/* * Prolific PL2303 USB to serial adaptor driver * * Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com) * * Original driver for 2.2.x by anonymous * *	This program is free software; you can redistribute it and/or modify *	it under the terms of the GNU General Public License as published by *	the Free Software Foundation; either version 2 of the License, or *	(at your option) any later version. * * See Documentation/usb/usb-serial.txt for more information on using this driver * * 2001_Oct_06 gkh *	Added RTS and DTR line control.  Thanks to joe@bndlg.de for parts of it. * * 2001_Sep_19 gkh *	Added break support. * * 2001_Aug_30 gkh *	fixed oops in write_bulk_callback. * * 2001_Aug_28 gkh *	reworked buffer logic to be like other usb-serial drivers.  Hopefully *	removing some reported problems. * * 2001_Jun_06 gkh *	finished porting to 2.4 format. * */#include <linux/config.h>#include <linux/kernel.h>#include <linux/sched.h>#include <linux/signal.h>#include <linux/errno.h>#include <linux/poll.h>#include <linux/init.h>#include <linux/slab.h>#include <linux/fcntl.h>#include <linux/tty.h>#include <linux/tty_driver.h>#include <linux/tty_flip.h>#include <linux/serial.h>#include <linux/module.h>#include <linux/spinlock.h>#include <linux/usb.h>#ifdef CONFIG_USB_SERIAL_DEBUG	static int debug = 1;#else	static int debug;#endif#include "usb-serial.h"#include "pl2303.h"/* * Version Information */#define DRIVER_VERSION "v0.91"#define DRIVER_DESC "Prolific PL2303 USB to serial adaptor driver"static __devinitdata struct usb_device_id id_table [] = {	{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID) },	{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ2) },	{ USB_DEVICE(IODATA_VENDOR_ID, IODATA_PRODUCT_ID) },	{ USB_DEVICE(ATEN_VENDOR_ID, ATEN_PRODUCT_ID) },	{ }					/* Terminating entry */};MODULE_DEVICE_TABLE (usb, id_table);#define SET_LINE_REQUEST_TYPE		0x21#define SET_LINE_REQUEST		0x20#define SET_CONTROL_REQUEST_TYPE	0x21#define SET_CONTROL_REQUEST		0x22#define CONTROL_DTR			0x01#define CONTROL_RTS			0x02#define BREAK_REQUEST_TYPE		0x21#define BREAK_REQUEST			0x23	#define BREAK_ON			0xffff#define BREAK_OFF			0x0000#define GET_LINE_REQUEST_TYPE		0xa1#define GET_LINE_REQUEST		0x21#define VENDOR_WRITE_REQUEST_TYPE	0x40#define VENDOR_WRITE_REQUEST		0x01#define VENDOR_READ_REQUEST_TYPE	0xc0#define VENDOR_READ_REQUEST		0x01/* function prototypes for a PL2303 serial converter */static int pl2303_open (struct usb_serial_port *port, struct file *filp);static void pl2303_close (struct usb_serial_port *port, struct file *filp);static void pl2303_set_termios (struct usb_serial_port *port,				struct termios *old);static int pl2303_ioctl (struct usb_serial_port *port, struct file *file,			 unsigned int cmd, unsigned long arg);static void pl2303_read_int_callback (struct urb *urb);static void pl2303_read_bulk_callback (struct urb *urb);static void pl2303_write_bulk_callback (struct urb *urb);static int pl2303_write (struct usb_serial_port *port, int from_user,			 const unsigned char *buf, int count);static void pl2303_break_ctl(struct usb_serial_port *port,int break_state);static int pl2303_startup (struct usb_serial *serial);static void pl2303_shutdown (struct usb_serial *serial);/* All of the device info needed for the PL2303 SIO serial converter */static struct usb_serial_device_type pl2303_device = {	name:			"PL-2303",	id_table:		id_table,	needs_interrupt_in:	DONT_CARE,		/* this device must have an interrupt in endpoint */	needs_bulk_in:		MUST_HAVE,		/* this device must have a