Adding upstream version 4.19.249.upstream/4.19.249

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

1 files changed, 3126 insertions, 0 deletions

diff --git a/drivers/usb/serial/keyspan.c b/drivers/usb/serial/keyspan.c
new file mode 100644
index 000000000..451759f38
--- /dev/null
+++ b/drivers/usb/serial/keyspan.c
@@ -0,0 +1,3126 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+  Keyspan USB to Serial Converter driver
+
+  (C) Copyright (C) 2000-2001	Hugh Blemings <hugh@blemings.org>
+  (C) Copyright (C) 2002	Greg Kroah-Hartman <greg@kroah.com>
+
+  See http://blemings.org/hugh/keyspan.html for more information.
+
+  Code in this driver inspired by and in a number of places taken
+  from Brian Warner's original Keyspan-PDA driver.
+
+  This driver has been put together with the support of Innosys, Inc.
+  and Keyspan, Inc the manufacturers of the Keyspan USB-serial products.
+  Thanks Guys :)
+
+  Thanks to Paulus for miscellaneous tidy ups, some largish chunks
+  of much nicer and/or completely new code and (perhaps most uniquely)
+  having the patience to sit down and explain why and where he'd changed
+  stuff.
+
+  Tip 'o the hat to IBM (and previously Linuxcare :) for supporting
+  staff in their work on open source projects.
+*/
+
+
+#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/uaccess.h>
+#include <linux/usb.h>
+#include <linux/usb/serial.h>
+#include <linux/usb/ezusb.h>
+
+#define DRIVER_AUTHOR "Hugh Blemings <hugh@misc.nu"
+#define DRIVER_DESC "Keyspan USB to Serial Converter Driver"
+
+/* Function prototypes for Keyspan serial converter */
+static int keyspan_open(struct tty_struct *tty, struct usb_serial_port *port);
+static void keyspan_close(struct usb_serial_port *port);
+static void keyspan_dtr_rts(struct usb_serial_port *port, int on);
+static int keyspan_startup(struct usb_serial *serial);
+static void keyspan_disconnect(struct usb_serial *serial);
+static void keyspan_release(struct usb_serial *serial);
+static int keyspan_port_probe(struct usb_serial_port *port);
+static int keyspan_port_remove(struct usb_serial_port *port);
+static int keyspan_write_room(struct tty_struct *tty);
+static int keyspan_write(struct tty_struct *tty, struct usb_serial_port *port,
+			 const unsigned char *buf, int count);
+static void keyspan_send_setup(struct usb_serial_port *port, int reset_port);
+static void keyspan_set_termios(struct tty_struct *tty,
+				struct usb_serial_port *port,
+				struct ktermios *old);
+static void keyspan_break_ctl(struct tty_struct *tty, int break_state);
+static int keyspan_tiocmget(struct tty_struct *tty);
+static int keyspan_tiocmset(struct tty_struct *tty, unsigned int set,
+			    unsigned int clear);
+static int keyspan_fake_startup(struct usb_serial *serial);
+
+static int keyspan_usa19_calc_baud(struct usb_serial_port *port,
+				   u32 baud_rate, u32 baudclk,
+				   u8 *rate_hi, u8 *rate_low,
+				   u8 *prescaler, int portnum);
+static int keyspan_usa19w_calc_baud(struct usb_serial_port *port,
+				    u32 baud_rate, u32 baudclk,
+				    u8 *rate_hi, u8 *rate_low,
+				    u8 *prescaler, int portnum);
+static int keyspan_usa28_calc_baud(struct usb_serial_port *port,
+				   u32 baud_rate, u32 baudclk,
+				   u8 *rate_hi, u8 *rate_low,
+				   u8 *prescaler, int portnum);
+static int keyspan_usa19hs_calc_baud(struct usb_serial_port *port,
+				     u32 baud_rate, u32 baudclk,
+				     u8 *rate_hi, u8 *rate_low,
+				     u8 *prescaler, int portnum);
+
+static int keyspan_usa28_send_setup(struct usb_serial *serial,
+				    struct usb_serial_port *port,
+				    int reset_port);
+static int keyspan_usa26_send_setup(struct usb_serial *serial,
+				    struct usb_serial_port *port,
+				    int reset_port);
+static int keyspan_usa49_send_setup(struct usb_serial *serial,
+				    struct usb_serial_port *port,
+				    int reset_port);
+static int keyspan_usa90_send_setup(struct usb_serial *serial,
+				    struct usb_serial_port *port,
+				    int reset_port);
+static int keyspan_usa67_send_setup(struct usb_serial *serial,
+				    struct usb_serial_port *port,
+				    int reset_port);
+
+/* Values used for baud rate calculation - device specific */
+#define KEYSPAN_INVALID_BAUD_RATE		(-1)
+#define KEYSPAN_BAUD_RATE_OK			(0)
+#define KEYSPAN_USA18X_BAUDCLK			(12000000L)	/* a guess */
+#define KEYSPAN_USA19_BAUDCLK			(12000000L)
+#define KEYSPAN_USA19W_BAUDCLK			(24000000L)
+#define KEYSPAN_USA19HS_BAUDCLK			(14769231L)
+#define KEYSPAN_USA28_BAUDCLK			(1843200L)
+#define KEYSPAN_USA28X_BAUDCLK			(12000000L)
+#define KEYSPAN_USA49W_BAUDCLK			(48000000L)
+
+/* Some constants used to characterise each device.  */
+#define KEYSPAN_MAX_NUM_PORTS			(4)
+#define KEYSPAN_MAX_FLIPS			(2)
+
+/*
+ * Device info for the Keyspan serial converter, used by the overall
+ * usb-serial probe function.
+ */
+#define KEYSPAN_VENDOR_ID			(0x06cd)
+
+/* Product IDs for the products supported, pre-renumeration */
+#define keyspan_usa18x_pre_product_id		0x0105
+#define keyspan_usa19_pre_product_id		0x0103
+#define keyspan_usa19qi_pre_product_id		0x010b
+#define keyspan_mpr_pre_product_id		0x011b
+#define keyspan_usa19qw_pre_product_id		0x0118
+#define keyspan_usa19w_pre_product_id		0x0106
+#define keyspan_usa28_pre_product_id		0x0101
+#define keyspan_usa28x_pre_product_id		0x0102
+#define keyspan_usa28xa_pre_product_id		0x0114
+#define keyspan_usa28xb_pre_product_id		0x0113
+#define keyspan_usa49w_pre_product_id		0x0109
+#define keyspan_usa49wlc_pre_product_id		0x011a
+
+/*
+ * Product IDs post-renumeration.  Note that the 28x and 28xb have the same
+ * id's post-renumeration but behave identically so it's not an issue. As
+ * such, the 28xb is not listed in any of the device tables.
+ */
+#define keyspan_usa18x_product_id		0x0112
+#define keyspan_usa19_product_id		0x0107
+#define keyspan_usa19qi_product_id		0x010c
+#define keyspan_usa19hs_product_id		0x0121
+#define keyspan_mpr_product_id			0x011c
+#define keyspan_usa19qw_product_id		0x0119
+#define keyspan_usa19w_product_id		0x0108
+#define keyspan_usa28_product_id		0x010f
+#define keyspan_usa28x_product_id		0x0110
+#define keyspan_usa28xa_product_id		0x0115
+#define keyspan_usa28xb_product_id		0x0110
+#define keyspan_usa28xg_product_id		0x0135
+#define keyspan_usa49w_product_id		0x010a
+#define keyspan_usa49wlc_product_id		0x012a
+#define keyspan_usa49wg_product_id		0x0131
+
+struct keyspan_device_details {
+	/* product ID value */
+	int	product_id;
+
+	enum	{msg_usa26, msg_usa28, msg_usa49, msg_usa90, msg_usa67} msg_format;
+
+		/* Number of physical ports */
+	int	num_ports;
+
+		/* 1 if endpoint flipping used on input, 0 if not */
+	int	indat_endp_flip;
+
+		/* 1 if endpoint flipping used on output, 0 if not */
+	int	outdat_endp_flip;
+
+		/*
+		 * Table mapping input data endpoint IDs to physical port
+		 * number and flip if used
+		 */
+	int	indat_endpoints[KEYSPAN_MAX_NUM_PORTS];
+
+		/* Same for output endpoints */
+	int	outdat_endpoints[KEYSPAN_MAX_NUM_PORTS];
+
+		/* Input acknowledge endpoints */
+	int	inack_endpoints[KEYSPAN_MAX_NUM_PORTS];
+
+		/* Output control endpoints */
+	int	outcont_endpoints[KEYSPAN_MAX_NUM_PORTS];
+
+		/* Endpoint used for input status */
+	int	instat_endpoint;
+
+		/* Endpoint used for input data 49WG only */
+	int	indat_endpoint;
+
+		/* Endpoint used for global control functions */
+	int	glocont_endpoint;
+
+	int	(*calculate_baud_rate)(struct usb_serial_port *port,
+				       u32 baud_rate, u32 baudclk,
+				       u8 *rate_hi, u8 *rate_low, u8 *prescaler,
+				       int portnum);
+	u32	baudclk;
+};
+
+/*
+ * Now for each device type we setup the device detail structure with the
+ * appropriate information (provided in Keyspan's documentation)
+ */
+
+static const struct keyspan_device_details usa18x_device_details = {
+	.product_id		= keyspan_usa18x_product_id,
+	.msg_format		= msg_usa26,
+	.num_ports		= 1,
+	.indat_endp_flip	= 0,
+	.outdat_endp_flip	= 1,
+	.indat_endpoints	= {0x81},
+	.outdat_endpoints	= {0x01},
+	.inack_endpoints	= {0x85},
+	.outcont_endpoints	= {0x05},
+	.instat_endpoint	= 0x87,
+	.indat_endpoint		= -1,
+	.glocont_endpoint	= 0x07,
+	.calculate_baud_rate	= keyspan_usa19w_calc_baud,
+	.baudclk		= KEYSPAN_USA18X_BAUDCLK,
+};
+
+static const struct keyspan_device_details usa19_device_details = {
+	.product_id		= keyspan_usa19_product_id,
+	.msg_format		= msg_usa28,
+	.num_ports		= 1,
+	.indat_endp_flip	= 1,
+	.outdat_endp_flip	= 1,
+	.indat_endpoints	= {0x81},
+	.outdat_endpoints	= {0x01},
+	.inack_endpoints	= {0x83},
+	.outcont_endpoints	= {0x03},
+	.instat_endpoint	= 0x84,
+	.indat_endpoint		= -1,
+	.glocont_endpoint	= -1,
+	.calculate_baud_rate	= keyspan_usa19_calc_baud,
+	.baudclk		= KEYSPAN_USA19_BAUDCLK,
+};
+
+static const struct keyspan_device_details usa19qi_device_details = {
+	.product_id		= keyspan_usa19qi_product_id,
+	.msg_format		= msg_usa28,
+	.num_ports		= 1,
+	.indat_endp_flip	= 1,
+	.outdat_endp_flip	= 1,
+	.indat_endpoints	= {0x81},
+	.outdat_endpoints	= {0x01},
+	.inack_endpoints	= {0x83},
+	.outcont_endpoints	= {0x03},
+	.instat_endpoint	= 0x84,
+	.indat_endpoint		= -1,
+	.glocont_endpoint	= -1,
+	.calculate_baud_rate	= keyspan_usa28_calc_baud,
+	.baudclk		= KEYSPAN_USA19_BAUDCLK,
+};
+
+static const struct keyspan_device_details mpr_device_details = {
+	.product_id		= keyspan_mpr_product_id,
+	.msg_format		= msg_usa28,
+	.num_ports		= 1,
+	.indat_endp_flip	= 1,
+	.outdat_endp_flip	= 1,
+	.indat_endpoints	= {0x81},
+	.outdat_endpoints	= {0x01},
+	.inack_endpoints	= {0x83},
+	.outcont_endpoints	= {0x03},
+	.instat_endpoint	= 0x84,
+	.indat_endpoint		= -1,
+	.glocont_endpoint	= -1,
+	.calculate_baud_rate	= keyspan_usa28_calc_baud,
+	.baudclk		= KEYSPAN_USA19_BAUDCLK,
+};
+
+static const struct keyspan_device_details usa19qw_device_details = {
+	.product_id		= keyspan_usa19qw_product_id,
+	.msg_format		= msg_usa26,
+	.num_ports		= 1,
+	.indat_endp_flip	= 0,
+	.outdat_endp_flip	= 1,
+	.indat_endpoints	= {0x81},
+	.outdat_endpoints	= {0x01},
+	.inack_endpoints	= {0x85},
+	.outcont_endpoints	= {0x05},
+	.instat_endpoint	= 0x87,
+	.indat_endpoint		= -1,
+	.glocont_endpoint	= 0x07,
+	.calculate_baud_rate	= keyspan_usa19w_calc_baud,
+	.baudclk		= KEYSPAN_USA19W_BAUDCLK,
+};
+
+static const struct keyspan_device_details usa19w_device_details = {
+	.product_id		= keyspan_usa19w_product_id,
+	.msg_format		= msg_usa26,
+	.num_ports		= 1,
+	.indat_endp_flip	= 0,
+	.outdat_endp_flip	= 1,
+	.indat_endpoints	= {0x81},
+	.outdat_endpoints	= {0x01},
+	.inack_endpoints	= {0x85},
+	.outcont_endpoints	= {0x05},
+	.instat_endpoint	= 0x87,
+	.indat_endpoint		= -1,
+	.glocont_endpoint	= 0x07,
+	.calculate_baud_rate	= keyspan_usa19w_calc_baud,
+	.baudclk		= KEYSPAN_USA19W_BAUDCLK,
+};
+
+static const struct keyspan_device_details usa19hs_device_details = {
+	.product_id		= keyspan_usa19hs_product_id,
+	.msg_format		= msg_usa90,
+	.num_ports		= 1,
+	.indat_endp_flip	= 0,
+	.outdat_endp_flip	= 0,
+	.indat_endpoints	= {0x81},
+	.outdat_endpoints	= {0x01},
+	.inack_endpoints	= {-1},
+	.outcont_endpoints	= {0x02},
+	.instat_endpoint	= 0x82,
+	.indat_endpoint		= -1,
+	.glocont_endpoint	= -1,
+	.calculate_baud_rate	= keyspan_usa19hs_calc_baud,
+	.baudclk		= KEYSPAN_USA19HS_BAUDCLK,
+};
+
+static const struct keyspan_device_details usa28_device_details = {
+	.product_id		= keyspan_usa28_product_id,
+	.msg_format		= msg_usa28,
+	.num_ports		= 2,
+	.indat_endp_flip	= 1,
+	.outdat_endp_flip	= 1,
+	.indat_endpoints	= {0x81, 0x83},
+	.outdat_endpoints	= {0x01, 0x03},
+	.inack_endpoints	= {0x85, 0x86},
+	.outcont_endpoints	= {0x05, 0x06},
+	.instat_endpoint	= 0x87,
+	.indat_endpoint		= -1,
+	.glocont_endpoint	= 0x07,
+	.calculate_baud_rate	= keyspan_usa28_calc_baud,
+	.baudclk		= KEYSPAN_USA28_BAUDCLK,
+};
+
+static const struct keyspan_device_details usa28x_device_details = {
+	.product_id		= keyspan_usa28x_product_id,
+	.msg_format		= msg_usa26,
+	.num_ports		= 2,
+	.indat_endp_flip	= 0,
+	.outdat_endp_flip	= 1,
+	.indat_endpoints	= {0x81, 0x83},
+	.outdat_endpoints	= {0x01, 0x03},
+	.inack_endpoints	= {0x85, 0x86},
+	.outcont_endpoints	= {0x05, 0x06},
+	.instat_endpoint	= 0x87,
+	.indat_endpoint		= -1,
+	.glocont_endpoint	= 0x07,
+	.calculate_baud_rate	= keyspan_usa19w_calc_baud,
+	.baudclk		= KEYSPAN_USA28X_BAUDCLK,
+};
+
+static const struct keyspan_device_details usa28xa_device_details = {
+	.product_id		= keyspan_usa28xa_product_id,
+	.msg_format		= msg_usa26,
+	.num_ports		= 2,
+	.indat_endp_flip	= 0,
+	.outdat_endp_flip	= 1,
+	.indat_endpoints	= {0x81, 0x83},
+	.outdat_endpoints	= {0x01, 0x03},
+	.inack_endpoints	= {0x85, 0x86},
+	.outcont_endpoints	= {0x05, 0x06},
+	.instat_endpoint	= 0x87,
+	.indat_endpoint		= -1,
+	.glocont_endpoint	= 0x07,
+	.calculate_baud_rate	= keyspan_usa19w_calc_baud,
+	.baudclk		= KEYSPAN_USA28X_BAUDCLK,
+};
+
+static const struct keyspan_device_details usa28xg_device_details = {
+	.product_id		= keyspan_usa28xg_product_id,
+	.msg_format		= msg_usa67,
+	.num_ports		= 2,
+	.indat_endp_flip	= 0,
+	.outdat_endp_flip	= 0,
+	.indat_endpoints	= {0x84, 0x88},
+	.outdat_endpoints	= {0x02, 0x06},
+	.inack_endpoints	= {-1, -1},
+	.outcont_endpoints	= {-1, -1},
+	.instat_endpoint	= 0x81,
+	.indat_endpoint		= -1,
+	.glocont_endpoint	= 0x01,
+	.calculate_baud_rate	= keyspan_usa19w_calc_baud,
+	.baudclk		= KEYSPAN_USA28X_BAUDCLK,
+};
+/*
+ * We don't need a separate entry for the usa28xb as it appears as a 28x
+ * anyway.
