Merge branch 'master' of /home/davem/src/GIT/linux-2.6/

Conflicts:
	drivers/net/wimax/i2400m/usb-notif.c

1 files changed, 822 insertions, 0 deletions

diff --git a/drivers/usb/serial/cp210x.c b/drivers/usb/serial/cp210x.c
new file mode 100644
index 00000000000..e8d5133ce9c
--- /dev/null
+++ b/drivers/usb/serial/cp210x.c
@@ -0,0 +1,822 @@
+/*
+ * Silicon Laboratories CP2101/CP2102 USB to RS232 serial adaptor driver
+ *
+ * Copyright (C) 2005 Craig Shelley (craig@microtron.org.uk)
+ *
+ *	This program is free software; you can redistribute it and/or
+ *	modify it under the terms of the GNU General Public License version
+ *	2 as published by the Free Software Foundation.
+ *
+ * Support to set flow control line levels using TIOCMGET and TIOCMSET
+ * thanks to Karl Hiramoto karl@hiramoto.org. RTSCTS hardware flow
+ * control thanks to Munir Nassar nassarmu@real-time.com
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/slab.h>
+#include <linux/tty.h>
+#include <linux/tty_flip.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/usb.h>
+#include <linux/uaccess.h>
+#include <linux/usb/serial.h>
+
+/*
+ * Version Information
+ */
+#define DRIVER_VERSION "v0.08"
+#define DRIVER_DESC "Silicon Labs CP2101/CP2102 RS232 serial adaptor driver"
+
+/*
+ * Function Prototypes
+ */
+static int cp2101_open(struct tty_struct *, struct usb_serial_port *,
+							struct file *);
+static void cp2101_cleanup(struct usb_serial_port *);
+static void cp2101_close(struct tty_struct *, struct usb_serial_port *,
+							struct file*);
+static void cp2101_get_termios(struct tty_struct *,
+	struct usb_serial_port *port);
+static void cp2101_get_termios_port(struct usb_serial_port *port,
+	unsigned int *cflagp, unsigned int *baudp);
+static void cp2101_set_termios(struct tty_struct *, struct usb_serial_port *,
+							struct ktermios*);
+static int cp2101_tiocmget(struct tty_struct *, struct file *);
+static int cp2101_tiocmset(struct tty_struct *, struct file *,
+		unsigned int, unsigned int);
+static int cp2101_tiocmset_port(struct usb_serial_port *port, struct file *,
+		unsigned int, unsigned int);
+static void cp2101_break_ctl(struct tty_struct *, int);
+static int cp2101_startup(struct usb_serial *);
+static void cp2101_shutdown(struct usb_serial *);
+
+static int debug;
+
+static struct usb_device_id id_table [] = {
+	{ USB_DEVICE(0x0471, 0x066A) }, /* AKTAKOM ACE-1001 cable */
+	{ USB_DEVICE(0x0489, 0xE000) }, /* Pirelli Broadband S.p.A, DP-L10 SIP/GSM Mobile */
+	{ USB_DEVICE(0x08e6, 0x5501) }, /* Gemalto Prox-PU/CU contactless smartcard reader */
+	{ USB_DEVICE(0x0FCF, 0x1003) }, /* Dynastream ANT development board */
+	{ USB_DEVICE(0x0FCF, 0x1004) }, /* Dynastream ANT2USB */
+	{ USB_DEVICE(0x0FCF, 0x1006) }, /* Dynastream ANT development board */
+	{ USB_DEVICE(0x10A6, 0xAA26) }, /* Knock-off DCU-11 cable */
+	{ USB_DEVICE(0x10AB, 0x10C5) }, /* Siemens MC60 Cable */
+	{ USB_DEVICE(0x10B5, 0xAC70) }, /* Nokia CA-42 USB */
+	{ USB_DEVICE(0x10C4, 0x800A) }, /* SPORTident BSM7-D-USB main station */
+	{ USB_DEVICE(0x10C4, 0x803B) }, /* Pololu USB-serial converter */
