From: Greg KH <greg@kroah.com>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: linux-usb-devel@lists.sourceforge.net
Subject: [PATCH 13 of 15] USB Serial pl2303 driver added
This patch adds the pl2303 driver.
diff -Nru a/drivers/usb/serial/pl2303.c b/drivers/usb/serial/pl2303.c
--- /dev/null Wed Dec 31 16:00:00 1969
+++ b/drivers/usb/serial/pl2303.c Thu Jan 3 21:41:54 2002
@@ -0,0 +1,825 @@
+/*
+ * 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 "v0.9"
+#define DRIVER_DESC "Prolific PL2303 USB to serial adaptor driver"
+
+
+#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);
+
+
+static u16 pl2303_vendor_id = PL2303_VENDOR_ID;
+static u16 pl2303_product_id = PL2303_PRODUCT_ID;
+static u16 rsaq2_product_id = PL2303_PRODUCT_ID_RSAQ2;
+static u16 iodata_vendor_id = IODATA_VENDOR_ID;
+static u16 iodata_product_id = IODATA_PRODUCT_ID;
+static u16 aten_vendor_id = ATEN_VENDOR_ID;
+static u16 aten_product_id = ATEN_PRODUCT_ID;
+
+/* All of the device info needed for the PL2303 SIO serial converters */
+static struct usb_serial_device_type pl2303_device = {
+ name: "PL-2303",
+ idVendor: &pl2303_vendor_id,
+ idProduct: &pl2303_product_id,
+ 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,
+};
+static struct usb_serial_device_type rsaq2_device = {
+ name: "PL-2303 RSAQ2",
+ idVendor: &pl2303_vendor_id,
+ idProduct: &rsaq2_product_id,
+ 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,
+};
+static struct usb_serial_device_type iodata_device = {
+ name: "PL-2303 IOData",
+ idVendor: &iodata_vendor_id,
+ idProduct: &iodata_product_id,
+ 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,
+};
+static struct usb_serial_device_type aten_device = {
+ name: "PL-2303 Aten",
+ idVendor: &aten_vendor_id,
+ idProduct: &aten_product_id,
+ 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;
+};
+
+
+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;
+ 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 = 300; 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) {
+ i = usb_control_msg (serial->dev, usb_sndctrlpipe (serial->dev, 0),
+ VENDOR_WRITE_REQUEST_TYPE, 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;
+
+ if (port_paranoia_check (port, __FUNCTION__))
+ return -ENODEV;
+
+ dbg (__FUNCTION__ " - port %d", port->number);
+
+ down (&port->sem);
+
+ ++port->open_count;
+ MOD_INC_USE_COUNT;
+
+ if (!port->active) {
+ port->active = 1;
+
+#define FISH(a,b,c,d) \
+ result=usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev,0), \
+ b, a, c, d, buf, 1, 100); \
+ dbg("0x%x:0x%x:0x%x:0x%x %d - %x",a,b,c,d,result,buf[0]);
+
+#define SOUP(a,b,c,d) \
+ result=usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev,0), \
+ b, a, c, d, NULL, 0, 100); \
+ dbg("0x%x:0x%x:0x%x:0x%x %d",a,b,c,d,result);
+
+ FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8484, 0);
+ SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 0x0404, 0);
+ FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8484, 0);
+ FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8383, 0);
+ FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8484, 0);
+ SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 0x0404, 1);
+ FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8484, 0);
+ FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8383, 0);
+ SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 0, 1);
+ SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 1, 0xc0);
+ SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 2, 4);
+
+ /* Setup termios */
+ *(port->tty->termios) = tty_std_termios;
+ port->tty->termios->c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
+
+ pl2303_set_termios (port, &tmp_termios);
+
+ //FIXME: need to assert RTS and DTR if CRTSCTS off
+
+ dbg (__FUNCTION__ " - submitting read urb");
+ port->read_urb->dev = serial->dev;
+ result = usb_submit_urb (port->read_urb);
+ if (result) {
+ err(__FUNCTION__ " - failed submitting read urb, error %d", result);
+ up (&port->sem);
+ pl2303_close (port, NULL);
+ return -EPROTO;
+ }
+
+ dbg (__FUNCTION__ " - submitting interrupt urb");
+ port->interrupt_in_urb->dev = serial->dev;
+ result = usb_submit_urb (port->interrupt_in_urb);
+ if (result) {
+ err(__FUNCTION__ " - failed submitting interrupt urb, error %d", result);
+ up (&port->sem);
+ pl2303_close (port, NULL);
+ return -EPROTO;
+ }
+ }
+ up (&port->sem);
+ return 0;
+}
+
+
+static void pl2303_close (struct usb_serial_port *port, struct file *filp)
+{
+ struct usb_serial *serial;
+ struct pl2303_private *priv;
+ unsigned int c_cflag;
+ int result;
+
+ if (port_paranoia_check (port, __FUNCTION__))
+ return;
+ serial = get_usb_serial (port, __FUNCTION__);
+ if (!serial)
+ return;
+
+ dbg (__FUNCTION__ " - port %d", port->number);
+
+ down (&port->sem);
+
+ --port->open_count;
+ if (port->open_count <= 0) {
+ if (serial->dev) {
+ c_cflag = port->tty->termios->c_cflag;
+ if (c_cflag & HUPCL) {
+ /* drop DTR and RTS */
+ priv = port->private;
+ priv->line_control = 0;
+ set_control_lines (port->serial->dev,
+ priv->line_control);
+ }
+
+ /* shutdown our urbs */
+ dbg (__FUNCTION__ " - shutting down urbs");
+ result = usb_unlink_urb (port->write_urb);
+ if (result)
+ dbg (__FUNCTION__ " - usb_unlink_urb "
+ "(write_urb) failed with reason: %d",
+ result);
+
+ result = usb_unlink_urb (port->read_urb);
+ if (result)
+ dbg (__FUNCTION__ " - usb_unlink_urb "
+ "(read_urb) failed with reason: %d",
+ result);
+
+ result = usb_unlink_urb (port->interrupt_in_urb);
+ if (result)
+ dbg (__FUNCTION__ " - usb_unlink_urb "
+ "(interrupt_in_urb) failed with reason: %d",
+ result);
+ }
+
+ port->active = 0;
+ port->open_count = 0;
+ }
+
+ up (&port->sem);
+ MOD_DEC_USE_COUNT;
+}
+
+static int set_modem_info (struct usb_serial_port *port, unsigned int cmd, unsigned int *value)
+{
+ struct pl2303_private *priv = port->private;
+ unsigned int arg;
+
+ if (copy_from_user(&arg, value, sizeof(int)))
+ return -EFAULT;
+
+ switch (cmd) {
+ case TIOCMBIS:
+ if (arg & TIOCM_RTS)
+ priv->line_control |= CONTROL_RTS;
+ if (arg & TIOCM_DTR)
+ priv->line_control |= CONTROL_DTR;
+ break;
+
+ case TIOCMBIC:
+ if (arg & TIOCM_RTS)
+ priv->line_control &= ~CONTROL_RTS;
+ if (arg & TIOCM_DTR)
+ priv->line_control &= ~CONTROL_DTR;
+ break;
+
+ case TIOCMSET:
+ /* turn off RTS and DTR and then only turn
+ on what was asked to */
+ priv->line_control &= ~(CONTROL_RTS | CONTROL_DTR);
