* These flags must be set */
+	config->wFlags |= UMP_MASK_UART_FLAGS_RECEIVE_MS_INT;
+	config->wFlags |= UMP_MASK_UART_FLAGS_AUTO_START_ON_ERR;
+	config->bUartMode = (u8)(edge_port->bUartMode);
+
+	switch (cflag & CSIZE) {
+	case CS5:
+		    config->bDataBits = UMP_UART_CHAR5BITS;
+		    dev_dbg(dev, "%s - data bits = 5\n", __func__);
+		    break;
+	case CS6:
+		    config->bDataBits = UMP_UART_CHAR6BITS;
+		    dev_dbg(dev, "%s - data bits = 6\n", __func__);
+		    break;
+	case CS7:
+		    config->bDataBits = UMP_UART_CHAR7BITS;
+		    dev_dbg(dev, "%s - data bits = 7\n", __func__);
+		    break;
+	default:
+	case CS8:
+		    config->bDataBits = UMP_UART_CHAR8BITS;
+		    dev_dbg(dev, "%s - data bits = 8\n", __func__);
+			    break;
+	}
+
+	if (cflag & PARENB) {
+		if (cflag & PARODD) {
+			config->wFlags |= UMP_MASK_UART_FLAGS_PARITY;
+			config->bParity = UMP_UART_ODDPARITY;
+			dev_dbg(dev, "%s - parity = odd\n", __func__);
+		} else {
+			config->wFlags |= UMP_MASK_UART_FLAGS_PARITY;
+			config->bParity = UMP_UART_EVENPARITY;
+			dev_dbg(dev, "%s - parity = even\n", __func__);
+		}
+	} else {
+		config->bParity = UMP_UART_NOPARITY;
+		dev_dbg(dev, "%s - parity = none\n", __func__);
+	}
+
+	if (cflag & CSTOPB) {
+		config->bStopBits = UMP_UART_STOPBIT2;
+		dev_dbg(dev, "%s - stop bits = 2\n", __func__);
+	} else {
+		config->bStopBits = UMP_UART_STOPBIT1;
+		dev_dbg(dev, "%s - stop bits = 1\n", __func__);
+	}
+
+	/* figure out the flow control settings */
+	if (cflag & CRTSCTS) {
+		config->wFlags |= UMP_MASK_UART_FLAGS_OUT_X_CTS_FLOW;
+		config->wFlags |= UMP_MASK_UART_FLAGS_RTS_FLOW;
+		dev_dbg(dev, "%s - RTS/CTS is enabled\n", __func__);
+	} else {
+		dev_dbg(dev, "%s - RTS/CTS is disabled\n", __func__);
+		restart_read(edge_port);
+	}
+
+	/*
+	 * if we are implementing XON/XOFF, set the start and stop
+	 * character in the device
+	 */
+	config->cXon  = START_CHAR(tty);
+	config->cXoff = STOP_CHAR(tty);
+
+	/* if we are implementing INBOUND XON/XOFF */
+	if (I_IXOFF(tty)) {
+		config->wFlags |= UMP_MASK_UART_FLAGS_IN_X;
+		dev_dbg(dev, "%s - INBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x\n",
+			__func__, config->cXon, config->cXoff);
+	} else
+		dev_dbg(dev, "%s - INBOUND XON/XOFF is disabled\n", __func__);
+
+	/* if we are implementing OUTBOUND XON/XOFF */
+	if (I_IXON(tty)) {
+		config->wFlags |= UMP_MASK_UART_FLAGS_OUT_X;
+		dev_dbg(dev, "%s - OUTBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x\n",
+			__func__, config->cXon, config->cXoff);
+	} else
+		dev_dbg(dev, "%s - OUTBOUND XON/XOFF is disabled\n", __func__);
+
+	tty->termios.c_cflag &= ~CMSPAR;
+
+	/* Round the baud rate */
+	baud = tty_get_baud_rate(tty);
+	if (!baud) {
+		/* pick a default, any default... */
+		baud = 9600;
+	} else {
+		/* Avoid a zero divisor. */
+		baud = min(baud, 461550);
+		tty_encode_baud_rate(tty, baud, baud);
+	}
+
+	edge_port->baud_rate = baud;
+	config->wBaudRate = (u16)((461550L + baud/2) / baud);
+
+	/* FIXME: Recompute actual baud from divisor here */
+
+	dev_dbg(dev, "%s - baud rate = %d, wBaudRate = %d\n", __func__, baud, config->wBaudRate);
+
+	dev_dbg(dev, "wBaudRate:   %d\n", (int)(461550L / config->wBaudRate));
+	dev_dbg(dev, "wFlags:    0x%x\n", config->wFlags);
+	dev_dbg(dev, "bDataBits:   %d\n", config->bDataBits);
+	dev_dbg(dev, "bParity:     %d\n", config->bParity);
+	dev_dbg(dev, "bStopBits:   %d\n", config->bStopBits);
+	dev_dbg(dev, "cXon:        %d\n", config->cXon);
+	dev_dbg(dev, "cXoff:       %d\n", config->cXoff);