+	{ USB_DEVICE(0x10C4, 0x8053) }, /* Enfora EDG1228 */
+	{ USB_DEVICE(0x10C4, 0x8054) }, /* Enfora GSM2228 */
+	{ USB_DEVICE(0x10C4, 0x8066) }, /* Argussoft In-System Programmer */
+	{ USB_DEVICE(0x10C4, 0x807A) }, /* Crumb128 board */
+	{ USB_DEVICE(0x10C4, 0x80CA) }, /* Degree Controls Inc */
+	{ USB_DEVICE(0x10C4, 0x80DD) }, /* Tracient RFID */
+	{ USB_DEVICE(0x10C4, 0x80F6) }, /* Suunto sports instrument */
+	{ USB_DEVICE(0x10C4, 0x8115) }, /* Arygon NFC/Mifare Reader */
+	{ USB_DEVICE(0x10C4, 0x813D) }, /* Burnside Telecom Deskmobile */
+	{ USB_DEVICE(0x10C4, 0x814A) }, /* West Mountain Radio RIGblaster P&P */
+	{ USB_DEVICE(0x10C4, 0x814B) }, /* West Mountain Radio RIGtalk */
+	{ USB_DEVICE(0x10C4, 0x815E) }, /* Helicomm IP-Link 1220-DVM */
+	{ USB_DEVICE(0x10C4, 0x819F) }, /* MJS USB Toslink Switcher */
+	{ USB_DEVICE(0x10C4, 0x81A6) }, /* ThinkOptics WavIt */
+	{ USB_DEVICE(0x10C4, 0x81AC) }, /* MSD Dash Hawk */
+	{ USB_DEVICE(0x10C4, 0x81C8) }, /* Lipowsky Industrie Elektronik GmbH, Baby-JTAG */
+	{ USB_DEVICE(0x10C4, 0x81E2) }, /* Lipowsky Industrie Elektronik GmbH, Baby-LIN */
+	{ USB_DEVICE(0x10C4, 0x81E7) }, /* Aerocomm Radio */
+	{ USB_DEVICE(0x10C4, 0x8218) }, /* Lipowsky Industrie Elektronik GmbH, HARP-1 */
+	{ USB_DEVICE(0x10C4, 0x822B) }, /* Modem EDGE(GSM) Comander 2 */
+	{ USB_DEVICE(0x10C4, 0x826B) }, /* Cygnal Integrated Products, Inc., Fasttrax GPS demostration module */
+	{ USB_DEVICE(0x10c4, 0x8293) }, /* Telegesys ETRX2USB */
+	{ USB_DEVICE(0x10C4, 0x8341) }, /* Siemens MC35PU GPRS Modem */
+	{ USB_DEVICE(0x10C4, 0x83A8) }, /* Amber Wireless AMB2560 */
+	{ USB_DEVICE(0x10C4, 0x846E) }, /* BEI USB Sensor Interface (VCP) */
+	{ USB_DEVICE(0x10C4, 0xEA60) }, /* Silicon Labs factory default */
+	{ USB_DEVICE(0x10C4, 0xEA61) }, /* Silicon Labs factory default */
+	{ USB_DEVICE(0x10C4, 0xF001) }, /* Elan Digital Systems USBscope50 */
+	{ USB_DEVICE(0x10C4, 0xF002) }, /* Elan Digital Systems USBwave12 */
+	{ USB_DEVICE(0x10C4, 0xF003) }, /* Elan Digital Systems USBpulse100 */
+	{ USB_DEVICE(0x10C4, 0xF004) }, /* Elan Digital Systems USBcount50 */
+	{ USB_DEVICE(0x10C5, 0xEA61) }, /* Silicon Labs MobiData GPRS USB Modem */
+	{ USB_DEVICE(0x13AD, 0x9999) }, /* Baltech card reader */
+	{ USB_DEVICE(0x166A, 0x0303) }, /* Clipsal 5500PCU C-Bus USB interface */
+	{ USB_DEVICE(0x16D6, 0x0001) }, /* Jablotron serial interface */
+	{ USB_DEVICE(0x18EF, 0xE00F) }, /* ELV USB-I2C-Interface */
+	{ } /* Terminating Entry */
+};
+
+MODULE_DEVICE_TABLE(usb, id_table);
+
+static struct usb_driver cp2101_driver = {
+	.name		= "cp2101",
+	.probe		= usb_serial_probe,
+	.disconnect	= usb_serial_disconnect,
+	.id_table	= id_table,
+	.no_dynamic_id	= 	1,
+};
+
+static struct usb_serial_driver cp2101_device = {
+	.driver = {
+		.owner =	THIS_MODULE,
+		.name = 	"cp2101",
+	},
+	.usb_driver		= &cp2101_driver,
+	.id_table		= id_table,
+	.num_ports		= 1,
+	.open			= cp2101_open,
+	.close			= cp2101_close,
+	.break_ctl		= cp2101_break_ctl,
+	.set_termios		= cp2101_set_termios,
+	.tiocmget 		= cp2101_tiocmget,
+	.tiocmset		= cp2101_tiocmset,