+ */
+
+static const struct keyspan_device_details usa49w_device_details = {
+	.product_id		= keyspan_usa49w_product_id,
+	.msg_format		= msg_usa49,
+	.num_ports		= 4,
+	.indat_endp_flip	= 0,
+	.outdat_endp_flip	= 0,
+	.indat_endpoints	= {0x81, 0x82, 0x83, 0x84},
+	.outdat_endpoints	= {0x01, 0x02, 0x03, 0x04},
+	.inack_endpoints	= {-1, -1, -1, -1},
+	.outcont_endpoints	= {-1, -1, -1, -1},
+	.instat_endpoint	= 0x87,
+	.indat_endpoint		= -1,
+	.glocont_endpoint	= 0x07,
+	.calculate_baud_rate	= keyspan_usa19w_calc_baud,
+	.baudclk		= KEYSPAN_USA49W_BAUDCLK,
+};
+
+static const struct keyspan_device_details usa49wlc_device_details = {
+	.product_id		= keyspan_usa49wlc_product_id,
+	.msg_format		= msg_usa49,
+	.num_ports		= 4,
+	.indat_endp_flip	= 0,
+	.outdat_endp_flip	= 0,
+	.indat_endpoints	= {0x81, 0x82, 0x83, 0x84},
+	.outdat_endpoints	= {0x01, 0x02, 0x03, 0x04},
+	.inack_endpoints	= {-1, -1, -1, -1},
+	.outcont_endpoints	= {-1, -1, -1, -1},
+	.instat_endpoint	= 0x87,
+	.indat_endpoint		= -1,
+	.glocont_endpoint	= 0x07,
+	.calculate_baud_rate	= keyspan_usa19w_calc_baud,
+	.baudclk		= KEYSPAN_USA19W_BAUDCLK,
+};
+
+static const struct keyspan_device_details usa49wg_device_details = {
+	.product_id		= keyspan_usa49wg_product_id,
+	.msg_format		= msg_usa49,
+	.num_ports		= 4,
+	.indat_endp_flip	= 0,
+	.outdat_endp_flip	= 0,
+	.indat_endpoints	= {-1, -1, -1, -1},	/* single 'global' data in EP */
+	.outdat_endpoints	= {0x01, 0x02, 0x04, 0x06},
+	.inack_endpoints	= {-1, -1, -1, -1},
+	.outcont_endpoints	= {-1, -1, -1, -1},
+	.instat_endpoint	= 0x81,
+	.indat_endpoint		= 0x88,
+	.glocont_endpoint	= 0x00,			/* uses control EP */
+	.calculate_baud_rate	= keyspan_usa19w_calc_baud,
+	.baudclk		= KEYSPAN_USA19W_BAUDCLK,
+};
+
+static const struct keyspan_device_details *keyspan_devices[] = {
+	&usa18x_device_details,
+	&usa19_device_details,
+	&usa19qi_device_details,
+	&mpr_device_details,
+	&usa19qw_device_details,
+	&usa19w_device_details,
+	&usa19hs_device_details,
+	&usa28_device_details,
+	&usa28x_device_details,
+	&usa28xa_device_details,
+	&usa28xg_device_details,
+	/* 28xb not required as it renumerates as a 28x */
+	&usa49w_device_details,
+	&usa49wlc_device_details,
+	&usa49wg_device_details,
+	NULL,
+};
+
+static const struct usb_device_id keyspan_ids_combined[] = {
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa18x_pre_product_id) },
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa19_pre_product_id) },
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa19w_pre_product_id) },
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa19qi_pre_product_id) },
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa19qw_pre_product_id) },
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_mpr_pre_product_id) },
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa28_pre_product_id) },
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa28x_pre_product_id) },
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa28xa_pre_product_id) },
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa28xb_pre_product_id) },
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa49w_pre_product_id) },
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa49wlc_pre_product_id) },
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa18x_product_id) },
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa19_product_id) },
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa19w_product_id) },
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa19qi_product_id) },
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa19qw_product_id) },
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa19hs_product_id) },
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_mpr_product_id) },
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa28_product_id) },
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa28x_product_id) },
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa28xa_product_id) },
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa28xg_product_id) },
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa49w_product_id)},
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa49wlc_product_id)},
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa49wg_product_id)},
+	{ } /* Terminating entry */
+};
+
+MODULE_DEVICE_TABLE(usb, keyspan_ids_combined);
+
+/* usb_device_id table for the pre-firmware download keyspan devices */
+static const struct usb_device_id keyspan_pre_ids[] = {
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa18x_pre_product_id) },
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa19_pre_product_id) },
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa19qi_pre_product_id) },
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa19qw_pre_product_id) },
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa19w_pre_product_id) },
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_mpr_pre_product_id) },
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa28_pre_product_id) },
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa28x_pre_product_id) },
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa28xa_pre_product_id) },
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa28xb_pre_product_id) },
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa49w_pre_product_id) },
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa49wlc_pre_product_id) },
+	{ } /* Terminating entry */
+};
+
+static const struct usb_device_id keyspan_1port_ids[] = {
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa18x_product_id) },
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa19_product_id) },
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa19qi_product_id) },
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa19qw_product_id) },
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa19w_product_id) },
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa19hs_product_id) },
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_mpr_product_id) },
+	{ } /* Terminating entry */
+};
+
+static const struct usb_device_id keyspan_2port_ids[] = {
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa28_product_id) },
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa28x_product_id) },
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa28xa_product_id) },
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa28xg_product_id) },
+	{ } /* Terminating entry */
+};
+
+static const struct usb_device_id keyspan_4port_ids[] = {
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa49w_product_id) },
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa49wlc_product_id)},
+	{ USB_DEVICE(KEYSPAN_VENDOR_ID, keyspan_usa49wg_product_id)},
+	{ } /* Terminating entry */
+};
+
+#define INSTAT_BUFLEN	32
+#define GLOCONT_BUFLEN	64
+#define INDAT49W_BUFLEN	512
+#define IN_BUFLEN	64
+#define OUT_BUFLEN	64
+#define INACK_BUFLEN	1
+#define OUTCONT_BUFLEN	64
+
+	/* Per device and per port private data */
+struct keyspan_serial_private {
+	const struct keyspan_device_details	*device_details;
+
+	struct urb	*instat_urb;
+	char		*instat_buf;
+
+	/* added to support 49wg, where data from all 4 ports comes in
+	   on 1 EP and high-speed supported */
+	struct urb	*indat_urb;
+	char		*indat_buf;
+
+	/* XXX this one probably will need a lock */
+	struct urb	*glocont_urb;
+	char		*glocont_buf;
+	char		*ctrl_buf;	/* for EP0 control message */
+};
+
+struct keyspan_port_private {
+	/* Keep track of which input & output endpoints to use */
+	int		in_flip;
+	int		out_flip;
+
+	/* Keep duplicate of device details in each port
+	   structure as well - simplifies some of the
+	   callback functions etc. */
+	const struct keyspan_device_details	*device_details;
+
+	/* Input endpoints and buffer for this port */
+	struct urb	*in_urbs[2];
+	char		*in_buffer[2];
+	/* Output endpoints and buffer for this port */
+	struct urb	*out_urbs[2];
+	char		*out_buffer[2];
+
+	/* Input ack endpoint */
+	struct urb	*inack_urb;
+	char		*inack_buffer;
+
+	/* Output control endpoint */
+	struct urb	*outcont_urb;
+	char		*outcont_buffer;
+
+	/* Settings for the port */
+	int		baud;
+	int		old_baud;
+	unsigned int	cflag;
+	unsigned int	old_cflag;
+	enum		{flow_none, flow_cts, flow_xon} flow_control;
+	int		rts_state;	/* Handshaking pins (outputs) */
+	int		dtr_state;
+	int		cts_state;	/* Handshaking pins (inputs) */
+	int		dsr_state;
+	int		dcd_state;
+	int		ri_state;
+	int		break_on;
+
+	unsigned long	tx_start_time[2];
+	int		resend_cont;	/* need to resend control packet */
+};
+
+/* Include Keyspan message headers.  All current Keyspan Adapters
+   make use of one of five message formats which are referred
+   to as USA-26, USA-28, USA-49, USA-90, USA-67 by Keyspan and
+   within this driver. */
+#include "keyspan_usa26msg.h"
+#include "keyspan_usa28msg.h"
+#include "keyspan_usa49msg.h"
+#include "keyspan_usa90msg.h"
+#include "keyspan_usa67msg.h"
+
+
+static void keyspan_break_ctl(struct tty_struct *tty, int break_state)
+{
+	struct usb_serial_port *port = tty->driver_data;
+	struct keyspan_port_private 	*p_priv;
+
+	p_priv = usb_get_serial_port_data(port);
+
+	if (break_state == -1)
+		p_priv->break_on = 1;
+	else
+		p_priv->break_on = 0;
+
+	keyspan_send_setup(port, 0);
+}
+
+
+static void keyspan_set_termios(struct tty_struct *tty,
+		struct usb_serial_port *port, struct ktermios *old_termios)
+{
+	int				baud_rate, device_port;
+	struct keyspan_port_private 	*p_priv;
+	const struct keyspan_device_details	*d_details;
+	unsigned int 			cflag;
+
+	p_priv = usb_get_serial_port_data(port);
+	d_details = p_priv->device_details;
+	cflag = tty->termios.c_cflag;
+	device_port = port->port_number;
+
+	/* Baud rate calculation takes baud rate as an integer
+	   so other rates can be generated if desired. */
+	baud_rate = tty_get_baud_rate(tty);
+	/* If no match or invalid, don't change */
+	if (d_details->calculate_baud_rate(port, baud_rate, d_details->baudclk,
+				NULL, NULL, NULL, device_port) == KEYSPAN_BAUD_RATE_OK) {
+		/* FIXME - more to do here to ensure rate changes cleanly */
+		/* FIXME - calculate exact rate from divisor ? */
+		p_priv->baud = baud_rate;
+	} else
+		baud_rate = tty_termios_baud_rate(old_termios);
+
+	tty_encode_baud_rate(tty, baud_rate, baud_rate);
+	/* set CTS/RTS handshake etc. */
+	p_priv->cflag = cflag;
+	p_priv->flow_control = (cflag & CRTSCTS) ? flow_cts : flow_none;
+
+	/* Mark/Space not supported */
+	tty->termios.c_cflag &= ~CMSPAR;
+
+	keyspan_send_setup(port, 0);
+}
+
+static int keyspan_tiocmget(struct tty_struct *tty)
+{
+	struct usb_serial_port *port = tty->driver_data;
+	struct keyspan_port_private *p_priv = usb_get_serial_port_data(port);
+	unsigned int			value;
+
+	value = ((p_priv->rts_state) ? TIOCM_RTS : 0) |
+		((p_priv->dtr_state) ? TIOCM_DTR : 0) |
+		((p_priv->cts_state) ? TIOCM_CTS : 0) |
+		((p_priv->dsr_state) ? TIOCM_DSR : 0) |
+		((p_priv->dcd_state) ? TIOCM_CAR : 0) |
+		((p_priv->ri_state) ? TIOCM_RNG : 0);
+
+	return value;
+}
+
+static int keyspan_tiocmset(struct tty_struct *tty,
+			    unsigned int set, unsigned int clear)
+{
+	struct usb_serial_port *port = tty->driver_data;
+	struct keyspan_port_private *p_priv = usb_get_serial_port_data(port);
+
+	if (set & TIOCM_RTS)
+		p_priv->rts_state = 1;
+	if (set & TIOCM_DTR)
+		p_priv->dtr_state = 1;
+	if (clear & TIOCM_RTS)
+		p_priv->rts_state = 0;
+	if (clear & TIOCM_DTR)
+		p_priv->dtr_state = 0;
+	keyspan_send_setup(port, 0);
+	return 0;
+}
+
+/* Write function is similar for the four protocols used
+   with only a minor change for usa90 (usa19hs) required */
+static int keyspan_write(struct tty_struct *tty,
+	struct usb_serial_port *port, const unsigned char *buf, int count)
+{
+	struct keyspan_port_private 	*p_priv;
+	const struct keyspan_device_details	*d_details;
+	int				flip;
+	int 				left, todo;
+	struct urb			*this_urb;
+	int 				err, maxDataLen, dataOffset;
+
+	p_priv = usb_get_serial_port_data(port);
+	d_details = p_priv->device_details;
+
+	if (d_details->msg_format == msg_usa90) {
+		maxDataLen = 64;
+		dataOffset = 0;
+	} else {
+		maxDataLen = 63;
+		dataOffset = 1;
+	}
+
+	dev_dbg(&port->dev, "%s - %d chars, flip=%d\n", __func__, count,
+		p_priv->out_flip);
+
+	for (left = count; left > 0; left -= todo) {