+	dev_dbg(dev, "bUartMode:   %d\n", config->bUartMode);
+
+	/* move the word values into big endian mode */
+	cpu_to_be16s(&config->wFlags);
+	cpu_to_be16s(&config->wBaudRate);
+
+	status = send_port_cmd(edge_port->port, UMPC_SET_CONFIG, 0, config,
+			sizeof(*config));
+	if (status)
+		dev_dbg(dev, "%s - error %d when trying to write config to device\n",
+			__func__, status);
+	kfree(config);
+}
+
+static void edge_set_termios(struct tty_struct *tty,
+			     struct usb_serial_port *port,
+			     const struct ktermios *old_termios)
+{
+	struct edgeport_port *edge_port = usb_get_serial_port_data(port);
+
+	if (edge_port == NULL)
+		return;
+	/* change the port settings to the new ones specified */
+	change_port_settings(tty, edge_port, old_termios);
+}
+
+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;
+	unsigned long flags;
+
+	spin_lock_irqsave(&edge_port->ep_lock, flags);
+	mcr = edge_port->shadow_mcr;
+	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->shadow_mcr = mcr;
+	spin_unlock_irqrestore(&edge_port->ep_lock, flags);
+
+	restore_mcr(edge_port, mcr);
+	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;
+	unsigned long flags;
+
+	spin_lock_irqsave(&edge_port->ep_lock, flags);
+
+	msr = edge_port->shadow_msr;
+	mcr = edge_port->shadow_mcr;
+	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 */
+
+
+	dev_dbg(&port->dev, "%s -- %x\n", __func__, result);
+	spin_unlock_irqrestore(&edge_port->ep_lock, flags);
+
+	return result;
+}
+
+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);
+	int status;
+	int bv = 0;	/* Off */
+
+	if (break_state == -1)
+		bv = 1;	/* On */
+	status = ti_do_config(edge_port, UMPC_SET_CLR_BREAK, bv);
+	if (status)
+		dev_dbg(&port->dev, "%s - error %d sending break set/clear command.\n",
+			__func__, status);
+}
+
+static void edge_heartbeat_schedule(struct edgeport_serial *edge_serial)
+{
+	if (!edge_serial->use_heartbeat)
+		return;
+
+	schedule_delayed_work(&edge_serial->heartbeat_work,
+			FW_HEARTBEAT_SECS * HZ);
+}
+
+static void edge_heartbeat_work(struct work_struct *work)
+{
+	struct edgeport_serial *serial;
+	struct ti_i2c_desc *rom_desc;
+
+	serial = container_of(work, struct edgeport_serial,
+			heartbeat_work.work);
+
+	rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL);
+
+	/* Descriptor address request is enough to reset the firmware timer */
+	if (!rom_desc || !get_descriptor_addr(serial, I2C_DESC_TYPE_ION,
+			rom_desc)) {
+		dev_err(&serial->serial->interface->dev,
+				"%s - Incomplete heartbeat\n", __func__);
+	}
+	kfree(rom_desc);
+
+	edge_heartbeat_schedule(serial);
+}
+
+static int edge_calc_num_ports(struct usb_serial *serial,
+				struct usb_serial_endpoints *epds)
+{
+	struct device *dev = &serial->interface->dev;
+	unsigned char num_ports = serial->type->num_ports;
+
+	/* Make sure we have the required endpoints when in download mode. */
+	if (serial->interface->cur_altsetting->desc.bNumEndpoints > 1) {
+		if (epds->num_bulk_in < num_ports ||
+				epds->num_bulk_out < num_ports ||
+				epds->num_interrupt_in < 1) {
+			dev_err(dev, "required endpoints missing\n");
+			return -ENODEV;
+		}
+	}
+
+	return num_ports;
+}
+
+static int edge_startup(struct usb_serial *serial)
+{
+	struct edgeport_serial *edge_serial;
+	int status;
+	u16 product_id;
+
+	/* create our private serial structure */
+	edge_serial = kzalloc(sizeof(struct edgeport_serial), GFP_KERNEL);
+	if (!edge_serial)
+		return -ENOMEM;
+
+	mutex_init(&edge_serial->es_lock);