+	.attach			= cp2101_startup,
+	.shutdown		= cp2101_shutdown,
+};
+
+/* Config request types */
+#define REQTYPE_HOST_TO_DEVICE	0x41
+#define REQTYPE_DEVICE_TO_HOST	0xc1
+
+/* Config SET requests. To GET, add 1 to the request number */
+#define CP2101_UART 		0x00	/* Enable / Disable */
+#define CP2101_BAUDRATE		0x01	/* (BAUD_RATE_GEN_FREQ / baudrate) */
+#define CP2101_BITS		0x03	/* 0x(0)(databits)(parity)(stopbits) */
+#define CP2101_BREAK		0x05	/* On / Off */
+#define CP2101_CONTROL		0x07	/* Flow control line states */
+#define CP2101_MODEMCTL		0x13	/* Modem controls */
+#define CP2101_CONFIG_6		0x19	/* 6 bytes of config data ??? */
+
+/* CP2101_UART */
+#define UART_ENABLE		0x0001
+#define UART_DISABLE		0x0000
+
+/* CP2101_BAUDRATE */
+#define BAUD_RATE_GEN_FREQ	0x384000
+
+/* CP2101_BITS */
+#define BITS_DATA_MASK		0X0f00
+#define BITS_DATA_5		0X0500
+#define BITS_DATA_6		0X0600
+#define BITS_DATA_7		0X0700
+#define BITS_DATA_8		0X0800
+#define BITS_DATA_9		0X0900
+
+#define BITS_PARITY_MASK	0x00f0
+#define BITS_PARITY_NONE	0x0000
+#define BITS_PARITY_ODD		0x0010
+#define BITS_PARITY_EVEN	0x0020
+#define BITS_PARITY_MARK	0x0030
+#define BITS_PARITY_SPACE	0x0040
+
+#define BITS_STOP_MASK		0x000f
+#define BITS_STOP_1		0x0000
+#define BITS_STOP_1_5		0x0001
+#define BITS_STOP_2		0x0002
+
+/* CP2101_BREAK */
+#define BREAK_ON		0x0000
+#define BREAK_OFF		0x0001
+
+/* CP2101_CONTROL */
+#define CONTROL_DTR		0x0001
+#define CONTROL_RTS		0x0002
+#define CONTROL_CTS		0x0010
+#define CONTROL_DSR		0x0020
+#define CONTROL_RING		0x0040
+#define CONTROL_DCD		0x0080
+#define CONTROL_WRITE_DTR	0x0100
+#define CONTROL_WRITE_RTS	0x0200
+
+/*
+ * cp2101_get_config
+ * Reads from the CP2101 configuration registers
+ * 'size' is specified in bytes.
+ * 'data' is a pointer to a pre-allocated array of integers large
+ * enough to hold 'size' bytes (with 4 bytes to each integer)
+ */
+static int cp2101_get_config(struct usb_serial_port *port, u8 request,
+		unsigned int *data, int size)
+{
+	struct usb_serial *serial = port->serial;
+	__le32 *buf;
+	int result, i, length;
+
+	/* Number of integers required to contain the array */
+	length = (((size - 1) | 3) + 1)/4;
+
+	buf = kcalloc(length, sizeof(__le32), GFP_KERNEL);
+	if (!buf) {
+		dev_err(&port->dev, "%s - out of memory.\n", __func__);
+		return -ENOMEM;
+	}
+
+	/* For get requests, the request number must be incremented */
+	request++;
+
+	/* Issue the request, attempting to read 'size' bytes */
+	result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
+				request, REQTYPE_DEVICE_TO_HOST, 0x0000,
+				0, buf, size, 300);
+
+	/* Convert data into an array of integers */
+	for (i = 0; i < length; i++)
+		data[i] = le32_to_cpu(buf[i]);
+
+	kfree(buf);
+
+	if (result != size) {
+		dbg("%s - Unable to send config request, "
+				"request=0x%x size=%d result=%d\n",
+				__func__, request, size, result);
+		return -EPROTO;
+	}
+
+	return 0;
+}
+
+/*
+ * cp2101_set_config
+ * Writes to the CP2101 configuration registers
+ * Values less than 16 bits wide are sent directly
+ * 'size' is specified in bytes.