bulk in endpoint */	needs_bulk_out:		MUST_HAVE,		/* this device must have a bulk out endpoint */	num_interrupt_in:	NUM_DONT_CARE,	num_bulk_in:		1,	num_bulk_out:		1,	num_ports:		1,	open:			pl2303_open,	close:			pl2303_close,	write:			pl2303_write,	ioctl:			pl2303_ioctl,	break_ctl:		pl2303_break_ctl,	set_termios:		pl2303_set_termios,	read_bulk_callback:	pl2303_read_bulk_callback,	read_int_callback:	pl2303_read_int_callback,	write_bulk_callback:	pl2303_write_bulk_callback,	startup:		pl2303_startup,	shutdown:		pl2303_shutdown,};struct pl2303_private {	u8 line_control;	u8 driverType;};static int pl2303_startup (struct usb_serial *serial){	struct pl2303_private *priv;	int i;	for (i = 0; i < serial->num_ports; ++i) {		priv = kmalloc (sizeof (struct pl2303_private), GFP_KERNEL);		if (!priv)			return -ENOMEM;		memset (priv, 0x00, sizeof (struct pl2303_private));		serial->port[i].private = priv;	}	return 0;}static int set_control_lines (struct usb_device *dev, u8 value){	int retval;		retval = usb_control_msg (dev, usb_sndctrlpipe (dev, 0),				  SET_CONTROL_REQUEST, SET_CONTROL_REQUEST_TYPE,				  value, 0, NULL, 0, 100);	dbg (__FUNCTION__" - value = %d, retval = %d", value, retval);	return retval;}static int pl2303_write (struct usb_serial_port *port, int from_user,  const unsigned char *buf, int count){	int result;	dbg (__FUNCTION__ " - port %d, %d bytes", port->number, count);	if (!port->tty) {		err (__FUNCTION__ " - no tty???");		return 0;	}	if (port->write_urb->status == -EINPROGRESS) {		dbg (__FUNCTION__ " - already writing");		return 0;	}	count = (count > port->bulk_out_size) ? port->bulk_out_size : count;	if (from_user) {		if (copy_from_user (port->write_urb->transfer_buffer, buf, count))			return -EFAULT;	} else {		memcpy (port->write_urb->transfer_buffer, buf, count);	}		usb_serial_debug_data (__FILE__, __FUNCTION__, count, port->write_urb->transfer_buffer);	port->write_urb->transfer_buffer_length = count;	port->write_urb->dev = port->serial->dev;	result = usb_submit_urb (port->write_urb);	if (result)		err(__FUNCTION__ " - failed submitting write urb, error %d", result);	else		result = count;	return result;}static void pl2303_set_termios (struct usb_serial_port *port, struct termios *old_termios){	struct usb_serial *serial = port->serial;	struct pl2303_private *priv = port->private;	unsigned int cflag;	unsigned char *buf;	int baud;	int i;	dbg (__FUNCTION__ " -  port %d", port->number);	if ((!port->tty) || (!port->tty->termios)) {		dbg(__FUNCTION__" - no tty structures");		return;	}	cflag = port->tty->termios->c_cflag;	/* check that they really want us to change something */	if (old_termios) {		if ((cflag == old_termios->c_cflag) &&		    (RELEVANT_IFLAG(port->tty->termios->c_iflag) == RELEVANT_IFLAG(old_termios->c_iflag))) {		    dbg(__FUNCTION__ " - nothing to change...");		    return;		}	}	buf = kmalloc (7, GFP_KERNEL);	if (!buf) {		err(__FUNCTION__ " - out of memory.");		return;	}	memset (buf, 0x00, 0x07);		i = usb_control_msg (serial->dev, usb_rcvctrlpipe (serial->dev, 0),			     GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE,			     0, 0, buf, 7, 100);	dbg ("0xa1:0x21:0:0  %d - %x %x %x %x %x %x %x", i,	     buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]);	i = usb_control_msg (serial->dev, usb_sndctrlpipe (serial->dev, 0),			     VENDOR_WRITE_REQUEST, VENDOR_WRITE_REQUEST_TYPE,			     0, 1, NULL, 0, 100);	dbg ("0x40:1:0:1  %d", i);	if (cflag & CSIZE) {		switch (cflag & CSIZE) {			case CS5:	buf[6] = 5;	break;			case CS6:	buf[6] = 6;	break;			case CS7:	