+	edge_serial->serial = serial;
+	INIT_DELAYED_WORK(&edge_serial->heartbeat_work, edge_heartbeat_work);
+	usb_set_serial_data(serial, edge_serial);
+
+	status = download_fw(edge_serial);
+	if (status < 0) {
+		kfree(edge_serial);
+		return status;
+	}
+
+	if (status > 0)
+		return 1;	/* bind but do not register any ports */
+
+	product_id = le16_to_cpu(
+			edge_serial->serial->dev->descriptor.idProduct);
+
+	/* Currently only the EP/416 models require heartbeat support */
+	if (edge_serial->fw_version > FW_HEARTBEAT_VERSION_CUTOFF) {
+		if (product_id == ION_DEVICE_ID_TI_EDGEPORT_416 ||
+			product_id == ION_DEVICE_ID_TI_EDGEPORT_416B) {
+			edge_serial->use_heartbeat = true;
+		}
+	}
+
+	edge_heartbeat_schedule(edge_serial);
+
+	return 0;
+}
+
+static void edge_disconnect(struct usb_serial *serial)
+{
+	struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
+
+	cancel_delayed_work_sync(&edge_serial->heartbeat_work);
+}
+
+static void edge_release(struct usb_serial *serial)
+{
+	struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
+
+	cancel_delayed_work_sync(&edge_serial->heartbeat_work);
+	kfree(edge_serial);
+}
+
+static int edge_port_probe(struct usb_serial_port *port)
+{
+	struct edgeport_port *edge_port;
+	int ret;
+
+	edge_port = kzalloc(sizeof(*edge_port), GFP_KERNEL);
+	if (!edge_port)
+		return -ENOMEM;
+
+	spin_lock_init(&edge_port->ep_lock);
+	edge_port->port = port;
+	edge_port->edge_serial = usb_get_serial_data(port->serial);
+	edge_port->bUartMode = default_uart_mode;
+
+	switch (port->port_number) {
+	case 0:
+		edge_port->uart_base = UMPMEM_BASE_UART1;
+		edge_port->dma_address = UMPD_OEDB1_ADDRESS;
+		break;
+	case 1:
+		edge_port->uart_base = UMPMEM_BASE_UART2;
+		edge_port->dma_address = UMPD_OEDB2_ADDRESS;
+		break;
+	default:
+		dev_err(&port->dev, "unknown port number\n");
+		ret = -ENODEV;
+		goto err;
+	}
+
+	dev_dbg(&port->dev,
+		"%s - port_number = %d, uart_base = %04x, dma_address = %04x\n",
+		__func__, port->port_number, edge_port->uart_base,
+		edge_port->dma_address);
+
+	usb_set_serial_port_data(port, edge_port);
+
+	ret = edge_create_sysfs_attrs(port);
+	if (ret)
+		goto err;
+
+	/*
+	 * The LSR does not tell when the transmitter shift register has
+	 * emptied so add a one-character drain delay.
+	 */
+	port->port.drain_delay = 1;
+
+	return 0;
+err:
+	kfree(edge_port);
+
+	return ret;
+}
+
+static void edge_port_remove(struct usb_serial_port *port)
+{
+	struct edgeport_port *edge_port;
+
+	edge_port = usb_get_serial_port_data(port);
+	edge_remove_sysfs_attrs(port);
+	kfree(edge_port);
+}
+
+/* Sysfs Attributes */
+
+static ssize_t uart_mode_show(struct device *dev,
+	struct device_attribute *attr, char *buf)
+{
+	struct usb_serial_port *port = to_usb_serial_port(dev);
+	struct edgeport_port *edge_port = usb_get_serial_port_data(port);
+
+	return sprintf(buf, "%d\n", edge_port->bUartMode);
+}
+
+static ssize_t uart_mode_store(struct device *dev,
+	struct device_attribute *attr, const char *valbuf, size_t count)
+{
+	struct usb_serial_port *port = to_usb_serial_port(dev);
+	struct edgeport_port *edge_port = usb_get_serial_port_data(port);
+	unsigned int v = simple_strtoul(valbuf, NULL, 0);
+
+	dev_dbg(dev, "%s: setting uart_mode = %d\n", __func__, v);
+
+	if (v < 256)
+		edge_port->bUartMode = v;
+	else
+		dev_err(dev, "%s - uart_mode %d is invalid\n", __func__, v);
+
+	return count;
+}
+static DEVICE_ATTR_RW(uart_mode);
+
+static int edge_create_sysfs_attrs(struct usb_serial_port *port)