+ */
+static int cp2101_set_config(struct usb_serial_port *port, u8 request,
+		unsigned int *data, int size)
+{
+	struct usb_serial *serial = port->serial;
+	__le32 *buf;
+	int result, i, length;
+
+	/* Number of integers required to contain the array */
+	length = (((size - 1) | 3) + 1)/4;
+
+	buf = kmalloc(length * sizeof(__le32), GFP_KERNEL);
+	if (!buf) {
+		dev_err(&port->dev, "%s - out of memory.\n",
+				__func__);
+		return -ENOMEM;
+	}
+
+	/* Array of integers into bytes */
+	for (i = 0; i < length; i++)
+		buf[i] = cpu_to_le32(data[i]);
+
+	if (size > 2) {
+		result = usb_control_msg(serial->dev,
+				usb_sndctrlpipe(serial->dev, 0),
+				request, REQTYPE_HOST_TO_DEVICE, 0x0000,
+				0, buf, size, 300);
+	} else {
+		result = usb_control_msg(serial->dev,
+				usb_sndctrlpipe(serial->dev, 0),
+				request, REQTYPE_HOST_TO_DEVICE, data[0],
+				0, NULL, 0, 300);
+	}
+
+	kfree(buf);
+
+	if ((size > 2 && result != size) || result < 0) {
+		dbg("%s - Unable to send request, "
+				"request=0x%x size=%d result=%d\n",
+				__func__, request, size, result);
+		return -EPROTO;
+	}
+
+	/* Single data value */
+	result = usb_control_msg(serial->dev,
+			usb_sndctrlpipe(serial->dev, 0),
+			request, REQTYPE_HOST_TO_DEVICE, data[0],
+			0, NULL, 0, 300);
+	return 0;
+}
+
+/*
+ * cp2101_set_config_single
+ * Convenience function for calling cp2101_set_config on single data values
+ * without requiring an integer pointer
+ */
+static inline int cp2101_set_config_single(struct usb_serial_port *port,
+		u8 request, unsigned int data)
+{
+	return cp2101_set_config(port, request, &data, 2);
+}
+
+/*
+ * cp2101_quantise_baudrate
+ * Quantises the baud rate as per AN205 Table 1
+ */
+static unsigned int cp2101_quantise_baudrate(unsigned int baud) {
+	if      (baud <= 56)       baud = 0;
+	else if (baud <= 300)      baud = 300;
+	else if (baud <= 600)      baud = 600;
+	else if (baud <= 1200)     baud = 1200;
+	else if (baud <= 1800)     baud = 1800;
+	else if (baud <= 2400)     baud = 2400;
+	else if (baud <= 4000)     baud = 4000;
+	else if (baud <= 4803)     baud = 4800;
+	else if (baud <= 7207)     baud = 7200;
+	else if (baud <= 9612)     baud = 9600;
+	else if (baud <= 14428)    baud = 14400;
+	else if (baud <= 16062)    baud = 16000;
+	else if (baud <= 19250)    baud = 19200;
+	else if (baud <= 28912)    baud = 28800;
+	else if (baud <= 38601)    baud = 38400;
+	else if (baud <= 51558)    baud = 51200;
+	else if (baud <= 56280)    baud = 56000;
+	else if (baud <= 58053)    baud = 57600;
+	else if (baud <= 64111)    baud = 64000;
+	else if (baud <= 77608)    baud = 76800;
+	else if (baud <= 117028)   baud = 115200;
+	else if (baud <= 129347)   baud = 128000;
+	else if (baud <= 156868)   baud = 153600;
+	else if (baud <= 237832)   baud = 230400;
+	else if (baud <= 254234)   baud = 250000;
+	else if (baud <= 273066)   baud = 256000;
+	else if (baud <= 491520)   baud = 460800;