+		todo = left;
+		if (todo > maxDataLen)
+			todo = maxDataLen;
+
+		flip = p_priv->out_flip;
+
+		/* Check we have a valid urb/endpoint before we use it... */
+		this_urb = p_priv->out_urbs[flip];
+		if (this_urb == NULL) {
+			/* no bulk out, so return 0 bytes written */
+			dev_dbg(&port->dev, "%s - no output urb :(\n", __func__);
+			return count;
+		}
+
+		dev_dbg(&port->dev, "%s - endpoint %x flip %d\n",
+			__func__, usb_pipeendpoint(this_urb->pipe), flip);
+
+		if (this_urb->status == -EINPROGRESS) {
+			if (time_before(jiffies,
+					p_priv->tx_start_time[flip] + 10 * HZ))
+				break;
+			usb_unlink_urb(this_urb);
+			break;
+		}
+
+		/* First byte in buffer is "last flag" (except for usa19hx)
+		   - unused so for now so set to zero */
+		((char *)this_urb->transfer_buffer)[0] = 0;
+
+		memcpy(this_urb->transfer_buffer + dataOffset, buf, todo);
+		buf += todo;
+
+		/* send the data out the bulk port */
+		this_urb->transfer_buffer_length = todo + dataOffset;
+
+		err = usb_submit_urb(this_urb, GFP_ATOMIC);
+		if (err != 0)
+			dev_dbg(&port->dev, "usb_submit_urb(write bulk) failed (%d)\n", err);
+		p_priv->tx_start_time[flip] = jiffies;
+
+		/* Flip for next time if usa26 or usa28 interface
+		   (not used on usa49) */
+		p_priv->out_flip = (flip + 1) & d_details->outdat_endp_flip;
+	}
+
+	return count - left;
+}
+
+static void	usa26_indat_callback(struct urb *urb)
+{
+	int			i, err;
+	int			endpoint;
+	struct usb_serial_port	*port;
+	unsigned char 		*data = urb->transfer_buffer;
+	int status = urb->status;
+
+	endpoint = usb_pipeendpoint(urb->pipe);
+
+	if (status) {
+		dev_dbg(&urb->dev->dev, "%s - nonzero status %d on endpoint %x\n",
+			__func__, status, endpoint);
+		return;
+	}
+
+	port =  urb->context;
+	if (urb->actual_length) {
+		/* 0x80 bit is error flag */
+		if ((data[0] & 0x80) == 0) {
+			/* no errors on individual bytes, only
+			   possible overrun err */
+			if (data[0] & RXERROR_OVERRUN) {
+				tty_insert_flip_char(&port->port, 0,
+								TTY_OVERRUN);
+			}
+			for (i = 1; i < urb->actual_length ; ++i)
+				tty_insert_flip_char(&port->port, data[i],
+								TTY_NORMAL);
+		} else {
+			/* some bytes had errors, every byte has status */
+			dev_dbg(&port->dev, "%s - RX error!!!!\n", __func__);
+			for (i = 0; i + 1 < urb->actual_length; i += 2) {
+				int stat = data[i];
+				int flag = TTY_NORMAL;
+
+				if (stat & RXERROR_OVERRUN) {
+					tty_insert_flip_char(&port->port, 0,
+								TTY_OVERRUN);
+				}
+				/* XXX should handle break (0x10) */
+				if (stat & RXERROR_PARITY)
+					flag = TTY_PARITY;
+				else if (stat & RXERROR_FRAMING)
+					flag = TTY_FRAME;
+
+				tty_insert_flip_char(&port->port, data[i+1],
+						flag);
+			}
+		}
+		tty_flip_buffer_push(&port->port);
+	}
+
+	/* Resubmit urb so we continue receiving */
+	err = usb_submit_urb(urb, GFP_ATOMIC);
+	if (err != 0)
+		dev_dbg(&port->dev, "%s - resubmit read urb failed. (%d)\n", __func__, err);
+}
+
+/* Outdat handling is common for all devices */
+static void	usa2x_outdat_callback(struct urb *urb)
+{
+	struct usb_serial_port *port;
+	struct keyspan_port_private *p_priv;
+
+	port =  urb->context;
+	p_priv = usb_get_serial_port_data(port);
+	dev_dbg(&port->dev, "%s - urb %d\n", __func__, urb == p_priv->out_urbs[1]);
+
+	usb_serial_port_softint(port);
+}
+
+static void	usa26_inack_callback(struct urb *urb)
+{
+}
+
+static void	usa26_outcont_callback(struct urb *urb)
+{
+	struct usb_serial_port *port;
+	struct keyspan_port_private *p_priv;
+
+	port =  urb->context;
+	p_priv = usb_get_serial_port_data(port);
+
+	if (p_priv->resend_cont) {
+		dev_dbg(&port->dev, "%s - sending setup\n", __func__);
+		keyspan_usa26_send_setup(port->serial, port,
+						p_priv->resend_cont - 1);
+	}
+}
+
+static void	usa26_instat_callback(struct urb *urb)
+{
+	unsigned char 				*data = urb->transfer_buffer;
+	struct keyspan_usa26_portStatusMessage	*msg;
+	struct usb_serial			*serial;
+	struct usb_serial_port			*port;
+	struct keyspan_port_private	 	*p_priv;
+	int old_dcd_state, err;
+	int status = urb->status;
+
+	serial =  urb->context;
+
+	if (status) {
+		dev_dbg(&urb->dev->dev, "%s - nonzero status: %d\n",
+				__func__, status);
+		return;
+	}
+	if (urb->actual_length != 9) {
+		dev_dbg(&urb->dev->dev, "%s - %d byte report??\n", __func__, urb->actual_length);
+		goto exit;
+	}
+
+	msg = (struct keyspan_usa26_portStatusMessage *)data;
+
+	/* Check port number from message and retrieve private data */
+	if (msg->port >= serial->num_ports) {
+		dev_dbg(&urb->dev->dev, "%s - Unexpected port number %d\n", __func__, msg->port);
+		goto exit;
+	}
+	port = serial->port[msg->port];
+	p_priv = usb_get_serial_port_data(port);
+	if (!p_priv)
+		goto resubmit;
+
+	/* Update handshaking pin state information */
+	old_dcd_state = p_priv->dcd_state;
+	p_priv->cts_state = ((msg->hskia_cts) ? 1 : 0);
+	p_priv->dsr_state = ((msg->dsr) ? 1 : 0);
+	p_priv->dcd_state = ((msg->gpia_dcd) ? 1 : 0);
+	p_priv->ri_state = ((msg->ri) ? 1 : 0);
+
+	if (old_dcd_state != p_priv->dcd_state)
+		tty_port_tty_hangup(&port->port, true);
+resubmit:
+	/* Resubmit urb so we continue receiving */
+	err = usb_submit_urb(urb, GFP_ATOMIC);
+	if (err != 0)
+		dev_dbg(&port->dev, "%s - resubmit read urb failed. (%d)\n", __func__, err);
+exit: ;
+}
+
+static void	usa26_glocont_callback(struct urb *urb)
+{
+}
+
+
+static void usa28_indat_callback(struct urb *urb)
+{
+	int                     err;
+	struct usb_serial_port  *port;
+	unsigned char           *data;
+	struct keyspan_port_private             *p_priv;
+	int status = urb->status;
+
+	port =  urb->context;
+	p_priv = usb_get_serial_port_data(port);
+	data = urb->transfer_buffer;
+
+	if (urb != p_priv->in_urbs[p_priv->in_flip])
+		return;
+
+	do {
+		if (status) {
+			dev_dbg(&urb->dev->dev, "%s - nonzero status %d on endpoint %x\n",
+				__func__, status, usb_pipeendpoint(urb->pipe));
+			return;
+		}
+
+		port =  urb->context;
+		p_priv = usb_get_serial_port_data(port);
+		data = urb->transfer_buffer;
+
+		if (urb->actual_length) {
+			tty_insert_flip_string(&port->port, data,
+					urb->actual_length);
+			tty_flip_buffer_push(&port->port);
+		}
+
+		/* Resubmit urb so we continue receiving */
+		err = usb_submit_urb(urb, GFP_ATOMIC);
+		if (err != 0)
+			dev_dbg(&port->dev, "%s - resubmit read urb failed. (%d)\n",
+							__func__, err);
+		p_priv->in_flip ^= 1;
+
+		urb = p_priv->in_urbs[p_priv->in_flip];
+	} while (urb->status != -EINPROGRESS);
+}
+
+static void	usa28_inack_callback(struct urb *urb)
+{
+}
+
+static void	usa28_outcont_callback(struct urb *urb)
+{
+	struct usb_serial_port *port;
+	struct keyspan_port_private *p_priv;
+
+	port =  urb->context;
+	p_priv = usb_get_serial_port_data(port);
+
+	if (p_priv->resend_cont) {
+		dev_dbg(&port->dev, "%s - sending setup\n", __func__);
+		keyspan_usa28_send_setup(port->serial, port,
+						p_priv->resend_cont - 1);
+	}
+}
+
+static void	usa28_instat_callback(struct urb *urb)
+{
+	int					err;
+	unsigned char 				*data = urb->transfer_buffer;
+	struct keyspan_usa28_portStatusMessage	*msg;
+	struct usb_serial			*serial;
+	struct usb_serial_port			*port;
+	struct keyspan_port_private	 	*p_priv;
+	int old_dcd_state;
+	int status = urb->status;
+
+	serial =  urb->context;
+
+	if (status) {
+		dev_dbg(&urb->dev->dev, "%s - nonzero status: %d\n",
+				__func__, status);
+		return;
+	}
+
+	if (urb->actual_length != sizeof(struct keyspan_usa28_portStatusMessage)) {
+		dev_dbg(&urb->dev->dev, "%s - bad length %d\n", __func__, urb->actual_length);
+		goto exit;
+	}
+
+	msg = (struct keyspan_usa28_portStatusMessage *)data;
+
+	/* Check port number from message and retrieve private data */
+	if (msg->port >= serial->num_ports) {
+		dev_dbg(&urb->dev->dev, "%s - Unexpected port number %d\n", __func__, msg->port);
+		goto exit;
+	}
+	port = serial->port[msg->port];
+	p_priv = usb_get_serial_port_data(port);
+	if (!p_priv)
+		goto resubmit;
+
+	/* Update handshaking pin state information */
+	old_dcd_state = p_priv->dcd_state;
+	p_priv->cts_state = ((msg->cts) ? 1 : 0);
+	p_priv->dsr_state = ((msg->dsr) ? 1 : 0);
+	p_priv->dcd_state = ((msg->dcd) ? 1 : 0);
+	p_priv->ri_state = ((msg->ri) ? 1 : 0);
+
+	if (old_dcd_state != p_priv->dcd_state && old_dcd_state)
+		tty_port_tty_hangup(&port->port, true);
+resubmit:
+		/* Resubmit urb so we continue receiving */
+	err = usb_submit_urb(urb, GFP_ATOMIC);
+	if (err != 0)
+		dev_dbg(&port->dev, "%s - resubmit read urb failed. (%d)\n", __func__, err);
+exit: ;
+}
+
+static void	usa28_glocont_callback(struct urb *urb)
+{
+}
+
+
+static void	usa49_glocont_callback(struct urb *urb)
+{
+	struct usb_serial *serial;
+	struct usb_serial_port *port;
+	struct keyspan_port_private *p_priv;
+	int i;
+
+	serial =  urb->context;
+	for (i = 0; i < serial->num_ports; ++i) {
+		port = serial->port[i];
+		p_priv = usb_get_serial_port_data(port);
+		if (!p_priv)
+			continue;
+
+		if (p_priv->resend_cont) {
+			dev_dbg(&port->dev, "%s - sending setup\n", __func__);
+			keyspan_usa49_send_setup(serial, port,
+						p_priv->resend_cont - 1);
+			break;
+		}
+	}
+}
+
+	/* This is actually called glostat in the Keyspan
+	   doco */
+static void	usa49_instat_callback(struct urb *urb)
+{
+	int					err;
+	unsigned char 				*data = urb->transfer_buffer;
+	struct keyspan_usa49_portStatusMessage	*msg;
+	struct usb_serial			*serial;
+	struct usb_serial_port			*port;
+	struct keyspan_port_private	 	*p_priv;
+	int old_dcd_state;
+	int status = urb->status;
+
+	serial =  urb->context;
+
+	if (status) {
+		dev_dbg(&urb->dev->dev, "%s - nonzero status: %d\n",
+				__func__, status);
+		return;
+	}
+
+	if (urb->actual_length !=
+			sizeof(struct keyspan_usa49_portStatusMessage)) {
+		dev_dbg(&urb->dev->dev, "%s - bad length %d\n", __func__, urb->actual_length);
+		goto exit;
+	}
+
+	msg = (struct keyspan_usa49_portStatusMessage *)data;
+
+	/* Check port number from message and retrieve private data */
+	if (msg->portNumber >= serial->num_ports) {
+		dev_dbg(&urb->dev->dev, "%s - Unexpected port number %d\n",
+			__func__, msg->portNumber);
+		goto exit;
+	}
+	port = serial->port[msg->portNumber];
+	p_priv = usb_get_serial_port_data(port);
+	if (!p_priv)
+		goto resubmit;
+
+	/* Update handshaking pin state information */
+	old_dcd_state = p_priv->dcd_state;
+	p_priv->cts_state = ((msg->cts) ? 1 : 0);
+	p_priv->dsr_state = ((msg->dsr) ? 1 : 0);
+	p_priv->dcd_state = ((msg->dcd) ? 1 : 0);
+	p_priv->ri_state = ((msg->ri) ? 1 : 0);
+
+	if (old_dcd_state != p_priv->dcd_state && old_dcd_state)
+		tty_port_tty_hangup(&port->port, true);
+resubmit:
+	/* Resubmit urb so we continue receiving */
+	err = usb_submit_urb(urb, GFP_ATOMIC);
+	if (err != 0)
+		dev_dbg(&port->dev, "%s - resubmit read urb failed. (%d)\n", __func__, err);
+exit:	;
+}
+
+static void	usa49_inack_callback(struct urb *urb)
+{
+}
+
+static void	usa49_indat_callback(struct urb *urb)
+{
+	int			i, err;
+	int			endpoint;
+	struct usb_serial_port	*port;
+	unsigned char 		*data = urb->transfer_buffer;
+	int status = urb->status;
+
+	endpoint = usb_pipeendpoint(urb->pipe);
+
+	if (status) {
+		dev_dbg(&urb->dev->dev, "%s - nonzero status %d on endpoint %x\n",
+			__func__, status, endpoint);
+		return;
+	}
+
+	port =  urb->context;
+	if (urb->actual_length) {
+		/* 0x80 bit is error flag */
+		if ((data[0] & 0x80) == 0) {
+			/* no error on any byte */
+			tty_insert_flip_string(&port->port, data + 1,
+						urb->actual_length - 1);
+		} else {
+			/* some bytes had errors, every byte has status */
+			for (i = 0; i + 1 < urb->actual_length; i += 2) {
+				int stat = data[i];
+				int flag = TTY_NORMAL;
+
+				if (stat & RXERROR_OVERRUN) {
+					tty_insert_flip_char(&port->port, 0,
+								TTY_OVERRUN);
+				}
+				/* XXX should handle break (0x10) */
+				if (stat & RXERROR_PARITY)
+					flag = TTY_PARITY;
+				else if (stat & RXERROR_FRAMING)
+					flag = TTY_FRAME;
+
+				tty_insert_flip_char(&port->port, data[i+1],
+						flag);
+			}
+		}
+		tty_flip_buffer_push(&port->port);
+	}
+
+	/* Resubmit urb so we continue receiving */
+	err = usb_submit_urb(urb, GFP_ATOMIC);
+	if (err != 0)
+		dev_dbg(&port->dev, "%s - resubmit read urb failed. (%d)\n", __func__, err);
+}
+
+static void usa49wg_indat_callback(struct urb *urb)
+{
+	int			i, len, x, err;