+{
+	return device_create_file(&port->dev, &dev_attr_uart_mode);
+}
+
+static int edge_remove_sysfs_attrs(struct usb_serial_port *port)
+{
+	device_remove_file(&port->dev, &dev_attr_uart_mode);
+	return 0;
+}
+
+#ifdef CONFIG_PM
+static int edge_suspend(struct usb_serial *serial, pm_message_t message)
+{
+	struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
+
+	cancel_delayed_work_sync(&edge_serial->heartbeat_work);
+
+	return 0;
+}
+
+static int edge_resume(struct usb_serial *serial)
+{
+	struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
+
+	edge_heartbeat_schedule(edge_serial);
+
+	return 0;
+}
+#endif
+
+static struct usb_serial_driver edgeport_1port_device = {
+	.driver = {
+		.owner		= THIS_MODULE,
+		.name		= "edgeport_ti_1",
+	},
+	.description		= "Edgeport TI 1 port adapter",
+	.id_table		= edgeport_1port_id_table,
+	.num_ports		= 1,
+	.num_bulk_out		= 1,
+	.open			= edge_open,
+	.close			= edge_close,
+	.throttle		= edge_throttle,
+	.unthrottle		= edge_unthrottle,
+	.attach			= edge_startup,
+	.calc_num_ports		= edge_calc_num_ports,
+	.disconnect		= edge_disconnect,
+	.release		= edge_release,
+	.port_probe		= edge_port_probe,
+	.port_remove		= edge_port_remove,
+	.set_termios		= edge_set_termios,
+	.tiocmget		= edge_tiocmget,
+	.tiocmset		= edge_tiocmset,
+	.tiocmiwait		= usb_serial_generic_tiocmiwait,
+	.get_icount		= usb_serial_generic_get_icount,
+	.write			= edge_write,
+	.write_room		= edge_write_room,
+	.chars_in_buffer	= edge_chars_in_buffer,
+	.tx_empty		= edge_tx_empty,
+	.break_ctl		= edge_break,
+	.read_int_callback	= edge_interrupt_callback,
+	.read_bulk_callback	= edge_bulk_in_callback,
+	.write_bulk_callback	= edge_bulk_out_callback,
+#ifdef CONFIG_PM
+	.suspend		= edge_suspend,
+	.resume			= edge_resume,
+#endif
+};
+
+static struct usb_serial_driver edgeport_2port_device = {
+	.driver = {
+		.owner		= THIS_MODULE,
+		.name		= "edgeport_ti_2",
+	},
+	.description		= "Edgeport TI 2 port adapter",
+	.id_table		= edgeport_2port_id_table,
+	.num_ports		= 2,
+	.num_bulk_out		= 1,
+	.open			= edge_open,
+	.close			= edge_close,
+	.throttle		= edge_throttle,
+	.unthrottle		= edge_unthrottle,
+	.attach			= edge_startup,
+	.calc_num_ports		= edge_calc_num_ports,
+	.disconnect		= edge_disconnect,
+	.release		= edge_release,
+	.port_probe		= edge_port_probe,
+	.port_remove		= edge_port_remove,
+	.set_termios		= edge_set_termios,
+	.tiocmget		= edge_tiocmget,
+	.tiocmset		= edge_tiocmset,
+	.tiocmiwait		= usb_serial_generic_tiocmiwait,
+	.get_icount		= usb_serial_generic_get_icount,
+	.write			= edge_write,
+	.write_room		= edge_write_room,
+	.chars_in_buffer	= edge_chars_in_buffer,
+	.tx_empty		= edge_tx_empty,
+	.break_ctl		= edge_break,
+	.read_int_callback	= edge_interrupt_callback,
+	.read_bulk_callback	= edge_bulk_in_callback,
+	.write_bulk_callback	= edge_bulk_out_callback,
+#ifdef CONFIG_PM
+	.suspend		= edge_suspend,
+	.resume			= edge_resume,
+#endif
+};
+
+static struct usb_serial_driver * const serial_drivers[] = {
+	&edgeport_1port_device, &edgeport_2port_device, NULL
+};
+
+module_usb_serial_driver(serial_drivers, id_table_combined);
+
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE("GPL");
+MODULE_FIRMWARE("edgeport/down3.bin");
+
+module_param(ignore_cpu_rev, bool, 0644);
+MODULE_PARM_DESC(ignore_cpu_rev,
+			"Ignore the cpu revision when connecting to a device");
+
+module_param(default_uart_mode, int, 0644);
+MODULE_PARM_DESC(default_uart_mode, "Default uart_mode, 0=RS232, ...");