+	else if (baud <= 567138)   baud = 500000;
+	else if (baud <= 670254)   baud = 576000;
+	else if (baud <= 1053257)  baud = 921600;
+	else if (baud <= 1474560)  baud = 1228800;
+	else if (baud <= 2457600)  baud = 1843200;
+	else                       baud = 3686400;
+	return baud;
+}
+
+static int cp2101_open(struct tty_struct *tty, struct usb_serial_port *port,
+				struct file *filp)
+{
+	struct usb_serial *serial = port->serial;
+	int result;
+
+	dbg("%s - port %d", __func__, port->number);
+
+	if (cp2101_set_config_single(port, CP2101_UART, UART_ENABLE)) {
+		dev_err(&port->dev, "%s - Unable to enable UART\n",
+				__func__);
+		return -EPROTO;
+	}
+
+	/* Start reading from the device */
+	usb_fill_bulk_urb(port->read_urb, serial->dev,
+			usb_rcvbulkpipe(serial->dev,
+			port->bulk_in_endpointAddress),
+			port->read_urb->transfer_buffer,
+			port->read_urb->transfer_buffer_length,
+			serial->type->read_bulk_callback,
+			port);
+	result = usb_submit_urb(port->read_urb, GFP_KERNEL);
+	if (result) {
+		dev_err(&port->dev, "%s - failed resubmitting read urb, "
+				"error %d\n", __func__, result);
+		return result;
+	}
+
+	/* Configure the termios structure */
+	cp2101_get_termios(tty, port);
+
+	/* Set the DTR and RTS pins low */
+	cp2101_tiocmset_port(tty ? (struct usb_serial_port *) tty->driver_data
+			: port,
+		NULL, TIOCM_DTR | TIOCM_RTS, 0);
+
+	return 0;
+}
+
+static void cp2101_cleanup(struct usb_serial_port *port)
+{
+	struct usb_serial *serial = port->serial;
+
+	dbg("%s - port %d", __func__, port->number);
+
+	if (serial->dev) {
+		/* shutdown any bulk reads that might be going on */
+		if (serial->num_bulk_out)
+			usb_kill_urb(port->write_urb);
+		if (serial->num_bulk_in)
+			usb_kill_urb(port->read_urb);
+	}
+}
+
+static void cp2101_close(struct tty_struct *tty, struct usb_serial_port *port,
+					struct file *filp)
+{
+	dbg("%s - port %d", __func__, port->number);
+
+	/* shutdown our urbs */
+	dbg("%s - shutting down urbs", __func__);
+	usb_kill_urb(port->write_urb);
+	usb_kill_urb(port->read_urb);
+
+	mutex_lock(&port->serial->disc_mutex);
+	if (!port->serial->disconnected)
+		cp2101_set_config_single(port, CP2101_UART, UART_DISABLE);
+	mutex_unlock(&port->serial->disc_mutex);
+}
+
+/*
+ * cp2101_get_termios
+ * Reads the baud rate, data bits, parity, stop bits and flow control mode
+ * from the device, corrects any unsupported values, and configures the
+ * termios structure to reflect the state of the device
+ */
+static void cp2101_get_termios(struct tty_struct *tty,
+	struct usb_serial_port *port)
+{
+	unsigned int baud;
+
+	if (tty) {
+		cp2101_get_termios_port(tty->driver_data,
+			&tty->termios->c_cflag, &baud);
+		tty_encode_baud_rate(tty, baud, baud);
+	}
+
+	else {
+		unsigned int cflag;
+		cflag = 0;
+		cp2101_get_termios_port(port, &cflag, &baud);
+	}
+}
+
+/*
+ * cp2101_get_termios_port
+ * This is the heart of cp2101_get_termios which always uses a &usb_serial_port.