buf[6] = 7;	break;			default:			case CS8:	buf[6] = 8;	break;		}		dbg (__FUNCTION__ " - data bits = %d", buf[6]);	}	baud = 0;	switch (cflag & CBAUD) {		case B0:	baud = 0;	break;		case B75:	baud = 75;	break;		case B150:	baud = 150;	break;		case B300:	baud = 1228800;	break;		case B600:	baud = 600;	break;		case B1200:	baud = 1200;	break;		case B1800:	baud = 1800;	break;		case B2400:	baud = 2400;	break;		case B4800:	baud = 4800;	break;		case B9600:	baud = 9600;	break;		case B19200:	baud = 19200;	break;		case B38400:	baud = 38400;	break;		case B57600:	baud = 57600;	break;		case B115200:	baud = 115200;	break;		case B230400:	baud = 230400;	break;		case B460800:	baud = 460800;	break;		default:			err ("pl2303 driver does not support the baudrate requested (fix it)");			break;	}	dbg (__FUNCTION__ " - baud = %d", baud);	if (baud) {		buf[0] = baud & 0xff;		buf[1] = (baud >> 8) & 0xff;		buf[2] = (baud >> 16) & 0xff;		buf[3] = (baud >> 24) & 0xff;	}	/* For reference buf[4]=0 is 1 stop bits */	/* For reference buf[4]=1 is 1.5 stop bits */	/* For reference buf[4]=2 is 2 stop bits */	if (cflag & CSTOPB) {		buf[4] = 2;		dbg(__FUNCTION__ " - stop bits = 2");	} else {		buf[4] = 0;		dbg(__FUNCTION__ " - stop bits = 1");	}	if (cflag & PARENB) {		/* For reference buf[5]=0 is none parity */		/* For reference buf[5]=1 is odd parity */		/* For reference buf[5]=2 is even parity */		/* For reference buf[5]=3 is mark parity */		/* For reference buf[5]=4 is space parity */		if (cflag & PARODD) {			buf[5] = 1;			dbg(__FUNCTION__ " - parity = odd");		} else {			buf[5] = 2;			dbg(__FUNCTION__ " - parity = even");		}	} else {		buf[5] = 0;		dbg(__FUNCTION__ " - parity = none");	}	i = usb_control_msg (serial->dev, usb_sndctrlpipe (serial->dev, 0),			     SET_LINE_REQUEST, SET_LINE_REQUEST_TYPE,			     0, 0, buf, 7, 100);	dbg ("0x21:0x20:0:0  %d", i);	if (cflag && CBAUD) {		priv = port->private;		if ((cflag && CBAUD) == B0)			priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS);		else			priv->line_control |= (CONTROL_DTR | CONTROL_RTS);		set_control_lines (serial->dev, priv->line_control);	}		buf[0] = buf[1] = buf[2] = buf[3] = buf[4] = buf[5] = buf[6] = 0;	i = usb_control_msg (serial->dev, usb_rcvctrlpipe (serial->dev, 0),			     GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE,			     0, 0, buf, 7, 100);	dbg ("0xa1:0x21:0:0  %d - %x %x %x %x %x %x %x", i,	     buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]);	if (cflag & CRTSCTS) {		if(priv->driverType == 2) {			i = usb_control_msg (serial->dev, usb_sndctrlpipe (serial->dev, 0),						VENDOR_WRITE_REQUEST, VENDOR_WRITE_REQUEST_TYPE, 0x0, 0x61, NULL, 0, 100);			dbg ("0x40:0x1:0x0:0x61  %d", i);		} else {			i = usb_control_msg (serial->dev, usb_sndctrlpipe (serial->dev, 0),						VENDOR_WRITE_REQUEST, VENDOR_WRITE_REQUEST_TYPE, 0x0, 0x41, NULL, 0, 100);			dbg ("0x40:0x1:0x0:0x41  %d", i);		}	}	kfree (buf);}static int pl2303_open (struct usb_serial_port *port, struct file *filp){	struct termios tmp_termios;	struct usb_serial *serial = port->serial;	unsigned char buf[10];	int result;	struct pl2303_private *priv = port->private;	if (port_paranoia_check (port, __FUNCTION__))		return -ENODEV;			dbg (__FUNCTION__ " -  port %d", port->number);	if(serial->dev->descriptor.bDeviceClass == 0x02)		priv->driverType = 0;	else if(serial->dev->descriptor.bMaxPacketSize0 == 0x40)		priv->driverType = 2;	else if(serial->dev->descriptor.bDeviceClass == 0x00)		priv->driverType = 1;	else if(serial->dev->descriptor.bDeviceClass == 0xFF)		priv->driverType = 1;