+	struct usb_serial	*serial;
+	struct usb_serial_port	*port;
+	unsigned char 		*data = urb->transfer_buffer;
+	int status = urb->status;
+
+	serial = urb->context;
+
+	if (status) {
+		dev_dbg(&urb->dev->dev, "%s - nonzero status: %d\n",
+				__func__, status);
+		return;
+	}
+
+	/* inbound data is in the form P#, len, status, data */
+	i = 0;
+	len = 0;
+
+	while (i < urb->actual_length) {
+
+		/* Check port number from message */
+		if (data[i] >= serial->num_ports) {
+			dev_dbg(&urb->dev->dev, "%s - Unexpected port number %d\n",
+				__func__, data[i]);
+			return;
+		}
+		port = serial->port[data[i++]];
+		len = data[i++];
+
+		/* 0x80 bit is error flag */
+		if ((data[i] & 0x80) == 0) {
+			/* no error on any byte */
+			i++;
+			for (x = 1; x < len && i < urb->actual_length; ++x)
+				tty_insert_flip_char(&port->port,
+						data[i++], 0);
+		} else {
+			/*
+			 * some bytes had errors, every byte has status
+			 */
+			for (x = 0; x + 1 < len &&
+				    i + 1 < urb->actual_length; x += 2) {
+				int stat = data[i];
+				int flag = TTY_NORMAL;
+
+				if (stat & RXERROR_OVERRUN) {
+					tty_insert_flip_char(&port->port, 0,
+								TTY_OVERRUN);
+				}
+				/* XXX should handle break (0x10) */
+				if (stat & RXERROR_PARITY)
+					flag = TTY_PARITY;
+				else if (stat & RXERROR_FRAMING)
+					flag = TTY_FRAME;
+
+				tty_insert_flip_char(&port->port, data[i+1],
+						     flag);
+				i += 2;
+			}
+		}
+		tty_flip_buffer_push(&port->port);
+	}
+
+	/* Resubmit urb so we continue receiving */
+	err = usb_submit_urb(urb, GFP_ATOMIC);
+	if (err != 0)
+		dev_dbg(&urb->dev->dev, "%s - resubmit read urb failed. (%d)\n", __func__, err);
+}
+
+/* not used, usa-49 doesn't have per-port control endpoints */
+static void usa49_outcont_callback(struct urb *urb)
+{
+}
+
+static void usa90_indat_callback(struct urb *urb)
+{
+	int			i, err;
+	int			endpoint;
+	struct usb_serial_port	*port;
+	struct keyspan_port_private	 	*p_priv;
+	unsigned char 		*data = urb->transfer_buffer;
+	int status = urb->status;
+
+	endpoint = usb_pipeendpoint(urb->pipe);
+
+	if (status) {
+		dev_dbg(&urb->dev->dev, "%s - nonzero status %d on endpoint %x\n",
+			__func__, status, endpoint);
+		return;
+	}
+
+	port =  urb->context;
+	p_priv = usb_get_serial_port_data(port);
+
+	if (urb->actual_length) {
+		/* if current mode is DMA, looks like usa28 format
+		   otherwise looks like usa26 data format */
+
+		if (p_priv->baud > 57600)
+			tty_insert_flip_string(&port->port, data,
+					urb->actual_length);
+		else {
+			/* 0x80 bit is error flag */
+			if ((data[0] & 0x80) == 0) {
+				/* no errors on individual bytes, only
+				   possible overrun err*/
+				if (data[0] & RXERROR_OVERRUN) {
+					tty_insert_flip_char(&port->port, 0,
+								TTY_OVERRUN);
+				}
+				for (i = 1; i < urb->actual_length ; ++i)
+					tty_insert_flip_char(&port->port,
+							data[i], TTY_NORMAL);
+			}  else {
+			/* some bytes had errors, every byte has status */
+				dev_dbg(&port->dev, "%s - RX error!!!!\n", __func__);
+				for (i = 0; i + 1 < urb->actual_length; i += 2) {
+					int stat = data[i];
+					int flag = TTY_NORMAL;
+
+					if (stat & RXERROR_OVERRUN) {
+						tty_insert_flip_char(
+								&port->port, 0,
+								TTY_OVERRUN);
+					}
+					/* XXX should handle break (0x10) */
+					if (stat & RXERROR_PARITY)
+						flag = TTY_PARITY;
+					else if (stat & RXERROR_FRAMING)
+						flag = TTY_FRAME;
+
+					tty_insert_flip_char(&port->port,
+							data[i+1], flag);
+				}
+			}
+		}
+		tty_flip_buffer_push(&port->port);
+	}
+
+	/* Resubmit urb so we continue receiving */
+	err = usb_submit_urb(urb, GFP_ATOMIC);
+	if (err != 0)
+		dev_dbg(&port->dev, "%s - resubmit read urb failed. (%d)\n", __func__, err);
+}
+
+
+static void	usa90_instat_callback(struct urb *urb)
+{
+	unsigned char 				*data = urb->transfer_buffer;
+	struct keyspan_usa90_portStatusMessage	*msg;
+	struct usb_serial			*serial;
+	struct usb_serial_port			*port;
+	struct keyspan_port_private	 	*p_priv;
+	int old_dcd_state, err;
+	int status = urb->status;
+
+	serial =  urb->context;
+
+	if (status) {
+		dev_dbg(&urb->dev->dev, "%s - nonzero status: %d\n",
+				__func__, status);
+		return;
+	}
+	if (urb->actual_length < 14) {
+		dev_dbg(&urb->dev->dev, "%s - %d byte report??\n", __func__, urb->actual_length);
+		goto exit;
+	}
+
+	msg = (struct keyspan_usa90_portStatusMessage *)data;
+
+	/* Now do something useful with the data */
+
+	port = serial->port[0];
+	p_priv = usb_get_serial_port_data(port);
+	if (!p_priv)
+		goto resubmit;
+
+	/* Update handshaking pin state information */
+	old_dcd_state = p_priv->dcd_state;
+	p_priv->cts_state = ((msg->cts) ? 1 : 0);
+	p_priv->dsr_state = ((msg->dsr) ? 1 : 0);
+	p_priv->dcd_state = ((msg->dcd) ? 1 : 0);
+	p_priv->ri_state = ((msg->ri) ? 1 : 0);
+
+	if (old_dcd_state != p_priv->dcd_state && old_dcd_state)
+		tty_port_tty_hangup(&port->port, true);
+resubmit:
+	/* Resubmit urb so we continue receiving */
+	err = usb_submit_urb(urb, GFP_ATOMIC);
+	if (err != 0)
+		dev_dbg(&port->dev, "%s - resubmit read urb failed. (%d)\n", __func__, err);
+exit:
+	;
+}
+
+static void	usa90_outcont_callback(struct urb *urb)
+{
+	struct usb_serial_port *port;
+	struct keyspan_port_private *p_priv;
+
+	port =  urb->context;
+	p_priv = usb_get_serial_port_data(port);
+
+	if (p_priv->resend_cont) {
+		dev_dbg(&urb->dev->dev, "%s - sending setup\n", __func__);
+		keyspan_usa90_send_setup(port->serial, port,
+						p_priv->resend_cont - 1);
+	}
+}
+
+/* Status messages from the 28xg */
+static void	usa67_instat_callback(struct urb *urb)
+{
+	int					err;
+	unsigned char 				*data = urb->transfer_buffer;
+	struct keyspan_usa67_portStatusMessage	*msg;
+	struct usb_serial			*serial;
+	struct usb_serial_port			*port;
+	struct keyspan_port_private	 	*p_priv;
+	int old_dcd_state;
+	int status = urb->status;
+
+	serial = urb->context;
+
+	if (status) {
+		dev_dbg(&urb->dev->dev, "%s - nonzero status: %d\n",
+				__func__, status);
+		return;
+	}
+
+	if (urb->actual_length !=
+			sizeof(struct keyspan_usa67_portStatusMessage)) {
+		dev_dbg(&urb->dev->dev, "%s - bad length %d\n", __func__, urb->actual_length);
+		return;
+	}
+
+
+	/* Now do something useful with the data */
+	msg = (struct keyspan_usa67_portStatusMessage *)data;
+
+	/* Check port number from message and retrieve private data */
+	if (msg->port >= serial->num_ports) {
+		dev_dbg(&urb->dev->dev, "%s - Unexpected port number %d\n", __func__, msg->port);
+		return;
+	}
+
+	port = serial->port[msg->port];
+	p_priv = usb_get_serial_port_data(port);
+	if (!p_priv)
+		goto resubmit;
+
+	/* Update handshaking pin state information */
+	old_dcd_state = p_priv->dcd_state;
+	p_priv->cts_state = ((msg->hskia_cts) ? 1 : 0);
+	p_priv->dcd_state = ((msg->gpia_dcd) ? 1 : 0);
+
+	if (old_dcd_state != p_priv->dcd_state && old_dcd_state)
+		tty_port_tty_hangup(&port->port, true);
+resubmit:
+	/* Resubmit urb so we continue receiving */
+	err = usb_submit_urb(urb, GFP_ATOMIC);
+	if (err != 0)
+		dev_dbg(&port->dev, "%s - resubmit read urb failed. (%d)\n", __func__, err);
+}
+
+static void usa67_glocont_callback(struct urb *urb)
+{
+	struct usb_serial *serial;
+	struct usb_serial_port *port;
+	struct keyspan_port_private *p_priv;
+	int i;
+
+	serial = urb->context;
+	for (i = 0; i < serial->num_ports; ++i) {
+		port = serial->port[i];
+		p_priv = usb_get_serial_port_data(port);
+		if (!p_priv)
+			continue;
+
+		if (p_priv->resend_cont) {
+			dev_dbg(&port->dev, "%s - sending setup\n", __func__);
+			keyspan_usa67_send_setup(serial, port,
+						p_priv->resend_cont - 1);
+			break;
+		}
+	}
+}
+
+static int keyspan_write_room(struct tty_struct *tty)
+{
+	struct usb_serial_port *port = tty->driver_data;
+	struct keyspan_port_private	*p_priv;
+	const struct keyspan_device_details	*d_details;
+	int				flip;
+	int				data_len;
+	struct urb			*this_urb;
+
+	p_priv = usb_get_serial_port_data(port);
+	d_details = p_priv->device_details;
+
+	/* FIXME: locking */
+	if (d_details->msg_format == msg_usa90)
+		data_len = 64;
+	else
+		data_len = 63;
+
+	flip = p_priv->out_flip;
+
+	/* Check both endpoints to see if any are available. */
+	this_urb = p_priv->out_urbs[flip];
+	if (this_urb != NULL) {
+		if (this_urb->status != -EINPROGRESS)
+			return data_len;
+		flip = (flip + 1) & d_details->outdat_endp_flip;
+		this_urb = p_priv->out_urbs[flip];
+		if (this_urb != NULL) {
+			if (this_urb->status != -EINPROGRESS)
+				return data_len;
+		}
+	}
+	return 0;
+}
+
+
+static int keyspan_open(struct tty_struct *tty, struct usb_serial_port *port)
+{
+	struct keyspan_port_private 	*p_priv;
+	const struct keyspan_device_details	*d_details;
+	int				i, err;
+	int				baud_rate, device_port;
+	struct urb			*urb;
+	unsigned int			cflag = 0;
+
+	p_priv = usb_get_serial_port_data(port);
+	d_details = p_priv->device_details;
+
+	/* Set some sane defaults */
+	p_priv->rts_state = 1;
+	p_priv->dtr_state = 1;
+	p_priv->baud = 9600;
+
+	/* force baud and lcr to be set on open */
+	p_priv->old_baud = 0;
+	p_priv->old_cflag = 0;
+
+	p_priv->out_flip = 0;
+	p_priv->in_flip = 0;
+
+	/* Reset low level data toggle and start reading from endpoints */
+	for (i = 0; i < 2; i++) {
+		urb = p_priv->in_urbs[i];
+		if (urb == NULL)
+			continue;
+
+		/* make sure endpoint data toggle is synchronized
+		   with the device */
+		usb_clear_halt(urb->dev, urb->pipe);
+		err = usb_submit_urb(urb, GFP_KERNEL);
+		if (err != 0)
+			dev_dbg(&port->dev, "%s - submit urb %d failed (%d)\n", __func__, i, err);
+	}
+
+	/* Reset low level data toggle on out endpoints */
+	for (i = 0; i < 2; i++) {
+		urb = p_priv->out_urbs[i];
+		if (urb == NULL)
+			continue;
+		/* usb_settoggle(urb->dev, usb_pipeendpoint(urb->pipe),
+						usb_pipeout(urb->pipe), 0); */
+	}
+
+	/* get the terminal config for the setup message now so we don't
+	 * need to send 2 of them */
+
+	device_port = port->port_number;
+	if (tty) {
+		cflag = tty->termios.c_cflag;
+		/* Baud rate calculation takes baud rate as an integer
+		   so other rates can be generated if desired. */
+		baud_rate = tty_get_baud_rate(tty);
+		/* If no match or invalid, leave as default */
+		if (baud_rate >= 0
+		    && d_details->calculate_baud_rate(port, baud_rate, d_details->baudclk,
+					NULL, NULL, NULL, device_port) == KEYSPAN_BAUD_RATE_OK) {
+			p_priv->baud = baud_rate;
+		}
+	}
+	/* set CTS/RTS handshake etc. */
+	p_priv->cflag = cflag;
+	p_priv->flow_control = (cflag & CRTSCTS) ? flow_cts : flow_none;
+
+	keyspan_send_setup(port, 1);
+	/* mdelay(100); */
+	/* keyspan_set_termios(port, NULL); */
+
+	return 0;
+}
+
+static void keyspan_dtr_rts(struct usb_serial_port *port, int on)
+{
+	struct keyspan_port_private *p_priv = usb_get_serial_port_data(port);
+
+	p_priv->rts_state = on;
+	p_priv->dtr_state = on;
+	keyspan_send_setup(port, 0);
+}
+
+static void keyspan_close(struct usb_serial_port *port)
+{
+	int			i;
+	struct keyspan_port_private 	*p_priv;
+
+	p_priv = usb_get_serial_port_data(port);
+
+	p_priv->rts_state = 0;
+	p_priv->dtr_state = 0;
+
+	keyspan_send_setup(port, 2);
+	/* pilot-xfer seems to work best with this delay */
+	mdelay(100);
+
+	p_priv->out_flip = 0;
+	p_priv->in_flip = 0;
+
+	usb_kill_urb(p_priv->inack_urb);
+	for (i = 0; i < 2; i++) {
+		usb_kill_urb(p_priv->in_urbs[i]);
+		usb_kill_urb(p_priv->out_urbs[i]);
+	}
+}
+
+/* download the firmware to a pre-renumeration device */
+static int keyspan_fake_startup(struct usb_serial *serial)
+{
+	char	*fw_name;
+
+	dev_dbg(&serial->dev->dev, "Keyspan startup version %04x product %04x\n",
+		le16_to_cpu(serial->dev->descriptor.bcdDevice),
+		le16_to_cpu(serial->dev->descriptor.idProduct));
+
+	if ((le16_to_cpu(serial->dev->descriptor.bcdDevice) & 0x8000)
+								!= 0x8000) {
+		dev_dbg(&serial->dev->dev, "Firmware already loaded.  Quitting.\n");
+		return 1;
+	}
+
+		/* Select firmware image on the basis of idProduct */
+	switch (le16_to_cpu(serial->dev->descriptor.idProduct)) {
+	case keyspan_usa28_pre_product_id:
+		fw_name = "keyspan/usa28.fw";
+		break;
+
+	case keyspan_usa28x_pre_product_id:
+		fw_name = "keyspan/usa28x.fw";
+		break;
+
+	case keyspan_usa28xa_pre_product_id:
+		fw_name = "keyspan/usa28xa.fw";
+		break;
+
+	case keyspan_usa28xb_pre_product_id:
+		fw_name = "keyspan/usa28xb.fw";
+		break;
+
+	case keyspan_usa19_pre_product_id:
+		fw_name = "keyspan/usa19.fw";
+		break;
+
+	case keyspan_usa19qi_pre_product_id:
+		fw_name = "keyspan/usa19qi.fw";
+		break;
+
+	case keyspan_mpr_pre_product_id:
+		fw_name = "keyspan/mpr.fw";
+		break;
+
+	case keyspan_usa19qw_pre_product_id:
+		fw_name = "keyspan/usa19qw.fw";
+		break;
+
+	case keyspan_usa18x_pre_product_id:
+		fw_name = "keyspan/usa18x.fw";
+		break;
+
+	case keyspan_usa19w_pre_product_id:
+		fw_name = "keyspan/usa19w.fw";
+		break;
+
+	case keyspan_usa49w_pre_product_id:
+		fw_name = "keyspan/usa49w.fw";
+		break;
+
+	case keyspan_usa49wlc_pre_product_id:
+		fw_name = "keyspan/usa49wlc.fw";
+		break;
+
+	default:
+		dev_err(&serial->dev->dev, "Unknown product ID (%04x)\n",
+			le16_to_cpu(serial->dev->descriptor.idProduct));
+		return 1;
+	}
+
+	dev_dbg(&serial->dev->dev, "Uploading Keyspan %s firmware.\n", fw_name);
+
+	if (ezusb_fx1_ihex_firmware_download(serial->dev, fw_name) < 0) {
+		dev_err(&serial->dev->dev, "failed to load firmware \"%s\"\n",
+			fw_name);
+		return -ENOENT;
+	}
+
+	/* after downloading firmware Renumeration will occur in a
+	  moment and the new device will bind to the real driver */
+
+	/* we don't want this device to have a driver assigned to it. */
+	return 1;
+}
+
+/* Helper functions used by keyspan_setup_urbs */
+static struct usb_endpoint_descriptor const *find_ep(struct usb_serial const *serial,
+						     int endpoint)
+{
+	struct usb_host_interface *iface_desc;
+	struct usb_endpoint_descriptor *ep;
+	int i;
+
+	iface_desc = serial->interface->cur_altsetting;
+	for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
+		ep = &iface_desc->endpoint[i].desc;
+		if (ep->bEndpointAddress == endpoint)
+			return ep;
+	}
+	dev_warn(&serial->interface->dev, "found no endpoint descriptor for endpoint %x\n",
+			endpoint);
+	return NULL;
+}
+
+static struct urb *keyspan_setup_urb(struct usb_serial *serial, int endpoint,
+				      int dir, void *ctx, char *buf, int len,
+				      void (*callback)(struct urb *))
+{
+	struct urb *urb;
+	struct usb_endpoint_descriptor const *ep_desc;
+	char const *ep_type_name;
+
+	if (endpoint == -1)
+		return NULL;		/* endpoint not needed */
+
+	dev_dbg(&serial->interface->dev, "%s - alloc for endpoint %x\n",
+			__func__, endpoint);
+	urb = usb_alloc_urb(0, GFP_KERNEL);		/* No ISO */
+	if (!urb)
+		return NULL;
+
+	if (endpoint == 0) {
+		/* control EP filled in when used */
+		return urb;
+	}
+
+	ep_desc = find_ep(serial, endpoint);
+	if (!ep_desc) {
+		usb_free_urb(urb);
+		return NULL;
+	}
+	if (usb_endpoint_xfer_int(ep_desc)) {
+		ep_type_name = "INT";
+		usb_fill_int_urb(urb, serial->dev,
+				 usb_sndintpipe(serial->dev, endpoint) | dir,
+				 buf, len, callback, ctx,
+				 ep_desc->bInterval);
+	} else if (usb_endpoint_xfer_bulk(ep_desc)) {
+		ep_type_name = "BULK";
+		usb_fill_bulk_urb(urb, serial->dev,
+				  usb_sndbulkpipe(serial->dev, endpoint) | dir,
+				  buf, len, callback, ctx);
+	} else {
+		dev_warn(&serial->interface->dev,
+			 "unsupported endpoint type %x\n",
+			 usb_endpoint_type(ep_desc));
+		usb_free_urb(urb);
+		return NULL;
+	}
+
+	dev_dbg(&serial->interface->dev, "%s - using urb %p for %s endpoint %x\n",
+	    __func__, urb, ep_type_name, endpoint);
+	return urb;
+}
+
+static struct callbacks {
+	void	(*instat_callback)(struct urb *);
+	void	(*glocont_callback)(struct urb *);
+	void	(*indat_callback)(struct urb *);
+	void	(*outdat_callback)(struct urb *);
+	void	(*inack_callback)(struct urb *);
+	void	(*outcont_callback)(struct urb *);
+} keyspan_callbacks[] = {
+	{
+		/* msg_usa26 callbacks */
+		.instat_callback =	usa26_instat_callback,
+		.glocont_callback =	usa26_glocont_callback,
+		.indat_callback =	usa26_indat_callback,
+		.outdat_callback =	usa2x_outdat_callback,
+		.inack_callback =	usa26_inack_callback,
+		.outcont_callback =	usa26_outcont_callback,
+	}, {
+		/* msg_usa28 callbacks */
+		.instat_callback =	usa28_instat_callback,
+		.glocont_callback =	usa28_glocont_callback,
+		.indat_callback =	usa28_indat_callback,
+		.outdat_callback =	usa2x_outdat_callback,
+		.inack_callback =	usa28_inack_callback,
+		.outcont_callback =	usa28_outcont_callback,
+	}, {
+		/* msg_usa49 callbacks */
+		.instat_callback =	usa49_instat_callback,
+		.glocont_callback =	usa49_glocont_callback,
+		.indat_callback =	usa49_indat_callback,
+		.outdat_callback =	usa2x_outdat_callback,
+		.inack_callback =	usa49_inack_callback,
+		.outcont_callback =	usa49_outcont_callback,
+	}, {
+		/* msg_usa90 callbacks */
+		.instat_callback =	usa90_instat_callback,
+		.glocont_callback =	usa28_glocont_callback,
+		.indat_callback =	usa90_indat_callback,
+		.outdat_callback =	usa2x_outdat_callback,
+		.inack_callback =	usa28_inack_callback,
+		.outcont_callback =	usa90_outcont_callback,
+	}, {
+		/* msg_usa67 callbacks */
+		.instat_callback =	usa67_instat_callback,
+		.glocont_callback =	usa67_glocont_callback,
+		.indat_callback =	usa26_indat_callback,
+		.outdat_callback =	usa2x_outdat_callback,
+		.inack_callback =	usa26_inack_callback,
+		.outcont_callback =	usa26_outcont_callback,
+	}
+};
+
+	/* Generic setup urbs function that uses
+	   data in device_details */
+static void keyspan_setup_urbs(struct usb_serial *serial)
+{
+	struct keyspan_serial_private 	*s_priv;
+	const struct keyspan_device_details	*d_details;
+	struct callbacks		*cback;
+
+	s_priv = usb_get_serial_data(serial);
+	d_details = s_priv->device_details;
+
+	/* Setup values for the various callback routines */
+	cback = &keyspan_callbacks[d_details->msg_format];
+
+	/* Allocate and set up urbs for each one that is in use,
+	   starting with instat endpoints */
+	s_priv->instat_urb = keyspan_setup_urb
+		(serial, d_details->instat_endpoint, USB_DIR_IN,
+		 serial, s_priv->instat_buf, INSTAT_BUFLEN,
+		 cback->instat_callback);
+
+	s_priv->indat_urb = keyspan_setup_urb
+		(serial, d_details->indat_endpoint, USB_DIR_IN,
+		 serial, s_priv->indat_buf, INDAT49W_BUFLEN,
+		 usa49wg_indat_callback);
+
+	s_priv->glocont_urb = keyspan_setup_urb
+		(serial, d_details->glocont_endpoint, USB_DIR_OUT,
+		 serial, s_priv->glocont_buf, GLOCONT_BUFLEN,
+		 cback->glocont_callback);
+}
+
+/* usa19 function doesn't require prescaler */
+static int keyspan_usa19_calc_baud(struct usb_serial_port *port,
+				   u32 baud_rate, u32 baudclk, u8 *rate_hi,
+				   u8 *rate_low, u8 *prescaler, int portnum)
+{
+	u32 	b16,	/* baud rate times 16 (actual rate used internally) */
+		div,	/* divisor */
+		cnt;	/* inverse of divisor (programmed into 8051) */
+
+	dev_dbg(&port->dev, "%s - %d.\n", __func__, baud_rate);
+
+	/* prevent divide by zero...  */
+	b16 = baud_rate * 16L;
+	if (b16 == 0)
+		return KEYSPAN_INVALID_BAUD_RATE;
+	/* Any "standard" rate over 57k6 is marginal on the USA-19
+	   as we run out of divisor resolution. */
+	if (baud_rate > 57600)
+		return KEYSPAN_INVALID_BAUD_RATE;
+
+	/* calculate the divisor and the counter (its inverse) */
+	div = baudclk / b16;
+	if (div == 0)
+		return KEYSPAN_INVALID_BAUD_RATE;
+	else
+		cnt = 0 - div;
+
+	if (div > 0xffff)
+		return KEYSPAN_INVALID_BAUD_RATE;
+
+	/* return the counter values if non-null */
+	if (rate_low)
+		*rate_low = (u8) (cnt & 0xff);
+	if (rate_hi)
+		*rate_hi = (u8) ((cnt >> 8) & 0xff);
+	if (rate_low && rate_hi)
+		dev_dbg(&port->dev, "%s - %d %02x %02x.\n",
+				__func__, baud_rate, *rate_hi, *rate_low);
+	return KEYSPAN_BAUD_RATE_OK;
+}
+
+/* usa19hs function doesn't require prescaler */
+static int keyspan_usa19hs_calc_baud(struct usb_serial_port *port,
+				     u32 baud_rate, u32 baudclk, u8 *rate_hi,
+				     u8 *rate_low, u8 *prescaler, int portnum)
+{
+	u32 	b16,	/* baud rate times 16 (actual rate used internally) */
+			div;	/* divisor */
+
+	dev_dbg(&port->dev, "%s - %d.\n", __func__, baud_rate);
+
+	/* prevent divide by zero...  */
+	b16 = baud_rate * 16L;
+	if (b16 == 0)
+		return KEYSPAN_INVALID_BAUD_RATE;
+
+	/* calculate the divisor */
+	div = baudclk / b16;
+	if (div == 0)
+		return KEYSPAN_INVALID_BAUD_RATE;
+
+	if (div > 0xffff)
+		return KEYSPAN_INVALID_BAUD_RATE;
+
+	/* return the counter values if non-null */
+	if (rate_low)
+		*rate_low = (u8) (div & 0xff);
+
+	if (rate_hi)
+		*rate_hi = (u8) ((div >> 8) & 0xff);
+
+	if (rate_low && rate_hi)
+		dev_dbg(&port->dev, "%s - %d %02x %02x.\n",
+			__func__, baud_rate, *rate_hi, *rate_low);
+
+	return KEYSPAN_BAUD_RATE_OK;
+}
+
+static int keyspan_usa19w_calc_baud(struct usb_serial_port *port,
+				    u32 baud_rate, u32 baudclk, u8 *rate_hi,
+				    u8 *rate_low, u8 *prescaler, int portnum)
+{
+	u32 	b16,	/* baud rate times 16 (actual rate used internally) */
+		clk,	/* clock with 13/8 prescaler */
+		div,	/* divisor using 13/8 prescaler */
+		res,	/* resulting baud rate using 13/8 prescaler */
+		diff,	/* error using 13/8 prescaler */
+		smallest_diff;
+	u8	best_prescaler;
+	int	i;
+
+	dev_dbg(&port->dev, "%s - %d.\n", __func__, baud_rate);
+
+	/* prevent divide by zero */
+	b16 = baud_rate * 16L;
+	if (b16 == 0)
+		return KEYSPAN_INVALID_BAUD_RATE;
+
+	/* Calculate prescaler by trying them all and looking
+	   for best fit */
+
+	/* start with largest possible difference */
+	smallest_diff = 0xffffffff;
+
+		/* 0 is an invalid prescaler, used as a flag */
+	best_prescaler = 0;
+
+	for (i = 8; i <= 0xff; ++i) {
+		clk = (baudclk * 8) / (u32) i;
+
+		div = clk / b16;
+		if (div == 0)
+			continue;
+
+		res = clk / div;
+		diff = (res > b16) ? (res-b16) : (b16-res);
+
+		if (diff < smallest_diff) {
+			best_prescaler = i;
+			smallest_diff = diff;
+		}
+	}
+
+	if (best_prescaler == 0)
+		return KEYSPAN_INVALID_BAUD_RATE;
+
+	clk = (baudclk * 8) / (u32) best_prescaler;
+	div = clk / b16;
+
+	/* return the divisor and prescaler if non-null */
+	if (rate_low)
+		*rate_low = (u8) (div & 0xff);
+	if (rate_hi)
+		*rate_hi = (u8) ((div >> 8) & 0xff);
+	if (prescaler) {
+		*prescaler = best_prescaler;
+		/*  dev_dbg(&port->dev, "%s - %d %d\n", __func__, *prescaler, div); */
+	}
+	return KEYSPAN_BAUD_RATE_OK;
+}
+
+	/* USA-28 supports different maximum baud rates on each port */
+static int keyspan_usa28_calc_baud(struct usb_serial_port *port,
+				   u32 baud_rate, u32 baudclk, u8 *rate_hi,
+				   u8 *rate_low, u8 *prescaler, int portnum)
+{
+	u32 	b16,	/* baud rate times 16 (actual rate used internally) */
+		div,	/* divisor */
+		cnt;	/* inverse of divisor (programmed into 8051) */
+
+	dev_dbg(&port->dev, "%s - %d.\n", __func__, baud_rate);
+
+		/* prevent divide by zero */
+	b16 = baud_rate * 16L;
+	if (b16 == 0)
+		return KEYSPAN_INVALID_BAUD_RATE;
+
+	/* calculate the divisor and the counter (its inverse) */
+	div = KEYSPAN_USA28_BAUDCLK / b16;
+	if (div == 0)
+		return KEYSPAN_INVALID_BAUD_RATE;
+	else
+		cnt = 0 - div;
+
+	/* check for out of range, based on portnum,
+	   and return result */
+	if (portnum == 0) {
+		if (div > 0xffff)
+			return KEYSPAN_INVALID_BAUD_RATE;
+	} else {
+		if (portnum == 1) {
+			if (div > 0xff)
+				return KEYSPAN_INVALID_BAUD_RATE;
+		} else
+			return KEYSPAN_INVALID_BAUD_RATE;
+	}
+
+		/* return the counter values if not NULL
+		   (port 1 will ignore retHi) */
+	if (rate_low)
+		*rate_low = (u8) (cnt & 0xff);
+	if (rate_hi)
+		*rate_hi = (u8) ((cnt >> 8) & 0xff);
+	dev_dbg(&port->dev, "%s - %d OK.\n", __func__, baud_rate);
+	return KEYSPAN_BAUD_RATE_OK;
+}
+
+static int keyspan_usa26_send_setup(struct usb_serial *serial,
+				    struct usb_serial_port *port,
+				    int reset_port)
+{
+	struct keyspan_usa26_portControlMessage	msg;
+	struct keyspan_serial_private 		*s_priv;
+	struct keyspan_port_private 		*p_priv;
+	const struct keyspan_device_details	*d_details;
+	struct urb				*this_urb;
+	int 					device_port, err;
+
+	dev_dbg(&port->dev, "%s reset=%d\n", __func__, reset_port);
+
+	s_priv = usb_get_serial_data(serial);
+	p_priv = usb_get_serial_port_data(port);
+	d_details = s_priv->device_details;
+	device_port = port->port_number;
+
+	this_urb = p_priv->outcont_urb;
+
+		/* Make sure we have an urb then send the message */
+	if (this_urb == NULL) {
+		dev_dbg(&port->dev, "%s - oops no urb.\n", __func__);
+		return -1;
+	}
+
+	dev_dbg(&port->dev, "%s - endpoint %x\n",
+			__func__, usb_pipeendpoint(this_urb->pipe));
+
+	/* Save reset port val for resend.