+ */
+static void cp2101_get_termios_port(struct usb_serial_port *port,
+	unsigned int *cflagp, unsigned int *baudp)
+{
+	unsigned int cflag, modem_ctl[4];
+	unsigned int baud;
+	unsigned int bits;
+
+	dbg("%s - port %d", __func__, port->number);
+
+	cp2101_get_config(port, CP2101_BAUDRATE, &baud, 2);
+	/* Convert to baudrate */
+	if (baud)
+		baud = cp2101_quantise_baudrate((BAUD_RATE_GEN_FREQ + baud/2)/ baud);
+
+	dbg("%s - baud rate = %d", __func__, baud);
+	*baudp = baud;
+
+	cflag = *cflagp;
+
+	cp2101_get_config(port, CP2101_BITS, &bits, 2);
+	cflag &= ~CSIZE;
+	switch (bits & BITS_DATA_MASK) {
+	case BITS_DATA_5:
+		dbg("%s - data bits = 5", __func__);
+		cflag |= CS5;
+		break;
+	case BITS_DATA_6:
+		dbg("%s - data bits = 6", __func__);
+		cflag |= CS6;
+		break;
+	case BITS_DATA_7:
+		dbg("%s - data bits = 7", __func__);
+		cflag |= CS7;
+		break;
+	case BITS_DATA_8:
+		dbg("%s - data bits = 8", __func__);
+		cflag |= CS8;
+		break;
+	case BITS_DATA_9:
+		dbg("%s - data bits = 9 (not supported, using 8 data bits)",
+								__func__);
+		cflag |= CS8;
+		bits &= ~BITS_DATA_MASK;
+		bits |= BITS_DATA_8;
+		cp2101_set_config(port, CP2101_BITS, &bits, 2);
+		break;
+	default:
+		dbg("%s - Unknown number of data bits, using 8", __func__);
+		cflag |= CS8;
+		bits &= ~BITS_DATA_MASK;
+		bits |= BITS_DATA_8;
+		cp2101_set_config(port, CP2101_BITS, &bits, 2);
+		break;
+	}
+
+	switch (bits & BITS_PARITY_MASK) {
+	case BITS_PARITY_NONE:
+		dbg("%s - parity = NONE", __func__);
+		cflag &= ~PARENB;
+		break;
+	case BITS_PARITY_ODD:
+		dbg("%s - parity = ODD", __func__);
+		cflag |= (PARENB|PARODD);
+		break;
+	case BITS_PARITY_EVEN:
+		dbg("%s - parity = EVEN", __func__);
+		cflag &= ~PARODD;
+		cflag |= PARENB;
+		break;
+	case BITS_PARITY_MARK:
+		dbg("%s - parity = MARK (not supported, disabling parity)",
+				__func__);
+		cflag &= ~PARENB;
+		bits &= ~BITS_PARITY_MASK;
+		cp2101_set_config(port, CP2101_BITS, &bits, 2);
+		break;
+	case BITS_PARITY_SPACE:
+		dbg("%s - parity = SPACE (not supported, disabling parity)",
+				__func__);
+		cflag &= ~PARENB;
+		bits &= ~BITS_PARITY_MASK;
+		cp2101_set_config(port, CP2101_BITS, &bits, 2);
+		break;
+	default:
+		dbg("%s - Unknown parity mode, disabling parity", __func__);
+		cflag &= ~PARENB;
+		bits &= ~BITS_PARITY_MASK;
+		cp2101_set_config(port, CP2101_BITS, &bits, 2);
+		break;
+	}
+
+	cflag &= ~CSTOPB;
+	switch (bits & BITS_STOP_MASK) {
+	case BITS_STOP_1:
+		dbg("%s - stop bits = 1", __func__);
+		break;
+	case BITS_STOP_1_5:
+		dbg("%s - stop bits = 1.5 (not supported, using 1 stop bit)",
+								__func__);
+		bits &= ~BITS_STOP_MASK;
+		cp2101_set_config(port, CP2101_BITS, &bits, 2);
+		break;
+	case BITS_STOP_2:
+		dbg("%s - stop bits = 2", __func__);
+		cflag |= CSTOPB;
+		break;
+	default:
+		dbg("%s - Unknown number of stop bits, using 1 stop bit",
+								__func__);
+		bits &= ~BITS_STOP_MASK;
+		cp2101_set_config(port, CP2101_BITS, &bits, 2);
+		break;
+	}
+
+	cp2101_get_config(port, CP2101_MODEMCTL, modem_ctl, 16);
+	if (modem_ctl[0] & 0x0008) {
+		dbg("%s - flow control = CRTSCTS", __func__);
+		cflag |= CRTSCTS;
+	} else {
+		dbg("%s - flow control = NONE", __func__);
+		cflag &= ~CRTSCTS;
+	}
+
+	*cflagp = cflag;
+}
+
+static void cp2101_set_termios(struct tty_struct *tty,
+		struct usb_serial_port *port, struct ktermios *old_termios)