+ priv->line_control |= ((arg & TIOCM_RTS) ? CONTROL_RTS : 0);
+ priv->line_control |= ((arg & TIOCM_DTR) ? CONTROL_DTR : 0);
+ break;
+ }
+
+ return set_control_lines (port->serial->dev, priv->line_control);
+}
+
+static int get_modem_info (struct usb_serial_port *port, unsigned int *value)
+{
+ struct pl2303_private *priv = port->private;
+ unsigned int mcr = priv->line_control;
+ unsigned int result;
+
+ result = ((mcr & CONTROL_DTR) ? TIOCM_DTR : 0)
+ | ((mcr & CONTROL_RTS) ? TIOCM_RTS : 0);
+
+ dbg (__FUNCTION__ " - result = %x", result);
+
+ if (copy_to_user(value, &result, sizeof(int)))
+ return -EFAULT;
+ return 0;
+}
+
+static int pl2303_ioctl (struct usb_serial_port *port, struct file *file, unsigned int cmd, unsigned long arg)
+{
+ dbg (__FUNCTION__" (%d) cmd = 0x%04x", port->number, cmd);
+
+ switch (cmd) {
+
+ case TIOCMGET:
+ dbg (__FUNCTION__" (%d) TIOCMGET", port->number);
+ return get_modem_info (port, (unsigned int *)arg);
+
+ case TIOCMBIS:
+ case TIOCMBIC:
+ case TIOCMSET:
+ dbg(__FUNCTION__" (%d) TIOCMSET/TIOCMBIC/TIOCMSET", port->number);
+ return set_modem_info(port, cmd, (unsigned int *) arg);
+
+ default:
+ dbg (__FUNCTION__" not supported = 0x%04x", cmd);
+ break;
+ }
+
+ return -ENOIOCTLCMD;
+}
+
+
+static void pl2303_break_ctl (struct usb_serial_port *port, int break_state)
+{
+ struct usb_serial *serial = port->serial;
+ u16 state;
+ int result;
+
+ dbg (__FUNCTION__ " - port %d", port->number);
+
+ if (break_state == 0)
+ state = BREAK_OFF;
+ else
+ state = BREAK_ON;
+ dbg (__FUNCTION__" - turning break %s", state==BREAK_OFF ? "off" : "on");
+
+ result = usb_control_msg (serial->dev, usb_rcvctrlpipe (serial->dev, 0),
+ BREAK_REQUEST, BREAK_REQUEST_TYPE, state,
+ 0, NULL, 0, 100);
+ if (result)
+ dbg (__FUNCTION__" - error sending break = %d", result);
+}
+
+
+static void pl2303_shutdown (struct usb_serial *serial)
+{
+ int i;
+
+ dbg (__FUNCTION__);
+
+ /* stop everything on all ports */
+ for (i = 0; i < serial->num_ports; ++i)
+ while (serial->port[i].open_count > 0) {
+ pl2303_close (&serial->port[i], NULL);
+ kfree (serial->port[i].private);
+ }
+}
+
+
+static void pl2303_read_int_callback (struct urb *urb)
+{
+ struct usb_serial_port *port = (struct usb_serial_port *) urb->context;
+ struct usb_serial *serial = get_usb_serial (port, __FUNCTION__);
+ //unsigned char *data = urb->transfer_buffer;
+ //int i;
+
+//ints auto restart...
+
+ if (!serial) {
+ return;
+ }
+
+ if (urb->status) {
+ urb->status = 0;
+ return;
+ }
+
+ usb_serial_debug_data (__FILE__, __FUNCTION__, urb->actual_length, urb->transfer_buffer);
+#if 0
+//FIXME need to update state of terminal lines variable
+#endif
+
+ return;
+}
+
+
+static void pl2303_read_bulk_callback (struct urb *urb)
+{
+ struct usb_serial_port *port = (struct usb_serial_port *) urb->context;
+ struct usb_serial *serial = get_usb_serial (port, __FUNCTION__);
+ struct tty_struct *tty;
+ unsigned char *data = urb->transfer_buffer;
+ int i;
+ int result;
+
+ if (port_paranoia_check (port, __FUNCTION__))
+ return;
+
+ dbg(__FUNCTION__ " - port %d", port->number);
+
+ if (!serial) {
+ dbg(__FUNCTION__ " - bad serial pointer, exiting");
+ return;
+ }
+
+ if (urb->status) {
+ dbg (__FUNCTION__ " - urb->status = %d", urb->status);