+	   Don't overwrite resend for open/close condition. */
+	if ((reset_port + 1) > p_priv->resend_cont)
+		p_priv->resend_cont = reset_port + 1;
+	if (this_urb->status == -EINPROGRESS) {
+		/*  dev_dbg(&port->dev, "%s - already writing\n", __func__); */
+		mdelay(5);
+		return -1;
+	}
+
+	memset(&msg, 0, sizeof(struct keyspan_usa26_portControlMessage));
+
+	/* Only set baud rate if it's changed */
+	if (p_priv->old_baud != p_priv->baud) {
+		p_priv->old_baud = p_priv->baud;
+		msg.setClocking = 0xff;
+		if (d_details->calculate_baud_rate(port, p_priv->baud, d_details->baudclk,
+						   &msg.baudHi, &msg.baudLo, &msg.prescaler,
+						   device_port) == KEYSPAN_INVALID_BAUD_RATE) {
+			dev_dbg(&port->dev, "%s - Invalid baud rate %d requested, using 9600.\n",
+				__func__, p_priv->baud);
+			msg.baudLo = 0;
+			msg.baudHi = 125;	/* Values for 9600 baud */
+			msg.prescaler = 10;
+		}
+		msg.setPrescaler = 0xff;
+	}
+
+	msg.lcr = (p_priv->cflag & CSTOPB) ? STOPBITS_678_2 : STOPBITS_5678_1;
+	switch (p_priv->cflag & CSIZE) {
+	case CS5:
+		msg.lcr |= USA_DATABITS_5;
+		break;
+	case CS6:
+		msg.lcr |= USA_DATABITS_6;
+		break;
+	case CS7:
+		msg.lcr |= USA_DATABITS_7;
+		break;
+	case CS8:
+		msg.lcr |= USA_DATABITS_8;
+		break;
+	}
+	if (p_priv->cflag & PARENB) {
+		/* note USA_PARITY_NONE == 0 */
+		msg.lcr |= (p_priv->cflag & PARODD) ?
+			USA_PARITY_ODD : USA_PARITY_EVEN;
+	}
+	msg.setLcr = 0xff;
+
+	msg.ctsFlowControl = (p_priv->flow_control == flow_cts);
+	msg.xonFlowControl = 0;
+	msg.setFlowControl = 0xff;
+	msg.forwardingLength = 16;
+	msg.xonChar = 17;
+	msg.xoffChar = 19;
+
+	/* Opening port */
+	if (reset_port == 1) {
+		msg._txOn = 1;
+		msg._txOff = 0;
+		msg.txFlush = 0;
+		msg.txBreak = 0;
+		msg.rxOn = 1;
+		msg.rxOff = 0;
+		msg.rxFlush = 1;
+		msg.rxForward = 0;
+		msg.returnStatus = 0;
+		msg.resetDataToggle = 0xff;
+	}
+
+	/* Closing port */
+	else if (reset_port == 2) {
+		msg._txOn = 0;
+		msg._txOff = 1;
+		msg.txFlush = 0;
+		msg.txBreak = 0;
+		msg.rxOn = 0;
+		msg.rxOff = 1;
+		msg.rxFlush = 1;
+		msg.rxForward = 0;
+		msg.returnStatus = 0;
+		msg.resetDataToggle = 0;
+	}
+
+	/* Sending intermediate configs */
+	else {
+		msg._txOn = (!p_priv->break_on);
+		msg._txOff = 0;
+		msg.txFlush = 0;
+		msg.txBreak = (p_priv->break_on);
+		msg.rxOn = 0;
+		msg.rxOff = 0;
+		msg.rxFlush = 0;
+		msg.rxForward = 0;
+		msg.returnStatus = 0;
+		msg.resetDataToggle = 0x0;
+	}
+
+	/* Do handshaking outputs */
+	msg.setTxTriState_setRts = 0xff;
+	msg.txTriState_rts = p_priv->rts_state;
+
+	msg.setHskoa_setDtr = 0xff;
+	msg.hskoa_dtr = p_priv->dtr_state;
+
+	p_priv->resend_cont = 0;
+	memcpy(this_urb->transfer_buffer, &msg, sizeof(msg));
+
+	/* send the data out the device on control endpoint */
+	this_urb->transfer_buffer_length = sizeof(msg);
+
+	err = usb_submit_urb(this_urb, GFP_ATOMIC);
+	if (err != 0)
+		dev_dbg(&port->dev, "%s - usb_submit_urb(setup) failed (%d)\n", __func__, err);
+	return 0;
+}
+
+static int keyspan_usa28_send_setup(struct usb_serial *serial,
+				    struct usb_serial_port *port,
+				    int reset_port)
+{
+	struct keyspan_usa28_portControlMessage	msg;
+	struct keyspan_serial_private	 	*s_priv;
+	struct keyspan_port_private 		*p_priv;
+	const struct keyspan_device_details	*d_details;
+	struct urb				*this_urb;
+	int 					device_port, err;
+
+	s_priv = usb_get_serial_data(serial);
+	p_priv = usb_get_serial_port_data(port);
+	d_details = s_priv->device_details;
+	device_port = port->port_number;
+
+	/* only do something if we have a bulk out endpoint */
+	this_urb = p_priv->outcont_urb;
+	if (this_urb == NULL) {
+		dev_dbg(&port->dev, "%s - oops no urb.\n", __func__);
+		return -1;
+	}
+
+	/* Save reset port val for resend.
+	   Don't overwrite resend for open/close condition. */
+	if ((reset_port + 1) > p_priv->resend_cont)
+		p_priv->resend_cont = reset_port + 1;
+	if (this_urb->status == -EINPROGRESS) {
+		dev_dbg(&port->dev, "%s already writing\n", __func__);
+		mdelay(5);
+		return -1;
+	}
+
+	memset(&msg, 0, sizeof(struct keyspan_usa28_portControlMessage));
+
+	msg.setBaudRate = 1;
+	if (d_details->calculate_baud_rate(port, p_priv->baud, d_details->baudclk,
+					   &msg.baudHi, &msg.baudLo, NULL,
+					   device_port) == KEYSPAN_INVALID_BAUD_RATE) {
+		dev_dbg(&port->dev, "%s - Invalid baud rate requested %d.\n",
+						__func__, p_priv->baud);
+		msg.baudLo = 0xff;
+		msg.baudHi = 0xb2;	/* Values for 9600 baud */
+	}
+
+	/* If parity is enabled, we must calculate it ourselves. */
+	msg.parity = 0;		/* XXX for now */
+
+	msg.ctsFlowControl = (p_priv->flow_control == flow_cts);
+	msg.xonFlowControl = 0;
+
+	/* Do handshaking outputs, DTR is inverted relative to RTS */
+	msg.rts = p_priv->rts_state;
+	msg.dtr = p_priv->dtr_state;
+
+	msg.forwardingLength = 16;
+	msg.forwardMs = 10;
+	msg.breakThreshold = 45;
+	msg.xonChar = 17;
+	msg.xoffChar = 19;
+
+	/*msg.returnStatus = 1;
+	msg.resetDataToggle = 0xff;*/
+	/* Opening port */
+	if (reset_port == 1) {
+		msg._txOn = 1;
+		msg._txOff = 0;
+		msg.txFlush = 0;
+		msg.txForceXoff = 0;
+		msg.txBreak = 0;
+		msg.rxOn = 1;
+		msg.rxOff = 0;
+		msg.rxFlush = 1;
+		msg.rxForward = 0;
+		msg.returnStatus = 0;
+		msg.resetDataToggle = 0xff;
+	}
+	/* Closing port */
+	else if (reset_port == 2) {
+		msg._txOn = 0;
+		msg._txOff = 1;
+		msg.txFlush = 0;
+		msg.txForceXoff = 0;
+		msg.txBreak = 0;
+		msg.rxOn = 0;
+		msg.rxOff = 1;
+		msg.rxFlush = 1;
+		msg.rxForward = 0;
+		msg.returnStatus = 0;
+		msg.resetDataToggle = 0;
+	}
+	/* Sending intermediate configs */
+	else {
+		msg._txOn = (!p_priv->break_on);
+		msg._txOff = 0;
+		msg.txFlush = 0;
+		msg.txForceXoff = 0;
+		msg.txBreak = (p_priv->break_on);
+		msg.rxOn = 0;
+		msg.rxOff = 0;
+		msg.rxFlush = 0;
+		msg.rxForward = 0;
+		msg.returnStatus = 0;
+		msg.resetDataToggle = 0x0;
+	}
+
+	p_priv->resend_cont = 0;
+	memcpy(this_urb->transfer_buffer, &msg, sizeof(msg));
+
+	/* send the data out the device on control endpoint */
+	this_urb->transfer_buffer_length = sizeof(msg);
+
+	err = usb_submit_urb(this_urb, GFP_ATOMIC);
+	if (err != 0)
+		dev_dbg(&port->dev, "%s - usb_submit_urb(setup) failed\n", __func__);
+
+	return 0;
+}
+
+static int keyspan_usa49_send_setup(struct usb_serial *serial,
+				    struct usb_serial_port *port,
+				    int reset_port)
+{
+	struct keyspan_usa49_portControlMessage	msg;
+	struct usb_ctrlrequest 			*dr = NULL;
+	struct keyspan_serial_private 		*s_priv;
+	struct keyspan_port_private 		*p_priv;
+	const struct keyspan_device_details	*d_details;
+	struct urb				*this_urb;
+	int 					err, device_port;
+
+	s_priv = usb_get_serial_data(serial);
+	p_priv = usb_get_serial_port_data(port);
+	d_details = s_priv->device_details;
+
+	this_urb = s_priv->glocont_urb;
+
+	/* Work out which port within the device is being setup */
+	device_port = port->port_number;
+
+	/* Make sure we have an urb then send the message */
+	if (this_urb == NULL) {
+		dev_dbg(&port->dev, "%s - oops no urb for port.\n", __func__);
+		return -1;
+	}
+
+	dev_dbg(&port->dev, "%s - endpoint %x (%d)\n",
+		__func__, usb_pipeendpoint(this_urb->pipe), device_port);
+
+	/* Save reset port val for resend.