+{
+	unsigned int cflag, old_cflag;
+	unsigned int baud = 0, bits;
+	unsigned int modem_ctl[4];
+
+	dbg("%s - port %d", __func__, port->number);
+
+	if (!tty)
+		return;
+
+	tty->termios->c_cflag &= ~CMSPAR;
+	cflag = tty->termios->c_cflag;
+	old_cflag = old_termios->c_cflag;
+	baud = cp2101_quantise_baudrate(tty_get_baud_rate(tty));
+
+	/* If the baud rate is to be updated*/
+	if (baud != tty_termios_baud_rate(old_termios) && baud != 0) {
+		dbg("%s - Setting baud rate to %d baud", __func__,
+				baud);
+		if (cp2101_set_config_single(port, CP2101_BAUDRATE,
+					((BAUD_RATE_GEN_FREQ + baud/2) / baud))) {
+			dbg("Baud rate requested not supported by device\n");
+			baud = tty_termios_baud_rate(old_termios);
+		}
+	}
+	/* Report back the resulting baud rate */
+	tty_encode_baud_rate(tty, baud, baud);
+
+	/* If the number of data bits is to be updated */
+	if ((cflag & CSIZE) != (old_cflag & CSIZE)) {
+		cp2101_get_config(port, CP2101_BITS, &bits, 2);
+		bits &= ~BITS_DATA_MASK;
+		switch (cflag & CSIZE) {
+		case CS5:
+			bits |= BITS_DATA_5;
+			dbg("%s - data bits = 5", __func__);
+			break;
+		case CS6:
+			bits |= BITS_DATA_6;
+			dbg("%s - data bits = 6", __func__);
+			break;
+		case CS7:
+			bits |= BITS_DATA_7;
+			dbg("%s - data bits = 7", __func__);
+			break;
+		case CS8:
+			bits |= BITS_DATA_8;
+			dbg("%s - data bits = 8", __func__);
+			break;
+		/*case CS9:
+			bits |= BITS_DATA_9;
+			dbg("%s - data bits = 9", __func__);
+			break;*/
+		default:
+			dbg("cp2101 driver does not "
+					"support the number of bits requested,"
+					" using 8 bit mode\n");
+				bits |= BITS_DATA_8;
+				break;
+		}
+		if (cp2101_set_config(port, CP2101_BITS, &bits, 2))
+			dbg("Number of data bits requested "
+					"not supported by device\n");
+	}
+
+	if ((cflag & (PARENB|PARODD)) != (old_cflag & (PARENB|PARODD))) {
+		cp2101_get_config(port, CP2101_BITS, &bits, 2);
+		bits &= ~BITS_PARITY_MASK;
+		if (cflag & PARENB) {
+			if (cflag & PARODD) {
+				bits |= BITS_PARITY_ODD;
+				dbg("%s - parity = ODD", __func__);
+			} else {
+				bits |= BITS_PARITY_EVEN;
+				dbg("%s - parity = EVEN", __func__);
+			}
+		}
+		if (cp2101_set_config(port, CP2101_BITS, &bits, 2))
+			dbg("Parity mode not supported "
+					"by device\n");
+	}
+
+	if ((cflag & CSTOPB) != (old_cflag & CSTOPB)) {
+		cp2101_get_config(port, CP2101_BITS, &bits, 2);
+		bits &= ~BITS_STOP_MASK;
+		if (cflag & CSTOPB) {
+			bits |= BITS_STOP_2;
+			dbg("%s - stop bits = 2", __func__);
+		} else {
+			bits |= BITS_STOP_1;
+			dbg("%s - stop bits = 1", __func__);
+		}
+		if (cp2101_set_config(port, CP2101_BITS, &bits, 2))
+			dbg("Number of stop bits requested "
+					"not supported by device\n");
+	}
+
+	if ((cflag & CRTSCTS) != (old_cflag & CRTSCTS)) {
+		cp2101_get_config(port, CP2101_MODEMCTL, modem_ctl, 16);
+		dbg("%s - read modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x",
+				__func__, modem_ctl[0], modem_ctl[1],
+				modem_ctl[2], modem_ctl[3]);
+
+		if (cflag & CRTSCTS) {
+			modem_ctl[0] &= ~0x7B;
+			modem_ctl[0] |= 0x09;
+			modem_ctl[1] = 0x80;
+			dbg("%s - flow control = CRTSCTS", __func__);
+		} else {
+			modem_ctl[0] &= ~0x7B;
+			modem_ctl[0] |= 0x01;
+			modem_ctl[1] |= 0x40;
+			dbg("%s - flow control = NONE", __func__);
+		}
+
+		dbg("%s - write modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x",