+ if (!port->active) {
+ dbg (__FUNCTION__ " - port is closed, exiting.");
+ return;
+ }
+ if (urb->status == -EPROTO) {
+ /* PL2303 mysteriously fails with -EPROTO reschedule the read */
+ dbg (__FUNCTION__ " - caught -EPROTO, resubmitting the urb");
+ urb->status = 0;
+ urb->dev = serial->dev;
+ result = usb_submit_urb(urb);
+ if (result)
+ err(__FUNCTION__ " - failed resubmitting read urb, error %d", result);
+ return;
+ }
+ dbg (__FUNCTION__ " - unable to handle the error, exiting.");
+ return;
+ }
+
+ usb_serial_debug_data (__FILE__, __FUNCTION__, urb->actual_length, data);
+
+ tty = port->tty;
+ if (urb->actual_length) {
+ for (i = 0; i < urb->actual_length; ++i) {
+ if (tty->flip.count >= TTY_FLIPBUF_SIZE) {
+ tty_flip_buffer_push(tty);
+ }
+ tty_insert_flip_char (tty, data[i], 0);
+ }
+ tty_flip_buffer_push (tty);
+ }
+
+ /* Schedule the next read _if_ we are still open */
+ if (port->active) {
+ urb->dev = serial->dev;
+ result = usb_submit_urb(urb);
+ if (result)
+ err(__FUNCTION__ " - failed resubmitting read urb, error %d", result);
+ }
+
+ return;
+}
+
+
+
+static void pl2303_write_bulk_callback (struct urb *urb)
+{
+ struct usb_serial_port *port = (struct usb_serial_port *) urb->context;
+ int result;
+
+ if (port_paranoia_check (port, __FUNCTION__))
+ return;
+
+ dbg(__FUNCTION__ " - port %d", port->number);
+
+ if (urb->status) {
+ /* error in the urb, so we have to resubmit it */
+ if (serial_paranoia_check (port->serial, __FUNCTION__)) {
+ return;
+ }
+ dbg (__FUNCTION__ " - Overflow in write");
+ dbg (__FUNCTION__ " - nonzero write bulk status received: %d", urb->status);
+ port->write_urb->transfer_buffer_length = 1;
+ port->write_urb->dev = port->serial->dev;
+ result = usb_submit_urb (port->write_urb);
+ if (result)
+ err(__FUNCTION__ " - failed resubmitting write urb, error %d", result);
+
+ return;
+ }
+
+ queue_task(&port->tqueue, &tq_immediate);
+ mark_bh(IMMEDIATE_BH);
+
+ return;
+}
+
+
+static int __init pl2303_init (void)
+{
+ usb_serial_register (&pl2303_device);
+ usb_serial_register (&rsaq2_device);
+ usb_serial_register (&iodata_device);
+ usb_serial_register (&aten_device);
+ info(DRIVER_DESC " " DRIVER_VERSION);
+ return 0;
+}
+
+
+static void __exit pl2303_exit (void)
+{
+ usb_serial_deregister (&pl2303_device);
+ usb_serial_deregister (&rsaq2_device);
+ usb_serial_deregister (&iodata_device);
+ usb_serial_deregister (&aten_device);
+}
+
+
+module_init(pl2303_init);
+module_exit(pl2303_exit);
+
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE("GPL");
+
+MODULE_PARM(debug, "i");
+MODULE_PARM_DESC(debug, "Debug enabled or not");
+
diff -Nru a/drivers/usb/serial/pl2303.h b/drivers/usb/serial/pl2303.h
--- /dev/null Wed Dec 31 16:00:00 1969
+++ b/drivers/usb/serial/pl2303.h Thu Jan 3 21:41:54 2002
@@ -0,0 +1,18 @@
+/*
+ * Prolific PL2303 USB to serial adaptor driver header file
+ *
+ * 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.
+ *
+ */
+#define PL2303_VENDOR_ID 0x067b
+#define PL2303_PRODUCT_ID 0x2303
+#define PL2303_PRODUCT_ID_RSAQ2 0x04bb
+
+#define ATEN_VENDOR_ID 0x0557
+#define ATEN_PRODUCT_ID 0x2008
+
+#define IODATA_VENDOR_ID 0x04bb
+#define IODATA_PRODUCT_ID 0x0a03