+	   Don't overwrite resend for open/close condition. */
+	if ((reset_port + 1) > p_priv->resend_cont)
+		p_priv->resend_cont = reset_port + 1;
+
+	if (this_urb->status == -EINPROGRESS) {
+		/*  dev_dbg(&port->dev, "%s - already writing\n", __func__); */
+		mdelay(5);
+		return -1;
+	}
+
+	memset(&msg, 0, sizeof(struct keyspan_usa49_portControlMessage));
+
+	msg.portNumber = device_port;
+
+	/* Only set baud rate if it's changed */
+	if (p_priv->old_baud != p_priv->baud) {
+		p_priv->old_baud = p_priv->baud;
+		msg.setClocking = 0xff;
+		if (d_details->calculate_baud_rate(port, p_priv->baud, d_details->baudclk,
+						   &msg.baudHi, &msg.baudLo, &msg.prescaler,
+						   device_port) == KEYSPAN_INVALID_BAUD_RATE) {
+			dev_dbg(&port->dev, "%s - Invalid baud rate %d requested, using 9600.\n",
+				__func__, p_priv->baud);
+			msg.baudLo = 0;
+			msg.baudHi = 125;	/* Values for 9600 baud */
+			msg.prescaler = 10;
+		}
+		/* msg.setPrescaler = 0xff; */
+	}
+
+	msg.lcr = (p_priv->cflag & CSTOPB) ? STOPBITS_678_2 : STOPBITS_5678_1;
+	switch (p_priv->cflag & CSIZE) {
+	case CS5:
+		msg.lcr |= USA_DATABITS_5;
+		break;
+	case CS6:
+		msg.lcr |= USA_DATABITS_6;
+		break;
+	case CS7:
+		msg.lcr |= USA_DATABITS_7;
+		break;
+	case CS8:
+		msg.lcr |= USA_DATABITS_8;
+		break;
+	}
+	if (p_priv->cflag & PARENB) {
+		/* note USA_PARITY_NONE == 0 */
+		msg.lcr |= (p_priv->cflag & PARODD) ?
+			USA_PARITY_ODD : USA_PARITY_EVEN;
+	}
+	msg.setLcr = 0xff;
+
+	msg.ctsFlowControl = (p_priv->flow_control == flow_cts);
+	msg.xonFlowControl = 0;
+	msg.setFlowControl = 0xff;
+
+	msg.forwardingLength = 16;
+	msg.xonChar = 17;
+	msg.xoffChar = 19;
+
+	/* Opening port */
+	if (reset_port == 1) {
+		msg._txOn = 1;
+		msg._txOff = 0;
+		msg.txFlush = 0;
+		msg.txBreak = 0;
+		msg.rxOn = 1;
+		msg.rxOff = 0;
+		msg.rxFlush = 1;
+		msg.rxForward = 0;
+		msg.returnStatus = 0;
+		msg.resetDataToggle = 0xff;
+		msg.enablePort = 1;
+		msg.disablePort = 0;
+	}
+	/* Closing port */
+	else if (reset_port == 2) {
+		msg._txOn = 0;
+		msg._txOff = 1;
+		msg.txFlush = 0;
+		msg.txBreak = 0;
+		msg.rxOn = 0;
+		msg.rxOff = 1;
+		msg.rxFlush = 1;
+		msg.rxForward = 0;
+		msg.returnStatus = 0;
+		msg.resetDataToggle = 0;
+		msg.enablePort = 0;
+		msg.disablePort = 1;
+	}
+	/* Sending intermediate configs */
+	else {
+		msg._txOn = (!p_priv->break_on);
+		msg._txOff = 0;
+		msg.txFlush = 0;
+		msg.txBreak = (p_priv->break_on);
+		msg.rxOn = 0;
+		msg.rxOff = 0;
+		msg.rxFlush = 0;
+		msg.rxForward = 0;
+		msg.returnStatus = 0;
+		msg.resetDataToggle = 0x0;
+		msg.enablePort = 0;
+		msg.disablePort = 0;
+	}
+
+	/* Do handshaking outputs */
+	msg.setRts = 0xff;
+	msg.rts = p_priv->rts_state;
+
+	msg.setDtr = 0xff;
+	msg.dtr = p_priv->dtr_state;
+
+	p_priv->resend_cont = 0;
+
+	/* if the device is a 49wg, we send control message on usb
+	   control EP 0 */
+
+	if (d_details->product_id == keyspan_usa49wg_product_id) {
+		dr = (void *)(s_priv->ctrl_buf);
+		dr->bRequestType = USB_TYPE_VENDOR | USB_DIR_OUT;
+		dr->bRequest = 0xB0;	/* 49wg control message */
+		dr->wValue = 0;
+		dr->wIndex = 0;
+		dr->wLength = cpu_to_le16(sizeof(msg));
+
+		memcpy(s_priv->glocont_buf, &msg, sizeof(msg));
+
+		usb_fill_control_urb(this_urb, serial->dev,
+				usb_sndctrlpipe(serial->dev, 0),
+				(unsigned char *)dr, s_priv->glocont_buf,
+				sizeof(msg), usa49_glocont_callback, serial);
+
+	} else {
+		memcpy(this_urb->transfer_buffer, &msg, sizeof(msg));
+
+		/* send the data out the device on control endpoint */
+		this_urb->transfer_buffer_length = sizeof(msg);
+	}
+	err = usb_submit_urb(this_urb, GFP_ATOMIC);
+	if (err != 0)
+		dev_dbg(&port->dev, "%s - usb_submit_urb(setup) failed (%d)\n", __func__, err);
+
+	return 0;
+}
+
+static int keyspan_usa90_send_setup(struct usb_serial *serial,
+				    struct usb_serial_port *port,
+				    int reset_port)
+{
+	struct keyspan_usa90_portControlMessage	msg;
+	struct keyspan_serial_private 		*s_priv;
+	struct keyspan_port_private 		*p_priv;
+	const struct keyspan_device_details	*d_details;
+	struct urb				*this_urb;
+	int 					err;
+	u8						prescaler;
+
+	s_priv = usb_get_serial_data(serial);
+	p_priv = usb_get_serial_port_data(port);
+	d_details = s_priv->device_details;
+
+	/* only do something if we have a bulk out endpoint */
+	this_urb = p_priv->outcont_urb;
+	if (this_urb == NULL) {
+		dev_dbg(&port->dev, "%s - oops no urb.\n", __func__);
+		return -1;
+	}
+
+	/* Save reset port val for resend.
+	   Don't overwrite resend for open/close condition. */
+	if ((reset_port + 1) > p_priv->resend_cont)
+		p_priv->resend_cont = reset_port + 1;
+	if (this_urb->status == -EINPROGRESS) {
+		dev_dbg(&port->dev, "%s already writing\n", __func__);
+		mdelay(5);
+		return -1;
+	}
+
+	memset(&msg, 0, sizeof(struct keyspan_usa90_portControlMessage));
+
+	/* Only set baud rate if it's changed */
+	if (p_priv->old_baud != p_priv->baud) {
+		p_priv->old_baud = p_priv->baud;
+		msg.setClocking = 0x01;
+		if (d_details->calculate_baud_rate(port, p_priv->baud, d_details->baudclk,
+						   &msg.baudHi, &msg.baudLo, &prescaler, 0) == KEYSPAN_INVALID_BAUD_RATE) {
+			dev_dbg(&port->dev, "%s - Invalid baud rate %d requested, using 9600.\n",
+				__func__, p_priv->baud);
+			p_priv->baud = 9600;
+			d_details->calculate_baud_rate(port, p_priv->baud, d_details->baudclk,
+				&msg.baudHi, &msg.baudLo, &prescaler, 0);
+		}
+		msg.setRxMode = 1;
+		msg.setTxMode = 1;
+	}
+
+	/* modes must always be correctly specified */
+	if (p_priv->baud > 57600) {
+		msg.rxMode = RXMODE_DMA;
+		msg.txMode = TXMODE_DMA;
+	} else {
+		msg.rxMode = RXMODE_BYHAND;
+		msg.txMode = TXMODE_BYHAND;
+	}
+
+	msg.lcr = (p_priv->cflag & CSTOPB) ? STOPBITS_678_2 : STOPBITS_5678_1;
+	switch (p_priv->cflag & CSIZE) {
+	case CS5:
+		msg.lcr |= USA_DATABITS_5;
+		break;
+	case CS6:
+		msg.lcr |= USA_DATABITS_6;
+		break;
+	case CS7:
+		msg.lcr |= USA_DATABITS_7;
+		break;
+	case CS8:
+		msg.lcr |= USA_DATABITS_8;
+		break;
+	}
+	if (p_priv->cflag & PARENB) {
+		/* note USA_PARITY_NONE == 0 */
+		msg.lcr |= (p_priv->cflag & PARODD) ?
+			USA_PARITY_ODD : USA_PARITY_EVEN;
+	}
+	if (p_priv->old_cflag != p_priv->cflag) {
+		p_priv->old_cflag = p_priv->cflag;
+		msg.setLcr = 0x01;
+	}
+
+	if (p_priv->flow_control == flow_cts)
+		msg.txFlowControl = TXFLOW_CTS;
+	msg.setTxFlowControl = 0x01;
+	msg.setRxFlowControl = 0x01;
+
+	msg.rxForwardingLength = 16;
+	msg.rxForwardingTimeout = 16;
+	msg.txAckSetting = 0;
+	msg.xonChar = 17;
+	msg.xoffChar = 19;
+
+	/* Opening port */
+	if (reset_port == 1) {
+		msg.portEnabled = 1;
+		msg.rxFlush = 1;
+		msg.txBreak = (p_priv->break_on);
+	}
+	/* Closing port */
+	else if (reset_port == 2)
+		msg.portEnabled = 0;
+	/* Sending intermediate configs */
+	else {
+		msg.portEnabled = 1;
+		msg.txBreak = (p_priv->break_on);
+	}
+
+	/* Do handshaking outputs */
+	msg.setRts = 0x01;
+	msg.rts = p_priv->rts_state;
+
+	msg.setDtr = 0x01;
+	msg.dtr = p_priv->dtr_state;
+
+	p_priv->resend_cont = 0;
+	memcpy(this_urb->transfer_buffer, &msg, sizeof(msg));
+
+	/* send the data out the device on control endpoint */
+	this_urb->transfer_buffer_length = sizeof(msg);
+
+	err = usb_submit_urb(this_urb, GFP_ATOMIC);
+	if (err != 0)
+		dev_dbg(&port->dev, "%s - usb_submit_urb(setup) failed (%d)\n", __func__, err);
+	return 0;
+}
+
+static int keyspan_usa67_send_setup(struct usb_serial *serial,
+				    struct usb_serial_port *port,
+				    int reset_port)
+{
+	struct keyspan_usa67_portControlMessage	msg;
+	struct keyspan_serial_private 		*s_priv;
+	struct keyspan_port_private 		*p_priv;
+	const struct keyspan_device_details	*d_details;
+	struct urb				*this_urb;
+	int 					err, device_port;
+
+	s_priv = usb_get_serial_data(serial);
+	p_priv = usb_get_serial_port_data(port);
+	d_details = s_priv->device_details;
+
+	this_urb = s_priv->glocont_urb;
+
+	/* Work out which port within the device is being setup */
+	device_port = port->port_number;
+
+	/* Make sure we have an urb then send the message */
+	if (this_urb == NULL) {
+		dev_dbg(&port->dev, "%s - oops no urb for port.\n", __func__);
+		return -1;
+	}
+
+	/* Save reset port val for resend.
+	   Don't overwrite resend for open/close condition. */
+	if ((reset_port + 1) > p_priv->resend_cont)
+		p_priv->resend_cont = reset_port + 1;
+	if (this_urb->status == -EINPROGRESS) {
+		/*  dev_dbg(&port->dev, "%s - already writing\n", __func__); */
+		mdelay(5);
+		return -1;
+	}
+
+	memset(&msg, 0, sizeof(struct keyspan_usa67_portControlMessage));
+
+	msg.port = device_port;
+
+	/* Only set baud rate if it's changed */
+	if (p_priv->old_baud != p_priv->baud) {
+		p_priv->old_baud = p_priv->baud;
+		msg.setClocking = 0xff;
+		if (d_details->calculate_baud_rate(port, p_priv->baud, d_details->baudclk,
+						   &msg.baudHi, &msg.baudLo, &msg.prescaler,
+						   device_port) == KEYSPAN_INVALID_BAUD_RATE) {
+			dev_dbg(&port->dev, "%s - Invalid baud rate %d requested, using 9600.\n",
+				__func__, p_priv->baud);
+			msg.baudLo = 0;
+			msg.baudHi = 125;	/* Values for 9600 baud */
+			msg.prescaler = 10;
+		}
+		msg.setPrescaler = 0xff;
+	}
+
+	msg.lcr = (p_priv->cflag & CSTOPB) ? STOPBITS_678_2 : STOPBITS_5678_1;
+	switch (p_priv->cflag & CSIZE) {
+	case CS5:
+		msg.lcr |= USA_DATABITS_5;
+		break;
+	case CS6:
+		msg.lcr |= USA_DATABITS_6;
+		break;
+	case CS7:
+		msg.lcr |= USA_DATABITS_7;
+		break;
+	case CS8:
+		msg.lcr |= USA_DATABITS_8;
+		break;
+	}
+	if (p_priv->cflag & PARENB) {
+		/* note USA_PARITY_NONE == 0 */
+		msg.lcr |= (p_priv->cflag & PARODD) ?