+				__func__, modem_ctl[0], modem_ctl[1],
+				modem_ctl[2], modem_ctl[3]);
+		cp2101_set_config(port, CP2101_MODEMCTL, modem_ctl, 16);
+	}
+
+}
+
+static int cp2101_tiocmset (struct tty_struct *tty, struct file *file,
+		unsigned int set, unsigned int clear)
+{
+	struct usb_serial_port *port = tty->driver_data;
+	return cp2101_tiocmset_port(port, file, set, clear);
+}
+
+static int cp2101_tiocmset_port(struct usb_serial_port *port, struct file *file,
+		unsigned int set, unsigned int clear)
+{
+	unsigned int control = 0;
+
+	dbg("%s - port %d", __func__, port->number);
+
+	if (set & TIOCM_RTS) {
+		control |= CONTROL_RTS;
+		control |= CONTROL_WRITE_RTS;
+	}
+	if (set & TIOCM_DTR) {
+		control |= CONTROL_DTR;
+		control |= CONTROL_WRITE_DTR;
+	}
+	if (clear & TIOCM_RTS) {
+		control &= ~CONTROL_RTS;
+		control |= CONTROL_WRITE_RTS;
+	}
+	if (clear & TIOCM_DTR) {
+		control &= ~CONTROL_DTR;
+		control |= CONTROL_WRITE_DTR;
+	}
+
+	dbg("%s - control = 0x%.4x", __func__, control);
+
+	return cp2101_set_config(port, CP2101_CONTROL, &control, 2);
+}
+
+static int cp2101_tiocmget (struct tty_struct *tty, struct file *file)
+{
+	struct usb_serial_port *port = tty->driver_data;
+	unsigned int control;
+	int result;
+
+	dbg("%s - port %d", __func__, port->number);
+
+	cp2101_get_config(port, CP2101_CONTROL, &control, 1);
+
+	result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0)
+		|((control & CONTROL_RTS) ? TIOCM_RTS : 0)
+		|((control & CONTROL_CTS) ? TIOCM_CTS : 0)
+		|((control & CONTROL_DSR) ? TIOCM_DSR : 0)
+		|((control & CONTROL_RING)? TIOCM_RI  : 0)
+		|((control & CONTROL_DCD) ? TIOCM_CD  : 0);
+
+	dbg("%s - control = 0x%.2x", __func__, control);
+
+	return result;
+}
+
+static void cp2101_break_ctl (struct tty_struct *tty, int break_state)
+{
+	struct usb_serial_port *port = tty->driver_data;
+	unsigned int state;
+
+	dbg("%s - port %d", __func__, port->number);
+	if (break_state == 0)
+		state = BREAK_OFF;
+	else
+		state = BREAK_ON;
+	dbg("%s - turning break %s", __func__,
+			state == BREAK_OFF ? "off" : "on");
+	cp2101_set_config(port, CP2101_BREAK, &state, 2);
+}
+
+static int cp2101_startup(struct usb_serial *serial)
+{
+	/* CP2101 buffers behave strangely unless device is reset */
+	usb_reset_device(serial->dev);
+	return 0;
+}
+
+static void cp2101_shutdown(struct usb_serial *serial)
+{
+	int i;
+
+	dbg("%s", __func__);
+
+	/* Stop reads and writes on all ports */
+	for (i = 0; i < serial->num_ports; ++i)
+		cp2101_cleanup(serial->port[i]);
+}
+
+static int __init cp2101_init(void)
+{
+	int retval;
+
+	retval = usb_serial_register(&cp2101_device);
+	if (retval)
+		return retval; /* Failed to register */
+
+	retval = usb_register(&cp2101_driver);
+	if (retval) {
+		/* Failed to register */
+		usb_serial_deregister(&cp2101_device);
+		return retval;
+	}
+
+	/* Success */
+	printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
+	       DRIVER_DESC "\n");
+	return 0;
+}
+
+static void __exit cp2101_exit(void)
+{
+	usb_deregister(&cp2101_driver);
+	usb_serial_deregister(&cp2101_device);
+}
+
+module_init(cp2101_init);
+module_exit(cp2101_exit);
+
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_VERSION(DRIVER_VERSION);
+MODULE_LICENSE("GPL");
+
+module_param(debug, bool, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(debug, "Enable verbose debugging messages");