+					USA_PARITY_ODD : USA_PARITY_EVEN;
+	}
+	msg.setLcr = 0xff;
+
+	msg.ctsFlowControl = (p_priv->flow_control == flow_cts);
+	msg.xonFlowControl = 0;
+	msg.setFlowControl = 0xff;
+	msg.forwardingLength = 16;
+	msg.xonChar = 17;
+	msg.xoffChar = 19;
+
+	if (reset_port == 1) {
+		/* Opening port */
+		msg._txOn = 1;
+		msg._txOff = 0;
+		msg.txFlush = 0;
+		msg.txBreak = 0;
+		msg.rxOn = 1;
+		msg.rxOff = 0;
+		msg.rxFlush = 1;
+		msg.rxForward = 0;
+		msg.returnStatus = 0;
+		msg.resetDataToggle = 0xff;
+	} else if (reset_port == 2) {
+		/* Closing port */
+		msg._txOn = 0;
+		msg._txOff = 1;
+		msg.txFlush = 0;
+		msg.txBreak = 0;
+		msg.rxOn = 0;
+		msg.rxOff = 1;
+		msg.rxFlush = 1;
+		msg.rxForward = 0;
+		msg.returnStatus = 0;
+		msg.resetDataToggle = 0;
+	} else {
+		/* Sending intermediate configs */
+		msg._txOn = (!p_priv->break_on);
+		msg._txOff = 0;
+		msg.txFlush = 0;
+		msg.txBreak = (p_priv->break_on);
+		msg.rxOn = 0;
+		msg.rxOff = 0;
+		msg.rxFlush = 0;
+		msg.rxForward = 0;
+		msg.returnStatus = 0;
+		msg.resetDataToggle = 0x0;
+	}
+
+	/* Do handshaking outputs */
+	msg.setTxTriState_setRts = 0xff;
+	msg.txTriState_rts = p_priv->rts_state;
+
+	msg.setHskoa_setDtr = 0xff;
+	msg.hskoa_dtr = p_priv->dtr_state;
+
+	p_priv->resend_cont = 0;
+
+	memcpy(this_urb->transfer_buffer, &msg, sizeof(msg));
+
+	/* send the data out the device on control endpoint */
+	this_urb->transfer_buffer_length = sizeof(msg);
+
+	err = usb_submit_urb(this_urb, GFP_ATOMIC);
+	if (err != 0)
+		dev_dbg(&port->dev, "%s - usb_submit_urb(setup) failed (%d)\n", __func__, err);
+	return 0;
+}
+
+static void keyspan_send_setup(struct usb_serial_port *port, int reset_port)
+{
+	struct usb_serial *serial = port->serial;
+	struct keyspan_serial_private *s_priv;
+	const struct keyspan_device_details *d_details;
+
+	s_priv = usb_get_serial_data(serial);
+	d_details = s_priv->device_details;
+
+	switch (d_details->msg_format) {
+	case msg_usa26:
+		keyspan_usa26_send_setup(serial, port, reset_port);
+		break;
+	case msg_usa28:
+		keyspan_usa28_send_setup(serial, port, reset_port);
+		break;
+	case msg_usa49:
+		keyspan_usa49_send_setup(serial, port, reset_port);
+		break;
+	case msg_usa90:
+		keyspan_usa90_send_setup(serial, port, reset_port);
+		break;
+	case msg_usa67:
+		keyspan_usa67_send_setup(serial, port, reset_port);
+		break;
+	}
+}
+
+
+/* Gets called by the "real" driver (ie once firmware is loaded
+   and renumeration has taken place. */
+static int keyspan_startup(struct usb_serial *serial)
+{
+	int				i, err;
+	struct keyspan_serial_private 	*s_priv;
+	const struct keyspan_device_details	*d_details;
+
+	for (i = 0; (d_details = keyspan_devices[i]) != NULL; ++i)
+		if (d_details->product_id ==
+				le16_to_cpu(serial->dev->descriptor.idProduct))
+			break;
+	if (d_details == NULL) {
+		dev_err(&serial->dev->dev, "%s - unknown product id %x\n",
+		    __func__, le16_to_cpu(serial->dev->descriptor.idProduct));
+		return -ENODEV;
+	}
+
+	/* Setup private data for serial driver */
+	s_priv = kzalloc(sizeof(struct keyspan_serial_private), GFP_KERNEL);
+	if (!s_priv)
+		return -ENOMEM;
+
+	s_priv->instat_buf = kzalloc(INSTAT_BUFLEN, GFP_KERNEL);
+	if (!s_priv->instat_buf)
+		goto err_instat_buf;
+
+	s_priv->indat_buf = kzalloc(INDAT49W_BUFLEN, GFP_KERNEL);
+	if (!s_priv->indat_buf)
+		goto err_indat_buf;
+
+	s_priv->glocont_buf = kzalloc(GLOCONT_BUFLEN, GFP_KERNEL);
+	if (!s_priv->glocont_buf)
+		goto err_glocont_buf;
+
+	s_priv->ctrl_buf = kzalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL);
+	if (!s_priv->ctrl_buf)
+		goto err_ctrl_buf;
+
+	s_priv->device_details = d_details;
+	usb_set_serial_data(serial, s_priv);
+
+	keyspan_setup_urbs(serial);
+
+	if (s_priv->instat_urb != NULL) {
+		err = usb_submit_urb(s_priv->instat_urb, GFP_KERNEL);
+		if (err != 0)
+			dev_dbg(&serial->dev->dev, "%s - submit instat urb failed %d\n", __func__, err);
+	}
+	if (s_priv->indat_urb != NULL) {
+		err = usb_submit_urb(s_priv->indat_urb, GFP_KERNEL);
+		if (err != 0)
+			dev_dbg(&serial->dev->dev, "%s - submit indat urb failed %d\n", __func__, err);
+	}
+
+	return 0;
+
+err_ctrl_buf:
+	kfree(s_priv->glocont_buf);
+err_glocont_buf:
+	kfree(s_priv->indat_buf);
+err_indat_buf:
+	kfree(s_priv->instat_buf);
+err_instat_buf:
+	kfree(s_priv);
+
+	return -ENOMEM;
+}
+
+static void keyspan_disconnect(struct usb_serial *serial)
+{
+	struct keyspan_serial_private *s_priv;
+
+	s_priv = usb_get_serial_data(serial);
+
+	usb_kill_urb(s_priv->instat_urb);
+	usb_kill_urb(s_priv->glocont_urb);
+	usb_kill_urb(s_priv->indat_urb);
+}
+
+static void keyspan_release(struct usb_serial *serial)
+{
+	struct keyspan_serial_private *s_priv;
+
+	s_priv = usb_get_serial_data(serial);
+
+	/* Make sure to unlink the URBs submitted in attach. */
+	usb_kill_urb(s_priv->instat_urb);
+	usb_kill_urb(s_priv->indat_urb);
+
+	usb_free_urb(s_priv->instat_urb);
+	usb_free_urb(s_priv->indat_urb);
+	usb_free_urb(s_priv->glocont_urb);
+
+	kfree(s_priv->ctrl_buf);
+	kfree(s_priv->glocont_buf);
+	kfree(s_priv->indat_buf);
+	kfree(s_priv->instat_buf);
+
+	kfree(s_priv);
+}
+
+static int keyspan_port_probe(struct usb_serial_port *port)
+{
+	struct usb_serial *serial = port->serial;
+	struct keyspan_serial_private *s_priv;
+	struct keyspan_port_private *p_priv;
+	const struct keyspan_device_details *d_details;
+	struct callbacks *cback;
+	int endp;
+	int port_num;
+	int i;
+
+	s_priv = usb_get_serial_data(serial);
+	d_details = s_priv->device_details;
+
+	p_priv = kzalloc(sizeof(*p_priv), GFP_KERNEL);
+	if (!p_priv)
+		return -ENOMEM;
+
+	for (i = 0; i < ARRAY_SIZE(p_priv->in_buffer); ++i) {
+		p_priv->in_buffer[i] = kzalloc(IN_BUFLEN, GFP_KERNEL);
+		if (!p_priv->in_buffer[i])
+			goto err_free_in_buffer;
+	}
+
+	for (i = 0; i < ARRAY_SIZE(p_priv->out_buffer); ++i) {
+		p_priv->out_buffer[i] = kzalloc(OUT_BUFLEN, GFP_KERNEL);
+		if (!p_priv->out_buffer[i])
+			goto err_free_out_buffer;
+	}
+
+	p_priv->inack_buffer = kzalloc(INACK_BUFLEN, GFP_KERNEL);
+	if (!p_priv->inack_buffer)
+		goto err_free_out_buffer;
+
+	p_priv->outcont_buffer = kzalloc(OUTCONT_BUFLEN, GFP_KERNEL);
+	if (!p_priv->outcont_buffer)
+		goto err_free_inack_buffer;
+
+	p_priv->device_details = d_details;
+
+	/* Setup values for the various callback routines */
+	cback = &keyspan_callbacks[d_details->msg_format];
+
+	port_num = port->port_number;
+
+	/* Do indat endpoints first, once for each flip */
+	endp = d_details->indat_endpoints[port_num];
+	for (i = 0; i <= d_details->indat_endp_flip; ++i, ++endp) {
+		p_priv->in_urbs[i] = keyspan_setup_urb(serial, endp,
+						USB_DIR_IN, port,
+						p_priv->in_buffer[i],
+						IN_BUFLEN,
+						cback->indat_callback);
+	}
+	/* outdat endpoints also have flip */
+	endp = d_details->outdat_endpoints[port_num];
+	for (i = 0; i <= d_details->outdat_endp_flip; ++i, ++endp) {
+		p_priv->out_urbs[i] = keyspan_setup_urb(serial, endp,
+						USB_DIR_OUT, port,
+						p_priv->out_buffer[i],
+						OUT_BUFLEN,
+						cback->outdat_callback);
+	}
+	/* inack endpoint */
+	p_priv->inack_urb = keyspan_setup_urb(serial,
+					d_details->inack_endpoints[port_num],
+					USB_DIR_IN, port,
+					p_priv->inack_buffer,
+					INACK_BUFLEN,
+					cback->inack_callback);
+	/* outcont endpoint */
+	p_priv->outcont_urb = keyspan_setup_urb(serial,
+					d_details->outcont_endpoints[port_num],
+					USB_DIR_OUT, port,
+					p_priv->outcont_buffer,
+					OUTCONT_BUFLEN,
+					 cback->outcont_callback);
+
+	usb_set_serial_port_data(port, p_priv);
+
+	return 0;
+
+err_free_inack_buffer:
+	kfree(p_priv->inack_buffer);
+err_free_out_buffer:
+	for (i = 0; i < ARRAY_SIZE(p_priv->out_buffer); ++i)
+		kfree(p_priv->out_buffer[i]);
+err_free_in_buffer:
+	for (i = 0; i < ARRAY_SIZE(p_priv->in_buffer); ++i)
+		kfree(p_priv->in_buffer[i]);
+	kfree(p_priv);
+
+	return -ENOMEM;
+}
+
+static int keyspan_port_remove(struct usb_serial_port *port)
+{
+	struct keyspan_port_private *p_priv;
+	int i;
+
+	p_priv = usb_get_serial_port_data(port);
+
+	usb_kill_urb(p_priv->inack_urb);
+	usb_kill_urb(p_priv->outcont_urb);
+	for (i = 0; i < 2; i++) {
+		usb_kill_urb(p_priv->in_urbs[i]);
+		usb_kill_urb(p_priv->out_urbs[i]);
+	}
+
+	usb_free_urb(p_priv->inack_urb);
+	usb_free_urb(p_priv->outcont_urb);
+	for (i = 0; i < 2; i++) {
+		usb_free_urb(p_priv->in_urbs[i]);
+		usb_free_urb(p_priv->out_urbs[i]);
+	}
+
+	kfree(p_priv->outcont_buffer);
+	kfree(p_priv->inack_buffer);
+	for (i = 0; i < ARRAY_SIZE(p_priv->out_buffer); ++i)
+		kfree(p_priv->out_buffer[i]);
+	for (i = 0; i < ARRAY_SIZE(p_priv->in_buffer); ++i)
+		kfree(p_priv->in_buffer[i]);
+
+	kfree(p_priv);
+
+	return 0;
+}
+
+/* Structs for the devices, pre and post renumeration. */
+static struct usb_serial_driver keyspan_pre_device = {
+	.driver = {
+		.owner		= THIS_MODULE,
+		.name		= "keyspan_no_firm",
+	},
+	.description		= "Keyspan - (without firmware)",
+	.id_table		= keyspan_pre_ids,
+	.num_ports		= 1,
+	.attach			= keyspan_fake_startup,
+};
+
+static struct usb_serial_driver keyspan_1port_device = {
+	.driver = {
+		.owner		= THIS_MODULE,
+		.name		= "keyspan_1",
+	},
+	.description		= "Keyspan 1 port adapter",
+	.id_table		= keyspan_1port_ids,
+	.num_ports		= 1,
+	.open			= keyspan_open,
+	.close			= keyspan_close,
+	.dtr_rts		= keyspan_dtr_rts,
+	.write			= keyspan_write,
+	.write_room		= keyspan_write_room,
+	.set_termios		= keyspan_set_termios,
+	.break_ctl		= keyspan_break_ctl,
+	.tiocmget		= keyspan_tiocmget,
+	.tiocmset		= keyspan_tiocmset,
+	.attach			= keyspan_startup,
+	.disconnect		= keyspan_disconnect,
+	.release		= keyspan_release,
+	.port_probe		= keyspan_port_probe,
+	.port_remove		= keyspan_port_remove,
+};
+
+static struct usb_serial_driver keyspan_2port_device = {
+	.driver = {
+		.owner		= THIS_MODULE,
+		.name		= "keyspan_2",
+	},
+	.description		= "Keyspan 2 port adapter",
+	.id_table		= keyspan_2port_ids,
+	.num_ports		= 2,
+	.open			= keyspan_open,
+	.close			= keyspan_close,
+	.dtr_rts		= keyspan_dtr_rts,
+	.write			= keyspan_write,
+	.write_room		= keyspan_write_room,
+	.set_termios		= keyspan_set_termios,
+	.break_ctl		= keyspan_break_ctl,
+	.tiocmget		= keyspan_tiocmget,
+	.tiocmset		= keyspan_tiocmset,
+	.attach			= keyspan_startup,
+	.disconnect		= keyspan_disconnect,
+	.release		= keyspan_release,
+	.port_probe		= keyspan_port_probe,
+	.port_remove		= keyspan_port_remove,
+};
+
+static struct usb_serial_driver keyspan_4port_device = {
+	.driver = {
+		.owner		= THIS_MODULE,
+		.name		= "keyspan_4",
+	},
+	.description		= "Keyspan 4 port adapter",
+	.id_table		= keyspan_4port_ids,
+	.num_ports		= 4,
+	.open			= keyspan_open,
+	.close			= keyspan_close,
+	.dtr_rts		= keyspan_dtr_rts,
+	.write			= keyspan_write,
+	.write_room		= keyspan_write_room,
+	.set_termios		= keyspan_set_termios,
+	.break_ctl		= keyspan_break_ctl,
+	.tiocmget		= keyspan_tiocmget,
+	.tiocmset		= keyspan_tiocmset,
+	.attach			= keyspan_startup,
+	.disconnect		= keyspan_disconnect,
+	.release		= keyspan_release,
+	.port_probe		= keyspan_port_probe,
+	.port_remove		= keyspan_port_remove,
+};
+
+static struct usb_serial_driver * const serial_drivers[] = {
+	&keyspan_pre_device, &keyspan_1port_device,
+	&keyspan_2port_device, &keyspan_4port_device, NULL
+};
+
+module_usb_serial_driver(serial_drivers, keyspan_ids_combined);
+
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE("GPL");
+
+MODULE_FIRMWARE("keyspan/usa28.fw");
+MODULE_FIRMWARE("keyspan/usa28x.fw");
+MODULE_FIRMWARE("keyspan/usa28xa.fw");
+MODULE_FIRMWARE("keyspan/usa28xb.fw");
+MODULE_FIRMWARE("keyspan/usa19.fw");
+MODULE_FIRMWARE("keyspan/usa19qi.fw");
+MODULE_FIRMWARE("keyspan/mpr.fw");
+MODULE_FIRMWARE("keyspan/usa19qw.fw");
+MODULE_FIRMWARE("keyspan/usa18x.fw");
+MODULE_FIRMWARE("keyspan/usa19w.fw");
+MODULE_FIRMWARE("keyspan/usa49w.fw");
+MODULE_FIRMWARE("keyspan/usa49wlc.fw");